From: Matt Benjamin <mbenjamin@redhat.com>
Date: Wed, 22 Feb 2017 19:57:59 +0000 (-0500)
Subject: rgw_file: rgw_lookup: don't ref for "/" or ".."
X-Git-Tag: v11.2.1~16^2~7
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=f97ab40539385494f9d4a66806c2bfc08d3654bb;p=ceph.git

rgw_file: rgw_lookup: don't ref for "/" or ".."

These refs won't be returned by nfs-ganesha, and are sufficiently
magical that other consumers should be persuaded to understand
their specialness.

Fixes: http://tracker.ceph.com/issues/19060

Signed-off-by: Matt Benjamin <mbenjamin@redhat.com>
(cherry picked from commit dea8d1ee373399a21851690a9753388b659b8ede)
---

diff --git a/src/rgw/rgw_file.cc b/src/rgw/rgw_file.cc
index b4389c745e1..b96945b0441 100644
--- a/src/rgw/rgw_file.cc
+++ b/src/rgw/rgw_file.cc
@@ -1432,9 +1432,10 @@ int rgw_lookup(struct rgw_fs *rgw_fs,
   LookupFHResult fhr;
 
   if (parent->is_root()) {
-    /* special: lookup on root itself */
-    if (strcmp(path, "/") == 0) {
-      rgw_fh = fs->ref(parent);
+    /* special: parent lookup--note lack of ref()! */
+    if (unlikely((strcmp(path, "..") == 0) ||
+		 (strcmp(path, "/") == 0))) {
+      rgw_fh = parent;
     } else {
       fhr = fs->stat_bucket(parent, path, RGWFileHandle::FLAG_NONE);
       rgw_fh = get<0>(fhr);