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 "command-line.h"
  28 #include "compiler.h"
  29 #include "daemon.h"
  30 #include "dpif.h"
  31 #include "fault.h"
  32 #include "leak-checker.h"
  33 #include "netdev.h"
  34 #include "ovsdb-idl.h"
  35 #include "poll-loop.h"
  36 #include "proc-net-compat.h"
  37 #include "process.h"
  38 #include "signals.h"
  39 #include "stream-ssl.h"
  40 #include "stream.h"
  41 #include "svec.h"
  42 #include "timeval.h"
  43 #include "unixctl.h"
  44 #include "util.h"
  45 #include "vconn.h"
  46 #include "vswitchd/vswitch-idl.h"
  47
  48 #include "vlog.h"
  49 #define THIS_MODULE VLM_vswitchd
  50
  51 static const char *parse_options(int argc, char *argv[]);
  52 static void usage(void) NO_RETURN;
  53
  54 int
  55 main(int argc, char *argv[])
  56 {
  57     struct unixctl_server *unixctl;
  58     struct signal *sighup;
  59     struct ovsdb_idl *idl;
  60     const char *remote;
  61     bool need_reconfigure;
  62     bool inited;
  63     unsigned int idl_seqno;
  64     int retval;
  65
  66     set_program_name(argv[0]);
  67     register_fault_handlers();
  68     time_init();
  69     vlog_init();
  70     remote = 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_start();
  77
  78     retval = unixctl_server_create(NULL, &unixctl);
  79     if (retval) {
  80         ovs_fatal(retval, "could not listen for control connections");
  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     };
 143     static struct option long_options[] = {
 144         {"help",        no_argument, 0, 'h'},
 145         {"version",     no_argument, 0, 'V'},
 146         {"fake-proc-net", no_argument, 0, OPT_FAKE_PROC_NET},
 147         DAEMON_LONG_OPTIONS,
 148         VLOG_LONG_OPTIONS,
 149         LEAK_CHECKER_LONG_OPTIONS,
 150 #ifdef HAVE_OPENSSL
 151         STREAM_SSL_LONG_OPTIONS
 152         {"peer-ca-cert", required_argument, 0, OPT_PEER_CA_CERT},
 153 #endif
 154         {0, 0, 0, 0},
 155     };
 156     char *short_options = long_options_to_short_options(long_options);
 157     int error;
 158
 159     for (;;) {
 160         int c;
 161
 162         c = getopt_long(argc, argv, short_options, long_options, NULL);
 163         if (c == -1) {
 164             break;
 165         }
 166
 167         switch (c) {
 168         case 'H':
 169         case 'h':
 170             usage();
 171
 172         case 'V':
 173             OVS_PRINT_VERSION(OFP_VERSION, OFP_VERSION);
 174             exit(EXIT_SUCCESS);
 175
 176         case OPT_FAKE_PROC_NET:
 177             error = proc_net_compat_init();
 178             if (error) {
 179                 ovs_fatal(error, "failed to initialize /proc/net "
 180                           "compatibility");
 181             }
 182             break;
 183
 184         VLOG_OPTION_HANDLERS
 185         DAEMON_OPTION_HANDLERS
 186         LEAK_CHECKER_OPTION_HANDLERS
 187
 188 #ifdef HAVE_OPENSSL
 189         STREAM_SSL_OPTION_HANDLERS
 190
 191         case OPT_PEER_CA_CERT:
 192             stream_ssl_set_peer_ca_cert_file(optarg);
 193             break;
 194 #endif
 195
 196         case '?':
 197             exit(EXIT_FAILURE);
 198
 199         default:
 200             abort();
 201         }
 202     }
 203     free(short_options);
 204
 205     argc -= optind;
 206     argv += optind;
 207
 208     if (argc != 1) {
 209         ovs_fatal(0, "database socket is only non-option argument; "
 210                 "use --help for usage");
 211     }
 212
 213     return argv[0];
 214 }
 215
 216 static void
 217 usage(void)
 218 {
 219     printf("%s: Open vSwitch daemon\n"
 220            "usage: %s [OPTIONS] DATABASE\n"
 221            "where DATABASE is a socket on which ovsdb-server is listening.\n",
 222            program_name, program_name);
 223     stream_usage("DATABASE", true, false, true);
 224     daemon_usage();
 225     vlog_usage();
 226     printf("\nLegacy compatibility options:\n"
 227            " --fake-proc-net          simulate some files in /proc/net\n"
 228            "\nOther options:\n"
 229            "  -h, --help              display this help message\n"
 230            "  -V, --version           display version information\n");
 231     leak_checker_usage();
 232     exit(EXIT_SUCCESS);
 233 }