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ext4: prevent used blocks from being allocated during fast commit replay

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commit 599ea31d13617c5484c40cdf50d88301dc351cfc upstream.

During fast commit replay procedure, we clear inode blocks bitmap in
ext4_ext_clear_bb(), this may cause ext4_mb_new_blocks_simple() allocate
blocks still in use.

Make ext4_fc_record_regions() also record physical disk regions used by
inodes during replay procedure. Then ext4_mb_new_blocks_simple() can
excludes these blocks in use.

Signed-off-by: Xin Yin <yinxin.x@bytedance.com>
Link: https://lore.kernel.org/r/20220110035141.1980-2-yinxin.x@bytedance.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xin Yin
2022-01-10 11:51:40 +08:00
committed by Greg Kroah-Hartman
parent ef2053afd7
commit 8d71fc23fc
3 changed files with 22 additions and 5 deletions
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3
fs/ext4/ext4.h
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@@ -2779,6 +2779,9 @@ void ext4_fc_replay_cleanup(struct super_block *sb);
int ext4_fc_commit(journal_t *journal, tid_t commit_tid);
int __init ext4_fc_init_dentry_cache(void);
void ext4_fc_destroy_dentry_cache(void);
int ext4_fc_record_regions(struct super_block *sb, int ino,
ext4_lblk_t lblk, ext4_fsblk_t pblk,
int len, int replay);
/* mballoc.c */
extern const struct seq_operations ext4_mb_seq_groups_ops;