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ext4: drop EXT4_MF_FS_ABORTED flag 

EXT4_MF_FS_ABORTED flag has practically the same intent as
EXT4_FLAGS_SHUTDOWN flag. The shutdown flag is checked in many more
places than the aborted flag which is mostly the historical artifact
where we were relying on SB_RDONLY checks instead of the aborted flag
checks. There are only three places - ext4_sync_file(),
__ext4_remount(), and mballoc debug code - which check aborted flag and
not shutdown flag and this is arguably a bug. Avoid these
inconsistencies by removing EXT4_MF_FS_ABORTED flag and using
EXT4_FLAGS_SHUTDOWN everywhere.

Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230616165109.21695-5-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Jan Kara 2023-06-16 18:50:51 +02:00 committed by Theodore Ts'o
parent 22b8d707b0
commit 95257987a6
5 changed files with 10 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
fs/ext4/ext4.h
View File

@ -1799,7 +1799,6 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
*/
enum {
EXT4_MF_MNTDIR_SAMPLED,
EXT4_MF_FS_ABORTED, /* Fatal error detected */
EXT4_MF_FC_INELIGIBLE /* Fast commit ineligible */
};

7
fs/ext4/fsync.c
View File

@ -131,7 +131,6 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
int ret = 0, err;
bool needs_barrier = false;
struct inode *inode = file->f_mapping->host;
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
if (unlikely(ext4_forced_shutdown(inode->i_sb)))
return -EIO;
@ -141,14 +140,14 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
trace_ext4_sync_file_enter(file, datasync);
if (sb_rdonly(inode->i_sb)) {
/* Make sure that we read updated s_mount_flags value */
/* Make sure that we read updated s_ext4_flags value */
smp_rmb();
if (ext4_test_mount_flag(inode->i_sb, EXT4_MF_FS_ABORTED))
if (ext4_forced_shutdown(inode->i_sb))
ret = -EROFS;
goto out;
}
if (!sbi->s_journal) {
if (!EXT4_SB(inode->i_sb)->s_journal) {
ret = ext4_fsync_nojournal(file, start, end, datasync,
&needs_barrier);
if (needs_barrier)

8
fs/ext4/inode.c
View File

@ -2213,8 +2213,7 @@ static int mpage_map_and_submit_extent(handle_t *handle,
if (err < 0) {
struct super_block *sb = inode->i_sb;
if (ext4_forced_shutdown(sb) ||
ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED))
if (ext4_forced_shutdown(sb))
goto invalidate_dirty_pages;
/*
* Let the uper layers retry transient errors.
@ -2534,14 +2533,13 @@ static int ext4_do_writepages(struct mpage_da_data *mpd)
* If the filesystem has aborted, it is read-only, so return
* right away instead of dumping stack traces later on that
* will obscure the real source of the problem. We test
* EXT4_MF_FS_ABORTED instead of sb->s_flag's SB_RDONLY because
* fs shutdown state instead of sb->s_flag's SB_RDONLY because
* the latter could be true if the filesystem is mounted
* read-only, and in that case, ext4_writepages should
* *never* be called, so if that ever happens, we would want
* the stack trace.
*/
if (unlikely(ext4_forced_shutdown(mapping->host->i_sb) ||
ext4_test_mount_flag(inode->i_sb, EXT4_MF_FS_ABORTED))) {
if (unlikely(ext4_forced_shutdown(mapping->host->i_sb))) {
ret = -EROFS;
goto out_writepages;
}

4
fs/ext4/mballoc.c
View File

@ -5664,7 +5664,7 @@ static inline void ext4_mb_show_pa(struct super_block *sb)
{
ext4_group_t i, ngroups;
if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED))
if (ext4_forced_shutdown(sb))
return;
ngroups = ext4_get_groups_count(sb);
@ -5698,7 +5698,7 @@ static void ext4_mb_show_ac(struct ext4_allocation_context *ac)
{
struct super_block *sb = ac->ac_sb;
if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED))
if (ext4_forced_shutdown(sb))
return;
mb_debug(sb, "Can't allocate:"

4
fs/ext4/super.c
View File

@ -657,7 +657,7 @@ static void ext4_handle_error(struct super_block *sb, bool force_ro, int error,
WARN_ON_ONCE(1);
if (!continue_fs && !sb_rdonly(sb)) {
ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED);
set_bit(EXT4_FLAGS_SHUTDOWN, &EXT4_SB(sb)->s_ext4_flags);
if (journal)
jbd2_journal_abort(journal, -EIO);
}
@ -6502,7 +6502,7 @@ static int __ext4_remount(struct fs_context *fc, struct super_block *sb)
flush_work(&sbi->s_error_work);
if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) {
if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) {
if (ext4_forced_shutdown(sb)) {
err = -EROFS;
goto restore_opts;
}