Added all files

1 files changed, 6671 insertions, 0 deletions

diff --git a/xlators/protocol/client/src/client-protocol.c b/xlators/protocol/client/src/client-protocol.c
new file mode 100644
index 00000000000..5c93bd6f135
--- /dev/null
+++ b/xlators/protocol/client/src/client-protocol.c
@@ -0,0 +1,6671 @@
+/*
+  Copyright (c) 2006, 2007, 2008, 2009 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 <inttypes.h>
+
+
+#include "glusterfs.h"
+#include "client-protocol.h"
+#include "compat.h"
+#include "dict.h"
+#include "protocol.h"
+#include "transport.h"
+#include "xlator.h"
+#include "logging.h"
+#include "timer.h"
+#include "defaults.h"
+#include "compat.h"
+#include "compat-errno.h"
+
+#include <sys/resource.h>
+#include <inttypes.h>
+
+/* for default_*_cbk functions */
+#include "defaults.c"
+#include "saved-frames.h"
+
+
+int protocol_client_cleanup (transport_t *trans);
+int protocol_client_interpret (xlator_t *this, transport_t *trans,
+                               char *hdr_p, size_t hdrlen,
+                               char *buf_p, size_t buflen);
+int
+protocol_client_xfer (call_frame_t *frame, xlator_t *this, transport_t *trans,
+                      int type, int op,
+                      gf_hdr_common_t *hdr, size_t hdrlen,
+                      struct iovec *vector, int count,
+                      dict_t *refs);
+
+static gf_op_t gf_fops[];
+static gf_op_t gf_mops[];
+static gf_op_t gf_cbks[];
+
+
+static ino_t
+this_ino_get_from_inode (inode_t *inode, xlator_t *this)
+{
+	ino_t   ino = 0;
+	int32_t ret = 0;
+
+	GF_VALIDATE_OR_GOTO ("client", this, out);
+	GF_VALIDATE_OR_GOTO (this->name, inode, out);
+
+	if (inode->ino == 1) {
+		ino = 1;
+		goto out;
+	}
+
+	ret = inode_ctx_get (inode, this, &ino);
+
+	if (inode->ino && ret < 0) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"(%"PRId64"): failed to get remote inode number",
+			inode->ino);
+	}
+
+out:
+	return ino;
+}
+
+
+static ino_t
+this_ino_get (loc_t *loc, xlator_t *this, int32_t which)
+{
+	ino_t    ino = 0;
+	int32_t  ret = 0;
+	inode_t *inode = NULL;
+
+	GF_VALIDATE_OR_GOTO ("client", this, out);
+	
+	if (which == GF_CLIENT_INODE_SELF) {
+		inode = loc->inode;
+	} else if (which == GF_CLIENT_INODE_PARENT) {
+		inode = loc->parent;
+	}
+	GF_VALIDATE_OR_GOTO (this->name, inode, out);
+
+	if (inode->ino == 1) {
+		ino = 1;
+		goto out;
+	}
+
+	ret = inode_ctx_get (inode, this, &ino);
+
+	if (inode->ino && ret < 0) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"%s(%s - %"PRId64") failed to get remote inode number",
+			loc->path, 
+			(which == GF_CLIENT_INODE_SELF? "self" : "parent"), 
+			inode->ino);
+	}
+
+out:
+	return ino;
+}
+
+
+static void
+this_ino_set (loc_t *loc, xlator_t *this, ino_t ino)
+{
+	ino_t    old_ino = 0;
+	int32_t  ret = -1;
+	inode_t *inode = NULL;
+
+	GF_VALIDATE_OR_GOTO ("client", this, out);
+
+	inode = loc->inode;
+	GF_VALIDATE_OR_GOTO (this->name, inode, out);
+
+	ret = inode_ctx_get (inode, this, &old_ino);
+
+	if (old_ino != ino) {
+		if (old_ino)
+			gf_log (this->name, GF_LOG_DEBUG,
+				"%s: inode number changed from %"PRId64" "
+				"to %"PRId64,
+				loc->path, old_ino, ino);
+
+		ret = inode_ctx_put (inode, this, ino);
+		if (ret < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"%s (%"PRId64"): failed to set remote "
+				"inode number to inode ctx",
+				loc->path, ino);
+		}
+	}
+out:
+	return;
+}
+
+
+static int
+this_fd_get (fd_t *file, xlator_t *this, int64_t *remote_fd)
+{
+	int ret = 0;
+	int dict_ret = -1;
+	uint64_t tmp_fd = 0;
+
+	GF_VALIDATE_OR_GOTO ("client", this, out);
+	GF_VALIDATE_OR_GOTO (this->name, file, out);
+	GF_VALIDATE_OR_GOTO (this->name, remote_fd, out);
+
+	dict_ret = fd_ctx_get (file, this, &tmp_fd);
+
+	if (dict_ret < 0) {
+		ret = -1;
+	}
+	*remote_fd = (int64_t)tmp_fd;
+out:
+	return ret;
+}
+
+
+static void
+this_fd_set (fd_t *file, xlator_t *this, loc_t *loc, int64_t fd)
+{
+	uint64_t old_fd = 0;
+	int32_t ret = -1;
+
+	GF_VALIDATE_OR_GOTO ("client", this, out);
+	GF_VALIDATE_OR_GOTO (this->name, file, out);
+
+	ret = fd_ctx_get (file, this, &old_fd);
+	if (ret >= 0) {
+		gf_log (this->name, GF_LOG_WARNING,
+			"%s (%"PRId64"): trying duplicate remote fd set. "
+			"%"PRId64" over-rides %"PRId64,
+			loc->path, loc->inode->ino, fd, old_fd);
+	}
+
+	ret = fd_ctx_set (file, this, (uint64_t)fd);
+	if (ret < 0) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"%s (%"PRId64"): failed to set remote fd",
+			loc->path, loc->inode->ino);
+	}
+out:
+	return;
+}
+
+
+static int 
+client_local_wipe (client_local_t *local)
+{
+	if (local) {
+		loc_wipe (&local->loc);
+
+		if (local->fd)
+			fd_unref (local->fd);
+
+		free (local);
+	} 
+	
+	return 0;
+}
+
+/*
+ * lookup_frame - lookup call frame corresponding to a given callid
+ * @trans: transport object
+ * @callid: call id of the frame
+ *
+ * not for external reference
+ */
+
+static call_frame_t *
+lookup_frame (transport_t *trans, int32_t op, int8_t type, int64_t callid)
+{
+	client_connection_t *conn = NULL;
+	call_frame_t        *frame = NULL;
+
+	conn = trans->xl_private;
+
+	pthread_mutex_lock (&conn->lock);
+	{
+		frame = saved_frames_get (conn->saved_frames,
+					  op, type, callid);
+	}
+	pthread_mutex_unlock (&conn->lock);
+
+	return frame;
+}
+
+
+static void
+call_bail (void *data)
+{
+	client_connection_t *conn = NULL;
+	struct timeval       current;
+	int32_t              bail_out = 0;
+	transport_t         *trans = NULL;
+
+	GF_VALIDATE_OR_GOTO("client", data, out);
+	trans = data;
+
+	conn = trans->xl_private;
+
+	gettimeofday (&current, NULL);
+	pthread_mutex_lock (&conn->lock);
+	{
+		/* Chaining to get call-always functionality from 
+		   call-once timer */
+		if (conn->timer) {
+			struct timeval timeout = {0,};
+			gf_timer_cbk_t timer_cbk = conn->timer->cbk;
+
+			timeout.tv_sec = 10;
+			timeout.tv_usec = 0;
+
+			gf_timer_call_cancel (trans->xl->ctx, conn->timer);
+			conn->timer = gf_timer_call_after (trans->xl->ctx,
+							       timeout,
+							       timer_cbk,
+							       trans);
+			if (conn->timer == NULL) {
+				gf_log (trans->xl->name, GF_LOG_DEBUG,
+					"Cannot create bailout timer");
+			}
+		}
+
+		if (((conn->saved_frames->count > 0) &&
+		     (RECEIVE_TIMEOUT(conn, current)) && 
+		     (SEND_TIMEOUT(conn, current)))) {
+
+			struct tm last_sent_tm, last_received_tm;
+			char last_sent[32] = {0,}, last_received[32] = {0,};
+
+			bail_out = 1;
+			
+			localtime_r (&conn->last_sent.tv_sec, 
+				     &last_sent_tm);
+			localtime_r (&conn->last_received.tv_sec, 
+				     &last_received_tm);
+			
+			strftime (last_sent, 32, 
+				  "%Y-%m-%d %H:%M:%S", &last_sent_tm);
+			strftime (last_received, 32, 
+				  "%Y-%m-%d %H:%M:%S", &last_received_tm);
+			
+			gf_log (trans->xl->name, GF_LOG_ERROR,
+				"activating bail-out. pending frames = %d. "
+				"last sent = %s. last received = %s. "
+				"transport-timeout = %d",
+				(int32_t) conn->saved_frames->count,
+				last_sent, last_received,
+				conn->transport_timeout);
+		}
+	}
+
+	if (bail_out) {
+		conn->ping_started = 0;
+	}
+
+	pthread_mutex_unlock (&conn->lock);
+
+	if (bail_out) {
+		gf_log (trans->xl->name, GF_LOG_CRITICAL,
+			"bailing transport");
+		transport_disconnect (trans);
+	}
+out:
+	return;
+}
+
+
+void
+save_frame (transport_t *trans, call_frame_t *frame,
+	    int32_t op, int8_t type, uint64_t callid)
+{
+	client_connection_t *conn = NULL;
+	struct timeval       timeout = {0, };
+
+
+	conn = trans->xl_private;
+
+	saved_frames_put (conn->saved_frames, frame, op, type, callid);
+
+	if (conn->timer == NULL) {
+		timeout.tv_sec  = 10;
+		timeout.tv_usec = 0;
+		conn->timer = gf_timer_call_after (trans->xl->ctx, timeout,
+						   call_bail, (void *) trans);
+       }
+}
+
+
+int
+client_get_forgets (xlator_t *this, client_forget_t *forget) 
+{
+	call_frame_t        *fr = NULL;
+	gf_hdr_common_t     *hdr = NULL;
+	size_t               hdrlen = 0;
+	gf_cbk_forget_req_t *req = NULL;
+	int                  ret = -1;
+	client_conf_t       *conf = NULL;
+	int                  count = 0;
+	int                  index = 0;
+
+	conf = this->private;
+
+	if (conf->forget.count > 0) {
+		count = conf->forget.count;
+		
+		hdrlen = gf_hdr_len (req, (count * sizeof (int64_t)));
+		hdr    = gf_hdr_new (req, (count * sizeof (int64_t)));
+		GF_VALIDATE_OR_GOTO (this->name, hdr, out);
+			
+		req    = gf_param (hdr);
+		
+		req->count = hton32 (count);
+		for (index = 0; index < count; index++) {
+			req->ino_array[index] = 
+				hton64 (conf->forget.ino_array[index]);
+		}
+		
+		fr = create_frame (this, this->ctx->pool);
+		GF_VALIDATE_OR_GOTO (this->name, fr, out);
+
+		conf->forget.frames_in_transit++;
+
+		forget->frame = fr;
+		forget->hdr   = hdr;
+		forget->hdrlen = hdrlen;
+		
+		ret = count;
+
+		conf->forget.count = 0;
+	}
+ out:
+	return ret;
+}
+
+
+void 
+client_ping_timer_expired (void *data)
+{
+	xlator_t            *this = NULL;
+	transport_t         *trans = NULL;
+	client_conf_t       *conf = NULL;
+	client_connection_t *conn = NULL;
+
+	trans = data;
+	this  = trans->xl;
+	conf  = this->private;
+	conn  = trans->xl_private;
+
+	gf_log (this->name, GF_LOG_ERROR, 
+		"ping timer expired! bailing transport");
+
+	pthread_mutex_lock (&conn->lock);
+	{
+		if (conn->ping_timer)
+			gf_timer_call_cancel (trans->xl->ctx, 
+					      conn->ping_timer);
+
+		conn->ping_started = 0;
+		conn->ping_timer = NULL;
+	}
+	pthread_mutex_unlock (&conn->lock);
+	transport_disconnect (trans);
+}
+
+
+void
+client_start_ping (void *data)
+{
+	xlator_t            *this = NULL;
+	transport_t         *trans = NULL;
+	client_conf_t       *conf = NULL;
+	client_connection_t *conn = NULL;
+	int32_t              ret = -1;
+	gf_hdr_common_t     *hdr = NULL;
+	struct timeval       timeout = {0, };
+	call_frame_t        *dummy_frame = NULL;
+	size_t               hdrlen = -1;
+	gf_mop_ping_req_t   *req = NULL;
+
+
+	trans = data;
+	this  = trans->xl;
+	conf  = this->private;
+	conn  = trans->xl_private;
+
+	pthread_mutex_lock (&conn->lock);
+	{
+		if ((conn->saved_frames->count == 0) || 
+		    !conn->connected) {
+			/* using goto looked ugly here, 
+			 * hence getting out this way */
+			if (conn->ping_timer)
+				gf_timer_call_cancel (trans->xl->ctx, 
+						      conn->ping_timer);
+			conn->ping_timer = NULL;
+			conn->ping_started = 0;
+			/* unlock */
+			pthread_mutex_unlock (&conn->lock);
+			return;
+		}
+
+		if (conn->saved_frames->count < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"saved_frames->count is %"PRId64, 
+				conn->saved_frames->count);
+			conn->saved_frames->count = 0;
+		}
+		timeout.tv_sec = conn->ping_timeout;
+		timeout.tv_usec = 0;
+		
+		conn->ping_timer = 
+			gf_timer_call_after (trans->xl->ctx, timeout,
+					     client_ping_timer_expired,
+					     (void *) trans);
+
+		if (conn->ping_timer == NULL) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"unable to setup timer");
+		} else
+			conn->ping_started = 1;
+	}
+	pthread_mutex_unlock (&conn->lock);
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+
+	dummy_frame = create_frame (this, this->ctx->pool);
+	dummy_frame->local = trans;
+
+	ret = protocol_client_xfer (dummy_frame, this, trans,
+				    GF_OP_TYPE_MOP_REQUEST, GF_MOP_PING,
+				    hdr, hdrlen, NULL, 0, NULL);
+}
+
+
+int
+client_ping_cbk (call_frame_t *frame, gf_hdr_common_t *hdr, size_t hdrlen,
+		 char *buf, size_t buflen)
+{
+	xlator_t            *this = NULL;
+	transport_t         *trans = NULL;
+	client_conf_t       *conf = NULL;
+	client_connection_t *conn = NULL;
+	struct timeval       timeout = {0, };
+	int                  op_ret = 0;
+
+	trans  = frame->local; frame->local = NULL;
+	this   = trans->xl;
+	conf   = this->private;
+	conn   = trans->xl_private;
+
+	op_ret = ntoh32 (hdr->rsp.op_ret);
+
+	if (op_ret == -1) {
+		/* timer expired and transport bailed out */
+		gf_log (this->name, GF_LOG_ERROR, "timer must have expired");
+		goto out;
+	}
+
+	pthread_mutex_lock (&conn->lock);
+	{
+		timeout.tv_sec  = conn->ping_timeout;
+		timeout.tv_usec = 0;
+
+		gf_timer_call_cancel (trans->xl->ctx, 
+				      conn->ping_timer);
+	
+		conn->ping_timer = 
+			gf_timer_call_after (trans->xl->ctx, timeout,
+					     client_start_ping, (void *)trans);
+		if (conn->ping_timer == NULL)
+			gf_log (this->name, GF_LOG_ERROR,
+				"gf_timer_call_after() returned NULL");
+	}
+	pthread_mutex_unlock (&conn->lock);
+out:
+	STACK_DESTROY (frame->root);
+	return 0;
+}
+
+
+int
+protocol_client_xfer (call_frame_t *frame, xlator_t *this, transport_t *trans,
+                      int type, int op,
+                      gf_hdr_common_t *hdr, size_t hdrlen,
+                      struct iovec *vector, int count,
+                      dict_t *refs)
+{
+	client_conf_t        *conf = NULL;
+	client_connection_t  *conn = NULL;
+	uint64_t              callid = 0;
+	int32_t               ret = -1;
+	int                   start_ping = 0;
+	gf_hdr_common_t       rsphdr = {0, };
+	client_forget_t       forget = {0, };
+	uint8_t               send_forget = 0;
+
+
+	conf  = this->private;
+
+	if (!trans) {
+		/* default to bulk op since it is 'safer' */
+		trans = conf->transport[CHANNEL_BULK];
+	}
+	conn  = trans->xl_private;
+
+	if (!((type == GF_OP_TYPE_CBK_REQUEST) && 
+	      (op == GF_CBK_FORGET))) 
+	{
+		LOCK (&conf->forget.lock);
+		{
+			ret = client_get_forgets (this, &forget);
+			if (ret <= 0)
+				send_forget = 0;
+			else
+				send_forget = 1;
+		}
+		UNLOCK (&conf->forget.lock);
+
+		if (send_forget) {
+			ret = protocol_client_xfer (forget.frame, this, NULL,
+						    GF_OP_TYPE_CBK_REQUEST, 
+						    GF_CBK_FORGET,
+						    forget.hdr, forget.hdrlen, 
+						    NULL, 0, NULL);
+		}
+	}
+
+	pthread_mutex_lock (&conn->lock);
+	{
+		callid = ++conn->callid;
+
+		hdr->callid = hton64 (callid);
+		hdr->op     = hton32 (op);
+		hdr->type   = hton32 (type);
+
+		if (frame) {
+			hdr->req.uid = hton32 (frame->root->uid);
+			hdr->req.gid = hton32 (frame->root->gid);
+			hdr->req.pid = hton32 (frame->root->pid);
+		}
+
+		if (conn->connected == 0)
+			transport_connect (trans);
+
+		ret = -1;
+
+		if (conn->connected ||
+		    ((type == GF_OP_TYPE_MOP_REQUEST) &&
+		     (op == GF_MOP_SETVOLUME))) {
+			ret = transport_submit (trans, (char *)hdr, hdrlen,
+						vector, count, refs);
+		}
+		
+		if ((ret >= 0) && frame) {
+			/* TODO: check this logic */
+			gettimeofday (&conn->last_sent, NULL);
+			save_frame (trans, frame, op, type, callid);
+		}
+
+		if (!conn->ping_started && (ret >= 0)) {
+			start_ping = 1;
+		}
+	}
+	pthread_mutex_unlock (&conn->lock);
+
+	if (start_ping)
+		client_start_ping ((void *) trans);
+
+	if (frame && (ret < 0)) {
+		rsphdr.op = op;
+		rsphdr.rsp.op_ret   = hton32 (-1);
+		rsphdr.rsp.op_errno = hton32 (ENOTCONN);
+
+		if (type == GF_OP_TYPE_FOP_REQUEST) {
+			rsphdr.type = GF_OP_TYPE_FOP_REPLY;
+			gf_fops[op] (frame, &rsphdr, sizeof (rsphdr), NULL, 0);
+		} else if (type == GF_OP_TYPE_MOP_REQUEST) {
+			rsphdr.type = GF_OP_TYPE_MOP_REPLY;
+			gf_mops[op] (frame, &rsphdr, sizeof (rsphdr), NULL, 0);
+		} else {
+			rsphdr.type = GF_OP_TYPE_CBK_REPLY;
+			gf_cbks[op] (frame, &rsphdr, sizeof (rsphdr), NULL, 0);
+		}
+	}
+
+	return ret;
+}
+
+
+
+/**
+ * client_create - create function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @path: complete path to file
+ * @flags: create flags
+ * @mode: create mode
+ *
+ * external reference through client_protocol_xlator->fops->create
+ */
+
+int
+client_create (call_frame_t *frame, xlator_t *this,
+               loc_t *loc, int32_t flags,
+               mode_t mode, fd_t *fd)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_create_req_t *req = NULL;
+	size_t               hdrlen = 0;
+	size_t               pathlen = 0;
+	size_t               baselen = 0;
+	int32_t              ret = -1;
+	ino_t                par = 0;
+	client_conf_t       *conf = NULL;
+	client_local_t      *local = NULL;
+
+
+	conf = this->private;
+
+	if (conf->child) {
+		STACK_WIND (frame, default_create_cbk,
+			    conf->child,
+			    conf->child->fops->create,
+			    loc, flags, mode, fd);
+		return 0;
+	}
+
+	local = calloc (1, sizeof (*local));
+	GF_VALIDATE_OR_GOTO(this->name, local, unwind);
+
+	local->fd = fd_ref (fd);
+	loc_copy (&local->loc, loc);
+	
+	frame->local = local;
+
+	pathlen = STRLEN_0(loc->path);
+	baselen = STRLEN_0(loc->name);
+	par = this_ino_get (loc, this, GF_CLIENT_INODE_PARENT);
+
+	hdrlen = gf_hdr_len (req, pathlen + baselen);
+	hdr    = gf_hdr_new (req, pathlen + baselen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->flags   = hton32 (flags);
+	req->mode    = hton32 (mode);
+	req->par     = hton64 (par);
+	strcpy (req->path, loc->path);
+	strcpy (req->bname + pathlen, loc->name);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_CREATE,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, fd, NULL, NULL);
+	return 0;
+
+}
+
+/**
+ * client_open - open function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location of file
+ * @flags: open flags
+ * @mode: open modes
+ *
+ * external reference through client_protocol_xlator->fops->open
+ */
+int
+client_open (call_frame_t *frame, xlator_t *this,
+             loc_t *loc, int32_t flags, fd_t *fd)
+{
+	int                 ret = -1;
+	gf_hdr_common_t    *hdr = NULL;
+	size_t              hdrlen = 0;
+	gf_fop_open_req_t  *req = NULL;
+	size_t              pathlen = 0;
+	ino_t               ino = 0;
+	client_conf_t      *conf = NULL;
+	client_local_t     *local = NULL;
+
+	conf = this->private;
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame, default_open_cbk,
+			    conf->child,
+			    conf->child->fops->open,
+			    loc, flags, fd);
+		
+		return 0;
+	}
+
+	local = calloc (1, sizeof (*local));
+	GF_VALIDATE_OR_GOTO(this->name, local, unwind);
+
+	local->fd = fd_ref (fd);
+	loc_copy (&local->loc, loc);	
+
+	frame->local = local;
+
+	pathlen = STRLEN_0(loc->path);
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, pathlen);
+	hdr    = gf_hdr_new (req, pathlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino   = hton64 (ino);
+	req->flags = hton32 (flags);
+	strcpy (req->path, loc->path);
+	
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_OPEN,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, fd);
+	return 0;
+
+}
+
+
+/**
+ * client_stat - stat function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location
+ *
+ * external reference through client_protocol_xlator->fops->stat
+ */
+int32_t
+client_stat (call_frame_t *frame,
+             xlator_t *this,
+             loc_t *loc)
+{
+	gf_hdr_common_t   *hdr = NULL;
+	gf_fop_stat_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int32_t ret = -1;
+	size_t  pathlen = 0;
+	ino_t   ino = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_stat_cbk,
+			    conf->child,
+			    conf->child->fops->stat,
+			    loc);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, pathlen);
+	hdr    = gf_hdr_new (req, pathlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino  = hton64 (ino);
+	strcpy (req->path, loc->path);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_STAT,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+
+}
+
+
+/**
+ * client_readlink - readlink function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location
+ * @size:
+ *
+ * external reference through client_protocol_xlator->fops->readlink
+ */
+int32_t
+client_readlink (call_frame_t *frame,
+                 xlator_t *this,
+                 loc_t *loc,
+                 size_t size)
+{
+	gf_hdr_common_t       *hdr = NULL;
+	gf_fop_readlink_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int    ret = -1;
+	size_t pathlen = 0;
+	ino_t  ino = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_readlink_cbk,
+			    conf->child,
+			    conf->child->fops->readlink,
+			    loc,
+			    size);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, pathlen);
+	hdr    = gf_hdr_new (req, pathlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino  = hton64 (ino);
+	req->size = hton32 (size);
+	strcpy (req->path, loc->path);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_READLINK,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+
+}
+
+
+/**
+ * client_mknod - mknod function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @path: pathname of node
+ * @mode:
+ * @dev:
+ *
+ * external reference through client_protocol_xlator->fops->mknod
+ */
+int32_t
+client_mknod (call_frame_t *frame,
+              xlator_t *this,
+              loc_t *loc,
+              mode_t mode,
+              dev_t dev)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_mknod_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int    ret = -1;
+	size_t pathlen = 0;
+	size_t baselen = 0;
+	ino_t  par = 0;
+	client_conf_t *conf = this->private;
+	client_local_t *local = NULL;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_mknod_cbk,
+			    conf->child,
+			    conf->child->fops->mknod,
+			    loc, mode, dev);
+
+		return 0;
+	}
+
+	local = calloc (1, sizeof (*local));
+	GF_VALIDATE_OR_GOTO(this->name, local, unwind);
+
+	loc_copy (&local->loc, loc);	
+
+	frame->local = local;
+
+	pathlen = STRLEN_0(loc->path);
+	baselen = STRLEN_0(loc->name);
+	par = this_ino_get (loc, this, GF_CLIENT_INODE_PARENT);
+
+	hdrlen = gf_hdr_len (req, pathlen + baselen);
+	hdr    = gf_hdr_new (req, pathlen + baselen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->par  = hton64 (par);
+	req->mode = hton32 (mode);
+	req->dev  = hton64 (dev);
+	strcpy (req->path, loc->path);
+	strcpy (req->bname + pathlen, loc->name);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_MKNOD,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, loc->inode, NULL);
+	return 0;
+
+}
+
+
+/**
+ * client_mkdir - mkdir function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @path: pathname of directory
+ * @mode:
+ *
+ * external reference through client_protocol_xlator->fops->mkdir
+ */
+int32_t
+client_mkdir (call_frame_t *frame,
+              xlator_t *this,
+              loc_t *loc,
+              mode_t mode)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_mkdir_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int    ret = -1;
+	size_t pathlen = 0;
+	size_t baselen = 0;
+	ino_t  par = 0;
+	client_conf_t *conf = this->private;
+	client_local_t *local = NULL;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_mkdir_cbk,
+			    conf->child,
+			    conf->child->fops->mkdir,
+			    loc, mode);
+		
+		return 0;
+	}
+
+	local = calloc (1, sizeof (*local));
+	GF_VALIDATE_OR_GOTO(this->name, local, unwind);
+	
+	loc_copy (&local->loc, loc);
+
+	frame->local = local;
+
+	pathlen = STRLEN_0(loc->path);
+	baselen = STRLEN_0(loc->name);
+	par = this_ino_get (loc, this, GF_CLIENT_INODE_PARENT);
+
+	hdrlen = gf_hdr_len (req, pathlen + baselen);
+	hdr    = gf_hdr_new (req, pathlen + baselen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->par  = hton64 (par);
+	req->mode = hton32 (mode);
+	strcpy (req->path, loc->path);
+	strcpy (req->bname + pathlen, loc->name);
+	
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_MKDIR,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, loc->inode, NULL);
+	return 0;
+
+}
+
+
+
+/**
+ * client_unlink - unlink function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location of file
+ *
+ * external reference through client_protocol_xlator->fops->unlink
+ */
+int32_t
+client_unlink (call_frame_t *frame,
+               xlator_t *this,
+               loc_t *loc)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_unlink_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int    ret = -1;
+	size_t pathlen = 0;
+	size_t baselen = 0;
+	ino_t  par = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_unlink_cbk,
+			    conf->child,
+			    conf->child->fops->unlink,
+			    loc);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	baselen = STRLEN_0(loc->name);
+	par = this_ino_get (loc, this, GF_CLIENT_INODE_PARENT);
+
+	hdrlen = gf_hdr_len (req, pathlen + baselen);
+	hdr    = gf_hdr_new (req, pathlen + baselen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->par  = hton64 (par);
+	strcpy (req->path, loc->path);
+	strcpy (req->bname + pathlen, loc->name);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_UNLINK,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL);
+	return 0;
+
+}
+
+/**
+ * client_rmdir - rmdir function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location
+ *
+ * external reference through client_protocol_xlator->fops->rmdir
+ */
+int32_t
+client_rmdir (call_frame_t *frame,
+              xlator_t *this,
+              loc_t *loc)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_rmdir_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int    ret = -1;
+	size_t pathlen = 0;
+	size_t baselen = 0;
+	ino_t  par = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_rmdir_cbk,
+			    conf->child,
+			    conf->child->fops->rmdir,
+			    loc);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	baselen = STRLEN_0(loc->name);
+	par = this_ino_get (loc, this, GF_CLIENT_INODE_PARENT);
+
+	hdrlen = gf_hdr_len (req, pathlen + baselen);
+	hdr    = gf_hdr_new (req, pathlen + baselen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->par  = hton64 (par);
+	strcpy (req->path, loc->path);
+	strcpy (req->bname + pathlen, loc->name);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_RMDIR,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL);
+	return 0;
+
+}
+
+
+
+/**
+ * client_symlink - symlink function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @oldpath: pathname of target
+ * @newpath: pathname of symlink
+ *
+ * external reference through client_protocol_xlator->fops->symlink
+ */
+int32_t
+client_symlink (call_frame_t *frame,
+                xlator_t *this,
+                const char *linkname,
+                loc_t *loc)
+{
+	int ret = -1;
+	gf_hdr_common_t      *hdr = NULL;
+	gf_fop_symlink_req_t *req = NULL;
+	size_t hdrlen  = 0;
+	size_t pathlen = 0;
+	size_t newlen  = 0;
+	size_t baselen = 0;
+	ino_t par = 0;
+	client_conf_t *conf = this->private;
+	client_local_t *local = NULL;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_symlink_cbk,
+			    conf->child,
+			    conf->child->fops->symlink,
+			    linkname, loc);
+		
+		return 0;
+	}
+
+	local = calloc (1, sizeof (*local));
+	GF_VALIDATE_OR_GOTO(this->name, local, unwind);
+	
+	loc_copy (&local->loc, loc);
+
+	frame->local = local;
+
+	pathlen = STRLEN_0 (loc->path);
+	baselen = STRLEN_0 (loc->name);
+	newlen = STRLEN_0 (linkname);
+	par = this_ino_get (loc, this, GF_CLIENT_INODE_PARENT);
+
+	hdrlen = gf_hdr_len (req, pathlen + baselen + newlen);
+	hdr    = gf_hdr_new (req, pathlen + baselen + newlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->par =  hton64 (par);
+	strcpy (req->path, loc->path);
+	strcpy (req->bname + pathlen, loc->name);
+	strcpy (req->linkname + pathlen + baselen, linkname);
+	
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_SYMLINK,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, loc->inode, NULL);
+	return 0;
+
+}
+
+
+/**
+ * client_rename - rename function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @oldloc: location of old pathname
+ * @newloc: location of new pathname
+ *
+ * external reference through client_protocol_xlator->fops->rename
+ */
+int32_t
+client_rename (call_frame_t *frame,
+               xlator_t *this,
+               loc_t *oldloc,
+               loc_t *newloc)
+{
+	int ret = -1;
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_rename_req_t *req = NULL;
+	size_t hdrlen = 0;
+	size_t oldpathlen = 0;
+	size_t oldbaselen = 0;
+	size_t newpathlen = 0;
+	size_t newbaselen = 0;
+	ino_t  oldpar = 0;
+	ino_t  newpar = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_rename_cbk,
+			    conf->child,
+			    conf->child->fops->rename,
+			    oldloc, newloc);
+		
+		return 0;
+	}
+
+	oldpathlen = STRLEN_0(oldloc->path);
+	oldbaselen = STRLEN_0(oldloc->name);
+	newpathlen = STRLEN_0(newloc->path);
+	newbaselen = STRLEN_0(newloc->name);
+	oldpar = this_ino_get (oldloc, this, GF_CLIENT_INODE_PARENT);
+	newpar = this_ino_get (newloc, this, GF_CLIENT_INODE_PARENT);
+
+	hdrlen = gf_hdr_len (req, (oldpathlen + oldbaselen + 
+				   newpathlen + newbaselen));
+	hdr    = gf_hdr_new (req, (oldpathlen + oldbaselen + 
+				   newpathlen + newbaselen));
+
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->oldpar = hton64 (oldpar);
+	req->newpar = hton64 (newpar);
+
+	strcpy (req->oldpath, oldloc->path);
+	strcpy (req->oldbname + oldpathlen, oldloc->name);
+	strcpy (req->newpath  + oldpathlen + oldbaselen, newloc->path);
+	strcpy (req->newbname + oldpathlen + oldbaselen + newpathlen, 
+		newloc->name);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_RENAME,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+
+}
+
+
+
+/**
+ * client_link - link function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @oldloc: location of old pathname
+ * @newpath: new pathname
+ *
+ * external reference through client_protocol_xlator->fops->link
+ */
+
+int32_t
+client_link (call_frame_t *frame,
+             xlator_t *this,
+             loc_t *oldloc,
+             loc_t *newloc)
+{
+	int ret = -1;
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_link_req_t *req = NULL;
+	size_t hdrlen = 0;
+	size_t oldpathlen = 0;
+	size_t newpathlen = 0;
+	size_t newbaselen = 0;
+	ino_t  oldino = 0;
+	ino_t  newpar = 0;
+	client_conf_t *conf = this->private;
+	client_local_t *local = NULL;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_link_cbk,
+			    conf->child,
+			    conf->child->fops->link,
+			    oldloc, newloc);
+		
+		return 0;
+	}
+
+	local = calloc (1, sizeof (*local));
+	GF_VALIDATE_OR_GOTO(this->name, local, unwind);
+
+	loc_copy (&local->loc, oldloc);
+
+	frame->local = local;
+
+	oldpathlen = STRLEN_0(oldloc->path);
+	newpathlen = STRLEN_0(newloc->path);
+	newbaselen = STRLEN_0(newloc->name);
+	oldino = this_ino_get (oldloc, this, GF_CLIENT_INODE_SELF);
+	newpar = this_ino_get (newloc, this, GF_CLIENT_INODE_PARENT);
+
+	hdrlen = gf_hdr_len (req, oldpathlen + newpathlen + newbaselen);
+	hdr    = gf_hdr_new (req, oldpathlen + newpathlen + newbaselen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	strcpy (req->oldpath, oldloc->path);
+	strcpy (req->newpath  + oldpathlen, newloc->path);
+	strcpy (req->newbname + oldpathlen + newpathlen, newloc->name);
+
+	req->oldino = hton64 (oldino);
+	req->newpar = hton64 (newpar);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_LINK,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, oldloc->inode, NULL);
+	return 0;
+}
+
+
+
+/**
+ * client_chmod - chmod function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location
+ * @mode:
+ *
+ * external reference through client_protocol_xlator->fops->chmod
+ */
+int32_t
+client_chmod (call_frame_t *frame,
+              xlator_t *this,
+              loc_t *loc,
+              mode_t mode)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_chmod_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int    ret = -1;
+	size_t pathlen = 0;
+	ino_t  ino = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_chmod_cbk,
+			    conf->child,
+			    conf->child->fops->chmod,
+			    loc,
+			    mode);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, pathlen);
+	hdr    = gf_hdr_new (req, pathlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino     = hton64 (ino);
+	req->mode    = hton32 (mode);
+	strcpy (req->path, loc->path);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_CHMOD,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+
+}
+
+
+/**
+ * client_chown - chown function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location
+ * @uid: uid of new owner
+ * @gid: gid of new owner group
+ *
+ * external reference through client_protocol_xlator->fops->chown
+ */
+int32_t
+client_chown (call_frame_t *frame,
+              xlator_t *this,
+              loc_t *loc,
+              uid_t uid,
+              gid_t gid)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_chown_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int    ret = -1;
+	size_t pathlen = 0;
+	ino_t  ino = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_chown_cbk,
+			    conf->child,
+			    conf->child->fops->chown,
+			    loc,
+			    uid,
+			    gid);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, pathlen);
+	hdr    = gf_hdr_new (req, pathlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino = hton64 (ino);
+	req->uid = hton32 (uid);
+	req->gid = hton32 (gid);
+	strcpy (req->path, loc->path);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_CHOWN,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+
+}
+
+/**
+ * client_truncate - truncate function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location
+ * @offset:
+ *
+ * external reference through client_protocol_xlator->fops->truncate
+ */
+int32_t
+client_truncate (call_frame_t *frame,
+                 xlator_t *this,
+                 loc_t *loc,
+                 off_t offset)
+{
+	gf_hdr_common_t       *hdr = NULL;
+	gf_fop_truncate_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int    ret = -1;
+	size_t pathlen = 0;
+	ino_t  ino = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_truncate_cbk,
+			    conf->child,
+			    conf->child->fops->truncate,
+			    loc,
+			    offset);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, pathlen);
+	hdr    = gf_hdr_new (req, pathlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino    = hton64 (ino);
+	req->offset = hton64 (offset);
+	strcpy (req->path, loc->path);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_TRUNCATE,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+
+}
+
+
+
+/**
+ * client_utimes - utimes function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location
+ * @tvp:
+ *
+ * external reference through client_protocol_xlator->fops->utimes
+ */
+int32_t
+client_utimens (call_frame_t *frame,
+                xlator_t *this,
+                loc_t *loc,
+                struct timespec *tvp)
+{
+	gf_hdr_common_t      *hdr = NULL;
+	gf_fop_utimens_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int    ret = -1;
+	size_t pathlen = 0;
+	ino_t  ino = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_utimens_cbk,
+			    conf->child,
+			    conf->child->fops->utimens,
+			    loc,
+			    tvp);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, pathlen);
+	hdr    = gf_hdr_new (req, pathlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino = hton64 (ino);
+	gf_timespec_from_timespec (req->tv, tvp);
+	strcpy (req->path, loc->path);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_UTIMENS,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+
+}
+
+
+
+/**
+ * client_readv - readv function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @fd: file descriptor structure
+ * @size:
+ * @offset:
+ *
+ * external reference through client_protocol_xlator->fops->readv
+ */
+int32_t
+client_readv (call_frame_t *frame,
+              xlator_t *this,
+              fd_t *fd,
+              size_t size,
+              off_t offset)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_read_req_t *req = NULL;
+	size_t hdrlen = 0;
+	int64_t remote_fd = -1;
+	int ret = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_readv_cbk,
+			    conf->child,
+			    conf->child->fops->readv,
+			    fd,
+			    size,
+			    offset);
+		
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd, returning EBADFD",
+			fd->inode->ino);
+		STACK_UNWIND (frame, -1, EBADFD, NULL, 0, NULL);
+		return 0;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->fd     = hton64 (remote_fd);
+	req->size   = hton32 (size);
+	req->offset = hton64 (offset);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_READ,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, NULL, 0, NULL);
+	return 0;
+
+}
+
+
+/**
+ * client_writev - writev function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @fd: file descriptor structure
+ * @vector:
+ * @count:
+ * @offset:
+ *
+ * external reference through client_protocol_xlator->fops->writev
+ */
+int32_t
+client_writev (call_frame_t *frame,
+               xlator_t *this,
+               fd_t *fd,
+               struct iovec *vector,
+               int32_t count,
+               off_t offset)
+{
+	gf_hdr_common_t    *hdr = NULL;
+	gf_fop_write_req_t *req = NULL;
+	size_t  hdrlen = 0;
+	int64_t remote_fd = -1;
+	int     ret = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_writev_cbk,
+			    conf->child,
+			    conf->child->fops->writev,
+			    fd,
+			    vector,
+			    count,
+			    offset);
+		
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD",
+			fd->inode->ino);
+		STACK_UNWIND (frame, -1, EBADFD, NULL);
+		return 0;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->fd     = hton64 (remote_fd);
+	req->size   = hton32 (iov_length (vector, count));
+	req->offset = hton64 (offset);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_WRITE,
+				    hdr, hdrlen, vector, count,
+				    frame->root->req_refs);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+
+}
+
+
+/**
+ * client_statfs - statfs function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location
+ *
+ * external reference through client_protocol_xlator->fops->statfs
+ */
+int32_t
+client_statfs (call_frame_t *frame,
+               xlator_t *this,
+               loc_t *loc)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_statfs_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int    ret = -1;
+	size_t pathlen = 0;
+	ino_t  ino = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_statfs_cbk,
+			    conf->child,
+			    conf->child->fops->statfs,
+			    loc);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, pathlen);
+	hdr    = gf_hdr_new (req, pathlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino = hton64 (ino);
+	strcpy (req->path, loc->path);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_STATFS,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+
+}
+
+
+/**
+ * client_flush - flush function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @fd: file descriptor structure
+ *
+ * external reference through client_protocol_xlator->fops->flush
+ */
+
+int32_t
+client_flush (call_frame_t *frame,
+              xlator_t *this,
+              fd_t *fd)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_flush_req_t *req = NULL;
+	size_t hdrlen = 0;
+	int64_t remote_fd = -1;
+	int ret = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_flush_cbk,
+			    conf->child,
+			    conf->child->fops->flush,
+			    fd);
+		
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD",
+			fd->inode->ino);
+		STACK_UNWIND (frame, -1, EBADFD);
+		return 0;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->fd = hton64 (remote_fd);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_FLUSH,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL);
+	return 0;
+
+}
+
+
+
+
+/**
+ * client_fsync - fsync function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @fd: file descriptor structure
+ * @flags:
+ *
+ * external reference through client_protocol_xlator->fops->fsync
+ */
+
+int32_t
+client_fsync (call_frame_t *frame,
+              xlator_t *this,
+              fd_t *fd,
+              int32_t flags)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_fsync_req_t *req = NULL;
+	size_t hdrlen = 0;
+	int64_t remote_fd = -1;
+	int32_t ret = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_fsync_cbk,
+			    conf->child,
+			    conf->child->fops->fsync,
+			    fd,
+			    flags);
+		
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD", 
+			fd->inode->ino);
+		STACK_UNWIND(frame, -1, EBADFD);
+		return 0;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->fd   = hton64 (remote_fd);
+	req->data = hton32 (flags);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_FSYNC,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL);
+	return 0;
+
+}
+
+int32_t
+client_xattrop (call_frame_t *frame,
+		xlator_t *this,
+		loc_t *loc,
+		gf_xattrop_flags_t flags,
+		dict_t *dict)
+{
+	gf_hdr_common_t      *hdr = NULL;
+	gf_fop_xattrop_req_t *req = NULL;
+	size_t  hdrlen = 0;
+	size_t  dict_len = 0;
+	int32_t ret = -1;
+	size_t  pathlen = 0;
+	ino_t   ino = 0;
+	client_conf_t *conf = NULL;
+
+	GF_VALIDATE_OR_GOTO("client", this, unwind);
+
+	conf = this->private;
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_xattrop_cbk,
+			    conf->child,
+			    conf->child->fops->xattrop,
+			    loc,
+			    flags,
+			    dict);
+		
+		return 0;
+	}
+
+	GF_VALIDATE_OR_GOTO(this->name, loc, unwind);
+
+	if (dict) {
+		dict_len = dict_serialized_length (dict);
+		if (dict_len < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"failed to get serialized length of dict(%p)",
+				dict);
+			goto unwind;
+		}
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, dict_len + pathlen);
+	hdr    = gf_hdr_new (req, dict_len + pathlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->flags = hton32 (flags);
+	req->dict_len = hton32 (dict_len);
+	if (dict) {
+		ret = dict_serialize (dict, req->dict);
+		if (ret < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"failed to serialize dictionary(%p)",
+				dict);
+			goto unwind;
+		}
+	}
+	req->ino = hton64 (ino);
+	strcpy (req->path + dict_len, loc->path);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_XATTROP,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+}
+
+
+int32_t
+client_fxattrop (call_frame_t *frame,
+		 xlator_t *this,
+		 fd_t *fd,
+		 gf_xattrop_flags_t flags,
+		 dict_t *dict)
+{
+	gf_hdr_common_t      *hdr = NULL;
+	gf_fop_fxattrop_req_t *req = NULL;
+	size_t  hdrlen = 0;
+	size_t  dict_len = 0;
+	int64_t remote_fd = -1;
+	int32_t ret = -1;
+	ino_t   ino = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_fxattrop_cbk,
+			    conf->child,
+			    conf->child->fops->fxattrop,
+			    fd,
+			    flags,
+			    dict);
+		
+		return 0;
+	}
+
+	if (dict) {
+		dict_len = dict_serialized_length (dict);
+		if (dict_len < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"failed to get serialized length of dict(%p)",
+				dict);
+			goto unwind;
+		}
+	}
+
+	if (fd) {
+		ret = this_fd_get (fd, this, &remote_fd);
+		if (ret == -1) {
+			gf_log (this->name, GF_LOG_DEBUG,
+				"(%"PRId64"): failed to get remote fd. returning EBADFD", 
+				fd->inode->ino);
+			goto unwind;
+		}
+		ino = fd->inode->ino;
+	}
+
+	hdrlen = gf_hdr_len (req, dict_len);
+	hdr    = gf_hdr_new (req, dict_len);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->flags = hton32 (flags);
+	req->dict_len = hton32 (dict_len);
+	if (dict) {
+		ret = dict_serialize (dict, req->dict);
+		if (ret < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"failed to serialize dictionary(%p)",
+				dict);
+			goto unwind;
+		}
+	}
+	req->fd = hton64 (remote_fd);
+	req->ino = hton64 (ino);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_FXATTROP,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+
+	STACK_UNWIND (frame, -1, EBADFD, NULL);
+	return 0;
+
+}
+
+
+/**
+ * client_setxattr - setxattr function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location
+ * @dict: dictionary which contains key:value to be set.
+ * @flags:
+ *
+ * external reference through client_protocol_xlator->fops->setxattr
+ */
+int32_t
+client_setxattr (call_frame_t *frame,
+                 xlator_t *this,
+                 loc_t *loc,
+                 dict_t *dict,
+                 int32_t flags)
+{
+	gf_hdr_common_t       *hdr = NULL;
+	gf_fop_setxattr_req_t *req = NULL;
+	size_t hdrlen = 0;
+	size_t dict_len = 0;
+	int    ret = -1;
+	size_t pathlen = 0;
+	ino_t  ino = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_setxattr_cbk,
+			    conf->child,
+			    conf->child->fops->setxattr,
+			    loc,
+			    dict,
+			    flags);
+		
+		return 0;
+	}
+
+	dict_len = dict_serialized_length (dict);
+	if (dict_len < 0) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"failed to get serialized length of dict(%p)",
+			dict);
+		goto unwind;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, dict_len + pathlen);
+	hdr    = gf_hdr_new (req, dict_len + pathlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino   = hton64 (ino);
+	req->flags = hton32 (flags);
+	req->dict_len = hton32 (dict_len);
+
+	ret = dict_serialize (dict, req->dict);
+	if (ret < 0) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"failed to serialize dictionary(%p)",
+			dict);
+		goto unwind;
+	}
+
+	strcpy (req->path + dict_len, loc->path);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_SETXATTR,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+
+	STACK_UNWIND(frame, -1, EINVAL);
+	return 0;
+}
+
+/**
+ * client_getxattr - getxattr function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location structure
+ *
+ * external reference through client_protocol_xlator->fops->getxattr
+ */
+int32_t
+client_getxattr (call_frame_t *frame,
+                 xlator_t *this,
+                 loc_t *loc,
+                 const char *name)
+{
+	int ret = -1;
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_getxattr_req_t *req = NULL;
+	size_t hdrlen = 0;
+	size_t pathlen = 0;
+	size_t namelen = 0;
+	ino_t  ino = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_getxattr_cbk,
+			    conf->child,
+			    conf->child->fops->getxattr,
+			    loc,
+			    name);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	if (name)
+		namelen = STRLEN_0(name);
+
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, pathlen + namelen);
+	hdr    = gf_hdr_new (req, pathlen + namelen);
+	GF_VALIDATE_OR_GOTO(frame->this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino   = hton64 (ino);
+	req->namelen = hton32 (namelen);
+	strcpy (req->path, loc->path);
+	if (name)
+		strcpy (req->name + pathlen, name);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_GETXATTR,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+}
+
+/**
+ * client_removexattr - removexattr function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location structure
+ * @name:
+ *
+ * external reference through client_protocol_xlator->fops->removexattr
+ */
+int32_t
+client_removexattr (call_frame_t *frame,
+                    xlator_t *this,
+                    loc_t *loc,
+                    const char *name)
+{
+	int ret = -1;
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_removexattr_req_t *req = NULL;
+	size_t hdrlen = 0;
+	size_t namelen = 0;
+	size_t pathlen = 0;
+	ino_t  ino = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_removexattr_cbk,
+			    conf->child,
+			    conf->child->fops->removexattr,
+			    loc,
+			    name);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	namelen = STRLEN_0(name);
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, pathlen + namelen);
+	hdr    = gf_hdr_new (req, pathlen + namelen);
+	GF_VALIDATE_OR_GOTO(frame->this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino   = hton64 (ino);
+	strcpy (req->path, loc->path);
+	strcpy (req->name + pathlen, name);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_REMOVEXATTR,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL);
+	return 0;
+}
+
+
+/**
+ * client_opendir - opendir function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location structure
+ *
+ * external reference through client_protocol_xlator->fops->opendir
+ */
+int32_t
+client_opendir (call_frame_t *frame,
+                xlator_t *this,
+                loc_t *loc,
+                fd_t *fd)
+{
+	gf_fop_opendir_req_t *req = NULL;
+	gf_hdr_common_t      *hdr = NULL;
+	size_t hdrlen = 0;
+	int    ret = -1;
+	ino_t  ino = 0;
+	size_t pathlen = 0;
+	client_conf_t *conf = this->private;
+	client_local_t *local = NULL;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_opendir_cbk,
+			    conf->child,
+			    conf->child->fops->opendir,
+			    loc, fd);
+		
+		return 0;
+	}
+
+	local = calloc (1, sizeof (*local));
+	GF_VALIDATE_OR_GOTO(this->name, local, unwind);
+
+	loc_copy (&local->loc, loc);
+	local->fd = fd_ref (fd);
+
+	frame->local = local;
+	
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+	pathlen = STRLEN_0(loc->path);
+
+	hdrlen = gf_hdr_len (req, pathlen);
+	hdr    = gf_hdr_new (req, pathlen);
+	GF_VALIDATE_OR_GOTO(frame->this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino = hton64 (ino);
+	strcpy (req->path, loc->path);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_OPENDIR,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, fd);
+	return 0;
+
+}
+
+
+/**
+ * client_readdir - readdir function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ *
+ * external reference through client_protocol_xlator->fops->readdir
+ */
+
+int32_t
+client_getdents (call_frame_t *frame,
+                 xlator_t *this,
+                 fd_t *fd,
+                 size_t size,
+                 off_t offset,
+                 int32_t flag)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_getdents_req_t *req = NULL;
+	size_t hdrlen = 0;
+	int64_t remote_fd = -1;
+	int ret = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_getdents_cbk,
+			    conf->child,
+			    conf->child->fops->getdents,
+			    fd,
+			    size,
+			    offset,
+			    flag);
+		
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD", 
+			fd->inode->ino);
+		STACK_UNWIND (frame, -1, EBADFD, NULL);
+		return 0;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO(frame->this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+	GF_VALIDATE_OR_GOTO(frame->this->name, hdr, unwind);
+
+	req->fd     = hton64 (remote_fd);
+	req->size   = hton32 (size);
+	req->offset = hton64 (offset);
+	req->flags  = hton32 (flag);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_GETDENTS,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+unwind:
+	STACK_UNWIND(frame, -1, EINVAL, NULL, 0);
+	return 0;
+}
+
+/**
+ * client_readdir - readdir function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ *
+ * external reference through client_protocol_xlator->fops->readdir
+ */
+
+int32_t
+client_readdir (call_frame_t *frame,
+		xlator_t *this,
+		fd_t *fd,
+		size_t size,
+		off_t offset)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_readdir_req_t *req = NULL;
+	size_t hdrlen = 0;
+	int64_t remote_fd = -1;
+	int ret = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_readdir_cbk,
+			    conf->child,
+			    conf->child->fops->readdir,
+			    fd, size, offset);
+		
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD", 
+			fd->inode->ino);
+		goto unwind;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req->fd     = hton64 (remote_fd);
+	req->size   = hton32 (size);
+	req->offset = hton64 (offset);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_READDIR,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND (frame, -1, EBADFD, NULL);
+	return 0;
+
+}
+
+
+
+/**
+ * client_fsyncdir - fsyncdir function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @fd: file descriptor structure
+ * @flags:
+ *
+ * external reference through client_protocol_xlator->fops->fsyncdir
+ */
+
+int32_t
+client_fsyncdir (call_frame_t *frame,
+                 xlator_t *this,
+                 fd_t *fd,
+                 int32_t flags)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_fsyncdir_req_t *req = NULL;
+	size_t hdrlen = 0;
+	int64_t remote_fd = -1;
+	int32_t ret = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_fsyncdir_cbk,
+			    conf->child,
+			    conf->child->fops->fsyncdir,
+			    fd,
+			    flags);
+		
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD", 
+			fd->inode->ino);
+		goto unwind;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->data = hton32 (flags);
+	req->fd   = hton64 (remote_fd);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_FSYNCDIR,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	STACK_UNWIND (frame, -1, EBADFD);
+	return 0;
+}
+
+
+/**
+ * client_access - access function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @loc: location structure
+ * @mode:
+ *
+ * external reference through client_protocol_xlator->fops->access
+ */
+int32_t
+client_access (call_frame_t *frame,
+               xlator_t *this,
+               loc_t *loc,
+               int32_t mask)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_access_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int    ret = -1;
+	ino_t  ino = 0;
+	size_t pathlen = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_access_cbk,
+			    conf->child,
+			    conf->child->fops->access,
+			    loc,
+			    mask);
+		
+		return 0;
+	}
+
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+	pathlen = STRLEN_0(loc->path);
+
+	hdrlen = gf_hdr_len (req, pathlen);
+	hdr    = gf_hdr_new (req, pathlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino  = hton64 (ino);
+	req->mask = hton32 (mask);
+	strcpy (req->path, loc->path);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_ACCESS,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+
+	STACK_UNWIND(frame, -1, EINVAL);
+	return 0;
+
+}
+
+
+/**
+ * client_ftrucate - ftruncate function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @fd: file descriptor structure
+ * @offset: offset to truncate to
+ *
+ * external reference through client_protocol_xlator->fops->ftruncate
+ */
+
+int32_t
+client_ftruncate (call_frame_t *frame,
+                  xlator_t *this,
+                  fd_t *fd,
+                  off_t offset)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_ftruncate_req_t *req = NULL;
+	int64_t remote_fd = -1;
+	size_t hdrlen = -1;
+	int ret = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_ftruncate_cbk,
+			    conf->child,
+			    conf->child->fops->ftruncate,
+			    fd,
+			    offset);
+		
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD", 
+			fd->inode->ino);
+		STACK_UNWIND (frame, -1, EBADFD, NULL);
+		return 0;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->fd     = hton64 (remote_fd);
+	req->offset = hton64 (offset);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_FTRUNCATE,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+
+}
+
+
+/**
+ * client_fstat - fstat function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @fd: file descriptor structure
+ *
+ * external reference through client_protocol_xlator->fops->fstat
+ */
+
+int32_t
+client_fstat (call_frame_t *frame,
+              xlator_t *this,
+              fd_t *fd)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_fstat_req_t *req = NULL;
+	int64_t remote_fd = -1;
+	size_t hdrlen = -1;
+	int ret = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_fstat_cbk,
+			    conf->child,
+			    conf->child->fops->fstat,
+			    fd);
+		
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD",
+			fd->inode->ino);
+		STACK_UNWIND (frame, -1, EBADFD, NULL);
+		return 0;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->fd = hton64 (remote_fd);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_FSTAT,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+
+}
+
+
+/**
+ * client_lk - lk function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @fd: file descriptor structure
+ * @cmd: lock command
+ * @lock:
+ *
+ * external reference through client_protocol_xlator->fops->lk
+ */
+int32_t
+client_lk (call_frame_t *frame,
+           xlator_t *this,
+           fd_t *fd,
+           int32_t cmd,
+           struct flock *flock)
+{
+	int ret = -1;
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_lk_req_t *req = NULL;
+	size_t hdrlen = 0;
+	int64_t remote_fd = -1;
+	int32_t gf_cmd = 0;
+	int32_t gf_type = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_lk_cbk,
+			    conf->child,
+			    conf->child->fops->lk,
+			    fd,
+			    cmd,
+			    flock);
+		
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD",
+			fd->inode->ino);
+		STACK_UNWIND(frame, -1, EBADFD, NULL);
+		return 0;
+	}
+
+	if (cmd == F_GETLK || cmd == F_GETLK64)
+		gf_cmd = GF_LK_GETLK;
+	else if (cmd == F_SETLK || cmd == F_SETLK64)
+		gf_cmd = GF_LK_SETLK;
+	else if (cmd == F_SETLKW || cmd == F_SETLKW64)
+		gf_cmd = GF_LK_SETLKW;
+	else {
+		gf_log (this->name, GF_LOG_ERROR,
+			"Unknown cmd (%d)!", gf_cmd);
+		goto unwind;
+	}
+
+	switch (flock->l_type) {
+	case F_RDLCK:
+		gf_type = GF_LK_F_RDLCK;
+		break;
+	case F_WRLCK:
+		gf_type = GF_LK_F_WRLCK;
+		break;
+	case F_UNLCK:
+		gf_type = GF_LK_F_UNLCK;
+		break;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->fd   = hton64 (remote_fd);
+	req->cmd  = hton32 (gf_cmd);
+	req->type = hton32 (gf_type);
+	gf_flock_from_flock (&req->flock, flock);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_LK,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+}
+
+
+/**
+ * client_inodelk - inodelk function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @inode: inode structure
+ * @cmd: lock command
+ * @lock: flock struct
+ *
+ * external reference through client_protocol_xlator->fops->inodelk
+ */
+int32_t
+client_inodelk (call_frame_t *frame,
+		xlator_t *this,
+		loc_t *loc,
+		int32_t cmd,
+		struct flock *flock)
+{
+	int ret = -1;
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_inodelk_req_t *req = NULL;
+	size_t hdrlen = 0;
+	int32_t gf_cmd = 0;
+	int32_t gf_type = 0;
+	ino_t   ino  = 0;
+	size_t  pathlen = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_inodelk_cbk,
+			    conf->child,
+			    conf->child->fops->inodelk,
+			    loc, cmd, flock);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	if (cmd == F_GETLK || cmd == F_GETLK64)
+		gf_cmd = GF_LK_GETLK;
+	else if (cmd == F_SETLK || cmd == F_SETLK64)
+		gf_cmd = GF_LK_SETLK;
+	else if (cmd == F_SETLKW || cmd == F_SETLKW64)
+		gf_cmd = GF_LK_SETLKW;
+	else {
+		gf_log (this->name, GF_LOG_ERROR,
+			"Unknown cmd (%d)!", gf_cmd);
+		goto unwind;
+	}
+
+	switch (flock->l_type) {
+	case F_RDLCK:
+		gf_type = GF_LK_F_RDLCK;
+		break;
+	case F_WRLCK:
+		gf_type = GF_LK_F_WRLCK;
+		break;
+	case F_UNLCK:
+		gf_type = GF_LK_F_UNLCK;
+		break;
+	}
+
+	hdrlen = gf_hdr_len (req, pathlen);
+	hdr    = gf_hdr_new (req, pathlen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	strcpy (req->path, loc->path);
+
+	req->ino  = hton64 (ino);
+
+	req->cmd  = hton32 (gf_cmd);
+	req->type = hton32 (gf_type);
+	gf_flock_from_flock (&req->flock, flock);
+
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST,
+				    GF_FOP_INODELK,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+
+	STACK_UNWIND(frame, -1, EINVAL);
+	return 0;
+
+}
+
+
+/**
+ * client_finodelk - finodelk function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @inode: inode structure
+ * @cmd: lock command
+ * @lock: flock struct
+ *
+ * external reference through client_protocol_xlator->fops->finodelk
+ */
+int32_t
+client_finodelk (call_frame_t *frame,
+		 xlator_t *this,
+		 fd_t *fd,
+		 int32_t cmd,
+		 struct flock *flock)
+{
+	int ret = -1;
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_finodelk_req_t *req = NULL;
+	size_t hdrlen = 0;
+	int32_t gf_cmd = 0;
+	int32_t gf_type = 0;
+	int64_t remote_fd = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_finodelk_cbk,
+			    conf->child,
+			    conf->child->fops->finodelk,
+			    fd, cmd, flock);
+		
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD", 
+			fd->inode->ino);
+		STACK_UNWIND(frame, -1, EBADFD);
+		return 0;
+	}
+
+	if (cmd == F_GETLK || cmd == F_GETLK64)
+		gf_cmd = GF_LK_GETLK;
+	else if (cmd == F_SETLK || cmd == F_SETLK64)
+		gf_cmd = GF_LK_SETLK;
+	else if (cmd == F_SETLKW || cmd == F_SETLKW64)
+		gf_cmd = GF_LK_SETLKW;
+	else {
+		gf_log (this->name, GF_LOG_ERROR,
+			"Unknown cmd (%d)!", gf_cmd);
+		goto unwind;
+	}
+
+	switch (flock->l_type) {
+	case F_RDLCK:
+		gf_type = GF_LK_F_RDLCK;
+		break;
+	case F_WRLCK:
+		gf_type = GF_LK_F_WRLCK;
+		break;
+	case F_UNLCK:
+		gf_type = GF_LK_F_UNLCK;
+		break;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->fd = hton64 (remote_fd);
+
+	req->cmd  = hton32 (gf_cmd);
+	req->type = hton32 (gf_type);
+	gf_flock_from_flock (&req->flock, flock);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST,
+				    GF_FOP_FINODELK,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+
+	STACK_UNWIND(frame, -1, EINVAL);
+	return 0;
+}
+
+
+int32_t
+client_entrylk (call_frame_t *frame,
+		xlator_t *this,
+		loc_t *loc,
+		const char *name,
+		entrylk_cmd cmd,
+		entrylk_type type)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_entrylk_req_t *req = NULL;
+	size_t pathlen = 0;
+	size_t hdrlen = -1;
+	int ret = -1;
+	ino_t ino = 0;
+	size_t namelen = 0;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame, default_entrylk_cbk,
+			    conf->child,
+			    conf->child->fops->entrylk,
+			    loc, name, cmd, type);
+		
+		return 0;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	if (name)
+		namelen = STRLEN_0(name);
+
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+
+	hdrlen = gf_hdr_len (req, pathlen + namelen);
+	hdr    = gf_hdr_new (req, pathlen + namelen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino  = hton64 (ino);
+	req->namelen = hton64 (namelen);
+
+	strcpy (req->path, loc->path);
+	if (name)
+		strcpy (req->name + pathlen, name);
+
+	req->cmd  = hton32 (cmd);
+	req->type = hton32 (type);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_ENTRYLK,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+
+	STACK_UNWIND(frame, -1, EINVAL);
+	return 0;
+
+}
+
+
+int32_t
+client_fentrylk (call_frame_t *frame,
+		 xlator_t *this,
+		 fd_t *fd,
+		 const char *name,
+		 entrylk_cmd cmd,
+		 entrylk_type type)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_fentrylk_req_t *req = NULL;
+	int64_t remote_fd = -1;
+	size_t namelen = 0;
+	size_t hdrlen = -1;
+	int ret = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame, default_fentrylk_cbk,
+			    conf->child,
+			    conf->child->fops->fentrylk,
+			    fd, name, cmd, type);
+		
+		return 0;
+	}
+
+	if (name)
+		namelen = STRLEN_0(name);
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD", 
+			fd->inode->ino);
+		STACK_UNWIND(frame, -1, EBADFD);
+		return 0;
+	}
+
+	hdrlen = gf_hdr_len (req, namelen);
+	hdr    = gf_hdr_new (req, namelen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->fd = hton64 (remote_fd);
+	req->namelen = hton64 (namelen);
+
+	if (name)
+		strcpy (req->name, name);
+
+	req->cmd  = hton32 (cmd);
+	req->type = hton32 (type);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_FENTRYLK,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+
+	STACK_UNWIND(frame, -1, EINVAL);
+	return 0;
+}
+
+
+/*
+ * client_lookup - lookup function for client protocol
+ * @frame: call frame
+ * @this:
+ * @loc: location
+ *
+ * not for external reference
+ */
+int32_t
+client_lookup (call_frame_t *frame,
+               xlator_t *this,
+               loc_t *loc,
+               dict_t *xattr_req)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_lookup_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int    ret = -1;
+	ino_t  ino = 0;
+	ino_t  par = 0;
+	size_t dictlen = 0;
+	size_t pathlen = 0;
+	size_t baselen = 0;
+	int32_t op_ret = -1;
+	int32_t op_errno = EINVAL;
+	client_conf_t *conf = this->private;
+	client_local_t *local = NULL;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_lookup_cbk,
+			    conf->child,
+			    conf->child->fops->lookup,
+			    loc,
+			    xattr_req);
+		
+		return 0;
+	}
+
+	local = calloc (1, sizeof (*local));
+	GF_VALIDATE_OR_GOTO(this->name, local, unwind);
+
+	loc_copy (&local->loc, loc);
+
+	frame->local = local;
+
+	GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
+	GF_VALIDATE_OR_GOTO (this->name, loc->path, unwind);
+
+	if (loc->ino != 1) {
+		par = this_ino_get (loc, this, GF_CLIENT_INODE_PARENT);
+		GF_VALIDATE_OR_GOTO (this->name, loc->name, unwind);
+		baselen = STRLEN_0(loc->name);
+	} else {
+		ino = 1;
+	}
+
+	pathlen = STRLEN_0(loc->path);
+	
+	if (xattr_req) {
+		dictlen = dict_serialized_length (xattr_req);
+		if (dictlen < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"failed to get serialized length of dict(%p)",
+				xattr_req);
+			ret = dictlen;
+			goto unwind;
+		}
+	}
+
+	hdrlen = gf_hdr_len (req, pathlen + baselen + dictlen);
+	hdr    = gf_hdr_new (req, pathlen + baselen + dictlen);
+	GF_VALIDATE_OR_GOTO (this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->ino   = hton64 (ino);
+	req->par   = hton64 (par);
+	strcpy (req->path, loc->path);
+	if (baselen)
+		strcpy (req->path + pathlen, loc->name);
+	
+	if (dictlen) {
+		ret = dict_serialize (xattr_req, req->dict + baselen + pathlen);
+		if (ret < 0) {
+			gf_log (this->name, GF_LOG_ERROR,
+				"failed to serialize dictionary(%p)",
+				xattr_req);
+			goto unwind;
+		}
+	}
+
+	req->dictlen = hton32 (dictlen);
+	
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_LOOKUP,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+
+unwind:
+	STACK_UNWIND (frame, op_ret, op_errno, loc->inode, NULL, NULL);
+	return ret;
+}
+
+
+
+/*
+ * client_fchmod
+ *
+ */
+int32_t
+client_fchmod (call_frame_t *frame,
+               xlator_t *this,
+               fd_t *fd,
+               mode_t mode)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_fchmod_req_t *req = NULL;
+	int64_t remote_fd = -1;
+	size_t hdrlen = -1;
+	int ret = -1;
+	int32_t op_errno = EINVAL;
+	int32_t op_ret   = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_fchmod_cbk,
+			    conf->child,
+			    conf->child->fops->fchmod,
+			    fd,
+			    mode);
+		
+		return 0;
+	}
+
+	GF_VALIDATE_OR_GOTO (this->name, fd, unwind);
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		op_errno = EBADFD;
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD", 
+			fd->inode->ino);
+		goto unwind;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO (this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->fd   = hton64 (remote_fd);
+	req->mode = hton32 (mode);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_FCHMOD,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+
+unwind:
+	STACK_UNWIND (frame, op_ret, op_errno, NULL);
+	return 0;
+}
+
+
+/*
+ * client_fchown -
+ *
+ * @frame:
+ * @this:
+ * @fd:
+ * @uid:
+ * @gid:
+ *
+ */
+int32_t
+client_fchown (call_frame_t *frame,
+               xlator_t *this,
+               fd_t *fd,
+               uid_t uid,
+               gid_t gid)
+{
+	gf_hdr_common_t     *hdr = NULL;
+	gf_fop_fchown_req_t *req = NULL;
+	int64_t remote_fd = 0;
+	size_t  hdrlen   = -1;
+	int32_t op_ret   = -1;
+	int32_t op_errno = EINVAL;
+	int32_t ret      = -1;
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_fchown_cbk,
+			    conf->child,
+			    conf->child->fops->fchown,
+			    fd,
+			    uid,
+			    gid);
+		
+		return 0;
+	}
+
+	GF_VALIDATE_OR_GOTO (this->name, fd, unwind);
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		op_errno = EBADFD;
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD", 
+			fd->inode->ino);
+		goto unwind;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO (this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->fd  = hton64 (remote_fd);
+	req->uid = hton32 (uid);
+	req->gid = hton32 (gid);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_LOWLAT),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_FCHOWN,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return 0;
+
+unwind:
+	STACK_UNWIND (frame, op_ret, op_errno, NULL);
+	return 0;
+
+}
+
+/**
+ * client_setdents -
+ */
+int32_t
+client_setdents (call_frame_t *frame,
+                 xlator_t *this,
+                 fd_t *fd,
+                 int32_t flags,
+                 dir_entry_t *entries,
+                 int32_t count)
+{
+	gf_hdr_common_t       *hdr = NULL;
+	gf_fop_setdents_req_t *req = NULL;
+	int64_t remote_fd = 0;
+	char   *buffer = NULL;
+	char *ptr = NULL;
+	data_t *buf_data = NULL;
+	dict_t *reply_dict = NULL;
+	dir_entry_t *trav = NULL;
+	uint32_t len = 0;
+	int32_t  buf_len = 0;
+	int32_t  ret = -1;
+	int32_t  op_ret = -1;
+	int32_t  op_errno = EINVAL;
+	int32_t  vec_count = 0;
+	size_t   hdrlen = -1;
+	struct iovec vector[1];
+	client_conf_t *conf = this->private;
+
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_setdents_cbk,
+			    conf->child,
+			    conf->child->fops->setdents,
+			    fd,
+			    flags,
+			    entries,
+			    count);
+		
+		return 0;
+	}
+
+	GF_VALIDATE_OR_GOTO (this->name, fd, unwind);
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd. returning EBADFD", 
+			fd->inode->ino);
+		op_errno = EBADFD;
+		goto unwind;
+	}
+
+	GF_VALIDATE_OR_GOTO (this->name, entries, unwind);
+	GF_VALIDATE_OR_GOTO (this->name, count, unwind);
+
+	trav = entries->next;
+	while (trav) {
+		len += strlen (trav->name);
+		len += 1;
+		len += strlen (trav->link);
+		len += 1;
+		len += 256; // max possible for statbuf;
+		trav = trav->next;
+	}
+	buffer = CALLOC (1, len);
+	GF_VALIDATE_OR_GOTO (this->name, buffer, unwind);
+
+	ptr = buffer;
+
+	trav = entries->next;
+	while (trav) {
+		int32_t this_len = 0;
+		char *tmp_buf = NULL;
+		struct stat *stbuf = &trav->buf;
+		{
+			/* Convert the stat buf to string */
+			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);
+		}
+		this_len = sprintf (ptr, "%s/%s%s\n",
+				    trav->name,
+				    tmp_buf,
+				    trav->link);
+
+		FREE (tmp_buf);
+		trav = trav->next;
+		ptr += this_len;
+	}
+	buf_len = strlen (buffer);
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO (this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->fd    = hton64 (remote_fd);
+	req->flags = hton32 (flags);
+	req->count = hton32 (count);
+
+	{
+		buf_data = get_new_data ();
+		GF_VALIDATE_OR_GOTO (this->name, buf_data, unwind);
+		reply_dict = get_new_dict();
+		GF_VALIDATE_OR_GOTO (this->name, reply_dict, unwind);
+
+		buf_data->data = buffer;
+		buf_data->len = buf_len;
+		dict_set (reply_dict, NULL, buf_data);
+		frame->root->rsp_refs = dict_ref (reply_dict);
+		vector[0].iov_base = buffer;
+		vector[0].iov_len = buf_len;
+		vec_count = 1;
+	}
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_SETDENTS,
+				    hdr, hdrlen, vector, vec_count, 
+				    frame->root->rsp_refs);
+
+	return ret;
+unwind:
+	STACK_UNWIND (frame, op_ret, op_errno);
+	return 0;
+}
+
+
+/*
+ * CBKs
+ */
+/*
+ * client_forget - forget function for client protocol
+ * @this:
+ * @inode:
+ *
+ * not for external reference
+ */
+int32_t
+client_forget (xlator_t *this,
+               inode_t *inode)
+{
+	ino_t            ino = 0;
+	client_conf_t *conf = NULL;
+	client_forget_t  forget = {0,};
+	uint8_t          send_forget = 0;
+	int32_t          ret = -1;
+
+	GF_VALIDATE_OR_GOTO ("client", this, out);
+	conf = this->private;
+
+	if (conf->child) {
+		/* */
+		/* Yenu beda */
+		return 0;
+	}
+
+	GF_VALIDATE_OR_GOTO (this->name, inode, out);
+	ino = this_ino_get_from_inode (inode, this);
+
+	LOCK (&conf->forget.lock);
+	{
+		conf->forget.ino_array[conf->forget.count++] = ino;
+
+		if ((!conf->forget.frames_in_transit) || 
+		    (conf->forget.count >= CLIENT_PROTO_FORGET_LIMIT)) {
+			ret = client_get_forgets (this, &forget);
+			if (ret <= 0)
+				send_forget = 0;
+			else
+				send_forget = 1;
+		}
+	}
+	UNLOCK (&conf->forget.lock);
+	
+	if (send_forget) {
+		ret = protocol_client_xfer (forget.frame, this,
+					    CLIENT_CHANNEL (this,CHANNEL_BULK),
+					    GF_OP_TYPE_CBK_REQUEST, 
+					    GF_CBK_FORGET,
+					    forget.hdr, forget.hdrlen, 
+					    NULL, 0, NULL);
+	}
+out:
+	return 0;
+}
+
+/**
+ * client_releasedir - releasedir function for client protocol
+ * @this: this translator structure
+ * @fd: file descriptor structure
+ *
+ * external reference through client_protocol_xlator->cbks->releasedir
+ */
+
+int32_t
+client_releasedir (xlator_t *this, fd_t *fd)
+{
+	call_frame_t            *fr = NULL;
+	int32_t                  ret = -1;
+	int64_t                  remote_fd = 0;
+	char                     key[32] = {0,};
+	gf_hdr_common_t         *hdr = NULL;
+	size_t                   hdrlen = 0;
+	gf_cbk_releasedir_req_t *req  = NULL;
+	client_conf_t           *conf = NULL;
+
+
+	GF_VALIDATE_OR_GOTO ("client", this, out);
+	GF_VALIDATE_OR_GOTO (this->name, fd, out);
+
+	conf = this->private;
+	if (conf->child) {
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1){
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd.", 
+			fd->inode->ino);
+		goto out;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO (this->name, hdr, out);
+
+	req    = gf_param (hdr);
+
+	req->fd = hton64 (remote_fd);
+
+	{
+		sprintf (key, "%p", fd);
+
+		pthread_mutex_lock (&conf->mutex);
+		{
+			dict_del (conf->saved_fds, key);
+		}
+		pthread_mutex_unlock (&conf->mutex);
+	}
+
+	fr = create_frame (this, this->ctx->pool);
+	GF_VALIDATE_OR_GOTO (this->name, fr, out);
+
+	ret = protocol_client_xfer (fr, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_CBK_REQUEST, GF_CBK_RELEASEDIR,
+				    hdr, hdrlen, NULL, 0, NULL);
+out:
+	return ret;
+}
+
+
+/**
+ * client_release - release function for client protocol
+ * @this: this translator structure
+ * @fd: file descriptor structure
+ *
+ * external reference through client_protocol_xlator->cbks->release
+ *
+ */
+int
+client_release (xlator_t *this, fd_t *fd)
+{
+	call_frame_t          *fr = NULL;
+	int32_t                ret = -1;
+	int64_t                remote_fd = 0;
+	char                   key[32] = {0,};
+	gf_hdr_common_t       *hdr = NULL;
+	size_t                 hdrlen = 0;
+	gf_cbk_release_req_t  *req = NULL;
+	client_conf_t         *conf = NULL;
+
+	GF_VALIDATE_OR_GOTO ("client", this, out);
+	GF_VALIDATE_OR_GOTO (this->name, fd, out);
+
+	conf = this->private;
+
+	if (conf->child) {
+		return 0;
+	}
+
+	ret = this_fd_get (fd, this, &remote_fd);
+	if (ret == -1) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"(%"PRId64"): failed to get remote fd.", 
+			fd->inode->ino);
+		goto out;
+	}
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO (this->name, hdr, out);
+	req    = gf_param (hdr);
+
+	req->fd = hton64 (remote_fd);
+
+	{
+		sprintf (key, "%p", fd);
+
+		pthread_mutex_lock (&conf->mutex);
+		{
+			dict_del (conf->saved_fds, key);
+		}
+		pthread_mutex_unlock (&conf->mutex);
+	}
+
+	fr = create_frame (this, this->ctx->pool);
+	GF_VALIDATE_OR_GOTO (this->name, fr, out);
+
+	ret = protocol_client_xfer (fr, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_CBK_REQUEST, GF_CBK_RELEASE,
+				    hdr, hdrlen, NULL, 0, NULL);
+out:
+	return ret;
+}
+
+/*
+ * MGMT_OPS
+ */
+
+/**
+ * client_stats - stats function for client protocol
+ * @frame: call frame
+ * @this: this translator structure
+ * @flags:
+ *
+ * external reference through client_protocol_xlator->mops->stats
+ */
+
+int32_t
+client_stats (call_frame_t *frame,
+              xlator_t *this,
+              int32_t flags)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_mop_stats_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int ret = -1;
+	client_conf_t *conf = NULL;
+
+	GF_VALIDATE_OR_GOTO ("client", this, unwind);
+
+	conf = this->private;
+	if (conf->child) {
+		/* */
+		STACK_WIND (frame,
+			    default_stats_cbk,
+			    conf->child,
+			    conf->child->mops->stats,
+			    flags);
+		
+		return 0;
+	}
+
+
+	hdrlen = gf_hdr_len (req, 0);
+	hdr    = gf_hdr_new (req, 0);
+	GF_VALIDATE_OR_GOTO (this->name, hdr, unwind);
+
+	req    = gf_param (hdr);
+
+	req->flags = hton32 (flags);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_MOP_REQUEST, GF_MOP_STATS,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	STACK_UNWIND (frame, -1, EINVAL, NULL);
+	return 0;
+}
+
+
+/* Callbacks */
+
+int32_t
+client_fxattrop_cbk (call_frame_t *frame,
+		     gf_hdr_common_t *hdr, size_t hdrlen,
+		     char *buf, size_t buflen)
+{
+	gf_fop_xattrop_rsp_t *rsp = NULL;
+	int32_t op_ret   = 0;
+	int32_t gf_errno = 0;
+	int32_t op_errno = 0;
+	int32_t dict_len = 0;
+	dict_t *dict = NULL;
+	int32_t ret = -1;
+	char *dictbuf = NULL;
+
+	rsp = gf_param (hdr);
+	GF_VALIDATE_OR_GOTO(frame->this->name, rsp, fail);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+
+	if (op_ret >= 0) {
+		op_ret = -1;
+		dict_len = ntoh32 (rsp->dict_len);
+
+		if (dict_len > 0) {
+			dictbuf = memdup (rsp->dict, dict_len);
+			GF_VALIDATE_OR_GOTO(frame->this->name, dictbuf, fail);
+
+			dict = dict_new();
+			GF_VALIDATE_OR_GOTO(frame->this->name, dict, fail);
+
+			ret = dict_unserialize (dictbuf, dict_len, &dict);
+			if (ret < 0) {
+				gf_log (frame->this->name, GF_LOG_ERROR,
+					"failed to serialize dictionary(%p)",
+					dict);
+				op_errno = -ret;
+				goto fail;
+			} else {
+				dict->extra_free = dictbuf;
+				dictbuf = NULL;
+			}
+		}
+		op_ret = 0;
+	}
+	gf_errno = ntoh32 (hdr->rsp.op_errno);
+	op_errno = gf_error_to_errno (gf_errno);
+
+fail:
+	STACK_UNWIND (frame, op_ret, op_errno, dict);
+	
+	if (dictbuf)
+		free (dictbuf);
+
+	if (dict)
+		dict_unref (dict);
+
+	return 0;
+}
+
+int32_t
+client_xattrop_cbk (call_frame_t *frame,
+		    gf_hdr_common_t *hdr, size_t hdrlen,
+		    char *buf, size_t buflen)
+{
+	gf_fop_xattrop_rsp_t *rsp = NULL;
+	int32_t op_ret   = -1;
+	int32_t gf_errno = EINVAL;
+	int32_t op_errno = 0;
+	int32_t dict_len = 0;
+	dict_t *dict = NULL;
+	int32_t ret = -1;
+	char *dictbuf = NULL;
+
+	rsp = gf_param (hdr);
+	GF_VALIDATE_OR_GOTO(frame->this->name, rsp, fail);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	if (op_ret >= 0) {
+		op_ret = -1;
+		dict_len = ntoh32 (rsp->dict_len);
+
+		if (dict_len > 0) {
+			dictbuf = memdup (rsp->dict, dict_len);
+			GF_VALIDATE_OR_GOTO(frame->this->name, dictbuf, fail);
+
+			dict = get_new_dict();
+			GF_VALIDATE_OR_GOTO(frame->this->name, dict, fail);
+			dict_ref (dict);
+                                               
+			ret = dict_unserialize (dictbuf, dict_len, &dict);
+			if (ret < 0) {
+				gf_log (frame->this->name, GF_LOG_ERROR,
+					"failed to serialize dictionary(%p)",
+					dict);
+				goto fail;
+			} else {
+				dict->extra_free = dictbuf;
+				dictbuf = NULL;
+			}
+		}
+		op_ret = 0;
+	}
+	gf_errno = ntoh32 (hdr->rsp.op_errno);
+	op_errno = gf_error_to_errno (gf_errno);
+
+
+fail:
+	STACK_UNWIND (frame, op_ret, op_errno, dict);
+	
+	if (dictbuf)
+		free (dictbuf);
+	if (dict)
+		dict_unref (dict);
+
+	return 0;
+}
+
+/*
+ * client_chown_cbk -
+ *
+ * @frame:
+ * @args:
+ *
+ * not for external reference
+ */
+int32_t
+client_fchown_cbk (call_frame_t *frame,
+                   gf_hdr_common_t *hdr, size_t hdrlen,
+                   char *buf, size_t buflen)
+{
+	struct stat stbuf = {0, };
+	gf_fop_fchown_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret == 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+
+/*
+ * client_fchmod_cbk
+ *
+ * @frame:
+ * @args:
+ *
+ * not for external reference
+ */
+int32_t
+client_fchmod_cbk (call_frame_t *frame,
+                   gf_hdr_common_t *hdr, size_t hdrlen,
+                   char *buf, size_t buflen)
+{
+	struct stat stbuf = {0, };
+	gf_fop_fchmod_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret == 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+
+/*
+ * client_create_cbk - create callback function for client protocol
+ * @frame: call frame
+ * @args: arguments in dictionary
+ *
+ * not for external reference
+ */
+
+int
+client_create_cbk (call_frame_t *frame,
+                   gf_hdr_common_t *hdr, size_t hdrlen,
+                   char *buf, size_t buflen)
+{
+	gf_fop_create_rsp_t  *rsp = NULL;
+	int32_t               op_ret = 0;
+	int32_t               op_errno = 0;
+	fd_t                 *fd = NULL;
+	inode_t              *inode = NULL;
+	struct stat           stbuf = {0, };
+	int64_t               remote_fd = 0;
+	char                  key[32] = {0, };
+	int32_t               ret = -1;
+	client_local_t       *local = NULL;
+	client_conf_t        *conf = NULL;
+
+
+	local = frame->local; frame->local = NULL;
+	conf  = frame->this->private;
+	fd    = local->fd;
+	inode = local->loc.inode;
+
+	rsp = gf_param (hdr);
+
+	op_ret    = ntoh32 (hdr->rsp.op_ret);
+	op_errno  = ntoh32 (hdr->rsp.op_errno);
+
+	if (op_ret >= 0) {
+		remote_fd = ntoh64 (rsp->fd);
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+	}
+
+	if (op_ret >= 0) {
+		this_ino_set (&local->loc, frame->this, stbuf.st_ino);
+		this_fd_set (fd, frame->this, &local->loc, remote_fd);
+
+		sprintf (key, "%p", fd);
+
+		pthread_mutex_lock (&conf->mutex);
+		{
+			ret = dict_set_str (conf->saved_fds, key, "");
+		}
+		pthread_mutex_unlock (&conf->mutex);
+
+		if (ret < 0) {
+			free (key);
+			gf_log (frame->this->name, GF_LOG_ERROR,
+				"%s (%"PRId64"): failed to save remote fd", 
+				local->loc.path, stbuf.st_ino);
+		}
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, fd, inode, &stbuf);
+	
+	client_local_wipe (local);
+
+	return 0;
+}
+
+
+/*
+ * client_open_cbk - open callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_open_cbk (call_frame_t *frame,
+                 gf_hdr_common_t *hdr, size_t hdrlen,
+                 char *buf, size_t buflen)
+{
+	int32_t              op_ret = -1;
+	int32_t              op_errno = ENOTCONN;
+	fd_t                *fd = NULL;
+	int64_t              remote_fd = 0;
+	gf_fop_open_rsp_t   *rsp = NULL;
+	char                 key[32] = {0,};
+	int32_t              ret = -1;
+	client_local_t      *local = NULL;
+	client_conf_t       *conf = NULL;
+	
+
+	local = frame->local; frame->local = NULL;
+	conf  = frame->this->private;
+	fd    = local->fd;
+
+	rsp = gf_param (hdr);
+
+	op_ret    = ntoh32 (hdr->rsp.op_ret);
+	op_errno  = ntoh32 (hdr->rsp.op_errno);
+
+	if (op_ret >= 0) {
+		remote_fd = ntoh64 (rsp->fd);
+	}
+
+	if (op_ret >= 0) {
+		this_fd_set (fd, frame->this, &local->loc, remote_fd);
+
+		sprintf (key, "%p", fd);
+
+		pthread_mutex_lock (&conf->mutex);
+		{
+			ret = dict_set_str (conf->saved_fds, key, "");
+		}
+		pthread_mutex_unlock (&conf->mutex);
+
+		if (ret < 0) {
+			gf_log (frame->this->name, GF_LOG_ERROR,
+				"%s (%"PRId64"): failed to save remote fd", 
+				local->loc.path, local->loc.inode->ino);
+			free (key);
+		}
+
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, fd);
+	
+	client_local_wipe (local);
+
+	return 0;
+}
+
+/*
+ * client_stat_cbk - stat callback for client protocol
+ * @frame: call frame
+ * @args: arguments dictionary
+ *
+ * not for external reference
+ */
+int
+client_stat_cbk (call_frame_t *frame,
+                 gf_hdr_common_t *hdr, size_t hdrlen,
+                 char *buf, size_t buflen)
+{
+	struct stat        stbuf = {0, };
+	gf_fop_stat_rsp_t *rsp = NULL;
+	int32_t            op_ret = 0;
+	int32_t            op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret == 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+/*
+ * client_utimens_cbk - utimens callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+
+int32_t
+client_utimens_cbk (call_frame_t *frame,
+                    gf_hdr_common_t *hdr, size_t hdrlen,
+                    char *buf, size_t buflen)
+{
+	struct stat stbuf = {0, };
+	gf_fop_utimens_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret == 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+/*
+ * client_chmod_cbk - chmod for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_chmod_cbk (call_frame_t *frame,
+                  gf_hdr_common_t *hdr, size_t hdrlen,
+                  char *buf, size_t buflen)
+{
+	struct stat stbuf = {0, };
+	gf_fop_chmod_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret == 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+/*
+ * client_chown_cbk - chown for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_chown_cbk (call_frame_t *frame,
+                  gf_hdr_common_t *hdr, size_t hdrlen,
+                  char *buf, size_t buflen)
+{
+	struct stat stbuf = {0, };
+	gf_fop_chown_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret == 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+/*
+ * client_mknod_cbk - mknod callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_mknod_cbk (call_frame_t *frame,
+                  gf_hdr_common_t *hdr, size_t hdrlen,
+                  char *buf, size_t buflen)
+{
+	gf_fop_mknod_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+	struct stat stbuf = {0, };
+	inode_t *inode = NULL;
+	client_local_t *local = NULL;
+
+	local = frame->local;
+	frame->local = NULL;
+	inode = local->loc.inode;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret >= 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+		this_ino_set (&local->loc, frame->this, stbuf.st_ino);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, inode, &stbuf);
+	
+	client_local_wipe (local);
+
+	return 0;
+}
+
+/*
+ * client_symlink_cbk - symlink callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_symlink_cbk (call_frame_t *frame,
+                    gf_hdr_common_t *hdr, size_t hdrlen,
+                    char *buf, size_t buflen)
+{
+	gf_fop_symlink_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+	struct stat stbuf = {0, };
+	inode_t *inode = NULL;
+	client_local_t *local = NULL;
+
+	local = frame->local;
+	frame->local = NULL;
+	inode = local->loc.inode;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret >= 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+		this_ino_set (&local->loc, frame->this, stbuf.st_ino);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, inode, &stbuf);
+	
+	client_local_wipe (local);
+
+	return 0;
+}
+
+/*
+ * client_link_cbk - link callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_link_cbk (call_frame_t *frame,
+                 gf_hdr_common_t *hdr, size_t hdrlen,
+                 char *buf, size_t buflen)
+{
+	gf_fop_link_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+	struct stat stbuf = {0, };
+	inode_t *inode = NULL;
+	client_local_t *local = NULL;
+
+	local = frame->local;
+	frame->local = NULL;
+	inode = local->loc.inode;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret >= 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, inode, &stbuf);
+	
+	client_local_wipe (local);
+
+	return 0;
+}
+
+/*
+ * client_truncate_cbk - truncate callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+
+int32_t
+client_truncate_cbk (call_frame_t *frame,
+                     gf_hdr_common_t *hdr, size_t hdrlen,
+                     char *buf, size_t buflen)
+{
+	struct stat stbuf = {0, };
+	gf_fop_truncate_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret == 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+/* client_fstat_cbk - fstat callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+
+int32_t
+client_fstat_cbk (call_frame_t *frame,
+                  gf_hdr_common_t *hdr, size_t hdrlen,
+                  char *buf, size_t buflen)
+{
+	struct stat stbuf = {0, };
+	gf_fop_fstat_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret == 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+/*
+ * client_ftruncate_cbk - ftruncate callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_ftruncate_cbk (call_frame_t *frame,
+                      gf_hdr_common_t *hdr, size_t hdrlen,
+                      char *buf, size_t buflen)
+{
+	struct stat stbuf = {0, };
+	gf_fop_ftruncate_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret == 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+/* client_readv_cbk - readv callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external referece
+ */
+
+int32_t
+client_readv_cbk (call_frame_t *frame,
+                  gf_hdr_common_t *hdr, size_t hdrlen,
+                  char *buf, size_t buflen)
+{
+	gf_fop_read_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+	struct iovec vector = {0, };
+	struct stat stbuf = {0, };
+	dict_t *refs = NULL;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret != -1) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+		vector.iov_base = buf;
+		vector.iov_len  = buflen;
+
+		refs = get_new_dict ();
+		dict_set (refs, NULL, data_from_dynptr (buf, 0));
+		frame->root->rsp_refs = dict_ref (refs);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &vector, 1, &stbuf);
+
+	if (refs)
+		dict_unref (refs);
+
+	return 0;
+}
+
+/*
+ * client_write_cbk - write callback for client protocol
+ * @frame: cal frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+
+int32_t
+client_write_cbk (call_frame_t *frame,
+                  gf_hdr_common_t *hdr, size_t hdrlen,
+                  char *buf, size_t buflen)
+{
+	gf_fop_write_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+	struct stat stbuf = {0, };
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret >= 0)
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+
+int32_t
+client_readdir_cbk (call_frame_t *frame,
+                    gf_hdr_common_t *hdr, size_t hdrlen,
+                    char *buf, size_t buflen)
+{
+	gf_fop_readdir_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+	uint32_t buf_size = 0;
+	gf_dirent_t entries;
+
+	rsp = gf_param (hdr);
+
+	op_ret    = ntoh32 (hdr->rsp.op_ret);
+	op_errno  = ntoh32 (hdr->rsp.op_errno);
+
+	INIT_LIST_HEAD (&entries.list);
+	if (op_ret > 0) {
+		buf_size = ntoh32 (rsp->size);
+		gf_dirent_unserialize (&entries, rsp->buf, buf_size);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &entries);
+
+	gf_dirent_free (&entries);
+
+	return 0;
+}
+
+/*
+ * client_fsync_cbk - fsync callback for client protocol
+ *
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_fsync_cbk (call_frame_t *frame,
+                  gf_hdr_common_t *hdr, size_t hdrlen,
+                  char *buf, size_t buflen)
+{
+	struct stat stbuf = {0, };
+	gf_fop_fsync_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+
+/*
+ * client_unlink_cbk - unlink callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_unlink_cbk (call_frame_t *frame,
+                   gf_hdr_common_t *hdr, size_t hdrlen,
+                   char *buf, size_t buflen)
+{
+	gf_fop_unlink_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+
+	return 0;
+}
+
+/*
+ * client_rename_cbk - rename callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_rename_cbk (call_frame_t *frame,
+                   gf_hdr_common_t *hdr, size_t hdrlen,
+                   char *buf, size_t buflen)
+{
+	struct stat stbuf = {0, };
+	gf_fop_rename_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret == 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+
+/*
+ * client_readlink_cbk - readlink callback for client protocol
+ *
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_readlink_cbk (call_frame_t *frame,
+                     gf_hdr_common_t *hdr, size_t hdrlen,
+                     char *buf, size_t buflen)
+{
+	gf_fop_readlink_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+	char *link = NULL;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret > 0) {
+		link = rsp->path;
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, link);
+	return 0;
+}
+
+/*
+ * client_mkdir_cbk - mkdir callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_mkdir_cbk (call_frame_t *frame,
+                  gf_hdr_common_t *hdr, size_t hdrlen,
+                  char *buf, size_t buflen)
+{
+	gf_fop_mkdir_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+	struct stat stbuf = {0, };
+	inode_t *inode = NULL;
+	client_local_t *local = NULL;
+
+	local = frame->local;
+	inode = local->loc.inode;
+	frame->local = NULL;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret >= 0) {
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+		this_ino_set (&local->loc, frame->this, stbuf.st_ino);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, inode, &stbuf);
+	
+	client_local_wipe (local);
+
+	return 0;
+}
+
+/*
+ * client_flush_cbk - flush callback for client protocol
+ *
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+
+int32_t
+client_flush_cbk (call_frame_t *frame,
+                  gf_hdr_common_t *hdr, size_t hdrlen,
+                  char *buf, size_t buflen)
+{
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+
+	return 0;
+}
+
+
+/*
+ * client_opendir_cbk - opendir callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int
+client_opendir_cbk (call_frame_t *frame,
+                    gf_hdr_common_t *hdr, size_t hdrlen,
+                    char *buf, size_t buflen)
+{
+	int32_t               op_ret   = -1;
+	int32_t               op_errno = ENOTCONN;
+	fd_t                 *fd       = NULL;
+	int64_t               remote_fd = 0;
+	gf_fop_opendir_rsp_t *rsp       = NULL;
+	char                  key[32] = {0,};
+	int32_t               ret     = -1;
+	client_local_t       *local = NULL;
+	client_conf_t        *conf = NULL;
+
+
+	local = frame->local; frame->local = NULL;
+	conf  = frame->this->private;
+	fd    = local->fd;
+
+	rsp = gf_param (hdr);
+
+	op_ret    = ntoh32 (hdr->rsp.op_ret);
+	op_errno  = ntoh32 (hdr->rsp.op_errno);
+
+	if (op_ret >= 0) {
+		remote_fd = ntoh64 (rsp->fd);
+	}
+
+	if (op_ret >= 0) {
+		this_fd_set (fd, frame->this, &local->loc, remote_fd);
+
+		sprintf (key, "%p", fd);
+
+		pthread_mutex_lock (&conf->mutex);
+		{
+			ret = dict_set_str (conf->saved_fds, key, "");
+		}
+		pthread_mutex_unlock (&conf->mutex);
+
+		if (ret < 0) {
+			free (key);
+			gf_log (frame->this->name, GF_LOG_ERROR,
+				"%s (%"PRId64"): failed to save remote fd", 
+				local->loc.path, local->loc.inode->ino);
+		}
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, fd);
+	
+	client_local_wipe (local);
+
+	return 0;
+}
+
+
+/*
+ * client_rmdir_cbk - rmdir callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+
+int
+client_rmdir_cbk (call_frame_t *frame,
+                  gf_hdr_common_t *hdr, size_t hdrlen,
+                  char *buf, size_t buflen)
+{
+	gf_fop_rmdir_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+
+	return 0;
+}
+
+/*
+ * client_access_cbk - access callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_access_cbk (call_frame_t *frame,
+                   gf_hdr_common_t *hdr, size_t hdrlen,
+                   char *buf, size_t buflen)
+{
+	gf_fop_access_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+
+	return 0;
+}
+
+
+
+/*
+ * client_lookup_cbk - lookup callback for client protocol
+ *
+ * @frame: call frame
+ * @args: arguments dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_lookup_cbk (call_frame_t *frame,
+                   gf_hdr_common_t *hdr, size_t hdrlen,
+                   char *buf, size_t buflen)
+{
+	struct stat stbuf = {0, };
+	inode_t *inode = NULL;
+	dict_t *xattr = NULL;
+	gf_fop_lookup_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+	size_t dict_len = 0;
+	char *dictbuf = NULL;
+	int32_t ret = -1;
+	int32_t gf_errno = 0;
+	client_local_t *local = NULL;
+
+	local = frame->local; 
+	inode = local->loc.inode;
+	frame->local = NULL;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+
+	if (op_ret == 0) {
+		op_ret = -1;
+		gf_stat_to_stat (&rsp->stat, &stbuf);
+		this_ino_set (&local->loc, frame->this, stbuf.st_ino);
+
+		dict_len = ntoh32 (rsp->dict_len);
+
+		if (dict_len > 0) {
+			dictbuf = memdup (rsp->dict, dict_len);
+			GF_VALIDATE_OR_GOTO(frame->this->name, dictbuf, fail);
+			
+			xattr = dict_new();
+			GF_VALIDATE_OR_GOTO(frame->this->name, xattr, fail);
+
+			ret = dict_unserialize (dictbuf, dict_len, &xattr);
+			if (ret < 0) {
+				gf_log (frame->this->name, GF_LOG_ERROR,
+					"%s (%"PRId64"): failed to unserialize dictionary",
+					local->loc.path, inode->ino);
+				goto fail;
+			} else {
+				xattr->extra_free = dictbuf;
+				dictbuf = NULL;
+			}
+		}
+		op_ret = 0;
+	}
+	gf_errno = ntoh32 (hdr->rsp.op_errno);
+	op_errno = gf_error_to_errno (gf_errno);
+
+fail:
+	STACK_UNWIND (frame, op_ret, op_errno, inode, &stbuf, xattr);
+	
+	client_local_wipe (local);
+
+	if (dictbuf)
+		free (dictbuf);
+
+	if (xattr)
+		dict_unref (xattr);
+
+	return 0;
+}
+
+static dir_entry_t *
+gf_bin_to_direntry (char *buf, size_t count)
+{
+	int32_t idx = 0, bread = 0;
+	size_t rcount = 0;
+	char *ender = NULL, *buffer = NULL;
+	char tmp_buf[512] = {0,};
+	dir_entry_t *trav = NULL, *prev = NULL;
+	dir_entry_t *thead = NULL, *head = NULL;
+
+	thead = CALLOC (1, sizeof (dir_entry_t));
+	GF_VALIDATE_OR_GOTO("client-protocol", thead, fail);
+
+	buffer = buf;
+	prev = thead;
+
+	for (idx = 0; idx < count ; idx++) {
+		bread = 0;
+		trav = CALLOC (1, sizeof (dir_entry_t));
+		GF_VALIDATE_OR_GOTO("client-protocol", trav, fail);
+
+		ender = strchr (buffer, '/');
+		if (!ender)
+			break;
+		rcount = ender - buffer;
+		trav->name = CALLOC (1, rcount + 2);
+		GF_VALIDATE_OR_GOTO("client-protocol", trav->name, fail);
+
+		strncpy (trav->name, buffer, rcount);
+		bread = rcount + 1;
+		buffer += bread;
+
+		ender = strchr (buffer, '\n');
+		if (!ender)
+			break;
+		rcount = ender - buffer;
+		strncpy (tmp_buf, buffer, rcount);
+		bread = rcount + 1;
+		buffer += bread;
+			
+		gf_string_to_stat (tmp_buf, &trav->buf);
+
+		ender = strchr (buffer, '\n');
+		if (!ender)
+			break;
+		rcount = ender - buffer;
+		*ender = '\0';
+		if (S_ISLNK (trav->buf.st_mode))
+			trav->link = strdup (buffer);
+		else
+			trav->link = "";
+
+		bread = rcount + 1;
+		buffer += bread;
+
+		prev->next = trav;
+		prev = trav;
+	}
+	
+	head = thead;
+fail:
+	return head;
+}
+
+int32_t
+gf_free_direntry(dir_entry_t *head)
+{
+	dir_entry_t *prev = NULL, *trav = NULL;
+
+	prev = head;
+	GF_VALIDATE_OR_GOTO("client-protocol", prev, fail);
+
+	trav = head->next;
+	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 (head);
+fail:
+	return 0;
+}
+/*
+ * client_getdents_cbk - readdir callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_getdents_cbk (call_frame_t *frame,
+                     gf_hdr_common_t *hdr, size_t hdrlen,
+                     char *buf, size_t buflen)
+{
+	gf_fop_getdents_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+	int32_t gf_errno = 0;
+	int32_t nr_count = 0;
+	dir_entry_t *entry = NULL;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	gf_errno = ntoh32 (hdr->rsp.op_errno);
+	op_errno = gf_error_to_errno (gf_errno);
+
+	if (op_ret >= 0) {
+		nr_count = ntoh32 (rsp->count);		
+		entry = gf_bin_to_direntry(buf, nr_count);
+		if (entry == NULL) {
+			op_ret = -1;
+			op_errno = EINVAL;
+		}
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, entry, nr_count);
+
+	if (op_ret >= 0) {
+		/* Free the buffer */
+		FREE (buf);
+		gf_free_direntry(entry);
+      	}
+
+	return 0;
+}
+
+/*
+ * client_statfs_cbk - statfs callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_statfs_cbk (call_frame_t *frame,
+                   gf_hdr_common_t *hdr, size_t hdrlen,
+                   char *buf, size_t buflen)
+{
+	struct statvfs stbuf = {0, };
+	gf_fop_statfs_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret == 0)
+	{
+		gf_statfs_to_statfs (&rsp->statfs, &stbuf);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stbuf);
+
+	return 0;
+}
+
+/*
+ * client_fsyncdir_cbk - fsyncdir callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_fsyncdir_cbk (call_frame_t *frame,
+                     gf_hdr_common_t *hdr, size_t hdrlen,
+                     char *buf, size_t buflen)
+{
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+
+	return 0;
+}
+
+/*
+ * client_setxattr_cbk - setxattr callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_setxattr_cbk (call_frame_t *frame,
+                     gf_hdr_common_t *hdr, size_t hdrlen,
+                     char *buf, size_t buflen)
+{
+	gf_fop_setxattr_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+
+	return 0;
+}
+
+/*
+ * client_getxattr_cbk - getxattr callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_getxattr_cbk (call_frame_t *frame,
+                     gf_hdr_common_t *hdr, size_t hdrlen,
+                     char *buf, size_t buflen)
+{
+	gf_fop_getxattr_rsp_t *rsp = NULL;
+	int32_t op_ret   = 0;
+	int32_t gf_errno = 0;
+	int32_t op_errno = 0;
+	int32_t dict_len = 0;
+	dict_t *dict = NULL;
+	int32_t ret = -1;
+	char *dictbuf = NULL;
+	client_local_t *local = NULL;
+	
+	local = frame->local;
+	frame->local = NULL;
+
+	rsp = gf_param (hdr);
+	GF_VALIDATE_OR_GOTO(frame->this->name, rsp, fail);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+
+	if (op_ret >= 0) {
+		op_ret = -1;
+		dict_len = ntoh32 (rsp->dict_len);
+
+		if (dict_len > 0) {
+			dictbuf = memdup (rsp->dict, dict_len);
+			GF_VALIDATE_OR_GOTO(frame->this->name, dictbuf, fail);
+
+			dict = dict_new();
+			GF_VALIDATE_OR_GOTO(frame->this->name, dict, fail);
+
+			ret = dict_unserialize (dictbuf, dict_len, &dict);
+			if (ret < 0) {
+				gf_log (frame->this->name, GF_LOG_ERROR,
+					"%s (%"PRId64"): failed to "
+					"unserialize xattr dictionary", 
+					local->loc.path, local->loc.inode->ino);
+				goto fail;
+			} else {
+				dict->extra_free = dictbuf;
+				dictbuf = NULL;
+			}
+		}
+		op_ret = 0;
+	}
+	gf_errno = ntoh32 (hdr->rsp.op_errno);
+	op_errno = gf_error_to_errno (gf_errno);
+fail:
+	STACK_UNWIND (frame, op_ret, op_errno, dict);
+	
+	client_local_wipe (local);
+
+	if (dictbuf)
+		free (dictbuf);
+
+	if (dict)
+		dict_unref (dict);
+
+	return 0;
+}
+
+/*
+ * client_removexattr_cbk - removexattr callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_removexattr_cbk (call_frame_t *frame,
+                        gf_hdr_common_t *hdr, size_t hdrlen,
+                        char *buf, size_t buflen)
+{
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+
+	return 0;
+}
+
+/*
+ * client_lk_cbk - lk callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_lk_common_cbk (call_frame_t *frame,
+		      gf_hdr_common_t *hdr, size_t hdrlen,
+		      char *buf, size_t buflen)
+{
+	struct flock lock = {0,};
+	gf_fop_lk_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret >= 0) {
+		gf_flock_to_flock (&rsp->flock, &lock);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &lock);
+	return 0;
+}
+
+
+/*
+ * client_gf_file_lk_cbk - gf_file_lk callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_inodelk_cbk (call_frame_t *frame,
+		    gf_hdr_common_t *hdr, size_t hdrlen,
+		    char *buf, size_t buflen)
+{
+	gf_fop_inodelk_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+	return 0;
+}
+
+
+int32_t
+client_finodelk_cbk (call_frame_t *frame,
+		     gf_hdr_common_t *hdr, size_t hdrlen,
+		     char *buf, size_t buflen)
+{
+	gf_fop_finodelk_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+	return 0;
+}
+
+
+/*
+ * client_entrylk_cbk - entrylk callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int32_t
+client_entrylk_cbk (call_frame_t *frame,
+		    gf_hdr_common_t *hdr, size_t hdrlen,
+		    char *buf, size_t buflen)
+{
+	gf_fop_entrylk_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+	return 0;
+}
+
+int32_t
+client_fentrylk_cbk (call_frame_t *frame,
+		     gf_hdr_common_t *hdr, size_t hdrlen,
+		     char *buf, size_t buflen)
+{
+	gf_fop_fentrylk_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+	return 0;
+}
+
+
+/**
+ * client_writedir_cbk -
+ *
+ * @frame:
+ * @args:
+ *
+ * not for external reference
+ */
+int32_t
+client_setdents_cbk (call_frame_t *frame,
+                     gf_hdr_common_t *hdr, size_t hdrlen,
+                     char *buf, size_t buflen)
+{
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+
+	return 0;
+}
+
+
+
+/*
+ * client_stats_cbk - stats callback for client protocol
+ *
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+
+int32_t
+client_stats_cbk (call_frame_t *frame,
+                  gf_hdr_common_t *hdr, size_t hdrlen,
+                  char *buf, size_t buflen)
+{
+	struct xlator_stats stats = {0,};
+	gf_mop_stats_rsp_t *rsp = NULL;
+	char *buffer = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret >= 0)
+	{
+		buffer = rsp->buf;
+
+		sscanf (buffer, "%"SCNx64",%"SCNx64",%"SCNx64",%"SCNx64
+			",%"SCNx64",%"SCNx64",%"SCNx64",%"SCNx64"\n",
+			&stats.nr_files,
+			&stats.disk_usage,
+			&stats.free_disk,
+			&stats.total_disk_size,
+			&stats.read_usage,
+			&stats.write_usage,
+			&stats.disk_speed,
+			&stats.nr_clients);
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, &stats);
+	return 0;
+}
+
+/*
+ * client_getspec - getspec function for client protocol
+ * @frame: call frame
+ * @this: client protocol xlator structure
+ * @flag:
+ *
+ * external reference through client_protocol_xlator->fops->getspec
+ */
+int32_t
+client_getspec (call_frame_t *frame,
+                xlator_t *this,
+		const char *key,
+                int32_t flag)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_mop_getspec_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int keylen = 0;
+	int ret = -1;
+
+	if (key)
+		keylen = STRLEN_0(key);
+
+	hdrlen = gf_hdr_len (req, keylen);
+	hdr    = gf_hdr_new (req, keylen);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, unwind);
+
+	req        = gf_param (hdr);
+	req->flags = hton32 (flag);
+	req->keylen = hton32 (keylen);
+	if (keylen)
+		strcpy (req->key, key);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_MOP_REQUEST, GF_MOP_GETSPEC,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+unwind:
+	if (hdr)
+		free (hdr);
+	STACK_UNWIND(frame, -1, EINVAL, NULL);
+	return 0;
+}
+
+
+/*
+ * client_getspec_cbk - getspec callback for client protocol
+ *
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+
+int32_t
+client_getspec_cbk (call_frame_t *frame,
+                    gf_hdr_common_t *hdr, size_t hdrlen,
+                    char *buf, size_t buflen)
+{
+	gf_mop_getspec_rsp_t *rsp = NULL;
+	char *spec_data = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+	int32_t gf_errno = 0;
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	gf_errno = ntoh32 (hdr->rsp.op_errno);
+	op_errno = gf_error_to_errno (gf_errno);
+	rsp = gf_param (hdr);
+
+	if (op_ret >= 0) {
+		spec_data = rsp->spec;
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, spec_data);
+	return 0;
+}
+
+int32_t
+client_checksum (call_frame_t *frame,
+                 xlator_t *this,
+                 loc_t *loc,
+                 int32_t flag)
+{
+	gf_hdr_common_t *hdr = NULL;
+	gf_fop_checksum_req_t *req = NULL;
+	size_t hdrlen = -1;
+	int ret = -1;
+	client_conf_t *conf = this->private;
+	ino_t ino = 0;
+
+	if (conf->child) {
+		STACK_WIND (frame,
+			    default_checksum_cbk,
+			    conf->child,
+			    conf->child->fops->checksum,
+			    loc,
+			    flag);
+
+		return 0;
+	}
+
+	hdrlen = gf_hdr_len (req, strlen (loc->path) + 1);
+	hdr    = gf_hdr_new (req, strlen (loc->path) + 1);
+	req    = gf_param (hdr);
+	
+	ino = this_ino_get (loc, this, GF_CLIENT_INODE_SELF);
+	req->ino  = hton64 (ino);
+	req->flag = hton32 (flag);
+	strcpy (req->path, loc->path);
+
+	ret = protocol_client_xfer (frame, this,
+				    CLIENT_CHANNEL (this, CHANNEL_BULK),
+				    GF_OP_TYPE_FOP_REQUEST, GF_FOP_CHECKSUM,
+				    hdr, hdrlen, NULL, 0, NULL);
+
+	return ret;
+}
+
+int32_t
+client_checksum_cbk (call_frame_t *frame,
+                     gf_hdr_common_t *hdr, size_t hdrlen,
+                     char *buf, size_t buflen)
+{
+	gf_fop_checksum_rsp_t *rsp = NULL;
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+	int32_t gf_errno = 0;
+	unsigned char *fchecksum = NULL;
+	unsigned char *dchecksum = NULL;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	gf_errno = ntoh32 (hdr->rsp.op_errno);
+	op_errno = gf_error_to_errno (gf_errno);
+
+	if (op_ret >= 0) {
+		fchecksum = rsp->fchecksum;
+		dchecksum = rsp->dchecksum + ZR_FILENAME_MAX;
+	}
+
+	STACK_UNWIND (frame, op_ret, op_errno, fchecksum, dchecksum);
+	return 0;
+}
+
+
+/*
+ * client_setspec_cbk - setspec callback for client protocol
+ * @frame: call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+
+int32_t
+client_setspec_cbk (call_frame_t *frame,
+                    gf_hdr_common_t *hdr, size_t hdrlen,
+                    char *buf, size_t buflen)
+{
+	int32_t op_ret = 0;
+	int32_t op_errno = 0;
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	STACK_UNWIND (frame, op_ret, op_errno);
+
+	return 0;
+}
+
+/*
+ * client_setvolume_cbk - setvolume callback for client protocol
+ * @frame:  call frame
+ * @args: argument dictionary
+ *
+ * not for external reference
+ */
+int
+client_setvolume_cbk (call_frame_t *frame,
+                      gf_hdr_common_t *hdr, size_t hdrlen,
+                      char *buf, size_t buflen)
+{
+	gf_mop_setvolume_rsp_t *rsp = NULL;
+	client_connection_t    *conn = NULL;
+	client_conf_t          *conf = NULL;
+	glusterfs_ctx_t        *ctx = NULL; 
+	xlator_t               *this = NULL;
+	xlator_list_t          *parent = NULL;
+	transport_t            *trans = NULL;
+	dict_t                 *reply = NULL;
+	char                   *remote_subvol = NULL;
+	char                   *remote_error = NULL;
+	char                   *process_uuid = NULL;
+	int32_t                 ret = -1;
+	int32_t                 op_ret   = -1;
+	int32_t                 op_errno = EINVAL;
+	int32_t                 dict_len = 0;
+
+
+	trans = frame->local; frame->local = NULL;
+	this  = frame->this;
+	conf  = this->private;
+	conn  = trans->xl_private;
+
+	rsp = gf_param (hdr);
+
+	op_ret   = ntoh32 (hdr->rsp.op_ret);
+	op_errno = gf_error_to_errno (ntoh32 (hdr->rsp.op_errno));
+
+	if (op_ret < 0 && op_errno == ENOTCONN) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"setvolume failed (%s)",
+			strerror (op_errno));
+		goto out;
+	}
+
+	reply = dict_new ();
+	GF_VALIDATE_OR_GOTO(this->name, reply, out);
+
+	dict_len = ntoh32 (rsp->dict_len);
+	ret = dict_unserialize (rsp->buf, dict_len, &reply);
+	if (ret < 0) {
+		gf_log (frame->this->name, GF_LOG_ERROR,
+			"failed to unserialize buffer(%p) to dictionary",
+			rsp->buf);
+		goto out;
+	}
+	
+	ret = dict_get_str (reply, "ERROR", &remote_error);
+	if (ret < 0) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"failed to get ERROR string from reply dictionary");
+	}
+
+	ret = dict_get_str (reply, "process-uuid", &process_uuid);
+	if (ret < 0) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"failed to get 'process-uuid' from reply dictionary");
+	}
+
+	if (op_ret < 0) {
+		gf_log (trans->xl->name, GF_LOG_ERROR,
+			"SETVOLUME on remote-host failed: %s",
+			remote_error ? remote_error : strerror (op_errno));
+		errno = op_errno;
+		if (op_errno == ENOTCONN)
+			goto out;
+	} else {
+		ctx = get_global_ctx_ptr ();
+		if (process_uuid && !strcmp (ctx->process_uuid,process_uuid)) {
+			ret = dict_get_str (this->options, "remote-subvolume",
+					    &remote_subvol);
+			if (!remote_subvol) 
+				goto out;
+			
+			gf_log (this->name, GF_LOG_WARNING, 
+				"attaching to the local volume '%s'",
+				remote_subvol);
+
+			/* TODO: */
+			conf->child = xlator_search_by_name (this, 
+							     remote_subvol);
+		}
+		gf_log (trans->xl->name, GF_LOG_INFO,
+			"connection and handshake succeeded");
+
+		pthread_mutex_lock (&(conn->lock));
+		{
+			conn->connected = 1;
+		}
+		pthread_mutex_unlock (&(conn->lock));
+
+		parent = trans->xl->parents;
+		while (parent) {
+			parent->xlator->notify (parent->xlator,
+						GF_EVENT_CHILD_UP,
+						trans->xl);
+			parent = parent->next;
+		}
+	}
+
+out:
+	STACK_DESTROY (frame->root);
+
+	if (reply)
+		dict_unref (reply);
+
+	return op_ret;
+}
+
+/*
+ * client_enosys_cbk -
+ * @frame: call frame
+ *
+ * not for external reference
+ */
+int
+client_enosys_cbk (call_frame_t *frame,
+                   gf_hdr_common_t *hdr, size_t hdrlen,
+                   char *buf, size_t buflen)
+{
+	STACK_DESTROY (frame->root);
+	return 0;
+}
+
+
+void
+client_protocol_reconnect (void *trans_ptr)
+{
+	transport_t         *trans = NULL;
+	client_connection_t *conn = NULL;
+	struct timeval       tv = {0, 0};
+
+	trans = trans_ptr;
+	conn  = trans->xl_private;
+	pthread_mutex_lock (&conn->lock);
+	{
+		if (conn->reconnect)
+			gf_timer_call_cancel (trans->xl->ctx, 
+					      conn->reconnect);
+		conn->reconnect = 0;
+
+		if (conn->connected == 0) {
+			tv.tv_sec = 10;
+
+			gf_log (trans->xl->name, GF_LOG_DEBUG,
+				"attempting reconnect");
+			transport_connect (trans);
+
+			conn->reconnect = 
+				gf_timer_call_after (trans->xl->ctx, tv,
+						     client_protocol_reconnect,
+						     trans);
+		} else {
+			gf_log (trans->xl->name, GF_LOG_DEBUG, 
+				"breaking reconnect chain");
+		}
+	}
+	pthread_mutex_unlock (&conn->lock);
+}
+
+/*
+ * client_protocol_cleanup - cleanup function
+ * @trans: transport object
+ *
+ */
+int
+protocol_client_cleanup (transport_t *trans)
+{
+	client_connection_t    *conn = NULL;
+	struct saved_frames    *saved_frames = NULL;
+
+	conn = trans->xl_private;
+			
+	gf_log (trans->xl->name, GF_LOG_DEBUG,
+		"cleaning up state in transport object %p", trans);
+
+	pthread_mutex_lock (&conn->lock);
+	{
+		saved_frames = conn->saved_frames;
+		conn->saved_frames = saved_frames_new ();
+
+/*
+		trav = conn->saved_fds->members_list;
+		this = trans->xl;
+
+		while (trav) {
+			fd_t *fd_tmp = (fd_t *)(long) strtoul (trav->key, 
+							       NULL, 0);
+			fd_ctx_del (fd_tmp, this, NULL);
+			trav = trav->next;
+		}
+
+		dict_destroy (conn->saved_fds);
+
+		conn->saved_fds = get_new_dict_full (64);
+*/
+		/* bailout logic cleanup */
+		memset (&(conn->last_sent), 0, 
+			sizeof (conn->last_sent));
+
+		memset (&(conn->last_received), 0, 
+			sizeof (conn->last_received));
+
+		if (conn->timer) {
+			gf_timer_call_cancel (trans->xl->ctx, conn->timer);
+			conn->timer = NULL;
+		}
+
+		if (conn->reconnect == NULL) {
+			/* :O This part is empty.. any thing missing? */
+		}
+	}
+	pthread_mutex_unlock (&conn->lock);
+
+	saved_frames_destroy (trans->xl, saved_frames,
+			      gf_fops, gf_mops, gf_cbks);
+
+	return 0;
+}
+
+
+/* cbk callbacks */
+int
+client_releasedir_cbk (call_frame_t *frame,
+		       gf_hdr_common_t *hdr, size_t hdrlen,
+		       char *buf, size_t buflen)
+{
+	STACK_DESTROY (frame->root);
+	return 0;
+}
+
+
+int
+client_release_cbk (call_frame_t *frame,
+		    gf_hdr_common_t *hdr, size_t hdrlen,
+		    char *buf, size_t buflen)
+{
+	STACK_DESTROY (frame->root);
+	return 0;
+}
+
+
+int
+client_forget_cbk (call_frame_t *frame,
+                   gf_hdr_common_t *hdr, size_t hdrlen,
+                   char *buf, size_t buflen)
+{
+	client_conf_t   *conf = NULL;
+	client_forget_t  forget = {0, };
+	uint8_t          send_forget = 0;
+	int32_t          ret = -1;
+
+
+	conf = frame->this->private;
+	LOCK (&conf->forget.lock);
+	{
+		conf->forget.frames_in_transit--;
+
+		ret = client_get_forgets (frame->this, &forget);
+		if (ret <= 0)
+			send_forget = 0;
+		else
+			send_forget = 1;
+	}
+	UNLOCK (&conf->forget.lock);
+
+	if (send_forget) {
+		ret = protocol_client_xfer (forget.frame, frame->this,
+					    CLIENT_CHANNEL (frame->this,
+							    CHANNEL_BULK),
+					    GF_OP_TYPE_CBK_REQUEST, 
+					    GF_CBK_FORGET,
+					    forget.hdr, forget.hdrlen, 
+					    NULL, 0, NULL);
+	}
+	
+	STACK_DESTROY (frame->root);
+	return 0;
+}
+
+
+static gf_op_t gf_fops[] = {
+	[GF_FOP_STAT]           =  client_stat_cbk,
+	[GF_FOP_READLINK]       =  client_readlink_cbk,
+	[GF_FOP_MKNOD]          =  client_mknod_cbk,
+	[GF_FOP_MKDIR]          =  client_mkdir_cbk,
+	[GF_FOP_UNLINK]         =  client_unlink_cbk,
+	[GF_FOP_RMDIR]          =  client_rmdir_cbk,
+	[GF_FOP_SYMLINK]        =  client_symlink_cbk,
+	[GF_FOP_RENAME]         =  client_rename_cbk,
+	[GF_FOP_LINK]           =  client_link_cbk,
+	[GF_FOP_CHMOD]          =  client_chmod_cbk,
+	[GF_FOP_CHOWN]          =  client_chown_cbk,
+	[GF_FOP_TRUNCATE]       =  client_truncate_cbk,
+	[GF_FOP_OPEN]           =  client_open_cbk,
+	[GF_FOP_READ]           =  client_readv_cbk,
+	[GF_FOP_WRITE]          =  client_write_cbk,
+	[GF_FOP_STATFS]         =  client_statfs_cbk,
+	[GF_FOP_FLUSH]          =  client_flush_cbk,
+	[GF_FOP_FSYNC]          =  client_fsync_cbk,
+	[GF_FOP_SETXATTR]       =  client_setxattr_cbk,
+	[GF_FOP_GETXATTR]       =  client_getxattr_cbk,
+	[GF_FOP_REMOVEXATTR]    =  client_removexattr_cbk,
+	[GF_FOP_OPENDIR]        =  client_opendir_cbk,
+	[GF_FOP_GETDENTS]       =  client_getdents_cbk,
+	[GF_FOP_FSYNCDIR]       =  client_fsyncdir_cbk,
+	[GF_FOP_ACCESS]         =  client_access_cbk,
+	[GF_FOP_CREATE]         =  client_create_cbk,
+	[GF_FOP_FTRUNCATE]      =  client_ftruncate_cbk,
+	[GF_FOP_FSTAT]          =  client_fstat_cbk,
+	[GF_FOP_LK]             =  client_lk_common_cbk,
+	[GF_FOP_UTIMENS]        =  client_utimens_cbk,
+	[GF_FOP_FCHMOD]         =  client_fchmod_cbk,
+	[GF_FOP_FCHOWN]         =  client_fchown_cbk,
+	[GF_FOP_LOOKUP]         =  client_lookup_cbk,
+	[GF_FOP_SETDENTS]       =  client_setdents_cbk,
+	[GF_FOP_READDIR]        =  client_readdir_cbk,
+	[GF_FOP_INODELK]        =  client_inodelk_cbk,
+	[GF_FOP_FINODELK]       =  client_finodelk_cbk,
+	[GF_FOP_ENTRYLK]        =  client_entrylk_cbk,
+	[GF_FOP_FENTRYLK]       =  client_fentrylk_cbk,
+	[GF_FOP_CHECKSUM]       =  client_checksum_cbk,
+	[GF_FOP_XATTROP]        =  client_xattrop_cbk,
+	[GF_FOP_FXATTROP]       =  client_fxattrop_cbk,
+};
+
+static gf_op_t gf_mops[] = {
+	[GF_MOP_SETVOLUME]        =  client_setvolume_cbk,
+	[GF_MOP_GETVOLUME]        =  client_enosys_cbk,
+	[GF_MOP_STATS]            =  client_stats_cbk,
+	[GF_MOP_SETSPEC]          =  client_setspec_cbk,
+	[GF_MOP_GETSPEC]          =  client_getspec_cbk,
+	[GF_MOP_PING]             =  client_ping_cbk,
+};
+
+static gf_op_t gf_cbks[] = {
+	[GF_CBK_FORGET]           = client_forget_cbk,
+	[GF_CBK_RELEASE]          = client_release_cbk,
+	[GF_CBK_RELEASEDIR]       = client_releasedir_cbk
+};
+
+/*
+ * client_protocol_interpret - protocol interpreter
+ * @trans: transport object
+ * @blk: data block
+ *
+ */
+int
+protocol_client_interpret (xlator_t *this, transport_t *trans,
+                           char *hdr_p, size_t hdrlen,
+                           char *buf_p, size_t buflen)
+{
+	int ret = -1;
+	call_frame_t *frame = NULL;
+	gf_hdr_common_t *hdr = NULL;
+	uint64_t callid = 0;
+	int type = -1;
+	int op = -1;
+
+
+	hdr  = (gf_hdr_common_t *)hdr_p;
+
+	type   = ntoh32 (hdr->type);
+	op     = ntoh32 (hdr->op);
+	callid = ntoh64 (hdr->callid);
+
+	frame  = lookup_frame (trans, op, type, callid);
+	if (frame == NULL) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"no frame for callid=%"PRId64" type=%d op=%d",
+			callid, type, op);
+		return 0;
+	}
+
+	switch (type) {
+	case GF_OP_TYPE_FOP_REPLY:
+		if ((op > GF_FOP_MAXVALUE) || 
+		    (op < 0)) {
+			gf_log (trans->xl->name, GF_LOG_WARNING,
+				"invalid fop '%d'", op);
+		} else {
+			ret = gf_fops[op] (frame, hdr, hdrlen, buf_p, buflen);
+		}
+		break;
+	case GF_OP_TYPE_MOP_REPLY:
+		if ((op > GF_MOP_MAXVALUE) || 
+		    (op < 0)) {
+			gf_log (trans->xl->name, GF_LOG_WARNING,
+				"invalid fop '%d'", op);
+		} else {
+			ret = gf_mops[op] (frame, hdr, hdrlen, buf_p, buflen);
+		}
+		break;
+	case GF_OP_TYPE_CBK_REPLY:
+		if ((op > GF_CBK_MAXVALUE) || 
+		    (op < 0)) {
+			gf_log (trans->xl->name, GF_LOG_WARNING,
+				"invalid cbk '%d'", op);
+		} else {
+			ret = gf_cbks[op] (frame, hdr, hdrlen, buf_p, buflen);
+		}
+		break;
+	default:
+		gf_log (trans->xl->name, GF_LOG_ERROR,
+			"invalid packet type: %d", type);
+		break;
+	}
+
+	return ret;
+}
+
+/*
+ * init - initiliazation function. called during loading of client protocol
+ * @this:
+ *
+ */
+int32_t
+init (xlator_t *this)
+{
+	transport_t               *trans = NULL;
+	client_conf_t             *conf = NULL;
+	client_connection_t       *conn = NULL;
+	int32_t                    transport_timeout = 0;
+	int32_t                    ping_timeout = 0;
+	data_t                    *remote_subvolume = NULL;
+	int32_t                    ret = -1;
+	int                        i = 0;
+
+	if (this->children) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"FATAL: client protocol translator cannot have "
+			"subvolumes");
+		goto out;
+	}
+	
+	if (!this->parents) {
+		gf_log (this->name, GF_LOG_WARNING,
+			"dangling volume. check volfile ");
+	}
+
+	remote_subvolume = dict_get (this->options, "remote-subvolume");
+	if (remote_subvolume == NULL) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"missing 'option remote-subvolume'.");
+		goto out;
+	}
+
+	ret = dict_get_int32 (this->options, "transport-timeout", 
+			      &transport_timeout);
+	if (ret >= 0) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"setting transport-timeout to %d", transport_timeout);
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"defaulting transport-timeout to 42");
+		transport_timeout = 42;
+	}
+	
+	ret = dict_get_int32 (this->options, "ping-timeout", 
+			      &ping_timeout);
+	if (ret >= 0) {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"setting ping-timeout to %d", ping_timeout);
+	} else {
+		gf_log (this->name, GF_LOG_DEBUG,
+			"defaulting ping-timeout to 10");
+		ping_timeout = 10;
+	}
+	
+	conf = CALLOC (1, sizeof (client_conf_t));
+
+	LOCK_INIT (&conf->forget.lock);
+	pthread_mutex_init (&conf->mutex, NULL);
+	conf->saved_fds = get_new_dict_full (64);
+
+	this->private = conf;
+
+	for (i = 0; i < CHANNEL_MAX; i++) {
+		trans = transport_load (this->options, this);
+		if (trans == NULL) {
+			gf_log (this->name, GF_LOG_ERROR, 
+				"Failed to load transport");
+			ret = -1;
+			goto out;
+		}
+
+		conn = CALLOC (1, sizeof (*conn));
+
+		conn->saved_frames = saved_frames_new ();
+
+		conn->callid = 1;
+
+		memset (&(conn->last_sent), 0, sizeof (conn->last_sent));
+		memset (&(conn->last_received), 0,
+			sizeof (conn->last_received));
+
+		conn->transport_timeout = transport_timeout;
+		conn->ping_timeout = ping_timeout;
+
+		pthread_mutex_init (&conn->lock, NULL);
+
+		trans->xl_private = conn;
+		conf->transport[i] = transport_ref (trans);
+	}
+
+#ifndef GF_DARWIN_HOST_OS
+	{
+		struct rlimit lim;
+
+		lim.rlim_cur = 1048576;
+		lim.rlim_max = 1048576;
+		
+		ret = setrlimit (RLIMIT_NOFILE, &lim);
+		if (ret == -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;
+			
+			ret = setrlimit (RLIMIT_NOFILE, &lim);
+			if (ret == -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
+	ret = 0;
+out:
+	return ret;
+}
+
+/*
+ * fini - finish function called during unloading of client protocol
+ * @this:
+ *
+ */
+void
+fini (xlator_t *this)
+{
+	/* TODO: Check if its enough.. how to call transport's fini () */
+	client_conf_t *conf = NULL;
+
+	conf = this->private;
+	this->private = NULL;
+
+	if (conf) {
+		LOCK_DESTROY (&conf->forget.lock);
+		FREE (conf);
+	}
+	return;
+}
+
+
+int
+protocol_client_handshake (xlator_t *this, transport_t *trans)
+{
+	gf_hdr_common_t        *hdr = NULL;
+	gf_mop_setvolume_req_t *req = NULL;
+	dict_t                 *options = NULL;
+	int32_t                 ret = -1;
+	int                     hdrlen = 0;
+	int                     dict_len = 0;
+	call_frame_t           *fr = NULL;
+	char                   *process_uuid_xl;
+
+	options = this->options;
+	ret = dict_set_str (options, "version", PACKAGE_VERSION);
+	if (ret < 0) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"failed to set version(%s) in options dictionary",
+			PACKAGE_VERSION);
+	}
+
+	asprintf (&process_uuid_xl, "%s-%s", this->ctx->process_uuid,
+		  this->name);
+	ret = dict_set_dynstr (options, "process-uuid",
+			       process_uuid_xl);
+	if (ret < 0) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"failed to set process-uuid(%s) in options dictionary",
+			PACKAGE_VERSION);
+	}
+
+	dict_len = dict_serialized_length (options);
+	if (dict_len < 0) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"failed to get serialized length of dict(%p)",
+			options);
+		ret = dict_len;
+		goto fail;
+	}
+
+	hdrlen = gf_hdr_len (req, dict_len);
+	hdr    = gf_hdr_new (req, dict_len);
+	GF_VALIDATE_OR_GOTO(this->name, hdr, fail);
+
+	req    = gf_param (hdr);
+
+	ret = dict_serialize (options, req->buf);
+	if (ret < 0) {
+		gf_log (this->name, GF_LOG_ERROR,
+			"failed to serialize dictionary(%p)",
+			options);
+		goto fail;
+	}
+
+	req->dict_len = hton32 (dict_len);
+	fr  = create_frame (this, this->ctx->pool);
+	GF_VALIDATE_OR_GOTO(this->name, fr, fail);
+
+	fr->local = trans;
+	ret = protocol_client_xfer (fr, this, trans,
+				    GF_OP_TYPE_MOP_REQUEST, GF_MOP_SETVOLUME,
+				    hdr, hdrlen, NULL, 0, NULL);
+	return ret;
+fail:
+	if (hdr)
+		free (hdr);
+	return ret;
+}
+
+
+int
+protocol_client_pollout (xlator_t *this, transport_t *trans)
+{
+	client_connection_t *conn = NULL;
+
+	conn = trans->xl_private;
+
+	pthread_mutex_lock (&conn->lock);
+	{
+		gettimeofday (&conn->last_sent, NULL);
+	}
+	pthread_mutex_unlock (&conn->lock);
+
+	return 0;
+}
+
+
+int
+protocol_client_pollin (xlator_t *this, transport_t *trans)
+{
+	client_connection_t *conn = NULL;
+	int ret = -1;
+	char *buf = NULL;
+	size_t buflen = 0;
+	char *hdr = NULL;
+	size_t hdrlen = 0;
+	int connected = 0;
+
+	conn = trans->xl_private;
+
+	pthread_mutex_lock (&conn->lock);
+	{
+		gettimeofday (&conn->last_received, NULL);
+		connected = conn->connected;
+	}
+	pthread_mutex_unlock (&conn->lock);
+
+	ret = transport_receive (trans, &hdr, &hdrlen, &buf, &buflen);
+
+	if (ret == 0)
+	{
+		ret = protocol_client_interpret (this, trans, hdr, hdrlen,
+						 buf, buflen);
+	}
+
+	/* TODO: use mem-pool */
+	FREE (hdr);
+
+	return ret;
+}
+
+
+/*
+ * client_protocol_notify - notify function for client protocol
+ * @this:
+ * @trans: transport object
+ * @event
+ *
+ */
+
+int32_t
+notify (xlator_t *this,
+        int32_t event,
+        void *data,
+        ...)
+{
+	int ret = -1;
+	transport_t *trans = NULL;
+	client_connection_t *conn = NULL;
+
+	trans = data;
+
+	switch (event) {
+	case GF_EVENT_POLLOUT:
+	{
+		ret = protocol_client_pollout (this, trans);
+
+		break;
+	}
+	case GF_EVENT_POLLIN:
+	{
+		ret = protocol_client_pollin (this, trans);
+
+		break;
+	}
+	/* no break for ret check to happen below */
+	case GF_EVENT_POLLERR:
+	{
+		ret = -1;
+		protocol_client_cleanup (trans);
+	}
+
+	conn = trans->xl_private;
+	if (conn->connected) {
+		xlator_list_t *parent = NULL;
+
+		gf_log (this->name, GF_LOG_INFO, "disconnected");
+
+		parent = this->parents;
+		while (parent) {
+			parent->xlator->notify (parent->xlator,
+						GF_EVENT_CHILD_DOWN,
+						this);
+			parent = parent->next;
+		}
+
+		conn->connected = 0;
+		if (conn->reconnect == 0)
+			client_protocol_reconnect (trans);
+	}
+	break;
+
+	case GF_EVENT_PARENT_UP:
+	{
+		xlator_list_t *parent = NULL;
+		client_conf_t *conf = NULL;
+		int            i = 0;
+		transport_t   *trans = NULL;
+
+		conf = this->private;
+		for (i = 0; i < CHANNEL_MAX; i++) {
+			trans = conf->transport[i];
+			if (!trans) {
+				gf_log (this->name, GF_LOG_DEBUG,
+					"transport init failed");
+				return -1;
+			}
+
+			conn = trans->xl_private;
+
+			gf_log (this->name, GF_LOG_DEBUG,
+				"got GF_EVENT_PARENT_UP, attempting connect "
+				"on transport");
+
+			client_protocol_reconnect (trans);
+		}
+
+		/* Let the connection/re-connection happen in 
+		 * background, for now, don't hang here,
+		 * tell the parents that i am all ok..
+		 */
+		parent = trans->xl->parents;
+		while (parent) {
+			parent->xlator->notify (parent->xlator,
+						GF_EVENT_CHILD_CONNECTING,
+						trans->xl);
+			parent = parent->next;
+		}
+	}
+	break;
+
+	case GF_EVENT_CHILD_UP:
+	{
+		char *handshake = NULL;
+
+		ret = dict_get_str (this->options, "disable-handshake", 
+				    &handshake);
+		gf_log (this->name, GF_LOG_DEBUG, 
+			"got GF_EVENT_CHILD_UP");
+		if ((ret < 0) ||
+		    (strcasecmp (handshake, "on"))) {
+			ret = protocol_client_handshake (this, trans);
+		} else {
+			conn = trans->xl_private;
+			conn->connected = 1;
+			ret = default_notify (this, event, trans);
+		}
+
+		if (ret)
+			transport_disconnect (trans);
+
+	}
+	break;
+
+	default:
+		gf_log (this->name, GF_LOG_DEBUG,
+			"got %d, calling default_notify ()", event);
+
+		default_notify (this, event, data);
+		break;
+	}
+
+	return ret;
+}
+
+
+struct xlator_fops fops = {
+	.stat        = client_stat,
+	.readlink    = client_readlink,
+	.mknod       = client_mknod,
+	.mkdir       = client_mkdir,
+	.unlink      = client_unlink,
+	.rmdir       = client_rmdir,
+	.symlink     = client_symlink,
+	.rename      = client_rename,
+	.link        = client_link,
+	.chmod       = client_chmod,
+	.chown       = client_chown,
+	.truncate    = client_truncate,
+	.utimens     = client_utimens,
+	.open        = client_open,
+	.readv       = client_readv,
+	.writev      = client_writev,
+	.statfs      = client_statfs,
+	.flush       = client_flush,
+	.fsync       = client_fsync,
+	.setxattr    = client_setxattr,
+	.getxattr    = client_getxattr,
+	.removexattr = client_removexattr,
+	.opendir     = client_opendir,
+	.readdir     = client_readdir,
+	.fsyncdir    = client_fsyncdir,
+	.access      = client_access,
+	.ftruncate   = client_ftruncate,
+	.fstat       = client_fstat,
+	.create      = client_create,
+	.lk          = client_lk,
+	.inodelk     = client_inodelk,
+	.finodelk    = client_finodelk,
+	.entrylk     = client_entrylk,
+	.fentrylk    = client_fentrylk,
+	.lookup      = client_lookup,
+	.fchmod      = client_fchmod,
+	.fchown      = client_fchown,
+	.setdents    = client_setdents,
+	.getdents    = client_getdents,
+	.checksum    = client_checksum,
+	.xattrop     = client_xattrop,
+	.fxattrop    = client_fxattrop,
+};
+
+struct xlator_mops mops = {
+	.stats     = client_stats,
+	.getspec   = client_getspec,
+};
+
+struct xlator_cbks cbks = {
+	.forget     = client_forget,
+	.release    = client_release,
+	.releasedir = client_releasedir
+};
+
+
+struct volume_options options[] = {
+ 	{ .key   = {"username"}, 
+	  .type  = GF_OPTION_TYPE_ANY 
+	},
+ 	{ .key   = {"password"}, 
+	  .type  = GF_OPTION_TYPE_ANY 
+	},
+ 	{ .key   = {"transport-type"}, 
+	  .value = {"tcp", "socket", "ib-verbs", "unix", "ib-sdp", 
+		    "tcp/client", "ib-verbs/client"},
+	  .type  = GF_OPTION_TYPE_STR 
+	},
+ 	{ .key   = {"remote-host"}, 
+	  .type  = GF_OPTION_TYPE_ANY 
+	},
+ 	{ .key   = {"remote-subvolume"}, 
+	  .type  = GF_OPTION_TYPE_ANY 
+	},
+ 	{ .key   = {"transport-timeout"}, 
+	  .type  = GF_OPTION_TYPE_TIME, 
+	  .min   = 5, 
+	  .max   = 1013, 
+	}, 
+	{ .key   = {"ping-timeout"},
+	  .type  = GF_OPTION_TYPE_TIME,
+	  .min   = 5,
+	  .max   = 1013,
+	},
+	{ .key   = {NULL} },
+};