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| author | Theodore Ts'o <tytso@mit.edu> | 2018-07-08 19:36:02 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2018-07-08 19:36:02 -0400 |
| commit | 2dca60d98e241bea686004168f85208f215fc697 (patch) | |
| tree | 54f5910d68c13a4f88e22d36a4fe760740e9b174 | |
| parent | 44de022c4382541cebdd6de4465d1f4f465ff1dd (diff) | |
| download | linux-2dca60d98e241bea686004168f85208f215fc697.tar.bz2 | |
ext4: clear mmp sequence number when remounting read-only
Previously, when an MMP-protected file system is remounted read-only,
the kmmpd thread would exit the next time it woke up (a few seconds
later), without resetting the MMP sequence number back to
EXT4_MMP_SEQ_CLEAN.
Fix this by explicitly killing the MMP thread when the file system is
remounted read-only.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: Andreas Dilger <adilger@dilger.ca>
| -rw-r--r-- | fs/ext4/mmp.c | 7 | ||||
| -rw-r--r-- | fs/ext4/super.c | 2 |
2 files changed, 4 insertions, 5 deletions
diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c index 27b9a76a0dfa..638ad4743477 100644 --- a/fs/ext4/mmp.c +++ b/fs/ext4/mmp.c @@ -186,11 +186,8 @@ static int kmmpd(void *data) goto exit_thread; } - if (sb_rdonly(sb)) { - ext4_warning(sb, "kmmpd being stopped since filesystem " - "has been remounted as readonly."); - goto exit_thread; - } + if (sb_rdonly(sb)) + break; diff = jiffies - last_update_time; if (diff < mmp_update_interval * HZ) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index eff5c983e067..680526e9ee96 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5212,6 +5212,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data) if (sbi->s_journal) ext4_mark_recovery_complete(sb, es); + if (sbi->s_mmp_tsk) + kthread_stop(sbi->s_mmp_tsk); } else { /* Make sure we can mount this feature set readwrite */ if (ext4_has_feature_readonly(sb) || |