From: Sage Weil <sage@newdream.net>
Date: Thu, 3 Mar 2011 21:44:35 +0000 (-0800)
Subject: ceph: no .snap inside of snapped namespace
X-Git-Tag: Ubuntu-goldfish-3.4.0-4.27~4091^2
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=455cec0abff563574cca432ced49f734117ca113;p=mirror_ubuntu-zesty-kernel.git

ceph: no .snap inside of snapped namespace

Otherwise you can do things like

# mkdir .snap/foo
# cd .snap/foo/.snap
# ls
<badness>

Signed-off-by: Sage Weil <sage@newdream.net>
---

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 196fd4c62db7..099a58615b90 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -496,6 +496,7 @@ struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
 
 	/* .snap dir? */
 	if (err == -ENOENT &&
+	    ceph_snap(parent) == CEPH_NOSNAP &&
 	    strcmp(dentry->d_name.name,
 		   fsc->mount_options->snapdir_name) == 0) {
 		struct inode *inode = ceph_get_snapdir(parent);