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         }
  98 #else
  99         VLOG_ERR("mlockall not supported on this system");
 100 #endif
 101     }
 102
 103     retval = unixctl_server_create(unixctl_path, &unixctl);
 104     if (retval) {
 105         exit(EXIT_FAILURE);
 106     }
 107     unixctl_command_register("exit", "[--cleanup]", 0, 1,
 108                              ovs_vswitchd_exit, &exit_args);
 109
 110     bridge_init(remote);
 111     free(remote);
 112
 113     exiting = false;
 114     cleanup = false;
 115     while (!exiting) {
 116         memory_run();
 117         if (memory_should_report()) {
 118             struct simap usage;
 119
 120             simap_init(&usage);
 121             bridge_get_memory_usage(&usage);
 122             memory_report(&usage);
 123             simap_destroy(&usage);
 124         }
 125         bridge_run();
 126         unixctl_server_run(unixctl);
 127         netdev_run();
 128
 129         memory_wait();
 130         bridge_wait();
 131         unixctl_server_wait(unixctl);
 132         netdev_wait();
 133         if (exiting) {
 134             poll_immediate_wake();
 135         }
 136         poll_block();
 137         if (should_service_stop()) {
 138             exiting = true;
 139         }
 140     }
 141     bridge_exit(cleanup);
 142     unixctl_server_destroy(unixctl);
 143     service_stop();
 144     vlog_disable_async();
 145     ovsrcu_exit();
 146     dns_resolve_destroy();
 147
 148     return 0;
 149 }
 150
 151 static char *
 152 parse_options(int argc, char *argv[], char **unixctl_pathp)
 153 {
 154     enum {
 155         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 156         OPT_MLOCKALL,
 157         OPT_UNIXCTL,
 158         VLOG_OPTION_ENUMS,
 159         OPT_BOOTSTRAP_CA_CERT,
 160         OPT_ENABLE_DUMMY,
 161         OPT_DISABLE_SYSTEM,
 162         DAEMON_OPTION_ENUMS,
 163         OPT_DPDK,
 164         SSL_OPTION_ENUMS,
 165         OPT_DUMMY_NUMA,
 166     };
 167     static const struct option long_options[] = {
 168         {"help",        no_argument, NULL, 'h'},
 169         {"version",     no_argument, NULL, 'V'},
 170         {"mlockall",    no_argument, NULL, OPT_MLOCKALL},
 171         {"unixctl",     required_argument, NULL, OPT_UNIXCTL},
 172         DAEMON_LONG_OPTIONS,
 173         VLOG_LONG_OPTIONS,
 174         STREAM_SSL_LONG_OPTIONS,
 175         {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
 176         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
 177         {"enable-dummy", optional_argument, NULL, OPT_ENABLE_DUMMY},
 178         {"disable-system", no_argument, NULL, OPT_DISABLE_SYSTEM},
 179         {"dpdk", optional_argument, NULL, OPT_DPDK},
 180         {"dummy-numa", required_argument, NULL, OPT_DUMMY_NUMA},
 181         {NULL, 0, NULL, 0},
 182     };
 183     char *short_options = ovs_cmdl_long_options_to_short_options(long_options);
 184
 185     for (;;) {
 186         int c;
 187
 188         c = getopt_long(argc, argv, short_options, long_options, NULL);
 189         if (c == -1) {
 190             break;
 191         }
 192
 193         switch (c) {
 194         case 'h':
 195             usage();
 196
 197         case 'V':
 198             ovs_print_version(0, 0);
 199             print_dpdk_version();
 200             exit(EXIT_SUCCESS);
 201
 202         case OPT_MLOCKALL:
 203             want_mlockall = true;
 204             break;
 205
 206         case OPT_UNIXCTL:
 207             *unixctl_pathp = optarg;
 208             break;
 209
 210         VLOG_OPTION_HANDLERS
 211         DAEMON_OPTION_HANDLERS
 212         STREAM_SSL_OPTION_HANDLERS
 213
 214         case OPT_PEER_CA_CERT:
 215             stream_ssl_set_peer_ca_cert_file(optarg);
 216             break;
 217
 218         case OPT_BOOTSTRAP_CA_CERT:
 219             stream_ssl_set_ca_cert_file(optarg, true);
 220             break;
 221
 222         case OPT_ENABLE_DUMMY:
 223             dummy_enable(optarg);
 224             break;
 225
 226         case OPT_DISABLE_SYSTEM:
 227             dp_blacklist_provider("system");
 228             ovs_router_disable_system_routing_table();
 229             break;
 230
 231         case '?':
 232             exit(EXIT_FAILURE);
 233
 234         case OPT_DPDK:
 235             ovs_fatal(0, "Using --dpdk to configure DPDK is not supported.");
 236             break;
 237
 238         case OPT_DUMMY_NUMA:
 239             ovs_numa_set_dummy(optarg);
 240             break;
 241
 242         default:
 243             abort();
 244         }
 245     }
 246     free(short_options);
 247
 248     argc -= optind;
 249     argv += optind;
 250
 251     switch (argc) {
 252     case 0:
 253         return xasprintf("unix:%s/db.sock", ovs_rundir());
 254
 255     case 1:
 256         return xstrdup(argv[0]);
 257
 258     default:
 259         VLOG_FATAL("at most one non-option argument accepted; "
 260                    "use --help for usage");
 261     }
 262 }
 263
 264 static void
 265 usage(void)
 266 {
 267     printf("%s: Open vSwitch daemon\n"
 268            "usage: %s [OPTIONS] [DATABASE]\n"
 269            "where DATABASE is a socket on which ovsdb-server is listening\n"
 270            "      (default: \"unix:%s/db.sock\").\n",
 271            program_name, program_name, ovs_rundir());
 272     stream_usage("DATABASE", true, false, true);
 273     daemon_usage();
 274     vlog_usage();
 275     printf("\nDPDK options:\n"
 276            "Configuration of DPDK via command-line is removed from this\n"
 277            "version of Open vSwitch. DPDK is configured through ovsdb.\n"
 278           );
 279     printf("\nOther options:\n"
 280            "  --unixctl=SOCKET          override default control socket name\n"
 281            "  -h, --help                display this help message\n"
 282            "  -V, --version             display version information\n");
 283     exit(EXIT_SUCCESS);
 284 }
 285
 286 static void
 287 ovs_vswitchd_exit(struct unixctl_conn *conn, int argc,
 288                   const char *argv[], void *exit_args_)
 289 {
 290     struct ovs_vswitchd_exit_args *exit_args = exit_args_;
 291     *exit_args->exiting = true;
 292     *exit_args->cleanup = argc == 2 && !strcmp(argv[1], "--cleanup");
 293     unixctl_command_reply(conn, NULL);
 294 }