From: Yan, Zheng <zyan@redhat.com>
Date: Wed, 10 Dec 2014 08:17:31 +0000 (+0800)
Subject: ceph: fix mksnap crash
X-Git-Tag: v3.19-rc1~40^2~1
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=275dd19ea4e84c34f985ba097f9cddb539f54a50;p=linux.git

ceph: fix mksnap crash

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@redhat.com>
Reviewed-by: Sage Weil <sage@redhat.com>
---

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 652619950fa9..fcfd0abc8c38 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: