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b31bcf60 | 1 | /* |
0477baa9 | 2 | * Copyright (c) 2010, 2011, 2012, 2013, 2014, 2015 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" |
cf62fa4c | 26 | #include "dp-packet.h" |
3e8a2ad1 | 27 | #include "openvswitch/dynamic-string.h" |
b31bcf60 EJ |
28 | #include "flow.h" |
29 | #include "hash.h" | |
ee89ea7b | 30 | #include "openvswitch/hmap.h" |
90967e95 | 31 | #include "netdev.h" |
5617ae6a | 32 | #include "ovs-atomic.h" |
b31bcf60 | 33 | #include "packets.h" |
fd016ae3 | 34 | #include "openvswitch/poll-loop.h" |
189cb9e4 | 35 | #include "random.h" |
f23d157c | 36 | #include "seq.h" |
6fabb78d | 37 | #include "timer.h" |
b31bcf60 | 38 | #include "timeval.h" |
9ac3fce4 | 39 | #include "unixctl.h" |
e6211adc | 40 | #include "openvswitch/vlog.h" |
ee89ea7b | 41 | #include "util.h" |
b31bcf60 EJ |
42 | |
43 | VLOG_DEFINE_THIS_MODULE(cfm); | |
44 | ||
144216a3 EJ |
45 | #define CFM_MAX_RMPS 256 |
46 | ||
c0a2e71d | 47 | /* Ethernet destination address of CCM packets. */ |
134fefa4 BP |
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); | |
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 | |
7e2b277b JR |
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. */ | |
13b1b2ae EJ |
134 | atomic_bool check_tnl_key; /* Verify the tunnel key of inbound packets? */ |
135 | atomic_bool extended; /* Extended mode. */ | |
37bec3d3 | 136 | struct ovs_refcount ref_cnt; |
76c4290d AW |
137 | |
138 | uint64_t flap_count; /* Count the flaps since boot. */ | |
88bf179a AW |
139 | |
140 | /* True when the variables returned by cfm_get_*() are changed | |
141 | * since last check. */ | |
142 | bool status_changed; | |
5767a79a AW |
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; | |
93b8df38 EJ |
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 { | |
348f01e3 | 153 | uint64_t mpid; /* The Maintenance Point ID of this 'remote_mp'. */ |
93b8df38 EJ |
154 | struct hmap_node node; /* Node in 'remote_mps' map. */ |
155 | ||
156 | bool recv; /* CCM was received since last fault check. */ | |
86dc6501 | 157 | bool opup; /* Operational State. */ |
8210113e | 158 | uint32_t seq; /* Most recently received sequence number. */ |
3967a833 MM |
159 | uint8_t num_health_ccm; /* Number of received ccm frames every |
160 | CFM_HEALTH_INTERVAL * 'fault_interval'. */ | |
c3f72482 | 161 | long long int last_rx; /* Last CCM reception time. */ |
3967a833 | 162 | |
b31bcf60 EJ |
163 | }; |
164 | ||
8210113e | 165 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(20, 30); |
13b1b2ae EJ |
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__; | |
9ac3fce4 | 170 | |
0e15264f | 171 | static unixctl_cb_func cfm_unixctl_show; |
d7243b93 | 172 | static unixctl_cb_func cfm_unixctl_set_fault; |
dd986e09 | 173 | |
90967e95 | 174 | static uint64_t |
bd3950dd | 175 | cfm_rx_packets(const struct cfm *cfm) OVS_REQUIRES(mutex) |
90967e95 EJ |
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 | ||
74ff3298 | 186 | static struct eth_addr |
5675cb4c | 187 | cfm_ccm_addr(struct cfm *cfm) |
ef9819b5 | 188 | { |
13b1b2ae | 189 | bool extended; |
7e2b277b JR |
190 | |
191 | atomic_read_relaxed(&cfm->extended, &extended); | |
192 | ||
13b1b2ae | 193 | return extended ? eth_addr_ccm_x : eth_addr_ccm; |
ef9819b5 EJ |
194 | } |
195 | ||
b9380396 EJ |
196 | /* Returns the string representation of the given cfm_fault_reason 'reason'. */ |
197 | const char * | |
13b1b2ae EJ |
198 | cfm_fault_reason_to_str(int reason) |
199 | { | |
b9380396 EJ |
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 | |
c3f72482 | 209 | ds_put_cfm_fault(struct ds *ds, int fault) |
b9380396 | 210 | { |
b9380396 EJ |
211 | int i; |
212 | ||
213 | for (i = 0; i < CFM_FAULT_N_REASONS; i++) { | |
214 | int reason = 1 << i; | |
215 | ||
c3f72482 EJ |
216 | if (fault & reason) { |
217 | ds_put_format(ds, "%s ", cfm_fault_reason_to_str(reason)); | |
b9380396 EJ |
218 | } |
219 | } | |
c3f72482 EJ |
220 | |
221 | ds_chomp(ds, ' '); | |
b9380396 EJ |
222 | } |
223 | ||
84c5d450 | 224 | static void |
bd3950dd | 225 | cfm_generate_maid(struct cfm *cfm) OVS_REQUIRES(mutex) |
84c5d450 | 226 | { |
db16e36e EJ |
227 | const char *ovs_md_name = "ovs"; |
228 | const char *ovs_ma_name = "ovs"; | |
84c5d450 EJ |
229 | uint8_t *ma_p; |
230 | size_t md_len, ma_len; | |
231 | ||
a5610457 | 232 | memset(cfm->maid, 0, CCM_MAID_LEN); |
84c5d450 EJ |
233 | |
234 | md_len = strlen(ovs_md_name); | |
235 | ma_len = strlen(ovs_ma_name); | |
236 | ||
cb22974d | 237 | ovs_assert(md_len && ma_len && md_len + ma_len + 4 <= CCM_MAID_LEN); |
84c5d450 | 238 | |
a5610457 EJ |
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. */ | |
84c5d450 | 242 | |
a5610457 | 243 | ma_p = cfm->maid + 2 + md_len; |
84c5d450 EJ |
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 | ||
b31bcf60 EJ |
249 | static int |
250 | ccm_interval_to_ms(uint8_t interval) | |
251 | { | |
252 | switch (interval) { | |
428b2edd | 253 | case 0: OVS_NOT_REACHED(); /* Explicitly not supported by 802.1ag. */ |
b31bcf60 EJ |
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; | |
428b2edd | 261 | default: OVS_NOT_REACHED(); /* Explicitly not supported by 802.1ag. */ |
b31bcf60 EJ |
262 | } |
263 | ||
428b2edd | 264 | OVS_NOT_REACHED(); |
b31bcf60 EJ |
265 | } |
266 | ||
aac19178 | 267 | static long long int |
bd3950dd | 268 | cfm_fault_interval(struct cfm *cfm) OVS_REQUIRES(mutex) |
aac19178 EJ |
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 | * | |
03f209ba AW |
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; | |
aac19178 EJ |
283 | } |
284 | ||
b31bcf60 EJ |
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 | ||
b31bcf60 | 299 | static uint32_t |
348f01e3 | 300 | hash_mpid(uint64_t mpid) |
b31bcf60 | 301 | { |
965607c8 | 302 | return hash_uint64(mpid); |
b31bcf60 EJ |
303 | } |
304 | ||
305 | static bool | |
348f01e3 | 306 | cfm_is_valid_mpid(bool extended, uint64_t mpid) |
b31bcf60 | 307 | { |
348f01e3 EJ |
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); | |
b31bcf60 EJ |
311 | } |
312 | ||
313 | static struct remote_mp * | |
bd3950dd | 314 | lookup_remote_mp(const struct cfm *cfm, uint64_t mpid) OVS_REQUIRES(mutex) |
b31bcf60 EJ |
315 | { |
316 | struct remote_mp *rmp; | |
317 | ||
144216a3 | 318 | HMAP_FOR_EACH_IN_BUCKET (rmp, node, hash_mpid(mpid), &cfm->remote_mps) { |
b31bcf60 EJ |
319 | if (rmp->mpid == mpid) { |
320 | return rmp; | |
321 | } | |
322 | } | |
323 | ||
324 | return NULL; | |
325 | } | |
326 | ||
9ac3fce4 EJ |
327 | void |
328 | cfm_init(void) | |
329 | { | |
0e15264f | 330 | unixctl_command_register("cfm/show", "[interface]", 0, 1, cfm_unixctl_show, |
ae75dae3 | 331 | NULL); |
d7243b93 EJ |
332 | unixctl_command_register("cfm/set-fault", "[interface] normal|false|true", |
333 | 1, 2, cfm_unixctl_set_fault, NULL); | |
9ac3fce4 EJ |
334 | } |
335 | ||
7fcd0037 AW |
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 | ||
6f629657 EJ |
344 | /* Allocates a 'cfm' object called 'name'. 'cfm' should be initialized by |
345 | * cfm_configure() before use. */ | |
b31bcf60 | 346 | struct cfm * |
13b1b2ae | 347 | cfm_create(const struct netdev *netdev) OVS_EXCLUDED(mutex) |
b31bcf60 EJ |
348 | { |
349 | struct cfm *cfm; | |
b31bcf60 | 350 | |
a5610457 | 351 | cfm = xzalloc(sizeof *cfm); |
90967e95 EJ |
352 | cfm->netdev = netdev_ref(netdev); |
353 | cfm->name = netdev_get_name(cfm->netdev); | |
a5610457 | 354 | hmap_init(&cfm->remote_mps); |
86dc6501 | 355 | cfm->remote_opup = true; |
d7243b93 | 356 | cfm->fault_override = -1; |
3967a833 | 357 | cfm->health = -1; |
b03c6f99 | 358 | cfm->last_tx = 0; |
76c4290d | 359 | cfm->flap_count = 0; |
13b1b2ae EJ |
360 | atomic_init(&cfm->extended, false); |
361 | atomic_init(&cfm->check_tnl_key, false); | |
37bec3d3 | 362 | ovs_refcount_init(&cfm->ref_cnt); |
13b1b2ae EJ |
363 | |
364 | ovs_mutex_lock(&mutex); | |
7fcd0037 | 365 | cfm_status_changed(cfm); |
13b1b2ae EJ |
366 | cfm_generate_maid(cfm); |
367 | hmap_insert(all_cfms, &cfm->hmap_node, hash_string(cfm->name, 0)); | |
368 | ovs_mutex_unlock(&mutex); | |
88bf179a | 369 | |
b31bcf60 EJ |
370 | return cfm; |
371 | } | |
372 | ||
373 | void | |
13b1b2ae | 374 | cfm_unref(struct cfm *cfm) OVS_EXCLUDED(mutex) |
b31bcf60 | 375 | { |
4ec3d7c7 | 376 | struct remote_mp *rmp; |
b31bcf60 EJ |
377 | |
378 | if (!cfm) { | |
379 | return; | |
380 | } | |
381 | ||
24f83812 | 382 | if (ovs_refcount_unref_relaxed(&cfm->ref_cnt) != 1) { |
8e9a73fa EJ |
383 | return; |
384 | } | |
385 | ||
13b1b2ae | 386 | ovs_mutex_lock(&mutex); |
7fcd0037 | 387 | cfm_status_changed(cfm); |
13b1b2ae EJ |
388 | hmap_remove(all_cfms, &cfm->hmap_node); |
389 | ovs_mutex_unlock(&mutex); | |
390 | ||
4ec3d7c7 | 391 | HMAP_FOR_EACH_POP (rmp, node, &cfm->remote_mps) { |
b31bcf60 EJ |
392 | free(rmp); |
393 | } | |
394 | ||
a5610457 | 395 | hmap_destroy(&cfm->remote_mps); |
90967e95 | 396 | netdev_close(cfm->netdev); |
1de11730 | 397 | free(cfm->rmps_array); |
c5f81b20 | 398 | |
a5610457 | 399 | free(cfm); |
b31bcf60 EJ |
400 | } |
401 | ||
8e9a73fa EJ |
402 | struct cfm * |
403 | cfm_ref(const struct cfm *cfm_) | |
404 | { | |
405 | struct cfm *cfm = CONST_CAST(struct cfm *, cfm_); | |
406 | if (cfm) { | |
37bec3d3 | 407 | ovs_refcount_ref(&cfm->ref_cnt); |
8e9a73fa EJ |
408 | } |
409 | return cfm; | |
410 | } | |
411 | ||
a58727fb EJ |
412 | /* Should be run periodically to update fault statistics messages. */ |
413 | void | |
13b1b2ae | 414 | cfm_run(struct cfm *cfm) OVS_EXCLUDED(mutex) |
b31bcf60 | 415 | { |
13b1b2ae | 416 | ovs_mutex_lock(&mutex); |
a5610457 EJ |
417 | if (timer_expired(&cfm->fault_timer)) { |
418 | long long int interval = cfm_fault_interval(cfm); | |
144216a3 | 419 | struct remote_mp *rmp, *rmp_next; |
45756018 | 420 | enum cfm_fault_reason old_cfm_fault = cfm->fault; |
18dcfc56 AW |
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; | |
f23d157c | 425 | bool old_rmp_opup = cfm->remote_opup; |
90967e95 | 426 | bool demand_override; |
016953ae PI |
427 | bool rmp_set_opup = false; |
428 | bool rmp_set_opdown = false; | |
b31bcf60 | 429 | |
b9380396 EJ |
430 | cfm->fault = cfm->recv_fault; |
431 | cfm->recv_fault = 0; | |
e14749fa | 432 | |
1de11730 EJ |
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 | ||
3967a833 MM |
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; | |
cb22974d | 463 | ovs_assert(cfm->health >= 0 && cfm->health <= 100); |
3967a833 MM |
464 | } |
465 | cfm->health_interval = 0; | |
466 | } | |
467 | cfm->health_interval++; | |
468 | ||
90967e95 EJ |
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 | |
5767a79a AW |
473 | && rx_packets > cfm->rx_packets |
474 | && !timer_expired(&cfm->demand_rx_ccm_t); | |
90967e95 EJ |
475 | cfm->rx_packets = rx_packets; |
476 | } | |
6fabb78d | 477 | |
90967e95 | 478 | HMAP_FOR_EACH_SAFE (rmp, rmp_next, node, &cfm->remote_mps) { |
144216a3 | 479 | if (!rmp->recv) { |
c3f72482 EJ |
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); | |
90967e95 | 483 | if (!demand_override) { |
18dcfc56 | 484 | old_rmps_deleted = true; |
90967e95 EJ |
485 | hmap_remove(&cfm->remote_mps, &rmp->node); |
486 | free(rmp); | |
487 | } | |
144216a3 EJ |
488 | } else { |
489 | rmp->recv = false; | |
490 | ||
016953ae PI |
491 | if (rmp->opup) { |
492 | rmp_set_opup = true; | |
493 | } else { | |
494 | rmp_set_opdown = true; | |
86dc6501 EJ |
495 | } |
496 | ||
1de11730 | 497 | cfm->rmps_array[cfm->rmps_array_len++] = rmp->mpid; |
6fabb78d | 498 | } |
b31bcf60 EJ |
499 | } |
500 | ||
016953ae PI |
501 | if (rmp_set_opdown) { |
502 | cfm->remote_opup = false; | |
503 | } | |
504 | else if (rmp_set_opup) { | |
505 | cfm->remote_opup = true; | |
506 | } | |
507 | ||
144216a3 | 508 | if (hmap_is_empty(&cfm->remote_mps)) { |
b9380396 | 509 | cfm->fault |= CFM_FAULT_RECV; |
dd986e09 EJ |
510 | } |
511 | ||
fb668e3a JS |
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 | } | |
76c4290d AW |
524 | |
525 | /* If there is a flap, increments the counter. */ | |
45756018 | 526 | if (old_cfm_fault == 0 || cfm->fault == 0) { |
76c4290d AW |
527 | cfm->flap_count++; |
528 | } | |
18dcfc56 | 529 | } |
f23d157c | 530 | |
18dcfc56 AW |
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) { | |
88bf179a | 538 | cfm_status_changed(cfm); |
8210113e EJ |
539 | } |
540 | ||
0d0c0bb5 | 541 | cfm->booted = true; |
a5610457 | 542 | timer_set_duration(&cfm->fault_timer, interval); |
2f478344 | 543 | VLOG_DBG("%s: new fault interval", cfm->name); |
b31bcf60 | 544 | } |
13b1b2ae | 545 | ovs_mutex_unlock(&mutex); |
a58727fb | 546 | } |
b31bcf60 | 547 | |
a58727fb EJ |
548 | /* Should be run periodically to check if the CFM module has a CCM message it |
549 | * wishes to send. */ | |
550 | bool | |
13b1b2ae | 551 | cfm_should_send_ccm(struct cfm *cfm) OVS_EXCLUDED(mutex) |
a58727fb | 552 | { |
13b1b2ae EJ |
553 | bool ret; |
554 | ||
555 | ovs_mutex_lock(&mutex); | |
556 | ret = timer_expired(&cfm->tx_timer); | |
557 | ovs_mutex_unlock(&mutex); | |
558 | return ret; | |
a58727fb EJ |
559 | } |
560 | ||
c0a2e71d | 561 | /* Composes a CCM message into 'packet'. Messages generated with this function |
a58727fb EJ |
562 | * should be sent whenever cfm_should_send_ccm() indicates. */ |
563 | void | |
cf62fa4c | 564 | cfm_compose_ccm(struct cfm *cfm, struct dp_packet *packet, |
74ff3298 | 565 | const struct eth_addr eth_src) OVS_EXCLUDED(mutex) |
a58727fb | 566 | { |
189cb9e4 | 567 | uint16_t ccm_vlan; |
c0a2e71d | 568 | struct ccm *ccm; |
13b1b2ae | 569 | bool extended; |
c0a2e71d | 570 | |
13b1b2ae | 571 | ovs_mutex_lock(&mutex); |
a5610457 | 572 | timer_set_duration(&cfm->tx_timer, cfm->ccm_interval_ms); |
75a4ead1 EJ |
573 | eth_compose(packet, cfm_ccm_addr(cfm), eth_src, ETH_TYPE_CFM, sizeof *ccm); |
574 | ||
189cb9e4 EJ |
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); | |
1bf02876 | 582 | eth_push_vlan(packet, htons(ETH_TYPE_VLAN), htons(tci)); |
75a4ead1 EJ |
583 | } |
584 | ||
7e2b277b JR |
585 | atomic_read_relaxed(&cfm->extended, &extended); |
586 | ||
cf62fa4c | 587 | ccm = dp_packet_l3(packet); |
a58727fb EJ |
588 | ccm->mdlevel_version = 0; |
589 | ccm->opcode = CCM_OPCODE; | |
590 | ccm->tlv_offset = 70; | |
a5610457 | 591 | ccm->seq = htonl(++cfm->seq); |
a5610457 EJ |
592 | ccm->flags = cfm->ccm_interval; |
593 | memcpy(ccm->maid, cfm->maid, sizeof ccm->maid); | |
56717eb1 | 594 | memset(ccm->zero, 0, sizeof ccm->zero); |
ce27cbee | 595 | ccm->end_tlv = 0; |
aa62994c | 596 | |
13b1b2ae | 597 | if (extended) { |
348f01e3 EJ |
598 | ccm->mpid = htons(hash_mpid(cfm->mpid)); |
599 | ccm->mpid64 = htonll(cfm->mpid); | |
86dc6501 | 600 | ccm->opdown = !cfm->opup; |
348f01e3 EJ |
601 | } else { |
602 | ccm->mpid = htons(cfm->mpid); | |
603 | ccm->mpid64 = htonll(0); | |
86dc6501 | 604 | ccm->opdown = 0; |
348f01e3 EJ |
605 | } |
606 | ||
de724029 | 607 | if (cfm->ccm_interval == 0) { |
13b1b2ae | 608 | ovs_assert(extended); |
de724029 | 609 | ccm->interval_ms_x = htons(cfm->ccm_interval_ms); |
d2859659 BP |
610 | } else { |
611 | ccm->interval_ms_x = htons(0); | |
de724029 EJ |
612 | } |
613 | ||
0d0c0bb5 | 614 | if (cfm->booted && hmap_is_empty(&cfm->remote_mps)) { |
aa62994c EJ |
615 | ccm->flags |= CCM_RDI_MASK; |
616 | } | |
b03c6f99 EJ |
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)) { | |
df0e5f55 | 621 | VLOG_INFO("%s: long delay of %lldms (expected %dms) sending CCM" |
b03c6f99 EJ |
622 | " seq %"PRIu32, cfm->name, delay, cfm->ccm_interval_ms, |
623 | cfm->seq); | |
624 | } | |
625 | } | |
626 | cfm->last_tx = time_msec(); | |
13b1b2ae | 627 | ovs_mutex_unlock(&mutex); |
b31bcf60 EJ |
628 | } |
629 | ||
0477baa9 | 630 | long long int |
13b1b2ae | 631 | cfm_wait(struct cfm *cfm) OVS_EXCLUDED(mutex) |
b31bcf60 | 632 | { |
0477baa9 DF |
633 | long long int wake_time = cfm_wake_time(cfm); |
634 | poll_timer_wait_until(wake_time); | |
635 | return wake_time; | |
526d174a AW |
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 | ||
13b1b2ae | 649 | ovs_mutex_lock(&mutex); |
526d174a | 650 | retval = MIN(cfm->tx_timer.t, cfm->fault_timer.t); |
13b1b2ae | 651 | ovs_mutex_unlock(&mutex); |
526d174a | 652 | return retval; |
b31bcf60 EJ |
653 | } |
654 | ||
526d174a | 655 | |
a5610457 | 656 | /* Configures 'cfm' with settings from 's'. */ |
b31bcf60 | 657 | bool |
a5610457 | 658 | cfm_configure(struct cfm *cfm, const struct cfm_settings *s) |
13b1b2ae | 659 | OVS_EXCLUDED(mutex) |
b31bcf60 | 660 | { |
9aa952b2 | 661 | uint8_t interval; |
de724029 | 662 | int interval_ms; |
b31bcf60 | 663 | |
348f01e3 | 664 | if (!cfm_is_valid_mpid(s->extended, s->mpid) || s->interval <= 0) { |
b31bcf60 EJ |
665 | return false; |
666 | } | |
667 | ||
13b1b2ae | 668 | ovs_mutex_lock(&mutex); |
a5610457 | 669 | cfm->mpid = s->mpid; |
86dc6501 | 670 | cfm->opup = s->opup; |
a5610457 | 671 | interval = ms_to_ccm_interval(s->interval); |
de724029 EJ |
672 | interval_ms = ccm_interval_to_ms(interval); |
673 | ||
7e2b277b JR |
674 | atomic_store_relaxed(&cfm->check_tnl_key, s->check_tnl_key); |
675 | atomic_store_relaxed(&cfm->extended, s->extended); | |
13b1b2ae | 676 | |
189cb9e4 | 677 | cfm->ccm_vlan = s->ccm_vlan; |
a7aa2d3c | 678 | cfm->ccm_pcp = s->ccm_pcp & (VLAN_PCP_MASK >> VLAN_PCP_SHIFT); |
13b1b2ae | 679 | if (s->extended && interval_ms != s->interval) { |
de724029 EJ |
680 | interval = 0; |
681 | interval_ms = MIN(s->interval, UINT16_MAX); | |
682 | } | |
9aa952b2 | 683 | |
13b1b2ae | 684 | if (s->extended && s->demand) { |
90967e95 EJ |
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 | ||
de724029 | 693 | if (interval != cfm->ccm_interval || interval_ms != cfm->ccm_interval_ms) { |
a5610457 | 694 | cfm->ccm_interval = interval; |
de724029 | 695 | cfm->ccm_interval_ms = interval_ms; |
b31bcf60 | 696 | |
a5610457 EJ |
697 | timer_set_expired(&cfm->tx_timer); |
698 | timer_set_duration(&cfm->fault_timer, cfm_fault_interval(cfm)); | |
699 | } | |
b31bcf60 | 700 | |
13b1b2ae | 701 | ovs_mutex_unlock(&mutex); |
a5610457 | 702 | return true; |
b31bcf60 EJ |
703 | } |
704 | ||
9d46b444 EJ |
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) | |
13b1b2ae | 708 | OVS_EXCLUDED(mutex) |
9d46b444 | 709 | { |
13b1b2ae | 710 | ovs_mutex_lock(&mutex); |
9d46b444 EJ |
711 | if (cfm->netdev != netdev) { |
712 | netdev_close(cfm->netdev); | |
713 | cfm->netdev = netdev_ref(netdev); | |
714 | } | |
13b1b2ae | 715 | ovs_mutex_unlock(&mutex); |
9d46b444 EJ |
716 | } |
717 | ||
642dc74d JP |
718 | /* Returns true if 'cfm' should process packets from 'flow'. Sets |
719 | * fields in 'wc' that were used to make the determination. */ | |
b31bcf60 | 720 | bool |
5675cb4c | 721 | cfm_should_process_flow(const struct cfm *cfm_, const struct flow *flow, |
642dc74d | 722 | struct flow_wildcards *wc) |
b31bcf60 | 723 | { |
5675cb4c | 724 | struct cfm *cfm = CONST_CAST(struct cfm *, cfm_); |
13b1b2ae EJ |
725 | bool check_tnl_key; |
726 | ||
7e2b277b JR |
727 | /* Most packets are not CFM. */ |
728 | if (OVS_LIKELY(flow->dl_type != htons(ETH_TYPE_CFM))) { | |
729 | return false; | |
730 | } | |
731 | ||
642dc74d | 732 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); |
7e2b277b JR |
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 | ||
13b1b2ae | 739 | if (check_tnl_key) { |
642dc74d | 740 | memset(&wc->masks.tunnel.tun_id, 0xff, sizeof wc->masks.tunnel.tun_id); |
7e2b277b | 741 | return flow->tunnel.tun_id == htonll(0); |
642dc74d | 742 | } |
7e2b277b | 743 | return true; |
b31bcf60 EJ |
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 | |
cf62fa4c | 750 | cfm_process_heartbeat(struct cfm *cfm, const struct dp_packet *p) |
13b1b2ae | 751 | OVS_EXCLUDED(mutex) |
b31bcf60 EJ |
752 | { |
753 | struct ccm *ccm; | |
0dd17bfd | 754 | struct eth_header *eth; |
7e2b277b | 755 | bool extended; |
b31bcf60 | 756 | |
13b1b2ae EJ |
757 | ovs_mutex_lock(&mutex); |
758 | ||
7e2b277b JR |
759 | atomic_read_relaxed(&cfm->extended, &extended); |
760 | ||
2482b0b0 | 761 | eth = dp_packet_eth(p); |
cf62fa4c | 762 | ccm = dp_packet_at(p, (uint8_t *)dp_packet_l3(p) - (uint8_t *)dp_packet_data(p), |
437d0d22 | 763 | CCM_ACCEPT_LEN); |
b31bcf60 EJ |
764 | |
765 | if (!ccm) { | |
32977975 EJ |
766 | VLOG_INFO_RL(&rl, "%s: Received an unparseable 802.1ag CCM heartbeat.", |
767 | cfm->name); | |
13b1b2ae | 768 | goto out; |
b31bcf60 EJ |
769 | } |
770 | ||
771 | if (ccm->opcode != CCM_OPCODE) { | |
32977975 EJ |
772 | VLOG_INFO_RL(&rl, "%s: Received an unsupported 802.1ag message. " |
773 | "(opcode %u)", cfm->name, ccm->opcode); | |
13b1b2ae | 774 | goto out; |
b31bcf60 EJ |
775 | } |
776 | ||
5e809322 | 777 | /* According to the 802.1ag specification, reception of a CCM with an |
aa7f1158 EJ |
778 | * incorrect ccm_interval, unexpected MAID, or unexpected MPID should |
779 | * trigger a fault. We ignore this requirement for several reasons. | |
5e809322 EJ |
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 | |
91fc374a BP |
783 | * them judiciously, especially when CFM is used to check status of bond |
784 | * members. Furthermore, faults can be maliciously triggered by crafting | |
2b540ecb | 785 | * unexpected CCMs. */ |
a5610457 | 786 | if (memcmp(ccm->maid, cfm->maid, sizeof ccm->maid)) { |
b9380396 | 787 | cfm->recv_fault |= CFM_FAULT_MAID; |
32977975 EJ |
788 | VLOG_WARN_RL(&rl, "%s: Received unexpected remote MAID from MAC " |
789 | ETH_ADDR_FMT, cfm->name, ETH_ADDR_ARGS(eth->eth_src)); | |
f805c4cc | 790 | } else { |
de724029 EJ |
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; | |
348f01e3 | 796 | uint64_t ccm_mpid; |
8210113e | 797 | uint32_t ccm_seq; |
86dc6501 | 798 | bool ccm_opdown; |
2b540ecb | 799 | enum cfm_fault_reason cfm_fault = 0; |
348f01e3 | 800 | |
13b1b2ae | 801 | if (extended) { |
86dc6501 EJ |
802 | ccm_mpid = ntohll(ccm->mpid64); |
803 | ccm_opdown = ccm->opdown; | |
804 | } else { | |
805 | ccm_mpid = ntohs(ccm->mpid); | |
806 | ccm_opdown = false; | |
807 | } | |
8210113e | 808 | ccm_seq = ntohl(ccm->seq); |
b31bcf60 | 809 | |
144216a3 | 810 | if (ccm_interval != cfm->ccm_interval) { |
2b540ecb | 811 | VLOG_WARN_RL(&rl, "%s: received a CCM with an unexpected interval" |
348f01e3 | 812 | " (%"PRIu8") from RMP %"PRIu64, cfm->name, |
144216a3 EJ |
813 | ccm_interval, ccm_mpid); |
814 | } | |
b31bcf60 | 815 | |
13b1b2ae | 816 | if (extended && ccm_interval == 0 |
de724029 | 817 | && ccm_interval_ms_x != cfm->ccm_interval_ms) { |
2b540ecb | 818 | VLOG_WARN_RL(&rl, "%s: received a CCM with an unexpected extended" |
348f01e3 | 819 | " interval (%"PRIu16"ms) from RMP %"PRIu64, cfm->name, |
de724029 EJ |
820 | ccm_interval_ms_x, ccm_mpid); |
821 | } | |
822 | ||
144216a3 | 823 | rmp = lookup_remote_mp(cfm, ccm_mpid); |
86dc6501 EJ |
824 | if (!rmp) { |
825 | if (hmap_count(&cfm->remote_mps) < CFM_MAX_RMPS) { | |
8210113e | 826 | rmp = xzalloc(sizeof *rmp); |
86dc6501 EJ |
827 | hmap_insert(&cfm->remote_mps, &rmp->node, hash_mpid(ccm_mpid)); |
828 | } else { | |
2b540ecb | 829 | cfm_fault |= CFM_FAULT_OVERFLOW; |
86dc6501 EJ |
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 | ||
2b540ecb MM |
837 | if (ccm_rdi) { |
838 | cfm_fault |= CFM_FAULT_RDI; | |
839 | VLOG_DBG("%s: RDI bit flagged from RMP %"PRIu64, cfm->name, | |
66fb94b5 | 840 | ccm_mpid); |
2b540ecb MM |
841 | } |
842 | ||
8210113e EJ |
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 | ||
0dd17bfd | 847 | if (rmp) { |
2b540ecb MM |
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 | ||
8210113e EJ |
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 | ||
144216a3 | 861 | rmp->mpid = ccm_mpid; |
2b540ecb | 862 | if (!cfm_fault) { |
3967a833 | 863 | rmp->num_health_ccm++; |
5767a79a AW |
864 | if (cfm->demand) { |
865 | timer_set_duration(&cfm->demand_rx_ccm_t, | |
866 | 100 * cfm->ccm_interval_ms); | |
867 | } | |
3967a833 | 868 | } |
2b540ecb MM |
869 | rmp->recv = true; |
870 | cfm->recv_fault |= cfm_fault; | |
8210113e | 871 | rmp->seq = ccm_seq; |
86dc6501 | 872 | rmp->opup = !ccm_opdown; |
c3f72482 | 873 | rmp->last_rx = time_msec(); |
f805c4cc | 874 | } |
b31bcf60 | 875 | } |
13b1b2ae EJ |
876 | |
877 | out: | |
878 | ovs_mutex_unlock(&mutex); | |
b31bcf60 | 879 | } |
20c8e971 | 880 | |
88bf179a AW |
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 | ||
13b1b2ae | 895 | static int |
bd3950dd | 896 | cfm_get_fault__(const struct cfm *cfm) OVS_REQUIRES(mutex) |
a5610457 | 897 | { |
d7243b93 | 898 | if (cfm->fault_override >= 0) { |
b9380396 | 899 | return cfm->fault_override ? CFM_FAULT_OVERRIDE : 0; |
d7243b93 | 900 | } |
a5610457 EJ |
901 | return cfm->fault; |
902 | } | |
903 | ||
13b1b2ae EJ |
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 | ||
76c4290d AW |
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 | ||
3967a833 MM |
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 | |
13b1b2ae | 935 | cfm_get_health(const struct cfm *cfm) OVS_EXCLUDED(mutex) |
3967a833 | 936 | { |
13b1b2ae EJ |
937 | int health; |
938 | ||
939 | ovs_mutex_lock(&mutex); | |
940 | health = cfm->health; | |
941 | ovs_mutex_unlock(&mutex); | |
942 | return health; | |
3967a833 MM |
943 | } |
944 | ||
685acfd9 AW |
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 | ||
7e2b277b | 951 | atomic_read_relaxed(&cfm->extended, &extended); |
685acfd9 AW |
952 | |
953 | return extended ? cfm->remote_opup : -1; | |
954 | } | |
955 | ||
86dc6501 EJ |
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 | |
4653c558 EJ |
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 | |
685acfd9 | 962 | cfm_get_opup(const struct cfm *cfm) OVS_EXCLUDED(mutex) |
86dc6501 | 963 | { |
13b1b2ae EJ |
964 | int opup; |
965 | ||
966 | ovs_mutex_lock(&mutex); | |
685acfd9 | 967 | opup = cfm_get_opup__(cfm); |
13b1b2ae EJ |
968 | ovs_mutex_unlock(&mutex); |
969 | ||
970 | return opup; | |
86dc6501 EJ |
971 | } |
972 | ||
685acfd9 AW |
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 | ||
1de11730 EJ |
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 | |
13b1b2ae EJ |
985 | cfm_get_remote_mpids(const struct cfm *cfm, uint64_t **rmps, size_t *n_rmps) |
986 | OVS_EXCLUDED(mutex) | |
1de11730 | 987 | { |
13b1b2ae | 988 | ovs_mutex_lock(&mutex); |
685acfd9 AW |
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); | |
13b1b2ae | 1003 | ovs_mutex_unlock(&mutex); |
1de11730 EJ |
1004 | } |
1005 | ||
a5610457 | 1006 | static struct cfm * |
344e21d4 | 1007 | cfm_find(const char *name) OVS_REQUIRES(mutex) |
20c8e971 | 1008 | { |
a5610457 | 1009 | struct cfm *cfm; |
9ac3fce4 | 1010 | |
13b1b2ae | 1011 | HMAP_FOR_EACH_WITH_HASH (cfm, hmap_node, hash_string(name, 0), all_cfms) { |
6f629657 | 1012 | if (!strcmp(cfm->name, name)) { |
a5610457 | 1013 | return cfm; |
9ac3fce4 EJ |
1014 | } |
1015 | } | |
1016 | return NULL; | |
1017 | } | |
1018 | ||
1019 | static void | |
5675cb4c | 1020 | cfm_print_details(struct ds *ds, struct cfm *cfm) OVS_REQUIRES(mutex) |
9ac3fce4 | 1021 | { |
20c8e971 | 1022 | struct remote_mp *rmp; |
13b1b2ae | 1023 | bool extended; |
906bb3d0 | 1024 | int fault; |
20c8e971 | 1025 | |
7e2b277b | 1026 | atomic_read_relaxed(&cfm->extended, &extended); |
13b1b2ae | 1027 | |
ae75dae3 | 1028 | ds_put_format(ds, "---- %s ----\n", cfm->name); |
b9380396 | 1029 | ds_put_format(ds, "MPID %"PRIu64":%s%s\n", cfm->mpid, |
13b1b2ae | 1030 | extended ? " extended" : "", |
b9380396 EJ |
1031 | cfm->fault_override >= 0 ? " fault_override" : ""); |
1032 | ||
13b1b2ae | 1033 | fault = cfm_get_fault__(cfm); |
906bb3d0 | 1034 | if (fault) { |
f6d6edc0 | 1035 | ds_put_cstr(ds, " fault: "); |
c3f72482 | 1036 | ds_put_cfm_fault(ds, fault); |
b9380396 EJ |
1037 | ds_put_cstr(ds, "\n"); |
1038 | } | |
9ac3fce4 | 1039 | |
3967a833 | 1040 | if (cfm->health == -1) { |
f6d6edc0 | 1041 | ds_put_format(ds, " average health: undefined\n"); |
3967a833 | 1042 | } else { |
f6d6edc0 | 1043 | ds_put_format(ds, " average health: %d\n", cfm->health); |
3967a833 | 1044 | } |
f6d6edc0 BP |
1045 | ds_put_format(ds, " opstate: %s\n", cfm->opup ? "up" : "down"); |
1046 | ds_put_format(ds, " remote_opstate: %s\n", | |
86dc6501 | 1047 | cfm->remote_opup ? "up" : "down"); |
f6d6edc0 BP |
1048 | ds_put_format(ds, " interval: %dms\n", cfm->ccm_interval_ms); |
1049 | ds_put_format(ds, " next CCM tx: %lldms\n", | |
a5610457 | 1050 | timer_msecs_until_expired(&cfm->tx_timer)); |
f6d6edc0 | 1051 | ds_put_format(ds, " next fault check: %lldms\n", |
a5610457 | 1052 | timer_msecs_until_expired(&cfm->fault_timer)); |
20c8e971 | 1053 | |
a5610457 | 1054 | HMAP_FOR_EACH (rmp, node, &cfm->remote_mps) { |
2b540ecb | 1055 | ds_put_format(ds, "Remote MPID %"PRIu64"\n", rmp->mpid); |
f6d6edc0 | 1056 | ds_put_format(ds, " recv since check: %s\n", |
dd986e09 | 1057 | rmp->recv ? "true" : "false"); |
f6d6edc0 | 1058 | ds_put_format(ds, " opstate: %s\n", rmp->opup? "up" : "down"); |
20c8e971 | 1059 | } |
ae75dae3 JP |
1060 | } |
1061 | ||
1062 | static void | |
0e15264f | 1063 | cfm_unixctl_show(struct unixctl_conn *conn, int argc, const char *argv[], |
13b1b2ae | 1064 | void *aux OVS_UNUSED) OVS_EXCLUDED(mutex) |
ae75dae3 JP |
1065 | { |
1066 | struct ds ds = DS_EMPTY_INITIALIZER; | |
5675cb4c | 1067 | struct cfm *cfm; |
ae75dae3 | 1068 | |
13b1b2ae | 1069 | ovs_mutex_lock(&mutex); |
0e15264f BP |
1070 | if (argc > 1) { |
1071 | cfm = cfm_find(argv[1]); | |
ae75dae3 | 1072 | if (!cfm) { |
bde9f75d | 1073 | unixctl_command_reply_error(conn, "no such CFM object"); |
13b1b2ae | 1074 | goto out; |
ae75dae3 JP |
1075 | } |
1076 | cfm_print_details(&ds, cfm); | |
1077 | } else { | |
13b1b2ae | 1078 | HMAP_FOR_EACH (cfm, hmap_node, all_cfms) { |
ae75dae3 JP |
1079 | cfm_print_details(&ds, cfm); |
1080 | } | |
1081 | } | |
9ac3fce4 | 1082 | |
bde9f75d | 1083 | unixctl_command_reply(conn, ds_cstr(&ds)); |
9ac3fce4 | 1084 | ds_destroy(&ds); |
13b1b2ae EJ |
1085 | out: |
1086 | ovs_mutex_unlock(&mutex); | |
20c8e971 | 1087 | } |
d7243b93 EJ |
1088 | |
1089 | static void | |
1090 | cfm_unixctl_set_fault(struct unixctl_conn *conn, int argc, const char *argv[], | |
13b1b2ae | 1091 | void *aux OVS_UNUSED) OVS_EXCLUDED(mutex) |
d7243b93 EJ |
1092 | { |
1093 | const char *fault_str = argv[argc - 1]; | |
1094 | int fault_override; | |
1095 | struct cfm *cfm; | |
1096 | ||
13b1b2ae | 1097 | ovs_mutex_lock(&mutex); |
d7243b93 EJ |
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 { | |
bde9f75d | 1105 | unixctl_command_reply_error(conn, "unknown fault string"); |
13b1b2ae | 1106 | goto out; |
d7243b93 EJ |
1107 | } |
1108 | ||
1109 | if (argc > 2) { | |
1110 | cfm = cfm_find(argv[1]); | |
1111 | if (!cfm) { | |
bde9f75d | 1112 | unixctl_command_reply_error(conn, "no such CFM object"); |
13b1b2ae | 1113 | goto out; |
d7243b93 EJ |
1114 | } |
1115 | cfm->fault_override = fault_override; | |
88bf179a | 1116 | cfm_status_changed(cfm); |
d7243b93 | 1117 | } else { |
13b1b2ae | 1118 | HMAP_FOR_EACH (cfm, hmap_node, all_cfms) { |
d7243b93 | 1119 | cfm->fault_override = fault_override; |
88bf179a | 1120 | cfm_status_changed(cfm); |
d7243b93 EJ |
1121 | } |
1122 | } | |
1123 | ||
bde9f75d | 1124 | unixctl_command_reply(conn, "OK"); |
13b1b2ae EJ |
1125 | |
1126 | out: | |
1127 | ovs_mutex_unlock(&mutex); | |
d7243b93 | 1128 | } |