From: Yan, Zheng <zyan@redhat.com>
Date: Wed, 27 Sep 2017 14:19:06 +0000 (+0800)
Subject: mds: make sure snap inode's last matches its parent dentry's last
X-Git-Tag: v12.2.2~91^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=06c31a6ceecf1c33e1456c746169961802903001;p=ceph.git

mds: make sure snap inode's last matches its parent dentry's last

This patch is for luminous only. The issue has been fixed in master
branch in another way (change is much bigger)

Fixes: http://tracker.ceph.com/issues/21337
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
---

diff --git a/src/mds/MDCache.cc b/src/mds/MDCache.cc
index e6600dbd4ea7..db5733e96653 100644
--- a/src/mds/MDCache.cc
+++ b/src/mds/MDCache.cc
@@ -1680,7 +1680,7 @@ void MDCache::journal_cow_dentry(MutationImpl *mut, EMetaBlob *metablob,
       mut->add_cow_inode(oldin);
       if (pcow_inode)
 	*pcow_inode = oldin;
-      CDentry *olddn = dn->dir->add_primary_dentry(dn->name, oldin, oldfirst, follows);
+      CDentry *olddn = dn->dir->add_primary_dentry(dn->name, oldin, oldfirst, oldin->last);
       oldin->inode.version = olddn->pre_dirty();
       dout(10) << " olddn " << *olddn << dendl;
       bool need_snapflush = !oldin->client_snap_caps.empty();