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     VLOG_INFO("%s (Open vSwitch) %s", program_name, VERSION);
  89
  90     if (want_mlockall) {
  91 #ifdef HAVE_MLOCKALL
  92         if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
  93             VLOG_ERR("mlockall failed: %s", strerror(errno));
  94         }
  95 #else
  96         VLOG_ERR("mlockall not supported on this system");
  97 #endif
  98     }
  99
 100     retval = unixctl_server_create(unixctl_path, &unixctl);
 101     if (retval) {
 102         exit(EXIT_FAILURE);
 103     }
 104     unixctl_command_register("exit", "", 0, 0, ovs_vswitchd_exit, &exiting);
 105
 106     bridge_init(remote);
 107     free(remote);
 108
 109     exiting = false;
 110     while (!exiting) {
 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         signal_wait(sighup);
 130         memory_wait();
 131         bridge_wait();
 132         unixctl_server_wait(unixctl);
 133         netdev_wait();
 134         if (exiting) {
 135             poll_immediate_wake();
 136         }
 137         poll_block();
 138     }
 139     bridge_exit();
 140     unixctl_server_destroy(unixctl);
 141     signal_unregister(sighup);
 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         LEAK_CHECKER_OPTION_ENUMS,
 155         OPT_BOOTSTRAP_CA_CERT,
 156         OPT_ENABLE_DUMMY,
 157         OPT_DISABLE_SYSTEM,
 158         DAEMON_OPTION_ENUMS
 159     };
 160     static struct option long_options[] = {
 161         {"help",        no_argument, NULL, 'h'},
 162         {"version",     no_argument, NULL, 'V'},
 163         {"mlockall",    no_argument, NULL, OPT_MLOCKALL},
 164         {"unixctl",     required_argument, NULL, OPT_UNIXCTL},
 165         DAEMON_LONG_OPTIONS,
 166         VLOG_LONG_OPTIONS,
 167         LEAK_CHECKER_LONG_OPTIONS,
 168         STREAM_SSL_LONG_OPTIONS,
 169         {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
 170         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
 171         {"enable-dummy", optional_argument, NULL, OPT_ENABLE_DUMMY},
 172         {"disable-system", no_argument, NULL, OPT_DISABLE_SYSTEM},
 173         {NULL, 0, NULL, 0},
 174     };
 175     char *short_options = long_options_to_short_options(long_options);
 176
 177     for (;;) {
 178         int c;
 179
 180         c = getopt_long(argc, argv, short_options, long_options, NULL);
 181         if (c == -1) {
 182             break;
 183         }
 184
 185         switch (c) {
 186         case 'h':
 187             usage();
 188
 189         case 'V':
 190             ovs_print_version(OFP10_VERSION, OFP10_VERSION);
 191             exit(EXIT_SUCCESS);
 192
 193         case OPT_MLOCKALL:
 194             want_mlockall = true;
 195             break;
 196
 197         case OPT_UNIXCTL:
 198             *unixctl_pathp = optarg;
 199             break;
 200
 201         VLOG_OPTION_HANDLERS
 202         DAEMON_OPTION_HANDLERS
 203         LEAK_CHECKER_OPTION_HANDLERS
 204         STREAM_SSL_OPTION_HANDLERS
 205
 206         case OPT_PEER_CA_CERT:
 207             stream_ssl_set_peer_ca_cert_file(optarg);
 208             break;
 209
 210         case OPT_BOOTSTRAP_CA_CERT:
 211             stream_ssl_set_ca_cert_file(optarg, true);
 212             break;
 213
 214         case OPT_ENABLE_DUMMY:
 215             dummy_enable(optarg && !strcmp(optarg, "override"));
 216             break;
 217
 218         case OPT_DISABLE_SYSTEM:
 219             dp_blacklist_provider("system");
 220             break;
 221
 222         case '?':
 223             exit(EXIT_FAILURE);
 224
 225         default:
 226             abort();
 227         }
 228     }
 229     free(short_options);
 230
 231     argc -= optind;
 232     argv += optind;
 233
 234     switch (argc) {
 235     case 0:
 236         return xasprintf("unix:%s/db.sock", ovs_rundir());
 237
 238     case 1:
 239         return xstrdup(argv[0]);
 240
 241     default:
 242         VLOG_FATAL("at most one non-option argument accepted; "
 243                    "use --help for usage");
 244     }
 245 }
 246
 247 static void
 248 usage(void)
 249 {
 250     printf("%s: Open vSwitch daemon\n"
 251            "usage: %s [OPTIONS] [DATABASE]\n"
 252            "where DATABASE is a socket on which ovsdb-server is listening\n"
 253            "      (default: \"unix:%s/db.sock\").\n",
 254            program_name, program_name, ovs_rundir());
 255     stream_usage("DATABASE", true, false, true);
 256     daemon_usage();
 257     vlog_usage();
 258     printf("\nOther options:\n"
 259            "  --unixctl=SOCKET        override default control socket name\n"
 260            "  -h, --help              display this help message\n"
 261            "  -V, --version           display version information\n");
 262     leak_checker_usage();
 263     exit(EXIT_SUCCESS);
 264 }
 265
 266 static void
 267 ovs_vswitchd_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
 268                   const char *argv[] OVS_UNUSED, void *exiting_)
 269 {
 270     bool *exiting = exiting_;
 271     *exiting = true;
 272     unixctl_command_reply(conn, NULL);
 273 }