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b31bcf60 | 1 | /* |
8917f72c | 2 | * Copyright (c) 2010, 2011, 2012, 2013, 2014 Nicira, Inc. |
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 | ||
20 | #include <stdint.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | ||
348f01e3 | 24 | #include "byte-order.h" |
f23d157c | 25 | #include "connectivity.h" |
20c8e971 | 26 | #include "dynamic-string.h" |
b31bcf60 EJ |
27 | #include "flow.h" |
28 | #include "hash.h" | |
29 | #include "hmap.h" | |
90967e95 | 30 | #include "netdev.h" |
b31bcf60 EJ |
31 | #include "ofpbuf.h" |
32 | #include "packets.h" | |
33 | #include "poll-loop.h" | |
189cb9e4 | 34 | #include "random.h" |
f23d157c | 35 | #include "seq.h" |
6fabb78d | 36 | #include "timer.h" |
b31bcf60 | 37 | #include "timeval.h" |
9ac3fce4 | 38 | #include "unixctl.h" |
b31bcf60 EJ |
39 | #include "vlog.h" |
40 | ||
41 | VLOG_DEFINE_THIS_MODULE(cfm); | |
42 | ||
144216a3 EJ |
43 | #define CFM_MAX_RMPS 256 |
44 | ||
c0a2e71d EJ |
45 | /* Ethernet destination address of CCM packets. */ |
46 | static const uint8_t eth_addr_ccm[6] = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x30 }; | |
ef9819b5 EJ |
47 | static const uint8_t eth_addr_ccm_x[6] = { |
48 | 0x01, 0x23, 0x20, 0x00, 0x00, 0x30 | |
49 | }; | |
c0a2e71d EJ |
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 | |
ce27cbee BP |
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 | |
c0a2e71d EJ |
62 | #define CCM_MAID_LEN 48 |
63 | #define CCM_OPCODE 1 /* CFM message opcode meaning CCM. */ | |
aa62994c | 64 | #define CCM_RDI_MASK 0x80 |
3967a833 | 65 | #define CFM_HEALTH_INTERVAL 6 |
13b6bae6 LS |
66 | |
67 | OVS_PACKED( | |
c0a2e71d | 68 | struct ccm { |
6bdf30ee EJ |
69 | uint8_t mdlevel_version; /* MD Level and Version */ |
70 | uint8_t opcode; | |
71 | uint8_t flags; | |
72 | uint8_t tlv_offset; | |
c0a2e71d EJ |
73 | ovs_be32 seq; |
74 | ovs_be16 mpid; | |
6bdf30ee | 75 | uint8_t maid[CCM_MAID_LEN]; |
de724029 EJ |
76 | |
77 | /* Defined by ITU-T Y.1731 should be zero */ | |
78 | ovs_be16 interval_ms_x; /* Transmission interval in ms. */ | |
348f01e3 | 79 | ovs_be64 mpid64; /* MPID in extended mode. */ |
86dc6501 | 80 | uint8_t opdown; /* Operationally down. */ |
6bdf30ee | 81 | uint8_t zero[5]; |
ce27cbee BP |
82 | |
83 | /* TLV space. */ | |
84 | uint8_t end_tlv; | |
13b6bae6 | 85 | }); |
c0a2e71d | 86 | BUILD_ASSERT_DECL(CCM_LEN == sizeof(struct ccm)); |
b31bcf60 | 87 | |
a5610457 | 88 | struct cfm { |
90967e95 | 89 | const char *name; /* Name of this CFM object. */ |
6f629657 | 90 | struct hmap_node hmap_node; /* Node in all_cfms list. */ |
b31bcf60 | 91 | |
90967e95 EJ |
92 | struct netdev *netdev; |
93 | uint64_t rx_packets; /* Packets received by 'netdev'. */ | |
94 | ||
348f01e3 | 95 | uint64_t mpid; |
90967e95 | 96 | bool demand; /* Demand mode. */ |
ec9f40dc | 97 | bool booted; /* A full fault interval has occurred. */ |
2b540ecb | 98 | enum cfm_fault_reason fault; /* Connectivity fault status. */ |
ec9f40dc | 99 | enum cfm_fault_reason recv_fault; /* Bit mask of faults occurring on |
2b540ecb | 100 | receive. */ |
86dc6501 EJ |
101 | bool opup; /* Operational State. */ |
102 | bool remote_opup; /* Remote Operational State. */ | |
a5610457 | 103 | |
d7243b93 EJ |
104 | int fault_override; /* Manual override of 'fault' status. |
105 | Ignored if negative. */ | |
106 | ||
9ac3fce4 | 107 | uint32_t seq; /* The sequence number of our last CCM. */ |
b31bcf60 EJ |
108 | uint8_t ccm_interval; /* The CCM transmission interval. */ |
109 | int ccm_interval_ms; /* 'ccm_interval' in milliseconds. */ | |
189cb9e4 EJ |
110 | uint16_t ccm_vlan; /* Vlan tag of CCM PDUs. CFM_RANDOM_VLAN if |
111 | random. */ | |
a7aa2d3c | 112 | uint8_t ccm_pcp; /* Priority of CCM PDUs. */ |
84c5d450 | 113 | uint8_t maid[CCM_MAID_LEN]; /* The MAID of this CFM. */ |
b31bcf60 | 114 | |
6fabb78d EJ |
115 | struct timer tx_timer; /* Send CCM when expired. */ |
116 | struct timer fault_timer; /* Check for faults when expired. */ | |
93b8df38 | 117 | |
144216a3 | 118 | struct hmap remote_mps; /* Remote MPs. */ |
1de11730 EJ |
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'. */ | |
3967a833 MM |
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. */ | |
b03c6f99 | 129 | long long int last_tx; /* Last CCM transmission time. */ |
8e9a73fa | 130 | |
13b1b2ae EJ |
131 | atomic_bool check_tnl_key; /* Verify the tunnel key of inbound packets? */ |
132 | atomic_bool extended; /* Extended mode. */ | |
37bec3d3 | 133 | struct ovs_refcount ref_cnt; |
76c4290d AW |
134 | |
135 | uint64_t flap_count; /* Count the flaps since boot. */ | |
93b8df38 EJ |
136 | }; |
137 | ||
138 | /* Remote MPs represent foreign network entities that are configured to have | |
139 | * the same MAID as this CFM instance. */ | |
140 | struct remote_mp { | |
348f01e3 | 141 | uint64_t mpid; /* The Maintenance Point ID of this 'remote_mp'. */ |
93b8df38 EJ |
142 | struct hmap_node node; /* Node in 'remote_mps' map. */ |
143 | ||
144 | bool recv; /* CCM was received since last fault check. */ | |
86dc6501 | 145 | bool opup; /* Operational State. */ |
8210113e | 146 | uint32_t seq; /* Most recently received sequence number. */ |
3967a833 MM |
147 | uint8_t num_health_ccm; /* Number of received ccm frames every |
148 | CFM_HEALTH_INTERVAL * 'fault_interval'. */ | |
c3f72482 | 149 | long long int last_rx; /* Last CCM reception time. */ |
3967a833 | 150 | |
b31bcf60 EJ |
151 | }; |
152 | ||
8210113e | 153 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(20, 30); |
13b1b2ae EJ |
154 | |
155 | static struct ovs_mutex mutex = OVS_MUTEX_INITIALIZER; | |
156 | static struct hmap all_cfms__ = HMAP_INITIALIZER(&all_cfms__); | |
157 | static struct hmap *const all_cfms OVS_GUARDED_BY(mutex) = &all_cfms__; | |
9ac3fce4 | 158 | |
0e15264f | 159 | static unixctl_cb_func cfm_unixctl_show; |
d7243b93 | 160 | static unixctl_cb_func cfm_unixctl_set_fault; |
dd986e09 | 161 | |
90967e95 | 162 | static uint64_t |
bd3950dd | 163 | cfm_rx_packets(const struct cfm *cfm) OVS_REQUIRES(mutex) |
90967e95 EJ |
164 | { |
165 | struct netdev_stats stats; | |
166 | ||
167 | if (!netdev_get_stats(cfm->netdev, &stats)) { | |
168 | return stats.rx_packets; | |
169 | } else { | |
170 | return 0; | |
171 | } | |
172 | } | |
173 | ||
ef9819b5 | 174 | static const uint8_t * |
5675cb4c | 175 | cfm_ccm_addr(struct cfm *cfm) |
ef9819b5 | 176 | { |
13b1b2ae EJ |
177 | bool extended; |
178 | atomic_read(&cfm->extended, &extended); | |
179 | return extended ? eth_addr_ccm_x : eth_addr_ccm; | |
ef9819b5 EJ |
180 | } |
181 | ||
b9380396 EJ |
182 | /* Returns the string representation of the given cfm_fault_reason 'reason'. */ |
183 | const char * | |
13b1b2ae EJ |
184 | cfm_fault_reason_to_str(int reason) |
185 | { | |
b9380396 EJ |
186 | switch (reason) { |
187 | #define CFM_FAULT_REASON(NAME, STR) case CFM_FAULT_##NAME: return #STR; | |
188 | CFM_FAULT_REASONS | |
189 | #undef CFM_FAULT_REASON | |
190 | default: return "<unknown>"; | |
191 | } | |
192 | } | |
193 | ||
194 | static void | |
c3f72482 | 195 | ds_put_cfm_fault(struct ds *ds, int fault) |
b9380396 | 196 | { |
b9380396 EJ |
197 | int i; |
198 | ||
199 | for (i = 0; i < CFM_FAULT_N_REASONS; i++) { | |
200 | int reason = 1 << i; | |
201 | ||
c3f72482 EJ |
202 | if (fault & reason) { |
203 | ds_put_format(ds, "%s ", cfm_fault_reason_to_str(reason)); | |
b9380396 EJ |
204 | } |
205 | } | |
c3f72482 EJ |
206 | |
207 | ds_chomp(ds, ' '); | |
b9380396 EJ |
208 | } |
209 | ||
84c5d450 | 210 | static void |
bd3950dd | 211 | cfm_generate_maid(struct cfm *cfm) OVS_REQUIRES(mutex) |
84c5d450 | 212 | { |
db16e36e EJ |
213 | const char *ovs_md_name = "ovs"; |
214 | const char *ovs_ma_name = "ovs"; | |
84c5d450 EJ |
215 | uint8_t *ma_p; |
216 | size_t md_len, ma_len; | |
217 | ||
a5610457 | 218 | memset(cfm->maid, 0, CCM_MAID_LEN); |
84c5d450 EJ |
219 | |
220 | md_len = strlen(ovs_md_name); | |
221 | ma_len = strlen(ovs_ma_name); | |
222 | ||
cb22974d | 223 | ovs_assert(md_len && ma_len && md_len + ma_len + 4 <= CCM_MAID_LEN); |
84c5d450 | 224 | |
a5610457 EJ |
225 | cfm->maid[0] = 4; /* MD name string format. */ |
226 | cfm->maid[1] = md_len; /* MD name size. */ | |
227 | memcpy(&cfm->maid[2], ovs_md_name, md_len); /* MD name. */ | |
84c5d450 | 228 | |
a5610457 | 229 | ma_p = cfm->maid + 2 + md_len; |
84c5d450 EJ |
230 | ma_p[0] = 2; /* MA name string format. */ |
231 | ma_p[1] = ma_len; /* MA name size. */ | |
232 | memcpy(&ma_p[2], ovs_ma_name, ma_len); /* MA name. */ | |
233 | } | |
234 | ||
b31bcf60 EJ |
235 | static int |
236 | ccm_interval_to_ms(uint8_t interval) | |
237 | { | |
238 | switch (interval) { | |
428b2edd | 239 | case 0: OVS_NOT_REACHED(); /* Explicitly not supported by 802.1ag. */ |
b31bcf60 EJ |
240 | case 1: return 3; /* Not recommended due to timer resolution. */ |
241 | case 2: return 10; /* Not recommended due to timer resolution. */ | |
242 | case 3: return 100; | |
243 | case 4: return 1000; | |
244 | case 5: return 10000; | |
245 | case 6: return 60000; | |
246 | case 7: return 600000; | |
428b2edd | 247 | default: OVS_NOT_REACHED(); /* Explicitly not supported by 802.1ag. */ |
b31bcf60 EJ |
248 | } |
249 | ||
428b2edd | 250 | OVS_NOT_REACHED(); |
b31bcf60 EJ |
251 | } |
252 | ||
aac19178 | 253 | static long long int |
bd3950dd | 254 | cfm_fault_interval(struct cfm *cfm) OVS_REQUIRES(mutex) |
aac19178 EJ |
255 | { |
256 | /* According to the 802.1ag specification we should assume every other MP | |
257 | * with the same MAID has the same transmission interval that we have. If | |
258 | * an MP has a different interval, cfm_process_heartbeat will register it | |
259 | * as a fault (likely due to a configuration error). Thus we can check all | |
260 | * MPs at once making this quite a bit simpler. | |
261 | * | |
03f209ba AW |
262 | * When cfm is not in demand mode, we check when (ccm_interval_ms * 3.5) ms |
263 | * have passed. When cfm is in demand mode, we check when | |
264 | * (MAX(ccm_interval_ms, 500) * 3.5) ms have passed. This ensures that | |
265 | * ovs-vswitchd has enough time to pull statistics from the datapath. */ | |
266 | ||
267 | return (MAX(cfm->ccm_interval_ms, cfm->demand ? 500 : cfm->ccm_interval_ms) | |
268 | * 7) / 2; | |
aac19178 EJ |
269 | } |
270 | ||
b31bcf60 EJ |
271 | static uint8_t |
272 | ms_to_ccm_interval(int interval_ms) | |
273 | { | |
274 | uint8_t i; | |
275 | ||
276 | for (i = 7; i > 0; i--) { | |
277 | if (ccm_interval_to_ms(i) <= interval_ms) { | |
278 | return i; | |
279 | } | |
280 | } | |
281 | ||
282 | return 1; | |
283 | } | |
284 | ||
b31bcf60 | 285 | static uint32_t |
348f01e3 | 286 | hash_mpid(uint64_t mpid) |
b31bcf60 | 287 | { |
348f01e3 | 288 | return hash_bytes(&mpid, sizeof mpid, 0); |
b31bcf60 EJ |
289 | } |
290 | ||
291 | static bool | |
348f01e3 | 292 | cfm_is_valid_mpid(bool extended, uint64_t mpid) |
b31bcf60 | 293 | { |
348f01e3 EJ |
294 | /* 802.1ag specification requires MPIDs to be within the range [1, 8191]. |
295 | * In extended mode we relax this requirement. */ | |
296 | return mpid >= 1 && (extended || mpid <= 8191); | |
b31bcf60 EJ |
297 | } |
298 | ||
299 | static struct remote_mp * | |
bd3950dd | 300 | lookup_remote_mp(const struct cfm *cfm, uint64_t mpid) OVS_REQUIRES(mutex) |
b31bcf60 EJ |
301 | { |
302 | struct remote_mp *rmp; | |
303 | ||
144216a3 | 304 | HMAP_FOR_EACH_IN_BUCKET (rmp, node, hash_mpid(mpid), &cfm->remote_mps) { |
b31bcf60 EJ |
305 | if (rmp->mpid == mpid) { |
306 | return rmp; | |
307 | } | |
308 | } | |
309 | ||
310 | return NULL; | |
311 | } | |
312 | ||
9ac3fce4 EJ |
313 | void |
314 | cfm_init(void) | |
315 | { | |
0e15264f | 316 | unixctl_command_register("cfm/show", "[interface]", 0, 1, cfm_unixctl_show, |
ae75dae3 | 317 | NULL); |
d7243b93 EJ |
318 | unixctl_command_register("cfm/set-fault", "[interface] normal|false|true", |
319 | 1, 2, cfm_unixctl_set_fault, NULL); | |
9ac3fce4 EJ |
320 | } |
321 | ||
6f629657 EJ |
322 | /* Allocates a 'cfm' object called 'name'. 'cfm' should be initialized by |
323 | * cfm_configure() before use. */ | |
b31bcf60 | 324 | struct cfm * |
13b1b2ae | 325 | cfm_create(const struct netdev *netdev) OVS_EXCLUDED(mutex) |
b31bcf60 EJ |
326 | { |
327 | struct cfm *cfm; | |
b31bcf60 | 328 | |
a5610457 | 329 | cfm = xzalloc(sizeof *cfm); |
90967e95 EJ |
330 | cfm->netdev = netdev_ref(netdev); |
331 | cfm->name = netdev_get_name(cfm->netdev); | |
a5610457 | 332 | hmap_init(&cfm->remote_mps); |
86dc6501 | 333 | cfm->remote_opup = true; |
d7243b93 | 334 | cfm->fault_override = -1; |
3967a833 | 335 | cfm->health = -1; |
b03c6f99 | 336 | cfm->last_tx = 0; |
76c4290d | 337 | cfm->flap_count = 0; |
13b1b2ae EJ |
338 | atomic_init(&cfm->extended, false); |
339 | atomic_init(&cfm->check_tnl_key, false); | |
37bec3d3 | 340 | ovs_refcount_init(&cfm->ref_cnt); |
13b1b2ae EJ |
341 | |
342 | ovs_mutex_lock(&mutex); | |
343 | cfm_generate_maid(cfm); | |
344 | hmap_insert(all_cfms, &cfm->hmap_node, hash_string(cfm->name, 0)); | |
345 | ovs_mutex_unlock(&mutex); | |
b31bcf60 EJ |
346 | return cfm; |
347 | } | |
348 | ||
349 | void | |
13b1b2ae | 350 | cfm_unref(struct cfm *cfm) OVS_EXCLUDED(mutex) |
b31bcf60 EJ |
351 | { |
352 | struct remote_mp *rmp, *rmp_next; | |
b31bcf60 EJ |
353 | |
354 | if (!cfm) { | |
355 | return; | |
356 | } | |
357 | ||
37bec3d3 | 358 | if (ovs_refcount_unref(&cfm->ref_cnt) != 1) { |
8e9a73fa EJ |
359 | return; |
360 | } | |
361 | ||
13b1b2ae EJ |
362 | ovs_mutex_lock(&mutex); |
363 | hmap_remove(all_cfms, &cfm->hmap_node); | |
364 | ovs_mutex_unlock(&mutex); | |
365 | ||
a5610457 EJ |
366 | HMAP_FOR_EACH_SAFE (rmp, rmp_next, node, &cfm->remote_mps) { |
367 | hmap_remove(&cfm->remote_mps, &rmp->node); | |
b31bcf60 EJ |
368 | free(rmp); |
369 | } | |
370 | ||
a5610457 | 371 | hmap_destroy(&cfm->remote_mps); |
90967e95 | 372 | netdev_close(cfm->netdev); |
1de11730 | 373 | free(cfm->rmps_array); |
c5f81b20 | 374 | |
a5610457 | 375 | free(cfm); |
b31bcf60 EJ |
376 | } |
377 | ||
8e9a73fa EJ |
378 | struct cfm * |
379 | cfm_ref(const struct cfm *cfm_) | |
380 | { | |
381 | struct cfm *cfm = CONST_CAST(struct cfm *, cfm_); | |
382 | if (cfm) { | |
37bec3d3 | 383 | ovs_refcount_ref(&cfm->ref_cnt); |
8e9a73fa EJ |
384 | } |
385 | return cfm; | |
386 | } | |
387 | ||
a58727fb EJ |
388 | /* Should be run periodically to update fault statistics messages. */ |
389 | void | |
13b1b2ae | 390 | cfm_run(struct cfm *cfm) OVS_EXCLUDED(mutex) |
b31bcf60 | 391 | { |
13b1b2ae | 392 | ovs_mutex_lock(&mutex); |
a5610457 EJ |
393 | if (timer_expired(&cfm->fault_timer)) { |
394 | long long int interval = cfm_fault_interval(cfm); | |
144216a3 | 395 | struct remote_mp *rmp, *rmp_next; |
8210113e | 396 | bool old_cfm_fault = cfm->fault; |
f23d157c | 397 | bool old_rmp_opup = cfm->remote_opup; |
90967e95 | 398 | bool demand_override; |
016953ae PI |
399 | bool rmp_set_opup = false; |
400 | bool rmp_set_opdown = false; | |
b31bcf60 | 401 | |
b9380396 EJ |
402 | cfm->fault = cfm->recv_fault; |
403 | cfm->recv_fault = 0; | |
e14749fa | 404 | |
1de11730 EJ |
405 | cfm->rmps_array_len = 0; |
406 | free(cfm->rmps_array); | |
407 | cfm->rmps_array = xmalloc(hmap_count(&cfm->remote_mps) * | |
408 | sizeof *cfm->rmps_array); | |
409 | ||
3967a833 MM |
410 | if (cfm->health_interval == CFM_HEALTH_INTERVAL) { |
411 | /* Calculate the cfm health of the interface. If the number of | |
412 | * remote_mpids of a cfm interface is > 1, the cfm health is | |
413 | * undefined. If the number of remote_mpids is 1, the cfm health is | |
414 | * the percentage of the ccm frames received in the | |
415 | * (CFM_HEALTH_INTERVAL * 3.5)ms, else it is 0. */ | |
416 | if (hmap_count(&cfm->remote_mps) > 1) { | |
417 | cfm->health = -1; | |
418 | } else if (hmap_is_empty(&cfm->remote_mps)) { | |
419 | cfm->health = 0; | |
420 | } else { | |
421 | int exp_ccm_recvd; | |
f23d157c | 422 | int old_health = cfm->health; |
3967a833 MM |
423 | |
424 | rmp = CONTAINER_OF(hmap_first(&cfm->remote_mps), | |
425 | struct remote_mp, node); | |
426 | exp_ccm_recvd = (CFM_HEALTH_INTERVAL * 7) / 2; | |
427 | /* Calculate the percentage of healthy ccm frames received. | |
428 | * Since the 'fault_interval' is (3.5 * cfm_interval), and | |
429 | * 1 CCM packet must be received every cfm_interval, | |
430 | * the 'remote_mpid' health reports the percentage of | |
431 | * healthy CCM frames received every | |
432 | * 'CFM_HEALTH_INTERVAL'th 'fault_interval'. */ | |
433 | cfm->health = (rmp->num_health_ccm * 100) / exp_ccm_recvd; | |
434 | cfm->health = MIN(cfm->health, 100); | |
435 | rmp->num_health_ccm = 0; | |
cb22974d | 436 | ovs_assert(cfm->health >= 0 && cfm->health <= 100); |
f23d157c JS |
437 | |
438 | if (cfm->health != old_health) { | |
439 | seq_change(connectivity_seq_get()); | |
440 | } | |
3967a833 MM |
441 | } |
442 | cfm->health_interval = 0; | |
443 | } | |
444 | cfm->health_interval++; | |
445 | ||
90967e95 EJ |
446 | demand_override = false; |
447 | if (cfm->demand) { | |
448 | uint64_t rx_packets = cfm_rx_packets(cfm); | |
449 | demand_override = hmap_count(&cfm->remote_mps) == 1 | |
450 | && rx_packets > cfm->rx_packets; | |
451 | cfm->rx_packets = rx_packets; | |
452 | } | |
6fabb78d | 453 | |
90967e95 | 454 | HMAP_FOR_EACH_SAFE (rmp, rmp_next, node, &cfm->remote_mps) { |
144216a3 | 455 | if (!rmp->recv) { |
c3f72482 EJ |
456 | VLOG_INFO("%s: Received no CCM from RMP %"PRIu64" in the last" |
457 | " %lldms", cfm->name, rmp->mpid, | |
458 | time_msec() - rmp->last_rx); | |
90967e95 EJ |
459 | if (!demand_override) { |
460 | hmap_remove(&cfm->remote_mps, &rmp->node); | |
461 | free(rmp); | |
462 | } | |
144216a3 EJ |
463 | } else { |
464 | rmp->recv = false; | |
465 | ||
016953ae PI |
466 | if (rmp->opup) { |
467 | rmp_set_opup = true; | |
468 | } else { | |
469 | rmp_set_opdown = true; | |
86dc6501 EJ |
470 | } |
471 | ||
1de11730 | 472 | cfm->rmps_array[cfm->rmps_array_len++] = rmp->mpid; |
6fabb78d | 473 | } |
b31bcf60 EJ |
474 | } |
475 | ||
016953ae PI |
476 | if (rmp_set_opdown) { |
477 | cfm->remote_opup = false; | |
478 | } | |
479 | else if (rmp_set_opup) { | |
480 | cfm->remote_opup = true; | |
481 | } | |
482 | ||
f23d157c JS |
483 | if (old_rmp_opup != cfm->remote_opup) { |
484 | seq_change(connectivity_seq_get()); | |
485 | } | |
486 | ||
144216a3 | 487 | if (hmap_is_empty(&cfm->remote_mps)) { |
b9380396 | 488 | cfm->fault |= CFM_FAULT_RECV; |
dd986e09 EJ |
489 | } |
490 | ||
fb668e3a JS |
491 | if (old_cfm_fault != cfm->fault) { |
492 | if (!VLOG_DROP_INFO(&rl)) { | |
493 | struct ds ds = DS_EMPTY_INITIALIZER; | |
494 | ||
495 | ds_put_cstr(&ds, "from ["); | |
496 | ds_put_cfm_fault(&ds, old_cfm_fault); | |
497 | ds_put_cstr(&ds, "] to ["); | |
498 | ds_put_cfm_fault(&ds, cfm->fault); | |
499 | ds_put_char(&ds, ']'); | |
500 | VLOG_INFO("%s: CFM faults changed %s.", cfm->name, ds_cstr(&ds)); | |
501 | ds_destroy(&ds); | |
502 | } | |
76c4290d AW |
503 | |
504 | /* If there is a flap, increments the counter. */ | |
505 | if (old_cfm_fault == false || cfm->fault == false) { | |
506 | cfm->flap_count++; | |
507 | } | |
f23d157c JS |
508 | |
509 | seq_change(connectivity_seq_get()); | |
8210113e EJ |
510 | } |
511 | ||
0d0c0bb5 | 512 | cfm->booted = true; |
a5610457 | 513 | timer_set_duration(&cfm->fault_timer, interval); |
2f478344 | 514 | VLOG_DBG("%s: new fault interval", cfm->name); |
b31bcf60 | 515 | } |
13b1b2ae | 516 | ovs_mutex_unlock(&mutex); |
a58727fb | 517 | } |
b31bcf60 | 518 | |
a58727fb EJ |
519 | /* Should be run periodically to check if the CFM module has a CCM message it |
520 | * wishes to send. */ | |
521 | bool | |
13b1b2ae | 522 | cfm_should_send_ccm(struct cfm *cfm) OVS_EXCLUDED(mutex) |
a58727fb | 523 | { |
13b1b2ae EJ |
524 | bool ret; |
525 | ||
526 | ovs_mutex_lock(&mutex); | |
527 | ret = timer_expired(&cfm->tx_timer); | |
528 | ovs_mutex_unlock(&mutex); | |
529 | return ret; | |
a58727fb EJ |
530 | } |
531 | ||
c0a2e71d | 532 | /* Composes a CCM message into 'packet'. Messages generated with this function |
a58727fb EJ |
533 | * should be sent whenever cfm_should_send_ccm() indicates. */ |
534 | void | |
c0a2e71d | 535 | cfm_compose_ccm(struct cfm *cfm, struct ofpbuf *packet, |
13b1b2ae | 536 | uint8_t eth_src[ETH_ADDR_LEN]) OVS_EXCLUDED(mutex) |
a58727fb | 537 | { |
189cb9e4 | 538 | uint16_t ccm_vlan; |
c0a2e71d | 539 | struct ccm *ccm; |
13b1b2ae | 540 | bool extended; |
c0a2e71d | 541 | |
13b1b2ae | 542 | ovs_mutex_lock(&mutex); |
a5610457 | 543 | timer_set_duration(&cfm->tx_timer, cfm->ccm_interval_ms); |
75a4ead1 EJ |
544 | eth_compose(packet, cfm_ccm_addr(cfm), eth_src, ETH_TYPE_CFM, sizeof *ccm); |
545 | ||
189cb9e4 EJ |
546 | ccm_vlan = (cfm->ccm_vlan != CFM_RANDOM_VLAN |
547 | ? cfm->ccm_vlan | |
548 | : random_uint16()); | |
549 | ccm_vlan = ccm_vlan & VLAN_VID_MASK; | |
550 | ||
551 | if (ccm_vlan || cfm->ccm_pcp) { | |
552 | uint16_t tci = ccm_vlan | (cfm->ccm_pcp << VLAN_PCP_SHIFT); | |
1bf02876 | 553 | eth_push_vlan(packet, htons(ETH_TYPE_VLAN), htons(tci)); |
75a4ead1 EJ |
554 | } |
555 | ||
556 | ccm = packet->l3; | |
a58727fb EJ |
557 | ccm->mdlevel_version = 0; |
558 | ccm->opcode = CCM_OPCODE; | |
559 | ccm->tlv_offset = 70; | |
a5610457 | 560 | ccm->seq = htonl(++cfm->seq); |
a5610457 EJ |
561 | ccm->flags = cfm->ccm_interval; |
562 | memcpy(ccm->maid, cfm->maid, sizeof ccm->maid); | |
56717eb1 | 563 | memset(ccm->zero, 0, sizeof ccm->zero); |
ce27cbee | 564 | ccm->end_tlv = 0; |
aa62994c | 565 | |
13b1b2ae EJ |
566 | atomic_read(&cfm->extended, &extended); |
567 | if (extended) { | |
348f01e3 EJ |
568 | ccm->mpid = htons(hash_mpid(cfm->mpid)); |
569 | ccm->mpid64 = htonll(cfm->mpid); | |
86dc6501 | 570 | ccm->opdown = !cfm->opup; |
348f01e3 EJ |
571 | } else { |
572 | ccm->mpid = htons(cfm->mpid); | |
573 | ccm->mpid64 = htonll(0); | |
86dc6501 | 574 | ccm->opdown = 0; |
348f01e3 EJ |
575 | } |
576 | ||
de724029 | 577 | if (cfm->ccm_interval == 0) { |
13b1b2ae | 578 | ovs_assert(extended); |
de724029 | 579 | ccm->interval_ms_x = htons(cfm->ccm_interval_ms); |
d2859659 BP |
580 | } else { |
581 | ccm->interval_ms_x = htons(0); | |
de724029 EJ |
582 | } |
583 | ||
0d0c0bb5 | 584 | if (cfm->booted && hmap_is_empty(&cfm->remote_mps)) { |
aa62994c EJ |
585 | ccm->flags |= CCM_RDI_MASK; |
586 | } | |
b03c6f99 EJ |
587 | |
588 | if (cfm->last_tx) { | |
589 | long long int delay = time_msec() - cfm->last_tx; | |
590 | if (delay > (cfm->ccm_interval_ms * 3 / 2)) { | |
591 | VLOG_WARN("%s: long delay of %lldms (expected %dms) sending CCM" | |
592 | " seq %"PRIu32, cfm->name, delay, cfm->ccm_interval_ms, | |
593 | cfm->seq); | |
594 | } | |
595 | } | |
596 | cfm->last_tx = time_msec(); | |
13b1b2ae | 597 | ovs_mutex_unlock(&mutex); |
b31bcf60 EJ |
598 | } |
599 | ||
600 | void | |
13b1b2ae | 601 | cfm_wait(struct cfm *cfm) OVS_EXCLUDED(mutex) |
b31bcf60 | 602 | { |
526d174a AW |
603 | poll_timer_wait_until(cfm_wake_time(cfm)); |
604 | } | |
605 | ||
606 | ||
607 | /* Returns the next cfm wakeup time. */ | |
608 | long long int | |
609 | cfm_wake_time(struct cfm *cfm) OVS_EXCLUDED(mutex) | |
610 | { | |
611 | long long int retval; | |
612 | ||
613 | if (!cfm) { | |
614 | return LLONG_MAX; | |
615 | } | |
616 | ||
13b1b2ae | 617 | ovs_mutex_lock(&mutex); |
526d174a | 618 | retval = MIN(cfm->tx_timer.t, cfm->fault_timer.t); |
13b1b2ae | 619 | ovs_mutex_unlock(&mutex); |
526d174a | 620 | return retval; |
b31bcf60 EJ |
621 | } |
622 | ||
526d174a | 623 | |
a5610457 | 624 | /* Configures 'cfm' with settings from 's'. */ |
b31bcf60 | 625 | bool |
a5610457 | 626 | cfm_configure(struct cfm *cfm, const struct cfm_settings *s) |
13b1b2ae | 627 | OVS_EXCLUDED(mutex) |
b31bcf60 | 628 | { |
9aa952b2 | 629 | uint8_t interval; |
de724029 | 630 | int interval_ms; |
b31bcf60 | 631 | |
348f01e3 | 632 | if (!cfm_is_valid_mpid(s->extended, s->mpid) || s->interval <= 0) { |
b31bcf60 EJ |
633 | return false; |
634 | } | |
635 | ||
13b1b2ae | 636 | ovs_mutex_lock(&mutex); |
a5610457 | 637 | cfm->mpid = s->mpid; |
86dc6501 | 638 | cfm->opup = s->opup; |
a5610457 | 639 | interval = ms_to_ccm_interval(s->interval); |
de724029 EJ |
640 | interval_ms = ccm_interval_to_ms(interval); |
641 | ||
13b1b2ae EJ |
642 | atomic_store(&cfm->check_tnl_key, s->check_tnl_key); |
643 | atomic_store(&cfm->extended, s->extended); | |
644 | ||
189cb9e4 | 645 | cfm->ccm_vlan = s->ccm_vlan; |
a7aa2d3c | 646 | cfm->ccm_pcp = s->ccm_pcp & (VLAN_PCP_MASK >> VLAN_PCP_SHIFT); |
13b1b2ae | 647 | if (s->extended && interval_ms != s->interval) { |
de724029 EJ |
648 | interval = 0; |
649 | interval_ms = MIN(s->interval, UINT16_MAX); | |
650 | } | |
9aa952b2 | 651 | |
13b1b2ae | 652 | if (s->extended && s->demand) { |
90967e95 EJ |
653 | if (!cfm->demand) { |
654 | cfm->demand = true; | |
655 | cfm->rx_packets = cfm_rx_packets(cfm); | |
656 | } | |
657 | } else { | |
658 | cfm->demand = false; | |
659 | } | |
660 | ||
de724029 | 661 | if (interval != cfm->ccm_interval || interval_ms != cfm->ccm_interval_ms) { |
a5610457 | 662 | cfm->ccm_interval = interval; |
de724029 | 663 | cfm->ccm_interval_ms = interval_ms; |
b31bcf60 | 664 | |
a5610457 EJ |
665 | timer_set_expired(&cfm->tx_timer); |
666 | timer_set_duration(&cfm->fault_timer, cfm_fault_interval(cfm)); | |
667 | } | |
b31bcf60 | 668 | |
13b1b2ae | 669 | ovs_mutex_unlock(&mutex); |
a5610457 | 670 | return true; |
b31bcf60 EJ |
671 | } |
672 | ||
9d46b444 EJ |
673 | /* Must be called when the netdev owned by 'cfm' should change. */ |
674 | void | |
675 | cfm_set_netdev(struct cfm *cfm, const struct netdev *netdev) | |
13b1b2ae | 676 | OVS_EXCLUDED(mutex) |
9d46b444 | 677 | { |
13b1b2ae | 678 | ovs_mutex_lock(&mutex); |
9d46b444 EJ |
679 | if (cfm->netdev != netdev) { |
680 | netdev_close(cfm->netdev); | |
681 | cfm->netdev = netdev_ref(netdev); | |
682 | } | |
13b1b2ae | 683 | ovs_mutex_unlock(&mutex); |
9d46b444 EJ |
684 | } |
685 | ||
642dc74d JP |
686 | /* Returns true if 'cfm' should process packets from 'flow'. Sets |
687 | * fields in 'wc' that were used to make the determination. */ | |
b31bcf60 | 688 | bool |
5675cb4c | 689 | cfm_should_process_flow(const struct cfm *cfm_, const struct flow *flow, |
642dc74d | 690 | struct flow_wildcards *wc) |
b31bcf60 | 691 | { |
5675cb4c | 692 | struct cfm *cfm = CONST_CAST(struct cfm *, cfm_); |
13b1b2ae EJ |
693 | bool check_tnl_key; |
694 | ||
695 | atomic_read(&cfm->check_tnl_key, &check_tnl_key); | |
642dc74d | 696 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); |
13b1b2ae | 697 | if (check_tnl_key) { |
642dc74d JP |
698 | memset(&wc->masks.tunnel.tun_id, 0xff, sizeof wc->masks.tunnel.tun_id); |
699 | } | |
b31bcf60 | 700 | return (ntohs(flow->dl_type) == ETH_TYPE_CFM |
b363bae4 | 701 | && eth_addr_equals(flow->dl_dst, cfm_ccm_addr(cfm)) |
13b1b2ae | 702 | && (!check_tnl_key || flow->tunnel.tun_id == htonll(0))); |
b31bcf60 EJ |
703 | } |
704 | ||
705 | /* Updates internal statistics relevant to packet 'p'. Should be called on | |
706 | * every packet whose flow returned true when passed to | |
707 | * cfm_should_process_flow. */ | |
708 | void | |
709 | cfm_process_heartbeat(struct cfm *cfm, const struct ofpbuf *p) | |
13b1b2ae | 710 | OVS_EXCLUDED(mutex) |
b31bcf60 EJ |
711 | { |
712 | struct ccm *ccm; | |
0dd17bfd | 713 | struct eth_header *eth; |
b31bcf60 | 714 | |
13b1b2ae EJ |
715 | ovs_mutex_lock(&mutex); |
716 | ||
0dd17bfd | 717 | eth = p->l2; |
ce27cbee | 718 | ccm = ofpbuf_at(p, (uint8_t *)p->l3 - (uint8_t *)p->data, CCM_ACCEPT_LEN); |
b31bcf60 EJ |
719 | |
720 | if (!ccm) { | |
32977975 EJ |
721 | VLOG_INFO_RL(&rl, "%s: Received an unparseable 802.1ag CCM heartbeat.", |
722 | cfm->name); | |
13b1b2ae | 723 | goto out; |
b31bcf60 EJ |
724 | } |
725 | ||
726 | if (ccm->opcode != CCM_OPCODE) { | |
32977975 EJ |
727 | VLOG_INFO_RL(&rl, "%s: Received an unsupported 802.1ag message. " |
728 | "(opcode %u)", cfm->name, ccm->opcode); | |
13b1b2ae | 729 | goto out; |
b31bcf60 EJ |
730 | } |
731 | ||
5e809322 | 732 | /* According to the 802.1ag specification, reception of a CCM with an |
aa7f1158 EJ |
733 | * incorrect ccm_interval, unexpected MAID, or unexpected MPID should |
734 | * trigger a fault. We ignore this requirement for several reasons. | |
5e809322 EJ |
735 | * |
736 | * Faults can cause a controller or Open vSwitch to make potentially | |
737 | * expensive changes to the network topology. It seems prudent to trigger | |
738 | * them judiciously, especially when CFM is used to check slave status of | |
739 | * bonds. Furthermore, faults can be maliciously triggered by crafting | |
2b540ecb | 740 | * unexpected CCMs. */ |
a5610457 | 741 | if (memcmp(ccm->maid, cfm->maid, sizeof ccm->maid)) { |
b9380396 | 742 | cfm->recv_fault |= CFM_FAULT_MAID; |
32977975 EJ |
743 | VLOG_WARN_RL(&rl, "%s: Received unexpected remote MAID from MAC " |
744 | ETH_ADDR_FMT, cfm->name, ETH_ADDR_ARGS(eth->eth_src)); | |
f805c4cc | 745 | } else { |
de724029 EJ |
746 | uint8_t ccm_interval = ccm->flags & 0x7; |
747 | bool ccm_rdi = ccm->flags & CCM_RDI_MASK; | |
748 | uint16_t ccm_interval_ms_x = ntohs(ccm->interval_ms_x); | |
749 | ||
750 | struct remote_mp *rmp; | |
348f01e3 | 751 | uint64_t ccm_mpid; |
8210113e | 752 | uint32_t ccm_seq; |
86dc6501 | 753 | bool ccm_opdown; |
13b1b2ae | 754 | bool extended; |
2b540ecb | 755 | enum cfm_fault_reason cfm_fault = 0; |
348f01e3 | 756 | |
13b1b2ae EJ |
757 | atomic_read(&cfm->extended, &extended); |
758 | if (extended) { | |
86dc6501 EJ |
759 | ccm_mpid = ntohll(ccm->mpid64); |
760 | ccm_opdown = ccm->opdown; | |
761 | } else { | |
762 | ccm_mpid = ntohs(ccm->mpid); | |
763 | ccm_opdown = false; | |
764 | } | |
8210113e | 765 | ccm_seq = ntohl(ccm->seq); |
b31bcf60 | 766 | |
144216a3 | 767 | if (ccm_interval != cfm->ccm_interval) { |
2b540ecb | 768 | VLOG_WARN_RL(&rl, "%s: received a CCM with an unexpected interval" |
348f01e3 | 769 | " (%"PRIu8") from RMP %"PRIu64, cfm->name, |
144216a3 EJ |
770 | ccm_interval, ccm_mpid); |
771 | } | |
b31bcf60 | 772 | |
13b1b2ae | 773 | if (extended && ccm_interval == 0 |
de724029 | 774 | && ccm_interval_ms_x != cfm->ccm_interval_ms) { |
2b540ecb | 775 | VLOG_WARN_RL(&rl, "%s: received a CCM with an unexpected extended" |
348f01e3 | 776 | " interval (%"PRIu16"ms) from RMP %"PRIu64, cfm->name, |
de724029 EJ |
777 | ccm_interval_ms_x, ccm_mpid); |
778 | } | |
779 | ||
144216a3 | 780 | rmp = lookup_remote_mp(cfm, ccm_mpid); |
86dc6501 EJ |
781 | if (!rmp) { |
782 | if (hmap_count(&cfm->remote_mps) < CFM_MAX_RMPS) { | |
8210113e | 783 | rmp = xzalloc(sizeof *rmp); |
86dc6501 EJ |
784 | hmap_insert(&cfm->remote_mps, &rmp->node, hash_mpid(ccm_mpid)); |
785 | } else { | |
2b540ecb | 786 | cfm_fault |= CFM_FAULT_OVERFLOW; |
86dc6501 EJ |
787 | VLOG_WARN_RL(&rl, |
788 | "%s: dropped CCM with MPID %"PRIu64" from MAC " | |
789 | ETH_ADDR_FMT, cfm->name, ccm_mpid, | |
790 | ETH_ADDR_ARGS(eth->eth_src)); | |
791 | } | |
792 | } | |
793 | ||
2b540ecb MM |
794 | if (ccm_rdi) { |
795 | cfm_fault |= CFM_FAULT_RDI; | |
796 | VLOG_DBG("%s: RDI bit flagged from RMP %"PRIu64, cfm->name, | |
66fb94b5 | 797 | ccm_mpid); |
2b540ecb MM |
798 | } |
799 | ||
8210113e EJ |
800 | VLOG_DBG("%s: received CCM (seq %"PRIu32") (mpid %"PRIu64")" |
801 | " (interval %"PRIu8") (RDI %s)", cfm->name, ccm_seq, | |
802 | ccm_mpid, ccm_interval, ccm_rdi ? "true" : "false"); | |
803 | ||
0dd17bfd | 804 | if (rmp) { |
2b540ecb MM |
805 | if (rmp->mpid == cfm->mpid) { |
806 | cfm_fault |= CFM_FAULT_LOOPBACK; | |
807 | VLOG_WARN_RL(&rl,"%s: received CCM with local MPID" | |
808 | " %"PRIu64, cfm->name, rmp->mpid); | |
809 | } | |
810 | ||
8210113e EJ |
811 | if (rmp->seq && ccm_seq != (rmp->seq + 1)) { |
812 | VLOG_WARN_RL(&rl, "%s: (mpid %"PRIu64") detected sequence" | |
813 | " numbers which indicate possible connectivity" | |
814 | " problems (previous %"PRIu32") (current %"PRIu32 | |
815 | ")", cfm->name, ccm_mpid, rmp->seq, ccm_seq); | |
816 | } | |
817 | ||
144216a3 | 818 | rmp->mpid = ccm_mpid; |
2b540ecb | 819 | if (!cfm_fault) { |
3967a833 MM |
820 | rmp->num_health_ccm++; |
821 | } | |
2b540ecb MM |
822 | rmp->recv = true; |
823 | cfm->recv_fault |= cfm_fault; | |
8210113e | 824 | rmp->seq = ccm_seq; |
86dc6501 | 825 | rmp->opup = !ccm_opdown; |
c3f72482 | 826 | rmp->last_rx = time_msec(); |
f805c4cc | 827 | } |
b31bcf60 | 828 | } |
13b1b2ae EJ |
829 | |
830 | out: | |
831 | ovs_mutex_unlock(&mutex); | |
b31bcf60 | 832 | } |
20c8e971 | 833 | |
13b1b2ae | 834 | static int |
bd3950dd | 835 | cfm_get_fault__(const struct cfm *cfm) OVS_REQUIRES(mutex) |
a5610457 | 836 | { |
d7243b93 | 837 | if (cfm->fault_override >= 0) { |
b9380396 | 838 | return cfm->fault_override ? CFM_FAULT_OVERRIDE : 0; |
d7243b93 | 839 | } |
a5610457 EJ |
840 | return cfm->fault; |
841 | } | |
842 | ||
13b1b2ae EJ |
843 | /* Gets the fault status of 'cfm'. Returns a bit mask of 'cfm_fault_reason's |
844 | * indicating the cause of the connectivity fault, or zero if there is no | |
845 | * fault. */ | |
846 | int | |
847 | cfm_get_fault(const struct cfm *cfm) OVS_EXCLUDED(mutex) | |
848 | { | |
849 | int fault; | |
850 | ||
851 | ovs_mutex_lock(&mutex); | |
852 | fault = cfm_get_fault__(cfm); | |
853 | ovs_mutex_unlock(&mutex); | |
854 | return fault; | |
855 | } | |
856 | ||
76c4290d AW |
857 | /* Gets the number of cfm fault flapping since start. */ |
858 | uint64_t | |
859 | cfm_get_flap_count(const struct cfm *cfm) OVS_EXCLUDED(mutex) | |
860 | { | |
861 | uint64_t flap_count; | |
862 | ovs_mutex_lock(&mutex); | |
863 | flap_count = cfm->flap_count; | |
864 | ovs_mutex_unlock(&mutex); | |
865 | return flap_count; | |
866 | } | |
867 | ||
3967a833 MM |
868 | /* Gets the health of 'cfm'. Returns an integer between 0 and 100 indicating |
869 | * the health of the link as a percentage of ccm frames received in | |
870 | * CFM_HEALTH_INTERVAL * 'fault_interval' if there is only 1 remote_mpid, | |
871 | * returns 0 if there are no remote_mpids, and returns -1 if there are more | |
872 | * than 1 remote_mpids. */ | |
873 | int | |
13b1b2ae | 874 | cfm_get_health(const struct cfm *cfm) OVS_EXCLUDED(mutex) |
3967a833 | 875 | { |
13b1b2ae EJ |
876 | int health; |
877 | ||
878 | ovs_mutex_lock(&mutex); | |
879 | health = cfm->health; | |
880 | ovs_mutex_unlock(&mutex); | |
881 | return health; | |
3967a833 MM |
882 | } |
883 | ||
86dc6501 EJ |
884 | /* Gets the operational state of 'cfm'. 'cfm' is considered operationally down |
885 | * if it has received a CCM with the operationally down bit set from any of its | |
4653c558 EJ |
886 | * remote maintenance points. Returns 1 if 'cfm' is operationally up, 0 if |
887 | * 'cfm' is operationally down, or -1 if 'cfm' has no operational state | |
888 | * (because it isn't in extended mode). */ | |
889 | int | |
5675cb4c | 890 | cfm_get_opup(const struct cfm *cfm_) OVS_EXCLUDED(mutex) |
86dc6501 | 891 | { |
5675cb4c | 892 | struct cfm *cfm = CONST_CAST(struct cfm *, cfm_); |
13b1b2ae EJ |
893 | bool extended; |
894 | int opup; | |
895 | ||
896 | ovs_mutex_lock(&mutex); | |
897 | atomic_read(&cfm->extended, &extended); | |
898 | opup = extended ? cfm->remote_opup : -1; | |
899 | ovs_mutex_unlock(&mutex); | |
900 | ||
901 | return opup; | |
86dc6501 EJ |
902 | } |
903 | ||
1de11730 EJ |
904 | /* Populates 'rmps' with an array of remote maintenance points reachable by |
905 | * 'cfm'. The number of remote maintenance points is written to 'n_rmps'. | |
906 | * 'cfm' retains ownership of the array written to 'rmps' */ | |
907 | void | |
13b1b2ae EJ |
908 | cfm_get_remote_mpids(const struct cfm *cfm, uint64_t **rmps, size_t *n_rmps) |
909 | OVS_EXCLUDED(mutex) | |
1de11730 | 910 | { |
13b1b2ae | 911 | ovs_mutex_lock(&mutex); |
95e22d67 | 912 | *rmps = xmemdup(cfm->rmps_array, cfm->rmps_array_len * sizeof **rmps); |
1de11730 | 913 | *n_rmps = cfm->rmps_array_len; |
13b1b2ae | 914 | ovs_mutex_unlock(&mutex); |
1de11730 EJ |
915 | } |
916 | ||
a5610457 | 917 | static struct cfm * |
344e21d4 | 918 | cfm_find(const char *name) OVS_REQUIRES(mutex) |
20c8e971 | 919 | { |
a5610457 | 920 | struct cfm *cfm; |
9ac3fce4 | 921 | |
13b1b2ae | 922 | HMAP_FOR_EACH_WITH_HASH (cfm, hmap_node, hash_string(name, 0), all_cfms) { |
6f629657 | 923 | if (!strcmp(cfm->name, name)) { |
a5610457 | 924 | return cfm; |
9ac3fce4 EJ |
925 | } |
926 | } | |
927 | return NULL; | |
928 | } | |
929 | ||
930 | static void | |
5675cb4c | 931 | cfm_print_details(struct ds *ds, struct cfm *cfm) OVS_REQUIRES(mutex) |
9ac3fce4 | 932 | { |
20c8e971 | 933 | struct remote_mp *rmp; |
13b1b2ae | 934 | bool extended; |
906bb3d0 | 935 | int fault; |
20c8e971 | 936 | |
13b1b2ae EJ |
937 | atomic_read(&cfm->extended, &extended); |
938 | ||
ae75dae3 | 939 | ds_put_format(ds, "---- %s ----\n", cfm->name); |
b9380396 | 940 | ds_put_format(ds, "MPID %"PRIu64":%s%s\n", cfm->mpid, |
13b1b2ae | 941 | extended ? " extended" : "", |
b9380396 EJ |
942 | cfm->fault_override >= 0 ? " fault_override" : ""); |
943 | ||
13b1b2ae | 944 | fault = cfm_get_fault__(cfm); |
906bb3d0 | 945 | if (fault) { |
c3f72482 EJ |
946 | ds_put_cstr(ds, "\tfault: "); |
947 | ds_put_cfm_fault(ds, fault); | |
b9380396 EJ |
948 | ds_put_cstr(ds, "\n"); |
949 | } | |
9ac3fce4 | 950 | |
3967a833 MM |
951 | if (cfm->health == -1) { |
952 | ds_put_format(ds, "\taverage health: undefined\n"); | |
953 | } else { | |
954 | ds_put_format(ds, "\taverage health: %d\n", cfm->health); | |
955 | } | |
86dc6501 EJ |
956 | ds_put_format(ds, "\topstate: %s\n", cfm->opup ? "up" : "down"); |
957 | ds_put_format(ds, "\tremote_opstate: %s\n", | |
958 | cfm->remote_opup ? "up" : "down"); | |
ae75dae3 JP |
959 | ds_put_format(ds, "\tinterval: %dms\n", cfm->ccm_interval_ms); |
960 | ds_put_format(ds, "\tnext CCM tx: %lldms\n", | |
a5610457 | 961 | timer_msecs_until_expired(&cfm->tx_timer)); |
ae75dae3 | 962 | ds_put_format(ds, "\tnext fault check: %lldms\n", |
a5610457 | 963 | timer_msecs_until_expired(&cfm->fault_timer)); |
20c8e971 | 964 | |
a5610457 | 965 | HMAP_FOR_EACH (rmp, node, &cfm->remote_mps) { |
2b540ecb | 966 | ds_put_format(ds, "Remote MPID %"PRIu64"\n", rmp->mpid); |
7593daa2 | 967 | ds_put_format(ds, "\trecv since check: %s\n", |
dd986e09 | 968 | rmp->recv ? "true" : "false"); |
86dc6501 | 969 | ds_put_format(ds, "\topstate: %s\n", rmp->opup? "up" : "down"); |
20c8e971 | 970 | } |
ae75dae3 JP |
971 | } |
972 | ||
973 | static void | |
0e15264f | 974 | cfm_unixctl_show(struct unixctl_conn *conn, int argc, const char *argv[], |
13b1b2ae | 975 | void *aux OVS_UNUSED) OVS_EXCLUDED(mutex) |
ae75dae3 JP |
976 | { |
977 | struct ds ds = DS_EMPTY_INITIALIZER; | |
5675cb4c | 978 | struct cfm *cfm; |
ae75dae3 | 979 | |
13b1b2ae | 980 | ovs_mutex_lock(&mutex); |
0e15264f BP |
981 | if (argc > 1) { |
982 | cfm = cfm_find(argv[1]); | |
ae75dae3 | 983 | if (!cfm) { |
bde9f75d | 984 | unixctl_command_reply_error(conn, "no such CFM object"); |
13b1b2ae | 985 | goto out; |
ae75dae3 JP |
986 | } |
987 | cfm_print_details(&ds, cfm); | |
988 | } else { | |
13b1b2ae | 989 | HMAP_FOR_EACH (cfm, hmap_node, all_cfms) { |
ae75dae3 JP |
990 | cfm_print_details(&ds, cfm); |
991 | } | |
992 | } | |
9ac3fce4 | 993 | |
bde9f75d | 994 | unixctl_command_reply(conn, ds_cstr(&ds)); |
9ac3fce4 | 995 | ds_destroy(&ds); |
13b1b2ae EJ |
996 | out: |
997 | ovs_mutex_unlock(&mutex); | |
20c8e971 | 998 | } |
d7243b93 EJ |
999 | |
1000 | static void | |
1001 | cfm_unixctl_set_fault(struct unixctl_conn *conn, int argc, const char *argv[], | |
13b1b2ae | 1002 | void *aux OVS_UNUSED) OVS_EXCLUDED(mutex) |
d7243b93 EJ |
1003 | { |
1004 | const char *fault_str = argv[argc - 1]; | |
1005 | int fault_override; | |
1006 | struct cfm *cfm; | |
1007 | ||
13b1b2ae | 1008 | ovs_mutex_lock(&mutex); |
d7243b93 EJ |
1009 | if (!strcasecmp("true", fault_str)) { |
1010 | fault_override = 1; | |
1011 | } else if (!strcasecmp("false", fault_str)) { | |
1012 | fault_override = 0; | |
1013 | } else if (!strcasecmp("normal", fault_str)) { | |
1014 | fault_override = -1; | |
1015 | } else { | |
bde9f75d | 1016 | unixctl_command_reply_error(conn, "unknown fault string"); |
13b1b2ae | 1017 | goto out; |
d7243b93 EJ |
1018 | } |
1019 | ||
1020 | if (argc > 2) { | |
1021 | cfm = cfm_find(argv[1]); | |
1022 | if (!cfm) { | |
bde9f75d | 1023 | unixctl_command_reply_error(conn, "no such CFM object"); |
13b1b2ae | 1024 | goto out; |
d7243b93 EJ |
1025 | } |
1026 | cfm->fault_override = fault_override; | |
1027 | } else { | |
13b1b2ae | 1028 | HMAP_FOR_EACH (cfm, hmap_node, all_cfms) { |
d7243b93 EJ |
1029 | cfm->fault_override = fault_override; |
1030 | } | |
1031 | } | |
1032 | ||
c95e2783 | 1033 | seq_change(connectivity_seq_get()); |
bde9f75d | 1034 | unixctl_command_reply(conn, "OK"); |
13b1b2ae EJ |
1035 | |
1036 | out: | |
1037 | ovs_mutex_unlock(&mutex); | |
d7243b93 | 1038 | } |