vswitchd/ovs-vswitchd.c

   1 /* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 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 <errno.h>
  19 #include <getopt.h>
  20 #include <limits.h>
  21 #include <signal.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #ifdef HAVE_MLOCKALL
  25 #include <sys/mman.h>
  26 #endif
  27
  28 #include "bridge.h"
  29 #include "command-line.h"
  30 #include "compiler.h"
  31 #include "daemon.h"
  32 #include "dirs.h"
  33 #include "dpif.h"
  34 #include "dummy.h"
  35 #include "memory.h"
  36 #include "netdev.h"
  37 #include "openflow/openflow.h"
  38 #include "ovsdb-idl.h"
  39 #include "poll-loop.h"
  40 #include "process.h"
  41 #include "signals.h"
  42 #include "simap.h"
  43 #include "stream-ssl.h"
  44 #include "stream.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 "lib/vswitch-idl.h"
  52
  53 VLOG_DEFINE_THIS_MODULE(vswitchd);
  54
  55 /* --mlockall: If set, locks all process memory into physical RAM, preventing
  56  * the kernel from paging any of its memory to disk. */
  57 static bool want_mlockall;
  58
  59 static unixctl_cb_func ovs_vswitchd_exit;
  60
  61 static char *parse_options(int argc, char *argv[], char **unixctl_path);
  62 static void usage(void) NO_RETURN;
  63
  64 int
  65 main(int argc, char *argv[])
  66 {
  67     char *unixctl_path = NULL;
  68     struct unixctl_server *unixctl;
  69     struct signal *sighup;
  70     char *remote;
  71     bool exiting;
  72     int retval;
  73
  74     proctitle_init(argc, argv);
  75     set_program_name(argv[0]);
  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     if (want_mlockall) {
  85 #ifdef HAVE_MLOCKALL
  86         if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
  87             VLOG_ERR("mlockall failed: %s", ovs_strerror(errno));
  88         }
  89 #else
  90         VLOG_ERR("mlockall not supported on this system");
  91 #endif
  92     }
  93
  94     retval = unixctl_server_create(unixctl_path, &unixctl);
  95     if (retval) {
  96         exit(EXIT_FAILURE);
  97     }
  98     unixctl_command_register("exit", "", 0, 0, ovs_vswitchd_exit, &exiting);
  99
 100     bridge_init(remote);
 101     free(remote);
 102
 103     exiting = false;
 104     while (!exiting) {
 105         if (signal_poll(sighup)) {
 106             vlog_reopen_log_file();
 107         }
 108         memory_run();
 109         if (memory_should_report()) {
 110             struct simap usage;
 111
 112             simap_init(&usage);
 113             bridge_get_memory_usage(&usage);
 114             memory_report(&usage);
 115             simap_destroy(&usage);
 116         }
 117         bridge_run_fast();
 118         bridge_run();
 119         bridge_run_fast();
 120         unixctl_server_run(unixctl);
 121         netdev_run();
 122
 123         signal_wait(sighup);
 124         memory_wait();
 125         bridge_wait();
 126         unixctl_server_wait(unixctl);
 127         netdev_wait();
 128         if (exiting) {
 129             poll_immediate_wake();
 130         }
 131         poll_block();
 132     }
 133     bridge_exit();
 134     unixctl_server_destroy(unixctl);
 135
 136     return 0;
 137 }
 138
 139 static char *
 140 parse_options(int argc, char *argv[], char **unixctl_pathp)
 141 {
 142     enum {
 143         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 144         OPT_MLOCKALL,
 145         OPT_UNIXCTL,
 146         VLOG_OPTION_ENUMS,
 147         OPT_BOOTSTRAP_CA_CERT,
 148         OPT_ENABLE_DUMMY,
 149         OPT_DISABLE_SYSTEM,
 150         DAEMON_OPTION_ENUMS
 151     };
 152     static const struct option long_options[] = {
 153         {"help",        no_argument, NULL, 'h'},
 154         {"version",     no_argument, NULL, 'V'},
 155         {"mlockall",    no_argument, NULL, OPT_MLOCKALL},
 156         {"unixctl",     required_argument, NULL, OPT_UNIXCTL},
 157         DAEMON_LONG_OPTIONS,
 158         VLOG_LONG_OPTIONS,
 159         STREAM_SSL_LONG_OPTIONS,
 160         {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
 161         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
 162         {"enable-dummy", optional_argument, NULL, OPT_ENABLE_DUMMY},
 163         {"disable-system", no_argument, NULL, OPT_DISABLE_SYSTEM},
 164         {NULL, 0, NULL, 0},
 165     };
 166     char *short_options = long_options_to_short_options(long_options);
 167
 168     for (;;) {
 169         int c;
 170
 171         c = getopt_long(argc, argv, short_options, long_options, NULL);
 172         if (c == -1) {
 173             break;
 174         }
 175
 176         switch (c) {
 177         case 'h':
 178             usage();
 179
 180         case 'V':
 181             ovs_print_version(OFP10_VERSION, OFP10_VERSION);
 182             exit(EXIT_SUCCESS);
 183
 184         case OPT_MLOCKALL:
 185             want_mlockall = true;
 186             break;
 187
 188         case OPT_UNIXCTL:
 189             *unixctl_pathp = optarg;
 190             break;
 191
 192         VLOG_OPTION_HANDLERS
 193         DAEMON_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     exit(EXIT_SUCCESS);
 253 }
 254
 255 static void
 256 ovs_vswitchd_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
 257                   const char *argv[] OVS_UNUSED, void *exiting_)
 258 {
 259     bool *exiting = exiting_;
 260     *exiting = true;
 261     unixctl_command_reply(conn, NULL);
 262 }