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         poll_block();
 103     }
 104
 105     return 0;
 106 }
 107
 108 static const char *
 109 parse_options(int argc, char *argv[])
 110 {
 111     enum {
 112         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 113         OPT_MLOCKALL,
 114         OPT_FAKE_PROC_NET,
 115         VLOG_OPTION_ENUMS,
 116         LEAK_CHECKER_OPTION_ENUMS,
 117         OPT_BOOTSTRAP_CA_CERT
 118     };
 119     static struct option long_options[] = {
 120         {"help",        no_argument, 0, 'h'},
 121         {"version",     no_argument, 0, 'V'},
 122         {"mlockall",    no_argument, 0, OPT_MLOCKALL},
 123         {"fake-proc-net", no_argument, 0, OPT_FAKE_PROC_NET},
 124         DAEMON_LONG_OPTIONS,
 125         VLOG_LONG_OPTIONS,
 126         LEAK_CHECKER_LONG_OPTIONS,
 127 #ifdef HAVE_OPENSSL
 128         STREAM_SSL_LONG_OPTIONS
 129         {"peer-ca-cert", required_argument, 0, OPT_PEER_CA_CERT},
 130         {"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
 131 #endif
 132         {0, 0, 0, 0},
 133     };
 134     char *short_options = long_options_to_short_options(long_options);
 135     int error;
 136
 137     for (;;) {
 138         int c;
 139
 140         c = getopt_long(argc, argv, short_options, long_options, NULL);
 141         if (c == -1) {
 142             break;
 143         }
 144
 145         switch (c) {
 146         case 'H':
 147         case 'h':
 148             usage();
 149
 150         case 'V':
 151             OVS_PRINT_VERSION(OFP_VERSION, OFP_VERSION);
 152             exit(EXIT_SUCCESS);
 153
 154         case OPT_MLOCKALL:
 155 #ifdef HAVE_MLOCKALL
 156             if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
 157                 VLOG_ERR("mlockall failed: %s", strerror(errno));
 158             }
 159 #else
 160             VLOG_ERR("mlockall not supported on this system");
 161 #endif
 162             break;
 163
 164         case OPT_FAKE_PROC_NET:
 165             error = proc_net_compat_init();
 166             if (error) {
 167                 ovs_fatal(error, "failed to initialize /proc/net "
 168                           "compatibility");
 169             }
 170             break;
 171
 172         VLOG_OPTION_HANDLERS
 173         DAEMON_OPTION_HANDLERS
 174         LEAK_CHECKER_OPTION_HANDLERS
 175
 176 #ifdef HAVE_OPENSSL
 177         STREAM_SSL_OPTION_HANDLERS
 178
 179         case OPT_PEER_CA_CERT:
 180             stream_ssl_set_peer_ca_cert_file(optarg);
 181             break;
 182
 183         case OPT_BOOTSTRAP_CA_CERT:
 184             stream_ssl_set_ca_cert_file(optarg, true);
 185             break;
 186 #endif
 187
 188         case '?':
 189             exit(EXIT_FAILURE);
 190
 191         default:
 192             abort();
 193         }
 194     }
 195     free(short_options);
 196
 197     argc -= optind;
 198     argv += optind;
 199
 200     if (argc != 1) {
 201         ovs_fatal(0, "database socket is only non-option argument; "
 202                 "use --help for usage");
 203     }
 204
 205     return argv[0];
 206 }
 207
 208 static void
 209 usage(void)
 210 {
 211     printf("%s: Open vSwitch daemon\n"
 212            "usage: %s [OPTIONS] DATABASE\n"
 213            "where DATABASE is a socket on which ovsdb-server is listening.\n",
 214            program_name, program_name);
 215     stream_usage("DATABASE", true, false, true);
 216     daemon_usage();
 217     vlog_usage();
 218     printf("\nLegacy compatibility options:\n"
 219            " --fake-proc-net          simulate some files in /proc/net\n"
 220            "\nOther options:\n"
 221            "  -h, --help              display this help message\n"
 222            "  -V, --version           display version information\n");
 223     leak_checker_usage();
 224     exit(EXIT_SUCCESS);
 225 }
 226
 227 static void
 228 ovs_vswitchd_exit(struct unixctl_conn *conn, const char *args OVS_UNUSED,
 229                   void *exiting_)
 230 {
 231     bool *exiting = exiting_;
 232     *exiting = true;
 233     unixctl_command_reply(conn, 200, NULL);
 234 }