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 "leak-checker.h"
  35 #include "netdev.h"
  36 #include "ovsdb-idl.h"
  37 #include "poll-loop.h"
  38 #include "proc-net-compat.h"
  39 #include "process.h"
  40 #include "signals.h"
  41 #include "stream-ssl.h"
  42 #include "stream.h"
  43 #include "svec.h"
  44 #include "timeval.h"
  45 #include "unixctl.h"
  46 #include "util.h"
  47 #include "vconn.h"
  48 #include "vswitchd/vswitch-idl.h"
  49
  50 #include "vlog.h"
  51 #define THIS_MODULE VLM_vswitchd
  52
  53 static const char *parse_options(int argc, char *argv[]);
  54 static void usage(void) NO_RETURN;
  55
  56 int
  57 main(int argc, char *argv[])
  58 {
  59     struct unixctl_server *unixctl;
  60     struct signal *sighup;
  61     struct ovsdb_idl *idl;
  62     const char *remote;
  63     bool need_reconfigure;
  64     bool inited;
  65     unsigned int idl_seqno;
  66     int retval;
  67
  68     proctitle_init(argc, argv);
  69     set_program_name(argv[0]);
  70     time_init();
  71     vlog_init();
  72     remote = parse_options(argc, argv);
  73     signal(SIGPIPE, SIG_IGN);
  74     sighup = signal_register(SIGHUP);
  75     process_init();
  76     ovsrec_init();
  77
  78     die_if_already_running();
  79     daemonize_start();
  80
  81     retval = unixctl_server_create(NULL, &unixctl);
  82     if (retval) {
  83         exit(EXIT_FAILURE);
  84     }
  85
  86     daemonize_complete();
  87
  88     idl = ovsdb_idl_create(remote, &ovsrec_idl_class);
  89     idl_seqno = ovsdb_idl_get_seqno(idl);
  90
  91     need_reconfigure = false;
  92     inited = false;
  93     for (;;) {
  94         if (signal_poll(sighup)) {
  95             vlog_reopen_log_file();
  96         }
  97         if (inited && bridge_run()) {
  98             need_reconfigure = true;
  99         }
 100         ovsdb_idl_run(idl);
 101         if (idl_seqno != ovsdb_idl_get_seqno(idl)) {
 102             idl_seqno = ovsdb_idl_get_seqno(idl);
 103             need_reconfigure = true;
 104         }
 105         if (need_reconfigure) {
 106             const struct ovsrec_open_vswitch *cfg;
 107
 108             need_reconfigure = false;
 109             cfg = ovsrec_open_vswitch_first(idl);
 110             if (cfg) {
 111                 if (inited) {
 112                     bridge_reconfigure(cfg);
 113                 } else {
 114                     bridge_init(cfg);
 115                     inited = true;
 116                 }
 117             }
 118         }
 119         unixctl_server_run(unixctl);
 120         dp_run();
 121         netdev_run();
 122
 123         signal_wait(sighup);
 124         if (inited) {
 125             bridge_wait();
 126         }
 127         ovsdb_idl_wait(idl);
 128         unixctl_server_wait(unixctl);
 129         dp_wait();
 130         netdev_wait();
 131         poll_block();
 132     }
 133
 134     return 0;
 135 }
 136
 137 static const char *
 138 parse_options(int argc, char *argv[])
 139 {
 140     enum {
 141         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 142         OPT_MLOCKALL,
 143         OPT_FAKE_PROC_NET,
 144         VLOG_OPTION_ENUMS,
 145         LEAK_CHECKER_OPTION_ENUMS,
 146         OPT_BOOTSTRAP_CA_CERT
 147     };
 148     static struct option long_options[] = {
 149         {"help",        no_argument, 0, 'h'},
 150         {"version",     no_argument, 0, 'V'},
 151         {"mlockall",    no_argument, 0, OPT_MLOCKALL},
 152         {"fake-proc-net", no_argument, 0, OPT_FAKE_PROC_NET},
 153         DAEMON_LONG_OPTIONS,
 154         VLOG_LONG_OPTIONS,
 155         LEAK_CHECKER_LONG_OPTIONS,
 156 #ifdef HAVE_OPENSSL
 157         STREAM_SSL_LONG_OPTIONS
 158         {"peer-ca-cert", required_argument, 0, OPT_PEER_CA_CERT},
 159         {"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
 160 #endif
 161         {0, 0, 0, 0},
 162     };
 163     char *short_options = long_options_to_short_options(long_options);
 164     int error;
 165
 166     for (;;) {
 167         int c;
 168
 169         c = getopt_long(argc, argv, short_options, long_options, NULL);
 170         if (c == -1) {
 171             break;
 172         }
 173
 174         switch (c) {
 175         case 'H':
 176         case 'h':
 177             usage();
 178
 179         case 'V':
 180             OVS_PRINT_VERSION(OFP_VERSION, OFP_VERSION);
 181             exit(EXIT_SUCCESS);
 182
 183         case OPT_MLOCKALL:
 184 #ifdef HAVE_MLOCKALL
 185             if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
 186                 VLOG_ERR("mlockall failed: %s", strerror(errno));
 187             }
 188 #else
 189             VLOG_ERR("mlockall not supported on this system");
 190 #endif
 191             break;
 192
 193         case OPT_FAKE_PROC_NET:
 194             error = proc_net_compat_init();
 195             if (error) {
 196                 ovs_fatal(error, "failed to initialize /proc/net "
 197                           "compatibility");
 198             }
 199             break;
 200
 201         VLOG_OPTION_HANDLERS
 202         DAEMON_OPTION_HANDLERS
 203         LEAK_CHECKER_OPTION_HANDLERS
 204
 205 #ifdef HAVE_OPENSSL
 206         STREAM_SSL_OPTION_HANDLERS
 207
 208         case OPT_PEER_CA_CERT:
 209             stream_ssl_set_peer_ca_cert_file(optarg);
 210             break;
 211
 212         case OPT_BOOTSTRAP_CA_CERT:
 213             stream_ssl_set_ca_cert_file(optarg, true);
 214             break;
 215 #endif
 216
 217         case '?':
 218             exit(EXIT_FAILURE);
 219
 220         default:
 221             abort();
 222         }
 223     }
 224     free(short_options);
 225
 226     argc -= optind;
 227     argv += optind;
 228
 229     if (argc != 1) {
 230         ovs_fatal(0, "database socket is only non-option argument; "
 231                 "use --help for usage");
 232     }
 233
 234     return argv[0];
 235 }
 236
 237 static void
 238 usage(void)
 239 {
 240     printf("%s: Open vSwitch daemon\n"
 241            "usage: %s [OPTIONS] DATABASE\n"
 242            "where DATABASE is a socket on which ovsdb-server is listening.\n",
 243            program_name, program_name);
 244     stream_usage("DATABASE", true, false, true);
 245     daemon_usage();
 246     vlog_usage();
 247     printf("\nLegacy compatibility options:\n"
 248            " --fake-proc-net          simulate some files in /proc/net\n"
 249            "\nOther options:\n"
 250            "  -h, --help              display this help message\n"
 251            "  -V, --version           display version information\n");
 252     leak_checker_usage();
 253     exit(EXIT_SUCCESS);
 254 }