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 unixctl_cb_func ovs_vswitchd_exit;
  54
  55 static const char *parse_options(int argc, char *argv[]);
  56 static void usage(void) NO_RETURN;
  57
  58 int
  59 main(int argc, char *argv[])
  60 {
  61     struct unixctl_server *unixctl;
  62     struct signal *sighup;
  63     struct ovsdb_idl *idl;
  64     const char *remote;
  65     bool inited, exiting;
  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     unixctl_command_register("exit", ovs_vswitchd_exit, &exiting);
  86
  87     daemonize_complete();
  88
  89     idl = ovsdb_idl_create(remote, &ovsrec_idl_class);
  90
  91     inited = false;
  92     exiting = false;
  93     while (!exiting) {
  94         bool need_reconfigure;
  95
  96         if (signal_poll(sighup)) {
  97             vlog_reopen_log_file();
  98         }
  99
 100         need_reconfigure = false;
 101         if (inited && bridge_run()) {
 102             need_reconfigure = true;
 103         }
 104         if (ovsdb_idl_run(idl)) {
 105             need_reconfigure = true;
 106         }
 107
 108         if (need_reconfigure) {
 109             const struct ovsrec_open_vswitch *cfg;
 110
 111             cfg = ovsrec_open_vswitch_first(idl);
 112             if (cfg) {
 113                 if (inited) {
 114                     bridge_reconfigure(cfg);
 115                 } else {
 116                     bridge_init(cfg);
 117                     inited = true;
 118                 }
 119             }
 120         }
 121         unixctl_server_run(unixctl);
 122         dp_run();
 123         netdev_run();
 124
 125         signal_wait(sighup);
 126         if (inited) {
 127             bridge_wait();
 128         }
 129         ovsdb_idl_wait(idl);
 130         unixctl_server_wait(unixctl);
 131         dp_wait();
 132         netdev_wait();
 133         poll_block();
 134     }
 135
 136     return 0;
 137 }
 138
 139 static const char *
 140 parse_options(int argc, char *argv[])
 141 {
 142     enum {
 143         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 144         OPT_MLOCKALL,
 145         OPT_FAKE_PROC_NET,
 146         VLOG_OPTION_ENUMS,
 147         LEAK_CHECKER_OPTION_ENUMS,
 148         OPT_BOOTSTRAP_CA_CERT
 149     };
 150     static struct option long_options[] = {
 151         {"help",        no_argument, 0, 'h'},
 152         {"version",     no_argument, 0, 'V'},
 153         {"mlockall",    no_argument, 0, OPT_MLOCKALL},
 154         {"fake-proc-net", no_argument, 0, OPT_FAKE_PROC_NET},
 155         DAEMON_LONG_OPTIONS,
 156         VLOG_LONG_OPTIONS,
 157         LEAK_CHECKER_LONG_OPTIONS,
 158 #ifdef HAVE_OPENSSL
 159         STREAM_SSL_LONG_OPTIONS
 160         {"peer-ca-cert", required_argument, 0, OPT_PEER_CA_CERT},
 161         {"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
 162 #endif
 163         {0, 0, 0, 0},
 164     };
 165     char *short_options = long_options_to_short_options(long_options);
 166     int error;
 167
 168     for (;;) {
 169         int c;
 170
 171         c = getopt_long(argc, argv, short_options, long_options, NULL);
 172         if (c == -1) {
 173             break;
 174         }
 175
 176         switch (c) {
 177         case 'H':
 178         case 'h':
 179             usage();
 180
 181         case 'V':
 182             OVS_PRINT_VERSION(OFP_VERSION, OFP_VERSION);
 183             exit(EXIT_SUCCESS);
 184
 185         case OPT_MLOCKALL:
 186 #ifdef HAVE_MLOCKALL
 187             if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
 188                 VLOG_ERR("mlockall failed: %s", strerror(errno));
 189             }
 190 #else
 191             VLOG_ERR("mlockall not supported on this system");
 192 #endif
 193             break;
 194
 195         case OPT_FAKE_PROC_NET:
 196             error = proc_net_compat_init();
 197             if (error) {
 198                 ovs_fatal(error, "failed to initialize /proc/net "
 199                           "compatibility");
 200             }
 201             break;
 202
 203         VLOG_OPTION_HANDLERS
 204         DAEMON_OPTION_HANDLERS
 205         LEAK_CHECKER_OPTION_HANDLERS
 206
 207 #ifdef HAVE_OPENSSL
 208         STREAM_SSL_OPTION_HANDLERS
 209
 210         case OPT_PEER_CA_CERT:
 211             stream_ssl_set_peer_ca_cert_file(optarg);
 212             break;
 213
 214         case OPT_BOOTSTRAP_CA_CERT:
 215             stream_ssl_set_ca_cert_file(optarg, true);
 216             break;
 217 #endif
 218
 219         case '?':
 220             exit(EXIT_FAILURE);
 221
 222         default:
 223             abort();
 224         }
 225     }
 226     free(short_options);
 227
 228     argc -= optind;
 229     argv += optind;
 230
 231     if (argc != 1) {
 232         ovs_fatal(0, "database socket is only non-option argument; "
 233                 "use --help for usage");
 234     }
 235
 236     return argv[0];
 237 }
 238
 239 static void
 240 usage(void)
 241 {
 242     printf("%s: Open vSwitch daemon\n"
 243            "usage: %s [OPTIONS] DATABASE\n"
 244            "where DATABASE is a socket on which ovsdb-server is listening.\n",
 245            program_name, program_name);
 246     stream_usage("DATABASE", true, false, true);
 247     daemon_usage();
 248     vlog_usage();
 249     printf("\nLegacy compatibility options:\n"
 250            " --fake-proc-net          simulate some files in /proc/net\n"
 251            "\nOther options:\n"
 252            "  -h, --help              display this help message\n"
 253            "  -V, --version           display version information\n");
 254     leak_checker_usage();
 255     exit(EXIT_SUCCESS);
 256 }
 257
 258 static void
 259 ovs_vswitchd_exit(struct unixctl_conn *conn, const char *args OVS_UNUSED,
 260                   void *exiting_)
 261 {
 262     bool *exiting = exiting_;
 263     *exiting = true;
 264     unixctl_command_reply(conn, 200, NULL);
 265 }