From c642dc9e1aaed953597e7092d7df329e6234096e Mon Sep 17 00:00:00 2001 From: Eric Sandeen Date: Sat, 15 Aug 2015 10:45:06 -0400 Subject: [PATCH] ext4: don't manipulate recovery flag when freezing no-journal fs At some point along this sequence of changes: f6e63f9 ext4: fold ext4_nojournal_sops into ext4_sops bb04457 ext4: support freezing ext2 (nojournal) file systems 9ca9238 ext4: Use separate super_operations structure for no_journal filesystems ext4 started setting needs_recovery on filesystems without journals when they are unfrozen. This makes no sense, and in fact confuses blkid to the point where it doesn't recognize the filesystem at all. (freeze ext2; unfreeze ext2; run blkid; see no output; run dumpe2fs, see needs_recovery set on fs w/ no journal). To fix this, don't manipulate the INCOMPAT_RECOVER feature on filesystems without journals. Reported-by: Stu Mark Reviewed-by: Jan Kara Signed-off-by: Eric Sandeen Signed-off-by: Theodore Ts'o Cc: stable@vger.kernel.org --- fs/ext4/super.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index a51db9c..70c52ea 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -4836,10 +4836,11 @@ static int ext4_freeze(struct super_block *sb) error = jbd2_journal_flush(journal); if (error < 0) goto out; + + /* Journal blocked and flushed, clear needs_recovery flag. */ + EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); } - /* Journal blocked and flushed, clear needs_recovery flag. */ - EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); error = ext4_commit_super(sb, 1); out: if (journal) @@ -4857,8 +4858,11 @@ static int ext4_unfreeze(struct super_block *sb) if (sb->s_flags & MS_RDONLY) return 0; - /* Reset the needs_recovery flag before the fs is unlocked. */ - EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); + if (EXT4_SB(sb)->s_journal) { + /* Reset the needs_recovery flag before the fs is unlocked. */ + EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); + } + ext4_commit_super(sb, 1); return 0; } -- 2.7.4