vswitchd/ovs-vswitchd.c

   1 /* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 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 "ovs-rcu.h"
  41 #include "ovs-router.h"
  42 #include "ovs-thread.h"
  43 #include "openvswitch/poll-loop.h"
  44 #include "simap.h"
  45 #include "stream-ssl.h"
  46 #include "stream.h"
  47 #include "svec.h"
  48 #include "timeval.h"
  49 #include "unixctl.h"
  50 #include "util.h"
  51 #include "openvswitch/vconn.h"
  52 #include "openvswitch/vlog.h"
  53 #include "lib/vswitch-idl.h"
  54 #include "lib/dns-resolve.h"
  55
  56 VLOG_DEFINE_THIS_MODULE(vswitchd);
  57
  58 /* --mlockall: If set, locks all process memory into physical RAM, preventing
  59  * the kernel from paging any of its memory to disk. */
  60 static bool want_mlockall;
  61
  62 static unixctl_cb_func ovs_vswitchd_exit;
  63
  64 static char *parse_options(int argc, char *argv[], char **unixctl_path);
  65 OVS_NO_RETURN static void usage(void);
  66
  67 struct ovs_vswitchd_exit_args {
  68     bool *exiting;
  69     bool *cleanup;
  70 };
  71
  72 int
  73 main(int argc, char *argv[])
  74 {
  75     char *unixctl_path = NULL;
  76     struct unixctl_server *unixctl;
  77     char *remote;
  78     bool exiting, cleanup;
  79     struct ovs_vswitchd_exit_args exit_args = {&exiting, &cleanup};
  80     int retval;
  81
  82     set_program_name(argv[0]);
  83     ovsthread_id_init();
  84
  85     dns_resolve_init(true);
  86     ovs_cmdl_proctitle_init(argc, argv);
  87     service_start(&argc, &argv);
  88     remote = parse_options(argc, argv, &unixctl_path);
  89     fatal_ignore_sigpipe();
  90
  91     daemonize_start(true);
  92
  93     if (want_mlockall) {
  94 #ifdef HAVE_MLOCKALL
  95         if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
  96             VLOG_ERR("mlockall failed: %s", ovs_strerror(errno));
  97         } else {
  98             set_memory_locked();
  99         }
 100 #else
 101         VLOG_ERR("mlockall not supported on this system");
 102 #endif
 103     }
 104
 105     retval = unixctl_server_create(unixctl_path, &unixctl);
 106     if (retval) {
 107         exit(EXIT_FAILURE);
 108     }
 109     unixctl_command_register("exit", "[--cleanup]", 0, 1,
 110                              ovs_vswitchd_exit, &exit_args);
 111
 112     bridge_init(remote);
 113     free(remote);
 114
 115     exiting = false;
 116     cleanup = false;
 117     while (!exiting) {
 118         memory_run();
 119         if (memory_should_report()) {
 120             struct simap usage;
 121
 122             simap_init(&usage);
 123             bridge_get_memory_usage(&usage);
 124             memory_report(&usage);
 125             simap_destroy(&usage);
 126         }
 127         bridge_run();
 128         unixctl_server_run(unixctl);
 129         netdev_run();
 130
 131         memory_wait();
 132         bridge_wait();
 133         unixctl_server_wait(unixctl);
 134         netdev_wait();
 135         if (exiting) {
 136             poll_immediate_wake();
 137         }
 138         poll_block();
 139         if (should_service_stop()) {
 140             exiting = true;
 141         }
 142     }
 143     bridge_exit(cleanup);
 144     unixctl_server_destroy(unixctl);
 145     service_stop();
 146     vlog_disable_async();
 147     ovsrcu_exit();
 148     dns_resolve_destroy();
 149
 150     return 0;
 151 }
 152
 153 static char *
 154 parse_options(int argc, char *argv[], char **unixctl_pathp)
 155 {
 156     enum {
 157         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 158         OPT_MLOCKALL,
 159         OPT_UNIXCTL,
 160         VLOG_OPTION_ENUMS,
 161         OPT_BOOTSTRAP_CA_CERT,
 162         OPT_ENABLE_DUMMY,
 163         OPT_DISABLE_SYSTEM,
 164         DAEMON_OPTION_ENUMS,
 165         OPT_DPDK,
 166         SSL_OPTION_ENUMS,
 167         OPT_DUMMY_NUMA,
 168     };
 169     static const struct option long_options[] = {
 170         {"help",        no_argument, NULL, 'h'},
 171         {"version",     no_argument, NULL, 'V'},
 172         {"mlockall",    no_argument, NULL, OPT_MLOCKALL},
 173         {"unixctl",     required_argument, NULL, OPT_UNIXCTL},
 174         DAEMON_LONG_OPTIONS,
 175         VLOG_LONG_OPTIONS,
 176         STREAM_SSL_LONG_OPTIONS,
 177         {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
 178         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
 179         {"enable-dummy", optional_argument, NULL, OPT_ENABLE_DUMMY},
 180         {"disable-system", no_argument, NULL, OPT_DISABLE_SYSTEM},
 181         {"dpdk", optional_argument, NULL, OPT_DPDK},
 182         {"dummy-numa", required_argument, NULL, OPT_DUMMY_NUMA},
 183         {NULL, 0, NULL, 0},
 184     };
 185     char *short_options = ovs_cmdl_long_options_to_short_options(long_options);
 186
 187     for (;;) {
 188         int c;
 189
 190         c = getopt_long(argc, argv, short_options, long_options, NULL);
 191         if (c == -1) {
 192             break;
 193         }
 194
 195         switch (c) {
 196         case 'h':
 197             usage();
 198
 199         case 'V':
 200             ovs_print_version(0, 0);
 201             print_dpdk_version();
 202             exit(EXIT_SUCCESS);
 203
 204         case OPT_MLOCKALL:
 205             want_mlockall = true;
 206             break;
 207
 208         case OPT_UNIXCTL:
 209             *unixctl_pathp = optarg;
 210             break;
 211
 212         VLOG_OPTION_HANDLERS
 213         DAEMON_OPTION_HANDLERS
 214         STREAM_SSL_OPTION_HANDLERS
 215
 216         case OPT_PEER_CA_CERT:
 217             stream_ssl_set_peer_ca_cert_file(optarg);
 218             break;
 219
 220         case OPT_BOOTSTRAP_CA_CERT:
 221             stream_ssl_set_ca_cert_file(optarg, true);
 222             break;
 223
 224         case OPT_ENABLE_DUMMY:
 225             dummy_enable(optarg);
 226             break;
 227
 228         case OPT_DISABLE_SYSTEM:
 229             dp_blacklist_provider("system");
 230             ovs_router_disable_system_routing_table();
 231             break;
 232
 233         case '?':
 234             exit(EXIT_FAILURE);
 235
 236         case OPT_DPDK:
 237             ovs_fatal(0, "Using --dpdk to configure DPDK is not supported.");
 238             break;
 239
 240         case OPT_DUMMY_NUMA:
 241             ovs_numa_set_dummy(optarg);
 242             break;
 243
 244         default:
 245             abort();
 246         }
 247     }
 248     free(short_options);
 249
 250     argc -= optind;
 251     argv += optind;
 252
 253     switch (argc) {
 254     case 0:
 255         return xasprintf("unix:%s/db.sock", ovs_rundir());
 256
 257     case 1:
 258         return xstrdup(argv[0]);
 259
 260     default:
 261         VLOG_FATAL("at most one non-option argument accepted; "
 262                    "use --help for usage");
 263     }
 264 }
 265
 266 static void
 267 usage(void)
 268 {
 269     printf("%s: Open vSwitch daemon\n"
 270            "usage: %s [OPTIONS] [DATABASE]\n"
 271            "where DATABASE is a socket on which ovsdb-server is listening\n"
 272            "      (default: \"unix:%s/db.sock\").\n",
 273            program_name, program_name, ovs_rundir());
 274     stream_usage("DATABASE", true, false, true);
 275     daemon_usage();
 276     vlog_usage();
 277     printf("\nDPDK options:\n"
 278            "Configuration of DPDK via command-line is removed from this\n"
 279            "version of Open vSwitch. DPDK is configured through ovsdb.\n"
 280           );
 281     printf("\nOther options:\n"
 282            "  --unixctl=SOCKET          override default control socket name\n"
 283            "  -h, --help                display this help message\n"
 284            "  -V, --version             display version information\n");
 285     exit(EXIT_SUCCESS);
 286 }
 287
 288 static void
 289 ovs_vswitchd_exit(struct unixctl_conn *conn, int argc,
 290                   const char *argv[], void *exit_args_)
 291 {
 292     struct ovs_vswitchd_exit_args *exit_args = exit_args_;
 293     *exit_args->exiting = true;
 294     *exit_args->cleanup = argc == 2 && !strcmp(argv[1], "--cleanup");
 295     unixctl_command_reply(conn, NULL);
 296 }