Remove useless use of <assert.h>.
[sliver-openvswitch.git] / vswitchd / ovs-vswitchd.c
1 /* Copyright (c) 2008, 2009, 2010, 2011, 2012 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 "leak-checker.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 "process.h"
42 #include "signals.h"
43 #include "simap.h"
44 #include "stream-ssl.h"
45 #include "stream.h"
46 #include "stress.h"
47 #include "svec.h"
48 #include "timeval.h"
49 #include "unixctl.h"
50 #include "util.h"
51 #include "vconn.h"
52 #include "vlog.h"
53 #include "lib/vswitch-idl.h"
54 #include "worker.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 static void usage(void) NO_RETURN;
66
67 int
68 main(int argc, char *argv[])
69 {
70     char *unixctl_path = NULL;
71     struct unixctl_server *unixctl;
72     struct signal *sighup;
73     char *remote;
74     bool exiting;
75     int retval;
76
77     proctitle_init(argc, argv);
78     set_program_name(argv[0]);
79     stress_init_command();
80     remote = parse_options(argc, argv, &unixctl_path);
81     signal(SIGPIPE, SIG_IGN);
82     sighup = signal_register(SIGHUP);
83     process_init();
84     ovsrec_init();
85
86     daemonize_start();
87
88     if (want_mlockall) {
89 #ifdef HAVE_MLOCKALL
90         if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
91             VLOG_ERR("mlockall failed: %s", strerror(errno));
92         }
93 #else
94         VLOG_ERR("mlockall not supported on this system");
95 #endif
96     }
97
98     worker_start();
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         worker_run();
112         if (signal_poll(sighup)) {
113             vlog_reopen_log_file();
114         }
115         memory_run();
116         if (memory_should_report()) {
117             struct simap usage;
118
119             simap_init(&usage);
120             bridge_get_memory_usage(&usage);
121             memory_report(&usage);
122             simap_destroy(&usage);
123         }
124         bridge_run_fast();
125         bridge_run();
126         bridge_run_fast();
127         unixctl_server_run(unixctl);
128         netdev_run();
129
130         worker_wait();
131         signal_wait(sighup);
132         memory_wait();
133         bridge_wait();
134         unixctl_server_wait(unixctl);
135         netdev_wait();
136         if (exiting) {
137             poll_immediate_wake();
138         }
139         poll_block();
140     }
141     bridge_exit();
142     unixctl_server_destroy(unixctl);
143     signal_unregister(sighup);
144
145     return 0;
146 }
147
148 static char *
149 parse_options(int argc, char *argv[], char **unixctl_pathp)
150 {
151     enum {
152         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
153         OPT_MLOCKALL,
154         OPT_UNIXCTL,
155         VLOG_OPTION_ENUMS,
156         LEAK_CHECKER_OPTION_ENUMS,
157         OPT_BOOTSTRAP_CA_CERT,
158         OPT_ENABLE_DUMMY,
159         OPT_DISABLE_SYSTEM,
160         DAEMON_OPTION_ENUMS
161     };
162     static 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         LEAK_CHECKER_LONG_OPTIONS,
170         STREAM_SSL_LONG_OPTIONS,
171         {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
172         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
173         {"enable-dummy", optional_argument, NULL, OPT_ENABLE_DUMMY},
174         {"disable-system", no_argument, NULL, OPT_DISABLE_SYSTEM},
175         {NULL, 0, NULL, 0},
176     };
177     char *short_options = long_options_to_short_options(long_options);
178
179     for (;;) {
180         int c;
181
182         c = getopt_long(argc, argv, short_options, long_options, NULL);
183         if (c == -1) {
184             break;
185         }
186
187         switch (c) {
188         case 'h':
189             usage();
190
191         case 'V':
192             ovs_print_version(OFP10_VERSION, OFP10_VERSION);
193             exit(EXIT_SUCCESS);
194
195         case OPT_MLOCKALL:
196             want_mlockall = true;
197             break;
198
199         case OPT_UNIXCTL:
200             *unixctl_pathp = optarg;
201             break;
202
203         VLOG_OPTION_HANDLERS
204         DAEMON_OPTION_HANDLERS
205         LEAK_CHECKER_OPTION_HANDLERS
206         STREAM_SSL_OPTION_HANDLERS
207
208         case OPT_PEER_CA_CERT:
209             stream_ssl_set_peer_ca_cert_file(optarg);
210             break;
211
212         case OPT_BOOTSTRAP_CA_CERT:
213             stream_ssl_set_ca_cert_file(optarg, true);
214             break;
215
216         case OPT_ENABLE_DUMMY:
217             dummy_enable(optarg && !strcmp(optarg, "override"));
218             break;
219
220         case OPT_DISABLE_SYSTEM:
221             dp_blacklist_provider("system");
222             break;
223
224         case '?':
225             exit(EXIT_FAILURE);
226
227         default:
228             abort();
229         }
230     }
231     free(short_options);
232
233     argc -= optind;
234     argv += optind;
235
236     switch (argc) {
237     case 0:
238         return xasprintf("unix:%s/db.sock", ovs_rundir());
239
240     case 1:
241         return xstrdup(argv[0]);
242
243     default:
244         VLOG_FATAL("at most one non-option argument accepted; "
245                    "use --help for usage");
246     }
247 }
248
249 static void
250 usage(void)
251 {
252     printf("%s: Open vSwitch daemon\n"
253            "usage: %s [OPTIONS] [DATABASE]\n"
254            "where DATABASE is a socket on which ovsdb-server is listening\n"
255            "      (default: \"unix:%s/db.sock\").\n",
256            program_name, program_name, ovs_rundir());
257     stream_usage("DATABASE", true, false, true);
258     daemon_usage();
259     vlog_usage();
260     printf("\nOther options:\n"
261            "  --unixctl=SOCKET        override default control socket name\n"
262            "  -h, --help              display this help message\n"
263            "  -V, --version           display version information\n");
264     leak_checker_usage();
265     exit(EXIT_SUCCESS);
266 }
267
268 static void
269 ovs_vswitchd_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
270                   const char *argv[] OVS_UNUSED, void *exiting_)
271 {
272     bool *exiting = exiting_;
273     *exiting = true;
274     unixctl_command_reply(conn, NULL);
275 }