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