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 "ovs-vswitchd.h"
  36 #include "poll-loop.h"
  37 #include "port.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 void reload(struct unixctl_conn *, const char *args);
  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);
  83
  84     cfg_read();
  85     mgmt_init();
  86     bridge_init();
  87     port_init();
  88     mgmt_reconfigure();
  89
  90     need_reconfigure = false;
  91     for (;;) {
  92         if (need_reconfigure || signal_poll(sighup)) {
  93             need_reconfigure = false;
  94             vlog_reopen_log_file();
  95             reconfigure();
  96         }
  97         if (mgmt_run()) {
  98             need_reconfigure = true;
  99         }
 100         if (bridge_run()) {
 101             need_reconfigure = true;
 102         }
 103         unixctl_server_run(unixctl);
 104         dp_run();
 105
 106         if (need_reconfigure) {
 107             poll_immediate_wake();
 108         }
 109         signal_wait(sighup);
 110         mgmt_wait();
 111         bridge_wait();
 112         unixctl_server_wait(unixctl);
 113         dp_wait();
 114         poll_block();
 115     }
 116
 117     return 0;
 118 }
 119
 120 static void
 121 reload(struct unixctl_conn *conn, const char *args UNUSED)
 122 {
 123     need_reconfigure = true;
 124     conns = xrealloc(conns, sizeof *conns * (n_conns + 1));
 125     conns[n_conns++] = conn;
 126 }
 127
 128 void
 129 reconfigure(void)
 130 {
 131     size_t i;
 132
 133     cfg_read();
 134     bridge_reconfigure();
 135     mgmt_reconfigure();
 136     port_reconfigure();
 137
 138     for (i = 0; i < n_conns; i++) {
 139         unixctl_command_reply(conns[i], 202, NULL);
 140     }
 141     free(conns);
 142     conns = NULL;
 143     n_conns = 0;
 144 }
 145
 146 static void
 147 parse_options(int argc, char *argv[])
 148 {
 149     enum {
 150         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 151         OPT_FAKE_PROC_NET,
 152         VLOG_OPTION_ENUMS,
 153         LEAK_CHECKER_OPTION_ENUMS
 154     };
 155     static struct option long_options[] = {
 156         {"help",        no_argument, 0, 'h'},
 157         {"version",     no_argument, 0, 'V'},
 158         {"fake-proc-net", no_argument, 0, OPT_FAKE_PROC_NET},
 159         DAEMON_LONG_OPTIONS,
 160         VLOG_LONG_OPTIONS,
 161         LEAK_CHECKER_LONG_OPTIONS,
 162 #ifdef HAVE_OPENSSL
 163         VCONN_SSL_LONG_OPTIONS
 164         {"peer-ca-cert", required_argument, 0, OPT_PEER_CA_CERT},
 165 #endif
 166         {0, 0, 0, 0},
 167     };
 168     char *short_options = long_options_to_short_options(long_options);
 169     const char *config_file;
 170     int error;
 171
 172     for (;;) {
 173         int c;
 174
 175         c = getopt_long(argc, argv, short_options, long_options, NULL);
 176         if (c == -1) {
 177             break;
 178         }
 179
 180         switch (c) {
 181         case 'H':
 182         case 'h':
 183             usage();
 184
 185         case 'V':
 186             OVS_PRINT_VERSION(OFP_VERSION, OFP_VERSION);
 187             exit(EXIT_SUCCESS);
 188
 189         case OPT_FAKE_PROC_NET:
 190             error = proc_net_compat_init();
 191             if (error) {
 192                 ovs_fatal(error, "failed to initialize /proc/net "
 193                           "compatibility");
 194             }
 195             break;
 196
 197         VLOG_OPTION_HANDLERS
 198         DAEMON_OPTION_HANDLERS
 199         VCONN_SSL_OPTION_HANDLERS
 200         LEAK_CHECKER_OPTION_HANDLERS
 201
 202 #ifdef HAVE_OPENSSL
 203         case OPT_PEER_CA_CERT:
 204             vconn_ssl_set_peer_ca_cert_file(optarg);
 205             break;
 206 #endif
 207
 208         case '?':
 209             exit(EXIT_FAILURE);
 210
 211         default:
 212             abort();
 213         }
 214     }
 215     free(short_options);
 216
 217     argc -= optind;
 218     argv += optind;
 219
 220     if (argc != 1) {
 221         ovs_fatal(0, "config file is only non-option argument; "
 222                 "use --help for usage");
 223     }
 224
 225     config_file = argv[0];
 226     error = cfg_set_file(config_file);
 227     if (error) {
 228        ovs_fatal(error, "failed to add configuration file \"%s\"",
 229                 config_file);
 230     }
 231 }
 232
 233 static void
 234 usage(void)
 235 {
 236     printf("%s: Open vSwitch daemon\n"
 237            "usage: %s [OPTIONS] CONFIG\n"
 238            "CONFIG is a configuration file in ovs-vswitchd.conf(5) format.\n",
 239            program_name, program_name);
 240     daemon_usage();
 241     vlog_usage();
 242     printf("\nLegacy compatibility options:\n"
 243            " --fake-proc-net          simulate some files in /proc/net\n"
 244            "\nOther options:\n"
 245            "  -h, --help              display this help message\n"
 246            "  -V, --version           display version information\n");
 247     leak_checker_usage();
 248     exit(EXIT_SUCCESS);
 249 }