1.1 --- a/tools/libxl/libxl.c	Tue Jan 25 17:02:47 2011 +0000
     1.2 +++ b/tools/libxl/libxl.c	Tue Jan 25 18:06:53 2011 +0000
     1.3 @@ -646,8 +646,8 @@ int libxl_event_get_disk_eject_info(libx
     1.4  
     1.5      disk->backend_domid = 0;
     1.6      disk->domid = domid;
     1.7 -    disk->physpath = NULL;
     1.8 -    disk->phystype = 0;
     1.9 +    disk->physpath = strdup("");
    1.10 +    disk->phystype = PHYSTYPE_EMPTY;
    1.11      /* this value is returned to the user: do not free right away */
    1.12      disk->virtpath = libxl__xs_read(&gc, XBT_NULL, libxl__sprintf(&gc, "%s/dev", backend));
    1.13      disk->unpluggable = 1;
    1.14 @@ -882,6 +882,8 @@ int libxl_device_disk_add(libxl_ctx *ctx
    1.15              device.backend_kind = DEVICE_VBD;
    1.16              break;
    1.17          }
    1.18 +        case PHYSTYPE_EMPTY:
    1.19 +            break;
    1.20          case PHYSTYPE_FILE:
    1.21              /* let's pretend is tap:aio for the moment */
    1.22              disk->phystype = PHYSTYPE_AIO;
    1.23 @@ -1606,7 +1608,7 @@ static unsigned int libxl_append_disk_li
    1.24              pdisk->backend_domid = 0;
    1.25              pdisk->domid = domid;
    1.26              physpath_tmp = xs_read(ctx->xsh, XBT_NULL, libxl__sprintf(&gc, "%s/%s/params", be_path, *dir), &len);
    1.27 -            if (strchr(physpath_tmp, ':')) {
    1.28 +            if (physpath_tmp && strchr(physpath_tmp, ':')) {
    1.29                  pdisk->physpath = strdup(strchr(physpath_tmp, ':') + 1);
    1.30                  free(physpath_tmp);
    1.31              } else {
    1.32 @@ -1684,7 +1686,7 @@ int libxl_cdrom_insert(libxl_ctx *ctx, u
    1.33  
    1.34      if (!disk->physpath) {
    1.35          disk->physpath = strdup("");
    1.36 -        disk->phystype = PHYSTYPE_PHY;
    1.37 +        disk->phystype = PHYSTYPE_EMPTY;
    1.38      }
    1.39      disks = libxl_device_disk_list(ctx, domid, &num);
    1.40      for (i = 0; i < num; i++) {

     2.1 --- a/tools/libxl/libxl.h	Tue Jan 25 17:02:47 2011 +0000
     2.2 +++ b/tools/libxl/libxl.h	Tue Jan 25 18:06:53 2011 +0000
     2.3 @@ -178,6 +178,7 @@ typedef enum {
     2.4      PHYSTYPE_AIO,
     2.5      PHYSTYPE_FILE,
     2.6      PHYSTYPE_PHY,
     2.7 +    PHYSTYPE_EMPTY,
     2.8  } libxl_disk_phystype;
     2.9  
    2.10  typedef enum {

     3.1 --- a/tools/libxl/libxl_device.c	Tue Jan 25 17:02:47 2011 +0000
     3.2 +++ b/tools/libxl/libxl_device.c	Tue Jan 25 18:06:53 2011 +0000
     3.3 @@ -130,6 +130,7 @@ char *libxl__device_disk_string_of_physt
     3.4          case PHYSTYPE_AIO: return "aio";
     3.5          case PHYSTYPE_FILE: return "file";
     3.6          case PHYSTYPE_PHY: return "phy";
     3.7 +        case PHYSTYPE_EMPTY: return "file";
     3.8          default: return NULL;
     3.9      }
    3.10  }
    3.11 @@ -143,6 +144,7 @@ char *libxl__device_disk_backend_type_of
    3.12          case PHYSTYPE_AIO: return "tap";
    3.13          /* let's pretend file is tap:aio */
    3.14          case PHYSTYPE_FILE: return "tap";
    3.15 +        case PHYSTYPE_EMPTY: return "tap";
    3.16          case PHYSTYPE_PHY: return "phy";
    3.17          default: return NULL;
    3.18      }

     4.1 --- a/tools/libxl/xl_cmdimpl.c	Tue Jan 25 17:02:47 2011 +0000
     4.2 +++ b/tools/libxl/xl_cmdimpl.c	Tue Jan 25 18:06:53 2011 +0000
     4.3 @@ -457,6 +457,11 @@ static int parse_disk_config(libxl_devic
     4.4                      return 0;
     4.5                  }
     4.6                  tok = p + 1;
     4.7 +            } else if (*p == ',') {
     4.8 +                state = DSTATE_VIRTPATH;
     4.9 +                disk->phystype = PHYSTYPE_EMPTY;
    4.10 +                disk->physpath = strdup("");
    4.11 +                tok = p + 1;
    4.12              }
    4.13              break;
    4.14          case DSTATE_TAP:
    4.15 @@ -1834,8 +1839,8 @@ static void cd_insert(const char *dom, c
    4.16              libxl_string_to_phystype(&ctx, phys, &disk.phystype);
    4.17          }
    4.18      } else {
    4.19 -            disk.physpath = NULL;
    4.20 -            disk.phystype = 0;
    4.21 +            disk.physpath = strdup("");
    4.22 +            disk.phystype = PHYSTYPE_EMPTY;
    4.23      }
    4.24      disk.virtpath = (char*)virtdev;
    4.25      disk.unpluggable = 1;