vswitchd/ovs-vswitchd.c

   1 /* Copyright (c) 2008, 2009, 2010 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 "dpif.h"
  34 #include "dummy.h"
  35 #include "leak-checker.h"
  36 #include "netdev.h"
  37 #include "ovsdb-idl.h"
  38 #include "poll-loop.h"
  39 #include "proc-net-compat.h"
  40 #include "process.h"
  41 #include "signals.h"
  42 #include "stream-ssl.h"
  43 #include "stream.h"
  44 #include "svec.h"
  45 #include "timeval.h"
  46 #include "unixctl.h"
  47 #include "util.h"
  48 #include "vconn.h"
  49 #include "vlog.h"
  50 #include "vswitchd/vswitch-idl.h"
  51
  52 VLOG_DEFINE_THIS_MODULE(vswitchd);
  53
  54 static unixctl_cb_func ovs_vswitchd_exit;
  55
  56 static const char *parse_options(int argc, char *argv[]);
  57 static void usage(void) NO_RETURN;
  58
  59 int
  60 main(int argc, char *argv[])
  61 {
  62     struct unixctl_server *unixctl;
  63     struct signal *sighup;
  64     const char *remote;
  65     bool exiting;
  66     int retval;
  67
  68     proctitle_init(argc, argv);
  69     set_program_name(argv[0]);
  70     remote = parse_options(argc, argv);
  71     signal(SIGPIPE, SIG_IGN);
  72     sighup = signal_register(SIGHUP);
  73     process_init();
  74     ovsrec_init();
  75
  76     die_if_already_running();
  77     daemonize_start();
  78
  79     retval = unixctl_server_create(NULL, &unixctl);
  80     if (retval) {
  81         exit(EXIT_FAILURE);
  82     }
  83     unixctl_command_register("exit", ovs_vswitchd_exit, &exiting);
  84
  85     daemonize_complete();
  86
  87     bridge_init(remote);
  88     exiting = false;
  89     while (!exiting) {
  90         if (signal_poll(sighup)) {
  91             vlog_reopen_log_file();
  92         }
  93         bridge_run();
  94         unixctl_server_run(unixctl);
  95         dp_run();
  96         netdev_run();
  97
  98         signal_wait(sighup);
  99         bridge_wait();
 100         unixctl_server_wait(unixctl);
 101         dp_wait();
 102         netdev_wait();
 103         if (exiting) {
 104             poll_immediate_wake();
 105         }
 106         poll_block();
 107     }
 108
 109     return 0;
 110 }
 111
 112 static const char *
 113 parse_options(int argc, char *argv[])
 114 {
 115     enum {
 116         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 117         OPT_MLOCKALL,
 118         OPT_FAKE_PROC_NET,
 119         VLOG_OPTION_ENUMS,
 120         LEAK_CHECKER_OPTION_ENUMS,
 121         OPT_BOOTSTRAP_CA_CERT,
 122         OPT_ENABLE_DUMMY
 123     };
 124     static struct option long_options[] = {
 125         {"help",        no_argument, 0, 'h'},
 126         {"version",     no_argument, 0, 'V'},
 127         {"mlockall",    no_argument, 0, OPT_MLOCKALL},
 128         {"fake-proc-net", no_argument, 0, OPT_FAKE_PROC_NET},
 129         DAEMON_LONG_OPTIONS,
 130         VLOG_LONG_OPTIONS,
 131         LEAK_CHECKER_LONG_OPTIONS,
 132 #ifdef HAVE_OPENSSL
 133         STREAM_SSL_LONG_OPTIONS
 134         {"peer-ca-cert", required_argument, 0, OPT_PEER_CA_CERT},
 135         {"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
 136 #endif
 137         {"enable-dummy", no_argument, 0, OPT_ENABLE_DUMMY},
 138         {0, 0, 0, 0},
 139     };
 140     char *short_options = long_options_to_short_options(long_options);
 141     int error;
 142
 143     for (;;) {
 144         int c;
 145
 146         c = getopt_long(argc, argv, short_options, long_options, NULL);
 147         if (c == -1) {
 148             break;
 149         }
 150
 151         switch (c) {
 152         case 'H':
 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         case OPT_FAKE_PROC_NET:
 171             error = proc_net_compat_init();
 172             if (error) {
 173                 ovs_fatal(error, "failed to initialize /proc/net "
 174                           "compatibility");
 175             }
 176             break;
 177
 178         VLOG_OPTION_HANDLERS
 179         DAEMON_OPTION_HANDLERS
 180         LEAK_CHECKER_OPTION_HANDLERS
 181
 182 #ifdef HAVE_OPENSSL
 183         STREAM_SSL_OPTION_HANDLERS
 184
 185         case OPT_PEER_CA_CERT:
 186             stream_ssl_set_peer_ca_cert_file(optarg);
 187             break;
 188
 189         case OPT_BOOTSTRAP_CA_CERT:
 190             stream_ssl_set_ca_cert_file(optarg, true);
 191             break;
 192 #endif
 193
 194         case OPT_ENABLE_DUMMY:
 195             dummy_enable();
 196             break;
 197
 198         case '?':
 199             exit(EXIT_FAILURE);
 200
 201         default:
 202             abort();
 203         }
 204     }
 205     free(short_options);
 206
 207     argc -= optind;
 208     argv += optind;
 209
 210     if (argc != 1) {
 211         ovs_fatal(0, "database socket is only non-option argument; "
 212                 "use --help for usage");
 213     }
 214
 215     return argv[0];
 216 }
 217
 218 static void
 219 usage(void)
 220 {
 221     printf("%s: Open vSwitch daemon\n"
 222            "usage: %s [OPTIONS] DATABASE\n"
 223            "where DATABASE is a socket on which ovsdb-server is listening.\n",
 224            program_name, program_name);
 225     stream_usage("DATABASE", true, false, true);
 226     daemon_usage();
 227     vlog_usage();
 228     printf("\nLegacy compatibility options:\n"
 229            " --fake-proc-net          simulate some files in /proc/net\n"
 230            "\nOther options:\n"
 231            "  -h, --help              display this help message\n"
 232            "  -V, --version           display version information\n");
 233     leak_checker_usage();
 234     exit(EXIT_SUCCESS);
 235 }
 236
 237 static void
 238 ovs_vswitchd_exit(struct unixctl_conn *conn, const char *args OVS_UNUSED,
 239                   void *exiting_)
 240 {
 241     bool *exiting = exiting_;
 242     *exiting = true;
 243     unixctl_command_reply(conn, 200, NULL);
 244 }