Added all files

7 files changed, 9224 insertions, 0 deletions

diff --git a/xlators/protocol/server/Makefile.am b/xlators/protocol/server/Makefile.am
new file mode 100644
index 00000000000..d471a3f9243
--- /dev/null
+++ b/xlators/protocol/server/Makefile.am
@@ -0,0 +1,3 @@
+SUBDIRS = src
+
+CLEANFILES = 
diff --git a/xlators/protocol/server/src/Makefile.am b/xlators/protocol/server/src/Makefile.am
new file mode 100644
index 00000000000..dcd92aeedd9
--- /dev/null
+++ b/xlators/protocol/server/src/Makefile.am
@@ -0,0 +1,18 @@
+
+xlator_LTLIBRARIES = server.la
+xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/protocol
+
+server_la_LDFLAGS = -module -avoidversion
+
+server_la_SOURCES = server-protocol.c server-dentry.c server-helpers.c
+server_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
+
+noinst_HEADERS = server-protocol.h server-helpers.h
+
+AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS) \
+	-I$(top_srcdir)/libglusterfs/src -shared -nostartfiles \
+	-DDATADIR=\"$(localstatedir)\" -DCONFDIR=\"$(sysconfdir)/glusterfs\"  \
+	$(GF_CFLAGS)
+
+CLEANFILES = 
+
diff --git a/xlators/protocol/server/src/server-dentry.c b/xlators/protocol/server/src/server-dentry.c
new file mode 100644
index 00000000000..d3a69a393fc
--- /dev/null
+++ b/xlators/protocol/server/src/server-dentry.c
@@ -0,0 +1,413 @@
+#include "glusterfs.h"
+#include "xlator.h"
+#include "server-protocol.h"
+#include "server-helpers.h"
+#include <libgen.h>
+
+/* SERVER_DENTRY_STATE_PREPARE - prepare a fresh state for use
+ *
+ * @state    - an empty state
+ * @loc      - loc_t which needs to resolved
+ * @parent   - most immediate parent of @loc available in dentry cache
+ * @resolved - component of @loc->path which has been resolved
+ *             through dentry cache
+ */
+#define SERVER_DENTRY_STATE_PREPARE(_state,_loc,_parent,_resolved) do {	\
+		size_t pathlen = 0;					\
+		size_t resolvedlen = 0;					\
+		char *path = NULL;					\
+		int pad = 0;						\
+		pathlen   = strlen (_loc->path) + 1;			\
+		path = CALLOC (1, pathlen);				\
+		_state->loc.parent = inode_ref (_parent);		\
+		_state->loc.inode  = inode_new (_state->itable);	\
+		if (_resolved) {					\
+			resolvedlen = strlen (_resolved);		\
+			strncpy (path, _resolved, resolvedlen);		\
+			_state->resolved = memdup (path, pathlen);	\
+			if (resolvedlen == 1) /* only root resolved */	\
+				pad = 0;				\
+			else {						\
+				pad = 1;				\
+				path[resolvedlen] = '/';		\
+			}						\
+			strcpy_till (path + resolvedlen + pad, loc->path + resolvedlen + pad, '/'); \
+		} else {						\
+			strncpy (path, _loc->path, pathlen);		\
+		}							\
+		_state->loc.path = path;				\
+		_state->loc.name = strrchr (path, '/');			\
+		if (_state->loc.name)					\
+			_state->loc.name++;				\
+		_state->path = strdup (_loc->path);			\
+	}while (0);
+
+/* SERVER_DENTRY_UPDATE_STATE - update a server_state_t, to prepare state
+ *                              for new lookup
+ *
+ * @state - state to be updated.
+ */
+#define SERVER_DENTRY_UPDATE_STATE(_state) do {				\
+		char *path = NULL;					\
+		size_t pathlen = 0;					\
+		strcpy (_state->resolved, _state->loc.path);		\
+		pathlen = strlen (_state->loc.path);			\
+		if (!strcmp (_state->resolved, _state->path)) {		\
+			free (_state->resolved);			\
+			_state->resolved = NULL;			\
+			goto resume;					\
+		}							\
+									\
+		path = (char *)(_state->loc.path + pathlen);		\
+		path[0] = '/';						\
+		strcpy_till (path + 1,					\
+			     _state->path + pathlen + 1, '/');		\
+		_state->loc.name = strrchr (_state->loc.path, '/');	\
+		if (_state->loc.name)					\
+			_state->loc.name++;				\
+		inode_unref (_state->loc.parent);			\
+		_state->loc.parent = inode_ref (_state->loc.inode);	\
+		inode_unref (_state->loc.inode);			\
+		_state->loc.inode = inode_new (_state->itable);		\
+	}while (0);
+
+/* NOTE: should be used only for a state which was created by __do_path_resolve
+ *       using any other state will result in double free corruption.
+ */
+#define SERVER_STATE_CLEANUP(_state) do {	\
+		if (_state->resolved)		\
+			free (_state->resolved);	\
+		if (_state->path)		\
+			free (_state->path);	\
+		server_loc_wipe (&_state->loc);	\
+		free_state (_state);		\
+	} while (0);
+
+/* strcpy_till - copy @dname to @dest, until 'delim' is encountered in @dest
+ * @dest - destination string
+ * @dname - source string
+ * @delim - delimiter character
+ *
+ * return - NULL is returned if '0' is encountered in @dname, otherwise returns
+ *          a pointer to remaining string begining in @dest.
+ */
+static char *
+strcpy_till (char *dest, const char *dname, char delim)
+{
+	char *src = NULL;
+	int idx = 0;
+	char *ret = NULL;
+
+	src = (char *)dname;
+	while (src[idx] && (src[idx] != delim)) {
+		dest[idx] = src[idx];
+		idx++;
+	}
+
+	dest[idx] = 0;
+
+	if (src[idx] == 0)
+		ret = NULL;
+	else
+		ret = &(src[idx]);
+
+	return ret;
+}
+
+/* __server_path_to_parenti - derive parent inode for @path. if immediate parent is
+ *                            not available in the dentry cache, return nearest
+ *                            available parent inode and set @reslv to the path of
+ *                            the returned directory.
+ *
+ * @itable - inode table
+ * @path   - path whose parent has to be looked up.
+ * @reslv  - if immediate parent is not available, reslv will be set to path of the
+ *           resolved parent.
+ *
+ * return - should never return NULL. should at least return '/' inode.
+ */
+static inode_t *
+__server_path_to_parenti (inode_table_t *itable,
+                          const char *path,
+                          char **reslv)
+{
+        char *resolved_till = NULL;
+        char *strtokptr = NULL;
+        char *component = NULL;
+        char *next_component = NULL;
+        char *pathdup = NULL;
+        inode_t *curr = NULL;
+        inode_t *parent = NULL;
+        size_t pathlen = 0;
+
+
+        pathlen = STRLEN_0 (path);
+        resolved_till = CALLOC (1, pathlen);
+
+        GF_VALIDATE_OR_GOTO("server-dentry", resolved_till, out);
+        pathdup = strdup (path);
+        GF_VALIDATE_OR_GOTO("server-dentry", pathdup, out);
+
+        parent = inode_ref (itable->root);
+        curr = NULL;
+
+        component = strtok_r (pathdup, "/", &strtokptr);
+
+        while (component) {
+                curr = inode_search (itable, parent->ino, component);
+                if (!curr) {
+                        /* if current component was the last component
+                           set it to NULL                                                           
+			*/
+                        component = strtok_r (NULL, "/", &strtokptr);
+                        break;
+                }
+
+                /* It is OK to append the component even if it is the                               
+                   last component in the path, because, if 'next_component'
+                   returns NULL, @parent will remain the same and
+                   @resolved_till will not be sent back                                             
+		*/
+
+                strcat (resolved_till, "/");
+                strcat (resolved_till, component);
+
+                next_component = strtok_r (NULL, "/", &strtokptr);
+
+                if (next_component) {
+                        inode_unref (parent);
+                        parent = curr;
+                        curr = NULL;
+                } else {
+                        /* will break */
+                        inode_unref (curr);
+                }
+
+                component = next_component;
+        }
+
+        free (pathdup);
+
+        if (component) {
+                *reslv = resolved_till;
+        } else {
+                free (resolved_till);
+        }
+out:
+        return parent;
+}
+
+
+/* __do_path_resolve_cbk -
+ *
+ * @frame -
+ * @cookie -
+ * @this -
+ * @op_ret -
+ * @op_errno -
+ * @inode -
+ * @stbuf -
+ * @dict -
+ *
+ */
+static int32_t
+__do_path_resolve_cbk (call_frame_t *frame,
+		       void *cookie,
+		       xlator_t *this,
+		       int32_t op_ret,
+		       int32_t op_errno,
+		       inode_t *inode,
+		       struct stat *stbuf,
+		       dict_t *dict)
+{
+	server_state_t *state = NULL;
+	call_stub_t *stub = NULL;
+	inode_t *parent = NULL;
+
+	stub = frame->local;
+	state = CALL_STATE(frame);
+	
+	parent = state->loc.parent;
+
+	if (op_ret == -1) {
+		if (strcmp (state->path, state->loc.path))
+			parent = NULL;
+		
+		server_stub_resume (stub, op_ret, op_errno, NULL, parent);
+		goto cleanup;
+	} else {
+		if (inode->ino == 0) {
+			gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+				"looked up for %s (%"PRId64"/%s)",
+				state->loc.path, state->loc.parent->ino, state->loc.name);
+			inode_link (inode, state->loc.parent, state->loc.name, stbuf);
+			inode_lookup (inode);
+		}
+
+		if (state->resolved) {
+			SERVER_DENTRY_UPDATE_STATE(state);
+
+			gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+				"looking up for %s (%"PRId64"/%s)",
+				state->loc.path, state->loc.parent->ino, state->loc.name);
+
+			STACK_WIND (frame,
+				    __do_path_resolve_cbk,
+				    BOUND_XL(frame),
+				    BOUND_XL(frame)->fops->lookup,
+				    &(state->loc),
+				    0);
+
+			goto out;
+		}
+	resume:
+		/* we are done, call stub_resume() to do rest of the job */
+		server_stub_resume (stub, op_ret, op_errno, inode, parent);
+	cleanup:
+		SERVER_STATE_CLEANUP(state);
+		/* stub will be freed by stub_resume, leave no traces */
+		frame->local = NULL;
+		STACK_DESTROY (frame->root);
+	}
+out:
+	return 0;
+}
+
+/* __do_path_resolve - resolve @loc->path into @loc->inode and @loc->parent. also
+ *                     update the dentry cache
+ *
+ * @stub - call stub to resume after resolving @loc->path
+ * @loc  - loc to resolve before resuming @stub.
+ *
+ * return - return value of __do_path_resolve doesn't matter to the caller, if @stub
+ *          is not NULL.
+ */
+static int32_t
+__do_path_resolve (call_stub_t *stub,
+		   const loc_t *loc)
+{
+	int32_t         ret = -1;
+	char           *resolved  = NULL;
+	call_frame_t   *new_frame = NULL;
+	server_state_t *state = NULL, *new_state = NULL;
+	inode_t        *parent = NULL;
+	
+	state = CALL_STATE(stub->frame);
+	parent = loc->parent;
+	if (parent) {
+		inode_ref (parent);
+		gf_log (BOUND_XL(stub->frame)->name, GF_LOG_DEBUG,
+			"loc->parent(%"PRId64") already present. sending lookup "
+			"for %"PRId64"/%s", parent->ino, parent->ino, loc->name);
+		resolved = strdup (loc->path);
+		resolved = dirname (resolved);
+	} else {
+		parent = __server_path_to_parenti (state->itable, loc->path, &resolved);
+	}
+
+	if (parent == NULL) {
+		/* fire in the bush.. run! run!! run!!! */
+		gf_log ("server",
+			GF_LOG_CRITICAL,
+			"failed to get parent inode number");
+		goto panic;
+	}		
+
+	if (resolved) {
+		gf_log (BOUND_XL(stub->frame)->name,
+			GF_LOG_DEBUG,
+			"resolved path(%s) till %"PRId64"(%s). "
+			"sending lookup for remaining path",
+			loc->path, parent->ino, resolved);
+	}
+	
+	{
+		new_frame = server_copy_frame (stub->frame);
+		new_state = CALL_STATE(new_frame);
+
+		SERVER_DENTRY_STATE_PREPARE(new_state, loc, parent, resolved);
+		
+		if (parent)
+			inode_unref (parent); /* __server_path_to_parenti()'s  inode_ref */
+		free (resolved);
+		/* now interpret state as:
+		 * state->path - compelete pathname to resolve
+		 * state->resolved - pathname resolved from dentry cache
+		 */
+		new_frame->local = stub;
+		STACK_WIND (new_frame,
+			    __do_path_resolve_cbk,
+			    BOUND_XL(new_frame),
+			    BOUND_XL(new_frame)->fops->lookup,
+			    &(new_state->loc),
+			    0);
+		goto out;
+	}
+panic:
+	server_stub_resume (stub, -1, ENOENT, NULL, NULL);	
+out:
+	return ret;
+}
+
+
+/*
+ * do_path_lookup - transform a pathname into inode, with the compelete
+ *                  dentry tree upto inode built.
+ *
+ * @stub - call stub to resume after completing pathname to inode transform
+ * @loc  - location. valid fields that do_path_lookup() uses in @loc are
+ *         @loc->path - pathname
+ *         @loc->ino  - inode number
+ *
+ * return - do_path_lookup returns only after complete dentry tree is built
+ *          upto @loc->path.
+ */
+int32_t
+do_path_lookup (call_stub_t *stub,
+		const loc_t *loc)
+{
+	char       *pathname  = NULL;
+	char       *directory = NULL;
+	inode_t    *inode = NULL;
+	inode_t    *parent = NULL;
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(stub->frame);
+
+	inode = inode_from_path (state->itable, loc->path);
+	pathname  = strdup (loc->path);
+	directory = dirname (pathname);
+	parent = inode_from_path (state->itable, directory);
+	
+	if (inode && parent) {
+		gf_log (BOUND_XL(stub->frame)->name,
+			GF_LOG_DEBUG,
+			"resolved path(%s) to %"PRId64"/%"PRId64"(%s)",
+			loc->path, parent->ino, inode->ino, loc->name);
+		server_stub_resume (stub, 0, 0, inode, parent);
+		inode_unref (inode);
+		inode_unref (parent);
+	} else {
+		gf_log (BOUND_XL(stub->frame)->name,
+			GF_LOG_DEBUG,
+			"resolved path(%s) to %p(%"PRId64")/%p(%"PRId64")",
+			loc->path, parent, (parent ? parent->ino : 0), 
+			inode, (inode ? inode->ino : 0));
+		if (parent) {
+			inode_unref (parent);
+		} else if (inode) {
+			inode_unref (inode);
+			gf_log (BOUND_XL(stub->frame)->name,
+				GF_LOG_ERROR,
+				"undesired behaviour. inode(%"PRId64") for %s "
+				"exists without parent (%s)", 
+				inode->ino, loc->path, directory);
+		}
+		__do_path_resolve (stub, loc);
+	}
+	
+	if (pathname)
+		free (pathname);
+
+	return 0;
+}
diff --git a/xlators/protocol/server/src/server-helpers.c b/xlators/protocol/server/src/server-helpers.c
new file mode 100644
index 00000000000..b51c11aa994
--- /dev/null
+++ b/xlators/protocol/server/src/server-helpers.c
@@ -0,0 +1,586 @@
+/*
+  Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "server-protocol.h"
+#include "server-helpers.h"
+
+
+/* server_loc_fill - derive a loc_t for a given inode number
+ *
+ * NOTE: make sure that @loc is empty, because any pointers it holds with reference will
+ *       be leaked after returning from here.
+ */
+int
+server_loc_fill (loc_t *loc, server_state_t *state,
+  		 ino_t ino, ino_t par,
+  		 const char *name, const char *path)
+{
+  	inode_t *inode = NULL;
+  	inode_t *parent = NULL;
+  	int32_t  ret = -1;
+	char    *dentry_path = NULL;
+
+
+  	GF_VALIDATE_OR_GOTO ("server", loc, out);
+  	GF_VALIDATE_OR_GOTO ("server", state, out);
+  	GF_VALIDATE_OR_GOTO ("server", path, out);
+
+  	/* anything beyond this point is success */
+  	ret = 0;
+	loc->ino = ino;
+  	inode = loc->inode;
+  	if (inode == NULL) {
+  		if (ino)
+  			inode = inode_search (state->itable, ino, NULL);
+
+  		if ((inode == NULL) &&
+  		    (par && name))
+  			inode = inode_search (state->itable, par, name);
+
+  		loc->inode = inode;
+  		if (inode)
+  			loc->ino = inode->ino;
+  	}
+
+  	parent = loc->parent;
+	if (parent == NULL) {
+		if (inode)
+			parent = inode_parent (inode, par, name);
+		else
+			parent = inode_search (state->itable, par, NULL);
+		loc->parent = parent;
+	}
+
+	if (name && parent) {
+		ret = inode_path (parent, name, &dentry_path);
+		if (ret < 0) {
+			gf_log (state->bound_xl->name, GF_LOG_DEBUG,
+				"failed to build path for %"PRId64"/%s: %s",
+				parent->ino, name, strerror (-ret));
+		}
+	} else if (inode) {
+		ret = inode_path (inode, NULL, &dentry_path);
+		if (ret < 0) {
+			gf_log (state->bound_xl->name, GF_LOG_DEBUG,
+				"failed to build path for %"PRId64": %s",
+				inode->ino, strerror (-ret));
+
+			inode_unref (loc->inode);
+			loc->inode = NULL;
+		}
+	}
+
+	if (dentry_path) {
+		if (strcmp (dentry_path, path)) {
+			gf_log (state->bound_xl->name, GF_LOG_DEBUG,
+				"paths differ for inode(%"PRId64"): "
+				"client path = %s. dentry path = %s",
+				ino, path, dentry_path);
+		}
+
+		loc->path = dentry_path;
+		loc->name = strrchr (loc->path, '/');
+		if (loc->name)
+			loc->name++;
+	} else {
+		loc->path = strdup (path);
+		loc->name = strrchr (loc->path, '/');
+		if (loc->name)
+			loc->name++;
+	}
+
+out:
+  	return ret;
+}
+
+/*
+ * stat_to_str - convert struct stat to a ASCII string
+ * @stbuf: struct stat pointer
+ *
+ * not for external reference
+ */
+char *
+stat_to_str (struct stat *stbuf)
+{
+	char *tmp_buf = NULL;
+
+	uint64_t dev = stbuf->st_dev;
+	uint64_t ino = stbuf->st_ino;
+	uint32_t mode = stbuf->st_mode;
+	uint32_t nlink = stbuf->st_nlink;
+	uint32_t uid = stbuf->st_uid;
+	uint32_t gid = stbuf->st_gid;
+	uint64_t rdev = stbuf->st_rdev;
+	uint64_t size = stbuf->st_size;
+	uint32_t blksize = stbuf->st_blksize;
+	uint64_t blocks = stbuf->st_blocks;
+	uint32_t atime = stbuf->st_atime;
+	uint32_t mtime = stbuf->st_mtime;
+	uint32_t ctime = stbuf->st_ctime;
+
+	uint32_t atime_nsec = ST_ATIM_NSEC(stbuf);
+	uint32_t mtime_nsec = ST_MTIM_NSEC(stbuf);
+	uint32_t ctime_nsec = ST_CTIM_NSEC(stbuf);
+
+
+	asprintf (&tmp_buf,
+		  GF_STAT_PRINT_FMT_STR,
+		  dev,
+		  ino,
+		  mode,
+		  nlink,
+		  uid,
+		  gid,
+		  rdev,
+		  size,
+		  blksize,
+		  blocks,
+		  atime,
+		  atime_nsec,
+		  mtime,
+		  mtime_nsec,
+		  ctime,
+		  ctime_nsec);
+
+	return tmp_buf;
+}
+
+
+void
+server_loc_wipe (loc_t *loc)
+{
+	if (loc->parent)
+		inode_unref (loc->parent);
+	if (loc->inode)
+		inode_unref (loc->inode);
+	if (loc->path)
+		free ((char *)loc->path);
+}
+
+void
+free_state (server_state_t *state)
+{
+	transport_t *trans = NULL;	
+
+	trans    = state->trans;
+
+	if (state->fd)
+		fd_unref (state->fd);
+
+	transport_unref (trans);
+	
+	if (state->xattr_req)
+		dict_unref (state->xattr_req);
+
+	FREE (state);
+}
+
+
+call_frame_t *
+server_copy_frame (call_frame_t *frame)
+{
+	call_frame_t *new_frame = NULL;
+	server_state_t *state = NULL, *new_state = NULL;
+
+	state = frame->root->state;
+
+	new_frame = copy_frame (frame);
+
+	new_state = CALLOC (1, sizeof (server_state_t));
+
+	new_frame->root->op    = frame->root->op;
+	new_frame->root->type  = frame->root->type;
+	new_frame->root->trans = state->trans;
+	new_frame->root->state = new_state;
+
+	new_state->bound_xl = state->bound_xl;
+	new_state->trans    = transport_ref (state->trans);
+	new_state->itable   = state->itable;
+
+	return new_frame;
+}
+
+int32_t
+gf_add_locker (struct _lock_table *table,
+	       loc_t *loc,
+	       fd_t *fd,
+	       pid_t pid)
+{
+	int32_t ret = -1;
+	struct _locker *new = NULL;
+	uint8_t dir = 0;
+
+	new = CALLOC (1, sizeof (struct _locker));
+	if (new == NULL) {
+		gf_log ("server", GF_LOG_ERROR,
+			"failed to allocate memory for \'struct _locker\'");
+		goto out;
+	}
+	INIT_LIST_HEAD (&new->lockers);
+
+	if (fd == NULL) {
+		loc_copy (&new->loc, loc);
+		dir = S_ISDIR (new->loc.inode->st_mode);
+	} else {
+		new->fd = fd_ref (fd);
+		dir = S_ISDIR (fd->inode->st_mode);
+	}
+
+	new->pid = pid;
+
+	LOCK (&table->lock);
+	{
+		if (dir)
+			list_add_tail (&new->lockers, &table->dir_lockers);
+		else
+			list_add_tail (&new->lockers, &table->file_lockers);
+	}
+	UNLOCK (&table->lock);
+out:
+	return ret;
+}
+
+int32_t
+gf_del_locker (struct _lock_table *table,
+	       loc_t *loc,
+	       fd_t *fd,
+	       pid_t pid)
+{
+	struct _locker *locker = NULL, *tmp = NULL;
+	int32_t ret = 0;
+	uint8_t dir = 0;
+	struct list_head *head = NULL;
+	struct list_head del;
+
+	INIT_LIST_HEAD (&del);
+
+	if (fd) {
+		dir = S_ISDIR (fd->inode->st_mode);
+	} else {
+		dir = S_ISDIR (loc->inode->st_mode);
+	}
+
+	LOCK (&table->lock);
+	{
+		if (dir) {
+			head = &table->dir_lockers;
+		} else {
+			head = &table->file_lockers;
+		}
+
+		list_for_each_entry_safe (locker, tmp, head, lockers) {
+			if (locker->fd &&
+			    fd &&
+			    (locker->fd == fd) && (locker->pid == pid)) {
+				list_move_tail (&locker->lockers, &del);
+			} else if (locker->loc.inode && 
+				   loc &&
+				   (locker->loc.inode == loc->inode) &&
+				   (locker->pid == pid)) {
+				list_move_tail (&locker->lockers, &del);
+			}
+		}
+	}
+	UNLOCK (&table->lock);
+
+	tmp = NULL;
+	locker = NULL;
+
+	list_for_each_entry_safe (locker, tmp, &del, lockers) {
+		list_del_init (&locker->lockers);
+		if (locker->fd)
+			fd_unref (locker->fd);
+		else
+			loc_wipe (&locker->loc);
+
+		free (locker);
+	}
+
+	return ret;
+}
+
+int32_t
+gf_direntry_to_bin (dir_entry_t *head,
+		    char **bufferp)
+{
+	dir_entry_t *trav = NULL;
+	uint32_t len = 0;
+	uint32_t this_len = 0;
+	char *buffer = NULL;
+	size_t buflen = -1;
+	char *ptr = NULL;
+	char *tmp_buf = NULL;
+
+	trav = head->next;
+	while (trav) {
+		len += strlen (trav->name);
+		len += 1;
+		len += strlen (trav->link);
+		len += 1; /* for '\n' */
+		len += 256; // max possible for statbuf;
+		trav = trav->next;
+	}
+
+	buffer = CALLOC (1, len);
+	if (buffer == NULL) {
+		gf_log ("server", GF_LOG_ERROR,
+			"failed to allocate memory for buffer");
+		goto out;
+	}
+
+	ptr = buffer;
+	trav = head->next;
+	while (trav) {
+		tmp_buf = stat_to_str (&trav->buf);
+		/* tmp_buf will have \n before \0 */
+
+		this_len = sprintf (ptr, "%s/%s%s\n",
+				    trav->name, tmp_buf,
+				    trav->link);
+
+		FREE (tmp_buf);
+		trav = trav->next;
+		ptr += this_len;
+	}
+	if (bufferp)
+		*bufferp = buffer;
+	buflen = strlen (buffer);
+	
+out:
+	return buflen;
+}
+
+
+static struct _lock_table *
+gf_lock_table_new (void)
+{
+	struct _lock_table *new = NULL;
+
+	new = CALLOC (1, sizeof (struct _lock_table));
+	if (new == NULL) {
+		gf_log ("server-protocol", GF_LOG_CRITICAL,
+			"failed to allocate memory for new lock table");
+		goto out;
+	}
+	INIT_LIST_HEAD (&new->dir_lockers);
+	INIT_LIST_HEAD (&new->file_lockers);
+	LOCK_INIT (&new->lock);
+out:
+	return new;
+}
+
+
+int
+server_connection_destroy (xlator_t *this, server_connection_t *conn)
+{
+
+	call_frame_t      *frame = NULL, *tmp_frame = NULL;
+	xlator_t          *bound_xl = NULL;
+	int32_t            ret = -1;
+	server_state_t    *state = NULL;
+	struct list_head   file_lockers;
+	struct list_head   dir_lockers;
+	struct _lock_table *ltable = NULL;
+	struct _locker     *locker = NULL, *tmp = NULL;
+	struct flock        flock = {0,};
+
+
+	bound_xl = (xlator_t *) (conn->bound_xl);
+
+	if (bound_xl) {
+		/* trans will have ref_count = 1 after this call, but its 
+		   ok since this function is called in 
+		   GF_EVENT_TRANSPORT_CLEANUP */
+		frame = create_frame (this, this->ctx->pool);
+
+		pthread_mutex_lock (&(conn->lock));
+		{
+			if (conn->ltable) {
+				ltable = conn->ltable;
+				conn->ltable = NULL;
+			}
+		}
+		pthread_mutex_unlock (&conn->lock);
+
+		INIT_LIST_HEAD (&file_lockers);
+		INIT_LIST_HEAD (&dir_lockers);
+
+		LOCK (&ltable->lock);
+		{
+			list_splice_init (&ltable->file_lockers, 
+					  &file_lockers);
+
+			list_splice_init (&ltable->dir_lockers, &dir_lockers);
+		}
+		UNLOCK (&ltable->lock);
+		free (ltable);
+
+		flock.l_type  = F_UNLCK;
+		flock.l_start = 0;
+		flock.l_len   = 0;
+		list_for_each_entry_safe (locker, 
+					  tmp, &file_lockers, lockers) {
+			tmp_frame = copy_frame (frame);
+			/* 
+			   pid = 0 is a special case that tells posix-locks
+			   to release all locks from this transport
+			*/
+			tmp_frame->root->pid = 0;
+			tmp_frame->root->trans = conn;
+
+			if (locker->fd) {
+				STACK_WIND (tmp_frame, server_nop_cbk,
+					    bound_xl,
+					    bound_xl->fops->finodelk,
+					    locker->fd, F_SETLK, &flock);
+				fd_unref (locker->fd);
+			} else {
+				STACK_WIND (tmp_frame, server_nop_cbk,
+					    bound_xl,
+					    bound_xl->fops->inodelk,
+					    &(locker->loc), F_SETLK, &flock);
+				loc_wipe (&locker->loc);
+			}
+
+			list_del_init (&locker->lockers);
+			free (locker);
+		}
+
+		tmp = NULL;
+		locker = NULL;
+		list_for_each_entry_safe (locker, tmp, &dir_lockers, lockers) {
+			tmp_frame = copy_frame (frame);
+
+			tmp_frame->root->pid = 0;
+			tmp_frame->root->trans = conn;
+
+			if (locker->fd) {
+				STACK_WIND (tmp_frame, server_nop_cbk,
+					    bound_xl,
+					    bound_xl->fops->fentrylk,
+					    locker->fd, NULL, 
+					    ENTRYLK_UNLOCK, ENTRYLK_WRLCK);
+				fd_unref (locker->fd);
+			} else {
+				STACK_WIND (tmp_frame, server_nop_cbk,
+					    bound_xl,
+					    bound_xl->fops->entrylk,
+					    &(locker->loc), NULL, 
+					    ENTRYLK_UNLOCK, ENTRYLK_WRLCK);
+				loc_wipe (&locker->loc);
+			}
+
+			list_del_init (&locker->lockers);
+			free (locker);
+		}
+
+		state = CALL_STATE (frame);
+		if (state)
+			free (state);
+		STACK_DESTROY (frame->root);
+
+		pthread_mutex_lock (&(conn->lock));
+		{
+			if (conn->fdtable) {
+				gf_fd_fdtable_destroy (conn->fdtable);
+				conn->fdtable = NULL;
+			}
+		}
+		pthread_mutex_unlock (&conn->lock);
+
+	}
+
+	gf_log (this->name, GF_LOG_INFO, "destroyed connection of %s",
+		conn->id);
+
+	FREE (conn->id);
+	FREE (conn);
+
+	return ret;
+}
+
+
+server_connection_t *
+server_connection_get (xlator_t *this, const char *id)
+{
+	server_connection_t *conn = NULL;
+	server_connection_t *trav = NULL;
+	server_conf_t       *conf = NULL;
+
+	conf = this->private;
+
+	pthread_mutex_lock (&conf->mutex);
+	{
+		list_for_each_entry (trav, &conf->conns, list) {
+			if (!strcmp (id, trav->id)) {
+				conn = trav;
+				break;
+			}
+		}
+
+		if (!conn) {
+			conn = (void *) CALLOC (1, sizeof (*conn));
+
+			conn->id = strdup (id);
+			conn->fdtable = gf_fd_fdtable_alloc ();
+			conn->ltable  = gf_lock_table_new ();
+
+			pthread_mutex_init (&conn->lock, NULL);
+
+			list_add (&conn->list, &conf->conns);
+		}
+
+		conn->ref++;
+	}
+	pthread_mutex_unlock (&conf->mutex);
+
+	return conn;
+}
+
+
+void
+server_connection_put (xlator_t *this, server_connection_t *conn)
+{
+	server_conf_t       *conf = NULL;
+	server_connection_t *todel = NULL;
+
+	conf = this->private;
+
+	pthread_mutex_lock (&conf->mutex);
+	{
+		conn->ref--;
+
+		if (!conn->ref) {
+			list_del_init (&conn->list);
+			todel = conn;
+		}
+	}
+	pthread_mutex_unlock (&conf->mutex);
+
+	if (todel) {
+		server_connection_destroy (this, todel);
+	}
+
+	return;
+}
diff --git a/xlators/protocol/server/src/server-helpers.h b/xlators/protocol/server/src/server-helpers.h
new file mode 100644
index 00000000000..36c0ce98e40
--- /dev/null
+++ b/xlators/protocol/server/src/server-helpers.h
@@ -0,0 +1,77 @@
+/*
+  Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __SERVER_HELPERS_H__
+#define __SERVER_HELPERS_H__
+
+#define CALL_STATE(frame)   ((server_state_t *)frame->root->state)
+
+#define BOUND_XL(frame)     ((xlator_t *) CALL_STATE(frame)->bound_xl)
+
+#define TRANSPORT_FROM_FRAME(frame) ((transport_t *) CALL_STATE(frame)->trans)
+
+#define SERVER_CONNECTION(frame)  \
+	((server_connection_t *) TRANSPORT_FROM_FRAME(frame)->xl_private)
+
+#define SERVER_CONF(frame) \
+	((server_conf_t *)TRANSPORT_FROM_FRAME(frame)->xl->private)
+
+#define TRANSPORT_FROM_XLATOR(this) ((((server_conf_t *)this->private))->trans)
+
+#define INODE_LRU_LIMIT(this)						\
+	(((server_conf_t *)(this->private))->inode_lru_limit)
+
+#define IS_ROOT_INODE(inode) (inode == inode->table->root)
+
+#define IS_NOT_ROOT(pathlen) ((pathlen > 2)? 1 : 0)
+
+int32_t
+server_loc_fill (loc_t *loc,
+  		 server_state_t *state,
+  		 ino_t ino,
+  		 ino_t par,
+  		 const char *name,
+  		 const char *path);
+
+char *
+stat_to_str (struct stat *stbuf);
+
+call_frame_t *
+server_copy_frame (call_frame_t *frame);
+
+void free_state (server_state_t *state);
+
+void server_loc_wipe (loc_t *loc);
+
+int32_t
+gf_add_locker (struct _lock_table *table,
+	       loc_t *loc,
+	       fd_t *fd,
+	       pid_t pid);
+
+int32_t
+gf_del_locker (struct _lock_table *table,
+	       loc_t *loc,
+	       fd_t *fd,
+	       pid_t pid);
+
+int32_t
+gf_direntry_to_bin (dir_entry_t *head,
+		    char **bufferp);
+#endif /* __SERVER_HELPERS_H__ */
diff --git a/xlators/protocol/server/src/server-protocol.c b/xlators/protocol/server/src/server-protocol.c
new file mode 100644
index 00000000000..a5198c1ed07
--- /dev/null
+++ b/xlators/protocol/server/src/server-protocol.c
@@ -0,0 +1,7984 @@
+/*
+  Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+#include <time.h>
+#include <sys/uio.h>
+#include <sys/resource.h>
+
+#include <libgen.h>
+
+#include "transport.h"
+#include "fnmatch.h"
+#include "xlator.h"
+#include "protocol.h"
+#include "server-protocol.h"
+#include "server-helpers.h"
+#include "call-stub.h"
+#include "defaults.h"
+#include "list.h"
+#include "dict.h"
+#include "compat.h"
+#include "compat-errno.h"
+
+
+static void
+protocol_server_reply (call_frame_t *frame,
+                       int type, int op,
+                       gf_hdr_common_t *hdr, size_t hdrlen,
+                       struct iovec *vector, int count,
+                       dict_t *refs)
+{
+	server_state_t *state = NULL;
+	xlator_t *bound_xl = NULL;
+	transport_t *trans = NULL;
+
+	bound_xl = BOUND_XL(frame);
+	state    = CALL_STATE(frame);
+	trans    = state->trans;
+
+	hdr->callid = hton64 (frame->root->unique);
+	hdr->type   = hton32 (type);
+	hdr->op     = hton32 (op);
+
+	transport_submit (trans, (char *)hdr, hdrlen, vector, count, refs);
+	/* TODO: If transport submit fails, there is no reply sent to client, 
+	 * its bailed out as of now.. loggically, only this frame should fail. 
+	 */
+
+	STACK_DESTROY (frame->root);
+
+	if (state)
+		free_state (state);
+
+}
+
+
+/*
+ * server_fchmod_cbk
+ */
+int32_t
+server_fchmod_cbk (call_frame_t *frame,
+                   void *cookie,
+                   xlator_t *this,
+                   int32_t op_ret,
+                   int32_t op_errno,
+                   struct stat *stbuf)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_fchmod_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	server_state_t *state = NULL;
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret == 0) {
+		gf_stat_from_stat (&rsp->stat, stbuf);
+	} else {
+		state = CALL_STATE(frame);
+
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": FCHMOD %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_FCHMOD,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_fchmod
+ *
+ */
+int32_t
+server_fchmod (call_frame_t *frame,
+               xlator_t *bound_xl,
+               gf_hdr_common_t *hdr, size_t hdrlen,
+               char *buf, size_t buflen)
+{
+	server_connection_t *conn = NULL;
+	gf_fop_fchmod_req_t *req = NULL;
+	server_state_t *state = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		state->mode   = ntoh32 (req->mode);
+	}
+
+	GF_VALIDATE_OR_GOTO(bound_xl->name, state->fd, fail);
+
+	STACK_WIND (frame,
+		    server_fchmod_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->fchmod,
+		    state->fd,
+		    state->mode);
+
+	return 0;
+fail:
+	server_fchmod_cbk (frame, NULL, frame->this,
+			   -1, EINVAL, NULL);
+	return 0;
+}
+
+
+/*
+ * server_fchown_cbk
+ */
+int32_t
+server_fchown_cbk (call_frame_t *frame,
+                   void *cookie,
+                   xlator_t *this,
+                   int32_t op_ret,
+                   int32_t op_errno,
+                   struct stat *stbuf)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_fchown_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	server_state_t *state = NULL;
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+	
+	hdr->rsp.op_ret   = hton32 (op_ret);
+	gf_errno = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret == 0) {
+		gf_stat_from_stat (&rsp->stat, stbuf);
+	} else { 
+		state = CALL_STATE(frame);
+
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": FCHOWN %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_FCHOWN,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_fchown
+ *
+ */
+int32_t
+server_fchown (call_frame_t *frame,
+               xlator_t *bound_xl,
+               gf_hdr_common_t *hdr, size_t hdrlen,
+               char *buf, size_t buflen)
+{
+	server_connection_t *conn = NULL;
+	gf_fop_fchown_req_t *req = NULL;
+	server_state_t *state = NULL;
+
+	conn = SERVER_CONNECTION(frame);
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		state->uid   = ntoh32 (req->uid);
+		state->gid   = ntoh32 (req->gid);
+	}
+
+	GF_VALIDATE_OR_GOTO(bound_xl->name, state->fd, fail);
+
+	STACK_WIND (frame,
+		    server_fchown_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->fchown,
+		    state->fd,
+		    state->uid,
+		    state->gid);
+
+	return 0;
+fail:
+	server_fchown_cbk (frame, NULL, frame->this,
+			   -1, EINVAL, NULL);
+	return 0;
+}
+
+/*
+ * server_setdents_cbk - writedir callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ *
+ * not for external reference
+ */
+int32_t
+server_setdents_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno)
+{
+	gf_hdr_common_t       *hdr = NULL;
+	gf_fop_setdents_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret   = hton32 (op_ret);
+	gf_errno = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_SETDENTS,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_lk_cbk - lk callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @lock:
+ *
+ * not for external reference
+ */
+int32_t
+server_lk_cbk (call_frame_t *frame,
+               void *cookie,
+               xlator_t *this,
+               int32_t op_ret,
+               int32_t op_errno,
+               struct flock *lock)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_lk_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	server_state_t *state = NULL;
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret == 0) {
+		gf_flock_from_flock (&rsp->flock, lock);
+	} else if (op_errno != ENOSYS) {
+		state = CALL_STATE(frame);
+
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": LK %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_LK,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+int32_t
+server_inodelk_cbk (call_frame_t *frame, void *cookie,
+		    xlator_t *this, int32_t op_ret, int32_t op_errno)
+{
+	server_connection_t *conn = NULL;
+ 	gf_hdr_common_t *hdr = NULL;
+ 	gf_fop_inodelk_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+ 	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	state = CALL_STATE(frame);
+
+ 	hdrlen = gf_hdr_len (rsp, 0);
+ 	hdr    = gf_hdr_new (rsp, 0);
+ 	rsp    = gf_param (hdr);
+
+ 	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno = gf_errno_to_error (op_errno);
+ 	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret >= 0) {
+		if (state->flock.l_type == F_UNLCK)
+			gf_del_locker (conn->ltable,
+				       &state->loc, NULL, frame->root->pid);
+		else
+			gf_add_locker (conn->ltable,
+				       &state->loc, NULL, frame->root->pid);
+	} else if (op_errno != ENOSYS) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": INODELK %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+	
+	server_loc_wipe (&state->loc);
+
+ 	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_INODELK,
+ 			       hdr, hdrlen, NULL, 0, NULL);
+
+ 	return 0;
+}
+
+
+int32_t
+server_finodelk_cbk (call_frame_t *frame, void *cookie,
+		     xlator_t *this, int32_t op_ret, int32_t op_errno)
+{
+	server_connection_t *conn = NULL;
+ 	gf_hdr_common_t *hdr = NULL;
+ 	gf_fop_finodelk_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+ 	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	
+	conn = SERVER_CONNECTION(frame);
+
+ 	hdrlen = gf_hdr_len (rsp, 0);
+ 	hdr    = gf_hdr_new (rsp, 0);
+ 	rsp    = gf_param (hdr);
+
+ 	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno = gf_errno_to_error (op_errno);
+ 	hdr->rsp.op_errno = hton32 (gf_errno);
+	
+	state = CALL_STATE(frame);
+
+	if (op_ret >= 0) {
+		if (state->flock.l_type == F_UNLCK)
+			gf_del_locker (conn->ltable,
+				       NULL, state->fd, frame->root->pid);
+		else
+			gf_add_locker (conn->ltable,
+				       NULL, state->fd, frame->root->pid);
+	} else if (op_errno != ENOSYS) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": FINODELK %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+ 	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_FINODELK,
+ 			       hdr, hdrlen, NULL, 0, NULL);
+
+ 	return 0;
+}
+
+
+/*
+ * server_entrylk_cbk - 
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @lock:
+ *
+ * not for external reference
+ */
+int32_t
+server_entrylk_cbk (call_frame_t *frame, void *cookie,
+		    xlator_t *this, int32_t op_ret, int32_t op_errno)
+{
+	server_connection_t *conn = NULL;
+ 	gf_hdr_common_t      *hdr = NULL;
+ 	gf_fop_entrylk_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+ 	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	conn = SERVER_CONNECTION(frame);
+
+	state = CALL_STATE(frame);
+
+ 	hdrlen = gf_hdr_len (rsp, 0);
+ 	hdr    = gf_hdr_new (rsp, 0);
+ 	rsp    = gf_param (hdr);
+
+ 	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno = gf_errno_to_error (op_errno);
+ 	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret >= 0) {
+		if (state->cmd == ENTRYLK_UNLOCK)
+			gf_del_locker (conn->ltable,
+				       &state->loc, NULL, frame->root->pid);
+		else
+			gf_add_locker (conn->ltable,
+				       &state->loc, NULL, frame->root->pid);
+	} else if (op_errno != ENOSYS) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": INODELK %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+	
+	server_loc_wipe (&state->loc);
+
+ 	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_ENTRYLK,
+ 			       hdr, hdrlen, NULL, 0, NULL);
+
+ 	return 0;
+}
+
+
+int32_t
+server_fentrylk_cbk (call_frame_t *frame, void *cookie,
+		     xlator_t *this, int32_t op_ret, int32_t op_errno)
+{
+	server_connection_t *conn = NULL;
+ 	gf_hdr_common_t       *hdr = NULL;
+ 	gf_fop_fentrylk_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+ 	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	conn = SERVER_CONNECTION(frame);
+
+ 	hdrlen = gf_hdr_len (rsp, 0);
+ 	hdr    = gf_hdr_new (rsp, 0);
+ 	rsp    = gf_param (hdr);
+
+ 	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+ 	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret >= 0) {
+		state = CALL_STATE(frame);
+		if (state->cmd == ENTRYLK_UNLOCK)
+			gf_del_locker (conn->ltable,
+				       NULL, state->fd, frame->root->pid);
+		else
+			gf_add_locker (conn->ltable,
+				       NULL, state->fd, frame->root->pid);
+	} else if (op_errno != ENOSYS) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": FENTRYLK %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+ 	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_FENTRYLK,
+ 			       hdr, hdrlen, NULL, 0, NULL);
+
+ 	return 0;
+}
+
+
+/*
+ * server_access_cbk - access callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ *
+ * not for external reference
+ */
+int32_t
+server_access_cbk (call_frame_t *frame,
+                   void *cookie,
+                   xlator_t *this,
+                   int32_t op_ret,
+                   int32_t op_errno)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_access_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_ACCESS,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_utimens_cbk - utimens callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @stbuf:
+ *
+ * not for external reference
+ */
+int32_t
+server_utimens_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno,
+                    struct stat *stbuf)
+{
+	gf_hdr_common_t      *hdr = NULL;
+	gf_fop_utimens_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret == 0)
+		gf_stat_from_stat (&rsp->stat, stbuf);
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_UTIMENS,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_chmod_cbk - chmod callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @stbuf:
+ *
+ * not for external reference
+ */
+int32_t
+server_chmod_cbk (call_frame_t *frame,
+                  void *cookie,
+                  xlator_t *this,
+                  int32_t op_ret,
+                  int32_t op_errno,
+                  struct stat *stbuf)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_chmod_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret == 0)
+		gf_stat_from_stat (&rsp->stat, stbuf);
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_CHMOD,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_chown_cbk - chown callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @stbuf:
+ *
+ * not for external reference
+ */
+int32_t
+server_chown_cbk (call_frame_t *frame,
+                  void *cookie,
+                  xlator_t *this,
+                  int32_t op_ret,
+                  int32_t op_errno,
+                  struct stat *stbuf)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_chown_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	int32_t gf_errno = 0;
+	size_t  hdrlen = 0;
+
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret == 0)
+		gf_stat_from_stat (&rsp->stat, stbuf);
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_CHOWN,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_rmdir_cbk - rmdir callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ *
+ * not for external reference
+ */
+int32_t
+server_rmdir_cbk (call_frame_t *frame,
+                  void *cookie,
+                  xlator_t *this,
+                  int32_t op_ret,
+                  int32_t op_errno)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_rmdir_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	int32_t gf_errno = 0;
+	size_t  hdrlen = 0;
+
+	state = CALL_STATE(frame);
+
+	if (op_ret == 0) {
+		inode_unlink (state->loc.inode, state->loc.parent, 
+			      state->loc.name);
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": RMDIR %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0,
+			op_ret, strerror (op_errno));
+	}
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_RMDIR,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_mkdir_cbk - mkdir callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @stbuf:
+ *
+ * not for external reference
+ */
+int32_t
+server_mkdir_cbk (call_frame_t *frame,
+                  void *cookie,
+                  xlator_t *this,
+                  int32_t op_ret,
+                  int32_t op_errno,
+                  inode_t *inode,
+                  struct stat *stbuf)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_mkdir_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret >= 0) {
+		gf_stat_from_stat (&rsp->stat, stbuf);
+		inode_link (inode, state->loc.parent, state->loc.name, stbuf);
+		inode_lookup (inode);
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": MKDIR %s  ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			op_ret, strerror (op_errno));
+	}
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_MKDIR,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_mknod_cbk - mknod callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @stbuf:
+ *
+ * not for external reference
+ */
+int32_t
+server_mknod_cbk (call_frame_t *frame,
+                  void *cookie,
+                  xlator_t *this,
+                  int32_t op_ret,
+                  int32_t op_errno,
+                  inode_t *inode,
+                  struct stat *stbuf)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_mknod_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	int32_t gf_errno = 0;
+	size_t  hdrlen = 0;
+
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret >= 0) {
+		gf_stat_from_stat (&rsp->stat, stbuf);
+		inode_link (inode, state->loc.parent, state->loc.name, stbuf);
+		inode_lookup (inode);
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": MKNOD %s ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			op_ret, strerror (op_errno));
+	}
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_MKNOD,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_fsyncdir_cbk - fsyncdir callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ *
+ * not for external reference
+ */
+int32_t
+server_fsyncdir_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno)
+{
+	gf_hdr_common_t       *hdr = NULL;
+	gf_fop_fsyncdir_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	server_state_t *state = NULL;
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+	
+	if (op_ret < 0) {
+		state = CALL_STATE(frame);
+		
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": FSYNCDIR %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_FSYNCDIR,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_getdents_cbk - readdir callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ * @entries:
+ * @count:
+ *
+ * not for external reference
+ */
+int32_t
+server_getdents_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno,
+                     dir_entry_t *entries,
+                     int32_t count)
+{
+	gf_hdr_common_t       *hdr = NULL;
+	gf_fop_getdents_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t vec_count = 0;
+	int32_t gf_errno = 0;
+	int32_t ret = -1;
+	dict_t *reply_dict = NULL;
+	char   *buffer = NULL;
+	size_t  buflen = 0;
+	struct iovec vector[1];
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	if (op_ret >= 0) {
+		buflen = gf_direntry_to_bin (entries, &buffer);
+		if (buflen < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"fd - %"PRId64" (%"PRId64"): failed to convert "
+				"entries list to string buffer",
+				state->fd_no, state->fd->inode->ino);
+			op_ret = -1;
+			op_errno = EINVAL;
+			goto out;
+		}
+
+		reply_dict = dict_new ();
+		if (reply_dict == NULL) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"fd - %"PRId64" (%"PRId64"): failed to get new dict",
+				state->fd_no, state->fd->inode->ino);
+			op_ret = -1;
+			op_errno = ENOMEM;
+			goto out;
+		}
+		
+		ret = dict_set_dynptr (reply_dict, NULL, 
+				       buffer, buflen);
+		if (ret < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"fd - %"PRId64" (%"PRId64"): failed to set read buffer "
+				"to reply dictionary",
+				state->fd_no, state->fd->inode->ino);
+			op_ret = -1;
+			op_errno = -ret;
+			goto out;
+		}
+		frame->root->rsp_refs = reply_dict;
+		vector[0].iov_base = buffer;
+		vector[0].iov_len = buflen;
+		vec_count = 1;
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": GETDENTS %"PRId64" (%"PRId64"): %"PRId32" (%s)",
+			frame->root->unique,
+			state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, 
+			op_ret, strerror (op_errno));
+		vector[0].iov_base = NULL;
+		vector[0].iov_len = 0;
+	}
+
+out:
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	rsp->count = hton32 (count);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_GETDENTS,
+			       hdr, hdrlen, vector, vec_count, 
+			       frame->root->rsp_refs);
+	
+	if (reply_dict)
+		dict_unref (reply_dict);
+
+	return 0;
+}
+
+
+/*
+ * server_readdir_cbk - getdents callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ *
+ * not for external reference
+ */
+int32_t
+server_readdir_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno,
+                    gf_dirent_t *entries)
+{
+	gf_hdr_common_t      *hdr = NULL;
+	gf_fop_readdir_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	size_t  buf_size = 0;
+	int32_t gf_errno = 0;
+	server_state_t *state = NULL;
+
+	if (op_ret > 0)
+		buf_size = gf_dirent_serialize (entries, NULL, 0);
+
+	hdrlen = gf_hdr_len (rsp, buf_size);
+	hdr    = gf_hdr_new (rsp, buf_size);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret > 0) {
+		rsp->size = hton32 (buf_size);
+		gf_dirent_serialize (entries, rsp->buf, buf_size);
+	} else {
+		state = CALL_STATE(frame);
+
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": READDIR %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_READDIR,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_releasedir_cbk - releasedir callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ *
+ * not for external reference
+ */
+int32_t
+server_releasedir_cbk (call_frame_t *frame,
+		       void *cookie,
+		       xlator_t *this,
+		       int32_t op_ret,
+		       int32_t op_errno)
+{
+	gf_hdr_common_t         *hdr = NULL;
+	gf_cbk_releasedir_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	protocol_server_reply (frame, GF_OP_TYPE_CBK_REPLY, GF_CBK_RELEASEDIR,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_opendir_cbk - opendir callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ * @fd: file descriptor structure of opened directory
+ *
+ * not for external reference
+ */
+int32_t
+server_opendir_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno,
+                    fd_t *fd)
+{
+	server_connection_t *conn = NULL;
+	gf_hdr_common_t      *hdr = NULL;
+	gf_fop_opendir_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t   hdrlen = 0;
+	int32_t  gf_errno = 0;
+
+	conn = SERVER_CONNECTION(frame);
+
+	state = CALL_STATE(frame);
+
+	if (op_ret >= 0) {
+		fd_bind (fd);
+
+		state->fd_no = gf_fd_unused_get (conn->fdtable, fd);
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": OPENDIR %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0,
+			op_ret, strerror (op_errno));
+
+		/* NOTE: corresponding to fd_create()'s ref */
+		if (state->fd)
+			fd_unref (state->fd);
+	}
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+	rsp->fd           = hton64 (state->fd_no);
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_OPENDIR,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_statfs_cbk - statfs callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ * @buf:
+ *
+ * not for external reference
+ */
+int32_t
+server_statfs_cbk (call_frame_t *frame,
+                   void *cookie,
+                   xlator_t *this,
+                   int32_t op_ret,
+                   int32_t op_errno,
+                   struct statvfs *buf)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_statfs_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret >= 0) {
+		gf_statfs_from_statfs (&rsp->statfs, buf);
+	}
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_STATFS,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_removexattr_cbk - removexattr callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ *
+ * not for external reference
+ */
+int32_t
+server_removexattr_cbk (call_frame_t *frame,
+                        void *cookie,
+                        xlator_t *this,
+                        int32_t op_ret,
+                        int32_t op_errno)
+{
+	gf_hdr_common_t          *hdr = NULL;
+	gf_fop_removexattr_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_REMOVEXATTR,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_getxattr_cbk - getxattr callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ * @value:
+ *
+ * not for external reference
+ */
+int32_t
+server_getxattr_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno,
+                     dict_t *dict)
+{
+	gf_hdr_common_t       *hdr = NULL;
+	gf_fop_getxattr_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t len = 0;
+	int32_t gf_errno = 0;
+	int32_t ret = -1;
+
+	state = CALL_STATE(frame);
+
+	if (op_ret >= 0) {
+		len = dict_serialized_length (dict);
+		if (len < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"%s (%"PRId64"): failed to get serialized length of "
+				"reply dict",
+				state->loc.path, state->ino);
+			op_ret   = -1;
+			op_errno = EINVAL;
+			len = 0;
+		}
+	}
+
+	hdrlen = gf_hdr_len (rsp, len + 1);
+	hdr    = gf_hdr_new (rsp, len + 1);
+	rsp    = gf_param (hdr);
+
+	if (op_ret >= 0) {
+		ret = dict_serialize (dict, rsp->dict);
+		if (len < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"%s (%"PRId64"): failed to serialize reply dict",
+				state->loc.path, state->ino);
+			op_ret = -1;
+			op_errno = -ret;
+		}
+	}
+	rsp->dict_len = hton32 (len);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_GETXATTR,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_setxattr_cbk - setxattr callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ *
+ * not for external reference
+ */
+int32_t
+server_setxattr_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno)
+{
+	gf_hdr_common_t       *hdr = NULL;
+	gf_fop_setxattr_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_SETXATTR,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_rename_cbk - rename callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ *
+ * not for external reference
+ */
+int32_t
+server_rename_cbk (call_frame_t *frame,
+                   void *cookie,
+                   xlator_t *this,
+                   int32_t op_ret,
+                   int32_t op_errno,
+                   struct stat *stbuf)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_rename_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret == 0) {
+		stbuf->st_ino  = state->loc.inode->ino;
+		stbuf->st_mode = state->loc.inode->st_mode;
+
+		gf_log (state->bound_xl->name, GF_LOG_DEBUG,
+			"%"PRId64": RENAME_CBK (%"PRId64") %"PRId64"/%s "
+			"==> %"PRId64"/%s",
+			frame->root->unique, state->loc.inode->ino, 
+			state->loc.parent->ino,	state->loc.name,
+			state->loc2.parent->ino, state->loc2.name);
+			
+		inode_rename (state->itable,
+			      state->loc.parent, state->loc.name,
+			      state->loc2.parent, state->loc2.name,
+			      state->loc.inode, stbuf);
+		gf_stat_from_stat (&rsp->stat, stbuf);
+	}
+
+	server_loc_wipe (&(state->loc));
+	server_loc_wipe (&(state->loc2));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_RENAME,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_unlink_cbk - unlink callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ *
+ * not for external reference
+ */
+int32_t
+server_unlink_cbk (call_frame_t *frame,
+                   void *cookie,
+                   xlator_t *this,
+                   int32_t op_ret,
+                   int32_t op_errno)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_unlink_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	state = CALL_STATE(frame);
+
+	if (op_ret == 0) {
+		gf_log (state->bound_xl->name, GF_LOG_DEBUG,
+			"%"PRId64": UNLINK_CBK %"PRId64"/%s (%"PRId64")",
+			frame->root->unique, state->loc.parent->ino, 
+			state->loc.name, state->loc.inode->ino);
+
+		inode_unlink (state->loc.inode, state->loc.parent, 
+			      state->loc.name);
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": UNLINK %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0,
+			op_ret, strerror (op_errno));
+	}
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_UNLINK,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_symlink_cbk - symlink callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ *
+ * not for external reference
+ */
+int32_t
+server_symlink_cbk (call_frame_t *frame,
+                    void *cookie,
+                    xlator_t *this,
+                    int32_t op_ret,
+                    int32_t op_errno,
+                    inode_t *inode,
+                    struct stat *stbuf)
+{
+	gf_hdr_common_t      *hdr = NULL;
+	gf_fop_symlink_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno_to_error (op_errno));
+
+	if (op_ret >= 0) {
+		gf_stat_from_stat (&rsp->stat, stbuf);
+		inode_link (inode, state->loc.parent, state->loc.name, stbuf);
+		inode_lookup (inode);
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": SYMLINK %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0,
+			op_ret, strerror (op_errno));
+	}
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_SYMLINK,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_link_cbk - link callback for server protocol
+ * @frame: call frame
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @stbuf:
+ *
+ * not for external reference
+ */
+int32_t
+server_link_cbk (call_frame_t *frame,
+                 void *cookie,
+                 xlator_t *this,
+                 int32_t op_ret,
+                 int32_t op_errno,
+                 inode_t *inode,
+                 struct stat *stbuf)
+{
+	gf_hdr_common_t   *hdr = NULL;
+	gf_fop_link_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	int32_t gf_errno = 0;
+	size_t  hdrlen = 0;
+
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret == 0) {
+		stbuf->st_ino = state->loc.inode->ino;
+		gf_stat_from_stat (&rsp->stat, stbuf);
+		gf_log (state->bound_xl->name, GF_LOG_DEBUG,
+			"%"PRId64": LINK (%"PRId64") %"PRId64"/%s ==> %"PRId64"/%s",
+			frame->root->unique, inode->ino, state->loc2.parent->ino, 
+			state->loc2.name, state->loc.parent->ino, state->loc.name);
+
+		inode_link (inode, state->loc2.parent, 
+			    state->loc2.name, stbuf);
+	} else {
+		gf_log (state->bound_xl->name, GF_LOG_DEBUG,
+			"%"PRId64": LINK (%"PRId64") %"PRId64"/%s ==> %"PRId64"/%s "
+			" ==> %"PRId32" (%s)",
+			frame->root->unique, inode->ino, state->loc2.parent->ino, 
+			state->loc2.name, state->loc.parent->ino, state->loc.name,
+			op_ret, strerror (op_errno));
+	}
+
+	server_loc_wipe (&(state->loc));
+	server_loc_wipe (&(state->loc2));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_LINK,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_truncate_cbk - truncate callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @stbuf:
+ *
+ * not for external reference
+ */
+int32_t
+server_truncate_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno,
+                     struct stat *stbuf)
+{
+	gf_hdr_common_t       *hdr = NULL;
+	gf_fop_truncate_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	state = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret == 0) {
+		gf_stat_from_stat (&rsp->stat, stbuf);
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": TRUNCATE %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0,
+			op_ret, strerror (op_errno));
+	}
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_TRUNCATE,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_fstat_cbk - fstat callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @stbuf:
+ *
+ * not for external reference
+ */
+int32_t
+server_fstat_cbk (call_frame_t *frame,
+                  void *cookie,
+                  xlator_t *this,
+                  int32_t op_ret,
+                  int32_t op_errno,
+                  struct stat *stbuf)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_fstat_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	server_state_t *state = NULL;
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret == 0) {
+		gf_stat_from_stat (&rsp->stat, stbuf);
+	} else {
+		state = CALL_STATE(frame);
+		
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": FSTAT %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_FSTAT,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_ftruncate_cbk - ftruncate callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @stbuf:
+ *
+ * not for external reference
+ */
+int32_t
+server_ftruncate_cbk (call_frame_t *frame,
+                      void *cookie,
+                      xlator_t *this,
+                      int32_t op_ret,
+                      int32_t op_errno,
+                      struct stat *stbuf)
+{
+	gf_hdr_common_t        *hdr = NULL;
+	gf_fop_ftruncate_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	server_state_t *state = NULL;
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret == 0) {
+		gf_stat_from_stat (&rsp->stat, stbuf);
+	} else {
+		state = CALL_STATE(frame);
+
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": FTRUNCATE %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_FTRUNCATE,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_flush_cbk - flush callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ *
+ * not for external reference
+ */
+int32_t
+server_flush_cbk (call_frame_t *frame,
+                  void *cookie,
+                  xlator_t *this,
+                  int32_t op_ret,
+                  int32_t op_errno)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_flush_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	server_state_t *state = NULL;
+
+	if (op_ret < 0) {
+		state = CALL_STATE(frame);
+
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": FLUSH %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+	
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_FLUSH,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_fsync_cbk - fsync callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ *
+ * not for external reference
+ */
+int32_t
+server_fsync_cbk (call_frame_t *frame,
+                  void *cookie,
+                  xlator_t *this,
+                  int32_t op_ret,
+                  int32_t op_errno)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_fsync_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	server_state_t *state = NULL;
+
+	if (op_ret < 0) {
+		state = CALL_STATE(frame);
+
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": FSYNC %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_FSYNC,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_release_cbk - rleease callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ *
+ * not for external reference
+ */
+int32_t
+server_release_cbk (call_frame_t *frame,
+		    void *cookie,
+		    xlator_t *this,
+		    int32_t op_ret,
+		    int32_t op_errno)
+{
+	gf_hdr_common_t      *hdr = NULL;
+	gf_cbk_release_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	protocol_server_reply (frame, GF_OP_TYPE_CBK_REPLY, GF_CBK_RELEASE,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_writev_cbk - writev callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ *
+ * not for external reference
+ */
+
+int32_t
+server_writev_cbk (call_frame_t *frame,
+                   void *cookie,
+                   xlator_t *this,
+                   int32_t op_ret,
+                   int32_t op_errno,
+                   struct stat *stbuf)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_write_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	server_state_t *state = NULL;
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno_to_error (op_errno));
+
+	if (op_ret >= 0) {
+		gf_stat_from_stat (&rsp->stat, stbuf);
+	} else {
+		state = CALL_STATE(frame);
+
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": WRITEV %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+	protocol_server_reply (frame,
+			       GF_OP_TYPE_FOP_REPLY, GF_FOP_WRITE,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_readv_cbk - readv callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @vector:
+ * @count:
+ *
+ * not for external reference
+ */
+int32_t
+server_readv_cbk (call_frame_t *frame,
+                  void *cookie,
+                  xlator_t *this,
+                  int32_t op_ret,
+                  int32_t op_errno,
+                  struct iovec *vector,
+                  int32_t count,
+                  struct stat *stbuf)
+{
+	gf_hdr_common_t   *hdr = NULL;
+	gf_fop_read_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	server_state_t *state = NULL;
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret >= 0) {
+		gf_stat_from_stat (&rsp->stat, stbuf);
+	} else {
+		state = CALL_STATE(frame);
+
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": READV %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_READ,
+			       hdr, hdrlen, vector, count, 
+			       frame->root->rsp_refs);
+
+	return 0;
+}
+
+
+/*
+ * server_open_cbk - open callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @fd:
+ *
+ * not for external reference
+ */
+int32_t
+server_open_cbk (call_frame_t *frame,
+                 void *cookie,
+                 xlator_t *this,
+                 int32_t op_ret,
+                 int32_t op_errno,
+                 fd_t *fd)
+{
+	server_connection_t *conn = NULL;
+	gf_hdr_common_t   *hdr = NULL;
+	gf_fop_open_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	conn = SERVER_CONNECTION(frame);
+
+	state = CALL_STATE(frame);
+
+	if (op_ret >= 0) {
+		fd_bind (fd);
+		
+		state->fd_no = gf_fd_unused_get (conn->fdtable, fd);
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": OPEN %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0,
+			op_ret, strerror (op_errno));
+
+		/* NOTE: corresponding to fd_create()'s ref */
+		if (state->fd)
+			fd_unref (state->fd);
+	}
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+	rsp->fd           = hton64 (state->fd_no);
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_OPEN,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_create_cbk - create callback for server
+ * @frame: call frame
+ * @cookie:
+ * @this:  translator structure
+ * @op_ret:
+ * @op_errno:
+ * @fd: file descriptor
+ * @inode: inode structure
+ * @stbuf: struct stat of created file
+ *
+ * not for external reference
+ */
+int32_t
+server_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 *stbuf)
+{
+	server_connection_t *conn = NULL;
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_create_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	state = CALL_STATE(frame);
+
+	if (op_ret >= 0) {
+		gf_log (state->bound_xl->name, GF_LOG_DEBUG,
+			"%"PRId64": CREATE %"PRId64"/%s (%"PRId64")",
+			frame->root->unique, state->loc.parent->ino, 
+			state->loc.name, stbuf->st_ino);
+
+		inode_link (inode, state->loc.parent, state->loc.name, stbuf);
+		inode_lookup (inode);
+		
+		fd_bind (fd);
+
+		state->fd_no = gf_fd_unused_get (conn->fdtable, fd);
+
+		if ((state->fd_no < 0) || (fd == 0)) {
+			op_ret = state->fd_no;
+			op_errno = errno;
+		}
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": CREATE %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0,
+			op_ret, strerror (op_errno));
+		
+                /* NOTE: corresponding to fd_create()'s ref */
+		if (state->fd)
+			fd_unref (state->fd);
+
+	}
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+	rsp->fd           = hton64 (state->fd_no);
+
+	if (op_ret >= 0)
+		gf_stat_from_stat (&rsp->stat, stbuf);
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_CREATE,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_readlink_cbk - readlink callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @buf:
+ *
+ * not for external reference
+ */
+int32_t
+server_readlink_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno,
+                     const char *buf)
+{
+	gf_hdr_common_t       *hdr = NULL;
+	gf_fop_readlink_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	size_t  linklen = 0;
+	int32_t gf_errno = 0;
+
+	state  = CALL_STATE(frame);
+
+	if (op_ret >= 0) {
+		linklen = strlen (buf) + 1;
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": READLINK %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0,
+			op_ret, strerror (op_errno));
+	}
+
+	hdrlen = gf_hdr_len (rsp, linklen);
+	hdr    = gf_hdr_new (rsp, linklen);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno_to_error (op_errno));
+
+	if (op_ret >= 0)
+		strcpy (rsp->path, buf);
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_READLINK,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_stat_cbk - stat callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @stbuf:
+ *
+ * not for external reference
+ */
+int32_t
+server_stat_cbk (call_frame_t *frame,
+                 void *cookie,
+                 xlator_t *this,
+                 int32_t op_ret,
+                 int32_t op_errno,
+                 struct stat *stbuf)
+{
+	gf_hdr_common_t   *hdr = NULL;
+	gf_fop_stat_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	state  = CALL_STATE(frame);
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno_to_error (op_errno));
+
+	if (op_ret == 0) {
+		gf_stat_from_stat (&rsp->stat, stbuf);
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": STAT %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0,
+			op_ret, strerror (op_errno));
+	}
+
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_STAT,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_forget_cbk - forget callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ *
+ * not for external reference
+ */
+int32_t
+server_forget_cbk (call_frame_t *frame,
+                   void *cookie,
+                   xlator_t *this,
+                   int32_t op_ret,
+                   int32_t op_errno)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_cbk_forget_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	protocol_server_reply (frame, GF_OP_TYPE_CBK_REPLY, GF_CBK_FORGET,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_lookup_cbk - lookup callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret:
+ * @op_errno:
+ * @inode:
+ * @stbuf:
+ *
+ * not for external reference
+ */
+int32_t
+server_lookup_cbk (call_frame_t *frame,
+                   void *cookie,
+                   xlator_t *this,
+                   int32_t op_ret,
+                   int32_t op_errno,
+                   inode_t *inode,
+                   struct stat *stbuf,
+                   dict_t *dict)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_lookup_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	inode_t *root_inode = NULL;
+	int32_t  dict_len = 0;
+	size_t   hdrlen = 0;
+	int32_t  gf_errno = 0;
+	int32_t  ret = -1;
+
+	state = CALL_STATE(frame);
+	if ((op_errno == ESTALE) && (op_ret == -1)) {
+		/* Send lookup again with new ctx dictionary */
+		loc_t loc = {0,};
+
+		root_inode = BOUND_XL(frame)->itable->root;
+		if (state->loc.inode != root_inode) {
+			if (state->loc.inode)
+				inode_unref (state->loc.inode);
+			state->loc.inode = inode_new (BOUND_XL(frame)->itable);
+		}
+		loc.inode = state->loc.inode;
+		loc.path = state->path;
+		state->is_revalidate = 2;
+		STACK_WIND (frame, server_lookup_cbk,
+			    BOUND_XL(frame),
+			    BOUND_XL(frame)->fops->lookup,
+			    &loc,
+			    state->xattr_req);
+		return 0;
+	}
+
+	if (dict) {
+		dict_len = dict_serialized_length (dict);
+		if (dict_len < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"%s (%"PRId64"): failed to get serialized "
+				"length of reply dict",
+				state->loc.path, state->loc.inode->ino);
+			op_ret   = -1;
+			op_errno = EINVAL;
+			dict_len = 0;
+		}
+	}
+
+	hdrlen = gf_hdr_len (rsp, dict_len);
+	hdr    = gf_hdr_new (rsp, dict_len);
+	rsp    = gf_param (hdr);
+
+	if ((op_ret >= 0) && dict) {
+		ret = dict_serialize (dict, rsp->dict);
+		if (ret < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"%s (%"PRId64"): failed to serialize reply dict",
+				state->loc.path, state->loc.inode->ino);
+			op_ret = -1;
+			op_errno = -ret;
+			dict_len = 0;
+		} 
+	}
+	rsp->dict_len = hton32 (dict_len);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret == 0) {
+		root_inode = BOUND_XL(frame)->itable->root;
+		if (inode == root_inode) {
+			/* we just looked up root ("/") */
+			stbuf->st_ino = 1;
+			if (inode->st_mode == 0)
+				inode->st_mode = stbuf->st_mode;
+		}
+
+		gf_stat_from_stat (&rsp->stat, stbuf);
+
+		if (inode->ino == 0) {
+			inode_link (inode, state->loc.parent, 
+				    state->loc.name, stbuf);
+			inode_lookup (inode);
+		}
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": LOOKUP %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0,
+			op_ret, strerror (op_errno));
+	}
+
+	server_loc_wipe (&state->loc);
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_LOOKUP,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+int32_t
+server_xattrop_cbk (call_frame_t *frame,
+		    void *cookie,
+		    xlator_t *this,
+		    int32_t op_ret,
+		    int32_t op_errno,
+		    dict_t *dict)
+{
+	gf_hdr_common_t      *hdr = NULL;
+	gf_fop_xattrop_rsp_t *rsp = NULL;
+	server_state_t *state = NULL;
+	size_t  hdrlen = 0;
+	int32_t len = 0;
+	int32_t gf_errno = 0;
+	int32_t ret = -1;
+
+	state = CALL_STATE(frame);
+	
+	if (op_ret < 0) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": XATTROP %s (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->loc.path, 
+			state->loc.inode ? state->loc.inode->ino : 0,
+			op_ret, strerror (op_errno));
+	}
+
+	if ((op_ret >= 0) && dict) {
+		len = dict_serialized_length (dict);
+		if (len < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"%s (%"PRId64"): failed to get serialized length"
+				" for reply dict", 
+				state->loc.path, state->loc.inode->ino);
+			op_ret = -1;
+			op_errno = EINVAL;
+			len = 0;
+		}
+	} 
+
+	hdrlen = gf_hdr_len (rsp, len + 1);
+	hdr    = gf_hdr_new (rsp, len + 1);
+	rsp    = gf_param (hdr);
+
+	if ((op_ret >= 0) && dict) {
+		ret = dict_serialize (dict, rsp->dict);
+		if (ret < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"%s (%"PRId64"): failed to serialize reply dict", 
+				state->loc.path, state->loc.inode->ino);
+			op_ret = -1;
+			op_errno = -ret;
+			len = 0;
+		}
+	}
+	rsp->dict_len = hton32 (len);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+	
+	server_loc_wipe (&(state->loc));
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_XATTROP,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+int32_t
+server_fxattrop_cbk (call_frame_t *frame,
+		     void *cookie,
+		     xlator_t *this,
+		     int32_t op_ret,
+		     int32_t op_errno,
+		     dict_t *dict)
+{
+	gf_hdr_common_t      *hdr = NULL;
+	gf_fop_xattrop_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t len = 0;
+	int32_t gf_errno = 0;
+	int32_t ret = -1;
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+	
+	if (op_ret < 0) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"%"PRId64": FXATTROP %"PRId64" (%"PRId64") ==> %"PRId32" (%s)",
+			frame->root->unique, state->fd_no, 
+			state->fd ? state->fd->inode->ino : 0, op_ret,
+			strerror (op_errno));
+	}
+
+	if ((op_ret >= 0) && dict) {
+		len = dict_serialized_length (dict);
+		if (len < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"fd - %"PRId64" (%"PRId64"): failed to get "
+				"serialized length for reply dict", 
+				state->fd_no, state->fd->inode->ino);
+			op_ret = -1;
+			op_errno = EINVAL;
+			len = 0;				
+		}
+	}
+
+	hdrlen = gf_hdr_len (rsp, len + 1);
+	hdr    = gf_hdr_new (rsp, len + 1);
+	rsp    = gf_param (hdr);
+
+	if ((op_ret >= 0) && dict) {
+		ret = dict_serialize (dict, rsp->dict);
+		if (ret < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"fd - %"PRId64" (%"PRId64"): failed to "
+				"serialize reply dict", 
+				state->fd_no, state->fd->inode->ino);
+			op_ret = -1;
+			op_errno = -ret;
+			len = 0;
+		}
+	}
+	rsp->dict_len = hton32 (len);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_FXATTROP,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * server_stub_resume - this is callback function used whenever an fop does
+ *                   STACK_WIND to fops->lookup in order to lookup the inode
+ *                   for a pathname. this case of doing fops->lookup arises
+ *                   when fop searches in inode table for pathname and search
+ *                   fails.
+ *
+ * @stub: call stub
+ * @op_ret:
+ * @op_errno:
+ * @inode:
+ * @parent:
+ *
+ * not for external reference
+ */
+int32_t
+server_stub_resume (call_stub_t *stub,
+		    int32_t op_ret,
+		    int32_t op_errno,
+		    inode_t *inode,
+		    inode_t *parent)
+{
+	inode_t *server_inode = inode;
+
+	if (!stub) {
+		return 0;
+	}
+	switch (stub->fop)
+	{
+	case GF_FOP_RENAME:
+		if (stub->args.rename.old.inode == NULL) {
+			loc_t *newloc = NULL;
+			/* now we are called by lookup of oldpath. */
+			if (op_ret < 0) {
+				gf_log (stub->frame->this->name, GF_LOG_ERROR,
+					"%"PRId64": RENAME (%s -> %s) on %s "
+					"returning error: "
+					"%"PRId32" (%"PRId32")",
+					stub->frame->root->unique,
+					stub->args.rename.old.path,
+					stub->args.rename.new.path,
+					BOUND_XL(stub->frame)->name,
+					op_ret, op_errno);
+				
+				/* lookup of oldpath failed, UNWIND to
+				 * server_rename_cbk with ret=-1 and 
+				 * errno=ENOENT 
+				 */
+				server_rename_cbk (stub->frame,
+						   NULL,
+						   stub->frame->this,
+						   -1,
+						   ENOENT,
+						   NULL);
+				server_loc_wipe (&stub->args.rename.old);
+				server_loc_wipe (&stub->args.rename.new);
+				FREE (stub);
+				return 0;
+			}
+			
+			if (stub->args.rename.old.parent == NULL)
+				stub->args.rename.old.parent = 
+					inode_ref (parent);
+			
+			/* store inode information of oldpath in our stub 
+			 * and search for newpath in inode table. 
+			 */
+			if (server_inode) {
+				stub->args.rename.old.inode = 
+					inode_ref (server_inode);
+				
+				stub->args.rename.old.ino =
+					server_inode->ino;
+			}
+
+			/* now lookup for newpath */
+			newloc = &stub->args.rename.new;
+
+			if (newloc->parent == NULL) {
+				/* lookup for newpath */
+				do_path_lookup (stub, newloc);
+				break;
+			} else {
+				/* found newpath in inode cache */
+				call_resume (stub);
+				break;
+			}
+		} else {
+			/* we are called by the lookup of newpath */
+			if (stub->args.rename.new.parent == NULL)
+				stub->args.rename.new.parent = 
+					inode_ref (parent);
+		}
+		
+		/* after looking up for oldpath as well as newpath,
+		 * we are ready to resume */
+		{
+			call_resume (stub);
+		}
+		break;
+		
+	case GF_FOP_OPEN:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": OPEN (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.open.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+			
+			server_open_cbk (stub->frame,
+					 NULL,
+					 stub->frame->this,
+					 -1,
+					 ENOENT,
+					 NULL);
+			FREE (stub->args.open.loc.path);
+			FREE (stub);
+			return 0;
+		}
+		if (stub->args.open.loc.parent == NULL)
+			stub->args.open.loc.parent = inode_ref (parent);
+		
+		if (server_inode && (stub->args.open.loc.inode == NULL)) {
+			stub->args.open.loc.inode = inode_ref (server_inode);
+			stub->args.open.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+	
+	case GF_FOP_LOOKUP:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name,
+				GF_LOG_DEBUG,
+				"%"PRId64": LOOKUP (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.lookup.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+			
+			server_lookup_cbk (stub->frame,
+					   NULL,
+					   stub->frame->this,
+					   -1, ENOENT,
+					   NULL, NULL,
+					   NULL);
+			server_loc_wipe (&stub->args.lookup.loc);
+			FREE (stub);
+			return 0;
+		}
+		
+		if (stub->args.lookup.loc.parent == NULL)
+			stub->args.lookup.loc.parent = inode_ref (parent);
+		
+		if (server_inode && (stub->args.lookup.loc.inode == NULL)) {
+			stub->args.lookup.loc.inode = inode_ref (server_inode);
+			stub->args.lookup.loc.ino = server_inode->ino;
+		}
+		
+		call_resume (stub);
+		
+		break;
+	}
+	
+	case GF_FOP_STAT:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": STAT (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.stat.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+			server_stat_cbk (stub->frame,
+					 NULL,
+					 stub->frame->this,
+					 -1, ENOENT,
+					 NULL);
+			server_loc_wipe (&stub->args.stat.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		/* TODO:reply from here only, we already have stat structure */
+		if (stub->args.stat.loc.parent == NULL)
+			stub->args.stat.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.stat.loc.inode == NULL)) {
+			stub->args.stat.loc.inode = inode_ref (server_inode);
+			stub->args.stat.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_XATTROP:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": XATTROP (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.xattrop.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+			server_xattrop_cbk (stub->frame,
+					    NULL,
+					    stub->frame->this,
+					    -1, ENOENT,
+					    NULL);
+			server_loc_wipe (&stub->args.xattrop.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.xattrop.loc.parent == NULL)
+			stub->args.xattrop.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.xattrop.loc.inode == NULL)) {
+			stub->args.xattrop.loc.inode = 
+				inode_ref (server_inode);
+
+			stub->args.xattrop.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_UNLINK:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": UNLINK (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.unlink.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+			server_unlink_cbk (stub->frame, NULL,
+					   stub->frame->this, 
+					   -1, ENOENT);
+			server_loc_wipe (&stub->args.unlink.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.unlink.loc.parent == NULL)
+			stub->args.unlink.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.unlink.loc.inode == NULL)) {
+			stub->args.unlink.loc.inode = inode_ref (server_inode);
+			stub->args.unlink.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_SYMLINK:
+	{
+		if ((op_ret < 0) && (parent == NULL)) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": SYMLINK (%s -> %s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.symlink.loc.path,
+				stub->args.symlink.linkname,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+			server_symlink_cbk (stub->frame, NULL,
+					    stub->frame->this, 
+					    -1, ENOENT,
+					    NULL, NULL);
+			server_loc_wipe (&stub->args.symlink.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.symlink.loc.parent == NULL)
+			stub->args.symlink.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.symlink.loc.inode == NULL)) {
+			stub->args.symlink.loc.inode = 
+				inode_ref (server_inode);
+			stub->args.symlink.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_RMDIR:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": RMDIR (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.rmdir.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+			server_rmdir_cbk (stub->frame,
+					  NULL,
+					  stub->frame->this,
+					  -1,
+					  ENOENT);
+			server_loc_wipe (&stub->args.rmdir.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.rmdir.loc.parent == NULL)
+			stub->args.rmdir.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.rmdir.loc.inode == NULL)) {
+			stub->args.rmdir.loc.inode = inode_ref (server_inode);
+			stub->args.rmdir.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_CHMOD:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": CHMOD (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.chmod.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+			server_chmod_cbk (stub->frame,
+					  NULL,
+					  stub->frame->this,
+					  -1,
+					  ENOENT,
+					  NULL);
+			server_loc_wipe (&stub->args.chmod.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.chmod.loc.parent == NULL)
+			stub->args.chmod.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.chmod.loc.inode == NULL)) {
+			stub->args.chmod.loc.inode = inode_ref (server_inode);
+			stub->args.chmod.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_CHOWN:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": CHOWN (%s) on %s returning ENOENT: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.chown.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+			server_chown_cbk (stub->frame,
+					  NULL,
+					  stub->frame->this,
+					  -1,
+					  ENOENT,
+					  NULL);
+			server_loc_wipe (&stub->args.chown.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.chown.loc.parent == NULL)
+			stub->args.chown.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.chown.loc.inode == NULL)) {
+			stub->args.chown.loc.inode = inode_ref (server_inode);
+			stub->args.chown.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_LINK:
+	{
+		if (stub->args.link.oldloc.inode == NULL) {
+			if (op_ret < 0) {
+				gf_log (stub->frame->this->name, GF_LOG_ERROR,
+					"%"PRId64": LINK (%s -> %s) on %s returning "
+					"error for oldloc: "
+					"%"PRId32" (%"PRId32")",
+					stub->frame->root->unique,
+					stub->args.link.oldloc.path,
+					stub->args.link.newloc.path,
+					BOUND_XL(stub->frame)->name,
+					op_ret, op_errno);
+
+				server_link_cbk (stub->frame,
+						 NULL,
+						 stub->frame->this,
+						 -1, ENOENT,
+						 NULL, NULL);
+				server_loc_wipe (&stub->args.link.oldloc);
+				server_loc_wipe (&stub->args.link.newloc);
+				FREE (stub);
+				return 0;
+			}
+
+			if (stub->args.link.oldloc.parent == NULL)
+				stub->args.link.oldloc.parent = 
+					inode_ref (parent);
+
+			if (server_inode && 
+			    (stub->args.link.oldloc.inode == NULL)) {
+				stub->args.link.oldloc.inode = 
+					inode_ref (server_inode);
+				stub->args.link.oldloc.ino = server_inode->ino;
+			}
+
+			if (stub->args.link.newloc.parent == NULL) {
+				do_path_lookup (stub, 
+						&(stub->args.link.newloc));
+				break;
+			}
+		} else {
+			/* we are called by the lookup of newpath */
+			if ((op_ret < 0) && (parent == NULL)) {
+				gf_log (stub->frame->this->name, GF_LOG_ERROR,
+					"%"PRId64": LINK (%s -> %s) on %s returning "
+					"error for newloc: "
+					"%"PRId32" (%"PRId32")",
+					stub->frame->root->unique,
+					stub->args.link.oldloc.path,
+					stub->args.link.newloc.path,
+					BOUND_XL(stub->frame)->name,
+					op_ret, op_errno);
+
+				server_link_cbk (stub->frame, NULL,
+						 stub->frame->this, 
+						 -1, ENOENT, 
+						 NULL, NULL);
+
+				server_loc_wipe (&stub->args.link.oldloc);
+				server_loc_wipe (&stub->args.link.newloc);
+				FREE (stub);
+				break;
+			}
+
+			if (stub->args.link.newloc.parent == NULL) {
+				stub->args.link.newloc.parent = 
+					inode_ref (parent);
+			}
+
+			if (server_inode && 
+			    (stub->args.link.newloc.inode == NULL)) {
+				/* as new.inode doesn't get forget, it
+				 * needs to be unref'd here */
+				stub->args.link.newloc.inode = 
+					inode_ref (server_inode);
+				stub->args.link.newloc.ino = server_inode->ino;
+			}
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_TRUNCATE:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": TRUNCATE (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.truncate.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+
+			server_truncate_cbk (stub->frame,
+					     NULL,
+					     stub->frame->this,
+					     -1, ENOENT,
+					     NULL);
+			server_loc_wipe (&stub->args.truncate.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.truncate.loc.parent == NULL)
+			stub->args.truncate.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.truncate.loc.inode == NULL)) {
+			stub->args.truncate.loc.inode = 
+				inode_ref (server_inode);
+			stub->args.truncate.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_STATFS:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": STATFS (%s) on %s returning ENOENT: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.statfs.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+
+			server_statfs_cbk (stub->frame,
+					   NULL,
+					   stub->frame->this,
+					   -1, ENOENT,
+					   NULL);
+			server_loc_wipe (&stub->args.statfs.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.statfs.loc.parent == NULL)
+			stub->args.statfs.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.statfs.loc.inode == NULL)) {
+			stub->args.statfs.loc.inode = inode_ref (server_inode);
+			stub->args.statfs.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_SETXATTR:
+	{
+		dict_t *dict = stub->args.setxattr.dict;
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": SETXATTR (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.setxattr.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+
+			server_setxattr_cbk (stub->frame,
+					     NULL,
+					     stub->frame->this,
+					     -1, ENOENT);
+
+			server_loc_wipe (&stub->args.setxattr.loc);
+			dict_unref (dict);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.setxattr.loc.parent == NULL)
+			stub->args.setxattr.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.setxattr.loc.inode == NULL)) {
+			stub->args.setxattr.loc.inode = 
+				inode_ref (server_inode);
+			stub->args.setxattr.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_GETXATTR:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": GETXATTR (%s) on %s for key %s "
+				"returning error: %"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.getxattr.loc.path,
+				BOUND_XL(stub->frame)->name,
+				stub->args.getxattr.name ? 
+				stub->args.getxattr.name : "<nul>",
+				op_ret, op_errno);
+
+			server_getxattr_cbk (stub->frame,
+					     NULL,
+					     stub->frame->this,
+					     -1, ENOENT,
+					     NULL);
+			server_loc_wipe (&stub->args.getxattr.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.getxattr.loc.parent == NULL)
+			stub->args.getxattr.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.getxattr.loc.inode == NULL)) {
+			stub->args.getxattr.loc.inode = 
+				inode_ref (server_inode);
+			stub->args.getxattr.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_REMOVEXATTR:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": REMOVEXATTR (%s) on %s for key %s "
+				"returning error: %"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.removexattr.loc.path,
+				BOUND_XL(stub->frame)->name,
+				stub->args.removexattr.name,
+				op_ret, op_errno);
+
+			server_removexattr_cbk (stub->frame,
+						NULL,
+						stub->frame->this,
+						-1,
+						ENOENT);
+			server_loc_wipe (&stub->args.removexattr.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.removexattr.loc.parent == NULL)
+			stub->args.removexattr.loc.parent = inode_ref (parent);
+
+		if (server_inode && 
+		    (stub->args.removexattr.loc.inode == NULL)) {
+			stub->args.removexattr.loc.inode = 
+				inode_ref (server_inode);
+			stub->args.removexattr.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_OPENDIR:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": OPENDIR (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.opendir.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+
+			server_opendir_cbk (stub->frame,
+					    NULL,
+					    stub->frame->this,
+					    -1, ENOENT,
+					    NULL);
+			server_loc_wipe (&stub->args.opendir.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.opendir.loc.parent == NULL)
+			stub->args.opendir.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.opendir.loc.inode == NULL)) {
+			stub->args.opendir.loc.inode = 
+				inode_ref (server_inode);
+			stub->args.opendir.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_ACCESS:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": ACCESS (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.access.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+
+			server_access_cbk (stub->frame,
+					   NULL,
+					   stub->frame->this,
+					   -1, ENOENT);
+			server_loc_wipe (&stub->args.access.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.access.loc.parent == NULL)
+			stub->args.access.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.access.loc.inode == NULL)) {
+			stub->args.access.loc.inode = inode_ref (server_inode);
+			stub->args.access.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+
+	case GF_FOP_UTIMENS:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": UTIMENS (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.utimens.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+
+			server_utimens_cbk (stub->frame,
+					    NULL,
+					    stub->frame->this,
+					    -1, ENOENT,
+					    NULL);
+			server_loc_wipe (&stub->args.utimens.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.utimens.loc.parent == NULL)
+			stub->args.utimens.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.utimens.loc.inode == NULL)) {
+			stub->args.utimens.loc.inode = 
+				inode_ref (server_inode);
+			stub->args.utimens.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_READLINK:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": READLINK (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.readlink.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+
+			server_readlink_cbk (stub->frame,
+					     NULL,
+					     stub->frame->this,
+					     -1, ENOENT,
+					     NULL);
+			server_loc_wipe (&stub->args.readlink.loc);
+			FREE (stub);
+			return 0;
+		}
+
+		if (stub->args.readlink.loc.parent == NULL)
+			stub->args.readlink.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.readlink.loc.inode == NULL)) {
+			stub->args.readlink.loc.inode = 
+				inode_ref (server_inode);
+			stub->args.readlink.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+	case GF_FOP_MKDIR:
+	{
+		if ((op_ret < 0) && (parent == NULL)) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": MKDIR (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.mkdir.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+
+			server_mkdir_cbk (stub->frame,
+					  NULL,
+					  stub->frame->this,
+					  -1, ENOENT,
+					  NULL, NULL);
+			server_loc_wipe (&stub->args.mkdir.loc);
+			FREE (stub);
+			break;
+		}
+
+		if (stub->args.mkdir.loc.parent == NULL)
+			stub->args.mkdir.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.mkdir.loc.inode == NULL)) {
+			stub->args.mkdir.loc.inode = inode_ref (server_inode);
+			stub->args.mkdir.loc.ino = server_inode->ino;
+		}
+
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_CREATE:
+	{
+		if ((op_ret < 0) && (parent == NULL)) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": CREATE (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.create.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+
+			server_create_cbk (stub->frame,
+					   NULL,
+					   stub->frame->this,
+					   -1, ENOENT,
+					   NULL, NULL,
+					   NULL);
+			if (stub->args.create.fd)
+				fd_unref (stub->args.create.fd);
+			server_loc_wipe (&stub->args.create.loc);
+			FREE (stub);
+			break;
+		}
+
+		if (stub->args.create.loc.parent == NULL)
+			stub->args.create.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.create.loc.inode == NULL)) {
+			stub->args.create.loc.inode = inode_ref (server_inode);
+			stub->args.create.loc.ino = server_inode->ino;
+		}
+
+		call_resume (stub);
+		break;
+	}
+
+	case GF_FOP_MKNOD:
+	{
+		if ((op_ret < 0) && (parent == NULL)) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": MKNOD (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.mknod.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+
+			server_mknod_cbk (stub->frame,
+					  NULL,
+					  stub->frame->this,
+					  -1, ENOENT,
+					  NULL, NULL);
+			server_loc_wipe (&stub->args.mknod.loc);
+			FREE (stub);
+			break;
+		}
+
+		if (stub->args.mknod.loc.parent == NULL)
+			stub->args.mknod.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.mknod.loc.inode == NULL)) {
+			stub->args.mknod.loc.inode = inode_ref (server_inode);
+			stub->args.mknod.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+	case GF_FOP_ENTRYLK:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": ENTRYLK (%s) on %s for key %s returning "
+				"error: %"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.entrylk.loc.path,
+				BOUND_XL(stub->frame)->name,
+				stub->args.entrylk.name ?
+				stub->args.entrylk.name : "<nul>",
+				op_ret, op_errno);
+
+			server_entrylk_cbk (stub->frame,
+					    NULL,
+					    stub->frame->this,
+					    -1, ENOENT);
+			server_loc_wipe (&stub->args.entrylk.loc);
+			FREE (stub);
+			break;
+		}
+
+		if (stub->args.entrylk.loc.parent == NULL)
+			stub->args.entrylk.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.entrylk.loc.inode == NULL)) {
+			stub->args.entrylk.loc.inode = inode_ref (server_inode);
+			stub->args.entrylk.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+	case GF_FOP_INODELK:
+	{
+		if (op_ret < 0) {
+			gf_log (stub->frame->this->name, GF_LOG_ERROR,
+				"%"PRId64": INODELK (%s) on %s returning error: "
+				"%"PRId32" (%"PRId32")",
+				stub->frame->root->unique,
+				stub->args.inodelk.loc.path,
+				BOUND_XL(stub->frame)->name,
+				op_ret, op_errno);
+
+			server_inodelk_cbk (stub->frame,
+					    NULL,
+					    stub->frame->this,
+					    -1, ENOENT);
+			server_loc_wipe (&stub->args.inodelk.loc);
+			FREE (stub);
+			break;
+		}
+
+		if (stub->args.inodelk.loc.parent == NULL)
+			stub->args.inodelk.loc.parent = inode_ref (parent);
+
+		if (server_inode && (stub->args.inodelk.loc.inode == NULL)) {
+			stub->args.inodelk.loc.inode = 
+				inode_ref (server_inode);
+			stub->args.inodelk.loc.ino = server_inode->ino;
+		}
+		call_resume (stub);
+		break;
+	}
+	default:
+		call_resume (stub);
+	}
+
+	return 0;
+}
+
+static int
+server_lookup_resume (call_frame_t *frame,
+		      xlator_t *this,
+		      loc_t *loc,
+		      dict_t *xattr_req)
+{
+	server_state_t *state = NULL;
+
+	state = CALL_STATE(frame);
+
+	if ((state->loc.parent == NULL) && 
+	    (loc->parent))
+		state->loc.parent = inode_ref (loc->parent);
+
+	if (state->loc.inode == NULL) {
+		if (loc->inode == NULL)
+			state->loc.inode = inode_new (state->itable);
+		else
+			/* FIXME: why another lookup? */
+			state->loc.inode = inode_ref (loc->inode);
+	} else {
+		if (loc->inode && (state->loc.inode != loc->inode)) {
+			if (state->loc.inode)
+				inode_unref (state->loc.inode);
+			state->loc.inode = inode_ref (loc->inode);
+		}
+	}
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": LOOKUP \'%"PRId64"/%s\'", 
+		frame->root->unique, state->par, state->bname);
+
+	STACK_WIND (frame,
+		    server_lookup_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->lookup,
+		    &(state->loc),
+		    xattr_req);
+	return 0;
+}
+
+/*
+ * server_lookup - lookup function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int
+server_lookup (call_frame_t *frame,
+               xlator_t *bound_xl,
+               gf_hdr_common_t *hdr, size_t hdrlen,
+               char *buf, size_t buflen)
+{
+	gf_fop_lookup_req_t *req = NULL;
+	server_state_t      *state = NULL;
+	call_stub_t *lookup_stub = NULL;
+	int32_t      ret = -1;
+	size_t pathlen = 0, baselen = 0;
+	size_t dictlen = 0;
+	dict_t *xattr_req = NULL;
+	char   *req_dictbuf = NULL;
+
+	req = gf_param (hdr);
+
+	state = CALL_STATE(frame);
+	{
+
+		pathlen = STRLEN_0 (req->path);
+		dictlen = ntoh32 (req->dictlen);
+		
+		/* NOTE: lookup() uses req->ino only to identify if a lookup()
+		 *       is requested for 'root' or not 
+		 */
+		state->ino    = ntoh64 (req->ino);
+		if (state->ino != 1)
+			state->ino = 0;
+
+		state->par    = ntoh64 (req->par);
+		state->path   = req->path;
+		if (IS_NOT_ROOT(pathlen)) {
+			state->bname = req->bname + pathlen;
+			baselen = STRLEN_0 (state->bname);
+		}
+
+		if (dictlen) {
+			/* Unserialize the dictionary */
+			req_dictbuf = memdup (req->dict + pathlen + baselen, dictlen);
+			GF_VALIDATE_OR_GOTO(bound_xl->name, req_dictbuf, fail);
+			
+			xattr_req = dict_new ();
+			GF_VALIDATE_OR_GOTO(bound_xl->name, xattr_req, fail);
+
+			ret = dict_unserialize (req_dictbuf, dictlen, &xattr_req);
+			if (ret < 0) {
+				gf_log (bound_xl->name, GF_LOG_ERROR,
+					"%"PRId64": %s (%"PRId64"): failed to "
+					"unserialize request buffer to dictionary", 
+					frame->root->unique, state->loc.path, 
+					state->ino);
+				free (req_dictbuf);
+				goto fail;
+			} else{
+				xattr_req->extra_free = req_dictbuf;
+				state->xattr_req = xattr_req;
+				xattr_req = NULL;
+			}
+		}
+	}
+
+	ret = server_loc_fill (&state->loc, state,
+			       state->ino, state->par, state->bname,
+			       state->path);
+
+ 	if (state->loc.inode) {
+		/* revalidate */
+		state->is_revalidate = 1;
+	} else {
+		/* fresh lookup or inode was previously pruned out */
+		state->is_revalidate = -1;
+	}
+
+	lookup_stub = fop_lookup_stub (frame, server_lookup_resume,
+				       &(state->loc), state->xattr_req);
+	GF_VALIDATE_OR_GOTO(bound_xl->name, lookup_stub, fail);
+
+	if ((state->loc.parent == NULL) && 
+	    IS_NOT_ROOT(pathlen))
+		do_path_lookup (lookup_stub, &(state->loc));
+	else
+		call_resume (lookup_stub);
+	
+	return 0;
+fail:
+	server_lookup_cbk (frame, NULL, frame->this,
+			   -1,EINVAL,
+			   NULL, NULL, NULL);
+	if (xattr_req)
+		dict_unref (xattr_req);
+
+	return 0;
+}
+
+
+/*
+ * server_forget - forget function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_forget (call_frame_t *frame, xlator_t *bound_xl,
+               gf_hdr_common_t *hdr, size_t hdrlen,
+               char *buf, size_t buflen)
+{
+	int index = 0;
+	ino_t ino = 0;
+	int32_t count = 0;
+	inode_t *inode = NULL;
+	gf_cbk_forget_req_t *req = NULL;
+
+	req = gf_param (hdr);
+	count = ntoh32 (req->count);
+
+	for (index = 0; index < count; index++) {
+		
+		ino = ntoh64 (req->ino_array[index]);
+		
+		if (!ino)
+			continue;
+
+		inode = inode_search (bound_xl->itable, ino, NULL);
+
+		if (inode) {
+			inode_forget (inode, 0);
+			inode_unref (inode);
+		} else {
+			gf_log (bound_xl->name, GF_LOG_DEBUG,
+				"%"PRId64": FORGET %"PRId64" not found "
+				"in inode table",
+				frame->root->unique, ino);
+		}
+		
+		gf_log (bound_xl->name, GF_LOG_DEBUG,
+			"%"PRId64": FORGET \'%"PRId64"\'", 
+			frame->root->unique, ino);
+	}
+
+	server_forget_cbk (frame, NULL, bound_xl, 0, 0);
+
+	return 0;
+}
+
+
+
+int32_t
+server_stat_resume (call_frame_t *frame,
+                    xlator_t *this,
+                    loc_t *loc)
+{
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": STAT \'%s (%"PRId64")\'", 
+		frame->root->unique, state->loc.path, state->loc.ino);
+
+	STACK_WIND (frame,
+		    server_stat_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->stat,
+		    loc);
+	return 0;
+}
+
+/*
+ * server_stat - stat function for server
+ * @frame: call frame
+ * @bound_xl: translator this server is bound to
+ * @params: parameters dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_stat (call_frame_t *frame,
+             xlator_t *bound_xl,
+             gf_hdr_common_t *hdr, size_t hdrlen,
+             char *buf, size_t buflen)
+{
+	call_stub_t *stat_stub = NULL;
+	gf_fop_stat_req_t *req = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	size_t  pathlen = 0;
+
+	req = gf_param (hdr);
+	state = CALL_STATE(frame);
+
+	state->ino  = ntoh64 (req->ino);
+	state->path = req->path;
+	pathlen = STRLEN_0(state->path);
+
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, state->par, state->bname,
+			       state->path);
+
+	stat_stub = fop_stat_stub (frame,
+				   server_stat_resume,
+				   &(state->loc));
+	GF_VALIDATE_OR_GOTO(bound_xl->name, stat_stub, fail);
+
+	if (((state->loc.parent == NULL) && IS_NOT_ROOT(pathlen)) || 
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (stat_stub, &(state->loc));
+	} else {
+		call_resume (stat_stub);
+	}
+	return 0;
+fail:
+	server_stat_cbk (frame, NULL, frame->this,
+			 -1, EINVAL,
+			 NULL);
+	return 0;
+}
+
+
+int32_t
+server_readlink_resume (call_frame_t *frame,
+                        xlator_t *this,
+                        loc_t *loc,
+                        size_t size)
+{
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": READLINK \'%s (%"PRId64")\'", 
+		frame->root->unique, state->loc.path, state->loc.ino);
+
+	STACK_WIND (frame,
+		    server_readlink_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->readlink,
+		    loc,
+		    size);
+	return 0;
+}
+
+/*
+ * server_readlink - readlink function for server
+ * @frame: call frame
+ * @bound_xl: translator this server is bound to
+ * @params: parameters dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_readlink (call_frame_t *frame,
+                 xlator_t *bound_xl,
+                 gf_hdr_common_t *hdr, size_t hdrlen,
+                 char *buf, size_t buflen)
+{
+	call_stub_t *readlink_stub = NULL;
+	gf_fop_readlink_req_t *req = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+
+	state->size  = ntoh32 (req->size);
+
+	state->ino  = ntoh64 (req->ino);
+	state->path = req->path;
+
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, 0, NULL, state->path);
+
+	readlink_stub = fop_readlink_stub (frame,
+					   server_readlink_resume,
+					   &(state->loc),
+					   state->size);
+	GF_VALIDATE_OR_GOTO(bound_xl->name, readlink_stub, fail);
+
+	if ((state->loc.parent == NULL) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (readlink_stub, &(state->loc));
+	} else {
+		call_resume (readlink_stub);
+	}
+	return 0;
+fail:
+	server_readlink_cbk (frame, NULL,frame->this,
+			     -1, EINVAL,
+			     NULL);
+	return 0;
+}
+
+int32_t
+server_create_resume (call_frame_t *frame,
+		      xlator_t *this,
+		      loc_t *loc,
+		      int32_t flags,
+		      mode_t mode,
+		      fd_t *fd)
+{
+	server_state_t *state = CALL_STATE(frame);
+
+	if (state->loc.parent == NULL)
+		state->loc.parent = inode_ref (loc->parent);
+
+	state->loc.inode = inode_new (state->itable);
+	GF_VALIDATE_OR_GOTO(BOUND_XL(frame)->name, state->loc.inode, fail);
+
+	state->fd = fd_create (state->loc.inode, frame->root->pid);
+	GF_VALIDATE_OR_GOTO(BOUND_XL(frame)->name, state->fd, fail);
+
+	state->fd->flags = flags;
+	state->fd = fd_ref (state->fd);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": CREATE \'%"PRId64"/%s\'", 
+		frame->root->unique, state->par, state->bname);
+
+	STACK_WIND (frame,
+		    server_create_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->create,
+		    &(state->loc),
+		    flags,
+		    mode,
+		    state->fd);
+
+	return 0;
+fail:
+	server_create_cbk (frame, NULL, frame->this,
+			   -1, EINVAL,
+			   NULL, NULL, NULL);
+	return 0;
+}
+
+
+/*
+ * server_create - create function for server
+ * @frame: call frame
+ * @bound_xl: translator this server is bound to
+ * @params: parameters dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_create (call_frame_t *frame, xlator_t *bound_xl,
+               gf_hdr_common_t *hdr, size_t hdrlen,
+               char *buf, size_t buflen)
+{
+	gf_fop_create_req_t *req = NULL;
+	server_state_t      *state = NULL;
+	call_stub_t         *create_stub = NULL;
+	int32_t ret = -1;
+	size_t pathlen = 0;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		pathlen = STRLEN_0(req->path);
+		
+		state->par  = ntoh64 (req->par);
+		state->path = req->path;
+		if (IS_NOT_ROOT(pathlen))
+			state->bname = req->bname + pathlen;
+
+		state->mode  = ntoh32 (req->mode);
+		state->flags = ntoh32 (req->flags);
+	}
+
+	ret = server_loc_fill (&(state->loc), state,
+			       0, state->par, state->bname,
+			       state->path);
+
+	create_stub = fop_create_stub (frame, server_create_resume,
+				       &(state->loc), state->flags, 
+				       state->mode, state->fd);
+	GF_VALIDATE_OR_GOTO(bound_xl->name, create_stub, fail);
+
+	if (state->loc.parent == NULL) {
+		do_path_lookup (create_stub, &state->loc);
+	} else {
+		call_resume (create_stub);
+	}
+	return 0;
+fail:
+	server_create_cbk (frame, NULL, frame->this,
+			   -1, EINVAL,
+			   NULL, NULL, NULL);
+	return 0;
+}
+
+
+int32_t
+server_open_resume (call_frame_t *frame,
+                    xlator_t *this,
+                    loc_t *loc,
+                    int32_t flags,
+                    fd_t *fd)
+{
+	server_state_t *state = CALL_STATE(frame);
+	fd_t *new_fd = NULL;
+
+	new_fd = fd_create (loc->inode, frame->root->pid);
+	GF_VALIDATE_OR_GOTO(BOUND_XL(frame)->name, new_fd, fail);
+
+	new_fd->flags = flags;
+
+	state->fd = fd_ref (new_fd);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": OPEN \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+	STACK_WIND (frame,
+		    server_open_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->open,
+		    loc,
+		    flags,
+		    state->fd);
+
+	return 0;
+fail:
+	server_open_cbk (frame, NULL, frame->this,
+			 -1, EINVAL,
+			 NULL);
+	return 0;
+}
+
+/*
+ * server_open - open function for server protocol
+ * @frame: call frame
+ * @bound_xl: translator this server protocol is bound to
+ * @params: parameters dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_open (call_frame_t *frame, xlator_t *bound_xl,
+             gf_hdr_common_t *hdr, size_t hdrlen,
+             char *buf, size_t buflen)
+{
+	call_stub_t *open_stub = NULL;
+	gf_fop_open_req_t *req = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	size_t  pathlen = 0;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->ino   = ntoh64 (req->ino);
+		state->path  = req->path;
+		pathlen = STRLEN_0(state->path);
+		state->flags = ntoh32 (req->flags);
+	}
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, 0, NULL, state->path);
+
+	open_stub = fop_open_stub (frame,
+				   server_open_resume,
+				   &(state->loc), state->flags, NULL);
+	GF_VALIDATE_OR_GOTO(bound_xl->name, open_stub, fail);
+
+	if (((state->loc.parent == NULL) && IS_NOT_ROOT(pathlen)) || 
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (open_stub, &state->loc);
+	} else {
+		call_resume (open_stub);
+	}
+	return 0;
+fail:
+	server_open_cbk (frame, NULL, frame->this,
+			 -1, EINVAL,
+			 NULL);
+	return 0;
+}
+
+
+/*
+ * server_readv - readv function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_readv (call_frame_t *frame, xlator_t *bound_xl,
+              gf_hdr_common_t *hdr, size_t hdrlen,
+              char *buf, size_t buflen)
+{
+	gf_fop_read_req_t *req = NULL;
+	server_state_t *state = NULL;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req = gf_param (hdr);
+  
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		state->size   = ntoh32 (req->size);
+		state->offset = ntoh64 (req->offset);
+	}
+
+	GF_VALIDATE_OR_GOTO(bound_xl->name, state->fd, fail);
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": READV \'fd=%"PRId64" (%"PRId64"); "
+		"offset=%"PRId64"; size=%"PRId64,
+		frame->root->unique, state->fd_no, state->fd->inode->ino, 
+		state->offset, (int64_t)state->size);
+
+	STACK_WIND (frame,
+		    server_readv_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->readv,
+		    state->fd, state->size, state->offset);
+	return 0;
+fail:
+	server_readv_cbk (frame, NULL, frame->this,
+			  -1, EINVAL, NULL, 0, NULL);
+	return 0;
+}
+
+
+/*
+ * server_writev - writev function for server
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_writev (call_frame_t *frame, xlator_t *bound_xl,
+               gf_hdr_common_t *hdr, size_t hdrlen,
+               char *buf, size_t buflen)
+{
+	server_connection_t *conn = NULL;
+	gf_fop_write_req_t *req = NULL;
+	struct iovec iov = {0, };
+	dict_t *refs = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		state->offset = ntoh64 (req->offset);
+	}
+
+	GF_VALIDATE_OR_GOTO(bound_xl->name, state->fd, fail);
+
+	iov.iov_base = buf;
+	iov.iov_len = buflen;
+
+	refs = dict_new ();
+	GF_VALIDATE_OR_GOTO(bound_xl->name, refs, fail);
+
+	ret = dict_set_dynptr (refs, NULL, buf, buflen);
+	if (ret < 0) {
+		gf_log (frame->this->name, GF_LOG_ERROR,
+			"fd - %"PRId64" (%"PRId64"): failed to set buffer entry "
+			"to req_refs",
+			state->fd_no, state->fd->inode->ino);
+		goto fail;
+	} else {
+		buf = NULL;
+	}
+
+	frame->root->req_refs = refs;
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": WRITEV \'fd=%"PRId64" (%"PRId64"); "
+		"offset=%"PRId64"; size=%"PRId64,
+		frame->root->unique, state->fd_no, state->fd->inode->ino, 
+		state->offset, (int64_t)buflen);
+
+	STACK_WIND (frame,
+		    server_writev_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->writev,
+		    state->fd, &iov, 1, state->offset);
+	
+	if (refs)
+		dict_unref (refs);
+	return 0;
+fail:
+	server_writev_cbk (frame, NULL, frame->this,
+			   -1, EINVAL, NULL);
+	
+	if (buf)
+		free (buf);
+
+	if (refs)
+		dict_unref (refs);
+
+	return 0;
+}
+
+
+
+/*
+ * server_release - release function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_release (call_frame_t *frame, xlator_t *bound_xl,
+		gf_hdr_common_t *hdr, size_t hdrlen,
+		char *buf, size_t buflen)
+{
+	gf_cbk_release_req_t *req = NULL;
+	server_state_t *state = NULL;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req = gf_param (hdr);
+	state = CALL_STATE(frame);
+	
+	state->fd_no = ntoh64 (req->fd);
+	state->fd = gf_fd_fdptr_get (conn->fdtable, 
+				     state->fd_no);
+	
+	GF_VALIDATE_OR_GOTO(bound_xl->name, state->fd, fail);
+
+	gf_fd_put (conn->fdtable, 
+		   state->fd_no);
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": RELEASE \'fd=%"PRId64" (%"PRId64")\'", 
+		frame->root->unique, state->fd_no, state->fd->inode->ino);
+
+	STACK_WIND (frame,
+		    server_release_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->flush,
+		    state->fd);
+	return 0;
+fail:
+	server_release_cbk (frame, NULL, frame->this,
+			    -1, EINVAL);
+	return 0;
+}
+
+
+/*
+ * server_fsync - fsync function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameters dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_fsync (call_frame_t *frame,
+              xlator_t *bound_xl,
+              gf_hdr_common_t *hdr, size_t hdrlen,
+              char *buf, size_t buflen)
+{
+	gf_fop_fsync_req_t *req = NULL;
+	server_state_t *state = NULL;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		state->flags = ntoh32 (req->data);
+	}
+
+	GF_VALIDATE_OR_GOTO(bound_xl->name, state->fd, fail);
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": FSYNC \'fd=%"PRId64" (%"PRId64")\'", 
+		frame->root->unique, state->fd_no, state->fd->inode->ino);
+
+	STACK_WIND (frame,
+		    server_fsync_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->fsync,
+		    state->fd, state->flags);
+	return 0;
+fail:
+	server_fsync_cbk (frame, NULL, frame->this,
+			  -1, EINVAL);
+
+	return 0;
+}
+
+
+/*
+ * server_flush - flush function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_flush (call_frame_t *frame, xlator_t *bound_xl,
+              gf_hdr_common_t *hdr, size_t hdrlen,
+              char *buf, size_t buflen)
+{
+	gf_fop_flush_req_t *req = NULL;
+	server_state_t *state = NULL;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+	}
+
+	GF_VALIDATE_OR_GOTO(bound_xl->name, state->fd, fail);
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": FLUSH \'fd=%"PRId64" (%"PRId64")\'", 
+		frame->root->unique, state->fd_no, state->fd->inode->ino);
+
+	STACK_WIND (frame,
+		    server_flush_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->flush,
+		    state->fd);
+	return 0;
+
+fail:
+	server_flush_cbk (frame, NULL, frame->this,
+			  -1, EINVAL);
+
+	return 0;
+}
+
+
+/*
+ * server_ftruncate - ftruncate function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameters dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_ftruncate (call_frame_t *frame,
+                  xlator_t *bound_xl,
+                  gf_hdr_common_t *hdr, size_t hdrlen,
+                  char *buf, size_t buflen)
+{
+	gf_fop_ftruncate_req_t *req = NULL;
+	server_state_t *state = NULL;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req = gf_param (hdr);
+
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		state->offset = ntoh64 (req->offset);
+	}
+
+	GF_VALIDATE_OR_GOTO(bound_xl->name, state->fd, fail);
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": FTRUNCATE \'fd=%"PRId64" (%"PRId64"); "
+		"offset=%"PRId64"\'", 
+		frame->root->unique, state->fd_no, state->fd->inode->ino, 
+		state->offset);
+
+	STACK_WIND (frame,
+		    server_ftruncate_cbk,
+		    bound_xl,
+		    bound_xl->fops->ftruncate,
+		    state->fd,
+		    state->offset);
+	return 0;
+fail:
+	server_ftruncate_cbk (frame, NULL, frame->this,
+			      -1, EINVAL, NULL);
+
+	return 0;
+}
+
+
+/*
+ * server_fstat - fstat function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_fstat (call_frame_t *frame,
+              xlator_t *bound_xl,
+              gf_hdr_common_t *hdr, size_t hdrlen,
+              char *buf, size_t buflen)
+{
+	gf_fop_fstat_req_t *req = NULL;
+	server_state_t *state = NULL;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+	}
+
+
+	if (state->fd == NULL) {
+		gf_log (frame->this->name, GF_LOG_ERROR,
+			"fd - %"PRId64": unresolved fd", 
+			state->fd_no);
+
+		server_fstat_cbk (frame, NULL, frame->this,
+				  -1, EINVAL, NULL);
+
+		goto out;
+	}
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": FSTAT \'fd=%"PRId64" (%"PRId64")\'", 
+		frame->root->unique, state->fd_no, state->fd->inode->ino);
+
+	STACK_WIND (frame,
+		    server_fstat_cbk,
+		    bound_xl,
+		    bound_xl->fops->fstat,
+		    state->fd);
+out:
+	return 0;
+}
+
+
+int32_t
+server_truncate_resume (call_frame_t *frame,
+                        xlator_t *this,
+                        loc_t *loc,
+                        off_t offset)
+{
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": TRUNCATE \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+	STACK_WIND (frame,
+		    server_truncate_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->truncate,
+		    loc,
+		    offset);
+	return 0;
+}
+
+
+/*
+ * server_truncate - truncate function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params:
+ *
+ * not for external reference
+ */
+int32_t
+server_truncate (call_frame_t *frame,
+                 xlator_t *bound_xl,
+                 gf_hdr_common_t *hdr, size_t hdrlen,
+                 char *buf, size_t buflen)
+{
+	call_stub_t *truncate_stub = NULL;
+	gf_fop_truncate_req_t *req = NULL;
+	server_state_t *state = NULL;
+  	int32_t ret = -1;
+	size_t pathlen = 0;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		pathlen = STRLEN_0(req->path);
+		state->offset = ntoh64 (req->offset);
+
+		state->path = req->path;
+		state->ino  = ntoh64 (req->ino);
+	}
+
+
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, 0, NULL, state->path);
+
+	truncate_stub = fop_truncate_stub (frame,
+					   server_truncate_resume,
+					   &(state->loc),
+					   state->offset);
+	if ((state->loc.parent == NULL) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (truncate_stub, &(state->loc));
+	} else {
+		call_resume (truncate_stub);
+	}
+
+	return 0;
+}
+
+
+
+
+
+int32_t
+server_unlink_resume (call_frame_t *frame,
+                      xlator_t *this,
+                      loc_t *loc)
+{
+	server_state_t *state = NULL;
+
+	state = CALL_STATE(frame);
+
+	if (state->loc.parent == NULL)
+		state->loc.parent = inode_ref (loc->parent);
+
+	if (state->loc.inode == NULL)
+		state->loc.inode = inode_ref (loc->inode);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": UNLINK \'%"PRId64"/%s (%"PRId64")\'", 
+		frame->root->unique, state->par, state->path, 
+		state->loc.inode->ino);
+
+	STACK_WIND (frame,
+		    server_unlink_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->unlink,
+		    loc);
+	return 0;
+}
+
+/*
+ * server_unlink - unlink function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_unlink (call_frame_t *frame,
+               xlator_t *bound_xl,
+               gf_hdr_common_t *hdr, size_t hdrlen,
+               char *buf, size_t buflen)
+{
+	call_stub_t *unlink_stub = NULL;
+	gf_fop_unlink_req_t *req = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	size_t  pathlen = 0;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+
+	pathlen = STRLEN_0(req->path);
+	
+	state->par   = ntoh64 (req->par);
+	state->path  = req->path;
+	if (IS_NOT_ROOT(pathlen))
+		state->bname = req->bname + pathlen;
+
+	ret = server_loc_fill (&(state->loc), state,
+			       0, state->par, state->bname,
+			       state->path);
+
+	unlink_stub = fop_unlink_stub (frame,
+				       server_unlink_resume,
+				       &(state->loc));
+
+	if ((state->loc.parent == NULL) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (unlink_stub, &state->loc);
+	} else {
+		call_resume (unlink_stub);
+	}
+
+	return 0;
+}
+
+
+
+
+
+int32_t
+server_setxattr_resume (call_frame_t *frame,
+                        xlator_t *this,
+                        loc_t *loc,
+                        dict_t *dict,
+                        int32_t flags)
+{
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": SETXATTR \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+	STACK_WIND (frame,
+		    server_setxattr_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->setxattr,
+		    loc,
+		    dict,
+		    flags);
+	return 0;
+}
+
+/*
+ * server_setxattr - setxattr function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+
+int32_t
+server_setxattr (call_frame_t *frame,
+                 xlator_t *bound_xl,
+                 gf_hdr_common_t *hdr, size_t hdrlen,
+                 char *buf, size_t buflen)
+{
+	call_stub_t *setxattr_stub = NULL;
+	gf_fop_setxattr_req_t *req = NULL;
+	dict_t *dict = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	size_t pathlen = 0;
+	size_t dict_len = 0;
+	char *req_dictbuf = NULL;
+
+	req = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		dict_len = ntoh32 (req->dict_len);
+
+		state->path     = req->path + dict_len;
+
+		pathlen = STRLEN_0(state->path);
+		state->ino   = ntoh64 (req->ino);
+
+		state->flags = ntoh32 (req->flags);
+	}
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, 0, NULL, state->path);
+
+	{
+		/* Unserialize the dictionary */
+		req_dictbuf = memdup (req->dict, dict_len);
+		GF_VALIDATE_OR_GOTO(bound_xl->name, req_dictbuf, fail);
+
+		dict = dict_new ();
+		GF_VALIDATE_OR_GOTO(bound_xl->name, dict, fail);
+
+		ret = dict_unserialize (req_dictbuf, dict_len, &dict);
+		if (ret < 0) {
+			gf_log (bound_xl->name, GF_LOG_ERROR,
+				"%"PRId64": %s (%"PRId64"): failed to "
+				"unserialize request buffer to dictionary", 
+				frame->root->unique, state->loc.path, 
+				state->ino);
+			free (req_dictbuf);
+			goto fail;
+		} else{
+			dict->extra_free = req_dictbuf;
+		}
+	}
+
+	setxattr_stub = fop_setxattr_stub (frame,
+					   server_setxattr_resume,
+					   &(state->loc),
+					   dict,
+					   state->flags);
+	GF_VALIDATE_OR_GOTO(bound_xl->name, setxattr_stub, fail);
+
+	if (((state->loc.parent == NULL) && IS_NOT_ROOT(pathlen)) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (setxattr_stub, &(state->loc));
+	} else {
+		call_resume (setxattr_stub);
+	}
+	
+	if (dict)
+		dict_unref (dict);
+
+	return 0;
+fail:
+	if (dict)
+		dict_unref (dict);
+
+	server_setxattr_cbk (frame, NULL, frame->this,
+			     -1, ENOENT);
+	return 0;
+	
+}
+
+
+
+int32_t
+server_fxattrop (call_frame_t *frame,
+		xlator_t *bound_xl,
+		gf_hdr_common_t *hdr, size_t hdrlen,
+		char *buf, size_t buflen)
+{
+	server_connection_t *conn = NULL;
+	gf_fop_fxattrop_req_t *req = NULL;
+	dict_t *dict = NULL;
+	server_state_t *state = NULL;
+	size_t dict_len = 0;
+	char *req_dictbuf = NULL;
+	int32_t ret = -1;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		dict_len = ntoh32 (req->dict_len);
+		state->ino = ntoh64 (req->ino);
+		state->flags = ntoh32 (req->flags);
+	}
+
+	if (dict_len) {
+		/* Unserialize the dictionary */
+		req_dictbuf = memdup (req->dict, dict_len);
+		GF_VALIDATE_OR_GOTO(bound_xl->name, req_dictbuf, fail);
+
+		dict = dict_new ();
+		GF_VALIDATE_OR_GOTO(bound_xl->name, dict, fail);
+
+		ret = dict_unserialize (req_dictbuf, dict_len, &dict);
+		if (ret < 0) {
+			gf_log (bound_xl->name, GF_LOG_ERROR,
+				"fd - %"PRId64" (%"PRId64"): failed to unserialize "
+				"request buffer to dictionary", 
+				state->fd_no, state->fd->inode->ino);
+			free (req_dictbuf);
+			goto fail;
+		} else {
+			dict->extra_free = req_dictbuf;
+		}
+	}
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": FXATTROP \'fd=%"PRId64" (%"PRId64")\'", 
+		frame->root->unique, state->fd_no, state->fd->inode->ino);
+
+	STACK_WIND (frame,
+		    server_fxattrop_cbk,
+		    bound_xl,
+		    bound_xl->fops->fxattrop,
+		    state->fd,
+		    state->flags,
+		    dict);
+	if (dict)
+		dict_unref (dict);
+	return 0;
+fail:
+	if (dict)
+		dict_unref (dict);
+
+	server_fxattrop_cbk (frame, NULL, frame->this,
+			     -1, EINVAL, NULL);
+	return 0;
+}
+
+int32_t
+server_xattrop_resume (call_frame_t *frame,
+		       xlator_t *this,
+		       loc_t *loc,
+		       gf_xattrop_flags_t flags,
+		       dict_t *dict)
+{
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": XATTROP \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+	STACK_WIND (frame,
+		    server_xattrop_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->xattrop,
+		    loc,
+		    flags,
+		    dict);
+	return 0;
+}
+
+int32_t
+server_xattrop (call_frame_t *frame,
+		xlator_t *bound_xl,
+		gf_hdr_common_t *hdr, size_t hdrlen,
+		char *buf, size_t buflen)
+{
+	gf_fop_xattrop_req_t *req = NULL;
+	dict_t *dict = NULL;
+	server_state_t *state = NULL;
+	call_stub_t *xattrop_stub = NULL;
+	int32_t ret = -1;
+	size_t pathlen = 0;
+	size_t dict_len = 0;
+	char *req_dictbuf = NULL;
+	
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		dict_len = ntoh32 (req->dict_len);
+		state->ino = ntoh64 (req->ino);
+		state->path  = req->path + dict_len;
+		pathlen = STRLEN_0(state->path);
+		state->flags = ntoh32 (req->flags);
+	}
+
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, 0, NULL, state->path);
+	
+	if (dict_len) {
+		/* Unserialize the dictionary */
+		req_dictbuf = memdup (req->dict, dict_len);
+		GF_VALIDATE_OR_GOTO(bound_xl->name, req_dictbuf, fail);
+
+		dict = dict_new ();
+		GF_VALIDATE_OR_GOTO(bound_xl->name, dict, fail);
+
+		ret = dict_unserialize (req_dictbuf, dict_len, &dict);
+		if (ret < 0) {
+			gf_log (bound_xl->name, GF_LOG_ERROR,
+				"%s (%"PRId64"): failed to unserialize "
+				"request buffer to dictionary", 
+				state->loc.path, state->ino);
+			goto fail;
+		} else { 
+			dict->extra_free = req_dictbuf;
+		}
+	}
+	xattrop_stub = fop_xattrop_stub (frame,
+					 server_xattrop_resume,
+					 &(state->loc),
+					 state->flags,
+					 dict);
+	GF_VALIDATE_OR_GOTO(bound_xl->name, xattrop_stub, fail);
+
+	if (((state->loc.parent == NULL) && IS_NOT_ROOT(pathlen)) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (xattrop_stub, &(state->loc));
+	} else {
+		call_resume (xattrop_stub);
+	}
+
+	if (dict)
+		dict_unref (dict);
+	return 0;
+fail:
+	if (dict)
+		dict_unref (dict);
+
+	server_xattrop_cbk (frame, NULL, frame->this,
+			    -1, EINVAL,
+			    NULL);
+	return 0;
+}
+
+
+int32_t
+server_getxattr_resume (call_frame_t *frame,
+                        xlator_t *this,
+                        loc_t *loc,
+                        const char *name)
+{
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": GETXATTR \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+	STACK_WIND (frame,
+		    server_getxattr_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->getxattr,
+		    loc,
+		    name);
+	return 0;
+}
+
+/*
+ * server_getxattr - getxattr function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_getxattr (call_frame_t *frame,
+                 xlator_t *bound_xl,
+                 gf_hdr_common_t *hdr, size_t hdrlen,
+                 char *buf, size_t buflen)
+{
+	gf_fop_getxattr_req_t *req = NULL;
+	call_stub_t *getxattr_stub = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	size_t namelen = 0;
+	size_t pathlen = 0;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		pathlen = STRLEN_0(req->path);
+
+		state->path = req->path;
+		state->ino  = ntoh64 (req->ino);
+
+		namelen = ntoh32 (req->namelen);
+		if (namelen)
+			state->name = (req->name + pathlen);
+	}
+
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, 0, NULL, state->path);
+
+	getxattr_stub = fop_getxattr_stub (frame,
+					   server_getxattr_resume,
+					   &(state->loc),
+					   state->name);
+
+	if (((state->loc.parent == NULL) && IS_NOT_ROOT(pathlen)) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (getxattr_stub, &(state->loc));
+	} else {
+		call_resume (getxattr_stub);
+	}
+
+	return 0;
+}
+
+
+
+int32_t
+server_removexattr_resume (call_frame_t *frame,
+                           xlator_t *this,
+                           loc_t *loc,
+                           const char *name)
+{
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": REMOVEXATTR \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+	STACK_WIND (frame,
+		    server_removexattr_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->removexattr,
+		    loc,
+		    name);
+	return 0;
+}
+
+/*
+ * server_removexattr - removexattr function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_removexattr (call_frame_t *frame,
+                    xlator_t *bound_xl,
+                    gf_hdr_common_t *hdr, size_t hdrlen,
+                    char *buf, size_t buflen)
+{
+	gf_fop_removexattr_req_t *req = NULL;
+	call_stub_t *removexattr_stub = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	size_t pathlen = 0;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		pathlen = STRLEN_0(req->path);
+
+		state->path = req->path;
+		state->ino  = ntoh64 (req->ino);
+
+		state->name = (req->name + pathlen);
+	}
+
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, 0, NULL, state->path);
+
+	removexattr_stub = fop_removexattr_stub (frame,
+						 server_removexattr_resume,
+						 &(state->loc),
+						 state->name);
+
+	if (((state->loc.parent == NULL) && IS_NOT_ROOT(pathlen)) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (removexattr_stub, &(state->loc));
+	} else {
+		call_resume (removexattr_stub);
+	}
+
+	return 0;
+}
+
+
+/*
+ * server_statfs - statfs function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_statfs (call_frame_t *frame,
+               xlator_t *bound_xl,
+               gf_hdr_common_t *hdr, size_t hdrlen,
+               char *buf, size_t buflen)
+{
+	gf_fop_statfs_req_t *req = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+
+	req = gf_param (hdr);
+
+	state = CALL_STATE(frame);
+	state->ino  = ntoh64 (req->ino);
+	state->path = req->path;
+
+	ret = server_loc_fill (&state->loc, state,
+			       state->ino, 0, NULL, state->path);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": STATFS \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+	STACK_WIND (frame,
+		    server_statfs_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->statfs,
+		    &(state->loc));
+
+	return 0;
+}
+
+
+
+int32_t
+server_opendir_resume (call_frame_t *frame,
+                       xlator_t *this,
+                       loc_t *loc,
+                       fd_t *fd)
+{
+	server_state_t *state = CALL_STATE(frame);
+	fd_t *new_fd = NULL;
+
+	new_fd = fd_create (loc->inode, frame->root->pid);
+	state->fd = fd_ref (new_fd);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": OPENDIR \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+	STACK_WIND (frame,
+		    server_opendir_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->opendir,
+		    loc,
+		    state->fd);
+	return 0;
+}
+
+
+/*
+ * server_opendir - opendir function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_opendir (call_frame_t *frame, xlator_t *bound_xl,
+                gf_hdr_common_t *hdr, size_t hdrlen,
+                char *buf, size_t buflen)
+{
+	call_stub_t *opendir_stub = NULL;
+	gf_fop_opendir_req_t *req = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	size_t  pathlen = 0;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->path  = req->path;
+		pathlen = STRLEN_0(state->path);
+		state->ino   = ntoh64 (req->ino);
+	}
+
+	ret = server_loc_fill (&state->loc, state,
+			       state->ino, 0, NULL, state->path);
+
+	opendir_stub = fop_opendir_stub (frame,
+					 server_opendir_resume,
+					 &(state->loc),
+					 NULL);
+
+	if (((state->loc.parent == NULL) && IS_NOT_ROOT(pathlen)) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (opendir_stub, &(state->loc));
+	} else {
+		call_resume (opendir_stub);
+	}
+
+	return 0;
+}
+
+
+/*
+ * server_releasedir - releasedir function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_releasedir (call_frame_t *frame, xlator_t *bound_xl,
+		   gf_hdr_common_t *hdr, size_t hdrlen,
+		   char *buf, size_t buflen)
+{
+	gf_cbk_releasedir_req_t *req = NULL;
+	server_state_t *state = NULL;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req = gf_param (hdr);
+	state = CALL_STATE(frame);
+
+	state->fd_no = ntoh64 (req->fd);
+	state->fd    = gf_fd_fdptr_get (conn->fdtable, 
+					state->fd_no);
+
+	if (state->fd == NULL) {
+		gf_log (frame->this->name, GF_LOG_ERROR,
+			"fd - %"PRId64": unresolved fd", 
+			state->fd_no);
+
+		server_releasedir_cbk (frame, NULL, frame->this,
+				       -1, EINVAL);
+		goto out;
+	}
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": RELEASEDIR \'fd=%"PRId64" (%"PRId64")\'", 
+		frame->root->unique, state->fd_no, state->fd->inode->ino);
+
+	gf_fd_put (conn->fdtable, state->fd_no);
+
+	server_releasedir_cbk (frame, NULL, frame->this,
+			       0, 0);
+out:
+	return 0;
+}
+
+
+/*
+ * server_readdir - readdir function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_getdents (call_frame_t *frame,
+                 xlator_t *bound_xl,
+                 gf_hdr_common_t *hdr, size_t hdrlen,
+                 char *buf, size_t buflen)
+{
+	gf_fop_getdents_req_t *req = NULL;
+	server_state_t *state = NULL;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		state->size = ntoh32 (req->size);
+		state->offset = ntoh64 (req->offset);
+		state->flags = ntoh32 (req->flags);
+	}
+
+
+	if (state->fd == NULL) {
+		gf_log (frame->this->name, GF_LOG_ERROR,
+			"fd - %"PRId64": unresolved fd", 
+			state->fd_no);
+
+		server_getdents_cbk (frame, NULL, frame->this,
+				     -1, EINVAL, NULL, 0);
+
+		goto out;
+	}
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": GETDENTS \'fd=%"PRId64" (%"PRId64"); "
+		"offset=%"PRId64"; size=%"PRId64, 
+		frame->root->unique, state->fd_no, state->fd->inode->ino, 
+		state->offset, (int64_t)state->size);
+
+	STACK_WIND (frame,
+		    server_getdents_cbk,
+		    bound_xl,
+		    bound_xl->fops->getdents,
+		    state->fd,
+		    state->size,
+		    state->offset,
+		    state->flags);
+out:
+	return 0;
+}
+
+
+/*
+ * server_readdir - readdir function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_readdir (call_frame_t *frame, xlator_t *bound_xl,
+                gf_hdr_common_t *hdr, size_t hdrlen,
+                char *buf, size_t buflen)
+{
+	gf_fop_readdir_req_t *req = NULL;
+	server_state_t *state = NULL;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		state->size   = ntoh32 (req->size);
+		state->offset = ntoh64 (req->offset);
+	}
+
+
+	if (state->fd == NULL) {
+		gf_log (frame->this->name, GF_LOG_ERROR,
+			"fd - %"PRId64": unresolved fd", 
+			state->fd_no);
+
+		server_readdir_cbk (frame, NULL, frame->this,
+				    -1, EINVAL, NULL);
+
+		goto out;
+	}
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": READDIR \'fd=%"PRId64" (%"PRId64"); "
+		"offset=%"PRId64"; size=%"PRId64,
+		frame->root->unique, state->fd_no, state->fd->inode->ino, 
+		state->offset, (int64_t)state->size);
+
+	STACK_WIND (frame,
+		    server_readdir_cbk,
+		    bound_xl,
+		    bound_xl->fops->readdir,
+		    state->fd, state->size, state->offset);
+out:
+	return 0;
+}
+
+
+
+/*
+ * server_fsyncdir - fsyncdir function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_fsyncdir (call_frame_t *frame,
+                 xlator_t *bound_xl,
+                 gf_hdr_common_t *hdr, size_t hdrlen,
+                 char *buf, size_t buflen)
+{
+	gf_fop_fsyncdir_req_t *req = NULL;
+	server_state_t *state = NULL;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		state->flags = ntoh32 (req->data);
+	}
+
+	if (state->fd == NULL) {
+		gf_log (frame->this->name, GF_LOG_ERROR,
+			"fd - %"PRId64": unresolved fd", 
+			state->fd_no);
+
+		server_fsyncdir_cbk (frame, NULL, frame->this,
+				     -1, EINVAL);
+		goto out;
+	}
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": FSYNCDIR \'fd=%"PRId64" (%"PRId64")\'", 
+		frame->root->unique, state->fd_no, state->fd->inode->ino);
+
+	STACK_WIND (frame,
+		    server_fsyncdir_cbk,
+		    bound_xl,
+		    bound_xl->fops->fsyncdir,
+		    state->fd, state->flags);
+out:
+	return 0;
+}
+
+
+int32_t
+server_mknod_resume (call_frame_t *frame,
+		     xlator_t *this,
+		     loc_t *loc,
+		     mode_t mode,
+		     dev_t dev)
+{
+	server_state_t *state = NULL;
+
+	state = CALL_STATE(frame);
+
+	if (state->loc.parent == NULL)
+		state->loc.parent = inode_ref (loc->parent);
+
+	state->loc.inode = inode_new (state->itable);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": MKNOD \'%"PRId64"/%s\'", 
+		frame->root->unique, state->par, state->bname);
+
+	STACK_WIND (frame,
+		    server_mknod_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->mknod,
+		    &(state->loc), mode, dev);
+
+	return 0;
+}
+/*
+ * server_mknod - mknod function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_mknod (call_frame_t *frame,
+              xlator_t *bound_xl,
+              gf_hdr_common_t *hdr, size_t hdrlen,
+              char *buf, size_t buflen)
+{
+	gf_fop_mknod_req_t *req = NULL;
+	server_state_t *state = NULL;
+	call_stub_t *mknod_stub = NULL;
+	int32_t ret = -1;
+	size_t pathlen = 0;
+		
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		pathlen = STRLEN_0(req->path);
+		
+		state->par  = ntoh64 (req->par);
+		state->path = req->path;
+		if (IS_NOT_ROOT(pathlen))
+			state->bname = req->bname + pathlen;
+
+		state->mode = ntoh32 (req->mode);
+		state->dev  = ntoh64 (req->dev);
+	}
+	ret = server_loc_fill (&(state->loc), state,
+			       0, state->par, state->bname,
+			       state->path);
+
+	mknod_stub = fop_mknod_stub (frame, server_mknod_resume,
+				     &(state->loc), state->mode, state->dev);
+
+	if (state->loc.parent == NULL) {
+		do_path_lookup (mknod_stub, &(state->loc));
+	} else {
+		call_resume (mknod_stub);
+	}
+
+	return 0;
+}
+
+int32_t
+server_mkdir_resume (call_frame_t *frame,
+		     xlator_t *this,
+		     loc_t *loc,
+		     mode_t mode)
+
+{
+	server_state_t *state = NULL;
+
+	state = CALL_STATE(frame);
+
+	if (state->loc.parent == NULL)
+		state->loc.parent = inode_ref (loc->parent);
+
+	state->loc.inode = inode_new (state->itable);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": MKDIR \'%"PRId64"/%s\'", 
+		frame->root->unique, state->par, state->bname);
+
+	STACK_WIND (frame,
+		    server_mkdir_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->mkdir,
+		    &(state->loc),
+		    state->mode);
+
+	return 0;
+}
+
+/*
+ * server_mkdir - mkdir function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params:
+ *
+ * not for external reference
+ */
+int32_t
+server_mkdir (call_frame_t *frame,
+              xlator_t *bound_xl,
+              gf_hdr_common_t *hdr, size_t hdrlen,
+              char *buf, size_t buflen)
+{
+	gf_fop_mkdir_req_t *req = NULL;
+	server_state_t *state = NULL;
+	call_stub_t *mkdir_stub = NULL;
+	int32_t ret = -1;
+	size_t pathlen = 0;
+		
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		pathlen = STRLEN_0(req->path);
+		state->mode = ntoh32 (req->mode);
+
+		state->path     = req->path;
+		state->bname = req->bname + pathlen;
+		state->par      = ntoh64 (req->par);
+	}
+
+
+	ret = server_loc_fill (&(state->loc), state,
+			       0, state->par, state->bname,
+			       state->path);
+
+	mkdir_stub = fop_mkdir_stub (frame, server_mkdir_resume,
+				     &(state->loc), state->mode);
+
+	if (state->loc.parent == NULL) {
+		do_path_lookup (mkdir_stub, &(state->loc));
+	} else {
+		call_resume (mkdir_stub);
+	}
+
+	return 0;
+}
+
+
+int32_t
+server_rmdir_resume (call_frame_t *frame,
+                     xlator_t *this,
+                     loc_t *loc)
+{
+	server_state_t *state = NULL;
+
+	state = CALL_STATE(frame);
+
+	if (state->loc.parent == NULL)
+		state->loc.parent = inode_ref (loc->parent);
+
+	if (state->loc.inode == NULL)
+		state->loc.inode = inode_ref (loc->inode);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": RMDIR \'%"PRId64"/%s\'", 
+		frame->root->unique, state->par, state->bname);
+
+	STACK_WIND (frame,
+		    server_rmdir_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->rmdir,
+		    loc);
+	return 0;
+}
+
+/*
+ * server_rmdir - rmdir function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params:
+ *
+ * not for external reference
+ */
+int32_t
+server_rmdir (call_frame_t *frame,
+              xlator_t *bound_xl,
+              gf_hdr_common_t *hdr, size_t hdrlen,
+              char *buf, size_t buflen)
+{
+	call_stub_t *rmdir_stub = NULL;
+	gf_fop_rmdir_req_t *req = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	size_t pathlen = 0;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		pathlen = STRLEN_0(req->path);
+		state->path = req->path;
+		state->par  = ntoh64 (req->par);
+		state->bname = req->bname + pathlen;
+	}
+
+
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, state->par, state->bname,
+			       state->path);
+
+	rmdir_stub = fop_rmdir_stub (frame,
+				     server_rmdir_resume,
+				     &(state->loc));
+
+	if ((state->loc.parent == NULL) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (rmdir_stub, &(state->loc));
+	} else {
+		call_resume (rmdir_stub);
+	}
+
+	return 0;
+}
+
+
+
+int32_t
+server_chown_resume (call_frame_t *frame,
+                     xlator_t *this,
+                     loc_t *loc,
+                     uid_t uid,
+                     gid_t gid)
+{
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": CHOWN \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+	STACK_WIND (frame, server_chown_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->chown,
+		    loc, uid, gid);
+	return 0;
+}
+
+
+/*
+ * server_chown - chown function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_chown (call_frame_t *frame,
+              xlator_t *bound_xl,
+              gf_hdr_common_t *hdr, size_t hdrlen,
+              char *buf, size_t buflen)
+{
+	call_stub_t *chown_stub = NULL;
+	gf_fop_chown_req_t *req = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	size_t  pathlen = 0;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->ino  = ntoh64 (req->ino);
+		state->path = req->path;
+		pathlen = STRLEN_0(state->path);
+		state->uid   = ntoh32 (req->uid);
+		state->gid   = ntoh32 (req->gid);
+	}
+
+
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, 0, NULL, state->path);
+
+	chown_stub = fop_chown_stub (frame,
+				     server_chown_resume,
+				     &(state->loc),
+				     state->uid,
+				     state->gid);
+
+	if (((state->loc.parent == NULL) && IS_NOT_ROOT(pathlen)) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (chown_stub, &(state->loc));
+	} else {
+		call_resume (chown_stub);
+	}
+
+	return 0;
+}
+
+
+int32_t
+server_chmod_resume (call_frame_t *frame,
+                     xlator_t *this,
+                     loc_t *loc,
+                     mode_t mode)
+{
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": CHMOD \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+	STACK_WIND (frame,
+		    server_chmod_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->chmod,
+		    loc,
+		    mode);
+	return 0;
+
+}
+
+/*
+ * server_chmod - chmod function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_chmod (call_frame_t *frame,
+              xlator_t *bound_xl,
+              gf_hdr_common_t *hdr, size_t hdrlen,
+              char *buf, size_t buflen)
+{
+	call_stub_t *chmod_stub = NULL;
+	gf_fop_chmod_req_t *req = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	size_t  pathlen = 0;
+
+	req       = gf_param (hdr);
+
+	state = CALL_STATE(frame);
+	{
+		state->ino  = ntoh64 (req->ino);
+		state->path = req->path;
+		pathlen = STRLEN_0(state->path);
+
+		state->mode = ntoh32 (req->mode);
+	}
+
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, 0, NULL, state->path);
+
+	chmod_stub = fop_chmod_stub (frame,
+				     server_chmod_resume,
+				     &(state->loc),
+				     state->mode);
+
+	if (((state->loc.parent == NULL) && IS_NOT_ROOT(pathlen)) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (chmod_stub, &(state->loc));
+	} else {
+		call_resume (chmod_stub);
+	}
+
+	return 0;
+}
+
+
+int32_t
+server_utimens_resume (call_frame_t *frame,
+                       xlator_t *this,
+                       loc_t *loc,
+                       struct timespec *tv)
+{
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": UTIMENS \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+	STACK_WIND (frame,
+		    server_utimens_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->utimens,
+		    loc,
+		    tv);
+	return 0;
+}
+
+/*
+ * server_utimens - utimens function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_utimens (call_frame_t *frame,
+                xlator_t *bound_xl,
+                gf_hdr_common_t *hdr, size_t hdrlen,
+                char *buf, size_t buflen)
+{
+	call_stub_t *utimens_stub = NULL;
+	gf_fop_utimens_req_t *req = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	size_t  pathlen = 0;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->ino  = ntoh64 (req->ino);
+		state->path = req->path;
+		pathlen = STRLEN_0(state->path);
+
+		gf_timespec_to_timespec (req->tv, state->tv);
+	}
+
+
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, 0, NULL, state->path);
+
+	utimens_stub = fop_utimens_stub (frame,
+					 server_utimens_resume,
+					 &(state->loc),
+					 state->tv);
+
+	if (((state->loc.parent == NULL) && IS_NOT_ROOT(pathlen)) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (utimens_stub, &(state->loc));
+	} else {
+		call_resume (utimens_stub);
+	}
+
+	return 0;
+}
+
+
+
+int32_t
+server_inodelk_resume (call_frame_t *frame,
+		       xlator_t *this,
+		       loc_t *loc, int32_t cmd,
+		       struct flock *flock)
+{
+	server_state_t *state = NULL;
+
+	state = CALL_STATE(frame);
+	if (state->loc.inode == NULL) {
+		state->loc.inode = inode_ref (loc->inode);
+	}
+
+	if (state->loc.parent == NULL) {
+		state->loc.parent = inode_ref (loc->parent);
+	}
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": INODELK \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+ 	STACK_WIND (frame,
+ 		    server_inodelk_cbk,
+ 		    BOUND_XL(frame),
+ 		    BOUND_XL(frame)->fops->inodelk,
+ 		    loc, cmd, flock);
+ 	return 0;
+
+}
+
+
+int32_t
+server_inodelk (call_frame_t *frame,
+		xlator_t *bound_xl,
+		gf_hdr_common_t *hdr, size_t hdrlen,
+		char *buf, size_t buflen)
+{
+ 	call_stub_t *inodelk_stub = NULL;
+ 	gf_fop_inodelk_req_t *req = NULL;
+ 	server_state_t *state = NULL;
+	size_t pathlen = 0;
+
+ 	req   = gf_param (hdr);
+ 	state = CALL_STATE(frame);
+	{
+		state->cmd = ntoh32 (req->cmd);
+		switch (state->cmd) {
+		case GF_LK_GETLK:
+			state->cmd = F_GETLK;
+			break;
+		case GF_LK_SETLK:
+			state->cmd = F_SETLK;
+			break;
+		case GF_LK_SETLKW:
+			state->cmd = F_SETLKW;
+			break;
+		}
+
+		state->type = ntoh32 (req->type);
+
+		pathlen = STRLEN_0(req->path);
+
+		state->path = req->path;
+		state->ino  = ntoh64 (req->ino);
+
+		gf_flock_to_flock (&req->flock, &state->flock);
+
+		switch (state->type) {
+		case GF_LK_F_RDLCK: 
+			state->flock.l_type = F_RDLCK; 
+			break;
+		case GF_LK_F_WRLCK: 
+			state->flock.l_type = F_WRLCK; 
+			break;
+		case GF_LK_F_UNLCK: 
+			state->flock.l_type = F_UNLCK; 
+			break;
+		}
+
+	}
+
+	server_loc_fill (&(state->loc), state, 
+			 state->ino, 0, NULL, state->path);
+
+ 	inodelk_stub = fop_inodelk_stub (frame,
+					 server_inodelk_resume,
+					 &state->loc, state->cmd, &state->flock);
+
+	if ((state->loc.parent == NULL) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (inodelk_stub, &(state->loc));
+	} else {
+		call_resume (inodelk_stub);
+	}
+
+ 	return 0;
+}
+
+
+int32_t
+server_finodelk (call_frame_t *frame,
+		 xlator_t *bound_xl,
+		 gf_hdr_common_t *hdr, size_t hdrlen,
+		 char *buf, size_t buflen)
+{
+ 	gf_fop_finodelk_req_t *req = NULL;
+ 	server_state_t *state = NULL;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+ 	req   = gf_param (hdr);
+ 	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		state->cmd = ntoh32 (req->cmd);
+		switch (state->cmd) {
+		case GF_LK_GETLK:
+			state->cmd = F_GETLK;
+			break;
+		case GF_LK_SETLK:
+			state->cmd = F_SETLK;
+			break;
+		case GF_LK_SETLKW:
+			state->cmd = F_SETLKW;
+			break;
+		}
+
+		state->type = ntoh32 (req->type);
+
+		gf_flock_to_flock (&req->flock, &state->flock);
+
+		switch (state->type) {
+		case GF_LK_F_RDLCK: 
+			state->flock.l_type = F_RDLCK; 
+			break;
+		case GF_LK_F_WRLCK: 
+			state->flock.l_type = F_WRLCK; 
+			break;
+		case GF_LK_F_UNLCK: 
+			state->flock.l_type = F_UNLCK; 
+			break;
+		}
+
+	}
+
+	if (state->fd == NULL) {
+		gf_log (frame->this->name, GF_LOG_ERROR,
+			"fd - %"PRId64": unresolved fd", 
+			state->fd_no);
+		
+		server_finodelk_cbk (frame, NULL, frame->this,
+				     -1, EINVAL);
+		return -1;
+  	} 
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": FINODELK \'fd=%"PRId64" (%"PRId64")\'", 
+		frame->root->unique, state->fd_no, state->fd->inode->ino);
+
+	STACK_WIND (frame, server_finodelk_cbk,
+		    BOUND_XL(frame), 
+		    BOUND_XL(frame)->fops->finodelk,
+		    state->fd, state->cmd, &state->flock);
+ 	return 0;
+}
+  
+ 
+int32_t
+server_entrylk_resume (call_frame_t *frame,
+		       xlator_t *this,
+		       loc_t *loc, const char *name,
+		       entrylk_cmd cmd, entrylk_type type)
+{
+	server_state_t *state = NULL;
+
+	state = CALL_STATE(frame);
+
+	if (state->loc.inode == NULL)
+		state->loc.inode = inode_ref (loc->inode);
+
+	if ((state->loc.parent == NULL) &&
+	    (loc->parent))
+		state->loc.parent = inode_ref (loc->parent);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": ENTRYLK \'%s (%"PRId64") \'", 
+		frame->root->unique, state->path, state->ino);
+
+ 	STACK_WIND (frame,
+ 		    server_entrylk_cbk,
+ 		    BOUND_XL(frame),
+ 		    BOUND_XL(frame)->fops->entrylk,
+ 		    loc, name, cmd, type);
+ 	return 0;
+
+}
+
+/*
+ * server_entrylk - entrylk function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_entrylk (call_frame_t *frame,
+		xlator_t *bound_xl,
+		gf_hdr_common_t *hdr, size_t hdrlen,
+		char *buf, size_t buflen)
+{
+ 	gf_fop_entrylk_req_t *req = NULL;
+ 	server_state_t *state = NULL;
+ 	call_stub_t *entrylk_stub = NULL;
+	size_t pathlen = 0;
+	size_t namelen = 0;
+
+ 	req   = gf_param (hdr);
+ 	state = CALL_STATE(frame);
+	{
+		pathlen = STRLEN_0(req->path);
+
+		state->path = req->path;
+		state->ino  = ntoh64 (req->ino);
+		namelen = ntoh64 (req->namelen);
+		if (namelen)
+			state->name = req->name + pathlen;
+
+		state->cmd  = ntoh32 (req->cmd);
+		state->type = ntoh32 (req->type);
+	}
+
+
+ 	server_loc_fill (&(state->loc), state, 
+			 state->ino, 0, NULL, state->path);
+
+  	entrylk_stub = fop_entrylk_stub (frame,
+					 server_entrylk_resume,
+					 &state->loc, state->name, state->cmd,
+					 state->type);
+
+ 	if (((state->loc.parent == NULL) && IS_NOT_ROOT(pathlen)) ||
+	    (state->loc.inode == NULL)) {
+ 		do_path_lookup (entrylk_stub, &(state->loc));
+ 	} else {
+ 		call_resume (entrylk_stub);
+ 	}
+
+ 	return 0;
+}
+
+
+int32_t
+server_fentrylk (call_frame_t *frame,
+		 xlator_t *bound_xl,
+		 gf_hdr_common_t *hdr, size_t hdrlen,
+		 char *buf, size_t buflen)
+{
+ 	gf_fop_fentrylk_req_t *req = NULL;
+ 	server_state_t *state = NULL;
+	size_t  namelen = 0;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+ 	req   = gf_param (hdr);
+ 	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		state->cmd  = ntoh32 (req->cmd);
+		state->type = ntoh32 (req->type);
+		namelen = ntoh64 (req->namelen);
+		
+		if (namelen)
+			state->name = req->name;
+	}
+
+	if (state->fd == NULL) {
+		gf_log (frame->this->name, GF_LOG_ERROR,
+			"fd - %"PRId64": unresolved fd", 
+			state->fd_no);
+		
+		server_fentrylk_cbk (frame, NULL, frame->this,
+				     -1, EINVAL);
+		return -1;
+  	} 
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": FENTRYLK \'fd=%"PRId64" (%"PRId64")\'", 
+		frame->root->unique, state->fd_no, state->fd->inode->ino);
+
+	STACK_WIND (frame, server_fentrylk_cbk,
+		    BOUND_XL(frame), 
+		    BOUND_XL(frame)->fops->fentrylk,
+		    state->fd, state->name, state->cmd, state->type);
+ 	return 0;
+}
+
+
+int32_t
+server_access_resume (call_frame_t *frame,
+                      xlator_t *this,
+                      loc_t *loc,
+                      int32_t mask)
+{
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": ACCESS \'%s (%"PRId64")\'", 
+		frame->root->unique, state->path, state->ino);
+
+	STACK_WIND (frame,
+		    server_access_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->access,
+		    loc,
+		    mask);
+	return 0;
+}
+
+/*
+ * server_access - access function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_access (call_frame_t *frame,
+               xlator_t *bound_xl,
+               gf_hdr_common_t *hdr, size_t hdrlen,
+               char *buf, size_t buflen)
+{
+	call_stub_t *access_stub = NULL;
+	gf_fop_access_req_t *req = NULL;
+	server_state_t *state = NULL;
+	int32_t ret = -1;
+	size_t  pathlen = 0;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+
+	state->mask  = ntoh32 (req->mask);
+
+	state->ino  = ntoh64 (req->ino);
+	state->path = req->path;
+	pathlen = STRLEN_0(state->path);
+
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, 0, NULL, state->path);
+
+	access_stub = fop_access_stub (frame,
+				       server_access_resume,
+				       &(state->loc),
+				       state->mask);
+
+	if (((state->loc.parent == NULL) && IS_NOT_ROOT(pathlen)) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (access_stub, &(state->loc));
+	} else {
+		call_resume (access_stub);
+	}
+
+	return 0;
+}
+
+
+int32_t
+server_symlink_resume (call_frame_t *frame,
+		       xlator_t *this,
+		       const char *linkname,
+		       loc_t *loc)
+{
+	server_state_t *state = NULL;
+
+	state = CALL_STATE(frame);
+	if (state->loc.parent == NULL)
+		state->loc.parent = inode_ref (loc->parent);
+
+	state->loc.inode = inode_new (BOUND_XL(frame)->itable);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": SYMLINK \'%"PRId64"/%s \'", 
+		frame->root->unique, state->par, state->bname);
+
+	STACK_WIND (frame,
+		    server_symlink_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->symlink,
+		    linkname,
+		    &(state->loc));
+
+	return 0;
+}
+
+/*
+ * server_symlink- symlink function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+
+int32_t
+server_symlink (call_frame_t *frame,
+                xlator_t *bound_xl,
+                gf_hdr_common_t *hdr, size_t hdrlen,
+                char *buf, size_t buflen)
+{
+	server_state_t *state = NULL;
+	gf_fop_symlink_req_t *req = NULL;
+	call_stub_t *symlink_stub = NULL;
+	int32_t ret = -1;
+	size_t  pathlen = 0;
+	size_t  baselen = 0;
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		pathlen = STRLEN_0(req->path);
+		baselen = STRLEN_0(req->bname + pathlen);
+		
+		state->par  = ntoh64 (req->par);
+		state->path = req->path;
+		state->bname = req->bname + pathlen;
+
+		state->name = (req->linkname + pathlen + baselen);
+	}
+
+	ret = server_loc_fill (&(state->loc), state,
+			       0, state->par, state->bname,
+			       state->path);
+
+	symlink_stub = fop_symlink_stub (frame, server_symlink_resume,
+					 state->name, &(state->loc));
+
+	if (state->loc.parent == NULL) {
+		do_path_lookup (symlink_stub, &(state->loc));
+	} else {
+		call_resume (symlink_stub);
+	}
+
+	return 0;
+}
+
+int32_t
+server_link_resume (call_frame_t *frame,
+                    xlator_t *this,
+                    loc_t *oldloc,
+		    loc_t *newloc)
+{
+	server_state_t *state = NULL;
+
+	state = CALL_STATE(frame);
+
+	if (state->loc.parent == NULL)
+		state->loc.parent = inode_ref (oldloc->parent);
+
+	if (state->loc.inode == NULL) {
+		state->loc.inode = inode_ref (oldloc->inode);
+	} else if (state->loc.inode != oldloc->inode) {
+		if (state->loc.inode)
+			inode_unref (state->loc.inode);
+		state->loc.inode = inode_ref (oldloc->inode);
+	}
+
+	if (state->loc2.parent == NULL)
+		state->loc2.parent = inode_ref (newloc->parent);
+
+	state->loc2.inode = inode_ref (state->loc.inode);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": LINK \'%"PRId64"/%s ==> %s (%"PRId64")\'", 
+		frame->root->unique, state->par2, state->bname2, 
+		state->path, state->ino);
+
+	STACK_WIND (frame,
+		    server_link_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->link,
+		    &(state->loc),
+		    &(state->loc2));
+	return 0;
+}
+
+/*
+ * server_link - link function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params:
+ *
+ * not for external reference
+ */
+int32_t
+server_link (call_frame_t *frame,
+             xlator_t *this,
+             gf_hdr_common_t *hdr, size_t hdrlen,
+             char *buf, size_t buflen)
+{
+	gf_fop_link_req_t *req = NULL;
+	server_state_t *state = NULL;
+	call_stub_t    *link_stub = NULL;
+	int32_t ret = -1;
+	size_t  oldpathlen = 0;
+	size_t  newpathlen = 0;
+	size_t  newbaselen = 0;
+
+	req   = gf_param (hdr);
+
+	state = CALL_STATE(frame);
+	{
+		oldpathlen = STRLEN_0(req->oldpath);
+		newpathlen = STRLEN_0(req->newpath     + oldpathlen);
+		newbaselen = STRLEN_0(req->newbname + oldpathlen + newpathlen);
+
+		state->path      = req->oldpath;
+		state->path2     = req->newpath     + oldpathlen;
+		state->bname2 = req->newbname + oldpathlen + newpathlen;
+		state->ino   = ntoh64 (req->oldino);
+		state->par2  = ntoh64 (req->newpar);
+	}
+
+	ret = server_loc_fill (&(state->loc), state,
+			       state->ino, 0, NULL,
+			       state->path);
+	ret = server_loc_fill (&(state->loc2), state,
+			       0, state->par2, state->bname2,
+			       state->path2);
+
+	link_stub = fop_link_stub (frame, server_link_resume,
+				   &(state->loc), &(state->loc2));
+
+	if ((state->loc.parent == NULL) ||
+	    (state->loc.inode == NULL)) {
+		do_path_lookup (link_stub, &(state->loc));
+	} else if (state->loc2.parent == NULL) {
+		do_path_lookup (link_stub, &(state->loc2));
+	} else {
+		call_resume (link_stub);
+	}
+
+	return 0;
+}
+
+
+int32_t
+server_rename_resume (call_frame_t *frame,
+                      xlator_t *this,
+                      loc_t *oldloc,
+                      loc_t *newloc)
+{
+	server_state_t *state = NULL;
+
+	state = CALL_STATE(frame);
+
+	if (state->loc.parent == NULL)
+		state->loc.parent = inode_ref (oldloc->parent);
+
+	if (state->loc.inode == NULL) {
+		state->loc.inode = inode_ref (oldloc->inode);
+	}
+
+	if (state->loc2.parent == NULL)
+		state->loc2.parent = inode_ref (newloc->parent);
+
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": RENAME %s (%"PRId64"/%s) ==> %s (%"PRId64"/%s)", 
+		frame->root->unique, state->path, state->par, state->bname,
+		state->path2, state->par2, state->bname2);
+
+	STACK_WIND (frame,
+		    server_rename_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->rename,
+		    &(state->loc),
+		    &(state->loc2));
+	return 0;
+}
+
+/*
+ * server_rename - rename function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+int32_t
+server_rename (call_frame_t *frame,
+               xlator_t *bound_xl,
+               gf_hdr_common_t *hdr, size_t hdrlen,
+               char *buf, size_t buflen)
+{
+	gf_fop_rename_req_t *req = NULL;
+	server_state_t *state = NULL;
+	call_stub_t    *rename_stub = NULL;
+	int32_t ret = -1;
+	size_t  oldpathlen = 0;
+	size_t  oldbaselen = 0;
+	size_t  newpathlen = 0;
+	size_t  newbaselen = 0;
+
+	req = gf_param (hdr);
+
+	state = CALL_STATE(frame);
+	{
+		oldpathlen = STRLEN_0(req->oldpath);
+		oldbaselen = STRLEN_0(req->oldbname + oldpathlen);
+		newpathlen = STRLEN_0(req->newpath  + oldpathlen + oldbaselen);
+		newbaselen = STRLEN_0(req->newbname + oldpathlen + 
+				      oldbaselen + newpathlen);
+
+		state->path   = req->oldpath;
+		state->bname  = req->oldbname + oldpathlen;
+		state->path2  = req->newpath  + oldpathlen + oldbaselen;
+		state->bname2 = (req->newbname + oldpathlen + oldbaselen + 
+				 newpathlen);
+
+		state->par   = ntoh64 (req->oldpar);
+		state->par2  = ntoh64 (req->newpar);
+	}
+
+	ret = server_loc_fill (&(state->loc), state,
+			       0, state->par, state->bname,
+			       state->path);
+	ret = server_loc_fill (&(state->loc2), state,
+			       0, state->par2, state->bname2,
+			       state->path2);
+
+	rename_stub = fop_rename_stub (frame,
+				       server_rename_resume,
+				       &(state->loc),
+				       &(state->loc2));
+
+	if ((state->loc.parent == NULL) ||
+	    (state->loc.inode == NULL)){
+		do_path_lookup (rename_stub, &(state->loc));
+	} else if ((state->loc2.parent == NULL)){
+		do_path_lookup (rename_stub, &(state->loc2));
+	} else {
+		/* we have found inode for both oldpath and newpath in
+		 * inode cache. lets continue with fops->rename() */
+		call_resume (rename_stub);
+	}
+
+	return 0;
+}
+
+
+/*
+ * server_lk - lk function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ * not for external reference
+ */
+
+int32_t
+server_lk (call_frame_t *frame,
+           xlator_t *bound_xl,
+           gf_hdr_common_t *hdr, size_t hdrlen,
+           char *buf, size_t buflen)
+{
+	struct flock lock = {0, };
+	gf_fop_lk_req_t *req = NULL;
+	server_state_t *state = NULL;
+	server_connection_t *conn = NULL;
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+	{
+		state->fd_no = ntoh64 (req->fd);
+		if (state->fd_no >= 0)
+			state->fd = gf_fd_fdptr_get (conn->fdtable, 
+						     state->fd_no);
+
+		state->cmd =  ntoh32 (req->cmd);
+		state->type = ntoh32 (req->type);
+	}
+
+
+	if (state->fd == NULL) {
+		gf_log (frame->this->name, GF_LOG_ERROR,
+			"fd - %"PRId64": unresolved fd", 
+			state->fd_no);
+
+		server_lk_cbk (frame, NULL, frame->this,
+			       -1, EINVAL, NULL);
+
+		goto out;
+	}
+
+	switch (state->cmd) {
+	case GF_LK_GETLK:
+		state->cmd = F_GETLK;
+		break;
+	case GF_LK_SETLK:
+		state->cmd = F_SETLK;
+		break;
+	case GF_LK_SETLKW:
+		state->cmd = F_SETLKW;
+		break;
+	}
+
+	switch (state->type) {
+	case GF_LK_F_RDLCK:
+		lock.l_type = F_RDLCK;
+		break;
+	case GF_LK_F_WRLCK:
+		lock.l_type = F_WRLCK;
+		break;
+	case GF_LK_F_UNLCK:
+		lock.l_type = F_UNLCK;
+		break;
+	default:
+		gf_log (bound_xl->name, GF_LOG_ERROR, 
+			"fd - %"PRId64" (%"PRId64"): Unknown lock type: %"PRId32"!", 
+			state->fd_no, state->fd->inode->ino, state->type);
+		break;
+	}
+
+	gf_flock_to_flock (&req->flock, &lock);
+
+	gf_log (BOUND_XL(frame)->name, GF_LOG_DEBUG,
+		"%"PRId64": LK \'fd=%"PRId64" (%"PRId64")\'",
+		frame->root->unique, state->fd_no, state->fd->inode->ino);
+
+	STACK_WIND (frame, server_lk_cbk,
+		    BOUND_XL(frame), 
+		    BOUND_XL(frame)->fops->lk,
+		    state->fd, state->cmd, &lock);
+
+out:
+	return 0;
+}
+
+
+/*
+ * server_writedir -
+ *
+ * @frame:
+ * @bound_xl:
+ * @params:
+ *
+ */
+int32_t
+server_setdents (call_frame_t *frame,
+                 xlator_t *bound_xl,
+                 gf_hdr_common_t *hdr, size_t hdrlen,
+                 char *buf, size_t buflen)
+{
+	server_connection_t *conn = NULL;
+	gf_fop_setdents_req_t       *req   = NULL;
+	server_state_t              *state = NULL;
+	dir_entry_t *entry = NULL;
+	dir_entry_t *trav = NULL;
+	dir_entry_t *prev = NULL;
+	int32_t count = 0;
+	int32_t i = 0;
+	int32_t bread = 0;
+	char *ender = NULL;
+	char *buffer_ptr = NULL;
+	char tmp_buf[512] = {0,};
+	
+	conn = SERVER_CONNECTION(frame);
+
+	req   = gf_param (hdr);
+	state = CALL_STATE(frame);
+
+	state->fd_no = ntoh64 (req->fd);
+	if (state->fd_no >= 0)
+		state->fd = gf_fd_fdptr_get (conn->fdtable, 
+					     state->fd_no);
+	
+	state->nr_count = ntoh32 (req->count);
+
+	if (state->fd == NULL) {
+		gf_log (frame->this->name, GF_LOG_ERROR,
+			"fd - %"PRId64": unresolved fd", 
+			state->fd_no);
+
+		server_setdents_cbk (frame, NULL, frame->this,
+				     -1, EINVAL);
+
+		goto out;
+	}
+	
+	if (buf == NULL) {
+		gf_log (frame->this->name, GF_LOG_ERROR,
+			"fd - %"PRId64" (%"PRId64"): received a null buffer, "
+			"returning EINVAL",
+			state->fd_no, state->fd->inode->ino);
+
+		server_setdents_cbk (frame, NULL, frame->this,
+				     -1, EINVAL);
+
+		goto out;
+	}
+
+	entry = CALLOC (1, sizeof (dir_entry_t));
+	ERR_ABORT (entry);
+	prev = entry;
+	buffer_ptr = buf;
+
+	for (i = 0; i < state->nr_count ; i++) {
+		bread = 0;
+		trav = CALLOC (1, sizeof (dir_entry_t));
+		ERR_ABORT (trav);
+		
+		ender = strchr (buffer_ptr, '/');
+		if (!ender)
+			break;
+		count = ender - buffer_ptr;
+		trav->name = CALLOC (1, count + 2);
+		ERR_ABORT (trav->name);
+		
+		strncpy (trav->name, buffer_ptr, count);
+		bread = count + 1;
+		buffer_ptr += bread;
+		
+		ender = strchr (buffer_ptr, '\n');
+		if (!ender)
+			break;
+		count = ender - buffer_ptr;
+		strncpy (tmp_buf, buffer_ptr, count);
+		bread = count + 1;
+		buffer_ptr += bread;
+		
+		/* TODO: use str_to_stat instead */
+		{
+			uint64_t dev;
+			uint64_t ino;
+			uint32_t mode;
+			uint32_t nlink;
+			uint32_t uid;
+			uint32_t gid;
+			uint64_t rdev;
+			uint64_t size;
+			uint32_t blksize;
+			uint64_t blocks;
+			uint32_t atime;
+			uint32_t atime_nsec;
+			uint32_t mtime;
+			uint32_t mtime_nsec;
+			uint32_t ctime;
+			uint32_t ctime_nsec;
+			
+			sscanf (tmp_buf, GF_STAT_PRINT_FMT_STR,
+				&dev,
+				&ino,
+				&mode,
+				&nlink,
+				&uid,
+				&gid,
+				&rdev,
+				&size,
+				&blksize,
+				&blocks,
+				&atime,
+				&atime_nsec,
+				&mtime,
+				&mtime_nsec,
+				&ctime,
+				&ctime_nsec);
+			
+			trav->buf.st_dev = dev;
+			trav->buf.st_ino = ino;
+			trav->buf.st_mode = mode;
+			trav->buf.st_nlink = nlink;
+			trav->buf.st_uid = uid;
+			trav->buf.st_gid = gid;
+			trav->buf.st_rdev = rdev;
+			trav->buf.st_size = size;
+			trav->buf.st_blksize = blksize;
+			trav->buf.st_blocks = blocks;
+			
+			trav->buf.st_atime = atime;
+			trav->buf.st_mtime = mtime;
+			trav->buf.st_ctime = ctime;
+			
+			ST_ATIM_NSEC_SET(&trav->buf, atime_nsec);
+			ST_MTIM_NSEC_SET(&trav->buf, mtime_nsec);
+			ST_CTIM_NSEC_SET(&trav->buf, ctime_nsec);
+
+		}
+		
+		ender = strchr (buffer_ptr, '\n');
+		if (!ender)
+			break;
+		count = ender - buffer_ptr;
+		*ender = '\0';
+		if (S_ISLNK (trav->buf.st_mode)) {
+			trav->link = strdup (buffer_ptr);
+		} else
+			trav->link = "";
+		bread = count + 1;
+		buffer_ptr += bread;
+		
+		prev->next = trav;
+		prev = trav;
+	}
+
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": SETDENTS \'fd=%"PRId64" (%"PRId64"); count=%"PRId64,
+		frame->root->unique, state->fd_no, state->fd->inode->ino, 
+		(int64_t)state->nr_count);
+	
+	STACK_WIND (frame,
+		    server_setdents_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->setdents,
+		    state->fd,
+		    state->flags,
+		    entry,
+		    state->nr_count);
+	
+	
+	/* Free the variables allocated in this fop here */
+	trav = entry->next;
+	prev = entry;
+	while (trav) {
+		prev->next = trav->next;
+		FREE (trav->name);
+		if (S_ISLNK (trav->buf.st_mode))
+			FREE (trav->link);
+		FREE (trav);
+		trav = prev->next;
+	}
+	FREE (entry);
+
+out:
+	return 0;
+}
+
+
+
+/* xxx_MOPS */
+
+/* Management Calls */
+/*
+ * mop_getspec - getspec function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params:
+ *
+ */
+int32_t
+mop_getspec (call_frame_t *frame,
+             xlator_t *bound_xl,
+             gf_hdr_common_t *hdr, size_t hdrlen,
+             char *buf, size_t buflen)
+{
+	gf_hdr_common_t      *_hdr = NULL;
+	gf_mop_getspec_rsp_t *rsp = NULL;
+	int32_t ret = -1;
+	int32_t op_errno = ENOENT;
+	int32_t gf_errno = 0;
+	int32_t spec_fd = -1;
+	size_t  file_len = 0;
+	size_t _hdrlen = 0;
+	char  tmp_filename[ZR_FILENAME_MAX] = {0,};
+	char  data_key[256] = {0,};
+	char *filename = NULL;
+	struct stat stbuf = {0,};
+	peer_info_t *peerinfo = NULL;
+	transport_t *trans = NULL;
+
+	gf_mop_getspec_req_t *req = NULL;
+	uint32_t flags  = 0;
+	uint32_t keylen = 0;
+	char *key = NULL;
+
+	req   = gf_param (hdr);
+	flags = ntoh32 (req->flags);
+	keylen = ntoh32 (req->keylen);
+	if (keylen) {
+		key = req->key;
+	}
+
+	trans = TRANSPORT_FROM_FRAME(frame);
+
+	peerinfo = &(trans->peerinfo);
+	/* Inform users that this option is changed now */
+	ret = dict_get_str (frame->this->options, "client-volume-filename", 
+			    &filename);
+	if (ret == 0) {
+		gf_log (trans->xl->name, GF_LOG_WARNING,
+			"option 'client-volume-specfile' is changed to "
+			"'volume-filename.<key>' which now takes 'key' as an "
+			"option to choose/fetch different files from server. "
+			"Refer documentation or contact developers for more "
+			"info. Currently defaulting to given file '%s'", 
+			filename);
+	}
+	
+	if (key && !filename) {
+		sprintf (data_key, "volume-filename.%s", key);
+		ret = dict_get_str (frame->this->options, data_key, &filename);
+		if (ret < 0) {
+			gf_log (trans->xl->name, GF_LOG_ERROR,
+				"failed to get corresponding volume file "
+				"for the key '%s'. using default file %s", 
+				key, GLUSTERFSD_SPEC_PATH);
+		} 
+	}
+	if (!filename) {
+		filename = GLUSTERFSD_SPEC_PATH;
+		if (!key)
+			gf_log (trans->xl->name, GF_LOG_WARNING,
+				"using default volume file %s", 
+				GLUSTERFSD_SPEC_PATH);
+	}
+
+	{
+		sprintf (tmp_filename, "%s.%s", 
+			 filename, peerinfo->identifier);
+
+		/* Try for ip specific client volfile.
+		 * If not found, then go for, regular client file.
+		 */
+		ret = open (tmp_filename, O_RDONLY);
+		spec_fd = ret;
+		if (spec_fd < 0) {
+			gf_log (trans->xl->name, GF_LOG_DEBUG,
+				"Unable to open %s (%s)", 
+				tmp_filename, strerror (errno));
+			/* fall back */
+			ret = open (filename, O_RDONLY);
+			spec_fd = ret;
+			if (spec_fd < 0) {
+				gf_log (trans->xl->name, GF_LOG_ERROR,
+					"Unable to open %s (%s)", 
+					filename, strerror (errno));
+				goto fail;
+			}
+		} else {
+			/* Successful */
+			filename = tmp_filename;
+		}
+	}
+
+	/* to allocate the proper buffer to hold the file data */
+	{
+		ret = stat (filename, &stbuf);
+		if (ret < 0){
+			gf_log (trans->xl->name, GF_LOG_ERROR,
+				"Unable to stat %s (%s)", 
+				filename, strerror (errno));
+			goto fail;
+		}
+
+		file_len = stbuf.st_size;
+	}
+
+fail:
+	op_errno = errno;
+
+	_hdrlen = gf_hdr_len (rsp, file_len + 1);
+	_hdr    = gf_hdr_new (rsp, file_len + 1);
+	rsp     = gf_param (_hdr);
+
+	_hdr->rsp.op_ret = hton32 (ret);
+	gf_errno         = gf_errno_to_error (op_errno);
+	_hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (file_len) {
+		read (spec_fd, rsp->spec, file_len);
+		close (spec_fd);
+	}
+	protocol_server_reply (frame, GF_OP_TYPE_MOP_REPLY, GF_MOP_GETSPEC,
+			       _hdr, _hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+int32_t
+server_checksum_cbk (call_frame_t *frame,
+                     void *cookie,
+                     xlator_t *this,
+                     int32_t op_ret,
+                     int32_t op_errno,
+                     uint8_t *fchecksum,
+                     uint8_t *dchecksum)
+{
+	gf_hdr_common_t       *hdr = NULL;
+	gf_fop_checksum_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+
+	hdrlen = gf_hdr_len (rsp, ZR_FILENAME_MAX + 1 + ZR_FILENAME_MAX + 1);
+	hdr    = gf_hdr_new (rsp, ZR_FILENAME_MAX + 1 + ZR_FILENAME_MAX + 1);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	if (op_ret >= 0) {
+		memcpy (rsp->fchecksum, fchecksum, ZR_FILENAME_MAX);
+		rsp->fchecksum[ZR_FILENAME_MAX] =  '\0';
+		memcpy (rsp->dchecksum + ZR_FILENAME_MAX, 
+			dchecksum, ZR_FILENAME_MAX);
+		rsp->dchecksum[ZR_FILENAME_MAX + ZR_FILENAME_MAX] = '\0';
+	} 
+
+	protocol_server_reply (frame, GF_OP_TYPE_FOP_REPLY, GF_FOP_CHECKSUM,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+int32_t
+server_checksum (call_frame_t *frame,
+                 xlator_t *bound_xl,
+                 gf_hdr_common_t *hdr, size_t hdrlen,
+                 char *buf, size_t buflen)
+{
+	loc_t loc = {0,};
+	int32_t flag = 0;
+	gf_fop_checksum_req_t *req = NULL;
+
+	req = gf_param (hdr);
+
+	loc.path  = req->path;
+	loc.ino   = ntoh64 (req->ino);
+	loc.inode = NULL;
+	flag      = ntoh32 (req->flag);
+
+	gf_log (bound_xl->name, GF_LOG_DEBUG,
+		"%"PRId64": CHECKSUM \'%s (%"PRId64")\'", 
+		frame->root->unique, loc.path, loc.ino);
+
+	STACK_WIND (frame,
+		    server_checksum_cbk,
+		    BOUND_XL(frame),
+		    BOUND_XL(frame)->fops->checksum,
+		    &loc,
+		    flag);
+
+	return 0;
+}
+
+
+/*
+ * mop_unlock - unlock management function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ */
+int32_t
+mop_getvolume (call_frame_t *frame,
+               xlator_t *bound_xl,
+               gf_hdr_common_t *hdr, size_t hdrlen,
+               char *buf, size_t buflen)
+{
+	return 0;
+}
+
+struct __get_xl_struct {
+	const char *name;
+	xlator_t *reply;
+};
+
+void __check_and_set (xlator_t *each,
+                      void *data)
+{
+	if (!strcmp (each->name,
+		     ((struct __get_xl_struct *) data)->name))
+		((struct __get_xl_struct *) data)->reply = each;
+}
+
+static xlator_t *
+get_xlator_by_name (xlator_t *some_xl,
+                    const char *name)
+{
+	struct __get_xl_struct get = {
+		.name = name,
+		.reply = NULL
+	};
+
+	xlator_foreach (some_xl, __check_and_set, &get);
+
+	return get.reply;
+}
+
+
+/*
+ * mop_setvolume - setvolume management function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ */
+int
+mop_setvolume (call_frame_t *frame, xlator_t *bound_xl,
+               gf_hdr_common_t *req_hdr, size_t req_hdrlen,
+               char *req_buf, size_t req_buflen)
+{
+	server_connection_t *conn = NULL;
+	server_conf_t               *conf = NULL;
+	gf_hdr_common_t             *rsp_hdr = NULL;
+	gf_mop_setvolume_req_t      *req = NULL;
+	gf_mop_setvolume_rsp_t      *rsp = NULL;
+	peer_info_t                 *peerinfo = NULL;
+	int32_t                      ret = -1;
+	int32_t                      op_ret = -1;
+	int32_t                      op_errno = EINVAL;
+	int32_t                      gf_errno = 0;
+	dict_t                      *reply = NULL;
+	dict_t                      *config_params = NULL;
+	dict_t                      *params = NULL;
+	char                        *name = NULL;
+	char                        *version = NULL;
+	char                        *process_uuid = NULL;
+	xlator_t                    *xl = NULL;
+	transport_t                 *trans = NULL;
+	size_t                       rsp_hdrlen = -1;
+	size_t                       dict_len = -1;
+	size_t                       req_dictlen = -1;
+
+	params = dict_new ();
+	reply  = dict_new ();
+
+	req    = gf_param (req_hdr);
+	req_dictlen = ntoh32 (req->dict_len);
+	ret = dict_unserialize (req->buf, req_dictlen, &params);
+
+	config_params = dict_copy_with_ref (frame->this->options, NULL);
+	trans         = TRANSPORT_FROM_FRAME(frame);
+	conf          = SERVER_CONF(frame);
+
+	if (ret < 0) {
+		ret = dict_set_str (reply, "ERROR",
+				    "Internal error: failed to unserialize "
+				    "request dictionary");
+		if (ret < 0)
+			gf_log (bound_xl->name, GF_LOG_ERROR, 
+				"failed to set error msg \"%s\"",
+				"Internal error: failed to unserialize "
+				"request dictionary");
+
+		op_ret = -1;
+		op_errno = EINVAL;
+		goto fail;
+	}
+
+	ret = dict_get_str (params, "process-uuid", &process_uuid);
+	if (ret < 0) {
+		ret = dict_set_str (reply, "ERROR",
+				    "UUID not specified");
+		if (ret < 0)
+			gf_log (bound_xl->name, GF_LOG_ERROR, 
+				"failed to set error msg");
+
+		op_ret = -1;
+		op_errno = EINVAL;
+		goto fail;
+	}
+	
+
+	conn = server_connection_get (frame->this, process_uuid);
+	if (trans->xl_private != conn)
+		trans->xl_private = conn;
+
+	ret = dict_get_str (params, "version", &version);
+	if (ret < 0) {
+		ret = dict_set_str (reply, "ERROR",
+				    "No version number specified");
+		if (ret < 0)
+			gf_log (trans->xl->name, GF_LOG_ERROR, 
+				"failed to set error msg");
+
+		op_ret = -1;
+		op_errno = EINVAL;
+		goto fail;
+	}
+	
+	ret = strcmp (version, PACKAGE_VERSION);
+	if (ret != 0) {
+		char *msg = NULL;
+		asprintf (&msg,
+			  "Version mismatch: client(%s) Vs server (%s)",
+			  version, PACKAGE_VERSION);
+		ret = dict_set_dynstr (reply, "ERROR", msg);
+		if (ret < 0)
+			gf_log (trans->xl->name, GF_LOG_ERROR, 
+				"failed to set error msg");
+
+		op_ret = -1;
+		op_errno = EINVAL;
+		goto fail;
+	}
+
+
+	ret = dict_get_str (params,
+			    "remote-subvolume", &name);
+	if (ret < 0) {
+		ret = dict_set_str (reply, "ERROR",
+				    "No remote-subvolume option specified");
+		if (ret < 0)
+			gf_log (trans->xl->name, GF_LOG_ERROR, 
+				"failed to set error msg");
+
+		op_ret = -1;
+		op_errno = EINVAL;
+		goto fail;
+	}
+
+	xl = get_xlator_by_name (frame->this, name);
+	if (xl == NULL) {
+		char *msg = NULL;
+		asprintf (&msg, "remote-subvolume \"%s\" is not found", name);
+		ret = dict_set_dynstr (reply, "ERROR", msg);
+		if (ret < 0)
+			gf_log (trans->xl->name, GF_LOG_ERROR, 
+				"failed to set error msg");
+
+		op_ret = -1;
+		op_errno = ENOENT;
+		goto fail;
+	}
+
+	peerinfo = &trans->peerinfo;
+	ret = dict_set_static_ptr (params, "peer-info", peerinfo);
+	if (ret < 0)
+		gf_log (trans->xl->name, GF_LOG_ERROR, 
+			"failed to set peer-info");
+
+	if (conf->auth_modules == NULL) {
+		gf_log (trans->xl->name, GF_LOG_ERROR,
+			"Authentication module not initialized");
+	}
+
+	ret = gf_authenticate (params, config_params, 
+			       conf->auth_modules);
+	if (ret == AUTH_ACCEPT) {
+		gf_log (trans->xl->name, GF_LOG_INFO,
+			"accepted client from %s",
+			peerinfo->identifier);
+		op_ret = 0;
+		conn->bound_xl = xl;
+		ret = dict_set_str (reply, "ERROR", "Success");
+		if (ret < 0)
+			gf_log (trans->xl->name, GF_LOG_ERROR, 
+				"failed to set error msg");
+	} else {
+		gf_log (trans->xl->name, GF_LOG_ERROR,
+			"Cannot authenticate client from %s",
+			peerinfo->identifier);
+		op_ret = -1;
+		op_errno = EACCES;
+		ret = dict_set_str (reply, "ERROR", "Authentication failed");
+		if (ret < 0)
+			gf_log (bound_xl->name, GF_LOG_ERROR, 
+				"failed to set error msg");
+
+		goto fail;
+	}
+
+	if (conn->bound_xl == NULL) {
+		ret = dict_set_str (reply, "ERROR",
+				    "Check volfile and handshake "
+				    "options in protocol/client");
+		if (ret < 0)
+			gf_log (trans->xl->name, GF_LOG_ERROR, 
+				"failed to set error msg");
+
+		op_ret = -1;
+		op_errno = EACCES;
+		goto fail;
+	}
+
+	if ((conn->bound_xl != NULL) &&
+	    (ret >= 0)                   &&
+	    (conn->bound_xl->itable == NULL)) {
+		/* create inode table for this bound_xl, if one doesn't 
+		   already exist */
+		int32_t lru_limit = 1024;
+
+		lru_limit = INODE_LRU_LIMIT (frame->this);
+
+		gf_log (trans->xl->name, GF_LOG_DEBUG,
+			"creating inode table with lru_limit=%"PRId32", "
+			"xlator=%s", lru_limit, conn->bound_xl->name);
+
+		conn->bound_xl->itable = 
+			inode_table_new (lru_limit,
+					 conn->bound_xl);
+	}
+
+	ret = dict_set_str (reply, "process-uuid", 
+			    xl->ctx->process_uuid);
+
+fail:
+	dict_len = dict_serialized_length (reply);
+	if (dict_len < 0) {
+		gf_log (xl->name, GF_LOG_ERROR,
+			"failed to get serialized length of reply dict");
+		op_ret   = -1;
+		op_errno = EINVAL;
+		dict_len = 0;
+	}
+
+	rsp_hdr    = gf_hdr_new (rsp, dict_len);
+	rsp_hdrlen = gf_hdr_len (rsp, dict_len);
+	rsp = gf_param (rsp_hdr);
+
+	if (dict_len) {
+		ret = dict_serialize (reply, rsp->buf);
+		if (ret < 0) {
+			gf_log (xl->name, GF_LOG_ERROR,
+				"failed to serialize reply dict");
+			op_ret = -1;
+			op_errno = -ret;
+		}
+	}
+	rsp->dict_len = hton32 (dict_len);
+
+	rsp_hdr->rsp.op_ret = hton32 (op_ret);
+	gf_errno = gf_errno_to_error (op_errno);
+	rsp_hdr->rsp.op_errno = hton32 (gf_errno);
+
+	protocol_server_reply (frame, GF_OP_TYPE_MOP_REPLY, GF_MOP_SETVOLUME,
+			       rsp_hdr, rsp_hdrlen, NULL, 0, NULL);
+
+	dict_unref (params);
+	dict_unref (reply);
+	dict_unref (config_params);
+
+	return 0;
+}
+
+/*
+ * server_mop_stats_cbk - stats callback for server management operation
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ * @stats:err
+ *
+ * not for external reference
+ */
+
+int32_t
+server_mop_stats_cbk (call_frame_t *frame,
+                      void *cookie,
+                      xlator_t *xl,
+                      int32_t ret,
+                      int32_t op_errno,
+                      struct xlator_stats *stats)
+{
+	/* TODO: get this information from somewhere else, not extern */
+	gf_hdr_common_t    *hdr = NULL;
+	gf_mop_stats_rsp_t *rsp = NULL;
+	char buffer[256] = {0,};
+	int64_t glusterfsd_stats_nr_clients = 0;
+	size_t  hdrlen = 0;
+	size_t  buf_len = 0;
+	int32_t gf_errno = 0;
+
+	if (ret >= 0) {
+		sprintf (buffer,
+			 "%"PRIx64",%"PRIx64",%"PRIx64
+			 ",%"PRIx64",%"PRIx64",%"PRIx64
+			 ",%"PRIx64",%"PRIx64"\n",
+			 stats->nr_files,
+			 stats->disk_usage,
+			 stats->free_disk,
+			 stats->total_disk_size,
+			 stats->read_usage,
+			 stats->write_usage,
+			 stats->disk_speed,
+			 glusterfsd_stats_nr_clients);
+
+		buf_len = strlen (buffer);
+	}
+
+	hdrlen = gf_hdr_len (rsp, buf_len + 1);
+	hdr    = gf_hdr_new (rsp, buf_len + 1);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (ret);
+	gf_errno        = gf_errno_to_error (op_errno);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	strcpy (rsp->buf, buffer);
+
+	protocol_server_reply (frame, GF_OP_TYPE_MOP_REPLY, GF_MOP_STATS,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+
+/*
+ * mop_unlock - unlock management function for server protocol
+ * @frame: call frame
+ * @bound_xl:
+ * @params: parameter dictionary
+ *
+ */
+static int32_t
+mop_stats (call_frame_t *frame,
+           xlator_t *bound_xl,
+           gf_hdr_common_t *hdr, size_t hdrlen,
+           char *buf, size_t buflen)
+{
+	int32_t flag = 0;
+	gf_mop_stats_req_t *req = NULL;
+
+	req = gf_param (hdr);
+
+	flag = ntoh32 (req->flags);
+
+	STACK_WIND (frame,
+		    server_mop_stats_cbk,
+		    bound_xl,
+		    bound_xl->mops->stats,
+		    flag);
+
+	return 0;
+}
+
+int32_t
+mop_ping (call_frame_t *frame,
+           xlator_t *bound_xl,
+           gf_hdr_common_t *hdr, size_t hdrlen,
+           char *buf, size_t buflen)
+{
+	gf_hdr_common_t     *rsp_hdr = NULL;
+	gf_mop_ping_rsp_t   *rsp = NULL;
+	size_t  rsp_hdrlen = 0;
+
+	rsp_hdrlen = gf_hdr_len (rsp, 0);
+	rsp_hdr    = gf_hdr_new (rsp, 0);
+
+	hdr->rsp.op_ret = 0;
+
+	protocol_server_reply (frame, GF_OP_TYPE_MOP_REPLY, GF_MOP_PING,
+			       rsp_hdr, rsp_hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+/*
+ * unknown_op_cbk - This function is called when a opcode for unknown 
+ *                  type is called. Helps to keep the backward/forward
+ *                  compatiblity
+ * @frame: call frame
+ * @type:
+ * @opcode:
+ *
+ */
+
+int32_t
+unknown_op_cbk (call_frame_t *frame,
+                int32_t type,
+                int32_t opcode)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_flush_rsp_t *rsp = NULL;
+	size_t  hdrlen = 0;
+	int32_t gf_errno = 0;
+	hdrlen = gf_hdr_len (rsp, 0);
+	hdr    = gf_hdr_new (rsp, 0);
+	rsp    = gf_param (hdr);
+
+	hdr->rsp.op_ret = hton32 (-1);
+	gf_errno        = gf_errno_to_error (ENOSYS);
+	hdr->rsp.op_errno = hton32 (gf_errno);
+
+	protocol_server_reply (frame, type, opcode,
+			       hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+}
+
+/*
+ * get_frame_for_transport - get call frame for specified transport object
+ *
+ * @trans: transport object
+ *
+ */
+static call_frame_t *
+get_frame_for_transport (transport_t *trans)
+{
+	call_frame_t         *frame = NULL;
+	call_pool_t          *pool = NULL;
+	server_connection_t  *conn = NULL;
+	server_state_t       *state = NULL;;
+	
+	GF_VALIDATE_OR_GOTO("server", trans, out);
+
+	if (trans->xl && trans->xl->ctx)
+		pool = trans->xl->ctx->pool;
+	GF_VALIDATE_OR_GOTO("server", pool, out);
+
+	frame = create_frame (trans->xl, pool);
+	GF_VALIDATE_OR_GOTO("server", frame, out);
+
+	state = CALLOC (1, sizeof (*state));
+	GF_VALIDATE_OR_GOTO("server", state, out);
+
+	conn = trans->xl_private;
+	if (conn) {
+		if (conn->bound_xl)
+			state->itable = conn->bound_xl->itable;
+		state->bound_xl = conn->bound_xl;
+	}
+
+	state->trans = transport_ref (trans);
+
+	frame->root->trans = conn;
+	frame->root->state = state;        /* which socket */
+	frame->root->unique = 0;           /* which call */
+
+out:
+	return frame;
+}
+
+/*
+ * get_frame_for_call - create a frame into the capable of
+ *                      generating and replying the reply packet by itself.
+ *                      By making a call with this frame, the last UNWIND
+ *                      function will have all needed state from its
+ *                      frame_t->root to send reply.
+ * @trans:
+ * @blk:
+ * @params:
+ *
+ * not for external reference
+ */
+static call_frame_t *
+get_frame_for_call (transport_t *trans, gf_hdr_common_t *hdr)
+{
+	call_frame_t *frame = NULL;
+
+	frame = get_frame_for_transport (trans);
+
+	frame->root->op   = ntoh32 (hdr->op);
+	frame->root->type = ntoh32 (hdr->type);
+
+	frame->root->uid         = ntoh32 (hdr->req.uid);
+	frame->root->unique      = ntoh64 (hdr->callid);      /* which call */
+	frame->root->gid         = ntoh32 (hdr->req.gid);
+	frame->root->pid         = ntoh32 (hdr->req.pid);
+
+	return frame;
+}
+
+/*
+ * prototype of operations function for each of mop and
+ * fop at server protocol level
+ *
+ * @frame: call frame pointer
+ * @bound_xl: the xlator that this frame is bound to
+ * @params: parameters dictionary
+ *
+ * to be used by protocol interpret, _not_ for exterenal reference
+ */
+typedef int32_t (*gf_op_t) (call_frame_t *frame, xlator_t *bould_xl,
+                            gf_hdr_common_t *hdr, size_t hdrlen,
+                            char *buf, size_t buflen);
+
+
+static gf_op_t gf_fops[] = {
+	[GF_FOP_STAT]         =  server_stat,
+	[GF_FOP_READLINK]     =  server_readlink,
+	[GF_FOP_MKNOD]        =  server_mknod,
+	[GF_FOP_MKDIR]        =  server_mkdir,
+	[GF_FOP_UNLINK]       =  server_unlink,
+	[GF_FOP_RMDIR]        =  server_rmdir,
+	[GF_FOP_SYMLINK]      =  server_symlink,
+	[GF_FOP_RENAME]       =  server_rename,
+	[GF_FOP_LINK]         =  server_link,
+	[GF_FOP_CHMOD]        =  server_chmod,
+	[GF_FOP_CHOWN]        =  server_chown,
+	[GF_FOP_TRUNCATE]     =  server_truncate,
+	[GF_FOP_OPEN]         =  server_open,
+	[GF_FOP_READ]         =  server_readv,
+	[GF_FOP_WRITE]        =  server_writev,
+	[GF_FOP_STATFS]       =  server_statfs,
+	[GF_FOP_FLUSH]        =  server_flush,
+	[GF_FOP_FSYNC]        =  server_fsync,
+	[GF_FOP_SETXATTR]     =  server_setxattr,
+	[GF_FOP_GETXATTR]     =  server_getxattr,
+	[GF_FOP_REMOVEXATTR]  =  server_removexattr,
+	[GF_FOP_OPENDIR]      =  server_opendir,
+	[GF_FOP_GETDENTS]     =  server_getdents,
+	[GF_FOP_FSYNCDIR]     =  server_fsyncdir,
+	[GF_FOP_ACCESS]       =  server_access,
+	[GF_FOP_CREATE]       =  server_create,
+	[GF_FOP_FTRUNCATE]    =  server_ftruncate,
+	[GF_FOP_FSTAT]        =  server_fstat,
+	[GF_FOP_LK]           =  server_lk,
+	[GF_FOP_UTIMENS]      =  server_utimens,
+	[GF_FOP_FCHMOD]       =  server_fchmod,
+	[GF_FOP_FCHOWN]       =  server_fchown,
+	[GF_FOP_LOOKUP]       =  server_lookup,
+	[GF_FOP_SETDENTS]     =  server_setdents,
+	[GF_FOP_READDIR]      =  server_readdir,
+	[GF_FOP_INODELK]      =  server_inodelk,
+	[GF_FOP_FINODELK]     =  server_finodelk,
+	[GF_FOP_ENTRYLK]      =  server_entrylk,
+	[GF_FOP_FENTRYLK]     =  server_fentrylk,
+	[GF_FOP_CHECKSUM]     =  server_checksum,
+	[GF_FOP_XATTROP]      =  server_xattrop,
+	[GF_FOP_FXATTROP]     =  server_fxattrop,
+};
+
+
+
+static gf_op_t gf_mops[] = {
+	[GF_MOP_SETVOLUME] = mop_setvolume,
+	[GF_MOP_GETVOLUME] = mop_getvolume,
+	[GF_MOP_STATS]     = mop_stats,
+	[GF_MOP_GETSPEC]   = mop_getspec,
+	[GF_MOP_PING]      = mop_ping,
+};
+
+static gf_op_t gf_cbks[] = {
+	[GF_CBK_FORGET]     = server_forget,
+	[GF_CBK_RELEASE]    = server_release,
+	[GF_CBK_RELEASEDIR] = server_releasedir
+};
+
+int
+protocol_server_interpret (xlator_t *this, transport_t *trans,
+                           char *hdr_p, size_t hdrlen, char *buf, 
+			   size_t buflen)
+{
+	server_connection_t *conn = NULL;
+	gf_hdr_common_t             *hdr = NULL;
+	xlator_t                    *bound_xl = NULL;
+	call_frame_t                *frame = NULL;
+	peer_info_t                 *peerinfo = NULL;
+	int32_t                      type = -1;
+	int32_t                      op = -1;
+	int32_t                      ret = -1;
+
+	hdr  = (gf_hdr_common_t *)hdr_p;
+	type = ntoh32 (hdr->type);
+	op   = ntoh32 (hdr->op);
+
+	conn = trans->xl_private;
+	if (conn)
+		bound_xl = conn->bound_xl;
+
+	peerinfo = &trans->peerinfo;
+	switch (type) {
+	case GF_OP_TYPE_FOP_REQUEST:
+		if ((op < 0) || 
+		    (op > GF_FOP_MAXVALUE)) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"invalid fop %"PRId32" from client %s",
+				op, peerinfo->identifier);
+			break;
+		}
+		if (bound_xl == NULL) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"Received fop %"PRId32" before "
+				"authentication.", op);
+			break;
+		}
+		frame = get_frame_for_call (trans, hdr);
+		ret = gf_fops[op] (frame, bound_xl, hdr, hdrlen, buf, buflen);
+		break;
+
+	case GF_OP_TYPE_MOP_REQUEST:
+		if (op < 0 || op > GF_MOP_MAXVALUE) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"invalid mop %"PRId32" from client %s",
+				op, peerinfo->identifier);
+			break;
+		}
+		frame = get_frame_for_call (trans, hdr);
+		ret = gf_mops[op] (frame, bound_xl, hdr, hdrlen, buf, buflen);
+		break;
+
+	case GF_OP_TYPE_CBK_REQUEST:
+		if (op < 0 || op > GF_CBK_MAXVALUE) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"invalid cbk %"PRId32" from client %s",
+				op, peerinfo->identifier);
+			break;
+		}
+		if (bound_xl == NULL) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"Received cbk %d before authentication.", op);
+			break;
+		}
+
+		frame = get_frame_for_call (trans, hdr);
+		ret = gf_cbks[op] (frame, bound_xl, hdr, hdrlen, buf, buflen);
+		break;
+
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+
+/*
+ * server_nop_cbk - nop callback for server protocol
+ * @frame: call frame
+ * @cookie:
+ * @this:
+ * @op_ret: return value
+ * @op_errno: errno
+ *
+ * not for external reference
+ */
+int
+server_nop_cbk (call_frame_t *frame, void *cookie,
+                xlator_t *this, int32_t op_ret, int32_t op_errno)
+{
+	server_state_t *state = NULL;
+	
+	state = CALL_STATE(frame);
+
+	if (state)
+		free_state (state);
+	STACK_DESTROY (frame->root);
+	return 0;
+}
+
+
+static void
+get_auth_types (dict_t *this,
+                char *key,
+                data_t *value,
+                void *data)
+{
+	dict_t *auth_dict = data;
+	char *saveptr = NULL, *tmp = NULL;
+	char *key_cpy = NULL;
+	int32_t ret = -1;
+	
+	key_cpy = strdup (key);
+	GF_VALIDATE_OR_GOTO("server", key_cpy, out);
+
+	tmp = strtok_r (key_cpy, ".", &saveptr);
+	ret = strcmp (tmp, "auth");
+	if (ret == 0) {
+		tmp = strtok_r (NULL, ".", &saveptr);
+		if (strcmp (tmp, "ip") == 0) {
+			/* TODO: backward compatibility, remove when 
+			   newer versions are available */
+			tmp = "addr";
+			gf_log ("server", GF_LOG_WARNING, 
+				"assuming 'auth.ip' to be 'auth.addr'");
+		}
+		ret = dict_set_dynptr (auth_dict, tmp, NULL, 0);
+		if (ret < 0) {
+			gf_log ("server", GF_LOG_ERROR,
+				"failed to dict_set_dynptr");
+		} 
+	}
+
+	FREE (key_cpy);
+out:
+	return;
+}
+
+
+static int
+validate_auth_options (xlator_t *this, dict_t *dict)
+{
+	int ret = -1;
+	int error = 0;
+	xlator_list_t *trav = NULL;
+	data_pair_t *pair = NULL;
+	char *saveptr = NULL, *tmp = NULL;
+	char *key_cpy = NULL;
+	
+	trav = this->children;
+	while (trav) {
+		error = -1;
+		for (pair = dict->members_list; pair; pair = pair->next) {
+			key_cpy = strdup (pair->key);
+			tmp = strtok_r (key_cpy, ".", &saveptr);
+			ret = strcmp (tmp, "auth");
+			if (ret == 0) {
+				/* for module type */
+				tmp = strtok_r (NULL, ".", &saveptr); 
+				/* for volume name */
+				tmp = strtok_r (NULL, ".", &saveptr); 
+			}
+
+			if (strcmp (tmp, trav->xlator->name) == 0) {
+				error = 0;
+				free (key_cpy);
+				break;
+			}
+			free (key_cpy);
+		}
+		if (-1 == error) {
+			gf_log (this->name, GF_LOG_ERROR, 
+				"volume '%s' defined as subvolume, but no "
+				"authentication defined for the same",
+				trav->xlator->name);
+			break;
+		}
+		trav = trav->next;
+	}
+
+	return error;
+}
+
+
+/*
+ * init - called during server protocol initialization
+ *
+ * @this:
+ *
+ */
+int
+init (xlator_t *this)
+{
+	int32_t ret = -1;
+	transport_t *trans = NULL;
+	server_conf_t *conf = NULL;
+
+	if (this->children == NULL) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"protocol/server should have subvolume");
+		goto out;
+	}
+
+	trans = transport_load (this->options, this);
+	if (trans == NULL) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"failed to load transport");
+		goto out;
+	}
+
+	ret = transport_listen (trans);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"failed to bind/listen on socket");
+		goto out;
+	}
+
+	conf = CALLOC (1, sizeof (server_conf_t));
+	GF_VALIDATE_OR_GOTO(this->name, conf, out);
+
+	INIT_LIST_HEAD (&conf->conns);
+	pthread_mutex_init (&conf->mutex, NULL);
+
+	conf->trans = trans;
+
+	conf->auth_modules = dict_new ();
+	GF_VALIDATE_OR_GOTO(this->name, conf->auth_modules, out);
+
+	dict_foreach (this->options, get_auth_types, 
+		      conf->auth_modules);
+	ret = validate_auth_options (this, this->options);
+	if (ret == -1) {
+		/* logging already done in validate_auth_options function. */
+		goto out;
+	}
+	
+	ret = gf_auth_init (this, conf->auth_modules);
+	if (ret) {
+		dict_unref (conf->auth_modules);
+		goto out;
+	}
+
+	this->private = conf;
+
+	ret = dict_get_int32 (this->options, "inode-lru-limit", 
+			      &conf->inode_lru_limit);
+	if (ret < 0) {
+		conf->inode_lru_limit = 1024;
+	}
+
+	ret = dict_get_int32 (this->options, "limits.transaction-size", 
+			      &conf->max_block_size);
+	if (ret < 0) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"defaulting limits.transaction-size to %d",
+			DEFAULT_BLOCK_SIZE);
+		conf->max_block_size = DEFAULT_BLOCK_SIZE;
+	}
+
+#ifndef GF_DARWIN_HOST_OS
+	{
+		struct rlimit lim;
+
+		lim.rlim_cur = 1048576;
+		lim.rlim_max = 1048576;
+
+		if (setrlimit (RLIMIT_NOFILE, &lim) == -1) {
+			gf_log (this->name, GF_LOG_WARNING,
+				"WARNING: Failed to set 'ulimit -n 1M': %s",
+				strerror(errno));
+			lim.rlim_cur = 65536;
+			lim.rlim_max = 65536;
+
+			if (setrlimit (RLIMIT_NOFILE, &lim) == -1) {
+				gf_log (this->name, GF_LOG_ERROR,
+					"Failed to set max open fd to 64k: %s",
+					strerror(errno));
+			} else {
+				gf_log (this->name, GF_LOG_ERROR,
+					"max open fd set to 64k");
+			}
+		}
+	}
+#endif
+	this->ctx->top = this;
+
+	ret = 0;
+out:
+	return ret;
+}
+
+
+
+int
+protocol_server_pollin (xlator_t *this, transport_t *trans)
+{
+	char                *hdr = NULL;
+	size_t               hdrlen = 0;
+	char                *buf = NULL;
+	size_t               buflen = 0;
+	int                  ret = -1;
+
+
+	ret = transport_receive (trans, &hdr, &hdrlen, &buf, &buflen);
+
+	if (ret == 0)
+		ret = protocol_server_interpret (this, trans, hdr, 
+						 hdrlen, buf, buflen);
+
+	/* TODO: use mem-pool */
+	FREE (hdr);
+
+	return ret;
+}
+
+
+/*
+ * fini - finish function for server protocol, called before
+ *        unloading server protocol.
+ *
+ * @this:
+ *
+ */
+void
+fini (xlator_t *this)
+{
+	server_conf_t *conf = this->private;
+	
+	GF_VALIDATE_OR_GOTO(this->name, conf, out);
+
+	if (conf->auth_modules) {
+		dict_unref (conf->auth_modules);
+	}
+
+	FREE (conf);
+	this->private = NULL;
+out:
+	return;
+}
+
+/*
+ * server_protocol_notify - notify function for server protocol
+ * @this:
+ * @trans:
+ * @event:
+ *
+ */
+int
+notify (xlator_t *this, int32_t event, void *data, ...)
+{
+	int          ret = 0;
+	transport_t *trans = data;
+
+	switch (event) {
+	case GF_EVENT_POLLIN:
+		ret = protocol_server_pollin (this, trans);
+		break;
+	case GF_EVENT_POLLERR:
+	{
+		peer_info_t *peerinfo = NULL;
+
+		peerinfo = &(trans->peerinfo);
+		gf_log (trans->xl->name, GF_LOG_INFO, "%s disconnected",
+			peerinfo->identifier);
+
+		ret = -1;
+		transport_disconnect (trans);
+	}
+	break;
+
+	case GF_EVENT_TRANSPORT_CLEANUP:
+	{
+		if (trans->xl_private)
+			server_connection_put (this, trans->xl_private);
+	}
+	break;
+
+	default:
+		default_notify (this, event, data);
+		break;
+	}
+
+	return ret;
+}
+
+
+struct xlator_mops mops = {
+};
+
+struct xlator_fops fops = {
+};
+
+struct xlator_cbks cbks = {
+};
+
+struct volume_options options[] = {
+ 	{ .key   = {"transport-type"}, 
+	  .value = {"tcp", "socket", "ib-verbs", "unix", "ib-sdp", 
+		    "tcp/server", "ib-verbs/server"},
+	  .type  = GF_OPTION_TYPE_STR 
+	},
+	{ .key   = {"volume-filename.*"}, 
+	  .type  = GF_OPTION_TYPE_PATH, 
+	},
+	{ .key   = {"inode-lru-limit"},  
+	  .type  = GF_OPTION_TYPE_INT,
+	  .min   = 0, 
+	  .max   = (1 * GF_UNIT_MB)
+	},
+	{ .key   = {"client-volume-filename"}, 
+	  .type  = GF_OPTION_TYPE_PATH
+	}, 
+	{ .key   = {NULL} },
+};
diff --git a/xlators/protocol/server/src/server-protocol.h b/xlators/protocol/server/src/server-protocol.h
new file mode 100644
index 00000000000..cc5f6f9512c
--- /dev/null
+++ b/xlators/protocol/server/src/server-protocol.h
@@ -0,0 +1,143 @@
+/*
+  Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _SERVER_PROTOCOL_H_
+#define _SERVER_PROTOCOL_H_
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include <pthread.h>
+
+#include "glusterfs.h"
+#include "xlator.h"
+#include "logging.h"
+#include "call-stub.h"
+#include "authenticate.h"
+#include "fd.h"
+#include "byte-order.h"
+
+#define DEFAULT_BLOCK_SIZE     4194304   /* 4MB */
+#define GLUSTERFSD_SPEC_PATH   CONFDIR "/glusterfs-client.vol"
+
+typedef struct _server_state server_state_t;
+
+struct _locker {
+	struct list_head  lockers;
+	loc_t             loc;
+	fd_t             *fd;
+	pid_t             pid;
+};
+
+struct _lock_table {
+	struct list_head  file_lockers;
+	struct list_head  dir_lockers;
+	gf_lock_t         lock;
+	size_t            count;
+};
+
+
+/* private structure per connection (transport object)
+ * used as transport_t->xl_private
+ */
+struct _server_connection {
+	struct list_head    list;
+	char               *id;
+	int                 ref;
+	pthread_mutex_t     lock;
+	char                disconnected;
+	fdtable_t          *fdtable; 
+	struct _lock_table *ltable;
+	xlator_t           *bound_xl;
+};
+
+typedef struct _server_connection server_connection_t;
+
+
+server_connection_t *
+server_connection_get (xlator_t *this, const char *id);
+
+void
+server_connection_put (xlator_t *this, server_connection_t *conn);
+
+int
+server_connection_destroy (xlator_t *this, server_connection_t *conn);
+
+int
+server_nop_cbk (call_frame_t *frame, void *cookie,
+		xlator_t *this, int32_t op_ret, int32_t op_errno);
+
+
+typedef struct {
+	dict_t           *auth_modules;
+	transport_t      *trans;
+	int32_t           max_block_size;
+	int32_t           inode_lru_limit;
+	pthread_mutex_t   mutex;
+	struct list_head  conns;
+} server_conf_t;
+
+
+struct _server_state {
+	transport_t      *trans;
+	xlator_t         *bound_xl;
+	loc_t             loc;
+	loc_t             loc2;
+	int               flags;
+	fd_t             *fd;
+	size_t            size;
+	off_t             offset;
+	mode_t            mode;
+	dev_t             dev;
+	uid_t             uid;
+	gid_t             gid;
+	size_t            nr_count;
+	int               cmd;
+	int               type;
+	char             *name;
+	int               name_len;
+	inode_table_t    *itable;
+	int64_t           fd_no;
+	ino_t             ino;
+	ino_t             par;
+	ino_t             ino2;
+	ino_t             par2;
+	char             *path;
+	char             *path2;
+	char             *bname;
+	char             *bname2;
+	int               mask;
+	char              is_revalidate;
+	dict_t           *xattr_req;
+	struct flock      flock;
+	struct timespec   tv[2];
+	char             *resolved;
+};
+
+
+int
+server_stub_resume (call_stub_t *stub, int32_t op_ret, int32_t op_errno,
+		    inode_t *inode, inode_t *parent);
+
+int
+do_path_lookup (call_stub_t *stub, const loc_t *loc);
+
+#endif