[Xen-devel] [PATCH v4 3/6] libxl: initialise the build info before calling prepare_config

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

libxl__arch_domain_prepare_config has access to the libxl_domain_build_info
struct, so make sure it's properly initialised. Note that prepare_config is
called from within libxl__domain_make.

This is not a bug at the moment, because prepare_config doesn't access
libxl_domain_build_info yet, but this is likely going to change.

Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
---
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
---
Changes since v3:
 - Reword commit message to make it clear that prepare_config is called from
   domain_make, and that the fact that build_info is not initialised is not
   a bug ATM because prepare_config doesn't make use of it.
---
 tools/libxl/libxl_create.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index b669359..c7700a7 100644
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -892,6 +892,12 @@ static void initiate_domain_create(libxl__egc *egc,
         goto error_out;
     }
 
+    ret = libxl__domain_build_info_setdefault(gc, &d_config->b_info);
+    if (ret) {
+        LOG(ERROR, "Unable to set domain build info defaults");
+        goto error_out;
+    }
+
     ret = libxl__domain_make(gc, d_config, &domid, &state->config);
     if (ret) {
         LOG(ERROR, "cannot make domain: %d", ret);
@@ -903,12 +909,6 @@ static void initiate_domain_create(libxl__egc *egc,
     dcs->guest_domid = domid;
     dcs->dmss.dm.guest_domid = 0; /* means we haven't spawned */
 
-    ret = libxl__domain_build_info_setdefault(gc, &d_config->b_info);
-    if (ret) {
-        LOG(ERROR, "Unable to set domain build info defaults");
-        goto error_out;
-    }
-
     if (d_config->c_info.type == LIBXL_DOMAIN_TYPE_HVM &&
         (libxl_defbool_val(d_config->b_info.u.hvm.nested_hvm) &&
          libxl_defbool_val(d_config->b_info.u.hvm.altp2m))) {
-- 
1.9.5 (Apple Git-50.3)


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