vswitchd/ovs-vswitchd.c

   1 /* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
   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 <errno.h>
  19 #include <getopt.h>
  20 #include <limits.h>
  21 #include <signal.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #ifdef HAVE_MLOCKALL
  25 #include <sys/mman.h>
  26 #endif
  27
  28 #include "bridge.h"
  29 #include "command-line.h"
  30 #include "compiler.h"
  31 #include "daemon.h"
  32 #include "dirs.h"
  33 #include "dpif.h"
  34 #include "dummy.h"
  35 #include "fatal-signal.h"
  36 #include "memory.h"
  37 #include "netdev.h"
  38 #include "openflow/openflow.h"
  39 #include "ovsdb-idl.h"
  40 #include "poll-loop.h"
  41 #include "simap.h"
  42 #include "stream-ssl.h"
  43 #include "stream.h"
  44 #include "svec.h"
  45 #include "timeval.h"
  46 #include "unixctl.h"
  47 #include "util.h"
  48 #include "vconn.h"
  49 #include "vlog.h"
  50 #include "lib/vswitch-idl.h"
  51
  52 VLOG_DEFINE_THIS_MODULE(vswitchd);
  53
  54 /* --mlockall: If set, locks all process memory into physical RAM, preventing
  55  * the kernel from paging any of its memory to disk. */
  56 static bool want_mlockall;
  57
  58 static unixctl_cb_func ovs_vswitchd_exit;
  59
  60 static char *parse_options(int argc, char *argv[], char **unixctl_path);
  61 static void usage(void) NO_RETURN;
  62
  63 int
  64 main(int argc, char *argv[])
  65 {
  66     char *unixctl_path = NULL;
  67     struct unixctl_server *unixctl;
  68     char *remote;
  69     bool exiting;
  70     int retval;
  71
  72     proctitle_init(argc, argv);
  73     set_program_name(argv[0]);
  74     service_start(&argc, &argv);
  75     remote = parse_options(argc, argv, &unixctl_path);
  76     fatal_ignore_sigpipe();
  77     ovsrec_init();
  78
  79     daemonize_start();
  80
  81     if (want_mlockall) {
  82 #ifdef HAVE_MLOCKALL
  83         if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
  84             VLOG_ERR("mlockall failed: %s", ovs_strerror(errno));
  85         }
  86 #else
  87         VLOG_ERR("mlockall not supported on this system");
  88 #endif
  89     }
  90
  91     retval = unixctl_server_create(unixctl_path, &unixctl);
  92     if (retval) {
  93         exit(EXIT_FAILURE);
  94     }
  95     unixctl_command_register("exit", "", 0, 0, ovs_vswitchd_exit, &exiting);
  96
  97     bridge_init(remote);
  98     free(remote);
  99
 100     exiting = false;
 101     while (!exiting) {
 102         memory_run();
 103         if (memory_should_report()) {
 104             struct simap usage;
 105
 106             simap_init(&usage);
 107             bridge_get_memory_usage(&usage);
 108             memory_report(&usage);
 109             simap_destroy(&usage);
 110         }
 111         bridge_run();
 112         unixctl_server_run(unixctl);
 113         netdev_run();
 114
 115         memory_wait();
 116         bridge_wait();
 117         unixctl_server_wait(unixctl);
 118         netdev_wait();
 119         if (exiting) {
 120             poll_immediate_wake();
 121         }
 122         poll_block();
 123         if (should_service_stop()) {
 124             exiting = true;
 125         }
 126     }
 127     bridge_exit();
 128     unixctl_server_destroy(unixctl);
 129     service_stop();
 130
 131     return 0;
 132 }
 133
 134 static char *
 135 parse_options(int argc, char *argv[], char **unixctl_pathp)
 136 {
 137     enum {
 138         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 139         OPT_MLOCKALL,
 140         OPT_UNIXCTL,
 141         VLOG_OPTION_ENUMS,
 142         OPT_BOOTSTRAP_CA_CERT,
 143         OPT_ENABLE_DUMMY,
 144         OPT_DISABLE_SYSTEM,
 145         OPT_ENABLE_OF14,
 146         DAEMON_OPTION_ENUMS
 147     };
 148     static const struct option long_options[] = {
 149         {"help",        no_argument, NULL, 'h'},
 150         {"version",     no_argument, NULL, 'V'},
 151         {"mlockall",    no_argument, NULL, OPT_MLOCKALL},
 152         {"unixctl",     required_argument, NULL, OPT_UNIXCTL},
 153         DAEMON_LONG_OPTIONS,
 154         VLOG_LONG_OPTIONS,
 155         STREAM_SSL_LONG_OPTIONS,
 156         {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
 157         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
 158         {"enable-dummy", optional_argument, NULL, OPT_ENABLE_DUMMY},
 159         {"disable-system", no_argument, NULL, OPT_DISABLE_SYSTEM},
 160         {"enable-of14", no_argument, NULL, OPT_ENABLE_OF14},
 161         {NULL, 0, NULL, 0},
 162     };
 163     char *short_options = long_options_to_short_options(long_options);
 164
 165     for (;;) {
 166         int c;
 167
 168         c = getopt_long(argc, argv, short_options, long_options, NULL);
 169         if (c == -1) {
 170             break;
 171         }
 172
 173         switch (c) {
 174         case 'h':
 175             usage();
 176
 177         case 'V':
 178             ovs_print_version(OFP10_VERSION, OFP10_VERSION);
 179             exit(EXIT_SUCCESS);
 180
 181         case OPT_MLOCKALL:
 182             want_mlockall = true;
 183             break;
 184
 185         case OPT_UNIXCTL:
 186             *unixctl_pathp = optarg;
 187             break;
 188
 189         VLOG_OPTION_HANDLERS
 190         DAEMON_OPTION_HANDLERS
 191         STREAM_SSL_OPTION_HANDLERS
 192
 193         case OPT_PEER_CA_CERT:
 194             stream_ssl_set_peer_ca_cert_file(optarg);
 195             break;
 196
 197         case OPT_BOOTSTRAP_CA_CERT:
 198             stream_ssl_set_ca_cert_file(optarg, true);
 199             break;
 200
 201         case OPT_ENABLE_DUMMY:
 202             dummy_enable(optarg && !strcmp(optarg, "override"));
 203             break;
 204
 205         case OPT_DISABLE_SYSTEM:
 206             dp_blacklist_provider("system");
 207             break;
 208
 209         case OPT_ENABLE_OF14:
 210             bridge_enable_of14();
 211             break;
 212
 213         case '?':
 214             exit(EXIT_FAILURE);
 215
 216         default:
 217             abort();
 218         }
 219     }
 220     free(short_options);
 221
 222     argc -= optind;
 223     argv += optind;
 224
 225     switch (argc) {
 226     case 0:
 227         return xasprintf("unix:%s/db.sock", ovs_rundir());
 228
 229     case 1:
 230         return xstrdup(argv[0]);
 231
 232     default:
 233         VLOG_FATAL("at most one non-option argument accepted; "
 234                    "use --help for usage");
 235     }
 236 }
 237
 238 static void
 239 usage(void)
 240 {
 241     printf("%s: Open vSwitch daemon\n"
 242            "usage: %s [OPTIONS] [DATABASE]\n"
 243            "where DATABASE is a socket on which ovsdb-server is listening\n"
 244            "      (default: \"unix:%s/db.sock\").\n",
 245            program_name, program_name, ovs_rundir());
 246     stream_usage("DATABASE", true, false, true);
 247     daemon_usage();
 248     vlog_usage();
 249     printf("\nOther options:\n"
 250            "  --unixctl=SOCKET        override default control socket name\n"
 251            "  --enable-of14           allow enabling OF1.4 (unsafely!)\n"
 252            "  -h, --help              display this help message\n"
 253            "  -V, --version           display version information\n");
 254     exit(EXIT_SUCCESS);
 255 }
 256
 257 static void
 258 ovs_vswitchd_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
 259                   const char *argv[] OVS_UNUSED, void *exiting_)
 260 {
 261     bool *exiting = exiting_;
 262     *exiting = true;
 263     unixctl_command_reply(conn, NULL);
 264 }