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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 EJ |
33 | #include "packets.h" |
34 | #include "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. */ |
74ff3298 JR |
48 | static const struct eth_addr eth_addr_ccm = { |
49 | { { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x30 } } }; | |
50 | static const struct eth_addr eth_addr_ccm_x = { | |
51 | { { 0x01, 0x23, 0x20, 0x00, 0x00, 0x30 } } }; | |
c0a2e71d EJ |
52 | |
53 | #define ETH_TYPE_CFM 0x8902 | |
54 | ||
55 | /* A 'ccm' represents a Continuity Check Message from the 802.1ag | |
56 | * specification. Continuity Check Messages are broadcast periodically so that | |
ce27cbee BP |
57 | * hosts can determine whom they have connectivity to. |
58 | * | |
59 | * The minimum length of a CCM as specified by IEEE 802.1ag is 75 bytes. | |
60 | * Previous versions of Open vSwitch generated 74-byte CCM messages, so we | |
61 | * accept such messages too. */ | |
62 | #define CCM_LEN 75 | |
63 | #define CCM_ACCEPT_LEN 74 | |
c0a2e71d EJ |
64 | #define CCM_MAID_LEN 48 |
65 | #define CCM_OPCODE 1 /* CFM message opcode meaning CCM. */ | |
aa62994c | 66 | #define CCM_RDI_MASK 0x80 |
3967a833 | 67 | #define CFM_HEALTH_INTERVAL 6 |
13b6bae6 LS |
68 | |
69 | OVS_PACKED( | |
c0a2e71d | 70 | struct ccm { |
6bdf30ee EJ |
71 | uint8_t mdlevel_version; /* MD Level and Version */ |
72 | uint8_t opcode; | |
73 | uint8_t flags; | |
74 | uint8_t tlv_offset; | |
c0a2e71d EJ |
75 | ovs_be32 seq; |
76 | ovs_be16 mpid; | |
6bdf30ee | 77 | uint8_t maid[CCM_MAID_LEN]; |
de724029 EJ |
78 | |
79 | /* Defined by ITU-T Y.1731 should be zero */ | |
80 | ovs_be16 interval_ms_x; /* Transmission interval in ms. */ | |
348f01e3 | 81 | ovs_be64 mpid64; /* MPID in extended mode. */ |
86dc6501 | 82 | uint8_t opdown; /* Operationally down. */ |
6bdf30ee | 83 | uint8_t zero[5]; |
ce27cbee BP |
84 | |
85 | /* TLV space. */ | |
86 | uint8_t end_tlv; | |
13b6bae6 | 87 | }); |
c0a2e71d | 88 | BUILD_ASSERT_DECL(CCM_LEN == sizeof(struct ccm)); |
b31bcf60 | 89 | |
a5610457 | 90 | struct cfm { |
90967e95 | 91 | const char *name; /* Name of this CFM object. */ |
6f629657 | 92 | struct hmap_node hmap_node; /* Node in all_cfms list. */ |
b31bcf60 | 93 | |
90967e95 EJ |
94 | struct netdev *netdev; |
95 | uint64_t rx_packets; /* Packets received by 'netdev'. */ | |
96 | ||
348f01e3 | 97 | uint64_t mpid; |
90967e95 | 98 | bool demand; /* Demand mode. */ |
ec9f40dc | 99 | bool booted; /* A full fault interval has occurred. */ |
2b540ecb | 100 | enum cfm_fault_reason fault; /* Connectivity fault status. */ |
ec9f40dc | 101 | enum cfm_fault_reason recv_fault; /* Bit mask of faults occurring on |
2b540ecb | 102 | receive. */ |
86dc6501 EJ |
103 | bool opup; /* Operational State. */ |
104 | bool remote_opup; /* Remote Operational State. */ | |
a5610457 | 105 | |
d7243b93 EJ |
106 | int fault_override; /* Manual override of 'fault' status. |
107 | Ignored if negative. */ | |
108 | ||
9ac3fce4 | 109 | uint32_t seq; /* The sequence number of our last CCM. */ |
b31bcf60 EJ |
110 | uint8_t ccm_interval; /* The CCM transmission interval. */ |
111 | int ccm_interval_ms; /* 'ccm_interval' in milliseconds. */ | |
189cb9e4 EJ |
112 | uint16_t ccm_vlan; /* Vlan tag of CCM PDUs. CFM_RANDOM_VLAN if |
113 | random. */ | |
a7aa2d3c | 114 | uint8_t ccm_pcp; /* Priority of CCM PDUs. */ |
84c5d450 | 115 | uint8_t maid[CCM_MAID_LEN]; /* The MAID of this CFM. */ |
b31bcf60 | 116 | |
6fabb78d EJ |
117 | struct timer tx_timer; /* Send CCM when expired. */ |
118 | struct timer fault_timer; /* Check for faults when expired. */ | |
93b8df38 | 119 | |
144216a3 | 120 | struct hmap remote_mps; /* Remote MPs. */ |
1de11730 EJ |
121 | |
122 | /* Result of cfm_get_remote_mpids(). Updated only during fault check to | |
123 | * avoid flapping. */ | |
124 | uint64_t *rmps_array; /* Cache of remote_mps. */ | |
125 | size_t rmps_array_len; /* Number of rmps in 'rmps_array'. */ | |
3967a833 MM |
126 | |
127 | int health; /* Percentage of the number of CCM frames | |
128 | received. */ | |
129 | int health_interval; /* Number of fault_intervals since health was | |
130 | recomputed. */ | |
b03c6f99 | 131 | long long int last_tx; /* Last CCM transmission time. */ |
8e9a73fa | 132 | |
7e2b277b JR |
133 | /* These bools are atomic to allow readers to check their values |
134 | * without taking 'mutex'. Such readers do not assume the values they | |
135 | * read are synchronized with any other members. */ | |
13b1b2ae EJ |
136 | atomic_bool check_tnl_key; /* Verify the tunnel key of inbound packets? */ |
137 | atomic_bool extended; /* Extended mode. */ | |
37bec3d3 | 138 | struct ovs_refcount ref_cnt; |
76c4290d AW |
139 | |
140 | uint64_t flap_count; /* Count the flaps since boot. */ | |
88bf179a AW |
141 | |
142 | /* True when the variables returned by cfm_get_*() are changed | |
143 | * since last check. */ | |
144 | bool status_changed; | |
5767a79a AW |
145 | |
146 | /* When 'cfm->demand' is set, at least one ccm is required to be received | |
147 | * every 100 * cfm_interval. If ccm is not received within this interval, | |
148 | * even if data packets are received, the cfm fault will be set. */ | |
149 | struct timer demand_rx_ccm_t; | |
93b8df38 EJ |
150 | }; |
151 | ||
152 | /* Remote MPs represent foreign network entities that are configured to have | |
153 | * the same MAID as this CFM instance. */ | |
154 | struct remote_mp { | |
348f01e3 | 155 | uint64_t mpid; /* The Maintenance Point ID of this 'remote_mp'. */ |
93b8df38 EJ |
156 | struct hmap_node node; /* Node in 'remote_mps' map. */ |
157 | ||
158 | bool recv; /* CCM was received since last fault check. */ | |
86dc6501 | 159 | bool opup; /* Operational State. */ |
8210113e | 160 | uint32_t seq; /* Most recently received sequence number. */ |
3967a833 MM |
161 | uint8_t num_health_ccm; /* Number of received ccm frames every |
162 | CFM_HEALTH_INTERVAL * 'fault_interval'. */ | |
c3f72482 | 163 | long long int last_rx; /* Last CCM reception time. */ |
3967a833 | 164 | |
b31bcf60 EJ |
165 | }; |
166 | ||
8210113e | 167 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(20, 30); |
13b1b2ae EJ |
168 | |
169 | static struct ovs_mutex mutex = OVS_MUTEX_INITIALIZER; | |
170 | static struct hmap all_cfms__ = HMAP_INITIALIZER(&all_cfms__); | |
171 | static struct hmap *const all_cfms OVS_GUARDED_BY(mutex) = &all_cfms__; | |
9ac3fce4 | 172 | |
0e15264f | 173 | static unixctl_cb_func cfm_unixctl_show; |
d7243b93 | 174 | static unixctl_cb_func cfm_unixctl_set_fault; |
dd986e09 | 175 | |
90967e95 | 176 | static uint64_t |
bd3950dd | 177 | cfm_rx_packets(const struct cfm *cfm) OVS_REQUIRES(mutex) |
90967e95 EJ |
178 | { |
179 | struct netdev_stats stats; | |
180 | ||
181 | if (!netdev_get_stats(cfm->netdev, &stats)) { | |
182 | return stats.rx_packets; | |
183 | } else { | |
184 | return 0; | |
185 | } | |
186 | } | |
187 | ||
74ff3298 | 188 | static struct eth_addr |
5675cb4c | 189 | cfm_ccm_addr(struct cfm *cfm) |
ef9819b5 | 190 | { |
13b1b2ae | 191 | bool extended; |
7e2b277b JR |
192 | |
193 | atomic_read_relaxed(&cfm->extended, &extended); | |
194 | ||
13b1b2ae | 195 | return extended ? eth_addr_ccm_x : eth_addr_ccm; |
ef9819b5 EJ |
196 | } |
197 | ||
b9380396 EJ |
198 | /* Returns the string representation of the given cfm_fault_reason 'reason'. */ |
199 | const char * | |
13b1b2ae EJ |
200 | cfm_fault_reason_to_str(int reason) |
201 | { | |
b9380396 EJ |
202 | switch (reason) { |
203 | #define CFM_FAULT_REASON(NAME, STR) case CFM_FAULT_##NAME: return #STR; | |
204 | CFM_FAULT_REASONS | |
205 | #undef CFM_FAULT_REASON | |
206 | default: return "<unknown>"; | |
207 | } | |
208 | } | |
209 | ||
210 | static void | |
c3f72482 | 211 | ds_put_cfm_fault(struct ds *ds, int fault) |
b9380396 | 212 | { |
b9380396 EJ |
213 | int i; |
214 | ||
215 | for (i = 0; i < CFM_FAULT_N_REASONS; i++) { | |
216 | int reason = 1 << i; | |
217 | ||
c3f72482 EJ |
218 | if (fault & reason) { |
219 | ds_put_format(ds, "%s ", cfm_fault_reason_to_str(reason)); | |
b9380396 EJ |
220 | } |
221 | } | |
c3f72482 EJ |
222 | |
223 | ds_chomp(ds, ' '); | |
b9380396 EJ |
224 | } |
225 | ||
84c5d450 | 226 | static void |
bd3950dd | 227 | cfm_generate_maid(struct cfm *cfm) OVS_REQUIRES(mutex) |
84c5d450 | 228 | { |
db16e36e EJ |
229 | const char *ovs_md_name = "ovs"; |
230 | const char *ovs_ma_name = "ovs"; | |
84c5d450 EJ |
231 | uint8_t *ma_p; |
232 | size_t md_len, ma_len; | |
233 | ||
a5610457 | 234 | memset(cfm->maid, 0, CCM_MAID_LEN); |
84c5d450 EJ |
235 | |
236 | md_len = strlen(ovs_md_name); | |
237 | ma_len = strlen(ovs_ma_name); | |
238 | ||
cb22974d | 239 | ovs_assert(md_len && ma_len && md_len + ma_len + 4 <= CCM_MAID_LEN); |
84c5d450 | 240 | |
a5610457 EJ |
241 | cfm->maid[0] = 4; /* MD name string format. */ |
242 | cfm->maid[1] = md_len; /* MD name size. */ | |
243 | memcpy(&cfm->maid[2], ovs_md_name, md_len); /* MD name. */ | |
84c5d450 | 244 | |
a5610457 | 245 | ma_p = cfm->maid + 2 + md_len; |
84c5d450 EJ |
246 | ma_p[0] = 2; /* MA name string format. */ |
247 | ma_p[1] = ma_len; /* MA name size. */ | |
248 | memcpy(&ma_p[2], ovs_ma_name, ma_len); /* MA name. */ | |
249 | } | |
250 | ||
b31bcf60 EJ |
251 | static int |
252 | ccm_interval_to_ms(uint8_t interval) | |
253 | { | |
254 | switch (interval) { | |
428b2edd | 255 | case 0: OVS_NOT_REACHED(); /* Explicitly not supported by 802.1ag. */ |
b31bcf60 EJ |
256 | case 1: return 3; /* Not recommended due to timer resolution. */ |
257 | case 2: return 10; /* Not recommended due to timer resolution. */ | |
258 | case 3: return 100; | |
259 | case 4: return 1000; | |
260 | case 5: return 10000; | |
261 | case 6: return 60000; | |
262 | case 7: return 600000; | |
428b2edd | 263 | default: OVS_NOT_REACHED(); /* Explicitly not supported by 802.1ag. */ |
b31bcf60 EJ |
264 | } |
265 | ||
428b2edd | 266 | OVS_NOT_REACHED(); |
b31bcf60 EJ |
267 | } |
268 | ||
aac19178 | 269 | static long long int |
bd3950dd | 270 | cfm_fault_interval(struct cfm *cfm) OVS_REQUIRES(mutex) |
aac19178 EJ |
271 | { |
272 | /* According to the 802.1ag specification we should assume every other MP | |
273 | * with the same MAID has the same transmission interval that we have. If | |
274 | * an MP has a different interval, cfm_process_heartbeat will register it | |
275 | * as a fault (likely due to a configuration error). Thus we can check all | |
276 | * MPs at once making this quite a bit simpler. | |
277 | * | |
03f209ba AW |
278 | * When cfm is not in demand mode, we check when (ccm_interval_ms * 3.5) ms |
279 | * have passed. When cfm is in demand mode, we check when | |
280 | * (MAX(ccm_interval_ms, 500) * 3.5) ms have passed. This ensures that | |
281 | * ovs-vswitchd has enough time to pull statistics from the datapath. */ | |
282 | ||
283 | return (MAX(cfm->ccm_interval_ms, cfm->demand ? 500 : cfm->ccm_interval_ms) | |
284 | * 7) / 2; | |
aac19178 EJ |
285 | } |
286 | ||
b31bcf60 EJ |
287 | static uint8_t |
288 | ms_to_ccm_interval(int interval_ms) | |
289 | { | |
290 | uint8_t i; | |
291 | ||
292 | for (i = 7; i > 0; i--) { | |
293 | if (ccm_interval_to_ms(i) <= interval_ms) { | |
294 | return i; | |
295 | } | |
296 | } | |
297 | ||
298 | return 1; | |
299 | } | |
300 | ||
b31bcf60 | 301 | static uint32_t |
348f01e3 | 302 | hash_mpid(uint64_t mpid) |
b31bcf60 | 303 | { |
965607c8 | 304 | return hash_uint64(mpid); |
b31bcf60 EJ |
305 | } |
306 | ||
307 | static bool | |
348f01e3 | 308 | cfm_is_valid_mpid(bool extended, uint64_t mpid) |
b31bcf60 | 309 | { |
348f01e3 EJ |
310 | /* 802.1ag specification requires MPIDs to be within the range [1, 8191]. |
311 | * In extended mode we relax this requirement. */ | |
312 | return mpid >= 1 && (extended || mpid <= 8191); | |
b31bcf60 EJ |
313 | } |
314 | ||
315 | static struct remote_mp * | |
bd3950dd | 316 | lookup_remote_mp(const struct cfm *cfm, uint64_t mpid) OVS_REQUIRES(mutex) |
b31bcf60 EJ |
317 | { |
318 | struct remote_mp *rmp; | |
319 | ||
144216a3 | 320 | HMAP_FOR_EACH_IN_BUCKET (rmp, node, hash_mpid(mpid), &cfm->remote_mps) { |
b31bcf60 EJ |
321 | if (rmp->mpid == mpid) { |
322 | return rmp; | |
323 | } | |
324 | } | |
325 | ||
326 | return NULL; | |
327 | } | |
328 | ||
9ac3fce4 EJ |
329 | void |
330 | cfm_init(void) | |
331 | { | |
0e15264f | 332 | unixctl_command_register("cfm/show", "[interface]", 0, 1, cfm_unixctl_show, |
ae75dae3 | 333 | NULL); |
d7243b93 EJ |
334 | unixctl_command_register("cfm/set-fault", "[interface] normal|false|true", |
335 | 1, 2, cfm_unixctl_set_fault, NULL); | |
9ac3fce4 EJ |
336 | } |
337 | ||
7fcd0037 AW |
338 | /* Records the status change and changes the global connectivity seq. */ |
339 | static void | |
340 | cfm_status_changed(struct cfm *cfm) OVS_REQUIRES(mutex) | |
341 | { | |
342 | seq_change(connectivity_seq_get()); | |
343 | cfm->status_changed = true; | |
344 | } | |
345 | ||
6f629657 EJ |
346 | /* Allocates a 'cfm' object called 'name'. 'cfm' should be initialized by |
347 | * cfm_configure() before use. */ | |
b31bcf60 | 348 | struct cfm * |
13b1b2ae | 349 | cfm_create(const struct netdev *netdev) OVS_EXCLUDED(mutex) |
b31bcf60 EJ |
350 | { |
351 | struct cfm *cfm; | |
b31bcf60 | 352 | |
a5610457 | 353 | cfm = xzalloc(sizeof *cfm); |
90967e95 EJ |
354 | cfm->netdev = netdev_ref(netdev); |
355 | cfm->name = netdev_get_name(cfm->netdev); | |
a5610457 | 356 | hmap_init(&cfm->remote_mps); |
86dc6501 | 357 | cfm->remote_opup = true; |
d7243b93 | 358 | cfm->fault_override = -1; |
3967a833 | 359 | cfm->health = -1; |
b03c6f99 | 360 | cfm->last_tx = 0; |
76c4290d | 361 | cfm->flap_count = 0; |
13b1b2ae EJ |
362 | atomic_init(&cfm->extended, false); |
363 | atomic_init(&cfm->check_tnl_key, false); | |
37bec3d3 | 364 | ovs_refcount_init(&cfm->ref_cnt); |
13b1b2ae EJ |
365 | |
366 | ovs_mutex_lock(&mutex); | |
7fcd0037 | 367 | cfm_status_changed(cfm); |
13b1b2ae EJ |
368 | cfm_generate_maid(cfm); |
369 | hmap_insert(all_cfms, &cfm->hmap_node, hash_string(cfm->name, 0)); | |
370 | ovs_mutex_unlock(&mutex); | |
88bf179a | 371 | |
b31bcf60 EJ |
372 | return cfm; |
373 | } | |
374 | ||
375 | void | |
13b1b2ae | 376 | cfm_unref(struct cfm *cfm) OVS_EXCLUDED(mutex) |
b31bcf60 | 377 | { |
4ec3d7c7 | 378 | struct remote_mp *rmp; |
b31bcf60 EJ |
379 | |
380 | if (!cfm) { | |
381 | return; | |
382 | } | |
383 | ||
24f83812 | 384 | if (ovs_refcount_unref_relaxed(&cfm->ref_cnt) != 1) { |
8e9a73fa EJ |
385 | return; |
386 | } | |
387 | ||
13b1b2ae | 388 | ovs_mutex_lock(&mutex); |
7fcd0037 | 389 | cfm_status_changed(cfm); |
13b1b2ae EJ |
390 | hmap_remove(all_cfms, &cfm->hmap_node); |
391 | ovs_mutex_unlock(&mutex); | |
392 | ||
4ec3d7c7 | 393 | HMAP_FOR_EACH_POP (rmp, node, &cfm->remote_mps) { |
b31bcf60 EJ |
394 | free(rmp); |
395 | } | |
396 | ||
a5610457 | 397 | hmap_destroy(&cfm->remote_mps); |
90967e95 | 398 | netdev_close(cfm->netdev); |
1de11730 | 399 | free(cfm->rmps_array); |
c5f81b20 | 400 | |
a5610457 | 401 | free(cfm); |
b31bcf60 EJ |
402 | } |
403 | ||
8e9a73fa EJ |
404 | struct cfm * |
405 | cfm_ref(const struct cfm *cfm_) | |
406 | { | |
407 | struct cfm *cfm = CONST_CAST(struct cfm *, cfm_); | |
408 | if (cfm) { | |
37bec3d3 | 409 | ovs_refcount_ref(&cfm->ref_cnt); |
8e9a73fa EJ |
410 | } |
411 | return cfm; | |
412 | } | |
413 | ||
a58727fb EJ |
414 | /* Should be run periodically to update fault statistics messages. */ |
415 | void | |
13b1b2ae | 416 | cfm_run(struct cfm *cfm) OVS_EXCLUDED(mutex) |
b31bcf60 | 417 | { |
13b1b2ae | 418 | ovs_mutex_lock(&mutex); |
a5610457 EJ |
419 | if (timer_expired(&cfm->fault_timer)) { |
420 | long long int interval = cfm_fault_interval(cfm); | |
144216a3 | 421 | struct remote_mp *rmp, *rmp_next; |
45756018 | 422 | enum cfm_fault_reason old_cfm_fault = cfm->fault; |
18dcfc56 AW |
423 | uint64_t old_flap_count = cfm->flap_count; |
424 | int old_health = cfm->health; | |
425 | size_t old_rmps_array_len = cfm->rmps_array_len; | |
426 | bool old_rmps_deleted = false; | |
f23d157c | 427 | bool old_rmp_opup = cfm->remote_opup; |
90967e95 | 428 | bool demand_override; |
016953ae PI |
429 | bool rmp_set_opup = false; |
430 | bool rmp_set_opdown = false; | |
b31bcf60 | 431 | |
b9380396 EJ |
432 | cfm->fault = cfm->recv_fault; |
433 | cfm->recv_fault = 0; | |
e14749fa | 434 | |
1de11730 EJ |
435 | cfm->rmps_array_len = 0; |
436 | free(cfm->rmps_array); | |
437 | cfm->rmps_array = xmalloc(hmap_count(&cfm->remote_mps) * | |
438 | sizeof *cfm->rmps_array); | |
439 | ||
3967a833 MM |
440 | if (cfm->health_interval == CFM_HEALTH_INTERVAL) { |
441 | /* Calculate the cfm health of the interface. If the number of | |
442 | * remote_mpids of a cfm interface is > 1, the cfm health is | |
443 | * undefined. If the number of remote_mpids is 1, the cfm health is | |
444 | * the percentage of the ccm frames received in the | |
445 | * (CFM_HEALTH_INTERVAL * 3.5)ms, else it is 0. */ | |
446 | if (hmap_count(&cfm->remote_mps) > 1) { | |
447 | cfm->health = -1; | |
448 | } else if (hmap_is_empty(&cfm->remote_mps)) { | |
449 | cfm->health = 0; | |
450 | } else { | |
451 | int exp_ccm_recvd; | |
452 | ||
453 | rmp = CONTAINER_OF(hmap_first(&cfm->remote_mps), | |
454 | struct remote_mp, node); | |
455 | exp_ccm_recvd = (CFM_HEALTH_INTERVAL * 7) / 2; | |
456 | /* Calculate the percentage of healthy ccm frames received. | |
457 | * Since the 'fault_interval' is (3.5 * cfm_interval), and | |
458 | * 1 CCM packet must be received every cfm_interval, | |
459 | * the 'remote_mpid' health reports the percentage of | |
460 | * healthy CCM frames received every | |
461 | * 'CFM_HEALTH_INTERVAL'th 'fault_interval'. */ | |
462 | cfm->health = (rmp->num_health_ccm * 100) / exp_ccm_recvd; | |
463 | cfm->health = MIN(cfm->health, 100); | |
464 | rmp->num_health_ccm = 0; | |
cb22974d | 465 | ovs_assert(cfm->health >= 0 && cfm->health <= 100); |
3967a833 MM |
466 | } |
467 | cfm->health_interval = 0; | |
468 | } | |
469 | cfm->health_interval++; | |
470 | ||
90967e95 EJ |
471 | demand_override = false; |
472 | if (cfm->demand) { | |
473 | uint64_t rx_packets = cfm_rx_packets(cfm); | |
474 | demand_override = hmap_count(&cfm->remote_mps) == 1 | |
5767a79a AW |
475 | && rx_packets > cfm->rx_packets |
476 | && !timer_expired(&cfm->demand_rx_ccm_t); | |
90967e95 EJ |
477 | cfm->rx_packets = rx_packets; |
478 | } | |
6fabb78d | 479 | |
90967e95 | 480 | HMAP_FOR_EACH_SAFE (rmp, rmp_next, node, &cfm->remote_mps) { |
144216a3 | 481 | if (!rmp->recv) { |
c3f72482 EJ |
482 | VLOG_INFO("%s: Received no CCM from RMP %"PRIu64" in the last" |
483 | " %lldms", cfm->name, rmp->mpid, | |
484 | time_msec() - rmp->last_rx); | |
90967e95 | 485 | if (!demand_override) { |
18dcfc56 | 486 | old_rmps_deleted = true; |
90967e95 EJ |
487 | hmap_remove(&cfm->remote_mps, &rmp->node); |
488 | free(rmp); | |
489 | } | |
144216a3 EJ |
490 | } else { |
491 | rmp->recv = false; | |
492 | ||
016953ae PI |
493 | if (rmp->opup) { |
494 | rmp_set_opup = true; | |
495 | } else { | |
496 | rmp_set_opdown = true; | |
86dc6501 EJ |
497 | } |
498 | ||
1de11730 | 499 | cfm->rmps_array[cfm->rmps_array_len++] = rmp->mpid; |
6fabb78d | 500 | } |
b31bcf60 EJ |
501 | } |
502 | ||
016953ae PI |
503 | if (rmp_set_opdown) { |
504 | cfm->remote_opup = false; | |
505 | } | |
506 | else if (rmp_set_opup) { | |
507 | cfm->remote_opup = true; | |
508 | } | |
509 | ||
144216a3 | 510 | if (hmap_is_empty(&cfm->remote_mps)) { |
b9380396 | 511 | cfm->fault |= CFM_FAULT_RECV; |
dd986e09 EJ |
512 | } |
513 | ||
fb668e3a JS |
514 | if (old_cfm_fault != cfm->fault) { |
515 | if (!VLOG_DROP_INFO(&rl)) { | |
516 | struct ds ds = DS_EMPTY_INITIALIZER; | |
517 | ||
518 | ds_put_cstr(&ds, "from ["); | |
519 | ds_put_cfm_fault(&ds, old_cfm_fault); | |
520 | ds_put_cstr(&ds, "] to ["); | |
521 | ds_put_cfm_fault(&ds, cfm->fault); | |
522 | ds_put_char(&ds, ']'); | |
523 | VLOG_INFO("%s: CFM faults changed %s.", cfm->name, ds_cstr(&ds)); | |
524 | ds_destroy(&ds); | |
525 | } | |
76c4290d AW |
526 | |
527 | /* If there is a flap, increments the counter. */ | |
45756018 | 528 | if (old_cfm_fault == 0 || cfm->fault == 0) { |
76c4290d AW |
529 | cfm->flap_count++; |
530 | } | |
18dcfc56 | 531 | } |
f23d157c | 532 | |
18dcfc56 AW |
533 | /* These variables represent the cfm session status, it is desirable |
534 | * to update them to database immediately after change. */ | |
535 | if (old_health != cfm->health | |
536 | || old_rmp_opup != cfm->remote_opup | |
537 | || (old_rmps_array_len != cfm->rmps_array_len || old_rmps_deleted) | |
538 | || old_cfm_fault != cfm->fault | |
539 | || old_flap_count != cfm->flap_count) { | |
88bf179a | 540 | cfm_status_changed(cfm); |
8210113e EJ |
541 | } |
542 | ||
0d0c0bb5 | 543 | cfm->booted = true; |
a5610457 | 544 | timer_set_duration(&cfm->fault_timer, interval); |
2f478344 | 545 | VLOG_DBG("%s: new fault interval", cfm->name); |
b31bcf60 | 546 | } |
13b1b2ae | 547 | ovs_mutex_unlock(&mutex); |
a58727fb | 548 | } |
b31bcf60 | 549 | |
a58727fb EJ |
550 | /* Should be run periodically to check if the CFM module has a CCM message it |
551 | * wishes to send. */ | |
552 | bool | |
13b1b2ae | 553 | cfm_should_send_ccm(struct cfm *cfm) OVS_EXCLUDED(mutex) |
a58727fb | 554 | { |
13b1b2ae EJ |
555 | bool ret; |
556 | ||
557 | ovs_mutex_lock(&mutex); | |
558 | ret = timer_expired(&cfm->tx_timer); | |
559 | ovs_mutex_unlock(&mutex); | |
560 | return ret; | |
a58727fb EJ |
561 | } |
562 | ||
c0a2e71d | 563 | /* Composes a CCM message into 'packet'. Messages generated with this function |
a58727fb EJ |
564 | * should be sent whenever cfm_should_send_ccm() indicates. */ |
565 | void | |
cf62fa4c | 566 | cfm_compose_ccm(struct cfm *cfm, struct dp_packet *packet, |
74ff3298 | 567 | const struct eth_addr eth_src) OVS_EXCLUDED(mutex) |
a58727fb | 568 | { |
189cb9e4 | 569 | uint16_t ccm_vlan; |
c0a2e71d | 570 | struct ccm *ccm; |
13b1b2ae | 571 | bool extended; |
c0a2e71d | 572 | |
13b1b2ae | 573 | ovs_mutex_lock(&mutex); |
a5610457 | 574 | timer_set_duration(&cfm->tx_timer, cfm->ccm_interval_ms); |
75a4ead1 EJ |
575 | eth_compose(packet, cfm_ccm_addr(cfm), eth_src, ETH_TYPE_CFM, sizeof *ccm); |
576 | ||
189cb9e4 EJ |
577 | ccm_vlan = (cfm->ccm_vlan != CFM_RANDOM_VLAN |
578 | ? cfm->ccm_vlan | |
579 | : random_uint16()); | |
580 | ccm_vlan = ccm_vlan & VLAN_VID_MASK; | |
581 | ||
582 | if (ccm_vlan || cfm->ccm_pcp) { | |
583 | uint16_t tci = ccm_vlan | (cfm->ccm_pcp << VLAN_PCP_SHIFT); | |
1bf02876 | 584 | eth_push_vlan(packet, htons(ETH_TYPE_VLAN), htons(tci)); |
75a4ead1 EJ |
585 | } |
586 | ||
7e2b277b JR |
587 | atomic_read_relaxed(&cfm->extended, &extended); |
588 | ||
cf62fa4c | 589 | ccm = dp_packet_l3(packet); |
a58727fb EJ |
590 | ccm->mdlevel_version = 0; |
591 | ccm->opcode = CCM_OPCODE; | |
592 | ccm->tlv_offset = 70; | |
a5610457 | 593 | ccm->seq = htonl(++cfm->seq); |
a5610457 EJ |
594 | ccm->flags = cfm->ccm_interval; |
595 | memcpy(ccm->maid, cfm->maid, sizeof ccm->maid); | |
56717eb1 | 596 | memset(ccm->zero, 0, sizeof ccm->zero); |
ce27cbee | 597 | ccm->end_tlv = 0; |
aa62994c | 598 | |
13b1b2ae | 599 | if (extended) { |
348f01e3 EJ |
600 | ccm->mpid = htons(hash_mpid(cfm->mpid)); |
601 | ccm->mpid64 = htonll(cfm->mpid); | |
86dc6501 | 602 | ccm->opdown = !cfm->opup; |
348f01e3 EJ |
603 | } else { |
604 | ccm->mpid = htons(cfm->mpid); | |
605 | ccm->mpid64 = htonll(0); | |
86dc6501 | 606 | ccm->opdown = 0; |
348f01e3 EJ |
607 | } |
608 | ||
de724029 | 609 | if (cfm->ccm_interval == 0) { |
13b1b2ae | 610 | ovs_assert(extended); |
de724029 | 611 | ccm->interval_ms_x = htons(cfm->ccm_interval_ms); |
d2859659 BP |
612 | } else { |
613 | ccm->interval_ms_x = htons(0); | |
de724029 EJ |
614 | } |
615 | ||
0d0c0bb5 | 616 | if (cfm->booted && hmap_is_empty(&cfm->remote_mps)) { |
aa62994c EJ |
617 | ccm->flags |= CCM_RDI_MASK; |
618 | } | |
b03c6f99 EJ |
619 | |
620 | if (cfm->last_tx) { | |
621 | long long int delay = time_msec() - cfm->last_tx; | |
622 | if (delay > (cfm->ccm_interval_ms * 3 / 2)) { | |
df0e5f55 | 623 | VLOG_INFO("%s: long delay of %lldms (expected %dms) sending CCM" |
b03c6f99 EJ |
624 | " seq %"PRIu32, cfm->name, delay, cfm->ccm_interval_ms, |
625 | cfm->seq); | |
626 | } | |
627 | } | |
628 | cfm->last_tx = time_msec(); | |
13b1b2ae | 629 | ovs_mutex_unlock(&mutex); |
b31bcf60 EJ |
630 | } |
631 | ||
0477baa9 | 632 | long long int |
13b1b2ae | 633 | cfm_wait(struct cfm *cfm) OVS_EXCLUDED(mutex) |
b31bcf60 | 634 | { |
0477baa9 DF |
635 | long long int wake_time = cfm_wake_time(cfm); |
636 | poll_timer_wait_until(wake_time); | |
637 | return wake_time; | |
526d174a AW |
638 | } |
639 | ||
640 | ||
641 | /* Returns the next cfm wakeup time. */ | |
642 | long long int | |
643 | cfm_wake_time(struct cfm *cfm) OVS_EXCLUDED(mutex) | |
644 | { | |
645 | long long int retval; | |
646 | ||
647 | if (!cfm) { | |
648 | return LLONG_MAX; | |
649 | } | |
650 | ||
13b1b2ae | 651 | ovs_mutex_lock(&mutex); |
526d174a | 652 | retval = MIN(cfm->tx_timer.t, cfm->fault_timer.t); |
13b1b2ae | 653 | ovs_mutex_unlock(&mutex); |
526d174a | 654 | return retval; |
b31bcf60 EJ |
655 | } |
656 | ||
526d174a | 657 | |
a5610457 | 658 | /* Configures 'cfm' with settings from 's'. */ |
b31bcf60 | 659 | bool |
a5610457 | 660 | cfm_configure(struct cfm *cfm, const struct cfm_settings *s) |
13b1b2ae | 661 | OVS_EXCLUDED(mutex) |
b31bcf60 | 662 | { |
9aa952b2 | 663 | uint8_t interval; |
de724029 | 664 | int interval_ms; |
b31bcf60 | 665 | |
348f01e3 | 666 | if (!cfm_is_valid_mpid(s->extended, s->mpid) || s->interval <= 0) { |
b31bcf60 EJ |
667 | return false; |
668 | } | |
669 | ||
13b1b2ae | 670 | ovs_mutex_lock(&mutex); |
a5610457 | 671 | cfm->mpid = s->mpid; |
86dc6501 | 672 | cfm->opup = s->opup; |
a5610457 | 673 | interval = ms_to_ccm_interval(s->interval); |
de724029 EJ |
674 | interval_ms = ccm_interval_to_ms(interval); |
675 | ||
7e2b277b JR |
676 | atomic_store_relaxed(&cfm->check_tnl_key, s->check_tnl_key); |
677 | atomic_store_relaxed(&cfm->extended, s->extended); | |
13b1b2ae | 678 | |
189cb9e4 | 679 | cfm->ccm_vlan = s->ccm_vlan; |
a7aa2d3c | 680 | cfm->ccm_pcp = s->ccm_pcp & (VLAN_PCP_MASK >> VLAN_PCP_SHIFT); |
13b1b2ae | 681 | if (s->extended && interval_ms != s->interval) { |
de724029 EJ |
682 | interval = 0; |
683 | interval_ms = MIN(s->interval, UINT16_MAX); | |
684 | } | |
9aa952b2 | 685 | |
13b1b2ae | 686 | if (s->extended && s->demand) { |
90967e95 EJ |
687 | if (!cfm->demand) { |
688 | cfm->demand = true; | |
689 | cfm->rx_packets = cfm_rx_packets(cfm); | |
690 | } | |
691 | } else { | |
692 | cfm->demand = false; | |
693 | } | |
694 | ||
de724029 | 695 | if (interval != cfm->ccm_interval || interval_ms != cfm->ccm_interval_ms) { |
a5610457 | 696 | cfm->ccm_interval = interval; |
de724029 | 697 | cfm->ccm_interval_ms = interval_ms; |
b31bcf60 | 698 | |
a5610457 EJ |
699 | timer_set_expired(&cfm->tx_timer); |
700 | timer_set_duration(&cfm->fault_timer, cfm_fault_interval(cfm)); | |
701 | } | |
b31bcf60 | 702 | |
13b1b2ae | 703 | ovs_mutex_unlock(&mutex); |
a5610457 | 704 | return true; |
b31bcf60 EJ |
705 | } |
706 | ||
9d46b444 EJ |
707 | /* Must be called when the netdev owned by 'cfm' should change. */ |
708 | void | |
709 | cfm_set_netdev(struct cfm *cfm, const struct netdev *netdev) | |
13b1b2ae | 710 | OVS_EXCLUDED(mutex) |
9d46b444 | 711 | { |
13b1b2ae | 712 | ovs_mutex_lock(&mutex); |
9d46b444 EJ |
713 | if (cfm->netdev != netdev) { |
714 | netdev_close(cfm->netdev); | |
715 | cfm->netdev = netdev_ref(netdev); | |
716 | } | |
13b1b2ae | 717 | ovs_mutex_unlock(&mutex); |
9d46b444 EJ |
718 | } |
719 | ||
642dc74d JP |
720 | /* Returns true if 'cfm' should process packets from 'flow'. Sets |
721 | * fields in 'wc' that were used to make the determination. */ | |
b31bcf60 | 722 | bool |
5675cb4c | 723 | cfm_should_process_flow(const struct cfm *cfm_, const struct flow *flow, |
642dc74d | 724 | struct flow_wildcards *wc) |
b31bcf60 | 725 | { |
5675cb4c | 726 | struct cfm *cfm = CONST_CAST(struct cfm *, cfm_); |
13b1b2ae EJ |
727 | bool check_tnl_key; |
728 | ||
7e2b277b JR |
729 | /* Most packets are not CFM. */ |
730 | if (OVS_LIKELY(flow->dl_type != htons(ETH_TYPE_CFM))) { | |
731 | return false; | |
732 | } | |
733 | ||
642dc74d | 734 | memset(&wc->masks.dl_dst, 0xff, sizeof wc->masks.dl_dst); |
7e2b277b JR |
735 | if (OVS_UNLIKELY(!eth_addr_equals(flow->dl_dst, cfm_ccm_addr(cfm)))) { |
736 | return false; | |
737 | } | |
738 | ||
739 | atomic_read_relaxed(&cfm->check_tnl_key, &check_tnl_key); | |
740 | ||
13b1b2ae | 741 | if (check_tnl_key) { |
642dc74d | 742 | memset(&wc->masks.tunnel.tun_id, 0xff, sizeof wc->masks.tunnel.tun_id); |
7e2b277b | 743 | return flow->tunnel.tun_id == htonll(0); |
642dc74d | 744 | } |
7e2b277b | 745 | return true; |
b31bcf60 EJ |
746 | } |
747 | ||
748 | /* Updates internal statistics relevant to packet 'p'. Should be called on | |
749 | * every packet whose flow returned true when passed to | |
750 | * cfm_should_process_flow. */ | |
751 | void | |
cf62fa4c | 752 | cfm_process_heartbeat(struct cfm *cfm, const struct dp_packet *p) |
13b1b2ae | 753 | OVS_EXCLUDED(mutex) |
b31bcf60 EJ |
754 | { |
755 | struct ccm *ccm; | |
0dd17bfd | 756 | struct eth_header *eth; |
7e2b277b | 757 | bool extended; |
b31bcf60 | 758 | |
13b1b2ae EJ |
759 | ovs_mutex_lock(&mutex); |
760 | ||
7e2b277b JR |
761 | atomic_read_relaxed(&cfm->extended, &extended); |
762 | ||
2482b0b0 | 763 | eth = dp_packet_eth(p); |
cf62fa4c | 764 | ccm = dp_packet_at(p, (uint8_t *)dp_packet_l3(p) - (uint8_t *)dp_packet_data(p), |
437d0d22 | 765 | CCM_ACCEPT_LEN); |
b31bcf60 EJ |
766 | |
767 | if (!ccm) { | |
32977975 EJ |
768 | VLOG_INFO_RL(&rl, "%s: Received an unparseable 802.1ag CCM heartbeat.", |
769 | cfm->name); | |
13b1b2ae | 770 | goto out; |
b31bcf60 EJ |
771 | } |
772 | ||
773 | if (ccm->opcode != CCM_OPCODE) { | |
32977975 EJ |
774 | VLOG_INFO_RL(&rl, "%s: Received an unsupported 802.1ag message. " |
775 | "(opcode %u)", cfm->name, ccm->opcode); | |
13b1b2ae | 776 | goto out; |
b31bcf60 EJ |
777 | } |
778 | ||
5e809322 | 779 | /* According to the 802.1ag specification, reception of a CCM with an |
aa7f1158 EJ |
780 | * incorrect ccm_interval, unexpected MAID, or unexpected MPID should |
781 | * trigger a fault. We ignore this requirement for several reasons. | |
5e809322 EJ |
782 | * |
783 | * Faults can cause a controller or Open vSwitch to make potentially | |
784 | * expensive changes to the network topology. It seems prudent to trigger | |
785 | * them judiciously, especially when CFM is used to check slave status of | |
786 | * bonds. Furthermore, faults can be maliciously triggered by crafting | |
2b540ecb | 787 | * unexpected CCMs. */ |
a5610457 | 788 | if (memcmp(ccm->maid, cfm->maid, sizeof ccm->maid)) { |
b9380396 | 789 | cfm->recv_fault |= CFM_FAULT_MAID; |
32977975 EJ |
790 | VLOG_WARN_RL(&rl, "%s: Received unexpected remote MAID from MAC " |
791 | ETH_ADDR_FMT, cfm->name, ETH_ADDR_ARGS(eth->eth_src)); | |
f805c4cc | 792 | } else { |
de724029 EJ |
793 | uint8_t ccm_interval = ccm->flags & 0x7; |
794 | bool ccm_rdi = ccm->flags & CCM_RDI_MASK; | |
795 | uint16_t ccm_interval_ms_x = ntohs(ccm->interval_ms_x); | |
796 | ||
797 | struct remote_mp *rmp; | |
348f01e3 | 798 | uint64_t ccm_mpid; |
8210113e | 799 | uint32_t ccm_seq; |
86dc6501 | 800 | bool ccm_opdown; |
2b540ecb | 801 | enum cfm_fault_reason cfm_fault = 0; |
348f01e3 | 802 | |
13b1b2ae | 803 | if (extended) { |
86dc6501 EJ |
804 | ccm_mpid = ntohll(ccm->mpid64); |
805 | ccm_opdown = ccm->opdown; | |
806 | } else { | |
807 | ccm_mpid = ntohs(ccm->mpid); | |
808 | ccm_opdown = false; | |
809 | } | |
8210113e | 810 | ccm_seq = ntohl(ccm->seq); |
b31bcf60 | 811 | |
144216a3 | 812 | if (ccm_interval != cfm->ccm_interval) { |
2b540ecb | 813 | VLOG_WARN_RL(&rl, "%s: received a CCM with an unexpected interval" |
348f01e3 | 814 | " (%"PRIu8") from RMP %"PRIu64, cfm->name, |
144216a3 EJ |
815 | ccm_interval, ccm_mpid); |
816 | } | |
b31bcf60 | 817 | |
13b1b2ae | 818 | if (extended && ccm_interval == 0 |
de724029 | 819 | && ccm_interval_ms_x != cfm->ccm_interval_ms) { |
2b540ecb | 820 | VLOG_WARN_RL(&rl, "%s: received a CCM with an unexpected extended" |
348f01e3 | 821 | " interval (%"PRIu16"ms) from RMP %"PRIu64, cfm->name, |
de724029 EJ |
822 | ccm_interval_ms_x, ccm_mpid); |
823 | } | |
824 | ||
144216a3 | 825 | rmp = lookup_remote_mp(cfm, ccm_mpid); |
86dc6501 EJ |
826 | if (!rmp) { |
827 | if (hmap_count(&cfm->remote_mps) < CFM_MAX_RMPS) { | |
8210113e | 828 | rmp = xzalloc(sizeof *rmp); |
86dc6501 EJ |
829 | hmap_insert(&cfm->remote_mps, &rmp->node, hash_mpid(ccm_mpid)); |
830 | } else { | |
2b540ecb | 831 | cfm_fault |= CFM_FAULT_OVERFLOW; |
86dc6501 EJ |
832 | VLOG_WARN_RL(&rl, |
833 | "%s: dropped CCM with MPID %"PRIu64" from MAC " | |
834 | ETH_ADDR_FMT, cfm->name, ccm_mpid, | |
835 | ETH_ADDR_ARGS(eth->eth_src)); | |
836 | } | |
837 | } | |
838 | ||
2b540ecb MM |
839 | if (ccm_rdi) { |
840 | cfm_fault |= CFM_FAULT_RDI; | |
841 | VLOG_DBG("%s: RDI bit flagged from RMP %"PRIu64, cfm->name, | |
66fb94b5 | 842 | ccm_mpid); |
2b540ecb MM |
843 | } |
844 | ||
8210113e EJ |
845 | VLOG_DBG("%s: received CCM (seq %"PRIu32") (mpid %"PRIu64")" |
846 | " (interval %"PRIu8") (RDI %s)", cfm->name, ccm_seq, | |
847 | ccm_mpid, ccm_interval, ccm_rdi ? "true" : "false"); | |
848 | ||
0dd17bfd | 849 | if (rmp) { |
2b540ecb MM |
850 | if (rmp->mpid == cfm->mpid) { |
851 | cfm_fault |= CFM_FAULT_LOOPBACK; | |
852 | VLOG_WARN_RL(&rl,"%s: received CCM with local MPID" | |
853 | " %"PRIu64, cfm->name, rmp->mpid); | |
854 | } | |
855 | ||
8210113e EJ |
856 | if (rmp->seq && ccm_seq != (rmp->seq + 1)) { |
857 | VLOG_WARN_RL(&rl, "%s: (mpid %"PRIu64") detected sequence" | |
858 | " numbers which indicate possible connectivity" | |
859 | " problems (previous %"PRIu32") (current %"PRIu32 | |
860 | ")", cfm->name, ccm_mpid, rmp->seq, ccm_seq); | |
861 | } | |
862 | ||
144216a3 | 863 | rmp->mpid = ccm_mpid; |
2b540ecb | 864 | if (!cfm_fault) { |
3967a833 | 865 | rmp->num_health_ccm++; |
5767a79a AW |
866 | if (cfm->demand) { |
867 | timer_set_duration(&cfm->demand_rx_ccm_t, | |
868 | 100 * cfm->ccm_interval_ms); | |
869 | } | |
3967a833 | 870 | } |
2b540ecb MM |
871 | rmp->recv = true; |
872 | cfm->recv_fault |= cfm_fault; | |
8210113e | 873 | rmp->seq = ccm_seq; |
86dc6501 | 874 | rmp->opup = !ccm_opdown; |
c3f72482 | 875 | rmp->last_rx = time_msec(); |
f805c4cc | 876 | } |
b31bcf60 | 877 | } |
13b1b2ae EJ |
878 | |
879 | out: | |
880 | ovs_mutex_unlock(&mutex); | |
b31bcf60 | 881 | } |
20c8e971 | 882 | |
88bf179a AW |
883 | /* Returns and resets the 'cfm->status_changed'. */ |
884 | bool | |
885 | cfm_check_status_change(struct cfm *cfm) OVS_EXCLUDED(mutex) | |
886 | { | |
887 | bool ret; | |
888 | ||
889 | ovs_mutex_lock(&mutex); | |
890 | ret = cfm->status_changed; | |
891 | cfm->status_changed = false; | |
892 | ovs_mutex_unlock(&mutex); | |
893 | ||
894 | return ret; | |
895 | } | |
896 | ||
13b1b2ae | 897 | static int |
bd3950dd | 898 | cfm_get_fault__(const struct cfm *cfm) OVS_REQUIRES(mutex) |
a5610457 | 899 | { |
d7243b93 | 900 | if (cfm->fault_override >= 0) { |
b9380396 | 901 | return cfm->fault_override ? CFM_FAULT_OVERRIDE : 0; |
d7243b93 | 902 | } |
a5610457 EJ |
903 | return cfm->fault; |
904 | } | |
905 | ||
13b1b2ae EJ |
906 | /* Gets the fault status of 'cfm'. Returns a bit mask of 'cfm_fault_reason's |
907 | * indicating the cause of the connectivity fault, or zero if there is no | |
908 | * fault. */ | |
909 | int | |
910 | cfm_get_fault(const struct cfm *cfm) OVS_EXCLUDED(mutex) | |
911 | { | |
912 | int fault; | |
913 | ||
914 | ovs_mutex_lock(&mutex); | |
915 | fault = cfm_get_fault__(cfm); | |
916 | ovs_mutex_unlock(&mutex); | |
917 | return fault; | |
918 | } | |
919 | ||
76c4290d AW |
920 | /* Gets the number of cfm fault flapping since start. */ |
921 | uint64_t | |
922 | cfm_get_flap_count(const struct cfm *cfm) OVS_EXCLUDED(mutex) | |
923 | { | |
924 | uint64_t flap_count; | |
925 | ovs_mutex_lock(&mutex); | |
926 | flap_count = cfm->flap_count; | |
927 | ovs_mutex_unlock(&mutex); | |
928 | return flap_count; | |
929 | } | |
930 | ||
3967a833 MM |
931 | /* Gets the health of 'cfm'. Returns an integer between 0 and 100 indicating |
932 | * the health of the link as a percentage of ccm frames received in | |
933 | * CFM_HEALTH_INTERVAL * 'fault_interval' if there is only 1 remote_mpid, | |
934 | * returns 0 if there are no remote_mpids, and returns -1 if there are more | |
935 | * than 1 remote_mpids. */ | |
936 | int | |
13b1b2ae | 937 | cfm_get_health(const struct cfm *cfm) OVS_EXCLUDED(mutex) |
3967a833 | 938 | { |
13b1b2ae EJ |
939 | int health; |
940 | ||
941 | ovs_mutex_lock(&mutex); | |
942 | health = cfm->health; | |
943 | ovs_mutex_unlock(&mutex); | |
944 | return health; | |
3967a833 MM |
945 | } |
946 | ||
685acfd9 AW |
947 | static int |
948 | cfm_get_opup__(const struct cfm *cfm_) OVS_REQUIRES(mutex) | |
949 | { | |
950 | struct cfm *cfm = CONST_CAST(struct cfm *, cfm_); | |
951 | bool extended; | |
952 | ||
7e2b277b | 953 | atomic_read_relaxed(&cfm->extended, &extended); |
685acfd9 AW |
954 | |
955 | return extended ? cfm->remote_opup : -1; | |
956 | } | |
957 | ||
86dc6501 EJ |
958 | /* Gets the operational state of 'cfm'. 'cfm' is considered operationally down |
959 | * if it has received a CCM with the operationally down bit set from any of its | |
4653c558 EJ |
960 | * remote maintenance points. Returns 1 if 'cfm' is operationally up, 0 if |
961 | * 'cfm' is operationally down, or -1 if 'cfm' has no operational state | |
962 | * (because it isn't in extended mode). */ | |
963 | int | |
685acfd9 | 964 | cfm_get_opup(const struct cfm *cfm) OVS_EXCLUDED(mutex) |
86dc6501 | 965 | { |
13b1b2ae EJ |
966 | int opup; |
967 | ||
968 | ovs_mutex_lock(&mutex); | |
685acfd9 | 969 | opup = cfm_get_opup__(cfm); |
13b1b2ae EJ |
970 | ovs_mutex_unlock(&mutex); |
971 | ||
972 | return opup; | |
86dc6501 EJ |
973 | } |
974 | ||
685acfd9 AW |
975 | static void |
976 | cfm_get_remote_mpids__(const struct cfm *cfm, uint64_t **rmps, size_t *n_rmps) | |
977 | OVS_REQUIRES(mutex) | |
978 | { | |
979 | *rmps = xmemdup(cfm->rmps_array, cfm->rmps_array_len * sizeof **rmps); | |
980 | *n_rmps = cfm->rmps_array_len; | |
981 | } | |
982 | ||
1de11730 EJ |
983 | /* Populates 'rmps' with an array of remote maintenance points reachable by |
984 | * 'cfm'. The number of remote maintenance points is written to 'n_rmps'. | |
985 | * 'cfm' retains ownership of the array written to 'rmps' */ | |
986 | void | |
13b1b2ae EJ |
987 | cfm_get_remote_mpids(const struct cfm *cfm, uint64_t **rmps, size_t *n_rmps) |
988 | OVS_EXCLUDED(mutex) | |
1de11730 | 989 | { |
13b1b2ae | 990 | ovs_mutex_lock(&mutex); |
685acfd9 AW |
991 | cfm_get_remote_mpids__(cfm, rmps, n_rmps); |
992 | ovs_mutex_unlock(&mutex); | |
993 | } | |
994 | ||
995 | /* Extracts the status of 'cfm' and fills in the 's'. */ | |
996 | void | |
997 | cfm_get_status(const struct cfm *cfm, struct cfm_status *s) OVS_EXCLUDED(mutex) | |
998 | { | |
999 | ovs_mutex_lock(&mutex); | |
1000 | s->faults = cfm_get_fault__(cfm); | |
1001 | s->remote_opstate = cfm_get_opup__(cfm); | |
1002 | s->flap_count = cfm->flap_count; | |
1003 | s->health = cfm->health; | |
1004 | cfm_get_remote_mpids__(cfm, &s->rmps, &s->n_rmps); | |
13b1b2ae | 1005 | ovs_mutex_unlock(&mutex); |
1de11730 EJ |
1006 | } |
1007 | ||
a5610457 | 1008 | static struct cfm * |
344e21d4 | 1009 | cfm_find(const char *name) OVS_REQUIRES(mutex) |
20c8e971 | 1010 | { |
a5610457 | 1011 | struct cfm *cfm; |
9ac3fce4 | 1012 | |
13b1b2ae | 1013 | HMAP_FOR_EACH_WITH_HASH (cfm, hmap_node, hash_string(name, 0), all_cfms) { |
6f629657 | 1014 | if (!strcmp(cfm->name, name)) { |
a5610457 | 1015 | return cfm; |
9ac3fce4 EJ |
1016 | } |
1017 | } | |
1018 | return NULL; | |
1019 | } | |
1020 | ||
1021 | static void | |
5675cb4c | 1022 | cfm_print_details(struct ds *ds, struct cfm *cfm) OVS_REQUIRES(mutex) |
9ac3fce4 | 1023 | { |
20c8e971 | 1024 | struct remote_mp *rmp; |
13b1b2ae | 1025 | bool extended; |
906bb3d0 | 1026 | int fault; |
20c8e971 | 1027 | |
7e2b277b | 1028 | atomic_read_relaxed(&cfm->extended, &extended); |
13b1b2ae | 1029 | |
ae75dae3 | 1030 | ds_put_format(ds, "---- %s ----\n", cfm->name); |
b9380396 | 1031 | ds_put_format(ds, "MPID %"PRIu64":%s%s\n", cfm->mpid, |
13b1b2ae | 1032 | extended ? " extended" : "", |
b9380396 EJ |
1033 | cfm->fault_override >= 0 ? " fault_override" : ""); |
1034 | ||
13b1b2ae | 1035 | fault = cfm_get_fault__(cfm); |
906bb3d0 | 1036 | if (fault) { |
c3f72482 EJ |
1037 | ds_put_cstr(ds, "\tfault: "); |
1038 | ds_put_cfm_fault(ds, fault); | |
b9380396 EJ |
1039 | ds_put_cstr(ds, "\n"); |
1040 | } | |
9ac3fce4 | 1041 | |
3967a833 MM |
1042 | if (cfm->health == -1) { |
1043 | ds_put_format(ds, "\taverage health: undefined\n"); | |
1044 | } else { | |
1045 | ds_put_format(ds, "\taverage health: %d\n", cfm->health); | |
1046 | } | |
86dc6501 EJ |
1047 | ds_put_format(ds, "\topstate: %s\n", cfm->opup ? "up" : "down"); |
1048 | ds_put_format(ds, "\tremote_opstate: %s\n", | |
1049 | cfm->remote_opup ? "up" : "down"); | |
ae75dae3 JP |
1050 | ds_put_format(ds, "\tinterval: %dms\n", cfm->ccm_interval_ms); |
1051 | ds_put_format(ds, "\tnext CCM tx: %lldms\n", | |
a5610457 | 1052 | timer_msecs_until_expired(&cfm->tx_timer)); |
ae75dae3 | 1053 | ds_put_format(ds, "\tnext fault check: %lldms\n", |
a5610457 | 1054 | timer_msecs_until_expired(&cfm->fault_timer)); |
20c8e971 | 1055 | |
a5610457 | 1056 | HMAP_FOR_EACH (rmp, node, &cfm->remote_mps) { |
2b540ecb | 1057 | ds_put_format(ds, "Remote MPID %"PRIu64"\n", rmp->mpid); |
7593daa2 | 1058 | ds_put_format(ds, "\trecv since check: %s\n", |
dd986e09 | 1059 | rmp->recv ? "true" : "false"); |
86dc6501 | 1060 | ds_put_format(ds, "\topstate: %s\n", rmp->opup? "up" : "down"); |
20c8e971 | 1061 | } |
ae75dae3 JP |
1062 | } |
1063 | ||
1064 | static void | |
0e15264f | 1065 | cfm_unixctl_show(struct unixctl_conn *conn, int argc, const char *argv[], |
13b1b2ae | 1066 | void *aux OVS_UNUSED) OVS_EXCLUDED(mutex) |
ae75dae3 JP |
1067 | { |
1068 | struct ds ds = DS_EMPTY_INITIALIZER; | |
5675cb4c | 1069 | struct cfm *cfm; |
ae75dae3 | 1070 | |
13b1b2ae | 1071 | ovs_mutex_lock(&mutex); |
0e15264f BP |
1072 | if (argc > 1) { |
1073 | cfm = cfm_find(argv[1]); | |
ae75dae3 | 1074 | if (!cfm) { |
bde9f75d | 1075 | unixctl_command_reply_error(conn, "no such CFM object"); |
13b1b2ae | 1076 | goto out; |
ae75dae3 JP |
1077 | } |
1078 | cfm_print_details(&ds, cfm); | |
1079 | } else { | |
13b1b2ae | 1080 | HMAP_FOR_EACH (cfm, hmap_node, all_cfms) { |
ae75dae3 JP |
1081 | cfm_print_details(&ds, cfm); |
1082 | } | |
1083 | } | |
9ac3fce4 | 1084 | |
bde9f75d | 1085 | unixctl_command_reply(conn, ds_cstr(&ds)); |
9ac3fce4 | 1086 | ds_destroy(&ds); |
13b1b2ae EJ |
1087 | out: |
1088 | ovs_mutex_unlock(&mutex); | |
20c8e971 | 1089 | } |
d7243b93 EJ |
1090 | |
1091 | static void | |
1092 | cfm_unixctl_set_fault(struct unixctl_conn *conn, int argc, const char *argv[], | |
13b1b2ae | 1093 | void *aux OVS_UNUSED) OVS_EXCLUDED(mutex) |
d7243b93 EJ |
1094 | { |
1095 | const char *fault_str = argv[argc - 1]; | |
1096 | int fault_override; | |
1097 | struct cfm *cfm; | |
1098 | ||
13b1b2ae | 1099 | ovs_mutex_lock(&mutex); |
d7243b93 EJ |
1100 | if (!strcasecmp("true", fault_str)) { |
1101 | fault_override = 1; | |
1102 | } else if (!strcasecmp("false", fault_str)) { | |
1103 | fault_override = 0; | |
1104 | } else if (!strcasecmp("normal", fault_str)) { | |
1105 | fault_override = -1; | |
1106 | } else { | |
bde9f75d | 1107 | unixctl_command_reply_error(conn, "unknown fault string"); |
13b1b2ae | 1108 | goto out; |
d7243b93 EJ |
1109 | } |
1110 | ||
1111 | if (argc > 2) { | |
1112 | cfm = cfm_find(argv[1]); | |
1113 | if (!cfm) { | |
bde9f75d | 1114 | unixctl_command_reply_error(conn, "no such CFM object"); |
13b1b2ae | 1115 | goto out; |
d7243b93 EJ |
1116 | } |
1117 | cfm->fault_override = fault_override; | |
88bf179a | 1118 | cfm_status_changed(cfm); |
d7243b93 | 1119 | } else { |
13b1b2ae | 1120 | HMAP_FOR_EACH (cfm, hmap_node, all_cfms) { |
d7243b93 | 1121 | cfm->fault_override = fault_override; |
88bf179a | 1122 | cfm_status_changed(cfm); |
d7243b93 EJ |
1123 | } |
1124 | } | |
1125 | ||
bde9f75d | 1126 | unixctl_command_reply(conn, "OK"); |
13b1b2ae EJ |
1127 | |
1128 | out: | |
1129 | ovs_mutex_unlock(&mutex); | |
d7243b93 | 1130 | } |