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-rw-r--r--fs/udf/Kconfig19
-rw-r--r--fs/udf/Makefile1
-rw-r--r--fs/udf/balloc.c330
-rw-r--r--fs/udf/dir.c199
-rw-r--r--fs/udf/directory.c593
-rw-r--r--fs/udf/ecma_167.h174
-rw-r--r--fs/udf/file.c299
-rw-r--r--fs/udf/ialloc.c96
-rw-r--r--fs/udf/inode.c1814
-rw-r--r--fs/udf/lowlevel.c45
-rw-r--r--fs/udf/misc.c50
-rw-r--r--fs/udf/namei.c1345
-rw-r--r--fs/udf/osta_udf.h152
-rw-r--r--fs/udf/partition.c41
-rw-r--r--fs/udf/super.c2112
-rw-r--r--fs/udf/symlink.c128
-rw-r--r--fs/udf/truncate.c110
-rw-r--r--fs/udf/udf_i.h18
-rw-r--r--fs/udf/udf_sb.h53
-rw-r--r--fs/udf/udfdecl.h146
-rw-r--r--fs/udf/udfend.h1
-rw-r--r--fs/udf/udftime.c141
-rw-r--r--fs/udf/unicode.c705
23 files changed, 4357 insertions, 4215 deletions
diff --git a/fs/udf/Kconfig b/fs/udf/Kconfig
index 0e0e99bd6bce..8f7ce30d47fd 100644
--- a/fs/udf/Kconfig
+++ b/fs/udf/Kconfig
@@ -1,18 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0-only
config UDF_FS
tristate "UDF file system support"
+ select BUFFER_HEAD
select CRC_ITU_T
+ select NLS
+ select LEGACY_DIRECT_IO
help
- This is the new file system used on some CD-ROMs and DVDs. Say Y if
- you intend to mount DVD discs or CDRW's written in packet mode, or
- if written to by other UDF utilities, such as DirectCD.
- Please read <file:Documentation/filesystems/udf.txt>.
+ This is a file system used on some CD-ROMs and DVDs. Since the
+ file system is supported by multiple operating systems and is more
+ compatible with standard unix file systems, it is also suitable for
+ removable USB disks. Say Y if you intend to mount DVD discs or CDRW's
+ written in packet mode, or if you want to use UDF for removable USB
+ disks. Please read <file:Documentation/filesystems/udf.rst>.
To compile this file system support as a module, choose M here: the
module will be called udf.
If unsure, say N.
-
-config UDF_NLS
- bool
- default y
- depends on (UDF_FS=m && NLS) || (UDF_FS=y && NLS=y)
diff --git a/fs/udf/Makefile b/fs/udf/Makefile
index eb880f66c23a..63981cd333e3 100644
--- a/fs/udf/Makefile
+++ b/fs/udf/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
#
# Makefile for the linux udf-filesystem routines.
#
diff --git a/fs/udf/balloc.c b/fs/udf/balloc.c
index 1ba2baaf4367..807c493ed0cd 100644
--- a/fs/udf/balloc.c
+++ b/fs/udf/balloc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* balloc.c
*
@@ -5,11 +6,6 @@
* Block allocation handling routines for the OSTA-UDF(tm) filesystem.
*
* COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
- *
* (C) 1999-2001 Ben Fennema
* (C) 1999 Stelias Computing Inc
*
@@ -21,8 +17,8 @@
#include "udfdecl.h"
-#include <linux/buffer_head.h>
#include <linux/bitops.h>
+#include <linux/overflow.h>
#include "udf_i.h"
#include "udf_sb.h"
@@ -37,58 +33,74 @@ static int read_block_bitmap(struct super_block *sb,
unsigned long bitmap_nr)
{
struct buffer_head *bh = NULL;
- int retval = 0;
+ int i;
+ int max_bits, off, count;
struct kernel_lb_addr loc;
loc.logicalBlockNum = bitmap->s_extPosition;
loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
- bh = udf_tread(sb, udf_get_lb_pblock(sb, &loc, block));
+ bh = sb_bread(sb, udf_get_lb_pblock(sb, &loc, block));
+ bitmap->s_block_bitmap[bitmap_nr] = bh;
if (!bh)
- retval = -EIO;
+ return -EIO;
- bitmap->s_block_bitmap[bitmap_nr] = bh;
- return retval;
+ /* Check consistency of Space Bitmap buffer. */
+ max_bits = sb->s_blocksize * 8;
+ if (!bitmap_nr) {
+ off = sizeof(struct spaceBitmapDesc) << 3;
+ count = min(max_bits - off, bitmap->s_nr_groups);
+ } else {
+ /*
+ * Rough check if bitmap number is too big to have any bitmap
+ * blocks reserved.
+ */
+ if (bitmap_nr >
+ (bitmap->s_nr_groups >> (sb->s_blocksize_bits + 3)) + 2)
+ return 0;
+ off = 0;
+ count = bitmap->s_nr_groups - bitmap_nr * max_bits +
+ (sizeof(struct spaceBitmapDesc) << 3);
+ count = min(count, max_bits);
+ }
+
+ for (i = 0; i < count; i++)
+ if (udf_test_bit(i + off, bh->b_data)) {
+ bitmap->s_block_bitmap[bitmap_nr] =
+ ERR_PTR(-EFSCORRUPTED);
+ brelse(bh);
+ return -EFSCORRUPTED;
+ }
+ return 0;
}
-static int __load_block_bitmap(struct super_block *sb,
- struct udf_bitmap *bitmap,
- unsigned int block_group)
+static int load_block_bitmap(struct super_block *sb,
+ struct udf_bitmap *bitmap,
+ unsigned int block_group)
{
int retval = 0;
int nr_groups = bitmap->s_nr_groups;
if (block_group >= nr_groups) {
- udf_debug("block_group (%d) > nr_groups (%d)\n",
+ udf_debug("block_group (%u) > nr_groups (%d)\n",
block_group, nr_groups);
}
if (bitmap->s_block_bitmap[block_group]) {
- return block_group;
- } else {
- retval = read_block_bitmap(sb, bitmap, block_group,
- block_group);
- if (retval < 0)
- return retval;
+ /*
+ * The bitmap failed verification in the past. No point in
+ * trying again.
+ */
+ if (IS_ERR(bitmap->s_block_bitmap[block_group]))
+ return PTR_ERR(bitmap->s_block_bitmap[block_group]);
return block_group;
}
-}
-
-static inline int load_block_bitmap(struct super_block *sb,
- struct udf_bitmap *bitmap,
- unsigned int block_group)
-{
- int slot;
-
- slot = __load_block_bitmap(sb, bitmap, block_group);
- if (slot < 0)
- return slot;
+ retval = read_block_bitmap(sb, bitmap, block_group, block_group);
+ if (retval < 0)
+ return retval;
- if (!bitmap->s_block_bitmap[slot])
- return -EIO;
-
- return slot;
+ return block_group;
}
static void udf_add_free_space(struct super_block *sb, u16 partition, u32 cnt)
@@ -112,7 +124,6 @@ static void udf_bitmap_free_blocks(struct super_block *sb,
{
struct udf_sb_info *sbi = UDF_SB(sb);
struct buffer_head *bh = NULL;
- struct udf_part_map *partmap;
unsigned long block;
unsigned long block_group;
unsigned long bit;
@@ -121,19 +132,9 @@ static void udf_bitmap_free_blocks(struct super_block *sb,
unsigned long overflow;
mutex_lock(&sbi->s_alloc_mutex);
- partmap = &sbi->s_partmaps[bloc->partitionReferenceNum];
- if (bloc->logicalBlockNum + count < count ||
- (bloc->logicalBlockNum + count) > partmap->s_partition_len) {
- udf_debug("%d < %d || %d + %d > %d\n",
- bloc->logicalBlockNum, 0,
- bloc->logicalBlockNum, count,
- partmap->s_partition_len);
- goto error_return;
- }
-
+ /* We make sure this cannot overflow when mounting the filesystem */
block = bloc->logicalBlockNum + offset +
(sizeof(struct spaceBitmapDesc) << 3);
-
do {
overflow = 0;
block_group = block >> (sb->s_blocksize_bits + 3);
@@ -153,9 +154,9 @@ static void udf_bitmap_free_blocks(struct super_block *sb,
bh = bitmap->s_block_bitmap[bitmap_nr];
for (i = 0; i < count; i++) {
if (udf_set_bit(bit + i, bh->b_data)) {
- udf_debug("bit %ld already set\n", bit + i);
+ udf_debug("bit %lu already set\n", bit + i);
udf_debug("byte=%2x\n",
- ((char *)bh->b_data)[(bit + i) >> 3]);
+ ((__u8 *)bh->b_data)[(bit + i) >> 3]);
}
}
udf_add_free_space(sb, sbi->s_partition, count);
@@ -177,8 +178,8 @@ static int udf_bitmap_prealloc_blocks(struct super_block *sb,
{
struct udf_sb_info *sbi = UDF_SB(sb);
int alloc_count = 0;
- int bit, block, block_group, group_start;
- int nr_groups, bitmap_nr;
+ int bit, block, block_group;
+ int bitmap_nr;
struct buffer_head *bh;
__u32 part_len;
@@ -191,10 +192,8 @@ static int udf_bitmap_prealloc_blocks(struct super_block *sb,
block_count = part_len - first_block;
do {
- nr_groups = udf_compute_nr_groups(sb, partition);
block = first_block + (sizeof(struct spaceBitmapDesc) << 3);
block_group = block >> (sb->s_blocksize_bits + 3);
- group_start = block_group ? 0 : sizeof(struct spaceBitmapDesc);
bitmap_nr = load_block_bitmap(sb, bitmap, block_group);
if (bitmap_nr < 0)
@@ -220,16 +219,18 @@ out:
return alloc_count;
}
-static int udf_bitmap_new_block(struct super_block *sb,
+static udf_pblk_t udf_bitmap_new_block(struct super_block *sb,
struct udf_bitmap *bitmap, uint16_t partition,
uint32_t goal, int *err)
{
struct udf_sb_info *sbi = UDF_SB(sb);
- int newbit, bit = 0, block, block_group, group_start;
+ int newbit, bit = 0;
+ udf_pblk_t block;
+ int block_group, group_start;
int end_goal, nr_groups, bitmap_nr, i;
struct buffer_head *bh = NULL;
char *ptr;
- int newblock = 0;
+ udf_pblk_t newblock = 0;
*err = -ENOSPC;
mutex_lock(&sbi->s_alloc_mutex);
@@ -327,6 +328,17 @@ got_block:
newblock = bit + (block_group << (sb->s_blocksize_bits + 3)) -
(sizeof(struct spaceBitmapDesc) << 3);
+ if (newblock >= sbi->s_partmaps[partition].s_partition_len) {
+ /*
+ * Ran off the end of the bitmap, and bits following are
+ * non-compliant (not all zero)
+ */
+ udf_err(sb, "bitmap for partition %d corrupted (block %u marked"
+ " as free, partition length is %u)\n", partition,
+ newblock, sbi->s_partmaps[partition].s_partition_len);
+ goto error_return;
+ }
+
if (!udf_clear_bit(bit, bh->b_data)) {
udf_debug("bit already cleared for block %d\n", bit);
goto repeat;
@@ -352,26 +364,15 @@ static void udf_table_free_blocks(struct super_block *sb,
uint32_t count)
{
struct udf_sb_info *sbi = UDF_SB(sb);
- struct udf_part_map *partmap;
uint32_t start, end;
uint32_t elen;
struct kernel_lb_addr eloc;
struct extent_position oepos, epos;
int8_t etype;
- int i;
struct udf_inode_info *iinfo;
+ int ret = 0;
mutex_lock(&sbi->s_alloc_mutex);
- partmap = &sbi->s_partmaps[bloc->partitionReferenceNum];
- if (bloc->logicalBlockNum + count < count ||
- (bloc->logicalBlockNum + count) > partmap->s_partition_len) {
- udf_debug("%d < %d || %d + %d > %d\n",
- bloc->logicalBlockNum, 0,
- bloc->logicalBlockNum, count,
- partmap->s_partition_len);
- goto error_return;
- }
-
iinfo = UDF_I(table);
udf_add_free_space(sb, sbi->s_partition, count);
@@ -383,8 +384,12 @@ static void udf_table_free_blocks(struct super_block *sb,
epos.block = oepos.block = iinfo->i_location;
epos.bh = oepos.bh = NULL;
- while (count &&
- (etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) {
+ while (count) {
+ ret = udf_next_aext(table, &epos, &eloc, &elen, &etype, 1);
+ if (ret < 0)
+ goto error_return;
+ if (ret == 0)
+ break;
if (((eloc.logicalBlockNum +
(elen >> sb->s_blocksize_bits)) == start)) {
if ((0x3FFFFFFF - elen) <
@@ -425,7 +430,6 @@ static void udf_table_free_blocks(struct super_block *sb,
}
if (epos.bh != oepos.bh) {
- i = -1;
oepos.block = epos.block;
brelse(oepos.bh);
get_bh(epos.bh);
@@ -451,9 +455,6 @@ static void udf_table_free_blocks(struct super_block *sb,
*/
int adsize;
- struct short_ad *sad = NULL;
- struct long_ad *lad = NULL;
- struct allocExtDesc *aed;
eloc.logicalBlockNum = start;
elen = EXT_RECORDED_ALLOCATED |
@@ -463,115 +464,27 @@ static void udf_table_free_blocks(struct super_block *sb,
adsize = sizeof(struct short_ad);
else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
adsize = sizeof(struct long_ad);
- else {
- brelse(oepos.bh);
- brelse(epos.bh);
+ else
goto error_return;
- }
if (epos.offset + (2 * adsize) > sb->s_blocksize) {
- unsigned char *sptr, *dptr;
- int loffset;
-
- brelse(oepos.bh);
- oepos = epos;
-
/* Steal a block from the extent being free'd */
- epos.block.logicalBlockNum = eloc.logicalBlockNum;
+ udf_setup_indirect_aext(table, eloc.logicalBlockNum,
+ &epos);
+
eloc.logicalBlockNum++;
elen -= sb->s_blocksize;
-
- epos.bh = udf_tread(sb,
- udf_get_lb_pblock(sb, &epos.block, 0));
- if (!epos.bh) {
- brelse(oepos.bh);
- goto error_return;
- }
- aed = (struct allocExtDesc *)(epos.bh->b_data);
- aed->previousAllocExtLocation =
- cpu_to_le32(oepos.block.logicalBlockNum);
- if (epos.offset + adsize > sb->s_blocksize) {
- loffset = epos.offset;
- aed->lengthAllocDescs = cpu_to_le32(adsize);
- sptr = iinfo->i_ext.i_data + epos.offset
- - adsize;
- dptr = epos.bh->b_data +
- sizeof(struct allocExtDesc);
- memcpy(dptr, sptr, adsize);
- epos.offset = sizeof(struct allocExtDesc) +
- adsize;
- } else {
- loffset = epos.offset + adsize;
- aed->lengthAllocDescs = cpu_to_le32(0);
- if (oepos.bh) {
- sptr = oepos.bh->b_data + epos.offset;
- aed = (struct allocExtDesc *)
- oepos.bh->b_data;
- le32_add_cpu(&aed->lengthAllocDescs,
- adsize);
- } else {
- sptr = iinfo->i_ext.i_data +
- epos.offset;
- iinfo->i_lenAlloc += adsize;
- mark_inode_dirty(table);
- }
- epos.offset = sizeof(struct allocExtDesc);
- }
- if (sbi->s_udfrev >= 0x0200)
- udf_new_tag(epos.bh->b_data, TAG_IDENT_AED,
- 3, 1, epos.block.logicalBlockNum,
- sizeof(struct tag));
- else
- udf_new_tag(epos.bh->b_data, TAG_IDENT_AED,
- 2, 1, epos.block.logicalBlockNum,
- sizeof(struct tag));
-
- switch (iinfo->i_alloc_type) {
- case ICBTAG_FLAG_AD_SHORT:
- sad = (struct short_ad *)sptr;
- sad->extLength = cpu_to_le32(
- EXT_NEXT_EXTENT_ALLOCDECS |
- sb->s_blocksize);
- sad->extPosition =
- cpu_to_le32(epos.block.logicalBlockNum);
- break;
- case ICBTAG_FLAG_AD_LONG:
- lad = (struct long_ad *)sptr;
- lad->extLength = cpu_to_le32(
- EXT_NEXT_EXTENT_ALLOCDECS |
- sb->s_blocksize);
- lad->extLocation =
- cpu_to_lelb(epos.block);
- break;
- }
- if (oepos.bh) {
- udf_update_tag(oepos.bh->b_data, loffset);
- mark_buffer_dirty(oepos.bh);
- } else {
- mark_inode_dirty(table);
- }
}
/* It's possible that stealing the block emptied the extent */
- if (elen) {
- udf_write_aext(table, &epos, &eloc, elen, 1);
-
- if (!epos.bh) {
- iinfo->i_lenAlloc += adsize;
- mark_inode_dirty(table);
- } else {
- aed = (struct allocExtDesc *)epos.bh->b_data;
- le32_add_cpu(&aed->lengthAllocDescs, adsize);
- udf_update_tag(epos.bh->b_data, epos.offset);
- mark_buffer_dirty(epos.bh);
- }
- }
+ if (elen)
+ __udf_add_aext(table, &epos, &eloc, elen, 1);
}
+error_return:
brelse(epos.bh);
brelse(oepos.bh);
-error_return:
mutex_unlock(&sbi->s_alloc_mutex);
return;
}
@@ -587,6 +500,7 @@ static int udf_table_prealloc_blocks(struct super_block *sb,
struct extent_position epos;
int8_t etype = -1;
struct udf_inode_info *iinfo;
+ int ret = 0;
if (first_block >= sbi->s_partmaps[partition].s_partition_len)
return 0;
@@ -605,11 +519,14 @@ static int udf_table_prealloc_blocks(struct super_block *sb,
epos.bh = NULL;
eloc.logicalBlockNum = 0xFFFFFFFF;
- while (first_block != eloc.logicalBlockNum &&
- (etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) {
- udf_debug("eloc=%d, elen=%d, first_block=%d\n",
+ while (first_block != eloc.logicalBlockNum) {
+ ret = udf_next_aext(table, &epos, &eloc, &elen, &etype, 1);
+ if (ret < 0)
+ goto err_out;
+ if (ret == 0)
+ break;
+ udf_debug("eloc=%u, elen=%u, first_block=%u\n",
eloc.logicalBlockNum, elen, first_block);
- ; /* empty loop body */
}
if (first_block == eloc.logicalBlockNum) {
@@ -623,12 +540,12 @@ static int udf_table_prealloc_blocks(struct super_block *sb,
udf_write_aext(table, &epos, &eloc,
(etype << 30) | elen, 1);
} else
- udf_delete_aext(table, epos, eloc,
- (etype << 30) | elen);
+ udf_delete_aext(table, epos);
} else {
alloc_count = 0;
}
+err_out:
brelse(epos.bh);
if (alloc_count)
@@ -637,18 +554,20 @@ static int udf_table_prealloc_blocks(struct super_block *sb,
return alloc_count;
}
-static int udf_table_new_block(struct super_block *sb,
+static udf_pblk_t udf_table_new_block(struct super_block *sb,
struct inode *table, uint16_t partition,
uint32_t goal, int *err)
{
struct udf_sb_info *sbi = UDF_SB(sb);
uint32_t spread = 0xFFFFFFFF, nspread = 0xFFFFFFFF;
- uint32_t newblock = 0, adsize;
+ udf_pblk_t newblock = 0;
+ uint32_t adsize;
uint32_t elen, goal_elen = 0;
- struct kernel_lb_addr eloc, uninitialized_var(goal_eloc);
+ struct kernel_lb_addr eloc, goal_eloc;
struct extent_position epos, goal_epos;
int8_t etype;
struct udf_inode_info *iinfo = UDF_I(table);
+ int ret = 0;
*err = -ENOSPC;
@@ -672,8 +591,10 @@ static int udf_table_new_block(struct super_block *sb,
epos.block = iinfo->i_location;
epos.bh = goal_epos.bh = NULL;
- while (spread &&
- (etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1) {
+ while (spread) {
+ ret = udf_next_aext(table, &epos, &eloc, &elen, &etype, 1);
+ if (ret <= 0)
+ break;
if (goal >= eloc.logicalBlockNum) {
if (goal < eloc.logicalBlockNum +
(elen >> sb->s_blocksize_bits))
@@ -701,9 +622,11 @@ static int udf_table_new_block(struct super_block *sb,
brelse(epos.bh);
- if (spread == 0xFFFFFFFF) {
+ if (ret < 0 || spread == 0xFFFFFFFF) {
brelse(goal_epos.bh);
mutex_unlock(&sbi->s_alloc_mutex);
+ if (ret < 0)
+ *err = ret;
return 0;
}
@@ -719,7 +642,7 @@ static int udf_table_new_block(struct super_block *sb,
if (goal_elen)
udf_write_aext(table, &goal_epos, &goal_eloc, goal_elen, 1);
else
- udf_delete_aext(table, goal_epos, goal_eloc, goal_elen);
+ udf_delete_aext(table, goal_epos);
brelse(goal_epos.bh);
udf_add_free_space(sb, partition, -1);
@@ -735,6 +658,17 @@ void udf_free_blocks(struct super_block *sb, struct inode *inode,
{
uint16_t partition = bloc->partitionReferenceNum;
struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
+ uint32_t blk;
+
+ if (check_add_overflow(bloc->logicalBlockNum, offset, &blk) ||
+ check_add_overflow(blk, count, &blk) ||
+ bloc->logicalBlockNum + count > map->s_partition_len) {
+ udf_debug("Invalid request to free blocks: (%d, %u), off %u, "
+ "len %u, partition len %u\n",
+ partition, bloc->logicalBlockNum, offset, count,
+ map->s_partition_len);
+ return;
+ }
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
udf_bitmap_free_blocks(sb, map->s_uspace.s_bitmap,
@@ -742,12 +676,6 @@ void udf_free_blocks(struct super_block *sb, struct inode *inode,
} else if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
udf_table_free_blocks(sb, map->s_uspace.s_table,
bloc, offset, count);
- } else if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
- udf_bitmap_free_blocks(sb, map->s_fspace.s_bitmap,
- bloc, offset, count);
- } else if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
- udf_table_free_blocks(sb, map->s_fspace.s_table,
- bloc, offset, count);
}
if (inode) {
@@ -762,7 +690,7 @@ inline int udf_prealloc_blocks(struct super_block *sb,
uint32_t block_count)
{
struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
- sector_t allocated;
+ int allocated;
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
allocated = udf_bitmap_prealloc_blocks(sb,
@@ -774,16 +702,6 @@ inline int udf_prealloc_blocks(struct super_block *sb,
map->s_uspace.s_table,
partition, first_block,
block_count);
- else if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
- allocated = udf_bitmap_prealloc_blocks(sb,
- map->s_fspace.s_bitmap,
- partition, first_block,
- block_count);
- else if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
- allocated = udf_table_prealloc_blocks(sb,
- map->s_fspace.s_table,
- partition, first_block,
- block_count);
else
return 0;
@@ -792,12 +710,12 @@ inline int udf_prealloc_blocks(struct super_block *sb,
return allocated;
}
-inline int udf_new_block(struct super_block *sb,
+inline udf_pblk_t udf_new_block(struct super_block *sb,
struct inode *inode,
uint16_t partition, uint32_t goal, int *err)
{
struct udf_part_map *map = &UDF_SB(sb)->s_partmaps[partition];
- int block;
+ udf_pblk_t block;
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
block = udf_bitmap_new_block(sb,
@@ -807,14 +725,6 @@ inline int udf_new_block(struct super_block *sb,
block = udf_table_new_block(sb,
map->s_uspace.s_table,
partition, goal, err);
- else if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
- block = udf_bitmap_new_block(sb,
- map->s_fspace.s_bitmap,
- partition, goal, err);
- else if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
- block = udf_table_new_block(sb,
- map->s_fspace.s_table,
- partition, goal, err);
else {
*err = -EIO;
return 0;
diff --git a/fs/udf/dir.c b/fs/udf/dir.c
index a012c51caffd..5023dfe191e8 100644
--- a/fs/udf/dir.c
+++ b/fs/udf/dir.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* dir.c
*
@@ -5,11 +6,6 @@
* Directory handling routines for the OSTA-UDF(tm) filesystem.
*
* COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
- *
* (C) 1998-2004 Ben Fennema
*
* HISTORY
@@ -30,33 +26,22 @@
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/slab.h>
-#include <linux/buffer_head.h>
+#include <linux/bio.h>
+#include <linux/iversion.h>
#include "udf_i.h"
#include "udf_sb.h"
-
static int udf_readdir(struct file *file, struct dir_context *ctx)
{
struct inode *dir = file_inode(file);
- struct udf_inode_info *iinfo = UDF_I(dir);
- struct udf_fileident_bh fibh = { .sbh = NULL, .ebh = NULL};
- struct fileIdentDesc *fi = NULL;
- struct fileIdentDesc cfi;
- int block, iblock;
- loff_t nf_pos;
+ loff_t nf_pos, emit_pos = 0;
int flen;
unsigned char *fname = NULL;
- unsigned char *nameptr;
- uint16_t liu;
- uint8_t lfi;
- loff_t size = udf_ext0_offset(dir) + dir->i_size;
- struct buffer_head *tmp, *bha[16];
- struct kernel_lb_addr eloc;
- uint32_t elen;
- sector_t offset;
- int i, num, ret = 0;
- struct extent_position epos = { NULL, 0, {0, 0} };
+ int ret = 0;
+ struct super_block *sb = dir->i_sb;
+ bool pos_valid = false;
+ struct udf_fileident_iter iter;
if (ctx->pos == 0) {
if (!dir_emit_dot(file, ctx))
@@ -64,136 +49,112 @@ static int udf_readdir(struct file *file, struct dir_context *ctx)
ctx->pos = 1;
}
nf_pos = (ctx->pos - 1) << 2;
- if (nf_pos >= size)
+ if (nf_pos >= dir->i_size)
goto out;
- fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
+ /*
+ * Something changed since last readdir (either lseek was called or dir
+ * changed)? We need to verify the position correctly points at the
+ * beginning of some dir entry so that the directory parsing code does
+ * not get confused. Since UDF does not have any reliable way of
+ * identifying beginning of dir entry (names are under user control),
+ * we need to scan the directory from the beginning.
+ */
+ if (!inode_eq_iversion(dir, *(u64 *)file->private_data)) {
+ emit_pos = nf_pos;
+ nf_pos = 0;
+ } else {
+ pos_valid = true;
+ }
+
+ fname = kmalloc(UDF_NAME_LEN, GFP_KERNEL);
if (!fname) {
ret = -ENOMEM;
goto out;
}
- if (nf_pos == 0)
- nf_pos = udf_ext0_offset(dir);
-
- fibh.soffset = fibh.eoffset = nf_pos & (dir->i_sb->s_blocksize - 1);
- if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
- if (inode_bmap(dir, nf_pos >> dir->i_sb->s_blocksize_bits,
- &epos, &eloc, &elen, &offset)
- != (EXT_RECORDED_ALLOCATED >> 30)) {
- ret = -ENOENT;
- goto out;
- }
- block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
- if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
- if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- epos.offset -= sizeof(struct short_ad);
- else if (iinfo->i_alloc_type ==
- ICBTAG_FLAG_AD_LONG)
- epos.offset -= sizeof(struct long_ad);
- } else {
- offset = 0;
- }
-
- if (!(fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block))) {
- ret = -EIO;
- goto out;
- }
-
- if (!(offset & ((16 >> (dir->i_sb->s_blocksize_bits - 9)) - 1))) {
- i = 16 >> (dir->i_sb->s_blocksize_bits - 9);
- if (i + offset > (elen >> dir->i_sb->s_blocksize_bits))
- i = (elen >> dir->i_sb->s_blocksize_bits) - offset;
- for (num = 0; i > 0; i--) {
- block = udf_get_lb_pblock(dir->i_sb, &eloc, offset + i);
- tmp = udf_tgetblk(dir->i_sb, block);
- if (tmp && !buffer_uptodate(tmp) && !buffer_locked(tmp))
- bha[num++] = tmp;
- else
- brelse(tmp);
- }
- if (num) {
- ll_rw_block(READA, num, bha);
- for (i = 0; i < num; i++)
- brelse(bha[i]);
- }
- }
- }
-
- while (nf_pos < size) {
+ for (ret = udf_fiiter_init(&iter, dir, nf_pos);
+ !ret && iter.pos < dir->i_size;
+ ret = udf_fiiter_advance(&iter)) {
struct kernel_lb_addr tloc;
+ udf_pblk_t iblock;
- ctx->pos = (nf_pos >> 2) + 1;
-
- fi = udf_fileident_read(dir, &nf_pos, &fibh, &cfi, &epos, &eloc,
- &elen, &offset);
- if (!fi)
- goto out;
-
- liu = le16_to_cpu(cfi.lengthOfImpUse);
- lfi = cfi.lengthFileIdent;
-
- if (fibh.sbh == fibh.ebh) {
- nameptr = fi->fileIdent + liu;
- } else {
- int poffset; /* Unpaded ending offset */
-
- poffset = fibh.soffset + sizeof(struct fileIdentDesc) + liu + lfi;
+ /* Still not at offset where user asked us to read from? */
+ if (iter.pos < emit_pos)
+ continue;
- if (poffset >= lfi) {
- nameptr = (char *)(fibh.ebh->b_data + poffset - lfi);
- } else {
- nameptr = fname;
- memcpy(nameptr, fi->fileIdent + liu,
- lfi - poffset);
- memcpy(nameptr + lfi - poffset,
- fibh.ebh->b_data, poffset);
- }
- }
+ /* Update file position only if we got past the current one */
+ pos_valid = true;
+ ctx->pos = (iter.pos >> 2) + 1;
- if ((cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
- if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
+ if (iter.fi.fileCharacteristics & FID_FILE_CHAR_DELETED) {
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
continue;
}
- if ((cfi.fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
- if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
+ if (iter.fi.fileCharacteristics & FID_FILE_CHAR_HIDDEN) {
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
continue;
}
- if (cfi.fileCharacteristics & FID_FILE_CHAR_PARENT) {
+ if (iter.fi.fileCharacteristics & FID_FILE_CHAR_PARENT) {
if (!dir_emit_dotdot(file, ctx))
- goto out;
+ goto out_iter;
continue;
}
- flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
- if (!flen)
+ flen = udf_get_filename(sb, iter.name,
+ iter.fi.lengthFileIdent, fname, UDF_NAME_LEN);
+ if (flen < 0)
continue;
- tloc = lelb_to_cpu(cfi.icb.extLocation);
- iblock = udf_get_lb_pblock(dir->i_sb, &tloc, 0);
+ tloc = lelb_to_cpu(iter.fi.icb.extLocation);
+ iblock = udf_get_lb_pblock(sb, &tloc, 0);
if (!dir_emit(ctx, fname, flen, iblock, DT_UNKNOWN))
- goto out;
- } /* end while */
-
- ctx->pos = (nf_pos >> 2) + 1;
+ goto out_iter;
+ }
+ if (!ret) {
+ ctx->pos = (iter.pos >> 2) + 1;
+ pos_valid = true;
+ }
+out_iter:
+ udf_fiiter_release(&iter);
out:
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
- brelse(epos.bh);
+ if (pos_valid)
+ *(u64 *)file->private_data = inode_query_iversion(dir);
kfree(fname);
return ret;
}
+static int udf_dir_open(struct inode *inode, struct file *file)
+{
+ file->private_data = kzalloc(sizeof(u64), GFP_KERNEL);
+ if (!file->private_data)
+ return -ENOMEM;
+ return 0;
+}
+
+static int udf_dir_release(struct inode *inode, struct file *file)
+{
+ kfree(file->private_data);
+ return 0;
+}
+
+static loff_t udf_dir_llseek(struct file *file, loff_t offset, int whence)
+{
+ return generic_llseek_cookie(file, offset, whence,
+ (u64 *)file->private_data);
+}
+
/* readdir and lookup functions */
const struct file_operations udf_dir_operations = {
- .llseek = generic_file_llseek,
+ .open = udf_dir_open,
+ .release = udf_dir_release,
+ .llseek = udf_dir_llseek,
.read = generic_read_dir,
- .iterate = udf_readdir,
+ .iterate_shared = udf_readdir,
.unlocked_ioctl = udf_ioctl,
.fsync = generic_file_fsync,
};
diff --git a/fs/udf/directory.c b/fs/udf/directory.c
index 3e44f575fb9c..632453aa3893 100644
--- a/fs/udf/directory.c
+++ b/fs/udf/directory.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* directory.c
*
* PURPOSE
* Directory related functions
*
- * COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
*/
#include "udfdecl.h"
@@ -16,183 +12,488 @@
#include <linux/fs.h>
#include <linux/string.h>
-#include <linux/buffer_head.h>
+#include <linux/bio.h>
+#include <linux/crc-itu-t.h>
+#include <linux/iversion.h>
-struct fileIdentDesc *udf_fileident_read(struct inode *dir, loff_t *nf_pos,
- struct udf_fileident_bh *fibh,
- struct fileIdentDesc *cfi,
- struct extent_position *epos,
- struct kernel_lb_addr *eloc, uint32_t *elen,
- sector_t *offset)
+static int udf_verify_fi(struct udf_fileident_iter *iter)
{
- struct fileIdentDesc *fi;
- int i, num, block;
- struct buffer_head *tmp, *bha[16];
- struct udf_inode_info *iinfo = UDF_I(dir);
-
- fibh->soffset = fibh->eoffset;
+ unsigned int len;
+
+ if (iter->fi.descTag.tagIdent != cpu_to_le16(TAG_IDENT_FID)) {
+ udf_err(iter->dir->i_sb,
+ "directory (ino %lu) has entry at pos %llu with incorrect tag %x\n",
+ iter->dir->i_ino, (unsigned long long)iter->pos,
+ le16_to_cpu(iter->fi.descTag.tagIdent));
+ return -EFSCORRUPTED;
+ }
+ len = udf_dir_entry_len(&iter->fi);
+ if (le16_to_cpu(iter->fi.lengthOfImpUse) & 3) {
+ udf_err(iter->dir->i_sb,
+ "directory (ino %lu) has entry at pos %llu with unaligned length of impUse field\n",
+ iter->dir->i_ino, (unsigned long long)iter->pos);
+ return -EFSCORRUPTED;
+ }
+ /*
+ * This is in fact allowed by the spec due to long impUse field but
+ * we don't support it. If there is real media with this large impUse
+ * field, support can be added.
+ */
+ if (len > 1 << iter->dir->i_blkbits) {
+ udf_err(iter->dir->i_sb,
+ "directory (ino %lu) has too big (%u) entry at pos %llu\n",
+ iter->dir->i_ino, len, (unsigned long long)iter->pos);
+ return -EFSCORRUPTED;
+ }
+ if (iter->pos + len > iter->dir->i_size) {
+ udf_err(iter->dir->i_sb,
+ "directory (ino %lu) has entry past directory size at pos %llu\n",
+ iter->dir->i_ino, (unsigned long long)iter->pos);
+ return -EFSCORRUPTED;
+ }
+ if (udf_dir_entry_len(&iter->fi) !=
+ sizeof(struct tag) + le16_to_cpu(iter->fi.descTag.descCRCLength)) {
+ udf_err(iter->dir->i_sb,
+ "directory (ino %lu) has entry where CRC length (%u) does not match entry length (%u)\n",
+ iter->dir->i_ino,
+ (unsigned)le16_to_cpu(iter->fi.descTag.descCRCLength),
+ (unsigned)(udf_dir_entry_len(&iter->fi) -
+ sizeof(struct tag)));
+ return -EFSCORRUPTED;
+ }
+ return 0;
+}
+static int udf_copy_fi(struct udf_fileident_iter *iter)
+{
+ struct udf_inode_info *iinfo = UDF_I(iter->dir);
+ u32 blksize = 1 << iter->dir->i_blkbits;
+ u32 off, len, nameoff;
+ int err;
+
+ /* Skip copying when we are at EOF */
+ if (iter->pos >= iter->dir->i_size) {
+ iter->name = NULL;
+ return 0;
+ }
+ if (iter->dir->i_size < iter->pos + sizeof(struct fileIdentDesc)) {
+ udf_err(iter->dir->i_sb,
+ "directory (ino %lu) has entry straddling EOF\n",
+ iter->dir->i_ino);
+ return -EFSCORRUPTED;
+ }
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
- fi = udf_get_fileident(iinfo->i_ext.i_data -
- (iinfo->i_efe ?
- sizeof(struct extendedFileEntry) :
- sizeof(struct fileEntry)),
- dir->i_sb->s_blocksize,
- &(fibh->eoffset));
- if (!fi)
- return NULL;
-
- *nf_pos += fibh->eoffset - fibh->soffset;
-
- memcpy((uint8_t *)cfi, (uint8_t *)fi,
+ memcpy(&iter->fi, iinfo->i_data + iinfo->i_lenEAttr + iter->pos,
sizeof(struct fileIdentDesc));
+ err = udf_verify_fi(iter);
+ if (err < 0)
+ return err;
+ iter->name = iinfo->i_data + iinfo->i_lenEAttr + iter->pos +
+ sizeof(struct fileIdentDesc) +
+ le16_to_cpu(iter->fi.lengthOfImpUse);
+ return 0;
+ }
- return fi;
+ off = iter->pos & (blksize - 1);
+ len = min_t(u32, sizeof(struct fileIdentDesc), blksize - off);
+ memcpy(&iter->fi, iter->bh[0]->b_data + off, len);
+ if (len < sizeof(struct fileIdentDesc))
+ memcpy((char *)(&iter->fi) + len, iter->bh[1]->b_data,
+ sizeof(struct fileIdentDesc) - len);
+ err = udf_verify_fi(iter);
+ if (err < 0)
+ return err;
+
+ /* Handle directory entry name */
+ nameoff = off + sizeof(struct fileIdentDesc) +
+ le16_to_cpu(iter->fi.lengthOfImpUse);
+ if (off + udf_dir_entry_len(&iter->fi) <= blksize) {
+ iter->name = iter->bh[0]->b_data + nameoff;
+ } else if (nameoff >= blksize) {
+ iter->name = iter->bh[1]->b_data + (nameoff - blksize);
+ } else {
+ iter->name = iter->namebuf;
+ len = blksize - nameoff;
+ memcpy(iter->name, iter->bh[0]->b_data + nameoff, len);
+ memcpy(iter->name + len, iter->bh[1]->b_data,
+ iter->fi.lengthFileIdent - len);
}
+ return 0;
+}
- if (fibh->eoffset == dir->i_sb->s_blocksize) {
- int lextoffset = epos->offset;
- unsigned char blocksize_bits = dir->i_sb->s_blocksize_bits;
+/* Readahead 8k once we are at 8k boundary */
+static void udf_readahead_dir(struct udf_fileident_iter *iter)
+{
+ unsigned int ralen = 16 >> (iter->dir->i_blkbits - 9);
+ struct buffer_head *tmp, *bha[16];
+ int i, num;
+ udf_pblk_t blk;
+
+ if (iter->loffset & (ralen - 1))
+ return;
+
+ if (iter->loffset + ralen > (iter->elen >> iter->dir->i_blkbits))
+ ralen = (iter->elen >> iter->dir->i_blkbits) - iter->loffset;
+ num = 0;
+ for (i = 0; i < ralen; i++) {
+ blk = udf_get_lb_pblock(iter->dir->i_sb, &iter->eloc,
+ iter->loffset + i);
+ tmp = sb_getblk(iter->dir->i_sb, blk);
+ if (tmp && !buffer_uptodate(tmp) && !buffer_locked(tmp))
+ bha[num++] = tmp;
+ else
+ brelse(tmp);
+ }
+ if (num) {
+ bh_readahead_batch(num, bha, REQ_RAHEAD);
+ for (i = 0; i < num; i++)
+ brelse(bha[i]);
+ }
+}
- if (udf_next_aext(dir, epos, eloc, elen, 1) !=
- (EXT_RECORDED_ALLOCATED >> 30))
- return NULL;
+static struct buffer_head *udf_fiiter_bread_blk(struct udf_fileident_iter *iter)
+{
+ udf_pblk_t blk;
- block = udf_get_lb_pblock(dir->i_sb, eloc, *offset);
+ udf_readahead_dir(iter);
+ blk = udf_get_lb_pblock(iter->dir->i_sb, &iter->eloc, iter->loffset);
+ return sb_bread(iter->dir->i_sb, blk);
+}
- (*offset)++;
+/*
+ * Updates loffset to point to next directory block; eloc, elen & epos are
+ * updated if we need to traverse to the next extent as well.
+ */
+static int udf_fiiter_advance_blk(struct udf_fileident_iter *iter)
+{
+ int8_t etype = -1;
+ int err = 0;
+
+ iter->loffset++;
+ if (iter->loffset < DIV_ROUND_UP(iter->elen, 1<<iter->dir->i_blkbits))
+ return 0;
+
+ iter->loffset = 0;
+ err = udf_next_aext(iter->dir, &iter->epos, &iter->eloc,
+ &iter->elen, &etype, 1);
+ if (err < 0)
+ return err;
+ else if (err == 0 || etype != (EXT_RECORDED_ALLOCATED >> 30)) {
+ if (iter->pos == iter->dir->i_size) {
+ iter->elen = 0;
+ return 0;
+ }
+ udf_err(iter->dir->i_sb,
+ "extent after position %llu not allocated in directory (ino %lu)\n",
+ (unsigned long long)iter->pos, iter->dir->i_ino);
+ return -EFSCORRUPTED;
+ }
+ return 0;
+}
- if ((*offset << blocksize_bits) >= *elen)
- *offset = 0;
- else
- epos->offset = lextoffset;
+static int udf_fiiter_load_bhs(struct udf_fileident_iter *iter)
+{
+ int blksize = 1 << iter->dir->i_blkbits;
+ int off = iter->pos & (blksize - 1);
+ int err;
+ struct fileIdentDesc *fi;
- brelse(fibh->sbh);
- fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
- if (!fibh->sbh)
- return NULL;
- fibh->soffset = fibh->eoffset = 0;
-
- if (!(*offset & ((16 >> (blocksize_bits - 9)) - 1))) {
- i = 16 >> (blocksize_bits - 9);
- if (i + *offset > (*elen >> blocksize_bits))
- i = (*elen >> blocksize_bits)-*offset;
- for (num = 0; i > 0; i--) {
- block = udf_get_lb_pblock(dir->i_sb, eloc,
- *offset + i);
- tmp = udf_tgetblk(dir->i_sb, block);
- if (tmp && !buffer_uptodate(tmp) &&
- !buffer_locked(tmp))
- bha[num++] = tmp;
- else
- brelse(tmp);
- }
- if (num) {
- ll_rw_block(READA, num, bha);
- for (i = 0; i < num; i++)
- brelse(bha[i]);
- }
+ /* Is there any further extent we can map from? */
+ if (!iter->bh[0] && iter->elen) {
+ iter->bh[0] = udf_fiiter_bread_blk(iter);
+ if (!iter->bh[0]) {
+ err = -ENOMEM;
+ goto out_brelse;
+ }
+ if (!buffer_uptodate(iter->bh[0])) {
+ err = -EIO;
+ goto out_brelse;
}
- } else if (fibh->sbh != fibh->ebh) {
- brelse(fibh->sbh);
- fibh->sbh = fibh->ebh;
}
+ /* There's no next block so we are done */
+ if (iter->pos >= iter->dir->i_size)
+ return 0;
+ /* Need to fetch next block as well? */
+ if (off + sizeof(struct fileIdentDesc) > blksize)
+ goto fetch_next;
+ fi = (struct fileIdentDesc *)(iter->bh[0]->b_data + off);
+ /* Need to fetch next block to get name? */
+ if (off + udf_dir_entry_len(fi) > blksize) {
+fetch_next:
+ err = udf_fiiter_advance_blk(iter);
+ if (err)
+ goto out_brelse;
+ iter->bh[1] = udf_fiiter_bread_blk(iter);
+ if (!iter->bh[1]) {
+ err = -ENOMEM;
+ goto out_brelse;
+ }
+ if (!buffer_uptodate(iter->bh[1])) {
+ err = -EIO;
+ goto out_brelse;
+ }
+ }
+ return 0;
+out_brelse:
+ brelse(iter->bh[0]);
+ brelse(iter->bh[1]);
+ iter->bh[0] = iter->bh[1] = NULL;
+ return err;
+}
- fi = udf_get_fileident(fibh->sbh->b_data, dir->i_sb->s_blocksize,
- &(fibh->eoffset));
+int udf_fiiter_init(struct udf_fileident_iter *iter, struct inode *dir,
+ loff_t pos)
+{
+ struct udf_inode_info *iinfo = UDF_I(dir);
+ int err = 0;
+ int8_t etype;
+
+ iter->dir = dir;
+ iter->bh[0] = iter->bh[1] = NULL;
+ iter->pos = pos;
+ iter->elen = 0;
+ iter->epos.bh = NULL;
+ iter->name = NULL;
+ /*
+ * When directory is verified, we don't expect directory iteration to
+ * fail and it can be difficult to undo without corrupting filesystem.
+ * So just do not allow memory allocation failures here.
+ */
+ iter->namebuf = kmalloc(UDF_NAME_LEN_CS0, GFP_KERNEL | __GFP_NOFAIL);
- if (!fi)
- return NULL;
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+ err = udf_copy_fi(iter);
+ goto out;
+ }
- *nf_pos += fibh->eoffset - fibh->soffset;
+ err = inode_bmap(dir, iter->pos >> dir->i_blkbits, &iter->epos,
+ &iter->eloc, &iter->elen, &iter->loffset, &etype);
+ if (err <= 0 || etype != (EXT_RECORDED_ALLOCATED >> 30)) {
+ if (pos == dir->i_size)
+ return 0;
+ udf_err(dir->i_sb,
+ "position %llu not allocated in directory (ino %lu)\n",
+ (unsigned long long)pos, dir->i_ino);
+ err = -EFSCORRUPTED;
+ goto out;
+ }
+ err = udf_fiiter_load_bhs(iter);
+ if (err < 0)
+ goto out;
+ err = udf_copy_fi(iter);
+out:
+ if (err < 0)
+ udf_fiiter_release(iter);
+ return err;
+}
- if (fibh->eoffset <= dir->i_sb->s_blocksize) {
- memcpy((uint8_t *)cfi, (uint8_t *)fi,
- sizeof(struct fileIdentDesc));
- } else if (fibh->eoffset > dir->i_sb->s_blocksize) {
- int lextoffset = epos->offset;
+int udf_fiiter_advance(struct udf_fileident_iter *iter)
+{
+ unsigned int oldoff, len;
+ int blksize = 1 << iter->dir->i_blkbits;
+ int err;
+
+ oldoff = iter->pos & (blksize - 1);
+ len = udf_dir_entry_len(&iter->fi);
+ iter->pos += len;
+ if (UDF_I(iter->dir)->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
+ if (oldoff + len >= blksize) {
+ brelse(iter->bh[0]);
+ iter->bh[0] = NULL;
+ /* Next block already loaded? */
+ if (iter->bh[1]) {
+ iter->bh[0] = iter->bh[1];
+ iter->bh[1] = NULL;
+ } else {
+ err = udf_fiiter_advance_blk(iter);
+ if (err < 0)
+ return err;
+ }
+ }
+ err = udf_fiiter_load_bhs(iter);
+ if (err < 0)
+ return err;
+ }
+ return udf_copy_fi(iter);
+}
- if (udf_next_aext(dir, epos, eloc, elen, 1) !=
- (EXT_RECORDED_ALLOCATED >> 30))
- return NULL;
+void udf_fiiter_release(struct udf_fileident_iter *iter)
+{
+ iter->dir = NULL;
+ brelse(iter->bh[0]);
+ brelse(iter->bh[1]);
+ iter->bh[0] = iter->bh[1] = NULL;
+ kfree(iter->namebuf);
+ iter->namebuf = NULL;
+}
- block = udf_get_lb_pblock(dir->i_sb, eloc, *offset);
+static void udf_copy_to_bufs(void *buf1, int len1, void *buf2, int len2,
+ int off, void *src, int len)
+{
+ int copy;
+
+ if (off >= len1) {
+ off -= len1;
+ } else {
+ copy = min(off + len, len1) - off;
+ memcpy(buf1 + off, src, copy);
+ src += copy;
+ len -= copy;
+ off = 0;
+ }
+ if (len > 0) {
+ if (WARN_ON_ONCE(off + len > len2 || !buf2))
+ return;
+ memcpy(buf2 + off, src, len);
+ }
+}
- (*offset)++;
+static uint16_t udf_crc_fi_bufs(void *buf1, int len1, void *buf2, int len2,
+ int off, int len)
+{
+ int copy;
+ uint16_t crc = 0;
+
+ if (off >= len1) {
+ off -= len1;
+ } else {
+ copy = min(off + len, len1) - off;
+ crc = crc_itu_t(crc, buf1 + off, copy);
+ len -= copy;
+ off = 0;
+ }
+ if (len > 0) {
+ if (WARN_ON_ONCE(off + len > len2 || !buf2))
+ return 0;
+ crc = crc_itu_t(crc, buf2 + off, len);
+ }
+ return crc;
+}
- if ((*offset << dir->i_sb->s_blocksize_bits) >= *elen)
- *offset = 0;
- else
- epos->offset = lextoffset;
+static void udf_copy_fi_to_bufs(char *buf1, int len1, char *buf2, int len2,
+ int off, struct fileIdentDesc *fi,
+ uint8_t *impuse, uint8_t *name)
+{
+ uint16_t crc;
+ int fioff = off;
+ int crcoff = off + sizeof(struct tag);
+ unsigned int crclen = udf_dir_entry_len(fi) - sizeof(struct tag);
+ char zeros[UDF_NAME_PAD] = {};
+ int endoff = off + udf_dir_entry_len(fi);
+
+ udf_copy_to_bufs(buf1, len1, buf2, len2, off, fi,
+ sizeof(struct fileIdentDesc));
+ off += sizeof(struct fileIdentDesc);
+ if (impuse)
+ udf_copy_to_bufs(buf1, len1, buf2, len2, off, impuse,
+ le16_to_cpu(fi->lengthOfImpUse));
+ off += le16_to_cpu(fi->lengthOfImpUse);
+ if (name) {
+ udf_copy_to_bufs(buf1, len1, buf2, len2, off, name,
+ fi->lengthFileIdent);
+ off += fi->lengthFileIdent;
+ udf_copy_to_bufs(buf1, len1, buf2, len2, off, zeros,
+ endoff - off);
+ }
- fibh->soffset -= dir->i_sb->s_blocksize;
- fibh->eoffset -= dir->i_sb->s_blocksize;
+ crc = udf_crc_fi_bufs(buf1, len1, buf2, len2, crcoff, crclen);
+ fi->descTag.descCRC = cpu_to_le16(crc);
+ fi->descTag.descCRCLength = cpu_to_le16(crclen);
+ fi->descTag.tagChecksum = udf_tag_checksum(&fi->descTag);
- fibh->ebh = udf_tread(dir->i_sb, block);
- if (!fibh->ebh)
- return NULL;
+ udf_copy_to_bufs(buf1, len1, buf2, len2, fioff, fi, sizeof(struct tag));
+}
- if (sizeof(struct fileIdentDesc) > -fibh->soffset) {
- int fi_len;
+void udf_fiiter_write_fi(struct udf_fileident_iter *iter, uint8_t *impuse)
+{
+ struct udf_inode_info *iinfo = UDF_I(iter->dir);
+ void *buf1, *buf2 = NULL;
+ int len1, len2 = 0, off;
+ int blksize = 1 << iter->dir->i_blkbits;
- memcpy((uint8_t *)cfi, (uint8_t *)fi, -fibh->soffset);
- memcpy((uint8_t *)cfi - fibh->soffset,
- fibh->ebh->b_data,
- sizeof(struct fileIdentDesc) + fibh->soffset);
+ off = iter->pos & (blksize - 1);
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+ buf1 = iinfo->i_data + iinfo->i_lenEAttr;
+ len1 = iter->dir->i_size;
+ } else {
+ buf1 = iter->bh[0]->b_data;
+ len1 = blksize;
+ if (iter->bh[1]) {
+ buf2 = iter->bh[1]->b_data;
+ len2 = blksize;
+ }
+ }
- fi_len = (sizeof(struct fileIdentDesc) +
- cfi->lengthFileIdent +
- le16_to_cpu(cfi->lengthOfImpUse) + 3) & ~3;
+ udf_copy_fi_to_bufs(buf1, len1, buf2, len2, off, &iter->fi, impuse,
+ iter->name == iter->namebuf ? iter->name : NULL);
- *nf_pos += fi_len - (fibh->eoffset - fibh->soffset);
- fibh->eoffset = fibh->soffset + fi_len;
- } else {
- memcpy((uint8_t *)cfi, (uint8_t *)fi,
- sizeof(struct fileIdentDesc));
- }
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+ mark_inode_dirty(iter->dir);
+ } else {
+ mark_buffer_dirty_inode(iter->bh[0], iter->dir);
+ if (iter->bh[1])
+ mark_buffer_dirty_inode(iter->bh[1], iter->dir);
}
- return fi;
+ inode_inc_iversion(iter->dir);
}
-struct fileIdentDesc *udf_get_fileident(void *buffer, int bufsize, int *offset)
+void udf_fiiter_update_elen(struct udf_fileident_iter *iter, uint32_t new_elen)
{
- struct fileIdentDesc *fi;
- int lengthThisIdent;
- uint8_t *ptr;
- int padlen;
+ struct udf_inode_info *iinfo = UDF_I(iter->dir);
+ int diff = new_elen - iter->elen;
+
+ /* Skip update when we already went past the last extent */
+ if (!iter->elen)
+ return;
+ iter->elen = new_elen;
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+ iter->epos.offset -= sizeof(struct short_ad);
+ else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+ iter->epos.offset -= sizeof(struct long_ad);
+ udf_write_aext(iter->dir, &iter->epos, &iter->eloc, iter->elen, 1);
+ iinfo->i_lenExtents += diff;
+ mark_inode_dirty(iter->dir);
+}
- if ((!buffer) || (!offset)) {
- udf_debug("invalidparms, buffer=%p, offset=%p\n",
- buffer, offset);
- return NULL;
+/* Append new block to directory. @iter is expected to point at EOF */
+int udf_fiiter_append_blk(struct udf_fileident_iter *iter)
+{
+ struct udf_inode_info *iinfo = UDF_I(iter->dir);
+ int blksize = 1 << iter->dir->i_blkbits;
+ struct buffer_head *bh;
+ sector_t block;
+ uint32_t old_elen = iter->elen;
+ int err;
+ int8_t etype;
+
+ if (WARN_ON_ONCE(iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB))
+ return -EINVAL;
+
+ /* Round up last extent in the file */
+ udf_fiiter_update_elen(iter, ALIGN(iter->elen, blksize));
+
+ /* Allocate new block and refresh mapping information */
+ block = iinfo->i_lenExtents >> iter->dir->i_blkbits;
+ bh = udf_bread(iter->dir, block, 1, &err);
+ if (!bh) {
+ udf_fiiter_update_elen(iter, old_elen);
+ return err;
}
-
- ptr = buffer;
-
- if ((*offset > 0) && (*offset < bufsize))
- ptr += *offset;
- fi = (struct fileIdentDesc *)ptr;
- if (fi->descTag.tagIdent != cpu_to_le16(TAG_IDENT_FID)) {
- udf_debug("0x%x != TAG_IDENT_FID\n",
- le16_to_cpu(fi->descTag.tagIdent));
- udf_debug("offset: %u sizeof: %lu bufsize: %u\n",
- *offset, (unsigned long)sizeof(struct fileIdentDesc),
- bufsize);
- return NULL;
+ err = inode_bmap(iter->dir, block, &iter->epos, &iter->eloc, &iter->elen,
+ &iter->loffset, &etype);
+ if (err <= 0 || etype != (EXT_RECORDED_ALLOCATED >> 30)) {
+ udf_err(iter->dir->i_sb,
+ "block %llu not allocated in directory (ino %lu)\n",
+ (unsigned long long)block, iter->dir->i_ino);
+ return -EFSCORRUPTED;
}
- if ((*offset + sizeof(struct fileIdentDesc)) > bufsize)
- lengthThisIdent = sizeof(struct fileIdentDesc);
- else
- lengthThisIdent = sizeof(struct fileIdentDesc) +
- fi->lengthFileIdent + le16_to_cpu(fi->lengthOfImpUse);
-
- /* we need to figure padding, too! */
- padlen = lengthThisIdent % UDF_NAME_PAD;
- if (padlen)
- lengthThisIdent += (UDF_NAME_PAD - padlen);
- *offset = *offset + lengthThisIdent;
-
- return fi;
+ if (!(iter->pos & (blksize - 1))) {
+ brelse(iter->bh[0]);
+ iter->bh[0] = bh;
+ } else {
+ iter->bh[1] = bh;
+ }
+ return 0;
}
struct short_ad *udf_get_fileshortad(uint8_t *ptr, int maxoffset, uint32_t *offset,
diff --git a/fs/udf/ecma_167.h b/fs/udf/ecma_167.h
index 4792b771aa80..415b050b977d 100644
--- a/fs/udf/ecma_167.h
+++ b/fs/udf/ecma_167.h
@@ -2,9 +2,10 @@
* ecma_167.h
*
* This file is based on ECMA-167 3rd edition (June 1997)
- * http://www.ecma.ch
+ * https://www.ecma.ch
*
- * Copyright (c) 2001-2002 Ben Fennema <bfennema@falcon.csc.calpoly.edu>
+ * Copyright (c) 2001-2002 Ben Fennema
+ * Copyright (c) 2017-2019 Pali Rohár <pali@kernel.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -32,16 +33,24 @@
* SUCH DAMAGE.
*/
+/**
+ * @file
+ * ECMA-167r3 defines and structure definitions
+ */
+
#include <linux/types.h>
#ifndef _ECMA_167_H
#define _ECMA_167_H 1
+/* Character sets and coding - d-characters (ECMA 167r3 1/7.2) */
+typedef uint8_t dchars;
+
/* Character set specification (ECMA 167r3 1/7.2.1) */
struct charspec {
uint8_t charSetType;
uint8_t charSetInfo[63];
-} __attribute__ ((packed));
+} __packed;
/* Character Set Type (ECMA 167r3 1/7.2.1.1) */
#define CHARSPEC_TYPE_CS0 0x00 /* (1/7.2.2) */
@@ -54,6 +63,7 @@ struct charspec {
#define CHARSPEC_TYPE_CS7 0x07 /* (1/7.2.9) */
#define CHARSPEC_TYPE_CS8 0x08 /* (1/7.2.10) */
+/* Fixed-length character fields - d-string (EMCA 167r3 1/7.2.12) */
typedef uint8_t dstring;
/* Timestamp (ECMA 167r3 1/7.3) */
@@ -68,7 +78,7 @@ struct timestamp {
uint8_t centiseconds;
uint8_t hundredsOfMicroseconds;
uint8_t microseconds;
-} __attribute__ ((packed));
+} __packed;
/* Type and Time Zone (ECMA 167r3 1/7.3.1) */
#define TIMESTAMP_TYPE_MASK 0xF000
@@ -82,11 +92,11 @@ struct regid {
uint8_t flags;
uint8_t ident[23];
uint8_t identSuffix[8];
-} __attribute__ ((packed));
+} __packed;
/* Flags (ECMA 167r3 1/7.4.1) */
-#define ENTITYID_FLAGS_DIRTY 0x00
-#define ENTITYID_FLAGS_PROTECTED 0x01
+#define ENTITYID_FLAGS_DIRTY 0x01
+#define ENTITYID_FLAGS_PROTECTED 0x02
/* Volume Structure Descriptor (ECMA 167r3 2/9.1) */
#define VSD_STD_ID_LEN 5
@@ -95,7 +105,7 @@ struct volStructDesc {
uint8_t stdIdent[VSD_STD_ID_LEN];
uint8_t structVersion;
uint8_t structData[2041];
-} __attribute__ ((packed));
+} __packed;
/* Standard Identifier (EMCA 167r2 2/9.1.2) */
#define VSD_STD_ID_NSR02 "NSR02" /* (3/9.1) */
@@ -114,7 +124,7 @@ struct beginningExtendedAreaDesc {
uint8_t stdIdent[VSD_STD_ID_LEN];
uint8_t structVersion;
uint8_t structData[2041];
-} __attribute__ ((packed));
+} __packed;
/* Terminating Extended Area Descriptor (ECMA 167r3 2/9.3) */
struct terminatingExtendedAreaDesc {
@@ -122,7 +132,7 @@ struct terminatingExtendedAreaDesc {
uint8_t stdIdent[VSD_STD_ID_LEN];
uint8_t structVersion;
uint8_t structData[2041];
-} __attribute__ ((packed));
+} __packed;
/* Boot Descriptor (ECMA 167r3 2/9.4) */
struct bootDesc {
@@ -140,7 +150,7 @@ struct bootDesc {
__le16 flags;
uint8_t reserved2[32];
uint8_t bootUse[1906];
-} __attribute__ ((packed));
+} __packed;
/* Flags (ECMA 167r3 2/9.4.12) */
#define BOOT_FLAGS_ERASE 0x01
@@ -149,7 +159,7 @@ struct bootDesc {
struct extent_ad {
__le32 extLength;
__le32 extLocation;
-} __attribute__ ((packed));
+} __packed;
struct kernel_extent_ad {
uint32_t extLength;
@@ -166,7 +176,7 @@ struct tag {
__le16 descCRC;
__le16 descCRCLength;
__le32 tagLocation;
-} __attribute__ ((packed));
+} __packed;
/* Tag Identifier (ECMA 167r3 3/7.2.1) */
#define TAG_IDENT_PVD 0x0001
@@ -186,7 +196,14 @@ struct NSRDesc {
uint8_t structVersion;
uint8_t reserved;
uint8_t structData[2040];
-} __attribute__ ((packed));
+} __packed;
+
+/* Generic Descriptor */
+struct genericDesc {
+ struct tag descTag;
+ __le32 volDescSeqNum;
+ uint8_t reserved[492];
+} __packed;
/* Primary Volume Descriptor (ECMA 167r3 3/10.1) */
struct primaryVolDesc {
@@ -212,7 +229,7 @@ struct primaryVolDesc {
__le32 predecessorVolDescSeqLocation;
__le16 flags;
uint8_t reserved[22];
-} __attribute__ ((packed));
+} __packed;
/* Flags (ECMA 167r3 3/10.1.21) */
#define PVD_FLAGS_VSID_COMMON 0x0001
@@ -223,7 +240,7 @@ struct anchorVolDescPtr {
struct extent_ad mainVolDescSeqExt;
struct extent_ad reserveVolDescSeqExt;
uint8_t reserved[480];
-} __attribute__ ((packed));
+} __packed;
/* Volume Descriptor Pointer (ECMA 167r3 3/10.3) */
struct volDescPtr {
@@ -231,7 +248,7 @@ struct volDescPtr {
__le32 volDescSeqNum;
struct extent_ad nextVolDescSeqExt;
uint8_t reserved[484];
-} __attribute__ ((packed));
+} __packed;
/* Implementation Use Volume Descriptor (ECMA 167r3 3/10.4) */
struct impUseVolDesc {
@@ -239,7 +256,7 @@ struct impUseVolDesc {
__le32 volDescSeqNum;
struct regid impIdent;
uint8_t impUse[460];
-} __attribute__ ((packed));
+} __packed;
/* Partition Descriptor (ECMA 167r3 3/10.5) */
struct partitionDesc {
@@ -255,7 +272,7 @@ struct partitionDesc {
struct regid impIdent;
uint8_t impUse[128];
uint8_t reserved[156];
-} __attribute__ ((packed));
+} __packed;
/* Partition Flags (ECMA 167r3 3/10.5.3) */
#define PD_PARTITION_FLAGS_ALLOC 0x0001
@@ -290,19 +307,19 @@ struct logicalVolDesc {
struct regid impIdent;
uint8_t impUse[128];
struct extent_ad integritySeqExt;
- uint8_t partitionMaps[0];
-} __attribute__ ((packed));
+ uint8_t partitionMaps[];
+} __packed;
/* Generic Partition Map (ECMA 167r3 3/10.7.1) */
struct genericPartitionMap {
uint8_t partitionMapType;
uint8_t partitionMapLength;
- uint8_t partitionMapping[0];
-} __attribute__ ((packed));
+ uint8_t partitionMapping[];
+} __packed;
/* Partition Map Type (ECMA 167r3 3/10.7.1.1) */
#define GP_PARTITION_MAP_TYPE_UNDEF 0x00
-#define GP_PARTIITON_MAP_TYPE_1 0x01
+#define GP_PARTITION_MAP_TYPE_1 0x01
#define GP_PARTITION_MAP_TYPE_2 0x02
/* Type 1 Partition Map (ECMA 167r3 3/10.7.2) */
@@ -311,28 +328,28 @@ struct genericPartitionMap1 {
uint8_t partitionMapLength;
__le16 volSeqNum;
__le16 partitionNum;
-} __attribute__ ((packed));
+} __packed;
/* Type 2 Partition Map (ECMA 167r3 3/10.7.3) */
struct genericPartitionMap2 {
uint8_t partitionMapType;
uint8_t partitionMapLength;
uint8_t partitionIdent[62];
-} __attribute__ ((packed));
+} __packed;
/* Unallocated Space Descriptor (ECMA 167r3 3/10.8) */
struct unallocSpaceDesc {
struct tag descTag;
__le32 volDescSeqNum;
__le32 numAllocDescs;
- struct extent_ad allocDescs[0];
-} __attribute__ ((packed));
+ struct extent_ad allocDescs[];
+} __packed;
/* Terminating Descriptor (ECMA 167r3 3/10.9) */
struct terminatingDesc {
struct tag descTag;
uint8_t reserved[496];
-} __attribute__ ((packed));
+} __packed;
/* Logical Volume Integrity Descriptor (ECMA 167r3 3/10.10) */
struct logicalVolIntegrityDesc {
@@ -343,10 +360,10 @@ struct logicalVolIntegrityDesc {
uint8_t logicalVolContentsUse[32];
__le32 numOfPartitions;
__le32 lengthOfImpUse;
- __le32 freeSpaceTable[0];
- __le32 sizeTable[0];
- uint8_t impUse[0];
-} __attribute__ ((packed));
+ __le32 freeSpaceTable[];
+ /* __le32 sizeTable[]; */
+ /* uint8_t impUse[]; */
+} __packed;
/* Integrity Type (ECMA 167r3 3/10.10.3) */
#define LVID_INTEGRITY_TYPE_OPEN 0x00000000
@@ -356,7 +373,7 @@ struct logicalVolIntegrityDesc {
struct lb_addr {
__le32 logicalBlockNum;
__le16 partitionReferenceNum;
-} __attribute__ ((packed));
+} __packed;
/* ... and its in-core analog */
struct kernel_lb_addr {
@@ -368,14 +385,14 @@ struct kernel_lb_addr {
struct short_ad {
__le32 extLength;
__le32 extPosition;
-} __attribute__ ((packed));
+} __packed;
/* Long Allocation Descriptor (ECMA 167r3 4/14.14.2) */
struct long_ad {
__le32 extLength;
struct lb_addr extLocation;
uint8_t impUse[6];
-} __attribute__ ((packed));
+} __packed;
struct kernel_long_ad {
uint32_t extLength;
@@ -389,7 +406,7 @@ struct ext_ad {
__le32 recordedLength;
__le32 informationLength;
struct lb_addr extLocation;
-} __attribute__ ((packed));
+} __packed;
struct kernel_ext_ad {
uint32_t extLength;
@@ -434,7 +451,7 @@ struct fileSetDesc {
struct long_ad nextExt;
struct long_ad streamDirectoryICB;
uint8_t reserved[32];
-} __attribute__ ((packed));
+} __packed;
/* Partition Header Descriptor (ECMA 167r3 4/14.3) */
struct partitionHeaderDesc {
@@ -444,7 +461,7 @@ struct partitionHeaderDesc {
struct short_ad freedSpaceTable;
struct short_ad freedSpaceBitmap;
uint8_t reserved[88];
-} __attribute__ ((packed));
+} __packed;
/* File Identifier Descriptor (ECMA 167r3 4/14.4) */
struct fileIdentDesc {
@@ -454,10 +471,10 @@ struct fileIdentDesc {
uint8_t lengthFileIdent;
struct long_ad icb;
__le16 lengthOfImpUse;
- uint8_t impUse[0];
- uint8_t fileIdent[0];
- uint8_t padding[0];
-} __attribute__ ((packed));
+ /* uint8_t impUse[]; */
+ /* uint8_t fileIdent[]; */
+ /* uint8_t padding[]; */
+} __packed;
/* File Characteristics (ECMA 167r3 4/14.4.3) */
#define FID_FILE_CHAR_HIDDEN 0x01
@@ -471,7 +488,7 @@ struct allocExtDesc {
struct tag descTag;
__le32 previousAllocExtLocation;
__le32 lengthAllocDescs;
-} __attribute__ ((packed));
+} __packed;
/* ICB Tag (ECMA 167r3 4/14.6) */
struct icbtag {
@@ -483,7 +500,7 @@ struct icbtag {
uint8_t fileType;
struct lb_addr parentICBLocation;
__le16 flags;
-} __attribute__ ((packed));
+} __packed;
/* Strategy Type (ECMA 167r3 4/14.6.2) */
#define ICBTAG_STRATEGY_TYPE_UNDEF 0x0000
@@ -531,13 +548,13 @@ struct indirectEntry {
struct tag descTag;
struct icbtag icbTag;
struct long_ad indirectICB;
-} __attribute__ ((packed));
+} __packed;
/* Terminal Entry (ECMA 167r3 4/14.8) */
struct terminalEntry {
struct tag descTag;
struct icbtag icbTag;
-} __attribute__ ((packed));
+} __packed;
/* File Entry (ECMA 167r3 4/14.9) */
struct fileEntry {
@@ -561,9 +578,9 @@ struct fileEntry {
__le64 uniqueID;
__le32 lengthExtendedAttr;
__le32 lengthAllocDescs;
- uint8_t extendedAttr[0];
- uint8_t allocDescs[0];
-} __attribute__ ((packed));
+ uint8_t extendedAttr[];
+ /* uint8_t allocDescs[]; */
+} __packed;
/* Permissions (ECMA 167r3 4/14.9.5) */
#define FE_PERM_O_EXEC 0x00000001U
@@ -607,7 +624,7 @@ struct extendedAttrHeaderDesc {
struct tag descTag;
__le32 impAttrLocation;
__le32 appAttrLocation;
-} __attribute__ ((packed));
+} __packed;
/* Generic Format (ECMA 167r3 4/14.10.2) */
struct genericFormat {
@@ -615,8 +632,8 @@ struct genericFormat {
uint8_t attrSubtype;
uint8_t reserved[3];
__le32 attrLength;
- uint8_t attrData[0];
-} __attribute__ ((packed));
+ uint8_t attrData[];
+} __packed;
/* Character Set Information (ECMA 167r3 4/14.10.3) */
struct charSetInfo {
@@ -626,8 +643,8 @@ struct charSetInfo {
__le32 attrLength;
__le32 escapeSeqLength;
uint8_t charSetType;
- uint8_t escapeSeq[0];
-} __attribute__ ((packed));
+ uint8_t escapeSeq[];
+} __packed;
/* Alternate Permissions (ECMA 167r3 4/14.10.4) */
struct altPerms {
@@ -638,7 +655,7 @@ struct altPerms {
__le16 ownerIdent;
__le16 groupIdent;
__le16 permission;
-} __attribute__ ((packed));
+} __packed;
/* File Times Extended Attribute (ECMA 167r3 4/14.10.5) */
struct fileTimesExtAttr {
@@ -649,7 +666,7 @@ struct fileTimesExtAttr {
__le32 dataLength;
__le32 fileTimeExistence;
uint8_t fileTimes;
-} __attribute__ ((packed));
+} __packed;
/* FileTimeExistence (ECMA 167r3 4/14.10.5.6) */
#define FTE_CREATION 0x00000001
@@ -665,8 +682,8 @@ struct infoTimesExtAttr {
__le32 attrLength;
__le32 dataLength;
__le32 infoTimeExistence;
- uint8_t infoTimes[0];
-} __attribute__ ((packed));
+ uint8_t infoTimes[];
+} __packed;
/* Device Specification (ECMA 167r3 4/14.10.7) */
struct deviceSpec {
@@ -677,8 +694,8 @@ struct deviceSpec {
__le32 impUseLength;
__le32 majorDeviceIdent;
__le32 minorDeviceIdent;
- uint8_t impUse[0];
-} __attribute__ ((packed));
+ uint8_t impUse[];
+} __packed;
/* Implementation Use Extended Attr (ECMA 167r3 4/14.10.8) */
struct impUseExtAttr {
@@ -688,8 +705,8 @@ struct impUseExtAttr {
__le32 attrLength;
__le32 impUseLength;
struct regid impIdent;
- uint8_t impUse[0];
-} __attribute__ ((packed));
+ uint8_t impUse[];
+} __packed;
/* Application Use Extended Attribute (ECMA 167r3 4/14.10.9) */
struct appUseExtAttr {
@@ -699,8 +716,8 @@ struct appUseExtAttr {
__le32 attrLength;
__le32 appUseLength;
struct regid appIdent;
- uint8_t appUse[0];
-} __attribute__ ((packed));
+ uint8_t appUse[];
+} __packed;
#define EXTATTR_CHAR_SET 1
#define EXTATTR_ALT_PERMS 3
@@ -709,22 +726,23 @@ struct appUseExtAttr {
#define EXTATTR_DEV_SPEC 12
#define EXTATTR_IMP_USE 2048
#define EXTATTR_APP_USE 65536
+#define EXTATTR_SUBTYPE 1
/* Unallocated Space Entry (ECMA 167r3 4/14.11) */
struct unallocSpaceEntry {
struct tag descTag;
struct icbtag icbTag;
__le32 lengthAllocDescs;
- uint8_t allocDescs[0];
-} __attribute__ ((packed));
+ uint8_t allocDescs[];
+} __packed;
/* Space Bitmap Descriptor (ECMA 167r3 4/14.12) */
struct spaceBitmapDesc {
struct tag descTag;
__le32 numOfBits;
__le32 numOfBytes;
- uint8_t bitmap[0];
-} __attribute__ ((packed));
+ uint8_t bitmap[];
+} __packed;
/* Partition Integrity Entry (ECMA 167r3 4/14.13) */
struct partitionIntegrityEntry {
@@ -735,15 +753,17 @@ struct partitionIntegrityEntry {
uint8_t reserved[175];
struct regid impIdent;
uint8_t impUse[256];
-} __attribute__ ((packed));
+} __packed;
/* Short Allocation Descriptor (ECMA 167r3 4/14.14.1) */
/* Extent Length (ECMA 167r3 4/14.14.1.1) */
+#define EXT_LENGTH_MASK 0x3FFFFFFF
+#define EXT_TYPE_MASK 0xC0000000
#define EXT_RECORDED_ALLOCATED 0x00000000
#define EXT_NOT_RECORDED_ALLOCATED 0x40000000
#define EXT_NOT_RECORDED_NOT_ALLOCATED 0x80000000
-#define EXT_NEXT_EXTENT_ALLOCDECS 0xC0000000
+#define EXT_NEXT_EXTENT_ALLOCDESCS 0xC0000000
/* Long Allocation Descriptor (ECMA 167r3 4/14.14.2) */
@@ -753,15 +773,15 @@ struct partitionIntegrityEntry {
struct logicalVolHeaderDesc {
__le64 uniqueID;
uint8_t reserved[24];
-} __attribute__ ((packed));
+} __packed;
/* Path Component (ECMA 167r3 4/14.16.1) */
struct pathComponent {
uint8_t componentType;
uint8_t lengthComponentIdent;
__le16 componentFileVersionNum;
- dstring componentIdent[0];
-} __attribute__ ((packed));
+ dchars componentIdent[];
+} __packed;
/* File Entry (ECMA 167r3 4/14.17) */
struct extendedFileEntry {
@@ -789,8 +809,8 @@ struct extendedFileEntry {
__le64 uniqueID;
__le32 lengthExtendedAttr;
__le32 lengthAllocDescs;
- uint8_t extendedAttr[0];
- uint8_t allocDescs[0];
-} __attribute__ ((packed));
+ uint8_t extendedAttr[];
+ /* uint8_t allocDescs[]; */
+} __packed;
#endif /* _ECMA_167_H */
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 29569dd08168..0d76c4f37b3e 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* file.c
*
@@ -5,11 +6,6 @@
* File handling routines for the OSTA-UDF(tm) filesystem.
*
* COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
- *
* (C) 1998-1999 Dave Boynton
* (C) 1998-2004 Ben Fennema
* (C) 1999-2000 Stelias Computing Inc
@@ -27,151 +23,104 @@
#include "udfdecl.h"
#include <linux/fs.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <linux/kernel.h>
#include <linux/string.h> /* memset */
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/pagemap.h>
-#include <linux/buffer_head.h>
-#include <linux/aio.h>
+#include <linux/uio.h>
#include "udf_i.h"
#include "udf_sb.h"
-static void __udf_adinicb_readpage(struct page *page)
-{
- struct inode *inode = page->mapping->host;
- char *kaddr;
- struct udf_inode_info *iinfo = UDF_I(inode);
-
- kaddr = kmap(page);
- memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr, inode->i_size);
- memset(kaddr + inode->i_size, 0, PAGE_CACHE_SIZE - inode->i_size);
- flush_dcache_page(page);
- SetPageUptodate(page);
- kunmap(page);
-}
-
-static int udf_adinicb_readpage(struct file *file, struct page *page)
-{
- BUG_ON(!PageLocked(page));
- __udf_adinicb_readpage(page);
- unlock_page(page);
-
- return 0;
-}
-
-static int udf_adinicb_writepage(struct page *page,
- struct writeback_control *wbc)
-{
- struct inode *inode = page->mapping->host;
- char *kaddr;
- struct udf_inode_info *iinfo = UDF_I(inode);
-
- BUG_ON(!PageLocked(page));
-
- kaddr = kmap(page);
- memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr, inode->i_size);
- mark_inode_dirty(inode);
- SetPageUptodate(page);
- kunmap(page);
- unlock_page(page);
-
- return 0;
-}
-
-static int udf_adinicb_write_begin(struct file *file,
- struct address_space *mapping, loff_t pos,
- unsigned len, unsigned flags, struct page **pagep,
- void **fsdata)
+static vm_fault_t udf_page_mkwrite(struct vm_fault *vmf)
{
- struct page *page;
-
- if (WARN_ON_ONCE(pos >= PAGE_CACHE_SIZE))
- return -EIO;
- page = grab_cache_page_write_begin(mapping, 0, flags);
- if (!page)
- return -ENOMEM;
- *pagep = page;
-
- if (!PageUptodate(page) && len != PAGE_CACHE_SIZE)
- __udf_adinicb_readpage(page);
- return 0;
-}
-
-static int udf_adinicb_write_end(struct file *file,
- struct address_space *mapping,
- loff_t pos, unsigned len, unsigned copied,
- struct page *page, void *fsdata)
-{
- struct inode *inode = mapping->host;
- unsigned offset = pos & (PAGE_CACHE_SIZE - 1);
- char *kaddr;
- struct udf_inode_info *iinfo = UDF_I(inode);
-
- kaddr = kmap_atomic(page);
- memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset,
- kaddr + offset, copied);
- kunmap_atomic(kaddr);
-
- return simple_write_end(file, mapping, pos, len, copied, page, fsdata);
-}
+ struct vm_area_struct *vma = vmf->vma;
+ struct inode *inode = file_inode(vma->vm_file);
+ struct address_space *mapping = inode->i_mapping;
+ struct folio *folio = page_folio(vmf->page);
+ loff_t size;
+ unsigned int end;
+ vm_fault_t ret = VM_FAULT_LOCKED;
+ int err;
+
+ sb_start_pagefault(inode->i_sb);
+ file_update_time(vma->vm_file);
+ filemap_invalidate_lock_shared(mapping);
+ folio_lock(folio);
+ size = i_size_read(inode);
+ if (folio->mapping != inode->i_mapping || folio_pos(folio) >= size) {
+ folio_unlock(folio);
+ ret = VM_FAULT_NOPAGE;
+ goto out_unlock;
+ }
+ /* Space is already allocated for in-ICB file */
+ if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ goto out_dirty;
+ if (folio->index == size >> PAGE_SHIFT)
+ end = size & ~PAGE_MASK;
+ else
+ end = PAGE_SIZE;
+ err = __block_write_begin(folio, 0, end, udf_get_block);
+ if (err) {
+ folio_unlock(folio);
+ ret = vmf_fs_error(err);
+ goto out_unlock;
+ }
-static ssize_t udf_adinicb_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov,
- loff_t offset, unsigned long nr_segs)
-{
- /* Fallback to buffered I/O. */
- return 0;
+ block_commit_write(folio, 0, end);
+out_dirty:
+ folio_mark_dirty(folio);
+ folio_wait_stable(folio);
+out_unlock:
+ filemap_invalidate_unlock_shared(mapping);
+ sb_end_pagefault(inode->i_sb);
+ return ret;
}
-const struct address_space_operations udf_adinicb_aops = {
- .readpage = udf_adinicb_readpage,
- .writepage = udf_adinicb_writepage,
- .write_begin = udf_adinicb_write_begin,
- .write_end = udf_adinicb_write_end,
- .direct_IO = udf_adinicb_direct_IO,
+static const struct vm_operations_struct udf_file_vm_ops = {
+ .fault = filemap_fault,
+ .map_pages = filemap_map_pages,
+ .page_mkwrite = udf_page_mkwrite,
};
-static ssize_t udf_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t ppos)
+static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
ssize_t retval;
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
- int err, pos;
- size_t count = iocb->ki_left;
struct udf_inode_info *iinfo = UDF_I(inode);
- down_write(&iinfo->i_data_sem);
- if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
- if (file->f_flags & O_APPEND)
- pos = inode->i_size;
- else
- pos = ppos;
+ inode_lock(inode);
- if (inode->i_sb->s_blocksize <
- (udf_file_entry_alloc_offset(inode) +
- pos + count)) {
- err = udf_expand_file_adinicb(inode);
- if (err) {
- udf_debug("udf_expand_adinicb: err=%d\n", err);
- return err;
- }
- } else {
- if (pos + count > inode->i_size)
- iinfo->i_lenAlloc = pos + count;
- else
- iinfo->i_lenAlloc = inode->i_size;
- up_write(&iinfo->i_data_sem);
- }
- } else
+ retval = generic_write_checks(iocb, from);
+ if (retval <= 0)
+ goto out;
+
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
+ inode->i_sb->s_blocksize < (udf_file_entry_alloc_offset(inode) +
+ iocb->ki_pos + iov_iter_count(from))) {
+ filemap_invalidate_lock(inode->i_mapping);
+ retval = udf_expand_file_adinicb(inode);
+ filemap_invalidate_unlock(inode->i_mapping);
+ if (retval)
+ goto out;
+ }
+
+ retval = __generic_file_write_iter(iocb, from);
+out:
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB && retval > 0) {
+ down_write(&iinfo->i_data_sem);
+ iinfo->i_lenAlloc = inode->i_size;
up_write(&iinfo->i_data_sem);
+ }
+ inode_unlock(inode);
- retval = generic_file_aio_write(iocb, iov, nr_segs, ppos);
- if (retval > 0)
+ if (retval > 0) {
mark_inode_dirty(inode);
+ retval = generic_write_sync(iocb, retval);
+ }
return retval;
}
@@ -180,98 +129,120 @@ long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
long old_block, new_block;
- int result = -EINVAL;
+ int result;
- if (inode_permission(inode, MAY_READ) != 0) {
+ if (file_permission(filp, MAY_READ) != 0) {
udf_debug("no permission to access inode %lu\n", inode->i_ino);
- result = -EPERM;
- goto out;
+ return -EPERM;
}
- if (!arg) {
+ if (!arg && ((cmd == UDF_GETVOLIDENT) || (cmd == UDF_GETEASIZE) ||
+ (cmd == UDF_RELOCATE_BLOCKS) || (cmd == UDF_GETEABLOCK))) {
udf_debug("invalid argument to udf_ioctl\n");
- result = -EINVAL;
- goto out;
+ return -EINVAL;
}
switch (cmd) {
case UDF_GETVOLIDENT:
if (copy_to_user((char __user *)arg,
UDF_SB(inode->i_sb)->s_volume_ident, 32))
- result = -EFAULT;
- else
- result = 0;
- goto out;
+ return -EFAULT;
+ return 0;
case UDF_RELOCATE_BLOCKS:
- if (!capable(CAP_SYS_ADMIN)) {
- result = -EPERM;
- goto out;
- }
- if (get_user(old_block, (long __user *)arg)) {
- result = -EFAULT;
- goto out;
- }
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (get_user(old_block, (long __user *)arg))
+ return -EFAULT;
result = udf_relocate_blocks(inode->i_sb,
old_block, &new_block);
if (result == 0)
result = put_user(new_block, (long __user *)arg);
- goto out;
+ return result;
case UDF_GETEASIZE:
- result = put_user(UDF_I(inode)->i_lenEAttr, (int __user *)arg);
- goto out;
+ return put_user(UDF_I(inode)->i_lenEAttr, (int __user *)arg);
case UDF_GETEABLOCK:
- result = copy_to_user((char __user *)arg,
- UDF_I(inode)->i_ext.i_data,
- UDF_I(inode)->i_lenEAttr) ? -EFAULT : 0;
- goto out;
+ return copy_to_user((char __user *)arg,
+ UDF_I(inode)->i_data,
+ UDF_I(inode)->i_lenEAttr) ? -EFAULT : 0;
+ default:
+ return -ENOIOCTLCMD;
}
-out:
- return result;
+ return 0;
}
static int udf_release_file(struct inode *inode, struct file *filp)
{
- if (filp->f_mode & FMODE_WRITE) {
+ if (filp->f_mode & FMODE_WRITE &&
+ atomic_read(&inode->i_writecount) == 1) {
+ /*
+ * Grab i_mutex to avoid races with writes changing i_size
+ * while we are running.
+ */
+ inode_lock(inode);
down_write(&UDF_I(inode)->i_data_sem);
udf_discard_prealloc(inode);
udf_truncate_tail_extent(inode);
up_write(&UDF_I(inode)->i_data_sem);
+ inode_unlock(inode);
}
return 0;
}
+static int udf_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ file_accessed(file);
+ vma->vm_ops = &udf_file_vm_ops;
+
+ return 0;
+}
+
const struct file_operations udf_file_operations = {
- .read = do_sync_read,
- .aio_read = generic_file_aio_read,
+ .read_iter = generic_file_read_iter,
.unlocked_ioctl = udf_ioctl,
.open = generic_file_open,
- .mmap = generic_file_mmap,
- .write = do_sync_write,
- .aio_write = udf_file_aio_write,
+ .mmap = udf_file_mmap,
+ .write_iter = udf_file_write_iter,
.release = udf_release_file,
.fsync = generic_file_fsync,
- .splice_read = generic_file_splice_read,
+ .splice_read = filemap_splice_read,
+ .splice_write = iter_file_splice_write,
.llseek = generic_file_llseek,
};
-static int udf_setattr(struct dentry *dentry, struct iattr *attr)
+static int udf_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
+ struct iattr *attr)
{
- struct inode *inode = dentry->d_inode;
+ struct inode *inode = d_inode(dentry);
+ struct super_block *sb = inode->i_sb;
int error;
- error = inode_change_ok(inode, attr);
+ error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
if (error)
return error;
+ if ((attr->ia_valid & ATTR_UID) &&
+ UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET) &&
+ !uid_eq(attr->ia_uid, UDF_SB(sb)->s_uid))
+ return -EPERM;
+ if ((attr->ia_valid & ATTR_GID) &&
+ UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET) &&
+ !gid_eq(attr->ia_gid, UDF_SB(sb)->s_gid))
+ return -EPERM;
+
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
+ filemap_invalidate_lock(inode->i_mapping);
error = udf_setsize(inode, attr->ia_size);
+ filemap_invalidate_unlock(inode->i_mapping);
if (error)
return error;
}
- setattr_copy(inode, attr);
+ if (attr->ia_valid & ATTR_MODE)
+ udf_update_extra_perms(inode, attr->ia_mode);
+
+ setattr_copy(&nop_mnt_idmap, inode, attr);
mark_inode_dirty(inode);
return 0;
}
diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c
index 7e5aae4bf46f..5f1f969f4134 100644
--- a/fs/udf/ialloc.c
+++ b/fs/udf/ialloc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* ialloc.c
*
@@ -5,11 +6,6 @@
* Inode allocation handling routines for the OSTA-UDF(tm) filesystem.
*
* COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
- *
* (C) 1998-2001 Ben Fennema
*
* HISTORY
@@ -28,85 +24,63 @@
void udf_free_inode(struct inode *inode)
{
- struct super_block *sb = inode->i_sb;
- struct udf_sb_info *sbi = UDF_SB(sb);
-
- mutex_lock(&sbi->s_alloc_mutex);
- if (sbi->s_lvid_bh) {
- struct logicalVolIntegrityDescImpUse *lvidiu =
- udf_sb_lvidiu(sbi);
- if (S_ISDIR(inode->i_mode))
- le32_add_cpu(&lvidiu->numDirs, -1);
- else
- le32_add_cpu(&lvidiu->numFiles, -1);
- udf_updated_lvid(sb);
- }
- mutex_unlock(&sbi->s_alloc_mutex);
-
- udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1);
+ udf_free_blocks(inode->i_sb, NULL, &UDF_I(inode)->i_location, 0, 1);
}
-struct inode *udf_new_inode(struct inode *dir, umode_t mode, int *err)
+struct inode *udf_new_inode(struct inode *dir, umode_t mode)
{
struct super_block *sb = dir->i_sb;
struct udf_sb_info *sbi = UDF_SB(sb);
struct inode *inode;
- int block;
+ udf_pblk_t block;
uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
struct udf_inode_info *iinfo;
struct udf_inode_info *dinfo = UDF_I(dir);
+ int err;
inode = new_inode(sb);
- if (!inode) {
- *err = -ENOMEM;
- return NULL;
- }
- *err = -ENOSPC;
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
iinfo = UDF_I(inode);
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
iinfo->i_efe = 1;
if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
- iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
- sizeof(struct extendedFileEntry),
- GFP_KERNEL);
+ iinfo->i_data = kzalloc(inode->i_sb->s_blocksize -
+ sizeof(struct extendedFileEntry),
+ GFP_KERNEL);
} else {
iinfo->i_efe = 0;
- iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
- sizeof(struct fileEntry),
- GFP_KERNEL);
+ iinfo->i_data = kzalloc(inode->i_sb->s_blocksize -
+ sizeof(struct fileEntry),
+ GFP_KERNEL);
}
- if (!iinfo->i_ext.i_data) {
+ if (!iinfo->i_data) {
+ make_bad_inode(inode);
iput(inode);
- *err = -ENOMEM;
- return NULL;
+ return ERR_PTR(-ENOMEM);
}
+ err = -ENOSPC;
block = udf_new_block(dir->i_sb, NULL,
dinfo->i_location.partitionReferenceNum,
- start, err);
- if (*err) {
+ start, &err);
+ if (err) {
+ make_bad_inode(inode);
iput(inode);
- return NULL;
+ return ERR_PTR(err);
}
- if (sbi->s_lvid_bh) {
- struct logicalVolIntegrityDescImpUse *lvidiu;
+ iinfo->i_unique = lvid_get_unique_id(sb);
+ inode->i_generation = iinfo->i_unique;
- iinfo->i_unique = lvid_get_unique_id(sb);
- mutex_lock(&sbi->s_alloc_mutex);
- lvidiu = udf_sb_lvidiu(sbi);
- if (S_ISDIR(mode))
- le32_add_cpu(&lvidiu->numDirs, 1);
- else
- le32_add_cpu(&lvidiu->numFiles, 1);
- udf_updated_lvid(sb);
- mutex_unlock(&sbi->s_alloc_mutex);
- }
-
- inode_init_owner(inode, dir, mode);
+ inode_init_owner(&nop_mnt_idmap, inode, dir, mode);
+ if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
+ inode->i_uid = sbi->s_uid;
+ if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
+ inode->i_gid = sbi->s_gid;
iinfo->i_location.logicalBlockNum = block;
iinfo->i_location.partitionReferenceNum =
@@ -117,17 +91,23 @@ struct inode *udf_new_inode(struct inode *dir, umode_t mode, int *err)
iinfo->i_lenAlloc = 0;
iinfo->i_use = 0;
iinfo->i_checkpoint = 1;
+ iinfo->i_extraPerms = FE_PERM_U_CHATTR;
+ udf_update_extra_perms(inode, mode);
+
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
else
iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
- inode->i_mtime = inode->i_atime = inode->i_ctime =
- iinfo->i_crtime = current_fs_time(inode->i_sb);
- insert_inode_hash(inode);
+ simple_inode_init_ts(inode);
+ iinfo->i_crtime = inode_get_mtime(inode);
+ if (unlikely(insert_inode_locked(inode) < 0)) {
+ make_bad_inode(inode);
+ iput(inode);
+ return ERR_PTR(-EIO);
+ }
mark_inode_dirty(inode);
- *err = 0;
return inode;
}
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index b6d15d349810..7fae8002344a 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* inode.c
*
@@ -5,11 +6,6 @@
* Inode handling routines for the OSTA-UDF(tm) filesystem.
*
* COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
- *
* (C) 1998 Dave Boynton
* (C) 1998-2004 Ben Fennema
* (C) 1999-2000 Stelias Computing Inc
@@ -33,40 +29,43 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/pagemap.h>
-#include <linux/buffer_head.h>
#include <linux/writeback.h>
#include <linux/slab.h>
#include <linux/crc-itu-t.h>
#include <linux/mpage.h>
-#include <linux/aio.h>
+#include <linux/uio.h>
+#include <linux/bio.h>
#include "udf_i.h"
#include "udf_sb.h"
-MODULE_AUTHOR("Ben Fennema");
-MODULE_DESCRIPTION("Universal Disk Format Filesystem");
-MODULE_LICENSE("GPL");
-
#define EXTENT_MERGE_SIZE 5
+#define FE_MAPPED_PERMS (FE_PERM_U_READ | FE_PERM_U_WRITE | FE_PERM_U_EXEC | \
+ FE_PERM_G_READ | FE_PERM_G_WRITE | FE_PERM_G_EXEC | \
+ FE_PERM_O_READ | FE_PERM_O_WRITE | FE_PERM_O_EXEC)
+
+#define FE_DELETE_PERMS (FE_PERM_U_DELETE | FE_PERM_G_DELETE | \
+ FE_PERM_O_DELETE)
+
+struct udf_map_rq;
+
static umode_t udf_convert_permissions(struct fileEntry *);
static int udf_update_inode(struct inode *, int);
-static void udf_fill_inode(struct inode *, struct buffer_head *);
static int udf_sync_inode(struct inode *inode);
static int udf_alloc_i_data(struct inode *inode, size_t size);
-static sector_t inode_getblk(struct inode *, sector_t, int *, int *);
-static int8_t udf_insert_aext(struct inode *, struct extent_position,
- struct kernel_lb_addr, uint32_t);
-static void udf_split_extents(struct inode *, int *, int, int,
- struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
+static int inode_getblk(struct inode *inode, struct udf_map_rq *map);
+static int udf_insert_aext(struct inode *, struct extent_position,
+ struct kernel_lb_addr, uint32_t);
+static void udf_split_extents(struct inode *, int *, int, udf_pblk_t,
+ struct kernel_long_ad *, int *);
static void udf_prealloc_extents(struct inode *, int, int,
- struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
-static void udf_merge_extents(struct inode *,
- struct kernel_long_ad[EXTENT_MERGE_SIZE], int *);
-static void udf_update_extents(struct inode *,
- struct kernel_long_ad[EXTENT_MERGE_SIZE], int, int,
- struct extent_position *);
-static int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
+ struct kernel_long_ad *, int *);
+static void udf_merge_extents(struct inode *, struct kernel_long_ad *, int *);
+static int udf_update_extents(struct inode *, struct kernel_long_ad *, int,
+ int, struct extent_position *);
+static int udf_get_block_wb(struct inode *inode, sector_t block,
+ struct buffer_head *bh_result, int create);
static void __udf_clear_extent_cache(struct inode *inode)
{
@@ -112,7 +111,7 @@ static int udf_read_extent_cache(struct inode *inode, loff_t bcount,
/* Add extent to extent cache */
static void udf_update_extent_cache(struct inode *inode, loff_t estart,
- struct extent_position *pos, int next_epos)
+ struct extent_position *pos)
{
struct udf_inode_info *iinfo = UDF_I(inode);
@@ -121,19 +120,16 @@ static void udf_update_extent_cache(struct inode *inode, loff_t estart,
__udf_clear_extent_cache(inode);
if (pos->bh)
get_bh(pos->bh);
- memcpy(&iinfo->cached_extent.epos, pos,
- sizeof(struct extent_position));
+ memcpy(&iinfo->cached_extent.epos, pos, sizeof(*pos));
iinfo->cached_extent.lstart = estart;
- if (next_epos)
- switch (iinfo->i_alloc_type) {
- case ICBTAG_FLAG_AD_SHORT:
- iinfo->cached_extent.epos.offset -=
- sizeof(struct short_ad);
- break;
- case ICBTAG_FLAG_AD_LONG:
- iinfo->cached_extent.epos.offset -=
- sizeof(struct long_ad);
- }
+ switch (iinfo->i_alloc_type) {
+ case ICBTAG_FLAG_AD_SHORT:
+ iinfo->cached_extent.epos.offset -= sizeof(struct short_ad);
+ break;
+ case ICBTAG_FLAG_AD_LONG:
+ iinfo->cached_extent.epos.offset -= sizeof(struct long_ad);
+ break;
+ }
spin_unlock(&iinfo->i_extent_cache_lock);
}
@@ -142,23 +138,26 @@ void udf_evict_inode(struct inode *inode)
struct udf_inode_info *iinfo = UDF_I(inode);
int want_delete = 0;
- if (!inode->i_nlink && !is_bad_inode(inode)) {
- want_delete = 1;
- udf_setsize(inode, 0);
- udf_update_inode(inode, IS_SYNC(inode));
- } else
- truncate_inode_pages(&inode->i_data, 0);
+ if (!is_bad_inode(inode)) {
+ if (!inode->i_nlink) {
+ want_delete = 1;
+ udf_setsize(inode, 0);
+ udf_update_inode(inode, IS_SYNC(inode));
+ }
+ if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
+ inode->i_size != iinfo->i_lenExtents) {
+ udf_warn(inode->i_sb,
+ "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n",
+ inode->i_ino, inode->i_mode,
+ (unsigned long long)inode->i_size,
+ (unsigned long long)iinfo->i_lenExtents);
+ }
+ }
+ truncate_inode_pages_final(&inode->i_data);
invalidate_inode_buffers(inode);
clear_inode(inode);
- if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB &&
- inode->i_size != iinfo->i_lenExtents) {
- udf_warn(inode->i_sb, "Inode %lu (mode %o) has inode size %llu different from extent length %llu. Filesystem need not be standards compliant.\n",
- inode->i_ino, inode->i_mode,
- (unsigned long long)inode->i_size,
- (unsigned long long)iinfo->i_lenExtents);
- }
- kfree(iinfo->i_ext.i_data);
- iinfo->i_ext.i_data = NULL;
+ kfree(iinfo->i_data);
+ iinfo->i_data = NULL;
udf_clear_extent_cache(inode);
if (want_delete) {
udf_free_inode(inode);
@@ -172,7 +171,7 @@ static void udf_write_failed(struct address_space *mapping, loff_t to)
loff_t isize = inode->i_size;
if (to > isize) {
- truncate_pagecache(inode, to, isize);
+ truncate_pagecache(inode, isize);
if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
down_write(&iinfo->i_data_sem);
udf_clear_extent_cache(inode);
@@ -182,322 +181,346 @@ static void udf_write_failed(struct address_space *mapping, loff_t to)
}
}
-static int udf_writepage(struct page *page, struct writeback_control *wbc)
+static int udf_adinicb_writepages(struct address_space *mapping,
+ struct writeback_control *wbc)
{
- return block_write_full_page(page, udf_get_block, wbc);
+ struct inode *inode = mapping->host;
+ struct udf_inode_info *iinfo = UDF_I(inode);
+ struct folio *folio = NULL;
+ int error = 0;
+
+ while ((folio = writeback_iter(mapping, wbc, folio, &error))) {
+ BUG_ON(!folio_test_locked(folio));
+ BUG_ON(folio->index != 0);
+ memcpy_from_file_folio(iinfo->i_data + iinfo->i_lenEAttr, folio,
+ 0, i_size_read(inode));
+ folio_unlock(folio);
+ }
+
+ mark_inode_dirty(inode);
+ return 0;
}
static int udf_writepages(struct address_space *mapping,
- struct writeback_control *wbc)
+ struct writeback_control *wbc)
{
- return mpage_writepages(mapping, wbc, udf_get_block);
+ struct inode *inode = mapping->host;
+ struct udf_inode_info *iinfo = UDF_I(inode);
+
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ return udf_adinicb_writepages(mapping, wbc);
+ return mpage_writepages(mapping, wbc, udf_get_block_wb);
+}
+
+static void udf_adinicb_read_folio(struct folio *folio)
+{
+ struct inode *inode = folio->mapping->host;
+ struct udf_inode_info *iinfo = UDF_I(inode);
+ loff_t isize = i_size_read(inode);
+
+ folio_fill_tail(folio, 0, iinfo->i_data + iinfo->i_lenEAttr, isize);
+ folio_mark_uptodate(folio);
}
-static int udf_readpage(struct file *file, struct page *page)
+static int udf_read_folio(struct file *file, struct folio *folio)
{
- return mpage_readpage(page, udf_get_block);
+ struct udf_inode_info *iinfo = UDF_I(file_inode(file));
+
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+ udf_adinicb_read_folio(folio);
+ folio_unlock(folio);
+ return 0;
+ }
+ return mpage_read_folio(folio, udf_get_block);
}
-static int udf_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned nr_pages)
+static void udf_readahead(struct readahead_control *rac)
{
- return mpage_readpages(mapping, pages, nr_pages, udf_get_block);
+ struct udf_inode_info *iinfo = UDF_I(rac->mapping->host);
+
+ /*
+ * No readahead needed for in-ICB files and udf_get_block() would get
+ * confused for such file anyway.
+ */
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ return;
+
+ mpage_readahead(rac, udf_get_block);
}
-static int udf_write_begin(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
- struct page **pagep, void **fsdata)
+static int udf_write_begin(const struct kiocb *iocb,
+ struct address_space *mapping,
+ loff_t pos, unsigned len,
+ struct folio **foliop, void **fsdata)
{
+ struct file *file = iocb->ki_filp;
+ struct udf_inode_info *iinfo = UDF_I(file_inode(file));
+ struct folio *folio;
int ret;
- ret = block_write_begin(mapping, pos, len, flags, pagep, udf_get_block);
- if (unlikely(ret))
- udf_write_failed(mapping, pos + len);
- return ret;
+ if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
+ ret = block_write_begin(mapping, pos, len, foliop,
+ udf_get_block);
+ if (unlikely(ret))
+ udf_write_failed(mapping, pos + len);
+ return ret;
+ }
+ if (WARN_ON_ONCE(pos >= PAGE_SIZE))
+ return -EIO;
+ folio = __filemap_get_folio(mapping, 0, FGP_WRITEBEGIN,
+ mapping_gfp_mask(mapping));
+ if (IS_ERR(folio))
+ return PTR_ERR(folio);
+ *foliop = folio;
+ if (!folio_test_uptodate(folio))
+ udf_adinicb_read_folio(folio);
+ return 0;
}
-static ssize_t udf_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov,
- loff_t offset, unsigned long nr_segs)
+static int udf_write_end(const struct kiocb *iocb,
+ struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct folio *folio, void *fsdata)
+{
+ struct inode *inode = file_inode(iocb->ki_filp);
+ loff_t last_pos;
+
+ if (UDF_I(inode)->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB)
+ return generic_write_end(iocb, mapping, pos, len, copied, folio,
+ fsdata);
+ last_pos = pos + copied;
+ if (last_pos > inode->i_size)
+ i_size_write(inode, last_pos);
+ folio_mark_dirty(folio);
+ folio_unlock(folio);
+ folio_put(folio);
+
+ return copied;
+}
+
+static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
+ size_t count = iov_iter_count(iter);
ssize_t ret;
- ret = blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs,
- udf_get_block);
- if (unlikely(ret < 0 && (rw & WRITE)))
- udf_write_failed(mapping, offset + iov_length(iov, nr_segs));
+ /* Fallback to buffered IO for in-ICB files */
+ if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ return 0;
+ ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block);
+ if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE))
+ udf_write_failed(mapping, iocb->ki_pos + count);
return ret;
}
static sector_t udf_bmap(struct address_space *mapping, sector_t block)
{
+ struct udf_inode_info *iinfo = UDF_I(mapping->host);
+
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
+ return -EINVAL;
return generic_block_bmap(mapping, block, udf_get_block);
}
const struct address_space_operations udf_aops = {
- .readpage = udf_readpage,
- .readpages = udf_readpages,
- .writepage = udf_writepage,
+ .dirty_folio = block_dirty_folio,
+ .invalidate_folio = block_invalidate_folio,
+ .read_folio = udf_read_folio,
+ .readahead = udf_readahead,
.writepages = udf_writepages,
.write_begin = udf_write_begin,
- .write_end = generic_write_end,
+ .write_end = udf_write_end,
.direct_IO = udf_direct_IO,
.bmap = udf_bmap,
+ .migrate_folio = buffer_migrate_folio,
};
/*
* Expand file stored in ICB to a normal one-block-file
*
- * This function requires i_data_sem for writing and releases it.
* This function requires i_mutex held
*/
int udf_expand_file_adinicb(struct inode *inode)
{
- struct page *page;
- char *kaddr;
+ struct folio *folio;
struct udf_inode_info *iinfo = UDF_I(inode);
int err;
- struct writeback_control udf_wbc = {
- .sync_mode = WB_SYNC_NONE,
- .nr_to_write = 1,
- };
+ WARN_ON_ONCE(!inode_is_locked(inode));
if (!iinfo->i_lenAlloc) {
+ down_write(&iinfo->i_data_sem);
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
else
iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
- /* from now on we have normal address_space methods */
- inode->i_data.a_ops = &udf_aops;
up_write(&iinfo->i_data_sem);
mark_inode_dirty(inode);
return 0;
}
- /*
- * Release i_data_sem so that we can lock a page - page lock ranks
- * above i_data_sem. i_mutex still protects us against file changes.
- */
- up_write(&iinfo->i_data_sem);
- page = find_or_create_page(inode->i_mapping, 0, GFP_NOFS);
- if (!page)
- return -ENOMEM;
+ folio = __filemap_get_folio(inode->i_mapping, 0,
+ FGP_LOCK | FGP_ACCESSED | FGP_CREAT, GFP_KERNEL);
+ if (IS_ERR(folio))
+ return PTR_ERR(folio);
- if (!PageUptodate(page)) {
- kaddr = kmap(page);
- memset(kaddr + iinfo->i_lenAlloc, 0x00,
- PAGE_CACHE_SIZE - iinfo->i_lenAlloc);
- memcpy(kaddr, iinfo->i_ext.i_data + iinfo->i_lenEAttr,
- iinfo->i_lenAlloc);
- flush_dcache_page(page);
- SetPageUptodate(page);
- kunmap(page);
- }
+ if (!folio_test_uptodate(folio))
+ udf_adinicb_read_folio(folio);
down_write(&iinfo->i_data_sem);
- memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0x00,
+ memset(iinfo->i_data + iinfo->i_lenEAttr, 0x00,
iinfo->i_lenAlloc);
iinfo->i_lenAlloc = 0;
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
else
iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
- /* from now on we have normal address_space methods */
- inode->i_data.a_ops = &udf_aops;
+ folio_mark_dirty(folio);
+ folio_unlock(folio);
up_write(&iinfo->i_data_sem);
- err = inode->i_data.a_ops->writepage(page, &udf_wbc);
+ err = filemap_fdatawrite(inode->i_mapping);
if (err) {
/* Restore everything back so that we don't lose data... */
- lock_page(page);
- kaddr = kmap(page);
+ folio_lock(folio);
down_write(&iinfo->i_data_sem);
- memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr, kaddr,
- inode->i_size);
- kunmap(page);
- unlock_page(page);
+ memcpy_from_folio(iinfo->i_data + iinfo->i_lenEAttr,
+ folio, 0, inode->i_size);
+ folio_unlock(folio);
iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
- inode->i_data.a_ops = &udf_adinicb_aops;
+ iinfo->i_lenAlloc = inode->i_size;
up_write(&iinfo->i_data_sem);
}
- page_cache_release(page);
+ folio_put(folio);
mark_inode_dirty(inode);
return err;
}
-struct buffer_head *udf_expand_dir_adinicb(struct inode *inode, int *block,
- int *err)
-{
- int newblock;
- struct buffer_head *dbh = NULL;
- struct kernel_lb_addr eloc;
- uint8_t alloctype;
- struct extent_position epos;
+#define UDF_MAP_CREATE 0x01 /* Mapping can allocate new blocks */
+#define UDF_MAP_NOPREALLOC 0x02 /* Do not preallocate blocks */
- struct udf_fileident_bh sfibh, dfibh;
- loff_t f_pos = udf_ext0_offset(inode);
- int size = udf_ext0_offset(inode) + inode->i_size;
- struct fileIdentDesc cfi, *sfi, *dfi;
- struct udf_inode_info *iinfo = UDF_I(inode);
+#define UDF_BLK_MAPPED 0x01 /* Block was successfully mapped */
+#define UDF_BLK_NEW 0x02 /* Block was freshly allocated */
- if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
- alloctype = ICBTAG_FLAG_AD_SHORT;
- else
- alloctype = ICBTAG_FLAG_AD_LONG;
+struct udf_map_rq {
+ sector_t lblk;
+ udf_pblk_t pblk;
+ int iflags; /* UDF_MAP_ flags determining behavior */
+ int oflags; /* UDF_BLK_ flags reporting results */
+};
- if (!inode->i_size) {
- iinfo->i_alloc_type = alloctype;
- mark_inode_dirty(inode);
- return NULL;
- }
+static int udf_map_block(struct inode *inode, struct udf_map_rq *map)
+{
+ int ret;
+ struct udf_inode_info *iinfo = UDF_I(inode);
- /* alloc block, and copy data to it */
- *block = udf_new_block(inode->i_sb, inode,
- iinfo->i_location.partitionReferenceNum,
- iinfo->i_location.logicalBlockNum, err);
- if (!(*block))
- return NULL;
- newblock = udf_get_pblock(inode->i_sb, *block,
- iinfo->i_location.partitionReferenceNum,
- 0);
- if (!newblock)
- return NULL;
- dbh = udf_tgetblk(inode->i_sb, newblock);
- if (!dbh)
- return NULL;
- lock_buffer(dbh);
- memset(dbh->b_data, 0x00, inode->i_sb->s_blocksize);
- set_buffer_uptodate(dbh);
- unlock_buffer(dbh);
- mark_buffer_dirty_inode(dbh, inode);
-
- sfibh.soffset = sfibh.eoffset =
- f_pos & (inode->i_sb->s_blocksize - 1);
- sfibh.sbh = sfibh.ebh = NULL;
- dfibh.soffset = dfibh.eoffset = 0;
- dfibh.sbh = dfibh.ebh = dbh;
- while (f_pos < size) {
- iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
- sfi = udf_fileident_read(inode, &f_pos, &sfibh, &cfi, NULL,
- NULL, NULL, NULL);
- if (!sfi) {
- brelse(dbh);
- return NULL;
+ if (WARN_ON_ONCE(iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB))
+ return -EFSCORRUPTED;
+
+ map->oflags = 0;
+ if (!(map->iflags & UDF_MAP_CREATE)) {
+ struct kernel_lb_addr eloc;
+ uint32_t elen;
+ sector_t offset;
+ struct extent_position epos = {};
+ int8_t etype;
+
+ down_read(&iinfo->i_data_sem);
+ ret = inode_bmap(inode, map->lblk, &epos, &eloc, &elen, &offset,
+ &etype);
+ if (ret < 0)
+ goto out_read;
+ if (ret > 0 && etype == (EXT_RECORDED_ALLOCATED >> 30)) {
+ map->pblk = udf_get_lb_pblock(inode->i_sb, &eloc,
+ offset);
+ map->oflags |= UDF_BLK_MAPPED;
+ ret = 0;
}
- iinfo->i_alloc_type = alloctype;
- sfi->descTag.tagLocation = cpu_to_le32(*block);
- dfibh.soffset = dfibh.eoffset;
- dfibh.eoffset += (sfibh.eoffset - sfibh.soffset);
- dfi = (struct fileIdentDesc *)(dbh->b_data + dfibh.soffset);
- if (udf_write_fi(inode, sfi, dfi, &dfibh, sfi->impUse,
- sfi->fileIdent +
- le16_to_cpu(sfi->lengthOfImpUse))) {
- iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
- brelse(dbh);
- return NULL;
- }
- }
- mark_buffer_dirty_inode(dbh, inode);
+out_read:
+ up_read(&iinfo->i_data_sem);
+ brelse(epos.bh);
- memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr, 0,
- iinfo->i_lenAlloc);
- iinfo->i_lenAlloc = 0;
- eloc.logicalBlockNum = *block;
- eloc.partitionReferenceNum =
- iinfo->i_location.partitionReferenceNum;
- iinfo->i_lenExtents = inode->i_size;
- epos.bh = NULL;
- epos.block = iinfo->i_location;
- epos.offset = udf_file_entry_alloc_offset(inode);
- udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
- /* UniqueID stuff */
+ return ret;
+ }
- brelse(epos.bh);
- mark_inode_dirty(inode);
- return dbh;
+ down_write(&iinfo->i_data_sem);
+ /*
+ * Block beyond EOF and prealloc extents? Just discard preallocation
+ * as it is not useful and complicates things.
+ */
+ if (((loff_t)map->lblk) << inode->i_blkbits >= iinfo->i_lenExtents)
+ udf_discard_prealloc(inode);
+ udf_clear_extent_cache(inode);
+ ret = inode_getblk(inode, map);
+ up_write(&iinfo->i_data_sem);
+ return ret;
}
-static int udf_get_block(struct inode *inode, sector_t block,
- struct buffer_head *bh_result, int create)
+static int __udf_get_block(struct inode *inode, sector_t block,
+ struct buffer_head *bh_result, int flags)
{
- int err, new;
- sector_t phys = 0;
- struct udf_inode_info *iinfo;
-
- if (!create) {
- phys = udf_block_map(inode, block);
- if (phys)
- map_bh(bh_result, inode->i_sb, phys);
- return 0;
- }
-
- err = -EIO;
- new = 0;
- iinfo = UDF_I(inode);
+ int err;
+ struct udf_map_rq map = {
+ .lblk = block,
+ .iflags = flags,
+ };
- down_write(&iinfo->i_data_sem);
- if (block == iinfo->i_next_alloc_block + 1) {
- iinfo->i_next_alloc_block++;
- iinfo->i_next_alloc_goal++;
+ err = udf_map_block(inode, &map);
+ if (err < 0)
+ return err;
+ if (map.oflags & UDF_BLK_MAPPED) {
+ map_bh(bh_result, inode->i_sb, map.pblk);
+ if (map.oflags & UDF_BLK_NEW)
+ set_buffer_new(bh_result);
}
+ return 0;
+}
- udf_clear_extent_cache(inode);
- phys = inode_getblk(inode, block, &err, &new);
- if (!phys)
- goto abort;
-
- if (new)
- set_buffer_new(bh_result);
- map_bh(bh_result, inode->i_sb, phys);
+int udf_get_block(struct inode *inode, sector_t block,
+ struct buffer_head *bh_result, int create)
+{
+ int flags = create ? UDF_MAP_CREATE : 0;
-abort:
- up_write(&iinfo->i_data_sem);
- return err;
+ /*
+ * We preallocate blocks only for regular files. It also makes sense
+ * for directories but there's a problem when to drop the
+ * preallocation. We might use some delayed work for that but I feel
+ * it's overengineering for a filesystem like UDF.
+ */
+ if (!S_ISREG(inode->i_mode))
+ flags |= UDF_MAP_NOPREALLOC;
+ return __udf_get_block(inode, block, bh_result, flags);
}
-static struct buffer_head *udf_getblk(struct inode *inode, long block,
- int create, int *err)
+/*
+ * We shouldn't be allocating blocks on page writeback since we allocate them
+ * on page fault. We can spot dirty buffers without allocated blocks though
+ * when truncate expands file. These however don't have valid data so we can
+ * safely ignore them. So never allocate blocks from page writeback.
+ */
+static int udf_get_block_wb(struct inode *inode, sector_t block,
+ struct buffer_head *bh_result, int create)
{
- struct buffer_head *bh;
- struct buffer_head dummy;
-
- dummy.b_state = 0;
- dummy.b_blocknr = -1000;
- *err = udf_get_block(inode, block, &dummy, create);
- if (!*err && buffer_mapped(&dummy)) {
- bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
- if (buffer_new(&dummy)) {
- lock_buffer(bh);
- memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
- set_buffer_uptodate(bh);
- unlock_buffer(bh);
- mark_buffer_dirty_inode(bh, inode);
- }
- return bh;
- }
-
- return NULL;
+ return __udf_get_block(inode, block, bh_result, 0);
}
-/* Extend the file by 'blocks' blocks, return the number of extents added */
+/* Extend the file with new blocks totaling 'new_block_bytes',
+ * return the number of extents added
+ */
static int udf_do_extend_file(struct inode *inode,
struct extent_position *last_pos,
struct kernel_long_ad *last_ext,
- sector_t blocks)
+ loff_t new_block_bytes)
{
- sector_t add;
+ uint32_t add;
int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
struct super_block *sb = inode->i_sb;
- struct kernel_lb_addr prealloc_loc = {};
- int prealloc_len = 0;
struct udf_inode_info *iinfo;
int err;
/* The previous extent is fake and we should not extend by anything
* - there's nothing to do... */
- if (!blocks && fake)
+ if (!new_block_bytes && fake)
return 0;
iinfo = UDF_I(inode);
@@ -512,81 +535,78 @@ static int udf_do_extend_file(struct inode *inode,
~(sb->s_blocksize - 1);
}
- /* Last extent are just preallocated blocks? */
- if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
- EXT_NOT_RECORDED_ALLOCATED) {
- /* Save the extent so that we can reattach it to the end */
- prealloc_loc = last_ext->extLocation;
- prealloc_len = last_ext->extLength;
- /* Mark the extent as a hole */
- last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
- (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
- last_ext->extLocation.logicalBlockNum = 0;
- last_ext->extLocation.partitionReferenceNum = 0;
- }
-
+ add = 0;
/* Can we merge with the previous extent? */
if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
EXT_NOT_RECORDED_NOT_ALLOCATED) {
- add = ((1 << 30) - sb->s_blocksize -
- (last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
- sb->s_blocksize_bits;
- if (add > blocks)
- add = blocks;
- blocks -= add;
- last_ext->extLength += add << sb->s_blocksize_bits;
+ add = (1 << 30) - sb->s_blocksize -
+ (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
+ if (add > new_block_bytes)
+ add = new_block_bytes;
+ new_block_bytes -= add;
+ last_ext->extLength += add;
}
if (fake) {
- udf_add_aext(inode, last_pos, &last_ext->extLocation,
- last_ext->extLength, 1);
+ err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
+ last_ext->extLength, 1);
+ if (err < 0)
+ goto out_err;
count++;
- } else
+ } else {
+ struct kernel_lb_addr tmploc;
+ uint32_t tmplen;
+ int8_t tmptype;
+
udf_write_aext(inode, last_pos, &last_ext->extLocation,
last_ext->extLength, 1);
+ /*
+ * We've rewritten the last extent. If we are going to add
+ * more extents, we may need to enter possible following
+ * empty indirect extent.
+ */
+ if (new_block_bytes) {
+ err = udf_next_aext(inode, last_pos, &tmploc, &tmplen,
+ &tmptype, 0);
+ if (err < 0)
+ goto out_err;
+ }
+ }
+ iinfo->i_lenExtents += add;
+
/* Managed to do everything necessary? */
- if (!blocks)
+ if (!new_block_bytes)
goto out;
/* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
last_ext->extLocation.logicalBlockNum = 0;
last_ext->extLocation.partitionReferenceNum = 0;
- add = (1 << (30-sb->s_blocksize_bits)) - 1;
- last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
- (add << sb->s_blocksize_bits);
+ add = (1 << 30) - sb->s_blocksize;
+ last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | add;
/* Create enough extents to cover the whole hole */
- while (blocks > add) {
- blocks -= add;
+ while (new_block_bytes > add) {
+ new_block_bytes -= add;
err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
last_ext->extLength, 1);
if (err)
- return err;
+ goto out_err;
+ iinfo->i_lenExtents += add;
count++;
}
- if (blocks) {
+ if (new_block_bytes) {
last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
- (blocks << sb->s_blocksize_bits);
+ new_block_bytes;
err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
last_ext->extLength, 1);
if (err)
- return err;
+ goto out_err;
+ iinfo->i_lenExtents += new_block_bytes;
count++;
}
out:
- /* Do we have some preallocated blocks saved? */
- if (prealloc_len) {
- err = udf_add_aext(inode, last_pos, &prealloc_loc,
- prealloc_len, 1);
- if (err)
- return err;
- last_ext->extLocation = prealloc_loc;
- last_ext->extLength = prealloc_len;
- count++;
- }
-
/* last_pos should point to the last written extent... */
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
last_pos->offset -= sizeof(struct short_ad);
@@ -596,6 +616,33 @@ out:
return -EIO;
return count;
+out_err:
+ /* Remove extents we've created so far */
+ udf_clear_extent_cache(inode);
+ udf_truncate_extents(inode);
+ return err;
+}
+
+/* Extend the final block of the file to final_block_len bytes */
+static void udf_do_extend_final_block(struct inode *inode,
+ struct extent_position *last_pos,
+ struct kernel_long_ad *last_ext,
+ uint32_t new_elen)
+{
+ uint32_t added_bytes;
+
+ /*
+ * Extent already large enough? It may be already rounded up to block
+ * size...
+ */
+ if (new_elen <= (last_ext->extLength & UDF_EXTENT_LENGTH_MASK))
+ return;
+ added_bytes = new_elen - (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
+ last_ext->extLength += added_bytes;
+ UDF_I(inode)->i_lenExtents += added_bytes;
+
+ udf_write_aext(inode, last_pos, &last_ext->extLocation,
+ last_ext->extLength, 1);
}
static int udf_extend_file(struct inode *inode, loff_t newsize)
@@ -607,10 +654,12 @@ static int udf_extend_file(struct inode *inode, loff_t newsize)
int8_t etype;
struct super_block *sb = inode->i_sb;
sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
+ loff_t new_elen;
int adsize;
struct udf_inode_info *iinfo = UDF_I(inode);
struct kernel_long_ad extent;
- int err;
+ int err = 0;
+ bool within_last_ext;
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
adsize = sizeof(struct short_ad);
@@ -619,19 +668,21 @@ static int udf_extend_file(struct inode *inode, loff_t newsize)
else
BUG();
- etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
+ down_write(&iinfo->i_data_sem);
+ /*
+ * When creating hole in file, just don't bother with preserving
+ * preallocation. It likely won't be very useful anyway.
+ */
+ udf_discard_prealloc(inode);
- /* File has extent covering the new size (could happen when extending
- * inside a block)? */
- if (etype != -1)
- return 0;
- if (newsize & (sb->s_blocksize - 1))
- offset++;
- /* Extended file just to the boundary of the last file block? */
- if (offset == 0)
- return 0;
+ err = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset, &etype);
+ if (err < 0)
+ goto out;
+ within_last_ext = (err == 1);
+ /* We don't expect extents past EOF... */
+ WARN_ON_ONCE(within_last_ext &&
+ elen > ((loff_t)offset + 1) << inode->i_blkbits);
- /* Truncate is extending the file by 'offset' blocks */
if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
(epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
/* File has no extents at all or has empty last
@@ -641,22 +692,36 @@ static int udf_extend_file(struct inode *inode, loff_t newsize)
extent.extLength = EXT_NOT_RECORDED_NOT_ALLOCATED;
} else {
epos.offset -= adsize;
- etype = udf_next_aext(inode, &epos, &extent.extLocation,
- &extent.extLength, 0);
+ err = udf_next_aext(inode, &epos, &extent.extLocation,
+ &extent.extLength, &etype, 0);
+ if (err <= 0)
+ goto out;
extent.extLength |= etype << 30;
}
- err = udf_do_extend_file(inode, &epos, &extent, offset);
+
+ new_elen = ((loff_t)offset << inode->i_blkbits) |
+ (newsize & (sb->s_blocksize - 1));
+
+ /* File has extent covering the new size (could happen when extending
+ * inside a block)?
+ */
+ if (within_last_ext) {
+ /* Extending file within the last file block */
+ udf_do_extend_final_block(inode, &epos, &extent, new_elen);
+ } else {
+ err = udf_do_extend_file(inode, &epos, &extent, new_elen);
+ }
+
if (err < 0)
goto out;
err = 0;
- iinfo->i_lenExtents = newsize;
out:
brelse(epos.bh);
+ up_write(&iinfo->i_data_sem);
return err;
}
-static sector_t inode_getblk(struct inode *inode, sector_t block,
- int *err, int *new)
+static int inode_getblk(struct inode *inode, struct udf_map_rq *map)
{
struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
struct extent_position prev_epos, cur_epos, next_epos;
@@ -665,21 +730,20 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
struct kernel_lb_addr eloc, tmpeloc;
int c = 1;
loff_t lbcount = 0, b_off = 0;
- uint32_t newblocknum, newblock;
+ udf_pblk_t newblocknum;
sector_t offset = 0;
- int8_t etype;
+ int8_t etype, tmpetype;
struct udf_inode_info *iinfo = UDF_I(inode);
- int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
+ udf_pblk_t goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
int lastblock = 0;
- bool isBeyondEOF;
+ bool isBeyondEOF = false;
+ int ret = 0;
- *err = 0;
- *new = 0;
prev_epos.offset = udf_file_entry_alloc_offset(inode);
prev_epos.block = iinfo->i_location;
prev_epos.bh = NULL;
cur_epos = next_epos = prev_epos;
- b_off = (loff_t)block << inode->i_sb->s_blocksize_bits;
+ b_off = (loff_t)map->lblk << inode->i_sb->s_blocksize_bits;
/* find the extent which contains the block we are looking for.
alternate between laarr[0] and laarr[1] for locations of the
@@ -704,9 +768,13 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
prev_epos.offset = cur_epos.offset;
cur_epos.offset = next_epos.offset;
- etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 1);
- if (etype == -1)
+ ret = udf_next_aext(inode, &next_epos, &eloc, &elen, &etype, 1);
+ if (ret < 0) {
+ goto out_free;
+ } else if (ret == 0) {
+ isBeyondEOF = true;
break;
+ }
c = !c;
@@ -727,30 +795,36 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
* Move prev_epos and cur_epos into indirect extent if we are at
* the pointer to it
*/
- udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, 0);
- udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, 0);
+ ret = udf_next_aext(inode, &prev_epos, &tmpeloc, &tmpelen, &tmpetype, 0);
+ if (ret < 0)
+ goto out_free;
+ ret = udf_next_aext(inode, &cur_epos, &tmpeloc, &tmpelen, &tmpetype, 0);
+ if (ret < 0)
+ goto out_free;
/* if the extent is allocated and recorded, return the block
if the extent is not a multiple of the blocksize, round up */
- if (etype == (EXT_RECORDED_ALLOCATED >> 30)) {
+ if (!isBeyondEOF && etype == (EXT_RECORDED_ALLOCATED >> 30)) {
if (elen & (inode->i_sb->s_blocksize - 1)) {
elen = EXT_RECORDED_ALLOCATED |
((elen + inode->i_sb->s_blocksize - 1) &
~(inode->i_sb->s_blocksize - 1));
+ iinfo->i_lenExtents =
+ ALIGN(iinfo->i_lenExtents,
+ inode->i_sb->s_blocksize);
udf_write_aext(inode, &cur_epos, &eloc, elen, 1);
}
- brelse(prev_epos.bh);
- brelse(cur_epos.bh);
- brelse(next_epos.bh);
- newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
- return newblock;
+ map->oflags = UDF_BLK_MAPPED;
+ map->pblk = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
+ ret = 0;
+ goto out_free;
}
- /* Are we beyond EOF? */
- if (etype == -1) {
- int ret;
- isBeyondEOF = 1;
+ /* Are we beyond EOF and preallocated extent? */
+ if (isBeyondEOF) {
+ loff_t hole_len;
+
if (count) {
if (c)
laarr[0] = laarr[1];
@@ -765,34 +839,27 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
startnum = (offset > 0);
}
/* Create extents for the hole between EOF and offset */
- ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
- if (ret < 0) {
- brelse(prev_epos.bh);
- brelse(cur_epos.bh);
- brelse(next_epos.bh);
- *err = ret;
- return 0;
- }
+ hole_len = (loff_t)offset << inode->i_blkbits;
+ ret = udf_do_extend_file(inode, &prev_epos, laarr, hole_len);
+ if (ret < 0)
+ goto out_free;
c = 0;
offset = 0;
count += ret;
- /* We are not covered by a preallocated extent? */
- if ((laarr[0].extLength & UDF_EXTENT_FLAG_MASK) !=
- EXT_NOT_RECORDED_ALLOCATED) {
- /* Is there any real extent? - otherwise we overwrite
- * the fake one... */
- if (count)
- c = !c;
- laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
- inode->i_sb->s_blocksize;
- memset(&laarr[c].extLocation, 0x00,
- sizeof(struct kernel_lb_addr));
- count++;
- }
+ /*
+ * Is there any real extent? - otherwise we overwrite the fake
+ * one...
+ */
+ if (count)
+ c = !c;
+ laarr[c].extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
+ inode->i_sb->s_blocksize;
+ memset(&laarr[c].extLocation, 0x00,
+ sizeof(struct kernel_lb_addr));
+ count++;
endnum = c + 1;
lastblock = 1;
} else {
- isBeyondEOF = 0;
endnum = startnum = ((count > 2) ? 2 : count);
/* if the current extent is in position 0,
@@ -806,15 +873,17 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
/* if the current block is located in an extent,
read the next extent */
- etype = udf_next_aext(inode, &next_epos, &eloc, &elen, 0);
- if (etype != -1) {
+ ret = udf_next_aext(inode, &next_epos, &eloc, &elen, &etype, 0);
+ if (ret > 0) {
laarr[c + 1].extLength = (etype << 30) | elen;
laarr[c + 1].extLocation = eloc;
count++;
startnum++;
endnum++;
- } else
+ } else if (ret == 0)
lastblock = 1;
+ else
+ goto out_free;
}
/* if the current extent is not recorded but allocated, get the
@@ -822,7 +891,7 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
if ((laarr[c].extLength >> 30) == (EXT_NOT_RECORDED_ALLOCATED >> 30))
newblocknum = laarr[c].extLocation.logicalBlockNum + offset;
else { /* otherwise, allocate a new block */
- if (iinfo->i_next_alloc_block == block)
+ if (iinfo->i_next_alloc_block == map->lblk)
goal = iinfo->i_next_alloc_goal;
if (!goal) {
@@ -832,14 +901,9 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
newblocknum = udf_new_block(inode->i_sb, inode,
iinfo->i_location.partitionReferenceNum,
- goal, err);
- if (!newblocknum) {
- brelse(prev_epos.bh);
- brelse(cur_epos.bh);
- brelse(next_epos.bh);
- *err = -ENOSPC;
- return 0;
- }
+ goal, &ret);
+ if (!newblocknum)
+ goto out_free;
if (isBeyondEOF)
iinfo->i_lenExtents += inode->i_sb->s_blocksize;
}
@@ -850,14 +914,8 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
* block */
udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum);
-#ifdef UDF_PREALLOCATE
- /* We preallocate blocks only for regular files. It also makes sense
- * for directories but there's a problem when to drop the
- * preallocation. We might use some delayed work for that but I feel
- * it's overengineering for a filesystem like UDF. */
- if (S_ISREG(inode->i_mode))
+ if (!(map->iflags & UDF_MAP_NOPREALLOC))
udf_prealloc_extents(inode, c, lastblock, laarr, &endnum);
-#endif
/* merge any continuous blocks in laarr */
udf_merge_extents(inode, laarr, &endnum);
@@ -865,35 +923,36 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
/* write back the new extents, inserting new extents if the new number
* of extents is greater than the old number, and deleting extents if
* the new number of extents is less than the old number */
- udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
-
- brelse(prev_epos.bh);
- brelse(cur_epos.bh);
- brelse(next_epos.bh);
+ ret = udf_update_extents(inode, laarr, startnum, endnum, &prev_epos);
+ if (ret < 0)
+ goto out_free;
- newblock = udf_get_pblock(inode->i_sb, newblocknum,
+ map->pblk = udf_get_pblock(inode->i_sb, newblocknum,
iinfo->i_location.partitionReferenceNum, 0);
- if (!newblock) {
- *err = -EIO;
- return 0;
+ if (!map->pblk) {
+ ret = -EFSCORRUPTED;
+ goto out_free;
}
- *new = 1;
- iinfo->i_next_alloc_block = block;
- iinfo->i_next_alloc_goal = newblocknum;
- inode->i_ctime = current_fs_time(inode->i_sb);
+ map->oflags = UDF_BLK_NEW | UDF_BLK_MAPPED;
+ iinfo->i_next_alloc_block = map->lblk + 1;
+ iinfo->i_next_alloc_goal = newblocknum + 1;
+ inode_set_ctime_current(inode);
if (IS_SYNC(inode))
udf_sync_inode(inode);
else
mark_inode_dirty(inode);
-
- return newblock;
+ ret = 0;
+out_free:
+ brelse(prev_epos.bh);
+ brelse(cur_epos.bh);
+ brelse(next_epos.bh);
+ return ret;
}
static void udf_split_extents(struct inode *inode, int *c, int offset,
- int newblocknum,
- struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
- int *endnum)
+ udf_pblk_t newblocknum,
+ struct kernel_long_ad *laarr, int *endnum)
{
unsigned long blocksize = inode->i_sb->s_blocksize;
unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
@@ -956,7 +1015,7 @@ static void udf_split_extents(struct inode *inode, int *c, int offset,
}
static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
- struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
+ struct kernel_long_ad *laarr,
int *endnum)
{
int start, length = 0, currlength = 0, i;
@@ -1051,8 +1110,7 @@ static void udf_prealloc_extents(struct inode *inode, int c, int lastblock,
}
}
-static void udf_merge_extents(struct inode *inode,
- struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
+static void udf_merge_extents(struct inode *inode, struct kernel_long_ad *laarr,
int *endnum)
{
int i;
@@ -1072,23 +1130,8 @@ static void udf_merge_extents(struct inode *inode,
blocksize - 1) >> blocksize_bits)))) {
if (((li->extLength & UDF_EXTENT_LENGTH_MASK) +
- (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
- blocksize - 1) & ~UDF_EXTENT_LENGTH_MASK) {
- lip1->extLength = (lip1->extLength -
- (li->extLength &
- UDF_EXTENT_LENGTH_MASK) +
- UDF_EXTENT_LENGTH_MASK) &
- ~(blocksize - 1);
- li->extLength = (li->extLength &
- UDF_EXTENT_FLAG_MASK) +
- (UDF_EXTENT_LENGTH_MASK + 1) -
- blocksize;
- lip1->extLocation.logicalBlockNum =
- li->extLocation.logicalBlockNum +
- ((li->extLength &
- UDF_EXTENT_LENGTH_MASK) >>
- blocksize_bits);
- } else {
+ (lip1->extLength & UDF_EXTENT_LENGTH_MASK) +
+ blocksize - 1) <= UDF_EXTENT_LENGTH_MASK) {
li->extLength = lip1->extLength +
(((li->extLength &
UDF_EXTENT_LENGTH_MASK) +
@@ -1151,52 +1194,78 @@ static void udf_merge_extents(struct inode *inode,
}
}
-static void udf_update_extents(struct inode *inode,
- struct kernel_long_ad laarr[EXTENT_MERGE_SIZE],
- int startnum, int endnum,
- struct extent_position *epos)
+static int udf_update_extents(struct inode *inode, struct kernel_long_ad *laarr,
+ int startnum, int endnum,
+ struct extent_position *epos)
{
int start = 0, i;
struct kernel_lb_addr tmploc;
uint32_t tmplen;
+ int8_t tmpetype;
+ int err;
if (startnum > endnum) {
for (i = 0; i < (startnum - endnum); i++)
- udf_delete_aext(inode, *epos, laarr[i].extLocation,
- laarr[i].extLength);
+ udf_delete_aext(inode, *epos);
} else if (startnum < endnum) {
for (i = 0; i < (endnum - startnum); i++) {
- udf_insert_aext(inode, *epos, laarr[i].extLocation,
- laarr[i].extLength);
- udf_next_aext(inode, epos, &laarr[i].extLocation,
- &laarr[i].extLength, 1);
+ err = udf_insert_aext(inode, *epos,
+ laarr[i].extLocation,
+ laarr[i].extLength);
+ /*
+ * If we fail here, we are likely corrupting the extent
+ * list and leaking blocks. At least stop early to
+ * limit the damage.
+ */
+ if (err < 0)
+ return err;
+ err = udf_next_aext(inode, epos, &laarr[i].extLocation,
+ &laarr[i].extLength, &tmpetype, 1);
+ if (err < 0)
+ return err;
start++;
}
}
for (i = start; i < endnum; i++) {
- udf_next_aext(inode, epos, &tmploc, &tmplen, 0);
+ err = udf_next_aext(inode, epos, &tmploc, &tmplen, &tmpetype, 0);
+ if (err < 0)
+ return err;
+
udf_write_aext(inode, epos, &laarr[i].extLocation,
laarr[i].extLength, 1);
}
+ return 0;
}
-struct buffer_head *udf_bread(struct inode *inode, int block,
+struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block,
int create, int *err)
{
struct buffer_head *bh = NULL;
+ struct udf_map_rq map = {
+ .lblk = block,
+ .iflags = UDF_MAP_NOPREALLOC | (create ? UDF_MAP_CREATE : 0),
+ };
- bh = udf_getblk(inode, block, create, err);
- if (!bh)
+ *err = udf_map_block(inode, &map);
+ if (*err || !(map.oflags & UDF_BLK_MAPPED))
return NULL;
- if (buffer_uptodate(bh))
+ bh = sb_getblk(inode->i_sb, map.pblk);
+ if (!bh) {
+ *err = -ENOMEM;
+ return NULL;
+ }
+ if (map.oflags & UDF_BLK_NEW) {
+ lock_buffer(bh);
+ memset(bh->b_data, 0x00, inode->i_sb->s_blocksize);
+ set_buffer_uptodate(bh);
+ unlock_buffer(bh);
+ mark_buffer_dirty_inode(bh, inode);
return bh;
+ }
- ll_rw_block(READ, 1, &bh);
-
- wait_on_buffer(bh);
- if (buffer_uptodate(bh))
+ if (bh_read(bh, 0) >= 0)
return bh;
brelse(bh);
@@ -1206,44 +1275,38 @@ struct buffer_head *udf_bread(struct inode *inode, int block,
int udf_setsize(struct inode *inode, loff_t newsize)
{
- int err;
+ int err = 0;
struct udf_inode_info *iinfo;
- int bsize = 1 << inode->i_blkbits;
+ unsigned int bsize = i_blocksize(inode);
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
S_ISLNK(inode->i_mode)))
return -EINVAL;
- if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
- return -EPERM;
iinfo = UDF_I(inode);
if (newsize > inode->i_size) {
- down_write(&iinfo->i_data_sem);
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
- if (bsize <
+ if (bsize >=
(udf_file_entry_alloc_offset(inode) + newsize)) {
- err = udf_expand_file_adinicb(inode);
- if (err)
- return err;
down_write(&iinfo->i_data_sem);
- } else {
iinfo->i_lenAlloc = newsize;
+ up_write(&iinfo->i_data_sem);
goto set_size;
}
+ err = udf_expand_file_adinicb(inode);
+ if (err)
+ return err;
}
err = udf_extend_file(inode, newsize);
- if (err) {
- up_write(&iinfo->i_data_sem);
+ if (err)
return err;
- }
set_size:
truncate_setsize(inode, newsize);
- up_write(&iinfo->i_data_sem);
} else {
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
down_write(&iinfo->i_data_sem);
udf_clear_extent_cache(inode);
- memset(iinfo->i_ext.i_data + iinfo->i_lenEAttr + newsize,
+ memset(iinfo->i_data + iinfo->i_lenEAttr + newsize,
0x00, bsize - newsize -
udf_file_entry_alloc_offset(inode));
iinfo->i_lenAlloc = newsize;
@@ -1255,27 +1318,59 @@ set_size:
udf_get_block);
if (err)
return err;
+ truncate_setsize(inode, newsize);
down_write(&iinfo->i_data_sem);
udf_clear_extent_cache(inode);
- truncate_setsize(inode, newsize);
- udf_truncate_extents(inode);
+ err = udf_truncate_extents(inode);
up_write(&iinfo->i_data_sem);
+ if (err)
+ return err;
}
update_time:
- inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
+ inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
if (IS_SYNC(inode))
udf_sync_inode(inode);
else
mark_inode_dirty(inode);
- return 0;
+ return err;
}
-static void __udf_read_inode(struct inode *inode)
+/*
+ * Maximum length of linked list formed by ICB hierarchy. The chosen number is
+ * arbitrary - just that we hopefully don't limit any real use of rewritten
+ * inode on write-once media but avoid looping for too long on corrupted media.
+ */
+#define UDF_MAX_ICB_NESTING 1024
+
+static int udf_read_inode(struct inode *inode, bool hidden_inode)
{
struct buffer_head *bh = NULL;
struct fileEntry *fe;
+ struct extendedFileEntry *efe;
uint16_t ident;
struct udf_inode_info *iinfo = UDF_I(inode);
+ struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
+ struct kernel_lb_addr *iloc = &iinfo->i_location;
+ unsigned int link_count;
+ unsigned int indirections = 0;
+ int bs = inode->i_sb->s_blocksize;
+ int ret = -EIO;
+ uint32_t uid, gid;
+ struct timespec64 ts;
+
+reread:
+ if (iloc->partitionReferenceNum >= sbi->s_partitions) {
+ udf_debug("partition reference: %u > logical volume partitions: %u\n",
+ iloc->partitionReferenceNum, sbi->s_partitions);
+ return -EIO;
+ }
+
+ if (iloc->logicalBlockNum >=
+ sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) {
+ udf_debug("block=%u, partition=%u out of range\n",
+ iloc->logicalBlockNum, iloc->partitionReferenceNum);
+ return -EIO;
+ }
/*
* Set defaults, but the inode is still incomplete!
@@ -1289,78 +1384,54 @@ static void __udf_read_inode(struct inode *inode)
* i_nlink = 1
* i_op = NULL;
*/
- bh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 0, &ident);
+ bh = udf_read_ptagged(inode->i_sb, iloc, 0, &ident);
if (!bh) {
- udf_err(inode->i_sb, "(ino %ld) failed !bh\n", inode->i_ino);
- make_bad_inode(inode);
- return;
+ udf_err(inode->i_sb, "(ino %lu) failed !bh\n", inode->i_ino);
+ return -EIO;
}
if (ident != TAG_IDENT_FE && ident != TAG_IDENT_EFE &&
ident != TAG_IDENT_USE) {
- udf_err(inode->i_sb, "(ino %ld) failed ident=%d\n",
+ udf_err(inode->i_sb, "(ino %lu) failed ident=%u\n",
inode->i_ino, ident);
- brelse(bh);
- make_bad_inode(inode);
- return;
+ goto out;
}
fe = (struct fileEntry *)bh->b_data;
+ efe = (struct extendedFileEntry *)bh->b_data;
if (fe->icbTag.strategyType == cpu_to_le16(4096)) {
struct buffer_head *ibh;
- ibh = udf_read_ptagged(inode->i_sb, &iinfo->i_location, 1,
- &ident);
+ ibh = udf_read_ptagged(inode->i_sb, iloc, 1, &ident);
if (ident == TAG_IDENT_IE && ibh) {
- struct buffer_head *nbh = NULL;
struct kernel_lb_addr loc;
struct indirectEntry *ie;
ie = (struct indirectEntry *)ibh->b_data;
loc = lelb_to_cpu(ie->indirectICB.extLocation);
- if (ie->indirectICB.extLength &&
- (nbh = udf_read_ptagged(inode->i_sb, &loc, 0,
- &ident))) {
- if (ident == TAG_IDENT_FE ||
- ident == TAG_IDENT_EFE) {
- memcpy(&iinfo->i_location,
- &loc,
- sizeof(struct kernel_lb_addr));
- brelse(bh);
- brelse(ibh);
- brelse(nbh);
- __udf_read_inode(inode);
- return;
+ if (ie->indirectICB.extLength) {
+ brelse(ibh);
+ memcpy(&iinfo->i_location, &loc,
+ sizeof(struct kernel_lb_addr));
+ if (++indirections > UDF_MAX_ICB_NESTING) {
+ udf_err(inode->i_sb,
+ "too many ICBs in ICB hierarchy"
+ " (max %d supported)\n",
+ UDF_MAX_ICB_NESTING);
+ goto out;
}
- brelse(nbh);
+ brelse(bh);
+ goto reread;
}
}
brelse(ibh);
} else if (fe->icbTag.strategyType != cpu_to_le16(4)) {
- udf_err(inode->i_sb, "unsupported strategy type: %d\n",
+ udf_err(inode->i_sb, "unsupported strategy type: %u\n",
le16_to_cpu(fe->icbTag.strategyType));
- brelse(bh);
- make_bad_inode(inode);
- return;
+ goto out;
}
- udf_fill_inode(inode, bh);
-
- brelse(bh);
-}
-
-static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
-{
- struct fileEntry *fe;
- struct extendedFileEntry *efe;
- struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
- struct udf_inode_info *iinfo = UDF_I(inode);
- unsigned int link_count;
-
- fe = (struct fileEntry *)bh->b_data;
- efe = (struct extendedFileEntry *)bh->b_data;
-
if (fe->icbTag.strategyType == cpu_to_le16(4))
iinfo->i_strat4096 = 0;
else /* if (fe->icbTag.strategyType == cpu_to_le16(4096)) */
@@ -1368,6 +1439,13 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
iinfo->i_alloc_type = le16_to_cpu(fe->icbTag.flags) &
ICBTAG_FLAG_AD_MASK;
+ if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_SHORT &&
+ iinfo->i_alloc_type != ICBTAG_FLAG_AD_LONG &&
+ iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
+ ret = -EIO;
+ goto out;
+ }
+ iinfo->i_hidden = hidden_inode;
iinfo->i_unique = 0;
iinfo->i_lenEAttr = 0;
iinfo->i_lenExtents = 0;
@@ -1377,56 +1455,53 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_EFE)) {
iinfo->i_efe = 1;
iinfo->i_use = 0;
- if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
- sizeof(struct extendedFileEntry))) {
- make_bad_inode(inode);
- return;
- }
- memcpy(iinfo->i_ext.i_data,
- bh->b_data + sizeof(struct extendedFileEntry),
- inode->i_sb->s_blocksize -
+ ret = udf_alloc_i_data(inode, bs -
sizeof(struct extendedFileEntry));
+ if (ret)
+ goto out;
+ memcpy(iinfo->i_data,
+ bh->b_data + sizeof(struct extendedFileEntry),
+ bs - sizeof(struct extendedFileEntry));
} else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_FE)) {
iinfo->i_efe = 0;
iinfo->i_use = 0;
- if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
- sizeof(struct fileEntry))) {
- make_bad_inode(inode);
- return;
- }
- memcpy(iinfo->i_ext.i_data,
+ ret = udf_alloc_i_data(inode, bs - sizeof(struct fileEntry));
+ if (ret)
+ goto out;
+ memcpy(iinfo->i_data,
bh->b_data + sizeof(struct fileEntry),
- inode->i_sb->s_blocksize - sizeof(struct fileEntry));
+ bs - sizeof(struct fileEntry));
} else if (fe->descTag.tagIdent == cpu_to_le16(TAG_IDENT_USE)) {
iinfo->i_efe = 0;
iinfo->i_use = 1;
iinfo->i_lenAlloc = le32_to_cpu(
((struct unallocSpaceEntry *)bh->b_data)->
lengthAllocDescs);
- if (udf_alloc_i_data(inode, inode->i_sb->s_blocksize -
- sizeof(struct unallocSpaceEntry))) {
- make_bad_inode(inode);
- return;
- }
- memcpy(iinfo->i_ext.i_data,
- bh->b_data + sizeof(struct unallocSpaceEntry),
- inode->i_sb->s_blocksize -
+ ret = udf_alloc_i_data(inode, bs -
sizeof(struct unallocSpaceEntry));
- return;
+ if (ret)
+ goto out;
+ memcpy(iinfo->i_data,
+ bh->b_data + sizeof(struct unallocSpaceEntry),
+ bs - sizeof(struct unallocSpaceEntry));
+ return 0;
}
+ ret = -EIO;
read_lock(&sbi->s_cred_lock);
- i_uid_write(inode, le32_to_cpu(fe->uid));
- if (!uid_valid(inode->i_uid) ||
- UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_IGNORE) ||
+ uid = le32_to_cpu(fe->uid);
+ if (uid == UDF_INVALID_ID ||
UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_SET))
- inode->i_uid = UDF_SB(inode->i_sb)->s_uid;
+ inode->i_uid = sbi->s_uid;
+ else
+ i_uid_write(inode, uid);
- i_gid_write(inode, le32_to_cpu(fe->gid));
- if (!gid_valid(inode->i_gid) ||
- UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_IGNORE) ||
+ gid = le32_to_cpu(fe->gid);
+ if (gid == UDF_INVALID_ID ||
UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_SET))
- inode->i_gid = UDF_SB(inode->i_sb)->s_gid;
+ inode->i_gid = sbi->s_gid;
+ else
+ i_gid_write(inode, gid);
if (fe->icbTag.fileType != ICBTAG_FILE_TYPE_DIRECTORY &&
sbi->s_fmode != UDF_INVALID_MODE)
@@ -1437,11 +1512,18 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
else
inode->i_mode = udf_convert_permissions(fe);
inode->i_mode &= ~sbi->s_umask;
+ iinfo->i_extraPerms = le32_to_cpu(fe->permissions) & ~FE_MAPPED_PERMS;
+
read_unlock(&sbi->s_cred_lock);
link_count = le16_to_cpu(fe->fileLinkCount);
- if (!link_count)
+ if (!link_count) {
+ if (!hidden_inode) {
+ ret = -ESTALE;
+ goto out;
+ }
link_count = 1;
+ }
set_nlink(inode, link_count);
inode->i_size = le64_to_cpu(fe->informationLength);
@@ -1451,41 +1533,68 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
(inode->i_sb->s_blocksize_bits - 9);
- if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
- inode->i_atime = sbi->s_record_time;
-
- if (!udf_disk_stamp_to_time(&inode->i_mtime,
- fe->modificationTime))
- inode->i_mtime = sbi->s_record_time;
-
- if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
- inode->i_ctime = sbi->s_record_time;
+ udf_disk_stamp_to_time(&ts, fe->accessTime);
+ inode_set_atime_to_ts(inode, ts);
+ udf_disk_stamp_to_time(&ts, fe->modificationTime);
+ inode_set_mtime_to_ts(inode, ts);
+ udf_disk_stamp_to_time(&ts, fe->attrTime);
+ inode_set_ctime_to_ts(inode, ts);
iinfo->i_unique = le64_to_cpu(fe->uniqueID);
iinfo->i_lenEAttr = le32_to_cpu(fe->lengthExtendedAttr);
iinfo->i_lenAlloc = le32_to_cpu(fe->lengthAllocDescs);
iinfo->i_checkpoint = le32_to_cpu(fe->checkpoint);
+ iinfo->i_streamdir = 0;
+ iinfo->i_lenStreams = 0;
} else {
inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
(inode->i_sb->s_blocksize_bits - 9);
- if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
- inode->i_atime = sbi->s_record_time;
-
- if (!udf_disk_stamp_to_time(&inode->i_mtime,
- efe->modificationTime))
- inode->i_mtime = sbi->s_record_time;
-
- if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
- iinfo->i_crtime = sbi->s_record_time;
-
- if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
- inode->i_ctime = sbi->s_record_time;
+ udf_disk_stamp_to_time(&ts, efe->accessTime);
+ inode_set_atime_to_ts(inode, ts);
+ udf_disk_stamp_to_time(&ts, efe->modificationTime);
+ inode_set_mtime_to_ts(inode, ts);
+ udf_disk_stamp_to_time(&ts, efe->attrTime);
+ inode_set_ctime_to_ts(inode, ts);
+ udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime);
iinfo->i_unique = le64_to_cpu(efe->uniqueID);
iinfo->i_lenEAttr = le32_to_cpu(efe->lengthExtendedAttr);
iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
+
+ /* Named streams */
+ iinfo->i_streamdir = (efe->streamDirectoryICB.extLength != 0);
+ iinfo->i_locStreamdir =
+ lelb_to_cpu(efe->streamDirectoryICB.extLocation);
+ iinfo->i_lenStreams = le64_to_cpu(efe->objectSize);
+ if (iinfo->i_lenStreams >= inode->i_size)
+ iinfo->i_lenStreams -= inode->i_size;
+ else
+ iinfo->i_lenStreams = 0;
+ }
+ inode->i_generation = iinfo->i_unique;
+
+ /*
+ * Sanity check length of allocation descriptors and extended attrs to
+ * avoid integer overflows
+ */
+ if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs)
+ goto out;
+ /* Now do exact checks */
+ if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs)
+ goto out;
+ /* Sanity checks for files in ICB so that we don't get confused later */
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+ /*
+ * For file in ICB data is stored in allocation descriptor
+ * so sizes should match
+ */
+ if (iinfo->i_lenAlloc != inode->i_size)
+ goto out;
+ /* File in ICB has to fit in there... */
+ if (inode->i_size > bs - udf_file_entry_alloc_offset(inode))
+ goto out;
}
switch (fe->icbTag.fileType) {
@@ -1499,10 +1608,7 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
case ICBTAG_FILE_TYPE_REGULAR:
case ICBTAG_FILE_TYPE_UNDEF:
case ICBTAG_FILE_TYPE_VAT20:
- if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- inode->i_data.a_ops = &udf_adinicb_aops;
- else
- inode->i_data.a_ops = &udf_aops;
+ inode->i_data.a_ops = &udf_aops;
inode->i_op = &udf_file_inode_operations;
inode->i_fop = &udf_file_operations;
inode->i_mode |= S_IFREG;
@@ -1522,7 +1628,8 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
case ICBTAG_FILE_TYPE_SYMLINK:
inode->i_data.a_ops = &udf_symlink_aops;
inode->i_op = &udf_symlink_inode_operations;
- inode->i_mode = S_IFLNK | S_IRWXUGO;
+ inode_nohighmem(inode);
+ inode->i_mode = S_IFLNK | 0777;
break;
case ICBTAG_FILE_TYPE_MAIN:
udf_debug("METADATA FILE-----\n");
@@ -1534,10 +1641,9 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
udf_debug("METADATA BITMAP FILE-----\n");
break;
default:
- udf_err(inode->i_sb, "(ino %ld) failed unknown file type=%d\n",
+ udf_err(inode->i_sb, "(ino %lu) failed unknown file type=%u\n",
inode->i_ino, fe->icbTag.fileType);
- make_bad_inode(inode);
- return;
+ goto out;
}
if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
struct deviceSpec *dsea =
@@ -1548,21 +1654,20 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
le32_to_cpu(dsea->minorDeviceIdent)));
/* Developer ID ??? */
} else
- make_bad_inode(inode);
+ goto out;
}
+ ret = 0;
+out:
+ brelse(bh);
+ return ret;
}
static int udf_alloc_i_data(struct inode *inode, size_t size)
{
struct udf_inode_info *iinfo = UDF_I(inode);
- iinfo->i_ext.i_data = kmalloc(size, GFP_KERNEL);
-
- if (!iinfo->i_ext.i_data) {
- udf_err(inode->i_sb, "(ino %ld) no free memory\n",
- inode->i_ino);
+ iinfo->i_data = kmalloc(size, GFP_KERNEL);
+ if (!iinfo->i_data)
return -ENOMEM;
- }
-
return 0;
}
@@ -1575,9 +1680,9 @@ static umode_t udf_convert_permissions(struct fileEntry *fe)
permissions = le32_to_cpu(fe->permissions);
flags = le16_to_cpu(fe->icbTag.flags);
- mode = ((permissions) & S_IRWXO) |
- ((permissions >> 2) & S_IRWXG) |
- ((permissions >> 4) & S_IRWXU) |
+ mode = ((permissions) & 0007) |
+ ((permissions >> 2) & 0070) |
+ ((permissions >> 4) & 0700) |
((flags & ICBTAG_FLAG_SETUID) ? S_ISUID : 0) |
((flags & ICBTAG_FLAG_SETGID) ? S_ISGID : 0) |
((flags & ICBTAG_FLAG_STICKY) ? S_ISVTX : 0);
@@ -1585,6 +1690,23 @@ static umode_t udf_convert_permissions(struct fileEntry *fe)
return mode;
}
+void udf_update_extra_perms(struct inode *inode, umode_t mode)
+{
+ struct udf_inode_info *iinfo = UDF_I(inode);
+
+ /*
+ * UDF 2.01 sec. 3.3.3.3 Note 2:
+ * In Unix, delete permission tracks write
+ */
+ iinfo->i_extraPerms &= ~FE_DELETE_PERMS;
+ if (mode & 0200)
+ iinfo->i_extraPerms |= FE_PERM_U_DELETE;
+ if (mode & 0020)
+ iinfo->i_extraPerms |= FE_PERM_G_DELETE;
+ if (mode & 0002)
+ iinfo->i_extraPerms |= FE_PERM_O_DELETE;
+}
+
int udf_write_inode(struct inode *inode, struct writeback_control *wbc)
{
return udf_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
@@ -1595,6 +1717,14 @@ static int udf_sync_inode(struct inode *inode)
return udf_update_inode(inode, 1);
}
+static void udf_adjust_time(struct udf_inode_info *iinfo, struct timespec64 time)
+{
+ if (iinfo->i_crtime.tv_sec > time.tv_sec ||
+ (iinfo->i_crtime.tv_sec == time.tv_sec &&
+ iinfo->i_crtime.tv_nsec > time.tv_nsec))
+ iinfo->i_crtime = time;
+}
+
static int udf_update_inode(struct inode *inode, int do_sync)
{
struct buffer_head *bh = NULL;
@@ -1609,11 +1739,11 @@ static int udf_update_inode(struct inode *inode, int do_sync)
unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
struct udf_inode_info *iinfo = UDF_I(inode);
- bh = udf_tgetblk(inode->i_sb,
+ bh = sb_getblk(inode->i_sb,
udf_get_lb_pblock(inode->i_sb, &iinfo->i_location, 0));
if (!bh) {
udf_debug("getblk failure\n");
- return -ENOMEM;
+ return -EIO;
}
lock_buffer(bh);
@@ -1627,46 +1757,39 @@ static int udf_update_inode(struct inode *inode, int do_sync)
use->lengthAllocDescs = cpu_to_le32(iinfo->i_lenAlloc);
memcpy(bh->b_data + sizeof(struct unallocSpaceEntry),
- iinfo->i_ext.i_data, inode->i_sb->s_blocksize -
+ iinfo->i_data, inode->i_sb->s_blocksize -
sizeof(struct unallocSpaceEntry));
use->descTag.tagIdent = cpu_to_le16(TAG_IDENT_USE);
- use->descTag.tagLocation =
- cpu_to_le32(iinfo->i_location.logicalBlockNum);
- crclen = sizeof(struct unallocSpaceEntry) +
- iinfo->i_lenAlloc - sizeof(struct tag);
- use->descTag.descCRCLength = cpu_to_le16(crclen);
- use->descTag.descCRC = cpu_to_le16(crc_itu_t(0, (char *)use +
- sizeof(struct tag),
- crclen));
- use->descTag.tagChecksum = udf_tag_checksum(&use->descTag);
+ crclen = sizeof(struct unallocSpaceEntry);
- goto out;
+ goto finish;
}
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_UID_FORGET))
- fe->uid = cpu_to_le32(-1);
+ fe->uid = cpu_to_le32(UDF_INVALID_ID);
else
fe->uid = cpu_to_le32(i_uid_read(inode));
if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_GID_FORGET))
- fe->gid = cpu_to_le32(-1);
+ fe->gid = cpu_to_le32(UDF_INVALID_ID);
else
fe->gid = cpu_to_le32(i_gid_read(inode));
- udfperms = ((inode->i_mode & S_IRWXO)) |
- ((inode->i_mode & S_IRWXG) << 2) |
- ((inode->i_mode & S_IRWXU) << 4);
+ udfperms = ((inode->i_mode & 0007)) |
+ ((inode->i_mode & 0070) << 2) |
+ ((inode->i_mode & 0700) << 4);
- udfperms |= (le32_to_cpu(fe->permissions) &
- (FE_PERM_O_DELETE | FE_PERM_O_CHATTR |
- FE_PERM_G_DELETE | FE_PERM_G_CHATTR |
- FE_PERM_U_DELETE | FE_PERM_U_CHATTR));
+ udfperms |= iinfo->i_extraPerms;
fe->permissions = cpu_to_le32(udfperms);
- if (S_ISDIR(inode->i_mode))
+ if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0)
fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
- else
- fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
+ else {
+ if (iinfo->i_hidden)
+ fe->fileLinkCount = cpu_to_le16(0);
+ else
+ fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
+ }
fe->informationLength = cpu_to_le64(inode->i_size);
@@ -1687,7 +1810,7 @@ static int udf_update_inode(struct inode *inode, int do_sync)
dsea->impUseLength = cpu_to_le32(sizeof(struct regid));
}
eid = (struct regid *)dsea->impUse;
- memset(eid, 0, sizeof(struct regid));
+ memset(eid, 0, sizeof(*eid));
strcpy(eid->ident, UDF_ID_DEVELOPER);
eid->identSuffix[0] = UDF_OS_CLASS_UNIX;
eid->identSuffix[1] = UDF_OS_ID_LINUX;
@@ -1704,13 +1827,13 @@ static int udf_update_inode(struct inode *inode, int do_sync)
if (iinfo->i_efe == 0) {
memcpy(bh->b_data + sizeof(struct fileEntry),
- iinfo->i_ext.i_data,
+ iinfo->i_data,
inode->i_sb->s_blocksize - sizeof(struct fileEntry));
fe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
- udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
- udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
- udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
+ udf_time_to_disk_stamp(&fe->accessTime, inode_get_atime(inode));
+ udf_time_to_disk_stamp(&fe->modificationTime, inode_get_mtime(inode));
+ udf_time_to_disk_stamp(&fe->attrTime, inode_get_ctime(inode));
memset(&(fe->impIdent), 0, sizeof(struct regid));
strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
@@ -1723,33 +1846,34 @@ static int udf_update_inode(struct inode *inode, int do_sync)
crclen = sizeof(struct fileEntry);
} else {
memcpy(bh->b_data + sizeof(struct extendedFileEntry),
- iinfo->i_ext.i_data,
+ iinfo->i_data,
inode->i_sb->s_blocksize -
sizeof(struct extendedFileEntry));
- efe->objectSize = cpu_to_le64(inode->i_size);
+ efe->objectSize =
+ cpu_to_le64(inode->i_size + iinfo->i_lenStreams);
efe->logicalBlocksRecorded = cpu_to_le64(lb_recorded);
- if (iinfo->i_crtime.tv_sec > inode->i_atime.tv_sec ||
- (iinfo->i_crtime.tv_sec == inode->i_atime.tv_sec &&
- iinfo->i_crtime.tv_nsec > inode->i_atime.tv_nsec))
- iinfo->i_crtime = inode->i_atime;
+ if (iinfo->i_streamdir) {
+ struct long_ad *icb_lad = &efe->streamDirectoryICB;
- if (iinfo->i_crtime.tv_sec > inode->i_mtime.tv_sec ||
- (iinfo->i_crtime.tv_sec == inode->i_mtime.tv_sec &&
- iinfo->i_crtime.tv_nsec > inode->i_mtime.tv_nsec))
- iinfo->i_crtime = inode->i_mtime;
+ icb_lad->extLocation =
+ cpu_to_lelb(iinfo->i_locStreamdir);
+ icb_lad->extLength =
+ cpu_to_le32(inode->i_sb->s_blocksize);
+ }
- if (iinfo->i_crtime.tv_sec > inode->i_ctime.tv_sec ||
- (iinfo->i_crtime.tv_sec == inode->i_ctime.tv_sec &&
- iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
- iinfo->i_crtime = inode->i_ctime;
+ udf_adjust_time(iinfo, inode_get_atime(inode));
+ udf_adjust_time(iinfo, inode_get_mtime(inode));
+ udf_adjust_time(iinfo, inode_get_ctime(inode));
- udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
- udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
+ udf_time_to_disk_stamp(&efe->accessTime,
+ inode_get_atime(inode));
+ udf_time_to_disk_stamp(&efe->modificationTime,
+ inode_get_mtime(inode));
udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
- udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
+ udf_time_to_disk_stamp(&efe->attrTime, inode_get_ctime(inode));
- memset(&(efe->impIdent), 0, sizeof(struct regid));
+ memset(&(efe->impIdent), 0, sizeof(efe->impIdent));
strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
efe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
efe->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
@@ -1760,6 +1884,8 @@ static int udf_update_inode(struct inode *inode, int do_sync)
efe->descTag.tagIdent = cpu_to_le16(TAG_IDENT_EFE);
crclen = sizeof(struct extendedFileEntry);
}
+
+finish:
if (iinfo->i_strat4096) {
fe->icbTag.strategyType = cpu_to_le16(4096);
fe->icbTag.strategyParameter = cpu_to_le16(1);
@@ -1769,7 +1895,9 @@ static int udf_update_inode(struct inode *inode, int do_sync)
fe->icbTag.numEntries = cpu_to_le16(1);
}
- if (S_ISDIR(inode->i_mode))
+ if (iinfo->i_use)
+ fe->icbTag.fileType = ICBTAG_FILE_TYPE_USE;
+ else if (S_ISDIR(inode->i_mode))
fe->icbTag.fileType = ICBTAG_FILE_TYPE_DIRECTORY;
else if (S_ISREG(inode->i_mode))
fe->icbTag.fileType = ICBTAG_FILE_TYPE_REGULAR;
@@ -1806,7 +1934,6 @@ static int udf_update_inode(struct inode *inode, int do_sync)
crclen));
fe->descTag.tagChecksum = udf_tag_checksum(&fe->descTag);
-out:
set_buffer_uptodate(bh);
unlock_buffer(bh);
@@ -1825,54 +1952,125 @@ out:
return err;
}
-struct inode *udf_iget(struct super_block *sb, struct kernel_lb_addr *ino)
+struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino,
+ bool hidden_inode)
{
unsigned long block = udf_get_lb_pblock(sb, ino, 0);
struct inode *inode = iget_locked(sb, block);
+ int err;
if (!inode)
- return NULL;
+ return ERR_PTR(-ENOMEM);
- if (inode->i_state & I_NEW) {
- memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
- __udf_read_inode(inode);
- unlock_new_inode(inode);
+ if (!(inode_state_read_once(inode) & I_NEW)) {
+ if (UDF_I(inode)->i_hidden != hidden_inode) {
+ iput(inode);
+ return ERR_PTR(-EFSCORRUPTED);
+ }
+ return inode;
}
- if (is_bad_inode(inode))
- goto out_iput;
-
- if (ino->logicalBlockNum >= UDF_SB(sb)->
- s_partmaps[ino->partitionReferenceNum].s_partition_len) {
- udf_debug("block=%d, partition=%d out of range\n",
- ino->logicalBlockNum, ino->partitionReferenceNum);
- make_bad_inode(inode);
- goto out_iput;
+ memcpy(&UDF_I(inode)->i_location, ino, sizeof(struct kernel_lb_addr));
+ err = udf_read_inode(inode, hidden_inode);
+ if (err < 0) {
+ iget_failed(inode);
+ return ERR_PTR(err);
}
+ unlock_new_inode(inode);
return inode;
-
- out_iput:
- iput(inode);
- return NULL;
}
-int udf_add_aext(struct inode *inode, struct extent_position *epos,
- struct kernel_lb_addr *eloc, uint32_t elen, int inc)
+int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block,
+ struct extent_position *epos)
{
- int adsize;
- struct short_ad *sad = NULL;
- struct long_ad *lad = NULL;
+ struct super_block *sb = inode->i_sb;
+ struct buffer_head *bh;
struct allocExtDesc *aed;
- uint8_t *ptr;
- struct udf_inode_info *iinfo = UDF_I(inode);
+ struct extent_position nepos;
+ struct kernel_lb_addr neloc;
+ int ver, adsize;
+ int err = 0;
- if (!epos->bh)
- ptr = iinfo->i_ext.i_data + epos->offset -
- udf_file_entry_alloc_offset(inode) +
- iinfo->i_lenEAttr;
+ if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+ adsize = sizeof(struct short_ad);
+ else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+ adsize = sizeof(struct long_ad);
else
- ptr = epos->bh->b_data + epos->offset;
+ return -EIO;
+
+ neloc.logicalBlockNum = block;
+ neloc.partitionReferenceNum = epos->block.partitionReferenceNum;
+
+ bh = sb_getblk(sb, udf_get_lb_pblock(sb, &neloc, 0));
+ if (!bh)
+ return -EIO;
+ lock_buffer(bh);
+ memset(bh->b_data, 0x00, sb->s_blocksize);
+ set_buffer_uptodate(bh);
+ unlock_buffer(bh);
+ mark_buffer_dirty_inode(bh, inode);
+
+ aed = (struct allocExtDesc *)(bh->b_data);
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) {
+ aed->previousAllocExtLocation =
+ cpu_to_le32(epos->block.logicalBlockNum);
+ }
+ aed->lengthAllocDescs = cpu_to_le32(0);
+ if (UDF_SB(sb)->s_udfrev >= 0x0200)
+ ver = 3;
+ else
+ ver = 2;
+ udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block,
+ sizeof(struct tag));
+
+ nepos.block = neloc;
+ nepos.offset = sizeof(struct allocExtDesc);
+ nepos.bh = bh;
+
+ /*
+ * Do we have to copy current last extent to make space for indirect
+ * one?
+ */
+ if (epos->offset + adsize > sb->s_blocksize) {
+ struct kernel_lb_addr cp_loc;
+ uint32_t cp_len;
+ int8_t cp_type;
+
+ epos->offset -= adsize;
+ err = udf_current_aext(inode, epos, &cp_loc, &cp_len, &cp_type, 0);
+ if (err <= 0)
+ goto err_out;
+ cp_len |= ((uint32_t)cp_type) << 30;
+
+ __udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1);
+ udf_write_aext(inode, epos, &nepos.block,
+ sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0);
+ } else {
+ __udf_add_aext(inode, epos, &nepos.block,
+ sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDESCS, 0);
+ }
+
+ brelse(epos->bh);
+ *epos = nepos;
+
+ return 0;
+err_out:
+ brelse(bh);
+ return err;
+}
+
+/*
+ * Append extent at the given position - should be the first free one in inode
+ * / indirect extent. This function assumes there is enough space in the inode
+ * or indirect extent. Use udf_add_aext() if you didn't check for this before.
+ */
+int __udf_add_aext(struct inode *inode, struct extent_position *epos,
+ struct kernel_lb_addr *eloc, uint32_t elen, int inc)
+{
+ struct udf_inode_info *iinfo = UDF_I(inode);
+ struct allocExtDesc *aed;
+ int adsize;
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
adsize = sizeof(struct short_ad);
@@ -1881,88 +2079,14 @@ int udf_add_aext(struct inode *inode, struct extent_position *epos,
else
return -EIO;
- if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
- unsigned char *sptr, *dptr;
- struct buffer_head *nbh;
- int err, loffset;
- struct kernel_lb_addr obloc = epos->block;
-
- epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
- obloc.partitionReferenceNum,
- obloc.logicalBlockNum, &err);
- if (!epos->block.logicalBlockNum)
- return -ENOSPC;
- nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
- &epos->block,
- 0));
- if (!nbh)
- return -EIO;
- lock_buffer(nbh);
- memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
- set_buffer_uptodate(nbh);
- unlock_buffer(nbh);
- mark_buffer_dirty_inode(nbh, inode);
-
- aed = (struct allocExtDesc *)(nbh->b_data);
- if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
- aed->previousAllocExtLocation =
- cpu_to_le32(obloc.logicalBlockNum);
- if (epos->offset + adsize > inode->i_sb->s_blocksize) {
- loffset = epos->offset;
- aed->lengthAllocDescs = cpu_to_le32(adsize);
- sptr = ptr - adsize;
- dptr = nbh->b_data + sizeof(struct allocExtDesc);
- memcpy(dptr, sptr, adsize);
- epos->offset = sizeof(struct allocExtDesc) + adsize;
- } else {
- loffset = epos->offset + adsize;
- aed->lengthAllocDescs = cpu_to_le32(0);
- sptr = ptr;
- epos->offset = sizeof(struct allocExtDesc);
-
- if (epos->bh) {
- aed = (struct allocExtDesc *)epos->bh->b_data;
- le32_add_cpu(&aed->lengthAllocDescs, adsize);
- } else {
- iinfo->i_lenAlloc += adsize;
- mark_inode_dirty(inode);
- }
- }
- if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
- udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
- epos->block.logicalBlockNum, sizeof(struct tag));
- else
- udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
- epos->block.logicalBlockNum, sizeof(struct tag));
- switch (iinfo->i_alloc_type) {
- case ICBTAG_FLAG_AD_SHORT:
- sad = (struct short_ad *)sptr;
- sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
- inode->i_sb->s_blocksize);
- sad->extPosition =
- cpu_to_le32(epos->block.logicalBlockNum);
- break;
- case ICBTAG_FLAG_AD_LONG:
- lad = (struct long_ad *)sptr;
- lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
- inode->i_sb->s_blocksize);
- lad->extLocation = cpu_to_lelb(epos->block);
- memset(lad->impUse, 0x00, sizeof(lad->impUse));
- break;
- }
- if (epos->bh) {
- if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
- UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
- udf_update_tag(epos->bh->b_data, loffset);
- else
- udf_update_tag(epos->bh->b_data,
- sizeof(struct allocExtDesc));
- mark_buffer_dirty_inode(epos->bh, inode);
- brelse(epos->bh);
- } else {
- mark_inode_dirty(inode);
- }
- epos->bh = nbh;
+ if (!epos->bh) {
+ WARN_ON(iinfo->i_lenAlloc !=
+ epos->offset - udf_file_entry_alloc_offset(inode));
+ } else {
+ aed = (struct allocExtDesc *)epos->bh->b_data;
+ WARN_ON(le32_to_cpu(aed->lengthAllocDescs) !=
+ epos->offset - sizeof(struct allocExtDesc));
+ WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize);
}
udf_write_aext(inode, epos, eloc, elen, inc);
@@ -1986,6 +2110,41 @@ int udf_add_aext(struct inode *inode, struct extent_position *epos,
return 0;
}
+/*
+ * Append extent at given position - should be the first free one in inode
+ * / indirect extent. Takes care of allocating and linking indirect blocks.
+ */
+int udf_add_aext(struct inode *inode, struct extent_position *epos,
+ struct kernel_lb_addr *eloc, uint32_t elen, int inc)
+{
+ int adsize;
+ struct super_block *sb = inode->i_sb;
+
+ if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+ adsize = sizeof(struct short_ad);
+ else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+ adsize = sizeof(struct long_ad);
+ else
+ return -EIO;
+
+ if (epos->offset + (2 * adsize) > sb->s_blocksize) {
+ int err;
+ udf_pblk_t new_block;
+
+ new_block = udf_new_block(sb, NULL,
+ epos->block.partitionReferenceNum,
+ epos->block.logicalBlockNum, &err);
+ if (!new_block)
+ return -ENOSPC;
+
+ err = udf_setup_indirect_aext(inode, new_block, epos);
+ if (err)
+ return err;
+ }
+
+ return __udf_add_aext(inode, epos, eloc, elen, inc);
+}
+
void udf_write_aext(struct inode *inode, struct extent_position *epos,
struct kernel_lb_addr *eloc, uint32_t elen, int inc)
{
@@ -1996,7 +2155,7 @@ void udf_write_aext(struct inode *inode, struct extent_position *epos,
struct udf_inode_info *iinfo = UDF_I(inode);
if (!epos->bh)
- ptr = iinfo->i_ext.i_data + epos->offset -
+ ptr = iinfo->i_data + epos->offset -
udf_file_entry_alloc_offset(inode) +
iinfo->i_lenEAttr;
else
@@ -2038,33 +2197,58 @@ void udf_write_aext(struct inode *inode, struct extent_position *epos,
epos->offset += adsize;
}
-int8_t udf_next_aext(struct inode *inode, struct extent_position *epos,
- struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
+/*
+ * Only 1 indirect extent in a row really makes sense but allow upto 16 in case
+ * someone does some weird stuff.
+ */
+#define UDF_MAX_INDIR_EXTS 16
+
+/*
+ * Returns 1 on success, -errno on error, 0 on hit EOF.
+ */
+int udf_next_aext(struct inode *inode, struct extent_position *epos,
+ struct kernel_lb_addr *eloc, uint32_t *elen, int8_t *etype,
+ int inc)
{
- int8_t etype;
+ unsigned int indirections = 0;
+ int ret = 0;
+ udf_pblk_t block;
+
+ while (1) {
+ ret = udf_current_aext(inode, epos, eloc, elen,
+ etype, inc);
+ if (ret <= 0)
+ return ret;
+ if (*etype != (EXT_NEXT_EXTENT_ALLOCDESCS >> 30))
+ return ret;
+
+ if (++indirections > UDF_MAX_INDIR_EXTS) {
+ udf_err(inode->i_sb,
+ "too many indirect extents in inode %lu\n",
+ inode->i_ino);
+ return -EFSCORRUPTED;
+ }
- while ((etype = udf_current_aext(inode, epos, eloc, elen, inc)) ==
- (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
- int block;
epos->block = *eloc;
epos->offset = sizeof(struct allocExtDesc);
brelse(epos->bh);
block = udf_get_lb_pblock(inode->i_sb, &epos->block, 0);
- epos->bh = udf_tread(inode->i_sb, block);
+ epos->bh = sb_bread(inode->i_sb, block);
if (!epos->bh) {
- udf_debug("reading block %d failed!\n", block);
- return -1;
+ udf_debug("reading block %u failed!\n", block);
+ return -EIO;
}
}
-
- return etype;
}
-int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
- struct kernel_lb_addr *eloc, uint32_t *elen, int inc)
+/*
+ * Returns 1 on success, -errno on error, 0 on hit EOF.
+ */
+int udf_current_aext(struct inode *inode, struct extent_position *epos,
+ struct kernel_lb_addr *eloc, uint32_t *elen, int8_t *etype,
+ int inc)
{
int alen;
- int8_t etype;
uint8_t *ptr;
struct short_ad *sad;
struct long_ad *lad;
@@ -2073,26 +2257,32 @@ int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
if (!epos->bh) {
if (!epos->offset)
epos->offset = udf_file_entry_alloc_offset(inode);
- ptr = iinfo->i_ext.i_data + epos->offset -
+ ptr = iinfo->i_data + epos->offset -
udf_file_entry_alloc_offset(inode) +
iinfo->i_lenEAttr;
alen = udf_file_entry_alloc_offset(inode) +
iinfo->i_lenAlloc;
} else {
+ struct allocExtDesc *header =
+ (struct allocExtDesc *)epos->bh->b_data;
+
if (!epos->offset)
epos->offset = sizeof(struct allocExtDesc);
ptr = epos->bh->b_data + epos->offset;
- alen = sizeof(struct allocExtDesc) +
- le32_to_cpu(((struct allocExtDesc *)epos->bh->b_data)->
- lengthAllocDescs);
+ if (check_add_overflow(sizeof(struct allocExtDesc),
+ le32_to_cpu(header->lengthAllocDescs), &alen))
+ return -1;
+
+ if (alen > epos->bh->b_size)
+ return -1;
}
switch (iinfo->i_alloc_type) {
case ICBTAG_FLAG_AD_SHORT:
sad = udf_get_fileshortad(ptr, alen, &epos->offset, inc);
if (!sad)
- return -1;
- etype = le32_to_cpu(sad->extLength) >> 30;
+ return 0;
+ *etype = le32_to_cpu(sad->extLength) >> 30;
eloc->logicalBlockNum = le32_to_cpu(sad->extPosition);
eloc->partitionReferenceNum =
iinfo->i_location.partitionReferenceNum;
@@ -2101,48 +2291,55 @@ int8_t udf_current_aext(struct inode *inode, struct extent_position *epos,
case ICBTAG_FLAG_AD_LONG:
lad = udf_get_filelongad(ptr, alen, &epos->offset, inc);
if (!lad)
- return -1;
- etype = le32_to_cpu(lad->extLength) >> 30;
+ return 0;
+ *etype = le32_to_cpu(lad->extLength) >> 30;
*eloc = lelb_to_cpu(lad->extLocation);
*elen = le32_to_cpu(lad->extLength) & UDF_EXTENT_LENGTH_MASK;
break;
default:
- udf_debug("alloc_type = %d unsupported\n", iinfo->i_alloc_type);
- return -1;
+ udf_debug("alloc_type = %u unsupported\n", iinfo->i_alloc_type);
+ return -EINVAL;
}
- return etype;
+ return 1;
}
-static int8_t udf_insert_aext(struct inode *inode, struct extent_position epos,
- struct kernel_lb_addr neloc, uint32_t nelen)
+static int udf_insert_aext(struct inode *inode, struct extent_position epos,
+ struct kernel_lb_addr neloc, uint32_t nelen)
{
struct kernel_lb_addr oeloc;
uint32_t oelen;
int8_t etype;
+ int ret;
if (epos.bh)
get_bh(epos.bh);
- while ((etype = udf_next_aext(inode, &epos, &oeloc, &oelen, 0)) != -1) {
+ while (1) {
+ ret = udf_next_aext(inode, &epos, &oeloc, &oelen, &etype, 0);
+ if (ret <= 0)
+ break;
udf_write_aext(inode, &epos, &neloc, nelen, 1);
neloc = oeloc;
nelen = (etype << 30) | oelen;
}
- udf_add_aext(inode, &epos, &neloc, nelen, 1);
+ if (ret == 0)
+ ret = udf_add_aext(inode, &epos, &neloc, nelen, 1);
brelse(epos.bh);
- return (nelen >> 30);
+ return ret;
}
-int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
- struct kernel_lb_addr eloc, uint32_t elen)
+int8_t udf_delete_aext(struct inode *inode, struct extent_position epos)
{
struct extent_position oepos;
int adsize;
int8_t etype;
struct allocExtDesc *aed;
struct udf_inode_info *iinfo;
+ struct kernel_lb_addr eloc;
+ uint32_t elen;
+ int ret;
if (epos.bh) {
get_bh(epos.bh);
@@ -2158,10 +2355,18 @@ int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
adsize = 0;
oepos = epos;
- if (udf_next_aext(inode, &epos, &eloc, &elen, 1) == -1)
+ if (udf_next_aext(inode, &epos, &eloc, &elen, &etype, 1) <= 0)
return -1;
- while ((etype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
+ while (1) {
+ ret = udf_next_aext(inode, &epos, &eloc, &elen, &etype, 1);
+ if (ret < 0) {
+ brelse(epos.bh);
+ brelse(oepos.bh);
+ return -1;
+ }
+ if (ret == 0)
+ break;
udf_write_aext(inode, &oepos, &eloc, (etype << 30) | elen, 1);
if (oepos.bh != epos.bh) {
oepos.block = epos.block;
@@ -2218,15 +2423,17 @@ int8_t udf_delete_aext(struct inode *inode, struct extent_position epos,
return (elen >> 30);
}
-int8_t inode_bmap(struct inode *inode, sector_t block,
- struct extent_position *pos, struct kernel_lb_addr *eloc,
- uint32_t *elen, sector_t *offset)
+/*
+ * Returns 1 on success, -errno on error, 0 on hit EOF.
+ */
+int inode_bmap(struct inode *inode, sector_t block, struct extent_position *pos,
+ struct kernel_lb_addr *eloc, uint32_t *elen, sector_t *offset,
+ int8_t *etype)
{
unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
- loff_t lbcount = 0, bcount =
- (loff_t) block << blocksize_bits;
- int8_t etype;
+ loff_t lbcount = 0, bcount = (loff_t) block << blocksize_bits;
struct udf_inode_info *iinfo;
+ int err = 0;
iinfo = UDF_I(inode);
if (!udf_read_extent_cache(inode, bcount, &lbcount, pos)) {
@@ -2236,42 +2443,19 @@ int8_t inode_bmap(struct inode *inode, sector_t block,
}
*elen = 0;
do {
- etype = udf_next_aext(inode, pos, eloc, elen, 1);
- if (etype == -1) {
- *offset = (bcount - lbcount) >> blocksize_bits;
- iinfo->i_lenExtents = lbcount;
- return -1;
+ err = udf_next_aext(inode, pos, eloc, elen, etype, 1);
+ if (err <= 0) {
+ if (err == 0) {
+ *offset = (bcount - lbcount) >> blocksize_bits;
+ iinfo->i_lenExtents = lbcount;
+ }
+ return err;
}
lbcount += *elen;
} while (lbcount <= bcount);
/* update extent cache */
- udf_update_extent_cache(inode, lbcount - *elen, pos, 1);
+ udf_update_extent_cache(inode, lbcount - *elen, pos);
*offset = (bcount + *elen - lbcount) >> blocksize_bits;
- return etype;
-}
-
-long udf_block_map(struct inode *inode, sector_t block)
-{
- struct kernel_lb_addr eloc;
- uint32_t elen;
- sector_t offset;
- struct extent_position epos = {};
- int ret;
-
- down_read(&UDF_I(inode)->i_data_sem);
-
- if (inode_bmap(inode, block, &epos, &eloc, &elen, &offset) ==
- (EXT_RECORDED_ALLOCATED >> 30))
- ret = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
- else
- ret = 0;
-
- up_read(&UDF_I(inode)->i_data_sem);
- brelse(epos.bh);
-
- if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_VARCONV))
- return udf_fixed_to_variable(ret);
- else
- return ret;
+ return 1;
}
diff --git a/fs/udf/lowlevel.c b/fs/udf/lowlevel.c
index 6583fe9b0645..9d847a7a0905 100644
--- a/fs/udf/lowlevel.c
+++ b/fs/udf/lowlevel.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* lowlevel.c
*
@@ -5,11 +6,6 @@
* Low Level Device Routines for the UDF filesystem
*
* COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
- *
* (C) 1999-2001 Ben Fennema
*
* HISTORY
@@ -21,47 +17,46 @@
#include <linux/blkdev.h>
#include <linux/cdrom.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include "udf_sb.h"
unsigned int udf_get_last_session(struct super_block *sb)
{
+ struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
struct cdrom_multisession ms_info;
- unsigned int vol_desc_start;
- struct block_device *bdev = sb->s_bdev;
- int i;
- vol_desc_start = 0;
- ms_info.addr_format = CDROM_LBA;
- i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long)&ms_info);
+ if (!cdi) {
+ udf_debug("CDROMMULTISESSION not supported.\n");
+ return 0;
+ }
- if (i == 0) {
+ ms_info.addr_format = CDROM_LBA;
+ if (cdrom_multisession(cdi, &ms_info) == 0) {
udf_debug("XA disk: %s, vol_desc_start=%d\n",
ms_info.xa_flag ? "yes" : "no", ms_info.addr.lba);
if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
- vol_desc_start = ms_info.addr.lba;
- } else {
- udf_debug("CDROMMULTISESSION not supported: rc=%d\n", i);
+ return ms_info.addr.lba;
}
- return vol_desc_start;
+ return 0;
}
-unsigned long udf_get_last_block(struct super_block *sb)
+udf_pblk_t udf_get_last_block(struct super_block *sb)
{
- struct block_device *bdev = sb->s_bdev;
+ struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
unsigned long lblock = 0;
/*
- * ioctl failed or returned obviously bogus value?
+ * The cdrom layer call failed or returned obviously bogus value?
* Try using the device size...
*/
- if (ioctl_by_bdev(bdev, CDROM_LAST_WRITTEN, (unsigned long) &lblock) ||
- lblock == 0)
- lblock = bdev->bd_inode->i_size >> sb->s_blocksize_bits;
+ if (!cdi || cdrom_get_last_written(cdi, &lblock) || lblock == 0) {
+ if (sb_bdev_nr_blocks(sb) > ~(udf_pblk_t)0)
+ return 0;
+ lblock = sb_bdev_nr_blocks(sb);
+ }
if (lblock)
return lblock - 1;
- else
- return 0;
+ return 0;
}
diff --git a/fs/udf/misc.c b/fs/udf/misc.c
index c175b4dabc14..0788593b6a1d 100644
--- a/fs/udf/misc.c
+++ b/fs/udf/misc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* misc.c
*
@@ -5,11 +6,6 @@
* Miscellaneous routines for the OSTA-UDF(tm) filesystem.
*
* COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
- *
* (C) 1998 Dave Boynton
* (C) 1998-2004 Ben Fennema
* (C) 1999-2000 Stelias Computing Inc
@@ -23,28 +19,11 @@
#include <linux/fs.h>
#include <linux/string.h>
-#include <linux/buffer_head.h>
#include <linux/crc-itu-t.h>
#include "udf_i.h"
#include "udf_sb.h"
-struct buffer_head *udf_tgetblk(struct super_block *sb, int block)
-{
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV))
- return sb_getblk(sb, udf_fixed_to_variable(block));
- else
- return sb_getblk(sb, block);
-}
-
-struct buffer_head *udf_tread(struct super_block *sb, int block)
-{
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV))
- return sb_bread(sb, udf_fixed_to_variable(block));
- else
- return sb_bread(sb, block);
-}
-
struct genericFormat *udf_add_extendedattr(struct inode *inode, uint32_t size,
uint32_t type, uint8_t loc)
{
@@ -53,9 +32,9 @@ struct genericFormat *udf_add_extendedattr(struct inode *inode, uint32_t size,
uint16_t crclen;
struct udf_inode_info *iinfo = UDF_I(inode);
- ea = iinfo->i_ext.i_data;
+ ea = iinfo->i_data;
if (iinfo->i_lenEAttr) {
- ad = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
+ ad = iinfo->i_data + iinfo->i_lenEAttr;
} else {
ad = ea;
size += sizeof(struct extendedAttrHeaderDesc);
@@ -142,8 +121,6 @@ struct genericFormat *udf_add_extendedattr(struct inode *inode, uint32_t size,
iinfo->i_lenEAttr += size;
return (struct genericFormat *)&ea[offset];
}
- if (loc & 0x02)
- ;
return NULL;
}
@@ -156,7 +133,7 @@ struct genericFormat *udf_get_extendedattr(struct inode *inode, uint32_t type,
uint32_t offset;
struct udf_inode_info *iinfo = UDF_I(inode);
- ea = iinfo->i_ext.i_data;
+ ea = iinfo->i_data;
if (iinfo->i_lenEAttr) {
struct extendedAttrHeaderDesc *eahd;
@@ -176,13 +153,22 @@ struct genericFormat *udf_get_extendedattr(struct inode *inode, uint32_t type,
else
offset = le32_to_cpu(eahd->appAttrLocation);
- while (offset < iinfo->i_lenEAttr) {
+ while (offset + sizeof(*gaf) < iinfo->i_lenEAttr) {
+ uint32_t attrLength;
+
gaf = (struct genericFormat *)&ea[offset];
+ attrLength = le32_to_cpu(gaf->attrLength);
+
+ /* Detect undersized elements and buffer overflows */
+ if ((attrLength < sizeof(*gaf)) ||
+ (attrLength > (iinfo->i_lenEAttr - offset)))
+ break;
+
if (le32_to_cpu(gaf->attrType) == type &&
gaf->attrSubtype == subtype)
return gaf;
else
- offset += le32_to_cpu(gaf->attrLength);
+ offset += attrLength;
}
}
@@ -210,9 +196,9 @@ struct buffer_head *udf_read_tagged(struct super_block *sb, uint32_t block,
if (block == 0xFFFFFFFF)
return NULL;
- bh = udf_tread(sb, block);
+ bh = sb_bread(sb, block);
if (!bh) {
- udf_err(sb, "read failed, block=%u, location=%d\n",
+ udf_err(sb, "read failed, block=%u, location=%u\n",
block, location);
return NULL;
}
@@ -250,7 +236,7 @@ struct buffer_head *udf_read_tagged(struct super_block *sb, uint32_t block,
le16_to_cpu(tag_p->descCRCLength)))
return bh;
- udf_debug("Crc failure block %d: crc = %d, crclen = %d\n", block,
+ udf_debug("Crc failure block %u: crc = %u, crclen = %u\n", block,
le16_to_cpu(tag_p->descCRC),
le16_to_cpu(tag_p->descCRCLength));
error_out:
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 5f6fc17d6bc5..5f2e9a892bff 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* namei.c
*
@@ -5,11 +6,6 @@
* Inode name handling routines for the OSTA-UDF(tm) filesystem.
*
* COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
- *
* (C) 1998-2004 Ben Fennema
* (C) 1999-2000 Stelias Computing Inc
*
@@ -27,10 +23,10 @@
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/slab.h>
-#include <linux/buffer_head.h>
#include <linux/sched.h>
#include <linux/crc-itu-t.h>
#include <linux/exportfs.h>
+#include <linux/iversion.h>
static inline int udf_match(int len1, const unsigned char *name1, int len2,
const unsigned char *name2)
@@ -41,871 +37,569 @@ static inline int udf_match(int len1, const unsigned char *name1, int len2,
return !memcmp(name1, name2, len1);
}
-int udf_write_fi(struct inode *inode, struct fileIdentDesc *cfi,
- struct fileIdentDesc *sfi, struct udf_fileident_bh *fibh,
- uint8_t *impuse, uint8_t *fileident)
-{
- uint16_t crclen = fibh->eoffset - fibh->soffset - sizeof(struct tag);
- uint16_t crc;
- int offset;
- uint16_t liu = le16_to_cpu(cfi->lengthOfImpUse);
- uint8_t lfi = cfi->lengthFileIdent;
- int padlen = fibh->eoffset - fibh->soffset - liu - lfi -
- sizeof(struct fileIdentDesc);
- int adinicb = 0;
-
- if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- adinicb = 1;
-
- offset = fibh->soffset + sizeof(struct fileIdentDesc);
-
- if (impuse) {
- if (adinicb || (offset + liu < 0)) {
- memcpy((uint8_t *)sfi->impUse, impuse, liu);
- } else if (offset >= 0) {
- memcpy(fibh->ebh->b_data + offset, impuse, liu);
- } else {
- memcpy((uint8_t *)sfi->impUse, impuse, -offset);
- memcpy(fibh->ebh->b_data, impuse - offset,
- liu + offset);
- }
- }
-
- offset += liu;
-
- if (fileident) {
- if (adinicb || (offset + lfi < 0)) {
- memcpy((uint8_t *)sfi->fileIdent + liu, fileident, lfi);
- } else if (offset >= 0) {
- memcpy(fibh->ebh->b_data + offset, fileident, lfi);
- } else {
- memcpy((uint8_t *)sfi->fileIdent + liu, fileident,
- -offset);
- memcpy(fibh->ebh->b_data, fileident - offset,
- lfi + offset);
- }
- }
-
- offset += lfi;
-
- if (adinicb || (offset + padlen < 0)) {
- memset((uint8_t *)sfi->padding + liu + lfi, 0x00, padlen);
- } else if (offset >= 0) {
- memset(fibh->ebh->b_data + offset, 0x00, padlen);
- } else {
- memset((uint8_t *)sfi->padding + liu + lfi, 0x00, -offset);
- memset(fibh->ebh->b_data, 0x00, padlen + offset);
- }
-
- crc = crc_itu_t(0, (uint8_t *)cfi + sizeof(struct tag),
- sizeof(struct fileIdentDesc) - sizeof(struct tag));
-
- if (fibh->sbh == fibh->ebh) {
- crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
- crclen + sizeof(struct tag) -
- sizeof(struct fileIdentDesc));
- } else if (sizeof(struct fileIdentDesc) >= -fibh->soffset) {
- crc = crc_itu_t(crc, fibh->ebh->b_data +
- sizeof(struct fileIdentDesc) +
- fibh->soffset,
- crclen + sizeof(struct tag) -
- sizeof(struct fileIdentDesc));
- } else {
- crc = crc_itu_t(crc, (uint8_t *)sfi->impUse,
- -fibh->soffset - sizeof(struct fileIdentDesc));
- crc = crc_itu_t(crc, fibh->ebh->b_data, fibh->eoffset);
- }
-
- cfi->descTag.descCRC = cpu_to_le16(crc);
- cfi->descTag.descCRCLength = cpu_to_le16(crclen);
- cfi->descTag.tagChecksum = udf_tag_checksum(&cfi->descTag);
-
- if (adinicb || (sizeof(struct fileIdentDesc) <= -fibh->soffset)) {
- memcpy((uint8_t *)sfi, (uint8_t *)cfi,
- sizeof(struct fileIdentDesc));
- } else {
- memcpy((uint8_t *)sfi, (uint8_t *)cfi, -fibh->soffset);
- memcpy(fibh->ebh->b_data, (uint8_t *)cfi - fibh->soffset,
- sizeof(struct fileIdentDesc) + fibh->soffset);
- }
-
- if (adinicb) {
- mark_inode_dirty(inode);
- } else {
- if (fibh->sbh != fibh->ebh)
- mark_buffer_dirty_inode(fibh->ebh, inode);
- mark_buffer_dirty_inode(fibh->sbh, inode);
- }
- return 0;
-}
-
-static struct fileIdentDesc *udf_find_entry(struct inode *dir,
- const struct qstr *child,
- struct udf_fileident_bh *fibh,
- struct fileIdentDesc *cfi)
+/**
+ * udf_fiiter_find_entry - find entry in given directory.
+ *
+ * @dir: directory inode to search in
+ * @child: qstr of the name
+ * @iter: iter to use for searching
+ *
+ * This function searches in the directory @dir for a file name @child. When
+ * found, @iter points to the position in the directory with given entry.
+ *
+ * Returns 0 on success, < 0 on error (including -ENOENT).
+ */
+static int udf_fiiter_find_entry(struct inode *dir, const struct qstr *child,
+ struct udf_fileident_iter *iter)
{
- struct fileIdentDesc *fi = NULL;
- loff_t f_pos;
- int block, flen;
+ int flen;
unsigned char *fname = NULL;
- unsigned char *nameptr;
- uint8_t lfi;
- uint16_t liu;
- loff_t size;
- struct kernel_lb_addr eloc;
- uint32_t elen;
- sector_t offset;
- struct extent_position epos = {};
- struct udf_inode_info *dinfo = UDF_I(dir);
+ struct super_block *sb = dir->i_sb;
int isdotdot = child->len == 2 &&
child->name[0] == '.' && child->name[1] == '.';
+ int ret;
- size = udf_ext0_offset(dir) + dir->i_size;
- f_pos = udf_ext0_offset(dir);
-
- fibh->sbh = fibh->ebh = NULL;
- fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
- if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
- if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
- &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30))
- goto out_err;
- block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
- if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- epos.offset -= sizeof(struct short_ad);
- else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- epos.offset -= sizeof(struct long_ad);
- } else
- offset = 0;
-
- fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
- if (!fibh->sbh)
- goto out_err;
- }
-
- fname = kmalloc(UDF_NAME_LEN, GFP_NOFS);
+ fname = kmalloc(UDF_NAME_LEN, GFP_KERNEL);
if (!fname)
- goto out_err;
-
- while (f_pos < size) {
- fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
- &elen, &offset);
- if (!fi)
- goto out_err;
+ return -ENOMEM;
- liu = le16_to_cpu(cfi->lengthOfImpUse);
- lfi = cfi->lengthFileIdent;
-
- if (fibh->sbh == fibh->ebh) {
- nameptr = fi->fileIdent + liu;
- } else {
- int poffset; /* Unpaded ending offset */
-
- poffset = fibh->soffset + sizeof(struct fileIdentDesc) +
- liu + lfi;
-
- if (poffset >= lfi)
- nameptr = (uint8_t *)(fibh->ebh->b_data +
- poffset - lfi);
- else {
- nameptr = fname;
- memcpy(nameptr, fi->fileIdent + liu,
- lfi - poffset);
- memcpy(nameptr + lfi - poffset,
- fibh->ebh->b_data, poffset);
- }
- }
-
- if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
- if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNDELETE))
+ for (ret = udf_fiiter_init(iter, dir, 0);
+ !ret && iter->pos < dir->i_size;
+ ret = udf_fiiter_advance(iter)) {
+ if (iter->fi.fileCharacteristics & FID_FILE_CHAR_DELETED) {
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNDELETE))
continue;
}
- if ((cfi->fileCharacteristics & FID_FILE_CHAR_HIDDEN) != 0) {
- if (!UDF_QUERY_FLAG(dir->i_sb, UDF_FLAG_UNHIDE))
+ if (iter->fi.fileCharacteristics & FID_FILE_CHAR_HIDDEN) {
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_UNHIDE))
continue;
}
- if ((cfi->fileCharacteristics & FID_FILE_CHAR_PARENT) &&
+ if ((iter->fi.fileCharacteristics & FID_FILE_CHAR_PARENT) &&
isdotdot)
goto out_ok;
- if (!lfi)
+ if (!iter->fi.lengthFileIdent)
continue;
- flen = udf_get_filename(dir->i_sb, nameptr, fname, lfi);
- if (flen && udf_match(flen, fname, child->len, child->name))
+ flen = udf_get_filename(sb, iter->name,
+ iter->fi.lengthFileIdent, fname, UDF_NAME_LEN);
+ if (flen < 0) {
+ ret = flen;
+ goto out_err;
+ }
+
+ if (udf_match(flen, fname, child->len, child->name))
goto out_ok;
}
+ if (!ret)
+ ret = -ENOENT;
out_err:
- fi = NULL;
- if (fibh->sbh != fibh->ebh)
- brelse(fibh->ebh);
- brelse(fibh->sbh);
+ udf_fiiter_release(iter);
out_ok:
- brelse(epos.bh);
kfree(fname);
- return fi;
+ return ret;
}
static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
unsigned int flags)
{
struct inode *inode = NULL;
- struct fileIdentDesc cfi;
- struct udf_fileident_bh fibh;
+ struct udf_fileident_iter iter;
+ int err;
- if (dentry->d_name.len > UDF_NAME_LEN - 2)
+ if (dentry->d_name.len > UDF_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
-#ifdef UDF_RECOVERY
- /* temporary shorthand for specifying files by inode number */
- if (!strncmp(dentry->d_name.name, ".B=", 3)) {
- struct kernel_lb_addr lb = {
- .logicalBlockNum = 0,
- .partitionReferenceNum =
- simple_strtoul(dentry->d_name.name + 3,
- NULL, 0),
- };
- inode = udf_iget(dir->i_sb, lb);
- if (!inode) {
- return ERR_PTR(-EACCES);
- }
- } else
-#endif /* UDF_RECOVERY */
+ err = udf_fiiter_find_entry(dir, &dentry->d_name, &iter);
+ if (err < 0 && err != -ENOENT)
+ return ERR_PTR(err);
- if (udf_find_entry(dir, &dentry->d_name, &fibh, &cfi)) {
+ if (err == 0) {
struct kernel_lb_addr loc;
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
+ loc = lelb_to_cpu(iter.fi.icb.extLocation);
+ udf_fiiter_release(&iter);
- loc = lelb_to_cpu(cfi.icb.extLocation);
inode = udf_iget(dir->i_sb, &loc);
- if (!inode) {
- return ERR_PTR(-EACCES);
- }
}
return d_splice_alias(inode, dentry);
}
-static struct fileIdentDesc *udf_add_entry(struct inode *dir,
- struct dentry *dentry,
- struct udf_fileident_bh *fibh,
- struct fileIdentDesc *cfi, int *err)
+static int udf_expand_dir_adinicb(struct inode *inode, udf_pblk_t *block)
{
- struct super_block *sb = dir->i_sb;
- struct fileIdentDesc *fi = NULL;
- unsigned char *name = NULL;
- int namelen;
- loff_t f_pos;
- loff_t size = udf_ext0_offset(dir) + dir->i_size;
- int nfidlen;
- uint8_t lfi;
- uint16_t liu;
- int block;
+ udf_pblk_t newblock;
+ struct buffer_head *dbh = NULL;
struct kernel_lb_addr eloc;
- uint32_t elen = 0;
- sector_t offset;
- struct extent_position epos = {};
- struct udf_inode_info *dinfo;
+ struct extent_position epos;
+ uint8_t alloctype;
+ struct udf_inode_info *iinfo = UDF_I(inode);
+ struct udf_fileident_iter iter;
+ uint8_t *impuse;
+ int ret;
+
+ if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
+ alloctype = ICBTAG_FLAG_AD_SHORT;
+ else
+ alloctype = ICBTAG_FLAG_AD_LONG;
- fibh->sbh = fibh->ebh = NULL;
- name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
- if (!name) {
- *err = -ENOMEM;
- goto out_err;
+ if (!inode->i_size) {
+ iinfo->i_alloc_type = alloctype;
+ mark_inode_dirty(inode);
+ return 0;
}
- if (dentry) {
- if (!dentry->d_name.len) {
- *err = -EINVAL;
- goto out_err;
- }
- namelen = udf_put_filename(sb, dentry->d_name.name, name,
- dentry->d_name.len);
- if (!namelen) {
- *err = -ENAMETOOLONG;
- goto out_err;
- }
- } else {
- namelen = 0;
+ /* alloc block, and copy data to it */
+ *block = udf_new_block(inode->i_sb, inode,
+ iinfo->i_location.partitionReferenceNum,
+ iinfo->i_location.logicalBlockNum, &ret);
+ if (!(*block))
+ return ret;
+ newblock = udf_get_pblock(inode->i_sb, *block,
+ iinfo->i_location.partitionReferenceNum,
+ 0);
+ if (newblock == 0xffffffff)
+ return -EFSCORRUPTED;
+ dbh = sb_getblk(inode->i_sb, newblock);
+ if (!dbh)
+ return -ENOMEM;
+ lock_buffer(dbh);
+ memcpy(dbh->b_data, iinfo->i_data, inode->i_size);
+ memset(dbh->b_data + inode->i_size, 0,
+ inode->i_sb->s_blocksize - inode->i_size);
+ set_buffer_uptodate(dbh);
+ unlock_buffer(dbh);
+
+ /* Drop inline data, add block instead */
+ iinfo->i_alloc_type = alloctype;
+ memset(iinfo->i_data + iinfo->i_lenEAttr, 0, iinfo->i_lenAlloc);
+ iinfo->i_lenAlloc = 0;
+ eloc.logicalBlockNum = *block;
+ eloc.partitionReferenceNum =
+ iinfo->i_location.partitionReferenceNum;
+ iinfo->i_lenExtents = inode->i_size;
+ epos.bh = NULL;
+ epos.block = iinfo->i_location;
+ epos.offset = udf_file_entry_alloc_offset(inode);
+ ret = udf_add_aext(inode, &epos, &eloc, inode->i_size, 0);
+ brelse(epos.bh);
+ if (ret < 0) {
+ brelse(dbh);
+ udf_free_blocks(inode->i_sb, inode, &eloc, 0, 1);
+ return ret;
}
+ mark_inode_dirty(inode);
- nfidlen = (sizeof(struct fileIdentDesc) + namelen + 3) & ~3;
-
- f_pos = udf_ext0_offset(dir);
-
- fibh->soffset = fibh->eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
- dinfo = UDF_I(dir);
- if (dinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
- if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits, &epos,
- &eloc, &elen, &offset) != (EXT_RECORDED_ALLOCATED >> 30)) {
- block = udf_get_lb_pblock(dir->i_sb,
- &dinfo->i_location, 0);
- fibh->soffset = fibh->eoffset = sb->s_blocksize;
- goto add;
- }
- block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
- if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- epos.offset -= sizeof(struct short_ad);
- else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- epos.offset -= sizeof(struct long_ad);
- } else
- offset = 0;
-
- fibh->sbh = fibh->ebh = udf_tread(dir->i_sb, block);
- if (!fibh->sbh) {
- *err = -EIO;
- goto out_err;
- }
-
- block = dinfo->i_location.logicalBlockNum;
+ /* Now fixup tags in moved directory entries */
+ for (ret = udf_fiiter_init(&iter, inode, 0);
+ !ret && iter.pos < inode->i_size;
+ ret = udf_fiiter_advance(&iter)) {
+ iter.fi.descTag.tagLocation = cpu_to_le32(*block);
+ if (iter.fi.lengthOfImpUse != cpu_to_le16(0))
+ impuse = dbh->b_data + iter.pos +
+ sizeof(struct fileIdentDesc);
+ else
+ impuse = NULL;
+ udf_fiiter_write_fi(&iter, impuse);
}
+ brelse(dbh);
+ /*
+ * We don't expect the iteration to fail as the directory has been
+ * already verified to be correct
+ */
+ WARN_ON_ONCE(ret);
+ udf_fiiter_release(&iter);
- while (f_pos < size) {
- fi = udf_fileident_read(dir, &f_pos, fibh, cfi, &epos, &eloc,
- &elen, &offset);
+ return 0;
+}
- if (!fi) {
- *err = -EIO;
- goto out_err;
- }
+static int udf_fiiter_add_entry(struct inode *dir, struct dentry *dentry,
+ struct udf_fileident_iter *iter)
+{
+ struct udf_inode_info *dinfo = UDF_I(dir);
+ int nfidlen, namelen = 0;
+ int ret;
+ int off, blksize = 1 << dir->i_blkbits;
+ udf_pblk_t block;
+ char name[UDF_NAME_LEN_CS0];
- liu = le16_to_cpu(cfi->lengthOfImpUse);
- lfi = cfi->lengthFileIdent;
-
- if ((cfi->fileCharacteristics & FID_FILE_CHAR_DELETED) != 0) {
- if (((sizeof(struct fileIdentDesc) +
- liu + lfi + 3) & ~3) == nfidlen) {
- cfi->descTag.tagSerialNum = cpu_to_le16(1);
- cfi->fileVersionNum = cpu_to_le16(1);
- cfi->fileCharacteristics = 0;
- cfi->lengthFileIdent = namelen;
- cfi->lengthOfImpUse = cpu_to_le16(0);
- if (!udf_write_fi(dir, cfi, fi, fibh, NULL,
- name))
- goto out_ok;
- else {
- *err = -EIO;
- goto out_err;
- }
+ if (dentry) {
+ namelen = udf_put_filename(dir->i_sb, dentry->d_name.name,
+ dentry->d_name.len,
+ name, UDF_NAME_LEN_CS0);
+ if (!namelen)
+ return -ENAMETOOLONG;
+ }
+ nfidlen = ALIGN(sizeof(struct fileIdentDesc) + namelen, UDF_NAME_PAD);
+
+ for (ret = udf_fiiter_init(iter, dir, 0);
+ !ret && iter->pos < dir->i_size;
+ ret = udf_fiiter_advance(iter)) {
+ if (iter->fi.fileCharacteristics & FID_FILE_CHAR_DELETED) {
+ if (udf_dir_entry_len(&iter->fi) == nfidlen) {
+ iter->fi.descTag.tagSerialNum = cpu_to_le16(1);
+ iter->fi.fileVersionNum = cpu_to_le16(1);
+ iter->fi.fileCharacteristics = 0;
+ iter->fi.lengthFileIdent = namelen;
+ iter->fi.lengthOfImpUse = cpu_to_le16(0);
+ memcpy(iter->namebuf, name, namelen);
+ iter->name = iter->namebuf;
+ return 0;
}
}
}
-
-add:
- f_pos += nfidlen;
-
+ if (ret) {
+ udf_fiiter_release(iter);
+ return ret;
+ }
if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB &&
- sb->s_blocksize - fibh->eoffset < nfidlen) {
- brelse(epos.bh);
- epos.bh = NULL;
- fibh->soffset -= udf_ext0_offset(dir);
- fibh->eoffset -= udf_ext0_offset(dir);
- f_pos -= udf_ext0_offset(dir);
- if (fibh->sbh != fibh->ebh)
- brelse(fibh->ebh);
- brelse(fibh->sbh);
- fibh->sbh = fibh->ebh =
- udf_expand_dir_adinicb(dir, &block, err);
- if (!fibh->sbh)
- goto out_err;
- epos.block = dinfo->i_location;
- epos.offset = udf_file_entry_alloc_offset(dir);
- /* Load extent udf_expand_dir_adinicb() has created */
- udf_current_aext(dir, &epos, &eloc, &elen, 1);
+ blksize - udf_ext0_offset(dir) - iter->pos < nfidlen) {
+ udf_fiiter_release(iter);
+ ret = udf_expand_dir_adinicb(dir, &block);
+ if (ret)
+ return ret;
+ ret = udf_fiiter_init(iter, dir, dir->i_size);
+ if (ret < 0)
+ return ret;
}
- /* Entry fits into current block? */
- if (sb->s_blocksize - fibh->eoffset >= nfidlen) {
- fibh->soffset = fibh->eoffset;
- fibh->eoffset += nfidlen;
- if (fibh->sbh != fibh->ebh) {
- brelse(fibh->sbh);
- fibh->sbh = fibh->ebh;
- }
-
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
- block = dinfo->i_location.logicalBlockNum;
- fi = (struct fileIdentDesc *)
- (dinfo->i_ext.i_data +
- fibh->soffset -
- udf_ext0_offset(dir) +
- dinfo->i_lenEAttr);
- } else {
- block = eloc.logicalBlockNum +
- ((elen - 1) >>
- dir->i_sb->s_blocksize_bits);
- fi = (struct fileIdentDesc *)
- (fibh->sbh->b_data + fibh->soffset);
- }
+ /* Get blocknumber to use for entry tag */
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+ block = dinfo->i_location.logicalBlockNum;
} else {
- /* Round up last extent in the file */
- elen = (elen + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1);
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- epos.offset -= sizeof(struct short_ad);
- else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- epos.offset -= sizeof(struct long_ad);
- udf_write_aext(dir, &epos, &eloc, elen, 1);
- dinfo->i_lenExtents = (dinfo->i_lenExtents + sb->s_blocksize
- - 1) & ~(sb->s_blocksize - 1);
-
- fibh->soffset = fibh->eoffset - sb->s_blocksize;
- fibh->eoffset += nfidlen - sb->s_blocksize;
- if (fibh->sbh != fibh->ebh) {
- brelse(fibh->sbh);
- fibh->sbh = fibh->ebh;
- }
+ block = iter->eloc.logicalBlockNum +
+ ((iter->elen - 1) >> dir->i_blkbits);
+ }
+ off = iter->pos & (blksize - 1);
+ if (!off)
+ off = blksize;
+ /* Entry fits into current block? */
+ if (blksize - udf_ext0_offset(dir) - off >= nfidlen)
+ goto store_fi;
- block = eloc.logicalBlockNum + ((elen - 1) >>
- dir->i_sb->s_blocksize_bits);
- fibh->ebh = udf_bread(dir,
- f_pos >> dir->i_sb->s_blocksize_bits, 1, err);
- if (!fibh->ebh)
- goto out_err;
- /* Extents could have been merged, invalidate our position */
- brelse(epos.bh);
- epos.bh = NULL;
- epos.block = dinfo->i_location;
- epos.offset = udf_file_entry_alloc_offset(dir);
-
- if (!fibh->soffset) {
- /* Find the freshly allocated block */
- while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
- (EXT_RECORDED_ALLOCATED >> 30))
- ;
- block = eloc.logicalBlockNum + ((elen - 1) >>
- dir->i_sb->s_blocksize_bits);
- brelse(fibh->sbh);
- fibh->sbh = fibh->ebh;
- fi = (struct fileIdentDesc *)(fibh->sbh->b_data);
- } else {
- fi = (struct fileIdentDesc *)
- (fibh->sbh->b_data + sb->s_blocksize +
- fibh->soffset);
- }
+ ret = udf_fiiter_append_blk(iter);
+ if (ret) {
+ udf_fiiter_release(iter);
+ return ret;
}
- memset(cfi, 0, sizeof(struct fileIdentDesc));
- if (UDF_SB(sb)->s_udfrev >= 0x0200)
- udf_new_tag((char *)cfi, TAG_IDENT_FID, 3, 1, block,
+ /* Entry will be completely in the new block? Update tag location... */
+ if (!(iter->pos & (blksize - 1)))
+ block = iter->eloc.logicalBlockNum +
+ ((iter->elen - 1) >> dir->i_blkbits);
+store_fi:
+ memset(&iter->fi, 0, sizeof(struct fileIdentDesc));
+ if (UDF_SB(dir->i_sb)->s_udfrev >= 0x0200)
+ udf_new_tag((char *)(&iter->fi), TAG_IDENT_FID, 3, 1, block,
sizeof(struct tag));
else
- udf_new_tag((char *)cfi, TAG_IDENT_FID, 2, 1, block,
+ udf_new_tag((char *)(&iter->fi), TAG_IDENT_FID, 2, 1, block,
sizeof(struct tag));
- cfi->fileVersionNum = cpu_to_le16(1);
- cfi->lengthFileIdent = namelen;
- cfi->lengthOfImpUse = cpu_to_le16(0);
- if (!udf_write_fi(dir, cfi, fi, fibh, NULL, name)) {
- dir->i_size += nfidlen;
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- dinfo->i_lenAlloc += nfidlen;
- else {
- /* Find the last extent and truncate it to proper size */
- while (udf_next_aext(dir, &epos, &eloc, &elen, 1) ==
- (EXT_RECORDED_ALLOCATED >> 30))
- ;
- elen -= dinfo->i_lenExtents - dir->i_size;
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- epos.offset -= sizeof(struct short_ad);
- else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- epos.offset -= sizeof(struct long_ad);
- udf_write_aext(dir, &epos, &eloc, elen, 1);
- dinfo->i_lenExtents = dir->i_size;
- }
-
- mark_inode_dirty(dir);
- goto out_ok;
+ iter->fi.fileVersionNum = cpu_to_le16(1);
+ iter->fi.lengthFileIdent = namelen;
+ iter->fi.lengthOfImpUse = cpu_to_le16(0);
+ memcpy(iter->namebuf, name, namelen);
+ iter->name = iter->namebuf;
+
+ dir->i_size += nfidlen;
+ if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+ dinfo->i_lenAlloc += nfidlen;
} else {
- *err = -EIO;
- goto out_err;
+ /* Truncate last extent to proper size */
+ udf_fiiter_update_elen(iter, iter->elen -
+ (dinfo->i_lenExtents - dir->i_size));
}
+ mark_inode_dirty(dir);
-out_err:
- fi = NULL;
- if (fibh->sbh != fibh->ebh)
- brelse(fibh->ebh);
- brelse(fibh->sbh);
-out_ok:
- brelse(epos.bh);
- kfree(name);
- return fi;
+ return 0;
}
-static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
- struct udf_fileident_bh *fibh,
- struct fileIdentDesc *cfi)
+static void udf_fiiter_delete_entry(struct udf_fileident_iter *iter)
{
- cfi->fileCharacteristics |= FID_FILE_CHAR_DELETED;
+ iter->fi.fileCharacteristics |= FID_FILE_CHAR_DELETED;
- if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
- memset(&(cfi->icb), 0x00, sizeof(struct long_ad));
+ if (UDF_QUERY_FLAG(iter->dir->i_sb, UDF_FLAG_STRICT))
+ memset(&iter->fi.icb, 0x00, sizeof(struct long_ad));
- return udf_write_fi(inode, cfi, fi, fibh, NULL, NULL);
+ udf_fiiter_write_fi(iter, NULL);
}
-static int udf_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- bool excl)
+static void udf_add_fid_counter(struct super_block *sb, bool dir, int val)
{
- struct udf_fileident_bh fibh;
- struct inode *inode;
- struct fileIdentDesc cfi, *fi;
- int err;
- struct udf_inode_info *iinfo;
-
- inode = udf_new_inode(dir, mode, &err);
- if (!inode) {
- return err;
- }
+ struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
- iinfo = UDF_I(inode);
- if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- inode->i_data.a_ops = &udf_adinicb_aops;
+ if (!lvidiu)
+ return;
+ mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
+ if (dir)
+ le32_add_cpu(&lvidiu->numDirs, val);
else
- inode->i_data.a_ops = &udf_aops;
- inode->i_op = &udf_file_inode_operations;
- inode->i_fop = &udf_file_operations;
- mark_inode_dirty(inode);
+ le32_add_cpu(&lvidiu->numFiles, val);
+ udf_updated_lvid(sb);
+ mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);
+}
+
+static int udf_add_nondir(struct dentry *dentry, struct inode *inode)
+{
+ struct udf_inode_info *iinfo = UDF_I(inode);
+ struct inode *dir = d_inode(dentry->d_parent);
+ struct udf_fileident_iter iter;
+ int err;
- fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
- if (!fi) {
+ err = udf_fiiter_add_entry(dir, dentry, &iter);
+ if (err) {
inode_dec_link_count(inode);
- iput(inode);
+ discard_new_inode(inode);
return err;
}
- cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
- cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
- *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
+ iter.fi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
+ iter.fi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
+ *(__le32 *)((struct allocDescImpUse *)iter.fi.icb.impUse)->impUse =
cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
- udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
- if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- mark_inode_dirty(dir);
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
- d_instantiate(dentry, inode);
+ udf_fiiter_write_fi(&iter, NULL);
+ inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
+ mark_inode_dirty(dir);
+ udf_fiiter_release(&iter);
+ udf_add_fid_counter(dir->i_sb, false, 1);
+ d_instantiate_new(dentry, inode);
return 0;
}
-static int udf_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+static int udf_create(struct mnt_idmap *idmap, struct inode *dir,
+ struct dentry *dentry, umode_t mode, bool excl)
{
- struct inode *inode;
- struct udf_inode_info *iinfo;
- int err;
+ struct inode *inode = udf_new_inode(dir, mode);
- inode = udf_new_inode(dir, mode, &err);
- if (!inode)
- return err;
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
- iinfo = UDF_I(inode);
- if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- inode->i_data.a_ops = &udf_adinicb_aops;
- else
- inode->i_data.a_ops = &udf_aops;
+ inode->i_data.a_ops = &udf_aops;
inode->i_op = &udf_file_inode_operations;
inode->i_fop = &udf_file_operations;
mark_inode_dirty(inode);
- d_tmpfile(dentry, inode);
- return 0;
+ return udf_add_nondir(dentry, inode);
+}
+
+static int udf_tmpfile(struct mnt_idmap *idmap, struct inode *dir,
+ struct file *file, umode_t mode)
+{
+ struct inode *inode = udf_new_inode(dir, mode);
+
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ inode->i_data.a_ops = &udf_aops;
+ inode->i_op = &udf_file_inode_operations;
+ inode->i_fop = &udf_file_operations;
+ mark_inode_dirty(inode);
+ d_tmpfile(file, inode);
+ unlock_new_inode(inode);
+ return finish_open_simple(file, 0);
}
-static int udf_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
- dev_t rdev)
+static int udf_mknod(struct mnt_idmap *idmap, struct inode *dir,
+ struct dentry *dentry, umode_t mode, dev_t rdev)
{
struct inode *inode;
- struct udf_fileident_bh fibh;
- struct fileIdentDesc cfi, *fi;
- int err;
- struct udf_inode_info *iinfo;
if (!old_valid_dev(rdev))
return -EINVAL;
- err = -EIO;
- inode = udf_new_inode(dir, mode, &err);
- if (!inode)
- goto out;
+ inode = udf_new_inode(dir, mode);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
- iinfo = UDF_I(inode);
init_special_inode(inode, mode, rdev);
- fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
- if (!fi) {
- inode_dec_link_count(inode);
- iput(inode);
- return err;
- }
- cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
- cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
- *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
- cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
- udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
- if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- mark_inode_dirty(dir);
- mark_inode_dirty(inode);
-
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
- d_instantiate(dentry, inode);
- err = 0;
-
-out:
- return err;
+ return udf_add_nondir(dentry, inode);
}
-static int udf_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+static struct dentry *udf_mkdir(struct mnt_idmap *idmap, struct inode *dir,
+ struct dentry *dentry, umode_t mode)
{
struct inode *inode;
- struct udf_fileident_bh fibh;
- struct fileIdentDesc cfi, *fi;
+ struct udf_fileident_iter iter;
int err;
struct udf_inode_info *dinfo = UDF_I(dir);
struct udf_inode_info *iinfo;
- err = -EIO;
- inode = udf_new_inode(dir, S_IFDIR | mode, &err);
- if (!inode)
- goto out;
+ inode = udf_new_inode(dir, S_IFDIR | mode);
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
iinfo = UDF_I(inode);
inode->i_op = &udf_dir_inode_operations;
inode->i_fop = &udf_dir_operations;
- fi = udf_add_entry(inode, NULL, &fibh, &cfi, &err);
- if (!fi) {
- inode_dec_link_count(inode);
- iput(inode);
- goto out;
+ err = udf_fiiter_add_entry(inode, NULL, &iter);
+ if (err) {
+ clear_nlink(inode);
+ discard_new_inode(inode);
+ return ERR_PTR(err);
}
set_nlink(inode, 2);
- cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
- cfi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
- *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
+ iter.fi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
+ iter.fi.icb.extLocation = cpu_to_lelb(dinfo->i_location);
+ *(__le32 *)((struct allocDescImpUse *)iter.fi.icb.impUse)->impUse =
cpu_to_le32(dinfo->i_unique & 0x00000000FFFFFFFFUL);
- cfi.fileCharacteristics =
+ iter.fi.fileCharacteristics =
FID_FILE_CHAR_DIRECTORY | FID_FILE_CHAR_PARENT;
- udf_write_fi(inode, &cfi, fi, &fibh, NULL, NULL);
- brelse(fibh.sbh);
+ udf_fiiter_write_fi(&iter, NULL);
+ udf_fiiter_release(&iter);
mark_inode_dirty(inode);
- fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
- if (!fi) {
+ err = udf_fiiter_add_entry(dir, dentry, &iter);
+ if (err) {
clear_nlink(inode);
- mark_inode_dirty(inode);
- iput(inode);
- goto out;
+ discard_new_inode(inode);
+ return ERR_PTR(err);
}
- cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
- cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
- *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
+ iter.fi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
+ iter.fi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
+ *(__le32 *)((struct allocDescImpUse *)iter.fi.icb.impUse)->impUse =
cpu_to_le32(iinfo->i_unique & 0x00000000FFFFFFFFUL);
- cfi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
- udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
+ iter.fi.fileCharacteristics |= FID_FILE_CHAR_DIRECTORY;
+ udf_fiiter_write_fi(&iter, NULL);
+ udf_fiiter_release(&iter);
+ udf_add_fid_counter(dir->i_sb, true, 1);
inc_nlink(dir);
+ inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
mark_inode_dirty(dir);
- d_instantiate(dentry, inode);
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
- err = 0;
+ d_instantiate_new(dentry, inode);
-out:
- return err;
+ return NULL;
}
static int empty_dir(struct inode *dir)
{
- struct fileIdentDesc *fi, cfi;
- struct udf_fileident_bh fibh;
- loff_t f_pos;
- loff_t size = udf_ext0_offset(dir) + dir->i_size;
- int block;
- struct kernel_lb_addr eloc;
- uint32_t elen;
- sector_t offset;
- struct extent_position epos = {};
- struct udf_inode_info *dinfo = UDF_I(dir);
-
- f_pos = udf_ext0_offset(dir);
- fibh.soffset = fibh.eoffset = f_pos & (dir->i_sb->s_blocksize - 1);
-
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- fibh.sbh = fibh.ebh = NULL;
- else if (inode_bmap(dir, f_pos >> dir->i_sb->s_blocksize_bits,
- &epos, &eloc, &elen, &offset) ==
- (EXT_RECORDED_ALLOCATED >> 30)) {
- block = udf_get_lb_pblock(dir->i_sb, &eloc, offset);
- if ((++offset << dir->i_sb->s_blocksize_bits) < elen) {
- if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- epos.offset -= sizeof(struct short_ad);
- else if (dinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- epos.offset -= sizeof(struct long_ad);
- } else
- offset = 0;
-
- fibh.sbh = fibh.ebh = udf_tread(dir->i_sb, block);
- if (!fibh.sbh) {
- brelse(epos.bh);
- return 0;
- }
- } else {
- brelse(epos.bh);
- return 0;
- }
-
- while (f_pos < size) {
- fi = udf_fileident_read(dir, &f_pos, &fibh, &cfi, &epos, &eloc,
- &elen, &offset);
- if (!fi) {
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
- brelse(epos.bh);
- return 0;
- }
-
- if (cfi.lengthFileIdent &&
- (cfi.fileCharacteristics & FID_FILE_CHAR_DELETED) == 0) {
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
- brelse(epos.bh);
+ struct udf_fileident_iter iter;
+ int ret;
+
+ for (ret = udf_fiiter_init(&iter, dir, 0);
+ !ret && iter.pos < dir->i_size;
+ ret = udf_fiiter_advance(&iter)) {
+ if (iter.fi.lengthFileIdent &&
+ !(iter.fi.fileCharacteristics & FID_FILE_CHAR_DELETED)) {
+ udf_fiiter_release(&iter);
return 0;
}
}
-
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
- brelse(epos.bh);
+ udf_fiiter_release(&iter);
return 1;
}
static int udf_rmdir(struct inode *dir, struct dentry *dentry)
{
- int retval;
- struct inode *inode = dentry->d_inode;
- struct udf_fileident_bh fibh;
- struct fileIdentDesc *fi, cfi;
+ int ret;
+ struct inode *inode = d_inode(dentry);
+ struct udf_fileident_iter iter;
struct kernel_lb_addr tloc;
- retval = -ENOENT;
- fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
- if (!fi)
+ ret = udf_fiiter_find_entry(dir, &dentry->d_name, &iter);
+ if (ret)
goto out;
- retval = -EIO;
- tloc = lelb_to_cpu(cfi.icb.extLocation);
+ ret = -EFSCORRUPTED;
+ tloc = lelb_to_cpu(iter.fi.icb.extLocation);
if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
goto end_rmdir;
- retval = -ENOTEMPTY;
+ ret = -ENOTEMPTY;
if (!empty_dir(inode))
goto end_rmdir;
- retval = udf_delete_entry(dir, fi, &fibh, &cfi);
- if (retval)
- goto end_rmdir;
+ udf_fiiter_delete_entry(&iter);
if (inode->i_nlink != 2)
- udf_warn(inode->i_sb, "empty directory has nlink != 2 (%d)\n",
+ udf_warn(inode->i_sb, "empty directory has nlink != 2 (%u)\n",
inode->i_nlink);
clear_nlink(inode);
inode->i_size = 0;
- inode_dec_link_count(dir);
- inode->i_ctime = dir->i_ctime = dir->i_mtime =
- current_fs_time(dir->i_sb);
+ if (dir->i_nlink >= 3)
+ inode_dec_link_count(dir);
+ else
+ udf_warn(inode->i_sb, "parent dir link count too low (%u)\n",
+ dir->i_nlink);
+ udf_add_fid_counter(dir->i_sb, true, -1);
+ inode_set_mtime_to_ts(dir,
+ inode_set_ctime_to_ts(dir, inode_set_ctime_current(inode)));
mark_inode_dirty(dir);
-
+ ret = 0;
end_rmdir:
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
-
+ udf_fiiter_release(&iter);
out:
- return retval;
+ return ret;
}
static int udf_unlink(struct inode *dir, struct dentry *dentry)
{
- int retval;
- struct inode *inode = dentry->d_inode;
- struct udf_fileident_bh fibh;
- struct fileIdentDesc *fi;
- struct fileIdentDesc cfi;
+ int ret;
+ struct inode *inode = d_inode(dentry);
+ struct udf_fileident_iter iter;
struct kernel_lb_addr tloc;
- retval = -ENOENT;
- fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
- if (!fi)
+ ret = udf_fiiter_find_entry(dir, &dentry->d_name, &iter);
+ if (ret)
goto out;
- retval = -EIO;
- tloc = lelb_to_cpu(cfi.icb.extLocation);
+ ret = -EFSCORRUPTED;
+ tloc = lelb_to_cpu(iter.fi.icb.extLocation);
if (udf_get_lb_pblock(dir->i_sb, &tloc, 0) != inode->i_ino)
goto end_unlink;
if (!inode->i_nlink) {
- udf_debug("Deleting nonexistent file (%lu), %d\n",
+ udf_debug("Deleting nonexistent file (%lu), %u\n",
inode->i_ino, inode->i_nlink);
set_nlink(inode, 1);
}
- retval = udf_delete_entry(dir, fi, &fibh, &cfi);
- if (retval)
- goto end_unlink;
- dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
+ udf_fiiter_delete_entry(&iter);
+ inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
mark_inode_dirty(dir);
inode_dec_link_count(inode);
- inode->i_ctime = dir->i_ctime;
- retval = 0;
-
+ udf_add_fid_counter(dir->i_sb, false, -1);
+ inode_set_ctime_to_ts(inode, inode_get_ctime(dir));
+ ret = 0;
end_unlink:
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
-
+ udf_fiiter_release(&iter);
out:
- return retval;
+ return ret;
}
-static int udf_symlink(struct inode *dir, struct dentry *dentry,
- const char *symname)
+static int udf_symlink(struct mnt_idmap *idmap, struct inode *dir,
+ struct dentry *dentry, const char *symname)
{
struct inode *inode;
struct pathComponent *pc;
const char *compstart;
- struct udf_fileident_bh fibh;
struct extent_position epos = {};
int eoffset, elen = 0;
- struct fileIdentDesc *fi;
- struct fileIdentDesc cfi;
uint8_t *ea;
int err;
- int block;
+ udf_pblk_t block;
unsigned char *name = NULL;
int namelen;
struct udf_inode_info *iinfo;
struct super_block *sb = dir->i_sb;
- inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err);
- if (!inode)
- goto out;
-
- iinfo = UDF_I(inode);
- down_write(&iinfo->i_data_sem);
- name = kmalloc(UDF_NAME_LEN, GFP_NOFS);
+ name = kmalloc(UDF_NAME_LEN_CS0, GFP_KERNEL);
if (!name) {
err = -ENOMEM;
- goto out_no_entry;
+ goto out;
+ }
+
+ inode = udf_new_inode(dir, S_IFLNK | 0777);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto out;
}
+ iinfo = UDF_I(inode);
+ down_write(&iinfo->i_data_sem);
inode->i_data.a_ops = &udf_symlink_aops;
inode->i_op = &udf_symlink_inode_operations;
+ inode_nohighmem(inode);
if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
struct kernel_lb_addr eloc;
@@ -924,13 +618,22 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
iinfo->i_location.partitionReferenceNum;
bsize = sb->s_blocksize;
iinfo->i_lenExtents = bsize;
- udf_add_aext(inode, &epos, &eloc, bsize, 0);
+ err = udf_add_aext(inode, &epos, &eloc, bsize, 0);
brelse(epos.bh);
+ if (err < 0) {
+ udf_free_blocks(sb, inode, &eloc, 0, 1);
+ goto out_no_entry;
+ }
block = udf_get_pblock(sb, block,
iinfo->i_location.partitionReferenceNum,
0);
- epos.bh = udf_tgetblk(sb, block);
+ epos.bh = sb_getblk(sb, block);
+ if (unlikely(!epos.bh)) {
+ err = -ENOMEM;
+ udf_free_blocks(sb, inode, &eloc, 0, 1);
+ goto out_no_entry;
+ }
lock_buffer(epos.bh);
memset(epos.bh->b_data, 0x00, bsize);
set_buffer_uptodate(epos.bh);
@@ -938,7 +641,7 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
mark_buffer_dirty_inode(epos.bh, inode);
ea = epos.bh->b_data + udf_ext0_offset(inode);
} else
- ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
+ ea = iinfo->i_data + iinfo->i_lenEAttr;
eoffset = sb->s_blocksize - udf_ext0_offset(inode);
pc = (struct pathComponent *)ea;
@@ -980,8 +683,9 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
}
if (pc->componentType == 5) {
- namelen = udf_put_filename(sb, compstart, name,
- symname - compstart);
+ namelen = udf_put_filename(sb, compstart,
+ symname - compstart,
+ name, UDF_NAME_LEN_CS0);
if (!namelen)
goto out_no_entry;
@@ -1010,26 +714,9 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
else
udf_truncate_tail_extent(inode);
mark_inode_dirty(inode);
-
- fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
- if (!fi)
- goto out_no_entry;
- cfi.icb.extLength = cpu_to_le32(sb->s_blocksize);
- cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
- if (UDF_SB(inode->i_sb)->s_lvid_bh) {
- *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
- cpu_to_le32(lvid_get_unique_id(sb));
- }
- udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
- if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- mark_inode_dirty(dir);
up_write(&iinfo->i_data_sem);
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
- d_instantiate(dentry, inode);
- err = 0;
+ err = udf_add_nondir(dentry, inode);
out:
kfree(name);
return err;
@@ -1037,38 +724,35 @@ out:
out_no_entry:
up_write(&iinfo->i_data_sem);
inode_dec_link_count(inode);
- iput(inode);
+ discard_new_inode(inode);
goto out;
}
static int udf_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *dentry)
{
- struct inode *inode = old_dentry->d_inode;
- struct udf_fileident_bh fibh;
- struct fileIdentDesc cfi, *fi;
+ struct inode *inode = d_inode(old_dentry);
+ struct udf_fileident_iter iter;
int err;
- fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
- if (!fi) {
+ err = udf_fiiter_add_entry(dir, dentry, &iter);
+ if (err)
return err;
- }
- cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
- cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
+ iter.fi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
+ iter.fi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
if (UDF_SB(inode->i_sb)->s_lvid_bh) {
- *(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
+ *(__le32 *)((struct allocDescImpUse *)iter.fi.icb.impUse)->impUse =
cpu_to_le32(lvid_get_unique_id(inode->i_sb));
}
- udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
- if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- mark_inode_dirty(dir);
+ udf_fiiter_write_fi(&iter, NULL);
+ udf_fiiter_release(&iter);
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
inc_nlink(inode);
- inode->i_ctime = current_fs_time(inode->i_sb);
+ udf_add_fid_counter(dir->i_sb, false, 1);
+ inode_set_ctime_current(inode);
mark_inode_dirty(inode);
+ inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
+ mark_inode_dirty(dir);
ihold(inode);
d_instantiate(dentry, inode);
@@ -1078,112 +762,139 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir,
/* Anybody can rename anything with this: the permission checks are left to the
* higher-level routines.
*/
-static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry)
+static int udf_rename(struct mnt_idmap *idmap, struct inode *old_dir,
+ struct dentry *old_dentry, struct inode *new_dir,
+ struct dentry *new_dentry, unsigned int flags)
{
- struct inode *old_inode = old_dentry->d_inode;
- struct inode *new_inode = new_dentry->d_inode;
- struct udf_fileident_bh ofibh, nfibh;
- struct fileIdentDesc *ofi = NULL, *nfi = NULL, *dir_fi = NULL;
- struct fileIdentDesc ocfi, ncfi;
- struct buffer_head *dir_bh = NULL;
- int retval = -ENOENT;
+ struct inode *old_inode = d_inode(old_dentry);
+ struct inode *new_inode = d_inode(new_dentry);
+ struct udf_fileident_iter oiter, niter, diriter;
+ bool has_diriter = false, is_dir = false;
+ int retval;
struct kernel_lb_addr tloc;
- struct udf_inode_info *old_iinfo = UDF_I(old_inode);
- ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
- if (ofi) {
- if (ofibh.sbh != ofibh.ebh)
- brelse(ofibh.ebh);
- brelse(ofibh.sbh);
- }
- tloc = lelb_to_cpu(ocfi.icb.extLocation);
- if (!ofi || udf_get_lb_pblock(old_dir->i_sb, &tloc, 0)
- != old_inode->i_ino)
- goto end_rename;
-
- nfi = udf_find_entry(new_dir, &new_dentry->d_name, &nfibh, &ncfi);
- if (nfi) {
- if (!new_inode) {
- if (nfibh.sbh != nfibh.ebh)
- brelse(nfibh.ebh);
- brelse(nfibh.sbh);
- nfi = NULL;
- }
+ if (flags & ~RENAME_NOREPLACE)
+ return -EINVAL;
+
+ retval = udf_fiiter_find_entry(old_dir, &old_dentry->d_name, &oiter);
+ if (retval)
+ return retval;
+
+ tloc = lelb_to_cpu(oiter.fi.icb.extLocation);
+ if (udf_get_lb_pblock(old_dir->i_sb, &tloc, 0) != old_inode->i_ino) {
+ retval = -ENOENT;
+ goto out_oiter;
}
- if (S_ISDIR(old_inode->i_mode)) {
- int offset = udf_ext0_offset(old_inode);
+ if (S_ISDIR(old_inode->i_mode)) {
if (new_inode) {
retval = -ENOTEMPTY;
if (!empty_dir(new_inode))
- goto end_rename;
+ goto out_oiter;
+ retval = -EFSCORRUPTED;
+ if (new_inode->i_nlink != 2)
+ goto out_oiter;
}
- retval = -EIO;
- if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
- dir_fi = udf_get_fileident(
- old_iinfo->i_ext.i_data -
- (old_iinfo->i_efe ?
- sizeof(struct extendedFileEntry) :
- sizeof(struct fileEntry)),
- old_inode->i_sb->s_blocksize, &offset);
- } else {
- dir_bh = udf_bread(old_inode, 0, 0, &retval);
- if (!dir_bh)
- goto end_rename;
- dir_fi = udf_get_fileident(dir_bh->b_data,
- old_inode->i_sb->s_blocksize, &offset);
+ retval = -EFSCORRUPTED;
+ if (old_dir->i_nlink < 3)
+ goto out_oiter;
+ is_dir = true;
+ } else if (new_inode) {
+ retval = -EFSCORRUPTED;
+ if (new_inode->i_nlink < 1)
+ goto out_oiter;
+ }
+ if (is_dir && old_dir != new_dir) {
+ retval = udf_fiiter_find_entry(old_inode, &dotdot_name,
+ &diriter);
+ if (retval == -ENOENT) {
+ udf_err(old_inode->i_sb,
+ "directory (ino %lu) has no '..' entry\n",
+ old_inode->i_ino);
+ retval = -EFSCORRUPTED;
}
- if (!dir_fi)
- goto end_rename;
- tloc = lelb_to_cpu(dir_fi->icb.extLocation);
+ if (retval)
+ goto out_oiter;
+ has_diriter = true;
+ tloc = lelb_to_cpu(diriter.fi.icb.extLocation);
if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
- old_dir->i_ino)
- goto end_rename;
+ old_dir->i_ino) {
+ retval = -EFSCORRUPTED;
+ udf_err(old_inode->i_sb,
+ "directory (ino %lu) has parent entry pointing to another inode (%lu != %u)\n",
+ old_inode->i_ino, old_dir->i_ino,
+ udf_get_lb_pblock(old_inode->i_sb, &tloc, 0));
+ goto out_oiter;
+ }
+ }
+
+ retval = udf_fiiter_find_entry(new_dir, &new_dentry->d_name, &niter);
+ if (retval && retval != -ENOENT)
+ goto out_oiter;
+ /* Entry found but not passed by VFS? */
+ if (!retval && !new_inode) {
+ retval = -EFSCORRUPTED;
+ udf_fiiter_release(&niter);
+ goto out_oiter;
}
- if (!nfi) {
- nfi = udf_add_entry(new_dir, new_dentry, &nfibh, &ncfi,
- &retval);
- if (!nfi)
- goto end_rename;
+ /* Entry not found? Need to add one... */
+ if (retval) {
+ udf_fiiter_release(&niter);
+ retval = udf_fiiter_add_entry(new_dir, new_dentry, &niter);
+ if (retval)
+ goto out_oiter;
}
/*
* Like most other Unix systems, set the ctime for inodes on a
* rename.
*/
- old_inode->i_ctime = current_fs_time(old_inode->i_sb);
+ inode_set_ctime_current(old_inode);
mark_inode_dirty(old_inode);
/*
* ok, that's it
*/
- ncfi.fileVersionNum = ocfi.fileVersionNum;
- ncfi.fileCharacteristics = ocfi.fileCharacteristics;
- memcpy(&(ncfi.icb), &(ocfi.icb), sizeof(struct long_ad));
- udf_write_fi(new_dir, &ncfi, nfi, &nfibh, NULL, NULL);
+ niter.fi.fileVersionNum = oiter.fi.fileVersionNum;
+ niter.fi.fileCharacteristics = oiter.fi.fileCharacteristics;
+ memcpy(&(niter.fi.icb), &(oiter.fi.icb), sizeof(oiter.fi.icb));
+ udf_fiiter_write_fi(&niter, NULL);
+ udf_fiiter_release(&niter);
- /* The old fid may have moved - find it again */
- ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
- udf_delete_entry(old_dir, ofi, &ofibh, &ocfi);
+ /*
+ * The old entry may have moved due to new entry allocation. Find it
+ * again.
+ */
+ udf_fiiter_release(&oiter);
+ retval = udf_fiiter_find_entry(old_dir, &old_dentry->d_name, &oiter);
+ if (retval) {
+ udf_err(old_dir->i_sb,
+ "failed to find renamed entry again in directory (ino %lu)\n",
+ old_dir->i_ino);
+ } else {
+ udf_fiiter_delete_entry(&oiter);
+ udf_fiiter_release(&oiter);
+ }
if (new_inode) {
- new_inode->i_ctime = current_fs_time(new_inode->i_sb);
+ inode_set_ctime_current(new_inode);
inode_dec_link_count(new_inode);
+ udf_add_fid_counter(old_dir->i_sb, S_ISDIR(new_inode->i_mode),
+ -1);
}
- old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
+ inode_set_mtime_to_ts(old_dir, inode_set_ctime_current(old_dir));
+ inode_set_mtime_to_ts(new_dir, inode_set_ctime_current(new_dir));
mark_inode_dirty(old_dir);
+ mark_inode_dirty(new_dir);
- if (dir_fi) {
- dir_fi->icb.extLocation = cpu_to_lelb(UDF_I(new_dir)->i_location);
- udf_update_tag((char *)dir_fi,
- (sizeof(struct fileIdentDesc) +
- le16_to_cpu(dir_fi->lengthOfImpUse) + 3) & ~3);
- if (old_iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
- mark_inode_dirty(old_inode);
- else
- mark_buffer_dirty_inode(dir_bh, old_inode);
+ if (has_diriter) {
+ diriter.fi.icb.extLocation =
+ cpu_to_lelb(UDF_I(new_dir)->i_location);
+ udf_fiiter_write_fi(&diriter, NULL);
+ udf_fiiter_release(&diriter);
+ }
+ if (is_dir) {
inode_dec_link_count(old_dir);
if (new_inode)
inode_dec_link_count(new_inode);
@@ -1192,22 +903,11 @@ static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
mark_inode_dirty(new_dir);
}
}
-
- if (ofi) {
- if (ofibh.sbh != ofibh.ebh)
- brelse(ofibh.ebh);
- brelse(ofibh.sbh);
- }
-
- retval = 0;
-
-end_rename:
- brelse(dir_bh);
- if (nfi) {
- if (nfibh.sbh != nfibh.ebh)
- brelse(nfibh.ebh);
- brelse(nfibh.sbh);
- }
+ return 0;
+out_oiter:
+ if (has_diriter)
+ udf_fiiter_release(&diriter);
+ udf_fiiter_release(&oiter);
return retval;
}
@@ -1215,26 +915,16 @@ end_rename:
static struct dentry *udf_get_parent(struct dentry *child)
{
struct kernel_lb_addr tloc;
- struct inode *inode = NULL;
- struct qstr dotdot = QSTR_INIT("..", 2);
- struct fileIdentDesc cfi;
- struct udf_fileident_bh fibh;
-
- if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi))
- goto out_unlock;
-
- if (fibh.sbh != fibh.ebh)
- brelse(fibh.ebh);
- brelse(fibh.sbh);
+ struct udf_fileident_iter iter;
+ int err;
- tloc = lelb_to_cpu(cfi.icb.extLocation);
- inode = udf_iget(child->d_inode->i_sb, &tloc);
- if (!inode)
- goto out_unlock;
+ err = udf_fiiter_find_entry(d_inode(child), &dotdot_name, &iter);
+ if (err)
+ return ERR_PTR(err);
- return d_obtain_alias(inode);
-out_unlock:
- return ERR_PTR(-EACCES);
+ tloc = lelb_to_cpu(iter.fi.icb.extLocation);
+ udf_fiiter_release(&iter);
+ return d_obtain_alias(udf_iget(child->d_sb, &tloc));
}
@@ -1251,8 +941,8 @@ static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
loc.partitionReferenceNum = partref;
inode = udf_iget(sb, &loc);
- if (inode == NULL)
- return ERR_PTR(-ENOMEM);
+ if (IS_ERR(inode))
+ return ERR_CAST(inode);
if (generation && inode->i_generation != generation) {
iput(inode);
@@ -1264,7 +954,7 @@ static struct dentry *udf_nfs_get_inode(struct super_block *sb, u32 block,
static struct dentry *udf_fh_to_dentry(struct super_block *sb,
struct fid *fid, int fh_len, int fh_type)
{
- if ((fh_len != 3 && fh_len != 5) ||
+ if (fh_len < 3 ||
(fh_type != FILEID_UDF_WITH_PARENT &&
fh_type != FILEID_UDF_WITHOUT_PARENT))
return NULL;
@@ -1276,7 +966,7 @@ static struct dentry *udf_fh_to_dentry(struct super_block *sb,
static struct dentry *udf_fh_to_parent(struct super_block *sb,
struct fid *fid, int fh_len, int fh_type)
{
- if (fh_len != 5 || fh_type != FILEID_UDF_WITH_PARENT)
+ if (fh_len < 5 || fh_type != FILEID_UDF_WITH_PARENT)
return NULL;
return udf_nfs_get_inode(sb, fid->udf.parent_block,
@@ -1336,8 +1026,3 @@ const struct inode_operations udf_dir_inode_operations = {
.rename = udf_rename,
.tmpfile = udf_tmpfile,
};
-const struct inode_operations udf_symlink_inode_operations = {
- .readlink = generic_readlink,
- .follow_link = page_follow_link_light,
- .put_link = page_put_link,
-};
diff --git a/fs/udf/osta_udf.h b/fs/udf/osta_udf.h
index fbff74654df2..157de0ec0cd5 100644
--- a/fs/udf/osta_udf.h
+++ b/fs/udf/osta_udf.h
@@ -1,10 +1,11 @@
/*
* osta_udf.h
*
- * This file is based on OSTA UDF(tm) 2.50 (April 30, 2003)
+ * This file is based on OSTA UDF(tm) 2.60 (March 1, 2005)
* http://www.osta.org
*
- * Copyright (c) 2001-2004 Ben Fennema <bfennema@falcon.csc.calpoly.edu>
+ * Copyright (c) 2001-2004 Ben Fennema
+ * Copyright (c) 2017-2019 Pali Rohár <pali@kernel.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -32,58 +33,77 @@
* SUCH DAMAGE.
*/
+/**
+ * @file
+ * OSTA-UDF defines and structure definitions
+ */
+
#include "ecma_167.h"
#ifndef _OSTA_UDF_H
#define _OSTA_UDF_H 1
-/* OSTA CS0 Charspec (UDF 2.50 2.1.2) */
+/* OSTA CS0 Charspec (UDF 2.60 2.1.2) */
#define UDF_CHAR_SET_TYPE 0
#define UDF_CHAR_SET_INFO "OSTA Compressed Unicode"
-/* Entity Identifier (UDF 2.50 2.1.5) */
-/* Identifiers (UDF 2.50 2.1.5.2) */
+/* Entity Identifier (UDF 2.60 2.1.5) */
+/* Identifiers (UDF 2.60 2.1.5.2) */
+/* Implementation Use Extended Attribute (UDF 2.60 3.3.4.5) */
+/* Virtual Allocation Table (UDF 1.50 2.2.10) */
+/* Logical Volume Extended Information (UDF 1.50 Errata, DCN 5003, 3.3.4.5.1.3) */
+/* OS2EA (UDF 1.50 3.3.4.5.3.1) */
+/* MacUniqueIDTable (UDF 1.50 3.3.4.5.4.3) */
+/* MacResourceFork (UDF 1.50 3.3.4.5.4.4) */
#define UDF_ID_DEVELOPER "*Linux UDFFS"
#define UDF_ID_COMPLIANT "*OSTA UDF Compliant"
#define UDF_ID_LV_INFO "*UDF LV Info"
#define UDF_ID_FREE_EA "*UDF FreeEASpace"
#define UDF_ID_FREE_APP_EA "*UDF FreeAppEASpace"
#define UDF_ID_DVD_CGMS "*UDF DVD CGMS Info"
+#define UDF_ID_VAT_LVEXTENSION "*UDF VAT LVExtension"
#define UDF_ID_OS2_EA "*UDF OS/2 EA"
#define UDF_ID_OS2_EA_LENGTH "*UDF OS/2 EALength"
#define UDF_ID_MAC_VOLUME "*UDF Mac VolumeInfo"
#define UDF_ID_MAC_FINDER "*UDF Mac FinderInfo"
#define UDF_ID_MAC_UNIQUE "*UDF Mac UniqueIDTable"
#define UDF_ID_MAC_RESOURCE "*UDF Mac ResourceFork"
+#define UDF_ID_OS400_DIRINFO "*UDF OS/400 DirInfo"
#define UDF_ID_VIRTUAL "*UDF Virtual Partition"
#define UDF_ID_SPARABLE "*UDF Sparable Partition"
#define UDF_ID_ALLOC "*UDF Virtual Alloc Tbl"
#define UDF_ID_SPARING "*UDF Sparing Table"
#define UDF_ID_METADATA "*UDF Metadata Partition"
-/* Identifier Suffix (UDF 2.50 2.1.5.3) */
-#define IS_DF_HARD_WRITE_PROTECT 0x01
-#define IS_DF_SOFT_WRITE_PROTECT 0x02
+/* Identifier Suffix (UDF 2.60 2.1.5.3) */
+#define DOMAIN_FLAGS_HARD_WRITE_PROTECT 0x01
+#define DOMAIN_FLAGS_SOFT_WRITE_PROTECT 0x02
+
+struct domainIdentSuffix {
+ __le16 UDFRevision;
+ uint8_t domainFlags;
+ uint8_t reserved[5];
+} __packed;
struct UDFIdentSuffix {
__le16 UDFRevision;
uint8_t OSClass;
uint8_t OSIdentifier;
uint8_t reserved[4];
-} __attribute__ ((packed));
+} __packed;
struct impIdentSuffix {
uint8_t OSClass;
uint8_t OSIdentifier;
- uint8_t reserved[6];
-} __attribute__ ((packed));
+ uint8_t impUse[6];
+} __packed;
struct appIdentSuffix {
uint8_t impUse[8];
-} __attribute__ ((packed));
+} __packed;
-/* Logical Volume Integrity Descriptor (UDF 2.50 2.2.6) */
-/* Implementation Use (UDF 2.50 2.2.6.4) */
+/* Logical Volume Integrity Descriptor (UDF 2.60 2.2.6) */
+/* Implementation Use (UDF 2.60 2.2.6.4) */
struct logicalVolIntegrityDescImpUse {
struct regid impIdent;
__le32 numFiles;
@@ -91,11 +111,11 @@ struct logicalVolIntegrityDescImpUse {
__le16 minUDFReadRev;
__le16 minUDFWriteRev;
__le16 maxUDFWriteRev;
- uint8_t impUse[0];
-} __attribute__ ((packed));
+ uint8_t impUse[];
+} __packed;
-/* Implementation Use Volume Descriptor (UDF 2.50 2.2.7) */
-/* Implementation Use (UDF 2.50 2.2.7.2) */
+/* Implementation Use Volume Descriptor (UDF 2.60 2.2.7) */
+/* Implementation Use (UDF 2.60 2.2.7.2) */
struct impUseVolDescImpUse {
struct charspec LVICharset;
dstring logicalVolIdent[128];
@@ -104,7 +124,7 @@ struct impUseVolDescImpUse {
dstring LVInfo3[36];
struct regid impIdent;
uint8_t impUse[128];
-} __attribute__ ((packed));
+} __packed;
struct udfPartitionMap2 {
uint8_t partitionMapType;
@@ -113,9 +133,9 @@ struct udfPartitionMap2 {
struct regid partIdent;
__le16 volSeqNum;
__le16 partitionNum;
-} __attribute__ ((packed));
+} __packed;
-/* Virtual Partition Map (UDF 2.50 2.2.8) */
+/* Virtual Partition Map (UDF 2.60 2.2.8) */
struct virtualPartitionMap {
uint8_t partitionMapType;
uint8_t partitionMapLength;
@@ -124,9 +144,9 @@ struct virtualPartitionMap {
__le16 volSeqNum;
__le16 partitionNum;
uint8_t reserved2[24];
-} __attribute__ ((packed));
+} __packed;
-/* Sparable Partition Map (UDF 2.50 2.2.9) */
+/* Sparable Partition Map (UDF 2.60 2.2.9) */
struct sparablePartitionMap {
uint8_t partitionMapType;
uint8_t partitionMapLength;
@@ -139,9 +159,9 @@ struct sparablePartitionMap {
uint8_t reserved2[1];
__le32 sizeSparingTable;
__le32 locSparingTable[4];
-} __attribute__ ((packed));
+} __packed;
-/* Metadata Partition Map (UDF 2.4.0 2.2.10) */
+/* Metadata Partition Map (UDF 2.60 2.2.10) */
struct metadataPartitionMap {
uint8_t partitionMapType;
uint8_t partitionMapLength;
@@ -156,18 +176,9 @@ struct metadataPartitionMap {
__le16 alignUnitSize;
uint8_t flags;
uint8_t reserved2[5];
-} __attribute__ ((packed));
+} __packed;
-/* Virtual Allocation Table (UDF 1.5 2.2.10) */
-struct virtualAllocationTable15 {
- __le32 VirtualSector[0];
- struct regid vatIdent;
- __le32 previousVATICBLoc;
-} __attribute__ ((packed));
-
-#define ICBTAG_FILE_TYPE_VAT15 0x00U
-
-/* Virtual Allocation Table (UDF 2.50 2.2.11) */
+/* Virtual Allocation Table (UDF 2.60 2.2.11) */
struct virtualAllocationTable20 {
__le16 lengthHeader;
__le16 lengthImpUse;
@@ -175,21 +186,21 @@ struct virtualAllocationTable20 {
__le32 previousVATICBLoc;
__le32 numFiles;
__le32 numDirs;
- __le16 minReadRevision;
- __le16 minWriteRevision;
- __le16 maxWriteRevision;
+ __le16 minUDFReadRev;
+ __le16 minUDFWriteRev;
+ __le16 maxUDFWriteRev;
__le16 reserved;
- uint8_t impUse[0];
- __le32 vatEntry[0];
-} __attribute__ ((packed));
+ uint8_t impUse[];
+ /* __le32 vatEntry[]; */
+} __packed;
#define ICBTAG_FILE_TYPE_VAT20 0xF8U
-/* Sparing Table (UDF 2.50 2.2.12) */
+/* Sparing Table (UDF 2.60 2.2.12) */
struct sparingEntry {
__le32 origLocation;
__le32 mappedLocation;
-} __attribute__ ((packed));
+} __packed;
struct sparingTable {
struct tag descTag;
@@ -197,55 +208,69 @@ struct sparingTable {
__le16 reallocationTableLen;
__le16 reserved;
__le32 sequenceNum;
- struct sparingEntry
- mapEntry[0];
-} __attribute__ ((packed));
+ struct sparingEntry mapEntry[];
+} __packed;
-/* Metadata File (and Metadata Mirror File) (UDF 2.50 2.2.13.1) */
+/* Metadata File (and Metadata Mirror File) (UDF 2.60 2.2.13.1) */
#define ICBTAG_FILE_TYPE_MAIN 0xFA
#define ICBTAG_FILE_TYPE_MIRROR 0xFB
#define ICBTAG_FILE_TYPE_BITMAP 0xFC
-/* struct struct long_ad ICB - ADImpUse (UDF 2.50 2.2.4.3) */
+/* struct long_ad ICB - ADImpUse (UDF 2.60 2.2.4.3) */
struct allocDescImpUse {
__le16 flags;
uint8_t impUse[4];
-} __attribute__ ((packed));
+} __packed;
#define AD_IU_EXT_ERASED 0x0001
-/* Real-Time Files (UDF 2.50 6.11) */
+/* Real-Time Files (UDF 2.60 6.11) */
#define ICBTAG_FILE_TYPE_REALTIME 0xF9U
-/* Implementation Use Extended Attribute (UDF 2.50 3.3.4.5) */
-/* FreeEASpace (UDF 2.50 3.3.4.5.1.1) */
+/* Implementation Use Extended Attribute (UDF 2.60 3.3.4.5) */
+/* FreeEASpace (UDF 2.60 3.3.4.5.1.1) */
struct freeEaSpace {
__le16 headerChecksum;
- uint8_t freeEASpace[0];
-} __attribute__ ((packed));
+ uint8_t freeEASpace[];
+} __packed;
-/* DVD Copyright Management Information (UDF 2.50 3.3.4.5.1.2) */
+/* DVD Copyright Management Information (UDF 2.60 3.3.4.5.1.2) */
struct DVDCopyrightImpUse {
__le16 headerChecksum;
uint8_t CGMSInfo;
uint8_t dataType;
uint8_t protectionSystemInfo[4];
-} __attribute__ ((packed));
+} __packed;
+
+/* Logical Volume Extended Information (UDF 1.50 Errata, DCN 5003, 3.3.4.5.1.3) */
+struct LVExtensionEA {
+ __le16 headerChecksum;
+ __le64 verificationID;
+ __le32 numFiles;
+ __le32 numDirs;
+ dstring logicalVolIdent[128];
+} __packed;
-/* Application Use Extended Attribute (UDF 2.50 3.3.4.6) */
-/* FreeAppEASpace (UDF 2.50 3.3.4.6.1) */
+/* Application Use Extended Attribute (UDF 2.60 3.3.4.6) */
+/* FreeAppEASpace (UDF 2.60 3.3.4.6.1) */
struct freeAppEASpace {
__le16 headerChecksum;
- uint8_t freeEASpace[0];
-} __attribute__ ((packed));
+ uint8_t freeEASpace[];
+} __packed;
-/* UDF Defined System Stream (UDF 2.50 3.3.7) */
+/* UDF Defined System Stream (UDF 2.60 3.3.7) */
#define UDF_ID_UNIQUE_ID "*UDF Unique ID Mapping Data"
#define UDF_ID_NON_ALLOC "*UDF Non-Allocatable Space"
#define UDF_ID_POWER_CAL "*UDF Power Cal Table"
#define UDF_ID_BACKUP "*UDF Backup"
-/* Operating System Identifiers (UDF 2.50 6.3) */
+/* UDF Defined Non-System Streams (UDF 2.60 3.3.8) */
+#define UDF_ID_MAC_RESOURCE_FORK_STREAM "*UDF Macintosh Resource Fork"
+/* #define UDF_ID_OS2_EA "*UDF OS/2 EA" */
+#define UDF_ID_NT_ACL "*UDF NT ACL"
+#define UDF_ID_UNIX_ACL "*UDF UNIX ACL"
+
+/* Operating System Identifiers (UDF 2.60 6.3) */
#define UDF_OS_CLASS_UNDEF 0x00U
#define UDF_OS_CLASS_DOS 0x01U
#define UDF_OS_CLASS_OS2 0x02U
@@ -270,6 +295,7 @@ struct freeAppEASpace {
#define UDF_OS_ID_LINUX 0x05U
#define UDF_OS_ID_MKLINUX 0x06U
#define UDF_OS_ID_FREEBSD 0x07U
+#define UDF_OS_ID_NETBSD 0x08U
#define UDF_OS_ID_WIN9X 0x00U
#define UDF_OS_ID_WINNT 0x00U
#define UDF_OS_ID_OS400 0x00U
diff --git a/fs/udf/partition.c b/fs/udf/partition.c
index d6caf01a2097..2b85c9501bed 100644
--- a/fs/udf/partition.c
+++ b/fs/udf/partition.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* partition.c
*
@@ -5,11 +6,6 @@
* Partition handling routines for the OSTA-UDF(tm) filesystem.
*
* COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
- *
* (C) 1998-2001 Ben Fennema
*
* HISTORY
@@ -24,7 +20,6 @@
#include <linux/fs.h>
#include <linux/string.h>
-#include <linux/buffer_head.h>
#include <linux/mutex.h>
uint32_t udf_get_pblock(struct super_block *sb, uint32_t block,
@@ -33,7 +28,7 @@ uint32_t udf_get_pblock(struct super_block *sb, uint32_t block,
struct udf_sb_info *sbi = UDF_SB(sb);
struct udf_part_map *map;
if (partition >= sbi->s_partitions) {
- udf_debug("block=%d, partition=%d, offset=%d: invalid partition\n",
+ udf_debug("block=%u, partition=%u, offset=%u: invalid partition\n",
block, partition, offset);
return 0xFFFFFFFF;
}
@@ -55,18 +50,19 @@ uint32_t udf_get_pblock_virt15(struct super_block *sb, uint32_t block,
struct udf_part_map *map;
struct udf_virtual_data *vdata;
struct udf_inode_info *iinfo = UDF_I(sbi->s_vat_inode);
+ int err;
map = &sbi->s_partmaps[partition];
vdata = &map->s_type_specific.s_virtual;
if (block > vdata->s_num_entries) {
- udf_debug("Trying to access block beyond end of VAT (%d max %d)\n",
+ udf_debug("Trying to access block beyond end of VAT (%u max %u)\n",
block, vdata->s_num_entries);
return 0xFFFFFFFF;
}
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
- loc = le32_to_cpu(((__le32 *)(iinfo->i_ext.i_data +
+ loc = le32_to_cpu(((__le32 *)(iinfo->i_data +
vdata->s_start_offset))[block]);
goto translate;
}
@@ -80,12 +76,10 @@ uint32_t udf_get_pblock_virt15(struct super_block *sb, uint32_t block,
index = vdata->s_start_offset / sizeof(uint32_t) + block;
}
- loc = udf_block_map(sbi->s_vat_inode, newblock);
-
- bh = sb_bread(sb, loc);
+ bh = udf_bread(sbi->s_vat_inode, newblock, 0, &err);
if (!bh) {
- udf_debug("get_pblock(UDF_VIRTUAL_MAP:%p,%d,%d) VAT: %d[%d]\n",
- sb, block, partition, loc, index);
+ udf_debug("get_pblock(UDF_VIRTUAL_MAP:%p,%u,%u)\n",
+ sb, block, partition);
return 0xFFFFFFFF;
}
@@ -288,15 +282,18 @@ static uint32_t udf_try_read_meta(struct inode *inode, uint32_t block,
sector_t ext_offset;
struct extent_position epos = {};
uint32_t phyblock;
+ int8_t etype;
+ int err = 0;
- if (inode_bmap(inode, block, &epos, &eloc, &elen, &ext_offset) !=
- (EXT_RECORDED_ALLOCATED >> 30))
+ err = inode_bmap(inode, block, &epos, &eloc, &elen, &ext_offset, &etype);
+ if (err <= 0 || etype != (EXT_RECORDED_ALLOCATED >> 30))
phyblock = 0xFFFFFFFF;
else {
map = &UDF_SB(sb)->s_partmaps[partition];
/* map to sparable/physical partition desc */
phyblock = udf_get_pblock(sb, eloc.logicalBlockNum,
- map->s_partition_num, ext_offset + offset);
+ map->s_type_specific.s_metadata.s_phys_partition_ref,
+ ext_offset + offset);
}
brelse(epos.bh);
@@ -318,14 +315,18 @@ uint32_t udf_get_pblock_meta25(struct super_block *sb, uint32_t block,
mdata = &map->s_type_specific.s_metadata;
inode = mdata->s_metadata_fe ? : mdata->s_mirror_fe;
- /* We shouldn't mount such media... */
- BUG_ON(!inode);
+ if (!inode)
+ return 0xFFFFFFFF;
+
retblk = udf_try_read_meta(inode, block, partition, offset);
if (retblk == 0xFFFFFFFF && mdata->s_metadata_fe) {
udf_warn(sb, "error reading from METADATA, trying to read from MIRROR\n");
if (!(mdata->s_flags & MF_MIRROR_FE_LOADED)) {
mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
- mdata->s_mirror_file_loc, map->s_partition_num);
+ mdata->s_mirror_file_loc,
+ mdata->s_phys_partition_ref);
+ if (IS_ERR(mdata->s_mirror_fe))
+ mdata->s_mirror_fe = NULL;
mdata->s_flags |= MF_MIRROR_FE_LOADED;
}
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 9ac4057a86c9..b2f168b0a0d1 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* super.c
*
@@ -11,15 +12,10 @@
* This code is based on version 2.00 of the UDF specification,
* and revision 3 of the ECMA 167 standard [equivalent to ISO 13346].
* http://www.osta.org/
- * http://www.ecma.ch/
- * http://www.iso.org/
+ * https://www.ecma.ch/
+ * https://www.iso.org/
*
* COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
- *
* (C) 1998 Dave Boynton
* (C) 1998-2004 Ben Fennema
* (C) 2000 Stelias Computing Inc
@@ -44,79 +40,108 @@
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/parser.h>
#include <linux/stat.h>
#include <linux/cdrom.h>
#include <linux/nls.h>
-#include <linux/buffer_head.h>
#include <linux/vfs.h>
#include <linux/vmalloc.h>
#include <linux/errno.h>
-#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/bitmap.h>
#include <linux/crc-itu-t.h>
#include <linux/log2.h>
#include <asm/byteorder.h>
+#include <linux/iversion.h>
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
#include "udf_sb.h"
#include "udf_i.h"
#include <linux/init.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
-#define VDS_POS_PRIMARY_VOL_DESC 0
-#define VDS_POS_UNALLOC_SPACE_DESC 1
-#define VDS_POS_LOGICAL_VOL_DESC 2
-#define VDS_POS_PARTITION_DESC 3
-#define VDS_POS_IMP_USE_VOL_DESC 4
-#define VDS_POS_VOL_DESC_PTR 5
-#define VDS_POS_TERMINATING_DESC 6
-#define VDS_POS_LENGTH 7
+enum {
+ VDS_POS_PRIMARY_VOL_DESC,
+ VDS_POS_UNALLOC_SPACE_DESC,
+ VDS_POS_LOGICAL_VOL_DESC,
+ VDS_POS_IMP_USE_VOL_DESC,
+ VDS_POS_LENGTH
+};
-#define UDF_DEFAULT_BLOCKSIZE 2048
+#define VSD_FIRST_SECTOR_OFFSET 32768
+#define VSD_MAX_SECTOR_OFFSET 0x800000
+
+/*
+ * Maximum number of Terminating Descriptor / Logical Volume Integrity
+ * Descriptor redirections. The chosen numbers are arbitrary - just that we
+ * hopefully don't limit any real use of rewritten inode on write-once media
+ * but avoid looping for too long on corrupted media.
+ */
+#define UDF_MAX_TD_NESTING 64
+#define UDF_MAX_LVID_NESTING 1000
enum { UDF_MAX_LINKS = 0xffff };
+/*
+ * We limit filesize to 4TB. This is arbitrary as the on-disk format supports
+ * more but because the file space is described by a linked list of extents,
+ * each of which can have at most 1GB, the creation and handling of extents
+ * gets unusably slow beyond certain point...
+ */
+#define UDF_MAX_FILESIZE (1ULL << 42)
/* These are the "meat" - everything else is stuffing */
-static int udf_fill_super(struct super_block *, void *, int);
+static int udf_fill_super(struct super_block *sb, struct fs_context *fc);
static void udf_put_super(struct super_block *);
static int udf_sync_fs(struct super_block *, int);
-static int udf_remount_fs(struct super_block *, int *, char *);
static void udf_load_logicalvolint(struct super_block *, struct kernel_extent_ad);
-static int udf_find_fileset(struct super_block *, struct kernel_lb_addr *,
- struct kernel_lb_addr *);
-static void udf_load_fileset(struct super_block *, struct buffer_head *,
- struct kernel_lb_addr *);
static void udf_open_lvid(struct super_block *);
static void udf_close_lvid(struct super_block *);
static unsigned int udf_count_free(struct super_block *);
static int udf_statfs(struct dentry *, struct kstatfs *);
static int udf_show_options(struct seq_file *, struct dentry *);
+static int udf_init_fs_context(struct fs_context *fc);
+static int udf_parse_param(struct fs_context *fc, struct fs_parameter *param);
+static int udf_reconfigure(struct fs_context *fc);
+static void udf_free_fc(struct fs_context *fc);
+static const struct fs_parameter_spec udf_param_spec[];
-struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi)
+struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb)
{
- struct logicalVolIntegrityDesc *lvid =
- (struct logicalVolIntegrityDesc *)sbi->s_lvid_bh->b_data;
- __u32 number_of_partitions = le32_to_cpu(lvid->numOfPartitions);
- __u32 offset = number_of_partitions * 2 *
- sizeof(uint32_t)/sizeof(uint8_t);
- return (struct logicalVolIntegrityDescImpUse *)&(lvid->impUse[offset]);
+ struct logicalVolIntegrityDesc *lvid;
+ unsigned int partnum;
+ unsigned int offset;
+
+ if (!UDF_SB(sb)->s_lvid_bh)
+ return NULL;
+ lvid = (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data;
+ partnum = le32_to_cpu(lvid->numOfPartitions);
+ /* The offset is to skip freeSpaceTable and sizeTable arrays */
+ offset = partnum * 2 * sizeof(uint32_t);
+ return (struct logicalVolIntegrityDescImpUse *)
+ (((uint8_t *)(lvid + 1)) + offset);
}
/* UDF filesystem type */
-static struct dentry *udf_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name, void *data)
+static int udf_get_tree(struct fs_context *fc)
{
- return mount_bdev(fs_type, flags, dev_name, data, udf_fill_super);
+ return get_tree_bdev(fc, udf_fill_super);
}
+static const struct fs_context_operations udf_context_ops = {
+ .parse_param = udf_parse_param,
+ .get_tree = udf_get_tree,
+ .reconfigure = udf_reconfigure,
+ .free = udf_free_fc,
+};
+
static struct file_system_type udf_fstype = {
.owner = THIS_MODULE,
.name = "udf",
- .mount = udf_mount,
.kill_sb = kill_block_super,
.fs_flags = FS_REQUIRES_DEV,
+ .init_fs_context = udf_init_fs_context,
+ .parameters = udf_param_spec,
};
MODULE_ALIAS_FS("udf");
@@ -125,47 +150,45 @@ static struct kmem_cache *udf_inode_cachep;
static struct inode *udf_alloc_inode(struct super_block *sb)
{
struct udf_inode_info *ei;
- ei = kmem_cache_alloc(udf_inode_cachep, GFP_KERNEL);
+ ei = alloc_inode_sb(sb, udf_inode_cachep, GFP_KERNEL);
if (!ei)
return NULL;
ei->i_unique = 0;
ei->i_lenExtents = 0;
+ ei->i_lenStreams = 0;
ei->i_next_alloc_block = 0;
ei->i_next_alloc_goal = 0;
ei->i_strat4096 = 0;
+ ei->i_streamdir = 0;
+ ei->i_hidden = 0;
init_rwsem(&ei->i_data_sem);
ei->cached_extent.lstart = -1;
spin_lock_init(&ei->i_extent_cache_lock);
+ inode_set_iversion(&ei->vfs_inode, 1);
return &ei->vfs_inode;
}
-static void udf_i_callback(struct rcu_head *head)
+static void udf_free_in_core_inode(struct inode *inode)
{
- struct inode *inode = container_of(head, struct inode, i_rcu);
kmem_cache_free(udf_inode_cachep, UDF_I(inode));
}
-static void udf_destroy_inode(struct inode *inode)
-{
- call_rcu(&inode->i_rcu, udf_i_callback);
-}
-
static void init_once(void *foo)
{
- struct udf_inode_info *ei = (struct udf_inode_info *)foo;
+ struct udf_inode_info *ei = foo;
- ei->i_ext.i_data = NULL;
+ ei->i_data = NULL;
inode_init_once(&ei->vfs_inode);
}
-static int init_inodecache(void)
+static int __init init_inodecache(void)
{
udf_inode_cachep = kmem_cache_create("udf_inode_cache",
sizeof(struct udf_inode_info),
0, (SLAB_RECLAIM_ACCOUNT |
- SLAB_MEM_SPREAD),
+ SLAB_ACCOUNT),
init_once);
if (!udf_inode_cachep)
return -ENOMEM;
@@ -185,26 +208,20 @@ static void destroy_inodecache(void)
/* Superblock operations */
static const struct super_operations udf_sb_ops = {
.alloc_inode = udf_alloc_inode,
- .destroy_inode = udf_destroy_inode,
+ .free_inode = udf_free_in_core_inode,
.write_inode = udf_write_inode,
.evict_inode = udf_evict_inode,
.put_super = udf_put_super,
.sync_fs = udf_sync_fs,
.statfs = udf_statfs,
- .remount_fs = udf_remount_fs,
.show_options = udf_show_options,
};
struct udf_options {
- unsigned char novrs;
unsigned int blocksize;
unsigned int session;
unsigned int lastblock;
unsigned int anchor;
- unsigned int volume;
- unsigned short partition;
- unsigned int fileset;
- unsigned int rootdir;
unsigned int flags;
umode_t umask;
kgid_t gid;
@@ -214,6 +231,65 @@ struct udf_options {
struct nls_table *nls_map;
};
+/*
+ * UDF has historically preserved prior mount options across
+ * a remount, so copy those here if remounting, otherwise set
+ * initial mount defaults.
+ */
+static void udf_init_options(struct fs_context *fc, struct udf_options *uopt)
+{
+ if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
+ struct super_block *sb = fc->root->d_sb;
+ struct udf_sb_info *sbi = UDF_SB(sb);
+
+ uopt->flags = sbi->s_flags;
+ uopt->uid = sbi->s_uid;
+ uopt->gid = sbi->s_gid;
+ uopt->umask = sbi->s_umask;
+ uopt->fmode = sbi->s_fmode;
+ uopt->dmode = sbi->s_dmode;
+ uopt->nls_map = NULL;
+ } else {
+ uopt->flags = (1 << UDF_FLAG_USE_AD_IN_ICB) |
+ (1 << UDF_FLAG_STRICT);
+ /*
+ * By default we'll use overflow[ug]id when UDF
+ * inode [ug]id == -1
+ */
+ uopt->uid = make_kuid(current_user_ns(), overflowuid);
+ uopt->gid = make_kgid(current_user_ns(), overflowgid);
+ uopt->umask = 0;
+ uopt->fmode = UDF_INVALID_MODE;
+ uopt->dmode = UDF_INVALID_MODE;
+ uopt->nls_map = NULL;
+ uopt->session = 0xFFFFFFFF;
+ }
+}
+
+static int udf_init_fs_context(struct fs_context *fc)
+{
+ struct udf_options *uopt;
+
+ uopt = kzalloc(sizeof(*uopt), GFP_KERNEL);
+ if (!uopt)
+ return -ENOMEM;
+
+ udf_init_options(fc, uopt);
+
+ fc->fs_private = uopt;
+ fc->ops = &udf_context_ops;
+
+ return 0;
+}
+
+static void udf_free_fc(struct fs_context *fc)
+{
+ struct udf_options *uopt = fc->fs_private;
+
+ unload_nls(uopt->nls_map);
+ kfree(fc->fs_private);
+}
+
static int __init init_udf_fs(void)
{
int err;
@@ -240,18 +316,12 @@ static void __exit exit_udf_fs(void)
destroy_inodecache();
}
-module_init(init_udf_fs)
-module_exit(exit_udf_fs)
-
static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
{
struct udf_sb_info *sbi = UDF_SB(sb);
- sbi->s_partmaps = kcalloc(count, sizeof(struct udf_part_map),
- GFP_KERNEL);
+ sbi->s_partmaps = kcalloc(count, sizeof(*sbi->s_partmaps), GFP_KERNEL);
if (!sbi->s_partmaps) {
- udf_err(sb, "Unable to allocate space for %d partition maps\n",
- count);
sbi->s_partitions = 0;
return -ENOMEM;
}
@@ -264,17 +334,12 @@ static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
{
int i;
int nr_groups = bitmap->s_nr_groups;
- int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
- nr_groups);
for (i = 0; i < nr_groups; i++)
- if (bitmap->s_block_bitmap[i])
+ if (!IS_ERR_OR_NULL(bitmap->s_block_bitmap[i]))
brelse(bitmap->s_block_bitmap[i]);
- if (size <= PAGE_SIZE)
- kfree(bitmap);
- else
- vfree(bitmap);
+ kvfree(bitmap);
}
static void udf_free_partition(struct udf_part_map *map)
@@ -284,12 +349,8 @@ static void udf_free_partition(struct udf_part_map *map)
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
iput(map->s_uspace.s_table);
- if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
- iput(map->s_fspace.s_table);
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
udf_sb_free_bitmap(map->s_uspace.s_bitmap);
- if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
- udf_sb_free_bitmap(map->s_fspace.s_bitmap);
if (map->s_partition_type == UDF_SPARABLE_MAP15)
for (i = 0; i < 4; i++)
brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
@@ -310,7 +371,8 @@ static void udf_sb_free_partitions(struct super_block *sb)
{
struct udf_sb_info *sbi = UDF_SB(sb);
int i;
- if (sbi->s_partmaps == NULL)
+
+ if (!sbi->s_partmaps)
return;
for (i = 0; i < sbi->s_partitions; i++)
udf_free_partition(&sbi->s_partmaps[i]);
@@ -337,12 +399,8 @@ static int udf_show_options(struct seq_file *seq, struct dentry *root)
seq_puts(seq, ",shortad");
if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_FORGET))
seq_puts(seq, ",uid=forget");
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_IGNORE))
- seq_puts(seq, ",uid=ignore");
if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_FORGET))
seq_puts(seq, ",gid=forget");
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_IGNORE))
- seq_puts(seq, ",gid=ignore");
if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
seq_printf(seq, ",uid=%u", from_kuid(&init_user_ns, sbi->s_uid));
if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
@@ -354,25 +412,21 @@ static int udf_show_options(struct seq_file *seq, struct dentry *root)
if (sbi->s_dmode != UDF_INVALID_MODE)
seq_printf(seq, ",dmode=%ho", sbi->s_dmode);
if (UDF_QUERY_FLAG(sb, UDF_FLAG_SESSION_SET))
- seq_printf(seq, ",session=%u", sbi->s_session);
+ seq_printf(seq, ",session=%d", sbi->s_session);
if (UDF_QUERY_FLAG(sb, UDF_FLAG_LASTBLOCK_SET))
seq_printf(seq, ",lastblock=%u", sbi->s_last_block);
if (sbi->s_anchor != 0)
seq_printf(seq, ",anchor=%u", sbi->s_anchor);
- /*
- * volume, partition, fileset and rootdir seem to be ignored
- * currently
- */
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8))
- seq_puts(seq, ",utf8");
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP) && sbi->s_nls_map)
+ if (sbi->s_nls_map)
seq_printf(seq, ",iocharset=%s", sbi->s_nls_map->charset);
+ else
+ seq_puts(seq, ",iocharset=utf8");
return 0;
}
/*
- * udf_parse_options
+ * udf_parse_param
*
* PURPOSE
* Parse mount options.
@@ -415,12 +469,12 @@ static int udf_show_options(struct seq_file *seq, struct dentry *root)
* yield highly unpredictable results.
*
* PRE-CONDITIONS
- * options Pointer to mount options string.
- * uopts Pointer to mount options variable.
+ * fc fs_context with pointer to mount options variable.
+ * param Pointer to fs_parameter being parsed.
*
* POST-CONDITIONS
- * <return> 1 Mount options parsed okay.
- * <return> 0 Error parsing mount options.
+ * <return> 0 Mount options parsed okay.
+ * <return> errno Error parsing mount options.
*
* HISTORY
* July 1, 1997 - Andrew E. Mileski
@@ -432,233 +486,193 @@ enum {
Opt_noadinicb, Opt_adinicb, Opt_shortad, Opt_longad,
Opt_gid, Opt_uid, Opt_umask, Opt_session, Opt_lastblock,
Opt_anchor, Opt_volume, Opt_partition, Opt_fileset,
- Opt_rootdir, Opt_utf8, Opt_iocharset,
- Opt_err, Opt_uforget, Opt_uignore, Opt_gforget, Opt_gignore,
- Opt_fmode, Opt_dmode
-};
-
-static const match_table_t tokens = {
- {Opt_novrs, "novrs"},
- {Opt_nostrict, "nostrict"},
- {Opt_bs, "bs=%u"},
- {Opt_unhide, "unhide"},
- {Opt_undelete, "undelete"},
- {Opt_noadinicb, "noadinicb"},
- {Opt_adinicb, "adinicb"},
- {Opt_shortad, "shortad"},
- {Opt_longad, "longad"},
- {Opt_uforget, "uid=forget"},
- {Opt_uignore, "uid=ignore"},
- {Opt_gforget, "gid=forget"},
- {Opt_gignore, "gid=ignore"},
- {Opt_gid, "gid=%u"},
- {Opt_uid, "uid=%u"},
- {Opt_umask, "umask=%o"},
- {Opt_session, "session=%u"},
- {Opt_lastblock, "lastblock=%u"},
- {Opt_anchor, "anchor=%u"},
- {Opt_volume, "volume=%u"},
- {Opt_partition, "partition=%u"},
- {Opt_fileset, "fileset=%u"},
- {Opt_rootdir, "rootdir=%u"},
- {Opt_utf8, "utf8"},
- {Opt_iocharset, "iocharset=%s"},
- {Opt_fmode, "mode=%o"},
- {Opt_dmode, "dmode=%o"},
- {Opt_err, NULL}
+ Opt_rootdir, Opt_utf8, Opt_iocharset, Opt_err, Opt_fmode, Opt_dmode
};
-static int udf_parse_options(char *options, struct udf_options *uopt,
- bool remount)
+static const struct fs_parameter_spec udf_param_spec[] = {
+ fsparam_flag ("novrs", Opt_novrs),
+ fsparam_flag ("nostrict", Opt_nostrict),
+ fsparam_u32 ("bs", Opt_bs),
+ fsparam_flag ("unhide", Opt_unhide),
+ fsparam_flag ("undelete", Opt_undelete),
+ fsparam_flag_no ("adinicb", Opt_adinicb),
+ fsparam_flag ("shortad", Opt_shortad),
+ fsparam_flag ("longad", Opt_longad),
+ fsparam_string ("gid", Opt_gid),
+ fsparam_string ("uid", Opt_uid),
+ fsparam_u32 ("umask", Opt_umask),
+ fsparam_u32 ("session", Opt_session),
+ fsparam_u32 ("lastblock", Opt_lastblock),
+ fsparam_u32 ("anchor", Opt_anchor),
+ fsparam_u32 ("volume", Opt_volume),
+ fsparam_u32 ("partition", Opt_partition),
+ fsparam_u32 ("fileset", Opt_fileset),
+ fsparam_u32 ("rootdir", Opt_rootdir),
+ fsparam_flag ("utf8", Opt_utf8),
+ fsparam_string ("iocharset", Opt_iocharset),
+ fsparam_u32 ("mode", Opt_fmode),
+ fsparam_u32 ("dmode", Opt_dmode),
+ {}
+ };
+
+static int udf_parse_param(struct fs_context *fc, struct fs_parameter *param)
{
- char *p;
- int option;
-
- uopt->novrs = 0;
- uopt->partition = 0xFFFF;
- uopt->session = 0xFFFFFFFF;
- uopt->lastblock = 0;
- uopt->anchor = 0;
- uopt->volume = 0xFFFFFFFF;
- uopt->rootdir = 0xFFFFFFFF;
- uopt->fileset = 0xFFFFFFFF;
- uopt->nls_map = NULL;
-
- if (!options)
- return 1;
-
- while ((p = strsep(&options, ",")) != NULL) {
- substring_t args[MAX_OPT_ARGS];
- int token;
- if (!*p)
- continue;
-
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_novrs:
- uopt->novrs = 1;
- break;
- case Opt_bs:
- if (match_int(&args[0], &option))
- return 0;
- uopt->blocksize = option;
- uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
- break;
- case Opt_unhide:
- uopt->flags |= (1 << UDF_FLAG_UNHIDE);
- break;
- case Opt_undelete:
- uopt->flags |= (1 << UDF_FLAG_UNDELETE);
- break;
- case Opt_noadinicb:
+ unsigned int uv;
+ unsigned int n;
+ struct udf_options *uopt = fc->fs_private;
+ struct fs_parse_result result;
+ int token;
+ bool remount = (fc->purpose & FS_CONTEXT_FOR_RECONFIGURE);
+
+ token = fs_parse(fc, udf_param_spec, param, &result);
+ if (token < 0)
+ return token;
+
+ switch (token) {
+ case Opt_novrs:
+ uopt->flags |= (1 << UDF_FLAG_NOVRS);
+ break;
+ case Opt_bs:
+ n = result.uint_32;
+ if (n != 512 && n != 1024 && n != 2048 && n != 4096)
+ return -EINVAL;
+ uopt->blocksize = n;
+ uopt->flags |= (1 << UDF_FLAG_BLOCKSIZE_SET);
+ break;
+ case Opt_unhide:
+ uopt->flags |= (1 << UDF_FLAG_UNHIDE);
+ break;
+ case Opt_undelete:
+ uopt->flags |= (1 << UDF_FLAG_UNDELETE);
+ break;
+ case Opt_adinicb:
+ if (result.negated)
uopt->flags &= ~(1 << UDF_FLAG_USE_AD_IN_ICB);
- break;
- case Opt_adinicb:
+ else
uopt->flags |= (1 << UDF_FLAG_USE_AD_IN_ICB);
- break;
- case Opt_shortad:
- uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
- break;
- case Opt_longad:
- uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
- break;
- case Opt_gid:
- if (match_int(args, &option))
- return 0;
- uopt->gid = make_kgid(current_user_ns(), option);
- if (!gid_valid(uopt->gid))
- return 0;
+ break;
+ case Opt_shortad:
+ uopt->flags |= (1 << UDF_FLAG_USE_SHORT_AD);
+ break;
+ case Opt_longad:
+ uopt->flags &= ~(1 << UDF_FLAG_USE_SHORT_AD);
+ break;
+ case Opt_gid:
+ if (kstrtoint(param->string, 10, &uv) == 0) {
+ kgid_t gid = make_kgid(current_user_ns(), uv);
+ if (!gid_valid(gid))
+ return -EINVAL;
+ uopt->gid = gid;
uopt->flags |= (1 << UDF_FLAG_GID_SET);
- break;
- case Opt_uid:
- if (match_int(args, &option))
- return 0;
- uopt->uid = make_kuid(current_user_ns(), option);
- if (!uid_valid(uopt->uid))
- return 0;
+ } else if (!strcmp(param->string, "forget")) {
+ uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
+ } else if (!strcmp(param->string, "ignore")) {
+ /* this option is superseded by gid=<number> */
+ ;
+ } else {
+ return -EINVAL;
+ }
+ break;
+ case Opt_uid:
+ if (kstrtoint(param->string, 10, &uv) == 0) {
+ kuid_t uid = make_kuid(current_user_ns(), uv);
+ if (!uid_valid(uid))
+ return -EINVAL;
+ uopt->uid = uid;
uopt->flags |= (1 << UDF_FLAG_UID_SET);
- break;
- case Opt_umask:
- if (match_octal(args, &option))
- return 0;
- uopt->umask = option;
- break;
- case Opt_nostrict:
- uopt->flags &= ~(1 << UDF_FLAG_STRICT);
- break;
- case Opt_session:
- if (match_int(args, &option))
- return 0;
- uopt->session = option;
- if (!remount)
- uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
- break;
- case Opt_lastblock:
- if (match_int(args, &option))
- return 0;
- uopt->lastblock = option;
- if (!remount)
- uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
- break;
- case Opt_anchor:
- if (match_int(args, &option))
- return 0;
- uopt->anchor = option;
- break;
- case Opt_volume:
- if (match_int(args, &option))
- return 0;
- uopt->volume = option;
- break;
- case Opt_partition:
- if (match_int(args, &option))
- return 0;
- uopt->partition = option;
- break;
- case Opt_fileset:
- if (match_int(args, &option))
- return 0;
- uopt->fileset = option;
- break;
- case Opt_rootdir:
- if (match_int(args, &option))
- return 0;
- uopt->rootdir = option;
- break;
- case Opt_utf8:
- uopt->flags |= (1 << UDF_FLAG_UTF8);
- break;
-#ifdef CONFIG_UDF_NLS
- case Opt_iocharset:
- uopt->nls_map = load_nls(args[0].from);
- uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
- break;
-#endif
- case Opt_uignore:
- uopt->flags |= (1 << UDF_FLAG_UID_IGNORE);
- break;
- case Opt_uforget:
+ } else if (!strcmp(param->string, "forget")) {
uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
- break;
- case Opt_gignore:
- uopt->flags |= (1 << UDF_FLAG_GID_IGNORE);
- break;
- case Opt_gforget:
- uopt->flags |= (1 << UDF_FLAG_GID_FORGET);
- break;
- case Opt_fmode:
- if (match_octal(args, &option))
- return 0;
- uopt->fmode = option & 0777;
- break;
- case Opt_dmode:
- if (match_octal(args, &option))
- return 0;
- uopt->dmode = option & 0777;
- break;
- default:
- pr_err("bad mount option \"%s\" or missing value\n", p);
- return 0;
+ } else if (!strcmp(param->string, "ignore")) {
+ /* this option is superseded by uid=<number> */
+ ;
+ } else {
+ return -EINVAL;
+ }
+ break;
+ case Opt_umask:
+ uopt->umask = result.uint_32;
+ break;
+ case Opt_nostrict:
+ uopt->flags &= ~(1 << UDF_FLAG_STRICT);
+ break;
+ case Opt_session:
+ uopt->session = result.uint_32;
+ if (!remount)
+ uopt->flags |= (1 << UDF_FLAG_SESSION_SET);
+ break;
+ case Opt_lastblock:
+ uopt->lastblock = result.uint_32;
+ if (!remount)
+ uopt->flags |= (1 << UDF_FLAG_LASTBLOCK_SET);
+ break;
+ case Opt_anchor:
+ uopt->anchor = result.uint_32;
+ break;
+ case Opt_volume:
+ case Opt_partition:
+ case Opt_fileset:
+ case Opt_rootdir:
+ /* Ignored (never implemented properly) */
+ break;
+ case Opt_utf8:
+ if (!remount) {
+ unload_nls(uopt->nls_map);
+ uopt->nls_map = NULL;
}
+ break;
+ case Opt_iocharset:
+ if (!remount) {
+ unload_nls(uopt->nls_map);
+ uopt->nls_map = NULL;
+ }
+ /* When nls_map is not loaded then UTF-8 is used */
+ if (!remount && strcmp(param->string, "utf8") != 0) {
+ uopt->nls_map = load_nls(param->string);
+ if (!uopt->nls_map) {
+ errorf(fc, "iocharset %s not found",
+ param->string);
+ return -EINVAL;
+ }
+ }
+ break;
+ case Opt_fmode:
+ uopt->fmode = result.uint_32 & 0777;
+ break;
+ case Opt_dmode:
+ uopt->dmode = result.uint_32 & 0777;
+ break;
+ default:
+ return -EINVAL;
}
- return 1;
+ return 0;
}
-static int udf_remount_fs(struct super_block *sb, int *flags, char *options)
+static int udf_reconfigure(struct fs_context *fc)
{
- struct udf_options uopt;
+ struct udf_options *uopt = fc->fs_private;
+ struct super_block *sb = fc->root->d_sb;
struct udf_sb_info *sbi = UDF_SB(sb);
+ int readonly = fc->sb_flags & SB_RDONLY;
int error = 0;
- uopt.flags = sbi->s_flags;
- uopt.uid = sbi->s_uid;
- uopt.gid = sbi->s_gid;
- uopt.umask = sbi->s_umask;
- uopt.fmode = sbi->s_fmode;
- uopt.dmode = sbi->s_dmode;
+ if (!readonly && UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT))
+ return -EACCES;
- if (!udf_parse_options(options, &uopt, true))
- return -EINVAL;
+ sync_filesystem(sb);
write_lock(&sbi->s_cred_lock);
- sbi->s_flags = uopt.flags;
- sbi->s_uid = uopt.uid;
- sbi->s_gid = uopt.gid;
- sbi->s_umask = uopt.umask;
- sbi->s_fmode = uopt.fmode;
- sbi->s_dmode = uopt.dmode;
+ sbi->s_flags = uopt->flags;
+ sbi->s_uid = uopt->uid;
+ sbi->s_gid = uopt->gid;
+ sbi->s_umask = uopt->umask;
+ sbi->s_fmode = uopt->fmode;
+ sbi->s_dmode = uopt->dmode;
write_unlock(&sbi->s_cred_lock);
- if (sbi->s_lvid_bh) {
- int write_rev = le16_to_cpu(udf_sb_lvidiu(sbi)->minUDFWriteRev);
- if (write_rev > UDF_MAX_WRITE_VERSION)
- *flags |= MS_RDONLY;
- }
-
- if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY))
+ if (readonly == sb_rdonly(sb))
goto out_unlock;
- if (*flags & MS_RDONLY)
+ if (readonly)
udf_close_lvid(sb);
else
udf_open_lvid(sb);
@@ -667,17 +681,69 @@ out_unlock:
return error;
}
-/* Check Volume Structure Descriptors (ECMA 167 2/9.1) */
-/* We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1) */
-static loff_t udf_check_vsd(struct super_block *sb)
+/*
+ * Check VSD descriptor. Returns -1 in case we are at the end of volume
+ * recognition area, 0 if the descriptor is valid but non-interesting, 1 if
+ * we found one of NSR descriptors we are looking for.
+ */
+static int identify_vsd(const struct volStructDesc *vsd)
+{
+ int ret = 0;
+
+ if (!memcmp(vsd->stdIdent, VSD_STD_ID_CD001, VSD_STD_ID_LEN)) {
+ switch (vsd->structType) {
+ case 0:
+ udf_debug("ISO9660 Boot Record found\n");
+ break;
+ case 1:
+ udf_debug("ISO9660 Primary Volume Descriptor found\n");
+ break;
+ case 2:
+ udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
+ break;
+ case 3:
+ udf_debug("ISO9660 Volume Partition Descriptor found\n");
+ break;
+ case 255:
+ udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
+ break;
+ default:
+ udf_debug("ISO9660 VRS (%u) found\n", vsd->structType);
+ break;
+ }
+ } else if (!memcmp(vsd->stdIdent, VSD_STD_ID_BEA01, VSD_STD_ID_LEN))
+ ; /* ret = 0 */
+ else if (!memcmp(vsd->stdIdent, VSD_STD_ID_NSR02, VSD_STD_ID_LEN))
+ ret = 1;
+ else if (!memcmp(vsd->stdIdent, VSD_STD_ID_NSR03, VSD_STD_ID_LEN))
+ ret = 1;
+ else if (!memcmp(vsd->stdIdent, VSD_STD_ID_BOOT2, VSD_STD_ID_LEN))
+ ; /* ret = 0 */
+ else if (!memcmp(vsd->stdIdent, VSD_STD_ID_CDW02, VSD_STD_ID_LEN))
+ ; /* ret = 0 */
+ else {
+ /* TEA01 or invalid id : end of volume recognition area */
+ ret = -1;
+ }
+
+ return ret;
+}
+
+/*
+ * Check Volume Structure Descriptors (ECMA 167 2/9.1)
+ * We also check any "CD-ROM Volume Descriptor Set" (ECMA 167 2/8.3.1)
+ * @return 1 if NSR02 or NSR03 found,
+ * -1 if first sector read error, 0 otherwise
+ */
+static int udf_check_vsd(struct super_block *sb)
{
struct volStructDesc *vsd = NULL;
- loff_t sector = 32768;
+ loff_t sector = VSD_FIRST_SECTOR_OFFSET;
int sectorsize;
struct buffer_head *bh = NULL;
- int nsr02 = 0;
- int nsr03 = 0;
+ int nsr = 0;
struct udf_sb_info *sbi;
+ loff_t session_offset;
sbi = UDF_SB(sb);
if (sb->s_blocksize < sizeof(struct volStructDesc))
@@ -685,271 +751,260 @@ static loff_t udf_check_vsd(struct super_block *sb)
else
sectorsize = sb->s_blocksize;
- sector += (sbi->s_session << sb->s_blocksize_bits);
+ session_offset = (loff_t)sbi->s_session << sb->s_blocksize_bits;
+ sector += session_offset;
- udf_debug("Starting at sector %u (%ld byte sectors)\n",
+ udf_debug("Starting at sector %u (%lu byte sectors)\n",
(unsigned int)(sector >> sb->s_blocksize_bits),
sb->s_blocksize);
- /* Process the sequence (if applicable) */
- for (; !nsr02 && !nsr03; sector += sectorsize) {
+ /* Process the sequence (if applicable). The hard limit on the sector
+ * offset is arbitrary, hopefully large enough so that all valid UDF
+ * filesystems will be recognised. There is no mention of an upper
+ * bound to the size of the volume recognition area in the standard.
+ * The limit will prevent the code to read all the sectors of a
+ * specially crafted image (like a bluray disc full of CD001 sectors),
+ * potentially causing minutes or even hours of uninterruptible I/O
+ * activity. This actually happened with uninitialised SSD partitions
+ * (all 0xFF) before the check for the limit and all valid IDs were
+ * added */
+ for (; !nsr && sector < VSD_MAX_SECTOR_OFFSET; sector += sectorsize) {
/* Read a block */
- bh = udf_tread(sb, sector >> sb->s_blocksize_bits);
+ bh = sb_bread(sb, sector >> sb->s_blocksize_bits);
if (!bh)
break;
- /* Look for ISO descriptors */
vsd = (struct volStructDesc *)(bh->b_data +
(sector & (sb->s_blocksize - 1)));
-
- if (vsd->stdIdent[0] == 0) {
- brelse(bh);
- break;
- } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_CD001,
- VSD_STD_ID_LEN)) {
- switch (vsd->structType) {
- case 0:
- udf_debug("ISO9660 Boot Record found\n");
- break;
- case 1:
- udf_debug("ISO9660 Primary Volume Descriptor found\n");
- break;
- case 2:
- udf_debug("ISO9660 Supplementary Volume Descriptor found\n");
- break;
- case 3:
- udf_debug("ISO9660 Volume Partition Descriptor found\n");
- break;
- case 255:
- udf_debug("ISO9660 Volume Descriptor Set Terminator found\n");
- break;
- default:
- udf_debug("ISO9660 VRS (%u) found\n",
- vsd->structType);
- break;
- }
- } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_BEA01,
- VSD_STD_ID_LEN))
- ; /* nothing */
- else if (!strncmp(vsd->stdIdent, VSD_STD_ID_TEA01,
- VSD_STD_ID_LEN)) {
+ nsr = identify_vsd(vsd);
+ /* Found NSR or end? */
+ if (nsr) {
brelse(bh);
break;
- } else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR02,
- VSD_STD_ID_LEN))
- nsr02 = sector;
- else if (!strncmp(vsd->stdIdent, VSD_STD_ID_NSR03,
- VSD_STD_ID_LEN))
- nsr03 = sector;
+ }
+ /*
+ * Special handling for improperly formatted VRS (e.g., Win10)
+ * where components are separated by 2048 bytes even though
+ * sectors are 4K
+ */
+ if (sb->s_blocksize == 4096) {
+ nsr = identify_vsd(vsd + 1);
+ /* Ignore unknown IDs... */
+ if (nsr < 0)
+ nsr = 0;
+ }
brelse(bh);
}
- if (nsr03)
- return nsr03;
- else if (nsr02)
- return nsr02;
- else if (sector - (sbi->s_session << sb->s_blocksize_bits) == 32768)
+ if (nsr > 0)
+ return 1;
+ else if (!bh && sector - session_offset == VSD_FIRST_SECTOR_OFFSET)
return -1;
else
return 0;
}
-static int udf_find_fileset(struct super_block *sb,
- struct kernel_lb_addr *fileset,
- struct kernel_lb_addr *root)
+static int udf_verify_domain_identifier(struct super_block *sb,
+ struct regid *ident, char *dname)
{
- struct buffer_head *bh = NULL;
- long lastblock;
- uint16_t ident;
- struct udf_sb_info *sbi;
+ struct domainIdentSuffix *suffix;
- if (fileset->logicalBlockNum != 0xFFFFFFFF ||
- fileset->partitionReferenceNum != 0xFFFF) {
- bh = udf_read_ptagged(sb, fileset, 0, &ident);
-
- if (!bh) {
- return 1;
- } else if (ident != TAG_IDENT_FSD) {
- brelse(bh);
- return 1;
+ if (memcmp(ident->ident, UDF_ID_COMPLIANT, strlen(UDF_ID_COMPLIANT))) {
+ udf_warn(sb, "Not OSTA UDF compliant %s descriptor.\n", dname);
+ goto force_ro;
+ }
+ if (ident->flags & ENTITYID_FLAGS_DIRTY) {
+ udf_warn(sb, "Possibly not OSTA UDF compliant %s descriptor.\n",
+ dname);
+ goto force_ro;
+ }
+ suffix = (struct domainIdentSuffix *)ident->identSuffix;
+ if ((suffix->domainFlags & DOMAIN_FLAGS_HARD_WRITE_PROTECT) ||
+ (suffix->domainFlags & DOMAIN_FLAGS_SOFT_WRITE_PROTECT)) {
+ if (!sb_rdonly(sb)) {
+ udf_warn(sb, "Descriptor for %s marked write protected."
+ " Forcing read only mount.\n", dname);
}
-
+ goto force_ro;
}
+ return 0;
- sbi = UDF_SB(sb);
- if (!bh) {
- /* Search backwards through the partitions */
- struct kernel_lb_addr newfileset;
+force_ro:
+ if (!sb_rdonly(sb))
+ return -EACCES;
+ UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
+ return 0;
+}
-/* --> cvg: FIXME - is it reasonable? */
- return 1;
+static int udf_load_fileset(struct super_block *sb, struct fileSetDesc *fset,
+ struct kernel_lb_addr *root)
+{
+ int ret;
- for (newfileset.partitionReferenceNum = sbi->s_partitions - 1;
- (newfileset.partitionReferenceNum != 0xFFFF &&
- fileset->logicalBlockNum == 0xFFFFFFFF &&
- fileset->partitionReferenceNum == 0xFFFF);
- newfileset.partitionReferenceNum--) {
- lastblock = sbi->s_partmaps
- [newfileset.partitionReferenceNum]
- .s_partition_len;
- newfileset.logicalBlockNum = 0;
-
- do {
- bh = udf_read_ptagged(sb, &newfileset, 0,
- &ident);
- if (!bh) {
- newfileset.logicalBlockNum++;
- continue;
- }
+ ret = udf_verify_domain_identifier(sb, &fset->domainIdent, "file set");
+ if (ret < 0)
+ return ret;
- switch (ident) {
- case TAG_IDENT_SBD:
- {
- struct spaceBitmapDesc *sp;
- sp = (struct spaceBitmapDesc *)
- bh->b_data;
- newfileset.logicalBlockNum += 1 +
- ((le32_to_cpu(sp->numOfBytes) +
- sizeof(struct spaceBitmapDesc)
- - 1) >> sb->s_blocksize_bits);
- brelse(bh);
- break;
- }
- case TAG_IDENT_FSD:
- *fileset = newfileset;
- break;
- default:
- newfileset.logicalBlockNum++;
- brelse(bh);
- bh = NULL;
- break;
- }
- } while (newfileset.logicalBlockNum < lastblock &&
- fileset->logicalBlockNum == 0xFFFFFFFF &&
- fileset->partitionReferenceNum == 0xFFFF);
- }
- }
+ *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
+ UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
- if ((fileset->logicalBlockNum != 0xFFFFFFFF ||
- fileset->partitionReferenceNum != 0xFFFF) && bh) {
- udf_debug("Fileset at block=%d, partition=%d\n",
- fileset->logicalBlockNum,
- fileset->partitionReferenceNum);
+ udf_debug("Rootdir at block=%u, partition=%u\n",
+ root->logicalBlockNum, root->partitionReferenceNum);
+ return 0;
+}
- sbi->s_partition = fileset->partitionReferenceNum;
- udf_load_fileset(sb, bh, root);
+static int udf_find_fileset(struct super_block *sb,
+ struct kernel_lb_addr *fileset,
+ struct kernel_lb_addr *root)
+{
+ struct buffer_head *bh;
+ uint16_t ident;
+ int ret;
+
+ if (fileset->logicalBlockNum == 0xFFFFFFFF &&
+ fileset->partitionReferenceNum == 0xFFFF)
+ return -EINVAL;
+
+ bh = udf_read_ptagged(sb, fileset, 0, &ident);
+ if (!bh)
+ return -EIO;
+ if (ident != TAG_IDENT_FSD) {
brelse(bh);
- return 0;
+ return -EINVAL;
}
- return 1;
+
+ udf_debug("Fileset at block=%u, partition=%u\n",
+ fileset->logicalBlockNum, fileset->partitionReferenceNum);
+
+ UDF_SB(sb)->s_partition = fileset->partitionReferenceNum;
+ ret = udf_load_fileset(sb, (struct fileSetDesc *)bh->b_data, root);
+ brelse(bh);
+ return ret;
}
+/*
+ * Load primary Volume Descriptor Sequence
+ *
+ * Return <0 on error, 0 on success. -EAGAIN is special meaning next sequence
+ * should be tried.
+ */
static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
{
struct primaryVolDesc *pvoldesc;
- struct ustr *instr, *outstr;
+ uint8_t *outstr;
struct buffer_head *bh;
uint16_t ident;
- int ret = 1;
-
- instr = kmalloc(sizeof(struct ustr), GFP_NOFS);
- if (!instr)
- return 1;
+ int ret;
+ struct timestamp *ts;
- outstr = kmalloc(sizeof(struct ustr), GFP_NOFS);
+ outstr = kzalloc(128, GFP_KERNEL);
if (!outstr)
- goto out1;
+ return -ENOMEM;
bh = udf_read_tagged(sb, block, block, &ident);
- if (!bh)
+ if (!bh) {
+ ret = -EAGAIN;
goto out2;
+ }
- BUG_ON(ident != TAG_IDENT_PVD);
+ if (ident != TAG_IDENT_PVD) {
+ ret = -EIO;
+ goto out_bh;
+ }
pvoldesc = (struct primaryVolDesc *)bh->b_data;
- if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
- pvoldesc->recordingDateAndTime)) {
-#ifdef UDFFS_DEBUG
- struct timestamp *ts = &pvoldesc->recordingDateAndTime;
- udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
- le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
- ts->minute, le16_to_cpu(ts->typeAndTimezone));
-#endif
- }
-
- if (!udf_build_ustr(instr, pvoldesc->volIdent, 32))
- if (udf_CS0toUTF8(outstr, instr)) {
- strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name,
- outstr->u_len > 31 ? 31 : outstr->u_len);
- udf_debug("volIdent[] = '%s'\n",
- UDF_SB(sb)->s_volume_ident);
- }
+ udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
+ pvoldesc->recordingDateAndTime);
+ ts = &pvoldesc->recordingDateAndTime;
+ udf_debug("recording time %04u/%02u/%02u %02u:%02u (%x)\n",
+ le16_to_cpu(ts->year), ts->month, ts->day, ts->hour,
+ ts->minute, le16_to_cpu(ts->typeAndTimezone));
+
+ ret = udf_dstrCS0toChar(sb, outstr, 31, pvoldesc->volIdent, 32);
+ if (ret < 0) {
+ strscpy_pad(UDF_SB(sb)->s_volume_ident, "InvalidName");
+ pr_warn("incorrect volume identification, setting to "
+ "'InvalidName'\n");
+ } else {
+ strscpy_pad(UDF_SB(sb)->s_volume_ident, outstr);
+ }
+ udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
- if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128))
- if (udf_CS0toUTF8(outstr, instr))
- udf_debug("volSetIdent[] = '%s'\n", outstr->u_name);
+ ret = udf_dstrCS0toChar(sb, outstr, 127, pvoldesc->volSetIdent, 128);
+ if (ret < 0) {
+ ret = 0;
+ goto out_bh;
+ }
+ outstr[ret] = 0;
+ udf_debug("volSetIdent[] = '%s'\n", outstr);
- brelse(bh);
ret = 0;
+out_bh:
+ brelse(bh);
out2:
kfree(outstr);
-out1:
- kfree(instr);
return ret;
}
struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
- u32 meta_file_loc, u32 partition_num)
+ u32 meta_file_loc, u32 partition_ref)
{
struct kernel_lb_addr addr;
struct inode *metadata_fe;
addr.logicalBlockNum = meta_file_loc;
- addr.partitionReferenceNum = partition_num;
+ addr.partitionReferenceNum = partition_ref;
- metadata_fe = udf_iget(sb, &addr);
+ metadata_fe = udf_iget_special(sb, &addr);
- if (metadata_fe == NULL)
+ if (IS_ERR(metadata_fe)) {
udf_warn(sb, "metadata inode efe not found\n");
- else if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
+ return metadata_fe;
+ }
+ if (UDF_I(metadata_fe)->i_alloc_type != ICBTAG_FLAG_AD_SHORT) {
udf_warn(sb, "metadata inode efe does not have short allocation descriptors!\n");
iput(metadata_fe);
- metadata_fe = NULL;
+ return ERR_PTR(-EIO);
}
return metadata_fe;
}
-static int udf_load_metadata_files(struct super_block *sb, int partition)
+static int udf_load_metadata_files(struct super_block *sb, int partition,
+ int type1_index)
{
struct udf_sb_info *sbi = UDF_SB(sb);
struct udf_part_map *map;
struct udf_meta_data *mdata;
struct kernel_lb_addr addr;
+ struct inode *fe;
map = &sbi->s_partmaps[partition];
mdata = &map->s_type_specific.s_metadata;
+ mdata->s_phys_partition_ref = type1_index;
/* metadata address */
- udf_debug("Metadata file location: block = %d part = %d\n",
- mdata->s_meta_file_loc, map->s_partition_num);
-
- mdata->s_metadata_fe = udf_find_metadata_inode_efe(sb,
- mdata->s_meta_file_loc, map->s_partition_num);
+ udf_debug("Metadata file location: block = %u part = %u\n",
+ mdata->s_meta_file_loc, mdata->s_phys_partition_ref);
- if (mdata->s_metadata_fe == NULL) {
+ fe = udf_find_metadata_inode_efe(sb, mdata->s_meta_file_loc,
+ mdata->s_phys_partition_ref);
+ if (IS_ERR(fe)) {
/* mirror file entry */
- udf_debug("Mirror metadata file location: block = %d part = %d\n",
- mdata->s_mirror_file_loc, map->s_partition_num);
+ udf_debug("Mirror metadata file location: block = %u part = %u\n",
+ mdata->s_mirror_file_loc, mdata->s_phys_partition_ref);
- mdata->s_mirror_fe = udf_find_metadata_inode_efe(sb,
- mdata->s_mirror_file_loc, map->s_partition_num);
+ fe = udf_find_metadata_inode_efe(sb, mdata->s_mirror_file_loc,
+ mdata->s_phys_partition_ref);
- if (mdata->s_mirror_fe == NULL) {
+ if (IS_ERR(fe)) {
udf_err(sb, "Both metadata and mirror metadata inode efe can not found\n");
- goto error_exit;
+ return PTR_ERR(fe);
}
- }
+ mdata->s_mirror_fe = fe;
+ } else
+ mdata->s_metadata_fe = fe;
+
/*
* bitmap file entry
@@ -958,44 +1013,25 @@ static int udf_load_metadata_files(struct super_block *sb, int partition)
*/
if (mdata->s_bitmap_file_loc != 0xFFFFFFFF) {
addr.logicalBlockNum = mdata->s_bitmap_file_loc;
- addr.partitionReferenceNum = map->s_partition_num;
+ addr.partitionReferenceNum = mdata->s_phys_partition_ref;
- udf_debug("Bitmap file location: block = %d part = %d\n",
+ udf_debug("Bitmap file location: block = %u part = %u\n",
addr.logicalBlockNum, addr.partitionReferenceNum);
- mdata->s_bitmap_fe = udf_iget(sb, &addr);
-
- if (mdata->s_bitmap_fe == NULL) {
- if (sb->s_flags & MS_RDONLY)
+ fe = udf_iget_special(sb, &addr);
+ if (IS_ERR(fe)) {
+ if (sb_rdonly(sb))
udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
else {
udf_err(sb, "bitmap inode efe not found and attempted read-write mount\n");
- goto error_exit;
+ return PTR_ERR(fe);
}
- }
+ } else
+ mdata->s_bitmap_fe = fe;
}
udf_debug("udf_load_metadata_files Ok\n");
-
return 0;
-
-error_exit:
- return 1;
-}
-
-static void udf_load_fileset(struct super_block *sb, struct buffer_head *bh,
- struct kernel_lb_addr *root)
-{
- struct fileSetDesc *fset;
-
- fset = (struct fileSetDesc *)bh->b_data;
-
- *root = lelb_to_cpu(fset->rootDirectoryICB.extLocation);
-
- UDF_SB(sb)->s_serial_number = le16_to_cpu(fset->descTag.tagSerialNum);
-
- udf_debug("Rootdir at block=%d, partition=%d\n",
- root->logicalBlockNum, root->partitionReferenceNum);
}
int udf_compute_nr_groups(struct super_block *sb, u32 partition)
@@ -1009,36 +1045,85 @@ int udf_compute_nr_groups(struct super_block *sb, u32 partition)
static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
{
struct udf_bitmap *bitmap;
- int nr_groups;
- int size;
-
- nr_groups = udf_compute_nr_groups(sb, index);
- size = sizeof(struct udf_bitmap) +
- (sizeof(struct buffer_head *) * nr_groups);
-
- if (size <= PAGE_SIZE)
- bitmap = kzalloc(size, GFP_KERNEL);
- else
- bitmap = vzalloc(size); /* TODO: get rid of vzalloc */
+ int nr_groups = udf_compute_nr_groups(sb, index);
- if (bitmap == NULL)
+ bitmap = kvzalloc(struct_size(bitmap, s_block_bitmap, nr_groups),
+ GFP_KERNEL);
+ if (!bitmap)
return NULL;
bitmap->s_nr_groups = nr_groups;
return bitmap;
}
+static int check_partition_desc(struct super_block *sb,
+ struct partitionDesc *p,
+ struct udf_part_map *map)
+{
+ bool umap, utable, fmap, ftable;
+ struct partitionHeaderDesc *phd;
+
+ switch (le32_to_cpu(p->accessType)) {
+ case PD_ACCESS_TYPE_READ_ONLY:
+ case PD_ACCESS_TYPE_WRITE_ONCE:
+ case PD_ACCESS_TYPE_NONE:
+ goto force_ro;
+ }
+
+ /* No Partition Header Descriptor? */
+ if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
+ strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
+ goto force_ro;
+
+ phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
+ utable = phd->unallocSpaceTable.extLength;
+ umap = phd->unallocSpaceBitmap.extLength;
+ ftable = phd->freedSpaceTable.extLength;
+ fmap = phd->freedSpaceBitmap.extLength;
+
+ /* No allocation info? */
+ if (!utable && !umap && !ftable && !fmap)
+ goto force_ro;
+
+ /* We don't support blocks that require erasing before overwrite */
+ if (ftable || fmap)
+ goto force_ro;
+ /* UDF 2.60: 2.3.3 - no mixing of tables & bitmaps, no VAT. */
+ if (utable && umap)
+ goto force_ro;
+
+ if (map->s_partition_type == UDF_VIRTUAL_MAP15 ||
+ map->s_partition_type == UDF_VIRTUAL_MAP20 ||
+ map->s_partition_type == UDF_METADATA_MAP25)
+ goto force_ro;
+
+ return 0;
+force_ro:
+ if (!sb_rdonly(sb))
+ return -EACCES;
+ UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
+ return 0;
+}
+
static int udf_fill_partdesc_info(struct super_block *sb,
struct partitionDesc *p, int p_index)
{
struct udf_part_map *map;
struct udf_sb_info *sbi = UDF_SB(sb);
struct partitionHeaderDesc *phd;
+ u32 sum;
+ int err;
map = &sbi->s_partmaps[p_index];
map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);
+ if (check_add_overflow(map->s_partition_root, map->s_partition_len,
+ &sum)) {
+ udf_err(sb, "Partition %d has invalid location %u + %u\n",
+ p_index, map->s_partition_root, map->s_partition_len);
+ return -EFSCORRUPTED;
+ }
if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
@@ -1049,12 +1134,20 @@ static int udf_fill_partdesc_info(struct super_block *sb,
if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;
- udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
+ udf_debug("Partition (%d type %x) starts at physical %u, block length %u\n",
p_index, map->s_partition_type,
map->s_partition_root, map->s_partition_len);
- if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
- strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
+ err = check_partition_desc(sb, p, map);
+ if (err)
+ return err;
+
+ /*
+ * Skip loading allocation info it we cannot ever write to the fs.
+ * This is a correctness thing as we may have decided to force ro mount
+ * to avoid allocation info we don't support.
+ */
+ if (UDF_QUERY_FLAG(sb, UDF_FLAG_RW_INCOMPAT))
return 0;
phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
@@ -1064,63 +1157,40 @@ static int udf_fill_partdesc_info(struct super_block *sb,
phd->unallocSpaceTable.extPosition),
.partitionReferenceNum = p_index,
};
+ struct inode *inode;
- map->s_uspace.s_table = udf_iget(sb, &loc);
- if (!map->s_uspace.s_table) {
+ inode = udf_iget_special(sb, &loc);
+ if (IS_ERR(inode)) {
udf_debug("cannot load unallocSpaceTable (part %d)\n",
p_index);
- return 1;
+ return PTR_ERR(inode);
}
+ map->s_uspace.s_table = inode;
map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
- udf_debug("unallocSpaceTable (part %d) @ %ld\n",
+ udf_debug("unallocSpaceTable (part %d) @ %lu\n",
p_index, map->s_uspace.s_table->i_ino);
}
if (phd->unallocSpaceBitmap.extLength) {
struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
if (!bitmap)
- return 1;
+ return -ENOMEM;
map->s_uspace.s_bitmap = bitmap;
bitmap->s_extPosition = le32_to_cpu(
phd->unallocSpaceBitmap.extPosition);
map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
- udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
- p_index, bitmap->s_extPosition);
- }
-
- if (phd->partitionIntegrityTable.extLength)
- udf_debug("partitionIntegrityTable (part %d)\n", p_index);
-
- if (phd->freedSpaceTable.extLength) {
- struct kernel_lb_addr loc = {
- .logicalBlockNum = le32_to_cpu(
- phd->freedSpaceTable.extPosition),
- .partitionReferenceNum = p_index,
- };
-
- map->s_fspace.s_table = udf_iget(sb, &loc);
- if (!map->s_fspace.s_table) {
- udf_debug("cannot load freedSpaceTable (part %d)\n",
- p_index);
- return 1;
+ /* Check whether math over bitmap won't overflow. */
+ if (check_add_overflow(map->s_partition_len,
+ sizeof(struct spaceBitmapDesc) << 3,
+ &sum)) {
+ udf_err(sb, "Partition %d is too long (%u)\n", p_index,
+ map->s_partition_len);
+ return -EFSCORRUPTED;
}
-
- map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
- udf_debug("freedSpaceTable (part %d) @ %ld\n",
- p_index, map->s_fspace.s_table->i_ino);
- }
-
- if (phd->freedSpaceBitmap.extLength) {
- struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
- if (!bitmap)
- return 1;
- map->s_fspace.s_bitmap = bitmap;
- bitmap->s_extPosition = le32_to_cpu(
- phd->freedSpaceBitmap.extPosition);
- map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
- udf_debug("freedSpaceBitmap (part %d) @ %d\n",
+ udf_debug("unallocSpaceBitmap (part %d) @ %u\n",
p_index, bitmap->s_extPosition);
}
+
return 0;
}
@@ -1131,6 +1201,7 @@ static void udf_find_vat_block(struct super_block *sb, int p_index,
struct udf_part_map *map = &sbi->s_partmaps[p_index];
sector_t vat_block;
struct kernel_lb_addr ino;
+ struct inode *inode;
/*
* VAT file entry is in the last recorded block. Some broken disks have
@@ -1139,10 +1210,13 @@ static void udf_find_vat_block(struct super_block *sb, int p_index,
ino.partitionReferenceNum = type1_index;
for (vat_block = start_block;
vat_block >= map->s_partition_root &&
- vat_block >= start_block - 3 &&
- !sbi->s_vat_inode; vat_block--) {
+ vat_block >= start_block - 3; vat_block--) {
ino.logicalBlockNum = vat_block - map->s_partition_root;
- sbi->s_vat_inode = udf_iget(sb, &ino);
+ inode = udf_iget_special(sb, &ino);
+ if (!IS_ERR(inode)) {
+ sbi->s_vat_inode = inode;
+ break;
+ }
}
}
@@ -1152,9 +1226,8 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
struct udf_part_map *map = &sbi->s_partmaps[p_index];
struct buffer_head *bh = NULL;
struct udf_inode_info *vati;
- uint32_t pos;
struct virtualAllocationTable20 *vat20;
- sector_t blocks = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits;
+ sector_t blocks = sb_bdev_nr_blocks(sb);
udf_find_vat_block(sb, p_index, type1_index, sbi->s_last_block);
if (!sbi->s_vat_inode &&
@@ -1165,7 +1238,7 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
udf_find_vat_block(sb, p_index, type1_index, blocks - 1);
}
if (!sbi->s_vat_inode)
- return 1;
+ return -EIO;
if (map->s_partition_type == UDF_VIRTUAL_MAP15) {
map->s_type_specific.s_virtual.s_start_offset = 0;
@@ -1174,14 +1247,18 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
} else if (map->s_partition_type == UDF_VIRTUAL_MAP20) {
vati = UDF_I(sbi->s_vat_inode);
if (vati->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
- pos = udf_block_map(sbi->s_vat_inode, 0);
- bh = sb_bread(sb, pos);
- if (!bh)
- return 1;
+ int err = 0;
+
+ bh = udf_bread(sbi->s_vat_inode, 0, 0, &err);
+ if (!bh) {
+ if (!err)
+ err = -EFSCORRUPTED;
+ return err;
+ }
vat20 = (struct virtualAllocationTable20 *)bh->b_data;
} else {
vat20 = (struct virtualAllocationTable20 *)
- vati->i_ext.i_data;
+ vati->i_data;
}
map->s_type_specific.s_virtual.s_start_offset =
@@ -1195,6 +1272,12 @@ static int udf_load_vat(struct super_block *sb, int p_index, int type1_index)
return 0;
}
+/*
+ * Load partition descriptor block
+ *
+ * Returns <0 on error, 0 on success, -EAGAIN is special - try next descriptor
+ * sequence.
+ */
static int udf_load_partdesc(struct super_block *sb, sector_t block)
{
struct buffer_head *bh;
@@ -1204,21 +1287,23 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block)
int i, type1_idx;
uint16_t partitionNumber;
uint16_t ident;
- int ret = 0;
+ int ret;
bh = udf_read_tagged(sb, block, block, &ident);
if (!bh)
- return 1;
- if (ident != TAG_IDENT_PD)
+ return -EAGAIN;
+ if (ident != TAG_IDENT_PD) {
+ ret = 0;
goto out_bh;
+ }
p = (struct partitionDesc *)bh->b_data;
partitionNumber = le16_to_cpu(p->partitionNumber);
- /* First scan for TYPE1, SPARABLE and METADATA partitions */
+ /* First scan for TYPE1 and SPARABLE partitions */
for (i = 0; i < sbi->s_partitions; i++) {
map = &sbi->s_partmaps[i];
- udf_debug("Searching map: (%d == %d)\n",
+ udf_debug("Searching map: (%u == %u)\n",
map->s_partition_num, partitionNumber);
if (map->s_partition_num == partitionNumber &&
(map->s_partition_type == UDF_TYPE1_MAP15 ||
@@ -1227,18 +1312,22 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block)
}
if (i >= sbi->s_partitions) {
- udf_debug("Partition (%d) not found in partition map\n",
+ udf_debug("Partition (%u) not found in partition map\n",
partitionNumber);
+ ret = 0;
goto out_bh;
}
ret = udf_fill_partdesc_info(sb, p, i);
+ if (ret < 0)
+ goto out_bh;
/*
* Now rescan for VIRTUAL or METADATA partitions when SPARABLE and
* PHYSICAL partitions are already set up
*/
type1_idx = i;
+ map = NULL; /* supress 'maybe used uninitialized' warning */
for (i = 0; i < sbi->s_partitions; i++) {
map = &sbi->s_partmaps[i];
@@ -1249,32 +1338,38 @@ static int udf_load_partdesc(struct super_block *sb, sector_t block)
break;
}
- if (i >= sbi->s_partitions)
+ if (i >= sbi->s_partitions) {
+ ret = 0;
goto out_bh;
+ }
ret = udf_fill_partdesc_info(sb, p, i);
- if (ret)
+ if (ret < 0)
goto out_bh;
if (map->s_partition_type == UDF_METADATA_MAP25) {
- ret = udf_load_metadata_files(sb, i);
- if (ret) {
+ ret = udf_load_metadata_files(sb, i, type1_idx);
+ if (ret < 0) {
udf_err(sb, "error loading MetaData partition map %d\n",
i);
goto out_bh;
}
} else {
- ret = udf_load_vat(sb, i, type1_idx);
- if (ret)
- goto out_bh;
/*
- * Mark filesystem read-only if we have a partition with
- * virtual map since we don't handle writing to it (we
- * overwrite blocks instead of relocating them).
+ * If we have a partition with virtual map, we don't handle
+ * writing to it (we overwrite blocks instead of relocating
+ * them).
*/
- sb->s_flags |= MS_RDONLY;
- pr_notice("Filesystem marked read-only because writing to pseudooverwrite partition is not implemented\n");
+ if (!sb_rdonly(sb)) {
+ ret = -EACCES;
+ goto out_bh;
+ }
+ UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
+ ret = udf_load_vat(sb, i, type1_idx);
+ if (ret < 0)
+ goto out_bh;
}
+ ret = 0;
out_bh:
/* In case loading failed, we handle cleanup in udf_fill_super */
brelse(bh);
@@ -1306,6 +1401,12 @@ static int udf_load_sparable_map(struct super_block *sb,
(int)spm->numSparingTables);
return -EIO;
}
+ if (le32_to_cpu(spm->sizeSparingTable) > sb->s_blocksize) {
+ udf_err(sb, "error loading logical volume descriptor: "
+ "Too big sparing table size (%u)\n",
+ le32_to_cpu(spm->sizeSparingTable));
+ return -EIO;
+ }
for (i = 0; i < spm->numSparingTables; i++) {
loc = le32_to_cpu(spm->locSparingTable[i]);
@@ -1339,12 +1440,12 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
struct genericPartitionMap *gpm;
uint16_t ident;
struct buffer_head *bh;
- unsigned int table_len;
- int ret = 0;
+ unsigned int table_len, part_map_count;
+ int ret;
bh = udf_read_tagged(sb, block, block, &ident);
if (!bh)
- return 1;
+ return -EAGAIN;
BUG_ON(ident != TAG_IDENT_LVD);
lvd = (struct logicalVolDesc *)bh->b_data;
table_len = le32_to_cpu(lvd->mapTableLength);
@@ -1352,11 +1453,24 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
udf_err(sb, "error loading logical volume descriptor: "
"Partition table too long (%u > %lu)\n", table_len,
sb->s_blocksize - sizeof(*lvd));
- ret = 1;
+ ret = -EIO;
goto out_bh;
}
- ret = udf_sb_alloc_partition_maps(sb, le32_to_cpu(lvd->numPartitionMaps));
+ ret = udf_verify_domain_identifier(sb, &lvd->domainIdent,
+ "logical volume");
+ if (ret)
+ goto out_bh;
+
+ part_map_count = le32_to_cpu(lvd->numPartitionMaps);
+ if (part_map_count > table_len / sizeof(struct genericPartitionMap1)) {
+ udf_err(sb, "error loading logical volume descriptor: "
+ "Too many partition maps (%u > %u)\n", part_map_count,
+ table_len / (unsigned)sizeof(struct genericPartitionMap1));
+ ret = -EIO;
+ goto out_bh;
+ }
+ ret = udf_sb_alloc_partition_maps(sb, part_map_count);
if (ret)
goto out_bh;
@@ -1396,11 +1510,10 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
} else if (!strncmp(upm2->partIdent.ident,
UDF_ID_SPARABLE,
strlen(UDF_ID_SPARABLE))) {
- if (udf_load_sparable_map(sb, map,
- (struct sparablePartitionMap *)gpm) < 0) {
- ret = 1;
+ ret = udf_load_sparable_map(sb, map,
+ (struct sparablePartitionMap *)gpm);
+ if (ret < 0)
goto out_bh;
- }
} else if (!strncmp(upm2->partIdent.ident,
UDF_ID_METADATA,
strlen(UDF_ID_METADATA))) {
@@ -1409,7 +1522,7 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
struct metadataPartitionMap *mdm =
(struct metadataPartitionMap *)
&(lvd->partitionMaps[offset]);
- udf_debug("Parsing Logical vol part %d type %d id=%s\n",
+ udf_debug("Parsing Logical vol part %d type %u id=%s\n",
i, type, UDF_ID_METADATA);
map->s_partition_type = UDF_METADATA_MAP25;
@@ -1431,17 +1544,17 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
udf_debug("Metadata Ident suffix=0x%x\n",
le16_to_cpu(*(__le16 *)
mdm->partIdent.identSuffix));
- udf_debug("Metadata part num=%d\n",
+ udf_debug("Metadata part num=%u\n",
le16_to_cpu(mdm->partitionNum));
- udf_debug("Metadata part alloc unit size=%d\n",
+ udf_debug("Metadata part alloc unit size=%u\n",
le32_to_cpu(mdm->allocUnitSize));
- udf_debug("Metadata file loc=%d\n",
+ udf_debug("Metadata file loc=%u\n",
le32_to_cpu(mdm->metadataFileLoc));
- udf_debug("Mirror file loc=%d\n",
+ udf_debug("Mirror file loc=%u\n",
le32_to_cpu(mdm->metadataMirrorFileLoc));
- udf_debug("Bitmap file loc=%d\n",
+ udf_debug("Bitmap file loc=%u\n",
le32_to_cpu(mdm->metadataBitmapFileLoc));
- udf_debug("Flags: %d %d\n",
+ udf_debug("Flags: %d %u\n",
mdata->s_flags, mdm->flags);
} else {
udf_debug("Unknown ident: %s\n",
@@ -1451,7 +1564,7 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
map->s_volumeseqnum = le16_to_cpu(upm2->volSeqNum);
map->s_partition_num = le16_to_cpu(upm2->partitionNum);
}
- udf_debug("Partition (%d:%d) type %d on volume %d\n",
+ udf_debug("Partition (%d:%u) type %u on volume %u\n",
i, map->s_partition_num, type, map->s_volumeseqnum);
}
@@ -1459,153 +1572,250 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
struct long_ad *la = (struct long_ad *)&(lvd->logicalVolContentsUse[0]);
*fileset = lelb_to_cpu(la->extLocation);
- udf_debug("FileSet found in LogicalVolDesc at block=%d, partition=%d\n",
+ udf_debug("FileSet found in LogicalVolDesc at block=%u, partition=%u\n",
fileset->logicalBlockNum,
fileset->partitionReferenceNum);
}
if (lvd->integritySeqExt.extLength)
udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
+ ret = 0;
+ if (!sbi->s_lvid_bh) {
+ /* We can't generate unique IDs without a valid LVID */
+ if (sb_rdonly(sb)) {
+ UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
+ } else {
+ udf_warn(sb, "Damaged or missing LVID, forcing "
+ "readonly mount\n");
+ ret = -EACCES;
+ }
+ }
out_bh:
brelse(bh);
return ret;
}
+static bool udf_lvid_valid(struct super_block *sb,
+ struct logicalVolIntegrityDesc *lvid)
+{
+ u32 parts, impuselen;
+
+ parts = le32_to_cpu(lvid->numOfPartitions);
+ impuselen = le32_to_cpu(lvid->lengthOfImpUse);
+ if (parts >= sb->s_blocksize || impuselen >= sb->s_blocksize ||
+ sizeof(struct logicalVolIntegrityDesc) + impuselen +
+ 2 * parts * sizeof(u32) > sb->s_blocksize)
+ return false;
+ return true;
+}
+
/*
- * udf_load_logicalvolint
- *
+ * Find the prevailing Logical Volume Integrity Descriptor.
*/
static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_ad loc)
{
- struct buffer_head *bh = NULL;
+ struct buffer_head *bh, *final_bh;
uint16_t ident;
struct udf_sb_info *sbi = UDF_SB(sb);
struct logicalVolIntegrityDesc *lvid;
+ int indirections = 0;
+
+ while (++indirections <= UDF_MAX_LVID_NESTING) {
+ final_bh = NULL;
+ while (loc.extLength > 0 &&
+ (bh = udf_read_tagged(sb, loc.extLocation,
+ loc.extLocation, &ident))) {
+ if (ident != TAG_IDENT_LVID) {
+ brelse(bh);
+ break;
+ }
- while (loc.extLength > 0 &&
- (bh = udf_read_tagged(sb, loc.extLocation,
- loc.extLocation, &ident)) &&
- ident == TAG_IDENT_LVID) {
- sbi->s_lvid_bh = bh;
- lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
+ brelse(final_bh);
+ final_bh = bh;
+
+ loc.extLength -= sb->s_blocksize;
+ loc.extLocation++;
+ }
- if (lvid->nextIntegrityExt.extLength)
- udf_load_logicalvolint(sb,
- leea_to_cpu(lvid->nextIntegrityExt));
+ if (!final_bh)
+ return;
- if (sbi->s_lvid_bh != bh)
- brelse(bh);
- loc.extLength -= sb->s_blocksize;
- loc.extLocation++;
+ lvid = (struct logicalVolIntegrityDesc *)final_bh->b_data;
+ if (udf_lvid_valid(sb, lvid)) {
+ brelse(sbi->s_lvid_bh);
+ sbi->s_lvid_bh = final_bh;
+ } else {
+ udf_warn(sb, "Corrupted LVID (parts=%u, impuselen=%u), "
+ "ignoring.\n",
+ le32_to_cpu(lvid->numOfPartitions),
+ le32_to_cpu(lvid->lengthOfImpUse));
+ }
+
+ if (lvid->nextIntegrityExt.extLength == 0)
+ return;
+
+ loc = leea_to_cpu(lvid->nextIntegrityExt);
}
- if (sbi->s_lvid_bh != bh)
- brelse(bh);
+
+ udf_warn(sb, "Too many LVID indirections (max %u), ignoring.\n",
+ UDF_MAX_LVID_NESTING);
+ brelse(sbi->s_lvid_bh);
+ sbi->s_lvid_bh = NULL;
}
/*
- * udf_process_sequence
- *
- * PURPOSE
- * Process a main/reserve volume descriptor sequence.
- *
- * PRE-CONDITIONS
- * sb Pointer to _locked_ superblock.
- * block First block of first extent of the sequence.
- * lastblock Lastblock of first extent of the sequence.
+ * Step for reallocation of table of partition descriptor sequence numbers.
+ * Must be power of 2.
+ */
+#define PART_DESC_ALLOC_STEP 32
+
+struct part_desc_seq_scan_data {
+ struct udf_vds_record rec;
+ u32 partnum;
+};
+
+struct desc_seq_scan_data {
+ struct udf_vds_record vds[VDS_POS_LENGTH];
+ unsigned int size_part_descs;
+ unsigned int num_part_descs;
+ struct part_desc_seq_scan_data *part_descs_loc;
+};
+
+static struct udf_vds_record *handle_partition_descriptor(
+ struct buffer_head *bh,
+ struct desc_seq_scan_data *data)
+{
+ struct partitionDesc *desc = (struct partitionDesc *)bh->b_data;
+ int partnum;
+ int i;
+
+ partnum = le16_to_cpu(desc->partitionNumber);
+ for (i = 0; i < data->num_part_descs; i++)
+ if (partnum == data->part_descs_loc[i].partnum)
+ return &(data->part_descs_loc[i].rec);
+ if (data->num_part_descs >= data->size_part_descs) {
+ struct part_desc_seq_scan_data *new_loc;
+ unsigned int new_size = ALIGN(partnum, PART_DESC_ALLOC_STEP);
+
+ new_loc = kcalloc(new_size, sizeof(*new_loc), GFP_KERNEL);
+ if (!new_loc)
+ return ERR_PTR(-ENOMEM);
+ memcpy(new_loc, data->part_descs_loc,
+ data->size_part_descs * sizeof(*new_loc));
+ kfree(data->part_descs_loc);
+ data->part_descs_loc = new_loc;
+ data->size_part_descs = new_size;
+ }
+ return &(data->part_descs_loc[data->num_part_descs++].rec);
+}
+
+
+static struct udf_vds_record *get_volume_descriptor_record(uint16_t ident,
+ struct buffer_head *bh, struct desc_seq_scan_data *data)
+{
+ switch (ident) {
+ case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
+ return &(data->vds[VDS_POS_PRIMARY_VOL_DESC]);
+ case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
+ return &(data->vds[VDS_POS_IMP_USE_VOL_DESC]);
+ case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
+ return &(data->vds[VDS_POS_LOGICAL_VOL_DESC]);
+ case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
+ return &(data->vds[VDS_POS_UNALLOC_SPACE_DESC]);
+ case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
+ return handle_partition_descriptor(bh, data);
+ }
+ return NULL;
+}
+
+/*
+ * Process a main/reserve volume descriptor sequence.
+ * @block First block of first extent of the sequence.
+ * @lastblock Lastblock of first extent of the sequence.
+ * @fileset There we store extent containing root fileset
*
- * HISTORY
- * July 1, 1997 - Andrew E. Mileski
- * Written, tested, and released.
+ * Returns <0 on error, 0 on success. -EAGAIN is special - try next descriptor
+ * sequence
*/
-static noinline int udf_process_sequence(struct super_block *sb, long block,
- long lastblock, struct kernel_lb_addr *fileset)
+static noinline int udf_process_sequence(
+ struct super_block *sb,
+ sector_t block, sector_t lastblock,
+ struct kernel_lb_addr *fileset)
{
struct buffer_head *bh = NULL;
- struct udf_vds_record vds[VDS_POS_LENGTH];
struct udf_vds_record *curr;
struct generic_desc *gd;
struct volDescPtr *vdp;
- int done = 0;
+ bool done = false;
uint32_t vdsn;
uint16_t ident;
- long next_s = 0, next_e = 0;
-
- memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
+ int ret;
+ unsigned int indirections = 0;
+ struct desc_seq_scan_data data;
+ unsigned int i;
+
+ memset(data.vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
+ data.size_part_descs = PART_DESC_ALLOC_STEP;
+ data.num_part_descs = 0;
+ data.part_descs_loc = kcalloc(data.size_part_descs,
+ sizeof(*data.part_descs_loc),
+ GFP_KERNEL);
+ if (!data.part_descs_loc)
+ return -ENOMEM;
/*
* Read the main descriptor sequence and find which descriptors
* are in it.
*/
for (; (!done && block <= lastblock); block++) {
-
bh = udf_read_tagged(sb, block, block, &ident);
- if (!bh) {
- udf_err(sb,
- "Block %llu of volume descriptor sequence is corrupted or we could not read it\n",
- (unsigned long long)block);
- return 1;
- }
+ if (!bh)
+ break;
/* Process each descriptor (ISO 13346 3/8.3-8.4) */
gd = (struct generic_desc *)bh->b_data;
vdsn = le32_to_cpu(gd->volDescSeqNum);
switch (ident) {
- case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
- curr = &vds[VDS_POS_PRIMARY_VOL_DESC];
- if (vdsn >= curr->volDescSeqNum) {
- curr->volDescSeqNum = vdsn;
- curr->block = block;
- }
- break;
case TAG_IDENT_VDP: /* ISO 13346 3/10.3 */
- curr = &vds[VDS_POS_VOL_DESC_PTR];
- if (vdsn >= curr->volDescSeqNum) {
- curr->volDescSeqNum = vdsn;
- curr->block = block;
-
- vdp = (struct volDescPtr *)bh->b_data;
- next_s = le32_to_cpu(
- vdp->nextVolDescSeqExt.extLocation);
- next_e = le32_to_cpu(
- vdp->nextVolDescSeqExt.extLength);
- next_e = next_e >> sb->s_blocksize_bits;
- next_e += next_s;
+ if (++indirections > UDF_MAX_TD_NESTING) {
+ udf_err(sb, "too many Volume Descriptor "
+ "Pointers (max %u supported)\n",
+ UDF_MAX_TD_NESTING);
+ brelse(bh);
+ ret = -EIO;
+ goto out;
}
+
+ vdp = (struct volDescPtr *)bh->b_data;
+ block = le32_to_cpu(vdp->nextVolDescSeqExt.extLocation);
+ lastblock = le32_to_cpu(
+ vdp->nextVolDescSeqExt.extLength) >>
+ sb->s_blocksize_bits;
+ lastblock += block - 1;
+ /* For loop is going to increment 'block' again */
+ block--;
break;
+ case TAG_IDENT_PVD: /* ISO 13346 3/10.1 */
case TAG_IDENT_IUVD: /* ISO 13346 3/10.4 */
- curr = &vds[VDS_POS_IMP_USE_VOL_DESC];
- if (vdsn >= curr->volDescSeqNum) {
- curr->volDescSeqNum = vdsn;
- curr->block = block;
- }
- break;
- case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
- curr = &vds[VDS_POS_PARTITION_DESC];
- if (!curr->block)
- curr->block = block;
- break;
case TAG_IDENT_LVD: /* ISO 13346 3/10.6 */
- curr = &vds[VDS_POS_LOGICAL_VOL_DESC];
- if (vdsn >= curr->volDescSeqNum) {
- curr->volDescSeqNum = vdsn;
- curr->block = block;
- }
- break;
case TAG_IDENT_USD: /* ISO 13346 3/10.8 */
- curr = &vds[VDS_POS_UNALLOC_SPACE_DESC];
+ case TAG_IDENT_PD: /* ISO 13346 3/10.5 */
+ curr = get_volume_descriptor_record(ident, bh, &data);
+ if (IS_ERR(curr)) {
+ brelse(bh);
+ ret = PTR_ERR(curr);
+ goto out;
+ }
+ /* Descriptor we don't care about? */
+ if (!curr)
+ break;
if (vdsn >= curr->volDescSeqNum) {
curr->volDescSeqNum = vdsn;
curr->block = block;
}
break;
case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
- vds[VDS_POS_TERMINATING_DESC].block = block;
- if (next_e) {
- block = next_s;
- lastblock = next_e;
- next_s = next_e = 0;
- } else
- done = 1;
+ done = true;
break;
}
brelse(bh);
@@ -1614,37 +1824,46 @@ static noinline int udf_process_sequence(struct super_block *sb, long block,
* Now read interesting descriptors again and process them
* in a suitable order
*/
- if (!vds[VDS_POS_PRIMARY_VOL_DESC].block) {
+ if (!data.vds[VDS_POS_PRIMARY_VOL_DESC].block) {
udf_err(sb, "Primary Volume Descriptor not found!\n");
- return 1;
+ ret = -EAGAIN;
+ goto out;
}
- if (udf_load_pvoldesc(sb, vds[VDS_POS_PRIMARY_VOL_DESC].block))
- return 1;
-
- if (vds[VDS_POS_LOGICAL_VOL_DESC].block && udf_load_logicalvol(sb,
- vds[VDS_POS_LOGICAL_VOL_DESC].block, fileset))
- return 1;
+ ret = udf_load_pvoldesc(sb, data.vds[VDS_POS_PRIMARY_VOL_DESC].block);
+ if (ret < 0)
+ goto out;
- if (vds[VDS_POS_PARTITION_DESC].block) {
- /*
- * We rescan the whole descriptor sequence to find
- * partition descriptor blocks and process them.
- */
- for (block = vds[VDS_POS_PARTITION_DESC].block;
- block < vds[VDS_POS_TERMINATING_DESC].block;
- block++)
- if (udf_load_partdesc(sb, block))
- return 1;
+ if (data.vds[VDS_POS_LOGICAL_VOL_DESC].block) {
+ ret = udf_load_logicalvol(sb,
+ data.vds[VDS_POS_LOGICAL_VOL_DESC].block,
+ fileset);
+ if (ret < 0)
+ goto out;
}
- return 0;
+ /* Now handle prevailing Partition Descriptors */
+ for (i = 0; i < data.num_part_descs; i++) {
+ ret = udf_load_partdesc(sb, data.part_descs_loc[i].rec.block);
+ if (ret < 0)
+ goto out;
+ }
+ ret = 0;
+out:
+ kfree(data.part_descs_loc);
+ return ret;
}
+/*
+ * Load Volume Descriptor Sequence described by anchor in bh
+ *
+ * Returns <0 on error, 0 on success
+ */
static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
struct kernel_lb_addr *fileset)
{
struct anchorVolDescPtr *anchor;
- long main_s, main_e, reserve_s, reserve_e;
+ sector_t main_s, main_e, reserve_s, reserve_e;
+ int ret;
anchor = (struct anchorVolDescPtr *)bh->b_data;
@@ -1652,28 +1871,36 @@ static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
main_e = main_e >> sb->s_blocksize_bits;
- main_e += main_s;
+ main_e += main_s - 1;
/* Locate the reserve sequence */
reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
reserve_e = reserve_e >> sb->s_blocksize_bits;
- reserve_e += reserve_s;
+ reserve_e += reserve_s - 1;
/* Process the main & reserve sequences */
/* responsible for finding the PartitionDesc(s) */
- if (!udf_process_sequence(sb, main_s, main_e, fileset))
- return 1;
- udf_sb_free_partitions(sb);
- if (!udf_process_sequence(sb, reserve_s, reserve_e, fileset))
- return 1;
+ ret = udf_process_sequence(sb, main_s, main_e, fileset);
+ if (ret != -EAGAIN)
+ return ret;
udf_sb_free_partitions(sb);
- return 0;
+ ret = udf_process_sequence(sb, reserve_s, reserve_e, fileset);
+ if (ret < 0) {
+ udf_sb_free_partitions(sb);
+ /* No sequence was OK, return -EIO */
+ if (ret == -EAGAIN)
+ ret = -EIO;
+ }
+ return ret;
}
/*
* Check whether there is an anchor block in the given block and
* load Volume Descriptor Sequence if so.
+ *
+ * Returns <0 on error, 0 on success, -EAGAIN is special - try next anchor
+ * block
*/
static int udf_check_anchor_block(struct super_block *sb, sector_t block,
struct kernel_lb_addr *fileset)
@@ -1682,36 +1909,38 @@ static int udf_check_anchor_block(struct super_block *sb, sector_t block,
uint16_t ident;
int ret;
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_VARCONV) &&
- udf_fixed_to_variable(block) >=
- sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits)
- return 0;
-
bh = udf_read_tagged(sb, block, block, &ident);
if (!bh)
- return 0;
+ return -EAGAIN;
if (ident != TAG_IDENT_AVDP) {
brelse(bh);
- return 0;
+ return -EAGAIN;
}
ret = udf_load_sequence(sb, bh, fileset);
brelse(bh);
return ret;
}
-/* Search for an anchor volume descriptor pointer */
-static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
- struct kernel_lb_addr *fileset)
+/*
+ * Search for an anchor volume descriptor pointer.
+ *
+ * Returns < 0 on error, 0 on success. -EAGAIN is special - try next set
+ * of anchors.
+ */
+static int udf_scan_anchors(struct super_block *sb, udf_pblk_t *lastblock,
+ struct kernel_lb_addr *fileset)
{
- sector_t last[6];
+ udf_pblk_t last[6];
int i;
struct udf_sb_info *sbi = UDF_SB(sb);
int last_count = 0;
+ int ret;
/* First try user provided anchor */
if (sbi->s_anchor) {
- if (udf_check_anchor_block(sb, sbi->s_anchor, fileset))
- return lastblock;
+ ret = udf_check_anchor_block(sb, sbi->s_anchor, fileset);
+ if (ret != -EAGAIN)
+ return ret;
}
/*
* according to spec, anchor is in either:
@@ -1720,106 +1949,79 @@ static sector_t udf_scan_anchors(struct super_block *sb, sector_t lastblock,
* lastblock
* however, if the disc isn't closed, it could be 512.
*/
- if (udf_check_anchor_block(sb, sbi->s_session + 256, fileset))
- return lastblock;
+ ret = udf_check_anchor_block(sb, sbi->s_session + 256, fileset);
+ if (ret != -EAGAIN)
+ return ret;
/*
* The trouble is which block is the last one. Drives often misreport
* this so we try various possibilities.
*/
- last[last_count++] = lastblock;
- if (lastblock >= 1)
- last[last_count++] = lastblock - 1;
- last[last_count++] = lastblock + 1;
- if (lastblock >= 2)
- last[last_count++] = lastblock - 2;
- if (lastblock >= 150)
- last[last_count++] = lastblock - 150;
- if (lastblock >= 152)
- last[last_count++] = lastblock - 152;
+ last[last_count++] = *lastblock;
+ if (*lastblock >= 1)
+ last[last_count++] = *lastblock - 1;
+ last[last_count++] = *lastblock + 1;
+ if (*lastblock >= 2)
+ last[last_count++] = *lastblock - 2;
+ if (*lastblock >= 150)
+ last[last_count++] = *lastblock - 150;
+ if (*lastblock >= 152)
+ last[last_count++] = *lastblock - 152;
for (i = 0; i < last_count; i++) {
- if (last[i] >= sb->s_bdev->bd_inode->i_size >>
- sb->s_blocksize_bits)
+ if (last[i] >= sb_bdev_nr_blocks(sb))
continue;
- if (udf_check_anchor_block(sb, last[i], fileset))
- return last[i];
+ ret = udf_check_anchor_block(sb, last[i], fileset);
+ if (ret != -EAGAIN) {
+ if (!ret)
+ *lastblock = last[i];
+ return ret;
+ }
if (last[i] < 256)
continue;
- if (udf_check_anchor_block(sb, last[i] - 256, fileset))
- return last[i];
+ ret = udf_check_anchor_block(sb, last[i] - 256, fileset);
+ if (ret != -EAGAIN) {
+ if (!ret)
+ *lastblock = last[i];
+ return ret;
+ }
}
/* Finally try block 512 in case media is open */
- if (udf_check_anchor_block(sb, sbi->s_session + 512, fileset))
- return last[0];
- return 0;
-}
-
-/*
- * Find an anchor volume descriptor and load Volume Descriptor Sequence from
- * area specified by it. The function expects sbi->s_lastblock to be the last
- * block on the media.
- *
- * Return 1 if ok, 0 if not found.
- *
- */
-static int udf_find_anchor(struct super_block *sb,
- struct kernel_lb_addr *fileset)
-{
- sector_t lastblock;
- struct udf_sb_info *sbi = UDF_SB(sb);
-
- lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
- if (lastblock)
- goto out;
-
- /* No anchor found? Try VARCONV conversion of block numbers */
- UDF_SET_FLAG(sb, UDF_FLAG_VARCONV);
- /* Firstly, we try to not convert number of the last block */
- lastblock = udf_scan_anchors(sb,
- udf_variable_to_fixed(sbi->s_last_block),
- fileset);
- if (lastblock)
- goto out;
-
- /* Secondly, we try with converted number of the last block */
- lastblock = udf_scan_anchors(sb, sbi->s_last_block, fileset);
- if (!lastblock) {
- /* VARCONV didn't help. Clear it. */
- UDF_CLEAR_FLAG(sb, UDF_FLAG_VARCONV);
- return 0;
- }
-out:
- sbi->s_last_block = lastblock;
- return 1;
+ return udf_check_anchor_block(sb, sbi->s_session + 512, fileset);
}
/*
* Check Volume Structure Descriptor, find Anchor block and load Volume
- * Descriptor Sequence
+ * Descriptor Sequence.
+ *
+ * Returns < 0 on error, 0 on success. -EAGAIN is special meaning anchor
+ * block was not found.
*/
static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
int silent, struct kernel_lb_addr *fileset)
{
struct udf_sb_info *sbi = UDF_SB(sb);
- loff_t nsr_off;
+ int nsr = 0;
+ int ret;
if (!sb_set_blocksize(sb, uopt->blocksize)) {
if (!silent)
udf_warn(sb, "Bad block size\n");
- return 0;
+ return -EINVAL;
}
sbi->s_last_block = uopt->lastblock;
- if (!uopt->novrs) {
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_NOVRS)) {
/* Check that it is NSR02 compliant */
- nsr_off = udf_check_vsd(sb);
- if (!nsr_off) {
+ nsr = udf_check_vsd(sb);
+ if (!nsr) {
if (!silent)
udf_warn(sb, "No VRS found\n");
- return 0;
+ return -EINVAL;
}
- if (nsr_off == -1)
- udf_debug("Failed to read byte 32768. Assuming open disc. Skipping validity check\n");
+ if (nsr == -1)
+ udf_debug("Failed to read sector at offset %d. "
+ "Assuming open disc. Skipping validity "
+ "check\n", VSD_FIRST_SECTOR_OFFSET);
if (!sbi->s_last_block)
sbi->s_last_block = udf_get_last_block(sb);
} else {
@@ -1828,12 +2030,25 @@ static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
/* Look for anchor block and load Volume Descriptor Sequence */
sbi->s_anchor = uopt->anchor;
- if (!udf_find_anchor(sb, fileset)) {
- if (!silent)
+ ret = udf_scan_anchors(sb, &sbi->s_last_block, fileset);
+ if (ret < 0) {
+ if (!silent && ret == -EAGAIN)
udf_warn(sb, "No anchor found\n");
- return 0;
+ return ret;
}
- return 1;
+ return 0;
+}
+
+static void udf_finalize_lvid(struct logicalVolIntegrityDesc *lvid)
+{
+ struct timespec64 ts;
+
+ ktime_get_real_ts64(&ts);
+ udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
+ lvid->descTag.descCRC = cpu_to_le16(
+ crc_itu_t(0, (char *)lvid + sizeof(struct tag),
+ le16_to_cpu(lvid->descTag.descCRCLength)));
+ lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
}
static void udf_open_lvid(struct super_block *sb)
@@ -1845,22 +2060,20 @@ static void udf_open_lvid(struct super_block *sb)
if (!bh)
return;
-
- mutex_lock(&sbi->s_alloc_mutex);
lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
- lvidiu = udf_sb_lvidiu(sbi);
+ lvidiu = udf_sb_lvidiu(sb);
+ if (!lvidiu)
+ return;
+ mutex_lock(&sbi->s_alloc_mutex);
lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
- udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
- CURRENT_TIME);
- lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
-
- lvid->descTag.descCRC = cpu_to_le16(
- crc_itu_t(0, (char *)lvid + sizeof(struct tag),
- le16_to_cpu(lvid->descTag.descCRCLength)));
+ if (le32_to_cpu(lvid->integrityType) == LVID_INTEGRITY_TYPE_CLOSE)
+ lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
+ else
+ UDF_SET_FLAG(sb, UDF_FLAG_INCONSISTENT);
- lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
+ udf_finalize_lvid(lvid);
mark_buffer_dirty(bh);
sbi->s_lvid_dirty = 0;
mutex_unlock(&sbi->s_alloc_mutex);
@@ -1877,32 +2090,30 @@ static void udf_close_lvid(struct super_block *sb)
if (!bh)
return;
+ lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
+ lvidiu = udf_sb_lvidiu(sb);
+ if (!lvidiu)
+ return;
mutex_lock(&sbi->s_alloc_mutex);
- lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
- lvidiu = udf_sb_lvidiu(sbi);
lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
- udf_time_to_disk_stamp(&lvid->recordingDateAndTime, CURRENT_TIME);
if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
lvidiu->minUDFReadRev = cpu_to_le16(sbi->s_udfrev);
if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFWriteRev))
lvidiu->minUDFWriteRev = cpu_to_le16(sbi->s_udfrev);
- lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
-
- lvid->descTag.descCRC = cpu_to_le16(
- crc_itu_t(0, (char *)lvid + sizeof(struct tag),
- le16_to_cpu(lvid->descTag.descCRCLength)));
+ if (!UDF_QUERY_FLAG(sb, UDF_FLAG_INCONSISTENT))
+ lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
- lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
/*
* We set buffer uptodate unconditionally here to avoid spurious
* warnings from mark_buffer_dirty() when previous EIO has marked
* the buffer as !uptodate
*/
set_buffer_uptodate(bh);
+ udf_finalize_lvid(lvid);
mark_buffer_dirty(bh);
sbi->s_lvid_dirty = 0;
mutex_unlock(&sbi->s_alloc_mutex);
@@ -1931,28 +2142,23 @@ u64 lvid_get_unique_id(struct super_block *sb)
if (!(++uniqueID & 0xFFFFFFFF))
uniqueID += 16;
lvhd->uniqueID = cpu_to_le64(uniqueID);
+ udf_updated_lvid(sb);
mutex_unlock(&sbi->s_alloc_mutex);
- mark_buffer_dirty(bh);
return ret;
}
-static int udf_fill_super(struct super_block *sb, void *options, int silent)
+static int udf_fill_super(struct super_block *sb, struct fs_context *fc)
{
- int ret;
+ int ret = -EINVAL;
struct inode *inode = NULL;
- struct udf_options uopt;
+ struct udf_options *uopt = fc->fs_private;
struct kernel_lb_addr rootdir, fileset;
struct udf_sb_info *sbi;
+ bool lvid_open = false;
+ int silent = fc->sb_flags & SB_SILENT;
- uopt.flags = (1 << UDF_FLAG_USE_AD_IN_ICB) | (1 << UDF_FLAG_STRICT);
- uopt.uid = INVALID_UID;
- uopt.gid = INVALID_GID;
- uopt.umask = 0;
- uopt.fmode = UDF_INVALID_MODE;
- uopt.dmode = UDF_INVALID_MODE;
-
- sbi = kzalloc(sizeof(struct udf_sb_info), GFP_KERNEL);
+ sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
@@ -1960,42 +2166,23 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
mutex_init(&sbi->s_alloc_mutex);
- if (!udf_parse_options((char *)options, &uopt, false))
- goto error_out;
-
- if (uopt.flags & (1 << UDF_FLAG_UTF8) &&
- uopt.flags & (1 << UDF_FLAG_NLS_MAP)) {
- udf_err(sb, "utf8 cannot be combined with iocharset\n");
- goto error_out;
- }
-#ifdef CONFIG_UDF_NLS
- if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
- uopt.nls_map = load_nls_default();
- if (!uopt.nls_map)
- uopt.flags &= ~(1 << UDF_FLAG_NLS_MAP);
- else
- udf_debug("Using default NLS map\n");
- }
-#endif
- if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
- uopt.flags |= (1 << UDF_FLAG_UTF8);
-
fileset.logicalBlockNum = 0xFFFFFFFF;
fileset.partitionReferenceNum = 0xFFFF;
- sbi->s_flags = uopt.flags;
- sbi->s_uid = uopt.uid;
- sbi->s_gid = uopt.gid;
- sbi->s_umask = uopt.umask;
- sbi->s_fmode = uopt.fmode;
- sbi->s_dmode = uopt.dmode;
- sbi->s_nls_map = uopt.nls_map;
+ sbi->s_flags = uopt->flags;
+ sbi->s_uid = uopt->uid;
+ sbi->s_gid = uopt->gid;
+ sbi->s_umask = uopt->umask;
+ sbi->s_fmode = uopt->fmode;
+ sbi->s_dmode = uopt->dmode;
+ sbi->s_nls_map = uopt->nls_map;
+ uopt->nls_map = NULL;
rwlock_init(&sbi->s_cred_lock);
- if (uopt.session == 0xFFFFFFFF)
+ if (uopt->session == 0xFFFFFFFF)
sbi->s_session = udf_get_last_session(sb);
else
- sbi->s_session = uopt.session;
+ sbi->s_session = uopt->session;
udf_debug("Multi-session=%d\n", sbi->s_session);
@@ -2006,43 +2193,66 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
sb->s_magic = UDF_SUPER_MAGIC;
sb->s_time_gran = 1000;
- if (uopt.flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
- ret = udf_load_vrs(sb, &uopt, silent, &fileset);
+ if (uopt->flags & (1 << UDF_FLAG_BLOCKSIZE_SET)) {
+ ret = udf_load_vrs(sb, uopt, silent, &fileset);
} else {
- uopt.blocksize = bdev_logical_block_size(sb->s_bdev);
- ret = udf_load_vrs(sb, &uopt, silent, &fileset);
- if (!ret && uopt.blocksize != UDF_DEFAULT_BLOCKSIZE) {
- if (!silent)
- pr_notice("Rescanning with blocksize %d\n",
- UDF_DEFAULT_BLOCKSIZE);
- brelse(sbi->s_lvid_bh);
- sbi->s_lvid_bh = NULL;
- uopt.blocksize = UDF_DEFAULT_BLOCKSIZE;
- ret = udf_load_vrs(sb, &uopt, silent, &fileset);
+ uopt->blocksize = bdev_logical_block_size(sb->s_bdev);
+ while (uopt->blocksize <= 4096) {
+ ret = udf_load_vrs(sb, uopt, silent, &fileset);
+ if (ret < 0) {
+ if (!silent && ret != -EACCES) {
+ pr_notice("Scanning with blocksize %u failed\n",
+ uopt->blocksize);
+ }
+ brelse(sbi->s_lvid_bh);
+ sbi->s_lvid_bh = NULL;
+ /*
+ * EACCES is special - we want to propagate to
+ * upper layers that we cannot handle RW mount.
+ */
+ if (ret == -EACCES)
+ break;
+ } else
+ break;
+
+ uopt->blocksize <<= 1;
}
}
- if (!ret) {
- udf_warn(sb, "No partition found (1)\n");
+ if (ret < 0) {
+ if (ret == -EAGAIN) {
+ udf_warn(sb, "No partition found (1)\n");
+ ret = -EINVAL;
+ }
goto error_out;
}
- udf_debug("Lastblock=%d\n", sbi->s_last_block);
+ udf_debug("Lastblock=%u\n", sbi->s_last_block);
if (sbi->s_lvid_bh) {
struct logicalVolIntegrityDescImpUse *lvidiu =
- udf_sb_lvidiu(sbi);
- uint16_t minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
- uint16_t minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
- /* uint16_t maxUDFWriteRev =
- le16_to_cpu(lvidiu->maxUDFWriteRev); */
+ udf_sb_lvidiu(sb);
+ uint16_t minUDFReadRev;
+ uint16_t minUDFWriteRev;
+ if (!lvidiu) {
+ ret = -EINVAL;
+ goto error_out;
+ }
+ minUDFReadRev = le16_to_cpu(lvidiu->minUDFReadRev);
+ minUDFWriteRev = le16_to_cpu(lvidiu->minUDFWriteRev);
if (minUDFReadRev > UDF_MAX_READ_VERSION) {
udf_err(sb, "minUDFReadRev=%x (max is %x)\n",
- le16_to_cpu(lvidiu->minUDFReadRev),
+ minUDFReadRev,
UDF_MAX_READ_VERSION);
+ ret = -EINVAL;
goto error_out;
- } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION)
- sb->s_flags |= MS_RDONLY;
+ } else if (minUDFWriteRev > UDF_MAX_WRITE_VERSION) {
+ if (!sb_rdonly(sb)) {
+ ret = -EACCES;
+ goto error_out;
+ }
+ UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
+ }
sbi->s_udfrev = minUDFWriteRev;
@@ -2054,16 +2264,21 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
if (!sbi->s_partitions) {
udf_warn(sb, "No partition found (2)\n");
+ ret = -EINVAL;
goto error_out;
}
if (sbi->s_partmaps[sbi->s_partition].s_partition_flags &
UDF_PART_FLAG_READ_ONLY) {
- pr_notice("Partition marked readonly; forcing readonly mount\n");
- sb->s_flags |= MS_RDONLY;
+ if (!sb_rdonly(sb)) {
+ ret = -EACCES;
+ goto error_out;
+ }
+ UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
}
- if (udf_find_fileset(sb, &fileset, &rootdir)) {
+ ret = udf_find_fileset(sb, &fileset, &rootdir);
+ if (ret < 0) {
udf_warn(sb, "No fileset found\n");
goto error_out;
}
@@ -2076,16 +2291,19 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
le16_to_cpu(ts.year), ts.month, ts.day,
ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
}
- if (!(sb->s_flags & MS_RDONLY))
+ if (!sb_rdonly(sb)) {
udf_open_lvid(sb);
+ lvid_open = true;
+ }
/* Assign the root inode */
/* assign inodes by physical block number */
/* perhaps it's not extensible enough, but for now ... */
inode = udf_iget(sb, &rootdir);
- if (!inode) {
- udf_err(sb, "Error in udf_iget, block=%d, partition=%d\n",
+ if (IS_ERR(inode)) {
+ udf_err(sb, "Error in udf_iget, block=%u, partition=%u\n",
rootdir.logicalBlockNum, rootdir.partitionReferenceNum);
+ ret = PTR_ERR(inode);
goto error_out;
}
@@ -2093,27 +2311,24 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
sb->s_root = d_make_root(inode);
if (!sb->s_root) {
udf_err(sb, "Couldn't allocate root dentry\n");
+ ret = -ENOMEM;
goto error_out;
}
- sb->s_maxbytes = MAX_LFS_FILESIZE;
+ sb->s_maxbytes = UDF_MAX_FILESIZE;
sb->s_max_links = UDF_MAX_LINKS;
return 0;
error_out:
- if (sbi->s_vat_inode)
- iput(sbi->s_vat_inode);
-#ifdef CONFIG_UDF_NLS
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
- unload_nls(sbi->s_nls_map);
-#endif
- if (!(sb->s_flags & MS_RDONLY))
+ iput(sbi->s_vat_inode);
+ unload_nls(uopt->nls_map);
+ if (lvid_open)
udf_close_lvid(sb);
brelse(sbi->s_lvid_bh);
udf_sb_free_partitions(sb);
kfree(sbi);
sb->s_fs_info = NULL;
- return -EINVAL;
+ return ret;
}
void _udf_err(struct super_block *sb, const char *function,
@@ -2154,16 +2369,13 @@ static void udf_put_super(struct super_block *sb)
sbi = UDF_SB(sb);
- if (sbi->s_vat_inode)
- iput(sbi->s_vat_inode);
-#ifdef CONFIG_UDF_NLS
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
- unload_nls(sbi->s_nls_map);
-#endif
- if (!(sb->s_flags & MS_RDONLY))
+ iput(sbi->s_vat_inode);
+ unload_nls(sbi->s_nls_map);
+ if (!sb_rdonly(sb))
udf_close_lvid(sb);
brelse(sbi->s_lvid_bh);
udf_sb_free_partitions(sb);
+ mutex_destroy(&sbi->s_alloc_mutex);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
}
@@ -2174,11 +2386,17 @@ static int udf_sync_fs(struct super_block *sb, int wait)
mutex_lock(&sbi->s_alloc_mutex);
if (sbi->s_lvid_dirty) {
+ struct buffer_head *bh = sbi->s_lvid_bh;
+ struct logicalVolIntegrityDesc *lvid;
+
+ lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
+ udf_finalize_lvid(lvid);
+
/*
* Blockdevice will be synced later so we don't have to submit
* the buffer for IO
*/
- mark_buffer_dirty(sbi->s_lvid_bh);
+ mark_buffer_dirty(bh);
sbi->s_lvid_dirty = 0;
}
mutex_unlock(&sbi->s_alloc_mutex);
@@ -2193,23 +2411,22 @@ static int udf_statfs(struct dentry *dentry, struct kstatfs *buf)
struct logicalVolIntegrityDescImpUse *lvidiu;
u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
- if (sbi->s_lvid_bh != NULL)
- lvidiu = udf_sb_lvidiu(sbi);
- else
- lvidiu = NULL;
-
+ lvidiu = udf_sb_lvidiu(sb);
buf->f_type = UDF_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = sbi->s_partmaps[sbi->s_partition].s_partition_len;
buf->f_bfree = udf_count_free(sb);
buf->f_bavail = buf->f_bfree;
+ /*
+ * Let's pretend each free block is also a free 'inode' since UDF does
+ * not have separate preallocated table of inodes.
+ */
buf->f_files = (lvidiu != NULL ? (le32_to_cpu(lvidiu->numFiles) +
le32_to_cpu(lvidiu->numDirs)) : 0)
+ buf->f_bfree;
buf->f_ffree = buf->f_bfree;
- buf->f_namelen = UDF_NAME_LEN - 2;
- buf->f_fsid.val[0] = (u32)id;
- buf->f_fsid.val[1] = (u32)(id >> 32);
+ buf->f_namelen = UDF_NAME_LEN;
+ buf->f_fsid = u64_to_fsid(id);
return 0;
}
@@ -2220,7 +2437,7 @@ static unsigned int udf_count_free_bitmap(struct super_block *sb,
struct buffer_head *bh = NULL;
unsigned int accum = 0;
int index;
- int block = 0, newblock;
+ udf_pblk_t block = 0, newblock;
struct kernel_lb_addr loc;
uint32_t bytes;
uint8_t *ptr;
@@ -2253,7 +2470,7 @@ static unsigned int udf_count_free_bitmap(struct super_block *sb,
if (bytes) {
brelse(bh);
newblock = udf_get_lb_pblock(sb, &loc, ++block);
- bh = udf_tread(sb, newblock);
+ bh = sb_bread(sb, newblock);
if (!bh) {
udf_debug("read failed\n");
goto out;
@@ -2273,15 +2490,15 @@ static unsigned int udf_count_free_table(struct super_block *sb,
unsigned int accum = 0;
uint32_t elen;
struct kernel_lb_addr eloc;
- int8_t etype;
struct extent_position epos;
+ int8_t etype;
mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
epos.block = UDF_I(table)->i_location;
epos.offset = sizeof(struct unallocSpaceEntry);
epos.bh = NULL;
- while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
+ while (udf_next_aext(table, &epos, &eloc, &elen, &etype, 1) > 0)
accum += (elen >> table->i_sb->s_blocksize_bits);
brelse(epos.bh);
@@ -2293,17 +2510,29 @@ static unsigned int udf_count_free_table(struct super_block *sb,
static unsigned int udf_count_free(struct super_block *sb)
{
unsigned int accum = 0;
- struct udf_sb_info *sbi;
+ struct udf_sb_info *sbi = UDF_SB(sb);
struct udf_part_map *map;
+ unsigned int part = sbi->s_partition;
+ int ptype = sbi->s_partmaps[part].s_partition_type;
+
+ if (ptype == UDF_METADATA_MAP25) {
+ part = sbi->s_partmaps[part].s_type_specific.s_metadata.
+ s_phys_partition_ref;
+ } else if (ptype == UDF_VIRTUAL_MAP15 || ptype == UDF_VIRTUAL_MAP20) {
+ /*
+ * Filesystems with VAT are append-only and we cannot write to
+ * them. Let's just report 0 here.
+ */
+ return 0;
+ }
- sbi = UDF_SB(sb);
if (sbi->s_lvid_bh) {
struct logicalVolIntegrityDesc *lvid =
(struct logicalVolIntegrityDesc *)
sbi->s_lvid_bh->b_data;
- if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
+ if (le32_to_cpu(lvid->numOfPartitions) > part) {
accum = le32_to_cpu(
- lvid->freeSpaceTable[sbi->s_partition]);
+ lvid->freeSpaceTable[part]);
if (accum == 0xFFFFFFFF)
accum = 0;
}
@@ -2312,15 +2541,11 @@ static unsigned int udf_count_free(struct super_block *sb)
if (accum)
return accum;
- map = &sbi->s_partmaps[sbi->s_partition];
+ map = &sbi->s_partmaps[part];
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
accum += udf_count_free_bitmap(sb,
map->s_uspace.s_bitmap);
}
- if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
- accum += udf_count_free_bitmap(sb,
- map->s_fspace.s_bitmap);
- }
if (accum)
return accum;
@@ -2328,10 +2553,11 @@ static unsigned int udf_count_free(struct super_block *sb)
accum += udf_count_free_table(sb,
map->s_uspace.s_table);
}
- if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
- accum += udf_count_free_table(sb,
- map->s_fspace.s_table);
- }
-
return accum;
}
+
+MODULE_AUTHOR("Ben Fennema");
+MODULE_DESCRIPTION("Universal Disk Format Filesystem");
+MODULE_LICENSE("GPL");
+module_init(init_udf_fs)
+module_exit(exit_udf_fs)
diff --git a/fs/udf/symlink.c b/fs/udf/symlink.c
index d7c6dbe4194b..fe03745d09b1 100644
--- a/fs/udf/symlink.c
+++ b/fs/udf/symlink.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* symlink.c
*
@@ -5,11 +6,6 @@
* Symlink handling routines for the OSTA-UDF(tm) filesystem.
*
* COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
- *
* (C) 1998-2001 Ben Fennema
* (C) 1999 Stelias Computing Inc
*
@@ -20,106 +16,156 @@
*/
#include "udfdecl.h"
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/stat.h>
#include <linux/pagemap.h>
-#include <linux/buffer_head.h>
#include "udf_i.h"
-static void udf_pc_to_char(struct super_block *sb, unsigned char *from,
- int fromlen, unsigned char *to)
+static int udf_pc_to_char(struct super_block *sb, unsigned char *from,
+ int fromlen, unsigned char *to, int tolen)
{
struct pathComponent *pc;
int elen = 0;
+ int comp_len;
unsigned char *p = to;
+ /* Reserve one byte for terminating \0 */
+ tolen--;
while (elen < fromlen) {
pc = (struct pathComponent *)(from + elen);
+ elen += sizeof(struct pathComponent);
switch (pc->componentType) {
case 1:
/*
* Symlink points to some place which should be agreed
* upon between originator and receiver of the media. Ignore.
*/
- if (pc->lengthComponentIdent > 0)
+ if (pc->lengthComponentIdent > 0) {
+ elen += pc->lengthComponentIdent;
break;
- /* Fall through */
+ }
+ fallthrough;
case 2:
+ if (tolen == 0)
+ return -ENAMETOOLONG;
p = to;
*p++ = '/';
+ tolen--;
break;
case 3:
+ if (tolen < 3)
+ return -ENAMETOOLONG;
memcpy(p, "../", 3);
p += 3;
+ tolen -= 3;
break;
case 4:
+ if (tolen < 2)
+ return -ENAMETOOLONG;
memcpy(p, "./", 2);
p += 2;
+ tolen -= 2;
/* that would be . - just ignore */
break;
case 5:
- p += udf_get_filename(sb, pc->componentIdent, p,
- pc->lengthComponentIdent);
+ elen += pc->lengthComponentIdent;
+ if (elen > fromlen)
+ return -EIO;
+ comp_len = udf_get_filename(sb, pc->componentIdent,
+ pc->lengthComponentIdent,
+ p, tolen);
+ if (comp_len < 0)
+ return comp_len;
+
+ p += comp_len;
+ tolen -= comp_len;
+ if (tolen == 0)
+ return -ENAMETOOLONG;
*p++ = '/';
+ tolen--;
break;
}
- elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
}
if (p > to + 1)
p[-1] = '\0';
else
p[0] = '\0';
+ return 0;
}
-static int udf_symlink_filler(struct file *file, struct page *page)
+static int udf_symlink_filler(struct file *file, struct folio *folio)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = folio->mapping->host;
struct buffer_head *bh = NULL;
unsigned char *symlink;
- int err = -EIO;
- unsigned char *p = kmap(page);
- struct udf_inode_info *iinfo;
- uint32_t pos;
+ int err = 0;
+ unsigned char *p = folio_address(folio);
+ struct udf_inode_info *iinfo = UDF_I(inode);
- iinfo = UDF_I(inode);
- pos = udf_block_map(inode, 0);
+ /* We don't support symlinks longer than one block */
+ if (inode->i_size > inode->i_sb->s_blocksize) {
+ err = -ENAMETOOLONG;
+ goto out;
+ }
- down_read(&iinfo->i_data_sem);
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
- symlink = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
+ symlink = iinfo->i_data + iinfo->i_lenEAttr;
} else {
- bh = sb_bread(inode->i_sb, pos);
-
- if (!bh)
+ bh = udf_bread(inode, 0, 0, &err);
+ if (!bh) {
+ if (!err)
+ err = -EFSCORRUPTED;
goto out;
-
+ }
symlink = bh->b_data;
}
- udf_pc_to_char(inode->i_sb, symlink, inode->i_size, p);
+ err = udf_pc_to_char(inode->i_sb, symlink, inode->i_size, p, PAGE_SIZE);
brelse(bh);
-
- up_read(&iinfo->i_data_sem);
- SetPageUptodate(page);
- kunmap(page);
- unlock_page(page);
- return 0;
-
out:
- up_read(&iinfo->i_data_sem);
- SetPageError(page);
- kunmap(page);
- unlock_page(page);
+ folio_end_read(folio, err == 0);
return err;
}
+static int udf_symlink_getattr(struct mnt_idmap *idmap,
+ const struct path *path, struct kstat *stat,
+ u32 request_mask, unsigned int flags)
+{
+ struct dentry *dentry = path->dentry;
+ struct inode *inode = d_backing_inode(dentry);
+ struct folio *folio;
+
+ generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
+ folio = read_mapping_folio(inode->i_mapping, 0, NULL);
+ if (IS_ERR(folio))
+ return PTR_ERR(folio);
+ /*
+ * UDF uses non-trivial encoding of symlinks so i_size does not match
+ * number of characters reported by readlink(2) which apparently some
+ * applications expect. Also POSIX says that "The value returned in the
+ * st_size field shall be the length of the contents of the symbolic
+ * link, and shall not count a trailing null if one is present." So
+ * let's report the length of string returned by readlink(2) for
+ * st_size.
+ */
+ stat->size = strlen(folio_address(folio));
+ folio_put(folio);
+
+ return 0;
+}
+
/*
* symlinks can't do much...
*/
const struct address_space_operations udf_symlink_aops = {
- .readpage = udf_symlink_filler,
+ .read_folio = udf_symlink_filler,
+};
+
+const struct inode_operations udf_symlink_inode_operations = {
+ .get_link = page_get_link,
+ .getattr = udf_symlink_getattr,
};
diff --git a/fs/udf/truncate.c b/fs/udf/truncate.c
index 8a9657d7f7c6..b4071c9cf8c9 100644
--- a/fs/udf/truncate.c
+++ b/fs/udf/truncate.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* truncate.c
*
@@ -5,11 +6,6 @@
* Truncate handling routines for the OSTA-UDF(tm) filesystem.
*
* COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
- *
* (C) 1999-2004 Ben Fennema
* (C) 1999 Stelias Computing Inc
*
@@ -22,7 +18,6 @@
#include "udfdecl.h"
#include <linux/fs.h>
#include <linux/mm.h>
-#include <linux/buffer_head.h>
#include "udf_i.h"
#include "udf_sb.h"
@@ -49,7 +44,7 @@ static void extent_trunc(struct inode *inode, struct extent_position *epos,
if (elen != nelen) {
udf_write_aext(inode, epos, &neloc, nelen, 0);
- if (last_block - first_block > 0) {
+ if (last_block > first_block) {
if (etype == (EXT_RECORDED_ALLOCATED >> 30))
mark_inode_dirty(inode);
@@ -74,6 +69,7 @@ void udf_truncate_tail_extent(struct inode *inode)
int8_t etype = -1, netype;
int adsize;
struct udf_inode_info *iinfo = UDF_I(inode);
+ int ret;
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB ||
inode->i_size == iinfo->i_lenExtents)
@@ -90,7 +86,10 @@ void udf_truncate_tail_extent(struct inode *inode)
BUG();
/* Find the last extent in the file */
- while ((netype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
+ while (1) {
+ ret = udf_next_aext(inode, &epos, &eloc, &elen, &netype, 1);
+ if (ret <= 0)
+ break;
etype = netype;
lbcount += elen;
if (lbcount > inode->i_size) {
@@ -106,7 +105,8 @@ void udf_truncate_tail_extent(struct inode *inode)
epos.offset -= adsize;
extent_trunc(inode, &epos, &eloc, etype, elen, nelen);
epos.offset += adsize;
- if (udf_next_aext(inode, &epos, &eloc, &elen, 1) != -1)
+ if (udf_next_aext(inode, &epos, &eloc, &elen,
+ &netype, 1) > 0)
udf_err(inode->i_sb,
"Extent after EOF in inode %u\n",
(unsigned)inode->i_ino);
@@ -115,66 +115,60 @@ void udf_truncate_tail_extent(struct inode *inode)
}
/* This inode entry is in-memory only and thus we don't have to mark
* the inode dirty */
- iinfo->i_lenExtents = inode->i_size;
+ if (ret >= 0)
+ iinfo->i_lenExtents = inode->i_size;
brelse(epos.bh);
}
void udf_discard_prealloc(struct inode *inode)
{
- struct extent_position epos = { NULL, 0, {0, 0} };
+ struct extent_position epos = {};
+ struct extent_position prev_epos = {};
struct kernel_lb_addr eloc;
uint32_t elen;
uint64_t lbcount = 0;
- int8_t etype = -1, netype;
- int adsize;
+ int8_t etype = -1;
struct udf_inode_info *iinfo = UDF_I(inode);
+ int bsize = i_blocksize(inode);
+ int8_t tmpetype = -1;
+ int ret;
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB ||
- inode->i_size == iinfo->i_lenExtents)
+ ALIGN(inode->i_size, bsize) == ALIGN(iinfo->i_lenExtents, bsize))
return;
- if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
- adsize = sizeof(struct short_ad);
- else if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_LONG)
- adsize = sizeof(struct long_ad);
- else
- adsize = 0;
-
epos.block = iinfo->i_location;
/* Find the last extent in the file */
- while ((netype = udf_next_aext(inode, &epos, &eloc, &elen, 1)) != -1) {
- etype = netype;
+ while (1) {
+ ret = udf_next_aext(inode, &epos, &eloc, &elen, &tmpetype, 0);
+ if (ret < 0)
+ goto out;
+ if (ret == 0)
+ break;
+ brelse(prev_epos.bh);
+ prev_epos = epos;
+ if (prev_epos.bh)
+ get_bh(prev_epos.bh);
+
+ ret = udf_next_aext(inode, &epos, &eloc, &elen, &etype, 1);
+ if (ret < 0)
+ goto out;
lbcount += elen;
}
+
if (etype == (EXT_NOT_RECORDED_ALLOCATED >> 30)) {
- epos.offset -= adsize;
lbcount -= elen;
- extent_trunc(inode, &epos, &eloc, etype, elen, 0);
- if (!epos.bh) {
- iinfo->i_lenAlloc =
- epos.offset -
- udf_file_entry_alloc_offset(inode);
- mark_inode_dirty(inode);
- } else {
- struct allocExtDesc *aed =
- (struct allocExtDesc *)(epos.bh->b_data);
- aed->lengthAllocDescs =
- cpu_to_le32(epos.offset -
- sizeof(struct allocExtDesc));
- if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
- UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
- udf_update_tag(epos.bh->b_data, epos.offset);
- else
- udf_update_tag(epos.bh->b_data,
- sizeof(struct allocExtDesc));
- mark_buffer_dirty_inode(epos.bh, inode);
- }
+ udf_delete_aext(inode, prev_epos);
+ udf_free_blocks(inode->i_sb, inode, &eloc, 0,
+ DIV_ROUND_UP(elen, bsize));
}
/* This inode entry is in-memory only and thus we don't have to mark
* the inode dirty */
iinfo->i_lenExtents = lbcount;
+out:
brelse(epos.bh);
+ brelse(prev_epos.bh);
}
static void udf_update_alloc_ext_desc(struct inode *inode,
@@ -200,7 +194,7 @@ static void udf_update_alloc_ext_desc(struct inode *inode,
* for making file shorter. For making file longer, udf_extend_file() has to
* be used.
*/
-void udf_truncate_extents(struct inode *inode)
+int udf_truncate_extents(struct inode *inode)
{
struct extent_position epos;
struct kernel_lb_addr eloc, neloc = {};
@@ -211,6 +205,7 @@ void udf_truncate_extents(struct inode *inode)
loff_t byte_offset;
int adsize;
struct udf_inode_info *iinfo = UDF_I(inode);
+ int ret = 0;
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
adsize = sizeof(struct short_ad);
@@ -219,13 +214,15 @@ void udf_truncate_extents(struct inode *inode)
else
BUG();
- etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
+ ret = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset, &etype);
+ if (ret < 0)
+ return ret;
byte_offset = (offset << sb->s_blocksize_bits) +
(inode->i_size & (sb->s_blocksize - 1));
- if (etype == -1) {
+ if (ret == 0) {
/* We should extend the file? */
WARN_ON(byte_offset);
- return;
+ return 0;
}
epos.offset -= adsize;
extent_trunc(inode, &epos, &eloc, etype, elen, byte_offset);
@@ -240,9 +237,9 @@ void udf_truncate_extents(struct inode *inode)
else
lenalloc -= sizeof(struct allocExtDesc);
- while ((etype = udf_current_aext(inode, &epos, &eloc,
- &elen, 0)) != -1) {
- if (etype == (EXT_NEXT_EXTENT_ALLOCDECS >> 30)) {
+ while ((ret = udf_current_aext(inode, &epos, &eloc,
+ &elen, &etype, 0)) > 0) {
+ if (etype == (EXT_NEXT_EXTENT_ALLOCDESCS >> 30)) {
udf_write_aext(inode, &epos, &neloc, nelen, 0);
if (indirect_ext_len) {
/* We managed to free all extents in the
@@ -259,8 +256,11 @@ void udf_truncate_extents(struct inode *inode)
brelse(epos.bh);
epos.offset = sizeof(struct allocExtDesc);
epos.block = eloc;
- epos.bh = udf_tread(sb,
+ epos.bh = sb_bread(sb,
udf_get_lb_pblock(sb, &eloc, 0));
+ /* Error reading indirect block? */
+ if (!epos.bh)
+ return -EIO;
if (elen)
indirect_ext_len =
(elen + sb->s_blocksize - 1) >>
@@ -273,6 +273,11 @@ void udf_truncate_extents(struct inode *inode)
}
}
+ if (ret < 0) {
+ brelse(epos.bh);
+ return ret;
+ }
+
if (indirect_ext_len) {
BUG_ON(!epos.bh);
udf_free_blocks(sb, NULL, &epos.block, 0, indirect_ext_len);
@@ -284,4 +289,5 @@ void udf_truncate_extents(struct inode *inode)
iinfo->i_lenExtents = inode->i_size;
brelse(epos.bh);
+ return 0;
}
diff --git a/fs/udf/udf_i.h b/fs/udf/udf_i.h
index b5cd8ed2aa12..312b7c9ef10e 100644
--- a/fs/udf/udf_i.h
+++ b/fs/udf/udf_i.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _UDF_I_H
#define _UDF_I_H
@@ -27,7 +28,7 @@ struct udf_ext_cache {
*/
struct udf_inode_info {
- struct timespec i_crtime;
+ struct timespec64 i_crtime;
/* Physical address of inode */
struct kernel_lb_addr i_location;
__u64 i_unique;
@@ -37,16 +38,17 @@ struct udf_inode_info {
__u32 i_next_alloc_block;
__u32 i_next_alloc_goal;
__u32 i_checkpoint;
+ __u32 i_extraPerms;
unsigned i_alloc_type : 3;
unsigned i_efe : 1; /* extendedFileEntry */
unsigned i_use : 1; /* unallocSpaceEntry */
unsigned i_strat4096 : 1;
- unsigned reserved : 26;
- union {
- struct short_ad *i_sad;
- struct long_ad *i_lad;
- __u8 *i_data;
- } i_ext;
+ unsigned i_streamdir : 1;
+ unsigned i_hidden : 1; /* hidden system inode */
+ unsigned reserved : 24;
+ __u8 *i_data;
+ struct kernel_lb_addr i_locStreamdir;
+ __u64 i_lenStreams;
struct rw_semaphore i_data_sem;
struct udf_ext_cache cached_extent;
/* Spinlock for protecting extent cache */
@@ -56,7 +58,7 @@ struct udf_inode_info {
static inline struct udf_inode_info *UDF_I(struct inode *inode)
{
- return list_entry(inode, struct udf_inode_info, vfs_inode);
+ return container_of(inode, struct udf_inode_info, vfs_inode);
}
#endif /* _UDF_I_H) */
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index ed401e94aa8c..08ec8756b948 100644
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -1,13 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_UDF_SB_H
#define __LINUX_UDF_SB_H
#include <linux/mutex.h>
#include <linux/bitops.h>
+#include <linux/magic.h>
-/* Since UDF 2.01 is ISO 13346 based... */
-#define UDF_SUPER_MAGIC 0x15013346
-
-#define UDF_MAX_READ_VERSION 0x0250
+/*
+ * Even UDF 2.6 media should have version <= 0x250 but apparently there are
+ * some broken filesystems with version set to 0x260. Accommodate those.
+ */
+#define UDF_MAX_READ_VERSION 0x0260
#define UDF_MAX_WRITE_VERSION 0x0201
#define UDF_FLAG_USE_EXTENDED_FE 0
@@ -20,23 +23,20 @@
#define UDF_FLAG_STRICT 5
#define UDF_FLAG_UNDELETE 6
#define UDF_FLAG_UNHIDE 7
-#define UDF_FLAG_VARCONV 8
-#define UDF_FLAG_NLS_MAP 9
-#define UDF_FLAG_UTF8 10
+#define UDF_FLAG_NOVRS 8
#define UDF_FLAG_UID_FORGET 11 /* save -1 for uid to disk */
-#define UDF_FLAG_UID_IGNORE 12 /* use sb uid instead of on disk uid */
-#define UDF_FLAG_GID_FORGET 13
-#define UDF_FLAG_GID_IGNORE 14
-#define UDF_FLAG_UID_SET 15
-#define UDF_FLAG_GID_SET 16
-#define UDF_FLAG_SESSION_SET 17
-#define UDF_FLAG_LASTBLOCK_SET 18
-#define UDF_FLAG_BLOCKSIZE_SET 19
+#define UDF_FLAG_GID_FORGET 12
+#define UDF_FLAG_UID_SET 13
+#define UDF_FLAG_GID_SET 14
+#define UDF_FLAG_SESSION_SET 15
+#define UDF_FLAG_LASTBLOCK_SET 16
+#define UDF_FLAG_BLOCKSIZE_SET 17
+#define UDF_FLAG_INCONSISTENT 18
+#define UDF_FLAG_RW_INCOMPAT 19 /* Set when we find RW incompatible
+ * feature */
#define UDF_PART_FLAG_UNALLOC_BITMAP 0x0001
#define UDF_PART_FLAG_UNALLOC_TABLE 0x0002
-#define UDF_PART_FLAG_FREED_BITMAP 0x0004
-#define UDF_PART_FLAG_FREED_TABLE 0x0008
#define UDF_PART_FLAG_READ_ONLY 0x0010
#define UDF_PART_FLAG_WRITE_ONCE 0x0020
#define UDF_PART_FLAG_REWRITABLE 0x0040
@@ -52,17 +52,22 @@
#define UDF_INVALID_MODE ((umode_t)-1)
-#pragma pack(1) /* XXX(hch): Why? This file just defines in-core structures */
-
#define MF_DUPLICATE_MD 0x01
#define MF_MIRROR_FE_LOADED 0x02
+#define EFSCORRUPTED EUCLEAN
+
struct udf_meta_data {
__u32 s_meta_file_loc;
__u32 s_mirror_file_loc;
__u32 s_bitmap_file_loc;
__u32 s_alloc_unit_size;
__u16 s_align_unit_size;
+ /*
+ * Partition Reference Number of the associated physical / sparable
+ * partition
+ */
+ __u16 s_phys_partition_ref;
int s_flags;
struct inode *s_metadata_fe;
struct inode *s_mirror_fe;
@@ -82,7 +87,7 @@ struct udf_virtual_data {
struct udf_bitmap {
__u32 s_extPosition;
int s_nr_groups;
- struct buffer_head *s_block_bitmap[0];
+ struct buffer_head *s_block_bitmap[] __counted_by(s_nr_groups);
};
struct udf_part_map {
@@ -90,10 +95,6 @@ struct udf_part_map {
struct udf_bitmap *s_bitmap;
struct inode *s_table;
} s_uspace;
- union {
- struct udf_bitmap *s_bitmap;
- struct inode *s_table;
- } s_fspace;
__u32 s_partition_root;
__u32 s_partition_len;
__u16 s_partition_type;
@@ -135,7 +136,7 @@ struct udf_sb_info {
rwlock_t s_cred_lock;
/* Root Info */
- struct timespec s_record_time;
+ struct timespec64 s_record_time;
/* Fileset Info */
__u16 s_serial_number;
@@ -162,7 +163,7 @@ static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
return sb->s_fs_info;
}
-struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
+struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
int udf_compute_nr_groups(struct super_block *sb, u32 partition);
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index be7dabbbcb49..d159f20d61e8 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __UDF_DECL_H
#define __UDF_DECL_H
@@ -15,7 +16,6 @@
#include "udfend.h"
#include "udf_i.h"
-#define UDF_PREALLOCATE
#define UDF_DEFAULT_PREALLOC_BLOCKS 8
extern __printf(3, 4) void _udf_err(struct super_block *sb,
@@ -31,26 +31,17 @@ extern __printf(3, 4) void _udf_warn(struct super_block *sb,
#define udf_info(fmt, ...) \
pr_info("INFO " fmt, ##__VA_ARGS__)
-#undef UDFFS_DEBUG
-
-#ifdef UDFFS_DEBUG
-#define udf_debug(fmt, ...) \
- printk(KERN_DEBUG pr_fmt("%s:%d:%s: " fmt), \
- __FILE__, __LINE__, __func__, ##__VA_ARGS__)
-#else
#define udf_debug(fmt, ...) \
- no_printk(fmt, ##__VA_ARGS__)
-#endif
-
-#define udf_fixed_to_variable(x) ( ( ( (x) >> 5 ) * 39 ) + ( (x) & 0x0000001F ) )
-#define udf_variable_to_fixed(x) ( ( ( (x) / 39 ) << 5 ) + ( (x) % 39 ) )
+ pr_debug("%s:%d:%s: " fmt, __FILE__, __LINE__, __func__, ##__VA_ARGS__)
#define UDF_EXTENT_LENGTH_MASK 0x3FFFFFFF
#define UDF_EXTENT_FLAG_MASK 0xC0000000
+#define UDF_INVALID_ID ((uint32_t)-1)
+
#define UDF_NAME_PAD 4
-#define UDF_NAME_LEN 256
-#define UDF_PATH_LEN 1023
+#define UDF_NAME_LEN 254
+#define UDF_NAME_LEN_CS0 255
static inline size_t udf_file_entry_alloc_offset(struct inode *inode)
{
@@ -74,6 +65,8 @@ static inline size_t udf_ext0_offset(struct inode *inode)
/* computes tag checksum */
u8 udf_tag_checksum(const struct tag *t);
+typedef uint32_t udf_pblk_t;
+
struct dentry;
struct inode;
struct task_struct;
@@ -87,14 +80,24 @@ extern const struct inode_operations udf_file_inode_operations;
extern const struct file_operations udf_file_operations;
extern const struct inode_operations udf_symlink_inode_operations;
extern const struct address_space_operations udf_aops;
-extern const struct address_space_operations udf_adinicb_aops;
extern const struct address_space_operations udf_symlink_aops;
-struct udf_fileident_bh {
- struct buffer_head *sbh;
- struct buffer_head *ebh;
- int soffset;
- int eoffset;
+struct udf_fileident_iter {
+ struct inode *dir; /* Directory we are working with */
+ loff_t pos; /* Logical position in a dir */
+ struct buffer_head *bh[2]; /* Buffer containing 'pos' and possibly
+ * next buffer if entry straddles
+ * blocks */
+ struct kernel_lb_addr eloc; /* Start of extent containing 'pos' */
+ uint32_t elen; /* Length of extent containing 'pos' */
+ sector_t loffset; /* Block offset of 'pos' within above
+ * extent */
+ struct extent_position epos; /* Position after the above extent */
+ struct fileIdentDesc fi; /* Copied directory entry */
+ uint8_t *name; /* Pointer to entry name */
+ uint8_t *namebuf; /* Storage for entry name in case
+ * the name is split between two blocks
+ */
};
struct udf_vds_record {
@@ -107,12 +110,6 @@ struct generic_desc {
__le32 volDescSeqNum;
};
-struct ustr {
- uint8_t u_cmpID;
- uint8_t u_name[UDF_NAME_LEN - 2];
- uint8_t u_len;
-};
-
/* super.c */
@@ -131,38 +128,57 @@ struct inode *udf_find_metadata_inode_efe(struct super_block *sb,
u32 meta_file_loc, u32 partition_num);
/* namei.c */
-extern int udf_write_fi(struct inode *inode, struct fileIdentDesc *,
- struct fileIdentDesc *, struct udf_fileident_bh *,
- uint8_t *, uint8_t *);
+static inline unsigned int udf_dir_entry_len(struct fileIdentDesc *cfi)
+{
+ return ALIGN(sizeof(struct fileIdentDesc) +
+ le16_to_cpu(cfi->lengthOfImpUse) + cfi->lengthFileIdent,
+ UDF_NAME_PAD);
+}
/* file.c */
extern long udf_ioctl(struct file *, unsigned int, unsigned long);
+
/* inode.c */
-extern struct inode *udf_iget(struct super_block *, struct kernel_lb_addr *);
+extern struct inode *__udf_iget(struct super_block *, struct kernel_lb_addr *,
+ bool hidden_inode);
+static inline struct inode *udf_iget_special(struct super_block *sb,
+ struct kernel_lb_addr *ino)
+{
+ return __udf_iget(sb, ino, true);
+}
+static inline struct inode *udf_iget(struct super_block *sb,
+ struct kernel_lb_addr *ino)
+{
+ return __udf_iget(sb, ino, false);
+}
extern int udf_expand_file_adinicb(struct inode *);
-extern struct buffer_head *udf_expand_dir_adinicb(struct inode *, int *, int *);
-extern struct buffer_head *udf_bread(struct inode *, int, int, int *);
+extern struct buffer_head *udf_bread(struct inode *inode, udf_pblk_t block,
+ int create, int *err);
extern int udf_setsize(struct inode *, loff_t);
-extern void udf_read_inode(struct inode *);
extern void udf_evict_inode(struct inode *);
extern int udf_write_inode(struct inode *, struct writeback_control *wbc);
-extern long udf_block_map(struct inode *, sector_t);
-extern int8_t inode_bmap(struct inode *, sector_t, struct extent_position *,
- struct kernel_lb_addr *, uint32_t *, sector_t *);
+extern int inode_bmap(struct inode *inode, sector_t block,
+ struct extent_position *pos, struct kernel_lb_addr *eloc,
+ uint32_t *elen, sector_t *offset, int8_t *etype);
+int udf_get_block(struct inode *, sector_t, struct buffer_head *, int);
+extern int udf_setup_indirect_aext(struct inode *inode, udf_pblk_t block,
+ struct extent_position *epos);
+extern int __udf_add_aext(struct inode *inode, struct extent_position *epos,
+ struct kernel_lb_addr *eloc, uint32_t elen, int inc);
extern int udf_add_aext(struct inode *, struct extent_position *,
struct kernel_lb_addr *, uint32_t, int);
extern void udf_write_aext(struct inode *, struct extent_position *,
struct kernel_lb_addr *, uint32_t, int);
-extern int8_t udf_delete_aext(struct inode *, struct extent_position,
- struct kernel_lb_addr, uint32_t);
-extern int8_t udf_next_aext(struct inode *, struct extent_position *,
- struct kernel_lb_addr *, uint32_t *, int);
-extern int8_t udf_current_aext(struct inode *, struct extent_position *,
- struct kernel_lb_addr *, uint32_t *, int);
+extern int8_t udf_delete_aext(struct inode *, struct extent_position);
+extern int udf_next_aext(struct inode *inode, struct extent_position *epos,
+ struct kernel_lb_addr *eloc, uint32_t *elen,
+ int8_t *etype, int inc);
+extern int udf_current_aext(struct inode *inode, struct extent_position *epos,
+ struct kernel_lb_addr *eloc, uint32_t *elen,
+ int8_t *etype, int inc);
+extern void udf_update_extra_perms(struct inode *inode, umode_t mode);
/* misc.c */
-extern struct buffer_head *udf_tgetblk(struct super_block *, int);
-extern struct buffer_head *udf_tread(struct super_block *, int);
extern struct genericFormat *udf_add_extendedattr(struct inode *, uint32_t,
uint32_t, uint8_t);
extern struct genericFormat *udf_get_extendedattr(struct inode *, uint32_t,
@@ -177,7 +193,7 @@ extern void udf_new_tag(char *, uint16_t, uint16_t, uint16_t, uint32_t, int);
/* lowlevel.c */
extern unsigned int udf_get_last_session(struct super_block *);
-extern unsigned long udf_get_last_block(struct super_block *);
+udf_pblk_t udf_get_last_block(struct super_block *);
/* partition.c */
extern uint32_t udf_get_pblock(struct super_block *, uint32_t, uint16_t,
@@ -201,44 +217,44 @@ udf_get_lb_pblock(struct super_block *sb, struct kernel_lb_addr *loc,
}
/* unicode.c */
-extern int udf_get_filename(struct super_block *, uint8_t *, uint8_t *, int);
-extern int udf_put_filename(struct super_block *, const uint8_t *, uint8_t *,
- int);
-extern int udf_build_ustr(struct ustr *, dstring *, int);
-extern int udf_CS0toUTF8(struct ustr *, const struct ustr *);
+extern int udf_get_filename(struct super_block *, const uint8_t *, int,
+ uint8_t *, int);
+extern int udf_put_filename(struct super_block *, const uint8_t *, int,
+ uint8_t *, int);
+extern int udf_dstrCS0toChar(struct super_block *, uint8_t *, int,
+ const uint8_t *, int);
/* ialloc.c */
extern void udf_free_inode(struct inode *);
-extern struct inode *udf_new_inode(struct inode *, umode_t, int *);
+extern struct inode *udf_new_inode(struct inode *, umode_t);
/* truncate.c */
extern void udf_truncate_tail_extent(struct inode *);
extern void udf_discard_prealloc(struct inode *);
-extern void udf_truncate_extents(struct inode *);
+extern int udf_truncate_extents(struct inode *);
/* balloc.c */
extern void udf_free_blocks(struct super_block *, struct inode *,
struct kernel_lb_addr *, uint32_t, uint32_t);
extern int udf_prealloc_blocks(struct super_block *, struct inode *, uint16_t,
uint32_t, uint32_t);
-extern int udf_new_block(struct super_block *, struct inode *, uint16_t,
- uint32_t, int *);
+extern udf_pblk_t udf_new_block(struct super_block *sb, struct inode *inode,
+ uint16_t partition, uint32_t goal, int *err);
/* directory.c */
-extern struct fileIdentDesc *udf_fileident_read(struct inode *, loff_t *,
- struct udf_fileident_bh *,
- struct fileIdentDesc *,
- struct extent_position *,
- struct kernel_lb_addr *, uint32_t *,
- sector_t *);
-extern struct fileIdentDesc *udf_get_fileident(void *buffer, int bufsize,
- int *offset);
+int udf_fiiter_init(struct udf_fileident_iter *iter, struct inode *dir,
+ loff_t pos);
+int udf_fiiter_advance(struct udf_fileident_iter *iter);
+void udf_fiiter_release(struct udf_fileident_iter *iter);
+void udf_fiiter_write_fi(struct udf_fileident_iter *iter, uint8_t *impuse);
+void udf_fiiter_update_elen(struct udf_fileident_iter *iter, uint32_t new_elen);
+int udf_fiiter_append_blk(struct udf_fileident_iter *iter);
extern struct long_ad *udf_get_filelongad(uint8_t *, int, uint32_t *, int);
extern struct short_ad *udf_get_fileshortad(uint8_t *, int, uint32_t *, int);
/* udftime.c */
-extern struct timespec *udf_disk_stamp_to_time(struct timespec *dest,
+extern void udf_disk_stamp_to_time(struct timespec64 *dest,
struct timestamp src);
-extern struct timestamp *udf_time_to_disk_stamp(struct timestamp *dest, struct timespec src);
+extern void udf_time_to_disk_stamp(struct timestamp *dest, struct timespec64 src);
#endif /* __UDF_DECL_H */
diff --git a/fs/udf/udfend.h b/fs/udf/udfend.h
index 6a9f3a9cc428..a4363ac2cfeb 100644
--- a/fs/udf/udfend.h
+++ b/fs/udf/udfend.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __UDF_ENDIAN_H
#define __UDF_ENDIAN_H
diff --git a/fs/udf/udftime.c b/fs/udf/udftime.c
index 1f11483eba6a..78ecc633606f 100644
--- a/fs/udf/udftime.c
+++ b/fs/udf/udftime.c
@@ -1,21 +1,7 @@
+// SPDX-License-Identifier: LGPL-2.0+
/* Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
- Contributed by Paul Eggert (eggert@twinsun.com).
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Contributed by Paul Eggert (eggert@twinsun.com). */
/*
* dgb 10/02/98: ripped this from glibc source to help convert timestamps
@@ -38,58 +24,11 @@
#include <linux/types.h>
#include <linux/kernel.h>
+#include <linux/time.h>
-#define EPOCH_YEAR 1970
-
-#ifndef __isleap
-/* Nonzero if YEAR is a leap year (every 4 years,
- except every 100th isn't, and every 400th is). */
-#define __isleap(year) \
- ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
-#endif
-
-/* How many days come before each month (0-12). */
-static const unsigned short int __mon_yday[2][13] = {
- /* Normal years. */
- {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365},
- /* Leap years. */
- {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366}
-};
-
-#define MAX_YEAR_SECONDS 69
-#define SPD 0x15180 /*3600*24 */
-#define SPY(y, l, s) (SPD * (365 * y + l) + s)
-
-static time_t year_seconds[MAX_YEAR_SECONDS] = {
-/*1970*/ SPY(0, 0, 0), SPY(1, 0, 0), SPY(2, 0, 0), SPY(3, 1, 0),
-/*1974*/ SPY(4, 1, 0), SPY(5, 1, 0), SPY(6, 1, 0), SPY(7, 2, 0),
-/*1978*/ SPY(8, 2, 0), SPY(9, 2, 0), SPY(10, 2, 0), SPY(11, 3, 0),
-/*1982*/ SPY(12, 3, 0), SPY(13, 3, 0), SPY(14, 3, 0), SPY(15, 4, 0),
-/*1986*/ SPY(16, 4, 0), SPY(17, 4, 0), SPY(18, 4, 0), SPY(19, 5, 0),
-/*1990*/ SPY(20, 5, 0), SPY(21, 5, 0), SPY(22, 5, 0), SPY(23, 6, 0),
-/*1994*/ SPY(24, 6, 0), SPY(25, 6, 0), SPY(26, 6, 0), SPY(27, 7, 0),
-/*1998*/ SPY(28, 7, 0), SPY(29, 7, 0), SPY(30, 7, 0), SPY(31, 8, 0),
-/*2002*/ SPY(32, 8, 0), SPY(33, 8, 0), SPY(34, 8, 0), SPY(35, 9, 0),
-/*2006*/ SPY(36, 9, 0), SPY(37, 9, 0), SPY(38, 9, 0), SPY(39, 10, 0),
-/*2010*/ SPY(40, 10, 0), SPY(41, 10, 0), SPY(42, 10, 0), SPY(43, 11, 0),
-/*2014*/ SPY(44, 11, 0), SPY(45, 11, 0), SPY(46, 11, 0), SPY(47, 12, 0),
-/*2018*/ SPY(48, 12, 0), SPY(49, 12, 0), SPY(50, 12, 0), SPY(51, 13, 0),
-/*2022*/ SPY(52, 13, 0), SPY(53, 13, 0), SPY(54, 13, 0), SPY(55, 14, 0),
-/*2026*/ SPY(56, 14, 0), SPY(57, 14, 0), SPY(58, 14, 0), SPY(59, 15, 0),
-/*2030*/ SPY(60, 15, 0), SPY(61, 15, 0), SPY(62, 15, 0), SPY(63, 16, 0),
-/*2034*/ SPY(64, 16, 0), SPY(65, 16, 0), SPY(66, 16, 0), SPY(67, 17, 0),
-/*2038*/ SPY(68, 17, 0)
-};
-
-extern struct timezone sys_tz;
-
-#define SECS_PER_HOUR (60 * 60)
-#define SECS_PER_DAY (SECS_PER_HOUR * 24)
-
-struct timespec *
-udf_disk_stamp_to_time(struct timespec *dest, struct timestamp src)
+void
+udf_disk_stamp_to_time(struct timespec64 *dest, struct timestamp src)
{
- int yday;
u16 typeAndTimezone = le16_to_cpu(src.typeAndTimezone);
u16 year = le16_to_cpu(src.year);
uint8_t type = typeAndTimezone >> 12;
@@ -104,69 +43,47 @@ udf_disk_stamp_to_time(struct timespec *dest, struct timestamp src)
} else
offset = 0;
- if ((year < EPOCH_YEAR) ||
- (year >= EPOCH_YEAR + MAX_YEAR_SECONDS)) {
- return NULL;
- }
- dest->tv_sec = year_seconds[year - EPOCH_YEAR];
+ dest->tv_sec = mktime64(year, src.month, src.day, src.hour, src.minute,
+ src.second);
dest->tv_sec -= offset * 60;
- yday = ((__mon_yday[__isleap(year)][src.month - 1]) + src.day - 1);
- dest->tv_sec += (((yday * 24) + src.hour) * 60 + src.minute) * 60 + src.second;
- dest->tv_nsec = 1000 * (src.centiseconds * 10000 +
+ /*
+ * Sanitize nanosecond field since reportedly some filesystems are
+ * recorded with bogus sub-second values.
+ */
+ if (src.centiseconds < 100 && src.hundredsOfMicroseconds < 100 &&
+ src.microseconds < 100) {
+ dest->tv_nsec = 1000 * (src.centiseconds * 10000 +
src.hundredsOfMicroseconds * 100 + src.microseconds);
- return dest;
+ } else {
+ dest->tv_nsec = 0;
+ }
}
-struct timestamp *
-udf_time_to_disk_stamp(struct timestamp *dest, struct timespec ts)
+void
+udf_time_to_disk_stamp(struct timestamp *dest, struct timespec64 ts)
{
- long int days, rem, y;
- const unsigned short int *ip;
+ time64_t seconds;
int16_t offset;
+ struct tm tm;
offset = -sys_tz.tz_minuteswest;
- if (!dest)
- return NULL;
-
dest->typeAndTimezone = cpu_to_le16(0x1000 | (offset & 0x0FFF));
- ts.tv_sec += offset * 60;
- days = ts.tv_sec / SECS_PER_DAY;
- rem = ts.tv_sec % SECS_PER_DAY;
- dest->hour = rem / SECS_PER_HOUR;
- rem %= SECS_PER_HOUR;
- dest->minute = rem / 60;
- dest->second = rem % 60;
- y = 1970;
-
-#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
-#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
-
- while (days < 0 || days >= (__isleap(y) ? 366 : 365)) {
- long int yg = y + days / 365 - (days % 365 < 0);
-
- /* Adjust DAYS and Y to match the guessed year. */
- days -= ((yg - y) * 365
- + LEAPS_THRU_END_OF(yg - 1)
- - LEAPS_THRU_END_OF(y - 1));
- y = yg;
- }
- dest->year = cpu_to_le16(y);
- ip = __mon_yday[__isleap(y)];
- for (y = 11; days < (long int)ip[y]; --y)
- continue;
- days -= ip[y];
- dest->month = y + 1;
- dest->day = days + 1;
-
+ seconds = ts.tv_sec + offset * 60;
+ time64_to_tm(seconds, 0, &tm);
+ dest->year = cpu_to_le16(tm.tm_year + 1900);
+ dest->month = tm.tm_mon + 1;
+ dest->day = tm.tm_mday;
+ dest->hour = tm.tm_hour;
+ dest->minute = tm.tm_min;
+ dest->second = tm.tm_sec;
dest->centiseconds = ts.tv_nsec / 10000000;
dest->hundredsOfMicroseconds = (ts.tv_nsec / 1000 -
dest->centiseconds * 10000) / 100;
dest->microseconds = (ts.tv_nsec / 1000 - dest->centiseconds * 10000 -
dest->hundredsOfMicroseconds * 100);
- return dest;
}
/* EOF */
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c
index 44b815e57f94..32c7f3d27f74 100644
--- a/fs/udf/unicode.c
+++ b/fs/udf/unicode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* unicode.c
*
@@ -11,11 +12,6 @@
* UTF-8 is explained in the IETF RFC XXXX.
* ftp://ftp.internic.net/rfc/rfcxxxx.txt
*
- * COPYRIGHT
- * This file is distributed under the terms of the GNU General Public
- * License (GPL). Copies of the GPL can be obtained from:
- * ftp://prep.ai.mit.edu/pub/gnu/GPL
- * Each contributing author retains all rights to their own work.
*/
#include "udfdecl.h"
@@ -28,466 +24,375 @@
#include "udf_sb.h"
-static int udf_translate_to_linux(uint8_t *, uint8_t *, int, uint8_t *, int);
+#define PLANE_SIZE 0x10000
+#define UNICODE_MAX 0x10ffff
+#define SURROGATE_MASK 0xfffff800
+#define SURROGATE_PAIR 0x0000d800
+#define SURROGATE_LOW 0x00000400
+#define SURROGATE_CHAR_BITS 10
+#define SURROGATE_CHAR_MASK ((1 << SURROGATE_CHAR_BITS) - 1)
-static int udf_char_to_ustr(struct ustr *dest, const uint8_t *src, int strlen)
-{
- if ((!dest) || (!src) || (!strlen) || (strlen > UDF_NAME_LEN - 2))
- return 0;
-
- memset(dest, 0, sizeof(struct ustr));
- memcpy(dest->u_name, src, strlen);
- dest->u_cmpID = 0x08;
- dest->u_len = strlen;
-
- return strlen;
-}
+#define ILLEGAL_CHAR_MARK '_'
+#define EXT_MARK '.'
+#define CRC_MARK '#'
+#define EXT_SIZE 5
+/* Number of chars we need to store generated CRC to make filename unique */
+#define CRC_LEN 5
-/*
- * udf_build_ustr
- */
-int udf_build_ustr(struct ustr *dest, dstring *ptr, int size)
+static unicode_t get_utf16_char(const uint8_t *str_i, int str_i_max_len,
+ int str_i_idx, int u_ch, unicode_t *ret)
{
- int usesize;
+ unicode_t c;
+ int start_idx = str_i_idx;
+
+ /* Expand OSTA compressed Unicode to Unicode */
+ c = str_i[str_i_idx++];
+ if (u_ch > 1)
+ c = (c << 8) | str_i[str_i_idx++];
+ if ((c & SURROGATE_MASK) == SURROGATE_PAIR) {
+ unicode_t next;
+
+ /* Trailing surrogate char */
+ if (str_i_idx >= str_i_max_len) {
+ c = UNICODE_MAX + 1;
+ goto out;
+ }
- if (!dest || !ptr || !size)
- return -1;
- BUG_ON(size < 2);
+ /* Low surrogate must follow the high one... */
+ if (c & SURROGATE_LOW) {
+ c = UNICODE_MAX + 1;
+ goto out;
+ }
- usesize = min_t(size_t, ptr[size - 1], sizeof(dest->u_name));
- usesize = min(usesize, size - 2);
- dest->u_cmpID = ptr[0];
- dest->u_len = usesize;
- memcpy(dest->u_name, ptr + 1, usesize);
- memset(dest->u_name + usesize, 0, sizeof(dest->u_name) - usesize);
+ WARN_ON_ONCE(u_ch != 2);
+ next = str_i[str_i_idx++] << 8;
+ next |= str_i[str_i_idx++];
+ if ((next & SURROGATE_MASK) != SURROGATE_PAIR ||
+ !(next & SURROGATE_LOW)) {
+ c = UNICODE_MAX + 1;
+ goto out;
+ }
- return 0;
+ c = PLANE_SIZE +
+ ((c & SURROGATE_CHAR_MASK) << SURROGATE_CHAR_BITS) +
+ (next & SURROGATE_CHAR_MASK);
+ }
+out:
+ *ret = c;
+ return str_i_idx - start_idx;
}
-/*
- * udf_build_ustr_exact
- */
-static int udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize)
-{
- if ((!dest) || (!ptr) || (!exactsize))
- return -1;
- memset(dest, 0, sizeof(struct ustr));
- dest->u_cmpID = ptr[0];
- dest->u_len = exactsize - 1;
- memcpy(dest->u_name, ptr + 1, exactsize - 1);
+static int udf_name_conv_char(uint8_t *str_o, int str_o_max_len,
+ int *str_o_idx,
+ const uint8_t *str_i, int str_i_max_len,
+ int *str_i_idx,
+ int u_ch, int *needsCRC,
+ int (*conv_f)(wchar_t, unsigned char *, int),
+ int translate)
+{
+ unicode_t c;
+ int illChar = 0;
+ int len, gotch = 0;
+
+ while (!gotch && *str_i_idx < str_i_max_len) {
+ if (*str_o_idx >= str_o_max_len) {
+ *needsCRC = 1;
+ return gotch;
+ }
- return 0;
+ len = get_utf16_char(str_i, str_i_max_len, *str_i_idx, u_ch,
+ &c);
+ /* These chars cannot be converted. Replace them. */
+ if (c == 0 || c > UNICODE_MAX || (conv_f && c > MAX_WCHAR_T) ||
+ (translate && c == '/')) {
+ illChar = 1;
+ if (!translate)
+ gotch = 1;
+ } else if (illChar)
+ break;
+ else
+ gotch = 1;
+ *str_i_idx += len;
+ }
+ if (illChar) {
+ *needsCRC = 1;
+ c = ILLEGAL_CHAR_MARK;
+ gotch = 1;
+ }
+ if (gotch) {
+ if (conv_f) {
+ len = conv_f(c, &str_o[*str_o_idx],
+ str_o_max_len - *str_o_idx);
+ } else {
+ len = utf32_to_utf8(c, &str_o[*str_o_idx],
+ str_o_max_len - *str_o_idx);
+ if (len < 0)
+ len = -ENAMETOOLONG;
+ }
+ /* Valid character? */
+ if (len >= 0)
+ *str_o_idx += len;
+ else if (len == -ENAMETOOLONG) {
+ *needsCRC = 1;
+ gotch = 0;
+ } else {
+ str_o[(*str_o_idx)++] = ILLEGAL_CHAR_MARK;
+ *needsCRC = 1;
+ }
+ }
+ return gotch;
}
-/*
- * udf_ocu_to_utf8
- *
- * PURPOSE
- * Convert OSTA Compressed Unicode to the UTF-8 equivalent.
- *
- * PRE-CONDITIONS
- * utf Pointer to UTF-8 output buffer.
- * ocu Pointer to OSTA Compressed Unicode input buffer
- * of size UDF_NAME_LEN bytes.
- * both of type "struct ustr *"
- *
- * POST-CONDITIONS
- * <return> Zero on success.
- *
- * HISTORY
- * November 12, 1997 - Andrew E. Mileski
- * Written, tested, and released.
- */
-int udf_CS0toUTF8(struct ustr *utf_o, const struct ustr *ocu_i)
+static int udf_name_from_CS0(struct super_block *sb,
+ uint8_t *str_o, int str_max_len,
+ const uint8_t *ocu, int ocu_len,
+ int translate)
{
- const uint8_t *ocu;
- uint8_t cmp_id, ocu_len;
- int i;
+ uint32_t c;
+ uint8_t cmp_id;
+ int idx, len;
+ int u_ch;
+ int needsCRC = 0;
+ int ext_i_len, ext_max_len;
+ int str_o_len = 0; /* Length of resulting output */
+ int ext_o_len = 0; /* Extension output length */
+ int ext_crc_len = 0; /* Extension output length if used with CRC */
+ int i_ext = -1; /* Extension position in input buffer */
+ int o_crc = 0; /* Rightmost possible output pos for CRC+ext */
+ unsigned short valueCRC;
+ uint8_t ext[EXT_SIZE * NLS_MAX_CHARSET_SIZE + 1];
+ uint8_t crc[CRC_LEN];
+ int (*conv_f)(wchar_t, unsigned char *, int);
- ocu_len = ocu_i->u_len;
- if (ocu_len == 0) {
- memset(utf_o, 0, sizeof(struct ustr));
+ if (str_max_len <= 0)
return 0;
- }
- cmp_id = ocu_i->u_cmpID;
- if (cmp_id != 8 && cmp_id != 16) {
- memset(utf_o, 0, sizeof(struct ustr));
- pr_err("unknown compression code (%d) stri=%s\n",
- cmp_id, ocu_i->u_name);
+ if (ocu_len == 0) {
+ memset(str_o, 0, str_max_len);
return 0;
}
- ocu = ocu_i->u_name;
- utf_o->u_len = 0;
- for (i = 0; (i < ocu_len) && (utf_o->u_len <= (UDF_NAME_LEN - 3));) {
-
- /* Expand OSTA compressed Unicode to Unicode */
- uint32_t c = ocu[i++];
- if (cmp_id == 16)
- c = (c << 8) | ocu[i++];
-
- /* Compress Unicode to UTF-8 */
- if (c < 0x80U)
- utf_o->u_name[utf_o->u_len++] = (uint8_t)c;
- else if (c < 0x800U) {
- utf_o->u_name[utf_o->u_len++] =
- (uint8_t)(0xc0 | (c >> 6));
- utf_o->u_name[utf_o->u_len++] =
- (uint8_t)(0x80 | (c & 0x3f));
- } else {
- utf_o->u_name[utf_o->u_len++] =
- (uint8_t)(0xe0 | (c >> 12));
- utf_o->u_name[utf_o->u_len++] =
- (uint8_t)(0x80 |
- ((c >> 6) & 0x3f));
- utf_o->u_name[utf_o->u_len++] =
- (uint8_t)(0x80 | (c & 0x3f));
- }
+ if (UDF_SB(sb)->s_nls_map)
+ conv_f = UDF_SB(sb)->s_nls_map->uni2char;
+ else
+ conv_f = NULL;
+
+ cmp_id = ocu[0];
+ if (cmp_id != 8 && cmp_id != 16) {
+ memset(str_o, 0, str_max_len);
+ pr_err("unknown compression code (%u)\n", cmp_id);
+ return -EINVAL;
}
- utf_o->u_cmpID = 8;
+ u_ch = cmp_id >> 3;
- return utf_o->u_len;
-}
+ ocu++;
+ ocu_len--;
-/*
- *
- * udf_utf8_to_ocu
- *
- * PURPOSE
- * Convert UTF-8 to the OSTA Compressed Unicode equivalent.
- *
- * DESCRIPTION
- * This routine is only called by udf_lookup().
- *
- * PRE-CONDITIONS
- * ocu Pointer to OSTA Compressed Unicode output
- * buffer of size UDF_NAME_LEN bytes.
- * utf Pointer to UTF-8 input buffer.
- * utf_len Length of UTF-8 input buffer in bytes.
- *
- * POST-CONDITIONS
- * <return> Zero on success.
- *
- * HISTORY
- * November 12, 1997 - Andrew E. Mileski
- * Written, tested, and released.
- */
-static int udf_UTF8toCS0(dstring *ocu, struct ustr *utf, int length)
-{
- unsigned c, i, max_val, utf_char;
- int utf_cnt, u_len;
-
- memset(ocu, 0, sizeof(dstring) * length);
- ocu[0] = 8;
- max_val = 0xffU;
+ if (ocu_len % u_ch) {
+ pr_err("incorrect filename length (%d)\n", ocu_len + 1);
+ return -EINVAL;
+ }
-try_again:
- u_len = 0U;
- utf_char = 0U;
- utf_cnt = 0U;
- for (i = 0U; i < utf->u_len; i++) {
- c = (uint8_t)utf->u_name[i];
-
- /* Complete a multi-byte UTF-8 character */
- if (utf_cnt) {
- utf_char = (utf_char << 6) | (c & 0x3fU);
- if (--utf_cnt)
- continue;
- } else {
- /* Check for a multi-byte UTF-8 character */
- if (c & 0x80U) {
- /* Start a multi-byte UTF-8 character */
- if ((c & 0xe0U) == 0xc0U) {
- utf_char = c & 0x1fU;
- utf_cnt = 1;
- } else if ((c & 0xf0U) == 0xe0U) {
- utf_char = c & 0x0fU;
- utf_cnt = 2;
- } else if ((c & 0xf8U) == 0xf0U) {
- utf_char = c & 0x07U;
- utf_cnt = 3;
- } else if ((c & 0xfcU) == 0xf8U) {
- utf_char = c & 0x03U;
- utf_cnt = 4;
- } else if ((c & 0xfeU) == 0xfcU) {
- utf_char = c & 0x01U;
- utf_cnt = 5;
- } else {
- goto error_out;
- }
- continue;
- } else {
- /* Single byte UTF-8 character (most common) */
- utf_char = c;
+ if (translate) {
+ /* Look for extension */
+ for (idx = ocu_len - u_ch, ext_i_len = 0;
+ (idx >= 0) && (ext_i_len < EXT_SIZE);
+ idx -= u_ch, ext_i_len++) {
+ c = ocu[idx];
+ if (u_ch > 1)
+ c = (c << 8) | ocu[idx + 1];
+
+ if (c == EXT_MARK) {
+ if (ext_i_len)
+ i_ext = idx;
+ break;
}
}
-
- /* Choose no compression if necessary */
- if (utf_char > max_val) {
- if (max_val == 0xffU) {
- max_val = 0xffffU;
- ocu[0] = (uint8_t)0x10U;
- goto try_again;
+ if (i_ext >= 0) {
+ /* Convert extension */
+ ext_max_len = min_t(int, sizeof(ext), str_max_len);
+ ext[ext_o_len++] = EXT_MARK;
+ idx = i_ext + u_ch;
+ while (udf_name_conv_char(ext, ext_max_len, &ext_o_len,
+ ocu, ocu_len, &idx,
+ u_ch, &needsCRC,
+ conv_f, translate)) {
+ if ((ext_o_len + CRC_LEN) < str_max_len)
+ ext_crc_len = ext_o_len;
}
- goto error_out;
}
-
- if (max_val == 0xffffU)
- ocu[++u_len] = (uint8_t)(utf_char >> 8);
- ocu[++u_len] = (uint8_t)(utf_char & 0xffU);
}
- if (utf_cnt) {
-error_out:
- ocu[++u_len] = '?';
- printk(KERN_DEBUG pr_fmt("bad UTF-8 character\n"));
+ idx = 0;
+ while (1) {
+ if (translate && (idx == i_ext)) {
+ if (str_o_len > (str_max_len - ext_o_len))
+ needsCRC = 1;
+ break;
+ }
+
+ if (!udf_name_conv_char(str_o, str_max_len, &str_o_len,
+ ocu, ocu_len, &idx,
+ u_ch, &needsCRC, conv_f, translate))
+ break;
+
+ if (translate &&
+ (str_o_len <= (str_max_len - ext_o_len - CRC_LEN)))
+ o_crc = str_o_len;
}
- ocu[length - 1] = (uint8_t)u_len + 1;
+ if (translate) {
+ if (str_o_len > 0 && str_o_len <= 2 && str_o[0] == '.' &&
+ (str_o_len == 1 || str_o[1] == '.'))
+ needsCRC = 1;
+ if (needsCRC) {
+ str_o_len = o_crc;
+ valueCRC = crc_itu_t(0, ocu, ocu_len);
+ crc[0] = CRC_MARK;
+ crc[1] = hex_asc_upper_hi(valueCRC >> 8);
+ crc[2] = hex_asc_upper_lo(valueCRC >> 8);
+ crc[3] = hex_asc_upper_hi(valueCRC);
+ crc[4] = hex_asc_upper_lo(valueCRC);
+ len = min_t(int, CRC_LEN, str_max_len - str_o_len);
+ memcpy(&str_o[str_o_len], crc, len);
+ str_o_len += len;
+ ext_o_len = ext_crc_len;
+ }
+ if (ext_o_len > 0) {
+ memcpy(&str_o[str_o_len], ext, ext_o_len);
+ str_o_len += ext_o_len;
+ }
+ }
- return u_len + 1;
+ return str_o_len;
}
-static int udf_CS0toNLS(struct nls_table *nls, struct ustr *utf_o,
- const struct ustr *ocu_i)
+static int udf_name_to_CS0(struct super_block *sb,
+ uint8_t *ocu, int ocu_max_len,
+ const uint8_t *str_i, int str_len)
{
- const uint8_t *ocu;
- uint8_t cmp_id, ocu_len;
int i, len;
+ unsigned int max_val;
+ int u_len, u_ch;
+ unicode_t uni_char;
+ int (*conv_f)(const unsigned char *, int, wchar_t *);
-
- ocu_len = ocu_i->u_len;
- if (ocu_len == 0) {
- memset(utf_o, 0, sizeof(struct ustr));
+ if (ocu_max_len <= 0)
return 0;
- }
- cmp_id = ocu_i->u_cmpID;
- if (cmp_id != 8 && cmp_id != 16) {
- memset(utf_o, 0, sizeof(struct ustr));
- pr_err("unknown compression code (%d) stri=%s\n",
- cmp_id, ocu_i->u_name);
- return 0;
- }
+ if (UDF_SB(sb)->s_nls_map)
+ conv_f = UDF_SB(sb)->s_nls_map->char2uni;
+ else
+ conv_f = NULL;
- ocu = ocu_i->u_name;
- utf_o->u_len = 0;
- for (i = 0; (i < ocu_len) && (utf_o->u_len <= (UDF_NAME_LEN - 3));) {
- /* Expand OSTA compressed Unicode to Unicode */
- uint32_t c = ocu[i++];
- if (cmp_id == 16)
- c = (c << 8) | ocu[i++];
-
- len = nls->uni2char(c, &utf_o->u_name[utf_o->u_len],
- UDF_NAME_LEN - utf_o->u_len);
- /* Valid character? */
- if (len >= 0)
- utf_o->u_len += len;
- else
- utf_o->u_name[utf_o->u_len++] = '?';
- }
- utf_o->u_cmpID = 8;
-
- return utf_o->u_len;
-}
-
-static int udf_NLStoCS0(struct nls_table *nls, dstring *ocu, struct ustr *uni,
- int length)
-{
- int len;
- unsigned i, max_val;
- uint16_t uni_char;
- int u_len;
-
- memset(ocu, 0, sizeof(dstring) * length);
+ memset(ocu, 0, ocu_max_len);
ocu[0] = 8;
- max_val = 0xffU;
+ max_val = 0xff;
+ u_ch = 1;
try_again:
- u_len = 0U;
- for (i = 0U; i < uni->u_len; i++) {
- len = nls->char2uni(&uni->u_name[i], uni->u_len - i, &uni_char);
- if (!len)
- continue;
+ u_len = 1;
+ for (i = 0; i < str_len; i += len) {
+ /* Name didn't fit? */
+ if (u_len + u_ch > ocu_max_len)
+ return 0;
+ if (conv_f) {
+ wchar_t wchar;
+
+ len = conv_f(&str_i[i], str_len - i, &wchar);
+ if (len > 0)
+ uni_char = wchar;
+ } else {
+ len = utf8_to_utf32(&str_i[i], str_len - i,
+ &uni_char);
+ }
/* Invalid character, deal with it */
- if (len < 0) {
+ if (len <= 0 || uni_char > UNICODE_MAX) {
len = 1;
uni_char = '?';
}
if (uni_char > max_val) {
- max_val = 0xffffU;
- ocu[0] = (uint8_t)0x10U;
- goto try_again;
+ unicode_t c;
+
+ if (max_val == 0xff) {
+ max_val = 0xffff;
+ ocu[0] = 0x10;
+ u_ch = 2;
+ goto try_again;
+ }
+ /*
+ * Use UTF-16 encoding for chars outside we
+ * cannot encode directly.
+ */
+ if (u_len + 2 * u_ch > ocu_max_len)
+ return 0;
+
+ uni_char -= PLANE_SIZE;
+ c = SURROGATE_PAIR |
+ ((uni_char >> SURROGATE_CHAR_BITS) &
+ SURROGATE_CHAR_MASK);
+ ocu[u_len++] = (uint8_t)(c >> 8);
+ ocu[u_len++] = (uint8_t)(c & 0xff);
+ uni_char = SURROGATE_PAIR | SURROGATE_LOW |
+ (uni_char & SURROGATE_CHAR_MASK);
}
- if (max_val == 0xffffU)
- ocu[++u_len] = (uint8_t)(uni_char >> 8);
- ocu[++u_len] = (uint8_t)(uni_char & 0xffU);
- i += len - 1;
+ if (max_val == 0xffff)
+ ocu[u_len++] = (uint8_t)(uni_char >> 8);
+ ocu[u_len++] = (uint8_t)(uni_char & 0xff);
}
- ocu[length - 1] = (uint8_t)u_len + 1;
- return u_len + 1;
+ return u_len;
}
-int udf_get_filename(struct super_block *sb, uint8_t *sname, uint8_t *dname,
- int flen)
+/*
+ * Convert CS0 dstring to output charset. Warning: This function may truncate
+ * input string if it is too long as it is used for informational strings only
+ * and it is better to truncate the string than to refuse mounting a media.
+ */
+int udf_dstrCS0toChar(struct super_block *sb, uint8_t *utf_o, int o_len,
+ const uint8_t *ocu_i, int i_len)
{
- struct ustr *filename, *unifilename;
- int len = 0;
-
- filename = kmalloc(sizeof(struct ustr), GFP_NOFS);
- if (!filename)
- return 0;
-
- unifilename = kmalloc(sizeof(struct ustr), GFP_NOFS);
- if (!unifilename)
- goto out1;
-
- if (udf_build_ustr_exact(unifilename, sname, flen))
- goto out2;
-
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) {
- if (!udf_CS0toUTF8(filename, unifilename)) {
- udf_debug("Failed in udf_get_filename: sname = %s\n",
- sname);
- goto out2;
- }
- } else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) {
- if (!udf_CS0toNLS(UDF_SB(sb)->s_nls_map, filename,
- unifilename)) {
- udf_debug("Failed in udf_get_filename: sname = %s\n",
- sname);
- goto out2;
+ int s_len = 0;
+
+ if (i_len > 0) {
+ s_len = ocu_i[i_len - 1];
+ if (s_len >= i_len) {
+ pr_warn("incorrect dstring lengths (%d/%d),"
+ " truncating\n", s_len, i_len);
+ s_len = i_len - 1;
+ /* 2-byte encoding? Need to round properly... */
+ if (ocu_i[0] == 16)
+ s_len -= (s_len - 1) & 2;
}
- } else
- goto out2;
-
- len = udf_translate_to_linux(dname, filename->u_name, filename->u_len,
- unifilename->u_name, unifilename->u_len);
-out2:
- kfree(unifilename);
-out1:
- kfree(filename);
- return len;
+ }
+
+ return udf_name_from_CS0(sb, utf_o, o_len, ocu_i, s_len, 0);
}
-int udf_put_filename(struct super_block *sb, const uint8_t *sname,
- uint8_t *dname, int flen)
+int udf_get_filename(struct super_block *sb, const uint8_t *sname, int slen,
+ uint8_t *dname, int dlen)
{
- struct ustr unifilename;
- int namelen;
+ int ret;
- if (!udf_char_to_ustr(&unifilename, sname, flen))
- return 0;
+ if (!slen)
+ return -EIO;
- if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) {
- namelen = udf_UTF8toCS0(dname, &unifilename, UDF_NAME_LEN);
- if (!namelen)
- return 0;
- } else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) {
- namelen = udf_NLStoCS0(UDF_SB(sb)->s_nls_map, dname,
- &unifilename, UDF_NAME_LEN);
- if (!namelen)
- return 0;
- } else
+ if (dlen <= 0)
return 0;
- return namelen;
+ ret = udf_name_from_CS0(sb, dname, dlen, sname, slen, 1);
+ /* Zero length filename isn't valid... */
+ if (ret == 0)
+ ret = -EINVAL;
+ return ret;
}
-#define ILLEGAL_CHAR_MARK '_'
-#define EXT_MARK '.'
-#define CRC_MARK '#'
-#define EXT_SIZE 5
-
-static int udf_translate_to_linux(uint8_t *newName, uint8_t *udfName,
- int udfLen, uint8_t *fidName,
- int fidNameLen)
+int udf_put_filename(struct super_block *sb, const uint8_t *sname, int slen,
+ uint8_t *dname, int dlen)
{
- int index, newIndex = 0, needsCRC = 0;
- int extIndex = 0, newExtIndex = 0, hasExt = 0;
- unsigned short valueCRC;
- uint8_t curr;
- const uint8_t hexChar[] = "0123456789ABCDEF";
-
- if (udfName[0] == '.' &&
- (udfLen == 1 || (udfLen == 2 && udfName[1] == '.'))) {
- needsCRC = 1;
- newIndex = udfLen;
- memcpy(newName, udfName, udfLen);
- } else {
- for (index = 0; index < udfLen; index++) {
- curr = udfName[index];
- if (curr == '/' || curr == 0) {
- needsCRC = 1;
- curr = ILLEGAL_CHAR_MARK;
- while (index + 1 < udfLen &&
- (udfName[index + 1] == '/' ||
- udfName[index + 1] == 0))
- index++;
- }
- if (curr == EXT_MARK &&
- (udfLen - index - 1) <= EXT_SIZE) {
- if (udfLen == index + 1)
- hasExt = 0;
- else {
- hasExt = 1;
- extIndex = index;
- newExtIndex = newIndex;
- }
- }
- if (newIndex < 256)
- newName[newIndex++] = curr;
- else
- needsCRC = 1;
- }
- }
- if (needsCRC) {
- uint8_t ext[EXT_SIZE];
- int localExtIndex = 0;
-
- if (hasExt) {
- int maxFilenameLen;
- for (index = 0;
- index < EXT_SIZE && extIndex + index + 1 < udfLen;
- index++) {
- curr = udfName[extIndex + index + 1];
-
- if (curr == '/' || curr == 0) {
- needsCRC = 1;
- curr = ILLEGAL_CHAR_MARK;
- while (extIndex + index + 2 < udfLen &&
- (index + 1 < EXT_SIZE &&
- (udfName[extIndex + index + 2] == '/' ||
- udfName[extIndex + index + 2] == 0)))
- index++;
- }
- ext[localExtIndex++] = curr;
- }
- maxFilenameLen = 250 - localExtIndex;
- if (newIndex > maxFilenameLen)
- newIndex = maxFilenameLen;
- else
- newIndex = newExtIndex;
- } else if (newIndex > 250)
- newIndex = 250;
- newName[newIndex++] = CRC_MARK;
- valueCRC = crc_itu_t(0, fidName, fidNameLen);
- newName[newIndex++] = hexChar[(valueCRC & 0xf000) >> 12];
- newName[newIndex++] = hexChar[(valueCRC & 0x0f00) >> 8];
- newName[newIndex++] = hexChar[(valueCRC & 0x00f0) >> 4];
- newName[newIndex++] = hexChar[(valueCRC & 0x000f)];
-
- if (hasExt) {
- newName[newIndex++] = EXT_MARK;
- for (index = 0; index < localExtIndex; index++)
- newName[newIndex++] = ext[index];
- }
- }
-
- return newIndex;
+ return udf_name_to_CS0(sb, dname, dlen, sname, slen);
}
+
generated by cgit (git 2.34.1) at 2025-12-25 02:51:05 +0000