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authorJoseph Qi <joseph.qi@huawei.com>2015-09-05 01:44:40 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-05 02:54:41 +0300
commitad694821224634d46b6571f0161e85ac2e397396 (patch)
tree0aba23e4b8889402d1d1c1e96a62e790574c96ec /fs/ocfs2/inode.c
parentf57a22ddecd6f26040a67e2c12880f98f88b6e00 (diff)
downloadlinux-ad694821224634d46b6571f0161e85ac2e397396.tar.xz
ocfs2: fix race between crashed dio and rm
There is a race case between crashed dio and rm, which will lead to OCFS2_VALID_FL not set read-only. N1 N2 ------------------------------------------------------------------------ dd with direct flag rm file crashed with an dio entry left in orphan dir clear OCFS2_VALID_FL in ocfs2_remove_inode recover N1 and read the corrupted inode, and set filesystem read-only So we skip the inode deletion this time and wait for dio entry recovered first. Signed-off-by: Joseph Qi <joseph.qi@huawei.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/inode.c')
-rw-r--r--fs/ocfs2/inode.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 7868f7e7c455..fe4b3f7db245 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -971,6 +971,7 @@ static void ocfs2_delete_inode(struct inode *inode)
int wipe, status;
sigset_t oldset;
struct buffer_head *di_bh = NULL;
+ struct ocfs2_dinode *di = NULL;
trace_ocfs2_delete_inode(inode->i_ino,
(unsigned long long)OCFS2_I(inode)->ip_blkno,
@@ -1025,6 +1026,14 @@ static void ocfs2_delete_inode(struct inode *inode)
goto bail_unlock_nfs_sync;
}
+ di = (struct ocfs2_dinode *)di_bh->b_data;
+ /* Skip inode deletion and wait for dio orphan entry recovered
+ * first */
+ if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
+ ocfs2_cleanup_delete_inode(inode, 0);
+ goto bail_unlock_inode;
+ }
+
/* Query the cluster. This will be the final decision made
* before we go ahead and wipe the inode. */
status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);