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7758e3f3 | 1 | /* Zebra MPLS code |
2 | * Copyright (C) 2013 Cumulus Networks, Inc. | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
7758e3f3 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "prefix.h" | |
24 | #include "table.h" | |
25 | #include "memory.h" | |
7758e3f3 | 26 | #include "command.h" |
27 | #include "if.h" | |
28 | #include "log.h" | |
29 | #include "sockunion.h" | |
30 | #include "linklist.h" | |
31 | #include "thread.h" | |
32 | #include "workqueue.h" | |
33 | #include "prefix.h" | |
34 | #include "routemap.h" | |
35 | #include "stream.h" | |
36 | #include "nexthop.h" | |
b78b820d | 37 | #include "lib/json.h" |
7758e3f3 | 38 | |
39 | #include "zebra/rib.h" | |
40 | #include "zebra/rt.h" | |
41 | #include "zebra/zserv.h" | |
42 | #include "zebra/redistribute.h" | |
43 | #include "zebra/debug.h" | |
44 | #include "zebra/zebra_memory.h" | |
45 | #include "zebra/zebra_vrf.h" | |
46 | #include "zebra/zebra_mpls.h" | |
47 | ||
d62a17ae | 48 | DEFINE_MTYPE_STATIC(ZEBRA, LSP, "MPLS LSP object") |
49 | DEFINE_MTYPE_STATIC(ZEBRA, FEC, "MPLS FEC object") | |
50 | DEFINE_MTYPE_STATIC(ZEBRA, SLSP, "MPLS static LSP config") | |
51 | DEFINE_MTYPE_STATIC(ZEBRA, NHLFE, "MPLS nexthop object") | |
52 | DEFINE_MTYPE_STATIC(ZEBRA, SNHLFE, "MPLS static nexthop object") | |
53 | DEFINE_MTYPE_STATIC(ZEBRA, SNHLFE_IFNAME, "MPLS static nexthop ifname") | |
7758e3f3 | 54 | |
fe6c7157 RW |
55 | int mpls_enabled; |
56 | ||
7758e3f3 | 57 | /* Default rtm_table for all clients */ |
58 | extern struct zebra_t zebrad; | |
59 | ||
60 | /* static function declarations */ | |
f31e084c | 61 | |
d62a17ae | 62 | static void fec_evaluate(struct zebra_vrf *zvrf); |
d7c0a89a QY |
63 | static uint32_t fec_derive_label_from_index(struct zebra_vrf *vrf, |
64 | zebra_fec_t *fec); | |
d62a17ae | 65 | static int lsp_install(struct zebra_vrf *zvrf, mpls_label_t label, |
66 | struct route_node *rn, struct route_entry *re); | |
67 | static int lsp_uninstall(struct zebra_vrf *zvrf, mpls_label_t label); | |
68 | static int fec_change_update_lsp(struct zebra_vrf *zvrf, zebra_fec_t *fec, | |
69 | mpls_label_t old_label); | |
70 | static int fec_send(zebra_fec_t *fec, struct zserv *client); | |
71 | static void fec_update_clients(zebra_fec_t *fec); | |
72 | static void fec_print(zebra_fec_t *fec, struct vty *vty); | |
73 | static zebra_fec_t *fec_find(struct route_table *table, struct prefix *p); | |
74 | static zebra_fec_t *fec_add(struct route_table *table, struct prefix *p, | |
d7c0a89a QY |
75 | mpls_label_t label, uint32_t flags, |
76 | uint32_t label_index); | |
d62a17ae | 77 | static int fec_del(zebra_fec_t *fec); |
78 | ||
79 | static unsigned int label_hash(void *p); | |
80 | static int label_cmp(const void *p1, const void *p2); | |
81 | static int nhlfe_nexthop_active_ipv4(zebra_nhlfe_t *nhlfe, | |
82 | struct nexthop *nexthop); | |
83 | static int nhlfe_nexthop_active_ipv6(zebra_nhlfe_t *nhlfe, | |
84 | struct nexthop *nexthop); | |
85 | static int nhlfe_nexthop_active(zebra_nhlfe_t *nhlfe); | |
86 | ||
87 | static void lsp_select_best_nhlfe(zebra_lsp_t *lsp); | |
88 | static void lsp_uninstall_from_kernel(struct hash_backet *backet, void *ctxt); | |
89 | static void lsp_schedule(struct hash_backet *backet, void *ctxt); | |
90 | static wq_item_status lsp_process(struct work_queue *wq, void *data); | |
91 | static void lsp_processq_del(struct work_queue *wq, void *data); | |
92 | static void lsp_processq_complete(struct work_queue *wq); | |
93 | static int lsp_processq_add(zebra_lsp_t *lsp); | |
94 | static void *lsp_alloc(void *p); | |
95 | ||
96 | static char *nhlfe2str(zebra_nhlfe_t *nhlfe, char *buf, int size); | |
97 | static int nhlfe_nhop_match(zebra_nhlfe_t *nhlfe, enum nexthop_types_t gtype, | |
98 | union g_addr *gate, ifindex_t ifindex); | |
99 | static zebra_nhlfe_t *nhlfe_find(zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
100 | enum nexthop_types_t gtype, union g_addr *gate, | |
101 | ifindex_t ifindex); | |
102 | static zebra_nhlfe_t *nhlfe_add(zebra_lsp_t *lsp, enum lsp_types_t lsp_type, | |
103 | enum nexthop_types_t gtype, union g_addr *gate, | |
104 | ifindex_t ifindex, mpls_label_t out_label); | |
105 | static int nhlfe_del(zebra_nhlfe_t *snhlfe); | |
106 | static void nhlfe_out_label_update(zebra_nhlfe_t *nhlfe, | |
8ecdb26e | 107 | struct mpls_label_stack *nh_label); |
d62a17ae | 108 | static int mpls_lsp_uninstall_all(struct hash *lsp_table, zebra_lsp_t *lsp, |
109 | enum lsp_types_t type); | |
110 | static int mpls_static_lsp_uninstall_all(struct zebra_vrf *zvrf, | |
111 | mpls_label_t in_label); | |
112 | static void nhlfe_print(zebra_nhlfe_t *nhlfe, struct vty *vty); | |
113 | static void lsp_print(zebra_lsp_t *lsp, void *ctxt); | |
114 | static void *slsp_alloc(void *p); | |
115 | static int snhlfe_match(zebra_snhlfe_t *snhlfe, enum nexthop_types_t gtype, | |
116 | union g_addr *gate, ifindex_t ifindex); | |
117 | static zebra_snhlfe_t *snhlfe_find(zebra_slsp_t *slsp, | |
118 | enum nexthop_types_t gtype, | |
119 | union g_addr *gate, ifindex_t ifindex); | |
120 | static zebra_snhlfe_t *snhlfe_add(zebra_slsp_t *slsp, | |
121 | enum nexthop_types_t gtype, | |
122 | union g_addr *gate, ifindex_t ifindex, | |
123 | mpls_label_t out_label); | |
124 | static int snhlfe_del(zebra_snhlfe_t *snhlfe); | |
125 | static int snhlfe_del_all(zebra_slsp_t *slsp); | |
126 | static char *snhlfe2str(zebra_snhlfe_t *snhlfe, char *buf, int size); | |
127 | static int mpls_processq_init(struct zebra_t *zebra); | |
7758e3f3 | 128 | |
129 | ||
130 | /* Static functions */ | |
131 | ||
3d468f66 DS |
132 | /* |
133 | * Handle failure in LSP install, clear flags for NHLFE. | |
134 | */ | |
135 | static void clear_nhlfe_installed(zebra_lsp_t *lsp) | |
136 | { | |
137 | zebra_nhlfe_t *nhlfe; | |
138 | struct nexthop *nexthop; | |
139 | ||
140 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
141 | nexthop = nhlfe->nexthop; | |
142 | if (!nexthop) | |
143 | continue; | |
144 | ||
145 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
146 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
147 | } | |
148 | } | |
149 | ||
a64448ba DS |
150 | /* |
151 | * Install label forwarding entry based on labeled-route entry. | |
152 | */ | |
d62a17ae | 153 | static int lsp_install(struct zebra_vrf *zvrf, mpls_label_t label, |
154 | struct route_node *rn, struct route_entry *re) | |
155 | { | |
156 | struct hash *lsp_table; | |
157 | zebra_ile_t tmp_ile; | |
158 | zebra_lsp_t *lsp; | |
159 | zebra_nhlfe_t *nhlfe; | |
160 | struct nexthop *nexthop; | |
161 | enum lsp_types_t lsp_type; | |
162 | char buf[BUFSIZ]; | |
163 | int added, changed; | |
164 | ||
165 | /* Lookup table. */ | |
166 | lsp_table = zvrf->lsp_table; | |
167 | if (!lsp_table) | |
168 | return -1; | |
169 | ||
170 | lsp_type = lsp_type_from_re_type(re->type); | |
171 | added = changed = 0; | |
172 | ||
173 | /* Locate or allocate LSP entry. */ | |
174 | tmp_ile.in_label = label; | |
175 | lsp = hash_get(lsp_table, &tmp_ile, lsp_alloc); | |
176 | if (!lsp) | |
177 | return -1; | |
178 | ||
179 | /* For each active nexthop, create NHLFE. Note that we deliberately skip | |
180 | * recursive nexthops right now, because intermediate hops won't | |
181 | * understand | |
182 | * the label advertised by the recursive nexthop (plus we don't have the | |
183 | * logic yet to push multiple labels). | |
184 | */ | |
7ee30f28 | 185 | for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) { |
d62a17ae | 186 | /* Skip inactive and recursive entries. */ |
187 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
188 | continue; | |
189 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
190 | continue; | |
191 | ||
192 | nhlfe = nhlfe_find(lsp, lsp_type, nexthop->type, &nexthop->gate, | |
193 | nexthop->ifindex); | |
194 | if (nhlfe) { | |
195 | /* Clear deleted flag (in case it was set) */ | |
196 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
197 | if (nexthop_labels_match(nhlfe->nexthop, nexthop)) | |
198 | /* No change */ | |
199 | continue; | |
200 | ||
201 | ||
202 | if (IS_ZEBRA_DEBUG_MPLS) { | |
203 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
204 | zlog_debug( | |
205 | "LSP in-label %u type %d nexthop %s " | |
206 | "out-label changed", | |
207 | lsp->ile.in_label, lsp_type, buf); | |
208 | } | |
209 | ||
210 | /* Update out label, trigger processing. */ | |
211 | nhlfe_out_label_update(nhlfe, nexthop->nh_label); | |
212 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
213 | changed++; | |
214 | } else { | |
215 | /* Add LSP entry to this nexthop */ | |
216 | nhlfe = nhlfe_add(lsp, lsp_type, nexthop->type, | |
217 | &nexthop->gate, nexthop->ifindex, | |
218 | nexthop->nh_label->label[0]); | |
219 | if (!nhlfe) | |
220 | return -1; | |
221 | ||
222 | if (IS_ZEBRA_DEBUG_MPLS) { | |
223 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
224 | zlog_debug( | |
225 | "Add LSP in-label %u type %d nexthop %s " | |
226 | "out-label %u", | |
227 | lsp->ile.in_label, lsp_type, buf, | |
228 | nexthop->nh_label->label[0]); | |
229 | } | |
230 | ||
231 | lsp->addr_family = NHLFE_FAMILY(nhlfe); | |
232 | ||
233 | /* Mark NHLFE as changed. */ | |
234 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
235 | added++; | |
236 | } | |
237 | } | |
238 | ||
239 | /* Queue LSP for processing if necessary. If no NHLFE got added (special | |
240 | * case), delete the LSP entry; this case results in somewhat ugly | |
241 | * logging. | |
242 | */ | |
243 | if (added || changed) { | |
244 | if (lsp_processq_add(lsp)) | |
245 | return -1; | |
246 | } else if (!lsp->nhlfe_list | |
247 | && !CHECK_FLAG(lsp->flags, LSP_FLAG_SCHEDULED)) { | |
248 | if (IS_ZEBRA_DEBUG_MPLS) | |
249 | zlog_debug("Free LSP in-label %u flags 0x%x", | |
250 | lsp->ile.in_label, lsp->flags); | |
251 | ||
252 | lsp = hash_release(lsp_table, &lsp->ile); | |
253 | if (lsp) | |
254 | XFREE(MTYPE_LSP, lsp); | |
255 | } | |
256 | ||
257 | return 0; | |
a64448ba DS |
258 | } |
259 | ||
260 | /* | |
261 | * Uninstall all non-static NHLFEs of a label forwarding entry. If all | |
262 | * NHLFEs are removed, the entire entry is deleted. | |
263 | */ | |
d62a17ae | 264 | static int lsp_uninstall(struct zebra_vrf *zvrf, mpls_label_t label) |
265 | { | |
266 | struct hash *lsp_table; | |
267 | zebra_ile_t tmp_ile; | |
268 | zebra_lsp_t *lsp; | |
269 | zebra_nhlfe_t *nhlfe, *nhlfe_next; | |
270 | char buf[BUFSIZ]; | |
271 | ||
272 | /* Lookup table. */ | |
273 | lsp_table = zvrf->lsp_table; | |
274 | if (!lsp_table) | |
275 | return -1; | |
276 | ||
277 | /* If entry is not present, exit. */ | |
278 | tmp_ile.in_label = label; | |
279 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
280 | if (!lsp || !lsp->nhlfe_list) | |
281 | return 0; | |
282 | ||
283 | /* Mark NHLFEs for delete or directly delete, as appropriate. */ | |
284 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe_next) { | |
285 | nhlfe_next = nhlfe->next; | |
286 | ||
287 | /* Skip static NHLFEs */ | |
288 | if (nhlfe->type == ZEBRA_LSP_STATIC) | |
289 | continue; | |
290 | ||
291 | if (IS_ZEBRA_DEBUG_MPLS) { | |
292 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
293 | zlog_debug( | |
294 | "Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
295 | label, nhlfe->type, buf, nhlfe->flags); | |
296 | } | |
297 | ||
298 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED)) { | |
299 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
300 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
301 | } else { | |
302 | nhlfe_del(nhlfe); | |
303 | } | |
304 | } | |
305 | ||
306 | /* Queue LSP for processing, if needed, else delete. */ | |
307 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) { | |
308 | if (lsp_processq_add(lsp)) | |
309 | return -1; | |
310 | } else if (!lsp->nhlfe_list | |
311 | && !CHECK_FLAG(lsp->flags, LSP_FLAG_SCHEDULED)) { | |
312 | if (IS_ZEBRA_DEBUG_MPLS) | |
313 | zlog_debug("Del LSP in-label %u flags 0x%x", | |
314 | lsp->ile.in_label, lsp->flags); | |
315 | ||
316 | lsp = hash_release(lsp_table, &lsp->ile); | |
317 | if (lsp) | |
318 | XFREE(MTYPE_LSP, lsp); | |
319 | } | |
320 | ||
321 | return 0; | |
a64448ba DS |
322 | } |
323 | ||
28d58fd7 VV |
324 | /* |
325 | * This function is invoked upon change to label block configuration; it | |
326 | * will walk all registered FECs with label-index and appropriately update | |
327 | * their local labels and trigger client updates. | |
328 | */ | |
d62a17ae | 329 | static void fec_evaluate(struct zebra_vrf *zvrf) |
330 | { | |
331 | struct route_node *rn; | |
332 | zebra_fec_t *fec; | |
d7c0a89a | 333 | uint32_t old_label, new_label; |
d62a17ae | 334 | int af; |
335 | char buf[BUFSIZ]; | |
336 | ||
337 | for (af = AFI_IP; af < AFI_MAX; af++) { | |
338 | if (zvrf->fec_table[af] == NULL) | |
339 | continue; | |
340 | ||
341 | for (rn = route_top(zvrf->fec_table[af]); rn; | |
342 | rn = route_next(rn)) { | |
343 | if ((fec = rn->info) == NULL) | |
344 | continue; | |
345 | ||
346 | /* Skip configured FECs and those without a label index. | |
347 | */ | |
348 | if (fec->flags & FEC_FLAG_CONFIGURED | |
349 | || fec->label_index == MPLS_INVALID_LABEL_INDEX) | |
350 | continue; | |
351 | ||
352 | if (IS_ZEBRA_DEBUG_MPLS) | |
353 | prefix2str(&rn->p, buf, BUFSIZ); | |
354 | ||
355 | /* Save old label, determine new label. */ | |
356 | old_label = fec->label; | |
357 | new_label = | |
358 | zvrf->mpls_srgb.start_label + fec->label_index; | |
359 | if (new_label >= zvrf->mpls_srgb.end_label) | |
360 | new_label = MPLS_INVALID_LABEL; | |
361 | ||
362 | /* If label has changed, update FEC and clients. */ | |
363 | if (new_label == old_label) | |
364 | continue; | |
365 | ||
366 | if (IS_ZEBRA_DEBUG_MPLS) | |
367 | zlog_debug( | |
368 | "Update fec %s new label %u upon label block", | |
369 | buf, new_label); | |
370 | ||
371 | fec->label = new_label; | |
372 | fec_update_clients(fec); | |
373 | ||
374 | /* Update label forwarding entries appropriately */ | |
375 | fec_change_update_lsp(zvrf, fec, old_label); | |
376 | } | |
377 | } | |
28d58fd7 VV |
378 | } |
379 | ||
380 | /* | |
381 | * Derive (if possible) and update the local label for the FEC based on | |
382 | * its label index. The index is "acceptable" if it falls within the | |
383 | * globally configured label block (SRGB). | |
384 | */ | |
d7c0a89a QY |
385 | static uint32_t fec_derive_label_from_index(struct zebra_vrf *zvrf, |
386 | zebra_fec_t *fec) | |
28d58fd7 | 387 | { |
d7c0a89a | 388 | uint32_t label; |
28d58fd7 | 389 | |
d62a17ae | 390 | if (fec->label_index != MPLS_INVALID_LABEL_INDEX |
391 | && zvrf->mpls_srgb.start_label | |
392 | && ((label = zvrf->mpls_srgb.start_label + fec->label_index) | |
393 | < zvrf->mpls_srgb.end_label)) | |
394 | fec->label = label; | |
395 | else | |
396 | fec->label = MPLS_INVALID_LABEL; | |
28d58fd7 | 397 | |
d62a17ae | 398 | return fec->label; |
28d58fd7 VV |
399 | } |
400 | ||
a64448ba DS |
401 | /* |
402 | * There is a change for this FEC. Install or uninstall label forwarding | |
403 | * entries, as appropriate. | |
404 | */ | |
d62a17ae | 405 | static int fec_change_update_lsp(struct zebra_vrf *zvrf, zebra_fec_t *fec, |
406 | mpls_label_t old_label) | |
a64448ba | 407 | { |
d62a17ae | 408 | struct route_table *table; |
409 | struct route_node *rn; | |
410 | struct route_entry *re; | |
411 | afi_t afi; | |
a64448ba | 412 | |
d62a17ae | 413 | /* Uninstall label forwarding entry, if previously installed. */ |
996c9314 LB |
414 | if (old_label != MPLS_INVALID_LABEL |
415 | && old_label != MPLS_LABEL_IMPLICIT_NULL) | |
d62a17ae | 416 | lsp_uninstall(zvrf, old_label); |
a64448ba | 417 | |
d62a17ae | 418 | /* Install label forwarding entry corr. to new label, if needed. */ |
419 | if (fec->label == MPLS_INVALID_LABEL | |
70e98a7f | 420 | || fec->label == MPLS_LABEL_IMPLICIT_NULL) |
d62a17ae | 421 | return 0; |
a64448ba | 422 | |
d62a17ae | 423 | afi = family2afi(PREFIX_FAMILY(&fec->rn->p)); |
424 | table = zebra_vrf_table(afi, SAFI_UNICAST, zvrf_id(zvrf)); | |
425 | if (!table) | |
426 | return 0; | |
a64448ba | 427 | |
d62a17ae | 428 | /* See if labeled route exists. */ |
429 | rn = route_node_lookup(table, &fec->rn->p); | |
430 | if (!rn) | |
431 | return 0; | |
a64448ba | 432 | |
a2addae8 | 433 | RNODE_FOREACH_RE (rn, re) { |
d62a17ae | 434 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) |
435 | break; | |
436 | } | |
a64448ba | 437 | |
d62a17ae | 438 | if (!re || !zebra_rib_labeled_unicast(re)) |
439 | return 0; | |
a64448ba | 440 | |
d62a17ae | 441 | if (lsp_install(zvrf, fec->label, rn, re)) |
442 | return -1; | |
a64448ba | 443 | |
d62a17ae | 444 | return 0; |
a64448ba DS |
445 | } |
446 | ||
5aba114a DS |
447 | /* |
448 | * Inform about FEC to a registered client. | |
449 | */ | |
d62a17ae | 450 | static int fec_send(zebra_fec_t *fec, struct zserv *client) |
5aba114a | 451 | { |
d62a17ae | 452 | struct stream *s; |
453 | struct route_node *rn; | |
5aba114a | 454 | |
d62a17ae | 455 | rn = fec->rn; |
5aba114a | 456 | |
d62a17ae | 457 | /* Get output stream. */ |
1002497a | 458 | s = stream_new(ZEBRA_MAX_PACKET_SIZ); |
5aba114a | 459 | |
7cf15b25 | 460 | zclient_create_header(s, ZEBRA_FEC_UPDATE, VRF_DEFAULT); |
5aba114a | 461 | |
d62a17ae | 462 | stream_putw(s, rn->p.family); |
463 | stream_put_prefix(s, &rn->p); | |
464 | stream_putl(s, fec->label); | |
465 | stream_putw_at(s, 0, stream_get_endp(s)); | |
21ccc0cf | 466 | return zserv_send_message(client, s); |
5aba114a DS |
467 | } |
468 | ||
469 | /* | |
470 | * Update all registered clients about this FEC. Caller should've updated | |
471 | * FEC and ensure no duplicate updates. | |
472 | */ | |
d62a17ae | 473 | static void fec_update_clients(zebra_fec_t *fec) |
5aba114a | 474 | { |
d62a17ae | 475 | struct listnode *node; |
476 | struct zserv *client; | |
5aba114a | 477 | |
d62a17ae | 478 | for (ALL_LIST_ELEMENTS_RO(fec->client_list, node, client)) { |
479 | if (IS_ZEBRA_DEBUG_MPLS) | |
480 | zlog_debug("Update client %s", | |
481 | zebra_route_string(client->proto)); | |
482 | fec_send(fec, client); | |
483 | } | |
5aba114a DS |
484 | } |
485 | ||
486 | ||
f31e084c DS |
487 | /* |
488 | * Print a FEC-label binding entry. | |
489 | */ | |
d62a17ae | 490 | static void fec_print(zebra_fec_t *fec, struct vty *vty) |
491 | { | |
492 | struct route_node *rn; | |
493 | struct listnode *node; | |
494 | struct zserv *client; | |
495 | char buf[BUFSIZ]; | |
496 | ||
497 | rn = fec->rn; | |
498 | prefix2str(&rn->p, buf, BUFSIZ); | |
499 | vty_out(vty, "%s\n", buf); | |
500 | vty_out(vty, " Label: %s", label2str(fec->label, buf, BUFSIZ)); | |
501 | if (fec->label_index != MPLS_INVALID_LABEL_INDEX) | |
502 | vty_out(vty, ", Label Index: %u", fec->label_index); | |
503 | vty_out(vty, "\n"); | |
504 | if (!list_isempty(fec->client_list)) { | |
505 | vty_out(vty, " Client list:"); | |
506 | for (ALL_LIST_ELEMENTS_RO(fec->client_list, node, client)) | |
507 | vty_out(vty, " %s(fd %d)", | |
508 | zebra_route_string(client->proto), | |
509 | client->sock); | |
510 | vty_out(vty, "\n"); | |
511 | } | |
f31e084c DS |
512 | } |
513 | ||
514 | /* | |
515 | * Locate FEC-label binding that matches with passed info. | |
516 | */ | |
d62a17ae | 517 | static zebra_fec_t *fec_find(struct route_table *table, struct prefix *p) |
f31e084c | 518 | { |
d62a17ae | 519 | struct route_node *rn; |
f31e084c | 520 | |
d62a17ae | 521 | apply_mask(p); |
522 | rn = route_node_lookup(table, p); | |
523 | if (!rn) | |
524 | return NULL; | |
f31e084c | 525 | |
d62a17ae | 526 | route_unlock_node(rn); |
527 | return (rn->info); | |
f31e084c DS |
528 | } |
529 | ||
530 | /* | |
5aba114a DS |
531 | * Add a FEC. This may be upon a client registering for a binding |
532 | * or when a binding is configured. | |
f31e084c | 533 | */ |
d62a17ae | 534 | static zebra_fec_t *fec_add(struct route_table *table, struct prefix *p, |
d7c0a89a QY |
535 | mpls_label_t label, uint32_t flags, |
536 | uint32_t label_index) | |
f31e084c | 537 | { |
d62a17ae | 538 | struct route_node *rn; |
539 | zebra_fec_t *fec; | |
f31e084c | 540 | |
d62a17ae | 541 | apply_mask(p); |
f31e084c | 542 | |
d62a17ae | 543 | /* Lookup (or add) route node.*/ |
544 | rn = route_node_get(table, p); | |
545 | if (!rn) | |
546 | return NULL; | |
f31e084c | 547 | |
d62a17ae | 548 | fec = rn->info; |
f31e084c | 549 | |
d62a17ae | 550 | if (!fec) { |
551 | fec = XCALLOC(MTYPE_FEC, sizeof(zebra_fec_t)); | |
552 | if (!fec) | |
553 | return NULL; | |
f31e084c | 554 | |
d62a17ae | 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 */ | |
f31e084c | 561 | |
d62a17ae | 562 | fec->label_index = label_index; |
563 | fec->flags = flags; | |
f31e084c | 564 | |
d62a17ae | 565 | return fec; |
f31e084c DS |
566 | } |
567 | ||
568 | /* | |
5aba114a DS |
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. | |
f31e084c | 572 | */ |
d62a17ae | 573 | static int fec_del(zebra_fec_t *fec) |
f31e084c | 574 | { |
acdf5e25 | 575 | list_delete_and_null(&fec->client_list); |
d62a17ae | 576 | fec->rn->info = NULL; |
577 | route_unlock_node(fec->rn); | |
578 | XFREE(MTYPE_FEC, fec); | |
579 | return 0; | |
f31e084c DS |
580 | } |
581 | ||
7758e3f3 | 582 | /* |
583 | * Hash function for label. | |
584 | */ | |
d62a17ae | 585 | static unsigned int label_hash(void *p) |
7758e3f3 | 586 | { |
d62a17ae | 587 | const zebra_ile_t *ile = p; |
7758e3f3 | 588 | |
d62a17ae | 589 | return (jhash_1word(ile->in_label, 0)); |
7758e3f3 | 590 | } |
591 | ||
592 | /* | |
593 | * Compare 2 LSP hash entries based on in-label. | |
594 | */ | |
d62a17ae | 595 | static int label_cmp(const void *p1, const void *p2) |
7758e3f3 | 596 | { |
d62a17ae | 597 | const zebra_ile_t *ile1 = p1; |
598 | const zebra_ile_t *ile2 = p2; | |
7758e3f3 | 599 | |
d62a17ae | 600 | return (ile1->in_label == ile2->in_label); |
7758e3f3 | 601 | } |
602 | ||
40c7bdb0 | 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 | */ | |
d62a17ae | 608 | static int nhlfe_nexthop_active_ipv4(zebra_nhlfe_t *nhlfe, |
609 | struct nexthop *nexthop) | |
40c7bdb0 | 610 | { |
d62a17ae | 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; | |
40c7bdb0 | 616 | |
4a7371e9 | 617 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, nexthop->vrf_id); |
d62a17ae | 618 | if (!table) |
619 | return 0; | |
40c7bdb0 | 620 | |
d62a17ae | 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; | |
40c7bdb0 | 626 | |
d62a17ae | 627 | rn = route_node_match(table, (struct prefix *)&p); |
628 | if (!rn) | |
629 | return 0; | |
40c7bdb0 | 630 | |
d62a17ae | 631 | route_unlock_node(rn); |
88d88a9c | 632 | |
d62a17ae | 633 | /* Locate a valid connected route. */ |
a2addae8 | 634 | RNODE_FOREACH_RE (rn, match) { |
d62a17ae | 635 | if (CHECK_FLAG(match->status, ROUTE_ENTRY_REMOVED) |
636 | || !CHECK_FLAG(match->flags, ZEBRA_FLAG_SELECTED)) | |
637 | continue; | |
638 | ||
7ee30f28 | 639 | for (match_nh = match->ng.nexthop; match_nh; |
d62a17ae | 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 | } | |
88d88a9c | 647 | } |
40c7bdb0 | 648 | |
d62a17ae | 649 | return 0; |
40c7bdb0 | 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 | */ | |
d62a17ae | 658 | static int nhlfe_nexthop_active_ipv6(zebra_nhlfe_t *nhlfe, |
659 | struct nexthop *nexthop) | |
40c7bdb0 | 660 | { |
d62a17ae | 661 | struct route_table *table; |
662 | struct prefix_ipv6 p; | |
663 | struct route_node *rn; | |
664 | struct route_entry *match; | |
40c7bdb0 | 665 | |
4a7371e9 | 666 | table = zebra_vrf_table(AFI_IP6, SAFI_UNICAST, nexthop->vrf_id); |
d62a17ae | 667 | if (!table) |
668 | return 0; | |
40c7bdb0 | 669 | |
d62a17ae | 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; | |
40c7bdb0 | 675 | |
d62a17ae | 676 | rn = route_node_match(table, (struct prefix *)&p); |
677 | if (!rn) | |
678 | return 0; | |
40c7bdb0 | 679 | |
d62a17ae | 680 | route_unlock_node(rn); |
40c7bdb0 | 681 | |
d62a17ae | 682 | /* Locate a valid connected route. */ |
a2addae8 | 683 | RNODE_FOREACH_RE (rn, match) { |
d62a17ae | 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 | } | |
40c7bdb0 | 689 | |
7ee30f28 | 690 | if (!match || !match->ng.nexthop) |
d62a17ae | 691 | return 0; |
40c7bdb0 | 692 | |
7ee30f28 | 693 | nexthop->ifindex = match->ng.nexthop->ifindex; |
d62a17ae | 694 | return 1; |
40c7bdb0 | 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 | */ | |
d62a17ae | 703 | static int nhlfe_nexthop_active(zebra_nhlfe_t *nhlfe) |
704 | { | |
705 | struct nexthop *nexthop; | |
706 | struct interface *ifp; | |
707 | ||
708 | nexthop = nhlfe->nexthop; | |
709 | if (!nexthop) // unexpected | |
710 | return 0; | |
711 | ||
712 | /* Check on nexthop based on type. */ | |
713 | switch (nexthop->type) { | |
b9abd9ad DS |
714 | case NEXTHOP_TYPE_IFINDEX: |
715 | /* | |
716 | * Lookup if this type is special. The | |
717 | * NEXTHOP_TYPE_IFINDEX is a pop and | |
718 | * forward into a different table for | |
719 | * processing. As such this ifindex | |
720 | * passed to us may be a VRF device | |
721 | * which will not be in the default | |
722 | * VRF. So let's look in all of them | |
723 | */ | |
724 | ifp = if_lookup_by_index(nexthop->ifindex, VRF_UNKNOWN); | |
725 | if (ifp && if_is_operative(ifp)) | |
726 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
727 | else | |
728 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
729 | break; | |
d62a17ae | 730 | case NEXTHOP_TYPE_IPV4: |
731 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
732 | if (nhlfe_nexthop_active_ipv4(nhlfe, nexthop)) | |
733 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
734 | else | |
735 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
736 | break; | |
737 | ||
738 | case NEXTHOP_TYPE_IPV6: | |
739 | if (nhlfe_nexthop_active_ipv6(nhlfe, nexthop)) | |
740 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
741 | else | |
742 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
743 | break; | |
744 | ||
745 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
746 | if (IN6_IS_ADDR_LINKLOCAL(&nexthop->gate.ipv6)) { | |
4a7371e9 DS |
747 | ifp = if_lookup_by_index(nexthop->ifindex, |
748 | nexthop->vrf_id); | |
d62a17ae | 749 | if (ifp && if_is_operative(ifp)) |
750 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
751 | else | |
752 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
753 | } else { | |
754 | if (nhlfe_nexthop_active_ipv6(nhlfe, nexthop)) | |
755 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
756 | else | |
757 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
758 | } | |
759 | break; | |
760 | ||
761 | default: | |
762 | break; | |
763 | } | |
764 | ||
765 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
40c7bdb0 | 766 | } |
767 | ||
768 | /* | |
769 | * Walk through NHLFEs for a LSP forwarding entry, verify nexthop | |
770 | * reachability and select the best. Multipath entries are also | |
771 | * marked. This is invoked when an LSP scheduled for processing (due | |
772 | * to some change) is examined. | |
773 | */ | |
d62a17ae | 774 | static void lsp_select_best_nhlfe(zebra_lsp_t *lsp) |
775 | { | |
776 | zebra_nhlfe_t *nhlfe; | |
777 | zebra_nhlfe_t *best; | |
778 | struct nexthop *nexthop; | |
779 | int changed = 0; | |
780 | ||
781 | if (!lsp) | |
782 | return; | |
783 | ||
784 | best = NULL; | |
785 | lsp->num_ecmp = 0; | |
786 | UNSET_FLAG(lsp->flags, LSP_FLAG_CHANGED); | |
787 | ||
788 | /* | |
789 | * First compute the best path, after checking nexthop status. We are | |
790 | * only | |
791 | * concerned with non-deleted NHLFEs. | |
792 | */ | |
793 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
794 | /* Clear selection flags. */ | |
795 | UNSET_FLAG(nhlfe->flags, | |
796 | (NHLFE_FLAG_SELECTED | NHLFE_FLAG_MULTIPATH)); | |
797 | ||
798 | if (!CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED) | |
799 | && nhlfe_nexthop_active(nhlfe)) { | |
800 | if (!best || (nhlfe->distance < best->distance)) | |
801 | best = nhlfe; | |
802 | } | |
803 | } | |
804 | ||
805 | lsp->best_nhlfe = best; | |
806 | if (!lsp->best_nhlfe) | |
807 | return; | |
808 | ||
809 | /* Mark best NHLFE as selected. */ | |
810 | SET_FLAG(lsp->best_nhlfe->flags, NHLFE_FLAG_SELECTED); | |
811 | ||
812 | /* | |
813 | * If best path exists, see if there is ECMP. While doing this, note if | |
814 | * a | |
815 | * new (uninstalled) NHLFE has been selected, an installed entry that is | |
816 | * still selected has a change or an installed entry is to be removed. | |
817 | */ | |
818 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
819 | int nh_chg, nh_sel, nh_inst; | |
820 | ||
821 | nexthop = nhlfe->nexthop; | |
822 | if (!nexthop) // unexpected | |
823 | continue; | |
824 | ||
825 | if (!CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED) | |
826 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE) | |
827 | && (nhlfe->distance == lsp->best_nhlfe->distance)) { | |
828 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED); | |
829 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_MULTIPATH); | |
830 | lsp->num_ecmp++; | |
831 | } | |
832 | ||
833 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED) && !changed) { | |
834 | nh_chg = CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
835 | nh_sel = CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED); | |
836 | nh_inst = | |
837 | CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
838 | ||
839 | if ((nh_sel && !nh_inst) | |
840 | || (nh_sel && nh_inst && nh_chg) | |
841 | || (nh_inst && !nh_sel)) | |
842 | changed = 1; | |
843 | } | |
844 | ||
845 | /* We have finished examining, clear changed flag. */ | |
846 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
847 | } | |
848 | ||
849 | if (changed) | |
850 | SET_FLAG(lsp->flags, LSP_FLAG_CHANGED); | |
40c7bdb0 | 851 | } |
852 | ||
853 | /* | |
854 | * Delete LSP forwarding entry from kernel, if installed. Called upon | |
855 | * process exit. | |
856 | */ | |
d62a17ae | 857 | static void lsp_uninstall_from_kernel(struct hash_backet *backet, void *ctxt) |
40c7bdb0 | 858 | { |
d62a17ae | 859 | zebra_lsp_t *lsp; |
40c7bdb0 | 860 | |
d62a17ae | 861 | lsp = (zebra_lsp_t *)backet->data; |
4a83e7a0 | 862 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) |
7c5d0e18 | 863 | (void)kernel_del_lsp(lsp); |
40c7bdb0 | 864 | } |
865 | ||
866 | /* | |
867 | * Schedule LSP forwarding entry for processing. Called upon changes | |
868 | * that may impact LSPs such as nexthop / connected route changes. | |
869 | */ | |
d62a17ae | 870 | static void lsp_schedule(struct hash_backet *backet, void *ctxt) |
40c7bdb0 | 871 | { |
d62a17ae | 872 | zebra_lsp_t *lsp; |
40c7bdb0 | 873 | |
d62a17ae | 874 | lsp = (zebra_lsp_t *)backet->data; |
0af35d90 | 875 | (void)lsp_processq_add(lsp); |
40c7bdb0 | 876 | } |
877 | ||
878 | /* | |
879 | * Process a LSP entry that is in the queue. Recalculate best NHLFE and | |
880 | * any multipaths and update or delete from the kernel, as needed. | |
881 | */ | |
d62a17ae | 882 | static wq_item_status lsp_process(struct work_queue *wq, void *data) |
883 | { | |
884 | zebra_lsp_t *lsp; | |
885 | zebra_nhlfe_t *oldbest, *newbest; | |
886 | char buf[BUFSIZ], buf2[BUFSIZ]; | |
887 | struct zebra_vrf *zvrf = vrf_info_lookup(VRF_DEFAULT); | |
888 | ||
889 | lsp = (zebra_lsp_t *)data; | |
890 | if (!lsp) // unexpected | |
891 | return WQ_SUCCESS; | |
892 | ||
893 | oldbest = lsp->best_nhlfe; | |
894 | ||
895 | /* Select best NHLFE(s) */ | |
896 | lsp_select_best_nhlfe(lsp); | |
897 | ||
898 | newbest = lsp->best_nhlfe; | |
899 | ||
900 | if (IS_ZEBRA_DEBUG_MPLS) { | |
901 | if (oldbest) | |
902 | nhlfe2str(oldbest, buf, BUFSIZ); | |
903 | if (newbest) | |
904 | nhlfe2str(newbest, buf2, BUFSIZ); | |
905 | zlog_debug( | |
906 | "Process LSP in-label %u oldbest %s newbest %s " | |
907 | "flags 0x%x ecmp# %d", | |
908 | lsp->ile.in_label, oldbest ? buf : "NULL", | |
909 | newbest ? buf2 : "NULL", lsp->flags, lsp->num_ecmp); | |
910 | } | |
911 | ||
912 | if (!CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) { | |
913 | /* Not already installed */ | |
914 | if (newbest) { | |
2b63430c DS |
915 | |
916 | UNSET_FLAG(lsp->flags, LSP_FLAG_CHANGED); | |
7c5d0e18 DS |
917 | switch (kernel_add_lsp(lsp)) { |
918 | case DP_REQUEST_QUEUED: | |
919 | zlog_err("No current DataPlane interfaces can return this, please fix"); | |
920 | break; | |
921 | case DP_REQUEST_FAILURE: | |
922 | break; | |
923 | case DP_REQUEST_SUCCESS: | |
924 | zvrf->lsp_installs++; | |
925 | break; | |
926 | } | |
d62a17ae | 927 | } |
928 | } else { | |
929 | /* Installed, may need an update and/or delete. */ | |
930 | if (!newbest) { | |
e6d44ec7 | 931 | |
7c5d0e18 DS |
932 | switch (kernel_del_lsp(lsp)) { |
933 | case DP_REQUEST_QUEUED: | |
934 | zlog_err("No current DataPlane interfaces can return this, please fix"); | |
935 | break; | |
936 | case DP_REQUEST_FAILURE: | |
937 | break; | |
938 | case DP_REQUEST_SUCCESS: | |
939 | zvrf->lsp_removals++; | |
940 | break; | |
941 | } | |
d62a17ae | 942 | } else if (CHECK_FLAG(lsp->flags, LSP_FLAG_CHANGED)) { |
9fa38ec6 DS |
943 | zebra_nhlfe_t *nhlfe; |
944 | struct nexthop *nexthop; | |
2b63430c DS |
945 | |
946 | UNSET_FLAG(lsp->flags, LSP_FLAG_CHANGED); | |
947 | UNSET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); | |
e6d44ec7 | 948 | |
9fa38ec6 DS |
949 | /* |
950 | * Any NHLFE that was installed but is not | |
951 | * selected now needs to have its flags updated. | |
952 | */ | |
996c9314 LB |
953 | for (nhlfe = lsp->nhlfe_list; nhlfe; |
954 | nhlfe = nhlfe->next) { | |
9fa38ec6 DS |
955 | nexthop = nhlfe->nexthop; |
956 | if (!nexthop) | |
957 | continue; | |
958 | ||
959 | if (CHECK_FLAG(nhlfe->flags, | |
996c9314 LB |
960 | NHLFE_FLAG_INSTALLED) |
961 | && !CHECK_FLAG(nhlfe->flags, | |
962 | NHLFE_FLAG_SELECTED)) { | |
9fa38ec6 DS |
963 | UNSET_FLAG(nhlfe->flags, |
964 | NHLFE_FLAG_INSTALLED); | |
965 | UNSET_FLAG(nexthop->flags, | |
966 | NEXTHOP_FLAG_FIB); | |
967 | } | |
968 | } | |
969 | ||
7c5d0e18 DS |
970 | switch (kernel_upd_lsp(lsp)) { |
971 | case DP_REQUEST_QUEUED: | |
972 | zlog_err("No current DataPlane interfaces can return this, please fix"); | |
973 | break; | |
974 | case DP_REQUEST_FAILURE: | |
975 | break; | |
976 | case DP_REQUEST_SUCCESS: | |
977 | zvrf->lsp_installs++; | |
978 | break; | |
979 | } | |
d62a17ae | 980 | } |
981 | } | |
982 | ||
983 | return WQ_SUCCESS; | |
40c7bdb0 | 984 | } |
985 | ||
986 | ||
987 | /* | |
988 | * Callback upon processing completion of a LSP forwarding entry. | |
989 | */ | |
d62a17ae | 990 | static void lsp_processq_del(struct work_queue *wq, void *data) |
40c7bdb0 | 991 | { |
d62a17ae | 992 | struct zebra_vrf *zvrf; |
993 | zebra_lsp_t *lsp; | |
994 | struct hash *lsp_table; | |
995 | zebra_nhlfe_t *nhlfe, *nhlfe_next; | |
40c7bdb0 | 996 | |
d62a17ae | 997 | zvrf = vrf_info_lookup(VRF_DEFAULT); |
998 | assert(zvrf); | |
40c7bdb0 | 999 | |
d62a17ae | 1000 | lsp_table = zvrf->lsp_table; |
1001 | if (!lsp_table) // unexpected | |
1002 | return; | |
40c7bdb0 | 1003 | |
d62a17ae | 1004 | lsp = (zebra_lsp_t *)data; |
1005 | if (!lsp) // unexpected | |
1006 | return; | |
40c7bdb0 | 1007 | |
d62a17ae | 1008 | /* Clear flag, remove any NHLFEs marked for deletion. If no NHLFEs |
1009 | * exist, | |
1010 | * delete LSP entry also. | |
1011 | */ | |
1012 | UNSET_FLAG(lsp->flags, LSP_FLAG_SCHEDULED); | |
40c7bdb0 | 1013 | |
d62a17ae | 1014 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe_next) { |
1015 | nhlfe_next = nhlfe->next; | |
1016 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED)) | |
1017 | nhlfe_del(nhlfe); | |
1018 | } | |
40c7bdb0 | 1019 | |
d62a17ae | 1020 | if (!lsp->nhlfe_list) { |
1021 | if (IS_ZEBRA_DEBUG_MPLS) | |
1022 | zlog_debug("Free LSP in-label %u flags 0x%x", | |
1023 | lsp->ile.in_label, lsp->flags); | |
40c7bdb0 | 1024 | |
d62a17ae | 1025 | lsp = hash_release(lsp_table, &lsp->ile); |
1026 | if (lsp) | |
1027 | XFREE(MTYPE_LSP, lsp); | |
1028 | } | |
40c7bdb0 | 1029 | } |
1030 | ||
1031 | /* | |
1032 | * Callback upon finishing the processing of all scheduled | |
1033 | * LSP forwarding entries. | |
1034 | */ | |
d62a17ae | 1035 | static void lsp_processq_complete(struct work_queue *wq) |
40c7bdb0 | 1036 | { |
d62a17ae | 1037 | /* Nothing to do for now. */ |
40c7bdb0 | 1038 | } |
1039 | ||
1040 | /* | |
1041 | * Add LSP forwarding entry to queue for subsequent processing. | |
1042 | */ | |
d62a17ae | 1043 | static int lsp_processq_add(zebra_lsp_t *lsp) |
40c7bdb0 | 1044 | { |
d62a17ae | 1045 | /* If already scheduled, exit. */ |
1046 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_SCHEDULED)) | |
1047 | return 0; | |
40c7bdb0 | 1048 | |
d62a17ae | 1049 | if (zebrad.lsp_process_q == NULL) { |
1050 | zlog_err("%s: work_queue does not exist!", __func__); | |
1051 | return -1; | |
1052 | } | |
33c32282 | 1053 | |
d62a17ae | 1054 | work_queue_add(zebrad.lsp_process_q, lsp); |
1055 | SET_FLAG(lsp->flags, LSP_FLAG_SCHEDULED); | |
1056 | return 0; | |
40c7bdb0 | 1057 | } |
1058 | ||
1059 | /* | |
1060 | * Callback to allocate LSP forwarding table entry. | |
1061 | */ | |
d62a17ae | 1062 | static void *lsp_alloc(void *p) |
40c7bdb0 | 1063 | { |
d62a17ae | 1064 | const zebra_ile_t *ile = p; |
1065 | zebra_lsp_t *lsp; | |
40c7bdb0 | 1066 | |
d62a17ae | 1067 | lsp = XCALLOC(MTYPE_LSP, sizeof(zebra_lsp_t)); |
1068 | lsp->ile = *ile; | |
40c7bdb0 | 1069 | |
d62a17ae | 1070 | if (IS_ZEBRA_DEBUG_MPLS) |
1071 | zlog_debug("Alloc LSP in-label %u", lsp->ile.in_label); | |
40c7bdb0 | 1072 | |
d62a17ae | 1073 | return ((void *)lsp); |
40c7bdb0 | 1074 | } |
1075 | ||
1076 | /* | |
1077 | * Create printable string for NHLFE entry. | |
1078 | */ | |
d62a17ae | 1079 | static char *nhlfe2str(zebra_nhlfe_t *nhlfe, char *buf, int size) |
40c7bdb0 | 1080 | { |
d62a17ae | 1081 | struct nexthop *nexthop; |
40c7bdb0 | 1082 | |
d62a17ae | 1083 | buf[0] = '\0'; |
1084 | nexthop = nhlfe->nexthop; | |
1085 | switch (nexthop->type) { | |
1086 | case NEXTHOP_TYPE_IPV4: | |
1087 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1088 | inet_ntop(AF_INET, &nexthop->gate.ipv4, buf, size); | |
1089 | break; | |
1090 | case NEXTHOP_TYPE_IPV6: | |
1091 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, buf, size); | |
1092 | break; | |
b9abd9ad DS |
1093 | case NEXTHOP_TYPE_IFINDEX: |
1094 | snprintf(buf, size, "Ifindex: %u", nexthop->ifindex); | |
d62a17ae | 1095 | default: |
1096 | break; | |
1097 | } | |
40c7bdb0 | 1098 | |
d62a17ae | 1099 | return buf; |
40c7bdb0 | 1100 | } |
1101 | ||
1102 | /* | |
1103 | * Check if NHLFE matches with search info passed. | |
1104 | */ | |
d62a17ae | 1105 | static int nhlfe_nhop_match(zebra_nhlfe_t *nhlfe, enum nexthop_types_t gtype, |
1106 | union g_addr *gate, ifindex_t ifindex) | |
40c7bdb0 | 1107 | { |
d62a17ae | 1108 | struct nexthop *nhop; |
1109 | int cmp = 1; | |
40c7bdb0 | 1110 | |
d62a17ae | 1111 | nhop = nhlfe->nexthop; |
1112 | if (!nhop) | |
1113 | return 1; | |
40c7bdb0 | 1114 | |
d62a17ae | 1115 | if (nhop->type != gtype) |
1116 | return 1; | |
40c7bdb0 | 1117 | |
d62a17ae | 1118 | switch (nhop->type) { |
1119 | case NEXTHOP_TYPE_IPV4: | |
1120 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1121 | cmp = memcmp(&(nhop->gate.ipv4), &(gate->ipv4), | |
1122 | sizeof(struct in_addr)); | |
1123 | if (!cmp && nhop->type == NEXTHOP_TYPE_IPV4_IFINDEX) | |
1124 | cmp = !(nhop->ifindex == ifindex); | |
1125 | break; | |
1126 | case NEXTHOP_TYPE_IPV6: | |
1127 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1128 | cmp = memcmp(&(nhop->gate.ipv6), &(gate->ipv6), | |
1129 | sizeof(struct in6_addr)); | |
1130 | if (!cmp && nhop->type == NEXTHOP_TYPE_IPV6_IFINDEX) | |
1131 | cmp = !(nhop->ifindex == ifindex); | |
1132 | break; | |
b9abd9ad DS |
1133 | case NEXTHOP_TYPE_IFINDEX: |
1134 | cmp = !(nhop->ifindex == ifindex); | |
1135 | break; | |
d62a17ae | 1136 | default: |
1137 | break; | |
1138 | } | |
40c7bdb0 | 1139 | |
d62a17ae | 1140 | return cmp; |
40c7bdb0 | 1141 | } |
1142 | ||
1143 | ||
1144 | /* | |
1145 | * Locate NHLFE that matches with passed info. | |
1146 | */ | |
d62a17ae | 1147 | static zebra_nhlfe_t *nhlfe_find(zebra_lsp_t *lsp, enum lsp_types_t lsp_type, |
1148 | enum nexthop_types_t gtype, union g_addr *gate, | |
1149 | ifindex_t ifindex) | |
40c7bdb0 | 1150 | { |
d62a17ae | 1151 | zebra_nhlfe_t *nhlfe; |
40c7bdb0 | 1152 | |
d62a17ae | 1153 | if (!lsp) |
1154 | return NULL; | |
40c7bdb0 | 1155 | |
d62a17ae | 1156 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { |
1157 | if (nhlfe->type != lsp_type) | |
1158 | continue; | |
1159 | if (!nhlfe_nhop_match(nhlfe, gtype, gate, ifindex)) | |
1160 | break; | |
1161 | } | |
40c7bdb0 | 1162 | |
d62a17ae | 1163 | return nhlfe; |
40c7bdb0 | 1164 | } |
1165 | ||
1166 | /* | |
1167 | * Add NHLFE. Base entry must have been created and duplicate | |
1168 | * check done. | |
1169 | */ | |
d62a17ae | 1170 | static zebra_nhlfe_t *nhlfe_add(zebra_lsp_t *lsp, enum lsp_types_t lsp_type, |
1171 | enum nexthop_types_t gtype, union g_addr *gate, | |
1172 | ifindex_t ifindex, mpls_label_t out_label) | |
1173 | { | |
1174 | zebra_nhlfe_t *nhlfe; | |
1175 | struct nexthop *nexthop; | |
1176 | ||
1177 | if (!lsp) | |
1178 | return NULL; | |
1179 | ||
1180 | nhlfe = XCALLOC(MTYPE_NHLFE, sizeof(zebra_nhlfe_t)); | |
1181 | if (!nhlfe) | |
1182 | return NULL; | |
1183 | ||
1184 | nhlfe->lsp = lsp; | |
1185 | nhlfe->type = lsp_type; | |
1186 | nhlfe->distance = lsp_distance(lsp_type); | |
1187 | ||
1188 | nexthop = nexthop_new(); | |
1189 | if (!nexthop) { | |
1190 | XFREE(MTYPE_NHLFE, nhlfe); | |
1191 | return NULL; | |
1192 | } | |
1193 | nexthop_add_labels(nexthop, lsp_type, 1, &out_label); | |
1194 | ||
4a7371e9 | 1195 | nexthop->vrf_id = VRF_DEFAULT; |
d62a17ae | 1196 | nexthop->type = gtype; |
1197 | switch (nexthop->type) { | |
1198 | case NEXTHOP_TYPE_IPV4: | |
1199 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1200 | nexthop->gate.ipv4 = gate->ipv4; | |
1201 | if (ifindex) | |
1202 | nexthop->ifindex = ifindex; | |
1203 | break; | |
1204 | case NEXTHOP_TYPE_IPV6: | |
1205 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1206 | nexthop->gate.ipv6 = gate->ipv6; | |
1207 | if (ifindex) | |
1208 | nexthop->ifindex = ifindex; | |
1209 | break; | |
b9abd9ad DS |
1210 | case NEXTHOP_TYPE_IFINDEX: |
1211 | nexthop->ifindex = ifindex; | |
1212 | break; | |
d62a17ae | 1213 | default: |
1214 | nexthop_free(nexthop); | |
1215 | XFREE(MTYPE_NHLFE, nhlfe); | |
1216 | return NULL; | |
1217 | break; | |
1218 | } | |
1219 | ||
1220 | nhlfe->nexthop = nexthop; | |
1221 | if (lsp->nhlfe_list) | |
1222 | lsp->nhlfe_list->prev = nhlfe; | |
1223 | nhlfe->next = lsp->nhlfe_list; | |
1224 | lsp->nhlfe_list = nhlfe; | |
1225 | ||
1226 | return nhlfe; | |
40c7bdb0 | 1227 | } |
1228 | ||
1229 | /* | |
1230 | * Delete NHLFE. Entry must be present on list. | |
1231 | */ | |
d62a17ae | 1232 | static int nhlfe_del(zebra_nhlfe_t *nhlfe) |
40c7bdb0 | 1233 | { |
d62a17ae | 1234 | zebra_lsp_t *lsp; |
40c7bdb0 | 1235 | |
d62a17ae | 1236 | if (!nhlfe) |
1237 | return -1; | |
40c7bdb0 | 1238 | |
d62a17ae | 1239 | lsp = nhlfe->lsp; |
1240 | if (!lsp) | |
1241 | return -1; | |
40c7bdb0 | 1242 | |
d62a17ae | 1243 | /* Free nexthop. */ |
1244 | if (nhlfe->nexthop) | |
1245 | nexthop_free(nhlfe->nexthop); | |
40c7bdb0 | 1246 | |
d62a17ae | 1247 | /* Unlink from LSP */ |
1248 | if (nhlfe->next) | |
1249 | nhlfe->next->prev = nhlfe->prev; | |
1250 | if (nhlfe->prev) | |
1251 | nhlfe->prev->next = nhlfe->next; | |
1252 | else | |
1253 | lsp->nhlfe_list = nhlfe->next; | |
40c7bdb0 | 1254 | |
d62a17ae | 1255 | if (nhlfe == lsp->best_nhlfe) |
1256 | lsp->best_nhlfe = NULL; | |
bb49a121 | 1257 | |
d62a17ae | 1258 | XFREE(MTYPE_NHLFE, nhlfe); |
40c7bdb0 | 1259 | |
d62a17ae | 1260 | return 0; |
40c7bdb0 | 1261 | } |
1262 | ||
a64448ba DS |
1263 | /* |
1264 | * Update label for NHLFE entry. | |
1265 | */ | |
d62a17ae | 1266 | static void nhlfe_out_label_update(zebra_nhlfe_t *nhlfe, |
8ecdb26e | 1267 | struct mpls_label_stack *nh_label) |
d62a17ae | 1268 | { |
1269 | nhlfe->nexthop->nh_label->label[0] = nh_label->label[0]; | |
1270 | } | |
1271 | ||
1272 | static int mpls_lsp_uninstall_all(struct hash *lsp_table, zebra_lsp_t *lsp, | |
1273 | enum lsp_types_t type) | |
1274 | { | |
1275 | zebra_nhlfe_t *nhlfe, *nhlfe_next; | |
1276 | int schedule_lsp = 0; | |
1277 | char buf[BUFSIZ]; | |
1278 | ||
1279 | /* Mark NHLFEs for delete or directly delete, as appropriate. */ | |
1280 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe_next) { | |
1281 | nhlfe_next = nhlfe->next; | |
1282 | ||
1283 | /* Skip non-static NHLFEs */ | |
1284 | if (nhlfe->type != type) | |
1285 | continue; | |
1286 | ||
1287 | if (IS_ZEBRA_DEBUG_MPLS) { | |
1288 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
1289 | zlog_debug( | |
1290 | "Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
1291 | lsp->ile.in_label, type, buf, nhlfe->flags); | |
1292 | } | |
1293 | ||
1294 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) { | |
1295 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
1296 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
1297 | schedule_lsp = 1; | |
1298 | } else { | |
1299 | nhlfe_del(nhlfe); | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | /* Queue LSP for processing, if needed, else delete. */ | |
1304 | if (schedule_lsp) { | |
1305 | if (lsp_processq_add(lsp)) | |
1306 | return -1; | |
1307 | } else if (!lsp->nhlfe_list | |
1308 | && !CHECK_FLAG(lsp->flags, LSP_FLAG_SCHEDULED)) { | |
1309 | if (IS_ZEBRA_DEBUG_MPLS) | |
1310 | zlog_debug("Free LSP in-label %u flags 0x%x", | |
1311 | lsp->ile.in_label, lsp->flags); | |
1312 | ||
1313 | lsp = hash_release(lsp_table, &lsp->ile); | |
1314 | if (lsp) | |
1315 | XFREE(MTYPE_LSP, lsp); | |
1316 | } | |
1317 | ||
1318 | return 0; | |
40c7bdb0 | 1319 | } |
1320 | ||
ce549947 RW |
1321 | /* |
1322 | * Uninstall all static NHLFEs for a particular LSP forwarding entry. | |
1323 | * If no other NHLFEs exist, the entry would be deleted. | |
1324 | */ | |
d62a17ae | 1325 | static int mpls_static_lsp_uninstall_all(struct zebra_vrf *zvrf, |
1326 | mpls_label_t in_label) | |
ce549947 | 1327 | { |
d62a17ae | 1328 | struct hash *lsp_table; |
1329 | zebra_ile_t tmp_ile; | |
1330 | zebra_lsp_t *lsp; | |
ce549947 | 1331 | |
d62a17ae | 1332 | /* Lookup table. */ |
1333 | lsp_table = zvrf->lsp_table; | |
1334 | if (!lsp_table) | |
1335 | return -1; | |
ce549947 | 1336 | |
d62a17ae | 1337 | /* If entry is not present, exit. */ |
1338 | tmp_ile.in_label = in_label; | |
1339 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
1340 | if (!lsp || !lsp->nhlfe_list) | |
1341 | return 0; | |
ce549947 | 1342 | |
d62a17ae | 1343 | return mpls_lsp_uninstall_all(lsp_table, lsp, ZEBRA_LSP_STATIC); |
ce549947 RW |
1344 | } |
1345 | ||
d62a17ae | 1346 | static json_object *nhlfe_json(zebra_nhlfe_t *nhlfe) |
b78b820d | 1347 | { |
d62a17ae | 1348 | char buf[BUFSIZ]; |
1349 | json_object *json_nhlfe = NULL; | |
1350 | struct nexthop *nexthop = nhlfe->nexthop; | |
b78b820d | 1351 | |
d62a17ae | 1352 | json_nhlfe = json_object_new_object(); |
1353 | json_object_string_add(json_nhlfe, "type", nhlfe_type2str(nhlfe->type)); | |
1354 | json_object_int_add(json_nhlfe, "outLabel", | |
1355 | nexthop->nh_label->label[0]); | |
1356 | json_object_int_add(json_nhlfe, "distance", nhlfe->distance); | |
b78b820d | 1357 | |
d62a17ae | 1358 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) |
1359 | json_object_boolean_true_add(json_nhlfe, "installed"); | |
b78b820d | 1360 | |
d62a17ae | 1361 | switch (nexthop->type) { |
1362 | case NEXTHOP_TYPE_IPV4: | |
1363 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1364 | json_object_string_add(json_nhlfe, "nexthop", | |
1365 | inet_ntoa(nexthop->gate.ipv4)); | |
1366 | break; | |
1367 | case NEXTHOP_TYPE_IPV6: | |
1368 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1369 | json_object_string_add( | |
1370 | json_nhlfe, "nexthop", | |
1371 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); | |
1372 | ||
1373 | if (nexthop->ifindex) | |
4a7371e9 DS |
1374 | json_object_string_add(json_nhlfe, "interface", |
1375 | ifindex2ifname(nexthop->ifindex, | |
1376 | nexthop->vrf_id)); | |
d62a17ae | 1377 | break; |
1378 | default: | |
1379 | break; | |
1380 | } | |
1381 | return json_nhlfe; | |
b78b820d | 1382 | } |
1383 | ||
3ab18ff2 | 1384 | /* |
1385 | * Print the NHLFE for a LSP forwarding entry. | |
1386 | */ | |
d62a17ae | 1387 | static void nhlfe_print(zebra_nhlfe_t *nhlfe, struct vty *vty) |
1388 | { | |
1389 | struct nexthop *nexthop; | |
1390 | char buf[BUFSIZ]; | |
1391 | ||
1392 | nexthop = nhlfe->nexthop; | |
1393 | if (!nexthop || !nexthop->nh_label) // unexpected | |
1394 | return; | |
1395 | ||
1396 | vty_out(vty, " type: %s remote label: %s distance: %d\n", | |
1397 | nhlfe_type2str(nhlfe->type), | |
1398 | label2str(nexthop->nh_label->label[0], buf, BUFSIZ), | |
1399 | nhlfe->distance); | |
1400 | switch (nexthop->type) { | |
1401 | case NEXTHOP_TYPE_IPV4: | |
1402 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1403 | vty_out(vty, " via %s", inet_ntoa(nexthop->gate.ipv4)); | |
1404 | if (nexthop->ifindex) | |
1405 | vty_out(vty, " dev %s", | |
4a7371e9 DS |
1406 | ifindex2ifname(nexthop->ifindex, |
1407 | nexthop->vrf_id)); | |
d62a17ae | 1408 | break; |
1409 | case NEXTHOP_TYPE_IPV6: | |
1410 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1411 | vty_out(vty, " via %s", | |
1412 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); | |
1413 | if (nexthop->ifindex) | |
1414 | vty_out(vty, " dev %s", | |
4a7371e9 DS |
1415 | ifindex2ifname(nexthop->ifindex, |
1416 | nexthop->vrf_id)); | |
d62a17ae | 1417 | break; |
1418 | default: | |
1419 | break; | |
1420 | } | |
996c9314 LB |
1421 | vty_out(vty, "%s", |
1422 | CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) ? " (installed)" | |
1423 | : ""); | |
d62a17ae | 1424 | vty_out(vty, "\n"); |
3ab18ff2 | 1425 | } |
1426 | ||
1427 | /* | |
1428 | * Print an LSP forwarding entry. | |
1429 | */ | |
d62a17ae | 1430 | static void lsp_print(zebra_lsp_t *lsp, void *ctxt) |
3ab18ff2 | 1431 | { |
d62a17ae | 1432 | zebra_nhlfe_t *nhlfe; |
1433 | struct vty *vty; | |
3ab18ff2 | 1434 | |
d62a17ae | 1435 | vty = (struct vty *)ctxt; |
3ab18ff2 | 1436 | |
d62a17ae | 1437 | vty_out(vty, "Local label: %u%s\n", lsp->ile.in_label, |
1438 | CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED) ? " (installed)" | |
1439 | : ""); | |
3ab18ff2 | 1440 | |
d62a17ae | 1441 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) |
1442 | nhlfe_print(nhlfe, vty); | |
3ab18ff2 | 1443 | } |
1444 | ||
1445 | /* | |
b78b820d | 1446 | * JSON objects for an LSP forwarding entry. |
3ab18ff2 | 1447 | */ |
d62a17ae | 1448 | static json_object *lsp_json(zebra_lsp_t *lsp) |
3ab18ff2 | 1449 | { |
d62a17ae | 1450 | zebra_nhlfe_t *nhlfe = NULL; |
1451 | json_object *json = json_object_new_object(); | |
1452 | json_object *json_nhlfe_list = json_object_new_array(); | |
3ab18ff2 | 1453 | |
d62a17ae | 1454 | json_object_int_add(json, "inLabel", lsp->ile.in_label); |
b78b820d | 1455 | |
d62a17ae | 1456 | if (CHECK_FLAG(lsp->flags, LSP_FLAG_INSTALLED)) |
1457 | json_object_boolean_true_add(json, "installed"); | |
3ab18ff2 | 1458 | |
d62a17ae | 1459 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) |
1460 | json_object_array_add(json_nhlfe_list, nhlfe_json(nhlfe)); | |
b78b820d | 1461 | |
d62a17ae | 1462 | json_object_object_add(json, "nexthops", json_nhlfe_list); |
1463 | return json; | |
b78b820d | 1464 | } |
1465 | ||
1466 | ||
1467 | /* Return a sorted linked list of the hash contents */ | |
d62a17ae | 1468 | static struct list *hash_get_sorted_list(struct hash *hash, void *cmp) |
b78b820d | 1469 | { |
d62a17ae | 1470 | unsigned int i; |
1471 | struct hash_backet *hb; | |
1472 | struct list *sorted_list = list_new(); | |
b78b820d | 1473 | |
d62a17ae | 1474 | sorted_list->cmp = (int (*)(void *, void *))cmp; |
b78b820d | 1475 | |
d62a17ae | 1476 | for (i = 0; i < hash->size; i++) |
1477 | for (hb = hash->index[i]; hb; hb = hb->next) | |
1478 | listnode_add_sort(sorted_list, hb->data); | |
b78b820d | 1479 | |
d62a17ae | 1480 | return sorted_list; |
3ab18ff2 | 1481 | } |
1482 | ||
7758e3f3 | 1483 | /* |
b78b820d | 1484 | * Compare two LSPs based on their label values. |
7758e3f3 | 1485 | */ |
d62a17ae | 1486 | static int lsp_cmp(zebra_lsp_t *lsp1, zebra_lsp_t *lsp2) |
7758e3f3 | 1487 | { |
d62a17ae | 1488 | if (lsp1->ile.in_label < lsp2->ile.in_label) |
1489 | return -1; | |
7758e3f3 | 1490 | |
d62a17ae | 1491 | if (lsp1->ile.in_label > lsp2->ile.in_label) |
1492 | return 1; | |
7758e3f3 | 1493 | |
d62a17ae | 1494 | return 0; |
7758e3f3 | 1495 | } |
1496 | ||
1497 | /* | |
1498 | * Callback to allocate static LSP. | |
1499 | */ | |
d62a17ae | 1500 | static void *slsp_alloc(void *p) |
7758e3f3 | 1501 | { |
d62a17ae | 1502 | const zebra_ile_t *ile = p; |
1503 | zebra_slsp_t *slsp; | |
7758e3f3 | 1504 | |
d62a17ae | 1505 | slsp = XCALLOC(MTYPE_SLSP, sizeof(zebra_slsp_t)); |
1506 | slsp->ile = *ile; | |
1507 | return ((void *)slsp); | |
7758e3f3 | 1508 | } |
1509 | ||
b78b820d | 1510 | /* |
1511 | * Compare two static LSPs based on their label values. | |
1512 | */ | |
d62a17ae | 1513 | static int slsp_cmp(zebra_slsp_t *slsp1, zebra_slsp_t *slsp2) |
b78b820d | 1514 | { |
d62a17ae | 1515 | if (slsp1->ile.in_label < slsp2->ile.in_label) |
1516 | return -1; | |
b78b820d | 1517 | |
d62a17ae | 1518 | if (slsp1->ile.in_label > slsp2->ile.in_label) |
1519 | return 1; | |
b78b820d | 1520 | |
d62a17ae | 1521 | return 0; |
b78b820d | 1522 | } |
1523 | ||
7758e3f3 | 1524 | /* |
1525 | * Check if static NHLFE matches with search info passed. | |
1526 | */ | |
d62a17ae | 1527 | static int snhlfe_match(zebra_snhlfe_t *snhlfe, enum nexthop_types_t gtype, |
1528 | union g_addr *gate, ifindex_t ifindex) | |
7758e3f3 | 1529 | { |
d62a17ae | 1530 | int cmp = 1; |
7758e3f3 | 1531 | |
d62a17ae | 1532 | if (snhlfe->gtype != gtype) |
1533 | return 1; | |
7758e3f3 | 1534 | |
d62a17ae | 1535 | switch (snhlfe->gtype) { |
1536 | case NEXTHOP_TYPE_IPV4: | |
1537 | cmp = memcmp(&(snhlfe->gate.ipv4), &(gate->ipv4), | |
1538 | sizeof(struct in_addr)); | |
1539 | break; | |
1540 | case NEXTHOP_TYPE_IPV6: | |
1541 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1542 | cmp = memcmp(&(snhlfe->gate.ipv6), &(gate->ipv6), | |
1543 | sizeof(struct in6_addr)); | |
1544 | if (!cmp && snhlfe->gtype == NEXTHOP_TYPE_IPV6_IFINDEX) | |
1545 | cmp = !(snhlfe->ifindex == ifindex); | |
1546 | break; | |
1547 | default: | |
1548 | break; | |
1549 | } | |
7758e3f3 | 1550 | |
d62a17ae | 1551 | return cmp; |
7758e3f3 | 1552 | } |
1553 | ||
1554 | /* | |
1555 | * Locate static NHLFE that matches with passed info. | |
1556 | */ | |
d62a17ae | 1557 | static zebra_snhlfe_t *snhlfe_find(zebra_slsp_t *slsp, |
1558 | enum nexthop_types_t gtype, | |
1559 | union g_addr *gate, ifindex_t ifindex) | |
7758e3f3 | 1560 | { |
d62a17ae | 1561 | zebra_snhlfe_t *snhlfe; |
7758e3f3 | 1562 | |
d62a17ae | 1563 | if (!slsp) |
1564 | return NULL; | |
7758e3f3 | 1565 | |
d62a17ae | 1566 | for (snhlfe = slsp->snhlfe_list; snhlfe; snhlfe = snhlfe->next) { |
1567 | if (!snhlfe_match(snhlfe, gtype, gate, ifindex)) | |
1568 | break; | |
1569 | } | |
7758e3f3 | 1570 | |
d62a17ae | 1571 | return snhlfe; |
7758e3f3 | 1572 | } |
1573 | ||
1574 | ||
1575 | /* | |
1576 | * Add static NHLFE. Base LSP config entry must have been created | |
1577 | * and duplicate check done. | |
1578 | */ | |
d62a17ae | 1579 | static zebra_snhlfe_t *snhlfe_add(zebra_slsp_t *slsp, |
1580 | enum nexthop_types_t gtype, | |
1581 | union g_addr *gate, ifindex_t ifindex, | |
1582 | mpls_label_t out_label) | |
1583 | { | |
1584 | zebra_snhlfe_t *snhlfe; | |
1585 | ||
1586 | if (!slsp) | |
1587 | return NULL; | |
1588 | ||
1589 | snhlfe = XCALLOC(MTYPE_SNHLFE, sizeof(zebra_snhlfe_t)); | |
1590 | snhlfe->slsp = slsp; | |
1591 | snhlfe->out_label = out_label; | |
1592 | snhlfe->gtype = gtype; | |
1593 | switch (gtype) { | |
1594 | case NEXTHOP_TYPE_IPV4: | |
1595 | snhlfe->gate.ipv4 = gate->ipv4; | |
1596 | break; | |
1597 | case NEXTHOP_TYPE_IPV6: | |
1598 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1599 | snhlfe->gate.ipv6 = gate->ipv6; | |
1600 | if (ifindex) | |
1601 | snhlfe->ifindex = ifindex; | |
1602 | break; | |
1603 | default: | |
1604 | XFREE(MTYPE_SNHLFE, snhlfe); | |
1605 | return NULL; | |
1606 | } | |
1607 | ||
1608 | if (slsp->snhlfe_list) | |
1609 | slsp->snhlfe_list->prev = snhlfe; | |
1610 | snhlfe->next = slsp->snhlfe_list; | |
1611 | slsp->snhlfe_list = snhlfe; | |
1612 | ||
1613 | return snhlfe; | |
7758e3f3 | 1614 | } |
1615 | ||
1616 | /* | |
1617 | * Delete static NHLFE. Entry must be present on list. | |
1618 | */ | |
d62a17ae | 1619 | static int snhlfe_del(zebra_snhlfe_t *snhlfe) |
7758e3f3 | 1620 | { |
d62a17ae | 1621 | zebra_slsp_t *slsp; |
7758e3f3 | 1622 | |
d62a17ae | 1623 | if (!snhlfe) |
1624 | return -1; | |
7758e3f3 | 1625 | |
d62a17ae | 1626 | slsp = snhlfe->slsp; |
1627 | if (!slsp) | |
1628 | return -1; | |
7758e3f3 | 1629 | |
d62a17ae | 1630 | if (snhlfe->next) |
1631 | snhlfe->next->prev = snhlfe->prev; | |
1632 | if (snhlfe->prev) | |
1633 | snhlfe->prev->next = snhlfe->next; | |
1634 | else | |
1635 | slsp->snhlfe_list = snhlfe->next; | |
7758e3f3 | 1636 | |
d62a17ae | 1637 | snhlfe->prev = snhlfe->next = NULL; |
1638 | if (snhlfe->ifname) | |
1639 | XFREE(MTYPE_SNHLFE_IFNAME, snhlfe->ifname); | |
1640 | XFREE(MTYPE_SNHLFE, snhlfe); | |
7758e3f3 | 1641 | |
d62a17ae | 1642 | return 0; |
7758e3f3 | 1643 | } |
1644 | ||
1645 | /* | |
1646 | * Delete all static NHLFE entries for this LSP (in label). | |
1647 | */ | |
d62a17ae | 1648 | static int snhlfe_del_all(zebra_slsp_t *slsp) |
7758e3f3 | 1649 | { |
d62a17ae | 1650 | zebra_snhlfe_t *snhlfe, *snhlfe_next; |
7758e3f3 | 1651 | |
d62a17ae | 1652 | if (!slsp) |
1653 | return -1; | |
7758e3f3 | 1654 | |
d62a17ae | 1655 | for (snhlfe = slsp->snhlfe_list; snhlfe; snhlfe = snhlfe_next) { |
1656 | snhlfe_next = snhlfe->next; | |
1657 | snhlfe_del(snhlfe); | |
1658 | } | |
7758e3f3 | 1659 | |
d62a17ae | 1660 | return 0; |
7758e3f3 | 1661 | } |
1662 | ||
1663 | /* | |
1664 | * Create printable string for NHLFE configuration. | |
1665 | */ | |
d62a17ae | 1666 | static char *snhlfe2str(zebra_snhlfe_t *snhlfe, char *buf, int size) |
7758e3f3 | 1667 | { |
d62a17ae | 1668 | buf[0] = '\0'; |
1669 | switch (snhlfe->gtype) { | |
1670 | case NEXTHOP_TYPE_IPV4: | |
1671 | inet_ntop(AF_INET, &snhlfe->gate.ipv4, buf, size); | |
1672 | break; | |
1673 | case NEXTHOP_TYPE_IPV6: | |
1674 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1675 | inet_ntop(AF_INET6, &snhlfe->gate.ipv6, buf, size); | |
1676 | if (snhlfe->ifindex) | |
1677 | strcat(buf, | |
1678 | ifindex2ifname(snhlfe->ifindex, VRF_DEFAULT)); | |
1679 | break; | |
1680 | default: | |
1681 | break; | |
1682 | } | |
7758e3f3 | 1683 | |
d62a17ae | 1684 | return buf; |
7758e3f3 | 1685 | } |
1686 | ||
40c7bdb0 | 1687 | /* |
1688 | * Initialize work queue for processing changed LSPs. | |
1689 | */ | |
d62a17ae | 1690 | static int mpls_processq_init(struct zebra_t *zebra) |
40c7bdb0 | 1691 | { |
d62a17ae | 1692 | zebra->lsp_process_q = work_queue_new(zebra->master, "LSP processing"); |
1693 | if (!zebra->lsp_process_q) { | |
1694 | zlog_err("%s: could not initialise work queue!", __func__); | |
1695 | return -1; | |
1696 | } | |
40c7bdb0 | 1697 | |
d62a17ae | 1698 | zebra->lsp_process_q->spec.workfunc = &lsp_process; |
1699 | zebra->lsp_process_q->spec.del_item_data = &lsp_processq_del; | |
1700 | zebra->lsp_process_q->spec.errorfunc = NULL; | |
1701 | zebra->lsp_process_q->spec.completion_func = &lsp_processq_complete; | |
1702 | zebra->lsp_process_q->spec.max_retries = 0; | |
1703 | zebra->lsp_process_q->spec.hold = 10; | |
33c32282 | 1704 | |
d62a17ae | 1705 | return 0; |
40c7bdb0 | 1706 | } |
1707 | ||
7758e3f3 | 1708 | |
7758e3f3 | 1709 | /* Public functions */ |
1710 | ||
215181cb | 1711 | void kernel_lsp_pass_fail(zebra_lsp_t *lsp, enum dp_results res) |
4a83e7a0 DS |
1712 | { |
1713 | struct nexthop *nexthop; | |
1714 | zebra_nhlfe_t *nhlfe; | |
1715 | ||
1716 | if (!lsp) | |
1717 | return; | |
1718 | ||
1719 | switch (res) { | |
215181cb | 1720 | case DP_INSTALL_FAILURE: |
4a83e7a0 DS |
1721 | UNSET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); |
1722 | clear_nhlfe_installed(lsp); | |
1723 | zlog_warn("LSP Install Failure: %u", lsp->ile.in_label); | |
1724 | break; | |
215181cb | 1725 | case DP_INSTALL_SUCCESS: |
4a83e7a0 DS |
1726 | SET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); |
1727 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
1728 | nexthop = nhlfe->nexthop; | |
1729 | if (!nexthop) | |
1730 | continue; | |
1731 | ||
1732 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
1733 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1734 | } | |
1735 | break; | |
215181cb | 1736 | case DP_DELETE_SUCCESS: |
4a83e7a0 DS |
1737 | UNSET_FLAG(lsp->flags, LSP_FLAG_INSTALLED); |
1738 | clear_nhlfe_installed(lsp); | |
1739 | break; | |
215181cb | 1740 | case DP_DELETE_FAILURE: |
4a83e7a0 DS |
1741 | zlog_warn("LSP Deletion Failure: %u", lsp->ile.in_label); |
1742 | break; | |
1743 | } | |
1744 | } | |
1745 | ||
a64448ba DS |
1746 | /* |
1747 | * Install dynamic LSP entry. | |
1748 | */ | |
d62a17ae | 1749 | int zebra_mpls_lsp_install(struct zebra_vrf *zvrf, struct route_node *rn, |
1750 | struct route_entry *re) | |
a64448ba | 1751 | { |
d62a17ae | 1752 | struct route_table *table; |
1753 | zebra_fec_t *fec; | |
a64448ba | 1754 | |
d62a17ae | 1755 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(&rn->p))]; |
1756 | if (!table) | |
1757 | return -1; | |
a64448ba | 1758 | |
d62a17ae | 1759 | /* See if there is a configured label binding for this FEC. */ |
1760 | fec = fec_find(table, &rn->p); | |
1761 | if (!fec || fec->label == MPLS_INVALID_LABEL) | |
1762 | return 0; | |
a64448ba | 1763 | |
d62a17ae | 1764 | /* We cannot install a label forwarding entry if local label is the |
1765 | * implicit-null label. | |
1766 | */ | |
70e98a7f | 1767 | if (fec->label == MPLS_LABEL_IMPLICIT_NULL) |
d62a17ae | 1768 | return 0; |
a64448ba | 1769 | |
d62a17ae | 1770 | if (lsp_install(zvrf, fec->label, rn, re)) |
1771 | return -1; | |
a64448ba | 1772 | |
d62a17ae | 1773 | return 0; |
a64448ba DS |
1774 | } |
1775 | ||
1776 | /* | |
1777 | * Uninstall dynamic LSP entry, if any. | |
1778 | */ | |
d62a17ae | 1779 | int zebra_mpls_lsp_uninstall(struct zebra_vrf *zvrf, struct route_node *rn, |
1780 | struct route_entry *re) | |
a64448ba | 1781 | { |
d62a17ae | 1782 | struct route_table *table; |
1783 | zebra_fec_t *fec; | |
a64448ba | 1784 | |
d62a17ae | 1785 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(&rn->p))]; |
1786 | if (!table) | |
1787 | return -1; | |
a64448ba | 1788 | |
d62a17ae | 1789 | /* See if there is a configured label binding for this FEC. */ |
1790 | fec = fec_find(table, &rn->p); | |
1791 | if (!fec || fec->label == MPLS_INVALID_LABEL) | |
1792 | return 0; | |
a64448ba | 1793 | |
d62a17ae | 1794 | /* Uninstall always removes all dynamic NHLFEs. */ |
1795 | return lsp_uninstall(zvrf, fec->label); | |
a64448ba DS |
1796 | } |
1797 | ||
5aba114a DS |
1798 | /* |
1799 | * Registration from a client for the label binding for a FEC. If a binding | |
1800 | * already exists, it is informed to the client. | |
28d58fd7 | 1801 | * NOTE: If there is a manually configured label binding, that is used. |
9bedbb1e | 1802 | * Otherwise, if a label index is specified, it means we have to allocate the |
28d58fd7 VV |
1803 | * label from a locally configured label block (SRGB), if one exists and index |
1804 | * is acceptable. | |
5aba114a | 1805 | */ |
d62a17ae | 1806 | int zebra_mpls_fec_register(struct zebra_vrf *zvrf, struct prefix *p, |
d7c0a89a | 1807 | uint32_t label_index, struct zserv *client) |
d62a17ae | 1808 | { |
1809 | struct route_table *table; | |
1810 | zebra_fec_t *fec; | |
1811 | char buf[BUFSIZ]; | |
1812 | int new_client; | |
1813 | int label_change = 0; | |
d7c0a89a | 1814 | uint32_t old_label; |
d62a17ae | 1815 | |
1816 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
1817 | if (!table) | |
1818 | return -1; | |
1819 | ||
1820 | if (IS_ZEBRA_DEBUG_MPLS) | |
1821 | prefix2str(p, buf, BUFSIZ); | |
1822 | ||
1823 | /* Locate FEC */ | |
1824 | fec = fec_find(table, p); | |
1825 | if (!fec) { | |
1826 | fec = fec_add(table, p, MPLS_INVALID_LABEL, 0, label_index); | |
1827 | if (!fec) { | |
1828 | prefix2str(p, buf, BUFSIZ); | |
1829 | zlog_err( | |
1830 | "Failed to add FEC %s upon register, client %s", | |
1831 | buf, zebra_route_string(client->proto)); | |
1832 | return -1; | |
1833 | } | |
1834 | ||
1835 | old_label = MPLS_INVALID_LABEL; | |
1836 | new_client = 1; | |
1837 | } else { | |
1838 | /* Client may register same FEC with different label index. */ | |
1839 | new_client = | |
1840 | (listnode_lookup(fec->client_list, client) == NULL); | |
1841 | if (!new_client && fec->label_index == label_index) | |
1842 | /* Duplicate register */ | |
1843 | return 0; | |
1844 | ||
1845 | /* Save current label, update label index */ | |
1846 | old_label = fec->label; | |
1847 | fec->label_index = label_index; | |
1848 | } | |
1849 | ||
1850 | if (new_client) | |
1851 | listnode_add(fec->client_list, client); | |
1852 | ||
1853 | if (IS_ZEBRA_DEBUG_MPLS) | |
1854 | zlog_debug("FEC %s Label Index %u %s by client %s", buf, | |
1855 | label_index, new_client ? "registered" : "updated", | |
1856 | zebra_route_string(client->proto)); | |
1857 | ||
1858 | /* If not a configured FEC, derive the local label (from label index) | |
1859 | * or reset it. | |
1860 | */ | |
1861 | if (!(fec->flags & FEC_FLAG_CONFIGURED)) { | |
1862 | fec_derive_label_from_index(zvrf, fec); | |
1863 | ||
1864 | /* If no label change, exit. */ | |
1865 | if (fec->label == old_label) | |
1866 | return 0; | |
1867 | ||
1868 | label_change = 1; | |
1869 | } | |
1870 | ||
1871 | /* If new client or label change, update client and install or uninstall | |
1872 | * label forwarding entry as needed. | |
1873 | */ | |
1874 | /* Inform client of label, if needed. */ | |
1875 | if ((new_client && fec->label != MPLS_INVALID_LABEL) || label_change) { | |
1876 | if (IS_ZEBRA_DEBUG_MPLS) | |
1877 | zlog_debug("Update client label %u", fec->label); | |
1878 | fec_send(fec, client); | |
1879 | } | |
1880 | ||
1881 | if (new_client || label_change) | |
1882 | return fec_change_update_lsp(zvrf, fec, old_label); | |
1883 | ||
1884 | return 0; | |
5aba114a DS |
1885 | } |
1886 | ||
1887 | /* | |
1888 | * Deregistration from a client for the label binding for a FEC. The FEC | |
1889 | * itself is deleted if no other registered clients exist and there is no | |
1890 | * label bound to the FEC. | |
1891 | */ | |
d62a17ae | 1892 | int zebra_mpls_fec_unregister(struct zebra_vrf *zvrf, struct prefix *p, |
1893 | struct zserv *client) | |
5aba114a | 1894 | { |
d62a17ae | 1895 | struct route_table *table; |
1896 | zebra_fec_t *fec; | |
1897 | char buf[BUFSIZ]; | |
5aba114a | 1898 | |
d62a17ae | 1899 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; |
1900 | if (!table) | |
1901 | return -1; | |
5aba114a | 1902 | |
d62a17ae | 1903 | if (IS_ZEBRA_DEBUG_MPLS) |
1904 | prefix2str(p, buf, BUFSIZ); | |
5aba114a | 1905 | |
d62a17ae | 1906 | fec = fec_find(table, p); |
1907 | if (!fec) { | |
1908 | prefix2str(p, buf, BUFSIZ); | |
1909 | zlog_err("Failed to find FEC %s upon unregister, client %s", | |
1910 | buf, zebra_route_string(client->proto)); | |
1911 | return -1; | |
1912 | } | |
5aba114a | 1913 | |
d62a17ae | 1914 | listnode_delete(fec->client_list, client); |
1915 | ||
1916 | if (IS_ZEBRA_DEBUG_MPLS) | |
1917 | zlog_debug("FEC %s unregistered by client %s", buf, | |
1918 | zebra_route_string(client->proto)); | |
1919 | ||
1920 | /* If not a configured entry, delete the FEC if no other clients. Before | |
1921 | * deleting, see if any LSP needs to be uninstalled. | |
1922 | */ | |
1923 | if (!(fec->flags & FEC_FLAG_CONFIGURED) | |
1924 | && list_isempty(fec->client_list)) { | |
1925 | mpls_label_t old_label = fec->label; | |
1926 | fec->label = MPLS_INVALID_LABEL; /* reset */ | |
1927 | fec_change_update_lsp(zvrf, fec, old_label); | |
1928 | fec_del(fec); | |
1929 | } | |
5aba114a | 1930 | |
d62a17ae | 1931 | return 0; |
5aba114a DS |
1932 | } |
1933 | ||
1934 | /* | |
1935 | * Cleanup any FECs registered by this client. | |
1936 | */ | |
453844ab | 1937 | static int zebra_mpls_cleanup_fecs_for_client(struct zserv *client) |
d62a17ae | 1938 | { |
453844ab | 1939 | struct zebra_vrf *zvrf = vrf_info_lookup(VRF_DEFAULT); |
d62a17ae | 1940 | struct route_node *rn; |
1941 | zebra_fec_t *fec; | |
1942 | struct listnode *node; | |
1943 | struct zserv *fec_client; | |
1944 | int af; | |
1945 | ||
1946 | for (af = AFI_IP; af < AFI_MAX; af++) { | |
1947 | if (zvrf->fec_table[af] == NULL) | |
1948 | continue; | |
1949 | ||
1950 | for (rn = route_top(zvrf->fec_table[af]); rn; | |
1951 | rn = route_next(rn)) { | |
1952 | fec = rn->info; | |
1953 | if (!fec || list_isempty(fec->client_list)) | |
1954 | continue; | |
1955 | ||
1956 | for (ALL_LIST_ELEMENTS_RO(fec->client_list, node, | |
1957 | fec_client)) { | |
1958 | if (fec_client == client) { | |
1959 | listnode_delete(fec->client_list, | |
1960 | fec_client); | |
1961 | if (!(fec->flags & FEC_FLAG_CONFIGURED) | |
1962 | && list_isempty(fec->client_list)) | |
1963 | fec_del(fec); | |
1964 | break; | |
1965 | } | |
1966 | } | |
1967 | } | |
1968 | } | |
5aba114a | 1969 | |
d62a17ae | 1970 | return 0; |
5aba114a DS |
1971 | } |
1972 | ||
f31e084c DS |
1973 | /* |
1974 | * Return FEC (if any) to which this label is bound. | |
1975 | * Note: Only works for per-prefix binding and when the label is not | |
1976 | * implicit-null. | |
1977 | * TODO: Currently walks entire table, can optimize later with another | |
1978 | * hash.. | |
1979 | */ | |
d62a17ae | 1980 | zebra_fec_t *zebra_mpls_fec_for_label(struct zebra_vrf *zvrf, |
1981 | mpls_label_t label) | |
1982 | { | |
1983 | struct route_node *rn; | |
1984 | zebra_fec_t *fec; | |
1985 | int af; | |
1986 | ||
1987 | for (af = AFI_IP; af < AFI_MAX; af++) { | |
1988 | if (zvrf->fec_table[af] == NULL) | |
1989 | continue; | |
1990 | ||
1991 | for (rn = route_top(zvrf->fec_table[af]); rn; | |
1992 | rn = route_next(rn)) { | |
1993 | if (!rn->info) | |
1994 | continue; | |
1995 | fec = rn->info; | |
1996 | if (fec->label == label) | |
1997 | return fec; | |
1998 | } | |
1999 | } | |
f31e084c | 2000 | |
d62a17ae | 2001 | return NULL; |
f31e084c DS |
2002 | } |
2003 | ||
2004 | /* | |
2005 | * Inform if specified label is currently bound to a FEC or not. | |
2006 | */ | |
d62a17ae | 2007 | int zebra_mpls_label_already_bound(struct zebra_vrf *zvrf, mpls_label_t label) |
f31e084c | 2008 | { |
d62a17ae | 2009 | return (zebra_mpls_fec_for_label(zvrf, label) ? 1 : 0); |
f31e084c DS |
2010 | } |
2011 | ||
2012 | /* | |
5aba114a | 2013 | * Add static FEC to label binding. If there are clients registered for this |
a64448ba DS |
2014 | * FEC, notify them. If there are labeled routes for this FEC, install the |
2015 | * label forwarding entry. | |
9d303b37 | 2016 | */ |
d62a17ae | 2017 | int zebra_mpls_static_fec_add(struct zebra_vrf *zvrf, struct prefix *p, |
2018 | mpls_label_t in_label) | |
2019 | { | |
2020 | struct route_table *table; | |
2021 | zebra_fec_t *fec; | |
2022 | char buf[BUFSIZ]; | |
2023 | mpls_label_t old_label; | |
2024 | int ret = 0; | |
2025 | ||
2026 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
2027 | if (!table) | |
2028 | return -1; | |
2029 | ||
2030 | if (IS_ZEBRA_DEBUG_MPLS) | |
2031 | prefix2str(p, buf, BUFSIZ); | |
2032 | ||
2033 | /* Update existing FEC or create a new one. */ | |
2034 | fec = fec_find(table, p); | |
2035 | if (!fec) { | |
2036 | fec = fec_add(table, p, in_label, FEC_FLAG_CONFIGURED, | |
2037 | MPLS_INVALID_LABEL_INDEX); | |
2038 | if (!fec) { | |
2039 | prefix2str(p, buf, BUFSIZ); | |
2040 | zlog_err("Failed to add FEC %s upon config", buf); | |
2041 | return -1; | |
2042 | } | |
2043 | ||
2044 | if (IS_ZEBRA_DEBUG_MPLS) | |
2045 | zlog_debug("Add fec %s label %u", buf, in_label); | |
2046 | } else { | |
2047 | fec->flags |= FEC_FLAG_CONFIGURED; | |
2048 | if (fec->label == in_label) | |
2049 | /* Duplicate config */ | |
2050 | return 0; | |
2051 | ||
2052 | /* Label change, update clients. */ | |
2053 | old_label = fec->label; | |
2054 | if (IS_ZEBRA_DEBUG_MPLS) | |
2055 | zlog_debug("Update fec %s new label %u", buf, in_label); | |
2056 | ||
2057 | fec->label = in_label; | |
2058 | fec_update_clients(fec); | |
2059 | ||
2060 | /* Update label forwarding entries appropriately */ | |
2061 | ret = fec_change_update_lsp(zvrf, fec, old_label); | |
2062 | } | |
2063 | ||
2064 | return ret; | |
f31e084c DS |
2065 | } |
2066 | ||
2067 | /* | |
5aba114a DS |
2068 | * Remove static FEC to label binding. If there are no clients registered |
2069 | * for this FEC, delete the FEC; else notify clients | |
28d58fd7 VV |
2070 | * Note: Upon delete of static binding, if label index exists for this FEC, |
2071 | * client may need to be updated with derived label. | |
f31e084c | 2072 | */ |
d62a17ae | 2073 | int zebra_mpls_static_fec_del(struct zebra_vrf *zvrf, struct prefix *p) |
2074 | { | |
2075 | struct route_table *table; | |
2076 | zebra_fec_t *fec; | |
2077 | mpls_label_t old_label; | |
2078 | char buf[BUFSIZ]; | |
2079 | ||
2080 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; | |
2081 | if (!table) | |
2082 | return -1; | |
2083 | ||
2084 | fec = fec_find(table, p); | |
2085 | if (!fec) { | |
2086 | prefix2str(p, buf, BUFSIZ); | |
2087 | zlog_err("Failed to find FEC %s upon delete", buf); | |
2088 | return -1; | |
2089 | } | |
2090 | ||
2091 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2092 | prefix2str(p, buf, BUFSIZ); | |
2093 | zlog_debug("Delete fec %s label index %u", buf, | |
2094 | fec->label_index); | |
2095 | } | |
2096 | ||
2097 | old_label = fec->label; | |
2098 | fec->flags &= ~FEC_FLAG_CONFIGURED; | |
2099 | fec->label = MPLS_INVALID_LABEL; | |
2100 | ||
2101 | /* If no client exists, just delete the FEC. */ | |
2102 | if (list_isempty(fec->client_list)) { | |
2103 | fec_del(fec); | |
2104 | return 0; | |
2105 | } | |
2106 | ||
2107 | /* Derive the local label (from label index) or reset it. */ | |
2108 | fec_derive_label_from_index(zvrf, fec); | |
2109 | ||
2110 | /* If there is a label change, update clients. */ | |
2111 | if (fec->label == old_label) | |
2112 | return 0; | |
2113 | fec_update_clients(fec); | |
2114 | ||
2115 | /* Update label forwarding entries appropriately */ | |
2116 | return fec_change_update_lsp(zvrf, fec, old_label); | |
f31e084c DS |
2117 | } |
2118 | ||
2119 | /* | |
2120 | * Display MPLS FEC to label binding configuration (VTY command handler). | |
2121 | */ | |
d62a17ae | 2122 | int zebra_mpls_write_fec_config(struct vty *vty, struct zebra_vrf *zvrf) |
f31e084c | 2123 | { |
d62a17ae | 2124 | struct route_node *rn; |
2125 | int af; | |
2126 | zebra_fec_t *fec; | |
2127 | char buf[BUFSIZ]; | |
2128 | int write = 0; | |
f31e084c | 2129 | |
d62a17ae | 2130 | for (af = AFI_IP; af < AFI_MAX; af++) { |
2131 | if (zvrf->fec_table[af] == NULL) | |
2132 | continue; | |
f31e084c | 2133 | |
d62a17ae | 2134 | for (rn = route_top(zvrf->fec_table[af]); rn; |
2135 | rn = route_next(rn)) { | |
2136 | if (!rn->info) | |
2137 | continue; | |
f31e084c | 2138 | |
d62a17ae | 2139 | char lstr[BUFSIZ]; |
2140 | fec = rn->info; | |
f31e084c | 2141 | |
d62a17ae | 2142 | if (!(fec->flags & FEC_FLAG_CONFIGURED)) |
2143 | continue; | |
f31e084c | 2144 | |
d62a17ae | 2145 | write = 1; |
2146 | prefix2str(&rn->p, buf, BUFSIZ); | |
2147 | vty_out(vty, "mpls label bind %s %s\n", buf, | |
2148 | label2str(fec->label, lstr, BUFSIZ)); | |
2149 | } | |
2150 | } | |
f31e084c | 2151 | |
d62a17ae | 2152 | return write; |
f31e084c DS |
2153 | } |
2154 | ||
2155 | /* | |
2156 | * Display MPLS FEC to label binding (VTY command handler). | |
2157 | */ | |
d62a17ae | 2158 | void zebra_mpls_print_fec_table(struct vty *vty, struct zebra_vrf *zvrf) |
f31e084c | 2159 | { |
d62a17ae | 2160 | struct route_node *rn; |
2161 | int af; | |
f31e084c | 2162 | |
d62a17ae | 2163 | for (af = AFI_IP; af < AFI_MAX; af++) { |
2164 | if (zvrf->fec_table[af] == NULL) | |
2165 | continue; | |
f31e084c | 2166 | |
d62a17ae | 2167 | for (rn = route_top(zvrf->fec_table[af]); rn; |
2168 | rn = route_next(rn)) { | |
2169 | if (!rn->info) | |
2170 | continue; | |
2171 | fec_print(rn->info, vty); | |
2172 | } | |
2173 | } | |
f31e084c DS |
2174 | } |
2175 | ||
2176 | /* | |
2177 | * Display MPLS FEC to label binding for a specific FEC (VTY command handler). | |
2178 | */ | |
d62a17ae | 2179 | void zebra_mpls_print_fec(struct vty *vty, struct zebra_vrf *zvrf, |
2180 | struct prefix *p) | |
f31e084c | 2181 | { |
d62a17ae | 2182 | struct route_table *table; |
2183 | struct route_node *rn; | |
f31e084c | 2184 | |
d62a17ae | 2185 | table = zvrf->fec_table[family2afi(PREFIX_FAMILY(p))]; |
2186 | if (!table) | |
2187 | return; | |
f31e084c | 2188 | |
d62a17ae | 2189 | apply_mask(p); |
2190 | rn = route_node_lookup(table, p); | |
2191 | if (!rn) | |
2192 | return; | |
f31e084c | 2193 | |
d62a17ae | 2194 | route_unlock_node(rn); |
2195 | if (!rn->info) | |
2196 | return; | |
f31e084c | 2197 | |
d62a17ae | 2198 | fec_print(rn->info, vty); |
f31e084c DS |
2199 | } |
2200 | ||
8f77d0ee DS |
2201 | static bool mpls_ftn_update_nexthop(int add, struct nexthop *nexthop, |
2202 | enum lsp_types_t type, mpls_label_t label) | |
2203 | { | |
2204 | if (add && nexthop->nh_label_type == ZEBRA_LSP_NONE) | |
2205 | nexthop_add_labels(nexthop, type, 1, &label); | |
2206 | else if (!add && nexthop->nh_label_type == type) | |
2207 | nexthop_del_labels(nexthop); | |
2208 | else | |
2209 | return false; | |
2210 | ||
2211 | return true; | |
2212 | } | |
2213 | ||
ce549947 RW |
2214 | /* |
2215 | * Install/uninstall a FEC-To-NHLFE (FTN) binding. | |
2216 | */ | |
d62a17ae | 2217 | int mpls_ftn_update(int add, struct zebra_vrf *zvrf, enum lsp_types_t type, |
2218 | struct prefix *prefix, enum nexthop_types_t gtype, | |
d7c0a89a | 2219 | union g_addr *gate, ifindex_t ifindex, uint8_t distance, |
d62a17ae | 2220 | mpls_label_t out_label) |
2221 | { | |
2222 | struct route_table *table; | |
2223 | struct route_node *rn; | |
2224 | struct route_entry *re; | |
2225 | struct nexthop *nexthop; | |
8f77d0ee | 2226 | bool found; |
d62a17ae | 2227 | |
2228 | /* Lookup table. */ | |
2229 | table = zebra_vrf_table(family2afi(prefix->family), SAFI_UNICAST, | |
2230 | zvrf_id(zvrf)); | |
2231 | if (!table) | |
2232 | return -1; | |
2233 | ||
2234 | /* Lookup existing route */ | |
2235 | rn = route_node_get(table, prefix); | |
a2addae8 | 2236 | RNODE_FOREACH_RE (rn, re) { |
d62a17ae | 2237 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
2238 | continue; | |
2239 | if (re->distance == distance) | |
2240 | break; | |
88d88a9c | 2241 | } |
ce549947 | 2242 | |
d62a17ae | 2243 | if (re == NULL) |
2244 | return -1; | |
2245 | ||
8f77d0ee | 2246 | found = false; |
7ee30f28 | 2247 | for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) { |
d62a17ae | 2248 | switch (nexthop->type) { |
2249 | case NEXTHOP_TYPE_IPV4: | |
2250 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
2251 | if (gtype != NEXTHOP_TYPE_IPV4 | |
2252 | && gtype != NEXTHOP_TYPE_IPV4_IFINDEX) | |
2253 | continue; | |
2254 | if (!IPV4_ADDR_SAME(&nexthop->gate.ipv4, &gate->ipv4)) | |
2255 | continue; | |
2256 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
2257 | && nexthop->ifindex != ifindex) | |
2258 | continue; | |
8f77d0ee DS |
2259 | if (!mpls_ftn_update_nexthop(add, nexthop, type, |
2260 | out_label)) | |
2261 | return 0; | |
2262 | found = true; | |
2263 | break; | |
d62a17ae | 2264 | case NEXTHOP_TYPE_IPV6: |
2265 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
2266 | if (gtype != NEXTHOP_TYPE_IPV6 | |
2267 | && gtype != NEXTHOP_TYPE_IPV6_IFINDEX) | |
2268 | continue; | |
2269 | if (!IPV6_ADDR_SAME(&nexthop->gate.ipv6, &gate->ipv6)) | |
2270 | continue; | |
2271 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX | |
2272 | && nexthop->ifindex != ifindex) | |
2273 | continue; | |
8f77d0ee DS |
2274 | if (!mpls_ftn_update_nexthop(add, nexthop, type, |
2275 | out_label)) | |
2276 | return 0; | |
2277 | found = true; | |
2278 | break; | |
d62a17ae | 2279 | default: |
2280 | break; | |
2281 | } | |
2282 | } | |
d62a17ae | 2283 | |
8f77d0ee DS |
2284 | if (!found) |
2285 | return -1; | |
ce549947 | 2286 | |
d62a17ae | 2287 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); |
332ad713 | 2288 | SET_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED); |
d62a17ae | 2289 | rib_queue_add(rn); |
ce549947 | 2290 | |
d62a17ae | 2291 | return 0; |
ce549947 RW |
2292 | } |
2293 | ||
2294 | /* | |
2295 | * Install/update a NHLFE for an LSP in the forwarding table. This may be | |
2296 | * a new LSP entry or a new NHLFE for an existing in-label or an update of | |
2297 | * the out-label for an existing NHLFE (update case). | |
2298 | */ | |
d62a17ae | 2299 | int mpls_lsp_install(struct zebra_vrf *zvrf, enum lsp_types_t type, |
2300 | mpls_label_t in_label, mpls_label_t out_label, | |
2301 | enum nexthop_types_t gtype, union g_addr *gate, | |
2302 | ifindex_t ifindex) | |
2303 | { | |
2304 | struct hash *lsp_table; | |
2305 | zebra_ile_t tmp_ile; | |
2306 | zebra_lsp_t *lsp; | |
2307 | zebra_nhlfe_t *nhlfe; | |
2308 | char buf[BUFSIZ]; | |
2309 | ||
2310 | /* Lookup table. */ | |
2311 | lsp_table = zvrf->lsp_table; | |
2312 | if (!lsp_table) | |
2313 | return -1; | |
2314 | ||
2315 | /* If entry is present, exit. */ | |
2316 | tmp_ile.in_label = in_label; | |
2317 | lsp = hash_get(lsp_table, &tmp_ile, lsp_alloc); | |
2318 | if (!lsp) | |
2319 | return -1; | |
2320 | nhlfe = nhlfe_find(lsp, type, gtype, gate, ifindex); | |
2321 | if (nhlfe) { | |
2322 | struct nexthop *nh = nhlfe->nexthop; | |
2323 | ||
2324 | assert(nh); | |
2325 | assert(nh->nh_label); | |
2326 | ||
2327 | /* Clear deleted flag (in case it was set) */ | |
2328 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
2329 | if (nh->nh_label->label[0] == out_label) | |
2330 | /* No change */ | |
2331 | return 0; | |
2332 | ||
2333 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2334 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
2335 | zlog_debug( | |
2336 | "LSP in-label %u type %d nexthop %s " | |
2337 | "out-label changed to %u (old %u)", | |
2338 | in_label, type, buf, out_label, | |
2339 | nh->nh_label->label[0]); | |
2340 | } | |
2341 | ||
2342 | /* Update out label, trigger processing. */ | |
2343 | nh->nh_label->label[0] = out_label; | |
2344 | } else { | |
2345 | /* Add LSP entry to this nexthop */ | |
2346 | nhlfe = nhlfe_add(lsp, type, gtype, gate, ifindex, out_label); | |
2347 | if (!nhlfe) | |
2348 | return -1; | |
2349 | ||
2350 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2351 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
2352 | zlog_debug( | |
2353 | "Add LSP in-label %u type %d nexthop %s " | |
2354 | "out-label %u", | |
2355 | in_label, type, buf, out_label); | |
2356 | } | |
2357 | ||
2358 | lsp->addr_family = NHLFE_FAMILY(nhlfe); | |
2359 | } | |
2360 | ||
2361 | /* Mark NHLFE, queue LSP for processing. */ | |
2362 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
2363 | if (lsp_processq_add(lsp)) | |
2364 | return -1; | |
2365 | ||
2366 | return 0; | |
ce549947 RW |
2367 | } |
2368 | ||
2369 | /* | |
2370 | * Uninstall a particular NHLFE in the forwarding table. If this is | |
2371 | * the only NHLFE, the entire LSP forwarding entry has to be deleted. | |
2372 | */ | |
d62a17ae | 2373 | int mpls_lsp_uninstall(struct zebra_vrf *zvrf, enum lsp_types_t type, |
2374 | mpls_label_t in_label, enum nexthop_types_t gtype, | |
2375 | union g_addr *gate, ifindex_t ifindex) | |
2376 | { | |
2377 | struct hash *lsp_table; | |
2378 | zebra_ile_t tmp_ile; | |
2379 | zebra_lsp_t *lsp; | |
2380 | zebra_nhlfe_t *nhlfe; | |
2381 | char buf[BUFSIZ]; | |
2382 | ||
2383 | /* Lookup table. */ | |
2384 | lsp_table = zvrf->lsp_table; | |
2385 | if (!lsp_table) | |
2386 | return -1; | |
2387 | ||
2388 | /* If entry is not present, exit. */ | |
2389 | tmp_ile.in_label = in_label; | |
2390 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
2391 | if (!lsp) | |
2392 | return 0; | |
2393 | nhlfe = nhlfe_find(lsp, type, gtype, gate, ifindex); | |
2394 | if (!nhlfe) | |
2395 | return 0; | |
2396 | ||
2397 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2398 | nhlfe2str(nhlfe, buf, BUFSIZ); | |
2399 | zlog_debug("Del LSP in-label %u type %d nexthop %s flags 0x%x", | |
2400 | in_label, type, buf, nhlfe->flags); | |
2401 | } | |
2402 | ||
2403 | /* Mark NHLFE for delete or directly delete, as appropriate. */ | |
2404 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED)) { | |
2405 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_CHANGED); | |
2406 | SET_FLAG(nhlfe->flags, NHLFE_FLAG_DELETED); | |
2407 | if (lsp_processq_add(lsp)) | |
2408 | return -1; | |
2409 | } else { | |
2410 | nhlfe_del(nhlfe); | |
2411 | ||
2412 | /* Free LSP entry if no other NHLFEs and not scheduled. */ | |
2413 | if (!lsp->nhlfe_list | |
2414 | && !CHECK_FLAG(lsp->flags, LSP_FLAG_SCHEDULED)) { | |
2415 | if (IS_ZEBRA_DEBUG_MPLS) | |
2416 | zlog_debug("Free LSP in-label %u flags 0x%x", | |
2417 | lsp->ile.in_label, lsp->flags); | |
2418 | ||
2419 | lsp = hash_release(lsp_table, &lsp->ile); | |
2420 | if (lsp) | |
2421 | XFREE(MTYPE_LSP, lsp); | |
2422 | } | |
2423 | } | |
2424 | return 0; | |
ce549947 RW |
2425 | } |
2426 | ||
2427 | /* | |
2428 | * Uninstall all LDP NHLFEs for a particular LSP forwarding entry. | |
2429 | * If no other NHLFEs exist, the entry would be deleted. | |
2430 | */ | |
d62a17ae | 2431 | void mpls_ldp_lsp_uninstall_all(struct hash_backet *backet, void *ctxt) |
ce549947 | 2432 | { |
d62a17ae | 2433 | zebra_lsp_t *lsp; |
2434 | struct hash *lsp_table; | |
ce549947 | 2435 | |
d62a17ae | 2436 | lsp = (zebra_lsp_t *)backet->data; |
2437 | if (!lsp || !lsp->nhlfe_list) | |
2438 | return; | |
ce549947 | 2439 | |
d62a17ae | 2440 | lsp_table = ctxt; |
2441 | if (!lsp_table) | |
2442 | return; | |
ce549947 | 2443 | |
d62a17ae | 2444 | mpls_lsp_uninstall_all(lsp_table, lsp, ZEBRA_LSP_LDP); |
ce549947 RW |
2445 | } |
2446 | ||
2447 | /* | |
2448 | * Uninstall all LDP FEC-To-NHLFE (FTN) bindings of the given address-family. | |
2449 | */ | |
d62a17ae | 2450 | void mpls_ldp_ftn_uninstall_all(struct zebra_vrf *zvrf, int afi) |
2451 | { | |
2452 | struct route_table *table; | |
2453 | struct route_node *rn; | |
2454 | struct route_entry *re; | |
2455 | struct nexthop *nexthop; | |
2456 | int update; | |
2457 | ||
2458 | /* Process routes of interested address-families. */ | |
2459 | table = zebra_vrf_table(afi, SAFI_UNICAST, zvrf_id(zvrf)); | |
2460 | if (!table) | |
2461 | return; | |
2462 | ||
2463 | for (rn = route_top(table); rn; rn = route_next(rn)) { | |
2464 | update = 0; | |
a2addae8 | 2465 | RNODE_FOREACH_RE (rn, re) { |
7ee30f28 | 2466 | for (nexthop = re->ng.nexthop; nexthop; |
407c87a6 DS |
2467 | nexthop = nexthop->next) { |
2468 | if (nexthop->nh_label_type != ZEBRA_LSP_LDP) | |
2469 | continue; | |
2470 | ||
d62a17ae | 2471 | nexthop_del_labels(nexthop); |
2472 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
2473 | SET_FLAG(re->status, | |
332ad713 | 2474 | ROUTE_ENTRY_LABELS_CHANGED); |
d62a17ae | 2475 | update = 1; |
2476 | } | |
407c87a6 | 2477 | } |
d62a17ae | 2478 | |
2479 | if (update) | |
2480 | rib_queue_add(rn); | |
2481 | } | |
ce549947 RW |
2482 | } |
2483 | ||
1c1cf002 | 2484 | #if defined(HAVE_CUMULUS) |
7758e3f3 | 2485 | /* |
2486 | * Check that the label values used in LSP creation are consistent. The | |
2487 | * main criteria is that if there is ECMP, the label operation must still | |
2488 | * be consistent - i.e., all paths either do a swap or do PHP. This is due | |
2489 | * to current HW restrictions. | |
2490 | */ | |
d62a17ae | 2491 | int zebra_mpls_lsp_label_consistent(struct zebra_vrf *zvrf, |
2492 | mpls_label_t in_label, | |
2493 | mpls_label_t out_label, | |
2494 | enum nexthop_types_t gtype, | |
2495 | union g_addr *gate, ifindex_t ifindex) | |
2496 | { | |
2497 | struct hash *slsp_table; | |
2498 | zebra_ile_t tmp_ile; | |
2499 | zebra_slsp_t *slsp; | |
2500 | zebra_snhlfe_t *snhlfe; | |
2501 | ||
2502 | /* Lookup table. */ | |
2503 | slsp_table = zvrf->slsp_table; | |
2504 | if (!slsp_table) | |
2505 | return 0; | |
2506 | ||
2507 | /* If entry is not present, exit. */ | |
2508 | tmp_ile.in_label = in_label; | |
2509 | slsp = hash_lookup(slsp_table, &tmp_ile); | |
2510 | if (!slsp) | |
2511 | return 1; | |
2512 | ||
2513 | snhlfe = snhlfe_find(slsp, gtype, gate, ifindex); | |
2514 | if (snhlfe) { | |
2515 | if (snhlfe->out_label == out_label) | |
2516 | return 1; | |
2517 | ||
2518 | /* If not only NHLFE, cannot allow label change. */ | |
2519 | if (snhlfe != slsp->snhlfe_list || snhlfe->next) | |
2520 | return 0; | |
2521 | } else { | |
2522 | /* If other NHLFEs exist, label operation must match. */ | |
2523 | if (slsp->snhlfe_list) { | |
2524 | int cur_op, new_op; | |
2525 | ||
2526 | cur_op = (slsp->snhlfe_list->out_label | |
70e98a7f DS |
2527 | == MPLS_LABEL_IMPLICIT_NULL); |
2528 | new_op = (out_label == MPLS_LABEL_IMPLICIT_NULL); | |
d62a17ae | 2529 | if (cur_op != new_op) |
2530 | return 0; | |
2531 | } | |
2532 | } | |
2533 | ||
2534 | /* Label values are good. */ | |
2535 | return 1; | |
7758e3f3 | 2536 | } |
1c1cf002 | 2537 | #endif /* HAVE_CUMULUS */ |
7758e3f3 | 2538 | |
2539 | /* | |
2540 | * Add static LSP entry. This may be the first entry for this incoming label | |
2541 | * or an additional nexthop; an existing entry may also have outgoing label | |
2542 | * changed. | |
2543 | * Note: The label operation (swap or PHP) is common for the LSP entry (all | |
2544 | * NHLFEs). | |
2545 | */ | |
d62a17ae | 2546 | int zebra_mpls_static_lsp_add(struct zebra_vrf *zvrf, mpls_label_t in_label, |
2547 | mpls_label_t out_label, | |
2548 | enum nexthop_types_t gtype, union g_addr *gate, | |
2549 | ifindex_t ifindex) | |
2550 | { | |
2551 | struct hash *slsp_table; | |
2552 | zebra_ile_t tmp_ile; | |
2553 | zebra_slsp_t *slsp; | |
2554 | zebra_snhlfe_t *snhlfe; | |
2555 | char buf[BUFSIZ]; | |
2556 | ||
2557 | /* Lookup table. */ | |
2558 | slsp_table = zvrf->slsp_table; | |
2559 | if (!slsp_table) | |
2560 | return -1; | |
2561 | ||
2562 | /* If entry is present, exit. */ | |
2563 | tmp_ile.in_label = in_label; | |
2564 | slsp = hash_get(slsp_table, &tmp_ile, slsp_alloc); | |
2565 | if (!slsp) | |
2566 | return -1; | |
2567 | snhlfe = snhlfe_find(slsp, gtype, gate, ifindex); | |
2568 | if (snhlfe) { | |
2569 | if (snhlfe->out_label == out_label) | |
2570 | /* No change */ | |
2571 | return 0; | |
2572 | ||
2573 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2574 | snhlfe2str(snhlfe, buf, BUFSIZ); | |
2575 | zlog_debug( | |
2576 | "Upd static LSP in-label %u nexthop %s " | |
2577 | "out-label %u (old %u)", | |
2578 | in_label, buf, out_label, snhlfe->out_label); | |
2579 | } | |
2580 | snhlfe->out_label = out_label; | |
2581 | } else { | |
2582 | /* Add static LSP entry to this nexthop */ | |
2583 | snhlfe = snhlfe_add(slsp, gtype, gate, ifindex, out_label); | |
2584 | if (!snhlfe) | |
2585 | return -1; | |
2586 | ||
2587 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2588 | snhlfe2str(snhlfe, buf, BUFSIZ); | |
2589 | zlog_debug( | |
2590 | "Add static LSP in-label %u nexthop %s out-label %u", | |
2591 | in_label, buf, out_label); | |
2592 | } | |
2593 | } | |
2594 | ||
2595 | /* (Re)Install LSP in the main table. */ | |
2596 | if (mpls_lsp_install(zvrf, ZEBRA_LSP_STATIC, in_label, out_label, gtype, | |
2597 | gate, ifindex)) | |
2598 | return -1; | |
2599 | ||
2600 | return 0; | |
7758e3f3 | 2601 | } |
2602 | ||
2603 | /* | |
2604 | * Delete static LSP entry. This may be the delete of one particular | |
2605 | * NHLFE for this incoming label or the delete of the entire entry (i.e., | |
2606 | * all NHLFEs). | |
2607 | * NOTE: Delete of the only NHLFE will also end up deleting the entire | |
2608 | * LSP configuration. | |
2609 | */ | |
d62a17ae | 2610 | int zebra_mpls_static_lsp_del(struct zebra_vrf *zvrf, mpls_label_t in_label, |
2611 | enum nexthop_types_t gtype, union g_addr *gate, | |
2612 | ifindex_t ifindex) | |
2613 | { | |
2614 | struct hash *slsp_table; | |
2615 | zebra_ile_t tmp_ile; | |
2616 | zebra_slsp_t *slsp; | |
2617 | zebra_snhlfe_t *snhlfe; | |
2618 | ||
2619 | /* Lookup table. */ | |
2620 | slsp_table = zvrf->slsp_table; | |
2621 | if (!slsp_table) | |
2622 | return -1; | |
2623 | ||
2624 | /* If entry is not present, exit. */ | |
2625 | tmp_ile.in_label = in_label; | |
2626 | slsp = hash_lookup(slsp_table, &tmp_ile); | |
2627 | if (!slsp) | |
2628 | return 0; | |
2629 | ||
2630 | /* Is it delete of entire LSP or a specific NHLFE? */ | |
2631 | if (gtype == NEXTHOP_TYPE_BLACKHOLE) { | |
2632 | if (IS_ZEBRA_DEBUG_MPLS) | |
2633 | zlog_debug("Del static LSP in-label %u", in_label); | |
2634 | ||
2635 | /* Uninstall entire LSP from the main table. */ | |
2636 | mpls_static_lsp_uninstall_all(zvrf, in_label); | |
2637 | ||
2638 | /* Delete all static NHLFEs */ | |
2639 | snhlfe_del_all(slsp); | |
2640 | } else { | |
2641 | /* Find specific NHLFE, exit if not found. */ | |
2642 | snhlfe = snhlfe_find(slsp, gtype, gate, ifindex); | |
2643 | if (!snhlfe) | |
2644 | return 0; | |
2645 | ||
2646 | if (IS_ZEBRA_DEBUG_MPLS) { | |
2647 | char buf[BUFSIZ]; | |
2648 | snhlfe2str(snhlfe, buf, BUFSIZ); | |
2649 | zlog_debug("Del static LSP in-label %u nexthop %s", | |
2650 | in_label, buf); | |
2651 | } | |
2652 | ||
2653 | /* Uninstall LSP from the main table. */ | |
2654 | mpls_lsp_uninstall(zvrf, ZEBRA_LSP_STATIC, in_label, gtype, | |
2655 | gate, ifindex); | |
2656 | ||
2657 | /* Delete static LSP NHLFE */ | |
2658 | snhlfe_del(snhlfe); | |
2659 | } | |
2660 | ||
2661 | /* Remove entire static LSP entry if no NHLFE - valid in either case | |
2662 | * above. */ | |
2663 | if (!slsp->snhlfe_list) { | |
2664 | slsp = hash_release(slsp_table, &tmp_ile); | |
2665 | if (slsp) | |
2666 | XFREE(MTYPE_SLSP, slsp); | |
2667 | } | |
2668 | ||
2669 | return 0; | |
7758e3f3 | 2670 | } |
2671 | ||
40c7bdb0 | 2672 | /* |
2673 | * Schedule all MPLS label forwarding entries for processing. | |
2674 | * Called upon changes that may affect one or more of them such as | |
2675 | * interface or nexthop state changes. | |
2676 | */ | |
d62a17ae | 2677 | void zebra_mpls_lsp_schedule(struct zebra_vrf *zvrf) |
40c7bdb0 | 2678 | { |
d62a17ae | 2679 | if (!zvrf) |
2680 | return; | |
2681 | hash_iterate(zvrf->lsp_table, lsp_schedule, NULL); | |
40c7bdb0 | 2682 | } |
2683 | ||
3ab18ff2 | 2684 | /* |
2685 | * Display MPLS label forwarding table for a specific LSP | |
2686 | * (VTY command handler). | |
2687 | */ | |
d62a17ae | 2688 | void zebra_mpls_print_lsp(struct vty *vty, struct zebra_vrf *zvrf, |
d7c0a89a | 2689 | mpls_label_t label, uint8_t use_json) |
3ab18ff2 | 2690 | { |
d62a17ae | 2691 | struct hash *lsp_table; |
2692 | zebra_lsp_t *lsp; | |
2693 | zebra_ile_t tmp_ile; | |
2694 | json_object *json = NULL; | |
3ab18ff2 | 2695 | |
d62a17ae | 2696 | /* Lookup table. */ |
2697 | lsp_table = zvrf->lsp_table; | |
2698 | if (!lsp_table) | |
2699 | return; | |
3ab18ff2 | 2700 | |
d62a17ae | 2701 | /* If entry is not present, exit. */ |
2702 | tmp_ile.in_label = label; | |
2703 | lsp = hash_lookup(lsp_table, &tmp_ile); | |
2704 | if (!lsp) | |
2705 | return; | |
3ab18ff2 | 2706 | |
d62a17ae | 2707 | if (use_json) { |
2708 | json = lsp_json(lsp); | |
9d303b37 DL |
2709 | vty_out(vty, "%s\n", json_object_to_json_string_ext( |
2710 | json, JSON_C_TO_STRING_PRETTY)); | |
d62a17ae | 2711 | json_object_free(json); |
2712 | } else | |
2713 | lsp_print(lsp, (void *)vty); | |
3ab18ff2 | 2714 | } |
2715 | ||
2716 | /* | |
2717 | * Display MPLS label forwarding table (VTY command handler). | |
2718 | */ | |
d62a17ae | 2719 | void zebra_mpls_print_lsp_table(struct vty *vty, struct zebra_vrf *zvrf, |
d7c0a89a | 2720 | uint8_t use_json) |
d62a17ae | 2721 | { |
2722 | char buf[BUFSIZ]; | |
2723 | json_object *json = NULL; | |
2724 | zebra_lsp_t *lsp = NULL; | |
2725 | zebra_nhlfe_t *nhlfe = NULL; | |
2726 | struct nexthop *nexthop = NULL; | |
2727 | struct listnode *node = NULL; | |
2728 | struct list *lsp_list = hash_get_sorted_list(zvrf->lsp_table, lsp_cmp); | |
2729 | ||
2730 | if (use_json) { | |
2731 | json = json_object_new_object(); | |
2732 | ||
2733 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) | |
2734 | json_object_object_add( | |
2735 | json, label2str(lsp->ile.in_label, buf, BUFSIZ), | |
2736 | lsp_json(lsp)); | |
2737 | ||
9d303b37 DL |
2738 | vty_out(vty, "%s\n", json_object_to_json_string_ext( |
2739 | json, JSON_C_TO_STRING_PRETTY)); | |
d62a17ae | 2740 | json_object_free(json); |
2741 | } else { | |
2742 | vty_out(vty, " Inbound Outbound\n"); | |
2743 | vty_out(vty, " Label Type Nexthop Label\n"); | |
2744 | vty_out(vty, "-------- ------- --------------- --------\n"); | |
2745 | ||
2746 | for (ALL_LIST_ELEMENTS_RO(lsp_list, node, lsp)) { | |
2747 | for (nhlfe = lsp->nhlfe_list; nhlfe; | |
2748 | nhlfe = nhlfe->next) { | |
2749 | vty_out(vty, "%8d %7s ", lsp->ile.in_label, | |
2750 | nhlfe_type2str(nhlfe->type)); | |
2751 | nexthop = nhlfe->nexthop; | |
2752 | ||
2753 | switch (nexthop->type) { | |
996c9314 | 2754 | case NEXTHOP_TYPE_IFINDEX: { |
b9abd9ad DS |
2755 | struct interface *ifp; |
2756 | ||
2757 | ifp = if_lookup_by_index( | |
2758 | nexthop->ifindex, VRF_UNKNOWN); | |
2759 | vty_out(vty, "%15s", ifp->name); | |
2760 | break; | |
2761 | } | |
d62a17ae | 2762 | case NEXTHOP_TYPE_IPV4: |
2763 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
2764 | vty_out(vty, "%15s", | |
2765 | inet_ntoa(nexthop->gate.ipv4)); | |
2766 | break; | |
2767 | case NEXTHOP_TYPE_IPV6: | |
2768 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
2769 | vty_out(vty, "%15s", | |
2770 | inet_ntop(AF_INET6, | |
2771 | &nexthop->gate.ipv6, | |
2772 | buf, BUFSIZ)); | |
2773 | break; | |
2774 | default: | |
2775 | break; | |
2776 | } | |
2777 | ||
b9abd9ad | 2778 | if (nexthop->type != NEXTHOP_TYPE_IFINDEX) |
fc5cca9f DS |
2779 | vty_out(vty, " %8s\n", |
2780 | mpls_label2str( | |
2781 | nexthop->nh_label | |
2782 | ->num_labels, | |
2783 | &nexthop->nh_label | |
2784 | ->label[0], | |
2785 | buf, BUFSIZ, 1)); | |
b9abd9ad DS |
2786 | else |
2787 | vty_out(vty, "\n"); | |
d62a17ae | 2788 | } |
2789 | } | |
2790 | ||
2791 | vty_out(vty, "\n"); | |
2792 | } | |
2793 | ||
affe9e99 | 2794 | list_delete_and_null(&lsp_list); |
3ab18ff2 | 2795 | } |
2796 | ||
7758e3f3 | 2797 | /* |
2798 | * Display MPLS LSP configuration of all static LSPs (VTY command handler). | |
2799 | */ | |
d62a17ae | 2800 | int zebra_mpls_write_lsp_config(struct vty *vty, struct zebra_vrf *zvrf) |
2801 | { | |
2802 | zebra_slsp_t *slsp; | |
2803 | zebra_snhlfe_t *snhlfe; | |
2804 | struct listnode *node; | |
2805 | struct list *slsp_list = | |
2806 | hash_get_sorted_list(zvrf->slsp_table, slsp_cmp); | |
2807 | ||
2808 | for (ALL_LIST_ELEMENTS_RO(slsp_list, node, slsp)) { | |
2809 | for (snhlfe = slsp->snhlfe_list; snhlfe; | |
2810 | snhlfe = snhlfe->next) { | |
0af35d90 | 2811 | char buf[BUFSIZ]; |
d62a17ae | 2812 | char lstr[30]; |
2813 | ||
0af35d90 | 2814 | snhlfe2str(snhlfe, buf, sizeof(buf)); |
d62a17ae | 2815 | switch (snhlfe->out_label) { |
70e98a7f DS |
2816 | case MPLS_LABEL_IPV4_EXPLICIT_NULL: |
2817 | case MPLS_LABEL_IPV6_EXPLICIT_NULL: | |
d62a17ae | 2818 | strlcpy(lstr, "explicit-null", sizeof(lstr)); |
2819 | break; | |
70e98a7f | 2820 | case MPLS_LABEL_IMPLICIT_NULL: |
d62a17ae | 2821 | strlcpy(lstr, "implicit-null", sizeof(lstr)); |
2822 | break; | |
2823 | default: | |
2824 | sprintf(lstr, "%u", snhlfe->out_label); | |
2825 | break; | |
2826 | } | |
2827 | ||
2828 | vty_out(vty, "mpls lsp %u %s %s\n", slsp->ile.in_label, | |
2829 | buf, lstr); | |
2830 | } | |
2831 | } | |
b78b820d | 2832 | |
affe9e99 | 2833 | list_delete_and_null(&slsp_list); |
d62a17ae | 2834 | return (zvrf->slsp_table->count ? 1 : 0); |
7758e3f3 | 2835 | } |
2836 | ||
1b6d5c7e VV |
2837 | /* |
2838 | * Add/update global label block. | |
2839 | */ | |
d7c0a89a QY |
2840 | int zebra_mpls_label_block_add(struct zebra_vrf *zvrf, uint32_t start_label, |
2841 | uint32_t end_label) | |
1b6d5c7e | 2842 | { |
d62a17ae | 2843 | zvrf->mpls_srgb.start_label = start_label; |
2844 | zvrf->mpls_srgb.end_label = end_label; | |
28d58fd7 | 2845 | |
d62a17ae | 2846 | /* Evaluate registered FECs to see if any get a label or not. */ |
2847 | fec_evaluate(zvrf); | |
2848 | return 0; | |
1b6d5c7e VV |
2849 | } |
2850 | ||
2851 | /* | |
2852 | * Delete global label block. | |
2853 | */ | |
d62a17ae | 2854 | int zebra_mpls_label_block_del(struct zebra_vrf *zvrf) |
1b6d5c7e | 2855 | { |
d62a17ae | 2856 | zvrf->mpls_srgb.start_label = MPLS_DEFAULT_MIN_SRGB_LABEL; |
2857 | zvrf->mpls_srgb.end_label = MPLS_DEFAULT_MAX_SRGB_LABEL; | |
28d58fd7 | 2858 | |
d62a17ae | 2859 | /* Process registered FECs to clear their local label, if needed. */ |
2860 | fec_evaluate(zvrf); | |
2861 | return 0; | |
1b6d5c7e VV |
2862 | } |
2863 | ||
2864 | /* | |
2865 | * Display MPLS global label block configuration (VTY command handler). | |
2866 | */ | |
d62a17ae | 2867 | int zebra_mpls_write_label_block_config(struct vty *vty, struct zebra_vrf *zvrf) |
1b6d5c7e | 2868 | { |
d62a17ae | 2869 | if (zvrf->mpls_srgb.start_label == 0) |
2870 | return 0; | |
1b6d5c7e | 2871 | |
d62a17ae | 2872 | if ((zvrf->mpls_srgb.start_label != MPLS_DEFAULT_MIN_SRGB_LABEL) |
2873 | || (zvrf->mpls_srgb.end_label != MPLS_DEFAULT_MAX_SRGB_LABEL)) { | |
2874 | vty_out(vty, "mpls label global-block %u %u\n", | |
2875 | zvrf->mpls_srgb.start_label, zvrf->mpls_srgb.end_label); | |
2876 | } | |
1b6d5c7e | 2877 | |
d62a17ae | 2878 | return 1; |
1b6d5c7e VV |
2879 | } |
2880 | ||
84915b0a | 2881 | /* |
2882 | * Called when VRF becomes inactive, cleans up information but keeps | |
2883 | * the table itself. | |
2884 | * NOTE: Currently supported only for default VRF. | |
2885 | */ | |
2886 | void zebra_mpls_cleanup_tables(struct zebra_vrf *zvrf) | |
2887 | { | |
2888 | hash_iterate(zvrf->lsp_table, lsp_uninstall_from_kernel, NULL); | |
2889 | } | |
2890 | ||
40c7bdb0 | 2891 | /* |
2892 | * Called upon process exiting, need to delete LSP forwarding | |
2893 | * entries from the kernel. | |
2894 | * NOTE: Currently supported only for default VRF. | |
2895 | */ | |
d62a17ae | 2896 | void zebra_mpls_close_tables(struct zebra_vrf *zvrf) |
40c7bdb0 | 2897 | { |
d62a17ae | 2898 | hash_iterate(zvrf->lsp_table, lsp_uninstall_from_kernel, NULL); |
2899 | hash_clean(zvrf->lsp_table, NULL); | |
2900 | hash_free(zvrf->lsp_table); | |
2901 | hash_clean(zvrf->slsp_table, NULL); | |
2902 | hash_free(zvrf->slsp_table); | |
9b67b514 DS |
2903 | route_table_finish(zvrf->fec_table[AFI_IP]); |
2904 | route_table_finish(zvrf->fec_table[AFI_IP6]); | |
40c7bdb0 | 2905 | } |
2906 | ||
7758e3f3 | 2907 | /* |
2908 | * Allocate MPLS tables for this VRF and do other initialization. | |
2909 | * NOTE: Currently supported only for default VRF. | |
2910 | */ | |
d62a17ae | 2911 | void zebra_mpls_init_tables(struct zebra_vrf *zvrf) |
7758e3f3 | 2912 | { |
d62a17ae | 2913 | if (!zvrf) |
2914 | return; | |
996c9314 LB |
2915 | zvrf->slsp_table = |
2916 | hash_create(label_hash, label_cmp, "ZEBRA SLSP table"); | |
2917 | zvrf->lsp_table = hash_create(label_hash, label_cmp, "ZEBRA LSP table"); | |
d62a17ae | 2918 | zvrf->fec_table[AFI_IP] = route_table_init(); |
2919 | zvrf->fec_table[AFI_IP6] = route_table_init(); | |
2920 | zvrf->mpls_flags = 0; | |
2921 | zvrf->mpls_srgb.start_label = MPLS_DEFAULT_MIN_SRGB_LABEL; | |
2922 | zvrf->mpls_srgb.end_label = MPLS_DEFAULT_MAX_SRGB_LABEL; | |
7758e3f3 | 2923 | } |
2924 | ||
2925 | /* | |
2926 | * Global MPLS initialization. | |
2927 | */ | |
d62a17ae | 2928 | void zebra_mpls_init(void) |
7758e3f3 | 2929 | { |
d62a17ae | 2930 | mpls_enabled = 0; |
33c32282 | 2931 | |
d62a17ae | 2932 | if (mpls_kernel_init() < 0) { |
2933 | zlog_warn("Disabling MPLS support (no kernel support)"); | |
2934 | return; | |
2935 | } | |
fe6c7157 | 2936 | |
d62a17ae | 2937 | if (!mpls_processq_init(&zebrad)) |
2938 | mpls_enabled = 1; | |
453844ab | 2939 | |
21ccc0cf | 2940 | hook_register(zserv_client_close, zebra_mpls_cleanup_fecs_for_client); |
7758e3f3 | 2941 | } |