/* * bridge_driver.c: core driver methods for managing network * * Copyright (C) 2006-2016 Red Hat, Inc. * Copyright (C) 2006 Daniel P. Berrange * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library. If not, see * . */ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_SYSCTLBYNAME # include #endif #include "virerror.h" #include "datatypes.h" #include "bridge_driver.h" #include "bridge_driver_platform.h" #include "device_conf.h" #include "driver.h" #include "virbuffer.h" #include "virpidfile.h" #include "vircommand.h" #include "viralloc.h" #include "viruuid.h" #include "viriptables.h" #include "virlog.h" #include "virdnsmasq.h" #include "configmake.h" #include "virnetlink.h" #include "virnetdev.h" #include "virnetdevip.h" #include "virnetdevbridge.h" #include "virnetdevopenvswitch.h" #include "virnetdevtap.h" #include "virnetdevvportprofile.h" #include "virpci.h" #include "virdbus.h" #include "virfile.h" #include "virstring.h" #include "viraccessapicheck.h" #include "network_event.h" #include "virhook.h" #include "virjson.h" #include "virnetworkportdef.h" #define VIR_FROM_THIS VIR_FROM_NETWORK #define MAX_BRIDGE_ID 256 /** * VIR_NETWORK_DHCP_LEASE_FILE_SIZE_MAX: * * Macro providing the upper limit on the size of leases file */ #define VIR_NETWORK_DHCP_LEASE_FILE_SIZE_MAX (32 * 1024 * 1024) #define SYSCTL_PATH "/proc/sys" VIR_LOG_INIT("network.bridge_driver"); static virNetworkDriverStatePtr network_driver; static virNetworkDriverStatePtr networkGetDriver(void) { /* Maybe one day we can store @network_driver in the * connection object, but until then, it's just a global * variable which is returned. */ return network_driver; } static void networkDriverLock(virNetworkDriverStatePtr driver) { virMutexLock(&driver->lock); } static void networkDriverUnlock(virNetworkDriverStatePtr driver) { virMutexUnlock(&driver->lock); } static dnsmasqCapsPtr networkGetDnsmasqCaps(virNetworkDriverStatePtr driver) { dnsmasqCapsPtr ret; networkDriverLock(driver); ret = virObjectRef(driver->dnsmasqCaps); networkDriverUnlock(driver); return ret; } static int networkDnsmasqCapsRefresh(virNetworkDriverStatePtr driver) { dnsmasqCapsPtr caps; if (!(caps = dnsmasqCapsNewFromBinary(DNSMASQ))) return -1; networkDriverLock(driver); virObjectUnref(driver->dnsmasqCaps); driver->dnsmasqCaps = caps; networkDriverUnlock(driver); return 0; } static void networkDnsmasqDefNamespaceFree(void *nsdata) { networkDnsmasqXmlNsDefPtr def = nsdata; if (!def) return; virStringListFreeCount(def->options, def->noptions); VIR_FREE(def); } static int networkDnsmasqDefNamespaceParseOptions(networkDnsmasqXmlNsDefPtr nsdef, xmlXPathContextPtr ctxt) { g_autofree xmlNodePtr *nodes = NULL; ssize_t nnodes; size_t i; if ((nnodes = virXPathNodeSet("./dnsmasq:options/dnsmasq:option", ctxt, &nodes)) < 0) return -1; if (nnodes == 0) return 0; if (VIR_ALLOC_N(nsdef->options, nnodes) < 0) return -1; for (i = 0; i < nnodes; i++) { if (!(nsdef->options[nsdef->noptions++] = virXMLPropString(nodes[i], "value"))) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("No dnsmasq options value specified")); return -1; } } return 0; } static int networkDnsmasqDefNamespaceParse(xmlXPathContextPtr ctxt, void **data) { networkDnsmasqXmlNsDefPtr nsdata = NULL; int ret = -1; if (VIR_ALLOC(nsdata) < 0) return -1; if (networkDnsmasqDefNamespaceParseOptions(nsdata, ctxt)) goto cleanup; if (nsdata->noptions > 0) VIR_STEAL_PTR(*data, nsdata); ret = 0; cleanup: networkDnsmasqDefNamespaceFree(nsdata); return ret; } static int networkDnsmasqDefNamespaceFormatXML(virBufferPtr buf, void *nsdata) { networkDnsmasqXmlNsDefPtr def = nsdata; size_t i; if (!def->noptions) return 0; virBufferAddLit(buf, "\n"); virBufferAdjustIndent(buf, 2); for (i = 0; i < def->noptions; i++) { virBufferEscapeString(buf, "\n", def->options[i]); } virBufferAdjustIndent(buf, -2); virBufferAddLit(buf, "\n"); return 0; } virXMLNamespace networkDnsmasqXMLNamespace = { .parse = networkDnsmasqDefNamespaceParse, .free = networkDnsmasqDefNamespaceFree, .format = networkDnsmasqDefNamespaceFormatXML, .prefix = "dnsmasq", .uri = "http://libvirt.org/schemas/network/dnsmasq/1.0", }; virNetworkXMLOptionPtr networkDnsmasqCreateXMLConf(void) { return virNetworkXMLOptionNew(&networkDnsmasqXMLNamespace); } static int networkStateCleanup(void); static int networkStartNetwork(virNetworkDriverStatePtr driver, virNetworkObjPtr obj); static int networkShutdownNetwork(virNetworkDriverStatePtr driver, virNetworkObjPtr obj); static int networkStartNetworkVirtual(virNetworkDriverStatePtr driver, virNetworkObjPtr obj); static int networkShutdownNetworkVirtual(virNetworkDriverStatePtr driver, virNetworkObjPtr obj); static int networkStartNetworkExternal(virNetworkObjPtr obj); static int networkShutdownNetworkExternal(virNetworkObjPtr obj); static void networkReloadFirewallRules(virNetworkDriverStatePtr driver, bool startup); static void networkRefreshDaemons(virNetworkDriverStatePtr driver); static int networkPlugBandwidth(virNetworkObjPtr obj, virMacAddrPtr mac, virNetDevBandwidthPtr ifaceBand, unsigned int *class_id); static int networkUnplugBandwidth(virNetworkObjPtr obj, virNetDevBandwidthPtr ifaceBand, unsigned int *class_id); static void networkNetworkObjTaint(virNetworkObjPtr obj, virNetworkTaintFlags taint); static virNetworkObjPtr networkObjFromNetwork(virNetworkPtr net) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkObjPtr obj; char uuidstr[VIR_UUID_STRING_BUFLEN]; obj = virNetworkObjFindByUUID(driver->networks, net->uuid); if (!obj) { virUUIDFormat(net->uuid, uuidstr); virReportError(VIR_ERR_NO_NETWORK, _("no network with matching uuid '%s' (%s)"), uuidstr, net->name); } return obj; } static int networkRunHook(virNetworkObjPtr obj, virNetworkPortDefPtr port, int op, int sub_op) { virNetworkDefPtr def; virBuffer buf = VIR_BUFFER_INITIALIZER; char *xml = NULL; int hookret; int ret = -1; if (virHookPresent(VIR_HOOK_DRIVER_NETWORK)) { if (!obj) { VIR_DEBUG("Not running hook as @obj is NULL"); ret = 0; goto cleanup; } def = virNetworkObjGetDef(obj); virBufferAddLit(&buf, "\n"); virBufferAdjustIndent(&buf, 2); if (virNetworkDefFormatBuf(&buf, def, network_driver->xmlopt, 0) < 0) goto cleanup; if (port && virNetworkPortDefFormatBuf(&buf, port) < 0) goto cleanup; virBufferAdjustIndent(&buf, -2); virBufferAddLit(&buf, ""); if (virBufferCheckError(&buf) < 0) goto cleanup; xml = virBufferContentAndReset(&buf); hookret = virHookCall(VIR_HOOK_DRIVER_NETWORK, def->name, op, sub_op, NULL, xml, NULL); /* * If the script raised an error, pass it to the callee. */ if (hookret < 0) goto cleanup; networkNetworkObjTaint(obj, VIR_NETWORK_TAINT_HOOK); } ret = 0; cleanup: virBufferFreeAndReset(&buf); VIR_FREE(xml); return ret; } static char * networkDnsmasqLeaseFileNameDefault(virNetworkDriverStatePtr driver, const char *netname) { char *leasefile; ignore_value(virAsprintf(&leasefile, "%s/%s.leases", driver->dnsmasqStateDir, netname)); return leasefile; } static char * networkDnsmasqLeaseFileNameCustom(virNetworkDriverStatePtr driver, const char *bridge) { char *leasefile; ignore_value(virAsprintf(&leasefile, "%s/%s.status", driver->dnsmasqStateDir, bridge)); return leasefile; } static char * networkDnsmasqConfigFileName(virNetworkDriverStatePtr driver, const char *netname) { char *conffile; ignore_value(virAsprintf(&conffile, "%s/%s.conf", driver->dnsmasqStateDir, netname)); return conffile; } static char * networkRadvdPidfileBasename(const char *netname) { /* this is simple but we want to be sure it's consistently done */ char *pidfilebase; ignore_value(virAsprintf(&pidfilebase, "%s-radvd", netname)); return pidfilebase; } static char * networkRadvdConfigFileName(virNetworkDriverStatePtr driver, const char *netname) { char *configfile; ignore_value(virAsprintf(&configfile, "%s/%s-radvd.conf", driver->radvdStateDir, netname)); return configfile; } /* do needed cleanup steps and remove the network from the list */ static int networkRemoveInactive(virNetworkDriverStatePtr driver, virNetworkObjPtr obj) { char *leasefile = NULL; char *customleasefile = NULL; char *radvdconfigfile = NULL; char *configfile = NULL; char *radvdpidbase = NULL; char *statusfile = NULL; char *macMapFile = NULL; dnsmasqContext *dctx = NULL; virNetworkDefPtr def = virNetworkObjGetPersistentDef(obj); int ret = -1; /* remove the (possibly) existing dnsmasq and radvd files */ if (!(dctx = dnsmasqContextNew(def->name, driver->dnsmasqStateDir))) { goto cleanup; } if (!(leasefile = networkDnsmasqLeaseFileNameDefault(driver, def->name))) goto cleanup; if (!(customleasefile = networkDnsmasqLeaseFileNameCustom(driver, def->bridge))) goto cleanup; if (!(radvdconfigfile = networkRadvdConfigFileName(driver, def->name))) goto cleanup; if (!(radvdpidbase = networkRadvdPidfileBasename(def->name))) goto cleanup; if (!(configfile = networkDnsmasqConfigFileName(driver, def->name))) goto cleanup; if (!(statusfile = virNetworkConfigFile(driver->stateDir, def->name))) goto cleanup; if (!(macMapFile = virMacMapFileName(driver->dnsmasqStateDir, def->bridge))) goto cleanup; /* dnsmasq */ dnsmasqDelete(dctx); unlink(leasefile); unlink(customleasefile); unlink(configfile); /* MAC map manager */ unlink(macMapFile); /* radvd */ unlink(radvdconfigfile); virPidFileDelete(driver->pidDir, radvdpidbase); /* remove status file */ unlink(statusfile); /* remove the network definition */ virNetworkObjRemoveInactive(driver->networks, obj); ret = 0; cleanup: VIR_FREE(leasefile); VIR_FREE(configfile); VIR_FREE(customleasefile); VIR_FREE(radvdconfigfile); VIR_FREE(radvdpidbase); VIR_FREE(statusfile); VIR_FREE(macMapFile); dnsmasqContextFree(dctx); return ret; } static char * networkBridgeDummyNicName(const char *brname) { static const char dummyNicSuffix[] = "-nic"; char *nicname; if (strlen(brname) + sizeof(dummyNicSuffix) > IFNAMSIZ) { /* because the length of an ifname is limited to IFNAMSIZ-1 * (usually 15), and we're adding 4 more characters, we must * truncate the original name to 11 to fit. In order to catch * a possible numeric ending (eg virbr0, virbr1, etc), we grab * the first 8 and last 3 characters of the string. */ ignore_value(virAsprintf(&nicname, "%.*s%s%s", /* space for last 3 chars + "-nic" + NULL */ (int)(IFNAMSIZ - (3 + sizeof(dummyNicSuffix))), brname, brname + strlen(brname) - 3, dummyNicSuffix)); } else { ignore_value(virAsprintf(&nicname, "%s%s", brname, dummyNicSuffix)); } return nicname; } static int networkNotifyPort(virNetworkObjPtr obj, virNetworkPortDefPtr port); static bool networkUpdatePort(virNetworkPortDefPtr port, void *opaque) { virNetworkObjPtr obj = opaque; networkNotifyPort(obj, port); return false; } static int networkUpdateState(virNetworkObjPtr obj, void *opaque) { virNetworkDefPtr def; virNetworkDriverStatePtr driver = opaque; dnsmasqCapsPtr dnsmasq_caps = networkGetDnsmasqCaps(driver); virMacMapPtr macmap; char *macMapFile = NULL; int ret = -1; virObjectLock(obj); if (!virNetworkObjIsActive(obj)) { ret = 0; goto cleanup; } def = virNetworkObjGetDef(obj); switch ((virNetworkForwardType) def->forward.type) { case VIR_NETWORK_FORWARD_NONE: case VIR_NETWORK_FORWARD_NAT: case VIR_NETWORK_FORWARD_ROUTE: case VIR_NETWORK_FORWARD_OPEN: /* If bridge doesn't exist, then mark it inactive */ if (!(def->bridge && virNetDevExists(def->bridge) == 1)) virNetworkObjSetActive(obj, false); if (!(macMapFile = virMacMapFileName(driver->dnsmasqStateDir, def->bridge))) goto cleanup; if (!(macmap = virMacMapNew(macMapFile))) goto cleanup; virNetworkObjSetMacMap(obj, macmap); break; case VIR_NETWORK_FORWARD_BRIDGE: if (def->bridge) { if (virNetDevExists(def->bridge) != 1) virNetworkObjSetActive(obj, false); break; } /* intentionally drop through to common case for all * macvtap networks (forward='bridge' with no bridge * device defined is macvtap using its 'bridge' mode) */ case VIR_NETWORK_FORWARD_PRIVATE: case VIR_NETWORK_FORWARD_VEPA: case VIR_NETWORK_FORWARD_PASSTHROUGH: /* so far no extra checks */ break; case VIR_NETWORK_FORWARD_HOSTDEV: /* so far no extra checks */ break; case VIR_NETWORK_FORWARD_LAST: default: virReportEnumRangeError(virNetworkForwardType, def->forward.type); goto cleanup; } virNetworkObjPortForEach(obj, networkUpdatePort, obj); /* Try and read dnsmasq/radvd pids of active networks */ if (virNetworkObjIsActive(obj) && def->ips && (def->nips > 0)) { pid_t radvdPid; pid_t dnsmasqPid; char *radvdpidbase; ignore_value(virPidFileReadIfAlive(driver->pidDir, def->name, &dnsmasqPid, dnsmasqCapsGetBinaryPath(dnsmasq_caps))); virNetworkObjSetDnsmasqPid(obj, dnsmasqPid); radvdpidbase = networkRadvdPidfileBasename(def->name); if (!radvdpidbase) goto cleanup; ignore_value(virPidFileReadIfAlive(driver->pidDir, radvdpidbase, &radvdPid, RADVD)); virNetworkObjSetRadvdPid(obj, radvdPid); VIR_FREE(radvdpidbase); } ret = 0; cleanup: virObjectUnlock(obj); virObjectUnref(dnsmasq_caps); VIR_FREE(macMapFile); return ret; } static int networkAutostartConfig(virNetworkObjPtr obj, void *opaque) { virNetworkDriverStatePtr driver = opaque; int ret = -1; virObjectLock(obj); if (virNetworkObjIsAutostart(obj) && !virNetworkObjIsActive(obj) && networkStartNetwork(driver, obj) < 0) goto cleanup; ret = 0; cleanup: virObjectUnlock(obj); return ret; } #ifdef WITH_FIREWALLD static DBusHandlerResult firewalld_dbus_filter_bridge(DBusConnection *connection G_GNUC_UNUSED, DBusMessage *message, void *user_data) { virNetworkDriverStatePtr driver = user_data; bool reload = false; if (dbus_message_is_signal(message, "org.fedoraproject.FirewallD1", "Reloaded")) { reload = true; } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) { g_autofree char *name = NULL; g_autofree char *old_owner = NULL; g_autofree char *new_owner = NULL; if (virDBusMessageDecode(message, "sss", &name, &old_owner, &new_owner) < 0) { VIR_WARN("Failed to decode DBus NameOwnerChanged message"); return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; } /* * if new_owner is empty, firewalld is shutting down. If it is * non-empty, then it is starting */ if (new_owner && *new_owner) reload = true; } if (reload) { VIR_DEBUG("Reload in bridge_driver because of firewalld."); networkReloadFirewallRules(driver, false); } return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; } #endif /** * networkStateInitialize: * * Initialization function for the QEMU daemon */ static int networkStateInitialize(bool privileged, virStateInhibitCallback callback G_GNUC_UNUSED, void *opaque G_GNUC_UNUSED) { int ret = VIR_DRV_STATE_INIT_ERROR; char *configdir = NULL; char *rundir = NULL; bool autostart = true; #ifdef WITH_FIREWALLD DBusConnection *sysbus = NULL; #endif if (VIR_ALLOC(network_driver) < 0) goto error; network_driver->lockFD = -1; if (virMutexInit(&network_driver->lock) < 0) { VIR_FREE(network_driver); goto error; } network_driver->privileged = privileged; if (!(network_driver->xmlopt = networkDnsmasqCreateXMLConf())) goto error; /* configuration/state paths are one of * ~/.config/libvirt/... (session/unprivileged) * /etc/libvirt/... && /var/(run|lib)/libvirt/... (system/privileged). */ if (privileged) { if (VIR_STRDUP(network_driver->networkConfigDir, SYSCONFDIR "/libvirt/qemu/networks") < 0 || VIR_STRDUP(network_driver->networkAutostartDir, SYSCONFDIR "/libvirt/qemu/networks/autostart") < 0 || VIR_STRDUP(network_driver->stateDir, RUNSTATEDIR "/libvirt/network") < 0 || VIR_STRDUP(network_driver->pidDir, RUNSTATEDIR "/libvirt/network") < 0 || VIR_STRDUP(network_driver->dnsmasqStateDir, LOCALSTATEDIR "/lib/libvirt/dnsmasq") < 0 || VIR_STRDUP(network_driver->radvdStateDir, LOCALSTATEDIR "/lib/libvirt/radvd") < 0) goto error; } else { configdir = virGetUserConfigDirectory(); rundir = virGetUserRuntimeDirectory(); if (!(configdir && rundir)) goto error; if ((virAsprintf(&network_driver->networkConfigDir, "%s/qemu/networks", configdir) < 0) || (virAsprintf(&network_driver->networkAutostartDir, "%s/qemu/networks/autostart", configdir) < 0) || (virAsprintf(&network_driver->stateDir, "%s/network/lib", rundir) < 0) || (virAsprintf(&network_driver->pidDir, "%s/network/run", rundir) < 0) || (virAsprintf(&network_driver->dnsmasqStateDir, "%s/dnsmasq/lib", rundir) < 0) || (virAsprintf(&network_driver->radvdStateDir, "%s/radvd/lib", rundir) < 0)) { goto error; } } if (virFileMakePath(network_driver->stateDir) < 0) { virReportSystemError(errno, _("cannot create directory %s"), network_driver->stateDir); goto error; } if ((network_driver->lockFD = virPidFileAcquire(network_driver->stateDir, "driver", true, getpid())) < 0) goto error; /* if this fails now, it will be retried later with dnsmasqCapsRefresh() */ network_driver->dnsmasqCaps = dnsmasqCapsNewFromBinary(DNSMASQ); if (!(network_driver->networks = virNetworkObjListNew())) goto error; if (virNetworkObjLoadAllState(network_driver->networks, network_driver->stateDir, network_driver->xmlopt) < 0) goto error; if (virNetworkObjLoadAllConfigs(network_driver->networks, network_driver->networkConfigDir, network_driver->networkAutostartDir, network_driver->xmlopt) < 0) goto error; /* Update the internal status of all allegedly active * networks according to external conditions on the host * (i.e. anything that isn't stored directly in each * network's state file). */ virNetworkObjListForEach(network_driver->networks, networkUpdateState, network_driver); virNetworkObjListPrune(network_driver->networks, VIR_CONNECT_LIST_NETWORKS_INACTIVE | VIR_CONNECT_LIST_NETWORKS_TRANSIENT); networkReloadFirewallRules(network_driver, true); networkRefreshDaemons(network_driver); if (virDriverShouldAutostart(network_driver->stateDir, &autostart) < 0) goto error; if (autostart) { virNetworkObjListForEach(network_driver->networks, networkAutostartConfig, network_driver); } network_driver->networkEventState = virObjectEventStateNew(); #ifdef WITH_FIREWALLD if (!(sysbus = virDBusGetSystemBus())) { VIR_WARN("DBus not available, disabling firewalld support " "in bridge_network_driver: %s", virGetLastErrorMessage()); } else { /* add matches for * NameOwnerChanged on org.freedesktop.DBus for firewalld start/stop * Reloaded on org.fedoraproject.FirewallD1 for firewalld reload */ dbus_bus_add_match(sysbus, "type='signal'" ",interface='"DBUS_INTERFACE_DBUS"'" ",member='NameOwnerChanged'" ",arg0='org.fedoraproject.FirewallD1'", NULL); dbus_bus_add_match(sysbus, "type='signal'" ",interface='org.fedoraproject.FirewallD1'" ",member='Reloaded'", NULL); dbus_connection_add_filter(sysbus, firewalld_dbus_filter_bridge, network_driver, NULL); } #endif ret = VIR_DRV_STATE_INIT_COMPLETE; cleanup: VIR_FREE(configdir); VIR_FREE(rundir); return ret; error: networkStateCleanup(); goto cleanup; } /** * networkStateReload: * * Function to restart the QEMU daemon, it will recheck the configuration * files and update its state and the networking */ static int networkStateReload(void) { if (!network_driver) return 0; virNetworkObjLoadAllState(network_driver->networks, network_driver->stateDir, network_driver->xmlopt); virNetworkObjLoadAllConfigs(network_driver->networks, network_driver->networkConfigDir, network_driver->networkAutostartDir, network_driver->xmlopt); networkReloadFirewallRules(network_driver, false); networkRefreshDaemons(network_driver); virNetworkObjListForEach(network_driver->networks, networkAutostartConfig, network_driver); return 0; } /** * networkStateCleanup: * * Shutdown the QEMU daemon, it will stop all active domains and networks */ static int networkStateCleanup(void) { if (!network_driver) return -1; virObjectUnref(network_driver->networkEventState); virObjectUnref(network_driver->xmlopt); /* free inactive networks */ virObjectUnref(network_driver->networks); if (network_driver->lockFD != -1) virPidFileRelease(network_driver->stateDir, "driver", network_driver->lockFD); VIR_FREE(network_driver->networkConfigDir); VIR_FREE(network_driver->networkAutostartDir); VIR_FREE(network_driver->stateDir); VIR_FREE(network_driver->pidDir); VIR_FREE(network_driver->dnsmasqStateDir); VIR_FREE(network_driver->radvdStateDir); virObjectUnref(network_driver->dnsmasqCaps); virMutexDestroy(&network_driver->lock); VIR_FREE(network_driver); return 0; } static virDrvOpenStatus networkConnectOpen(virConnectPtr conn, virConnectAuthPtr auth G_GNUC_UNUSED, virConfPtr conf G_GNUC_UNUSED, unsigned int flags) { virCheckFlags(VIR_CONNECT_RO, VIR_DRV_OPEN_ERROR); if (network_driver == NULL) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("network state driver is not active")); return VIR_DRV_OPEN_ERROR; } if (!virConnectValidateURIPath(conn->uri->path, "network", network_driver->privileged)) return VIR_DRV_OPEN_ERROR; if (virConnectOpenEnsureACL(conn) < 0) return VIR_DRV_OPEN_ERROR; return VIR_DRV_OPEN_SUCCESS; } static int networkConnectClose(virConnectPtr conn G_GNUC_UNUSED) { return 0; } static int networkConnectIsSecure(virConnectPtr conn G_GNUC_UNUSED) { /* Trivially secure, since always inside the daemon */ return 1; } static int networkConnectIsEncrypted(virConnectPtr conn G_GNUC_UNUSED) { /* Not encrypted, but remote driver takes care of that */ return 0; } static int networkConnectIsAlive(virConnectPtr conn G_GNUC_UNUSED) { return 1; } /* networkKillDaemon: * * kill the specified pid/name, and wait a bit to make sure it's dead. */ static int networkKillDaemon(pid_t pid, const char *daemonName, const char *networkName) { size_t i; int ret = -1; const char *signame = "TERM"; /* send SIGTERM, then wait up to 3 seconds for the process to * disappear, send SIGKILL, then wait for up to another 2 * seconds. If that fails, log a warning and continue, hoping * for the best. */ for (i = 0; i < 25; i++) { int signum = 0; if (i == 0) { signum = SIGTERM; } else if (i == 15) { signum = SIGKILL; signame = "KILL"; } if (kill(pid, signum) < 0) { if (errno == ESRCH) { ret = 0; } else { char ebuf[1024]; VIR_WARN("Failed to terminate %s process %d " "for network '%s' with SIG%s: %s", daemonName, pid, networkName, signame, virStrerror(errno, ebuf, sizeof(ebuf))); } goto cleanup; } /* NB: since networks have no reference count like * domains, there is no safe way to unlock the network * object temporarily, and so we can't follow the * procedure used by the qemu driver of 1) unlock driver * 2) sleep, 3) add ref to object 4) unlock object, 5) * re-lock driver, 6) re-lock object. We may need to add * that functionality eventually, but for now this * function is rarely used and, at worst, leaving the * network driver locked during this loop of sleeps will * have the effect of holding up any other thread trying * to make modifications to a network for up to 5 seconds; * since modifications to networks are much less common * than modifications to domains, this seems a reasonable * tradeoff in exchange for less code disruption. */ g_usleep(20 * 1000); } VIR_WARN("Timed out waiting after SIG%s to %s process %d " "(network '%s')", signame, daemonName, pid, networkName); cleanup: return ret; } /* the following does not build a file, it builds a list * which is later saved into a file */ static int networkBuildDnsmasqDhcpHostsList(dnsmasqContext *dctx, virNetworkIPDefPtr ipdef) { size_t i; bool ipv6 = false; if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) ipv6 = true; for (i = 0; i < ipdef->nhosts; i++) { virNetworkDHCPHostDefPtr host = &(ipdef->hosts[i]); if (VIR_SOCKET_ADDR_VALID(&host->ip)) if (dnsmasqAddDhcpHost(dctx, host->mac, &host->ip, host->name, host->id, ipv6) < 0) return -1; } return 0; } static int networkBuildDnsmasqHostsList(dnsmasqContext *dctx, virNetworkDNSDefPtr dnsdef) { size_t i, j; if (dnsdef) { for (i = 0; i < dnsdef->nhosts; i++) { virNetworkDNSHostDefPtr host = &(dnsdef->hosts[i]); if (VIR_SOCKET_ADDR_VALID(&host->ip)) { for (j = 0; j < host->nnames; j++) if (dnsmasqAddHost(dctx, &host->ip, host->names[j]) < 0) return -1; } } } return 0; } static int networkDnsmasqConfLocalPTRs(virBufferPtr buf, virNetworkDefPtr def) { virNetworkIPDefPtr ip; size_t i; char *ptr = NULL; int rc; for (i = 0; i < def->nips; i++) { ip = def->ips + i; if (ip->localPTR != VIR_TRISTATE_BOOL_YES) continue; if ((rc = virSocketAddrPTRDomain(&ip->address, virNetworkIPDefPrefix(ip), &ptr)) < 0) { if (rc == -2) { int family = VIR_SOCKET_ADDR_FAMILY(&ip->address); virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("PTR domain for %s network with prefix %u " "cannot be automatically created"), (family == AF_INET) ? "IPv4" : "IPv6", virNetworkIPDefPrefix(ip)); } return -1; } virBufferAsprintf(buf, "local=/%s/\n", ptr); VIR_FREE(ptr); } return 0; } int networkDnsmasqConfContents(virNetworkObjPtr obj, const char *pidfile, char **configstr, dnsmasqContext *dctx, dnsmasqCapsPtr caps G_GNUC_UNUSED) { virNetworkDefPtr def = virNetworkObjGetDef(obj); virBuffer configbuf = VIR_BUFFER_INITIALIZER; int r, ret = -1; int nbleases = 0; size_t i; virNetworkDNSDefPtr dns = &def->dns; bool wantDNS = dns->enable != VIR_TRISTATE_BOOL_NO; virNetworkIPDefPtr tmpipdef, ipdef, ipv4def, ipv6def; bool ipv6SLAAC; char *saddr = NULL, *eaddr = NULL; *configstr = NULL; /* * All dnsmasq parameters are put into a configuration file, except the * command line --conf-file=parameter which specifies the location of * configuration file. * * All dnsmasq conf-file parameters must be specified as "foo=bar" * as oppose to "--foo bar" which was acceptable on the command line. */ /* * Needed to ensure dnsmasq uses same algorithm for processing * multiple namedriver entries in /etc/resolv.conf as GLibC. */ /* create dnsmasq config file appropriate for this network */ /* Don't forget to update networkxml2conftest :-) */ virBufferAsprintf(&configbuf, "##WARNING: THIS IS AN AUTO-GENERATED FILE. " "CHANGES TO IT ARE LIKELY TO BE\n" "##OVERWRITTEN AND LOST. Changes to this " "configuration should be made using:\n" "## virsh net-edit %s\n" "## or other application using the libvirt API.\n" "##\n## dnsmasq conf file created by libvirt\n" "strict-order\n", def->name); /* if dns is disabled, set its listening port to 0, which * tells dnsmasq to not listen */ if (!wantDNS) virBufferAddLit(&configbuf, "port=0\n"); if (wantDNS && def->dns.forwarders) { /* addNoResolv should be set to true if there are any entries * that specify an IP address for requests, but no domain * qualifier (implying that all requests otherwise "unclaimed" * should be sent to that address). if it is still false when * we've looked at all entries, it means we still need the * host's resolv.conf for some cases. */ bool addNoResolv = false; for (i = 0; i < def->dns.nfwds; i++) { virNetworkDNSForwarderPtr fwd = &def->dns.forwarders[i]; virBufferAddLit(&configbuf, "server="); if (fwd->domain) virBufferAsprintf(&configbuf, "/%s/", fwd->domain); if (VIR_SOCKET_ADDR_VALID(&fwd->addr)) { char *addr = virSocketAddrFormat(&fwd->addr); if (!addr) goto cleanup; virBufferAsprintf(&configbuf, "%s\n", addr); VIR_FREE(addr); if (!fwd->domain) addNoResolv = true; } else { /* "don't forward requests for this domain" */ virBufferAddLit(&configbuf, "#\n"); } } if (addNoResolv) virBufferAddLit(&configbuf, "no-resolv\n"); } if (def->domain) { if (def->domainLocalOnly == VIR_TRISTATE_BOOL_YES) { virBufferAsprintf(&configbuf, "local=/%s/\n", def->domain); } virBufferAsprintf(&configbuf, "domain=%s\n" "expand-hosts\n", def->domain); } if (wantDNS && networkDnsmasqConfLocalPTRs(&configbuf, def) < 0) goto cleanup; if (wantDNS && def->dns.forwardPlainNames == VIR_TRISTATE_BOOL_NO) { virBufferAddLit(&configbuf, "domain-needed\n"); /* need to specify local=// whether or not a domain is * specified, unless the config says we should forward "plain" * names (i.e. not fully qualified, no '.' characters) */ virBufferAddLit(&configbuf, "local=//\n"); } if (pidfile) virBufferAsprintf(&configbuf, "pid-file=%s\n", pidfile); /* dnsmasq will *always* listen on localhost unless told otherwise */ #ifdef __linux__ virBufferAddLit(&configbuf, "except-interface=lo\n"); #else /* BSD family OSes and Solaris call loopback interface as lo0 */ virBufferAddLit(&configbuf, "except-interface=lo0\n"); #endif if (dnsmasqCapsGet(caps, DNSMASQ_CAPS_BIND_DYNAMIC)) { /* using --bind-dynamic with only --interface (no * --listen-address) prevents dnsmasq from responding to dns * queries that arrive on some interface other than our bridge * interface (in other words, requests originating somewhere * other than one of the virtual guests connected directly to * this network). This was added in response to CVE 2012-3411. */ virBufferAsprintf(&configbuf, "bind-dynamic\n" "interface=%s\n", def->bridge); } else { virBufferAddLit(&configbuf, "bind-interfaces\n"); /* * --interface does not actually work with dnsmasq < 2.47, * due to DAD for ipv6 addresses on the interface. * * virCommandAddArgList(cmd, "--interface", def->bridge, NULL); * * So listen on all defined IPv[46] addresses */ for (i = 0; (tmpipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i)); i++) { char *ipaddr = virSocketAddrFormat(&tmpipdef->address); if (!ipaddr) goto cleanup; /* also part of CVE 2012-3411 - if the host's version of * dnsmasq doesn't have bind-dynamic, only allow listening on * private/local IP addresses (see RFC1918/RFC3484/RFC4193) */ if (!dnsmasqCapsGet(caps, DNSMASQ_CAPS_BINDTODEVICE) && !virSocketAddrIsPrivate(&tmpipdef->address)) { unsigned long version = dnsmasqCapsGetVersion(caps); virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Publicly routable address %s is prohibited. " "The version of dnsmasq on this host (%d.%d) " "doesn't support the bind-dynamic option or " "use SO_BINDTODEVICE on listening sockets, " "one of which is required for safe operation " "on a publicly routable subnet " "(see CVE-2012-3411). You must either " "upgrade dnsmasq, or use a private/local " "subnet range for this network " "(as described in RFC1918/RFC3484/RFC4193)."), ipaddr, (int)version / 1000000, (int)(version % 1000000) / 1000); VIR_FREE(ipaddr); goto cleanup; } virBufferAsprintf(&configbuf, "listen-address=%s\n", ipaddr); VIR_FREE(ipaddr); } } /* If this is an isolated network, set the default route option * (3) to be empty to avoid setting a default route that's * guaranteed to not work, and set no-resolv so that no dns * requests are forwarded on to the dns server listed in the * host's /etc/resolv.conf (since this could be used as a channel * to build a connection to the outside). * IPv6 RA always contains an implicit default route * via the sender's link-local address. The only thing we can do * is set the lifetime of this route to 0, i.e. disable it. */ if (def->forward.type == VIR_NETWORK_FORWARD_NONE) { virBufferAddLit(&configbuf, "dhcp-option=3\n" "no-resolv\n"); if (dnsmasqCapsGet(caps, DNSMASQ_CAPS_RA_PARAM)) { /* interface=* (any), interval=0 (default), lifetime=0 (seconds) */ virBufferAddLit(&configbuf, "ra-param=*,0,0\n"); } } if (wantDNS) { for (i = 0; i < dns->ntxts; i++) { virBufferAsprintf(&configbuf, "txt-record=%s,%s\n", dns->txts[i].name, dns->txts[i].value); } for (i = 0; i < dns->nsrvs; i++) { /* service/protocol are required, and should have been validated * by the parser. */ if (!dns->srvs[i].service) { virReportError(VIR_ERR_INTERNAL_ERROR, _("Missing required 'service' " "attribute in SRV record of network '%s'"), def->name); goto cleanup; } if (!dns->srvs[i].protocol) { virReportError(VIR_ERR_INTERNAL_ERROR, _("Missing required 'service' " "attribute in SRV record of network '%s'"), def->name); goto cleanup; } /* RFC2782 requires that service and protocol be preceded by * an underscore. */ virBufferAsprintf(&configbuf, "srv-host=_%s._%s", dns->srvs[i].service, dns->srvs[i].protocol); /* domain is optional - it defaults to the domain of this network */ if (dns->srvs[i].domain) virBufferAsprintf(&configbuf, ".%s", dns->srvs[i].domain); /* If target is empty or ".", that means "the service is * decidedly not available at this domain" (RFC2782). In that * case, any port, priority, or weight is irrelevant. */ if (dns->srvs[i].target && STRNEQ(dns->srvs[i].target, ".")) { virBufferAsprintf(&configbuf, ",%s", dns->srvs[i].target); /* port, priority, and weight are optional, but are * identified by their position in the line. If an item is * unspecified, but something later in the line *is* * specified, we need to give the default value for the * unspecified item. (According to the dnsmasq manpage, * the default for port is 1). */ if (dns->srvs[i].port || dns->srvs[i].priority || dns->srvs[i].weight) virBufferAsprintf(&configbuf, ",%d", dns->srvs[i].port ? dns->srvs[i].port : 1); if (dns->srvs[i].priority || dns->srvs[i].weight) virBufferAsprintf(&configbuf, ",%d", dns->srvs[i].priority); if (dns->srvs[i].weight) virBufferAsprintf(&configbuf, ",%d", dns->srvs[i].weight); } virBufferAddLit(&configbuf, "\n"); } } /* Find the first dhcp for both IPv4 and IPv6 */ for (i = 0, ipv4def = NULL, ipv6def = NULL, ipv6SLAAC = false; (ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i)); i++) { if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET)) { if (ipdef->nranges || ipdef->nhosts) { if (ipv4def) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("For IPv4, multiple DHCP definitions " "cannot be specified.")); goto cleanup; } else { ipv4def = ipdef; } } } if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) { if (ipdef->nranges || ipdef->nhosts) { if (!DNSMASQ_DHCPv6_SUPPORT(caps)) { unsigned long version = dnsmasqCapsGetVersion(caps); virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("The version of dnsmasq on this host " "(%d.%d) doesn't adequately support " "IPv6 dhcp range or dhcp host " "specification. Version %d.%d or later " "is required."), (int)version / 1000000, (int)(version % 1000000) / 1000, DNSMASQ_DHCPv6_MAJOR_REQD, DNSMASQ_DHCPv6_MINOR_REQD); goto cleanup; } if (ipv6def) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("For IPv6, multiple DHCP definitions " "cannot be specified.")); goto cleanup; } else { ipv6def = ipdef; } } else { ipv6SLAAC = true; } } } if (ipv6def && ipv6SLAAC) { VIR_WARN("For IPv6, when DHCP is specified for one address, then " "state-full Router Advertising will occur. The additional " "IPv6 addresses specified require manually configured guest " "network to work properly since both state-full (DHCP) " "and state-less (SLAAC) addressing are not supported " "on the same network interface."); } ipdef = ipv4def ? ipv4def : ipv6def; while (ipdef) { int prefix; prefix = virNetworkIPDefPrefix(ipdef); if (prefix < 0) { virReportError(VIR_ERR_INTERNAL_ERROR, _("bridge '%s' has an invalid prefix"), def->bridge); goto cleanup; } for (r = 0; r < ipdef->nranges; r++) { int thisRange; if (!(saddr = virSocketAddrFormat(&ipdef->ranges[r].start)) || !(eaddr = virSocketAddrFormat(&ipdef->ranges[r].end))) goto cleanup; if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) { virBufferAsprintf(&configbuf, "dhcp-range=%s,%s,%d\n", saddr, eaddr, prefix); } else { /* IPv4 - dnsmasq requires a netmask rather than prefix */ virSocketAddr netmask; g_autofree char *netmaskStr = NULL; if (virSocketAddrPrefixToNetmask(prefix, &netmask, AF_INET) < 0) { virReportError(VIR_ERR_INTERNAL_ERROR, _("Failed to translate bridge '%s' " "prefix %d to netmask"), def->bridge, prefix); goto cleanup; } if (!(netmaskStr = virSocketAddrFormat(&netmask))) goto cleanup; virBufferAsprintf(&configbuf, "dhcp-range=%s,%s,%s\n", saddr, eaddr, netmaskStr); } VIR_FREE(saddr); VIR_FREE(eaddr); thisRange = virSocketAddrGetRange(&ipdef->ranges[r].start, &ipdef->ranges[r].end, &ipdef->address, virNetworkIPDefPrefix(ipdef)); if (thisRange < 0) goto cleanup; nbleases += thisRange; } /* * For static-only DHCP, i.e. with no range but at least one * host element, we have to add a special --dhcp-range option * to enable the service in dnsmasq. (this is for dhcp-hosts= * support) */ if (!ipdef->nranges && ipdef->nhosts) { char *bridgeaddr = virSocketAddrFormat(&ipdef->address); if (!bridgeaddr) goto cleanup; virBufferAsprintf(&configbuf, "dhcp-range=%s,static", bridgeaddr); if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) virBufferAsprintf(&configbuf, ",%d", prefix); virBufferAddLit(&configbuf, "\n"); VIR_FREE(bridgeaddr); } if (networkBuildDnsmasqDhcpHostsList(dctx, ipdef) < 0) goto cleanup; /* Note: the following is IPv4 only */ if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET)) { if (ipdef->nranges || ipdef->nhosts) { virBufferAddLit(&configbuf, "dhcp-no-override\n"); virBufferAddLit(&configbuf, "dhcp-authoritative\n"); } if (ipdef->tftproot) { virBufferAddLit(&configbuf, "enable-tftp\n"); virBufferAsprintf(&configbuf, "tftp-root=%s\n", ipdef->tftproot); } if (ipdef->bootfile) { if (VIR_SOCKET_ADDR_VALID(&ipdef->bootserver)) { char *bootserver = virSocketAddrFormat(&ipdef->bootserver); if (!bootserver) goto cleanup; virBufferAsprintf(&configbuf, "dhcp-boot=%s%s%s\n", ipdef->bootfile, ",,", bootserver); VIR_FREE(bootserver); } else { virBufferAsprintf(&configbuf, "dhcp-boot=%s\n", ipdef->bootfile); } } } ipdef = (ipdef == ipv6def) ? NULL : ipv6def; } if (nbleases > 0) virBufferAsprintf(&configbuf, "dhcp-lease-max=%d\n", nbleases); /* this is done once per interface */ if (networkBuildDnsmasqHostsList(dctx, dns) < 0) goto cleanup; /* Even if there are currently no static hosts, if we're * listening for DHCP, we should write a 0-length hosts * file to allow for runtime additions. */ if (ipv4def || ipv6def) virBufferAsprintf(&configbuf, "dhcp-hostsfile=%s\n", dctx->hostsfile->path); /* Likewise, always create this file and put it on the * commandline, to allow for runtime additions. */ if (wantDNS) { virBufferAsprintf(&configbuf, "addn-hosts=%s\n", dctx->addnhostsfile->path); } /* Configure DHCP to tell clients about the MTU. */ if (def->mtu > 0) virBufferAsprintf(&configbuf, "dhcp-option=option:mtu,%d\n", def->mtu); /* Are we doing RA instead of radvd? */ if (DNSMASQ_RA_SUPPORT(caps)) { if (ipv6def) { virBufferAddLit(&configbuf, "enable-ra\n"); } else { for (i = 0; (ipdef = virNetworkDefGetIPByIndex(def, AF_INET6, i)); i++) { if (!(ipdef->nranges || ipdef->nhosts)) { char *bridgeaddr = virSocketAddrFormat(&ipdef->address); if (!bridgeaddr) goto cleanup; virBufferAsprintf(&configbuf, "dhcp-range=%s,ra-only\n", bridgeaddr); VIR_FREE(bridgeaddr); } } } } if (def->namespaceData) { networkDnsmasqXmlNsDefPtr dnsmasqxmlns = def->namespaceData; for (i = 0; i < dnsmasqxmlns->noptions; i++) virBufferAsprintf(&configbuf, "%s\n", dnsmasqxmlns->options[i]); } if (!(*configstr = virBufferContentAndReset(&configbuf))) goto cleanup; ret = 0; cleanup: VIR_FREE(saddr); VIR_FREE(eaddr); virBufferFreeAndReset(&configbuf); return ret; } /* build the dnsmasq command line */ static int ATTRIBUTE_NONNULL(3) networkBuildDhcpDaemonCommandLine(virNetworkDriverStatePtr driver, virNetworkObjPtr obj, virCommandPtr *cmdout, char *pidfile, dnsmasqContext *dctx) { virNetworkDefPtr def = virNetworkObjGetDef(obj); dnsmasqCapsPtr dnsmasq_caps = networkGetDnsmasqCaps(driver); virCommandPtr cmd = NULL; int ret = -1; char *configfile = NULL; char *configstr = NULL; char *leaseshelper_path = NULL; virNetworkObjSetDnsmasqPid(obj, -1); if (networkDnsmasqConfContents(obj, pidfile, &configstr, dctx, dnsmasq_caps) < 0) goto cleanup; if (!configstr) goto cleanup; /* construct the filename */ if (!(configfile = networkDnsmasqConfigFileName(driver, def->name))) goto cleanup; /* Write the file */ if (virFileWriteStr(configfile, configstr, 0600) < 0) { virReportSystemError(errno, _("couldn't write dnsmasq config file '%s'"), configfile); goto cleanup; } /* This helper is used to create custom leases file for libvirt */ if (!(leaseshelper_path = virFileFindResource("libvirt_leaseshelper", abs_top_builddir "/src", LIBEXECDIR))) goto cleanup; cmd = virCommandNew(dnsmasqCapsGetBinaryPath(dnsmasq_caps)); virCommandAddArgFormat(cmd, "--conf-file=%s", configfile); /* Libvirt gains full control of leases database */ virCommandAddArgFormat(cmd, "--leasefile-ro"); virCommandAddArgFormat(cmd, "--dhcp-script=%s", leaseshelper_path); virCommandAddEnvPair(cmd, "VIR_BRIDGE_NAME", def->bridge); *cmdout = cmd; ret = 0; cleanup: virObjectUnref(dnsmasq_caps); VIR_FREE(configfile); VIR_FREE(configstr); VIR_FREE(leaseshelper_path); return ret; } static int networkStartDhcpDaemon(virNetworkDriverStatePtr driver, virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); virNetworkIPDefPtr ipdef; size_t i; bool needDnsmasq = false; virCommandPtr cmd = NULL; char *pidfile = NULL; pid_t dnsmasqPid; int ret = -1; dnsmasqContext *dctx = NULL; /* see if there are any IP addresses that need a dhcp server */ i = 0; while ((ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i))) { i++; if (ipdef->nranges || ipdef->nhosts) needDnsmasq = true; } if (i == 0) { /* no IP addresses at all, so we don't need to run */ ret = 0; goto cleanup; } if (!needDnsmasq && def->dns.enable == VIR_TRISTATE_BOOL_NO) { /* no DHCP services needed, and user disabled DNS service */ ret = 0; goto cleanup; } if (virFileMakePath(driver->pidDir) < 0) { virReportSystemError(errno, _("cannot create directory %s"), driver->pidDir); goto cleanup; } if (!(pidfile = virPidFileBuildPath(driver->pidDir, def->name))) goto cleanup; if (virFileMakePath(driver->dnsmasqStateDir) < 0) { virReportSystemError(errno, _("cannot create directory %s"), driver->dnsmasqStateDir); goto cleanup; } dctx = dnsmasqContextNew(def->name, driver->dnsmasqStateDir); if (dctx == NULL) goto cleanup; if (networkDnsmasqCapsRefresh(driver) < 0) goto cleanup; ret = networkBuildDhcpDaemonCommandLine(driver, obj, &cmd, pidfile, dctx); if (ret < 0) goto cleanup; ret = dnsmasqSave(dctx); if (ret < 0) goto cleanup; ret = virCommandRun(cmd, NULL); if (ret < 0) goto cleanup; /* * There really is no race here - when dnsmasq daemonizes, its * leader process stays around until its child has actually * written its pidfile. So by time virCommandRun exits it has * waitpid'd and guaranteed the proess has started and written a * pid */ ret = virPidFileRead(driver->pidDir, def->name, &dnsmasqPid); if (ret < 0) goto cleanup; virNetworkObjSetDnsmasqPid(obj, dnsmasqPid); ret = 0; cleanup: VIR_FREE(pidfile); virCommandFree(cmd); dnsmasqContextFree(dctx); return ret; } /* networkRefreshDhcpDaemon: * Update dnsmasq config files, then send a SIGHUP so that it rereads * them. This only works for the dhcp-hostsfile and the * addn-hosts file. * * Returns 0 on success, -1 on failure. */ static int networkRefreshDhcpDaemon(virNetworkDriverStatePtr driver, virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); int ret = -1; size_t i; pid_t dnsmasqPid; virNetworkIPDefPtr ipdef, ipv4def, ipv6def; dnsmasqContext *dctx = NULL; /* if no IP addresses specified, nothing to do */ if (!virNetworkDefGetIPByIndex(def, AF_UNSPEC, 0)) return 0; /* if there's no running dnsmasq, just start it */ dnsmasqPid = virNetworkObjGetDnsmasqPid(obj); if (dnsmasqPid <= 0 || (kill(dnsmasqPid, 0) < 0)) return networkStartDhcpDaemon(driver, obj); VIR_INFO("Refreshing dnsmasq for network %s", def->bridge); if (!(dctx = dnsmasqContextNew(def->name, driver->dnsmasqStateDir))) { goto cleanup; } /* Look for first IPv4 address that has dhcp defined. * We only support dhcp-host config on one IPv4 subnetwork * and on one IPv6 subnetwork. */ ipv4def = NULL; for (i = 0; (ipdef = virNetworkDefGetIPByIndex(def, AF_INET, i)); i++) { if (!ipv4def && (ipdef->nranges || ipdef->nhosts)) ipv4def = ipdef; } ipv6def = NULL; for (i = 0; (ipdef = virNetworkDefGetIPByIndex(def, AF_INET6, i)); i++) { if (!ipv6def && (ipdef->nranges || ipdef->nhosts)) ipv6def = ipdef; } if (ipv4def && (networkBuildDnsmasqDhcpHostsList(dctx, ipv4def) < 0)) goto cleanup; if (ipv6def && (networkBuildDnsmasqDhcpHostsList(dctx, ipv6def) < 0)) goto cleanup; if (networkBuildDnsmasqHostsList(dctx, &def->dns) < 0) goto cleanup; if ((ret = dnsmasqSave(dctx)) < 0) goto cleanup; dnsmasqPid = virNetworkObjGetDnsmasqPid(obj); ret = kill(dnsmasqPid, SIGHUP); cleanup: dnsmasqContextFree(dctx); return ret; } /* networkRestartDhcpDaemon: * * kill and restart dnsmasq, in order to update any config that is on * the dnsmasq commandline (and any placed in separate config files). * * Returns 0 on success, -1 on failure. */ static int networkRestartDhcpDaemon(virNetworkDriverStatePtr driver, virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); pid_t dnsmasqPid = virNetworkObjGetDnsmasqPid(obj); /* if there is a running dnsmasq, kill it */ if (dnsmasqPid > 0) { networkKillDaemon(dnsmasqPid, "dnsmasq", def->name); virNetworkObjSetDnsmasqPid(obj, -1); } /* now start dnsmasq if it should be started */ return networkStartDhcpDaemon(driver, obj); } static char radvd1[] = " AdvOtherConfigFlag off;\n\n"; static char radvd2[] = " AdvAutonomous off;\n"; static char radvd3[] = " AdvOnLink on;\n" " AdvAutonomous on;\n" " AdvRouterAddr off;\n"; static int networkRadvdConfContents(virNetworkObjPtr obj, char **configstr) { virNetworkDefPtr def = virNetworkObjGetDef(obj); virBuffer configbuf = VIR_BUFFER_INITIALIZER; int ret = -1; size_t i; virNetworkIPDefPtr ipdef; bool v6present = false, dhcp6 = false; *configstr = NULL; /* Check if DHCPv6 is needed */ for (i = 0; (ipdef = virNetworkDefGetIPByIndex(def, AF_INET6, i)); i++) { v6present = true; if (ipdef->nranges || ipdef->nhosts) { dhcp6 = true; break; } } /* If there are no IPv6 addresses, then we are done */ if (!v6present) { ret = 0; goto cleanup; } /* create radvd config file appropriate for this network; * IgnoreIfMissing allows radvd to start even when the bridge is down */ virBufferAsprintf(&configbuf, "interface %s\n" "{\n" " AdvSendAdvert on;\n" " IgnoreIfMissing on;\n" " AdvManagedFlag %s;\n" "%s", def->bridge, dhcp6 ? "on" : "off", dhcp6 ? "\n" : radvd1); /* add a section for each IPv6 address in the config */ for (i = 0; (ipdef = virNetworkDefGetIPByIndex(def, AF_INET6, i)); i++) { int prefix; char *netaddr; prefix = virNetworkIPDefPrefix(ipdef); if (prefix < 0) { virReportError(VIR_ERR_INTERNAL_ERROR, _("bridge '%s' has an invalid prefix"), def->bridge); goto cleanup; } if (!(netaddr = virSocketAddrFormat(&ipdef->address))) goto cleanup; virBufferAsprintf(&configbuf, " prefix %s/%d\n" " {\n%s };\n", netaddr, prefix, dhcp6 ? radvd2 : radvd3); VIR_FREE(netaddr); } virBufferAddLit(&configbuf, "};\n"); if (virBufferCheckError(&configbuf) < 0) goto cleanup; *configstr = virBufferContentAndReset(&configbuf); ret = 0; cleanup: virBufferFreeAndReset(&configbuf); return ret; } /* write file and return its name (which must be freed by caller) */ static int networkRadvdConfWrite(virNetworkDriverStatePtr driver, virNetworkObjPtr obj, char **configFile) { virNetworkDefPtr def = virNetworkObjGetDef(obj); int ret = -1; char *configStr = NULL; char *myConfigFile = NULL; if (!configFile) configFile = &myConfigFile; *configFile = NULL; if (networkRadvdConfContents(obj, &configStr) < 0) goto cleanup; if (!configStr) { ret = 0; goto cleanup; } /* construct the filename */ if (!(*configFile = networkRadvdConfigFileName(driver, def->name))) goto cleanup; /* write the file */ if (virFileWriteStr(*configFile, configStr, 0600) < 0) { virReportSystemError(errno, _("couldn't write radvd config file '%s'"), *configFile); goto cleanup; } ret = 0; cleanup: VIR_FREE(configStr); VIR_FREE(myConfigFile); return ret; } static int networkStartRadvd(virNetworkDriverStatePtr driver, virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); dnsmasqCapsPtr dnsmasq_caps = networkGetDnsmasqCaps(driver); pid_t radvdPid; char *pidfile = NULL; char *radvdpidbase = NULL; char *configfile = NULL; virCommandPtr cmd = NULL; int ret = -1; virNetworkObjSetRadvdPid(obj, -1); /* Is dnsmasq handling RA? */ if (DNSMASQ_RA_SUPPORT(dnsmasq_caps)) { ret = 0; goto cleanup; } if (!virNetworkDefGetIPByIndex(def, AF_INET6, 0)) { /* no IPv6 addresses, so we don't need to run radvd */ ret = 0; goto cleanup; } if (!virFileIsExecutable(RADVD)) { virReportSystemError(errno, _("Cannot find %s - " "Possibly the package isn't installed"), RADVD); goto cleanup; } if (virFileMakePath(driver->pidDir) < 0) { virReportSystemError(errno, _("cannot create directory %s"), driver->pidDir); goto cleanup; } if (virFileMakePath(driver->radvdStateDir) < 0) { virReportSystemError(errno, _("cannot create directory %s"), driver->radvdStateDir); goto cleanup; } /* construct pidfile name */ if (!(radvdpidbase = networkRadvdPidfileBasename(def->name))) goto cleanup; if (!(pidfile = virPidFileBuildPath(driver->pidDir, radvdpidbase))) goto cleanup; if (networkRadvdConfWrite(driver, obj, &configfile) < 0) goto cleanup; /* prevent radvd from daemonizing itself with "--debug 1", and use * a dummy pidfile name - virCommand will create the pidfile we * want to use (this is necessary because radvd's internal * daemonization and pidfile creation causes a race, and the * virPidFileRead() below will fail if we use them). * Unfortunately, it isn't possible to tell radvd to not create * its own pidfile, so we just let it do so, with a slightly * different name. Unused, but harmless. */ cmd = virCommandNewArgList(RADVD, "--debug", "1", "--config", configfile, "--pidfile", NULL); virCommandAddArgFormat(cmd, "%s-bin", pidfile); virCommandSetPidFile(cmd, pidfile); virCommandDaemonize(cmd); if (virCommandRun(cmd, NULL) < 0) goto cleanup; if (virPidFileRead(driver->pidDir, radvdpidbase, &radvdPid) < 0) goto cleanup; virNetworkObjSetRadvdPid(obj, radvdPid); ret = 0; cleanup: virObjectUnref(dnsmasq_caps); virCommandFree(cmd); VIR_FREE(configfile); VIR_FREE(radvdpidbase); VIR_FREE(pidfile); return ret; } static int networkRefreshRadvd(virNetworkDriverStatePtr driver, virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); dnsmasqCapsPtr dnsmasq_caps = networkGetDnsmasqCaps(driver); char *radvdpidbase; pid_t radvdPid; /* Is dnsmasq handling RA? */ if (DNSMASQ_RA_SUPPORT(dnsmasq_caps)) { virObjectUnref(dnsmasq_caps); radvdPid = virNetworkObjGetRadvdPid(obj); if (radvdPid <= 0) return 0; /* radvd should not be running but in case it is */ if ((networkKillDaemon(radvdPid, "radvd", def->name) >= 0) && ((radvdpidbase = networkRadvdPidfileBasename(def->name)) != NULL)) { virPidFileDelete(driver->pidDir, radvdpidbase); VIR_FREE(radvdpidbase); } virNetworkObjSetRadvdPid(obj, -1); return 0; } virObjectUnref(dnsmasq_caps); /* if there's no running radvd, just start it */ radvdPid = virNetworkObjGetRadvdPid(obj); if (radvdPid <= 0 || (kill(radvdPid, 0) < 0)) return networkStartRadvd(driver, obj); if (!virNetworkDefGetIPByIndex(def, AF_INET6, 0)) { /* no IPv6 addresses, so we don't need to run radvd */ return 0; } if (networkRadvdConfWrite(driver, obj, NULL) < 0) return -1; return kill(radvdPid, SIGHUP); } #if 0 /* currently unused, so it causes a build error unless we #if it out */ static int networkRestartRadvd(virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); char *radvdpidbase; pid_t radvdPid = virNeworkObjGetRadvdPid(obj); /* if there is a running radvd, kill it */ if (radvdPid > 0) { /* essentially ignore errors from the following two functions, * since there's really no better recovery to be done than to * just push ahead (and that may be exactly what's needed). */ if ((networkKillDaemon(radvdPid, "radvd", def->name) >= 0) && ((radvdpidbase = networkRadvdPidfileBasename(def->name)) != NULL)) { virPidFileDelete(driver->pidDir, radvdpidbase); VIR_FREE(radvdpidbase); } virNetworkObjSetRadvdPid(obj, -1); } /* now start radvd if it should be started */ return networkStartRadvd(obj); } #endif /* #if 0 */ static int networkRefreshDaemonsHelper(virNetworkObjPtr obj, void *opaque) { virNetworkDefPtr def; virNetworkDriverStatePtr driver = opaque; virObjectLock(obj); def = virNetworkObjGetDef(obj); if (virNetworkObjIsActive(obj)) { switch ((virNetworkForwardType) def->forward.type) { case VIR_NETWORK_FORWARD_NONE: case VIR_NETWORK_FORWARD_NAT: case VIR_NETWORK_FORWARD_ROUTE: case VIR_NETWORK_FORWARD_OPEN: /* Only the three L3 network types that are configured by * libvirt will have a dnsmasq or radvd daemon associated * with them. Here we send a SIGHUP to an existing * dnsmasq and/or radvd, or restart them if they've * disappeared. */ networkRefreshDhcpDaemon(driver, obj); networkRefreshRadvd(driver, obj); break; case VIR_NETWORK_FORWARD_BRIDGE: case VIR_NETWORK_FORWARD_PRIVATE: case VIR_NETWORK_FORWARD_VEPA: case VIR_NETWORK_FORWARD_PASSTHROUGH: case VIR_NETWORK_FORWARD_HOSTDEV: break; case VIR_NETWORK_FORWARD_LAST: default: virReportEnumRangeError(virNetworkForwardType, def->forward.type); goto cleanup; } } cleanup: virObjectUnlock(obj); return 0; } /* SIGHUP/restart any dnsmasq or radvd daemons. * This should be called when libvirtd is restarted. */ static void networkRefreshDaemons(virNetworkDriverStatePtr driver) { VIR_INFO("Refreshing network daemons"); virNetworkObjListForEach(driver->networks, networkRefreshDaemonsHelper, driver); } static int networkReloadFirewallRulesHelper(virNetworkObjPtr obj, void *opaque G_GNUC_UNUSED) { virNetworkDefPtr def; virObjectLock(obj); def = virNetworkObjGetDef(obj); if (virNetworkObjIsActive(obj)) { switch ((virNetworkForwardType) def->forward.type) { case VIR_NETWORK_FORWARD_NONE: case VIR_NETWORK_FORWARD_NAT: case VIR_NETWORK_FORWARD_ROUTE: /* Only three of the L3 network types that are configured by * libvirt need to have iptables rules reloaded. The 4th L3 * network type, forward='open', doesn't need this because it * has no iptables rules. */ networkRemoveFirewallRules(def); ignore_value(networkAddFirewallRules(def)); break; case VIR_NETWORK_FORWARD_OPEN: case VIR_NETWORK_FORWARD_BRIDGE: case VIR_NETWORK_FORWARD_PRIVATE: case VIR_NETWORK_FORWARD_VEPA: case VIR_NETWORK_FORWARD_PASSTHROUGH: case VIR_NETWORK_FORWARD_HOSTDEV: break; case VIR_NETWORK_FORWARD_LAST: default: virReportEnumRangeError(virNetworkForwardType, def->forward.type); goto cleanup; } } cleanup: virObjectUnlock(obj); return 0; } static void networkReloadFirewallRules(virNetworkDriverStatePtr driver, bool startup) { VIR_INFO("Reloading iptables rules"); /* Ideally we'd not even register the driver when unprivilegd * but until we untangle the virt driver that's not viable */ if (!driver->privileged) return; networkPreReloadFirewallRules(driver, startup); virNetworkObjListForEach(driver->networks, networkReloadFirewallRulesHelper, NULL); networkPostReloadFirewallRules(startup); } /* Enable IP Forwarding. Return 0 for success, -1 for failure. */ static int networkEnableIPForwarding(bool enableIPv4, bool enableIPv6) { int ret = 0; #ifdef HAVE_SYSCTLBYNAME int enabled = 1; if (enableIPv4) ret = sysctlbyname("net.inet.ip.forwarding", NULL, 0, &enabled, sizeof(enabled)); if (enableIPv6 && ret == 0) ret = sysctlbyname("net.inet6.ip6.forwarding", NULL, 0, &enabled, sizeof(enabled)); #else if (enableIPv4) ret = virFileWriteStr(SYSCTL_PATH "/net/ipv4/ip_forward", "1\n", 0); if (enableIPv6 && ret == 0) ret = virFileWriteStr(SYSCTL_PATH "/net/ipv6/conf/all/forwarding", "1\n", 0); #endif return ret; } static int networkSetIPv6Sysctls(virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); char *field = NULL; int ret = -1; bool enableIPv6 = !!virNetworkDefGetIPByIndex(def, AF_INET6, 0); /* set disable_ipv6 if there are no ipv6 addresses defined for the * network. But also unset it if there *are* ipv6 addresses, as we * can't be sure of its default value. */ if (virAsprintf(&field, SYSCTL_PATH "/net/ipv6/conf/%s/disable_ipv6", def->bridge) < 0) goto cleanup; if (access(field, W_OK) < 0 && errno == ENOENT) { if (!enableIPv6) VIR_DEBUG("ipv6 appears to already be disabled on %s", def->bridge); ret = 0; goto cleanup; } if (virFileWriteStr(field, enableIPv6 ? "0" : "1", 0) < 0) { virReportSystemError(errno, _("cannot write to %s to enable/disable IPv6 " "on bridge %s"), field, def->bridge); goto cleanup; } VIR_FREE(field); /* The rest of the ipv6 sysctl tunables should always be set the * same, whether or not we're using ipv6 on this bridge. */ /* Prevent guests from hijacking the host network by sending out * their own router advertisements. */ if (virAsprintf(&field, SYSCTL_PATH "/net/ipv6/conf/%s/accept_ra", def->bridge) < 0) goto cleanup; if (virFileWriteStr(field, "0", 0) < 0) { virReportSystemError(errno, _("cannot disable %s"), field); goto cleanup; } VIR_FREE(field); /* All interfaces used as a gateway (which is what this is, by * definition), must always have autoconf=0. */ if (virAsprintf(&field, SYSCTL_PATH "/net/ipv6/conf/%s/autoconf", def->bridge) < 0) goto cleanup; if (virFileWriteStr(field, "0", 0) < 0) { virReportSystemError(errno, _("cannot disable %s"), field); goto cleanup; } ret = 0; cleanup: VIR_FREE(field); return ret; } /* add an IP address to a bridge */ static int networkAddAddrToBridge(virNetworkObjPtr obj, virNetworkIPDefPtr ipdef) { virNetworkDefPtr def = virNetworkObjGetDef(obj); int prefix = virNetworkIPDefPrefix(ipdef); if (prefix < 0) { virReportError(VIR_ERR_INTERNAL_ERROR, _("bridge '%s' has an invalid netmask or IP address"), def->bridge); return -1; } if (virNetDevIPAddrAdd(def->bridge, &ipdef->address, NULL, prefix) < 0) return -1; return 0; } static int networkStartHandleMACTableManagerMode(virNetworkObjPtr obj, const char *macTapIfName) { virNetworkDefPtr def = virNetworkObjGetDef(obj); const char *brname = def->bridge; if (brname && def->macTableManager == VIR_NETWORK_BRIDGE_MAC_TABLE_MANAGER_LIBVIRT) { if (virNetDevBridgeSetVlanFiltering(brname, true) < 0) return -1; if (macTapIfName) { if (virNetDevBridgePortSetLearning(brname, macTapIfName, false) < 0) return -1; if (virNetDevBridgePortSetUnicastFlood(brname, macTapIfName, false) < 0) return -1; } } return 0; } /* add an IP (static) route to a bridge */ static int networkAddRouteToBridge(virNetworkObjPtr obj, virNetDevIPRoutePtr routedef) { virNetworkDefPtr def = virNetworkObjGetDef(obj); int prefix = virNetDevIPRouteGetPrefix(routedef); unsigned int metric = virNetDevIPRouteGetMetric(routedef); virSocketAddrPtr addr = virNetDevIPRouteGetAddress(routedef); virSocketAddrPtr gateway = virNetDevIPRouteGetGateway(routedef); if (prefix < 0) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' has an invalid netmask " "or IP address in route definition"), def->name); return -1; } if (virNetDevIPRouteAdd(def->bridge, addr, prefix, gateway, metric) < 0) return -1; return 0; } static int networkWaitDadFinish(virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); virNetworkIPDefPtr ipdef; virSocketAddrPtr *addrs = NULL, addr = NULL; size_t naddrs = 0; int ret = -1; VIR_DEBUG("Begin waiting for IPv6 DAD on network %s", def->name); while ((ipdef = virNetworkDefGetIPByIndex(def, AF_INET6, naddrs))) { addr = &ipdef->address; if (VIR_APPEND_ELEMENT_COPY(addrs, naddrs, addr) < 0) goto cleanup; } ret = (naddrs == 0) ? 0 : virNetDevIPWaitDadFinish(addrs, naddrs); cleanup: VIR_FREE(addrs); VIR_DEBUG("Finished waiting for IPv6 DAD on network %s with status %d", def->name, ret); return ret; } static int networkStartNetworkVirtual(virNetworkDriverStatePtr driver, virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); size_t i; bool v4present = false, v6present = false; virErrorPtr save_err = NULL; virNetworkIPDefPtr ipdef; virNetDevIPRoutePtr routedef; char *macTapIfName = NULL; virMacMapPtr macmap; char *macMapFile = NULL; int tapfd = -1; bool dnsmasqStarted = false; bool devOnline = false; bool firewalRulesAdded = false; /* Check to see if any network IP collides with an existing route */ if (networkCheckRouteCollision(def) < 0) return -1; /* Create and configure the bridge device */ if (!def->bridge) { /* bridge name can only be empty if the config files were * edited directly. Otherwise networkValidate() (called after * parsing the XML from networkCreateXML() and * networkDefine()) guarantees we will have a valid bridge * name before this point. Since hand editing of the config * files is explicitly prohibited we can, with clear * conscience, log an error and fail at this point. */ virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' has no bridge name defined"), def->name); return -1; } if (virNetDevBridgeCreate(def->bridge) < 0) return -1; if (def->mac_specified) { /* To set a mac for the bridge, we need to define a dummy tap * device, set its mac, then attach it to the bridge. As long * as its mac address is lower than any other interface that * gets attached, the bridge will always maintain this mac * address. */ macTapIfName = networkBridgeDummyNicName(def->bridge); if (!macTapIfName) goto error; /* Keep tun fd open and interface up to allow for IPv6 DAD to happen */ if (virNetDevTapCreateInBridgePort(def->bridge, &macTapIfName, &def->mac, NULL, NULL, &tapfd, 1, NULL, NULL, NULL, def->mtu, NULL, VIR_NETDEV_TAP_CREATE_USE_MAC_FOR_BRIDGE | VIR_NETDEV_TAP_CREATE_IFUP | VIR_NETDEV_TAP_CREATE_PERSIST) < 0) { VIR_FREE(macTapIfName); goto error; } } if (!(macMapFile = virMacMapFileName(driver->dnsmasqStateDir, def->bridge)) || !(macmap = virMacMapNew(macMapFile))) goto error; virNetworkObjSetMacMap(obj, macmap); macmap = NULL; /* Set bridge options */ /* delay is configured in seconds, but virNetDevBridgeSetSTPDelay * expects milliseconds */ if (virNetDevBridgeSetSTPDelay(def->bridge, def->delay * 1000) < 0) goto error; if (virNetDevBridgeSetSTP(def->bridge, def->stp ? true : false) < 0) goto error; /* Disable IPv6 on the bridge if there are no IPv6 addresses * defined, and set other IPv6 sysctl tunables appropriately. */ if (networkSetIPv6Sysctls(obj) < 0) goto error; /* Add "once per network" rules */ if (def->forward.type != VIR_NETWORK_FORWARD_OPEN && networkAddFirewallRules(def) < 0) goto error; firewalRulesAdded = true; for (i = 0; (ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i)); i++) { if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET)) v4present = true; if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) v6present = true; /* Add the IP address/netmask to the bridge */ if (networkAddAddrToBridge(obj, ipdef) < 0) goto error; } if (networkStartHandleMACTableManagerMode(obj, macTapIfName) < 0) goto error; /* Bring up the bridge interface */ if (virNetDevSetOnline(def->bridge, 1) < 0) goto error; devOnline = true; for (i = 0; i < def->nroutes; i++) { virSocketAddrPtr gateway = NULL; routedef = def->routes[i]; gateway = virNetDevIPRouteGetGateway(routedef); /* Add the IP route to the bridge */ /* ignore errors, error msg will be generated */ /* but libvirt will not know and net-destroy will work. */ if (VIR_SOCKET_ADDR_VALID(gateway)) { if (networkAddRouteToBridge(obj, routedef) < 0) { /* an error occurred adding the static route */ continue; /* for now, do nothing */ } } } /* If forward.type != NONE, turn on global IP forwarding */ if (def->forward.type != VIR_NETWORK_FORWARD_NONE) { if (v6present && !virNetDevIPCheckIPv6Forwarding()) goto error; /* Precise error message already provided */ if (networkEnableIPForwarding(v4present, v6present) < 0) { virReportSystemError(errno, "%s", _("failed to enable IP forwarding")); goto error; } } /* start dnsmasq if there are any IP addresses (v4 or v6) */ if ((v4present || v6present) && networkStartDhcpDaemon(driver, obj) < 0) goto error; dnsmasqStarted = true; /* start radvd if there are any ipv6 addresses */ if (v6present && networkStartRadvd(driver, obj) < 0) goto error; /* dnsmasq does not wait for DAD to complete before daemonizing, * so we need to wait for it ourselves. */ if (v6present && networkWaitDadFinish(obj) < 0) goto error; /* DAD has finished, dnsmasq is now bound to the * bridge's IPv6 address, so we can set the dummy tun down. */ if (tapfd >= 0) { if (virNetDevSetOnline(macTapIfName, false) < 0) goto error; VIR_FORCE_CLOSE(tapfd); } if (virNetDevBandwidthSet(def->bridge, def->bandwidth, true, true) < 0) goto error; VIR_FREE(macTapIfName); VIR_FREE(macMapFile); return 0; error: virErrorPreserveLast(&save_err); if (def->bandwidth) virNetDevBandwidthClear(def->bridge); if (dnsmasqStarted) { pid_t dnsmasqPid = virNetworkObjGetDnsmasqPid(obj); kill(dnsmasqPid, SIGTERM); virNetworkObjSetDnsmasqPid(obj, -1); } if (devOnline) ignore_value(virNetDevSetOnline(def->bridge, 0)); if (firewalRulesAdded && def->forward.type != VIR_NETWORK_FORWARD_OPEN) networkRemoveFirewallRules(def); if (macTapIfName) { VIR_FORCE_CLOSE(tapfd); ignore_value(virNetDevTapDelete(macTapIfName, NULL)); VIR_FREE(macTapIfName); } virNetworkObjUnrefMacMap(obj); VIR_FREE(macMapFile); ignore_value(virNetDevBridgeDelete(def->bridge)); virErrorRestore(&save_err); /* coverity[leaked_handle] - 'tapfd' is not leaked */ return -1; } static int networkShutdownNetworkVirtual(virNetworkDriverStatePtr driver, virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); pid_t radvdPid; pid_t dnsmasqPid; if (def->bandwidth) virNetDevBandwidthClear(def->bridge); virNetworkObjUnrefMacMap(obj); radvdPid = virNetworkObjGetRadvdPid(obj); if (radvdPid > 0) { char *radvdpidbase; kill(radvdPid, SIGTERM); /* attempt to delete the pidfile we created */ if ((radvdpidbase = networkRadvdPidfileBasename(def->name))) { virPidFileDelete(driver->pidDir, radvdpidbase); VIR_FREE(radvdpidbase); } } dnsmasqPid = virNetworkObjGetDnsmasqPid(obj); if (dnsmasqPid > 0) kill(dnsmasqPid, SIGTERM); if (def->mac_specified) { char *macTapIfName = networkBridgeDummyNicName(def->bridge); if (macTapIfName) { ignore_value(virNetDevTapDelete(macTapIfName, NULL)); VIR_FREE(macTapIfName); } } ignore_value(virNetDevSetOnline(def->bridge, 0)); if (def->forward.type != VIR_NETWORK_FORWARD_OPEN) networkRemoveFirewallRules(def); ignore_value(virNetDevBridgeDelete(def->bridge)); /* See if its still alive and really really kill it */ dnsmasqPid = virNetworkObjGetDnsmasqPid(obj); if (dnsmasqPid > 0 && (kill(dnsmasqPid, 0) == 0)) kill(dnsmasqPid, SIGKILL); virNetworkObjSetDnsmasqPid(obj, -1); radvdPid = virNetworkObjGetRadvdPid(obj); if (radvdPid > 0 && (kill(radvdPid, 0) == 0)) kill(radvdPid, SIGKILL); virNetworkObjSetRadvdPid(obj, -1); return 0; } static int networkStartNetworkBridge(virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); /* put anything here that needs to be done each time a network of * type BRIDGE, is started. On failure, undo anything you've done, * and return -1. On success return 0. */ if (virNetDevBandwidthSet(def->bridge, def->bandwidth, true, true) < 0) goto error; if (networkStartHandleMACTableManagerMode(obj, NULL) < 0) goto error; return 0; error: if (def->bandwidth) virNetDevBandwidthClear(def->bridge); return -1; } static int networkShutdownNetworkBridge(virNetworkObjPtr obj G_GNUC_UNUSED) { virNetworkDefPtr def = virNetworkObjGetDef(obj); /* put anything here that needs to be done each time a network of * type BRIDGE is shutdown. On failure, undo anything you've done, * and return -1. On success return 0. */ if (def->bandwidth) virNetDevBandwidthClear(def->bridge); return 0; } /* networkCreateInterfacePool: * @netdef: the original NetDef from the network * * Creates an implicit interface pool of VF's when a PF dev is given */ static int networkCreateInterfacePool(virNetworkDefPtr netdef) { size_t numVirtFns = 0; unsigned int maxVirtFns = 0; char **vfNames = NULL; virPCIDeviceAddressPtr *virtFns; int ret = -1; size_t i; if (netdef->forward.npfs == 0 || netdef->forward.nifs > 0) return 0; if ((virNetDevGetVirtualFunctions(netdef->forward.pfs->dev, &vfNames, &virtFns, &numVirtFns, &maxVirtFns)) < 0) { virReportError(VIR_ERR_INTERNAL_ERROR, _("Could not get Virtual functions on %s"), netdef->forward.pfs->dev); goto cleanup; } if (VIR_ALLOC_N(netdef->forward.ifs, numVirtFns) < 0) goto cleanup; for (i = 0; i < numVirtFns; i++) { virPCIDeviceAddressPtr thisVirtFn = virtFns[i]; const char *thisName = vfNames[i]; virNetworkForwardIfDefPtr thisIf = &netdef->forward.ifs[netdef->forward.nifs]; switch ((virNetworkForwardType) netdef->forward.type) { case VIR_NETWORK_FORWARD_BRIDGE: case VIR_NETWORK_FORWARD_PRIVATE: case VIR_NETWORK_FORWARD_VEPA: case VIR_NETWORK_FORWARD_PASSTHROUGH: if (thisName) { if (VIR_STRDUP(thisIf->device.dev, thisName) < 0) goto cleanup; thisIf->type = VIR_NETWORK_FORWARD_HOSTDEV_DEVICE_NETDEV; netdef->forward.nifs++; } else { VIR_WARN("VF %zu of SRIOV PF %s couldn't be added to the " "interface pool because it isn't bound " "to a network driver - possibly in use elsewhere", i, netdef->forward.pfs->dev); } break; case VIR_NETWORK_FORWARD_HOSTDEV: /* VF's are always PCI devices */ thisIf->type = VIR_NETWORK_FORWARD_HOSTDEV_DEVICE_PCI; thisIf->device.pci.domain = thisVirtFn->domain; thisIf->device.pci.bus = thisVirtFn->bus; thisIf->device.pci.slot = thisVirtFn->slot; thisIf->device.pci.function = thisVirtFn->function; netdef->forward.nifs++; break; case VIR_NETWORK_FORWARD_NONE: case VIR_NETWORK_FORWARD_NAT: case VIR_NETWORK_FORWARD_ROUTE: case VIR_NETWORK_FORWARD_OPEN: /* by definition these will never be encountered here */ break; case VIR_NETWORK_FORWARD_LAST: default: virReportEnumRangeError(virNetworkForwardType, netdef->forward.type); goto cleanup; } } if (netdef->forward.nifs == 0) { /* If we don't get at least one interface in the pool, declare * failure */ virReportError(VIR_ERR_INTERNAL_ERROR, _("No usable Vf's present on SRIOV PF %s"), netdef->forward.pfs->dev); goto cleanup; } ret = 0; cleanup: if (ret < 0) { /* free all the entries made before error */ for (i = 0; i < netdef->forward.nifs; i++) { if (netdef->forward.ifs[i].type == VIR_NETWORK_FORWARD_HOSTDEV_DEVICE_NETDEV) VIR_FREE(netdef->forward.ifs[i].device.dev); } netdef->forward.nifs = 0; } if (netdef->forward.nifs == 0) VIR_FREE(netdef->forward.ifs); for (i = 0; i < numVirtFns; i++) { VIR_FREE(vfNames[i]); VIR_FREE(virtFns[i]); } VIR_FREE(vfNames); VIR_FREE(virtFns); return ret; } static int networkStartNetworkExternal(virNetworkObjPtr obj) { /* put anything here that needs to be done each time a network of * type BRIDGE, PRIVATE, VEPA, HOSTDEV or PASSTHROUGH is started. On * failure, undo anything you've done, and return -1. On success * return 0. */ return networkCreateInterfacePool(virNetworkObjGetDef(obj)); } static int networkShutdownNetworkExternal(virNetworkObjPtr obj G_GNUC_UNUSED) { /* put anything here that needs to be done each time a network of * type BRIDGE, PRIVATE, VEPA, HOSTDEV or PASSTHROUGH is shutdown. On * failure, undo anything you've done, and return -1. On success * return 0. */ return 0; } static int networkStartNetwork(virNetworkDriverStatePtr driver, virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); int ret = -1; VIR_DEBUG("driver=%p, network=%p", driver, obj); if (virNetworkObjIsActive(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, "%s", _("network is already active")); return ret; } VIR_DEBUG("Beginning network startup process"); virNetworkObjDeleteAllPorts(obj, driver->stateDir); VIR_DEBUG("Setting current network def as transient"); if (virNetworkObjSetDefTransient(obj, true, network_driver->xmlopt) < 0) goto cleanup; /* Run an early hook to set-up missing devices. * If the script raised an error abort the launch. */ if (networkRunHook(obj, NULL, VIR_HOOK_NETWORK_OP_START, VIR_HOOK_SUBOP_BEGIN) < 0) goto cleanup; switch ((virNetworkForwardType) def->forward.type) { case VIR_NETWORK_FORWARD_NONE: case VIR_NETWORK_FORWARD_NAT: case VIR_NETWORK_FORWARD_ROUTE: case VIR_NETWORK_FORWARD_OPEN: if (networkStartNetworkVirtual(driver, obj) < 0) goto cleanup; break; case VIR_NETWORK_FORWARD_BRIDGE: if (def->bridge) { if (networkStartNetworkBridge(obj) < 0) goto cleanup; break; } /* intentionally fall through to the macvtap/direct case for * VIR_NETWORK_FORWARD_BRIDGE with no bridge device defined * (since that is macvtap bridge mode). */ G_GNUC_FALLTHROUGH; case VIR_NETWORK_FORWARD_PRIVATE: case VIR_NETWORK_FORWARD_VEPA: case VIR_NETWORK_FORWARD_PASSTHROUGH: case VIR_NETWORK_FORWARD_HOSTDEV: if (networkStartNetworkExternal(obj) < 0) goto cleanup; break; case VIR_NETWORK_FORWARD_LAST: default: virReportEnumRangeError(virNetworkForwardType, def->forward.type); goto cleanup; } virNetworkObjSetFloorSum(obj, 0); /* finally we can call the 'started' hook script if any */ if (networkRunHook(obj, NULL, VIR_HOOK_NETWORK_OP_STARTED, VIR_HOOK_SUBOP_BEGIN) < 0) goto cleanup; /* Persist the live configuration now that anything autogenerated * is setup. */ VIR_DEBUG("Writing network status to disk"); if (virNetworkObjSaveStatus(driver->stateDir, obj, network_driver->xmlopt) < 0) goto cleanup; virNetworkObjSetActive(obj, true); VIR_INFO("Network '%s' started up", def->name); ret = 0; cleanup: if (ret < 0) { virErrorPtr save_err; virErrorPreserveLast(&save_err); virNetworkObjUnsetDefTransient(obj); networkShutdownNetwork(driver, obj); virErrorRestore(&save_err); } return ret; } static int networkShutdownNetwork(virNetworkDriverStatePtr driver, virNetworkObjPtr obj) { virNetworkDefPtr def = virNetworkObjGetDef(obj); int ret = 0; char *stateFile; VIR_INFO("Shutting down network '%s'", def->name); if (!virNetworkObjIsActive(obj)) return 0; stateFile = virNetworkConfigFile(driver->stateDir, def->name); if (!stateFile) return -1; unlink(stateFile); VIR_FREE(stateFile); switch ((virNetworkForwardType) def->forward.type) { case VIR_NETWORK_FORWARD_NONE: case VIR_NETWORK_FORWARD_NAT: case VIR_NETWORK_FORWARD_ROUTE: case VIR_NETWORK_FORWARD_OPEN: ret = networkShutdownNetworkVirtual(driver, obj); break; case VIR_NETWORK_FORWARD_BRIDGE: if (def->bridge) { ret = networkShutdownNetworkBridge(obj); break; } /* intentionally fall through to the macvtap/direct case for * VIR_NETWORK_FORWARD_BRIDGE with no bridge device defined * (since that is macvtap bridge mode). */ G_GNUC_FALLTHROUGH; case VIR_NETWORK_FORWARD_PRIVATE: case VIR_NETWORK_FORWARD_VEPA: case VIR_NETWORK_FORWARD_PASSTHROUGH: case VIR_NETWORK_FORWARD_HOSTDEV: ret = networkShutdownNetworkExternal(obj); break; case VIR_NETWORK_FORWARD_LAST: default: virReportEnumRangeError(virNetworkForwardType, def->forward.type); return -1; } /* now that we know it's stopped call the hook if present */ networkRunHook(obj, NULL, VIR_HOOK_NETWORK_OP_STOPPED, VIR_HOOK_SUBOP_END); virNetworkObjSetActive(obj, false); virNetworkObjUnsetDefTransient(obj); return ret; } static virNetworkPtr networkLookupByUUID(virConnectPtr conn, const unsigned char *uuid) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkObjPtr obj; virNetworkDefPtr def; virNetworkPtr net = NULL; obj = virNetworkObjFindByUUID(driver->networks, uuid); if (!obj) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(uuid, uuidstr); virReportError(VIR_ERR_NO_NETWORK, _("no network with matching uuid '%s'"), uuidstr); goto cleanup; } def = virNetworkObjGetDef(obj); if (virNetworkLookupByUUIDEnsureACL(conn, def) < 0) goto cleanup; net = virGetNetwork(conn, def->name, def->uuid); cleanup: virNetworkObjEndAPI(&obj); return net; } static virNetworkPtr networkLookupByName(virConnectPtr conn, const char *name) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkObjPtr obj; virNetworkDefPtr def; virNetworkPtr net = NULL; obj = virNetworkObjFindByName(driver->networks, name); if (!obj) { virReportError(VIR_ERR_NO_NETWORK, _("no network with matching name '%s'"), name); goto cleanup; } def = virNetworkObjGetDef(obj); if (virNetworkLookupByNameEnsureACL(conn, def) < 0) goto cleanup; net = virGetNetwork(conn, def->name, def->uuid); cleanup: virNetworkObjEndAPI(&obj); return net; } static int networkConnectNumOfNetworks(virConnectPtr conn) { virNetworkDriverStatePtr driver = networkGetDriver(); int nactive; if (virConnectNumOfNetworksEnsureACL(conn) < 0) return -1; nactive = virNetworkObjListNumOfNetworks(driver->networks, true, virConnectNumOfNetworksCheckACL, conn); return nactive; } static int networkConnectListNetworks(virConnectPtr conn, char **const names, int maxnames) { virNetworkDriverStatePtr driver = networkGetDriver(); int got = 0; if (virConnectListNetworksEnsureACL(conn) < 0) return -1; got = virNetworkObjListGetNames(driver->networks, true, names, maxnames, virConnectListNetworksCheckACL, conn); return got; } static int networkConnectNumOfDefinedNetworks(virConnectPtr conn) { virNetworkDriverStatePtr driver = networkGetDriver(); int ninactive = 0; if (virConnectNumOfDefinedNetworksEnsureACL(conn) < 0) return -1; ninactive = virNetworkObjListNumOfNetworks(driver->networks, false, virConnectNumOfDefinedNetworksCheckACL, conn); return ninactive; } static int networkConnectListDefinedNetworks(virConnectPtr conn, char **const names, int maxnames) { virNetworkDriverStatePtr driver = networkGetDriver(); int got = 0; if (virConnectListDefinedNetworksEnsureACL(conn) < 0) return -1; got = virNetworkObjListGetNames(driver->networks, false, names, maxnames, virConnectListDefinedNetworksCheckACL, conn); return got; } static int networkConnectListAllNetworks(virConnectPtr conn, virNetworkPtr **nets, unsigned int flags) { virNetworkDriverStatePtr driver = networkGetDriver(); int ret = -1; virCheckFlags(VIR_CONNECT_LIST_NETWORKS_FILTERS_ALL, -1); if (virConnectListAllNetworksEnsureACL(conn) < 0) goto cleanup; ret = virNetworkObjListExport(conn, driver->networks, nets, virConnectListAllNetworksCheckACL, flags); cleanup: return ret; } static int networkConnectNetworkEventRegisterAny(virConnectPtr conn, virNetworkPtr net, int eventID, virConnectNetworkEventGenericCallback callback, void *opaque, virFreeCallback freecb) { virNetworkDriverStatePtr driver = networkGetDriver(); int ret = -1; if (virConnectNetworkEventRegisterAnyEnsureACL(conn) < 0) goto cleanup; if (virNetworkEventStateRegisterID(conn, driver->networkEventState, net, eventID, callback, opaque, freecb, &ret) < 0) ret = -1; cleanup: return ret; } static int networkConnectNetworkEventDeregisterAny(virConnectPtr conn, int callbackID) { virNetworkDriverStatePtr driver = networkGetDriver(); int ret = -1; if (virConnectNetworkEventDeregisterAnyEnsureACL(conn) < 0) goto cleanup; if (virObjectEventStateDeregisterID(conn, driver->networkEventState, callbackID, true) < 0) goto cleanup; ret = 0; cleanup: return ret; } static int networkIsActive(virNetworkPtr net) { virNetworkObjPtr obj; int ret = -1; if (!(obj = networkObjFromNetwork(net))) return ret; if (virNetworkIsActiveEnsureACL(net->conn, virNetworkObjGetDef(obj)) < 0) goto cleanup; ret = virNetworkObjIsActive(obj); cleanup: virNetworkObjEndAPI(&obj); return ret; } static int networkIsPersistent(virNetworkPtr net) { virNetworkObjPtr obj; int ret = -1; if (!(obj = networkObjFromNetwork(net))) return ret; if (virNetworkIsPersistentEnsureACL(net->conn, virNetworkObjGetDef(obj)) < 0) goto cleanup; ret = virNetworkObjIsPersistent(obj); cleanup: virNetworkObjEndAPI(&obj); return ret; } /* * networkFindUnusedBridgeName() - try to find a bridge name that is * unused by the currently configured libvirt networks, as well as by * the host system itself (possibly created by someone/something other * than libvirt). Set this network's name to that new name. */ static int networkFindUnusedBridgeName(virNetworkObjListPtr nets, virNetworkDefPtr def) { int ret = -1, id = 0; char *newname = NULL; const char *templ = "virbr%d"; const char *p; if (def->bridge && (p = strchr(def->bridge, '%')) == strrchr(def->bridge, '%') && p && p[1] == 'd') templ = def->bridge; do { if (virAsprintf(&newname, templ, id) < 0) goto cleanup; /* check if this name is used in another libvirt network or * there is an existing device with that name. ignore errors * from virNetDevExists(), just in case it isn't implemented * on this platform (probably impossible). */ if (!(virNetworkObjBridgeInUse(nets, newname, def->name) || virNetDevExists(newname) == 1)) { VIR_FREE(def->bridge); /*could contain template */ def->bridge = newname; ret = 0; goto cleanup; } VIR_FREE(newname); } while (++id <= MAX_BRIDGE_ID); virReportError(VIR_ERR_INTERNAL_ERROR, _("Bridge generation exceeded max id %d"), MAX_BRIDGE_ID); ret = 0; cleanup: if (ret < 0) VIR_FREE(newname); return ret; } /* * networkValidateBridgeName() - if no bridge name is set, or if the * bridge name contains a %d (indicating that this is a template for * the actual name) try to set an appropriate bridge name. If a * bridge name *is* set, make sure it doesn't conflict with any other * network's bridge name. */ static int networkBridgeNameValidate(virNetworkObjListPtr nets, virNetworkDefPtr def) { int ret = -1; if (def->bridge && !strstr(def->bridge, "%d")) { if (virNetworkObjBridgeInUse(nets, def->bridge, def->name)) { virReportError(VIR_ERR_INTERNAL_ERROR, _("bridge name '%s' already in use."), def->bridge); goto cleanup; } } else { /* Allocate a bridge name */ if (networkFindUnusedBridgeName(nets, def) < 0) goto cleanup; } ret = 0; cleanup: return ret; } static int networkValidate(virNetworkDriverStatePtr driver, virNetworkDefPtr def) { size_t i, j; bool vlanUsed, vlanAllowed, badVlanUse = false; virPortGroupDefPtr defaultPortGroup = NULL; virNetworkIPDefPtr ipdef; bool ipv4def = false, ipv6def = false; bool bandwidthAllowed = false; bool usesInterface = false, usesAddress = false; if (virXMLCheckIllegalChars("name", def->name, "\n") < 0) return -1; /* Only the three L3 network types that are configured by libvirt * need to have a bridge device name / mac address provided */ switch ((virNetworkForwardType) def->forward.type) { case VIR_NETWORK_FORWARD_NONE: case VIR_NETWORK_FORWARD_NAT: case VIR_NETWORK_FORWARD_ROUTE: case VIR_NETWORK_FORWARD_OPEN: /* if no bridge name was given in the config, find a name * unused by any other libvirt networks and assign it. */ if (networkBridgeNameValidate(driver->networks, def) < 0) return -1; virNetworkSetBridgeMacAddr(def); bandwidthAllowed = true; break; case VIR_NETWORK_FORWARD_BRIDGE: if (def->bridge != NULL) bandwidthAllowed = true; G_GNUC_FALLTHROUGH; case VIR_NETWORK_FORWARD_PRIVATE: case VIR_NETWORK_FORWARD_VEPA: case VIR_NETWORK_FORWARD_PASSTHROUGH: case VIR_NETWORK_FORWARD_HOSTDEV: /* They are also the only types that currently support setting * a MAC or IP address for the host-side device (bridge), DNS * configuration, or network-wide bandwidth limits. */ if (def->mac_specified) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Unsupported element in network %s " "with forward mode='%s'"), def->name, virNetworkForwardTypeToString(def->forward.type)); return -1; } if (virNetworkDefGetIPByIndex(def, AF_UNSPEC, 0)) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Unsupported element in network %s " "with forward mode='%s'"), def->name, virNetworkForwardTypeToString(def->forward.type)); return -1; } if (def->dns.ntxts || def->dns.nhosts || def->dns.nsrvs) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Unsupported element in network %s " "with forward mode='%s'"), def->name, virNetworkForwardTypeToString(def->forward.type)); return -1; } if (def->domain) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Unsupported element in network %s " "with forward mode='%s'"), def->name, virNetworkForwardTypeToString(def->forward.type)); return -1; } break; case VIR_NETWORK_FORWARD_LAST: default: virReportEnumRangeError(virNetworkForwardType, def->forward.type); return -1; } if (def->bandwidth && !bandwidthAllowed) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Unsupported network-wide element " "in network %s with forward mode='%s'"), def->name, virNetworkForwardTypeToString(def->forward.type)); return -1; } /* we support configs with a single PF defined: * * or with a list of netdev names: * * OR a list of PCI addresses *
* but not any combination of those. * * Since and
are for some strange reason * stored in the same array, we need to cycle through it and check * the type of each. */ for (i = 0; i < def->forward.nifs; i++) { virNetworkForwardIfDefPtr iface = &def->forward.ifs[i]; char *sysfs_path = NULL; switch ((virNetworkForwardHostdevDeviceType)iface->type) { case VIR_NETWORK_FORWARD_HOSTDEV_DEVICE_NETDEV: usesInterface = true; if (def->forward.type == VIR_NETWORK_FORWARD_HOSTDEV) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("hostdev network '%s' lists '%s' " "in the device pool, but hostdev " "networks require all devices to " "be listed by PCI address, not " "network device name"), def->name, iface->device.dev); return -1; } break; case VIR_NETWORK_FORWARD_HOSTDEV_DEVICE_PCI: { usesAddress = true; if (def->forward.type != VIR_NETWORK_FORWARD_HOSTDEV) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("network '%s' has forward mode '%s' " " but lists a device by PCI address " "in the device pool. This is only " "supported for networks with forward " "mode 'hostdev'"), def->name, virNetworkForwardTypeToString(def->forward.type)); return -1; } if (virPCIDeviceAddressGetSysfsFile(&iface->device.pci, &sysfs_path) < 0) return -1; if (!virPCIIsVirtualFunction(sysfs_path)) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("device '%s' in network '%s' is not " "an SR-IOV Virtual Function"), sysfs_path, def->name); VIR_FREE(sysfs_path); return -1; } VIR_FREE(sysfs_path); break; } case VIR_NETWORK_FORWARD_HOSTDEV_DEVICE_NONE: case VIR_NETWORK_FORWARD_HOSTDEV_DEVICE_LAST: break; } } if ((def->forward.npfs > 0) + usesInterface + usesAddress > 1) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("
, , and elements of " " in network %s are mutually exclusive"), def->name); return -1; } /* We only support dhcp on one IPv4 address and * on one IPv6 address per defined network */ for (i = 0; (ipdef = virNetworkDefGetIPByIndex(def, AF_UNSPEC, i)); i++) { if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET)) { if (ipdef->nranges || ipdef->nhosts) { if (ipv4def) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("Multiple IPv4 dhcp sections found -- " "dhcp is supported only for a " "single IPv4 address on each network")); return -1; } else { ipv4def = true; } } } if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET6)) { if (ipdef->nranges || ipdef->nhosts) { if (ipv6def) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("Multiple IPv6 dhcp sections found -- " "dhcp is supported only for a " "single IPv6 address on each network")); return -1; } else { ipv6def = true; } } } } /* The only type of networks that currently support transparent * vlan configuration are those using hostdev sr-iov devices from * a pool, and those using an Open vSwitch bridge. */ vlanAllowed = (def->forward.type == VIR_NETWORK_FORWARD_HOSTDEV || def->forward.type == VIR_NETWORK_FORWARD_PASSTHROUGH || (def->forward.type == VIR_NETWORK_FORWARD_BRIDGE && def->virtPortProfile && def->virtPortProfile->virtPortType == VIR_NETDEV_VPORT_PROFILE_OPENVSWITCH)); vlanUsed = def->vlan.nTags > 0; for (i = 0; i < def->nPortGroups; i++) { if (vlanUsed || def->portGroups[i].vlan.nTags > 0) { /* anyone using this portgroup will get a vlan tag. Verify * that they will also be using an openvswitch connection, * as that is the only type of network that currently * supports a vlan tag. */ if (def->portGroups[i].virtPortProfile) { if (def->forward.type != VIR_NETWORK_FORWARD_BRIDGE || def->portGroups[i].virtPortProfile->virtPortType != VIR_NETDEV_VPORT_PROFILE_OPENVSWITCH) { badVlanUse = true; } } else if (!vlanAllowed) { /* virtualport taken from base network definition */ badVlanUse = true; } } if (def->portGroups[i].isDefault) { if (defaultPortGroup) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("network '%s' has multiple default " " elements (%s and %s), " "but only one default is allowed"), def->name, defaultPortGroup->name, def->portGroups[i].name); return -1; } defaultPortGroup = &def->portGroups[i]; } for (j = i + 1; j < def->nPortGroups; j++) { if (STREQ(def->portGroups[i].name, def->portGroups[j].name)) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("multiple elements with the " "same name (%s) in network '%s'"), def->portGroups[i].name, def->name); return -1; } } if (def->portGroups[i].bandwidth && !bandwidthAllowed) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Unsupported element in network '%s' " "in portgroup '%s' with forward mode='%s'"), def->name, def->portGroups[i].name, virNetworkForwardTypeToString(def->forward.type)); return -1; } } if (badVlanUse || (vlanUsed && !vlanAllowed && !defaultPortGroup)) { /* NB: if defaultPortGroup is set, we don't directly look at * vlanUsed && !vlanAllowed, because the network will never be * used without having a portgroup added in, so all necessary * checks were done in the loop above. */ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _(" element specified for network %s, " "whose type doesn't support vlan configuration"), def->name); return -1; } if (def->forward.type == VIR_NETWORK_FORWARD_HOSTDEV) { for (i = 0; i < def->nPortGroups; i++) { if (def->portGroups[i].bandwidth) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("unsupported element " "in of " "network '%s' with forward mode='%s'"), def->portGroups[i].name, def->name, virNetworkForwardTypeToString(def->forward.type)); return -1; } } } return 0; } static virNetworkPtr networkCreateXML(virConnectPtr conn, const char *xml) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkDefPtr newDef; virNetworkObjPtr obj = NULL; virNetworkDefPtr def; virNetworkPtr net = NULL; virObjectEventPtr event = NULL; if (!(newDef = virNetworkDefParseString(xml, network_driver->xmlopt))) goto cleanup; if (virNetworkCreateXMLEnsureACL(conn, newDef) < 0) goto cleanup; if (networkValidate(driver, newDef) < 0) goto cleanup; /* NB: even though this transient network hasn't yet been started, * we assign the def with live = true in anticipation that it will * be started momentarily. */ if (!(obj = virNetworkObjAssignDef(driver->networks, newDef, VIR_NETWORK_OBJ_LIST_ADD_LIVE | VIR_NETWORK_OBJ_LIST_ADD_CHECK_LIVE))) goto cleanup; newDef = NULL; def = virNetworkObjGetDef(obj); if (networkStartNetwork(driver, obj) < 0) { virNetworkObjRemoveInactive(driver->networks, obj); goto cleanup; } event = virNetworkEventLifecycleNew(def->name, def->uuid, VIR_NETWORK_EVENT_STARTED, 0); VIR_INFO("Creating network '%s'", def->name); net = virGetNetwork(conn, def->name, def->uuid); cleanup: virNetworkDefFree(newDef); virObjectEventStateQueue(driver->networkEventState, event); virNetworkObjEndAPI(&obj); return net; } static virNetworkPtr networkDefineXML(virConnectPtr conn, const char *xml) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkDefPtr def = NULL; bool freeDef = true; virNetworkObjPtr obj = NULL; virNetworkPtr net = NULL; virObjectEventPtr event = NULL; if (!(def = virNetworkDefParseString(xml, network_driver->xmlopt))) goto cleanup; if (virNetworkDefineXMLEnsureACL(conn, def) < 0) goto cleanup; if (networkValidate(driver, def) < 0) goto cleanup; if (!(obj = virNetworkObjAssignDef(driver->networks, def, 0))) goto cleanup; /* def was assigned to network object */ freeDef = false; if (virNetworkSaveConfig(driver->networkConfigDir, def, network_driver->xmlopt) < 0) { if (!virNetworkObjIsActive(obj)) { virNetworkObjRemoveInactive(driver->networks, obj); goto cleanup; } /* if network was active already, just undo new persistent * definition by making it transient. * XXX - this isn't necessarily the correct thing to do. */ virNetworkObjUpdateAssignDef(obj, NULL, false); goto cleanup; } event = virNetworkEventLifecycleNew(def->name, def->uuid, VIR_NETWORK_EVENT_DEFINED, 0); VIR_INFO("Defining network '%s'", def->name); net = virGetNetwork(conn, def->name, def->uuid); cleanup: virObjectEventStateQueue(driver->networkEventState, event); if (freeDef) virNetworkDefFree(def); virNetworkObjEndAPI(&obj); return net; } static int networkUndefine(virNetworkPtr net) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkObjPtr obj; virNetworkDefPtr def; int ret = -1; bool active = false; virObjectEventPtr event = NULL; if (!(obj = networkObjFromNetwork(net))) goto cleanup; def = virNetworkObjGetDef(obj); if (virNetworkUndefineEnsureACL(net->conn, def) < 0) goto cleanup; if (virNetworkObjIsActive(obj)) active = true; if (!virNetworkObjIsPersistent(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, "%s", _("can't undefine transient network")); goto cleanup; } /* remove autostart link */ if (virNetworkObjDeleteConfig(driver->networkConfigDir, driver->networkAutostartDir, obj) < 0) goto cleanup; event = virNetworkEventLifecycleNew(def->name, def->uuid, VIR_NETWORK_EVENT_UNDEFINED, 0); VIR_INFO("Undefining network '%s'", def->name); if (!active) { if (networkRemoveInactive(driver, obj) < 0) goto cleanup; } else { /* if the network still exists, it was active, and we need to make * it transient (by deleting the persistent def) */ virNetworkObjUpdateAssignDef(obj, NULL, false); } ret = 0; cleanup: virObjectEventStateQueue(driver->networkEventState, event); virNetworkObjEndAPI(&obj); return ret; } static int networkUpdate(virNetworkPtr net, unsigned int command, unsigned int section, int parentIndex, const char *xml, unsigned int flags) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkObjPtr obj = NULL; virNetworkDefPtr def; int isActive, ret = -1; size_t i; virNetworkIPDefPtr ipdef; bool oldDhcpActive = false; bool needFirewallRefresh = false; virCheckFlags(VIR_NETWORK_UPDATE_AFFECT_LIVE | VIR_NETWORK_UPDATE_AFFECT_CONFIG, -1); if (!(obj = networkObjFromNetwork(net))) goto cleanup; def = virNetworkObjGetDef(obj); if (virNetworkUpdateEnsureACL(net->conn, def, flags) < 0) goto cleanup; /* see if we are listening for dhcp pre-modification */ for (i = 0; (ipdef = virNetworkDefGetIPByIndex(def, AF_INET, i)); i++) { if (ipdef->nranges || ipdef->nhosts) { oldDhcpActive = true; break; } } /* VIR_NETWORK_UPDATE_AFFECT_CURRENT means "change LIVE if network * is active, else change CONFIG */ isActive = virNetworkObjIsActive(obj); if ((flags & (VIR_NETWORK_UPDATE_AFFECT_LIVE | VIR_NETWORK_UPDATE_AFFECT_CONFIG)) == VIR_NETWORK_UPDATE_AFFECT_CURRENT) { if (isActive) flags |= VIR_NETWORK_UPDATE_AFFECT_LIVE; else flags |= VIR_NETWORK_UPDATE_AFFECT_CONFIG; } if (isActive && (flags & VIR_NETWORK_UPDATE_AFFECT_LIVE)) { /* Take care of anything that must be done before updating the * live NetworkDef. */ switch ((virNetworkForwardType) def->forward.type) { case VIR_NETWORK_FORWARD_NONE: case VIR_NETWORK_FORWARD_NAT: case VIR_NETWORK_FORWARD_ROUTE: switch (section) { case VIR_NETWORK_SECTION_FORWARD: case VIR_NETWORK_SECTION_FORWARD_INTERFACE: case VIR_NETWORK_SECTION_IP: case VIR_NETWORK_SECTION_IP_DHCP_RANGE: case VIR_NETWORK_SECTION_IP_DHCP_HOST: /* these could affect the firewall rules, so remove the * old rules (and remember to load new ones after the * update). */ networkRemoveFirewallRules(def); needFirewallRefresh = true; break; default: break; } break; case VIR_NETWORK_FORWARD_OPEN: case VIR_NETWORK_FORWARD_BRIDGE: case VIR_NETWORK_FORWARD_PRIVATE: case VIR_NETWORK_FORWARD_VEPA: case VIR_NETWORK_FORWARD_PASSTHROUGH: case VIR_NETWORK_FORWARD_HOSTDEV: break; case VIR_NETWORK_FORWARD_LAST: default: virReportEnumRangeError(virNetworkForwardType, def->forward.type); goto cleanup; } } /* update the network config in memory/on disk */ if (virNetworkObjUpdate(obj, command, section, parentIndex, xml, network_driver->xmlopt, flags) < 0) { if (needFirewallRefresh) ignore_value(networkAddFirewallRules(def)); goto cleanup; } /* @def is replaced */ def = virNetworkObjGetDef(obj); if (needFirewallRefresh && networkAddFirewallRules(def) < 0) goto cleanup; if (flags & VIR_NETWORK_UPDATE_AFFECT_CONFIG) { /* save updated persistent config to disk */ if (virNetworkSaveConfig(driver->networkConfigDir, virNetworkObjGetPersistentDef(obj), network_driver->xmlopt) < 0) { goto cleanup; } } if (isActive && (flags & VIR_NETWORK_UPDATE_AFFECT_LIVE)) { /* rewrite dnsmasq host files, restart dnsmasq, update iptables * rules, etc, according to which section was modified. Note that * some sections require multiple actions, so a single switch * statement is inadequate. */ if (section == VIR_NETWORK_SECTION_BRIDGE || section == VIR_NETWORK_SECTION_DOMAIN || section == VIR_NETWORK_SECTION_IP || section == VIR_NETWORK_SECTION_IP_DHCP_RANGE || section == VIR_NETWORK_SECTION_DNS_TXT || section == VIR_NETWORK_SECTION_DNS_SRV) { /* these sections all change things on the dnsmasq * commandline (i.e. in the .conf file), so we need to * kill and restart dnsmasq, because dnsmasq sets its uid * to "nobody" after it starts, and is unable to re-read * the conf file (owned by root, mode 600) */ if (networkRestartDhcpDaemon(driver, obj) < 0) goto cleanup; } else if (section == VIR_NETWORK_SECTION_IP_DHCP_HOST) { /* if we previously weren't listening for dhcp and now we * are (or vice-versa) then we need to do a restart, * otherwise we just need to do a refresh (redo the config * files and send SIGHUP) */ bool newDhcpActive = false; for (i = 0; (ipdef = virNetworkDefGetIPByIndex(def, AF_INET, i)); i++) { if (ipdef->nranges || ipdef->nhosts) { newDhcpActive = true; break; } } if ((newDhcpActive != oldDhcpActive && networkRestartDhcpDaemon(driver, obj) < 0) || networkRefreshDhcpDaemon(driver, obj) < 0) { goto cleanup; } } else if (section == VIR_NETWORK_SECTION_DNS_HOST) { /* this section only changes data in an external file * (not the .conf file) so we can just update the config * files and send SIGHUP to dnsmasq. */ if (networkRefreshDhcpDaemon(driver, obj) < 0) goto cleanup; } if (section == VIR_NETWORK_SECTION_IP) { /* only a change in IP addresses will affect radvd, and all of radvd's * config is stored in the conf file which will be re-read with a SIGHUP. */ if (networkRefreshRadvd(driver, obj) < 0) goto cleanup; } /* save current network state to disk */ if ((ret = virNetworkObjSaveStatus(driver->stateDir, obj, network_driver->xmlopt)) < 0) goto cleanup; } /* call the 'updated' network hook script */ if (networkRunHook(obj, NULL, VIR_HOOK_NETWORK_OP_UPDATED, VIR_HOOK_SUBOP_BEGIN) < 0) goto cleanup; ret = 0; cleanup: virNetworkObjEndAPI(&obj); return ret; } static int networkCreate(virNetworkPtr net) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkObjPtr obj; virNetworkDefPtr def; int ret = -1; virObjectEventPtr event = NULL; if (!(obj = networkObjFromNetwork(net))) goto cleanup; def = virNetworkObjGetDef(obj); if (virNetworkCreateEnsureACL(net->conn, def) < 0) goto cleanup; if ((ret = networkStartNetwork(driver, obj)) < 0) goto cleanup; event = virNetworkEventLifecycleNew(def->name, def->uuid, VIR_NETWORK_EVENT_STARTED, 0); cleanup: virObjectEventStateQueue(driver->networkEventState, event); virNetworkObjEndAPI(&obj); return ret; } static int networkDestroy(virNetworkPtr net) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkObjPtr obj; virNetworkDefPtr def; int ret = -1; virObjectEventPtr event = NULL; if (!(obj = networkObjFromNetwork(net))) goto cleanup; def = virNetworkObjGetDef(obj); if (virNetworkDestroyEnsureACL(net->conn, def) < 0) goto cleanup; if (!virNetworkObjIsActive(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, _("network '%s' is not active"), def->name); goto cleanup; } if ((ret = networkShutdownNetwork(driver, obj)) < 0) goto cleanup; virNetworkObjDeleteAllPorts(obj, driver->stateDir); /* @def replaced in virNetworkObjUnsetDefTransient*/ def = virNetworkObjGetDef(obj); event = virNetworkEventLifecycleNew(def->name, def->uuid, VIR_NETWORK_EVENT_STOPPED, 0); if (!virNetworkObjIsPersistent(obj) && networkRemoveInactive(driver, obj) < 0) { ret = -1; goto cleanup; } cleanup: virObjectEventStateQueue(driver->networkEventState, event); virNetworkObjEndAPI(&obj); return ret; } static char * networkGetXMLDesc(virNetworkPtr net, unsigned int flags) { virNetworkObjPtr obj; virNetworkDefPtr curDef; virNetworkDefPtr def; virNetworkDefPtr newDef; char *ret = NULL; virCheckFlags(VIR_NETWORK_XML_INACTIVE, NULL); if (!(obj = networkObjFromNetwork(net))) return ret; def = virNetworkObjGetDef(obj); newDef = virNetworkObjGetNewDef(obj); if (virNetworkGetXMLDescEnsureACL(net->conn, def) < 0) goto cleanup; if ((flags & VIR_NETWORK_XML_INACTIVE) && newDef) curDef = newDef; else curDef = def; ret = virNetworkDefFormat(curDef, network_driver->xmlopt, flags); cleanup: virNetworkObjEndAPI(&obj); return ret; } static char * networkGetBridgeName(virNetworkPtr net) { virNetworkObjPtr obj; virNetworkDefPtr def; char *bridge = NULL; if (!(obj = networkObjFromNetwork(net))) return bridge; def = virNetworkObjGetDef(obj); if (virNetworkGetBridgeNameEnsureACL(net->conn, def) < 0) goto cleanup; if (!(def->bridge)) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' does not have a bridge name."), def->name); goto cleanup; } ignore_value(VIR_STRDUP(bridge, def->bridge)); cleanup: virNetworkObjEndAPI(&obj); return bridge; } static int networkGetAutostart(virNetworkPtr net, int *autostart) { virNetworkObjPtr obj; int ret = -1; if (!(obj = networkObjFromNetwork(net))) return ret; if (virNetworkGetAutostartEnsureACL(net->conn, virNetworkObjGetDef(obj)) < 0) goto cleanup; *autostart = virNetworkObjIsAutostart(obj) ? 1 : 0; ret = 0; cleanup: virNetworkObjEndAPI(&obj); return ret; } static int networkSetAutostart(virNetworkPtr net, int autostart) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkObjPtr obj; virNetworkDefPtr def; char *configFile = NULL, *autostartLink = NULL; bool new_autostart; bool cur_autostart; int ret = -1; if (!(obj = networkObjFromNetwork(net))) goto cleanup; def = virNetworkObjGetDef(obj); if (virNetworkSetAutostartEnsureACL(net->conn, def) < 0) goto cleanup; if (!virNetworkObjIsPersistent(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, "%s", _("cannot set autostart for transient network")); goto cleanup; } new_autostart = (autostart != 0); cur_autostart = virNetworkObjIsAutostart(obj); if (cur_autostart != new_autostart) { if ((configFile = virNetworkConfigFile(driver->networkConfigDir, def->name)) == NULL) goto cleanup; if ((autostartLink = virNetworkConfigFile(driver->networkAutostartDir, def->name)) == NULL) goto cleanup; if (new_autostart) { if (virFileMakePath(driver->networkAutostartDir) < 0) { virReportSystemError(errno, _("cannot create autostart directory '%s'"), driver->networkAutostartDir); goto cleanup; } if (symlink(configFile, autostartLink) < 0) { virReportSystemError(errno, _("Failed to create symlink '%s' to '%s'"), autostartLink, configFile); goto cleanup; } } else { if (unlink(autostartLink) < 0 && errno != ENOENT && errno != ENOTDIR) { virReportSystemError(errno, _("Failed to delete symlink '%s'"), autostartLink); goto cleanup; } } virNetworkObjSetAutostart(obj, new_autostart); } ret = 0; cleanup: VIR_FREE(configFile); VIR_FREE(autostartLink); virNetworkObjEndAPI(&obj); return ret; } static int networkGetDHCPLeases(virNetworkPtr net, const char *mac, virNetworkDHCPLeasePtr **leases, unsigned int flags) { virNetworkDriverStatePtr driver = networkGetDriver(); size_t i, j; size_t nleases = 0; int rv = -1; size_t size = 0; int custom_lease_file_len = 0; bool need_results = !!leases; long long currtime = 0; long long expirytime_tmp = -1; bool ipv6 = false; char *lease_entries = NULL; char *custom_lease_file = NULL; const char *ip_tmp = NULL; const char *mac_tmp = NULL; virJSONValuePtr lease_tmp = NULL; virJSONValuePtr leases_array = NULL; virNetworkIPDefPtr ipdef_tmp = NULL; virNetworkDHCPLeasePtr lease = NULL; virNetworkDHCPLeasePtr *leases_ret = NULL; virNetworkObjPtr obj; virNetworkDefPtr def; virMacAddr mac_addr; virCheckFlags(0, -1); /* only to check if the MAC is valid */ if (mac && virMacAddrParse(mac, &mac_addr) < 0) { virReportError(VIR_ERR_INVALID_MAC, "%s", mac); return -1; } if (!(obj = networkObjFromNetwork(net))) return -1; def = virNetworkObjGetDef(obj); if (virNetworkGetDHCPLeasesEnsureACL(net->conn, def) < 0) goto cleanup; /* Retrieve custom leases file location */ custom_lease_file = networkDnsmasqLeaseFileNameCustom(driver, def->bridge); /* Read entire contents */ if ((custom_lease_file_len = virFileReadAllQuiet(custom_lease_file, VIR_NETWORK_DHCP_LEASE_FILE_SIZE_MAX, &lease_entries)) < 0) { /* Not all networks are guaranteed to have leases file. * Only those which run dnsmasq. Therefore, if we failed * to read the leases file, don't report error. Return 0 * leases instead. */ if (errno == ENOENT) { rv = 0; } else { virReportSystemError(errno, _("Unable to read leases file: %s"), custom_lease_file); } goto error; } if (custom_lease_file_len) { if (!(leases_array = virJSONValueFromString(lease_entries))) { virReportError(VIR_ERR_INTERNAL_ERROR, _("invalid json in file: %s"), custom_lease_file); goto error; } if (!virJSONValueIsArray(leases_array)) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Malformed lease_entries array")); goto error; } size = virJSONValueArraySize(leases_array); } currtime = (long long)time(NULL); for (i = 0; i < size; i++) { if (!(lease_tmp = virJSONValueArrayGet(leases_array, i))) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("failed to parse json")); goto error; } if (!(mac_tmp = virJSONValueObjectGetString(lease_tmp, "mac-address"))) { /* leaseshelper program guarantees that lease will be stored only if * mac-address is known otherwise not */ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("found lease without mac-address")); goto error; } if (mac && virMacAddrCompare(mac, mac_tmp)) continue; if (virJSONValueObjectGetNumberLong(lease_tmp, "expiry-time", &expirytime_tmp) < 0) { /* A lease cannot be present without expiry-time */ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("found lease without expiry-time")); goto error; } /* Do not report expired lease */ if (expirytime_tmp < currtime) continue; if (need_results) { if (VIR_ALLOC(lease) < 0) goto error; lease->expirytime = expirytime_tmp; if (!(ip_tmp = virJSONValueObjectGetString(lease_tmp, "ip-address"))) { /* A lease without ip-address makes no sense */ virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("found lease without ip-address")); goto error; } /* Unlike IPv4, IPv6 uses ':' instead of '.' as separator */ ipv6 = strchr(ip_tmp, ':') ? true : false; lease->type = ipv6 ? VIR_IP_ADDR_TYPE_IPV6 : VIR_IP_ADDR_TYPE_IPV4; /* Obtain prefix */ for (j = 0; j < def->nips; j++) { ipdef_tmp = &def->ips[j]; if (ipv6 && VIR_SOCKET_ADDR_IS_FAMILY(&ipdef_tmp->address, AF_INET6)) { lease->prefix = ipdef_tmp->prefix; break; } if (!ipv6 && VIR_SOCKET_ADDR_IS_FAMILY(&ipdef_tmp->address, AF_INET)) { lease->prefix = virSocketAddrGetIPPrefix(&ipdef_tmp->address, &ipdef_tmp->netmask, ipdef_tmp->prefix); break; } } if ((VIR_STRDUP(lease->mac, mac_tmp) < 0) || (VIR_STRDUP(lease->ipaddr, ip_tmp) < 0) || (VIR_STRDUP(lease->iface, def->bridge) < 0)) goto error; /* Fields that can be NULL */ if ((VIR_STRDUP(lease->iaid, virJSONValueObjectGetString(lease_tmp, "iaid")) < 0) || (VIR_STRDUP(lease->clientid, virJSONValueObjectGetString(lease_tmp, "client-id")) < 0) || (VIR_STRDUP(lease->hostname, virJSONValueObjectGetString(lease_tmp, "hostname")) < 0)) goto error; if (VIR_INSERT_ELEMENT(leases_ret, nleases, nleases, lease) < 0) goto error; } else { nleases++; } VIR_FREE(lease); } if (leases_ret) { /* NULL terminated array */ ignore_value(VIR_REALLOC_N(leases_ret, nleases + 1)); *leases = leases_ret; leases_ret = NULL; } rv = nleases; cleanup: VIR_FREE(lease); VIR_FREE(lease_entries); VIR_FREE(custom_lease_file); virJSONValueFree(leases_array); virNetworkObjEndAPI(&obj); return rv; error: if (leases_ret) { for (i = 0; i < nleases; i++) virNetworkDHCPLeaseFree(leases_ret[i]); VIR_FREE(leases_ret); } goto cleanup; } /* A unified function to log network connections and disconnections */ static void networkLogAllocation(virNetworkDefPtr netdef, virNetworkForwardIfDefPtr dev, virMacAddrPtr mac, bool inUse) { char macStr[VIR_MAC_STRING_BUFLEN]; const char *verb = inUse ? "using" : "releasing"; virMacAddrFormat(mac, macStr); if (!dev) { VIR_INFO("MAC %s %s network %s (%d connections)", macStr, verb, netdef->name, netdef->connections); } else { if (dev->type == VIR_NETWORK_FORWARD_HOSTDEV_DEVICE_PCI) { VIR_INFO("MAC %s %s network %s (%d connections) " "physical device %04x:%02x:%02x.%x (%d connections)", macStr, verb, netdef->name, netdef->connections, dev->device.pci.domain, dev->device.pci.bus, dev->device.pci.slot, dev->device.pci.function, dev->connections); } else { VIR_INFO("MAC %s %s network %s (%d connections) " "physical device %s (%d connections)", macStr, verb, netdef->name, netdef->connections, dev->device.dev, dev->connections); } } } /* Private API to deal with logical switch capabilities. * These functions are exported so that other parts of libvirt can * call them, but are not part of the public API and not in the * driver's function table. If we ever have more than one network * driver, we will need to present these functions via a second * "backend" function table. */ /* networkAllocatePort: * @obj: the network to allocate from * @port: the port definition to allocate * * Looks up the network reference by port, allocates a physical * device from that network (if appropriate), and returns with the * port configuration filled in accordingly. * * Returns 0 on success, -1 on failure. */ static int networkAllocatePort(virNetworkObjPtr obj, virNetworkPortDefPtr port) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkDefPtr netdef = NULL; virPortGroupDefPtr portgroup = NULL; virNetworkForwardIfDefPtr dev = NULL; size_t i; int ret = -1; virNetDevVPortProfilePtr portprofile = NULL; netdef = virNetworkObjGetDef(obj); VIR_DEBUG("Allocating port from net %s", netdef->name); if (!virNetworkObjIsActive(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, _("network '%s' is not active"), netdef->name); goto cleanup; } VIR_DEBUG("Interface port group %s", port->group); /* portgroup can be present for any type of network, in particular * for bandwidth information, so we need to check for that and * fill it in appropriately for all forward types. */ portgroup = virPortGroupFindByName(netdef, port->group); if (!port->bandwidth) { if (portgroup && portgroup->bandwidth && virNetDevBandwidthCopy(&port->bandwidth, portgroup->bandwidth) < 0) goto cleanup; } if (port->vlan.nTags == 0) { virNetDevVlanPtr vlan = NULL; if (portgroup && portgroup->vlan.nTags > 0) vlan = &portgroup->vlan; else if (netdef->vlan.nTags > 0) vlan = &netdef->vlan; if (vlan && virNetDevVlanCopy(&port->vlan, vlan) < 0) goto cleanup; } if (!port->trustGuestRxFilters) { if (portgroup && portgroup->trustGuestRxFilters) port->trustGuestRxFilters = portgroup->trustGuestRxFilters; else if (netdef->trustGuestRxFilters) port->trustGuestRxFilters = netdef->trustGuestRxFilters; } /* merge virtualports from interface, network, and portgroup to * arrive at actual virtualport to use */ if (virNetDevVPortProfileMerge3(&portprofile, port->virtPortProfile, netdef->virtPortProfile, portgroup ? portgroup->virtPortProfile : NULL) < 0) { goto cleanup; } if (portprofile) { VIR_FREE(port->virtPortProfile); port->virtPortProfile = portprofile; } VIR_DEBUG("Processing forward type %d", netdef->forward.type); switch ((virNetworkForwardType) netdef->forward.type) { case VIR_NETWORK_FORWARD_NONE: case VIR_NETWORK_FORWARD_NAT: case VIR_NETWORK_FORWARD_ROUTE: case VIR_NETWORK_FORWARD_OPEN: /* for these forward types, the actual net type really *is* * NETWORK; we just keep the info from the portgroup in * iface->data.network.actual */ port->plugtype = VIR_NETWORK_PORT_PLUG_TYPE_NETWORK; if (VIR_STRDUP(port->plug.bridge.brname, netdef->bridge) < 0) goto cleanup; port->plug.bridge.macTableManager = netdef->macTableManager; if (port->virtPortProfile) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _(" not supported for network " "'%s' which uses IP forwarding"), virNetDevVPortTypeToString(port->virtPortProfile->virtPortType), netdef->name); goto cleanup; } if (networkPlugBandwidth(obj, &port->mac, port->bandwidth, &port->class_id) < 0) goto cleanup; break; case VIR_NETWORK_FORWARD_HOSTDEV: { port->plugtype = VIR_NETWORK_PORT_PLUG_TYPE_HOSTDEV_PCI; if (networkCreateInterfacePool(netdef) < 0) goto cleanup; /* pick first dev with 0 connections */ for (i = 0; i < netdef->forward.nifs; i++) { if (netdef->forward.ifs[i].connections == 0) { dev = &netdef->forward.ifs[i]; break; } } if (!dev) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' requires exclusive access " "to interfaces, but none are available"), netdef->name); goto cleanup; } port->plug.hostdevpci.addr = dev->device.pci; port->plug.hostdevpci.driver = netdef->forward.driverName; port->plug.hostdevpci.managed = netdef->forward.managed; if (port->virtPortProfile) { /* make sure type is supported for hostdev connections */ if (port->virtPortProfile->virtPortType != VIR_NETDEV_VPORT_PROFILE_8021QBG && port->virtPortProfile->virtPortType != VIR_NETDEV_VPORT_PROFILE_8021QBH) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _(" not supported for network " "'%s' which uses an SR-IOV Virtual Function " "via PCI passthrough"), virNetDevVPortTypeToString(port->virtPortProfile->virtPortType), netdef->name); goto cleanup; } } break; } case VIR_NETWORK_FORWARD_BRIDGE: if (netdef->bridge) { /* * is VIR_DOMAIN_NET_TYPE_BRIDGE */ port->plugtype = VIR_NETWORK_PORT_PLUG_TYPE_BRIDGE; if (VIR_STRDUP(port->plug.bridge.brname, netdef->bridge) < 0) goto cleanup; port->plug.bridge.macTableManager = netdef->macTableManager; if (port->virtPortProfile) { /* only type='openvswitch' is allowed for bridges */ if (port->virtPortProfile->virtPortType != VIR_NETDEV_VPORT_PROFILE_OPENVSWITCH) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _(" not supported for network " "'%s' which uses a bridge device"), virNetDevVPortTypeToString(port->virtPortProfile->virtPortType), netdef->name); goto cleanup; } } if (networkPlugBandwidth(obj, &port->mac, port->bandwidth, &port->class_id) < 0) goto cleanup; break; } /* intentionally fall through to the direct case for * VIR_NETWORK_FORWARD_BRIDGE with no bridge device defined */ G_GNUC_FALLTHROUGH; case VIR_NETWORK_FORWARD_PRIVATE: case VIR_NETWORK_FORWARD_VEPA: case VIR_NETWORK_FORWARD_PASSTHROUGH: /* are all * VIR_DOMAIN_NET_TYPE_DIRECT. */ /* Set type=direct and appropriate */ port->plugtype = VIR_NETWORK_PORT_PLUG_TYPE_DIRECT; /* NO need to check the value returned from virNetDevMacVLanModeTypeFromString * it must be valid for these forward type(bridge|private|vepa|passthrough) */ port->plug.direct.mode = virNetDevMacVLanModeTypeFromString(virNetworkForwardTypeToString(netdef->forward.type)); if (port->virtPortProfile) { /* make sure type is supported for macvtap connections */ if (port->virtPortProfile->virtPortType != VIR_NETDEV_VPORT_PROFILE_8021QBG && port->virtPortProfile->virtPortType != VIR_NETDEV_VPORT_PROFILE_8021QBH) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _(" not supported for network " "'%s' which uses a macvtap device"), virNetDevVPortTypeToString(port->virtPortProfile->virtPortType), netdef->name); goto cleanup; } } /* If there is only a single device, just return it (caller will detect * any error if exclusive use is required but could not be acquired). */ if ((netdef->forward.nifs <= 0) && (netdef->forward.npfs <= 0)) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' uses a direct mode, but " "has no forward dev and no interface pool"), netdef->name); goto cleanup; } else { /* pick an interface from the pool */ if (networkCreateInterfacePool(netdef) < 0) goto cleanup; /* PASSTHROUGH mode, and PRIVATE Mode + 802.1Qbh both * require exclusive access to a device, so current * connections count must be 0. Other modes can share, so * just search for the one with the lowest number of * connections. */ if ((netdef->forward.type == VIR_NETWORK_FORWARD_PASSTHROUGH) || ((netdef->forward.type == VIR_NETWORK_FORWARD_PRIVATE) && port->virtPortProfile && (port->virtPortProfile->virtPortType == VIR_NETDEV_VPORT_PROFILE_8021QBH))) { /* pick first dev with 0 connections */ for (i = 0; i < netdef->forward.nifs; i++) { if (netdef->forward.ifs[i].connections == 0) { dev = &netdef->forward.ifs[i]; break; } } } else { /* pick least used dev */ dev = &netdef->forward.ifs[0]; for (i = 1; i < netdef->forward.nifs; i++) { if (netdef->forward.ifs[i].connections < dev->connections) dev = &netdef->forward.ifs[i]; } } /* dev points at the physical device we want to use */ if (!dev) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' requires exclusive access " "to interfaces, but none are available"), netdef->name); goto cleanup; } if (VIR_STRDUP(port->plug.direct.linkdev, dev->device.dev) < 0) goto cleanup; } break; case VIR_NETWORK_FORWARD_LAST: default: virReportEnumRangeError(virNetworkForwardType, netdef->forward.type); goto cleanup; } if (virNetworkObjMacMgrAdd(obj, driver->dnsmasqStateDir, port->ownername, &port->mac) < 0) goto cleanup; if (virNetDevVPortProfileCheckComplete(port->virtPortProfile, true) < 0) goto cleanup; /* make sure that everything now specified for the device is * actually supported on this type of network. NB: network, * netdev, and iface->data.network.actual may all be NULL. */ VIR_DEBUG("Sanity check port config"); if (port->vlan.nTags) { /* vlan configuration via libvirt is only supported for PCI * Passthrough SR-IOV devices (hostdev or macvtap passthru * mode) and openvswitch bridges. Otherwise log an error and * fail */ if (!(port->plugtype == VIR_NETWORK_PORT_PLUG_TYPE_HOSTDEV_PCI || (port->plugtype == VIR_NETWORK_PORT_PLUG_TYPE_DIRECT && port->plug.direct.mode == VIR_NETDEV_MACVLAN_MODE_PASSTHRU) || (port->plugtype == VIR_NETWORK_PORT_PLUG_TYPE_BRIDGE && port->virtPortProfile && port->virtPortProfile->virtPortType == VIR_NETDEV_VPORT_PROFILE_OPENVSWITCH))) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("an interface connecting to network '%s' " "is requesting a vlan tag, but that is not " "supported for this type of network"), netdef->name); goto cleanup; } } /* bandwidth configuration via libvirt is not supported for * hostdev network devices */ if (port->bandwidth && port->plugtype == VIR_NETWORK_PORT_PLUG_TYPE_HOSTDEV_PCI) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("bandwidth settings are not supported " "for hostdev interfaces")); goto cleanup; } netdef->connections++; if (dev) dev->connections++; /* finally we can call the 'plugged' hook script if any */ if (networkRunHook(obj, port, VIR_HOOK_NETWORK_OP_PORT_CREATED, VIR_HOOK_SUBOP_BEGIN) < 0) { /* adjust for failure */ netdef->connections--; if (dev) dev->connections--; goto cleanup; } networkLogAllocation(netdef, dev, &port->mac, true); VIR_DEBUG("Port allocated"); ret = 0; cleanup: return ret; } /* networkNotifyPort: * @obj: the network to notify * @port: the port definition to notify * * Called to notify the network driver when libvirtd is restarted and * finds an already running domain. If appropriate it will force an * allocation of the actual->direct.linkdev to get everything back in * order. */ static int networkNotifyPort(virNetworkObjPtr obj, virNetworkPortDefPtr port) { virNetworkDefPtr netdef; virNetworkForwardIfDefPtr dev = NULL; size_t i; int ret = -1; netdef = virNetworkObjGetDef(obj); if (!virNetworkObjIsActive(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, _("network '%s' is not active"), netdef->name); goto cleanup; } switch (port->plugtype) { case VIR_NETWORK_PORT_PLUG_TYPE_NONE: virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Unexpectedly got a network port without a plug")); goto cleanup; case VIR_NETWORK_PORT_PLUG_TYPE_NETWORK: case VIR_NETWORK_PORT_PLUG_TYPE_BRIDGE: /* see if we're connected to the correct bridge */ if (!netdef->bridge) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Unexpectedly got a network port without a network bridge")); goto cleanup; } break; case VIR_NETWORK_PORT_PLUG_TYPE_DIRECT: if (networkCreateInterfacePool(netdef) < 0) goto cleanup; /* find the matching interface and increment its connections */ for (i = 0; i < netdef->forward.nifs; i++) { if (netdef->forward.ifs[i].type == VIR_NETWORK_FORWARD_HOSTDEV_DEVICE_NETDEV && STREQ(port->plug.direct.linkdev, netdef->forward.ifs[i].device.dev)) { dev = &netdef->forward.ifs[i]; break; } } /* dev points at the physical device we want to use */ if (!dev) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' doesn't have dev='%s' " "in use by network port '%s'"), netdef->name, port->plug.direct.linkdev, port->uuid); goto cleanup; } /* PASSTHROUGH mode and PRIVATE Mode + 802.1Qbh both require * exclusive access to a device, so current connections count * must be 0 in those cases. */ if ((dev->connections > 0) && ((netdef->forward.type == VIR_NETWORK_FORWARD_PASSTHROUGH) || ((netdef->forward.type == VIR_NETWORK_FORWARD_PRIVATE) && port->virtPortProfile && (port->virtPortProfile->virtPortType == VIR_NETDEV_VPORT_PROFILE_8021QBH)))) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' claims dev='%s' is already in " "use by a different port"), netdef->name, port->plug.direct.linkdev); goto cleanup; } break; case VIR_NETWORK_PORT_PLUG_TYPE_HOSTDEV_PCI: if (networkCreateInterfacePool(netdef) < 0) goto cleanup; /* find the matching interface and increment its connections */ for (i = 0; i < netdef->forward.nifs; i++) { if (netdef->forward.ifs[i].type == VIR_NETWORK_FORWARD_HOSTDEV_DEVICE_PCI && virPCIDeviceAddressEqual(&port->plug.hostdevpci.addr, &netdef->forward.ifs[i].device.pci)) { dev = &netdef->forward.ifs[i]; break; } } /* dev points at the physical device we want to use */ if (!dev) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' doesn't have " "PCI device %04x:%02x:%02x.%x in use by network port"), netdef->name, port->plug.hostdevpci.addr.domain, port->plug.hostdevpci.addr.bus, port->plug.hostdevpci.addr.slot, port->plug.hostdevpci.addr.function); goto cleanup; } /* PASSTHROUGH mode, PRIVATE Mode + 802.1Qbh, and hostdev (PCI * passthrough) all require exclusive access to a device, so * current connections count must be 0 in those cases. */ if ((dev->connections > 0) && netdef->forward.type == VIR_NETWORK_FORWARD_HOSTDEV) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' claims the PCI device at " "domain=%d bus=%d slot=%d function=%d " "is already in use by a different network port"), netdef->name, dev->device.pci.domain, dev->device.pci.bus, dev->device.pci.slot, dev->device.pci.function); goto cleanup; } break; case VIR_NETWORK_PORT_PLUG_TYPE_LAST: default: virReportEnumRangeError(virNetworkPortPlugType, port->plugtype); goto cleanup; } netdef->connections++; if (dev) dev->connections++; /* finally we can call the 'plugged' hook script if any */ if (networkRunHook(obj, port, VIR_HOOK_NETWORK_OP_PORT_CREATED, VIR_HOOK_SUBOP_BEGIN) < 0) { /* adjust for failure */ if (dev) dev->connections--; netdef->connections--; goto cleanup; } networkLogAllocation(netdef, dev, &port->mac, true); ret = 0; cleanup: return ret; } /* networkReleasePort: * @obj: the network to release from * @port: the port definition to release * * Given a domain element that previously had its * element filled in (and possibly a physical device allocated to it), * free up the physical device for use by someone else, and free the * virDomainActualNetDef. * * Returns 0 on success, -1 on failure. */ static int networkReleasePort(virNetworkObjPtr obj, virNetworkPortDefPtr port) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkDefPtr netdef; virNetworkForwardIfDefPtr dev = NULL; size_t i; int ret = -1; netdef = virNetworkObjGetDef(obj); switch ((virNetworkPortPlugType)port->plugtype) { case VIR_NETWORK_PORT_PLUG_TYPE_NONE: VIR_DEBUG("Releasing network device with no plug type"); break; case VIR_NETWORK_PORT_PLUG_TYPE_NETWORK: case VIR_NETWORK_PORT_PLUG_TYPE_BRIDGE: if (networkUnplugBandwidth(obj, port->bandwidth, &port->class_id) < 0) goto cleanup; break; case VIR_NETWORK_PORT_PLUG_TYPE_DIRECT: if (netdef->forward.nifs == 0) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' uses a direct mode, but " "has no forward dev and no interface pool"), netdef->name); goto cleanup; } for (i = 0; i < netdef->forward.nifs; i++) { if (netdef->forward.ifs[i].type == VIR_NETWORK_FORWARD_HOSTDEV_DEVICE_NETDEV && STREQ(port->plug.direct.linkdev, netdef->forward.ifs[i].device.dev)) { dev = &netdef->forward.ifs[i]; break; } } if (!dev) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' doesn't have dev='%s' " "in use by domain"), netdef->name, port->plug.direct.linkdev); goto cleanup; } break; case VIR_NETWORK_PORT_PLUG_TYPE_HOSTDEV_PCI: if (netdef->forward.nifs == 0) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' uses a hostdev mode, but " "has no forward dev and no interface pool"), netdef->name); goto cleanup; } for (i = 0; i < netdef->forward.nifs; i++) { if (netdef->forward.ifs[i].type == VIR_NETWORK_FORWARD_HOSTDEV_DEVICE_PCI && virPCIDeviceAddressEqual(&port->plug.hostdevpci.addr, &netdef->forward.ifs[i].device.pci)) { dev = &netdef->forward.ifs[i]; break; } } if (!dev) { virReportError(VIR_ERR_INTERNAL_ERROR, _("network '%s' doesn't have " "PCI device %04x:%02x:%02x.%x in use by domain"), netdef->name, port->plug.hostdevpci.addr.domain, port->plug.hostdevpci.addr.bus, port->plug.hostdevpci.addr.slot, port->plug.hostdevpci.addr.function); goto cleanup; } break; case VIR_NETWORK_PORT_PLUG_TYPE_LAST: default: virReportEnumRangeError(virNetworkPortPlugType, port->plugtype); goto cleanup; } virNetworkObjMacMgrDel(obj, driver->dnsmasqStateDir, port->ownername, &port->mac); netdef->connections--; if (dev) dev->connections--; /* finally we can call the 'unplugged' hook script if any */ networkRunHook(obj, port, VIR_HOOK_NETWORK_OP_PORT_DELETED, VIR_HOOK_SUBOP_BEGIN); networkLogAllocation(netdef, dev, &port->mac, false); ret = 0; cleanup: return ret; } /** * networkCheckBandwidth: * @net: network QoS * @ifaceBand: interface QoS (may be NULL if no QoS) * @oldBandwidth: new interface QoS (may be NULL if no QoS) * @ifaceMac: interface MAC (used in error messages for identification) * @new_rate: new rate for non guaranteed class * * Function checks if @ifaceBand can be satisfied on @net. However, sometimes it * may happen that the interface that @ifaceBand corresponds to is already * plugged into the @net and the bandwidth is to be updated. In that case we * need to check if new bandwidth can be satisfied. If that's the case * @ifaceBand should point to new bandwidth settings and @oldBandwidth to * current ones. If you want to suppress this functionality just pass * @oldBandwidth == NULL. * * Returns: -1 if plugging would overcommit network QoS * 0 if plugging is safe (@new_rate updated) * 1 if no QoS is set (@new_rate untouched) */ static int networkCheckBandwidth(virNetworkObjPtr obj, virNetDevBandwidthPtr ifaceBand, virNetDevBandwidthPtr oldBandwidth, virMacAddrPtr ifaceMac, unsigned long long *new_rate) { int ret = -1; virNetworkDefPtr def = virNetworkObjGetDef(obj); virNetDevBandwidthPtr netBand = def->bandwidth; unsigned long long tmp_floor_sum = virNetworkObjGetFloorSum(obj); unsigned long long tmp_new_rate = 0; char ifmac[VIR_MAC_STRING_BUFLEN]; virMacAddrFormat(ifaceMac, ifmac); if (ifaceBand && ifaceBand->in && ifaceBand->in->floor && !(netBand && netBand->in)) { virReportError(VIR_ERR_OPERATION_UNSUPPORTED, _("Invalid use of 'floor' on interface with MAC " "address %s - network '%s' has no inbound QoS set"), ifmac, def->name); return -1; } if (!netBand || !netBand->in) { VIR_DEBUG("No network bandwidth controls present"); /* no QoS required, claim success */ return 1; } if (((!ifaceBand || !ifaceBand->in || !ifaceBand->in->floor) && (!oldBandwidth || !oldBandwidth->in || !oldBandwidth->in->floor))) { VIR_DEBUG("No old/new interface bandwidth floor"); /* no QoS required, claim success */ return 1; } tmp_new_rate = netBand->in->average; if (oldBandwidth && oldBandwidth->in) tmp_floor_sum -= oldBandwidth->in->floor; if (ifaceBand && ifaceBand->in) tmp_floor_sum += ifaceBand->in->floor; /* check against peak */ if (netBand->in->peak) { tmp_new_rate = netBand->in->peak; if (tmp_floor_sum > netBand->in->peak) { virReportError(VIR_ERR_OPERATION_INVALID, _("Cannot plug '%s' interface into '%s' because " "new combined inbound floor=%llu would overcommit " "peak=%llu on network '%s'"), ifmac, def->bridge, tmp_floor_sum, netBand->in->peak, def->name); goto cleanup; } } else if (tmp_floor_sum > netBand->in->average) { /* tmp_floor_sum can be between 'average' and 'peak' iff 'peak' is set. * Otherwise, tmp_floor_sum must be below 'average'. */ virReportError(VIR_ERR_OPERATION_INVALID, _("Cannot plug '%s' interface into '%s' because " "new combined inbound floor=%llu would overcommit " "average=%llu on network '%s'"), ifmac, def->bridge, tmp_floor_sum, netBand->in->average, def->name); goto cleanup; } if (new_rate) *new_rate = tmp_new_rate; ret = 0; cleanup: return ret; } /** * networkNextClassID: * @net: network object * * Find next free class ID. @net is supposed * to be locked already. If there is a free ID, * it is marked as used and returned. * * Returns next free class ID or -1 if none is available. */ static ssize_t networkNextClassID(virNetworkObjPtr obj) { ssize_t ret = 0; virBitmapPtr classIdMap = virNetworkObjGetClassIdMap(obj); if ((ret = virBitmapNextClearBit(classIdMap, -1)) < 0) ret = virBitmapSize(classIdMap); if (virBitmapSetBitExpand(classIdMap, ret) < 0) return -1; return ret; } static int networkPlugBandwidthImpl(virNetworkObjPtr obj, virMacAddrPtr mac, virNetDevBandwidthPtr ifaceBand, unsigned int *class_id, unsigned long long new_rate) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkDefPtr def = virNetworkObjGetDef(obj); virBitmapPtr classIdMap = virNetworkObjGetClassIdMap(obj); unsigned long long tmp_floor_sum = virNetworkObjGetFloorSum(obj); ssize_t next_id = 0; int plug_ret; int ret = -1; /* generate new class_id */ if ((next_id = networkNextClassID(obj)) < 0) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Could not generate next class ID")); goto cleanup; } plug_ret = virNetDevBandwidthPlug(def->bridge, def->bandwidth, mac, ifaceBand, next_id); if (plug_ret < 0) { ignore_value(virNetDevBandwidthUnplug(def->bridge, next_id)); goto cleanup; } /* QoS was set, generate new class ID */ *class_id = next_id; /* update sum of 'floor'-s of attached NICs */ tmp_floor_sum += ifaceBand->in->floor; virNetworkObjSetFloorSum(obj, tmp_floor_sum); /* update status file */ if (virNetworkObjSaveStatus(driver->stateDir, obj, network_driver->xmlopt) < 0) { ignore_value(virBitmapClearBit(classIdMap, next_id)); tmp_floor_sum -= ifaceBand->in->floor; virNetworkObjSetFloorSum(obj, tmp_floor_sum); *class_id = 0; ignore_value(virNetDevBandwidthUnplug(def->bridge, next_id)); goto cleanup; } /* update rate for non guaranteed NICs */ new_rate -= tmp_floor_sum; if (virNetDevBandwidthUpdateRate(def->bridge, 2, def->bandwidth, new_rate) < 0) VIR_WARN("Unable to update rate for 1:2 class on %s bridge", def->bridge); ret = 0; cleanup: return ret; } static int networkPlugBandwidth(virNetworkObjPtr obj, virMacAddrPtr mac, virNetDevBandwidthPtr ifaceBand, unsigned int *class_id) { int ret = -1; int plug_ret; unsigned long long new_rate = 0; char ifmac[VIR_MAC_STRING_BUFLEN]; if ((plug_ret = networkCheckBandwidth(obj, ifaceBand, NULL, mac, &new_rate)) < 0) { /* helper reported error */ goto cleanup; } if (plug_ret > 0) { /* no QoS needs to be set; claim success */ ret = 0; goto cleanup; } virMacAddrFormat(mac, ifmac); if (networkPlugBandwidthImpl(obj, mac, ifaceBand, class_id, new_rate) < 0) goto cleanup; ret = 0; cleanup: return ret; } static int networkUnplugBandwidth(virNetworkObjPtr obj, virNetDevBandwidthPtr ifaceBand, unsigned int *class_id) { virNetworkDefPtr def = virNetworkObjGetDef(obj); virBitmapPtr classIdMap = virNetworkObjGetClassIdMap(obj); unsigned long long tmp_floor_sum = virNetworkObjGetFloorSum(obj); virNetworkDriverStatePtr driver = networkGetDriver(); int ret = 0; unsigned long long new_rate; if (class_id && *class_id) { if (!def->bandwidth || !def->bandwidth->in) { VIR_WARN("Network %s has no bandwidth but unplug requested", def->name); goto cleanup; } /* we must remove class from bridge */ new_rate = def->bandwidth->in->average; if (def->bandwidth->in->peak > 0) new_rate = def->bandwidth->in->peak; ret = virNetDevBandwidthUnplug(def->bridge, *class_id); if (ret < 0) goto cleanup; /* update sum of 'floor'-s of attached NICs */ tmp_floor_sum -= ifaceBand->in->floor; virNetworkObjSetFloorSum(obj, tmp_floor_sum); /* return class ID */ ignore_value(virBitmapClearBit(classIdMap, *class_id)); /* update status file */ if (virNetworkObjSaveStatus(driver->stateDir, obj, network_driver->xmlopt) < 0) { tmp_floor_sum += ifaceBand->in->floor; virNetworkObjSetFloorSum(obj, tmp_floor_sum); ignore_value(virBitmapSetBit(classIdMap, *class_id)); goto cleanup; } /* update rate for non guaranteed NICs */ new_rate -= tmp_floor_sum; if (virNetDevBandwidthUpdateRate(def->bridge, 2, def->bandwidth, new_rate) < 0) VIR_WARN("Unable to update rate for 1:2 class on %s bridge", def->bridge); /* no class is associated any longer */ *class_id = 0; } cleanup: return ret; } static void networkNetworkObjTaint(virNetworkObjPtr obj, virNetworkTaintFlags taint) { virNetworkDefPtr def = virNetworkObjGetDef(obj); if (virNetworkObjTaint(obj, taint)) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(def->uuid, uuidstr); VIR_WARN("Network name='%s' uuid=%s is tainted: %s", def->name, uuidstr, virNetworkTaintTypeToString(taint)); } } static int networkUpdatePortBandwidth(virNetworkObjPtr obj, virMacAddrPtr mac, unsigned int *class_id, virNetDevBandwidthPtr oldBandwidth, virNetDevBandwidthPtr newBandwidth) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkDefPtr def; unsigned long long tmp_floor_sum; unsigned long long new_rate = 0; unsigned long long old_floor, new_floor; int plug_ret; old_floor = new_floor = 0; if (oldBandwidth && oldBandwidth->in) old_floor = oldBandwidth->in->floor; if (newBandwidth && newBandwidth->in) new_floor = newBandwidth->in->floor; if (new_floor == old_floor) return 0; def = virNetworkObjGetDef(obj); if ((plug_ret = networkCheckBandwidth(obj, newBandwidth, oldBandwidth, mac, &new_rate)) < 0) { /* helper reported error */ return -1; } if (plug_ret > 0) { /* no QoS needs to be set; claim success */ return 0; } /* Okay, there are three possible scenarios: */ if (oldBandwidth && oldBandwidth->in && oldBandwidth->in->floor && newBandwidth->in && newBandwidth->in->floor) { /* Either we just need to update @floor .. */ if (virNetDevBandwidthUpdateRate(def->bridge, *class_id, def->bandwidth, newBandwidth->in->floor) < 0) return -1; tmp_floor_sum = virNetworkObjGetFloorSum(obj); tmp_floor_sum -= oldBandwidth->in->floor; tmp_floor_sum += newBandwidth->in->floor; virNetworkObjSetFloorSum(obj, tmp_floor_sum); new_rate -= tmp_floor_sum; if (virNetDevBandwidthUpdateRate(def->bridge, 2, def->bandwidth, new_rate) < 0 || virNetworkObjSaveStatus(driver->stateDir, obj, network_driver->xmlopt) < 0) { /* Ouch, rollback */ tmp_floor_sum -= newBandwidth->in->floor; tmp_floor_sum += oldBandwidth->in->floor; virNetworkObjSetFloorSum(obj, tmp_floor_sum); ignore_value(virNetDevBandwidthUpdateRate(def->bridge, *class_id, def->bandwidth, oldBandwidth->in->floor)); return -1; } } else if (newBandwidth->in && newBandwidth->in->floor) { /* .. or we need to plug in new .. */ if (networkPlugBandwidthImpl(obj, mac, newBandwidth, class_id, new_rate) < 0) return -1; } else { /* .. or unplug old. */ if (networkUnplugBandwidth(obj, oldBandwidth, class_id) < 0) return -1; } return 0; } static virNetworkPortPtr networkPortLookupByUUID(virNetworkPtr net, const unsigned char *uuid) { virNetworkObjPtr obj; virNetworkDefPtr def; virNetworkPortDefPtr portdef = NULL; virNetworkPortPtr ret = NULL; char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(uuid, uuidstr); if (!(obj = networkObjFromNetwork(net))) return ret; def = virNetworkObjGetDef(obj); if (!(portdef = virNetworkObjLookupPort(obj, uuid))) goto cleanup; if (virNetworkPortLookupByUUIDEnsureACL(net->conn, def, portdef) < 0) goto cleanup; if (!virNetworkObjIsActive(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, _("network '%s' is not active"), def->name); goto cleanup; } ret = virGetNetworkPort(net, uuid); cleanup: virNetworkObjEndAPI(&obj); return ret; } static virNetworkPortPtr networkPortCreateXML(virNetworkPtr net, const char *xmldesc, unsigned int flags) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkObjPtr obj; virNetworkDefPtr def; g_autoptr(virNetworkPortDef) portdef = NULL; virNetworkPortPtr ret = NULL; int rc; virCheckFlags(VIR_NETWORK_PORT_CREATE_RECLAIM, NULL); if (!(obj = networkObjFromNetwork(net))) return ret; def = virNetworkObjGetDef(obj); if (!(portdef = virNetworkPortDefParseString(xmldesc))) goto cleanup; if (virNetworkPortCreateXMLEnsureACL(net->conn, def, portdef) < 0) goto cleanup; if (!virNetworkObjIsActive(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, _("network '%s' is not active"), def->name); goto cleanup; } if (portdef->plugtype == VIR_NETWORK_PORT_PLUG_TYPE_NONE) { if (flags & VIR_NETWORK_PORT_CREATE_RECLAIM) { virReportError(VIR_ERR_INVALID_ARG, "%s", _("Port reclaim requested but plug type is none")); goto cleanup; } } else { if (!(flags & VIR_NETWORK_PORT_CREATE_RECLAIM)) { virReportError(VIR_ERR_INVALID_ARG, "%s", _("Port reclaim not requested but plug type is not none")); goto cleanup; } } if (flags & VIR_NETWORK_PORT_CREATE_RECLAIM) rc = networkNotifyPort(obj, portdef); else rc = networkAllocatePort(obj, portdef); if (rc < 0) goto cleanup; if (virNetworkObjAddPort(obj, portdef, driver->stateDir) < 0) { virErrorPtr save_err; virErrorPreserveLast(&save_err); ignore_value(networkReleasePort(obj, portdef)); virErrorRestore(&save_err); goto cleanup; } ret = virGetNetworkPort(net, portdef->uuid); portdef = NULL; cleanup: virNetworkObjEndAPI(&obj); return ret; } static char * networkPortGetXMLDesc(virNetworkPortPtr port, unsigned int flags) { virNetworkObjPtr obj; virNetworkDefPtr def; virNetworkPortDefPtr portdef = NULL; char *ret = NULL; virCheckFlags(0, NULL); if (!(obj = networkObjFromNetwork(port->net))) return ret; def = virNetworkObjGetDef(obj); if (!(portdef = virNetworkObjLookupPort(obj, port->uuid))) goto cleanup; if (virNetworkPortGetXMLDescEnsureACL(port->net->conn, def, portdef) < 0) goto cleanup; if (!virNetworkObjIsActive(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, _("network '%s' is not active"), def->name); goto cleanup; } if (!(ret = virNetworkPortDefFormat(portdef))) goto cleanup; cleanup: virNetworkObjEndAPI(&obj); return ret; } static int networkPortDelete(virNetworkPortPtr port, unsigned int flags) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkObjPtr obj; virNetworkDefPtr def; virNetworkPortDefPtr portdef; int ret = -1; virCheckFlags(0, -1); if (!(obj = networkObjFromNetwork(port->net))) return ret; def = virNetworkObjGetDef(obj); if (!(portdef = virNetworkObjLookupPort(obj, port->uuid))) goto cleanup; if (virNetworkPortDeleteEnsureACL(port->net->conn, def, portdef) < 0) goto cleanup; if (!virNetworkObjIsActive(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, _("network '%s' is not active"), def->name); goto cleanup; } if (networkReleasePort(obj, portdef) < 0) goto cleanup; virNetworkObjDeletePort(obj, port->uuid, driver->stateDir); ret = 0; cleanup: virNetworkObjEndAPI(&obj); return ret; } static int networkPortSetParameters(virNetworkPortPtr port, virTypedParameterPtr params, int nparams, unsigned int flags) { virNetworkDriverStatePtr driver = networkGetDriver(); virNetworkObjPtr obj; virNetworkDefPtr def; virNetworkPortDefPtr portdef; virNetDevBandwidthPtr bandwidth = NULL; char *dir = NULL; int ret = -1; size_t i; virCheckFlags(0, -1); if (!(obj = networkObjFromNetwork(port->net))) return ret; def = virNetworkObjGetDef(obj); if (!(portdef = virNetworkObjLookupPort(obj, port->uuid))) goto cleanup; if (virNetworkPortSetParametersEnsureACL(port->net->conn, def, portdef) < 0) goto cleanup; if (!virNetworkObjIsActive(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, _("network '%s' is not active"), def->name); goto cleanup; } if (!(dir = virNetworkObjGetPortStatusDir(obj, driver->stateDir))) goto cleanup; if ((VIR_ALLOC(bandwidth) < 0) || (VIR_ALLOC(bandwidth->in) < 0) || (VIR_ALLOC(bandwidth->out) < 0)) goto cleanup; for (i = 0; i < nparams; i++) { virTypedParameterPtr param = ¶ms[i]; if (STREQ(param->field, VIR_NETWORK_PORT_BANDWIDTH_IN_AVERAGE)) { bandwidth->in->average = param->value.ui; } else if (STREQ(param->field, VIR_NETWORK_PORT_BANDWIDTH_IN_PEAK)) { bandwidth->in->peak = param->value.ui; } else if (STREQ(param->field, VIR_NETWORK_PORT_BANDWIDTH_IN_BURST)) { bandwidth->in->burst = param->value.ui; } else if (STREQ(param->field, VIR_NETWORK_PORT_BANDWIDTH_IN_FLOOR)) { bandwidth->in->floor = param->value.ui; } else if (STREQ(param->field, VIR_NETWORK_PORT_BANDWIDTH_OUT_AVERAGE)) { bandwidth->out->average = param->value.ui; } else if (STREQ(param->field, VIR_NETWORK_PORT_BANDWIDTH_OUT_PEAK)) { bandwidth->out->peak = param->value.ui; } else if (STREQ(param->field, VIR_NETWORK_PORT_BANDWIDTH_OUT_BURST)) { bandwidth->out->burst = param->value.ui; } } /* average or floor are mandatory, peak and burst are optional. * So if no average or floor is given, we free inbound/outbound * here which causes inbound/outbound to not be set. */ if (!bandwidth->in->average && !bandwidth->in->floor) VIR_FREE(bandwidth->in); if (!bandwidth->out->average) VIR_FREE(bandwidth->out); if (networkUpdatePortBandwidth(obj, &portdef->mac, &portdef->class_id, portdef->bandwidth, bandwidth) < 0) goto cleanup; virNetDevBandwidthFree(portdef->bandwidth); portdef->bandwidth = bandwidth; bandwidth = NULL; if (virNetworkPortDefSaveStatus(portdef, dir) < 0) goto cleanup; ret = 0; cleanup: virNetDevBandwidthFree(bandwidth); virNetworkObjEndAPI(&obj); VIR_FREE(dir); return ret; } static int networkPortGetParameters(virNetworkPortPtr port, virTypedParameterPtr *params, int *nparams, unsigned int flags) { virNetworkObjPtr obj; virNetworkDefPtr def; virNetworkPortDefPtr portdef; int maxparams = 0; int ret = -1; virCheckFlags(0, -1); *params = NULL; *nparams = 0; if (!(obj = networkObjFromNetwork(port->net))) return ret; def = virNetworkObjGetDef(obj); if (!(portdef = virNetworkObjLookupPort(obj, port->uuid))) goto cleanup; if (virNetworkPortGetParametersEnsureACL(port->net->conn, def, portdef) < 0) goto cleanup; if (!virNetworkObjIsActive(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, _("network '%s' is not active"), def->name); goto cleanup; } if (portdef->bandwidth) { if ((portdef->bandwidth->in != NULL) && (virTypedParamsAddUInt(params, nparams, &maxparams, VIR_NETWORK_PORT_BANDWIDTH_IN_AVERAGE, portdef->bandwidth->in->average) < 0 || virTypedParamsAddUInt(params, nparams, &maxparams, VIR_NETWORK_PORT_BANDWIDTH_IN_PEAK, portdef->bandwidth->in->peak) < 0 || virTypedParamsAddUInt(params, nparams, &maxparams, VIR_NETWORK_PORT_BANDWIDTH_IN_FLOOR, portdef->bandwidth->in->floor) < 0 || virTypedParamsAddUInt(params, nparams, &maxparams, VIR_NETWORK_PORT_BANDWIDTH_IN_BURST, portdef->bandwidth->in->burst) < 0)) goto cleanup; if ((portdef->bandwidth->out != NULL) && (virTypedParamsAddUInt(params, nparams, &maxparams, VIR_NETWORK_PORT_BANDWIDTH_OUT_AVERAGE, portdef->bandwidth->out->average) < 0 || virTypedParamsAddUInt(params, nparams, &maxparams, VIR_NETWORK_PORT_BANDWIDTH_OUT_PEAK, portdef->bandwidth->out->peak) < 0 || virTypedParamsAddUInt(params, nparams, &maxparams, VIR_NETWORK_PORT_BANDWIDTH_OUT_BURST, portdef->bandwidth->out->burst) < 0)) goto cleanup; } ret = 0; cleanup: virNetworkObjEndAPI(&obj); return ret; } static int networkListAllPorts(virNetworkPtr net, virNetworkPortPtr **ports, unsigned int flags) { virNetworkObjPtr obj; virNetworkDefPtr def; int ret = -1; virCheckFlags(0, -1); if (!(obj = networkObjFromNetwork(net))) return ret; def = virNetworkObjGetDef(obj); if (virNetworkListAllPortsEnsureACL(net->conn, def) < 0) goto cleanup; if (!virNetworkObjIsActive(obj)) { virReportError(VIR_ERR_OPERATION_INVALID, _("network '%s' is not active"), def->name); goto cleanup; } ret = virNetworkObjPortListExport(net, obj, ports, virNetworkListAllPortsCheckACL); cleanup: virNetworkObjEndAPI(&obj); return ret; } static virNetworkDriver networkDriver = { .name = "bridge", .connectNumOfNetworks = networkConnectNumOfNetworks, /* 0.2.0 */ .connectListNetworks = networkConnectListNetworks, /* 0.2.0 */ .connectNumOfDefinedNetworks = networkConnectNumOfDefinedNetworks, /* 0.2.0 */ .connectListDefinedNetworks = networkConnectListDefinedNetworks, /* 0.2.0 */ .connectListAllNetworks = networkConnectListAllNetworks, /* 0.10.2 */ .connectNetworkEventRegisterAny = networkConnectNetworkEventRegisterAny, /* 1.2.1 */ .connectNetworkEventDeregisterAny = networkConnectNetworkEventDeregisterAny, /* 1.2.1 */ .networkLookupByUUID = networkLookupByUUID, /* 0.2.0 */ .networkLookupByName = networkLookupByName, /* 0.2.0 */ .networkCreateXML = networkCreateXML, /* 0.2.0 */ .networkDefineXML = networkDefineXML, /* 0.2.0 */ .networkUndefine = networkUndefine, /* 0.2.0 */ .networkUpdate = networkUpdate, /* 0.10.2 */ .networkCreate = networkCreate, /* 0.2.0 */ .networkDestroy = networkDestroy, /* 0.2.0 */ .networkGetXMLDesc = networkGetXMLDesc, /* 0.2.0 */ .networkGetBridgeName = networkGetBridgeName, /* 0.2.0 */ .networkGetAutostart = networkGetAutostart, /* 0.2.1 */ .networkSetAutostart = networkSetAutostart, /* 0.2.1 */ .networkIsActive = networkIsActive, /* 0.7.3 */ .networkIsPersistent = networkIsPersistent, /* 0.7.3 */ .networkGetDHCPLeases = networkGetDHCPLeases, /* 1.2.6 */ .networkPortLookupByUUID = networkPortLookupByUUID, /* 5.5.0 */ .networkPortCreateXML = networkPortCreateXML, /* 5.5.0 */ .networkPortGetXMLDesc = networkPortGetXMLDesc, /* 5.5.0 */ .networkPortDelete = networkPortDelete, /* 5.5.0 */ .networkListAllPorts = networkListAllPorts, /* 5.5.0 */ .networkPortGetParameters = networkPortGetParameters, /* 5.5.0 */ .networkPortSetParameters = networkPortSetParameters, /* 5.5.0 */ }; static virHypervisorDriver networkHypervisorDriver = { .name = "network", .connectOpen = networkConnectOpen, /* 4.1.0 */ .connectClose = networkConnectClose, /* 4.1.0 */ .connectIsEncrypted = networkConnectIsEncrypted, /* 4.1.0 */ .connectIsSecure = networkConnectIsSecure, /* 4.1.0 */ .connectIsAlive = networkConnectIsAlive, /* 4.1.0 */ }; static virConnectDriver networkConnectDriver = { .localOnly = true, .uriSchemes = (const char *[]){ "network", NULL }, .hypervisorDriver = &networkHypervisorDriver, .networkDriver = &networkDriver, }; static virStateDriver networkStateDriver = { .name = "bridge", .stateInitialize = networkStateInitialize, .stateCleanup = networkStateCleanup, .stateReload = networkStateReload, }; int networkRegister(void) { if (virRegisterConnectDriver(&networkConnectDriver, false) < 0) return -1; if (virSetSharedNetworkDriver(&networkDriver) < 0) return -1; if (virRegisterStateDriver(&networkStateDriver) < 0) return -1; return 0; }