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7758e3f3 | 1 | /* Zebra MPLS code |
2 | * Copyright (C) 2013 Cumulus Networks, Inc. | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
7758e3f3 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "prefix.h" | |
24 | #include "table.h" | |
25 | #include "memory.h" | |
7758e3f3 | 26 | #include "command.h" |
27 | #include "if.h" | |
28 | #include "log.h" | |
29 | #include "sockunion.h" | |
30 | #include "linklist.h" | |
31 | #include "thread.h" | |
32 | #include "workqueue.h" | |
33 | #include "prefix.h" | |
34 | #include "routemap.h" | |
35 | #include "stream.h" | |
36 | #include "nexthop.h" | |
a971aeb6 | 37 | #include "termtable.h" |
b78b820d | 38 | #include "lib/json.h" |
7758e3f3 | 39 | |
40 | #include "zebra/rib.h" | |
41 | #include "zebra/rt.h" | |
86f07f44 | 42 | #include "zebra/interface.h" |
7758e3f3 | 43 | #include "zebra/zserv.h" |
3801e764 | 44 | #include "zebra/zebra_router.h" |
7758e3f3 | 45 | #include "zebra/redistribute.h" |
46 | #include "zebra/debug.h" | |
7758e3f3 | 47 | #include "zebra/zebra_vrf.h" |
48 | #include "zebra/zebra_mpls.h" | |
31f937fb | 49 | #include "zebra/zebra_srte.h" |
43e52561 | 50 | #include "zebra/zebra_errors.h" |
7758e3f3 | 51 | |
bf8d3d6a DL |
52 | DEFINE_MTYPE_STATIC(ZEBRA, LSP, "MPLS LSP object"); |
53 | DEFINE_MTYPE_STATIC(ZEBRA, FEC, "MPLS FEC object"); | |
54 | DEFINE_MTYPE_STATIC(ZEBRA, NHLFE, "MPLS nexthop object"); | |
7758e3f3 | 55 | |
fe6c7157 | 56 | int mpls_enabled; |
6fb35808 | 57 | bool mpls_pw_reach_strict; /* Strict reachability checking */ |
fe6c7157 | 58 | |
7758e3f3 | 59 | /* static function declarations */ |
f31e084c | 60 | |
d62a17ae | 61 | static void fec_evaluate(struct zebra_vrf *zvrf); |
d7c0a89a | 62 | static uint32_t fec_derive_label_from_index(struct zebra_vrf *vrf, |
60e36561 | 63 | struct zebra_fec *fec); |
d62a17ae | 64 | static int lsp_install(struct zebra_vrf *zvrf, mpls_label_t label, |
65 | struct route_node *rn, struct route_entry *re); | |
66 | static int lsp_uninstall(struct zebra_vrf *zvrf, mpls_label_t label); | |
60e36561 | 67 | static int fec_change_update_lsp(struct zebra_vrf *zvrf, struct zebra_fec *fec, |
d62a17ae | 68 | mpls_label_t old_label); |
60e36561 DS |
69 | static int fec_send(struct zebra_fec *fec, struct zserv *client); |
70 | static void fec_update_clients(struct zebra_fec *fec); | |
71 | static void fec_print(struct zebra_fec *fec, struct vty *vty); | |
72 | static struct zebra_fec *fec_find(struct route_table *table, struct prefix *p); | |
73 | static struct zebra_fec *fec_add(struct route_table *table, struct prefix *p, | |
74 | mpls_label_t label, uint32_t flags, | |
75 | uint32_t label_index); | |
76 | static int fec_del(struct zebra_fec *fec); | |
d62a17ae | 77 | |
d8b87afe | 78 | static unsigned int label_hash(const void *p); |
74df8d6d | 79 | static bool label_cmp(const void *p1, const void *p2); |
f2595bd5 | 80 | static int nhlfe_nexthop_active_ipv4(struct zebra_nhlfe *nhlfe, |
d62a17ae | 81 | struct nexthop *nexthop); |
f2595bd5 | 82 | static int nhlfe_nexthop_active_ipv6(struct zebra_nhlfe *nhlfe, |
d62a17ae | 83 | struct nexthop *nexthop); |
f2595bd5 | 84 | static int nhlfe_nexthop_active(struct zebra_nhlfe *nhlfe); |
d62a17ae | 85 | |
8f74a383 | 86 | static void lsp_select_best_nhlfe(struct zebra_lsp *lsp); |
e3b78da8 TB |
87 | static void lsp_uninstall_from_kernel(struct hash_bucket *bucket, void *ctxt); |
88 | static void lsp_schedule(struct hash_bucket *bucket, void *ctxt); | |
d62a17ae | 89 | static wq_item_status lsp_process(struct work_queue *wq, void *data); |
90 | static void lsp_processq_del(struct work_queue *wq, void *data); | |
91 | static void lsp_processq_complete(struct work_queue *wq); | |
8f74a383 | 92 | static int lsp_processq_add(struct zebra_lsp *lsp); |
d62a17ae | 93 | static void *lsp_alloc(void *p); |
1323491d MS |
94 | |
95 | /* Check whether lsp can be freed - no nhlfes, e.g., and call free api */ | |
8f74a383 | 96 | static void lsp_check_free(struct hash *lsp_table, struct zebra_lsp **plsp); |
1323491d | 97 | |
ebab422a | 98 | /* Free lsp; sets caller's pointer to NULL */ |
8f74a383 | 99 | static void lsp_free(struct hash *lsp_table, struct zebra_lsp **plsp); |
d62a17ae | 100 | |
f2595bd5 DS |
101 | static char *nhlfe2str(const struct zebra_nhlfe *nhlfe, char *buf, int size); |
102 | static char *nhlfe_config_str(const struct zebra_nhlfe *nhlfe, char *buf, | |
103 | int size); | |
104 | static int nhlfe_nhop_match(struct zebra_nhlfe *nhlfe, | |
105 | enum nexthop_types_t gtype, | |
e4a1ec74 | 106 | const union g_addr *gate, ifindex_t ifindex); |
f2595bd5 DS |
107 | static struct zebra_nhlfe *nhlfe_find(struct nhlfe_list_head *list, |
108 | enum lsp_types_t lsp_type, | |
109 | enum nexthop_types_t gtype, | |
110 | const union g_addr *gate, | |
111 | ifindex_t ifindex); | |
112 | static struct zebra_nhlfe * | |
8f74a383 | 113 | nhlfe_add(struct zebra_lsp *lsp, enum lsp_types_t lsp_type, |
f2595bd5 DS |
114 | enum nexthop_types_t gtype, const union g_addr *gate, |
115 | ifindex_t ifindex, uint8_t num_labels, const mpls_label_t *labels, | |
116 | bool is_backup); | |
117 | static int nhlfe_del(struct zebra_nhlfe *nhlfe); | |
118 | static void nhlfe_free(struct zebra_nhlfe *nhlfe); | |
119 | static void nhlfe_out_label_update(struct zebra_nhlfe *nhlfe, | |
8ecdb26e | 120 | struct mpls_label_stack *nh_label); |
8f74a383 | 121 | static int mpls_lsp_uninstall_all(struct hash *lsp_table, struct zebra_lsp *lsp, |
d62a17ae | 122 | enum lsp_types_t type); |
123 | static int mpls_static_lsp_uninstall_all(struct zebra_vrf *zvrf, | |
124 | mpls_label_t in_label); | |
f2595bd5 | 125 | static void nhlfe_print(struct zebra_nhlfe *nhlfe, struct vty *vty, |
3c0e1622 | 126 | const char *indent); |
8f74a383 | 127 | static void lsp_print(struct vty *vty, struct zebra_lsp *lsp); |
651105b5 RW |
128 | static void mpls_lsp_uninstall_all_type(struct hash_bucket *bucket, void *ctxt); |
129 | static void mpls_ftn_uninstall_all(struct zebra_vrf *zvrf, | |
130 | int afi, enum lsp_types_t lsp_type); | |
8f74a383 | 131 | static int lsp_znh_install(struct zebra_lsp *lsp, enum lsp_types_t type, |
f2e7f4eb | 132 | const struct zapi_nexthop *znh); |
8f74a383 | 133 | static int lsp_backup_znh_install(struct zebra_lsp *lsp, enum lsp_types_t type, |
f2e7f4eb | 134 | const struct zapi_nexthop *znh); |
7758e3f3 | 135 | |
7758e3f3 | 136 | /* Static functions */ |
137 | ||
3d468f66 DS |
138 | /* |
139 | * Handle failure in LSP install, clear flags for NHLFE. | |
140 | */ | |
8f74a383 | 141 | static void clear_nhlfe_installed(struct zebra_lsp *lsp) |
3d468f66 | 142 | { |
f2595bd5 | 143 | struct zebra_nhlfe *nhlfe; |
3d468f66 DS |
144 | struct nexthop *nexthop; |
145 | ||
ee70f629 | 146 | frr_each_safe(nhlfe_list, &lsp->nhlfe_list, nhlfe) { |
3d468f66 DS |
147 | nexthop = nhlfe->nexthop; |
148 | if (!nexthop) | |
149 | continue; | |
150 | ||
151 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
152 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
153 | } | |
68110c42 MS |
154 | |
155 | frr_each_safe(nhlfe_list, &lsp->backup_nhlfe_list, nhlfe) { | |
156 | nexthop = nhlfe->nexthop; | |
157 | if (!nexthop) | |
158 | continue; | |
159 | ||
160 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
161 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
162 | } | |
3d468f66 DS |
163 | } |
164 | ||
a64448ba DS |
165 | /* |
166 | * Install label forwarding entry based on labeled-route entry. | |
167 | */ | |
d62a17ae | 168 | static int lsp_install(struct zebra_vrf *zvrf, mpls_label_t label, |
169 | struct route_node *rn, struct route_entry *re) | |
170 | { | |
171 | struct hash *lsp_table; | |
a7d2146a | 172 | struct zebra_ile tmp_ile; |
8f74a383 | 173 | struct zebra_lsp *lsp; |
f2595bd5 | 174 | struct zebra_nhlfe *nhlfe; |
d62a17ae | 175 | struct nexthop *nexthop; |
176 | enum lsp_types_t lsp_type; | |
177 | char buf[BUFSIZ]; | |
178 | int added, changed; | |
179 | ||
180 | /* Lookup table. */ | |
181 | lsp_table = zvrf->lsp_table; | |
182 | if (!lsp_table) | |
183 | return -1; | |
184 | ||
185 | lsp_type = lsp_type_from_re_type(re->type); | |
186 | added = changed = 0; | |
187 | ||
188 | /* Locate or allocate LSP entry. */ | |
189 | tmp_ile.in_label = label; | |
190 | lsp = hash_get(lsp_table, &tmp_ile, lsp_alloc); | |
d62a17ae | 191 | |
192 | /* For each active nexthop, create NHLFE. Note that we deliberately skip | |
193 | * recursive nexthops right now, because intermediate hops won't | |
194 | * understand | |
195 | * the label advertised by the recursive nexthop (plus we don't have the | |
196 | * logic yet to push multiple labels). | |
197 | */ | |
c415d895 | 198 | for (nexthop = re->nhe->nhg.nexthop; |
0eb97b86 | 199 | nexthop; nexthop = nexthop->next) { |
d62a17ae | 200 | /* Skip inactive and recursive entries. */ |
201 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
202 | continue; | |
203 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
204 | continue; | |
205 | ||
ee70f629 MS |
206 | nhlfe = nhlfe_find(&lsp->nhlfe_list, lsp_type, |
207 | nexthop->type, &nexthop->gate, | |
d62a17ae | 208 | nexthop->ifindex); |
209 | if (nhlfe) { | |
210 | /* Clear deleted flag (in case it was set) */ | |
211 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
212 | if (nexthop_labels_match(nhlfe->nexthop, nexthop)) | |
213 | /* No change */ | |
214 | continue; | |
215 | ||
216 | ||
217 | if (IS_ZEBRA_DEBUG_MPLS) { | |
218 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
219 | zlog_debug( | |
3efd0893 | 220 | "LSP in-label %u type %d nexthop %s out-label changed", |
d62a17ae | 221 | lsp->ile.in_label, lsp_type, buf); |
222 | } | |
223 | ||
224 | /* Update out label, trigger processing. */ | |
225 | nhlfe_out_label_update(nhlfe, nexthop->nh_label); | |
226 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
227 | changed++; | |
228 | } else { | |
229 | /* Add LSP entry to this nexthop */ | |
230 | nhlfe = nhlfe_add(lsp, lsp_type, nexthop->type, | |
231 | &nexthop->gate, nexthop->ifindex, | |
5065db0a | 232 | nexthop->nh_label->num_labels, |
cc1b9746 MS |
233 | nexthop->nh_label->label, |
234 | false /*backup*/); | |
d62a17ae | 235 | if (!nhlfe) |
236 | return -1; | |
237 | ||
238 | if (IS_ZEBRA_DEBUG_MPLS) { | |
239 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
240 | zlog_debug( | |
3efd0893 | 241 | "Add LSP in-label %u type %d nexthop %s out-label %u", |
d62a17ae | 242 | lsp->ile.in_label, lsp_type, buf, |
243 | nexthop->nh_label->label[0]); | |
244 | } | |
245 | ||
246 | lsp->addr_family = NHLFE_FAMILY(nhlfe); | |
247 | ||
248 | /* Mark NHLFE as changed. */ | |
249 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
250 | added++; | |
251 | } | |
252 | } | |
253 | ||
254 | /* Queue LSP for processing if necessary. If no NHLFE got added (special | |
255 | * case), delete the LSP entry; this case results in somewhat ugly | |
256 | * logging. | |
257 | */ | |
258 | if (added || changed) { | |
259 | if (lsp_processq_add(lsp)) | |
260 | return -1; | |
1323491d MS |
261 | } else { |
262 | lsp_check_free(lsp_table, &lsp); | |
263 | } | |
d62a17ae | 264 | |
265 | return 0; | |
a64448ba DS |
266 | } |
267 | ||
268 | /* | |
269 | * Uninstall all non-static NHLFEs of a label forwarding entry. If all | |
270 | * NHLFEs are removed, the entire entry is deleted. | |
271 | */ | |
d62a17ae | 272 | static int lsp_uninstall(struct zebra_vrf *zvrf, mpls_label_t label) |
273 | { | |
274 | struct hash *lsp_table; | |
a7d2146a | 275 | struct zebra_ile tmp_ile; |
8f74a383 | 276 | struct zebra_lsp *lsp; |
f2595bd5 | 277 | struct zebra_nhlfe *nhlfe; |
d62a17ae | 278 | char buf[BUFSIZ]; |
279 | ||
280 | /* Lookup table. */ | |
281 | lsp_table = zvrf->lsp_table; | |
282 | if (!lsp_table) | |
283 | return -1; | |
284 | ||
285 | /* If entry is not present, exit. */ | |
286 | tmp_ile.in_label = label; | |
287 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
ee70f629 | 288 | if (!lsp || (nhlfe_list_first(&lsp->nhlfe_list) == NULL)) |
d62a17ae | 289 | return 0; |
290 | ||
291 | /* Mark NHLFEs for delete or directly delete, as appropriate. */ | |
ee70f629 | 292 | frr_each_safe(nhlfe_list, &lsp->nhlfe_list, nhlfe) { |
d62a17ae | 293 | |
294 | /* Skip static NHLFEs */ | |
295 | if (nhlfe->type == ZEBRA_LSP_STATIC) | |
296 | continue; | |
297 | ||
298 | if (IS_ZEBRA_DEBUG_MPLS) { | |
299 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
300 | zlog_debug( | |
301 | "Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
302 | label, nhlfe->type, buf, nhlfe->flags); | |
303 | } | |
304 | ||
305 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED)) { | |
306 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
307 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
308 | } else { | |
309 | nhlfe_del(nhlfe); | |
310 | } | |
311 | } | |
312 | ||
313 | /* Queue LSP for processing, if needed, else delete. */ | |
314 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) { | |
315 | if (lsp_processq_add(lsp)) | |
316 | return -1; | |
1323491d MS |
317 | } else { |
318 | lsp_check_free(lsp_table, &lsp); | |
319 | } | |
d62a17ae | 320 | |
321 | return 0; | |
a64448ba DS |
322 | } |
323 | ||
28d58fd7 VV |
324 | /* |
325 | * This function is invoked upon change to label block configuration; it | |
326 | * will walk all registered FECs with label-index and appropriately update | |
327 | * their local labels and trigger client updates. | |
328 | */ | |
d62a17ae | 329 | static void fec_evaluate(struct zebra_vrf *zvrf) |
330 | { | |
331 | struct route_node *rn; | |
60e36561 | 332 | struct zebra_fec *fec; |
d7c0a89a | 333 | uint32_t old_label, new_label; |
d62a17ae | 334 | int af; |
d62a17ae | 335 | |
336 | for (af = AFI_IP; af < AFI_MAX; af++) { | |
337 | if (zvrf->fec_table[af] == NULL) | |
338 | continue; | |
339 | ||
340 | for (rn = route_top(zvrf->fec_table[af]); rn; | |
341 | rn = route_next(rn)) { | |
342 | if ((fec = rn->info) == NULL) | |
343 | continue; | |
344 | ||
345 | /* Skip configured FECs and those without a label index. | |
346 | */ | |
347 | if (fec->flags & FEC_FLAG_CONFIGURED | |
348 | || fec->label_index == MPLS_INVALID_LABEL_INDEX) | |
349 | continue; | |
350 | ||
d62a17ae | 351 | /* Save old label, determine new label. */ |
352 | old_label = fec->label; | |
353 | new_label = | |
354 | zvrf->mpls_srgb.start_label + fec->label_index; | |
355 | if (new_label >= zvrf->mpls_srgb.end_label) | |
356 | new_label = MPLS_INVALID_LABEL; | |
357 | ||
358 | /* If label has changed, update FEC and clients. */ | |
359 | if (new_label == old_label) | |
360 | continue; | |
361 | ||
362 | if (IS_ZEBRA_DEBUG_MPLS) | |
363 | zlog_debug( | |
b467b4b4 DS |
364 | "Update fec %pRN new label %u upon label block", |
365 | rn, new_label); | |
d62a17ae | 366 | |
367 | fec->label = new_label; | |
368 | fec_update_clients(fec); | |
369 | ||
370 | /* Update label forwarding entries appropriately */ | |
371 | fec_change_update_lsp(zvrf, fec, old_label); | |
372 | } | |
373 | } | |
28d58fd7 VV |
374 | } |
375 | ||
376 | /* | |
377 | * Derive (if possible) and update the local label for the FEC based on | |
378 | * its label index. The index is "acceptable" if it falls within the | |
379 | * globally configured label block (SRGB). | |
380 | */ | |
d7c0a89a | 381 | static uint32_t fec_derive_label_from_index(struct zebra_vrf *zvrf, |
60e36561 | 382 | struct zebra_fec *fec) |
28d58fd7 | 383 | { |
d7c0a89a | 384 | uint32_t label; |
28d58fd7 | 385 | |
d62a17ae | 386 | if (fec->label_index != MPLS_INVALID_LABEL_INDEX |
387 | && zvrf->mpls_srgb.start_label | |
388 | && ((label = zvrf->mpls_srgb.start_label + fec->label_index) | |
389 | < zvrf->mpls_srgb.end_label)) | |
390 | fec->label = label; | |
391 | else | |
392 | fec->label = MPLS_INVALID_LABEL; | |
28d58fd7 | 393 | |
d62a17ae | 394 | return fec->label; |
28d58fd7 VV |
395 | } |
396 | ||
a64448ba DS |
397 | /* |
398 | * There is a change for this FEC. Install or uninstall label forwarding | |
399 | * entries, as appropriate. | |
400 | */ | |
60e36561 | 401 | static int fec_change_update_lsp(struct zebra_vrf *zvrf, struct zebra_fec *fec, |
d62a17ae | 402 | mpls_label_t old_label) |
a64448ba | 403 | { |
d62a17ae | 404 | struct route_table *table; |
405 | struct route_node *rn; | |
406 | struct route_entry *re; | |
407 | afi_t afi; | |
a64448ba | 408 | |
d62a17ae | 409 | /* Uninstall label forwarding entry, if previously installed. */ |
996c9314 LB |
410 | if (old_label != MPLS_INVALID_LABEL |
411 | && old_label != MPLS_LABEL_IMPLICIT_NULL) | |
d62a17ae | 412 | lsp_uninstall(zvrf, old_label); |
a64448ba | 413 | |
d62a17ae | 414 | /* Install label forwarding entry corr. to new label, if needed. */ |
415 | if (fec->label == MPLS_INVALID_LABEL | |
70e98a7f | 416 | || fec->label == MPLS_LABEL_IMPLICIT_NULL) |
d62a17ae | 417 | return 0; |
a64448ba | 418 | |
d62a17ae | 419 | afi = family2afi(PREFIX_FAMILY(&fec->rn->p)); |
420 | table = zebra_vrf_table(afi, SAFI_UNICAST, zvrf_id(zvrf)); | |
421 | if (!table) | |
422 | return 0; | |
a64448ba | 423 | |
d62a17ae | 424 | /* See if labeled route exists. */ |
425 | rn = route_node_lookup(table, &fec->rn->p); | |
426 | if (!rn) | |
427 | return 0; | |
a64448ba | 428 | |
a2addae8 | 429 | RNODE_FOREACH_RE (rn, re) { |
d62a17ae | 430 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) |
431 | break; | |
432 | } | |
a64448ba | 433 | |
d62a17ae | 434 | if (!re || !zebra_rib_labeled_unicast(re)) |
435 | return 0; | |
a64448ba | 436 | |
d62a17ae | 437 | if (lsp_install(zvrf, fec->label, rn, re)) |
438 | return -1; | |
a64448ba | 439 | |
d62a17ae | 440 | return 0; |
a64448ba DS |
441 | } |
442 | ||
5aba114a DS |
443 | /* |
444 | * Inform about FEC to a registered client. | |
445 | */ | |
60e36561 | 446 | static int fec_send(struct zebra_fec *fec, struct zserv *client) |
5aba114a | 447 | { |
d62a17ae | 448 | struct stream *s; |
449 | struct route_node *rn; | |
5aba114a | 450 | |
d62a17ae | 451 | rn = fec->rn; |
5aba114a | 452 | |
d62a17ae | 453 | /* Get output stream. */ |
1002497a | 454 | s = stream_new(ZEBRA_MAX_PACKET_SIZ); |
5aba114a | 455 | |
7cf15b25 | 456 | zclient_create_header(s, ZEBRA_FEC_UPDATE, VRF_DEFAULT); |
5aba114a | 457 | |
d62a17ae | 458 | stream_putw(s, rn->p.family); |
459 | stream_put_prefix(s, &rn->p); | |
460 | stream_putl(s, fec->label); | |
461 | stream_putw_at(s, 0, stream_get_endp(s)); | |
21ccc0cf | 462 | return zserv_send_message(client, s); |
5aba114a DS |
463 | } |
464 | ||
465 | /* | |
466 | * Update all registered clients about this FEC. Caller should've updated | |
467 | * FEC and ensure no duplicate updates. | |
468 | */ | |
60e36561 | 469 | static void fec_update_clients(struct zebra_fec *fec) |
5aba114a | 470 | { |
d62a17ae | 471 | struct listnode *node; |
472 | struct zserv *client; | |
5aba114a | 473 | |
d62a17ae | 474 | for (ALL_LIST_ELEMENTS_RO(fec->client_list, node, client)) { |
475 | if (IS_ZEBRA_DEBUG_MPLS) | |
476 | zlog_debug("Update client %s", | |
477 | zebra_route_string(client->proto)); | |
478 | fec_send(fec, client); | |
479 | } | |
5aba114a DS |
480 | } |
481 | ||
482 | ||
f31e084c DS |
483 | /* |
484 | * Print a FEC-label binding entry. | |
485 | */ | |
60e36561 | 486 | static void fec_print(struct zebra_fec *fec, struct vty *vty) |
d62a17ae | 487 | { |
488 | struct route_node *rn; | |
489 | struct listnode *node; | |
490 | struct zserv *client; | |
491 | char buf[BUFSIZ]; | |
492 | ||
493 | rn = fec->rn; | |
b467b4b4 | 494 | vty_out(vty, "%pRN\n", rn); |
d62a17ae | 495 | vty_out(vty, " Label: %s", label2str(fec->label, buf, BUFSIZ)); |
496 | if (fec->label_index != MPLS_INVALID_LABEL_INDEX) | |
497 | vty_out(vty, ", Label Index: %u", fec->label_index); | |
498 | vty_out(vty, "\n"); | |
499 | if (!list_isempty(fec->client_list)) { | |
500 | vty_out(vty, " Client list:"); | |
501 | for (ALL_LIST_ELEMENTS_RO(fec->client_list, node, client)) | |
502 | vty_out(vty, " %s(fd %d)", | |
503 | zebra_route_string(client->proto), | |
504 | client->sock); | |
505 | vty_out(vty, "\n"); | |
506 | } | |
f31e084c DS |
507 | } |
508 | ||
509 | /* | |
510 | * Locate FEC-label binding that matches with passed info. | |
511 | */ | |
60e36561 | 512 | static struct zebra_fec *fec_find(struct route_table *table, struct prefix *p) |
f31e084c | 513 | { |
d62a17ae | 514 | struct route_node *rn; |
f31e084c | 515 | |
d62a17ae | 516 | apply_mask(p); |
517 | rn = route_node_lookup(table, p); | |
518 | if (!rn) | |
519 | return NULL; | |
f31e084c | 520 | |
d62a17ae | 521 | route_unlock_node(rn); |
522 | return (rn->info); | |
f31e084c DS |
523 | } |
524 | ||
525 | /* | |
5aba114a DS |
526 | * Add a FEC. This may be upon a client registering for a binding |
527 | * or when a binding is configured. | |
f31e084c | 528 | */ |
60e36561 DS |
529 | static struct zebra_fec *fec_add(struct route_table *table, struct prefix *p, |
530 | mpls_label_t label, uint32_t flags, | |
531 | uint32_t label_index) | |
f31e084c | 532 | { |
d62a17ae | 533 | struct route_node *rn; |
60e36561 | 534 | struct zebra_fec *fec; |
f31e084c | 535 | |
d62a17ae | 536 | apply_mask(p); |
f31e084c | 537 | |
d62a17ae | 538 | /* Lookup (or add) route node.*/ |
539 | rn = route_node_get(table, p); | |
540 | if (!rn) | |
541 | return NULL; | |
f31e084c | 542 | |
d62a17ae | 543 | fec = rn->info; |
f31e084c | 544 | |
d62a17ae | 545 | if (!fec) { |
60e36561 | 546 | fec = XCALLOC(MTYPE_FEC, sizeof(struct zebra_fec)); |
f31e084c | 547 | |
d62a17ae | 548 | rn->info = fec; |
549 | fec->rn = rn; | |
550 | fec->label = label; | |
551 | fec->client_list = list_new(); | |
552 | } else | |
553 | route_unlock_node(rn); /* for the route_node_get */ | |
f31e084c | 554 | |
d62a17ae | 555 | fec->label_index = label_index; |
556 | fec->flags = flags; | |
f31e084c | 557 | |
d62a17ae | 558 | return fec; |
f31e084c DS |
559 | } |
560 | ||
561 | /* | |
5aba114a DS |
562 | * Delete a FEC. This may be upon the last client deregistering for |
563 | * a FEC and no binding exists or when the binding is deleted and there | |
564 | * are no registered clients. | |
f31e084c | 565 | */ |
60e36561 | 566 | static int fec_del(struct zebra_fec *fec) |
f31e084c | 567 | { |
6a154c88 | 568 | list_delete(&fec->client_list); |
d62a17ae | 569 | fec->rn->info = NULL; |
570 | route_unlock_node(fec->rn); | |
571 | XFREE(MTYPE_FEC, fec); | |
572 | return 0; | |
f31e084c DS |
573 | } |
574 | ||
7758e3f3 | 575 | /* |
576 | * Hash function for label. | |
577 | */ | |
d8b87afe | 578 | static unsigned int label_hash(const void *p) |
7758e3f3 | 579 | { |
a7d2146a | 580 | const struct zebra_ile *ile = p; |
7758e3f3 | 581 | |
d62a17ae | 582 | return (jhash_1word(ile->in_label, 0)); |
7758e3f3 | 583 | } |
584 | ||
585 | /* | |
586 | * Compare 2 LSP hash entries based on in-label. | |
587 | */ | |
74df8d6d | 588 | static bool label_cmp(const void *p1, const void *p2) |
7758e3f3 | 589 | { |
a7d2146a DS |
590 | const struct zebra_ile *ile1 = p1; |
591 | const struct zebra_ile *ile2 = p2; | |
7758e3f3 | 592 | |
d62a17ae | 593 | return (ile1->in_label == ile2->in_label); |
7758e3f3 | 594 | } |
595 | ||
40c7bdb0 | 596 | /* |
597 | * Check if an IPv4 nexthop for a NHLFE is active. Update nexthop based on | |
598 | * the passed flag. | |
599 | * NOTE: Looking only for connected routes right now. | |
600 | */ | |
f2595bd5 | 601 | static int nhlfe_nexthop_active_ipv4(struct zebra_nhlfe *nhlfe, |
d62a17ae | 602 | struct nexthop *nexthop) |
40c7bdb0 | 603 | { |
d62a17ae | 604 | struct route_table *table; |
605 | struct prefix_ipv4 p; | |
606 | struct route_node *rn; | |
607 | struct route_entry *match; | |
608 | struct nexthop *match_nh; | |
40c7bdb0 | 609 | |
4a7371e9 | 610 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, nexthop->vrf_id); |
d62a17ae | 611 | if (!table) |
612 | return 0; | |
40c7bdb0 | 613 | |
d62a17ae | 614 | /* Lookup nexthop in IPv4 routing table. */ |
6006b807 | 615 | memset(&p, 0, sizeof(p)); |
d62a17ae | 616 | p.family = AF_INET; |
936fbaef | 617 | p.prefixlen = IPV4_MAX_BITLEN; |
d62a17ae | 618 | p.prefix = nexthop->gate.ipv4; |
40c7bdb0 | 619 | |
d62a17ae | 620 | rn = route_node_match(table, (struct prefix *)&p); |
621 | if (!rn) | |
622 | return 0; | |
40c7bdb0 | 623 | |
d62a17ae | 624 | route_unlock_node(rn); |
88d88a9c | 625 | |
d62a17ae | 626 | /* Locate a valid connected route. */ |
a2addae8 | 627 | RNODE_FOREACH_RE (rn, match) { |
d62a17ae | 628 | if (CHECK_FLAG(match->status, ROUTE_ENTRY_REMOVED) |
629 | || !CHECK_FLAG(match->flags, ZEBRA_FLAG_SELECTED)) | |
630 | continue; | |
631 | ||
c415d895 | 632 | for (match_nh = match->nhe->nhg.nexthop; match_nh; |
d62a17ae | 633 | match_nh = match_nh->next) { |
634 | if (match->type == ZEBRA_ROUTE_CONNECT | |
635 | || nexthop->ifindex == match_nh->ifindex) { | |
636 | nexthop->ifindex = match_nh->ifindex; | |
637 | return 1; | |
638 | } | |
639 | } | |
88d88a9c | 640 | } |
40c7bdb0 | 641 | |
d62a17ae | 642 | return 0; |
40c7bdb0 | 643 | } |
644 | ||
645 | ||
646 | /* | |
647 | * Check if an IPv6 nexthop for a NHLFE is active. Update nexthop based on | |
648 | * the passed flag. | |
649 | * NOTE: Looking only for connected routes right now. | |
650 | */ | |
f2595bd5 | 651 | static int nhlfe_nexthop_active_ipv6(struct zebra_nhlfe *nhlfe, |
d62a17ae | 652 | struct nexthop *nexthop) |
40c7bdb0 | 653 | { |
d62a17ae | 654 | struct route_table *table; |
655 | struct prefix_ipv6 p; | |
656 | struct route_node *rn; | |
657 | struct route_entry *match; | |
40c7bdb0 | 658 | |
4a7371e9 | 659 | table = zebra_vrf_table(AFI_IP6, SAFI_UNICAST, nexthop->vrf_id); |
d62a17ae | 660 | if (!table) |
661 | return 0; | |
40c7bdb0 | 662 | |
d62a17ae | 663 | /* Lookup nexthop in IPv6 routing table. */ |
6006b807 | 664 | memset(&p, 0, sizeof(p)); |
d62a17ae | 665 | p.family = AF_INET6; |
f4d81e55 | 666 | p.prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 667 | p.prefix = nexthop->gate.ipv6; |
40c7bdb0 | 668 | |
d62a17ae | 669 | rn = route_node_match(table, (struct prefix *)&p); |
670 | if (!rn) | |
671 | return 0; | |
40c7bdb0 | 672 | |
d62a17ae | 673 | route_unlock_node(rn); |
40c7bdb0 | 674 | |
d62a17ae | 675 | /* Locate a valid connected route. */ |
a2addae8 | 676 | RNODE_FOREACH_RE (rn, match) { |
d62a17ae | 677 | if ((match->type == ZEBRA_ROUTE_CONNECT) |
678 | && !CHECK_FLAG(match->status, ROUTE_ENTRY_REMOVED) | |
679 | && CHECK_FLAG(match->flags, ZEBRA_FLAG_SELECTED)) | |
680 | break; | |
681 | } | |
40c7bdb0 | 682 | |
c415d895 | 683 | if (!match || !match->nhe->nhg.nexthop) |
d62a17ae | 684 | return 0; |
40c7bdb0 | 685 | |
c415d895 | 686 | nexthop->ifindex = match->nhe->nhg.nexthop->ifindex; |
d62a17ae | 687 | return 1; |
40c7bdb0 | 688 | } |
689 | ||
690 | ||
691 | /* | |
692 | * Check the nexthop reachability for a NHLFE and return if valid (reachable) | |
693 | * or not. | |
694 | * NOTE: Each NHLFE points to only 1 nexthop. | |
695 | */ | |
f2595bd5 | 696 | static int nhlfe_nexthop_active(struct zebra_nhlfe *nhlfe) |
d62a17ae | 697 | { |
698 | struct nexthop *nexthop; | |
699 | struct interface *ifp; | |
86f07f44 | 700 | struct zebra_ns *zns; |
d62a17ae | 701 | |
702 | nexthop = nhlfe->nexthop; | |
703 | if (!nexthop) // unexpected | |
704 | return 0; | |
705 | ||
706 | /* Check on nexthop based on type. */ | |
707 | switch (nexthop->type) { | |
b9abd9ad DS |
708 | case NEXTHOP_TYPE_IFINDEX: |
709 | /* | |
710 | * Lookup if this type is special. The | |
711 | * NEXTHOP_TYPE_IFINDEX is a pop and | |
712 | * forward into a different table for | |
713 | * processing. As such this ifindex | |
714 | * passed to us may be a VRF device | |
715 | * which will not be in the default | |
716 | * VRF. So let's look in all of them | |
717 | */ | |
86f07f44 PG |
718 | zns = zebra_ns_lookup(NS_DEFAULT); |
719 | ifp = if_lookup_by_index_per_ns(zns, nexthop->ifindex); | |
b9abd9ad DS |
720 | if (ifp && if_is_operative(ifp)) |
721 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
722 | else | |
723 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
724 | break; | |
d62a17ae | 725 | case NEXTHOP_TYPE_IPV4: |
726 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
727 | if (nhlfe_nexthop_active_ipv4(nhlfe, nexthop)) | |
728 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
729 | else | |
730 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
731 | break; | |
732 | ||
733 | case NEXTHOP_TYPE_IPV6: | |
734 | if (nhlfe_nexthop_active_ipv6(nhlfe, nexthop)) | |
735 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
736 | else | |
737 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
738 | break; | |
739 | ||
740 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
741 | if (IN6_IS_ADDR_LINKLOCAL(&nexthop->gate.ipv6)) { | |
4a7371e9 DS |
742 | ifp = if_lookup_by_index(nexthop->ifindex, |
743 | nexthop->vrf_id); | |
d62a17ae | 744 | if (ifp && if_is_operative(ifp)) |
745 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
746 | else | |
747 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
748 | } else { | |
749 | if (nhlfe_nexthop_active_ipv6(nhlfe, nexthop)) | |
750 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
751 | else | |
752 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
753 | } | |
754 | break; | |
755 | ||
10cc80ca | 756 | case NEXTHOP_TYPE_BLACKHOLE: |
d62a17ae | 757 | break; |
758 | } | |
759 | ||
760 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
40c7bdb0 | 761 | } |
762 | ||
763 | /* | |
764 | * Walk through NHLFEs for a LSP forwarding entry, verify nexthop | |
765 | * reachability and select the best. Multipath entries are also | |
766 | * marked. This is invoked when an LSP scheduled for processing (due | |
767 | * to some change) is examined. | |
768 | */ | |
8f74a383 | 769 | static void lsp_select_best_nhlfe(struct zebra_lsp *lsp) |
d62a17ae | 770 | { |
f2595bd5 DS |
771 | struct zebra_nhlfe *nhlfe; |
772 | struct zebra_nhlfe *best; | |
d62a17ae | 773 | struct nexthop *nexthop; |
774 | int changed = 0; | |
775 | ||
776 | if (!lsp) | |
777 | return; | |
778 | ||
779 | best = NULL; | |
780 | lsp->num_ecmp = 0; | |
781 | UNSET_FLAG(lsp->flags, LSP_FLAG_CHANGED); | |
782 | ||
783 | /* | |
784 | * First compute the best path, after checking nexthop status. We are | |
5e29e1a1 | 785 | * only concerned with non-deleted NHLFEs. |
d62a17ae | 786 | */ |
ee70f629 | 787 | frr_each_safe(nhlfe_list, &lsp->nhlfe_list, nhlfe) { |
d62a17ae | 788 | /* Clear selection flags. */ |
789 | UNSET_FLAG(nhlfe->flags, | |
790 | (NHLFE_FLAG_SELECTED | NHLFE_FLAG_MULTIPATH)); | |
791 | ||
792 | if (!CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED) | |
793 | && nhlfe_nexthop_active(nhlfe)) { | |
794 | if (!best || (nhlfe->distance < best->distance)) | |
795 | best = nhlfe; | |
796 | } | |
797 | } | |
798 | ||
799 | lsp->best_nhlfe = best; | |
800 | if (!lsp->best_nhlfe) | |
801 | return; | |
802 | ||
5e29e1a1 MS |
803 | /* |
804 | * Check the active status of backup nhlfes also | |
805 | */ | |
806 | frr_each_safe(nhlfe_list, &lsp->backup_nhlfe_list, nhlfe) { | |
807 | if (!CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED)) | |
808 | (void)nhlfe_nexthop_active(nhlfe); | |
809 | } | |
810 | ||
d62a17ae | 811 | /* Mark best NHLFE as selected. */ |
812 | SET_FLAG(lsp->best_nhlfe->flags, NHLFE_FLAG_SELECTED); | |
813 | ||
814 | /* | |
815 | * If best path exists, see if there is ECMP. While doing this, note if | |
816 | * a | |
817 | * new (uninstalled) NHLFE has been selected, an installed entry that is | |
818 | * still selected has a change or an installed entry is to be removed. | |
819 | */ | |
ee70f629 | 820 | frr_each(nhlfe_list, &lsp->nhlfe_list, nhlfe) { |
d62a17ae | 821 | int nh_chg, nh_sel, nh_inst; |
822 | ||
823 | nexthop = nhlfe->nexthop; | |
824 | if (!nexthop) // unexpected | |
825 | continue; | |
826 | ||
827 | if (!CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED) | |
828 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE) | |
829 | && (nhlfe->distance == lsp->best_nhlfe->distance)) { | |
830 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED); | |
831 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_MULTIPATH); | |
832 | lsp->num_ecmp++; | |
833 | } | |
834 | ||
835 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED) && !changed) { | |
836 | nh_chg = CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
837 | nh_sel = CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED); | |
838 | nh_inst = | |
839 | CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
840 | ||
841 | if ((nh_sel && !nh_inst) | |
842 | || (nh_sel && nh_inst && nh_chg) | |
843 | || (nh_inst && !nh_sel)) | |
844 | changed = 1; | |
845 | } | |
846 | ||
847 | /* We have finished examining, clear changed flag. */ | |
848 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
849 | } | |
850 | ||
851 | if (changed) | |
852 | SET_FLAG(lsp->flags, LSP_FLAG_CHANGED); | |
40c7bdb0 | 853 | } |
854 | ||
855 | /* | |
856 | * Delete LSP forwarding entry from kernel, if installed. Called upon | |
857 | * process exit. | |
858 | */ | |
e3b78da8 | 859 | static void lsp_uninstall_from_kernel(struct hash_bucket *bucket, void *ctxt) |
40c7bdb0 | 860 | { |
8f74a383 | 861 | struct zebra_lsp *lsp; |
40c7bdb0 | 862 | |
8f74a383 | 863 | lsp = (struct zebra_lsp *)bucket->data; |
4a83e7a0 | 864 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) |
8a6423a3 | 865 | (void)dplane_lsp_delete(lsp); |
40c7bdb0 | 866 | } |
867 | ||
868 | /* | |
869 | * Schedule LSP forwarding entry for processing. Called upon changes | |
870 | * that may impact LSPs such as nexthop / connected route changes. | |
871 | */ | |
e3b78da8 | 872 | static void lsp_schedule(struct hash_bucket *bucket, void *ctxt) |
40c7bdb0 | 873 | { |
8f74a383 | 874 | struct zebra_lsp *lsp; |
40c7bdb0 | 875 | |
8f74a383 | 876 | lsp = (struct zebra_lsp *)bucket->data; |
2aa2a407 MS |
877 | |
878 | /* In the common flow, this is used when external events occur. For | |
879 | * LSPs with backup nhlfes, we'll assume that the forwarding | |
880 | * plane will use the backups to handle these events, until the | |
881 | * owning protocol can react. | |
882 | */ | |
883 | if (ctxt == NULL) { | |
884 | /* Skip LSPs with backups */ | |
885 | if (nhlfe_list_first(&lsp->backup_nhlfe_list) != NULL) { | |
886 | if (IS_ZEBRA_DEBUG_MPLS_DETAIL) | |
887 | zlog_debug("%s: skip LSP in-label %u", | |
888 | __func__, lsp->ile.in_label); | |
889 | return; | |
890 | } | |
891 | } | |
892 | ||
0af35d90 | 893 | (void)lsp_processq_add(lsp); |
40c7bdb0 | 894 | } |
895 | ||
896 | /* | |
897 | * Process a LSP entry that is in the queue. Recalculate best NHLFE and | |
898 | * any multipaths and update or delete from the kernel, as needed. | |
899 | */ | |
d62a17ae | 900 | static wq_item_status lsp_process(struct work_queue *wq, void *data) |
901 | { | |
8f74a383 | 902 | struct zebra_lsp *lsp; |
f2595bd5 | 903 | struct zebra_nhlfe *oldbest, *newbest; |
d62a17ae | 904 | char buf[BUFSIZ], buf2[BUFSIZ]; |
905 | struct zebra_vrf *zvrf = vrf_info_lookup(VRF_DEFAULT); | |
d37f4d6c | 906 | enum zebra_dplane_result res; |
d62a17ae | 907 | |
8f74a383 | 908 | lsp = (struct zebra_lsp *)data; |
d62a17ae | 909 | if (!lsp) // unexpected |
910 | return WQ_SUCCESS; | |
911 | ||
912 | oldbest = lsp->best_nhlfe; | |
913 | ||
914 | /* Select best NHLFE(s) */ | |
915 | lsp_select_best_nhlfe(lsp); | |
916 | ||
917 | newbest = lsp->best_nhlfe; | |
918 | ||
919 | if (IS_ZEBRA_DEBUG_MPLS) { | |
920 | if (oldbest) | |
5e29e1a1 | 921 | nhlfe2str(oldbest, buf, sizeof(buf)); |
d62a17ae | 922 | if (newbest) |
5e29e1a1 | 923 | nhlfe2str(newbest, buf2, sizeof(buf2)); |
d62a17ae | 924 | zlog_debug( |
3efd0893 | 925 | "Process LSP in-label %u oldbest %s newbest %s flags 0x%x ecmp# %d", |
d62a17ae | 926 | lsp->ile.in_label, oldbest ? buf : "NULL", |
927 | newbest ? buf2 : "NULL", lsp->flags, lsp->num_ecmp); | |
928 | } | |
929 | ||
930 | if (!CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) { | |
931 | /* Not already installed */ | |
932 | if (newbest) { | |
2b63430c DS |
933 | |
934 | UNSET_FLAG(lsp->flags, LSP_FLAG_CHANGED); | |
d37f4d6c MS |
935 | |
936 | switch (dplane_lsp_add(lsp)) { | |
ea1c14f6 | 937 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
d37f4d6c MS |
938 | /* Set 'installed' flag so we will know |
939 | * that an install is in-flight. | |
940 | */ | |
941 | SET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); | |
942 | ||
943 | zvrf->lsp_installs_queued++; | |
7c5d0e18 | 944 | break; |
ea1c14f6 | 945 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
d37f4d6c MS |
946 | flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE, |
947 | "LSP Install Failure: %u", | |
948 | lsp->ile.in_label); | |
7c5d0e18 | 949 | break; |
ea1c14f6 | 950 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
7c5d0e18 DS |
951 | zvrf->lsp_installs++; |
952 | break; | |
953 | } | |
d62a17ae | 954 | } |
955 | } else { | |
956 | /* Installed, may need an update and/or delete. */ | |
957 | if (!newbest) { | |
d37f4d6c MS |
958 | res = dplane_lsp_delete(lsp); |
959 | ||
960 | /* We do some of the lsp cleanup immediately for | |
961 | * deletes. | |
962 | */ | |
963 | UNSET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); | |
964 | clear_nhlfe_installed(lsp); | |
e6d44ec7 | 965 | |
d37f4d6c | 966 | switch (res) { |
ea1c14f6 | 967 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
d37f4d6c | 968 | zvrf->lsp_removals_queued++; |
7c5d0e18 | 969 | break; |
ea1c14f6 | 970 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
d37f4d6c MS |
971 | flog_warn(EC_ZEBRA_LSP_DELETE_FAILURE, |
972 | "LSP Deletion Failure: %u", | |
973 | lsp->ile.in_label); | |
7c5d0e18 | 974 | break; |
ea1c14f6 | 975 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
7c5d0e18 DS |
976 | zvrf->lsp_removals++; |
977 | break; | |
978 | } | |
d62a17ae | 979 | } else if (CHECK_FLAG(lsp->flags, LSP_FLAG_CHANGED)) { |
f2595bd5 | 980 | struct zebra_nhlfe *nhlfe; |
9fa38ec6 | 981 | struct nexthop *nexthop; |
2b63430c DS |
982 | |
983 | UNSET_FLAG(lsp->flags, LSP_FLAG_CHANGED); | |
d37f4d6c MS |
984 | |
985 | /* We leave the INSTALLED flag set here | |
e4a1ec74 | 986 | * so we know an update is in-flight. |
d37f4d6c | 987 | */ |
e6d44ec7 | 988 | |
9fa38ec6 DS |
989 | /* |
990 | * Any NHLFE that was installed but is not | |
991 | * selected now needs to have its flags updated. | |
992 | */ | |
ee70f629 | 993 | frr_each_safe(nhlfe_list, &lsp->nhlfe_list, nhlfe) { |
9fa38ec6 DS |
994 | nexthop = nhlfe->nexthop; |
995 | if (!nexthop) | |
996 | continue; | |
997 | ||
998 | if (CHECK_FLAG(nhlfe->flags, | |
996c9314 LB |
999 | NHLFE_FLAG_INSTALLED) |
1000 | && !CHECK_FLAG(nhlfe->flags, | |
1001 | NHLFE_FLAG_SELECTED)) { | |
9fa38ec6 DS |
1002 | UNSET_FLAG(nhlfe->flags, |
1003 | NHLFE_FLAG_INSTALLED); | |
1004 | UNSET_FLAG(nexthop->flags, | |
1005 | NEXTHOP_FLAG_FIB); | |
1006 | } | |
1007 | } | |
1008 | ||
d37f4d6c | 1009 | switch (dplane_lsp_update(lsp)) { |
ea1c14f6 | 1010 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
d37f4d6c | 1011 | zvrf->lsp_installs_queued++; |
7c5d0e18 | 1012 | break; |
ea1c14f6 | 1013 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
d37f4d6c MS |
1014 | flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE, |
1015 | "LSP Update Failure: %u", | |
1016 | lsp->ile.in_label); | |
7c5d0e18 | 1017 | break; |
ea1c14f6 | 1018 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
7c5d0e18 DS |
1019 | zvrf->lsp_installs++; |
1020 | break; | |
1021 | } | |
d62a17ae | 1022 | } |
1023 | } | |
1024 | ||
1025 | return WQ_SUCCESS; | |
40c7bdb0 | 1026 | } |
1027 | ||
1028 | ||
1029 | /* | |
1030 | * Callback upon processing completion of a LSP forwarding entry. | |
1031 | */ | |
d62a17ae | 1032 | static void lsp_processq_del(struct work_queue *wq, void *data) |
40c7bdb0 | 1033 | { |
d62a17ae | 1034 | struct zebra_vrf *zvrf; |
8f74a383 | 1035 | struct zebra_lsp *lsp; |
d62a17ae | 1036 | struct hash *lsp_table; |
f2595bd5 | 1037 | struct zebra_nhlfe *nhlfe; |
b0d10d93 MS |
1038 | bool in_shutdown = false; |
1039 | ||
1040 | /* If zebra is shutting down, don't delete any structs, | |
1041 | * just ignore this callback. The LSPs will be cleaned up | |
1042 | * during the shutdown processing. | |
1043 | */ | |
1044 | in_shutdown = atomic_load_explicit(&zrouter.in_shutdown, | |
1045 | memory_order_relaxed); | |
1046 | if (in_shutdown) | |
1047 | return; | |
40c7bdb0 | 1048 | |
d62a17ae | 1049 | zvrf = vrf_info_lookup(VRF_DEFAULT); |
1050 | assert(zvrf); | |
40c7bdb0 | 1051 | |
d62a17ae | 1052 | lsp_table = zvrf->lsp_table; |
1053 | if (!lsp_table) // unexpected | |
1054 | return; | |
40c7bdb0 | 1055 | |
8f74a383 | 1056 | lsp = (struct zebra_lsp *)data; |
d62a17ae | 1057 | if (!lsp) // unexpected |
1058 | return; | |
40c7bdb0 | 1059 | |
d62a17ae | 1060 | /* Clear flag, remove any NHLFEs marked for deletion. If no NHLFEs |
1061 | * exist, | |
1062 | * delete LSP entry also. | |
1063 | */ | |
1064 | UNSET_FLAG(lsp->flags, LSP_FLAG_SCHEDULED); | |
40c7bdb0 | 1065 | |
ee70f629 | 1066 | frr_each_safe(nhlfe_list, &lsp->nhlfe_list, nhlfe) { |
d62a17ae | 1067 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED)) |
1068 | nhlfe_del(nhlfe); | |
1069 | } | |
40c7bdb0 | 1070 | |
1323491d MS |
1071 | frr_each_safe(nhlfe_list, &lsp->backup_nhlfe_list, nhlfe) { |
1072 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED)) | |
1073 | nhlfe_del(nhlfe); | |
1074 | } | |
1075 | ||
1076 | lsp_check_free(lsp_table, &lsp); | |
40c7bdb0 | 1077 | } |
1078 | ||
1079 | /* | |
1080 | * Callback upon finishing the processing of all scheduled | |
1081 | * LSP forwarding entries. | |
1082 | */ | |
d62a17ae | 1083 | static void lsp_processq_complete(struct work_queue *wq) |
40c7bdb0 | 1084 | { |
d62a17ae | 1085 | /* Nothing to do for now. */ |
40c7bdb0 | 1086 | } |
1087 | ||
1088 | /* | |
1089 | * Add LSP forwarding entry to queue for subsequent processing. | |
1090 | */ | |
8f74a383 | 1091 | static int lsp_processq_add(struct zebra_lsp *lsp) |
40c7bdb0 | 1092 | { |
d62a17ae | 1093 | /* If already scheduled, exit. */ |
1094 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_SCHEDULED)) | |
1095 | return 0; | |
40c7bdb0 | 1096 | |
e2353ec2 | 1097 | if (zrouter.lsp_process_q == NULL) { |
e914ccbe | 1098 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 1099 | "%s: work_queue does not exist!", __func__); |
d62a17ae | 1100 | return -1; |
1101 | } | |
33c32282 | 1102 | |
e2353ec2 | 1103 | work_queue_add(zrouter.lsp_process_q, lsp); |
d62a17ae | 1104 | SET_FLAG(lsp->flags, LSP_FLAG_SCHEDULED); |
1105 | return 0; | |
40c7bdb0 | 1106 | } |
1107 | ||
1108 | /* | |
1109 | * Callback to allocate LSP forwarding table entry. | |
1110 | */ | |
d62a17ae | 1111 | static void *lsp_alloc(void *p) |
40c7bdb0 | 1112 | { |
a7d2146a | 1113 | const struct zebra_ile *ile = p; |
8f74a383 | 1114 | struct zebra_lsp *lsp; |
40c7bdb0 | 1115 | |
8f74a383 | 1116 | lsp = XCALLOC(MTYPE_LSP, sizeof(struct zebra_lsp)); |
d62a17ae | 1117 | lsp->ile = *ile; |
ee70f629 | 1118 | nhlfe_list_init(&lsp->nhlfe_list); |
cd4bb96f | 1119 | nhlfe_list_init(&lsp->backup_nhlfe_list); |
40c7bdb0 | 1120 | |
d62a17ae | 1121 | if (IS_ZEBRA_DEBUG_MPLS) |
1122 | zlog_debug("Alloc LSP in-label %u", lsp->ile.in_label); | |
40c7bdb0 | 1123 | |
d62a17ae | 1124 | return ((void *)lsp); |
40c7bdb0 | 1125 | } |
1126 | ||
1323491d MS |
1127 | /* |
1128 | * Check whether lsp can be freed - no nhlfes, e.g., and call free api | |
1129 | */ | |
8f74a383 | 1130 | static void lsp_check_free(struct hash *lsp_table, struct zebra_lsp **plsp) |
1323491d | 1131 | { |
8f74a383 | 1132 | struct zebra_lsp *lsp; |
1323491d MS |
1133 | |
1134 | if (plsp == NULL || *plsp == NULL) | |
1135 | return; | |
1136 | ||
1137 | lsp = *plsp; | |
1138 | ||
1139 | if ((nhlfe_list_first(&lsp->nhlfe_list) == NULL) && | |
1140 | (nhlfe_list_first(&lsp->backup_nhlfe_list) == NULL) && | |
1141 | !CHECK_FLAG(lsp->flags, LSP_FLAG_SCHEDULED)) | |
1142 | lsp_free(lsp_table, plsp); | |
1143 | } | |
1144 | ||
ebab422a MS |
1145 | /* |
1146 | * Dtor for an LSP: remove from ile hash, release any internal allocations, | |
1147 | * free LSP object. | |
1148 | */ | |
8f74a383 | 1149 | static void lsp_free(struct hash *lsp_table, struct zebra_lsp **plsp) |
ebab422a | 1150 | { |
8f74a383 | 1151 | struct zebra_lsp *lsp; |
f2595bd5 | 1152 | struct zebra_nhlfe *nhlfe; |
ebab422a MS |
1153 | |
1154 | if (plsp == NULL || *plsp == NULL) | |
1155 | return; | |
1156 | ||
1157 | lsp = *plsp; | |
1158 | ||
1159 | if (IS_ZEBRA_DEBUG_MPLS) | |
1160 | zlog_debug("Free LSP in-label %u flags 0x%x", | |
1161 | lsp->ile.in_label, lsp->flags); | |
1162 | ||
1163 | /* Free nhlfes, if any. */ | |
ee70f629 | 1164 | frr_each_safe(nhlfe_list, &lsp->nhlfe_list, nhlfe) |
ebab422a | 1165 | nhlfe_del(nhlfe); |
ebab422a | 1166 | |
cd4bb96f MS |
1167 | /* Free backup nhlfes, if any. */ |
1168 | frr_each_safe(nhlfe_list, &lsp->backup_nhlfe_list, nhlfe) | |
1169 | nhlfe_del(nhlfe); | |
1170 | ||
ebab422a MS |
1171 | hash_release(lsp_table, &lsp->ile); |
1172 | XFREE(MTYPE_LSP, lsp); | |
1173 | ||
1174 | *plsp = NULL; | |
1175 | } | |
1176 | ||
40c7bdb0 | 1177 | /* |
1178 | * Create printable string for NHLFE entry. | |
1179 | */ | |
f2595bd5 | 1180 | static char *nhlfe2str(const struct zebra_nhlfe *nhlfe, char *buf, int size) |
40c7bdb0 | 1181 | { |
608a57c0 | 1182 | const struct nexthop *nexthop; |
40c7bdb0 | 1183 | |
d62a17ae | 1184 | buf[0] = '\0'; |
1185 | nexthop = nhlfe->nexthop; | |
1186 | switch (nexthop->type) { | |
1187 | case NEXTHOP_TYPE_IPV4: | |
1188 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1189 | inet_ntop(AF_INET, &nexthop->gate.ipv4, buf, size); | |
1190 | break; | |
1191 | case NEXTHOP_TYPE_IPV6: | |
be489c57 | 1192 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
d62a17ae | 1193 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, buf, size); |
1194 | break; | |
b9abd9ad DS |
1195 | case NEXTHOP_TYPE_IFINDEX: |
1196 | snprintf(buf, size, "Ifindex: %u", nexthop->ifindex); | |
10cc80ca | 1197 | case NEXTHOP_TYPE_BLACKHOLE: |
d62a17ae | 1198 | break; |
1199 | } | |
40c7bdb0 | 1200 | |
d62a17ae | 1201 | return buf; |
40c7bdb0 | 1202 | } |
1203 | ||
1204 | /* | |
1205 | * Check if NHLFE matches with search info passed. | |
1206 | */ | |
f2595bd5 DS |
1207 | static int nhlfe_nhop_match(struct zebra_nhlfe *nhlfe, |
1208 | enum nexthop_types_t gtype, | |
e4a1ec74 | 1209 | const union g_addr *gate, ifindex_t ifindex) |
40c7bdb0 | 1210 | { |
d62a17ae | 1211 | struct nexthop *nhop; |
1212 | int cmp = 1; | |
40c7bdb0 | 1213 | |
d62a17ae | 1214 | nhop = nhlfe->nexthop; |
1215 | if (!nhop) | |
1216 | return 1; | |
40c7bdb0 | 1217 | |
d62a17ae | 1218 | if (nhop->type != gtype) |
1219 | return 1; | |
40c7bdb0 | 1220 | |
d62a17ae | 1221 | switch (nhop->type) { |
1222 | case NEXTHOP_TYPE_IPV4: | |
1223 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1224 | cmp = memcmp(&(nhop->gate.ipv4), &(gate->ipv4), | |
1225 | sizeof(struct in_addr)); | |
1226 | if (!cmp && nhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
1227 | cmp = !(nhop->ifindex == ifindex); | |
1228 | break; | |
1229 | case NEXTHOP_TYPE_IPV6: | |
1230 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1231 | cmp = memcmp(&(nhop->gate.ipv6), &(gate->ipv6), | |
1232 | sizeof(struct in6_addr)); | |
1233 | if (!cmp && nhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) | |
1234 | cmp = !(nhop->ifindex == ifindex); | |
1235 | break; | |
b9abd9ad DS |
1236 | case NEXTHOP_TYPE_IFINDEX: |
1237 | cmp = !(nhop->ifindex == ifindex); | |
1238 | break; | |
10cc80ca | 1239 | case NEXTHOP_TYPE_BLACKHOLE: |
d62a17ae | 1240 | break; |
1241 | } | |
40c7bdb0 | 1242 | |
d62a17ae | 1243 | return cmp; |
40c7bdb0 | 1244 | } |
1245 | ||
1246 | ||
1247 | /* | |
1248 | * Locate NHLFE that matches with passed info. | |
1249 | */ | |
f2595bd5 DS |
1250 | static struct zebra_nhlfe *nhlfe_find(struct nhlfe_list_head *list, |
1251 | enum lsp_types_t lsp_type, | |
1252 | enum nexthop_types_t gtype, | |
1253 | const union g_addr *gate, | |
1254 | ifindex_t ifindex) | |
40c7bdb0 | 1255 | { |
f2595bd5 | 1256 | struct zebra_nhlfe *nhlfe; |
40c7bdb0 | 1257 | |
ee70f629 | 1258 | frr_each_safe(nhlfe_list, list, nhlfe) { |
d62a17ae | 1259 | if (nhlfe->type != lsp_type) |
1260 | continue; | |
1261 | if (!nhlfe_nhop_match(nhlfe, gtype, gate, ifindex)) | |
1262 | break; | |
1263 | } | |
40c7bdb0 | 1264 | |
d62a17ae | 1265 | return nhlfe; |
40c7bdb0 | 1266 | } |
1267 | ||
ee70f629 MS |
1268 | /* |
1269 | * Allocate and init new NHLFE. | |
1270 | */ | |
f2595bd5 | 1271 | static struct zebra_nhlfe * |
8f74a383 | 1272 | nhlfe_alloc(struct zebra_lsp *lsp, enum lsp_types_t lsp_type, |
f2595bd5 DS |
1273 | enum nexthop_types_t gtype, const union g_addr *gate, |
1274 | ifindex_t ifindex, uint8_t num_labels, const mpls_label_t *labels) | |
d62a17ae | 1275 | { |
f2595bd5 | 1276 | struct zebra_nhlfe *nhlfe; |
d62a17ae | 1277 | struct nexthop *nexthop; |
1278 | ||
3e0a9b40 | 1279 | assert(lsp); |
d62a17ae | 1280 | |
f2595bd5 | 1281 | nhlfe = XCALLOC(MTYPE_NHLFE, sizeof(struct zebra_nhlfe)); |
d62a17ae | 1282 | |
1283 | nhlfe->lsp = lsp; | |
1284 | nhlfe->type = lsp_type; | |
1285 | nhlfe->distance = lsp_distance(lsp_type); | |
1286 | ||
1287 | nexthop = nexthop_new(); | |
cd4bb96f | 1288 | |
5065db0a | 1289 | nexthop_add_labels(nexthop, lsp_type, num_labels, labels); |
d62a17ae | 1290 | |
4a7371e9 | 1291 | nexthop->vrf_id = VRF_DEFAULT; |
d62a17ae | 1292 | nexthop->type = gtype; |
1293 | switch (nexthop->type) { | |
1294 | case NEXTHOP_TYPE_IPV4: | |
1295 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1296 | nexthop->gate.ipv4 = gate->ipv4; | |
1297 | if (ifindex) | |
1298 | nexthop->ifindex = ifindex; | |
1299 | break; | |
1300 | case NEXTHOP_TYPE_IPV6: | |
1301 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1302 | nexthop->gate.ipv6 = gate->ipv6; | |
1303 | if (ifindex) | |
1304 | nexthop->ifindex = ifindex; | |
1305 | break; | |
b9abd9ad DS |
1306 | case NEXTHOP_TYPE_IFINDEX: |
1307 | nexthop->ifindex = ifindex; | |
1308 | break; | |
10cc80ca | 1309 | case NEXTHOP_TYPE_BLACKHOLE: |
a44e3106 MS |
1310 | if (IS_ZEBRA_DEBUG_MPLS) |
1311 | zlog_debug("%s: invalid: blackhole nexthop", __func__); | |
1312 | ||
d62a17ae | 1313 | nexthop_free(nexthop); |
1314 | XFREE(MTYPE_NHLFE, nhlfe); | |
1315 | return NULL; | |
d62a17ae | 1316 | } |
d62a17ae | 1317 | nhlfe->nexthop = nexthop; |
ee70f629 MS |
1318 | |
1319 | return nhlfe; | |
1320 | } | |
1321 | ||
1322 | /* | |
cc1b9746 MS |
1323 | * Add primary or backup NHLFE. Base entry must have been created and |
1324 | * duplicate check done. | |
ee70f629 | 1325 | */ |
8f74a383 | 1326 | static struct zebra_nhlfe *nhlfe_add(struct zebra_lsp *lsp, |
f2595bd5 DS |
1327 | enum lsp_types_t lsp_type, |
1328 | enum nexthop_types_t gtype, | |
1329 | const union g_addr *gate, | |
1330 | ifindex_t ifindex, uint8_t num_labels, | |
1331 | const mpls_label_t *labels, bool is_backup) | |
ee70f629 | 1332 | { |
f2595bd5 | 1333 | struct zebra_nhlfe *nhlfe; |
ee70f629 MS |
1334 | |
1335 | if (!lsp) | |
1336 | return NULL; | |
1337 | ||
a44e3106 MS |
1338 | /* Must have labels */ |
1339 | if (num_labels == 0 || labels == NULL) { | |
1340 | if (IS_ZEBRA_DEBUG_MPLS) | |
1341 | zlog_debug("%s: invalid nexthop: no labels", __func__); | |
1342 | ||
1343 | return NULL; | |
1344 | } | |
1345 | ||
ee70f629 | 1346 | /* Allocate new object */ |
cd4bb96f MS |
1347 | nhlfe = nhlfe_alloc(lsp, lsp_type, gtype, gate, ifindex, num_labels, |
1348 | labels); | |
1349 | ||
6140b3b4 DS |
1350 | if (!nhlfe) |
1351 | return NULL; | |
1352 | ||
cc1b9746 MS |
1353 | /* Enqueue to LSP: primaries at head of list, backups at tail */ |
1354 | if (is_backup) { | |
1355 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_IS_BACKUP); | |
1356 | nhlfe_list_add_tail(&lsp->backup_nhlfe_list, nhlfe); | |
1357 | } else | |
1358 | nhlfe_list_add_head(&lsp->nhlfe_list, nhlfe); | |
d62a17ae | 1359 | |
1360 | return nhlfe; | |
40c7bdb0 | 1361 | } |
1362 | ||
1363 | /* | |
cd4bb96f MS |
1364 | * Common delete for NHLFEs. |
1365 | */ | |
f2595bd5 | 1366 | static void nhlfe_free(struct zebra_nhlfe *nhlfe) |
cd4bb96f MS |
1367 | { |
1368 | if (!nhlfe) | |
1369 | return; | |
1370 | ||
1371 | /* Free nexthop. */ | |
1372 | if (nhlfe->nexthop) | |
1373 | nexthop_free(nhlfe->nexthop); | |
1374 | ||
1375 | nhlfe->nexthop = NULL; | |
1376 | ||
1377 | XFREE(MTYPE_NHLFE, nhlfe); | |
1378 | } | |
1379 | ||
1380 | ||
1381 | /* | |
1382 | * Disconnect NHLFE from LSP, and free. Entry must be present on LSP's list. | |
40c7bdb0 | 1383 | */ |
f2595bd5 | 1384 | static int nhlfe_del(struct zebra_nhlfe *nhlfe) |
40c7bdb0 | 1385 | { |
8f74a383 | 1386 | struct zebra_lsp *lsp; |
40c7bdb0 | 1387 | |
d62a17ae | 1388 | if (!nhlfe) |
1389 | return -1; | |
40c7bdb0 | 1390 | |
d62a17ae | 1391 | lsp = nhlfe->lsp; |
1392 | if (!lsp) | |
1393 | return -1; | |
40c7bdb0 | 1394 | |
d62a17ae | 1395 | if (nhlfe == lsp->best_nhlfe) |
1396 | lsp->best_nhlfe = NULL; | |
bb49a121 | 1397 | |
ee70f629 | 1398 | /* Unlink from LSP */ |
cd4bb96f MS |
1399 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_IS_BACKUP)) |
1400 | nhlfe_list_del(&lsp->backup_nhlfe_list, nhlfe); | |
1401 | else | |
1402 | nhlfe_list_del(&lsp->nhlfe_list, nhlfe); | |
ee70f629 | 1403 | |
cd4bb96f MS |
1404 | nhlfe->lsp = NULL; |
1405 | ||
1406 | nhlfe_free(nhlfe); | |
40c7bdb0 | 1407 | |
d62a17ae | 1408 | return 0; |
40c7bdb0 | 1409 | } |
1410 | ||
a64448ba DS |
1411 | /* |
1412 | * Update label for NHLFE entry. | |
1413 | */ | |
f2595bd5 | 1414 | static void nhlfe_out_label_update(struct zebra_nhlfe *nhlfe, |
8ecdb26e | 1415 | struct mpls_label_stack *nh_label) |
d62a17ae | 1416 | { |
1417 | nhlfe->nexthop->nh_label->label[0] = nh_label->label[0]; | |
1418 | } | |
1419 | ||
8f74a383 | 1420 | static int mpls_lsp_uninstall_all(struct hash *lsp_table, struct zebra_lsp *lsp, |
d62a17ae | 1421 | enum lsp_types_t type) |
1422 | { | |
f2595bd5 | 1423 | struct zebra_nhlfe *nhlfe; |
d62a17ae | 1424 | int schedule_lsp = 0; |
1425 | char buf[BUFSIZ]; | |
1426 | ||
4a2a5236 MS |
1427 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) |
1428 | schedule_lsp = 1; | |
1429 | ||
d62a17ae | 1430 | /* Mark NHLFEs for delete or directly delete, as appropriate. */ |
ee70f629 | 1431 | frr_each_safe(nhlfe_list, &lsp->nhlfe_list, nhlfe) { |
d62a17ae | 1432 | /* Skip non-static NHLFEs */ |
1433 | if (nhlfe->type != type) | |
1434 | continue; | |
1435 | ||
1436 | if (IS_ZEBRA_DEBUG_MPLS) { | |
608a57c0 | 1437 | nhlfe2str(nhlfe, buf, sizeof(buf)); |
d62a17ae | 1438 | zlog_debug( |
1439 | "Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
1440 | lsp->ile.in_label, type, buf, nhlfe->flags); | |
1441 | } | |
1442 | ||
1443 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) { | |
1444 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
1445 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
1446 | schedule_lsp = 1; | |
1447 | } else { | |
1448 | nhlfe_del(nhlfe); | |
1449 | } | |
1450 | } | |
1451 | ||
f2e7f4eb MS |
1452 | frr_each_safe(nhlfe_list, &lsp->backup_nhlfe_list, nhlfe) { |
1453 | /* Skip non-static NHLFEs */ | |
1454 | if (nhlfe->type != type) | |
1455 | continue; | |
1456 | ||
1457 | if (IS_ZEBRA_DEBUG_MPLS) { | |
608a57c0 | 1458 | nhlfe2str(nhlfe, buf, sizeof(buf)); |
f2e7f4eb MS |
1459 | zlog_debug( |
1460 | "Del backup LSP in-label %u type %d nexthop %s flags 0x%x", | |
1461 | lsp->ile.in_label, type, buf, nhlfe->flags); | |
1462 | } | |
1463 | ||
1464 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) { | |
1465 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
1466 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
1467 | schedule_lsp = 1; | |
1468 | } else { | |
1469 | nhlfe_del(nhlfe); | |
1470 | } | |
1471 | } | |
1472 | ||
d62a17ae | 1473 | /* Queue LSP for processing, if needed, else delete. */ |
1474 | if (schedule_lsp) { | |
4a2a5236 MS |
1475 | if (IS_ZEBRA_DEBUG_MPLS) { |
1476 | zlog_debug("Schedule LSP in-label %u flags 0x%x", | |
1477 | lsp->ile.in_label, lsp->flags); | |
1478 | } | |
d62a17ae | 1479 | if (lsp_processq_add(lsp)) |
1480 | return -1; | |
1323491d MS |
1481 | } else { |
1482 | lsp_check_free(lsp_table, &lsp); | |
1483 | } | |
d62a17ae | 1484 | |
1485 | return 0; | |
40c7bdb0 | 1486 | } |
1487 | ||
ce549947 RW |
1488 | /* |
1489 | * Uninstall all static NHLFEs for a particular LSP forwarding entry. | |
1490 | * If no other NHLFEs exist, the entry would be deleted. | |
1491 | */ | |
d62a17ae | 1492 | static int mpls_static_lsp_uninstall_all(struct zebra_vrf *zvrf, |
1493 | mpls_label_t in_label) | |
ce549947 | 1494 | { |
d62a17ae | 1495 | struct hash *lsp_table; |
a7d2146a | 1496 | struct zebra_ile tmp_ile; |
8f74a383 | 1497 | struct zebra_lsp *lsp; |
ce549947 | 1498 | |
d62a17ae | 1499 | /* Lookup table. */ |
1500 | lsp_table = zvrf->lsp_table; | |
1501 | if (!lsp_table) | |
1502 | return -1; | |
ce549947 | 1503 | |
d62a17ae | 1504 | /* If entry is not present, exit. */ |
1505 | tmp_ile.in_label = in_label; | |
1506 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
ee70f629 | 1507 | if (!lsp || (nhlfe_list_first(&lsp->nhlfe_list) == NULL)) |
d62a17ae | 1508 | return 0; |
ce549947 | 1509 | |
d62a17ae | 1510 | return mpls_lsp_uninstall_all(lsp_table, lsp, ZEBRA_LSP_STATIC); |
ce549947 RW |
1511 | } |
1512 | ||
f2595bd5 | 1513 | static json_object *nhlfe_json(struct zebra_nhlfe *nhlfe) |
b78b820d | 1514 | { |
d62a17ae | 1515 | json_object *json_nhlfe = NULL; |
3c0e1622 | 1516 | json_object *json_backups = NULL; |
31f937fb | 1517 | json_object *json_label_stack; |
d62a17ae | 1518 | struct nexthop *nexthop = nhlfe->nexthop; |
3c0e1622 | 1519 | int i; |
b78b820d | 1520 | |
d62a17ae | 1521 | json_nhlfe = json_object_new_object(); |
1522 | json_object_string_add(json_nhlfe, "type", nhlfe_type2str(nhlfe->type)); | |
1523 | json_object_int_add(json_nhlfe, "outLabel", | |
1524 | nexthop->nh_label->label[0]); | |
31f937fb SM |
1525 | |
1526 | json_label_stack = json_object_new_array(); | |
1527 | json_object_object_add(json_nhlfe, "outLabelStack", json_label_stack); | |
1528 | for (i = 0; i < nexthop->nh_label->num_labels; i++) | |
1529 | json_object_array_add( | |
1530 | json_label_stack, | |
1531 | json_object_new_int(nexthop->nh_label->label[i])); | |
1532 | ||
d62a17ae | 1533 | json_object_int_add(json_nhlfe, "distance", nhlfe->distance); |
b78b820d | 1534 | |
d62a17ae | 1535 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) |
1536 | json_object_boolean_true_add(json_nhlfe, "installed"); | |
b78b820d | 1537 | |
d62a17ae | 1538 | switch (nexthop->type) { |
1539 | case NEXTHOP_TYPE_IPV4: | |
1540 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
08edf9c6 DA |
1541 | json_object_string_addf(json_nhlfe, "nexthop", "%pI4", |
1542 | &nexthop->gate.ipv4); | |
d62a17ae | 1543 | break; |
1544 | case NEXTHOP_TYPE_IPV6: | |
1545 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
08edf9c6 DA |
1546 | json_object_string_addf(json_nhlfe, "nexthop", "%pI6", |
1547 | &nexthop->gate.ipv6); | |
d62a17ae | 1548 | |
1549 | if (nexthop->ifindex) | |
4a7371e9 DS |
1550 | json_object_string_add(json_nhlfe, "interface", |
1551 | ifindex2ifname(nexthop->ifindex, | |
1552 | nexthop->vrf_id)); | |
d62a17ae | 1553 | break; |
10cc80ca | 1554 | case NEXTHOP_TYPE_IFINDEX: |
a44e3106 MS |
1555 | if (nexthop->ifindex) |
1556 | json_object_string_add(json_nhlfe, "interface", | |
1557 | ifindex2ifname(nexthop->ifindex, | |
1558 | nexthop->vrf_id)); | |
1559 | break; | |
1560 | case NEXTHOP_TYPE_BLACKHOLE: | |
d62a17ae | 1561 | break; |
1562 | } | |
3c0e1622 MS |
1563 | |
1564 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP)) { | |
1565 | json_backups = json_object_new_array(); | |
1566 | for (i = 0; i < nexthop->backup_num; i++) { | |
1567 | json_object_array_add( | |
1568 | json_backups, | |
1569 | json_object_new_int(nexthop->backup_idx[i])); | |
1570 | } | |
1571 | ||
1572 | json_object_object_add(json_nhlfe, "backupIndex", | |
1573 | json_backups); | |
1574 | } | |
1575 | ||
d62a17ae | 1576 | return json_nhlfe; |
b78b820d | 1577 | } |
1578 | ||
3ab18ff2 | 1579 | /* |
1580 | * Print the NHLFE for a LSP forwarding entry. | |
1581 | */ | |
f2595bd5 | 1582 | static void nhlfe_print(struct zebra_nhlfe *nhlfe, struct vty *vty, |
3c0e1622 | 1583 | const char *indent) |
d62a17ae | 1584 | { |
1585 | struct nexthop *nexthop; | |
a29c2887 | 1586 | char buf[MPLS_LABEL_STRLEN]; |
d62a17ae | 1587 | |
1588 | nexthop = nhlfe->nexthop; | |
1589 | if (!nexthop || !nexthop->nh_label) // unexpected | |
1590 | return; | |
1591 | ||
1592 | vty_out(vty, " type: %s remote label: %s distance: %d\n", | |
1593 | nhlfe_type2str(nhlfe->type), | |
a29c2887 MS |
1594 | mpls_label2str(nexthop->nh_label->num_labels, |
1595 | nexthop->nh_label->label, | |
1596 | buf, sizeof(buf), 0), | |
d62a17ae | 1597 | nhlfe->distance); |
3c0e1622 MS |
1598 | |
1599 | if (indent) | |
1600 | vty_out(vty, "%s", indent); | |
1601 | ||
d62a17ae | 1602 | switch (nexthop->type) { |
1603 | case NEXTHOP_TYPE_IPV4: | |
1604 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
9bcef951 | 1605 | vty_out(vty, " via %pI4", &nexthop->gate.ipv4); |
d62a17ae | 1606 | if (nexthop->ifindex) |
1607 | vty_out(vty, " dev %s", | |
4a7371e9 DS |
1608 | ifindex2ifname(nexthop->ifindex, |
1609 | nexthop->vrf_id)); | |
d62a17ae | 1610 | break; |
1611 | case NEXTHOP_TYPE_IPV6: | |
1612 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1613 | vty_out(vty, " via %s", | |
2896f40e MS |
1614 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, buf, |
1615 | sizeof(buf))); | |
d62a17ae | 1616 | if (nexthop->ifindex) |
1617 | vty_out(vty, " dev %s", | |
4a7371e9 DS |
1618 | ifindex2ifname(nexthop->ifindex, |
1619 | nexthop->vrf_id)); | |
d62a17ae | 1620 | break; |
10cc80ca | 1621 | case NEXTHOP_TYPE_IFINDEX: |
a44e3106 MS |
1622 | if (nexthop->ifindex) |
1623 | vty_out(vty, " dev %s", | |
1624 | ifindex2ifname(nexthop->ifindex, | |
1625 | nexthop->vrf_id)); | |
1626 | break; | |
1627 | case NEXTHOP_TYPE_BLACKHOLE: | |
d62a17ae | 1628 | break; |
1629 | } | |
5e29e1a1 MS |
1630 | vty_out(vty, "%s", |
1631 | CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_IS_BACKUP) ? " (backup)" | |
1632 | : ""); | |
996c9314 LB |
1633 | vty_out(vty, "%s", |
1634 | CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) ? " (installed)" | |
1635 | : ""); | |
d62a17ae | 1636 | vty_out(vty, "\n"); |
3ab18ff2 | 1637 | } |
1638 | ||
1639 | /* | |
1640 | * Print an LSP forwarding entry. | |
1641 | */ | |
8f74a383 | 1642 | static void lsp_print(struct vty *vty, struct zebra_lsp *lsp) |
3ab18ff2 | 1643 | { |
f2595bd5 | 1644 | struct zebra_nhlfe *nhlfe, *backup; |
474aebd9 | 1645 | int i, j; |
3ab18ff2 | 1646 | |
d62a17ae | 1647 | vty_out(vty, "Local label: %u%s\n", lsp->ile.in_label, |
1648 | CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED) ? " (installed)" | |
1649 | : ""); | |
3ab18ff2 | 1650 | |
a29c2887 | 1651 | frr_each(nhlfe_list, &lsp->nhlfe_list, nhlfe) { |
3c0e1622 | 1652 | nhlfe_print(nhlfe, vty, NULL); |
a29c2887 | 1653 | |
3c0e1622 | 1654 | if (nhlfe->nexthop == NULL || |
474aebd9 MS |
1655 | !CHECK_FLAG(nhlfe->nexthop->flags, |
1656 | NEXTHOP_FLAG_HAS_BACKUP)) | |
1657 | continue; | |
a29c2887 | 1658 | |
474aebd9 | 1659 | /* Backup nhlfes: find backups in backup list */ |
a29c2887 | 1660 | |
474aebd9 | 1661 | for (j = 0; j < nhlfe->nexthop->backup_num; j++) { |
a29c2887 | 1662 | i = 0; |
5e29e1a1 | 1663 | backup = NULL; |
a29c2887 | 1664 | frr_each(nhlfe_list, &lsp->backup_nhlfe_list, backup) { |
474aebd9 | 1665 | if (i == nhlfe->nexthop->backup_idx[j]) |
a29c2887 MS |
1666 | break; |
1667 | i++; | |
1668 | } | |
1669 | ||
1670 | if (backup) { | |
1671 | vty_out(vty, " [backup %d]", i); | |
3c0e1622 | 1672 | nhlfe_print(backup, vty, " "); |
a29c2887 MS |
1673 | } |
1674 | } | |
1675 | } | |
3ab18ff2 | 1676 | } |
1677 | ||
1678 | /* | |
b78b820d | 1679 | * JSON objects for an LSP forwarding entry. |
3ab18ff2 | 1680 | */ |
8f74a383 | 1681 | static json_object *lsp_json(struct zebra_lsp *lsp) |
3ab18ff2 | 1682 | { |
f2595bd5 | 1683 | struct zebra_nhlfe *nhlfe = NULL; |
d62a17ae | 1684 | json_object *json = json_object_new_object(); |
1685 | json_object *json_nhlfe_list = json_object_new_array(); | |
3ab18ff2 | 1686 | |
d62a17ae | 1687 | json_object_int_add(json, "inLabel", lsp->ile.in_label); |
b78b820d | 1688 | |
d62a17ae | 1689 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) |
1690 | json_object_boolean_true_add(json, "installed"); | |
3ab18ff2 | 1691 | |
ee70f629 | 1692 | frr_each(nhlfe_list, &lsp->nhlfe_list, nhlfe) |
d62a17ae | 1693 | json_object_array_add(json_nhlfe_list, nhlfe_json(nhlfe)); |
b78b820d | 1694 | |
d62a17ae | 1695 | json_object_object_add(json, "nexthops", json_nhlfe_list); |
3c0e1622 MS |
1696 | json_nhlfe_list = NULL; |
1697 | ||
1698 | ||
1699 | frr_each(nhlfe_list, &lsp->backup_nhlfe_list, nhlfe) { | |
1700 | if (json_nhlfe_list == NULL) | |
1701 | json_nhlfe_list = json_object_new_array(); | |
1702 | ||
1703 | json_object_array_add(json_nhlfe_list, nhlfe_json(nhlfe)); | |
1704 | } | |
1705 | ||
1706 | if (json_nhlfe_list) | |
1707 | json_object_object_add(json, "backupNexthops", json_nhlfe_list); | |
1708 | ||
d62a17ae | 1709 | return json; |
b78b820d | 1710 | } |
1711 | ||
1712 | ||
1713 | /* Return a sorted linked list of the hash contents */ | |
d62a17ae | 1714 | static struct list *hash_get_sorted_list(struct hash *hash, void *cmp) |
b78b820d | 1715 | { |
d62a17ae | 1716 | unsigned int i; |
e3b78da8 | 1717 | struct hash_bucket *hb; |
d62a17ae | 1718 | struct list *sorted_list = list_new(); |
b78b820d | 1719 | |
d62a17ae | 1720 | sorted_list->cmp = (int (*)(void *, void *))cmp; |
b78b820d | 1721 | |
d62a17ae | 1722 | for (i = 0; i < hash->size; i++) |
1723 | for (hb = hash->index[i]; hb; hb = hb->next) | |
1724 | listnode_add_sort(sorted_list, hb->data); | |
b78b820d | 1725 | |
d62a17ae | 1726 | return sorted_list; |
3ab18ff2 | 1727 | } |
1728 | ||
7758e3f3 | 1729 | /* |
b78b820d | 1730 | * Compare two LSPs based on their label values. |
7758e3f3 | 1731 | */ |
8f74a383 | 1732 | static int lsp_cmp(const struct zebra_lsp *lsp1, const struct zebra_lsp *lsp2) |
7758e3f3 | 1733 | { |
d62a17ae | 1734 | if (lsp1->ile.in_label < lsp2->ile.in_label) |
1735 | return -1; | |
7758e3f3 | 1736 | |
d62a17ae | 1737 | if (lsp1->ile.in_label > lsp2->ile.in_label) |
1738 | return 1; | |
7758e3f3 | 1739 | |
d62a17ae | 1740 | return 0; |
7758e3f3 | 1741 | } |
1742 | ||
40c7bdb0 | 1743 | /* |
1744 | * Initialize work queue for processing changed LSPs. | |
1745 | */ | |
2561d12e | 1746 | static int mpls_processq_init(void) |
40c7bdb0 | 1747 | { |
e2353ec2 DS |
1748 | zrouter.lsp_process_q = work_queue_new(zrouter.master, "LSP processing"); |
1749 | if (!zrouter.lsp_process_q) { | |
e914ccbe | 1750 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 1751 | "%s: could not initialise work queue!", __func__); |
d62a17ae | 1752 | return -1; |
1753 | } | |
40c7bdb0 | 1754 | |
e2353ec2 DS |
1755 | zrouter.lsp_process_q->spec.workfunc = &lsp_process; |
1756 | zrouter.lsp_process_q->spec.del_item_data = &lsp_processq_del; | |
1757 | zrouter.lsp_process_q->spec.errorfunc = NULL; | |
1758 | zrouter.lsp_process_q->spec.completion_func = &lsp_processq_complete; | |
1759 | zrouter.lsp_process_q->spec.max_retries = 0; | |
1760 | zrouter.lsp_process_q->spec.hold = 10; | |
33c32282 | 1761 | |
d62a17ae | 1762 | return 0; |
40c7bdb0 | 1763 | } |
1764 | ||
7758e3f3 | 1765 | |
d37f4d6c MS |
1766 | /* |
1767 | * Process LSP update results from zebra dataplane. | |
1768 | */ | |
1769 | void zebra_mpls_lsp_dplane_result(struct zebra_dplane_ctx *ctx) | |
1770 | { | |
1771 | struct zebra_vrf *zvrf; | |
31f937fb | 1772 | mpls_label_t label; |
a7d2146a | 1773 | struct zebra_ile tmp_ile; |
d37f4d6c | 1774 | struct hash *lsp_table; |
8f74a383 | 1775 | struct zebra_lsp *lsp; |
f2595bd5 | 1776 | struct zebra_nhlfe *nhlfe; |
d37f4d6c MS |
1777 | struct nexthop *nexthop; |
1778 | enum dplane_op_e op; | |
8841f96e | 1779 | enum zebra_dplane_result status; |
31f937fb | 1780 | enum zebra_sr_policy_update_label_mode update_mode; |
d37f4d6c MS |
1781 | |
1782 | op = dplane_ctx_get_op(ctx); | |
1783 | status = dplane_ctx_get_status(ctx); | |
1784 | ||
1785 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) | |
1786 | zlog_debug("LSP dplane ctx %p, op %s, in-label %u, result %s", | |
1787 | ctx, dplane_op2str(op), | |
1788 | dplane_ctx_get_in_label(ctx), | |
1789 | dplane_res2str(status)); | |
1790 | ||
31f937fb SM |
1791 | label = dplane_ctx_get_in_label(ctx); |
1792 | ||
d37f4d6c MS |
1793 | switch (op) { |
1794 | case DPLANE_OP_LSP_INSTALL: | |
1795 | case DPLANE_OP_LSP_UPDATE: | |
1796 | /* Look for zebra LSP object */ | |
1797 | zvrf = vrf_info_lookup(VRF_DEFAULT); | |
1798 | if (zvrf == NULL) | |
1799 | break; | |
1800 | ||
1801 | lsp_table = zvrf->lsp_table; | |
1802 | ||
31f937fb | 1803 | tmp_ile.in_label = label; |
d37f4d6c MS |
1804 | lsp = hash_lookup(lsp_table, &tmp_ile); |
1805 | if (lsp == NULL) { | |
1806 | if (IS_ZEBRA_DEBUG_DPLANE) | |
1807 | zlog_debug("LSP ctx %p: in-label %u not found", | |
1808 | ctx, dplane_ctx_get_in_label(ctx)); | |
1809 | break; | |
1810 | } | |
1811 | ||
1812 | /* TODO -- Confirm that this result is still 'current' */ | |
1813 | ||
c3753405 | 1814 | if (status != ZEBRA_DPLANE_REQUEST_SUCCESS) { |
d37f4d6c MS |
1815 | UNSET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); |
1816 | clear_nhlfe_installed(lsp); | |
1817 | flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE, | |
1818 | "LSP Install Failure: in-label %u", | |
1819 | lsp->ile.in_label); | |
c3753405 MS |
1820 | break; |
1821 | } | |
1822 | ||
1823 | /* Update zebra object */ | |
1824 | SET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); | |
1825 | frr_each(nhlfe_list, &lsp->nhlfe_list, nhlfe) { | |
1826 | nexthop = nhlfe->nexthop; | |
1827 | if (!nexthop) | |
1828 | continue; | |
1829 | ||
1830 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) && | |
1831 | CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) { | |
1832 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1833 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1834 | } | |
d37f4d6c MS |
1835 | } |
1836 | ||
31f937fb SM |
1837 | update_mode = (op == DPLANE_OP_LSP_INSTALL) |
1838 | ? ZEBRA_SR_POLICY_LABEL_CREATED | |
1839 | : ZEBRA_SR_POLICY_LABEL_UPDATED; | |
1840 | zebra_sr_policy_label_update(label, update_mode); | |
d37f4d6c MS |
1841 | break; |
1842 | ||
1843 | case DPLANE_OP_LSP_DELETE: | |
31f937fb | 1844 | if (status != ZEBRA_DPLANE_REQUEST_SUCCESS) { |
3fd385c6 DS |
1845 | flog_warn(EC_ZEBRA_LSP_DELETE_FAILURE, |
1846 | "LSP Deletion Failure: in-label %u", | |
1847 | dplane_ctx_get_in_label(ctx)); | |
31f937fb SM |
1848 | break; |
1849 | } | |
1850 | zebra_sr_policy_label_update(label, | |
1851 | ZEBRA_SR_POLICY_LABEL_REMOVED); | |
d37f4d6c MS |
1852 | break; |
1853 | ||
1854 | default: | |
1855 | break; | |
1856 | ||
1857 | } /* Switch */ | |
1858 | ||
1859 | dplane_ctx_fini(&ctx); | |
1860 | } | |
1861 | ||
104e3ad9 | 1862 | /* |
68110c42 MS |
1863 | * Process LSP installation info from two sets of nhlfes: a set from |
1864 | * a dplane notification, and a set from the zebra LSP object. Update | |
1865 | * counters of installed nexthops, and return whether the LSP has changed. | |
104e3ad9 | 1866 | */ |
68110c42 MS |
1867 | static bool compare_notif_nhlfes(const struct nhlfe_list_head *ctx_head, |
1868 | struct nhlfe_list_head *nhlfe_head, | |
1869 | int *start_counter, int *end_counter) | |
104e3ad9 | 1870 | { |
f2595bd5 DS |
1871 | struct zebra_nhlfe *nhlfe; |
1872 | const struct zebra_nhlfe *ctx_nhlfe; | |
104e3ad9 MS |
1873 | struct nexthop *nexthop; |
1874 | const struct nexthop *ctx_nexthop; | |
68110c42 | 1875 | int start_count = 0, end_count = 0; |
188a00e0 | 1876 | bool changed_p = false; |
104e3ad9 MS |
1877 | bool is_debug = (IS_ZEBRA_DEBUG_DPLANE | IS_ZEBRA_DEBUG_MPLS); |
1878 | ||
68110c42 | 1879 | frr_each_safe(nhlfe_list, nhlfe_head, nhlfe) { |
104e3ad9 MS |
1880 | char buf[NEXTHOP_STRLEN]; |
1881 | ||
1882 | nexthop = nhlfe->nexthop; | |
1883 | if (!nexthop) | |
1884 | continue; | |
1885 | ||
1886 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1887 | start_count++; | |
1888 | ||
68110c42 | 1889 | ctx_nhlfe = NULL; |
104e3ad9 | 1890 | ctx_nexthop = NULL; |
68110c42 | 1891 | frr_each(nhlfe_list_const, ctx_head, ctx_nhlfe) { |
104e3ad9 MS |
1892 | ctx_nexthop = ctx_nhlfe->nexthop; |
1893 | if (!ctx_nexthop) | |
1894 | continue; | |
1895 | ||
1896 | if ((ctx_nexthop->type == nexthop->type) && | |
1897 | nexthop_same(ctx_nexthop, nexthop)) { | |
1898 | /* Matched */ | |
1899 | break; | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | if (is_debug) | |
1904 | nexthop2str(nexthop, buf, sizeof(buf)); | |
1905 | ||
1906 | if (ctx_nhlfe && ctx_nexthop) { | |
1907 | if (is_debug) { | |
1908 | const char *tstr = ""; | |
1909 | ||
1910 | if (!CHECK_FLAG(ctx_nhlfe->flags, | |
1911 | NHLFE_FLAG_INSTALLED)) | |
1912 | tstr = "not "; | |
1913 | ||
1914 | zlog_debug("LSP dplane notif: matched nh %s (%sinstalled)", | |
1915 | buf, tstr); | |
1916 | } | |
1917 | ||
188a00e0 | 1918 | /* Test zebra nhlfe install state */ |
104e3ad9 MS |
1919 | if (CHECK_FLAG(ctx_nhlfe->flags, |
1920 | NHLFE_FLAG_INSTALLED)) { | |
188a00e0 MS |
1921 | |
1922 | if (!CHECK_FLAG(nhlfe->flags, | |
1923 | NHLFE_FLAG_INSTALLED)) | |
1924 | changed_p = true; | |
104e3ad9 MS |
1925 | |
1926 | /* Update counter */ | |
1927 | end_count++; | |
188a00e0 MS |
1928 | } else { |
1929 | ||
1930 | if (CHECK_FLAG(nhlfe->flags, | |
1931 | NHLFE_FLAG_INSTALLED)) | |
1932 | changed_p = true; | |
1933 | } | |
1934 | ||
1935 | } else { | |
1936 | /* Not mentioned in lfib set -> uninstalled */ | |
1937 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) || | |
1938 | CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE) || | |
1939 | CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
1940 | changed_p = true; | |
1941 | } | |
1942 | ||
1943 | if (is_debug) | |
1944 | zlog_debug("LSP dplane notif: no match, nh %s", | |
1945 | buf); | |
1946 | } | |
1947 | } | |
1948 | ||
68110c42 MS |
1949 | if (start_counter) |
1950 | *start_counter += start_count; | |
1951 | if (end_counter) | |
1952 | *end_counter += end_count; | |
188a00e0 | 1953 | |
68110c42 MS |
1954 | return changed_p; |
1955 | } | |
188a00e0 | 1956 | |
68110c42 MS |
1957 | /* |
1958 | * Update an lsp nhlfe list from a dplane context, typically an async | |
1959 | * notification context. Update the LSP list to match the installed | |
1960 | * status from the context's list. | |
1961 | */ | |
1962 | static int update_nhlfes_from_ctx(struct nhlfe_list_head *nhlfe_head, | |
1963 | const struct nhlfe_list_head *ctx_head) | |
1964 | { | |
1965 | int ret = 0; | |
f2595bd5 DS |
1966 | struct zebra_nhlfe *nhlfe; |
1967 | const struct zebra_nhlfe *ctx_nhlfe; | |
68110c42 MS |
1968 | struct nexthop *nexthop; |
1969 | const struct nexthop *ctx_nexthop; | |
1970 | bool is_debug = (IS_ZEBRA_DEBUG_DPLANE | IS_ZEBRA_DEBUG_MPLS); | |
1971 | ||
1972 | frr_each_safe(nhlfe_list, nhlfe_head, nhlfe) { | |
188a00e0 MS |
1973 | char buf[NEXTHOP_STRLEN]; |
1974 | ||
1975 | nexthop = nhlfe->nexthop; | |
1976 | if (!nexthop) | |
1977 | continue; | |
1978 | ||
c3753405 | 1979 | ctx_nhlfe = NULL; |
188a00e0 | 1980 | ctx_nexthop = NULL; |
c3753405 | 1981 | frr_each(nhlfe_list_const, ctx_head, ctx_nhlfe) { |
188a00e0 MS |
1982 | ctx_nexthop = ctx_nhlfe->nexthop; |
1983 | if (!ctx_nexthop) | |
1984 | continue; | |
1985 | ||
1986 | if ((ctx_nexthop->type == nexthop->type) && | |
1987 | nexthop_same(ctx_nexthop, nexthop)) { | |
1988 | /* Matched */ | |
1989 | break; | |
1990 | } | |
1991 | } | |
1992 | ||
1993 | if (is_debug) | |
1994 | nexthop2str(nexthop, buf, sizeof(buf)); | |
1995 | ||
1996 | if (ctx_nhlfe && ctx_nexthop) { | |
1997 | ||
1998 | /* Bring zebra nhlfe install state into sync */ | |
1999 | if (CHECK_FLAG(ctx_nhlfe->flags, | |
2000 | NHLFE_FLAG_INSTALLED)) { | |
c3753405 MS |
2001 | if (is_debug) |
2002 | zlog_debug("%s: matched lsp nhlfe %s (installed)", | |
2003 | __func__, buf); | |
188a00e0 MS |
2004 | |
2005 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
00a9b150 | 2006 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED); |
188a00e0 MS |
2007 | |
2008 | } else { | |
c3753405 MS |
2009 | if (is_debug) |
2010 | zlog_debug("%s: matched lsp nhlfe %s (not installed)", | |
2011 | __func__, buf); | |
188a00e0 | 2012 | |
104e3ad9 | 2013 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); |
00a9b150 | 2014 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED); |
188a00e0 | 2015 | } |
104e3ad9 MS |
2016 | |
2017 | if (CHECK_FLAG(ctx_nhlfe->nexthop->flags, | |
188a00e0 MS |
2018 | NEXTHOP_FLAG_FIB)) { |
2019 | SET_FLAG(nhlfe->nexthop->flags, | |
2020 | NEXTHOP_FLAG_ACTIVE); | |
104e3ad9 MS |
2021 | SET_FLAG(nhlfe->nexthop->flags, |
2022 | NEXTHOP_FLAG_FIB); | |
188a00e0 MS |
2023 | } else { |
2024 | UNSET_FLAG(nhlfe->nexthop->flags, | |
2025 | NEXTHOP_FLAG_ACTIVE); | |
104e3ad9 MS |
2026 | UNSET_FLAG(nhlfe->nexthop->flags, |
2027 | NEXTHOP_FLAG_FIB); | |
188a00e0 MS |
2028 | } |
2029 | ||
104e3ad9 MS |
2030 | } else { |
2031 | /* Not mentioned in lfib set -> uninstalled */ | |
c3753405 MS |
2032 | if (is_debug) |
2033 | zlog_debug("%s: no match for lsp nhlfe %s", | |
2034 | __func__, buf); | |
104e3ad9 | 2035 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); |
00a9b150 | 2036 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED); |
104e3ad9 | 2037 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
188a00e0 | 2038 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
104e3ad9 MS |
2039 | } |
2040 | } | |
2041 | ||
68110c42 MS |
2042 | return ret; |
2043 | } | |
2044 | ||
2045 | /* | |
2046 | * Process async dplane notifications. | |
2047 | */ | |
2048 | void zebra_mpls_process_dplane_notify(struct zebra_dplane_ctx *ctx) | |
2049 | { | |
2050 | struct zebra_vrf *zvrf; | |
a7d2146a | 2051 | struct zebra_ile tmp_ile; |
68110c42 | 2052 | struct hash *lsp_table; |
8f74a383 | 2053 | struct zebra_lsp *lsp; |
68110c42 MS |
2054 | const struct nhlfe_list_head *ctx_list; |
2055 | int start_count = 0, end_count = 0; /* Installed counts */ | |
2056 | bool changed_p = false; | |
2057 | bool is_debug = (IS_ZEBRA_DEBUG_DPLANE | IS_ZEBRA_DEBUG_MPLS); | |
8283551d | 2058 | enum zebra_sr_policy_update_label_mode update_mode; |
68110c42 MS |
2059 | |
2060 | if (is_debug) | |
2061 | zlog_debug("LSP dplane notif, in-label %u", | |
2062 | dplane_ctx_get_in_label(ctx)); | |
2063 | ||
2064 | /* Look for zebra LSP object */ | |
2065 | zvrf = vrf_info_lookup(VRF_DEFAULT); | |
2066 | if (zvrf == NULL) | |
2067 | goto done; | |
2068 | ||
2069 | lsp_table = zvrf->lsp_table; | |
2070 | ||
2071 | tmp_ile.in_label = dplane_ctx_get_in_label(ctx); | |
2072 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
2073 | if (lsp == NULL) { | |
2074 | if (is_debug) | |
2075 | zlog_debug("dplane LSP notif: in-label %u not found", | |
2076 | dplane_ctx_get_in_label(ctx)); | |
2077 | goto done; | |
2078 | } | |
2079 | ||
2080 | /* | |
2081 | * The dataplane/forwarding plane is notifying zebra about the state | |
2082 | * of the nexthops associated with this LSP. First, we take a | |
2083 | * pre-scan pass to determine whether the LSP has transitioned | |
2084 | * from installed -> uninstalled. In that case, we need to have | |
2085 | * the existing state of the LSP objects available before making | |
2086 | * any changes. | |
2087 | */ | |
2088 | ctx_list = dplane_ctx_get_nhlfe_list(ctx); | |
2089 | ||
2090 | changed_p = compare_notif_nhlfes(ctx_list, &lsp->nhlfe_list, | |
2091 | &start_count, &end_count); | |
2092 | ||
2093 | if (is_debug) | |
2094 | zlog_debug("LSP dplane notif: lfib start_count %d, end_count %d%s", | |
2095 | start_count, end_count, | |
2096 | changed_p ? ", changed" : ""); | |
2097 | ||
2098 | ctx_list = dplane_ctx_get_backup_nhlfe_list(ctx); | |
2099 | ||
2100 | if (compare_notif_nhlfes(ctx_list, &lsp->backup_nhlfe_list, | |
2101 | &start_count, &end_count)) | |
2102 | /* Avoid accidentally setting back to 'false' */ | |
2103 | changed_p = true; | |
2104 | ||
2105 | if (is_debug) | |
2106 | zlog_debug("LSP dplane notif: lfib backups, start_count %d, end_count %d%s", | |
2107 | start_count, end_count, | |
2108 | changed_p ? ", changed" : ""); | |
2109 | ||
2110 | /* | |
2111 | * Has the LSP become uninstalled? We need the existing state of the | |
2112 | * nexthops/nhlfes at this point so we know what to delete. | |
2113 | */ | |
2114 | if (start_count > 0 && end_count == 0) { | |
2115 | /* Inform other lfibs */ | |
2116 | dplane_lsp_notif_update(lsp, DPLANE_OP_LSP_DELETE, ctx); | |
2117 | } | |
2118 | ||
2119 | /* | |
2120 | * Now we take a second pass and bring the zebra | |
2121 | * nexthop state into sync with the forwarding-plane state. | |
2122 | */ | |
2123 | ctx_list = dplane_ctx_get_nhlfe_list(ctx); | |
2124 | update_nhlfes_from_ctx(&lsp->nhlfe_list, ctx_list); | |
2125 | ||
2126 | ctx_list = dplane_ctx_get_backup_nhlfe_list(ctx); | |
2127 | update_nhlfes_from_ctx(&lsp->backup_nhlfe_list, ctx_list); | |
2128 | ||
188a00e0 | 2129 | if (end_count > 0) { |
104e3ad9 | 2130 | SET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); |
188a00e0 | 2131 | |
8283551d MS |
2132 | /* SR-TE update too */ |
2133 | if (start_count == 0) | |
2134 | update_mode = ZEBRA_SR_POLICY_LABEL_CREATED; | |
2135 | else | |
2136 | update_mode = ZEBRA_SR_POLICY_LABEL_UPDATED; | |
2137 | zebra_sr_policy_label_update(lsp->ile.in_label, update_mode); | |
2138 | ||
188a00e0 MS |
2139 | if (changed_p) |
2140 | dplane_lsp_notif_update(lsp, DPLANE_OP_LSP_UPDATE, ctx); | |
2141 | ||
2142 | } else { | |
8283551d MS |
2143 | /* SR-TE update too */ |
2144 | zebra_sr_policy_label_update(lsp->ile.in_label, | |
2145 | ZEBRA_SR_POLICY_LABEL_REMOVED); | |
2146 | ||
104e3ad9 MS |
2147 | UNSET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); |
2148 | clear_nhlfe_installed(lsp); | |
2149 | } | |
2150 | ||
2151 | done: | |
2152 | dplane_ctx_fini(&ctx); | |
2153 | } | |
2154 | ||
a64448ba DS |
2155 | /* |
2156 | * Install dynamic LSP entry. | |
2157 | */ | |
d62a17ae | 2158 | int zebra_mpls_lsp_install(struct zebra_vrf *zvrf, struct route_node *rn, |
2159 | struct route_entry *re) | |
a64448ba | 2160 | { |
d62a17ae | 2161 | struct route_table *table; |
60e36561 | 2162 | struct zebra_fec *fec; |
a64448ba | 2163 | |
d62a17ae | 2164 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(&rn->p))]; |
2165 | if (!table) | |
2166 | return -1; | |
a64448ba | 2167 | |
d62a17ae | 2168 | /* See if there is a configured label binding for this FEC. */ |
2169 | fec = fec_find(table, &rn->p); | |
2170 | if (!fec || fec->label == MPLS_INVALID_LABEL) | |
2171 | return 0; | |
a64448ba | 2172 | |
d62a17ae | 2173 | /* We cannot install a label forwarding entry if local label is the |
2174 | * implicit-null label. | |
2175 | */ | |
70e98a7f | 2176 | if (fec->label == MPLS_LABEL_IMPLICIT_NULL) |
d62a17ae | 2177 | return 0; |
a64448ba | 2178 | |
d62a17ae | 2179 | if (lsp_install(zvrf, fec->label, rn, re)) |
2180 | return -1; | |
a64448ba | 2181 | |
d62a17ae | 2182 | return 0; |
a64448ba DS |
2183 | } |
2184 | ||
2185 | /* | |
2186 | * Uninstall dynamic LSP entry, if any. | |
2187 | */ | |
d62a17ae | 2188 | int zebra_mpls_lsp_uninstall(struct zebra_vrf *zvrf, struct route_node *rn, |
2189 | struct route_entry *re) | |
a64448ba | 2190 | { |
d62a17ae | 2191 | struct route_table *table; |
60e36561 | 2192 | struct zebra_fec *fec; |
a64448ba | 2193 | |
d62a17ae | 2194 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(&rn->p))]; |
2195 | if (!table) | |
2196 | return -1; | |
a64448ba | 2197 | |
d62a17ae | 2198 | /* See if there is a configured label binding for this FEC. */ |
2199 | fec = fec_find(table, &rn->p); | |
2200 | if (!fec || fec->label == MPLS_INVALID_LABEL) | |
2201 | return 0; | |
a64448ba | 2202 | |
d62a17ae | 2203 | /* Uninstall always removes all dynamic NHLFEs. */ |
2204 | return lsp_uninstall(zvrf, fec->label); | |
a64448ba DS |
2205 | } |
2206 | ||
d4cb23d7 | 2207 | /* |
cd4bb96f MS |
2208 | * Add an NHLFE to an LSP, return the newly-added object. This path only changes |
2209 | * the LSP object - nothing is scheduled for processing, for example. | |
d4cb23d7 | 2210 | */ |
f2595bd5 | 2211 | struct zebra_nhlfe * |
8f74a383 | 2212 | zebra_mpls_lsp_add_nhlfe(struct zebra_lsp *lsp, enum lsp_types_t lsp_type, |
f2595bd5 DS |
2213 | enum nexthop_types_t gtype, const union g_addr *gate, |
2214 | ifindex_t ifindex, uint8_t num_labels, | |
2215 | const mpls_label_t *out_labels) | |
d4cb23d7 MS |
2216 | { |
2217 | /* Just a public pass-through to the internal implementation */ | |
5065db0a | 2218 | return nhlfe_add(lsp, lsp_type, gtype, gate, ifindex, num_labels, |
cc1b9746 | 2219 | out_labels, false /*backup*/); |
d4cb23d7 MS |
2220 | } |
2221 | ||
cd4bb96f MS |
2222 | /* |
2223 | * Add a backup NHLFE to an LSP, return the newly-added object. | |
2224 | * This path only changes the LSP object - nothing is scheduled for | |
2225 | * processing, for example. | |
2226 | */ | |
f2595bd5 | 2227 | struct zebra_nhlfe *zebra_mpls_lsp_add_backup_nhlfe( |
8f74a383 DS |
2228 | struct zebra_lsp *lsp, enum lsp_types_t lsp_type, |
2229 | enum nexthop_types_t gtype, const union g_addr *gate, ifindex_t ifindex, | |
2230 | uint8_t num_labels, const mpls_label_t *out_labels) | |
cd4bb96f MS |
2231 | { |
2232 | /* Just a public pass-through to the internal implementation */ | |
cc1b9746 MS |
2233 | return nhlfe_add(lsp, lsp_type, gtype, gate, ifindex, num_labels, |
2234 | out_labels, true); | |
cd4bb96f MS |
2235 | } |
2236 | ||
2237 | /* | |
2238 | * Add an NHLFE to an LSP based on a nexthop; return the newly-added object | |
2239 | */ | |
8f74a383 | 2240 | struct zebra_nhlfe *zebra_mpls_lsp_add_nh(struct zebra_lsp *lsp, |
f2595bd5 DS |
2241 | enum lsp_types_t lsp_type, |
2242 | const struct nexthop *nh) | |
cd4bb96f | 2243 | { |
f2595bd5 | 2244 | struct zebra_nhlfe *nhlfe; |
cd4bb96f MS |
2245 | |
2246 | if (nh->nh_label == NULL || nh->nh_label->num_labels == 0) | |
2247 | return NULL; | |
2248 | ||
2249 | nhlfe = nhlfe_add(lsp, lsp_type, nh->type, &nh->gate, nh->ifindex, | |
cc1b9746 MS |
2250 | nh->nh_label->num_labels, nh->nh_label->label, |
2251 | false /*backup*/); | |
cd4bb96f MS |
2252 | |
2253 | return nhlfe; | |
2254 | } | |
2255 | ||
2256 | /* | |
2257 | * Add a backup NHLFE to an LSP based on a nexthop; | |
2258 | * return the newly-added object. | |
2259 | */ | |
8f74a383 | 2260 | struct zebra_nhlfe *zebra_mpls_lsp_add_backup_nh(struct zebra_lsp *lsp, |
f2595bd5 DS |
2261 | enum lsp_types_t lsp_type, |
2262 | const struct nexthop *nh) | |
cd4bb96f | 2263 | { |
f2595bd5 | 2264 | struct zebra_nhlfe *nhlfe; |
cd4bb96f MS |
2265 | |
2266 | if (nh->nh_label == NULL || nh->nh_label->num_labels == 0) | |
2267 | return NULL; | |
2268 | ||
cc1b9746 | 2269 | nhlfe = nhlfe_add(lsp, lsp_type, nh->type, &nh->gate, |
cd4bb96f | 2270 | nh->ifindex, nh->nh_label->num_labels, |
cc1b9746 | 2271 | nh->nh_label->label, true); |
cd4bb96f MS |
2272 | |
2273 | return nhlfe; | |
2274 | } | |
2275 | ||
d4cb23d7 MS |
2276 | /* |
2277 | * Free an allocated NHLFE | |
2278 | */ | |
f2595bd5 | 2279 | void zebra_mpls_nhlfe_free(struct zebra_nhlfe *nhlfe) |
d4cb23d7 MS |
2280 | { |
2281 | /* Just a pass-through to the internal implementation */ | |
cd4bb96f | 2282 | nhlfe_free(nhlfe); |
d4cb23d7 MS |
2283 | } |
2284 | ||
5aba114a DS |
2285 | /* |
2286 | * Registration from a client for the label binding for a FEC. If a binding | |
2287 | * already exists, it is informed to the client. | |
28d58fd7 | 2288 | * NOTE: If there is a manually configured label binding, that is used. |
9bedbb1e | 2289 | * Otherwise, if a label index is specified, it means we have to allocate the |
28d58fd7 | 2290 | * label from a locally configured label block (SRGB), if one exists and index |
57592a53 AD |
2291 | * is acceptable. If no label index then just register the specified label. |
2292 | * NOTE2: Either label or label_index is expected to be set to MPLS_INVALID_* | |
2293 | * by the calling function. Register requests with both will be rejected. | |
5aba114a | 2294 | */ |
d62a17ae | 2295 | int zebra_mpls_fec_register(struct zebra_vrf *zvrf, struct prefix *p, |
57592a53 AD |
2296 | uint32_t label, uint32_t label_index, |
2297 | struct zserv *client) | |
d62a17ae | 2298 | { |
2299 | struct route_table *table; | |
60e36561 | 2300 | struct zebra_fec *fec; |
57592a53 AD |
2301 | bool new_client; |
2302 | bool label_change = false; | |
d7c0a89a | 2303 | uint32_t old_label; |
57592a53 AD |
2304 | bool have_label_index = (label_index != MPLS_INVALID_LABEL_INDEX); |
2305 | bool is_configured_fec = false; /* indicate statically configured FEC */ | |
d62a17ae | 2306 | |
2307 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
2308 | if (!table) | |
2309 | return -1; | |
2310 | ||
57592a53 AD |
2311 | if (label != MPLS_INVALID_LABEL && have_label_index) { |
2312 | flog_err( | |
2313 | EC_ZEBRA_FEC_LABEL_INDEX_LABEL_CONFLICT, | |
b467b4b4 DS |
2314 | "Rejecting FEC register for %pFX with both label %u and Label Index %u specified, client %s", |
2315 | p, label, label_index, | |
57592a53 AD |
2316 | zebra_route_string(client->proto)); |
2317 | return -1; | |
2318 | } | |
2319 | ||
d62a17ae | 2320 | /* Locate FEC */ |
2321 | fec = fec_find(table, p); | |
2322 | if (!fec) { | |
57592a53 | 2323 | fec = fec_add(table, p, label, 0, label_index); |
d62a17ae | 2324 | if (!fec) { |
af4c2728 | 2325 | flog_err( |
e914ccbe | 2326 | EC_ZEBRA_FEC_ADD_FAILED, |
b467b4b4 DS |
2327 | "Failed to add FEC %pFX upon register, client %s", |
2328 | p, zebra_route_string(client->proto)); | |
d62a17ae | 2329 | return -1; |
2330 | } | |
2331 | ||
2332 | old_label = MPLS_INVALID_LABEL; | |
57592a53 | 2333 | new_client = true; |
d62a17ae | 2334 | } else { |
57592a53 AD |
2335 | /* Check if the FEC has been statically defined in the config */ |
2336 | is_configured_fec = fec->flags & FEC_FLAG_CONFIGURED; | |
d62a17ae | 2337 | /* Client may register same FEC with different label index. */ |
2338 | new_client = | |
2339 | (listnode_lookup(fec->client_list, client) == NULL); | |
57592a53 AD |
2340 | if (!new_client && fec->label_index == label_index |
2341 | && fec->label == label) | |
d62a17ae | 2342 | /* Duplicate register */ |
2343 | return 0; | |
2344 | ||
57592a53 | 2345 | /* Save current label, update the FEC */ |
d62a17ae | 2346 | old_label = fec->label; |
2347 | fec->label_index = label_index; | |
2348 | } | |
2349 | ||
2350 | if (new_client) | |
2351 | listnode_add(fec->client_list, client); | |
2352 | ||
2353 | if (IS_ZEBRA_DEBUG_MPLS) | |
b467b4b4 | 2354 | zlog_debug("FEC %pFX label%s %u %s by client %s%s", p, |
57592a53 AD |
2355 | have_label_index ? " index" : "", |
2356 | have_label_index ? label_index : label, | |
2357 | new_client ? "registered" : "updated", | |
2358 | zebra_route_string(client->proto), | |
2359 | is_configured_fec | |
2360 | ? ", but using statically configured label" | |
2361 | : ""); | |
2362 | ||
2363 | /* If not a statically configured FEC, derive the local label | |
2364 | * from label index or use the provided label | |
d62a17ae | 2365 | */ |
57592a53 AD |
2366 | if (!is_configured_fec) { |
2367 | if (have_label_index) | |
2368 | fec_derive_label_from_index(zvrf, fec); | |
2369 | else | |
2370 | fec->label = label; | |
d62a17ae | 2371 | |
2372 | /* If no label change, exit. */ | |
2373 | if (fec->label == old_label) | |
2374 | return 0; | |
2375 | ||
57592a53 | 2376 | label_change = true; |
d62a17ae | 2377 | } |
2378 | ||
2379 | /* If new client or label change, update client and install or uninstall | |
2380 | * label forwarding entry as needed. | |
2381 | */ | |
2382 | /* Inform client of label, if needed. */ | |
2383 | if ((new_client && fec->label != MPLS_INVALID_LABEL) || label_change) { | |
2384 | if (IS_ZEBRA_DEBUG_MPLS) | |
2385 | zlog_debug("Update client label %u", fec->label); | |
2386 | fec_send(fec, client); | |
2387 | } | |
2388 | ||
2389 | if (new_client || label_change) | |
2390 | return fec_change_update_lsp(zvrf, fec, old_label); | |
2391 | ||
2392 | return 0; | |
5aba114a DS |
2393 | } |
2394 | ||
2395 | /* | |
2396 | * Deregistration from a client for the label binding for a FEC. The FEC | |
2397 | * itself is deleted if no other registered clients exist and there is no | |
2398 | * label bound to the FEC. | |
2399 | */ | |
d62a17ae | 2400 | int zebra_mpls_fec_unregister(struct zebra_vrf *zvrf, struct prefix *p, |
2401 | struct zserv *client) | |
5aba114a | 2402 | { |
d62a17ae | 2403 | struct route_table *table; |
60e36561 | 2404 | struct zebra_fec *fec; |
5aba114a | 2405 | |
d62a17ae | 2406 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; |
2407 | if (!table) | |
2408 | return -1; | |
5aba114a | 2409 | |
d62a17ae | 2410 | fec = fec_find(table, p); |
2411 | if (!fec) { | |
e914ccbe | 2412 | flog_err(EC_ZEBRA_FEC_RM_FAILED, |
2dbe669b DA |
2413 | "Failed to find FEC %pFX upon unregister, client %s", |
2414 | p, zebra_route_string(client->proto)); | |
d62a17ae | 2415 | return -1; |
2416 | } | |
5aba114a | 2417 | |
d62a17ae | 2418 | listnode_delete(fec->client_list, client); |
2419 | ||
2420 | if (IS_ZEBRA_DEBUG_MPLS) | |
b467b4b4 | 2421 | zlog_debug("FEC %pFX unregistered by client %s", p, |
d62a17ae | 2422 | zebra_route_string(client->proto)); |
2423 | ||
2424 | /* If not a configured entry, delete the FEC if no other clients. Before | |
2425 | * deleting, see if any LSP needs to be uninstalled. | |
2426 | */ | |
2427 | if (!(fec->flags & FEC_FLAG_CONFIGURED) | |
2428 | && list_isempty(fec->client_list)) { | |
2429 | mpls_label_t old_label = fec->label; | |
2430 | fec->label = MPLS_INVALID_LABEL; /* reset */ | |
2431 | fec_change_update_lsp(zvrf, fec, old_label); | |
2432 | fec_del(fec); | |
2433 | } | |
5aba114a | 2434 | |
d62a17ae | 2435 | return 0; |
5aba114a DS |
2436 | } |
2437 | ||
2438 | /* | |
2439 | * Cleanup any FECs registered by this client. | |
2440 | */ | |
453844ab | 2441 | static int zebra_mpls_cleanup_fecs_for_client(struct zserv *client) |
d62a17ae | 2442 | { |
453844ab | 2443 | struct zebra_vrf *zvrf = vrf_info_lookup(VRF_DEFAULT); |
d62a17ae | 2444 | struct route_node *rn; |
60e36561 | 2445 | struct zebra_fec *fec; |
d62a17ae | 2446 | struct listnode *node; |
2447 | struct zserv *fec_client; | |
2448 | int af; | |
2449 | ||
2450 | for (af = AFI_IP; af < AFI_MAX; af++) { | |
2451 | if (zvrf->fec_table[af] == NULL) | |
2452 | continue; | |
2453 | ||
2454 | for (rn = route_top(zvrf->fec_table[af]); rn; | |
2455 | rn = route_next(rn)) { | |
2456 | fec = rn->info; | |
2457 | if (!fec || list_isempty(fec->client_list)) | |
2458 | continue; | |
2459 | ||
2460 | for (ALL_LIST_ELEMENTS_RO(fec->client_list, node, | |
2461 | fec_client)) { | |
2462 | if (fec_client == client) { | |
2463 | listnode_delete(fec->client_list, | |
2464 | fec_client); | |
2465 | if (!(fec->flags & FEC_FLAG_CONFIGURED) | |
2466 | && list_isempty(fec->client_list)) | |
2467 | fec_del(fec); | |
2468 | break; | |
2469 | } | |
2470 | } | |
2471 | } | |
2472 | } | |
5aba114a | 2473 | |
d62a17ae | 2474 | return 0; |
5aba114a DS |
2475 | } |
2476 | ||
651105b5 RW |
2477 | struct lsp_uninstall_args { |
2478 | struct hash *lsp_table; | |
2479 | enum lsp_types_t type; | |
2480 | }; | |
2481 | ||
2482 | /* | |
2483 | * Cleanup MPLS labels registered by this client. | |
2484 | */ | |
2485 | static int zebra_mpls_cleanup_zclient_labels(struct zserv *client) | |
2486 | { | |
2487 | struct vrf *vrf; | |
2488 | struct zebra_vrf *zvrf; | |
2489 | ||
2490 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { | |
2491 | struct lsp_uninstall_args args; | |
2492 | ||
2493 | zvrf = vrf->info; | |
2494 | if (!zvrf) | |
2495 | continue; | |
2496 | ||
2497 | /* Cleanup LSPs. */ | |
2498 | args.lsp_table = zvrf->lsp_table; | |
2499 | args.type = lsp_type_from_re_type(client->proto); | |
2500 | hash_iterate(zvrf->lsp_table, mpls_lsp_uninstall_all_type, | |
2501 | &args); | |
2502 | ||
2503 | /* Cleanup FTNs. */ | |
90a570ed EDP |
2504 | mpls_ftn_uninstall_all(zvrf, AFI_IP, |
2505 | lsp_type_from_re_type(client->proto)); | |
2506 | mpls_ftn_uninstall_all(zvrf, AFI_IP6, | |
2507 | lsp_type_from_re_type(client->proto)); | |
651105b5 RW |
2508 | } |
2509 | ||
2510 | return 0; | |
2511 | } | |
2512 | ||
f31e084c DS |
2513 | /* |
2514 | * Return FEC (if any) to which this label is bound. | |
2515 | * Note: Only works for per-prefix binding and when the label is not | |
2516 | * implicit-null. | |
2517 | * TODO: Currently walks entire table, can optimize later with another | |
2518 | * hash.. | |
2519 | */ | |
60e36561 DS |
2520 | struct zebra_fec *zebra_mpls_fec_for_label(struct zebra_vrf *zvrf, |
2521 | mpls_label_t label) | |
d62a17ae | 2522 | { |
2523 | struct route_node *rn; | |
60e36561 | 2524 | struct zebra_fec *fec; |
d62a17ae | 2525 | int af; |
2526 | ||
2527 | for (af = AFI_IP; af < AFI_MAX; af++) { | |
2528 | if (zvrf->fec_table[af] == NULL) | |
2529 | continue; | |
2530 | ||
2531 | for (rn = route_top(zvrf->fec_table[af]); rn; | |
2532 | rn = route_next(rn)) { | |
2533 | if (!rn->info) | |
2534 | continue; | |
2535 | fec = rn->info; | |
2536 | if (fec->label == label) | |
2537 | return fec; | |
2538 | } | |
2539 | } | |
f31e084c | 2540 | |
d62a17ae | 2541 | return NULL; |
f31e084c DS |
2542 | } |
2543 | ||
2544 | /* | |
2545 | * Inform if specified label is currently bound to a FEC or not. | |
2546 | */ | |
d62a17ae | 2547 | int zebra_mpls_label_already_bound(struct zebra_vrf *zvrf, mpls_label_t label) |
f31e084c | 2548 | { |
d62a17ae | 2549 | return (zebra_mpls_fec_for_label(zvrf, label) ? 1 : 0); |
f31e084c DS |
2550 | } |
2551 | ||
2552 | /* | |
5aba114a | 2553 | * Add static FEC to label binding. If there are clients registered for this |
a64448ba DS |
2554 | * FEC, notify them. If there are labeled routes for this FEC, install the |
2555 | * label forwarding entry. | |
9d303b37 | 2556 | */ |
d62a17ae | 2557 | int zebra_mpls_static_fec_add(struct zebra_vrf *zvrf, struct prefix *p, |
2558 | mpls_label_t in_label) | |
2559 | { | |
2560 | struct route_table *table; | |
60e36561 | 2561 | struct zebra_fec *fec; |
d62a17ae | 2562 | mpls_label_t old_label; |
2563 | int ret = 0; | |
2564 | ||
2565 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
2566 | if (!table) | |
2567 | return -1; | |
2568 | ||
d62a17ae | 2569 | /* Update existing FEC or create a new one. */ |
2570 | fec = fec_find(table, p); | |
2571 | if (!fec) { | |
2572 | fec = fec_add(table, p, in_label, FEC_FLAG_CONFIGURED, | |
2573 | MPLS_INVALID_LABEL_INDEX); | |
2574 | if (!fec) { | |
e914ccbe | 2575 | flog_err(EC_ZEBRA_FEC_ADD_FAILED, |
2dbe669b | 2576 | "Failed to add FEC %pFX upon config", p); |
d62a17ae | 2577 | return -1; |
2578 | } | |
2579 | ||
2580 | if (IS_ZEBRA_DEBUG_MPLS) | |
b467b4b4 | 2581 | zlog_debug("Add fec %pFX label %u", p, in_label); |
d62a17ae | 2582 | } else { |
2583 | fec->flags |= FEC_FLAG_CONFIGURED; | |
2584 | if (fec->label == in_label) | |
2585 | /* Duplicate config */ | |
2586 | return 0; | |
2587 | ||
2588 | /* Label change, update clients. */ | |
2589 | old_label = fec->label; | |
2590 | if (IS_ZEBRA_DEBUG_MPLS) | |
b467b4b4 | 2591 | zlog_debug("Update fec %pFX new label %u", p, in_label); |
d62a17ae | 2592 | |
2593 | fec->label = in_label; | |
2594 | fec_update_clients(fec); | |
2595 | ||
2596 | /* Update label forwarding entries appropriately */ | |
2597 | ret = fec_change_update_lsp(zvrf, fec, old_label); | |
2598 | } | |
2599 | ||
2600 | return ret; | |
f31e084c DS |
2601 | } |
2602 | ||
2603 | /* | |
5aba114a DS |
2604 | * Remove static FEC to label binding. If there are no clients registered |
2605 | * for this FEC, delete the FEC; else notify clients | |
28d58fd7 VV |
2606 | * Note: Upon delete of static binding, if label index exists for this FEC, |
2607 | * client may need to be updated with derived label. | |
f31e084c | 2608 | */ |
d62a17ae | 2609 | int zebra_mpls_static_fec_del(struct zebra_vrf *zvrf, struct prefix *p) |
2610 | { | |
2611 | struct route_table *table; | |
60e36561 | 2612 | struct zebra_fec *fec; |
d62a17ae | 2613 | mpls_label_t old_label; |
d62a17ae | 2614 | |
2615 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
2616 | if (!table) | |
2617 | return -1; | |
2618 | ||
2619 | fec = fec_find(table, p); | |
2620 | if (!fec) { | |
e914ccbe | 2621 | flog_err(EC_ZEBRA_FEC_RM_FAILED, |
b467b4b4 | 2622 | "Failed to find FEC %pFX upon delete", p); |
d62a17ae | 2623 | return -1; |
2624 | } | |
2625 | ||
2626 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2dbe669b | 2627 | zlog_debug("Delete fec %pFX label %u label index %u", p, |
57592a53 | 2628 | fec->label, fec->label_index); |
d62a17ae | 2629 | } |
2630 | ||
2631 | old_label = fec->label; | |
2632 | fec->flags &= ~FEC_FLAG_CONFIGURED; | |
2633 | fec->label = MPLS_INVALID_LABEL; | |
2634 | ||
2635 | /* If no client exists, just delete the FEC. */ | |
2636 | if (list_isempty(fec->client_list)) { | |
2637 | fec_del(fec); | |
2638 | return 0; | |
2639 | } | |
2640 | ||
2641 | /* Derive the local label (from label index) or reset it. */ | |
2642 | fec_derive_label_from_index(zvrf, fec); | |
2643 | ||
2644 | /* If there is a label change, update clients. */ | |
2645 | if (fec->label == old_label) | |
2646 | return 0; | |
2647 | fec_update_clients(fec); | |
2648 | ||
2649 | /* Update label forwarding entries appropriately */ | |
2650 | return fec_change_update_lsp(zvrf, fec, old_label); | |
f31e084c DS |
2651 | } |
2652 | ||
2653 | /* | |
2654 | * Display MPLS FEC to label binding configuration (VTY command handler). | |
2655 | */ | |
d62a17ae | 2656 | int zebra_mpls_write_fec_config(struct vty *vty, struct zebra_vrf *zvrf) |
f31e084c | 2657 | { |
d62a17ae | 2658 | struct route_node *rn; |
2659 | int af; | |
60e36561 | 2660 | struct zebra_fec *fec; |
d62a17ae | 2661 | int write = 0; |
f31e084c | 2662 | |
d62a17ae | 2663 | for (af = AFI_IP; af < AFI_MAX; af++) { |
2664 | if (zvrf->fec_table[af] == NULL) | |
2665 | continue; | |
f31e084c | 2666 | |
d62a17ae | 2667 | for (rn = route_top(zvrf->fec_table[af]); rn; |
2668 | rn = route_next(rn)) { | |
2669 | if (!rn->info) | |
2670 | continue; | |
f31e084c | 2671 | |
d62a17ae | 2672 | char lstr[BUFSIZ]; |
2673 | fec = rn->info; | |
f31e084c | 2674 | |
d62a17ae | 2675 | if (!(fec->flags & FEC_FLAG_CONFIGURED)) |
2676 | continue; | |
f31e084c | 2677 | |
d62a17ae | 2678 | write = 1; |
2dbe669b | 2679 | vty_out(vty, "mpls label bind %pFX %s\n", &rn->p, |
d62a17ae | 2680 | label2str(fec->label, lstr, BUFSIZ)); |
2681 | } | |
2682 | } | |
f31e084c | 2683 | |
d62a17ae | 2684 | return write; |
f31e084c DS |
2685 | } |
2686 | ||
2687 | /* | |
2688 | * Display MPLS FEC to label binding (VTY command handler). | |
2689 | */ | |
d62a17ae | 2690 | void zebra_mpls_print_fec_table(struct vty *vty, struct zebra_vrf *zvrf) |
f31e084c | 2691 | { |
d62a17ae | 2692 | struct route_node *rn; |
2693 | int af; | |
f31e084c | 2694 | |
d62a17ae | 2695 | for (af = AFI_IP; af < AFI_MAX; af++) { |
2696 | if (zvrf->fec_table[af] == NULL) | |
2697 | continue; | |
f31e084c | 2698 | |
d62a17ae | 2699 | for (rn = route_top(zvrf->fec_table[af]); rn; |
2700 | rn = route_next(rn)) { | |
2701 | if (!rn->info) | |
2702 | continue; | |
2703 | fec_print(rn->info, vty); | |
2704 | } | |
2705 | } | |
f31e084c DS |
2706 | } |
2707 | ||
2708 | /* | |
2709 | * Display MPLS FEC to label binding for a specific FEC (VTY command handler). | |
2710 | */ | |
d62a17ae | 2711 | void zebra_mpls_print_fec(struct vty *vty, struct zebra_vrf *zvrf, |
2712 | struct prefix *p) | |
f31e084c | 2713 | { |
d62a17ae | 2714 | struct route_table *table; |
2715 | struct route_node *rn; | |
f31e084c | 2716 | |
d62a17ae | 2717 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; |
2718 | if (!table) | |
2719 | return; | |
f31e084c | 2720 | |
d62a17ae | 2721 | apply_mask(p); |
2722 | rn = route_node_lookup(table, p); | |
2723 | if (!rn) | |
2724 | return; | |
f31e084c | 2725 | |
d62a17ae | 2726 | route_unlock_node(rn); |
2727 | if (!rn->info) | |
2728 | return; | |
f31e084c | 2729 | |
d62a17ae | 2730 | fec_print(rn->info, vty); |
f31e084c DS |
2731 | } |
2732 | ||
f2e7f4eb MS |
2733 | static void mpls_zebra_nhe_update(struct route_entry *re, afi_t afi, |
2734 | struct nhg_hash_entry *new_nhe) | |
19474c9c SW |
2735 | { |
2736 | struct nhg_hash_entry *nhe; | |
2737 | ||
f2e7f4eb | 2738 | nhe = zebra_nhg_rib_find_nhe(new_nhe, afi); |
19474c9c | 2739 | |
5463ce26 | 2740 | route_entry_update_nhe(re, nhe); |
19474c9c SW |
2741 | } |
2742 | ||
f2e7f4eb MS |
2743 | static bool ftn_update_nexthop(bool add_p, struct nexthop *nexthop, |
2744 | enum lsp_types_t type, | |
2745 | const struct zapi_nexthop *znh) | |
8f77d0ee | 2746 | { |
f2e7f4eb MS |
2747 | if (add_p && nexthop->nh_label_type == ZEBRA_LSP_NONE) |
2748 | nexthop_add_labels(nexthop, type, znh->label_num, znh->labels); | |
2749 | else if (!add_p && nexthop->nh_label_type == type) | |
8f77d0ee DS |
2750 | nexthop_del_labels(nexthop); |
2751 | else | |
2752 | return false; | |
2753 | ||
2754 | return true; | |
2755 | } | |
2756 | ||
f2e7f4eb MS |
2757 | int mpls_ftn_uninstall(struct zebra_vrf *zvrf, enum lsp_types_t type, |
2758 | struct prefix *prefix, uint8_t route_type, | |
2759 | unsigned short route_instance) | |
d62a17ae | 2760 | { |
2761 | struct route_table *table; | |
2762 | struct route_node *rn; | |
2763 | struct route_entry *re; | |
2764 | struct nexthop *nexthop; | |
f2e7f4eb | 2765 | struct nhg_hash_entry *new_nhe; |
da137142 | 2766 | afi_t afi = family2afi(prefix->family); |
d62a17ae | 2767 | |
2768 | /* Lookup table. */ | |
da137142 | 2769 | table = zebra_vrf_table(afi, SAFI_UNICAST, zvrf_id(zvrf)); |
d62a17ae | 2770 | if (!table) |
2771 | return -1; | |
2772 | ||
2773 | /* Lookup existing route */ | |
2774 | rn = route_node_get(table, prefix); | |
a2addae8 | 2775 | RNODE_FOREACH_RE (rn, re) { |
d62a17ae | 2776 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
2777 | continue; | |
e132dea0 | 2778 | if (re->type == route_type && re->instance == route_instance) |
d62a17ae | 2779 | break; |
88d88a9c | 2780 | } |
d62a17ae | 2781 | if (re == NULL) |
2782 | return -1; | |
2783 | ||
da137142 | 2784 | /* |
f2e7f4eb MS |
2785 | * Nexthops are now shared by multiple routes, so we have to make |
2786 | * a local copy, modify the copy, then update the route. | |
da137142 | 2787 | */ |
f2e7f4eb | 2788 | new_nhe = zebra_nhe_copy(re->nhe, 0); |
da137142 | 2789 | |
f2e7f4eb MS |
2790 | for (nexthop = new_nhe->nhg.nexthop; nexthop; nexthop = nexthop->next) |
2791 | nexthop_del_labels(nexthop); | |
2792 | ||
2793 | /* Update backup routes/nexthops also, if present. */ | |
2794 | if (zebra_nhg_get_backup_nhg(new_nhe) != NULL) { | |
2795 | for (nexthop = new_nhe->backup_info->nhe->nhg.nexthop; nexthop; | |
2796 | nexthop = nexthop->next) | |
2797 | nexthop_del_labels(nexthop); | |
2798 | } | |
2799 | ||
2800 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
2801 | SET_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED); | |
2802 | ||
68110c42 MS |
2803 | /* This will create (or ref) a new nhe, so we will discard the local |
2804 | * temporary nhe | |
2805 | */ | |
f2e7f4eb MS |
2806 | mpls_zebra_nhe_update(re, afi, new_nhe); |
2807 | ||
2808 | zebra_nhg_free(new_nhe); | |
2809 | ||
2810 | rib_queue_add(rn); | |
2811 | ||
2812 | return 0; | |
2813 | } | |
2814 | ||
2815 | /* | |
2816 | * Iterate through a list of nexthops, for a match for 'znh'. If found, | |
2817 | * update its labels according to 'add_p', and return 'true' if successful. | |
2818 | */ | |
2819 | static bool ftn_update_znh(bool add_p, enum lsp_types_t type, | |
2820 | struct nexthop *head, const struct zapi_nexthop *znh) | |
2821 | { | |
2822 | bool found = false, success = false; | |
2823 | struct nexthop *nexthop; | |
2824 | ||
2825 | for (nexthop = head; nexthop; nexthop = nexthop->next) { | |
d62a17ae | 2826 | switch (nexthop->type) { |
2827 | case NEXTHOP_TYPE_IPV4: | |
2828 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
f2e7f4eb MS |
2829 | if (znh->type != NEXTHOP_TYPE_IPV4 |
2830 | && znh->type != NEXTHOP_TYPE_IPV4_IFINDEX) | |
d62a17ae | 2831 | continue; |
f2e7f4eb MS |
2832 | if (!IPV4_ADDR_SAME(&nexthop->gate.ipv4, |
2833 | &znh->gate.ipv4)) | |
d62a17ae | 2834 | continue; |
2835 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
f2e7f4eb | 2836 | && nexthop->ifindex != znh->ifindex) |
d62a17ae | 2837 | continue; |
f2e7f4eb | 2838 | |
8f77d0ee | 2839 | found = true; |
f2e7f4eb MS |
2840 | |
2841 | if (!ftn_update_nexthop(add_p, nexthop, type, znh)) | |
2842 | break; | |
2843 | ||
2844 | success = true; | |
8f77d0ee | 2845 | break; |
d62a17ae | 2846 | case NEXTHOP_TYPE_IPV6: |
2847 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
f2e7f4eb MS |
2848 | if (znh->type != NEXTHOP_TYPE_IPV6 |
2849 | && znh->type != NEXTHOP_TYPE_IPV6_IFINDEX) | |
d62a17ae | 2850 | continue; |
f2e7f4eb MS |
2851 | if (!IPV6_ADDR_SAME(&nexthop->gate.ipv6, |
2852 | &znh->gate.ipv6)) | |
d62a17ae | 2853 | continue; |
2854 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
f2e7f4eb | 2855 | && nexthop->ifindex != znh->ifindex) |
d62a17ae | 2856 | continue; |
f2e7f4eb | 2857 | |
8f77d0ee | 2858 | found = true; |
f2e7f4eb MS |
2859 | |
2860 | if (!ftn_update_nexthop(add_p, nexthop, type, znh)) | |
2861 | break; | |
2862 | success = true; | |
8f77d0ee | 2863 | break; |
10cc80ca | 2864 | case NEXTHOP_TYPE_IFINDEX: |
a44e3106 MS |
2865 | if (znh->type != NEXTHOP_TYPE_IFINDEX) |
2866 | continue; | |
2867 | if (nexthop->ifindex != znh->ifindex) | |
2868 | continue; | |
2869 | ||
2870 | found = true; | |
2871 | ||
2872 | if (!ftn_update_nexthop(add_p, nexthop, type, znh)) | |
2873 | break; | |
2874 | success = true; | |
d62a17ae | 2875 | break; |
a44e3106 MS |
2876 | case NEXTHOP_TYPE_BLACKHOLE: |
2877 | /* Not valid */ | |
2878 | continue; | |
d62a17ae | 2879 | } |
f2e7f4eb MS |
2880 | |
2881 | if (found) | |
2882 | break; | |
d62a17ae | 2883 | } |
d62a17ae | 2884 | |
f2e7f4eb MS |
2885 | return success; |
2886 | } | |
19474c9c | 2887 | |
f2e7f4eb MS |
2888 | /* |
2889 | * Install/uninstall LSP and (optionally) FEC-To-NHLFE (FTN) bindings, | |
2890 | * using zapi message info. | |
2891 | * There are several changes that need to be made, in several zebra | |
2892 | * data structures, so we want to do all the work required at once. | |
2893 | */ | |
2894 | int mpls_zapi_labels_process(bool add_p, struct zebra_vrf *zvrf, | |
2895 | const struct zapi_labels *zl) | |
2896 | { | |
2897 | int i, counter, ret = 0; | |
2dbe669b | 2898 | char buf[NEXTHOP_STRLEN]; |
f2e7f4eb MS |
2899 | const struct zapi_nexthop *znh; |
2900 | struct route_table *table; | |
2901 | struct route_node *rn = NULL; | |
2902 | struct route_entry *re = NULL; | |
2903 | struct nhg_hash_entry *new_nhe = NULL; | |
2904 | bool found; | |
2905 | afi_t afi = AFI_IP; | |
2906 | const struct prefix *prefix = NULL; | |
2907 | struct hash *lsp_table; | |
a7d2146a | 2908 | struct zebra_ile tmp_ile; |
8f74a383 | 2909 | struct zebra_lsp *lsp = NULL; |
19474c9c | 2910 | |
f2e7f4eb MS |
2911 | /* Prep LSP for add case */ |
2912 | if (add_p) { | |
2913 | /* Lookup table. */ | |
2914 | lsp_table = zvrf->lsp_table; | |
2915 | if (!lsp_table) | |
2916 | return -1; | |
2917 | ||
2918 | /* Find or create LSP object */ | |
2919 | tmp_ile.in_label = zl->local_label; | |
2920 | lsp = hash_get(lsp_table, &tmp_ile, lsp_alloc); | |
da137142 SW |
2921 | } |
2922 | ||
f2e7f4eb MS |
2923 | /* Prep for route/FEC update if requested */ |
2924 | if (CHECK_FLAG(zl->message, ZAPI_LABELS_FTN)) { | |
2925 | prefix = &zl->route.prefix; | |
da137142 | 2926 | |
f2e7f4eb | 2927 | afi = family2afi(prefix->family); |
ce549947 | 2928 | |
f2e7f4eb MS |
2929 | /* Lookup table. */ |
2930 | table = zebra_vrf_table(afi, SAFI_UNICAST, zvrf_id(zvrf)); | |
2931 | if (table) { | |
2932 | /* Lookup existing route */ | |
2933 | rn = route_node_get(table, prefix); | |
2934 | RNODE_FOREACH_RE(rn, re) { | |
2935 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
2936 | continue; | |
2937 | if (re->type == zl->route.type && | |
2938 | re->instance == zl->route.instance) | |
2939 | break; | |
2940 | } | |
2941 | } | |
ea6b290b | 2942 | |
f2e7f4eb MS |
2943 | if (re) { |
2944 | /* | |
2945 | * Copy over current nexthops into a temporary group. | |
2946 | * We can't just change the values here since the nhgs | |
2947 | * are shared and if the labels change, we'll need | |
2948 | * to find or create a new nhg. We need to create | |
2949 | * a whole temporary group, make changes to it, | |
2950 | * then attach that to the route. | |
2951 | */ | |
2952 | new_nhe = zebra_nhe_copy(re->nhe, 0); | |
ea6b290b | 2953 | |
f2e7f4eb MS |
2954 | } else { |
2955 | /* | |
2956 | * The old version of the zapi code | |
2957 | * attempted to manage LSPs before trying to | |
2958 | * find a route/FEC, so we'll continue that way. | |
2959 | */ | |
2dbe669b DA |
2960 | if (IS_ZEBRA_DEBUG_RECV || IS_ZEBRA_DEBUG_MPLS) |
2961 | zlog_debug( | |
2962 | "%s: FTN update requested: no route for prefix %pFX", | |
2963 | __func__, prefix); | |
f2e7f4eb MS |
2964 | } |
2965 | } | |
2966 | ||
2967 | /* | |
2968 | * Use info from the zapi nexthops to add/replace/remove LSP/FECs | |
2969 | */ | |
2970 | ||
2971 | counter = 0; | |
2972 | for (i = 0; i < zl->nexthop_num; i++) { | |
2973 | ||
2974 | znh = &zl->nexthops[i]; | |
2975 | ||
2976 | /* Attempt LSP update */ | |
2977 | if (add_p) | |
2978 | ret = lsp_znh_install(lsp, zl->type, znh); | |
2979 | else | |
2980 | ret = mpls_lsp_uninstall(zvrf, zl->type, | |
2981 | zl->local_label, znh->type, | |
cc1b9746 MS |
2982 | &znh->gate, znh->ifindex, |
2983 | false); | |
f2e7f4eb MS |
2984 | if (ret < 0) { |
2985 | if (IS_ZEBRA_DEBUG_RECV || IS_ZEBRA_DEBUG_MPLS) { | |
2986 | zapi_nexthop2str(znh, buf, sizeof(buf)); | |
2987 | zlog_debug("%s: Unable to %sinstall LSP: label %u, znh %s", | |
2988 | __func__, (add_p ? "" : "un"), | |
2989 | zl->local_label, buf); | |
2990 | } | |
ea6b290b | 2991 | continue; |
f2e7f4eb MS |
2992 | } |
2993 | ||
2994 | /* Attempt route/FEC update if requested */ | |
2995 | if (re == NULL) | |
2996 | continue; | |
2997 | ||
2998 | /* Search the route's nexthops for a match, and update it. */ | |
2999 | found = ftn_update_znh(add_p, zl->type, new_nhe->nhg.nexthop, | |
3000 | znh); | |
3001 | if (found) { | |
3002 | counter++; | |
3003 | } else if (IS_ZEBRA_DEBUG_RECV | IS_ZEBRA_DEBUG_MPLS) { | |
3004 | zapi_nexthop2str(znh, buf, sizeof(buf)); | |
2dbe669b DA |
3005 | zlog_debug( |
3006 | "%s: Unable to update FEC: prefix %pFX, label %u, znh %s", | |
3007 | __func__, prefix, zl->local_label, buf); | |
f2e7f4eb | 3008 | } |
ea6b290b | 3009 | } |
ea6b290b | 3010 | |
f2e7f4eb MS |
3011 | /* |
3012 | * Process backup LSPs/nexthop entries also. We associate backup | |
3013 | * LSP info with backup nexthops. | |
3014 | */ | |
3015 | if (!CHECK_FLAG(zl->message, ZAPI_LABELS_HAS_BACKUPS)) | |
3016 | goto znh_done; | |
19474c9c | 3017 | |
f2e7f4eb | 3018 | for (i = 0; i < zl->backup_nexthop_num; i++) { |
ea6b290b | 3019 | |
f2e7f4eb | 3020 | znh = &zl->backup_nexthops[i]; |
19474c9c | 3021 | |
f2e7f4eb MS |
3022 | if (add_p) |
3023 | ret = lsp_backup_znh_install(lsp, zl->type, znh); | |
3024 | else | |
cc1b9746 MS |
3025 | ret = mpls_lsp_uninstall(zvrf, zl->type, |
3026 | zl->local_label, | |
3027 | znh->type, &znh->gate, | |
3028 | znh->ifindex, true); | |
f2e7f4eb MS |
3029 | |
3030 | if (ret < 0) { | |
3031 | if (IS_ZEBRA_DEBUG_RECV || | |
3032 | IS_ZEBRA_DEBUG_MPLS) { | |
3033 | zapi_nexthop2str(znh, buf, sizeof(buf)); | |
3034 | zlog_debug("%s: Unable to %sinstall backup LSP: label %u, znh %s", | |
3035 | __func__, (add_p ? "" : "un"), | |
3036 | zl->local_label, buf); | |
3037 | } | |
3038 | continue; | |
3039 | } | |
19474c9c | 3040 | |
f2e7f4eb MS |
3041 | /* Attempt backup nexthop/FEC update if requested */ |
3042 | if (re == NULL || zebra_nhg_get_backup_nhg(new_nhe) == NULL) | |
3043 | continue; | |
19474c9c | 3044 | |
f2e7f4eb MS |
3045 | /* Search the route's backup nexthops for a match |
3046 | * and update it. | |
3047 | */ | |
3048 | found = ftn_update_znh(add_p, zl->type, | |
3049 | new_nhe->backup_info->nhe->nhg.nexthop, | |
3050 | znh); | |
3051 | if (found) { | |
3052 | counter++; | |
3053 | } else if (IS_ZEBRA_DEBUG_RECV | IS_ZEBRA_DEBUG_MPLS) { | |
3054 | zapi_nexthop2str(znh, buf, sizeof(buf)); | |
2dbe669b DA |
3055 | zlog_debug( |
3056 | "%s: Unable to update backup FEC: prefix %pFX, label %u, znh %s", | |
3057 | __func__, prefix, zl->local_label, buf); | |
f2e7f4eb MS |
3058 | } |
3059 | } | |
ea6b290b | 3060 | |
f2e7f4eb MS |
3061 | znh_done: |
3062 | ||
3063 | /* | |
3064 | * If we made changes, update the route, and schedule it | |
3065 | * for rib processing | |
3066 | */ | |
3067 | if (re != NULL && counter > 0) { | |
3068 | assert(rn != NULL); | |
3069 | ||
3070 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
3071 | SET_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED); | |
3072 | ||
3073 | mpls_zebra_nhe_update(re, afi, new_nhe); | |
3074 | ||
3075 | rib_queue_add(rn); | |
3076 | } | |
3077 | ||
3078 | if (new_nhe) | |
3079 | zebra_nhg_free(new_nhe); | |
3080 | ||
3081 | return ret; | |
ea6b290b RW |
3082 | } |
3083 | ||
ce549947 RW |
3084 | /* |
3085 | * Install/update a NHLFE for an LSP in the forwarding table. This may be | |
3086 | * a new LSP entry or a new NHLFE for an existing in-label or an update of | |
3087 | * the out-label for an existing NHLFE (update case). | |
3088 | */ | |
f2595bd5 | 3089 | static struct zebra_nhlfe * |
8f74a383 DS |
3090 | lsp_add_nhlfe(struct zebra_lsp *lsp, enum lsp_types_t type, |
3091 | uint8_t num_out_labels, const mpls_label_t *out_labels, | |
3092 | enum nexthop_types_t gtype, const union g_addr *gate, | |
3093 | ifindex_t ifindex, bool is_backup) | |
d62a17ae | 3094 | { |
f2595bd5 | 3095 | struct zebra_nhlfe *nhlfe; |
cd4bb96f | 3096 | char buf[MPLS_LABEL_STRLEN]; |
cc1b9746 | 3097 | const char *backup_str; |
e4a1ec74 | 3098 | |
cc1b9746 MS |
3099 | if (is_backup) { |
3100 | nhlfe = nhlfe_find(&lsp->backup_nhlfe_list, type, gtype, | |
3101 | gate, ifindex); | |
3102 | backup_str = "backup "; | |
d62a17ae | 3103 | } else { |
cc1b9746 MS |
3104 | nhlfe = nhlfe_find(&lsp->nhlfe_list, type, gtype, gate, |
3105 | ifindex); | |
3106 | backup_str = ""; | |
d62a17ae | 3107 | } |
3108 | ||
cd4bb96f MS |
3109 | if (nhlfe) { |
3110 | struct nexthop *nh = nhlfe->nexthop; | |
3111 | ||
3112 | assert(nh); | |
3113 | assert(nh->nh_label); | |
3114 | ||
3115 | /* Clear deleted flag (in case it was set) */ | |
3116 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
3117 | if (nh->nh_label->num_labels == num_out_labels | |
3118 | && !memcmp(nh->nh_label->label, out_labels, | |
3119 | sizeof(mpls_label_t) * num_out_labels)) | |
3120 | /* No change */ | |
3121 | return nhlfe; | |
3122 | ||
3123 | if (IS_ZEBRA_DEBUG_MPLS) { | |
3124 | char buf2[MPLS_LABEL_STRLEN]; | |
3125 | char buf3[MPLS_LABEL_STRLEN]; | |
3126 | ||
3127 | nhlfe2str(nhlfe, buf, sizeof(buf)); | |
3128 | mpls_label2str(num_out_labels, out_labels, buf2, | |
3129 | sizeof(buf2), 0); | |
3130 | mpls_label2str(nh->nh_label->num_labels, | |
3131 | nh->nh_label->label, buf3, sizeof(buf3), | |
3132 | 0); | |
3133 | ||
cc1b9746 MS |
3134 | zlog_debug("LSP in-label %u type %d %snexthop %s out-label(s) changed to %s (old %s)", |
3135 | lsp->ile.in_label, type, backup_str, buf, | |
3136 | buf2, buf3); | |
cd4bb96f MS |
3137 | } |
3138 | ||
3139 | /* Update out label(s), trigger processing. */ | |
3140 | if (nh->nh_label->num_labels == num_out_labels) | |
3141 | memcpy(nh->nh_label->label, out_labels, | |
3142 | sizeof(mpls_label_t) * num_out_labels); | |
3143 | else { | |
3144 | nexthop_del_labels(nh); | |
3145 | nexthop_add_labels(nh, type, num_out_labels, | |
3146 | out_labels); | |
3147 | } | |
3148 | } else { | |
3149 | /* Add LSP entry to this nexthop */ | |
cc1b9746 MS |
3150 | nhlfe = nhlfe_add(lsp, type, gtype, gate, ifindex, |
3151 | num_out_labels, out_labels, is_backup); | |
cd4bb96f MS |
3152 | if (!nhlfe) |
3153 | return NULL; | |
3154 | ||
3155 | if (IS_ZEBRA_DEBUG_MPLS) { | |
3156 | char buf2[MPLS_LABEL_STRLEN]; | |
3157 | ||
3158 | nhlfe2str(nhlfe, buf, sizeof(buf)); | |
3159 | mpls_label2str(num_out_labels, out_labels, buf2, | |
3160 | sizeof(buf2), 0); | |
3161 | ||
cc1b9746 MS |
3162 | zlog_debug("Add LSP in-label %u type %d %snexthop %s out-label(s) %s", |
3163 | lsp->ile.in_label, type, backup_str, buf, | |
3164 | buf2); | |
cd4bb96f MS |
3165 | } |
3166 | ||
3167 | lsp->addr_family = NHLFE_FAMILY(nhlfe); | |
3168 | } | |
3169 | ||
3170 | /* Mark NHLFE, queue LSP for processing. */ | |
3171 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
3172 | ||
3173 | return nhlfe; | |
3174 | } | |
3175 | ||
3176 | /* | |
3177 | * Install an LSP and forwarding entry; used primarily | |
301a687a | 3178 | * from vrf zapi message processing. |
cd4bb96f MS |
3179 | */ |
3180 | int mpls_lsp_install(struct zebra_vrf *zvrf, enum lsp_types_t type, | |
3181 | mpls_label_t in_label, uint8_t num_out_labels, | |
3182 | const mpls_label_t *out_labels, enum nexthop_types_t gtype, | |
3183 | const union g_addr *gate, ifindex_t ifindex) | |
3184 | { | |
3185 | struct hash *lsp_table; | |
a7d2146a | 3186 | struct zebra_ile tmp_ile; |
8f74a383 | 3187 | struct zebra_lsp *lsp; |
f2595bd5 | 3188 | struct zebra_nhlfe *nhlfe; |
cd4bb96f MS |
3189 | |
3190 | /* Lookup table. */ | |
3191 | lsp_table = zvrf->lsp_table; | |
3192 | if (!lsp_table) | |
3193 | return -1; | |
3194 | ||
3195 | /* Find or create LSP object */ | |
3196 | tmp_ile.in_label = in_label; | |
3197 | lsp = hash_get(lsp_table, &tmp_ile, lsp_alloc); | |
cd4bb96f MS |
3198 | |
3199 | nhlfe = lsp_add_nhlfe(lsp, type, num_out_labels, out_labels, gtype, | |
cc1b9746 | 3200 | gate, ifindex, false /*backup*/); |
cd4bb96f MS |
3201 | if (nhlfe == NULL) |
3202 | return -1; | |
3203 | ||
3204 | /* Queue LSP for processing. */ | |
3205 | if (lsp_processq_add(lsp)) | |
3206 | return -1; | |
3207 | ||
3208 | return 0; | |
3209 | } | |
3210 | ||
3211 | /* | |
3212 | * Install or replace NHLFE, using info from zapi nexthop | |
3213 | */ | |
8f74a383 | 3214 | static int lsp_znh_install(struct zebra_lsp *lsp, enum lsp_types_t type, |
f2e7f4eb | 3215 | const struct zapi_nexthop *znh) |
cd4bb96f | 3216 | { |
f2595bd5 | 3217 | struct zebra_nhlfe *nhlfe; |
cd4bb96f | 3218 | |
cd4bb96f | 3219 | nhlfe = lsp_add_nhlfe(lsp, type, znh->label_num, znh->labels, |
cc1b9746 MS |
3220 | znh->type, &znh->gate, znh->ifindex, |
3221 | false /*backup*/); | |
cd4bb96f MS |
3222 | if (nhlfe == NULL) |
3223 | return -1; | |
3224 | ||
3225 | /* Update backup info if present */ | |
3226 | if (CHECK_FLAG(znh->flags, ZAPI_NEXTHOP_FLAG_HAS_BACKUP)) { | |
474aebd9 MS |
3227 | if (znh->backup_num > NEXTHOP_MAX_BACKUPS) { |
3228 | nhlfe_del(nhlfe); | |
3229 | return -1; | |
3230 | } | |
3231 | ||
3232 | nhlfe->nexthop->backup_num = znh->backup_num; | |
3233 | memcpy(nhlfe->nexthop->backup_idx, znh->backup_idx, | |
3234 | znh->backup_num); | |
cd4bb96f | 3235 | SET_FLAG(nhlfe->nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP); |
301a687a MS |
3236 | } else { |
3237 | /* Ensure there's no stale backup info */ | |
3238 | UNSET_FLAG(nhlfe->nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP); | |
3239 | nhlfe->nexthop->backup_num = 0; | |
cd4bb96f MS |
3240 | } |
3241 | ||
3242 | /* Queue LSP for processing. */ | |
3243 | if (lsp_processq_add(lsp)) | |
3244 | return -1; | |
3245 | ||
3246 | return 0; | |
3247 | } | |
3248 | ||
3249 | /* | |
3250 | * Install/update backup NHLFE for an LSP, using info from a zapi message. | |
3251 | */ | |
8f74a383 | 3252 | static int lsp_backup_znh_install(struct zebra_lsp *lsp, enum lsp_types_t type, |
f2e7f4eb | 3253 | const struct zapi_nexthop *znh) |
cd4bb96f | 3254 | { |
f2595bd5 | 3255 | struct zebra_nhlfe *nhlfe; |
cd4bb96f | 3256 | |
cc1b9746 MS |
3257 | nhlfe = lsp_add_nhlfe(lsp, type, znh->label_num, |
3258 | znh->labels, znh->type, &znh->gate, | |
3259 | znh->ifindex, true /*backup*/); | |
cd4bb96f MS |
3260 | if (nhlfe == NULL) { |
3261 | if (IS_ZEBRA_DEBUG_MPLS) | |
3262 | zlog_debug("%s: unable to add backup nhlfe, label: %u", | |
f2e7f4eb | 3263 | __func__, lsp->ile.in_label); |
cd4bb96f MS |
3264 | return -1; |
3265 | } | |
3266 | ||
3267 | /* Queue LSP for processing. */ | |
d62a17ae | 3268 | if (lsp_processq_add(lsp)) |
3269 | return -1; | |
3270 | ||
3271 | return 0; | |
ce549947 RW |
3272 | } |
3273 | ||
8f74a383 | 3274 | struct zebra_lsp *mpls_lsp_find(struct zebra_vrf *zvrf, mpls_label_t in_label) |
31f937fb SM |
3275 | { |
3276 | struct hash *lsp_table; | |
a7d2146a | 3277 | struct zebra_ile tmp_ile; |
31f937fb SM |
3278 | |
3279 | /* Lookup table. */ | |
3280 | lsp_table = zvrf->lsp_table; | |
3281 | if (!lsp_table) | |
3282 | return NULL; | |
3283 | ||
3284 | /* If entry is not present, exit. */ | |
3285 | tmp_ile.in_label = in_label; | |
3286 | return hash_lookup(lsp_table, &tmp_ile); | |
3287 | } | |
3288 | ||
ce549947 RW |
3289 | /* |
3290 | * Uninstall a particular NHLFE in the forwarding table. If this is | |
3291 | * the only NHLFE, the entire LSP forwarding entry has to be deleted. | |
3292 | */ | |
d62a17ae | 3293 | int mpls_lsp_uninstall(struct zebra_vrf *zvrf, enum lsp_types_t type, |
3294 | mpls_label_t in_label, enum nexthop_types_t gtype, | |
cc1b9746 MS |
3295 | const union g_addr *gate, ifindex_t ifindex, |
3296 | bool backup_p) | |
d62a17ae | 3297 | { |
3298 | struct hash *lsp_table; | |
a7d2146a | 3299 | struct zebra_ile tmp_ile; |
8f74a383 | 3300 | struct zebra_lsp *lsp; |
f2595bd5 | 3301 | struct zebra_nhlfe *nhlfe; |
cc1b9746 | 3302 | char buf[NEXTHOP_STRLEN]; |
4a2a5236 | 3303 | bool schedule_lsp = false; |
d62a17ae | 3304 | |
3305 | /* Lookup table. */ | |
3306 | lsp_table = zvrf->lsp_table; | |
3307 | if (!lsp_table) | |
3308 | return -1; | |
3309 | ||
3310 | /* If entry is not present, exit. */ | |
3311 | tmp_ile.in_label = in_label; | |
3312 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
3313 | if (!lsp) | |
3314 | return 0; | |
cc1b9746 MS |
3315 | |
3316 | if (backup_p) | |
3317 | nhlfe = nhlfe_find(&lsp->backup_nhlfe_list, type, gtype, | |
3318 | gate, ifindex); | |
3319 | else | |
3320 | nhlfe = nhlfe_find(&lsp->nhlfe_list, type, gtype, gate, | |
3321 | ifindex); | |
d62a17ae | 3322 | if (!nhlfe) |
3323 | return 0; | |
3324 | ||
3325 | if (IS_ZEBRA_DEBUG_MPLS) { | |
43a9f66c | 3326 | nhlfe2str(nhlfe, buf, sizeof(buf)); |
d62a17ae | 3327 | zlog_debug("Del LSP in-label %u type %d nexthop %s flags 0x%x", |
3328 | in_label, type, buf, nhlfe->flags); | |
3329 | } | |
3330 | ||
4a2a5236 MS |
3331 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED) || |
3332 | CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) | |
3333 | schedule_lsp = true; | |
3334 | ||
d62a17ae | 3335 | /* Mark NHLFE for delete or directly delete, as appropriate. */ |
4a2a5236 | 3336 | if (schedule_lsp) { |
d62a17ae | 3337 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); |
4a2a5236 MS |
3338 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); |
3339 | ||
3340 | if (IS_ZEBRA_DEBUG_MPLS) | |
3341 | zlog_debug("Schedule LSP in-label %u flags 0x%x", | |
3342 | lsp->ile.in_label, lsp->flags); | |
d62a17ae | 3343 | if (lsp_processq_add(lsp)) |
3344 | return -1; | |
3345 | } else { | |
3346 | nhlfe_del(nhlfe); | |
3347 | ||
3348 | /* Free LSP entry if no other NHLFEs and not scheduled. */ | |
f2e7f4eb | 3349 | lsp_check_free(lsp_table, &lsp); |
d62a17ae | 3350 | } |
3351 | return 0; | |
ce549947 RW |
3352 | } |
3353 | ||
ea6b290b RW |
3354 | int mpls_lsp_uninstall_all_vrf(struct zebra_vrf *zvrf, enum lsp_types_t type, |
3355 | mpls_label_t in_label) | |
3356 | { | |
3357 | struct hash *lsp_table; | |
a7d2146a | 3358 | struct zebra_ile tmp_ile; |
8f74a383 | 3359 | struct zebra_lsp *lsp; |
ea6b290b RW |
3360 | |
3361 | /* Lookup table. */ | |
3362 | lsp_table = zvrf->lsp_table; | |
3363 | if (!lsp_table) | |
3364 | return -1; | |
3365 | ||
3366 | /* If entry is not present, exit. */ | |
3367 | tmp_ile.in_label = in_label; | |
3368 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
3369 | if (!lsp) | |
3370 | return 0; | |
3371 | ||
3372 | return mpls_lsp_uninstall_all(lsp_table, lsp, type); | |
3373 | } | |
3374 | ||
ce549947 | 3375 | /* |
651105b5 | 3376 | * Uninstall all NHLFEs for a particular LSP forwarding entry. |
ce549947 RW |
3377 | * If no other NHLFEs exist, the entry would be deleted. |
3378 | */ | |
651105b5 | 3379 | static void mpls_lsp_uninstall_all_type(struct hash_bucket *bucket, void *ctxt) |
ce549947 | 3380 | { |
651105b5 | 3381 | struct lsp_uninstall_args *args = ctxt; |
8f74a383 | 3382 | struct zebra_lsp *lsp; |
d62a17ae | 3383 | struct hash *lsp_table; |
ce549947 | 3384 | |
8f74a383 | 3385 | lsp = (struct zebra_lsp *)bucket->data; |
ee70f629 | 3386 | if (nhlfe_list_first(&lsp->nhlfe_list) == NULL) |
d62a17ae | 3387 | return; |
ce549947 | 3388 | |
651105b5 | 3389 | lsp_table = args->lsp_table; |
d62a17ae | 3390 | if (!lsp_table) |
3391 | return; | |
ce549947 | 3392 | |
651105b5 | 3393 | mpls_lsp_uninstall_all(lsp_table, lsp, args->type); |
ce549947 RW |
3394 | } |
3395 | ||
3396 | /* | |
651105b5 RW |
3397 | * Uninstall all FEC-To-NHLFE (FTN) bindings of the given address-family and |
3398 | * LSP type. | |
ce549947 | 3399 | */ |
651105b5 RW |
3400 | static void mpls_ftn_uninstall_all(struct zebra_vrf *zvrf, |
3401 | int afi, enum lsp_types_t lsp_type) | |
d62a17ae | 3402 | { |
3403 | struct route_table *table; | |
3404 | struct route_node *rn; | |
3405 | struct route_entry *re; | |
3406 | struct nexthop *nexthop; | |
f2e7f4eb MS |
3407 | struct nexthop_group *nhg; |
3408 | bool update; | |
d62a17ae | 3409 | |
3410 | /* Process routes of interested address-families. */ | |
3411 | table = zebra_vrf_table(afi, SAFI_UNICAST, zvrf_id(zvrf)); | |
3412 | if (!table) | |
3413 | return; | |
3414 | ||
3415 | for (rn = route_top(table); rn; rn = route_next(rn)) { | |
f2e7f4eb MS |
3416 | update = false; |
3417 | ||
a2addae8 | 3418 | RNODE_FOREACH_RE (rn, re) { |
f2e7f4eb | 3419 | struct nhg_hash_entry *new_nhe; |
da137142 | 3420 | |
f2e7f4eb | 3421 | new_nhe = zebra_nhe_copy(re->nhe, 0); |
da137142 | 3422 | |
f2e7f4eb MS |
3423 | nhg = &new_nhe->nhg; |
3424 | for (nexthop = nhg->nexthop; nexthop; | |
407c87a6 | 3425 | nexthop = nexthop->next) { |
651105b5 | 3426 | if (nexthop->nh_label_type != lsp_type) |
407c87a6 DS |
3427 | continue; |
3428 | ||
d62a17ae | 3429 | nexthop_del_labels(nexthop); |
3430 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
3431 | SET_FLAG(re->status, | |
332ad713 | 3432 | ROUTE_ENTRY_LABELS_CHANGED); |
f2e7f4eb MS |
3433 | update = true; |
3434 | } | |
3435 | ||
3436 | /* Check for backup info and update that also */ | |
3437 | nhg = zebra_nhg_get_backup_nhg(new_nhe); | |
3438 | if (nhg != NULL) { | |
3439 | for (nexthop = nhg->nexthop; nexthop; | |
3440 | nexthop = nexthop->next) { | |
3441 | if (nexthop->nh_label_type != lsp_type) | |
3442 | continue; | |
3443 | ||
3444 | nexthop_del_labels(nexthop); | |
3445 | SET_FLAG(re->status, | |
3446 | ROUTE_ENTRY_CHANGED); | |
3447 | SET_FLAG(re->status, | |
3448 | ROUTE_ENTRY_LABELS_CHANGED); | |
3449 | update = true; | |
3450 | } | |
d62a17ae | 3451 | } |
da137142 | 3452 | |
19474c9c | 3453 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED)) |
f2e7f4eb | 3454 | mpls_zebra_nhe_update(re, afi, new_nhe); |
da137142 | 3455 | |
f2e7f4eb | 3456 | zebra_nhg_free(new_nhe); |
407c87a6 | 3457 | } |
d62a17ae | 3458 | |
3459 | if (update) | |
3460 | rib_queue_add(rn); | |
3461 | } | |
ce549947 RW |
3462 | } |
3463 | ||
1c1cf002 | 3464 | #if defined(HAVE_CUMULUS) |
7758e3f3 | 3465 | /* |
3466 | * Check that the label values used in LSP creation are consistent. The | |
3467 | * main criteria is that if there is ECMP, the label operation must still | |
3468 | * be consistent - i.e., all paths either do a swap or do PHP. This is due | |
3469 | * to current HW restrictions. | |
3470 | */ | |
d62a17ae | 3471 | int zebra_mpls_lsp_label_consistent(struct zebra_vrf *zvrf, |
3472 | mpls_label_t in_label, | |
3473 | mpls_label_t out_label, | |
3474 | enum nexthop_types_t gtype, | |
3475 | union g_addr *gate, ifindex_t ifindex) | |
3476 | { | |
3477 | struct hash *slsp_table; | |
a7d2146a | 3478 | struct zebra_ile tmp_ile; |
8f74a383 | 3479 | struct zebra_lsp *lsp; |
f2595bd5 | 3480 | struct zebra_nhlfe *nhlfe; |
608a57c0 | 3481 | const struct nexthop *nh; |
d62a17ae | 3482 | |
3483 | /* Lookup table. */ | |
3484 | slsp_table = zvrf->slsp_table; | |
3485 | if (!slsp_table) | |
3486 | return 0; | |
3487 | ||
3488 | /* If entry is not present, exit. */ | |
3489 | tmp_ile.in_label = in_label; | |
608a57c0 MS |
3490 | lsp = hash_lookup(slsp_table, &tmp_ile); |
3491 | if (!lsp) | |
d62a17ae | 3492 | return 1; |
3493 | ||
608a57c0 MS |
3494 | nhlfe = nhlfe_find(&lsp->nhlfe_list, ZEBRA_LSP_STATIC, |
3495 | gtype, gate, ifindex); | |
3496 | if (nhlfe) { | |
3497 | nh = nhlfe->nexthop; | |
3498 | ||
3499 | if (nh == NULL || nh->nh_label == NULL) | |
3500 | return 0; | |
3501 | ||
3502 | if (nh->nh_label->label[0] == out_label) | |
d62a17ae | 3503 | return 1; |
3504 | ||
3505 | /* If not only NHLFE, cannot allow label change. */ | |
608a57c0 MS |
3506 | if (nhlfe != nhlfe_list_first(&lsp->nhlfe_list) || |
3507 | nhlfe_list_next(&lsp->nhlfe_list, nhlfe) != NULL) | |
d62a17ae | 3508 | return 0; |
3509 | } else { | |
3510 | /* If other NHLFEs exist, label operation must match. */ | |
608a57c0 MS |
3511 | nhlfe = nhlfe_list_first(&lsp->nhlfe_list); |
3512 | if (nhlfe != NULL) { | |
d62a17ae | 3513 | int cur_op, new_op; |
3514 | ||
608a57c0 MS |
3515 | nh = nhlfe->nexthop; |
3516 | ||
3517 | if (nh == NULL || nh->nh_label == NULL) | |
3518 | return 0; | |
3519 | ||
3520 | cur_op = (nh->nh_label->label[0] == | |
ee70f629 | 3521 | MPLS_LABEL_IMPLICIT_NULL); |
70e98a7f | 3522 | new_op = (out_label == MPLS_LABEL_IMPLICIT_NULL); |
d62a17ae | 3523 | if (cur_op != new_op) |
3524 | return 0; | |
3525 | } | |
3526 | } | |
3527 | ||
3528 | /* Label values are good. */ | |
3529 | return 1; | |
7758e3f3 | 3530 | } |
1c1cf002 | 3531 | #endif /* HAVE_CUMULUS */ |
7758e3f3 | 3532 | |
3533 | /* | |
3534 | * Add static LSP entry. This may be the first entry for this incoming label | |
3535 | * or an additional nexthop; an existing entry may also have outgoing label | |
3536 | * changed. | |
3537 | * Note: The label operation (swap or PHP) is common for the LSP entry (all | |
3538 | * NHLFEs). | |
3539 | */ | |
d62a17ae | 3540 | int zebra_mpls_static_lsp_add(struct zebra_vrf *zvrf, mpls_label_t in_label, |
3541 | mpls_label_t out_label, | |
3542 | enum nexthop_types_t gtype, union g_addr *gate, | |
3543 | ifindex_t ifindex) | |
3544 | { | |
3545 | struct hash *slsp_table; | |
a7d2146a | 3546 | struct zebra_ile tmp_ile; |
8f74a383 | 3547 | struct zebra_lsp *lsp; |
f2595bd5 | 3548 | struct zebra_nhlfe *nhlfe; |
d62a17ae | 3549 | char buf[BUFSIZ]; |
3550 | ||
3551 | /* Lookup table. */ | |
3552 | slsp_table = zvrf->slsp_table; | |
3553 | if (!slsp_table) | |
3554 | return -1; | |
3555 | ||
e4a1ec74 | 3556 | /* Find or create LSP. */ |
d62a17ae | 3557 | tmp_ile.in_label = in_label; |
608a57c0 | 3558 | lsp = hash_get(slsp_table, &tmp_ile, lsp_alloc); |
e4a1ec74 | 3559 | |
608a57c0 MS |
3560 | nhlfe = nhlfe_find(&lsp->nhlfe_list, ZEBRA_LSP_STATIC, gtype, gate, |
3561 | ifindex); | |
3562 | if (nhlfe) { | |
3563 | struct nexthop *nh = nhlfe->nexthop; | |
3564 | ||
3565 | assert(nh); | |
3566 | assert(nh->nh_label); | |
3567 | ||
3568 | /* Compare existing nexthop */ | |
3569 | if (nh->nh_label->num_labels == 1 && | |
3570 | nh->nh_label->label[0] == out_label) | |
d62a17ae | 3571 | /* No change */ |
3572 | return 0; | |
3573 | ||
3574 | if (IS_ZEBRA_DEBUG_MPLS) { | |
608a57c0 | 3575 | nhlfe2str(nhlfe, buf, sizeof(buf)); |
d62a17ae | 3576 | zlog_debug( |
3efd0893 | 3577 | "Upd static LSP in-label %u nexthop %s out-label %u (old %u)", |
608a57c0 MS |
3578 | in_label, buf, out_label, |
3579 | nh->nh_label->label[0]); | |
3580 | } | |
3581 | if (nh->nh_label->num_labels == 1) | |
3582 | nh->nh_label->label[0] = out_label; | |
3583 | else { | |
3584 | nexthop_del_labels(nh); | |
3585 | nexthop_add_labels(nh, ZEBRA_LSP_STATIC, 1, &out_label); | |
d62a17ae | 3586 | } |
608a57c0 | 3587 | |
d62a17ae | 3588 | } else { |
3589 | /* Add static LSP entry to this nexthop */ | |
608a57c0 MS |
3590 | nhlfe = nhlfe_add(lsp, ZEBRA_LSP_STATIC, gtype, gate, |
3591 | ifindex, 1, &out_label, false /*backup*/); | |
3592 | if (!nhlfe) | |
d62a17ae | 3593 | return -1; |
3594 | ||
3595 | if (IS_ZEBRA_DEBUG_MPLS) { | |
608a57c0 | 3596 | nhlfe2str(nhlfe, buf, sizeof(buf)); |
d62a17ae | 3597 | zlog_debug( |
3598 | "Add static LSP in-label %u nexthop %s out-label %u", | |
3599 | in_label, buf, out_label); | |
3600 | } | |
3601 | } | |
3602 | ||
3603 | /* (Re)Install LSP in the main table. */ | |
5065db0a RW |
3604 | if (mpls_lsp_install(zvrf, ZEBRA_LSP_STATIC, in_label, 1, &out_label, |
3605 | gtype, gate, ifindex)) | |
d62a17ae | 3606 | return -1; |
3607 | ||
3608 | return 0; | |
7758e3f3 | 3609 | } |
3610 | ||
3611 | /* | |
3612 | * Delete static LSP entry. This may be the delete of one particular | |
3613 | * NHLFE for this incoming label or the delete of the entire entry (i.e., | |
3614 | * all NHLFEs). | |
3615 | * NOTE: Delete of the only NHLFE will also end up deleting the entire | |
3616 | * LSP configuration. | |
3617 | */ | |
d62a17ae | 3618 | int zebra_mpls_static_lsp_del(struct zebra_vrf *zvrf, mpls_label_t in_label, |
3619 | enum nexthop_types_t gtype, union g_addr *gate, | |
3620 | ifindex_t ifindex) | |
3621 | { | |
3622 | struct hash *slsp_table; | |
a7d2146a | 3623 | struct zebra_ile tmp_ile; |
8f74a383 | 3624 | struct zebra_lsp *lsp; |
f2595bd5 | 3625 | struct zebra_nhlfe *nhlfe; |
d62a17ae | 3626 | |
3627 | /* Lookup table. */ | |
3628 | slsp_table = zvrf->slsp_table; | |
3629 | if (!slsp_table) | |
3630 | return -1; | |
3631 | ||
3632 | /* If entry is not present, exit. */ | |
3633 | tmp_ile.in_label = in_label; | |
608a57c0 MS |
3634 | lsp = hash_lookup(slsp_table, &tmp_ile); |
3635 | if (!lsp) | |
d62a17ae | 3636 | return 0; |
3637 | ||
3638 | /* Is it delete of entire LSP or a specific NHLFE? */ | |
3639 | if (gtype == NEXTHOP_TYPE_BLACKHOLE) { | |
3640 | if (IS_ZEBRA_DEBUG_MPLS) | |
3641 | zlog_debug("Del static LSP in-label %u", in_label); | |
3642 | ||
3643 | /* Uninstall entire LSP from the main table. */ | |
3644 | mpls_static_lsp_uninstall_all(zvrf, in_label); | |
3645 | ||
3646 | /* Delete all static NHLFEs */ | |
608a57c0 MS |
3647 | frr_each_safe(nhlfe_list, &lsp->nhlfe_list, nhlfe) { |
3648 | nhlfe_del(nhlfe); | |
3649 | } | |
d62a17ae | 3650 | } else { |
3651 | /* Find specific NHLFE, exit if not found. */ | |
608a57c0 MS |
3652 | nhlfe = nhlfe_find(&lsp->nhlfe_list, ZEBRA_LSP_STATIC, |
3653 | gtype, gate, ifindex); | |
3654 | if (!nhlfe) | |
d62a17ae | 3655 | return 0; |
3656 | ||
3657 | if (IS_ZEBRA_DEBUG_MPLS) { | |
3658 | char buf[BUFSIZ]; | |
608a57c0 | 3659 | nhlfe2str(nhlfe, buf, sizeof(buf)); |
d62a17ae | 3660 | zlog_debug("Del static LSP in-label %u nexthop %s", |
3661 | in_label, buf); | |
3662 | } | |
3663 | ||
3664 | /* Uninstall LSP from the main table. */ | |
3665 | mpls_lsp_uninstall(zvrf, ZEBRA_LSP_STATIC, in_label, gtype, | |
cc1b9746 | 3666 | gate, ifindex, false); |
d62a17ae | 3667 | |
3668 | /* Delete static LSP NHLFE */ | |
608a57c0 | 3669 | nhlfe_del(nhlfe); |
d62a17ae | 3670 | } |
3671 | ||
3672 | /* Remove entire static LSP entry if no NHLFE - valid in either case | |
608a57c0 MS |
3673 | * above. |
3674 | */ | |
3675 | if (nhlfe_list_first(&lsp->nhlfe_list) == NULL) { | |
3676 | lsp = hash_release(slsp_table, &tmp_ile); | |
3677 | XFREE(MTYPE_LSP, lsp); | |
d62a17ae | 3678 | } |
3679 | ||
3680 | return 0; | |
7758e3f3 | 3681 | } |
3682 | ||
40c7bdb0 | 3683 | /* |
3684 | * Schedule all MPLS label forwarding entries for processing. | |
3685 | * Called upon changes that may affect one or more of them such as | |
3686 | * interface or nexthop state changes. | |
3687 | */ | |
d62a17ae | 3688 | void zebra_mpls_lsp_schedule(struct zebra_vrf *zvrf) |
40c7bdb0 | 3689 | { |
d62a17ae | 3690 | if (!zvrf) |
3691 | return; | |
3692 | hash_iterate(zvrf->lsp_table, lsp_schedule, NULL); | |
40c7bdb0 | 3693 | } |
3694 | ||
3ab18ff2 | 3695 | /* |
3696 | * Display MPLS label forwarding table for a specific LSP | |
3697 | * (VTY command handler). | |
3698 | */ | |
d62a17ae | 3699 | void zebra_mpls_print_lsp(struct vty *vty, struct zebra_vrf *zvrf, |
9f049418 | 3700 | mpls_label_t label, bool use_json) |
3ab18ff2 | 3701 | { |
d62a17ae | 3702 | struct hash *lsp_table; |
8f74a383 | 3703 | struct zebra_lsp *lsp; |
a7d2146a | 3704 | struct zebra_ile tmp_ile; |
d62a17ae | 3705 | json_object *json = NULL; |
3ab18ff2 | 3706 | |
d62a17ae | 3707 | /* Lookup table. */ |
3708 | lsp_table = zvrf->lsp_table; | |
3709 | if (!lsp_table) | |
3710 | return; | |
3ab18ff2 | 3711 | |
d62a17ae | 3712 | /* If entry is not present, exit. */ |
3713 | tmp_ile.in_label = label; | |
3714 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
3715 | if (!lsp) | |
3716 | return; | |
3ab18ff2 | 3717 | |
d62a17ae | 3718 | if (use_json) { |
3719 | json = lsp_json(lsp); | |
962af8a8 | 3720 | vty_json(vty, json); |
d62a17ae | 3721 | } else |
a29c2887 | 3722 | lsp_print(vty, lsp); |
3ab18ff2 | 3723 | } |
3724 | ||
3725 | /* | |
3726 | * Display MPLS label forwarding table (VTY command handler). | |
3727 | */ | |
d62a17ae | 3728 | void zebra_mpls_print_lsp_table(struct vty *vty, struct zebra_vrf *zvrf, |
9f049418 | 3729 | bool use_json) |
d62a17ae | 3730 | { |
3731 | char buf[BUFSIZ]; | |
3732 | json_object *json = NULL; | |
8f74a383 | 3733 | struct zebra_lsp *lsp = NULL; |
f2595bd5 | 3734 | struct zebra_nhlfe *nhlfe = NULL; |
d62a17ae | 3735 | struct listnode *node = NULL; |
3736 | struct list *lsp_list = hash_get_sorted_list(zvrf->lsp_table, lsp_cmp); | |
3737 | ||
3738 | if (use_json) { | |
3739 | json = json_object_new_object(); | |
3740 | ||
3741 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) | |
3742 | json_object_object_add( | |
43a9f66c MS |
3743 | json, label2str(lsp->ile.in_label, buf, |
3744 | sizeof(buf)), | |
d62a17ae | 3745 | lsp_json(lsp)); |
3746 | ||
962af8a8 | 3747 | vty_json(vty, json); |
d62a17ae | 3748 | } else { |
a971aeb6 RW |
3749 | struct ttable *tt; |
3750 | ||
3751 | /* Prepare table. */ | |
3752 | tt = ttable_new(&ttable_styles[TTSTYLE_BLANK]); | |
3753 | ttable_add_row(tt, "Inbound Label|Type|Nexthop|Outbound Label"); | |
3754 | tt->style.cell.rpad = 2; | |
3755 | tt->style.corner = '+'; | |
3756 | ttable_restyle(tt); | |
3757 | ttable_rowseps(tt, 0, BOTTOM, true, '-'); | |
d62a17ae | 3758 | |
3759 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) { | |
ee70f629 | 3760 | frr_each_safe(nhlfe_list, &lsp->nhlfe_list, nhlfe) { |
a971aeb6 RW |
3761 | struct nexthop *nexthop; |
3762 | const char *out_label_str; | |
3763 | char nh_buf[NEXTHOP_STRLEN]; | |
3764 | ||
d62a17ae | 3765 | nexthop = nhlfe->nexthop; |
3766 | ||
3767 | switch (nexthop->type) { | |
996c9314 | 3768 | case NEXTHOP_TYPE_IFINDEX: { |
86f07f44 | 3769 | struct zebra_ns *zns; |
b9abd9ad DS |
3770 | struct interface *ifp; |
3771 | ||
86f07f44 PG |
3772 | zns = zebra_ns_lookup(NS_DEFAULT); |
3773 | ifp = if_lookup_by_index_per_ns( | |
a971aeb6 RW |
3774 | zns, nexthop->ifindex); |
3775 | snprintf(nh_buf, sizeof(nh_buf), "%s", | |
3776 | ifp ? ifp->name : "Null"); | |
b9abd9ad DS |
3777 | break; |
3778 | } | |
d62a17ae | 3779 | case NEXTHOP_TYPE_IPV4: |
3780 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
a971aeb6 RW |
3781 | inet_ntop(AF_INET, &nexthop->gate.ipv4, |
3782 | nh_buf, sizeof(nh_buf)); | |
d62a17ae | 3783 | break; |
3784 | case NEXTHOP_TYPE_IPV6: | |
3785 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
a971aeb6 RW |
3786 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, |
3787 | nh_buf, sizeof(nh_buf)); | |
d62a17ae | 3788 | break; |
10cc80ca | 3789 | case NEXTHOP_TYPE_BLACKHOLE: |
d62a17ae | 3790 | break; |
3791 | } | |
3792 | ||
b9abd9ad | 3793 | if (nexthop->type != NEXTHOP_TYPE_IFINDEX) |
a971aeb6 RW |
3794 | out_label_str = mpls_label2str( |
3795 | nexthop->nh_label->num_labels, | |
3796 | &nexthop->nh_label->label[0], | |
43a9f66c | 3797 | buf, sizeof(buf), 1); |
b9abd9ad | 3798 | else |
a971aeb6 RW |
3799 | out_label_str = "-"; |
3800 | ||
3801 | ttable_add_row(tt, "%u|%s|%s|%s", | |
3802 | lsp->ile.in_label, | |
3803 | nhlfe_type2str(nhlfe->type), | |
3804 | nh_buf, out_label_str); | |
d62a17ae | 3805 | } |
3806 | } | |
3807 | ||
a971aeb6 RW |
3808 | /* Dump the generated table. */ |
3809 | if (tt->nrows > 1) { | |
3810 | char *table = ttable_dump(tt, "\n"); | |
3811 | vty_out(vty, "%s\n", table); | |
3812 | XFREE(MTYPE_TMP, table); | |
3813 | } | |
3814 | ttable_del(tt); | |
d62a17ae | 3815 | } |
3816 | ||
6a154c88 | 3817 | list_delete(&lsp_list); |
3ab18ff2 | 3818 | } |
3819 | ||
608a57c0 MS |
3820 | /* |
3821 | * Create printable string for static LSP configuration. | |
3822 | */ | |
f2595bd5 DS |
3823 | static char *nhlfe_config_str(const struct zebra_nhlfe *nhlfe, char *buf, |
3824 | int size) | |
608a57c0 MS |
3825 | { |
3826 | const struct nexthop *nh; | |
3827 | ||
3828 | nh = nhlfe->nexthop; | |
3829 | ||
3830 | buf[0] = '\0'; | |
3831 | switch (nh->type) { | |
3832 | case NEXTHOP_TYPE_IPV4: | |
10cc80ca | 3833 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
608a57c0 | 3834 | inet_ntop(AF_INET, &nh->gate.ipv4, buf, size); |
10cc80ca DS |
3835 | if (nh->ifindex) |
3836 | strlcat(buf, ifindex2ifname(nh->ifindex, VRF_DEFAULT), | |
3837 | size); | |
608a57c0 MS |
3838 | break; |
3839 | case NEXTHOP_TYPE_IPV6: | |
3840 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
3841 | inet_ntop(AF_INET6, &nh->gate.ipv6, buf, size); | |
3842 | if (nh->ifindex) | |
3843 | strlcat(buf, | |
3844 | ifindex2ifname(nh->ifindex, VRF_DEFAULT), | |
3845 | size); | |
3846 | break; | |
10cc80ca | 3847 | case NEXTHOP_TYPE_IFINDEX: |
a44e3106 MS |
3848 | if (nh->ifindex) |
3849 | strlcat(buf, | |
3850 | ifindex2ifname(nh->ifindex, VRF_DEFAULT), | |
3851 | size); | |
3852 | break; | |
3853 | case NEXTHOP_TYPE_BLACKHOLE: | |
608a57c0 MS |
3854 | break; |
3855 | } | |
3856 | ||
3857 | return buf; | |
3858 | } | |
3859 | ||
7758e3f3 | 3860 | /* |
3861 | * Display MPLS LSP configuration of all static LSPs (VTY command handler). | |
3862 | */ | |
d62a17ae | 3863 | int zebra_mpls_write_lsp_config(struct vty *vty, struct zebra_vrf *zvrf) |
3864 | { | |
8f74a383 | 3865 | struct zebra_lsp *lsp; |
f2595bd5 | 3866 | struct zebra_nhlfe *nhlfe; |
608a57c0 | 3867 | struct nexthop *nh; |
d62a17ae | 3868 | struct listnode *node; |
3869 | struct list *slsp_list = | |
608a57c0 | 3870 | hash_get_sorted_list(zvrf->slsp_table, lsp_cmp); |
d62a17ae | 3871 | |
608a57c0 MS |
3872 | for (ALL_LIST_ELEMENTS_RO(slsp_list, node, lsp)) { |
3873 | frr_each(nhlfe_list, &lsp->nhlfe_list, nhlfe) { | |
0af35d90 | 3874 | char buf[BUFSIZ]; |
d62a17ae | 3875 | char lstr[30]; |
3876 | ||
608a57c0 MS |
3877 | nh = nhlfe->nexthop; |
3878 | if (nh == NULL || nh->nh_label == NULL) | |
3879 | continue; | |
3880 | ||
3881 | nhlfe_config_str(nhlfe, buf, sizeof(buf)); | |
3882 | ||
3883 | switch (nh->nh_label->label[0]) { | |
70e98a7f DS |
3884 | case MPLS_LABEL_IPV4_EXPLICIT_NULL: |
3885 | case MPLS_LABEL_IPV6_EXPLICIT_NULL: | |
d62a17ae | 3886 | strlcpy(lstr, "explicit-null", sizeof(lstr)); |
3887 | break; | |
70e98a7f | 3888 | case MPLS_LABEL_IMPLICIT_NULL: |
d62a17ae | 3889 | strlcpy(lstr, "implicit-null", sizeof(lstr)); |
3890 | break; | |
3891 | default: | |
772270f3 | 3892 | snprintf(lstr, sizeof(lstr), "%u", |
608a57c0 | 3893 | nh->nh_label->label[0]); |
d62a17ae | 3894 | break; |
3895 | } | |
3896 | ||
608a57c0 | 3897 | vty_out(vty, "mpls lsp %u %s %s\n", lsp->ile.in_label, |
d62a17ae | 3898 | buf, lstr); |
3899 | } | |
3900 | } | |
b78b820d | 3901 | |
6a154c88 | 3902 | list_delete(&slsp_list); |
d62a17ae | 3903 | return (zvrf->slsp_table->count ? 1 : 0); |
7758e3f3 | 3904 | } |
3905 | ||
1b6d5c7e VV |
3906 | /* |
3907 | * Add/update global label block. | |
3908 | */ | |
d7c0a89a QY |
3909 | int zebra_mpls_label_block_add(struct zebra_vrf *zvrf, uint32_t start_label, |
3910 | uint32_t end_label) | |
1b6d5c7e | 3911 | { |
d62a17ae | 3912 | zvrf->mpls_srgb.start_label = start_label; |
3913 | zvrf->mpls_srgb.end_label = end_label; | |
28d58fd7 | 3914 | |
d62a17ae | 3915 | /* Evaluate registered FECs to see if any get a label or not. */ |
3916 | fec_evaluate(zvrf); | |
3917 | return 0; | |
1b6d5c7e VV |
3918 | } |
3919 | ||
3920 | /* | |
3921 | * Delete global label block. | |
3922 | */ | |
d62a17ae | 3923 | int zebra_mpls_label_block_del(struct zebra_vrf *zvrf) |
1b6d5c7e | 3924 | { |
d62a17ae | 3925 | zvrf->mpls_srgb.start_label = MPLS_DEFAULT_MIN_SRGB_LABEL; |
3926 | zvrf->mpls_srgb.end_label = MPLS_DEFAULT_MAX_SRGB_LABEL; | |
28d58fd7 | 3927 | |
d62a17ae | 3928 | /* Process registered FECs to clear their local label, if needed. */ |
3929 | fec_evaluate(zvrf); | |
3930 | return 0; | |
1b6d5c7e VV |
3931 | } |
3932 | ||
3933 | /* | |
3934 | * Display MPLS global label block configuration (VTY command handler). | |
3935 | */ | |
d62a17ae | 3936 | int zebra_mpls_write_label_block_config(struct vty *vty, struct zebra_vrf *zvrf) |
1b6d5c7e | 3937 | { |
d62a17ae | 3938 | if (zvrf->mpls_srgb.start_label == 0) |
3939 | return 0; | |
1b6d5c7e | 3940 | |
d62a17ae | 3941 | if ((zvrf->mpls_srgb.start_label != MPLS_DEFAULT_MIN_SRGB_LABEL) |
3942 | || (zvrf->mpls_srgb.end_label != MPLS_DEFAULT_MAX_SRGB_LABEL)) { | |
3943 | vty_out(vty, "mpls label global-block %u %u\n", | |
3944 | zvrf->mpls_srgb.start_label, zvrf->mpls_srgb.end_label); | |
3945 | } | |
1b6d5c7e | 3946 | |
d62a17ae | 3947 | return 1; |
1b6d5c7e VV |
3948 | } |
3949 | ||
84915b0a | 3950 | /* |
3951 | * Called when VRF becomes inactive, cleans up information but keeps | |
3952 | * the table itself. | |
84915b0a | 3953 | */ |
3954 | void zebra_mpls_cleanup_tables(struct zebra_vrf *zvrf) | |
3955 | { | |
c2e10644 MS |
3956 | struct zebra_vrf *def_zvrf; |
3957 | afi_t afi; | |
3958 | ||
3959 | if (zvrf_id(zvrf) == VRF_DEFAULT) | |
3960 | hash_iterate(zvrf->lsp_table, lsp_uninstall_from_kernel, NULL); | |
3961 | else { | |
3962 | /* | |
3963 | * For other vrfs, we try to remove associated LSPs; we locate | |
3964 | * the LSPs in the default vrf. | |
3965 | */ | |
3966 | def_zvrf = zebra_vrf_lookup_by_id(VRF_DEFAULT); | |
3967 | ||
3968 | /* At shutdown, the default may be gone already */ | |
3969 | if (def_zvrf == NULL) | |
3970 | return; | |
3971 | ||
3972 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
3973 | if (zvrf->label[afi] != MPLS_LABEL_NONE) | |
3974 | lsp_uninstall(def_zvrf, zvrf->label[afi]); | |
3975 | } | |
3976 | } | |
84915b0a | 3977 | } |
3978 | ||
06302ecb DS |
3979 | /* |
3980 | * When a vrf label is assigned and the client goes away | |
3981 | * we should cleanup the vrf labels associated with | |
3982 | * that zclient. | |
3983 | */ | |
3984 | void zebra_mpls_client_cleanup_vrf_label(uint8_t proto) | |
3985 | { | |
3986 | struct vrf *vrf; | |
3987 | struct zebra_vrf *def_zvrf = zebra_vrf_lookup_by_id(VRF_DEFAULT); | |
3988 | ||
3989 | if (def_zvrf == NULL) | |
3990 | return; | |
3991 | ||
3992 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { | |
3993 | struct zebra_vrf *zvrf = vrf->info; | |
3994 | afi_t afi; | |
3995 | ||
3996 | if (!zvrf) | |
3997 | continue; | |
3998 | ||
3999 | for (afi = AFI_IP; afi < AFI_MAX; afi++) { | |
4000 | if (zvrf->label_proto[afi] == proto | |
4001 | && zvrf->label[afi] != MPLS_LABEL_NONE) | |
4002 | lsp_uninstall(def_zvrf, zvrf->label[afi]); | |
4003 | ||
4004 | /* | |
4005 | * Cleanup data structures by fiat | |
4006 | */ | |
4007 | zvrf->label_proto[afi] = 0; | |
4008 | zvrf->label[afi] = MPLS_LABEL_NONE; | |
4009 | } | |
4010 | } | |
4011 | } | |
4012 | ||
40c7bdb0 | 4013 | /* |
4014 | * Called upon process exiting, need to delete LSP forwarding | |
4015 | * entries from the kernel. | |
4016 | * NOTE: Currently supported only for default VRF. | |
4017 | */ | |
d62a17ae | 4018 | void zebra_mpls_close_tables(struct zebra_vrf *zvrf) |
40c7bdb0 | 4019 | { |
d62a17ae | 4020 | hash_iterate(zvrf->lsp_table, lsp_uninstall_from_kernel, NULL); |
4021 | hash_clean(zvrf->lsp_table, NULL); | |
4022 | hash_free(zvrf->lsp_table); | |
4023 | hash_clean(zvrf->slsp_table, NULL); | |
4024 | hash_free(zvrf->slsp_table); | |
9b67b514 DS |
4025 | route_table_finish(zvrf->fec_table[AFI_IP]); |
4026 | route_table_finish(zvrf->fec_table[AFI_IP6]); | |
40c7bdb0 | 4027 | } |
4028 | ||
7758e3f3 | 4029 | /* |
4030 | * Allocate MPLS tables for this VRF and do other initialization. | |
4031 | * NOTE: Currently supported only for default VRF. | |
4032 | */ | |
d62a17ae | 4033 | void zebra_mpls_init_tables(struct zebra_vrf *zvrf) |
7758e3f3 | 4034 | { |
4a73887e DS |
4035 | char buffer[80]; |
4036 | ||
d62a17ae | 4037 | if (!zvrf) |
4038 | return; | |
4a73887e DS |
4039 | |
4040 | snprintf(buffer, sizeof(buffer), "ZEBRA SLSP table: %s", | |
4041 | zvrf->vrf->name); | |
e2071325 | 4042 | zvrf->slsp_table = hash_create_size(8, label_hash, label_cmp, buffer); |
4a73887e DS |
4043 | |
4044 | snprintf(buffer, sizeof(buffer), "ZEBRA LSP table: %s", | |
4045 | zvrf->vrf->name); | |
4046 | zvrf->lsp_table = hash_create_size(8, label_hash, label_cmp, buffer); | |
d62a17ae | 4047 | zvrf->fec_table[AFI_IP] = route_table_init(); |
4048 | zvrf->fec_table[AFI_IP6] = route_table_init(); | |
4049 | zvrf->mpls_flags = 0; | |
4050 | zvrf->mpls_srgb.start_label = MPLS_DEFAULT_MIN_SRGB_LABEL; | |
4051 | zvrf->mpls_srgb.end_label = MPLS_DEFAULT_MAX_SRGB_LABEL; | |
7758e3f3 | 4052 | } |
4053 | ||
4054 | /* | |
4055 | * Global MPLS initialization. | |
4056 | */ | |
d62a17ae | 4057 | void zebra_mpls_init(void) |
7758e3f3 | 4058 | { |
d62a17ae | 4059 | mpls_enabled = 0; |
6fb35808 | 4060 | mpls_pw_reach_strict = false; |
33c32282 | 4061 | |
d62a17ae | 4062 | if (mpls_kernel_init() < 0) { |
e914ccbe | 4063 | flog_warn(EC_ZEBRA_MPLS_SUPPORT_DISABLED, |
9df414fe | 4064 | "Disabling MPLS support (no kernel support)"); |
d62a17ae | 4065 | return; |
4066 | } | |
fe6c7157 | 4067 | |
2561d12e | 4068 | if (!mpls_processq_init()) |
d62a17ae | 4069 | mpls_enabled = 1; |
453844ab | 4070 | |
21ccc0cf | 4071 | hook_register(zserv_client_close, zebra_mpls_cleanup_fecs_for_client); |
651105b5 | 4072 | hook_register(zserv_client_close, zebra_mpls_cleanup_zclient_labels); |
7758e3f3 | 4073 | } |