[libvirt] [PATCH 5/7] Introduce generic virDomainDeviceInfo iterator function

["Daniel P. Berrange" <berrange@xxxxxxxxxx>]

The virDomainDeviceInfoIterate() function will provide a
convenient way to iterate over all devices in a domain.

* src/conf/domain_conf.c, src/conf/domain_conf.h,
  src/libvirt_private.syms: Add virDomainDeviceInfoIterate()
  function.
---
 src/conf/domain_conf.c   |   67 +++++++++++++++++++++++++++++++---------------
 src/conf/domain_conf.h   |    8 +++++
 src/libvirt_private.syms |    1 +
 3 files changed, 54 insertions(+), 22 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index e548d1d..691fc84 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -824,59 +824,82 @@ void virDomainDeviceInfoClear(virDomainDeviceInfoPtr info)
 }
 
 
-static void virDomainDeviceInfoClearField(virDomainDeviceInfoPtr info, int alias, int pciaddr)
+static int virDomainDeviceInfoClearAlias(virDomainDefPtr def ATTRIBUTE_UNUSED,
+                                         virDomainDeviceInfoPtr info,
+                                         void *opaque ATTRIBUTE_UNUSED)
 {
-    if (alias)
-        VIR_FREE(info->alias);
-    if (pciaddr &&
-        info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) {
+    VIR_FREE(info->alias);
+    return 0;
+}
+
+static int virDomainDeviceInfoClearPCIAddress(virDomainDefPtr def ATTRIBUTE_UNUSED,
+                                              virDomainDeviceInfoPtr info,
+                                              void *opaque ATTRIBUTE_UNUSED)
+{
+    if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) {
         memset(&info->addr, 0, sizeof(info->addr));
         info->type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE;
     }
+    return 0;
 }
 
-
-static void virDomainDefClearDeviceInfo(virDomainDefPtr def, int alias, int pciaddr)
+int virDomainDeviceInfoIterate(virDomainDefPtr def,
+                               virDomainDeviceInfoCallback cb,
+                               void *opaque)
 {
     int i;
 
     for (i = 0; i < def->ndisks ; i++)
-        virDomainDeviceInfoClearField(&def->disks[i]->info, alias, pciaddr);
+        if (cb(def, &def->disks[i]->info, opaque) < 0)
+            return -1;
     for (i = 0; i < def->nnets ; i++)
-        virDomainDeviceInfoClearField(&def->nets[i]->info, alias, pciaddr);
+        if (cb(def, &def->nets[i]->info, opaque) < 0)
+            return -1;
     for (i = 0; i < def->nsounds ; i++)
-        virDomainDeviceInfoClearField(&def->sounds[i]->info, alias, pciaddr);
+        if (cb(def, &def->sounds[i]->info, opaque) < 0)
+            return -1;
     for (i = 0; i < def->nhostdevs ; i++)
-        virDomainDeviceInfoClearField(&def->hostdevs[i]->info, alias, pciaddr);
+        if (cb(def, &def->hostdevs[i]->info, opaque) < 0)
+            return -1;
     for (i = 0; i < def->nvideos ; i++)
-        virDomainDeviceInfoClearField(&def->videos[i]->info, alias, pciaddr);
+        if (cb(def, &def->videos[i]->info, opaque) < 0)
+            return -1;
     for (i = 0; i < def->ncontrollers ; i++)
-        virDomainDeviceInfoClearField(&def->controllers[i]->info, alias, pciaddr);
+        if (cb(def, &def->controllers[i]->info, opaque) < 0)
+            return -1;
     for (i = 0; i < def->nserials ; i++)
-        virDomainDeviceInfoClearField(&def->serials[i]->info, alias, pciaddr);
+        if (cb(def, &def->serials[i]->info, opaque) < 0)
+            return -1;
     for (i = 0; i < def->nparallels ; i++)
-        virDomainDeviceInfoClearField(&def->parallels[i]->info, alias, pciaddr);
+        if (cb(def, &def->parallels[i]->info, opaque) < 0)
+            return -1;
     for (i = 0; i < def->nchannels ; i++)
-        virDomainDeviceInfoClearField(&def->channels[i]->info, alias, pciaddr);
+        if (cb(def, &def->channels[i]->info, opaque) < 0)
+            return -1;
     for (i = 0; i < def->ninputs ; i++)
-        virDomainDeviceInfoClearField(&def->inputs[i]->info, alias, pciaddr);
+        if (cb(def, &def->inputs[i]->info, opaque) < 0)
+            return -1;
     for (i = 0; i < def->nfss ; i++)
-        virDomainDeviceInfoClearField(&def->fss[i]->info, alias, pciaddr);
+        if (cb(def, &def->fss[i]->info, opaque) < 0)
+            return -1;
     if (def->watchdog)
-        virDomainDeviceInfoClearField(&def->watchdog->info, alias, pciaddr);
+        if (cb(def, &def->watchdog->info, opaque) < 0)
+            return -1;
     if (def->console)
-        virDomainDeviceInfoClearField(&def->console->info, alias, pciaddr);
+        if (cb(def, &def->console->info, opaque) < 0)
+            return -1;
+    return 0;
 }
 
 
 void virDomainDefClearPCIAddresses(virDomainDefPtr def)
 {
-    virDomainDefClearDeviceInfo(def, 0, 1);
+    virDomainDeviceInfoIterate(def, virDomainDeviceInfoClearPCIAddress, NULL);
 }
 
 void virDomainDefClearDeviceAliases(virDomainDefPtr def)
 {
-    virDomainDefClearDeviceInfo(def, 1, 0);
+    virDomainDeviceInfoIterate(def, virDomainDeviceInfoClearAlias, NULL);
 }
 
 
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 7be090d..be0dc92 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -742,6 +742,14 @@ void virDomainDeviceInfoClear(virDomainDeviceInfoPtr info);
 void virDomainDefClearPCIAddresses(virDomainDefPtr def);
 void virDomainDefClearDeviceAliases(virDomainDefPtr def);
 
+typedef int (*virDomainDeviceInfoCallback)(virDomainDefPtr def,
+                                           virDomainDeviceInfoPtr dev,
+                                           void *opaque);
+
+int virDomainDeviceInfoIterate(virDomainDefPtr def,
+                               virDomainDeviceInfoCallback cb,
+                               void *opaque);
+
 void virDomainDefFree(virDomainDefPtr vm);
 void virDomainObjRef(virDomainObjPtr vm);
 /* Returns 1 if the object was freed, 0 if more refs exist */
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index e42c090..ce1674b 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -189,6 +189,7 @@ virDomainDeviceAddressTypeToString;
 virDomainDefAddDiskControllers;
 virDomainDefClearPCIAddresses;
 virDomainDefClearDeviceAliases;
+virDomainDeviceInfoIterate;
 
 
 # domain_event.h
-- 
1.6.5.2

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