From 52c34af5f4814b0b85efdc3c4d23638b6ca5514c Mon Sep 17 00:00:00 2001
From: Raghavendra G <raghavendra@gluster.com>
Date: Sun, 23 Aug 2009 22:35:36 +0000
Subject: performance/stat-prefetch: implement sp_rename.

Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 221 (stat prefetch implementation)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=221
---
 doc/stat-prefetch-design.txt                       | 13 +++--
 .../performance/stat-prefetch/src/stat-prefetch.c  | 55 ++++++++++++++++++++++
 2 files changed, 65 insertions(+), 3 deletions(-)

diff --git a/doc/stat-prefetch-design.txt b/doc/stat-prefetch-design.txt
index 13abc52976a..6328875ac87 100644
--- a/doc/stat-prefetch-design.txt
+++ b/doc/stat-prefetch-design.txt
@@ -89,9 +89,16 @@ fops to be implemented:
  
 * rename
   1. remove entry corresponding to oldname from cache stored in fd contexts of 
-     old parent directory.
-  2. remove entry corresponding to new parent directory from cache stored in
-     fd contexts of its parent directory.
+     oldparent.
+  2. remove entry corresponding to newname from cache stored in fd contexts of
+     newparent. 
+  3. remove entry corresponding to oldparent from cache stored in 
+     old-grand-parent.
+  4. remove entry corresponding to newparent from cache stored in 
+     new-grand-parent.
+  5. if oldname happens to be a directory, remove entire cache from all fds 
+     opened on it.
+
 
 * create/mknod/mkdir/symlink/link
   Delete entry corresponding to basename of directory in which these operations 
diff --git a/xlators/performance/stat-prefetch/src/stat-prefetch.c b/xlators/performance/stat-prefetch/src/stat-prefetch.c
index a5f8dbff79f..c364fa77c56 100644
--- a/xlators/performance/stat-prefetch/src/stat-prefetch.c
+++ b/xlators/performance/stat-prefetch/src/stat-prefetch.c
@@ -1388,6 +1388,60 @@ unwind:
 }
 
 
+int32_t
+sp_rename (call_frame_t *frame, xlator_t *this, loc_t *oldloc,loc_t *newloc)
+{
+        sp_cache_t *cache = NULL;
+        int32_t     ret   = -1;
+
+        GF_VALIDATE_OR_GOTO (this->name, oldloc, unwind);
+        GF_VALIDATE_OR_GOTO (this->name, oldloc->path, unwind);
+        GF_VALIDATE_OR_GOTO (this->name, oldloc->name, unwind);
+        GF_VALIDATE_OR_GOTO (this->name, oldloc->parent, unwind);
+        GF_VALIDATE_OR_GOTO (this->name, oldloc->inode, unwind);
+
+        GF_VALIDATE_OR_GOTO (this->name, newloc, unwind);
+        GF_VALIDATE_OR_GOTO (this->name, newloc->path, unwind);
+        GF_VALIDATE_OR_GOTO (this->name, newloc->name, unwind);
+        GF_VALIDATE_OR_GOTO (this->name, newloc->parent, unwind);
+        GF_VALIDATE_OR_GOTO (this->name, newloc->inode, unwind);
+
+        cache = sp_get_cache_inode (this, oldloc->parent, frame->root->pid);
+        if (cache) {
+                sp_cache_remove_entry (cache, (char *)oldloc->name, 0);
+        }
+
+        cache = sp_get_cache_inode (this, newloc->parent, frame->root->pid);
+        if (cache) {
+                sp_cache_remove_entry (cache, (char *)newloc->name, 0);
+        }
+
+        ret = sp_cache_remove_parent_entry (frame, this, (char *)oldloc->path);
+        if (ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "out of memory");
+                goto unwind;
+        }
+
+        ret = sp_cache_remove_parent_entry (frame, this, (char *)newloc->path);
+        if (ret == -1) {
+                gf_log (this->name, GF_LOG_ERROR, "out of memory");
+                goto unwind;
+        }
+
+        if (S_ISDIR (oldloc->inode->st_mode)) {
+                sp_remove_caches_from_all_fds_opened (this, oldloc->inode);
+        }
+
+        STACK_WIND (frame, sp_stbuf_cbk, FIRST_CHILD(this),
+                    FIRST_CHILD(this)->fops->rename, oldloc, newloc);
+        return 0;
+
+unwind:
+        SP_STACK_UNWIND (frame, -1, errno, NULL);
+	return 0;
+}
+
+
 int32_t
 sp_forget (xlator_t *this, inode_t *inode)
 {
@@ -1452,6 +1506,7 @@ struct xlator_fops fops = {
         .readv     = sp_readv,
         .writev    = sp_writev, 
         .fsync     = sp_fsync,
+        .rename    = sp_rename,
 };
 
 struct xlator_mops mops = {
-- 
cgit