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