core: change lk-owner as a 1k buffer

so, NLM can send the lk-owner field directly to the locks translators,
while doing the same effort, also enabled sending maximum of 500 aux gid
over protocol.

Change-Id: I87c2514392748416f7ffe21d5154faad2e413969
Signed-off-by: Amar Tumballi <amar@gluster.com>
BUG: 767229
Reviewed-on: http://review.gluster.com/779
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@gluster.com>

56 files changed, 1043 insertions, 682 deletions

diff --git a/contrib/fuse-lib/misc.c b/contrib/fuse-lib/misc.c
index 28a9284bf96..0c41b1a1917 100644
--- a/contrib/fuse-lib/misc.c
+++ b/contrib/fuse-lib/misc.c
@@ -50,5 +50,5 @@ convert_fuse_file_lock (struct fuse_file_lock *fl, struct gf_flock *flock,
         else
                 flock->l_len = fl->end - fl->start + 1;
         flock->l_pid = fl->pid;
-        flock->l_owner = lk_owner;
+        set_lk_owner_from_uint64 (&flock->l_owner, lk_owner);
 }
diff --git a/extras/generate-xdr-files.sh b/extras/generate-xdr-files.sh
index d1c2f13685f..e52321cd362 100755
--- a/extras/generate-xdr-files.sh
+++ b/extras/generate-xdr-files.sh
@@ -82,7 +82,7 @@ main ()
     rpcgen -h -o $hfile $xfile;
 
     # the '#ifdef' part of file should be fixed
-    sed -i -e 's:\(.*\)-\(.*\)_H_RPCGEN:\1_\2_H_RPCGEN:g' $hfile;
+    sed -i -e 's/-/_/g' $hfile;
 
     echo "OK";
 
diff --git a/libglusterfs/src/Makefile.am b/libglusterfs/src/Makefile.am
index 25de376aaeb..34543f62215 100644
--- a/libglusterfs/src/Makefile.am
+++ b/libglusterfs/src/Makefile.am
@@ -37,7 +37,7 @@ noinst_HEADERS = common-utils.h defaults.h dict.h glusterfs.h hashfn.h \
 	rbthash.h iatt.h latency.h mem-types.h $(CONTRIBDIR)/uuid/uuidd.h \
 	$(CONTRIBDIR)/uuid/uuid.h $(CONTRIBDIR)/uuid/uuidP.h \
 	$(CONTRIB_BUILDDIR)/uuid/uuid_types.h syncop.h graph-utils.h trie.h run.h \
-	options.h
+	options.h lkowner.h
 
 EXTRA_DIST = graph.l graph.y
 
diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
index b9f752b750b..ce1e1f45bff 100644
--- a/libglusterfs/src/common-utils.c
+++ b/libglusterfs/src/common-utils.c
@@ -40,6 +40,7 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <signal.h>
+#include <stdlib.h>
 
 #include "logging.h"
 #include "common-utils.h"
@@ -48,6 +49,7 @@
 #include "stack.h"
 #include "globals.h"
 #include "md5.h"
+#include "lkowner.h"
 
 #ifndef AI_ADDRCONFIG
 #define AI_ADDRCONFIG 0
@@ -1656,6 +1658,25 @@ uuid_utoa_r (uuid_t uuid, char *dst)
         return dst;
 }
 
+/*Thread safe conversion function*/
+char *
+lkowner_utoa (gf_lkowner_t *lkowner)
+{
+        char *lkowner_buffer = glusterfs_lkowner_buf_get();
+        lkowner_unparse (lkowner, lkowner_buffer, GF_LKOWNER_BUF_SIZE);
+        return lkowner_buffer;
+}
+
+/*Re-entrant conversion function*/
+char *
+lkowner_utoa_r (gf_lkowner_t *lkowner, char *dst, int len)
+{
+        if(!dst)
+                return NULL;
+        lkowner_unparse (lkowner, dst, len);
+        return dst;
+}
+
 void _get_md5_str (char *out_str, size_t outlen,
                    const uint8_t *input, int n)
 {
diff --git a/libglusterfs/src/common-utils.h b/libglusterfs/src/common-utils.h
index 4e7f981b3fe..d81da35c5b0 100644
--- a/libglusterfs/src/common-utils.h
+++ b/libglusterfs/src/common-utils.h
@@ -444,6 +444,9 @@ char valid_internet_address (char *address);
 
 char *uuid_utoa (uuid_t uuid);
 char *uuid_utoa_r (uuid_t uuid, char *dst);
+char *lkowner_utoa (gf_lkowner_t *lkowner);
+char *lkowner_utoa_r (gf_lkowner_t *lkowner, char *dst, int len);
+
 void _get_md5_str (char *out_str, size_t outlen,
                    const uint8_t *input, int n);
 void gf_array_insertionsort (void *a, int l, int r, size_t elem_size,
diff --git a/libglusterfs/src/globals.c b/libglusterfs/src/globals.c
index 57946f70480..8b641123f15 100644
--- a/libglusterfs/src/globals.c
+++ b/libglusterfs/src/globals.c
@@ -293,6 +293,43 @@ glusterfs_uuid_buf_get ()
         return buf;
 }
 
+/* LKOWNER_BUFFER */
+
+static pthread_key_t lkowner_buf_key;
+static char global_lkowner_buf[GF_LKOWNER_BUF_SIZE];
+void
+glusterfs_lkowner_buf_destroy (void *ptr)
+{
+        if (ptr)
+                FREE (ptr);
+}
+
+int
+glusterfs_lkowner_buf_init ()
+{
+        int ret = 0;
+
+        ret = pthread_key_create (&lkowner_buf_key,
+                                  glusterfs_lkowner_buf_destroy);
+        return ret;
+}
+
+char *
+glusterfs_lkowner_buf_get ()
+{
+        char *buf;
+        int ret = 0;
+
+        buf = pthread_getspecific (lkowner_buf_key);
+        if(!buf) {
+                buf = MALLOC (GF_LKOWNER_BUF_SIZE);
+                ret = pthread_setspecific (lkowner_buf_key, (void *) buf);
+                if(ret)
+                        buf = global_lkowner_buf;
+        }
+        return buf;
+}
+
 int
 glusterfs_globals_init ()
 {
@@ -323,6 +360,13 @@ glusterfs_globals_init ()
                 goto out;
         }
 
+        ret = glusterfs_lkowner_buf_init ();
+        if(ret) {
+                gf_log ("", GF_LOG_CRITICAL,
+                        "ERROR: glusterfs lkowner buffer init failed");
+                goto out;
+        }
+
         gf_mem_acct_enable_set ();
 
         ret = synctask_init ();
diff --git a/libglusterfs/src/globals.h b/libglusterfs/src/globals.h
index 7003351ab55..86e1f0324c4 100644
--- a/libglusterfs/src/globals.h
+++ b/libglusterfs/src/globals.h
@@ -22,12 +22,6 @@
 
 #define GF_DEFAULT_BASE_PORT 24007
 
-/* This corresponds to the max 16 number of group IDs that are sent through an
- * RPC request. Since NFS is the only one going to set this, we can be safe
- * in keeping this size hardcoded.
- */
-#define GF_REQUEST_MAXGROUPS    16
-
 #include "glusterfs.h"
 
 /* CTX */
@@ -52,6 +46,7 @@ int synctask_set (void *);
 
 /* uuid_buf */
 char *glusterfs_uuid_buf_get();
+char *glusterfs_lkowner_buf_get();
 
 /* init */
 int glusterfs_globals_init (void);
diff --git a/libglusterfs/src/glusterfs.h b/libglusterfs/src/glusterfs.h
index 903d2324a06..2f68ab74106 100644
--- a/libglusterfs/src/glusterfs.h
+++ b/libglusterfs/src/glusterfs.h
@@ -45,7 +45,6 @@
 #include "list.h"
 #include "logging.h"
 
-
 #define GF_YES 1
 #define GF_NO  0
 
@@ -114,6 +113,12 @@
 /* TODO: Should we use PATH-MAX? On some systems it may save space */
 #define ZR_PATH_MAX 4096
 
+/* GlusterFS's maximum supported Auxilary GIDs */
+/* TODO: Keeping it to 200, so that we can fit in 2KB buffer for auth data
+ * in RPC server code, if there is ever need for having more aux-gids, then
+ * we have to add aux-gid in payload of actors */
+#define GF_MAX_AUX_GROUPS   200
+
 /* NOTE: add members ONLY at the end (just before _MAXVALUE) */
 typedef enum {
         GF_FOP_NULL = 0,
@@ -177,15 +182,6 @@ typedef enum {
         GF_OP_TYPE_MAX,
 } gf_op_type_t;
 
-struct gf_flock {
-        short    l_type;
-        short    l_whence;
-        off_t    l_start;
-        off_t    l_len;
-        pid_t    l_pid;
-        uint64_t l_owner;
-};
-
 /* NOTE: all the miscellaneous flags used by GlusterFS should be listed here */
 typedef enum {
         GF_LK_GETLK = 0,
@@ -385,6 +381,19 @@ typedef enum {
         GF_EVENT_MAXVAL,
 } glusterfs_event_t;
 
+/* gf_lkowner_t is defined in lkowner.h */
+#include "lkowner.h"
+
+struct gf_flock {
+        short        l_type;
+        short        l_whence;
+        off_t        l_start;
+        off_t        l_len;
+        pid_t        l_pid;
+        gf_lkowner_t l_owner;
+};
+
+
 extern char *glusterfs_strevent (glusterfs_event_t ev);
 
 #define GF_MUST_CHECK __attribute__((warn_unused_result))
diff --git a/libglusterfs/src/lkowner.h b/libglusterfs/src/lkowner.h
new file mode 100644
index 00000000000..5fee17b3ddc
--- /dev/null
+++ b/libglusterfs/src/lkowner.h
@@ -0,0 +1,92 @@
+/*
+  Copyright (c) 2012 Red Hat <http://www.redhat.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 _LK_OWNER_H
+#define _LK_OWNER_H
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#define GF_MAX_LOCK_OWNER_LEN 1024 /* 1kB as per NLM */
+
+/* 16strings-16strings-... */
+#define GF_LKOWNER_BUF_SIZE  ((GF_MAX_LOCK_OWNER_LEN * 2) +     \
+                              (GF_MAX_LOCK_OWNER_LEN / 8))
+
+typedef struct gf_lkowner_ {
+        int  len;
+        char data[GF_MAX_LOCK_OWNER_LEN];
+} gf_lkowner_t;
+
+
+/* LKOWNER to string functions */
+static inline void
+lkowner_unparse (gf_lkowner_t *lkowner, char *buf, int buf_len)
+{
+        int i = 0;
+        int j = 0;
+
+        for (i = 0; i < lkowner->len; i++) {
+                if (i && !(i % 8)) {
+                        buf[j] = '-';
+                        j++;
+                }
+                sprintf (&buf[j], "%02x", lkowner->data[i]);
+                j += 2;
+                if (j == buf_len)
+                        break;
+        }
+        if (j < buf_len)
+                buf[j] = '\0';
+}
+
+static inline void
+set_lk_owner_from_ptr (gf_lkowner_t *lkowner, void *data)
+{
+        int i = 0;
+        int j = 0;
+
+        lkowner->len = sizeof (unsigned long);
+        for (i = 0, j = 0; i < lkowner->len; i++, j += 8) {
+                lkowner->data[i] =  (char)((((unsigned long)data) >> j) & 0xff);
+        }
+}
+
+static inline void
+set_lk_owner_from_uint64 (gf_lkowner_t *lkowner, uint64_t data)
+{
+        int i = 0;
+        int j = 0;
+
+        lkowner->len = 8;
+        for (i = 0, j = 0; i < lkowner->len; i++, j += 8) {
+                lkowner->data[i] =  (char)((data >> j) & 0xff);
+        }
+}
+
+/* Return true if the locks have the same owner */
+static inline int
+is_same_lkowner (gf_lkowner_t *l1, gf_lkowner_t *l2)
+{
+        return ((l1->len == l2->len) && !memcmp(l1->data, l2->data, l1->len));
+}
+
+#endif /* _LK_OWNER_H */
diff --git a/libglusterfs/src/stack.h b/libglusterfs/src/stack.h
index 546e2f968c1..a5689e0966f 100644
--- a/libglusterfs/src/stack.h
+++ b/libglusterfs/src/stack.h
@@ -44,6 +44,7 @@ typedef struct _call_pool_t call_pool_t;
 #include "list.h"
 #include "common-utils.h"
 #include "globals.h"
+#include "lkowner.h"
 
 #define NFS_PID 1
 #define LOW_PRIO_PROC_PID -1
@@ -106,9 +107,9 @@ struct _call_stack_t {
         uid_t                         uid;
         gid_t                         gid;
         pid_t                         pid;
-        uint32_t                      ngrps;
-        uint32_t                      groups[GF_REQUEST_MAXGROUPS];
-        uint64_t                      lk_owner;
+        uint16_t                      ngrps;
+        uint32_t                      groups[GF_MAX_AUX_GROUPS];
+        gf_lkowner_t                  lk_owner;
 
         call_frame_t                  frames;
 
@@ -360,7 +361,7 @@ copy_frame (call_frame_t *frame)
         newstack->op  = oldstack->op;
         newstack->type = oldstack->type;
         memcpy (newstack->groups, oldstack->groups,
-                sizeof (uint32_t) * GF_REQUEST_MAXGROUPS);
+                sizeof (gid_t) * GF_MAX_AUX_GROUPS);
         newstack->unique = oldstack->unique;
 
         newstack->frames.this = frame->this;
diff --git a/rpc/rpc-lib/src/Makefile.am b/rpc/rpc-lib/src/Makefile.am
index fcf091e9b0c..8b087301c63 100644
--- a/rpc/rpc-lib/src/Makefile.am
+++ b/rpc/rpc-lib/src/Makefile.am
@@ -1,8 +1,8 @@
 lib_LTLIBRARIES = libgfrpc.la
 
 libgfrpc_la_SOURCES = auth-unix.c rpcsvc-auth.c rpcsvc.c auth-null.c \
-	rpc-transport.c xdr-rpc.c xdr-rpcclnt.c rpc-clnt.c auth-glusterfs.c \
-	rpc-common.c
+	rpc-transport.c xdr-rpc.c xdr-rpcclnt.c rpc-clnt.c auth-glusterfs.c
+
 libgfrpc_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
 
 noinst_HEADERS = rpcsvc.h rpc-transport.h xdr-common.h xdr-rpc.h xdr-rpcclnt.h \
diff --git a/rpc/rpc-lib/src/auth-glusterfs.c b/rpc/rpc-lib/src/auth-glusterfs.c
index 4faaddb9e7b..9996bfad458 100644
--- a/rpc/rpc-lib/src/auth-glusterfs.c
+++ b/rpc/rpc-lib/src/auth-glusterfs.c
@@ -29,94 +29,9 @@
 #include "dict.h"
 #include "xdr-rpc.h"
 #include "xdr-common.h"
+#include "rpc-common-xdr.h"
 
-bool_t
-xdr_auth_glusterfs_parms (XDR *xdrs, auth_glusterfs_parms *objp)
-{
-	register int32_t *buf;
-
-	int i;
-
-	if (xdrs->x_op == XDR_ENCODE) {
-		 if (!xdr_u_quad_t (xdrs, &objp->lk_owner))
-			 return FALSE;
-		buf = XDR_INLINE (xdrs, (4 +  16 )* BYTES_PER_XDR_UNIT);
-		if (buf == NULL) {
-			 if (!xdr_u_int (xdrs, &objp->pid))
-				 return FALSE;
-			 if (!xdr_u_int (xdrs, &objp->uid))
-				 return FALSE;
-			 if (!xdr_u_int (xdrs, &objp->gid))
-				 return FALSE;
-			 if (!xdr_u_int (xdrs, &objp->ngrps))
-				 return FALSE;
-			 if (!xdr_vector (xdrs, (char *)objp->groups, 16,
-				sizeof (u_int), (xdrproc_t) xdr_u_int))
-				 return FALSE;
-		} else {
-			IXDR_PUT_U_LONG(buf, objp->pid);
-			IXDR_PUT_U_LONG(buf, objp->uid);
-			IXDR_PUT_U_LONG(buf, objp->gid);
-			IXDR_PUT_U_LONG(buf, objp->ngrps);
-			{
-				register u_int *genp;
-
-				for (i = 0, genp = objp->groups;
-					i < 16; ++i) {
-					IXDR_PUT_U_LONG(buf, *genp++);
-				}
-			}
-		}
-		return TRUE;
-	} else if (xdrs->x_op == XDR_DECODE) {
-		 if (!xdr_u_quad_t (xdrs, &objp->lk_owner))
-			 return FALSE;
-		buf = XDR_INLINE (xdrs, (4 +  16 )* BYTES_PER_XDR_UNIT);
-		if (buf == NULL) {
-			 if (!xdr_u_int (xdrs, &objp->pid))
-				 return FALSE;
-			 if (!xdr_u_int (xdrs, &objp->uid))
-				 return FALSE;
-			 if (!xdr_u_int (xdrs, &objp->gid))
-				 return FALSE;
-			 if (!xdr_u_int (xdrs, &objp->ngrps))
-				 return FALSE;
-			 if (!xdr_vector (xdrs, (char *)objp->groups, 16,
-				sizeof (u_int), (xdrproc_t) xdr_u_int))
-				 return FALSE;
-		} else {
-			objp->pid = IXDR_GET_U_LONG(buf);
-			objp->uid = IXDR_GET_U_LONG(buf);
-			objp->gid = IXDR_GET_U_LONG(buf);
-			objp->ngrps = IXDR_GET_U_LONG(buf);
-			{
-				register u_int *genp;
-
-				for (i = 0, genp = objp->groups;
-					i < 16; ++i) {
-					*genp++ = IXDR_GET_U_LONG(buf);
-				}
-			}
-		}
-	 return TRUE;
-	}
-
-	 if (!xdr_u_quad_t (xdrs, &objp->lk_owner))
-		 return FALSE;
-	 if (!xdr_u_int (xdrs, &objp->pid))
-		 return FALSE;
-	 if (!xdr_u_int (xdrs, &objp->uid))
-		 return FALSE;
-	 if (!xdr_u_int (xdrs, &objp->gid))
-		 return FALSE;
-	 if (!xdr_u_int (xdrs, &objp->ngrps))
-		 return FALSE;
-	 if (!xdr_vector (xdrs, (char *)objp->groups, 16,
-		sizeof (u_int), (xdrproc_t) xdr_u_int))
-		 return FALSE;
-	return TRUE;
-}
-
+/* V1 */
 
 ssize_t
 xdr_to_glusterfs_auth (char *buf, struct auth_glusterfs_parms *req)
@@ -146,7 +61,7 @@ auth_glusterfs_request_init (rpcsvc_request_t *req, void *priv)
 {
         if (!req)
                 return -1;
-        memset (req->verf.authdata, 0, RPCSVC_MAX_AUTH_BYTES);
+        memset (req->verf.authdata, 0, GF_MAX_AUTH_BYTES);
         req->verf.datalen = 0;
         req->verf.flavour = AUTH_NULL;
 
@@ -155,9 +70,12 @@ auth_glusterfs_request_init (rpcsvc_request_t *req, void *priv)
 
 int auth_glusterfs_authenticate (rpcsvc_request_t *req, void *priv)
 {
-        int                          ret = RPCSVC_AUTH_REJECT;
         struct auth_glusterfs_parms  au = {0,};
-        int                          gidcount = 0;
+
+        int ret      = RPCSVC_AUTH_REJECT;
+        int gidcount = 0;
+        int j        = 0;
+        int i        = 0;
 
         if (!req)
                 return ret;
@@ -173,7 +91,11 @@ int auth_glusterfs_authenticate (rpcsvc_request_t *req, void *priv)
         req->pid = au.pid;
         req->uid = au.uid;
         req->gid = au.gid;
-        req->lk_owner = au.lk_owner;
+        req->lk_owner.len = 8;
+        {
+                for (i = 0; i < req->lk_owner.len; i++, j += 8)
+                        req->lk_owner.data[i] = (char)((au.lk_owner >> j) & 0xff);
+        }
         req->auxgidcount = au.ngrps;
 
         if (req->auxgidcount > 16) {
@@ -187,8 +109,8 @@ int auth_glusterfs_authenticate (rpcsvc_request_t *req, void *priv)
                 req->auxgids[gidcount] = au.groups[gidcount];
 
         gf_log (GF_RPCSVC, GF_LOG_TRACE, "Auth Info: pid: %u, uid: %d"
-                ", gid: %d, owner: %"PRId64,
-                req->pid, req->uid, req->gid, req->lk_owner);
+                ", gid: %d, owner: %s",
+                req->pid, req->uid, req->gid, lkowner_utoa (&req->lk_owner));
         ret = RPCSVC_AUTH_ACCEPT;
 err:
         return ret;
@@ -213,3 +135,111 @@ rpcsvc_auth_glusterfs_init (rpcsvc_t *svc, dict_t *options)
 {
         return &rpcsvc_auth_glusterfs;
 }
+
+/* V2 */
+
+ssize_t
+xdr_to_glusterfs_auth_v2 (char *buf, struct auth_glusterfs_parms_v2 *req)
+{
+        XDR     xdr;
+        ssize_t ret = -1;
+
+        if ((!buf) || (!req))
+                return -1;
+
+        xdrmem_create (&xdr, buf, GF_MAX_AUTH_BYTES, XDR_DECODE);
+        if (!xdr_auth_glusterfs_parms_v2 (&xdr, req)) {
+                gf_log ("", GF_LOG_WARNING,
+                        "failed to decode glusterfs v2 parameters");
+                ret  = -1;
+                goto ret;
+        }
+
+        ret = (((size_t)(&xdr)->x_private) - ((size_t)(&xdr)->x_base));
+ret:
+        return ret;
+
+}
+int
+auth_glusterfs_v2_request_init (rpcsvc_request_t *req, void *priv)
+{
+        if (!req)
+                return -1;
+        memset (req->verf.authdata, 0, GF_MAX_AUTH_BYTES);
+        req->verf.datalen = 0;
+        req->verf.flavour = AUTH_NULL;
+
+        return 0;
+}
+
+int auth_glusterfs_v2_authenticate (rpcsvc_request_t *req, void *priv)
+{
+        struct auth_glusterfs_parms_v2  au = {0,};
+        int ret = RPCSVC_AUTH_REJECT;
+        int i   = 0;
+
+        if (!req)
+                return ret;
+
+        ret = xdr_to_glusterfs_auth_v2 (req->cred.authdata, &au);
+        if (ret == -1) {
+                gf_log ("", GF_LOG_WARNING,
+                        "failed to decode glusterfs credentials");
+                ret = RPCSVC_AUTH_REJECT;
+                goto err;
+        }
+
+        req->pid = au.pid;
+        req->uid = au.uid;
+        req->gid = au.gid;
+        req->lk_owner.len = au.lk_owner.lk_owner_len;
+        req->auxgidcount = au.groups.groups_len;
+
+        if (req->auxgidcount > GF_MAX_AUX_GROUPS) {
+                gf_log ("", GF_LOG_WARNING,
+                        "more than max aux gids found (%d) , truncating it "
+                        "to %d and continuing", au.groups.groups_len,
+                        GF_MAX_AUX_GROUPS);
+                req->auxgidcount = GF_MAX_AUX_GROUPS;
+        }
+
+        if (req->lk_owner.len > GF_MAX_LOCK_OWNER_LEN) {
+                gf_log ("", GF_LOG_WARNING,
+                        "lkowner field > 1k, failing authentication");
+                ret = RPCSVC_AUTH_REJECT;
+                goto err;
+        }
+
+        for (i = 0; i < req->auxgidcount; ++i)
+                req->auxgids[i] = au.groups.groups_val[i];
+
+        for (i = 0; i < au.lk_owner.lk_owner_len; ++i)
+                req->lk_owner.data[i] = au.lk_owner.lk_owner_val[i];
+
+        gf_log (GF_RPCSVC, GF_LOG_TRACE, "Auth Info: pid: %u, uid: %d"
+                ", gid: %d, owner: %s",
+                req->pid, req->uid, req->gid, lkowner_utoa (&req->lk_owner));
+        ret = RPCSVC_AUTH_ACCEPT;
+err:
+        return ret;
+}
+
+rpcsvc_auth_ops_t auth_glusterfs_ops_v2 = {
+        .transport_init         = NULL,
+        .request_init           = auth_glusterfs_v2_request_init,
+        .authenticate           = auth_glusterfs_v2_authenticate
+};
+
+rpcsvc_auth_t rpcsvc_auth_glusterfs_v2 = {
+        .authname       = "AUTH_GLUSTERFS-v2",
+        .authnum        = AUTH_GLUSTERFS_v2,
+        .authops        = &auth_glusterfs_ops_v2,
+        .authprivate    = NULL
+};
+
+
+rpcsvc_auth_t *
+rpcsvc_auth_glusterfs_v2_init (rpcsvc_t *svc, dict_t *options)
+{
+        return &rpcsvc_auth_glusterfs_v2;
+}
diff --git a/rpc/rpc-lib/src/auth-null.c b/rpc/rpc-lib/src/auth-null.c
index ee50ab66921..aa6b4c1bdbd 100644
--- a/rpc/rpc-lib/src/auth-null.c
+++ b/rpc/rpc-lib/src/auth-null.c
@@ -34,10 +34,10 @@ auth_null_request_init (rpcsvc_request_t *req, void *priv)
         if (!req)
                 return -1;
 
-        memset (req->cred.authdata, 0, RPCSVC_MAX_AUTH_BYTES);
+        memset (req->cred.authdata, 0, GF_MAX_AUTH_BYTES);
         req->cred.datalen = 0;
 
-        memset (req->verf.authdata, 0, RPCSVC_MAX_AUTH_BYTES);
+        memset (req->verf.authdata, 0, GF_MAX_AUTH_BYTES);
         req->verf.datalen = 0;
 
         return 0;
diff --git a/rpc/rpc-lib/src/auth-unix.c b/rpc/rpc-lib/src/auth-unix.c
index c48743db937..c3b58945a56 100644
--- a/rpc/rpc-lib/src/auth-unix.c
+++ b/rpc/rpc-lib/src/auth-unix.c
@@ -35,7 +35,7 @@ auth_unix_request_init (rpcsvc_request_t *req, void *priv)
 {
         if (!req)
                 return -1;
-        memset (req->verf.authdata, 0, RPCSVC_MAX_AUTH_BYTES);
+        memset (req->verf.authdata, 0, GF_MAX_AUTH_BYTES);
         req->verf.datalen = 0;
         req->verf.flavour = AUTH_NULL;
 
diff --git a/rpc/rpc-lib/src/rpc-clnt.c b/rpc/rpc-lib/src/rpc-clnt.c
index 43791dc57e1..e21aac75529 100644
--- a/rpc/rpc-lib/src/rpc-clnt.c
+++ b/rpc/rpc-lib/src/rpc-clnt.c
@@ -32,6 +32,7 @@
 #include "protocol-common.h"
 #include "mem-pool.h"
 #include "xdr-rpc.h"
+#include "rpc-common-xdr.h"
 
 void
 rpc_clnt_reply_deinit (struct rpc_req *req, struct mem_pool *pool);
@@ -1091,7 +1092,7 @@ rpc_clnt_register_notify (struct rpc_clnt *rpc, rpc_clnt_notify_t fn,
 }
 
 ssize_t
-xdr_serialize_glusterfs_auth (char *dest, struct auth_glusterfs_parms *au)
+xdr_serialize_glusterfs_auth (char *dest, struct auth_glusterfs_parms_v2 *au)
 {
         ssize_t ret = -1;
         XDR     xdr;
@@ -1099,10 +1100,9 @@ xdr_serialize_glusterfs_auth (char *dest, struct auth_glusterfs_parms *au)
         if ((!dest) || (!au))
                 return -1;
 
-        xdrmem_create (&xdr, dest, 1024,
-                       XDR_ENCODE);
+        xdrmem_create (&xdr, dest, GF_MAX_AUTH_BYTES, XDR_ENCODE);
 
-        if (!xdr_auth_glusterfs_parms (&xdr, au)) {
+        if (!xdr_auth_glusterfs_parms_v2 (&xdr, au)) {
                 gf_log (THIS->name, GF_LOG_WARNING,
                         "failed to encode auth glusterfs elements");
                 ret = -1;
@@ -1118,7 +1118,7 @@ ret:
 
 int
 rpc_clnt_fill_request (int prognum, int progver, int procnum, int payload,
-                       uint64_t xid, struct auth_glusterfs_parms *au,
+                       uint64_t xid, struct auth_glusterfs_parms_v2 *au,
                        struct rpc_msg *request, char *auth_data)
 {
         int   ret          = -1;
@@ -1146,7 +1146,7 @@ rpc_clnt_fill_request (int prognum, int progver, int procnum, int payload,
                 goto out;
         }
 
-        request->rm_call.cb_cred.oa_flavor = AUTH_GLUSTERFS;
+        request->rm_call.cb_cred.oa_flavor = AUTH_GLUSTERFS_v2;
         request->rm_call.cb_cred.oa_base   = auth_data;
         request->rm_call.cb_cred.oa_length = ret;
 
@@ -1198,16 +1198,16 @@ out:
 struct iobuf *
 rpc_clnt_record_build_record (struct rpc_clnt *clnt, int prognum, int progver,
                               int procnum, size_t payload, uint64_t xid,
-                              struct auth_glusterfs_parms *au,
+                              struct auth_glusterfs_parms_v2 *au,
                               struct iovec *recbuf)
 {
-        struct rpc_msg           request                            = {0, };
-        struct iobuf            *request_iob                        = NULL;
-        char                    *record                             = NULL;
-        struct iovec             recordhdr                          = {0, };
-        size_t                   pagesize                           = 0;
-        int                      ret                                = -1;
-        char                     auth_data[RPC_CLNT_MAX_AUTH_BYTES] = {0, };
+        struct rpc_msg  request                      = {0, };
+        struct iobuf   *request_iob                  = NULL;
+        char           *record                       = NULL;
+        struct iovec    recordhdr                    = {0, };
+        size_t          pagesize                     = 0;
+        int             ret                          = -1;
+        char            auth_data[GF_MAX_AUTH_BYTES] = {0, };
 
         if ((!clnt) || (!recbuf) || (!au)) {
                 goto out;
@@ -1237,8 +1237,6 @@ rpc_clnt_record_build_record (struct rpc_clnt *clnt, int prognum, int progver,
         recordhdr = rpc_clnt_record_build_header (record, pagesize, &request,
                                                   payload);
 
-        //GF_FREE (request.rm_call.cb_cred.oa_base);
-
         if (!recordhdr.iov_base) {
                 gf_log (clnt->conn.trans->name, GF_LOG_ERROR,
                         "Failed to build record header");
@@ -1261,29 +1259,38 @@ rpc_clnt_record (struct rpc_clnt *clnt, call_frame_t *call_frame,
                  rpc_clnt_prog_t *prog,int procnum, size_t payload_len,
                  struct iovec *rpchdr, uint64_t callid)
 {
-        struct auth_glusterfs_parms  au                    = {0, };
-        struct iobuf                *request_iob           = NULL;
+        struct auth_glusterfs_parms_v2  au          = {0, };
+        struct iobuf                   *request_iob = NULL;
+        char                            owner[4] = {0,};
 
         if (!prog || !rpchdr || !call_frame) {
                 goto out;
         }
 
-        au.pid      = call_frame->root->pid;
-        au.uid      = call_frame->root->uid;
-        au.gid      = call_frame->root->gid;
-        au.ngrps    = call_frame->root->ngrps;
-        au.lk_owner = call_frame->root->lk_owner;
-        if (!au.lk_owner)
-                au.lk_owner = au.pid;
+        au.pid                   = call_frame->root->pid;
+        au.uid                   = call_frame->root->uid;
+        au.gid                   = call_frame->root->gid;
+        au.groups.groups_len     = call_frame->root->ngrps;
+        au.lk_owner.lk_owner_len = call_frame->root->lk_owner.len;
 
-        gf_log (clnt->conn.trans->name, GF_LOG_TRACE, "Auth Info: pid: %u, uid: %d"
-                ", gid: %d, owner: %"PRId64,
-                au.pid, au.uid, au.gid, au.lk_owner);
+        if (au.groups.groups_len)
+                au.groups.groups_val = call_frame->root->groups;
 
-        memcpy (au.groups, call_frame->root->groups, sizeof (au.groups));
+        if (call_frame->root->lk_owner.len)
+                au.lk_owner.lk_owner_val = call_frame->root->lk_owner.data;
+        else {
+                owner[0] = (char)(au.pid & 0xff);
+                owner[1] = (char)((au.pid >> 8) & 0xff);
+                owner[2] = (char)((au.pid >> 16) & 0xff);
+                owner[3] = (char)((au.pid >> 24) & 0xff);
 
-        //rpc_transport_get_myname (clnt->conn.trans, myname, UNIX_PATH_MAX);
-        //au.aup_machname = myname;
+                au.lk_owner.lk_owner_val = owner;
+                au.lk_owner.lk_owner_len = 4;
+        }
+
+        gf_log (clnt->conn.trans->name, GF_LOG_TRACE, "Auth Info: pid: %u, uid: %d"
+                ", gid: %d, owner: %s", au.pid, au.uid, au.gid,
+                lkowner_utoa (&call_frame->root->lk_owner));
 
         /* Assuming the client program would like to speak to the same version of
          * program on server.
diff --git a/rpc/rpc-lib/src/rpc-clnt.h b/rpc/rpc-lib/src/rpc-clnt.h
index e3b2ec3f1a2..7034da70584 100644
--- a/rpc/rpc-lib/src/rpc-clnt.h
+++ b/rpc/rpc-lib/src/rpc-clnt.h
@@ -31,8 +31,6 @@ typedef enum {
         RPC_CLNT_MSG
 } rpc_clnt_event_t;
 
-#define AUTH_GLUSTERFS  5
-#define RPC_CLNT_MAX_AUTH_BYTES 1024
 
 #define SFRAME_GET_PROGNUM(sframe) (sframe->rpcreq->prog->prognum)
 #define SFRAME_GET_PROGVER(sframe) (sframe->rpcreq->prog->progver)
@@ -121,11 +119,10 @@ typedef struct rpcclnt_cb_program {
 
 
 
-#define RPC_MAX_AUTH_BYTES   400
 typedef struct rpc_auth_data {
-        int             flavour;
-        int             datalen;
-        char            authdata[RPC_MAX_AUTH_BYTES];
+        int  flavour;
+        int  datalen;
+        char authdata[GF_MAX_AUTH_BYTES];
 } rpc_auth_data_t;
 
 
diff --git a/rpc/rpc-lib/src/rpc-common.c b/rpc/rpc-lib/src/rpc-common.c
deleted file mode 100644
index ff8785c6700..00000000000
--- a/rpc/rpc-lib/src/rpc-common.c
+++ /dev/null
@@ -1,141 +0,0 @@
-/*
-  Copyright (c) 2010-2011 Gluster, Inc. <http://www.gluster.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/>.
-*/
-
-
-#include "logging.h"
-#include "xdr-common.h"
-
-ssize_t
-xdr_serialize_generic (struct iovec outmsg, void *res, xdrproc_t proc)
-{
-        ssize_t ret = -1;
-        XDR     xdr;
-
-        if ((!outmsg.iov_base) || (!res) || (!proc))
-                return -1;
-
-        xdrmem_create (&xdr, outmsg.iov_base, (unsigned int)outmsg.iov_len,
-                       XDR_ENCODE);
-
-        if (!proc (&xdr, res)) {
-                gf_log_callingfn ("xdr", GF_LOG_WARNING,
-                                  "XDR encoding failed");
-                ret = -1;
-                goto ret;
-        }
-
-        ret = xdr_encoded_length (xdr);
-
-ret:
-        return ret;
-}
-
-
-ssize_t
-xdr_to_generic (struct iovec inmsg, void *args, xdrproc_t proc)
-{
-        XDR     xdr;
-        ssize_t ret = -1;
-
-        if ((!inmsg.iov_base) || (!args) || (!proc))
-                return -1;
-
-        xdrmem_create (&xdr, inmsg.iov_base, (unsigned int)inmsg.iov_len,
-                       XDR_DECODE);
-
-        if (!proc (&xdr, args)) {
-                gf_log_callingfn ("xdr", GF_LOG_WARNING,
-                                  "XDR decoding failed");
-                ret  = -1;
-                goto ret;
-        }
-
-        ret = xdr_decoded_length (xdr);
-ret:
-        return ret;
-}
-
-
-bool_t
-xdr_gf_dump_req (XDR *xdrs, gf_dump_req *objp)
-{
-	 if (!xdr_u_quad_t (xdrs, &objp->gfs_id))
-		 return FALSE;
-	return TRUE;
-}
-
-bool_t
-xdr_gf_prog_detail (XDR *xdrs, gf_prog_detail *objp)
-{
-	 if (!xdr_string (xdrs, &objp->progname, ~0))
-		 return FALSE;
-	 if (!xdr_u_quad_t (xdrs, &objp->prognum))
-		 return FALSE;
-	 if (!xdr_u_quad_t (xdrs, &objp->progver))
-		 return FALSE;
-	 if (!xdr_pointer (xdrs, (char **)&objp->next, sizeof (gf_prog_detail),
-                           (xdrproc_t) xdr_gf_prog_detail))
-		 return FALSE;
-	return TRUE;
-}
-
-bool_t
-xdr_gf_dump_rsp (XDR *xdrs, gf_dump_rsp *objp)
-{
-	 if (!xdr_u_quad_t (xdrs, &objp->gfs_id))
-		 return FALSE;
-	 if (!xdr_int (xdrs, &objp->op_ret))
-		 return FALSE;
-	 if (!xdr_int (xdrs, &objp->op_errno))
-		 return FALSE;
-	 if (!xdr_pointer (xdrs, (char **)&objp->prog, sizeof (gf_prog_detail),
-                           (xdrproc_t) xdr_gf_prog_detail))
-		 return FALSE;
-	return TRUE;
-}
-
-
-ssize_t
-xdr_serialize_dump_rsp (struct iovec outmsg, void *rsp)
-{
-        return xdr_serialize_generic (outmsg, (void *)rsp,
-                                      (xdrproc_t)xdr_gf_dump_rsp);
-}
-
-ssize_t
-xdr_to_dump_req (struct iovec inmsg, void *args)
-{
-        return xdr_to_generic (inmsg, (void *)args,
-                               (xdrproc_t)xdr_gf_dump_req);
-}
-
-
-ssize_t
-xdr_from_dump_req (struct iovec outmsg, void *rsp)
-{
-        return xdr_serialize_generic (outmsg, (void *)rsp,
-                                      (xdrproc_t)xdr_gf_dump_req);
-}
-
-ssize_t
-xdr_to_dump_rsp (struct iovec inmsg, void *args)
-{
-        return xdr_to_generic (inmsg, (void *)args,
-                               (xdrproc_t)xdr_gf_dump_rsp);
-}
diff --git a/rpc/rpc-lib/src/rpcsvc-auth.c b/rpc/rpc-lib/src/rpcsvc-auth.c
index d62bd100be5..930eabdda74 100644
--- a/rpc/rpc-lib/src/rpcsvc-auth.c
+++ b/rpc/rpc-lib/src/rpcsvc-auth.c
@@ -29,6 +29,8 @@ rpcsvc_auth_unix_init (rpcsvc_t *svc, dict_t *options);
 
 extern rpcsvc_auth_t *
 rpcsvc_auth_glusterfs_init (rpcsvc_t *svc, dict_t *options);
+extern rpcsvc_auth_t *
+rpcsvc_auth_glusterfs_v2_init (rpcsvc_t *svc, dict_t *options);
 
 int
 rpcsvc_auth_add_initer (struct list_head *list, char *idfier,
@@ -66,6 +68,16 @@ rpcsvc_auth_add_initers (rpcsvc_t *svc)
                 goto err;
         }
 
+
+        ret = rpcsvc_auth_add_initer (&svc->authschemes, "auth-glusterfs-v2",
+                                      (rpcsvc_auth_initer_t)
+                                      rpcsvc_auth_glusterfs_v2_init);
+        if (ret == -1) {
+                gf_log (GF_RPCSVC, GF_LOG_ERROR,
+                        "Failed to add AUTH_GLUSTERFS-v2");
+                goto err;
+        }
+
         ret = rpcsvc_auth_add_initer (&svc->authschemes, "auth-unix",
                                       (rpcsvc_auth_initer_t)
                                       rpcsvc_auth_unix_init);
@@ -434,8 +446,12 @@ rpcsvc_auth_unix_auxgids (rpcsvc_request_t *req, int *arrlen)
                 return NULL;
 
         /* In case of AUTH_NULL auxgids are not used */
-        if ((req->cred.flavour != AUTH_UNIX) &&
-            (req->cred.flavour != AUTH_GLUSTERFS)) {
+        switch (req->cred.flavour) {
+        case AUTH_UNIX:
+        case AUTH_GLUSTERFS:
+        case AUTH_GLUSTERFS_v2:
+                break;
+        default:
                 gf_log ("rpc", GF_LOG_DEBUG, "auth type not unix or glusterfs");
                 return NULL;
         }
diff --git a/rpc/rpc-lib/src/rpcsvc.c b/rpc/rpc-lib/src/rpcsvc.c
index 5805f8a5cd6..e0fc2918473 100644
--- a/rpc/rpc-lib/src/rpcsvc.c
+++ b/rpc/rpc-lib/src/rpcsvc.c
@@ -34,6 +34,8 @@
 #include "iobuf.h"
 #include "globals.h"
 #include "xdr-common.h"
+#include "xdr-generic.h"
+#include "rpc-common-xdr.h"
 
 #include <errno.h>
 #include <pthread.h>
@@ -1687,7 +1689,7 @@ fail:
         iov.iov_base = rsp_buf;
         iov.iov_len  = dump_rsp_len;
 
-        ret = xdr_serialize_dump_rsp (iov, &rsp);
+        ret = xdr_serialize_generic (iov, &rsp, (xdrproc_t)xdr_gf_dump_rsp);
         if (ret < 0) {
                 if (req)
                         req->rpc_err = GARBAGE_ARGS;
diff --git a/rpc/rpc-lib/src/rpcsvc.h b/rpc/rpc-lib/src/rpcsvc.h
index 83aa33f8067..b1547670484 100644
--- a/rpc/rpc-lib/src/rpcsvc.h
+++ b/rpc/rpc-lib/src/rpcsvc.h
@@ -43,10 +43,6 @@
 #include <rpc/rpc_msg.h>
 #include "compat.h"
 
-#ifndef NGRPS
-#define NGRPS 16
-#endif /* !NGRPS */
-
 #ifndef MAX_IOVEC
 #define MAX_IOVEC 16
 #endif
@@ -115,8 +111,6 @@
 #define AUTH_KERB       4               /* kerberos style */
 #endif /* */
 
-#define AUTH_GLUSTERFS  5
-
 typedef struct rpcsvc_program rpcsvc_program_t;
 
 struct rpcsvc_notify_wrapper {
@@ -143,11 +137,10 @@ struct rpcsvc_config {
         int    max_block_size;
 };
 
-#define RPCSVC_MAX_AUTH_BYTES   400
 typedef struct rpcsvc_auth_data {
         int             flavour;
         int             datalen;
-        char            authdata[RPCSVC_MAX_AUTH_BYTES];
+        char            authdata[GF_MAX_AUTH_BYTES];
 } rpcsvc_auth_data_t;
 
 #define rpcsvc_auth_flavour(au)    ((au).flavour)
@@ -184,13 +177,13 @@ struct rpcsvc_request {
         gid_t                   gid;
         pid_t                   pid;
 
-        uint64_t                lk_owner;
+        gf_lkowner_t            lk_owner;
         uint64_t                gfs_id;
 
         /* Might want to move this to AUTH_UNIX specific state since this array
          * is not available for every authentication scheme.
          */
-        gid_t                   auxgids[NGRPS];
+        gid_t                   auxgids[GF_MAX_AUX_GROUPS];
         int                     auxgidcount;
 
 
diff --git a/rpc/rpc-lib/src/xdr-common.h b/rpc/rpc-lib/src/xdr-common.h
index 8402a62225e..d5198d20f47 100644
--- a/rpc/rpc-lib/src/xdr-common.h
+++ b/rpc/rpc-lib/src/xdr-common.h
@@ -34,7 +34,6 @@
 #include <dirent.h>
 #endif /* __NetBSD__ */
 
-
 enum gf_dump_procnum {
         GF_DUMP_NULL,
         GF_DUMP_DUMP,
@@ -44,6 +43,7 @@ enum gf_dump_procnum {
 #define GLUSTER_DUMP_PROGRAM 123451501 /* Completely random */
 #define GLUSTER_DUMP_VERSION 1
 
+#define GF_MAX_AUTH_BYTES   2048
 
 #if GF_DARWIN_HOST_OS
 #define xdr_u_quad_t xdr_u_int64_t
@@ -67,52 +67,6 @@ enum gf_dump_procnum {
 #define xdr_uint32_t xdr_uint32_t
 #endif
 
-struct auth_glusterfs_parms {
-	uint64_t lk_owner;
-	u_int pid;
-	u_int uid;
-	u_int gid;
-	u_int ngrps;
-	u_int groups[16];
-} __attribute__((packed));
-typedef struct auth_glusterfs_parms auth_glusterfs_parms;
-
-struct gf_dump_req {
-	uint64_t gfs_id;
-} __attribute__((packed));
-typedef struct gf_dump_req gf_dump_req;
-
-struct gf_prog_detail {
-	char    *progname;
-	uint64_t prognum;
-	uint64_t progver;
-	struct gf_prog_detail *next;
-} __attribute__((packed));
-typedef struct gf_prog_detail gf_prog_detail;
-
-struct gf_dump_rsp {
-	uint64_t gfs_id;
-	int op_ret;
-	int op_errno;
-	struct gf_prog_detail *prog;
-}__attribute__((packed));
-typedef struct gf_dump_rsp gf_dump_rsp;
-
-extern bool_t
-xdr_auth_glusterfs_parms (XDR *xdrs, auth_glusterfs_parms *objp);
-extern bool_t xdr_gf_dump_req (XDR *, gf_dump_req*);
-extern bool_t xdr_gf_prog_detail (XDR *, gf_prog_detail*);
-extern bool_t xdr_gf_dump_rsp (XDR *, gf_dump_rsp*);
-
-ssize_t
-xdr_serialize_dump_rsp (struct iovec outmsg, void *rsp);
-ssize_t
-xdr_to_dump_req (struct iovec inmsg, void *args);
-ssize_t
-xdr_from_dump_req (struct iovec outmsg, void *rsp);
-ssize_t
-xdr_to_dump_rsp (struct iovec inmsg, void *args);
-
 /* Returns the address of the byte that follows the
  * last byte used for decoding the previous xdr component.
  * E.g. once the RPC call for NFS has been decoded, the macro will return
diff --git a/rpc/rpc-lib/src/xdr-rpc.h b/rpc/rpc-lib/src/xdr-rpc.h
index 99ad888361c..226f8e8b356 100644
--- a/rpc/rpc-lib/src/xdr-rpc.h
+++ b/rpc/rpc-lib/src/xdr-rpc.h
@@ -17,7 +17,7 @@
   <http://www.gnu.org/licenses/>.
 */
 
-#ifndef _XDR_RPC_H
+#ifndef _XDR_RPC_H_
 #define _XDR_RPC_H_
 
 #ifndef _CONFIG_H
@@ -39,6 +39,13 @@
 #include <rpc/xdr.h>
 #include <sys/uio.h>
 
+#include "xdr-common.h"
+
+typedef enum {
+        AUTH_GLUSTERFS = 5,
+        AUTH_GLUSTERFS_v2 = 6,
+} gf_rpc_authtype_t;
+
 /* Converts a given network buffer from its XDR format to a structure
  * that contains everything an RPC call needs to work.
  */
diff --git a/rpc/rpc-transport/rdma/src/Makefile.am b/rpc/rpc-transport/rdma/src/Makefile.am
index bc888b1750c..b4b940bca25 100644
--- a/rpc/rpc-transport/rdma/src/Makefile.am
+++ b/rpc/rpc-transport/rdma/src/Makefile.am
@@ -15,6 +15,6 @@ noinst_HEADERS = rdma.h name.h
 
 AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS)  \
 	-I$(top_srcdir)/libglusterfs/src -I$(top_srcdir)/rpc/rpc-lib/src/ \
-	-I$(top_srcdir)/xlators/protocol/lib/src -shared -nostartfiles $(GF_CFLAGS)
+	-I$(top_srcdir)/rpc/xdr/src -shared -nostartfiles $(GF_CFLAGS)
 
 CLEANFILES = *~
diff --git a/rpc/xdr/src/Makefile.am b/rpc/xdr/src/Makefile.am
index cabab3db62d..57c19338782 100644
--- a/rpc/xdr/src/Makefile.am
+++ b/rpc/xdr/src/Makefile.am
@@ -9,14 +9,14 @@ libgfxdr_la_CPPFLAGS = -D_FILE_OFFSET_BITS=64 -D__USE_FILE_OFFSET64 \
 libgfxdr_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la \
 		$(top_builddir)/rpc/rpc-lib/src/libgfrpc.la
 
-libgfxdr_la_SOURCES =  xdr-generic.c \
+libgfxdr_la_SOURCES =  xdr-generic.c rpc-common-xdr.c \
 			glusterfs3-xdr.c \
 			cli1-xdr.c \
 			glusterd1-xdr.c \
 			portmap-xdr.c \
 			xdr-nfs3.c msg-nfs3.c
 
-noinst_HEADERS = xdr-generic.h \
+noinst_HEADERS = xdr-generic.h rpc-common-xdr.h \
 		glusterfs3-xdr.h glusterfs3.h \
 		cli1-xdr.h \
 		glusterd1-xdr.h \
diff --git a/rpc/xdr/src/glusterfs3-xdr.c b/rpc/xdr/src/glusterfs3-xdr.c
index 64e504f46f6..62cff241d77 100644
--- a/rpc/xdr/src/glusterfs3-xdr.c
+++ b/rpc/xdr/src/glusterfs3-xdr.c
@@ -80,7 +80,7 @@ xdr_gf_proto_flock (XDR *xdrs, gf_proto_flock *objp)
 		 return FALSE;
 	 if (!xdr_u_int (xdrs, &objp->pid))
 		 return FALSE;
-	 if (!xdr_u_quad_t (xdrs, &objp->owner))
+	 if (!xdr_bytes (xdrs, (char **)&objp->lk_owner.lk_owner_val, (u_int *) &objp->lk_owner.lk_owner_len, ~0))
 		 return FALSE;
 	return TRUE;
 }
diff --git a/rpc/xdr/src/glusterfs3-xdr.h b/rpc/xdr/src/glusterfs3-xdr.h
index 0c8af17d2cf..d9cf7926f96 100644
--- a/rpc/xdr/src/glusterfs3-xdr.h
+++ b/rpc/xdr/src/glusterfs3-xdr.h
@@ -63,7 +63,10 @@ struct gf_proto_flock {
 	u_quad_t start;
 	u_quad_t len;
 	u_int pid;
-	u_quad_t owner;
+	struct {
+		u_int lk_owner_len;
+		char *lk_owner_val;
+	} lk_owner;
 };
 typedef struct gf_proto_flock gf_proto_flock;
 
diff --git a/rpc/xdr/src/glusterfs3-xdr.x b/rpc/xdr/src/glusterfs3-xdr.x
index 592f7ed70c4..131feff1bab 100644
--- a/rpc/xdr/src/glusterfs3-xdr.x
+++ b/rpc/xdr/src/glusterfs3-xdr.x
@@ -19,7 +19,7 @@ struct gf_proto_flock {
 	unsigned hyper start;
 	unsigned hyper len;
         unsigned int   pid;
-        unsigned hyper owner;
+        opaque         lk_owner<>;
 } ;
 
 
diff --git a/rpc/xdr/src/glusterfs3.h b/rpc/xdr/src/glusterfs3.h
index ba64a0b4508..82a9e200189 100644
--- a/rpc/xdr/src/glusterfs3.h
+++ b/rpc/xdr/src/glusterfs3.h
@@ -197,7 +197,11 @@ gf_proto_flock_to_flock (struct gf_proto_flock *gf_proto_flock, struct gf_flock
 	gf_flock->l_start    = gf_proto_flock->start;
 	gf_flock->l_len      = gf_proto_flock->len;
 	gf_flock->l_pid      = gf_proto_flock->pid;
-	gf_flock->l_owner    = gf_proto_flock->owner;
+        gf_flock->l_owner.len = gf_proto_flock->lk_owner.lk_owner_len;
+        if (gf_flock->l_owner.len &&
+            (gf_flock->l_owner.len < GF_MAX_LOCK_OWNER_LEN))
+                memcpy (gf_flock->l_owner.data, gf_proto_flock->lk_owner.lk_owner_val,
+                        gf_flock->l_owner.len);
 }
 
 
@@ -212,7 +216,9 @@ gf_proto_flock_from_flock (struct gf_proto_flock *gf_proto_flock, struct gf_floc
 	gf_proto_flock->start    =  (gf_flock->l_start);
 	gf_proto_flock->len      =  (gf_flock->l_len);
 	gf_proto_flock->pid      =  (gf_flock->l_pid);
-	gf_proto_flock->owner    =  (gf_flock->l_owner);
+	gf_proto_flock->lk_owner.lk_owner_len =  gf_flock->l_owner.len;
+        if (gf_flock->l_owner.len)
+                gf_proto_flock->lk_owner.lk_owner_val = gf_flock->l_owner.data;
 }
 
 static inline void
diff --git a/rpc/xdr/src/msg-nfs3.c b/rpc/xdr/src/msg-nfs3.c
index d760d43b5d2..5fc92123cee 100644
--- a/rpc/xdr/src/msg-nfs3.c
+++ b/rpc/xdr/src/msg-nfs3.c
@@ -63,84 +63,6 @@ ret:
         return ret;
 }
 
-/*
-ssize_t
-xdr_serialize_generic (struct iovec outmsg, void *res, xdrproc_t proc)
-{
-        ssize_t ret = -1;
-        XDR     xdr;
-
-        if ((!outmsg.iov_base) || (!res) || (!proc))
-                return -1;
-
-        xdrmem_create (&xdr, outmsg.iov_base, (unsigned int)outmsg.iov_len,
-                       XDR_ENCODE);
-
-        if (!proc (&xdr, res)) {
-                ret = -1;
-                goto ret;
-        }
-
-        ret = xdr_encoded_length (xdr);
-
-ret:
-        return ret;
-}
-
-
-ssize_t
-xdr_to_generic (struct iovec inmsg, void *args, xdrproc_t proc)
-{
-        XDR     xdr;
-        ssize_t ret = -1;
-
-        if ((!inmsg.iov_base) || (!args) || (!proc))
-                return -1;
-
-        xdrmem_create (&xdr, inmsg.iov_base, (unsigned int)inmsg.iov_len,
-                       XDR_DECODE);
-
-        if (!proc (&xdr, args)) {
-                ret  = -1;
-                goto ret;
-        }
-
-        ret = xdr_decoded_length (xdr);
-ret:
-        return ret;
-}
-
-
-ssize_t
-xdr_to_generic_payload (struct iovec inmsg, void *args, xdrproc_t proc,
-                            struct iovec *pendingpayload)
-{
-        XDR     xdr;
-        ssize_t ret = -1;
-
-        if ((!inmsg.iov_base) || (!args) || (!proc))
-                return -1;
-
-        xdrmem_create (&xdr, inmsg.iov_base, (unsigned int)inmsg.iov_len,
-                       XDR_DECODE);
-
-        if (!proc (&xdr, args)) {
-                ret  = -1;
-                goto ret;
-        }
-
-        ret = xdr_decoded_length (xdr);
-
-        if (pendingpayload) {
-                pendingpayload->iov_base = xdr_decoded_remaining_addr (xdr);
-                pendingpayload->iov_len = xdr_decoded_remaining_len (xdr);
-        }
-
-ret:
-        return ret;
-}
-*/
-
 /* Translate the mountres3 structure in res into XDR format into memory
  * referenced by outmsg.iov_base.
  * Returns the number of bytes used in encoding into XDR format.
diff --git a/rpc/xdr/src/rpc-common-xdr.c b/rpc/xdr/src/rpc-common-xdr.c
new file mode 100644
index 00000000000..14ddea71537
--- /dev/null
+++ b/rpc/xdr/src/rpc-common-xdr.c
@@ -0,0 +1,232 @@
+/*
+  Copyright (c) 2007-2011 Gluster, Inc. <http://www.gluster.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/>.
+*/
+
+#include "xdr-common.h"
+#include "compat.h"
+
+#if defined(__GNUC__)
+#if __GNUC__ >= 4
+#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
+#endif
+#endif
+
+/*
+ * Please do not edit this file.
+ * It was generated using rpcgen.
+ */
+
+#include "rpc-common-xdr.h"
+
+bool_t
+xdr_auth_glusterfs_parms_v2 (XDR *xdrs, auth_glusterfs_parms_v2 *objp)
+{
+	register int32_t *buf;
+        buf = NULL;
+
+
+	if (xdrs->x_op == XDR_ENCODE) {
+		buf = XDR_INLINE (xdrs, 3 * BYTES_PER_XDR_UNIT);
+		if (buf == NULL) {
+			 if (!xdr_int (xdrs, &objp->pid))
+				 return FALSE;
+			 if (!xdr_u_int (xdrs, &objp->uid))
+				 return FALSE;
+			 if (!xdr_u_int (xdrs, &objp->gid))
+				 return FALSE;
+
+		} else {
+		IXDR_PUT_LONG(buf, objp->pid);
+		IXDR_PUT_U_LONG(buf, objp->uid);
+		IXDR_PUT_U_LONG(buf, objp->gid);
+		}
+		 if (!xdr_array (xdrs, (char **)&objp->groups.groups_val, (u_int *) &objp->groups.groups_len, ~0,
+			sizeof (u_int), (xdrproc_t) xdr_u_int))
+			 return FALSE;
+		 if (!xdr_bytes (xdrs, (char **)&objp->lk_owner.lk_owner_val, (u_int *) &objp->lk_owner.lk_owner_len, ~0))
+			 return FALSE;
+		return TRUE;
+	} else if (xdrs->x_op == XDR_DECODE) {
+		buf = XDR_INLINE (xdrs, 3 * BYTES_PER_XDR_UNIT);
+		if (buf == NULL) {
+			 if (!xdr_int (xdrs, &objp->pid))
+				 return FALSE;
+			 if (!xdr_u_int (xdrs, &objp->uid))
+				 return FALSE;
+			 if (!xdr_u_int (xdrs, &objp->gid))
+				 return FALSE;
+
+		} else {
+		objp->pid = IXDR_GET_LONG(buf);
+		objp->uid = IXDR_GET_U_LONG(buf);
+		objp->gid = IXDR_GET_U_LONG(buf);
+		}
+		 if (!xdr_array (xdrs, (char **)&objp->groups.groups_val, (u_int *) &objp->groups.groups_len, ~0,
+			sizeof (u_int), (xdrproc_t) xdr_u_int))
+			 return FALSE;
+		 if (!xdr_bytes (xdrs, (char **)&objp->lk_owner.lk_owner_val, (u_int *) &objp->lk_owner.lk_owner_len, ~0))
+			 return FALSE;
+	 return TRUE;
+	}
+
+	 if (!xdr_int (xdrs, &objp->pid))
+		 return FALSE;
+	 if (!xdr_u_int (xdrs, &objp->uid))
+		 return FALSE;
+	 if (!xdr_u_int (xdrs, &objp->gid))
+		 return FALSE;
+	 if (!xdr_array (xdrs, (char **)&objp->groups.groups_val, (u_int *) &objp->groups.groups_len, ~0,
+		sizeof (u_int), (xdrproc_t) xdr_u_int))
+		 return FALSE;
+	 if (!xdr_bytes (xdrs, (char **)&objp->lk_owner.lk_owner_val, (u_int *) &objp->lk_owner.lk_owner_len, ~0))
+		 return FALSE;
+	return TRUE;
+}
+
+bool_t
+xdr_auth_glusterfs_parms (XDR *xdrs, auth_glusterfs_parms *objp)
+{
+	register int32_t *buf;
+        int i;
+        buf = NULL;
+
+
+	if (xdrs->x_op == XDR_ENCODE) {
+		 if (!xdr_u_quad_t (xdrs, &objp->lk_owner))
+			 return FALSE;
+		buf = XDR_INLINE (xdrs, (4 +  16 )* BYTES_PER_XDR_UNIT);
+		if (buf == NULL) {
+			 if (!xdr_u_int (xdrs, &objp->pid))
+				 return FALSE;
+			 if (!xdr_u_int (xdrs, &objp->uid))
+				 return FALSE;
+			 if (!xdr_u_int (xdrs, &objp->gid))
+				 return FALSE;
+			 if (!xdr_u_int (xdrs, &objp->ngrps))
+				 return FALSE;
+			 if (!xdr_vector (xdrs, (char *)objp->groups, 16,
+				sizeof (u_int), (xdrproc_t) xdr_u_int))
+				 return FALSE;
+		} else {
+			IXDR_PUT_U_LONG(buf, objp->pid);
+			IXDR_PUT_U_LONG(buf, objp->uid);
+			IXDR_PUT_U_LONG(buf, objp->gid);
+			IXDR_PUT_U_LONG(buf, objp->ngrps);
+			{
+				register u_int *genp;
+
+				for (i = 0, genp = objp->groups;
+					i < 16; ++i) {
+					IXDR_PUT_U_LONG(buf, *genp++);
+				}
+			}
+		}
+		return TRUE;
+	} else if (xdrs->x_op == XDR_DECODE) {
+		 if (!xdr_u_quad_t (xdrs, &objp->lk_owner))
+			 return FALSE;
+		buf = XDR_INLINE (xdrs, (4 +  16 )* BYTES_PER_XDR_UNIT);
+		if (buf == NULL) {
+			 if (!xdr_u_int (xdrs, &objp->pid))
+				 return FALSE;
+			 if (!xdr_u_int (xdrs, &objp->uid))
+				 return FALSE;
+			 if (!xdr_u_int (xdrs, &objp->gid))
+				 return FALSE;
+			 if (!xdr_u_int (xdrs, &objp->ngrps))
+				 return FALSE;
+			 if (!xdr_vector (xdrs, (char *)objp->groups, 16,
+				sizeof (u_int), (xdrproc_t) xdr_u_int))
+				 return FALSE;
+		} else {
+			objp->pid = IXDR_GET_U_LONG(buf);
+			objp->uid = IXDR_GET_U_LONG(buf);
+			objp->gid = IXDR_GET_U_LONG(buf);
+			objp->ngrps = IXDR_GET_U_LONG(buf);
+			{
+				register u_int *genp;
+
+				for (i = 0, genp = objp->groups;
+					i < 16; ++i) {
+					*genp++ = IXDR_GET_U_LONG(buf);
+				}
+			}
+		}
+	 return TRUE;
+	}
+
+	 if (!xdr_u_quad_t (xdrs, &objp->lk_owner))
+		 return FALSE;
+	 if (!xdr_u_int (xdrs, &objp->pid))
+		 return FALSE;
+	 if (!xdr_u_int (xdrs, &objp->uid))
+		 return FALSE;
+	 if (!xdr_u_int (xdrs, &objp->gid))
+		 return FALSE;
+	 if (!xdr_u_int (xdrs, &objp->ngrps))
+		 return FALSE;
+	 if (!xdr_vector (xdrs, (char *)objp->groups, 16,
+		sizeof (u_int), (xdrproc_t) xdr_u_int))
+		 return FALSE;
+	return TRUE;
+}
+
+bool_t
+xdr_gf_dump_req (XDR *xdrs, gf_dump_req *objp)
+{
+	register int32_t *buf;
+        buf = NULL;
+
+	 if (!xdr_u_quad_t (xdrs, &objp->gfs_id))
+		 return FALSE;
+	return TRUE;
+}
+
+bool_t
+xdr_gf_prog_detail (XDR *xdrs, gf_prog_detail *objp)
+{
+	register int32_t *buf;
+        buf = NULL;
+
+	 if (!xdr_string (xdrs, &objp->progname, ~0))
+		 return FALSE;
+	 if (!xdr_u_quad_t (xdrs, &objp->prognum))
+		 return FALSE;
+	 if (!xdr_u_quad_t (xdrs, &objp->progver))
+		 return FALSE;
+	 if (!xdr_pointer (xdrs, (char **)&objp->next, sizeof (gf_prog_detail), (xdrproc_t) xdr_gf_prog_detail))
+		 return FALSE;
+	return TRUE;
+}
+
+bool_t
+xdr_gf_dump_rsp (XDR *xdrs, gf_dump_rsp *objp)
+{
+	register int32_t *buf;
+        buf = NULL;
+
+	 if (!xdr_u_quad_t (xdrs, &objp->gfs_id))
+		 return FALSE;
+	 if (!xdr_int (xdrs, &objp->op_ret))
+		 return FALSE;
+	 if (!xdr_int (xdrs, &objp->op_errno))
+		 return FALSE;
+	 if (!xdr_pointer (xdrs, (char **)&objp->prog, sizeof (gf_prog_detail), (xdrproc_t) xdr_gf_prog_detail))
+		 return FALSE;
+	return TRUE;
+}
diff --git a/rpc/xdr/src/rpc-common-xdr.h b/rpc/xdr/src/rpc-common-xdr.h
new file mode 100644
index 00000000000..66d9c3772fe
--- /dev/null
+++ b/rpc/xdr/src/rpc-common-xdr.h
@@ -0,0 +1,113 @@
+/*
+  Copyright (c) 2007-2011 Gluster, Inc. <http://www.gluster.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/>.
+*/
+
+#include "xdr-common.h"
+#include "compat.h"
+
+#if defined(__GNUC__)
+#if __GNUC__ >= 4
+#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
+#endif
+#endif
+
+/*
+ * Please do not edit this file.
+ * It was generated using rpcgen.
+ */
+
+#ifndef _RPC_COMMON_XDR_H_RPCGEN
+#define _RPC_COMMON_XDR_H_RPCGEN
+
+#include <rpc/rpc.h>
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+struct auth_glusterfs_parms_v2 {
+	int pid;
+	u_int uid;
+	u_int gid;
+	struct {
+		u_int groups_len;
+		u_int *groups_val;
+	} groups;
+	struct {
+		u_int lk_owner_len;
+		char *lk_owner_val;
+	} lk_owner;
+};
+typedef struct auth_glusterfs_parms_v2 auth_glusterfs_parms_v2;
+
+struct auth_glusterfs_parms {
+	u_quad_t lk_owner;
+	u_int pid;
+	u_int uid;
+	u_int gid;
+	u_int ngrps;
+	u_int groups[16];
+};
+typedef struct auth_glusterfs_parms auth_glusterfs_parms;
+
+struct gf_dump_req {
+	u_quad_t gfs_id;
+};
+typedef struct gf_dump_req gf_dump_req;
+
+struct gf_prog_detail {
+	char *progname;
+	u_quad_t prognum;
+	u_quad_t progver;
+	struct gf_prog_detail *next;
+};
+typedef struct gf_prog_detail gf_prog_detail;
+
+struct gf_dump_rsp {
+	u_quad_t gfs_id;
+	int op_ret;
+	int op_errno;
+	struct gf_prog_detail *prog;
+};
+typedef struct gf_dump_rsp gf_dump_rsp;
+
+/* the xdr functions */
+
+#if defined(__STDC__) || defined(__cplusplus)
+extern  bool_t xdr_auth_glusterfs_parms_v2 (XDR *, auth_glusterfs_parms_v2*);
+extern  bool_t xdr_auth_glusterfs_parms (XDR *, auth_glusterfs_parms*);
+extern  bool_t xdr_gf_dump_req (XDR *, gf_dump_req*);
+extern  bool_t xdr_gf_prog_detail (XDR *, gf_prog_detail*);
+extern  bool_t xdr_gf_dump_rsp (XDR *, gf_dump_rsp*);
+
+#else /* K&R C */
+extern bool_t xdr_auth_glusterfs_parms_v2 ();
+extern bool_t xdr_auth_glusterfs_parms ();
+extern bool_t xdr_gf_dump_req ();
+extern bool_t xdr_gf_prog_detail ();
+extern bool_t xdr_gf_dump_rsp ();
+
+#endif /* K&R C */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !_RPC_COMMON_XDR_H_RPCGEN */
diff --git a/rpc/xdr/src/rpc-common-xdr.x b/rpc/xdr/src/rpc-common-xdr.x
new file mode 100644
index 00000000000..ca28f38b5db
--- /dev/null
+++ b/rpc/xdr/src/rpc-common-xdr.x
@@ -0,0 +1,39 @@
+/* This file has definition of few XDR structures which are
+ * not captured in any section specific file */
+
+struct auth_glusterfs_parms_v2 {
+        int pid;
+        unsigned int uid;
+        unsigned int gid;
+        unsigned int groups<>;
+        opaque lk_owner<>;
+};
+
+struct auth_glusterfs_parms {
+        unsigned hyper lk_owner;
+        unsigned int pid;
+        unsigned int uid;
+	unsigned int gid;
+	unsigned int ngrps;
+	unsigned groups[16];
+};
+
+struct gf_dump_req {
+	unsigned hyper gfs_id;
+};
+
+
+struct gf_prog_detail {
+	string progname<>;
+	unsigned hyper prognum;
+	unsigned hyper progver;
+	struct gf_prog_detail *next;
+};
+
+
+struct gf_dump_rsp {
+        unsigned hyper gfs_id;
+        int op_ret;
+	int op_errno;
+	struct gf_prog_detail *prog;
+};
diff --git a/xlators/cluster/afr/src/afr-lk-common.c b/xlators/cluster/afr/src/afr-lk-common.c
index 41fa8a30bab..2fe1349902c 100644
--- a/xlators/cluster/afr/src/afr-lk-common.c
+++ b/xlators/cluster/afr/src/afr-lk-common.c
@@ -62,7 +62,8 @@ afr_set_lk_owner (call_frame_t *frame, xlator_t *this)
         gf_log (this->name, GF_LOG_TRACE,
                 "Setting lk-owner=%llu",
                 (unsigned long long) (unsigned long)frame->root);
-        frame->root->lk_owner = (uint64_t) (unsigned long)frame->root;
+
+        set_lk_owner_from_ptr (&frame->root->lk_owner, frame->root);
 }
 
 static int
@@ -115,7 +116,7 @@ internal_lock_count (call_frame_t *frame, xlator_t *this)
 
 static void
 afr_print_inodelk (char *str, int size, int cmd,
-                   struct gf_flock *flock, uint64_t owner)
+                   struct gf_flock *flock, gf_lkowner_t *owner)
 {
         char *cmd_str = NULL;
         char *type_str = NULL;
@@ -163,11 +164,11 @@ afr_print_inodelk (char *str, int size, int cmd,
         }
 
         snprintf (str, size, "lock=INODELK, cmd=%s, type=%s, "
-                  "start=%llu, len=%llu, pid=%llu, lk-owner=%llu",
+                  "start=%llu, len=%llu, pid=%llu, lk-owner=%s",
                   cmd_str, type_str, (unsigned long long) flock->l_start,
                   (unsigned long long) flock->l_len,
                   (unsigned long long) flock->l_pid,
-                  (unsigned long long) owner);
+                  lkowner_utoa (owner));
 
 }
 
@@ -183,11 +184,11 @@ afr_print_lockee (char *str, int size, loc_t *loc, fd_t *fd,
 
 void
 afr_print_entrylk (char *str, int size, const char *basename,
-                   uint64_t owner)
+                   gf_lkowner_t *owner)
 {
-        snprintf (str, size, "Basename=%s, lk-owner=%llu",
+        snprintf (str, size, "Basename=%s, lk-owner=%s",
                   basename ? basename : "<nul>",
-                  (unsigned long long)owner);
+                  lkowner_utoa (owner));
 }
 
 static void
@@ -302,7 +303,7 @@ afr_trace_inodelk_in (call_frame_t *frame, afr_lock_call_type_t lock_call_type,
                 return;
         }
 
-        afr_print_inodelk (lock, 256, cmd, flock, frame->root->lk_owner);
+        afr_print_inodelk (lock, 256, cmd, flock, &frame->root->lk_owner);
         afr_print_lockee (lockee, 256, &local->loc, local->fd, child_index);
 
         afr_set_lock_call_type (lock_call_type, lock_call_type_str, int_lock);
@@ -339,7 +340,7 @@ afr_trace_entrylk_in (call_frame_t *frame, afr_lock_call_type_t lock_call_type,
                 return;
         }
 
-        afr_print_entrylk (lock, 256, basename, frame->root->lk_owner);
+        afr_print_entrylk (lock, 256, basename, &frame->root->lk_owner);
         afr_print_lockee (lockee, 256, &local->loc, local->fd, child_index);
 
         afr_set_lock_call_type (lock_call_type, lock_call_type_str, int_lock);
@@ -602,8 +603,8 @@ afr_unlock_inodelk (call_frame_t *frame, xlator_t *this)
         flock.l_type  = F_UNLCK;
 
         gf_log (this->name, GF_LOG_DEBUG, "attempting data unlock range %"PRIu64
-                " %"PRIu64" by %"PRIu64, flock.l_start, flock.l_len,
-                frame->root->lk_owner);
+                " %"PRIu64" by %s", flock.l_start, flock.l_len,
+                lkowner_utoa (&frame->root->lk_owner));
 
         call_count = afr_locked_nodes_count (int_lock->inode_locked_nodes,
                                              priv->child_count);
@@ -1422,8 +1423,8 @@ afr_nonblocking_inodelk (call_frame_t *frame, xlator_t *this)
         flock.l_type  = int_lock->lk_flock.l_type;
 
         gf_log (this->name, GF_LOG_DEBUG, "attempting data lock range %"PRIu64
-                " %"PRIu64" by %"PRIu64, flock.l_start, flock.l_len,
-                frame->root->lk_owner);
+                " %"PRIu64" by %s", flock.l_start, flock.l_len,
+                lkowner_utoa (&frame->root->lk_owner));
 
         full_flock.l_type = int_lock->lk_flock.l_type;
 
diff --git a/xlators/cluster/afr/src/afr-self-heal-data.c b/xlators/cluster/afr/src/afr-self-heal-data.c
index 83920c081b7..c1c1d483e54 100644
--- a/xlators/cluster/afr/src/afr-self-heal-data.c
+++ b/xlators/cluster/afr/src/afr-self-heal-data.c
@@ -395,8 +395,8 @@ afr_sh_data_erase_pending (call_frame_t *frame, xlator_t *this)
 
         afr_sh_pending_to_delta (priv, sh->xattr, sh->delta_matrix, sh->success,
                                  priv->child_count, AFR_DATA_TRANSACTION);
-        gf_log (this->name, GF_LOG_DEBUG, "Delta matrix for: %"PRIu64,
-                frame->root->lk_owner);
+        gf_log (this->name, GF_LOG_DEBUG, "Delta matrix for: %s",
+                lkowner_utoa (&frame->root->lk_owner));
         afr_sh_print_pending_matrix (sh->delta_matrix, this);
 
         erase_xattr = GF_CALLOC (sizeof (*erase_xattr), priv->child_count,
@@ -658,8 +658,9 @@ afr_sh_data_fix (call_frame_t *frame, xlator_t *this)
         sh = &local->self_heal;
         priv = this->private;
 
-        gf_log (this->name, GF_LOG_DEBUG, "Pending matrix for: %"PRIu64,
-                frame->root->lk_owner);
+        gf_log (this->name, GF_LOG_DEBUG, "Pending matrix for: %s",
+                lkowner_utoa (&frame->root->lk_owner));
+
         nsources = afr_build_sources (this, sh->xattr, sh->buf, sh->pending_matrix,
                                       sh->sources, sh->success_children,
                                       AFR_DATA_TRANSACTION, NULL, _gf_false);
@@ -1131,14 +1132,16 @@ afr_sh_data_post_blocking_inodelk_cbk (call_frame_t *frame, xlator_t *this)
 
         if (int_lock->lock_op_ret < 0) {
                 gf_log (this->name, GF_LOG_ERROR, "Blocking data inodelks "
-                        "failed for %s. by %"PRIu64,
-                        local->loc.path, frame->root->lk_owner);
+                        "failed for %s. by %s",
+                        local->loc.path, lkowner_utoa (&frame->root->lk_owner));
+
                 sh->data_lock_failure_handler (frame, this);
         } else {
 
                 gf_log (this->name, GF_LOG_DEBUG, "Blocking data inodelks "
-                        "done for %s by %"PRIu64". Proceding to self-heal",
-                        local->loc.path, frame->root->lk_owner);
+                        "done for %s by %s. Proceding to self-heal",
+                        local->loc.path, lkowner_utoa (&frame->root->lk_owner));
+
                 sh->data_lock_success_handler (frame, this);
         }
 
@@ -1158,15 +1161,16 @@ afr_sh_data_post_nonblocking_inodelk_cbk (call_frame_t *frame, xlator_t *this)
 
         if (int_lock->lock_op_ret < 0) {
                 gf_log (this->name, GF_LOG_DEBUG, "Non Blocking data inodelks "
-                        "failed for %s. by %"PRIu64,
-                        local->loc.path, frame->root->lk_owner);
+                        "failed for %s. by %s",
+                        local->loc.path, lkowner_utoa (&frame->root->lk_owner));
+
                 int_lock->lock_cbk = afr_sh_data_post_blocking_inodelk_cbk;
                 afr_blocking_lock (frame, this);
         } else {
 
                 gf_log (this->name, GF_LOG_DEBUG, "Non Blocking data inodelks "
-                        "done for %s by %"PRIu64". Proceeding to self-heal",
-                        local->loc.path, frame->root->lk_owner);
+                        "done for %s by %s. Proceeding to self-heal",
+                        local->loc.path, lkowner_utoa (&frame->root->lk_owner));
                 sh->data_lock_success_handler (frame, this);
         }
 
diff --git a/xlators/cluster/afr/src/pump.c b/xlators/cluster/afr/src/pump.c
index b92c50e851d..73389009d68 100644
--- a/xlators/cluster/afr/src/pump.c
+++ b/xlators/cluster/afr/src/pump.c
@@ -694,7 +694,7 @@ pump_start (call_frame_t *pump_frame, xlator_t *this)
 	priv = this->private;
         pump_priv = priv->pump_private;
 
-	pump_frame->root->lk_owner = (uint64_t) (unsigned long)pump_frame->root;
+        afr_set_lk_owner (pump_frame, this);
 	pump_pid = (uint64_t) (unsigned long)pump_frame->root;
 
 	ret = synctask_new (pump_priv->env, pump_task,
@@ -708,8 +708,8 @@ pump_start (call_frame_t *pump_frame, xlator_t *this)
         }
 
         gf_log (this->name, GF_LOG_DEBUG,
-                "setting pump as started lk_owner: %"PRIu64" %"PRIu64,
-                pump_frame->root->lk_owner, pump_pid);
+                "setting pump as started lk_owner: %s %"PRIu64,
+                lkowner_utoa (&pump_frame->root->lk_owner), pump_pid);
 
         priv->use_afr_in_pump = 1;
 out:
diff --git a/xlators/features/locks/src/common.c b/xlators/features/locks/src/common.c
index f6b9c331575..0bc7baa3011 100644
--- a/xlators/features/locks/src/common.c
+++ b/xlators/features/locks/src/common.c
@@ -143,9 +143,9 @@ __pl_inode_is_empty (pl_inode_t *pl_inode)
 void
 pl_print_locker (char *str, int size, xlator_t *this, call_frame_t *frame)
 {
-        snprintf (str, size, "Pid=%llu, lk-owner=%llu, Transport=%p, Frame=%llu",
+        snprintf (str, size, "Pid=%llu, lk-owner=%s, Transport=%p, Frame=%llu",
                   (unsigned long long) frame->root->pid,
-                  (unsigned long long) frame->root->lk_owner,
+                  lkowner_utoa (&frame->root->lk_owner),
                   (void *)frame->root->trans,
                   (unsigned long long) frame->root->unique);
 }
@@ -187,7 +187,7 @@ pl_print_lockee (char *str, int size, fd_t *fd, loc_t *loc)
 
 void
 pl_print_lock (char *str, int size, int cmd,
-               struct gf_flock *flock, uint64_t owner)
+               struct gf_flock *flock, gf_lkowner_t *owner)
 {
         char *cmd_str = NULL;
         char *type_str = NULL;
@@ -235,11 +235,11 @@ pl_print_lock (char *str, int size, int cmd,
         }
 
         snprintf (str, size, "lock=FCNTL, cmd=%s, type=%s, "
-                  "start=%llu, len=%llu, pid=%llu, lk-owner=%llu",
+                  "start=%llu, len=%llu, pid=%llu, lk-owner=%s",
                   cmd_str, type_str, (unsigned long long) flock->l_start,
                   (unsigned long long) flock->l_len,
                   (unsigned long long) flock->l_pid,
-                  (unsigned long long) owner);
+                  lkowner_utoa (owner));
 }
 
 
@@ -262,7 +262,7 @@ pl_trace_in (xlator_t *this, call_frame_t *frame, fd_t *fd, loc_t *loc,
         if (domain)
                 pl_print_inodelk (pl_lock, 256, cmd, flock, domain);
         else
-                pl_print_lock (pl_lock, 256, cmd, flock, frame->root->lk_owner);
+                pl_print_lock (pl_lock, 256, cmd, flock, &frame->root->lk_owner);
 
         gf_log (this->name, GF_LOG_INFO,
                 "[REQUEST] Locker = {%s} Lockee = {%s} Lock = {%s}",
@@ -312,7 +312,7 @@ pl_trace_out (xlator_t *this, call_frame_t *frame, fd_t *fd, loc_t *loc,
         if (domain)
                 pl_print_inodelk (pl_lock, 256, cmd, flock, domain);
         else
-                pl_print_lock (pl_lock, 256, cmd, flock, frame->root->lk_owner);
+                pl_print_lock (pl_lock, 256, cmd, flock, &frame->root->lk_owner);
 
         pl_print_verdict (verdict, 32, op_ret, op_errno);
 
@@ -342,7 +342,7 @@ pl_trace_block (xlator_t *this, call_frame_t *frame, fd_t *fd, loc_t *loc,
         if (domain)
                 pl_print_inodelk (pl_lock, 256, cmd, flock, domain);
         else
-                pl_print_lock (pl_lock, 256, cmd, flock, frame->root->lk_owner);
+                pl_print_lock (pl_lock, 256, cmd, flock, &frame->root->lk_owner);
 
         gf_log (this->name, GF_LOG_INFO,
                 "[BLOCKED] Locker = {%s} Lockee = {%s} Lock = {%s}",
@@ -468,7 +468,7 @@ out:
 /* Create a new posix_lock_t */
 posix_lock_t *
 new_posix_lock (struct gf_flock *flock, void *transport, pid_t client_pid,
-                uint64_t owner, fd_t *fd)
+                gf_lkowner_t *owner, fd_t *fd)
 {
         posix_lock_t *lock = NULL;
 
@@ -494,7 +494,7 @@ new_posix_lock (struct gf_flock *flock, void *transport, pid_t client_pid,
         lock->fd_num     = fd_to_fdnum (fd);
         lock->fd         = fd;
         lock->client_pid = client_pid;
-        lock->owner      = owner;
+        lock->owner      = *owner;
 
         INIT_LIST_HEAD (&lock->list);
 
@@ -569,8 +569,8 @@ int
 same_owner (posix_lock_t *l1, posix_lock_t *l2)
 {
 
-                return ((l1->owner == l2->owner) &&
-                        (l1->transport  == l2->transport));
+        return (is_same_lkowner (&l1->owner, &l2->owner) &&
+                (l1->transport  == l2->transport));
 
 }
 
@@ -889,10 +889,9 @@ __grant_blocked_locks (xlator_t *this, pl_inode_t *pl_inode, struct list_head *g
                         posix_lock_to_flock (l, &conf->user_flock);
 
                         gf_log (this->name, GF_LOG_TRACE,
-                                "%s (pid=%d) lk-owner:%"PRIu64" %"PRId64" - %"PRId64" => Granted",
+                                "%s (pid=%d) lk-owner:%s %"PRId64" - %"PRId64" => Granted",
                                 l->fl_type == F_UNLCK ? "Unlock" : "Lock",
-                                l->client_pid,
-                                l->owner,
+                                l->client_pid, lkowner_utoa (&l->owner),
                                 l->user_flock.l_start,
                                 l->user_flock.l_len);
 
@@ -958,7 +957,7 @@ pl_send_prelock_unlock (xlator_t *this, pl_inode_t *pl_inode,
 
 
         unlock_lock = new_posix_lock (&flock, old_lock->transport,
-                                      old_lock->client_pid, old_lock->owner,
+                                      old_lock->client_pid, &old_lock->owner,
                                       old_lock->fd);
         GF_VALIDATE_OR_GOTO (this->name, unlock_lock, out);
         ret = 0;
@@ -1011,19 +1010,19 @@ pl_setlk (xlator_t *this, pl_inode_t *pl_inode, posix_lock_t *lock,
 
                 if (__is_lock_grantable (pl_inode, lock)) {
                         gf_log (this->name, GF_LOG_TRACE,
-                                "%s (pid=%d) lk-owner:%"PRIu64" %"PRId64" - %"PRId64" => OK",
+                                "%s (pid=%d) lk-owner:%s %"PRId64" - %"PRId64" => OK",
                                 lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                                 lock->client_pid,
-                                lock->owner,
+                                lkowner_utoa (&lock->owner),
                                 lock->user_flock.l_start,
                                 lock->user_flock.l_len);
                         __insert_and_merge (pl_inode, lock);
                 } else if (can_block) {
                         gf_log (this->name, GF_LOG_TRACE,
-                                "%s (pid=%d) lk-owner:%"PRIu64" %"PRId64" - %"PRId64" => Blocked",
+                                "%s (pid=%d) lk-owner:%s %"PRId64" - %"PRId64" => Blocked",
                                 lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                                 lock->client_pid,
-                                lock->owner,
+                                lkowner_utoa (&lock->owner),
                                 lock->user_flock.l_start,
                                 lock->user_flock.l_len);
                         lock->blocked = 1;
@@ -1031,10 +1030,10 @@ pl_setlk (xlator_t *this, pl_inode_t *pl_inode, posix_lock_t *lock,
                         ret = -1;
                 } else {
                         gf_log (this->name, GF_LOG_TRACE,
-                                "%s (pid=%d) lk-owner:%"PRIu64" %"PRId64" - %"PRId64" => NOK",
+                                "%s (pid=%d) lk-owner:%s %"PRId64" - %"PRId64" => NOK",
                                 lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                                 lock->client_pid,
-                                lock->owner,
+                                lkowner_utoa (&lock->owner),
                                 lock->user_flock.l_start,
                                 lock->user_flock.l_len);
                         errno = EAGAIN;
diff --git a/xlators/features/locks/src/common.h b/xlators/features/locks/src/common.h
index d95e287cb94..0c0dd22e7ca 100644
--- a/xlators/features/locks/src/common.h
+++ b/xlators/features/locks/src/common.h
@@ -20,10 +20,12 @@
 #ifndef __COMMON_H__
 #define __COMMON_H__
 
+#include "lkowner.h"
+
 #define SET_FLOCK_PID(flock, lock) ((flock)->l_pid = lock->client_pid)
 posix_lock_t *
 new_posix_lock (struct gf_flock *flock, void *transport, pid_t client_pid,
-                uint64_t owner, fd_t *fd);
+                gf_lkowner_t *owner, fd_t *fd);
 
 pl_inode_t *
 pl_inode_get (xlator_t *this, inode_t *inode);
diff --git a/xlators/features/locks/src/entrylk.c b/xlators/features/locks/src/entrylk.c
index 886a30b0ef2..3e91b9d9467 100644
--- a/xlators/features/locks/src/entrylk.c
+++ b/xlators/features/locks/src/entrylk.c
@@ -35,7 +35,8 @@
 
 static pl_entry_lock_t *
 new_entrylk_lock (pl_inode_t *pinode, const char *basename, entrylk_type type,
-                  void *trans, pid_t client_pid, uint64_t owner, const char *volume)
+                  void *trans, pid_t client_pid, gf_lkowner_t *owner,
+                  const char *volume)
 
 {
         pl_entry_lock_t *newlock = NULL;
@@ -46,12 +47,12 @@ new_entrylk_lock (pl_inode_t *pinode, const char *basename, entrylk_type type,
                 goto out;
         }
 
-        newlock->basename       = basename ? gf_strdup (basename) : NULL;
-        newlock->type           = type;
-        newlock->trans          = trans;
-        newlock->volume         = volume;
-        newlock->client_pid     = client_pid;
-        newlock->owner          = owner;
+        newlock->basename   = basename ? gf_strdup (basename) : NULL;
+        newlock->type       = type;
+        newlock->trans      = trans;
+        newlock->volume     = volume;
+        newlock->client_pid = client_pid;
+        newlock->owner      = *owner;
 
         INIT_LIST_HEAD (&newlock->domain_list);
         INIT_LIST_HEAD (&newlock->blocked_locks);
@@ -81,11 +82,11 @@ names_conflict (const char *n1, const char *n2)
 }
 
 
-static int
+static inline int
 __same_entrylk_owner (pl_entry_lock_t *l1, pl_entry_lock_t *l2)
 {
 
-        return ((l1->owner == l2->owner) &&
+        return (is_same_lkowner (&l1->owner, &l2->owner) &&
                 (l1->trans  == l2->trans));
 }
 
@@ -320,15 +321,13 @@ __lock_name (pl_inode_t *pinode, const char *basename, entrylk_type type,
         pl_entry_lock_t *conf       = NULL;
         void            *trans      = NULL;
         pid_t            client_pid = 0;
-        uint64_t         owner      = 0;
-
-        int ret = -EINVAL;
+        int              ret        = -EINVAL;
 
         trans = frame->root->trans;
         client_pid = frame->root->pid;
-        owner      = frame->root->lk_owner;
 
-        lock = new_entrylk_lock (pinode, basename, type, trans, client_pid, owner, dom->domain);
+        lock = new_entrylk_lock (pinode, basename, type, trans, client_pid,
+                                 &frame->root->lk_owner, dom->domain);
         if (!lock) {
                 ret = -ENOMEM;
                 goto out;
@@ -601,7 +600,6 @@ pl_common_entrylk (call_frame_t *frame, xlator_t *this,
                    const char *volume, inode_t *inode, const char *basename,
                    entrylk_cmd cmd, entrylk_type type, loc_t *loc, fd_t *fd)
 {
-        uint64_t owner    = 0;
         int32_t  op_ret   = -1;
         int32_t  op_errno = 0;
 
@@ -628,10 +626,9 @@ pl_common_entrylk (call_frame_t *frame, xlator_t *this,
 
         entrylk_trace_in (this, frame, volume, fd, loc, basename, cmd, type);
 
-        owner     = frame->root->lk_owner;
         transport = frame->root->trans;
 
-        if (owner == 0) {
+        if (frame->root->lk_owner.len == 0) {
                 /*
                   this is a special case that means release
                   all locks from this transport
diff --git a/xlators/features/locks/src/inodelk.c b/xlators/features/locks/src/inodelk.c
index 1db08e05858..5785f1f8e3f 100644
--- a/xlators/features/locks/src/inodelk.c
+++ b/xlators/features/locks/src/inodelk.c
@@ -120,9 +120,10 @@ inodelk_overlap (pl_inode_lock_t *l1, pl_inode_lock_t *l2)
 }
 
 /* Returns true if the 2 inodelks have the same owner */
-static int same_inodelk_owner (pl_inode_lock_t *l1, pl_inode_lock_t *l2)
+static inline int
+same_inodelk_owner (pl_inode_lock_t *l1, pl_inode_lock_t *l2)
 {
-        return ((l1->owner == l2->owner) &&
+        return (is_same_lkowner (&l1->owner, &l2->owner) &&
                 (l1->transport  == l2->transport));
 }
 
@@ -212,10 +213,10 @@ __lock_inodelk (xlator_t *this, pl_inode_t *pl_inode, pl_inode_lock_t *lock,
                 list_add_tail (&lock->blocked_locks, &dom->blocked_inodelks);
 
                 gf_log (this->name, GF_LOG_TRACE,
-                        "%s (pid=%d) lk-owner:%"PRIu64" %"PRId64" - %"PRId64" => Blocked",
+                        "%s (pid=%d) lk-owner:%s %"PRId64" - %"PRId64" => Blocked",
                         lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                         lock->client_pid,
-                        lock->owner,
+                        lkowner_utoa (&lock->owner),
                         lock->user_flock.l_start,
                         lock->user_flock.l_len);
 
@@ -234,10 +235,10 @@ __lock_inodelk (xlator_t *this, pl_inode_t *pl_inode, pl_inode_lock_t *lock,
                 gf_log (this->name, GF_LOG_TRACE,
                         "Lock is grantable, but blocking to prevent starvation");
                 gf_log (this->name, GF_LOG_TRACE,
-                        "%s (pid=%d) (lk-owner=%"PRIu64") %"PRId64" - %"PRId64" => Blocked",
+                        "%s (pid=%d) (lk-owner=%s) %"PRId64" - %"PRId64" => Blocked",
                         lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                         lock->client_pid,
-                        lock->owner,
+                        lkowner_utoa (&lock->owner),
                         lock->user_flock.l_start,
                         lock->user_flock.l_len);
 
@@ -352,10 +353,10 @@ grant_blocked_inode_locks (xlator_t *this, pl_inode_t *pl_inode, pl_dom_list_t *
 
         list_for_each_entry_safe (lock, tmp, &granted, blocked_locks) {
                 gf_log (this->name, GF_LOG_TRACE,
-                        "%s (pid=%d) (lk-owner=%"PRIu64") %"PRId64" - %"PRId64" => Granted",
+                        "%s (pid=%d) (lk-owner=%s) %"PRId64" - %"PRId64" => Granted",
                         lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                         lock->client_pid,
-                        lock->owner,
+                        lkowner_utoa (&lock->owner),
                         lock->user_flock.l_start,
                         lock->user_flock.l_len);
 
@@ -405,8 +406,9 @@ release_inode_locks_of_transport (xlator_t *this, pl_dom_list_t *dom,
 
                         gf_log (this->name, GF_LOG_DEBUG,
                                 "releasing blocking lock on %s held by "
-                                "{transport=%p, pid=%"PRId64" lk-owner=%"PRIu64"}",
-                                file, trans, (uint64_t) l->client_pid, l->owner);
+                                "{transport=%p, pid=%"PRId64" lk-owner=%s}",
+                                file, trans, (uint64_t) l->client_pid,
+                                lkowner_utoa (&l->owner));
 
                         list_add (&l->blocked_locks, &released);
                         if (path) {
@@ -430,8 +432,9 @@ release_inode_locks_of_transport (xlator_t *this, pl_dom_list_t *dom,
 
                         gf_log (this->name, GF_LOG_DEBUG,
                                 "releasing granted lock on %s held by "
-                                "{transport=%p, pid=%"PRId64" lk-owner=%"PRIu64"}",
-                                file, trans, (uint64_t) l->client_pid, l->owner);
+                                "{transport=%p, pid=%"PRId64" lk-owner=%s}",
+                                file, trans, (uint64_t) l->client_pid,
+                                lkowner_utoa (&l->owner));
                         if (path) {
                                 GF_FREE (path);
                                 path = NULL;
@@ -468,19 +471,19 @@ pl_inode_setlk (xlator_t *this, pl_inode_t *pl_inode, pl_inode_lock_t *lock,
                         ret = __lock_inodelk (this, pl_inode, lock, can_block, dom);
                         if (ret == 0)
                                 gf_log (this->name, GF_LOG_TRACE,
-                                        "%s (pid=%d) (lk-owner=%"PRIu64") %"PRId64" - %"PRId64" => OK",
+                                        "%s (pid=%d) (lk-owner=%s) %"PRId64" - %"PRId64" => OK",
                                         lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                                         lock->client_pid,
-                                        lock->owner,
+                                        lkowner_utoa (&lock->owner),
                                         lock->fl_start,
                                         lock->fl_end);
 
                         if (ret == -EAGAIN)
                                 gf_log (this->name, GF_LOG_TRACE,
-                                        "%s (pid=%d) (lk-owner=%"PRIu64") %"PRId64" - %"PRId64" => NOK",
+                                        "%s (pid=%d) (lk-owner=%s) %"PRId64" - %"PRId64" => NOK",
                                         lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                                         lock->client_pid,
-                                        lock->owner,
+                                        lkowner_utoa (&lock->owner),
                                         lock->user_flock.l_start,
                                         lock->user_flock.l_len);
 
@@ -510,7 +513,7 @@ out:
 /* Create a new inode_lock_t */
 pl_inode_lock_t *
 new_inode_lock (struct gf_flock *flock, void *transport, pid_t client_pid,
-                uint64_t owner, const char *volume)
+                gf_lkowner_t *owner, const char *volume)
 
 {
         pl_inode_lock_t *lock = NULL;
@@ -531,8 +534,8 @@ new_inode_lock (struct gf_flock *flock, void *transport, pid_t client_pid,
 
         lock->transport  = transport;
         lock->client_pid = client_pid;
-        lock->owner      = owner;
         lock->volume     = volume;
+        lock->owner      = *owner;
 
         INIT_LIST_HEAD (&lock->list);
         INIT_LIST_HEAD (&lock->blocked_locks);
@@ -546,16 +549,15 @@ pl_common_inodelk (call_frame_t *frame, xlator_t *this,
                    const char *volume, inode_t *inode, int32_t cmd,
                    struct gf_flock *flock, loc_t *loc, fd_t *fd)
 {
-        int32_t op_ret   = -1;
-        int32_t op_errno = 0;
-        int     ret      = -1;
-        int     can_block = 0;
-        void *                  transport  = NULL;
-        pid_t                   client_pid = -1;
-        uint64_t                owner      = -1;
-        pl_inode_t *            pinode     = NULL;
-        pl_inode_lock_t *       reqlock    = NULL;
-        pl_dom_list_t *                dom           = NULL;
+        int32_t           op_ret     = -1;
+        int32_t           op_errno   = 0;
+        int               ret        = -1;
+        int               can_block  = 0;
+        pid_t             client_pid = -1;
+        void *            transport  = NULL;
+        pl_inode_t *      pinode     = NULL;
+        pl_inode_lock_t * reqlock    = NULL;
+        pl_dom_list_t *   dom        = NULL;
 
         VALIDATE_OR_GOTO (frame, out);
         VALIDATE_OR_GOTO (inode, unwind);
@@ -570,7 +572,6 @@ pl_common_inodelk (call_frame_t *frame, xlator_t *this,
 
         transport  = frame->root->trans;
         client_pid = frame->root->pid;
-        owner      = frame->root->lk_owner;
 
         pinode = pl_inode_get (this, inode);
         if (!pinode) {
@@ -580,7 +581,7 @@ pl_common_inodelk (call_frame_t *frame, xlator_t *this,
 
         dom = get_domain (pinode, volume);
 
-        if (owner == 0) {
+        if (frame->root->lk_owner.len == 0) {
                 /*
                   special case: this means release all locks
                   from this transport
@@ -594,7 +595,8 @@ pl_common_inodelk (call_frame_t *frame, xlator_t *this,
                 goto unwind;
         }
 
-        reqlock = new_inode_lock (flock, transport, client_pid, owner, volume);
+        reqlock = new_inode_lock (flock, transport, client_pid,
+                                  &frame->root->lk_owner, volume);
 
         if (!reqlock) {
                 op_ret = -1;
@@ -687,12 +689,12 @@ __get_inodelk_count (xlator_t *this, pl_inode_t *pl_inode)
 
                         gf_log (this->name, GF_LOG_DEBUG,
                                 " XATTR DEBUG"
-                                " domain: %s %s (pid=%d) (lk-owner=%"PRIu64") %"PRId64" - %"PRId64" "
+                                " domain: %s %s (pid=%d) (lk-owner=%s) %"PRId64" - %"PRId64" "
                                 "state = Active",
                                 dom->domain,
                                 lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                                 lock->client_pid,
-                                lock->owner,
+                                lkowner_utoa (&lock->owner),
                                 lock->user_flock.l_start,
                                 lock->user_flock.l_len);
 
@@ -703,12 +705,12 @@ __get_inodelk_count (xlator_t *this, pl_inode_t *pl_inode)
 
                         gf_log (this->name, GF_LOG_DEBUG,
                                 " XATTR DEBUG"
-                                " domain: %s %s (pid=%d) (lk-owner=%"PRIu64") %"PRId64" - %"PRId64" "
+                                " domain: %s %s (pid=%d) (lk-owner=%s) %"PRId64" - %"PRId64" "
                                 "state = Blocked",
                                 dom->domain,
                                 lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                                 lock->client_pid,
-                                lock->owner,
+                                lkowner_utoa (&lock->owner),
                                 lock->user_flock.l_start,
                                 lock->user_flock.l_len);
 
diff --git a/xlators/features/locks/src/locks.h b/xlators/features/locks/src/locks.h
index 476b9a83cd6..0dcbdf97901 100644
--- a/xlators/features/locks/src/locks.h
+++ b/xlators/features/locks/src/locks.h
@@ -30,6 +30,8 @@
 #include "call-stub.h"
 #include "locks-mem-types.h"
 
+#include "lkowner.h"
+
 #define POSIX_LOCKS "posix-locks"
 struct __pl_fd;
 
@@ -55,8 +57,8 @@ struct __posix_lock {
            across nodes */
 
         void              *transport;     /* to identify client node */
+        gf_lkowner_t       owner;
         pid_t              client_pid;    /* pid of client process */
-        uint64_t           owner;         /* lock owner from fuse */
 };
 typedef struct __posix_lock posix_lock_t;
 
@@ -83,8 +85,8 @@ struct __pl_inode_lock {
            across nodes */
 
         void              *transport;     /* to identify client node */
+        gf_lkowner_t       owner;
         pid_t              client_pid;    /* pid of client process */
-        uint64_t           owner;
 };
 typedef struct __pl_inode_lock pl_inode_lock_t;
 
@@ -120,9 +122,9 @@ struct __entry_lock {
         struct timeval     blkd_time;   /*time at which lock was queued into blkd list*/
         struct timeval     granted_time; /*time at which lock was queued into active list*/
 
-        void      *trans;
+        void             *trans;
+        gf_lkowner_t      owner;
         pid_t             client_pid;    /* pid of client process */
-        uint64_t          owner;
 };
 typedef struct __entry_lock pl_entry_lock_t;
 
diff --git a/xlators/features/locks/src/posix.c b/xlators/features/locks/src/posix.c
index 59e2199fb4b..0914d16df41 100644
--- a/xlators/features/locks/src/posix.c
+++ b/xlators/features/locks/src/posix.c
@@ -126,7 +126,7 @@ pl_truncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 static int
 truncate_allowed (pl_inode_t *pl_inode,
                   void *transport, pid_t client_pid,
-                  uint64_t owner, off_t offset)
+                  gf_lkowner_t *owner, off_t offset)
 {
         posix_lock_t *l = NULL;
         posix_lock_t  region = {.list = {0, }, };
@@ -136,7 +136,7 @@ truncate_allowed (pl_inode_t *pl_inode,
         region.fl_end     = LLONG_MAX;
         region.transport  = transport;
         region.client_pid = client_pid;
-        region.owner      = owner;
+        region.owner      = *owner;
 
         pthread_mutex_lock (&pl_inode->mutex);
         {
@@ -192,7 +192,7 @@ truncate_stat_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         if (priv->mandatory
             && pl_inode->mandatory
             && !truncate_allowed (pl_inode, frame->root->trans,
-                                  frame->root->pid, frame->root->lk_owner,
+                                  frame->root->pid, &frame->root->lk_owner,
                                   local->offset)) {
                 op_ret   = -1;
                 op_errno = EAGAIN;
@@ -324,7 +324,7 @@ delete_locks_of_fd (xlator_t *this, pl_inode_t *pl_inode, fd_t *fd)
 
 static void
 __delete_locks_of_owner (pl_inode_t *pl_inode,
-                         void *transport, uint64_t owner)
+                         void *transport, gf_lkowner_t *owner)
 {
         posix_lock_t *tmp = NULL;
         posix_lock_t *l = NULL;
@@ -332,14 +332,14 @@ __delete_locks_of_owner (pl_inode_t *pl_inode,
         /* TODO: what if it is a blocked lock with pending l->frame */
 
         list_for_each_entry_safe (l, tmp, &pl_inode->ext_list, list) {
-                if ((l->transport == transport)
-                    && (l->owner == owner)) {
+                if ((l->transport == transport) &&
+                    is_same_lkowner (&l->owner, owner)) {
                         gf_log ("posix-locks", GF_LOG_TRACE,
                                 " Flushing lock"
-                                "%s (pid=%d) (lk-owner=%"PRIu64") %"PRId64" - %"PRId64" state: %s",
+                                "%s (pid=%d) (lk-owner=%s) %"PRId64" - %"PRId64" state: %s",
                                 l->fl_type == F_UNLCK ? "Unlock" : "Lock",
                                 l->client_pid,
-                                l->owner,
+                                lkowner_utoa (&l->owner),
                                 l->user_flock.l_start,
                                 l->user_flock.l_len,
                                 l->blocked == 1 ? "Blocked" : "Active");
@@ -408,10 +408,7 @@ int
 pl_flush (call_frame_t *frame, xlator_t *this,
           fd_t *fd)
 {
-        pl_inode_t            *pl_inode = NULL;
-        uint64_t              owner     = -1;
-
-        owner = frame->root->lk_owner;
+        pl_inode_t *pl_inode = NULL;
 
         pl_inode = pl_inode_get (this, fd->inode);
 
@@ -423,7 +420,7 @@ pl_flush (call_frame_t *frame, xlator_t *this,
 
         pl_trace_flush (this, frame, fd);
 
-        if (owner == 0) {
+        if (frame->root->lk_owner.len == 0) {
                 /* Handle special case when protocol/server sets lk-owner to zero.
                  * This usually happens due to a client disconnection. Hence, free
                  * all locks opened with this fd.
@@ -437,7 +434,7 @@ pl_flush (call_frame_t *frame, xlator_t *this,
         pthread_mutex_lock (&pl_inode->mutex);
         {
                 __delete_locks_of_owner (pl_inode, frame->root->trans,
-                                         owner);
+                                         &frame->root->lk_owner);
         }
         pthread_mutex_unlock (&pl_inode->mutex);
 
@@ -805,7 +802,7 @@ lock_dup (posix_lock_t *lock)
         posix_lock_t *new_lock = NULL;
 
         new_lock = new_posix_lock (&lock->user_flock, lock->transport,
-                                   lock->client_pid, lock->owner,
+                                   lock->client_pid, &lock->owner,
                                    (fd_t *)lock->fd_num);
         return new_lock;
 }
@@ -964,20 +961,18 @@ int
 pl_lk (call_frame_t *frame, xlator_t *this,
        fd_t *fd, int32_t cmd, struct gf_flock *flock)
 {
-        void                  *transport = NULL;
-        pid_t                  client_pid = 0;
-        uint64_t               owner      = 0;
-        pl_inode_t            *pl_inode = NULL;
-        int                    op_ret = 0;
-        int                    op_errno = 0;
-        int                    can_block = 0;
-        posix_lock_t          *reqlock = NULL;
-        posix_lock_t          *conf = NULL;
-        int                    ret = 0;
+        void         *transport  = NULL;
+        pid_t         client_pid = 0;
+        pl_inode_t   *pl_inode   = NULL;
+        int           op_ret     = 0;
+        int           op_errno   = 0;
+        int           can_block  = 0;
+        posix_lock_t *reqlock    = NULL;
+        posix_lock_t *conf       = NULL;
+        int           ret        = 0;
 
         transport  = frame->root->trans;
         client_pid = frame->root->pid;
-        owner      = frame->root->lk_owner;
 
         if ((flock->l_start < 0) || (flock->l_len < 0)) {
                 op_ret = -1;
@@ -993,7 +988,7 @@ pl_lk (call_frame_t *frame, xlator_t *this,
         }
 
         reqlock = new_posix_lock (flock, transport, client_pid,
-                                  owner, fd);
+                                  &frame->root->lk_owner, fd);
 
         if (!reqlock) {
                 op_ret = -1;
@@ -1327,10 +1322,10 @@ __get_posixlk_count (xlator_t *this, pl_inode_t *pl_inode)
 
                         gf_log (this->name, GF_LOG_DEBUG,
                                 " XATTR DEBUG"
-                                "%s (pid=%d) (lk-owner=%"PRIu64") %"PRId64" - %"PRId64" state: %s",
+                                "%s (pid=%d) (lk-owner=%s) %"PRId64" - %"PRId64" state: %s",
                                 lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                                 lock->client_pid,
-                                lock->owner,
+                                lkowner_utoa (&lock->owner),
                                 lock->user_flock.l_start,
                                 lock->user_flock.l_len,
                                 lock->blocked == 1 ? "Blocked" : "Active");
@@ -1504,7 +1499,7 @@ out:
 
 void
 pl_dump_lock (char *str, int size, struct gf_flock *flock,
-              uint64_t owner, void *trans, time_t *granted_time,
+              gf_lkowner_t *owner, void *trans, time_t *granted_time,
               time_t *blkd_time, gf_boolean_t active)
 {
         char *type_str = NULL;
@@ -1526,30 +1521,32 @@ pl_dump_lock (char *str, int size, struct gf_flock *flock,
 
         if (active) {
                 if (blkd_time && *blkd_time == 0) {
-                        snprintf (str, size, "type=%s, start=%llu, len=%llu, pid=%llu, lk-owner=%llu, transport=%p, "
-                                  "granted at  %s",
+                        snprintf (str, size, "type=%s, start=%llu, len=%llu, "
+                                  "pid=%llu, lk-owner=%s, transport=%p, "
+                                  "granted at %s",
                                   type_str, (unsigned long long) flock->l_start,
                                   (unsigned long long) flock->l_len,
                                   (unsigned long long) flock->l_pid,
-                                  (unsigned long long) owner,
+                                  lkowner_utoa (owner),
                                   trans, ctime (granted_time));
                 } else {
-                        snprintf (str, size, "type=%s, start=%llu, len=%llu, pid=%llu, lk-owner=%llu, transport=%p, "
+                        snprintf (str, size, "type=%s, start=%llu, len=%llu, "
+                                  "pid=%llu, lk-owner=%s, transport=%p, "
                                   "blocked at %s, granted at  %s",
                                   type_str, (unsigned long long) flock->l_start,
                                   (unsigned long long) flock->l_len,
                                   (unsigned long long) flock->l_pid,
-                                  (unsigned long long) owner,
+                                  lkowner_utoa (owner),
                                   trans, ctime (blkd_time), ctime (granted_time));
                 }
         }
         else {
-                snprintf (str, size, "type=%s, start=%llu, len=%llu, pid=%llu, lk-owner=%llu, transport=%p, "
-                          "blocked at  %s",
+                snprintf (str, size, "type=%s, start=%llu, len=%llu, pid=%llu, "
+                          "lk-owner=%s, transport=%p, blocked at  %s",
                           type_str, (unsigned long long) flock->l_start,
                           (unsigned long long) flock->l_len,
                           (unsigned long long) flock->l_pid,
-                          (unsigned long long) owner,
+                          lkowner_utoa (owner),
                           trans, ctime (blkd_time));
         }
 
@@ -1580,20 +1577,20 @@ __dump_entrylks (pl_inode_t *pl_inode)
                                                "xlator.feature.locks.lock-dump.domain.entrylk",
                                                "entrylk[%d](ACTIVE)", count );
                         if (lock->blkd_time.tv_sec == 0 && lock->blkd_time.tv_usec == 0) {
-                                snprintf (tmp, 256," %s on %s pid = %llu, owner=%llu, transport=%p,"
+                                snprintf (tmp, 256," %s on %s pid = %llu, owner=%s, transport=%p,"
                                           " granted at %s",
                                           lock->type == ENTRYLK_RDLCK ? "ENTRYLK_RDLCK" :
                                           "ENTRYLK_WRLCK", lock->basename,
                                           (unsigned long long) lock->client_pid,
-                                          (unsigned long long) lock->owner, lock->trans,
+                                          lkowner_utoa (&lock->owner), lock->trans,
                                           ctime (&lock->granted_time.tv_sec));
                         } else {
-                                snprintf (tmp, 256," %s on %s pid = %llu, owner=%llu, transport=%p,"
+                                snprintf (tmp, 256," %s on %s pid = %llu, owner=%s, transport=%p,"
                                           " blocked at %s, granted at %s",
                                           lock->type == ENTRYLK_RDLCK ? "ENTRYLK_RDLCK" :
                                           "ENTRYLK_WRLCK", lock->basename,
                                           (unsigned long long) lock->client_pid,
-                                          (unsigned long long) lock->owner, lock->trans,
+                                          lkowner_utoa (&lock->owner), lock->trans,
                                           ctime (&lock->blkd_time.tv_sec),
                                           ctime (&lock->granted_time.tv_sec));
                         }
@@ -1608,12 +1605,12 @@ __dump_entrylks (pl_inode_t *pl_inode)
                         gf_proc_dump_build_key(key,
                                                "xlator.feature.locks.lock-dump.domain.entrylk",
                                                "entrylk[%d](BLOCKED)", count );
-                        snprintf (tmp, 256," %s on %s pid = %llu, owner=%llu, transport=%p,"
+                        snprintf (tmp, 256," %s on %s pid = %llu, owner=%s, transport=%p,"
                                   " blocked at %s",
                                   lock->type == ENTRYLK_RDLCK ? "ENTRYLK_RDLCK" :
                                   "ENTRYLK_WRLCK", lock->basename,
                                   (unsigned long long) lock->client_pid,
-                                  (unsigned long long) lock->owner, lock->trans,
+                                  lkowner_utoa (&lock->owner), lock->trans,
                                   ctime (&lock->blkd_time.tv_sec));
 
                         gf_proc_dump_write(key, tmp);
@@ -1663,7 +1660,8 @@ __dump_inodelks (pl_inode_t *pl_inode)
 
                         SET_FLOCK_PID (&lock->user_flock, lock);
                         pl_dump_lock (tmp, 256, &lock->user_flock,
-                                      lock->owner, lock->transport,
+                                      &lock->owner,
+                                      lock->transport,
                                       &lock->granted_time.tv_sec,
                                       &lock->blkd_time.tv_sec,
                                       _gf_true);
@@ -1679,7 +1677,8 @@ __dump_inodelks (pl_inode_t *pl_inode)
                                                "inodelk[%d](BLOCKED)",count );
                         SET_FLOCK_PID (&lock->user_flock, lock);
                         pl_dump_lock (tmp, 256, &lock->user_flock,
-                                      lock->owner, lock->transport,
+                                      &lock->owner,
+                                      lock->transport,
                                       0, &lock->blkd_time.tv_sec,
                                       _gf_false);
                         gf_proc_dump_write(key, tmp);
@@ -1720,7 +1719,7 @@ __dump_posixlks (pl_inode_t *pl_inode)
                                      count,
                                      lock->blocked ? "BLOCKED" : "ACTIVE");
               pl_dump_lock (tmp, 256, &lock->user_flock,
-                            lock->owner, lock->transport,
+                            &lock->owner, lock->transport,
                             &lock->granted_time.tv_sec, &lock->blkd_time.tv_sec,
                             (lock->blocked)? _gf_false: _gf_true);
               gf_proc_dump_write(key, tmp);
diff --git a/xlators/features/locks/src/reservelk.c b/xlators/features/locks/src/reservelk.c
index 4aac1803d8a..7a75cdea10d 100644
--- a/xlators/features/locks/src/reservelk.c
+++ b/xlators/features/locks/src/reservelk.c
@@ -81,10 +81,10 @@ out:
         return ret_lock;
 }
 
-static int
+static inline int
 __same_owner_reservelk (posix_lock_t *l1, posix_lock_t *l2)
 {
-        return ((l1->owner == l2->owner));
+        return (is_same_lkowner (&l1->owner, &l2->owner));
 
 }
 
@@ -187,10 +187,10 @@ __lock_reservelk (xlator_t *this, pl_inode_t *pl_inode, posix_lock_t *lock,
                 list_add_tail (&lock->list, &pl_inode->blocked_reservelks);
 
                 gf_log (this->name, GF_LOG_TRACE,
-                        "%s (pid=%d) lk-owner:%"PRIu64" %"PRId64" - %"PRId64" => Blocked",
+                        "%s (pid=%d) lk-owner:%s %"PRId64" - %"PRId64" => Blocked",
                         lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                         lock->client_pid,
-                        lock->owner,
+                        lkowner_utoa (&lock->owner),
                         lock->user_flock.l_start,
                         lock->user_flock.l_len);
 
@@ -292,10 +292,10 @@ grant_blocked_reserve_locks (xlator_t *this, pl_inode_t *pl_inode)
 
         list_for_each_entry_safe (lock, tmp, &granted, list) {
                 gf_log (this->name, GF_LOG_TRACE,
-                        "%s (pid=%d) (lk-owner=%"PRIu64") %"PRId64" - %"PRId64" => Granted",
+                        "%s (pid=%d) (lk-owner=%s) %"PRId64" - %"PRId64" => Granted",
                         lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                         lock->client_pid,
-                        lock->owner,
+                        lkowner_utoa (&lock->owner),
                         lock->user_flock.l_start,
                         lock->user_flock.l_len);
 
@@ -429,18 +429,18 @@ pl_reserve_setlk (xlator_t *this, pl_inode_t *pl_inode, posix_lock_t *lock,
                         ret = __lock_reservelk (this, pl_inode, lock, can_block);
                         if (ret < 0)
                                 gf_log (this->name, GF_LOG_TRACE,
-                                        "%s (pid=%d) (lk-owner=%"PRIu64") %"PRId64" - %"PRId64" => NOK",
+                                        "%s (pid=%d) (lk-owner=%s) %"PRId64" - %"PRId64" => NOK",
                                         lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                                         lock->client_pid,
-                                        lock->owner,
+                                        lkowner_utoa (&lock->owner),
                                         lock->user_flock.l_start,
                                         lock->user_flock.l_len);
                         else
                                 gf_log (this->name, GF_LOG_TRACE,
-                                        "%s (pid=%d) (lk-owner=%"PRIu64") %"PRId64" - %"PRId64" => OK",
+                                        "%s (pid=%d) (lk-owner=%s) %"PRId64" - %"PRId64" => OK",
                                         lock->fl_type == F_UNLCK ? "Unlock" : "Lock",
                                         lock->client_pid,
-                                        lock->owner,
+                                        lkowner_utoa (&lock->owner),
                                         lock->fl_start,
                                         lock->fl_end);
 
diff --git a/xlators/features/marker/src/marker-quota.c b/xlators/features/marker/src/marker-quota.c
index 57e8470d67a..227c4951b35 100644
--- a/xlators/features/marker/src/marker-quota.c
+++ b/xlators/features/marker/src/marker-quota.c
@@ -152,7 +152,7 @@ mq_assign_lk_owner (xlator_t *this, call_frame_t *frame)
         }
         UNLOCK (&conf->lock);
 
-        frame->root->lk_owner = lk_owner;
+        set_lk_owner_from_uint64 (&frame->root->lk_owner, lk_owner);
 
         return;
 }
diff --git a/xlators/mgmt/glusterd/src/glusterd-handshake.c b/xlators/mgmt/glusterd/src/glusterd-handshake.c
index e514f8bc45d..04e5fae7bd5 100644
--- a/xlators/mgmt/glusterd/src/glusterd-handshake.c
+++ b/xlators/mgmt/glusterd/src/glusterd-handshake.c
@@ -35,6 +35,7 @@
 #include "glusterfs3.h"
 #include "protocol-common.h"
 #include "rpcsvc.h"
+#include "rpc-common-xdr.h"
 
 extern struct rpc_clnt_program gd_peer_prog;
 extern struct rpc_clnt_program gd_mgmt_prog;
diff --git a/xlators/mount/fuse/src/fuse-bridge.c b/xlators/mount/fuse/src/fuse-bridge.c
index b8f53a1bc3c..7409488c1f9 100644
--- a/xlators/mount/fuse/src/fuse-bridge.c
+++ b/xlators/mount/fuse/src/fuse-bridge.c
@@ -3110,11 +3110,11 @@ fuse_setlk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                 } else if (op_errno == EAGAIN) {
                         gf_log ("glusterfs-fuse", GF_LOG_DEBUG,
                                 "Returning EAGAIN Flock: "
-                                "start=%llu, len=%llu, pid=%llu, lk-owner=%llu",
+                                "start=%llu, len=%llu, pid=%llu, lk-owner=%s",
                                 (unsigned long long) lock->l_start,
                                 (unsigned long long) lock->l_len,
                                 (unsigned long long) lock->l_pid,
-                                (unsigned long long) frame->root->lk_owner);
+                                lkowner_utoa (&frame->root->lk_owner));
 
                 } else  {
                         gf_log ("glusterfs-fuse", GF_LOG_WARNING,
diff --git a/xlators/mount/fuse/src/fuse-helpers.c b/xlators/mount/fuse/src/fuse-helpers.c
index 9bf85f979c3..2070447faa3 100644
--- a/xlators/mount/fuse/src/fuse-helpers.c
+++ b/xlators/mount/fuse/src/fuse-helpers.c
@@ -145,7 +145,7 @@ frame_fill_groups (call_frame_t *frame)
 {
 #if defined(GF_LINUX_HOST_OS)
         char         filename[32];
-        char         line[128];
+        char         line[4096];
         char        *ptr = NULL;
         FILE        *fp = NULL;
         int          idx = 0;
@@ -178,7 +178,7 @@ frame_fill_groups (call_frame_t *frame)
                         if (!endptr || *endptr)
                                 break;
                         frame->root->groups[idx++] = id;
-                        if (idx == GF_REQUEST_MAXGROUPS)
+                        if (idx == GF_MAX_AUX_GROUPS)
                                 break;
                 }
 
@@ -237,7 +237,6 @@ out:
 #endif /* GF_LINUX_HOST_OS */
 }
 
-
 call_frame_t *
 get_call_frame_for_req (fuse_state_t *state)
 {
@@ -260,8 +259,9 @@ get_call_frame_for_req (fuse_state_t *state)
                 frame->root->uid      = finh->uid;
                 frame->root->gid      = finh->gid;
                 frame->root->pid      = finh->pid;
-                frame->root->lk_owner = state->lk_owner;
                 frame->root->unique   = finh->unique;
+                set_lk_owner_from_uint64 (&frame->root->lk_owner,
+                                          state->lk_owner);
         }
 
         frame_fill_groups (frame);
diff --git a/xlators/nfs/server/src/nfs-fops.c b/xlators/nfs/server/src/nfs-fops.c
index 428c82a8fda..c6199d129eb 100644
--- a/xlators/nfs/server/src/nfs-fops.c
+++ b/xlators/nfs/server/src/nfs-fops.c
@@ -90,7 +90,7 @@ unsigned int            cval = 1;
 int
 nfs_frame_getctr ()
 {
-        int val = 0;
+        uint64_t val = 0;
 
         pthread_mutex_lock (&ctr);
         {
@@ -132,7 +132,8 @@ nfs_create_frame (xlator_t *xl, nfs_user_t *nfu)
                 gf_log (GF_NFS, GF_LOG_TRACE, "gid: %d", nfu->gids[x]);
                 frame->root->groups[y] = nfu->gids[x];
         }
-        frame->root->lk_owner = nfs_frame_getctr ();
+
+        set_lk_owner_from_uint64 (&frame->root->lk_owner, nfs_frame_getctr ());
 
 err:
         return frame;
diff --git a/xlators/nfs/server/src/nfs.h b/xlators/nfs/server/src/nfs.h
index a77e772a3e3..3113e32cc0b 100644
--- a/xlators/nfs/server/src/nfs.h
+++ b/xlators/nfs/server/src/nfs.h
@@ -45,6 +45,12 @@
 #define GF_NFS_DVM_ON                   1
 #define GF_NFS_DVM_OFF                  2
 
+/* This corresponds to the max 16 number of group IDs that are sent through an
+ * RPC request. Since NFS is the only one going to set this, we can be safe
+ * in keeping this size hardcoded.
+ */
+#define GF_REQUEST_MAXGROUPS    16
+
 /* Callback into a version-specific NFS protocol.
  * The return type is used by the nfs.c code to register the protocol.
  * with the RPC service.
diff --git a/xlators/protocol/client/src/client-handshake.c b/xlators/protocol/client/src/client-handshake.c
index 7bf95e912d0..85e10cb0b97 100644
--- a/xlators/protocol/client/src/client-handshake.c
+++ b/xlators/protocol/client/src/client-handshake.c
@@ -31,6 +31,7 @@
 
 #include "glusterfs3.h"
 #include "portmap-xdr.h"
+#include "rpc-common-xdr.h"
 
 extern rpc_clnt_prog_t clnt3_1_fop_prog;
 extern rpc_clnt_prog_t clnt_pmap_prog;
diff --git a/xlators/protocol/client/src/client-lk.c b/xlators/protocol/client/src/client-lk.c
index 5334500a96c..d08d2a413b7 100644
--- a/xlators/protocol/client/src/client-lk.c
+++ b/xlators/protocol/client/src/client-lk.c
@@ -20,6 +20,7 @@
 #include "common-utils.h"
 #include "xlator.h"
 #include "client.h"
+#include "lkowner.h"
 
 static void
 __insert_and_merge (clnt_fd_ctx_t *fdctx, client_posix_lock_t *lock);
@@ -36,11 +37,11 @@ __dump_client_lock (client_posix_lock_t *lock)
 
         gf_log (this->name, GF_LOG_INFO,
                 "{fd=%p}"
-                "{%s lk-owner:%"PRIu64" %"PRId64" - %"PRId64"}"
+                "{%s lk-owner:%s %"PRId64" - %"PRId64"}"
                 "{start=%"PRId64" end=%"PRId64"}",
                 lock->fd,
                 lock->fl_type == F_WRLCK ? "Write-Lock" : "Read-Lock",
-                lock->owner,
+                lkowner_utoa (&lock->owner),
                 lock->user_flock.l_start,
                 lock->user_flock.l_len,
                 lock->fl_start,
@@ -133,12 +134,6 @@ add_locks (client_posix_lock_t *l1, client_posix_lock_t *l2)
 	return sum;
 }
 
-/* Return true if the locks have the same owner */
-static int
-same_owner (client_posix_lock_t *l1, client_posix_lock_t *l2)
-{
-        return ((l1->owner == l2->owner));
-}
 
 /* Return true if the locks overlap, false otherwise */
 static int
@@ -285,11 +280,11 @@ __insert_and_merge (clnt_fd_ctx_t *fdctx, client_posix_lock_t *lock)
                 if (!locks_overlap (conf, lock))
                         continue;
 
-                if (same_owner (conf, lock)) {
+                if (is_same_lkowner (&conf->owner, &lock->owner)) {
                         if (conf->fl_type == lock->fl_type) {
                                 sum = add_locks (lock, conf);
 
-                                sum->fd         = lock->fd;
+                                sum->fd = lock->fd;
 
                                 __delete_client_lock (conf);
                                 __destroy_client_lock (conf);
@@ -301,8 +296,8 @@ __insert_and_merge (clnt_fd_ctx_t *fdctx, client_posix_lock_t *lock)
                         } else {
                                 sum = add_locks (lock, conf);
 
-                                sum->fd         = conf->fd;
-                                sum->owner      = conf->owner;
+                                sum->fd = conf->fd;
+                                sum->owner = conf->owner;
 
                                 v = subtract_locks (sum, lock);
 
@@ -365,7 +360,7 @@ destroy_client_lock (client_posix_lock_t *lock)
 }
 
 int32_t
-delete_granted_locks_owner (fd_t *fd, uint64_t owner)
+delete_granted_locks_owner (fd_t *fd, gf_lkowner_t *owner)
 {
         clnt_fd_ctx_t     *fdctx = NULL;
         client_posix_lock_t *lock  = NULL;
@@ -389,7 +384,7 @@ delete_granted_locks_owner (fd_t *fd, uint64_t owner)
         pthread_mutex_lock (&fdctx->mutex);
         {
                 list_for_each_entry_safe (lock, tmp, &fdctx->lock_list, list) {
-                        if (lock->owner == owner) {
+                        if (!is_same_lkowner (&lock->owner, owner)) {
                                 list_del_init (&lock->list);
                                 list_add_tail (&lock->list, &delete_list);
                                 count++;
@@ -486,7 +481,7 @@ client_cmd_to_gf_cmd (int32_t cmd, int32_t *gf_cmd)
 }
 
 static client_posix_lock_t *
-new_client_lock (struct gf_flock *flock, uint64_t owner,
+new_client_lock (struct gf_flock *flock, gf_lkowner_t *owner,
                  int32_t cmd, fd_t *fd)
 {
         client_posix_lock_t *new_lock = NULL;
@@ -509,7 +504,8 @@ new_client_lock (struct gf_flock *flock, uint64_t owner,
 	else
 		new_lock->fl_end = flock->l_start + flock->l_len - 1;
 
-        new_lock->owner = owner;
+        new_lock->owner = *owner;
+
         new_lock->cmd = cmd; /* Not really useful */
 
 out:
@@ -527,8 +523,8 @@ client_save_number_fds (clnt_conf_t *conf, int count)
 }
 
 int
-client_add_lock_for_recovery (fd_t *fd, struct gf_flock *flock, uint64_t owner,
-                              int32_t cmd)
+client_add_lock_for_recovery (fd_t *fd, struct gf_flock *flock,
+                              gf_lkowner_t *owner, int32_t cmd)
 {
         clnt_fd_ctx_t       *fdctx = NULL;
         xlator_t            *this  = NULL;
@@ -572,13 +568,13 @@ construct_reserve_unlock (struct gf_flock *lock, call_frame_t *frame,
 {
         GF_ASSERT (lock);
         GF_ASSERT (frame);
-        GF_ASSERT (frame->root->lk_owner);
 
         lock->l_type = F_UNLCK;
         lock->l_start = 0;
         lock->l_whence = SEEK_SET;
         lock->l_len = 0; /* Whole file */
         lock->l_pid = (uint64_t)(unsigned long)frame->root;
+        lock->l_owner = client_lock->owner;
 
         frame->root->lk_owner = client_lock->owner;
 
@@ -827,7 +823,6 @@ static int
 client_send_recovery_lock (call_frame_t *frame, xlator_t *this,
                            client_posix_lock_t *lock)
 {
-
         frame->root->lk_owner = lock->owner;
 
         /* Send all locks as F_SETLK to prevent the frame
diff --git a/xlators/protocol/client/src/client.h b/xlators/protocol/client/src/client.h
index 69830db9dc1..6d0b6491a10 100644
--- a/xlators/protocol/client/src/client.h
+++ b/xlators/protocol/client/src/client.h
@@ -111,8 +111,7 @@ typedef struct _client_posix_lock {
         off_t              fl_end;
         short              fl_type;
         int32_t            cmd;           /* the cmd for the lock call */
-        uint64_t           owner;         /* lock owner from fuse */
-
+        gf_lkowner_t       owner; /* lock owner from fuse */
         struct list_head   list;          /* reference used to add to the fdctx list of locks */
 } client_posix_lock_t;
 
@@ -126,7 +125,7 @@ typedef struct client_local {
         struct iobref       *iobref;
 
         client_posix_lock_t *client_lock;
-        uint64_t             owner;
+        gf_lkowner_t         owner;
         int32_t              cmd;
         struct list_head     lock_list;
         pthread_mutex_t      mutex;
@@ -190,9 +189,9 @@ int unserialize_rsp_direntp (struct gfs3_readdirp_rsp *rsp, gf_dirent_t *entries
 int clnt_readdir_rsp_cleanup (gfs3_readdir_rsp *rsp);
 int clnt_readdirp_rsp_cleanup (gfs3_readdirp_rsp *rsp);
 int client_attempt_lock_recovery (xlator_t *this, clnt_fd_ctx_t *fdctx);
-int32_t delete_granted_locks_owner (fd_t *fd, uint64_t owner);
-int client_add_lock_for_recovery (fd_t *fd, struct gf_flock *flock, uint64_t owner,
-                                  int32_t cmd);
+int32_t delete_granted_locks_owner (fd_t *fd, gf_lkowner_t *owner);
+int client_add_lock_for_recovery (fd_t *fd, struct gf_flock *flock,
+                                  gf_lkowner_t *owner, int32_t cmd);
 uint64_t decrement_reopen_fd_count (xlator_t *this, clnt_conf_t *conf);
 int32_t delete_granted_locks_fd (clnt_fd_ctx_t *fdctx);
 int32_t client_cmd_to_gf_cmd (int32_t cmd, int32_t *gf_cmd);
diff --git a/xlators/protocol/client/src/client3_1-fops.c b/xlators/protocol/client/src/client3_1-fops.c
index 6300b264fb1..036e297de38 100644
--- a/xlators/protocol/client/src/client3_1-fops.c
+++ b/xlators/protocol/client/src/client3_1-fops.c
@@ -725,10 +725,10 @@ client3_1_flush_cbk (struct rpc_req *req, struct iovec *iov, int count,
 
         if (rsp.op_ret >= 0) {
                 /* Delete all saved locks of the owner issuing flush */
-                ret = delete_granted_locks_owner (local->fd, local->owner);
+                ret = delete_granted_locks_owner (local->fd, &local->owner);
                 gf_log (this->name, GF_LOG_TRACE,
-                        "deleting locks of owner (%llu) returned %d",
-                        (long long unsigned) local->owner, ret);
+                        "deleting locks of owner (%s) returned %d",
+                        lkowner_utoa (&local->owner), ret);
         }
 
 out:
@@ -3655,7 +3655,7 @@ client3_1_flush (call_frame_t *frame, xlator_t *this,
         gfs3_flush_req  req      = {{0,},};
         int64_t         remote_fd = -1;
         clnt_conf_t    *conf     = NULL;
-        clnt_local_t *local    = NULL;
+        clnt_local_t   *local    = NULL;
         int             op_errno = ESTALE;
         int             ret      = 0;
 
diff --git a/xlators/protocol/server/src/server-helpers.c b/xlators/protocol/server/src/server-helpers.c
index f259a651fe1..43f60e0e2e4 100644
--- a/xlators/protocol/server/src/server-helpers.c
+++ b/xlators/protocol/server/src/server-helpers.c
@@ -39,7 +39,7 @@ server_decode_groups (call_frame_t *frame, rpcsvc_request_t *req)
         if (frame->root->ngrps == 0)
                 return 0;
 
-        if (frame->root->ngrps > GF_REQUEST_MAXGROUPS)
+        if (frame->root->ngrps > GF_MAX_AUX_GROUPS)
                 return -1;
 
         for (; i < frame->root->ngrps; ++i)
@@ -134,7 +134,7 @@ free_state (server_state_t *state)
 
 int
 gf_add_locker (struct _lock_table *table, const char *volume,
-               loc_t *loc, fd_t *fd, pid_t pid, uint64_t owner,
+               loc_t *loc, fd_t *fd, pid_t pid, gf_lkowner_t *owner,
                glusterfs_fop_t type)
 {
         int32_t         ret = -1;
@@ -158,7 +158,7 @@ gf_add_locker (struct _lock_table *table, const char *volume,
         }
 
         new->pid   = pid;
-        new->owner = owner;
+        new->owner = *owner;
 
         LOCK (&table->lock);
         {
@@ -175,7 +175,8 @@ out:
 
 int
 gf_del_locker (struct _lock_table *table, const char *volume,
-               loc_t *loc, fd_t *fd, uint64_t owner, glusterfs_fop_t type)
+               loc_t *loc, fd_t *fd, gf_lkowner_t *owner,
+               glusterfs_fop_t type)
 {
         struct _locker    *locker = NULL;
         struct _locker    *tmp = NULL;
@@ -197,17 +198,15 @@ gf_del_locker (struct _lock_table *table, const char *volume,
                 }
 
                 list_for_each_entry_safe (locker, tmp, head, lockers) {
-                        if (locker->fd && fd &&
-                            (locker->fd == fd) && (locker->owner == owner)
-                            && !strcmp (locker->volume, volume)) {
+                        if (!is_same_lkowner (&locker->owner, owner) ||
+                            strcmp (locker->volume, volume))
+                                continue;
+
+                        if (locker->fd && fd && (locker->fd == fd))
                                 list_move_tail (&locker->lockers, &del);
-                        } else if (locker->loc.inode &&
-                                   loc &&
-                                   (locker->loc.inode == loc->inode) &&
-                                   (locker->owner == owner)
-                                   && !strcmp (locker->volume, volume)) {
+                        else if (locker->loc.inode && loc &&
+                                 (locker->loc.inode == loc->inode))
                                 list_move_tail (&locker->lockers, &del);
-                        }
                 }
         }
         UNLOCK (&table->lock);
@@ -314,9 +313,9 @@ do_lock_table_cleanup (xlator_t *this, server_connection_t *conn,
                   lock owner = 0 is a special case that tells posix-locks
                   to release all locks from this transport
                 */
-                tmp_frame->root->pid      = 0;
-                tmp_frame->root->lk_owner = 0;
-                tmp_frame->root->trans    = conn;
+                tmp_frame->root->pid         = 0;
+                tmp_frame->root->trans       = conn;
+                memset (&tmp_frame->root->lk_owner, 0, sizeof (gf_lkowner_t));
 
                 if (locker->fd) {
                         GF_ASSERT (locker->fd->inode);
@@ -361,9 +360,9 @@ do_lock_table_cleanup (xlator_t *this, server_connection_t *conn,
         list_for_each_entry_safe (locker, tmp, &entrylk_lockers, lockers) {
                 tmp_frame = copy_frame (frame);
 
-                tmp_frame->root->lk_owner = 0;
-                tmp_frame->root->pid      = 0;
-                tmp_frame->root->trans    = conn;
+                tmp_frame->root->pid         = 0;
+                tmp_frame->root->trans       = conn;
+                memset (&tmp_frame->root->lk_owner, 0, sizeof (gf_lkowner_t));
 
                 if (locker->fd) {
                         GF_ASSERT (locker->fd->inode);
@@ -480,7 +479,9 @@ do_fd_cleanup (xlator_t *this, server_connection_t *conn, call_frame_t *frame,
 
                         tmp_frame->root->pid = 0;
                         tmp_frame->root->trans = conn;
-                        tmp_frame->root->lk_owner = 0;
+                        memset (&tmp_frame->root->lk_owner, 0,
+                                sizeof (gf_lkowner_t));
+
                         STACK_WIND (tmp_frame,
                                     server_connection_cleanup_flush_cbk,
                                     bound_xl, bound_xl->fops->flush, fd);
@@ -630,8 +631,9 @@ server_connection_destroy (xlator_t *this, server_connection_t *conn)
                           lock_owner = 0 is a special case that tells posix-locks
                           to release all locks from this transport
                         */
-                        tmp_frame->root->lk_owner = 0;
                         tmp_frame->root->trans = conn;
+                        memset (&tmp_frame->root->lk_owner, 0,
+                                sizeof (gf_lkowner_t));
 
                         if (locker->fd) {
                                 GF_ASSERT (locker->fd->inode);
@@ -676,8 +678,9 @@ server_connection_destroy (xlator_t *this, server_connection_t *conn)
                 list_for_each_entry_safe (locker, tmp, &entrylk_lockers, lockers) {
                         tmp_frame = copy_frame (frame);
 
-                        tmp_frame->root->lk_owner = 0;
                         tmp_frame->root->trans = conn;
+                        memset (&tmp_frame->root->lk_owner, 0,
+                                sizeof (gf_lkowner_t));
 
                         if (locker->fd) {
                                 GF_ASSERT (locker->fd->inode);
diff --git a/xlators/protocol/server/src/server-helpers.h b/xlators/protocol/server/src/server-helpers.h
index ac1222ed16b..844c98c27bf 100644
--- a/xlators/protocol/server/src/server-helpers.h
+++ b/xlators/protocol/server/src/server-helpers.h
@@ -52,14 +52,14 @@ gf_add_locker (struct _lock_table *table, const char *volume,
                loc_t *loc,
                fd_t *fd,
                pid_t pid,
-               uint64_t owner,
+               gf_lkowner_t *owner,
                glusterfs_fop_t type);
 
 int32_t
 gf_del_locker (struct _lock_table *table, const char *volume,
                loc_t *loc,
                fd_t *fd,
-               uint64_t owner,
+               gf_lkowner_t *owner,
                glusterfs_fop_t type);
 
 void
diff --git a/xlators/protocol/server/src/server.h b/xlators/protocol/server/src/server.h
index 6a37482f405..f261752171d 100644
--- a/xlators/protocol/server/src/server.h
+++ b/xlators/protocol/server/src/server.h
@@ -39,7 +39,7 @@ struct _locker {
         char             *volume;
         loc_t             loc;
         fd_t             *fd;
-        uint64_t          owner;
+        gf_lkowner_t      owner;
         pid_t             pid;
 };
 
diff --git a/xlators/protocol/server/src/server3_1-fops.c b/xlators/protocol/server/src/server3_1-fops.c
index b847d923c77..c2ab3590ed2 100644
--- a/xlators/protocol/server/src/server3_1-fops.c
+++ b/xlators/protocol/server/src/server3_1-fops.c
@@ -247,12 +247,13 @@ server_inodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         if (op_ret >= 0) {
                 if (state->flock.l_type == F_UNLCK)
                         gf_del_locker (conn->ltable, state->volume,
-                                       &state->loc, NULL, frame->root->lk_owner,
+                                       &state->loc, NULL, &frame->root->lk_owner,
                                        GF_FOP_INODELK);
                 else
                         gf_add_locker (conn->ltable, state->volume,
                                        &state->loc, NULL, frame->root->pid,
-                                       frame->root->lk_owner, GF_FOP_INODELK);
+                                       &frame->root->lk_owner,
+                                       GF_FOP_INODELK);
         } else if ((op_errno != ENOSYS) && (op_errno != EAGAIN)) {
                 gf_log (this->name, GF_LOG_INFO,
                         "%"PRId64": INODELK %s (%s) ==> %"PRId32" (%s)",
@@ -289,12 +290,12 @@ server_finodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                 if (state->flock.l_type == F_UNLCK)
                         gf_del_locker (conn->ltable, state->volume,
                                        NULL, state->fd,
-                                       frame->root->lk_owner, GF_FOP_INODELK);
+                                       &frame->root->lk_owner,  GF_FOP_INODELK);
                 else
                         gf_add_locker (conn->ltable, state->volume,
                                        NULL, state->fd,
                                        frame->root->pid,
-                                       frame->root->lk_owner, GF_FOP_INODELK);
+                                       &frame->root->lk_owner, GF_FOP_INODELK);
         } else if ((op_errno != ENOSYS) && (op_errno != EAGAIN)) {
                 gf_log (this->name, GF_LOG_INFO,
                         "%"PRId64": FINODELK %"PRId64" (%s) ==> %"PRId32" (%s)",
@@ -329,11 +330,13 @@ server_entrylk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         if (op_ret >= 0) {
                 if (state->cmd == ENTRYLK_UNLOCK)
                         gf_del_locker (conn->ltable, state->volume,
-                                       &state->loc, NULL, frame->root->lk_owner, GF_FOP_ENTRYLK);
+                                       &state->loc, NULL, &frame->root->lk_owner,
+                                       GF_FOP_ENTRYLK);
                 else
                         gf_add_locker (conn->ltable, state->volume,
                                        &state->loc, NULL, frame->root->pid,
-                                       frame->root->lk_owner, GF_FOP_ENTRYLK);
+                                       &frame->root->lk_owner,
+                                       GF_FOP_ENTRYLK);
         } else if ((op_errno != ENOSYS) && (op_errno != EAGAIN)) {
                 gf_log (this->name, GF_LOG_INFO,
                         "%"PRId64": ENTRYLK %s (%s) ==> %"PRId32" (%s)",
@@ -367,11 +370,12 @@ server_fentrylk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         if (op_ret >= 0) {
                 if (state->cmd == ENTRYLK_UNLOCK)
                         gf_del_locker (conn->ltable, state->volume,
-                                       NULL, state->fd, frame->root->lk_owner, GF_FOP_ENTRYLK);
+                                       NULL, state->fd, &frame->root->lk_owner,
+                                       GF_FOP_ENTRYLK);
                 else
                         gf_add_locker (conn->ltable, state->volume,
                                        NULL, state->fd, frame->root->pid,
-                                       frame->root->lk_owner, GF_FOP_ENTRYLK);
+                                       &frame->root->lk_owner, GF_FOP_ENTRYLK);
         } else if ((op_errno != ENOSYS) && (op_errno != EAGAIN)) {
                 gf_log (this->name, GF_LOG_INFO,
                         "%"PRId64": FENTRYLK %"PRId64" (%s) "