vswitchd/ovs-vswitchd.c

   1 /* Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
   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 "memory.h"
  38 #include "netdev.h"
  39 #include "openflow/openflow.h"
  40 #include "ovsdb-idl.h"
  41 #include "poll-loop.h"
  42 #include "process.h"
  43 #include "signals.h"
  44 #include "simap.h"
  45 #include "stream-ssl.h"
  46 #include "stream.h"
  47 #include "stress.h"
  48 #include "svec.h"
  49 #include "timeval.h"
  50 #include "unixctl.h"
  51 #include "util.h"
  52 #include "vconn.h"
  53 #include "vlog.h"
  54 #include "lib/vswitch-idl.h"
  55
  56 VLOG_DEFINE_THIS_MODULE(vswitchd);
  57
  58 static unixctl_cb_func ovs_vswitchd_exit;
  59
  60 static char *parse_options(int argc, char *argv[], char **unixctl_path);
  61 static void usage(void) NO_RETURN;
  62
  63 int
  64 main(int argc, char *argv[])
  65 {
  66     char *unixctl_path = NULL;
  67     struct unixctl_server *unixctl;
  68     struct signal *sighup;
  69     char *remote;
  70     bool exiting;
  71     int retval;
  72
  73     proctitle_init(argc, argv);
  74     set_program_name(argv[0]);
  75     stress_init_command();
  76     remote = parse_options(argc, argv, &unixctl_path);
  77     signal(SIGPIPE, SIG_IGN);
  78     sighup = signal_register(SIGHUP);
  79     process_init();
  80     ovsrec_init();
  81
  82     daemonize_start();
  83
  84     retval = unixctl_server_create(unixctl_path, &unixctl);
  85     if (retval) {
  86         exit(EXIT_FAILURE);
  87     }
  88     unixctl_command_register("exit", "", 0, 0, ovs_vswitchd_exit, &exiting);
  89
  90     bridge_init(remote);
  91     free(remote);
  92
  93     exiting = false;
  94     while (!exiting) {
  95         if (signal_poll(sighup)) {
  96             vlog_reopen_log_file();
  97         }
  98         memory_run();
  99         if (memory_should_report()) {
 100             struct simap usage;
 101
 102             simap_init(&usage);
 103             bridge_get_memory_usage(&usage);
 104             memory_report(&usage);
 105             simap_destroy(&usage);
 106         }
 107         bridge_run_fast();
 108         bridge_run();
 109         bridge_run_fast();
 110         unixctl_server_run(unixctl);
 111         netdev_run();
 112
 113         signal_wait(sighup);
 114         memory_wait();
 115         bridge_wait();
 116         unixctl_server_wait(unixctl);
 117         netdev_wait();
 118         if (exiting) {
 119             poll_immediate_wake();
 120         }
 121         poll_block();
 122     }
 123     bridge_exit();
 124     unixctl_server_destroy(unixctl);
 125     signal_unregister(sighup);
 126
 127     return 0;
 128 }
 129
 130 static char *
 131 parse_options(int argc, char *argv[], char **unixctl_pathp)
 132 {
 133     enum {
 134         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 135         OPT_MLOCKALL,
 136         OPT_UNIXCTL,
 137         VLOG_OPTION_ENUMS,
 138         LEAK_CHECKER_OPTION_ENUMS,
 139         OPT_BOOTSTRAP_CA_CERT,
 140         OPT_ENABLE_DUMMY,
 141         OPT_DISABLE_SYSTEM,
 142         DAEMON_OPTION_ENUMS
 143     };
 144     static struct option long_options[] = {
 145         {"help",        no_argument, NULL, 'h'},
 146         {"version",     no_argument, NULL, 'V'},
 147         {"mlockall",    no_argument, NULL, OPT_MLOCKALL},
 148         {"unixctl",     required_argument, NULL, OPT_UNIXCTL},
 149         DAEMON_LONG_OPTIONS,
 150         VLOG_LONG_OPTIONS,
 151         LEAK_CHECKER_LONG_OPTIONS,
 152         STREAM_SSL_LONG_OPTIONS,
 153         {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
 154         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
 155         {"enable-dummy", optional_argument, NULL, OPT_ENABLE_DUMMY},
 156         {"disable-system", no_argument, NULL, OPT_DISABLE_SYSTEM},
 157         {NULL, 0, NULL, 0},
 158     };
 159     char *short_options = long_options_to_short_options(long_options);
 160
 161     for (;;) {
 162         int c;
 163
 164         c = getopt_long(argc, argv, short_options, long_options, NULL);
 165         if (c == -1) {
 166             break;
 167         }
 168
 169         switch (c) {
 170         case 'h':
 171             usage();
 172
 173         case 'V':
 174             ovs_print_version(OFP10_VERSION, OFP10_VERSION);
 175             exit(EXIT_SUCCESS);
 176
 177         case OPT_MLOCKALL:
 178 #ifdef HAVE_MLOCKALL
 179             if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
 180                 VLOG_ERR("mlockall failed: %s", strerror(errno));
 181             }
 182 #else
 183             VLOG_ERR("mlockall not supported on this system");
 184 #endif
 185             break;
 186
 187         case OPT_UNIXCTL:
 188             *unixctl_pathp = optarg;
 189             break;
 190
 191         VLOG_OPTION_HANDLERS
 192         DAEMON_OPTION_HANDLERS
 193         LEAK_CHECKER_OPTION_HANDLERS
 194         STREAM_SSL_OPTION_HANDLERS
 195
 196         case OPT_PEER_CA_CERT:
 197             stream_ssl_set_peer_ca_cert_file(optarg);
 198             break;
 199
 200         case OPT_BOOTSTRAP_CA_CERT:
 201             stream_ssl_set_ca_cert_file(optarg, true);
 202             break;
 203
 204         case OPT_ENABLE_DUMMY:
 205             dummy_enable(optarg && !strcmp(optarg, "override"));
 206             break;
 207
 208         case OPT_DISABLE_SYSTEM:
 209             dp_blacklist_provider("system");
 210             break;
 211
 212         case '?':
 213             exit(EXIT_FAILURE);
 214
 215         default:
 216             abort();
 217         }
 218     }
 219     free(short_options);
 220
 221     argc -= optind;
 222     argv += optind;
 223
 224     switch (argc) {
 225     case 0:
 226         return xasprintf("unix:%s/db.sock", ovs_rundir());
 227
 228     case 1:
 229         return xstrdup(argv[0]);
 230
 231     default:
 232         VLOG_FATAL("at most one non-option argument accepted; "
 233                    "use --help for usage");
 234     }
 235 }
 236
 237 static void
 238 usage(void)
 239 {
 240     printf("%s: Open vSwitch daemon\n"
 241            "usage: %s [OPTIONS] [DATABASE]\n"
 242            "where DATABASE is a socket on which ovsdb-server is listening\n"
 243            "      (default: \"unix:%s/db.sock\").\n",
 244            program_name, program_name, ovs_rundir());
 245     stream_usage("DATABASE", true, false, true);
 246     daemon_usage();
 247     vlog_usage();
 248     printf("\nOther options:\n"
 249            "  --unixctl=SOCKET        override default control socket name\n"
 250            "  -h, --help              display this help message\n"
 251            "  -V, --version           display version information\n");
 252     leak_checker_usage();
 253     exit(EXIT_SUCCESS);
 254 }
 255
 256 static void
 257 ovs_vswitchd_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
 258                   const char *argv[] OVS_UNUSED, void *exiting_)
 259 {
 260     bool *exiting = exiting_;
 261     *exiting = true;
 262     unixctl_command_reply(conn, NULL);
 263 }