vswitchd/ovs-vswitchd.c

   1 /* Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks
   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 "vswitchd/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[]);
  59 static void usage(void) NO_RETURN;
  60
  61 int
  62 main(int argc, char *argv[])
  63 {
  64     struct unixctl_server *unixctl;
  65     struct signal *sighup;
  66     char *remote;
  67     bool exiting;
  68     int retval;
  69
  70     proctitle_init(argc, argv);
  71     set_program_name(argv[0]);
  72     stress_init_command();
  73     remote = parse_options(argc, argv);
  74     signal(SIGPIPE, SIG_IGN);
  75     sighup = signal_register(SIGHUP);
  76     process_init();
  77     ovsrec_init();
  78
  79     daemonize_start();
  80
  81     retval = unixctl_server_create(NULL, &unixctl);
  82     if (retval) {
  83         exit(EXIT_FAILURE);
  84     }
  85     unixctl_command_register("exit", "", ovs_vswitchd_exit, &exiting);
  86
  87     bridge_init(remote);
  88     free(remote);
  89
  90     exiting = false;
  91     while (!exiting) {
  92         if (signal_poll(sighup)) {
  93             vlog_reopen_log_file();
  94         }
  95         bridge_run();
  96         unixctl_server_run(unixctl);
  97         netdev_run();
  98
  99         signal_wait(sighup);
 100         bridge_wait();
 101         unixctl_server_wait(unixctl);
 102         netdev_wait();
 103         if (exiting) {
 104             poll_immediate_wake();
 105         }
 106         poll_block();
 107     }
 108     bridge_exit();
 109     unixctl_server_destroy(unixctl);
 110     signal_unregister(sighup);
 111
 112     return 0;
 113 }
 114
 115 static char *
 116 parse_options(int argc, char *argv[])
 117 {
 118     enum {
 119         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 120         OPT_MLOCKALL,
 121         VLOG_OPTION_ENUMS,
 122         LEAK_CHECKER_OPTION_ENUMS,
 123         OPT_BOOTSTRAP_CA_CERT,
 124         OPT_ENABLE_DUMMY,
 125         OPT_DISABLE_SYSTEM,
 126         DAEMON_OPTION_ENUMS
 127     };
 128     static struct option long_options[] = {
 129         {"help",        no_argument, NULL, 'h'},
 130         {"version",     no_argument, NULL, 'V'},
 131         {"mlockall",    no_argument, NULL, OPT_MLOCKALL},
 132         DAEMON_LONG_OPTIONS,
 133         VLOG_LONG_OPTIONS,
 134         LEAK_CHECKER_LONG_OPTIONS,
 135         STREAM_SSL_LONG_OPTIONS,
 136         {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
 137         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
 138         {"enable-dummy", no_argument, NULL, OPT_ENABLE_DUMMY},
 139         {"disable-system", no_argument, NULL, OPT_DISABLE_SYSTEM},
 140         {NULL, 0, NULL, 0},
 141     };
 142     char *short_options = long_options_to_short_options(long_options);
 143
 144     for (;;) {
 145         int c;
 146
 147         c = getopt_long(argc, argv, short_options, long_options, NULL);
 148         if (c == -1) {
 149             break;
 150         }
 151
 152         switch (c) {
 153         case 'h':
 154             usage();
 155
 156         case 'V':
 157             ovs_print_version(OFP_VERSION, OFP_VERSION);
 158             exit(EXIT_SUCCESS);
 159
 160         case OPT_MLOCKALL:
 161 #ifdef HAVE_MLOCKALL
 162             if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
 163                 VLOG_ERR("mlockall failed: %s", strerror(errno));
 164             }
 165 #else
 166             VLOG_ERR("mlockall not supported on this system");
 167 #endif
 168             break;
 169
 170         VLOG_OPTION_HANDLERS
 171         DAEMON_OPTION_HANDLERS
 172         LEAK_CHECKER_OPTION_HANDLERS
 173         STREAM_SSL_OPTION_HANDLERS
 174
 175         case OPT_PEER_CA_CERT:
 176             stream_ssl_set_peer_ca_cert_file(optarg);
 177             break;
 178
 179         case OPT_BOOTSTRAP_CA_CERT:
 180             stream_ssl_set_ca_cert_file(optarg, true);
 181             break;
 182
 183         case OPT_ENABLE_DUMMY:
 184             dummy_enable();
 185             break;
 186
 187         case OPT_DISABLE_SYSTEM:
 188             dp_blacklist_provider("system");
 189             break;
 190
 191         case '?':
 192             exit(EXIT_FAILURE);
 193
 194         default:
 195             abort();
 196         }
 197     }
 198     free(short_options);
 199
 200     argc -= optind;
 201     argv += optind;
 202
 203     switch (argc) {
 204     case 0:
 205         return xasprintf("unix:%s/db.sock", ovs_rundir());
 206
 207     case 1:
 208         return xstrdup(argv[0]);
 209
 210     default:
 211         VLOG_FATAL("at most one non-option argument accepted; "
 212                    "use --help for usage");
 213     }
 214 }
 215
 216 static void
 217 usage(void)
 218 {
 219     printf("%s: Open vSwitch daemon\n"
 220            "usage: %s [OPTIONS] [DATABASE]\n"
 221            "where DATABASE is a socket on which ovsdb-server is listening\n"
 222            "      (default: \"unix:%s/db.sock\").\n",
 223            program_name, program_name, ovs_rundir());
 224     stream_usage("DATABASE", true, false, true);
 225     daemon_usage();
 226     vlog_usage();
 227     printf("\nOther options:\n"
 228            "  -h, --help              display this help message\n"
 229            "  -V, --version           display version information\n");
 230     leak_checker_usage();
 231     exit(EXIT_SUCCESS);
 232 }
 233
 234 static void
 235 ovs_vswitchd_exit(struct unixctl_conn *conn, const char *args OVS_UNUSED,
 236                   void *exiting_)
 237 {
 238     bool *exiting = exiting_;
 239     *exiting = true;
 240     unixctl_command_reply(conn, 200, NULL);
 241 }