gfs2_atomic_open(): fix O_EXCL|O_CREAT handling on cold dcache
with the way fs/namei.c:do_last() had been done, ->atomic_open()
instances needed to recognize the case when existing file got
found with O_EXCL|O_CREAT, either by falling back to finish_no_open()
or failing themselves. gfs2 one didn't.
Fixes: 6d4ade986f9c (GFS2: Add atomic_open support)
Cc: stable@kernel.org # v3.11
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 2716d56..8294851 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -1248,7 +1248,7 @@
if (!(file->f_mode & FMODE_OPENED))
return finish_no_open(file, d);
dput(d);
- return 0;
+ return excl && (flags & O_CREAT) ? -EEXIST : 0;
}
BUG_ON(d != NULL);
