>From 226239905ec9b01fd0bd0ce050de97d7f0d9e19c Mon Sep 17 00:00:00 2001
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Date: Wed, 18 May 2011 15:14:28 +0900
Subject: [PATCH] qemu - support persistent add/delete network interface
This patch allows to modify interfaces of domain(qemu).
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
* src/conf/domain_conf.c:
(virDomainNetInsert) : Insert a network device to domain definition.
(virDomainNetIndexByMac/Ifname) : Returns an index of net device in array.
(virDomainNetRemoveByMac): Remove a NIC of passed MAC address.
* src/qemu/qemu_driver.c
(qemuDomainAttachDeviceConfig): add codes for NIC.
(qemuDomainDetachDeviceConfig): add codes for NIC.
---
src/conf/domain_conf.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++
src/conf/domain_conf.h | 5 ++++
src/libvirt_private.syms | 4 +++
src/qemu/qemu_driver.c | 32 ++++++++++++++++++++++++++
4 files changed, 96 insertions(+), 0 deletions(-)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 498438a..de9abe9 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -5163,6 +5163,61 @@ int virDomainDiskRemoveByName(virDomainDefPtr def, const char *name)
return 0;
}
+int virDomainNetInsert(virDomainDefPtr def, virDomainNetDefPtr net)
+{
+ if (VIR_REALLOC_N(def->nets, def->nnets) < 0)
+ return -1;
+ def->nets[def->nnets] = net;
+ def->nnets++;
+ return 0;
+}
+
+int virDomainNetIndexByMac(virDomainDefPtr def, const unsigned char *mac)
+{
+ int i;
+
+ for (i = 0; i < def->nnets; i++)
+ if (!memcmp(def->nets[i]->mac, mac, VIR_MAC_BUFLEN))
+ return i;
+ return -1;
+}
+
+int virDomainNetIndexByIfname(virDomainDefPtr def, const char *name)
+{
+ int i;
+
+ for (i = 0; i < def->nnets; i++)
+ if (def->nets[i]->ifname && STREQ(def->nets[i]->ifname, name))
+ return i;
+ return -1;
+}
+
+static void virDomainNetRemove(virDomainDefPtr def, size_t i)
+{
+ if (def->nnets > 1) {
+ memmove(def->nets + i,
+ def->nets + i + 1,
+ sizeof(*def->nets) * (def->nnets - (i + 1)));
+ def->nnets--;
+ if (VIR_REALLOC_N(def->nets, def->nnets) < 0) {
+ /* ignore harmless */
+ }
+ } else {
+ VIR_FREE(def->nets);
+ def->nnets = 0;
+ }
+}
+
+int virDomainNetRemoveByMac(virDomainDefPtr def, const unsigned char *mac)
+{
+ int i = virDomainNetIndexByMac(def, mac);
+
+ if (i < 0)
+ return -1;
+ virDomainNetRemove(def, i);
+ return 0;
+}
+
int virDomainControllerInsert(virDomainDefPtr def,
virDomainControllerDefPtr controller)
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index fe42f21..274e22b 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1359,6 +1359,11 @@ int virDomainDiskDefAssignAddress(virCapsPtr caps, virDomainDiskDefPtr def);
void virDomainDiskRemove(virDomainDefPtr def, size_t i);
int virDomainDiskRemoveByName(virDomainDefPtr def, const char *name);
+int virDomainNetIndexByMac(virDomainDefPtr def, const unsigned char *mac);
+int virDomainNetIndexByIfname(virDomainDefPtr def, const char *iface);
+int virDomainNetInsert(virDomainDefPtr def, virDomainNetDefPtr net);
+int virDomainNetRemoveByMac(virDomainDefPtr def, const unsigned char *mac);
+
int virDomainControllerInsert(virDomainDefPtr def,
virDomainControllerDefPtr controller);
void virDomainControllerInsertPreAlloced(virDomainDefPtr def,
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 7b6151c..2695c2e 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -290,6 +290,10 @@ virDomainLoadAllConfigs;
virDomainMemballoonModelTypeFromString;
virDomainMemballoonModelTypeToString;
virDomainNetDefFree;
+virDomainNetIndexByIfname;
+virDomainNetIndexByMac;
+virDomainNetInsert;
+virDomainNetRemoveByMac;
virDomainNetTypeToString;
virDomainObjAssignDef;
virDomainObjCopyPersistentDef;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index fdb3b30..0a547eb 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -4245,6 +4245,7 @@ qemuDomainAttachDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr disk;
+ virDomainNetDefPtr net;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
@@ -4267,6 +4268,28 @@ qemuDomainAttachDeviceConfig(virDomainDefPtr vmdef,
return -1;
break;
+ case VIR_DOMAIN_DEVICE_NET:
+ net = dev->data.net;
+ if (net->ifname && virDomainNetIndexByIfname(vmdef, net->ifname)) {
+ qemuReportError(VIR_ERR_INVALID_ARG,
+ _("iface %s already exists"), net->ifname);
+ return -1;
+ }
+ if (virDomainNetIndexByMac(vmdef, net->mac) >= 0) {
+ char macbuf[VIR_MAC_STRING_BUFLEN];
+ virFormatMacAddr(net->mac, macbuf);
+ qemuReportError(VIR_ERR_INVALID_ARG,
+ _("mac %s already exists"), macbuf);
+ return -1;
+ }
+ if (virDomainNetInsert(vmdef, net)) {
+ virReportOOMError();
+ return -1;
+ }
+ dev->data.net = NULL;
+ if (qemuDomainAssignPCIAddresses(vmdef) < 0)
+ return -1;
+ break;
default:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("persistent attach of device is not supported"));
@@ -4281,6 +4304,7 @@ qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
virDomainDeviceDefPtr dev)
{
virDomainDiskDefPtr disk;
+ virDomainNetDefPtr net;
switch (dev->type) {
case VIR_DOMAIN_DEVICE_DISK:
@@ -4291,6 +4315,14 @@ qemuDomainDetachDeviceConfig(virDomainDefPtr vmdef,
return -1;
}
break;
+ case VIR_DOMAIN_DEVICE_NET:
+ net = dev->data.net;
+ if (virDomainNetRemoveByMac(vmdef, net->mac)) {
+ qemuReportError(VIR_ERR_INVALID_ARG,
+ _("no target device %s"), disk->dst);
+ return -1;
+ }
+ break;
default:
qemuReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("persistent detach of device is not supported"));
--
1.7.4.1
--
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