2 * Copyright (c) 2010, 2011, 2012 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
25 #include "byte-order.h"
26 #include "dynamic-string.h"
32 #include "poll-loop.h"
39 VLOG_DEFINE_THIS_MODULE(cfm);
41 #define CFM_MAX_RMPS 256
43 /* Ethernet destination address of CCM packets. */
44 static const uint8_t eth_addr_ccm[6] = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x30 };
45 static const uint8_t eth_addr_ccm_x[6] = {
46 0x01, 0x23, 0x20, 0x00, 0x00, 0x30
49 #define ETH_TYPE_CFM 0x8902
51 /* A 'ccm' represents a Continuity Check Message from the 802.1ag
52 * specification. Continuity Check Messages are broadcast periodically so that
53 * hosts can determine whom they have connectivity to.
55 * The minimum length of a CCM as specified by IEEE 802.1ag is 75 bytes.
56 * Previous versions of Open vSwitch generated 74-byte CCM messages, so we
57 * accept such messages too. */
59 #define CCM_ACCEPT_LEN 74
60 #define CCM_MAID_LEN 48
61 #define CCM_OPCODE 1 /* CFM message opcode meaning CCM. */
62 #define CCM_RDI_MASK 0x80
63 #define CFM_HEALTH_INTERVAL 6
65 uint8_t mdlevel_version; /* MD Level and Version */
71 uint8_t maid[CCM_MAID_LEN];
73 /* Defined by ITU-T Y.1731 should be zero */
74 ovs_be16 interval_ms_x; /* Transmission interval in ms. */
75 ovs_be64 mpid64; /* MPID in extended mode. */
76 uint8_t opdown; /* Operationally down. */
81 } __attribute__((packed));
82 BUILD_ASSERT_DECL(CCM_LEN == sizeof(struct ccm));
85 char *name; /* Name of this CFM object. */
86 struct hmap_node hmap_node; /* Node in all_cfms list. */
89 bool check_tnl_key; /* Verify the tunnel key of inbound packets? */
90 bool extended; /* Extended mode. */
91 bool booted; /* A full fault interval has occured. */
92 enum cfm_fault_reason fault; /* Connectivity fault status. */
93 enum cfm_fault_reason recv_fault; /* Bit mask of faults occuring on
95 bool opup; /* Operational State. */
96 bool remote_opup; /* Remote Operational State. */
98 int fault_override; /* Manual override of 'fault' status.
99 Ignored if negative. */
101 uint32_t seq; /* The sequence number of our last CCM. */
102 uint8_t ccm_interval; /* The CCM transmission interval. */
103 int ccm_interval_ms; /* 'ccm_interval' in milliseconds. */
104 uint16_t ccm_vlan; /* Vlan tag of CCM PDUs. CFM_RANDOM_VLAN if
106 uint8_t ccm_pcp; /* Priority of CCM PDUs. */
107 uint8_t maid[CCM_MAID_LEN]; /* The MAID of this CFM. */
109 struct timer tx_timer; /* Send CCM when expired. */
110 struct timer fault_timer; /* Check for faults when expired. */
112 struct hmap remote_mps; /* Remote MPs. */
114 /* Result of cfm_get_remote_mpids(). Updated only during fault check to
116 uint64_t *rmps_array; /* Cache of remote_mps. */
117 size_t rmps_array_len; /* Number of rmps in 'rmps_array'. */
119 int health; /* Percentage of the number of CCM frames
121 int health_interval; /* Number of fault_intervals since health was
123 long long int last_tx; /* Last CCM transmission time. */
126 /* Remote MPs represent foreign network entities that are configured to have
127 * the same MAID as this CFM instance. */
129 uint64_t mpid; /* The Maintenance Point ID of this 'remote_mp'. */
130 struct hmap_node node; /* Node in 'remote_mps' map. */
132 bool recv; /* CCM was received since last fault check. */
133 bool opup; /* Operational State. */
134 uint32_t seq; /* Most recently received sequence number. */
135 uint8_t num_health_ccm; /* Number of received ccm frames every
136 CFM_HEALTH_INTERVAL * 'fault_interval'. */
137 long long int last_rx; /* Last CCM reception time. */
141 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(20, 30);
142 static struct hmap all_cfms = HMAP_INITIALIZER(&all_cfms);
144 static unixctl_cb_func cfm_unixctl_show;
145 static unixctl_cb_func cfm_unixctl_set_fault;
147 static const uint8_t *
148 cfm_ccm_addr(const struct cfm *cfm)
150 return cfm->extended ? eth_addr_ccm_x : eth_addr_ccm;
153 /* Returns the string representation of the given cfm_fault_reason 'reason'. */
155 cfm_fault_reason_to_str(int reason) {
157 #define CFM_FAULT_REASON(NAME, STR) case CFM_FAULT_##NAME: return #STR;
159 #undef CFM_FAULT_REASON
160 default: return "<unknown>";
165 ds_put_cfm_fault(struct ds *ds, int fault)
169 for (i = 0; i < CFM_FAULT_N_REASONS; i++) {
172 if (fault & reason) {
173 ds_put_format(ds, "%s ", cfm_fault_reason_to_str(reason));
181 cfm_generate_maid(struct cfm *cfm)
183 const char *ovs_md_name = "ovs";
184 const char *ovs_ma_name = "ovs";
186 size_t md_len, ma_len;
188 memset(cfm->maid, 0, CCM_MAID_LEN);
190 md_len = strlen(ovs_md_name);
191 ma_len = strlen(ovs_ma_name);
193 assert(md_len && ma_len && md_len + ma_len + 4 <= CCM_MAID_LEN);
195 cfm->maid[0] = 4; /* MD name string format. */
196 cfm->maid[1] = md_len; /* MD name size. */
197 memcpy(&cfm->maid[2], ovs_md_name, md_len); /* MD name. */
199 ma_p = cfm->maid + 2 + md_len;
200 ma_p[0] = 2; /* MA name string format. */
201 ma_p[1] = ma_len; /* MA name size. */
202 memcpy(&ma_p[2], ovs_ma_name, ma_len); /* MA name. */
206 ccm_interval_to_ms(uint8_t interval)
209 case 0: NOT_REACHED(); /* Explicitly not supported by 802.1ag. */
210 case 1: return 3; /* Not recommended due to timer resolution. */
211 case 2: return 10; /* Not recommended due to timer resolution. */
214 case 5: return 10000;
215 case 6: return 60000;
216 case 7: return 600000;
217 default: NOT_REACHED(); /* Explicitly not supported by 802.1ag. */
224 cfm_fault_interval(struct cfm *cfm)
226 /* According to the 802.1ag specification we should assume every other MP
227 * with the same MAID has the same transmission interval that we have. If
228 * an MP has a different interval, cfm_process_heartbeat will register it
229 * as a fault (likely due to a configuration error). Thus we can check all
230 * MPs at once making this quite a bit simpler.
232 * According to the specification we should check when (ccm_interval_ms *
233 * 3.5)ms have passed. */
234 return (cfm->ccm_interval_ms * 7) / 2;
238 ms_to_ccm_interval(int interval_ms)
242 for (i = 7; i > 0; i--) {
243 if (ccm_interval_to_ms(i) <= interval_ms) {
252 hash_mpid(uint64_t mpid)
254 return hash_bytes(&mpid, sizeof mpid, 0);
258 cfm_is_valid_mpid(bool extended, uint64_t mpid)
260 /* 802.1ag specification requires MPIDs to be within the range [1, 8191].
261 * In extended mode we relax this requirement. */
262 return mpid >= 1 && (extended || mpid <= 8191);
265 static struct remote_mp *
266 lookup_remote_mp(const struct cfm *cfm, uint64_t mpid)
268 struct remote_mp *rmp;
270 HMAP_FOR_EACH_IN_BUCKET (rmp, node, hash_mpid(mpid), &cfm->remote_mps) {
271 if (rmp->mpid == mpid) {
282 unixctl_command_register("cfm/show", "[interface]", 0, 1, cfm_unixctl_show,
284 unixctl_command_register("cfm/set-fault", "[interface] normal|false|true",
285 1, 2, cfm_unixctl_set_fault, NULL);
288 /* Allocates a 'cfm' object called 'name'. 'cfm' should be initialized by
289 * cfm_configure() before use. */
291 cfm_create(const char *name)
295 cfm = xzalloc(sizeof *cfm);
296 cfm->name = xstrdup(name);
297 hmap_init(&cfm->remote_mps);
298 cfm_generate_maid(cfm);
299 hmap_insert(&all_cfms, &cfm->hmap_node, hash_string(cfm->name, 0));
300 cfm->remote_opup = true;
301 cfm->fault_override = -1;
308 cfm_destroy(struct cfm *cfm)
310 struct remote_mp *rmp, *rmp_next;
316 HMAP_FOR_EACH_SAFE (rmp, rmp_next, node, &cfm->remote_mps) {
317 hmap_remove(&cfm->remote_mps, &rmp->node);
321 hmap_destroy(&cfm->remote_mps);
322 hmap_remove(&all_cfms, &cfm->hmap_node);
323 free(cfm->rmps_array);
328 /* Should be run periodically to update fault statistics messages. */
330 cfm_run(struct cfm *cfm)
332 if (timer_expired(&cfm->fault_timer)) {
333 long long int interval = cfm_fault_interval(cfm);
334 struct remote_mp *rmp, *rmp_next;
335 bool old_cfm_fault = cfm->fault;
337 cfm->fault = cfm->recv_fault;
340 cfm->rmps_array_len = 0;
341 free(cfm->rmps_array);
342 cfm->rmps_array = xmalloc(hmap_count(&cfm->remote_mps) *
343 sizeof *cfm->rmps_array);
345 cfm->remote_opup = true;
346 if (cfm->health_interval == CFM_HEALTH_INTERVAL) {
347 /* Calculate the cfm health of the interface. If the number of
348 * remote_mpids of a cfm interface is > 1, the cfm health is
349 * undefined. If the number of remote_mpids is 1, the cfm health is
350 * the percentage of the ccm frames received in the
351 * (CFM_HEALTH_INTERVAL * 3.5)ms, else it is 0. */
352 if (hmap_count(&cfm->remote_mps) > 1) {
354 } else if (hmap_is_empty(&cfm->remote_mps)) {
359 rmp = CONTAINER_OF(hmap_first(&cfm->remote_mps),
360 struct remote_mp, node);
361 exp_ccm_recvd = (CFM_HEALTH_INTERVAL * 7) / 2;
362 /* Calculate the percentage of healthy ccm frames received.
363 * Since the 'fault_interval' is (3.5 * cfm_interval), and
364 * 1 CCM packet must be received every cfm_interval,
365 * the 'remote_mpid' health reports the percentage of
366 * healthy CCM frames received every
367 * 'CFM_HEALTH_INTERVAL'th 'fault_interval'. */
368 cfm->health = (rmp->num_health_ccm * 100) / exp_ccm_recvd;
369 cfm->health = MIN(cfm->health, 100);
370 rmp->num_health_ccm = 0;
371 assert(cfm->health >= 0 && cfm->health <= 100);
373 cfm->health_interval = 0;
375 cfm->health_interval++;
377 HMAP_FOR_EACH_SAFE (rmp, rmp_next, node, &cfm->remote_mps) {
380 VLOG_INFO("%s: Received no CCM from RMP %"PRIu64" in the last"
381 " %lldms", cfm->name, rmp->mpid,
382 time_msec() - rmp->last_rx);
383 hmap_remove(&cfm->remote_mps, &rmp->node);
389 cfm->remote_opup = rmp->opup;
392 cfm->rmps_array[cfm->rmps_array_len++] = rmp->mpid;
396 if (hmap_is_empty(&cfm->remote_mps)) {
397 cfm->fault |= CFM_FAULT_RECV;
400 if (old_cfm_fault != cfm->fault && !VLOG_DROP_INFO(&rl)) {
401 struct ds ds = DS_EMPTY_INITIALIZER;
403 ds_put_cstr(&ds, "from [");
404 ds_put_cfm_fault(&ds, old_cfm_fault);
405 ds_put_cstr(&ds, "] to [");
406 ds_put_cfm_fault(&ds, cfm->fault);
407 ds_put_char(&ds, ']');
408 VLOG_INFO("%s: CFM faults changed %s.", cfm->name, ds_cstr(&ds));
413 timer_set_duration(&cfm->fault_timer, interval);
414 VLOG_DBG("%s: new fault interval", cfm->name);
418 /* Should be run periodically to check if the CFM module has a CCM message it
421 cfm_should_send_ccm(struct cfm *cfm)
423 return timer_expired(&cfm->tx_timer);
426 /* Composes a CCM message into 'packet'. Messages generated with this function
427 * should be sent whenever cfm_should_send_ccm() indicates. */
429 cfm_compose_ccm(struct cfm *cfm, struct ofpbuf *packet,
430 uint8_t eth_src[ETH_ADDR_LEN])
435 timer_set_duration(&cfm->tx_timer, cfm->ccm_interval_ms);
436 eth_compose(packet, cfm_ccm_addr(cfm), eth_src, ETH_TYPE_CFM, sizeof *ccm);
438 ccm_vlan = (cfm->ccm_vlan != CFM_RANDOM_VLAN
441 ccm_vlan = ccm_vlan & VLAN_VID_MASK;
443 if (ccm_vlan || cfm->ccm_pcp) {
444 uint16_t tci = ccm_vlan | (cfm->ccm_pcp << VLAN_PCP_SHIFT);
445 eth_push_vlan(packet, htons(tci));
449 ccm->mdlevel_version = 0;
450 ccm->opcode = CCM_OPCODE;
451 ccm->tlv_offset = 70;
452 ccm->seq = htonl(++cfm->seq);
453 ccm->flags = cfm->ccm_interval;
454 memcpy(ccm->maid, cfm->maid, sizeof ccm->maid);
455 memset(ccm->zero, 0, sizeof ccm->zero);
459 ccm->mpid = htons(hash_mpid(cfm->mpid));
460 ccm->mpid64 = htonll(cfm->mpid);
461 ccm->opdown = !cfm->opup;
463 ccm->mpid = htons(cfm->mpid);
464 ccm->mpid64 = htonll(0);
468 if (cfm->ccm_interval == 0) {
469 assert(cfm->extended);
470 ccm->interval_ms_x = htons(cfm->ccm_interval_ms);
472 ccm->interval_ms_x = htons(0);
475 if (cfm->booted && hmap_is_empty(&cfm->remote_mps)) {
476 ccm->flags |= CCM_RDI_MASK;
480 long long int delay = time_msec() - cfm->last_tx;
481 if (delay > (cfm->ccm_interval_ms * 3 / 2)) {
482 VLOG_WARN("%s: long delay of %lldms (expected %dms) sending CCM"
483 " seq %"PRIu32, cfm->name, delay, cfm->ccm_interval_ms,
487 cfm->last_tx = time_msec();
491 cfm_wait(struct cfm *cfm)
493 timer_wait(&cfm->tx_timer);
494 timer_wait(&cfm->fault_timer);
497 /* Configures 'cfm' with settings from 's'. */
499 cfm_configure(struct cfm *cfm, const struct cfm_settings *s)
504 if (!cfm_is_valid_mpid(s->extended, s->mpid) || s->interval <= 0) {
509 cfm->check_tnl_key = s->check_tnl_key;
510 cfm->extended = s->extended;
512 interval = ms_to_ccm_interval(s->interval);
513 interval_ms = ccm_interval_to_ms(interval);
515 cfm->ccm_vlan = s->ccm_vlan;
516 cfm->ccm_pcp = s->ccm_pcp & (VLAN_PCP_MASK >> VLAN_PCP_SHIFT);
517 if (cfm->extended && interval_ms != s->interval) {
519 interval_ms = MIN(s->interval, UINT16_MAX);
522 if (interval != cfm->ccm_interval || interval_ms != cfm->ccm_interval_ms) {
523 cfm->ccm_interval = interval;
524 cfm->ccm_interval_ms = interval_ms;
526 timer_set_expired(&cfm->tx_timer);
527 timer_set_duration(&cfm->fault_timer, cfm_fault_interval(cfm));
533 /* Returns true if 'cfm' should process packets from 'flow'. */
535 cfm_should_process_flow(const struct cfm *cfm, const struct flow *flow)
537 return (ntohs(flow->dl_type) == ETH_TYPE_CFM
538 && eth_addr_equals(flow->dl_dst, cfm_ccm_addr(cfm))
539 && (!cfm->check_tnl_key || flow->tunnel.tun_id == htonll(0)));
542 /* Updates internal statistics relevant to packet 'p'. Should be called on
543 * every packet whose flow returned true when passed to
544 * cfm_should_process_flow. */
546 cfm_process_heartbeat(struct cfm *cfm, const struct ofpbuf *p)
549 struct eth_header *eth;
552 ccm = ofpbuf_at(p, (uint8_t *)p->l3 - (uint8_t *)p->data, CCM_ACCEPT_LEN);
555 VLOG_INFO_RL(&rl, "%s: Received an unparseable 802.1ag CCM heartbeat.",
560 if (ccm->opcode != CCM_OPCODE) {
561 VLOG_INFO_RL(&rl, "%s: Received an unsupported 802.1ag message. "
562 "(opcode %u)", cfm->name, ccm->opcode);
566 /* According to the 802.1ag specification, reception of a CCM with an
567 * incorrect ccm_interval, unexpected MAID, or unexpected MPID should
568 * trigger a fault. We ignore this requirement for several reasons.
570 * Faults can cause a controller or Open vSwitch to make potentially
571 * expensive changes to the network topology. It seems prudent to trigger
572 * them judiciously, especially when CFM is used to check slave status of
573 * bonds. Furthermore, faults can be maliciously triggered by crafting
574 * unexpected CCMs. */
575 if (memcmp(ccm->maid, cfm->maid, sizeof ccm->maid)) {
576 cfm->recv_fault |= CFM_FAULT_MAID;
577 VLOG_WARN_RL(&rl, "%s: Received unexpected remote MAID from MAC "
578 ETH_ADDR_FMT, cfm->name, ETH_ADDR_ARGS(eth->eth_src));
580 uint8_t ccm_interval = ccm->flags & 0x7;
581 bool ccm_rdi = ccm->flags & CCM_RDI_MASK;
582 uint16_t ccm_interval_ms_x = ntohs(ccm->interval_ms_x);
584 struct remote_mp *rmp;
588 enum cfm_fault_reason cfm_fault = 0;
591 ccm_mpid = ntohll(ccm->mpid64);
592 ccm_opdown = ccm->opdown;
594 ccm_mpid = ntohs(ccm->mpid);
597 ccm_seq = ntohl(ccm->seq);
599 if (ccm_interval != cfm->ccm_interval) {
600 cfm_fault |= CFM_FAULT_INTERVAL;
601 VLOG_WARN_RL(&rl, "%s: received a CCM with an unexpected interval"
602 " (%"PRIu8") from RMP %"PRIu64, cfm->name,
603 ccm_interval, ccm_mpid);
606 if (cfm->extended && ccm_interval == 0
607 && ccm_interval_ms_x != cfm->ccm_interval_ms) {
608 cfm_fault |= CFM_FAULT_INTERVAL;
609 VLOG_WARN_RL(&rl, "%s: received a CCM with an unexpected extended"
610 " interval (%"PRIu16"ms) from RMP %"PRIu64, cfm->name,
611 ccm_interval_ms_x, ccm_mpid);
614 rmp = lookup_remote_mp(cfm, ccm_mpid);
616 if (hmap_count(&cfm->remote_mps) < CFM_MAX_RMPS) {
617 rmp = xzalloc(sizeof *rmp);
618 hmap_insert(&cfm->remote_mps, &rmp->node, hash_mpid(ccm_mpid));
620 cfm_fault |= CFM_FAULT_OVERFLOW;
622 "%s: dropped CCM with MPID %"PRIu64" from MAC "
623 ETH_ADDR_FMT, cfm->name, ccm_mpid,
624 ETH_ADDR_ARGS(eth->eth_src));
629 cfm_fault |= CFM_FAULT_RDI;
630 VLOG_DBG("%s: RDI bit flagged from RMP %"PRIu64, cfm->name,
634 VLOG_DBG("%s: received CCM (seq %"PRIu32") (mpid %"PRIu64")"
635 " (interval %"PRIu8") (RDI %s)", cfm->name, ccm_seq,
636 ccm_mpid, ccm_interval, ccm_rdi ? "true" : "false");
639 if (rmp->mpid == cfm->mpid) {
640 cfm_fault |= CFM_FAULT_LOOPBACK;
641 VLOG_WARN_RL(&rl,"%s: received CCM with local MPID"
642 " %"PRIu64, cfm->name, rmp->mpid);
645 if (rmp->seq && ccm_seq != (rmp->seq + 1)) {
646 VLOG_WARN_RL(&rl, "%s: (mpid %"PRIu64") detected sequence"
647 " numbers which indicate possible connectivity"
648 " problems (previous %"PRIu32") (current %"PRIu32
649 ")", cfm->name, ccm_mpid, rmp->seq, ccm_seq);
652 rmp->mpid = ccm_mpid;
654 rmp->num_health_ccm++;
657 cfm->recv_fault |= cfm_fault;
659 rmp->opup = !ccm_opdown;
660 rmp->last_rx = time_msec();
665 /* Gets the fault status of 'cfm'. Returns a bit mask of 'cfm_fault_reason's
666 * indicating the cause of the connectivity fault, or zero if there is no
669 cfm_get_fault(const struct cfm *cfm)
671 if (cfm->fault_override >= 0) {
672 return cfm->fault_override ? CFM_FAULT_OVERRIDE : 0;
677 /* Gets the health of 'cfm'. Returns an integer between 0 and 100 indicating
678 * the health of the link as a percentage of ccm frames received in
679 * CFM_HEALTH_INTERVAL * 'fault_interval' if there is only 1 remote_mpid,
680 * returns 0 if there are no remote_mpids, and returns -1 if there are more
681 * than 1 remote_mpids. */
683 cfm_get_health(const struct cfm *cfm)
688 /* Gets the operational state of 'cfm'. 'cfm' is considered operationally down
689 * if it has received a CCM with the operationally down bit set from any of its
690 * remote maintenance points. Returns 1 if 'cfm' is operationally up, 0 if
691 * 'cfm' is operationally down, or -1 if 'cfm' has no operational state
692 * (because it isn't in extended mode). */
694 cfm_get_opup(const struct cfm *cfm)
697 return cfm->remote_opup;
703 /* Populates 'rmps' with an array of remote maintenance points reachable by
704 * 'cfm'. The number of remote maintenance points is written to 'n_rmps'.
705 * 'cfm' retains ownership of the array written to 'rmps' */
707 cfm_get_remote_mpids(const struct cfm *cfm, const uint64_t **rmps,
710 *rmps = cfm->rmps_array;
711 *n_rmps = cfm->rmps_array_len;
715 cfm_find(const char *name)
719 HMAP_FOR_EACH_WITH_HASH (cfm, hmap_node, hash_string(name, 0), &all_cfms) {
720 if (!strcmp(cfm->name, name)) {
728 cfm_print_details(struct ds *ds, const struct cfm *cfm)
730 struct remote_mp *rmp;
733 ds_put_format(ds, "---- %s ----\n", cfm->name);
734 ds_put_format(ds, "MPID %"PRIu64":%s%s\n", cfm->mpid,
735 cfm->extended ? " extended" : "",
736 cfm->fault_override >= 0 ? " fault_override" : "");
738 fault = cfm_get_fault(cfm);
740 ds_put_cstr(ds, "\tfault: ");
741 ds_put_cfm_fault(ds, fault);
742 ds_put_cstr(ds, "\n");
745 if (cfm->health == -1) {
746 ds_put_format(ds, "\taverage health: undefined\n");
748 ds_put_format(ds, "\taverage health: %d\n", cfm->health);
750 ds_put_format(ds, "\topstate: %s\n", cfm->opup ? "up" : "down");
751 ds_put_format(ds, "\tremote_opstate: %s\n",
752 cfm->remote_opup ? "up" : "down");
753 ds_put_format(ds, "\tinterval: %dms\n", cfm->ccm_interval_ms);
754 ds_put_format(ds, "\tnext CCM tx: %lldms\n",
755 timer_msecs_until_expired(&cfm->tx_timer));
756 ds_put_format(ds, "\tnext fault check: %lldms\n",
757 timer_msecs_until_expired(&cfm->fault_timer));
759 HMAP_FOR_EACH (rmp, node, &cfm->remote_mps) {
760 ds_put_format(ds, "Remote MPID %"PRIu64"\n", rmp->mpid);
761 ds_put_format(ds, "\trecv since check: %s\n",
762 rmp->recv ? "true" : "false");
763 ds_put_format(ds, "\topstate: %s\n", rmp->opup? "up" : "down");
768 cfm_unixctl_show(struct unixctl_conn *conn, int argc, const char *argv[],
769 void *aux OVS_UNUSED)
771 struct ds ds = DS_EMPTY_INITIALIZER;
772 const struct cfm *cfm;
775 cfm = cfm_find(argv[1]);
777 unixctl_command_reply_error(conn, "no such CFM object");
780 cfm_print_details(&ds, cfm);
782 HMAP_FOR_EACH (cfm, hmap_node, &all_cfms) {
783 cfm_print_details(&ds, cfm);
787 unixctl_command_reply(conn, ds_cstr(&ds));
792 cfm_unixctl_set_fault(struct unixctl_conn *conn, int argc, const char *argv[],
793 void *aux OVS_UNUSED)
795 const char *fault_str = argv[argc - 1];
799 if (!strcasecmp("true", fault_str)) {
801 } else if (!strcasecmp("false", fault_str)) {
803 } else if (!strcasecmp("normal", fault_str)) {
806 unixctl_command_reply_error(conn, "unknown fault string");
811 cfm = cfm_find(argv[1]);
813 unixctl_command_reply_error(conn, "no such CFM object");
816 cfm->fault_override = fault_override;
818 HMAP_FOR_EACH (cfm, hmap_node, &all_cfms) {
819 cfm->fault_override = fault_override;
823 unixctl_command_reply(conn, "OK");