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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 | * | |
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 | |
19 | */ | |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "prefix.h" | |
24 | #include "table.h" | |
25 | #include "memory.h" | |
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" | |
37 | #include "lib/json.h" | |
38 | ||
39 | #include "zebra/rib.h" | |
40 | #include "zebra/rt.h" | |
41 | #include "zebra/interface.h" | |
42 | #include "zebra/zserv.h" | |
43 | #include "zebra/redistribute.h" | |
44 | #include "zebra/debug.h" | |
45 | #include "zebra/zebra_memory.h" | |
46 | #include "zebra/zebra_vrf.h" | |
47 | #include "zebra/zebra_mpls.h" | |
48 | #include "zebra/zebra_errors.h" | |
49 | ||
50 | DEFINE_MTYPE_STATIC(ZEBRA, LSP, "MPLS LSP object") | |
51 | DEFINE_MTYPE_STATIC(ZEBRA, FEC, "MPLS FEC object") | |
52 | DEFINE_MTYPE_STATIC(ZEBRA, SLSP, "MPLS static LSP config") | |
53 | DEFINE_MTYPE_STATIC(ZEBRA, NHLFE, "MPLS nexthop object") | |
54 | DEFINE_MTYPE_STATIC(ZEBRA, SNHLFE, "MPLS static nexthop object") | |
55 | DEFINE_MTYPE_STATIC(ZEBRA, SNHLFE_IFNAME, "MPLS static nexthop ifname") | |
56 | ||
57 | int mpls_enabled; | |
58 | ||
59 | /* Default rtm_table for all clients */ | |
60 | extern struct zebra_t zebrad; | |
61 | ||
62 | /* static function declarations */ | |
63 | ||
64 | static void fec_evaluate(struct zebra_vrf *zvrf); | |
65 | static uint32_t fec_derive_label_from_index(struct zebra_vrf *vrf, | |
66 | zebra_fec_t *fec); | |
67 | static int lsp_install(struct zebra_vrf *zvrf, mpls_label_t label, | |
68 | struct route_node *rn, struct route_entry *re); | |
69 | static int lsp_uninstall(struct zebra_vrf *zvrf, mpls_label_t label); | |
70 | static int fec_change_update_lsp(struct zebra_vrf *zvrf, zebra_fec_t *fec, | |
71 | mpls_label_t old_label); | |
72 | static int fec_send(zebra_fec_t *fec, struct zserv *client); | |
73 | static void fec_update_clients(zebra_fec_t *fec); | |
74 | static void fec_print(zebra_fec_t *fec, struct vty *vty); | |
75 | static zebra_fec_t *fec_find(struct route_table *table, struct prefix *p); | |
76 | static zebra_fec_t *fec_add(struct route_table *table, struct prefix *p, | |
77 | mpls_label_t label, uint32_t flags, | |
78 | uint32_t label_index); | |
79 | static int fec_del(zebra_fec_t *fec); | |
80 | ||
81 | static unsigned int label_hash(void *p); | |
82 | static bool label_cmp(const void *p1, const void *p2); | |
83 | static int nhlfe_nexthop_active_ipv4(zebra_nhlfe_t *nhlfe, | |
84 | struct nexthop *nexthop); | |
85 | static int nhlfe_nexthop_active_ipv6(zebra_nhlfe_t *nhlfe, | |
86 | struct nexthop *nexthop); | |
87 | static int nhlfe_nexthop_active(zebra_nhlfe_t *nhlfe); | |
88 | ||
89 | static void lsp_select_best_nhlfe(zebra_lsp_t *lsp); | |
90 | static void lsp_uninstall_from_kernel(struct hash_backet *backet, void *ctxt); | |
91 | static void lsp_schedule(struct hash_backet *backet, void *ctxt); | |
92 | static wq_item_status lsp_process(struct work_queue *wq, void *data); | |
93 | static void lsp_processq_del(struct work_queue *wq, void *data); | |
94 | static void lsp_processq_complete(struct work_queue *wq); | |
95 | static int lsp_processq_add(zebra_lsp_t *lsp); | |
96 | static void *lsp_alloc(void *p); | |
97 | ||
98 | static char *nhlfe2str(zebra_nhlfe_t *nhlfe, char *buf, int size); | |
99 | static int nhlfe_nhop_match(zebra_nhlfe_t *nhlfe, enum nexthop_types_t gtype, | |
100 | union g_addr *gate, ifindex_t ifindex); | |
101 | static zebra_nhlfe_t *nhlfe_find(zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
102 | enum nexthop_types_t gtype, union g_addr *gate, | |
103 | ifindex_t ifindex); | |
104 | static zebra_nhlfe_t *nhlfe_add(zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
105 | enum nexthop_types_t gtype, union g_addr *gate, | |
106 | ifindex_t ifindex, mpls_label_t out_label); | |
107 | static int nhlfe_del(zebra_nhlfe_t *snhlfe); | |
108 | static void nhlfe_out_label_update(zebra_nhlfe_t *nhlfe, | |
109 | struct mpls_label_stack *nh_label); | |
110 | static int mpls_lsp_uninstall_all(struct hash *lsp_table, zebra_lsp_t *lsp, | |
111 | enum lsp_types_t type); | |
112 | static int mpls_static_lsp_uninstall_all(struct zebra_vrf *zvrf, | |
113 | mpls_label_t in_label); | |
114 | static void nhlfe_print(zebra_nhlfe_t *nhlfe, struct vty *vty); | |
115 | static void lsp_print(zebra_lsp_t *lsp, void *ctxt); | |
116 | static void *slsp_alloc(void *p); | |
117 | static int snhlfe_match(zebra_snhlfe_t *snhlfe, enum nexthop_types_t gtype, | |
118 | union g_addr *gate, ifindex_t ifindex); | |
119 | static zebra_snhlfe_t *snhlfe_find(zebra_slsp_t *slsp, | |
120 | enum nexthop_types_t gtype, | |
121 | union g_addr *gate, ifindex_t ifindex); | |
122 | static zebra_snhlfe_t *snhlfe_add(zebra_slsp_t *slsp, | |
123 | enum nexthop_types_t gtype, | |
124 | union g_addr *gate, ifindex_t ifindex, | |
125 | mpls_label_t out_label); | |
126 | static int snhlfe_del(zebra_snhlfe_t *snhlfe); | |
127 | static int snhlfe_del_all(zebra_slsp_t *slsp); | |
128 | static char *snhlfe2str(zebra_snhlfe_t *snhlfe, char *buf, int size); | |
129 | static int mpls_processq_init(struct zebra_t *zebra); | |
130 | ||
131 | ||
132 | /* Static functions */ | |
133 | ||
134 | /* | |
135 | * Handle failure in LSP install, clear flags for NHLFE. | |
136 | */ | |
137 | static void clear_nhlfe_installed(zebra_lsp_t *lsp) | |
138 | { | |
139 | zebra_nhlfe_t *nhlfe; | |
140 | struct nexthop *nexthop; | |
141 | ||
142 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
143 | nexthop = nhlfe->nexthop; | |
144 | if (!nexthop) | |
145 | continue; | |
146 | ||
147 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
148 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
149 | } | |
150 | } | |
151 | ||
152 | /* | |
153 | * Install label forwarding entry based on labeled-route entry. | |
154 | */ | |
155 | static int lsp_install(struct zebra_vrf *zvrf, mpls_label_t label, | |
156 | struct route_node *rn, struct route_entry *re) | |
157 | { | |
158 | struct hash *lsp_table; | |
159 | zebra_ile_t tmp_ile; | |
160 | zebra_lsp_t *lsp; | |
161 | zebra_nhlfe_t *nhlfe; | |
162 | struct nexthop *nexthop; | |
163 | enum lsp_types_t lsp_type; | |
164 | char buf[BUFSIZ]; | |
165 | int added, changed; | |
166 | ||
167 | /* Lookup table. */ | |
168 | lsp_table = zvrf->lsp_table; | |
169 | if (!lsp_table) | |
170 | return -1; | |
171 | ||
172 | lsp_type = lsp_type_from_re_type(re->type); | |
173 | added = changed = 0; | |
174 | ||
175 | /* Locate or allocate LSP entry. */ | |
176 | tmp_ile.in_label = label; | |
177 | lsp = hash_get(lsp_table, &tmp_ile, lsp_alloc); | |
178 | if (!lsp) | |
179 | return -1; | |
180 | ||
181 | /* For each active nexthop, create NHLFE. Note that we deliberately skip | |
182 | * recursive nexthops right now, because intermediate hops won't | |
183 | * understand | |
184 | * the label advertised by the recursive nexthop (plus we don't have the | |
185 | * logic yet to push multiple labels). | |
186 | */ | |
187 | for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) { | |
188 | /* Skip inactive and recursive entries. */ | |
189 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
190 | continue; | |
191 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
192 | continue; | |
193 | ||
194 | nhlfe = nhlfe_find(lsp, lsp_type, nexthop->type, &nexthop->gate, | |
195 | nexthop->ifindex); | |
196 | if (nhlfe) { | |
197 | /* Clear deleted flag (in case it was set) */ | |
198 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
199 | if (nexthop_labels_match(nhlfe->nexthop, nexthop)) | |
200 | /* No change */ | |
201 | continue; | |
202 | ||
203 | ||
204 | if (IS_ZEBRA_DEBUG_MPLS) { | |
205 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
206 | zlog_debug( | |
207 | "LSP in-label %u type %d nexthop %s " | |
208 | "out-label changed", | |
209 | lsp->ile.in_label, lsp_type, buf); | |
210 | } | |
211 | ||
212 | /* Update out label, trigger processing. */ | |
213 | nhlfe_out_label_update(nhlfe, nexthop->nh_label); | |
214 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
215 | changed++; | |
216 | } else { | |
217 | /* Add LSP entry to this nexthop */ | |
218 | nhlfe = nhlfe_add(lsp, lsp_type, nexthop->type, | |
219 | &nexthop->gate, nexthop->ifindex, | |
220 | nexthop->nh_label->label[0]); | |
221 | if (!nhlfe) | |
222 | return -1; | |
223 | ||
224 | if (IS_ZEBRA_DEBUG_MPLS) { | |
225 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
226 | zlog_debug( | |
227 | "Add LSP in-label %u type %d nexthop %s " | |
228 | "out-label %u", | |
229 | lsp->ile.in_label, lsp_type, buf, | |
230 | nexthop->nh_label->label[0]); | |
231 | } | |
232 | ||
233 | lsp->addr_family = NHLFE_FAMILY(nhlfe); | |
234 | ||
235 | /* Mark NHLFE as changed. */ | |
236 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
237 | added++; | |
238 | } | |
239 | } | |
240 | ||
241 | /* Queue LSP for processing if necessary. If no NHLFE got added (special | |
242 | * case), delete the LSP entry; this case results in somewhat ugly | |
243 | * logging. | |
244 | */ | |
245 | if (added || changed) { | |
246 | if (lsp_processq_add(lsp)) | |
247 | return -1; | |
248 | } else if (!lsp->nhlfe_list | |
249 | && !CHECK_FLAG(lsp->flags, LSP_FLAG_SCHEDULED)) { | |
250 | if (IS_ZEBRA_DEBUG_MPLS) | |
251 | zlog_debug("Free LSP in-label %u flags 0x%x", | |
252 | lsp->ile.in_label, lsp->flags); | |
253 | ||
254 | lsp = hash_release(lsp_table, &lsp->ile); | |
255 | if (lsp) | |
256 | XFREE(MTYPE_LSP, lsp); | |
257 | } | |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
262 | /* | |
263 | * Uninstall all non-static NHLFEs of a label forwarding entry. If all | |
264 | * NHLFEs are removed, the entire entry is deleted. | |
265 | */ | |
266 | static int lsp_uninstall(struct zebra_vrf *zvrf, mpls_label_t label) | |
267 | { | |
268 | struct hash *lsp_table; | |
269 | zebra_ile_t tmp_ile; | |
270 | zebra_lsp_t *lsp; | |
271 | zebra_nhlfe_t *nhlfe, *nhlfe_next; | |
272 | char buf[BUFSIZ]; | |
273 | ||
274 | /* Lookup table. */ | |
275 | lsp_table = zvrf->lsp_table; | |
276 | if (!lsp_table) | |
277 | return -1; | |
278 | ||
279 | /* If entry is not present, exit. */ | |
280 | tmp_ile.in_label = label; | |
281 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
282 | if (!lsp || !lsp->nhlfe_list) | |
283 | return 0; | |
284 | ||
285 | /* Mark NHLFEs for delete or directly delete, as appropriate. */ | |
286 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe_next) { | |
287 | nhlfe_next = nhlfe->next; | |
288 | ||
289 | /* Skip static NHLFEs */ | |
290 | if (nhlfe->type == ZEBRA_LSP_STATIC) | |
291 | continue; | |
292 | ||
293 | if (IS_ZEBRA_DEBUG_MPLS) { | |
294 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
295 | zlog_debug( | |
296 | "Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
297 | label, nhlfe->type, buf, nhlfe->flags); | |
298 | } | |
299 | ||
300 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED)) { | |
301 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
302 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
303 | } else { | |
304 | nhlfe_del(nhlfe); | |
305 | } | |
306 | } | |
307 | ||
308 | /* Queue LSP for processing, if needed, else delete. */ | |
309 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) { | |
310 | if (lsp_processq_add(lsp)) | |
311 | return -1; | |
312 | } else if (!lsp->nhlfe_list | |
313 | && !CHECK_FLAG(lsp->flags, LSP_FLAG_SCHEDULED)) { | |
314 | if (IS_ZEBRA_DEBUG_MPLS) | |
315 | zlog_debug("Del LSP in-label %u flags 0x%x", | |
316 | lsp->ile.in_label, lsp->flags); | |
317 | ||
318 | lsp = hash_release(lsp_table, &lsp->ile); | |
319 | if (lsp) | |
320 | XFREE(MTYPE_LSP, lsp); | |
321 | } | |
322 | ||
323 | return 0; | |
324 | } | |
325 | ||
326 | /* | |
327 | * This function is invoked upon change to label block configuration; it | |
328 | * will walk all registered FECs with label-index and appropriately update | |
329 | * their local labels and trigger client updates. | |
330 | */ | |
331 | static void fec_evaluate(struct zebra_vrf *zvrf) | |
332 | { | |
333 | struct route_node *rn; | |
334 | zebra_fec_t *fec; | |
335 | uint32_t old_label, new_label; | |
336 | int af; | |
337 | char buf[BUFSIZ]; | |
338 | ||
339 | for (af = AFI_IP; af < AFI_MAX; af++) { | |
340 | if (zvrf->fec_table[af] == NULL) | |
341 | continue; | |
342 | ||
343 | for (rn = route_top(zvrf->fec_table[af]); rn; | |
344 | rn = route_next(rn)) { | |
345 | if ((fec = rn->info) == NULL) | |
346 | continue; | |
347 | ||
348 | /* Skip configured FECs and those without a label index. | |
349 | */ | |
350 | if (fec->flags & FEC_FLAG_CONFIGURED | |
351 | || fec->label_index == MPLS_INVALID_LABEL_INDEX) | |
352 | continue; | |
353 | ||
354 | if (IS_ZEBRA_DEBUG_MPLS) | |
355 | prefix2str(&rn->p, buf, BUFSIZ); | |
356 | ||
357 | /* Save old label, determine new label. */ | |
358 | old_label = fec->label; | |
359 | new_label = | |
360 | zvrf->mpls_srgb.start_label + fec->label_index; | |
361 | if (new_label >= zvrf->mpls_srgb.end_label) | |
362 | new_label = MPLS_INVALID_LABEL; | |
363 | ||
364 | /* If label has changed, update FEC and clients. */ | |
365 | if (new_label == old_label) | |
366 | continue; | |
367 | ||
368 | if (IS_ZEBRA_DEBUG_MPLS) | |
369 | zlog_debug( | |
370 | "Update fec %s new label %u upon label block", | |
371 | buf, new_label); | |
372 | ||
373 | fec->label = new_label; | |
374 | fec_update_clients(fec); | |
375 | ||
376 | /* Update label forwarding entries appropriately */ | |
377 | fec_change_update_lsp(zvrf, fec, old_label); | |
378 | } | |
379 | } | |
380 | } | |
381 | ||
382 | /* | |
383 | * Derive (if possible) and update the local label for the FEC based on | |
384 | * its label index. The index is "acceptable" if it falls within the | |
385 | * globally configured label block (SRGB). | |
386 | */ | |
387 | static uint32_t fec_derive_label_from_index(struct zebra_vrf *zvrf, | |
388 | zebra_fec_t *fec) | |
389 | { | |
390 | uint32_t label; | |
391 | ||
392 | if (fec->label_index != MPLS_INVALID_LABEL_INDEX | |
393 | && zvrf->mpls_srgb.start_label | |
394 | && ((label = zvrf->mpls_srgb.start_label + fec->label_index) | |
395 | < zvrf->mpls_srgb.end_label)) | |
396 | fec->label = label; | |
397 | else | |
398 | fec->label = MPLS_INVALID_LABEL; | |
399 | ||
400 | return fec->label; | |
401 | } | |
402 | ||
403 | /* | |
404 | * There is a change for this FEC. Install or uninstall label forwarding | |
405 | * entries, as appropriate. | |
406 | */ | |
407 | static int fec_change_update_lsp(struct zebra_vrf *zvrf, zebra_fec_t *fec, | |
408 | mpls_label_t old_label) | |
409 | { | |
410 | struct route_table *table; | |
411 | struct route_node *rn; | |
412 | struct route_entry *re; | |
413 | afi_t afi; | |
414 | ||
415 | /* Uninstall label forwarding entry, if previously installed. */ | |
416 | if (old_label != MPLS_INVALID_LABEL | |
417 | && old_label != MPLS_LABEL_IMPLICIT_NULL) | |
418 | lsp_uninstall(zvrf, old_label); | |
419 | ||
420 | /* Install label forwarding entry corr. to new label, if needed. */ | |
421 | if (fec->label == MPLS_INVALID_LABEL | |
422 | || fec->label == MPLS_LABEL_IMPLICIT_NULL) | |
423 | return 0; | |
424 | ||
425 | afi = family2afi(PREFIX_FAMILY(&fec->rn->p)); | |
426 | table = zebra_vrf_table(afi, SAFI_UNICAST, zvrf_id(zvrf)); | |
427 | if (!table) | |
428 | return 0; | |
429 | ||
430 | /* See if labeled route exists. */ | |
431 | rn = route_node_lookup(table, &fec->rn->p); | |
432 | if (!rn) | |
433 | return 0; | |
434 | ||
435 | RNODE_FOREACH_RE (rn, re) { | |
436 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) | |
437 | break; | |
438 | } | |
439 | ||
440 | if (!re || !zebra_rib_labeled_unicast(re)) | |
441 | return 0; | |
442 | ||
443 | if (lsp_install(zvrf, fec->label, rn, re)) | |
444 | return -1; | |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
449 | /* | |
450 | * Inform about FEC to a registered client. | |
451 | */ | |
452 | static int fec_send(zebra_fec_t *fec, struct zserv *client) | |
453 | { | |
454 | struct stream *s; | |
455 | struct route_node *rn; | |
456 | ||
457 | rn = fec->rn; | |
458 | ||
459 | /* Get output stream. */ | |
460 | s = stream_new(ZEBRA_MAX_PACKET_SIZ); | |
461 | ||
462 | zclient_create_header(s, ZEBRA_FEC_UPDATE, VRF_DEFAULT); | |
463 | ||
464 | stream_putw(s, rn->p.family); | |
465 | stream_put_prefix(s, &rn->p); | |
466 | stream_putl(s, fec->label); | |
467 | stream_putw_at(s, 0, stream_get_endp(s)); | |
468 | return zserv_send_message(client, s); | |
469 | } | |
470 | ||
471 | /* | |
472 | * Update all registered clients about this FEC. Caller should've updated | |
473 | * FEC and ensure no duplicate updates. | |
474 | */ | |
475 | static void fec_update_clients(zebra_fec_t *fec) | |
476 | { | |
477 | struct listnode *node; | |
478 | struct zserv *client; | |
479 | ||
480 | for (ALL_LIST_ELEMENTS_RO(fec->client_list, node, client)) { | |
481 | if (IS_ZEBRA_DEBUG_MPLS) | |
482 | zlog_debug("Update client %s", | |
483 | zebra_route_string(client->proto)); | |
484 | fec_send(fec, client); | |
485 | } | |
486 | } | |
487 | ||
488 | ||
489 | /* | |
490 | * Print a FEC-label binding entry. | |
491 | */ | |
492 | static void fec_print(zebra_fec_t *fec, struct vty *vty) | |
493 | { | |
494 | struct route_node *rn; | |
495 | struct listnode *node; | |
496 | struct zserv *client; | |
497 | char buf[BUFSIZ]; | |
498 | ||
499 | rn = fec->rn; | |
500 | prefix2str(&rn->p, buf, BUFSIZ); | |
501 | vty_out(vty, "%s\n", buf); | |
502 | vty_out(vty, " Label: %s", label2str(fec->label, buf, BUFSIZ)); | |
503 | if (fec->label_index != MPLS_INVALID_LABEL_INDEX) | |
504 | vty_out(vty, ", Label Index: %u", fec->label_index); | |
505 | vty_out(vty, "\n"); | |
506 | if (!list_isempty(fec->client_list)) { | |
507 | vty_out(vty, " Client list:"); | |
508 | for (ALL_LIST_ELEMENTS_RO(fec->client_list, node, client)) | |
509 | vty_out(vty, " %s(fd %d)", | |
510 | zebra_route_string(client->proto), | |
511 | client->sock); | |
512 | vty_out(vty, "\n"); | |
513 | } | |
514 | } | |
515 | ||
516 | /* | |
517 | * Locate FEC-label binding that matches with passed info. | |
518 | */ | |
519 | static zebra_fec_t *fec_find(struct route_table *table, struct prefix *p) | |
520 | { | |
521 | struct route_node *rn; | |
522 | ||
523 | apply_mask(p); | |
524 | rn = route_node_lookup(table, p); | |
525 | if (!rn) | |
526 | return NULL; | |
527 | ||
528 | route_unlock_node(rn); | |
529 | return (rn->info); | |
530 | } | |
531 | ||
532 | /* | |
533 | * Add a FEC. This may be upon a client registering for a binding | |
534 | * or when a binding is configured. | |
535 | */ | |
536 | static zebra_fec_t *fec_add(struct route_table *table, struct prefix *p, | |
537 | mpls_label_t label, uint32_t flags, | |
538 | uint32_t label_index) | |
539 | { | |
540 | struct route_node *rn; | |
541 | zebra_fec_t *fec; | |
542 | ||
543 | apply_mask(p); | |
544 | ||
545 | /* Lookup (or add) route node.*/ | |
546 | rn = route_node_get(table, p); | |
547 | if (!rn) | |
548 | return NULL; | |
549 | ||
550 | fec = rn->info; | |
551 | ||
552 | if (!fec) { | |
553 | fec = XCALLOC(MTYPE_FEC, sizeof(zebra_fec_t)); | |
554 | ||
555 | rn->info = fec; | |
556 | fec->rn = rn; | |
557 | fec->label = label; | |
558 | fec->client_list = list_new(); | |
559 | } else | |
560 | route_unlock_node(rn); /* for the route_node_get */ | |
561 | ||
562 | fec->label_index = label_index; | |
563 | fec->flags = flags; | |
564 | ||
565 | return fec; | |
566 | } | |
567 | ||
568 | /* | |
569 | * Delete a FEC. This may be upon the last client deregistering for | |
570 | * a FEC and no binding exists or when the binding is deleted and there | |
571 | * are no registered clients. | |
572 | */ | |
573 | static int fec_del(zebra_fec_t *fec) | |
574 | { | |
575 | list_delete(&fec->client_list); | |
576 | fec->rn->info = NULL; | |
577 | route_unlock_node(fec->rn); | |
578 | XFREE(MTYPE_FEC, fec); | |
579 | return 0; | |
580 | } | |
581 | ||
582 | /* | |
583 | * Hash function for label. | |
584 | */ | |
585 | static unsigned int label_hash(void *p) | |
586 | { | |
587 | const zebra_ile_t *ile = p; | |
588 | ||
589 | return (jhash_1word(ile->in_label, 0)); | |
590 | } | |
591 | ||
592 | /* | |
593 | * Compare 2 LSP hash entries based on in-label. | |
594 | */ | |
595 | static bool label_cmp(const void *p1, const void *p2) | |
596 | { | |
597 | const zebra_ile_t *ile1 = p1; | |
598 | const zebra_ile_t *ile2 = p2; | |
599 | ||
600 | return (ile1->in_label == ile2->in_label); | |
601 | } | |
602 | ||
603 | /* | |
604 | * Check if an IPv4 nexthop for a NHLFE is active. Update nexthop based on | |
605 | * the passed flag. | |
606 | * NOTE: Looking only for connected routes right now. | |
607 | */ | |
608 | static int nhlfe_nexthop_active_ipv4(zebra_nhlfe_t *nhlfe, | |
609 | struct nexthop *nexthop) | |
610 | { | |
611 | struct route_table *table; | |
612 | struct prefix_ipv4 p; | |
613 | struct route_node *rn; | |
614 | struct route_entry *match; | |
615 | struct nexthop *match_nh; | |
616 | ||
617 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, nexthop->vrf_id); | |
618 | if (!table) | |
619 | return 0; | |
620 | ||
621 | /* Lookup nexthop in IPv4 routing table. */ | |
622 | memset(&p, 0, sizeof(struct prefix_ipv4)); | |
623 | p.family = AF_INET; | |
624 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
625 | p.prefix = nexthop->gate.ipv4; | |
626 | ||
627 | rn = route_node_match(table, (struct prefix *)&p); | |
628 | if (!rn) | |
629 | return 0; | |
630 | ||
631 | route_unlock_node(rn); | |
632 | ||
633 | /* Locate a valid connected route. */ | |
634 | RNODE_FOREACH_RE (rn, match) { | |
635 | if (CHECK_FLAG(match->status, ROUTE_ENTRY_REMOVED) | |
636 | || !CHECK_FLAG(match->flags, ZEBRA_FLAG_SELECTED)) | |
637 | continue; | |
638 | ||
639 | for (match_nh = match->ng.nexthop; match_nh; | |
640 | match_nh = match_nh->next) { | |
641 | if (match->type == ZEBRA_ROUTE_CONNECT | |
642 | || nexthop->ifindex == match_nh->ifindex) { | |
643 | nexthop->ifindex = match_nh->ifindex; | |
644 | return 1; | |
645 | } | |
646 | } | |
647 | } | |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
652 | ||
653 | /* | |
654 | * Check if an IPv6 nexthop for a NHLFE is active. Update nexthop based on | |
655 | * the passed flag. | |
656 | * NOTE: Looking only for connected routes right now. | |
657 | */ | |
658 | static int nhlfe_nexthop_active_ipv6(zebra_nhlfe_t *nhlfe, | |
659 | struct nexthop *nexthop) | |
660 | { | |
661 | struct route_table *table; | |
662 | struct prefix_ipv6 p; | |
663 | struct route_node *rn; | |
664 | struct route_entry *match; | |
665 | ||
666 | table = zebra_vrf_table(AFI_IP6, SAFI_UNICAST, nexthop->vrf_id); | |
667 | if (!table) | |
668 | return 0; | |
669 | ||
670 | /* Lookup nexthop in IPv6 routing table. */ | |
671 | memset(&p, 0, sizeof(struct prefix_ipv6)); | |
672 | p.family = AF_INET6; | |
673 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
674 | p.prefix = nexthop->gate.ipv6; | |
675 | ||
676 | rn = route_node_match(table, (struct prefix *)&p); | |
677 | if (!rn) | |
678 | return 0; | |
679 | ||
680 | route_unlock_node(rn); | |
681 | ||
682 | /* Locate a valid connected route. */ | |
683 | RNODE_FOREACH_RE (rn, match) { | |
684 | if ((match->type == ZEBRA_ROUTE_CONNECT) | |
685 | && !CHECK_FLAG(match->status, ROUTE_ENTRY_REMOVED) | |
686 | && CHECK_FLAG(match->flags, ZEBRA_FLAG_SELECTED)) | |
687 | break; | |
688 | } | |
689 | ||
690 | if (!match || !match->ng.nexthop) | |
691 | return 0; | |
692 | ||
693 | nexthop->ifindex = match->ng.nexthop->ifindex; | |
694 | return 1; | |
695 | } | |
696 | ||
697 | ||
698 | /* | |
699 | * Check the nexthop reachability for a NHLFE and return if valid (reachable) | |
700 | * or not. | |
701 | * NOTE: Each NHLFE points to only 1 nexthop. | |
702 | */ | |
703 | static int nhlfe_nexthop_active(zebra_nhlfe_t *nhlfe) | |
704 | { | |
705 | struct nexthop *nexthop; | |
706 | struct interface *ifp; | |
707 | struct zebra_ns *zns; | |
708 | ||
709 | nexthop = nhlfe->nexthop; | |
710 | if (!nexthop) // unexpected | |
711 | return 0; | |
712 | ||
713 | /* Check on nexthop based on type. */ | |
714 | switch (nexthop->type) { | |
715 | case NEXTHOP_TYPE_IFINDEX: | |
716 | /* | |
717 | * Lookup if this type is special. The | |
718 | * NEXTHOP_TYPE_IFINDEX is a pop and | |
719 | * forward into a different table for | |
720 | * processing. As such this ifindex | |
721 | * passed to us may be a VRF device | |
722 | * which will not be in the default | |
723 | * VRF. So let's look in all of them | |
724 | */ | |
725 | zns = zebra_ns_lookup(NS_DEFAULT); | |
726 | ifp = if_lookup_by_index_per_ns(zns, nexthop->ifindex); | |
727 | if (ifp && if_is_operative(ifp)) | |
728 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
729 | else | |
730 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
731 | break; | |
732 | case NEXTHOP_TYPE_IPV4: | |
733 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
734 | if (nhlfe_nexthop_active_ipv4(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: | |
741 | if (nhlfe_nexthop_active_ipv6(nhlfe, nexthop)) | |
742 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
743 | else | |
744 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
745 | break; | |
746 | ||
747 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
748 | if (IN6_IS_ADDR_LINKLOCAL(&nexthop->gate.ipv6)) { | |
749 | ifp = if_lookup_by_index(nexthop->ifindex, | |
750 | nexthop->vrf_id); | |
751 | if (ifp && if_is_operative(ifp)) | |
752 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
753 | else | |
754 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
755 | } else { | |
756 | if (nhlfe_nexthop_active_ipv6(nhlfe, nexthop)) | |
757 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
758 | else | |
759 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
760 | } | |
761 | break; | |
762 | ||
763 | default: | |
764 | break; | |
765 | } | |
766 | ||
767 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
768 | } | |
769 | ||
770 | /* | |
771 | * Walk through NHLFEs for a LSP forwarding entry, verify nexthop | |
772 | * reachability and select the best. Multipath entries are also | |
773 | * marked. This is invoked when an LSP scheduled for processing (due | |
774 | * to some change) is examined. | |
775 | */ | |
776 | static void lsp_select_best_nhlfe(zebra_lsp_t *lsp) | |
777 | { | |
778 | zebra_nhlfe_t *nhlfe; | |
779 | zebra_nhlfe_t *best; | |
780 | struct nexthop *nexthop; | |
781 | int changed = 0; | |
782 | ||
783 | if (!lsp) | |
784 | return; | |
785 | ||
786 | best = NULL; | |
787 | lsp->num_ecmp = 0; | |
788 | UNSET_FLAG(lsp->flags, LSP_FLAG_CHANGED); | |
789 | ||
790 | /* | |
791 | * First compute the best path, after checking nexthop status. We are | |
792 | * only | |
793 | * concerned with non-deleted NHLFEs. | |
794 | */ | |
795 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
796 | /* Clear selection flags. */ | |
797 | UNSET_FLAG(nhlfe->flags, | |
798 | (NHLFE_FLAG_SELECTED | NHLFE_FLAG_MULTIPATH)); | |
799 | ||
800 | if (!CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED) | |
801 | && nhlfe_nexthop_active(nhlfe)) { | |
802 | if (!best || (nhlfe->distance < best->distance)) | |
803 | best = nhlfe; | |
804 | } | |
805 | } | |
806 | ||
807 | lsp->best_nhlfe = best; | |
808 | if (!lsp->best_nhlfe) | |
809 | return; | |
810 | ||
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 | */ | |
820 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
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); | |
853 | } | |
854 | ||
855 | /* | |
856 | * Delete LSP forwarding entry from kernel, if installed. Called upon | |
857 | * process exit. | |
858 | */ | |
859 | static void lsp_uninstall_from_kernel(struct hash_backet *backet, void *ctxt) | |
860 | { | |
861 | zebra_lsp_t *lsp; | |
862 | ||
863 | lsp = (zebra_lsp_t *)backet->data; | |
864 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) | |
865 | (void)kernel_del_lsp(lsp); | |
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 | */ | |
872 | static void lsp_schedule(struct hash_backet *backet, void *ctxt) | |
873 | { | |
874 | zebra_lsp_t *lsp; | |
875 | ||
876 | lsp = (zebra_lsp_t *)backet->data; | |
877 | (void)lsp_processq_add(lsp); | |
878 | } | |
879 | ||
880 | /* | |
881 | * Process a LSP entry that is in the queue. Recalculate best NHLFE and | |
882 | * any multipaths and update or delete from the kernel, as needed. | |
883 | */ | |
884 | static wq_item_status lsp_process(struct work_queue *wq, void *data) | |
885 | { | |
886 | zebra_lsp_t *lsp; | |
887 | zebra_nhlfe_t *oldbest, *newbest; | |
888 | char buf[BUFSIZ], buf2[BUFSIZ]; | |
889 | struct zebra_vrf *zvrf = vrf_info_lookup(VRF_DEFAULT); | |
890 | ||
891 | lsp = (zebra_lsp_t *)data; | |
892 | if (!lsp) // unexpected | |
893 | return WQ_SUCCESS; | |
894 | ||
895 | oldbest = lsp->best_nhlfe; | |
896 | ||
897 | /* Select best NHLFE(s) */ | |
898 | lsp_select_best_nhlfe(lsp); | |
899 | ||
900 | newbest = lsp->best_nhlfe; | |
901 | ||
902 | if (IS_ZEBRA_DEBUG_MPLS) { | |
903 | if (oldbest) | |
904 | nhlfe2str(oldbest, buf, BUFSIZ); | |
905 | if (newbest) | |
906 | nhlfe2str(newbest, buf2, BUFSIZ); | |
907 | zlog_debug( | |
908 | "Process LSP in-label %u oldbest %s newbest %s " | |
909 | "flags 0x%x ecmp# %d", | |
910 | lsp->ile.in_label, oldbest ? buf : "NULL", | |
911 | newbest ? buf2 : "NULL", lsp->flags, lsp->num_ecmp); | |
912 | } | |
913 | ||
914 | if (!CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) { | |
915 | /* Not already installed */ | |
916 | if (newbest) { | |
917 | ||
918 | UNSET_FLAG(lsp->flags, LSP_FLAG_CHANGED); | |
919 | switch (kernel_add_lsp(lsp)) { | |
920 | case ZEBRA_DPLANE_REQUEST_QUEUED: | |
921 | flog_err( | |
922 | EC_ZEBRA_DP_INVALID_RC, | |
923 | "No current DataPlane interfaces can return this, please fix"); | |
924 | break; | |
925 | case ZEBRA_DPLANE_REQUEST_FAILURE: | |
926 | break; | |
927 | case ZEBRA_DPLANE_REQUEST_SUCCESS: | |
928 | zvrf->lsp_installs++; | |
929 | break; | |
930 | } | |
931 | } | |
932 | } else { | |
933 | /* Installed, may need an update and/or delete. */ | |
934 | if (!newbest) { | |
935 | ||
936 | switch (kernel_del_lsp(lsp)) { | |
937 | case ZEBRA_DPLANE_REQUEST_QUEUED: | |
938 | flog_err( | |
939 | EC_ZEBRA_DP_INVALID_RC, | |
940 | "No current DataPlane interfaces can return this, please fix"); | |
941 | break; | |
942 | case ZEBRA_DPLANE_REQUEST_FAILURE: | |
943 | break; | |
944 | case ZEBRA_DPLANE_REQUEST_SUCCESS: | |
945 | zvrf->lsp_removals++; | |
946 | break; | |
947 | } | |
948 | } else if (CHECK_FLAG(lsp->flags, LSP_FLAG_CHANGED)) { | |
949 | zebra_nhlfe_t *nhlfe; | |
950 | struct nexthop *nexthop; | |
951 | ||
952 | UNSET_FLAG(lsp->flags, LSP_FLAG_CHANGED); | |
953 | UNSET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); | |
954 | ||
955 | /* | |
956 | * Any NHLFE that was installed but is not | |
957 | * selected now needs to have its flags updated. | |
958 | */ | |
959 | for (nhlfe = lsp->nhlfe_list; nhlfe; | |
960 | nhlfe = nhlfe->next) { | |
961 | nexthop = nhlfe->nexthop; | |
962 | if (!nexthop) | |
963 | continue; | |
964 | ||
965 | if (CHECK_FLAG(nhlfe->flags, | |
966 | NHLFE_FLAG_INSTALLED) | |
967 | && !CHECK_FLAG(nhlfe->flags, | |
968 | NHLFE_FLAG_SELECTED)) { | |
969 | UNSET_FLAG(nhlfe->flags, | |
970 | NHLFE_FLAG_INSTALLED); | |
971 | UNSET_FLAG(nexthop->flags, | |
972 | NEXTHOP_FLAG_FIB); | |
973 | } | |
974 | } | |
975 | ||
976 | switch (kernel_upd_lsp(lsp)) { | |
977 | case ZEBRA_DPLANE_REQUEST_QUEUED: | |
978 | flog_err( | |
979 | EC_ZEBRA_DP_INVALID_RC, | |
980 | "No current DataPlane interfaces can return this, please fix"); | |
981 | break; | |
982 | case ZEBRA_DPLANE_REQUEST_FAILURE: | |
983 | break; | |
984 | case ZEBRA_DPLANE_REQUEST_SUCCESS: | |
985 | zvrf->lsp_installs++; | |
986 | break; | |
987 | } | |
988 | } | |
989 | } | |
990 | ||
991 | return WQ_SUCCESS; | |
992 | } | |
993 | ||
994 | ||
995 | /* | |
996 | * Callback upon processing completion of a LSP forwarding entry. | |
997 | */ | |
998 | static void lsp_processq_del(struct work_queue *wq, void *data) | |
999 | { | |
1000 | struct zebra_vrf *zvrf; | |
1001 | zebra_lsp_t *lsp; | |
1002 | struct hash *lsp_table; | |
1003 | zebra_nhlfe_t *nhlfe, *nhlfe_next; | |
1004 | ||
1005 | zvrf = vrf_info_lookup(VRF_DEFAULT); | |
1006 | assert(zvrf); | |
1007 | ||
1008 | lsp_table = zvrf->lsp_table; | |
1009 | if (!lsp_table) // unexpected | |
1010 | return; | |
1011 | ||
1012 | lsp = (zebra_lsp_t *)data; | |
1013 | if (!lsp) // unexpected | |
1014 | return; | |
1015 | ||
1016 | /* Clear flag, remove any NHLFEs marked for deletion. If no NHLFEs | |
1017 | * exist, | |
1018 | * delete LSP entry also. | |
1019 | */ | |
1020 | UNSET_FLAG(lsp->flags, LSP_FLAG_SCHEDULED); | |
1021 | ||
1022 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe_next) { | |
1023 | nhlfe_next = nhlfe->next; | |
1024 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED)) | |
1025 | nhlfe_del(nhlfe); | |
1026 | } | |
1027 | ||
1028 | if (!lsp->nhlfe_list) { | |
1029 | if (IS_ZEBRA_DEBUG_MPLS) | |
1030 | zlog_debug("Free LSP in-label %u flags 0x%x", | |
1031 | lsp->ile.in_label, lsp->flags); | |
1032 | ||
1033 | lsp = hash_release(lsp_table, &lsp->ile); | |
1034 | if (lsp) | |
1035 | XFREE(MTYPE_LSP, lsp); | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Callback upon finishing the processing of all scheduled | |
1041 | * LSP forwarding entries. | |
1042 | */ | |
1043 | static void lsp_processq_complete(struct work_queue *wq) | |
1044 | { | |
1045 | /* Nothing to do for now. */ | |
1046 | } | |
1047 | ||
1048 | /* | |
1049 | * Add LSP forwarding entry to queue for subsequent processing. | |
1050 | */ | |
1051 | static int lsp_processq_add(zebra_lsp_t *lsp) | |
1052 | { | |
1053 | /* If already scheduled, exit. */ | |
1054 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_SCHEDULED)) | |
1055 | return 0; | |
1056 | ||
1057 | if (zebrad.lsp_process_q == NULL) { | |
1058 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, | |
1059 | "%s: work_queue does not exist!", __func__); | |
1060 | return -1; | |
1061 | } | |
1062 | ||
1063 | work_queue_add(zebrad.lsp_process_q, lsp); | |
1064 | SET_FLAG(lsp->flags, LSP_FLAG_SCHEDULED); | |
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | /* | |
1069 | * Callback to allocate LSP forwarding table entry. | |
1070 | */ | |
1071 | static void *lsp_alloc(void *p) | |
1072 | { | |
1073 | const zebra_ile_t *ile = p; | |
1074 | zebra_lsp_t *lsp; | |
1075 | ||
1076 | lsp = XCALLOC(MTYPE_LSP, sizeof(zebra_lsp_t)); | |
1077 | lsp->ile = *ile; | |
1078 | ||
1079 | if (IS_ZEBRA_DEBUG_MPLS) | |
1080 | zlog_debug("Alloc LSP in-label %u", lsp->ile.in_label); | |
1081 | ||
1082 | return ((void *)lsp); | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * Create printable string for NHLFE entry. | |
1087 | */ | |
1088 | static char *nhlfe2str(zebra_nhlfe_t *nhlfe, char *buf, int size) | |
1089 | { | |
1090 | struct nexthop *nexthop; | |
1091 | ||
1092 | buf[0] = '\0'; | |
1093 | nexthop = nhlfe->nexthop; | |
1094 | switch (nexthop->type) { | |
1095 | case NEXTHOP_TYPE_IPV4: | |
1096 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1097 | inet_ntop(AF_INET, &nexthop->gate.ipv4, buf, size); | |
1098 | break; | |
1099 | case NEXTHOP_TYPE_IPV6: | |
1100 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, buf, size); | |
1101 | break; | |
1102 | case NEXTHOP_TYPE_IFINDEX: | |
1103 | snprintf(buf, size, "Ifindex: %u", nexthop->ifindex); | |
1104 | default: | |
1105 | break; | |
1106 | } | |
1107 | ||
1108 | return buf; | |
1109 | } | |
1110 | ||
1111 | /* | |
1112 | * Check if NHLFE matches with search info passed. | |
1113 | */ | |
1114 | static int nhlfe_nhop_match(zebra_nhlfe_t *nhlfe, enum nexthop_types_t gtype, | |
1115 | union g_addr *gate, ifindex_t ifindex) | |
1116 | { | |
1117 | struct nexthop *nhop; | |
1118 | int cmp = 1; | |
1119 | ||
1120 | nhop = nhlfe->nexthop; | |
1121 | if (!nhop) | |
1122 | return 1; | |
1123 | ||
1124 | if (nhop->type != gtype) | |
1125 | return 1; | |
1126 | ||
1127 | switch (nhop->type) { | |
1128 | case NEXTHOP_TYPE_IPV4: | |
1129 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1130 | cmp = memcmp(&(nhop->gate.ipv4), &(gate->ipv4), | |
1131 | sizeof(struct in_addr)); | |
1132 | if (!cmp && nhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
1133 | cmp = !(nhop->ifindex == ifindex); | |
1134 | break; | |
1135 | case NEXTHOP_TYPE_IPV6: | |
1136 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1137 | cmp = memcmp(&(nhop->gate.ipv6), &(gate->ipv6), | |
1138 | sizeof(struct in6_addr)); | |
1139 | if (!cmp && nhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) | |
1140 | cmp = !(nhop->ifindex == ifindex); | |
1141 | break; | |
1142 | case NEXTHOP_TYPE_IFINDEX: | |
1143 | cmp = !(nhop->ifindex == ifindex); | |
1144 | break; | |
1145 | default: | |
1146 | break; | |
1147 | } | |
1148 | ||
1149 | return cmp; | |
1150 | } | |
1151 | ||
1152 | ||
1153 | /* | |
1154 | * Locate NHLFE that matches with passed info. | |
1155 | */ | |
1156 | static zebra_nhlfe_t *nhlfe_find(zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
1157 | enum nexthop_types_t gtype, union g_addr *gate, | |
1158 | ifindex_t ifindex) | |
1159 | { | |
1160 | zebra_nhlfe_t *nhlfe; | |
1161 | ||
1162 | if (!lsp) | |
1163 | return NULL; | |
1164 | ||
1165 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
1166 | if (nhlfe->type != lsp_type) | |
1167 | continue; | |
1168 | if (!nhlfe_nhop_match(nhlfe, gtype, gate, ifindex)) | |
1169 | break; | |
1170 | } | |
1171 | ||
1172 | return nhlfe; | |
1173 | } | |
1174 | ||
1175 | /* | |
1176 | * Add NHLFE. Base entry must have been created and duplicate | |
1177 | * check done. | |
1178 | */ | |
1179 | static zebra_nhlfe_t *nhlfe_add(zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
1180 | enum nexthop_types_t gtype, union g_addr *gate, | |
1181 | ifindex_t ifindex, mpls_label_t out_label) | |
1182 | { | |
1183 | zebra_nhlfe_t *nhlfe; | |
1184 | struct nexthop *nexthop; | |
1185 | ||
1186 | if (!lsp) | |
1187 | return NULL; | |
1188 | ||
1189 | nhlfe = XCALLOC(MTYPE_NHLFE, sizeof(zebra_nhlfe_t)); | |
1190 | ||
1191 | nhlfe->lsp = lsp; | |
1192 | nhlfe->type = lsp_type; | |
1193 | nhlfe->distance = lsp_distance(lsp_type); | |
1194 | ||
1195 | nexthop = nexthop_new(); | |
1196 | if (!nexthop) { | |
1197 | XFREE(MTYPE_NHLFE, nhlfe); | |
1198 | return NULL; | |
1199 | } | |
1200 | nexthop_add_labels(nexthop, lsp_type, 1, &out_label); | |
1201 | ||
1202 | nexthop->vrf_id = VRF_DEFAULT; | |
1203 | nexthop->type = gtype; | |
1204 | switch (nexthop->type) { | |
1205 | case NEXTHOP_TYPE_IPV4: | |
1206 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1207 | nexthop->gate.ipv4 = gate->ipv4; | |
1208 | if (ifindex) | |
1209 | nexthop->ifindex = ifindex; | |
1210 | break; | |
1211 | case NEXTHOP_TYPE_IPV6: | |
1212 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1213 | nexthop->gate.ipv6 = gate->ipv6; | |
1214 | if (ifindex) | |
1215 | nexthop->ifindex = ifindex; | |
1216 | break; | |
1217 | case NEXTHOP_TYPE_IFINDEX: | |
1218 | nexthop->ifindex = ifindex; | |
1219 | break; | |
1220 | default: | |
1221 | nexthop_free(nexthop); | |
1222 | XFREE(MTYPE_NHLFE, nhlfe); | |
1223 | return NULL; | |
1224 | break; | |
1225 | } | |
1226 | ||
1227 | nhlfe->nexthop = nexthop; | |
1228 | if (lsp->nhlfe_list) | |
1229 | lsp->nhlfe_list->prev = nhlfe; | |
1230 | nhlfe->next = lsp->nhlfe_list; | |
1231 | lsp->nhlfe_list = nhlfe; | |
1232 | ||
1233 | return nhlfe; | |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | * Delete NHLFE. Entry must be present on list. | |
1238 | */ | |
1239 | static int nhlfe_del(zebra_nhlfe_t *nhlfe) | |
1240 | { | |
1241 | zebra_lsp_t *lsp; | |
1242 | ||
1243 | if (!nhlfe) | |
1244 | return -1; | |
1245 | ||
1246 | lsp = nhlfe->lsp; | |
1247 | if (!lsp) | |
1248 | return -1; | |
1249 | ||
1250 | /* Free nexthop. */ | |
1251 | if (nhlfe->nexthop) | |
1252 | nexthop_free(nhlfe->nexthop); | |
1253 | ||
1254 | /* Unlink from LSP */ | |
1255 | if (nhlfe->next) | |
1256 | nhlfe->next->prev = nhlfe->prev; | |
1257 | if (nhlfe->prev) | |
1258 | nhlfe->prev->next = nhlfe->next; | |
1259 | else | |
1260 | lsp->nhlfe_list = nhlfe->next; | |
1261 | ||
1262 | if (nhlfe == lsp->best_nhlfe) | |
1263 | lsp->best_nhlfe = NULL; | |
1264 | ||
1265 | XFREE(MTYPE_NHLFE, nhlfe); | |
1266 | ||
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | /* | |
1271 | * Update label for NHLFE entry. | |
1272 | */ | |
1273 | static void nhlfe_out_label_update(zebra_nhlfe_t *nhlfe, | |
1274 | struct mpls_label_stack *nh_label) | |
1275 | { | |
1276 | nhlfe->nexthop->nh_label->label[0] = nh_label->label[0]; | |
1277 | } | |
1278 | ||
1279 | static int mpls_lsp_uninstall_all(struct hash *lsp_table, zebra_lsp_t *lsp, | |
1280 | enum lsp_types_t type) | |
1281 | { | |
1282 | zebra_nhlfe_t *nhlfe, *nhlfe_next; | |
1283 | int schedule_lsp = 0; | |
1284 | char buf[BUFSIZ]; | |
1285 | ||
1286 | /* Mark NHLFEs for delete or directly delete, as appropriate. */ | |
1287 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe_next) { | |
1288 | nhlfe_next = nhlfe->next; | |
1289 | ||
1290 | /* Skip non-static NHLFEs */ | |
1291 | if (nhlfe->type != type) | |
1292 | continue; | |
1293 | ||
1294 | if (IS_ZEBRA_DEBUG_MPLS) { | |
1295 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
1296 | zlog_debug( | |
1297 | "Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
1298 | lsp->ile.in_label, type, buf, nhlfe->flags); | |
1299 | } | |
1300 | ||
1301 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) { | |
1302 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
1303 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
1304 | schedule_lsp = 1; | |
1305 | } else { | |
1306 | nhlfe_del(nhlfe); | |
1307 | } | |
1308 | } | |
1309 | ||
1310 | /* Queue LSP for processing, if needed, else delete. */ | |
1311 | if (schedule_lsp) { | |
1312 | if (lsp_processq_add(lsp)) | |
1313 | return -1; | |
1314 | } else if (!lsp->nhlfe_list | |
1315 | && !CHECK_FLAG(lsp->flags, LSP_FLAG_SCHEDULED)) { | |
1316 | if (IS_ZEBRA_DEBUG_MPLS) | |
1317 | zlog_debug("Free LSP in-label %u flags 0x%x", | |
1318 | lsp->ile.in_label, lsp->flags); | |
1319 | ||
1320 | lsp = hash_release(lsp_table, &lsp->ile); | |
1321 | if (lsp) | |
1322 | XFREE(MTYPE_LSP, lsp); | |
1323 | } | |
1324 | ||
1325 | return 0; | |
1326 | } | |
1327 | ||
1328 | /* | |
1329 | * Uninstall all static NHLFEs for a particular LSP forwarding entry. | |
1330 | * If no other NHLFEs exist, the entry would be deleted. | |
1331 | */ | |
1332 | static int mpls_static_lsp_uninstall_all(struct zebra_vrf *zvrf, | |
1333 | mpls_label_t in_label) | |
1334 | { | |
1335 | struct hash *lsp_table; | |
1336 | zebra_ile_t tmp_ile; | |
1337 | zebra_lsp_t *lsp; | |
1338 | ||
1339 | /* Lookup table. */ | |
1340 | lsp_table = zvrf->lsp_table; | |
1341 | if (!lsp_table) | |
1342 | return -1; | |
1343 | ||
1344 | /* If entry is not present, exit. */ | |
1345 | tmp_ile.in_label = in_label; | |
1346 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
1347 | if (!lsp || !lsp->nhlfe_list) | |
1348 | return 0; | |
1349 | ||
1350 | return mpls_lsp_uninstall_all(lsp_table, lsp, ZEBRA_LSP_STATIC); | |
1351 | } | |
1352 | ||
1353 | static json_object *nhlfe_json(zebra_nhlfe_t *nhlfe) | |
1354 | { | |
1355 | char buf[BUFSIZ]; | |
1356 | json_object *json_nhlfe = NULL; | |
1357 | struct nexthop *nexthop = nhlfe->nexthop; | |
1358 | ||
1359 | json_nhlfe = json_object_new_object(); | |
1360 | json_object_string_add(json_nhlfe, "type", nhlfe_type2str(nhlfe->type)); | |
1361 | json_object_int_add(json_nhlfe, "outLabel", | |
1362 | nexthop->nh_label->label[0]); | |
1363 | json_object_int_add(json_nhlfe, "distance", nhlfe->distance); | |
1364 | ||
1365 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) | |
1366 | json_object_boolean_true_add(json_nhlfe, "installed"); | |
1367 | ||
1368 | switch (nexthop->type) { | |
1369 | case NEXTHOP_TYPE_IPV4: | |
1370 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1371 | json_object_string_add(json_nhlfe, "nexthop", | |
1372 | inet_ntoa(nexthop->gate.ipv4)); | |
1373 | break; | |
1374 | case NEXTHOP_TYPE_IPV6: | |
1375 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1376 | json_object_string_add( | |
1377 | json_nhlfe, "nexthop", | |
1378 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); | |
1379 | ||
1380 | if (nexthop->ifindex) | |
1381 | json_object_string_add(json_nhlfe, "interface", | |
1382 | ifindex2ifname(nexthop->ifindex, | |
1383 | nexthop->vrf_id)); | |
1384 | break; | |
1385 | default: | |
1386 | break; | |
1387 | } | |
1388 | return json_nhlfe; | |
1389 | } | |
1390 | ||
1391 | /* | |
1392 | * Print the NHLFE for a LSP forwarding entry. | |
1393 | */ | |
1394 | static void nhlfe_print(zebra_nhlfe_t *nhlfe, struct vty *vty) | |
1395 | { | |
1396 | struct nexthop *nexthop; | |
1397 | char buf[BUFSIZ]; | |
1398 | ||
1399 | nexthop = nhlfe->nexthop; | |
1400 | if (!nexthop || !nexthop->nh_label) // unexpected | |
1401 | return; | |
1402 | ||
1403 | vty_out(vty, " type: %s remote label: %s distance: %d\n", | |
1404 | nhlfe_type2str(nhlfe->type), | |
1405 | label2str(nexthop->nh_label->label[0], buf, BUFSIZ), | |
1406 | nhlfe->distance); | |
1407 | switch (nexthop->type) { | |
1408 | case NEXTHOP_TYPE_IPV4: | |
1409 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1410 | vty_out(vty, " via %s", inet_ntoa(nexthop->gate.ipv4)); | |
1411 | if (nexthop->ifindex) | |
1412 | vty_out(vty, " dev %s", | |
1413 | ifindex2ifname(nexthop->ifindex, | |
1414 | nexthop->vrf_id)); | |
1415 | break; | |
1416 | case NEXTHOP_TYPE_IPV6: | |
1417 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1418 | vty_out(vty, " via %s", | |
1419 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); | |
1420 | if (nexthop->ifindex) | |
1421 | vty_out(vty, " dev %s", | |
1422 | ifindex2ifname(nexthop->ifindex, | |
1423 | nexthop->vrf_id)); | |
1424 | break; | |
1425 | default: | |
1426 | break; | |
1427 | } | |
1428 | vty_out(vty, "%s", | |
1429 | CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) ? " (installed)" | |
1430 | : ""); | |
1431 | vty_out(vty, "\n"); | |
1432 | } | |
1433 | ||
1434 | /* | |
1435 | * Print an LSP forwarding entry. | |
1436 | */ | |
1437 | static void lsp_print(zebra_lsp_t *lsp, void *ctxt) | |
1438 | { | |
1439 | zebra_nhlfe_t *nhlfe; | |
1440 | struct vty *vty; | |
1441 | ||
1442 | vty = (struct vty *)ctxt; | |
1443 | ||
1444 | vty_out(vty, "Local label: %u%s\n", lsp->ile.in_label, | |
1445 | CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED) ? " (installed)" | |
1446 | : ""); | |
1447 | ||
1448 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1449 | nhlfe_print(nhlfe, vty); | |
1450 | } | |
1451 | ||
1452 | /* | |
1453 | * JSON objects for an LSP forwarding entry. | |
1454 | */ | |
1455 | static json_object *lsp_json(zebra_lsp_t *lsp) | |
1456 | { | |
1457 | zebra_nhlfe_t *nhlfe = NULL; | |
1458 | json_object *json = json_object_new_object(); | |
1459 | json_object *json_nhlfe_list = json_object_new_array(); | |
1460 | ||
1461 | json_object_int_add(json, "inLabel", lsp->ile.in_label); | |
1462 | ||
1463 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) | |
1464 | json_object_boolean_true_add(json, "installed"); | |
1465 | ||
1466 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) | |
1467 | json_object_array_add(json_nhlfe_list, nhlfe_json(nhlfe)); | |
1468 | ||
1469 | json_object_object_add(json, "nexthops", json_nhlfe_list); | |
1470 | return json; | |
1471 | } | |
1472 | ||
1473 | ||
1474 | /* Return a sorted linked list of the hash contents */ | |
1475 | static struct list *hash_get_sorted_list(struct hash *hash, void *cmp) | |
1476 | { | |
1477 | unsigned int i; | |
1478 | struct hash_backet *hb; | |
1479 | struct list *sorted_list = list_new(); | |
1480 | ||
1481 | sorted_list->cmp = (int (*)(void *, void *))cmp; | |
1482 | ||
1483 | for (i = 0; i < hash->size; i++) | |
1484 | for (hb = hash->index[i]; hb; hb = hb->next) | |
1485 | listnode_add_sort(sorted_list, hb->data); | |
1486 | ||
1487 | return sorted_list; | |
1488 | } | |
1489 | ||
1490 | /* | |
1491 | * Compare two LSPs based on their label values. | |
1492 | */ | |
1493 | static int lsp_cmp(zebra_lsp_t *lsp1, zebra_lsp_t *lsp2) | |
1494 | { | |
1495 | if (lsp1->ile.in_label < lsp2->ile.in_label) | |
1496 | return -1; | |
1497 | ||
1498 | if (lsp1->ile.in_label > lsp2->ile.in_label) | |
1499 | return 1; | |
1500 | ||
1501 | return 0; | |
1502 | } | |
1503 | ||
1504 | /* | |
1505 | * Callback to allocate static LSP. | |
1506 | */ | |
1507 | static void *slsp_alloc(void *p) | |
1508 | { | |
1509 | const zebra_ile_t *ile = p; | |
1510 | zebra_slsp_t *slsp; | |
1511 | ||
1512 | slsp = XCALLOC(MTYPE_SLSP, sizeof(zebra_slsp_t)); | |
1513 | slsp->ile = *ile; | |
1514 | return ((void *)slsp); | |
1515 | } | |
1516 | ||
1517 | /* | |
1518 | * Compare two static LSPs based on their label values. | |
1519 | */ | |
1520 | static int slsp_cmp(zebra_slsp_t *slsp1, zebra_slsp_t *slsp2) | |
1521 | { | |
1522 | if (slsp1->ile.in_label < slsp2->ile.in_label) | |
1523 | return -1; | |
1524 | ||
1525 | if (slsp1->ile.in_label > slsp2->ile.in_label) | |
1526 | return 1; | |
1527 | ||
1528 | return 0; | |
1529 | } | |
1530 | ||
1531 | /* | |
1532 | * Check if static NHLFE matches with search info passed. | |
1533 | */ | |
1534 | static int snhlfe_match(zebra_snhlfe_t *snhlfe, enum nexthop_types_t gtype, | |
1535 | union g_addr *gate, ifindex_t ifindex) | |
1536 | { | |
1537 | int cmp = 1; | |
1538 | ||
1539 | if (snhlfe->gtype != gtype) | |
1540 | return 1; | |
1541 | ||
1542 | switch (snhlfe->gtype) { | |
1543 | case NEXTHOP_TYPE_IPV4: | |
1544 | cmp = memcmp(&(snhlfe->gate.ipv4), &(gate->ipv4), | |
1545 | sizeof(struct in_addr)); | |
1546 | break; | |
1547 | case NEXTHOP_TYPE_IPV6: | |
1548 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1549 | cmp = memcmp(&(snhlfe->gate.ipv6), &(gate->ipv6), | |
1550 | sizeof(struct in6_addr)); | |
1551 | if (!cmp && snhlfe->gtype == NEXTHOP_TYPE_IPV6_IFINDEX) | |
1552 | cmp = !(snhlfe->ifindex == ifindex); | |
1553 | break; | |
1554 | default: | |
1555 | break; | |
1556 | } | |
1557 | ||
1558 | return cmp; | |
1559 | } | |
1560 | ||
1561 | /* | |
1562 | * Locate static NHLFE that matches with passed info. | |
1563 | */ | |
1564 | static zebra_snhlfe_t *snhlfe_find(zebra_slsp_t *slsp, | |
1565 | enum nexthop_types_t gtype, | |
1566 | union g_addr *gate, ifindex_t ifindex) | |
1567 | { | |
1568 | zebra_snhlfe_t *snhlfe; | |
1569 | ||
1570 | if (!slsp) | |
1571 | return NULL; | |
1572 | ||
1573 | for (snhlfe = slsp->snhlfe_list; snhlfe; snhlfe = snhlfe->next) { | |
1574 | if (!snhlfe_match(snhlfe, gtype, gate, ifindex)) | |
1575 | break; | |
1576 | } | |
1577 | ||
1578 | return snhlfe; | |
1579 | } | |
1580 | ||
1581 | ||
1582 | /* | |
1583 | * Add static NHLFE. Base LSP config entry must have been created | |
1584 | * and duplicate check done. | |
1585 | */ | |
1586 | static zebra_snhlfe_t *snhlfe_add(zebra_slsp_t *slsp, | |
1587 | enum nexthop_types_t gtype, | |
1588 | union g_addr *gate, ifindex_t ifindex, | |
1589 | mpls_label_t out_label) | |
1590 | { | |
1591 | zebra_snhlfe_t *snhlfe; | |
1592 | ||
1593 | if (!slsp) | |
1594 | return NULL; | |
1595 | ||
1596 | snhlfe = XCALLOC(MTYPE_SNHLFE, sizeof(zebra_snhlfe_t)); | |
1597 | snhlfe->slsp = slsp; | |
1598 | snhlfe->out_label = out_label; | |
1599 | snhlfe->gtype = gtype; | |
1600 | switch (gtype) { | |
1601 | case NEXTHOP_TYPE_IPV4: | |
1602 | snhlfe->gate.ipv4 = gate->ipv4; | |
1603 | break; | |
1604 | case NEXTHOP_TYPE_IPV6: | |
1605 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1606 | snhlfe->gate.ipv6 = gate->ipv6; | |
1607 | if (ifindex) | |
1608 | snhlfe->ifindex = ifindex; | |
1609 | break; | |
1610 | default: | |
1611 | XFREE(MTYPE_SNHLFE, snhlfe); | |
1612 | return NULL; | |
1613 | } | |
1614 | ||
1615 | if (slsp->snhlfe_list) | |
1616 | slsp->snhlfe_list->prev = snhlfe; | |
1617 | snhlfe->next = slsp->snhlfe_list; | |
1618 | slsp->snhlfe_list = snhlfe; | |
1619 | ||
1620 | return snhlfe; | |
1621 | } | |
1622 | ||
1623 | /* | |
1624 | * Delete static NHLFE. Entry must be present on list. | |
1625 | */ | |
1626 | static int snhlfe_del(zebra_snhlfe_t *snhlfe) | |
1627 | { | |
1628 | zebra_slsp_t *slsp; | |
1629 | ||
1630 | if (!snhlfe) | |
1631 | return -1; | |
1632 | ||
1633 | slsp = snhlfe->slsp; | |
1634 | if (!slsp) | |
1635 | return -1; | |
1636 | ||
1637 | if (snhlfe->next) | |
1638 | snhlfe->next->prev = snhlfe->prev; | |
1639 | if (snhlfe->prev) | |
1640 | snhlfe->prev->next = snhlfe->next; | |
1641 | else | |
1642 | slsp->snhlfe_list = snhlfe->next; | |
1643 | ||
1644 | snhlfe->prev = snhlfe->next = NULL; | |
1645 | if (snhlfe->ifname) | |
1646 | XFREE(MTYPE_SNHLFE_IFNAME, snhlfe->ifname); | |
1647 | XFREE(MTYPE_SNHLFE, snhlfe); | |
1648 | ||
1649 | return 0; | |
1650 | } | |
1651 | ||
1652 | /* | |
1653 | * Delete all static NHLFE entries for this LSP (in label). | |
1654 | */ | |
1655 | static int snhlfe_del_all(zebra_slsp_t *slsp) | |
1656 | { | |
1657 | zebra_snhlfe_t *snhlfe, *snhlfe_next; | |
1658 | ||
1659 | if (!slsp) | |
1660 | return -1; | |
1661 | ||
1662 | for (snhlfe = slsp->snhlfe_list; snhlfe; snhlfe = snhlfe_next) { | |
1663 | snhlfe_next = snhlfe->next; | |
1664 | snhlfe_del(snhlfe); | |
1665 | } | |
1666 | ||
1667 | return 0; | |
1668 | } | |
1669 | ||
1670 | /* | |
1671 | * Create printable string for NHLFE configuration. | |
1672 | */ | |
1673 | static char *snhlfe2str(zebra_snhlfe_t *snhlfe, char *buf, int size) | |
1674 | { | |
1675 | buf[0] = '\0'; | |
1676 | switch (snhlfe->gtype) { | |
1677 | case NEXTHOP_TYPE_IPV4: | |
1678 | inet_ntop(AF_INET, &snhlfe->gate.ipv4, buf, size); | |
1679 | break; | |
1680 | case NEXTHOP_TYPE_IPV6: | |
1681 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1682 | inet_ntop(AF_INET6, &snhlfe->gate.ipv6, buf, size); | |
1683 | if (snhlfe->ifindex) | |
1684 | strcat(buf, | |
1685 | ifindex2ifname(snhlfe->ifindex, VRF_DEFAULT)); | |
1686 | break; | |
1687 | default: | |
1688 | break; | |
1689 | } | |
1690 | ||
1691 | return buf; | |
1692 | } | |
1693 | ||
1694 | /* | |
1695 | * Initialize work queue for processing changed LSPs. | |
1696 | */ | |
1697 | static int mpls_processq_init(struct zebra_t *zebra) | |
1698 | { | |
1699 | zebra->lsp_process_q = work_queue_new(zebra->master, "LSP processing"); | |
1700 | if (!zebra->lsp_process_q) { | |
1701 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, | |
1702 | "%s: could not initialise work queue!", __func__); | |
1703 | return -1; | |
1704 | } | |
1705 | ||
1706 | zebra->lsp_process_q->spec.workfunc = &lsp_process; | |
1707 | zebra->lsp_process_q->spec.del_item_data = &lsp_processq_del; | |
1708 | zebra->lsp_process_q->spec.errorfunc = NULL; | |
1709 | zebra->lsp_process_q->spec.completion_func = &lsp_processq_complete; | |
1710 | zebra->lsp_process_q->spec.max_retries = 0; | |
1711 | zebra->lsp_process_q->spec.hold = 10; | |
1712 | ||
1713 | return 0; | |
1714 | } | |
1715 | ||
1716 | ||
1717 | /* Public functions */ | |
1718 | ||
1719 | void kernel_lsp_pass_fail(zebra_lsp_t *lsp, enum zebra_dplane_status res) | |
1720 | { | |
1721 | struct nexthop *nexthop; | |
1722 | zebra_nhlfe_t *nhlfe; | |
1723 | ||
1724 | if (!lsp) | |
1725 | return; | |
1726 | ||
1727 | switch (res) { | |
1728 | case ZEBRA_DPLANE_INSTALL_FAILURE: | |
1729 | UNSET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); | |
1730 | clear_nhlfe_installed(lsp); | |
1731 | flog_warn(EC_ZEBRA_LSP_INSTALL_FAILURE, | |
1732 | "LSP Install Failure: %u", lsp->ile.in_label); | |
1733 | break; | |
1734 | case ZEBRA_DPLANE_INSTALL_SUCCESS: | |
1735 | SET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); | |
1736 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
1737 | nexthop = nhlfe->nexthop; | |
1738 | if (!nexthop) | |
1739 | continue; | |
1740 | ||
1741 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1742 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1743 | } | |
1744 | break; | |
1745 | case ZEBRA_DPLANE_DELETE_SUCCESS: | |
1746 | UNSET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); | |
1747 | clear_nhlfe_installed(lsp); | |
1748 | break; | |
1749 | case ZEBRA_DPLANE_DELETE_FAILURE: | |
1750 | flog_warn(EC_ZEBRA_LSP_DELETE_FAILURE, | |
1751 | "LSP Deletion Failure: %u", lsp->ile.in_label); | |
1752 | break; | |
1753 | case ZEBRA_DPLANE_STATUS_NONE: | |
1754 | break; | |
1755 | } | |
1756 | } | |
1757 | ||
1758 | /* | |
1759 | * Install dynamic LSP entry. | |
1760 | */ | |
1761 | int zebra_mpls_lsp_install(struct zebra_vrf *zvrf, struct route_node *rn, | |
1762 | struct route_entry *re) | |
1763 | { | |
1764 | struct route_table *table; | |
1765 | zebra_fec_t *fec; | |
1766 | ||
1767 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(&rn->p))]; | |
1768 | if (!table) | |
1769 | return -1; | |
1770 | ||
1771 | /* See if there is a configured label binding for this FEC. */ | |
1772 | fec = fec_find(table, &rn->p); | |
1773 | if (!fec || fec->label == MPLS_INVALID_LABEL) | |
1774 | return 0; | |
1775 | ||
1776 | /* We cannot install a label forwarding entry if local label is the | |
1777 | * implicit-null label. | |
1778 | */ | |
1779 | if (fec->label == MPLS_LABEL_IMPLICIT_NULL) | |
1780 | return 0; | |
1781 | ||
1782 | if (lsp_install(zvrf, fec->label, rn, re)) | |
1783 | return -1; | |
1784 | ||
1785 | return 0; | |
1786 | } | |
1787 | ||
1788 | /* | |
1789 | * Uninstall dynamic LSP entry, if any. | |
1790 | */ | |
1791 | int zebra_mpls_lsp_uninstall(struct zebra_vrf *zvrf, struct route_node *rn, | |
1792 | struct route_entry *re) | |
1793 | { | |
1794 | struct route_table *table; | |
1795 | zebra_fec_t *fec; | |
1796 | ||
1797 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(&rn->p))]; | |
1798 | if (!table) | |
1799 | return -1; | |
1800 | ||
1801 | /* See if there is a configured label binding for this FEC. */ | |
1802 | fec = fec_find(table, &rn->p); | |
1803 | if (!fec || fec->label == MPLS_INVALID_LABEL) | |
1804 | return 0; | |
1805 | ||
1806 | /* Uninstall always removes all dynamic NHLFEs. */ | |
1807 | return lsp_uninstall(zvrf, fec->label); | |
1808 | } | |
1809 | ||
1810 | /* | |
1811 | * Registration from a client for the label binding for a FEC. If a binding | |
1812 | * already exists, it is informed to the client. | |
1813 | * NOTE: If there is a manually configured label binding, that is used. | |
1814 | * Otherwise, if a label index is specified, it means we have to allocate the | |
1815 | * label from a locally configured label block (SRGB), if one exists and index | |
1816 | * is acceptable. | |
1817 | */ | |
1818 | int zebra_mpls_fec_register(struct zebra_vrf *zvrf, struct prefix *p, | |
1819 | uint32_t label_index, struct zserv *client) | |
1820 | { | |
1821 | struct route_table *table; | |
1822 | zebra_fec_t *fec; | |
1823 | char buf[BUFSIZ]; | |
1824 | int new_client; | |
1825 | int label_change = 0; | |
1826 | uint32_t old_label; | |
1827 | ||
1828 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
1829 | if (!table) | |
1830 | return -1; | |
1831 | ||
1832 | if (IS_ZEBRA_DEBUG_MPLS) | |
1833 | prefix2str(p, buf, BUFSIZ); | |
1834 | ||
1835 | /* Locate FEC */ | |
1836 | fec = fec_find(table, p); | |
1837 | if (!fec) { | |
1838 | fec = fec_add(table, p, MPLS_INVALID_LABEL, 0, label_index); | |
1839 | if (!fec) { | |
1840 | prefix2str(p, buf, BUFSIZ); | |
1841 | flog_err( | |
1842 | EC_ZEBRA_FEC_ADD_FAILED, | |
1843 | "Failed to add FEC %s upon register, client %s", | |
1844 | buf, zebra_route_string(client->proto)); | |
1845 | return -1; | |
1846 | } | |
1847 | ||
1848 | old_label = MPLS_INVALID_LABEL; | |
1849 | new_client = 1; | |
1850 | } else { | |
1851 | /* Client may register same FEC with different label index. */ | |
1852 | new_client = | |
1853 | (listnode_lookup(fec->client_list, client) == NULL); | |
1854 | if (!new_client && fec->label_index == label_index) | |
1855 | /* Duplicate register */ | |
1856 | return 0; | |
1857 | ||
1858 | /* Save current label, update label index */ | |
1859 | old_label = fec->label; | |
1860 | fec->label_index = label_index; | |
1861 | } | |
1862 | ||
1863 | if (new_client) | |
1864 | listnode_add(fec->client_list, client); | |
1865 | ||
1866 | if (IS_ZEBRA_DEBUG_MPLS) | |
1867 | zlog_debug("FEC %s Label Index %u %s by client %s", buf, | |
1868 | label_index, new_client ? "registered" : "updated", | |
1869 | zebra_route_string(client->proto)); | |
1870 | ||
1871 | /* If not a configured FEC, derive the local label (from label index) | |
1872 | * or reset it. | |
1873 | */ | |
1874 | if (!(fec->flags & FEC_FLAG_CONFIGURED)) { | |
1875 | fec_derive_label_from_index(zvrf, fec); | |
1876 | ||
1877 | /* If no label change, exit. */ | |
1878 | if (fec->label == old_label) | |
1879 | return 0; | |
1880 | ||
1881 | label_change = 1; | |
1882 | } | |
1883 | ||
1884 | /* If new client or label change, update client and install or uninstall | |
1885 | * label forwarding entry as needed. | |
1886 | */ | |
1887 | /* Inform client of label, if needed. */ | |
1888 | if ((new_client && fec->label != MPLS_INVALID_LABEL) || label_change) { | |
1889 | if (IS_ZEBRA_DEBUG_MPLS) | |
1890 | zlog_debug("Update client label %u", fec->label); | |
1891 | fec_send(fec, client); | |
1892 | } | |
1893 | ||
1894 | if (new_client || label_change) | |
1895 | return fec_change_update_lsp(zvrf, fec, old_label); | |
1896 | ||
1897 | return 0; | |
1898 | } | |
1899 | ||
1900 | /* | |
1901 | * Deregistration from a client for the label binding for a FEC. The FEC | |
1902 | * itself is deleted if no other registered clients exist and there is no | |
1903 | * label bound to the FEC. | |
1904 | */ | |
1905 | int zebra_mpls_fec_unregister(struct zebra_vrf *zvrf, struct prefix *p, | |
1906 | struct zserv *client) | |
1907 | { | |
1908 | struct route_table *table; | |
1909 | zebra_fec_t *fec; | |
1910 | char buf[BUFSIZ]; | |
1911 | ||
1912 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
1913 | if (!table) | |
1914 | return -1; | |
1915 | ||
1916 | if (IS_ZEBRA_DEBUG_MPLS) | |
1917 | prefix2str(p, buf, BUFSIZ); | |
1918 | ||
1919 | fec = fec_find(table, p); | |
1920 | if (!fec) { | |
1921 | prefix2str(p, buf, BUFSIZ); | |
1922 | flog_err(EC_ZEBRA_FEC_RM_FAILED, | |
1923 | "Failed to find FEC %s upon unregister, client %s", | |
1924 | buf, zebra_route_string(client->proto)); | |
1925 | return -1; | |
1926 | } | |
1927 | ||
1928 | listnode_delete(fec->client_list, client); | |
1929 | ||
1930 | if (IS_ZEBRA_DEBUG_MPLS) | |
1931 | zlog_debug("FEC %s unregistered by client %s", buf, | |
1932 | zebra_route_string(client->proto)); | |
1933 | ||
1934 | /* If not a configured entry, delete the FEC if no other clients. Before | |
1935 | * deleting, see if any LSP needs to be uninstalled. | |
1936 | */ | |
1937 | if (!(fec->flags & FEC_FLAG_CONFIGURED) | |
1938 | && list_isempty(fec->client_list)) { | |
1939 | mpls_label_t old_label = fec->label; | |
1940 | fec->label = MPLS_INVALID_LABEL; /* reset */ | |
1941 | fec_change_update_lsp(zvrf, fec, old_label); | |
1942 | fec_del(fec); | |
1943 | } | |
1944 | ||
1945 | return 0; | |
1946 | } | |
1947 | ||
1948 | /* | |
1949 | * Cleanup any FECs registered by this client. | |
1950 | */ | |
1951 | static int zebra_mpls_cleanup_fecs_for_client(struct zserv *client) | |
1952 | { | |
1953 | struct zebra_vrf *zvrf = vrf_info_lookup(VRF_DEFAULT); | |
1954 | struct route_node *rn; | |
1955 | zebra_fec_t *fec; | |
1956 | struct listnode *node; | |
1957 | struct zserv *fec_client; | |
1958 | int af; | |
1959 | ||
1960 | for (af = AFI_IP; af < AFI_MAX; af++) { | |
1961 | if (zvrf->fec_table[af] == NULL) | |
1962 | continue; | |
1963 | ||
1964 | for (rn = route_top(zvrf->fec_table[af]); rn; | |
1965 | rn = route_next(rn)) { | |
1966 | fec = rn->info; | |
1967 | if (!fec || list_isempty(fec->client_list)) | |
1968 | continue; | |
1969 | ||
1970 | for (ALL_LIST_ELEMENTS_RO(fec->client_list, node, | |
1971 | fec_client)) { | |
1972 | if (fec_client == client) { | |
1973 | listnode_delete(fec->client_list, | |
1974 | fec_client); | |
1975 | if (!(fec->flags & FEC_FLAG_CONFIGURED) | |
1976 | && list_isempty(fec->client_list)) | |
1977 | fec_del(fec); | |
1978 | break; | |
1979 | } | |
1980 | } | |
1981 | } | |
1982 | } | |
1983 | ||
1984 | return 0; | |
1985 | } | |
1986 | ||
1987 | /* | |
1988 | * Return FEC (if any) to which this label is bound. | |
1989 | * Note: Only works for per-prefix binding and when the label is not | |
1990 | * implicit-null. | |
1991 | * TODO: Currently walks entire table, can optimize later with another | |
1992 | * hash.. | |
1993 | */ | |
1994 | zebra_fec_t *zebra_mpls_fec_for_label(struct zebra_vrf *zvrf, | |
1995 | mpls_label_t label) | |
1996 | { | |
1997 | struct route_node *rn; | |
1998 | zebra_fec_t *fec; | |
1999 | int af; | |
2000 | ||
2001 | for (af = AFI_IP; af < AFI_MAX; af++) { | |
2002 | if (zvrf->fec_table[af] == NULL) | |
2003 | continue; | |
2004 | ||
2005 | for (rn = route_top(zvrf->fec_table[af]); rn; | |
2006 | rn = route_next(rn)) { | |
2007 | if (!rn->info) | |
2008 | continue; | |
2009 | fec = rn->info; | |
2010 | if (fec->label == label) | |
2011 | return fec; | |
2012 | } | |
2013 | } | |
2014 | ||
2015 | return NULL; | |
2016 | } | |
2017 | ||
2018 | /* | |
2019 | * Inform if specified label is currently bound to a FEC or not. | |
2020 | */ | |
2021 | int zebra_mpls_label_already_bound(struct zebra_vrf *zvrf, mpls_label_t label) | |
2022 | { | |
2023 | return (zebra_mpls_fec_for_label(zvrf, label) ? 1 : 0); | |
2024 | } | |
2025 | ||
2026 | /* | |
2027 | * Add static FEC to label binding. If there are clients registered for this | |
2028 | * FEC, notify them. If there are labeled routes for this FEC, install the | |
2029 | * label forwarding entry. | |
2030 | */ | |
2031 | int zebra_mpls_static_fec_add(struct zebra_vrf *zvrf, struct prefix *p, | |
2032 | mpls_label_t in_label) | |
2033 | { | |
2034 | struct route_table *table; | |
2035 | zebra_fec_t *fec; | |
2036 | char buf[BUFSIZ]; | |
2037 | mpls_label_t old_label; | |
2038 | int ret = 0; | |
2039 | ||
2040 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
2041 | if (!table) | |
2042 | return -1; | |
2043 | ||
2044 | if (IS_ZEBRA_DEBUG_MPLS) | |
2045 | prefix2str(p, buf, BUFSIZ); | |
2046 | ||
2047 | /* Update existing FEC or create a new one. */ | |
2048 | fec = fec_find(table, p); | |
2049 | if (!fec) { | |
2050 | fec = fec_add(table, p, in_label, FEC_FLAG_CONFIGURED, | |
2051 | MPLS_INVALID_LABEL_INDEX); | |
2052 | if (!fec) { | |
2053 | prefix2str(p, buf, BUFSIZ); | |
2054 | flog_err(EC_ZEBRA_FEC_ADD_FAILED, | |
2055 | "Failed to add FEC %s upon config", buf); | |
2056 | return -1; | |
2057 | } | |
2058 | ||
2059 | if (IS_ZEBRA_DEBUG_MPLS) | |
2060 | zlog_debug("Add fec %s label %u", buf, in_label); | |
2061 | } else { | |
2062 | fec->flags |= FEC_FLAG_CONFIGURED; | |
2063 | if (fec->label == in_label) | |
2064 | /* Duplicate config */ | |
2065 | return 0; | |
2066 | ||
2067 | /* Label change, update clients. */ | |
2068 | old_label = fec->label; | |
2069 | if (IS_ZEBRA_DEBUG_MPLS) | |
2070 | zlog_debug("Update fec %s new label %u", buf, in_label); | |
2071 | ||
2072 | fec->label = in_label; | |
2073 | fec_update_clients(fec); | |
2074 | ||
2075 | /* Update label forwarding entries appropriately */ | |
2076 | ret = fec_change_update_lsp(zvrf, fec, old_label); | |
2077 | } | |
2078 | ||
2079 | return ret; | |
2080 | } | |
2081 | ||
2082 | /* | |
2083 | * Remove static FEC to label binding. If there are no clients registered | |
2084 | * for this FEC, delete the FEC; else notify clients | |
2085 | * Note: Upon delete of static binding, if label index exists for this FEC, | |
2086 | * client may need to be updated with derived label. | |
2087 | */ | |
2088 | int zebra_mpls_static_fec_del(struct zebra_vrf *zvrf, struct prefix *p) | |
2089 | { | |
2090 | struct route_table *table; | |
2091 | zebra_fec_t *fec; | |
2092 | mpls_label_t old_label; | |
2093 | char buf[BUFSIZ]; | |
2094 | ||
2095 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
2096 | if (!table) | |
2097 | return -1; | |
2098 | ||
2099 | fec = fec_find(table, p); | |
2100 | if (!fec) { | |
2101 | prefix2str(p, buf, BUFSIZ); | |
2102 | flog_err(EC_ZEBRA_FEC_RM_FAILED, | |
2103 | "Failed to find FEC %s upon delete", buf); | |
2104 | return -1; | |
2105 | } | |
2106 | ||
2107 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2108 | prefix2str(p, buf, BUFSIZ); | |
2109 | zlog_debug("Delete fec %s label index %u", buf, | |
2110 | fec->label_index); | |
2111 | } | |
2112 | ||
2113 | old_label = fec->label; | |
2114 | fec->flags &= ~FEC_FLAG_CONFIGURED; | |
2115 | fec->label = MPLS_INVALID_LABEL; | |
2116 | ||
2117 | /* If no client exists, just delete the FEC. */ | |
2118 | if (list_isempty(fec->client_list)) { | |
2119 | fec_del(fec); | |
2120 | return 0; | |
2121 | } | |
2122 | ||
2123 | /* Derive the local label (from label index) or reset it. */ | |
2124 | fec_derive_label_from_index(zvrf, fec); | |
2125 | ||
2126 | /* If there is a label change, update clients. */ | |
2127 | if (fec->label == old_label) | |
2128 | return 0; | |
2129 | fec_update_clients(fec); | |
2130 | ||
2131 | /* Update label forwarding entries appropriately */ | |
2132 | return fec_change_update_lsp(zvrf, fec, old_label); | |
2133 | } | |
2134 | ||
2135 | /* | |
2136 | * Display MPLS FEC to label binding configuration (VTY command handler). | |
2137 | */ | |
2138 | int zebra_mpls_write_fec_config(struct vty *vty, struct zebra_vrf *zvrf) | |
2139 | { | |
2140 | struct route_node *rn; | |
2141 | int af; | |
2142 | zebra_fec_t *fec; | |
2143 | char buf[BUFSIZ]; | |
2144 | int write = 0; | |
2145 | ||
2146 | for (af = AFI_IP; af < AFI_MAX; af++) { | |
2147 | if (zvrf->fec_table[af] == NULL) | |
2148 | continue; | |
2149 | ||
2150 | for (rn = route_top(zvrf->fec_table[af]); rn; | |
2151 | rn = route_next(rn)) { | |
2152 | if (!rn->info) | |
2153 | continue; | |
2154 | ||
2155 | char lstr[BUFSIZ]; | |
2156 | fec = rn->info; | |
2157 | ||
2158 | if (!(fec->flags & FEC_FLAG_CONFIGURED)) | |
2159 | continue; | |
2160 | ||
2161 | write = 1; | |
2162 | prefix2str(&rn->p, buf, BUFSIZ); | |
2163 | vty_out(vty, "mpls label bind %s %s\n", buf, | |
2164 | label2str(fec->label, lstr, BUFSIZ)); | |
2165 | } | |
2166 | } | |
2167 | ||
2168 | return write; | |
2169 | } | |
2170 | ||
2171 | /* | |
2172 | * Display MPLS FEC to label binding (VTY command handler). | |
2173 | */ | |
2174 | void zebra_mpls_print_fec_table(struct vty *vty, struct zebra_vrf *zvrf) | |
2175 | { | |
2176 | struct route_node *rn; | |
2177 | int af; | |
2178 | ||
2179 | for (af = AFI_IP; af < AFI_MAX; af++) { | |
2180 | if (zvrf->fec_table[af] == NULL) | |
2181 | continue; | |
2182 | ||
2183 | for (rn = route_top(zvrf->fec_table[af]); rn; | |
2184 | rn = route_next(rn)) { | |
2185 | if (!rn->info) | |
2186 | continue; | |
2187 | fec_print(rn->info, vty); | |
2188 | } | |
2189 | } | |
2190 | } | |
2191 | ||
2192 | /* | |
2193 | * Display MPLS FEC to label binding for a specific FEC (VTY command handler). | |
2194 | */ | |
2195 | void zebra_mpls_print_fec(struct vty *vty, struct zebra_vrf *zvrf, | |
2196 | struct prefix *p) | |
2197 | { | |
2198 | struct route_table *table; | |
2199 | struct route_node *rn; | |
2200 | ||
2201 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
2202 | if (!table) | |
2203 | return; | |
2204 | ||
2205 | apply_mask(p); | |
2206 | rn = route_node_lookup(table, p); | |
2207 | if (!rn) | |
2208 | return; | |
2209 | ||
2210 | route_unlock_node(rn); | |
2211 | if (!rn->info) | |
2212 | return; | |
2213 | ||
2214 | fec_print(rn->info, vty); | |
2215 | } | |
2216 | ||
2217 | static bool mpls_ftn_update_nexthop(int add, struct nexthop *nexthop, | |
2218 | enum lsp_types_t type, mpls_label_t label) | |
2219 | { | |
2220 | if (add && nexthop->nh_label_type == ZEBRA_LSP_NONE) | |
2221 | nexthop_add_labels(nexthop, type, 1, &label); | |
2222 | else if (!add && nexthop->nh_label_type == type) | |
2223 | nexthop_del_labels(nexthop); | |
2224 | else | |
2225 | return false; | |
2226 | ||
2227 | return true; | |
2228 | } | |
2229 | ||
2230 | /* | |
2231 | * Install/uninstall a FEC-To-NHLFE (FTN) binding. | |
2232 | */ | |
2233 | int mpls_ftn_update(int add, struct zebra_vrf *zvrf, enum lsp_types_t type, | |
2234 | struct prefix *prefix, enum nexthop_types_t gtype, | |
2235 | union g_addr *gate, ifindex_t ifindex, uint8_t distance, | |
2236 | mpls_label_t out_label) | |
2237 | { | |
2238 | struct route_table *table; | |
2239 | struct route_node *rn; | |
2240 | struct route_entry *re; | |
2241 | struct nexthop *nexthop; | |
2242 | bool found; | |
2243 | ||
2244 | /* Lookup table. */ | |
2245 | table = zebra_vrf_table(family2afi(prefix->family), SAFI_UNICAST, | |
2246 | zvrf_id(zvrf)); | |
2247 | if (!table) | |
2248 | return -1; | |
2249 | ||
2250 | /* Lookup existing route */ | |
2251 | rn = route_node_get(table, prefix); | |
2252 | RNODE_FOREACH_RE (rn, re) { | |
2253 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
2254 | continue; | |
2255 | if (re->distance == distance) | |
2256 | break; | |
2257 | } | |
2258 | ||
2259 | if (re == NULL) | |
2260 | return -1; | |
2261 | ||
2262 | found = false; | |
2263 | for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) { | |
2264 | switch (nexthop->type) { | |
2265 | case NEXTHOP_TYPE_IPV4: | |
2266 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
2267 | if (gtype != NEXTHOP_TYPE_IPV4 | |
2268 | && gtype != NEXTHOP_TYPE_IPV4_IFINDEX) | |
2269 | continue; | |
2270 | if (!IPV4_ADDR_SAME(&nexthop->gate.ipv4, &gate->ipv4)) | |
2271 | continue; | |
2272 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
2273 | && nexthop->ifindex != ifindex) | |
2274 | continue; | |
2275 | if (!mpls_ftn_update_nexthop(add, nexthop, type, | |
2276 | out_label)) | |
2277 | return 0; | |
2278 | found = true; | |
2279 | break; | |
2280 | case NEXTHOP_TYPE_IPV6: | |
2281 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
2282 | if (gtype != NEXTHOP_TYPE_IPV6 | |
2283 | && gtype != NEXTHOP_TYPE_IPV6_IFINDEX) | |
2284 | continue; | |
2285 | if (!IPV6_ADDR_SAME(&nexthop->gate.ipv6, &gate->ipv6)) | |
2286 | continue; | |
2287 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
2288 | && nexthop->ifindex != ifindex) | |
2289 | continue; | |
2290 | if (!mpls_ftn_update_nexthop(add, nexthop, type, | |
2291 | out_label)) | |
2292 | return 0; | |
2293 | found = true; | |
2294 | break; | |
2295 | default: | |
2296 | break; | |
2297 | } | |
2298 | } | |
2299 | ||
2300 | if (!found) | |
2301 | return -1; | |
2302 | ||
2303 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
2304 | SET_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED); | |
2305 | rib_queue_add(rn); | |
2306 | ||
2307 | return 0; | |
2308 | } | |
2309 | ||
2310 | /* | |
2311 | * Install/update a NHLFE for an LSP in the forwarding table. This may be | |
2312 | * a new LSP entry or a new NHLFE for an existing in-label or an update of | |
2313 | * the out-label for an existing NHLFE (update case). | |
2314 | */ | |
2315 | int mpls_lsp_install(struct zebra_vrf *zvrf, enum lsp_types_t type, | |
2316 | mpls_label_t in_label, mpls_label_t out_label, | |
2317 | enum nexthop_types_t gtype, union g_addr *gate, | |
2318 | ifindex_t ifindex) | |
2319 | { | |
2320 | struct hash *lsp_table; | |
2321 | zebra_ile_t tmp_ile; | |
2322 | zebra_lsp_t *lsp; | |
2323 | zebra_nhlfe_t *nhlfe; | |
2324 | char buf[BUFSIZ]; | |
2325 | ||
2326 | /* Lookup table. */ | |
2327 | lsp_table = zvrf->lsp_table; | |
2328 | if (!lsp_table) | |
2329 | return -1; | |
2330 | ||
2331 | /* If entry is present, exit. */ | |
2332 | tmp_ile.in_label = in_label; | |
2333 | lsp = hash_get(lsp_table, &tmp_ile, lsp_alloc); | |
2334 | if (!lsp) | |
2335 | return -1; | |
2336 | nhlfe = nhlfe_find(lsp, type, gtype, gate, ifindex); | |
2337 | if (nhlfe) { | |
2338 | struct nexthop *nh = nhlfe->nexthop; | |
2339 | ||
2340 | assert(nh); | |
2341 | assert(nh->nh_label); | |
2342 | ||
2343 | /* Clear deleted flag (in case it was set) */ | |
2344 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
2345 | if (nh->nh_label->label[0] == out_label) | |
2346 | /* No change */ | |
2347 | return 0; | |
2348 | ||
2349 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2350 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
2351 | zlog_debug( | |
2352 | "LSP in-label %u type %d nexthop %s " | |
2353 | "out-label changed to %u (old %u)", | |
2354 | in_label, type, buf, out_label, | |
2355 | nh->nh_label->label[0]); | |
2356 | } | |
2357 | ||
2358 | /* Update out label, trigger processing. */ | |
2359 | nh->nh_label->label[0] = out_label; | |
2360 | } else { | |
2361 | /* Add LSP entry to this nexthop */ | |
2362 | nhlfe = nhlfe_add(lsp, type, gtype, gate, ifindex, out_label); | |
2363 | if (!nhlfe) | |
2364 | return -1; | |
2365 | ||
2366 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2367 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
2368 | zlog_debug( | |
2369 | "Add LSP in-label %u type %d nexthop %s " | |
2370 | "out-label %u", | |
2371 | in_label, type, buf, out_label); | |
2372 | } | |
2373 | ||
2374 | lsp->addr_family = NHLFE_FAMILY(nhlfe); | |
2375 | } | |
2376 | ||
2377 | /* Mark NHLFE, queue LSP for processing. */ | |
2378 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
2379 | if (lsp_processq_add(lsp)) | |
2380 | return -1; | |
2381 | ||
2382 | return 0; | |
2383 | } | |
2384 | ||
2385 | /* | |
2386 | * Uninstall a particular NHLFE in the forwarding table. If this is | |
2387 | * the only NHLFE, the entire LSP forwarding entry has to be deleted. | |
2388 | */ | |
2389 | int mpls_lsp_uninstall(struct zebra_vrf *zvrf, enum lsp_types_t type, | |
2390 | mpls_label_t in_label, enum nexthop_types_t gtype, | |
2391 | union g_addr *gate, ifindex_t ifindex) | |
2392 | { | |
2393 | struct hash *lsp_table; | |
2394 | zebra_ile_t tmp_ile; | |
2395 | zebra_lsp_t *lsp; | |
2396 | zebra_nhlfe_t *nhlfe; | |
2397 | char buf[BUFSIZ]; | |
2398 | ||
2399 | /* Lookup table. */ | |
2400 | lsp_table = zvrf->lsp_table; | |
2401 | if (!lsp_table) | |
2402 | return -1; | |
2403 | ||
2404 | /* If entry is not present, exit. */ | |
2405 | tmp_ile.in_label = in_label; | |
2406 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
2407 | if (!lsp) | |
2408 | return 0; | |
2409 | nhlfe = nhlfe_find(lsp, type, gtype, gate, ifindex); | |
2410 | if (!nhlfe) | |
2411 | return 0; | |
2412 | ||
2413 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2414 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
2415 | zlog_debug("Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
2416 | in_label, type, buf, nhlfe->flags); | |
2417 | } | |
2418 | ||
2419 | /* Mark NHLFE for delete or directly delete, as appropriate. */ | |
2420 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) { | |
2421 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
2422 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
2423 | if (lsp_processq_add(lsp)) | |
2424 | return -1; | |
2425 | } else { | |
2426 | nhlfe_del(nhlfe); | |
2427 | ||
2428 | /* Free LSP entry if no other NHLFEs and not scheduled. */ | |
2429 | if (!lsp->nhlfe_list | |
2430 | && !CHECK_FLAG(lsp->flags, LSP_FLAG_SCHEDULED)) { | |
2431 | if (IS_ZEBRA_DEBUG_MPLS) | |
2432 | zlog_debug("Free LSP in-label %u flags 0x%x", | |
2433 | lsp->ile.in_label, lsp->flags); | |
2434 | ||
2435 | lsp = hash_release(lsp_table, &lsp->ile); | |
2436 | if (lsp) | |
2437 | XFREE(MTYPE_LSP, lsp); | |
2438 | } | |
2439 | } | |
2440 | return 0; | |
2441 | } | |
2442 | ||
2443 | /* | |
2444 | * Uninstall all LDP NHLFEs for a particular LSP forwarding entry. | |
2445 | * If no other NHLFEs exist, the entry would be deleted. | |
2446 | */ | |
2447 | void mpls_ldp_lsp_uninstall_all(struct hash_backet *backet, void *ctxt) | |
2448 | { | |
2449 | zebra_lsp_t *lsp; | |
2450 | struct hash *lsp_table; | |
2451 | ||
2452 | lsp = (zebra_lsp_t *)backet->data; | |
2453 | if (!lsp->nhlfe_list) | |
2454 | return; | |
2455 | ||
2456 | lsp_table = ctxt; | |
2457 | if (!lsp_table) | |
2458 | return; | |
2459 | ||
2460 | mpls_lsp_uninstall_all(lsp_table, lsp, ZEBRA_LSP_LDP); | |
2461 | } | |
2462 | ||
2463 | /* | |
2464 | * Uninstall all LDP FEC-To-NHLFE (FTN) bindings of the given address-family. | |
2465 | */ | |
2466 | void mpls_ldp_ftn_uninstall_all(struct zebra_vrf *zvrf, int afi) | |
2467 | { | |
2468 | struct route_table *table; | |
2469 | struct route_node *rn; | |
2470 | struct route_entry *re; | |
2471 | struct nexthop *nexthop; | |
2472 | int update; | |
2473 | ||
2474 | /* Process routes of interested address-families. */ | |
2475 | table = zebra_vrf_table(afi, SAFI_UNICAST, zvrf_id(zvrf)); | |
2476 | if (!table) | |
2477 | return; | |
2478 | ||
2479 | for (rn = route_top(table); rn; rn = route_next(rn)) { | |
2480 | update = 0; | |
2481 | RNODE_FOREACH_RE (rn, re) { | |
2482 | for (nexthop = re->ng.nexthop; nexthop; | |
2483 | nexthop = nexthop->next) { | |
2484 | if (nexthop->nh_label_type != ZEBRA_LSP_LDP) | |
2485 | continue; | |
2486 | ||
2487 | nexthop_del_labels(nexthop); | |
2488 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
2489 | SET_FLAG(re->status, | |
2490 | ROUTE_ENTRY_LABELS_CHANGED); | |
2491 | update = 1; | |
2492 | } | |
2493 | } | |
2494 | ||
2495 | if (update) | |
2496 | rib_queue_add(rn); | |
2497 | } | |
2498 | } | |
2499 | ||
2500 | #if defined(HAVE_CUMULUS) | |
2501 | /* | |
2502 | * Check that the label values used in LSP creation are consistent. The | |
2503 | * main criteria is that if there is ECMP, the label operation must still | |
2504 | * be consistent - i.e., all paths either do a swap or do PHP. This is due | |
2505 | * to current HW restrictions. | |
2506 | */ | |
2507 | int zebra_mpls_lsp_label_consistent(struct zebra_vrf *zvrf, | |
2508 | mpls_label_t in_label, | |
2509 | mpls_label_t out_label, | |
2510 | enum nexthop_types_t gtype, | |
2511 | union g_addr *gate, ifindex_t ifindex) | |
2512 | { | |
2513 | struct hash *slsp_table; | |
2514 | zebra_ile_t tmp_ile; | |
2515 | zebra_slsp_t *slsp; | |
2516 | zebra_snhlfe_t *snhlfe; | |
2517 | ||
2518 | /* Lookup table. */ | |
2519 | slsp_table = zvrf->slsp_table; | |
2520 | if (!slsp_table) | |
2521 | return 0; | |
2522 | ||
2523 | /* If entry is not present, exit. */ | |
2524 | tmp_ile.in_label = in_label; | |
2525 | slsp = hash_lookup(slsp_table, &tmp_ile); | |
2526 | if (!slsp) | |
2527 | return 1; | |
2528 | ||
2529 | snhlfe = snhlfe_find(slsp, gtype, gate, ifindex); | |
2530 | if (snhlfe) { | |
2531 | if (snhlfe->out_label == out_label) | |
2532 | return 1; | |
2533 | ||
2534 | /* If not only NHLFE, cannot allow label change. */ | |
2535 | if (snhlfe != slsp->snhlfe_list || snhlfe->next) | |
2536 | return 0; | |
2537 | } else { | |
2538 | /* If other NHLFEs exist, label operation must match. */ | |
2539 | if (slsp->snhlfe_list) { | |
2540 | int cur_op, new_op; | |
2541 | ||
2542 | cur_op = (slsp->snhlfe_list->out_label | |
2543 | == MPLS_LABEL_IMPLICIT_NULL); | |
2544 | new_op = (out_label == MPLS_LABEL_IMPLICIT_NULL); | |
2545 | if (cur_op != new_op) | |
2546 | return 0; | |
2547 | } | |
2548 | } | |
2549 | ||
2550 | /* Label values are good. */ | |
2551 | return 1; | |
2552 | } | |
2553 | #endif /* HAVE_CUMULUS */ | |
2554 | ||
2555 | /* | |
2556 | * Add static LSP entry. This may be the first entry for this incoming label | |
2557 | * or an additional nexthop; an existing entry may also have outgoing label | |
2558 | * changed. | |
2559 | * Note: The label operation (swap or PHP) is common for the LSP entry (all | |
2560 | * NHLFEs). | |
2561 | */ | |
2562 | int zebra_mpls_static_lsp_add(struct zebra_vrf *zvrf, mpls_label_t in_label, | |
2563 | mpls_label_t out_label, | |
2564 | enum nexthop_types_t gtype, union g_addr *gate, | |
2565 | ifindex_t ifindex) | |
2566 | { | |
2567 | struct hash *slsp_table; | |
2568 | zebra_ile_t tmp_ile; | |
2569 | zebra_slsp_t *slsp; | |
2570 | zebra_snhlfe_t *snhlfe; | |
2571 | char buf[BUFSIZ]; | |
2572 | ||
2573 | /* Lookup table. */ | |
2574 | slsp_table = zvrf->slsp_table; | |
2575 | if (!slsp_table) | |
2576 | return -1; | |
2577 | ||
2578 | /* If entry is present, exit. */ | |
2579 | tmp_ile.in_label = in_label; | |
2580 | slsp = hash_get(slsp_table, &tmp_ile, slsp_alloc); | |
2581 | if (!slsp) | |
2582 | return -1; | |
2583 | snhlfe = snhlfe_find(slsp, gtype, gate, ifindex); | |
2584 | if (snhlfe) { | |
2585 | if (snhlfe->out_label == out_label) | |
2586 | /* No change */ | |
2587 | return 0; | |
2588 | ||
2589 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2590 | snhlfe2str(snhlfe, buf, BUFSIZ); | |
2591 | zlog_debug( | |
2592 | "Upd static LSP in-label %u nexthop %s " | |
2593 | "out-label %u (old %u)", | |
2594 | in_label, buf, out_label, snhlfe->out_label); | |
2595 | } | |
2596 | snhlfe->out_label = out_label; | |
2597 | } else { | |
2598 | /* Add static LSP entry to this nexthop */ | |
2599 | snhlfe = snhlfe_add(slsp, gtype, gate, ifindex, out_label); | |
2600 | if (!snhlfe) | |
2601 | return -1; | |
2602 | ||
2603 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2604 | snhlfe2str(snhlfe, buf, BUFSIZ); | |
2605 | zlog_debug( | |
2606 | "Add static LSP in-label %u nexthop %s out-label %u", | |
2607 | in_label, buf, out_label); | |
2608 | } | |
2609 | } | |
2610 | ||
2611 | /* (Re)Install LSP in the main table. */ | |
2612 | if (mpls_lsp_install(zvrf, ZEBRA_LSP_STATIC, in_label, out_label, gtype, | |
2613 | gate, ifindex)) | |
2614 | return -1; | |
2615 | ||
2616 | return 0; | |
2617 | } | |
2618 | ||
2619 | /* | |
2620 | * Delete static LSP entry. This may be the delete of one particular | |
2621 | * NHLFE for this incoming label or the delete of the entire entry (i.e., | |
2622 | * all NHLFEs). | |
2623 | * NOTE: Delete of the only NHLFE will also end up deleting the entire | |
2624 | * LSP configuration. | |
2625 | */ | |
2626 | int zebra_mpls_static_lsp_del(struct zebra_vrf *zvrf, mpls_label_t in_label, | |
2627 | enum nexthop_types_t gtype, union g_addr *gate, | |
2628 | ifindex_t ifindex) | |
2629 | { | |
2630 | struct hash *slsp_table; | |
2631 | zebra_ile_t tmp_ile; | |
2632 | zebra_slsp_t *slsp; | |
2633 | zebra_snhlfe_t *snhlfe; | |
2634 | ||
2635 | /* Lookup table. */ | |
2636 | slsp_table = zvrf->slsp_table; | |
2637 | if (!slsp_table) | |
2638 | return -1; | |
2639 | ||
2640 | /* If entry is not present, exit. */ | |
2641 | tmp_ile.in_label = in_label; | |
2642 | slsp = hash_lookup(slsp_table, &tmp_ile); | |
2643 | if (!slsp) | |
2644 | return 0; | |
2645 | ||
2646 | /* Is it delete of entire LSP or a specific NHLFE? */ | |
2647 | if (gtype == NEXTHOP_TYPE_BLACKHOLE) { | |
2648 | if (IS_ZEBRA_DEBUG_MPLS) | |
2649 | zlog_debug("Del static LSP in-label %u", in_label); | |
2650 | ||
2651 | /* Uninstall entire LSP from the main table. */ | |
2652 | mpls_static_lsp_uninstall_all(zvrf, in_label); | |
2653 | ||
2654 | /* Delete all static NHLFEs */ | |
2655 | snhlfe_del_all(slsp); | |
2656 | } else { | |
2657 | /* Find specific NHLFE, exit if not found. */ | |
2658 | snhlfe = snhlfe_find(slsp, gtype, gate, ifindex); | |
2659 | if (!snhlfe) | |
2660 | return 0; | |
2661 | ||
2662 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2663 | char buf[BUFSIZ]; | |
2664 | snhlfe2str(snhlfe, buf, BUFSIZ); | |
2665 | zlog_debug("Del static LSP in-label %u nexthop %s", | |
2666 | in_label, buf); | |
2667 | } | |
2668 | ||
2669 | /* Uninstall LSP from the main table. */ | |
2670 | mpls_lsp_uninstall(zvrf, ZEBRA_LSP_STATIC, in_label, gtype, | |
2671 | gate, ifindex); | |
2672 | ||
2673 | /* Delete static LSP NHLFE */ | |
2674 | snhlfe_del(snhlfe); | |
2675 | } | |
2676 | ||
2677 | /* Remove entire static LSP entry if no NHLFE - valid in either case | |
2678 | * above. */ | |
2679 | if (!slsp->snhlfe_list) { | |
2680 | slsp = hash_release(slsp_table, &tmp_ile); | |
2681 | if (slsp) | |
2682 | XFREE(MTYPE_SLSP, slsp); | |
2683 | } | |
2684 | ||
2685 | return 0; | |
2686 | } | |
2687 | ||
2688 | /* | |
2689 | * Schedule all MPLS label forwarding entries for processing. | |
2690 | * Called upon changes that may affect one or more of them such as | |
2691 | * interface or nexthop state changes. | |
2692 | */ | |
2693 | void zebra_mpls_lsp_schedule(struct zebra_vrf *zvrf) | |
2694 | { | |
2695 | if (!zvrf) | |
2696 | return; | |
2697 | hash_iterate(zvrf->lsp_table, lsp_schedule, NULL); | |
2698 | } | |
2699 | ||
2700 | /* | |
2701 | * Display MPLS label forwarding table for a specific LSP | |
2702 | * (VTY command handler). | |
2703 | */ | |
2704 | void zebra_mpls_print_lsp(struct vty *vty, struct zebra_vrf *zvrf, | |
2705 | mpls_label_t label, bool use_json) | |
2706 | { | |
2707 | struct hash *lsp_table; | |
2708 | zebra_lsp_t *lsp; | |
2709 | zebra_ile_t tmp_ile; | |
2710 | json_object *json = NULL; | |
2711 | ||
2712 | /* Lookup table. */ | |
2713 | lsp_table = zvrf->lsp_table; | |
2714 | if (!lsp_table) | |
2715 | return; | |
2716 | ||
2717 | /* If entry is not present, exit. */ | |
2718 | tmp_ile.in_label = label; | |
2719 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
2720 | if (!lsp) | |
2721 | return; | |
2722 | ||
2723 | if (use_json) { | |
2724 | json = lsp_json(lsp); | |
2725 | vty_out(vty, "%s\n", json_object_to_json_string_ext( | |
2726 | json, JSON_C_TO_STRING_PRETTY)); | |
2727 | json_object_free(json); | |
2728 | } else | |
2729 | lsp_print(lsp, (void *)vty); | |
2730 | } | |
2731 | ||
2732 | /* | |
2733 | * Display MPLS label forwarding table (VTY command handler). | |
2734 | */ | |
2735 | void zebra_mpls_print_lsp_table(struct vty *vty, struct zebra_vrf *zvrf, | |
2736 | bool use_json) | |
2737 | { | |
2738 | char buf[BUFSIZ]; | |
2739 | json_object *json = NULL; | |
2740 | zebra_lsp_t *lsp = NULL; | |
2741 | zebra_nhlfe_t *nhlfe = NULL; | |
2742 | struct nexthop *nexthop = NULL; | |
2743 | struct listnode *node = NULL; | |
2744 | struct list *lsp_list = hash_get_sorted_list(zvrf->lsp_table, lsp_cmp); | |
2745 | ||
2746 | if (use_json) { | |
2747 | json = json_object_new_object(); | |
2748 | ||
2749 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) | |
2750 | json_object_object_add( | |
2751 | json, label2str(lsp->ile.in_label, buf, BUFSIZ), | |
2752 | lsp_json(lsp)); | |
2753 | ||
2754 | vty_out(vty, "%s\n", json_object_to_json_string_ext( | |
2755 | json, JSON_C_TO_STRING_PRETTY)); | |
2756 | json_object_free(json); | |
2757 | } else { | |
2758 | vty_out(vty, " Inbound Outbound\n"); | |
2759 | vty_out(vty, " Label Type Nexthop Label\n"); | |
2760 | vty_out(vty, "-------- ------- --------------- --------\n"); | |
2761 | ||
2762 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) { | |
2763 | for (nhlfe = lsp->nhlfe_list; nhlfe; | |
2764 | nhlfe = nhlfe->next) { | |
2765 | vty_out(vty, "%8d %7s ", lsp->ile.in_label, | |
2766 | nhlfe_type2str(nhlfe->type)); | |
2767 | nexthop = nhlfe->nexthop; | |
2768 | ||
2769 | switch (nexthop->type) { | |
2770 | case NEXTHOP_TYPE_IFINDEX: { | |
2771 | struct zebra_ns *zns; | |
2772 | struct interface *ifp; | |
2773 | ||
2774 | zns = zebra_ns_lookup(NS_DEFAULT); | |
2775 | ifp = if_lookup_by_index_per_ns( | |
2776 | zns, | |
2777 | nexthop->ifindex); | |
2778 | vty_out(vty, "%15s", ifp->name); | |
2779 | break; | |
2780 | } | |
2781 | case NEXTHOP_TYPE_IPV4: | |
2782 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
2783 | vty_out(vty, "%15s", | |
2784 | inet_ntoa(nexthop->gate.ipv4)); | |
2785 | break; | |
2786 | case NEXTHOP_TYPE_IPV6: | |
2787 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
2788 | vty_out(vty, "%15s", | |
2789 | inet_ntop(AF_INET6, | |
2790 | &nexthop->gate.ipv6, | |
2791 | buf, BUFSIZ)); | |
2792 | break; | |
2793 | default: | |
2794 | break; | |
2795 | } | |
2796 | ||
2797 | if (nexthop->type != NEXTHOP_TYPE_IFINDEX) | |
2798 | vty_out(vty, " %8s\n", | |
2799 | mpls_label2str( | |
2800 | nexthop->nh_label | |
2801 | ->num_labels, | |
2802 | &nexthop->nh_label | |
2803 | ->label[0], | |
2804 | buf, BUFSIZ, 1)); | |
2805 | else | |
2806 | vty_out(vty, "\n"); | |
2807 | } | |
2808 | } | |
2809 | ||
2810 | vty_out(vty, "\n"); | |
2811 | } | |
2812 | ||
2813 | list_delete(&lsp_list); | |
2814 | } | |
2815 | ||
2816 | /* | |
2817 | * Display MPLS LSP configuration of all static LSPs (VTY command handler). | |
2818 | */ | |
2819 | int zebra_mpls_write_lsp_config(struct vty *vty, struct zebra_vrf *zvrf) | |
2820 | { | |
2821 | zebra_slsp_t *slsp; | |
2822 | zebra_snhlfe_t *snhlfe; | |
2823 | struct listnode *node; | |
2824 | struct list *slsp_list = | |
2825 | hash_get_sorted_list(zvrf->slsp_table, slsp_cmp); | |
2826 | ||
2827 | for (ALL_LIST_ELEMENTS_RO(slsp_list, node, slsp)) { | |
2828 | for (snhlfe = slsp->snhlfe_list; snhlfe; | |
2829 | snhlfe = snhlfe->next) { | |
2830 | char buf[BUFSIZ]; | |
2831 | char lstr[30]; | |
2832 | ||
2833 | snhlfe2str(snhlfe, buf, sizeof(buf)); | |
2834 | switch (snhlfe->out_label) { | |
2835 | case MPLS_LABEL_IPV4_EXPLICIT_NULL: | |
2836 | case MPLS_LABEL_IPV6_EXPLICIT_NULL: | |
2837 | strlcpy(lstr, "explicit-null", sizeof(lstr)); | |
2838 | break; | |
2839 | case MPLS_LABEL_IMPLICIT_NULL: | |
2840 | strlcpy(lstr, "implicit-null", sizeof(lstr)); | |
2841 | break; | |
2842 | default: | |
2843 | sprintf(lstr, "%u", snhlfe->out_label); | |
2844 | break; | |
2845 | } | |
2846 | ||
2847 | vty_out(vty, "mpls lsp %u %s %s\n", slsp->ile.in_label, | |
2848 | buf, lstr); | |
2849 | } | |
2850 | } | |
2851 | ||
2852 | list_delete(&slsp_list); | |
2853 | return (zvrf->slsp_table->count ? 1 : 0); | |
2854 | } | |
2855 | ||
2856 | /* | |
2857 | * Add/update global label block. | |
2858 | */ | |
2859 | int zebra_mpls_label_block_add(struct zebra_vrf *zvrf, uint32_t start_label, | |
2860 | uint32_t end_label) | |
2861 | { | |
2862 | zvrf->mpls_srgb.start_label = start_label; | |
2863 | zvrf->mpls_srgb.end_label = end_label; | |
2864 | ||
2865 | /* Evaluate registered FECs to see if any get a label or not. */ | |
2866 | fec_evaluate(zvrf); | |
2867 | return 0; | |
2868 | } | |
2869 | ||
2870 | /* | |
2871 | * Delete global label block. | |
2872 | */ | |
2873 | int zebra_mpls_label_block_del(struct zebra_vrf *zvrf) | |
2874 | { | |
2875 | zvrf->mpls_srgb.start_label = MPLS_DEFAULT_MIN_SRGB_LABEL; | |
2876 | zvrf->mpls_srgb.end_label = MPLS_DEFAULT_MAX_SRGB_LABEL; | |
2877 | ||
2878 | /* Process registered FECs to clear their local label, if needed. */ | |
2879 | fec_evaluate(zvrf); | |
2880 | return 0; | |
2881 | } | |
2882 | ||
2883 | /* | |
2884 | * Display MPLS global label block configuration (VTY command handler). | |
2885 | */ | |
2886 | int zebra_mpls_write_label_block_config(struct vty *vty, struct zebra_vrf *zvrf) | |
2887 | { | |
2888 | if (zvrf->mpls_srgb.start_label == 0) | |
2889 | return 0; | |
2890 | ||
2891 | if ((zvrf->mpls_srgb.start_label != MPLS_DEFAULT_MIN_SRGB_LABEL) | |
2892 | || (zvrf->mpls_srgb.end_label != MPLS_DEFAULT_MAX_SRGB_LABEL)) { | |
2893 | vty_out(vty, "mpls label global-block %u %u\n", | |
2894 | zvrf->mpls_srgb.start_label, zvrf->mpls_srgb.end_label); | |
2895 | } | |
2896 | ||
2897 | return 1; | |
2898 | } | |
2899 | ||
2900 | /* | |
2901 | * Called when VRF becomes inactive, cleans up information but keeps | |
2902 | * the table itself. | |
2903 | * NOTE: Currently supported only for default VRF. | |
2904 | */ | |
2905 | void zebra_mpls_cleanup_tables(struct zebra_vrf *zvrf) | |
2906 | { | |
2907 | hash_iterate(zvrf->lsp_table, lsp_uninstall_from_kernel, NULL); | |
2908 | } | |
2909 | ||
2910 | /* | |
2911 | * Called upon process exiting, need to delete LSP forwarding | |
2912 | * entries from the kernel. | |
2913 | * NOTE: Currently supported only for default VRF. | |
2914 | */ | |
2915 | void zebra_mpls_close_tables(struct zebra_vrf *zvrf) | |
2916 | { | |
2917 | hash_iterate(zvrf->lsp_table, lsp_uninstall_from_kernel, NULL); | |
2918 | hash_clean(zvrf->lsp_table, NULL); | |
2919 | hash_free(zvrf->lsp_table); | |
2920 | hash_clean(zvrf->slsp_table, NULL); | |
2921 | hash_free(zvrf->slsp_table); | |
2922 | route_table_finish(zvrf->fec_table[AFI_IP]); | |
2923 | route_table_finish(zvrf->fec_table[AFI_IP6]); | |
2924 | } | |
2925 | ||
2926 | /* | |
2927 | * Allocate MPLS tables for this VRF and do other initialization. | |
2928 | * NOTE: Currently supported only for default VRF. | |
2929 | */ | |
2930 | void zebra_mpls_init_tables(struct zebra_vrf *zvrf) | |
2931 | { | |
2932 | if (!zvrf) | |
2933 | return; | |
2934 | zvrf->slsp_table = | |
2935 | hash_create(label_hash, label_cmp, "ZEBRA SLSP table"); | |
2936 | zvrf->lsp_table = hash_create(label_hash, label_cmp, "ZEBRA LSP table"); | |
2937 | zvrf->fec_table[AFI_IP] = route_table_init(); | |
2938 | zvrf->fec_table[AFI_IP6] = route_table_init(); | |
2939 | zvrf->mpls_flags = 0; | |
2940 | zvrf->mpls_srgb.start_label = MPLS_DEFAULT_MIN_SRGB_LABEL; | |
2941 | zvrf->mpls_srgb.end_label = MPLS_DEFAULT_MAX_SRGB_LABEL; | |
2942 | } | |
2943 | ||
2944 | /* | |
2945 | * Global MPLS initialization. | |
2946 | */ | |
2947 | void zebra_mpls_init(void) | |
2948 | { | |
2949 | mpls_enabled = 0; | |
2950 | ||
2951 | if (mpls_kernel_init() < 0) { | |
2952 | flog_warn(EC_ZEBRA_MPLS_SUPPORT_DISABLED, | |
2953 | "Disabling MPLS support (no kernel support)"); | |
2954 | return; | |
2955 | } | |
2956 | ||
2957 | if (!mpls_processq_init(&zebrad)) | |
2958 | mpls_enabled = 1; | |
2959 | ||
2960 | hook_register(zserv_client_close, zebra_mpls_cleanup_fecs_for_client); | |
2961 | } |