]>
Commit | Line | Data |
---|---|---|
ad28e79a SW |
1 | /* Zebra Nexthop Group Code. |
2 | * Copyright (C) 2019 Cumulus Networks, Inc. | |
3 | * Donald Sharp | |
4 | * Stephen Worley | |
5 | * | |
6 | * This file is part of FRR. | |
7 | * | |
8 | * FRR is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2, or (at your option) any | |
11 | * later version. | |
12 | * | |
13 | * FRR is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with FRR; see the file COPYING. If not, write to the Free | |
20 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
21 | * 02111-1307, USA. | |
22 | */ | |
23 | #include <zebra.h> | |
24 | ||
25 | #include "lib/nexthop.h" | |
50d89650 | 26 | #include "lib/nexthop_group_private.h" |
ad28e79a | 27 | #include "lib/routemap.h" |
b43434ad | 28 | #include "lib/mpls.h" |
69171da2 | 29 | #include "lib/jhash.h" |
51d80884 | 30 | #include "lib/debug.h" |
ad28e79a SW |
31 | |
32 | #include "zebra/connected.h" | |
33 | #include "zebra/debug.h" | |
34 | #include "zebra/zebra_router.h" | |
35 | #include "zebra/zebra_nhg.h" | |
36 | #include "zebra/zebra_rnh.h" | |
37 | #include "zebra/zebra_routemap.h" | |
51d80884 SW |
38 | #include "zebra/zebra_memory.h" |
39 | #include "zebra/zserv.h" | |
ad28e79a | 40 | #include "zebra/rt.h" |
d9f5b2f5 | 41 | #include "zebra_errors.h" |
0c8215cb | 42 | #include "zebra_dplane.h" |
fe593b78 | 43 | #include "zebra/interface.h" |
d9f5b2f5 | 44 | |
51d80884 | 45 | DEFINE_MTYPE_STATIC(ZEBRA, NHG, "Nexthop Group Entry"); |
a15d4c00 | 46 | DEFINE_MTYPE_STATIC(ZEBRA, NHG_CONNECTED, "Nexthop Group Connected"); |
e22e8001 | 47 | DEFINE_MTYPE_STATIC(ZEBRA, NHG_CTX, "Nexthop Group Context"); |
0c8215cb | 48 | |
38e40db1 SW |
49 | /* id counter to keep in sync with kernel */ |
50 | uint32_t id_counter; | |
51 | ||
8a507796 | 52 | static struct nhg_hash_entry *depends_find(struct nexthop *nh, afi_t afi); |
37c6708b | 53 | static void depends_add(struct nhg_connected_tree_head *head, |
5657e7e9 | 54 | struct nhg_hash_entry *depend); |
38e40db1 SW |
55 | static struct nhg_hash_entry * |
56 | depends_find_add(struct nhg_connected_tree_head *head, struct nexthop *nh, | |
57 | afi_t afi); | |
58 | static struct nhg_hash_entry * | |
59 | depends_find_id_add(struct nhg_connected_tree_head *head, uint32_t id); | |
37c6708b | 60 | static void depends_decrement_free(struct nhg_connected_tree_head *head); |
0c8215cb | 61 | |
e22e8001 | 62 | |
fe593b78 | 63 | void nhg_connected_free(struct nhg_connected *dep) |
0c8215cb | 64 | { |
a15d4c00 | 65 | XFREE(MTYPE_NHG_CONNECTED, dep); |
0c8215cb SW |
66 | } |
67 | ||
fe593b78 | 68 | struct nhg_connected *nhg_connected_new(struct nhg_hash_entry *nhe) |
0c8215cb | 69 | { |
a15d4c00 | 70 | struct nhg_connected *new = NULL; |
0c8215cb | 71 | |
a15d4c00 | 72 | new = XCALLOC(MTYPE_NHG_CONNECTED, sizeof(struct nhg_connected)); |
0c8215cb SW |
73 | new->nhe = nhe; |
74 | ||
75 | return new; | |
76 | } | |
77 | ||
37c6708b | 78 | void nhg_connected_tree_free(struct nhg_connected_tree_head *head) |
0c8215cb | 79 | { |
a15d4c00 | 80 | struct nhg_connected *rb_node_dep = NULL; |
0c8215cb | 81 | |
37c6708b | 82 | if (!nhg_connected_tree_is_empty(head)) { |
fec211ad | 83 | frr_each_safe(nhg_connected_tree, head, rb_node_dep) { |
37c6708b | 84 | nhg_connected_tree_del(head, rb_node_dep); |
fe593b78 SW |
85 | nhg_connected_free(rb_node_dep); |
86 | } | |
0c8215cb | 87 | } |
0c8215cb SW |
88 | } |
89 | ||
37c6708b | 90 | bool nhg_connected_tree_is_empty(const struct nhg_connected_tree_head *head) |
0c8215cb | 91 | { |
fec211ad | 92 | return nhg_connected_tree_count(head) ? false : true; |
0c8215cb SW |
93 | } |
94 | ||
98cda54a | 95 | struct nhg_connected * |
37c6708b | 96 | nhg_connected_tree_root(struct nhg_connected_tree_head *head) |
98cda54a | 97 | { |
37c6708b | 98 | return nhg_connected_tree_first(head); |
98cda54a SW |
99 | } |
100 | ||
37c6708b SW |
101 | void nhg_connected_tree_del_nhe(struct nhg_connected_tree_head *head, |
102 | struct nhg_hash_entry *depend) | |
0c8215cb | 103 | { |
a15d4c00 | 104 | struct nhg_connected lookup = {}; |
085304dc | 105 | struct nhg_connected *remove = NULL; |
0c8215cb SW |
106 | |
107 | lookup.nhe = depend; | |
3119f6a1 | 108 | |
085304dc | 109 | /* Lookup to find the element, then remove it */ |
37c6708b SW |
110 | remove = nhg_connected_tree_find(head, &lookup); |
111 | remove = nhg_connected_tree_del(head, remove); | |
3119f6a1 | 112 | |
085304dc SW |
113 | if (remove) |
114 | nhg_connected_free(remove); | |
3119f6a1 SW |
115 | } |
116 | ||
37c6708b SW |
117 | void nhg_connected_tree_add_nhe(struct nhg_connected_tree_head *head, |
118 | struct nhg_hash_entry *depend) | |
3119f6a1 | 119 | { |
a15d4c00 | 120 | struct nhg_connected *new = NULL; |
0c8215cb | 121 | |
a15d4c00 | 122 | new = nhg_connected_new(depend); |
0c8215cb | 123 | |
18cf7f15 | 124 | if (new) |
37c6708b | 125 | nhg_connected_tree_add(head, new); |
3119f6a1 SW |
126 | } |
127 | ||
37c6708b SW |
128 | static void |
129 | nhg_connected_tree_decrement_ref(struct nhg_connected_tree_head *head) | |
32e29e79 SW |
130 | { |
131 | struct nhg_connected *rb_node_dep = NULL; | |
32e29e79 | 132 | |
fec211ad | 133 | frr_each_safe(nhg_connected_tree, head, rb_node_dep) { |
32e29e79 SW |
134 | zebra_nhg_decrement_ref(rb_node_dep->nhe); |
135 | } | |
136 | } | |
137 | ||
37c6708b SW |
138 | static void |
139 | nhg_connected_tree_increment_ref(struct nhg_connected_tree_head *head) | |
32e29e79 SW |
140 | { |
141 | struct nhg_connected *rb_node_dep = NULL; | |
142 | ||
fec211ad | 143 | frr_each(nhg_connected_tree, head, rb_node_dep) { |
32e29e79 SW |
144 | zebra_nhg_increment_ref(rb_node_dep->nhe); |
145 | } | |
146 | } | |
147 | ||
98cda54a SW |
148 | struct nhg_hash_entry *zebra_nhg_resolve(struct nhg_hash_entry *nhe) |
149 | { | |
150 | if (CHECK_FLAG(nhe->flags, NEXTHOP_GROUP_RECURSIVE) | |
151 | && !zebra_nhg_depends_is_empty(nhe)) { | |
37c6708b | 152 | nhe = nhg_connected_tree_root(&nhe->nhg_depends)->nhe; |
98cda54a SW |
153 | return zebra_nhg_resolve(nhe); |
154 | } | |
155 | ||
156 | return nhe; | |
157 | } | |
158 | ||
159 | uint32_t zebra_nhg_get_resolved_id(uint32_t id) | |
160 | { | |
161 | struct nhg_hash_entry *nhe = NULL; | |
162 | ||
163 | nhe = zebra_nhg_lookup_id(id); | |
164 | ||
165 | if (!nhe) { | |
166 | flog_err( | |
167 | EC_ZEBRA_TABLE_LOOKUP_FAILED, | |
168 | "Zebra failed to lookup a resolved nexthop hash entry id=%u", | |
169 | id); | |
170 | return id; | |
171 | } | |
172 | ||
173 | if (CHECK_FLAG(nhe->flags, NEXTHOP_GROUP_RECURSIVE)) | |
174 | nhe = zebra_nhg_resolve(nhe); | |
175 | ||
176 | return nhe->id; | |
177 | } | |
178 | ||
fe593b78 | 179 | unsigned int zebra_nhg_depends_count(const struct nhg_hash_entry *nhe) |
a15d4c00 | 180 | { |
37c6708b | 181 | return nhg_connected_tree_count(&nhe->nhg_depends); |
a15d4c00 SW |
182 | } |
183 | ||
fe593b78 | 184 | bool zebra_nhg_depends_is_empty(const struct nhg_hash_entry *nhe) |
a15d4c00 | 185 | { |
37c6708b | 186 | return nhg_connected_tree_is_empty(&nhe->nhg_depends); |
a15d4c00 SW |
187 | } |
188 | ||
0c8215cb SW |
189 | void zebra_nhg_depends_del(struct nhg_hash_entry *from, |
190 | struct nhg_hash_entry *depend) | |
3119f6a1 | 191 | { |
37c6708b | 192 | nhg_connected_tree_del_nhe(&from->nhg_depends, depend); |
3119f6a1 SW |
193 | } |
194 | ||
0c8215cb SW |
195 | void zebra_nhg_depends_add(struct nhg_hash_entry *to, |
196 | struct nhg_hash_entry *depend) | |
3119f6a1 | 197 | { |
37c6708b | 198 | nhg_connected_tree_add_nhe(&to->nhg_depends, depend); |
d6e0094f SW |
199 | } |
200 | ||
0c8215cb | 201 | void zebra_nhg_depends_init(struct nhg_hash_entry *nhe) |
148a0103 | 202 | { |
37c6708b | 203 | nhg_connected_tree_init(&nhe->nhg_depends); |
148a0103 SW |
204 | } |
205 | ||
21615102 SW |
206 | /* Release this nhe from anything that it depends on */ |
207 | static void zebra_nhg_depends_release(struct nhg_hash_entry *nhe) | |
208 | { | |
209 | if (!zebra_nhg_depends_is_empty(nhe)) { | |
210 | struct nhg_connected *rb_node_dep = NULL; | |
21615102 | 211 | |
fec211ad | 212 | frr_each_safe(nhg_connected_tree, &nhe->nhg_depends, |
37c6708b | 213 | rb_node_dep) { |
21615102 SW |
214 | zebra_nhg_dependents_del(rb_node_dep->nhe, nhe); |
215 | } | |
216 | } | |
217 | } | |
218 | ||
fe593b78 SW |
219 | unsigned int zebra_nhg_dependents_count(const struct nhg_hash_entry *nhe) |
220 | { | |
37c6708b | 221 | return nhg_connected_tree_count(&nhe->nhg_dependents); |
fe593b78 SW |
222 | } |
223 | ||
224 | bool zebra_nhg_dependents_is_empty(const struct nhg_hash_entry *nhe) | |
225 | { | |
37c6708b | 226 | return nhg_connected_tree_is_empty(&nhe->nhg_dependents); |
fe593b78 SW |
227 | } |
228 | ||
fe593b78 SW |
229 | void zebra_nhg_dependents_del(struct nhg_hash_entry *from, |
230 | struct nhg_hash_entry *dependent) | |
231 | { | |
37c6708b | 232 | nhg_connected_tree_del_nhe(&from->nhg_dependents, dependent); |
fe593b78 SW |
233 | } |
234 | ||
fe593b78 SW |
235 | void zebra_nhg_dependents_add(struct nhg_hash_entry *to, |
236 | struct nhg_hash_entry *dependent) | |
237 | { | |
37c6708b | 238 | nhg_connected_tree_add_nhe(&to->nhg_dependents, dependent); |
fe593b78 SW |
239 | } |
240 | ||
fe593b78 SW |
241 | void zebra_nhg_dependents_init(struct nhg_hash_entry *nhe) |
242 | { | |
37c6708b | 243 | nhg_connected_tree_init(&nhe->nhg_dependents); |
fe593b78 SW |
244 | } |
245 | ||
21615102 SW |
246 | /* Release this nhe from anything depending on it */ |
247 | static void zebra_nhg_dependents_release(struct nhg_hash_entry *nhe) | |
248 | { | |
249 | if (!zebra_nhg_dependents_is_empty(nhe)) { | |
250 | struct nhg_connected *rb_node_dep = NULL; | |
21615102 | 251 | |
fec211ad | 252 | frr_each_safe(nhg_connected_tree, &nhe->nhg_dependents, |
37c6708b | 253 | rb_node_dep) { |
21615102 SW |
254 | zebra_nhg_depends_del(rb_node_dep->nhe, nhe); |
255 | } | |
256 | } | |
257 | } | |
258 | ||
d9f5b2f5 SW |
259 | struct nhg_hash_entry *zebra_nhg_lookup_id(uint32_t id) |
260 | { | |
0c8215cb | 261 | struct nhg_hash_entry lookup = {}; |
d9f5b2f5 SW |
262 | |
263 | lookup.id = id; | |
264 | return hash_lookup(zrouter.nhgs_id, &lookup); | |
265 | } | |
266 | ||
d9f5b2f5 SW |
267 | int zebra_nhg_insert_id(struct nhg_hash_entry *nhe) |
268 | { | |
269 | if (hash_lookup(zrouter.nhgs_id, nhe)) { | |
270 | flog_err( | |
271 | EC_ZEBRA_NHG_TABLE_INSERT_FAILED, | |
272 | "Failed inserting NHG id=%u into the ID hash table, entry already exists", | |
273 | nhe->id); | |
274 | return -1; | |
275 | } | |
276 | ||
277 | hash_get(zrouter.nhgs_id, nhe, hash_alloc_intern); | |
278 | ||
279 | return 0; | |
280 | } | |
ad28e79a | 281 | |
38e40db1 SW |
282 | static void |
283 | zebra_nhg_connect_depends(struct nhg_hash_entry *nhe, | |
284 | struct nhg_connected_tree_head nhg_depends) | |
4e49c8b8 | 285 | { |
a15d4c00 SW |
286 | struct nhg_connected *rb_node_dep = NULL; |
287 | ||
38e40db1 SW |
288 | /* This has been allocated higher above in the stack. Could probably |
289 | * re-allocate and free the old stuff but just using the same memory | |
290 | * for now. Otherwise, their might be a time trade-off for repeated | |
291 | * alloc/frees as startup. | |
292 | */ | |
293 | nhe->nhg_depends = nhg_depends; | |
4e49c8b8 | 294 | |
a15d4c00 | 295 | /* Attach backpointer to anything that it depends on */ |
fe593b78 | 296 | zebra_nhg_dependents_init(nhe); |
a15d4c00 | 297 | if (!zebra_nhg_depends_is_empty(nhe)) { |
fec211ad | 298 | frr_each(nhg_connected_tree, &nhe->nhg_depends, rb_node_dep) { |
a15d4c00 SW |
299 | zebra_nhg_dependents_add(rb_node_dep->nhe, nhe); |
300 | } | |
301 | } | |
4e49c8b8 | 302 | |
7b683a96 | 303 | /* Add the ifp now if its not a group or recursive and has ifindex */ |
a6e6a6d8 SW |
304 | if (zebra_nhg_depends_is_empty(nhe) && nhe->nhg->nexthop |
305 | && nhe->nhg->nexthop->ifindex) { | |
7b683a96 SW |
306 | struct interface *ifp = NULL; |
307 | ||
a6e6a6d8 SW |
308 | ifp = if_lookup_by_index(nhe->nhg->nexthop->ifindex, |
309 | nhe->vrf_id); | |
7f1abf79 SW |
310 | if (ifp) |
311 | zebra_nhg_set_if(nhe, ifp); | |
312 | else | |
313 | flog_err( | |
314 | EC_ZEBRA_IF_LOOKUP_FAILED, | |
315 | "Zebra failed to lookup an interface with ifindex=%d in vrf=%u for NHE id=%u", | |
316 | nhe->nhg->nexthop->ifindex, nhe->vrf_id, | |
317 | nhe->id); | |
7b683a96 | 318 | } |
38e40db1 SW |
319 | } |
320 | ||
321 | static struct nhg_hash_entry *zebra_nhg_copy(struct nhg_hash_entry *copy, | |
322 | uint32_t id) | |
323 | { | |
324 | struct nhg_hash_entry *nhe; | |
325 | ||
326 | nhe = XCALLOC(MTYPE_NHG, sizeof(struct nhg_hash_entry)); | |
327 | ||
328 | nhe->id = id; | |
329 | ||
330 | nhe->nhg = nexthop_group_new(); | |
331 | nexthop_group_copy(nhe->nhg, copy->nhg); | |
332 | ||
333 | nhe->vrf_id = copy->vrf_id; | |
334 | nhe->afi = copy->afi; | |
335 | nhe->type = copy->type ? copy->type : ZEBRA_ROUTE_NHG; | |
336 | nhe->refcnt = 0; | |
337 | nhe->dplane_ref = zebra_router_get_next_sequence(); | |
338 | ||
339 | return nhe; | |
340 | } | |
341 | ||
342 | /* Allocation via hash handler */ | |
343 | static void *zebra_nhg_hash_alloc(void *arg) | |
344 | { | |
345 | struct nhg_hash_entry *nhe = NULL; | |
346 | struct nhg_hash_entry *copy = arg; | |
7b683a96 | 347 | |
38e40db1 | 348 | nhe = zebra_nhg_copy(copy, copy->id); |
9ef49038 SW |
349 | |
350 | /* Mark duplicate nexthops in a group at creation time. */ | |
351 | nexthop_group_mark_duplicates(nhe->nhg); | |
352 | ||
38e40db1 | 353 | zebra_nhg_connect_depends(nhe, copy->nhg_depends); |
d9f5b2f5 SW |
354 | zebra_nhg_insert_id(nhe); |
355 | ||
4e49c8b8 DS |
356 | return nhe; |
357 | } | |
358 | ||
4e49c8b8 DS |
359 | uint32_t zebra_nhg_hash_key(const void *arg) |
360 | { | |
361 | const struct nhg_hash_entry *nhe = arg; | |
d9f5b2f5 | 362 | |
7286ac02 | 363 | uint32_t key = 0x5a351234; |
4e49c8b8 | 364 | |
62991a11 SW |
365 | key = jhash_3words(nhe->vrf_id, nhe->afi, nexthop_group_hash(nhe->nhg), |
366 | key); | |
d9f5b2f5 | 367 | |
d9f5b2f5 | 368 | return key; |
4e49c8b8 DS |
369 | } |
370 | ||
a95b8020 SW |
371 | uint32_t zebra_nhg_id_key(const void *arg) |
372 | { | |
373 | const struct nhg_hash_entry *nhe = arg; | |
374 | ||
375 | return nhe->id; | |
376 | } | |
377 | ||
4e49c8b8 DS |
378 | bool zebra_nhg_hash_equal(const void *arg1, const void *arg2) |
379 | { | |
380 | const struct nhg_hash_entry *nhe1 = arg1; | |
381 | const struct nhg_hash_entry *nhe2 = arg2; | |
4e49c8b8 | 382 | |
98cda54a SW |
383 | /* No matter what if they equal IDs, assume equal */ |
384 | if (nhe1->id && nhe2->id && (nhe1->id == nhe2->id)) | |
385 | return true; | |
386 | ||
4e49c8b8 DS |
387 | if (nhe1->vrf_id != nhe2->vrf_id) |
388 | return false; | |
389 | ||
77b76fc9 SW |
390 | if (nhe1->afi != nhe2->afi) |
391 | return false; | |
392 | ||
98cda54a SW |
393 | if (nexthop_group_active_nexthop_num_no_recurse(nhe1->nhg) |
394 | != nexthop_group_active_nexthop_num_no_recurse(nhe2->nhg)) | |
395 | return false; | |
396 | ||
2001be6c | 397 | if (!nexthop_group_equal_no_recurse(nhe1->nhg, nhe2->nhg)) |
e4ac313b SW |
398 | return false; |
399 | ||
4e49c8b8 DS |
400 | return true; |
401 | } | |
402 | ||
d9f5b2f5 | 403 | bool zebra_nhg_hash_id_equal(const void *arg1, const void *arg2) |
4e49c8b8 | 404 | { |
d9f5b2f5 SW |
405 | const struct nhg_hash_entry *nhe1 = arg1; |
406 | const struct nhg_hash_entry *nhe2 = arg2; | |
4e49c8b8 | 407 | |
d9f5b2f5 SW |
408 | return nhe1->id == nhe2->id; |
409 | } | |
4e49c8b8 | 410 | |
1b366e63 SW |
411 | static int zebra_nhg_process_grp(struct nexthop_group *nhg, |
412 | struct nhg_connected_tree_head *depends, | |
413 | struct nh_grp *grp, uint8_t count) | |
e22e8001 | 414 | { |
37c6708b | 415 | nhg_connected_tree_init(depends); |
e22e8001 SW |
416 | |
417 | for (int i = 0; i < count; i++) { | |
418 | struct nhg_hash_entry *depend = NULL; | |
419 | /* We do not care about nexthop_grp.weight at | |
420 | * this time. But we should figure out | |
421 | * how to adapt this to our code in | |
422 | * the future. | |
423 | */ | |
38e40db1 | 424 | depend = depends_find_id_add(depends, grp[i].id); |
e22e8001 | 425 | |
38e40db1 | 426 | if (!depend) { |
e22e8001 SW |
427 | flog_err( |
428 | EC_ZEBRA_NHG_SYNC, | |
429 | "Received Nexthop Group from the kernel with a dependent Nexthop ID (%u) which we do not have in our table", | |
430 | grp[i].id); | |
1b366e63 | 431 | return -1; |
e22e8001 | 432 | } |
38e40db1 SW |
433 | |
434 | /* | |
435 | * If this is a nexthop with its own group | |
436 | * dependencies, add them as well. Not sure its | |
437 | * even possible to have a group within a group | |
438 | * in the kernel. | |
439 | */ | |
440 | ||
441 | copy_nexthops(&nhg->nexthop, depend->nhg->nexthop, NULL); | |
e22e8001 | 442 | } |
1b366e63 SW |
443 | |
444 | return 0; | |
e22e8001 SW |
445 | } |
446 | ||
6384cbcb SW |
447 | static void handle_recursive_depend(struct nhg_connected_tree_head *nhg_depends, |
448 | struct nexthop *nh, afi_t afi) | |
449 | { | |
450 | struct nhg_hash_entry *depend = NULL; | |
451 | struct nexthop_group resolved_ng = {}; | |
452 | ||
453 | _nexthop_group_add_sorted(&resolved_ng, nh); | |
454 | ||
455 | depend = zebra_nhg_rib_find(0, &resolved_ng, afi); | |
456 | depends_add(nhg_depends, depend); | |
457 | } | |
e22e8001 | 458 | |
4505578b SW |
459 | static bool zebra_nhg_find(struct nhg_hash_entry **nhe, uint32_t id, |
460 | struct nexthop_group *nhg, | |
37c6708b | 461 | struct nhg_connected_tree_head *nhg_depends, |
38e40db1 | 462 | vrf_id_t vrf_id, afi_t afi, int type) |
a95b8020 | 463 | { |
0c8215cb | 464 | struct nhg_hash_entry lookup = {}; |
5bd81e4c | 465 | |
e22e8001 | 466 | uint32_t old_id_counter = id_counter; |
5bd81e4c | 467 | |
4505578b | 468 | bool created = false; |
6384cbcb | 469 | bool recursive = false; |
4505578b | 470 | |
38e40db1 SW |
471 | /* |
472 | * If it has an id at this point, we must have gotten it from the kernel | |
473 | */ | |
474 | lookup.id = id ? id : ++id_counter; | |
a95b8020 | 475 | |
9a1588c4 | 476 | lookup.type = type ? type : ZEBRA_ROUTE_NHG; |
e22e8001 SW |
477 | lookup.nhg = nhg; |
478 | ||
6384cbcb SW |
479 | if (lookup.nhg->nexthop->next) { |
480 | /* Groups can have all vrfs and AF's in them */ | |
481 | lookup.afi = AFI_UNSPEC; | |
482 | lookup.vrf_id = 0; | |
483 | } else { | |
4d21c7c0 SW |
484 | switch (lookup.nhg->nexthop->type) { |
485 | case (NEXTHOP_TYPE_IFINDEX): | |
486 | case (NEXTHOP_TYPE_BLACKHOLE): | |
487 | /* | |
488 | * This switch case handles setting the afi different | |
489 | * for ipv4/v6 routes. Ifindex/blackhole nexthop | |
490 | * objects cannot be ambiguous, they must be Address | |
491 | * Family specific. If we get here, we will either use | |
492 | * the AF of the route, or the one we got passed from | |
493 | * here from the kernel. | |
494 | */ | |
495 | lookup.afi = afi; | |
496 | break; | |
497 | case (NEXTHOP_TYPE_IPV4_IFINDEX): | |
498 | case (NEXTHOP_TYPE_IPV4): | |
499 | lookup.afi = AFI_IP; | |
500 | break; | |
501 | case (NEXTHOP_TYPE_IPV6_IFINDEX): | |
502 | case (NEXTHOP_TYPE_IPV6): | |
503 | lookup.afi = AFI_IP6; | |
504 | break; | |
505 | } | |
506 | ||
6384cbcb SW |
507 | lookup.vrf_id = vrf_id; |
508 | } | |
a95b8020 | 509 | |
b599cd2a | 510 | if (id) |
4505578b | 511 | (*nhe) = zebra_nhg_lookup_id(id); |
b599cd2a | 512 | else |
4505578b | 513 | (*nhe) = hash_lookup(zrouter.nhgs, &lookup); |
d9f5b2f5 | 514 | |
5bd81e4c | 515 | /* If it found an nhe in our tables, this new ID is unused */ |
4505578b | 516 | if (*nhe) |
5bd81e4c SW |
517 | id_counter = old_id_counter; |
518 | ||
4505578b | 519 | if (!(*nhe)) { |
6384cbcb SW |
520 | /* Only hash/lookup the depends if the first lookup |
521 | * fails to find something. This should hopefully save a | |
522 | * lot of cycles for larger ecmp sizes. | |
523 | */ | |
524 | if (nhg_depends) | |
525 | /* If you don't want to hash on each nexthop in the | |
526 | * nexthop group struct you can pass the depends | |
527 | * directly. Kernel-side we do this since it just looks | |
528 | * them up via IDs. | |
529 | */ | |
530 | lookup.nhg_depends = *nhg_depends; | |
531 | else { | |
532 | if (nhg->nexthop->next) { | |
533 | nhg_connected_tree_init(&lookup.nhg_depends); | |
534 | ||
535 | /* If its a group, create a dependency tree */ | |
536 | struct nexthop *nh = NULL; | |
537 | ||
538 | for (nh = nhg->nexthop; nh; nh = nh->next) | |
539 | depends_find_add(&lookup.nhg_depends, | |
540 | nh, afi); | |
541 | } else if (CHECK_FLAG(nhg->nexthop->flags, | |
542 | NEXTHOP_FLAG_RECURSIVE)) { | |
543 | nhg_connected_tree_init(&lookup.nhg_depends); | |
544 | handle_recursive_depend(&lookup.nhg_depends, | |
545 | nhg->nexthop->resolved, | |
546 | afi); | |
547 | recursive = true; | |
548 | } | |
549 | } | |
550 | ||
38e40db1 | 551 | (*nhe) = hash_get(zrouter.nhgs, &lookup, zebra_nhg_hash_alloc); |
4505578b | 552 | created = true; |
d9f5b2f5 | 553 | |
6384cbcb SW |
554 | if (recursive) |
555 | SET_FLAG((*nhe)->flags, NEXTHOP_GROUP_RECURSIVE); | |
556 | } | |
4505578b | 557 | return created; |
a95b8020 SW |
558 | } |
559 | ||
e22e8001 | 560 | /* Find/create a single nexthop */ |
6384cbcb SW |
561 | static struct nhg_hash_entry * |
562 | zebra_nhg_find_nexthop(uint32_t id, struct nexthop *nh, afi_t afi, int type) | |
3057df51 | 563 | { |
6384cbcb | 564 | struct nhg_hash_entry *nhe = NULL; |
e22e8001 SW |
565 | struct nexthop_group nhg = {}; |
566 | ||
567 | _nexthop_group_add_sorted(&nhg, nh); | |
568 | ||
6384cbcb | 569 | zebra_nhg_find(&nhe, id, &nhg, NULL, nh->vrf_id, afi, 0); |
8a507796 | 570 | |
6384cbcb | 571 | return nhe; |
e22e8001 SW |
572 | } |
573 | ||
574 | static struct nhg_ctx *nhg_ctx_new() | |
575 | { | |
576 | struct nhg_ctx *new = NULL; | |
577 | ||
578 | new = XCALLOC(MTYPE_NHG_CTX, sizeof(struct nhg_ctx)); | |
579 | ||
580 | return new; | |
581 | } | |
582 | ||
583 | static void nhg_ctx_free(struct nhg_ctx *ctx) | |
584 | { | |
585 | XFREE(MTYPE_NHG_CTX, ctx); | |
586 | } | |
587 | ||
10200d40 SW |
588 | static uint32_t nhg_ctx_get_id(const struct nhg_ctx *ctx) |
589 | { | |
590 | return ctx->id; | |
591 | } | |
592 | ||
1b366e63 | 593 | static void nhg_ctx_set_status(struct nhg_ctx *ctx, enum nhg_ctx_status status) |
e22e8001 SW |
594 | { |
595 | ctx->status = status; | |
596 | } | |
597 | ||
1b366e63 | 598 | static enum nhg_ctx_status nhg_ctx_get_status(const struct nhg_ctx *ctx) |
e22e8001 SW |
599 | { |
600 | return ctx->status; | |
601 | } | |
602 | ||
603 | static void nhg_ctx_set_op(struct nhg_ctx *ctx, enum nhg_ctx_op_e op) | |
604 | { | |
605 | ctx->op = op; | |
606 | } | |
607 | ||
608 | static enum nhg_ctx_op_e nhg_ctx_get_op(const struct nhg_ctx *ctx) | |
609 | { | |
610 | return ctx->op; | |
611 | } | |
612 | ||
10200d40 SW |
613 | static vrf_id_t nhg_ctx_get_vrf_id(const struct nhg_ctx *ctx) |
614 | { | |
615 | return ctx->vrf_id; | |
616 | } | |
617 | ||
618 | static int nhg_ctx_get_type(const struct nhg_ctx *ctx) | |
619 | { | |
620 | return ctx->type; | |
621 | } | |
622 | ||
623 | static int nhg_ctx_get_afi(const struct nhg_ctx *ctx) | |
624 | { | |
625 | return ctx->afi; | |
626 | } | |
627 | ||
628 | static struct nexthop *nhg_ctx_get_nh(struct nhg_ctx *ctx) | |
629 | { | |
630 | return &ctx->u.nh; | |
631 | } | |
632 | ||
633 | static uint8_t nhg_ctx_get_count(const struct nhg_ctx *ctx) | |
634 | { | |
635 | return ctx->count; | |
636 | } | |
637 | ||
638 | static struct nh_grp *nhg_ctx_get_grp(struct nhg_ctx *ctx) | |
639 | { | |
640 | return ctx->u.grp; | |
641 | } | |
642 | ||
81505946 SW |
643 | static struct nhg_ctx *nhg_ctx_init(uint32_t id, struct nexthop *nh, |
644 | struct nh_grp *grp, vrf_id_t vrf_id, | |
645 | afi_t afi, int type, uint8_t count) | |
646 | { | |
647 | struct nhg_ctx *ctx = NULL; | |
648 | ||
649 | ctx = nhg_ctx_new(); | |
650 | ||
651 | ctx->id = id; | |
652 | ctx->vrf_id = vrf_id; | |
653 | ctx->afi = afi; | |
654 | ctx->type = type; | |
655 | ctx->count = count; | |
656 | ||
657 | if (count) | |
658 | /* Copy over the array */ | |
659 | memcpy(&ctx->u.grp, grp, count * sizeof(struct nh_grp)); | |
660 | else if (nh) | |
661 | ctx->u.nh = *nh; | |
662 | ||
663 | return ctx; | |
664 | } | |
665 | ||
38e40db1 SW |
666 | static bool zebra_nhg_contains_dup(struct nhg_hash_entry *nhe) |
667 | { | |
668 | struct nhg_connected *rb_node_dep = NULL; | |
669 | ||
fec211ad | 670 | frr_each(nhg_connected_tree, &nhe->nhg_depends, rb_node_dep) { |
38e40db1 SW |
671 | if (CHECK_FLAG(rb_node_dep->nhe->flags, |
672 | NEXTHOP_GROUP_DUPLICATE)) | |
673 | return true; | |
674 | } | |
675 | ||
676 | return false; | |
677 | } | |
678 | ||
679 | static void zebra_nhg_set_dup(struct nhg_hash_entry *nhe) | |
680 | { | |
681 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_DUPLICATE); | |
682 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED); | |
683 | ||
684 | flog_warn(EC_ZEBRA_DUPLICATE_NHG_MESSAGE, | |
685 | "Nexthop Group with ID (%d) is a duplicate, ignoring", | |
686 | nhe->id); | |
687 | } | |
688 | ||
9a1588c4 SW |
689 | /* |
690 | * Release from the non-ID hash'd table. | |
691 | * | |
692 | * Basically, we are saying don't let routes use this anymore, | |
693 | * because we are removing it. | |
694 | */ | |
695 | static void zebra_nhg_release_no_id(struct nhg_hash_entry *nhe) | |
696 | { | |
697 | /* Remove it from any lists it may be on */ | |
698 | zebra_nhg_depends_release(nhe); | |
699 | zebra_nhg_dependents_release(nhe); | |
700 | if (nhe->ifp) | |
701 | if_nhg_dependents_del(nhe->ifp, nhe); | |
702 | ||
703 | /* | |
704 | * If its a dup, we didn't store it here and have to be | |
705 | * sure we don't clear one thats actually being used. | |
706 | */ | |
707 | if (!CHECK_FLAG(nhe->flags, NEXTHOP_GROUP_DUPLICATE)) | |
708 | hash_release(zrouter.nhgs, nhe); | |
709 | } | |
710 | ||
711 | static void zebra_nhg_release_id(struct nhg_hash_entry *nhe) | |
712 | { | |
713 | hash_release(zrouter.nhgs_id, nhe); | |
714 | } | |
715 | ||
716 | ||
717 | static void zebra_nhg_handle_uninstall(struct nhg_hash_entry *nhe) | |
718 | { | |
719 | zebra_nhg_release_id(nhe); | |
720 | zebra_nhg_free(nhe); | |
721 | } | |
722 | ||
723 | /* | |
724 | * The kernel/other program has changed the state of a nexthop object we are | |
725 | * using. | |
726 | */ | |
727 | static void zebra_nhg_handle_kernel_state_change(struct nhg_hash_entry *nhe, | |
728 | bool is_delete) | |
729 | { | |
730 | if (nhe->refcnt) { | |
731 | flog_err( | |
732 | EC_ZEBRA_NHG_SYNC, | |
733 | "Kernel %s a nexthop group with ID (%u) that we are still using for a route, sending it back down", | |
734 | (is_delete ? "deleted" : "updated"), nhe->id); | |
735 | ||
736 | UNSET_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED); | |
737 | zebra_nhg_install_kernel(nhe); | |
738 | } else { | |
739 | zebra_nhg_release_no_id(nhe); | |
740 | zebra_nhg_handle_uninstall(nhe); | |
741 | } | |
742 | } | |
743 | ||
e22e8001 SW |
744 | static int nhg_ctx_process_new(struct nhg_ctx *ctx) |
745 | { | |
746 | struct nexthop_group *nhg = NULL; | |
37c6708b | 747 | struct nhg_connected_tree_head nhg_depends = {}; |
9a1588c4 | 748 | struct nhg_hash_entry *lookup = NULL; |
3057df51 SW |
749 | struct nhg_hash_entry *nhe = NULL; |
750 | ||
10200d40 SW |
751 | uint32_t id = nhg_ctx_get_id(ctx); |
752 | uint8_t count = nhg_ctx_get_count(ctx); | |
753 | vrf_id_t vrf_id = nhg_ctx_get_vrf_id(ctx); | |
754 | int type = nhg_ctx_get_type(ctx); | |
755 | afi_t afi = nhg_ctx_get_afi(ctx); | |
756 | ||
757 | lookup = zebra_nhg_lookup_id(id); | |
9a1588c4 SW |
758 | |
759 | if (lookup) { | |
760 | /* This is already present in our table, hence an update | |
761 | * that we did not initate. | |
762 | */ | |
763 | zebra_nhg_handle_kernel_state_change(lookup, false); | |
764 | return 0; | |
765 | } | |
766 | ||
10200d40 | 767 | if (nhg_ctx_get_count(ctx)) { |
e22e8001 | 768 | nhg = nexthop_group_new(); |
1b366e63 SW |
769 | if (zebra_nhg_process_grp(nhg, &nhg_depends, |
770 | nhg_ctx_get_grp(ctx), count)) { | |
771 | depends_decrement_free(&nhg_depends); | |
d3a35138 | 772 | nexthop_group_delete(&nhg); |
fec211ad | 773 | return -ENOENT; |
1b366e63 SW |
774 | } |
775 | ||
10200d40 SW |
776 | if (!zebra_nhg_find(&nhe, id, nhg, &nhg_depends, vrf_id, type, |
777 | afi)) | |
38e40db1 | 778 | depends_decrement_free(&nhg_depends); |
4505578b | 779 | |
e22e8001 | 780 | /* These got copied over in zebra_nhg_alloc() */ |
d3a35138 | 781 | nexthop_group_delete(&nhg); |
38e40db1 | 782 | } else |
10200d40 SW |
783 | nhe = zebra_nhg_find_nexthop(id, nhg_ctx_get_nh(ctx), afi, |
784 | type); | |
e22e8001 SW |
785 | |
786 | if (nhe) { | |
10200d40 | 787 | if (id != nhe->id) { |
38e40db1 SW |
788 | struct nhg_hash_entry *kernel_nhe = NULL; |
789 | ||
e22e8001 | 790 | /* Duplicate but with different ID from |
2d3c57e6 SW |
791 | * the kernel |
792 | */ | |
e22e8001 SW |
793 | |
794 | /* The kernel allows duplicate nexthops | |
795 | * as long as they have different IDs. | |
796 | * We are ignoring those to prevent | |
797 | * syncing problems with the kernel | |
798 | * changes. | |
38e40db1 SW |
799 | * |
800 | * We maintain them *ONLY* in the ID hash table to | |
801 | * track them. | |
802 | */ | |
803 | ||
10200d40 | 804 | kernel_nhe = zebra_nhg_copy(nhe, id); |
38e40db1 SW |
805 | zebra_nhg_insert_id(kernel_nhe); |
806 | zebra_nhg_set_dup(kernel_nhe); | |
807 | } else if (zebra_nhg_contains_dup(nhe)) { | |
808 | /* The group we got contains a duplciate depend, | |
809 | * so lets mark this group as a dup as well and release | |
810 | * it from the non-ID hash. | |
e22e8001 | 811 | */ |
38e40db1 SW |
812 | hash_release(zrouter.nhgs, nhe); |
813 | zebra_nhg_set_dup(nhe); | |
814 | } else { | |
e22e8001 | 815 | /* It actually created a new nhe */ |
38e40db1 SW |
816 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_VALID); |
817 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED); | |
e22e8001 SW |
818 | } |
819 | } else { | |
820 | flog_err( | |
821 | EC_ZEBRA_TABLE_LOOKUP_FAILED, | |
822 | "Zebra failed to find or create a nexthop hash entry for ID (%u)", | |
10200d40 | 823 | id); |
e22e8001 SW |
824 | return -1; |
825 | } | |
826 | ||
827 | return 0; | |
828 | } | |
829 | ||
9a1588c4 SW |
830 | static int nhg_ctx_process_del(struct nhg_ctx *ctx) |
831 | { | |
832 | struct nhg_hash_entry *nhe = NULL; | |
10200d40 | 833 | uint32_t id = nhg_ctx_get_id(ctx); |
9a1588c4 | 834 | |
10200d40 | 835 | nhe = zebra_nhg_lookup_id(id); |
9a1588c4 SW |
836 | |
837 | if (!nhe) { | |
838 | flog_warn( | |
839 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
840 | "Kernel delete message received for nexthop group ID (%u) that we do not have in our ID table", | |
10200d40 | 841 | id); |
81505946 | 842 | return -1; |
9a1588c4 SW |
843 | } |
844 | ||
845 | zebra_nhg_handle_kernel_state_change(nhe, true); | |
846 | ||
847 | return 0; | |
848 | } | |
849 | ||
e22e8001 SW |
850 | static void nhg_ctx_process_finish(struct nhg_ctx *ctx) |
851 | { | |
3e347f41 SW |
852 | struct nexthop *nh; |
853 | ||
e22e8001 SW |
854 | /* |
855 | * Just freeing for now, maybe do something more in the future | |
856 | * based on flag. | |
857 | */ | |
858 | ||
3e347f41 SW |
859 | if (nhg_ctx_get_count(ctx)) |
860 | goto done; | |
861 | ||
862 | nh = nhg_ctx_get_nh(ctx); | |
863 | ||
864 | nexthop_del_labels(nh); | |
865 | ||
866 | done: | |
e22e8001 SW |
867 | if (ctx) |
868 | nhg_ctx_free(ctx); | |
869 | } | |
870 | ||
1b366e63 SW |
871 | static int queue_add(struct nhg_ctx *ctx) |
872 | { | |
873 | /* If its queued or already processed do nothing */ | |
874 | if (nhg_ctx_get_status(ctx) == NHG_CTX_QUEUED) | |
875 | return 0; | |
876 | ||
877 | if (rib_queue_nhg_add(ctx)) { | |
878 | nhg_ctx_set_status(ctx, NHG_CTX_FAILURE); | |
879 | return -1; | |
880 | } | |
881 | ||
882 | nhg_ctx_set_status(ctx, NHG_CTX_QUEUED); | |
883 | ||
884 | return 0; | |
885 | } | |
886 | ||
e22e8001 SW |
887 | int nhg_ctx_process(struct nhg_ctx *ctx) |
888 | { | |
889 | int ret = 0; | |
890 | ||
891 | switch (nhg_ctx_get_op(ctx)) { | |
892 | case NHG_CTX_OP_NEW: | |
893 | ret = nhg_ctx_process_new(ctx); | |
fec211ad | 894 | if (nhg_ctx_get_count(ctx) && ret == -ENOENT |
1b366e63 SW |
895 | && nhg_ctx_get_status(ctx) != NHG_CTX_REQUEUED) { |
896 | /* Depends probably came before group, re-queue. | |
897 | * | |
898 | * Only going to retry once, hence just using status | |
899 | * flag rather than counter. | |
900 | */ | |
901 | nhg_ctx_set_status(ctx, NHG_CTX_NONE); | |
902 | if (queue_add(ctx) == 0) { | |
903 | nhg_ctx_set_status(ctx, NHG_CTX_REQUEUED); | |
904 | return 0; | |
905 | } | |
906 | } | |
e22e8001 SW |
907 | break; |
908 | case NHG_CTX_OP_DEL: | |
9a1588c4 | 909 | ret = nhg_ctx_process_del(ctx); |
e22e8001 SW |
910 | case NHG_CTX_OP_NONE: |
911 | break; | |
912 | } | |
913 | ||
914 | nhg_ctx_set_status(ctx, (ret ? NHG_CTX_FAILURE : NHG_CTX_SUCCESS)); | |
915 | ||
916 | nhg_ctx_process_finish(ctx); | |
917 | ||
918 | return ret; | |
919 | } | |
3057df51 | 920 | |
e22e8001 SW |
921 | /* Kernel-side, you either get a single new nexthop or a array of ID's */ |
922 | int zebra_nhg_kernel_find(uint32_t id, struct nexthop *nh, struct nh_grp *grp, | |
38e40db1 SW |
923 | uint8_t count, vrf_id_t vrf_id, afi_t afi, int type, |
924 | int startup) | |
e22e8001 | 925 | { |
e22e8001 SW |
926 | struct nhg_ctx *ctx = NULL; |
927 | ||
38e40db1 SW |
928 | if (id > id_counter) |
929 | /* Increase our counter so we don't try to create | |
930 | * an ID that already exists | |
931 | */ | |
932 | id_counter = id; | |
933 | ||
81505946 | 934 | ctx = nhg_ctx_init(id, nh, grp, vrf_id, afi, type, count); |
e22e8001 SW |
935 | nhg_ctx_set_op(ctx, NHG_CTX_OP_NEW); |
936 | ||
38e40db1 SW |
937 | /* Under statup conditions, we need to handle them immediately |
938 | * like we do for routes. Otherwise, we are going to get a route | |
939 | * with a nhe_id that we have not handled. | |
940 | */ | |
941 | if (startup) | |
942 | return nhg_ctx_process(ctx); | |
943 | ||
e22e8001 SW |
944 | if (queue_add(ctx)) { |
945 | nhg_ctx_process_finish(ctx); | |
946 | return -1; | |
947 | } | |
948 | ||
949 | return 0; | |
950 | } | |
951 | ||
9a1588c4 SW |
952 | /* Kernel-side, received delete message */ |
953 | int zebra_nhg_kernel_del(uint32_t id) | |
954 | { | |
955 | struct nhg_ctx *ctx = NULL; | |
956 | ||
81505946 | 957 | ctx = nhg_ctx_init(id, NULL, NULL, 0, 0, 0, 0); |
9a1588c4 SW |
958 | |
959 | nhg_ctx_set_op(ctx, NHG_CTX_OP_DEL); | |
960 | ||
961 | if (queue_add(ctx)) { | |
962 | nhg_ctx_process_finish(ctx); | |
963 | return -1; | |
964 | } | |
965 | ||
966 | return 0; | |
967 | } | |
968 | ||
5657e7e9 | 969 | /* Some dependency helper functions */ |
98cda54a SW |
970 | static struct nhg_hash_entry *depends_find(struct nexthop *nh, afi_t afi) |
971 | { | |
8a507796 | 972 | struct nexthop *lookup = NULL; |
4505578b | 973 | struct nhg_hash_entry *nhe = NULL; |
98cda54a | 974 | |
8a507796 SW |
975 | copy_nexthops(&lookup, nh, NULL); |
976 | ||
98cda54a | 977 | /* Clear it, in case its a group */ |
8a507796 SW |
978 | nexthops_free(lookup->next); |
979 | nexthops_free(lookup->prev); | |
980 | lookup->next = NULL; | |
981 | lookup->prev = NULL; | |
982 | ||
6384cbcb | 983 | nhe = zebra_nhg_find_nexthop(0, lookup, afi, 0); |
8a507796 SW |
984 | |
985 | nexthops_free(lookup); | |
4505578b SW |
986 | |
987 | return nhe; | |
98cda54a SW |
988 | } |
989 | ||
37c6708b | 990 | static void depends_add(struct nhg_connected_tree_head *head, |
5657e7e9 SW |
991 | struct nhg_hash_entry *depend) |
992 | { | |
37c6708b | 993 | nhg_connected_tree_add_nhe(head, depend); |
5657e7e9 SW |
994 | zebra_nhg_increment_ref(depend); |
995 | } | |
996 | ||
38e40db1 SW |
997 | static struct nhg_hash_entry * |
998 | depends_find_add(struct nhg_connected_tree_head *head, struct nexthop *nh, | |
999 | afi_t afi) | |
5657e7e9 SW |
1000 | { |
1001 | struct nhg_hash_entry *depend = NULL; | |
1002 | ||
1003 | depend = depends_find(nh, afi); | |
1b366e63 SW |
1004 | |
1005 | if (depend) | |
1006 | depends_add(head, depend); | |
38e40db1 SW |
1007 | |
1008 | return depend; | |
1009 | } | |
1010 | ||
1011 | static struct nhg_hash_entry * | |
1012 | depends_find_id_add(struct nhg_connected_tree_head *head, uint32_t id) | |
1013 | { | |
1014 | struct nhg_hash_entry *depend = NULL; | |
1015 | ||
1016 | depend = zebra_nhg_lookup_id(id); | |
1b366e63 SW |
1017 | |
1018 | if (depend) | |
1019 | depends_add(head, depend); | |
38e40db1 SW |
1020 | |
1021 | return depend; | |
5657e7e9 SW |
1022 | } |
1023 | ||
37c6708b | 1024 | static void depends_decrement_free(struct nhg_connected_tree_head *head) |
5657e7e9 | 1025 | { |
37c6708b SW |
1026 | nhg_connected_tree_decrement_ref(head); |
1027 | nhg_connected_tree_free(head); | |
5657e7e9 SW |
1028 | } |
1029 | ||
e22e8001 | 1030 | /* Rib-side, you get a nexthop group struct */ |
7f997721 SW |
1031 | struct nhg_hash_entry * |
1032 | zebra_nhg_rib_find(uint32_t id, struct nexthop_group *nhg, afi_t rt_afi) | |
e22e8001 SW |
1033 | { |
1034 | struct nhg_hash_entry *nhe = NULL; | |
98cda54a | 1035 | |
e9f65162 | 1036 | if (!(nhg && nhg->nexthop)) { |
98cda54a | 1037 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
2d3c57e6 | 1038 | "No nexthop passed to %s", __func__); |
98cda54a SW |
1039 | return NULL; |
1040 | } | |
e22e8001 | 1041 | |
e9f65162 | 1042 | zebra_nhg_find(&nhe, id, nhg, NULL, nhg->nexthop->vrf_id, rt_afi, 0); |
4505578b | 1043 | |
3057df51 SW |
1044 | return nhe; |
1045 | } | |
1046 | ||
b599cd2a SW |
1047 | void zebra_nhg_free_members(struct nhg_hash_entry *nhe) |
1048 | { | |
d3a35138 | 1049 | nexthop_group_delete(&nhe->nhg); |
58396544 | 1050 | /* Decrement to remove connection ref */ |
37c6708b SW |
1051 | nhg_connected_tree_decrement_ref(&nhe->nhg_depends); |
1052 | nhg_connected_tree_free(&nhe->nhg_depends); | |
1053 | nhg_connected_tree_free(&nhe->nhg_dependents); | |
b599cd2a SW |
1054 | } |
1055 | ||
d9f5b2f5 | 1056 | void zebra_nhg_free(void *arg) |
a95b8020 | 1057 | { |
d9f5b2f5 | 1058 | struct nhg_hash_entry *nhe = NULL; |
a95b8020 | 1059 | |
d9f5b2f5 | 1060 | nhe = (struct nhg_hash_entry *)arg; |
a95b8020 | 1061 | |
38e40db1 SW |
1062 | if (nhe->refcnt) |
1063 | zlog_debug("nhe_id=%u hash refcnt=%d", nhe->id, nhe->refcnt); | |
1064 | ||
8e401b25 | 1065 | zebra_nhg_free_members(nhe); |
51d80884 SW |
1066 | |
1067 | XFREE(MTYPE_NHG, nhe); | |
a95b8020 SW |
1068 | } |
1069 | ||
d9f5b2f5 SW |
1070 | void zebra_nhg_decrement_ref(struct nhg_hash_entry *nhe) |
1071 | { | |
e22e8001 SW |
1072 | nhe->refcnt--; |
1073 | ||
32e29e79 | 1074 | if (!zebra_nhg_depends_is_empty(nhe)) |
37c6708b | 1075 | nhg_connected_tree_decrement_ref(&nhe->nhg_depends); |
f54ef6a5 | 1076 | |
38e40db1 | 1077 | if (ZEBRA_NHG_CREATED(nhe) && nhe->refcnt <= 0) |
cb50cbc9 | 1078 | zebra_nhg_uninstall_kernel(nhe); |
7fd392cc SW |
1079 | } |
1080 | ||
7fd392cc SW |
1081 | void zebra_nhg_increment_ref(struct nhg_hash_entry *nhe) |
1082 | { | |
e22e8001 SW |
1083 | nhe->refcnt++; |
1084 | ||
32e29e79 | 1085 | if (!zebra_nhg_depends_is_empty(nhe)) |
37c6708b | 1086 | nhg_connected_tree_increment_ref(&nhe->nhg_depends); |
e22e8001 | 1087 | } |
d9f5b2f5 | 1088 | |
fe593b78 SW |
1089 | void zebra_nhg_set_invalid(struct nhg_hash_entry *nhe) |
1090 | { | |
055a3fa6 SW |
1091 | if (!zebra_nhg_depends_is_empty(nhe) |
1092 | && !CHECK_FLAG(nhe->flags, NEXTHOP_GROUP_RECURSIVE)) { | |
1093 | struct nhg_connected *rb_node_dep = NULL; | |
1094 | ||
1095 | /* If anthing else in the group is valid, the group is valid */ | |
fec211ad | 1096 | frr_each(nhg_connected_tree, &nhe->nhg_dependents, |
37c6708b | 1097 | rb_node_dep) { |
055a3fa6 SW |
1098 | if (CHECK_FLAG(rb_node_dep->nhe->flags, |
1099 | NEXTHOP_GROUP_VALID)) | |
1100 | return; | |
1101 | } | |
1102 | } | |
1103 | ||
e22e8001 SW |
1104 | UNSET_FLAG(nhe->flags, NEXTHOP_GROUP_VALID); |
1105 | /* Assuming uninstalled as well here */ | |
1106 | UNSET_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED); | |
fe593b78 SW |
1107 | |
1108 | if (!zebra_nhg_dependents_is_empty(nhe)) { | |
1109 | struct nhg_connected *rb_node_dep = NULL; | |
1110 | ||
fec211ad | 1111 | frr_each(nhg_connected_tree, &nhe->nhg_dependents, |
37c6708b | 1112 | rb_node_dep) { |
fe593b78 SW |
1113 | zebra_nhg_set_invalid(rb_node_dep->nhe); |
1114 | } | |
1115 | } | |
fe593b78 SW |
1116 | } |
1117 | ||
1118 | void zebra_nhg_set_if(struct nhg_hash_entry *nhe, struct interface *ifp) | |
1119 | { | |
1120 | nhe->ifp = ifp; | |
1121 | if_nhg_dependents_add(ifp, nhe); | |
1122 | } | |
1123 | ||
ad28e79a SW |
1124 | static void nexthop_set_resolved(afi_t afi, const struct nexthop *newhop, |
1125 | struct nexthop *nexthop) | |
1126 | { | |
1127 | struct nexthop *resolved_hop; | |
b43434ad SW |
1128 | uint8_t num_labels = 0; |
1129 | mpls_label_t labels[MPLS_MAX_LABELS]; | |
1130 | enum lsp_types_t label_type = ZEBRA_LSP_NONE; | |
1131 | int i = 0; | |
ad28e79a SW |
1132 | |
1133 | resolved_hop = nexthop_new(); | |
1134 | SET_FLAG(resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
1135 | ||
1136 | resolved_hop->vrf_id = nexthop->vrf_id; | |
1137 | switch (newhop->type) { | |
1138 | case NEXTHOP_TYPE_IPV4: | |
1139 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1140 | /* If the resolving route specifies a gateway, use it */ | |
1141 | resolved_hop->type = newhop->type; | |
1142 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
1143 | ||
1144 | if (newhop->ifindex) { | |
1145 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
1146 | resolved_hop->ifindex = newhop->ifindex; | |
1147 | } | |
1148 | break; | |
1149 | case NEXTHOP_TYPE_IPV6: | |
1150 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1151 | resolved_hop->type = newhop->type; | |
1152 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
1153 | ||
1154 | if (newhop->ifindex) { | |
1155 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
1156 | resolved_hop->ifindex = newhop->ifindex; | |
1157 | } | |
1158 | break; | |
1159 | case NEXTHOP_TYPE_IFINDEX: | |
1160 | /* If the resolving route is an interface route, | |
1161 | * it means the gateway we are looking up is connected | |
1162 | * to that interface. (The actual network is _not_ onlink). | |
1163 | * Therefore, the resolved route should have the original | |
1164 | * gateway as nexthop as it is directly connected. | |
1165 | * | |
1166 | * On Linux, we have to set the onlink netlink flag because | |
1167 | * otherwise, the kernel won't accept the route. | |
1168 | */ | |
1169 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
1170 | if (afi == AFI_IP) { | |
1171 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
1172 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
1173 | } else if (afi == AFI_IP6) { | |
1174 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
1175 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
1176 | } | |
1177 | resolved_hop->ifindex = newhop->ifindex; | |
1178 | break; | |
1179 | case NEXTHOP_TYPE_BLACKHOLE: | |
1180 | resolved_hop->type = NEXTHOP_TYPE_BLACKHOLE; | |
2dc359a6 | 1181 | resolved_hop->bh_type = newhop->bh_type; |
ad28e79a SW |
1182 | break; |
1183 | } | |
1184 | ||
1185 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) | |
1186 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
1187 | ||
b43434ad SW |
1188 | /* Copy labels of the resolved route and the parent resolving to it */ |
1189 | if (newhop->nh_label) { | |
1190 | for (i = 0; i < newhop->nh_label->num_labels; i++) | |
1191 | labels[num_labels++] = newhop->nh_label->label[i]; | |
1192 | label_type = newhop->nh_label_type; | |
1193 | } | |
1194 | ||
1195 | if (nexthop->nh_label) { | |
1196 | for (i = 0; i < nexthop->nh_label->num_labels; i++) | |
1197 | labels[num_labels++] = nexthop->nh_label->label[i]; | |
1198 | ||
1199 | /* If the parent has labels, use its type */ | |
1200 | label_type = nexthop->nh_label_type; | |
1201 | } | |
1202 | ||
1203 | if (num_labels) | |
1204 | nexthop_add_labels(resolved_hop, label_type, num_labels, | |
1205 | labels); | |
ad28e79a SW |
1206 | |
1207 | resolved_hop->rparent = nexthop; | |
50d89650 | 1208 | _nexthop_add(&nexthop->resolved, resolved_hop); |
ad28e79a SW |
1209 | } |
1210 | ||
6913cb1b SW |
1211 | /* Checks if nexthop we are trying to resolve to is valid */ |
1212 | static bool nexthop_valid_resolve(const struct nexthop *nexthop, | |
1213 | const struct nexthop *resolved) | |
1214 | { | |
1215 | /* Can't resolve to a recursive nexthop */ | |
1216 | if (CHECK_FLAG(resolved->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1217 | return false; | |
1218 | ||
1219 | switch (nexthop->type) { | |
1220 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1221 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1222 | /* If the nexthop we are resolving to does not match the | |
1223 | * ifindex for the nexthop the route wanted, its not valid. | |
1224 | */ | |
1225 | if (nexthop->ifindex != resolved->ifindex) | |
1226 | return false; | |
1227 | break; | |
1228 | case NEXTHOP_TYPE_IPV4: | |
1229 | case NEXTHOP_TYPE_IPV6: | |
1230 | case NEXTHOP_TYPE_IFINDEX: | |
1231 | case NEXTHOP_TYPE_BLACKHOLE: | |
1232 | break; | |
1233 | } | |
1234 | ||
1235 | return true; | |
1236 | } | |
1237 | ||
ad28e79a SW |
1238 | /* |
1239 | * Given a nexthop we need to properly recursively resolve | |
1240 | * the route. As such, do a table lookup to find and match | |
98cda54a SW |
1241 | * if at all possible. Set the nexthop->ifindex and resolved_id |
1242 | * as appropriate | |
ad28e79a SW |
1243 | */ |
1244 | static int nexthop_active(afi_t afi, struct route_entry *re, | |
8a507796 | 1245 | struct nexthop *nexthop, struct route_node *top) |
ad28e79a SW |
1246 | { |
1247 | struct prefix p; | |
1248 | struct route_table *table; | |
1249 | struct route_node *rn; | |
1250 | struct route_entry *match = NULL; | |
1251 | int resolved; | |
1252 | struct nexthop *newhop; | |
1253 | struct interface *ifp; | |
1254 | rib_dest_t *dest; | |
5a0bdc78 | 1255 | struct zebra_vrf *zvrf; |
ad28e79a SW |
1256 | |
1257 | if ((nexthop->type == NEXTHOP_TYPE_IPV4) | |
1258 | || nexthop->type == NEXTHOP_TYPE_IPV6) | |
1259 | nexthop->ifindex = 0; | |
1260 | ||
8a507796 | 1261 | |
ad28e79a SW |
1262 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE); |
1263 | nexthops_free(nexthop->resolved); | |
1264 | nexthop->resolved = NULL; | |
1265 | re->nexthop_mtu = 0; | |
1266 | ||
1267 | /* | |
a8c427ee | 1268 | * If the kernel has sent us a NEW route, then |
ad28e79a | 1269 | * by golly gee whiz it's a good route. |
a8c427ee SW |
1270 | * |
1271 | * If its an already INSTALLED route we have already handled, then the | |
1272 | * kernel route's nexthop might have became unreachable | |
1273 | * and we have to handle that. | |
ad28e79a | 1274 | */ |
a8c427ee SW |
1275 | if (!CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED) |
1276 | && (re->type == ZEBRA_ROUTE_KERNEL | |
1277 | || re->type == ZEBRA_ROUTE_SYSTEM)) | |
ad28e79a SW |
1278 | return 1; |
1279 | ||
1280 | /* | |
1281 | * Check to see if we should trust the passed in information | |
1282 | * for UNNUMBERED interfaces as that we won't find the GW | |
1283 | * address in the routing table. | |
1284 | * This check should suffice to handle IPv4 or IPv6 routes | |
1285 | * sourced from EVPN routes which are installed with the | |
1286 | * next hop as the remote VTEP IP. | |
1287 | */ | |
1288 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) { | |
1289 | ifp = if_lookup_by_index(nexthop->ifindex, nexthop->vrf_id); | |
1290 | if (!ifp) { | |
1291 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
1292 | zlog_debug( | |
1293 | "\t%s: Onlink and interface: %u[%u] does not exist", | |
1294 | __PRETTY_FUNCTION__, nexthop->ifindex, | |
1295 | nexthop->vrf_id); | |
1296 | return 0; | |
1297 | } | |
1298 | if (connected_is_unnumbered(ifp)) { | |
1299 | if (if_is_operative(ifp)) | |
1300 | return 1; | |
2d3c57e6 SW |
1301 | |
1302 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
1303 | zlog_debug( | |
1304 | "\t%s: Onlink and interface %s is not operative", | |
1305 | __PRETTY_FUNCTION__, ifp->name); | |
1306 | return 0; | |
ad28e79a SW |
1307 | } |
1308 | if (!if_is_operative(ifp)) { | |
1309 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
1310 | zlog_debug( | |
1311 | "\t%s: Interface %s is not unnumbered", | |
1312 | __PRETTY_FUNCTION__, ifp->name); | |
1313 | return 0; | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | /* Make lookup prefix. */ | |
1318 | memset(&p, 0, sizeof(struct prefix)); | |
1319 | switch (afi) { | |
1320 | case AFI_IP: | |
1321 | p.family = AF_INET; | |
1322 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
1323 | p.u.prefix4 = nexthop->gate.ipv4; | |
1324 | break; | |
1325 | case AFI_IP6: | |
1326 | p.family = AF_INET6; | |
1327 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
1328 | p.u.prefix6 = nexthop->gate.ipv6; | |
1329 | break; | |
1330 | default: | |
1331 | assert(afi != AFI_IP && afi != AFI_IP6); | |
1332 | break; | |
1333 | } | |
1334 | /* Lookup table. */ | |
1335 | table = zebra_vrf_table(afi, SAFI_UNICAST, nexthop->vrf_id); | |
5a0bdc78 PG |
1336 | /* get zvrf */ |
1337 | zvrf = zebra_vrf_lookup_by_id(nexthop->vrf_id); | |
1338 | if (!table || !zvrf) { | |
ad28e79a SW |
1339 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1340 | zlog_debug("\t%s: Table not found", | |
1341 | __PRETTY_FUNCTION__); | |
1342 | return 0; | |
1343 | } | |
1344 | ||
1345 | rn = route_node_match(table, (struct prefix *)&p); | |
1346 | while (rn) { | |
1347 | route_unlock_node(rn); | |
1348 | ||
1349 | /* Lookup should halt if we've matched against ourselves ('top', | |
1350 | * if specified) - i.e., we cannot have a nexthop NH1 is | |
1351 | * resolved by a route NH1. The exception is if the route is a | |
1352 | * host route. | |
1353 | */ | |
1354 | if (top && rn == top) | |
1355 | if (((afi == AFI_IP) && (rn->p.prefixlen != 32)) | |
1356 | || ((afi == AFI_IP6) && (rn->p.prefixlen != 128))) { | |
1357 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
1358 | zlog_debug( | |
1359 | "\t%s: Matched against ourself and prefix length is not max bit length", | |
1360 | __PRETTY_FUNCTION__); | |
1361 | return 0; | |
1362 | } | |
1363 | ||
1364 | /* Pick up selected route. */ | |
1365 | /* However, do not resolve over default route unless explicitly | |
2d3c57e6 SW |
1366 | * allowed. |
1367 | */ | |
ad28e79a | 1368 | if (is_default_prefix(&rn->p) |
5a0bdc78 | 1369 | && !rnh_resolve_via_default(zvrf, p.family)) { |
ad28e79a SW |
1370 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1371 | zlog_debug( | |
1372 | "\t:%s: Resolved against default route", | |
1373 | __PRETTY_FUNCTION__); | |
1374 | return 0; | |
1375 | } | |
1376 | ||
1377 | dest = rib_dest_from_rnode(rn); | |
1378 | if (dest && dest->selected_fib | |
1379 | && !CHECK_FLAG(dest->selected_fib->status, | |
1380 | ROUTE_ENTRY_REMOVED) | |
1381 | && dest->selected_fib->type != ZEBRA_ROUTE_TABLE) | |
1382 | match = dest->selected_fib; | |
1383 | ||
1384 | /* If there is no selected route or matched route is EGP, go up | |
2d3c57e6 SW |
1385 | * tree. |
1386 | */ | |
ad28e79a SW |
1387 | if (!match) { |
1388 | do { | |
1389 | rn = rn->parent; | |
1390 | } while (rn && rn->info == NULL); | |
1391 | if (rn) | |
1392 | route_lock_node(rn); | |
1393 | ||
1394 | continue; | |
1395 | } | |
1396 | ||
1397 | if (match->type == ZEBRA_ROUTE_CONNECT) { | |
1398 | /* Directly point connected route. */ | |
6b468511 | 1399 | newhop = match->ng->nexthop; |
ad28e79a SW |
1400 | if (newhop) { |
1401 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1402 | || nexthop->type == NEXTHOP_TYPE_IPV6) | |
1403 | nexthop->ifindex = newhop->ifindex; | |
1404 | } | |
1405 | return 1; | |
1406 | } else if (CHECK_FLAG(re->flags, ZEBRA_FLAG_ALLOW_RECURSION)) { | |
1407 | resolved = 0; | |
6b468511 | 1408 | for (ALL_NEXTHOPS_PTR(match->ng, newhop)) { |
ad28e79a SW |
1409 | if (!CHECK_FLAG(match->status, |
1410 | ROUTE_ENTRY_INSTALLED)) | |
1411 | continue; | |
6913cb1b | 1412 | if (!nexthop_valid_resolve(nexthop, newhop)) |
ad28e79a SW |
1413 | continue; |
1414 | ||
1415 | SET_FLAG(nexthop->flags, | |
1416 | NEXTHOP_FLAG_RECURSIVE); | |
ad28e79a SW |
1417 | nexthop_set_resolved(afi, newhop, nexthop); |
1418 | resolved = 1; | |
1419 | } | |
8a507796 | 1420 | if (resolved) |
ad28e79a | 1421 | re->nexthop_mtu = match->mtu; |
8a507796 | 1422 | |
ad28e79a SW |
1423 | if (!resolved && IS_ZEBRA_DEBUG_RIB_DETAILED) |
1424 | zlog_debug("\t%s: Recursion failed to find", | |
1425 | __PRETTY_FUNCTION__); | |
1426 | return resolved; | |
1427 | } else if (re->type == ZEBRA_ROUTE_STATIC) { | |
1428 | resolved = 0; | |
6b468511 | 1429 | for (ALL_NEXTHOPS_PTR(match->ng, newhop)) { |
ad28e79a SW |
1430 | if (!CHECK_FLAG(match->status, |
1431 | ROUTE_ENTRY_INSTALLED)) | |
1432 | continue; | |
6913cb1b | 1433 | if (!nexthop_valid_resolve(nexthop, newhop)) |
ad28e79a SW |
1434 | continue; |
1435 | ||
1436 | SET_FLAG(nexthop->flags, | |
1437 | NEXTHOP_FLAG_RECURSIVE); | |
1438 | nexthop_set_resolved(afi, newhop, nexthop); | |
1439 | resolved = 1; | |
1440 | } | |
8a507796 | 1441 | if (resolved) |
ad28e79a | 1442 | re->nexthop_mtu = match->mtu; |
8a507796 | 1443 | |
ad28e79a SW |
1444 | if (!resolved && IS_ZEBRA_DEBUG_RIB_DETAILED) |
1445 | zlog_debug( | |
1446 | "\t%s: Static route unable to resolve", | |
1447 | __PRETTY_FUNCTION__); | |
1448 | return resolved; | |
1449 | } else { | |
1450 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { | |
1451 | zlog_debug( | |
1452 | "\t%s: Route Type %s has not turned on recursion", | |
1453 | __PRETTY_FUNCTION__, | |
1454 | zebra_route_string(re->type)); | |
1455 | if (re->type == ZEBRA_ROUTE_BGP | |
1456 | && !CHECK_FLAG(re->flags, ZEBRA_FLAG_IBGP)) | |
1457 | zlog_debug( | |
1458 | "\tEBGP: see \"disable-ebgp-connected-route-check\" or \"disable-connected-check\""); | |
1459 | } | |
1460 | return 0; | |
1461 | } | |
1462 | } | |
1463 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
1464 | zlog_debug("\t%s: Nexthop did not lookup in table", | |
1465 | __PRETTY_FUNCTION__); | |
1466 | return 0; | |
1467 | } | |
1468 | ||
1469 | /* This function verifies reachability of one given nexthop, which can be | |
1470 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
1471 | * in nexthop->flags field. The nexthop->ifindex will be updated | |
1472 | * appropriately as well. An existing route map can turn | |
1473 | * (otherwise active) nexthop into inactive, but not vice versa. | |
1474 | * | |
98cda54a SW |
1475 | * If it finds a nexthop recursivedly, set the resolved_id |
1476 | * to match that nexthop's nhg_hash_entry ID; | |
1477 | * | |
ad28e79a SW |
1478 | * The return value is the final value of 'ACTIVE' flag. |
1479 | */ | |
1480 | static unsigned nexthop_active_check(struct route_node *rn, | |
1481 | struct route_entry *re, | |
8a507796 | 1482 | struct nexthop *nexthop) |
ad28e79a SW |
1483 | { |
1484 | struct interface *ifp; | |
b68885f9 | 1485 | route_map_result_t ret = RMAP_PERMITMATCH; |
ad28e79a SW |
1486 | int family; |
1487 | char buf[SRCDEST2STR_BUFFER]; | |
1488 | const struct prefix *p, *src_p; | |
1489 | struct zebra_vrf *zvrf; | |
1490 | ||
1491 | srcdest_rnode_prefixes(rn, &p, &src_p); | |
1492 | ||
1493 | if (rn->p.family == AF_INET) | |
1494 | family = AFI_IP; | |
1495 | else if (rn->p.family == AF_INET6) | |
1496 | family = AFI_IP6; | |
1497 | else | |
1498 | family = 0; | |
1499 | switch (nexthop->type) { | |
1500 | case NEXTHOP_TYPE_IFINDEX: | |
1501 | ifp = if_lookup_by_index(nexthop->ifindex, nexthop->vrf_id); | |
1502 | if (ifp && if_is_operative(ifp)) | |
1503 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1504 | else | |
1505 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1506 | break; | |
1507 | case NEXTHOP_TYPE_IPV4: | |
1508 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1509 | family = AFI_IP; | |
8a507796 | 1510 | if (nexthop_active(AFI_IP, re, nexthop, rn)) |
ad28e79a SW |
1511 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1512 | else | |
1513 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1514 | break; | |
1515 | case NEXTHOP_TYPE_IPV6: | |
1516 | family = AFI_IP6; | |
8a507796 | 1517 | if (nexthop_active(AFI_IP6, re, nexthop, rn)) |
ad28e79a SW |
1518 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1519 | else | |
1520 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1521 | break; | |
1522 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1523 | /* RFC 5549, v4 prefix with v6 NH */ | |
1524 | if (rn->p.family != AF_INET) | |
1525 | family = AFI_IP6; | |
1526 | if (IN6_IS_ADDR_LINKLOCAL(&nexthop->gate.ipv6)) { | |
1527 | ifp = if_lookup_by_index(nexthop->ifindex, | |
1528 | nexthop->vrf_id); | |
1529 | if (ifp && if_is_operative(ifp)) | |
1530 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1531 | else | |
1532 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1533 | } else { | |
8a507796 | 1534 | if (nexthop_active(AFI_IP6, re, nexthop, rn)) |
ad28e79a SW |
1535 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1536 | else | |
1537 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1538 | } | |
1539 | break; | |
1540 | case NEXTHOP_TYPE_BLACKHOLE: | |
1541 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1542 | break; | |
1543 | default: | |
1544 | break; | |
1545 | } | |
1546 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) { | |
1547 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
1548 | zlog_debug("\t%s: Unable to find a active nexthop", | |
1549 | __PRETTY_FUNCTION__); | |
1550 | return 0; | |
1551 | } | |
1552 | ||
1553 | /* XXX: What exactly do those checks do? Do we support | |
1554 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? | |
1555 | */ | |
1556 | if (RIB_SYSTEM_ROUTE(re) || (family == AFI_IP && p->family != AF_INET) | |
1557 | || (family == AFI_IP6 && p->family != AF_INET6)) | |
1558 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1559 | ||
1560 | /* The original code didn't determine the family correctly | |
1561 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
1562 | * from the rib_table_info in those cases. | |
1563 | * Possibly it may be better to use only the rib_table_info | |
1564 | * in every case. | |
1565 | */ | |
1566 | if (!family) { | |
1567 | rib_table_info_t *info; | |
1568 | ||
1569 | info = srcdest_rnode_table_info(rn); | |
1570 | family = info->afi; | |
1571 | } | |
1572 | ||
1573 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); | |
1574 | ||
1575 | zvrf = zebra_vrf_lookup_by_id(nexthop->vrf_id); | |
1576 | if (!zvrf) { | |
1577 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
1578 | zlog_debug("\t%s: zvrf is NULL", __PRETTY_FUNCTION__); | |
1579 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1580 | } | |
1581 | ||
1582 | /* It'll get set if required inside */ | |
1583 | ret = zebra_route_map_check(family, re->type, re->instance, p, nexthop, | |
1584 | zvrf, re->tag); | |
1585 | if (ret == RMAP_DENYMATCH) { | |
1586 | if (IS_ZEBRA_DEBUG_RIB) { | |
1587 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1588 | zlog_debug( | |
1589 | "%u:%s: Filtering out with NH out %s due to route map", | |
1590 | re->vrf_id, buf, | |
1591 | ifindex2ifname(nexthop->ifindex, | |
1592 | nexthop->vrf_id)); | |
1593 | } | |
1594 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1595 | } | |
1596 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1597 | } | |
1598 | ||
1599 | /* | |
1600 | * Iterate over all nexthops of the given RIB entry and refresh their | |
9a0d4dd3 DS |
1601 | * ACTIVE flag. If any nexthop is found to toggle the ACTIVE flag, |
1602 | * the whole re structure is flagged with ROUTE_ENTRY_CHANGED. | |
ad28e79a SW |
1603 | * |
1604 | * Return value is the new number of active nexthops. | |
1605 | */ | |
1606 | int nexthop_active_update(struct route_node *rn, struct route_entry *re) | |
1607 | { | |
98cda54a | 1608 | struct nexthop_group new_grp = {}; |
ad28e79a SW |
1609 | struct nexthop *nexthop; |
1610 | union g_addr prev_src; | |
1611 | unsigned int prev_active, new_active; | |
1612 | ifindex_t prev_index; | |
9a0d4dd3 | 1613 | uint8_t curr_active = 0; |
e22e8001 | 1614 | |
98cda54a | 1615 | afi_t rt_afi = family2afi(rn->p.family); |
e22e8001 | 1616 | |
98cda54a | 1617 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); |
e22e8001 | 1618 | |
98cda54a SW |
1619 | /* Copy over the nexthops in current state */ |
1620 | nexthop_group_copy(&new_grp, re->ng); | |
ad28e79a | 1621 | |
98cda54a | 1622 | for (nexthop = new_grp.nexthop; nexthop; nexthop = nexthop->next) { |
ad28e79a | 1623 | |
ad28e79a SW |
1624 | /* No protocol daemon provides src and so we're skipping |
1625 | * tracking it */ | |
1626 | prev_src = nexthop->rmap_src; | |
1627 | prev_active = CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
1628 | prev_index = nexthop->ifindex; | |
1629 | /* | |
1630 | * We need to respect the multipath_num here | |
1631 | * as that what we should be able to install from | |
1632 | * a multipath perpsective should not be a data plane | |
1633 | * decision point. | |
1634 | */ | |
98cda54a | 1635 | new_active = |
8a507796 | 1636 | nexthop_active_check(rn, re, nexthop); |
98cda54a | 1637 | |
ad28e79a | 1638 | if (new_active |
98cda54a | 1639 | && nexthop_group_active_nexthop_num(&new_grp) |
9a0d4dd3 | 1640 | >= zrouter.multipath_num) { |
ad28e79a SW |
1641 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
1642 | new_active = 0; | |
1643 | } | |
9a0d4dd3 | 1644 | |
df31a989 | 1645 | if (new_active) |
9a0d4dd3 DS |
1646 | curr_active++; |
1647 | ||
ad28e79a SW |
1648 | /* Don't allow src setting on IPv6 addr for now */ |
1649 | if (prev_active != new_active || prev_index != nexthop->ifindex | |
1650 | || ((nexthop->type >= NEXTHOP_TYPE_IFINDEX | |
1651 | && nexthop->type < NEXTHOP_TYPE_IPV6) | |
1652 | && prev_src.ipv4.s_addr | |
1653 | != nexthop->rmap_src.ipv4.s_addr) | |
1654 | || ((nexthop->type >= NEXTHOP_TYPE_IPV6 | |
1655 | && nexthop->type < NEXTHOP_TYPE_BLACKHOLE) | |
1656 | && !(IPV6_ADDR_SAME(&prev_src.ipv6, | |
1657 | &nexthop->rmap_src.ipv6))) | |
8a507796 | 1658 | || CHECK_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED)) |
ad28e79a | 1659 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); |
ad28e79a SW |
1660 | } |
1661 | ||
8a507796 | 1662 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED)) { |
98cda54a | 1663 | struct nhg_hash_entry *new_nhe = NULL; |
98cda54a | 1664 | |
7f997721 | 1665 | new_nhe = zebra_nhg_rib_find(0, &new_grp, rt_afi); |
98cda54a | 1666 | |
144a1b34 | 1667 | zebra_nhg_re_update_ref(re, new_nhe); |
e22e8001 SW |
1668 | } |
1669 | ||
98cda54a SW |
1670 | if (curr_active) { |
1671 | struct nhg_hash_entry *nhe = NULL; | |
1672 | ||
1673 | nhe = zebra_nhg_lookup_id(re->nhe_id); | |
1674 | ||
8dfbc657 | 1675 | if (nhe) |
98cda54a | 1676 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_VALID); |
8dfbc657 | 1677 | else |
98cda54a SW |
1678 | flog_err( |
1679 | EC_ZEBRA_TABLE_LOOKUP_FAILED, | |
1680 | "Active update on NHE id=%u that we do not have in our tables", | |
1681 | re->nhe_id); | |
1682 | } | |
1683 | ||
1684 | /* | |
1685 | * Do not need these nexthops anymore since they | |
1686 | * were either copied over into an nhe or not | |
1687 | * used at all. | |
1688 | */ | |
1689 | nexthops_free(new_grp.nexthop); | |
9a0d4dd3 | 1690 | return curr_active; |
ad28e79a | 1691 | } |
5be96a2d | 1692 | |
38e40db1 SW |
1693 | static void zebra_nhg_re_attach_ref(struct route_entry *re, |
1694 | struct nhg_hash_entry *new) | |
1695 | { | |
1696 | re->ng = new->nhg; | |
1697 | re->nhe_id = new->id; | |
1698 | ||
1699 | zebra_nhg_increment_ref(new); | |
1700 | } | |
1701 | ||
144a1b34 SW |
1702 | int zebra_nhg_re_update_ref(struct route_entry *re, struct nhg_hash_entry *new) |
1703 | { | |
1704 | struct nhg_hash_entry *old = NULL; | |
139ddad8 | 1705 | int ret = 0; |
144a1b34 | 1706 | |
139ddad8 SW |
1707 | if (new == NULL) { |
1708 | re->ng = NULL; | |
1709 | goto done; | |
1710 | } | |
144a1b34 SW |
1711 | |
1712 | if (re->nhe_id != new->id) { | |
1713 | old = zebra_nhg_lookup_id(re->nhe_id); | |
1714 | ||
38e40db1 | 1715 | zebra_nhg_re_attach_ref(re, new); |
144a1b34 | 1716 | |
144a1b34 SW |
1717 | if (old) |
1718 | zebra_nhg_decrement_ref(old); | |
38e40db1 SW |
1719 | } else if (!re->ng) |
1720 | /* This is the first time it's being attached */ | |
1721 | zebra_nhg_re_attach_ref(re, new); | |
144a1b34 | 1722 | |
139ddad8 SW |
1723 | done: |
1724 | return ret; | |
144a1b34 SW |
1725 | } |
1726 | ||
98cda54a | 1727 | /* Convert a nhe into a group array */ |
8dbc800f SW |
1728 | uint8_t zebra_nhg_nhe2grp(struct nh_grp *grp, struct nhg_hash_entry *nhe, |
1729 | int max_num) | |
98cda54a SW |
1730 | { |
1731 | struct nhg_connected *rb_node_dep = NULL; | |
1732 | struct nhg_hash_entry *depend = NULL; | |
1733 | uint8_t i = 0; | |
1734 | ||
fec211ad | 1735 | frr_each(nhg_connected_tree, &nhe->nhg_depends, rb_node_dep) { |
8dbc800f SW |
1736 | bool duplicate = false; |
1737 | ||
98cda54a SW |
1738 | depend = rb_node_dep->nhe; |
1739 | ||
1740 | /* | |
1741 | * If its recursive, use its resolved nhe in the group | |
1742 | */ | |
1743 | if (CHECK_FLAG(depend->flags, NEXTHOP_GROUP_RECURSIVE)) { | |
1744 | depend = zebra_nhg_resolve(depend); | |
1745 | if (!depend) { | |
1746 | flog_err( | |
1747 | EC_ZEBRA_NHG_FIB_UPDATE, | |
df31a989 SW |
1748 | "Failed to recursively resolve Nexthop Hash Entry in the group id=%u", |
1749 | nhe->id); | |
98cda54a SW |
1750 | continue; |
1751 | } | |
1752 | } | |
1753 | ||
8dbc800f SW |
1754 | /* Check for duplicate IDs, kernel doesn't like that */ |
1755 | for (int j = 0; j < i; j++) { | |
1756 | if (depend->id == grp[j].id) | |
1757 | duplicate = true; | |
1758 | } | |
1759 | ||
1760 | if (!duplicate) { | |
1761 | grp[i].id = depend->id; | |
1762 | /* We aren't using weights for anything right now */ | |
1763 | grp[i].weight = 0; | |
1764 | i++; | |
1765 | } | |
1766 | ||
1767 | if (i >= max_num) | |
1768 | goto done; | |
98cda54a | 1769 | } |
8dbc800f SW |
1770 | |
1771 | done: | |
98cda54a SW |
1772 | return i; |
1773 | } | |
1774 | ||
5be96a2d SW |
1775 | void zebra_nhg_install_kernel(struct nhg_hash_entry *nhe) |
1776 | { | |
f429bd1b SW |
1777 | struct nhg_connected *rb_node_dep = NULL; |
1778 | ||
1779 | /* Resolve it first */ | |
1780 | nhe = zebra_nhg_resolve(nhe); | |
1781 | ||
1782 | /* Make sure all depends are installed/queued */ | |
fec211ad | 1783 | frr_each(nhg_connected_tree, &nhe->nhg_depends, rb_node_dep) { |
f429bd1b SW |
1784 | zebra_nhg_install_kernel(rb_node_dep->nhe); |
1785 | } | |
1786 | ||
e22e8001 SW |
1787 | if (!CHECK_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED) |
1788 | && !CHECK_FLAG(nhe->flags, NEXTHOP_GROUP_QUEUED)) { | |
147bad16 | 1789 | int ret = dplane_nexthop_add(nhe); |
2d3c57e6 | 1790 | |
147bad16 SW |
1791 | switch (ret) { |
1792 | case ZEBRA_DPLANE_REQUEST_QUEUED: | |
1793 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_QUEUED); | |
1794 | break; | |
1795 | case ZEBRA_DPLANE_REQUEST_FAILURE: | |
1796 | flog_err( | |
1797 | EC_ZEBRA_DP_INSTALL_FAIL, | |
1798 | "Failed to install Nexthop ID (%u) into the kernel", | |
1799 | nhe->id); | |
1800 | break; | |
1801 | case ZEBRA_DPLANE_REQUEST_SUCCESS: | |
1802 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED); | |
1803 | break; | |
1804 | } | |
1805 | } | |
1806 | } | |
1807 | ||
147bad16 SW |
1808 | void zebra_nhg_uninstall_kernel(struct nhg_hash_entry *nhe) |
1809 | { | |
38e40db1 SW |
1810 | /* Release from the non-ID hash'd table so nothing tries to use it */ |
1811 | zebra_nhg_release_no_id(nhe); | |
1812 | ||
147bad16 SW |
1813 | if (CHECK_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED)) { |
1814 | int ret = dplane_nexthop_delete(nhe); | |
2d3c57e6 | 1815 | |
9a1588c4 SW |
1816 | /* Change its type to us since we are installing it */ |
1817 | nhe->type = ZEBRA_ROUTE_NHG; | |
147bad16 SW |
1818 | switch (ret) { |
1819 | case ZEBRA_DPLANE_REQUEST_QUEUED: | |
1820 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_QUEUED); | |
1821 | break; | |
1822 | case ZEBRA_DPLANE_REQUEST_FAILURE: | |
1823 | flog_err( | |
1824 | EC_ZEBRA_DP_DELETE_FAIL, | |
1825 | "Failed to uninstall Nexthop ID (%u) from the kernel", | |
1826 | nhe->id); | |
1827 | break; | |
1828 | case ZEBRA_DPLANE_REQUEST_SUCCESS: | |
1829 | UNSET_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED); | |
38e40db1 | 1830 | zebra_nhg_handle_uninstall(nhe); |
147bad16 SW |
1831 | break; |
1832 | } | |
e22e8001 | 1833 | } else |
38e40db1 | 1834 | zebra_nhg_handle_uninstall(nhe); |
147bad16 SW |
1835 | } |
1836 | ||
5f3c9e52 SW |
1837 | void zebra_nhg_dplane_result(struct zebra_dplane_ctx *ctx) |
1838 | { | |
1839 | enum dplane_op_e op; | |
1840 | enum zebra_dplane_result status; | |
1841 | uint32_t id = 0; | |
1842 | struct nhg_hash_entry *nhe = NULL; | |
1843 | ||
1844 | op = dplane_ctx_get_op(ctx); | |
1845 | status = dplane_ctx_get_status(ctx); | |
1846 | ||
0c8215cb | 1847 | id = dplane_ctx_get_nhe_id(ctx); |
e22e8001 | 1848 | |
5f3c9e52 SW |
1849 | nhe = zebra_nhg_lookup_id(id); |
1850 | ||
1851 | if (nhe) { | |
7512f617 | 1852 | UNSET_FLAG(nhe->flags, NEXTHOP_GROUP_QUEUED); |
5f3c9e52 SW |
1853 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) |
1854 | zlog_debug( | |
1855 | "Nexthop dplane ctx %p, op %s, nexthop ID (%u), result %s", | |
1856 | ctx, dplane_op2str(op), nhe->id, | |
1857 | dplane_res2str(status)); | |
1858 | ||
1859 | switch (op) { | |
1860 | case DPLANE_OP_NH_DELETE: | |
1861 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
1862 | UNSET_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED); | |
38e40db1 | 1863 | zebra_nhg_handle_uninstall(nhe); |
5f3c9e52 SW |
1864 | } else { |
1865 | flog_err( | |
1866 | EC_ZEBRA_DP_DELETE_FAIL, | |
1867 | "Failed to uninstall Nexthop ID (%u) from the kernel", | |
1868 | nhe->id); | |
1869 | } | |
1870 | break; | |
1871 | case DPLANE_OP_NH_INSTALL: | |
1872 | case DPLANE_OP_NH_UPDATE: | |
1873 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
32e757f4 | 1874 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_VALID); |
5f3c9e52 SW |
1875 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED); |
1876 | } else { | |
1877 | flog_err( | |
1878 | EC_ZEBRA_DP_INSTALL_FAIL, | |
1879 | "Failed to install Nexthop ID (%u) into the kernel", | |
1880 | nhe->id); | |
1881 | UNSET_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED); | |
1882 | } | |
5f3c9e52 SW |
1883 | break; |
1884 | case DPLANE_OP_ROUTE_INSTALL: | |
1885 | case DPLANE_OP_ROUTE_UPDATE: | |
1886 | case DPLANE_OP_ROUTE_DELETE: | |
1887 | case DPLANE_OP_ROUTE_NOTIFY: | |
1888 | case DPLANE_OP_LSP_INSTALL: | |
1889 | case DPLANE_OP_LSP_UPDATE: | |
1890 | case DPLANE_OP_LSP_DELETE: | |
1891 | case DPLANE_OP_LSP_NOTIFY: | |
1892 | case DPLANE_OP_PW_INSTALL: | |
1893 | case DPLANE_OP_PW_UNINSTALL: | |
1894 | case DPLANE_OP_SYS_ROUTE_ADD: | |
1895 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
1896 | case DPLANE_OP_ADDR_INSTALL: | |
1897 | case DPLANE_OP_ADDR_UNINSTALL: | |
1898 | case DPLANE_OP_MAC_INSTALL: | |
1899 | case DPLANE_OP_MAC_DELETE: | |
40a2a6cd SW |
1900 | case DPLANE_OP_NEIGH_INSTALL: |
1901 | case DPLANE_OP_NEIGH_UPDATE: | |
1902 | case DPLANE_OP_NEIGH_DELETE: | |
1903 | case DPLANE_OP_VTEP_ADD: | |
1904 | case DPLANE_OP_VTEP_DELETE: | |
5f3c9e52 SW |
1905 | case DPLANE_OP_NONE: |
1906 | break; | |
1907 | } | |
71593b3f | 1908 | } else |
5f3c9e52 SW |
1909 | flog_err( |
1910 | EC_ZEBRA_NHG_SYNC, | |
1911 | "%s operation preformed on Nexthop ID (%u) in the kernel, that we no longer have in our table", | |
1912 | dplane_op2str(op), id); | |
71593b3f SW |
1913 | |
1914 | dplane_ctx_fini(&ctx); | |
5be96a2d SW |
1915 | } |
1916 | ||
38e40db1 SW |
1917 | static void zebra_nhg_sweep_entry(struct hash_bucket *bucket, void *arg) |
1918 | { | |
1919 | struct nhg_hash_entry *nhe = NULL; | |
1920 | ||
1921 | nhe = (struct nhg_hash_entry *)bucket->data; | |
1922 | ||
1923 | /* If its being ref'd, just let it be uninstalled via a route removal */ | |
1924 | if (ZEBRA_NHG_CREATED(nhe) && nhe->refcnt <= 0) | |
1925 | zebra_nhg_uninstall_kernel(nhe); | |
1926 | } | |
1927 | ||
1928 | void zebra_nhg_sweep_table(struct hash *hash) | |
1929 | { | |
1930 | hash_iterate(hash, zebra_nhg_sweep_entry, NULL); | |
1931 | } |