From 87ee8668e333079d49b2dc8c97c33dfeed7a569e Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@newdream.net>
Date: Wed, 13 Aug 2008 10:33:12 -0700
Subject: [PATCH] mds: root snaprealm starts with seq 1

---
 src/TODO              | 4 ++++
 src/mds/MDCache.cc    | 3 ++-
 src/mds/SnapServer.cc | 2 +-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/TODO b/src/TODO
index 3313d6118aeb2..dd87cca1d943d 100644
--- a/src/TODO
+++ b/src/TODO
@@ -34,6 +34,10 @@ snaps on osd
 - garbage collection
 - efficient recovery of clones
 
+snaps on kclient
+- cap import
+- replace mdsc->lock with a mutex
+  - snaprealm mutex, too!  with another weird inversion/acquisition lameness in check_caps, too.
 
 userspace client
 - handle session STALE
diff --git a/src/mds/MDCache.cc b/src/mds/MDCache.cc
index bf117ac92d55c..58a42cfdeeb49 100644
--- a/src/mds/MDCache.cc
+++ b/src/mds/MDCache.cc
@@ -225,8 +225,9 @@ CInode *MDCache::create_root_inode()
   root->inode_auth = pair<int,int>(0, CDIR_AUTH_UNKNOWN);
 
   root->open_snaprealm();  // empty snaprealm
+  root->snaprealm->seq = 1;
   
-  add_inode( root );
+  add_inode(root);
 
   return root;
 }
diff --git a/src/mds/SnapServer.cc b/src/mds/SnapServer.cc
index d6eb9a4259890..fe0f5aca4e6e8 100644
--- a/src/mds/SnapServer.cc
+++ b/src/mds/SnapServer.cc
@@ -34,7 +34,7 @@ void SnapServer::init_inode()
 
 void SnapServer::reset_state()
 {
-  last_snap = 0;
+  last_snap = 1;  /* snapid 1 reserved for initial root snaprealm */
   snaps.clear();
   pending_purge.clear();
 }
-- 
2.39.5