vswitchd/ovs-vswitchd.c

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