*** /home/vduvvuru/xen-3.3.0/xen/common/grant_table.c	2008-12-19 19:41:28.000000000 +0530
--- xen/common/grant_table.c	2009-02-02 21:38:23.000000000 +0530
***************
*** 1284,1289 ****
--- 1284,1290 ----
      act = &active_entry(rd->grant_table, gref);
      sha = &shared_entry(rd->grant_table, gref);
      
+     
      /* If already pinned, check the active domid and avoid refcnt overflow. */
      if ( act->pin &&
           ((act->domid != current->domain->domain_id) ||
***************
*** 1300,1313 ****
          for ( ; ; )
          {
              /* If not already pinned, check the grant domid and type. */
!             if ( !act->pin &&
                   (((scombo.shorts.flags & GTF_type_mask) !=
                     GTF_permit_access) ||
                    (scombo.shorts.domid != current->domain->domain_id)) )
                   PIN_FAIL(unlock_out, GNTST_general_error,
                            "Bad flags (%x) or dom (%d). (expected dom %d)\n",
                            scombo.shorts.flags, scombo.shorts.domid,
                            current->domain->domain_id);
  
              new_scombo = scombo;
              new_scombo.shorts.flags |= GTF_reading;
--- 1301,1317 ----
          for ( ; ; )
          {
              /* If not already pinned, check the grant domid and type. */
! /*            if ( !act->pin &&
                   (((scombo.shorts.flags & GTF_type_mask) !=
                     GTF_permit_access) ||
                    (scombo.shorts.domid != current->domain->domain_id)) )
+ {
+     gdprintk(XENLOG_INFO, "Grant entry Info \n Domid=%d, Flags=%d, Frame=%d\n",sha->domid,sha->flags,sha->frame);
                   PIN_FAIL(unlock_out, GNTST_general_error,
                            "Bad flags (%x) or dom (%d). (expected dom %d)\n",
                            scombo.shorts.flags, scombo.shorts.domid,
                            current->domain->domain_id);
+ }*/
  
              new_scombo = scombo;
              new_scombo.shorts.flags |= GTF_reading;
***************
*** 1366,1375 ****
      src_is_gref = op->flags & GNTCOPY_source_gref;
      dest_is_gref = op->flags & GNTCOPY_dest_gref;
  
!     if ( (op->source.domid != DOMID_SELF && !src_is_gref ) ||
           (op->dest.domid   != DOMID_SELF && !dest_is_gref)   )
          PIN_FAIL(error_out, GNTST_permission_denied,
!                  "only allow copy-by-mfn for DOMID_SELF.\n");
  
      if ( op->source.domid == DOMID_SELF )
          sd = rcu_lock_current_domain();
--- 1370,1379 ----
      src_is_gref = op->flags & GNTCOPY_source_gref;
      dest_is_gref = op->flags & GNTCOPY_dest_gref;
  
! /*     if ( (op->source.domid != DOMID_SELF && !src_is_gref ) ||
           (op->dest.domid   != DOMID_SELF && !dest_is_gref)   )
          PIN_FAIL(error_out, GNTST_permission_denied,
!                  "only allow copy-by-mfn for DOMID_SELF.\n");*/
  
      if ( op->source.domid == DOMID_SELF )
          sd = rcu_lock_current_domain();
***************
*** 1392,1401 ****
--- 1396,1408 ----
  
      if ( src_is_gref )
      {
+ 	gdprintk(XENLOG_INFO, "Entering Source Stuff \n");
+ 	gdprintk(XENLOG_INFO, "Source gref is %d \n",op->source.u.ref);
          rc = __acquire_grant_for_copy(sd, op->source.u.ref, 1, &s_frame);
          if ( rc != GNTST_okay )
              goto error_out;
          have_s_grant = 1;
+ 	gdprintk(XENLOG_INFO, "Exiting Source Stuff \n");
      }
      else
      {
***************
*** 1415,1424 ****
--- 1422,1434 ----
  
      if ( dest_is_gref )
      {
+ 	gdprintk(XENLOG_INFO, "Entering dest Stuff \n");
+ 	gdprintk(XENLOG_INFO, "dest gref is %d \n",op->dest.u.ref);
          rc = __acquire_grant_for_copy(dd, op->dest.u.ref, 0, &d_frame);
          if ( rc != GNTST_okay )
              goto error_out;
          have_d_grant = 1;
+ 	gdprintk(XENLOG_INFO, "Exiting dest Stuff \n");
      }
      else
      {