1 /* Copyright (c) 2015 Nicira, Inc.
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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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.
18 #include "ovn-controller.h"
26 #include "command-line.h"
30 #include "openvswitch/vconn.h"
31 #include "openvswitch/vlog.h"
32 #include "ovn/lib/ovn-sb-idl.h"
33 #include "poll-loop.h"
34 #include "fatal-signal.h"
35 #include "lib/vswitch-idl.h"
38 #include "stream-ssl.h"
48 VLOG_DEFINE_THIS_MODULE(main);
50 static unixctl_cb_func ovn_controller_exit;
52 #define DEFAULT_BRIDGE_NAME "br-int"
54 static void parse_options(int argc, char *argv[]);
55 OVS_NO_RETURN static void usage(void);
57 static char *ovs_remote;
58 static char *ovnsb_remote;
62 get_initial_snapshot(struct ovsdb_idl *idl)
66 if (ovsdb_idl_has_ever_connected(idl)) {
74 static const struct ovsrec_bridge *
75 get_bridge(struct controller_ctx *ctx, const char *name)
77 const struct ovsrec_bridge *br;
79 OVSREC_BRIDGE_FOR_EACH(br, ctx->ovs_idl) {
80 if (!strcmp(br->name, name)) {
88 /* Retrieve the OVN integration bridge from the "external-ids:ovn-bridge"
89 * key, the remote location from the "external-ids:ovn-remote" key, and
90 * the chassis name from the "external-ids:system-id" key in the
91 * Open_vSwitch table of the OVS database instance.
93 * xxx ovn-controller does not support changing any of these mid-run,
94 * xxx but that should be addressed later. */
96 get_core_config(struct controller_ctx *ctx, char **br_int_namep)
99 ovsdb_idl_run(ctx->ovs_idl);
101 const struct ovsrec_open_vswitch *cfg;
102 cfg = ovsrec_open_vswitch_first(ctx->ovs_idl);
104 VLOG_ERR("No Open_vSwitch row defined.");
105 ovsdb_idl_destroy(ctx->ovs_idl);
109 const struct ovsrec_bridge *br_int;
110 const char *remote, *system_id, *br_int_name;
112 br_int_name = smap_get(&cfg->external_ids, "ovn-bridge");
114 br_int_name = DEFAULT_BRIDGE_NAME;
117 br_int = get_bridge(ctx, br_int_name);
119 VLOG_INFO("Integration bridge '%s' does not exist. Waiting...",
124 remote = smap_get(&cfg->external_ids, "ovn-remote");
126 VLOG_INFO("OVN OVSDB remote not specified. Waiting...");
130 system_id = smap_get(&cfg->external_ids, "system-id");
132 VLOG_INFO("system-id not specified. Waiting...");
136 ovnsb_remote = xstrdup(remote);
137 ctx->chassis_id = xstrdup(system_id);
138 *br_int_namep = xstrdup(br_int_name);
142 ovsdb_idl_wait(ctx->ovs_idl);
149 struct ovsdb_idl *idl;
150 unsigned int skip_seqno;
152 struct ovsdb_idl_txn *committing_txn;
153 unsigned int precommit_seqno;
155 struct ovsdb_idl_txn *open_txn;
158 #define IDL_LOOP_INITIALIZER(IDL) { .idl = (IDL) }
161 idl_loop_destroy(struct idl_loop *loop)
164 ovsdb_idl_destroy(loop->idl);
168 static struct ovsdb_idl_txn *
169 idl_loop_run(struct idl_loop *loop)
171 ovsdb_idl_run(loop->idl);
172 loop->open_txn = (loop->committing_txn
173 || ovsdb_idl_get_seqno(loop->idl) == loop->skip_seqno
175 : ovsdb_idl_txn_create(loop->idl));
176 return loop->open_txn;
180 idl_loop_commit_and_wait(struct idl_loop *loop)
182 if (loop->open_txn) {
183 loop->committing_txn = loop->open_txn;
184 loop->open_txn = NULL;
186 loop->precommit_seqno = ovsdb_idl_get_seqno(loop->idl);
189 struct ovsdb_idl_txn *txn = loop->committing_txn;
191 enum ovsdb_idl_txn_status status = ovsdb_idl_txn_commit(txn);
192 if (status != TXN_INCOMPLETE) {
195 /* We want to re-evaluate the database when it's changed from
196 * the contents that it had when we started the commit. (That
197 * might have already happened.) */
198 loop->skip_seqno = loop->precommit_seqno;
199 if (ovsdb_idl_get_seqno(loop->idl) != loop->skip_seqno) {
200 poll_immediate_wake();
205 /* If the database has already changed since we started the
206 * commit, re-evaluate it immediately to avoid missing a change
208 if (ovsdb_idl_get_seqno(loop->idl) != loop->precommit_seqno) {
209 poll_immediate_wake();
219 case TXN_UNCOMMITTED:
224 ovsdb_idl_txn_destroy(txn);
225 loop->committing_txn = NULL;
229 ovsdb_idl_wait(loop->idl);
233 main(int argc, char *argv[])
235 struct unixctl_server *unixctl;
236 struct controller_ctx ctx = { .chassis_id = NULL };
240 ovs_cmdl_proctitle_init(argc, argv);
241 set_program_name(argv[0]);
242 parse_options(argc, argv);
243 fatal_ignore_sigpipe();
247 retval = unixctl_server_create(NULL, &unixctl);
251 unixctl_command_register("exit", "", 0, 0, ovn_controller_exit, &exiting);
253 daemonize_complete();
260 /* Connect to OVS OVSDB instance. We do not monitor all tables by
261 * default, so modules must register their interest explicitly. */
262 ctx.ovs_idl = ovsdb_idl_create(ovs_remote, &ovsrec_idl_class, false, true);
264 /* Register interest in "external_ids" column in "Open_vSwitch" table,
265 * since we'll need to get the OVN OVSDB remote. */
266 ovsdb_idl_add_table(ctx.ovs_idl, &ovsrec_table_open_vswitch);
267 ovsdb_idl_add_column(ctx.ovs_idl, &ovsrec_open_vswitch_col_external_ids);
274 get_initial_snapshot(ctx.ovs_idl);
277 get_core_config(&ctx, &br_int_name);
279 ctx.ovnsb_idl = ovsdb_idl_create(ovnsb_remote, &sbrec_idl_class,
281 get_initial_snapshot(ctx.ovnsb_idl);
283 struct idl_loop ovnsb_idl_loop = IDL_LOOP_INITIALIZER(ctx.ovnsb_idl);
284 struct idl_loop ovs_idl_loop = IDL_LOOP_INITIALIZER(ctx.ovs_idl);
289 ctx.ovnsb_idl_txn = idl_loop_run(&ovnsb_idl_loop);
290 ctx.ovs_idl_txn = idl_loop_run(&ovs_idl_loop);
292 /* xxx If run into any surprising changes, we exit. We should
293 * xxx handle this more gracefully. */
294 const struct ovsrec_bridge *br_int = get_bridge(&ctx, br_int_name);
296 VLOG_ERR("Integration bridge '%s' disappeared", br_int_name);
297 retval = EXIT_FAILURE;
301 chassis_run(&ctx, br_int);
302 binding_run(&ctx, br_int);
304 struct hmap flow_table = HMAP_INITIALIZER(&flow_table);
305 pipeline_run(&ctx, &flow_table);
306 physical_run(&ctx, br_int, &flow_table);
307 ofctrl_run(br_int, &flow_table);
308 hmap_destroy(&flow_table);
310 unixctl_server_run(unixctl);
312 unixctl_server_wait(unixctl);
314 poll_immediate_wake();
317 idl_loop_commit_and_wait(&ovnsb_idl_loop);
318 idl_loop_commit_and_wait(&ovs_idl_loop);
324 /* It's time to exit. Clean up the databases. */
327 ctx.ovnsb_idl_txn = idl_loop_run(&ovnsb_idl_loop);
328 ctx.ovs_idl_txn = idl_loop_run(&ovs_idl_loop);
330 /* xxx If run into any surprising changes, we exit. We should
331 * xxx handle this more gracefully. */
332 const struct ovsrec_bridge *br_int = get_bridge(&ctx, br_int_name);
334 VLOG_ERR("Integration bridge '%s' disappeared", br_int_name);
335 retval = EXIT_FAILURE;
339 /* Run both the binding and chassis cleanup, even if one of them
340 * returns false. We're done if both return true. */
341 done = binding_cleanup(&ctx);
342 done = chassis_cleanup(&ctx, br_int) && done;
344 poll_immediate_wake();
347 idl_loop_commit_and_wait(&ovnsb_idl_loop);
348 idl_loop_commit_and_wait(&ovs_idl_loop);
353 unixctl_server_destroy(unixctl);
354 pipeline_destroy(&ctx);
357 idl_loop_destroy(&ovs_idl_loop);
358 idl_loop_destroy(&ovnsb_idl_loop);
361 free(ctx.chassis_id);
369 parse_options(int argc, char *argv[])
372 OPT_PEER_CA_CERT = UCHAR_MAX + 1,
377 static struct option long_options[] = {
378 {"help", no_argument, NULL, 'h'},
379 {"version", no_argument, NULL, 'V'},
382 STREAM_SSL_LONG_OPTIONS,
383 {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
386 char *short_options = ovs_cmdl_long_options_to_short_options(long_options);
391 c = getopt_long(argc, argv, short_options, long_options, NULL);
401 ovs_print_version(OFP13_VERSION, OFP13_VERSION);
405 DAEMON_OPTION_HANDLERS
406 STREAM_SSL_OPTION_HANDLERS
408 case OPT_PEER_CA_CERT:
409 stream_ssl_set_peer_ca_cert_file(optarg);
425 ovs_remote = xasprintf("unix:%s/db.sock", ovs_rundir());
426 } else if (argc == 1) {
427 ovs_remote = xstrdup(argv[0]);
429 VLOG_FATAL("exactly zero or one non-option argument required; "
430 "use --help for usage");
437 printf("%s: OVN controller\n"
438 "usage %s [OPTIONS] [OVS-DATABASE]\n"
439 "where OVS-DATABASE is a socket on which the OVS OVSDB server is listening.\n",
440 program_name, program_name);
441 stream_usage("OVS-DATABASE", true, false, false);
444 printf("\nOther options:\n"
445 " -h, --help display this help message\n"
446 " -V, --version display version information\n");
451 ovn_controller_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
452 const char *argv[] OVS_UNUSED, void *exiting_)
454 bool *exiting = exiting_;
457 unixctl_command_reply(conn, NULL);