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Diffstat (limited to 'fs/hfsplus/extents.c')
-rw-r--r--fs/hfsplus/extents.c73
1 files changed, 45 insertions, 28 deletions
diff --git a/fs/hfsplus/extents.c b/fs/hfsplus/extents.c
index a3eb640b4f8f..8e886514d27f 100644
--- a/fs/hfsplus/extents.c
+++ b/fs/hfsplus/extents.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* linux/fs/hfsplus/extents.c
*
@@ -99,6 +100,10 @@ static int __hfsplus_ext_write_extent(struct inode *inode,
if (hip->extent_state & HFSPLUS_EXT_NEW) {
if (res != -ENOENT)
return res;
+ /* Fail early and avoid ENOSPC during the btree operation */
+ res = hfs_bmap_reserve(fd->tree, fd->tree->depth + 1);
+ if (res)
+ return res;
hfs_brec_insert(fd, hip->cached_extents,
sizeof(hfsplus_extent_rec));
hip->extent_state &= ~(HFSPLUS_EXT_DIRTY | HFSPLUS_EXT_NEW);
@@ -232,7 +237,9 @@ int hfsplus_get_block(struct inode *inode, sector_t iblock,
ablock = iblock >> sbi->fs_shift;
if (iblock >= hip->fs_blocks) {
- if (iblock > hip->fs_blocks || !create)
+ if (!create)
+ return 0;
+ if (iblock > hip->fs_blocks)
return -EIO;
if (ablock >= hip->alloc_blocks) {
res = hfsplus_file_extend(inode, false);
@@ -268,7 +275,7 @@ int hfsplus_get_block(struct inode *inode, sector_t iblock,
mutex_unlock(&hip->extents_lock);
done:
- hfs_dbg(EXTENT, "get_block(%lu): %llu - %u\n",
+ hfs_dbg("ino %lu, iblock %llu - dblock %u\n",
inode->i_ino, (long long)iblock, dblock);
mask = (1 << sbi->fs_shift) - 1;
@@ -291,12 +298,12 @@ static void hfsplus_dump_extent(struct hfsplus_extent *extent)
{
int i;
- hfs_dbg(EXTENT, " ");
+ hfs_dbg("extent ");
for (i = 0; i < 8; i++)
- hfs_dbg_cont(EXTENT, " %u:%u",
- be32_to_cpu(extent[i].start_block),
- be32_to_cpu(extent[i].block_count));
- hfs_dbg_cont(EXTENT, "\n");
+ hfs_dbg(" start_block %u, block_count %u",
+ be32_to_cpu(extent[i].start_block),
+ be32_to_cpu(extent[i].block_count));
+ hfs_dbg("\n");
}
static int hfsplus_add_extent(struct hfsplus_extent *extent, u32 offset,
@@ -352,8 +359,7 @@ found:
if (count <= block_nr) {
err = hfsplus_block_free(sb, start, count);
if (err) {
- pr_err("can't free extent\n");
- hfs_dbg(EXTENT, " start: %u count: %u\n",
+ pr_err("can't free extent: start %u, count %u\n",
start, count);
}
extent->block_count = 0;
@@ -363,8 +369,7 @@ found:
count -= block_nr;
err = hfsplus_block_free(sb, start + count, block_nr);
if (err) {
- pr_err("can't free extent\n");
- hfs_dbg(EXTENT, " start: %u count: %u\n",
+ pr_err("can't free extent: start %u, count %u\n",
start, count);
}
extent->block_count = cpu_to_be32(count);
@@ -414,11 +419,14 @@ int hfsplus_free_fork(struct super_block *sb, u32 cnid,
if (res)
break;
start = be32_to_cpu(fd.key->ext.start_block);
- hfsplus_free_extents(sb, ext_entry,
- total_blocks - start,
- total_blocks);
hfs_brec_remove(&fd);
+
+ mutex_unlock(&fd.tree->tree_lock);
+ hfsplus_free_extents(sb, ext_entry, total_blocks - start,
+ total_blocks);
total_blocks = start;
+ mutex_lock_nested(&fd.tree->tree_lock,
+ hfsplus_btree_lock_class(fd.tree));
} while (total_blocks > blocks);
hfs_find_exit(&fd);
@@ -436,9 +444,9 @@ int hfsplus_file_extend(struct inode *inode, bool zeroout)
if (sbi->alloc_file->i_size * 8 <
sbi->total_blocks - sbi->free_blocks + 8) {
/* extend alloc file */
- pr_err("extend alloc file! (%llu,%u,%u)\n",
- sbi->alloc_file->i_size * 8,
- sbi->total_blocks, sbi->free_blocks);
+ pr_err_ratelimited("extend alloc file! (%llu,%u,%u)\n",
+ sbi->alloc_file->i_size * 8,
+ sbi->total_blocks, sbi->free_blocks);
return -ENOSPC;
}
@@ -468,11 +476,12 @@ int hfsplus_file_extend(struct inode *inode, bool zeroout)
goto out;
}
- hfs_dbg(EXTENT, "extend %lu: %u,%u\n", inode->i_ino, start, len);
+ hfs_dbg("ino %lu, start %u, len %u\n", inode->i_ino, start, len);
if (hip->alloc_blocks <= hip->first_blocks) {
if (!hip->first_blocks) {
- hfs_dbg(EXTENT, "first extents\n");
+ hfs_dbg("first_extent: start %u, len %u\n",
+ start, len);
/* no extents yet */
hip->first_extents[0].start_block = cpu_to_be32(start);
hip->first_extents[0].block_count = cpu_to_be32(len);
@@ -511,7 +520,7 @@ out:
return res;
insert_extent:
- hfs_dbg(EXTENT, "insert new extent\n");
+ hfs_dbg("insert new extent\n");
res = hfsplus_ext_write_extent_locked(inode);
if (res)
goto out;
@@ -536,21 +545,21 @@ void hfsplus_file_truncate(struct inode *inode)
u32 alloc_cnt, blk_cnt, start;
int res;
- hfs_dbg(INODE, "truncate: %lu, %llu -> %llu\n",
+ hfs_dbg("ino %lu, phys_size %llu -> i_size %llu\n",
inode->i_ino, (long long)hip->phys_size, inode->i_size);
if (inode->i_size > hip->phys_size) {
struct address_space *mapping = inode->i_mapping;
- struct page *page;
- void *fsdata;
+ struct folio *folio;
+ void *fsdata = NULL;
loff_t size = inode->i_size;
- res = pagecache_write_begin(NULL, mapping, size, 0, 0,
- &page, &fsdata);
+ res = hfsplus_write_begin(NULL, mapping, size, 0,
+ &folio, &fsdata);
if (res)
return;
- res = pagecache_write_end(NULL, mapping, size,
- 0, 0, page, fsdata);
+ res = generic_write_end(NULL, mapping, size, 0, 0,
+ folio, fsdata);
if (res < 0)
return;
mark_inode_dirty(inode);
@@ -575,19 +584,28 @@ void hfsplus_file_truncate(struct inode *inode)
}
while (1) {
if (alloc_cnt == hip->first_blocks) {
+ mutex_unlock(&fd.tree->tree_lock);
hfsplus_free_extents(sb, hip->first_extents,
alloc_cnt, alloc_cnt - blk_cnt);
hfsplus_dump_extent(hip->first_extents);
hip->first_blocks = blk_cnt;
+ mutex_lock_nested(&fd.tree->tree_lock,
+ hfsplus_btree_lock_class(fd.tree));
break;
}
res = __hfsplus_ext_cache_extent(&fd, inode, alloc_cnt);
if (res)
break;
+
start = hip->cached_start;
+ if (blk_cnt <= start)
+ hfs_brec_remove(&fd);
+ mutex_unlock(&fd.tree->tree_lock);
hfsplus_free_extents(sb, hip->cached_extents,
alloc_cnt - start, alloc_cnt - blk_cnt);
hfsplus_dump_extent(hip->cached_extents);
+ mutex_lock_nested(&fd.tree->tree_lock,
+ hfsplus_btree_lock_class(fd.tree));
if (blk_cnt > start) {
hip->extent_state |= HFSPLUS_EXT_DIRTY;
break;
@@ -595,7 +613,6 @@ void hfsplus_file_truncate(struct inode *inode)
alloc_cnt = start;
hip->cached_start = hip->cached_blocks = 0;
hip->extent_state &= ~(HFSPLUS_EXT_DIRTY | HFSPLUS_EXT_NEW);
- hfs_brec_remove(&fd);
}
hfs_find_exit(&fd);
generated by cgit (git 2.34.1) at 2025-12-25 14:39:16 +0000