From: Greg Farnum <greg@inktank.com>
Date: Tue, 8 Jul 2014 23:21:34 +0000 (-0700)
Subject: MDS: CInode: add a fetch_backtrace() utility function
X-Git-Tag: v0.89~50^2~28
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=aed1498922843f53e3156df7909642d28a22105b;p=ceph.git

MDS: CInode: add a fetch_backtrace() utility function

Expose MDCache::fetch_backtrace and call it from the CInode context.

Signed-off-by: Greg Farnum <greg@inktank.com>
---

diff --git a/src/mds/CInode.cc b/src/mds/CInode.cc
index 175cfc3926e..bb7914bb4e5 100644
--- a/src/mds/CInode.cc
+++ b/src/mds/CInode.cc
@@ -1113,6 +1113,17 @@ void CInode::_stored_backtrace(version_t v, Context *fin)
     fin->complete(0);
 }
 
+void CInode::fetch_backtrace(Context *fin, bufferlist *backtrace)
+{
+  int64_t pool;
+  if (is_dir())
+    pool = mdcache->mds->mdsmap->get_metadata_pool();
+  else
+    pool = inode.layout.fl_pg_pool;
+
+  mdcache->fetch_backtrace(inode.ino, pool, *backtrace, fin);
+}
+
 void CInode::_mark_dirty_parent(LogSegment *ls, bool dirty_pool)
 {
   if (!state_test(STATE_DIRTYPARENT)) {
diff --git a/src/mds/CInode.h b/src/mds/CInode.h
index 2162820ed24..f01b5977aef 100644
--- a/src/mds/CInode.h
+++ b/src/mds/CInode.h
@@ -547,6 +547,7 @@ public:
   void build_backtrace(int64_t pool, inode_backtrace_t& bt);
   void store_backtrace(MDSInternalContextBase *fin, int op_prio=-1);
   void _stored_backtrace(version_t v, Context *fin);
+  void fetch_backtrace(Context *fin, bufferlist *backtrace);
   void _mark_dirty_parent(LogSegment *ls, bool dirty_pool=false);
   void clear_dirty_parent();
   bool is_dirty_parent() { return state_test(STATE_DIRTYPARENT); }
diff --git a/src/mds/MDCache.h b/src/mds/MDCache.h
index 9f02b3ba31f..a5a61311d4e 100644
--- a/src/mds/MDCache.h
+++ b/src/mds/MDCache.h
@@ -864,9 +864,11 @@ public:
 	dn->get_dir()->get_inode()->is_stray())
       eval_stray(dn, delay);
   }
+
+  void fetch_backtrace(inodeno_t ino, int64_t pool, bufferlist& bl, Context *fin);
+
 protected:
   void scan_stray_dir(dirfrag_t next=dirfrag_t());
-  void fetch_backtrace(inodeno_t ino, int64_t pool, bufferlist& bl, Context *fin);
   void purge_stray(CDentry *dn);
   void _purge_stray_purged(CDentry *dn, int r=0);
   void _purge_stray_logged(CDentry *dn, version_t pdv, LogSegment *ls);