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 "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 "lib/vswitch-idl.h"
  53 #include "worker.h"
  54
  55 VLOG_DEFINE_THIS_MODULE(vswitchd);
  56
  57 /* --mlockall: If set, locks all process memory into physical RAM, preventing
  58  * the kernel from paging any of its memory to disk. */
  59 static bool want_mlockall;
  60
  61 static unixctl_cb_func ovs_vswitchd_exit;
  62
  63 static char *parse_options(int argc, char *argv[], char **unixctl_path);
  64 static void usage(void) NO_RETURN;
  65
  66 int
  67 main(int argc, char *argv[])
  68 {
  69     char *unixctl_path = NULL;
  70     struct unixctl_server *unixctl;
  71     struct signal *sighup;
  72     char *remote;
  73     bool exiting;
  74     int retval;
  75
  76     proctitle_init(argc, argv);
  77     set_program_name(argv[0]);
  78     stress_init_command();
  79     remote = parse_options(argc, argv, &unixctl_path);
  80     signal(SIGPIPE, SIG_IGN);
  81     sighup = signal_register(SIGHUP);
  82     process_init();
  83     ovsrec_init();
  84
  85     daemonize_start();
  86
  87     if (want_mlockall) {
  88 #ifdef HAVE_MLOCKALL
  89         if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
  90             VLOG_ERR("mlockall failed: %s", ovs_strerror(errno));
  91         }
  92 #else
  93         VLOG_ERR("mlockall not supported on this system");
  94 #endif
  95     }
  96
  97     worker_start();
  98
  99     retval = unixctl_server_create(unixctl_path, &unixctl);
 100     if (retval) {
 101         exit(EXIT_FAILURE);
 102     }
 103     unixctl_command_register("exit", "", 0, 0, ovs_vswitchd_exit, &exiting);
 104
 105     bridge_init(remote);
 106     free(remote);
 107
 108     exiting = false;
 109     while (!exiting) {
 110         worker_run();
 111         if (signal_poll(sighup)) {
 112             vlog_reopen_log_file();
 113         }
 114         memory_run();
 115         if (memory_should_report()) {
 116             struct simap usage;
 117
 118             simap_init(&usage);
 119             bridge_get_memory_usage(&usage);
 120             memory_report(&usage);
 121             simap_destroy(&usage);
 122         }
 123         bridge_run_fast();
 124         bridge_run();
 125         bridge_run_fast();
 126         unixctl_server_run(unixctl);
 127         netdev_run();
 128
 129         worker_wait();
 130         signal_wait(sighup);
 131         memory_wait();
 132         bridge_wait();
 133         unixctl_server_wait(unixctl);
 134         netdev_wait();
 135         if (exiting) {
 136             poll_immediate_wake();
 137         }
 138         poll_block();
 139     }
 140     bridge_exit();
 141     unixctl_server_destroy(unixctl);
 142
 143     return 0;
 144 }
 145
 146 static char *
 147 parse_options(int argc, char *argv[], char **unixctl_pathp)
 148 {
 149     enum {
 150         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 151         OPT_MLOCKALL,
 152         OPT_UNIXCTL,
 153         VLOG_OPTION_ENUMS,
 154         OPT_BOOTSTRAP_CA_CERT,
 155         OPT_ENABLE_DUMMY,
 156         OPT_DISABLE_SYSTEM,
 157         DAEMON_OPTION_ENUMS
 158     };
 159     static const struct option long_options[] = {
 160         {"help",        no_argument, NULL, 'h'},
 161         {"version",     no_argument, NULL, 'V'},
 162         {"mlockall",    no_argument, NULL, OPT_MLOCKALL},
 163         {"unixctl",     required_argument, NULL, OPT_UNIXCTL},
 164         DAEMON_LONG_OPTIONS,
 165         VLOG_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         STREAM_SSL_OPTION_HANDLERS
 202
 203         case OPT_PEER_CA_CERT:
 204             stream_ssl_set_peer_ca_cert_file(optarg);
 205             break;
 206
 207         case OPT_BOOTSTRAP_CA_CERT:
 208             stream_ssl_set_ca_cert_file(optarg, true);
 209             break;
 210
 211         case OPT_ENABLE_DUMMY:
 212             dummy_enable(optarg && !strcmp(optarg, "override"));
 213             break;
 214
 215         case OPT_DISABLE_SYSTEM:
 216             dp_blacklist_provider("system");
 217             break;
 218
 219         case '?':
 220             exit(EXIT_FAILURE);
 221
 222         default:
 223             abort();
 224         }
 225     }
 226     free(short_options);
 227
 228     argc -= optind;
 229     argv += optind;
 230
 231     switch (argc) {
 232     case 0:
 233         return xasprintf("unix:%s/db.sock", ovs_rundir());
 234
 235     case 1:
 236         return xstrdup(argv[0]);
 237
 238     default:
 239         VLOG_FATAL("at most one non-option argument accepted; "
 240                    "use --help for usage");
 241     }
 242 }
 243
 244 static void
 245 usage(void)
 246 {
 247     printf("%s: Open vSwitch daemon\n"
 248            "usage: %s [OPTIONS] [DATABASE]\n"
 249            "where DATABASE is a socket on which ovsdb-server is listening\n"
 250            "      (default: \"unix:%s/db.sock\").\n",
 251            program_name, program_name, ovs_rundir());
 252     stream_usage("DATABASE", true, false, true);
 253     daemon_usage();
 254     vlog_usage();
 255     printf("\nOther options:\n"
 256            "  --unixctl=SOCKET        override default control socket name\n"
 257            "  -h, --help              display this help message\n"
 258            "  -V, --version           display version information\n");
 259     exit(EXIT_SUCCESS);
 260 }
 261
 262 static void
 263 ovs_vswitchd_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
 264                   const char *argv[] OVS_UNUSED, void *exiting_)
 265 {
 266     bool *exiting = exiting_;
 267     *exiting = true;
 268     unixctl_command_reply(conn, NULL);
 269 }