#define NETWORK_STATE_DIR LOCALSTATEDIR "/lib/libvirt/network"
#define DNSMASQ_STATE_DIR LOCALSTATEDIR "/lib/libvirt/dnsmasq"
+#define RADVD_STATE_DIR LOCALSTATEDIR "/lib/libvirt/radvd"
#define VIR_FROM_THIS VIR_FROM_NETWORK
static struct network_driver *driverState = NULL;
+static char *
+networkRadvdPidfileBasename(const char *netname)
+{
+ /* this is simple but we want to be sure it's consistently done */
+ char *pidfilebase;
+
+ virAsprintf(&pidfilebase, "%s-radvd", netname);
+ return pidfilebase;
+}
+
+static char *
+networkRadvdConfigFileName(const char *netname)
+{
+ char *configfile;
+
+ virAsprintf(&configfile, RADVD_STATE_DIR "/%s-radvd.conf",
+ netname);
+ return configfile;
+}
static void
networkFindActiveConfigs(struct network_driver *driver) {
brHasBridge(driver->brctl, obj->def->bridge) == 0) {
obj->active = 1;
- /* Finally try and read dnsmasq pid if any */
- if (obj->def->ips && (obj->def->nips > 0) &&
- virFileReadPid(NETWORK_PID_DIR, obj->def->name,
- &obj->dnsmasqPid) == 0) {
-
- /* Check its still alive */
- if (kill(obj->dnsmasqPid, 0) != 0)
- obj->dnsmasqPid = -1;
-
-#ifdef __linux__
- char *pidpath;
+ /* Try and read dnsmasq/radvd pids if any */
+ if (obj->def->ips && (obj->def->nips > 0)) {
+ char *pidpath, *radvdpidbase;
+
+ if (virFileReadPid(NETWORK_PID_DIR, obj->def->name,
+ &obj->dnsmasqPid) == 0) {
+ /* Check that it's still alive */
+ if (kill(obj->dnsmasqPid, 0) != 0)
+ obj->dnsmasqPid = -1;
+ if (virAsprintf(&pidpath, "/proc/%d/exe", obj->dnsmasqPid) < 0) {
+ virReportOOMError();
+ goto cleanup;
+ }
+ if (virFileLinkPointsTo(pidpath, DNSMASQ) == 0)
+ obj->dnsmasqPid = -1;
+ VIR_FREE(pidpath);
+ }
- if (virAsprintf(&pidpath, "/proc/%d/exe", obj->dnsmasqPid) < 0) {
+ if (!(radvdpidbase = networkRadvdPidfileBasename(obj->def->name))) {
virReportOOMError();
goto cleanup;
}
- if (virFileLinkPointsTo(pidpath, DNSMASQ) == 0)
- obj->dnsmasqPid = -1;
- VIR_FREE(pidpath);
-#endif
+ if (virFileReadPid(NETWORK_PID_DIR, radvdpidbase,
+ &obj->radvdPid) == 0) {
+ /* Check that it's still alive */
+ if (kill(obj->radvdPid, 0) != 0)
+ obj->radvdPid = -1;
+ if (virAsprintf(&pidpath, "/proc/%d/exe", obj->radvdPid) < 0) {
+ virReportOOMError();
+ VIR_FREE(radvdpidbase);
+ goto cleanup;
+ }
+ if (virFileLinkPointsTo(pidpath, RADVD) == 0)
+ obj->radvdPid = -1;
+ VIR_FREE(pidpath);
+ }
+ VIR_FREE(radvdpidbase);
}
}
return ret;
}
+static int
+networkStartRadvd(virNetworkObjPtr network)
+{
+ char *pidfile = NULL;
+ char *radvdpidbase = NULL;
+ virBuffer configbuf = VIR_BUFFER_INITIALIZER;;
+ char *configstr = NULL;
+ char *configfile = NULL;
+ virCommandPtr cmd = NULL;
+ int ret = -1, err, ii;
+ virNetworkIpDefPtr ipdef;
+
+ network->radvdPid = -1;
+
+ if ((err = virFileMakePath(NETWORK_PID_DIR)) != 0) {
+ virReportSystemError(err,
+ _("cannot create directory %s"),
+ NETWORK_PID_DIR);
+ goto cleanup;
+ }
+ if ((err = virFileMakePath(RADVD_STATE_DIR)) != 0) {
+ virReportSystemError(err,
+ _("cannot create directory %s"),
+ RADVD_STATE_DIR);
+ goto cleanup;
+ }
+
+ /* construct pidfile name */
+ if (!(radvdpidbase = networkRadvdPidfileBasename(network->def->name))) {
+ virReportOOMError();
+ goto cleanup;
+ }
+ if (!(pidfile = virFilePid(NETWORK_PID_DIR, radvdpidbase))) {
+ virReportOOMError();
+ goto cleanup;
+ }
+
+ /* create radvd config file appropriate for this network */
+ virBufferVSprintf(&configbuf, "interface %s\n"
+ "{\n"
+ " AdvSendAdvert on;\n"
+ " AdvManagedFlag off;\n"
+ " AdvOtherConfigFlag off;\n"
+ "\n",
+ network->def->bridge);
+ for (ii = 0;
+ (ipdef = virNetworkDefGetIpByIndex(network->def, AF_INET6, ii));
+ ii++) {
+ int prefix;
+ char *netaddr;
+
+ prefix = virNetworkIpDefPrefix(ipdef);
+ if (prefix < 0) {
+ networkReportError(VIR_ERR_INTERNAL_ERROR,
+ _("bridge '%s' has an invalid prefix"),
+ network->def->bridge);
+ goto cleanup;
+ }
+ if (!(netaddr = virSocketFormatAddr(&ipdef->address)))
+ goto cleanup;
+ virBufferVSprintf(&configbuf,
+ " prefix %s/%d\n"
+ " {\n"
+ " AdvOnLink on;\n"
+ " AdvAutonomous on;\n"
+ " AdvRouterAddr off;\n"
+ " };\n",
+ netaddr, prefix);
+ VIR_FREE(netaddr);
+ }
+
+ virBufferAddLit(&configbuf, "};\n");
+
+ if (virBufferError(&configbuf)) {
+ virReportOOMError();
+ goto cleanup;
+ }
+ if (!(configstr = virBufferContentAndReset(&configbuf))) {
+ virReportOOMError();
+ goto cleanup;
+ }
+
+ /* construct the filename */
+ if (!(configfile = networkRadvdConfigFileName(network->def->name))) {
+ virReportOOMError();
+ goto cleanup;
+ }
+ /* write the file */
+ if (virFileWriteStr(configfile, configstr, 0600) < 0) {
+ virReportSystemError(errno,
+ _("couldn't write radvd config file '%s'"),
+ configfile);
+ 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
+ * virFileReadPid() 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 (virFileReadPid(NETWORK_PID_DIR, radvdpidbase,
+ &network->radvdPid) < 0)
+ goto cleanup;
+
+ ret = 0;
+cleanup:
+ virCommandFree(cmd);
+ VIR_FREE(configfile);
+ VIR_FREE(configstr);
+ virBufferFreeAndReset(&configbuf);
+ VIR_FREE(radvdpidbase);
+ VIR_FREE(pidfile);
+ return ret;
+}
+
static int
networkAddMasqueradingIptablesRules(struct network_driver *driver,
virNetworkObjPtr network,
/* Enable IP Forwarding. Return 0 for success, -1 for failure. */
static int
-networkEnableIpForwarding(void)
+networkEnableIpForwarding(bool enableIPv4, bool enableIPv6)
{
- return virFileWriteStr("/proc/sys/net/ipv4/ip_forward", "1\n", 0);
+ int ret = 0;
+ if (enableIPv4)
+ ret = virFileWriteStr("/proc/sys/net/ipv4/ip_forward", "1\n", 0);
+ if (enableIPv6 && ret == 0)
+ ret = virFileWriteStr("/proc/sys/net/ipv6/conf/all/forwarding", "1\n", 0);
+ return ret;
}
#define SYSCTL_PATH "/proc/sys"
/* If forwardType != NONE, turn on global IP forwarding */
if (network->def->forwardType != VIR_NETWORK_FORWARD_NONE &&
- networkEnableIpForwarding() < 0) {
+ networkEnableIpForwarding(v4present, v6present) < 0) {
virReportSystemError(errno, "%s",
_("failed to enable IP forwarding"));
goto err3;
if (v4present && networkStartDhcpDaemon(network) < 0)
goto err3;
+ /* start radvd if there are any ipv6 addresses */
+ if (v6present && networkStartRadvd(network) < 0)
+ goto err4;
+
/* Persist the live configuration now we have bridge info */
if (virNetworkSaveConfig(NETWORK_STATE_DIR, network->def) < 0) {
- goto err4;
+ goto err5;
}
network->active = 1;
return 0;
+ err5:
+ if (!save_err)
+ save_err = virSaveLastError();
+
+ if (network->radvdPid > 0) {
+ kill(network->radvdPid, SIGTERM);
+ network->radvdPid = -1;
+ }
+
err4:
if (!save_err)
save_err = virSaveLastError();
unlink(stateFile);
VIR_FREE(stateFile);
+ if (network->radvdPid > 0) {
+ char *radvdpidbase;
+
+ kill(network->radvdPid, SIGTERM);
+ /* attempt to delete the pidfile we created */
+ if (!(radvdpidbase = networkRadvdPidfileBasename(network->def->name))) {
+ virReportOOMError();
+ } else {
+ virFileDeletePid(NETWORK_PID_DIR, radvdpidbase);
+ VIR_FREE(radvdpidbase);
+ }
+ }
+
if (network->dnsmasqPid > 0)
kill(network->dnsmasqPid, SIGTERM);
if (network->dnsmasqPid > 0 &&
(kill(network->dnsmasqPid, 0) == 0))
kill(network->dnsmasqPid, SIGKILL);
-
network->dnsmasqPid = -1;
+
+ if (network->radvdPid > 0 &&
+ (kill(network->radvdPid, 0) == 0))
+ kill(network->radvdPid, SIGKILL);
+ network->radvdPid = -1;
+
network->active = 0;
if (network->newDef) {
dnsmasqContextFree(dctx);
}
+ if (v6present) {
+ char *configfile = networkRadvdConfigFileName(network->def->name);
+
+ if (!configfile) {
+ virReportOOMError();
+ goto cleanup;
+ }
+ unlink(configfile);
+ VIR_FREE(configfile);
+
+ char *radvdpidbase = networkRadvdPidfileBasename(network->def->name);
+
+ if (!(radvdpidbase)) {
+ virReportOOMError();
+ goto cleanup;
+ }
+ virFileDeletePid(NETWORK_PID_DIR, radvdpidbase);
+ VIR_FREE(radvdpidbase);
+
+ }
+
virNetworkRemoveInactive(&driver->networks,
network);
network = NULL;
projects / libvirt.git / commitdiff