vswitchd/ovs-vswitchd.c

   1 /* Copyright (c) 2008, 2009 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 "cfg.h"
  28 #include "command-line.h"
  29 #include "compiler.h"
  30 #include "daemon.h"
  31 #include "dpif.h"
  32 #include "fault.h"
  33 #include "leak-checker.h"
  34 #include "mgmt.h"
  35 #include "netdev.h"
  36 #include "ovs-vswitchd.h"
  37 #include "poll-loop.h"
  38 #include "proc-net-compat.h"
  39 #include "process.h"
  40 #include "signals.h"
  41 #include "svec.h"
  42 #include "timeval.h"
  43 #include "unixctl.h"
  44 #include "util.h"
  45 #include "vconn-ssl.h"
  46 #include "vconn.h"
  47
  48 #include "vlog.h"
  49 #define THIS_MODULE VLM_vswitchd
  50
  51 static void parse_options(int argc, char *argv[]);
  52 static void usage(void) NO_RETURN;
  53 static unixctl_cb_func reload;
  54
  55 static bool need_reconfigure;
  56 static struct unixctl_conn **conns;
  57 static size_t n_conns;
  58
  59 int
  60 main(int argc, char *argv[])
  61 {
  62     struct unixctl_server *unixctl;
  63     struct signal *sighup;
  64     int retval;
  65
  66     set_program_name(argv[0]);
  67     register_fault_handlers();
  68     time_init();
  69     vlog_init();
  70     parse_options(argc, argv);
  71     signal(SIGPIPE, SIG_IGN);
  72     sighup = signal_register(SIGHUP);
  73     process_init();
  74
  75     die_if_already_running();
  76     daemonize();
  77
  78     retval = unixctl_server_create(NULL, &unixctl);
  79     if (retval) {
  80         ovs_fatal(retval, "could not listen for control connections");
  81     }
  82     unixctl_command_register("vswitchd/reload", reload, NULL);
  83
  84     retval = cfg_read();
  85     if (retval) {
  86         ovs_fatal(retval, "could not read config file");
  87     }
  88     mgmt_init();
  89     bridge_init();
  90     mgmt_reconfigure();
  91
  92     need_reconfigure = false;
  93     for (;;) {
  94         if (need_reconfigure || signal_poll(sighup)) {
  95             need_reconfigure = false;
  96             vlog_reopen_log_file();
  97             reconfigure();
  98         }
  99         if (mgmt_run()) {
 100             need_reconfigure = true;
 101         }
 102         if (bridge_run()) {
 103             need_reconfigure = true;
 104         }
 105         unixctl_server_run(unixctl);
 106         dp_run();
 107         netdev_run();
 108
 109         if (need_reconfigure) {
 110             poll_immediate_wake();
 111         }
 112         signal_wait(sighup);
 113         mgmt_wait();
 114         bridge_wait();
 115         unixctl_server_wait(unixctl);
 116         dp_wait();
 117         netdev_wait();
 118         poll_block();
 119     }
 120
 121     return 0;
 122 }
 123
 124 static void
 125 reload(struct unixctl_conn *conn, const char *args UNUSED, void *aux UNUSED)
 126 {
 127     need_reconfigure = true;
 128     conns = xrealloc(conns, sizeof *conns * (n_conns + 1));
 129     conns[n_conns++] = conn;
 130 }
 131
 132 void
 133 reconfigure(void)
 134 {
 135     size_t i;
 136
 137     cfg_read();
 138     bridge_reconfigure();
 139     mgmt_reconfigure();
 140
 141     for (i = 0; i < n_conns; i++) {
 142         unixctl_command_reply(conns[i], 202, NULL);
 143     }
 144     free(conns);
 145     conns = NULL;
 146     n_conns = 0;
 147 }
 148
 149 static void
 150 parse_options(int argc, char *argv[])
 151 {
 152     enum {
 153         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 154         OPT_FAKE_PROC_NET,
 155         VLOG_OPTION_ENUMS,
 156         LEAK_CHECKER_OPTION_ENUMS
 157     };
 158     static struct option long_options[] = {
 159         {"help",        no_argument, 0, 'h'},
 160         {"version",     no_argument, 0, 'V'},
 161         {"fake-proc-net", no_argument, 0, OPT_FAKE_PROC_NET},
 162         DAEMON_LONG_OPTIONS,
 163         VLOG_LONG_OPTIONS,
 164         LEAK_CHECKER_LONG_OPTIONS,
 165 #ifdef HAVE_OPENSSL
 166         VCONN_SSL_LONG_OPTIONS
 167         {"peer-ca-cert", required_argument, 0, OPT_PEER_CA_CERT},
 168 #endif
 169         {0, 0, 0, 0},
 170     };
 171     char *short_options = long_options_to_short_options(long_options);
 172     const char *config_file;
 173     int error;
 174
 175     for (;;) {
 176         int c;
 177
 178         c = getopt_long(argc, argv, short_options, long_options, NULL);
 179         if (c == -1) {
 180             break;
 181         }
 182
 183         switch (c) {
 184         case 'H':
 185         case 'h':
 186             usage();
 187
 188         case 'V':
 189             OVS_PRINT_VERSION(OFP_VERSION, OFP_VERSION);
 190             exit(EXIT_SUCCESS);
 191
 192         case OPT_FAKE_PROC_NET:
 193             error = proc_net_compat_init();
 194             if (error) {
 195                 ovs_fatal(error, "failed to initialize /proc/net "
 196                           "compatibility");
 197             }
 198             break;
 199
 200         VLOG_OPTION_HANDLERS
 201         DAEMON_OPTION_HANDLERS
 202         VCONN_SSL_OPTION_HANDLERS
 203         LEAK_CHECKER_OPTION_HANDLERS
 204
 205 #ifdef HAVE_OPENSSL
 206         case OPT_PEER_CA_CERT:
 207             vconn_ssl_set_peer_ca_cert_file(optarg);
 208             break;
 209 #endif
 210
 211         case '?':
 212             exit(EXIT_FAILURE);
 213
 214         default:
 215             abort();
 216         }
 217     }
 218     free(short_options);
 219
 220     argc -= optind;
 221     argv += optind;
 222
 223     if (argc != 1) {
 224         ovs_fatal(0, "config file is only non-option argument; "
 225                 "use --help for usage");
 226     }
 227
 228     cfg_init();
 229     config_file = argv[0];
 230     error = cfg_set_file(config_file);
 231     if (error) {
 232        ovs_fatal(error, "failed to add configuration file \"%s\"",
 233                 config_file);
 234     }
 235 }
 236
 237 static void
 238 usage(void)
 239 {
 240     printf("%s: Open vSwitch daemon\n"
 241            "usage: %s [OPTIONS] CONFIG\n"
 242            "CONFIG is a configuration file in ovs-vswitchd.conf(5) format.\n",
 243            program_name, program_name);
 244     daemon_usage();
 245     vlog_usage();
 246     printf("\nLegacy compatibility options:\n"
 247            " --fake-proc-net          simulate some files in /proc/net\n"
 248            "\nOther options:\n"
 249            "  -h, --help              display this help message\n"
 250            "  -V, --version           display version information\n");
 251     leak_checker_usage();
 252     exit(EXIT_SUCCESS);
 253 }