-/* Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <config.h>
-
-#include <asm/param.h>
-#include <assert.h>
-#include <errno.h>
-#include <getopt.h>
-#include <inttypes.h>
-#include <limits.h>
-#include <net/if.h>
-#include <linux/genetlink.h>
-#include <linux/rtnetlink.h>
-#include <signal.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
-#include <time.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include "command-line.h"
-#include "coverage.h"
-#include "daemon.h"
-#include "dirs.h"
-#include "dynamic-string.h"
-#include "fatal-signal.h"
-#include "json.h"
-#include "leak-checker.h"
-#include "netdev.h"
-#include "netlink.h"
-#include "netlink-notifier.h"
-#include "netlink-socket.h"
-#include "ofpbuf.h"
-#include "openvswitch/brcompat-netlink.h"
-#include "packets.h"
-#include "poll-loop.h"
-#include "process.h"
-#include "rtnetlink-link.h"
-#include "signals.h"
-#include "sset.h"
-#include "svec.h"
-#include "timeval.h"
-#include "unixctl.h"
-#include "util.h"
-#include "vlog.h"
-
-VLOG_DEFINE_THIS_MODULE(brcompatd);
-
-/* xxx Just hangs if datapath is rmmod/insmod. Learn to reconnect? */
-
-static void parse_options(int argc, char *argv[]);
-static void usage(void) NO_RETURN;
-
-static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 60);
-
-/* --appctl: Absolute path to ovs-appctl. */
-static char *appctl_program;
-
-/* --vsctl: Absolute path to ovs-vsctl. */
-static char *vsctl_program;
-
-/* Options that we should generally pass to ovs-vsctl. */
-#define VSCTL_OPTIONS "--timeout=5", "-vconsole:warn"
-
-/* Netlink socket to bridge compatibility kernel module. */
-static struct nl_sock *brc_sock;
-
-/* The Generic Netlink family number used for bridge compatibility. */
-static int brc_family;
-
-static const struct nl_policy brc_multicast_policy[] = {
- [BRC_GENL_A_MC_GROUP] = {.type = NL_A_U32 }
-};
-
-static char *
-capture_vsctl_valist(const char *arg0, va_list args)
-{
- char *stdout_log, *stderr_log;
- enum vlog_level log_level;
- struct svec argv;
- int status;
- char *msg;
-
- /* Compose arguments. */
- svec_init(&argv);
- svec_add(&argv, arg0);
- for (;;) {
- const char *arg = va_arg(args, const char *);
- if (!arg) {
- break;
- }
- svec_add(&argv, arg);
- }
- svec_terminate(&argv);
-
- /* Run process. */
- if (process_run_capture(argv.names, &stdout_log, &stderr_log, SIZE_MAX,
- &status)) {
- svec_destroy(&argv);
- return NULL;
- }
-
- /* Log results. */
- if (WIFEXITED(status)) {
- int code = WEXITSTATUS(status);
- log_level = code == 0 ? VLL_DBG : code == 1 ? VLL_WARN : VLL_ERR;
- } else {
- log_level = VLL_ERR;
- }
- msg = process_status_msg(status);
- VLOG(log_level, "ovs-vsctl exited (%s)", msg);
- if (stdout_log && *stdout_log) {
- VLOG(log_level, "ovs-vsctl wrote to stdout:\n%s\n", stdout_log);
- }
- if (stderr_log && *stderr_log) {
- VLOG(log_level, "ovs-vsctl wrote to stderr:\n%s\n", stderr_log);
- }
- free(msg);
-
- svec_destroy(&argv);
-
- free(stderr_log);
- if (WIFEXITED(status) && !WEXITSTATUS(status)) {
- return stdout_log;
- } else {
- free(stdout_log);
- return NULL;
- }
-}
-
-static char * SENTINEL(0)
-capture_vsctl(const char *arg0, ...)
-{
- char *stdout_log;
- va_list args;
-
- va_start(args, arg0);
- stdout_log = capture_vsctl_valist(arg0, args);
- va_end(args);
-
- return stdout_log;
-}
-
-static bool SENTINEL(0)
-run_vsctl(const char *arg0, ...)
-{
- char *stdout_log;
- va_list args;
- bool ok;
-
- va_start(args, arg0);
- stdout_log = capture_vsctl_valist(arg0, args);
- va_end(args);
-
- ok = stdout_log != NULL;
- free(stdout_log);
- return ok;
-}
-
-static int
-lookup_brc_multicast_group(int *multicast_group)
-{
- struct nl_sock *sock;
- struct ofpbuf request, *reply;
- struct nlattr *attrs[ARRAY_SIZE(brc_multicast_policy)];
- int retval;
-
- retval = nl_sock_create(NETLINK_GENERIC, &sock);
- if (retval) {
- return retval;
- }
- ofpbuf_init(&request, 0);
- nl_msg_put_genlmsghdr(&request, 0, brc_family,
- NLM_F_REQUEST, BRC_GENL_C_QUERY_MC, 1);
- retval = nl_sock_transact(sock, &request, &reply);
- ofpbuf_uninit(&request);
- if (retval) {
- nl_sock_destroy(sock);
- return retval;
- }
- if (!nl_policy_parse(reply, NLMSG_HDRLEN + GENL_HDRLEN,
- brc_multicast_policy, attrs,
- ARRAY_SIZE(brc_multicast_policy))) {
- nl_sock_destroy(sock);
- ofpbuf_delete(reply);
- return EPROTO;
- }
- *multicast_group = nl_attr_get_u32(attrs[BRC_GENL_A_MC_GROUP]);
- nl_sock_destroy(sock);
- ofpbuf_delete(reply);
-
- return 0;
-}
-
-/* Opens a socket for brcompat notifications. Returns 0 if successful,
- * otherwise a positive errno value. */
-static int
-brc_open(struct nl_sock **sock)
-{
- int multicast_group = 0;
- int retval;
-
- retval = nl_lookup_genl_family(BRC_GENL_FAMILY_NAME, &brc_family);
- if (retval) {
- return retval;
- }
-
- retval = lookup_brc_multicast_group(&multicast_group);
- if (retval) {
- return retval;
- }
-
- retval = nl_sock_create(NETLINK_GENERIC, sock);
- if (retval) {
- return retval;
- }
-
- retval = nl_sock_join_mcgroup(*sock, multicast_group);
- if (retval) {
- nl_sock_destroy(*sock);
- *sock = NULL;
- }
- return retval;
-}
-
-static const struct nl_policy brc_dp_policy[] = {
- [BRC_GENL_A_DP_NAME] = { .type = NL_A_STRING },
-};
-
-static int
-parse_command(struct ofpbuf *buffer, uint32_t *seq, const char **br_name,
- const char **port_name, uint64_t *count, uint64_t *skip)
-{
- static const struct nl_policy policy[] = {
- [BRC_GENL_A_DP_NAME] = { .type = NL_A_STRING, .optional = true },
- [BRC_GENL_A_PORT_NAME] = { .type = NL_A_STRING, .optional = true },
- [BRC_GENL_A_FDB_COUNT] = { .type = NL_A_U64, .optional = true },
- [BRC_GENL_A_FDB_SKIP] = { .type = NL_A_U64, .optional = true },
- };
- struct nlattr *attrs[ARRAY_SIZE(policy)];
-
- if (!nl_policy_parse(buffer, NLMSG_HDRLEN + GENL_HDRLEN, policy,
- attrs, ARRAY_SIZE(policy))
- || (br_name && !attrs[BRC_GENL_A_DP_NAME])
- || (port_name && !attrs[BRC_GENL_A_PORT_NAME])
- || (count && !attrs[BRC_GENL_A_FDB_COUNT])
- || (skip && !attrs[BRC_GENL_A_FDB_SKIP])) {
- return EINVAL;
- }
-
- *seq = ((struct nlmsghdr *) buffer->data)->nlmsg_seq;
- if (br_name) {
- *br_name = nl_attr_get_string(attrs[BRC_GENL_A_DP_NAME]);
- }
- if (port_name) {
- *port_name = nl_attr_get_string(attrs[BRC_GENL_A_PORT_NAME]);
- }
- if (count) {
- *count = nl_attr_get_u64(attrs[BRC_GENL_A_FDB_COUNT]);
- }
- if (skip) {
- *skip = nl_attr_get_u64(attrs[BRC_GENL_A_FDB_SKIP]);
- }
- return 0;
-}
-
-/* Composes and returns a reply to a request made by the datapath with error
- * code 'error'. The caller may add additional attributes to the message, then
- * it may send it with send_reply(). */
-static struct ofpbuf *
-compose_reply(int error)
-{
- struct ofpbuf *reply = ofpbuf_new(4096);
- nl_msg_put_genlmsghdr(reply, 32, brc_family, NLM_F_REQUEST,
- BRC_GENL_C_DP_RESULT, 1);
- nl_msg_put_u32(reply, BRC_GENL_A_ERR_CODE, error);
- return reply;
-}
-
-/* Sends 'reply' to the datapath, using sequence number 'nlmsg_seq', and frees
- * it. */
-static void
-send_reply(struct ofpbuf *reply, uint32_t nlmsg_seq)
-{
- int retval = nl_sock_send_seq(brc_sock, reply, nlmsg_seq, false);
- if (retval) {
- VLOG_WARN_RL(&rl, "replying to brcompat request: %s",
- strerror(retval));
- }
- ofpbuf_delete(reply);
-}
-
-/* Composes and sends a reply to a request made by the datapath with Netlink
- * sequence number 'seq' and error code 'error'. */
-static void
-send_simple_reply(uint32_t seq, int error)
-{
- send_reply(compose_reply(error), seq);
-}
-
-static int
-handle_bridge_cmd(struct ofpbuf *buffer, bool add)
-{
- const char *br_name;
- uint32_t seq;
- int error;
-
- error = parse_command(buffer, &seq, &br_name, NULL, NULL, NULL);
- if (!error) {
- const char *vsctl_cmd = add ? "add-br" : "del-br";
- const char *brctl_cmd = add ? "addbr" : "delbr";
- if (!run_vsctl(vsctl_program, VSCTL_OPTIONS,
- "--", vsctl_cmd, br_name,
- "--", "comment", "ovs-brcompatd:", brctl_cmd, br_name,
- (char *) NULL)) {
- error = add ? EEXIST : ENXIO;
- }
- send_simple_reply(seq, error);
- }
- return error;
-}
-
-static const struct nl_policy brc_port_policy[] = {
- [BRC_GENL_A_DP_NAME] = { .type = NL_A_STRING },
- [BRC_GENL_A_PORT_NAME] = { .type = NL_A_STRING },
-};
-
-static int
-handle_port_cmd(struct ofpbuf *buffer, bool add)
-{
- const char *br_name, *port_name;
- uint32_t seq;
- int error;
-
- error = parse_command(buffer, &seq, &br_name, &port_name, NULL, NULL);
- if (!error) {
- const char *vsctl_cmd = add ? "add-port" : "del-port";
- const char *brctl_cmd = add ? "addif" : "delif";
- if (!run_vsctl(vsctl_program, VSCTL_OPTIONS,
- "--", vsctl_cmd, br_name, port_name,
- "--", "comment", "ovs-brcompatd:", brctl_cmd,
- br_name, port_name, (char *) NULL)) {
- error = EINVAL;
- }
- send_simple_reply(seq, error);
- }
- return error;
-}
-
-static char *
-linux_bridge_to_ovs_bridge(const char *linux_name, int *br_vlanp)
-{
- char *save_ptr = NULL;
- const char *br_name, *br_vlan;
- char *br_name_copy;
- char *output;
-
- output = capture_vsctl(vsctl_program, VSCTL_OPTIONS,
- "--", "br-to-parent", linux_name,
- "--", "br-to-vlan", linux_name,
- (char *) NULL);
- if (!output) {
- return NULL;
- }
-
- br_name = strtok_r(output, " \t\r\n", &save_ptr);
- br_vlan = strtok_r(NULL, " \t\r\n", &save_ptr);
- if (!br_name || !br_vlan) {
- free(output);
- return NULL;
- }
- br_name_copy = xstrdup(br_name);
- *br_vlanp = atoi(br_vlan);
-
- free(output);
-
- return br_name_copy;
-}
-
-static void
-get_bridge_ifaces(const char *br_name, struct sset *ifaces)
-{
- char *save_ptr = NULL;
- char *output;
- char *iface;
-
- output = capture_vsctl(vsctl_program, VSCTL_OPTIONS, "list-ifaces",
- br_name, (char *) NULL);
- if (!output) {
- return;
- }
-
- for (iface = strtok_r(output, " \t\r\n", &save_ptr); iface;
- iface = strtok_r(NULL, " \t\r\n", &save_ptr)) {
- sset_add(ifaces, iface);
- }
- free(output);
-}
-
-static int
-handle_fdb_query_cmd(struct ofpbuf *buffer)
-{
- /* This structure is copied directly from the Linux 2.6.30 header files.
- * It would be more straightforward to #include <linux/if_bridge.h>, but
- * the 'port_hi' member was only introduced in Linux 2.6.26 and so systems
- * with old header files won't have it. */
- struct __fdb_entry {
- __u8 mac_addr[6];
- __u8 port_no;
- __u8 is_local;
- __u32 ageing_timer_value;
- __u8 port_hi;
- __u8 pad0;
- __u16 unused;
- };
-
- struct mac {
- uint8_t addr[6];
- };
- struct mac *local_macs;
- int n_local_macs;
- int i;
-
- /* Impedance matching between the vswitchd and Linux kernel notions of what
- * a bridge is. The kernel only handles a single VLAN per bridge, but
- * vswitchd can deal with all the VLANs on a single bridge. We have to
- * pretend that the former is the case even though the latter is the
- * implementation. */
- const char *linux_name; /* Name used by brctl. */
- int br_vlan; /* VLAN tag. */
- struct sset ifaces;
-
- struct ofpbuf query_data;
- const char *iface_name;
- struct ofpbuf *reply;
- uint64_t count, skip;
- char *br_name;
- char *output;
- char *save_ptr;
- uint32_t seq;
- int error;
-
- /* Parse the command received from brcompat. */
- error = parse_command(buffer, &seq, &linux_name, NULL, &count, &skip);
- if (error) {
- return error;
- }
-
- /* Figure out vswitchd bridge and VLAN. */
- br_name = linux_bridge_to_ovs_bridge(linux_name, &br_vlan);
- if (!br_name) {
- error = EINVAL;
- send_simple_reply(seq, error);
- return error;
- }
-
- /* Fetch the forwarding database using ovs-appctl. */
- output = capture_vsctl(appctl_program, "fdb/show", br_name,
- (char *) NULL);
- if (!output) {
- error = ECHILD;
- send_simple_reply(seq, error);
- return error;
- }
-
- /* Fetch the MAC address for each interface on the bridge, so that we can
- * fill in the is_local field in the response. */
- sset_init(&ifaces);
- get_bridge_ifaces(linux_name, &ifaces);
- local_macs = xmalloc(sset_count(&ifaces) * sizeof *local_macs);
- n_local_macs = 0;
- SSET_FOR_EACH (iface_name, &ifaces) {
- struct mac *mac = &local_macs[n_local_macs];
- struct netdev *netdev;
-
- error = netdev_open(iface_name, "system", &netdev);
- if (!error) {
- if (!netdev_get_etheraddr(netdev, mac->addr)) {
- n_local_macs++;
- }
- netdev_close(netdev);
- }
- }
- sset_destroy(&ifaces);
-
- /* Parse the response from ovs-appctl and convert it to binary format to
- * pass back to the kernel. */
- ofpbuf_init(&query_data, sizeof(struct __fdb_entry) * 8);
- save_ptr = NULL;
- strtok_r(output, "\n", &save_ptr); /* Skip header line. */
- while (count > 0) {
- struct __fdb_entry *entry;
- int port, vlan, age;
- uint8_t mac[ETH_ADDR_LEN];
- char *line;
- bool is_local;
-
- line = strtok_r(NULL, "\n", &save_ptr);
- if (!line) {
- break;
- }
-
- if (sscanf(line, "%d %d "ETH_ADDR_SCAN_FMT" %d",
- &port, &vlan, ETH_ADDR_SCAN_ARGS(mac), &age)
- != 2 + ETH_ADDR_SCAN_COUNT + 1) {
- static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
- VLOG_INFO_RL(&rl, "fdb/show output has invalid format: %s", line);
- continue;
- }
-
- if (vlan != br_vlan) {
- continue;
- }
-
- if (skip > 0) {
- skip--;
- continue;
- }
-
- /* Is this the MAC address of an interface on the bridge? */
- is_local = false;
- for (i = 0; i < n_local_macs; i++) {
- if (eth_addr_equals(local_macs[i].addr, mac)) {
- is_local = true;
- break;
- }
- }
-
- entry = ofpbuf_put_uninit(&query_data, sizeof *entry);
- memcpy(entry->mac_addr, mac, ETH_ADDR_LEN);
- entry->port_no = port & 0xff;
- entry->is_local = is_local;
- entry->ageing_timer_value = age * HZ;
- entry->port_hi = (port & 0xff00) >> 8;
- entry->pad0 = 0;
- entry->unused = 0;
- count--;
- }
- free(output);
-
- /* Compose and send reply to datapath. */
- reply = compose_reply(0);
- nl_msg_put_unspec(reply, BRC_GENL_A_FDB_DATA,
- query_data.data, query_data.size);
- send_reply(reply, seq);
-
- /* Free memory. */
- ofpbuf_uninit(&query_data);
- free(local_macs);
-
- return 0;
-}
-
-static void
-send_ifindex_reply(uint32_t seq, char *output)
-{
- size_t allocated_indices;
- char *save_ptr = NULL;
- struct ofpbuf *reply;
- const char *iface;
- size_t n_indices;
- int *indices;
-
- indices = NULL;
- n_indices = allocated_indices = 0;
- for (iface = strtok_r(output, " \t\r\n", &save_ptr); iface;
- iface = strtok_r(NULL, " \t\r\n", &save_ptr)) {
- int ifindex;
-
- if (n_indices >= allocated_indices) {
- indices = x2nrealloc(indices, &allocated_indices, sizeof *indices);
- }
-
- ifindex = if_nametoindex(iface);
- if (ifindex) {
- indices[n_indices++] = ifindex;
- }
- }
-
- /* Compose and send reply. */
- reply = compose_reply(0);
- nl_msg_put_unspec(reply, BRC_GENL_A_IFINDEXES,
- indices, n_indices * sizeof *indices);
- send_reply(reply, seq);
-
- /* Free memory. */
- free(indices);
-}
-
-static int
-handle_get_bridges_cmd(struct ofpbuf *buffer)
-{
- char *output;
- uint32_t seq;
- int error;
-
- /* Parse Netlink command.
- *
- * The command doesn't actually have any arguments, but we need the
- * sequence number to send the reply. */
- error = parse_command(buffer, &seq, NULL, NULL, NULL, NULL);
- if (error) {
- return error;
- }
-
- output = capture_vsctl(vsctl_program, VSCTL_OPTIONS, "list-br", (char *) NULL);
- if (!output) {
- return ENODEV;
- }
-
- send_ifindex_reply(seq, output);
- free(output);
- return 0;
-}
-
-static int
-handle_get_ports_cmd(struct ofpbuf *buffer)
-{
- const char *linux_name;
- uint32_t seq;
- char *output;
- int error;
-
- /* Parse Netlink command. */
- error = parse_command(buffer, &seq, &linux_name, NULL, NULL, NULL);
- if (error) {
- return error;
- }
-
- output = capture_vsctl(vsctl_program, VSCTL_OPTIONS, "list-ports", linux_name,
- (char *) NULL);
- if (!output) {
- return ENODEV;
- }
-
- send_ifindex_reply(seq, output);
- free(output);
- return 0;
-}
-
-static bool
-brc_recv_update__(struct ofpbuf *buffer)
-{
- for (;;) {
- int retval = nl_sock_recv(brc_sock, buffer, false);
- switch (retval) {
- case 0:
- if (nl_msg_nlmsgerr(buffer, NULL)
- || nl_msg_nlmsghdr(buffer)->nlmsg_type == NLMSG_DONE) {
- break;
- }
- return true;
-
- case ENOBUFS:
- break;
-
- case EAGAIN:
- return false;
-
- default:
- VLOG_WARN_RL(&rl, "brc_recv_update: %s", strerror(retval));
- return false;
- }
- }
-}
-
-static void
-brc_recv_update(void)
-{
- struct genlmsghdr *genlmsghdr;
- uint64_t buffer_stub[1024 / 8];
- struct ofpbuf buffer;
-
- ofpbuf_use_stub(&buffer, buffer_stub, sizeof buffer_stub);
- if (!brc_recv_update__(&buffer)) {
- goto error;
- }
-
- genlmsghdr = nl_msg_genlmsghdr(&buffer);
- if (!genlmsghdr) {
- VLOG_WARN_RL(&rl, "received packet too short for generic NetLink");
- goto error;
- }
-
- if (nl_msg_nlmsghdr(&buffer)->nlmsg_type != brc_family) {
- VLOG_DBG_RL(&rl, "received type (%"PRIu16") != brcompat family (%d)",
- nl_msg_nlmsghdr(&buffer)->nlmsg_type, brc_family);
- goto error;
- }
-
- /* Service all pending network device notifications before executing the
- * command. This is very important to avoid a race in a scenario like the
- * following, which is what happens with XenServer Tools version 5.0.0
- * during boot of a Windows VM:
- *
- * 1. Create tap1.0 and vif1.0.
- * 2. Delete tap1.0.
- * 3. Delete vif1.0.
- * 4. Re-create vif1.0.
- *
- * We must process the network device notification from step 3 before we
- * process the brctl command from step 4. If we process them in the
- * reverse order, then step 4 completes as a no-op but step 3 then deletes
- * the port that was just added.
- *
- * (XenServer Tools 5.5.0 does not exhibit this behavior, and neither does
- * a VM without Tools installed at all.)
- */
- rtnetlink_link_run();
-
- switch (genlmsghdr->cmd) {
- case BRC_GENL_C_DP_ADD:
- handle_bridge_cmd(&buffer, true);
- break;
-
- case BRC_GENL_C_DP_DEL:
- handle_bridge_cmd(&buffer, false);
- break;
-
- case BRC_GENL_C_PORT_ADD:
- handle_port_cmd(&buffer, true);
- break;
-
- case BRC_GENL_C_PORT_DEL:
- handle_port_cmd(&buffer, false);
- break;
-
- case BRC_GENL_C_FDB_QUERY:
- handle_fdb_query_cmd(&buffer);
- break;
-
- case BRC_GENL_C_GET_BRIDGES:
- handle_get_bridges_cmd(&buffer);
- break;
-
- case BRC_GENL_C_GET_PORTS:
- handle_get_ports_cmd(&buffer);
- break;
-
- default:
- VLOG_WARN_RL(&rl, "received unknown brc netlink command: %d\n",
- genlmsghdr->cmd);
- break;
- }
-
-error:
- ofpbuf_uninit(&buffer);
-}
-
-static void
-netdev_changed_cb(const struct rtnetlink_link_change *change,
- void *aux OVS_UNUSED)
-{
- char br_name[IFNAMSIZ];
- const char *port_name;
-
- if (!change) {
- VLOG_WARN_RL(&rl, "network monitor socket overflowed");
- return;
- }
-
- if (change->nlmsg_type != RTM_DELLINK || !change->master_ifindex) {
- return;
- }
-
- port_name = change->ifname;
- if (!if_indextoname(change->master_ifindex, br_name)) {
- return;
- }
-
- VLOG_INFO("network device %s destroyed, removing from bridge %s",
- port_name, br_name);
-
- run_vsctl(vsctl_program, VSCTL_OPTIONS,
- "--", "--if-exists", "del-port", port_name,
- "--", "comment", "ovs-brcompatd:", port_name, "disappeared",
- (char *) NULL);
-}
-
-int
-main(int argc, char *argv[])
-{
- extern struct vlog_module VLM_reconnect;
- struct nln_notifier *link_notifier;
- struct unixctl_server *unixctl;
- int retval;
-
- proctitle_init(argc, argv);
- set_program_name(argv[0]);
- vlog_set_levels(&VLM_reconnect, VLF_ANY_FACILITY, VLL_WARN);
-
- VLOG_WARN("Bridge compatibility is deprecated and may be removed "
- "no earlier than February 2013");
- parse_options(argc, argv);
- signal(SIGPIPE, SIG_IGN);
- process_init();
-
- daemonize_start();
-
- retval = unixctl_server_create(NULL, &unixctl);
- if (retval) {
- exit(EXIT_FAILURE);
- }
-
- if (brc_open(&brc_sock)) {
- VLOG_FATAL("could not open brcompat socket. Check "
- "\"brcompat\" kernel module.");
- }
-
- link_notifier = rtnetlink_link_notifier_create(netdev_changed_cb, NULL);
-
- daemonize_complete();
-
- for (;;) {
- unixctl_server_run(unixctl);
- rtnetlink_link_run();
- brc_recv_update();
-
- netdev_run();
-
- nl_sock_wait(brc_sock, POLLIN);
- unixctl_server_wait(unixctl);
- rtnetlink_link_wait();
- netdev_wait();
- poll_block();
- }
-
- rtnetlink_link_notifier_destroy(link_notifier);
-
- return 0;
-}
-
-static void
-parse_options(int argc, char *argv[])
-{
- enum {
- OPT_APPCTL,
- OPT_VSCTL,
- VLOG_OPTION_ENUMS,
- LEAK_CHECKER_OPTION_ENUMS,
- DAEMON_OPTION_ENUMS
- };
- static struct option long_options[] = {
- {"help", no_argument, NULL, 'h'},
- {"version", no_argument, NULL, 'V'},
- {"appctl", required_argument, NULL, OPT_APPCTL},
- {"vsctl", required_argument, NULL, OPT_VSCTL},
- DAEMON_LONG_OPTIONS,
- VLOG_LONG_OPTIONS,
- LEAK_CHECKER_LONG_OPTIONS,
- {NULL, 0, NULL, 0},
- };
- char *short_options = long_options_to_short_options(long_options);
- const char *appctl = "ovs-appctl";
- const char *vsctl = "ovs-vsctl";
-
- for (;;) {
- int c;
-
- c = getopt_long(argc, argv, short_options, long_options, NULL);
- if (c == -1) {
- break;
- }
-
- switch (c) {
- case 'h':
- usage();
-
- case 'V':
- ovs_print_version(0, 0);
- exit(EXIT_SUCCESS);
-
- case OPT_APPCTL:
- appctl = optarg;
- break;
-
- case OPT_VSCTL:
- vsctl = optarg;
- break;
-
- VLOG_OPTION_HANDLERS
- DAEMON_OPTION_HANDLERS
- LEAK_CHECKER_OPTION_HANDLERS
-
- case '?':
- exit(EXIT_FAILURE);
-
- default:
- abort();
- }
- }
- free(short_options);
-
- appctl_program = process_search_path(appctl);
- if (!appctl_program) {
- VLOG_FATAL("%s: not found in $PATH (use --appctl to specify an "
- "alternate location)", appctl);
- }
-
- vsctl_program = process_search_path(vsctl);
- if (!vsctl_program) {
- VLOG_FATAL("%s: not found in $PATH (use --vsctl to specify an "
- "alternate location)", vsctl);
- }
-
- if (argc != optind) {
- VLOG_FATAL("no non-option arguments are supported; "
- "use --help for usage");
- }
-}
-
-static void
-usage(void)
-{
- printf("%s: bridge compatibility front-end for ovs-vswitchd\n"
- "usage: %s [OPTIONS]\n",
- program_name, program_name);
- printf("\nConfiguration options:\n"
- " --appctl=PROGRAM overrides $PATH for finding ovs-appctl\n"
- " --vsctl=PROGRAM overrides $PATH for finding ovs-vsctl\n"
- );
- daemon_usage();
- vlog_usage();
- printf("\nOther options:\n"
- " -h, --help display this help message\n"
- " -V, --version display version information\n");
- leak_checker_usage();
- exit(EXIT_SUCCESS);
-}
git://git.onelab.eu / sliver-openvswitch.git / commitdiff