[PATCH RFC] auto-create pci-bridge controller info

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if some devices specify a pci bus number that
haven't been defined by a pci-bridge controller
then fill the required correct controller info
silently.
it based on previous add pci-bridge support patches,
https://www.redhat.com/archives/libvir-list/2013-January/msg00577.html

Signed-off-by: liguang <lig.fnst@xxxxxxxxxxxxxx>
---
 src/conf/domain_conf.c |   57 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 57 insertions(+), 0 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 8ebe77d..988e4f2 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -11756,6 +11756,60 @@ virDomainDefMaybeAddSmartcardController(virDomainDefPtr def)
 }
 
 
+static int
+virDomainDefMaybeAddPcibridgeController(virDomainDefPtr def)
+{
+    int i, idx = 0;
+
+    for (i = 0; i < def->nnets; i++) {
+        if (def->nets[i]->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI)
+            continue;
+        idx = def->nets[i]->info.addr.pci.bus;
+        if (virDomainDefMaybeAddController(def,
+                                           VIR_DOMAIN_CONTROLLER_TYPE_PCIBRIDGE,
+                                           idx) < 0)
+            return -1;
+    }
+
+    for (i = 0; i < def->nsounds; i++) {
+        if (def->sounds[i]->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI)
+            continue;
+        idx = def->sounds[i]->info.addr.pci.bus;
+        if (virDomainDefMaybeAddController(def,
+                                           VIR_DOMAIN_CONTROLLER_TYPE_PCIBRIDGE,
+                                           idx) < 0)
+            return -1;
+    }
+
+    for (i = 0; i < def->nvideos; i++) {
+        if (def->videos[i]->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI)
+            continue;
+        idx = def->videos[i]->info.addr.pci.bus;
+        if (virDomainDefMaybeAddController(def,
+                                           VIR_DOMAIN_CONTROLLER_TYPE_PCIBRIDGE,
+                                           idx) < 0)
+            return -1;
+    }
+
+    if (def->watchdog->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI)
+        idx = def->watchdog->info.addr.pci.bus;
+
+    if (virDomainDefMaybeAddController(def,
+                                       VIR_DOMAIN_CONTROLLER_TYPE_PCIBRIDGE,
+                                       idx) < 0)
+        return -1;
+
+    if (def->memballoon->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI)
+        idx = def->memballoon->info.addr.pci.bus;
+
+    if (virDomainDefMaybeAddController(def,
+                                       VIR_DOMAIN_CONTROLLER_TYPE_PCIBRIDGE,
+                                       idx) < 0)
+        return -1;
+
+    return 0;
+}
+
 /*
  * Based on the declared <address/> info for any devices,
  * add necessary drive controllers which are not already present
@@ -11790,6 +11844,9 @@ int virDomainDefAddImplicitControllers(virDomainDefPtr def)
     if (virDomainDefMaybeAddSmartcardController(def) < 0)
         return -1;
 
+    if (virDomainDefMaybeAddPcibridgeController(def) < 0)
+        return -1;
+
     return 0;
 }
 
-- 
1.7.2.5

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