During orphan cleanup while doing truncate, if we fail to obtain journal
handle, the inode for which truncate was called would not be removed from
both the on-disk and in-memory orphan lists as the call to ext3_orphan_del
would not be executed.
This would have following consequences:
a) As the inode is not removed from the on-disk list, truncate would be
called again for the same inode. Each call would add the inode to the
in-memory list. This operation would continue endlessly or until truncate
is succeed.
b) If somehow, after some iterations, truncate is succeed, ext3_orphan_del
will only remove the inode from in-memory list just 1 time. This will trigger
j_assert during put super.
This patch handles both the problems. If truncate fails, first in-memory
list is cleared and than the partition is mounted as read only.
Failure to obtain journal handle during mount may suggest that journal
device is corrupted.
Signed-off-by: Ashish Sangwan <redacted>
Signed-off-by: Namjae Jeon <redacted>
---
fs/ext3/super.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index bd60e08..798cd6f 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1540,7 +1540,22 @@ static void ext3_orphan_cleanup (struct super_block * sb,
jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
inode->i_ino, inode->i_size);
ext3_truncate(inode);
- nr_truncates++;
+ if (list_empty(&EXT3_I(inode)->i_orphan)) {
+ nr_truncates++;
+ } else {
+ /* Remove inode from in-memory orphan list */
+ list_del_init(&EXT3_I(inode)->i_orphan);
+ ext3_msg(sb, KERN_ERR, "Truncate failed for "
+ "orphan inode = %lu. Running e2fsck"
+ " is recommended", inode->i_ino);
+ if (!(s_flags & MS_RDONLY)) {
+ ext3_msg(sb, KERN_INFO, "FS would be"
+ " mounted as readonly");
+ s_flags |= MS_RDONLY;
+ }
+ break;
+ }
+
} else {
printk(KERN_DEBUG
"%s: deleting unreferenced inode %lu\n",--
1.7.11.4