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718e3744 | 1 | /* Routing Information Base. |
2 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro | |
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 | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
718e3744 | 23 | #include "command.h" |
43e52561 QY |
24 | #include "if.h" |
25 | #include "linklist.h" | |
718e3744 | 26 | #include "log.h" |
43e52561 QY |
27 | #include "memory.h" |
28 | #include "mpls.h" | |
29 | #include "nexthop.h" | |
30 | #include "prefix.h" | |
7514fb77 PJ |
31 | #include "prefix.h" |
32 | #include "routemap.h" | |
43e52561 | 33 | #include "sockunion.h" |
05737783 | 34 | #include "srcdest_table.h" |
43e52561 QY |
35 | #include "table.h" |
36 | #include "thread.h" | |
37 | #include "vrf.h" | |
38 | #include "workqueue.h" | |
50d89650 | 39 | #include "nexthop_group_private.h" |
00dffa8c | 40 | #include "frr_pthread.h" |
718e3744 | 41 | |
89272910 | 42 | #include "zebra/zebra_router.h" |
43e52561 QY |
43 | #include "zebra/connected.h" |
44 | #include "zebra/debug.h" | |
45 | #include "zebra/interface.h" | |
46 | #include "zebra/redistribute.h" | |
718e3744 | 47 | #include "zebra/rib.h" |
48 | #include "zebra/rt.h" | |
43e52561 QY |
49 | #include "zebra/zapi_msg.h" |
50 | #include "zebra/zebra_errors.h" | |
51 | #include "zebra/zebra_memory.h" | |
7c551956 | 52 | #include "zebra/zebra_ns.h" |
fb018d25 | 53 | #include "zebra/zebra_rnh.h" |
43e52561 QY |
54 | #include "zebra/zebra_routemap.h" |
55 | #include "zebra/zebra_vrf.h" | |
6134fd82 | 56 | #include "zebra/zebra_vxlan.h" |
7cdb1a84 MS |
57 | #include "zebra/zapi_msg.h" |
58 | #include "zebra/zebra_dplane.h" | |
59 | ||
2a99ab95 SW |
60 | DEFINE_MTYPE_STATIC(ZEBRA, RIB_UPDATE_CTX, "Rib update context object"); |
61 | ||
7cdb1a84 MS |
62 | /* |
63 | * Event, list, and mutex for delivery of dataplane results | |
64 | */ | |
65 | static pthread_mutex_t dplane_mutex; | |
66 | static struct thread *t_dplane; | |
25779064 | 67 | static struct dplane_ctx_q rib_dplane_q; |
718e3744 | 68 | |
d62a17ae | 69 | DEFINE_HOOK(rib_update, (struct route_node * rn, const char *reason), |
70 | (rn, reason)) | |
4f8ea50c | 71 | |
6baf7bb8 DS |
72 | /* Should we allow non Quagga processes to delete our routes */ |
73 | extern int allow_delete; | |
74 | ||
718e3744 | 75 | /* Each route type's string and default distance value. */ |
d62a17ae | 76 | static const struct { |
77 | int key; | |
8dc7a759 | 78 | uint8_t distance; |
73547a75 | 79 | uint8_t meta_q_map; |
d62a17ae | 80 | } route_info[ZEBRA_ROUTE_MAX] = { |
e22e8001 SW |
81 | [ZEBRA_ROUTE_NHG] = {ZEBRA_ROUTE_NHG, 255 /* Uneeded for nhg's */, 0}, |
82 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0, 5}, | |
83 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0, 1}, | |
84 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0, 1}, | |
85 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1, 2}, | |
86 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120, 3}, | |
87 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120, 3}, | |
88 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110, 3}, | |
89 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110, 3}, | |
90 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115, 3}, | |
91 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */, 4}, | |
92 | [ZEBRA_ROUTE_PIM] = {ZEBRA_ROUTE_PIM, 255, 5}, | |
93 | [ZEBRA_ROUTE_EIGRP] = {ZEBRA_ROUTE_EIGRP, 90, 3}, | |
94 | [ZEBRA_ROUTE_NHRP] = {ZEBRA_ROUTE_NHRP, 10, 3}, | |
95 | [ZEBRA_ROUTE_HSLS] = {ZEBRA_ROUTE_HSLS, 255, 5}, | |
96 | [ZEBRA_ROUTE_OLSR] = {ZEBRA_ROUTE_OLSR, 255, 5}, | |
97 | [ZEBRA_ROUTE_TABLE] = {ZEBRA_ROUTE_TABLE, 150, 2}, | |
98 | [ZEBRA_ROUTE_LDP] = {ZEBRA_ROUTE_LDP, 150, 5}, | |
99 | [ZEBRA_ROUTE_VNC] = {ZEBRA_ROUTE_VNC, 20, 4}, | |
100 | [ZEBRA_ROUTE_VNC_DIRECT] = {ZEBRA_ROUTE_VNC_DIRECT, 20, 4}, | |
101 | [ZEBRA_ROUTE_VNC_DIRECT_RH] = {ZEBRA_ROUTE_VNC_DIRECT_RH, 20, 4}, | |
102 | [ZEBRA_ROUTE_BGP_DIRECT] = {ZEBRA_ROUTE_BGP_DIRECT, 20, 4}, | |
103 | [ZEBRA_ROUTE_BGP_DIRECT_EXT] = {ZEBRA_ROUTE_BGP_DIRECT_EXT, 20, 4}, | |
104 | [ZEBRA_ROUTE_BABEL] = {ZEBRA_ROUTE_BABEL, 100, 3}, | |
105 | [ZEBRA_ROUTE_SHARP] = {ZEBRA_ROUTE_SHARP, 150, 5}, | |
106 | [ZEBRA_ROUTE_PBR] = {ZEBRA_ROUTE_PBR, 200, 5}, | |
107 | [ZEBRA_ROUTE_BFD] = {ZEBRA_ROUTE_BFD, 255, 5}, | |
108 | [ZEBRA_ROUTE_OPENFABRIC] = {ZEBRA_ROUTE_OPENFABRIC, 115, 3}, | |
109 | [ZEBRA_ROUTE_VRRP] = {ZEBRA_ROUTE_VRRP, 255, 5} | |
d6abd8b0 | 110 | /* Any new route type added to zebra, should be mirrored here */ |
c710b277 | 111 | |
d62a17ae | 112 | /* no entry/default: 150 */ |
718e3744 | 113 | }; |
6b0655a2 | 114 | |
07ef3e34 | 115 | static void PRINTFRR(5, 6) |
d62a17ae | 116 | _rnode_zlog(const char *_func, vrf_id_t vrf_id, struct route_node *rn, |
117 | int priority, const char *msgfmt, ...) | |
2263a412 | 118 | { |
d62a17ae | 119 | char buf[SRCDEST2STR_BUFFER + sizeof(" (MRIB)")]; |
120 | char msgbuf[512]; | |
121 | va_list ap; | |
2263a412 | 122 | |
d62a17ae | 123 | va_start(ap, msgfmt); |
124 | vsnprintf(msgbuf, sizeof(msgbuf), msgfmt, ap); | |
125 | va_end(ap); | |
2263a412 | 126 | |
d62a17ae | 127 | if (rn) { |
128 | rib_table_info_t *info = srcdest_rnode_table_info(rn); | |
129 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
cb653491 | 130 | |
d62a17ae | 131 | if (info->safi == SAFI_MULTICAST) |
eab4a5c2 | 132 | strlcat(buf, " (MRIB)", sizeof(buf)); |
d62a17ae | 133 | } else { |
134 | snprintf(buf, sizeof(buf), "{(route_node *) NULL}"); | |
135 | } | |
2263a412 | 136 | |
d62a17ae | 137 | zlog(priority, "%s: %d:%s: %s", _func, vrf_id, buf, msgbuf); |
2263a412 DL |
138 | } |
139 | ||
d62a17ae | 140 | #define rnode_debug(node, vrf_id, ...) \ |
2263a412 | 141 | _rnode_zlog(__func__, vrf_id, node, LOG_DEBUG, __VA_ARGS__) |
d62a17ae | 142 | #define rnode_info(node, ...) \ |
2263a412 DL |
143 | _rnode_zlog(__func__, vrf_id, node, LOG_INFO, __VA_ARGS__) |
144 | ||
fd289fc8 | 145 | uint8_t route_distance(int type) |
40c7bdb0 | 146 | { |
fd289fc8 | 147 | uint8_t distance; |
40c7bdb0 | 148 | |
d62a17ae | 149 | if ((unsigned)type >= array_size(route_info)) |
150 | distance = 150; | |
151 | else | |
152 | distance = route_info[type].distance; | |
40c7bdb0 | 153 | |
d62a17ae | 154 | return distance; |
40c7bdb0 | 155 | } |
156 | ||
d7c0a89a | 157 | int is_zebra_valid_kernel_table(uint32_t table_id) |
7a4bb9c5 | 158 | { |
8f500a1c | 159 | #ifdef linux |
d62a17ae | 160 | if ((table_id == RT_TABLE_UNSPEC) || (table_id == RT_TABLE_LOCAL) |
161 | || (table_id == RT_TABLE_COMPAT)) | |
162 | return 0; | |
8f500a1c RW |
163 | #endif |
164 | ||
d62a17ae | 165 | return 1; |
7a4bb9c5 DS |
166 | } |
167 | ||
d7c0a89a | 168 | int is_zebra_main_routing_table(uint32_t table_id) |
7a4bb9c5 | 169 | { |
c447ad08 | 170 | if (table_id == RT_TABLE_MAIN) |
d62a17ae | 171 | return 1; |
172 | return 0; | |
7a4bb9c5 DS |
173 | } |
174 | ||
86391e56 | 175 | int zebra_check_addr(const struct prefix *p) |
0aabccc0 | 176 | { |
d62a17ae | 177 | if (p->family == AF_INET) { |
d7c0a89a | 178 | uint32_t addr; |
0aabccc0 | 179 | |
d62a17ae | 180 | addr = p->u.prefix4.s_addr; |
181 | addr = ntohl(addr); | |
0aabccc0 | 182 | |
d62a17ae | 183 | if (IPV4_NET127(addr) || IN_CLASSD(addr) |
184 | || IPV4_LINKLOCAL(addr)) | |
185 | return 0; | |
186 | } | |
187 | if (p->family == AF_INET6) { | |
188 | if (IN6_IS_ADDR_LOOPBACK(&p->u.prefix6)) | |
189 | return 0; | |
190 | if (IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
191 | return 0; | |
192 | } | |
193 | return 1; | |
0aabccc0 DD |
194 | } |
195 | ||
6e26278c DS |
196 | /** |
197 | * copy_nexthop - copy a nexthop to the rib structure. | |
198 | */ | |
d62a17ae | 199 | void route_entry_copy_nexthops(struct route_entry *re, struct nexthop *nh) |
6e26278c | 200 | { |
c415d895 MS |
201 | assert(!re->nhe->nhg.nexthop); |
202 | copy_nexthops(&re->nhe->nhg.nexthop, nh, NULL); | |
718e3744 | 203 | } |
204 | ||
5463ce26 MS |
205 | static void route_entry_attach_ref(struct route_entry *re, |
206 | struct nhg_hash_entry *new) | |
718e3744 | 207 | { |
0eb97b86 | 208 | re->nhe = new; |
5463ce26 | 209 | re->nhe_id = new->id; |
718e3744 | 210 | |
5463ce26 | 211 | zebra_nhg_increment_ref(new); |
718e3744 | 212 | } |
213 | ||
5463ce26 | 214 | int route_entry_update_nhe(struct route_entry *re, struct nhg_hash_entry *new) |
718e3744 | 215 | { |
377e29f7 | 216 | struct nhg_hash_entry *old; |
5463ce26 | 217 | int ret = 0; |
718e3744 | 218 | |
5463ce26 | 219 | if (new == NULL) { |
c415d895 MS |
220 | if (re->nhe) |
221 | zebra_nhg_decrement_ref(re->nhe); | |
222 | re->nhe = NULL; | |
5463ce26 MS |
223 | goto done; |
224 | } | |
718e3744 | 225 | |
377e29f7 | 226 | if ((re->nhe_id != 0) && (re->nhe_id != new->id)) { |
c415d895 | 227 | old = re->nhe; |
718e3744 | 228 | |
5463ce26 | 229 | route_entry_attach_ref(re, new); |
718e3744 | 230 | |
5463ce26 MS |
231 | if (old) |
232 | zebra_nhg_decrement_ref(old); | |
84a89a8d | 233 | } else if (!re->nhe) |
5463ce26 MS |
234 | /* This is the first time it's being attached */ |
235 | route_entry_attach_ref(re, new); | |
595db7f1 | 236 | |
5463ce26 MS |
237 | done: |
238 | return ret; | |
595db7f1 | 239 | } |
240 | ||
d62a17ae | 241 | struct route_entry *rib_match(afi_t afi, safi_t safi, vrf_id_t vrf_id, |
242 | union g_addr *addr, struct route_node **rn_out) | |
243 | { | |
244 | struct prefix p; | |
245 | struct route_table *table; | |
246 | struct route_node *rn; | |
5f7a4718 | 247 | struct route_entry *match = NULL; |
d62a17ae | 248 | |
249 | /* Lookup table. */ | |
250 | table = zebra_vrf_table(afi, safi, vrf_id); | |
251 | if (!table) | |
252 | return 0; | |
253 | ||
254 | memset(&p, 0, sizeof(struct prefix)); | |
255 | p.family = afi; | |
256 | if (afi == AFI_IP) { | |
257 | p.u.prefix4 = addr->ipv4; | |
258 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
259 | } else { | |
260 | p.u.prefix6 = addr->ipv6; | |
261 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
262 | } | |
718e3744 | 263 | |
c4efd0f4 | 264 | rn = route_node_match(table, &p); |
718e3744 | 265 | |
d62a17ae | 266 | while (rn) { |
5f7a4718 DS |
267 | rib_dest_t *dest; |
268 | ||
d62a17ae | 269 | route_unlock_node(rn); |
718e3744 | 270 | |
5f7a4718 | 271 | dest = rib_dest_from_rnode(rn); |
996c9314 LB |
272 | if (dest && dest->selected_fib |
273 | && !CHECK_FLAG(dest->selected_fib->status, | |
274 | ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 275 | match = dest->selected_fib; |
718e3744 | 276 | |
d62a17ae | 277 | /* If there is no selected route or matched route is EGP, go up |
278 | tree. */ | |
279 | if (!match) { | |
280 | do { | |
281 | rn = rn->parent; | |
282 | } while (rn && rn->info == NULL); | |
283 | if (rn) | |
284 | route_lock_node(rn); | |
285 | } else { | |
286 | if (match->type != ZEBRA_ROUTE_CONNECT) { | |
677c1dd5 DS |
287 | if (!CHECK_FLAG(match->status, |
288 | ROUTE_ENTRY_INSTALLED)) | |
d62a17ae | 289 | return NULL; |
290 | } | |
291 | ||
292 | if (rn_out) | |
293 | *rn_out = rn; | |
294 | return match; | |
295 | } | |
16814f96 | 296 | } |
d62a17ae | 297 | return NULL; |
298 | } | |
299 | ||
300 | struct route_entry *rib_match_ipv4_multicast(vrf_id_t vrf_id, | |
301 | struct in_addr addr, | |
302 | struct route_node **rn_out) | |
303 | { | |
304 | struct route_entry *re = NULL, *mre = NULL, *ure = NULL; | |
305 | struct route_node *m_rn = NULL, *u_rn = NULL; | |
306 | union g_addr gaddr = {.ipv4 = addr}; | |
307 | ||
526052fb | 308 | switch (zrouter.ipv4_multicast_mode) { |
d62a17ae | 309 | case MCAST_MRIB_ONLY: |
310 | return rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
311 | rn_out); | |
312 | case MCAST_URIB_ONLY: | |
313 | return rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, rn_out); | |
314 | case MCAST_NO_CONFIG: | |
315 | case MCAST_MIX_MRIB_FIRST: | |
316 | re = mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
317 | &m_rn); | |
318 | if (!mre) | |
319 | re = ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, | |
320 | &gaddr, &u_rn); | |
321 | break; | |
322 | case MCAST_MIX_DISTANCE: | |
323 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
324 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
325 | if (mre && ure) | |
326 | re = ure->distance < mre->distance ? ure : mre; | |
327 | else if (mre) | |
328 | re = mre; | |
329 | else if (ure) | |
330 | re = ure; | |
331 | break; | |
332 | case MCAST_MIX_PFXLEN: | |
333 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
334 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
335 | if (mre && ure) | |
336 | re = u_rn->p.prefixlen > m_rn->p.prefixlen ? ure : mre; | |
337 | else if (mre) | |
338 | re = mre; | |
339 | else if (ure) | |
340 | re = ure; | |
341 | break; | |
718e3744 | 342 | } |
33550aa8 | 343 | |
d62a17ae | 344 | if (rn_out) |
345 | *rn_out = (re == mre) ? m_rn : u_rn; | |
718e3744 | 346 | |
d62a17ae | 347 | if (IS_ZEBRA_DEBUG_RIB) { |
348 | char buf[BUFSIZ]; | |
349 | inet_ntop(AF_INET, &addr, buf, BUFSIZ); | |
4623d897 | 350 | |
bd47f3a3 JU |
351 | zlog_debug("%s: %s: vrf: %s(%u) found %s, using %s", __func__, |
352 | buf, vrf_id_to_name(vrf_id), vrf_id, | |
d62a17ae | 353 | mre ? (ure ? "MRIB+URIB" : "MRIB") |
354 | : ure ? "URIB" : "nothing", | |
355 | re == ure ? "URIB" : re == mre ? "MRIB" : "none"); | |
356 | } | |
357 | return re; | |
4623d897 DL |
358 | } |
359 | ||
d62a17ae | 360 | struct route_entry *rib_lookup_ipv4(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 361 | { |
d62a17ae | 362 | struct route_table *table; |
363 | struct route_node *rn; | |
5f7a4718 | 364 | struct route_entry *match = NULL; |
5f7a4718 | 365 | rib_dest_t *dest; |
718e3744 | 366 | |
d62a17ae | 367 | /* Lookup table. */ |
368 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
369 | if (!table) | |
370 | return 0; | |
718e3744 | 371 | |
d62a17ae | 372 | rn = route_node_lookup(table, (struct prefix *)p); |
718e3744 | 373 | |
d62a17ae | 374 | /* No route for this prefix. */ |
375 | if (!rn) | |
376 | return NULL; | |
718e3744 | 377 | |
d62a17ae | 378 | /* Unlock node. */ |
379 | route_unlock_node(rn); | |
5f7a4718 | 380 | dest = rib_dest_from_rnode(rn); |
718e3744 | 381 | |
996c9314 LB |
382 | if (dest && dest->selected_fib |
383 | && !CHECK_FLAG(dest->selected_fib->status, ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 384 | match = dest->selected_fib; |
718e3744 | 385 | |
d62a17ae | 386 | if (!match) |
387 | return NULL; | |
718e3744 | 388 | |
d62a17ae | 389 | if (match->type == ZEBRA_ROUTE_CONNECT) |
390 | return match; | |
f9e1b38e | 391 | |
677c1dd5 DS |
392 | if (CHECK_FLAG(match->status, ROUTE_ENTRY_INSTALLED)) |
393 | return match; | |
718e3744 | 394 | |
d62a17ae | 395 | return NULL; |
718e3744 | 396 | } |
397 | ||
a64448ba DS |
398 | /* |
399 | * Is this RIB labeled-unicast? It must be of type BGP and all paths | |
400 | * (nexthops) must have a label. | |
401 | */ | |
d62a17ae | 402 | int zebra_rib_labeled_unicast(struct route_entry *re) |
a64448ba | 403 | { |
d62a17ae | 404 | struct nexthop *nexthop = NULL; |
a64448ba | 405 | |
d62a17ae | 406 | if (re->type != ZEBRA_ROUTE_BGP) |
407 | return 0; | |
a64448ba | 408 | |
c415d895 | 409 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
d62a17ae | 410 | if (!nexthop->nh_label || !nexthop->nh_label->num_labels) |
411 | return 0; | |
6b0655a2 | 412 | |
d62a17ae | 413 | return 1; |
a64448ba | 414 | } |
718e3744 | 415 | |
6ae24471 DS |
416 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
417 | * is only used for IPv4. | |
418 | */ | |
0c555cc6 DS |
419 | void rib_install_kernel(struct route_node *rn, struct route_entry *re, |
420 | struct route_entry *old) | |
718e3744 | 421 | { |
d62a17ae | 422 | struct nexthop *nexthop; |
423 | rib_table_info_t *info = srcdest_rnode_table_info(rn); | |
d62a17ae | 424 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
97f5b441 MS |
425 | const struct prefix *p, *src_p; |
426 | enum zebra_dplane_result ret; | |
427 | ||
428 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
718e3744 | 429 | |
d62a17ae | 430 | srcdest_rnode_prefixes(rn, &p, &src_p); |
416ec78d | 431 | |
d62a17ae | 432 | if (info->safi != SAFI_UNICAST) { |
c415d895 | 433 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
d62a17ae | 434 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 435 | return; |
d62a17ae | 436 | } |
718e3744 | 437 | |
9ef49038 | 438 | |
8dfbc657 SW |
439 | /* |
440 | * Install the resolved nexthop object first. | |
441 | */ | |
c415d895 | 442 | zebra_nhg_install_kernel(re->nhe); |
8dfbc657 | 443 | |
2063a814 DS |
444 | /* |
445 | * If this is a replace to a new RE let the originator of the RE | |
446 | * know that they've lost | |
447 | */ | |
9a9f8926 | 448 | if (old && (old != re) && (old->type != re->type)) |
28610f7e | 449 | zsend_route_notify_owner(old, p, ZAPI_ROUTE_BETTER_ADMIN_WON); |
25b9cb0c | 450 | |
97f5b441 MS |
451 | /* Update fib selection */ |
452 | dest->selected_fib = re; | |
453 | ||
d62a17ae | 454 | /* |
455 | * Make sure we update the FPM any time we send new information to | |
456 | * the kernel. | |
457 | */ | |
458 | hook_call(rib_update, rn, "installing in kernel"); | |
97f5b441 MS |
459 | |
460 | /* Send add or update */ | |
8263d1d0 | 461 | if (old) |
97f5b441 | 462 | ret = dplane_route_update(rn, re, old); |
5709131c | 463 | else |
97f5b441 | 464 | ret = dplane_route_add(rn, re); |
97f5b441 MS |
465 | |
466 | switch (ret) { | |
ea1c14f6 | 467 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
60f98b23 | 468 | SET_FLAG(re->status, ROUTE_ENTRY_QUEUED); |
efe6c026 MS |
469 | |
470 | if (old) { | |
60f98b23 | 471 | SET_FLAG(old->status, ROUTE_ENTRY_QUEUED); |
efe6c026 MS |
472 | |
473 | /* Free old FIB nexthop group */ | |
474 | if (old->fib_ng.nexthop) { | |
475 | nexthops_free(old->fib_ng.nexthop); | |
476 | old->fib_ng.nexthop = NULL; | |
477 | } | |
efe6c026 MS |
478 | } |
479 | ||
97f5b441 MS |
480 | if (zvrf) |
481 | zvrf->installs_queued++; | |
1e885672 | 482 | break; |
ea1c14f6 | 483 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
97f5b441 MS |
484 | { |
485 | char str[SRCDEST2STR_BUFFER]; | |
486 | ||
487 | srcdest_rnode2str(rn, str, sizeof(str)); | |
488 | flog_err(EC_ZEBRA_DP_INSTALL_FAIL, | |
489 | "%u:%s: Failed to enqueue dataplane install", | |
490 | re->vrf_id, str); | |
1e885672 | 491 | break; |
97f5b441 | 492 | } |
ea1c14f6 | 493 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
97f5b441 MS |
494 | if (zvrf) |
495 | zvrf->installs++; | |
1e885672 DS |
496 | break; |
497 | } | |
d62a17ae | 498 | |
0c555cc6 | 499 | return; |
718e3744 | 500 | } |
501 | ||
502 | /* Uninstall the route from kernel. */ | |
0c555cc6 | 503 | void rib_uninstall_kernel(struct route_node *rn, struct route_entry *re) |
718e3744 | 504 | { |
d62a17ae | 505 | struct nexthop *nexthop; |
506 | rib_table_info_t *info = srcdest_rnode_table_info(rn); | |
d62a17ae | 507 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
05737783 | 508 | |
d62a17ae | 509 | if (info->safi != SAFI_UNICAST) { |
677c1dd5 | 510 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
c415d895 | 511 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
d6792f9d | 512 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 513 | return; |
d62a17ae | 514 | } |
416ec78d | 515 | |
d62a17ae | 516 | /* |
517 | * Make sure we update the FPM any time we send new information to | |
97f5b441 | 518 | * the dataplane. |
d62a17ae | 519 | */ |
520 | hook_call(rib_update, rn, "uninstalling from kernel"); | |
97f5b441 MS |
521 | |
522 | switch (dplane_route_delete(rn, re)) { | |
ea1c14f6 | 523 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
97f5b441 MS |
524 | if (zvrf) |
525 | zvrf->removals_queued++; | |
1e885672 | 526 | break; |
ea1c14f6 | 527 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
97f5b441 MS |
528 | { |
529 | char str[SRCDEST2STR_BUFFER]; | |
530 | ||
531 | srcdest_rnode2str(rn, str, sizeof(str)); | |
532 | flog_err(EC_ZEBRA_DP_INSTALL_FAIL, | |
533 | "%u:%s: Failed to enqueue dataplane uninstall", | |
534 | re->vrf_id, str); | |
1e885672 | 535 | break; |
97f5b441 | 536 | } |
ea1c14f6 | 537 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
1e885672 DS |
538 | if (zvrf) |
539 | zvrf->removals++; | |
540 | break; | |
541 | } | |
718e3744 | 542 | |
0c555cc6 | 543 | return; |
718e3744 | 544 | } |
545 | ||
546 | /* Uninstall the route from kernel. */ | |
d62a17ae | 547 | static void rib_uninstall(struct route_node *rn, struct route_entry *re) |
718e3744 | 548 | { |
d62a17ae | 549 | rib_table_info_t *info = srcdest_rnode_table_info(rn); |
5f7a4718 | 550 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
97f5b441 | 551 | struct nexthop *nexthop; |
416ec78d | 552 | |
5f7a4718 | 553 | if (dest && dest->selected_fib == re) { |
d62a17ae | 554 | if (info->safi == SAFI_UNICAST) |
555 | hook_call(rib_update, rn, "rib_uninstall"); | |
5adc2528 | 556 | |
d62a17ae | 557 | /* If labeled-unicast route, uninstall transit LSP. */ |
558 | if (zebra_rib_labeled_unicast(re)) | |
559 | zebra_mpls_lsp_uninstall(info->zvrf, rn, re); | |
7cdb1a84 | 560 | |
3cdba47a | 561 | rib_uninstall_kernel(rn, re); |
97f5b441 MS |
562 | |
563 | dest->selected_fib = NULL; | |
564 | ||
efe6c026 MS |
565 | /* Free FIB nexthop group, if present */ |
566 | if (re->fib_ng.nexthop) { | |
567 | nexthops_free(re->fib_ng.nexthop); | |
568 | re->fib_ng.nexthop = NULL; | |
569 | } | |
570 | ||
c415d895 | 571 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
97f5b441 | 572 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
d62a17ae | 573 | } |
446bb95e | 574 | |
d62a17ae | 575 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { |
86391e56 MS |
576 | const struct prefix *p, *src_p; |
577 | ||
d62a17ae | 578 | srcdest_rnode_prefixes(rn, &p, &src_p); |
05737783 | 579 | |
40f321c0 | 580 | redistribute_delete(p, src_p, re, NULL); |
d62a17ae | 581 | UNSET_FLAG(re->flags, ZEBRA_FLAG_SELECTED); |
582 | } | |
718e3744 | 583 | } |
584 | ||
9fd92e3c AS |
585 | /* |
586 | * rib_can_delete_dest | |
587 | * | |
2951a7a4 | 588 | * Returns true if the given dest can be deleted from the table. |
9fd92e3c | 589 | */ |
d62a17ae | 590 | static int rib_can_delete_dest(rib_dest_t *dest) |
9fd92e3c | 591 | { |
045207e2 | 592 | if (re_list_first(&dest->routes)) { |
d62a17ae | 593 | return 0; |
594 | } | |
9fd92e3c | 595 | |
c86ba6c2 DS |
596 | /* |
597 | * Unresolved rnh's are stored on the default route's list | |
598 | * | |
599 | * dest->rnode can also be the source prefix node in an | |
600 | * ipv6 sourcedest table. Fortunately the prefix of a | |
601 | * source prefix node can never be the default prefix. | |
602 | */ | |
603 | if (is_default_prefix(&dest->rnode->p)) | |
604 | return 0; | |
605 | ||
d62a17ae | 606 | /* |
607 | * Don't delete the dest if we have to update the FPM about this | |
608 | * prefix. | |
609 | */ | |
610 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_FPM) | |
611 | || CHECK_FLAG(dest->flags, RIB_DEST_SENT_TO_FPM)) | |
612 | return 0; | |
5adc2528 | 613 | |
d62a17ae | 614 | return 1; |
9fd92e3c AS |
615 | } |
616 | ||
699dae23 DS |
617 | void zebra_rib_evaluate_rn_nexthops(struct route_node *rn, uint32_t seq) |
618 | { | |
619 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
699dae23 DS |
620 | struct rnh *rnh; |
621 | ||
622 | /* | |
50872b08 | 623 | * We are storing the rnh's associated withb |
699dae23 DS |
624 | * the tracked nexthop as a list of the rn's. |
625 | * Unresolved rnh's are placed at the top | |
626 | * of the tree list.( 0.0.0.0/0 for v4 and 0::0/0 for v6 ) | |
627 | * As such for each rn we need to walk up the tree | |
628 | * and see if any rnh's need to see if they | |
629 | * would match a more specific route | |
630 | */ | |
631 | while (rn) { | |
50872b08 DS |
632 | if (IS_ZEBRA_DEBUG_NHT_DETAILED) { |
633 | char buf[PREFIX_STRLEN]; | |
634 | ||
15569c58 DA |
635 | zlog_debug( |
636 | "%s: %s Being examined for Nexthop Tracking Count: %zd", | |
637 | __func__, | |
638 | srcdest_rnode2str(rn, buf, sizeof(buf)), | |
639 | dest ? rnh_list_count(&dest->nht) : 0); | |
50872b08 | 640 | } |
699dae23 DS |
641 | if (!dest) { |
642 | rn = rn->parent; | |
643 | if (rn) | |
644 | dest = rib_dest_from_rnode(rn); | |
645 | continue; | |
646 | } | |
647 | /* | |
648 | * If we have any rnh's stored in the nht list | |
649 | * then we know that this route node was used for | |
650 | * nht resolution and as such we need to call the | |
651 | * nexthop tracking evaluation code | |
652 | */ | |
739c9c90 | 653 | frr_each_safe(rnh_list, &dest->nht, rnh) { |
699dae23 DS |
654 | struct zebra_vrf *zvrf = |
655 | zebra_vrf_lookup_by_id(rnh->vrf_id); | |
656 | struct prefix *p = &rnh->node->p; | |
657 | ||
50872b08 | 658 | if (IS_ZEBRA_DEBUG_NHT_DETAILED) { |
699dae23 DS |
659 | char buf1[PREFIX_STRLEN]; |
660 | char buf2[PREFIX_STRLEN]; | |
661 | ||
bd47f3a3 JU |
662 | zlog_debug( |
663 | "%s(%u):%s has Nexthop(%s) Type: %s depending on it, evaluating %u:%u", | |
664 | zvrf_name(zvrf), zvrf_id(zvrf), | |
665 | srcdest_rnode2str(rn, buf1, | |
666 | sizeof(buf1)), | |
667 | prefix2str(p, buf2, sizeof(buf2)), | |
668 | rnh_type2str(rnh->type), seq, | |
669 | rnh->seqno); | |
699dae23 DS |
670 | } |
671 | ||
672 | /* | |
673 | * If we have evaluated this node on this pass | |
674 | * already, due to following the tree up | |
675 | * then we know that we can move onto the next | |
676 | * rnh to process. | |
677 | * | |
678 | * Additionally we call zebra_evaluate_rnh | |
679 | * when we gc the dest. In this case we know | |
680 | * that there must be no other re's where | |
681 | * we were originally as such we know that | |
682 | * that sequence number is ok to respect. | |
683 | */ | |
50872b08 DS |
684 | if (rnh->seqno == seq) { |
685 | if (IS_ZEBRA_DEBUG_NHT_DETAILED) | |
686 | zlog_debug( | |
687 | "\tNode processed and moved already"); | |
699dae23 | 688 | continue; |
50872b08 | 689 | } |
699dae23 DS |
690 | |
691 | rnh->seqno = seq; | |
692 | zebra_evaluate_rnh(zvrf, family2afi(p->family), 0, | |
693 | rnh->type, p); | |
694 | } | |
695 | ||
696 | rn = rn->parent; | |
697 | if (rn) | |
698 | dest = rib_dest_from_rnode(rn); | |
699 | } | |
700 | } | |
701 | ||
9fd92e3c AS |
702 | /* |
703 | * rib_gc_dest | |
704 | * | |
705 | * Garbage collect the rib dest corresponding to the given route node | |
706 | * if appropriate. | |
707 | * | |
2951a7a4 | 708 | * Returns true if the dest was deleted, false otherwise. |
9fd92e3c | 709 | */ |
d62a17ae | 710 | int rib_gc_dest(struct route_node *rn) |
9fd92e3c | 711 | { |
d62a17ae | 712 | rib_dest_t *dest; |
9fd92e3c | 713 | |
d62a17ae | 714 | dest = rib_dest_from_rnode(rn); |
715 | if (!dest) | |
716 | return 0; | |
9fd92e3c | 717 | |
d62a17ae | 718 | if (!rib_can_delete_dest(dest)) |
719 | return 0; | |
9fd92e3c | 720 | |
c9abf558 DS |
721 | if (IS_ZEBRA_DEBUG_RIB) { |
722 | struct zebra_vrf *zvrf; | |
723 | ||
724 | zvrf = rib_dest_vrf(dest); | |
d62a17ae | 725 | rnode_debug(rn, zvrf_id(zvrf), "removing dest from table"); |
c9abf558 | 726 | } |
9fd92e3c | 727 | |
699dae23 DS |
728 | zebra_rib_evaluate_rn_nexthops(rn, zebra_router_get_next_sequence()); |
729 | ||
d62a17ae | 730 | dest->rnode = NULL; |
aa57abfb | 731 | rnh_list_fini(&dest->nht); |
d62a17ae | 732 | XFREE(MTYPE_RIB_DEST, dest); |
733 | rn->info = NULL; | |
9fd92e3c | 734 | |
d62a17ae | 735 | /* |
736 | * Release the one reference that we keep on the route node. | |
737 | */ | |
738 | route_unlock_node(rn); | |
739 | return 1; | |
9fd92e3c AS |
740 | } |
741 | ||
d62a17ae | 742 | static void rib_process_add_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
743 | struct route_entry *new) | |
3e5c6e00 | 744 | { |
d62a17ae | 745 | hook_call(rib_update, rn, "new route selected"); |
3e5c6e00 | 746 | |
d62a17ae | 747 | /* Update real nexthop. This may actually determine if nexthop is active |
748 | * or not. */ | |
c415d895 | 749 | if (!nexthop_group_active_nexthop_num(&(new->nhe->nhg))) { |
d62a17ae | 750 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
751 | return; | |
752 | } | |
3e5c6e00 | 753 | |
d62a17ae | 754 | if (IS_ZEBRA_DEBUG_RIB) { |
755 | char buf[SRCDEST2STR_BUFFER]; | |
756 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bd47f3a3 JU |
757 | zlog_debug("%s(%u):%s: Adding route rn %p, re %p (%s)", |
758 | zvrf_name(zvrf), zvrf_id(zvrf), buf, rn, new, | |
2da33d6b | 759 | zebra_route_string(new->type)); |
d62a17ae | 760 | } |
3e5c6e00 | 761 | |
d62a17ae | 762 | /* If labeled-unicast route, install transit LSP. */ |
763 | if (zebra_rib_labeled_unicast(new)) | |
764 | zebra_mpls_lsp_install(zvrf, rn, new); | |
a64448ba | 765 | |
3cdba47a | 766 | rib_install_kernel(rn, new, NULL); |
3e5c6e00 | 767 | |
d62a17ae | 768 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
3e5c6e00 | 769 | } |
770 | ||
d62a17ae | 771 | static void rib_process_del_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
772 | struct route_entry *old) | |
3e5c6e00 | 773 | { |
d62a17ae | 774 | hook_call(rib_update, rn, "removing existing route"); |
3e5c6e00 | 775 | |
d62a17ae | 776 | /* Uninstall from kernel. */ |
777 | if (IS_ZEBRA_DEBUG_RIB) { | |
778 | char buf[SRCDEST2STR_BUFFER]; | |
779 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bd47f3a3 JU |
780 | zlog_debug("%s(%u):%s: Deleting route rn %p, re %p (%s)", |
781 | zvrf_name(zvrf), zvrf_id(zvrf), buf, rn, old, | |
2da33d6b | 782 | zebra_route_string(old->type)); |
d62a17ae | 783 | } |
3e5c6e00 | 784 | |
d62a17ae | 785 | /* If labeled-unicast route, uninstall transit LSP. */ |
786 | if (zebra_rib_labeled_unicast(old)) | |
787 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
788 | ||
3cdba47a | 789 | rib_uninstall_kernel(rn, old); |
d62a17ae | 790 | |
791 | /* Update nexthop for route, reset changed flag. */ | |
ef57f35f DL |
792 | /* Note: this code also handles the Linux case when an interface goes |
793 | * down, causing the kernel to delete routes without sending DELROUTE | |
794 | * notifications | |
795 | */ | |
6883bf8d | 796 | if (RIB_KERNEL_ROUTE(old)) |
212df1de PG |
797 | SET_FLAG(old->status, ROUTE_ENTRY_REMOVED); |
798 | else | |
799 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); | |
d62a17ae | 800 | } |
801 | ||
802 | static void rib_process_update_fib(struct zebra_vrf *zvrf, | |
803 | struct route_node *rn, | |
804 | struct route_entry *old, | |
805 | struct route_entry *new) | |
806 | { | |
d62a17ae | 807 | int nh_active = 0; |
d62a17ae | 808 | |
809 | /* | |
810 | * We have to install or update if a new route has been selected or | |
811 | * something has changed. | |
812 | */ | |
813 | if (new != old || CHECK_FLAG(new->status, ROUTE_ENTRY_CHANGED)) { | |
814 | hook_call(rib_update, rn, "updating existing route"); | |
815 | ||
816 | /* Update the nexthop; we could determine here that nexthop is | |
817 | * inactive. */ | |
c415d895 | 818 | if (nexthop_group_active_nexthop_num(&(new->nhe->nhg))) |
d62a17ae | 819 | nh_active = 1; |
820 | ||
821 | /* If nexthop is active, install the selected route, if | |
822 | * appropriate. If | |
823 | * the install succeeds, cleanup flags for prior route, if | |
824 | * different from | |
825 | * newly selected. | |
826 | */ | |
827 | if (nh_active) { | |
828 | if (IS_ZEBRA_DEBUG_RIB) { | |
829 | char buf[SRCDEST2STR_BUFFER]; | |
830 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
831 | if (new != old) | |
832 | zlog_debug( | |
bd47f3a3 JU |
833 | "%s(%u):%s: Updating route rn %p, re %p (%s) old %p (%s)", |
834 | zvrf_name(zvrf), zvrf_id(zvrf), | |
835 | buf, rn, new, | |
2da33d6b DS |
836 | zebra_route_string(new->type), |
837 | old, | |
838 | zebra_route_string(old->type)); | |
d62a17ae | 839 | else |
840 | zlog_debug( | |
bd47f3a3 JU |
841 | "%s(%u):%s: Updating route rn %p, re %p (%s)", |
842 | zvrf_name(zvrf), zvrf_id(zvrf), | |
843 | buf, rn, new, | |
2da33d6b | 844 | zebra_route_string(new->type)); |
d62a17ae | 845 | } |
846 | ||
847 | /* If labeled-unicast route, uninstall transit LSP. */ | |
848 | if (zebra_rib_labeled_unicast(old)) | |
849 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
850 | ||
3cdba47a DS |
851 | /* |
852 | * Non-system route should be installed. | |
853 | * If labeled-unicast route, install transit | |
854 | * LSP. | |
855 | */ | |
856 | if (zebra_rib_labeled_unicast(new)) | |
857 | zebra_mpls_lsp_install(zvrf, rn, new); | |
d62a17ae | 858 | |
3cdba47a | 859 | rib_install_kernel(rn, new, old); |
d62a17ae | 860 | } |
a64448ba | 861 | |
d62a17ae | 862 | /* |
863 | * If nexthop for selected route is not active or install | |
864 | * failed, we | |
865 | * may need to uninstall and delete for redistribution. | |
866 | */ | |
ed216282 | 867 | if (!nh_active) { |
d62a17ae | 868 | if (IS_ZEBRA_DEBUG_RIB) { |
869 | char buf[SRCDEST2STR_BUFFER]; | |
870 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
871 | if (new != old) | |
872 | zlog_debug( | |
bd47f3a3 JU |
873 | "%s(%u):%s: Deleting route rn %p, re %p (%s) old %p (%s) - nexthop inactive", |
874 | zvrf_name(zvrf), zvrf_id(zvrf), | |
875 | buf, rn, new, | |
2da33d6b DS |
876 | zebra_route_string(new->type), |
877 | old, | |
878 | zebra_route_string(old->type)); | |
d62a17ae | 879 | else |
880 | zlog_debug( | |
bd47f3a3 JU |
881 | "%s(%u):%s: Deleting route rn %p, re %p (%s) - nexthop inactive", |
882 | zvrf_name(zvrf), zvrf_id(zvrf), | |
883 | buf, rn, new, | |
2da33d6b | 884 | zebra_route_string(new->type)); |
d62a17ae | 885 | } |
886 | ||
887 | /* If labeled-unicast route, uninstall transit LSP. */ | |
888 | if (zebra_rib_labeled_unicast(old)) | |
889 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
890 | ||
3cdba47a | 891 | rib_uninstall_kernel(rn, old); |
d62a17ae | 892 | } |
893 | } else { | |
894 | /* | |
895 | * Same route selected; check if in the FIB and if not, | |
3cdba47a DS |
896 | * re-install. This is housekeeping code to deal with |
897 | * race conditions in kernel with linux netlink reporting | |
898 | * interface up before IPv4 or IPv6 protocol is ready | |
d62a17ae | 899 | * to add routes. |
900 | */ | |
3cdba47a DS |
901 | if (!CHECK_FLAG(new->status, ROUTE_ENTRY_INSTALLED) || |
902 | RIB_SYSTEM_ROUTE(new)) | |
677c1dd5 | 903 | rib_install_kernel(rn, new, NULL); |
d62a17ae | 904 | } |
905 | ||
906 | /* Update prior route. */ | |
6883bf8d | 907 | if (new != old) |
d62a17ae | 908 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); |
3e5c6e00 | 909 | |
d62a17ae | 910 | /* Clear changed flag. */ |
911 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); | |
3e5c6e00 | 912 | } |
913 | ||
d62a17ae | 914 | /* Check if 'alternate' RIB entry is better than 'current'. */ |
915 | static struct route_entry *rib_choose_best(struct route_entry *current, | |
916 | struct route_entry *alternate) | |
917 | { | |
918 | if (current == NULL) | |
919 | return alternate; | |
920 | ||
921 | /* filter route selection in following order: | |
922 | * - connected beats other types | |
fec4ca19 | 923 | * - if both connected, loopback or vrf wins |
d62a17ae | 924 | * - lower distance beats higher |
925 | * - lower metric beats higher for equal distance | |
926 | * - last, hence oldest, route wins tie break. | |
927 | */ | |
928 | ||
fec4ca19 DS |
929 | /* Connected routes. Check to see if either are a vrf |
930 | * or loopback interface. If not, pick the last connected | |
d62a17ae | 931 | * route of the set of lowest metric connected routes. |
932 | */ | |
933 | if (alternate->type == ZEBRA_ROUTE_CONNECT) { | |
fec4ca19 DS |
934 | if (current->type != ZEBRA_ROUTE_CONNECT) |
935 | return alternate; | |
936 | ||
937 | /* both are connected. are either loop or vrf? */ | |
938 | struct nexthop *nexthop = NULL; | |
939 | ||
c415d895 | 940 | for (ALL_NEXTHOPS(alternate->nhe->nhg, nexthop)) { |
873fde8c | 941 | struct interface *ifp = if_lookup_by_index( |
942 | nexthop->ifindex, alternate->vrf_id); | |
943 | ||
944 | if (ifp && if_is_loopback_or_vrf(ifp)) | |
fec4ca19 DS |
945 | return alternate; |
946 | } | |
947 | ||
c415d895 | 948 | for (ALL_NEXTHOPS(current->nhe->nhg, nexthop)) { |
873fde8c | 949 | struct interface *ifp = if_lookup_by_index( |
950 | nexthop->ifindex, current->vrf_id); | |
951 | ||
952 | if (ifp && if_is_loopback_or_vrf(ifp)) | |
fec4ca19 DS |
953 | return current; |
954 | } | |
955 | ||
956 | /* Neither are loop or vrf so pick best metric */ | |
957 | if (alternate->metric <= current->metric) | |
d62a17ae | 958 | return alternate; |
959 | ||
960 | return current; | |
961 | } | |
3e5c6e00 | 962 | |
d62a17ae | 963 | if (current->type == ZEBRA_ROUTE_CONNECT) |
964 | return current; | |
3e5c6e00 | 965 | |
d62a17ae | 966 | /* higher distance loses */ |
967 | if (alternate->distance < current->distance) | |
968 | return alternate; | |
969 | if (current->distance < alternate->distance) | |
970 | return current; | |
3e5c6e00 | 971 | |
d62a17ae | 972 | /* metric tie-breaks equal distance */ |
973 | if (alternate->metric <= current->metric) | |
974 | return alternate; | |
3e5c6e00 | 975 | |
d62a17ae | 976 | return current; |
3e5c6e00 | 977 | } |
978 | ||
e22e8001 SW |
979 | /* Core function for processing nexthop group contexts's off metaq */ |
980 | static void rib_nhg_process(struct nhg_ctx *ctx) | |
981 | { | |
982 | nhg_ctx_process(ctx); | |
983 | } | |
984 | ||
d62a17ae | 985 | /* Core function for processing routing information base. */ |
986 | static void rib_process(struct route_node *rn) | |
987 | { | |
988 | struct route_entry *re; | |
989 | struct route_entry *next; | |
990 | struct route_entry *old_selected = NULL; | |
991 | struct route_entry *new_selected = NULL; | |
992 | struct route_entry *old_fib = NULL; | |
993 | struct route_entry *new_fib = NULL; | |
994 | struct route_entry *best = NULL; | |
995 | char buf[SRCDEST2STR_BUFFER]; | |
996 | rib_dest_t *dest; | |
997 | struct zebra_vrf *zvrf = NULL; | |
bd47f3a3 | 998 | struct vrf *vrf; |
86391e56 MS |
999 | const struct prefix *p, *src_p; |
1000 | ||
d62a17ae | 1001 | srcdest_rnode_prefixes(rn, &p, &src_p); |
1002 | vrf_id_t vrf_id = VRF_UNKNOWN; | |
1003 | ||
1004 | assert(rn); | |
1005 | ||
1006 | dest = rib_dest_from_rnode(rn); | |
1007 | if (dest) { | |
1008 | zvrf = rib_dest_vrf(dest); | |
1009 | vrf_id = zvrf_id(zvrf); | |
1010 | } | |
bab85d4f | 1011 | |
bd47f3a3 JU |
1012 | vrf = vrf_lookup_by_id(vrf_id); |
1013 | ||
d62a17ae | 1014 | if (IS_ZEBRA_DEBUG_RIB) |
1015 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bab85d4f | 1016 | |
d62a17ae | 1017 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
bd47f3a3 JU |
1018 | zlog_debug("%s(%u):%s: Processing rn %p", VRF_LOGNAME(vrf), |
1019 | vrf_id, buf, rn); | |
bab85d4f | 1020 | |
607425e5 DS |
1021 | /* |
1022 | * we can have rn's that have a NULL info pointer | |
1023 | * (dest). As such let's not let the deref happen | |
1024 | * additionally we know RNODE_FOREACH_RE_SAFE | |
1025 | * will not iterate so we are ok. | |
1026 | */ | |
1027 | if (dest) | |
1028 | old_fib = dest->selected_fib; | |
5f7a4718 | 1029 | |
a2addae8 | 1030 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 1031 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1032 | zlog_debug( | |
bd47f3a3 JU |
1033 | "%s(%u):%s: Examine re %p (%s) status %x flags %x dist %d metric %d", |
1034 | VRF_LOGNAME(vrf), vrf_id, buf, re, | |
1035 | zebra_route_string(re->type), re->status, | |
1036 | re->flags, re->distance, re->metric); | |
d62a17ae | 1037 | |
d62a17ae | 1038 | /* Currently selected re. */ |
1039 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { | |
1040 | assert(old_selected == NULL); | |
1041 | old_selected = re; | |
1042 | } | |
bab85d4f | 1043 | |
d62a17ae | 1044 | /* Skip deleted entries from selection */ |
1045 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
1046 | continue; | |
1047 | ||
1048 | /* Skip unreachable nexthop. */ | |
1049 | /* This first call to nexthop_active_update is merely to | |
6883bf8d DS |
1050 | * determine if there's any change to nexthops associated |
1051 | * with this RIB entry. Now, rib_process() can be invoked due | |
1052 | * to an external event such as link down or due to | |
1053 | * next-hop-tracking evaluation. In the latter case, | |
d62a17ae | 1054 | * a decision has already been made that the NHs have changed. |
6883bf8d DS |
1055 | * So, no need to invoke a potentially expensive call again. |
1056 | * Further, since the change might be in a recursive NH which | |
1057 | * is not caught in the nexthop_active_update() code. Thus, we | |
1058 | * might miss changes to recursive NHs. | |
d62a17ae | 1059 | */ |
6883bf8d | 1060 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED) |
99eabcec | 1061 | && !nexthop_active_update(rn, re)) { |
d62a17ae | 1062 | if (re->type == ZEBRA_ROUTE_TABLE) { |
1063 | /* XXX: HERE BE DRAGONS!!!!! | |
1064 | * In all honesty, I have not yet figured out | |
6883bf8d DS |
1065 | * what this part does or why the |
1066 | * ROUTE_ENTRY_CHANGED test above is correct | |
d62a17ae | 1067 | * or why we need to delete a route here, and |
6883bf8d DS |
1068 | * also not whether this concerns both selected |
1069 | * and fib route, or only selected | |
1070 | * or only fib | |
1071 | * | |
1072 | * This entry was denied by the 'ip protocol | |
1073 | * table' route-map, we need to delete it */ | |
d62a17ae | 1074 | if (re != old_selected) { |
1075 | if (IS_ZEBRA_DEBUG_RIB) | |
1076 | zlog_debug( | |
bd47f3a3 | 1077 | "%s: %s(%u):%s: imported via import-table but denied " |
d62a17ae | 1078 | "by the ip protocol table route-map", |
bd47f3a3 JU |
1079 | __func__, |
1080 | VRF_LOGNAME(vrf), | |
1081 | vrf_id, buf); | |
d62a17ae | 1082 | rib_unlink(rn, re); |
1083 | } else | |
1084 | SET_FLAG(re->status, | |
1085 | ROUTE_ENTRY_REMOVED); | |
1086 | } | |
1087 | ||
1088 | continue; | |
1089 | } | |
bab85d4f | 1090 | |
d62a17ae | 1091 | /* Infinite distance. */ |
3332f4f0 DS |
1092 | if (re->distance == DISTANCE_INFINITY && |
1093 | re->type != ZEBRA_ROUTE_KERNEL) { | |
d62a17ae | 1094 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); |
1095 | continue; | |
1096 | } | |
bab85d4f | 1097 | |
d62a17ae | 1098 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_FIB_OVERRIDE)) { |
1099 | best = rib_choose_best(new_fib, re); | |
1100 | if (new_fib && best != new_fib) | |
1101 | UNSET_FLAG(new_fib->status, | |
1102 | ROUTE_ENTRY_CHANGED); | |
1103 | new_fib = best; | |
1104 | } else { | |
1105 | best = rib_choose_best(new_selected, re); | |
1106 | if (new_selected && best != new_selected) | |
1107 | UNSET_FLAG(new_selected->status, | |
1108 | ROUTE_ENTRY_CHANGED); | |
1109 | new_selected = best; | |
1110 | } | |
1111 | if (best != re) | |
1112 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
1113 | } /* RNODE_FOREACH_RE */ | |
1114 | ||
1115 | /* If no FIB override route, use the selected route also for FIB */ | |
1116 | if (new_fib == NULL) | |
1117 | new_fib = new_selected; | |
1118 | ||
1119 | /* After the cycle is finished, the following pointers will be set: | |
1120 | * old_selected --- RE entry currently having SELECTED | |
1121 | * new_selected --- RE entry that is newly SELECTED | |
1122 | * old_fib --- RE entry currently in kernel FIB | |
1123 | * new_fib --- RE entry that is newly to be in kernel FIB | |
1124 | * | |
1125 | * new_selected will get SELECTED flag, and is going to be redistributed | |
1126 | * the zclients. new_fib (which can be new_selected) will be installed | |
1127 | * in kernel. | |
1128 | */ | |
1129 | ||
1130 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { | |
1131 | zlog_debug( | |
bd47f3a3 JU |
1132 | "%s(%u):%s: After processing: old_selected %p new_selected %p old_fib %p new_fib %p", |
1133 | VRF_LOGNAME(vrf), vrf_id, buf, (void *)old_selected, | |
1134 | (void *)new_selected, (void *)old_fib, (void *)new_fib); | |
d62a17ae | 1135 | } |
446bb95e | 1136 | |
d62a17ae | 1137 | /* Buffer ROUTE_ENTRY_CHANGED here, because it will get cleared if |
1138 | * fib == selected */ | |
9d303b37 DL |
1139 | bool selected_changed = new_selected && CHECK_FLAG(new_selected->status, |
1140 | ROUTE_ENTRY_CHANGED); | |
d62a17ae | 1141 | |
1142 | /* Update fib according to selection results */ | |
1143 | if (new_fib && old_fib) | |
1144 | rib_process_update_fib(zvrf, rn, old_fib, new_fib); | |
1145 | else if (new_fib) | |
1146 | rib_process_add_fib(zvrf, rn, new_fib); | |
1147 | else if (old_fib) | |
1148 | rib_process_del_fib(zvrf, rn, old_fib); | |
1149 | ||
8cb41cd6 | 1150 | /* Update SELECTED entry */ |
d62a17ae | 1151 | if (old_selected != new_selected || selected_changed) { |
93bdadae | 1152 | |
6883bf8d | 1153 | if (new_selected && new_selected != new_fib) |
d62a17ae | 1154 | UNSET_FLAG(new_selected->status, ROUTE_ENTRY_CHANGED); |
41ec9222 | 1155 | |
3cdba47a | 1156 | if (new_selected) |
5af4b346 MS |
1157 | SET_FLAG(new_selected->flags, ZEBRA_FLAG_SELECTED); |
1158 | ||
d62a17ae | 1159 | if (old_selected) { |
40f321c0 MS |
1160 | /* |
1161 | * If we're removing the old entry, we should tell | |
1162 | * redist subscribers about that *if* they aren't | |
1163 | * going to see a redist for the new entry. | |
1164 | */ | |
1165 | if (!new_selected || CHECK_FLAG(old_selected->status, | |
1166 | ROUTE_ENTRY_REMOVED)) | |
1167 | redistribute_delete(p, src_p, | |
1168 | old_selected, | |
1169 | new_selected); | |
1170 | ||
d62a17ae | 1171 | if (old_selected != new_selected) |
1172 | UNSET_FLAG(old_selected->flags, | |
1173 | ZEBRA_FLAG_SELECTED); | |
f857321e | 1174 | } |
d62a17ae | 1175 | } |
3e5c6e00 | 1176 | |
d62a17ae | 1177 | /* Remove all RE entries queued for removal */ |
a2addae8 | 1178 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 1179 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { |
1180 | if (IS_ZEBRA_DEBUG_RIB) { | |
1181 | rnode_debug(rn, vrf_id, "rn %p, removing re %p", | |
1182 | (void *)rn, (void *)re); | |
1183 | } | |
1184 | rib_unlink(rn, re); | |
1185 | } | |
1186 | } | |
4d38fdb4 | 1187 | |
d62a17ae | 1188 | /* |
1189 | * Check if the dest can be deleted now. | |
1190 | */ | |
1191 | rib_gc_dest(rn); | |
e96f9203 DO |
1192 | } |
1193 | ||
a1494c25 DS |
1194 | static void zebra_rib_evaluate_mpls(struct route_node *rn) |
1195 | { | |
1196 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
1197 | struct zebra_vrf *zvrf = vrf_info_lookup(VRF_DEFAULT); | |
1198 | ||
1199 | if (!dest) | |
1200 | return; | |
1201 | ||
1202 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_LSPS)) { | |
1203 | if (IS_ZEBRA_DEBUG_MPLS) | |
1204 | zlog_debug( | |
bd47f3a3 JU |
1205 | "%s(%u): Scheduling all LSPs upon RIB completion", |
1206 | zvrf_name(zvrf), zvrf_id(zvrf)); | |
a1494c25 DS |
1207 | zebra_mpls_lsp_schedule(zvrf); |
1208 | mpls_unmark_lsps_for_processing(rn); | |
1209 | } | |
1210 | } | |
1211 | ||
e5ac2adf MS |
1212 | /* |
1213 | * Utility to match route with dplane context data | |
1214 | */ | |
1215 | static bool rib_route_match_ctx(const struct route_entry *re, | |
25779064 MS |
1216 | const struct zebra_dplane_ctx *ctx, |
1217 | bool is_update) | |
e5ac2adf MS |
1218 | { |
1219 | bool result = false; | |
1220 | ||
1221 | if (is_update) { | |
1222 | /* | |
1223 | * In 'update' case, we test info about the 'previous' or | |
1224 | * 'old' route | |
1225 | */ | |
1226 | if ((re->type == dplane_ctx_get_old_type(ctx)) && | |
1227 | (re->instance == dplane_ctx_get_old_instance(ctx))) { | |
1228 | result = true; | |
1229 | ||
1230 | /* TODO -- we're using this extra test, but it's not | |
1231 | * exactly clear why. | |
1232 | */ | |
1233 | if (re->type == ZEBRA_ROUTE_STATIC && | |
1234 | (re->distance != dplane_ctx_get_old_distance(ctx) || | |
1235 | re->tag != dplane_ctx_get_old_tag(ctx))) { | |
1236 | result = false; | |
1237 | } | |
1238 | } | |
1239 | ||
1240 | } else { | |
1241 | /* | |
1242 | * Ordinary, single-route case using primary context info | |
1243 | */ | |
1244 | if ((dplane_ctx_get_op(ctx) != DPLANE_OP_ROUTE_DELETE) && | |
1245 | CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
1246 | /* Skip route that's been deleted */ | |
1247 | goto done; | |
1248 | } | |
1249 | ||
1250 | if ((re->type == dplane_ctx_get_type(ctx)) && | |
1251 | (re->instance == dplane_ctx_get_instance(ctx))) { | |
1252 | result = true; | |
1253 | ||
1254 | /* TODO -- we're using this extra test, but it's not | |
1255 | * exactly clear why. | |
1256 | */ | |
1257 | if (re->type == ZEBRA_ROUTE_STATIC && | |
1258 | (re->distance != dplane_ctx_get_distance(ctx) || | |
1259 | re->tag != dplane_ctx_get_tag(ctx))) { | |
1260 | result = false; | |
1261 | } | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | done: | |
1266 | ||
1267 | return (result); | |
1268 | } | |
1269 | ||
3cdba47a DS |
1270 | static void zebra_rib_fixup_system(struct route_node *rn) |
1271 | { | |
1272 | struct route_entry *re; | |
1273 | ||
1274 | RNODE_FOREACH_RE(rn, re) { | |
1275 | struct nexthop *nhop; | |
1276 | ||
1277 | if (!RIB_SYSTEM_ROUTE(re)) | |
1278 | continue; | |
1279 | ||
1280 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
1281 | continue; | |
1282 | ||
1283 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
6d0ee6a0 | 1284 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); |
3cdba47a | 1285 | |
c415d895 | 1286 | for (ALL_NEXTHOPS(re->nhe->nhg, nhop)) { |
3cdba47a DS |
1287 | if (CHECK_FLAG(nhop->flags, NEXTHOP_FLAG_RECURSIVE)) |
1288 | continue; | |
1289 | ||
1290 | SET_FLAG(nhop->flags, NEXTHOP_FLAG_FIB); | |
1291 | } | |
1292 | } | |
1293 | } | |
1294 | ||
e5ac2adf | 1295 | /* |
78bf56b0 MS |
1296 | * Update a route from a dplane context. This consolidates common code |
1297 | * that can be used in processing of results from FIB updates, and in | |
1298 | * async notification processing. | |
efe6c026 | 1299 | * The return is 'true' if the installed nexthops changed; 'false' otherwise. |
e5ac2adf | 1300 | */ |
efe6c026 MS |
1301 | static bool rib_update_re_from_ctx(struct route_entry *re, |
1302 | struct route_node *rn, | |
1303 | struct zebra_dplane_ctx *ctx) | |
78bf56b0 | 1304 | { |
941e261c | 1305 | char dest_str[PREFIX_STRLEN] = ""; |
efe6c026 | 1306 | char nh_str[NEXTHOP_STRLEN]; |
78bf56b0 | 1307 | struct nexthop *nexthop, *ctx_nexthop; |
941e261c MS |
1308 | bool matched; |
1309 | const struct nexthop_group *ctxnhg; | |
efe6c026 MS |
1310 | bool is_selected = false; /* Is 're' currently the selected re? */ |
1311 | bool changed_p = false; /* Change to nexthops? */ | |
1312 | rib_dest_t *dest; | |
bd47f3a3 JU |
1313 | struct vrf *vrf; |
1314 | ||
1315 | vrf = vrf_lookup_by_id(re->vrf_id); | |
78bf56b0 | 1316 | |
941e261c MS |
1317 | /* Note well: only capturing the prefix string if debug is enabled here; |
1318 | * unconditional log messages will have to generate the string. | |
1319 | */ | |
1320 | if (IS_ZEBRA_DEBUG_RIB) | |
1321 | prefix2str(&(rn->p), dest_str, sizeof(dest_str)); | |
78bf56b0 | 1322 | |
efe6c026 MS |
1323 | dest = rib_dest_from_rnode(rn); |
1324 | if (dest) | |
1325 | is_selected = (re == dest->selected_fib); | |
1326 | ||
1327 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
bd47f3a3 JU |
1328 | zlog_debug("update_from_ctx: %s(%u):%s: %sSELECTED", |
1329 | VRF_LOGNAME(vrf), re->vrf_id, dest_str, | |
1330 | (is_selected ? "" : "NOT ")); | |
efe6c026 MS |
1331 | |
1332 | /* Update zebra's nexthop FIB flag for each nexthop that was installed. | |
941e261c | 1333 | * If the installed set differs from the set requested by the rib/owner, |
efe6c026 MS |
1334 | * we use the fib-specific nexthop-group to record the actual FIB |
1335 | * status. | |
78bf56b0 | 1336 | */ |
941e261c | 1337 | |
986a6617 SW |
1338 | /* Check both fib group and notif group for equivalence. |
1339 | * | |
1340 | * Let's assume the nexthops are ordered here to save time. | |
941e261c | 1341 | */ |
986a6617 | 1342 | if (nexthop_group_equal(&re->fib_ng, dplane_ctx_get_ng(ctx)) == false) { |
bd47f3a3 | 1343 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
986a6617 | 1344 | zlog_debug( |
bd47f3a3 JU |
1345 | "%s(%u):%s update_from_ctx: notif nh and fib nh mismatch", |
1346 | VRF_LOGNAME(vrf), re->vrf_id, dest_str); | |
941e261c | 1347 | |
986a6617 SW |
1348 | matched = false; |
1349 | } else | |
1350 | matched = true; | |
941e261c MS |
1351 | |
1352 | /* If the new FIB set matches the existing FIB set, we're done. */ | |
1353 | if (matched) { | |
1354 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 JU |
1355 | zlog_debug( |
1356 | "%s(%u):%s update_from_ctx(): existing fib nhg, no change", | |
1357 | VRF_LOGNAME(vrf), re->vrf_id, dest_str); | |
941e261c MS |
1358 | goto done; |
1359 | ||
1360 | } else if (re->fib_ng.nexthop) { | |
1361 | /* | |
1362 | * Free stale fib list and move on to check the rib nhg. | |
1363 | */ | |
1364 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 JU |
1365 | zlog_debug( |
1366 | "%s(%u):%s update_from_ctx(): replacing fib nhg", | |
1367 | VRF_LOGNAME(vrf), re->vrf_id, dest_str); | |
941e261c MS |
1368 | nexthops_free(re->fib_ng.nexthop); |
1369 | re->fib_ng.nexthop = NULL; | |
efe6c026 MS |
1370 | |
1371 | /* Note that the installed nexthops have changed */ | |
1372 | changed_p = true; | |
941e261c MS |
1373 | } else { |
1374 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 JU |
1375 | zlog_debug("%s(%u):%s update_from_ctx(): no fib nhg", |
1376 | VRF_LOGNAME(vrf), re->vrf_id, dest_str); | |
941e261c MS |
1377 | } |
1378 | ||
1379 | /* | |
1380 | * Compare with the rib nexthop group. The comparison here is different: | |
1381 | * the RIB group may be a superset of the list installed in the FIB. We | |
1382 | * walk the RIB group, looking for the 'installable' candidate | |
1383 | * nexthops, and then check those against the set | |
1384 | * that is actually installed. | |
986a6617 SW |
1385 | * |
1386 | * Assume nexthops are ordered here as well. | |
941e261c MS |
1387 | */ |
1388 | matched = true; | |
986a6617 SW |
1389 | |
1390 | ctx_nexthop = dplane_ctx_get_ng(ctx)->nexthop; | |
1391 | ||
1f6a5aca MS |
1392 | /* Nothing installed - we can skip some of the checking/comparison |
1393 | * of nexthops. | |
1394 | */ | |
1395 | if (ctx_nexthop == NULL) { | |
1396 | changed_p = true; | |
1397 | goto no_nexthops; | |
1398 | } | |
1399 | ||
986a6617 SW |
1400 | /* Get the first `installed` one to check against. |
1401 | * If the dataplane doesn't set these to be what was actually installed, | |
0eb97b86 | 1402 | * it will just be whatever was in re->nhe->nhg? |
986a6617 SW |
1403 | */ |
1404 | if (CHECK_FLAG(ctx_nexthop->flags, NEXTHOP_FLAG_RECURSIVE) | |
1405 | || !CHECK_FLAG(ctx_nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1406 | ctx_nexthop = nexthop_next_active_resolved(ctx_nexthop); | |
1407 | ||
c415d895 | 1408 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) { |
78bf56b0 | 1409 | |
5695d9ac | 1410 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) |
78bf56b0 MS |
1411 | continue; |
1412 | ||
941e261c MS |
1413 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) |
1414 | continue; | |
5695d9ac | 1415 | |
941e261c | 1416 | /* Check for a FIB nexthop corresponding to the RIB nexthop */ |
986a6617 SW |
1417 | if (nexthop_same(ctx_nexthop, nexthop) == false) { |
1418 | /* If the FIB doesn't know about the nexthop, | |
1419 | * it's not installed | |
1420 | */ | |
efe6c026 MS |
1421 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { |
1422 | nexthop2str(nexthop, nh_str, sizeof(nh_str)); | |
986a6617 SW |
1423 | zlog_debug( |
1424 | "update_from_ctx: no notif match for rib nh %s", | |
1425 | nh_str); | |
efe6c026 | 1426 | } |
941e261c | 1427 | matched = false; |
efe6c026 MS |
1428 | |
1429 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1430 | changed_p = true; | |
1431 | ||
1432 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
11260e70 MS |
1433 | |
1434 | /* Keep checking nexthops */ | |
1435 | continue; | |
5695d9ac | 1436 | } |
78bf56b0 | 1437 | |
efe6c026 MS |
1438 | if (CHECK_FLAG(ctx_nexthop->flags, NEXTHOP_FLAG_FIB)) { |
1439 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1440 | changed_p = true; | |
1441 | ||
5695d9ac | 1442 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
efe6c026 MS |
1443 | } else { |
1444 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1445 | changed_p = true; | |
1446 | ||
5695d9ac | 1447 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
efe6c026 | 1448 | } |
986a6617 SW |
1449 | |
1450 | ctx_nexthop = nexthop_next_active_resolved(ctx_nexthop); | |
78bf56b0 MS |
1451 | } |
1452 | ||
941e261c MS |
1453 | /* If all nexthops were processed, we're done */ |
1454 | if (matched) { | |
1455 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 JU |
1456 | zlog_debug( |
1457 | "%s(%u):%s update_from_ctx(): rib nhg matched, changed '%s'", | |
1458 | VRF_LOGNAME(vrf), re->vrf_id, dest_str, | |
1459 | (changed_p ? "true" : "false")); | |
941e261c MS |
1460 | goto done; |
1461 | } | |
78bf56b0 | 1462 | |
1f6a5aca MS |
1463 | no_nexthops: |
1464 | ||
941e261c MS |
1465 | /* FIB nexthop set differs from the RIB set: |
1466 | * create a fib-specific nexthop-group | |
1467 | */ | |
1468 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 JU |
1469 | zlog_debug( |
1470 | "%s(%u):%s update_from_ctx(): changed %s, adding new fib nhg", | |
1471 | VRF_LOGNAME(vrf), re->vrf_id, dest_str, | |
1472 | (changed_p ? "true" : "false")); | |
941e261c MS |
1473 | |
1474 | ctxnhg = dplane_ctx_get_ng(ctx); | |
188a00e0 MS |
1475 | |
1476 | if (ctxnhg->nexthop) | |
1477 | copy_nexthops(&(re->fib_ng.nexthop), ctxnhg->nexthop, NULL); | |
1478 | else { | |
1479 | /* Bit of a special case when the fib has _no_ installed | |
1480 | * nexthops. | |
1481 | */ | |
1482 | nexthop = nexthop_new(); | |
1483 | nexthop->type = NEXTHOP_TYPE_IPV4; | |
50d89650 | 1484 | _nexthop_add(&(re->fib_ng.nexthop), nexthop); |
188a00e0 | 1485 | } |
941e261c MS |
1486 | |
1487 | done: | |
efe6c026 | 1488 | return changed_p; |
78bf56b0 MS |
1489 | } |
1490 | ||
e5ac2adf | 1491 | /* |
fad4d69c MS |
1492 | * Helper to locate a zebra route-node from a dplane context. This is used |
1493 | * when processing dplane results, e.g. Note well: the route-node is returned | |
1494 | * with a ref held - route_unlock_node() must be called eventually. | |
e5ac2adf | 1495 | */ |
fad4d69c MS |
1496 | static struct route_node * |
1497 | rib_find_rn_from_ctx(const struct zebra_dplane_ctx *ctx) | |
e5ac2adf MS |
1498 | { |
1499 | struct route_table *table = NULL; | |
1500 | struct route_node *rn = NULL; | |
e5ac2adf MS |
1501 | const struct prefix *dest_pfx, *src_pfx; |
1502 | ||
1503 | /* Locate rn and re(s) from ctx */ | |
1504 | ||
c7c0b007 SW |
1505 | table = zebra_vrf_lookup_table_with_table_id( |
1506 | dplane_ctx_get_afi(ctx), dplane_ctx_get_safi(ctx), | |
1507 | dplane_ctx_get_vrf(ctx), dplane_ctx_get_table(ctx)); | |
e5ac2adf MS |
1508 | if (table == NULL) { |
1509 | if (IS_ZEBRA_DEBUG_DPLANE) { | |
bd47f3a3 JU |
1510 | zlog_debug( |
1511 | "Failed to find route for ctx: no table for afi %d, safi %d, vrf %s(%u)", | |
1512 | dplane_ctx_get_afi(ctx), | |
1513 | dplane_ctx_get_safi(ctx), | |
1514 | vrf_id_to_name(dplane_ctx_get_vrf(ctx)), | |
1515 | dplane_ctx_get_vrf(ctx)); | |
e5ac2adf MS |
1516 | } |
1517 | goto done; | |
1518 | } | |
1519 | ||
fad4d69c MS |
1520 | dest_pfx = dplane_ctx_get_dest(ctx); |
1521 | src_pfx = dplane_ctx_get_src(ctx); | |
1522 | ||
1523 | rn = srcdest_rnode_get(table, dest_pfx, | |
1524 | src_pfx ? (struct prefix_ipv6 *)src_pfx : NULL); | |
1525 | ||
1526 | done: | |
1527 | return rn; | |
1528 | } | |
1529 | ||
1530 | ||
97f5b441 | 1531 | |
fad4d69c MS |
1532 | /* |
1533 | * Route-update results processing after async dataplane update. | |
1534 | */ | |
1535 | static void rib_process_result(struct zebra_dplane_ctx *ctx) | |
1536 | { | |
1537 | struct zebra_vrf *zvrf = NULL; | |
bd47f3a3 | 1538 | struct vrf *vrf; |
fad4d69c MS |
1539 | struct route_node *rn = NULL; |
1540 | struct route_entry *re = NULL, *old_re = NULL, *rib; | |
1541 | bool is_update = false; | |
1542 | char dest_str[PREFIX_STRLEN] = ""; | |
1543 | enum dplane_op_e op; | |
1544 | enum zebra_dplane_result status; | |
1545 | const struct prefix *dest_pfx, *src_pfx; | |
1546 | uint32_t seq; | |
efe6c026 | 1547 | bool fib_changed = false; |
97f5b441 | 1548 | |
fad4d69c | 1549 | zvrf = vrf_info_lookup(dplane_ctx_get_vrf(ctx)); |
bd47f3a3 | 1550 | vrf = vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); |
e5ac2adf MS |
1551 | dest_pfx = dplane_ctx_get_dest(ctx); |
1552 | ||
1553 | /* Note well: only capturing the prefix string if debug is enabled here; | |
1554 | * unconditional log messages will have to generate the string. | |
1555 | */ | |
5709131c | 1556 | if (IS_ZEBRA_DEBUG_DPLANE) |
e5ac2adf | 1557 | prefix2str(dest_pfx, dest_str, sizeof(dest_str)); |
e5ac2adf | 1558 | |
fad4d69c MS |
1559 | /* Locate rn and re(s) from ctx */ |
1560 | rn = rib_find_rn_from_ctx(ctx); | |
e5ac2adf MS |
1561 | if (rn == NULL) { |
1562 | if (IS_ZEBRA_DEBUG_DPLANE) { | |
bd47f3a3 JU |
1563 | zlog_debug( |
1564 | "Failed to process dplane results: no route for %s(%u):%s", | |
1565 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), | |
1566 | dest_str); | |
e5ac2adf MS |
1567 | } |
1568 | goto done; | |
1569 | } | |
1570 | ||
1571 | srcdest_rnode_prefixes(rn, &dest_pfx, &src_pfx); | |
1572 | ||
1573 | op = dplane_ctx_get_op(ctx); | |
1574 | status = dplane_ctx_get_status(ctx); | |
1575 | ||
c831033f | 1576 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) |
bd47f3a3 JU |
1577 | zlog_debug( |
1578 | "%s(%u):%s Processing dplane ctx %p, op %s result %s", | |
1579 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), dest_str, | |
1580 | ctx, dplane_op2str(op), dplane_res2str(status)); | |
e5ac2adf | 1581 | |
e5ac2adf MS |
1582 | /* |
1583 | * Update is a bit of a special case, where we may have both old and new | |
1584 | * routes to post-process. | |
1585 | */ | |
1586 | is_update = dplane_ctx_is_update(ctx); | |
1587 | ||
1588 | /* | |
1589 | * Take a pass through the routes, look for matches with the context | |
1590 | * info. | |
1591 | */ | |
1592 | RNODE_FOREACH_RE(rn, rib) { | |
1593 | ||
1594 | if (re == NULL) { | |
5709131c | 1595 | if (rib_route_match_ctx(rib, ctx, false)) |
e5ac2adf | 1596 | re = rib; |
e5ac2adf MS |
1597 | } |
1598 | ||
1599 | /* Check for old route match */ | |
1600 | if (is_update && (old_re == NULL)) { | |
5709131c | 1601 | if (rib_route_match_ctx(rib, ctx, true /*is_update*/)) |
e5ac2adf | 1602 | old_re = rib; |
e5ac2adf MS |
1603 | } |
1604 | ||
1605 | /* Have we found the routes we need to work on? */ | |
5709131c | 1606 | if (re && ((!is_update || old_re))) |
e5ac2adf | 1607 | break; |
e5ac2adf MS |
1608 | } |
1609 | ||
699dae23 DS |
1610 | seq = dplane_ctx_get_seq(ctx); |
1611 | ||
e5ac2adf MS |
1612 | /* |
1613 | * Check sequence number(s) to detect stale results before continuing | |
1614 | */ | |
60f98b23 | 1615 | if (re) { |
699dae23 | 1616 | if (re->dplane_sequence != seq) { |
60f98b23 | 1617 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) |
bd47f3a3 JU |
1618 | zlog_debug( |
1619 | "%s(%u):%s Stale dplane result for re %p", | |
1620 | VRF_LOGNAME(vrf), | |
1621 | dplane_ctx_get_vrf(ctx), dest_str, re); | |
60f98b23 DS |
1622 | } else |
1623 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); | |
e5ac2adf MS |
1624 | } |
1625 | ||
60f98b23 DS |
1626 | if (old_re) { |
1627 | if (old_re->dplane_sequence != dplane_ctx_get_old_seq(ctx)) { | |
1628 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) | |
bd47f3a3 JU |
1629 | zlog_debug( |
1630 | "%s(%u):%s Stale dplane result for old_re %p", | |
1631 | VRF_LOGNAME(vrf), | |
1632 | dplane_ctx_get_vrf(ctx), dest_str, | |
1633 | old_re); | |
60f98b23 | 1634 | } else |
9ef0c6ba | 1635 | UNSET_FLAG(old_re->status, ROUTE_ENTRY_QUEUED); |
e5ac2adf MS |
1636 | } |
1637 | ||
12e7fe3a | 1638 | switch (op) { |
12e7fe3a DS |
1639 | case DPLANE_OP_ROUTE_INSTALL: |
1640 | case DPLANE_OP_ROUTE_UPDATE: | |
1641 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
677c1dd5 DS |
1642 | if (re) { |
1643 | UNSET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
1644 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
1645 | } | |
b9f0e5ee DS |
1646 | /* |
1647 | * On an update operation from the same route type | |
1648 | * context retrieval currently has no way to know | |
1649 | * which was the old and which was the new. | |
1650 | * So don't unset our flags that we just set. | |
1651 | * We know redistribution is ok because the | |
1652 | * old_re in this case is used for nothing | |
1653 | * more than knowing whom to contact if necessary. | |
1654 | */ | |
1655 | if (old_re && old_re != re) { | |
677c1dd5 DS |
1656 | UNSET_FLAG(old_re->status, ROUTE_ENTRY_FAILED); |
1657 | UNSET_FLAG(old_re->status, | |
1658 | ROUTE_ENTRY_INSTALLED); | |
1659 | } | |
f183e380 | 1660 | |
78bf56b0 | 1661 | /* Update zebra route based on the results in |
941e261c | 1662 | * the context struct. |
78bf56b0 | 1663 | */ |
941e261c | 1664 | if (re) { |
efe6c026 MS |
1665 | fib_changed = |
1666 | rib_update_re_from_ctx(re, rn, ctx); | |
1667 | ||
1668 | if (!fib_changed) { | |
1669 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) | |
bd47f3a3 JU |
1670 | zlog_debug( |
1671 | "%s(%u):%s no fib change for re", | |
1672 | VRF_LOGNAME(vrf), | |
1673 | dplane_ctx_get_vrf(ctx), | |
1674 | dest_str); | |
12e7fe3a DS |
1675 | } |
1676 | ||
941e261c MS |
1677 | /* Redistribute */ |
1678 | redistribute_update(dest_pfx, src_pfx, | |
228a811a | 1679 | re, old_re); |
f183e380 MS |
1680 | } |
1681 | ||
3cdba47a DS |
1682 | /* |
1683 | * System routes are weird in that they | |
1684 | * allow multiple to be installed that match | |
1685 | * to the same prefix, so after we get the | |
1686 | * result we need to clean them up so that | |
1687 | * we can actually use them. | |
1688 | */ | |
1689 | if ((re && RIB_SYSTEM_ROUTE(re)) || | |
1690 | (old_re && RIB_SYSTEM_ROUTE(old_re))) | |
1691 | zebra_rib_fixup_system(rn); | |
1692 | ||
f4c6e2a8 | 1693 | if (zvrf) |
12e7fe3a | 1694 | zvrf->installs++; |
f183e380 | 1695 | |
12e7fe3a | 1696 | /* Notify route owner */ |
677c1dd5 | 1697 | zsend_route_notify_owner_ctx(ctx, ZAPI_ROUTE_INSTALLED); |
e5ac2adf | 1698 | |
12e7fe3a | 1699 | } else { |
7a230a9d | 1700 | if (re) { |
677c1dd5 | 1701 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); |
7a230a9d DS |
1702 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
1703 | } if (old_re) | |
677c1dd5 DS |
1704 | SET_FLAG(old_re->status, ROUTE_ENTRY_FAILED); |
1705 | if (re) | |
1706 | zsend_route_notify_owner(re, dest_pfx, | |
1707 | ZAPI_ROUTE_FAIL_INSTALL); | |
97f5b441 | 1708 | |
bd47f3a3 JU |
1709 | zlog_warn("%s(%u):%s: Route install failed", |
1710 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), | |
1711 | prefix2str(dest_pfx, dest_str, | |
1712 | sizeof(dest_str))); | |
12e7fe3a DS |
1713 | } |
1714 | break; | |
1715 | case DPLANE_OP_ROUTE_DELETE: | |
677c1dd5 DS |
1716 | if (re) |
1717 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
12e7fe3a DS |
1718 | /* |
1719 | * In the delete case, the zebra core datastructs were | |
1720 | * updated (or removed) at the time the delete was issued, | |
1721 | * so we're just notifying the route owner. | |
e5ac2adf | 1722 | */ |
12e7fe3a | 1723 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { |
677c1dd5 DS |
1724 | if (re) { |
1725 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
1726 | UNSET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
1727 | } | |
12e7fe3a | 1728 | zsend_route_notify_owner_ctx(ctx, ZAPI_ROUTE_REMOVED); |
e5ac2adf | 1729 | |
12e7fe3a DS |
1730 | if (zvrf) |
1731 | zvrf->removals++; | |
1732 | } else { | |
677c1dd5 DS |
1733 | if (re) |
1734 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
12e7fe3a DS |
1735 | zsend_route_notify_owner_ctx(ctx, |
1736 | ZAPI_ROUTE_REMOVE_FAIL); | |
e5ac2adf | 1737 | |
bd47f3a3 JU |
1738 | zlog_warn("%s(%u):%s: Route Deletion failure", |
1739 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), | |
1740 | prefix2str(dest_pfx, dest_str, | |
1741 | sizeof(dest_str))); | |
12e7fe3a | 1742 | } |
3cdba47a DS |
1743 | |
1744 | /* | |
1745 | * System routes are weird in that they | |
1746 | * allow multiple to be installed that match | |
1747 | * to the same prefix, so after we get the | |
1748 | * result we need to clean them up so that | |
1749 | * we can actually use them. | |
1750 | */ | |
1751 | if ((re && RIB_SYSTEM_ROUTE(re)) || | |
1752 | (old_re && RIB_SYSTEM_ROUTE(old_re))) | |
1753 | zebra_rib_fixup_system(rn); | |
12e7fe3a | 1754 | break; |
d37f4d6c MS |
1755 | default: |
1756 | break; | |
e5ac2adf | 1757 | } |
699dae23 DS |
1758 | |
1759 | zebra_rib_evaluate_rn_nexthops(rn, seq); | |
a1494c25 | 1760 | zebra_rib_evaluate_mpls(rn); |
e5ac2adf MS |
1761 | done: |
1762 | ||
5f27bcba DS |
1763 | if (rn) |
1764 | route_unlock_node(rn); | |
1765 | ||
e5ac2adf MS |
1766 | /* Return context to dataplane module */ |
1767 | dplane_ctx_fini(&ctx); | |
1768 | } | |
1769 | ||
54818e3b MS |
1770 | /* |
1771 | * Handle notification from async dataplane: the dataplane has detected | |
1772 | * some change to a route, and notifies zebra so that the control plane | |
1773 | * can reflect that change. | |
1774 | */ | |
1775 | static void rib_process_dplane_notify(struct zebra_dplane_ctx *ctx) | |
1776 | { | |
1777 | struct route_node *rn = NULL; | |
efe6c026 | 1778 | struct route_entry *re = NULL; |
bd47f3a3 | 1779 | struct vrf *vrf; |
efe6c026 | 1780 | struct nexthop *nexthop; |
54818e3b MS |
1781 | char dest_str[PREFIX_STRLEN] = ""; |
1782 | const struct prefix *dest_pfx, *src_pfx; | |
941e261c | 1783 | rib_dest_t *dest; |
efe6c026 | 1784 | bool fib_changed = false; |
941e261c | 1785 | bool debug_p = IS_ZEBRA_DEBUG_DPLANE | IS_ZEBRA_DEBUG_RIB; |
efe6c026 | 1786 | int start_count, end_count; |
54818e3b | 1787 | dest_pfx = dplane_ctx_get_dest(ctx); |
bd47f3a3 | 1788 | vrf = vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); |
54818e3b MS |
1789 | |
1790 | /* Note well: only capturing the prefix string if debug is enabled here; | |
1791 | * unconditional log messages will have to generate the string. | |
1792 | */ | |
941e261c | 1793 | if (debug_p) |
54818e3b MS |
1794 | prefix2str(dest_pfx, dest_str, sizeof(dest_str)); |
1795 | ||
1796 | /* Locate rn and re(s) from ctx */ | |
1797 | rn = rib_find_rn_from_ctx(ctx); | |
1798 | if (rn == NULL) { | |
941e261c | 1799 | if (debug_p) { |
bd47f3a3 JU |
1800 | zlog_debug( |
1801 | "Failed to process dplane notification: no routes for %s(%u):%s", | |
1802 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), | |
1803 | dest_str); | |
54818e3b MS |
1804 | } |
1805 | goto done; | |
1806 | } | |
1807 | ||
941e261c | 1808 | dest = rib_dest_from_rnode(rn); |
54818e3b MS |
1809 | srcdest_rnode_prefixes(rn, &dest_pfx, &src_pfx); |
1810 | ||
efe6c026 | 1811 | if (debug_p) |
bd47f3a3 JU |
1812 | zlog_debug("%s(%u):%s Processing dplane notif ctx %p", |
1813 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), dest_str, | |
1814 | ctx); | |
54818e3b MS |
1815 | |
1816 | /* | |
1817 | * Take a pass through the routes, look for matches with the context | |
1818 | * info. | |
1819 | */ | |
efe6c026 MS |
1820 | RNODE_FOREACH_RE(rn, re) { |
1821 | if (rib_route_match_ctx(re, ctx, false /*!update*/)) | |
54818e3b MS |
1822 | break; |
1823 | } | |
1824 | ||
1825 | /* No match? Nothing we can do */ | |
1826 | if (re == NULL) { | |
941e261c | 1827 | if (debug_p) |
bd47f3a3 JU |
1828 | zlog_debug( |
1829 | "%s(%u):%s Unable to process dplane notification: no entry for type %s", | |
1830 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), | |
1831 | dest_str, | |
1832 | zebra_route_string(dplane_ctx_get_type(ctx))); | |
54818e3b MS |
1833 | |
1834 | goto done; | |
1835 | } | |
1836 | ||
272e8903 MS |
1837 | /* Ensure we clear the QUEUED flag */ |
1838 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); | |
1839 | ||
4c0b5436 MS |
1840 | /* Is this a notification that ... matters? We mostly care about |
1841 | * the route that is currently selected for installation; we may also | |
1842 | * get an un-install notification, and handle that too. | |
941e261c MS |
1843 | */ |
1844 | if (re != dest->selected_fib) { | |
4c0b5436 MS |
1845 | /* |
1846 | * If we need to, clean up after a delete that was part of | |
1847 | * an update operation. | |
941e261c | 1848 | */ |
4c0b5436 MS |
1849 | end_count = 0; |
1850 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
1851 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1852 | end_count++; | |
1853 | } | |
1854 | ||
1855 | /* If no nexthops or none installed, ensure that this re | |
1856 | * gets its 'installed' flag cleared. | |
1857 | */ | |
1858 | if (end_count == 0) { | |
1859 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED)) | |
1860 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
1861 | if (debug_p) | |
bd47f3a3 JU |
1862 | zlog_debug( |
1863 | "%s(%u):%s dplane notif, uninstalled type %s route", | |
1864 | VRF_LOGNAME(vrf), | |
1865 | dplane_ctx_get_vrf(ctx), dest_str, | |
1866 | zebra_route_string( | |
1867 | dplane_ctx_get_type(ctx))); | |
4c0b5436 MS |
1868 | } else { |
1869 | /* At least report on the event. */ | |
1870 | if (debug_p) | |
bd47f3a3 JU |
1871 | zlog_debug( |
1872 | "%s(%u):%s dplane notif, but type %s not selected_fib", | |
1873 | VRF_LOGNAME(vrf), | |
1874 | dplane_ctx_get_vrf(ctx), dest_str, | |
1875 | zebra_route_string( | |
1876 | dplane_ctx_get_type(ctx))); | |
4c0b5436 | 1877 | } |
941e261c MS |
1878 | goto done; |
1879 | } | |
1880 | ||
efe6c026 MS |
1881 | /* We'll want to determine whether the installation status of the |
1882 | * route has changed: we'll check the status before processing, | |
1883 | * and then again if there's been a change. | |
1884 | */ | |
1885 | start_count = 0; | |
1c30d64b MS |
1886 | |
1887 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED)) { | |
1888 | for (ALL_NEXTHOPS_PTR(rib_active_nhg(re), nexthop)) { | |
1889 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1890 | start_count++; | |
1891 | } | |
efe6c026 MS |
1892 | } |
1893 | ||
54818e3b MS |
1894 | /* Update zebra's nexthop FIB flags based on the context struct's |
1895 | * nexthops. | |
1896 | */ | |
efe6c026 | 1897 | fib_changed = rib_update_re_from_ctx(re, rn, ctx); |
54818e3b | 1898 | |
efe6c026 MS |
1899 | if (!fib_changed) { |
1900 | if (debug_p) | |
bd47f3a3 JU |
1901 | zlog_debug( |
1902 | "%s(%u):%s dplane notification: rib_update returns FALSE", | |
1903 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), | |
1904 | dest_str); | |
54818e3b MS |
1905 | } |
1906 | ||
188a00e0 MS |
1907 | /* |
1908 | * Perform follow-up work if the actual status of the prefix | |
efe6c026 | 1909 | * changed. |
941e261c MS |
1910 | */ |
1911 | ||
efe6c026 MS |
1912 | end_count = 0; |
1913 | for (ALL_NEXTHOPS_PTR(rib_active_nhg(re), nexthop)) { | |
1914 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1915 | end_count++; | |
1916 | } | |
941e261c | 1917 | |
188a00e0 MS |
1918 | /* Various fib transitions: changed nexthops; from installed to |
1919 | * not-installed; or not-installed to installed. | |
efe6c026 | 1920 | */ |
188a00e0 | 1921 | if (start_count > 0 && end_count > 0) { |
11260e70 | 1922 | if (debug_p) |
bd47f3a3 JU |
1923 | zlog_debug( |
1924 | "%s(%u):%s applied nexthop changes from dplane notification", | |
1925 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), | |
1926 | dest_str); | |
188a00e0 MS |
1927 | |
1928 | /* Changed nexthops - update kernel/others */ | |
1929 | dplane_route_notif_update(rn, re, | |
1930 | DPLANE_OP_ROUTE_UPDATE, ctx); | |
1931 | ||
1932 | } else if (start_count == 0 && end_count > 0) { | |
efe6c026 | 1933 | if (debug_p) |
bd47f3a3 JU |
1934 | zlog_debug( |
1935 | "%s(%u):%s installed transition from dplane notification", | |
1936 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), | |
1937 | dest_str); | |
efe6c026 MS |
1938 | |
1939 | /* We expect this to be the selected route, so we want | |
272e8903 | 1940 | * to tell others about this transition. |
efe6c026 MS |
1941 | */ |
1942 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
1943 | ||
188a00e0 MS |
1944 | /* Changed nexthops - update kernel/others */ |
1945 | dplane_route_notif_update(rn, re, DPLANE_OP_ROUTE_INSTALL, ctx); | |
1946 | ||
efe6c026 MS |
1947 | /* Redistribute, lsp, and nht update */ |
1948 | redistribute_update(dest_pfx, src_pfx, re, NULL); | |
1949 | ||
efe6c026 MS |
1950 | } else if (start_count > 0 && end_count == 0) { |
1951 | if (debug_p) | |
bd47f3a3 JU |
1952 | zlog_debug( |
1953 | "%s(%u):%s un-installed transition from dplane notification", | |
1954 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), | |
1955 | dest_str); | |
efe6c026 MS |
1956 | |
1957 | /* Transition from _something_ installed to _nothing_ | |
1958 | * installed. | |
1959 | */ | |
1960 | /* We expect this to be the selected route, so we want | |
1961 | * to tell others about this transistion. | |
1962 | */ | |
1963 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
1964 | ||
188a00e0 MS |
1965 | /* Changed nexthops - update kernel/others */ |
1966 | dplane_route_notif_update(rn, re, DPLANE_OP_ROUTE_DELETE, ctx); | |
1967 | ||
efe6c026 | 1968 | /* Redistribute, lsp, and nht update */ |
40f321c0 | 1969 | redistribute_delete(dest_pfx, src_pfx, re, NULL); |
9287b4c5 | 1970 | } |
efe6c026 | 1971 | |
9287b4c5 MS |
1972 | /* Make any changes visible for lsp and nexthop-tracking processing */ |
1973 | zebra_rib_evaluate_rn_nexthops( | |
1974 | rn, zebra_router_get_next_sequence()); | |
efe6c026 | 1975 | |
9287b4c5 | 1976 | zebra_rib_evaluate_mpls(rn); |
941e261c | 1977 | |
54818e3b | 1978 | done: |
941e261c MS |
1979 | if (rn) |
1980 | route_unlock_node(rn); | |
1981 | ||
54818e3b MS |
1982 | /* Return context to dataplane module */ |
1983 | dplane_ctx_fini(&ctx); | |
1984 | } | |
1985 | ||
e22e8001 | 1986 | static void process_subq_nhg(struct listnode *lnode) |
e96f9203 | 1987 | { |
e22e8001 SW |
1988 | struct nhg_ctx *ctx = NULL; |
1989 | uint8_t qindex = route_info[ZEBRA_ROUTE_NHG].meta_q_map; | |
5110a0c6 | 1990 | |
e22e8001 SW |
1991 | ctx = listgetdata(lnode); |
1992 | ||
1993 | if (!ctx) | |
1994 | return; | |
1995 | ||
1996 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
1997 | zlog_debug("NHG Context id=%u dequeued from sub-queue %u", | |
1998 | ctx->id, qindex); | |
1999 | ||
2000 | rib_nhg_process(ctx); | |
2001 | } | |
2002 | ||
2003 | static void process_subq_route(struct listnode *lnode, uint8_t qindex) | |
2004 | { | |
2005 | struct route_node *rnode = NULL; | |
2006 | rib_dest_t *dest = NULL; | |
2007 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 | 2008 | |
d62a17ae | 2009 | rnode = listgetdata(lnode); |
2010 | dest = rib_dest_from_rnode(rnode); | |
2011 | if (dest) | |
2012 | zvrf = rib_dest_vrf(dest); | |
41ec9222 | 2013 | |
d62a17ae | 2014 | rib_process(rnode); |
5110a0c6 | 2015 | |
d62a17ae | 2016 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { |
2017 | char buf[SRCDEST2STR_BUFFER]; | |
efe6c026 | 2018 | |
d62a17ae | 2019 | srcdest_rnode2str(rnode, buf, sizeof(buf)); |
bd47f3a3 JU |
2020 | zlog_debug("%s(%u):%s: rn %p dequeued from sub-queue %u", |
2021 | zvrf_name(zvrf), zvrf_id(zvrf), buf, rnode, qindex); | |
d62a17ae | 2022 | } |
41ec9222 | 2023 | |
d62a17ae | 2024 | if (rnode->info) |
2025 | UNSET_FLAG(rib_dest_from_rnode(rnode)->flags, | |
2026 | RIB_ROUTE_QUEUED(qindex)); | |
9fd92e3c | 2027 | |
67b9467f | 2028 | #if 0 |
5110a0c6 SH |
2029 | else |
2030 | { | |
2031 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
2032 | __func__, rnode, rnode->lock); | |
2033 | zlog_backtrace(LOG_DEBUG); | |
2034 | } | |
67b9467f | 2035 | #endif |
d62a17ae | 2036 | route_unlock_node(rnode); |
e22e8001 SW |
2037 | } |
2038 | ||
2039 | /* Take a list of route_node structs and return 1, if there was a record | |
2040 | * picked from it and processed by rib_process(). Don't process more, | |
2041 | * than one RN record; operate only in the specified sub-queue. | |
2042 | */ | |
2043 | static unsigned int process_subq(struct list *subq, uint8_t qindex) | |
2044 | { | |
2045 | struct listnode *lnode = listhead(subq); | |
2046 | ||
2047 | if (!lnode) | |
2048 | return 0; | |
2049 | ||
2050 | if (qindex == route_info[ZEBRA_ROUTE_NHG].meta_q_map) | |
2051 | process_subq_nhg(lnode); | |
2052 | else | |
2053 | process_subq_route(lnode, qindex); | |
2054 | ||
d62a17ae | 2055 | list_delete_node(subq, lnode); |
e22e8001 | 2056 | |
d62a17ae | 2057 | return 1; |
e96f9203 DO |
2058 | } |
2059 | ||
2060 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from | |
d62a17ae | 2061 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and |
2062 | * data | |
e96f9203 DO |
2063 | * is pointed to the meta queue structure. |
2064 | */ | |
d62a17ae | 2065 | static wq_item_status meta_queue_process(struct work_queue *dummy, void *data) |
e96f9203 | 2066 | { |
d62a17ae | 2067 | struct meta_queue *mq = data; |
2068 | unsigned i; | |
91f16812 MS |
2069 | uint32_t queue_len, queue_limit; |
2070 | ||
2071 | /* Ensure there's room for more dataplane updates */ | |
2072 | queue_limit = dplane_get_in_queue_limit(); | |
2073 | queue_len = dplane_get_in_queue_len(); | |
2074 | if (queue_len > queue_limit) { | |
2075 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
8b962e77 MS |
2076 | zlog_debug("rib queue: dplane queue len %u, limit %u, retrying", |
2077 | queue_len, queue_limit); | |
91f16812 MS |
2078 | |
2079 | /* Ensure that the meta-queue is actually enqueued */ | |
489a9614 | 2080 | if (work_queue_empty(zrouter.ribq)) |
ea45a4e7 | 2081 | work_queue_add(zrouter.ribq, zrouter.mq); |
91f16812 MS |
2082 | |
2083 | return WQ_QUEUE_BLOCKED; | |
2084 | } | |
5110a0c6 | 2085 | |
d62a17ae | 2086 | for (i = 0; i < MQ_SIZE; i++) |
2087 | if (process_subq(mq->subq[i], i)) { | |
2088 | mq->size--; | |
2089 | break; | |
2090 | } | |
2091 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; | |
e96f9203 DO |
2092 | } |
2093 | ||
f52ed677 DS |
2094 | |
2095 | /* | |
2096 | * Look into the RN and queue it into the highest priority queue | |
2097 | * at this point in time for processing. | |
2098 | * | |
2099 | * We will enqueue a route node only once per invocation. | |
2100 | * | |
2101 | * There are two possibilities here that should be kept in mind. | |
2102 | * If the original invocation has not been pulled off for processing | |
2103 | * yet, A subsuquent invocation can have a route entry with a better | |
2104 | * meta queue index value and we can have a situation where | |
2105 | * we might have the same node enqueued 2 times. Not necessarily | |
2106 | * an optimal situation but it should be ok. | |
2107 | * | |
2108 | * The other possibility is that the original invocation has not | |
2109 | * been pulled off for processing yet, A subsusquent invocation | |
2110 | * doesn't have a route_entry with a better meta-queue and the | |
2111 | * original metaqueue index value will win and we'll end up with | |
2112 | * the route node enqueued once. | |
e96f9203 | 2113 | */ |
e22e8001 | 2114 | static int rib_meta_queue_add(struct meta_queue *mq, void *data) |
e96f9203 | 2115 | { |
e22e8001 | 2116 | struct route_node *rn = NULL; |
f52ed677 DS |
2117 | struct route_entry *re = NULL, *curr_re = NULL; |
2118 | uint8_t qindex = MQ_SIZE, curr_qindex = MQ_SIZE; | |
5110a0c6 | 2119 | |
e22e8001 SW |
2120 | rn = (struct route_node *)data; |
2121 | ||
f52ed677 DS |
2122 | RNODE_FOREACH_RE (rn, curr_re) { |
2123 | curr_qindex = route_info[curr_re->type].meta_q_map; | |
d62a17ae | 2124 | |
f52ed677 DS |
2125 | if (curr_qindex <= qindex) { |
2126 | re = curr_re; | |
2127 | qindex = curr_qindex; | |
d62a17ae | 2128 | } |
f52ed677 | 2129 | } |
5110a0c6 | 2130 | |
f52ed677 | 2131 | if (!re) |
e22e8001 | 2132 | return -1; |
5110a0c6 | 2133 | |
f52ed677 DS |
2134 | /* Invariant: at this point we always have rn->info set. */ |
2135 | if (CHECK_FLAG(rib_dest_from_rnode(rn)->flags, | |
2136 | RIB_ROUTE_QUEUED(qindex))) { | |
d62a17ae | 2137 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2138 | rnode_debug(rn, re->vrf_id, | |
f52ed677 | 2139 | "rn %p is already queued in sub-queue %u", |
d62a17ae | 2140 | (void *)rn, qindex); |
e22e8001 | 2141 | return -1; |
d62a17ae | 2142 | } |
f52ed677 DS |
2143 | |
2144 | SET_FLAG(rib_dest_from_rnode(rn)->flags, RIB_ROUTE_QUEUED(qindex)); | |
2145 | listnode_add(mq->subq[qindex], rn); | |
2146 | route_lock_node(rn); | |
2147 | mq->size++; | |
2148 | ||
2149 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2150 | rnode_debug(rn, re->vrf_id, "queued rn %p into sub-queue %u", | |
2151 | (void *)rn, qindex); | |
e22e8001 SW |
2152 | |
2153 | return 0; | |
4d38fdb4 | 2154 | } |
2155 | ||
e22e8001 | 2156 | static int rib_meta_queue_nhg_add(struct meta_queue *mq, void *data) |
4d38fdb4 | 2157 | { |
e22e8001 SW |
2158 | struct nhg_ctx *ctx = NULL; |
2159 | uint8_t qindex = route_info[ZEBRA_ROUTE_NHG].meta_q_map; | |
fc328ac9 | 2160 | |
e22e8001 SW |
2161 | ctx = (struct nhg_ctx *)data; |
2162 | ||
2163 | if (!ctx) | |
2164 | return -1; | |
4d38fdb4 | 2165 | |
e22e8001 SW |
2166 | listnode_add(mq->subq[qindex], ctx); |
2167 | mq->size++; | |
2168 | ||
2169 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2170 | zlog_debug("NHG Context id=%u queued into sub-queue %u", | |
2171 | ctx->id, qindex); | |
2172 | ||
2173 | return 0; | |
2174 | } | |
2175 | ||
2176 | static int mq_add_handler(void *data, | |
2177 | int (*mq_add_func)(struct meta_queue *mq, void *data)) | |
2178 | { | |
489a9614 | 2179 | if (zrouter.ribq == NULL) { |
e914ccbe | 2180 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2181 | "%s: work_queue does not exist!", __func__); |
e22e8001 | 2182 | return -1; |
d62a17ae | 2183 | } |
2184 | ||
2185 | /* | |
2186 | * The RIB queue should normally be either empty or holding the only | |
2187 | * work_queue_item element. In the latter case this element would | |
2188 | * hold a pointer to the meta queue structure, which must be used to | |
2189 | * actually queue the route nodes to process. So create the MQ | |
2190 | * holder, if necessary, then push the work into it in any case. | |
2191 | * This semantics was introduced after 0.99.9 release. | |
2192 | */ | |
489a9614 | 2193 | if (work_queue_empty(zrouter.ribq)) |
ea45a4e7 | 2194 | work_queue_add(zrouter.ribq, zrouter.mq); |
e96f9203 | 2195 | |
e22e8001 SW |
2196 | return mq_add_func(zrouter.mq, data); |
2197 | } | |
fc328ac9 | 2198 | |
e22e8001 SW |
2199 | /* Add route_node to work queue and schedule processing */ |
2200 | int rib_queue_add(struct route_node *rn) | |
2201 | { | |
2202 | assert(rn); | |
2203 | ||
2204 | /* Pointless to queue a route_node with no RIB entries to add or remove | |
2205 | */ | |
2206 | if (!rnode_to_ribs(rn)) { | |
2207 | zlog_debug("%s: called for route_node (%p, %d) with no ribs", | |
2208 | __func__, (void *)rn, rn->lock); | |
2209 | zlog_backtrace(LOG_DEBUG); | |
2210 | return -1; | |
2211 | } | |
2212 | ||
2213 | return mq_add_handler(rn, &rib_meta_queue_add); | |
2214 | } | |
2215 | ||
2216 | int rib_queue_nhg_add(struct nhg_ctx *ctx) | |
2217 | { | |
2218 | assert(ctx); | |
2219 | ||
2220 | return mq_add_handler(ctx, &rib_meta_queue_nhg_add); | |
4d38fdb4 | 2221 | } |
2222 | ||
5110a0c6 SH |
2223 | /* Create new meta queue. |
2224 | A destructor function doesn't seem to be necessary here. | |
2225 | */ | |
d62a17ae | 2226 | static struct meta_queue *meta_queue_new(void) |
e96f9203 | 2227 | { |
d62a17ae | 2228 | struct meta_queue *new; |
2229 | unsigned i; | |
5110a0c6 | 2230 | |
d62a17ae | 2231 | new = XCALLOC(MTYPE_WORK_QUEUE, sizeof(struct meta_queue)); |
e96f9203 | 2232 | |
d62a17ae | 2233 | for (i = 0; i < MQ_SIZE; i++) { |
2234 | new->subq[i] = list_new(); | |
2235 | assert(new->subq[i]); | |
2236 | } | |
5110a0c6 | 2237 | |
d62a17ae | 2238 | return new; |
e96f9203 DO |
2239 | } |
2240 | ||
d62a17ae | 2241 | void meta_queue_free(struct meta_queue *mq) |
5a8dfcd8 | 2242 | { |
d62a17ae | 2243 | unsigned i; |
5a8dfcd8 | 2244 | |
d62a17ae | 2245 | for (i = 0; i < MQ_SIZE; i++) |
6a154c88 | 2246 | list_delete(&mq->subq[i]); |
5a8dfcd8 | 2247 | |
d62a17ae | 2248 | XFREE(MTYPE_WORK_QUEUE, mq); |
5a8dfcd8 RW |
2249 | } |
2250 | ||
4d38fdb4 | 2251 | /* initialise zebra rib work queue */ |
2561d12e | 2252 | static void rib_queue_init(void) |
4d38fdb4 | 2253 | { |
489a9614 DS |
2254 | if (!(zrouter.ribq = work_queue_new(zrouter.master, |
2255 | "route_node processing"))) { | |
e914ccbe | 2256 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2257 | "%s: could not initialise work queue!", __func__); |
d62a17ae | 2258 | return; |
2259 | } | |
4d38fdb4 | 2260 | |
d62a17ae | 2261 | /* fill in the work queue spec */ |
489a9614 DS |
2262 | zrouter.ribq->spec.workfunc = &meta_queue_process; |
2263 | zrouter.ribq->spec.errorfunc = NULL; | |
46a4e345 | 2264 | zrouter.ribq->spec.completion_func = NULL; |
d62a17ae | 2265 | /* XXX: TODO: These should be runtime configurable via vty */ |
489a9614 DS |
2266 | zrouter.ribq->spec.max_retries = 3; |
2267 | zrouter.ribq->spec.hold = ZEBRA_RIB_PROCESS_HOLD_TIME; | |
2268 | zrouter.ribq->spec.retry = ZEBRA_RIB_PROCESS_RETRY_TIME; | |
d62a17ae | 2269 | |
ea45a4e7 | 2270 | if (!(zrouter.mq = meta_queue_new())) { |
e914ccbe | 2271 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2272 | "%s: could not initialise meta queue!", __func__); |
d62a17ae | 2273 | return; |
2274 | } | |
2275 | return; | |
718e3744 | 2276 | } |
2277 | ||
434434f7 DS |
2278 | rib_dest_t *zebra_rib_create_dest(struct route_node *rn) |
2279 | { | |
2280 | rib_dest_t *dest; | |
2281 | ||
2282 | dest = XCALLOC(MTYPE_RIB_DEST, sizeof(rib_dest_t)); | |
aa57abfb | 2283 | rnh_list_init(&dest->nht); |
434434f7 DS |
2284 | route_lock_node(rn); /* rn route table reference */ |
2285 | rn->info = dest; | |
2286 | dest->rnode = rn; | |
2287 | ||
2288 | return dest; | |
2289 | } | |
2290 | ||
6d691129 PJ |
2291 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2292 | * | |
2293 | * The queue length is bounded by the maximal size of the routing table, | |
2294 | * as a route_node will not be requeued, if already queued. | |
2295 | * | |
f0f77c9a DS |
2296 | * REs are submitted via rib_addnode or rib_delnode which set minimal |
2297 | * state, or static_install_route (when an existing RE is updated) | |
3c0755dc | 2298 | * and then submit route_node to queue for best-path selection later. |
f0f77c9a | 2299 | * Order of add/delete state changes are preserved for any given RE. |
6d691129 | 2300 | * |
f0f77c9a | 2301 | * Deleted REs are reaped during best-path selection. |
6d691129 PJ |
2302 | * |
2303 | * rib_addnode | |
f0f77c9a DS |
2304 | * |-> rib_link or unset ROUTE_ENTRY_REMOVE |->Update kernel with |
2305 | * |-------->| | best RE, if required | |
3c0755dc PJ |
2306 | * | | |
2307 | * static_install->|->rib_addqueue...... -> rib_process | |
2308 | * | | | |
2309 | * |-------->| |-> rib_unlink | |
f0f77c9a DS |
2310 | * |-> set ROUTE_ENTRY_REMOVE | |
2311 | * rib_delnode (RE freed) | |
6d691129 | 2312 | * |
9fd92e3c AS |
2313 | * The 'info' pointer of a route_node points to a rib_dest_t |
2314 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2315 | * dest is created on-demand by rib_link() and is kept around at least | |
2316 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
d62a17ae | 2317 | * |
6d691129 PJ |
2318 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): |
2319 | * | |
2320 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2321 | * - dest attached to route_node: |
2322 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2323 | * - route_node processing queue |
2324 | * - managed by: rib_addqueue, rib_process. | |
2325 | * | |
2326 | */ | |
d62a17ae | 2327 | |
f0f77c9a | 2328 | /* Add RE to head of the route node. */ |
d62a17ae | 2329 | static void rib_link(struct route_node *rn, struct route_entry *re, int process) |
2330 | { | |
d62a17ae | 2331 | rib_dest_t *dest; |
2332 | afi_t afi; | |
2333 | const char *rmap_name; | |
9fd92e3c | 2334 | |
d62a17ae | 2335 | assert(re && rn); |
9fd92e3c | 2336 | |
d62a17ae | 2337 | dest = rib_dest_from_rnode(rn); |
2338 | if (!dest) { | |
2339 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2340 | rnode_debug(rn, re->vrf_id, "rn %p adding dest", rn); | |
7a4bb9c5 | 2341 | |
434434f7 | 2342 | dest = zebra_rib_create_dest(rn); |
d62a17ae | 2343 | } |
2263a412 | 2344 | |
045207e2 | 2345 | re_list_add_head(&dest->routes, re); |
d62a17ae | 2346 | |
2347 | afi = (rn->p.family == AF_INET) | |
2348 | ? AFI_IP | |
2349 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
fe257ae7 DS |
2350 | if (is_zebra_import_table_enabled(afi, re->vrf_id, re->table)) { |
2351 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(re->vrf_id); | |
2352 | ||
d62a17ae | 2353 | rmap_name = zebra_get_import_table_route_map(afi, re->table); |
fe257ae7 | 2354 | zebra_add_import_table_entry(zvrf, rn, re, rmap_name); |
d62a17ae | 2355 | } else if (process) |
2356 | rib_queue_add(rn); | |
2357 | } | |
2358 | ||
7e24fdf3 DS |
2359 | static void rib_addnode(struct route_node *rn, |
2360 | struct route_entry *re, int process) | |
d62a17ae | 2361 | { |
2362 | /* RE node has been un-removed before route-node is processed. | |
2363 | * route_node must hence already be on the queue for processing.. | |
2364 | */ | |
2365 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
2366 | if (IS_ZEBRA_DEBUG_RIB) | |
2367 | rnode_debug(rn, re->vrf_id, "rn %p, un-removed re %p", | |
2368 | (void *)rn, (void *)re); | |
2369 | ||
2370 | UNSET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2371 | return; | |
2372 | } | |
2373 | rib_link(rn, re, process); | |
6d691129 PJ |
2374 | } |
2375 | ||
9fd92e3c AS |
2376 | /* |
2377 | * rib_unlink | |
2378 | * | |
2379 | * Detach a rib structure from a route_node. | |
2380 | * | |
2381 | * Note that a call to rib_unlink() should be followed by a call to | |
2382 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2383 | * longer required to be deleted. | |
2384 | */ | |
d62a17ae | 2385 | void rib_unlink(struct route_node *rn, struct route_entry *re) |
6d691129 | 2386 | { |
d62a17ae | 2387 | rib_dest_t *dest; |
9fd92e3c | 2388 | |
d62a17ae | 2389 | assert(rn && re); |
6d691129 | 2390 | |
d62a17ae | 2391 | if (IS_ZEBRA_DEBUG_RIB) |
2392 | rnode_debug(rn, re->vrf_id, "rn %p, re %p", (void *)rn, | |
2393 | (void *)re); | |
6d691129 | 2394 | |
d62a17ae | 2395 | dest = rib_dest_from_rnode(rn); |
6d691129 | 2396 | |
045207e2 | 2397 | re_list_del(&dest->routes, re); |
7a4bb9c5 | 2398 | |
2eb07de3 DS |
2399 | if (dest->selected_fib == re) |
2400 | dest->selected_fib = NULL; | |
2401 | ||
1d48702e MS |
2402 | if (re->nhe && re->nhe_id) { |
2403 | assert(re->nhe->id == re->nhe_id); | |
2404 | zebra_nhg_decrement_ref(re->nhe); | |
2405 | } else if (re->nhe && re->nhe->nhg.nexthop) | |
c415d895 | 2406 | nexthops_free(re->nhe->nhg.nexthop); |
22bcedb2 | 2407 | |
ee5e8a48 MS |
2408 | nexthops_free(re->fib_ng.nexthop); |
2409 | ||
d62a17ae | 2410 | XFREE(MTYPE_RE, re); |
2411 | } | |
2412 | ||
2413 | void rib_delnode(struct route_node *rn, struct route_entry *re) | |
2414 | { | |
2415 | afi_t afi; | |
2416 | ||
2417 | if (IS_ZEBRA_DEBUG_RIB) | |
2418 | rnode_debug(rn, re->vrf_id, "rn %p, re %p, removing", | |
2419 | (void *)rn, (void *)re); | |
2420 | SET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2421 | ||
2422 | afi = (rn->p.family == AF_INET) | |
2423 | ? AFI_IP | |
2424 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
fe257ae7 DS |
2425 | if (is_zebra_import_table_enabled(afi, re->vrf_id, re->table)) { |
2426 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(re->vrf_id); | |
2427 | ||
2428 | zebra_del_import_table_entry(zvrf, rn, re); | |
d62a17ae | 2429 | /* Just clean up if non main table */ |
2430 | if (IS_ZEBRA_DEBUG_RIB) { | |
2431 | char buf[SRCDEST2STR_BUFFER]; | |
2432 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bd47f3a3 JU |
2433 | zlog_debug("%s(%u):%s: Freeing route rn %p, re %p (%s)", |
2434 | vrf_id_to_name(re->vrf_id), re->vrf_id, buf, | |
2435 | rn, re, zebra_route_string(re->type)); | |
d62a17ae | 2436 | } |
7a4bb9c5 | 2437 | |
d62a17ae | 2438 | rib_unlink(rn, re); |
2439 | } else { | |
2440 | rib_queue_add(rn); | |
2441 | } | |
718e3744 | 2442 | } |
2443 | ||
6d81b590 MS |
2444 | /* |
2445 | * Helper that debugs a single nexthop within a route-entry | |
2446 | */ | |
2447 | static void _route_entry_dump_nh(const struct route_entry *re, | |
2448 | const char *straddr, | |
2449 | const struct nexthop *nexthop) | |
2450 | { | |
2451 | char nhname[PREFIX_STRLEN]; | |
2452 | char backup_str[50]; | |
2453 | char wgt_str[50]; | |
2454 | struct interface *ifp; | |
2455 | struct vrf *vrf = vrf_lookup_by_id(nexthop->vrf_id); | |
2456 | ||
2457 | switch (nexthop->type) { | |
2458 | case NEXTHOP_TYPE_BLACKHOLE: | |
2459 | sprintf(nhname, "Blackhole"); | |
2460 | break; | |
2461 | case NEXTHOP_TYPE_IFINDEX: | |
2462 | ifp = if_lookup_by_index(nexthop->ifindex, nexthop->vrf_id); | |
2463 | sprintf(nhname, "%s", ifp ? ifp->name : "Unknown"); | |
2464 | break; | |
2465 | case NEXTHOP_TYPE_IPV4: | |
2466 | /* fallthrough */ | |
2467 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
2468 | inet_ntop(AF_INET, &nexthop->gate, nhname, INET6_ADDRSTRLEN); | |
2469 | break; | |
2470 | case NEXTHOP_TYPE_IPV6: | |
2471 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
2472 | inet_ntop(AF_INET6, &nexthop->gate, nhname, INET6_ADDRSTRLEN); | |
2473 | break; | |
2474 | } | |
2475 | ||
2476 | backup_str[0] = '\0'; | |
2477 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP)) { | |
2478 | snprintf(backup_str, sizeof(backup_str), "backup %d,", | |
2479 | (int)nexthop->backup_idx); | |
2480 | } | |
2481 | ||
2482 | wgt_str[0] = '\0'; | |
2483 | if (nexthop->weight) | |
2484 | snprintf(wgt_str, sizeof(wgt_str), "wgt %d,", nexthop->weight); | |
2485 | ||
2486 | zlog_debug("%s: %s %s[%u] vrf %s(%u) %s%s with flags %s%s%s%s%s", | |
2487 | straddr, (nexthop->rparent ? " NH" : "NH"), nhname, | |
2488 | nexthop->ifindex, vrf ? vrf->name : "Unknown", | |
2489 | nexthop->vrf_id, | |
2490 | wgt_str, backup_str, | |
2491 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE) | |
2492 | ? "ACTIVE " | |
2493 | : ""), | |
2494 | (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED) | |
2495 | ? "FIB " | |
2496 | : ""), | |
2497 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE) | |
2498 | ? "RECURSIVE " | |
2499 | : ""), | |
2500 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK) | |
2501 | ? "ONLINK " | |
2502 | : ""), | |
2503 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_DUPLICATE) | |
2504 | ? "DUPLICATE " | |
2505 | : "")); | |
2506 | ||
2507 | } | |
2508 | ||
f0f77c9a | 2509 | /* This function dumps the contents of a given RE entry into |
dc95824a DO |
2510 | * standard debug log. Calling function name and IP prefix in |
2511 | * question are passed as 1st and 2nd arguments. | |
2512 | */ | |
d62a17ae | 2513 | void _route_entry_dump(const char *func, union prefixconstptr pp, |
2514 | union prefixconstptr src_pp, | |
2515 | const struct route_entry *re) | |
2516 | { | |
d62a17ae | 2517 | const struct prefix *src_p = src_pp.p; |
2518 | bool is_srcdst = src_p && src_p->prefixlen; | |
2519 | char straddr[PREFIX_STRLEN]; | |
2520 | char srcaddr[PREFIX_STRLEN]; | |
2521 | struct nexthop *nexthop; | |
c479e756 | 2522 | struct vrf *vrf = vrf_lookup_by_id(re->vrf_id); |
6d81b590 | 2523 | struct nexthop_group *nhg; |
d62a17ae | 2524 | |
c479e756 | 2525 | zlog_debug("%s: dumping RE entry %p for %s%s%s vrf %s(%u)", func, |
d62a17ae | 2526 | (const void *)re, prefix2str(pp, straddr, sizeof(straddr)), |
2527 | is_srcdst ? " from " : "", | |
2528 | is_srcdst ? prefix2str(src_pp, srcaddr, sizeof(srcaddr)) | |
2529 | : "", | |
c479e756 | 2530 | VRF_LOGNAME(vrf), re->vrf_id); |
cc54cfee | 2531 | zlog_debug("%s: uptime == %lu, type == %u, instance == %d, table == %d", |
53c16fbe | 2532 | straddr, (unsigned long)re->uptime, re->type, re->instance, |
cc54cfee | 2533 | re->table); |
6d81b590 MS |
2534 | zlog_debug("%s: metric == %u, mtu == %u, distance == %u, flags == %u, status == %u", |
2535 | straddr, re->metric, re->mtu, re->distance, re->flags, | |
2536 | re->status); | |
53c16fbe | 2537 | zlog_debug("%s: nexthop_num == %u, nexthop_active_num == %u", straddr, |
c415d895 MS |
2538 | nexthop_group_nexthop_num(&(re->nhe->nhg)), |
2539 | nexthop_group_active_nexthop_num(&(re->nhe->nhg))); | |
d62a17ae | 2540 | |
6d81b590 MS |
2541 | /* Dump nexthops */ |
2542 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) | |
2543 | _route_entry_dump_nh(re, straddr, nexthop); | |
2d68a0f2 | 2544 | |
6d81b590 MS |
2545 | if (zebra_nhg_get_backup_nhg(re->nhe)) { |
2546 | zlog_debug("%s: backup nexthops:", straddr); | |
2547 | ||
2548 | nhg = zebra_nhg_get_backup_nhg(re->nhe); | |
2549 | for (ALL_NEXTHOPS_PTR(nhg, nexthop)) | |
2550 | _route_entry_dump_nh(re, straddr, nexthop); | |
d62a17ae | 2551 | } |
6d81b590 | 2552 | |
53c16fbe | 2553 | zlog_debug("%s: dump complete", straddr); |
dc95824a DO |
2554 | } |
2555 | ||
6d81b590 MS |
2556 | /* |
2557 | * This is an exported helper to rtm_read() to dump the strange | |
f0f77c9a | 2558 | * RE entry found by rib_lookup_ipv4_route() |
dc95824a | 2559 | */ |
d62a17ae | 2560 | void rib_lookup_and_dump(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
2561 | { | |
2562 | struct route_table *table; | |
2563 | struct route_node *rn; | |
2564 | struct route_entry *re; | |
bd47f3a3 | 2565 | struct vrf *vrf; |
d62a17ae | 2566 | char prefix_buf[INET_ADDRSTRLEN]; |
2567 | ||
bd47f3a3 JU |
2568 | vrf = vrf_lookup_by_id(vrf_id); |
2569 | ||
d62a17ae | 2570 | /* Lookup table. */ |
2571 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
2572 | if (!table) { | |
e914ccbe | 2573 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
bd47f3a3 JU |
2574 | "%s:%s(%u) zebra_vrf_table() returned NULL", __func__, |
2575 | VRF_LOGNAME(vrf), vrf_id); | |
d62a17ae | 2576 | return; |
2577 | } | |
2578 | ||
2579 | /* Scan the RIB table for exactly matching RE entry. */ | |
2580 | rn = route_node_lookup(table, (struct prefix *)p); | |
2581 | ||
2582 | /* No route for this prefix. */ | |
2583 | if (!rn) { | |
bd47f3a3 JU |
2584 | zlog_debug("%s:%s(%u) lookup failed for %s", __func__, |
2585 | VRF_LOGNAME(vrf), vrf_id, | |
d62a17ae | 2586 | prefix2str((struct prefix *)p, prefix_buf, |
2587 | sizeof(prefix_buf))); | |
2588 | return; | |
2589 | } | |
2590 | ||
2591 | /* Unlock node. */ | |
2592 | route_unlock_node(rn); | |
2593 | ||
2594 | /* let's go */ | |
a2addae8 | 2595 | RNODE_FOREACH_RE (rn, re) { |
bd47f3a3 JU |
2596 | zlog_debug("%s:%s(%u) rn %p, re %p: %s, %s", __func__, |
2597 | VRF_LOGNAME(vrf), vrf_id, (void *)rn, (void *)re, | |
d62a17ae | 2598 | (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED) |
2599 | ? "removed" | |
2600 | : "NOT removed"), | |
2601 | (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED) | |
2602 | ? "selected" | |
2603 | : "NOT selected")); | |
2604 | route_entry_dump(p, NULL, re); | |
2605 | } | |
dc95824a DO |
2606 | } |
2607 | ||
20e5ff0a DO |
2608 | /* Check if requested address assignment will fail due to another |
2609 | * route being installed by zebra in FIB already. Take necessary | |
2610 | * actions, if needed: remove such a route from FIB and deSELECT | |
f0f77c9a | 2611 | * corresponding RE entry. Then put affected RN into RIBQ head. |
20e5ff0a | 2612 | */ |
d62a17ae | 2613 | void rib_lookup_and_pushup(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
2614 | { | |
2615 | struct route_table *table; | |
2616 | struct route_node *rn; | |
5f7a4718 | 2617 | rib_dest_t *dest; |
d62a17ae | 2618 | |
2619 | if (NULL == (table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id))) { | |
bd47f3a3 JU |
2620 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); |
2621 | ||
e914ccbe | 2622 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
bd47f3a3 JU |
2623 | "%s:%s(%u) zebra_vrf_table() returned NULL", __func__, |
2624 | VRF_LOGNAME(vrf), vrf_id); | |
d62a17ae | 2625 | return; |
2626 | } | |
2627 | ||
2628 | /* No matches would be the simplest case. */ | |
2629 | if (NULL == (rn = route_node_lookup(table, (struct prefix *)p))) | |
2630 | return; | |
2631 | ||
2632 | /* Unlock node. */ | |
2633 | route_unlock_node(rn); | |
2634 | ||
5f7a4718 | 2635 | dest = rib_dest_from_rnode(rn); |
d62a17ae | 2636 | /* Check all RE entries. In case any changes have to be done, requeue |
2637 | * the RN into RIBQ head. If the routing message about the new connected | |
2638 | * route (generated by the IP address we are going to assign very soon) | |
2639 | * comes before the RIBQ is processed, the new RE entry will join | |
2640 | * RIBQ record already on head. This is necessary for proper | |
2641 | * revalidation | |
2642 | * of the rest of the RE. | |
2643 | */ | |
3cdba47a | 2644 | if (dest->selected_fib) { |
5f7a4718 DS |
2645 | if (IS_ZEBRA_DEBUG_RIB) { |
2646 | char buf[PREFIX_STRLEN]; | |
bd47f3a3 JU |
2647 | struct vrf *vrf = |
2648 | vrf_lookup_by_id(dest->selected_fib->vrf_id); | |
5f7a4718 | 2649 | |
bd47f3a3 JU |
2650 | zlog_debug( |
2651 | "%s(%u):%s: freeing way for connected prefix", | |
2652 | VRF_LOGNAME(vrf), dest->selected_fib->vrf_id, | |
2653 | prefix2str(&rn->p, buf, sizeof(buf))); | |
5f7a4718 | 2654 | route_entry_dump(&rn->p, NULL, dest->selected_fib); |
d62a17ae | 2655 | } |
5f7a4718 | 2656 | rib_uninstall(rn, dest->selected_fib); |
d62a17ae | 2657 | rib_queue_add(rn); |
ade4a886 | 2658 | } |
20e5ff0a DO |
2659 | } |
2660 | ||
1d48702e MS |
2661 | /* |
2662 | * Internal route-add implementation; there are a couple of different public | |
2663 | * signatures. Callers in this path are responsible for the memory they | |
2664 | * allocate: if they allocate a nexthop_group or backup nexthop info, they | |
2665 | * must free those objects. If this returns < 0, an error has occurred and the | |
2666 | * route_entry 're' has not been captured; the caller should free that also. | |
2667 | */ | |
2668 | int rib_add_multipath_nhe(afi_t afi, safi_t safi, struct prefix *p, | |
6d81b590 | 2669 | struct prefix_ipv6 *src_p, struct route_entry *re, |
1d48702e | 2670 | struct nhg_hash_entry *re_nhe) |
718e3744 | 2671 | { |
98cda54a | 2672 | struct nhg_hash_entry *nhe = NULL; |
d62a17ae | 2673 | struct route_table *table; |
2674 | struct route_node *rn; | |
40ecd8e4 | 2675 | struct route_entry *same = NULL; |
d62a17ae | 2676 | int ret = 0; |
b4c034b0 | 2677 | |
1d48702e MS |
2678 | if (!re || !re_nhe) |
2679 | return -1; | |
b4c034b0 | 2680 | |
1f610a1f | 2681 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
05737783 | 2682 | |
d62a17ae | 2683 | /* Lookup table. */ |
c7c0b007 SW |
2684 | table = zebra_vrf_get_table_with_table_id(afi, safi, re->vrf_id, |
2685 | re->table); | |
1d48702e MS |
2686 | if (!table) |
2687 | return -1; | |
cddf391b | 2688 | |
1d48702e MS |
2689 | if (re_nhe->id > 0) { |
2690 | nhe = zebra_nhg_lookup_id(re_nhe->id); | |
98cda54a SW |
2691 | |
2692 | if (!nhe) { | |
2693 | flog_err( | |
2694 | EC_ZEBRA_TABLE_LOOKUP_FAILED, | |
2695 | "Zebra failed to find the nexthop hash entry for id=%u in a route entry", | |
1d48702e MS |
2696 | re_nhe->id); |
2697 | ||
98cda54a SW |
2698 | return -1; |
2699 | } | |
2700 | } else { | |
377e29f7 MS |
2701 | /* Lookup nhe from route information */ |
2702 | nhe = zebra_nhg_rib_find_nhe(re_nhe, afi); | |
98cda54a SW |
2703 | if (!nhe) { |
2704 | char buf[PREFIX_STRLEN] = ""; | |
2705 | char buf2[PREFIX_STRLEN] = ""; | |
2706 | ||
2707 | flog_err( | |
2708 | EC_ZEBRA_TABLE_LOOKUP_FAILED, | |
2709 | "Zebra failed to find or create a nexthop hash entry for %s%s%s", | |
2710 | prefix2str(p, buf, sizeof(buf)), | |
2711 | src_p ? " from " : "", | |
2712 | src_p ? prefix2str(src_p, buf2, sizeof(buf2)) | |
2713 | : ""); | |
2714 | ||
98cda54a SW |
2715 | return -1; |
2716 | } | |
98cda54a SW |
2717 | } |
2718 | ||
4b87c90d SW |
2719 | /* |
2720 | * Attach the re to the nhe's nexthop group. | |
2721 | * | |
2722 | * TODO: This will need to change when we start getting IDs from upper | |
2723 | * level protocols, as the refcnt might be wrong, since it checks | |
2724 | * if old_id != new_id. | |
2725 | */ | |
5463ce26 | 2726 | route_entry_update_nhe(re, nhe); |
98cda54a | 2727 | |
d62a17ae | 2728 | /* Make it sure prefixlen is applied to the prefix. */ |
2729 | apply_mask(p); | |
2730 | if (src_p) | |
2731 | apply_mask_ipv6(src_p); | |
718e3744 | 2732 | |
d62a17ae | 2733 | /* Set default distance by route type. */ |
eea2ef07 | 2734 | if (re->distance == 0) |
0492eea0 | 2735 | re->distance = route_distance(re->type); |
718e3744 | 2736 | |
d62a17ae | 2737 | /* Lookup route node.*/ |
2738 | rn = srcdest_rnode_get(table, p, src_p); | |
718e3744 | 2739 | |
40ecd8e4 DS |
2740 | /* |
2741 | * If same type of route are installed, treat it as a implicit | |
2742 | * withdraw. | |
2743 | * If the user has specified the No route replace semantics | |
2744 | * for the install don't do a route replace. | |
2745 | */ | |
a2addae8 | 2746 | RNODE_FOREACH_RE (rn, same) { |
d62a17ae | 2747 | if (CHECK_FLAG(same->status, ROUTE_ENTRY_REMOVED)) |
2748 | continue; | |
41ec9222 | 2749 | |
eb327fa5 RW |
2750 | if (same->type != re->type) |
2751 | continue; | |
2752 | if (same->instance != re->instance) | |
2753 | continue; | |
996c9314 LB |
2754 | if (same->type == ZEBRA_ROUTE_KERNEL |
2755 | && same->metric != re->metric) | |
eb327fa5 | 2756 | continue; |
40ecd8e4 DS |
2757 | |
2758 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_RR_USE_DISTANCE) && | |
2759 | same->distance != re->distance) | |
2760 | continue; | |
2761 | ||
844b3a87 | 2762 | /* |
40ecd8e4 DS |
2763 | * We should allow duplicate connected routes |
2764 | * because of IPv6 link-local routes and unnumbered | |
2765 | * interfaces on Linux. | |
844b3a87 RW |
2766 | */ |
2767 | if (same->type != ZEBRA_ROUTE_CONNECT) | |
d62a17ae | 2768 | break; |
2769 | } | |
718e3744 | 2770 | |
cf363e1b MS |
2771 | /* If this route is kernel/connected route, notify the dataplane. */ |
2772 | if (RIB_SYSTEM_ROUTE(re)) { | |
2773 | /* Notify dataplane */ | |
2774 | dplane_sys_route_add(rn, re); | |
2775 | } | |
2776 | ||
d62a17ae | 2777 | /* Link new re to node.*/ |
2778 | if (IS_ZEBRA_DEBUG_RIB) { | |
2da33d6b DS |
2779 | rnode_debug(rn, re->vrf_id, |
2780 | "Inserting route rn %p, re %p (%s) existing %p", | |
2781 | rn, re, zebra_route_string(re->type), same); | |
718e3744 | 2782 | |
d62a17ae | 2783 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2784 | route_entry_dump(p, src_p, re); | |
718e3744 | 2785 | } |
6883bf8d DS |
2786 | |
2787 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
d62a17ae | 2788 | rib_addnode(rn, re, 1); |
2789 | ret = 1; | |
6b0655a2 | 2790 | |
d62a17ae | 2791 | /* Free implicit route.*/ |
1d48702e | 2792 | if (same) |
d62a17ae | 2793 | rib_delnode(rn, same); |
718e3744 | 2794 | |
d62a17ae | 2795 | route_unlock_node(rn); |
2796 | return ret; | |
2797 | } | |
2798 | ||
1d48702e MS |
2799 | /* |
2800 | * Add a single route. | |
2801 | */ | |
2802 | int rib_add_multipath(afi_t afi, safi_t safi, struct prefix *p, | |
2803 | struct prefix_ipv6 *src_p, struct route_entry *re, | |
2804 | struct nexthop_group *ng) | |
2805 | { | |
2806 | int ret; | |
377e29f7 | 2807 | struct nhg_hash_entry nhe; |
1d48702e MS |
2808 | |
2809 | if (!re) | |
2810 | return -1; | |
2811 | ||
2812 | /* We either need nexthop(s) or an existing nexthop id */ | |
2813 | if (ng == NULL && re->nhe_id == 0) | |
2814 | return -1; | |
2815 | ||
2816 | /* | |
2817 | * Use a temporary nhe to convey info to the common/main api. | |
2818 | */ | |
377e29f7 | 2819 | zebra_nhe_init(&nhe, afi, (ng ? ng->nexthop : NULL)); |
1d48702e MS |
2820 | if (ng) |
2821 | nhe.nhg.nexthop = ng->nexthop; | |
2822 | else if (re->nhe_id > 0) | |
2823 | nhe.id = re->nhe_id; | |
2824 | ||
2825 | ret = rib_add_multipath_nhe(afi, safi, p, src_p, re, &nhe); | |
2826 | ||
2827 | /* In this path, the callers expect memory to be freed. */ | |
2828 | nexthop_group_delete(&ng); | |
2829 | ||
2830 | /* In error cases, free the route also */ | |
2831 | if (ret < 0) | |
2832 | XFREE(MTYPE_RE, re); | |
2833 | ||
2834 | return ret; | |
2835 | } | |
2836 | ||
d62a17ae | 2837 | void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
d7c0a89a | 2838 | unsigned short instance, int flags, struct prefix *p, |
fd36be7e | 2839 | struct prefix_ipv6 *src_p, const struct nexthop *nh, |
bc541126 SW |
2840 | uint32_t nhe_id, uint32_t table_id, uint32_t metric, |
2841 | uint8_t distance, bool fromkernel) | |
d62a17ae | 2842 | { |
2843 | struct route_table *table; | |
2844 | struct route_node *rn; | |
2845 | struct route_entry *re; | |
2846 | struct route_entry *fib = NULL; | |
2847 | struct route_entry *same = NULL; | |
fd36be7e | 2848 | struct nexthop *rtnh; |
d62a17ae | 2849 | char buf2[INET6_ADDRSTRLEN]; |
5f7a4718 | 2850 | rib_dest_t *dest; |
d62a17ae | 2851 | |
1f610a1f | 2852 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
d62a17ae | 2853 | |
2854 | /* Lookup table. */ | |
c7c0b007 SW |
2855 | table = zebra_vrf_lookup_table_with_table_id(afi, safi, vrf_id, |
2856 | table_id); | |
d62a17ae | 2857 | if (!table) |
2858 | return; | |
2859 | ||
2860 | /* Apply mask. */ | |
2861 | apply_mask(p); | |
2862 | if (src_p) | |
2863 | apply_mask_ipv6(src_p); | |
2864 | ||
2865 | /* Lookup route node. */ | |
2866 | rn = srcdest_rnode_lookup(table, p, src_p); | |
2867 | if (!rn) { | |
2868 | char dst_buf[PREFIX_STRLEN], src_buf[PREFIX_STRLEN]; | |
2869 | ||
2870 | prefix2str(p, dst_buf, sizeof(dst_buf)); | |
2871 | if (src_p && src_p->prefixlen) | |
2872 | prefix2str(src_p, src_buf, sizeof(src_buf)); | |
2873 | else | |
2874 | src_buf[0] = '\0'; | |
2875 | ||
82d7d0e2 DS |
2876 | if (IS_ZEBRA_DEBUG_RIB) { |
2877 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); | |
2878 | ||
2879 | zlog_debug("%s[%d]:%s%s%s doesn't exist in rib", | |
2880 | vrf->name, table_id, dst_buf, | |
d62a17ae | 2881 | (src_buf[0] != '\0') ? " from " : "", |
2882 | src_buf); | |
82d7d0e2 | 2883 | } |
d62a17ae | 2884 | return; |
2885 | } | |
718e3744 | 2886 | |
5f7a4718 DS |
2887 | dest = rib_dest_from_rnode(rn); |
2888 | fib = dest->selected_fib; | |
2889 | ||
d62a17ae | 2890 | /* Lookup same type route. */ |
a2addae8 | 2891 | RNODE_FOREACH_RE (rn, re) { |
d62a17ae | 2892 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
2893 | continue; | |
2894 | ||
d62a17ae | 2895 | if (re->type != type) |
2896 | continue; | |
2897 | if (re->instance != instance) | |
2898 | continue; | |
40ecd8e4 DS |
2899 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_RR_USE_DISTANCE) && |
2900 | distance != re->distance) | |
2901 | continue; | |
2902 | ||
996c9314 | 2903 | if (re->type == ZEBRA_ROUTE_KERNEL && re->metric != metric) |
f19435a8 | 2904 | continue; |
0eb97b86 | 2905 | if (re->type == ZEBRA_ROUTE_CONNECT && |
c415d895 | 2906 | (rtnh = re->nhe->nhg.nexthop) |
fd36be7e DL |
2907 | && rtnh->type == NEXTHOP_TYPE_IFINDEX && nh) { |
2908 | if (rtnh->ifindex != nh->ifindex) | |
d62a17ae | 2909 | continue; |
d62a17ae | 2910 | same = re; |
2911 | break; | |
2912 | } | |
fec211ad | 2913 | |
d62a17ae | 2914 | /* Make sure that the route found has the same gateway. */ |
fec211ad | 2915 | if (nhe_id && re->nhe_id == nhe_id) { |
bc541126 SW |
2916 | same = re; |
2917 | break; | |
fec211ad SW |
2918 | } |
2919 | ||
2920 | if (nh == NULL) { | |
2921 | same = re; | |
2922 | break; | |
2923 | } | |
c415d895 | 2924 | for (ALL_NEXTHOPS(re->nhe->nhg, rtnh)) { |
fec211ad SW |
2925 | /* |
2926 | * No guarantee all kernel send nh with labels | |
2927 | * on delete. | |
2928 | */ | |
2929 | if (nexthop_same_no_labels(rtnh, nh)) { | |
d62a17ae | 2930 | same = re; |
2931 | break; | |
2932 | } | |
d62a17ae | 2933 | } |
fec211ad SW |
2934 | |
2935 | if (same) | |
2936 | break; | |
d62a17ae | 2937 | } |
2938 | /* If same type of route can't be found and this message is from | |
2939 | kernel. */ | |
2940 | if (!same) { | |
5dfeba19 DS |
2941 | /* |
2942 | * In the past(HA!) we could get here because | |
2943 | * we were receiving a route delete from the | |
2944 | * kernel and we're not marking the proto | |
2945 | * as coming from it's appropriate originator. | |
2946 | * Now that we are properly noticing the fact | |
2947 | * that the kernel has deleted our route we | |
2948 | * are not going to get called in this path | |
2949 | * I am going to leave this here because | |
2950 | * this might still work this way on non-linux | |
2951 | * platforms as well as some weird state I have | |
2952 | * not properly thought of yet. | |
2953 | * If we can show that this code path is | |
2954 | * dead then we can remove it. | |
2955 | */ | |
b8faa875 | 2956 | if (fib && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) { |
d62a17ae | 2957 | if (IS_ZEBRA_DEBUG_RIB) { |
2da33d6b DS |
2958 | rnode_debug(rn, vrf_id, |
2959 | "rn %p, re %p (%s) was deleted from kernel, adding", | |
2960 | rn, fib, | |
2961 | zebra_route_string(fib->type)); | |
d62a17ae | 2962 | } |
2963 | if (allow_delete) { | |
677c1dd5 | 2964 | UNSET_FLAG(fib->status, ROUTE_ENTRY_INSTALLED); |
d62a17ae | 2965 | /* Unset flags. */ |
c415d895 | 2966 | for (rtnh = fib->nhe->nhg.nexthop; rtnh; |
fd36be7e DL |
2967 | rtnh = rtnh->next) |
2968 | UNSET_FLAG(rtnh->flags, | |
d62a17ae | 2969 | NEXTHOP_FLAG_FIB); |
2970 | ||
ed216282 DS |
2971 | /* |
2972 | * This is a non FRR route | |
2973 | * as such we should mark | |
2974 | * it as deleted | |
2975 | */ | |
5f7a4718 | 2976 | dest->selected_fib = NULL; |
d62a17ae | 2977 | } else { |
2978 | /* This means someone else, other than Zebra, | |
2979 | * has deleted | |
2980 | * a Zebra router from the kernel. We will add | |
2981 | * it back */ | |
2982 | rib_install_kernel(rn, fib, NULL); | |
2983 | } | |
2984 | } else { | |
2985 | if (IS_ZEBRA_DEBUG_RIB) { | |
fd36be7e | 2986 | if (nh) |
d62a17ae | 2987 | rnode_debug( |
2988 | rn, vrf_id, | |
2989 | "via %s ifindex %d type %d " | |
2990 | "doesn't exist in rib", | |
36228974 | 2991 | inet_ntop(afi2family(afi), |
2992 | &nh->gate, buf2, | |
2993 | sizeof(buf2)), | |
2994 | nh->ifindex, type); | |
d62a17ae | 2995 | else |
2996 | rnode_debug( | |
2997 | rn, vrf_id, | |
fd36be7e DL |
2998 | "type %d doesn't exist in rib", |
2999 | type); | |
d62a17ae | 3000 | } |
3001 | route_unlock_node(rn); | |
3002 | return; | |
3003 | } | |
3004 | } | |
718e3744 | 3005 | |
5dfeba19 | 3006 | if (same) { |
996c9314 LB |
3007 | if (fromkernel && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE) |
3008 | && !allow_delete) { | |
5dfeba19 DS |
3009 | rib_install_kernel(rn, same, NULL); |
3010 | route_unlock_node(rn); | |
3011 | ||
3012 | return; | |
3013 | } | |
6134fd82 | 3014 | |
2b83602b | 3015 | /* Special handling for IPv4 or IPv6 routes sourced from |
3016 | * EVPN - the nexthop (and associated MAC) need to be | |
3017 | * uninstalled if no more refs. | |
3018 | */ | |
90264d64 | 3019 | if (CHECK_FLAG(flags, ZEBRA_FLAG_EVPN_ROUTE)) { |
6134fd82 | 3020 | struct nexthop *tmp_nh; |
3021 | ||
c415d895 | 3022 | for (ALL_NEXTHOPS(re->nhe->nhg, tmp_nh)) { |
6134fd82 | 3023 | struct ipaddr vtep_ip; |
3024 | ||
3025 | memset(&vtep_ip, 0, sizeof(struct ipaddr)); | |
1ec31309 | 3026 | if (afi == AFI_IP) { |
3027 | vtep_ip.ipa_type = IPADDR_V4; | |
3028 | memcpy(&(vtep_ip.ipaddr_v4), | |
3029 | &(tmp_nh->gate.ipv4), | |
3030 | sizeof(struct in_addr)); | |
3031 | } else { | |
3032 | vtep_ip.ipa_type = IPADDR_V6; | |
3033 | memcpy(&(vtep_ip.ipaddr_v6), | |
3034 | &(tmp_nh->gate.ipv6), | |
3035 | sizeof(struct in6_addr)); | |
3036 | } | |
a317a9b9 | 3037 | zebra_vxlan_evpn_vrf_route_del(re->vrf_id, |
6134fd82 | 3038 | &vtep_ip, p); |
3039 | } | |
3040 | } | |
cf363e1b MS |
3041 | |
3042 | /* Notify dplane if system route changes */ | |
3043 | if (RIB_SYSTEM_ROUTE(re)) | |
3044 | dplane_sys_route_del(rn, same); | |
3045 | ||
d62a17ae | 3046 | rib_delnode(rn, same); |
5dfeba19 | 3047 | } |
05737783 | 3048 | |
d62a17ae | 3049 | route_unlock_node(rn); |
3050 | return; | |
3051 | } | |
718e3744 | 3052 | |
718e3744 | 3053 | |
d7c0a89a QY |
3054 | int rib_add(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
3055 | unsigned short instance, int flags, struct prefix *p, | |
3056 | struct prefix_ipv6 *src_p, const struct nexthop *nh, | |
8032b717 SW |
3057 | uint32_t nhe_id, uint32_t table_id, uint32_t metric, uint32_t mtu, |
3058 | uint8_t distance, route_tag_t tag) | |
d62a17ae | 3059 | { |
bbb322f2 SW |
3060 | struct route_entry *re = NULL; |
3061 | struct nexthop *nexthop = NULL; | |
0eb97b86 | 3062 | struct nexthop_group *ng = NULL; |
718e3744 | 3063 | |
66af6845 | 3064 | /* Allocate new route_entry structure. */ |
d62a17ae | 3065 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); |
d62a17ae | 3066 | re->type = type; |
3067 | re->instance = instance; | |
3068 | re->distance = distance; | |
3069 | re->flags = flags; | |
3070 | re->metric = metric; | |
3071 | re->mtu = mtu; | |
3072 | re->table = table_id; | |
3073 | re->vrf_id = vrf_id; | |
98572489 | 3074 | re->uptime = monotime(NULL); |
4e40b6d6 | 3075 | re->tag = tag; |
bbb322f2 SW |
3076 | re->nhe_id = nhe_id; |
3077 | ||
0eb97b86 MS |
3078 | /* If the owner of the route supplies a shared nexthop-group id, |
3079 | * we'll use that. Otherwise, pass the nexthop along directly. | |
3080 | */ | |
e22e8001 | 3081 | if (!nhe_id) { |
0eb97b86 | 3082 | ng = nexthop_group_new(); |
d62a17ae | 3083 | |
e22e8001 SW |
3084 | /* Add nexthop. */ |
3085 | nexthop = nexthop_new(); | |
3086 | *nexthop = *nh; | |
0eb97b86 | 3087 | nexthop_group_add_sorted(ng, nexthop); |
e22e8001 | 3088 | } |
718e3744 | 3089 | |
0eb97b86 | 3090 | return rib_add_multipath(afi, safi, p, src_p, re, ng); |
718e3744 | 3091 | } |
3092 | ||
2a99ab95 SW |
3093 | static const char *rib_update_event2str(rib_update_event_t event) |
3094 | { | |
3095 | const char *ret = "UNKNOWN"; | |
3096 | ||
3097 | switch (event) { | |
3098 | case RIB_UPDATE_KERNEL: | |
3099 | ret = "RIB_UPDATE_KERNEL"; | |
3100 | break; | |
3101 | case RIB_UPDATE_RMAP_CHANGE: | |
3102 | ret = "RIB_UPDATE_RMAP_CHANGE"; | |
3103 | break; | |
3104 | case RIB_UPDATE_OTHER: | |
3105 | ret = "RIB_UPDATE_OTHER"; | |
3106 | break; | |
3107 | case RIB_UPDATE_MAX: | |
3108 | break; | |
3109 | } | |
3110 | ||
3111 | return ret; | |
3112 | } | |
3113 | ||
3114 | ||
3115 | /* Schedule route nodes to be processed if they match the type */ | |
3116 | static void rib_update_route_node(struct route_node *rn, int type) | |
3117 | { | |
3118 | struct route_entry *re, *next; | |
3119 | bool re_changed = false; | |
3120 | ||
3121 | RNODE_FOREACH_RE_SAFE (rn, re, next) { | |
3122 | if (type == ZEBRA_ROUTE_ALL || type == re->type) { | |
3123 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
3124 | re_changed = true; | |
3125 | } | |
3126 | } | |
3127 | ||
3128 | if (re_changed) | |
3129 | rib_queue_add(rn); | |
3130 | } | |
3131 | ||
1c848137 | 3132 | /* Schedule routes of a particular table (address-family) based on event. */ |
d5b8c216 | 3133 | void rib_update_table(struct route_table *table, rib_update_event_t event) |
d62a17ae | 3134 | { |
3135 | struct route_node *rn; | |
2a99ab95 SW |
3136 | |
3137 | if (IS_ZEBRA_DEBUG_EVENT) { | |
3138 | struct zebra_vrf *zvrf; | |
3139 | struct vrf *vrf; | |
3140 | ||
3141 | zvrf = table->info ? ((rib_table_info_t *)table->info)->zvrf | |
3142 | : NULL; | |
3143 | vrf = zvrf ? zvrf->vrf : NULL; | |
3144 | ||
3145 | zlog_debug("%s: %s VRF %s Table %u event %s", __func__, | |
3146 | table->info ? afi2str( | |
3147 | ((rib_table_info_t *)table->info)->afi) | |
3148 | : "Unknown", | |
bd47f3a3 | 3149 | VRF_LOGNAME(vrf), zvrf ? zvrf->table_id : 0, |
2a99ab95 SW |
3150 | rib_update_event2str(event)); |
3151 | } | |
d62a17ae | 3152 | |
3153 | /* Walk all routes and queue for processing, if appropriate for | |
3154 | * the trigger event. | |
3155 | */ | |
3156 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { | |
1ca60f2c DS |
3157 | /* |
3158 | * If we are looking at a route node and the node | |
3159 | * has already been queued we don't | |
3160 | * need to queue it up again | |
3161 | */ | |
2a99ab95 SW |
3162 | if (rn->info |
3163 | && CHECK_FLAG(rib_dest_from_rnode(rn)->flags, | |
3164 | RIB_ROUTE_ANY_QUEUED)) | |
1ca60f2c | 3165 | continue; |
2a99ab95 | 3166 | |
d62a17ae | 3167 | switch (event) { |
2a99ab95 SW |
3168 | case RIB_UPDATE_KERNEL: |
3169 | rib_update_route_node(rn, ZEBRA_ROUTE_KERNEL); | |
3170 | break; | |
d62a17ae | 3171 | case RIB_UPDATE_RMAP_CHANGE: |
3172 | case RIB_UPDATE_OTHER: | |
2a99ab95 | 3173 | rib_update_route_node(rn, ZEBRA_ROUTE_ALL); |
d62a17ae | 3174 | break; |
d62a17ae | 3175 | default: |
3176 | break; | |
3177 | } | |
3178 | } | |
b84c7253 | 3179 | } |
3180 | ||
2a99ab95 | 3181 | static void rib_update_handle_vrf(vrf_id_t vrf_id, rib_update_event_t event) |
718e3744 | 3182 | { |
d62a17ae | 3183 | struct route_table *table; |
1c848137 | 3184 | |
2a99ab95 SW |
3185 | if (IS_ZEBRA_DEBUG_EVENT) |
3186 | zlog_debug("%s: Handling VRF %s event %s", __func__, | |
3187 | vrf_id_to_name(vrf_id), rib_update_event2str(event)); | |
3188 | ||
d62a17ae | 3189 | /* Process routes of interested address-families. */ |
3190 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
2a99ab95 | 3191 | if (table) |
d62a17ae | 3192 | rib_update_table(table, event); |
718e3744 | 3193 | |
d62a17ae | 3194 | table = zebra_vrf_table(AFI_IP6, SAFI_UNICAST, vrf_id); |
2a99ab95 | 3195 | if (table) |
d62a17ae | 3196 | rib_update_table(table, event); |
2a99ab95 SW |
3197 | } |
3198 | ||
3199 | static void rib_update_handle_vrf_all(rib_update_event_t event) | |
3200 | { | |
3201 | struct zebra_router_table *zrt; | |
3202 | ||
3203 | if (IS_ZEBRA_DEBUG_EVENT) | |
3204 | zlog_debug("%s: Handling VRF (ALL) event %s", __func__, | |
3205 | rib_update_event2str(event)); | |
3206 | ||
3207 | /* Just iterate over all the route tables, rather than vrf lookups */ | |
3208 | RB_FOREACH (zrt, zebra_router_table_head, &zrouter.tables) | |
3209 | rib_update_table(zrt->table, event); | |
3210 | } | |
3211 | ||
3212 | struct rib_update_ctx { | |
3213 | rib_update_event_t event; | |
3214 | bool vrf_all; | |
3215 | vrf_id_t vrf_id; | |
3216 | }; | |
3217 | ||
3218 | static struct rib_update_ctx *rib_update_ctx_init(vrf_id_t vrf_id, | |
3219 | rib_update_event_t event) | |
3220 | { | |
3221 | struct rib_update_ctx *ctx; | |
3222 | ||
3223 | ctx = XCALLOC(MTYPE_RIB_UPDATE_CTX, sizeof(struct rib_update_ctx)); | |
3224 | ||
3225 | ctx->event = event; | |
3226 | ctx->vrf_id = vrf_id; | |
3227 | ||
3228 | return ctx; | |
3229 | } | |
3230 | ||
3231 | static void rib_update_ctx_fini(struct rib_update_ctx **ctx) | |
3232 | { | |
3233 | XFREE(MTYPE_RIB_UPDATE_CTX, *ctx); | |
2a99ab95 SW |
3234 | } |
3235 | ||
3236 | static int rib_update_handler(struct thread *thread) | |
3237 | { | |
3238 | struct rib_update_ctx *ctx; | |
3239 | ||
3240 | ctx = THREAD_ARG(thread); | |
3241 | ||
3242 | if (ctx->vrf_all) | |
3243 | rib_update_handle_vrf_all(ctx->event); | |
3244 | else | |
3245 | rib_update_handle_vrf(ctx->vrf_id, ctx->event); | |
3246 | ||
3247 | rib_update_ctx_fini(&ctx); | |
3248 | ||
3249 | return 0; | |
3250 | } | |
3251 | ||
3252 | /* | |
3253 | * Thread list to ensure we don't schedule a ton of events | |
3254 | * if interfaces are flapping for instance. | |
3255 | */ | |
3256 | static struct thread *t_rib_update_threads[RIB_UPDATE_MAX]; | |
3257 | ||
3258 | /* Schedule a RIB update event for specific vrf */ | |
3259 | void rib_update_vrf(vrf_id_t vrf_id, rib_update_event_t event) | |
3260 | { | |
3261 | struct rib_update_ctx *ctx; | |
3262 | ||
3263 | ctx = rib_update_ctx_init(vrf_id, event); | |
3264 | ||
3265 | /* Don't worry about making sure multiple rib updates for specific vrf | |
3266 | * are scheduled at once for now. If it becomes a problem, we can use a | |
3267 | * lookup of some sort to keep track of running threads via t_vrf_id | |
3268 | * like how we are doing it in t_rib_update_threads[]. | |
3269 | */ | |
3270 | thread_add_event(zrouter.master, rib_update_handler, ctx, 0, NULL); | |
3271 | ||
3272 | if (IS_ZEBRA_DEBUG_EVENT) | |
3273 | zlog_debug("%s: Scheduled VRF %s, event %s", __func__, | |
3274 | vrf_id_to_name(ctx->vrf_id), | |
3275 | rib_update_event2str(event)); | |
3276 | } | |
3277 | ||
3278 | /* Schedule a RIB update event for all vrfs */ | |
3279 | void rib_update(rib_update_event_t event) | |
3280 | { | |
3281 | struct rib_update_ctx *ctx; | |
3282 | ||
3283 | ctx = rib_update_ctx_init(0, event); | |
3284 | ||
3285 | ctx->vrf_all = true; | |
3286 | ||
3287 | if (!thread_add_event(zrouter.master, rib_update_handler, ctx, 0, | |
3288 | &t_rib_update_threads[event])) | |
3289 | rib_update_ctx_fini(&ctx); /* Already scheduled */ | |
3290 | else if (IS_ZEBRA_DEBUG_EVENT) | |
05267678 | 3291 | zlog_debug("%s: Scheduled VRF (ALL), event %s", __func__, |
2a99ab95 | 3292 | rib_update_event2str(event)); |
718e3744 | 3293 | } |
3294 | ||
718e3744 | 3295 | /* Delete self installed routes after zebra is relaunched. */ |
95a29032 | 3296 | void rib_sweep_table(struct route_table *table) |
d62a17ae | 3297 | { |
3298 | struct route_node *rn; | |
3299 | struct route_entry *re; | |
3300 | struct route_entry *next; | |
915902cb | 3301 | struct nexthop *nexthop; |
d62a17ae | 3302 | |
915902cb DS |
3303 | if (!table) |
3304 | return; | |
d62a17ae | 3305 | |
6d81b590 MS |
3306 | if (IS_ZEBRA_DEBUG_RIB) |
3307 | zlog_debug("%s: starting", __func__); | |
3308 | ||
915902cb | 3309 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
a2addae8 | 3310 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d4644d41 | 3311 | |
915902cb DS |
3312 | if (IS_ZEBRA_DEBUG_RIB) |
3313 | route_entry_dump(&rn->p, NULL, re); | |
3314 | ||
3315 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
3316 | continue; | |
3317 | ||
3318 | if (!CHECK_FLAG(re->flags, ZEBRA_FLAG_SELFROUTE)) | |
3319 | continue; | |
3320 | ||
d4644d41 DS |
3321 | /* |
3322 | * If routes are older than startup_time then | |
3323 | * we know we read them in from the kernel. | |
3324 | * As such we can safely remove them. | |
3325 | */ | |
3326 | if (zrouter.startup_time < re->uptime) | |
3327 | continue; | |
3328 | ||
915902cb DS |
3329 | /* |
3330 | * So we are starting up and have received | |
3331 | * routes from the kernel that we have installed | |
3332 | * from a previous run of zebra but not cleaned | |
3333 | * up ( say a kill -9 ) | |
3334 | * But since we haven't actually installed | |
3335 | * them yet( we received them from the kernel ) | |
3336 | * we don't think they are active. | |
3337 | * So let's pretend they are active to actually | |
3338 | * remove them. | |
3339 | * In all honesty I'm not sure if we should | |
3340 | * mark them as active when we receive them | |
3341 | * This is startup only so probably ok. | |
3342 | * | |
3343 | * If we ever decide to move rib_sweep_table | |
3344 | * to a different spot (ie startup ) | |
3345 | * this decision needs to be revisited | |
3346 | */ | |
677c1dd5 | 3347 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
c415d895 | 3348 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
915902cb DS |
3349 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
3350 | ||
0c555cc6 DS |
3351 | rib_uninstall_kernel(rn, re); |
3352 | rib_delnode(rn, re); | |
915902cb DS |
3353 | } |
3354 | } | |
6d81b590 MS |
3355 | |
3356 | if (IS_ZEBRA_DEBUG_RIB) | |
3357 | zlog_debug("%s: ends", __func__); | |
718e3744 | 3358 | } |
3359 | ||
3360 | /* Sweep all RIB tables. */ | |
d4644d41 | 3361 | int rib_sweep_route(struct thread *t) |
718e3744 | 3362 | { |
d62a17ae | 3363 | struct vrf *vrf; |
3364 | struct zebra_vrf *zvrf; | |
78104b9b | 3365 | |
a2addae8 | 3366 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
915902cb DS |
3367 | if ((zvrf = vrf->info) == NULL) |
3368 | continue; | |
3369 | ||
d62a17ae | 3370 | rib_sweep_table(zvrf->table[AFI_IP][SAFI_UNICAST]); |
3371 | rib_sweep_table(zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3372 | } | |
95a29032 | 3373 | |
89272910 | 3374 | zebra_router_sweep_route(); |
38e40db1 | 3375 | zebra_router_sweep_nhgs(); |
d4644d41 DS |
3376 | |
3377 | return 0; | |
718e3744 | 3378 | } |
2ea1ab1c VT |
3379 | |
3380 | /* Remove specific by protocol routes from 'table'. */ | |
d7c0a89a | 3381 | unsigned long rib_score_proto_table(uint8_t proto, unsigned short instance, |
47a08aa9 | 3382 | struct route_table *table) |
d62a17ae | 3383 | { |
3384 | struct route_node *rn; | |
3385 | struct route_entry *re; | |
3386 | struct route_entry *next; | |
3387 | unsigned long n = 0; | |
3388 | ||
3389 | if (table) | |
3390 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) | |
a2addae8 | 3391 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 3392 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
3393 | continue; | |
3394 | if (re->type == proto | |
3395 | && re->instance == instance) { | |
3396 | rib_delnode(rn, re); | |
3397 | n++; | |
3398 | } | |
3399 | } | |
3400 | return n; | |
2ea1ab1c VT |
3401 | } |
3402 | ||
3403 | /* Remove specific by protocol routes. */ | |
d7c0a89a | 3404 | unsigned long rib_score_proto(uint8_t proto, unsigned short instance) |
2ea1ab1c | 3405 | { |
d62a17ae | 3406 | struct vrf *vrf; |
3407 | struct zebra_vrf *zvrf; | |
d8612e65 | 3408 | struct other_route_table *ort; |
d62a17ae | 3409 | unsigned long cnt = 0; |
78104b9b | 3410 | |
d8612e65 DS |
3411 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
3412 | zvrf = vrf->info; | |
3413 | if (!zvrf) | |
3414 | continue; | |
78104b9b | 3415 | |
d8612e65 DS |
3416 | cnt += rib_score_proto_table(proto, instance, |
3417 | zvrf->table[AFI_IP][SAFI_UNICAST]) | |
3418 | + rib_score_proto_table( | |
3419 | proto, instance, | |
3420 | zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3421 | ||
81fddbe7 | 3422 | frr_each(otable, &zvrf->other_tables, ort) cnt += |
d8612e65 DS |
3423 | rib_score_proto_table(proto, instance, ort->table); |
3424 | } | |
47a08aa9 | 3425 | |
d62a17ae | 3426 | return cnt; |
2ea1ab1c VT |
3427 | } |
3428 | ||
718e3744 | 3429 | /* Close RIB and clean up kernel routes. */ |
d62a17ae | 3430 | void rib_close_table(struct route_table *table) |
718e3744 | 3431 | { |
d62a17ae | 3432 | struct route_node *rn; |
1e9f448f | 3433 | rib_table_info_t *info; |
5f7a4718 | 3434 | rib_dest_t *dest; |
718e3744 | 3435 | |
1e9f448f DS |
3436 | if (!table) |
3437 | return; | |
9fd92e3c | 3438 | |
6ca30e9e | 3439 | info = route_table_get_info(table); |
5adc2528 | 3440 | |
5f7a4718 DS |
3441 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
3442 | dest = rib_dest_from_rnode(rn); | |
1e9f448f | 3443 | |
5f7a4718 | 3444 | if (dest && dest->selected_fib) { |
1e9f448f DS |
3445 | if (info->safi == SAFI_UNICAST) |
3446 | hook_call(rib_update, rn, NULL); | |
3447 | ||
3cdba47a DS |
3448 | rib_uninstall_kernel(rn, dest->selected_fib); |
3449 | dest->selected_fib = NULL; | |
1e9f448f | 3450 | } |
5f7a4718 | 3451 | } |
718e3744 | 3452 | } |
3453 | ||
9bd9717b MS |
3454 | /* |
3455 | * Handler for async dataplane results after a pseudowire installation | |
3456 | */ | |
3457 | static int handle_pw_result(struct zebra_dplane_ctx *ctx) | |
3458 | { | |
9bd9717b MS |
3459 | struct zebra_pw *pw; |
3460 | struct zebra_vrf *vrf; | |
3461 | ||
3462 | /* The pseudowire code assumes success - we act on an error | |
3463 | * result for installation attempts here. | |
3464 | */ | |
3465 | if (dplane_ctx_get_op(ctx) != DPLANE_OP_PW_INSTALL) | |
3466 | goto done; | |
3467 | ||
3468 | if (dplane_ctx_get_status(ctx) != ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
3469 | vrf = zebra_vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); | |
7c7ef4a8 | 3470 | pw = zebra_pw_find(vrf, dplane_ctx_get_ifname(ctx)); |
9bd9717b MS |
3471 | if (pw) |
3472 | zebra_pw_install_failure(pw); | |
3473 | } | |
3474 | ||
3475 | done: | |
3476 | ||
9f2d0354 | 3477 | return 0; |
9bd9717b MS |
3478 | } |
3479 | ||
3480 | ||
7cdb1a84 | 3481 | /* |
d37f4d6c MS |
3482 | * Handle results from the dataplane system. Dequeue update context |
3483 | * structs, dispatch to appropriate internal handlers. | |
7cdb1a84 MS |
3484 | */ |
3485 | static int rib_process_dplane_results(struct thread *thread) | |
3486 | { | |
25779064 | 3487 | struct zebra_dplane_ctx *ctx; |
4c206c8f | 3488 | struct dplane_ctx_q ctxlist; |
2fc69f03 | 3489 | bool shut_p = false; |
4c206c8f MS |
3490 | |
3491 | /* Dequeue a list of completed updates with one lock/unlock cycle */ | |
7cdb1a84 MS |
3492 | |
3493 | do { | |
4c206c8f MS |
3494 | TAILQ_INIT(&ctxlist); |
3495 | ||
7cdb1a84 | 3496 | /* Take lock controlling queue of results */ |
00dffa8c | 3497 | frr_with_mutex(&dplane_mutex) { |
d37f4d6c | 3498 | /* Dequeue list of context structs */ |
4c206c8f | 3499 | dplane_ctx_list_append(&ctxlist, &rib_dplane_q); |
7cdb1a84 | 3500 | } |
7cdb1a84 | 3501 | |
4c206c8f MS |
3502 | /* Dequeue context block */ |
3503 | ctx = dplane_ctx_dequeue(&ctxlist); | |
3504 | ||
3505 | /* If we've emptied the results queue, we're done */ | |
3506 | if (ctx == NULL) | |
7cdb1a84 | 3507 | break; |
7cdb1a84 | 3508 | |
2fc69f03 MS |
3509 | /* If zebra is shutting down, avoid processing results, |
3510 | * just drain the results queue. | |
3511 | */ | |
3512 | shut_p = atomic_load_explicit(&zrouter.in_shutdown, | |
3513 | memory_order_relaxed); | |
3514 | if (shut_p) { | |
3515 | while (ctx) { | |
3516 | dplane_ctx_fini(&ctx); | |
3517 | ||
3518 | ctx = dplane_ctx_dequeue(&ctxlist); | |
3519 | } | |
3520 | ||
3521 | continue; | |
3522 | } | |
3523 | ||
4c206c8f | 3524 | while (ctx) { |
d37f4d6c MS |
3525 | switch (dplane_ctx_get_op(ctx)) { |
3526 | case DPLANE_OP_ROUTE_INSTALL: | |
3527 | case DPLANE_OP_ROUTE_UPDATE: | |
3528 | case DPLANE_OP_ROUTE_DELETE: | |
188a00e0 MS |
3529 | { |
3530 | /* Bit of special case for route updates | |
3531 | * that were generated by async notifications: | |
3532 | * we don't want to continue processing these | |
3533 | * in the rib. | |
3534 | */ | |
3535 | if (dplane_ctx_get_notif_provider(ctx) == 0) | |
3536 | rib_process_result(ctx); | |
3537 | else | |
3538 | dplane_ctx_fini(&ctx); | |
3539 | } | |
3540 | break; | |
d37f4d6c | 3541 | |
54818e3b MS |
3542 | case DPLANE_OP_ROUTE_NOTIFY: |
3543 | rib_process_dplane_notify(ctx); | |
d37f4d6c MS |
3544 | break; |
3545 | ||
9865e1c3 SW |
3546 | case DPLANE_OP_NH_INSTALL: |
3547 | case DPLANE_OP_NH_UPDATE: | |
3548 | case DPLANE_OP_NH_DELETE: | |
3549 | zebra_nhg_dplane_result(ctx); | |
3550 | break; | |
3551 | ||
d37f4d6c MS |
3552 | case DPLANE_OP_LSP_INSTALL: |
3553 | case DPLANE_OP_LSP_UPDATE: | |
3554 | case DPLANE_OP_LSP_DELETE: | |
188a00e0 MS |
3555 | { |
3556 | /* Bit of special case for LSP updates | |
3557 | * that were generated by async notifications: | |
3558 | * we don't want to continue processing these. | |
3559 | */ | |
3560 | if (dplane_ctx_get_notif_provider(ctx) == 0) | |
3561 | zebra_mpls_lsp_dplane_result(ctx); | |
3562 | else | |
3563 | dplane_ctx_fini(&ctx); | |
3564 | } | |
3565 | break; | |
d37f4d6c | 3566 | |
104e3ad9 MS |
3567 | case DPLANE_OP_LSP_NOTIFY: |
3568 | zebra_mpls_process_dplane_notify(ctx); | |
d37f4d6c MS |
3569 | break; |
3570 | ||
9bd9717b MS |
3571 | case DPLANE_OP_PW_INSTALL: |
3572 | case DPLANE_OP_PW_UNINSTALL: | |
3573 | handle_pw_result(ctx); | |
3574 | break; | |
3575 | ||
cf363e1b MS |
3576 | case DPLANE_OP_SYS_ROUTE_ADD: |
3577 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
3578 | /* No further processing in zebra for these. */ | |
3579 | dplane_ctx_fini(&ctx); | |
3580 | break; | |
3581 | ||
036d93c0 MS |
3582 | case DPLANE_OP_MAC_INSTALL: |
3583 | case DPLANE_OP_MAC_DELETE: | |
3584 | zebra_vxlan_handle_result(ctx); | |
3585 | break; | |
3586 | ||
931fa60c MS |
3587 | /* Some op codes not handled here */ |
3588 | case DPLANE_OP_ADDR_INSTALL: | |
3589 | case DPLANE_OP_ADDR_UNINSTALL: | |
3590 | case DPLANE_OP_NEIGH_INSTALL: | |
3591 | case DPLANE_OP_NEIGH_UPDATE: | |
3592 | case DPLANE_OP_NEIGH_DELETE: | |
0bbd4ff4 MS |
3593 | case DPLANE_OP_VTEP_ADD: |
3594 | case DPLANE_OP_VTEP_DELETE: | |
931fa60c | 3595 | case DPLANE_OP_NONE: |
d37f4d6c MS |
3596 | /* Don't expect this: just return the struct? */ |
3597 | dplane_ctx_fini(&ctx); | |
3598 | break; | |
931fa60c | 3599 | |
d37f4d6c | 3600 | } /* Dispatch by op code */ |
4c206c8f MS |
3601 | |
3602 | ctx = dplane_ctx_dequeue(&ctxlist); | |
3603 | } | |
3604 | ||
5709131c | 3605 | } while (1); |
7cdb1a84 | 3606 | |
5709131c | 3607 | return 0; |
7cdb1a84 MS |
3608 | } |
3609 | ||
3610 | /* | |
3611 | * Results are returned from the dataplane subsystem, in the context of | |
1bcea841 | 3612 | * the dataplane pthread. We enqueue the results here for processing by |
7cdb1a84 MS |
3613 | * the main thread later. |
3614 | */ | |
4c206c8f | 3615 | static int rib_dplane_results(struct dplane_ctx_q *ctxlist) |
7cdb1a84 MS |
3616 | { |
3617 | /* Take lock controlling queue of results */ | |
00dffa8c | 3618 | frr_with_mutex(&dplane_mutex) { |
4c206c8f MS |
3619 | /* Enqueue context blocks */ |
3620 | dplane_ctx_list_append(&rib_dplane_q, ctxlist); | |
7cdb1a84 | 3621 | } |
7cdb1a84 | 3622 | |
4c206c8f | 3623 | /* Ensure event is signalled to zebra main pthread */ |
3801e764 | 3624 | thread_add_event(zrouter.master, rib_process_dplane_results, NULL, 0, |
7cdb1a84 MS |
3625 | &t_dplane); |
3626 | ||
5709131c | 3627 | return 0; |
7cdb1a84 MS |
3628 | } |
3629 | ||
eaa2716d SW |
3630 | /* |
3631 | * Ensure there are no empty slots in the route_info array. | |
3632 | * Every route type in zebra should be present there. | |
3633 | */ | |
3634 | static void check_route_info(void) | |
3635 | { | |
3636 | int len = array_size(route_info); | |
3637 | ||
3638 | /* | |
3639 | * ZEBRA_ROUTE_SYSTEM is special cased since | |
3640 | * its key is 0 anyway. | |
3641 | * | |
3642 | * ZEBRA_ROUTE_ALL is also ignored. | |
3643 | */ | |
3644 | for (int i = 0; i < len; i++) { | |
3645 | if (i == ZEBRA_ROUTE_SYSTEM || i == ZEBRA_ROUTE_ALL) | |
3646 | continue; | |
3647 | assert(route_info[i].key); | |
8dc7a759 | 3648 | assert(route_info[i].meta_q_map < MQ_SIZE); |
eaa2716d SW |
3649 | } |
3650 | } | |
3651 | ||
718e3744 | 3652 | /* Routing information base initialize. */ |
d62a17ae | 3653 | void rib_init(void) |
718e3744 | 3654 | { |
eaa2716d SW |
3655 | check_route_info(); |
3656 | ||
2561d12e | 3657 | rib_queue_init(); |
7cdb1a84 MS |
3658 | |
3659 | /* Init dataplane, and register for results */ | |
3660 | pthread_mutex_init(&dplane_mutex, NULL); | |
3661 | TAILQ_INIT(&rib_dplane_q); | |
4c206c8f | 3662 | zebra_dplane_init(rib_dplane_results); |
718e3744 | 3663 | } |
0915bb0c AS |
3664 | |
3665 | /* | |
3666 | * vrf_id_get_next | |
3667 | * | |
3668 | * Get the first vrf id that is greater than the given vrf id if any. | |
3669 | * | |
2951a7a4 | 3670 | * Returns true if a vrf id was found, false otherwise. |
0915bb0c | 3671 | */ |
d62a17ae | 3672 | static inline int vrf_id_get_next(vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 3673 | { |
d62a17ae | 3674 | struct vrf *vrf; |
b72ede27 | 3675 | |
d62a17ae | 3676 | vrf = vrf_lookup_by_id(vrf_id); |
3677 | if (vrf) { | |
3678 | vrf = RB_NEXT(vrf_id_head, vrf); | |
3679 | if (vrf) { | |
3680 | *next_id_p = vrf->vrf_id; | |
3681 | return 1; | |
3682 | } | |
3683 | } | |
0915bb0c | 3684 | |
d62a17ae | 3685 | return 0; |
0915bb0c AS |
3686 | } |
3687 | ||
3688 | /* | |
3689 | * rib_tables_iter_next | |
3690 | * | |
3691 | * Returns the next table in the iteration. | |
3692 | */ | |
d62a17ae | 3693 | struct route_table *rib_tables_iter_next(rib_tables_iter_t *iter) |
3694 | { | |
3695 | struct route_table *table; | |
3696 | ||
3697 | /* | |
3698 | * Array that helps us go over all AFI/SAFI combinations via one | |
3699 | * index. | |
3700 | */ | |
2b64873d | 3701 | static const struct { |
d62a17ae | 3702 | afi_t afi; |
3703 | safi_t safi; | |
3704 | } afi_safis[] = { | |
3705 | {AFI_IP, SAFI_UNICAST}, {AFI_IP, SAFI_MULTICAST}, | |
3706 | {AFI_IP, SAFI_LABELED_UNICAST}, {AFI_IP6, SAFI_UNICAST}, | |
3707 | {AFI_IP6, SAFI_MULTICAST}, {AFI_IP6, SAFI_LABELED_UNICAST}, | |
3708 | }; | |
3709 | ||
3710 | table = NULL; | |
3711 | ||
3712 | switch (iter->state) { | |
3713 | ||
3714 | case RIB_TABLES_ITER_S_INIT: | |
3715 | iter->vrf_id = VRF_DEFAULT; | |
3716 | iter->afi_safi_ix = -1; | |
3717 | ||
3718 | /* Fall through */ | |
3719 | ||
3720 | case RIB_TABLES_ITER_S_ITERATING: | |
3721 | iter->afi_safi_ix++; | |
3722 | while (1) { | |
3723 | ||
3724 | while (iter->afi_safi_ix | |
7e3a1ec7 | 3725 | < (int)array_size(afi_safis)) { |
d62a17ae | 3726 | table = zebra_vrf_table( |
3727 | afi_safis[iter->afi_safi_ix].afi, | |
3728 | afi_safis[iter->afi_safi_ix].safi, | |
3729 | iter->vrf_id); | |
3730 | if (table) | |
3731 | break; | |
3732 | ||
3733 | iter->afi_safi_ix++; | |
3734 | } | |
3735 | ||
3736 | /* | |
3737 | * Found another table in this vrf. | |
3738 | */ | |
3739 | if (table) | |
3740 | break; | |
3741 | ||
3742 | /* | |
3743 | * Done with all tables in the current vrf, go to the | |
3744 | * next | |
3745 | * one. | |
3746 | */ | |
3747 | if (!vrf_id_get_next(iter->vrf_id, &iter->vrf_id)) | |
3748 | break; | |
3749 | ||
3750 | iter->afi_safi_ix = 0; | |
3751 | } | |
0915bb0c | 3752 | |
0915bb0c AS |
3753 | break; |
3754 | ||
d62a17ae | 3755 | case RIB_TABLES_ITER_S_DONE: |
3756 | return NULL; | |
0915bb0c AS |
3757 | } |
3758 | ||
d62a17ae | 3759 | if (table) |
3760 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
3761 | else | |
3762 | iter->state = RIB_TABLES_ITER_S_DONE; | |
0915bb0c | 3763 | |
d62a17ae | 3764 | return table; |
0915bb0c | 3765 | } |