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 "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     argc -= retval;
  76     argv += retval;
  77
  78     ovs_cmdl_proctitle_init(argc, argv);
  79     service_start(&argc, &argv);
  80     remote = parse_options(argc, argv, &unixctl_path);
  81     fatal_ignore_sigpipe();
  82     ovsrec_init();
  83
  84     daemonize_start();
  85
  86     if (want_mlockall) {
  87 #ifdef HAVE_MLOCKALL
  88         if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
  89             VLOG_ERR("mlockall failed: %s", ovs_strerror(errno));
  90         }
  91 #else
  92         VLOG_ERR("mlockall not supported on this system");
  93 #endif
  94     }
  95
  96     retval = unixctl_server_create(unixctl_path, &unixctl);
  97     if (retval) {
  98         exit(EXIT_FAILURE);
  99     }
 100     unixctl_command_register("exit", "", 0, 0, ovs_vswitchd_exit, &exiting);
 101
 102     bridge_init(remote);
 103     free(remote);
 104
 105     exiting = false;
 106     while (!exiting) {
 107         memory_run();
 108         if (memory_should_report()) {
 109             struct simap usage;
 110
 111             simap_init(&usage);
 112             bridge_get_memory_usage(&usage);
 113             memory_report(&usage);
 114             simap_destroy(&usage);
 115         }
 116         bridge_run();
 117         unixctl_server_run(unixctl);
 118         netdev_run();
 119
 120         memory_wait();
 121         bridge_wait();
 122         unixctl_server_wait(unixctl);
 123         netdev_wait();
 124         if (exiting) {
 125             poll_immediate_wake();
 126         }
 127         poll_block();
 128         if (should_service_stop()) {
 129             exiting = true;
 130         }
 131     }
 132     bridge_exit();
 133     unixctl_server_destroy(unixctl);
 134     service_stop();
 135
 136     return 0;
 137 }
 138
 139 static char *
 140 parse_options(int argc, char *argv[], char **unixctl_pathp)
 141 {
 142     enum {
 143         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
 144         OPT_MLOCKALL,
 145         OPT_UNIXCTL,
 146         VLOG_OPTION_ENUMS,
 147         OPT_BOOTSTRAP_CA_CERT,
 148         OPT_ENABLE_DUMMY,
 149         OPT_DISABLE_SYSTEM,
 150         DAEMON_OPTION_ENUMS,
 151         OPT_DPDK,
 152     };
 153     static const struct option long_options[] = {
 154         {"help",        no_argument, NULL, 'h'},
 155         {"version",     no_argument, NULL, 'V'},
 156         {"mlockall",    no_argument, NULL, OPT_MLOCKALL},
 157         {"unixctl",     required_argument, NULL, OPT_UNIXCTL},
 158         DAEMON_LONG_OPTIONS,
 159         VLOG_LONG_OPTIONS,
 160         STREAM_SSL_LONG_OPTIONS,
 161         {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
 162         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
 163         {"enable-dummy", optional_argument, NULL, OPT_ENABLE_DUMMY},
 164         {"disable-system", no_argument, NULL, OPT_DISABLE_SYSTEM},
 165         {"dpdk", required_argument, NULL, OPT_DPDK},
 166         {NULL, 0, NULL, 0},
 167     };
 168     char *short_options = ovs_cmdl_long_options_to_short_options(long_options);
 169
 170     for (;;) {
 171         int c;
 172
 173         c = getopt_long(argc, argv, short_options, long_options, NULL);
 174         if (c == -1) {
 175             break;
 176         }
 177
 178         switch (c) {
 179         case 'h':
 180             usage();
 181
 182         case 'V':
 183             ovs_print_version(OFP10_VERSION, OFP10_VERSION);
 184             exit(EXIT_SUCCESS);
 185
 186         case OPT_MLOCKALL:
 187             want_mlockall = true;
 188             break;
 189
 190         case OPT_UNIXCTL:
 191             *unixctl_pathp = optarg;
 192             break;
 193
 194         VLOG_OPTION_HANDLERS
 195         DAEMON_OPTION_HANDLERS
 196         STREAM_SSL_OPTION_HANDLERS
 197
 198         case OPT_PEER_CA_CERT:
 199             stream_ssl_set_peer_ca_cert_file(optarg);
 200             break;
 201
 202         case OPT_BOOTSTRAP_CA_CERT:
 203             stream_ssl_set_ca_cert_file(optarg, true);
 204             break;
 205
 206         case OPT_ENABLE_DUMMY:
 207             dummy_enable(optarg && !strcmp(optarg, "override"));
 208             break;
 209
 210         case OPT_DISABLE_SYSTEM:
 211             dp_blacklist_provider("system");
 212             break;
 213
 214         case '?':
 215             exit(EXIT_FAILURE);
 216
 217         case OPT_DPDK:
 218             ovs_fatal(0, "--dpdk must be given at beginning of command line.");
 219             break;
 220
 221         default:
 222             abort();
 223         }
 224     }
 225     free(short_options);
 226
 227     argc -= optind;
 228     argv += optind;
 229
 230     switch (argc) {
 231     case 0:
 232         return xasprintf("unix:%s/db.sock", ovs_rundir());
 233
 234     case 1:
 235         return xstrdup(argv[0]);
 236
 237     default:
 238         VLOG_FATAL("at most one non-option argument accepted; "
 239                    "use --help for usage");
 240     }
 241 }
 242
 243 static void
 244 usage(void)
 245 {
 246     printf("%s: Open vSwitch daemon\n"
 247            "usage: %s [OPTIONS] [DATABASE]\n"
 248            "where DATABASE is a socket on which ovsdb-server is listening\n"
 249            "      (default: \"unix:%s/db.sock\").\n",
 250            program_name, program_name, ovs_rundir());
 251     stream_usage("DATABASE", true, false, true);
 252     daemon_usage();
 253     vlog_usage();
 254     printf("\nDPDK options:\n"
 255            "  --dpdk options            Initialize DPDK datapath.\n"
 256            "  --cuse_dev_name BASENAME  override default character device name\n"
 257            "                            for use with userspace vHost.\n");
 258     printf("\nOther options:\n"
 259            "  --unixctl=SOCKET          override default control socket name\n"
 260            "  -h, --help                display this help message\n"
 261            "  -V, --version             display version information\n");
 262     exit(EXIT_SUCCESS);
 263 }
 264
 265 static void
 266 ovs_vswitchd_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
 267                   const char *argv[] OVS_UNUSED, void *exiting_)
 268 {
 269     bool *exiting = exiting_;
 270     *exiting = true;
 271     unixctl_command_reply(conn, NULL);
 272 }