From d69f3dd327730a61b614c9f41f6155626bc07686 Mon Sep 17 00:00:00 2001
From: Greg Farnum <gregf@hq.newdream.net>
Date: Mon, 6 Dec 2010 12:49:40 -0800
Subject: [PATCH] MDS: Encode a full ancestor trace on inodes, not just the
 immediate parent.

---
 src/mds/CInode.cc | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/mds/CInode.cc b/src/mds/CInode.cc
index 401530d8da1a3..2ec8310b4317a 100644
--- a/src/mds/CInode.cc
+++ b/src/mds/CInode.cc
@@ -1001,12 +1001,17 @@ void CInode::encode_parent_mutation(ObjectOperation& m)
   CDentry *pdn = get_parent_dn();
   if (pdn) {
     bufferlist parent(32 + pdn->name.length());
-    uint64_t ino = pdn->get_dir()->get_inode()->ino();
-    __u8 v = 1;
+    __u8 v = 2;
     ::encode(v, parent);
-    ::encode(inode.version, parent);
-    ::encode(ino, parent);
-    ::encode(pdn->name, parent);
+    while (pdn) {
+      uint64_t ino = pdn->get_dir()->get_inode()->ino();
+      ::encode(inode.version, parent);
+      ::encode(ino, parent);
+      ::encode(pdn->name, parent);
+      pdn = (pdn->get_linkage() && pdn->get_linkage()->get_inode())?
+                pdn->get_linkage()->get_inode()->get_parent_dn()
+                : NULL;
+    }
     m.setxattr("parent", parent);
   }
 }
-- 
2.39.5