[libvirt] [PATCH] libxl config file convertion: correct `type=netfront' to 'type=vif'

[Chunyan Liu]

According to current xl.cfg docs and xl codes, it uses type=vif
instead of type=netfront.

Currently after domxml-to-native, libvirt xml model=netfront will be
converted to xl type=netfront. This has no problem before, xen codes
for a long time just check type=ioemu, if not, set type to _VIF.

Since libxl uses parse_nic_config to avoid duplicate codes, it
compares 'type=vif' and 'type=ioemu' for valid parameters, others
are considered as invalid, thus we have problem with type=netfront
in xl config file.
 #xl create sles12gm-hvm.orig
 Parsing config from sles12gm-hvm.orig
 Invalid parameter `type'.

Correct the convertion in libvirt, so that it matchs libxl codes
and also xl.cfg.

Signed-off-by: Chunyan Liu <cyliu at suse.com>
---
Since type=netfront config has been used for a very long time, at
lease for xm/xend, it has no problem. I'm not sure if we need to
split into xenParseXLVif vs xenParseXMVif, and xenFormatXLVif vs
xenFormatXMVif for this change?

 src/xenconfig/xen_common.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/xenconfig/xen_common.c b/src/xenconfig/xen_common.c
index 4dcd484..ae81635 100644
--- a/src/xenconfig/xen_common.c
+++ b/src/xenconfig/xen_common.c
@@ -944,7 +944,8 @@ xenParseVif(virConfPtr conf, virDomainDefPtr def)
                 VIR_STRDUP(net->model, model) < 0)
                 goto cleanup;
 
-            if (!model[0] && type[0] && STREQ(type, "netfront") &&
+            if (!model[0] && type[0] &&
+                (STREQ(type, "netfront") || STREQ(type, "vif")) &&
                 VIR_STRDUP(net->model, "netfront") < 0)
                 goto cleanup;
 
@@ -1201,7 +1202,7 @@ xenFormatNet(virConnectPtr conn,
             virBufferAsprintf(&buf, ",model=%s", net->model);
     } else {
         if (net->model != NULL && STREQ(net->model, "netfront")) {
-            virBufferAddLit(&buf, ",type=netfront");
+            virBufferAddLit(&buf, ",type=vif");
         } else {
             if (net->model != NULL)
                 virBufferAsprintf(&buf, ",model=%s", net->model);
-- 
2.1.4