core: adding extra data for fops

with this change, the xlator APIs will have a dictionary as extra
argument, which is passed between all the layers. This can be
utilized for overloading in some of the operations.

Change-Id: I58a8186b3ef647650280e63f3e5e9b9de7827b40
Signed-off-by: Amar Tumballi <amarts@redhat.com>
BUG: 782265
Reviewed-on: http://review.gluster.com/2960
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

7 files changed, 1178 insertions, 912 deletions

diff --git a/libglusterfs/src/call-stub.c b/libglusterfs/src/call-stub.c
index 9b3a9c34849..01e919d6943 100644
--- a/libglusterfs/src/call-stub.c
+++ b/libglusterfs/src/call-stub.c
@@ -55,7 +55,7 @@ call_stub_t *
 fop_lookup_stub (call_frame_t *frame,
                  fop_lookup_t fn,
                  loc_t *loc,
-                 dict_t *xattr_req)
+                 dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -67,10 +67,10 @@ fop_lookup_stub (call_frame_t *frame,
 
         stub->args.lookup.fn = fn;
 
-        if (xattr_req)
-                stub->args.lookup.xattr_req = dict_ref (xattr_req);
-
         loc_copy (&stub->args.lookup.loc, loc);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -83,7 +83,7 @@ fop_lookup_cbk_stub (call_frame_t *frame,
                      int32_t op_errno,
                      inode_t *inode,
                      struct iatt *buf,
-                     dict_t *dict,
+                     dict_t *xdata,
                      struct iatt *postparent)
 {
         call_stub_t *stub = NULL;
@@ -100,10 +100,11 @@ fop_lookup_cbk_stub (call_frame_t *frame,
                 stub->args.lookup_cbk.inode = inode_ref (inode);
         if (buf)
                 stub->args.lookup_cbk.buf = *buf;
-        if (dict)
-                stub->args.lookup_cbk.dict = dict_ref (dict);
         if (postparent)
                 stub->args.lookup_cbk.postparent = *postparent;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -113,7 +114,7 @@ out:
 call_stub_t *
 fop_stat_stub (call_frame_t *frame,
                fop_stat_t fn,
-               loc_t *loc)
+               loc_t *loc, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -125,6 +126,9 @@ fop_stat_stub (call_frame_t *frame,
 
         stub->args.stat.fn = fn;
         loc_copy (&stub->args.stat.loc, loc);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -135,7 +139,7 @@ fop_stat_cbk_stub (call_frame_t *frame,
                    fop_stat_cbk_t fn,
                    int32_t op_ret,
                    int32_t op_errno,
-                   struct iatt *buf)
+                   struct iatt *buf, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -149,6 +153,9 @@ fop_stat_cbk_stub (call_frame_t *frame,
         stub->args.stat_cbk.op_errno = op_errno;
         if (op_ret == 0)
                 stub->args.stat_cbk.buf = *buf;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -157,7 +164,7 @@ out:
 call_stub_t *
 fop_fstat_stub (call_frame_t *frame,
                 fop_fstat_t fn,
-                fd_t *fd)
+                fd_t *fd, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -170,6 +177,9 @@ fop_fstat_stub (call_frame_t *frame,
 
         if (fd)
                 stub->args.fstat.fd = fd_ref (fd);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -180,7 +190,7 @@ fop_fstat_cbk_stub (call_frame_t *frame,
                     fop_fstat_cbk_t fn,
                     int32_t op_ret,
                     int32_t op_errno,
-                    struct iatt *buf)
+                    struct iatt *buf, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -194,6 +204,9 @@ fop_fstat_cbk_stub (call_frame_t *frame,
         stub->args.fstat_cbk.op_errno = op_errno;
         if (buf)
                 stub->args.fstat_cbk.buf = *buf;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -205,7 +218,7 @@ call_stub_t *
 fop_truncate_stub (call_frame_t *frame,
                    fop_truncate_t fn,
                    loc_t *loc,
-                   off_t off)
+                   off_t off, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -218,6 +231,9 @@ fop_truncate_stub (call_frame_t *frame,
         stub->args.truncate.fn = fn;
         loc_copy (&stub->args.truncate.loc, loc);
         stub->args.truncate.off = off;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -229,7 +245,7 @@ fop_truncate_cbk_stub (call_frame_t *frame,
                        int32_t op_ret,
                        int32_t op_errno,
                        struct iatt *prebuf,
-                       struct iatt *postbuf)
+                       struct iatt *postbuf, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -245,6 +261,9 @@ fop_truncate_cbk_stub (call_frame_t *frame,
                 stub->args.truncate_cbk.prebuf = *prebuf;
         if (postbuf)
                 stub->args.truncate_cbk.postbuf = *postbuf;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -254,7 +273,7 @@ call_stub_t *
 fop_ftruncate_stub (call_frame_t *frame,
                     fop_ftruncate_t fn,
                     fd_t *fd,
-                    off_t off)
+                    off_t off, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -268,6 +287,9 @@ fop_ftruncate_stub (call_frame_t *frame,
                 stub->args.ftruncate.fd = fd_ref (fd);
 
         stub->args.ftruncate.off = off;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -279,7 +301,7 @@ fop_ftruncate_cbk_stub (call_frame_t *frame,
                         int32_t op_ret,
                         int32_t op_errno,
                         struct iatt *prebuf,
-                        struct iatt *postbuf)
+                        struct iatt *postbuf, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -295,6 +317,9 @@ fop_ftruncate_cbk_stub (call_frame_t *frame,
                 stub->args.ftruncate_cbk.prebuf = *prebuf;
         if (postbuf)
                 stub->args.ftruncate_cbk.postbuf = *postbuf;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -304,7 +329,7 @@ call_stub_t *
 fop_access_stub (call_frame_t *frame,
                  fop_access_t fn,
                  loc_t *loc,
-                 int32_t mask)
+                 int32_t mask, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -317,6 +342,9 @@ fop_access_stub (call_frame_t *frame,
         stub->args.access.fn = fn;
         loc_copy (&stub->args.access.loc, loc);
         stub->args.access.mask = mask;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -326,7 +354,7 @@ call_stub_t *
 fop_access_cbk_stub (call_frame_t *frame,
                      fop_access_cbk_t fn,
                      int32_t op_ret,
-                     int32_t op_errno)
+                     int32_t op_errno, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -338,6 +366,9 @@ fop_access_cbk_stub (call_frame_t *frame,
         stub->args.access_cbk.fn = fn;
         stub->args.access_cbk.op_ret = op_ret;
         stub->args.access_cbk.op_errno = op_errno;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -347,7 +378,7 @@ call_stub_t *
 fop_readlink_stub (call_frame_t *frame,
                    fop_readlink_t fn,
                    loc_t *loc,
-                   size_t size)
+                   size_t size, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -360,6 +391,9 @@ fop_readlink_stub (call_frame_t *frame,
         stub->args.readlink.fn = fn;
         loc_copy (&stub->args.readlink.loc, loc);
         stub->args.readlink.size = size;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -371,7 +405,7 @@ fop_readlink_cbk_stub (call_frame_t *frame,
                        int32_t op_ret,
                        int32_t op_errno,
                        const char *path,
-                       struct iatt *sbuf)
+                       struct iatt *sbuf, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -387,14 +421,17 @@ fop_readlink_cbk_stub (call_frame_t *frame,
                 stub->args.readlink_cbk.buf = gf_strdup (path);
         if (sbuf)
                 stub->args.readlink_cbk.sbuf = *sbuf;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
 
 
 call_stub_t *
-fop_mknod_stub (call_frame_t *frame, fop_mknod_t fn,
-                loc_t *loc, mode_t mode, dev_t rdev, dict_t *params)
+fop_mknod_stub (call_frame_t *frame, fop_mknod_t fn, loc_t *loc, mode_t mode,
+                dev_t rdev, mode_t umask, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -408,8 +445,10 @@ fop_mknod_stub (call_frame_t *frame, fop_mknod_t fn,
         loc_copy (&stub->args.mknod.loc, loc);
         stub->args.mknod.mode = mode;
         stub->args.mknod.rdev = rdev;
-        if (params)
-                stub->args.mknod.params = dict_ref (params);
+        stub->args.mknod.umask = umask;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -423,7 +462,7 @@ fop_mknod_cbk_stub (call_frame_t *frame,
                     inode_t *inode,
                     struct iatt *buf,
                     struct iatt *preparent,
-                    struct iatt *postparent)
+                    struct iatt *postparent, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -443,6 +482,9 @@ fop_mknod_cbk_stub (call_frame_t *frame,
                 stub->args.mknod_cbk.preparent = *preparent;
         if (postparent)
                 stub->args.mknod_cbk.postparent = *postparent;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -450,7 +492,7 @@ out:
 
 call_stub_t *
 fop_mkdir_stub (call_frame_t *frame, fop_mkdir_t fn,
-                loc_t *loc, mode_t mode, dict_t *params)
+                loc_t *loc, mode_t mode, mode_t umask, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -462,9 +504,12 @@ fop_mkdir_stub (call_frame_t *frame, fop_mkdir_t fn,
 
         stub->args.mkdir.fn = fn;
         loc_copy (&stub->args.mkdir.loc, loc);
-        stub->args.mkdir.mode = mode;
-        if (params)
-                stub->args.mkdir.params = dict_ref (params);
+        stub->args.mkdir.mode  = mode;
+        stub->args.mkdir.umask = umask;
+
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -478,7 +523,7 @@ fop_mkdir_cbk_stub (call_frame_t *frame,
                     inode_t *inode,
                     struct iatt *buf,
                     struct iatt *preparent,
-                    struct iatt *postparent)
+                    struct iatt *postparent, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -498,6 +543,9 @@ fop_mkdir_cbk_stub (call_frame_t *frame,
                 stub->args.mkdir_cbk.preparent = *preparent;
         if (postparent)
                 stub->args.mkdir_cbk.postparent = *postparent;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -506,7 +554,7 @@ out:
 call_stub_t *
 fop_unlink_stub (call_frame_t *frame,
                  fop_unlink_t fn,
-                 loc_t *loc)
+                 loc_t *loc, int xflag, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -518,6 +566,10 @@ fop_unlink_stub (call_frame_t *frame,
 
         stub->args.unlink.fn = fn;
         loc_copy (&stub->args.unlink.loc, loc);
+        stub->args.unlink.xflag = xflag;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -529,7 +581,7 @@ fop_unlink_cbk_stub (call_frame_t *frame,
                      int32_t op_ret,
                      int32_t op_errno,
                      struct iatt *preparent,
-                     struct iatt *postparent)
+                     struct iatt *postparent, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -545,6 +597,9 @@ fop_unlink_cbk_stub (call_frame_t *frame,
                 stub->args.unlink_cbk.preparent = *preparent;
         if (postparent)
                 stub->args.unlink_cbk.postparent = *postparent;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -553,7 +608,7 @@ out:
 
 call_stub_t *
 fop_rmdir_stub (call_frame_t *frame, fop_rmdir_t fn,
-                loc_t *loc, int flags)
+                loc_t *loc, int flags, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -566,6 +621,9 @@ fop_rmdir_stub (call_frame_t *frame, fop_rmdir_t fn,
         stub->args.rmdir.fn = fn;
         loc_copy (&stub->args.rmdir.loc, loc);
         stub->args.rmdir.flags = flags;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -577,7 +635,7 @@ fop_rmdir_cbk_stub (call_frame_t *frame,
                     int32_t op_ret,
                     int32_t op_errno,
                     struct iatt *preparent,
-                    struct iatt *postparent)
+                    struct iatt *postparent, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -593,6 +651,9 @@ fop_rmdir_cbk_stub (call_frame_t *frame,
                 stub->args.rmdir_cbk.preparent = *preparent;
         if (postparent)
                 stub->args.rmdir_cbk.postparent = *postparent;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -600,7 +661,7 @@ out:
 
 call_stub_t *
 fop_symlink_stub (call_frame_t *frame, fop_symlink_t fn,
-                  const char *linkname, loc_t *loc, dict_t *params)
+                  const char *linkname, loc_t *loc, mode_t umask, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -613,9 +674,11 @@ fop_symlink_stub (call_frame_t *frame, fop_symlink_t fn,
 
         stub->args.symlink.fn = fn;
         stub->args.symlink.linkname = gf_strdup (linkname);
+        stub->args.symlink.umask = umask;
         loc_copy (&stub->args.symlink.loc, loc);
-        if (params)
-                stub->args.symlink.params = dict_ref (params);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -629,7 +692,7 @@ fop_symlink_cbk_stub (call_frame_t *frame,
                       inode_t *inode,
                       struct iatt *buf,
                       struct iatt *preparent,
-                      struct iatt *postparent)
+                      struct iatt *postparent, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -649,6 +712,9 @@ fop_symlink_cbk_stub (call_frame_t *frame,
                 stub->args.symlink_cbk.preparent = *preparent;
         if (postparent)
                 stub->args.symlink_cbk.postparent = *postparent;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -658,7 +724,7 @@ call_stub_t *
 fop_rename_stub (call_frame_t *frame,
                  fop_rename_t fn,
                  loc_t *oldloc,
-                 loc_t *newloc)
+                 loc_t *newloc, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -672,6 +738,9 @@ fop_rename_stub (call_frame_t *frame,
         stub->args.rename.fn = fn;
         loc_copy (&stub->args.rename.old, oldloc);
         loc_copy (&stub->args.rename.new, newloc);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -686,7 +755,7 @@ fop_rename_cbk_stub (call_frame_t *frame,
                      struct iatt *preoldparent,
                      struct iatt *postoldparent,
                      struct iatt *prenewparent,
-                     struct iatt *postnewparent)
+                     struct iatt *postnewparent, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -708,6 +777,9 @@ fop_rename_cbk_stub (call_frame_t *frame,
                 stub->args.rename_cbk.prenewparent = *prenewparent;
         if (postnewparent)
                 stub->args.rename_cbk.postnewparent = *postnewparent;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -717,7 +789,7 @@ call_stub_t *
 fop_link_stub (call_frame_t *frame,
                fop_link_t fn,
                loc_t *oldloc,
-               loc_t *newloc)
+               loc_t *newloc, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -732,6 +804,9 @@ fop_link_stub (call_frame_t *frame,
         loc_copy (&stub->args.link.oldloc, oldloc);
         loc_copy (&stub->args.link.newloc, newloc);
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -745,7 +820,7 @@ fop_link_cbk_stub (call_frame_t *frame,
                    inode_t *inode,
                    struct iatt *buf,
                    struct iatt *preparent,
-                   struct iatt *postparent)
+                   struct iatt *postparent, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -765,6 +840,9 @@ fop_link_cbk_stub (call_frame_t *frame,
                 stub->args.link_cbk.preparent = *preparent;
         if (postparent)
                 stub->args.link_cbk.postparent = *postparent;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -773,7 +851,7 @@ out:
 call_stub_t *
 fop_create_stub (call_frame_t *frame, fop_create_t fn,
                  loc_t *loc, int32_t flags, mode_t mode,
-                 fd_t *fd, dict_t *params)
+                 mode_t umask, fd_t *fd, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -787,10 +865,12 @@ fop_create_stub (call_frame_t *frame, fop_create_t fn,
         loc_copy (&stub->args.create.loc, loc);
         stub->args.create.flags = flags;
         stub->args.create.mode = mode;
+        stub->args.create.umask = umask;
         if (fd)
                 stub->args.create.fd = fd_ref (fd);
-        if (params)
-                stub->args.create.params = dict_ref (params);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -805,7 +885,7 @@ fop_create_cbk_stub (call_frame_t *frame,
                      inode_t *inode,
                      struct iatt *buf,
                      struct iatt *preparent,
-                     struct iatt *postparent)
+                     struct iatt *postparent, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -827,6 +907,9 @@ fop_create_cbk_stub (call_frame_t *frame,
                 stub->args.create_cbk.preparent = *preparent;
         if (postparent)
                 stub->args.create_cbk.postparent = *postparent;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -837,7 +920,7 @@ fop_open_stub (call_frame_t *frame,
                fop_open_t fn,
                loc_t *loc,
                int32_t flags, fd_t *fd,
-               int32_t wbflags)
+               dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -850,9 +933,11 @@ fop_open_stub (call_frame_t *frame,
         stub->args.open.fn = fn;
         loc_copy (&stub->args.open.loc, loc);
         stub->args.open.flags = flags;
-        stub->args.open.wbflags = wbflags;
         if (fd)
                 stub->args.open.fd = fd_ref (fd);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -863,8 +948,7 @@ fop_open_cbk_stub (call_frame_t *frame,
                    fop_open_cbk_t fn,
                    int32_t op_ret,
                    int32_t op_errno,
-                   fd_t *fd)
-
+                   fd_t *fd, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -878,6 +962,9 @@ fop_open_cbk_stub (call_frame_t *frame,
         stub->args.open_cbk.op_errno = op_errno;
         if (fd)
                 stub->args.open_cbk.fd = fd_ref (fd);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -888,7 +975,7 @@ fop_readv_stub (call_frame_t *frame,
                 fop_readv_t fn,
                 fd_t *fd,
                 size_t size,
-                off_t off, uint32_t flags)
+                off_t off, uint32_t flags, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -904,6 +991,9 @@ fop_readv_stub (call_frame_t *frame,
         stub->args.readv.off   = off;
         stub->args.readv.flags = flags;
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -917,8 +1007,7 @@ fop_readv_cbk_stub (call_frame_t *frame,
                     struct iovec *vector,
                     int32_t count,
                     struct iatt *stbuf,
-                    struct iobref *iobref)
-
+                    struct iobref *iobref, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -936,6 +1025,9 @@ fop_readv_cbk_stub (call_frame_t *frame,
                 stub->args.readv_cbk.stbuf = *stbuf;
                 stub->args.readv_cbk.iobref = iobref_ref (iobref);
         }
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -948,7 +1040,7 @@ fop_writev_stub (call_frame_t *frame,
                  struct iovec *vector,
                  int32_t count,
                  off_t off, uint32_t flags,
-                 struct iobref *iobref)
+                 struct iobref *iobref, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -966,6 +1058,8 @@ fop_writev_stub (call_frame_t *frame,
         stub->args.writev.off    = off;
         stub->args.writev.flags  = flags;
         stub->args.writev.iobref = iobref_ref (iobref);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
 
 out:
         return stub;
@@ -978,8 +1072,7 @@ fop_writev_cbk_stub (call_frame_t *frame,
                      int32_t op_ret,
                      int32_t op_errno,
                      struct iatt *prebuf,
-                     struct iatt *postbuf)
-
+                     struct iatt *postbuf, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -995,6 +1088,9 @@ fop_writev_cbk_stub (call_frame_t *frame,
                 stub->args.writev_cbk.postbuf = *postbuf;
         if (prebuf)
                 stub->args.writev_cbk.prebuf = *prebuf;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1004,7 +1100,7 @@ out:
 call_stub_t *
 fop_flush_stub (call_frame_t *frame,
                 fop_flush_t fn,
-                fd_t *fd)
+                fd_t *fd, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1016,6 +1112,9 @@ fop_flush_stub (call_frame_t *frame,
         stub->args.flush.fn = fn;
         if (fd)
                 stub->args.flush.fd = fd_ref (fd);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1025,8 +1124,7 @@ call_stub_t *
 fop_flush_cbk_stub (call_frame_t *frame,
                     fop_flush_cbk_t fn,
                     int32_t op_ret,
-                    int32_t op_errno)
-
+                    int32_t op_errno, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1038,6 +1136,9 @@ fop_flush_cbk_stub (call_frame_t *frame,
         stub->args.flush_cbk.fn = fn;
         stub->args.flush_cbk.op_ret = op_ret;
         stub->args.flush_cbk.op_errno = op_errno;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1049,7 +1150,7 @@ call_stub_t *
 fop_fsync_stub (call_frame_t *frame,
                 fop_fsync_t fn,
                 fd_t *fd,
-                int32_t datasync)
+                int32_t datasync, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1062,6 +1163,9 @@ fop_fsync_stub (call_frame_t *frame,
         if (fd)
                 stub->args.fsync.fd = fd_ref (fd);
         stub->args.fsync.datasync = datasync;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1073,7 +1177,7 @@ fop_fsync_cbk_stub (call_frame_t *frame,
                     int32_t op_ret,
                     int32_t op_errno,
                     struct iatt *prebuf,
-                    struct iatt *postbuf)
+                    struct iatt *postbuf, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1089,6 +1193,9 @@ fop_fsync_cbk_stub (call_frame_t *frame,
                 stub->args.fsync_cbk.prebuf = *prebuf;
         if (postbuf)
                 stub->args.fsync_cbk.postbuf = *postbuf;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1097,7 +1204,7 @@ out:
 call_stub_t *
 fop_opendir_stub (call_frame_t *frame,
                   fop_opendir_t fn,
-                  loc_t *loc, fd_t *fd)
+                  loc_t *loc, fd_t *fd, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1111,6 +1218,9 @@ fop_opendir_stub (call_frame_t *frame,
         loc_copy (&stub->args.opendir.loc, loc);
         if (fd)
                 stub->args.opendir.fd = fd_ref (fd);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1121,8 +1231,7 @@ fop_opendir_cbk_stub (call_frame_t *frame,
                       fop_opendir_cbk_t fn,
                       int32_t op_ret,
                       int32_t op_errno,
-                      fd_t *fd)
-
+                      fd_t *fd, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1137,6 +1246,9 @@ fop_opendir_cbk_stub (call_frame_t *frame,
 
         if (fd)
                 stub->args.opendir_cbk.fd = fd_ref (fd);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1146,7 +1258,7 @@ call_stub_t *
 fop_fsyncdir_stub (call_frame_t *frame,
                    fop_fsyncdir_t fn,
                    fd_t *fd,
-                   int32_t datasync)
+                   int32_t datasync, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1159,6 +1271,9 @@ fop_fsyncdir_stub (call_frame_t *frame,
         if (fd)
                 stub->args.fsyncdir.fd = fd_ref (fd);
         stub->args.fsyncdir.datasync = datasync;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1168,8 +1283,7 @@ call_stub_t *
 fop_fsyncdir_cbk_stub (call_frame_t *frame,
                        fop_fsyncdir_cbk_t fn,
                        int32_t op_ret,
-                       int32_t op_errno)
-
+                       int32_t op_errno, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1181,6 +1295,9 @@ fop_fsyncdir_cbk_stub (call_frame_t *frame,
         stub->args.fsyncdir_cbk.fn = fn;
         stub->args.fsyncdir_cbk.op_ret = op_ret;
         stub->args.fsyncdir_cbk.op_errno = op_errno;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1189,7 +1306,7 @@ out:
 call_stub_t *
 fop_statfs_stub (call_frame_t *frame,
                  fop_statfs_t fn,
-                 loc_t *loc)
+                 loc_t *loc, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1201,6 +1318,9 @@ fop_statfs_stub (call_frame_t *frame,
 
         stub->args.statfs.fn = fn;
         loc_copy (&stub->args.statfs.loc, loc);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1211,8 +1331,7 @@ fop_statfs_cbk_stub (call_frame_t *frame,
                      fop_statfs_cbk_t fn,
                      int32_t op_ret,
                      int32_t op_errno,
-                     struct statvfs *buf)
-
+                     struct statvfs *buf, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1226,6 +1345,9 @@ fop_statfs_cbk_stub (call_frame_t *frame,
         stub->args.statfs_cbk.op_errno = op_errno;
         if (op_ret == 0)
                 stub->args.statfs_cbk.buf = *buf;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1236,7 +1358,7 @@ fop_setxattr_stub (call_frame_t *frame,
                    fop_setxattr_t fn,
                    loc_t *loc,
                    dict_t *dict,
-                   int32_t flags)
+                   int32_t flags, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1252,6 +1374,9 @@ fop_setxattr_stub (call_frame_t *frame,
         if (dict)
                 stub->args.setxattr.dict = dict_ref (dict);
         stub->args.setxattr.flags = flags;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1261,7 +1386,7 @@ call_stub_t *
 fop_setxattr_cbk_stub (call_frame_t *frame,
                        fop_setxattr_cbk_t fn,
                        int32_t op_ret,
-                       int32_t op_errno)
+                       int32_t op_errno, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1273,6 +1398,9 @@ fop_setxattr_cbk_stub (call_frame_t *frame,
         stub->args.setxattr_cbk.fn = fn;
         stub->args.setxattr_cbk.op_ret = op_ret;
         stub->args.setxattr_cbk.op_errno = op_errno;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1281,7 +1409,7 @@ call_stub_t *
 fop_getxattr_stub (call_frame_t *frame,
                    fop_getxattr_t fn,
                    loc_t *loc,
-                   const char *name)
+                   const char *name, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1296,6 +1424,9 @@ fop_getxattr_stub (call_frame_t *frame,
 
         if (name)
                 stub->args.getxattr.name = gf_strdup (name);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1306,7 +1437,7 @@ fop_getxattr_cbk_stub (call_frame_t *frame,
                        fop_getxattr_cbk_t fn,
                        int32_t op_ret,
                        int32_t op_errno,
-                       dict_t *dict)
+                       dict_t *dict, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1321,6 +1452,9 @@ fop_getxattr_cbk_stub (call_frame_t *frame,
         /* TODO */
         if (dict)
                 stub->args.getxattr_cbk.dict = dict_ref (dict);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1331,7 +1465,7 @@ fop_fsetxattr_stub (call_frame_t *frame,
                     fop_fsetxattr_t fn,
                     fd_t *fd,
                     dict_t *dict,
-                    int32_t flags)
+                    int32_t flags, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1348,6 +1482,9 @@ fop_fsetxattr_stub (call_frame_t *frame,
         if (dict)
                 stub->args.fsetxattr.dict = dict_ref (dict);
         stub->args.fsetxattr.flags = flags;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1357,7 +1494,7 @@ call_stub_t *
 fop_fsetxattr_cbk_stub (call_frame_t *frame,
                         fop_fsetxattr_cbk_t fn,
                         int32_t op_ret,
-                        int32_t op_errno)
+                        int32_t op_errno, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1369,6 +1506,9 @@ fop_fsetxattr_cbk_stub (call_frame_t *frame,
         stub->args.fsetxattr_cbk.fn = fn;
         stub->args.fsetxattr_cbk.op_ret = op_ret;
         stub->args.fsetxattr_cbk.op_errno = op_errno;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1378,7 +1518,7 @@ call_stub_t *
 fop_fgetxattr_stub (call_frame_t *frame,
                     fop_fgetxattr_t fn,
                     fd_t *fd,
-                    const char *name)
+                    const char *name, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1393,6 +1533,9 @@ fop_fgetxattr_stub (call_frame_t *frame,
 
         if (name)
                 stub->args.fgetxattr.name = gf_strdup (name);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1403,7 +1546,7 @@ fop_fgetxattr_cbk_stub (call_frame_t *frame,
                         fop_fgetxattr_cbk_t fn,
                         int32_t op_ret,
                         int32_t op_errno,
-                        dict_t *dict)
+                        dict_t *dict, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1419,6 +1562,9 @@ fop_fgetxattr_cbk_stub (call_frame_t *frame,
         /* TODO */
         if (dict)
                 stub->args.fgetxattr_cbk.dict = dict_ref (dict);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1428,7 +1574,7 @@ call_stub_t *
 fop_removexattr_stub (call_frame_t *frame,
                       fop_removexattr_t fn,
                       loc_t *loc,
-                      const char *name)
+                      const char *name, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1442,6 +1588,9 @@ fop_removexattr_stub (call_frame_t *frame,
         stub->args.removexattr.fn = fn;
         loc_copy (&stub->args.removexattr.loc, loc);
         stub->args.removexattr.name = gf_strdup (name);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1451,7 +1600,7 @@ call_stub_t *
 fop_removexattr_cbk_stub (call_frame_t *frame,
                           fop_removexattr_cbk_t fn,
                           int32_t op_ret,
-                          int32_t op_errno)
+                          int32_t op_errno, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1463,6 +1612,9 @@ fop_removexattr_cbk_stub (call_frame_t *frame,
         stub->args.removexattr_cbk.fn = fn;
         stub->args.removexattr_cbk.op_ret = op_ret;
         stub->args.removexattr_cbk.op_errno = op_errno;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1471,7 +1623,7 @@ call_stub_t *
 fop_fremovexattr_stub (call_frame_t *frame,
                        fop_fremovexattr_t fn,
                        fd_t *fd,
-                       const char *name)
+                       const char *name, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1485,6 +1637,9 @@ fop_fremovexattr_stub (call_frame_t *frame,
         stub->args.fremovexattr.fn = fn;
         stub->args.fremovexattr.fd = fd_ref (fd);
         stub->args.fremovexattr.name = gf_strdup (name);
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1494,7 +1649,7 @@ call_stub_t *
 fop_fremovexattr_cbk_stub (call_frame_t *frame,
                            fop_fremovexattr_cbk_t fn,
                            int32_t op_ret,
-                           int32_t op_errno)
+                           int32_t op_errno, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1506,6 +1661,9 @@ fop_fremovexattr_cbk_stub (call_frame_t *frame,
         stub->args.fremovexattr_cbk.fn = fn;
         stub->args.fremovexattr_cbk.op_ret = op_ret;
         stub->args.fremovexattr_cbk.op_errno = op_errno;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1515,7 +1673,7 @@ fop_lk_stub (call_frame_t *frame,
              fop_lk_t fn,
              fd_t *fd,
              int32_t cmd,
-             struct gf_flock *lock)
+             struct gf_flock *lock, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1530,6 +1688,9 @@ fop_lk_stub (call_frame_t *frame,
                 stub->args.lk.fd = fd_ref (fd);
         stub->args.lk.cmd = cmd;
         stub->args.lk.lock = *lock;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1540,8 +1701,7 @@ fop_lk_cbk_stub (call_frame_t *frame,
                  fop_lk_cbk_t fn,
                  int32_t op_ret,
                  int32_t op_errno,
-                 struct gf_flock *lock)
-
+                 struct gf_flock *lock, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1555,13 +1715,17 @@ fop_lk_cbk_stub (call_frame_t *frame,
         stub->args.lk_cbk.op_errno = op_errno;
         if (op_ret == 0)
                 stub->args.lk_cbk.lock = *lock;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
 
 call_stub_t *
 fop_inodelk_stub (call_frame_t *frame, fop_inodelk_t fn,
-                  const char *volume, loc_t *loc, int32_t cmd, struct gf_flock *lock)
+                  const char *volume, loc_t *loc, int32_t cmd,
+                  struct gf_flock *lock, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1579,13 +1743,16 @@ fop_inodelk_stub (call_frame_t *frame, fop_inodelk_t fn,
         loc_copy (&stub->args.inodelk.loc, loc);
         stub->args.inodelk.cmd  = cmd;
         stub->args.inodelk.lock = *lock;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
 
 call_stub_t *
 fop_inodelk_cbk_stub (call_frame_t *frame, fop_inodelk_cbk_t fn,
-                      int32_t op_ret, int32_t op_errno)
+                      int32_t op_ret, int32_t op_errno, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1598,6 +1765,9 @@ fop_inodelk_cbk_stub (call_frame_t *frame, fop_inodelk_cbk_t fn,
         stub->args.inodelk_cbk.op_ret   = op_ret;
         stub->args.inodelk_cbk.op_errno = op_errno;
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1605,7 +1775,8 @@ out:
 
 call_stub_t *
 fop_finodelk_stub (call_frame_t *frame, fop_finodelk_t fn,
-                   const char *volume, fd_t *fd, int32_t cmd, struct gf_flock *lock)
+                   const char *volume, fd_t *fd, int32_t cmd,
+                   struct gf_flock *lock, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1626,6 +1797,9 @@ fop_finodelk_stub (call_frame_t *frame, fop_finodelk_t fn,
         stub->args.finodelk.cmd  = cmd;
         stub->args.finodelk.lock = *lock;
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1633,7 +1807,7 @@ out:
 
 call_stub_t *
 fop_finodelk_cbk_stub (call_frame_t *frame, fop_inodelk_cbk_t fn,
-                       int32_t op_ret, int32_t op_errno)
+                       int32_t op_ret, int32_t op_errno, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1646,6 +1820,9 @@ fop_finodelk_cbk_stub (call_frame_t *frame, fop_inodelk_cbk_t fn,
         stub->args.finodelk_cbk.op_ret   = op_ret;
         stub->args.finodelk_cbk.op_errno = op_errno;
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1654,7 +1831,7 @@ out:
 call_stub_t *
 fop_entrylk_stub (call_frame_t *frame, fop_entrylk_t fn,
                   const char *volume, loc_t *loc, const char *name,
-                  entrylk_cmd cmd, entrylk_type type)
+                  entrylk_cmd cmd, entrylk_type type, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1675,13 +1852,16 @@ fop_entrylk_stub (call_frame_t *frame, fop_entrylk_t fn,
         if (name)
                 stub->args.entrylk.name = gf_strdup (name);
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
 
 call_stub_t *
 fop_entrylk_cbk_stub (call_frame_t *frame, fop_entrylk_cbk_t fn,
-                      int32_t op_ret, int32_t op_errno)
+                      int32_t op_ret, int32_t op_errno, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1694,6 +1874,9 @@ fop_entrylk_cbk_stub (call_frame_t *frame, fop_entrylk_cbk_t fn,
         stub->args.entrylk_cbk.op_ret   = op_ret;
         stub->args.entrylk_cbk.op_errno = op_errno;
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1702,7 +1885,7 @@ out:
 call_stub_t *
 fop_fentrylk_stub (call_frame_t *frame, fop_fentrylk_t fn,
                    const char *volume, fd_t *fd, const char *name,
-                   entrylk_cmd cmd, entrylk_type type)
+                   entrylk_cmd cmd, entrylk_type type, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1723,13 +1906,16 @@ fop_fentrylk_stub (call_frame_t *frame, fop_fentrylk_t fn,
         if (name)
                 stub->args.fentrylk.name = gf_strdup (name);
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
 
 call_stub_t *
 fop_fentrylk_cbk_stub (call_frame_t *frame, fop_fentrylk_cbk_t fn,
-                       int32_t op_ret, int32_t op_errno)
+                       int32_t op_ret, int32_t op_errno, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1742,6 +1928,9 @@ fop_fentrylk_cbk_stub (call_frame_t *frame, fop_fentrylk_cbk_t fn,
         stub->args.fentrylk_cbk.op_ret   = op_ret;
         stub->args.fentrylk_cbk.op_errno = op_errno;
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1752,7 +1941,7 @@ fop_readdirp_cbk_stub (call_frame_t *frame,
                        fop_readdirp_cbk_t fn,
                        int32_t op_ret,
                        int32_t op_errno,
-                       gf_dirent_t *entries)
+                       gf_dirent_t *entries, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
         gf_dirent_t *stub_entry = NULL, *entry = NULL;
@@ -1784,6 +1973,9 @@ fop_readdirp_cbk_stub (call_frame_t *frame,
                                        &stub->args.readdirp_cbk.entries.list);
                 }
         }
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1794,7 +1986,7 @@ fop_readdir_cbk_stub (call_frame_t *frame,
                       fop_readdir_cbk_t fn,
                       int32_t op_ret,
                       int32_t op_errno,
-                      gf_dirent_t *entries)
+                      gf_dirent_t *entries, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
         gf_dirent_t *stub_entry = NULL, *entry = NULL;
@@ -1826,6 +2018,9 @@ fop_readdir_cbk_stub (call_frame_t *frame,
                                        &stub->args.readdir_cbk.entries.list);
                 }
         }
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1835,7 +2030,7 @@ fop_readdir_stub (call_frame_t *frame,
                   fop_readdir_t fn,
                   fd_t *fd,
                   size_t size,
-                  off_t off)
+                  off_t off, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1847,6 +2042,9 @@ fop_readdir_stub (call_frame_t *frame,
         stub->args.readdir.size = size;
         stub->args.readdir.off = off;
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1857,7 +2055,7 @@ fop_readdirp_stub (call_frame_t *frame,
                    fd_t *fd,
                    size_t size,
                    off_t off,
-                   dict_t *dict)
+                   dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1868,9 +2066,8 @@ fop_readdirp_stub (call_frame_t *frame,
         stub->args.readdirp.fd = fd_ref (fd);
         stub->args.readdirp.size = size;
         stub->args.readdirp.off = off;
-        if (dict != NULL) {
-                stub->args.readdirp.dict = dict_ref (dict);
-        }
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
 
 out:
         return stub;
@@ -1880,7 +2077,7 @@ call_stub_t *
 fop_rchecksum_stub (call_frame_t *frame,
                     fop_rchecksum_t fn,
                     fd_t *fd, off_t offset,
-                    int32_t len)
+                    int32_t len, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1894,6 +2091,9 @@ fop_rchecksum_stub (call_frame_t *frame,
         stub->args.rchecksum.fd = fd_ref (fd);
         stub->args.rchecksum.offset = offset;
         stub->args.rchecksum.len    = len;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1905,7 +2105,7 @@ fop_rchecksum_cbk_stub (call_frame_t *frame,
                         int32_t op_ret,
                         int32_t op_errno,
                         uint32_t weak_checksum,
-                        uint8_t *strong_checksum)
+                        uint8_t *strong_checksum, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1926,6 +2126,9 @@ fop_rchecksum_cbk_stub (call_frame_t *frame,
                 stub->args.rchecksum_cbk.strong_checksum =
                         memdup (strong_checksum, MD5_DIGEST_LEN);
         }
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1935,7 +2138,7 @@ call_stub_t *
 fop_xattrop_cbk_stub (call_frame_t *frame,
                       fop_xattrop_cbk_t fn,
                       int32_t op_ret,
-                      int32_t op_errno)
+                      int32_t op_errno, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1948,6 +2151,9 @@ fop_xattrop_cbk_stub (call_frame_t *frame,
         stub->args.xattrop_cbk.op_ret   = op_ret;
         stub->args.xattrop_cbk.op_errno = op_errno;
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1958,7 +2164,7 @@ fop_fxattrop_cbk_stub (call_frame_t *frame,
                        fop_fxattrop_cbk_t fn,
                        int32_t op_ret,
                        int32_t op_errno,
-                       dict_t *xattr)
+                       dict_t *xattr, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
         GF_VALIDATE_OR_GOTO ("call-stub", frame, out);
@@ -1972,6 +2178,9 @@ fop_fxattrop_cbk_stub (call_frame_t *frame,
         if (xattr)
                 stub->args.fxattrop_cbk.xattr = dict_ref (xattr);
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -1982,7 +2191,7 @@ fop_xattrop_stub (call_frame_t *frame,
                   fop_xattrop_t fn,
                   loc_t *loc,
                   gf_xattrop_flags_t optype,
-                  dict_t *xattr)
+                  dict_t *xattr, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -1999,6 +2208,9 @@ fop_xattrop_stub (call_frame_t *frame,
         stub->args.xattrop.optype = optype;
         stub->args.xattrop.xattr = dict_ref (xattr);
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -2008,7 +2220,7 @@ fop_fxattrop_stub (call_frame_t *frame,
                    fop_fxattrop_t fn,
                    fd_t *fd,
                    gf_xattrop_flags_t optype,
-                   dict_t *xattr)
+                   dict_t *xattr, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -2025,6 +2237,9 @@ fop_fxattrop_stub (call_frame_t *frame,
         stub->args.fxattrop.optype = optype;
         stub->args.fxattrop.xattr = dict_ref (xattr);
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -2036,7 +2251,7 @@ fop_setattr_cbk_stub (call_frame_t *frame,
                       int32_t op_ret,
                       int32_t op_errno,
                       struct iatt *statpre,
-                      struct iatt *statpost)
+                      struct iatt *statpost, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -2055,6 +2270,9 @@ fop_setattr_cbk_stub (call_frame_t *frame,
         if (statpost)
                 stub->args.setattr_cbk.statpost = *statpost;
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -2065,7 +2283,7 @@ fop_fsetattr_cbk_stub (call_frame_t *frame,
                        int32_t op_ret,
                        int32_t op_errno,
                        struct iatt *statpre,
-                       struct iatt *statpost)
+                       struct iatt *statpost, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -2083,6 +2301,9 @@ fop_fsetattr_cbk_stub (call_frame_t *frame,
                 stub->args.setattr_cbk.statpre = *statpre;
         if (statpost)
                 stub->args.fsetattr_cbk.statpost = *statpost;
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -2092,7 +2313,7 @@ fop_setattr_stub (call_frame_t *frame,
                   fop_setattr_t fn,
                   loc_t *loc,
                   struct iatt *stbuf,
-                  int32_t valid)
+                  int32_t valid, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -2111,6 +2332,9 @@ fop_setattr_stub (call_frame_t *frame,
 
         stub->args.setattr.valid = valid;
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -2120,7 +2344,7 @@ fop_fsetattr_stub (call_frame_t *frame,
                    fop_fsetattr_t fn,
                    fd_t *fd,
                    struct iatt *stbuf,
-                   int32_t valid)
+                   int32_t valid, dict_t *xdata)
 {
         call_stub_t *stub = NULL;
 
@@ -2140,6 +2364,9 @@ fop_fsetattr_stub (call_frame_t *frame,
 
         stub->args.fsetattr.valid = valid;
 
+        if (xdata)
+                stub->xdata = dict_ref (xdata);
+
 out:
         return stub;
 }
@@ -2156,7 +2383,7 @@ call_resume_wind (call_stub_t *stub)
                                     stub->frame->this,
                                     &stub->args.open.loc,
                                     stub->args.open.flags, stub->args.open.fd,
-                                    stub->args.open.wbflags);
+                                    stub->xdata);
                 break;
         }
         case GF_FOP_CREATE:
@@ -2166,15 +2393,16 @@ call_resume_wind (call_stub_t *stub)
                                       &stub->args.create.loc,
                                       stub->args.create.flags,
                                       stub->args.create.mode,
+                                      stub->args.create.umask,
                                       stub->args.create.fd,
-                                      stub->args.create.params);
+                                      stub->xdata);
                 break;
         }
         case GF_FOP_STAT:
         {
                 stub->args.stat.fn (stub->frame,
                                     stub->frame->this,
-                                    &stub->args.stat.loc);
+                                    &stub->args.stat.loc, stub->xdata);
                 break;
         }
         case GF_FOP_READLINK:
@@ -2182,7 +2410,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.readlink.fn (stub->frame,
                                         stub->frame->this,
                                         &stub->args.readlink.loc,
-                                        stub->args.readlink.size);
+                                        stub->args.readlink.size, stub->xdata);
                 break;
         }
 
@@ -2192,7 +2420,7 @@ call_resume_wind (call_stub_t *stub)
                                      &stub->args.mknod.loc,
                                      stub->args.mknod.mode,
                                      stub->args.mknod.rdev,
-                                     stub->args.mknod.params);
+                                     stub->args.mknod.umask, stub->xdata);
         }
         break;
 
@@ -2201,7 +2429,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.mkdir.fn (stub->frame, stub->frame->this,
                                      &stub->args.mkdir.loc,
                                      stub->args.mkdir.mode,
-                                     stub->args.mkdir.params);
+                                     stub->args.mkdir.umask, stub->xdata);
         }
         break;
 
@@ -2209,7 +2437,8 @@ call_resume_wind (call_stub_t *stub)
         {
                 stub->args.unlink.fn (stub->frame,
                                       stub->frame->this,
-                                      &stub->args.unlink.loc);
+                                      &stub->args.unlink.loc,
+                                      stub->args.unlink.xflag, stub->xdata);
         }
         break;
 
@@ -2217,7 +2446,7 @@ call_resume_wind (call_stub_t *stub)
         {
                 stub->args.rmdir.fn (stub->frame, stub->frame->this,
                                      &stub->args.rmdir.loc,
-                                     stub->args.rmdir.flags);
+                                     stub->args.rmdir.flags, stub->xdata);
         }
         break;
 
@@ -2227,7 +2456,7 @@ call_resume_wind (call_stub_t *stub)
                                        stub->frame->this,
                                        stub->args.symlink.linkname,
                                        &stub->args.symlink.loc,
-                                       stub->args.symlink.params);
+                                       stub->args.symlink.umask, stub->xdata);
         }
         break;
 
@@ -2236,7 +2465,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.rename.fn (stub->frame,
                                       stub->frame->this,
                                       &stub->args.rename.old,
-                                      &stub->args.rename.new);
+                                      &stub->args.rename.new, stub->xdata);
         }
         break;
 
@@ -2245,7 +2474,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.link.fn (stub->frame,
                                     stub->frame->this,
                                     &stub->args.link.oldloc,
-                                    &stub->args.link.newloc);
+                                    &stub->args.link.newloc, stub->xdata);
         }
         break;
 
@@ -2254,7 +2483,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.truncate.fn (stub->frame,
                                         stub->frame->this,
                                         &stub->args.truncate.loc,
-                                        stub->args.truncate.off);
+                                        stub->args.truncate.off, stub->xdata);
                 break;
         }
 
@@ -2265,7 +2494,7 @@ call_resume_wind (call_stub_t *stub)
                                      stub->args.readv.fd,
                                      stub->args.readv.size,
                                      stub->args.readv.off,
-                                     stub->args.readv.flags);
+                                     stub->args.readv.flags, stub->xdata);
                 break;
         }
 
@@ -2278,7 +2507,7 @@ call_resume_wind (call_stub_t *stub)
                                       stub->args.writev.count,
                                       stub->args.writev.off,
                                       stub->args.writev.flags,
-                                      stub->args.writev.iobref);
+                                      stub->args.writev.iobref, stub->xdata);
                 break;
         }
 
@@ -2286,14 +2515,14 @@ call_resume_wind (call_stub_t *stub)
         {
                 stub->args.statfs.fn (stub->frame,
                                       stub->frame->this,
-                                      &stub->args.statfs.loc);
+                                      &stub->args.statfs.loc, stub->xdata);
                 break;
         }
         case GF_FOP_FLUSH:
         {
                 stub->args.flush.fn (stub->frame,
                                      stub->frame->this,
-                                     stub->args.flush.fd);
+                                     stub->args.flush.fd, stub->xdata);
                 break;
         }
 
@@ -2302,7 +2531,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.fsync.fn (stub->frame,
                                      stub->frame->this,
                                      stub->args.fsync.fd,
-                                     stub->args.fsync.datasync);
+                                     stub->args.fsync.datasync, stub->xdata);
                 break;
         }
 
@@ -2312,7 +2541,7 @@ call_resume_wind (call_stub_t *stub)
                                         stub->frame->this,
                                         &stub->args.setxattr.loc,
                                         stub->args.setxattr.dict,
-                                        stub->args.setxattr.flags);
+                                        stub->args.setxattr.flags, stub->xdata);
                 break;
         }
 
@@ -2321,7 +2550,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.getxattr.fn (stub->frame,
                                         stub->frame->this,
                                         &stub->args.getxattr.loc,
-                                        stub->args.getxattr.name);
+                                        stub->args.getxattr.name, stub->xdata);
                 break;
         }
 
@@ -2331,7 +2560,7 @@ call_resume_wind (call_stub_t *stub)
                                          stub->frame->this,
                                          stub->args.fsetxattr.fd,
                                          stub->args.fsetxattr.dict,
-                                         stub->args.fsetxattr.flags);
+                                         stub->args.fsetxattr.flags, stub->xdata);
                 break;
         }
 
@@ -2340,7 +2569,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.fgetxattr.fn (stub->frame,
                                          stub->frame->this,
                                          stub->args.fgetxattr.fd,
-                                         stub->args.fgetxattr.name);
+                                         stub->args.fgetxattr.name, stub->xdata);
                 break;
         }
 
@@ -2349,7 +2578,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.removexattr.fn (stub->frame,
                                            stub->frame->this,
                                            &stub->args.removexattr.loc,
-                                           stub->args.removexattr.name);
+                                           stub->args.removexattr.name, stub->xdata);
                 break;
         }
 
@@ -2358,7 +2587,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.fremovexattr.fn (stub->frame,
                                             stub->frame->this,
                                             stub->args.fremovexattr.fd,
-                                            stub->args.fremovexattr.name);
+                                            stub->args.fremovexattr.name, stub->xdata);
                 break;
         }
 
@@ -2367,7 +2596,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.opendir.fn (stub->frame,
                                        stub->frame->this,
                                        &stub->args.opendir.loc,
-                                       stub->args.opendir.fd);
+                                       stub->args.opendir.fd, stub->xdata);
                 break;
         }
 
@@ -2376,7 +2605,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.fsyncdir.fn (stub->frame,
                                         stub->frame->this,
                                         stub->args.fsyncdir.fd,
-                                        stub->args.fsyncdir.datasync);
+                                        stub->args.fsyncdir.datasync, stub->xdata);
                 break;
         }
 
@@ -2385,7 +2614,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.access.fn (stub->frame,
                                       stub->frame->this,
                                       &stub->args.access.loc,
-                                      stub->args.access.mask);
+                                      stub->args.access.mask, stub->xdata);
                 break;
         }
 
@@ -2394,7 +2623,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.ftruncate.fn (stub->frame,
                                          stub->frame->this,
                                          stub->args.ftruncate.fd,
-                                         stub->args.ftruncate.off);
+                                         stub->args.ftruncate.off, stub->xdata);
                 break;
         }
 
@@ -2402,7 +2631,7 @@ call_resume_wind (call_stub_t *stub)
         {
                 stub->args.fstat.fn (stub->frame,
                                      stub->frame->this,
-                                     stub->args.fstat.fd);
+                                     stub->args.fstat.fd, stub->xdata);
                 break;
         }
 
@@ -2412,7 +2641,7 @@ call_resume_wind (call_stub_t *stub)
                                   stub->frame->this,
                                   stub->args.lk.fd,
                                   stub->args.lk.cmd,
-                                  &stub->args.lk.lock);
+                                  &stub->args.lk.lock, stub->xdata);
                 break;
         }
 
@@ -2423,7 +2652,7 @@ call_resume_wind (call_stub_t *stub)
                                        stub->args.inodelk.volume,
                                        &stub->args.inodelk.loc,
                                        stub->args.inodelk.cmd,
-                                       &stub->args.inodelk.lock);
+                                       &stub->args.inodelk.lock, stub->xdata);
                 break;
         }
 
@@ -2434,7 +2663,7 @@ call_resume_wind (call_stub_t *stub)
                                         stub->args.finodelk.volume,
                                         stub->args.finodelk.fd,
                                         stub->args.finodelk.cmd,
-                                        &stub->args.finodelk.lock);
+                                        &stub->args.finodelk.lock, stub->xdata);
                 break;
         }
 
@@ -2446,7 +2675,7 @@ call_resume_wind (call_stub_t *stub)
                                        &stub->args.entrylk.loc,
                                        stub->args.entrylk.name,
                                        stub->args.entrylk.cmd,
-                                       stub->args.entrylk.type);
+                                       stub->args.entrylk.type, stub->xdata);
                 break;
         }
 
@@ -2458,7 +2687,7 @@ call_resume_wind (call_stub_t *stub)
                                         stub->args.fentrylk.fd,
                                         stub->args.fentrylk.name,
                                         stub->args.fentrylk.cmd,
-                                        stub->args.fentrylk.type);
+                                        stub->args.fentrylk.type, stub->xdata);
                 break;
         }
 
@@ -2469,7 +2698,7 @@ call_resume_wind (call_stub_t *stub)
                 stub->args.lookup.fn (stub->frame,
                                       stub->frame->this,
                                       &stub->args.lookup.loc,
-                                      stub->args.lookup.xattr_req);
+                                      stub->xdata);
                 break;
         }
 
@@ -2479,7 +2708,7 @@ call_resume_wind (call_stub_t *stub)
                                          stub->frame->this,
                                          stub->args.rchecksum.fd,
                                          stub->args.rchecksum.offset,
-                                         stub->args.rchecksum.len);
+                                         stub->args.rchecksum.len, stub->xdata);
                 break;
         }
 
@@ -2489,7 +2718,7 @@ call_resume_wind (call_stub_t *stub)
                                        stub->frame->this,
                                        stub->args.readdir.fd,
                                        stub->args.readdir.size,
-                                       stub->args.readdir.off);
+                                       stub->args.readdir.off, stub->xdata);
                 break;
         }
 
@@ -2500,7 +2729,7 @@ call_resume_wind (call_stub_t *stub)
                                         stub->args.readdirp.fd,
                                         stub->args.readdirp.size,
                                         stub->args.readdirp.off,
-                                        stub->args.readdirp.dict);
+                                        stub->xdata);
                 break;
         }
 
@@ -2510,7 +2739,7 @@ call_resume_wind (call_stub_t *stub)
                                        stub->frame->this,
                                        &stub->args.xattrop.loc,
                                        stub->args.xattrop.optype,
-                                       stub->args.xattrop.xattr);
+                                       stub->args.xattrop.xattr, stub->xdata);
 
                 break;
         }
@@ -2520,7 +2749,7 @@ call_resume_wind (call_stub_t *stub)
                                         stub->frame->this,
                                         stub->args.fxattrop.fd,
                                         stub->args.fxattrop.optype,
-                                        stub->args.fxattrop.xattr);
+                                        stub->args.fxattrop.xattr, stub->xdata);
 
                 break;
         }
@@ -2530,7 +2759,7 @@ call_resume_wind (call_stub_t *stub)
                                        stub->frame->this,
                                        &stub->args.setattr.loc,
                                        &stub->args.setattr.stbuf,
-                                       stub->args.setattr.valid);
+                                       stub->args.setattr.valid, stub->xdata);
                 break;
         }
         case GF_FOP_FSETATTR:
@@ -2539,7 +2768,7 @@ call_resume_wind (call_stub_t *stub)
                                         stub->frame->this,
                                         stub->args.fsetattr.fd,
                                         &stub->args.fsetattr.stbuf,
-                                        stub->args.fsetattr.valid);
+                                        stub->args.fsetattr.valid, stub->xdata);
                 break;
         }
         default:
@@ -2569,14 +2798,14 @@ call_resume_unwind (call_stub_t *stub)
                         STACK_UNWIND (stub->frame,
                                       stub->args.open_cbk.op_ret,
                                       stub->args.open_cbk.op_errno,
-                                      stub->args.open_cbk.fd);
+                                      stub->args.open_cbk.fd, stub->xdata);
                 else
                         stub->args.open_cbk.fn (stub->frame,
                                                 stub->frame->cookie,
                                                 stub->frame->this,
                                                 stub->args.open_cbk.op_ret,
                                                 stub->args.open_cbk.op_errno,
-                                                stub->args.open_cbk.fd);
+                                                stub->args.open_cbk.fd, stub->xdata);
                 break;
         }
 
@@ -2590,7 +2819,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.create_cbk.inode,
                                       &stub->args.create_cbk.buf,
                                       &stub->args.create_cbk.preparent,
-                                      &stub->args.create_cbk.postparent);
+                                      &stub->args.create_cbk.postparent, stub->xdata);
                 else
                         stub->args.create_cbk.fn (stub->frame,
                                                   stub->frame->cookie,
@@ -2601,7 +2830,7 @@ call_resume_unwind (call_stub_t *stub)
                                                   stub->args.create_cbk.inode,
                                                   &stub->args.create_cbk.buf,
                                                   &stub->args.create_cbk.preparent,
-                                                  &stub->args.create_cbk.postparent);
+                                                  &stub->args.create_cbk.postparent, stub->xdata);
 
                 break;
         }
@@ -2612,14 +2841,14 @@ call_resume_unwind (call_stub_t *stub)
                         STACK_UNWIND (stub->frame,
                                       stub->args.stat_cbk.op_ret,
                                       stub->args.stat_cbk.op_errno,
-                                      &stub->args.stat_cbk.buf);
+                                      &stub->args.stat_cbk.buf, stub->xdata);
                 else
                         stub->args.stat_cbk.fn (stub->frame,
                                                 stub->frame->cookie,
                                                 stub->frame->this,
                                                 stub->args.stat_cbk.op_ret,
                                                 stub->args.stat_cbk.op_errno,
-                                                &stub->args.stat_cbk.buf);
+                                                &stub->args.stat_cbk.buf, stub->xdata);
 
                 break;
         }
@@ -2631,7 +2860,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.readlink_cbk.op_ret,
                                       stub->args.readlink_cbk.op_errno,
                                       stub->args.readlink_cbk.buf,
-                                      &stub->args.readlink_cbk.sbuf);
+                                      &stub->args.readlink_cbk.sbuf, stub->xdata);
                 else
                         stub->args.readlink_cbk.fn (stub->frame,
                                                     stub->frame->cookie,
@@ -2639,7 +2868,7 @@ call_resume_unwind (call_stub_t *stub)
                                                     stub->args.readlink_cbk.op_ret,
                                                     stub->args.readlink_cbk.op_errno,
                                                     stub->args.readlink_cbk.buf,
-                                                    &stub->args.readlink_cbk.sbuf);
+                                                    &stub->args.readlink_cbk.sbuf, stub->xdata);
 
                 break;
         }
@@ -2653,7 +2882,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.mknod_cbk.inode,
                                       &stub->args.mknod_cbk.buf,
                                       &stub->args.mknod_cbk.preparent,
-                                      &stub->args.mknod_cbk.postparent);
+                                      &stub->args.mknod_cbk.postparent, stub->xdata);
                 else
                         stub->args.mknod_cbk.fn (stub->frame,
                                                  stub->frame->cookie,
@@ -2663,7 +2892,7 @@ call_resume_unwind (call_stub_t *stub)
                                                  stub->args.mknod_cbk.inode,
                                                  &stub->args.mknod_cbk.buf,
                                                  &stub->args.mknod_cbk.preparent,
-                                                 &stub->args.mknod_cbk.postparent);
+                                                 &stub->args.mknod_cbk.postparent, stub->xdata);
                 break;
         }
 
@@ -2676,7 +2905,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.mkdir_cbk.inode,
                                       &stub->args.mkdir_cbk.buf,
                                       &stub->args.mkdir_cbk.preparent,
-                                      &stub->args.mkdir_cbk.postparent);
+                                      &stub->args.mkdir_cbk.postparent, stub->xdata);
                 else
                         stub->args.mkdir_cbk.fn (stub->frame,
                                                  stub->frame->cookie,
@@ -2686,7 +2915,7 @@ call_resume_unwind (call_stub_t *stub)
                                                  stub->args.mkdir_cbk.inode,
                                                  &stub->args.mkdir_cbk.buf,
                                                  &stub->args.mkdir_cbk.preparent,
-                                                 &stub->args.mkdir_cbk.postparent);
+                                                 &stub->args.mkdir_cbk.postparent, stub->xdata);
 
                 if (stub->args.mkdir_cbk.inode)
                         inode_unref (stub->args.mkdir_cbk.inode);
@@ -2701,7 +2930,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.unlink_cbk.op_ret,
                                       stub->args.unlink_cbk.op_errno,
                                       &stub->args.unlink_cbk.preparent,
-                                      &stub->args.unlink_cbk.postparent);
+                                      &stub->args.unlink_cbk.postparent, stub->xdata);
                 else
                         stub->args.unlink_cbk.fn (stub->frame,
                                                   stub->frame->cookie,
@@ -2709,7 +2938,7 @@ call_resume_unwind (call_stub_t *stub)
                                                   stub->args.unlink_cbk.op_ret,
                                                   stub->args.unlink_cbk.op_errno,
                                                   &stub->args.unlink_cbk.preparent,
-                                                  &stub->args.unlink_cbk.postparent);
+                                                  &stub->args.unlink_cbk.postparent, stub->xdata);
                 break;
         }
 
@@ -2720,7 +2949,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.rmdir_cbk.op_ret,
                                       stub->args.rmdir_cbk.op_errno,
                                       &stub->args.rmdir_cbk.preparent,
-                                      &stub->args.rmdir_cbk.postparent);
+                                      &stub->args.rmdir_cbk.postparent, stub->xdata);
                 else
                         stub->args.rmdir_cbk.fn (stub->frame,
                                                  stub->frame->cookie,
@@ -2728,7 +2957,7 @@ call_resume_unwind (call_stub_t *stub)
                                                  stub->args.rmdir_cbk.op_ret,
                                                  stub->args.rmdir_cbk.op_errno,
                                                  &stub->args.rmdir_cbk.preparent,
-                                                 &stub->args.rmdir_cbk.postparent);
+                                                 &stub->args.rmdir_cbk.postparent, stub->xdata);
                 break;
         }
 
@@ -2741,7 +2970,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.symlink_cbk.inode,
                                       &stub->args.symlink_cbk.buf,
                                       &stub->args.symlink_cbk.preparent,
-                                      &stub->args.symlink_cbk.postparent);
+                                      &stub->args.symlink_cbk.postparent, stub->xdata);
                 else
                         stub->args.symlink_cbk.fn (stub->frame,
                                                    stub->frame->cookie,
@@ -2751,7 +2980,7 @@ call_resume_unwind (call_stub_t *stub)
                                                    stub->args.symlink_cbk.inode,
                                                    &stub->args.symlink_cbk.buf,
                                                    &stub->args.symlink_cbk.preparent,
-                                                   &stub->args.symlink_cbk.postparent);
+                                                   &stub->args.symlink_cbk.postparent, stub->xdata);
         }
         break;
 
@@ -2765,7 +2994,7 @@ call_resume_unwind (call_stub_t *stub)
                                       &stub->args.rename_cbk.preoldparent,
                                       &stub->args.rename_cbk.postoldparent,
                                       &stub->args.rename_cbk.prenewparent,
-                                      &stub->args.rename_cbk.postnewparent);
+                                      &stub->args.rename_cbk.postnewparent, stub->xdata);
                 else
                         stub->args.rename_cbk.fn (stub->frame,
                                                   stub->frame->cookie,
@@ -2776,7 +3005,7 @@ call_resume_unwind (call_stub_t *stub)
                                                   &stub->args.rename_cbk.preoldparent,
                                                   &stub->args.rename_cbk.postoldparent,
                                                   &stub->args.rename_cbk.prenewparent,
-                                                  &stub->args.rename_cbk.postnewparent);
+                                                  &stub->args.rename_cbk.postnewparent, stub->xdata);
                 break;
         }
 
@@ -2787,7 +3016,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.link_cbk.op_ret,
                                       stub->args.link_cbk.op_errno,
                                       stub->args.link_cbk.inode,
-                                      &stub->args.link_cbk.buf);
+                                      &stub->args.link_cbk.buf, stub->xdata);
                 else
                         stub->args.link_cbk.fn (stub->frame,
                                                 stub->frame->cookie,
@@ -2797,7 +3026,7 @@ call_resume_unwind (call_stub_t *stub)
                                                 stub->args.link_cbk.inode,
                                                 &stub->args.link_cbk.buf,
                                                 &stub->args.link_cbk.preparent,
-                                                &stub->args.link_cbk.postparent);
+                                                &stub->args.link_cbk.postparent, stub->xdata);
                 break;
         }
 
@@ -2808,7 +3037,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.truncate_cbk.op_ret,
                                       stub->args.truncate_cbk.op_errno,
                                       &stub->args.truncate_cbk.prebuf,
-                                      &stub->args.truncate_cbk.postbuf);
+                                      &stub->args.truncate_cbk.postbuf, stub->xdata);
                 else
                         stub->args.truncate_cbk.fn (stub->frame,
                                                     stub->frame->cookie,
@@ -2816,7 +3045,7 @@ call_resume_unwind (call_stub_t *stub)
                                                     stub->args.truncate_cbk.op_ret,
                                                     stub->args.truncate_cbk.op_errno,
                                                     &stub->args.truncate_cbk.prebuf,
-                                                    &stub->args.truncate_cbk.postbuf);
+                                                    &stub->args.truncate_cbk.postbuf, stub->xdata);
                 break;
         }
 
@@ -2829,7 +3058,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.readv_cbk.vector,
                                       stub->args.readv_cbk.count,
                                       &stub->args.readv_cbk.stbuf,
-                                      stub->args.readv_cbk.iobref);
+                                      stub->args.readv_cbk.iobref, stub->xdata);
                 else
                         stub->args.readv_cbk.fn (stub->frame,
                                                  stub->frame->cookie,
@@ -2839,7 +3068,7 @@ call_resume_unwind (call_stub_t *stub)
                                                  stub->args.readv_cbk.vector,
                                                  stub->args.readv_cbk.count,
                                                  &stub->args.readv_cbk.stbuf,
-                                                 stub->args.readv_cbk.iobref);
+                                                 stub->args.readv_cbk.iobref, stub->xdata);
         }
         break;
 
@@ -2850,7 +3079,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.writev_cbk.op_ret,
                                       stub->args.writev_cbk.op_errno,
                                       &stub->args.writev_cbk.prebuf,
-                                      &stub->args.writev_cbk.postbuf);
+                                      &stub->args.writev_cbk.postbuf, stub->xdata);
                 else
                         stub->args.writev_cbk.fn (stub->frame,
                                                   stub->frame->cookie,
@@ -2858,7 +3087,7 @@ call_resume_unwind (call_stub_t *stub)
                                                   stub->args.writev_cbk.op_ret,
                                                   stub->args.writev_cbk.op_errno,
                                                   &stub->args.writev_cbk.prebuf,
-                                                  &stub->args.writev_cbk.postbuf);
+                                                  &stub->args.writev_cbk.postbuf, stub->xdata);
                 break;
         }
 
@@ -2868,14 +3097,14 @@ call_resume_unwind (call_stub_t *stub)
                         STACK_UNWIND (stub->frame,
                                       stub->args.statfs_cbk.op_ret,
                                       stub->args.statfs_cbk.op_errno,
-                                      &(stub->args.statfs_cbk.buf));
+                                      &(stub->args.statfs_cbk.buf), stub->xdata);
                 else
                         stub->args.statfs_cbk.fn (stub->frame,
                                                   stub->frame->cookie,
                                                   stub->frame->this,
                                                   stub->args.statfs_cbk.op_ret,
                                                   stub->args.statfs_cbk.op_errno,
-                                                  &(stub->args.statfs_cbk.buf));
+                                                  &(stub->args.statfs_cbk.buf), stub->xdata);
         }
         break;
 
@@ -2884,13 +3113,13 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.flush_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.flush_cbk.op_ret,
-                                      stub->args.flush_cbk.op_errno);
+                                      stub->args.flush_cbk.op_errno, stub->xdata);
                 else
                         stub->args.flush_cbk.fn (stub->frame,
                                                  stub->frame->cookie,
                                                  stub->frame->this,
                                                  stub->args.flush_cbk.op_ret,
-                                                 stub->args.flush_cbk.op_errno);
+                                                 stub->args.flush_cbk.op_errno, stub->xdata);
 
                 break;
         }
@@ -2902,7 +3131,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.fsync_cbk.op_ret,
                                       stub->args.fsync_cbk.op_errno,
                                       &stub->args.fsync_cbk.prebuf,
-                                      &stub->args.fsync_cbk.postbuf);
+                                      &stub->args.fsync_cbk.postbuf, stub->xdata);
                 else
                         stub->args.fsync_cbk.fn (stub->frame,
                                                  stub->frame->cookie,
@@ -2910,7 +3139,7 @@ call_resume_unwind (call_stub_t *stub)
                                                  stub->args.fsync_cbk.op_ret,
                                                  stub->args.fsync_cbk.op_errno,
                                                  &stub->args.fsync_cbk.prebuf,
-                                                 &stub->args.fsync_cbk.postbuf);
+                                                 &stub->args.fsync_cbk.postbuf, stub->xdata);
                 break;
         }
 
@@ -2919,14 +3148,14 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.setxattr_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.setxattr_cbk.op_ret,
-                                      stub->args.setxattr_cbk.op_errno);
+                                      stub->args.setxattr_cbk.op_errno, stub->xdata);
 
                 else
                         stub->args.setxattr_cbk.fn (stub->frame,
                                                     stub->frame->cookie,
                                                     stub->frame->this,
                                                     stub->args.setxattr_cbk.op_ret,
-                                                    stub->args.setxattr_cbk.op_errno);
+                                                    stub->args.setxattr_cbk.op_errno, stub->xdata);
 
                 break;
         }
@@ -2937,14 +3166,14 @@ call_resume_unwind (call_stub_t *stub)
                         STACK_UNWIND (stub->frame,
                                       stub->args.getxattr_cbk.op_ret,
                                       stub->args.getxattr_cbk.op_errno,
-                                      stub->args.getxattr_cbk.dict);
+                                      stub->args.getxattr_cbk.dict, stub->xdata);
                 else
                         stub->args.getxattr_cbk.fn (stub->frame,
                                                     stub->frame->cookie,
                                                     stub->frame->this,
                                                     stub->args.getxattr_cbk.op_ret,
                                                     stub->args.getxattr_cbk.op_errno,
-                                                    stub->args.getxattr_cbk.dict);
+                                                    stub->args.getxattr_cbk.dict, stub->xdata);
                 break;
         }
 
@@ -2953,14 +3182,14 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.fsetxattr_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.fsetxattr_cbk.op_ret,
-                                      stub->args.fsetxattr_cbk.op_errno);
+                                      stub->args.fsetxattr_cbk.op_errno, stub->xdata);
 
                 else
                         stub->args.fsetxattr_cbk.fn (stub->frame,
                                                      stub->frame->cookie,
                                                      stub->frame->this,
                                                      stub->args.fsetxattr_cbk.op_ret,
-                                                     stub->args.fsetxattr_cbk.op_errno);
+                                                     stub->args.fsetxattr_cbk.op_errno, stub->xdata);
 
                 break;
         }
@@ -2971,14 +3200,14 @@ call_resume_unwind (call_stub_t *stub)
                         STACK_UNWIND (stub->frame,
                                       stub->args.fgetxattr_cbk.op_ret,
                                       stub->args.fgetxattr_cbk.op_errno,
-                                      stub->args.fgetxattr_cbk.dict);
+                                      stub->args.fgetxattr_cbk.dict, stub->xdata);
                 else
                         stub->args.fgetxattr_cbk.fn (stub->frame,
                                                      stub->frame->cookie,
                                                      stub->frame->this,
                                                      stub->args.fgetxattr_cbk.op_ret,
                                                      stub->args.fgetxattr_cbk.op_errno,
-                                                     stub->args.fgetxattr_cbk.dict);
+                                                     stub->args.fgetxattr_cbk.dict, stub->xdata);
                 break;
         }
 
@@ -2987,13 +3216,13 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.removexattr_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.removexattr_cbk.op_ret,
-                                      stub->args.removexattr_cbk.op_errno);
+                                      stub->args.removexattr_cbk.op_errno, stub->xdata);
                 else
                         stub->args.removexattr_cbk.fn (stub->frame,
                                                        stub->frame->cookie,
                                                        stub->frame->this,
                                                        stub->args.removexattr_cbk.op_ret,
-                                                       stub->args.removexattr_cbk.op_errno);
+                                                       stub->args.removexattr_cbk.op_errno, stub->xdata);
 
                 break;
         }
@@ -3003,13 +3232,13 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.fremovexattr_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.fremovexattr_cbk.op_ret,
-                                      stub->args.fremovexattr_cbk.op_errno);
+                                      stub->args.fremovexattr_cbk.op_errno, stub->xdata);
                 else
                         stub->args.fremovexattr_cbk.fn (stub->frame,
                                                         stub->frame->cookie,
                                                         stub->frame->this,
                                                         stub->args.fremovexattr_cbk.op_ret,
-                                                        stub->args.fremovexattr_cbk.op_errno);
+                                                        stub->args.fremovexattr_cbk.op_errno, stub->xdata);
 
                 break;
         }
@@ -3020,14 +3249,14 @@ call_resume_unwind (call_stub_t *stub)
                         STACK_UNWIND (stub->frame,
                                       stub->args.opendir_cbk.op_ret,
                                       stub->args.opendir_cbk.op_errno,
-                                      stub->args.opendir_cbk.fd);
+                                      stub->args.opendir_cbk.fd, stub->xdata);
                 else
                         stub->args.opendir_cbk.fn (stub->frame,
                                                    stub->frame->cookie,
                                                    stub->frame->this,
                                                    stub->args.opendir_cbk.op_ret,
                                                    stub->args.opendir_cbk.op_errno,
-                                                   stub->args.opendir_cbk.fd);
+                                                   stub->args.opendir_cbk.fd, stub->xdata);
                 break;
         }
 
@@ -3036,13 +3265,13 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.fsyncdir_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.fsyncdir_cbk.op_ret,
-                                      stub->args.fsyncdir_cbk.op_errno);
+                                      stub->args.fsyncdir_cbk.op_errno, stub->xdata);
                 else
                         stub->args.fsyncdir_cbk.fn (stub->frame,
                                                     stub->frame->cookie,
                                                     stub->frame->this,
                                                     stub->args.fsyncdir_cbk.op_ret,
-                                                    stub->args.fsyncdir_cbk.op_errno);
+                                                    stub->args.fsyncdir_cbk.op_errno, stub->xdata);
                 break;
         }
 
@@ -3051,13 +3280,13 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.access_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.access_cbk.op_ret,
-                                      stub->args.access_cbk.op_errno);
+                                      stub->args.access_cbk.op_errno, stub->xdata);
                 else
                         stub->args.access_cbk.fn (stub->frame,
                                                   stub->frame->cookie,
                                                   stub->frame->this,
                                                   stub->args.access_cbk.op_ret,
-                                                  stub->args.access_cbk.op_errno);
+                                                  stub->args.access_cbk.op_errno, stub->xdata);
 
                 break;
         }
@@ -3069,7 +3298,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.ftruncate_cbk.op_ret,
                                       stub->args.ftruncate_cbk.op_errno,
                                       &stub->args.ftruncate_cbk.prebuf,
-                                      &stub->args.ftruncate_cbk.postbuf);
+                                      &stub->args.ftruncate_cbk.postbuf, stub->xdata);
                 else
                         stub->args.ftruncate_cbk.fn (stub->frame,
                                                      stub->frame->cookie,
@@ -3077,7 +3306,7 @@ call_resume_unwind (call_stub_t *stub)
                                                      stub->args.ftruncate_cbk.op_ret,
                                                      stub->args.ftruncate_cbk.op_errno,
                                                      &stub->args.ftruncate_cbk.prebuf,
-                                                     &stub->args.ftruncate_cbk.postbuf);
+                                                     &stub->args.ftruncate_cbk.postbuf, stub->xdata);
                 break;
         }
 
@@ -3087,14 +3316,14 @@ call_resume_unwind (call_stub_t *stub)
                         STACK_UNWIND (stub->frame,
                                       stub->args.fstat_cbk.op_ret,
                                       stub->args.fstat_cbk.op_errno,
-                                      &stub->args.fstat_cbk.buf);
+                                      &stub->args.fstat_cbk.buf, stub->xdata);
                 else
                         stub->args.fstat_cbk.fn (stub->frame,
                                                  stub->frame->cookie,
                                                  stub->frame->this,
                                                  stub->args.fstat_cbk.op_ret,
                                                  stub->args.fstat_cbk.op_errno,
-                                                 &stub->args.fstat_cbk.buf);
+                                                 &stub->args.fstat_cbk.buf, stub->xdata);
 
                 break;
         }
@@ -3105,14 +3334,14 @@ call_resume_unwind (call_stub_t *stub)
                         STACK_UNWIND (stub->frame,
                                       stub->args.lk_cbk.op_ret,
                                       stub->args.lk_cbk.op_errno,
-                                      &stub->args.lk_cbk.lock);
+                                      &stub->args.lk_cbk.lock, stub->xdata);
                 else
                         stub->args.lk_cbk.fn (stub->frame,
                                               stub->frame->cookie,
                                               stub->frame->this,
                                               stub->args.lk_cbk.op_ret,
                                               stub->args.lk_cbk.op_errno,
-                                              &stub->args.lk_cbk.lock);
+                                              &stub->args.lk_cbk.lock, stub->xdata);
                 break;
         }
 
@@ -3121,14 +3350,14 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.inodelk_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.inodelk_cbk.op_ret,
-                                      stub->args.inodelk_cbk.op_errno);
+                                      stub->args.inodelk_cbk.op_errno, stub->xdata);
 
                 else
                         stub->args.inodelk_cbk.fn (stub->frame,
                                                    stub->frame->cookie,
                                                    stub->frame->this,
                                                    stub->args.inodelk_cbk.op_ret,
-                                                   stub->args.inodelk_cbk.op_errno);
+                                                   stub->args.inodelk_cbk.op_errno, stub->xdata);
                 break;
         }
 
@@ -3137,14 +3366,14 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.finodelk_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.finodelk_cbk.op_ret,
-                                      stub->args.finodelk_cbk.op_errno);
+                                      stub->args.finodelk_cbk.op_errno, stub->xdata);
 
                 else
                         stub->args.finodelk_cbk.fn (stub->frame,
                                                     stub->frame->cookie,
                                                     stub->frame->this,
                                                     stub->args.finodelk_cbk.op_ret,
-                                                    stub->args.finodelk_cbk.op_errno);
+                                                    stub->args.finodelk_cbk.op_errno, stub->xdata);
                 break;
         }
 
@@ -3153,14 +3382,14 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.entrylk_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.entrylk_cbk.op_ret,
-                                      stub->args.entrylk_cbk.op_errno);
+                                      stub->args.entrylk_cbk.op_errno, stub->xdata);
 
                 else
                         stub->args.entrylk_cbk.fn (stub->frame,
                                                    stub->frame->cookie,
                                                    stub->frame->this,
                                                    stub->args.entrylk_cbk.op_ret,
-                                                   stub->args.entrylk_cbk.op_errno);
+                                                   stub->args.entrylk_cbk.op_errno, stub->xdata);
                 break;
         }
 
@@ -3169,14 +3398,14 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.fentrylk_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.fentrylk_cbk.op_ret,
-                                      stub->args.fentrylk_cbk.op_errno);
+                                      stub->args.fentrylk_cbk.op_errno, stub->xdata);
 
                 else
                         stub->args.fentrylk_cbk.fn (stub->frame,
                                                     stub->frame->cookie,
                                                     stub->frame->this,
                                                     stub->args.fentrylk_cbk.op_ret,
-                                                    stub->args.fentrylk_cbk.op_errno);
+                                                    stub->args.fentrylk_cbk.op_errno, stub->xdata);
                 break;
         }
 
@@ -3188,7 +3417,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.lookup_cbk.op_errno,
                                       stub->args.lookup_cbk.inode,
                                       &stub->args.lookup_cbk.buf,
-                                      stub->args.lookup_cbk.dict,
+                                      stub->xdata,
                                       &stub->args.lookup_cbk.postparent);
                 else
                         stub->args.lookup_cbk.fn (stub->frame,
@@ -3198,12 +3427,10 @@ call_resume_unwind (call_stub_t *stub)
                                                   stub->args.lookup_cbk.op_errno,
                                                   stub->args.lookup_cbk.inode,
                                                   &stub->args.lookup_cbk.buf,
-                                                  stub->args.lookup_cbk.dict,
+                                                  stub->xdata,
                                                   &stub->args.lookup_cbk.postparent);
                 /* FIXME NULL should not be passed */
 
-                if (stub->args.lookup_cbk.dict)
-                        dict_unref (stub->args.lookup_cbk.dict);
                 if (stub->args.lookup_cbk.inode)
                         inode_unref (stub->args.lookup_cbk.inode);
 
@@ -3217,7 +3444,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.rchecksum_cbk.op_ret,
                                       stub->args.rchecksum_cbk.op_errno,
                                       stub->args.rchecksum_cbk.weak_checksum,
-                                      stub->args.rchecksum_cbk.strong_checksum);
+                                      stub->args.rchecksum_cbk.strong_checksum, stub->xdata);
                 else
                         stub->args.rchecksum_cbk.fn (stub->frame,
                                                      stub->frame->cookie,
@@ -3225,11 +3452,10 @@ call_resume_unwind (call_stub_t *stub)
                                                      stub->args.rchecksum_cbk.op_ret,
                                                      stub->args.rchecksum_cbk.op_errno,
                                                      stub->args.rchecksum_cbk.weak_checksum,
-                                                     stub->args.rchecksum_cbk.strong_checksum);
+                                                     stub->args.rchecksum_cbk.strong_checksum, stub->xdata);
+
                 if (stub->args.rchecksum_cbk.op_ret >= 0)
-                {
                         GF_FREE (stub->args.rchecksum_cbk.strong_checksum);
-                }
 
                 break;
         }
@@ -3240,14 +3466,14 @@ call_resume_unwind (call_stub_t *stub)
                         STACK_UNWIND (stub->frame,
                                       stub->args.readdir_cbk.op_ret,
                                       stub->args.readdir_cbk.op_errno,
-                                      &stub->args.readdir_cbk.entries);
+                                      &stub->args.readdir_cbk.entries, stub->xdata);
                 else
                         stub->args.readdir_cbk.fn (stub->frame,
                                                    stub->frame->cookie,
                                                    stub->frame->this,
                                                    stub->args.readdir_cbk.op_ret,
                                                    stub->args.readdir_cbk.op_errno,
-                                                   &stub->args.readdir_cbk.entries);
+                                                   &stub->args.readdir_cbk.entries, stub->xdata);
 
                 if (stub->args.readdir_cbk.op_ret > 0)
                         gf_dirent_free (&stub->args.readdir_cbk.entries);
@@ -3261,14 +3487,14 @@ call_resume_unwind (call_stub_t *stub)
                         STACK_UNWIND (stub->frame,
                                       stub->args.readdirp_cbk.op_ret,
                                       stub->args.readdirp_cbk.op_errno,
-                                      &stub->args.readdirp_cbk.entries);
+                                      &stub->args.readdirp_cbk.entries, stub->xdata);
                 else
                         stub->args.readdirp_cbk.fn (stub->frame,
                                                     stub->frame->cookie,
                                                     stub->frame->this,
                                                     stub->args.readdirp_cbk.op_ret,
                                                     stub->args.readdirp_cbk.op_errno,
-                                                    &stub->args.readdirp_cbk.entries);
+                                                    &stub->args.readdirp_cbk.entries, stub->xdata);
 
                 if (stub->args.readdirp_cbk.op_ret > 0)
                         gf_dirent_free (&stub->args.readdirp_cbk.entries);
@@ -3281,14 +3507,14 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.xattrop_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.xattrop_cbk.op_ret,
-                                      stub->args.xattrop_cbk.op_errno);
+                                      stub->args.xattrop_cbk.op_errno, stub->xdata);
                 else
                         stub->args.xattrop_cbk.fn (stub->frame,
                                                    stub->frame->cookie,
                                                    stub->frame->this,
                                                    stub->args.xattrop_cbk.op_ret,
                                                    stub->args.xattrop_cbk.op_errno,
-                                                   stub->args.xattrop_cbk.xattr);
+                                                   stub->args.xattrop_cbk.xattr, stub->xdata);
 
                 if (stub->args.xattrop_cbk.xattr)
                         dict_unref (stub->args.xattrop_cbk.xattr);
@@ -3300,14 +3526,14 @@ call_resume_unwind (call_stub_t *stub)
                 if (!stub->args.fxattrop_cbk.fn)
                         STACK_UNWIND (stub->frame,
                                       stub->args.fxattrop_cbk.op_ret,
-                                      stub->args.fxattrop_cbk.op_errno);
+                                      stub->args.fxattrop_cbk.op_errno, stub->xdata);
                 else
                         stub->args.fxattrop_cbk.fn (stub->frame,
                                                     stub->frame->cookie,
                                                     stub->frame->this,
                                                     stub->args.fxattrop_cbk.op_ret,
                                                     stub->args.fxattrop_cbk.op_errno,
-                                                    stub->args.fxattrop_cbk.xattr);
+                                                    stub->args.fxattrop_cbk.xattr, stub->xdata);
 
                 if (stub->args.fxattrop_cbk.xattr)
                         dict_unref (stub->args.fxattrop_cbk.xattr);
@@ -3321,7 +3547,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.setattr_cbk.op_ret,
                                       stub->args.setattr_cbk.op_errno,
                                       &stub->args.setattr_cbk.statpre,
-                                      &stub->args.setattr_cbk.statpost);
+                                      &stub->args.setattr_cbk.statpost, stub->xdata);
                 else
                         stub->args.setattr_cbk.fn (
                                 stub->frame,
@@ -3330,7 +3556,7 @@ call_resume_unwind (call_stub_t *stub)
                                 stub->args.setattr_cbk.op_ret,
                                 stub->args.setattr_cbk.op_errno,
                                 &stub->args.setattr_cbk.statpre,
-                                &stub->args.setattr_cbk.statpost);
+                                &stub->args.setattr_cbk.statpost, stub->xdata);
                 break;
         }
         case GF_FOP_FSETATTR:
@@ -3340,7 +3566,7 @@ call_resume_unwind (call_stub_t *stub)
                                       stub->args.fsetattr_cbk.op_ret,
                                       stub->args.fsetattr_cbk.op_errno,
                                       &stub->args.fsetattr_cbk.statpre,
-                                      &stub->args.fsetattr_cbk.statpost);
+                                      &stub->args.fsetattr_cbk.statpost, stub->xdata);
                 else
                         stub->args.fsetattr_cbk.fn (
                                 stub->frame,
@@ -3349,7 +3575,7 @@ call_resume_unwind (call_stub_t *stub)
                                 stub->args.fsetattr_cbk.op_ret,
                                 stub->args.fsetattr_cbk.op_errno,
                                 &stub->args.fsetattr_cbk.statpre,
-                                &stub->args.fsetattr_cbk.statpost);
+                                &stub->args.fsetattr_cbk.statpost, stub->xdata);
                 break;
         }
         default:
@@ -3368,6 +3594,9 @@ out:
 static void
 call_stub_destroy_wind (call_stub_t *stub)
 {
+        if (stub->xdata)
+                dict_unref (stub->xdata);
+
         switch (stub->fop) {
         case GF_FOP_OPEN:
         {
@@ -3381,8 +3610,6 @@ call_stub_destroy_wind (call_stub_t *stub)
                 loc_wipe (&stub->args.create.loc);
                 if (stub->args.create.fd)
                         fd_unref (stub->args.create.fd);
-                if (stub->args.create.params)
-                        dict_unref (stub->args.create.params);
                 break;
         }
         case GF_FOP_STAT:
@@ -3399,16 +3626,12 @@ call_stub_destroy_wind (call_stub_t *stub)
         case GF_FOP_MKNOD:
         {
                 loc_wipe (&stub->args.mknod.loc);
-                if (stub->args.mknod.params)
-                        dict_unref (stub->args.mknod.params);
         }
         break;
 
         case GF_FOP_MKDIR:
         {
                 loc_wipe (&stub->args.mkdir.loc);
-                if (stub->args.mkdir.params)
-                        dict_unref (stub->args.mkdir.params);
         }
         break;
 
@@ -3428,8 +3651,6 @@ call_stub_destroy_wind (call_stub_t *stub)
         {
                 GF_FREE ((char *)stub->args.symlink.linkname);
                 loc_wipe (&stub->args.symlink.loc);
-                if (stub->args.symlink.params)
-                        dict_unref (stub->args.symlink.params);
         }
         break;
 
@@ -3621,8 +3842,6 @@ call_stub_destroy_wind (call_stub_t *stub)
         case GF_FOP_LOOKUP:
         {
                 loc_wipe (&stub->args.lookup.loc);
-                if (stub->args.lookup.xattr_req)
-                        dict_unref (stub->args.lookup.xattr_req);
                 break;
         }
 
@@ -3645,9 +3864,6 @@ call_stub_destroy_wind (call_stub_t *stub)
                 if (stub->args.readdirp.fd)
                         fd_unref (stub->args.readdirp.fd);
 
-                if (stub->args.readdirp.dict)
-                        dict_unref (stub->args.readdirp.dict);
-
                 break;
         }
 
@@ -3689,6 +3905,9 @@ call_stub_destroy_wind (call_stub_t *stub)
 static void
 call_stub_destroy_unwind (call_stub_t *stub)
 {
+        if (stub->xdata)
+                dict_unref (stub->xdata);
+
         switch (stub->fop) {
         case GF_FOP_OPEN:
         {
@@ -3845,9 +4064,6 @@ call_stub_destroy_unwind (call_stub_t *stub)
         {
                 if (stub->args.lookup_cbk.inode)
                         inode_unref (stub->args.lookup_cbk.inode);
-
-                if (stub->args.lookup_cbk.dict)
-                        dict_unref (stub->args.lookup_cbk.dict);
         }
         break;
 
diff --git a/libglusterfs/src/call-stub.h b/libglusterfs/src/call-stub.h
index 081f6d200f0..85e04ec6967 100644
--- a/libglusterfs/src/call-stub.h
+++ b/libglusterfs/src/call-stub.h
@@ -34,21 +34,20 @@ typedef struct {
 	char wind;
 	call_frame_t *frame;
 	glusterfs_fop_t fop;
-       struct mem_pool *stub_mem_pool;    /* pointer to stub mempool in glusterfs ctx */
+        struct mem_pool *stub_mem_pool; /* pointer to stub mempool in ctx_t */
+        dict_t *xdata;                  /* common accross all the fops */
 
 	union {
 		/* lookup */
 		struct {
 			fop_lookup_t fn;
 			loc_t loc;
-			dict_t *xattr_req;
 		} lookup;
 		struct {
 			fop_lookup_cbk_t fn;
 			int32_t op_ret, op_errno;
 			inode_t *inode;
 			struct iatt buf;
-			dict_t *dict;
                         struct iatt postparent;
 		} lookup_cbk;
 
@@ -130,7 +129,7 @@ typedef struct {
 			loc_t loc;
 			mode_t mode;
 			dev_t rdev;
-                        dict_t *params;
+                        mode_t umask;
 		} mknod;
 		struct {
 			fop_mknod_cbk_t fn;
@@ -146,7 +145,7 @@ typedef struct {
 			fop_mkdir_t fn;
 			loc_t loc;
 			mode_t mode;
-                        dict_t *params;
+                        mode_t umask;
 		} mkdir;
 		struct {
 			fop_mkdir_cbk_t fn;
@@ -161,6 +160,7 @@ typedef struct {
 		struct {
 			fop_unlink_t fn;
 			loc_t loc;
+                        int xflag;
 		} unlink;
 		struct {
 			fop_unlink_cbk_t fn;
@@ -187,7 +187,7 @@ typedef struct {
 			fop_symlink_t fn;
 			const char *linkname;
 			loc_t loc;
-                        dict_t *params;
+                        mode_t umask;
 		} symlink;
 		struct {
 			fop_symlink_cbk_t fn;
@@ -236,7 +236,7 @@ typedef struct {
 			int32_t flags;
 			mode_t mode;
 			fd_t *fd;
-                        dict_t *params;
+                        mode_t umask;
 		} create;
 		struct {
 			fop_create_cbk_t fn;
@@ -254,7 +254,6 @@ typedef struct {
 			loc_t loc;
 			int32_t flags;
 			fd_t *fd;
-                        int32_t wbflags;
 		} open;
 		struct {
 			fop_open_cbk_t fn;
@@ -516,7 +515,6 @@ typedef struct {
 			fd_t *fd;
 			size_t size;
 			off_t off;
-                        dict_t *dict;
 		} readdirp;
 		struct {
 			fop_readdirp_cbk_t fn;
@@ -603,7 +601,7 @@ call_stub_t *
 fop_lookup_stub (call_frame_t *frame,
 		 fop_lookup_t fn,
 		 loc_t *loc,
-		 dict_t *xattr_req);
+		 dict_t *xdata);
 
 call_stub_t *
 fop_lookup_cbk_stub (call_frame_t *frame,
@@ -612,34 +610,34 @@ fop_lookup_cbk_stub (call_frame_t *frame,
 		     int32_t op_errno,
 		     inode_t *inode,
 		     struct iatt *buf,
-                     dict_t *dict,
+                     dict_t *xdata,
                      struct iatt *postparent);
 call_stub_t *
 fop_stat_stub (call_frame_t *frame,
 	       fop_stat_t fn,
-	       loc_t *loc);
+	       loc_t *loc, dict_t *xdata);
 call_stub_t *
 fop_stat_cbk_stub (call_frame_t *frame,
 		   fop_stat_cbk_t fn,
 		   int32_t op_ret,
 		   int32_t op_errno,
-		   struct iatt *buf);
+		   struct iatt *buf, dict_t *xdata);
 call_stub_t *
 fop_fstat_stub (call_frame_t *frame,
 		fop_fstat_t fn,
-		fd_t *fd);
+		fd_t *fd, dict_t *xdata);
 call_stub_t *
 fop_fstat_cbk_stub (call_frame_t *frame,
 		    fop_fstat_cbk_t fn,
 		    int32_t op_ret,
 		    int32_t op_errno,
-		    struct iatt *buf);
+		    struct iatt *buf, dict_t *xdata);
 
 call_stub_t *
 fop_truncate_stub (call_frame_t *frame,
 		   fop_truncate_t fn,
 		   loc_t *loc,
-		   off_t off);
+		   off_t off, dict_t *xdata);
 
 call_stub_t *
 fop_truncate_cbk_stub (call_frame_t *frame,
@@ -647,13 +645,13 @@ fop_truncate_cbk_stub (call_frame_t *frame,
 		       int32_t op_ret,
 		       int32_t op_errno,
 		       struct iatt *prebuf,
-                       struct iatt *postbuf);
+                       struct iatt *postbuf, dict_t *xdata);
 
 call_stub_t *
 fop_ftruncate_stub (call_frame_t *frame,
 		    fop_ftruncate_t fn,
 		    fd_t *fd,
-		    off_t off);
+		    off_t off, dict_t *xdata);
 
 call_stub_t *
 fop_ftruncate_cbk_stub (call_frame_t *frame,
@@ -661,25 +659,25 @@ fop_ftruncate_cbk_stub (call_frame_t *frame,
 			int32_t op_ret,
 			int32_t op_errno,
 			struct iatt *prebuf,
-                        struct iatt *postbuf);
+                        struct iatt *postbuf, dict_t *xdata);
 
 call_stub_t *
 fop_access_stub (call_frame_t *frame,
 		 fop_access_t fn,
 		 loc_t *loc,
-		 int32_t mask);
+		 int32_t mask, dict_t *xdata);
 
 call_stub_t *
 fop_access_cbk_stub (call_frame_t *frame,
 		     fop_access_cbk_t fn,
 		     int32_t op_ret,
-		     int32_t op_errno);
+		     int32_t op_errno, dict_t *xdata);
 
 call_stub_t *
 fop_readlink_stub (call_frame_t *frame,
 		   fop_readlink_t fn,
 		   loc_t *loc,
-		   size_t size);
+		   size_t size, dict_t *xdata);
 
 call_stub_t *
 fop_readlink_cbk_stub (call_frame_t *frame,
@@ -687,11 +685,11 @@ fop_readlink_cbk_stub (call_frame_t *frame,
 		       int32_t op_ret,
 		       int32_t op_errno,
 		       const char *path,
-                       struct iatt *buf);
+                       struct iatt *buf, dict_t *xdata);
 
 call_stub_t *
-fop_mknod_stub (call_frame_t *frame, fop_mknod_t fn,
-		loc_t *loc, mode_t mode, dev_t rdev, dict_t *params);
+fop_mknod_stub (call_frame_t *frame, fop_mknod_t fn, loc_t *loc, mode_t mode,
+                dev_t rdev, mode_t umask, dict_t *xdata);
 
 call_stub_t *
 fop_mknod_cbk_stub (call_frame_t *frame,
@@ -701,11 +699,11 @@ fop_mknod_cbk_stub (call_frame_t *frame,
 		    inode_t *inode,
                     struct iatt *buf,
                     struct iatt *preparent,
-                    struct iatt *postparent);
+                    struct iatt *postparent, dict_t *xdata);
 
 call_stub_t *
-fop_mkdir_stub (call_frame_t *frame, fop_mkdir_t fn,
-		loc_t *loc, mode_t mode, dict_t *params);
+fop_mkdir_stub (call_frame_t *frame, fop_mkdir_t fn, loc_t *loc, mode_t mode,
+                mode_t umask, dict_t *xdata);
 
 call_stub_t *
 fop_mkdir_cbk_stub (call_frame_t *frame,
@@ -715,12 +713,11 @@ fop_mkdir_cbk_stub (call_frame_t *frame,
 		    inode_t *inode,
                     struct iatt *buf,
                     struct iatt *preparent,
-                    struct iatt *postparent);
+                    struct iatt *postparent, dict_t *xdata);
 
 call_stub_t *
-fop_unlink_stub (call_frame_t *frame,
-		 fop_unlink_t fn,
-		 loc_t *loc);
+fop_unlink_stub (call_frame_t *frame, fop_unlink_t fn,
+		 loc_t *loc, int xflag, dict_t *xdata);
 
 call_stub_t *
 fop_unlink_cbk_stub (call_frame_t *frame,
@@ -728,11 +725,11 @@ fop_unlink_cbk_stub (call_frame_t *frame,
 		     int32_t op_ret,
 		     int32_t op_errno,
                      struct iatt *preparent,
-                     struct iatt *postparent);
+                     struct iatt *postparent, dict_t *xdata);
 
 call_stub_t *
 fop_rmdir_stub (call_frame_t *frame, fop_rmdir_t fn,
-		loc_t *loc, int flags);
+		loc_t *loc, int flags, dict_t *xdata);
 
 call_stub_t *
 fop_rmdir_cbk_stub (call_frame_t *frame,
@@ -740,11 +737,11 @@ fop_rmdir_cbk_stub (call_frame_t *frame,
 		    int32_t op_ret,
 		    int32_t op_errno,
                     struct iatt *preparent,
-                    struct iatt *postparent);
+                    struct iatt *postparent, dict_t *xdata);
 
 call_stub_t *
 fop_symlink_stub (call_frame_t *frame, fop_symlink_t fn,
-		  const char *linkname, loc_t *loc, dict_t *params);
+		  const char *linkname, loc_t *loc, mode_t umask, dict_t *xdata);
 
 call_stub_t *
 fop_symlink_cbk_stub (call_frame_t *frame,
@@ -754,13 +751,13 @@ fop_symlink_cbk_stub (call_frame_t *frame,
 		      inode_t *inode,
                       struct iatt *buf,
                       struct iatt *preparent,
-                      struct iatt *postparent);
+                      struct iatt *postparent, dict_t *xdata);
 
 call_stub_t *
 fop_rename_stub (call_frame_t *frame,
 		 fop_rename_t fn,
 		 loc_t *oldloc,
-		 loc_t *newloc);
+		 loc_t *newloc, dict_t *xdata);
 
 call_stub_t *
 fop_rename_cbk_stub (call_frame_t *frame,
@@ -771,13 +768,13 @@ fop_rename_cbk_stub (call_frame_t *frame,
                      struct iatt *preoldparent,
                      struct iatt *postoldparent,
                      struct iatt *prenewparent,
-                     struct iatt *postnewparent);
+                     struct iatt *postnewparent, dict_t *xdata);
 
 call_stub_t *
 fop_link_stub (call_frame_t *frame,
 	       fop_link_t fn,
 	       loc_t *oldloc,
-	       loc_t *newloc);
+	       loc_t *newloc, dict_t *xdata);
 
 call_stub_t *
 fop_link_cbk_stub (call_frame_t *frame,
@@ -787,12 +784,12 @@ fop_link_cbk_stub (call_frame_t *frame,
 		   inode_t *inode,
                    struct iatt *buf,
                    struct iatt *preparent,
-                   struct iatt *postparent);
+                   struct iatt *postparent, dict_t *xdata);
 
 call_stub_t *
 fop_create_stub (call_frame_t *frame, fop_create_t fn,
 		 loc_t *loc, int32_t flags, mode_t mode,
-                 fd_t *fd, dict_t *params);
+                 mode_t umask, fd_t *fd, dict_t *xdata);
 
 call_stub_t *
 fop_create_cbk_stub (call_frame_t *frame,
@@ -803,7 +800,7 @@ fop_create_cbk_stub (call_frame_t *frame,
 		     inode_t *inode,
 		     struct iatt *buf,
                      struct iatt *preparent,
-                     struct iatt *postparent);
+                     struct iatt *postparent, dict_t *xdata);
 
 call_stub_t *
 fop_open_stub (call_frame_t *frame,
@@ -811,21 +808,21 @@ fop_open_stub (call_frame_t *frame,
 	       loc_t *loc,
 	       int32_t flags,
 	       fd_t *fd,
-               int32_t wbflags);
+               dict_t *xdata);
 
 call_stub_t *
 fop_open_cbk_stub (call_frame_t *frame,
 		   fop_open_cbk_t fn,
 		   int32_t op_ret,
 		   int32_t op_errno,
-		   fd_t *fd);
+		   fd_t *fd, dict_t *xdata);
 
 call_stub_t *
 fop_readv_stub (call_frame_t *frame,
 		fop_readv_t fn,
 		fd_t *fd,
 		size_t size,
-		off_t off, uint32_t flags);
+		off_t off, uint32_t flags, dict_t *xdata);
 
 call_stub_t *
 fop_readv_cbk_stub (call_frame_t *frame,
@@ -835,7 +832,7 @@ fop_readv_cbk_stub (call_frame_t *frame,
 		    struct iovec *vector,
 		    int32_t count,
 		    struct iatt *stbuf,
-                    struct iobref *iobref);
+                    struct iobref *iobref, dict_t *xdata);
 
 call_stub_t *
 fop_writev_stub (call_frame_t *frame,
@@ -844,7 +841,7 @@ fop_writev_stub (call_frame_t *frame,
 		 struct iovec *vector,
 		 int32_t count,
 		 off_t off, uint32_t flags,
-                 struct iobref *iobref);
+                 struct iobref *iobref, dict_t *xdata);
 
 call_stub_t *
 fop_writev_cbk_stub (call_frame_t *frame,
@@ -852,24 +849,24 @@ fop_writev_cbk_stub (call_frame_t *frame,
 		     int32_t op_ret,
 		     int32_t op_errno,
                      struct iatt *prebuf,
-                     struct iatt *postbuf);
+                     struct iatt *postbuf, dict_t *xdata);
 
 call_stub_t *
 fop_flush_stub (call_frame_t *frame,
 		fop_flush_t fn,
-		fd_t *fd);
+		fd_t *fd, dict_t *xdata);
 
 call_stub_t *
 fop_flush_cbk_stub (call_frame_t *frame,
 		    fop_flush_cbk_t fn,
 		    int32_t op_ret,
-		    int32_t op_errno);
+		    int32_t op_errno, dict_t *xdata);
 
 call_stub_t *
 fop_fsync_stub (call_frame_t *frame,
 		fop_fsync_t fn,
 		fd_t *fd,
-		int32_t datasync);
+		int32_t datasync, dict_t *xdata);
 
 call_stub_t *
 fop_fsync_cbk_stub (call_frame_t *frame,
@@ -877,177 +874,177 @@ fop_fsync_cbk_stub (call_frame_t *frame,
 		    int32_t op_ret,
 		    int32_t op_errno,
                     struct iatt *prebuf,
-                    struct iatt *postbuf);
+                    struct iatt *postbuf, dict_t *xdata);
 
 call_stub_t *
 fop_opendir_stub (call_frame_t *frame,
 		  fop_opendir_t fn,
-		  loc_t *loc, fd_t *fd);
+		  loc_t *loc, fd_t *fd, dict_t *xdata);
 
 call_stub_t *
 fop_opendir_cbk_stub (call_frame_t *frame,
 		      fop_opendir_cbk_t fn,
 		      int32_t op_ret,
 		      int32_t op_errno,
-		      fd_t *fd);
+		      fd_t *fd, dict_t *xdata);
 
 call_stub_t *
 fop_fsyncdir_stub (call_frame_t *frame,
 		   fop_fsyncdir_t fn,
 		   fd_t *fd,
-		   int32_t datasync);
+		   int32_t datasync, dict_t *xdata);
 
 call_stub_t *
 fop_fsyncdir_cbk_stub (call_frame_t *frame,
 		       fop_fsyncdir_cbk_t fn,
 		       int32_t op_ret,
-		       int32_t op_errno);
+		       int32_t op_errno, dict_t *xdata);
 
 call_stub_t *
 fop_statfs_stub (call_frame_t *frame,
 		 fop_statfs_t fn,
-		 loc_t *loc);
+		 loc_t *loc, dict_t *xdata);
 
 call_stub_t *
 fop_statfs_cbk_stub (call_frame_t *frame,
 		     fop_statfs_cbk_t fn,
 		     int32_t op_ret,
 		     int32_t op_errno,
-		     struct statvfs *buf);
+		     struct statvfs *buf, dict_t *xdata);
 
 call_stub_t *
 fop_setxattr_stub (call_frame_t *frame,
 		   fop_setxattr_t fn,
 		   loc_t *loc,
 		   dict_t *dict,
-		   int32_t flags);
+		   int32_t flags, dict_t *xdata);
 
 call_stub_t *
 fop_setxattr_cbk_stub (call_frame_t *frame,
 		       fop_setxattr_cbk_t fn,
 		       int32_t op_ret,
-		       int32_t op_errno);
+		       int32_t op_errno, dict_t *xdata);
 
 call_stub_t *
 fop_getxattr_stub (call_frame_t *frame,
 		   fop_getxattr_t fn,
 		   loc_t *loc,
-		   const char *name);
+		   const char *name, dict_t *xdata);
 
 call_stub_t *
 fop_getxattr_cbk_stub (call_frame_t *frame,
 		       fop_getxattr_cbk_t fn,
 		       int32_t op_ret,
 		       int32_t op_errno,
-		       dict_t *value);
+		       dict_t *value, dict_t *xdata);
 
 call_stub_t *
 fop_fsetxattr_stub (call_frame_t *frame,
                     fop_fsetxattr_t fn,
                     fd_t *fd,
                     dict_t *dict,
-                    int32_t flags);
+                    int32_t flags, dict_t *xdata);
 
 call_stub_t *
 fop_fsetxattr_cbk_stub (call_frame_t *frame,
                         fop_fsetxattr_cbk_t fn,
                         int32_t op_ret,
-                        int32_t op_errno);
+                        int32_t op_errno, dict_t *xdata);
 
 call_stub_t *
 fop_fgetxattr_stub (call_frame_t *frame,
                     fop_fgetxattr_t fn,
                     fd_t *fd,
-                    const char *name);
+                    const char *name, dict_t *xdata);
 
 call_stub_t *
 fop_fgetxattr_cbk_stub (call_frame_t *frame,
                         fop_fgetxattr_cbk_t fn,
                         int32_t op_ret,
                         int32_t op_errno,
-                        dict_t *value);
+                        dict_t *value, dict_t *xdata);
 
 call_stub_t *
 fop_removexattr_stub (call_frame_t *frame,
 		      fop_removexattr_t fn,
 		      loc_t *loc,
-		      const char *name);
+		      const char *name, dict_t *xdata);
 
 call_stub_t *
 fop_removexattr_cbk_stub (call_frame_t *frame,
 			  fop_removexattr_cbk_t fn,
 			  int32_t op_ret,
-			  int32_t op_errno);
+			  int32_t op_errno, dict_t *xdata);
 
 
 call_stub_t *
 fop_fremovexattr_stub (call_frame_t *frame,
                        fop_fremovexattr_t fn,
                        fd_t *fd,
-                       const char *name);
+                       const char *name, dict_t *xdata);
 
 call_stub_t *
 fop_fremovexattr_cbk_stub (call_frame_t *frame,
                            fop_fremovexattr_cbk_t fn,
                            int32_t op_ret,
-                           int32_t op_errno);
+                           int32_t op_errno, dict_t *xdata);
 
 call_stub_t *
 fop_lk_stub (call_frame_t *frame,
 	     fop_lk_t fn,
 	     fd_t *fd,
 	     int32_t cmd,
-	     struct gf_flock *lock);
+	     struct gf_flock *lock, dict_t *xdata);
 
 call_stub_t *
 fop_lk_cbk_stub (call_frame_t *frame,
 		 fop_lk_cbk_t fn,
 		 int32_t op_ret,
 		 int32_t op_errno,
-		 struct gf_flock *lock);
+		 struct gf_flock *lock, dict_t *xdata);
 
 call_stub_t *
 fop_inodelk_stub (call_frame_t *frame, fop_inodelk_t fn,
 		  const char *volume, loc_t *loc, int32_t cmd,
-                  struct gf_flock *lock);
+                  struct gf_flock *lock, dict_t *xdata);
 
 call_stub_t *
 fop_finodelk_stub (call_frame_t *frame, fop_finodelk_t fn,
 		   const char *volume, fd_t *fd, int32_t cmd,
-                   struct gf_flock *lock);
+                   struct gf_flock *lock, dict_t *xdata);
 
 call_stub_t *
 fop_entrylk_stub (call_frame_t *frame, fop_entrylk_t fn,
 		  const char *volume, loc_t *loc, const char *basename,
-		  entrylk_cmd cmd, entrylk_type type);
+		  entrylk_cmd cmd, entrylk_type type, dict_t *xdata);
 
 call_stub_t *
 fop_fentrylk_stub (call_frame_t *frame, fop_fentrylk_t fn,
 		   const char *volume, fd_t *fd, const char *basename,
-		   entrylk_cmd cmd, entrylk_type type);
+		   entrylk_cmd cmd, entrylk_type type, dict_t *xdata);
 
 call_stub_t *
 fop_inodelk_cbk_stub (call_frame_t *frame, fop_inodelk_cbk_t fn,
-		      int32_t op_ret, int32_t op_errno);
+		      int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 call_stub_t *
 fop_finodelk_cbk_stub (call_frame_t *frame, fop_inodelk_cbk_t fn,
-		       int32_t op_ret, int32_t op_errno);
+		       int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 call_stub_t *
 fop_entrylk_cbk_stub (call_frame_t *frame, fop_entrylk_cbk_t fn,
-		      int32_t op_ret, int32_t op_errno);
+		      int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 call_stub_t *
 fop_fentrylk_cbk_stub (call_frame_t *frame, fop_entrylk_cbk_t fn,
-		       int32_t op_ret, int32_t op_errno);
+		       int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 call_stub_t *
 fop_readdir_stub (call_frame_t *frame,
 		  fop_readdir_t fn,
 		  fd_t *fd,
 		  size_t size,
-		  off_t off);
+		  off_t off, dict_t *xdata);
 
 call_stub_t *
 fop_readdirp_stub (call_frame_t *frame,
@@ -1055,27 +1052,27 @@ fop_readdirp_stub (call_frame_t *frame,
 		   fd_t *fd,
 		   size_t size,
 		   off_t off,
-                   dict_t *dict);
+                   dict_t *xdata);
 
 call_stub_t *
 fop_readdirp_cbk_stub (call_frame_t *frame,
 		       fop_readdir_cbk_t fn,
 		       int32_t op_ret,
 		       int32_t op_errno,
-		       gf_dirent_t *entries);
+		       gf_dirent_t *entries, dict_t *xdata);
 
 call_stub_t *
 fop_readdir_cbk_stub (call_frame_t *frame,
 		      fop_readdir_cbk_t fn,
 		      int32_t op_ret,
 		      int32_t op_errno,
-		      gf_dirent_t *entries);
+		      gf_dirent_t *entries, dict_t *xdata);
 
 call_stub_t *
 fop_rchecksum_stub (call_frame_t *frame,
                     fop_rchecksum_t fn,
                     fd_t *fd, off_t offset,
-                    int32_t len);
+                    int32_t len, dict_t *xdata);
 
 call_stub_t *
 fop_rchecksum_cbk_stub (call_frame_t *frame,
@@ -1083,40 +1080,40 @@ fop_rchecksum_cbk_stub (call_frame_t *frame,
                         int32_t op_ret,
                         int32_t op_errno,
                         uint32_t weak_checksum,
-                        uint8_t *strong_checksum);
+                        uint8_t *strong_checksum, dict_t *xdata);
 
 call_stub_t *
 fop_xattrop_stub (call_frame_t *frame,
 		  fop_xattrop_t fn,
 		  loc_t *loc,
 		  gf_xattrop_flags_t optype,
-		  dict_t *xattr);
+		  dict_t *xattr, dict_t *xdata);
 
 call_stub_t *
 fop_xattrop_stub_cbk_stub (call_frame_t *frame,
 			   fop_xattrop_cbk_t fn,
 			   int32_t op_ret,
-			   int32_t op_errno);
+			   int32_t op_errno, dict_t *xdata);
 
 call_stub_t *
 fop_fxattrop_stub (call_frame_t *frame,
 		   fop_fxattrop_t fn,
 		   fd_t *fd,
 		   gf_xattrop_flags_t optype,
-		   dict_t *xattr);
+		   dict_t *xattr, dict_t *xdata);
 
 call_stub_t *
 fop_fxattrop_stub_cbk_stub (call_frame_t *frame,
 			    fop_xattrop_cbk_t fn,
 			    int32_t op_ret,
-			    int32_t op_errno);
+			    int32_t op_errno, dict_t *xdata);
 
 call_stub_t *
 fop_setattr_stub (call_frame_t *frame,
                   fop_setattr_t fn,
                   loc_t *loc,
                   struct iatt *stbuf,
-                  int32_t valid);
+                  int32_t valid, dict_t *xdata);
 
 call_stub_t *
 fop_setattr_cbk_stub (call_frame_t *frame,
@@ -1124,14 +1121,14 @@ fop_setattr_cbk_stub (call_frame_t *frame,
                       int32_t op_ret,
                       int32_t op_errno,
                       struct iatt *statpre,
-                      struct iatt *statpost);
+                      struct iatt *statpost, dict_t *xdata);
 
 call_stub_t *
 fop_fsetattr_stub (call_frame_t *frame,
                    fop_fsetattr_t fn,
                    fd_t *fd,
                    struct iatt *stbuf,
-                   int32_t valid);
+                   int32_t valid, dict_t *xdata);
 
 call_stub_t *
 fop_fsetattr_cbk_stub (call_frame_t *frame,
@@ -1139,7 +1136,7 @@ fop_fsetattr_cbk_stub (call_frame_t *frame,
                        int32_t op_ret,
                        int32_t op_errno,
                        struct iatt *statpre,
-                       struct iatt *statpost);
+                       struct iatt *statpost, dict_t *xdata);
 
 void call_resume (call_stub_t *stub);
 void call_stub_destroy (call_stub_t *stub);
diff --git a/libglusterfs/src/defaults.c b/libglusterfs/src/defaults.c
index 387e910175b..a3f506d9bf5 100644
--- a/libglusterfs/src/defaults.c
+++ b/libglusterfs/src/defaults.c
@@ -41,18 +41,19 @@
 int32_t
 default_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int32_t op_ret, int32_t op_errno, inode_t *inode,
-                    struct iatt *buf, dict_t *dict, struct iatt *postparent)
+                    struct iatt *buf, dict_t *xdata, struct iatt *postparent)
 {
         STACK_UNWIND_STRICT (lookup, frame, op_ret, op_errno, inode, buf,
-                             dict, postparent);
+                             xdata, postparent);
         return 0;
 }
 
 int32_t
 default_stat_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                  int32_t op_ret, int32_t op_errno, struct iatt *buf)
+                  int32_t op_ret, int32_t op_errno, struct iatt *buf,
+                  dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (stat, frame, op_ret, op_errno, buf);
+        STACK_UNWIND_STRICT (stat, frame, op_ret, op_errno, buf, xdata);
         return 0;
 }
 
@@ -60,37 +61,41 @@ default_stat_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 int32_t
 default_truncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                       int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                      struct iatt *postbuf)
+                      struct iatt *postbuf,
+                      dict_t *xdata)
 {
         STACK_UNWIND_STRICT (truncate, frame, op_ret, op_errno, prebuf,
-                             postbuf);
+                             postbuf, xdata);
         return 0;
 }
 
 int32_t
 default_ftruncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                        int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                       struct iatt *postbuf)
+                       struct iatt *postbuf,
+                       dict_t *xdata)
 {
         STACK_UNWIND_STRICT (ftruncate, frame, op_ret, op_errno, prebuf,
-                             postbuf);
+                             postbuf, xdata);
         return 0;
 }
 
 int32_t
 default_access_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                    int32_t op_ret, int32_t op_errno)
+                    int32_t op_ret, int32_t op_errno,
+                    dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (access, frame, op_ret, op_errno);
+        STACK_UNWIND_STRICT (access, frame, op_ret, op_errno, xdata);
         return 0;
 }
 
 int32_t
 default_readlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                       int32_t op_ret, int32_t op_errno, const char *path,
-                      struct iatt *buf)
+                      struct iatt *buf, dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (readlink, frame, op_ret, op_errno, path, buf);
+        STACK_UNWIND_STRICT (readlink, frame, op_ret, op_errno, path, buf,
+                             xdata);
         return 0;
 }
 
@@ -99,10 +104,10 @@ int32_t
 default_mknod_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno, inode_t *inode,
                    struct iatt *buf, struct iatt *preparent,
-                   struct iatt *postparent)
+                   struct iatt *postparent, dict_t *xdata)
 {
         STACK_UNWIND_STRICT (mknod, frame, op_ret, op_errno, inode,
-                             buf, preparent, postparent);
+                             buf, preparent, postparent, xdata);
         return 0;
 }
 
@@ -110,30 +115,31 @@ int32_t
 default_mkdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno, inode_t *inode,
                    struct iatt *buf, struct iatt *preparent,
-                   struct iatt *postparent)
+                   struct iatt *postparent, dict_t *xdata)
 {
         STACK_UNWIND_STRICT (mkdir, frame, op_ret, op_errno, inode,
-                             buf, preparent, postparent);
+                             buf, preparent, postparent, xdata);
         return 0;
 }
 
 int32_t
 default_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int32_t op_ret, int32_t op_errno, struct iatt *preparent,
-                    struct iatt *postparent)
+                    struct iatt *postparent, dict_t *xdata)
 {
         STACK_UNWIND_STRICT (unlink, frame, op_ret, op_errno, preparent,
-                             postparent);
+                             postparent, xdata);
         return 0;
 }
 
 int32_t
 default_rmdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno, struct iatt *preparent,
-                   struct iatt *postparent)
+                   struct iatt *postparent,
+                   dict_t *xdata)
 {
         STACK_UNWIND_STRICT (rmdir, frame, op_ret, op_errno, preparent,
-                             postparent);
+                             postparent, xdata);
         return 0;
 }
 
@@ -142,10 +148,10 @@ int32_t
 default_symlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                      int32_t op_ret, int32_t op_errno, inode_t *inode,
                      struct iatt *buf, struct iatt *preparent,
-                     struct iatt *postparent)
+                     struct iatt *postparent, dict_t *xdata)
 {
         STACK_UNWIND_STRICT (symlink, frame, op_ret, op_errno, inode, buf,
-                             preparent, postparent);
+                             preparent, postparent, xdata);
         return 0;
 }
 
@@ -154,10 +160,11 @@ int32_t
 default_rename_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int32_t op_ret, int32_t op_errno, struct iatt *buf,
                     struct iatt *preoldparent, struct iatt *postoldparent,
-                    struct iatt *prenewparent, struct iatt *postnewparent)
+                    struct iatt *prenewparent, struct iatt *postnewparent,
+                    dict_t *xdata)
 {
         STACK_UNWIND_STRICT (rename, frame, op_ret, op_errno, buf, preoldparent,
-                             postoldparent, prenewparent, postnewparent);
+                             postoldparent, prenewparent, postnewparent, xdata);
         return 0;
 }
 
@@ -166,10 +173,11 @@ int32_t
 default_link_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                   int32_t op_ret, int32_t op_errno, inode_t *inode,
                   struct iatt *buf, struct iatt *preparent,
-                  struct iatt *postparent)
+                  struct iatt *postparent,
+                  dict_t *xdata)
 {
         STACK_UNWIND_STRICT (link, frame, op_ret, op_errno, inode, buf,
-                             preparent, postparent);
+                             preparent, postparent, xdata);
         return 0;
 }
 
@@ -178,28 +186,31 @@ int32_t
 default_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int32_t op_ret, int32_t op_errno, fd_t *fd, inode_t *inode,
                     struct iatt *buf, struct iatt *preparent,
-                    struct iatt *postparent)
+                    struct iatt *postparent,
+                    dict_t *xdata)
 {
         STACK_UNWIND_STRICT (create, frame, op_ret, op_errno, fd, inode, buf,
-                             preparent, postparent);
+                             preparent, postparent, xdata);
         return 0;
 }
 
 int32_t
 default_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                  int32_t op_ret, int32_t op_errno, fd_t *fd)
+                  int32_t op_ret, int32_t op_errno, fd_t *fd,
+                  dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (open, frame, op_ret, op_errno, fd);
+        STACK_UNWIND_STRICT (open, frame, op_ret, op_errno, fd, xdata);
         return 0;
 }
 
 int32_t
 default_readv_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno, struct iovec *vector,
-                   int32_t count, struct iatt *stbuf, struct iobref *iobref)
+                   int32_t count, struct iatt *stbuf, struct iobref *iobref,
+                   dict_t *xdata)
 {
         STACK_UNWIND_STRICT (readv, frame, op_ret, op_errno, vector, count,
-                             stbuf, iobref);
+                             stbuf, iobref, xdata);
         return 0;
 }
 
@@ -207,18 +218,20 @@ default_readv_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 int32_t
 default_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                    struct iatt *postbuf)
+                    struct iatt *postbuf,
+                    dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (writev, frame, op_ret, op_errno, prebuf, postbuf);
+        STACK_UNWIND_STRICT (writev, frame, op_ret, op_errno, prebuf, postbuf, xdata);
         return 0;
 }
 
 
 int32_t
 default_flush_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                   int32_t op_ret, int32_t op_errno)
+                   int32_t op_ret, int32_t op_errno,
+                   dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (flush, frame, op_ret, op_errno);
+        STACK_UNWIND_STRICT (flush, frame, op_ret, op_errno, xdata);
         return 0;
 }
 
@@ -227,59 +240,67 @@ default_flush_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 int32_t
 default_fsync_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                   struct iatt *postbuf)
+                   struct iatt *postbuf,
+                   dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fsync, frame, op_ret, op_errno, prebuf, postbuf);
+        STACK_UNWIND_STRICT (fsync, frame, op_ret, op_errno, prebuf, postbuf,
+                             xdata);
         return 0;
 }
 
 int32_t
 default_fstat_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                   int32_t op_ret, int32_t op_errno, struct iatt *buf)
+                   int32_t op_ret, int32_t op_errno, struct iatt *buf,
+                   dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fstat, frame, op_ret, op_errno, buf);
+        STACK_UNWIND_STRICT (fstat, frame, op_ret, op_errno, buf, xdata);
         return 0;
 }
 
 int32_t
 default_opendir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno, fd_t *fd)
+                     int32_t op_ret, int32_t op_errno, fd_t *fd,
+                     dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (opendir, frame, op_ret, op_errno, fd);
+        STACK_UNWIND_STRICT (opendir, frame, op_ret, op_errno, fd, xdata);
         return 0;
 }
 
 int32_t
 default_fsyncdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno)
+                      int32_t op_ret, int32_t op_errno,
+                      dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fsyncdir, frame, op_ret, op_errno);
+        STACK_UNWIND_STRICT (fsyncdir, frame, op_ret, op_errno, xdata);
         return 0;
 }
 
 int32_t
 default_statfs_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                    int32_t op_ret, int32_t op_errno, struct statvfs *buf)
+                    int32_t op_ret, int32_t op_errno, struct statvfs *buf,
+                    dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (statfs, frame, op_ret, op_errno, buf);
+        STACK_UNWIND_STRICT (statfs, frame, op_ret, op_errno, buf, xdata);
         return 0;
 }
 
 
 int32_t
 default_setxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno)
+                      int32_t op_ret, int32_t op_errno,
+                      dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (setxattr, frame, op_ret, op_errno);
+        STACK_UNWIND_STRICT (setxattr, frame, op_ret, op_errno, xdata);
         return 0;
 }
 
 
 int32_t
 default_fsetxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                       int32_t op_ret, int32_t op_errno)
+                       int32_t op_ret, int32_t op_errno,
+                       dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fsetxattr, frame, op_ret, op_errno);
+        STACK_UNWIND_STRICT (fsetxattr, frame, op_ret, op_errno, xdata);
         return 0;
 }
 
@@ -287,93 +308,104 @@ default_fsetxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
 int32_t
 default_fgetxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                       int32_t op_ret, int32_t op_errno, dict_t *dict)
+                       int32_t op_ret, int32_t op_errno, dict_t *dict,
+                       dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fgetxattr, frame, op_ret, op_errno, dict);
+        STACK_UNWIND_STRICT (fgetxattr, frame, op_ret, op_errno, dict, xdata);
         return 0;
 }
 
 
 int32_t
 default_getxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno, dict_t *dict)
+                      int32_t op_ret, int32_t op_errno, dict_t *dict,
+                      dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (getxattr, frame, op_ret, op_errno, dict);
+        STACK_UNWIND_STRICT (getxattr, frame, op_ret, op_errno, dict, xdata);
         return 0;
 }
 
 int32_t
 default_xattrop_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno, dict_t *dict)
+                     int32_t op_ret, int32_t op_errno, dict_t *dict,
+                     dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (xattrop, frame, op_ret, op_errno, dict);
+        STACK_UNWIND_STRICT (xattrop, frame, op_ret, op_errno, dict, xdata);
         return 0;
 }
 
 int32_t
 default_fxattrop_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno, dict_t *dict)
+                      int32_t op_ret, int32_t op_errno, dict_t *dict,
+                      dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fxattrop, frame, op_ret, op_errno, dict);
+        STACK_UNWIND_STRICT (fxattrop, frame, op_ret, op_errno, dict, xdata);
         return 0;
 }
 
 
 int32_t
 default_removexattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                         int32_t op_ret, int32_t op_errno)
+                         int32_t op_ret, int32_t op_errno,
+                         dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (removexattr, frame, op_ret, op_errno);
+        STACK_UNWIND_STRICT (removexattr, frame, op_ret, op_errno, xdata);
         return 0;
 }
 
 
 int32_t
 default_fremovexattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                          int32_t op_ret, int32_t op_errno)
+                          int32_t op_ret, int32_t op_errno,
+                          dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fremovexattr, frame, op_ret, op_errno);
+        STACK_UNWIND_STRICT (fremovexattr, frame, op_ret, op_errno, xdata);
         return 0;
 }
 
 int32_t
 default_lk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                int32_t op_ret, int32_t op_errno, struct gf_flock *lock)
+                int32_t op_ret, int32_t op_errno, struct gf_flock *lock,
+                dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (lk, frame, op_ret, op_errno, lock);
+        STACK_UNWIND_STRICT (lk, frame, op_ret, op_errno, lock, xdata);
         return 0;
 }
 
 int32_t
 default_inodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno)
+                     int32_t op_ret, int32_t op_errno,
+                     dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (inodelk, frame, op_ret, op_errno);
+        STACK_UNWIND_STRICT (inodelk, frame, op_ret, op_errno, xdata);
         return 0;
 }
 
 
 int32_t
 default_finodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno)
+                      int32_t op_ret, int32_t op_errno,
+                      dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (finodelk, frame, op_ret, op_errno);
+        STACK_UNWIND_STRICT (finodelk, frame, op_ret, op_errno, xdata);
         return 0;
 }
 
 int32_t
 default_entrylk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno)
+                     int32_t op_ret, int32_t op_errno,
+                     dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (entrylk, frame, op_ret, op_errno);
+        STACK_UNWIND_STRICT (entrylk, frame, op_ret, op_errno, xdata);
         return 0;
 }
 
 int32_t
 default_fentrylk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno)
+                      int32_t op_ret, int32_t op_errno,
+                      dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (fentrylk, frame, op_ret, op_errno);
+        STACK_UNWIND_STRICT (fentrylk, frame, op_ret, op_errno, xdata);
         return 0;
 }
 
@@ -381,48 +413,53 @@ default_fentrylk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 int32_t
 default_rchecksum_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                        int32_t op_ret, int32_t op_errno, uint32_t weak_checksum,
-                       uint8_t *strong_checksum)
+                       uint8_t *strong_checksum,
+                       dict_t *xdata)
 {
         STACK_UNWIND_STRICT (rchecksum, frame, op_ret, op_errno, weak_checksum,
-                             strong_checksum);
+                             strong_checksum, xdata);
         return 0;
 }
 
 
 int32_t
 default_readdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno, gf_dirent_t *entries)
+                     int32_t op_ret, int32_t op_errno, gf_dirent_t *entries,
+                     dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (readdir, frame, op_ret, op_errno, entries);
+        STACK_UNWIND_STRICT (readdir, frame, op_ret, op_errno, entries, xdata);
         return 0;
 }
 
 
 int32_t
 default_readdirp_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno, gf_dirent_t *entries)
+                      int32_t op_ret, int32_t op_errno, gf_dirent_t *entries,
+                      dict_t *xdata)
 {
-        STACK_UNWIND_STRICT (readdirp, frame, op_ret, op_errno, entries);
+        STACK_UNWIND_STRICT (readdirp, frame, op_ret, op_errno, entries, xdata);
         return 0;
 }
 
 int32_t
 default_setattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                      int32_t op_ret, int32_t op_errno, struct iatt *statpre,
-                     struct iatt *statpost)
+                     struct iatt *statpost,
+                     dict_t *xdata)
 {
         STACK_UNWIND_STRICT (setattr, frame, op_ret, op_errno, statpre,
-                             statpost);
+                             statpost, xdata);
         return 0;
 }
 
 int32_t
 default_fsetattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                       int32_t op_ret, int32_t op_errno, struct iatt *statpre,
-                      struct iatt *statpost)
+                      struct iatt *statpost,
+                      dict_t *xdata)
 {
         STACK_UNWIND_STRICT (fsetattr, frame, op_ret, op_errno, statpre,
-                             statpost);
+                             statpost, xdata);
         return 0;
 }
 
@@ -438,266 +475,271 @@ default_getspec_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
 int32_t
 default_fgetxattr_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                          const char *name)
+                          const char *name, dict_t *xdata)
 {
         STACK_WIND (frame, default_fgetxattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fgetxattr, fd, name);
+                    FIRST_CHILD(this)->fops->fgetxattr, fd, name, xdata);
         return 0;
 }
 
 int32_t
 default_fsetxattr_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                          dict_t *dict, int32_t flags)
+                          dict_t *dict, int32_t flags, dict_t *xdata)
 {
         STACK_WIND (frame, default_fsetxattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fsetxattr, fd, dict, flags);
+                    FIRST_CHILD(this)->fops->fsetxattr, fd, dict, flags, xdata);
         return 0;
 }
 
 int32_t
 default_setxattr_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                         dict_t *dict, int32_t flags)
+                         dict_t *dict, int32_t flags, dict_t *xdata)
 {
         STACK_WIND (frame, default_setxattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->setxattr, loc, dict, flags);
+                    FIRST_CHILD(this)->fops->setxattr, loc, dict, flags, xdata);
         return 0;
 }
 
 int32_t
-default_statfs_resume (call_frame_t *frame, xlator_t *this, loc_t *loc)
+default_statfs_resume (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata)
 {
         STACK_WIND (frame, default_statfs_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->statfs, loc);
+                    FIRST_CHILD(this)->fops->statfs, loc, xdata);
         return 0;
 }
 
 int32_t
 default_fsyncdir_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                         int32_t flags)
+                         int32_t flags, dict_t *xdata)
 {
         STACK_WIND (frame, default_fsyncdir_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fsyncdir, fd, flags);
+                    FIRST_CHILD(this)->fops->fsyncdir, fd, flags, xdata);
         return 0;
 }
 
 int32_t
 default_opendir_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                        fd_t *fd)
+                        fd_t *fd, dict_t *xdata)
 {
         STACK_WIND (frame, default_opendir_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->opendir, loc, fd);
+                    FIRST_CHILD(this)->fops->opendir, loc, fd, xdata);
         return 0;
 }
 
 int32_t
-default_fstat_resume (call_frame_t *frame, xlator_t *this, fd_t *fd)
+default_fstat_resume (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata)
 {
         STACK_WIND (frame, default_fstat_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fstat, fd);
+                    FIRST_CHILD(this)->fops->fstat, fd, xdata);
         return 0;
 }
 
 int32_t
 default_fsync_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                      int32_t flags)
+                      int32_t flags, dict_t *xdata)
 {
         STACK_WIND (frame, default_fsync_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fsync, fd, flags);
+                    FIRST_CHILD(this)->fops->fsync, fd, flags, xdata);
         return 0;
 }
 
 int32_t
-default_flush_resume (call_frame_t *frame, xlator_t *this, fd_t *fd)
+default_flush_resume (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata)
 {
         STACK_WIND (frame, default_flush_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->flush, fd);
+                    FIRST_CHILD(this)->fops->flush, fd, xdata);
         return 0;
 }
 
 int32_t
 default_writev_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
                        struct iovec *vector, int32_t count, off_t off,
-                       uint32_t flags, struct iobref *iobref)
+                       uint32_t flags, struct iobref *iobref, dict_t *xdata)
 {
         STACK_WIND (frame, default_writev_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->writev, fd, vector, count, off,
-                    flags, iobref);
+                    flags, iobref, xdata);
         return 0;
 }
 
 int32_t
 default_readv_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                      size_t size, off_t offset, uint32_t flags)
+                      size_t size, off_t offset, uint32_t flags, dict_t *xdata)
 {
         STACK_WIND (frame, default_readv_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readv, fd, size, offset, flags);
+                    FIRST_CHILD(this)->fops->readv, fd, size, offset, flags, xdata);
         return 0;
 }
 
 
 int32_t
 default_open_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                     int32_t flags, fd_t *fd, int32_t wbflags)
+                     int32_t flags, fd_t *fd, dict_t *xdata)
 {
         STACK_WIND (frame, default_open_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->open, loc, flags, fd, wbflags);
+                    FIRST_CHILD(this)->fops->open, loc, flags, fd, xdata);
         return 0;
 }
 
 int32_t
 default_create_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                       int32_t flags, mode_t mode, fd_t *fd, dict_t *params)
+                       int32_t flags, mode_t mode, mode_t umask, fd_t *fd,
+                       dict_t *xdata)
 {
         STACK_WIND (frame, default_create_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->create, loc, flags, mode, fd,
-                    params);
+                    FIRST_CHILD(this)->fops->create, loc, flags, mode, umask,
+                    fd, xdata);
         return 0;
 }
 
 int32_t
 default_link_resume (call_frame_t *frame, xlator_t *this, loc_t *oldloc,
-                     loc_t *newloc)
+                     loc_t *newloc, dict_t *xdata)
 {
         STACK_WIND (frame, default_link_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->link, oldloc, newloc);
+                    FIRST_CHILD(this)->fops->link, oldloc, newloc, xdata);
         return 0;
 }
 
 int32_t
 default_rename_resume (call_frame_t *frame, xlator_t *this, loc_t *oldloc,
-                       loc_t *newloc)
+                       loc_t *newloc, dict_t *xdata)
 {
         STACK_WIND (frame, default_rename_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->rename, oldloc, newloc);
+                    FIRST_CHILD(this)->fops->rename, oldloc, newloc, xdata);
         return 0;
 }
 
 
 int
 default_symlink_resume (call_frame_t *frame, xlator_t *this,
-                        const char *linkpath, loc_t *loc, dict_t *params)
+                        const char *linkpath, loc_t *loc, mode_t umask,
+                        dict_t *xdata)
 {
         STACK_WIND (frame, default_symlink_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->symlink, linkpath, loc, params);
+                    FIRST_CHILD(this)->fops->symlink, linkpath, loc, umask,
+                    xdata);
         return 0;
 }
 
 int32_t
 default_rmdir_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                      int flags)
+                      int flags, dict_t *xdata)
 {
         STACK_WIND (frame, default_rmdir_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->rmdir, loc, flags);
+                    FIRST_CHILD(this)->fops->rmdir, loc, flags, xdata);
         return 0;
 }
 
 int32_t
-default_unlink_resume (call_frame_t *frame, xlator_t *this, loc_t *loc)
+default_unlink_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
+                       int xflag, dict_t *xdata)
 {
         STACK_WIND (frame, default_unlink_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->unlink, loc);
+                    FIRST_CHILD(this)->fops->unlink, loc, xflag, xdata);
         return 0;
 }
 
 int
 default_mkdir_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                      mode_t mode, dict_t *params)
+                      mode_t mode, mode_t umask, dict_t *xdata)
 {
         STACK_WIND (frame, default_mkdir_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->mkdir, loc, mode, params);
+                    FIRST_CHILD(this)->fops->mkdir, loc, mode, umask, xdata);
         return 0;
 }
 
 
 int
 default_mknod_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                      mode_t mode, dev_t rdev, dict_t *parms)
+                      mode_t mode, dev_t rdev, mode_t umask, dict_t *xdata)
 {
         STACK_WIND (frame, default_mknod_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->mknod, loc, mode, rdev, parms);
+                    FIRST_CHILD(this)->fops->mknod, loc, mode, rdev, umask,
+                    xdata);
         return 0;
 }
 
 int32_t
 default_readlink_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                         size_t size)
+                         size_t size, dict_t *xdata)
 {
         STACK_WIND (frame, default_readlink_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readlink, loc, size);
+                    FIRST_CHILD(this)->fops->readlink, loc, size, xdata);
         return 0;
 }
 
 
 int32_t
 default_access_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                       int32_t mask)
+                       int32_t mask, dict_t *xdata)
 {
         STACK_WIND (frame, default_access_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->access, loc, mask);
+                    FIRST_CHILD(this)->fops->access, loc, mask, xdata);
         return 0;
 }
 
 int32_t
 default_ftruncate_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                          off_t offset)
+                          off_t offset, dict_t *xdata)
 {
         STACK_WIND (frame, default_ftruncate_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->ftruncate, fd, offset);
+                    FIRST_CHILD(this)->fops->ftruncate, fd, offset, xdata);
         return 0;
 }
 
 int32_t
 default_getxattr_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                         const char *name)
+                         const char *name, dict_t *xdata)
 {
         STACK_WIND (frame, default_getxattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->getxattr, loc, name);
+                    FIRST_CHILD(this)->fops->getxattr, loc, name, xdata);
         return 0;
 }
 
 
 int32_t
 default_xattrop_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                        gf_xattrop_flags_t flags, dict_t *dict)
+                        gf_xattrop_flags_t flags, dict_t *dict, dict_t *xdata)
 {
         STACK_WIND (frame, default_xattrop_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->xattrop, loc, flags, dict);
+                    FIRST_CHILD(this)->fops->xattrop, loc, flags, dict, xdata);
         return 0;
 }
 
 int32_t
 default_fxattrop_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                         gf_xattrop_flags_t flags, dict_t *dict)
+                         gf_xattrop_flags_t flags, dict_t *dict, dict_t *xdata)
 {
         STACK_WIND (frame, default_fxattrop_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fxattrop, fd, flags, dict);
+                    FIRST_CHILD(this)->fops->fxattrop, fd, flags, dict, xdata);
         return 0;
 }
 
 int32_t
 default_removexattr_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                            const char *name)
+                            const char *name, dict_t *xdata)
 {
         STACK_WIND (frame, default_removexattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->removexattr, loc, name);
+                    FIRST_CHILD(this)->fops->removexattr, loc, name, xdata);
         return 0;
 }
 
 int32_t
 default_fremovexattr_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                             const char *name)
+                             const char *name, dict_t *xdata)
 {
         STACK_WIND (frame, default_fremovexattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fremovexattr, fd, name);
+                    FIRST_CHILD(this)->fops->fremovexattr, fd, name, xdata);
         return 0;
 }
 
 int32_t
 default_lk_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                   int32_t cmd, struct gf_flock *lock)
+                   int32_t cmd, struct gf_flock *lock, dict_t *xdata)
 {
         STACK_WIND (frame, default_lk_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->lk, fd, cmd, lock);
+                    FIRST_CHILD(this)->fops->lk, fd, cmd, lock, xdata);
         return 0;
 }
 
@@ -705,117 +747,127 @@ default_lk_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
 int32_t
 default_inodelk_resume (call_frame_t *frame, xlator_t *this,
                         const char *volume, loc_t *loc, int32_t cmd,
-                        struct gf_flock *lock)
+                        struct gf_flock *lock,
+                        dict_t *xdata)
 {
         STACK_WIND (frame, default_inodelk_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->inodelk,
-                    volume, loc, cmd, lock);
+                    volume, loc, cmd, lock, xdata);
         return 0;
 }
 
 int32_t
 default_finodelk_resume (call_frame_t *frame, xlator_t *this,
                          const char *volume, fd_t *fd, int32_t cmd,
-                         struct gf_flock *lock)
+                         struct gf_flock *lock,
+                         dict_t *xdata)
 {
         STACK_WIND (frame, default_finodelk_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->finodelk,
-                    volume, fd, cmd, lock);
+                    volume, fd, cmd, lock, xdata);
         return 0;
 }
 
 int32_t
 default_entrylk_resume (call_frame_t *frame, xlator_t *this,
                         const char *volume, loc_t *loc, const char *basename,
-                        entrylk_cmd cmd, entrylk_type type)
+                        entrylk_cmd cmd, entrylk_type type,
+                        dict_t *xdata)
 {
         STACK_WIND (frame, default_entrylk_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->entrylk,
-                    volume, loc, basename, cmd, type);
+                    volume, loc, basename, cmd, type, xdata);
         return 0;
 }
 
 int32_t
 default_fentrylk_resume (call_frame_t *frame, xlator_t *this,
                          const char *volume, fd_t *fd, const char *basename,
-                         entrylk_cmd cmd, entrylk_type type)
+                         entrylk_cmd cmd, entrylk_type type,
+                         dict_t *xdata)
 {
         STACK_WIND (frame, default_fentrylk_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->fentrylk,
-                    volume, fd, basename, cmd, type);
+                    volume, fd, basename, cmd, type, xdata);
         return 0;
 }
 
 int32_t
 default_rchecksum_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                          off_t offset, int32_t len)
+                          off_t offset, int32_t len,
+                          dict_t *xdata)
 {
         STACK_WIND (frame, default_rchecksum_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->rchecksum, fd, offset, len);
+                    FIRST_CHILD(this)->fops->rchecksum, fd, offset, len, xdata);
         return 0;
 }
 
 
 int32_t
 default_readdir_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                        size_t size, off_t off)
+                        size_t size, off_t off,
+                        dict_t *xdata)
 {
         STACK_WIND (frame, default_readdir_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readdir, fd, size, off);
+                    FIRST_CHILD(this)->fops->readdir, fd, size, off, xdata);
         return 0;
 }
 
 
 int32_t
 default_readdirp_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                         size_t size, off_t off, dict_t *dict)
+                         size_t size, off_t off, dict_t *xdata)
 {
         STACK_WIND (frame, default_readdirp_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readdirp, fd, size, off, dict);
+                    FIRST_CHILD(this)->fops->readdirp, fd, size, off, xdata);
         return 0;
 }
 
 int32_t
 default_setattr_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                        struct iatt *stbuf, int32_t valid)
+                        struct iatt *stbuf, int32_t valid,
+                        dict_t *xdata)
 {
         STACK_WIND (frame, default_setattr_cbk, FIRST_CHILD (this),
-                    FIRST_CHILD (this)->fops->setattr, loc, stbuf, valid);
+                    FIRST_CHILD (this)->fops->setattr, loc, stbuf, valid, xdata);
         return 0;
 }
 
 int32_t
 default_truncate_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                         off_t offset)
+                         off_t offset,
+                         dict_t *xdata)
 {
         STACK_WIND (frame, default_truncate_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->truncate, loc, offset);
+                    FIRST_CHILD(this)->fops->truncate, loc, offset, xdata);
         return 0;
 }
 
 int32_t
-default_stat_resume (call_frame_t *frame, xlator_t *this, loc_t *loc)
+default_stat_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
+                     dict_t *xdata)
 {
         STACK_WIND (frame, default_stat_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->stat, loc);
+                    FIRST_CHILD(this)->fops->stat, loc, xdata);
         return 0;
 }
 
 int32_t
 default_lookup_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                       dict_t *xattr_req)
+                       dict_t *xdata)
 {
         STACK_WIND (frame, default_lookup_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->lookup, loc, xattr_req);
+                    FIRST_CHILD(this)->fops->lookup, loc, xdata);
         return 0;
 }
 
 int32_t
 default_fsetattr_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                         struct iatt *stbuf, int32_t valid)
+                         struct iatt *stbuf, int32_t valid,
+                         dict_t *xdata)
 {
         STACK_WIND (frame, default_fsetattr_cbk, FIRST_CHILD (this),
-                    FIRST_CHILD (this)->fops->fsetattr, fd, stbuf, valid);
+                    FIRST_CHILD (this)->fops->fsetattr, fd, stbuf, valid, xdata);
         return 0;
 }
 
@@ -823,258 +875,263 @@ default_fsetattr_resume (call_frame_t *frame, xlator_t *this, fd_t *fd,
 
 int32_t
 default_fgetxattr (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                   const char *name)
+                   const char *name, dict_t *xdata)
 {
         STACK_WIND (frame, default_fgetxattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fgetxattr, fd, name);
+                    FIRST_CHILD(this)->fops->fgetxattr, fd, name, xdata);
         return 0;
 }
 
 int32_t
 default_fsetxattr (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *dict,
-                   int32_t flags)
+                   int32_t flags, dict_t *xdata)
 {
         STACK_WIND (frame, default_fsetxattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fsetxattr, fd, dict, flags);
+                    FIRST_CHILD(this)->fops->fsetxattr, fd, dict, flags, xdata);
         return 0;
 }
 
 int32_t
 default_setxattr (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict,
-                  int32_t flags)
+                  int32_t flags, dict_t *xdata)
 {
         STACK_WIND (frame, default_setxattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->setxattr, loc, dict, flags);
+                    FIRST_CHILD(this)->fops->setxattr, loc, dict, flags, xdata);
         return 0;
 }
 
 int32_t
-default_statfs (call_frame_t *frame, xlator_t *this, loc_t *loc)
+default_statfs (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata)
 {
         STACK_WIND (frame, default_statfs_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->statfs, loc);
+                    FIRST_CHILD(this)->fops->statfs, loc, xdata);
         return 0;
 }
 
 int32_t
-default_fsyncdir (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags)
+default_fsyncdir (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags, dict_t *xdata)
 {
         STACK_WIND (frame, default_fsyncdir_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fsyncdir, fd, flags);
+                    FIRST_CHILD(this)->fops->fsyncdir, fd, flags, xdata);
         return 0;
 }
 
 int32_t
-default_opendir (call_frame_t *frame, xlator_t *this, loc_t *loc, fd_t *fd)
+default_opendir (call_frame_t *frame, xlator_t *this, loc_t *loc, fd_t *fd, dict_t *xdata)
 {
         STACK_WIND (frame, default_opendir_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->opendir, loc, fd);
+                    FIRST_CHILD(this)->fops->opendir, loc, fd, xdata);
         return 0;
 }
 
 int32_t
-default_fstat (call_frame_t *frame, xlator_t *this, fd_t *fd)
+default_fstat (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata)
 {
         STACK_WIND (frame, default_fstat_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fstat, fd);
+                    FIRST_CHILD(this)->fops->fstat, fd, xdata);
         return 0;
 }
 
 int32_t
-default_fsync (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags)
+default_fsync (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags, dict_t *xdata)
 {
         STACK_WIND (frame, default_fsync_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fsync, fd, flags);
+                    FIRST_CHILD(this)->fops->fsync, fd, flags, xdata);
         return 0;
 }
 
 int32_t
-default_flush (call_frame_t *frame, xlator_t *this, fd_t *fd)
+default_flush (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata)
 {
         STACK_WIND (frame, default_flush_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->flush, fd);
+                    FIRST_CHILD(this)->fops->flush, fd, xdata);
         return 0;
 }
 
 int32_t
 default_writev (call_frame_t *frame, xlator_t *this, fd_t *fd,
                 struct iovec *vector, int32_t count, off_t off, uint32_t flags,
-                struct iobref *iobref)
+                struct iobref *iobref, dict_t *xdata)
 {
         STACK_WIND (frame, default_writev_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->writev, fd, vector, count, off,
-                    flags, iobref);
+                    flags, iobref, xdata);
         return 0;
 }
 
 int32_t
 default_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-               off_t offset, uint32_t flags)
+               off_t offset, uint32_t flags, dict_t *xdata)
 {
         STACK_WIND (frame, default_readv_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readv, fd, size, offset, flags);
+                    FIRST_CHILD(this)->fops->readv, fd, size, offset, flags, xdata);
         return 0;
 }
 
 
 int32_t
 default_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
-              fd_t *fd, int32_t wbflags)
+              fd_t *fd, dict_t *xdata)
 {
         STACK_WIND (frame, default_open_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->open, loc, flags, fd, wbflags);
+                    FIRST_CHILD(this)->fops->open, loc, flags, fd, xdata);
         return 0;
 }
 
 int32_t
 default_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
-                mode_t mode, fd_t *fd, dict_t *params)
+                mode_t mode, mode_t umask, fd_t *fd, dict_t *xdata)
 {
         STACK_WIND (frame, default_create_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->create, loc, flags, mode, fd,
-                    params);
+                    FIRST_CHILD(this)->fops->create, loc, flags, mode, umask,
+                    fd, xdata);
         return 0;
 }
 
 int32_t
-default_link (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc)
+default_link (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc,
+              dict_t *xdata)
 {
         STACK_WIND (frame, default_link_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->link, oldloc, newloc);
+                    FIRST_CHILD(this)->fops->link, oldloc, newloc, xdata);
         return 0;
 }
 
 int32_t
 default_rename (call_frame_t *frame, xlator_t *this, loc_t *oldloc,
-                loc_t *newloc)
+                loc_t *newloc, dict_t *xdata)
 {
         STACK_WIND (frame, default_rename_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->rename, oldloc, newloc);
+                    FIRST_CHILD(this)->fops->rename, oldloc, newloc, xdata);
         return 0;
 }
 
 
 int
 default_symlink (call_frame_t *frame, xlator_t *this, const char *linkpath,
-                 loc_t *loc, dict_t *params)
+                 loc_t *loc, mode_t umask, dict_t *xdata)
 {
         STACK_WIND (frame, default_symlink_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->symlink, linkpath, loc, params);
+                    FIRST_CHILD(this)->fops->symlink, linkpath, loc, umask,
+                    xdata);
         return 0;
 }
 
 int32_t
-default_rmdir (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags)
+default_rmdir (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags,
+               dict_t *xdata)
 {
         STACK_WIND (frame, default_rmdir_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->rmdir, loc, flags);
+                    FIRST_CHILD(this)->fops->rmdir, loc, flags, xdata);
         return 0;
 }
 
 int32_t
-default_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc)
+default_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc, int xflag,
+                dict_t *xdata)
 {
         STACK_WIND (frame, default_unlink_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->unlink, loc);
+                    FIRST_CHILD(this)->fops->unlink, loc, xflag, xdata);
         return 0;
 }
 
 int
 default_mkdir (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
-               dict_t *params)
+               mode_t umask, dict_t *xdata)
 {
         STACK_WIND (frame, default_mkdir_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->mkdir, loc, mode, params);
+                    FIRST_CHILD(this)->fops->mkdir, loc, mode, umask, xdata);
         return 0;
 }
 
 
 int
 default_mknod (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
-               dev_t rdev, dict_t *parms)
+               dev_t rdev, mode_t umask, dict_t *xdata)
 {
         STACK_WIND (frame, default_mknod_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->mknod, loc, mode, rdev, parms);
+                    FIRST_CHILD(this)->fops->mknod, loc, mode, rdev, umask,
+                    xdata);
         return 0;
 }
 
 int32_t
-default_readlink (call_frame_t *frame, xlator_t *this, loc_t *loc, size_t size)
+default_readlink (call_frame_t *frame, xlator_t *this, loc_t *loc, size_t size, dict_t *xdata)
 {
         STACK_WIND (frame, default_readlink_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readlink, loc, size);
+                    FIRST_CHILD(this)->fops->readlink, loc, size, xdata);
         return 0;
 }
 
 
 int32_t
-default_access (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t mask)
+default_access (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t mask, dict_t *xdata)
 {
         STACK_WIND (frame, default_access_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->access, loc, mask);
+                    FIRST_CHILD(this)->fops->access, loc, mask, xdata);
         return 0;
 }
 
 int32_t
-default_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset)
+default_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, dict_t *xdata)
 {
         STACK_WIND (frame, default_ftruncate_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->ftruncate, fd, offset);
+                    FIRST_CHILD(this)->fops->ftruncate, fd, offset, xdata);
         return 0;
 }
 
 int32_t
 default_getxattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                  const char *name)
+                  const char *name, dict_t *xdata)
 {
         STACK_WIND (frame, default_getxattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->getxattr, loc, name);
+                    FIRST_CHILD(this)->fops->getxattr, loc, name, xdata);
         return 0;
 }
 
 
 int32_t
 default_xattrop (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                 gf_xattrop_flags_t flags, dict_t *dict)
+                 gf_xattrop_flags_t flags, dict_t *dict, dict_t *xdata)
 {
         STACK_WIND (frame, default_xattrop_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->xattrop, loc, flags, dict);
+                    FIRST_CHILD(this)->fops->xattrop, loc, flags, dict, xdata);
         return 0;
 }
 
 int32_t
 default_fxattrop (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                  gf_xattrop_flags_t flags, dict_t *dict)
+                  gf_xattrop_flags_t flags, dict_t *dict, dict_t *xdata)
 {
         STACK_WIND (frame, default_fxattrop_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fxattrop, fd, flags, dict);
+                    FIRST_CHILD(this)->fops->fxattrop, fd, flags, dict, xdata);
         return 0;
 }
 
 int32_t
 default_removexattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                     const char *name)
+                     const char *name, dict_t *xdata)
 {
         STACK_WIND (frame, default_removexattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->removexattr, loc, name);
+                    FIRST_CHILD(this)->fops->removexattr, loc, name, xdata);
         return 0;
 }
 
 int32_t
 default_fremovexattr (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                      const char *name)
+                      const char *name, dict_t *xdata)
 {
         STACK_WIND (frame, default_fremovexattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fremovexattr, fd, name);
+                    FIRST_CHILD(this)->fops->fremovexattr, fd, name, xdata);
         return 0;
 }
 
 int32_t
 default_lk (call_frame_t *frame, xlator_t *this, fd_t *fd,
-            int32_t cmd, struct gf_flock *lock)
+            int32_t cmd, struct gf_flock *lock, dict_t *xdata)
 {
         STACK_WIND (frame, default_lk_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->lk, fd, cmd, lock);
+                    FIRST_CHILD(this)->fops->lk, fd, cmd, lock, xdata);
         return 0;
 }
 
@@ -1082,115 +1139,125 @@ default_lk (call_frame_t *frame, xlator_t *this, fd_t *fd,
 int32_t
 default_inodelk (call_frame_t *frame, xlator_t *this,
                  const char *volume, loc_t *loc, int32_t cmd,
-                 struct gf_flock *lock)
+                 struct gf_flock *lock,
+                 dict_t *xdata)
 {
         STACK_WIND (frame, default_inodelk_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->inodelk,
-                    volume, loc, cmd, lock);
+                    volume, loc, cmd, lock, xdata);
         return 0;
 }
 
 int32_t
 default_finodelk (call_frame_t *frame, xlator_t *this,
-                  const char *volume, fd_t *fd, int32_t cmd, struct gf_flock *lock)
+                  const char *volume, fd_t *fd, int32_t cmd, struct gf_flock *lock,
+                  dict_t *xdata)
 {
         STACK_WIND (frame, default_finodelk_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->finodelk,
-                    volume, fd, cmd, lock);
+                    volume, fd, cmd, lock, xdata);
         return 0;
 }
 
 int32_t
 default_entrylk (call_frame_t *frame, xlator_t *this,
                  const char *volume, loc_t *loc, const char *basename,
-                 entrylk_cmd cmd, entrylk_type type)
+                 entrylk_cmd cmd, entrylk_type type,
+                 dict_t *xdata)
 {
         STACK_WIND (frame, default_entrylk_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->entrylk,
-                    volume, loc, basename, cmd, type);
+                    volume, loc, basename, cmd, type, xdata);
         return 0;
 }
 
 int32_t
 default_fentrylk (call_frame_t *frame, xlator_t *this,
                   const char *volume, fd_t *fd, const char *basename,
-                  entrylk_cmd cmd, entrylk_type type)
+                  entrylk_cmd cmd, entrylk_type type,
+                  dict_t *xdata)
 {
         STACK_WIND (frame, default_fentrylk_cbk, FIRST_CHILD(this),
                     FIRST_CHILD(this)->fops->fentrylk,
-                    volume, fd, basename, cmd, type);
+                    volume, fd, basename, cmd, type, xdata);
         return 0;
 }
 
 int32_t
 default_rchecksum (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
-                   int32_t len)
+                   int32_t len,
+                   dict_t *xdata)
 {
         STACK_WIND (frame, default_rchecksum_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->rchecksum, fd, offset, len);
+                    FIRST_CHILD(this)->fops->rchecksum, fd, offset, len, xdata);
         return 0;
 }
 
 
 int32_t
 default_readdir (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                 size_t size, off_t off)
+                 size_t size, off_t off,
+                 dict_t *xdata)
 {
         STACK_WIND (frame, default_readdir_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readdir, fd, size, off);
+                    FIRST_CHILD(this)->fops->readdir, fd, size, off, xdata);
         return 0;
 }
 
 
 int32_t
 default_readdirp (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                  size_t size, off_t off, dict_t *dict)
+                  size_t size, off_t off, dict_t *xdata)
 {
         STACK_WIND (frame, default_readdirp_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readdirp, fd, size, off, dict);
+                    FIRST_CHILD(this)->fops->readdirp, fd, size, off, xdata);
         return 0;
 }
 
 int32_t
 default_setattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                 struct iatt *stbuf, int32_t valid)
+                 struct iatt *stbuf, int32_t valid,
+                 dict_t *xdata)
 {
         STACK_WIND (frame, default_setattr_cbk, FIRST_CHILD (this),
-                    FIRST_CHILD (this)->fops->setattr, loc, stbuf, valid);
+                    FIRST_CHILD (this)->fops->setattr, loc, stbuf, valid, xdata);
         return 0;
 }
 
 int32_t
-default_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset)
+default_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset,
+                  dict_t *xdata)
 {
         STACK_WIND (frame, default_truncate_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->truncate, loc, offset);
+                    FIRST_CHILD(this)->fops->truncate, loc, offset, xdata);
         return 0;
 }
 
 int32_t
-default_stat (call_frame_t *frame, xlator_t *this, loc_t *loc)
+default_stat (call_frame_t *frame, xlator_t *this, loc_t *loc,
+              dict_t *xdata)
 {
         STACK_WIND (frame, default_stat_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->stat, loc);
+                    FIRST_CHILD(this)->fops->stat, loc, xdata);
         return 0;
 }
 
 int32_t
 default_lookup (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                dict_t *xattr_req)
+                dict_t *xdata)
 {
         STACK_WIND (frame, default_lookup_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->lookup, loc, xattr_req);
+                    FIRST_CHILD(this)->fops->lookup, loc, xdata);
         return 0;
 }
 
 int32_t
 default_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd,
-                  struct iatt *stbuf, int32_t valid)
+                  struct iatt *stbuf, int32_t valid,
+                  dict_t *xdata)
 {
         STACK_WIND (frame, default_fsetattr_cbk, FIRST_CHILD (this),
-                    FIRST_CHILD (this)->fops->fsetattr, fd, stbuf, valid);
+                    FIRST_CHILD (this)->fops->fsetattr, fd, stbuf, valid, xdata);
         return 0;
 }
 
diff --git a/libglusterfs/src/defaults.h b/libglusterfs/src/defaults.h
index f30bd8332ad..ae01fc2052c 100644
--- a/libglusterfs/src/defaults.h
+++ b/libglusterfs/src/defaults.h
@@ -31,6 +31,18 @@
 
 #include "xlator.h"
 
+int32_t default_notify (xlator_t *this,
+                        int32_t event,
+                        void *data,
+                        ...);
+
+int32_t default_forget (xlator_t *this, inode_t *inode);
+
+int32_t default_release (xlator_t *this, fd_t *fd);
+
+int32_t default_releasedir (xlator_t *this, fd_t *fd);
+
+
 /* Management Operations */
 
 int32_t default_getspec (call_frame_t *frame,
@@ -41,84 +53,85 @@ int32_t default_getspec (call_frame_t *frame,
 int32_t default_rchecksum (call_frame_t *frame,
                            xlator_t *this,
                            fd_t *fd, off_t offset,
-                           int32_t len);
+                           int32_t len, dict_t *xdata);
 
 /* FileSystem operations */
 int32_t default_lookup (call_frame_t *frame,
                         xlator_t *this,
                         loc_t *loc,
-                        dict_t *xattr_req);
+                        dict_t *xdata);
 
 int32_t default_stat (call_frame_t *frame,
                       xlator_t *this,
-                      loc_t *loc);
+                      loc_t *loc, dict_t *xdata);
 
 int32_t default_fstat (call_frame_t *frame,
                        xlator_t *this,
-                       fd_t *fd);
+                       fd_t *fd, dict_t *xdata);
 
 int32_t default_truncate (call_frame_t *frame,
                           xlator_t *this,
                           loc_t *loc,
-                          off_t offset);
+                          off_t offset, dict_t *xdata);
 
 int32_t default_ftruncate (call_frame_t *frame,
                            xlator_t *this,
                            fd_t *fd,
-                           off_t offset);
+                           off_t offset, dict_t *xdata);
 
 int32_t default_access (call_frame_t *frame,
                         xlator_t *this,
                         loc_t *loc,
-                        int32_t mask);
+                        int32_t mask, dict_t *xdata);
 
 int32_t default_readlink (call_frame_t *frame,
                           xlator_t *this,
                           loc_t *loc,
-                          size_t size);
+                          size_t size, dict_t *xdata);
 
-int32_t default_mknod (call_frame_t *frame, xlator_t *this,
-                       loc_t *loc, mode_t mode, dev_t rdev, dict_t *params);
+int32_t default_mknod (call_frame_t *frame, xlator_t *this, loc_t *loc,
+                       mode_t mode, dev_t rdev, mode_t umask, dict_t *xdata);
 
 int32_t default_mkdir (call_frame_t *frame, xlator_t *this,
-                       loc_t *loc, mode_t mode, dict_t *params);
+                       loc_t *loc, mode_t mode, mode_t umask, dict_t *xdata);
 
 int32_t default_unlink (call_frame_t *frame,
                         xlator_t *this,
-                        loc_t *loc);
+                        loc_t *loc, int xflag, dict_t *xdata);
 
 int32_t default_rmdir (call_frame_t *frame, xlator_t *this,
-                       loc_t *loc, int flags);
+                       loc_t *loc, int xflag, dict_t *xdata);
 
 int32_t default_symlink (call_frame_t *frame, xlator_t *this,
-                         const char *linkpath, loc_t *loc, dict_t *params);
+                         const char *linkpath, loc_t *loc, mode_t umask,
+                         dict_t *xdata);
 
 int32_t default_rename (call_frame_t *frame,
                         xlator_t *this,
                         loc_t *oldloc,
-                        loc_t *newloc);
+                        loc_t *newloc, dict_t *xdata);
 
 int32_t default_link (call_frame_t *frame,
                       xlator_t *this,
                       loc_t *oldloc,
-                      loc_t *newloc);
+                      loc_t *newloc, dict_t *xdata);
 
 int32_t default_create (call_frame_t *frame, xlator_t *this,
                         loc_t *loc, int32_t flags, mode_t mode,
-                        fd_t *fd, dict_t *params);
+                        mode_t umask, fd_t *fd, dict_t *xdata);
 
 int32_t default_open (call_frame_t *frame,
                       xlator_t *this,
                       loc_t *loc,
                       int32_t flags, fd_t *fd,
-                      int32_t wbflags);
+                      dict_t *xdata);
 
 int32_t default_readv (call_frame_t *frame,
                        xlator_t *this,
                        fd_t *fd,
                        size_t size,
                        off_t offset,
-                       uint32_t flags);
+                       uint32_t flags, dict_t *xdata);
 
 int32_t default_writev (call_frame_t *frame,
                         xlator_t *this,
@@ -127,218 +140,205 @@ int32_t default_writev (call_frame_t *frame,
                         int32_t count,
                         off_t offset,
                         uint32_t flags,
-                        struct iobref *iobref);
+                        struct iobref *iobref, dict_t *xdata);
 
 int32_t default_flush (call_frame_t *frame,
                        xlator_t *this,
-                       fd_t *fd);
+                       fd_t *fd, dict_t *xdata);
 
 int32_t default_fsync (call_frame_t *frame,
                        xlator_t *this,
                        fd_t *fd,
-                       int32_t datasync);
+                       int32_t datasync, dict_t *xdata);
 
 int32_t default_opendir (call_frame_t *frame,
                          xlator_t *this,
-                         loc_t *loc, fd_t *fd);
+                         loc_t *loc, fd_t *fd, dict_t *xdata);
 
 int32_t default_fsyncdir (call_frame_t *frame,
                           xlator_t *this,
                           fd_t *fd,
-                          int32_t datasync);
+                          int32_t datasync, dict_t *xdata);
 
 int32_t default_statfs (call_frame_t *frame,
                         xlator_t *this,
-                        loc_t *loc);
+                        loc_t *loc, dict_t *xdata);
 
 int32_t default_setxattr (call_frame_t *frame,
                           xlator_t *this,
                           loc_t *loc,
                           dict_t *dict,
-                          int32_t flags);
+                          int32_t flags, dict_t *xdata);
 
 int32_t default_getxattr (call_frame_t *frame,
                           xlator_t *this,
                           loc_t *loc,
-                          const char *name);
+                          const char *name, dict_t *xdata);
 
 int32_t default_fsetxattr (call_frame_t *frame,
                            xlator_t *this,
                            fd_t *fd,
                            dict_t *dict,
-                           int32_t flags);
+                           int32_t flags, dict_t *xdata);
 
 int32_t default_fgetxattr (call_frame_t *frame,
                            xlator_t *this,
                            fd_t *fd,
-                           const char *name);
+                           const char *name, dict_t *xdata);
 
 int32_t default_removexattr (call_frame_t *frame,
                              xlator_t *this,
                              loc_t *loc,
-                             const char *name);
+                             const char *name, dict_t *xdata);
 
 int32_t default_fremovexattr (call_frame_t *frame,
                               xlator_t *this,
                               fd_t *fd,
-                              const char *name);
+                              const char *name, dict_t *xdata);
 
 int32_t default_lk (call_frame_t *frame,
                     xlator_t *this,
                     fd_t *fd,
                     int32_t cmd,
-                    struct gf_flock *flock);
+                    struct gf_flock *flock, dict_t *xdata);
 
 int32_t default_inodelk (call_frame_t *frame, xlator_t *this,
                          const char *volume, loc_t *loc, int32_t cmd,
-                         struct gf_flock *flock);
+                         struct gf_flock *flock, dict_t *xdata);
 
 int32_t default_finodelk (call_frame_t *frame, xlator_t *this,
                           const char *volume, fd_t *fd, int32_t cmd,
-                          struct gf_flock *flock);
+                          struct gf_flock *flock, dict_t *xdata);
 
 int32_t default_entrylk (call_frame_t *frame, xlator_t *this,
                          const char *volume, loc_t *loc, const char *basename,
-                         entrylk_cmd cmd, entrylk_type type);
+                         entrylk_cmd cmd, entrylk_type type, dict_t *xdata);
 
 int32_t default_fentrylk (call_frame_t *frame, xlator_t *this,
                           const char *volume, fd_t *fd, const char *basename,
-                          entrylk_cmd cmd, entrylk_type type);
+                          entrylk_cmd cmd, entrylk_type type, dict_t *xdata);
 
 int32_t default_readdir (call_frame_t *frame,
                           xlator_t *this,
                           fd_t *fd,
-                          size_t size, off_t off);
+                          size_t size, off_t off, dict_t *xdata);
 
 int32_t default_readdirp (call_frame_t *frame,
                           xlator_t *this,
                           fd_t *fd,
-                          size_t size, off_t off, dict_t *dict);
+                          size_t size, off_t off, dict_t *xdata);
 
 int32_t default_xattrop (call_frame_t *frame,
                          xlator_t *this,
                          loc_t *loc,
                          gf_xattrop_flags_t flags,
-                         dict_t *dict);
+                         dict_t *dict, dict_t *xdata);
 
 int32_t default_fxattrop (call_frame_t *frame,
                           xlator_t *this,
                           fd_t *fd,
                           gf_xattrop_flags_t flags,
-                          dict_t *dict);
-
-int32_t default_notify (xlator_t *this,
-                        int32_t event,
-                        void *data,
-                        ...);
-
-int32_t default_forget (xlator_t *this,
-                        inode_t *inode);
-
-int32_t default_release (xlator_t *this,
-                         fd_t *fd);
-
-int32_t default_releasedir (xlator_t *this,
-                            fd_t *fd);
+                          dict_t *dict, dict_t *xdata);
 
 int32_t default_setattr (call_frame_t *frame,
                          xlator_t *this,
                          loc_t *loc,
                          struct iatt *stbuf,
-                         int32_t valid);
+                         int32_t valid, dict_t *xdata);
 
 int32_t default_fsetattr (call_frame_t *frame,
                           xlator_t *this,
                           fd_t *fd,
                           struct iatt *stbuf,
-                          int32_t valid);
+                          int32_t valid, dict_t *xdata);
 
 /* Resume */
-int32_t default_getspec (call_frame_t *frame,
-                         xlator_t *this,
-                         const char *key,
-                         int32_t flag);
+int32_t default_getspec_resume (call_frame_t *frame,
+                                xlator_t *this,
+                                const char *key,
+                                int32_t flag);
 
-int32_t default_rchecksum (call_frame_t *frame,
+int32_t default_rchecksum_resume (call_frame_t *frame,
                            xlator_t *this,
                            fd_t *fd, off_t offset,
-                           int32_t len);
+                           int32_t len, dict_t *xdata);
 
 /* FileSystem operations */
 int32_t default_lookup_resume (call_frame_t *frame,
-                        xlator_t *this,
-                        loc_t *loc,
-                        dict_t *xattr_req);
+                               xlator_t *this,
+                               loc_t *loc,
+                               dict_t *xdata);
 
 int32_t default_stat_resume (call_frame_t *frame,
                       xlator_t *this,
-                      loc_t *loc);
+                      loc_t *loc, dict_t *xdata);
 
 int32_t default_fstat_resume (call_frame_t *frame,
                        xlator_t *this,
-                       fd_t *fd);
+                       fd_t *fd, dict_t *xdata);
 
 int32_t default_truncate_resume (call_frame_t *frame,
                           xlator_t *this,
                           loc_t *loc,
-                          off_t offset);
+                          off_t offset, dict_t *xdata);
 
 int32_t default_ftruncate_resume (call_frame_t *frame,
                            xlator_t *this,
                            fd_t *fd,
-                           off_t offset);
+                           off_t offset, dict_t *xdata);
 
 int32_t default_access_resume (call_frame_t *frame,
                         xlator_t *this,
                         loc_t *loc,
-                        int32_t mask);
+                        int32_t mask, dict_t *xdata);
 
 int32_t default_readlink_resume (call_frame_t *frame,
                           xlator_t *this,
                           loc_t *loc,
-                          size_t size);
+                          size_t size, dict_t *xdata);
 
-int32_t default_mknod_resume (call_frame_t *frame, xlator_t *this,
-                       loc_t *loc, mode_t mode, dev_t rdev, dict_t *params);
+int32_t default_mknod_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
+                              mode_t mode, dev_t rdev, mode_t umask,
+                              dict_t *xdata);
 
-int32_t default_mkdir_resume (call_frame_t *frame, xlator_t *this,
-                       loc_t *loc, mode_t mode, dict_t *params);
+int32_t default_mkdir_resume (call_frame_t *frame, xlator_t *this, loc_t *loc,
+                              mode_t mode, mode_t umask, dict_t *xdata);
 
 int32_t default_unlink_resume (call_frame_t *frame,
-                        xlator_t *this,
-                        loc_t *loc);
+                               xlator_t *this,
+                               loc_t *loc, int xflag, dict_t *xdata);
 
 int32_t default_rmdir_resume (call_frame_t *frame, xlator_t *this,
-                              loc_t *loc, int flags);
+                              loc_t *loc, int xflag, dict_t *xdata);
 
 int32_t default_symlink_resume (call_frame_t *frame, xlator_t *this,
-                         const char *linkpath, loc_t *loc, dict_t *params);
+                                const char *linkpath, loc_t *loc, mode_t umask,
+                                dict_t *xdata);
 
 int32_t default_rename_resume (call_frame_t *frame,
                         xlator_t *this,
                         loc_t *oldloc,
-                        loc_t *newloc);
+                        loc_t *newloc, dict_t *xdata);
 
 int32_t default_link_resume (call_frame_t *frame,
                       xlator_t *this,
                       loc_t *oldloc,
-                      loc_t *newloc);
+                      loc_t *newloc, dict_t *xdata);
 
 int32_t default_create_resume (call_frame_t *frame, xlator_t *this,
-                        loc_t *loc, int32_t flags, mode_t mode,
-                        fd_t *fd, dict_t *params);
+                               loc_t *loc, int32_t flags, mode_t mode,
+                               mode_t umask, fd_t *fd, dict_t *xdata);
 
 int32_t default_open_resume (call_frame_t *frame,
-                      xlator_t *this,
-                      loc_t *loc,
-                      int32_t flags, fd_t *fd,
-                      int32_t wbflags);
+                             xlator_t *this,
+                             loc_t *loc,
+                             int32_t flags, fd_t *fd, dict_t *xdata);
 
 int32_t default_readv_resume (call_frame_t *frame,
                               xlator_t *this,
                               fd_t *fd,
                               size_t size,
-                              off_t offset, uint32_t flags);
+                              off_t offset, uint32_t flags, dict_t *xdata);
 
 int32_t default_writev_resume (call_frame_t *frame,
                                xlator_t *this,
@@ -346,345 +346,331 @@ int32_t default_writev_resume (call_frame_t *frame,
                                struct iovec *vector,
                                int32_t count,
                                off_t offset, uint32_t flags,
-                               struct iobref *iobref);
+                               struct iobref *iobref, dict_t *xdata);
 
 int32_t default_flush_resume (call_frame_t *frame,
                        xlator_t *this,
-                       fd_t *fd);
+                       fd_t *fd, dict_t *xdata);
 
 int32_t default_fsync_resume (call_frame_t *frame,
                        xlator_t *this,
                        fd_t *fd,
-                       int32_t datasync);
+                       int32_t datasync, dict_t *xdata);
 
 int32_t default_opendir_resume (call_frame_t *frame,
                          xlator_t *this,
-                         loc_t *loc, fd_t *fd);
+                         loc_t *loc, fd_t *fd, dict_t *xdata);
 
 int32_t default_fsyncdir_resume (call_frame_t *frame,
                           xlator_t *this,
                           fd_t *fd,
-                          int32_t datasync);
+                          int32_t datasync, dict_t *xdata);
 
 int32_t default_statfs_resume (call_frame_t *frame,
                         xlator_t *this,
-                        loc_t *loc);
+                        loc_t *loc, dict_t *xdata);
 
 int32_t default_setxattr_resume (call_frame_t *frame,
                           xlator_t *this,
                           loc_t *loc,
                           dict_t *dict,
-                          int32_t flags);
+                          int32_t flags, dict_t *xdata);
 
 int32_t default_getxattr_resume (call_frame_t *frame,
                           xlator_t *this,
                           loc_t *loc,
-                          const char *name);
+                          const char *name, dict_t *xdata);
 
 int32_t default_fsetxattr_resume (call_frame_t *frame,
                            xlator_t *this,
                            fd_t *fd,
                            dict_t *dict,
-                           int32_t flags);
+                           int32_t flags, dict_t *xdata);
 
 int32_t default_fgetxattr_resume (call_frame_t *frame,
                            xlator_t *this,
                            fd_t *fd,
-                           const char *name);
+                           const char *name, dict_t *xdata);
 
 int32_t default_removexattr_resume (call_frame_t *frame,
                              xlator_t *this,
                              loc_t *loc,
-                             const char *name);
+                             const char *name, dict_t *xdata);
 
 int32_t default_fremovexattr_resume (call_frame_t *frame,
                                      xlator_t *this,
                                      fd_t *fd,
-                                     const char *name);
+                                     const char *name, dict_t *xdata);
 
 int32_t default_lk_resume (call_frame_t *frame,
                     xlator_t *this,
                     fd_t *fd,
                     int32_t cmd,
-                    struct gf_flock *flock);
+                    struct gf_flock *flock, dict_t *xdata);
 
 int32_t default_inodelk_resume (call_frame_t *frame, xlator_t *this,
                          const char *volume, loc_t *loc, int32_t cmd,
-                         struct gf_flock *flock);
+                         struct gf_flock *flock, dict_t *xdata);
 
 int32_t default_finodelk_resume (call_frame_t *frame, xlator_t *this,
                           const char *volume, fd_t *fd, int32_t cmd,
-                          struct gf_flock *flock);
+                          struct gf_flock *flock, dict_t *xdata);
 
 int32_t default_entrylk_resume (call_frame_t *frame, xlator_t *this,
                          const char *volume, loc_t *loc, const char *basename,
-                         entrylk_cmd cmd, entrylk_type type);
+                         entrylk_cmd cmd, entrylk_type type, dict_t *xdata);
 
 int32_t default_fentrylk_resume (call_frame_t *frame, xlator_t *this,
                           const char *volume, fd_t *fd, const char *basename,
-                          entrylk_cmd cmd, entrylk_type type);
+                          entrylk_cmd cmd, entrylk_type type, dict_t *xdata);
 
 int32_t default_readdir_resume (call_frame_t *frame,
                           xlator_t *this,
                           fd_t *fd,
-                          size_t size, off_t off);
+                          size_t size, off_t off, dict_t *xdata);
 
 int32_t default_readdirp_resume (call_frame_t *frame,
                                  xlator_t *this,
                                  fd_t *fd,
-                                 size_t size, off_t off, dict_t *dict);
+                                 size_t size, off_t off, dict_t *xdata);
 
 int32_t default_xattrop_resume (call_frame_t *frame,
                          xlator_t *this,
                          loc_t *loc,
                          gf_xattrop_flags_t flags,
-                         dict_t *dict);
+                         dict_t *dict, dict_t *xdata);
 
 int32_t default_fxattrop_resume (call_frame_t *frame,
                           xlator_t *this,
                           fd_t *fd,
                           gf_xattrop_flags_t flags,
-                          dict_t *dict);
+                          dict_t *dict, dict_t *xdata);
 int32_t default_rchecksum_resume (call_frame_t *frame,
                                   xlator_t *this,
                                   fd_t *fd, off_t offset,
-                                  int32_t len);
-
-int32_t default_notify (xlator_t *this,
-                        int32_t event,
-                        void *data,
-                        ...);
-
-int32_t default_forget (xlator_t *this,
-                        inode_t *inode);
-
-int32_t default_release (xlator_t *this,
-                         fd_t *fd);
-
-int32_t default_releasedir (xlator_t *this,
-                            fd_t *fd);
+                                  int32_t len, dict_t *xdata);
 
 int32_t default_setattr_resume (call_frame_t *frame,
                          xlator_t *this,
                          loc_t *loc,
                          struct iatt *stbuf,
-                         int32_t valid);
+                         int32_t valid, dict_t *xdata);
 
 int32_t default_fsetattr_resume (call_frame_t *frame,
                           xlator_t *this,
                           fd_t *fd,
                           struct iatt *stbuf,
-                          int32_t valid);
+                          int32_t valid, dict_t *xdata);
 
 /* _cbk */
 
 int32_t
 default_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int32_t op_ret, int32_t op_errno, inode_t *inode,
-                    struct iatt *buf, dict_t *dict, struct iatt *postparent);
+                    struct iatt *buf, dict_t *xdata, struct iatt *postparent);
 
 int32_t
 default_stat_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                  int32_t op_ret, int32_t op_errno, struct iatt *buf);
+                  int32_t op_ret, int32_t op_errno, struct iatt *buf, dict_t *xdata);
 
 
 int32_t
 default_truncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                       int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                      struct iatt *postbuf);
+                      struct iatt *postbuf, dict_t *xdata);
 
 int32_t
 default_ftruncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                        int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                       struct iatt *postbuf);
+                       struct iatt *postbuf, dict_t *xdata);
 
 int32_t
 default_access_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                    int32_t op_ret, int32_t op_errno);
+                    int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 int32_t
 default_readlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                       int32_t op_ret, int32_t op_errno, const char *path,
-                      struct iatt *buf);
+                      struct iatt *buf, dict_t *xdata);
 
 
 int32_t
 default_mknod_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno, inode_t *inode,
                    struct iatt *buf, struct iatt *preparent,
-                   struct iatt *postparent);
+                   struct iatt *postparent, dict_t *xdata);
 
 int32_t
 default_mkdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno, inode_t *inode,
                    struct iatt *buf, struct iatt *preparent,
-                   struct iatt *postparent);
+                   struct iatt *postparent, dict_t *xdata);
 
 int32_t
 default_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int32_t op_ret, int32_t op_errno, struct iatt *preparent,
-                    struct iatt *postparent);
+                    struct iatt *postparent, dict_t *xdata);
 
 int32_t
 default_rmdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno, struct iatt *preparent,
-                   struct iatt *postparent);
+                   struct iatt *postparent, dict_t *xdata);
 
 
 int32_t
 default_symlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                      int32_t op_ret, int32_t op_errno, inode_t *inode,
                      struct iatt *buf, struct iatt *preparent,
-                     struct iatt *postparent);
+                     struct iatt *postparent, dict_t *xdata);
 
 
 int32_t
 default_rename_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int32_t op_ret, int32_t op_errno, struct iatt *buf,
                     struct iatt *preoldparent, struct iatt *postoldparent,
-                    struct iatt *prenewparent, struct iatt *postnewparent);
+                    struct iatt *prenewparent, struct iatt *postnewparent, dict_t *xdata);
 
 
 int32_t
 default_link_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                   int32_t op_ret, int32_t op_errno, inode_t *inode,
                   struct iatt *buf, struct iatt *preparent,
-                  struct iatt *postparent);
+                  struct iatt *postparent, dict_t *xdata);
 
 
 int32_t
 default_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int32_t op_ret, int32_t op_errno, fd_t *fd, inode_t *inode,
                     struct iatt *buf, struct iatt *preparent,
-                    struct iatt *postparent);
+                    struct iatt *postparent, dict_t *xdata);
 
 int32_t
 default_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                  int32_t op_ret, int32_t op_errno, fd_t *fd);
+                  int32_t op_ret, int32_t op_errno, fd_t *fd, dict_t *xdata);
 
 int32_t
 default_readv_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno, struct iovec *vector,
-                   int32_t count, struct iatt *stbuf, struct iobref *iobref);
+                   int32_t count, struct iatt *stbuf, struct iobref *iobref, dict_t *xdata);
 
 
 int32_t
 default_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                    struct iatt *postbuf);
+                    struct iatt *postbuf, dict_t *xdata);
 
 
 int32_t
 default_flush_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                   int32_t op_ret, int32_t op_errno);
+                   int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 
 
 int32_t
 default_fsync_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                   struct iatt *postbuf);
+                   struct iatt *postbuf, dict_t *xdata);
 
 int32_t
 default_fstat_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                   int32_t op_ret, int32_t op_errno, struct iatt *buf);
+                   int32_t op_ret, int32_t op_errno, struct iatt *buf, dict_t *xdata);
 
 int32_t
 default_opendir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno, fd_t *fd);
+                     int32_t op_ret, int32_t op_errno, fd_t *fd, dict_t *xdata);
 
 int32_t
 default_fsyncdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno);
+                      int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 int32_t
 default_statfs_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                    int32_t op_ret, int32_t op_errno, struct statvfs *buf);
+                    int32_t op_ret, int32_t op_errno, struct statvfs *buf, dict_t *xdata);
 
 
 int32_t
 default_setxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno);
+                      int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 
 int32_t
 default_fsetxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                       int32_t op_ret, int32_t op_errno);
+                       int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 
 
 int32_t
 default_fgetxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                       int32_t op_ret, int32_t op_errno, dict_t *dict);
+                       int32_t op_ret, int32_t op_errno, dict_t *dict, dict_t *xdata);
 
 
 int32_t
 default_getxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno, dict_t *dict);
+                      int32_t op_ret, int32_t op_errno, dict_t *dict, dict_t *xdata);
 
 int32_t
 default_xattrop_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno, dict_t *dict);
+                     int32_t op_ret, int32_t op_errno, dict_t *dict, dict_t *xdata);
 
 int32_t
 default_fxattrop_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno, dict_t *dict);
+                      int32_t op_ret, int32_t op_errno, dict_t *dict, dict_t *xdata);
 
 
 int32_t
 default_removexattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                         int32_t op_ret, int32_t op_errno);
+                         int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 int32_t
 default_fremovexattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                          int32_t op_ret, int32_t op_errno);
+                          int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 int32_t
 default_lk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                int32_t op_ret, int32_t op_errno, struct gf_flock *lock);
+                int32_t op_ret, int32_t op_errno, struct gf_flock *lock, dict_t *xdata);
 
 int32_t
 default_inodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno);
+                     int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 
 int32_t
 default_finodelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno);
+                      int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 int32_t
 default_entrylk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno);
+                     int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 int32_t
 default_fentrylk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno);
+                      int32_t op_ret, int32_t op_errno, dict_t *xdata);
 
 
 int32_t
 default_rchecksum_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                        int32_t op_ret, int32_t op_errno, uint32_t weak_checksum,
-                       uint8_t *strong_checksum);
+                       uint8_t *strong_checksum, dict_t *xdata);
 
 
 int32_t
 default_readdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno, gf_dirent_t *entries);
+                     int32_t op_ret, int32_t op_errno, gf_dirent_t *entries, dict_t *xdata);
 
 
 int32_t
 default_readdirp_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int32_t op_ret, int32_t op_errno, gf_dirent_t *entries);
+                      int32_t op_ret, int32_t op_errno, gf_dirent_t *entries, dict_t *xdata);
 
 int32_t
 default_setattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                      int32_t op_ret, int32_t op_errno, struct iatt *statpre,
-                     struct iatt *statpost);
+                     struct iatt *statpost, dict_t *xdata);
 
 int32_t
 default_fsetattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                       int32_t op_ret, int32_t op_errno, struct iatt *statpre,
-                      struct iatt *statpost);
+                      struct iatt *statpost, dict_t *xdata);
 
 int32_t
 default_getspec_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
diff --git a/libglusterfs/src/syncop.c b/libglusterfs/src/syncop.c
index 47bb0137da4..e407ab74d6f 100644
--- a/libglusterfs/src/syncop.c
+++ b/libglusterfs/src/syncop.c
@@ -423,7 +423,7 @@ syncenv_new (size_t stacksize)
 int
 syncop_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int op_ret, int op_errno, inode_t *inode,
-                   struct iatt *iatt, dict_t *xattr, struct iatt *parent)
+                   struct iatt *iatt, dict_t *xdata, struct iatt *parent)
 {
         struct syncargs *args = NULL;
 
@@ -435,8 +435,8 @@ syncop_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         if (op_ret == 0) {
                 args->iatt1  = *iatt;
                 args->iatt2  = *parent;
-                if (xattr)
-                        args->xattr  = dict_ref (xattr);
+                if (xdata)
+                        args->xdata  = dict_ref (xdata);
         }
 
         __wake (args);
@@ -446,22 +446,22 @@ syncop_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
 
 int
-syncop_lookup (xlator_t *subvol, loc_t *loc, dict_t *xattr_req,
-               struct iatt *iatt, dict_t **xattr_rsp, struct iatt *parent)
+syncop_lookup (xlator_t *subvol, loc_t *loc, dict_t *xdata_req,
+               struct iatt *iatt, dict_t **xdata_rsp, struct iatt *parent)
 {
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_lookup_cbk, subvol->fops->lookup,
-                loc, xattr_req);
+                loc, xdata_req);
 
         if (iatt)
                 *iatt = args.iatt1;
         if (parent)
                 *parent = args.iatt2;
-        if (xattr_rsp)
-                *xattr_rsp = args.xattr;
-        else if (args.xattr)
-                dict_unref (args.xattr);
+        if (xdata_rsp)
+                *xdata_rsp = args.xdata;
+        else if (args.xdata)
+                dict_unref (args.xdata);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -488,7 +488,7 @@ syncop_readdirp_cbk (call_frame_t *frame,
                      xlator_t *this,
                      int32_t op_ret,
                      int32_t op_errno,
-                     gf_dirent_t *entries)
+                     gf_dirent_t *entries, dict_t *xdata)
 {
         struct syncargs *args = NULL;
         gf_dirent_t *entry = NULL;
@@ -548,7 +548,7 @@ syncop_readdir_cbk (call_frame_t *frame,
                     xlator_t *this,
                     int32_t op_ret,
                     int32_t op_errno,
-                    gf_dirent_t *entries)
+                    gf_dirent_t *entries, dict_t *xdata)
 {
         struct syncargs *args = NULL;
         gf_dirent_t *entry = NULL;
@@ -590,7 +590,7 @@ syncop_readdir (xlator_t *subvol,
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_readdir_cbk, subvol->fops->readdir,
-                fd, size, off);
+                fd, size, off, NULL);
 
         if (entries)
                 list_splice_init (&args.entries.list, &entries->list);
@@ -607,7 +607,7 @@ syncop_opendir_cbk (call_frame_t *frame,
                     xlator_t *this,
                     int32_t op_ret,
                     int32_t op_errno,
-                    fd_t *fd)
+                    fd_t *fd, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -629,7 +629,7 @@ syncop_opendir (xlator_t *subvol,
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_opendir_cbk, subvol->fops->opendir,
-                loc, fd);
+                loc, fd, NULL);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -638,7 +638,7 @@ syncop_opendir (xlator_t *subvol,
 
 int
 syncop_removexattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                        int op_ret, int op_errno)
+                        int op_ret, int op_errno, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -658,7 +658,7 @@ syncop_removexattr (xlator_t *subvol, loc_t *loc, const char *name)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_removexattr_cbk, subvol->fops->removexattr,
-                loc, name);
+                loc, name, NULL);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -666,7 +666,7 @@ syncop_removexattr (xlator_t *subvol, loc_t *loc, const char *name)
 
 int
 syncop_fremovexattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                         int op_ret, int op_errno)
+                         int op_ret, int op_errno, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -686,7 +686,7 @@ syncop_fremovexattr (xlator_t *subvol, fd_t *fd, const char *name)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_fremovexattr_cbk,
-                subvol->fops->fremovexattr, fd, name);
+                subvol->fops->fremovexattr, fd, name, NULL);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -694,7 +694,7 @@ syncop_fremovexattr (xlator_t *subvol, fd_t *fd, const char *name)
 
 int
 syncop_setxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int op_ret, int op_errno)
+                     int op_ret, int op_errno, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -715,7 +715,7 @@ syncop_setxattr (xlator_t *subvol, loc_t *loc, dict_t *dict, int32_t flags)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_setxattr_cbk, subvol->fops->setxattr,
-                loc, dict, flags);
+                loc, dict, flags, NULL);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -723,7 +723,7 @@ syncop_setxattr (xlator_t *subvol, loc_t *loc, dict_t *dict, int32_t flags)
 
 int
 syncop_fsetxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                      int op_ret, int op_errno)
+                      int op_ret, int op_errno, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -744,7 +744,7 @@ syncop_fsetxattr (xlator_t *subvol, fd_t *fd, dict_t *dict, int32_t flags)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_fsetxattr_cbk, subvol->fops->fsetxattr,
-                fd, dict, flags);
+                fd, dict, flags, NULL);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -752,7 +752,7 @@ syncop_fsetxattr (xlator_t *subvol, fd_t *fd, dict_t *dict, int32_t flags)
 
 int
 syncop_getxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                     int op_ret, int op_errno, dict_t *dict)
+                     int op_ret, int op_errno, dict_t *dict, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -774,7 +774,7 @@ syncop_listxattr (xlator_t *subvol, loc_t *loc, dict_t **dict)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_getxattr_cbk, subvol->fops->getxattr,
-                loc, NULL);
+                loc, NULL, NULL);
 
         if (dict)
                 *dict = args.xattr;
@@ -791,7 +791,7 @@ syncop_getxattr (xlator_t *subvol, loc_t *loc, dict_t **dict, const char *key)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_getxattr_cbk, subvol->fops->getxattr,
-                loc, key);
+                loc, key, NULL);
 
         if (dict)
                 *dict = args.xattr;
@@ -808,7 +808,7 @@ syncop_fgetxattr (xlator_t *subvol, fd_t *fd, dict_t **dict, const char *key)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_getxattr_cbk, subvol->fops->fgetxattr,
-                fd, key);
+                fd, key, NULL);
 
         if (dict)
                 *dict = args.xattr;
@@ -822,7 +822,7 @@ syncop_fgetxattr (xlator_t *subvol, fd_t *fd, dict_t **dict, const char *key)
 int
 syncop_statfs_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno,
-                   struct statvfs *buf)
+                   struct statvfs *buf, dict_t *xdata)
 
 {
         struct syncargs *args = NULL;
@@ -849,7 +849,7 @@ syncop_statfs (xlator_t *subvol, loc_t *loc, struct statvfs *buf)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_statfs_cbk, subvol->fops->statfs,
-                loc);
+                loc, NULL);
 
         if (buf)
                 *buf = args.statvfs_buf;
@@ -861,7 +861,7 @@ syncop_statfs (xlator_t *subvol, loc_t *loc, struct statvfs *buf)
 int
 syncop_setattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int op_ret, int op_errno,
-                    struct iatt *preop, struct iatt *postop)
+                    struct iatt *preop, struct iatt *postop, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -888,7 +888,7 @@ syncop_setattr (xlator_t *subvol, loc_t *loc, struct iatt *iatt, int valid,
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_setattr_cbk, subvol->fops->setattr,
-                loc, iatt, valid);
+                loc, iatt, valid, NULL);
 
         if (preop)
                 *preop = args.iatt1;
@@ -907,7 +907,7 @@ syncop_fsetattr (xlator_t *subvol, fd_t *fd, struct iatt *iatt, int valid,
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_setattr_cbk, subvol->fops->fsetattr,
-                fd, iatt, valid);
+                fd, iatt, valid, NULL);
 
         if (preop)
                 *preop = args.iatt1;
@@ -921,7 +921,7 @@ syncop_fsetattr (xlator_t *subvol, fd_t *fd, struct iatt *iatt, int valid,
 
 int32_t
 syncop_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                 int32_t op_ret, int32_t op_errno, fd_t *fd)
+                 int32_t op_ret, int32_t op_errno, fd_t *fd, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -944,7 +944,7 @@ syncop_open (xlator_t *subvol, loc_t *loc, int32_t flags, fd_t *fd)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_open_cbk, subvol->fops->open,
-                loc, flags, fd, 0);
+                loc, flags, fd, NULL);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -955,7 +955,8 @@ syncop_open (xlator_t *subvol, loc_t *loc, int32_t flags, fd_t *fd)
 int32_t
 syncop_readv_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                   int32_t op_ret, int32_t op_errno, struct iovec *vector,
-                  int32_t count, struct iatt *stbuf, struct iobref *iobref)
+                  int32_t count, struct iatt *stbuf, struct iobref *iobref,
+                  dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -987,7 +988,7 @@ syncop_readv (xlator_t *subvol, fd_t *fd, size_t size, off_t off,
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_readv_cbk, subvol->fops->readv,
-                fd, size, off, flags);
+                fd, size, off, flags, NULL);
 
         if (vector)
                 *vector = args.vector;
@@ -1011,7 +1012,7 @@ syncop_readv (xlator_t *subvol, fd_t *fd, size_t size, off_t off,
 int
 syncop_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int op_ret, int op_errno, struct iatt *prebuf,
-                   struct iatt *postbuf)
+                   struct iatt *postbuf, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -1033,7 +1034,7 @@ syncop_writev (xlator_t *subvol, fd_t *fd, struct iovec *vector,
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_writev_cbk, subvol->fops->writev,
-                fd, vector, count, offset, flags, iobref);
+                fd, vector, count, offset, flags, iobref, NULL);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -1049,7 +1050,7 @@ int syncop_write (xlator_t *subvol, fd_t *fd, const char *buf, int size,
         vec.iov_base = (void *)buf;
 
         SYNCOP (subvol, (&args), syncop_writev_cbk, subvol->fops->writev,
-                fd, &vec, 1, offset, flags, iobref);
+                fd, &vec, 1, offset, flags, iobref, NULL);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -1068,7 +1069,7 @@ int32_t
 syncop_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int32_t op_ret, int32_t op_errno, fd_t *fd, inode_t *inode,
                    struct iatt *buf, struct iatt *preparent,
-                   struct iatt *postparent)
+                   struct iatt *postparent, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -1087,12 +1088,12 @@ syncop_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
 int
 syncop_create (xlator_t *subvol, loc_t *loc, int32_t flags, mode_t mode,
-               fd_t *fd, dict_t *dict)
+               fd_t *fd, dict_t *xdata)
 {
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_create_cbk, subvol->fops->create,
-                loc, flags, mode, fd, dict);
+                loc, flags, mode, 0, fd, xdata);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -1102,7 +1103,7 @@ syncop_create (xlator_t *subvol, loc_t *loc, int32_t flags, mode_t mode,
 int
 syncop_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                    int op_ret, int op_errno, struct iatt *preparent,
-                   struct iatt *postparent)
+                   struct iatt *postparent, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -1121,7 +1122,8 @@ syncop_unlink (xlator_t *subvol, loc_t *loc)
 {
         struct syncargs args = {0, };
 
-        SYNCOP (subvol, (&args), syncop_unlink_cbk, subvol->fops->unlink, loc);
+        SYNCOP (subvol, (&args), syncop_unlink_cbk, subvol->fops->unlink, loc,
+                0, NULL);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -1131,7 +1133,7 @@ int
 syncop_link_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                   int32_t op_ret, int32_t op_errno, inode_t *inode,
                   struct iatt *buf, struct iatt *preparent,
-                  struct iatt *postparent)
+                 struct iatt *postparent, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -1152,7 +1154,7 @@ syncop_link (xlator_t *subvol, loc_t *oldloc, loc_t *newloc)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_link_cbk, subvol->fops->link,
-                oldloc, newloc);
+                oldloc, newloc, NULL);
 
         errno = args.op_errno;
 
@@ -1162,7 +1164,7 @@ syncop_link (xlator_t *subvol, loc_t *oldloc, loc_t *newloc)
 int
 syncop_ftruncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                       int op_ret, int op_errno, struct iatt *prebuf,
-                      struct iatt *postbuf)
+                      struct iatt *postbuf, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -1182,7 +1184,7 @@ syncop_ftruncate (xlator_t *subvol, fd_t *fd, off_t offset)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_ftruncate_cbk, subvol->fops->ftruncate,
-                fd, offset);
+                fd, offset, NULL);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -1194,7 +1196,7 @@ syncop_truncate (xlator_t *subvol, loc_t *loc, off_t offset)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_ftruncate_cbk, subvol->fops->truncate,
-                loc, offset);
+                loc, offset, NULL);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -1203,7 +1205,7 @@ syncop_truncate (xlator_t *subvol, loc_t *loc, off_t offset)
 int
 syncop_fsync_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                   int32_t op_ret, int32_t op_errno,
-                  struct iatt *prebuf, struct iatt *postbuf)
+                  struct iatt *prebuf, struct iatt *postbuf, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -1224,7 +1226,7 @@ syncop_fsync (xlator_t *subvol, fd_t *fd)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_fsync_cbk, subvol->fops->fsync,
-                fd, 0);
+                fd, 0, NULL);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -1233,7 +1235,7 @@ syncop_fsync (xlator_t *subvol, fd_t *fd)
 
 int
 syncop_fstat_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                  int32_t op_ret, int32_t op_errno, struct iatt *stbuf)
+                  int32_t op_ret, int32_t op_errno, struct iatt *stbuf, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -1256,7 +1258,7 @@ syncop_fstat (xlator_t *subvol, fd_t *fd, struct iatt *stbuf)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_fstat_cbk, subvol->fops->fstat,
-                fd);
+                fd, NULL);
 
         if (stbuf)
                 *stbuf = args.iatt1;
@@ -1272,7 +1274,7 @@ syncop_stat (xlator_t *subvol, loc_t *loc, struct iatt *stbuf)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_fstat_cbk, subvol->fops->stat,
-                loc);
+                loc, NULL);
 
         if (stbuf)
                 *stbuf = args.iatt1;
@@ -1286,7 +1288,7 @@ int32_t
 syncop_symlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                     int32_t op_ret, int32_t op_errno, inode_t *inode,
                     struct iatt *buf, struct iatt *preparent,
-                    struct iatt *postparent)
+                    struct iatt *postparent, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -1306,7 +1308,7 @@ syncop_symlink (xlator_t *subvol, loc_t *loc, char *newpath, dict_t *dict)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_symlink_cbk, subvol->fops->symlink,
-                newpath, loc, dict);
+                newpath, loc, 0, dict);
 
         errno = args.op_errno;
         return args.op_ret;
@@ -1316,7 +1318,7 @@ syncop_symlink (xlator_t *subvol, loc_t *loc, char *newpath, dict_t *dict)
 int
 syncop_readlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                      int op_ret, int op_errno, const char *path,
-                     struct iatt *stbuf)
+                     struct iatt *stbuf, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -1339,7 +1341,7 @@ syncop_readlink (xlator_t *subvol, loc_t *loc, char **buffer, size_t size)
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_readlink_cbk, subvol->fops->readlink,
-                loc, size);
+                loc, size, NULL);
 
         if (buffer)
                 *buffer = args.buffer;
@@ -1354,7 +1356,7 @@ int
 syncop_mknod_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
                   int32_t op_ret, int32_t op_errno, inode_t *inode,
                   struct iatt *buf, struct iatt *preparent,
-                  struct iatt *postparent)
+                  struct iatt *postparent, dict_t *xdata)
 {
         struct syncargs *args = NULL;
 
@@ -1375,7 +1377,7 @@ syncop_mknod (xlator_t *subvol, loc_t *loc, mode_t mode, dev_t rdev,
         struct syncargs args = {0, };
 
         SYNCOP (subvol, (&args), syncop_mknod_cbk, subvol->fops->mknod,
-                loc, mode, rdev, dict);
+                loc, mode, rdev, 0, dict);
 
         errno = args.op_errno;
         return args.op_ret;
diff --git a/libglusterfs/src/syncop.h b/libglusterfs/src/syncop.h
index 69bd1d770a4..f095319c4d9 100644
--- a/libglusterfs/src/syncop.h
+++ b/libglusterfs/src/syncop.h
@@ -112,6 +112,7 @@ struct syncargs {
         int                 count;
         struct iobref      *iobref;
         char               *buffer;
+        dict_t             *xdata;
 
         /* some more _cbk needs */
         uuid_t              uuid;
diff --git a/libglusterfs/src/xlator.h b/libglusterfs/src/xlator.h
index c0b56a7b0c2..bad328f6c24 100644
--- a/libglusterfs/src/xlator.h
+++ b/libglusterfs/src/xlator.h
@@ -106,7 +106,8 @@ typedef int32_t (*fop_rchecksum_cbk_t) (call_frame_t *frame,
                                         int32_t op_ret,
                                         int32_t op_errno,
                                         uint32_t weak_checksum,
-                                        uint8_t *strong_checksum);
+                                        uint8_t *strong_checksum,
+                                        dict_t *xdata);
 
 
 typedef int32_t (*fop_getspec_t) (call_frame_t *frame,
@@ -117,7 +118,7 @@ typedef int32_t (*fop_getspec_t) (call_frame_t *frame,
 typedef int32_t (*fop_rchecksum_t) (call_frame_t *frame,
                                     xlator_t *this,
                                     fd_t *fd, off_t offset,
-                                    int32_t len);
+                                    int32_t len, dict_t *xdata);
 
 
 typedef int32_t (*fop_lookup_cbk_t) (call_frame_t *frame,
@@ -127,7 +128,7 @@ typedef int32_t (*fop_lookup_cbk_t) (call_frame_t *frame,
                                      int32_t op_errno,
                                      inode_t *inode,
                                      struct iatt *buf,
-                                     dict_t *xattr,
+                                     dict_t *xdata,
                                      struct iatt *postparent);
 
 typedef int32_t (*fop_stat_cbk_t) (call_frame_t *frame,
@@ -135,14 +136,14 @@ typedef int32_t (*fop_stat_cbk_t) (call_frame_t *frame,
                                    xlator_t *this,
                                    int32_t op_ret,
                                    int32_t op_errno,
-                                   struct iatt *buf);
+                                   struct iatt *buf, dict_t *xdata);
 
 typedef int32_t (*fop_fstat_cbk_t) (call_frame_t *frame,
                                     void *cookie,
                                     xlator_t *this,
                                     int32_t op_ret,
                                     int32_t op_errno,
-                                    struct iatt *buf);
+                                    struct iatt *buf, dict_t *xdata);
 
 typedef int32_t (*fop_truncate_cbk_t) (call_frame_t *frame,
                                        void *cookie,
@@ -150,7 +151,7 @@ typedef int32_t (*fop_truncate_cbk_t) (call_frame_t *frame,
                                        int32_t op_ret,
                                        int32_t op_errno,
                                        struct iatt *prebuf,
-                                       struct iatt *postbuf);
+                                       struct iatt *postbuf, dict_t *xdata);
 
 typedef int32_t (*fop_ftruncate_cbk_t) (call_frame_t *frame,
                                         void *cookie,
@@ -158,13 +159,13 @@ typedef int32_t (*fop_ftruncate_cbk_t) (call_frame_t *frame,
                                         int32_t op_ret,
                                         int32_t op_errno,
                                         struct iatt *prebuf,
-                                        struct iatt *postbuf);
+                                        struct iatt *postbuf, dict_t *xdata);
 
 typedef int32_t (*fop_access_cbk_t) (call_frame_t *frame,
                                      void *cookie,
                                      xlator_t *this,
                                      int32_t op_ret,
-                                     int32_t op_errno);
+                                     int32_t op_errno, dict_t *xdata);
 
 typedef int32_t (*fop_readlink_cbk_t) (call_frame_t *frame,
                                        void *cookie,
@@ -172,7 +173,7 @@ typedef int32_t (*fop_readlink_cbk_t) (call_frame_t *frame,
                                        int32_t op_ret,
                                        int32_t op_errno,
                                        const char *path,
-                                       struct iatt *buf);
+                                       struct iatt *buf, dict_t *xdata);
 
 typedef int32_t (*fop_mknod_cbk_t) (call_frame_t *frame,
                                     void *cookie,
@@ -182,7 +183,7 @@ typedef int32_t (*fop_mknod_cbk_t) (call_frame_t *frame,
                                     inode_t *inode,
                                     struct iatt *buf,
                                     struct iatt *preparent,
-                                    struct iatt *postparent);
+                                    struct iatt *postparent, dict_t *xdata);
 
 typedef int32_t (*fop_mkdir_cbk_t) (call_frame_t *frame,
                                     void *cookie,
@@ -192,7 +193,7 @@ typedef int32_t (*fop_mkdir_cbk_t) (call_frame_t *frame,
                                     inode_t *inode,
                                     struct iatt *buf,
                                     struct iatt *preparent,
-                                    struct iatt *postparent);
+                                    struct iatt *postparent, dict_t *xdata);
 
 typedef int32_t (*fop_unlink_cbk_t) (call_frame_t *frame,
                                      void *cookie,
@@ -200,7 +201,7 @@ typedef int32_t (*fop_unlink_cbk_t) (call_frame_t *frame,
                                      int32_t op_ret,
                                      int32_t op_errno,
                                      struct iatt *preparent,
-                                     struct iatt *postparent);
+                                     struct iatt *postparent, dict_t *xdata);
 
 typedef int32_t (*fop_rmdir_cbk_t) (call_frame_t *frame,
                                     void *cookie,
@@ -208,7 +209,7 @@ typedef int32_t (*fop_rmdir_cbk_t) (call_frame_t *frame,
                                     int32_t op_ret,
                                     int32_t op_errno,
                                     struct iatt *preparent,
-                                    struct iatt *postparent);
+                                    struct iatt *postparent, dict_t *xdata);
 
 typedef int32_t (*fop_symlink_cbk_t) (call_frame_t *frame,
                                       void *cookie,
@@ -218,7 +219,7 @@ typedef int32_t (*fop_symlink_cbk_t) (call_frame_t *frame,
                                       inode_t *inode,
                                       struct iatt *buf,
                                       struct iatt *preparent,
-                                      struct iatt *postparent);
+                                      struct iatt *postparent, dict_t *xdata);
 
 typedef int32_t (*fop_rename_cbk_t) (call_frame_t *frame,
                                      void *cookie,
@@ -229,7 +230,7 @@ typedef int32_t (*fop_rename_cbk_t) (call_frame_t *frame,
                                      struct iatt *preoldparent,
                                      struct iatt *postoldparent,
                                      struct iatt *prenewparent,
-                                     struct iatt *postnewparent);
+                                     struct iatt *postnewparent, dict_t *xdata);
 
 typedef int32_t (*fop_link_cbk_t) (call_frame_t *frame,
                                    void *cookie,
@@ -239,7 +240,7 @@ typedef int32_t (*fop_link_cbk_t) (call_frame_t *frame,
                                    inode_t *inode,
                                    struct iatt *buf,
                                    struct iatt *preparent,
-                                   struct iatt *postparent);
+                                   struct iatt *postparent, dict_t *xdata);
 
 typedef int32_t (*fop_create_cbk_t) (call_frame_t *frame,
                                      void *cookie,
@@ -250,14 +251,14 @@ typedef int32_t (*fop_create_cbk_t) (call_frame_t *frame,
                                      inode_t *inode,
                                      struct iatt *buf,
                                      struct iatt *preparent,
-                                     struct iatt *postparent);
+                                     struct iatt *postparent, dict_t *xdata);
 
 typedef int32_t (*fop_open_cbk_t) (call_frame_t *frame,
                                    void *cookie,
                                    xlator_t *this,
                                    int32_t op_ret,
                                    int32_t op_errno,
-                                   fd_t *fd);
+                                   fd_t *fd, dict_t *xdata);
 
 typedef int32_t (*fop_readv_cbk_t) (call_frame_t *frame,
                                     void *cookie,
@@ -267,7 +268,7 @@ typedef int32_t (*fop_readv_cbk_t) (call_frame_t *frame,
                                     struct iovec *vector,
                                     int32_t count,
                                     struct iatt *stbuf,
-                                    struct iobref *iobref);
+                                    struct iobref *iobref, dict_t *xdata);
 
 typedef int32_t (*fop_writev_cbk_t) (call_frame_t *frame,
                                      void *cookie,
@@ -275,13 +276,13 @@ typedef int32_t (*fop_writev_cbk_t) (call_frame_t *frame,
                                      int32_t op_ret,
                                      int32_t op_errno,
                                      struct iatt *prebuf,
-                                     struct iatt *postbuf);
+                                     struct iatt *postbuf, dict_t *xdata);
 
 typedef int32_t (*fop_flush_cbk_t) (call_frame_t *frame,
                                     void *cookie,
                                     xlator_t *this,
                                     int32_t op_ret,
-                                    int32_t op_errno);
+                                    int32_t op_errno, dict_t *xdata);
 
 typedef int32_t (*fop_fsync_cbk_t) (call_frame_t *frame,
                                     void *cookie,
@@ -289,124 +290,124 @@ typedef int32_t (*fop_fsync_cbk_t) (call_frame_t *frame,
                                     int32_t op_ret,
                                     int32_t op_errno,
                                     struct iatt *prebuf,
-                                    struct iatt *postbuf);
+                                    struct iatt *postbuf, dict_t *xdata);
 
 typedef int32_t (*fop_opendir_cbk_t) (call_frame_t *frame,
                                       void *cookie,
                                       xlator_t *this,
                                       int32_t op_ret,
                                       int32_t op_errno,
-                                      fd_t *fd);
+                                      fd_t *fd, dict_t *xdata);
 
 typedef int32_t (*fop_fsyncdir_cbk_t) (call_frame_t *frame,
                                        void *cookie,
                                        xlator_t *this,
                                        int32_t op_ret,
-                                       int32_t op_errno);
+                                       int32_t op_errno, dict_t *xdata);
 
 typedef int32_t (*fop_statfs_cbk_t) (call_frame_t *frame,
                                      void *cookie,
                                      xlator_t *this,
                                      int32_t op_ret,
                                      int32_t op_errno,
-                                     struct statvfs *buf);
+                                     struct statvfs *buf, dict_t *xdata);
 
 typedef int32_t (*fop_setxattr_cbk_t) (call_frame_t *frame,
                                        void *cookie,
                                        xlator_t *this,
                                        int32_t op_ret,
-                                       int32_t op_errno);
+                                       int32_t op_errno, dict_t *xdata);
 
 typedef int32_t (*fop_getxattr_cbk_t) (call_frame_t *frame,
                                        void *cookie,
                                        xlator_t *this,
                                        int32_t op_ret,
                                        int32_t op_errno,
-                                       dict_t *dict);
+                                       dict_t *dict, dict_t *xdata);
 
 typedef int32_t (*fop_fsetxattr_cbk_t) (call_frame_t *frame,
                                         void *cookie,
                                         xlator_t *this,
                                         int32_t op_ret,
-                                        int32_t op_errno);
+                                        int32_t op_errno, dict_t *xdata);
 
 typedef int32_t (*fop_fgetxattr_cbk_t) (call_frame_t *frame,
                                         void *cookie,
                                         xlator_t *this,
                                         int32_t op_ret,
                                         int32_t op_errno,
-                                        dict_t *dict);
+                                        dict_t *dict, dict_t *xdata);
 
 typedef int32_t (*fop_removexattr_cbk_t) (call_frame_t *frame,
                                           void *cookie,
                                           xlator_t *this,
                                           int32_t op_ret,
-                                          int32_t op_errno);
+                                          int32_t op_errno, dict_t *xdata);
 
 typedef int32_t (*fop_fremovexattr_cbk_t) (call_frame_t *frame,
                                            void *cookie,
                                            xlator_t *this,
                                            int32_t op_ret,
-                                           int32_t op_errno);
+                                           int32_t op_errno, dict_t *xdata);
 
 typedef int32_t (*fop_lk_cbk_t) (call_frame_t *frame,
                                  void *cookie,
                                  xlator_t *this,
                                  int32_t op_ret,
                                  int32_t op_errno,
-                                 struct gf_flock *flock);
+                                 struct gf_flock *flock, dict_t *xdata);
 
 typedef int32_t (*fop_inodelk_cbk_t) (call_frame_t *frame,
                                       void *cookie,
                                       xlator_t *this,
                                       int32_t op_ret,
-                                      int32_t op_errno);
+                                      int32_t op_errno, dict_t *xdata);
 
 typedef int32_t (*fop_finodelk_cbk_t) (call_frame_t *frame,
                                        void *cookie,
                                        xlator_t *this,
                                        int32_t op_ret,
-                                       int32_t op_errno);
+                                       int32_t op_errno, dict_t *xdata);
 
 typedef int32_t (*fop_entrylk_cbk_t) (call_frame_t *frame,
                                       void *cookie,
                                       xlator_t *this,
                                       int32_t op_ret,
-                                      int32_t op_errno);
+                                      int32_t op_errno, dict_t *xdata);
 
 typedef int32_t (*fop_fentrylk_cbk_t) (call_frame_t *frame,
                                        void *cookie,
                                        xlator_t *this,
                                        int32_t op_ret,
-                                       int32_t op_errno);
+                                       int32_t op_errno, dict_t *xdata);
 
 typedef int32_t (*fop_readdir_cbk_t) (call_frame_t *frame,
                                       void *cookie,
                                       xlator_t *this,
                                       int32_t op_ret,
                                       int32_t op_errno,
-                                      gf_dirent_t *entries);
+                                      gf_dirent_t *entries, dict_t *xdata);
 
 typedef int32_t (*fop_readdirp_cbk_t) (call_frame_t *frame,
                                        void *cookie,
                                        xlator_t *this,
                                        int32_t op_ret,
                                        int32_t op_errno,
-                                       gf_dirent_t *entries);
+                                       gf_dirent_t *entries, dict_t *xdata);
 
 typedef int32_t (*fop_xattrop_cbk_t) (call_frame_t *frame,
                                       void *cookie,
                                       xlator_t *this,
                                       int32_t op_ret,
                                       int32_t op_errno,
-                                      dict_t *xattr);
+                                      dict_t *xattr, dict_t *xdata);
 
 typedef int32_t (*fop_fxattrop_cbk_t) (call_frame_t *frame,
                                        void *cookie,
                                        xlator_t *this,
                                        int32_t op_ret,
                                        int32_t op_errno,
-                                       dict_t *xattr);
+                                       dict_t *xattr, dict_t *xdata);
 
 
 typedef int32_t (*fop_setattr_cbk_t) (call_frame_t *frame,
@@ -415,7 +416,7 @@ typedef int32_t (*fop_setattr_cbk_t) (call_frame_t *frame,
                                       int32_t op_ret,
                                       int32_t op_errno,
                                       struct iatt *preop_stbuf,
-                                      struct iatt *postop_stbuf);
+                                      struct iatt *postop_stbuf, dict_t *xdata);
 
 typedef int32_t (*fop_fsetattr_cbk_t) (call_frame_t *frame,
                                        void *cookie,
@@ -423,72 +424,71 @@ typedef int32_t (*fop_fsetattr_cbk_t) (call_frame_t *frame,
                                        int32_t op_ret,
                                        int32_t op_errno,
                                        struct iatt *preop_stbuf,
-                                       struct iatt *postop_stbuf);
+                                       struct iatt *postop_stbuf, dict_t *xdata);
 
 typedef int32_t (*fop_lookup_t) (call_frame_t *frame,
                                  xlator_t *this,
                                  loc_t *loc,
-                                 dict_t *xattr_req);
+                                 dict_t *xdata);
 
 typedef int32_t (*fop_stat_t) (call_frame_t *frame,
                                xlator_t *this,
-                               loc_t *loc);
+                               loc_t *loc, dict_t *xdata);
 
 typedef int32_t (*fop_fstat_t) (call_frame_t *frame,
                                 xlator_t *this,
-                                fd_t *fd);
+                                fd_t *fd, dict_t *xdata);
 
 typedef int32_t (*fop_truncate_t) (call_frame_t *frame,
                                    xlator_t *this,
                                    loc_t *loc,
-                                   off_t offset);
+                                   off_t offset, dict_t *xdata);
 
 typedef int32_t (*fop_ftruncate_t) (call_frame_t *frame,
                                     xlator_t *this,
                                     fd_t *fd,
-                                    off_t offset);
+                                    off_t offset, dict_t *xdata);
 
 typedef int32_t (*fop_access_t) (call_frame_t *frame,
                                  xlator_t *this,
                                  loc_t *loc,
-                                 int32_t mask);
+                                 int32_t mask, dict_t *xdata);
 
 typedef int32_t (*fop_readlink_t) (call_frame_t *frame,
                                    xlator_t *this,
                                    loc_t *loc,
-                                   size_t size);
+                                   size_t size, dict_t *xdata);
 
 typedef int32_t (*fop_mknod_t) (call_frame_t *frame, xlator_t *this,
                                 loc_t *loc, mode_t mode, dev_t rdev,
-                                dict_t *params);
+                                mode_t umask, dict_t *xdata);
 
-typedef int32_t (*fop_mkdir_t) (call_frame_t *frame, xlator_t *this,
-                                loc_t *loc, mode_t mode, dict_t *params);
+typedef int32_t (*fop_mkdir_t) (call_frame_t *frame, xlator_t *this, loc_t *loc,
+                                mode_t mode, mode_t umask, dict_t *xdata);
 
-typedef int32_t (*fop_unlink_t) (call_frame_t *frame,
-                                 xlator_t *this,
-                                 loc_t *loc);
+typedef int32_t (*fop_unlink_t) (call_frame_t *frame, xlator_t *this,
+                                 loc_t *loc, int xflags, dict_t *xdata);
 
 typedef int32_t (*fop_rmdir_t) (call_frame_t *frame, xlator_t *this,
-                                loc_t *loc, int flags);
+                                loc_t *loc, int xflags, dict_t *xdata);
 
 typedef int32_t (*fop_symlink_t) (call_frame_t *frame, xlator_t *this,
                                   const char *linkname, loc_t *loc,
-                                  dict_t *params);
+                                  mode_t umask, dict_t *xdata);
 
 typedef int32_t (*fop_rename_t) (call_frame_t *frame,
                                  xlator_t *this,
                                  loc_t *oldloc,
-                                 loc_t *newloc);
+                                 loc_t *newloc, dict_t *xdata);
 
 typedef int32_t (*fop_link_t) (call_frame_t *frame,
                                xlator_t *this,
                                loc_t *oldloc,
-                               loc_t *newloc);
+                               loc_t *newloc, dict_t *xdata);
 
 typedef int32_t (*fop_create_t) (call_frame_t *frame, xlator_t *this,
                                  loc_t *loc, int32_t flags, mode_t mode,
-                                 fd_t *fd, dict_t *params);
+                                 mode_t umask, fd_t *fd, dict_t *xdata);
 
 /* Tell subsequent writes on the fd_t to fsync after every writev fop without
  * requiring a fsync fop.
@@ -499,19 +499,16 @@ typedef int32_t (*fop_create_t) (call_frame_t *frame, xlator_t *this,
  */
 #define GF_OPEN_NOWB    0x02
 
-typedef int32_t (*fop_open_t) (call_frame_t *frame,
-                               xlator_t *this,
-                               loc_t *loc,
-                               int32_t flags,
-                               fd_t *fd,
-                               int32_t wbflags);
+typedef int32_t (*fop_open_t) (call_frame_t *frame, xlator_t *this,
+                               loc_t *loc, int32_t flags,
+                               fd_t *fd, dict_t *xdata);
 
 typedef int32_t (*fop_readv_t) (call_frame_t *frame,
                                 xlator_t *this,
                                 fd_t *fd,
                                 size_t size,
                                 off_t offset,
-                                uint32_t flags);
+                                uint32_t flags, dict_t *xdata);
 
 typedef int32_t (*fop_writev_t) (call_frame_t *frame,
                                  xlator_t *this,
@@ -520,131 +517,131 @@ typedef int32_t (*fop_writev_t) (call_frame_t *frame,
                                  int32_t count,
                                  off_t offset,
                                  uint32_t flags,
-                                 struct iobref *iobref);
+                                 struct iobref *iobref, dict_t *xdata);
 
 typedef int32_t (*fop_flush_t) (call_frame_t *frame,
                                 xlator_t *this,
-                                fd_t *fd);
+                                fd_t *fd, dict_t *xdata);
 
 typedef int32_t (*fop_fsync_t) (call_frame_t *frame,
                                 xlator_t *this,
                                 fd_t *fd,
-                                int32_t datasync);
+                                int32_t datasync, dict_t *xdata);
 
 typedef int32_t (*fop_opendir_t) (call_frame_t *frame,
                                   xlator_t *this,
                                   loc_t *loc,
-                                  fd_t *fd);
+                                  fd_t *fd, dict_t *xdata);
 
 typedef int32_t (*fop_fsyncdir_t) (call_frame_t *frame,
                                    xlator_t *this,
                                    fd_t *fd,
-                                   int32_t datasync);
+                                   int32_t datasync, dict_t *xdata);
 
 typedef int32_t (*fop_statfs_t) (call_frame_t *frame,
                                  xlator_t *this,
-                                 loc_t *loc);
+                                 loc_t *loc, dict_t *xdata);
 
 typedef int32_t (*fop_setxattr_t) (call_frame_t *frame,
                                    xlator_t *this,
                                    loc_t *loc,
                                    dict_t *dict,
-                                   int32_t flags);
+                                   int32_t flags, dict_t *xdata);
 
 typedef int32_t (*fop_getxattr_t) (call_frame_t *frame,
                                    xlator_t *this,
                                    loc_t *loc,
-                                   const char *name);
+                                   const char *name, dict_t *xdata);
 
 typedef int32_t (*fop_fsetxattr_t) (call_frame_t *frame,
                                     xlator_t *this,
                                     fd_t *fd,
                                     dict_t *dict,
-                                    int32_t flags);
+                                    int32_t flags, dict_t *xdata);
 
 typedef int32_t (*fop_fgetxattr_t) (call_frame_t *frame,
                                     xlator_t *this,
                                     fd_t *fd,
-                                    const char *name);
+                                    const char *name, dict_t *xdata);
 
 typedef int32_t (*fop_removexattr_t) (call_frame_t *frame,
                                       xlator_t *this,
                                       loc_t *loc,
-                                      const char *name);
+                                      const char *name, dict_t *xdata);
 
 typedef int32_t (*fop_fremovexattr_t) (call_frame_t *frame,
                                        xlator_t *this,
                                        fd_t *fd,
-                                       const char *name);
+                                       const char *name, dict_t *xdata);
 
 typedef int32_t (*fop_lk_t) (call_frame_t *frame,
                              xlator_t *this,
                              fd_t *fd,
                              int32_t cmd,
-                             struct gf_flock *flock);
+                             struct gf_flock *flock, dict_t *xdata);
 
 typedef int32_t (*fop_inodelk_t) (call_frame_t *frame,
                                   xlator_t *this,
                                   const char *volume,
                                   loc_t *loc,
                                   int32_t cmd,
-                                  struct gf_flock *flock);
+                                  struct gf_flock *flock, dict_t *xdata);
 
 typedef int32_t (*fop_finodelk_t) (call_frame_t *frame,
                                    xlator_t *this,
                                    const char *volume,
                                    fd_t *fd,
                                    int32_t cmd,
-                                   struct gf_flock *flock);
+                                   struct gf_flock *flock, dict_t *xdata);
 
 typedef int32_t (*fop_entrylk_t) (call_frame_t *frame,
                                   xlator_t *this,
                                   const char *volume, loc_t *loc,
                                   const char *basename, entrylk_cmd cmd,
-                                  entrylk_type type);
+                                  entrylk_type type, dict_t *xdata);
 
 typedef int32_t (*fop_fentrylk_t) (call_frame_t *frame,
                                    xlator_t *this,
                                    const char *volume, fd_t *fd,
                                    const char *basename, entrylk_cmd cmd,
-                                   entrylk_type type);
+                                   entrylk_type type, dict_t *xdata);
 
 typedef int32_t (*fop_readdir_t) (call_frame_t *frame,
                                   xlator_t *this,
                                   fd_t *fd,
                                   size_t size,
-                                  off_t offset);
+                                  off_t offset, dict_t *xdata);
 
 typedef int32_t (*fop_readdirp_t) (call_frame_t *frame,
                                    xlator_t *this,
                                    fd_t *fd,
                                    size_t size,
                                    off_t offset,
-                                   dict_t *dict);
+                                   dict_t *xdata);
 
 typedef int32_t (*fop_xattrop_t) (call_frame_t *frame,
                                   xlator_t *this,
                                   loc_t *loc,
                                   gf_xattrop_flags_t optype,
-                                  dict_t *xattr);
+                                  dict_t *xattr, dict_t *xdata);
 
 typedef int32_t (*fop_fxattrop_t) (call_frame_t *frame,
                                    xlator_t *this,
                                    fd_t *fd,
                                    gf_xattrop_flags_t optype,
-                                   dict_t *xattr);
+                                   dict_t *xattr, dict_t *xdata);
 
 typedef int32_t (*fop_setattr_t) (call_frame_t *frame,
                                   xlator_t *this,
                                   loc_t *loc,
                                   struct iatt *stbuf,
-                                  int32_t valid);
+                                  int32_t valid, dict_t *xdata);
 
 typedef int32_t (*fop_fsetattr_t) (call_frame_t *frame,
                                    xlator_t *this,
                                    fd_t *fd,
                                    struct iatt *stbuf,
-                                   int32_t valid);
+                                   int32_t valid, dict_t *xdata);
 
 
 struct xlator_fops {