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b31bcf60 | 1 | /* |
af573985 | 2 | * Copyright (c) 2010, 2011 Nicira Networks. |
b31bcf60 EJ |
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 | ||
84c5d450 | 20 | #include <assert.h> |
b31bcf60 EJ |
21 | #include <stdint.h> |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | ||
20c8e971 | 25 | #include "dynamic-string.h" |
b31bcf60 EJ |
26 | #include "flow.h" |
27 | #include "hash.h" | |
28 | #include "hmap.h" | |
29 | #include "ofpbuf.h" | |
30 | #include "packets.h" | |
31 | #include "poll-loop.h" | |
6fabb78d | 32 | #include "timer.h" |
b31bcf60 | 33 | #include "timeval.h" |
9ac3fce4 | 34 | #include "unixctl.h" |
b31bcf60 EJ |
35 | #include "vlog.h" |
36 | ||
37 | VLOG_DEFINE_THIS_MODULE(cfm); | |
38 | ||
144216a3 EJ |
39 | #define CFM_MAX_RMPS 256 |
40 | ||
c0a2e71d EJ |
41 | /* Ethernet destination address of CCM packets. */ |
42 | static const uint8_t eth_addr_ccm[6] = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x30 }; | |
ef9819b5 EJ |
43 | static const uint8_t eth_addr_ccm_x[6] = { |
44 | 0x01, 0x23, 0x20, 0x00, 0x00, 0x30 | |
45 | }; | |
c0a2e71d EJ |
46 | |
47 | #define ETH_TYPE_CFM 0x8902 | |
48 | ||
49 | /* A 'ccm' represents a Continuity Check Message from the 802.1ag | |
50 | * specification. Continuity Check Messages are broadcast periodically so that | |
51 | * hosts can determine whom they have connectivity to. */ | |
52 | #define CCM_LEN 74 | |
53 | #define CCM_MAID_LEN 48 | |
54 | #define CCM_OPCODE 1 /* CFM message opcode meaning CCM. */ | |
aa62994c | 55 | #define CCM_RDI_MASK 0x80 |
c0a2e71d EJ |
56 | struct ccm { |
57 | uint8_t mdlevel_version; /* MD Level and Version */ | |
58 | uint8_t opcode; | |
59 | uint8_t flags; | |
60 | uint8_t tlv_offset; | |
61 | ovs_be32 seq; | |
62 | ovs_be16 mpid; | |
63 | uint8_t maid[CCM_MAID_LEN]; | |
64 | uint8_t zero[16]; /* Defined by ITU-T Y.1731 should be zero */ | |
65 | } __attribute__((packed)); | |
66 | BUILD_ASSERT_DECL(CCM_LEN == sizeof(struct ccm)); | |
b31bcf60 | 67 | |
a5610457 | 68 | struct cfm { |
6f629657 EJ |
69 | char *name; /* Name of this CFM object. */ |
70 | struct hmap_node hmap_node; /* Node in all_cfms list. */ | |
b31bcf60 | 71 | |
6f629657 | 72 | uint16_t mpid; |
ef9819b5 | 73 | bool extended; /* Extended mode. */ |
a5610457 | 74 | bool fault; /* Indicates connectivity fault. */ |
e14749fa | 75 | bool unexpected_recv; /* Received an unexpected CCM. */ |
a5610457 | 76 | |
9ac3fce4 | 77 | uint32_t seq; /* The sequence number of our last CCM. */ |
b31bcf60 EJ |
78 | uint8_t ccm_interval; /* The CCM transmission interval. */ |
79 | int ccm_interval_ms; /* 'ccm_interval' in milliseconds. */ | |
84c5d450 | 80 | uint8_t maid[CCM_MAID_LEN]; /* The MAID of this CFM. */ |
b31bcf60 | 81 | |
6fabb78d EJ |
82 | struct timer tx_timer; /* Send CCM when expired. */ |
83 | struct timer fault_timer; /* Check for faults when expired. */ | |
93b8df38 | 84 | |
144216a3 | 85 | struct hmap remote_mps; /* Remote MPs. */ |
93b8df38 EJ |
86 | }; |
87 | ||
88 | /* Remote MPs represent foreign network entities that are configured to have | |
89 | * the same MAID as this CFM instance. */ | |
90 | struct remote_mp { | |
91 | uint16_t mpid; /* The Maintenance Point ID of this 'remote_mp'. */ | |
92 | struct hmap_node node; /* Node in 'remote_mps' map. */ | |
93 | ||
94 | bool recv; /* CCM was received since last fault check. */ | |
aa62994c EJ |
95 | bool rdi; /* Remote Defect Indicator. Indicates remote_mp isn't |
96 | receiving CCMs that it's expecting to. */ | |
b31bcf60 EJ |
97 | }; |
98 | ||
dd986e09 | 99 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20); |
6f629657 | 100 | static struct hmap all_cfms = HMAP_INITIALIZER(&all_cfms); |
9ac3fce4 EJ |
101 | |
102 | static void cfm_unixctl_show(struct unixctl_conn *, const char *args, | |
103 | void *aux); | |
dd986e09 | 104 | |
ef9819b5 EJ |
105 | static const uint8_t * |
106 | cfm_ccm_addr(const struct cfm *cfm) | |
107 | { | |
108 | return cfm->extended ? eth_addr_ccm_x : eth_addr_ccm; | |
109 | } | |
110 | ||
84c5d450 | 111 | static void |
a5610457 | 112 | cfm_generate_maid(struct cfm *cfm) |
84c5d450 | 113 | { |
db16e36e EJ |
114 | const char *ovs_md_name = "ovs"; |
115 | const char *ovs_ma_name = "ovs"; | |
84c5d450 EJ |
116 | uint8_t *ma_p; |
117 | size_t md_len, ma_len; | |
118 | ||
a5610457 | 119 | memset(cfm->maid, 0, CCM_MAID_LEN); |
84c5d450 EJ |
120 | |
121 | md_len = strlen(ovs_md_name); | |
122 | ma_len = strlen(ovs_ma_name); | |
123 | ||
124 | assert(md_len && ma_len && md_len + ma_len + 4 <= CCM_MAID_LEN); | |
125 | ||
a5610457 EJ |
126 | cfm->maid[0] = 4; /* MD name string format. */ |
127 | cfm->maid[1] = md_len; /* MD name size. */ | |
128 | memcpy(&cfm->maid[2], ovs_md_name, md_len); /* MD name. */ | |
84c5d450 | 129 | |
a5610457 | 130 | ma_p = cfm->maid + 2 + md_len; |
84c5d450 EJ |
131 | ma_p[0] = 2; /* MA name string format. */ |
132 | ma_p[1] = ma_len; /* MA name size. */ | |
133 | memcpy(&ma_p[2], ovs_ma_name, ma_len); /* MA name. */ | |
134 | } | |
135 | ||
b31bcf60 EJ |
136 | static int |
137 | ccm_interval_to_ms(uint8_t interval) | |
138 | { | |
139 | switch (interval) { | |
140 | case 0: NOT_REACHED(); /* Explicitly not supported by 802.1ag. */ | |
141 | case 1: return 3; /* Not recommended due to timer resolution. */ | |
142 | case 2: return 10; /* Not recommended due to timer resolution. */ | |
143 | case 3: return 100; | |
144 | case 4: return 1000; | |
145 | case 5: return 10000; | |
146 | case 6: return 60000; | |
147 | case 7: return 600000; | |
148 | default: NOT_REACHED(); /* Explicitly not supported by 802.1ag. */ | |
149 | } | |
150 | ||
151 | NOT_REACHED(); | |
152 | } | |
153 | ||
aac19178 | 154 | static long long int |
a5610457 | 155 | cfm_fault_interval(struct cfm *cfm) |
aac19178 EJ |
156 | { |
157 | /* According to the 802.1ag specification we should assume every other MP | |
158 | * with the same MAID has the same transmission interval that we have. If | |
159 | * an MP has a different interval, cfm_process_heartbeat will register it | |
160 | * as a fault (likely due to a configuration error). Thus we can check all | |
161 | * MPs at once making this quite a bit simpler. | |
162 | * | |
163 | * According to the specification we should check when (ccm_interval_ms * | |
164 | * 3.5)ms have passed. */ | |
a5610457 | 165 | return (cfm->ccm_interval_ms * 7) / 2; |
aac19178 EJ |
166 | } |
167 | ||
b31bcf60 EJ |
168 | static uint8_t |
169 | ms_to_ccm_interval(int interval_ms) | |
170 | { | |
171 | uint8_t i; | |
172 | ||
173 | for (i = 7; i > 0; i--) { | |
174 | if (ccm_interval_to_ms(i) <= interval_ms) { | |
175 | return i; | |
176 | } | |
177 | } | |
178 | ||
179 | return 1; | |
180 | } | |
181 | ||
b31bcf60 EJ |
182 | static uint32_t |
183 | hash_mpid(uint8_t mpid) | |
184 | { | |
185 | return hash_int(mpid, 0); | |
186 | } | |
187 | ||
188 | static bool | |
189 | cfm_is_valid_mpid(uint32_t mpid) | |
190 | { | |
191 | /* 802.1ag specification requires MPIDs to be within the range [1, 8191] */ | |
192 | return mpid >= 1 && mpid <= 8191; | |
193 | } | |
194 | ||
195 | static struct remote_mp * | |
144216a3 | 196 | lookup_remote_mp(const struct cfm *cfm, uint16_t mpid) |
b31bcf60 EJ |
197 | { |
198 | struct remote_mp *rmp; | |
199 | ||
144216a3 | 200 | HMAP_FOR_EACH_IN_BUCKET (rmp, node, hash_mpid(mpid), &cfm->remote_mps) { |
b31bcf60 EJ |
201 | if (rmp->mpid == mpid) { |
202 | return rmp; | |
203 | } | |
204 | } | |
205 | ||
206 | return NULL; | |
207 | } | |
208 | ||
9ac3fce4 EJ |
209 | void |
210 | cfm_init(void) | |
211 | { | |
212 | unixctl_command_register("cfm/show", cfm_unixctl_show, NULL); | |
213 | } | |
214 | ||
6f629657 EJ |
215 | /* Allocates a 'cfm' object called 'name'. 'cfm' should be initialized by |
216 | * cfm_configure() before use. */ | |
b31bcf60 | 217 | struct cfm * |
6f629657 | 218 | cfm_create(const char *name) |
b31bcf60 EJ |
219 | { |
220 | struct cfm *cfm; | |
b31bcf60 | 221 | |
a5610457 | 222 | cfm = xzalloc(sizeof *cfm); |
6f629657 | 223 | cfm->name = xstrdup(name); |
a5610457 EJ |
224 | hmap_init(&cfm->remote_mps); |
225 | cfm_generate_maid(cfm); | |
6f629657 | 226 | hmap_insert(&all_cfms, &cfm->hmap_node, hash_string(cfm->name, 0)); |
b31bcf60 EJ |
227 | return cfm; |
228 | } | |
229 | ||
230 | void | |
231 | cfm_destroy(struct cfm *cfm) | |
232 | { | |
233 | struct remote_mp *rmp, *rmp_next; | |
b31bcf60 EJ |
234 | |
235 | if (!cfm) { | |
236 | return; | |
237 | } | |
238 | ||
a5610457 EJ |
239 | HMAP_FOR_EACH_SAFE (rmp, rmp_next, node, &cfm->remote_mps) { |
240 | hmap_remove(&cfm->remote_mps, &rmp->node); | |
b31bcf60 EJ |
241 | free(rmp); |
242 | } | |
243 | ||
a5610457 | 244 | hmap_destroy(&cfm->remote_mps); |
6f629657 EJ |
245 | hmap_remove(&all_cfms, &cfm->hmap_node); |
246 | free(cfm->name); | |
a5610457 | 247 | free(cfm); |
b31bcf60 EJ |
248 | } |
249 | ||
a58727fb EJ |
250 | /* Should be run periodically to update fault statistics messages. */ |
251 | void | |
b31bcf60 EJ |
252 | cfm_run(struct cfm *cfm) |
253 | { | |
a5610457 EJ |
254 | if (timer_expired(&cfm->fault_timer)) { |
255 | long long int interval = cfm_fault_interval(cfm); | |
144216a3 | 256 | struct remote_mp *rmp, *rmp_next; |
b31bcf60 | 257 | |
e14749fa | 258 | cfm->fault = cfm->unexpected_recv; |
e14749fa EJ |
259 | cfm->unexpected_recv = false; |
260 | ||
144216a3 | 261 | HMAP_FOR_EACH_SAFE (rmp, rmp_next, node, &cfm->remote_mps) { |
6fabb78d | 262 | |
144216a3 | 263 | if (!rmp->recv) { |
32977975 EJ |
264 | VLOG_DBG("%s: No CCM from RMP %"PRIu16" in the last %lldms", |
265 | cfm->name, rmp->mpid, interval); | |
144216a3 EJ |
266 | hmap_remove(&cfm->remote_mps, &rmp->node); |
267 | free(rmp); | |
268 | } else { | |
269 | rmp->recv = false; | |
270 | ||
271 | if (rmp->mpid == cfm->mpid) { | |
272 | VLOG_WARN_RL(&rl, "%s: Received CCM with local MPID (%d)", | |
273 | cfm->name, rmp->mpid); | |
274 | cfm->fault = true; | |
275 | } | |
276 | ||
277 | if (rmp->rdi) { | |
278 | VLOG_DBG("%s: RDI bit flagged from RMP %"PRIu16, cfm->name, | |
279 | rmp->mpid); | |
280 | cfm->fault = true; | |
281 | } | |
6fabb78d | 282 | } |
b31bcf60 EJ |
283 | } |
284 | ||
144216a3 | 285 | if (hmap_is_empty(&cfm->remote_mps)) { |
aa62994c | 286 | cfm->fault = true; |
dd986e09 EJ |
287 | } |
288 | ||
a5610457 | 289 | timer_set_duration(&cfm->fault_timer, interval); |
b31bcf60 | 290 | } |
a58727fb | 291 | } |
b31bcf60 | 292 | |
a58727fb EJ |
293 | /* Should be run periodically to check if the CFM module has a CCM message it |
294 | * wishes to send. */ | |
295 | bool | |
296 | cfm_should_send_ccm(struct cfm *cfm) | |
297 | { | |
a5610457 | 298 | return timer_expired(&cfm->tx_timer); |
a58727fb EJ |
299 | } |
300 | ||
c0a2e71d | 301 | /* Composes a CCM message into 'packet'. Messages generated with this function |
a58727fb EJ |
302 | * should be sent whenever cfm_should_send_ccm() indicates. */ |
303 | void | |
c0a2e71d EJ |
304 | cfm_compose_ccm(struct cfm *cfm, struct ofpbuf *packet, |
305 | uint8_t eth_src[ETH_ADDR_LEN]) | |
a58727fb | 306 | { |
c0a2e71d EJ |
307 | struct ccm *ccm; |
308 | ||
a5610457 | 309 | timer_set_duration(&cfm->tx_timer, cfm->ccm_interval_ms); |
ef9819b5 | 310 | ccm = eth_compose(packet, cfm_ccm_addr(cfm), eth_src, ETH_TYPE_CFM, |
c0a2e71d | 311 | sizeof *ccm); |
a58727fb EJ |
312 | ccm->mdlevel_version = 0; |
313 | ccm->opcode = CCM_OPCODE; | |
314 | ccm->tlv_offset = 70; | |
a5610457 EJ |
315 | ccm->seq = htonl(++cfm->seq); |
316 | ccm->mpid = htons(cfm->mpid); | |
317 | ccm->flags = cfm->ccm_interval; | |
318 | memcpy(ccm->maid, cfm->maid, sizeof ccm->maid); | |
56717eb1 | 319 | memset(ccm->zero, 0, sizeof ccm->zero); |
aa62994c | 320 | |
144216a3 | 321 | if (hmap_is_empty(&cfm->remote_mps)) { |
aa62994c EJ |
322 | ccm->flags |= CCM_RDI_MASK; |
323 | } | |
b31bcf60 EJ |
324 | } |
325 | ||
326 | void | |
327 | cfm_wait(struct cfm *cfm) | |
328 | { | |
b31bcf60 | 329 | |
a5610457 EJ |
330 | timer_wait(&cfm->tx_timer); |
331 | timer_wait(&cfm->fault_timer); | |
b31bcf60 EJ |
332 | } |
333 | ||
a5610457 | 334 | /* Configures 'cfm' with settings from 's'. */ |
b31bcf60 | 335 | bool |
a5610457 | 336 | cfm_configure(struct cfm *cfm, const struct cfm_settings *s) |
b31bcf60 | 337 | { |
9aa952b2 | 338 | uint8_t interval; |
b31bcf60 | 339 | |
144216a3 | 340 | if (!cfm_is_valid_mpid(s->mpid) || s->interval <= 0) { |
b31bcf60 EJ |
341 | return false; |
342 | } | |
343 | ||
a5610457 | 344 | cfm->mpid = s->mpid; |
ef9819b5 | 345 | cfm->extended = s->extended; |
a5610457 | 346 | interval = ms_to_ccm_interval(s->interval); |
9aa952b2 | 347 | |
a5610457 EJ |
348 | if (interval != cfm->ccm_interval) { |
349 | cfm->ccm_interval = interval; | |
350 | cfm->ccm_interval_ms = ccm_interval_to_ms(interval); | |
b31bcf60 | 351 | |
a5610457 EJ |
352 | timer_set_expired(&cfm->tx_timer); |
353 | timer_set_duration(&cfm->fault_timer, cfm_fault_interval(cfm)); | |
354 | } | |
b31bcf60 | 355 | |
a5610457 | 356 | return true; |
b31bcf60 EJ |
357 | } |
358 | ||
ef9819b5 | 359 | /* Returns true if 'cfm' should process packets from 'flow'. */ |
b31bcf60 | 360 | bool |
ef9819b5 | 361 | cfm_should_process_flow(const struct cfm *cfm, const struct flow *flow) |
b31bcf60 EJ |
362 | { |
363 | return (ntohs(flow->dl_type) == ETH_TYPE_CFM | |
ef9819b5 | 364 | && eth_addr_equals(flow->dl_dst, cfm_ccm_addr(cfm))); |
b31bcf60 EJ |
365 | } |
366 | ||
367 | /* Updates internal statistics relevant to packet 'p'. Should be called on | |
368 | * every packet whose flow returned true when passed to | |
369 | * cfm_should_process_flow. */ | |
370 | void | |
371 | cfm_process_heartbeat(struct cfm *cfm, const struct ofpbuf *p) | |
372 | { | |
373 | struct ccm *ccm; | |
aa62994c | 374 | bool ccm_rdi; |
b31bcf60 | 375 | uint16_t ccm_mpid; |
b31bcf60 EJ |
376 | uint8_t ccm_interval; |
377 | struct remote_mp *rmp; | |
0dd17bfd | 378 | struct eth_header *eth; |
b31bcf60 | 379 | |
0dd17bfd | 380 | eth = p->l2; |
b31bcf60 EJ |
381 | ccm = ofpbuf_at(p, (uint8_t *)p->l3 - (uint8_t *)p->data, CCM_LEN); |
382 | ||
383 | if (!ccm) { | |
32977975 EJ |
384 | VLOG_INFO_RL(&rl, "%s: Received an unparseable 802.1ag CCM heartbeat.", |
385 | cfm->name); | |
b31bcf60 EJ |
386 | return; |
387 | } | |
388 | ||
389 | if (ccm->opcode != CCM_OPCODE) { | |
32977975 EJ |
390 | VLOG_INFO_RL(&rl, "%s: Received an unsupported 802.1ag message. " |
391 | "(opcode %u)", cfm->name, ccm->opcode); | |
b31bcf60 EJ |
392 | return; |
393 | } | |
394 | ||
5e809322 | 395 | /* According to the 802.1ag specification, reception of a CCM with an |
aa7f1158 EJ |
396 | * incorrect ccm_interval, unexpected MAID, or unexpected MPID should |
397 | * trigger a fault. We ignore this requirement for several reasons. | |
5e809322 EJ |
398 | * |
399 | * Faults can cause a controller or Open vSwitch to make potentially | |
400 | * expensive changes to the network topology. It seems prudent to trigger | |
401 | * them judiciously, especially when CFM is used to check slave status of | |
402 | * bonds. Furthermore, faults can be maliciously triggered by crafting | |
403 | * invalid CCMs. */ | |
a5610457 | 404 | if (memcmp(ccm->maid, cfm->maid, sizeof ccm->maid)) { |
e14749fa | 405 | cfm->unexpected_recv = true; |
32977975 EJ |
406 | VLOG_WARN_RL(&rl, "%s: Received unexpected remote MAID from MAC " |
407 | ETH_ADDR_FMT, cfm->name, ETH_ADDR_ARGS(eth->eth_src)); | |
f805c4cc EJ |
408 | } else { |
409 | ccm_mpid = ntohs(ccm->mpid); | |
f805c4cc | 410 | ccm_interval = ccm->flags & 0x7; |
aa62994c | 411 | ccm_rdi = ccm->flags & CCM_RDI_MASK; |
b31bcf60 | 412 | |
144216a3 EJ |
413 | if (ccm_interval != cfm->ccm_interval) { |
414 | VLOG_WARN_RL(&rl, "%s: received a CCM with an invalid interval" | |
415 | " (%"PRIu8") from RMP %"PRIu16, cfm->name, | |
416 | ccm_interval, ccm_mpid); | |
417 | } | |
b31bcf60 | 418 | |
144216a3 | 419 | rmp = lookup_remote_mp(cfm, ccm_mpid); |
0dd17bfd | 420 | if (rmp) { |
dd986e09 | 421 | rmp->recv = true; |
aa62994c | 422 | rmp->rdi = ccm_rdi; |
144216a3 EJ |
423 | } else if (hmap_count(&cfm->remote_mps) < CFM_MAX_RMPS) { |
424 | rmp = xmalloc(sizeof *rmp); | |
425 | rmp->mpid = ccm_mpid; | |
426 | rmp->recv = true; | |
427 | rmp->rdi = ccm_rdi; | |
428 | hmap_insert(&cfm->remote_mps, &rmp->node, hash_mpid(rmp->mpid)); | |
0dd17bfd | 429 | } else { |
e14749fa | 430 | cfm->unexpected_recv = true; |
144216a3 EJ |
431 | VLOG_WARN_RL(&rl, "%s: dropped CCM with MPID %d from MAC " |
432 | ETH_ADDR_FMT, cfm->name, ccm_mpid, | |
32977975 | 433 | ETH_ADDR_ARGS(eth->eth_src)); |
f805c4cc | 434 | } |
70e3e6af | 435 | |
75e61cb9 EJ |
436 | VLOG_DBG("%s: Received CCM (seq %"PRIu32") (mpid %"PRIu16")" |
437 | " (interval %"PRIu8") (RDI %s)", cfm->name, ntohl(ccm->seq), | |
438 | ccm_mpid, ccm_interval, ccm_rdi ? "true" : "false"); | |
b31bcf60 | 439 | } |
b31bcf60 | 440 | } |
20c8e971 | 441 | |
a5610457 EJ |
442 | /* Gets the fault status of 'cfm'. Returns true when 'cfm' has detected |
443 | * connectivity problems, false otherwise. */ | |
444 | bool | |
445 | cfm_get_fault(const struct cfm *cfm) | |
446 | { | |
447 | return cfm->fault; | |
448 | } | |
449 | ||
450 | static struct cfm * | |
9ac3fce4 | 451 | cfm_find(const char *name) |
20c8e971 | 452 | { |
a5610457 | 453 | struct cfm *cfm; |
9ac3fce4 | 454 | |
6f629657 EJ |
455 | HMAP_FOR_EACH_WITH_HASH (cfm, hmap_node, hash_string(name, 0), &all_cfms) { |
456 | if (!strcmp(cfm->name, name)) { | |
a5610457 | 457 | return cfm; |
9ac3fce4 EJ |
458 | } |
459 | } | |
460 | return NULL; | |
461 | } | |
462 | ||
463 | static void | |
464 | cfm_unixctl_show(struct unixctl_conn *conn, | |
465 | const char *args, void *aux OVS_UNUSED) | |
466 | { | |
467 | struct ds ds = DS_EMPTY_INITIALIZER; | |
a5610457 | 468 | const struct cfm *cfm; |
20c8e971 EJ |
469 | struct remote_mp *rmp; |
470 | ||
a5610457 EJ |
471 | cfm = cfm_find(args); |
472 | if (!cfm) { | |
9ac3fce4 EJ |
473 | unixctl_command_reply(conn, 501, "no such CFM object"); |
474 | return; | |
475 | } | |
20c8e971 | 476 | |
144216a3 | 477 | ds_put_format(&ds, "MPID %"PRIu16":%s%s\n", cfm->mpid, |
aa62994c | 478 | cfm->fault ? " fault" : "", |
144216a3 | 479 | cfm->unexpected_recv ? " unexpected_recv" : ""); |
9ac3fce4 | 480 | |
a5610457 | 481 | ds_put_format(&ds, "\tinterval: %dms\n", cfm->ccm_interval_ms); |
9ac3fce4 | 482 | ds_put_format(&ds, "\tnext CCM tx: %lldms\n", |
a5610457 | 483 | timer_msecs_until_expired(&cfm->tx_timer)); |
9ac3fce4 | 484 | ds_put_format(&ds, "\tnext fault check: %lldms\n", |
a5610457 | 485 | timer_msecs_until_expired(&cfm->fault_timer)); |
20c8e971 | 486 | |
9ac3fce4 | 487 | ds_put_cstr(&ds, "\n"); |
a5610457 | 488 | HMAP_FOR_EACH (rmp, node, &cfm->remote_mps) { |
144216a3 EJ |
489 | ds_put_format(&ds, "Remote MPID %"PRIu16":%s\n", rmp->mpid, |
490 | rmp->rdi ? " rdi" : ""); | |
9ac3fce4 | 491 | ds_put_format(&ds, "\trecv since check: %s", |
dd986e09 | 492 | rmp->recv ? "true" : "false"); |
20c8e971 | 493 | } |
9ac3fce4 EJ |
494 | |
495 | unixctl_command_reply(conn, 200, ds_cstr(&ds)); | |
496 | ds_destroy(&ds); | |
20c8e971 | 497 | } |