nfs,nfs3,mnt3: Transition fh resolution to gfid

Signed-off-by: Shehjar Tikoo <shehjart@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>

BUG: 971 (dynamic volume management)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=971

14 files changed, 847 insertions, 366 deletions

diff --git a/xlators/nfs/server/src/mount3.c b/xlators/nfs/server/src/mount3.c
index c61cf0a488a..3ea4bc8e893 100644
--- a/xlators/nfs/server/src/mount3.c
+++ b/xlators/nfs/server/src/mount3.c
@@ -211,6 +211,29 @@ free_err:
 }
 
 
+int
+__mnt3_get_volume_id (struct mount3_state *ms, xlator_t *mntxl,
+                      uuid_t volumeid)
+{
+        int                     ret = -1;
+        struct mnt3_export      *exp = NULL;
+
+        if ((!ms) || (!mntxl))
+                return ret;
+
+        list_for_each_entry (exp, &ms->exportlist, explist) {
+                if (exp->vol == mntxl) {
+                        uuid_copy (volumeid, exp->volumeid);
+                        ret = 0;
+                        goto out;
+                }
+        }
+
+out:
+        return ret;
+}
+
+
 int32_t
 mnt3svc_lookup_mount_cbk (call_frame_t *frame, void  *cookie,
                           xlator_t *this, int32_t op_ret, int32_t op_errno,
@@ -226,6 +249,8 @@ mnt3svc_lookup_mount_cbk (call_frame_t *frame, void  *cookie,
         int                     autharrlen = 0;
         rpcsvc_t                *svc = NULL;
         xlator_t                *mntxl = NULL;
+        uuid_t                  volumeid = {0, };
+        char                    fhstr[1024];
 
         req = (rpcsvc_request_t *)frame->local;
 
@@ -246,10 +271,19 @@ mnt3svc_lookup_mount_cbk (call_frame_t *frame, void  *cookie,
         if (status != MNT3_OK)
                 goto xmit_res;
 
-        fh = nfs3_fh_build_root_fh (ms->nfsx->children, mntxl);
         mnt3svc_update_mountlist (ms, req, mntxl->name);
+        if (gf_nfs_dvm_off (nfs_state (ms->nfsx))) {
+                fh = nfs3_fh_build_indexed_root_fh (ms->nfsx->children, mntxl);
+                goto xmit_res;
+        }
+
+        __mnt3_get_volume_id (ms, mntxl, volumeid);
+        fh = nfs3_fh_build_uuid_root_fh (volumeid);
+
 xmit_res:
-        gf_log (GF_MNT, GF_LOG_DEBUG, "Mount reply status: %d", status);
+        nfs3_fh_to_str (&fh, fhstr);
+        gf_log (GF_MNT, GF_LOG_DEBUG, "MNT reply: fh %s, status: %d", fhstr,
+                status);
         if (op_ret == 0) {
                 svc = nfs_rpcsvc_request_service (req);
                 autharrlen = nfs_rpcsvc_auth_array (svc, mntxl->name, autharr,
@@ -336,11 +370,13 @@ mnt3svc_volume_mount (rpcsvc_request_t *req, struct mount3_state *ms,
 {
         inode_t         *exportinode = NULL;
         int             ret = -EFAULT;
+        uuid_t          rootgfid = {0, };
 
         if ((!req) || (!exp) || (!ms))
                 return ret;
 
-        exportinode = inode_get (exp->vol->itable, 1, 0);
+        rootgfid[15] = 1;
+        exportinode = inode_find (exp->vol->itable, rootgfid);
         if (!exportinode) {
                 gf_log (GF_MNT, GF_LOG_ERROR, "Faild to get root inode");
                 ret = -ENOENT;
@@ -434,9 +470,8 @@ __mnt3_resolve_export_subdir_comp (mnt3_resolve_t *mres)
         char            dupsubdir[MNTPATHLEN];
         char            *nextcomp = NULL;
         int             ret = -EFAULT;
-        uint64_t        parino = 0;
-        uint64_t        pargen = 0;
         nfs_user_t      nfu = {0, };
+        char            gfidstr[512];
 
         if (!mres)
                 return ret;
@@ -445,17 +480,15 @@ __mnt3_resolve_export_subdir_comp (mnt3_resolve_t *mres)
         if (!nextcomp)
                 goto err;
 
-        parino = mres->resolveloc.inode->ino;
-
         /* Wipe the contents of the previous component */
         nfs_loc_wipe (&mres->resolveloc);
-        ret = nfs_entry_loc_fill (mres->exp->vol->itable, parino, pargen,
-                                  nextcomp, &mres->resolveloc,
-                                  NFS_RESOLVE_CREATE);
+        ret = nfs_entry_loc_fill (mres->exp->vol->itable,
+                                  mres->resolveloc.inode->gfid, nextcomp,
+                                  &mres->resolveloc, NFS_RESOLVE_CREATE);
         if ((ret < 0) && (ret != -2)) {
+                uuid_unparse (mres->resolveloc.inode->gfid, gfidstr);
                 gf_log (GF_MNT, GF_LOG_ERROR, "Failed to resolve and create "
-                        "inode: parent %"PRIu64", gen: %"PRIu64", entry %s",
-                        parino, pargen, nextcomp);
+                        "inode: parent gfid %s, entry %s", gfidstr, nextcomp);
                 ret = -EFAULT;
                 goto err;
         }
@@ -544,6 +577,7 @@ __mnt3_resolve_export_subdir (mnt3_resolve_t *mres)
         char            *firstcomp = NULL;
         int             ret = -EFAULT;
         nfs_user_t      nfu = {0, };
+        uuid_t          rootgfid = {0, };
 
         if (!mres)
                 return ret;
@@ -552,7 +586,8 @@ __mnt3_resolve_export_subdir (mnt3_resolve_t *mres)
         if (!firstcomp)
                 goto err;
 
-        ret = nfs_entry_loc_fill (mres->exp->vol->itable, 1, 0, firstcomp,
+        rootgfid[15] = 1;
+        ret = nfs_entry_loc_fill (mres->exp->vol->itable, rootgfid, firstcomp,
                                   &mres->resolveloc, NFS_RESOLVE_CREATE);
         if ((ret < 0) && (ret != -2)) {
                 gf_log (GF_MNT, GF_LOG_ERROR, "Failed to resolve and create "
@@ -577,6 +612,7 @@ mnt3_resolve_export_subdir (rpcsvc_request_t *req, struct mount3_state *ms,
         mnt3_resolve_t  *mres = NULL;
         char            *volume_subdir = NULL;
         int             ret = -EFAULT;
+        struct nfs3_fh  pfh = GF_NFS3FH_STATIC_INITIALIZER;
 
         if ((!req) || (!ms) || (!exp))
                 return ret;
@@ -595,9 +631,12 @@ mnt3_resolve_export_subdir (rpcsvc_request_t *req, struct mount3_state *ms,
         mres->mstate = ms;
         mres->req = req;
         strcpy (mres->remainingdir, volume_subdir);
-        mres->parentfh = nfs3_fh_build_root_fh (mres->mstate->nfsx->children,
-                                                mres->exp->vol);
+        if (gf_nfs_dvm_off (nfs_state (ms->nfsx)))
+                pfh = nfs3_fh_build_indexed_root_fh (mres->mstate->nfsx->children, mres->exp->vol);
+        else
+                pfh = nfs3_fh_build_uuid_root_fh (exp->volumeid);
 
+        mres->parentfh = pfh;
         ret = __mnt3_resolve_export_subdir (mres);
         if (ret < 0) {
                 gf_log (GF_MNT, GF_LOG_ERROR, "Failed to resolve export dir: %s"
@@ -1205,7 +1244,8 @@ err:
 
 
 struct mnt3_export *
-mnt3_init_export_ent (struct mount3_state *ms, xlator_t *xl, char *exportpath)
+mnt3_init_export_ent (struct mount3_state *ms, xlator_t *xl, char *exportpath,
+                      uuid_t volumeid)
 {
         struct mnt3_export      *exp = NULL;
         int                     alloclen = 0;
@@ -1247,6 +1287,11 @@ mnt3_init_export_ent (struct mount3_state *ms, xlator_t *xl, char *exportpath)
                 ret = snprintf (exp->expname, alloclen, "/%s", xl->name);
         }
 
+        /* Just copy without discrimination, we'll determine whether to
+         * actually use it when a mount request comes in and a file handle
+         * needs to be built.
+         */
+        uuid_copy (exp->volumeid, volumeid);
         exp->vol = xl;
 err:
         return exp;
@@ -1255,7 +1300,7 @@ err:
 
 int
 __mnt3_init_volume_direxports (struct mount3_state *ms, xlator_t *xlator,
-                               char *optstr)
+                               char *optstr, uuid_t volumeid)
 {
         struct mnt3_export      *newexp = NULL;
         int                     ret = -1;
@@ -1274,7 +1319,7 @@ __mnt3_init_volume_direxports (struct mount3_state *ms, xlator_t *xlator,
 
         token = strtok_r (dupopt, ",", &savptr);
         while (token) {
-                newexp = mnt3_init_export_ent (ms, xlator, token);
+                newexp = mnt3_init_export_ent (ms, xlator, token, volumeid);
                 if (!newexp) {
                         gf_log (GF_MNT, GF_LOG_ERROR, "Failed to init dir "
                                 "export: %s", token);
@@ -1302,10 +1347,48 @@ __mnt3_init_volume (struct mount3_state *ms, dict_t *opts, xlator_t *xlator)
         int                     ret = -1;
         char                    searchstr[1024];
         char                    *optstr  = NULL;
+        uuid_t                  volumeid = {0, };
 
         if ((!ms) || (!xlator) || (!opts))
                 return -1;
 
+        uuid_clear (volumeid);
+        if (gf_nfs_dvm_off (nfs_state (ms->nfsx)))
+                goto no_dvm;
+
+        ret = snprintf (searchstr, 1024, "nfs3.%s.volume-id", xlator->name);
+        if (ret < 0) {
+                gf_log (GF_MNT, GF_LOG_ERROR, "snprintf failed");
+                ret = -1;
+                goto err;
+        }
+
+        if (dict_get (opts, searchstr)) {
+                ret = dict_get_str (opts, searchstr, &optstr);
+                if (ret < 0) {
+                        gf_log (GF_MNT, GF_LOG_ERROR, "Failed to read option"
+                                ": %s", searchstr);
+                        ret = -1;
+                        goto err;
+                }
+        } else {
+                gf_log (GF_MNT, GF_LOG_ERROR, "DVM is on but volume-id not "
+                        "given for volume: %s", xlator->name);
+                ret = -1;
+                goto err;
+        }
+
+        if (optstr) {
+                ret = uuid_parse (optstr, volumeid);
+                if (ret < 0) {
+                        gf_log (GF_MNT, GF_LOG_ERROR, "Failed to parse volume "
+                                "UUID");
+                        ret = -1;
+                        goto err;
+                }
+        }
+
+no_dvm:
         ret = snprintf (searchstr, 1024, "nfs3.%s.export-dir", xlator->name);
         if (ret < 0) {
                 gf_log (GF_MNT, GF_LOG_ERROR, "snprintf failed");
@@ -1322,17 +1405,17 @@ __mnt3_init_volume (struct mount3_state *ms, dict_t *opts, xlator_t *xlator)
                         goto err;
                 }
 
-                ret = __mnt3_init_volume_direxports (ms, xlator, optstr);
+                ret = __mnt3_init_volume_direxports (ms, xlator, optstr,
+                                                     volumeid);
                 if (ret == -1) {
                         gf_log (GF_MNT, GF_LOG_ERROR, "Dir export setup failed"
                                 " for volume: %s", xlator->name);
                         goto err;
                 }
-
         }
 
         if (ms->export_volumes) {
-                newexp = mnt3_init_export_ent (ms, xlator, NULL);
+                newexp = mnt3_init_export_ent (ms, xlator, NULL, volumeid);
                 if (!newexp) {
                         ret = -1;
                         goto err;
diff --git a/xlators/nfs/server/src/mount3.h b/xlators/nfs/server/src/mount3.h
index f555bc7f18a..16b89f6da02 100644
--- a/xlators/nfs/server/src/mount3.h
+++ b/xlators/nfs/server/src/mount3.h
@@ -34,6 +34,7 @@
 #include "xdr-nfs3.h"
 #include "locking.h"
 #include "nfs3-fh.h"
+#include "uuid.h"
 
 /* Registered with portmap */
 #define GF_MOUNTV3_PORT         38465
@@ -73,6 +74,10 @@ struct mnt3_export {
         char                    *expname;
         xlator_t                *vol;
         int                     exptype;
+
+        /* Extracted from nfs volume options if nfs.dynamicvolumes is on.
+         */
+        uuid_t                  volumeid;
 };
 
 struct mount3_state {
diff --git a/xlators/nfs/server/src/nfs-common.c b/xlators/nfs/server/src/nfs-common.c
index 9f68f714649..970eb41c571 100644
--- a/xlators/nfs/server/src/nfs-common.c
+++ b/xlators/nfs/server/src/nfs-common.c
@@ -264,9 +264,8 @@ err:
         return ret;
 }
 
-
 int
-nfs_ino_loc_fill (inode_table_t *itable, uint64_t ino, uint64_t gen, loc_t *loc)
+nfs_gfid_loc_fill (inode_table_t *itable, uuid_t gfid, loc_t *loc)
 {
         int             ret = -EFAULT;
         inode_t         *inode = NULL;
@@ -274,7 +273,7 @@ nfs_ino_loc_fill (inode_table_t *itable, uint64_t ino, uint64_t gen, loc_t *loc)
         if (!loc)
                 return ret;
 
-        inode = inode_get (itable, ino, gen);
+        inode = inode_find (itable, gfid);
         if (!inode) {
                 ret = -ENOENT;
                 goto err;
@@ -290,6 +289,17 @@ err:
 
 
 int
+nfs_root_loc_fill (inode_table_t *itable, loc_t *loc)
+{
+        uuid_t  rootgfid = {0, };
+
+        rootgfid[15] = 1;
+        return nfs_gfid_loc_fill (itable, rootgfid, loc);
+}
+
+
+
+int
 nfs_parent_inode_loc_fill (inode_t *parent, inode_t *entryinode, char *entry,
                            loc_t *loc)
 {
@@ -317,7 +327,7 @@ err:
  * On other errors, return -3. 0 on success.
  */
 int
-nfs_entry_loc_fill (inode_table_t *itable, ino_t ino, uint64_t gen, char *entry,
+nfs_entry_loc_fill (inode_table_t *itable, uuid_t pargfid, char *entry,
                     loc_t *loc, int how)
 {
         inode_t         *parent = NULL;
@@ -329,7 +339,7 @@ nfs_entry_loc_fill (inode_table_t *itable, ino_t ino, uint64_t gen, char *entry,
         if ((!itable) || (!entry) || (!loc))
                 return ret;
 
-        parent = inode_get (itable, ino, gen);
+        parent = inode_find (itable, pargfid);
 
         ret = -1;
         /* Will need hard resolution now */
diff --git a/xlators/nfs/server/src/nfs-common.h b/xlators/nfs/server/src/nfs-common.h
index 20003aa7130..25fc1cf405b 100644
--- a/xlators/nfs/server/src/nfs-common.h
+++ b/xlators/nfs/server/src/nfs-common.h
@@ -30,6 +30,7 @@
 #include "xlator.h"
 #include "rpcsvc.h"
 #include "iatt.h"
+#include "uuid.h"
 
 #define NFS_PATH_MAX    PATH_MAX
 #define NFS_NAME_MAX    NAME_MAX
@@ -67,10 +68,12 @@ extern int
 nfs_inode_loc_fill (inode_t *inode, loc_t *loc);
 
 extern int
-nfs_ino_loc_fill (inode_table_t *itable, uint64_t ino, uint64_t gen, loc_t *l);
+nfs_ino_loc_fill (inode_table_t *itable, uuid_t gfid, loc_t *l);
 
 extern int
-nfs_entry_loc_fill (inode_table_t *itable, ino_t ino, uint64_t gen, char *entry,
+nfs_entry_loc_fill (inode_table_t *itable, uuid_t pargfid, char *entry,
                     loc_t *loc, int how);
 
+extern int
+nfs_root_loc_fill (inode_table_t *itable, loc_t *loc);
 #endif
diff --git a/xlators/nfs/server/src/nfs-fops.c b/xlators/nfs/server/src/nfs-fops.c
index 544f6c9e6b1..3f342710b25 100644
--- a/xlators/nfs/server/src/nfs-fops.c
+++ b/xlators/nfs/server/src/nfs-fops.c
@@ -71,6 +71,9 @@ nfs_fop_local_wipe (xlator_t *nfsx, struct nfs_fop_local *l)
         if (l->newparent)
                 inode_unref (l->newparent);
 
+        if (l->dictgfid)
+                dict_unref (l->dictgfid);
+
         mem_put (nfs->foppool, l);
 
         return;
@@ -222,6 +225,49 @@ err:
                 }                                                              \
         } while (0)                                                            \
 
+dict_t *
+nfs_gfid_dict ()
+{
+        uuid_t  newgfid = {0, };
+        char    *dyngfid = NULL;
+        dict_t  *dictgfid = NULL;
+        int     ret = -1;
+
+        dyngfid = GF_CALLOC (1, sizeof (uuid_t), gf_common_mt_char);
+        uuid_generate (newgfid);
+        memcpy (dyngfid, newgfid, sizeof (uuid_t));
+
+        dictgfid = dict_new ();
+        if (!dictgfid) {
+                gf_log (GF_NFS, GF_LOG_ERROR, "Failed to create gfid dict");
+                goto out;
+        }
+
+        ret = dict_set_bin (dictgfid, "gfid-req", dyngfid, sizeof (uuid_t));
+        if (ret < 0) {
+                dict_unref (dictgfid);
+                dictgfid = NULL;
+        }
+
+out:
+        return dictgfid;
+}
+
+#define nfs_fop_gfid_setup(nflcl, retval, erlbl)                        \
+        do {                                                            \
+                if (nflcl) {                                            \
+                        (nflcl)->dictgfid = nfs_gfid_dict ();           \
+                                                                        \
+                        if (!((nflcl)->dictgfid)) {                     \
+                                retval = -EFAULT;                       \
+                                goto erlbl;                             \
+                        }                                               \
+                }                                                       \
+        } while (0)                                                     \
+
+
+
+
 /* Fops Layer Explained
  * The fops layer has three types of functions. They can all be identified by
  * their names. Here are the three patterns:
@@ -281,9 +327,10 @@ nfs_fop_lookup (xlator_t *nfsx, xlator_t *xl, nfs_user_t *nfu, loc_t *loc,
         nfs_fop_handle_frame_create (frame, nfsx, nfu, ret, err);
         nfs_fop_handle_local_init (frame, nfsx, nfl, cbk, local, ret, err);
         nfs_fop_save_root_ino (nfl, loc);
+        nfs_fop_gfid_setup (nfl, ret, err);
 
         STACK_WIND_COOKIE (frame, nfs_fop_lookup_cbk, xl, xl,
-                           xl->fops->lookup, loc, NULL);
+                           xl->fops->lookup, loc, nfl->dictgfid);
 
         ret = 0;
 err:
@@ -603,9 +650,10 @@ nfs_fop_create (xlator_t *nfsx, xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc,
         nfs_fop_handle_frame_create (frame, nfsx, nfu, ret, err);
         nfs_fop_handle_local_init (frame, nfsx, nfl, cbk, local, ret, err);
         nfs_fop_save_root_ino (nfl, pathloc);
+        nfs_fop_gfid_setup (nfl, ret, err);
 
         STACK_WIND_COOKIE (frame, nfs_fop_create_cbk, xl, xl, xl->fops->create,
-                           pathloc, flags, mode, fd, NULL);
+                           pathloc, flags, mode, fd, nfl->dictgfid);
 
         ret = 0;
 err:
@@ -700,9 +748,10 @@ nfs_fop_mkdir (xlator_t *nfsx, xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc,
         nfs_fop_handle_frame_create (frame, nfsx, nfu, ret, err);
         nfs_fop_handle_local_init (frame, nfsx, nfl, cbk, local, ret, err);
         nfs_fop_save_root_ino (nfl, pathloc);
+        nfs_fop_gfid_setup (nfl, ret, err);
 
         STACK_WIND_COOKIE  (frame, nfs_fop_mkdir_cbk, xl, xl, xl->fops->mkdir,
-                            pathloc, mode, NULL);
+                            pathloc, mode, nfl->dictgfid);
         ret = 0;
 err:
         if (ret < 0) {
@@ -747,9 +796,10 @@ nfs_fop_symlink (xlator_t *nfsx, xlator_t *xl, nfs_user_t *nfu, char *target,
         nfs_fop_handle_frame_create (frame, nfsx, nfu, ret, err);
         nfs_fop_handle_local_init (frame, nfsx, nfl, cbk, local, ret, err);
         nfs_fop_save_root_ino (nfl, pathloc);
+        nfs_fop_gfid_setup (nfl, ret, err);
 
         STACK_WIND_COOKIE  (frame, nfs_fop_symlink_cbk, xl, xl,
-                            xl->fops->symlink, target, pathloc, NULL);
+                            xl->fops->symlink, target, pathloc, nfl->dictgfid);
         ret = 0;
 err:
         if (ret < 0) {
@@ -841,9 +891,10 @@ nfs_fop_mknod (xlator_t *nfsx, xlator_t *xl, nfs_user_t *nfu, loc_t *pathloc,
         nfs_fop_handle_frame_create (frame, nfsx, nfu, ret, err);
         nfs_fop_handle_local_init (frame, nfsx, nfl, cbk, local, ret, err);
         nfs_fop_save_root_ino (nfl, pathloc);
+        nfs_fop_gfid_setup (nfl, ret, err);
 
         STACK_WIND_COOKIE  (frame, nfs_fop_mknod_cbk, xl, xl, xl->fops->mknod,
-                            pathloc, mode, dev, NULL);
+                            pathloc, mode, dev, nfl->dictgfid);
         ret = 0;
 err:
         if (ret < 0) {
diff --git a/xlators/nfs/server/src/nfs-fops.h b/xlators/nfs/server/src/nfs-fops.h
index be445a641eb..3fb157aebf3 100644
--- a/xlators/nfs/server/src/nfs-fops.h
+++ b/xlators/nfs/server/src/nfs-fops.h
@@ -99,6 +99,7 @@ struct nfs_fop_local {
         char            path[NFS_NAME_MAX];
         char            newpath[NFS_NAME_MAX];
         xlator_t        *nfsx;
+        dict_t          *dictgfid;
 };
 
 extern struct nfs_fop_local *
diff --git a/xlators/nfs/server/src/nfs.c b/xlators/nfs/server/src/nfs.c
index 8f3c8b2f520..431765332ca 100644
--- a/xlators/nfs/server/src/nfs.c
+++ b/xlators/nfs/server/src/nfs.c
@@ -457,29 +457,33 @@ mem_acct_init (xlator_t *this)
         return ret;
 }
 
-int
-init (xlator_t *this) {
 
+struct nfs_state *
+nfs_init_state (xlator_t *this)
+{
         struct nfs_state        *nfs = NULL;
         int                     ret = -1;
         unsigned int            fopspoolsize = 0;
+        char                    *optstr = NULL;
+        gf_boolean_t            boolt = _gf_false;
 
         if (!this)
-                return -1;
+                return NULL;
 
         if ((!this->children) || (!this->children->xlator)) {
                 gf_log (GF_NFS, GF_LOG_ERROR, "nfs must have at least one"
                         " child subvolume");
-                return -1;
+                return NULL;
         }
 
         nfs = GF_CALLOC (1, sizeof (*nfs), gf_nfs_mt_nfs_state);
         if (!nfs) {
                 gf_log (GF_NFS, GF_LOG_ERROR, "memory allocation failed");
-                return -1;
+                return NULL;
         }
 
-        /* RPC service needs to be started before NFS versions can be inited. */
+        /* RPC service needs to be started before NFS versions can be
+         * inited. */
         nfs->rpcsvc =  nfs_rpcsvc_init (this->ctx, this->options);
         if (!nfs->rpcsvc) {
                 gf_log (GF_NFS, GF_LOG_ERROR, "RPC service init failed");
@@ -491,33 +495,86 @@ init (xlator_t *this) {
         /* FIXME: Really saddens me to see this as xlator wide. */
         nfs->foppool = mem_pool_new (struct nfs_fop_local, fopspoolsize);
         if (!nfs->foppool) {
-                gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to allocate fops local"
-                        " pool");
+                gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to allocate fops "
+                        "local pool");
                 goto free_rpcsvc;
         }
 
+        nfs->dynamicvolumes = GF_NFS_DVM_OFF;
+        if (dict_get (this->options, "nfs.dynamic-volumes")) {
+                ret = dict_get_str (this->options, "nfs.dynamic-volumes",
+                                    &optstr);
+                if (ret < 0) {
+                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse dict");
+                        goto free_foppool;
+                }
+
+                ret = gf_string2boolean (optstr, &boolt);
+                if (ret < 0) {
+                        gf_log (GF_NFS, GF_LOG_ERROR, "Failed to parse bool "
+                                "string");
+                        goto free_foppool;
+                }
+
+                if (boolt == _gf_true)
+                        nfs->dynamicvolumes = GF_NFS_DVM_ON;
+        }
+
         this->private = (void *)nfs;
         INIT_LIST_HEAD (&nfs->versions);
+
+        ret = 0;
+
+free_foppool:
+        if (ret < 0)
+                mem_pool_destroy (nfs->foppool);
+
+free_rpcsvc:
+        /*
+         * rpcsvc_deinit */
+free_nfs:
+        if (ret < 0) {
+                GF_FREE (nfs);
+                nfs = NULL;
+        }
+
+        return nfs;
+}
+
+
+int
+init (xlator_t *this) {
+
+        struct nfs_state        *nfs = NULL;
+        int                     ret = -1;
+
+        if (!this)
+                return -1;
+
+        nfs = nfs_init_state (this);
+        if (!nfs) {
+                gf_log (GF_NFS, GF_LOG_ERROR, "Failed to init nfs option");
+                return -1;
+        }
+
         ret = nfs_add_all_initiators (nfs);
         if (ret == -1) {
                 gf_log (GF_NFS, GF_LOG_ERROR, "Failed to add initiators");
-                goto free_nfs;
+                goto err;
         }
 
         ret = nfs_init_subvolumes (nfs, this->children);
         if (ret == -1) {
-                gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to init NFS exports");
-                goto free_rpcsvc;
+                gf_log (GF_NFS, GF_LOG_CRITICAL, "Failed to init NFS "
+                        "exports");
+                goto err;
         }
 
-free_rpcsvc:
-        /*
-         * rpcsvc_deinit */
-free_nfs:
-        if (ret == -1)
-                GF_FREE (nfs);
+        ret = 0;
+err:
+        if (ret == 0)
+                gf_log (GF_NFS, GF_LOG_INFO, "NFS service started");
 
-        gf_log (GF_NFS, GF_LOG_DEBUG, "NFS service started");
         return ret;
 }
 
@@ -731,6 +788,20 @@ struct volume_options options[] = {
                   " using hostnames in rpc-auth.addr.* filters. By default, "
                   " name lookup is on."
         },
+        { .key  = {"nfs.dynamic-volumes"},
+          .type = GF_OPTION_TYPE_BOOL,
+          .description = "Internal option set to tell gnfs to use a different"
+                         " scheme for encoding file handles when DVM is being"
+                         " used."
+        },
+        { .key  = {"nfs3.%s.volume-id"},
+          .type = GF_OPTION_TYPE_STR,
+          .description = "When nfs.dynamic-volumes is set, gnfs expects every "
+                         "subvolume to have this option set for it, so that "
+                         "gnfs can use this option to identify the volume. "
+                         "If all subvolumes do not have this option set, an "
+                         "error is reported."
+        },
 	{ .key  = {NULL} },
 };
 
diff --git a/xlators/nfs/server/src/nfs.h b/xlators/nfs/server/src/nfs.h
index b4973834558..baee0ce0f6a 100644
--- a/xlators/nfs/server/src/nfs.h
+++ b/xlators/nfs/server/src/nfs.h
@@ -42,6 +42,9 @@
 #define GF_NFS_MIN_MEMFACTOR            1
 #define GF_NFS_MAX_MEMFACTOR            30
 
+#define GF_NFS_DVM_ON                   1
+#define GF_NFS_DVM_OFF                  2
+
 /* 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.
@@ -68,8 +71,11 @@ struct nfs_state {
         int                     upsubvols;
         xlator_t                **initedxl;
         int                     subvols_started;
+        int                     dynamicvolumes;
 };
 
+#define gf_nfs_dvm_on(nfsstt)   (((struct nfs_state *)nfsstt)->dynamicvolumes == GF_NFS_DVM_ON)
+#define gf_nfs_dvm_off(nfsstt)  (((struct nfs_state *)nfsstt)->dynamicvolumes == GF_NFS_DVM_OFF)
 
 /* We have one gid more than the glusterfs maximum since we pass the primary
  * gid as the first element of the array.
diff --git a/xlators/nfs/server/src/nfs3-fh.c b/xlators/nfs/server/src/nfs3-fh.c
index 7a7a06da058..10c00ba3287 100644
--- a/xlators/nfs/server/src/nfs3-fh.c
+++ b/xlators/nfs/server/src/nfs3-fh.c
@@ -49,15 +49,6 @@ nfs3_fh_validate (struct nfs3_fh *fh)
 }
 
 
-xlator_t *
-nfs3_fh_to_xlator (xlator_list_t *cl, struct nfs3_fh *fh)
-{
-	if ((!cl) || (!fh))
-		return NULL;
-
-	return nfs_xlid_to_xlator (cl, fh->xlatorid);
-}
-
 void
 nfs3_fh_init (struct nfs3_fh *fh, struct iatt *buf)
 {
@@ -68,24 +59,35 @@ nfs3_fh_init (struct nfs3_fh *fh, struct iatt *buf)
         fh->ident[1] = GF_NFSFH_IDENT1;
 
         fh->hashcount = 0;
-        fh->gen = buf->ia_gen;
-        fh->ino = buf->ia_ino;
-
+        uuid_copy (fh->gfid, buf->ia_gfid);
 }
 
 
 struct nfs3_fh
-nfs3_fh_build_root_fh (xlator_list_t *cl, xlator_t *xl)
+nfs3_fh_build_indexed_root_fh (xlator_list_t *cl, xlator_t *xl)
 {
         struct nfs3_fh  fh = {{0}, };
         struct iatt     buf = {0, };
         if ((!cl) || (!xl))
                 return fh;
 
+        buf.ia_gfid[15] = 1;
         nfs3_fh_init (&fh, &buf);
-        fh.xlatorid = nfs_xlator_to_xlid (cl, xl);
-        fh.ino = 1;
-        fh.gen = 0;
+        fh.exportid [15] = nfs_xlator_to_xlid (cl, xl);
+
+        return fh;
+}
+
+
+struct nfs3_fh
+nfs3_fh_build_uuid_root_fh (uuid_t volumeid)
+{
+        struct nfs3_fh  fh = {{0}, };
+        struct iatt     buf = {0, };
+
+        nfs3_fh_init (&fh, &buf);
+        uuid_copy (fh.exportid, volumeid);
+
         return fh;
 }
 
@@ -93,10 +95,13 @@ nfs3_fh_build_root_fh (xlator_list_t *cl, xlator_t *xl)
 int
 nfs3_fh_is_root_fh (struct nfs3_fh *fh)
 {
+        uuid_t  rootgfid = {0, 1};
+
         if (!fh)
                 return 0;
 
-        if (fh->hashcount == 0)
+        rootgfid[15] = 1;
+        if (uuid_compare (fh->gfid, rootgfid) == 0)
                 return 1;
 
         return 0;
@@ -104,10 +109,12 @@ nfs3_fh_is_root_fh (struct nfs3_fh *fh)
 
 
 nfs3_hash_entry_t
-nfs3_fh_hash_entry (ino_t ino, uint64_t gen)
+nfs3_fh_hash_entry (uuid_t gfid)
 {
         nfs3_hash_entry_t       hash = 0;
         int                     shiftsize = 48;
+        uint64_t                ino = 0;
+        uint64_t                gen = 0;
         nfs3_hash_entry_t       inomsb = 0;
         nfs3_hash_entry_t       inolsb = 0;
         nfs3_hash_entry_t       inols23b = 0;
@@ -116,6 +123,7 @@ nfs3_fh_hash_entry (ino_t ino, uint64_t gen)
         nfs3_hash_entry_t       genlsb = 0;
         nfs3_hash_entry_t       genls23b = 0;
 
+        memcpy (&ino, &gfid[8], 8);
         hash = ino;
         while (shiftsize != 0) {
                 hash ^= (ino >> shiftsize);
@@ -139,6 +147,7 @@ nfs3_fh_hash_entry (ino_t ino, uint64_t gen)
         inols23b = (inols23b << 8);
 //        gf_log ("FILEHDNALE", GF_LOG_TRACE, "inols23b  %d", inols23b);
 
+        memcpy (&gen, &gfid[0], 8);
         genmsb = (gen >> 56);
 //        gf_log ("FILEHANDLE", GF_LOG_TRACE, "inomsb %d", inomsb);
 
@@ -163,11 +172,16 @@ nfs3_fh_hash_entry (ino_t ino, uint64_t gen)
 void
 nfs3_fh_to_str (struct nfs3_fh *fh, char *str)
 {
+        char            gfid[512];
+        char            exportid[512];
+
         if ((!fh) || (!str))
                 return;
 
-        sprintf (str, "FH: hashcount %d, xlid %d, gen %"PRIu64", ino %"PRIu64,
-                 fh->hashcount, fh->xlatorid, fh->gen, fh->ino);
+        uuid_unparse (fh->gfid, gfid);
+        uuid_unparse (fh->exportid, exportid);
+        sprintf (str, "FH: hashcount %d, exportid %s, gfid %s",
+                 fh->hashcount, exportid, gfid);
 }
 
 
@@ -175,12 +189,16 @@ void
 nfs3_log_fh (struct nfs3_fh *fh)
 {
 //        int     x = 0;
+        char    gfidstr[512];
+        char    exportidstr[512];
+
         if (!fh)
                 return;
 
-        gf_log ("nfs3-fh", GF_LOG_TRACE, "filehandle: hashcount %d, xlid %d, "
-                "gen %"PRIu64", ino %"PRIu64, fh->hashcount, fh->xlatorid,
-                fh->gen, fh->ino);
+        uuid_unparse (fh->gfid, gfidstr);
+        uuid_unparse (fh->exportid, exportidstr);
+        gf_log ("nfs3-fh", GF_LOG_TRACE, "filehandle: hashcount %d, exportid %d"
+                ", gfid 0x%s", fh->hashcount, exportidstr, gfidstr);
 /*
         for (; x < fh->hashcount; ++x)
                 gf_log ("FILEHANDLE", GF_LOG_TRACE, "Hash %d: %d", x,
@@ -197,12 +215,9 @@ nfs3_fh_build_parent_fh (struct nfs3_fh *child, struct iatt *newstat,
                 return -1;
 
         nfs3_fh_init (newfh, newstat);
-        newfh->xlatorid = child->xlatorid;
-        if ((newstat->ia_ino == 1) && (newstat->ia_gen == 0)) {
-                newfh->ino = 1;
-                newfh->gen = 0;
+        uuid_copy (newfh->exportid, child->exportid);
+        if (newstat->ia_ino == 1)
                 goto done;
-        }
 
         newfh->hashcount = child->hashcount - 1;
         memcpy (newfh->entryhash, child->entryhash,
@@ -215,7 +230,6 @@ done:
 }
 
 
-
 int
 nfs3_fh_build_child_fh (struct nfs3_fh *parent, struct iatt *newstat,
                         struct nfs3_fh *newfh)
@@ -227,12 +241,7 @@ nfs3_fh_build_child_fh (struct nfs3_fh *parent, struct iatt *newstat,
                 return -1;
 
         nfs3_fh_init (newfh, newstat);
-        newfh->xlatorid = parent->xlatorid;
-        if ((newstat->ia_ino == 1) && (newstat->ia_gen == 0)) {
-                newfh->ino = 1;
-                newfh->gen = 0;
-                goto done;
-        }
+        uuid_copy (newfh->exportid, parent->exportid);
 
         newfh->hashcount = parent->hashcount + 1;
         /* Only copy the hashes that are available in the parent file
@@ -249,11 +258,9 @@ nfs3_fh_build_child_fh (struct nfs3_fh *parent, struct iatt *newstat,
          * array of the child entry. */
         if (newfh->hashcount <= GF_NFSFH_MAXHASHES) {
                 entry = newfh->hashcount - 1;
-                newfh->entryhash[entry] = nfs3_fh_hash_entry (parent->ino,
-                                                              parent->gen);
+                newfh->entryhash[entry] = nfs3_fh_hash_entry (parent->gfid);
         }
 
-done:
 //        nfs3_log_fh (newfh);
 
         return 0;
diff --git a/xlators/nfs/server/src/nfs3-fh.h b/xlators/nfs/server/src/nfs3-fh.h
index 4ee4423951c..987063e7407 100644
--- a/xlators/nfs/server/src/nfs3-fh.h
+++ b/xlators/nfs/server/src/nfs3-fh.h
@@ -29,13 +29,14 @@
 #include "xdr-nfs3.h"
 #include "iatt.h"
 #include <sys/types.h>
+#include "uuid.h"
 
 /* BIG FAT WARNING: The file handle code is tightly coupled to NFSv3 file
  * handles for now. This will change if and when we need v4. */
 #define GF_NFSFH_IDENT0         ':'
 #define GF_NFSFH_IDENT1         'O'
 #define GF_NFSFH_IDENT_SIZE     (sizeof(char) * 2)
-#define GF_NFSFH_STATIC_SIZE    (GF_NFSFH_IDENT_SIZE + sizeof (uint16_t) + sizeof (uint16_t) + sizeof (uint64_t) + sizeof(uint64_t))
+#define GF_NFSFH_STATIC_SIZE    (GF_NFSFH_IDENT_SIZE + (2*sizeof (uuid_t)) + sizeof (uint16_t))
 #define GF_NFSFH_MAX_HASH_BYTES (NFS3_FHSIZE - GF_NFSFH_STATIC_SIZE)
 
 /* Each hash element in the file handle is of 2 bytes thus giving
@@ -46,6 +47,7 @@ typedef uint16_t                nfs3_hash_entry_t;
 #define GF_NFSFH_MAXHASHES      ((int)(GF_NFSFH_MAX_HASH_BYTES / GF_NFSFH_ENTRYHASH_SIZE))
 #define nfs3_fh_hashcounted_size(hcount) (GF_NFSFH_STATIC_SIZE + (hcount * GF_NFSFH_ENTRYHASH_SIZE))
 
+#define nfs3_fh_exportid_to_index(exprtid)      ((uint16_t)exprtid[15])
 /* ATTENTION: Change in size of the structure below should be reflected in the
  * GF_NFSFH_STATIC_SIZE.
  */
@@ -56,18 +58,28 @@ struct nfs3_fh {
          */
         char                    ident[2];
 
+        /* UUID that identifies an export. The value stored in exportid
+         * depends on the usage of gluster nfs. If the DVM is enabled using
+         * the nfs.dynamic-volumes option then exportid will contain the UUID
+         * of the volume so that gnfs is able to identify volumes uniquely
+         * through volume additions,deletions,migrations, etc.
+         *
+         * When not using dvm, exportid contains the index of the volume
+         * based on the position of the volume in the list of subvolumes
+         * for gnfs.
+         */
+        uuid_t              exportid;
+
+        /* File/dir gfid. */
+        uuid_t                  gfid;
+
         /* Number of file/ino hash elements that follow the ino. */
         uint16_t                hashcount;
 
-        /* Basically, the position/index of an xlator among the children of
-         * the NFS xlator.
-         */
-        uint16_t                xlatorid;
-        uint64_t                gen;
-        uint64_t                ino;
         nfs3_hash_entry_t       entryhash[GF_NFSFH_MAXHASHES];
 } __attribute__((__packed__));
 
+#define GF_NFS3FH_STATIC_INITIALIZER    {{0},}
 
 extern uint32_t
 nfs3_fh_compute_size (struct nfs3_fh *fh);
@@ -76,16 +88,13 @@ extern int
 nfs3_fh_hash_index_is_beyond (struct nfs3_fh *fh, int hashidx);
 
 extern uint16_t
-nfs3_fh_hash_entry (ino_t ino, uint64_t gen);
+nfs3_fh_hash_entry (uuid_t gfid);
 
 extern int
 nfs3_fh_validate (struct nfs3_fh *fh);
 
-extern xlator_t *
-nfs3_fh_to_xlator (xlator_list_t *cl, struct nfs3_fh *fh);
-
 extern struct nfs3_fh
-nfs3_fh_build_root_fh (xlator_list_t *cl, xlator_t *xl);
+nfs3_fh_build_indexed_root_fh (xlator_list_t *cl, xlator_t *xl);
 
 extern int
 nfs3_fh_is_root_fh (struct nfs3_fh *fh);
@@ -103,4 +112,7 @@ nfs3_fh_to_str (struct nfs3_fh *fh, char *str);
 extern int
 nfs3_fh_build_parent_fh (struct nfs3_fh *child, struct iatt *newstat,
                          struct nfs3_fh *newfh);
+
+extern struct nfs3_fh
+nfs3_fh_build_uuid_root_fh (uuid_t volumeid);
 #endif
diff --git a/xlators/nfs/server/src/nfs3-helpers.c b/xlators/nfs/server/src/nfs3-helpers.c
index 5a5a0b29df3..9ccfb07ca40 100644
--- a/xlators/nfs/server/src/nfs3-helpers.c
+++ b/xlators/nfs/server/src/nfs3-helpers.c
@@ -92,12 +92,12 @@ struct nfs3stat_strerror nfs3stat_strerror_table[] = {
 
 
 void
-nfs3_map_xlid_to_statdev (struct iatt *ia, uint16_t xlid)
+nfs3_map_deviceid_to_statdev (struct iatt *ia, uint64_t deviceid)
 {
         if (!ia)
                 return;
 
-        ia->ia_dev = xlid;
+        ia->ia_dev = deviceid;
 }
 
 
@@ -395,15 +395,11 @@ nfs3_fill_lookup3res_success (lookup3res *res, nfsstat3 stat,
 
         obj.attributes_follow = FALSE;
         dir.attributes_follow = FALSE;
-        if (buf && fh) {
-                nfs3_map_xlid_to_statdev (buf, fh->xlatorid);
+        if (buf)
                 obj = nfs3_stat_to_post_op_attr (buf);
-        }
 
-        if (postparent && fh) {
-                nfs3_map_xlid_to_statdev (postparent, fh->xlatorid);
+        if (postparent)
                 dir = nfs3_stat_to_post_op_attr (postparent);
-        }
 
         res->lookup3res_u.resok.obj_attributes = obj;
         res->lookup3res_u.resok.dir_attributes = dir;
@@ -412,10 +408,13 @@ nfs3_fill_lookup3res_success (lookup3res *res, nfsstat3 stat,
 
 void
 nfs3_fill_lookup3res (lookup3res *res, nfsstat3 stat, struct nfs3_fh *newfh,
-                      struct iatt *buf, struct iatt *postparent)
+                      struct iatt *buf, struct iatt *postparent,
+                      uint64_t deviceid)
 {
 
         memset (res, 0, sizeof (*res));
+        nfs3_map_deviceid_to_statdev (buf, deviceid);
+        nfs3_map_deviceid_to_statdev (postparent, deviceid);
         if (stat != NFS3_OK)
                 nfs3_fill_lookup3res_error (res, stat, postparent);
         else
@@ -432,7 +431,7 @@ nfs3_extract_getattr_fh (getattr3args *args)
 
 void
 nfs3_fill_getattr3res (getattr3res *res, nfsstat3 stat, struct iatt *buf,
-                       uint16_t xlid)
+                       uint64_t deviceid)
 {
 
         memset (res, 0, sizeof (*res));
@@ -440,7 +439,7 @@ nfs3_fill_getattr3res (getattr3res *res, nfsstat3 stat, struct iatt *buf,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (buf, xlid);
+        nfs3_map_deviceid_to_statdev (buf, deviceid);
         res->getattr3res_u.resok.obj_attributes = nfs3_stat_to_fattr3 (buf);
 
 }
@@ -455,7 +454,7 @@ nfs3_extract_fsinfo_fh (fsinfo3args *args)
 
 void
 nfs3_fill_fsinfo3res (struct nfs3_state *nfs3, fsinfo3res *res,
-                      nfsstat3 status, struct iatt *fsroot, uint16_t xlid)
+                      nfsstat3 status, struct iatt *fsroot, uint64_t deviceid)
 {
         fsinfo3resok    resok = {{0}, };
         nfstime3        tdelta = GF_NFS3_TIMEDELTA_SECS;
@@ -465,7 +464,7 @@ nfs3_fill_fsinfo3res (struct nfs3_state *nfs3, fsinfo3res *res,
         if (status != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (fsroot, xlid);
+        nfs3_map_deviceid_to_statdev (fsroot, deviceid);
         resok.obj_attributes = nfs3_stat_to_post_op_attr (fsroot);
         resok.rtmax = nfs3->readsize;
         resok.rtpref = nfs3->readsize;
@@ -677,7 +676,8 @@ nfs3_stat_to_accessbits (struct iatt *buf, uint32_t request, uid_t uid,
 
 void
 nfs3_fill_access3res (access3res *res, nfsstat3 status, struct iatt *buf,
-                      uint32_t accbits, uid_t uid, gid_t gid, uint16_t xlid)
+                      uint32_t accbits, uid_t uid, gid_t gid,
+                      uint64_t deviceid)
 {
         post_op_attr    objattr;
         uint32_t        accres = 0;
@@ -687,7 +687,7 @@ nfs3_fill_access3res (access3res *res, nfsstat3 status, struct iatt *buf,
         if (status != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (buf, xlid);
+        nfs3_map_deviceid_to_statdev (buf, deviceid);
         objattr = nfs3_stat_to_post_op_attr (buf);
         accres = nfs3_stat_to_accessbits (buf, accbits, uid, gid);
 
@@ -829,7 +829,7 @@ nfs3_fh_to_post_op_fh3 (struct nfs3_fh *fh)
 
 
 entryp3 *
-nfs3_fill_entryp3 (gf_dirent_t *entry, struct nfs3_fh *dirfh)
+nfs3_fill_entryp3 (gf_dirent_t *entry, struct nfs3_fh *dirfh, uint64_t devid)
 {
         entryp3         *ent = NULL;
         struct nfs3_fh  newfh = {{0}, };
@@ -862,7 +862,7 @@ nfs3_fill_entryp3 (gf_dirent_t *entry, struct nfs3_fh *dirfh)
         strcpy (ent->name, entry->d_name);
 
         nfs3_fh_build_child_fh (dirfh, &entry->d_stat, &newfh);
-        nfs3_map_xlid_to_statdev (&entry->d_stat, dirfh->xlatorid);
+        nfs3_map_deviceid_to_statdev (&entry->d_stat, devid);
         ent->name_attributes = nfs3_stat_to_post_op_attr (&entry->d_stat);
         ent->name_handle = nfs3_fh_to_post_op_fh3 (&newfh);
 err:
@@ -873,7 +873,8 @@ err:
 void
 nfs3_fill_readdir3res (readdir3res *res, nfsstat3 stat, struct nfs3_fh *dirfh,
                        uint64_t cverf, struct iatt *dirstat,
-                       gf_dirent_t *entries, count3 count, int is_eof)
+                       gf_dirent_t *entries, count3 count, int is_eof,
+                       uint64_t deviceid)
 {
         post_op_attr    dirattr;
         entry3          *ent = NULL;
@@ -887,7 +888,7 @@ nfs3_fill_readdir3res (readdir3res *res, nfsstat3 stat, struct nfs3_fh *dirfh,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (dirstat, dirfh->xlatorid);
+        nfs3_map_deviceid_to_statdev (dirstat, deviceid);
         dirattr = nfs3_stat_to_post_op_attr (dirstat);
         res->readdir3res_u.resok.dir_attributes = dirattr;
         res->readdir3res_u.resok.reply.eof = (bool_t)is_eof;
@@ -928,10 +929,11 @@ nfs3_fill_readdir3res (readdir3res *res, nfsstat3 stat, struct nfs3_fh *dirfh,
 
 
 void
-nfs3_fill_readdirp3res (readdirp3res *res, nfsstat3 stat, struct nfs3_fh *dirfh,
-                        uint64_t cverf, struct iatt *dirstat,
-                        gf_dirent_t *entries, count3 dircount, count3 maxcount,
-                        int is_eof)
+nfs3_fill_readdirp3res (readdirp3res *res, nfsstat3 stat,
+                        struct nfs3_fh *dirfh, uint64_t cverf,
+                        struct iatt *dirstat, gf_dirent_t *entries,
+                        count3 dircount, count3 maxcount, int is_eof,
+                        uint64_t deviceid)
 {
         post_op_attr    dirattr;
         entryp3         *ent = NULL;
@@ -946,7 +948,7 @@ nfs3_fill_readdirp3res (readdirp3res *res, nfsstat3 stat, struct nfs3_fh *dirfh,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (dirstat, dirfh->xlatorid);
+        nfs3_map_deviceid_to_statdev (dirstat, deviceid);
         dirattr = nfs3_stat_to_post_op_attr (dirstat);
         res->readdirp3res_u.resok.dir_attributes = dirattr;
         res->readdirp3res_u.resok.reply.eof = (bool_t)is_eof;
@@ -964,7 +966,7 @@ nfs3_fill_readdirp3res (readdirp3res *res, nfsstat3 stat, struct nfs3_fh *dirfh,
                     (strcmp (entries->d_name, "..") == 0))
                         goto nextentry;
                         */
-                ent = nfs3_fill_entryp3 (entries, dirfh);
+                ent = nfs3_fill_entryp3 (entries, dirfh, deviceid);
                 if (!ent)
                         break;
 
@@ -1050,7 +1052,7 @@ nfs3_prep_fsstat3args (fsstat3args *args, struct nfs3_fh *fh)
 
 void
 nfs3_fill_fsstat3res (fsstat3res *res, nfsstat3 stat, struct statvfs *fsbuf,
-                      struct iatt *postbuf, uint16_t xlid)
+                      struct iatt *postbuf, uint64_t deviceid)
 {
         post_op_attr    poa;
         fsstat3resok    resok;
@@ -1060,7 +1062,7 @@ nfs3_fill_fsstat3res (fsstat3res *res, nfsstat3 stat, struct statvfs *fsbuf,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (postbuf, xlid);
+        nfs3_map_deviceid_to_statdev (postbuf, deviceid);
         poa = nfs3_stat_to_post_op_attr (postbuf);
         resok.tbytes = (size3)(fsbuf->f_frsize * fsbuf->f_blocks);
         resok.fbytes = (size3)(fsbuf->f_bsize * fsbuf->f_bfree);
@@ -1209,7 +1211,7 @@ nfs3_stat_to_wcc_data (struct iatt *pre, struct iatt *post)
 void
 nfs3_fill_create3res (create3res *res, nfsstat3 stat, struct nfs3_fh *newfh,
                       struct iatt *newbuf, struct iatt *preparent,
-                      struct iatt *postparent)
+                      struct iatt *postparent, uint64_t deviceid)
 {
         post_op_attr    poa = {0, };
         wcc_data        dirwcc = {{0}, };
@@ -1220,14 +1222,12 @@ nfs3_fill_create3res (create3res *res, nfsstat3 stat, struct nfs3_fh *newfh,
                 return;
 
         nfs3_fill_post_op_fh3 (newfh, &res->create3res_u.resok.obj);
-        nfs3_map_xlid_to_statdev (newbuf, newfh->xlatorid);
+        nfs3_map_deviceid_to_statdev (newbuf, deviceid);
         poa = nfs3_stat_to_post_op_attr (newbuf);
         res->create3res_u.resok.obj_attributes = poa;
-        if (preparent) {
-                nfs3_map_xlid_to_statdev (preparent, newfh->xlatorid);
-                nfs3_map_xlid_to_statdev (postparent, newfh->xlatorid);
-                dirwcc = nfs3_stat_to_wcc_data (preparent, postparent);
-        }
+        nfs3_map_deviceid_to_statdev (preparent, deviceid);
+        nfs3_map_deviceid_to_statdev (postparent, deviceid);
+        dirwcc = nfs3_stat_to_wcc_data (preparent, postparent);
 
         res->create3res_u.resok.dir_wcc = dirwcc;
 }
@@ -1251,7 +1251,7 @@ nfs3_prep_setattr3args (setattr3args *args, struct nfs3_fh *fh)
 
 void
 nfs3_fill_setattr3res (setattr3res *res, nfsstat3 stat, struct iatt *preop,
-                       struct iatt *postop, uint16_t xlid)
+                       struct iatt *postop, uint64_t deviceid)
 {
         wcc_data        wcc;
         memset (res, 0, sizeof (*res));
@@ -1259,8 +1259,8 @@ nfs3_fill_setattr3res (setattr3res *res, nfsstat3 stat, struct iatt *preop,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (preop, xlid);
-        nfs3_map_xlid_to_statdev (postop, xlid);
+        nfs3_map_deviceid_to_statdev (preop, deviceid);
+        nfs3_map_deviceid_to_statdev (postop, deviceid);
         wcc = nfs3_stat_to_wcc_data (preop, postop);
         res->setattr3res_u.resok.obj_wcc = wcc;
 }
@@ -1279,7 +1279,7 @@ nfs3_prep_mkdir3args (mkdir3args *args, struct nfs3_fh *dirfh, char *name)
 void
 nfs3_fill_mkdir3res (mkdir3res *res, nfsstat3 stat, struct nfs3_fh *fh,
                      struct iatt *buf, struct iatt *preparent,
-                     struct iatt *postparent)
+                     struct iatt *postparent, uint64_t deviceid)
 {
         wcc_data        dirwcc;
         post_op_attr    poa;
@@ -1290,10 +1290,10 @@ nfs3_fill_mkdir3res (mkdir3res *res, nfsstat3 stat, struct nfs3_fh *fh,
                 return;
 
         nfs3_fill_post_op_fh3 (fh, &res->mkdir3res_u.resok.obj);
-        nfs3_map_xlid_to_statdev (buf, fh->xlatorid);
+        nfs3_map_deviceid_to_statdev (buf, deviceid);
         poa = nfs3_stat_to_post_op_attr (buf);
-        nfs3_map_xlid_to_statdev (preparent, fh->xlatorid);
-        nfs3_map_xlid_to_statdev (postparent, fh->xlatorid);
+        nfs3_map_deviceid_to_statdev (preparent, deviceid);
+        nfs3_map_deviceid_to_statdev (postparent, deviceid);
         dirwcc = nfs3_stat_to_wcc_data (preparent, postparent);
         res->mkdir3res_u.resok.obj_attributes = poa;
         res->mkdir3res_u.resok.dir_wcc = dirwcc;
@@ -1315,7 +1315,7 @@ nfs3_prep_symlink3args (symlink3args *args, struct nfs3_fh *dirfh, char *name,
 void
 nfs3_fill_symlink3res (symlink3res *res, nfsstat3 stat, struct nfs3_fh *fh,
                        struct iatt *buf, struct iatt *preparent,
-                       struct iatt *postparent)
+                       struct iatt *postparent, uint64_t deviceid)
 {
         wcc_data        dirwcc;
         post_op_attr    poa;
@@ -1326,10 +1326,10 @@ nfs3_fill_symlink3res (symlink3res *res, nfsstat3 stat, struct nfs3_fh *fh,
                 return;
 
         nfs3_fill_post_op_fh3 (fh, &res->symlink3res_u.resok.obj);
-        nfs3_map_xlid_to_statdev (buf, fh->xlatorid);
+        nfs3_map_deviceid_to_statdev (buf, deviceid);
         poa = nfs3_stat_to_post_op_attr (buf);
-        nfs3_map_xlid_to_statdev (postparent, fh->xlatorid);
-        nfs3_map_xlid_to_statdev (preparent, fh->xlatorid);
+        nfs3_map_deviceid_to_statdev (postparent, deviceid);
+        nfs3_map_deviceid_to_statdev (preparent, deviceid);
         dirwcc = nfs3_stat_to_wcc_data (preparent, postparent);
         res->symlink3res_u.resok.obj_attributes = poa;
         res->symlink3res_u.resok.dir_wcc = dirwcc;
@@ -1348,7 +1348,7 @@ nfs3_prep_readlink3args (readlink3args *args, struct nfs3_fh *fh)
 
 void
 nfs3_fill_readlink3res (readlink3res *res, nfsstat3 stat, char *path,
-                        struct iatt *buf, uint16_t xlid)
+                        struct iatt *buf, uint64_t deviceid)
 {
         post_op_attr    poa;
 
@@ -1358,7 +1358,7 @@ nfs3_fill_readlink3res (readlink3res *res, nfsstat3 stat, char *path,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (buf, xlid);
+        nfs3_map_deviceid_to_statdev (buf, deviceid);
         poa = nfs3_stat_to_post_op_attr (buf);
         res->readlink3res_u.resok.data = (void *)path;
         res->readlink3res_u.resok.symlink_attributes = poa;
@@ -1377,7 +1377,7 @@ nfs3_prep_mknod3args (mknod3args *args, struct nfs3_fh *fh, char *name)
 void
 nfs3_fill_mknod3res (mknod3res *res, nfsstat3 stat, struct nfs3_fh *fh,
                      struct iatt *buf, struct iatt *preparent,
-                     struct iatt *postparent)
+                     struct iatt *postparent, uint64_t deviceid)
 {
         post_op_attr    poa;
         wcc_data        wccdir;
@@ -1388,10 +1388,10 @@ nfs3_fill_mknod3res (mknod3res *res, nfsstat3 stat, struct nfs3_fh *fh,
                 return;
 
         nfs3_fill_post_op_fh3 (fh, &res->mknod3res_u.resok.obj);
-        nfs3_map_xlid_to_statdev (buf, fh->xlatorid);
+        nfs3_map_deviceid_to_statdev (buf, deviceid);
         poa = nfs3_stat_to_post_op_attr (buf);
-        nfs3_map_xlid_to_statdev (preparent, fh->xlatorid);
-        nfs3_map_xlid_to_statdev (postparent, fh->xlatorid);
+        nfs3_map_deviceid_to_statdev (preparent, deviceid);
+        nfs3_map_deviceid_to_statdev (postparent, deviceid);
         wccdir = nfs3_stat_to_wcc_data (preparent, postparent);
         res->mknod3res_u.resok.obj_attributes = poa;
         res->mknod3res_u.resok.dir_wcc = wccdir;
@@ -1401,7 +1401,7 @@ nfs3_fill_mknod3res (mknod3res *res, nfsstat3 stat, struct nfs3_fh *fh,
 
 void
 nfs3_fill_remove3res (remove3res *res, nfsstat3 stat, struct iatt *preparent,
-                      struct iatt *postparent, uint16_t xlid)
+                      struct iatt *postparent, uint64_t deviceid)
 {
         wcc_data        dirwcc;
 
@@ -1410,8 +1410,8 @@ nfs3_fill_remove3res (remove3res *res, nfsstat3 stat, struct iatt *preparent,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (preparent, xlid);
-        nfs3_map_xlid_to_statdev (postparent, xlid);
+        nfs3_map_deviceid_to_statdev (preparent, deviceid);
+        nfs3_map_deviceid_to_statdev (postparent, deviceid);
         dirwcc = nfs3_stat_to_wcc_data (preparent, postparent);
         res->remove3res_u.resok.dir_wcc = dirwcc;
 }
@@ -1437,7 +1437,7 @@ nfs3_prep_rmdir3args (rmdir3args *args, struct nfs3_fh *fh, char *name)
 
 void
 nfs3_fill_rmdir3res (rmdir3res *res, nfsstat3 stat, struct iatt *preparent,
-                     struct iatt *postparent, uint16_t xlid)
+                     struct iatt *postparent, uint64_t deviceid)
 {
         wcc_data        dirwcc;
         memset (res, 0, sizeof (*res));
@@ -1446,8 +1446,8 @@ nfs3_fill_rmdir3res (rmdir3res *res, nfsstat3 stat, struct iatt *preparent,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (postparent, xlid);
-        nfs3_map_xlid_to_statdev (preparent, xlid);
+        nfs3_map_deviceid_to_statdev (postparent, deviceid);
+        nfs3_map_deviceid_to_statdev (preparent, deviceid);
         dirwcc = nfs3_stat_to_wcc_data (preparent, postparent);
         res->rmdir3res_u.resok.dir_wcc = dirwcc;
 }
@@ -1467,7 +1467,7 @@ nfs3_prep_link3args (link3args *args, struct nfs3_fh *target,
 void
 nfs3_fill_link3res (link3res *res, nfsstat3 stat, struct iatt *buf,
                     struct iatt *preparent, struct iatt *postparent,
-                    uint16_t xlid)
+                    uint64_t deviceid)
 {
         post_op_attr    poa;
         wcc_data        dirwcc;
@@ -1477,9 +1477,9 @@ nfs3_fill_link3res (link3res *res, nfsstat3 stat, struct iatt *buf,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (preparent, xlid);
-        nfs3_map_xlid_to_statdev (postparent, xlid);
-        nfs3_map_xlid_to_statdev (buf, xlid);
+        nfs3_map_deviceid_to_statdev (preparent, deviceid);
+        nfs3_map_deviceid_to_statdev (postparent, deviceid);
+        nfs3_map_deviceid_to_statdev (buf,deviceid);
         poa = nfs3_stat_to_post_op_attr (buf);
         dirwcc = nfs3_stat_to_wcc_data (preparent, postparent);
         res->link3res_u.resok.file_attributes = poa;
@@ -1506,7 +1506,7 @@ void
 nfs3_fill_rename3res (rename3res *res, nfsstat3 stat, struct iatt *buf,
                       struct iatt *preoldparent, struct iatt *postoldparent,
                       struct iatt *prenewparent, struct iatt *postnewparent,
-                      uint16_t xlid)
+                      uint64_t deviceid)
 
 {
         wcc_data        dirwcc;
@@ -1516,11 +1516,11 @@ nfs3_fill_rename3res (rename3res *res, nfsstat3 stat, struct iatt *buf,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (preoldparent, xlid);
-        nfs3_map_xlid_to_statdev (postoldparent, xlid);
-        nfs3_map_xlid_to_statdev (prenewparent, xlid);
-        nfs3_map_xlid_to_statdev (postnewparent, xlid);
-        nfs3_map_xlid_to_statdev (buf, xlid);
+        nfs3_map_deviceid_to_statdev (preoldparent, deviceid);
+        nfs3_map_deviceid_to_statdev (postoldparent, deviceid);
+        nfs3_map_deviceid_to_statdev (prenewparent, deviceid);
+        nfs3_map_deviceid_to_statdev (postnewparent, deviceid);
+        nfs3_map_deviceid_to_statdev (buf, deviceid);
         dirwcc = nfs3_stat_to_wcc_data (preoldparent, postoldparent);
         res->rename3res_u.resok.fromdir_wcc = dirwcc;
         dirwcc = nfs3_stat_to_wcc_data (prenewparent, postnewparent);
@@ -1539,7 +1539,7 @@ nfs3_prep_write3args (write3args *args, struct nfs3_fh *fh)
 void
 nfs3_fill_write3res (write3res *res, nfsstat3 stat, count3 count,
                      stable_how stable, uint64_t wverf, struct iatt *prestat,
-                     struct iatt *poststat, uint16_t xlid)
+                     struct iatt *poststat, uint64_t deviceid)
 {
         write3resok     resok;
         memset (res, 0, sizeof (*res));
@@ -1547,8 +1547,8 @@ nfs3_fill_write3res (write3res *res, nfsstat3 stat, count3 count,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (prestat, xlid);
-        nfs3_map_xlid_to_statdev (poststat, xlid);
+        nfs3_map_deviceid_to_statdev (prestat, deviceid);
+        nfs3_map_deviceid_to_statdev (poststat, deviceid);
         resok.file_wcc = nfs3_stat_to_wcc_data (prestat, poststat);
         resok.count = count;
         resok.committed = stable;
@@ -1568,15 +1568,16 @@ nfs3_prep_commit3args (commit3args *args, struct nfs3_fh *fh)
 
 void
 nfs3_fill_commit3res (commit3res *res, nfsstat3 stat, uint64_t wverf,
-                      struct iatt *prestat, struct iatt *poststat,uint16_t xlid)
+                      struct iatt *prestat, struct iatt *poststat,
+                      uint64_t deviceid)
 {
         memset (res, 0, sizeof (*res));
         res->status = stat;
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (poststat, xlid);
-        nfs3_map_xlid_to_statdev (prestat, xlid);
+        nfs3_map_deviceid_to_statdev (poststat, deviceid);
+        nfs3_map_deviceid_to_statdev (prestat, deviceid);
         res->commit3res_u.resok.file_wcc = nfs3_stat_to_wcc_data (prestat,
                                                                   poststat);
         memcpy (res->commit3res_u.resok.verf, &wverf, sizeof (wverf));
@@ -1584,7 +1585,7 @@ nfs3_fill_commit3res (commit3res *res, nfsstat3 stat, uint64_t wverf,
 
 void
 nfs3_fill_read3res (read3res *res, nfsstat3 stat, count3 count,
-                    struct iatt *poststat, int is_eof, uint16_t xlid)
+                    struct iatt *poststat, int is_eof, uint64_t deviceid)
 {
         post_op_attr    poa;
 
@@ -1593,7 +1594,7 @@ nfs3_fill_read3res (read3res *res, nfsstat3 stat, count3 count,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (poststat, xlid);
+        nfs3_map_deviceid_to_statdev (poststat, deviceid);
         poa = nfs3_stat_to_post_op_attr (poststat);
         res->read3res_u.resok.file_attributes = poa;
         res->read3res_u.resok.count = count;
@@ -1612,7 +1613,7 @@ nfs3_prep_read3args (read3args *args, struct nfs3_fh *fh)
 
 void
 nfs3_fill_pathconf3res (pathconf3res *res, nfsstat3 stat, struct iatt *buf,
-                        uint16_t xlid)
+                        uint64_t deviceid)
 {
         pathconf3resok  resok;
 
@@ -1621,7 +1622,7 @@ nfs3_fill_pathconf3res (pathconf3res *res, nfsstat3 stat, struct iatt *buf,
         if (stat != NFS3_OK)
                 return;
 
-        nfs3_map_xlid_to_statdev (buf, xlid);
+        nfs3_map_deviceid_to_statdev (buf, deviceid);
         resok.obj_attributes = nfs3_stat_to_post_op_attr (buf);
         resok.linkmax = 256;
         resok.name_max = NFS_NAME_MAX;
@@ -2496,6 +2497,7 @@ nfs3_fh_resolve_check_entry (struct nfs3_fh *fh, gf_dirent_t *candidate,
         struct iatt             *ia = NULL;
         int                     ret = GF_NFS3_FHRESOLVE_NOTFOUND;
         nfs3_hash_entry_t       entryhash = 0;
+        char                    gfidstr[512];
 
         if ((!fh) || (!candidate))
                 return ret;
@@ -2505,10 +2507,11 @@ nfs3_fh_resolve_check_entry (struct nfs3_fh *fh, gf_dirent_t *candidate,
                 goto found_entry;
 
         ia = &candidate->d_stat;
-        if ((ia->ia_gen == fh->gen) && (ia->ia_ino == fh->ino)) {
-                gf_log (GF_NFS3, GF_LOG_TRACE, "Found entry: gen: %"PRId64
-                        " ino: %"PRId64", name: %s, hashcount %d", ia->ia_gen,
-                        ia->ia_ino, candidate->d_name, hashidx);
+        if ((uuid_compare (candidate->d_stat.ia_gfid, fh->gfid)) == 0) {
+                uuid_unparse (candidate->d_stat.ia_gfid, gfidstr);
+                gf_log (GF_NFS3, GF_LOG_TRACE, "Found entry: gfid: %s, "
+                        "name: %s, hashcount %d", gfidstr, candidate->d_name,
+                        hashidx);
                 ret = GF_NFS3_FHRESOLVE_FOUND;
                 goto found_entry;
         }
@@ -2521,7 +2524,7 @@ nfs3_fh_resolve_check_entry (struct nfs3_fh *fh, gf_dirent_t *candidate,
         if (!IA_ISDIR (candidate->d_stat.ia_type))
                 goto found_entry;
         entryhash = fh->entryhash[hashidx];
-        if (entryhash == nfs3_fh_hash_entry (ia->ia_ino, ia->ia_gen)) {
+        if (entryhash == nfs3_fh_hash_entry (ia->ia_gfid)) {
                 gf_log (GF_NFS3, GF_LOG_TRACE, "Found hash match: %s: %d, "
                         "hashidx: %d", candidate->d_name, entryhash, hashidx);
                 ret = GF_NFS3_FHRESOLVE_DIRFOUND;
@@ -2571,20 +2574,17 @@ nfs3_fh_resolve_readdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 int
 nfs3_fh_resolve_found_entry (nfs3_call_state_t *cs, gf_dirent_t *candidate)
 {
-        uint64_t        dirino = 0;
-        uint64_t        dirgen = 0;
         int             ret = 0;
         nfs_user_t      nfu = {0, };
+        uuid_t          gfid = {0, };
 
         if ((!cs) || (!candidate))
                 return -EFAULT;
 
-        dirino = cs->resolvedloc.inode->ino;
-
+        uuid_copy (gfid, cs->resolvedloc.inode->gfid);
         nfs_loc_wipe (&cs->resolvedloc);
-        ret = nfs_entry_loc_fill (cs->vol->itable, dirino, dirgen,
-                                  candidate->d_name, &cs->resolvedloc,
-                                  NFS_RESOLVE_CREATE);
+        ret = nfs_entry_loc_fill (cs->vol->itable, gfid, candidate->d_name,
+                                  &cs->resolvedloc, NFS_RESOLVE_CREATE);
         if (ret == -ENOENT) {
                 gf_log (GF_NFS3, GF_LOG_TRACE, "Entry not in itable, needs"
                         " lookup");
@@ -2634,20 +2634,17 @@ err:
 int
 nfs3_fh_resolve_found_parent (nfs3_call_state_t *cs, gf_dirent_t *candidate)
 {
-        uint64_t        dirino = 0;
-        uint64_t        dirgen = 0;
         int             ret = 0;
         nfs_user_t      nfu = {0, };
+        uuid_t          gfid = {0, };
 
         if ((!cs) || (!candidate))
                 return -EFAULT;
 
-        dirino = cs->resolvedloc.inode->ino;
-
+        uuid_copy (gfid, cs->resolvedloc.inode->gfid);
         nfs_loc_wipe (&cs->resolvedloc);
-        ret = nfs_entry_loc_fill (cs->vol->itable, dirino, dirgen,
-                                  candidate->d_name, &cs->resolvedloc,
-                                  NFS_RESOLVE_CREATE);
+        ret = nfs_entry_loc_fill (cs->vol->itable, gfid, candidate->d_name,
+                                  &cs->resolvedloc, NFS_RESOLVE_CREATE);
         if (ret == -ENOENT) {
                 nfs_user_root_create (&nfu);
                 ret = nfs_lookup (cs->nfsx, cs->vol, &nfu, &cs->resolvedloc,
@@ -2789,11 +2786,11 @@ out:
 
 
 int
-nfs3_fh_resolve_dir_hard (nfs3_call_state_t *cs, uint64_t ino, uint64_t gen,
-                          char *entry)
+nfs3_fh_resolve_dir_hard (nfs3_call_state_t *cs, uuid_t dirgfid, char *entry)
 {
         int             ret = -EFAULT;
         nfs_user_t      nfu = {0, };
+        char            gfidstr[512];
 
         if (!cs)
                 return ret;
@@ -2808,10 +2805,10 @@ nfs3_fh_resolve_dir_hard (nfs3_call_state_t *cs, uint64_t ino, uint64_t gen,
         }
 
         nfs_user_root_create (&nfu);
-        gf_log (GF_NFS3, GF_LOG_TRACE, "FH hard dir resolution: ino:"
-                " %"PRIu64", gen: %"PRIu64", entry: %s, next hashcount: %d",
-                ino, gen, entry, cs->hashidx);
-        ret = nfs_entry_loc_fill (cs->vol->itable, ino, gen, entry,
+        uuid_unparse (dirgfid, gfidstr);
+        gf_log (GF_NFS3, GF_LOG_TRACE, "FH hard dir resolution: gfid: %s, "
+                "entry: %s, next hashcount: %d", gfidstr, entry, cs->hashidx);
+        ret = nfs_entry_loc_fill (cs->vol->itable, dirgfid, entry,
                                   &cs->resolvedloc, NFS_RESOLVE_CREATE);
 
         if (ret == 0) {
@@ -2851,21 +2848,17 @@ int
 nfs3_fh_resolve_check_response (nfs3_call_state_t *cs, gf_dirent_t *candidate,
                                 int response, off_t last_offt)
 {
-        uint64_t        dirino = 0;
-        uint64_t        dirgen = 0;
         int             ret = -EFAULT;
         nfs_user_t      nfu = {0, };
 
         if (!cs)
                 return ret;
 
-        dirino = cs->resolvedloc.inode->ino;
-
         switch (response) {
 
         case GF_NFS3_FHRESOLVE_DIRFOUND:
                 nfs3_fh_resolve_close_cwd (cs);
-                nfs3_fh_resolve_dir_hard (cs, dirino, dirgen,
+                nfs3_fh_resolve_dir_hard (cs, cs->resolvedloc.inode->gfid,
                                           candidate->d_name);
                 break;
 
@@ -2891,6 +2884,7 @@ nfs3_fh_resolve_search_dir (nfs3_call_state_t *cs, gf_dirent_t *entries)
         gf_dirent_t     *candidate = NULL;
         int             ret = GF_NFS3_FHRESOLVE_NOTFOUND;
         off_t           lastoff = 0;
+        char            gfidstr[512];
 
         if ((!cs) || (!entries))
                 return -EFAULT;
@@ -2900,9 +2894,9 @@ nfs3_fh_resolve_search_dir (nfs3_call_state_t *cs, gf_dirent_t *entries)
 
         list_for_each_entry (candidate, &entries->list, list) {
                 lastoff = candidate->d_off;
-                gf_log (GF_NFS3, GF_LOG_TRACE, "Candidate: %s, ino: %"PRIu64
-                        ", gen: %"PRIu64, candidate->d_name, candidate->d_ino,
-                        candidate->d_stat.ia_gen);
+                uuid_unparse (candidate->d_stat.ia_gfid, gfidstr);
+                gf_log (GF_NFS3, GF_LOG_TRACE, "Candidate: %s, gfid: %s",
+                        PRIu64, candidate->d_name, gfidstr);
                 ret = nfs3_fh_resolve_check_entry (&cs->resolvefh, candidate,
                                                    cs->hashidx);
                 if (ret != GF_NFS3_FHRESOLVE_NOTFOUND)
@@ -2946,6 +2940,7 @@ nfs3_fh_resolve_inode_hard (nfs3_call_state_t *cs)
 {
         int             ret = -EFAULT;
         nfs_user_t      nfu = {0, };
+        char            gfidstr[512];
 
         if (!cs)
                 return ret;
@@ -2960,11 +2955,11 @@ nfs3_fh_resolve_inode_hard (nfs3_call_state_t *cs)
         }
 
         nfs_user_root_create (&nfu);
-        gf_log (GF_NFS3, GF_LOG_TRACE, "FH hard resolution for: ino:"
-                " %"PRIu64", gen: %"PRIu64", hashcount: %d, current hashidx "
-                "%d", cs->resolvefh.ino, cs->resolvefh.gen,
+        uuid_unparse (cs->resolvefh.gfid, gfidstr);
+        gf_log (GF_NFS3, GF_LOG_TRACE, "FH hard resolution for: gfid 0x%s",
+                ", hashcount: %d, current hashidx %d", gfidstr,
                 cs->resolvefh.hashcount, cs->hashidx);
-        ret = nfs_ino_loc_fill (cs->vol->itable, 1, 0, &cs->resolvedloc);
+        ret = nfs_root_loc_fill (cs->vol->itable, &cs->resolvedloc);
 
         if (ret == 0) {
                 gf_log (GF_NFS3, GF_LOG_TRACE, "Dir will be opened: %s",
@@ -2988,20 +2983,21 @@ nfs3_fh_resolve_entry_hard (nfs3_call_state_t *cs)
 {
         int             ret = -EFAULT;
         nfs_user_t      nfu = {0, };
+        char            gfidstr[512];
 
         if (!cs)
                 return ret;
 
         nfs_loc_wipe (&cs->resolvedloc);
         nfs_user_root_create (&nfu);
-        gf_log (GF_NFS3, GF_LOG_TRACE, "FH hard resolution: ino:"
-                " %"PRIu64", gen: %"PRIu64", entry: %s, hashidx: %d",
-                cs->resolvefh.ino, cs->resolvefh.gen, cs->resolventry,
+        uuid_unparse (cs->resolvefh.gfid, gfidstr);
+        gf_log (GF_NFS3, GF_LOG_TRACE, "FH hard resolution: gfid: %s "
+                ", entry: %s, hashidx: %d", gfidstr, cs->resolventry,
                 cs->hashidx);
 
-        ret = nfs_entry_loc_fill (cs->vol->itable, cs->resolvefh.ino,
-                                  cs->resolvefh.gen, cs->resolventry,
-                                  &cs->resolvedloc, NFS_RESOLVE_CREATE);
+        ret = nfs_entry_loc_fill (cs->vol->itable, cs->resolvefh.gfid,
+                                  cs->resolventry, &cs->resolvedloc,
+                                  NFS_RESOLVE_CREATE);
 
         if (ret == -2) {
                 gf_log (GF_NFS3, GF_LOG_TRACE, "Entry needs lookup: %s",
@@ -3031,8 +3027,7 @@ nfs3_fh_resolve_inode (nfs3_call_state_t *cs)
                 return ret;
 
         gf_log (GF_NFS3, GF_LOG_TRACE, "FH needs inode resolution");
-        inode = inode_get (cs->vol->itable, cs->resolvefh.ino,
-                           cs->resolvefh.gen);
+        inode = inode_find (cs->vol->itable, cs->resolvefh.gfid);
         if (!inode)
                 ret = nfs3_fh_resolve_inode_hard (cs);
         else
diff --git a/xlators/nfs/server/src/nfs3-helpers.h b/xlators/nfs/server/src/nfs3-helpers.h
index db76b5cce77..b708993c400 100644
--- a/xlators/nfs/server/src/nfs3-helpers.h
+++ b/xlators/nfs/server/src/nfs3-helpers.h
@@ -46,7 +46,8 @@ nfs3_errno_to_nfsstat3 (int errnum);
 
 extern void
 nfs3_fill_lookup3res (lookup3res *res, nfsstat3 stat, struct nfs3_fh *newfh,
-                      struct iatt *stbuf, struct iatt *postparent);
+                      struct iatt *stbuf, struct iatt *postparent,
+                      uint64_t deviceid);
 
 extern post_op_attr
 nfs3_stat_to_post_op_attr (struct iatt *buf);
@@ -56,14 +57,14 @@ nfs3_extract_getattr_fh (getattr3args *args);
 
 extern void
 nfs3_fill_getattr3res (getattr3res *res, nfsstat3 stat, struct iatt *buf,
-                       uint16_t xlid);
+                       uint64_t deviceid);
 
 extern struct nfs3_fh
 nfs3_extract_fsinfo_fh (fsinfo3args *args);
 
 extern void
 nfs3_fill_fsinfo3res (struct nfs3_state *nfs3, fsinfo3res *res,
-                      nfsstat3 status, struct iatt *fsroot, uint16_t xlid);
+                      nfsstat3 status, struct iatt *fsroot,uint64_t deviceid);
 
 /* Functions containing _prep_ are used specifically to work around
  * the memory allocations that happen inside Sun RPC library.
@@ -99,7 +100,8 @@ nfs3_prep_access3args (access3args *args, struct nfs3_fh *fh);
 
 extern void
 nfs3_fill_access3res (access3res *res, nfsstat3 status, struct iatt *buf,
-                      uint32_t accbits, uid_t uid, gid_t gid, uint16_t xlid);
+                      uint32_t accbits, uid_t uid, gid_t gid,
+                      uint64_t deviceid);
 
 extern char *
 nfs3_fhcache_getpath (struct nfs3_state *nfs3, struct nfs3_fh *fh);
@@ -113,16 +115,18 @@ nfs3_prep_readdir3args (readdir3args *ra, struct nfs3_fh *fh);
 extern void
 nfs3_fill_readdir3res (readdir3res *res, nfsstat3 stat, struct nfs3_fh *dfh,
                        uint64_t cverf, struct iatt *dirstat,
-                       gf_dirent_t *entries, count3 count, int is_eof);
+                       gf_dirent_t *entries, count3 count, int is_eof,
+                       uint64_t deviceid);
 
 extern void
 nfs3_prep_readdirp3args (readdirp3args *ra, struct nfs3_fh *fh);
 
 extern void
-nfs3_fill_readdirp3res (readdirp3res *res, nfsstat3 stat, struct nfs3_fh *dirfh,
-                        uint64_t cverf, struct iatt *dirstat,
-                        gf_dirent_t *entries, count3 dircount, count3 maxcount,
-                        int is_eof);
+nfs3_fill_readdirp3res (readdirp3res *res, nfsstat3 stat,
+                        struct nfs3_fh *dirfh, uint64_t cverf,
+                        struct iatt *dirstat, gf_dirent_t *entries,
+                        count3 dircount, count3 maxcount, int is_eof,
+                        uint64_t deviceid);
 
 extern void
 nfs3_free_readdirp3res (readdirp3res *res);
@@ -135,14 +139,14 @@ nfs3_prep_fsstat3args (fsstat3args *args, struct nfs3_fh *fh);
 
 extern void
 nfs3_fill_fsstat3res (fsstat3res *res, nfsstat3 stat, struct statvfs *fsbuf,
-                      struct iatt *postbuf, uint16_t xlid);
+                      struct iatt *postbuf, uint64_t deviceid);
 
 extern int32_t
 nfs3_sattr3_to_setattr_valid (sattr3 *sattr, struct iatt *buf, mode_t *omode);
 extern void
 nfs3_fill_create3res (create3res *res, nfsstat3 stat, struct nfs3_fh *newfh,
                       struct iatt *newbuf, struct iatt *preparent,
-                      struct iatt *postparent);
+                      struct iatt *postparent, uint64_t deviceid);
 
 extern void
 nfs3_prep_create3args (create3args *args, struct nfs3_fh *fh, char *name);
@@ -152,7 +156,7 @@ nfs3_prep_setattr3args (setattr3args *args, struct nfs3_fh *fh);
 
 extern void
 nfs3_fill_setattr3res (setattr3res *res, nfsstat3 stat, struct iatt *preop,
-                       struct iatt *postop, uint16_t xlid);
+                       struct iatt *postop, uint64_t deviceid);
 
 extern void
 nfs3_prep_mkdir3args (mkdir3args *args, struct nfs3_fh *dirfh, char *name);
@@ -160,7 +164,7 @@ nfs3_prep_mkdir3args (mkdir3args *args, struct nfs3_fh *dirfh, char *name);
 extern void
 nfs3_fill_mkdir3res (mkdir3res *res, nfsstat3 stat, struct nfs3_fh *fh,
                      struct iatt *buf, struct iatt *preparent,
-                     struct iatt *postparent);
+                     struct iatt *postparent, uint64_t deviceid);
 
 extern void
 nfs3_prep_symlink3args (symlink3args *args, struct nfs3_fh *dirfh, char *name,
@@ -169,14 +173,14 @@ nfs3_prep_symlink3args (symlink3args *args, struct nfs3_fh *dirfh, char *name,
 extern void
 nfs3_fill_symlink3res (symlink3res *res, nfsstat3 stat, struct nfs3_fh *fh,
                        struct iatt *buf, struct iatt *preparent,
-                       struct iatt *postparent);
+                       struct iatt *postparent, uint64_t deviceid);
 
 extern void
 nfs3_prep_readlink3args (readlink3args *args, struct nfs3_fh *fh);
 
 extern void
 nfs3_fill_readlink3res (readlink3res *res, nfsstat3 stat, char *path,
-                        struct iatt *buf, uint16_t xlid);
+                        struct iatt *buf, uint64_t deviceid);
 
 extern void
 nfs3_prep_mknod3args (mknod3args *args, struct nfs3_fh *fh, char *name);
@@ -184,17 +188,17 @@ nfs3_prep_mknod3args (mknod3args *args, struct nfs3_fh *fh, char *name);
 extern void
 nfs3_fill_mknod3res (mknod3res *res, nfsstat3 stat, struct nfs3_fh *fh,
                      struct iatt *buf, struct iatt *preparent,
-                     struct iatt *postparent);
+                     struct iatt *postparent, uint64_t deviceid);
 
 extern void
 nfs3_fill_remove3res (remove3res *res, nfsstat3 stat, struct iatt *preparent,
-                      struct iatt *postparent, uint16_t xlid);
+                      struct iatt *postparent, uint64_t deviceid);
 extern void
 nfs3_prep_remove3args (remove3args *args, struct nfs3_fh *fh, char *name);
 
 extern void
 nfs3_fill_rmdir3res (rmdir3res *res, nfsstat3 stat, struct iatt *preparent,
-                     struct iatt *postparent, uint16_t xlid);
+                     struct iatt *postparent, uint64_t deviceid);
 
 extern void
 nfs3_prep_rmdir3args (rmdir3args *args, struct nfs3_fh *fh, char *name);
@@ -202,7 +206,7 @@ nfs3_prep_rmdir3args (rmdir3args *args, struct nfs3_fh *fh, char *name);
 extern void
 nfs3_fill_link3res (link3res *res, nfsstat3 stat, struct iatt *buf,
                     struct iatt *preparent, struct iatt *postparent,
-                    uint16_t xlid);
+                    uint64_t deviceid);
 
 extern void
 nfs3_prep_link3args (link3args *args, struct nfs3_fh *target,
@@ -217,7 +221,7 @@ extern void
 nfs3_fill_rename3res (rename3res *res, nfsstat3 stat, struct iatt *buf,
                       struct iatt *preoldparent, struct iatt *postoldparent,
                       struct iatt *prenewparent, struct iatt *postnewparent,
-                      uint16_t xlid);
+                      uint64_t deviceid);
 
 extern void
 nfs3_prep_write3args (write3args *args, struct nfs3_fh *fh);
@@ -225,7 +229,7 @@ nfs3_prep_write3args (write3args *args, struct nfs3_fh *fh);
 extern void
 nfs3_fill_write3res (write3res *res, nfsstat3 stat, count3 count,
                      stable_how stable, uint64_t wverf, struct iatt *prestat,
-                     struct iatt *poststat, uint16_t xlid);
+                     struct iatt *poststat, uint64_t deviceid);
 
 extern void
 nfs3_prep_commit3args (commit3args *args, struct nfs3_fh *fh);
@@ -233,11 +237,11 @@ nfs3_prep_commit3args (commit3args *args, struct nfs3_fh *fh);
 extern void
 nfs3_fill_commit3res (commit3res *res, nfsstat3 stat, uint64_t wverf,
                       struct iatt *prestat, struct iatt *poststat,
-                      uint16_t xlid);
+                      uint64_t deviceid);
 
 extern void
 nfs3_fill_read3res (read3res *res, nfsstat3 stat, count3 count,
-                    struct iatt *poststat, int is_eof, uint16_t xlid);
+                    struct iatt *poststat, int is_eof, uint64_t deviceid);
 
 extern void
 nfs3_prep_read3args (read3args *args, struct nfs3_fh *fh);
@@ -247,7 +251,7 @@ nfs3_prep_pathconf3args (pathconf3args *args, struct nfs3_fh *fh);
 
 extern void
 nfs3_fill_pathconf3res (pathconf3res *res, nfsstat3 stat, struct iatt *buf,
-                        uint16_t xlid);
+                        uint64_t deviceid);
 
 extern int
 nfs3_cached_inode_opened (xlator_t *nfsxl, inode_t *inode);
diff --git a/xlators/nfs/server/src/nfs3.c b/xlators/nfs/server/src/nfs3.c
index 057ccb60e25..c4aaef3c308 100644
--- a/xlators/nfs/server/src/nfs3.c
+++ b/xlators/nfs/server/src/nfs3.c
@@ -67,11 +67,86 @@
                 }                                                       \
         } while (0);                                                    \
 
-#define nfs3_export_access(nfs3state, xlid) ((nfs3state)->exports[xlid]).access
 
-#define nfs3_check_rw_volaccess(nfs3state, xlid, status, label)          \
-        do {                                                             \
-                if (nfs3_export_access (nfs3state,xlid)!=GF_NFS3_VOLACCESS_RW){\
+struct nfs3_export *
+__nfs3_get_export_by_index (struct nfs3_state *nfs3, uuid_t exportid)
+{
+        struct nfs3_export      *exp = NULL;
+        int                     index = 0;
+        int                     searchindex = 0;
+
+        searchindex = nfs3_fh_exportid_to_index (exportid);
+        list_for_each_entry (exp, &nfs3->exports, explist) {
+                if (searchindex == index)
+                        goto found;
+
+                ++index;
+        }
+
+        exp = NULL;
+found:
+        return exp;
+}
+
+
+struct nfs3_export *
+__nfs3_get_export_by_volumeid (struct nfs3_state *nfs3, uuid_t exportid)
+{
+        struct nfs3_export      *exp = NULL;
+
+        list_for_each_entry (exp, &nfs3->exports, explist) {
+                if (!uuid_compare (exportid, exp->volumeid))
+                        goto found;
+        }
+
+        exp = NULL;
+found:
+        return exp;
+}
+
+
+struct nfs3_export *
+__nfs3_get_export_by_exportid (struct nfs3_state *nfs3, uuid_t exportid)
+{
+        struct nfs3_export      *exp = NULL;
+
+        if (!nfs3)
+                return exp;
+
+        if (gf_nfs_dvm_off (nfs_state(nfs3->nfsx)))
+                exp = __nfs3_get_export_by_index (nfs3, exportid);
+        else
+                exp = __nfs3_get_export_by_volumeid (nfs3, exportid);
+
+        return exp;
+}
+
+
+int
+nfs3_export_access (struct nfs3_state *nfs3, uuid_t exportid)
+{
+        int                     ret = GF_NFS3_VOLACCESS_RO;
+        struct nfs3_export      *exp = NULL;
+
+        if (!nfs3)
+                return ret;
+
+        exp = __nfs3_get_export_by_exportid (nfs3, exportid);
+
+        if (!exp) {
+                gf_log (GF_NFS3, GF_LOG_ERROR, "Failed to get export by ID");
+                goto err;
+        }
+
+        ret = exp->access;
+
+err:
+        return ret;
+}
+
+#define nfs3_check_rw_volaccess(nfs3state, exid, status, label)         \
+        do {                                                            \
+                if (nfs3_export_access (nfs3state,exid)!=GF_NFS3_VOLACCESS_RW){\
                         gf_log (GF_NFS3, GF_LOG_TRACE, "No read-write access");\
                         status = NFS3ERR_ROFS;                          \
                         goto label;                                     \
@@ -80,9 +155,28 @@
 
 
 
+xlator_t *
+nfs3_fh_to_xlator (struct nfs3_state *nfs3, struct nfs3_fh *fh)
+{
+        xlator_t                *vol = NULL;
+        struct nfs3_export      *exp = NULL;
+
+        if ((!nfs3) || (!fh))
+                return vol;
+
+        exp = __nfs3_get_export_by_exportid (nfs3, fh->exportid);
+        if (!exp)
+                goto out;
+
+        vol = exp->subvol;
+out:
+        return vol;
+}
+
+
 #define nfs3_map_fh_to_volume(nfs3state, handle, rqst, volume, status, label) \
         do {                                                            \
-                volume = nfs3_fh_to_xlator ((nfs3state)->exportslist, handle); \
+                volume = nfs3_fh_to_xlator ((nfs3state), handle);       \
                 if (!volume) {                                          \
                         gf_log (GF_NFS3, GF_LOG_ERROR, "Failed to map " \
                                 "FH to vol");                           \
@@ -124,6 +218,29 @@
         } while (0)                                                     \
 
 
+int
+__nfs3_get_volume_id (struct nfs3_state *nfs3, xlator_t *xl,
+                      uuid_t volumeid)
+{
+        int                     ret = -1;
+        struct nfs3_export      *exp = NULL;
+
+        if ((!nfs3) || (!xl))
+                return ret;
+
+        list_for_each_entry (exp, &nfs3->exports, explist) {
+                if (exp->subvol == xl) {
+                        uuid_copy (volumeid, exp->volumeid);
+                        ret = 0;
+                        goto out;
+                }
+        }
+
+out:
+        return ret;
+}
+
+
 #define nfs3_funge_solaris_zerolen_fh(nfs3st, fhd, enam, nfsst, erl)    \
         do {                                                            \
                 xlator_t        *fungexl = NULL;                        \
@@ -133,16 +250,56 @@
                         goto erl;                                       \
                 }                                                       \
                                                                         \
-                (fhd)->xlatorid = nfs_xlator_to_xlid ((nfs3st)->exportslist, \
-                                                      fungexl);         \
-                (fhd)->gen = 0;                                         \
-                (fhd)->ino = 1;                                         \
-                (enam) = NULL;                                          \
+                if ((gf_nfs_dvm_off (nfs_state (nfs3st->nfsx)))) {      \
+                        (fhd)->exportid[15] = nfs_xlator_to_xlid ((nfs3st)->exportslist, fungexl);                                                 \
+                        (fhd)->gfid[15] = 1;                            \
+                        (enam) = NULL;                                  \
+                } else {                                                \
+                        if(!__nfs3_get_volume_id ((nfs3st), fungexl, (fhd)->exportid)) { \
+                                (nfsst) = NFS3ERR_STALE;                \
+                                goto erl;                               \
+                        }                                               \
+                }                                                       \
         } while (0)                                                     \
 
 
-#define nfs3_export_sync_trusted(nf3stt, xlid) ((nf3stt)->exports[xlid]).trusted_sync
-#define nfs3_export_write_trusted(nf3stt, xlid) ((nf3stt)->exports[xlid]).trusted_write
+
+int
+nfs3_export_sync_trusted (struct nfs3_state *nfs3, uuid_t exportid)
+{
+        struct nfs3_export      *exp = NULL;
+        int                     ret = 0;
+
+        if (!nfs3)
+                return ret;
+
+        exp = __nfs3_get_export_by_exportid (nfs3, exportid);
+        if (!exp)
+                goto err;
+
+        ret = exp->trusted_sync;
+err:
+        return ret;
+}
+
+
+int
+nfs3_export_write_trusted (struct nfs3_state *nfs3, uuid_t exportid)
+{
+        struct nfs3_export      *exp = NULL;
+        int                     ret = 0;
+
+        if (!nfs3)
+                return ret;
+
+        exp = __nfs3_get_export_by_exportid (nfs3, exportid);
+        if (!exp)
+                goto err;
+
+        ret = exp->trusted_write;
+err:
+        return ret;
+}
 
 int
 nfs3_solaris_zerolen_fh (struct nfs3_fh *fh, int fhlen)
@@ -355,18 +512,27 @@ err:
 }
 
 
-uint16_t
-nfs3_request_xlator_id (rpcsvc_request_t *rq)
+uint64_t
+nfs3_request_xlator_deviceid (rpcsvc_request_t *rq)
 {
         struct nfs3_state       *nfs3 = NULL;
         xlator_t                *xl = NULL;
+        uint64_t                devid = 0;
+        uuid_t                  volumeid = {0, };
 
         if (!rq)
                 return 0;
 
         xl = nfs_rpcsvc_request_private (rq);
         nfs3 = nfs_rpcsvc_request_program_private (rq);
-        return nfs_xlator_to_xlid (nfs3->exportslist, xl);
+        if (gf_nfs_dvm_off (nfs_state (nfs3->nfsx)))
+                devid = (uint64_t)nfs_xlator_to_xlid (nfs3->exportslist, xl);
+        else {
+                __nfs3_get_volume_id (nfs3, xl, volumeid);
+                memcpy (&devid, &volumeid[15], sizeof (devid));
+        }
+
+        return devid;
 }
 
 
@@ -386,10 +552,10 @@ int
 nfs3_getattr_reply (rpcsvc_request_t *req, nfsstat3 status, struct iatt *buf)
 {
         getattr3res     res;
-        uint16_t        xlid = 0;
+        uint64_t        deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
-        nfs3_fill_getattr3res (&res, status, buf, xlid);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_getattr3res (&res, status, buf, deviceid);
         nfs3svc_submit_reply (req, &res,
                               (nfs3_serializer)xdr_serialize_getattr3res);
 
@@ -558,10 +724,10 @@ nfs3_setattr_reply (rpcsvc_request_t *req, nfsstat3 stat, struct iatt *preop,
                     struct iatt *postop)
 {
         setattr3res     res = {0, };
-        uint16_t        xlid = 0;
+        uint64_t        deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
-        nfs3_fill_setattr3res (&res, stat, preop, postop, xlid);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_setattr3res (&res, stat, preop, postop, deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer) xdr_serialize_setattr3res);
         return 0;
@@ -761,7 +927,7 @@ nfs3_setattr (rpcsvc_request_t *req, struct nfs3_fh *fh, sattr3 *sattr,
         nfs3_validate_gluster_fh (fh, stat, nfs3err);
         nfs3_validate_nfs3_state (req, nfs3, stat, nfs3err, ret);
         nfs3_map_fh_to_volume (nfs3, fh, req, vol, stat, nfs3err);
-        nfs3_check_rw_volaccess (nfs3, fh->xlatorid, stat, nfs3err);
+        nfs3_check_rw_volaccess (nfs3, fh->exportid, stat, nfs3err);
         nfs3_handle_call_state_init (nfs3, cs, req, vol, stat, nfs3err);
 
         cs->setattr_valid = nfs3_sattr3_to_setattr_valid (sattr, &cs->stbuf,
@@ -837,8 +1003,10 @@ nfs3_lookup_reply (rpcsvc_request_t *req, nfsstat3 stat, struct nfs3_fh *newfh,
                    struct iatt *stbuf, struct iatt *postparent)
 {
         lookup3res      res = {0, };
+        uint64_t        deviceid = 0;
 
-        nfs3_fill_lookup3res (&res, stat, newfh, stbuf, postparent);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_lookup3res (&res, stat, newfh, stbuf, postparent, deviceid);
         return nfs3svc_submit_reply (req, &res,
                                      (nfs3_serializer)xdr_serialize_lookup3res);
 }
@@ -880,6 +1048,8 @@ nfs3svc_lookup_parentdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         struct nfs3_fh                  newfh = {{0}, };
         nfsstat3                        status = NFS3_OK;
         nfs3_call_state_t               *cs = NULL;
+        uuid_t                          volumeid = {0, };
+        struct nfs3_state               *nfs3 = NULL;
 
         cs = frame->local;
         if (op_ret == -1) {
@@ -887,15 +1057,23 @@ nfs3svc_lookup_parentdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                 goto xmit_res;
         }
 
+        nfs3 = cs->nfs3state;
         /* If the buf inode shows that this is a root dir's buf, then the file
          * handle needs to be specially crafted, in all other cases, we'll just
          * create the handle normally using the buffer of the parent dir.
          */
-        if (buf->ia_ino != 1)
+        if (buf->ia_ino != 1) {
                 nfs3_fh_build_parent_fh (&cs->fh, buf, &newfh);
-        else
-                newfh = nfs3_fh_build_root_fh (cs->nfs3state->exportslist,
-                                               cs->vol);
+                goto xmit_res;
+        }
+
+        if (gf_nfs_dvm_off (nfs_state (nfs3->nfsx)))
+                newfh = nfs3_fh_build_indexed_root_fh (nfs3->exportslist,
+                                                       cs->vol);
+        else {
+                __nfs3_get_volume_id (nfs3, cs->vol, volumeid);
+                newfh = nfs3_fh_build_uuid_root_fh (volumeid);
+        }
 
 xmit_res:
         nfs3_log_newfh_res (nfs_rpcsvc_request_xid (cs->req), "LOOKUP", status,
@@ -1095,13 +1273,12 @@ nfs3_access_reply (rpcsvc_request_t *req, nfsstat3 status, struct iatt *buf,
                    uint32_t accbits)
 {
         access3res      res;
-        uint16_t        xlid = 0;
+        uint64_t        deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
+        deviceid = nfs3_request_xlator_deviceid (req);
         nfs3_fill_access3res (&res, status, buf, accbits,
                               nfs_rpcsvc_request_uid (req),
-                              nfs_rpcsvc_request_gid (req)
-                              , xlid);
+                              nfs_rpcsvc_request_gid (req), deviceid);
         nfs3svc_submit_reply (req, &res,
                               (nfs3_serializer)xdr_serialize_access3res);
         return 0;
@@ -1231,10 +1408,10 @@ nfs3_readlink_reply (rpcsvc_request_t *req, nfsstat3 stat, char *path,
                      struct iatt *buf)
 {
         readlink3res    res = {0, };
-        uint16_t        xlid = 0;
+        uint64_t        deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
-        nfs3_fill_readlink3res (&res, stat, path, buf, xlid);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_readlink3res (&res, stat, path, buf, deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer)xdr_serialize_readlink3res);
 
@@ -1374,10 +1551,10 @@ nfs3_read_reply (rpcsvc_request_t *req, nfsstat3 stat, count3 count,
                  struct iatt *poststat, int is_eof)
 {
         read3res                res = {0, };
-        uint16_t                xlid = 0;
+        uint64_t                deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
-        nfs3_fill_read3res (&res, stat, count, poststat, is_eof, xlid);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_read3res (&res, stat, count, poststat, is_eof, deviceid);
         if (stat == NFS3_OK) {
                 nfs_xdr_vector_round_up (vec, vcount, count);
                 /* iob can be zero if the file size was zero. If so, op_ret
@@ -1564,11 +1741,11 @@ nfs3_write_reply (rpcsvc_request_t *req, nfsstat3 stat, count3 count,
                   struct iatt *poststat)
 {
         write3res       res = {0, };
-        uint16_t        xlid = 0;
+        uint64_t        deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
+        deviceid = nfs3_request_xlator_deviceid (req);
         nfs3_fill_write3res (&res, stat, count, stable, wverf, prestat,
-                             poststat, xlid);
+                             poststat, deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer)xdr_serialize_write3res);
 
@@ -1692,9 +1869,9 @@ nfs3svc_write_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         cs->maxcount = op_ret;
 
         write_trusted = nfs3_export_write_trusted (cs->nfs3state,
-                                                   cs->resolvefh.xlatorid);
+                                                   cs->resolvefh.exportid);
         sync_trusted = nfs3_export_sync_trusted (cs->nfs3state,
-                                                 cs->resolvefh.xlatorid);
+                                                 cs->resolvefh.exportid);
         ret = nfs3_write_how (&cs->writetype, write_trusted, sync_trusted);
         if (ret == -1)
                 goto err;
@@ -1831,7 +2008,7 @@ nfs3_write (rpcsvc_request_t *req, struct nfs3_fh *fh, offset3 offset,
         nfs3_validate_gluster_fh (fh, stat, nfs3err);
         nfs3_validate_nfs3_state (req, nfs3, stat, nfs3err, ret);
         nfs3_map_fh_to_volume (nfs3, fh, req, vol, stat, nfs3err);
-        nfs3_check_rw_volaccess (nfs3, fh->xlatorid, stat, nfs3err);
+        nfs3_check_rw_volaccess (nfs3, fh->exportid, stat, nfs3err);
         nfs3_handle_call_state_init (nfs3, cs, req, vol, stat, nfs3err);
         cs->datacount = count;
         cs->dataoffset = offset;
@@ -1983,8 +2160,11 @@ nfs3_create_reply (rpcsvc_request_t *req, nfsstat3 stat, struct nfs3_fh *newfh,
                    struct iatt *postparent)
 {
         create3res      res = {0, };
+        uint64_t        deviceid = 0;
 
-        nfs3_fill_create3res (&res, stat, newfh, newbuf, preparent, postparent);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_create3res (&res, stat, newfh, newbuf, preparent, postparent,
+                              deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer)xdr_serialize_create3res);
         return 0;
@@ -2219,7 +2399,7 @@ nfs3_create (rpcsvc_request_t *req, struct nfs3_fh *dirfh, char *name,
         nfs3_validate_nfs3_state (req, nfs3, stat, nfs3err, ret);
         nfs3_validate_strlen_or_goto (name, NFS_NAME_MAX, nfs3err, stat, ret);
         nfs3_map_fh_to_volume (nfs3, dirfh, req, vol, stat, nfs3err);
-        nfs3_check_rw_volaccess (nfs3, dirfh->xlatorid, stat, nfs3err);
+        nfs3_check_rw_volaccess (nfs3, dirfh->exportid, stat, nfs3err);
         nfs3_handle_call_state_init (nfs3, cs, req, vol, stat, nfs3err);
 
         cs->cookieverf = cverf;
@@ -2284,8 +2464,11 @@ nfs3_mkdir_reply (rpcsvc_request_t *req, nfsstat3 stat, struct nfs3_fh *fh,
                   struct iatt *postparent)
 {
         mkdir3res       res = {0, };
+        uint64_t        deviceid = 0;
 
-        nfs3_fill_mkdir3res (&res, stat, fh, buf, preparent, postparent);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_mkdir3res (&res, stat, fh, buf, preparent, postparent,
+                             deviceid);
         nfs3svc_submit_reply (req, &res,
                               (nfs3_serializer)xdr_serialize_mkdir3res);
         return 0;
@@ -2423,7 +2606,7 @@ nfs3_mkdir (rpcsvc_request_t *req, struct nfs3_fh *dirfh, char *name,
         nfs3_validate_nfs3_state (req, nfs3, stat, nfs3err, ret);
         nfs3_validate_strlen_or_goto (name, NFS_NAME_MAX, nfs3err, stat, ret);
         nfs3_map_fh_to_volume (nfs3, dirfh, req, vol, stat, nfs3err);
-        nfs3_check_rw_volaccess (nfs3, dirfh->xlatorid, stat, nfs3err);
+        nfs3_check_rw_volaccess (nfs3, dirfh->exportid, stat, nfs3err);
         nfs3_handle_call_state_init (nfs3, cs, req, vol, stat, nfs3err);
 
         cs->parent = *dirfh;
@@ -2481,8 +2664,11 @@ nfs3_symlink_reply (rpcsvc_request_t *req, nfsstat3 stat, struct nfs3_fh *fh,
                     struct iatt *postparent)
 {
         symlink3res     res = {0, };
+        uint64_t        deviceid = 0;
 
-        nfs3_fill_symlink3res (&res, stat, fh, buf, preparent, postparent);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_symlink3res (&res, stat, fh, buf, preparent, postparent,
+                               deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer)xdr_serialize_symlink3res);
 
@@ -2570,7 +2756,7 @@ nfs3_symlink (rpcsvc_request_t *req, struct nfs3_fh *dirfh, char *name,
         nfs3_validate_nfs3_state (req, nfs3, stat, nfs3err, ret);
         nfs3_validate_strlen_or_goto (name, NFS_NAME_MAX, nfs3err, stat, ret);
         nfs3_map_fh_to_volume (nfs3, dirfh, req, vol, stat, nfs3err);
-        nfs3_check_rw_volaccess (nfs3, dirfh->xlatorid, stat, nfs3err);
+        nfs3_check_rw_volaccess (nfs3, dirfh->exportid, stat, nfs3err);
         nfs3_handle_call_state_init (nfs3, cs, req, vol, stat, nfs3err);
 
         cs->parent = *dirfh;
@@ -2638,7 +2824,11 @@ nfs3_mknod_reply (rpcsvc_request_t *req, nfsstat3 stat, struct nfs3_fh *fh,
                   struct iatt *postparent)
 {
         mknod3res       res = {0, };
-        nfs3_fill_mknod3res (&res, stat, fh, buf, preparent, postparent);
+        uint64_t        deviceid = 0;
+
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_mknod3res (&res, stat, fh, buf, preparent, postparent,
+                             deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer)xdr_serialize_mknod3res);
 
@@ -2838,7 +3028,7 @@ nfs3_mknod (rpcsvc_request_t *req, struct nfs3_fh *fh, char *name,
         nfs3_validate_nfs3_state (req, nfs3, stat, nfs3err, ret);
         nfs3_validate_strlen_or_goto (name, NFS_NAME_MAX, nfs3err, stat, ret);
         nfs3_map_fh_to_volume (nfs3, fh, req, vol, stat, nfs3err);
-        nfs3_check_rw_volaccess (nfs3, fh->xlatorid, stat, nfs3err);
+        nfs3_check_rw_volaccess (nfs3, fh->exportid, stat, nfs3err);
         nfs3_handle_call_state_init (nfs3, cs, req, vol, stat, nfs3err);
 
         cs->mknodtype = nodedata->type;
@@ -2915,10 +3105,10 @@ nfs3_remove_reply (rpcsvc_request_t *req, nfsstat3 stat, struct iatt *preparent
                    , struct iatt *postparent)
 {
         remove3res      res = {0, };
-        uint16_t        xlid = 0;
+        uint64_t        deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
-        nfs3_fill_remove3res (&res, stat, preparent, postparent, xlid);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_remove3res (&res, stat, preparent, postparent, deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer)xdr_serialize_remove3res);
         return 0;
@@ -3037,7 +3227,7 @@ nfs3_remove (rpcsvc_request_t *req, struct nfs3_fh *fh, char *name)
         nfs3_validate_nfs3_state (req, nfs3, stat, nfs3err, ret);
         nfs3_validate_strlen_or_goto (name, NFS_NAME_MAX, nfs3err, stat, ret);
         nfs3_map_fh_to_volume (nfs3, fh, req, vol, stat, nfs3err);
-        nfs3_check_rw_volaccess (nfs3, fh->xlatorid, stat, nfs3err);
+        nfs3_check_rw_volaccess (nfs3, fh->exportid, stat, nfs3err);
         nfs3_handle_call_state_init (nfs3, cs, req, vol, stat, nfs3err);
 
         ret = nfs3_fh_resolve_and_resume (cs, fh, name, nfs3_remove_resume);
@@ -3094,10 +3284,10 @@ nfs3_rmdir_reply (rpcsvc_request_t *req, nfsstat3 stat, struct iatt *preparent,
                   struct iatt *postparent)
 {
         rmdir3res       res = {0, };
-        uint16_t        xlid = 0;
+        uint64_t        deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
-        nfs3_fill_rmdir3res (&res, stat, preparent, postparent, xlid);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_rmdir3res (&res, stat, preparent, postparent, deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer)xdr_serialize_rmdir3res);
         return 0;
@@ -3180,7 +3370,7 @@ nfs3_rmdir (rpcsvc_request_t *req, struct nfs3_fh *fh, char *name)
         nfs3_validate_nfs3_state (req, nfs3, stat, nfs3err, ret);
         nfs3_validate_strlen_or_goto (name, NFS_NAME_MAX, nfs3err, stat, ret);
         nfs3_map_fh_to_volume (nfs3, fh, req, vol, stat, nfs3err);
-        nfs3_check_rw_volaccess (nfs3, fh->xlatorid, stat, nfs3err);
+        nfs3_check_rw_volaccess (nfs3, fh->exportid, stat, nfs3err);
         nfs3_handle_call_state_init (nfs3, cs, req, vol, stat, nfs3err);
 
         ret = nfs3_fh_resolve_and_resume (cs, fh, name, nfs3_rmdir_resume);
@@ -3238,11 +3428,11 @@ nfs3_rename_reply (rpcsvc_request_t *req, nfsstat3 stat, struct iatt *buf,
                    struct iatt *prenewparent, struct iatt *postnewparent)
 {
         rename3res      res = {0, };
-        uint16_t        xlid = 0;
+        uint64_t        deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
+        deviceid = nfs3_request_xlator_deviceid (req);
         nfs3_fill_rename3res (&res, stat, buf, preoldparent, postoldparent,
-                              prenewparent, postnewparent, xlid);
+                              prenewparent, postnewparent, deviceid);
 
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer) xdr_serialize_rename3res);
@@ -3383,7 +3573,7 @@ nfs3_rename (rpcsvc_request_t *req, struct nfs3_fh *olddirfh, char *oldname,
         nfs3_validate_strlen_or_goto(oldname, NFS_NAME_MAX, nfs3err, stat, ret);
         nfs3_validate_strlen_or_goto(newname, NFS_NAME_MAX, nfs3err, stat, ret);
         nfs3_map_fh_to_volume (nfs3, olddirfh, req, vol, stat, nfs3err);
-        nfs3_check_rw_volaccess (nfs3, olddirfh->xlatorid, stat, nfs3err);
+        nfs3_check_rw_volaccess (nfs3, olddirfh->exportid, stat, nfs3err);
         nfs3_handle_call_state_init (nfs3, cs, req, vol, stat, nfs3err);
 
         /* While we resolve the source (fh, name) pair, we need to keep a copy
@@ -3454,10 +3644,10 @@ nfs3_link_reply (rpcsvc_request_t *req, nfsstat3 stat, struct iatt *buf,
                  struct iatt *preparent, struct iatt *postparent)
 {
         link3res        res = {0, };
-        uint16_t        xlid = 0;
+        uint64_t        deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
-        nfs3_fill_link3res (&res, stat, buf, preparent, postparent, xlid);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_link3res (&res, stat, buf, preparent, postparent, deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer)xdr_serialize_link3res);
 
@@ -3572,7 +3762,7 @@ nfs3_link (rpcsvc_request_t *req, struct nfs3_fh *targetfh,
         nfs3_validate_nfs3_state (req, nfs3, stat, nfs3err, ret);
         nfs3_validate_strlen_or_goto(newname, NFS_NAME_MAX, nfs3err, stat, ret);
         nfs3_map_fh_to_volume (nfs3, dirfh, req, vol, stat, nfs3err);
-        nfs3_check_rw_volaccess (nfs3, dirfh->xlatorid, stat, nfs3err);
+        nfs3_check_rw_volaccess (nfs3, dirfh->exportid, stat, nfs3err);
         nfs3_handle_call_state_init (nfs3, cs, req, vol, stat, nfs3err);
 
         cs->fh = *dirfh;
@@ -3638,10 +3828,12 @@ nfs3_readdirp_reply (rpcsvc_request_t *req, nfsstat3 stat,struct nfs3_fh *dirfh,
                      uint64_t cverf, struct iatt *dirstat, gf_dirent_t *entries,
                      count3 dircount, count3 maxcount, int is_eof)
 {
-        readdirp3res     res = {0, };
+        readdirp3res    res = {0, };
+        uint64_t        deviceid = 0;
 
+        deviceid = nfs3_request_xlator_deviceid (req);
         nfs3_fill_readdirp3res (&res, stat, dirfh, cverf, dirstat, entries,
-                                dircount, maxcount, is_eof);
+                                dircount, maxcount, is_eof, deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer) xdr_serialize_readdirp3res);
         nfs3_free_readdirp3res (&res);
@@ -3656,9 +3848,11 @@ nfs3_readdir_reply (rpcsvc_request_t *req, nfsstat3 stat, struct nfs3_fh *dirfh,
                     count3 count, int is_eof)
 {
         readdir3res     res = {0, };
+        uint64_t        deviceid = 0;
 
+        deviceid = nfs3_request_xlator_deviceid (req);
         nfs3_fill_readdir3res (&res, stat, dirfh, cverf, dirstat, entries, count
-                               , is_eof);
+                               , is_eof, deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer) xdr_serialize_readdir3res);
         nfs3_free_readdir3res (&res);
@@ -3987,10 +4181,10 @@ nfs3_fsstat_reply (rpcsvc_request_t *req, nfsstat3 stat, struct statvfs *fsbuf,
                    struct iatt *postbuf)
 {
         fsstat3res      res = {0, };
-        uint16_t        xlid = 0;
+        uint64_t        deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
-        nfs3_fill_fsstat3res (&res, stat, fsbuf, postbuf, xlid);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_fsstat3res (&res, stat, fsbuf, postbuf, deviceid);
         return nfs3svc_submit_reply (req, &res,
                                      (nfs3_serializer)xdr_serialize_fsstat3res);
 
@@ -4162,11 +4356,11 @@ nfs3_fsinfo_reply (rpcsvc_request_t *req, nfsstat3 status, struct iatt *fsroot)
 {
         fsinfo3res              res;
         struct nfs3_state       *nfs3 = NULL;
-        uint16_t                xlid = 0;
+        uint64_t                deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
+        deviceid = nfs3_request_xlator_deviceid (req);
         nfs3 = nfs_rpcsvc_request_program_private (req);
-        nfs3_fill_fsinfo3res (nfs3, &res, status, fsroot, xlid);
+        nfs3_fill_fsinfo3res (nfs3, &res, status, fsroot, deviceid);
 
         nfs3svc_submit_reply (req, &res,
                               (nfs3_serializer)xdr_serialize_fsinfo3res);
@@ -4301,10 +4495,10 @@ int
 nfs3_pathconf_reply (rpcsvc_request_t *req, nfsstat3 stat, struct iatt *buf)
 {
         pathconf3res    res = {0, };
-        uint16_t        xlid = 0;
+        uint64_t        deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
-        nfs3_fill_pathconf3res (&res, stat, buf, xlid);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_pathconf3res (&res, stat, buf, deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer)xdr_serialize_pathconf3res);
         return 0;
@@ -4440,10 +4634,10 @@ nfs3_commit_reply (rpcsvc_request_t *req, nfsstat3 stat, uint64_t wverf,
                    struct iatt *prestat, struct iatt *poststat)
 {
         commit3res      res = {0, };
-        uint16_t        xlid = 0;
+        uint64_t        deviceid = 0;
 
-        xlid = nfs3_request_xlator_id (req);
-        nfs3_fill_commit3res (&res, stat, wverf, prestat, poststat, xlid);
+        deviceid = nfs3_request_xlator_deviceid (req);
+        nfs3_fill_commit3res (&res, stat, wverf, prestat, poststat, deviceid);
         nfs3svc_submit_reply (req, (void *)&res,
                               (nfs3_serializer)xdr_serialize_commit3res);
 
@@ -4489,7 +4683,7 @@ nfs3_commit_resume (void *carg)
         cs = (nfs3_call_state_t *)carg;
         nfs3_check_fh_resolve_status (cs, stat, nfs3err);
 
-        if (nfs3_export_sync_trusted (cs->nfs3state, cs->resolvefh.xlatorid)) {
+        if (nfs3_export_sync_trusted (cs->nfs3state, cs->resolvefh.exportid)) {
                 ret = -1;
                 stat = NFS3_OK;
                 goto nfs3err;
@@ -4564,7 +4758,7 @@ nfs3_commit (rpcsvc_request_t *req, struct nfs3_fh *fh, offset3 offset,
         nfs3_validate_gluster_fh (fh, stat, nfs3err);
         nfs3_validate_nfs3_state (req, nfs3, stat, nfs3err, ret);
         nfs3_map_fh_to_volume (nfs3, fh, req, vol, stat, nfs3err);
-        nfs3_check_rw_volaccess (nfs3, fh->xlatorid, stat, nfs3err);
+        nfs3_check_rw_volaccess (nfs3, fh->exportid, stat, nfs3err);
         nfs3_handle_call_state_init (nfs3, cs, req, vol, stat, nfs3err);
 
         cs->datacount = count;
@@ -4753,18 +4947,60 @@ err:
         return ret;
 }
 
+
 int
-nfs3_init_subvolume_options (struct nfs3_export *exp, dict_t *options)
+nfs3_init_subvolume_options (struct nfs3_state *nfs3, struct nfs3_export *exp)
 {
         int             ret = -1;
         char            *optstr = NULL;
         char            searchkey[1024];
         char            *name = NULL;
         gf_boolean_t    boolt = _gf_false;
+        uuid_t          volumeid = {0, };
+        dict_t          *options = NULL;
 
-        if ((!exp) || (!options))
+        if ((!exp) || (!nfs3))
                 return -1;
 
+        options = nfs3->nfsx->options;
+        uuid_clear (volumeid);
+        if (gf_nfs_dvm_off (nfs_state (nfs3->nfsx)))
+                goto no_dvm;
+
+        ret = snprintf (searchkey, 1024, "nfs3.%s.volume-id",exp->subvol->name);
+        if (ret < 0) {
+                gf_log (GF_MNT, GF_LOG_ERROR, "snprintf failed");
+                ret = -1;
+                goto err;
+        }
+
+        if (dict_get (options, searchkey)) {
+                ret = dict_get_str (options, searchkey, &optstr);
+                if (ret < 0) {
+                        gf_log (GF_MNT, GF_LOG_ERROR, "Failed to read option"
+                                ": %s", searchkey);
+                        ret = -1;
+                        goto err;
+                }
+        } else {
+                gf_log (GF_MNT, GF_LOG_ERROR, "DVM is on but volume-id not "
+                        "given for volume: %s", exp->subvol->name);
+                ret = -1;
+                goto err;
+        }
+
+        if (optstr) {
+                ret = uuid_parse (optstr, volumeid);
+                if (ret < 0) {
+                        gf_log (GF_MNT, GF_LOG_ERROR, "Failed to parse volume "
+                                "UUID");
+                        ret = -1;
+                        goto err;
+                }
+                uuid_copy (exp->volumeid, volumeid);
+        }
+
+no_dvm:
         /* Volume Access */
         name = exp->subvol->name;
         ret = snprintf (searchkey, 1024, "nfs3.%s.volume-access", name);
@@ -4880,64 +5116,58 @@ err:
 }
 
 
-int
-nfs3_init_subvolume (struct nfs3_state *nfs3, xlator_t *nfsx, xlator_t *subvol,
-                     int xlid)
+struct nfs3_export *
+nfs3_init_subvolume (struct nfs3_state *nfs3, xlator_t *subvol)
 {
         int                     ret = -1;
         struct nfs3_export      *exp = NULL;
 
-        if ((!nfs3) || (!nfsx) || (!subvol))
-                return -1;
+        if ((!nfs3) || (!subvol))
+                return NULL;
 
-        exp = &nfs3->exports[xlid];
+        exp = GF_CALLOC (1, sizeof (*exp), gf_nfs_mt_nfs3_export);
         exp->subvol = subvol;
-
+        INIT_LIST_HEAD (&exp->explist);
         gf_log (GF_NFS3, GF_LOG_TRACE, "Initing state: %s", exp->subvol->name);
 
-        ret = nfs3_init_subvolume_options (exp, nfsx->options);
-        if (ret == -1)
+        ret = nfs3_init_subvolume_options (nfs3, exp);
+        if (ret == -1) {
                 gf_log (GF_NFS3, GF_LOG_ERROR, "Failed to init subvol");
+                goto exp_free;
+        }
 
-        return ret;
+        ret = 0;
+exp_free:
+        if (ret < 0) {
+                GF_FREE (exp);
+                exp = NULL;
+        }
+
+        return exp;
 }
 
 
 int
-nfs3_init_subvolumes (struct nfs3_state *nfs3, xlator_t *nfsx)
+nfs3_init_subvolumes (struct nfs3_state *nfs3)
 {
-        int                     xl_count = 0;
         int                     ret = -1;
         struct xlator_list      *xl_list = NULL;
+        struct nfs3_export      *exp = NULL;
 
-        if ((!nfs3) || (!nfsx))
+        if (!nfs3)
                 return -1;
 
-        xl_list = nfsx->children;
-        while (xl_list) {
-                ++xl_count;
-                xl_list = xl_list->next;
-        }
+        xl_list = nfs3->nfsx->children;
 
-        nfs3->exports = GF_CALLOC (xl_count, sizeof (struct nfs3_export),
-                                   gf_nfs_mt_nfs3_export);
-        if (!nfs3->exports) {
-                gf_log (GF_NFS3, GF_LOG_ERROR, "Memory allocation failed");
-                goto err;
-        }
-
-        xl_list = nfsx->children;
-        xl_count = 0;           /* Re-using xl_count. */
         while (xl_list) {
-                ret = nfs3_init_subvolume (nfs3, nfsx, xl_list->xlator,
-                                           xl_count);
-                if (ret == -1) {
+                exp = nfs3_init_subvolume (nfs3, xl_list->xlator);
+                if (!exp) {
                         gf_log (GF_NFS3, GF_LOG_ERROR, "Failed to init subvol: "
                                 "%s", xl_list->xlator->name);
                         goto err;
                 }
+                list_add_tail (&exp->explist, &nfs3->exports);
                 xl_list = xl_list->next;
-                ++xl_count;
         }
 
         ret = 0;
@@ -4983,7 +5213,8 @@ nfs3_init_state (xlator_t *nfsx)
 
         nfs3->nfsx = nfsx;
         nfs3->exportslist = nfsx->children;
-        ret = nfs3_init_subvolumes (nfs3, nfsx);
+        INIT_LIST_HEAD (&nfs3->exports);
+        ret = nfs3_init_subvolumes (nfs3);
         if (ret == -1) {
                 gf_log (GF_NFS3, GF_LOG_ERROR, "Failed to init per-subvolume "
                         "state");
diff --git a/xlators/nfs/server/src/nfs3.h b/xlators/nfs/server/src/nfs3.h
index 1565f26345b..f7683eaa789 100644
--- a/xlators/nfs/server/src/nfs3.h
+++ b/xlators/nfs/server/src/nfs3.h
@@ -82,7 +82,9 @@ struct nfs3_fd_entry {
 
 /* Per subvolume nfs3 specific state */
 struct nfs3_export {
+        struct list_head        explist;
         xlator_t                *subvol;
+        uuid_t                  volumeid;
         int                     access;
         int                     trusted_sync;
         int                     trusted_write;
@@ -108,7 +110,7 @@ struct nfs3_state {
          */
         xlator_list_t           *exportslist;
 
-        struct nfs3_export      *exports;
+        struct list_head        exports;
         /* Mempool for allocations of struct nfs3_local */
         struct mem_pool         *localpool;