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| author | Eric Sandeen <sandeen@redhat.com> | 2006-12-06 20:40:13 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 08:39:44 -0800 |
| commit | a8f48a95619cbce8f85423480e7d0a1bf971a62b (patch) | |
| tree | c33bf8406bb61945c4031b89cad533b041599567 /fs/ext4 | |
| parent | a0e7688df1484fbf4d6d61c31f7d61a5d8cacf3c (diff) | |
| download | lwn-a8f48a95619cbce8f85423480e7d0a1bf971a62b.tar.gz lwn-a8f48a95619cbce8f85423480e7d0a1bf971a62b.zip | |
[PATCH] ext3/4: don't do orphan processing on readonly devices
If you do something like:
# touch foo
# tail -f foo &
# rm foo
# <take snapshot>
# <mount snapshot>
you'll panic, because ext3/4 tries to do orphan list processing on the
readonly snapshot device, and:
kernel: journal commit I/O error
kernel: Assertion failure in journal_flush_Rsmp_e2f189ce() at journal.c:1356: "!journal->j_checkpoint_transactions"
kernel: Kernel panic: Fatal exception
for a truly readonly underlying device, it's reasonable and necessary
to just skip orphan list processing.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/super.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 2ede7e2c7019..486a641ca71b 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1321,6 +1321,12 @@ static void ext4_orphan_cleanup (struct super_block * sb, return; } + if (bdev_read_only(sb->s_bdev)) { + printk(KERN_ERR "EXT4-fs: write access " + "unavailable, skipping orphan cleanup.\n"); + return; + } + if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { if (es->s_last_orphan) jbd_debug(1, "Errors on filesystem, " |