From: Yan, Zheng <zyan@redhat.com>
Date: Tue, 23 Dec 2014 07:09:38 +0000 (+0800)
Subject: mds: avoid sending snaptrace for snapshot inodes
X-Git-Tag: v0.93~87^2~19
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=d8e3ce8a1fc0a79273a61104d7b38025a3448abd;p=ceph.git

mds: avoid sending snaptrace for snapshot inodes

snapshot information in snaptrace is only used by head inodes

Signed-off-by: Yan, Zheng <zyan@redhat.com>
---

diff --git a/src/mds/Server.cc b/src/mds/Server.cc
index 3af913259ad8..c36e40029068 100644
--- a/src/mds/Server.cc
+++ b/src/mds/Server.cc
@@ -1152,13 +1152,15 @@ void Server::set_trace_dist(Session *session, MClientReply *reply,
   //assert((bool)dn == (bool)dentry_wanted);  // not true for snapshot lookups
 
   // realm
-  SnapRealm *realm = 0;
-  if (in)
-    realm = in->find_snaprealm();
-  else
-    realm = dn->get_dir()->get_inode()->find_snaprealm();
-  reply->snapbl = realm->get_snap_trace();
-  dout(10) << "set_trace_dist snaprealm " << *realm << " len=" << reply->snapbl.length() << dendl;
+  if (snapid == CEPH_NOSNAP) {
+    SnapRealm *realm;
+    if (in)
+      realm = in->find_snaprealm();
+    else
+      realm = dn->get_dir()->get_inode()->find_snaprealm();
+    reply->snapbl = realm->get_snap_trace();
+    dout(10) << "set_trace_dist snaprealm " << *realm << " len=" << reply->snapbl.length() << dendl;
+  }
 
   // dir + dentry?
   if (dn) {