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
  26 #include "bridge.h"
  27 #include "command-line.h"
  28 #include "compiler.h"
  29 #include "daemon.h"
  30 #include "dpif.h"
  31 #include "leak-checker.h"
  32 #include "netdev.h"
  33 #include "ovsdb-idl.h"
  34 #include "poll-loop.h"
  35 #include "proc-net-compat.h"
  36 #include "process.h"
  37 #include "signals.h"
  38 #include "stream-ssl.h"
  39 #include "stream.h"
  40 #include "svec.h"
  41 #include "timeval.h"
  42 #include "unixctl.h"
  43 #include "util.h"
  44 #include "vconn.h"
  45 #include "vswitchd/vswitch-idl.h"
  46
  47 #include "vlog.h"
  48 #define THIS_MODULE VLM_vswitchd
  49
  50 static const char *parse_options(int argc, char *argv[]);
  51 static void usage(void) NO_RETURN;
  52
  53 int
  54 main(int argc, char *argv[])
  55 {
  56     struct unixctl_server *unixctl;
  57     struct signal *sighup;
  58     struct ovsdb_idl *idl;
  59     const char *remote;
  60     bool need_reconfigure;
  61     bool inited;
  62     unsigned int idl_seqno;
  63     int retval;
  64
  65     proctitle_init(argc, argv);
  66     set_program_name(argv[0]);
  67     time_init();
  68     vlog_init();
  69     remote = parse_options(argc, argv);
  70     signal(SIGPIPE, SIG_IGN);
  71     sighup = signal_register(SIGHUP);
  72     process_init();
  73     ovsrec_init();
  74
  75     die_if_already_running();
  76     daemonize_start();
  77
  78     retval = unixctl_server_create(NULL, &unixctl);
  79     if (retval) {
  80         exit(EXIT_FAILURE);
  81     }
  82
  83     daemonize_complete();
  84
  85     idl = ovsdb_idl_create(remote, &ovsrec_idl_class);
  86     idl_seqno = ovsdb_idl_get_seqno(idl);
  87
  88     need_reconfigure = false;
  89     inited = false;
  90     for (;;) {
  91         if (signal_poll(sighup)) {
  92             vlog_reopen_log_file();
  93         }
  94         if (inited && bridge_run()) {
  95             need_reconfigure = true;
  96         }
  97         ovsdb_idl_run(idl);
  98         if (idl_seqno != ovsdb_idl_get_seqno(idl)) {
  99             idl_seqno = ovsdb_idl_get_seqno(idl);
 100             need_reconfigure = true;
 101         }
 102         if (need_reconfigure) {
 103             const struct ovsrec_open_vswitch *cfg;
 104
 105             need_reconfigure = false;
 106             cfg = ovsrec_open_vswitch_first(idl);
 107             if (cfg) {
 108                 if (inited) {
 109                     bridge_reconfigure(cfg);
 110                 } else {
 111                     bridge_init(cfg);
 112                     inited = true;
 113                 }
 114             }
 115         }
 116         unixctl_server_run(unixctl);
 117         dp_run();
 118         netdev_run();
 119
 120         signal_wait(sighup);
 121         if (inited) {
 122             bridge_wait();
 123         }
 124         ovsdb_idl_wait(idl);
 125         unixctl_server_wait(unixctl);
 126         dp_wait();
 127         netdev_wait();
 128         poll_block();
 129     }
 130
 131     return 0;
 132 }
 133
 134 static const char *
 135 parse_options(int argc, char *argv[])
 136 {
 137     enum {
 138         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 139         OPT_FAKE_PROC_NET,
 140         VLOG_OPTION_ENUMS,
 141         LEAK_CHECKER_OPTION_ENUMS,
 142         OPT_BOOTSTRAP_CA_CERT
 143     };
 144     static struct option long_options[] = {
 145         {"help",        no_argument, 0, 'h'},
 146         {"version",     no_argument, 0, 'V'},
 147         {"fake-proc-net", no_argument, 0, OPT_FAKE_PROC_NET},
 148         DAEMON_LONG_OPTIONS,
 149         VLOG_LONG_OPTIONS,
 150         LEAK_CHECKER_LONG_OPTIONS,
 151 #ifdef HAVE_OPENSSL
 152         STREAM_SSL_LONG_OPTIONS
 153         {"peer-ca-cert", required_argument, 0, OPT_PEER_CA_CERT},
 154         {"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
 155 #endif
 156         {0, 0, 0, 0},
 157     };
 158     char *short_options = long_options_to_short_options(long_options);
 159     int error;
 160
 161     for (;;) {
 162         int c;
 163
 164         c = getopt_long(argc, argv, short_options, long_options, NULL);
 165         if (c == -1) {
 166             break;
 167         }
 168
 169         switch (c) {
 170         case 'H':
 171         case 'h':
 172             usage();
 173
 174         case 'V':
 175             OVS_PRINT_VERSION(OFP_VERSION, OFP_VERSION);
 176             exit(EXIT_SUCCESS);
 177
 178         case OPT_FAKE_PROC_NET:
 179             error = proc_net_compat_init();
 180             if (error) {
 181                 ovs_fatal(error, "failed to initialize /proc/net "
 182                           "compatibility");
 183             }
 184             break;
 185
 186         VLOG_OPTION_HANDLERS
 187         DAEMON_OPTION_HANDLERS
 188         LEAK_CHECKER_OPTION_HANDLERS
 189
 190 #ifdef HAVE_OPENSSL
 191         STREAM_SSL_OPTION_HANDLERS
 192
 193         case OPT_PEER_CA_CERT:
 194             stream_ssl_set_peer_ca_cert_file(optarg);
 195             break;
 196
 197         case OPT_BOOTSTRAP_CA_CERT:
 198             stream_ssl_set_ca_cert_file(optarg, true);
 199             break;
 200 #endif
 201
 202         case '?':
 203             exit(EXIT_FAILURE);
 204
 205         default:
 206             abort();
 207         }
 208     }
 209     free(short_options);
 210
 211     argc -= optind;
 212     argv += optind;
 213
 214     if (argc != 1) {
 215         ovs_fatal(0, "database socket is only non-option argument; "
 216                 "use --help for usage");
 217     }
 218
 219     return argv[0];
 220 }
 221
 222 static void
 223 usage(void)
 224 {
 225     printf("%s: Open vSwitch daemon\n"
 226            "usage: %s [OPTIONS] DATABASE\n"
 227            "where DATABASE is a socket on which ovsdb-server is listening.\n",
 228            program_name, program_name);
 229     stream_usage("DATABASE", true, false, true);
 230     daemon_usage();
 231     vlog_usage();
 232     printf("\nLegacy compatibility options:\n"
 233            " --fake-proc-net          simulate some files in /proc/net\n"
 234            "\nOther options:\n"
 235            "  -h, --help              display this help message\n"
 236            "  -V, --version           display version information\n");
 237     leak_checker_usage();
 238     exit(EXIT_SUCCESS);
 239 }