]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Copyright (c) 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc. | |
3 | * | |
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: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
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. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | #include "cfm.h" | |
19 | ||
20 | #include <stdint.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | ||
24 | #include "byte-order.h" | |
25 | #include "connectivity.h" | |
26 | #include "dp-packet.h" | |
27 | #include "openvswitch/dynamic-string.h" | |
28 | #include "flow.h" | |
29 | #include "hash.h" | |
30 | #include "openvswitch/hmap.h" | |
31 | #include "netdev.h" | |
32 | #include "ovs-atomic.h" | |
33 | #include "packets.h" | |
34 | #include "openvswitch/poll-loop.h" | |
35 | #include "random.h" | |
36 | #include "seq.h" | |
37 | #include "timer.h" | |
38 | #include "timeval.h" | |
39 | #include "unixctl.h" | |
40 | #include "openvswitch/vlog.h" | |
41 | #include "util.h" | |
42 | ||
43 | VLOG_DEFINE_THIS_MODULE(cfm); | |
44 | ||
45 | #define CFM_MAX_RMPS 256 | |
46 | ||
47 | /* Ethernet destination address of CCM packets. */ | |
48 | static const struct eth_addr eth_addr_ccm = ETH_ADDR_C(01,80,c2,00,00,30); | |
49 | static const struct eth_addr eth_addr_ccm_x = ETH_ADDR_C(01,23,20,00,00,30); | |
50 | ||
51 | #define ETH_TYPE_CFM 0x8902 | |
52 | ||
53 | /* A 'ccm' represents a Continuity Check Message from the 802.1ag | |
54 | * specification. Continuity Check Messages are broadcast periodically so that | |
55 | * hosts can determine whom they have connectivity to. | |
56 | * | |
57 | * The minimum length of a CCM as specified by IEEE 802.1ag is 75 bytes. | |
58 | * Previous versions of Open vSwitch generated 74-byte CCM messages, so we | |
59 | * accept such messages too. */ | |
60 | #define CCM_LEN 75 | |
61 | #define CCM_ACCEPT_LEN 74 | |
62 | #define CCM_MAID_LEN 48 | |
63 | #define CCM_OPCODE 1 /* CFM message opcode meaning CCM. */ | |
64 | #define CCM_RDI_MASK 0x80 | |
65 | #define CFM_HEALTH_INTERVAL 6 | |
66 | ||
67 | OVS_PACKED( | |
68 | struct ccm { | |
69 | uint8_t mdlevel_version; /* MD Level and Version */ | |
70 | uint8_t opcode; | |
71 | uint8_t flags; | |
72 | uint8_t tlv_offset; | |
73 | ovs_be32 seq; | |
74 | ovs_be16 mpid; | |
75 | uint8_t maid[CCM_MAID_LEN]; | |
76 | ||
77 | /* Defined by ITU-T Y.1731 should be zero */ | |
78 | ovs_be16 interval_ms_x; /* Transmission interval in ms. */ | |
79 | ovs_be64 mpid64; /* MPID in extended mode. */ | |
80 | uint8_t opdown; /* Operationally down. */ | |
81 | uint8_t zero[5]; | |
82 | ||
83 | /* TLV space. */ | |
84 | uint8_t end_tlv; | |
85 | }); | |
86 | BUILD_ASSERT_DECL(CCM_LEN == sizeof(struct ccm)); | |
87 | ||
88 | struct cfm { | |
89 | const char *name; /* Name of this CFM object. */ | |
90 | struct hmap_node hmap_node; /* Node in all_cfms list. */ | |
91 | ||
92 | struct netdev *netdev; | |
93 | uint64_t rx_packets; /* Packets received by 'netdev'. */ | |
94 | ||
95 | uint64_t mpid; | |
96 | bool demand; /* Demand mode. */ | |
97 | bool booted; /* A full fault interval has occurred. */ | |
98 | enum cfm_fault_reason fault; /* Connectivity fault status. */ | |
99 | enum cfm_fault_reason recv_fault; /* Bit mask of faults occurring on | |
100 | receive. */ | |
101 | bool opup; /* Operational State. */ | |
102 | bool remote_opup; /* Remote Operational State. */ | |
103 | ||
104 | int fault_override; /* Manual override of 'fault' status. | |
105 | Ignored if negative. */ | |
106 | ||
107 | uint32_t seq; /* The sequence number of our last CCM. */ | |
108 | uint8_t ccm_interval; /* The CCM transmission interval. */ | |
109 | int ccm_interval_ms; /* 'ccm_interval' in milliseconds. */ | |
110 | uint16_t ccm_vlan; /* Vlan tag of CCM PDUs. CFM_RANDOM_VLAN if | |
111 | random. */ | |
112 | uint8_t ccm_pcp; /* Priority of CCM PDUs. */ | |
113 | uint8_t maid[CCM_MAID_LEN]; /* The MAID of this CFM. */ | |
114 | ||
115 | struct timer tx_timer; /* Send CCM when expired. */ | |
116 | struct timer fault_timer; /* Check for faults when expired. */ | |
117 | ||
118 | struct hmap remote_mps; /* Remote MPs. */ | |
119 | ||
120 | /* Result of cfm_get_remote_mpids(). Updated only during fault check to | |
121 | * avoid flapping. */ | |
122 | uint64_t *rmps_array; /* Cache of remote_mps. */ | |
123 | size_t rmps_array_len; /* Number of rmps in 'rmps_array'. */ | |
124 | ||
125 | int health; /* Percentage of the number of CCM frames | |
126 | received. */ | |
127 | int health_interval; /* Number of fault_intervals since health was | |
128 | recomputed. */ | |
129 | long long int last_tx; /* Last CCM transmission time. */ | |
130 | ||
131 | /* These bools are atomic to allow readers to check their values | |
132 | * without taking 'mutex'. Such readers do not assume the values they | |
133 | * read are synchronized with any other members. */ | |
134 | atomic_bool check_tnl_key; /* Verify the tunnel key of inbound packets? */ | |
135 | atomic_bool extended; /* Extended mode. */ | |
136 | struct ovs_refcount ref_cnt; | |
137 | ||
138 | uint64_t flap_count; /* Count the flaps since boot. */ | |
139 | ||
140 | /* True when the variables returned by cfm_get_*() are changed | |
141 | * since last check. */ | |
142 | bool status_changed; | |
143 | ||
144 | /* When 'cfm->demand' is set, at least one ccm is required to be received | |
145 | * every 100 * cfm_interval. If ccm is not received within this interval, | |
146 | * even if data packets are received, the cfm fault will be set. */ | |
147 | struct timer demand_rx_ccm_t; | |
148 | }; | |
149 | ||
150 | /* Remote MPs represent foreign network entities that are configured to have | |
151 | * the same MAID as this CFM instance. */ | |
152 | struct remote_mp { | |
153 | uint64_t mpid; /* The Maintenance Point ID of this 'remote_mp'. */ | |
154 | struct hmap_node node; /* Node in 'remote_mps' map. */ | |
155 | ||
156 | bool recv; /* CCM was received since last fault check. */ | |
157 | bool opup; /* Operational State. */ | |
158 | uint32_t seq; /* Most recently received sequence number. */ | |
159 | uint8_t num_health_ccm; /* Number of received ccm frames every | |
160 | CFM_HEALTH_INTERVAL * 'fault_interval'. */ | |
161 | long long int last_rx; /* Last CCM reception time. */ | |
162 | ||
163 | }; | |
164 | ||
165 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(20, 30); | |
166 | ||
167 | static struct ovs_mutex mutex = OVS_MUTEX_INITIALIZER; | |
168 | static struct hmap all_cfms__ = HMAP_INITIALIZER(&all_cfms__); | |
169 | static struct hmap *const all_cfms OVS_GUARDED_BY(mutex) = &all_cfms__; | |
170 | ||
171 | static unixctl_cb_func cfm_unixctl_show; | |
172 | static unixctl_cb_func cfm_unixctl_set_fault; | |
173 | ||
174 | static uint64_t | |
175 | cfm_rx_packets(const struct cfm *cfm) OVS_REQUIRES(mutex) | |
176 | { | |
177 | struct netdev_stats stats; | |
178 | ||
179 | if (!netdev_get_stats(cfm->netdev, &stats)) { | |
180 | return stats.rx_packets; | |
181 | } else { | |
182 | return 0; | |
183 | } | |
184 | } | |
185 | ||
186 | static struct eth_addr | |
187 | cfm_ccm_addr(struct cfm *cfm) | |
188 | { | |
189 | bool extended; | |
190 | ||
191 | atomic_read_relaxed(&cfm->extended, &extended); | |
192 | ||
193 | return extended ? eth_addr_ccm_x : eth_addr_ccm; | |
194 | } | |
195 | ||
196 | /* Returns the string representation of the given cfm_fault_reason 'reason'. */ | |
197 | const char * | |
198 | cfm_fault_reason_to_str(int reason) | |
199 | { | |
200 | switch (reason) { | |
201 | #define CFM_FAULT_REASON(NAME, STR) case CFM_FAULT_##NAME: return #STR; | |
202 | CFM_FAULT_REASONS | |
203 | #undef CFM_FAULT_REASON | |
204 | default: return "<unknown>"; | |
205 | } | |
206 | } | |
207 | ||
208 | static void | |
209 | ds_put_cfm_fault(struct ds *ds, int fault) | |
210 | { | |
211 | int i; | |
212 | ||
213 | for (i = 0; i < CFM_FAULT_N_REASONS; i++) { | |
214 | int reason = 1 << i; | |
215 | ||
216 | if (fault & reason) { | |
217 | ds_put_format(ds, "%s ", cfm_fault_reason_to_str(reason)); | |
218 | } | |
219 | } | |
220 | ||
221 | ds_chomp(ds, ' '); | |
222 | } | |
223 | ||
224 | static void | |
225 | cfm_generate_maid(struct cfm *cfm) OVS_REQUIRES(mutex) | |
226 | { | |
227 | const char *ovs_md_name = "ovs"; | |
228 | const char *ovs_ma_name = "ovs"; | |
229 | uint8_t *ma_p; | |
230 | size_t md_len, ma_len; | |
231 | ||
232 | memset(cfm->maid, 0, CCM_MAID_LEN); | |
233 | ||
234 | md_len = strlen(ovs_md_name); | |
235 | ma_len = strlen(ovs_ma_name); | |
236 | ||
237 | ovs_assert(md_len && ma_len && md_len + ma_len + 4 <= CCM_MAID_LEN); | |
238 | ||
239 | cfm->maid[0] = 4; /* MD name string format. */ | |
240 | cfm->maid[1] = md_len; /* MD name size. */ | |
241 | memcpy(&cfm->maid[2], ovs_md_name, md_len); /* MD name. */ | |
242 | ||
243 | ma_p = cfm->maid + 2 + md_len; | |
244 | ma_p[0] = 2; /* MA name string format. */ | |
245 | ma_p[1] = ma_len; /* MA name size. */ | |
246 | memcpy(&ma_p[2], ovs_ma_name, ma_len); /* MA name. */ | |
247 | } | |
248 | ||
249 | static int | |
250 | ccm_interval_to_ms(uint8_t interval) | |
251 | { | |
252 | switch (interval) { | |
253 | case 0: OVS_NOT_REACHED(); /* Explicitly not supported by 802.1ag. */ | |
254 | case 1: return 3; /* Not recommended due to timer resolution. */ | |
255 | case 2: return 10; /* Not recommended due to timer resolution. */ | |
256 | case 3: return 100; | |
257 | case 4: return 1000; | |
258 | case 5: return 10000; | |
259 | case 6: return 60000; | |
260 | case 7: return 600000; | |
261 | default: OVS_NOT_REACHED(); /* Explicitly not supported by 802.1ag. */ | |
262 | } | |
263 | ||
264 | OVS_NOT_REACHED(); | |
265 | } | |
266 | ||
267 | static long long int | |
268 | cfm_fault_interval(struct cfm *cfm) OVS_REQUIRES(mutex) | |
269 | { | |
270 | /* According to the 802.1ag specification we should assume every other MP | |
271 | * with the same MAID has the same transmission interval that we have. If | |
272 | * an MP has a different interval, cfm_process_heartbeat will register it | |
273 | * as a fault (likely due to a configuration error). Thus we can check all | |
274 | * MPs at once making this quite a bit simpler. | |
275 | * | |
276 | * When cfm is not in demand mode, we check when (ccm_interval_ms * 3.5) ms | |
277 | * have passed. When cfm is in demand mode, we check when | |
278 | * (MAX(ccm_interval_ms, 500) * 3.5) ms have passed. This ensures that | |
279 | * ovs-vswitchd has enough time to pull statistics from the datapath. */ | |
280 | ||
281 | return (MAX(cfm->ccm_interval_ms, cfm->demand ? 500 : cfm->ccm_interval_ms) | |
282 | * 7) / 2; | |
283 | } | |
284 | ||
285 | static uint8_t | |
286 | ms_to_ccm_interval(int interval_ms) | |
287 | { | |
288 | uint8_t i; | |
289 | ||
290 | for (i = 7; i > 0; i--) { | |
291 | if (ccm_interval_to_ms(i) <= interval_ms) { | |
292 | return i; | |
293 | } | |
294 | } | |
295 | ||
296 | return 1; | |
297 | } | |
298 | ||
299 | static uint32_t | |
300 | hash_mpid(uint64_t mpid) | |
301 | { | |
302 | return hash_uint64(mpid); | |
303 | } | |
304 | ||
305 | static bool | |
306 | cfm_is_valid_mpid(bool extended, uint64_t mpid) | |
307 | { | |
308 | /* 802.1ag specification requires MPIDs to be within the range [1, 8191]. | |
309 | * In extended mode we relax this requirement. */ | |
310 | return mpid >= 1 && (extended || mpid <= 8191); | |
311 | } | |
312 | ||
313 | static struct remote_mp * | |
314 | lookup_remote_mp(const struct cfm *cfm, uint64_t mpid) OVS_REQUIRES(mutex) | |
315 | { | |
316 | struct remote_mp *rmp; | |
317 | ||
318 | HMAP_FOR_EACH_IN_BUCKET (rmp, node, hash_mpid(mpid), &cfm->remote_mps) { | |
319 | if (rmp->mpid == mpid) { | |
320 | return rmp; | |
321 | } | |
322 | } | |
323 | ||
324 | return NULL; | |
325 | } | |
326 | ||
327 | void | |
328 | cfm_init(void) | |
329 | { | |
330 | unixctl_command_register("cfm/show", "[interface]", 0, 1, cfm_unixctl_show, | |
331 | NULL); | |
332 | unixctl_command_register("cfm/set-fault", "[interface] normal|false|true", | |
333 | 1, 2, cfm_unixctl_set_fault, NULL); | |
334 | } | |
335 | ||
336 | /* Records the status change and changes the global connectivity seq. */ | |
337 | static void | |
338 | cfm_status_changed(struct cfm *cfm) OVS_REQUIRES(mutex) | |
339 | { | |
340 | seq_change(connectivity_seq_get()); | |
341 | cfm->status_changed = true; | |
342 | } | |
343 | ||
344 | /* Allocates a 'cfm' object called 'name'. 'cfm' should be initialized by | |
345 | * cfm_configure() before use. */ | |
346 | struct cfm * | |
347 | cfm_create(const struct netdev *netdev) OVS_EXCLUDED(mutex) | |
348 | { | |
349 | struct cfm *cfm; | |
350 | ||
351 | cfm = xzalloc(sizeof *cfm); | |
352 | cfm->netdev = netdev_ref(netdev); | |
353 | cfm->name = netdev_get_name(cfm->netdev); | |
354 | hmap_init(&cfm->remote_mps); | |
355 | cfm->remote_opup = true; | |
356 | cfm->fault_override = -1; | |
357 | cfm->health = -1; | |
358 | cfm->last_tx = 0; | |
359 | cfm->flap_count = 0; | |
360 | atomic_init(&cfm->extended, false); | |
361 | atomic_init(&cfm->check_tnl_key, false); | |
362 | ovs_refcount_init(&cfm->ref_cnt); | |
363 | ||
364 | ovs_mutex_lock(&mutex); | |
365 | cfm_status_changed(cfm); | |
366 | cfm_generate_maid(cfm); | |
367 | hmap_insert(all_cfms, &cfm->hmap_node, hash_string(cfm->name, 0)); | |
368 | ovs_mutex_unlock(&mutex); | |
369 | ||
370 | return cfm; | |
371 | } | |
372 | ||
373 | void | |
374 | cfm_unref(struct cfm *cfm) OVS_EXCLUDED(mutex) | |
375 | { | |
376 | struct remote_mp *rmp; | |
377 | ||
378 | if (!cfm) { | |
379 | return; | |
380 | } | |
381 | ||
382 | if (ovs_refcount_unref_relaxed(&cfm->ref_cnt) != 1) { | |
383 | return; | |
384 | } | |
385 | ||
386 | ovs_mutex_lock(&mutex); | |
387 | cfm_status_changed(cfm); | |
388 | hmap_remove(all_cfms, &cfm->hmap_node); | |
389 | ovs_mutex_unlock(&mutex); | |
390 | ||
391 | HMAP_FOR_EACH_POP (rmp, node, &cfm->remote_mps) { | |
392 | free(rmp); | |
393 | } | |
394 | ||
395 | hmap_destroy(&cfm->remote_mps); | |
396 | netdev_close(cfm->netdev); | |
397 | free(cfm->rmps_array); | |
398 | ||
399 | free(cfm); | |
400 | } | |
401 | ||
402 | struct cfm * | |
403 | cfm_ref(const struct cfm *cfm_) | |
404 | { | |
405 | struct cfm *cfm = CONST_CAST(struct cfm *, cfm_); | |
406 | if (cfm) { | |
407 | ovs_refcount_ref(&cfm->ref_cnt); | |
408 | } | |
409 | return cfm; | |
410 | } | |
411 | ||
412 | /* Should be run periodically to update fault statistics messages. */ | |
413 | void | |
414 | cfm_run(struct cfm *cfm) OVS_EXCLUDED(mutex) | |
415 | { | |
416 | ovs_mutex_lock(&mutex); | |
417 | if (timer_expired(&cfm->fault_timer)) { | |
418 | long long int interval = cfm_fault_interval(cfm); | |
419 | struct remote_mp *rmp, *rmp_next; | |
420 | enum cfm_fault_reason old_cfm_fault = cfm->fault; | |
421 | uint64_t old_flap_count = cfm->flap_count; | |
422 | int old_health = cfm->health; | |
423 | size_t old_rmps_array_len = cfm->rmps_array_len; | |
424 | bool old_rmps_deleted = false; | |
425 | bool old_rmp_opup = cfm->remote_opup; | |
426 | bool demand_override; | |
427 | bool rmp_set_opup = false; | |
428 | bool rmp_set_opdown = false; | |
429 | ||
430 | cfm->fault = cfm->recv_fault; | |
431 | cfm->recv_fault = 0; | |
432 | ||
433 | cfm->rmps_array_len = 0; | |
434 | free(cfm->rmps_array); | |
435 | cfm->rmps_array = xmalloc(hmap_count(&cfm->remote_mps) * | |
436 | sizeof *cfm->rmps_array); | |
437 | ||
438 | if (cfm->health_interval == CFM_HEALTH_INTERVAL) { | |
439 | /* Calculate the cfm health of the interface. If the number of | |
440 | * remote_mpids of a cfm interface is > 1, the cfm health is | |
441 | * undefined. If the number of remote_mpids is 1, the cfm health is | |
442 | * the percentage of the ccm frames received in the | |
443 | * (CFM_HEALTH_INTERVAL * 3.5)ms, else it is 0. */ | |
444 | if (hmap_count(&cfm->remote_mps) > 1) { | |
445 | cfm->health = -1; | |
446 | } else if (hmap_is_empty(&cfm->remote_mps)) { | |
447 | cfm->health = 0; | |
448 | } else { | |
449 | int exp_ccm_recvd; | |
450 | ||
451 | rmp = CONTAINER_OF(hmap_first(&cfm->remote_mps), | |
452 | struct remote_mp, node); | |
453 | exp_ccm_recvd = (CFM_HEALTH_INTERVAL * 7) / 2; | |
454 | /* Calculate the percentage of healthy ccm frames received. | |
455 | * Since the 'fault_interval' is (3.5 * cfm_interval), and | |
456 | * 1 CCM packet must be received every cfm_interval, | |
457 | * the 'remote_mpid' health reports the percentage of | |
458 | * healthy CCM frames received every | |
459 | * 'CFM_HEALTH_INTERVAL'th 'fault_interval'. */ | |
460 | cfm->health = (rmp->num_health_ccm * 100) / exp_ccm_recvd; | |
461 | cfm->health = MIN(cfm->health, 100); | |
462 | rmp->num_health_ccm = 0; | |
463 | ovs_assert(cfm->health >= 0 && cfm->health <= 100); | |
464 | } | |
465 | cfm->health_interval = 0; | |
466 | } | |
467 | cfm->health_interval++; | |
468 | ||
469 | demand_override = false; | |
470 | if (cfm->demand) { | |
471 | uint64_t rx_packets = cfm_rx_packets(cfm); | |
472 | demand_override = hmap_count(&cfm->remote_mps) == 1 | |
473 | && rx_packets > cfm->rx_packets | |
474 | && !timer_expired(&cfm->demand_rx_ccm_t); | |
475 | cfm->rx_packets = rx_packets; | |
476 | } | |
477 | ||
478 | HMAP_FOR_EACH_SAFE (rmp, rmp_next, node, &cfm->remote_mps) { | |
479 | if (!rmp->recv) { | |
480 | VLOG_INFO("%s: Received no CCM from RMP %"PRIu64" in the last" | |
481 | " %lldms", cfm->name, rmp->mpid, | |
482 | time_msec() - rmp->last_rx); | |
483 | if (!demand_override) { | |
484 | old_rmps_deleted = true; | |
485 | hmap_remove(&cfm->remote_mps, &rmp->node); | |
486 | free(rmp); | |
487 | } | |
488 | } else { | |
489 | rmp->recv = false; | |
490 | ||
491 | if (rmp->opup) { | |
492 | rmp_set_opup = true; | |
493 | } else { | |
494 | rmp_set_opdown = true; | |
495 | } | |
496 | ||
497 | cfm->rmps_array[cfm->rmps_array_len++] = rmp->mpid; | |
498 | } | |
499 | } | |
500 | ||
501 | if (rmp_set_opdown) { | |
502 | cfm->remote_opup = false; | |
503 | } | |
504 | else if (rmp_set_opup) { | |
505 | cfm->remote_opup = true; | |
506 | } | |
507 | ||
508 | if (hmap_is_empty(&cfm->remote_mps)) { | |
509 | cfm->fault |= CFM_FAULT_RECV; | |
510 | } | |
511 | ||
512 | if (old_cfm_fault != cfm->fault) { | |
513 | if (!VLOG_DROP_INFO(&rl)) { | |
514 | struct ds ds = DS_EMPTY_INITIALIZER; | |
515 | ||
516 | ds_put_cstr(&ds, "from ["); | |
517 | ds_put_cfm_fault(&ds, old_cfm_fault); | |
518 | ds_put_cstr(&ds, "] to ["); | |
519 | ds_put_cfm_fault(&ds, cfm->fault); | |
520 | ds_put_char(&ds, ']'); | |
521 | VLOG_INFO("%s: CFM faults changed %s.", cfm->name, ds_cstr(&ds)); | |
522 | ds_destroy(&ds); | |
523 | } | |
524 | ||
525 | /* If there is a flap, increments the counter. */ | |
526 | if (old_cfm_fault == 0 || cfm->fault == 0) { | |
527 | cfm->flap_count++; | |
528 | } | |
529 | } | |
530 | ||
531 | /* These variables represent the cfm session status, it is desirable | |
532 | * to update them to database immediately after change. */ | |
533 | if (old_health != cfm->health | |
534 | || old_rmp_opup != cfm->remote_opup | |
535 | || (old_rmps_array_len != cfm->rmps_array_len || old_rmps_deleted) | |
536 | || old_cfm_fault != cfm->fault | |
537 | || old_flap_count != cfm->flap_count) { | |
538 | cfm_status_changed(cfm); | |
539 | } | |
540 | ||
541 | cfm->booted = true; | |
542 | timer_set_duration(&cfm->fault_timer, interval); | |
543 | VLOG_DBG("%s: new fault interval", cfm->name); | |
544 | } | |
545 | ovs_mutex_unlock(&mutex); | |
546 | } | |
547 | ||
548 | /* Should be run periodically to check if the CFM module has a CCM message it | |
549 | * wishes to send. */ | |
550 | bool | |
551 | cfm_should_send_ccm(struct cfm *cfm) OVS_EXCLUDED(mutex) | |
552 | { | |
553 | bool ret; | |
554 | ||
555 | ovs_mutex_lock(&mutex); | |
556 | ret = timer_expired(&cfm->tx_timer); | |
557 | ovs_mutex_unlock(&mutex); | |
558 | return ret; | |
559 | } | |
560 | ||
561 | /* Composes a CCM message into 'packet'. Messages generated with this function | |
562 | * should be sent whenever cfm_should_send_ccm() indicates. */ | |
563 | void | |
564 | cfm_compose_ccm(struct cfm *cfm, struct dp_packet *packet, | |
565 | const struct eth_addr eth_src) OVS_EXCLUDED(mutex) | |
566 | { | |
567 | uint16_t ccm_vlan; | |
568 | struct ccm *ccm; | |
569 | bool extended; | |
570 | ||
571 | ovs_mutex_lock(&mutex); | |
572 | timer_set_duration(&cfm->tx_timer, cfm->ccm_interval_ms); | |
573 | eth_compose(packet, cfm_ccm_addr(cfm), eth_src, ETH_TYPE_CFM, sizeof *ccm); | |
574 | ||
575 | ccm_vlan = (cfm->ccm_vlan != CFM_RANDOM_VLAN | |
576 | ? cfm->ccm_vlan | |
577 | : random_uint16()); | |
578 | ccm_vlan = ccm_vlan & VLAN_VID_MASK; | |
579 | ||
580 | if (ccm_vlan || cfm->ccm_pcp) { | |
581 | uint16_t tci = ccm_vlan | (cfm->ccm_pcp << VLAN_PCP_SHIFT); | |
582 | eth_push_vlan(packet, htons(ETH_TYPE_VLAN), htons(tci)); | |
583 | } | |
584 | ||
585 | atomic_read_relaxed(&cfm->extended, &extended); | |
586 | ||
587 | ccm = dp_packet_l3(packet); | |
588 | ccm->mdlevel_version = 0; | |
589 | ccm->opcode = CCM_OPCODE; | |
590 | ccm->tlv_offset = 70; | |
591 | ccm->seq = htonl(++cfm->seq); | |
592 | ccm->flags = cfm->ccm_interval; | |
593 | memcpy(ccm->maid, cfm->maid, sizeof ccm->maid); | |
594 | memset(ccm->zero, 0, sizeof ccm->zero); | |
595 | ccm->end_tlv = 0; | |
596 | ||
597 | if (extended) { | |
598 | ccm->mpid = htons(hash_mpid(cfm->mpid)); | |
599 | ccm->mpid64 = htonll(cfm->mpid); | |
600 | ccm->opdown = !cfm->opup; | |
601 | } else { | |
602 | ccm->mpid = htons(cfm->mpid); | |
603 | ccm->mpid64 = htonll(0); | |
604 | ccm->opdown = 0; | |
605 | } | |
606 | ||
607 | if (cfm->ccm_interval == 0) { | |
608 | ovs_assert(extended); | |
609 | ccm->interval_ms_x = htons(cfm->ccm_interval_ms); | |
610 | } else { | |
611 | ccm->interval_ms_x = htons(0); | |
612 | } | |
613 | ||
614 | if (cfm->booted && hmap_is_empty(&cfm->remote_mps)) { | |
615 | ccm->flags |= CCM_RDI_MASK; | |
616 | } | |
617 | ||
618 | if (cfm->last_tx) { | |
619 | long long int delay = time_msec() - cfm->last_tx; | |
620 | if (delay > (cfm->ccm_interval_ms * 3 / 2)) { | |
621 | VLOG_INFO("%s: long delay of %lldms (expected %dms) sending CCM" | |
622 | " seq %"PRIu32, cfm->name, delay, cfm->ccm_interval_ms, | |
623 | cfm->seq); | |
624 | } | |
625 | } | |
626 | cfm->last_tx = time_msec(); | |
627 | ovs_mutex_unlock(&mutex); | |
628 | } | |
629 | ||
630 | long long int | |
631 | cfm_wait(struct cfm *cfm) OVS_EXCLUDED(mutex) | |
632 | { | |
633 | long long int wake_time = cfm_wake_time(cfm); | |
634 | poll_timer_wait_until(wake_time); | |
635 | return wake_time; | |
636 | } | |
637 | ||
638 | ||
639 | /* Returns the next cfm wakeup time. */ | |
640 | long long int | |
641 | cfm_wake_time(struct cfm *cfm) OVS_EXCLUDED(mutex) | |
642 | { | |
643 | long long int retval; | |
644 | ||
645 | if (!cfm) { | |
646 | return LLONG_MAX; | |
647 | } | |
648 | ||
649 | ovs_mutex_lock(&mutex); | |
650 | retval = MIN(cfm->tx_timer.t, cfm->fault_timer.t); | |
651 | ovs_mutex_unlock(&mutex); | |
652 | return retval; | |
653 | } | |
654 | ||
655 | ||
656 | /* Configures 'cfm' with settings from 's'. */ | |
657 | bool | |
658 | cfm_configure(struct cfm *cfm, const struct cfm_settings *s) | |
659 | OVS_EXCLUDED(mutex) | |
660 | { | |
661 | uint8_t interval; | |
662 | int interval_ms; | |
663 | ||
664 | if (!cfm_is_valid_mpid(s->extended, s->mpid) || s->interval <= 0) { | |
665 | return false; | |
666 | } | |
667 | ||
668 | ovs_mutex_lock(&mutex); | |
669 | cfm->mpid = s->mpid; | |
670 | cfm->opup = s->opup; | |
671 | interval = ms_to_ccm_interval(s->interval); | |
672 | interval_ms = ccm_interval_to_ms(interval); | |
673 | ||
674 | atomic_store_relaxed(&cfm->check_tnl_key, s->check_tnl_key); | |
675 | atomic_store_relaxed(&cfm->extended, s->extended); | |
676 | ||
677 | cfm->ccm_vlan = s->ccm_vlan; | |
678 | cfm->ccm_pcp = s->ccm_pcp & (VLAN_PCP_MASK >> VLAN_PCP_SHIFT); | |
679 | if (s->extended && interval_ms != s->interval) { | |
680 | interval = 0; | |
681 | interval_ms = MIN(s->interval, UINT16_MAX); | |
682 | } | |
683 | ||
684 | if (s->extended && s->demand) { | |
685 | if (!cfm->demand) { | |
686 | cfm->demand = true; | |
687 | cfm->rx_packets = cfm_rx_packets(cfm); | |
688 | } | |
689 | } else { | |
690 | cfm->demand = false; | |
691 | } | |
692 | ||
693 | if (interval != cfm->ccm_interval || interval_ms != cfm->ccm_interval_ms) { | |
694 | cfm->ccm_interval = interval; | |
695 | cfm->ccm_interval_ms = interval_ms; | |
696 | ||
697 | timer_set_expired(&cfm->tx_timer); | |
698 | timer_set_duration(&cfm->fault_timer, cfm_fault_interval(cfm)); | |
699 | } | |
700 | ||
701 | ovs_mutex_unlock(&mutex); | |
702 | return true; | |
703 | } | |
704 | ||
705 | /* Must be called when the netdev owned by 'cfm' should change. */ | |
706 | void | |
707 | cfm_set_netdev(struct cfm *cfm, const struct netdev *netdev) | |
708 | OVS_EXCLUDED(mutex) | |
709 | { | |
710 | ovs_mutex_lock(&mutex); | |
711 | if (cfm->netdev != netdev) { | |
712 | netdev_close(cfm->netdev); | |
713 | cfm->netdev = netdev_ref(netdev); | |
714 | } | |
715 | ovs_mutex_unlock(&mutex); | |
716 | } | |
717 | ||
718 | /* Returns true if 'cfm' should process packets from 'flow'. Sets | |
719 | * fields in 'wc' that were used to make the determination. */ | |
720 | bool | |
721 | cfm_should_process_flow(const struct cfm *cfm_, const struct flow *flow, | |
722 | struct flow_wildcards *wc) | |
723 | { | |
724 | struct cfm *cfm = CONST_CAST(struct cfm *, cfm_); | |
725 | bool check_tnl_key; | |
726 | ||
727 | /* Most packets are not CFM. */ | |
728 | if (OVS_LIKELY(flow->dl_type != htons(ETH_TYPE_CFM))) { | |
729 | return false; | |
730 | } | |
731 | ||
732 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); | |
733 | if (OVS_UNLIKELY(!eth_addr_equals(flow->dl_dst, cfm_ccm_addr(cfm)))) { | |
734 | return false; | |
735 | } | |
736 | ||
737 | atomic_read_relaxed(&cfm->check_tnl_key, &check_tnl_key); | |
738 | ||
739 | if (check_tnl_key) { | |
740 | memset(&wc->masks.tunnel.tun_id, 0xff, sizeof wc->masks.tunnel.tun_id); | |
741 | return flow->tunnel.tun_id == htonll(0); | |
742 | } | |
743 | return true; | |
744 | } | |
745 | ||
746 | /* Updates internal statistics relevant to packet 'p'. Should be called on | |
747 | * every packet whose flow returned true when passed to | |
748 | * cfm_should_process_flow. */ | |
749 | void | |
750 | cfm_process_heartbeat(struct cfm *cfm, const struct dp_packet *p) | |
751 | OVS_EXCLUDED(mutex) | |
752 | { | |
753 | struct ccm *ccm; | |
754 | struct eth_header *eth; | |
755 | bool extended; | |
756 | ||
757 | ovs_mutex_lock(&mutex); | |
758 | ||
759 | atomic_read_relaxed(&cfm->extended, &extended); | |
760 | ||
761 | eth = dp_packet_eth(p); | |
762 | ccm = dp_packet_at(p, (uint8_t *)dp_packet_l3(p) - (uint8_t *)dp_packet_data(p), | |
763 | CCM_ACCEPT_LEN); | |
764 | ||
765 | if (!ccm) { | |
766 | VLOG_INFO_RL(&rl, "%s: Received an unparseable 802.1ag CCM heartbeat.", | |
767 | cfm->name); | |
768 | goto out; | |
769 | } | |
770 | ||
771 | if (ccm->opcode != CCM_OPCODE) { | |
772 | VLOG_INFO_RL(&rl, "%s: Received an unsupported 802.1ag message. " | |
773 | "(opcode %u)", cfm->name, ccm->opcode); | |
774 | goto out; | |
775 | } | |
776 | ||
777 | /* According to the 802.1ag specification, reception of a CCM with an | |
778 | * incorrect ccm_interval, unexpected MAID, or unexpected MPID should | |
779 | * trigger a fault. We ignore this requirement for several reasons. | |
780 | * | |
781 | * Faults can cause a controller or Open vSwitch to make potentially | |
782 | * expensive changes to the network topology. It seems prudent to trigger | |
783 | * them judiciously, especially when CFM is used to check slave status of | |
784 | * bonds. Furthermore, faults can be maliciously triggered by crafting | |
785 | * unexpected CCMs. */ | |
786 | if (memcmp(ccm->maid, cfm->maid, sizeof ccm->maid)) { | |
787 | cfm->recv_fault |= CFM_FAULT_MAID; | |
788 | VLOG_WARN_RL(&rl, "%s: Received unexpected remote MAID from MAC " | |
789 | ETH_ADDR_FMT, cfm->name, ETH_ADDR_ARGS(eth->eth_src)); | |
790 | } else { | |
791 | uint8_t ccm_interval = ccm->flags & 0x7; | |
792 | bool ccm_rdi = ccm->flags & CCM_RDI_MASK; | |
793 | uint16_t ccm_interval_ms_x = ntohs(ccm->interval_ms_x); | |
794 | ||
795 | struct remote_mp *rmp; | |
796 | uint64_t ccm_mpid; | |
797 | uint32_t ccm_seq; | |
798 | bool ccm_opdown; | |
799 | enum cfm_fault_reason cfm_fault = 0; | |
800 | ||
801 | if (extended) { | |
802 | ccm_mpid = ntohll(ccm->mpid64); | |
803 | ccm_opdown = ccm->opdown; | |
804 | } else { | |
805 | ccm_mpid = ntohs(ccm->mpid); | |
806 | ccm_opdown = false; | |
807 | } | |
808 | ccm_seq = ntohl(ccm->seq); | |
809 | ||
810 | if (ccm_interval != cfm->ccm_interval) { | |
811 | VLOG_WARN_RL(&rl, "%s: received a CCM with an unexpected interval" | |
812 | " (%"PRIu8") from RMP %"PRIu64, cfm->name, | |
813 | ccm_interval, ccm_mpid); | |
814 | } | |
815 | ||
816 | if (extended && ccm_interval == 0 | |
817 | && ccm_interval_ms_x != cfm->ccm_interval_ms) { | |
818 | VLOG_WARN_RL(&rl, "%s: received a CCM with an unexpected extended" | |
819 | " interval (%"PRIu16"ms) from RMP %"PRIu64, cfm->name, | |
820 | ccm_interval_ms_x, ccm_mpid); | |
821 | } | |
822 | ||
823 | rmp = lookup_remote_mp(cfm, ccm_mpid); | |
824 | if (!rmp) { | |
825 | if (hmap_count(&cfm->remote_mps) < CFM_MAX_RMPS) { | |
826 | rmp = xzalloc(sizeof *rmp); | |
827 | hmap_insert(&cfm->remote_mps, &rmp->node, hash_mpid(ccm_mpid)); | |
828 | } else { | |
829 | cfm_fault |= CFM_FAULT_OVERFLOW; | |
830 | VLOG_WARN_RL(&rl, | |
831 | "%s: dropped CCM with MPID %"PRIu64" from MAC " | |
832 | ETH_ADDR_FMT, cfm->name, ccm_mpid, | |
833 | ETH_ADDR_ARGS(eth->eth_src)); | |
834 | } | |
835 | } | |
836 | ||
837 | if (ccm_rdi) { | |
838 | cfm_fault |= CFM_FAULT_RDI; | |
839 | VLOG_DBG("%s: RDI bit flagged from RMP %"PRIu64, cfm->name, | |
840 | ccm_mpid); | |
841 | } | |
842 | ||
843 | VLOG_DBG("%s: received CCM (seq %"PRIu32") (mpid %"PRIu64")" | |
844 | " (interval %"PRIu8") (RDI %s)", cfm->name, ccm_seq, | |
845 | ccm_mpid, ccm_interval, ccm_rdi ? "true" : "false"); | |
846 | ||
847 | if (rmp) { | |
848 | if (rmp->mpid == cfm->mpid) { | |
849 | cfm_fault |= CFM_FAULT_LOOPBACK; | |
850 | VLOG_WARN_RL(&rl,"%s: received CCM with local MPID" | |
851 | " %"PRIu64, cfm->name, rmp->mpid); | |
852 | } | |
853 | ||
854 | if (rmp->seq && ccm_seq != (rmp->seq + 1)) { | |
855 | VLOG_WARN_RL(&rl, "%s: (mpid %"PRIu64") detected sequence" | |
856 | " numbers which indicate possible connectivity" | |
857 | " problems (previous %"PRIu32") (current %"PRIu32 | |
858 | ")", cfm->name, ccm_mpid, rmp->seq, ccm_seq); | |
859 | } | |
860 | ||
861 | rmp->mpid = ccm_mpid; | |
862 | if (!cfm_fault) { | |
863 | rmp->num_health_ccm++; | |
864 | if (cfm->demand) { | |
865 | timer_set_duration(&cfm->demand_rx_ccm_t, | |
866 | 100 * cfm->ccm_interval_ms); | |
867 | } | |
868 | } | |
869 | rmp->recv = true; | |
870 | cfm->recv_fault |= cfm_fault; | |
871 | rmp->seq = ccm_seq; | |
872 | rmp->opup = !ccm_opdown; | |
873 | rmp->last_rx = time_msec(); | |
874 | } | |
875 | } | |
876 | ||
877 | out: | |
878 | ovs_mutex_unlock(&mutex); | |
879 | } | |
880 | ||
881 | /* Returns and resets the 'cfm->status_changed'. */ | |
882 | bool | |
883 | cfm_check_status_change(struct cfm *cfm) OVS_EXCLUDED(mutex) | |
884 | { | |
885 | bool ret; | |
886 | ||
887 | ovs_mutex_lock(&mutex); | |
888 | ret = cfm->status_changed; | |
889 | cfm->status_changed = false; | |
890 | ovs_mutex_unlock(&mutex); | |
891 | ||
892 | return ret; | |
893 | } | |
894 | ||
895 | static int | |
896 | cfm_get_fault__(const struct cfm *cfm) OVS_REQUIRES(mutex) | |
897 | { | |
898 | if (cfm->fault_override >= 0) { | |
899 | return cfm->fault_override ? CFM_FAULT_OVERRIDE : 0; | |
900 | } | |
901 | return cfm->fault; | |
902 | } | |
903 | ||
904 | /* Gets the fault status of 'cfm'. Returns a bit mask of 'cfm_fault_reason's | |
905 | * indicating the cause of the connectivity fault, or zero if there is no | |
906 | * fault. */ | |
907 | int | |
908 | cfm_get_fault(const struct cfm *cfm) OVS_EXCLUDED(mutex) | |
909 | { | |
910 | int fault; | |
911 | ||
912 | ovs_mutex_lock(&mutex); | |
913 | fault = cfm_get_fault__(cfm); | |
914 | ovs_mutex_unlock(&mutex); | |
915 | return fault; | |
916 | } | |
917 | ||
918 | /* Gets the number of cfm fault flapping since start. */ | |
919 | uint64_t | |
920 | cfm_get_flap_count(const struct cfm *cfm) OVS_EXCLUDED(mutex) | |
921 | { | |
922 | uint64_t flap_count; | |
923 | ovs_mutex_lock(&mutex); | |
924 | flap_count = cfm->flap_count; | |
925 | ovs_mutex_unlock(&mutex); | |
926 | return flap_count; | |
927 | } | |
928 | ||
929 | /* Gets the health of 'cfm'. Returns an integer between 0 and 100 indicating | |
930 | * the health of the link as a percentage of ccm frames received in | |
931 | * CFM_HEALTH_INTERVAL * 'fault_interval' if there is only 1 remote_mpid, | |
932 | * returns 0 if there are no remote_mpids, and returns -1 if there are more | |
933 | * than 1 remote_mpids. */ | |
934 | int | |
935 | cfm_get_health(const struct cfm *cfm) OVS_EXCLUDED(mutex) | |
936 | { | |
937 | int health; | |
938 | ||
939 | ovs_mutex_lock(&mutex); | |
940 | health = cfm->health; | |
941 | ovs_mutex_unlock(&mutex); | |
942 | return health; | |
943 | } | |
944 | ||
945 | static int | |
946 | cfm_get_opup__(const struct cfm *cfm_) OVS_REQUIRES(mutex) | |
947 | { | |
948 | struct cfm *cfm = CONST_CAST(struct cfm *, cfm_); | |
949 | bool extended; | |
950 | ||
951 | atomic_read_relaxed(&cfm->extended, &extended); | |
952 | ||
953 | return extended ? cfm->remote_opup : -1; | |
954 | } | |
955 | ||
956 | /* Gets the operational state of 'cfm'. 'cfm' is considered operationally down | |
957 | * if it has received a CCM with the operationally down bit set from any of its | |
958 | * remote maintenance points. Returns 1 if 'cfm' is operationally up, 0 if | |
959 | * 'cfm' is operationally down, or -1 if 'cfm' has no operational state | |
960 | * (because it isn't in extended mode). */ | |
961 | int | |
962 | cfm_get_opup(const struct cfm *cfm) OVS_EXCLUDED(mutex) | |
963 | { | |
964 | int opup; | |
965 | ||
966 | ovs_mutex_lock(&mutex); | |
967 | opup = cfm_get_opup__(cfm); | |
968 | ovs_mutex_unlock(&mutex); | |
969 | ||
970 | return opup; | |
971 | } | |
972 | ||
973 | static void | |
974 | cfm_get_remote_mpids__(const struct cfm *cfm, uint64_t **rmps, size_t *n_rmps) | |
975 | OVS_REQUIRES(mutex) | |
976 | { | |
977 | *rmps = xmemdup(cfm->rmps_array, cfm->rmps_array_len * sizeof **rmps); | |
978 | *n_rmps = cfm->rmps_array_len; | |
979 | } | |
980 | ||
981 | /* Populates 'rmps' with an array of remote maintenance points reachable by | |
982 | * 'cfm'. The number of remote maintenance points is written to 'n_rmps'. | |
983 | * 'cfm' retains ownership of the array written to 'rmps' */ | |
984 | void | |
985 | cfm_get_remote_mpids(const struct cfm *cfm, uint64_t **rmps, size_t *n_rmps) | |
986 | OVS_EXCLUDED(mutex) | |
987 | { | |
988 | ovs_mutex_lock(&mutex); | |
989 | cfm_get_remote_mpids__(cfm, rmps, n_rmps); | |
990 | ovs_mutex_unlock(&mutex); | |
991 | } | |
992 | ||
993 | /* Extracts the status of 'cfm' and fills in the 's'. */ | |
994 | void | |
995 | cfm_get_status(const struct cfm *cfm, struct cfm_status *s) OVS_EXCLUDED(mutex) | |
996 | { | |
997 | ovs_mutex_lock(&mutex); | |
998 | s->faults = cfm_get_fault__(cfm); | |
999 | s->remote_opstate = cfm_get_opup__(cfm); | |
1000 | s->flap_count = cfm->flap_count; | |
1001 | s->health = cfm->health; | |
1002 | cfm_get_remote_mpids__(cfm, &s->rmps, &s->n_rmps); | |
1003 | ovs_mutex_unlock(&mutex); | |
1004 | } | |
1005 | ||
1006 | static struct cfm * | |
1007 | cfm_find(const char *name) OVS_REQUIRES(mutex) | |
1008 | { | |
1009 | struct cfm *cfm; | |
1010 | ||
1011 | HMAP_FOR_EACH_WITH_HASH (cfm, hmap_node, hash_string(name, 0), all_cfms) { | |
1012 | if (!strcmp(cfm->name, name)) { | |
1013 | return cfm; | |
1014 | } | |
1015 | } | |
1016 | return NULL; | |
1017 | } | |
1018 | ||
1019 | static void | |
1020 | cfm_print_details(struct ds *ds, struct cfm *cfm) OVS_REQUIRES(mutex) | |
1021 | { | |
1022 | struct remote_mp *rmp; | |
1023 | bool extended; | |
1024 | int fault; | |
1025 | ||
1026 | atomic_read_relaxed(&cfm->extended, &extended); | |
1027 | ||
1028 | ds_put_format(ds, "---- %s ----\n", cfm->name); | |
1029 | ds_put_format(ds, "MPID %"PRIu64":%s%s\n", cfm->mpid, | |
1030 | extended ? " extended" : "", | |
1031 | cfm->fault_override >= 0 ? " fault_override" : ""); | |
1032 | ||
1033 | fault = cfm_get_fault__(cfm); | |
1034 | if (fault) { | |
1035 | ds_put_cstr(ds, "\tfault: "); | |
1036 | ds_put_cfm_fault(ds, fault); | |
1037 | ds_put_cstr(ds, "\n"); | |
1038 | } | |
1039 | ||
1040 | if (cfm->health == -1) { | |
1041 | ds_put_format(ds, "\taverage health: undefined\n"); | |
1042 | } else { | |
1043 | ds_put_format(ds, "\taverage health: %d\n", cfm->health); | |
1044 | } | |
1045 | ds_put_format(ds, "\topstate: %s\n", cfm->opup ? "up" : "down"); | |
1046 | ds_put_format(ds, "\tremote_opstate: %s\n", | |
1047 | cfm->remote_opup ? "up" : "down"); | |
1048 | ds_put_format(ds, "\tinterval: %dms\n", cfm->ccm_interval_ms); | |
1049 | ds_put_format(ds, "\tnext CCM tx: %lldms\n", | |
1050 | timer_msecs_until_expired(&cfm->tx_timer)); | |
1051 | ds_put_format(ds, "\tnext fault check: %lldms\n", | |
1052 | timer_msecs_until_expired(&cfm->fault_timer)); | |
1053 | ||
1054 | HMAP_FOR_EACH (rmp, node, &cfm->remote_mps) { | |
1055 | ds_put_format(ds, "Remote MPID %"PRIu64"\n", rmp->mpid); | |
1056 | ds_put_format(ds, "\trecv since check: %s\n", | |
1057 | rmp->recv ? "true" : "false"); | |
1058 | ds_put_format(ds, "\topstate: %s\n", rmp->opup? "up" : "down"); | |
1059 | } | |
1060 | } | |
1061 | ||
1062 | static void | |
1063 | cfm_unixctl_show(struct unixctl_conn *conn, int argc, const char *argv[], | |
1064 | void *aux OVS_UNUSED) OVS_EXCLUDED(mutex) | |
1065 | { | |
1066 | struct ds ds = DS_EMPTY_INITIALIZER; | |
1067 | struct cfm *cfm; | |
1068 | ||
1069 | ovs_mutex_lock(&mutex); | |
1070 | if (argc > 1) { | |
1071 | cfm = cfm_find(argv[1]); | |
1072 | if (!cfm) { | |
1073 | unixctl_command_reply_error(conn, "no such CFM object"); | |
1074 | goto out; | |
1075 | } | |
1076 | cfm_print_details(&ds, cfm); | |
1077 | } else { | |
1078 | HMAP_FOR_EACH (cfm, hmap_node, all_cfms) { | |
1079 | cfm_print_details(&ds, cfm); | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | unixctl_command_reply(conn, ds_cstr(&ds)); | |
1084 | ds_destroy(&ds); | |
1085 | out: | |
1086 | ovs_mutex_unlock(&mutex); | |
1087 | } | |
1088 | ||
1089 | static void | |
1090 | cfm_unixctl_set_fault(struct unixctl_conn *conn, int argc, const char *argv[], | |
1091 | void *aux OVS_UNUSED) OVS_EXCLUDED(mutex) | |
1092 | { | |
1093 | const char *fault_str = argv[argc - 1]; | |
1094 | int fault_override; | |
1095 | struct cfm *cfm; | |
1096 | ||
1097 | ovs_mutex_lock(&mutex); | |
1098 | if (!strcasecmp("true", fault_str)) { | |
1099 | fault_override = 1; | |
1100 | } else if (!strcasecmp("false", fault_str)) { | |
1101 | fault_override = 0; | |
1102 | } else if (!strcasecmp("normal", fault_str)) { | |
1103 | fault_override = -1; | |
1104 | } else { | |
1105 | unixctl_command_reply_error(conn, "unknown fault string"); | |
1106 | goto out; | |
1107 | } | |
1108 | ||
1109 | if (argc > 2) { | |
1110 | cfm = cfm_find(argv[1]); | |
1111 | if (!cfm) { | |
1112 | unixctl_command_reply_error(conn, "no such CFM object"); | |
1113 | goto out; | |
1114 | } | |
1115 | cfm->fault_override = fault_override; | |
1116 | cfm_status_changed(cfm); | |
1117 | } else { | |
1118 | HMAP_FOR_EACH (cfm, hmap_node, all_cfms) { | |
1119 | cfm->fault_override = fault_override; | |
1120 | cfm_status_changed(cfm); | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | unixctl_command_reply(conn, "OK"); | |
1125 | ||
1126 | out: | |
1127 | ovs_mutex_unlock(&mutex); | |
1128 | } |