Global: NFS-friendly prototype changes

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

BUG: 145 (NFSv3 related additions to 2.1 task list)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=145

18 files changed, 809 insertions, 204 deletions

diff --git a/xlators/cluster/afr/src/afr-dir-write.c b/xlators/cluster/afr/src/afr-dir-write.c
index 51629234f..5cd05b138 100644
--- a/xlators/cluster/afr/src/afr-dir-write.c
+++ b/xlators/cluster/afr/src/afr-dir-write.c
@@ -115,7 +115,8 @@ afr_create_unwind (call_frame_t *frame, xlator_t *this)
 int
 afr_create_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
 		     int32_t op_ret, int32_t op_errno, 
-		     fd_t *fd, inode_t *inode, struct stat *buf)
+		     fd_t *fd, inode_t *inode, struct stat *buf,
+                     struct stat *preparent, struct stat *postparent)
 {
 	afr_local_t *   local = NULL;
 	afr_private_t * priv  = NULL;
@@ -366,9 +367,10 @@ afr_mknod_unwind (call_frame_t *frame, xlator_t *this)
 
 
 int
-afr_mknod_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
-		    int32_t op_ret, int32_t op_errno, 
-		    inode_t *inode, struct stat *buf)
+afr_mknod_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                    int32_t op_ret, int32_t op_errno, inode_t *inode,
+                    struct stat *buf, struct stat *preparent,
+                    struct stat *postparent)
 {
 	afr_local_t *   local = NULL;
 	afr_private_t * priv  = NULL;
@@ -601,9 +603,10 @@ afr_mkdir_unwind (call_frame_t *frame, xlator_t *this)
 
 
 int
-afr_mkdir_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
-		    int32_t op_ret, int32_t op_errno, 
-		    inode_t *inode, struct stat *buf)
+afr_mkdir_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                    int32_t op_ret, int32_t op_errno, inode_t *inode,
+                    struct stat *buf, struct stat *preparent,
+                    struct stat *postparent)
 {
 	afr_local_t *   local = NULL;
 	afr_private_t * priv  = NULL;
@@ -840,7 +843,8 @@ afr_link_unwind (call_frame_t *frame, xlator_t *this)
 int
 afr_link_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
 		   int32_t op_ret, int32_t op_errno, inode_t *inode,
-		   struct stat *buf)
+                   struct stat *buf, struct stat *preparent,
+                   struct stat *postparent)
 {
 	afr_local_t *   local = NULL;
 	afr_private_t * priv  = NULL;
@@ -1065,7 +1069,8 @@ afr_symlink_unwind (call_frame_t *frame, xlator_t *this)
 int
 afr_symlink_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
 		      int32_t op_ret, int32_t op_errno, inode_t *inode,
-		      struct stat *buf)
+                      struct stat *buf, struct stat *preparent,
+                      struct stat *postparent)
 {
 	afr_local_t *   local = NULL;
 	afr_private_t * priv  = NULL;
@@ -1297,7 +1302,9 @@ afr_rename_unwind (call_frame_t *frame, xlator_t *this)
 
 int
 afr_rename_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
-		     int32_t op_ret, int32_t op_errno, struct stat *buf)
+		     int32_t op_ret, int32_t op_errno, struct stat *buf,
+                     struct stat *preoldparent, struct stat *postoldparent,
+                     struct stat *prenewparent, struct stat *postnewparent)
 {
 	afr_local_t *   local = NULL;
 	afr_private_t * priv  = NULL;
@@ -1496,7 +1503,8 @@ afr_unlink_unwind (call_frame_t *frame, xlator_t *this)
 
 int
 afr_unlink_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
-		     int32_t op_ret, int32_t op_errno)
+		     int32_t op_ret, int32_t op_errno, struct stat *preparent,
+                     struct stat *postparent)
 {
 	afr_local_t *   local = NULL;
 	afr_private_t * priv  = NULL;
@@ -1683,7 +1691,8 @@ afr_rmdir_unwind (call_frame_t *frame, xlator_t *this)
 
 int
 afr_rmdir_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
-		    int32_t op_ret, int32_t op_errno)
+		    int32_t op_ret, int32_t op_errno, struct stat *preparent,
+                    struct stat *postparent)
 {
 	afr_local_t *   local = NULL;
 	afr_private_t * priv  = NULL;
diff --git a/xlators/cluster/afr/src/afr-inode-read.c b/xlators/cluster/afr/src/afr-inode-read.c
index 203206511..8c0431f5a 100644
--- a/xlators/cluster/afr/src/afr-inode-read.c
+++ b/xlators/cluster/afr/src/afr-inode-read.c
@@ -428,7 +428,7 @@ out:
 int32_t
 afr_readlink_cbk (call_frame_t *frame, void *cookie,
 		  xlator_t *this, int32_t op_ret, int32_t op_errno,
-		  const char *buf)
+		  const char *buf, struct stat *sbuf)
 {
 	afr_private_t * priv     = NULL;
 	afr_local_t *   local    = NULL;
diff --git a/xlators/cluster/afr/src/afr-inode-write.c b/xlators/cluster/afr/src/afr-inode-write.c
index 591f7cd49..601913a0f 100644
--- a/xlators/cluster/afr/src/afr-inode-write.c
+++ b/xlators/cluster/afr/src/afr-inode-write.c
@@ -88,7 +88,8 @@ afr_writev_unwind (call_frame_t *frame, xlator_t *this)
 
 int
 afr_writev_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
-		     int32_t op_ret, int32_t op_errno, struct stat *buf)
+		     int32_t op_ret, int32_t op_errno, struct stat *prebuf,
+                     struct stat *postbuf)
 {
 	afr_local_t *   local = NULL;
 	afr_private_t * priv  = NULL;
@@ -115,11 +116,11 @@ afr_writev_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 		if (op_ret != -1) {
 			if (local->success_count == 0) {
 				local->op_ret   = op_ret;
-				local->cont.writev.buf = *buf;
+				local->cont.writev.buf = *postbuf;
 			}
 
                         if (child_index == read_child) {
-                                local->cont.writev.read_child_buf = *buf;
+                                local->cont.writev.read_child_buf = *postbuf;
                         }
 
 			local->success_count++;
@@ -323,7 +324,8 @@ afr_truncate_unwind (call_frame_t *frame, xlator_t *this)
 
 int
 afr_truncate_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
-		       int32_t op_ret, int32_t op_errno, struct stat *buf)
+		       int32_t op_ret, int32_t op_errno, struct stat *prebuf,
+                       struct stat *postbuf)
 {
 	afr_local_t *   local = NULL;
 	afr_private_t * priv  = NULL;
@@ -350,11 +352,11 @@ afr_truncate_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 		if (op_ret != -1) {
 			if (local->success_count == 0) {
 				local->op_ret = op_ret;
-				local->cont.truncate.buf = *buf;
+				local->cont.truncate.buf = *postbuf;
 			}
 
                         if (child_index == read_child) {
-                                local->cont.truncate.read_child_buf = *buf;
+                                local->cont.truncate.read_child_buf = *postbuf;
                         }
 
 			local->success_count++;
@@ -543,7 +545,8 @@ afr_ftruncate_unwind (call_frame_t *frame, xlator_t *this)
 
 int
 afr_ftruncate_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
-			int32_t op_ret, int32_t op_errno, struct stat *buf)
+			int32_t op_ret, int32_t op_errno, struct stat *prebuf,
+                        struct stat *postbuf)
 {
 	afr_local_t *   local = NULL;
 	afr_private_t * priv  = NULL;
@@ -570,11 +573,11 @@ afr_ftruncate_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 		if (op_ret != -1) {
 			if (local->success_count == 0) {
 				local->op_ret = op_ret;
-				local->cont.ftruncate.buf = *buf;
+				local->cont.ftruncate.buf = *postbuf;
 			}
 
                         if (child_index == read_child) {
-                                local->cont.ftruncate.read_child_buf = *buf;
+                                local->cont.ftruncate.read_child_buf = *postbuf;
                         }
 
 			local->success_count++;
diff --git a/xlators/cluster/afr/src/afr-self-heal-algorithm.c b/xlators/cluster/afr/src/afr-self-heal-algorithm.c
index 46d451913..5197f6be4 100644
--- a/xlators/cluster/afr/src/afr-self-heal-algorithm.c
+++ b/xlators/cluster/afr/src/afr-self-heal-algorithm.c
@@ -55,7 +55,8 @@ sh_full_read_write_iter (call_frame_t *frame, xlator_t *this);
 
 static int
 sh_full_write_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                   int32_t op_ret, int32_t op_errno, struct stat *buf)
+                   int32_t op_ret, int32_t op_errno, struct stat *prebuf,
+                   struct stat *postbuf)
 {
 	afr_private_t * priv = NULL;
 	afr_local_t * local  = NULL;
@@ -281,7 +282,8 @@ sh_diff_iter (call_frame_t *frame, xlator_t *this);
 
 static int
 sh_diff_write_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                   int32_t op_ret, int32_t op_errno, struct stat *buf)
+                   int32_t op_ret, int32_t op_errno, struct stat *buf,
+                   struct stat *postbuf)
 {
 	afr_private_t *   priv  = NULL;
 	afr_local_t *     local = NULL;
diff --git a/xlators/cluster/afr/src/afr-self-heal-common.c b/xlators/cluster/afr/src/afr-self-heal-common.c
index 4a260ed90..ef25204a1 100644
--- a/xlators/cluster/afr/src/afr-self-heal-common.c
+++ b/xlators/cluster/afr/src/afr-self-heal-common.c
@@ -831,7 +831,9 @@ static int
 sh_missing_entries_newentry_cbk (call_frame_t *frame, void *cookie,
 				 xlator_t *this,
 				 int32_t op_ret, int32_t op_errno,
-				 inode_t *inode, struct stat *buf)
+				 inode_t *inode, struct stat *buf,
+                                 struct stat *preparent,
+                                 struct stat *postparent)
 {
 	afr_local_t     *local = NULL;
 	afr_self_heal_t *sh = NULL;
@@ -1044,7 +1046,7 @@ static int
 sh_missing_entries_readlink_cbk (call_frame_t *frame, void *cookie,
 				 xlator_t *this,
 				 int32_t op_ret, int32_t op_errno,
-				 const char *link)
+				 const char *link, struct stat *sbuf)
 {
 	if (op_ret > 0)
 		sh_missing_entries_symlink (frame, this, link);
@@ -1164,7 +1166,8 @@ static int
 sh_missing_entries_lookup_cbk (call_frame_t *frame, void *cookie,
 			       xlator_t *this,
 			       int32_t op_ret, int32_t op_errno,
-			       inode_t *inode, struct stat *buf, dict_t *xattr)
+                               inode_t *inode, struct stat *buf, dict_t *xattr,
+                               struct stat *postparent)
 {
 	int              child_index = 0;
 	afr_local_t     *local = NULL;
diff --git a/xlators/cluster/afr/src/afr-self-heal-data.c b/xlators/cluster/afr/src/afr-self-heal-data.c
index 576a15e06..5300f0a75 100644
--- a/xlators/cluster/afr/src/afr-self-heal-data.c
+++ b/xlators/cluster/afr/src/afr-self-heal-data.c
@@ -395,7 +395,8 @@ afr_sh_data_erase_pending (call_frame_t *frame, xlator_t *this)
 
 int
 afr_sh_data_trim_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-		      int32_t op_ret, int32_t op_errno, struct stat *buf)
+		      int32_t op_ret, int32_t op_errno, struct stat *prebuf,
+                      struct stat *postbuf)
 {
 	afr_private_t * priv = NULL;
 	afr_local_t * local  = NULL;
@@ -600,7 +601,7 @@ afr_sh_data_open (call_frame_t *frame, xlator_t *this)
 			   (void *) (long) source,
 			   priv->children[source],
 			   priv->children[source]->fops->open,
-			   &local->loc, O_RDWR|O_LARGEFILE, fd);
+			   &local->loc, O_RDWR|O_LARGEFILE, fd, 0);
 	call_count--;
 
 	/* open sinks */
@@ -613,7 +614,7 @@ afr_sh_data_open (call_frame_t *frame, xlator_t *this)
 				   priv->children[i], 
 				   priv->children[i]->fops->open,
 				   &local->loc, 
-				   O_RDWR|O_LARGEFILE, fd); 
+				   O_RDWR|O_LARGEFILE, fd, 0); 
 
 		if (!--call_count)
 			break;
@@ -758,7 +759,8 @@ afr_sh_data_fix (call_frame_t *frame, xlator_t *this)
 int
 afr_sh_data_lookup_cbk (call_frame_t *frame, void *cookie,
 			xlator_t *this, int32_t op_ret, int32_t op_errno,
-			inode_t *inode, struct stat *buf, dict_t *xattr)
+                        inode_t *inode, struct stat *buf, dict_t *xattr,
+                        struct stat *postparent)
 {
 	afr_private_t   *priv  = NULL;
 	afr_local_t     *local = NULL;
diff --git a/xlators/cluster/afr/src/afr-self-heal-entry.c b/xlators/cluster/afr/src/afr-self-heal-entry.c
index b3bb67209..fa9384158 100644
--- a/xlators/cluster/afr/src/afr-self-heal-entry.c
+++ b/xlators/cluster/afr/src/afr-self-heal-entry.c
@@ -426,7 +426,9 @@ afr_sh_entry_expunge_entry_done (call_frame_t *frame, xlator_t *this,
 int
 afr_sh_entry_expunge_remove_cbk (call_frame_t *expunge_frame, void *cookie,
 				 xlator_t *this,
-				 int32_t op_ret, int32_t op_errno)
+				 int32_t op_ret, int32_t op_errno,
+                                 struct stat *preparent,
+                                 struct stat *postparent)
 {
 	afr_private_t   *priv = NULL;
 	afr_local_t     *expunge_local = NULL;
@@ -564,7 +566,8 @@ int
 afr_sh_entry_expunge_lookup_cbk (call_frame_t *expunge_frame, void *cookie,
 				xlator_t *this,
 				int32_t op_ret,	int32_t op_errno,
-				inode_t *inode, struct stat *buf, dict_t *x)
+                                inode_t *inode, struct stat *buf, dict_t *x,
+                                struct stat *postparent)
 {
 	afr_private_t   *priv = NULL;
 	afr_local_t     *expunge_local = NULL;
@@ -626,7 +629,8 @@ int
 afr_sh_entry_expunge_entry_cbk (call_frame_t *expunge_frame, void *cookie,
 				xlator_t *this,
 				int32_t op_ret,	int32_t op_errno,
-				inode_t *inode, struct stat *buf, dict_t *x)
+                                inode_t *inode, struct stat *buf, dict_t *x,
+                                struct stat *postparent)
 {
 	afr_private_t   *priv = NULL;
 	afr_local_t     *expunge_local = NULL;
@@ -1021,7 +1025,9 @@ int
 afr_sh_entry_impunge_newfile_cbk (call_frame_t *impunge_frame, void *cookie,
 				  xlator_t *this,
 				  int32_t op_ret, int32_t op_errno,
-				  inode_t *inode, struct stat *stbuf)
+                                  inode_t *inode, struct stat *stbuf,
+                                  struct stat *preparent,
+                                  struct stat *postparent)
 {
 	int              call_count = 0;
 	afr_private_t   *priv = NULL;
@@ -1188,7 +1194,7 @@ int
 afr_sh_entry_impunge_readlink_cbk (call_frame_t *impunge_frame, void *cookie,
 				   xlator_t *this,
 				   int32_t op_ret, int32_t op_errno,
-				   const char *linkname)
+				   const char *linkname, struct stat *sbuf)
 {
 	afr_private_t   *priv = NULL;
 	afr_local_t     *impunge_local = NULL;
@@ -1264,7 +1270,7 @@ afr_sh_entry_impunge_recreate_lookup_cbk (call_frame_t *impunge_frame,
 					  void *cookie, xlator_t *this,
 					  int32_t op_ret, int32_t op_errno,
 					  inode_t *inode, struct stat *buf,
-					  dict_t *xattr)
+					  dict_t *xattr,struct stat *postparent)
 {
 	afr_private_t   *priv = NULL;
 	afr_local_t     *impunge_local = NULL;
@@ -1372,7 +1378,8 @@ int
 afr_sh_entry_impunge_entry_cbk (call_frame_t *impunge_frame, void *cookie,
 				xlator_t *this,
 				int32_t op_ret,	int32_t op_errno,
-				inode_t *inode, struct stat *buf, dict_t *x)
+                                inode_t *inode, struct stat *buf, dict_t *x,
+                                struct stat *postparent)
 {
 	afr_private_t   *priv = NULL;
 	afr_local_t     *impunge_local = NULL;
@@ -1861,7 +1868,8 @@ afr_sh_entry_fix (call_frame_t *frame, xlator_t *this)
 int
 afr_sh_entry_lookup_cbk (call_frame_t *frame, void *cookie,
 			 xlator_t *this, int32_t op_ret, int32_t op_errno,
-			 inode_t *inode, struct stat *buf, dict_t *xattr)
+                         inode_t *inode, struct stat *buf, dict_t *xattr,
+                         struct stat *postparent)
 {
 	afr_private_t   *priv  = NULL;
 	afr_local_t     *local = NULL;
diff --git a/xlators/cluster/afr/src/afr-self-heal-metadata.c b/xlators/cluster/afr/src/afr-self-heal-metadata.c
index 686446b5f..9a02ab6dd 100644
--- a/xlators/cluster/afr/src/afr-self-heal-metadata.c
+++ b/xlators/cluster/afr/src/afr-self-heal-metadata.c
@@ -591,7 +591,8 @@ afr_sh_metadata_fix (call_frame_t *frame, xlator_t *this)
 int
 afr_sh_metadata_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 			    int32_t op_ret, int32_t op_errno,
-			    inode_t *inode, struct stat *buf, dict_t *xattr)
+                            inode_t *inode, struct stat *buf, dict_t *xattr,
+                            struct stat *postparent)
 {
 	afr_local_t     *local = NULL;
 	afr_self_heal_t *sh = NULL;
diff --git a/xlators/cluster/afr/src/afr.c b/xlators/cluster/afr/src/afr.c
index ef93e5078..b65a4dc46 100644
--- a/xlators/cluster/afr/src/afr.c
+++ b/xlators/cluster/afr/src/afr.c
@@ -448,7 +448,8 @@ afr_self_heal_cbk (call_frame_t *frame, xlator_t *this)
 int
 afr_lookup_cbk (call_frame_t *frame, void *cookie,
 		xlator_t *this,	int32_t op_ret,	int32_t op_errno,
-		inode_t *inode,	struct stat *buf, dict_t *xattr)
+                inode_t *inode,	struct stat *buf, dict_t *xattr,
+                struct stat *postparent)
 {
 	afr_local_t *   local = NULL;
 	afr_private_t * priv  = NULL;
@@ -789,7 +790,8 @@ out:
 
 int
 afr_open_ftruncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
-			int32_t op_ret, int32_t op_errno, struct stat *buf)
+			int32_t op_ret, int32_t op_errno, struct stat *prebuf,
+                        struct stat *postbuf)
 {
 	afr_local_t * local = frame->local;
         int ret = 0;
@@ -864,8 +866,8 @@ afr_open_cbk (call_frame_t *frame, void *cookie,
 
 
 int
-afr_open (call_frame_t *frame, xlator_t *this,
-	  loc_t *loc, int32_t flags, fd_t *fd)
+afr_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
+          fd_t *fd, int32_t wbflags)
 {
 	afr_private_t * priv  = NULL;
 	afr_local_t *   local = NULL;
@@ -910,7 +912,7 @@ afr_open (call_frame_t *frame, xlator_t *this,
 			STACK_WIND_COOKIE (frame, afr_open_cbk, (void *) (long) i,
 					   priv->children[i],
 					   priv->children[i]->fops->open,
-					   loc, wind_flags, fd);
+					   loc, wind_flags, fd, wbflags);
 			
 			if (!--call_count)
 				break;
@@ -1152,8 +1154,9 @@ out:
 /* {{{ fsync */
 
 int
-afr_fsync_cbk (call_frame_t *frame, void *cookie,
-	       xlator_t *this, int32_t op_ret, int32_t op_errno)
+afr_fsync_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+               int32_t op_ret, int32_t op_errno, struct stat *prebuf,
+               struct stat *postbuf)
 {
 	afr_local_t *local = NULL;
 	
@@ -1294,7 +1297,7 @@ afr_fsyncdir (call_frame_t *frame, xlator_t *this, fd_t *fd,
 
 	for (i = 0; i < priv->child_count; i++) {
 		if (local->child_up[i]) {
-			STACK_WIND (frame, afr_fsync_cbk,
+			STACK_WIND (frame, afr_fsyncdir_cbk,
 				    priv->children[i],
 				    priv->children[i]->fops->fsyncdir,
 				    fd, datasync);
diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c
index d5d6f4c3e..49af12101 100644
--- a/xlators/cluster/dht/src/dht-common.c
+++ b/xlators/cluster/dht/src/dht-common.c
@@ -79,7 +79,8 @@ dht_lookup_selfheal_cbk (call_frame_t *frame, void *cookie,
 int
 dht_lookup_dir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int op_ret, int op_errno,
-                    inode_t *inode, struct stat *stbuf, dict_t *xattr)
+                    inode_t *inode, struct stat *stbuf, dict_t *xattr,
+                    struct stat *postparent)
 {
 	dht_conf_t   *conf          = NULL;
         dht_local_t  *local         = NULL;
@@ -190,7 +191,8 @@ selfheal:
 int
 dht_revalidate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int op_ret, int op_errno,
-                    inode_t *inode, struct stat *stbuf, dict_t *xattr)
+                    inode_t *inode, struct stat *stbuf, dict_t *xattr,
+                    struct stat *postparent)
 {
         dht_local_t  *local         = NULL;
         int           this_call_cnt = 0;
@@ -308,7 +310,8 @@ int
 dht_lookup_linkfile_create_cbk (call_frame_t *frame, void *cookie,
 				xlator_t *this,
 				int32_t op_ret, int32_t op_errno,
-				inode_t *inode, struct stat *stbuf)
+                                inode_t *inode, struct stat *stbuf,
+                                struct stat *preparent, struct stat *postparent)
 {
 	dht_local_t  *local = NULL;
 	xlator_t     *cached_subvol = NULL;
@@ -345,7 +348,8 @@ unwind:
 int
 dht_lookup_everywhere_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 			   int32_t op_ret, int32_t op_errno,
-			   inode_t *inode, struct stat *buf, dict_t *xattr)
+                           inode_t *inode, struct stat *buf, dict_t *xattr,
+                           struct stat *postparent)
 {
 	dht_conf_t   *conf          = NULL;
         dht_local_t  *local         = NULL;
@@ -521,7 +525,8 @@ dht_lookup_everywhere (call_frame_t *frame, xlator_t *this, loc_t *loc)
 int
 dht_lookup_linkfile_cbk (call_frame_t *frame, void *cookie,
                          xlator_t *this, int op_ret, int op_errno,
-                         inode_t *inode, struct stat *stbuf, dict_t *xattr)
+                         inode_t *inode, struct stat *stbuf, dict_t *xattr,
+                         struct stat *postparent)
 {
         call_frame_t *prev = NULL;
 	dht_local_t  *local = NULL;
@@ -622,7 +627,8 @@ dht_lookup_directory (call_frame_t *frame, xlator_t *this, loc_t *loc)
 int
 dht_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                 int op_ret, int op_errno,
-                inode_t *inode, struct stat *stbuf, dict_t *xattr)
+                inode_t *inode, struct stat *stbuf, dict_t *xattr,
+                struct stat *postparent)
 {
 	dht_layout_t *layout      = NULL;
         char          is_linkfile = 0;
@@ -853,6 +859,48 @@ err:
 
 
 int
+dht_truncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+	      int op_ret, int op_errno, struct stat *prebuf,
+              struct stat *postbuf)
+{
+	dht_local_t  *local = NULL;
+	int           this_call_cnt = 0;
+	call_frame_t *prev = NULL;
+
+
+	local = frame->local;
+	prev = cookie;
+
+	LOCK (&frame->lock);
+	{
+		if (op_ret == -1) {
+			local->op_errno = op_errno;
+			gf_log (this->name, GF_LOG_DEBUG,
+				"subvolume %s returned -1 (%s)",
+				prev->this->name, strerror (op_errno));
+			goto unlock;
+		}
+
+		dht_stat_merge (this, &local->stbuf, prebuf, prev->this);
+
+		if (local->inode)
+			local->stbuf.st_ino = local->inode->ino;
+		local->op_ret = 0;
+	}
+unlock:
+	UNLOCK (&frame->lock);
+
+	this_call_cnt = dht_frame_return (frame);
+	if (is_last_call (this_call_cnt))
+		DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno,
+				  &local->stbuf);
+
+        return 0;
+}
+
+
+
+int
 dht_attr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 	      int op_ret, int op_errno, struct stat *stbuf)
 {
@@ -1031,7 +1079,7 @@ dht_truncate (call_frame_t *frame, xlator_t *this,
 	local->inode = inode_ref (loc->inode);
 	local->call_cnt = 1;
 
-	STACK_WIND (frame, dht_attr_cbk,
+	STACK_WIND (frame, dht_truncate_cbk,
 		    subvol, subvol->fops->truncate,
 		    loc, offset);
 
@@ -1077,7 +1125,7 @@ dht_ftruncate (call_frame_t *frame, xlator_t *this,
 	local->inode = inode_ref (fd->inode);
 	local->call_cnt = 1;
 
-	STACK_WIND (frame, dht_attr_cbk,
+	STACK_WIND (frame, dht_truncate_cbk,
 		    subvol, subvol->fops->ftruncate,
 		    fd, offset);
 
@@ -1092,6 +1140,78 @@ err:
 
 
 int
+dht_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                int op_ret, int op_errno, struct stat *preparent,
+                struct stat *postparent)
+{
+	dht_local_t  *local = NULL;
+	int           this_call_cnt = 0;
+	call_frame_t *prev = NULL;
+
+
+	local = frame->local;
+	prev = cookie;
+
+	LOCK (&frame->lock);
+	{
+		if (op_ret == -1) {
+			local->op_errno = op_errno;
+			gf_log (this->name, GF_LOG_DEBUG,
+				"subvolume %s returned -1 (%s)",
+				prev->this->name, strerror (op_errno));
+			goto unlock;
+		}
+
+		local->op_ret = 0;
+	}
+unlock:
+	UNLOCK (&frame->lock);
+
+	this_call_cnt = dht_frame_return (frame);
+	if (is_last_call (this_call_cnt))
+		DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno);
+
+        return 0;
+}
+
+
+int
+dht_fsync_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int op_ret,
+               int op_errno, struct stat *prebuf, struct stat *postbuf)
+{
+	dht_local_t  *local = NULL;
+	int           this_call_cnt = 0;
+	call_frame_t *prev = NULL;
+
+
+	local = frame->local;
+	prev = cookie;
+
+	LOCK (&frame->lock);
+	{
+		if (op_ret == -1) {
+			local->op_errno = op_errno;
+			gf_log (this->name, GF_LOG_DEBUG,
+				"subvolume %s returned -1 (%s)",
+				prev->this->name, strerror (op_errno));
+			goto unlock;
+		}
+
+		local->op_ret = 0;
+	}
+unlock:
+	UNLOCK (&frame->lock);
+
+	this_call_cnt = dht_frame_return (frame);
+	if (is_last_call (this_call_cnt))
+		DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno);
+
+        return 0;
+}
+
+
+
+int
 dht_err_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 	     int op_ret, int op_errno)
 {
@@ -1175,9 +1295,9 @@ err:
 
 int
 dht_readlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-		  int op_ret, int op_errno, const char *path)
+		  int op_ret, int op_errno, const char *path, struct stat *sbuf)
 {
-        DHT_STACK_UNWIND (frame, op_ret, op_errno, path);
+        DHT_STACK_UNWIND (frame, op_ret, op_errno, path, sbuf);
 
         return 0;
 }
@@ -1397,7 +1517,7 @@ unlock:
 
 int
 dht_open (call_frame_t *frame, xlator_t *this,
-	  loc_t *loc, int flags, fd_t *fd)
+	  loc_t *loc, int flags, fd_t *fd, int wbflags)
 {
 	xlator_t     *subvol = NULL;
 	int           ret = -1;
@@ -1438,7 +1558,7 @@ dht_open (call_frame_t *frame, xlator_t *this,
 
 	STACK_WIND (frame, dht_fd_cbk,
 		    subvol, subvol->fops->open,
-		    loc, flags, fd);
+		    loc, flags, fd, wbflags);
 
 	return 0;
 
@@ -1499,9 +1619,10 @@ err:
 
 int
 dht_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-		int op_ret, int op_errno, struct stat *stbuf)
+		int op_ret, int op_errno, struct stat *prebuf,
+                struct stat *postbuf)
 {
-        DHT_STACK_UNWIND (frame, op_ret, op_errno, stbuf);
+        DHT_STACK_UNWIND (frame, op_ret, op_errno, prebuf, postbuf);
 
         return 0;
 }
@@ -1616,7 +1737,7 @@ dht_fsync (call_frame_t *frame, xlator_t *this,
 	}
 	local->call_cnt = 1;
 
-	STACK_WIND (frame, dht_err_cbk,
+	STACK_WIND (frame, dht_fsync_cbk,
 		    subvol, subvol->fops->fsync,
 		    fd, datasync);
 
@@ -2010,7 +2131,8 @@ err:
 int
 dht_newfile_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 		 int op_ret, int op_errno,
-		 inode_t *inode, struct stat *stbuf)
+                 inode_t *inode, struct stat *stbuf, struct stat *preparent,
+                 struct stat *postparent)
 {
 	call_frame_t *prev = NULL;
 	dht_layout_t *layout = NULL;
@@ -2052,7 +2174,8 @@ int
 dht_mknod_linkfile_create_cbk (call_frame_t *frame, void *cookie,
                                xlator_t *this,
                                int32_t op_ret, int32_t op_errno,
-                               inode_t *inode, struct stat *stbuf)
+                               inode_t *inode, struct stat *stbuf,
+                               struct stat *preparent, struct stat *postparent)
 {
 	dht_local_t  *local = NULL;
 	xlator_t     *cached_subvol = NULL;
@@ -2235,11 +2358,11 @@ dht_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc)
 	if (hashed_subvol != cached_subvol)
 		local->call_cnt++;
 
-	STACK_WIND (frame, dht_err_cbk,
+	STACK_WIND (frame, dht_unlink_cbk,
 		    cached_subvol, cached_subvol->fops->unlink, loc);
 
 	if (hashed_subvol != cached_subvol)
-		STACK_WIND (frame, dht_err_cbk,
+		STACK_WIND (frame, dht_unlink_cbk,
 			    hashed_subvol, hashed_subvol->fops->unlink, loc);
 
 	return 0;
@@ -2255,7 +2378,8 @@ err:
 int
 dht_link_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 	      int op_ret, int op_errno,
-	      inode_t *inode, struct stat *stbuf)
+              inode_t *inode, struct stat *stbuf, struct stat *preparent,
+              struct stat *postparent)
 {
         call_frame_t *prev = NULL;
 	dht_layout_t *layout = NULL;
@@ -2289,7 +2413,8 @@ out:
 int
 dht_link_linkfile_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 		       int op_ret, int op_errno,
-		       inode_t *inode, struct stat *stbuf)
+                       inode_t *inode, struct stat *stbuf,
+                       struct stat *preparent, struct stat *postparent)
 {
 	dht_local_t  *local = NULL;
 	xlator_t     *srcvol = NULL;
@@ -2393,7 +2518,8 @@ err:
 int
 dht_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 		 int op_ret, int op_errno,
-		 fd_t *fd, inode_t *inode, struct stat *stbuf)
+		 fd_t *fd, inode_t *inode, struct stat *stbuf,
+                 struct stat *preparent, struct stat *postparent)
 {
 	call_frame_t *prev = NULL;
 	dht_layout_t *layout = NULL;
@@ -2435,7 +2561,8 @@ int
 dht_create_linkfile_create_cbk (call_frame_t *frame, void *cookie,
 				xlator_t *this,
 				int32_t op_ret, int32_t op_errno,
-				inode_t *inode, struct stat *stbuf)
+                                inode_t *inode, struct stat *stbuf,
+                                struct stat *preparent, struct stat *postparent)
 {
 	dht_local_t  *local = NULL;
 	xlator_t     *cached_subvol = NULL;
@@ -2570,7 +2697,8 @@ dht_mkdir_selfheal_cbk (call_frame_t *frame, void *cookie,
 
 int
 dht_mkdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-	       int op_ret, int op_errno, inode_t *inode, struct stat *stbuf)
+               int op_ret, int op_errno, inode_t *inode, struct stat *stbuf,
+               struct stat *preparent, struct stat *postparent)
 {
 	dht_local_t  *local = NULL;
 	int           this_call_cnt = 0;
@@ -2618,8 +2746,9 @@ unlock:
 
 int
 dht_mkdir_hashed_cbk (call_frame_t *frame, void *cookie, 
-		      xlator_t *this, int op_ret, int op_errno, 
-		      inode_t *inode, struct stat *stbuf)
+		      xlator_t *this, int op_ret, int op_errno,
+                      inode_t *inode, struct stat *stbuf,
+                      struct stat *preparent, struct stat *postparent)
 {
 	dht_local_t  *local = NULL;
 	int           ret = -1;
@@ -2764,7 +2893,8 @@ dht_rmdir_selfheal_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
 int
 dht_rmdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-	       int op_ret, int op_errno)
+	       int op_ret, int op_errno, struct stat *preparent,
+               struct stat *postparent)
 {
 	uint64_t      tmp_layout = 0;
 	dht_local_t  *local = NULL;
diff --git a/xlators/cluster/dht/src/dht-linkfile.c b/xlators/cluster/dht/src/dht-linkfile.c
index 213d3f2bf..d28f7beca 100644
--- a/xlators/cluster/dht/src/dht-linkfile.c
+++ b/xlators/cluster/dht/src/dht-linkfile.c
@@ -40,7 +40,7 @@ dht_linkfile_xattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 	local = frame->local;
 	local->linkfile.linkfile_cbk (frame, cookie, this, op_ret, op_errno,
 				      local->linkfile.inode,
-				      &local->linkfile.stbuf);
+				      &local->linkfile.stbuf, NULL, NULL);
 
 	return 0;
 }
@@ -48,8 +48,9 @@ dht_linkfile_xattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
 int
 dht_linkfile_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-			 int op_ret, int op_errno,
-			 inode_t *inode, struct stat *stbuf)
+                         int op_ret, int op_errno, inode_t *inode,
+                         struct stat *stbuf, struct stat *preparent,
+                         struct stat *postparent)
 {
 	dht_local_t  *local = NULL;
 	call_frame_t *prev = NULL;
@@ -104,8 +105,8 @@ err:
 		str_data = NULL;
 	}
 
-	local->linkfile.linkfile_cbk (frame, cookie, this,
-				      op_ret, op_errno, inode, stbuf);
+        local->linkfile.linkfile_cbk (frame, cookie, this, op_ret, op_errno,
+                                      inode, stbuf, preparent, postparent);
 	return 0;
 }
 
@@ -132,7 +133,8 @@ dht_linkfile_create (call_frame_t *frame, fop_mknod_cbk_t linkfile_cbk,
 
 int
 dht_linkfile_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-			 int32_t op_ret, int32_t op_errno)
+			 int32_t op_ret, int32_t op_errno,
+                         struct stat *preparent, struct stat *postparent)
 {
 	dht_local_t   *local = NULL;
 	call_frame_t  *prev = NULL;
diff --git a/xlators/cluster/dht/src/dht-rename.c b/xlators/cluster/dht/src/dht-rename.c
index 6c34dabad..f91d1983d 100644
--- a/xlators/cluster/dht/src/dht-rename.c
+++ b/xlators/cluster/dht/src/dht-rename.c
@@ -33,7 +33,9 @@
 
 int
 dht_rename_dir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-		    int32_t op_ret, int32_t op_errno, struct stat *stbuf)
+		    int32_t op_ret, int32_t op_errno, struct stat *stbuf,
+                    struct stat *preoldparent, struct stat *postoldparent,
+                    struct stat *prenewparent, struct stat *postnewparent)
 {
 	dht_local_t  *local = NULL;
 	int           this_call_cnt = 0;
@@ -213,7 +215,8 @@ err:
 
 int
 dht_rename_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-		       int32_t op_ret, int32_t op_errno)
+		       int32_t op_ret, int32_t op_errno, struct stat *preparent,
+                       struct stat *postparent)
 {
 	dht_local_t  *local = NULL;
 	call_frame_t *prev = NULL;
@@ -240,7 +243,9 @@ dht_rename_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
 int
 dht_rename_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-		int32_t op_ret, int32_t op_errno, struct stat *stbuf)
+		int32_t op_ret, int32_t op_errno, struct stat *stbuf,
+                struct stat *preoldparent, struct stat *postoldparent,
+                struct stat *prenewparent, struct stat *postnewparent)
 {
 	dht_local_t  *local = NULL;
 	call_frame_t *prev = NULL;
@@ -369,7 +374,8 @@ dht_do_rename (call_frame_t *frame)
 int
 dht_rename_links_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 		      int32_t op_ret, int32_t op_errno,
-		      inode_t *inode, struct stat *stbuf)
+                      inode_t *inode, struct stat *stbuf,
+                      struct stat *preparent, struct stat *postparent)
 {
 	dht_local_t  *local = NULL;
 	call_frame_t *prev = NULL;
diff --git a/xlators/cluster/dht/src/dht-selfheal.c b/xlators/cluster/dht/src/dht-selfheal.c
index df8b2047b..d3b36363e 100644
--- a/xlators/cluster/dht/src/dht-selfheal.c
+++ b/xlators/cluster/dht/src/dht-selfheal.c
@@ -196,7 +196,8 @@ dht_selfheal_dir_xattr (call_frame_t *frame, loc_t *loc, dht_layout_t *layout)
 int
 dht_selfheal_dir_mkdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 			    int op_ret, int op_errno,
-			    inode_t *inode, struct stat *stbuf)
+                            inode_t *inode, struct stat *stbuf,
+                            struct stat *preparent, struct stat *postparent)
 {
 	dht_local_t   *local = NULL;
 	dht_layout_t  *layout = NULL;
diff --git a/xlators/cluster/dht/src/nufa.c b/xlators/cluster/dht/src/nufa.c
index 6be7206bf..17516a122 100644
--- a/xlators/cluster/dht/src/nufa.c
+++ b/xlators/cluster/dht/src/nufa.c
@@ -30,7 +30,8 @@
 int 
 nufa_local_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 		       int op_ret, int op_errno,
-		       inode_t *inode, struct stat *stbuf, dict_t *xattr)
+                       inode_t *inode, struct stat *stbuf, dict_t *xattr,
+                       struct stat *postparent)
 {
 	dht_layout_t *layout      = NULL;
         xlator_t     *subvol      = NULL;
@@ -268,7 +269,9 @@ err:
 int
 nufa_create_linkfile_create_cbk (call_frame_t *frame, void *cookie, 
 				 xlator_t *this, int op_ret, int op_errno,
-				 inode_t *inode, struct stat *stbuf)
+                                 inode_t *inode, struct stat *stbuf,
+                                 struct stat *preparent,
+                                 struct stat *postparent)
 {
  	dht_local_t  *local = NULL;
  	call_frame_t *prev = NULL;
@@ -374,8 +377,9 @@ err:
 
 int
 nufa_mknod_linkfile_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-			 int op_ret, int op_errno,
-			 inode_t *inode, struct stat *stbuf)
+                         int op_ret, int op_errno, inode_t *inode,
+                         struct stat *stbuf, struct stat *preparent,
+                         struct stat *postparent)
 {
  	dht_local_t  *local = NULL;
  	call_frame_t *prev = NULL;
diff --git a/xlators/cluster/ha/src/ha.c b/xlators/cluster/ha/src/ha.c
index b380cb1e9..b2ca48b10 100644
--- a/xlators/cluster/ha/src/ha.c
+++ b/xlators/cluster/ha/src/ha.c
@@ -64,7 +64,8 @@ ha_lookup_cbk (call_frame_t *frame,
 	       int32_t op_errno,
 	       inode_t *inode,
 	       struct stat *buf,
-	       dict_t *dict)
+               dict_t *dict,
+               struct stat *postparent)
 {
 	ha_local_t *local = NULL;
 	ha_private_t *pvt = NULL;
@@ -307,7 +308,8 @@ ha_truncate_cbk (call_frame_t *frame,
 		 xlator_t *this,
 		 int32_t op_ret,
 		 int32_t op_errno,
-		 struct stat *buf)
+		 struct stat *prebuf,
+                 struct stat *postbuf)
 {
 	int ret = -1;
 
@@ -316,7 +318,8 @@ ha_truncate_cbk (call_frame_t *frame,
 		STACK_UNWIND (frame,
 			      op_ret,
 			      op_errno,
-			      buf);
+			      prebuf,
+                              postbuf);
 	}
 	return 0;
 }
@@ -357,7 +360,8 @@ ha_ftruncate_cbk (call_frame_t *frame,
 		  xlator_t *this,
 		  int32_t op_ret,
 		  int32_t op_errno,
-		  struct stat *buf)
+		  struct stat *prebuf,
+                  struct stat *postbuf)
 {
 	int ret = -1;
 
@@ -367,7 +371,7 @@ ha_ftruncate_cbk (call_frame_t *frame,
 		STACK_UNWIND (frame,
 			      op_ret,
 			      op_errno,
-			      buf);
+			      prebuf, postbuf);
 	}
 	return 0;
 }
@@ -458,7 +462,8 @@ ha_readlink_cbk (call_frame_t *frame,
 		 xlator_t *this,
 		 int32_t op_ret,
 		 int32_t op_errno,
-		 const char *path)
+		 const char *path,
+                 struct stat *sbuf)
 {
 	int ret = -1;
 
@@ -468,7 +473,8 @@ ha_readlink_cbk (call_frame_t *frame,
 		STACK_UNWIND (frame,
 			      op_ret,
 			      op_errno,
-			      path);
+			      path,
+                              sbuf);
 	}
 	return 0;
 }
@@ -511,7 +517,8 @@ ha_mknod_lookup_cbk (call_frame_t *frame,
 		     int32_t op_errno,
 		     inode_t *inode,
 		     struct stat *buf,
-		     dict_t *dict)
+                     dict_t *dict,
+                     struct stat *postparent)
 {
 	ha_local_t *local = NULL;
 	ha_private_t *pvt = NULL;
@@ -573,7 +580,9 @@ ha_mknod_cbk (call_frame_t *frame,
 	      int32_t op_ret,
 	      int32_t op_errno,
 	      inode_t *inode,
-	      struct stat *buf)
+              struct stat *buf,
+              struct stat *preparent,
+              struct stat *postparent)
 {
 	ha_local_t *local = NULL;
 	ha_private_t *pvt = NULL;
@@ -708,7 +717,8 @@ ha_mkdir_lookup_cbk (call_frame_t *frame,
 		     int32_t op_errno,
 		     inode_t *inode,
 		     struct stat *buf,
-		     dict_t *dict)
+                     dict_t *dict,
+                     struct stat *postparent)
 {
 	ha_local_t *local = NULL;
 	ha_private_t *pvt = NULL;
@@ -762,7 +772,9 @@ ha_mkdir_cbk (call_frame_t *frame,
 	      int32_t op_ret,
 	      int32_t op_errno,
 	      inode_t *inode,
-	      struct stat *buf)
+              struct stat *buf,
+              struct stat *preparent,
+              struct stat *postparent)
 {
 	ha_local_t *local = NULL;
 	ha_private_t *pvt = NULL;
@@ -886,7 +898,9 @@ ha_unlink_cbk (call_frame_t *frame,
 	       void *cookie,
 	       xlator_t *this,
 	       int32_t op_ret,
-	       int32_t op_errno)
+	       int32_t op_errno,
+               struct stat *preparent,
+               struct stat *postparent)
 {
 	int ret = -1;
 
@@ -931,7 +945,9 @@ ha_rmdir_cbk (call_frame_t *frame,
 	      void *cookie,
 	      xlator_t *this,
 	      int32_t op_ret,
-	      int32_t op_errno)
+	      int32_t op_errno,
+              struct stat *preparent,
+              struct stat *postparent)
 {
 	int ret = -1;
 
@@ -982,7 +998,8 @@ ha_symlink_lookup_cbk (call_frame_t *frame,
 		       int32_t op_errno,
 		       inode_t *inode,
 		       struct stat *buf,
-		       dict_t *dict)
+                       dict_t *dict,
+                       struct stat *postparent)
 {
 	ha_local_t *local = NULL;
 	ha_private_t *pvt = NULL;
@@ -1036,7 +1053,9 @@ ha_symlink_cbk (call_frame_t *frame,
 		int32_t op_ret,
 		int32_t op_errno,
 		inode_t *inode,
-		struct stat *buf)
+                struct stat *buf,
+                struct stat *preparent,
+                struct stat *postparent)
 {
 	ha_local_t *local = NULL;
 	ha_private_t *pvt = NULL;
@@ -1163,7 +1182,11 @@ ha_rename_cbk (call_frame_t *frame,
 	       xlator_t *this,
 	       int32_t op_ret,
 	       int32_t op_errno,
-	       struct stat *buf)
+	       struct stat *buf,
+               struct stat *preoldparent,
+               struct stat *postoldparent,
+               struct stat *prenewparent,
+               struct stat *postnewparent)
 {
 	int ret = -1;
 
@@ -1211,7 +1234,8 @@ ha_link_lookup_cbk (call_frame_t *frame,
 		    int32_t op_errno,
 		    inode_t *inode,
 		    struct stat *buf,
-		    dict_t *dict)
+                    dict_t *dict,
+                    struct stat *postparent)
 {
 	ha_local_t *local = NULL;
 	ha_private_t *pvt = NULL;
@@ -1265,7 +1289,9 @@ ha_link_cbk (call_frame_t *frame,
 	     int32_t op_ret,
 	     int32_t op_errno,
 	     inode_t *inode,
-	     struct stat *buf)
+             struct stat *buf,
+             struct stat *preparent,
+             struct stat *postparent)
 {
 	ha_local_t *local = NULL;
 	ha_private_t *pvt = NULL;
@@ -1405,7 +1431,9 @@ ha_create_cbk (call_frame_t *frame,
 	       int32_t op_errno,
 	       fd_t *fd,
 	       inode_t *inode,
-	       struct stat *buf)
+	       struct stat *buf,
+               struct stat *preparent,
+               struct stat *postparent)
 {
 	ha_local_t *local = NULL;
 	ha_private_t *pvt = NULL;
@@ -1602,7 +1630,7 @@ int32_t
 ha_open (call_frame_t *frame,
 	 xlator_t *this,
 	 loc_t *loc,
-	 int32_t flags, fd_t *fd)
+	 int32_t flags, fd_t *fd, int wbflags)
 {
 	ha_local_t *local = NULL;
 	ha_private_t *pvt = NULL;
@@ -1646,7 +1674,7 @@ ha_open (call_frame_t *frame,
 				    ha_open_cbk,
 				    children[i],
 				    children[i]->fops->open,
-				    loc, flags, fd);
+				    loc, flags, fd, wbflags);
 			if (--cnt == 0)
 				break;
 		}
@@ -1719,7 +1747,8 @@ ha_writev_cbk (call_frame_t *frame,
 	       xlator_t *this,
 	       int32_t op_ret,
 	       int32_t op_errno,
-	       struct stat *stbuf)
+               struct stat *prebuf,
+	       struct stat *postbuf)
 {
 	int ret = 0;
 	ret = ha_handle_cbk (frame, cookie, op_ret, op_errno);
@@ -1728,7 +1757,8 @@ ha_writev_cbk (call_frame_t *frame,
 		STACK_UNWIND (frame,
 			      op_ret,
 			      op_errno,
-			      stbuf);
+                              prebuf,
+			      postbuf);
 	}
 	return 0;
 }
@@ -1820,7 +1850,9 @@ ha_fsync_cbk (call_frame_t *frame,
 	      void *cookie,
 	      xlator_t *this,
 	      int32_t op_ret,
-	      int32_t op_errno)
+	      int32_t op_errno,
+              struct stat *prebuf,
+              struct stat *postbuf)
 {
 	int ret = 0;
 	ret = ha_handle_cbk (frame, cookie, op_ret, op_errno);
diff --git a/xlators/cluster/map/src/map.c b/xlators/cluster/map/src/map.c
index 3eb49e2ed..91cf8eb24 100644
--- a/xlators/cluster/map/src/map.c
+++ b/xlators/cluster/map/src/map.c
@@ -92,14 +92,15 @@ map_truncate_cbk (call_frame_t *frame,
 		      xlator_t *this,
 		      int32_t op_ret,
 		      int32_t op_errno,
-		      struct stat *buf)
+		      struct stat *prebuf,
+                      struct stat *postbuf)
 {
         call_frame_t *prev = NULL;
         prev  = cookie;
 	
-	map_itransform (this, prev->this, buf->st_ino, &buf->st_ino);
+	map_itransform (this, prev->this, postbuf->st_ino, &postbuf->st_ino);
 
-	STACK_UNWIND (frame, op_ret, op_errno, buf);
+	STACK_UNWIND (frame, op_ret, op_errno, prebuf, postbuf);
 	return 0;
 }
 
@@ -109,14 +110,15 @@ map_ftruncate_cbk (call_frame_t *frame,
 		       xlator_t *this,
 		       int32_t op_ret,
 		       int32_t op_errno,
-		       struct stat *buf)
+		       struct stat *prebuf,
+                       struct stat *postbuf)
 {
         call_frame_t *prev = NULL;
         prev  = cookie;
 	
-	map_itransform (this, prev->this, buf->st_ino, &buf->st_ino);
+	map_itransform (this, prev->this, postbuf->st_ino, &postbuf->st_ino);
 
-	STACK_UNWIND (frame, op_ret, op_errno, buf);
+	STACK_UNWIND (frame, op_ret, op_errno, prebuf, postbuf);
 	return 0;
 }
 
@@ -138,9 +140,10 @@ map_readlink_cbk (call_frame_t *frame,
 		      xlator_t *this,
 		      int32_t op_ret,
 		      int32_t op_errno,
-		      const char *path)
+		      const char *path,
+                      struct stat *sbuf)
 {
-	STACK_UNWIND (frame, op_ret, op_errno, path);
+	STACK_UNWIND (frame, op_ret, op_errno, path, sbuf);
 	return 0;
 }
 
@@ -149,9 +152,11 @@ map_unlink_cbk (call_frame_t *frame,
 		    void *cookie,
 		    xlator_t *this,
 		    int32_t op_ret,
-		    int32_t op_errno)
+		    int32_t op_errno,
+                    struct stat *preparent,
+                    struct stat *postparent)
 {
-	STACK_UNWIND (frame, op_ret, op_errno);
+	STACK_UNWIND (frame, op_ret, op_errno, preparent, postparent);
 	return 0;
 }
 
@@ -160,9 +165,11 @@ map_rmdir_cbk (call_frame_t *frame,
 		   void *cookie,
 		   xlator_t *this,
 		   int32_t op_ret,
-		   int32_t op_errno)
+		   int32_t op_errno,
+                   struct stat *preparent,
+                   struct stat *postparent)
 {
-	STACK_UNWIND (frame, op_ret, op_errno);
+	STACK_UNWIND (frame, op_ret, op_errno, preparent, postparent);
 	return 0;
 }
 
@@ -173,7 +180,11 @@ map_rename_cbk (call_frame_t *frame,
 		    xlator_t *this,
 		    int32_t op_ret,
 		    int32_t op_errno,
-		    struct stat *buf)
+		    struct stat *buf,
+                    struct stat *preoldparent,
+                    struct stat *postoldparent,
+                    struct stat *prenewparent,
+                    struct stat *postnewparent)
 {
         call_frame_t *prev = NULL;
         prev  = cookie;
@@ -191,7 +202,9 @@ map_link_cbk (call_frame_t *frame,
 		  int32_t op_ret,
 		  int32_t op_errno,
 		  inode_t *inode,
-		  struct stat *buf)
+                  struct stat *buf,
+                  struct stat *preparent,
+                  struct stat *postparent)
 {
         call_frame_t *prev = NULL;
         prev  = cookie;
@@ -240,14 +253,15 @@ map_writev_cbk (call_frame_t *frame,
 		    xlator_t *this,
 		    int32_t op_ret,
 		    int32_t op_errno,
-		    struct stat *stbuf)
+                    struct stat *prebuf,
+		    struct stat *postbuf)
 {
         call_frame_t *prev = NULL;
         prev  = cookie;
 	
-	map_itransform (this, prev->this, stbuf->st_ino, &stbuf->st_ino);
+	map_itransform (this, prev->this, postbuf->st_ino, &postbuf->st_ino);
 
-	STACK_UNWIND (frame, op_ret, op_errno, stbuf);
+	STACK_UNWIND (frame, op_ret, op_errno, prebuf, postbuf);
 	return 0;
 }
 
@@ -268,9 +282,11 @@ map_fsync_cbk (call_frame_t *frame,
 		   void *cookie,
 		   xlator_t *this,
 		   int32_t op_ret,
-		   int32_t op_errno)
+		   int32_t op_errno,
+                   struct stat *prebuf,
+                   struct stat *postbuf)
 {
-	STACK_UNWIND (frame, op_ret, op_errno);
+	STACK_UNWIND (frame, op_ret, op_errno, prebuf, postbuf);
 	return 0;
 }
 
@@ -476,7 +492,9 @@ map_newentry_cbk (call_frame_t *frame,
 		  int32_t op_ret,
 		  int32_t op_errno,
 		  inode_t *inode,
-		  struct stat *buf)
+                  struct stat *buf,
+                  struct stat *preparent,
+                  struct stat *postparent)
 {
         call_frame_t *prev = NULL;
         prev  = cookie;
@@ -497,7 +515,9 @@ map_create_cbk (call_frame_t *frame,
 		int32_t op_errno,
 		fd_t *fd,
 		inode_t *inode,
-		struct stat *buf)
+		struct stat *buf,
+                struct stat *preparent,
+                struct stat *postparent)
 {
         call_frame_t *prev = NULL;
         prev  = cookie;
@@ -605,7 +625,8 @@ map_single_lookup_cbk (call_frame_t *frame,
 		       int32_t op_errno,
 		       inode_t *inode,
 		       struct stat *buf,
-		       dict_t *dict)
+                       dict_t *dict,
+                       struct stat *postparent)
 {
         call_frame_t *prev = NULL;
         prev  = cookie;
@@ -625,7 +646,8 @@ map_root_lookup_cbk (call_frame_t *frame,
                      int32_t op_errno,
                      inode_t *inode,
                      struct stat *buf,
-                     dict_t *dict)
+                     dict_t *dict,
+                     struct stat *postparent)
 {
 	int          callcnt = 0;
 	map_local_t *local = NULL;
@@ -1210,7 +1232,7 @@ int32_t
 map_open (call_frame_t *frame,
 	  xlator_t *this,
 	  loc_t *loc,
-	  int32_t flags, fd_t *fd)
+	  int32_t flags, fd_t *fd, int wbflags)
 {
 	int32_t op_errno = 1;
 	xlator_t *subvol   = NULL;
@@ -1228,7 +1250,7 @@ map_open (call_frame_t *frame,
 	}
 
 	STACK_WIND (frame, map_open_cbk, subvol, 
-                    subvol->fops->open, loc, flags, fd);
+                    subvol->fops->open, loc, flags, fd, wbflags);
 
 	return 0;
  err:
diff --git a/xlators/cluster/stripe/src/stripe.c b/xlators/cluster/stripe/src/stripe.c
index 5a02d17bc..2d875ab3e 100644
--- a/xlators/cluster/stripe/src/stripe.c
+++ b/xlators/cluster/stripe/src/stripe.c
@@ -70,6 +70,19 @@ stripe_get_matching_bs (const char *path, struct stripe_options *opts,
 
 
 /*
+ * stripe_common_remove_cbk -
+ */
+int32_t
+stripe_common_remove_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                          int32_t op_ret, int32_t op_errno,
+                          struct stat *preparent, struct stat *postparent)
+{
+        STACK_UNWIND (frame, op_ret, op_errno, preparent, postparent);
+        return 0;
+}
+
+
+/*
  * stripe_common_cbk -
  */
 int32_t
@@ -127,6 +140,169 @@ stripe_stack_unwind_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         return 0;
 }
 
+
+int32_t
+stripe_fsync_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                  int32_t op_ret, int32_t op_errno, struct stat *prebuf,
+                  struct stat *postbuf)
+{
+        int32_t         callcnt = 0;
+        stripe_local_t *local   = NULL;
+
+        local = frame->local;
+
+        LOCK (&frame->lock);
+        {
+                callcnt = --local->call_count;
+
+                if (op_ret == -1) {
+                        gf_log (this->name, GF_LOG_DEBUG, 
+                                "%s returned %s",
+                                ((call_frame_t *)cookie)->this->name,
+                                strerror (op_errno));
+                        local->op_errno = op_errno;
+                        if (op_errno == ENOTCONN)
+                                local->failed = 1;
+                }
+                if (op_ret >= 0)
+                        local->op_ret = op_ret;
+        }
+        UNLOCK (&frame->lock);
+
+        if (!callcnt) {
+                if (local->failed)
+                        local->op_ret = -1;
+
+                if (local->loc.path)
+                        loc_wipe (&local->loc);
+                if (local->loc2.path)
+                        loc_wipe (&local->loc2);
+
+                STACK_UNWIND (frame, local->op_ret, local->op_errno);
+        }
+        return 0;
+}
+
+
+
+/**
+ * stripe_stack_unwind_remove_cbk -  This function is used for unlink
+ * _cbk without any extra arguments (other than the minimum given)
+ * This is called from functions like fsync,unlink,rmdir etc.
+ *
+ */
+int32_t
+stripe_stack_unwind_unlink_cbk (call_frame_t *frame, void *cookie,
+                                xlator_t *this, int32_t op_ret,
+                                int32_t op_errno, struct stat *preparent,
+                                struct stat *postparent)
+{
+        int32_t         callcnt = 0;
+        stripe_local_t *local   = NULL;
+
+        local = frame->local;
+
+        LOCK (&frame->lock);
+        {
+                callcnt = --local->call_count;
+
+                if (op_ret == -1) {
+                        gf_log (this->name, GF_LOG_DEBUG,
+                                "%s returned %s",
+                                ((call_frame_t *)cookie)->this->name,
+                                strerror (op_errno));
+                        local->op_errno = op_errno;
+                        if (op_errno == ENOTCONN)
+                                local->failed = 1;
+                }
+                if (op_ret >= 0)
+                        local->op_ret = op_ret;
+        }
+        UNLOCK (&frame->lock);
+
+        if (!callcnt) {
+                if (local->failed)
+                        local->op_ret = -1;
+
+                if (local->loc.path)
+                        loc_wipe (&local->loc);
+                if (local->loc2.path)
+                        loc_wipe (&local->loc2);
+
+                STACK_UNWIND (frame, local->op_ret, local->op_errno);
+        }
+        return 0;
+}
+
+
+int32_t
+stripe_truncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                     int32_t op_ret, int32_t op_errno, struct stat *prebuf,
+                     struct stat *postbuf)
+{
+        int32_t         callcnt = 0;
+        stripe_local_t *local = NULL;
+
+        local = frame->local;
+
+        LOCK (&frame->lock);
+        {
+                callcnt = --local->call_count;
+
+                if (op_ret == -1) {
+                        gf_log (this->name, GF_LOG_DEBUG,
+                                "%s returned error %s",
+                                ((call_frame_t *)cookie)->this->name,
+                                strerror (op_errno));
+                        local->op_errno = op_errno;
+                        if (op_errno == ENOTCONN)
+                                local->failed = 1;
+                }
+
+                if (op_ret == 0) {
+                        local->op_ret = 0;
+                        if (local->stbuf.st_blksize == 0) {
+                                local->stbuf = *postbuf;
+                                /* Because st_blocks gets added again */
+                                local->stbuf.st_blocks = 0;
+                        }
+
+                        if (FIRST_CHILD(this) ==
+                            ((call_frame_t *)cookie)->this) {
+                                /* Always, pass the inode number of
+                                   first child to the above layer */
+                                local->stbuf.st_ino = postbuf->st_ino;
+                                local->stbuf.st_mtime = postbuf->st_mtime;
+                        }
+
+                        local->stbuf.st_blocks += postbuf->st_blocks;
+                        if (local->stbuf.st_size < postbuf->st_size)
+                                local->stbuf.st_size = postbuf->st_size;
+                        if (local->stbuf.st_blksize != postbuf->st_blksize) {
+                                /* TODO: add to blocks in terms of
+                                   original block size */
+                        }
+                }
+        }
+        UNLOCK (&frame->lock);
+
+        if (!callcnt) {
+                if (local->failed)
+                        local->op_ret = -1;
+
+                if (local->loc.path)
+                        loc_wipe (&local->loc);
+                if (local->loc2.path)
+                        loc_wipe (&local->loc2);
+
+                STACK_UNWIND (frame, local->op_ret, local->op_errno,
+                              &local->stbuf);
+        }
+
+        return 0;
+}
+
+
 int32_t 
 stripe_common_buf_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                        int32_t op_ret, int32_t op_errno, struct stat *buf)
@@ -135,6 +311,76 @@ stripe_common_buf_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         return 0;
 }
 
+
+int32_t
+stripe_stack_rename_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                         int32_t op_ret, int32_t op_errno, struct stat *buf,
+                         struct stat *preoldparent, struct stat *postoldparent,
+                         struct stat *prenewparent, struct stat *postnewparent)
+{
+        int32_t         callcnt = 0;
+        stripe_local_t *local = NULL;
+
+        local = frame->local;
+
+        LOCK (&frame->lock);
+        {
+                callcnt = --local->call_count;
+
+                if (op_ret == -1) {
+                        gf_log (this->name, GF_LOG_DEBUG,
+                                "%s returned error %s",
+                                ((call_frame_t *)cookie)->this->name,
+                                strerror (op_errno));
+                        local->op_errno = op_errno;
+                        if (op_errno == ENOTCONN)
+                                local->failed = 1;
+                }
+
+                if (op_ret == 0) {
+                        local->op_ret = 0;
+                        if (local->stbuf.st_blksize == 0) {
+                                local->stbuf = *buf;
+                                /* Because st_blocks gets added again */
+                                local->stbuf.st_blocks = 0;
+                        }
+
+                        if (FIRST_CHILD(this) ==
+                            ((call_frame_t *)cookie)->this) {
+                                /* Always, pass the inode number of
+                                   first child to the above layer */
+                                local->stbuf.st_ino = buf->st_ino;
+                                local->stbuf.st_mtime = buf->st_mtime;
+                        }
+
+                        local->stbuf.st_blocks += buf->st_blocks;
+                        if (local->stbuf.st_size < buf->st_size)
+                                local->stbuf.st_size = buf->st_size;
+                        if (local->stbuf.st_blksize != buf->st_blksize) {
+                                /* TODO: add to blocks in terms of
+                                   original block size */
+                        }
+                }
+        }
+        UNLOCK (&frame->lock);
+
+        if (!callcnt) {
+                if (local->failed)
+                        local->op_ret = -1;
+
+                if (local->loc.path)
+                        loc_wipe (&local->loc);
+                if (local->loc2.path)
+                        loc_wipe (&local->loc2);
+
+                STACK_UNWIND (frame, local->op_ret, local->op_errno,
+                              &local->stbuf);
+        }
+
+        return 0;
+}
+
+
 /**
  * stripe_stack_unwind_buf_cbk -  This function is used for all the _cbk with 
  *    'struct stat *buf' as extra argument (other than minimum)
@@ -214,9 +460,11 @@ stripe_stack_unwind_buf_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 int32_t 
 stripe_common_inode_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                          int32_t op_ret, int32_t op_errno, inode_t *inode,
-                         struct stat *buf)
+                         struct stat *buf, struct stat *preparent,
+                         struct stat *postparent)
 {
-        STACK_UNWIND (frame, op_ret, op_errno, inode, buf);
+        STACK_UNWIND (frame, op_ret, op_errno, inode, buf, preparent,
+                      postparent);
         return 0;
 }
 
@@ -232,7 +480,8 @@ int32_t
 stripe_stack_unwind_inode_cbk (call_frame_t *frame, void *cookie,
                                xlator_t *this, int32_t op_ret, 
                                int32_t op_errno, inode_t *inode,
-                               struct stat *buf)
+                               struct stat *buf, struct stat *preparent,
+                               struct stat *postparent)
 {
         int32_t         callcnt = 0;
         stripe_local_t *local   = NULL;
@@ -293,7 +542,7 @@ stripe_stack_unwind_inode_cbk (call_frame_t *frame, void *cookie,
 int32_t 
 stripe_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this, 
                    int32_t op_ret, int32_t op_errno, inode_t *inode,
-                   struct stat *buf, dict_t *dict)
+                   struct stat *buf, dict_t *dict, struct stat *postparent)
 {
         int32_t         callcnt = 0;
         dict_t         *tmp_dict = NULL;
@@ -611,7 +860,7 @@ stripe_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset)
                 send_fop_to_all = 1;
 
         if (!send_fop_to_all) {
-                STACK_WIND (frame, stripe_common_buf_cbk, trav->xlator,
+                STACK_WIND (frame, stripe_truncate_cbk, trav->xlator,
                             trav->xlator->fops->truncate, loc, offset);
         } else {
                 /* Initialization */
@@ -626,7 +875,7 @@ stripe_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset)
                 local->call_count = priv->child_count;
     
                 while (trav) {
-                        STACK_WIND (frame, stripe_stack_unwind_buf_cbk,
+                        STACK_WIND (frame, stripe_truncate_cbk,
                                     trav->xlator, trav->xlator->fops->truncate,
                                     loc, offset);
                         trav = trav->next;
@@ -822,7 +1071,9 @@ stripe_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd,
 
 int32_t 
 stripe_first_rename_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                         int32_t op_ret, int32_t op_errno, struct stat *buf)
+                         int32_t op_ret, int32_t op_errno, struct stat *buf,
+                         struct stat *preoldparent, struct stat *postoldparent,
+                         struct stat *prenewparent, struct stat *postnewparent)
 {
         stripe_local_t *local = NULL;
         xlator_list_t  *trav = NULL;
@@ -840,7 +1091,7 @@ stripe_first_rename_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         trav = trav->next; /* Skip first child */
 
         while (trav) {
-                STACK_WIND (frame, stripe_stack_unwind_buf_cbk,
+                STACK_WIND (frame, stripe_stack_rename_cbk,
                             trav->xlator, trav->xlator->fops->rename,
                             &local->loc, &local->loc2);
                 trav = trav->next;
@@ -933,9 +1184,10 @@ stripe_access (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t mask)
  */
 int32_t 
 stripe_readlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno, const char *path)
+                     int32_t op_ret, int32_t op_errno, const char *path,
+                     struct stat *sbuf)
 {
-        STACK_UNWIND (frame, op_ret, op_errno, path);
+        STACK_UNWIND (frame, op_ret, op_errno, path, sbuf);
         return 0;
 }
 
@@ -994,7 +1246,7 @@ stripe_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc)
                 send_fop_to_all = 1;
 
         if (!send_fop_to_all) {
-                STACK_WIND (frame, stripe_common_cbk, trav->xlator,
+                STACK_WIND (frame, stripe_common_remove_cbk, trav->xlator,
                             trav->xlator->fops->unlink, loc);
         } else {
                 /* Don't unlink a file if a node is down */
@@ -1014,7 +1266,7 @@ stripe_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc)
                 local->call_count = priv->child_count;
     
                 while (trav) {
-                        STACK_WIND (frame, stripe_stack_unwind_cbk,
+                        STACK_WIND (frame, stripe_stack_unwind_unlink_cbk,
                                     trav->xlator, trav->xlator->fops->unlink,
                                     loc);
                         trav = trav->next;
@@ -1030,7 +1282,9 @@ stripe_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc)
 
 int32_t 
 stripe_first_rmdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                        int32_t op_ret, int32_t op_errno)
+                        int32_t op_ret, int32_t op_errno,struct stat *preparent,
+                        struct stat *postparent)
+
 {
         xlator_list_t *trav = NULL;
         stripe_local_t *local = NULL;
@@ -1047,7 +1301,7 @@ stripe_first_rmdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         trav = trav->next; /* Skip first child */
 
         while (trav) {
-                STACK_WIND (frame, stripe_stack_unwind_cbk, trav->xlator,
+                STACK_WIND (frame, stripe_stack_unwind_unlink_cbk, trav->xlator,
                             trav->xlator->fops->rmdir, &local->loc);
                 trav = trav->next;
         }
@@ -1139,7 +1393,8 @@ stripe_setxattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
 int32_t 
 stripe_mknod_ifreg_fail_unlink_cbk (call_frame_t *frame, void *cookie,
                                     xlator_t *this, int32_t op_ret,
-                                    int32_t op_errno)
+                                    int32_t op_errno, struct stat *preparent,
+                                    struct stat *postparent)
 {
         int32_t         callcnt = 0;
         stripe_local_t *local = NULL;
@@ -1216,7 +1471,8 @@ stripe_mknod_ifreg_setxattr_cbk (call_frame_t *frame, void *cookie,
 int32_t
 stripe_mknod_ifreg_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                         int32_t op_ret, int32_t op_errno, inode_t *inode,
-                        struct stat *buf)
+                        struct stat *buf, struct stat *preparent,
+                        struct stat *postparent)
 {
         int               ret = 0;
         int32_t           callcnt = 0;
@@ -1544,7 +1800,8 @@ stripe_link (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc)
 int32_t 
 stripe_create_fail_unlink_cbk (call_frame_t *frame, void *cookie,
                                xlator_t *this, int32_t op_ret,
-                               int32_t op_errno)
+                               int32_t op_errno, struct stat *preparent,
+                               struct stat *postparent)
 {
         int32_t         callcnt = 0;
         fd_t           *lfd = NULL;
@@ -1632,7 +1889,8 @@ stripe_create_setxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 int32_t
 stripe_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno, fd_t *fd,
-                   inode_t *inode, struct stat *buf)
+                   inode_t *inode, struct stat *buf, struct stat *preparent,
+                   struct stat *postparent)
 {
         int32_t           callcnt = 0;
         stripe_local_t   *local = NULL;
@@ -2015,7 +2273,7 @@ stripe_open_getxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                 while (trav) {
                         STACK_WIND (frame, stripe_open_cbk, trav->xlator,
                                     trav->xlator->fops->open, &local->loc, 
-                                    local->flags, local->fd);
+                                    local->flags, local->fd, 0);
                         trav = trav->next;
                 }
         }
@@ -2035,7 +2293,7 @@ stripe_open_getxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
  */
 int32_t
 stripe_open (call_frame_t *frame, xlator_t *this, loc_t *loc,
-             int32_t flags, fd_t *fd)
+             int32_t flags, fd_t *fd, int32_t wbflags)
 {
         stripe_local_t   *local = NULL;
         stripe_private_t *priv = NULL;
@@ -2100,7 +2358,8 @@ stripe_open (call_frame_t *frame, xlator_t *this, loc_t *loc,
                 while (trav) {
                         STACK_WIND (frame, stripe_open_cbk, trav->xlator,
                                     trav->xlator->fops->open,
-                                    &local->loc, local->flags, local->fd);
+                                    &local->loc, local->flags, local->fd,
+                                    wbflags);
                         trav = trav->next;
                 }
         }
@@ -2464,7 +2723,7 @@ stripe_fsync (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags)
         local->call_count = priv->child_count;
         
         while (trav) {
-                STACK_WIND (frame, stripe_stack_unwind_cbk, trav->xlator,
+                STACK_WIND (frame, stripe_fsync_cbk, trav->xlator,
                             trav->xlator->fops->fsync, fd, flags);
                 trav = trav->next;
         }
@@ -2552,7 +2811,7 @@ stripe_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset)
         local->call_count = priv->child_count;
         
         while (trav) {
-                STACK_WIND (frame, stripe_stack_unwind_buf_cbk, trav->xlator,
+                STACK_WIND (frame, stripe_truncate_cbk, trav->xlator,
                             trav->xlator->fops->ftruncate, fd, offset);
                 trav = trav->next;
         }
@@ -2823,7 +3082,8 @@ stripe_readv (call_frame_t *frame, xlator_t *this, fd_t *fd,
  */
 int32_t
 stripe_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                   int32_t op_ret, int32_t op_errno, struct stat *stbuf)
+                   int32_t op_ret, int32_t op_errno, struct stat *prebuf,
+                   struct stat *postbuf)
 {
         int32_t         callcnt = 0;
         stripe_local_t *local = NULL;
@@ -2844,7 +3104,7 @@ stripe_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                 }
                 if (op_ret >= 0) {
                         local->op_ret += op_ret;
-                        local->stbuf = *stbuf;
+                        local->stbuf = *postbuf;
                 }
         }
         UNLOCK (&frame->lock);
diff --git a/xlators/cluster/unify/src/unify.c b/xlators/cluster/unify/src/unify.c
index b641fb330..80ba10278 100644
--- a/xlators/cluster/unify/src/unify.c
+++ b/xlators/cluster/unify/src/unify.c
@@ -328,7 +328,8 @@ unify_lookup_cbk (call_frame_t *frame,
 		  int32_t op_errno,
 		  inode_t *inode,
 		  struct stat *buf,
-		  dict_t *dict)
+		  dict_t *dict,
+                  struct stat *postparent)
 {
 	int32_t callcnt = 0;
 	unify_private_t *priv = this->private;
@@ -788,7 +789,9 @@ unify_mkdir_cbk (call_frame_t *frame,
 		 int32_t op_ret,
 		 int32_t op_errno,
 		 inode_t *inode,
-		 struct stat *buf)
+                 struct stat *buf,
+                 struct stat *preparent,
+                 struct stat *postparent)
 {
 	int32_t callcnt = 0;
 	unify_private_t *priv = this->private;
@@ -849,7 +852,9 @@ unify_ns_mkdir_cbk (call_frame_t *frame,
 		    int32_t op_ret,
 		    int32_t op_errno,
 		    inode_t *inode,
-		    struct stat *buf)
+                    struct stat *buf,
+                    struct stat *preparent,
+                    struct stat *postparent)
 {
 	unify_private_t *priv = this->private;
 	unify_local_t *local = frame->local;
@@ -928,7 +933,9 @@ unify_rmdir_cbk (call_frame_t *frame,
 		 void *cookie,
 		 xlator_t *this,
 		 int32_t op_ret,
-		 int32_t op_errno)
+		 int32_t op_errno,
+                 struct stat *preparent,
+                 struct stat *postparent)
 {
 	int32_t callcnt = 0;
 	unify_private_t *priv = this->private;
@@ -960,7 +967,9 @@ unify_ns_rmdir_cbk (call_frame_t *frame,
 		    void *cookie,
 		    xlator_t *this,
 		    int32_t op_ret,
-		    int32_t op_errno)
+		    int32_t op_errno,
+                    struct stat *preparent,
+                    struct stat *postparent)
 {
 	int16_t index = 0;
 	unify_private_t *priv = this->private;
@@ -1237,7 +1246,8 @@ unify_open (call_frame_t *frame,
 	    xlator_t *this,
 	    loc_t *loc,
 	    int32_t flags,
-	    fd_t *fd)
+	    fd_t *fd,
+            int32_t wbflags)
 {
 	unify_private_t *priv = this->private;
 	unify_local_t *local = NULL;
@@ -1305,7 +1315,7 @@ unify_open (call_frame_t *frame,
 				   priv->xl_array[file_list[index]]->fops->open,
 				   loc,
 				   flags,
-				   fd);
+				   fd, wbflags);
 		if (need_break)
 			break;
 	}
@@ -1319,7 +1329,9 @@ unify_create_unlink_cbk (call_frame_t *frame,
 			 void *cookie,
 			 xlator_t *this,
 			 int32_t op_ret,
-			 int32_t op_errno)
+			 int32_t op_errno,
+                         struct stat *preparent,
+                         struct stat *postparent)
 {
 	unify_local_t *local = frame->local;
 	inode_t *inode = local->loc1.inode;
@@ -1432,7 +1444,8 @@ unify_create_lookup_cbk (call_frame_t *frame,
 			 int32_t op_errno,
 			 inode_t *inode,
 			 struct stat *buf,
-			 dict_t *dict)
+			 dict_t *dict,
+                         struct stat *postparent)
 {
 	int32_t callcnt = 0;
 	int16_t index = 0;
@@ -1514,7 +1527,7 @@ unify_create_lookup_cbk (call_frame_t *frame,
 					   priv->xl_array[file_list[index]]->fops->open,
 					   &local->loc1,
 					   local->flags,
-					   local->fd);
+					   local->fd, 0);
 			if (need_break)
 				break;
 		}
@@ -1535,7 +1548,9 @@ unify_create_cbk (call_frame_t *frame,
 		  int32_t op_errno,
 		  fd_t *fd,
 		  inode_t *inode,
-		  struct stat *buf)
+		  struct stat *buf,
+                  struct stat *preparent,
+                  struct stat *postparent)
 {
 	int ret = 0;
 	unify_local_t *local = frame->local;
@@ -1592,7 +1607,9 @@ unify_ns_create_cbk (call_frame_t *frame,
 		     int32_t op_errno,
 		     fd_t *fd,
 		     inode_t *inode,
-		     struct stat *buf)
+		     struct stat *buf,
+                     struct stat *preparent,
+                     struct stat *postparent)
 {
 	struct sched_ops *sched_ops = NULL;
 	xlator_t *sched_xl = NULL;
@@ -1921,6 +1938,69 @@ unify_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd,
 
 
 /**
+ * unify_ftruncate_cbk -
+ */
+int32_t
+unify_ftruncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                     int32_t op_ret, int32_t op_errno, struct stat *buf)
+{
+	int32_t callcnt = 0;
+	unify_private_t *priv = this->private;
+	unify_local_t *local = frame->local;
+	call_frame_t *prev_frame = cookie;
+
+	LOCK (&frame->lock);
+	{
+		callcnt = --local->call_count;
+
+		if (op_ret == -1) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"child(%s): path(%s): %s",
+				prev_frame->this->name,
+				(local->loc1.path)?local->loc1.path:"",
+				strerror (op_errno));
+			local->op_errno = op_errno;
+			if (!((op_errno == ENOENT) && priv->optimist))
+				local->op_ret = -1;
+		}
+
+		if (op_ret >= 0) {
+			if (NS (this) == prev_frame->this) {
+				local->st_ino = buf->st_ino;
+				/* If the entry is directory, get the
+				   stat from NS node */
+				if (S_ISDIR (buf->st_mode) ||
+				    !local->stbuf.st_blksize) {
+					local->stbuf = *buf;
+				}
+			}
+
+			if ((!S_ISDIR (buf->st_mode)) &&
+			    (NS (this) != prev_frame->this)) {
+				/* If file, take the stat info from
+				   Storage node. */
+				local->stbuf = *buf;
+			}
+		}
+	}
+	UNLOCK (&frame->lock);
+
+	if (!callcnt) {
+		if (local->st_ino)
+			local->stbuf.st_ino = local->st_ino;
+		else
+			local->op_ret = -1;
+		unify_local_wipe (local);
+		STACK_UNWIND (frame, local->op_ret, local->op_errno,
+			      &local->stbuf);
+	}
+
+	return 0;
+}
+
+
+
+/**
  * unify_truncate_cbk - 
  */
 int32_t
@@ -1929,7 +2009,8 @@ unify_truncate_cbk (call_frame_t *frame,
 		    xlator_t *this,
 		    int32_t op_ret,
 		    int32_t op_errno,
-		    struct stat *buf)
+		    struct stat *prebuf,
+                    struct stat *postbuf)
 {
 	int32_t callcnt = 0;
 	unify_private_t *priv = this->private;
@@ -1953,20 +2034,20 @@ unify_truncate_cbk (call_frame_t *frame,
 
 		if (op_ret >= 0) {
 			if (NS (this) == prev_frame->this) {
-				local->st_ino = buf->st_ino;
+				local->st_ino = postbuf->st_ino;
 				/* If the entry is directory, get the 
 				   stat from NS node */
-				if (S_ISDIR (buf->st_mode) || 
+				if (S_ISDIR (postbuf->st_mode) ||
 				    !local->stbuf.st_blksize) {
-					local->stbuf = *buf;
+					local->stbuf = *postbuf;
 				}
 			}
 
-			if ((!S_ISDIR (buf->st_mode)) && 
+			if ((!S_ISDIR (postbuf->st_mode)) &&
 			    (NS (this) != prev_frame->this)) {
 				/* If file, take the stat info from 
 				   Storage node. */
-				local->stbuf = *buf;
+				local->stbuf = *postbuf;
 			}
 		}
 	}
@@ -2027,7 +2108,7 @@ unify_truncate (call_frame_t *frame,
 		}
       
 		/* Don't send truncate to NS node */
-		STACK_WIND (frame, unify_truncate_cbk, NS(this),
+		STACK_WIND (frame, unify_ftruncate_cbk, NS(this),
 			    NS(this)->fops->stat, loc);
 		callcnt--;
 
@@ -2057,9 +2138,10 @@ unify_readlink_cbk (call_frame_t *frame,
 		    xlator_t *this,
 		    int32_t op_ret,
 		    int32_t op_errno,
-		    const char *path)
+		    const char *path,
+                    struct stat *sbuf)
 {
-	STACK_UNWIND (frame, op_ret, op_errno, path);
+	STACK_UNWIND (frame, op_ret, op_errno, path, sbuf);
 	return 0;
 }
 
@@ -2117,7 +2199,9 @@ unify_unlink_cbk (call_frame_t *frame,
 		  void *cookie,
 		  xlator_t *this,
 		  int32_t op_ret,
-		  int32_t op_errno)
+		  int32_t op_errno,
+                  struct stat *preparent,
+                  struct stat *postparent)
 {
 	int32_t callcnt = 0;
 	unify_private_t *priv = this->private;
@@ -2245,9 +2329,10 @@ unify_writev_cbk (call_frame_t *frame,
 		  xlator_t *this,
 		  int32_t op_ret,
 		  int32_t op_errno,
-		  struct stat *stbuf)
+                  struct stat *prebuf,
+		  struct stat *postbuf)
 {
-	STACK_UNWIND (frame, op_ret, op_errno, stbuf);
+	STACK_UNWIND (frame, op_ret, op_errno, prebuf, postbuf);
 	return 0;
 }
 
@@ -2307,11 +2392,11 @@ unify_ftruncate (call_frame_t *frame,
 
 	local->call_count = 2;
   
-	STACK_WIND (frame, unify_truncate_cbk, 
+	STACK_WIND (frame, unify_truncate_cbk,
 		    child, child->fops->ftruncate,
 		    fd, offset);
   
-	STACK_WIND (frame, unify_truncate_cbk, 
+	STACK_WIND (frame, unify_ftruncate_cbk,
 		    NS(this), NS(this)->fops->fstat,
 		    fd);
   
@@ -2363,9 +2448,11 @@ unify_fsync_cbk (call_frame_t *frame,
 		 void *cookie,
 		 xlator_t *this,
 		 int32_t op_ret,
-		 int32_t op_errno)
+		 int32_t op_errno,
+                 struct stat *prebuf,
+                 struct stat *postbuf)
 {
-	STACK_UNWIND (frame, op_ret, op_errno);
+	STACK_UNWIND (frame, op_ret, op_errno, prebuf, postbuf);
 	return 0;
 }
 
@@ -3015,7 +3102,9 @@ unify_mknod_unlink_cbk (call_frame_t *frame,
 			void *cookie,
 			xlator_t *this,
 			int32_t op_ret,
-			int32_t op_errno)
+			int32_t op_errno,
+                        struct stat *preparent,
+                        struct stat *postparent)
 {
 	unify_local_t *local = frame->local;
 
@@ -3039,7 +3128,9 @@ unify_mknod_cbk (call_frame_t *frame,
 		 int32_t op_ret,
 		 int32_t op_errno,
 		 inode_t *inode,
-		 struct stat *buf)
+                 struct stat *buf,
+                 struct stat *preparent,
+                 struct stat *postparent)
 {
 	unify_local_t *local = frame->local;
 
@@ -3073,7 +3164,9 @@ unify_ns_mknod_cbk (call_frame_t *frame,
 		    int32_t op_ret,
 		    int32_t op_errno,
 		    inode_t *inode,
-		    struct stat *buf)
+                    struct stat *buf,
+                    struct stat *preparent,
+                    struct stat *postparent)
 {
 	struct sched_ops *sched_ops = NULL;
 	xlator_t *sched_xl = NULL;
@@ -3177,7 +3270,9 @@ unify_symlink_unlink_cbk (call_frame_t *frame,
 			  void *cookie,
 			  xlator_t *this,
 			  int32_t op_ret,
-			  int32_t op_errno)
+			  int32_t op_errno,
+                          struct stat *preparent,
+                          struct stat *postparent)
 {
 	unify_local_t *local = frame->local;
 	if (op_ret == -1)
@@ -3199,7 +3294,9 @@ unify_symlink_cbk (call_frame_t *frame,
 		   int32_t op_ret,
 		   int32_t op_errno,
 		   inode_t *inode,
-		   struct stat *buf)
+                   struct stat *buf,
+                   struct stat *preparent,
+                   struct stat *postparent)
 {
 	unify_local_t *local = frame->local;
 
@@ -3238,7 +3335,9 @@ unify_ns_symlink_cbk (call_frame_t *frame,
 		      int32_t op_ret,
 		      int32_t op_errno,
 		      inode_t *inode,
-		      struct stat *buf)
+                      struct stat *buf,
+                      struct stat *preparent,
+                      struct stat *postparent)
 {
 
 	struct sched_ops *sched_ops = NULL;
@@ -3347,7 +3446,9 @@ unify_rename_unlink_cbk (call_frame_t *frame,
 			 void *cookie,
 			 xlator_t *this,
 			 int32_t op_ret,
-			 int32_t op_errno)
+			 int32_t op_errno,
+                         struct stat *preparent,
+                         struct stat *postparent)
 {
 	int32_t callcnt = 0;
 	unify_local_t *local = frame->local;
@@ -3382,7 +3483,11 @@ unify_ns_rename_undo_cbk (call_frame_t *frame,
 			  xlator_t *this,
 			  int32_t op_ret,
 			  int32_t op_errno,
-			  struct stat *buf)
+			  struct stat *buf,
+                          struct stat *preoldparent,
+                          struct stat *postoldparent,
+                          struct stat *prenewparent,
+                          struct stat *postnewparent)
 {
 	unify_local_t *local = frame->local;
 
@@ -3405,7 +3510,11 @@ unify_rename_cbk (call_frame_t *frame,
 		  xlator_t *this,
 		  int32_t op_ret,
 		  int32_t op_errno,
-		  struct stat *buf)
+		  struct stat *buf,
+                  struct stat *preoldparent,
+                  struct stat *postoldparent,
+                  struct stat *prenewparent,
+                  struct stat *postnewparent)
 {
 	int32_t index = 0;
 	int32_t callcnt = 0;
@@ -3561,7 +3670,11 @@ unify_ns_rename_cbk (call_frame_t *frame,
 		     xlator_t *this,
 		     int32_t op_ret,
 		     int32_t op_errno,
-		     struct stat *buf)
+		     struct stat *buf,
+                     struct stat *preoldparent,
+                     struct stat *postoldparent,
+                     struct stat *prenewparent,
+                     struct stat *postnewparent)
 {
 	int32_t index = 0;
 	int32_t callcnt = 0;
@@ -3680,7 +3793,9 @@ unify_link_cbk (call_frame_t *frame,
 		int32_t op_ret,
 		int32_t op_errno,
 		inode_t *inode,
-		struct stat *buf)
+                struct stat *buf,
+                struct stat *preparent,
+                struct stat *postparent)
 {
 	unify_local_t *local = frame->local;
 
@@ -3704,7 +3819,9 @@ unify_ns_link_cbk (call_frame_t *frame,
 		   int32_t op_ret,
 		   int32_t op_errno,
 		   inode_t *inode,
-		   struct stat *buf)
+                   struct stat *buf,
+                   struct stat *preparent,
+                   struct stat *postparent)
 {
 	unify_private_t *priv = this->private;
 	unify_local_t *local = frame->local;