libxl: disks: expose new "script" parameter for external block scripts

This is not currently implemented.  Applications setting it to
anything but NULL will cause an error.  Code to set it from xl
configuration files will appear later in this series.

Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index f45dd39f066fb4736b6e7afbc7457e623a4c7337..d7672e35dddc1e3ad0490f3859d892991a2cb197 100644 (file)
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -970,6 +970,13 @@ int libxl_device_disk_add(libxl_ctx *ctx, uint32_t domid, libxl_device_disk *dis
         goto out_free;
     }
 
+    if (disk->script) {
+        LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "External block scripts"
+                   " not yet supported, sorry");
+        rc = ERROR_INVAL;
+        goto out_free;
+    }
+
     devid = libxl__device_disk_dev_number(disk->vdev, NULL, NULL);
     if (devid==-1) {
         LIBXL__LOG(ctx, LIBXL__LOG_ERROR, "Invalid or unsupported"

diff --git a/tools/libxl/libxl.idl b/tools/libxl/libxl.idl
index 71ad05169911ad7ec77a0bf702cec89bafcfad3f..b2ab52cfb1656da1a5283a0ac2efe42a55beb5d2 100644 (file)
--- a/tools/libxl/libxl.idl
+++ b/tools/libxl/libxl.idl
@@ -279,6 +279,7 @@ libxl_device_disk = Struct("device_disk", [
     ("vdev", string),
     ("backend", libxl_disk_backend),
     ("format", libxl_disk_format),
+    ("script", string),
     ("unpluggable", integer),
     ("readwrite", integer),
     ("is_cdrom", integer),