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Diffstat (limited to 'fs/ext4/ioctl.c')
-rw-r--r--fs/ext4/ioctl.c133
1 files changed, 66 insertions, 67 deletions
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index afb66d4ab5cf..a7074115d6f6 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* linux/fs/ext4/ioctl.c
*
@@ -14,9 +15,11 @@
#include <linux/mount.h>
#include <linux/file.h>
#include <linux/quotaops.h>
+#include <linux/random.h>
#include <linux/uuid.h>
#include <linux/uaccess.h>
#include <linux/delay.h>
+#include <linux/iversion.h>
#include "ext4_jbd2.h"
#include "ext4.h"
#include <linux/fsmap.h>
@@ -98,7 +101,6 @@ static long swap_inode_boot_loader(struct super_block *sb,
int err;
struct inode *inode_bl;
struct ext4_inode_info *ei_bl;
- struct ext4_sb_info *sbi = EXT4_SB(sb);
if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode))
return -EINVAL;
@@ -122,8 +124,6 @@ static long swap_inode_boot_loader(struct super_block *sb,
truncate_inode_pages(&inode_bl->i_data, 0);
/* Wait for all existing dio workers */
- ext4_inode_block_unlocked_dio(inode);
- ext4_inode_block_unlocked_dio(inode_bl);
inode_dio_wait(inode);
inode_dio_wait(inode_bl);
@@ -143,7 +143,7 @@ static long swap_inode_boot_loader(struct super_block *sb,
i_gid_write(inode_bl, 0);
inode_bl->i_flags = 0;
ei_bl->i_flags = 0;
- inode_bl->i_version = 1;
+ inode_set_iversion(inode_bl, 1);
i_size_write(inode_bl, 0);
inode_bl->i_mode = S_IFREG;
if (ext4_has_feature_extents(sb)) {
@@ -157,10 +157,8 @@ static long swap_inode_boot_loader(struct super_block *sb,
inode->i_ctime = inode_bl->i_ctime = current_time(inode);
- spin_lock(&sbi->s_next_gen_lock);
- inode->i_generation = sbi->s_next_generation++;
- inode_bl->i_generation = sbi->s_next_generation++;
- spin_unlock(&sbi->s_next_gen_lock);
+ inode->i_generation = prandom_u32();
+ inode_bl->i_generation = prandom_u32();
ext4_discard_preallocations(inode);
@@ -186,8 +184,6 @@ static long swap_inode_boot_loader(struct super_block *sb,
ext4_double_up_write_data_sem(inode, inode_bl);
journal_err_out:
- ext4_inode_resume_unlocked_dio(inode);
- ext4_inode_resume_unlocked_dio(inode_bl);
unlock_two_nondirectories(inode, inode_bl);
iput(inode_bl);
return err;
@@ -290,10 +286,20 @@ flags_err:
if (err)
goto flags_out;
- if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
+ if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
+ /*
+ * Changes to the journaling mode can cause unsafe changes to
+ * S_DAX if we are using the DAX mount option.
+ */
+ if (test_opt(inode->i_sb, DAX)) {
+ err = -EBUSY;
+ goto flags_out;
+ }
+
err = ext4_change_inode_journal_flag(inode, jflag);
- if (err)
- goto flags_out;
+ if (err)
+ goto flags_out;
+ }
if (migrate) {
if (flags & EXT4_EXTENTS_FL)
err = ext4_ext_migrate(inode);
@@ -471,6 +477,7 @@ static int ext4_shutdown(struct super_block *sb, unsigned long arg)
return 0;
ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags);
+ trace_ext4_shutdown(sb, flags);
switch (flags) {
case EXT4_GOING_FLAGS_DEFAULT:
@@ -482,15 +489,13 @@ static int ext4_shutdown(struct super_block *sb, unsigned long arg)
set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
(void) ext4_force_commit(sb);
- jbd2_journal_abort(sbi->s_journal, 0);
+ jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
}
break;
case EXT4_GOING_FLAGS_NOLOGFLUSH:
set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
- if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
- msleep(100);
- jbd2_journal_abort(sbi->s_journal, 0);
- }
+ if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
+ jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN);
break;
default:
return -EINVAL;
@@ -583,6 +588,44 @@ static int ext4_ioc_getfsmap(struct super_block *sb,
return 0;
}
+static long ext4_ioctl_group_add(struct file *file,
+ struct ext4_new_group_data *input)
+{
+ struct super_block *sb = file_inode(file)->i_sb;
+ int err, err2=0;
+
+ err = ext4_resize_begin(sb);
+ if (err)
+ return err;
+
+ if (ext4_has_feature_bigalloc(sb)) {
+ ext4_msg(sb, KERN_ERR,
+ "Online resizing not supported with bigalloc");
+ err = -EOPNOTSUPP;
+ goto group_add_out;
+ }
+
+ err = mnt_want_write_file(file);
+ if (err)
+ goto group_add_out;
+
+ err = ext4_group_add(sb, input);
+ if (EXT4_SB(sb)->s_journal) {
+ jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
+ err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
+ jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
+ }
+ if (err == 0)
+ err = err2;
+ mnt_drop_write_file(file);
+ if (!err && ext4_has_group_desc_csum(sb) &&
+ test_opt(sb, INIT_INODE_TABLE))
+ err = ext4_register_li_request(sb, input->group);
+group_add_out:
+ ext4_resize_end(sb);
+ return err;
+}
+
long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
@@ -767,44 +810,12 @@ mext_out:
case EXT4_IOC_GROUP_ADD: {
struct ext4_new_group_data input;
- int err, err2=0;
-
- err = ext4_resize_begin(sb);
- if (err)
- return err;
if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
- sizeof(input))) {
- err = -EFAULT;
- goto group_add_out;
- }
-
- if (ext4_has_feature_bigalloc(sb)) {
- ext4_msg(sb, KERN_ERR,
- "Online resizing not supported with bigalloc");
- err = -EOPNOTSUPP;
- goto group_add_out;
- }
-
- err = mnt_want_write_file(filp);
- if (err)
- goto group_add_out;
+ sizeof(input)))
+ return -EFAULT;
- err = ext4_group_add(sb, &input);
- if (EXT4_SB(sb)->s_journal) {
- jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
- err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
- jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
- }
- if (err == 0)
- err = err2;
- mnt_drop_write_file(filp);
- if (!err && ext4_has_group_desc_csum(sb) &&
- test_opt(sb, INIT_INODE_TABLE))
- err = ext4_register_li_request(sb, input.group);
-group_add_out:
- ext4_resize_end(sb);
- return err;
+ return ext4_ioctl_group_add(filp, &input);
}
case EXT4_IOC_MIGRATE:
@@ -861,12 +872,6 @@ group_add_out:
int err = 0, err2 = 0;
ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;
- if (ext4_has_feature_bigalloc(sb)) {
- ext4_msg(sb, KERN_ERR,
- "Online resizing not (yet) supported with bigalloc");
- return -EOPNOTSUPP;
- }
-
if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
sizeof(__u64))) {
return -EFAULT;
@@ -1075,8 +1080,7 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
break;
case EXT4_IOC32_GROUP_ADD: {
struct compat_ext4_new_group_input __user *uinput;
- struct ext4_new_group_input input;
- mm_segment_t old_fs;
+ struct ext4_new_group_data input;
int err;
uinput = compat_ptr(arg);
@@ -1089,12 +1093,7 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
&uinput->reserved_blocks);
if (err)
return -EFAULT;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD,
- (unsigned long) &input);
- set_fs(old_fs);
- return err;
+ return ext4_ioctl_group_add(file, &input);
}
case EXT4_IOC_MOVE_EXT:
case EXT4_IOC_RESIZE_FS:
generated by cgit (git 2.34.1) at 2024-05-23 16:57:00 +0000