[PATCH] libs/light: pass some infos to qemu

[Manuel Bouyer <bouyer@xxxxxxxxxxxxxxx>]

From: Manuel Bouyer <bouyer@xxxxxxxxxx>

Pass bridge name to qemu as command line option
When starting qemu, set an environnement variable XEN_DOMAIN_ID,
to be used by qemu helper scripts

Signed-off-by: Manuel Bouyer <bouyer@xxxxxxxxxx>
---
 tools/libs/light/libxl_dm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/libs/light/libxl_dm.c b/tools/libs/light/libxl_dm.c
index 3da83259c0..8866c3f5ad 100644
--- a/tools/libs/light/libxl_dm.c
+++ b/tools/libs/light/libxl_dm.c
@@ -761,6 +761,8 @@ static int libxl__build_device_model_args_old(libxl__gc *gc,
         int nr_set_cpus = 0;
         char *s;
 
+        flexarray_append_pair(dm_envs, "XEN_DOMAIN_ID", GCSPRINTF("%d", 
domid));
+
         if (b_info->kernel) {
             LOGD(ERROR, domid, "HVM direct kernel boot is not supported by "
                  "qemu-xen-traditional");
@@ -1547,8 +1549,10 @@ static int libxl__build_device_model_args_new(libxl__gc 
*gc,
                 flexarray_append(dm_args, "-netdev");
                 flexarray_append(dm_args,
                                  GCSPRINTF("type=tap,id=net%d,ifname=%s,"
+                                          "br=%s,"
                                            "script=%s,downscript=%s",
                                            nics[i].devid, ifname,
+                                          nics[i].bridge,
                                            libxl_tapif_script(gc),
                                            libxl_tapif_script(gc)));
 
@@ -1825,6 +1829,8 @@ static int libxl__build_device_model_args_new(libxl__gc 
*gc,
     flexarray_append(dm_args, GCSPRINTF("%"PRId64, ram_size));
 
     if (b_info->type == LIBXL_DOMAIN_TYPE_HVM) {
+        flexarray_append_pair(dm_envs, "XEN_DOMAIN_ID", GCSPRINTF("%d", 
guest_domid));
+
         if (b_info->u.hvm.hdtype == LIBXL_HDTYPE_AHCI)
             flexarray_append_pair(dm_args, "-device", "ahci,id=ahci0");
         for (i = 0; i < num_disks; i++) {
-- 
2.29.2