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