From 07f580977319110cbdd60c78fff892c85711ef3e Mon Sep 17 00:00:00 2001
From: "Yan, Zheng" <zyan@redhat.com>
Date: Wed, 24 Jun 2015 11:21:23 +0800
Subject: [PATCH] client: convert Dentry::inode to smart pointer

Signed-off-by: Yan, Zheng <zyan@redhat.com>
---
 src/client/Client.cc           | 15 +++++++--------
 src/client/Dentry.h            | 11 ++++++-----
 src/tools/ceph-client-debug.cc |  2 +-
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/src/client/Client.cc b/src/client/Client.cc
index 168eb37d52f61..c477748236d1d 100644
--- a/src/client/Client.cc
+++ b/src/client/Client.cc
@@ -324,7 +324,7 @@ void Client::dump_inode(Formatter *f, Inode *in, set<Inode*>& did, bool disconne
 	f->close_section();
       }	
       if (it->second->inode)
-	dump_inode(f, it->second->inode, did, false);
+	dump_inode(f, it->second->inode.get(), did, false);
     }
   }
 }
@@ -894,7 +894,7 @@ Dentry *Client::insert_dentry_inode(Dir *dir, const string& dname, LeaseStat *dl
     }
   }
   
-  if (!dn || dn->inode == 0) {
+  if (!dn || !dn->inode) {
     in->get();
     if (old_dentry) {
       if (old_dentry->dir != dir) {
@@ -1253,7 +1253,7 @@ mds_rank_t Client::choose_target_mds(MetaRequest *req)
     }
   } else if (de) {
     if (de->inode) {
-      in = de->inode;
+      in = de->inode.get();
       ldout(cct, 20) << "choose_target_mds starting with req->dentry inode " << *in << dendl;
     } else {
       in = de->dir->parent_inode;
@@ -2647,7 +2647,6 @@ Dentry* Client::link(Dir *dir, const string& name, Inode *in, Dentry *dn)
 
   if (in) {    // link to inode
     dn->inode = in;
-    in->get();
     if (in->is_dir()) {
       if (in->dir)
 	dn->get(); // dir -> dn pin
@@ -2674,13 +2673,14 @@ Dentry* Client::link(Dir *dir, const string& name, Inode *in, Dentry *dn)
 
 void Client::unlink(Dentry *dn, bool keepdir, bool keepdentry)
 {
-  Inode *in = dn->inode;
+  InodeRef in;
+  in.swap(dn->inode);
   ldout(cct, 15) << "unlink dir " << dn->dir->parent_inode << " '" << dn->name << "' dn " << dn
 		 << " inode " << dn->inode << dendl;
 
   // unlink from inode
   if (in) {
-    invalidate_quota_tree(in);
+    invalidate_quota_tree(in.get());
     if (in->is_dir()) {
       if (in->dir)
 	dn->put(); // dir -> dn pin
@@ -2691,7 +2691,6 @@ void Client::unlink(Dentry *dn, bool keepdir, bool keepdentry)
     assert(in->dn_set.count(dn));
     in->dn_set.erase(dn);
     ldout(cct, 20) << "unlink  inode " << in << " parents now " << in->dn_set << dendl; 
-    put_inode(in);
   }
 
   if (keepdentry) {
@@ -6344,7 +6343,7 @@ int Client::readdir_r_cb(dir_result_t *d, add_dirent_cb_t cb, void *p)
   if (dirp->offset == 1) {
     ldout(cct, 15) << " including .." << dendl;
     if (!diri->dn_set.empty()) {
-      Inode* in = diri->get_first_parent()->inode;
+      InodeRef& in = diri->get_first_parent()->inode;
       fill_dirent(&de, "..", S_IFDIR, in->ino, 2);
       fill_stat(in, &st);
     } else {
diff --git a/src/client/Dentry.h b/src/client/Dentry.h
index aad6343f8179f..198b375ce0988 100644
--- a/src/client/Dentry.h
+++ b/src/client/Dentry.h
@@ -5,17 +5,18 @@
 #include "include/xlist.h"
 
 #include "mds/mdstypes.h"
+#include "InodeRef.h"
 
 class Dir;
 struct Inode;
 
 class Dentry : public LRUObject {
  public:
-  string  name;                      // sort of lame
+  string   name;                      // sort of lame
   //const char *name;
-  Dir     *dir;
-  Inode   *inode;
-  int     ref;                       // 1 if there's a dir beneath me.
+  Dir	   *dir;
+  InodeRef inode;
+  int	   ref;                       // 1 if there's a dir beneath me.
   uint64_t offset;
   mds_rank_t lease_mds;
   utime_t lease_ttl;
@@ -47,7 +48,7 @@ class Dentry : public LRUObject {
   void dump(Formatter *f) const;
 
   Dentry() :
-    dir(0), inode(0), ref(1), offset(0),
+    dir(0), ref(1), offset(0),
     lease_mds(-1), lease_gen(0), lease_seq(0), cap_shared_gen(0),
     item_dentry_list(this)  { }
 private:
diff --git a/src/tools/ceph-client-debug.cc b/src/tools/ceph-client-debug.cc
index 2ed93326b4433..a84cadcf69db7 100644
--- a/src/tools/ceph-client-debug.cc
+++ b/src/tools/ceph-client-debug.cc
@@ -163,7 +163,7 @@ int main(int argc, const char **argv)
   // Release Inode references
   ceph_ll_forget(client, ino, 1);
   for (std::vector<Dentry*>::reverse_iterator p = path.rbegin(); p != path.rend(); ++p) {
-    ceph_ll_forget(client, (*p)->inode, 1);
+    ceph_ll_forget(client, (*p)->inode.get(), 1);
   }
   ino = NULL;
   path.clear();  
-- 
2.39.5