2 * Licensed under the Apache License, Version 2.0 (the "License");
3 * you may not use this file except in compliance with the License.
4 * You may obtain a copy of the License at:
6 * http://www.apache.org/licenses/LICENSE-2.0
8 * Unless required by applicable law or agreed to in writing, software
9 * distributed under the License is distributed on an "AS IS" BASIS,
10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 * See the License for the specific language governing permissions and
12 * limitations under the License.
21 #include "command-line.h"
24 #include "dynamic-string.h"
25 #include "fatal-signal.h"
29 #include "ovn/lib/lex.h"
30 #include "ovn/lib/ovn-nb-idl.h"
31 #include "ovn/lib/ovn-sb-idl.h"
32 #include "poll-loop.h"
34 #include "stream-ssl.h"
38 #include "openvswitch/vlog.h"
40 VLOG_DEFINE_THIS_MODULE(ovn_northd);
42 static unixctl_cb_func ovn_northd_exit;
44 struct northd_context {
45 struct ovsdb_idl *ovnnb_idl;
46 struct ovsdb_idl *ovnsb_idl;
47 struct ovsdb_idl_txn *ovnnb_txn;
48 struct ovsdb_idl_txn *ovnsb_txn;
51 static const char *ovnnb_db;
52 static const char *ovnsb_db;
54 static const char *default_db(void);
60 %s: OVN northbound management daemon\n\
61 usage: %s [OPTIONS]\n\
64 --ovnnb-db=DATABASE connect to ovn-nb database at DATABASE\n\
66 --ovnsb-db=DATABASE connect to ovn-sb database at DATABASE\n\
68 -h, --help display this help message\n\
69 -o, --options list available options\n\
70 -V, --version display version information\n\
71 ", program_name, program_name, default_db(), default_db());
74 stream_usage("database", true, true, false);
78 compare_strings(const void *a_, const void *b_)
82 return strcmp(*a, *b);
86 * Determine whether 2 arrays of MAC addresses are the same. It's possible that
87 * the lists could be *very* long and this check is being done a lot (every
88 * time the OVN_Northbound database changes).
91 macs_equal(char **binding_macs_, size_t b_n_macs,
92 char **lport_macs_, size_t l_n_macs)
94 char **binding_macs, **lport_macs;
97 if (b_n_macs != l_n_macs) {
101 bytes = b_n_macs * sizeof binding_macs_[0];
102 binding_macs = xmalloc(bytes);
103 lport_macs = xmalloc(bytes);
105 memcpy(binding_macs, binding_macs_, bytes);
106 memcpy(lport_macs, lport_macs_, bytes);
108 qsort(binding_macs, b_n_macs, sizeof binding_macs[0], compare_strings);
109 qsort(lport_macs, l_n_macs, sizeof lport_macs[0], compare_strings);
111 for (i = 0; i < b_n_macs; i++) {
112 if (strcmp(binding_macs[i], lport_macs[i])) {
120 return (i == b_n_macs) ? true : false;
123 /* Pipeline generation.
125 * This code generates the Pipeline table in the southbound database, as a
126 * function of most of the northbound database.
129 /* Enough context to add a Pipeline row, using pipeline_add(). */
130 struct pipeline_ctx {
131 /* From northd_context. */
132 struct ovsdb_idl *ovnsb_idl;
133 struct ovsdb_idl_txn *ovnsb_txn;
135 /* Contains "struct pipeline_hash_node"s. Used to figure out what existing
136 * Pipeline rows should be deleted: we index all of the Pipeline rows into
137 * this data structure, then as existing rows are generated we remove them.
138 * After generating all the rows, any remaining in 'pipeline_hmap' must be
139 * deleted from the database. */
140 struct hmap pipeline_hmap;
143 /* A row in the Pipeline table, indexed by its full contents, */
144 struct pipeline_hash_node {
145 struct hmap_node node;
146 const struct sbrec_pipeline *pipeline;
150 pipeline_hash(const struct uuid *logical_datapath, uint8_t table_id,
151 uint16_t priority, const char *match, const char *actions)
153 size_t hash = uuid_hash(logical_datapath);
154 hash = hash_2words((table_id << 16) | priority, hash);
155 hash = hash_string(match, hash);
156 return hash_string(actions, hash);
160 pipeline_hash_rec(const struct sbrec_pipeline *pipeline)
162 return pipeline_hash(&pipeline->logical_datapath, pipeline->table_id,
163 pipeline->priority, pipeline->match,
167 /* Adds a row with the specified contents to the Pipeline table. */
169 pipeline_add(struct pipeline_ctx *ctx,
170 const struct nbrec_logical_switch *logical_datapath,
176 struct pipeline_hash_node *hash_node;
178 /* Check whether such a row already exists in the Pipeline table. If so,
179 * remove it from 'ctx->pipeline_hmap' and we're done. */
180 HMAP_FOR_EACH_WITH_HASH (hash_node, node,
181 pipeline_hash(&logical_datapath->header_.uuid,
182 table_id, priority, match, actions),
183 &ctx->pipeline_hmap) {
184 const struct sbrec_pipeline *pipeline = hash_node->pipeline;
185 if (uuid_equals(&pipeline->logical_datapath,
186 &logical_datapath->header_.uuid)
187 && pipeline->table_id == table_id
188 && pipeline->priority == priority
189 && !strcmp(pipeline->match, match)
190 && !strcmp(pipeline->actions, actions)) {
191 hmap_remove(&ctx->pipeline_hmap, &hash_node->node);
197 /* No such Pipeline row. Add one. */
198 const struct sbrec_pipeline *pipeline;
199 pipeline = sbrec_pipeline_insert(ctx->ovnsb_txn);
200 sbrec_pipeline_set_logical_datapath(pipeline,
201 logical_datapath->header_.uuid);
202 sbrec_pipeline_set_table_id(pipeline, table_id);
203 sbrec_pipeline_set_priority(pipeline, priority);
204 sbrec_pipeline_set_match(pipeline, match);
205 sbrec_pipeline_set_actions(pipeline, actions);
208 /* Appends port security constraints on L2 address field 'eth_addr_field'
209 * (e.g. "eth.src" or "eth.dst") to 'match'. 'port_security', with
210 * 'n_port_security' elements, is the collection of port_security constraints
211 * from an OVN_NB Logical_Port row. */
213 build_port_security(const char *eth_addr_field,
214 char **port_security, size_t n_port_security,
217 size_t base_len = match->length;
218 ds_put_format(match, " && %s == {", eth_addr_field);
221 for (size_t i = 0; i < n_port_security; i++) {
222 uint8_t ea[ETH_ADDR_LEN];
224 if (eth_addr_from_string(port_security[i], ea)) {
225 ds_put_format(match, ETH_ADDR_FMT, ETH_ADDR_ARGS(ea));
226 ds_put_char(match, ' ');
230 ds_chomp(match, ' ');
231 ds_put_cstr(match, "}");
234 match->length = base_len;
239 lport_is_enabled(const struct nbrec_logical_port *lport)
241 return !lport->enabled || *lport->enabled;
244 /* Updates the Pipeline table in the OVN_SB database, constructing its contents
245 * based on the OVN_NB database. */
247 build_pipeline(struct northd_context *ctx)
249 struct pipeline_ctx pc = {
250 .ovnsb_idl = ctx->ovnsb_idl,
251 .ovnsb_txn = ctx->ovnsb_txn,
252 .pipeline_hmap = HMAP_INITIALIZER(&pc.pipeline_hmap)
255 /* Add all the Pipeline entries currently in the southbound database to
256 * 'pc.pipeline_hmap'. We remove entries that we generate from the hmap,
257 * thus by the time we're done only entries that need to be removed
259 const struct sbrec_pipeline *pipeline;
260 SBREC_PIPELINE_FOR_EACH (pipeline, ctx->ovnsb_idl) {
261 struct pipeline_hash_node *hash_node = xzalloc(sizeof *hash_node);
262 hash_node->pipeline = pipeline;
263 hmap_insert(&pc.pipeline_hmap, &hash_node->node,
264 pipeline_hash_rec(pipeline));
267 /* Table 0: Admission control framework. */
268 const struct nbrec_logical_switch *lswitch;
269 NBREC_LOGICAL_SWITCH_FOR_EACH (lswitch, ctx->ovnnb_idl) {
270 /* Logical VLANs not supported. */
271 pipeline_add(&pc, lswitch, 0, 100, "vlan.present", "drop;");
273 /* Broadcast/multicast source address is invalid. */
274 pipeline_add(&pc, lswitch, 0, 100, "eth.src[40]", "drop;");
276 /* Port security flows have priority 50 (see below) and will continue
277 * to the next table if packet source is acceptable. */
279 /* Otherwise drop the packet. */
280 pipeline_add(&pc, lswitch, 0, 0, "1", "drop;");
283 /* Table 0: Ingress port security. */
284 NBREC_LOGICAL_SWITCH_FOR_EACH (lswitch, ctx->ovnnb_idl) {
285 for (size_t i = 0; i < lswitch->n_ports; i++) {
286 const struct nbrec_logical_port *lport = lswitch->ports[i];
287 struct ds match = DS_EMPTY_INITIALIZER;
288 ds_put_cstr(&match, "inport == ");
289 json_string_escape(lport->name, &match);
290 build_port_security("eth.src",
291 lport->port_security, lport->n_port_security,
293 pipeline_add(&pc, lswitch, 0, 50, ds_cstr(&match),
294 lport_is_enabled(lport) ? "next;" : "drop;");
299 /* Table 1: Destination lookup:
301 * - Broadcast and multicast handling (priority 100).
302 * - Unicast handling (priority 50).
303 * - Unknown unicast address handling (priority 0).
305 NBREC_LOGICAL_SWITCH_FOR_EACH (lswitch, ctx->ovnnb_idl) {
306 struct ds bcast; /* Actions for broadcast on 'lswitch'. */
307 struct ds unknown; /* Actions for unknown MACs on 'lswitch'. */
311 for (size_t i = 0; i < lswitch->n_ports; i++) {
312 const struct nbrec_logical_port *lport = lswitch->ports[i];
314 ds_put_cstr(&bcast, "outport = ");
315 json_string_escape(lport->name, &bcast);
316 ds_put_cstr(&bcast, "; next; ");
318 for (size_t j = 0; j < lport->n_macs; j++) {
319 const char *s = lport->macs[j];
320 uint8_t mac[ETH_ADDR_LEN];
322 if (eth_addr_from_string(s, mac)) {
323 struct ds match, unicast;
326 ds_put_format(&match, "eth.dst == %s", s);
329 ds_put_cstr(&unicast, "outport = ");
330 json_string_escape(lport->name, &unicast);
331 ds_put_cstr(&unicast, "; next;");
332 pipeline_add(&pc, lswitch, 1, 50,
333 ds_cstr(&match), ds_cstr(&unicast));
334 ds_destroy(&unicast);
336 } else if (!strcmp(s, "unknown")) {
337 ds_put_cstr(&unknown, "outport = ");
338 json_string_escape(lport->name, &unknown);
339 ds_put_cstr(&unknown, "; next; ");
341 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
343 VLOG_INFO_RL(&rl, "%s: invalid syntax '%s' in macs column",
349 ds_chomp(&bcast, ' ');
350 pipeline_add(&pc, lswitch, 1, 100, "eth.dst[40]", ds_cstr(&bcast));
353 if (unknown.length) {
354 ds_chomp(&unknown, ' ');
355 pipeline_add(&pc, lswitch, 1, 0, "1", ds_cstr(&unknown));
357 ds_destroy(&unknown);
361 NBREC_LOGICAL_SWITCH_FOR_EACH (lswitch, ctx->ovnnb_idl) {
362 for (size_t i = 0; i < lswitch->n_acls; i++) {
363 const struct nbrec_acl *acl = lswitch->acls[i];
365 NBREC_ACL_FOR_EACH (acl, ctx->ovnnb_idl) {
366 pipeline_add(&pc, lswitch, 2, acl->priority, acl->match,
367 (!strcmp(acl->action, "allow") ||
368 !strcmp(acl->action, "allow-related")
369 ? "next;" : "drop;"));
373 pipeline_add(&pc, lswitch, 2, 0, "1", "next;");
376 /* Table 3: Egress port security. */
377 NBREC_LOGICAL_SWITCH_FOR_EACH (lswitch, ctx->ovnnb_idl) {
378 pipeline_add(&pc, lswitch, 3, 100, "eth.dst[40]", "output;");
380 for (size_t i = 0; i < lswitch->n_ports; i++) {
381 const struct nbrec_logical_port *lport = lswitch->ports[i];
385 ds_put_cstr(&match, "outport == ");
386 json_string_escape(lport->name, &match);
387 build_port_security("eth.dst",
388 lport->port_security, lport->n_port_security,
391 pipeline_add(&pc, lswitch, 3, 50, ds_cstr(&match),
392 lport_is_enabled(lport) ? "output;" : "drop;");
398 /* Delete any existing Pipeline rows that were not re-generated. */
399 struct pipeline_hash_node *hash_node, *next_hash_node;
400 HMAP_FOR_EACH_SAFE (hash_node, next_hash_node, node, &pc.pipeline_hmap) {
401 hmap_remove(&pc.pipeline_hmap, &hash_node->node);
402 sbrec_pipeline_delete(hash_node->pipeline);
405 hmap_destroy(&pc.pipeline_hmap);
409 * Take two string columns and return true if:
411 * - both are set and the strings are equal
414 strings_equal(const char *s1, const char *s2)
417 /* One is set and the other is not. */
423 return strcmp(s1, s2) ? false : true;
431 * Take two int64_t columns and return true if either:
433 * - both are set and the first integers in each are equal
436 int64_first_equal(int64_t *i1, size_t n_i1, int64_t *i2, size_t n_i2)
442 return i1 ? (i1[0] == i2[0]) : true;
445 struct binding_hash_node {
446 struct hmap_node lp_node; /* In 'lp_map', by binding->logical_port. */
447 struct hmap_node tk_node; /* In 'tk_map', by binding->tunnel_key. */
448 const struct sbrec_binding *binding;
452 tunnel_key_in_use(const struct hmap *tk_hmap, uint16_t tunnel_key)
454 const struct binding_hash_node *hash_node;
456 HMAP_FOR_EACH_IN_BUCKET (hash_node, tk_node, hash_int(tunnel_key, 0),
458 if (hash_node->binding->tunnel_key == tunnel_key) {
465 /* Chooses and returns a positive tunnel key that is not already in use in
466 * 'tk_hmap'. Returns 0 if all tunnel keys are in use. */
468 choose_tunnel_key(const struct hmap *tk_hmap)
470 static uint16_t prev;
472 for (uint16_t key = prev + 1; key != prev; key++) {
473 if (!tunnel_key_in_use(tk_hmap, key)) {
479 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
480 VLOG_WARN_RL(&rl, "all tunnel keys exhausted");
485 * When a change has occurred in the OVN_Northbound database, we go through and
486 * make sure that the contents of the Binding table in the OVN_Southbound
487 * database are up to date with the logical ports defined in the
488 * OVN_Northbound database.
491 set_bindings(struct northd_context *ctx)
493 const struct sbrec_binding *binding;
496 * We will need to look up a binding for every logical port. We don't want
497 * to have to do an O(n) search for every binding, so start out by hashing
498 * them on the logical port.
500 * As we go through every logical port, we will update the binding if it
501 * exists or create one otherwise. When the update is done, we'll remove
502 * it from the hashmap. At the end, any bindings left in the hashmap are
503 * for logical ports that have been deleted.
505 * We index the logical_port column because that's the shared key between
506 * the OVN_NB and OVN_SB databases. We index the tunnel_key column to
507 * allow us to choose a unique tunnel key for any Binding rows we have to
510 struct hmap lp_hmap = HMAP_INITIALIZER(&lp_hmap);
511 struct hmap tk_hmap = HMAP_INITIALIZER(&tk_hmap);
513 SBREC_BINDING_FOR_EACH(binding, ctx->ovnsb_idl) {
514 struct binding_hash_node *hash_node = xzalloc(sizeof *hash_node);
515 hash_node->binding = binding;
516 hmap_insert(&lp_hmap, &hash_node->lp_node,
517 hash_string(binding->logical_port, 0));
518 hmap_insert(&tk_hmap, &hash_node->tk_node,
519 hash_int(binding->tunnel_key, 0));
522 const struct nbrec_logical_switch *lswitch;
523 NBREC_LOGICAL_SWITCH_FOR_EACH (lswitch, ctx->ovnnb_idl) {
524 const struct uuid *logical_datapath = &lswitch->header_.uuid;
526 for (size_t i = 0; i < lswitch->n_ports; i++) {
527 const struct nbrec_logical_port *lport = lswitch->ports[i];
528 struct binding_hash_node *hash_node;
530 HMAP_FOR_EACH_WITH_HASH(hash_node, lp_node,
531 hash_string(lport->name, 0), &lp_hmap) {
532 if (!strcmp(lport->name, hash_node->binding->logical_port)) {
533 binding = hash_node->binding;
539 /* We found an existing binding for this logical port. Update
542 hmap_remove(&lp_hmap, &hash_node->lp_node);
544 if (!macs_equal(binding->mac, binding->n_mac,
545 lport->macs, lport->n_macs)) {
546 sbrec_binding_set_mac(binding, (const char **) lport->macs,
549 if (!strings_equal(binding->parent_port, lport->parent_name)) {
550 sbrec_binding_set_parent_port(binding, lport->parent_name);
552 if (!int64_first_equal(binding->tag, binding->n_tag,
553 lport->tag, lport->n_tag)) {
554 sbrec_binding_set_tag(binding, lport->tag, lport->n_tag);
556 if (!uuid_equals(&binding->logical_datapath,
558 sbrec_binding_set_logical_datapath(binding,
562 /* There is no binding for this logical port, so create one. */
564 uint16_t tunnel_key = choose_tunnel_key(&tk_hmap);
569 binding = sbrec_binding_insert(ctx->ovnsb_txn);
570 sbrec_binding_set_logical_port(binding, lport->name);
571 sbrec_binding_set_mac(binding, (const char **) lport->macs,
573 if (lport->parent_name && lport->n_tag > 0) {
574 sbrec_binding_set_parent_port(binding, lport->parent_name);
575 sbrec_binding_set_tag(binding, lport->tag, lport->n_tag);
578 sbrec_binding_set_tunnel_key(binding, tunnel_key);
579 sbrec_binding_set_logical_datapath(binding, *logical_datapath);
581 /* Add the tunnel key to the tk_hmap so that we don't try to
582 * use it for another port. (We don't want it in the lp_hmap
583 * because that would just get the Binding record deleted
585 struct binding_hash_node *hash_node
586 = xzalloc(sizeof *hash_node);
587 hash_node->binding = binding;
588 hmap_insert(&tk_hmap, &hash_node->tk_node,
589 hash_int(binding->tunnel_key, 0));
594 struct binding_hash_node *hash_node;
595 HMAP_FOR_EACH (hash_node, lp_node, &lp_hmap) {
596 hmap_remove(&lp_hmap, &hash_node->lp_node);
597 sbrec_binding_delete(hash_node->binding);
599 hmap_destroy(&lp_hmap);
601 struct binding_hash_node *hash_node_next;
602 HMAP_FOR_EACH_SAFE (hash_node, hash_node_next, tk_node, &tk_hmap) {
603 hmap_remove(&tk_hmap, &hash_node->tk_node);
606 hmap_destroy(&tk_hmap);
610 ovnnb_db_changed(struct northd_context *ctx)
612 VLOG_DBG("ovn-nb db contents have changed.");
619 * The only change we get notified about is if the 'chassis' column of the
620 * 'Binding' table changes. When this column is not empty, it means we need to
621 * set the corresponding logical port as 'up' in the northbound DB.
624 ovnsb_db_changed(struct northd_context *ctx)
626 struct hmap lports_hmap;
627 const struct sbrec_binding *binding;
628 const struct nbrec_logical_port *lport;
630 struct lport_hash_node {
631 struct hmap_node node;
632 const struct nbrec_logical_port *lport;
633 } *hash_node, *hash_node_next;
635 VLOG_DBG("Recalculating port up states for ovn-nb db.");
637 hmap_init(&lports_hmap);
639 NBREC_LOGICAL_PORT_FOR_EACH(lport, ctx->ovnnb_idl) {
640 hash_node = xzalloc(sizeof *hash_node);
641 hash_node->lport = lport;
642 hmap_insert(&lports_hmap, &hash_node->node,
643 hash_string(lport->name, 0));
646 SBREC_BINDING_FOR_EACH(binding, ctx->ovnsb_idl) {
648 HMAP_FOR_EACH_WITH_HASH(hash_node, node,
649 hash_string(binding->logical_port, 0), &lports_hmap) {
650 if (!strcmp(binding->logical_port, hash_node->lport->name)) {
651 lport = hash_node->lport;
657 /* The logical port doesn't exist for this binding. This can
658 * happen under normal circumstances when ovn-northd hasn't gotten
659 * around to pruning the Binding yet. */
663 if (binding->chassis && (!lport->up || !*lport->up)) {
665 nbrec_logical_port_set_up(lport, &up, 1);
666 } else if (!binding->chassis && (!lport->up || *lport->up)) {
668 nbrec_logical_port_set_up(lport, &up, 1);
672 HMAP_FOR_EACH_SAFE(hash_node, hash_node_next, node, &lports_hmap) {
673 hmap_remove(&lports_hmap, &hash_node->node);
676 hmap_destroy(&lports_hmap);
684 def = xasprintf("unix:%s/db.sock", ovs_rundir());
690 parse_options(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
696 static const struct option long_options[] = {
697 {"ovnsb-db", required_argument, NULL, 'd'},
698 {"ovnnb-db", required_argument, NULL, 'D'},
699 {"help", no_argument, NULL, 'h'},
700 {"options", no_argument, NULL, 'o'},
701 {"version", no_argument, NULL, 'V'},
704 STREAM_SSL_LONG_OPTIONS,
707 char *short_options = ovs_cmdl_long_options_to_short_options(long_options);
712 c = getopt_long(argc, argv, short_options, long_options, NULL);
718 DAEMON_OPTION_HANDLERS;
719 VLOG_OPTION_HANDLERS;
720 STREAM_SSL_OPTION_HANDLERS;
735 ovs_cmdl_print_options(long_options);
739 ovs_print_version(0, 0);
748 ovnsb_db = default_db();
752 ovnnb_db = default_db();
759 main(int argc, char *argv[])
761 extern struct vlog_module VLM_reconnect;
762 struct ovsdb_idl *ovnnb_idl, *ovnsb_idl;
763 unsigned int ovnnb_seqno, ovn_seqno;
764 int res = EXIT_SUCCESS;
765 struct northd_context ctx = {
768 bool ovnnb_changes_pending = false;
769 bool ovn_changes_pending = false;
770 struct unixctl_server *unixctl;
774 fatal_ignore_sigpipe();
775 set_program_name(argv[0]);
776 vlog_set_levels(NULL, VLF_CONSOLE, VLL_WARN);
777 vlog_set_levels(&VLM_reconnect, VLF_ANY_DESTINATION, VLL_WARN);
778 parse_options(argc, argv);
782 retval = unixctl_server_create(NULL, &unixctl);
786 unixctl_command_register("exit", "", 0, 0, ovn_northd_exit, &exiting);
788 daemonize_complete();
793 /* We want to detect all changes to the ovn-nb db. */
794 ctx.ovnnb_idl = ovnnb_idl = ovsdb_idl_create(ovnnb_db,
795 &nbrec_idl_class, true, true);
797 /* There is only a small subset of changes to the ovn-sb db that ovn-northd
798 * has to care about, so we'll enable monitoring those directly. */
799 ctx.ovnsb_idl = ovnsb_idl = ovsdb_idl_create(ovnsb_db,
800 &sbrec_idl_class, false, true);
801 ovsdb_idl_add_table(ovnsb_idl, &sbrec_table_binding);
802 ovsdb_idl_add_column(ovnsb_idl, &sbrec_binding_col_logical_port);
803 ovsdb_idl_add_column(ovnsb_idl, &sbrec_binding_col_chassis);
804 ovsdb_idl_add_column(ovnsb_idl, &sbrec_binding_col_mac);
805 ovsdb_idl_add_column(ovnsb_idl, &sbrec_binding_col_tag);
806 ovsdb_idl_add_column(ovnsb_idl, &sbrec_binding_col_parent_port);
807 ovsdb_idl_add_column(ovnsb_idl, &sbrec_binding_col_logical_datapath);
808 ovsdb_idl_add_column(ovnsb_idl, &sbrec_binding_col_tunnel_key);
809 ovsdb_idl_add_column(ovnsb_idl, &sbrec_pipeline_col_logical_datapath);
810 ovsdb_idl_omit_alert(ovnsb_idl, &sbrec_pipeline_col_logical_datapath);
811 ovsdb_idl_add_column(ovnsb_idl, &sbrec_pipeline_col_table_id);
812 ovsdb_idl_omit_alert(ovnsb_idl, &sbrec_pipeline_col_table_id);
813 ovsdb_idl_add_column(ovnsb_idl, &sbrec_pipeline_col_priority);
814 ovsdb_idl_omit_alert(ovnsb_idl, &sbrec_pipeline_col_priority);
815 ovsdb_idl_add_column(ovnsb_idl, &sbrec_pipeline_col_match);
816 ovsdb_idl_omit_alert(ovnsb_idl, &sbrec_pipeline_col_match);
817 ovsdb_idl_add_column(ovnsb_idl, &sbrec_pipeline_col_actions);
818 ovsdb_idl_omit_alert(ovnsb_idl, &sbrec_pipeline_col_actions);
821 * The loop here just runs the IDL in a loop waiting for the seqno to
822 * change, which indicates that the contents of the db have changed.
824 * If the contents of the ovn-nb db change, the mappings to the ovn-sb
825 * db must be recalculated.
827 * If the contents of the ovn-sb db change, it means the 'up' state of
828 * a port may have changed, as that's the only type of change ovn-northd is
832 ovnnb_seqno = ovsdb_idl_get_seqno(ovnnb_idl);
833 ovn_seqno = ovsdb_idl_get_seqno(ovnsb_idl);
836 ovsdb_idl_run(ovnnb_idl);
837 ovsdb_idl_run(ovnsb_idl);
838 unixctl_server_run(unixctl);
840 if (!ovsdb_idl_is_alive(ovnnb_idl)) {
841 int retval = ovsdb_idl_get_last_error(ovnnb_idl);
842 VLOG_ERR("%s: database connection failed (%s)",
843 ovnnb_db, ovs_retval_to_string(retval));
848 if (!ovsdb_idl_is_alive(ovnsb_idl)) {
849 int retval = ovsdb_idl_get_last_error(ovnsb_idl);
850 VLOG_ERR("%s: database connection failed (%s)",
851 ovnsb_db, ovs_retval_to_string(retval));
856 if (ovnnb_seqno != ovsdb_idl_get_seqno(ovnnb_idl)) {
857 ovnnb_seqno = ovsdb_idl_get_seqno(ovnnb_idl);
858 ovnnb_changes_pending = true;
861 if (ovn_seqno != ovsdb_idl_get_seqno(ovnsb_idl)) {
862 ovn_seqno = ovsdb_idl_get_seqno(ovnsb_idl);
863 ovn_changes_pending = true;
867 * If there are any pending changes, we delay recalculating the
868 * necessary updates until after an existing transaction finishes.
869 * This avoids the possibility of rapid updates causing ovn-northd to
870 * never be able to successfully make the corresponding updates to the
871 * other db. Instead, pending changes are batched up until the next
872 * time we get a chance to calculate the new state and apply it.
875 if (ovnnb_changes_pending && !ctx.ovnsb_txn) {
877 * The OVN-nb db contents have changed, so create a transaction for
878 * updating the OVN-sb DB.
880 ctx.ovnsb_txn = ovsdb_idl_txn_create(ctx.ovnsb_idl);
881 ovsdb_idl_txn_add_comment(ctx.ovnsb_txn,
882 "ovn-northd: northbound db changed");
883 ovnnb_db_changed(&ctx);
884 ovnnb_changes_pending = false;
887 if (ovn_changes_pending && !ctx.ovnnb_txn) {
889 * The OVN-sb db contents have changed, so create a transaction for
890 * updating the northbound DB.
892 ctx.ovnnb_txn = ovsdb_idl_txn_create(ctx.ovnnb_idl);
893 ovsdb_idl_txn_add_comment(ctx.ovnnb_txn,
894 "ovn-northd: southbound db changed");
895 ovnsb_db_changed(&ctx);
896 ovn_changes_pending = false;
900 enum ovsdb_idl_txn_status txn_status;
901 txn_status = ovsdb_idl_txn_commit(ctx.ovnnb_txn);
902 switch (txn_status) {
903 case TXN_UNCOMMITTED:
905 /* Come back around and try to commit this transaction again */
911 /* Something went wrong, so try creating a new transaction. */
912 ovn_changes_pending = true;
915 ovsdb_idl_txn_destroy(ctx.ovnnb_txn);
916 ctx.ovnnb_txn = NULL;
921 enum ovsdb_idl_txn_status txn_status;
922 txn_status = ovsdb_idl_txn_commit(ctx.ovnsb_txn);
923 switch (txn_status) {
924 case TXN_UNCOMMITTED:
926 /* Come back around and try to commit this transaction again */
932 /* Something went wrong, so try creating a new transaction. */
933 ovnnb_changes_pending = true;
936 ovsdb_idl_txn_destroy(ctx.ovnsb_txn);
937 ctx.ovnsb_txn = NULL;
941 if (ovnnb_seqno == ovsdb_idl_get_seqno(ovnnb_idl) &&
942 ovn_seqno == ovsdb_idl_get_seqno(ovnsb_idl)) {
943 ovsdb_idl_wait(ovnnb_idl);
944 ovsdb_idl_wait(ovnsb_idl);
946 ovsdb_idl_txn_wait(ctx.ovnnb_txn);
949 ovsdb_idl_txn_wait(ctx.ovnsb_txn);
951 unixctl_server_wait(unixctl);
953 poll_immediate_wake();
959 unixctl_server_destroy(unixctl);
960 ovsdb_idl_destroy(ovnsb_idl);
961 ovsdb_idl_destroy(ovnnb_idl);
967 ovn_northd_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
968 const char *argv[] OVS_UNUSED, void *exiting_)
970 bool *exiting = exiting_;
973 unixctl_command_reply(conn, NULL);