[libvirt] [PATCH 2/2] libvirt/qemu : allow persistent modification of netifs via A(De)ttachDeviceFlags

From: KAMEZAWA Hiroyuki <kamezawa(a)bluextal.(none)&gt; Date: Wed, 23 Feb 2011 17:25:07 +0900 Subject: [PATCH 2/2] libvirt/qemu : allow persistent modification of netifs via A(De)ttachDeviceFlags This patch allows virsh attach/detach-interface --persistent... with qemu. Xen supports this behavior now. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu(a)jp.fujitsu.com&gt; --- src/conf/domain_conf.c | 25 ++++++++++++++++++++ src/conf/domain_conf.h | 3 ++ src/libvirt_private.syms | 2 + src/qemu/qemu_driver.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 87 insertions(+), 0 deletions(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index b97c1f0..dcbf756 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -4924,6 +4924,31 @@ void virDomainDiskRemove(virDomainDefPtr def, size_t i) } } +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; +} + +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 virDomainControllerInsert(virDomainDefPtr def, virDomainControllerDefPtr controller) diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index 30aeccc..396dfbc 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -1270,6 +1270,9 @@ int virDomainDiskDefAssignAddress(virCapsPtr caps, virDomainDiskDefPtr def); void virDomainDiskRemove(virDomainDefPtr def, size_t i); +void virDomainNetInsert(virDomainDefPtr def, virDomainNetDefPtr net); +void virDomainNetRemove(virDomainDefPtr def, size_t i); + int virDomainControllerInsert(virDomainDefPtr def, virDomainControllerDefPtr controller); void virDomainControllerInsertPreAlloced(virDomainDefPtr def, diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 797a670..eef5266 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -245,6 +245,8 @@ virDomainDiskIoTypeToString; virDomainDiskRemove; virDomainDiskTypeFromString; virDomainDiskTypeToString; +virDomainNetInsert; +virDomainNetRemove; virDomainFSDefFree; virDomainFindByID; virDomainFindByName; diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 703f86a..ab697cd 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -4094,6 +4094,22 @@ static int qemuDomainFindDiskByName(virDomainDefPtr vmdef, const char *name) } return -1; } + +static int qemuDomainFindNetByName(virDomainDefPtr vmdef, + const unsigned char *mac, const char *ifname) +{ + virDomainNetDefPtr net; + int i; + + for (i = 0; i < vmdef->nnets; i++) { + net = vmdef->nets[i]; + if (!strcmp((char*)net->mac, (char*)mac)) + return i; + if (ifname && !strcmp((char*)net->ifname, (char*)ifname)) + return i; + } + return -1; +} /* * Attach a device given by XML, the change will be persistent * and domain XML definition file is updated. @@ -4102,6 +4118,7 @@ static int qemuDomainAttachDevicePersistent(virDomainDefPtr vmdef, virDomainDeviceDefPtr newdev) { virDomainDiskDefPtr disk; + virDomainNetDefPtr net; /* At first, check device confliction */ switch(newdev->type) { @@ -4128,6 +4145,22 @@ static int qemuDomainAttachDevicePersistent(virDomainDefPtr vmdef, } newdev->data.disk = NULL; break; + case VIR_DOMAIN_DEVICE_NET: + net = newdev->data.net; + if (qemuDomainFindNetByName(vmdef, net->mac, net->ifname) >= 0) { + qemuReportError(VIR_ERR_INVALID_ARG, + _("target %s already exists."), disk->dst); + return -1; + } + + if (virDomainNetInsert(vmdef, net)) { + virReportOOMError(); + return -1; + } + /* always PCI ? */ + qemuDomainAssignPCIAddresses(vmdef); + newdev->data.net = NULL; + break; default: qemuReportError(VIR_ERR_INVALID_ARG, "%s", _("Sorry, the device is not suppored for now")); @@ -4142,6 +4175,7 @@ static int qemuDomainDetachDevicePersistent(virDomainDefPtr vmdef, { int x; virDomainDiskDefPtr disk; + virDomainNetDefPtr net; switch(device->type) { case VIR_DOMAIN_DEVICE_DISK: @@ -4154,6 +4188,29 @@ static int qemuDomainDetachDevicePersistent(virDomainDefPtr vmdef, } virDomainDiskRemove(vmdef, x); break; + case VIR_DOMAIN_DEVICE_NET: + net = device->data.net; + /* need to find mac address */ + if (net->ifname == NULL && strlen((char*)net->mac) == 0) { + qemuReportError(VIR_ERR_INVALID_ARG, "%s", + _("interface mac or name must be specified.")); + return -1; + } + net = device->data.net; + x = qemuDomainFindNetByName(vmdef, net->mac, net->ifname); + if (x < 0) { + if (net->ifname) + qemuReportError(VIR_ERR_INVALID_ARG, + _("interface mac: %s name: %s doesn't exist."), + net->mac, net->ifname); + else + qemuReportError(VIR_ERR_INVALID_ARG, + _("interface mac: %s doesn't exist."), + net->mac); + return -1; + } + virDomainNetRemove(vmdef, x); + break; default: qemuReportError(VIR_ERR_INVALID_ARG, "%s", _("Sorry, the device is not suppored for now")); -- 1.7.1