qemu: Converting DHCP and ARP functions to domain conf

QEMU driver has two functions: qemuGetDHCPInterfaces() and
qemuARPGetInterfaces() that are being used inside only one single
function. They can be turned into generic functions that other drivers
can use. This commit move both from QEMU driver tree to domain conf
tree.

Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

src/conf/domain_conf.c

@@ -57,6 +57,7 @@
 #include "virnetdev.h"
 #include "virnetdevtap.h"
 #include "virnetdevmacvlan.h"
+#include "virarptable.h"
 #include "virhostdev.h"
 #include "virmdev.h"
 #include "virdomainsnapshotobjlist.h"
@@ -17267,6 +17268,139 @@ virDomainNetUpdate(virDomainDefPtr def,
 }
 
 
+int
+virDomainNetDHCPInterfaces(virDomainDefPtr def,
+                           virDomainInterfacePtr **ifaces)
+{
+    g_autoptr(virConnect) conn = NULL;
+    virDomainInterfacePtr *ifaces_ret = NULL;
+    size_t ifaces_count = 0;
+    size_t i;
+
+    if (!(conn = virGetConnectNetwork()))
+        return -1;
+
+    for (i = 0; i < def->nnets; i++) {
+        g_autoptr(virNetwork) network = NULL;
+        char macaddr[VIR_MAC_STRING_BUFLEN];
+        virNetworkDHCPLeasePtr *leases = NULL;
+        int n_leases = 0;
+        virDomainInterfacePtr iface = NULL;
+        size_t j;
+
+        if (def->nets[i]->type != VIR_DOMAIN_NET_TYPE_NETWORK)
+            continue;
+
+        virMacAddrFormat(&(def->nets[i]->mac), macaddr);
+
+        network = virNetworkLookupByName(conn,
+                                         def->nets[i]->data.network.name);
+        if (!network)
+            goto error;
+
+        if ((n_leases = virNetworkGetDHCPLeases(network, macaddr,
+                                                &leases, 0)) < 0)
+            goto error;
+
+        if (n_leases) {
+            ifaces_ret = g_renew(typeof(*ifaces_ret), ifaces_ret, ifaces_count + 1);
+            ifaces_ret[ifaces_count] = g_new0(typeof(**ifaces_ret), 1);
+            iface = ifaces_ret[ifaces_count];
+            ifaces_count++;
+
+            /* Assuming each lease corresponds to a separate IP */
+            iface->naddrs = n_leases;
+            iface->addrs = g_new0(typeof(*iface->addrs), iface->naddrs);
+            iface->name = g_strdup(def->nets[i]->ifname);
+            iface->hwaddr = g_strdup(macaddr);
+        }
+
+        for (j = 0; j < n_leases; j++) {
+            virNetworkDHCPLeasePtr lease = leases[j];
+            virDomainIPAddressPtr ip_addr = &iface->addrs[j];
+
+            ip_addr->addr = g_strdup(lease->ipaddr);
+            ip_addr->type = lease->type;
+            ip_addr->prefix = lease->prefix;
+
+            virNetworkDHCPLeaseFree(lease);
+        }
+
+        VIR_FREE(leases);
+    }
+
+    *ifaces = g_steal_pointer(&ifaces_ret);
+    return ifaces_count;
+
+ error:
+    if (ifaces_ret) {
+        for (i = 0; i < ifaces_count; i++)
+            virDomainInterfaceFree(ifaces_ret[i]);
+    }
+    VIR_FREE(ifaces_ret);
+
+    return -1;
+}
+
+
+int
+virDomainNetARPInterfaces(virDomainDefPtr def,
+                          virDomainInterfacePtr **ifaces)
+{
+    size_t i, j;
+    size_t ifaces_count = 0;
+    int ret = -1;
+    char macaddr[VIR_MAC_STRING_BUFLEN];
+    virDomainInterfacePtr *ifaces_ret = NULL;
+    virDomainInterfacePtr iface = NULL;
+    virArpTablePtr table;
+
+    table = virArpTableGet();
+    if (!table)
+        goto cleanup;
+
+    for (i = 0; i < def->nnets; i++) {
+        virMacAddrFormat(&(def->nets[i]->mac), macaddr);
+        for (j = 0; j < table->n; j++) {
+            virArpTableEntry entry = table->t[j];
+
+            if (STREQ(entry.mac, macaddr)) {
+                if (VIR_ALLOC(iface) < 0)
+                    goto cleanup;
+
+                iface->name = g_strdup(def->nets[i]->ifname);
+
+                iface->hwaddr = g_strdup(macaddr);
+
+                if (VIR_ALLOC(iface->addrs) < 0)
+                    goto cleanup;
+                iface->naddrs = 1;
+
+                iface->addrs->addr = g_strdup(entry.ipaddr);
+
+                if (VIR_APPEND_ELEMENT(ifaces_ret, ifaces_count, iface) < 0)
+                    goto cleanup;
+            }
+        }
+    }
+
+    *ifaces = g_steal_pointer(&ifaces_ret);
+    ret = ifaces_count;
+
+ cleanup:
+    virArpTableFree(table);
+    virDomainInterfaceFree(iface);
+
+    if (ifaces_ret) {
+        for (i = 0; i < ifaces_count; i++)
+            virDomainInterfaceFree(ifaces_ret[i]);
+    }
+    VIR_FREE(ifaces_ret);
+
+    return ret;
+}
+
+
 int virDomainControllerInsert(virDomainDefPtr def,
                               virDomainControllerDefPtr controller)
 {

src/conf/domain_conf.h

@@ -3186,6 +3186,8 @@ virDomainNetDefPtr virDomainNetFindByName(virDomainDefPtr def, const char *ifnam
 bool virDomainHasNet(virDomainDefPtr def, virDomainNetDefPtr net);
 int virDomainNetInsert(virDomainDefPtr def, virDomainNetDefPtr net);
 int virDomainNetUpdate(virDomainDefPtr def, size_t netidx, virDomainNetDefPtr newnet);
+int virDomainNetDHCPInterfaces(virDomainDefPtr def, virDomainInterfacePtr **ifaces);
+int virDomainNetARPInterfaces(virDomainDefPtr def, virDomainInterfacePtr **ifaces);
 virDomainNetDefPtr virDomainNetRemove(virDomainDefPtr def, size_t i);
 void virDomainNetRemoveHostdev(virDomainDefPtr def, virDomainNetDefPtr net);
 

src/libvirt_private.syms

@@ -487,6 +487,7 @@ virDomainMemorySourceTypeFromString;
 virDomainMemorySourceTypeToString;
 virDomainNetAllocateActualDevice;
 virDomainNetAppendIPAddress;
+virDomainNetARPInterfaces;
 virDomainNetBandwidthUpdate;
 virDomainNetDefActualFromNetworkPort;
 virDomainNetDefActualToNetworkPort;
@@ -495,6 +496,7 @@ virDomainNetDefFormat;
 virDomainNetDefFree;
 virDomainNetDefNew;
 virDomainNetDefToNetworkPort;
+virDomainNetDHCPInterfaces;
 virDomainNetFind;
 virDomainNetFindByName;
 virDomainNetFindIdx;

src/qemu/qemu_driver.c

@@ -22040,139 +22040,6 @@ qemuDomainGetFSInfo(virDomainPtr dom,
 }
 
 
-static int
-qemuGetDHCPInterfaces(virDomainObjPtr vm,
-                      virDomainInterfacePtr **ifaces)
-{
-    g_autoptr(virConnect) conn = NULL;
-    virDomainInterfacePtr *ifaces_ret = NULL;
-    size_t ifaces_count = 0;
-    size_t i;
-
-    if (!(conn = virGetConnectNetwork()))
-        return -1;
-
-    for (i = 0; i < vm->def->nnets; i++) {
-        g_autoptr(virNetwork) network = NULL;
-        char macaddr[VIR_MAC_STRING_BUFLEN];
-        virNetworkDHCPLeasePtr *leases = NULL;
-        int n_leases = 0;
-        virDomainInterfacePtr iface = NULL;
-        size_t j;
-
-        if (vm->def->nets[i]->type != VIR_DOMAIN_NET_TYPE_NETWORK)
-            continue;
-
-        virMacAddrFormat(&(vm->def->nets[i]->mac), macaddr);
-
-        network = virNetworkLookupByName(conn,
-                                         vm->def->nets[i]->data.network.name);
-        if (!network)
-            goto error;
-
-        if ((n_leases = virNetworkGetDHCPLeases(network, macaddr,
-                                                &leases, 0)) < 0)
-            goto error;
-
-        if (n_leases) {
-            ifaces_ret = g_renew(typeof(*ifaces_ret), ifaces_ret, ifaces_count + 1);
-            ifaces_ret[ifaces_count] = g_new0(typeof(**ifaces_ret), 1);
-            iface = ifaces_ret[ifaces_count];
-            ifaces_count++;
-
-            /* Assuming each lease corresponds to a separate IP */
-            iface->naddrs = n_leases;
-            iface->addrs = g_new0(typeof(*iface->addrs), iface->naddrs);
-            iface->name = g_strdup(vm->def->nets[i]->ifname);
-            iface->hwaddr = g_strdup(macaddr);
-        }
-
-        for (j = 0; j < n_leases; j++) {
-            virNetworkDHCPLeasePtr lease = leases[j];
-            virDomainIPAddressPtr ip_addr = &iface->addrs[j];
-
-            ip_addr->addr = g_strdup(lease->ipaddr);
-            ip_addr->type = lease->type;
-            ip_addr->prefix = lease->prefix;
-
-            virNetworkDHCPLeaseFree(lease);
-        }
-
-        VIR_FREE(leases);
-    }
-
-    *ifaces = g_steal_pointer(&ifaces_ret);
-    return ifaces_count;
-
- error:
-    if (ifaces_ret) {
-        for (i = 0; i < ifaces_count; i++)
-            virDomainInterfaceFree(ifaces_ret[i]);
-    }
-    VIR_FREE(ifaces_ret);
-
-    return -1;
-}
-
-
-static int
-qemuARPGetInterfaces(virDomainObjPtr vm,
-                     virDomainInterfacePtr **ifaces)
-{
-    size_t i, j;
-    size_t ifaces_count = 0;
-    int ret = -1;
-    char macaddr[VIR_MAC_STRING_BUFLEN];
-    virDomainInterfacePtr *ifaces_ret = NULL;
-    virDomainInterfacePtr iface = NULL;
-    virArpTablePtr table;
-
-    table = virArpTableGet();
-    if (!table)
-        goto cleanup;
-
-    for (i = 0; i < vm->def->nnets; i++) {
-        virMacAddrFormat(&(vm->def->nets[i]->mac), macaddr);
-        for (j = 0; j < table->n; j++) {
-            virArpTableEntry entry = table->t[j];
-
-            if (STREQ(entry.mac, macaddr)) {
-                if (VIR_ALLOC(iface) < 0)
-                    goto cleanup;
-
-                iface->name = g_strdup(vm->def->nets[i]->ifname);
-
-                iface->hwaddr = g_strdup(macaddr);
-
-                if (VIR_ALLOC(iface->addrs) < 0)
-                    goto cleanup;
-                iface->naddrs = 1;
-
-                iface->addrs->addr = g_strdup(entry.ipaddr);
-
-                if (VIR_APPEND_ELEMENT(ifaces_ret, ifaces_count, iface) < 0)
-                    goto cleanup;
-            }
-        }
-    }
-
-    *ifaces = g_steal_pointer(&ifaces_ret);
-    ret = ifaces_count;
-
- cleanup:
-    virArpTableFree(table);
-    virDomainInterfaceFree(iface);
-
-    if (ifaces_ret) {
-        for (i = 0; i < ifaces_count; i++)
-            virDomainInterfaceFree(ifaces_ret[i]);
-    }
-    VIR_FREE(ifaces_ret);
-
-    return ret;
-}
-
-
 static int
 qemuDomainInterfaceAddresses(virDomainPtr dom,
                              virDomainInterfacePtr **ifaces,
@@ -22197,7 +22064,7 @@ qemuDomainInterfaceAddresses(virDomainPtr dom,
 
     switch (source) {
     case VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE:
-        ret = qemuGetDHCPInterfaces(vm, ifaces);
+        ret = virDomainNetDHCPInterfaces(vm->def, ifaces);
         break;
 
     case VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_AGENT:
@@ -22217,7 +22084,7 @@ qemuDomainInterfaceAddresses(virDomainPtr dom,
         break;
 
     case VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_ARP:
-        ret = qemuARPGetInterfaces(vm, ifaces);
+        ret = virDomainNetARPInterfaces(vm->def, ifaces);
         break;
 
     default: