vswitchd/ovs-vswitchd.c

   1 /* Copyright (c) 2008, 2009, 2010, 2011 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 "dirs.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 "process.h"
  40 #include "signals.h"
  41 #include "stream-ssl.h"
  42 #include "stream.h"
  43 #include "stress.h"
  44 #include "svec.h"
  45 #include "timeval.h"
  46 #include "unixctl.h"
  47 #include "util.h"
  48 #include "vconn.h"
  49 #include "vlog.h"
  50 #include "vswitchd/vswitch-idl.h"
  51
  52 VLOG_DEFINE_THIS_MODULE(vswitchd);
  53
  54 static unixctl_cb_func ovs_vswitchd_exit;
  55
  56 static char *parse_options(int argc, char *argv[]);
  57 static void usage(void) NO_RETURN;
  58
  59 int
  60 main(int argc, char *argv[])
  61 {
  62     struct unixctl_server *unixctl;
  63     struct signal *sighup;
  64     char *remote;
  65     bool exiting;
  66     int retval;
  67
  68     proctitle_init(argc, argv);
  69     set_program_name(argv[0]);
  70     stress_init_command();
  71     remote = parse_options(argc, argv);
  72     signal(SIGPIPE, SIG_IGN);
  73     sighup = signal_register(SIGHUP);
  74     process_init();
  75     ovsrec_init();
  76
  77     daemonize_start();
  78
  79     retval = unixctl_server_create(NULL, &unixctl);
  80     if (retval) {
  81         exit(EXIT_FAILURE);
  82     }
  83     unixctl_command_register("exit", "", ovs_vswitchd_exit, &exiting);
  84
  85     bridge_init(remote);
  86     free(remote);
  87
  88     exiting = false;
  89     while (!exiting) {
  90         if (signal_poll(sighup)) {
  91             vlog_reopen_log_file();
  92         }
  93         bridge_run();
  94         unixctl_server_run(unixctl);
  95         netdev_run();
  96
  97         signal_wait(sighup);
  98         bridge_wait();
  99         unixctl_server_wait(unixctl);
 100         netdev_wait();
 101         if (exiting) {
 102             poll_immediate_wake();
 103         }
 104         poll_block();
 105     }
 106     bridge_exit();
 107     unixctl_server_destroy(unixctl);
 108     signal_unregister(sighup);
 109
 110     return 0;
 111 }
 112
 113 static char *
 114 parse_options(int argc, char *argv[])
 115 {
 116     enum {
 117         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 118         OPT_MLOCKALL,
 119         VLOG_OPTION_ENUMS,
 120         LEAK_CHECKER_OPTION_ENUMS,
 121         OPT_BOOTSTRAP_CA_CERT,
 122         OPT_ENABLE_DUMMY,
 123         DAEMON_OPTION_ENUMS
 124     };
 125     static struct option long_options[] = {
 126         {"help",        no_argument, NULL, 'h'},
 127         {"version",     no_argument, NULL, 'V'},
 128         {"mlockall",    no_argument, NULL, OPT_MLOCKALL},
 129         DAEMON_LONG_OPTIONS,
 130         VLOG_LONG_OPTIONS,
 131         LEAK_CHECKER_LONG_OPTIONS,
 132         STREAM_SSL_LONG_OPTIONS,
 133         {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
 134         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
 135         {"enable-dummy", no_argument, NULL, OPT_ENABLE_DUMMY},
 136         {NULL, 0, NULL, 0},
 137     };
 138     char *short_options = long_options_to_short_options(long_options);
 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             usage();
 151
 152         case 'V':
 153             ovs_print_version(OFP_VERSION, OFP_VERSION);
 154             exit(EXIT_SUCCESS);
 155
 156         case OPT_MLOCKALL:
 157 #ifdef HAVE_MLOCKALL
 158             if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
 159                 VLOG_ERR("mlockall failed: %s", strerror(errno));
 160             }
 161 #else
 162             VLOG_ERR("mlockall not supported on this system");
 163 #endif
 164             break;
 165
 166         VLOG_OPTION_HANDLERS
 167         DAEMON_OPTION_HANDLERS
 168         LEAK_CHECKER_OPTION_HANDLERS
 169         STREAM_SSL_OPTION_HANDLERS
 170
 171         case OPT_PEER_CA_CERT:
 172             stream_ssl_set_peer_ca_cert_file(optarg);
 173             break;
 174
 175         case OPT_BOOTSTRAP_CA_CERT:
 176             stream_ssl_set_ca_cert_file(optarg, true);
 177             break;
 178
 179         case OPT_ENABLE_DUMMY:
 180             dummy_enable();
 181             break;
 182
 183         case '?':
 184             exit(EXIT_FAILURE);
 185
 186         default:
 187             abort();
 188         }
 189     }
 190     free(short_options);
 191
 192     argc -= optind;
 193     argv += optind;
 194
 195     switch (argc) {
 196     case 0:
 197         return xasprintf("unix:%s/db.sock", ovs_rundir());
 198
 199     case 1:
 200         return xstrdup(argv[0]);
 201
 202     default:
 203         VLOG_FATAL("at most one non-option argument accepted; "
 204                    "use --help for usage");
 205     }
 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            "      (default: \"unix:%s/db.sock\").\n",
 215            program_name, program_name, ovs_rundir());
 216     stream_usage("DATABASE", true, false, true);
 217     daemon_usage();
 218     vlog_usage();
 219     printf("\nOther options:\n"
 220            "  -h, --help              display this help message\n"
 221            "  -V, --version           display version information\n");
 222     leak_checker_usage();
 223     exit(EXIT_SUCCESS);
 224 }
 225
 226 static void
 227 ovs_vswitchd_exit(struct unixctl_conn *conn, const char *args OVS_UNUSED,
 228                   void *exiting_)
 229 {
 230     bool *exiting = exiting_;
 231     *exiting = true;
 232     unixctl_command_reply(conn, 200, NULL);
 233 }