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"
49 VLOG_DEFINE_THIS_MODULE(main);
51 static unixctl_cb_func ovn_controller_exit;
53 #define DEFAULT_BRIDGE_NAME "br-int"
55 static void parse_options(int argc, char *argv[]);
56 OVS_NO_RETURN static void usage(void);
58 static char *ovs_remote;
59 static char *ovnsb_remote;
63 get_initial_snapshot(struct ovsdb_idl *idl)
67 if (ovsdb_idl_has_ever_connected(idl)) {
75 static const struct ovsrec_bridge *
76 get_bridge(struct controller_ctx *ctx, const char *name)
78 const struct ovsrec_bridge *br;
80 OVSREC_BRIDGE_FOR_EACH(br, ctx->ovs_idl) {
81 if (!strcmp(br->name, name)) {
89 /* Retrieve the OVN integration bridge from the "external-ids:ovn-bridge"
90 * key, the remote location from the "external-ids:ovn-remote" key, and
91 * the chassis name from the "external-ids:system-id" key in the
92 * Open_vSwitch table of the OVS database instance.
94 * xxx ovn-controller does not support changing any of these mid-run,
95 * xxx but that should be addressed later. */
97 get_core_config(struct controller_ctx *ctx, char **br_int_namep,
101 ovsdb_idl_run(ctx->ovs_idl);
103 const struct ovsrec_open_vswitch *cfg;
104 cfg = ovsrec_open_vswitch_first(ctx->ovs_idl);
106 VLOG_ERR("No Open_vSwitch row defined.");
107 ovsdb_idl_destroy(ctx->ovs_idl);
111 const struct ovsrec_bridge *br_int;
112 const char *remote, *system_id, *br_int_name;
114 br_int_name = smap_get(&cfg->external_ids, "ovn-bridge");
116 br_int_name = DEFAULT_BRIDGE_NAME;
119 br_int = get_bridge(ctx, br_int_name);
121 VLOG_INFO("Integration bridge '%s' does not exist. Waiting...",
126 remote = smap_get(&cfg->external_ids, "ovn-remote");
128 VLOG_INFO("OVN OVSDB remote not specified. Waiting...");
132 system_id = smap_get(&cfg->external_ids, "system-id");
134 VLOG_INFO("system-id not specified. Waiting...");
138 ovnsb_remote = xstrdup(remote);
139 *chassis_idp = xstrdup(system_id);
140 *br_int_namep = xstrdup(br_int_name);
144 ovsdb_idl_wait(ctx->ovs_idl);
151 struct ovsdb_idl *idl;
152 unsigned int skip_seqno;
154 struct ovsdb_idl_txn *committing_txn;
155 unsigned int precommit_seqno;
157 struct ovsdb_idl_txn *open_txn;
160 #define IDL_LOOP_INITIALIZER(IDL) { .idl = (IDL) }
163 idl_loop_destroy(struct idl_loop *loop)
166 ovsdb_idl_destroy(loop->idl);
170 static struct ovsdb_idl_txn *
171 idl_loop_run(struct idl_loop *loop)
173 ovsdb_idl_run(loop->idl);
174 loop->open_txn = (loop->committing_txn
175 || ovsdb_idl_get_seqno(loop->idl) == loop->skip_seqno
177 : ovsdb_idl_txn_create(loop->idl));
178 return loop->open_txn;
182 idl_loop_commit_and_wait(struct idl_loop *loop)
184 if (loop->open_txn) {
185 loop->committing_txn = loop->open_txn;
186 loop->open_txn = NULL;
188 loop->precommit_seqno = ovsdb_idl_get_seqno(loop->idl);
191 struct ovsdb_idl_txn *txn = loop->committing_txn;
193 enum ovsdb_idl_txn_status status = ovsdb_idl_txn_commit(txn);
194 if (status != TXN_INCOMPLETE) {
197 /* We want to re-evaluate the database when it's changed from
198 * the contents that it had when we started the commit. (That
199 * might have already happened.) */
200 loop->skip_seqno = loop->precommit_seqno;
201 if (ovsdb_idl_get_seqno(loop->idl) != loop->skip_seqno) {
202 poll_immediate_wake();
207 /* If the database has already changed since we started the
208 * commit, re-evaluate it immediately to avoid missing a change
210 if (ovsdb_idl_get_seqno(loop->idl) != loop->precommit_seqno) {
211 poll_immediate_wake();
221 case TXN_UNCOMMITTED:
226 ovsdb_idl_txn_destroy(txn);
227 loop->committing_txn = NULL;
231 ovsdb_idl_wait(loop->idl);
235 main(int argc, char *argv[])
237 struct unixctl_server *unixctl;
238 struct controller_ctx ctx = { .ovs_idl = NULL };
242 ovs_cmdl_proctitle_init(argc, argv);
243 set_program_name(argv[0]);
244 parse_options(argc, argv);
245 fatal_ignore_sigpipe();
249 retval = unixctl_server_create(NULL, &unixctl);
253 unixctl_command_register("exit", "", 0, 0, ovn_controller_exit, &exiting);
255 daemonize_complete();
262 /* Connect to OVS OVSDB instance. We do not monitor all tables by
263 * default, so modules must register their interest explicitly. */
264 ctx.ovs_idl = ovsdb_idl_create(ovs_remote, &ovsrec_idl_class, false, true);
266 /* Register interest in "external_ids" column in "Open_vSwitch" table,
267 * since we'll need to get the OVN OVSDB remote. */
268 ovsdb_idl_add_table(ctx.ovs_idl, &ovsrec_table_open_vswitch);
269 ovsdb_idl_add_column(ctx.ovs_idl, &ovsrec_open_vswitch_col_external_ids);
277 get_initial_snapshot(ctx.ovs_idl);
279 char *br_int_name, *chassis_id;
280 get_core_config(&ctx, &br_int_name, &chassis_id);
282 ctx.ovnsb_idl = ovsdb_idl_create(ovnsb_remote, &sbrec_idl_class,
284 get_initial_snapshot(ctx.ovnsb_idl);
286 struct idl_loop ovnsb_idl_loop = IDL_LOOP_INITIALIZER(ctx.ovnsb_idl);
287 struct idl_loop ovs_idl_loop = IDL_LOOP_INITIALIZER(ctx.ovs_idl);
292 ctx.ovnsb_idl_txn = idl_loop_run(&ovnsb_idl_loop);
293 ctx.ovs_idl_txn = idl_loop_run(&ovs_idl_loop);
295 /* xxx If run into any surprising changes, we exit. We should
296 * xxx handle this more gracefully. */
297 const struct ovsrec_bridge *br_int = get_bridge(&ctx, br_int_name);
299 VLOG_ERR("Integration bridge '%s' disappeared", br_int_name);
300 retval = EXIT_FAILURE;
304 chassis_run(&ctx, chassis_id);
305 encaps_run(&ctx, br_int, chassis_id);
306 binding_run(&ctx, br_int, chassis_id);
308 struct hmap flow_table = HMAP_INITIALIZER(&flow_table);
309 pipeline_run(&ctx, &flow_table);
310 physical_run(&ctx, br_int, chassis_id, &flow_table);
311 ofctrl_run(br_int, &flow_table);
312 hmap_destroy(&flow_table);
314 unixctl_server_run(unixctl);
316 unixctl_server_wait(unixctl);
318 poll_immediate_wake();
321 idl_loop_commit_and_wait(&ovnsb_idl_loop);
322 idl_loop_commit_and_wait(&ovs_idl_loop);
328 /* It's time to exit. Clean up the databases. */
331 ctx.ovnsb_idl_txn = idl_loop_run(&ovnsb_idl_loop);
332 ctx.ovs_idl_txn = idl_loop_run(&ovs_idl_loop);
334 /* xxx If run into any surprising changes, we exit. We should
335 * xxx handle this more gracefully. */
336 const struct ovsrec_bridge *br_int = get_bridge(&ctx, br_int_name);
338 VLOG_ERR("Integration bridge '%s' disappeared", br_int_name);
339 retval = EXIT_FAILURE;
343 /* Run all of the cleanup functions, even if one of them returns false.
344 * We're done if all of them return true. */
345 done = binding_cleanup(&ctx, chassis_id);
346 done = chassis_cleanup(&ctx, chassis_id) && done;
347 done = encaps_cleanup(&ctx, br_int) && done;
349 poll_immediate_wake();
352 idl_loop_commit_and_wait(&ovnsb_idl_loop);
353 idl_loop_commit_and_wait(&ovs_idl_loop);
358 unixctl_server_destroy(unixctl);
359 pipeline_destroy(&ctx);
362 idl_loop_destroy(&ovs_idl_loop);
363 idl_loop_destroy(&ovnsb_idl_loop);
374 parse_options(int argc, char *argv[])
377 OPT_PEER_CA_CERT = UCHAR_MAX + 1,
382 static struct option long_options[] = {
383 {"help", no_argument, NULL, 'h'},
384 {"version", no_argument, NULL, 'V'},
387 STREAM_SSL_LONG_OPTIONS,
388 {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
391 char *short_options = ovs_cmdl_long_options_to_short_options(long_options);
396 c = getopt_long(argc, argv, short_options, long_options, NULL);
406 ovs_print_version(OFP13_VERSION, OFP13_VERSION);
410 DAEMON_OPTION_HANDLERS
411 STREAM_SSL_OPTION_HANDLERS
413 case OPT_PEER_CA_CERT:
414 stream_ssl_set_peer_ca_cert_file(optarg);
430 ovs_remote = xasprintf("unix:%s/db.sock", ovs_rundir());
431 } else if (argc == 1) {
432 ovs_remote = xstrdup(argv[0]);
434 VLOG_FATAL("exactly zero or one non-option argument required; "
435 "use --help for usage");
442 printf("%s: OVN controller\n"
443 "usage %s [OPTIONS] [OVS-DATABASE]\n"
444 "where OVS-DATABASE is a socket on which the OVS OVSDB server is listening.\n",
445 program_name, program_name);
446 stream_usage("OVS-DATABASE", true, false, false);
449 printf("\nOther options:\n"
450 " -h, --help display this help message\n"
451 " -V, --version display version information\n");
456 ovn_controller_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
457 const char *argv[] OVS_UNUSED, void *exiting_)
459 bool *exiting = exiting_;
462 unixctl_command_reply(conn, NULL);