vswitchd/ovs-vswitchd.c

   1 /* Copyright (c) 2008, 2009, 2010 Nicira Networks
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #include <config.h>
  17
  18 #include <assert.h>
  19 #include <errno.h>
  20 #include <getopt.h>
  21 #include <limits.h>
  22 #include <signal.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #ifdef HAVE_MLOCKALL
  26 #include <sys/mman.h>
  27 #endif
  28
  29 #include "bridge.h"
  30 #include "command-line.h"
  31 #include "compiler.h"
  32 #include "daemon.h"
  33 #include "dpif.h"
  34 #include "leak-checker.h"
  35 #include "netdev.h"
  36 #include "ovsdb-idl.h"
  37 #include "poll-loop.h"
  38 #include "proc-net-compat.h"
  39 #include "process.h"
  40 #include "signals.h"
  41 #include "stream-ssl.h"
  42 #include "stream.h"
  43 #include "svec.h"
  44 #include "timeval.h"
  45 #include "unixctl.h"
  46 #include "util.h"
  47 #include "vconn.h"
  48 #include "vlog.h"
  49 #include "vswitchd/vswitch-idl.h"
  50
  51 VLOG_DEFINE_THIS_MODULE(vswitchd);
  52
  53 static unixctl_cb_func ovs_vswitchd_exit;
  54
  55 static const char *parse_options(int argc, char *argv[]);
  56 static void usage(void) NO_RETURN;
  57
  58 int
  59 main(int argc, char *argv[])
  60 {
  61     struct unixctl_server *unixctl;
  62     struct signal *sighup;
  63     const char *remote;
  64     bool exiting;
  65     int retval;
  66
  67     proctitle_init(argc, argv);
  68     set_program_name(argv[0]);
  69     remote = parse_options(argc, argv);
  70     signal(SIGPIPE, SIG_IGN);
  71     sighup = signal_register(SIGHUP);
  72     process_init();
  73     ovsrec_init();
  74
  75     die_if_already_running();
  76     daemonize_start();
  77
  78     retval = unixctl_server_create(NULL, &unixctl);
  79     if (retval) {
  80         exit(EXIT_FAILURE);
  81     }
  82     unixctl_command_register("exit", ovs_vswitchd_exit, &exiting);
  83
  84     daemonize_complete();
  85
  86     bridge_init(remote);
  87     exiting = false;
  88     while (!exiting) {
  89         if (signal_poll(sighup)) {
  90             vlog_reopen_log_file();
  91         }
  92         bridge_run();
  93         unixctl_server_run(unixctl);
  94         dp_run();
  95         netdev_run();
  96
  97         signal_wait(sighup);
  98         bridge_wait();
  99         unixctl_server_wait(unixctl);
 100         dp_wait();
 101         netdev_wait();
 102         if (exiting) {
 103             poll_immediate_wake();
 104         }
 105         poll_block();
 106     }
 107
 108     return 0;
 109 }
 110
 111 static const char *
 112 parse_options(int argc, char *argv[])
 113 {
 114     enum {
 115         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 116         OPT_MLOCKALL,
 117         OPT_FAKE_PROC_NET,
 118         VLOG_OPTION_ENUMS,
 119         LEAK_CHECKER_OPTION_ENUMS,
 120         OPT_BOOTSTRAP_CA_CERT
 121     };
 122     static struct option long_options[] = {
 123         {"help",        no_argument, 0, 'h'},
 124         {"version",     no_argument, 0, 'V'},
 125         {"mlockall",    no_argument, 0, OPT_MLOCKALL},
 126         {"fake-proc-net", no_argument, 0, OPT_FAKE_PROC_NET},
 127         DAEMON_LONG_OPTIONS,
 128         VLOG_LONG_OPTIONS,
 129         LEAK_CHECKER_LONG_OPTIONS,
 130 #ifdef HAVE_OPENSSL
 131         STREAM_SSL_LONG_OPTIONS
 132         {"peer-ca-cert", required_argument, 0, OPT_PEER_CA_CERT},
 133         {"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
 134 #endif
 135         {0, 0, 0, 0},
 136     };
 137     char *short_options = long_options_to_short_options(long_options);
 138     int error;
 139
 140     for (;;) {
 141         int c;
 142
 143         c = getopt_long(argc, argv, short_options, long_options, NULL);
 144         if (c == -1) {
 145             break;
 146         }
 147
 148         switch (c) {
 149         case 'H':
 150         case 'h':
 151             usage();
 152
 153         case 'V':
 154             OVS_PRINT_VERSION(OFP_VERSION, OFP_VERSION);
 155             exit(EXIT_SUCCESS);
 156
 157         case OPT_MLOCKALL:
 158 #ifdef HAVE_MLOCKALL
 159             if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
 160                 VLOG_ERR("mlockall failed: %s", strerror(errno));
 161             }
 162 #else
 163             VLOG_ERR("mlockall not supported on this system");
 164 #endif
 165             break;
 166
 167         case OPT_FAKE_PROC_NET:
 168             error = proc_net_compat_init();
 169             if (error) {
 170                 ovs_fatal(error, "failed to initialize /proc/net "
 171                           "compatibility");
 172             }
 173             break;
 174
 175         VLOG_OPTION_HANDLERS
 176         DAEMON_OPTION_HANDLERS
 177         LEAK_CHECKER_OPTION_HANDLERS
 178
 179 #ifdef HAVE_OPENSSL
 180         STREAM_SSL_OPTION_HANDLERS
 181
 182         case OPT_PEER_CA_CERT:
 183             stream_ssl_set_peer_ca_cert_file(optarg);
 184             break;
 185
 186         case OPT_BOOTSTRAP_CA_CERT:
 187             stream_ssl_set_ca_cert_file(optarg, true);
 188             break;
 189 #endif
 190
 191         case '?':
 192             exit(EXIT_FAILURE);
 193
 194         default:
 195             abort();
 196         }
 197     }
 198     free(short_options);
 199
 200     argc -= optind;
 201     argv += optind;
 202
 203     if (argc != 1) {
 204         ovs_fatal(0, "database socket is only non-option argument; "
 205                 "use --help for usage");
 206     }
 207
 208     return argv[0];
 209 }
 210
 211 static void
 212 usage(void)
 213 {
 214     printf("%s: Open vSwitch daemon\n"
 215            "usage: %s [OPTIONS] DATABASE\n"
 216            "where DATABASE is a socket on which ovsdb-server is listening.\n",
 217            program_name, program_name);
 218     stream_usage("DATABASE", true, false, true);
 219     daemon_usage();
 220     vlog_usage();
 221     printf("\nLegacy compatibility options:\n"
 222            " --fake-proc-net          simulate some files in /proc/net\n"
 223            "\nOther options:\n"
 224            "  -h, --help              display this help message\n"
 225            "  -V, --version           display version information\n");
 226     leak_checker_usage();
 227     exit(EXIT_SUCCESS);
 228 }
 229
 230 static void
 231 ovs_vswitchd_exit(struct unixctl_conn *conn, const char *args OVS_UNUSED,
 232                   void *exiting_)
 233 {
 234     bool *exiting = exiting_;
 235     *exiting = true;
 236     unixctl_command_reply(conn, 200, NULL);
 237 }