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authorEric Sandeen <sandeen@redhat.com>2006-12-06 20:40:13 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 08:39:44 -0800
commita8f48a95619cbce8f85423480e7d0a1bf971a62b (patch)
treec33bf8406bb61945c4031b89cad533b041599567 /fs/ext4/super.c
parenta0e7688df1484fbf4d6d61c31f7d61a5d8cacf3c (diff)
downloadop-kernel-dev-a8f48a95619cbce8f85423480e7d0a1bf971a62b.zip
op-kernel-dev-a8f48a95619cbce8f85423480e7d0a1bf971a62b.tar.gz
[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/super.c')
-rw-r--r--fs/ext4/super.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 2ede7e2..486a641 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, "
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