Merge pull request #1741 from ceph/wip-early-reply

Wip early reply

diff --cc src/mds/MDCache.cc
Simple merge

diff --cc src/mds/MDCache.h
Simple merge

diff --cc src/mds/Mutation.h
Simple merge

diff --cc src/mds/Server.cc
index 672d6ee57d6a37e7a5bbac009777ba46eb094033,6e30744ccee475659e40ce46279dfcba95007572..c8a3ebc50cfea041fb463481824353f807a19f31
--- 1/src/mds/Server.cc
--- 2/src/mds/Server.cc
+++ b/src/mds/Server.cc
@@@ -4423,13 -4453,16 +4426,12 @@@ void Server::_link_remote_finish(MDRequ
  
    mdr->apply();
  
+   MDRequestRef null_ref;
    if (inc)
-     mds->mdcache->send_dentry_link(dn);
-   else {
-     MDRequestRef null_ref;
+     mds->mdcache->send_dentry_link(dn, null_ref);
+   else
      mds->mdcache->send_dentry_unlink(dn, NULL, null_ref);
-   }
    
 -  // commit anchor update?
 -  if (mdr->more()->dst_reanchor_atid) 
 -    mds->anchorclient->commit(mdr->more()->dst_reanchor_atid, mdr->ls);
 -
    // bump target popularity
    mds->balancer->hit_inode(mdr->now, targeti, META_POP_IWR);
    mds->balancer->hit_dir(mdr->now, dn->get_dir(), META_POP_IWR);