ocfs2: fix a tiny race when truncate dio orohaned entry
Once dio crashed it will leave an entry in orphan dir. And orphan scan
will take care of the clean up. There is a tiny race case that the same
entry will be truncated twice and then trigger the BUG in
ocfs2_del_inode_from_orphan.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index f906a25..395f4b3 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -925,13 +925,23 @@
int update_isize = written > 0 ? 1 : 0;
loff_t end = update_isize ? offset + written : 0;
- tmp_ret = ocfs2_del_inode_from_orphan(osb, inode,
+ tmp_ret = ocfs2_inode_lock(inode, &di_bh, 1);
+ if (tmp_ret < 0) {
+ ret = tmp_ret;
+ mlog_errno(ret);
+ goto out;
+ }
+
+ tmp_ret = ocfs2_del_inode_from_orphan(osb, inode, di_bh,
update_isize, end);
if (tmp_ret < 0) {
ret = tmp_ret;
+ mlog_errno(ret);
goto out;
}
+ ocfs2_inode_unlock(inode, 1);
+
tmp_ret = jbd2_journal_force_commit(journal);
if (tmp_ret < 0) {
ret = tmp_ret;