vz: set boot from disk for CT only when there is no root filesystem

Before, boot devices information for CTs was always empty and we
didn't indicate that containers can boot from disk.
Signed-off-by: NMaxim Nestratov <mnestratov@virtuozzo.com>

src/vz/vz_sdk.c

@@ -1695,8 +1695,23 @@ prlsdkBootOrderCheck(PRL_HANDLE sdkdom, PRL_DEVICE_TYPE sdkType, int sdkIndex,
     return ret;
 }
 
+static void
+prlsdkConvertBootOrderCt(virDomainDefPtr def)
+{
+    size_t i;
+    for (i = 0; i < def->nfss; i++) {
+
+        if (STREQ(def->fss[i]->dst, "/")) {
+            def->os.nBootDevs = 0;
+            return;
+        }
+    }
+    def->os.nBootDevs = 1;
+    def->os.bootDevs[0] = VIR_DOMAIN_BOOT_DISK;
+}
+
 static int
-prlsdkConvertBootOrder(PRL_HANDLE sdkdom, virDomainDefPtr def)
+prlsdkConvertBootOrderVm(PRL_HANDLE sdkdom, virDomainDefPtr def)
 {
     int ret = -1;
     PRL_RESULT pret;
@@ -1855,8 +1870,12 @@ prlsdkLoadDomain(vzDriverPtr driver,
         goto error;
 
     /* depends on prlsdkAddDomainHardware */
-    if (prlsdkConvertBootOrder(sdkdom, def) < 0)
+    if (IS_CT(def)) {
+        prlsdkConvertBootOrderCt(def);
+    } else {
+        if (prlsdkConvertBootOrderVm(sdkdom, def) < 0)
             goto error;
+    }
 
     pret = PrlVmCfg_GetEnvId(sdkdom, &envId);
     prlsdkCheckRetGoto(pret, error);