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 "dummy.h"
  35 #include "leak-checker.h"
  36 #include "netdev.h"
  37 #include "ovsdb-idl.h"
  38 #include "poll-loop.h"
  39 #include "proc-net-compat.h"
  40 #include "process.h"
  41 #include "signals.h"
  42 #include "stream-ssl.h"
  43 #include "stream.h"
  44 #include "stress.h"
  45 #include "svec.h"
  46 #include "timeval.h"
  47 #include "unixctl.h"
  48 #include "util.h"
  49 #include "vconn.h"
  50 #include "vlog.h"
  51 #include "vswitchd/vswitch-idl.h"
  52
  53 VLOG_DEFINE_THIS_MODULE(vswitchd);
  54
  55 static unixctl_cb_func ovs_vswitchd_exit;
  56
  57 static const char *parse_options(int argc, char *argv[]);
  58 static void usage(void) NO_RETURN;
  59
  60 int
  61 main(int argc, char *argv[])
  62 {
  63     struct unixctl_server *unixctl;
  64     struct signal *sighup;
  65     const char *remote;
  66     bool exiting;
  67     int retval;
  68
  69     proctitle_init(argc, argv);
  70     set_program_name(argv[0]);
  71     stress_init_command();
  72     remote = parse_options(argc, argv);
  73     signal(SIGPIPE, SIG_IGN);
  74     sighup = signal_register(SIGHUP);
  75     process_init();
  76     ovsrec_init();
  77
  78     die_if_already_running();
  79     daemonize_start();
  80
  81     retval = unixctl_server_create(NULL, &unixctl);
  82     if (retval) {
  83         exit(EXIT_FAILURE);
  84     }
  85     unixctl_command_register("exit", ovs_vswitchd_exit, &exiting);
  86
  87     daemonize_complete();
  88
  89     bridge_init(remote);
  90     exiting = false;
  91     while (!exiting) {
  92         if (signal_poll(sighup)) {
  93             vlog_reopen_log_file();
  94         }
  95         bridge_run();
  96         unixctl_server_run(unixctl);
  97         dp_run();
  98         netdev_run();
  99
 100         signal_wait(sighup);
 101         bridge_wait();
 102         unixctl_server_wait(unixctl);
 103         dp_wait();
 104         netdev_wait();
 105         if (exiting) {
 106             poll_immediate_wake();
 107         }
 108         poll_block();
 109     }
 110     bridge_exit();
 111     unixctl_server_destroy(unixctl);
 112
 113     return 0;
 114 }
 115
 116 static const char *
 117 parse_options(int argc, char *argv[])
 118 {
 119     enum {
 120         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 121         OPT_MLOCKALL,
 122         OPT_FAKE_PROC_NET,
 123         VLOG_OPTION_ENUMS,
 124         LEAK_CHECKER_OPTION_ENUMS,
 125         OPT_BOOTSTRAP_CA_CERT,
 126         OPT_ENABLE_DUMMY,
 127         DAEMON_OPTION_ENUMS
 128     };
 129     static struct option long_options[] = {
 130         {"help",        no_argument, 0, 'h'},
 131         {"version",     no_argument, 0, 'V'},
 132         {"mlockall",    no_argument, 0, OPT_MLOCKALL},
 133         {"fake-proc-net", no_argument, 0, OPT_FAKE_PROC_NET},
 134         DAEMON_LONG_OPTIONS,
 135         VLOG_LONG_OPTIONS,
 136         LEAK_CHECKER_LONG_OPTIONS,
 137 #ifdef HAVE_OPENSSL
 138         STREAM_SSL_LONG_OPTIONS
 139         {"peer-ca-cert", required_argument, 0, OPT_PEER_CA_CERT},
 140         {"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
 141 #endif
 142         {"enable-dummy", no_argument, 0, OPT_ENABLE_DUMMY},
 143         {0, 0, 0, 0},
 144     };
 145     char *short_options = long_options_to_short_options(long_options);
 146     int error;
 147
 148     for (;;) {
 149         int c;
 150
 151         c = getopt_long(argc, argv, short_options, long_options, NULL);
 152         if (c == -1) {
 153             break;
 154         }
 155
 156         switch (c) {
 157         case 'H':
 158         case 'h':
 159             usage();
 160
 161         case 'V':
 162             OVS_PRINT_VERSION(OFP_VERSION, OFP_VERSION);
 163             exit(EXIT_SUCCESS);
 164
 165         case OPT_MLOCKALL:
 166 #ifdef HAVE_MLOCKALL
 167             if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
 168                 VLOG_ERR("mlockall failed: %s", strerror(errno));
 169             }
 170 #else
 171             VLOG_ERR("mlockall not supported on this system");
 172 #endif
 173             break;
 174
 175         case OPT_FAKE_PROC_NET:
 176             error = proc_net_compat_init();
 177             if (error) {
 178                 ovs_fatal(error, "failed to initialize /proc/net "
 179                           "compatibility");
 180             }
 181             break;
 182
 183         VLOG_OPTION_HANDLERS
 184         DAEMON_OPTION_HANDLERS
 185         LEAK_CHECKER_OPTION_HANDLERS
 186
 187 #ifdef HAVE_OPENSSL
 188         STREAM_SSL_OPTION_HANDLERS
 189
 190         case OPT_PEER_CA_CERT:
 191             stream_ssl_set_peer_ca_cert_file(optarg);
 192             break;
 193
 194         case OPT_BOOTSTRAP_CA_CERT:
 195             stream_ssl_set_ca_cert_file(optarg, true);
 196             break;
 197 #endif
 198
 199         case OPT_ENABLE_DUMMY:
 200             dummy_enable();
 201             break;
 202
 203         case '?':
 204             exit(EXIT_FAILURE);
 205
 206         default:
 207             abort();
 208         }
 209     }
 210     free(short_options);
 211
 212     argc -= optind;
 213     argv += optind;
 214
 215     if (argc != 1) {
 216         ovs_fatal(0, "database socket is only non-option argument; "
 217                 "use --help for usage");
 218     }
 219
 220     return argv[0];
 221 }
 222
 223 static void
 224 usage(void)
 225 {
 226     printf("%s: Open vSwitch daemon\n"
 227            "usage: %s [OPTIONS] DATABASE\n"
 228            "where DATABASE is a socket on which ovsdb-server is listening.\n",
 229            program_name, program_name);
 230     stream_usage("DATABASE", true, false, true);
 231     daemon_usage();
 232     vlog_usage();
 233     printf("\nLegacy compatibility options:\n"
 234            " --fake-proc-net          simulate some files in /proc/net\n"
 235            "\nOther options:\n"
 236            "  -h, --help              display this help message\n"
 237            "  -V, --version           display version information\n");
 238     leak_checker_usage();
 239     exit(EXIT_SUCCESS);
 240 }
 241
 242 static void
 243 ovs_vswitchd_exit(struct unixctl_conn *conn, const char *args OVS_UNUSED,
 244                   void *exiting_)
 245 {
 246     bool *exiting = exiting_;
 247     *exiting = true;
 248     unixctl_command_reply(conn, 200, NULL);
 249 }