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 /* --mlockall: If set, locks all process memory into physical RAM, preventing
  59  * the kernel from paging any of its memory to disk. */
  60 static bool want_mlockall;
  61
  62 static unixctl_cb_func ovs_vswitchd_exit;
  63
  64 static char *parse_options(int argc, char *argv[], char **unixctl_path);
  65 static void usage(void) NO_RETURN;
  66
  67 int
  68 main(int argc, char *argv[])
  69 {
  70     char *unixctl_path = NULL;
  71     struct unixctl_server *unixctl;
  72     struct signal *sighup;
  73     char *remote;
  74     bool exiting;
  75     int retval;
  76
  77     proctitle_init(argc, argv);
  78     set_program_name(argv[0]);
  79     stress_init_command();
  80     remote = parse_options(argc, argv, &unixctl_path);
  81     signal(SIGPIPE, SIG_IGN);
  82     sighup = signal_register(SIGHUP);
  83     process_init();
  84     ovsrec_init();
  85
  86     daemonize_start();
  87
  88     if (want_mlockall) {
  89 #ifdef HAVE_MLOCKALL
  90         if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
  91             VLOG_ERR("mlockall failed: %s", strerror(errno));
  92         }
  93 #else
  94         VLOG_ERR("mlockall not supported on this system");
  95 #endif
  96     }
  97
  98     retval = unixctl_server_create(unixctl_path, &unixctl);
  99     if (retval) {
 100         exit(EXIT_FAILURE);
 101     }
 102     unixctl_command_register("exit", "", 0, 0, ovs_vswitchd_exit, &exiting);
 103
 104     bridge_init(remote);
 105     free(remote);
 106
 107     exiting = false;
 108     while (!exiting) {
 109         if (signal_poll(sighup)) {
 110             vlog_reopen_log_file();
 111         }
 112         memory_run();
 113         if (memory_should_report()) {
 114             struct simap usage;
 115
 116             simap_init(&usage);
 117             bridge_get_memory_usage(&usage);
 118             memory_report(&usage);
 119             simap_destroy(&usage);
 120         }
 121         bridge_run_fast();
 122         bridge_run();
 123         bridge_run_fast();
 124         unixctl_server_run(unixctl);
 125         netdev_run();
 126
 127         signal_wait(sighup);
 128         memory_wait();
 129         bridge_wait();
 130         unixctl_server_wait(unixctl);
 131         netdev_wait();
 132         if (exiting) {
 133             poll_immediate_wake();
 134         }
 135         poll_block();
 136     }
 137     bridge_exit();
 138     unixctl_server_destroy(unixctl);
 139     signal_unregister(sighup);
 140
 141     return 0;
 142 }
 143
 144 static char *
 145 parse_options(int argc, char *argv[], char **unixctl_pathp)
 146 {
 147     enum {
 148         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 149         OPT_MLOCKALL,
 150         OPT_UNIXCTL,
 151         VLOG_OPTION_ENUMS,
 152         LEAK_CHECKER_OPTION_ENUMS,
 153         OPT_BOOTSTRAP_CA_CERT,
 154         OPT_ENABLE_DUMMY,
 155         OPT_DISABLE_SYSTEM,
 156         DAEMON_OPTION_ENUMS
 157     };
 158     static struct option long_options[] = {
 159         {"help",        no_argument, NULL, 'h'},
 160         {"version",     no_argument, NULL, 'V'},
 161         {"mlockall",    no_argument, NULL, OPT_MLOCKALL},
 162         {"unixctl",     required_argument, NULL, OPT_UNIXCTL},
 163         DAEMON_LONG_OPTIONS,
 164         VLOG_LONG_OPTIONS,
 165         LEAK_CHECKER_LONG_OPTIONS,
 166         STREAM_SSL_LONG_OPTIONS,
 167         {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
 168         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
 169         {"enable-dummy", optional_argument, NULL, OPT_ENABLE_DUMMY},
 170         {"disable-system", no_argument, NULL, OPT_DISABLE_SYSTEM},
 171         {NULL, 0, NULL, 0},
 172     };
 173     char *short_options = long_options_to_short_options(long_options);
 174
 175     for (;;) {
 176         int c;
 177
 178         c = getopt_long(argc, argv, short_options, long_options, NULL);
 179         if (c == -1) {
 180             break;
 181         }
 182
 183         switch (c) {
 184         case 'h':
 185             usage();
 186
 187         case 'V':
 188             ovs_print_version(OFP10_VERSION, OFP10_VERSION);
 189             exit(EXIT_SUCCESS);
 190
 191         case OPT_MLOCKALL:
 192             want_mlockall = true;
 193             break;
 194
 195         case OPT_UNIXCTL:
 196             *unixctl_pathp = optarg;
 197             break;
 198
 199         VLOG_OPTION_HANDLERS
 200         DAEMON_OPTION_HANDLERS
 201         LEAK_CHECKER_OPTION_HANDLERS
 202         STREAM_SSL_OPTION_HANDLERS
 203
 204         case OPT_PEER_CA_CERT:
 205             stream_ssl_set_peer_ca_cert_file(optarg);
 206             break;
 207
 208         case OPT_BOOTSTRAP_CA_CERT:
 209             stream_ssl_set_ca_cert_file(optarg, true);
 210             break;
 211
 212         case OPT_ENABLE_DUMMY:
 213             dummy_enable(optarg && !strcmp(optarg, "override"));
 214             break;
 215
 216         case OPT_DISABLE_SYSTEM:
 217             dp_blacklist_provider("system");
 218             break;
 219
 220         case '?':
 221             exit(EXIT_FAILURE);
 222
 223         default:
 224             abort();
 225         }
 226     }
 227     free(short_options);
 228
 229     argc -= optind;
 230     argv += optind;
 231
 232     switch (argc) {
 233     case 0:
 234         return xasprintf("unix:%s/db.sock", ovs_rundir());
 235
 236     case 1:
 237         return xstrdup(argv[0]);
 238
 239     default:
 240         VLOG_FATAL("at most one non-option argument accepted; "
 241                    "use --help for usage");
 242     }
 243 }
 244
 245 static void
 246 usage(void)
 247 {
 248     printf("%s: Open vSwitch daemon\n"
 249            "usage: %s [OPTIONS] [DATABASE]\n"
 250            "where DATABASE is a socket on which ovsdb-server is listening\n"
 251            "      (default: \"unix:%s/db.sock\").\n",
 252            program_name, program_name, ovs_rundir());
 253     stream_usage("DATABASE", true, false, true);
 254     daemon_usage();
 255     vlog_usage();
 256     printf("\nOther options:\n"
 257            "  --unixctl=SOCKET        override default control socket name\n"
 258            "  -h, --help              display this help message\n"
 259            "  -V, --version           display version information\n");
 260     leak_checker_usage();
 261     exit(EXIT_SUCCESS);
 262 }
 263
 264 static void
 265 ovs_vswitchd_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
 266                   const char *argv[] OVS_UNUSED, void *exiting_)
 267 {
 268     bool *exiting = exiting_;
 269     *exiting = true;
 270     unixctl_command_reply(conn, NULL);
 271 }