[PATCH] ceph: fix mksnap crash

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mksnap reply only contain 'target', does not contain 'dentry'. So
it's wrong to use req->r_reply_info.head->is_dentry to detect traceless
reply.

Signed-off-by: Yan, Zheng <zyan@xxxxxxxxxx>
---
 fs/ceph/dir.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 6526199..fcfd0ab 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -812,7 +812,9 @@ static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 		acls.pagelist = NULL;
 	}
 	err = ceph_mdsc_do_request(mdsc, dir, req);
-	if (!err && !req->r_reply_info.head->is_dentry)
+	if (!err &&
+	    !req->r_reply_info.head->is_target &&
+	    !req->r_reply_info.head->is_dentry)
 		err = ceph_handle_notrace_create(dir, dentry);
 	ceph_mdsc_put_request(req);
 out:
-- 
1.9.3

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