From 5da9c98067846538bc1216179ea57c07f8282ef7 Mon Sep 17 00:00:00 2001 From: "Daniel P. Berrange" Date: Fri, 8 Jan 2010 15:53:53 +0000 Subject: [PATCH] Introduce device aliases This patch introduces the support for giving all devices a short, unique name, henceforth known as a 'device alias'. These aliases are not set by the end user, instead being assigned by the hypervisor if it decides it want to support this concept. The QEMU driver sets them whenever using the -device arg syntax and uses them for improved hotplug/hotunplug. it is the intent that other APIs (block / interface stats & device hotplug) be able to accept device alias names in the future. The XML syntax is This may appear in any type of device that supports device info. * src/conf/domain_conf.c, src/conf/domain_conf.h: Add a 'alias' field to virDomainDeviceInfo struct & parse/format it in XML * src/libvirt_private.syms: Export virDomainDefClearDeviceAliases * src/qemu/qemu_conf.c: Replace use of "nic_name" field with the standard device alias * src/qemu/qemu_driver.c: Clear device aliases at shutdown --- src/conf/domain_conf.c | 110 ++++++++++++++++++++++++++------------- src/conf/domain_conf.h | 4 +- src/libvirt_private.syms | 1 + src/qemu/qemu_conf.c | 8 +-- src/qemu/qemu_driver.c | 1 + 5 files changed, 82 insertions(+), 42 deletions(-) diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c index b2c8104e61..4a3c3745b5 100644 --- a/src/conf/domain_conf.c +++ b/src/conf/domain_conf.c @@ -806,50 +806,61 @@ int virDomainDeviceInfoIsSet(virDomainDeviceInfoPtr info) { if (info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) return 1; + if (info->alias) + return 1; return 0; } void virDomainDeviceInfoClear(virDomainDeviceInfoPtr info) { + VIR_FREE(info->alias); memset(&info->addr, 0, sizeof(info->addr)); info->type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE; } -static void virDomainDeviceInfoClearField(virDomainDeviceInfoPtr info) +static void virDomainDeviceInfoClearField(virDomainDeviceInfoPtr info, int alias, int pciaddr) { - if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) { + if (alias) + VIR_FREE(info->alias); + if (pciaddr && + info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) { memset(&info->addr, 0, sizeof(info->addr)); info->type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE; } } -static void virDomainDefClearDeviceInfo(virDomainDefPtr def) +static void virDomainDefClearDeviceInfo(virDomainDefPtr def, int alias, int pciaddr) { int i; for (i = 0; i < def->ndisks ; i++) - virDomainDeviceInfoClearField(&def->disks[i]->info); + virDomainDeviceInfoClearField(&def->disks[i]->info, alias, pciaddr); for (i = 0; i < def->nnets ; i++) - virDomainDeviceInfoClearField(&def->nets[i]->info); + virDomainDeviceInfoClearField(&def->nets[i]->info, alias, pciaddr); for (i = 0; i < def->nsounds ; i++) - virDomainDeviceInfoClearField(&def->sounds[i]->info); + virDomainDeviceInfoClearField(&def->sounds[i]->info, alias, pciaddr); for (i = 0; i < def->nhostdevs ; i++) - virDomainDeviceInfoClearField(&def->hostdevs[i]->info); + virDomainDeviceInfoClearField(&def->hostdevs[i]->info, alias, pciaddr); for (i = 0; i < def->nvideos ; i++) - virDomainDeviceInfoClearField(&def->videos[i]->info); + virDomainDeviceInfoClearField(&def->videos[i]->info, alias, pciaddr); for (i = 0; i < def->ncontrollers ; i++) - virDomainDeviceInfoClearField(&def->controllers[i]->info); + virDomainDeviceInfoClearField(&def->controllers[i]->info, alias, pciaddr); if (def->watchdog) - virDomainDeviceInfoClearField(&def->watchdog->info); + virDomainDeviceInfoClearField(&def->watchdog->info, alias, pciaddr); } void virDomainDefClearPCIAddresses(virDomainDefPtr def) { - virDomainDefClearDeviceInfo(def); + virDomainDefClearDeviceInfo(def, 0, 1); +} + +void virDomainDefClearDeviceAliases(virDomainDefPtr def) +{ + virDomainDefClearDeviceInfo(def, 1, 0); } @@ -857,7 +868,8 @@ void virDomainDefClearPCIAddresses(virDomainDefPtr def) * @param address Device address to stringify */ static int virDomainDeviceInfoFormat(virBufferPtr buf, - virDomainDeviceInfoPtr info) + virDomainDeviceInfoPtr info, + int flags) { if (!info) { virDomainReportError(NULL, VIR_ERR_INTERNAL_ERROR, "%s", @@ -865,6 +877,11 @@ static int virDomainDeviceInfoFormat(virBufferPtr buf, return -1; } + if (info->alias && + !(flags & VIR_DOMAIN_XML_INACTIVE)) { + virBufferVSprintf(buf, " \n", info->alias); + } + if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) return 0; @@ -1044,10 +1061,11 @@ static int virDomainDeviceInfoParseXML(virConnectPtr conn, xmlNodePtr node, virDomainDeviceInfoPtr info, - unsigned int flags ATTRIBUTE_UNUSED) + int flags) { xmlNodePtr cur; xmlNodePtr address = NULL; + xmlNodePtr alias = NULL; char *type = NULL; int ret = -1; @@ -1056,14 +1074,21 @@ virDomainDeviceInfoParseXML(virConnectPtr conn, cur = node->children; while (cur != NULL) { if (cur->type == XML_ELEMENT_NODE) { - if (address == NULL && - xmlStrEqual(cur->name, BAD_CAST "address")) { + if (alias == NULL && + !(flags & VIR_DOMAIN_XML_INACTIVE) && + xmlStrEqual(cur->name, BAD_CAST "alias")) { + alias = cur; + } else if (address == NULL && + xmlStrEqual(cur->name, BAD_CAST "address")) { address = cur; } } cur = cur->next; } + if (alias) + info->alias = virXMLPropString(alias, "name"); + if (!address) return 0; @@ -1102,6 +1127,8 @@ virDomainDeviceInfoParseXML(virConnectPtr conn, ret = 0; cleanup: + if (ret == -1) + VIR_FREE(info->alias); VIR_FREE(type); return ret; } @@ -1666,6 +1693,8 @@ virDomainNetDefParseXML(virConnectPtr conn, goto error; } def->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI; + def->info.alias = nic_name; + nic_name = NULL; } else { if (virDomainDeviceInfoParseXML(conn, node, &def->info, flags) < 0) goto error; @@ -1680,9 +1709,8 @@ virDomainNetDefParseXML(virConnectPtr conn, goto error; } - def->nic_name = nic_name; def->hostnet_name = hostnet_name; - nic_name = hostnet_name = NULL; + hostnet_name = NULL; def->vlan = -1; if (vlan && virStrToLong_i(vlan, NULL, 10, &def->vlan) < 0) { @@ -2930,6 +2958,10 @@ virDomainHostdevDefParseXML(virConnectPtr conn, if (virDomainHostdevSubsysPciDefParseXML(conn, cur, def, flags) < 0) goto error; } + } else if (xmlStrEqual(cur->name, BAD_CAST "address")) { + } else { + virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR, + _("unknown node %s"), cur->name); } } cur = cur->next; @@ -4499,7 +4531,8 @@ virDomainLifecycleDefFormat(virConnectPtr conn, static int virDomainDiskDefFormat(virConnectPtr conn, virBufferPtr buf, - virDomainDiskDefPtr def) + virDomainDiskDefPtr def, + int flags) { const char *type = virDomainDiskTypeToString(def->type); const char *device = virDomainDiskDeviceTypeToString(def->device); @@ -4576,7 +4609,7 @@ virDomainDiskDefFormat(virConnectPtr conn, virStorageEncryptionFormat(conn, buf, def->encryption) < 0) return -1; - if (virDomainDeviceInfoFormat(buf, &def->info) < 0) + if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0) return -1; virBufferAddLit(buf, " \n"); @@ -4587,7 +4620,8 @@ virDomainDiskDefFormat(virConnectPtr conn, static int virDomainControllerDefFormat(virConnectPtr conn, virBufferPtr buf, - virDomainControllerDefPtr def) + virDomainControllerDefPtr def, + int flags) { const char *type = virDomainControllerTypeToString(def->type); @@ -4603,7 +4637,7 @@ virDomainControllerDefFormat(virConnectPtr conn, if (virDomainDeviceInfoIsSet(&def->info)) { virBufferAddLit(buf, ">\n"); - if (virDomainDeviceInfoFormat(buf, &def->info) < 0) + if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0) return -1; virBufferAddLit(buf, " \n"); } else { @@ -4749,7 +4783,7 @@ virDomainNetDefFormat(virConnectPtr conn, virBufferAddLit(buf, "/>\n"); } - if (virDomainDeviceInfoFormat(buf, &def->info) < 0) + if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0) return -1; virBufferAddLit(buf, " \n"); @@ -4912,7 +4946,8 @@ cleanup: static int virDomainSoundDefFormat(virConnectPtr conn, virBufferPtr buf, - virDomainSoundDefPtr def) + virDomainSoundDefPtr def, + int flags) { const char *model = virDomainSoundModelTypeToString(def->model); @@ -4927,7 +4962,7 @@ virDomainSoundDefFormat(virConnectPtr conn, if (virDomainDeviceInfoIsSet(&def->info)) { virBufferAddLit(buf, ">\n"); - if (virDomainDeviceInfoFormat(buf, &def->info) < 0) + if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0) return -1; virBufferAddLit(buf, " \n"); } else { @@ -4941,7 +4976,8 @@ virDomainSoundDefFormat(virConnectPtr conn, static int virDomainWatchdogDefFormat(virConnectPtr conn, virBufferPtr buf, - virDomainWatchdogDefPtr def) + virDomainWatchdogDefPtr def, + int flags) { const char *model = virDomainWatchdogModelTypeToString (def->model); const char *action = virDomainWatchdogActionTypeToString (def->action); @@ -4963,7 +4999,7 @@ virDomainWatchdogDefFormat(virConnectPtr conn, if (virDomainDeviceInfoIsSet(&def->info)) { virBufferAddLit(buf, ">\n"); - if (virDomainDeviceInfoFormat(buf, &def->info) < 0) + if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0) return -1; virBufferAddLit(buf, " \n"); } else { @@ -4989,7 +5025,8 @@ virDomainVideoAccelDefFormat(virBufferPtr buf, static int virDomainVideoDefFormat(virConnectPtr conn, virBufferPtr buf, - virDomainVideoDefPtr def) + virDomainVideoDefPtr def, + int flags) { const char *model = virDomainVideoTypeToString(def->type); @@ -5014,7 +5051,7 @@ virDomainVideoDefFormat(virConnectPtr conn, virBufferAddLit(buf, "/>\n"); } - if (virDomainDeviceInfoFormat(buf, &def->info) < 0) + if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0) return -1; virBufferAddLit(buf, " \n"); @@ -5146,7 +5183,8 @@ virDomainGraphicsDefFormat(virConnectPtr conn, static int virDomainHostdevDefFormat(virConnectPtr conn, virBufferPtr buf, - virDomainHostdevDefPtr def) + virDomainHostdevDefPtr def, + int flags) { const char *mode = virDomainHostdevModeTypeToString(def->mode); const char *type; @@ -5190,7 +5228,7 @@ virDomainHostdevDefFormat(virConnectPtr conn, virBufferAddLit(buf, " \n"); - if (virDomainDeviceInfoFormat(buf, &def->info) < 0) + if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0) return -1; virBufferAddLit(buf, " \n"); @@ -5357,11 +5395,11 @@ char *virDomainDefFormat(virConnectPtr conn, def->emulator); for (n = 0 ; n < def->ndisks ; n++) - if (virDomainDiskDefFormat(conn, &buf, def->disks[n]) < 0) + if (virDomainDiskDefFormat(conn, &buf, def->disks[n], flags) < 0) goto cleanup; for (n = 0 ; n < def->ncontrollers ; n++) - if (virDomainControllerDefFormat(conn, &buf, def->controllers[n]) < 0) + if (virDomainControllerDefFormat(conn, &buf, def->controllers[n], flags) < 0) goto cleanup; for (n = 0 ; n < def->nfss ; n++) @@ -5421,19 +5459,19 @@ char *virDomainDefFormat(virConnectPtr conn, } for (n = 0 ; n < def->nsounds ; n++) - if (virDomainSoundDefFormat(conn, &buf, def->sounds[n]) < 0) + if (virDomainSoundDefFormat(conn, &buf, def->sounds[n], flags) < 0) goto cleanup; for (n = 0 ; n < def->nvideos ; n++) - if (virDomainVideoDefFormat(conn, &buf, def->videos[n]) < 0) + if (virDomainVideoDefFormat(conn, &buf, def->videos[n], flags) < 0) goto cleanup; for (n = 0 ; n < def->nhostdevs ; n++) - if (virDomainHostdevDefFormat(conn, &buf, def->hostdevs[n]) < 0) + if (virDomainHostdevDefFormat(conn, &buf, def->hostdevs[n], flags) < 0) goto cleanup; if (def->watchdog) - virDomainWatchdogDefFormat (conn, &buf, def->watchdog); + virDomainWatchdogDefFormat (conn, &buf, def->watchdog, flags); virBufferAddLit(&buf, " \n"); diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h index a6f7ab2551..87fbba7d76 100644 --- a/src/conf/domain_conf.h +++ b/src/conf/domain_conf.h @@ -92,6 +92,7 @@ struct _virDomainDeviceDriveAddress { typedef struct _virDomainDeviceInfo virDomainDeviceInfo; typedef virDomainDeviceInfo *virDomainDeviceInfoPtr; struct _virDomainDeviceInfo { + char *alias; int type; union { virDomainDevicePCIAddress pci; @@ -246,8 +247,6 @@ struct _virDomainNetDef { char *ifname; virDomainDeviceInfo info; /* XXX figure out how to remove this */ - char *nic_name; - /* XXX figure out how to remove this */ char *hostnet_name; /* XXX figure out how to remove this */ int vlan; @@ -737,6 +736,7 @@ int virDomainDeviceDriveAddressIsValid(virDomainDeviceDriveAddressPtr addr); int virDomainDeviceInfoIsSet(virDomainDeviceInfoPtr info); void virDomainDeviceInfoClear(virDomainDeviceInfoPtr info); void virDomainDefClearPCIAddresses(virDomainDefPtr def); +void virDomainDefClearDeviceAliases(virDomainDefPtr def); void virDomainDefFree(virDomainDefPtr vm); void virDomainObjRef(virDomainObjPtr vm); diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 46c0902d64..96d05abef4 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -188,6 +188,7 @@ virDomainControllerDefFree; virDomainDeviceAddressTypeToString; virDomainDefAddDiskControllers; virDomainDefClearPCIAddresses; +virDomainDefClearDeviceAliases; # domain_event.h diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index 6414bd0c41..65823e6499 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -1489,7 +1489,7 @@ qemuAssignNetNames(virDomainDefPtr def, if (def->nets[i] == net) continue; - if (!def->nets[i]->nic_name || !def->nets[i]->hostnet_name) + if (!def->nets[i]->info.alias || !def->nets[i]->hostnet_name) continue; if ((def->nets[i]->model == NULL && net->model == NULL) || @@ -1517,7 +1517,7 @@ qemuAssignNetNames(virDomainDefPtr def, return -1; } - net->nic_name = nic_name; + net->info.alias = nic_name; net->hostnet_name = hostnet_name; return 0; @@ -1714,8 +1714,8 @@ qemuBuildNicStr(virConnectPtr conn, vlan, (net->model ? ",model=" : ""), (net->model ? net->model : ""), - (net->nic_name ? ",name=" : ""), - (net->nic_name ? net->nic_name : "")) < 0) { + (net->info.alias ? ",name=" : ""), + (net->info.alias ? net->info.alias : "")) < 0) { virReportOOMError(conn); return -1; } diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 0a35b97bde..365921f512 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -3049,6 +3049,7 @@ static void qemudShutdownVMDaemon(virConnectPtr conn, } virDomainDefClearPCIAddresses(vm->def); + virDomainDefClearDeviceAliases(vm->def); if (qemuDomainSetAllDeviceOwnership(conn, driver, vm->def, 1) < 0) VIR_WARN("Failed to restore all device ownership for %s", -- GitLab