[PATCH 1/2] xenFormatNet: correct `type=netfront' to 'type=vif' to match libxl

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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@xxxxxxxx>
---
 src/xenconfig/xen_common.c | 38 ++++++++++++++++++++++++--------------
 src/xenconfig/xen_common.h |  7 ++++---
 src/xenconfig/xen_xl.c     |  4 ++--
 src/xenconfig/xen_xm.c     |  8 ++++----
 4 files changed, 34 insertions(+), 23 deletions(-)

diff --git a/src/xenconfig/xen_common.c b/src/xenconfig/xen_common.c
index e1d9cf6..f54d6b6 100644
--- a/src/xenconfig/xen_common.c
+++ b/src/xenconfig/xen_common.c
@@ -801,9 +801,8 @@ xenParseCharDev(virConfPtr conf, virDomainDefPtr def)
     return -1;
 }
 
-
 static int
-xenParseVif(virConfPtr conf, virDomainDefPtr def)
+xenParseVif(virConfPtr conf, virDomainDefPtr def, const char *vif_typename)
 {
     char *script = NULL;
     virDomainNetDefPtr net = NULL;
@@ -942,7 +941,7 @@ 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, vif_typename) &&
                 VIR_STRDUP(net->model, "netfront") < 0)
                 goto cleanup;
 
@@ -1042,11 +1041,17 @@ xenParseGeneralMeta(virConfPtr conf, virDomainDefPtr def, virCapsPtr caps)
 
 /*
  * A convenience function for parsing all config common to both XM and XL
+ *
+ * vif_typename: type name for a paravirtualized network could
+ * be different for xm and xl. For xm, it uses type=netfront;
+ * for xl, it uses type=vif. So, for xm, should pass "netfront";
+ * for xl, should pass "vif".
  */
 int
 xenParseConfigCommon(virConfPtr conf,
                      virDomainDefPtr def,
-                     virCapsPtr caps)
+                     virCapsPtr caps,
+                     const char *vif_typename)
 {
     if (xenParseGeneralMeta(conf, def, caps) < 0)
         return -1;
@@ -1066,7 +1071,7 @@ xenParseConfigCommon(virConfPtr conf,
     if (xenConfigCopyStringOpt(conf, "device_model", &def->emulator) < 0)
         return -1;
 
-    if (xenParseVif(conf, def) < 0)
+    if (xenParseVif(conf, def, vif_typename) < 0)
         return -1;
 
     if (xenParsePCI(conf, def) < 0)
@@ -1122,12 +1127,12 @@ xenFormatSerial(virConfValuePtr list, virDomainChrDefPtr serial)
     return -1;
 }
 
-
 static int
 xenFormatNet(virConnectPtr conn,
              virConfValuePtr list,
              virDomainNetDefPtr net,
-             int hvm)
+             int hvm,
+             const char *vif_typename)
 {
     virBuffer buf = VIR_BUFFER_INITIALIZER;
     virConfValuePtr val, tmp;
@@ -1199,7 +1204,7 @@ xenFormatNet(virConnectPtr conn,
             virBufferAsprintf(&buf, ",model=%s", net->model);
     } else {
         if (net->model != NULL && STREQ(net->model, "netfront")) {
-            virBufferAddLit(&buf, ",type=netfront");
+            virBufferAsprintf(&buf, ",type=%s", vif_typename);
         } else {
             if (net->model != NULL)
                 virBufferAsprintf(&buf, ",model=%s", net->model);
@@ -1744,12 +1749,11 @@ xenFormatSound(virConfPtr conf, virDomainDefPtr def)
     return 0;
 }
 
-
-
 static int
 xenFormatVif(virConfPtr conf,
              virConnectPtr conn,
-             virDomainDefPtr def)
+             virDomainDefPtr def,
+             const char *vif_typename)
 {
    virConfValuePtr netVal = NULL;
    size_t i;
@@ -1762,7 +1766,7 @@ xenFormatVif(virConfPtr conf,
 
     for (i = 0; i < def->nnets; i++) {
         if (xenFormatNet(conn, netVal, def->nets[i],
-                         hvm) < 0)
+                         hvm, vif_typename) < 0)
            goto cleanup;
     }
 
@@ -1784,11 +1788,17 @@ xenFormatVif(virConfPtr conf,
 
 /*
  * A convenience function for formatting all config common to both XM and XL
+ *
+ * vif_typename: type name for a paravirtualized network could
+ * be different for xm and xl. For xm, it uses type=netfront;
+ * for xl, it uses type=vif. So, for xm, should pass "netfront";
+ * for xl, should pass "vif".
  */
 int
 xenFormatConfigCommon(virConfPtr conf,
                       virDomainDefPtr def,
-                      virConnectPtr conn)
+                      virConnectPtr conn,
+                      const char *vif_typename)
 {
     if (xenFormatGeneralMeta(conf, def) < 0)
         return -1;
@@ -1814,7 +1824,7 @@ xenFormatConfigCommon(virConfPtr conf,
     if (xenFormatVfb(conf, def) < 0)
         return -1;
 
-    if (xenFormatVif(conf, conn, def) < 0)
+    if (xenFormatVif(conf, conn, def, vif_typename) < 0)
         return -1;
 
     if (xenFormatPCI(conf, def) < 0)
diff --git a/src/xenconfig/xen_common.h b/src/xenconfig/xen_common.h
index 9ddf210..c1c5fcc 100644
--- a/src/xenconfig/xen_common.h
+++ b/src/xenconfig/xen_common.h
@@ -54,12 +54,13 @@ int xenConfigCopyStringOpt(virConfPtr conf,
 
 int xenParseConfigCommon(virConfPtr conf,
                          virDomainDefPtr def,
-                         virCapsPtr caps);
+                         virCapsPtr caps,
+                         const char *vif_typename);
 
 int xenFormatConfigCommon(virConfPtr conf,
                           virDomainDefPtr def,
-                          virConnectPtr conn);
-
+                          virConnectPtr conn,
+                          const char *vif_typename);
 
 int xenDomainDefAddImplicitInputDevice(virDomainDefPtr def);
 
diff --git a/src/xenconfig/xen_xl.c b/src/xenconfig/xen_xl.c
index 889dd40..dfd2757 100644
--- a/src/xenconfig/xen_xl.c
+++ b/src/xenconfig/xen_xl.c
@@ -499,7 +499,7 @@ xenParseXL(virConfPtr conf,
     def->virtType = VIR_DOMAIN_VIRT_XEN;
     def->id = -1;
 
-    if (xenParseConfigCommon(conf, def, caps) < 0)
+    if (xenParseConfigCommon(conf, def, caps, "vif") < 0)
         goto cleanup;
 
     if (xenParseXLOS(conf, def, caps) < 0)
@@ -994,7 +994,7 @@ xenFormatXL(virDomainDefPtr def, virConnectPtr conn)
     if (!(conf = virConfNew()))
         goto cleanup;
 
-    if (xenFormatConfigCommon(conf, def, conn) < 0)
+    if (xenFormatConfigCommon(conf, def, conn, "vif") < 0)
         goto cleanup;
 
     if (xenFormatXLOS(conf, def) < 0)
diff --git a/src/xenconfig/xen_xm.c b/src/xenconfig/xen_xm.c
index e09d97e..5378def 100644
--- a/src/xenconfig/xen_xm.c
+++ b/src/xenconfig/xen_xm.c
@@ -443,14 +443,14 @@ xenParseXM(virConfPtr conf,
     def->virtType = VIR_DOMAIN_VIRT_XEN;
     def->id = -1;
 
-    if (xenParseConfigCommon(conf, def, caps) < 0)
+    if (xenParseConfigCommon(conf, def, caps, "netfront") < 0)
         goto cleanup;
 
     if (xenParseXMOS(conf, def) < 0)
-         goto cleanup;
+        goto cleanup;
 
     if (xenParseXMDisk(conf, def) < 0)
-         goto cleanup;
+        goto cleanup;
 
     if (xenParseXMInputDevs(conf, def) < 0)
          goto cleanup;
@@ -586,7 +586,7 @@ xenFormatXM(virConnectPtr conn,
     if (!(conf = virConfNew()))
         goto cleanup;
 
-    if (xenFormatConfigCommon(conf, def, conn) < 0)
+    if (xenFormatConfigCommon(conf, def, conn, "netfront") < 0)
         goto cleanup;
 
     if (xenFormatXMOS(conf, def) < 0)
-- 
2.1.4

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