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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 | 81 | [ZEBRA_ROUTE_NHG] = {ZEBRA_ROUTE_NHG, 255 /* Uneeded for nhg's */, 0}, |
c17b2d5b DS |
82 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0, 6}, |
83 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0, 2}, | |
e22e8001 | 84 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0, 1}, |
c17b2d5b DS |
85 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1, 3}, |
86 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120, 4}, | |
87 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120, 4}, | |
88 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110, 4}, | |
89 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110, 4}, | |
90 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115, 4}, | |
91 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */, 5}, | |
92 | [ZEBRA_ROUTE_PIM] = {ZEBRA_ROUTE_PIM, 255, 6}, | |
93 | [ZEBRA_ROUTE_EIGRP] = {ZEBRA_ROUTE_EIGRP, 90, 4}, | |
94 | [ZEBRA_ROUTE_NHRP] = {ZEBRA_ROUTE_NHRP, 10, 4}, | |
95 | [ZEBRA_ROUTE_HSLS] = {ZEBRA_ROUTE_HSLS, 255, 6}, | |
96 | [ZEBRA_ROUTE_OLSR] = {ZEBRA_ROUTE_OLSR, 255, 6}, | |
97 | [ZEBRA_ROUTE_TABLE] = {ZEBRA_ROUTE_TABLE, 150, 3}, | |
98 | [ZEBRA_ROUTE_LDP] = {ZEBRA_ROUTE_LDP, 150, 6}, | |
99 | [ZEBRA_ROUTE_VNC] = {ZEBRA_ROUTE_VNC, 20, 5}, | |
100 | [ZEBRA_ROUTE_VNC_DIRECT] = {ZEBRA_ROUTE_VNC_DIRECT, 20, 5}, | |
101 | [ZEBRA_ROUTE_VNC_DIRECT_RH] = {ZEBRA_ROUTE_VNC_DIRECT_RH, 20, 5}, | |
102 | [ZEBRA_ROUTE_BGP_DIRECT] = {ZEBRA_ROUTE_BGP_DIRECT, 20, 5}, | |
103 | [ZEBRA_ROUTE_BGP_DIRECT_EXT] = {ZEBRA_ROUTE_BGP_DIRECT_EXT, 20, 5}, | |
104 | [ZEBRA_ROUTE_BABEL] = {ZEBRA_ROUTE_BABEL, 100, 4}, | |
105 | [ZEBRA_ROUTE_SHARP] = {ZEBRA_ROUTE_SHARP, 150, 6}, | |
106 | [ZEBRA_ROUTE_PBR] = {ZEBRA_ROUTE_PBR, 200, 6}, | |
107 | [ZEBRA_ROUTE_BFD] = {ZEBRA_ROUTE_BFD, 255, 6}, | |
108 | [ZEBRA_ROUTE_OPENFABRIC] = {ZEBRA_ROUTE_OPENFABRIC, 115, 4}, | |
109 | [ZEBRA_ROUTE_VRRP] = {ZEBRA_ROUTE_VRRP, 255, 6}, | |
110 | [ZEBRA_ROUTE_SRTE] = {ZEBRA_ROUTE_SRTE, 255, 6}, | |
d6abd8b0 | 111 | /* Any new route type added to zebra, should be mirrored here */ |
c710b277 | 112 | |
d62a17ae | 113 | /* no entry/default: 150 */ |
718e3744 | 114 | }; |
6b0655a2 | 115 | |
07ef3e34 | 116 | static void PRINTFRR(5, 6) |
d62a17ae | 117 | _rnode_zlog(const char *_func, vrf_id_t vrf_id, struct route_node *rn, |
118 | int priority, const char *msgfmt, ...) | |
2263a412 | 119 | { |
d62a17ae | 120 | char buf[SRCDEST2STR_BUFFER + sizeof(" (MRIB)")]; |
121 | char msgbuf[512]; | |
122 | va_list ap; | |
c2c02b76 | 123 | uint32_t table = 0; |
2263a412 | 124 | |
d62a17ae | 125 | va_start(ap, msgfmt); |
126 | vsnprintf(msgbuf, sizeof(msgbuf), msgfmt, ap); | |
127 | va_end(ap); | |
2263a412 | 128 | |
d62a17ae | 129 | if (rn) { |
630d5962 | 130 | struct rib_table_info *info = srcdest_rnode_table_info(rn); |
c2c02b76 DS |
131 | rib_dest_t *dest = NULL; |
132 | struct route_entry *re = NULL; | |
133 | ||
d62a17ae | 134 | srcdest_rnode2str(rn, buf, sizeof(buf)); |
cb653491 | 135 | |
d62a17ae | 136 | if (info->safi == SAFI_MULTICAST) |
eab4a5c2 | 137 | strlcat(buf, " (MRIB)", sizeof(buf)); |
c2c02b76 DS |
138 | |
139 | dest = rib_dest_from_rnode(rn); | |
140 | if (dest) | |
141 | re = re_list_first(&dest->routes); | |
142 | if (re) | |
143 | table = re->table; | |
d62a17ae | 144 | } else { |
145 | snprintf(buf, sizeof(buf), "{(route_node *) NULL}"); | |
146 | } | |
2263a412 | 147 | |
c2c02b76 | 148 | zlog(priority, "%s: (%u:%u):%s: %s", _func, vrf_id, table, buf, msgbuf); |
2263a412 DL |
149 | } |
150 | ||
d62a17ae | 151 | #define rnode_debug(node, vrf_id, ...) \ |
2263a412 | 152 | _rnode_zlog(__func__, vrf_id, node, LOG_DEBUG, __VA_ARGS__) |
d62a17ae | 153 | #define rnode_info(node, ...) \ |
2263a412 DL |
154 | _rnode_zlog(__func__, vrf_id, node, LOG_INFO, __VA_ARGS__) |
155 | ||
fd289fc8 | 156 | uint8_t route_distance(int type) |
40c7bdb0 | 157 | { |
fd289fc8 | 158 | uint8_t distance; |
40c7bdb0 | 159 | |
d62a17ae | 160 | if ((unsigned)type >= array_size(route_info)) |
161 | distance = 150; | |
162 | else | |
163 | distance = route_info[type].distance; | |
40c7bdb0 | 164 | |
d62a17ae | 165 | return distance; |
40c7bdb0 | 166 | } |
167 | ||
d7c0a89a | 168 | int is_zebra_valid_kernel_table(uint32_t table_id) |
7a4bb9c5 | 169 | { |
8f500a1c | 170 | #ifdef linux |
d62a17ae | 171 | if ((table_id == RT_TABLE_UNSPEC) || (table_id == RT_TABLE_LOCAL) |
172 | || (table_id == RT_TABLE_COMPAT)) | |
173 | return 0; | |
8f500a1c RW |
174 | #endif |
175 | ||
d62a17ae | 176 | return 1; |
7a4bb9c5 DS |
177 | } |
178 | ||
d7c0a89a | 179 | int is_zebra_main_routing_table(uint32_t table_id) |
7a4bb9c5 | 180 | { |
c447ad08 | 181 | if (table_id == RT_TABLE_MAIN) |
d62a17ae | 182 | return 1; |
183 | return 0; | |
7a4bb9c5 DS |
184 | } |
185 | ||
86391e56 | 186 | int zebra_check_addr(const struct prefix *p) |
0aabccc0 | 187 | { |
d62a17ae | 188 | if (p->family == AF_INET) { |
d7c0a89a | 189 | uint32_t addr; |
0aabccc0 | 190 | |
d62a17ae | 191 | addr = p->u.prefix4.s_addr; |
192 | addr = ntohl(addr); | |
0aabccc0 | 193 | |
d62a17ae | 194 | if (IPV4_NET127(addr) || IN_CLASSD(addr) |
195 | || IPV4_LINKLOCAL(addr)) | |
196 | return 0; | |
197 | } | |
198 | if (p->family == AF_INET6) { | |
199 | if (IN6_IS_ADDR_LOOPBACK(&p->u.prefix6)) | |
200 | return 0; | |
201 | if (IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
202 | return 0; | |
203 | } | |
204 | return 1; | |
0aabccc0 DD |
205 | } |
206 | ||
6e26278c DS |
207 | /** |
208 | * copy_nexthop - copy a nexthop to the rib structure. | |
209 | */ | |
d62a17ae | 210 | void route_entry_copy_nexthops(struct route_entry *re, struct nexthop *nh) |
6e26278c | 211 | { |
c415d895 MS |
212 | assert(!re->nhe->nhg.nexthop); |
213 | copy_nexthops(&re->nhe->nhg.nexthop, nh, NULL); | |
718e3744 | 214 | } |
215 | ||
5463ce26 MS |
216 | static void route_entry_attach_ref(struct route_entry *re, |
217 | struct nhg_hash_entry *new) | |
718e3744 | 218 | { |
0eb97b86 | 219 | re->nhe = new; |
5463ce26 | 220 | re->nhe_id = new->id; |
718e3744 | 221 | |
5463ce26 | 222 | zebra_nhg_increment_ref(new); |
718e3744 | 223 | } |
224 | ||
cd7108ba EDP |
225 | int route_entry_update_nhe(struct route_entry *re, |
226 | struct nhg_hash_entry *new_nhghe) | |
718e3744 | 227 | { |
377e29f7 | 228 | struct nhg_hash_entry *old; |
5463ce26 | 229 | int ret = 0; |
718e3744 | 230 | |
cd7108ba | 231 | if (new_nhghe == NULL) { |
c415d895 MS |
232 | if (re->nhe) |
233 | zebra_nhg_decrement_ref(re->nhe); | |
234 | re->nhe = NULL; | |
5463ce26 MS |
235 | goto done; |
236 | } | |
718e3744 | 237 | |
1f655680 | 238 | if ((re->nhe_id != 0) && re->nhe && (re->nhe != new_nhghe)) { |
c415d895 | 239 | old = re->nhe; |
718e3744 | 240 | |
cd7108ba | 241 | route_entry_attach_ref(re, new_nhghe); |
718e3744 | 242 | |
5463ce26 MS |
243 | if (old) |
244 | zebra_nhg_decrement_ref(old); | |
84a89a8d | 245 | } else if (!re->nhe) |
5463ce26 | 246 | /* This is the first time it's being attached */ |
cd7108ba | 247 | route_entry_attach_ref(re, new_nhghe); |
595db7f1 | 248 | |
5463ce26 MS |
249 | done: |
250 | return ret; | |
595db7f1 | 251 | } |
252 | ||
1f655680 SW |
253 | void rib_handle_nhg_replace(struct nhg_hash_entry *old, |
254 | struct nhg_hash_entry *new) | |
255 | { | |
256 | struct zebra_router_table *zrt; | |
257 | struct route_node *rn; | |
258 | struct route_entry *re, *next; | |
259 | ||
260 | if (IS_ZEBRA_DEBUG_RIB_DETAILED || IS_ZEBRA_DEBUG_NHG_DETAIL) | |
261 | zlog_debug("%s: replacing routes nhe (%u) OLD %p NEW %p", | |
262 | __func__, new->id, new, old); | |
263 | ||
264 | /* We have to do them ALL */ | |
265 | RB_FOREACH (zrt, zebra_router_table_head, &zrouter.tables) { | |
266 | for (rn = route_top(zrt->table); rn; | |
267 | rn = srcdest_route_next(rn)) { | |
268 | RNODE_FOREACH_RE_SAFE (rn, re, next) { | |
269 | if (re->nhe && re->nhe == old) | |
270 | route_entry_update_nhe(re, new); | |
271 | } | |
272 | } | |
273 | } | |
274 | } | |
275 | ||
d62a17ae | 276 | struct route_entry *rib_match(afi_t afi, safi_t safi, vrf_id_t vrf_id, |
277 | union g_addr *addr, struct route_node **rn_out) | |
278 | { | |
279 | struct prefix p; | |
280 | struct route_table *table; | |
281 | struct route_node *rn; | |
5f7a4718 | 282 | struct route_entry *match = NULL; |
d62a17ae | 283 | |
284 | /* Lookup table. */ | |
285 | table = zebra_vrf_table(afi, safi, vrf_id); | |
286 | if (!table) | |
287 | return 0; | |
288 | ||
289 | memset(&p, 0, sizeof(struct prefix)); | |
290 | p.family = afi; | |
291 | if (afi == AFI_IP) { | |
292 | p.u.prefix4 = addr->ipv4; | |
293 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
294 | } else { | |
295 | p.u.prefix6 = addr->ipv6; | |
296 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
297 | } | |
718e3744 | 298 | |
c4efd0f4 | 299 | rn = route_node_match(table, &p); |
718e3744 | 300 | |
d62a17ae | 301 | while (rn) { |
5f7a4718 DS |
302 | rib_dest_t *dest; |
303 | ||
d62a17ae | 304 | route_unlock_node(rn); |
718e3744 | 305 | |
5f7a4718 | 306 | dest = rib_dest_from_rnode(rn); |
996c9314 LB |
307 | if (dest && dest->selected_fib |
308 | && !CHECK_FLAG(dest->selected_fib->status, | |
309 | ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 310 | match = dest->selected_fib; |
718e3744 | 311 | |
d62a17ae | 312 | /* If there is no selected route or matched route is EGP, go up |
313 | tree. */ | |
314 | if (!match) { | |
315 | do { | |
316 | rn = rn->parent; | |
317 | } while (rn && rn->info == NULL); | |
318 | if (rn) | |
319 | route_lock_node(rn); | |
320 | } else { | |
321 | if (match->type != ZEBRA_ROUTE_CONNECT) { | |
677c1dd5 DS |
322 | if (!CHECK_FLAG(match->status, |
323 | ROUTE_ENTRY_INSTALLED)) | |
d62a17ae | 324 | return NULL; |
325 | } | |
326 | ||
327 | if (rn_out) | |
328 | *rn_out = rn; | |
329 | return match; | |
330 | } | |
16814f96 | 331 | } |
d62a17ae | 332 | return NULL; |
333 | } | |
334 | ||
335 | struct route_entry *rib_match_ipv4_multicast(vrf_id_t vrf_id, | |
336 | struct in_addr addr, | |
337 | struct route_node **rn_out) | |
338 | { | |
339 | struct route_entry *re = NULL, *mre = NULL, *ure = NULL; | |
340 | struct route_node *m_rn = NULL, *u_rn = NULL; | |
341 | union g_addr gaddr = {.ipv4 = addr}; | |
342 | ||
526052fb | 343 | switch (zrouter.ipv4_multicast_mode) { |
d62a17ae | 344 | case MCAST_MRIB_ONLY: |
345 | return rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
346 | rn_out); | |
347 | case MCAST_URIB_ONLY: | |
348 | return rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, rn_out); | |
349 | case MCAST_NO_CONFIG: | |
350 | case MCAST_MIX_MRIB_FIRST: | |
351 | re = mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
352 | &m_rn); | |
353 | if (!mre) | |
354 | re = ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, | |
355 | &gaddr, &u_rn); | |
356 | break; | |
357 | case MCAST_MIX_DISTANCE: | |
358 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
359 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
360 | if (mre && ure) | |
361 | re = ure->distance < mre->distance ? ure : mre; | |
362 | else if (mre) | |
363 | re = mre; | |
364 | else if (ure) | |
365 | re = ure; | |
366 | break; | |
367 | case MCAST_MIX_PFXLEN: | |
368 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
369 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
370 | if (mre && ure) | |
371 | re = u_rn->p.prefixlen > m_rn->p.prefixlen ? ure : mre; | |
372 | else if (mre) | |
373 | re = mre; | |
374 | else if (ure) | |
375 | re = ure; | |
376 | break; | |
718e3744 | 377 | } |
33550aa8 | 378 | |
d62a17ae | 379 | if (rn_out) |
380 | *rn_out = (re == mre) ? m_rn : u_rn; | |
718e3744 | 381 | |
d62a17ae | 382 | if (IS_ZEBRA_DEBUG_RIB) { |
383 | char buf[BUFSIZ]; | |
384 | inet_ntop(AF_INET, &addr, buf, BUFSIZ); | |
4623d897 | 385 | |
bd47f3a3 JU |
386 | zlog_debug("%s: %s: vrf: %s(%u) found %s, using %s", __func__, |
387 | buf, vrf_id_to_name(vrf_id), vrf_id, | |
d62a17ae | 388 | mre ? (ure ? "MRIB+URIB" : "MRIB") |
389 | : ure ? "URIB" : "nothing", | |
390 | re == ure ? "URIB" : re == mre ? "MRIB" : "none"); | |
391 | } | |
392 | return re; | |
4623d897 DL |
393 | } |
394 | ||
d62a17ae | 395 | struct route_entry *rib_lookup_ipv4(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 396 | { |
d62a17ae | 397 | struct route_table *table; |
398 | struct route_node *rn; | |
5f7a4718 | 399 | struct route_entry *match = NULL; |
5f7a4718 | 400 | rib_dest_t *dest; |
718e3744 | 401 | |
d62a17ae | 402 | /* Lookup table. */ |
403 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
404 | if (!table) | |
405 | return 0; | |
718e3744 | 406 | |
d62a17ae | 407 | rn = route_node_lookup(table, (struct prefix *)p); |
718e3744 | 408 | |
d62a17ae | 409 | /* No route for this prefix. */ |
410 | if (!rn) | |
411 | return NULL; | |
718e3744 | 412 | |
d62a17ae | 413 | /* Unlock node. */ |
414 | route_unlock_node(rn); | |
5f7a4718 | 415 | dest = rib_dest_from_rnode(rn); |
718e3744 | 416 | |
996c9314 LB |
417 | if (dest && dest->selected_fib |
418 | && !CHECK_FLAG(dest->selected_fib->status, ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 419 | match = dest->selected_fib; |
718e3744 | 420 | |
d62a17ae | 421 | if (!match) |
422 | return NULL; | |
718e3744 | 423 | |
d62a17ae | 424 | if (match->type == ZEBRA_ROUTE_CONNECT) |
425 | return match; | |
f9e1b38e | 426 | |
677c1dd5 DS |
427 | if (CHECK_FLAG(match->status, ROUTE_ENTRY_INSTALLED)) |
428 | return match; | |
718e3744 | 429 | |
d62a17ae | 430 | return NULL; |
718e3744 | 431 | } |
432 | ||
a64448ba DS |
433 | /* |
434 | * Is this RIB labeled-unicast? It must be of type BGP and all paths | |
435 | * (nexthops) must have a label. | |
436 | */ | |
d62a17ae | 437 | int zebra_rib_labeled_unicast(struct route_entry *re) |
a64448ba | 438 | { |
d62a17ae | 439 | struct nexthop *nexthop = NULL; |
a64448ba | 440 | |
d62a17ae | 441 | if (re->type != ZEBRA_ROUTE_BGP) |
442 | return 0; | |
a64448ba | 443 | |
c415d895 | 444 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
d62a17ae | 445 | if (!nexthop->nh_label || !nexthop->nh_label->num_labels) |
446 | return 0; | |
6b0655a2 | 447 | |
d62a17ae | 448 | return 1; |
a64448ba | 449 | } |
718e3744 | 450 | |
6ae24471 DS |
451 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
452 | * is only used for IPv4. | |
453 | */ | |
0c555cc6 DS |
454 | void rib_install_kernel(struct route_node *rn, struct route_entry *re, |
455 | struct route_entry *old) | |
718e3744 | 456 | { |
d62a17ae | 457 | struct nexthop *nexthop; |
630d5962 | 458 | struct rib_table_info *info = srcdest_rnode_table_info(rn); |
d62a17ae | 459 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
97f5b441 MS |
460 | const struct prefix *p, *src_p; |
461 | enum zebra_dplane_result ret; | |
462 | ||
463 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
718e3744 | 464 | |
d62a17ae | 465 | srcdest_rnode_prefixes(rn, &p, &src_p); |
416ec78d | 466 | |
d62a17ae | 467 | if (info->safi != SAFI_UNICAST) { |
c415d895 | 468 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
d62a17ae | 469 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 470 | return; |
d62a17ae | 471 | } |
718e3744 | 472 | |
9ef49038 | 473 | |
8dfbc657 SW |
474 | /* |
475 | * Install the resolved nexthop object first. | |
476 | */ | |
c415d895 | 477 | zebra_nhg_install_kernel(re->nhe); |
8dfbc657 | 478 | |
2063a814 DS |
479 | /* |
480 | * If this is a replace to a new RE let the originator of the RE | |
481 | * know that they've lost | |
482 | */ | |
9a9f8926 | 483 | if (old && (old != re) && (old->type != re->type)) |
28610f7e | 484 | zsend_route_notify_owner(old, p, ZAPI_ROUTE_BETTER_ADMIN_WON); |
25b9cb0c | 485 | |
97f5b441 MS |
486 | /* Update fib selection */ |
487 | dest->selected_fib = re; | |
488 | ||
d62a17ae | 489 | /* |
490 | * Make sure we update the FPM any time we send new information to | |
491 | * the kernel. | |
492 | */ | |
493 | hook_call(rib_update, rn, "installing in kernel"); | |
97f5b441 MS |
494 | |
495 | /* Send add or update */ | |
8263d1d0 | 496 | if (old) |
97f5b441 | 497 | ret = dplane_route_update(rn, re, old); |
5709131c | 498 | else |
97f5b441 | 499 | ret = dplane_route_add(rn, re); |
97f5b441 MS |
500 | |
501 | switch (ret) { | |
ea1c14f6 | 502 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
60f98b23 | 503 | SET_FLAG(re->status, ROUTE_ENTRY_QUEUED); |
efe6c026 MS |
504 | |
505 | if (old) { | |
60f98b23 | 506 | SET_FLAG(old->status, ROUTE_ENTRY_QUEUED); |
efe6c026 MS |
507 | |
508 | /* Free old FIB nexthop group */ | |
7483dcbe | 509 | UNSET_FLAG(old->status, ROUTE_ENTRY_USE_FIB_NHG); |
efe6c026 MS |
510 | if (old->fib_ng.nexthop) { |
511 | nexthops_free(old->fib_ng.nexthop); | |
512 | old->fib_ng.nexthop = NULL; | |
513 | } | |
efe6c026 MS |
514 | } |
515 | ||
97f5b441 MS |
516 | if (zvrf) |
517 | zvrf->installs_queued++; | |
1e885672 | 518 | break; |
ea1c14f6 | 519 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
97f5b441 MS |
520 | { |
521 | char str[SRCDEST2STR_BUFFER]; | |
522 | ||
523 | srcdest_rnode2str(rn, str, sizeof(str)); | |
524 | flog_err(EC_ZEBRA_DP_INSTALL_FAIL, | |
b96f64f7 DS |
525 | "%u:%u:%s: Failed to enqueue dataplane install", |
526 | re->vrf_id, re->table, str); | |
1e885672 | 527 | break; |
97f5b441 | 528 | } |
ea1c14f6 | 529 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
97f5b441 MS |
530 | if (zvrf) |
531 | zvrf->installs++; | |
1e885672 DS |
532 | break; |
533 | } | |
d62a17ae | 534 | |
0c555cc6 | 535 | return; |
718e3744 | 536 | } |
537 | ||
538 | /* Uninstall the route from kernel. */ | |
0c555cc6 | 539 | void rib_uninstall_kernel(struct route_node *rn, struct route_entry *re) |
718e3744 | 540 | { |
d62a17ae | 541 | struct nexthop *nexthop; |
630d5962 | 542 | struct rib_table_info *info = srcdest_rnode_table_info(rn); |
d62a17ae | 543 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
05737783 | 544 | |
d62a17ae | 545 | if (info->safi != SAFI_UNICAST) { |
677c1dd5 | 546 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
c415d895 | 547 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
d6792f9d | 548 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 549 | return; |
d62a17ae | 550 | } |
416ec78d | 551 | |
d62a17ae | 552 | /* |
553 | * Make sure we update the FPM any time we send new information to | |
97f5b441 | 554 | * the dataplane. |
d62a17ae | 555 | */ |
556 | hook_call(rib_update, rn, "uninstalling from kernel"); | |
97f5b441 MS |
557 | |
558 | switch (dplane_route_delete(rn, re)) { | |
ea1c14f6 | 559 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
97f5b441 MS |
560 | if (zvrf) |
561 | zvrf->removals_queued++; | |
1e885672 | 562 | break; |
ea1c14f6 | 563 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
97f5b441 MS |
564 | { |
565 | char str[SRCDEST2STR_BUFFER]; | |
566 | ||
567 | srcdest_rnode2str(rn, str, sizeof(str)); | |
568 | flog_err(EC_ZEBRA_DP_INSTALL_FAIL, | |
569 | "%u:%s: Failed to enqueue dataplane uninstall", | |
570 | re->vrf_id, str); | |
1e885672 | 571 | break; |
97f5b441 | 572 | } |
ea1c14f6 | 573 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
1e885672 DS |
574 | if (zvrf) |
575 | zvrf->removals++; | |
576 | break; | |
577 | } | |
718e3744 | 578 | |
0c555cc6 | 579 | return; |
718e3744 | 580 | } |
581 | ||
582 | /* Uninstall the route from kernel. */ | |
d62a17ae | 583 | static void rib_uninstall(struct route_node *rn, struct route_entry *re) |
718e3744 | 584 | { |
630d5962 | 585 | struct rib_table_info *info = srcdest_rnode_table_info(rn); |
5f7a4718 | 586 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
97f5b441 | 587 | struct nexthop *nexthop; |
416ec78d | 588 | |
5f7a4718 | 589 | if (dest && dest->selected_fib == re) { |
d62a17ae | 590 | if (info->safi == SAFI_UNICAST) |
591 | hook_call(rib_update, rn, "rib_uninstall"); | |
5adc2528 | 592 | |
d62a17ae | 593 | /* If labeled-unicast route, uninstall transit LSP. */ |
594 | if (zebra_rib_labeled_unicast(re)) | |
595 | zebra_mpls_lsp_uninstall(info->zvrf, rn, re); | |
7cdb1a84 | 596 | |
3cdba47a | 597 | rib_uninstall_kernel(rn, re); |
97f5b441 MS |
598 | |
599 | dest->selected_fib = NULL; | |
600 | ||
efe6c026 MS |
601 | /* Free FIB nexthop group, if present */ |
602 | if (re->fib_ng.nexthop) { | |
603 | nexthops_free(re->fib_ng.nexthop); | |
604 | re->fib_ng.nexthop = NULL; | |
605 | } | |
7483dcbe | 606 | UNSET_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG); |
efe6c026 | 607 | |
c415d895 | 608 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
97f5b441 | 609 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
d62a17ae | 610 | } |
446bb95e | 611 | |
d62a17ae | 612 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { |
86391e56 MS |
613 | const struct prefix *p, *src_p; |
614 | ||
d62a17ae | 615 | srcdest_rnode_prefixes(rn, &p, &src_p); |
05737783 | 616 | |
40f321c0 | 617 | redistribute_delete(p, src_p, re, NULL); |
d62a17ae | 618 | UNSET_FLAG(re->flags, ZEBRA_FLAG_SELECTED); |
619 | } | |
718e3744 | 620 | } |
621 | ||
9fd92e3c AS |
622 | /* |
623 | * rib_can_delete_dest | |
624 | * | |
2951a7a4 | 625 | * Returns true if the given dest can be deleted from the table. |
9fd92e3c | 626 | */ |
d62a17ae | 627 | static int rib_can_delete_dest(rib_dest_t *dest) |
9fd92e3c | 628 | { |
045207e2 | 629 | if (re_list_first(&dest->routes)) { |
d62a17ae | 630 | return 0; |
631 | } | |
9fd92e3c | 632 | |
c86ba6c2 DS |
633 | /* |
634 | * Unresolved rnh's are stored on the default route's list | |
635 | * | |
636 | * dest->rnode can also be the source prefix node in an | |
637 | * ipv6 sourcedest table. Fortunately the prefix of a | |
638 | * source prefix node can never be the default prefix. | |
639 | */ | |
640 | if (is_default_prefix(&dest->rnode->p)) | |
641 | return 0; | |
642 | ||
d62a17ae | 643 | /* |
644 | * Don't delete the dest if we have to update the FPM about this | |
645 | * prefix. | |
646 | */ | |
647 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_FPM) | |
648 | || CHECK_FLAG(dest->flags, RIB_DEST_SENT_TO_FPM)) | |
649 | return 0; | |
5adc2528 | 650 | |
d62a17ae | 651 | return 1; |
9fd92e3c AS |
652 | } |
653 | ||
699dae23 DS |
654 | void zebra_rib_evaluate_rn_nexthops(struct route_node *rn, uint32_t seq) |
655 | { | |
656 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
699dae23 DS |
657 | struct rnh *rnh; |
658 | ||
659 | /* | |
50872b08 | 660 | * We are storing the rnh's associated withb |
699dae23 DS |
661 | * the tracked nexthop as a list of the rn's. |
662 | * Unresolved rnh's are placed at the top | |
663 | * of the tree list.( 0.0.0.0/0 for v4 and 0::0/0 for v6 ) | |
664 | * As such for each rn we need to walk up the tree | |
665 | * and see if any rnh's need to see if they | |
666 | * would match a more specific route | |
667 | */ | |
668 | while (rn) { | |
50872b08 DS |
669 | if (IS_ZEBRA_DEBUG_NHT_DETAILED) { |
670 | char buf[PREFIX_STRLEN]; | |
671 | ||
15569c58 DA |
672 | zlog_debug( |
673 | "%s: %s Being examined for Nexthop Tracking Count: %zd", | |
674 | __func__, | |
675 | srcdest_rnode2str(rn, buf, sizeof(buf)), | |
676 | dest ? rnh_list_count(&dest->nht) : 0); | |
50872b08 | 677 | } |
699dae23 DS |
678 | if (!dest) { |
679 | rn = rn->parent; | |
680 | if (rn) | |
681 | dest = rib_dest_from_rnode(rn); | |
682 | continue; | |
683 | } | |
684 | /* | |
685 | * If we have any rnh's stored in the nht list | |
686 | * then we know that this route node was used for | |
687 | * nht resolution and as such we need to call the | |
688 | * nexthop tracking evaluation code | |
689 | */ | |
739c9c90 | 690 | frr_each_safe(rnh_list, &dest->nht, rnh) { |
699dae23 DS |
691 | struct zebra_vrf *zvrf = |
692 | zebra_vrf_lookup_by_id(rnh->vrf_id); | |
693 | struct prefix *p = &rnh->node->p; | |
694 | ||
50872b08 | 695 | if (IS_ZEBRA_DEBUG_NHT_DETAILED) { |
699dae23 | 696 | char buf1[PREFIX_STRLEN]; |
699dae23 | 697 | |
bd47f3a3 | 698 | zlog_debug( |
2dbe669b | 699 | "%s(%u):%s has Nexthop(%pFX) Type: %s depending on it, evaluating %u:%u", |
bd47f3a3 JU |
700 | zvrf_name(zvrf), zvrf_id(zvrf), |
701 | srcdest_rnode2str(rn, buf1, | |
702 | sizeof(buf1)), | |
2dbe669b | 703 | p, rnh_type2str(rnh->type), seq, |
bd47f3a3 | 704 | rnh->seqno); |
699dae23 DS |
705 | } |
706 | ||
707 | /* | |
708 | * If we have evaluated this node on this pass | |
709 | * already, due to following the tree up | |
710 | * then we know that we can move onto the next | |
711 | * rnh to process. | |
712 | * | |
713 | * Additionally we call zebra_evaluate_rnh | |
714 | * when we gc the dest. In this case we know | |
715 | * that there must be no other re's where | |
716 | * we were originally as such we know that | |
717 | * that sequence number is ok to respect. | |
718 | */ | |
50872b08 DS |
719 | if (rnh->seqno == seq) { |
720 | if (IS_ZEBRA_DEBUG_NHT_DETAILED) | |
721 | zlog_debug( | |
722 | "\tNode processed and moved already"); | |
699dae23 | 723 | continue; |
50872b08 | 724 | } |
699dae23 DS |
725 | |
726 | rnh->seqno = seq; | |
727 | zebra_evaluate_rnh(zvrf, family2afi(p->family), 0, | |
728 | rnh->type, p); | |
729 | } | |
730 | ||
731 | rn = rn->parent; | |
732 | if (rn) | |
733 | dest = rib_dest_from_rnode(rn); | |
734 | } | |
735 | } | |
736 | ||
9fd92e3c AS |
737 | /* |
738 | * rib_gc_dest | |
739 | * | |
740 | * Garbage collect the rib dest corresponding to the given route node | |
741 | * if appropriate. | |
742 | * | |
2951a7a4 | 743 | * Returns true if the dest was deleted, false otherwise. |
9fd92e3c | 744 | */ |
d62a17ae | 745 | int rib_gc_dest(struct route_node *rn) |
9fd92e3c | 746 | { |
d62a17ae | 747 | rib_dest_t *dest; |
9fd92e3c | 748 | |
d62a17ae | 749 | dest = rib_dest_from_rnode(rn); |
750 | if (!dest) | |
751 | return 0; | |
9fd92e3c | 752 | |
d62a17ae | 753 | if (!rib_can_delete_dest(dest)) |
754 | return 0; | |
9fd92e3c | 755 | |
c9abf558 DS |
756 | if (IS_ZEBRA_DEBUG_RIB) { |
757 | struct zebra_vrf *zvrf; | |
758 | ||
759 | zvrf = rib_dest_vrf(dest); | |
d62a17ae | 760 | rnode_debug(rn, zvrf_id(zvrf), "removing dest from table"); |
c9abf558 | 761 | } |
9fd92e3c | 762 | |
699dae23 DS |
763 | zebra_rib_evaluate_rn_nexthops(rn, zebra_router_get_next_sequence()); |
764 | ||
d62a17ae | 765 | dest->rnode = NULL; |
aa57abfb | 766 | rnh_list_fini(&dest->nht); |
d62a17ae | 767 | XFREE(MTYPE_RIB_DEST, dest); |
768 | rn->info = NULL; | |
9fd92e3c | 769 | |
d62a17ae | 770 | /* |
771 | * Release the one reference that we keep on the route node. | |
772 | */ | |
773 | route_unlock_node(rn); | |
774 | return 1; | |
9fd92e3c AS |
775 | } |
776 | ||
d62a17ae | 777 | static void rib_process_add_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
778 | struct route_entry *new) | |
3e5c6e00 | 779 | { |
d62a17ae | 780 | hook_call(rib_update, rn, "new route selected"); |
3e5c6e00 | 781 | |
d62a17ae | 782 | /* Update real nexthop. This may actually determine if nexthop is active |
783 | * or not. */ | |
c415d895 | 784 | if (!nexthop_group_active_nexthop_num(&(new->nhe->nhg))) { |
d62a17ae | 785 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
786 | return; | |
787 | } | |
3e5c6e00 | 788 | |
d62a17ae | 789 | if (IS_ZEBRA_DEBUG_RIB) { |
790 | char buf[SRCDEST2STR_BUFFER]; | |
791 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
c2c02b76 DS |
792 | zlog_debug("%s(%u:%u):%s: Adding route rn %p, re %p (%s)", |
793 | zvrf_name(zvrf), zvrf_id(zvrf), new->table, buf, rn, | |
794 | new, zebra_route_string(new->type)); | |
d62a17ae | 795 | } |
3e5c6e00 | 796 | |
d62a17ae | 797 | /* If labeled-unicast route, install transit LSP. */ |
798 | if (zebra_rib_labeled_unicast(new)) | |
799 | zebra_mpls_lsp_install(zvrf, rn, new); | |
a64448ba | 800 | |
3cdba47a | 801 | rib_install_kernel(rn, new, NULL); |
3e5c6e00 | 802 | |
d62a17ae | 803 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
3e5c6e00 | 804 | } |
805 | ||
d62a17ae | 806 | static void rib_process_del_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
807 | struct route_entry *old) | |
3e5c6e00 | 808 | { |
d62a17ae | 809 | hook_call(rib_update, rn, "removing existing route"); |
3e5c6e00 | 810 | |
d62a17ae | 811 | /* Uninstall from kernel. */ |
812 | if (IS_ZEBRA_DEBUG_RIB) { | |
813 | char buf[SRCDEST2STR_BUFFER]; | |
814 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
c2c02b76 DS |
815 | zlog_debug("%s(%u:%u):%s: Deleting route rn %p, re %p (%s)", |
816 | zvrf_name(zvrf), zvrf_id(zvrf), old->table, buf, rn, | |
817 | old, zebra_route_string(old->type)); | |
d62a17ae | 818 | } |
3e5c6e00 | 819 | |
d62a17ae | 820 | /* If labeled-unicast route, uninstall transit LSP. */ |
821 | if (zebra_rib_labeled_unicast(old)) | |
822 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
823 | ||
3cdba47a | 824 | rib_uninstall_kernel(rn, old); |
d62a17ae | 825 | |
826 | /* Update nexthop for route, reset changed flag. */ | |
ef57f35f DL |
827 | /* Note: this code also handles the Linux case when an interface goes |
828 | * down, causing the kernel to delete routes without sending DELROUTE | |
829 | * notifications | |
830 | */ | |
6883bf8d | 831 | if (RIB_KERNEL_ROUTE(old)) |
212df1de PG |
832 | SET_FLAG(old->status, ROUTE_ENTRY_REMOVED); |
833 | else | |
834 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); | |
d62a17ae | 835 | } |
836 | ||
837 | static void rib_process_update_fib(struct zebra_vrf *zvrf, | |
838 | struct route_node *rn, | |
839 | struct route_entry *old, | |
840 | struct route_entry *new) | |
841 | { | |
d62a17ae | 842 | int nh_active = 0; |
d62a17ae | 843 | |
844 | /* | |
845 | * We have to install or update if a new route has been selected or | |
846 | * something has changed. | |
847 | */ | |
848 | if (new != old || CHECK_FLAG(new->status, ROUTE_ENTRY_CHANGED)) { | |
849 | hook_call(rib_update, rn, "updating existing route"); | |
850 | ||
851 | /* Update the nexthop; we could determine here that nexthop is | |
852 | * inactive. */ | |
c415d895 | 853 | if (nexthop_group_active_nexthop_num(&(new->nhe->nhg))) |
d62a17ae | 854 | nh_active = 1; |
855 | ||
856 | /* If nexthop is active, install the selected route, if | |
857 | * appropriate. If | |
858 | * the install succeeds, cleanup flags for prior route, if | |
859 | * different from | |
860 | * newly selected. | |
861 | */ | |
862 | if (nh_active) { | |
863 | if (IS_ZEBRA_DEBUG_RIB) { | |
864 | char buf[SRCDEST2STR_BUFFER]; | |
865 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
866 | if (new != old) | |
867 | zlog_debug( | |
c2c02b76 | 868 | "%s(%u:%u):%s: Updating route rn %p, re %p (%s) old %p (%s)", |
bd47f3a3 | 869 | zvrf_name(zvrf), zvrf_id(zvrf), |
c2c02b76 | 870 | new->table, buf, rn, new, |
2da33d6b DS |
871 | zebra_route_string(new->type), |
872 | old, | |
873 | zebra_route_string(old->type)); | |
d62a17ae | 874 | else |
875 | zlog_debug( | |
c2c02b76 | 876 | "%s(%u:%u):%s: Updating route rn %p, re %p (%s)", |
bd47f3a3 | 877 | zvrf_name(zvrf), zvrf_id(zvrf), |
c2c02b76 | 878 | new->table, buf, rn, new, |
2da33d6b | 879 | zebra_route_string(new->type)); |
d62a17ae | 880 | } |
881 | ||
882 | /* If labeled-unicast route, uninstall transit LSP. */ | |
883 | if (zebra_rib_labeled_unicast(old)) | |
884 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
885 | ||
3cdba47a DS |
886 | /* |
887 | * Non-system route should be installed. | |
888 | * If labeled-unicast route, install transit | |
889 | * LSP. | |
890 | */ | |
891 | if (zebra_rib_labeled_unicast(new)) | |
892 | zebra_mpls_lsp_install(zvrf, rn, new); | |
d62a17ae | 893 | |
3cdba47a | 894 | rib_install_kernel(rn, new, old); |
d62a17ae | 895 | } |
a64448ba | 896 | |
d62a17ae | 897 | /* |
898 | * If nexthop for selected route is not active or install | |
899 | * failed, we | |
900 | * may need to uninstall and delete for redistribution. | |
901 | */ | |
ed216282 | 902 | if (!nh_active) { |
d62a17ae | 903 | if (IS_ZEBRA_DEBUG_RIB) { |
904 | char buf[SRCDEST2STR_BUFFER]; | |
905 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
906 | if (new != old) | |
907 | zlog_debug( | |
c2c02b76 | 908 | "%s(%u:%u):%s: Deleting route rn %p, re %p (%s) old %p (%s) - nexthop inactive", |
bd47f3a3 | 909 | zvrf_name(zvrf), zvrf_id(zvrf), |
c2c02b76 | 910 | new->table, buf, rn, new, |
2da33d6b DS |
911 | zebra_route_string(new->type), |
912 | old, | |
913 | zebra_route_string(old->type)); | |
d62a17ae | 914 | else |
915 | zlog_debug( | |
c2c02b76 | 916 | "%s(%u:%u):%s: Deleting route rn %p, re %p (%s) - nexthop inactive", |
bd47f3a3 | 917 | zvrf_name(zvrf), zvrf_id(zvrf), |
c2c02b76 | 918 | new->table, buf, rn, new, |
2da33d6b | 919 | zebra_route_string(new->type)); |
d62a17ae | 920 | } |
921 | ||
5c18e662 DS |
922 | /* |
923 | * When we have gotten to this point | |
924 | * the new route entry has no nexthops | |
925 | * that are usable and as such we need | |
926 | * to remove the old route, but only | |
927 | * if we were the one who installed | |
928 | * the old route | |
929 | */ | |
930 | if (!RIB_SYSTEM_ROUTE(old)) { | |
931 | /* If labeled-unicast route, uninstall transit | |
932 | * LSP. */ | |
933 | if (zebra_rib_labeled_unicast(old)) | |
934 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
d62a17ae | 935 | |
5c18e662 DS |
936 | rib_uninstall_kernel(rn, old); |
937 | } | |
d62a17ae | 938 | } |
939 | } else { | |
940 | /* | |
941 | * Same route selected; check if in the FIB and if not, | |
3cdba47a DS |
942 | * re-install. This is housekeeping code to deal with |
943 | * race conditions in kernel with linux netlink reporting | |
944 | * interface up before IPv4 or IPv6 protocol is ready | |
d62a17ae | 945 | * to add routes. |
946 | */ | |
3cdba47a DS |
947 | if (!CHECK_FLAG(new->status, ROUTE_ENTRY_INSTALLED) || |
948 | RIB_SYSTEM_ROUTE(new)) | |
677c1dd5 | 949 | rib_install_kernel(rn, new, NULL); |
d62a17ae | 950 | } |
951 | ||
952 | /* Update prior route. */ | |
6883bf8d | 953 | if (new != old) |
d62a17ae | 954 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); |
3e5c6e00 | 955 | |
d62a17ae | 956 | /* Clear changed flag. */ |
957 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); | |
3e5c6e00 | 958 | } |
959 | ||
d62a17ae | 960 | /* Check if 'alternate' RIB entry is better than 'current'. */ |
961 | static struct route_entry *rib_choose_best(struct route_entry *current, | |
962 | struct route_entry *alternate) | |
963 | { | |
964 | if (current == NULL) | |
965 | return alternate; | |
966 | ||
967 | /* filter route selection in following order: | |
968 | * - connected beats other types | |
fec4ca19 | 969 | * - if both connected, loopback or vrf wins |
d62a17ae | 970 | * - lower distance beats higher |
971 | * - lower metric beats higher for equal distance | |
972 | * - last, hence oldest, route wins tie break. | |
973 | */ | |
974 | ||
fec4ca19 DS |
975 | /* Connected routes. Check to see if either are a vrf |
976 | * or loopback interface. If not, pick the last connected | |
d62a17ae | 977 | * route of the set of lowest metric connected routes. |
978 | */ | |
979 | if (alternate->type == ZEBRA_ROUTE_CONNECT) { | |
fec4ca19 DS |
980 | if (current->type != ZEBRA_ROUTE_CONNECT) |
981 | return alternate; | |
982 | ||
983 | /* both are connected. are either loop or vrf? */ | |
984 | struct nexthop *nexthop = NULL; | |
985 | ||
c415d895 | 986 | for (ALL_NEXTHOPS(alternate->nhe->nhg, nexthop)) { |
873fde8c | 987 | struct interface *ifp = if_lookup_by_index( |
988 | nexthop->ifindex, alternate->vrf_id); | |
989 | ||
990 | if (ifp && if_is_loopback_or_vrf(ifp)) | |
fec4ca19 DS |
991 | return alternate; |
992 | } | |
993 | ||
c415d895 | 994 | for (ALL_NEXTHOPS(current->nhe->nhg, nexthop)) { |
873fde8c | 995 | struct interface *ifp = if_lookup_by_index( |
996 | nexthop->ifindex, current->vrf_id); | |
997 | ||
998 | if (ifp && if_is_loopback_or_vrf(ifp)) | |
fec4ca19 DS |
999 | return current; |
1000 | } | |
1001 | ||
1002 | /* Neither are loop or vrf so pick best metric */ | |
1003 | if (alternate->metric <= current->metric) | |
d62a17ae | 1004 | return alternate; |
1005 | ||
1006 | return current; | |
1007 | } | |
3e5c6e00 | 1008 | |
d62a17ae | 1009 | if (current->type == ZEBRA_ROUTE_CONNECT) |
1010 | return current; | |
3e5c6e00 | 1011 | |
d62a17ae | 1012 | /* higher distance loses */ |
1013 | if (alternate->distance < current->distance) | |
1014 | return alternate; | |
1015 | if (current->distance < alternate->distance) | |
1016 | return current; | |
3e5c6e00 | 1017 | |
d62a17ae | 1018 | /* metric tie-breaks equal distance */ |
1019 | if (alternate->metric <= current->metric) | |
1020 | return alternate; | |
3e5c6e00 | 1021 | |
d62a17ae | 1022 | return current; |
3e5c6e00 | 1023 | } |
1024 | ||
e22e8001 SW |
1025 | /* Core function for processing nexthop group contexts's off metaq */ |
1026 | static void rib_nhg_process(struct nhg_ctx *ctx) | |
1027 | { | |
1028 | nhg_ctx_process(ctx); | |
1029 | } | |
1030 | ||
d62a17ae | 1031 | /* Core function for processing routing information base. */ |
1032 | static void rib_process(struct route_node *rn) | |
1033 | { | |
1034 | struct route_entry *re; | |
1035 | struct route_entry *next; | |
1036 | struct route_entry *old_selected = NULL; | |
1037 | struct route_entry *new_selected = NULL; | |
1038 | struct route_entry *old_fib = NULL; | |
1039 | struct route_entry *new_fib = NULL; | |
1040 | struct route_entry *best = NULL; | |
1041 | char buf[SRCDEST2STR_BUFFER]; | |
1042 | rib_dest_t *dest; | |
1043 | struct zebra_vrf *zvrf = NULL; | |
bd47f3a3 | 1044 | struct vrf *vrf; |
86391e56 MS |
1045 | const struct prefix *p, *src_p; |
1046 | ||
d62a17ae | 1047 | srcdest_rnode_prefixes(rn, &p, &src_p); |
1048 | vrf_id_t vrf_id = VRF_UNKNOWN; | |
1049 | ||
1050 | assert(rn); | |
1051 | ||
1052 | dest = rib_dest_from_rnode(rn); | |
1053 | if (dest) { | |
1054 | zvrf = rib_dest_vrf(dest); | |
1055 | vrf_id = zvrf_id(zvrf); | |
1056 | } | |
bab85d4f | 1057 | |
bd47f3a3 JU |
1058 | vrf = vrf_lookup_by_id(vrf_id); |
1059 | ||
d62a17ae | 1060 | if (IS_ZEBRA_DEBUG_RIB) |
1061 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bab85d4f | 1062 | |
607425e5 DS |
1063 | /* |
1064 | * we can have rn's that have a NULL info pointer | |
1065 | * (dest). As such let's not let the deref happen | |
1066 | * additionally we know RNODE_FOREACH_RE_SAFE | |
1067 | * will not iterate so we are ok. | |
1068 | */ | |
f5158712 MS |
1069 | if (dest) { |
1070 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { | |
1071 | struct route_entry *re = re_list_first(&dest->routes); | |
1072 | ||
1073 | zlog_debug("%s(%u:%u):%s: Processing rn %p", | |
1074 | VRF_LOGNAME(vrf), vrf_id, re->table, buf, | |
1075 | rn); | |
1076 | } | |
1077 | ||
607425e5 | 1078 | old_fib = dest->selected_fib; |
f5158712 | 1079 | } |
5f7a4718 | 1080 | |
a2addae8 | 1081 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 1082 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1083 | zlog_debug( | |
c2c02b76 DS |
1084 | "%s(%u:%u):%s: Examine re %p (%s) status %x flags %x dist %d metric %d", |
1085 | VRF_LOGNAME(vrf), vrf_id, re->table, buf, re, | |
bd47f3a3 JU |
1086 | zebra_route_string(re->type), re->status, |
1087 | re->flags, re->distance, re->metric); | |
d62a17ae | 1088 | |
d62a17ae | 1089 | /* Currently selected re. */ |
1090 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { | |
1091 | assert(old_selected == NULL); | |
1092 | old_selected = re; | |
1093 | } | |
bab85d4f | 1094 | |
d62a17ae | 1095 | /* Skip deleted entries from selection */ |
1096 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
1097 | continue; | |
1098 | ||
9d221fac DS |
1099 | /* |
1100 | * If the route entry has changed, verify/resolve | |
1101 | * the nexthops associated with the entry. | |
1102 | * | |
1103 | * In any event if we have nexthops that are not active | |
1104 | * then we cannot use this particular route entry so | |
1105 | * skip it. | |
d62a17ae | 1106 | */ |
9d221fac DS |
1107 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED)) { |
1108 | if (!nexthop_active_update(rn, re)) { | |
1109 | if (re->type == ZEBRA_ROUTE_TABLE) { | |
1110 | /* XXX: HERE BE DRAGONS!!!!! | |
1111 | * In all honesty, I have not yet | |
1112 | * figured out what this part does or | |
1113 | * why the ROUTE_ENTRY_CHANGED test | |
1114 | * above is correct or why we need to | |
1115 | * delete a route here, and also not | |
1116 | * whether this concerns both selected | |
1117 | * and fib route, or only selected | |
1118 | * or only fib | |
1119 | * | |
1120 | * This entry was denied by the 'ip | |
1121 | * protocol | |
1122 | * table' route-map, we need to delete | |
1123 | * it */ | |
1124 | if (re != old_selected) { | |
1125 | if (IS_ZEBRA_DEBUG_RIB) | |
1126 | zlog_debug( | |
1127 | "%s: %s(%u):%s: imported via import-table but denied by the ip protocol table route-map", | |
1128 | __func__, | |
1129 | VRF_LOGNAME( | |
1130 | vrf), | |
1131 | vrf_id, buf); | |
1132 | rib_unlink(rn, re); | |
1133 | } else | |
1134 | SET_FLAG(re->status, | |
1135 | ROUTE_ENTRY_REMOVED); | |
1136 | } | |
d62a17ae | 1137 | |
9d221fac DS |
1138 | continue; |
1139 | } | |
1140 | } else { | |
1141 | /* | |
1142 | * If the re has not changed and the nhg we have is | |
1143 | * not usable, then we cannot use this route entry | |
1144 | * for consideration, as that the route will just | |
1145 | * not install if it is selected. | |
1146 | */ | |
1147 | if (!nexthop_group_active_nexthop_num(&re->nhe->nhg)) | |
1148 | continue; | |
d62a17ae | 1149 | } |
bab85d4f | 1150 | |
d62a17ae | 1151 | /* Infinite distance. */ |
3332f4f0 DS |
1152 | if (re->distance == DISTANCE_INFINITY && |
1153 | re->type != ZEBRA_ROUTE_KERNEL) { | |
d62a17ae | 1154 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); |
1155 | continue; | |
1156 | } | |
bab85d4f | 1157 | |
d62a17ae | 1158 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_FIB_OVERRIDE)) { |
1159 | best = rib_choose_best(new_fib, re); | |
1160 | if (new_fib && best != new_fib) | |
1161 | UNSET_FLAG(new_fib->status, | |
1162 | ROUTE_ENTRY_CHANGED); | |
1163 | new_fib = best; | |
1164 | } else { | |
1165 | best = rib_choose_best(new_selected, re); | |
1166 | if (new_selected && best != new_selected) | |
1167 | UNSET_FLAG(new_selected->status, | |
1168 | ROUTE_ENTRY_CHANGED); | |
1169 | new_selected = best; | |
1170 | } | |
1171 | if (best != re) | |
1172 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
1173 | } /* RNODE_FOREACH_RE */ | |
1174 | ||
1175 | /* If no FIB override route, use the selected route also for FIB */ | |
1176 | if (new_fib == NULL) | |
1177 | new_fib = new_selected; | |
1178 | ||
1179 | /* After the cycle is finished, the following pointers will be set: | |
1180 | * old_selected --- RE entry currently having SELECTED | |
1181 | * new_selected --- RE entry that is newly SELECTED | |
1182 | * old_fib --- RE entry currently in kernel FIB | |
1183 | * new_fib --- RE entry that is newly to be in kernel FIB | |
1184 | * | |
1185 | * new_selected will get SELECTED flag, and is going to be redistributed | |
1186 | * the zclients. new_fib (which can be new_selected) will be installed | |
1187 | * in kernel. | |
1188 | */ | |
1189 | ||
1190 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { | |
c2c02b76 DS |
1191 | struct route_entry *entry; |
1192 | ||
1193 | entry = old_selected | |
1194 | ? old_selected | |
1195 | : new_selected | |
1196 | ? new_selected | |
1197 | : old_fib ? old_fib | |
1198 | : new_fib ? new_fib : NULL; | |
1199 | ||
d62a17ae | 1200 | zlog_debug( |
c2c02b76 DS |
1201 | "%s(%u:%u):%s: After processing: old_selected %p new_selected %p old_fib %p new_fib %p", |
1202 | VRF_LOGNAME(vrf), vrf_id, entry ? entry->table : 0, buf, | |
1203 | (void *)old_selected, (void *)new_selected, | |
1204 | (void *)old_fib, (void *)new_fib); | |
d62a17ae | 1205 | } |
446bb95e | 1206 | |
d62a17ae | 1207 | /* Buffer ROUTE_ENTRY_CHANGED here, because it will get cleared if |
1208 | * fib == selected */ | |
9d303b37 DL |
1209 | bool selected_changed = new_selected && CHECK_FLAG(new_selected->status, |
1210 | ROUTE_ENTRY_CHANGED); | |
d62a17ae | 1211 | |
1212 | /* Update fib according to selection results */ | |
1213 | if (new_fib && old_fib) | |
1214 | rib_process_update_fib(zvrf, rn, old_fib, new_fib); | |
1215 | else if (new_fib) | |
1216 | rib_process_add_fib(zvrf, rn, new_fib); | |
1217 | else if (old_fib) | |
1218 | rib_process_del_fib(zvrf, rn, old_fib); | |
1219 | ||
8cb41cd6 | 1220 | /* Update SELECTED entry */ |
d62a17ae | 1221 | if (old_selected != new_selected || selected_changed) { |
93bdadae | 1222 | |
6883bf8d | 1223 | if (new_selected && new_selected != new_fib) |
d62a17ae | 1224 | UNSET_FLAG(new_selected->status, ROUTE_ENTRY_CHANGED); |
41ec9222 | 1225 | |
3cdba47a | 1226 | if (new_selected) |
5af4b346 MS |
1227 | SET_FLAG(new_selected->flags, ZEBRA_FLAG_SELECTED); |
1228 | ||
d62a17ae | 1229 | if (old_selected) { |
40f321c0 MS |
1230 | /* |
1231 | * If we're removing the old entry, we should tell | |
1232 | * redist subscribers about that *if* they aren't | |
1233 | * going to see a redist for the new entry. | |
1234 | */ | |
1235 | if (!new_selected || CHECK_FLAG(old_selected->status, | |
1236 | ROUTE_ENTRY_REMOVED)) | |
1237 | redistribute_delete(p, src_p, | |
1238 | old_selected, | |
1239 | new_selected); | |
1240 | ||
d62a17ae | 1241 | if (old_selected != new_selected) |
1242 | UNSET_FLAG(old_selected->flags, | |
1243 | ZEBRA_FLAG_SELECTED); | |
f857321e | 1244 | } |
d62a17ae | 1245 | } |
3e5c6e00 | 1246 | |
d62a17ae | 1247 | /* Remove all RE entries queued for removal */ |
a2addae8 | 1248 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 1249 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { |
1250 | if (IS_ZEBRA_DEBUG_RIB) { | |
1251 | rnode_debug(rn, vrf_id, "rn %p, removing re %p", | |
1252 | (void *)rn, (void *)re); | |
1253 | } | |
1254 | rib_unlink(rn, re); | |
1255 | } | |
1256 | } | |
4d38fdb4 | 1257 | |
d62a17ae | 1258 | /* |
1259 | * Check if the dest can be deleted now. | |
1260 | */ | |
1261 | rib_gc_dest(rn); | |
e96f9203 DO |
1262 | } |
1263 | ||
a1494c25 DS |
1264 | static void zebra_rib_evaluate_mpls(struct route_node *rn) |
1265 | { | |
1266 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
1267 | struct zebra_vrf *zvrf = vrf_info_lookup(VRF_DEFAULT); | |
1268 | ||
1269 | if (!dest) | |
1270 | return; | |
1271 | ||
1272 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_LSPS)) { | |
1273 | if (IS_ZEBRA_DEBUG_MPLS) | |
1274 | zlog_debug( | |
bd47f3a3 JU |
1275 | "%s(%u): Scheduling all LSPs upon RIB completion", |
1276 | zvrf_name(zvrf), zvrf_id(zvrf)); | |
a1494c25 DS |
1277 | zebra_mpls_lsp_schedule(zvrf); |
1278 | mpls_unmark_lsps_for_processing(rn); | |
1279 | } | |
1280 | } | |
1281 | ||
e5ac2adf MS |
1282 | /* |
1283 | * Utility to match route with dplane context data | |
1284 | */ | |
1285 | static bool rib_route_match_ctx(const struct route_entry *re, | |
25779064 MS |
1286 | const struct zebra_dplane_ctx *ctx, |
1287 | bool is_update) | |
e5ac2adf MS |
1288 | { |
1289 | bool result = false; | |
1290 | ||
1291 | if (is_update) { | |
1292 | /* | |
1293 | * In 'update' case, we test info about the 'previous' or | |
1294 | * 'old' route | |
1295 | */ | |
1296 | if ((re->type == dplane_ctx_get_old_type(ctx)) && | |
1297 | (re->instance == dplane_ctx_get_old_instance(ctx))) { | |
1298 | result = true; | |
1299 | ||
9db35a5e MS |
1300 | /* We use an extra test for statics, and another for |
1301 | * kernel routes. | |
e5ac2adf MS |
1302 | */ |
1303 | if (re->type == ZEBRA_ROUTE_STATIC && | |
1304 | (re->distance != dplane_ctx_get_old_distance(ctx) || | |
1305 | re->tag != dplane_ctx_get_old_tag(ctx))) { | |
1306 | result = false; | |
9db35a5e MS |
1307 | } else if (re->type == ZEBRA_ROUTE_KERNEL && |
1308 | re->metric != | |
1309 | dplane_ctx_get_old_metric(ctx)) { | |
1310 | result = false; | |
e5ac2adf MS |
1311 | } |
1312 | } | |
1313 | ||
1314 | } else { | |
1315 | /* | |
1316 | * Ordinary, single-route case using primary context info | |
1317 | */ | |
1318 | if ((dplane_ctx_get_op(ctx) != DPLANE_OP_ROUTE_DELETE) && | |
1319 | CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
1320 | /* Skip route that's been deleted */ | |
1321 | goto done; | |
1322 | } | |
1323 | ||
1324 | if ((re->type == dplane_ctx_get_type(ctx)) && | |
1325 | (re->instance == dplane_ctx_get_instance(ctx))) { | |
1326 | result = true; | |
1327 | ||
9db35a5e MS |
1328 | /* We use an extra test for statics, and another for |
1329 | * kernel routes. | |
e5ac2adf MS |
1330 | */ |
1331 | if (re->type == ZEBRA_ROUTE_STATIC && | |
1332 | (re->distance != dplane_ctx_get_distance(ctx) || | |
1333 | re->tag != dplane_ctx_get_tag(ctx))) { | |
1334 | result = false; | |
9db35a5e MS |
1335 | } else if (re->type == ZEBRA_ROUTE_KERNEL && |
1336 | re->metric != dplane_ctx_get_metric(ctx)) { | |
1337 | result = false; | |
1338 | } else if (re->type == ZEBRA_ROUTE_CONNECT) { | |
1339 | result = nexthop_group_equal_no_recurse( | |
1340 | &re->nhe->nhg, dplane_ctx_get_ng(ctx)); | |
e5ac2adf MS |
1341 | } |
1342 | } | |
1343 | } | |
1344 | ||
1345 | done: | |
1346 | ||
1347 | return (result); | |
1348 | } | |
1349 | ||
3cdba47a DS |
1350 | static void zebra_rib_fixup_system(struct route_node *rn) |
1351 | { | |
1352 | struct route_entry *re; | |
1353 | ||
1354 | RNODE_FOREACH_RE(rn, re) { | |
1355 | struct nexthop *nhop; | |
1356 | ||
1357 | if (!RIB_SYSTEM_ROUTE(re)) | |
1358 | continue; | |
1359 | ||
1360 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
1361 | continue; | |
1362 | ||
1363 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
6d0ee6a0 | 1364 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); |
3cdba47a | 1365 | |
c415d895 | 1366 | for (ALL_NEXTHOPS(re->nhe->nhg, nhop)) { |
3cdba47a DS |
1367 | if (CHECK_FLAG(nhop->flags, NEXTHOP_FLAG_RECURSIVE)) |
1368 | continue; | |
1369 | ||
1370 | SET_FLAG(nhop->flags, NEXTHOP_FLAG_FIB); | |
1371 | } | |
1372 | } | |
1373 | } | |
1374 | ||
9db35a5e MS |
1375 | /* Route comparison logic, with various special cases. */ |
1376 | static bool rib_compare_routes(const struct route_entry *re1, | |
1377 | const struct route_entry *re2) | |
1378 | { | |
9db35a5e MS |
1379 | if (re1->type != re2->type) |
1380 | return false; | |
1381 | ||
1382 | if (re1->instance != re2->instance) | |
1383 | return false; | |
1384 | ||
1385 | if (re1->type == ZEBRA_ROUTE_KERNEL && re1->metric != re2->metric) | |
1386 | return false; | |
1387 | ||
1388 | if (CHECK_FLAG(re1->flags, ZEBRA_FLAG_RR_USE_DISTANCE) && | |
1389 | re1->distance != re2->distance) | |
1390 | return false; | |
1391 | ||
87009d7d MS |
1392 | /* We support multiple connected routes: this supports multiple |
1393 | * v6 link-locals, and we also support multiple addresses in the same | |
1394 | * subnet on a single interface. | |
1395 | */ | |
9db35a5e MS |
1396 | if (re1->type != ZEBRA_ROUTE_CONNECT) |
1397 | return true; | |
1398 | ||
87009d7d | 1399 | return false; |
9db35a5e MS |
1400 | } |
1401 | ||
9959f1da MS |
1402 | /* |
1403 | * Compare nexthop lists from a route and a dplane context; test whether | |
1404 | * the list installed in the FIB matches the route's list. | |
1405 | * Set 'changed_p' to 'true' if there were changes to the route's | |
1406 | * installed nexthops. | |
1407 | * | |
1408 | * Return 'false' if any ACTIVE route nexthops are not mentioned in the FIB | |
1409 | * list. | |
1410 | */ | |
1411 | static bool rib_update_nhg_from_ctx(struct nexthop_group *re_nhg, | |
1412 | const struct nexthop_group *ctx_nhg, | |
1413 | bool *changed_p) | |
1414 | { | |
1415 | bool matched_p = true; | |
1416 | struct nexthop *nexthop, *ctx_nexthop; | |
1417 | ||
1418 | /* Get the first `installed` one to check against. | |
1419 | * If the dataplane doesn't set these to be what was actually installed, | |
1420 | * it will just be whatever was in re->nhe->nhg? | |
1421 | */ | |
1422 | ctx_nexthop = ctx_nhg->nexthop; | |
1423 | ||
1424 | if (CHECK_FLAG(ctx_nexthop->flags, NEXTHOP_FLAG_RECURSIVE) | |
1425 | || !CHECK_FLAG(ctx_nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1426 | ctx_nexthop = nexthop_next_active_resolved(ctx_nexthop); | |
1427 | ||
1428 | for (ALL_NEXTHOPS_PTR(re_nhg, nexthop)) { | |
1429 | ||
1430 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1431 | continue; | |
1432 | ||
1433 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1434 | continue; | |
1435 | ||
1436 | /* Check for a FIB nexthop corresponding to the RIB nexthop */ | |
7483dcbe | 1437 | if (!nexthop_same(ctx_nexthop, nexthop)) { |
9959f1da MS |
1438 | /* If the FIB doesn't know about the nexthop, |
1439 | * it's not installed | |
1440 | */ | |
1441 | if (IS_ZEBRA_DEBUG_RIB_DETAILED || | |
1442 | IS_ZEBRA_DEBUG_NHG_DETAIL) { | |
1443 | zlog_debug("%s: no ctx match for rib nh %pNHv %s", | |
1444 | __func__, nexthop, | |
1445 | (CHECK_FLAG(nexthop->flags, | |
1446 | NEXTHOP_FLAG_FIB) ? | |
1447 | "(FIB)":"")); | |
1448 | } | |
1449 | matched_p = false; | |
1450 | ||
1451 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1452 | *changed_p = true; | |
1453 | ||
1454 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1455 | ||
1456 | /* Keep checking nexthops */ | |
1457 | continue; | |
1458 | } | |
1459 | ||
1460 | if (CHECK_FLAG(ctx_nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
1461 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
1462 | if (IS_ZEBRA_DEBUG_NHG_DETAIL) | |
1463 | zlog_debug("%s: rib nh %pNHv -> installed", | |
1464 | __func__, nexthop); | |
1465 | ||
1466 | *changed_p = true; | |
1467 | } | |
1468 | ||
1469 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1470 | } else { | |
1471 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
1472 | if (IS_ZEBRA_DEBUG_NHG_DETAIL) | |
1473 | zlog_debug("%s: rib nh %pNHv -> uninstalled", | |
1474 | __func__, nexthop); | |
1475 | ||
1476 | *changed_p = true; | |
1477 | } | |
1478 | ||
1479 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1480 | } | |
1481 | ||
1482 | ctx_nexthop = nexthop_next_active_resolved(ctx_nexthop); | |
1483 | } | |
1484 | ||
1485 | return matched_p; | |
1486 | } | |
1487 | ||
e5ac2adf | 1488 | /* |
78bf56b0 MS |
1489 | * Update a route from a dplane context. This consolidates common code |
1490 | * that can be used in processing of results from FIB updates, and in | |
1491 | * async notification processing. | |
efe6c026 | 1492 | * The return is 'true' if the installed nexthops changed; 'false' otherwise. |
e5ac2adf | 1493 | */ |
efe6c026 MS |
1494 | static bool rib_update_re_from_ctx(struct route_entry *re, |
1495 | struct route_node *rn, | |
1496 | struct zebra_dplane_ctx *ctx) | |
78bf56b0 | 1497 | { |
941e261c | 1498 | char dest_str[PREFIX_STRLEN] = ""; |
9959f1da | 1499 | struct nexthop *nexthop; |
941e261c MS |
1500 | bool matched; |
1501 | const struct nexthop_group *ctxnhg; | |
9959f1da | 1502 | struct nexthop_group *re_nhg; |
efe6c026 MS |
1503 | bool is_selected = false; /* Is 're' currently the selected re? */ |
1504 | bool changed_p = false; /* Change to nexthops? */ | |
1505 | rib_dest_t *dest; | |
bd47f3a3 JU |
1506 | struct vrf *vrf; |
1507 | ||
1508 | vrf = vrf_lookup_by_id(re->vrf_id); | |
78bf56b0 | 1509 | |
941e261c MS |
1510 | /* Note well: only capturing the prefix string if debug is enabled here; |
1511 | * unconditional log messages will have to generate the string. | |
1512 | */ | |
1513 | if (IS_ZEBRA_DEBUG_RIB) | |
1514 | prefix2str(&(rn->p), dest_str, sizeof(dest_str)); | |
78bf56b0 | 1515 | |
efe6c026 MS |
1516 | dest = rib_dest_from_rnode(rn); |
1517 | if (dest) | |
1518 | is_selected = (re == dest->selected_fib); | |
1519 | ||
1520 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
c2c02b76 DS |
1521 | zlog_debug("update_from_ctx: %s(%u:%u):%s: %sSELECTED, re %p", |
1522 | VRF_LOGNAME(vrf), re->vrf_id, re->table, dest_str, | |
9db35a5e | 1523 | (is_selected ? "" : "NOT "), re); |
efe6c026 MS |
1524 | |
1525 | /* Update zebra's nexthop FIB flag for each nexthop that was installed. | |
941e261c | 1526 | * If the installed set differs from the set requested by the rib/owner, |
efe6c026 MS |
1527 | * we use the fib-specific nexthop-group to record the actual FIB |
1528 | * status. | |
78bf56b0 | 1529 | */ |
a126f120 MS |
1530 | matched = false; |
1531 | ctxnhg = dplane_ctx_get_ng(ctx); | |
941e261c | 1532 | |
9959f1da | 1533 | /* Check route's fib group and incoming notif group for equivalence. |
986a6617 SW |
1534 | * |
1535 | * Let's assume the nexthops are ordered here to save time. | |
941e261c | 1536 | */ |
9959f1da MS |
1537 | /* TODO -- this isn't testing or comparing the FIB flags; we should |
1538 | * do a more explicit loop, checking the incoming notification's flags. | |
1539 | */ | |
a126f120 MS |
1540 | if (re->fib_ng.nexthop && ctxnhg->nexthop && |
1541 | nexthop_group_equal(&re->fib_ng, ctxnhg)) | |
986a6617 | 1542 | matched = true; |
941e261c MS |
1543 | |
1544 | /* If the new FIB set matches the existing FIB set, we're done. */ | |
1545 | if (matched) { | |
1546 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 | 1547 | zlog_debug( |
c2c02b76 DS |
1548 | "%s(%u:%u):%s update_from_ctx(): existing fib nhg, no change", |
1549 | VRF_LOGNAME(vrf), re->vrf_id, re->table, | |
1550 | dest_str); | |
9959f1da | 1551 | goto check_backups; |
941e261c | 1552 | |
7483dcbe | 1553 | } else if (CHECK_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG)) { |
941e261c MS |
1554 | /* |
1555 | * Free stale fib list and move on to check the rib nhg. | |
1556 | */ | |
1557 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 | 1558 | zlog_debug( |
c2c02b76 DS |
1559 | "%s(%u:%u):%s update_from_ctx(): replacing fib nhg", |
1560 | VRF_LOGNAME(vrf), re->vrf_id, re->table, | |
1561 | dest_str); | |
941e261c MS |
1562 | nexthops_free(re->fib_ng.nexthop); |
1563 | re->fib_ng.nexthop = NULL; | |
efe6c026 | 1564 | |
7483dcbe MS |
1565 | UNSET_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG); |
1566 | ||
efe6c026 MS |
1567 | /* Note that the installed nexthops have changed */ |
1568 | changed_p = true; | |
941e261c MS |
1569 | } else { |
1570 | if (IS_ZEBRA_DEBUG_RIB) | |
c2c02b76 DS |
1571 | zlog_debug("%s(%u:%u):%s update_from_ctx(): no fib nhg", |
1572 | VRF_LOGNAME(vrf), re->vrf_id, re->table, | |
1573 | dest_str); | |
941e261c MS |
1574 | } |
1575 | ||
1576 | /* | |
1577 | * Compare with the rib nexthop group. The comparison here is different: | |
1578 | * the RIB group may be a superset of the list installed in the FIB. We | |
1579 | * walk the RIB group, looking for the 'installable' candidate | |
1580 | * nexthops, and then check those against the set | |
1581 | * that is actually installed. | |
986a6617 SW |
1582 | * |
1583 | * Assume nexthops are ordered here as well. | |
941e261c | 1584 | */ |
986a6617 | 1585 | |
9959f1da | 1586 | /* If nothing is installed, we can skip some of the checking/comparison |
1f6a5aca MS |
1587 | * of nexthops. |
1588 | */ | |
9959f1da | 1589 | if (ctxnhg->nexthop == NULL) { |
1f6a5aca MS |
1590 | changed_p = true; |
1591 | goto no_nexthops; | |
1592 | } | |
1593 | ||
9959f1da | 1594 | matched = rib_update_nhg_from_ctx(&(re->nhe->nhg), ctxnhg, &changed_p); |
78bf56b0 | 1595 | |
941e261c MS |
1596 | /* If all nexthops were processed, we're done */ |
1597 | if (matched) { | |
1598 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 | 1599 | zlog_debug( |
c2c02b76 DS |
1600 | "%s(%u:%u):%s update_from_ctx(): rib nhg matched, changed '%s'", |
1601 | VRF_LOGNAME(vrf), re->vrf_id, re->table, | |
1602 | dest_str, (changed_p ? "true" : "false")); | |
9959f1da | 1603 | goto check_backups; |
941e261c | 1604 | } |
78bf56b0 | 1605 | |
1f6a5aca MS |
1606 | no_nexthops: |
1607 | ||
941e261c MS |
1608 | /* FIB nexthop set differs from the RIB set: |
1609 | * create a fib-specific nexthop-group | |
1610 | */ | |
1611 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 | 1612 | zlog_debug( |
c2c02b76 DS |
1613 | "%s(%u:%u):%s update_from_ctx(): changed %s, adding new fib nhg%s", |
1614 | VRF_LOGNAME(vrf), re->vrf_id, re->table, dest_str, | |
7483dcbe MS |
1615 | (changed_p ? "true" : "false"), |
1616 | ctxnhg->nexthop != NULL ? "" : " (empty)"); | |
941e261c | 1617 | |
7483dcbe MS |
1618 | /* Set the flag about the dedicated fib list */ |
1619 | SET_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG); | |
188a00e0 MS |
1620 | if (ctxnhg->nexthop) |
1621 | copy_nexthops(&(re->fib_ng.nexthop), ctxnhg->nexthop, NULL); | |
941e261c | 1622 | |
9959f1da MS |
1623 | check_backups: |
1624 | ||
1625 | /* | |
1626 | * Check the status of the route's backup nexthops, if any. | |
1627 | * The logic for backups is somewhat different: if any backup is | |
1628 | * installed, a new fib nhg will be attached to the route. | |
1629 | */ | |
1630 | re_nhg = zebra_nhg_get_backup_nhg(re->nhe); | |
1631 | if (re_nhg == NULL) | |
1632 | goto done; /* No backup nexthops */ | |
1633 | ||
1634 | /* First check the route's 'fib' list of backups, if it's present | |
1635 | * from some previous event. | |
1636 | */ | |
1637 | re_nhg = &re->fib_backup_ng; | |
1638 | ctxnhg = dplane_ctx_get_backup_ng(ctx); | |
1639 | ||
1640 | matched = false; | |
1641 | if (re_nhg->nexthop && ctxnhg && nexthop_group_equal(re_nhg, ctxnhg)) | |
1642 | matched = true; | |
1643 | ||
1644 | /* If the new FIB set matches an existing FIB set, we're done. */ | |
1645 | if (matched) { | |
1646 | if (IS_ZEBRA_DEBUG_RIB) | |
1647 | zlog_debug( | |
1648 | "%s(%u):%s update_from_ctx(): existing fib backup nhg, no change", | |
1649 | VRF_LOGNAME(vrf), re->vrf_id, dest_str); | |
1650 | goto done; | |
1651 | ||
1652 | } else if (re->fib_backup_ng.nexthop) { | |
1653 | /* | |
1654 | * Free stale fib backup list and move on to check | |
1655 | * the route's backups. | |
1656 | */ | |
1657 | if (IS_ZEBRA_DEBUG_RIB) | |
1658 | zlog_debug( | |
1659 | "%s(%u):%s update_from_ctx(): replacing fib backup nhg", | |
1660 | VRF_LOGNAME(vrf), re->vrf_id, dest_str); | |
1661 | nexthops_free(re->fib_backup_ng.nexthop); | |
1662 | re->fib_backup_ng.nexthop = NULL; | |
1663 | ||
1664 | /* Note that the installed nexthops have changed */ | |
1665 | changed_p = true; | |
1666 | } else { | |
1667 | if (IS_ZEBRA_DEBUG_RIB) | |
1668 | zlog_debug("%s(%u):%s update_from_ctx(): no fib backup nhg", | |
1669 | VRF_LOGNAME(vrf), re->vrf_id, dest_str); | |
1670 | } | |
1671 | ||
1672 | /* | |
7483dcbe | 1673 | * If a FIB backup nexthop set exists, attach a copy |
9959f1da MS |
1674 | * to the route if any backup is installed |
1675 | */ | |
1676 | if (ctxnhg && ctxnhg->nexthop) { | |
1677 | ||
1678 | for (ALL_NEXTHOPS_PTR(ctxnhg, nexthop)) { | |
1679 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1680 | break; | |
1681 | } | |
1682 | ||
1683 | /* If no installed backups, we're done */ | |
1684 | if (nexthop == NULL) | |
1685 | goto done; | |
1686 | ||
1687 | if (IS_ZEBRA_DEBUG_RIB) | |
1688 | zlog_debug("%s(%u):%s update_from_ctx(): changed %s, adding new backup fib nhg", | |
1689 | VRF_LOGNAME(vrf), re->vrf_id, dest_str, | |
1690 | (changed_p ? "true" : "false")); | |
1691 | ||
1692 | copy_nexthops(&(re->fib_backup_ng.nexthop), ctxnhg->nexthop, | |
1693 | NULL); | |
1694 | } | |
1695 | ||
941e261c | 1696 | done: |
9959f1da | 1697 | |
efe6c026 | 1698 | return changed_p; |
78bf56b0 MS |
1699 | } |
1700 | ||
e5ac2adf | 1701 | /* |
fad4d69c MS |
1702 | * Helper to locate a zebra route-node from a dplane context. This is used |
1703 | * when processing dplane results, e.g. Note well: the route-node is returned | |
1704 | * with a ref held - route_unlock_node() must be called eventually. | |
e5ac2adf | 1705 | */ |
fad4d69c MS |
1706 | static struct route_node * |
1707 | rib_find_rn_from_ctx(const struct zebra_dplane_ctx *ctx) | |
e5ac2adf MS |
1708 | { |
1709 | struct route_table *table = NULL; | |
1710 | struct route_node *rn = NULL; | |
e5ac2adf MS |
1711 | const struct prefix *dest_pfx, *src_pfx; |
1712 | ||
1713 | /* Locate rn and re(s) from ctx */ | |
1714 | ||
c7c0b007 SW |
1715 | table = zebra_vrf_lookup_table_with_table_id( |
1716 | dplane_ctx_get_afi(ctx), dplane_ctx_get_safi(ctx), | |
1717 | dplane_ctx_get_vrf(ctx), dplane_ctx_get_table(ctx)); | |
e5ac2adf MS |
1718 | if (table == NULL) { |
1719 | if (IS_ZEBRA_DEBUG_DPLANE) { | |
bd47f3a3 JU |
1720 | zlog_debug( |
1721 | "Failed to find route for ctx: no table for afi %d, safi %d, vrf %s(%u)", | |
1722 | dplane_ctx_get_afi(ctx), | |
1723 | dplane_ctx_get_safi(ctx), | |
1724 | vrf_id_to_name(dplane_ctx_get_vrf(ctx)), | |
1725 | dplane_ctx_get_vrf(ctx)); | |
e5ac2adf MS |
1726 | } |
1727 | goto done; | |
1728 | } | |
1729 | ||
fad4d69c MS |
1730 | dest_pfx = dplane_ctx_get_dest(ctx); |
1731 | src_pfx = dplane_ctx_get_src(ctx); | |
1732 | ||
1733 | rn = srcdest_rnode_get(table, dest_pfx, | |
1734 | src_pfx ? (struct prefix_ipv6 *)src_pfx : NULL); | |
1735 | ||
1736 | done: | |
1737 | return rn; | |
1738 | } | |
1739 | ||
1740 | ||
97f5b441 | 1741 | |
fad4d69c MS |
1742 | /* |
1743 | * Route-update results processing after async dataplane update. | |
1744 | */ | |
1745 | static void rib_process_result(struct zebra_dplane_ctx *ctx) | |
1746 | { | |
1747 | struct zebra_vrf *zvrf = NULL; | |
bd47f3a3 | 1748 | struct vrf *vrf; |
fad4d69c MS |
1749 | struct route_node *rn = NULL; |
1750 | struct route_entry *re = NULL, *old_re = NULL, *rib; | |
1751 | bool is_update = false; | |
1752 | char dest_str[PREFIX_STRLEN] = ""; | |
1753 | enum dplane_op_e op; | |
1754 | enum zebra_dplane_result status; | |
1755 | const struct prefix *dest_pfx, *src_pfx; | |
1756 | uint32_t seq; | |
9db35a5e | 1757 | rib_dest_t *dest; |
efe6c026 | 1758 | bool fib_changed = false; |
97f5b441 | 1759 | |
fad4d69c | 1760 | zvrf = vrf_info_lookup(dplane_ctx_get_vrf(ctx)); |
bd47f3a3 | 1761 | vrf = vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); |
e5ac2adf MS |
1762 | dest_pfx = dplane_ctx_get_dest(ctx); |
1763 | ||
1764 | /* Note well: only capturing the prefix string if debug is enabled here; | |
1765 | * unconditional log messages will have to generate the string. | |
1766 | */ | |
5709131c | 1767 | if (IS_ZEBRA_DEBUG_DPLANE) |
e5ac2adf | 1768 | prefix2str(dest_pfx, dest_str, sizeof(dest_str)); |
e5ac2adf | 1769 | |
fad4d69c MS |
1770 | /* Locate rn and re(s) from ctx */ |
1771 | rn = rib_find_rn_from_ctx(ctx); | |
e5ac2adf MS |
1772 | if (rn == NULL) { |
1773 | if (IS_ZEBRA_DEBUG_DPLANE) { | |
bd47f3a3 JU |
1774 | zlog_debug( |
1775 | "Failed to process dplane results: no route for %s(%u):%s", | |
1776 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), | |
1777 | dest_str); | |
e5ac2adf MS |
1778 | } |
1779 | goto done; | |
1780 | } | |
1781 | ||
9db35a5e | 1782 | dest = rib_dest_from_rnode(rn); |
e5ac2adf MS |
1783 | srcdest_rnode_prefixes(rn, &dest_pfx, &src_pfx); |
1784 | ||
1785 | op = dplane_ctx_get_op(ctx); | |
1786 | status = dplane_ctx_get_status(ctx); | |
1787 | ||
c831033f | 1788 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) |
bd47f3a3 | 1789 | zlog_debug( |
c2c02b76 DS |
1790 | "%s(%u:%u):%s Processing dplane result ctx %p, op %s result %s", |
1791 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), | |
1792 | dplane_ctx_get_table(ctx), dest_str, ctx, | |
1793 | dplane_op2str(op), dplane_res2str(status)); | |
e5ac2adf | 1794 | |
e5ac2adf MS |
1795 | /* |
1796 | * Update is a bit of a special case, where we may have both old and new | |
1797 | * routes to post-process. | |
1798 | */ | |
1799 | is_update = dplane_ctx_is_update(ctx); | |
1800 | ||
1801 | /* | |
1802 | * Take a pass through the routes, look for matches with the context | |
1803 | * info. | |
1804 | */ | |
1805 | RNODE_FOREACH_RE(rn, rib) { | |
1806 | ||
1807 | if (re == NULL) { | |
5709131c | 1808 | if (rib_route_match_ctx(rib, ctx, false)) |
e5ac2adf | 1809 | re = rib; |
e5ac2adf MS |
1810 | } |
1811 | ||
1812 | /* Check for old route match */ | |
1813 | if (is_update && (old_re == NULL)) { | |
5709131c | 1814 | if (rib_route_match_ctx(rib, ctx, true /*is_update*/)) |
e5ac2adf | 1815 | old_re = rib; |
e5ac2adf MS |
1816 | } |
1817 | ||
1818 | /* Have we found the routes we need to work on? */ | |
5709131c | 1819 | if (re && ((!is_update || old_re))) |
e5ac2adf | 1820 | break; |
e5ac2adf MS |
1821 | } |
1822 | ||
699dae23 DS |
1823 | seq = dplane_ctx_get_seq(ctx); |
1824 | ||
e5ac2adf MS |
1825 | /* |
1826 | * Check sequence number(s) to detect stale results before continuing | |
1827 | */ | |
60f98b23 | 1828 | if (re) { |
699dae23 | 1829 | if (re->dplane_sequence != seq) { |
60f98b23 | 1830 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) |
bd47f3a3 JU |
1831 | zlog_debug( |
1832 | "%s(%u):%s Stale dplane result for re %p", | |
1833 | VRF_LOGNAME(vrf), | |
1834 | dplane_ctx_get_vrf(ctx), dest_str, re); | |
60f98b23 DS |
1835 | } else |
1836 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); | |
e5ac2adf MS |
1837 | } |
1838 | ||
60f98b23 DS |
1839 | if (old_re) { |
1840 | if (old_re->dplane_sequence != dplane_ctx_get_old_seq(ctx)) { | |
1841 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) | |
bd47f3a3 | 1842 | zlog_debug( |
c2c02b76 | 1843 | "%s(%u:%u):%s Stale dplane result for old_re %p", |
bd47f3a3 | 1844 | VRF_LOGNAME(vrf), |
c2c02b76 DS |
1845 | dplane_ctx_get_vrf(ctx), old_re->table, |
1846 | dest_str, old_re); | |
60f98b23 | 1847 | } else |
9ef0c6ba | 1848 | UNSET_FLAG(old_re->status, ROUTE_ENTRY_QUEUED); |
e5ac2adf MS |
1849 | } |
1850 | ||
12e7fe3a | 1851 | switch (op) { |
12e7fe3a DS |
1852 | case DPLANE_OP_ROUTE_INSTALL: |
1853 | case DPLANE_OP_ROUTE_UPDATE: | |
1854 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
677c1dd5 DS |
1855 | if (re) { |
1856 | UNSET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
1857 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
1858 | } | |
b9f0e5ee DS |
1859 | /* |
1860 | * On an update operation from the same route type | |
1861 | * context retrieval currently has no way to know | |
1862 | * which was the old and which was the new. | |
1863 | * So don't unset our flags that we just set. | |
1864 | * We know redistribution is ok because the | |
1865 | * old_re in this case is used for nothing | |
1866 | * more than knowing whom to contact if necessary. | |
1867 | */ | |
1868 | if (old_re && old_re != re) { | |
677c1dd5 DS |
1869 | UNSET_FLAG(old_re->status, ROUTE_ENTRY_FAILED); |
1870 | UNSET_FLAG(old_re->status, | |
1871 | ROUTE_ENTRY_INSTALLED); | |
1872 | } | |
f183e380 | 1873 | |
78bf56b0 | 1874 | /* Update zebra route based on the results in |
941e261c | 1875 | * the context struct. |
78bf56b0 | 1876 | */ |
941e261c | 1877 | if (re) { |
efe6c026 MS |
1878 | fib_changed = |
1879 | rib_update_re_from_ctx(re, rn, ctx); | |
1880 | ||
1881 | if (!fib_changed) { | |
1882 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) | |
bd47f3a3 | 1883 | zlog_debug( |
c2c02b76 | 1884 | "%s(%u:%u):%s no fib change for re", |
bd47f3a3 JU |
1885 | VRF_LOGNAME(vrf), |
1886 | dplane_ctx_get_vrf(ctx), | |
c2c02b76 DS |
1887 | dplane_ctx_get_table( |
1888 | ctx), | |
bd47f3a3 | 1889 | dest_str); |
12e7fe3a DS |
1890 | } |
1891 | ||
9db35a5e MS |
1892 | /* Redistribute if this is the selected re */ |
1893 | if (dest && re == dest->selected_fib) | |
1894 | redistribute_update(dest_pfx, src_pfx, | |
1895 | re, old_re); | |
f183e380 MS |
1896 | } |
1897 | ||
3cdba47a DS |
1898 | /* |
1899 | * System routes are weird in that they | |
1900 | * allow multiple to be installed that match | |
1901 | * to the same prefix, so after we get the | |
1902 | * result we need to clean them up so that | |
1903 | * we can actually use them. | |
1904 | */ | |
1905 | if ((re && RIB_SYSTEM_ROUTE(re)) || | |
1906 | (old_re && RIB_SYSTEM_ROUTE(old_re))) | |
1907 | zebra_rib_fixup_system(rn); | |
1908 | ||
f4c6e2a8 | 1909 | if (zvrf) |
12e7fe3a | 1910 | zvrf->installs++; |
f183e380 | 1911 | |
12e7fe3a | 1912 | /* Notify route owner */ |
677c1dd5 | 1913 | zsend_route_notify_owner_ctx(ctx, ZAPI_ROUTE_INSTALLED); |
e5ac2adf | 1914 | |
12e7fe3a | 1915 | } else { |
7a230a9d | 1916 | if (re) { |
677c1dd5 | 1917 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); |
7a230a9d DS |
1918 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
1919 | } if (old_re) | |
677c1dd5 DS |
1920 | SET_FLAG(old_re->status, ROUTE_ENTRY_FAILED); |
1921 | if (re) | |
1922 | zsend_route_notify_owner(re, dest_pfx, | |
1923 | ZAPI_ROUTE_FAIL_INSTALL); | |
97f5b441 | 1924 | |
2dbe669b | 1925 | zlog_warn("%s(%u:%u):%pFX: Route install failed", |
bd47f3a3 | 1926 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2dbe669b | 1927 | dplane_ctx_get_table(ctx), dest_pfx); |
12e7fe3a DS |
1928 | } |
1929 | break; | |
1930 | case DPLANE_OP_ROUTE_DELETE: | |
677c1dd5 DS |
1931 | if (re) |
1932 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
12e7fe3a DS |
1933 | /* |
1934 | * In the delete case, the zebra core datastructs were | |
1935 | * updated (or removed) at the time the delete was issued, | |
1936 | * so we're just notifying the route owner. | |
e5ac2adf | 1937 | */ |
12e7fe3a | 1938 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { |
677c1dd5 DS |
1939 | if (re) { |
1940 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
1941 | UNSET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
1942 | } | |
12e7fe3a | 1943 | zsend_route_notify_owner_ctx(ctx, ZAPI_ROUTE_REMOVED); |
e5ac2adf | 1944 | |
12e7fe3a DS |
1945 | if (zvrf) |
1946 | zvrf->removals++; | |
1947 | } else { | |
677c1dd5 DS |
1948 | if (re) |
1949 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
12e7fe3a DS |
1950 | zsend_route_notify_owner_ctx(ctx, |
1951 | ZAPI_ROUTE_REMOVE_FAIL); | |
e5ac2adf | 1952 | |
2dbe669b | 1953 | zlog_warn("%s(%u:%u):%pFX: Route Deletion failure", |
bd47f3a3 | 1954 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2dbe669b | 1955 | dplane_ctx_get_table(ctx), dest_pfx); |
12e7fe3a | 1956 | } |
3cdba47a DS |
1957 | |
1958 | /* | |
1959 | * System routes are weird in that they | |
1960 | * allow multiple to be installed that match | |
1961 | * to the same prefix, so after we get the | |
1962 | * result we need to clean them up so that | |
1963 | * we can actually use them. | |
1964 | */ | |
1965 | if ((re && RIB_SYSTEM_ROUTE(re)) || | |
1966 | (old_re && RIB_SYSTEM_ROUTE(old_re))) | |
1967 | zebra_rib_fixup_system(rn); | |
12e7fe3a | 1968 | break; |
d37f4d6c MS |
1969 | default: |
1970 | break; | |
e5ac2adf | 1971 | } |
699dae23 DS |
1972 | |
1973 | zebra_rib_evaluate_rn_nexthops(rn, seq); | |
a1494c25 | 1974 | zebra_rib_evaluate_mpls(rn); |
e5ac2adf MS |
1975 | done: |
1976 | ||
5f27bcba DS |
1977 | if (rn) |
1978 | route_unlock_node(rn); | |
1979 | ||
e5ac2adf MS |
1980 | /* Return context to dataplane module */ |
1981 | dplane_ctx_fini(&ctx); | |
1982 | } | |
1983 | ||
9959f1da MS |
1984 | /* |
1985 | * Count installed/FIB nexthops | |
1986 | */ | |
1987 | static int rib_count_installed_nh(struct route_entry *re) | |
1988 | { | |
1989 | int count = 0; | |
1990 | struct nexthop *nexthop; | |
1991 | struct nexthop_group *nhg; | |
1992 | ||
1993 | nhg = rib_get_fib_nhg(re); | |
1994 | ||
1995 | for (ALL_NEXTHOPS_PTR(nhg, nexthop)) { | |
1996 | /* The meaningful flag depends on where the installed | |
1997 | * nexthops reside. | |
1998 | */ | |
43a9f66c | 1999 | if (nhg == &(re->fib_ng)) { |
9959f1da MS |
2000 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) |
2001 | count++; | |
2002 | } else { | |
2003 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
2004 | count++; | |
2005 | } | |
2006 | } | |
2007 | ||
43a9f66c MS |
2008 | nhg = rib_get_fib_backup_nhg(re); |
2009 | if (nhg) { | |
2010 | for (ALL_NEXTHOPS_PTR(nhg, nexthop)) { | |
2011 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
2012 | count++; | |
2013 | } | |
9959f1da MS |
2014 | } |
2015 | ||
2016 | return count; | |
2017 | } | |
2018 | ||
54818e3b MS |
2019 | /* |
2020 | * Handle notification from async dataplane: the dataplane has detected | |
2021 | * some change to a route, and notifies zebra so that the control plane | |
2022 | * can reflect that change. | |
2023 | */ | |
2024 | static void rib_process_dplane_notify(struct zebra_dplane_ctx *ctx) | |
2025 | { | |
2026 | struct route_node *rn = NULL; | |
efe6c026 | 2027 | struct route_entry *re = NULL; |
bd47f3a3 | 2028 | struct vrf *vrf; |
efe6c026 | 2029 | struct nexthop *nexthop; |
54818e3b MS |
2030 | char dest_str[PREFIX_STRLEN] = ""; |
2031 | const struct prefix *dest_pfx, *src_pfx; | |
941e261c | 2032 | rib_dest_t *dest; |
efe6c026 | 2033 | bool fib_changed = false; |
941e261c | 2034 | bool debug_p = IS_ZEBRA_DEBUG_DPLANE | IS_ZEBRA_DEBUG_RIB; |
efe6c026 | 2035 | int start_count, end_count; |
54818e3b | 2036 | dest_pfx = dplane_ctx_get_dest(ctx); |
bd47f3a3 | 2037 | vrf = vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); |
54818e3b MS |
2038 | |
2039 | /* Note well: only capturing the prefix string if debug is enabled here; | |
2040 | * unconditional log messages will have to generate the string. | |
2041 | */ | |
941e261c | 2042 | if (debug_p) |
54818e3b MS |
2043 | prefix2str(dest_pfx, dest_str, sizeof(dest_str)); |
2044 | ||
2045 | /* Locate rn and re(s) from ctx */ | |
2046 | rn = rib_find_rn_from_ctx(ctx); | |
2047 | if (rn == NULL) { | |
941e261c | 2048 | if (debug_p) { |
bd47f3a3 | 2049 | zlog_debug( |
c2c02b76 | 2050 | "Failed to process dplane notification: no routes for %s(%u:%u):%s", |
bd47f3a3 | 2051 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
c2c02b76 | 2052 | dplane_ctx_get_table(ctx), dest_str); |
54818e3b MS |
2053 | } |
2054 | goto done; | |
2055 | } | |
2056 | ||
941e261c | 2057 | dest = rib_dest_from_rnode(rn); |
54818e3b MS |
2058 | srcdest_rnode_prefixes(rn, &dest_pfx, &src_pfx); |
2059 | ||
efe6c026 | 2060 | if (debug_p) |
c2c02b76 DS |
2061 | zlog_debug("%s(%u:%u):%s Processing dplane notif ctx %p", |
2062 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), | |
2063 | dplane_ctx_get_table(ctx), dest_str, ctx); | |
54818e3b MS |
2064 | |
2065 | /* | |
2066 | * Take a pass through the routes, look for matches with the context | |
2067 | * info. | |
2068 | */ | |
efe6c026 MS |
2069 | RNODE_FOREACH_RE(rn, re) { |
2070 | if (rib_route_match_ctx(re, ctx, false /*!update*/)) | |
54818e3b MS |
2071 | break; |
2072 | } | |
2073 | ||
2074 | /* No match? Nothing we can do */ | |
2075 | if (re == NULL) { | |
941e261c | 2076 | if (debug_p) |
bd47f3a3 | 2077 | zlog_debug( |
c2c02b76 | 2078 | "%s(%u:%u):%s Unable to process dplane notification: no entry for type %s", |
bd47f3a3 | 2079 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
c2c02b76 | 2080 | dplane_ctx_get_table(ctx), dest_str, |
bd47f3a3 | 2081 | zebra_route_string(dplane_ctx_get_type(ctx))); |
54818e3b MS |
2082 | |
2083 | goto done; | |
2084 | } | |
2085 | ||
272e8903 MS |
2086 | /* Ensure we clear the QUEUED flag */ |
2087 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); | |
2088 | ||
4c0b5436 MS |
2089 | /* Is this a notification that ... matters? We mostly care about |
2090 | * the route that is currently selected for installation; we may also | |
2091 | * get an un-install notification, and handle that too. | |
941e261c MS |
2092 | */ |
2093 | if (re != dest->selected_fib) { | |
4c0b5436 MS |
2094 | /* |
2095 | * If we need to, clean up after a delete that was part of | |
2096 | * an update operation. | |
941e261c | 2097 | */ |
4c0b5436 MS |
2098 | end_count = 0; |
2099 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2100 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
2101 | end_count++; | |
2102 | } | |
2103 | ||
2104 | /* If no nexthops or none installed, ensure that this re | |
2105 | * gets its 'installed' flag cleared. | |
2106 | */ | |
2107 | if (end_count == 0) { | |
2108 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED)) | |
2109 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
2110 | if (debug_p) | |
bd47f3a3 | 2111 | zlog_debug( |
c2c02b76 | 2112 | "%s(%u:%u):%s dplane notif, uninstalled type %s route", |
bd47f3a3 | 2113 | VRF_LOGNAME(vrf), |
c2c02b76 DS |
2114 | dplane_ctx_get_vrf(ctx), |
2115 | dplane_ctx_get_table(ctx), dest_str, | |
bd47f3a3 JU |
2116 | zebra_route_string( |
2117 | dplane_ctx_get_type(ctx))); | |
4c0b5436 MS |
2118 | } else { |
2119 | /* At least report on the event. */ | |
2120 | if (debug_p) | |
bd47f3a3 | 2121 | zlog_debug( |
c2c02b76 | 2122 | "%s(%u:%u):%s dplane notif, but type %s not selected_fib", |
bd47f3a3 | 2123 | VRF_LOGNAME(vrf), |
c2c02b76 DS |
2124 | dplane_ctx_get_vrf(ctx), |
2125 | dplane_ctx_get_table(ctx), dest_str, | |
bd47f3a3 JU |
2126 | zebra_route_string( |
2127 | dplane_ctx_get_type(ctx))); | |
4c0b5436 | 2128 | } |
941e261c MS |
2129 | goto done; |
2130 | } | |
2131 | ||
efe6c026 MS |
2132 | /* We'll want to determine whether the installation status of the |
2133 | * route has changed: we'll check the status before processing, | |
2134 | * and then again if there's been a change. | |
2135 | */ | |
2136 | start_count = 0; | |
1c30d64b | 2137 | |
9959f1da MS |
2138 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED)) |
2139 | start_count = rib_count_installed_nh(re); | |
efe6c026 | 2140 | |
54818e3b MS |
2141 | /* Update zebra's nexthop FIB flags based on the context struct's |
2142 | * nexthops. | |
2143 | */ | |
efe6c026 | 2144 | fib_changed = rib_update_re_from_ctx(re, rn, ctx); |
54818e3b | 2145 | |
efe6c026 MS |
2146 | if (!fib_changed) { |
2147 | if (debug_p) | |
bd47f3a3 | 2148 | zlog_debug( |
c2c02b76 | 2149 | "%s(%u:%u):%s dplane notification: rib_update returns FALSE", |
bd47f3a3 | 2150 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
c2c02b76 | 2151 | dplane_ctx_get_table(ctx), dest_str); |
54818e3b MS |
2152 | } |
2153 | ||
188a00e0 MS |
2154 | /* |
2155 | * Perform follow-up work if the actual status of the prefix | |
efe6c026 | 2156 | * changed. |
941e261c | 2157 | */ |
9959f1da | 2158 | end_count = rib_count_installed_nh(re); |
941e261c | 2159 | |
188a00e0 MS |
2160 | /* Various fib transitions: changed nexthops; from installed to |
2161 | * not-installed; or not-installed to installed. | |
efe6c026 | 2162 | */ |
188a00e0 | 2163 | if (start_count > 0 && end_count > 0) { |
11260e70 | 2164 | if (debug_p) |
bd47f3a3 | 2165 | zlog_debug( |
c2c02b76 | 2166 | "%s(%u:%u):%s applied nexthop changes from dplane notification", |
bd47f3a3 | 2167 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
c2c02b76 | 2168 | dplane_ctx_get_table(ctx), dest_str); |
188a00e0 MS |
2169 | |
2170 | /* Changed nexthops - update kernel/others */ | |
2171 | dplane_route_notif_update(rn, re, | |
2172 | DPLANE_OP_ROUTE_UPDATE, ctx); | |
2173 | ||
2174 | } else if (start_count == 0 && end_count > 0) { | |
efe6c026 | 2175 | if (debug_p) |
bd47f3a3 | 2176 | zlog_debug( |
c2c02b76 | 2177 | "%s(%u:%u):%s installed transition from dplane notification", |
bd47f3a3 | 2178 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
c2c02b76 | 2179 | dplane_ctx_get_table(ctx), dest_str); |
efe6c026 MS |
2180 | |
2181 | /* We expect this to be the selected route, so we want | |
272e8903 | 2182 | * to tell others about this transition. |
efe6c026 MS |
2183 | */ |
2184 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
2185 | ||
188a00e0 | 2186 | /* Changed nexthops - update kernel/others */ |
9959f1da | 2187 | dplane_route_notif_update(rn, re, DPLANE_OP_ROUTE_UPDATE, ctx); |
188a00e0 | 2188 | |
efe6c026 MS |
2189 | /* Redistribute, lsp, and nht update */ |
2190 | redistribute_update(dest_pfx, src_pfx, re, NULL); | |
2191 | ||
efe6c026 MS |
2192 | } else if (start_count > 0 && end_count == 0) { |
2193 | if (debug_p) | |
bd47f3a3 | 2194 | zlog_debug( |
c2c02b76 | 2195 | "%s(%u:%u):%s un-installed transition from dplane notification", |
bd47f3a3 | 2196 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
c2c02b76 | 2197 | dplane_ctx_get_table(ctx), dest_str); |
efe6c026 MS |
2198 | |
2199 | /* Transition from _something_ installed to _nothing_ | |
2200 | * installed. | |
2201 | */ | |
2202 | /* We expect this to be the selected route, so we want | |
2203 | * to tell others about this transistion. | |
2204 | */ | |
2205 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
2206 | ||
188a00e0 MS |
2207 | /* Changed nexthops - update kernel/others */ |
2208 | dplane_route_notif_update(rn, re, DPLANE_OP_ROUTE_DELETE, ctx); | |
2209 | ||
efe6c026 | 2210 | /* Redistribute, lsp, and nht update */ |
40f321c0 | 2211 | redistribute_delete(dest_pfx, src_pfx, re, NULL); |
9287b4c5 | 2212 | } |
efe6c026 | 2213 | |
9287b4c5 MS |
2214 | /* Make any changes visible for lsp and nexthop-tracking processing */ |
2215 | zebra_rib_evaluate_rn_nexthops( | |
2216 | rn, zebra_router_get_next_sequence()); | |
efe6c026 | 2217 | |
9287b4c5 | 2218 | zebra_rib_evaluate_mpls(rn); |
941e261c | 2219 | |
54818e3b | 2220 | done: |
941e261c MS |
2221 | if (rn) |
2222 | route_unlock_node(rn); | |
2223 | ||
54818e3b MS |
2224 | /* Return context to dataplane module */ |
2225 | dplane_ctx_fini(&ctx); | |
2226 | } | |
2227 | ||
e22e8001 | 2228 | static void process_subq_nhg(struct listnode *lnode) |
e96f9203 | 2229 | { |
e22e8001 SW |
2230 | struct nhg_ctx *ctx = NULL; |
2231 | uint8_t qindex = route_info[ZEBRA_ROUTE_NHG].meta_q_map; | |
5110a0c6 | 2232 | |
e22e8001 SW |
2233 | ctx = listgetdata(lnode); |
2234 | ||
2235 | if (!ctx) | |
2236 | return; | |
2237 | ||
2238 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2239 | zlog_debug("NHG Context id=%u dequeued from sub-queue %u", | |
2240 | ctx->id, qindex); | |
2241 | ||
2242 | rib_nhg_process(ctx); | |
2243 | } | |
2244 | ||
2245 | static void process_subq_route(struct listnode *lnode, uint8_t qindex) | |
2246 | { | |
2247 | struct route_node *rnode = NULL; | |
2248 | rib_dest_t *dest = NULL; | |
2249 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 | 2250 | |
d62a17ae | 2251 | rnode = listgetdata(lnode); |
2252 | dest = rib_dest_from_rnode(rnode); | |
c2c02b76 DS |
2253 | assert(dest); |
2254 | ||
2255 | zvrf = rib_dest_vrf(dest); | |
41ec9222 | 2256 | |
d62a17ae | 2257 | rib_process(rnode); |
5110a0c6 | 2258 | |
d62a17ae | 2259 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { |
7e26b9d4 | 2260 | struct route_entry *re = NULL; |
d62a17ae | 2261 | char buf[SRCDEST2STR_BUFFER]; |
efe6c026 | 2262 | |
7e26b9d4 DS |
2263 | /* |
2264 | * rib_process may have freed the dest | |
2265 | * as part of the garbage collection. Let's | |
2266 | * prevent stupidity from happening. | |
2267 | */ | |
2268 | dest = rib_dest_from_rnode(rnode); | |
2269 | if (dest) | |
2270 | re = re_list_first(&dest->routes); | |
2271 | ||
d62a17ae | 2272 | srcdest_rnode2str(rnode, buf, sizeof(buf)); |
c2c02b76 DS |
2273 | zlog_debug("%s(%u:%u):%s: rn %p dequeued from sub-queue %u", |
2274 | zvrf_name(zvrf), zvrf_id(zvrf), re ? re->table : 0, buf, | |
2275 | rnode, qindex); | |
d62a17ae | 2276 | } |
41ec9222 | 2277 | |
d62a17ae | 2278 | if (rnode->info) |
2279 | UNSET_FLAG(rib_dest_from_rnode(rnode)->flags, | |
2280 | RIB_ROUTE_QUEUED(qindex)); | |
9fd92e3c | 2281 | |
67b9467f | 2282 | #if 0 |
5110a0c6 SH |
2283 | else |
2284 | { | |
2285 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
c10e14e9 | 2286 | __func__, rnode, route_node_get_lock_count(rnode)); |
5110a0c6 SH |
2287 | zlog_backtrace(LOG_DEBUG); |
2288 | } | |
67b9467f | 2289 | #endif |
d62a17ae | 2290 | route_unlock_node(rnode); |
e22e8001 SW |
2291 | } |
2292 | ||
2293 | /* Take a list of route_node structs and return 1, if there was a record | |
2294 | * picked from it and processed by rib_process(). Don't process more, | |
2295 | * than one RN record; operate only in the specified sub-queue. | |
2296 | */ | |
2297 | static unsigned int process_subq(struct list *subq, uint8_t qindex) | |
2298 | { | |
2299 | struct listnode *lnode = listhead(subq); | |
2300 | ||
2301 | if (!lnode) | |
2302 | return 0; | |
2303 | ||
2304 | if (qindex == route_info[ZEBRA_ROUTE_NHG].meta_q_map) | |
2305 | process_subq_nhg(lnode); | |
2306 | else | |
2307 | process_subq_route(lnode, qindex); | |
2308 | ||
d62a17ae | 2309 | list_delete_node(subq, lnode); |
e22e8001 | 2310 | |
d62a17ae | 2311 | return 1; |
e96f9203 DO |
2312 | } |
2313 | ||
2314 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from | |
d62a17ae | 2315 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and |
2316 | * data | |
e96f9203 DO |
2317 | * is pointed to the meta queue structure. |
2318 | */ | |
d62a17ae | 2319 | static wq_item_status meta_queue_process(struct work_queue *dummy, void *data) |
e96f9203 | 2320 | { |
d62a17ae | 2321 | struct meta_queue *mq = data; |
2322 | unsigned i; | |
91f16812 MS |
2323 | uint32_t queue_len, queue_limit; |
2324 | ||
2325 | /* Ensure there's room for more dataplane updates */ | |
2326 | queue_limit = dplane_get_in_queue_limit(); | |
2327 | queue_len = dplane_get_in_queue_len(); | |
2328 | if (queue_len > queue_limit) { | |
2329 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
8b962e77 MS |
2330 | zlog_debug("rib queue: dplane queue len %u, limit %u, retrying", |
2331 | queue_len, queue_limit); | |
91f16812 MS |
2332 | |
2333 | /* Ensure that the meta-queue is actually enqueued */ | |
489a9614 | 2334 | if (work_queue_empty(zrouter.ribq)) |
ea45a4e7 | 2335 | work_queue_add(zrouter.ribq, zrouter.mq); |
91f16812 MS |
2336 | |
2337 | return WQ_QUEUE_BLOCKED; | |
2338 | } | |
5110a0c6 | 2339 | |
d62a17ae | 2340 | for (i = 0; i < MQ_SIZE; i++) |
2341 | if (process_subq(mq->subq[i], i)) { | |
2342 | mq->size--; | |
2343 | break; | |
2344 | } | |
2345 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; | |
e96f9203 DO |
2346 | } |
2347 | ||
f52ed677 DS |
2348 | |
2349 | /* | |
2350 | * Look into the RN and queue it into the highest priority queue | |
2351 | * at this point in time for processing. | |
2352 | * | |
2353 | * We will enqueue a route node only once per invocation. | |
2354 | * | |
2355 | * There are two possibilities here that should be kept in mind. | |
2356 | * If the original invocation has not been pulled off for processing | |
2357 | * yet, A subsuquent invocation can have a route entry with a better | |
2358 | * meta queue index value and we can have a situation where | |
2359 | * we might have the same node enqueued 2 times. Not necessarily | |
2360 | * an optimal situation but it should be ok. | |
2361 | * | |
2362 | * The other possibility is that the original invocation has not | |
2363 | * been pulled off for processing yet, A subsusquent invocation | |
2364 | * doesn't have a route_entry with a better meta-queue and the | |
2365 | * original metaqueue index value will win and we'll end up with | |
2366 | * the route node enqueued once. | |
e96f9203 | 2367 | */ |
e22e8001 | 2368 | static int rib_meta_queue_add(struct meta_queue *mq, void *data) |
e96f9203 | 2369 | { |
e22e8001 | 2370 | struct route_node *rn = NULL; |
f52ed677 DS |
2371 | struct route_entry *re = NULL, *curr_re = NULL; |
2372 | uint8_t qindex = MQ_SIZE, curr_qindex = MQ_SIZE; | |
5110a0c6 | 2373 | |
e22e8001 SW |
2374 | rn = (struct route_node *)data; |
2375 | ||
f52ed677 DS |
2376 | RNODE_FOREACH_RE (rn, curr_re) { |
2377 | curr_qindex = route_info[curr_re->type].meta_q_map; | |
d62a17ae | 2378 | |
f52ed677 DS |
2379 | if (curr_qindex <= qindex) { |
2380 | re = curr_re; | |
2381 | qindex = curr_qindex; | |
d62a17ae | 2382 | } |
f52ed677 | 2383 | } |
5110a0c6 | 2384 | |
f52ed677 | 2385 | if (!re) |
e22e8001 | 2386 | return -1; |
5110a0c6 | 2387 | |
f52ed677 DS |
2388 | /* Invariant: at this point we always have rn->info set. */ |
2389 | if (CHECK_FLAG(rib_dest_from_rnode(rn)->flags, | |
2390 | RIB_ROUTE_QUEUED(qindex))) { | |
d62a17ae | 2391 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2392 | rnode_debug(rn, re->vrf_id, | |
f52ed677 | 2393 | "rn %p is already queued in sub-queue %u", |
d62a17ae | 2394 | (void *)rn, qindex); |
e22e8001 | 2395 | return -1; |
d62a17ae | 2396 | } |
f52ed677 DS |
2397 | |
2398 | SET_FLAG(rib_dest_from_rnode(rn)->flags, RIB_ROUTE_QUEUED(qindex)); | |
2399 | listnode_add(mq->subq[qindex], rn); | |
2400 | route_lock_node(rn); | |
2401 | mq->size++; | |
2402 | ||
2403 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2404 | rnode_debug(rn, re->vrf_id, "queued rn %p into sub-queue %u", | |
2405 | (void *)rn, qindex); | |
e22e8001 SW |
2406 | |
2407 | return 0; | |
4d38fdb4 | 2408 | } |
2409 | ||
e22e8001 | 2410 | static int rib_meta_queue_nhg_add(struct meta_queue *mq, void *data) |
4d38fdb4 | 2411 | { |
e22e8001 SW |
2412 | struct nhg_ctx *ctx = NULL; |
2413 | uint8_t qindex = route_info[ZEBRA_ROUTE_NHG].meta_q_map; | |
fc328ac9 | 2414 | |
e22e8001 SW |
2415 | ctx = (struct nhg_ctx *)data; |
2416 | ||
2417 | if (!ctx) | |
2418 | return -1; | |
4d38fdb4 | 2419 | |
e22e8001 SW |
2420 | listnode_add(mq->subq[qindex], ctx); |
2421 | mq->size++; | |
2422 | ||
2423 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2424 | zlog_debug("NHG Context id=%u queued into sub-queue %u", | |
2425 | ctx->id, qindex); | |
2426 | ||
2427 | return 0; | |
2428 | } | |
2429 | ||
2430 | static int mq_add_handler(void *data, | |
2431 | int (*mq_add_func)(struct meta_queue *mq, void *data)) | |
2432 | { | |
489a9614 | 2433 | if (zrouter.ribq == NULL) { |
e914ccbe | 2434 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2435 | "%s: work_queue does not exist!", __func__); |
e22e8001 | 2436 | return -1; |
d62a17ae | 2437 | } |
2438 | ||
2439 | /* | |
2440 | * The RIB queue should normally be either empty or holding the only | |
2441 | * work_queue_item element. In the latter case this element would | |
2442 | * hold a pointer to the meta queue structure, which must be used to | |
2443 | * actually queue the route nodes to process. So create the MQ | |
2444 | * holder, if necessary, then push the work into it in any case. | |
2445 | * This semantics was introduced after 0.99.9 release. | |
2446 | */ | |
489a9614 | 2447 | if (work_queue_empty(zrouter.ribq)) |
ea45a4e7 | 2448 | work_queue_add(zrouter.ribq, zrouter.mq); |
e96f9203 | 2449 | |
e22e8001 SW |
2450 | return mq_add_func(zrouter.mq, data); |
2451 | } | |
fc328ac9 | 2452 | |
e22e8001 SW |
2453 | /* Add route_node to work queue and schedule processing */ |
2454 | int rib_queue_add(struct route_node *rn) | |
2455 | { | |
2456 | assert(rn); | |
2457 | ||
2458 | /* Pointless to queue a route_node with no RIB entries to add or remove | |
2459 | */ | |
2460 | if (!rnode_to_ribs(rn)) { | |
c10e14e9 DS |
2461 | zlog_debug("%s: called for route_node (%p, %u) with no ribs", |
2462 | __func__, (void *)rn, route_node_get_lock_count(rn)); | |
e22e8001 SW |
2463 | zlog_backtrace(LOG_DEBUG); |
2464 | return -1; | |
2465 | } | |
2466 | ||
2467 | return mq_add_handler(rn, &rib_meta_queue_add); | |
2468 | } | |
2469 | ||
2470 | int rib_queue_nhg_add(struct nhg_ctx *ctx) | |
2471 | { | |
2472 | assert(ctx); | |
2473 | ||
2474 | return mq_add_handler(ctx, &rib_meta_queue_nhg_add); | |
4d38fdb4 | 2475 | } |
2476 | ||
5110a0c6 SH |
2477 | /* Create new meta queue. |
2478 | A destructor function doesn't seem to be necessary here. | |
2479 | */ | |
d62a17ae | 2480 | static struct meta_queue *meta_queue_new(void) |
e96f9203 | 2481 | { |
d62a17ae | 2482 | struct meta_queue *new; |
2483 | unsigned i; | |
5110a0c6 | 2484 | |
d62a17ae | 2485 | new = XCALLOC(MTYPE_WORK_QUEUE, sizeof(struct meta_queue)); |
e96f9203 | 2486 | |
d62a17ae | 2487 | for (i = 0; i < MQ_SIZE; i++) { |
2488 | new->subq[i] = list_new(); | |
2489 | assert(new->subq[i]); | |
2490 | } | |
5110a0c6 | 2491 | |
d62a17ae | 2492 | return new; |
e96f9203 DO |
2493 | } |
2494 | ||
d62a17ae | 2495 | void meta_queue_free(struct meta_queue *mq) |
5a8dfcd8 | 2496 | { |
d62a17ae | 2497 | unsigned i; |
5a8dfcd8 | 2498 | |
d62a17ae | 2499 | for (i = 0; i < MQ_SIZE; i++) |
6a154c88 | 2500 | list_delete(&mq->subq[i]); |
5a8dfcd8 | 2501 | |
d62a17ae | 2502 | XFREE(MTYPE_WORK_QUEUE, mq); |
5a8dfcd8 RW |
2503 | } |
2504 | ||
4d38fdb4 | 2505 | /* initialise zebra rib work queue */ |
2561d12e | 2506 | static void rib_queue_init(void) |
4d38fdb4 | 2507 | { |
489a9614 DS |
2508 | if (!(zrouter.ribq = work_queue_new(zrouter.master, |
2509 | "route_node processing"))) { | |
e914ccbe | 2510 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2511 | "%s: could not initialise work queue!", __func__); |
d62a17ae | 2512 | return; |
2513 | } | |
4d38fdb4 | 2514 | |
d62a17ae | 2515 | /* fill in the work queue spec */ |
489a9614 DS |
2516 | zrouter.ribq->spec.workfunc = &meta_queue_process; |
2517 | zrouter.ribq->spec.errorfunc = NULL; | |
46a4e345 | 2518 | zrouter.ribq->spec.completion_func = NULL; |
d62a17ae | 2519 | /* XXX: TODO: These should be runtime configurable via vty */ |
489a9614 DS |
2520 | zrouter.ribq->spec.max_retries = 3; |
2521 | zrouter.ribq->spec.hold = ZEBRA_RIB_PROCESS_HOLD_TIME; | |
2522 | zrouter.ribq->spec.retry = ZEBRA_RIB_PROCESS_RETRY_TIME; | |
d62a17ae | 2523 | |
ea45a4e7 | 2524 | if (!(zrouter.mq = meta_queue_new())) { |
e914ccbe | 2525 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2526 | "%s: could not initialise meta queue!", __func__); |
d62a17ae | 2527 | return; |
2528 | } | |
2529 | return; | |
718e3744 | 2530 | } |
2531 | ||
434434f7 DS |
2532 | rib_dest_t *zebra_rib_create_dest(struct route_node *rn) |
2533 | { | |
2534 | rib_dest_t *dest; | |
2535 | ||
2536 | dest = XCALLOC(MTYPE_RIB_DEST, sizeof(rib_dest_t)); | |
aa57abfb | 2537 | rnh_list_init(&dest->nht); |
daaeaa21 | 2538 | re_list_init(&dest->routes); |
434434f7 DS |
2539 | route_lock_node(rn); /* rn route table reference */ |
2540 | rn->info = dest; | |
2541 | dest->rnode = rn; | |
2542 | ||
2543 | return dest; | |
2544 | } | |
2545 | ||
6d691129 PJ |
2546 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2547 | * | |
2548 | * The queue length is bounded by the maximal size of the routing table, | |
2549 | * as a route_node will not be requeued, if already queued. | |
2550 | * | |
f0f77c9a DS |
2551 | * REs are submitted via rib_addnode or rib_delnode which set minimal |
2552 | * state, or static_install_route (when an existing RE is updated) | |
3c0755dc | 2553 | * and then submit route_node to queue for best-path selection later. |
f0f77c9a | 2554 | * Order of add/delete state changes are preserved for any given RE. |
6d691129 | 2555 | * |
f0f77c9a | 2556 | * Deleted REs are reaped during best-path selection. |
6d691129 PJ |
2557 | * |
2558 | * rib_addnode | |
f0f77c9a DS |
2559 | * |-> rib_link or unset ROUTE_ENTRY_REMOVE |->Update kernel with |
2560 | * |-------->| | best RE, if required | |
3c0755dc PJ |
2561 | * | | |
2562 | * static_install->|->rib_addqueue...... -> rib_process | |
2563 | * | | | |
2564 | * |-------->| |-> rib_unlink | |
f0f77c9a DS |
2565 | * |-> set ROUTE_ENTRY_REMOVE | |
2566 | * rib_delnode (RE freed) | |
6d691129 | 2567 | * |
9fd92e3c AS |
2568 | * The 'info' pointer of a route_node points to a rib_dest_t |
2569 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2570 | * dest is created on-demand by rib_link() and is kept around at least | |
2571 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
d62a17ae | 2572 | * |
6d691129 PJ |
2573 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): |
2574 | * | |
2575 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2576 | * - dest attached to route_node: |
2577 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2578 | * - route_node processing queue |
2579 | * - managed by: rib_addqueue, rib_process. | |
2580 | * | |
2581 | */ | |
d62a17ae | 2582 | |
f0f77c9a | 2583 | /* Add RE to head of the route node. */ |
d62a17ae | 2584 | static void rib_link(struct route_node *rn, struct route_entry *re, int process) |
2585 | { | |
d62a17ae | 2586 | rib_dest_t *dest; |
2587 | afi_t afi; | |
2588 | const char *rmap_name; | |
9fd92e3c | 2589 | |
d62a17ae | 2590 | assert(re && rn); |
9fd92e3c | 2591 | |
d62a17ae | 2592 | dest = rib_dest_from_rnode(rn); |
2593 | if (!dest) { | |
2594 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2595 | rnode_debug(rn, re->vrf_id, "rn %p adding dest", rn); | |
7a4bb9c5 | 2596 | |
434434f7 | 2597 | dest = zebra_rib_create_dest(rn); |
d62a17ae | 2598 | } |
2263a412 | 2599 | |
045207e2 | 2600 | re_list_add_head(&dest->routes, re); |
d62a17ae | 2601 | |
2602 | afi = (rn->p.family == AF_INET) | |
2603 | ? AFI_IP | |
2604 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
fe257ae7 DS |
2605 | if (is_zebra_import_table_enabled(afi, re->vrf_id, re->table)) { |
2606 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(re->vrf_id); | |
2607 | ||
d62a17ae | 2608 | rmap_name = zebra_get_import_table_route_map(afi, re->table); |
fe257ae7 | 2609 | zebra_add_import_table_entry(zvrf, rn, re, rmap_name); |
d62a17ae | 2610 | } else if (process) |
2611 | rib_queue_add(rn); | |
2612 | } | |
2613 | ||
7e24fdf3 DS |
2614 | static void rib_addnode(struct route_node *rn, |
2615 | struct route_entry *re, int process) | |
d62a17ae | 2616 | { |
2617 | /* RE node has been un-removed before route-node is processed. | |
2618 | * route_node must hence already be on the queue for processing.. | |
2619 | */ | |
2620 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
2621 | if (IS_ZEBRA_DEBUG_RIB) | |
2622 | rnode_debug(rn, re->vrf_id, "rn %p, un-removed re %p", | |
2623 | (void *)rn, (void *)re); | |
2624 | ||
2625 | UNSET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2626 | return; | |
2627 | } | |
2628 | rib_link(rn, re, process); | |
6d691129 PJ |
2629 | } |
2630 | ||
9fd92e3c AS |
2631 | /* |
2632 | * rib_unlink | |
2633 | * | |
2634 | * Detach a rib structure from a route_node. | |
2635 | * | |
2636 | * Note that a call to rib_unlink() should be followed by a call to | |
2637 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2638 | * longer required to be deleted. | |
2639 | */ | |
d62a17ae | 2640 | void rib_unlink(struct route_node *rn, struct route_entry *re) |
6d691129 | 2641 | { |
d62a17ae | 2642 | rib_dest_t *dest; |
9fd92e3c | 2643 | |
d62a17ae | 2644 | assert(rn && re); |
6d691129 | 2645 | |
d62a17ae | 2646 | if (IS_ZEBRA_DEBUG_RIB) |
2647 | rnode_debug(rn, re->vrf_id, "rn %p, re %p", (void *)rn, | |
2648 | (void *)re); | |
6d691129 | 2649 | |
d62a17ae | 2650 | dest = rib_dest_from_rnode(rn); |
6d691129 | 2651 | |
045207e2 | 2652 | re_list_del(&dest->routes, re); |
7a4bb9c5 | 2653 | |
2eb07de3 DS |
2654 | if (dest->selected_fib == re) |
2655 | dest->selected_fib = NULL; | |
2656 | ||
1d48702e MS |
2657 | if (re->nhe && re->nhe_id) { |
2658 | assert(re->nhe->id == re->nhe_id); | |
2659 | zebra_nhg_decrement_ref(re->nhe); | |
2660 | } else if (re->nhe && re->nhe->nhg.nexthop) | |
c415d895 | 2661 | nexthops_free(re->nhe->nhg.nexthop); |
22bcedb2 | 2662 | |
ee5e8a48 MS |
2663 | nexthops_free(re->fib_ng.nexthop); |
2664 | ||
d62a17ae | 2665 | XFREE(MTYPE_RE, re); |
2666 | } | |
2667 | ||
2668 | void rib_delnode(struct route_node *rn, struct route_entry *re) | |
2669 | { | |
2670 | afi_t afi; | |
2671 | ||
2672 | if (IS_ZEBRA_DEBUG_RIB) | |
2673 | rnode_debug(rn, re->vrf_id, "rn %p, re %p, removing", | |
2674 | (void *)rn, (void *)re); | |
2675 | SET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2676 | ||
2677 | afi = (rn->p.family == AF_INET) | |
2678 | ? AFI_IP | |
2679 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
fe257ae7 DS |
2680 | if (is_zebra_import_table_enabled(afi, re->vrf_id, re->table)) { |
2681 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(re->vrf_id); | |
2682 | ||
2683 | zebra_del_import_table_entry(zvrf, rn, re); | |
d62a17ae | 2684 | /* Just clean up if non main table */ |
2685 | if (IS_ZEBRA_DEBUG_RIB) { | |
2686 | char buf[SRCDEST2STR_BUFFER]; | |
2687 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bd47f3a3 JU |
2688 | zlog_debug("%s(%u):%s: Freeing route rn %p, re %p (%s)", |
2689 | vrf_id_to_name(re->vrf_id), re->vrf_id, buf, | |
2690 | rn, re, zebra_route_string(re->type)); | |
d62a17ae | 2691 | } |
7a4bb9c5 | 2692 | |
d62a17ae | 2693 | rib_unlink(rn, re); |
2694 | } else { | |
2695 | rib_queue_add(rn); | |
2696 | } | |
718e3744 | 2697 | } |
2698 | ||
6d81b590 MS |
2699 | /* |
2700 | * Helper that debugs a single nexthop within a route-entry | |
2701 | */ | |
2702 | static void _route_entry_dump_nh(const struct route_entry *re, | |
2703 | const char *straddr, | |
2704 | const struct nexthop *nexthop) | |
2705 | { | |
2706 | char nhname[PREFIX_STRLEN]; | |
2707 | char backup_str[50]; | |
2708 | char wgt_str[50]; | |
474aebd9 MS |
2709 | char temp_str[10]; |
2710 | int i; | |
6d81b590 MS |
2711 | struct interface *ifp; |
2712 | struct vrf *vrf = vrf_lookup_by_id(nexthop->vrf_id); | |
2713 | ||
2714 | switch (nexthop->type) { | |
2715 | case NEXTHOP_TYPE_BLACKHOLE: | |
772270f3 | 2716 | snprintf(nhname, sizeof(nhname), "Blackhole"); |
6d81b590 MS |
2717 | break; |
2718 | case NEXTHOP_TYPE_IFINDEX: | |
2719 | ifp = if_lookup_by_index(nexthop->ifindex, nexthop->vrf_id); | |
772270f3 QY |
2720 | snprintf(nhname, sizeof(nhname), "%s", |
2721 | ifp ? ifp->name : "Unknown"); | |
6d81b590 MS |
2722 | break; |
2723 | case NEXTHOP_TYPE_IPV4: | |
2724 | /* fallthrough */ | |
2725 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
2726 | inet_ntop(AF_INET, &nexthop->gate, nhname, INET6_ADDRSTRLEN); | |
2727 | break; | |
2728 | case NEXTHOP_TYPE_IPV6: | |
2729 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
2730 | inet_ntop(AF_INET6, &nexthop->gate, nhname, INET6_ADDRSTRLEN); | |
2731 | break; | |
2732 | } | |
2733 | ||
2734 | backup_str[0] = '\0'; | |
2735 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP)) { | |
474aebd9 MS |
2736 | snprintf(backup_str, sizeof(backup_str), "backup "); |
2737 | for (i = 0; i < nexthop->backup_num; i++) { | |
2738 | snprintf(temp_str, sizeof(temp_str), "%d, ", | |
2739 | nexthop->backup_idx[i]); | |
2740 | strlcat(backup_str, temp_str, sizeof(backup_str)); | |
2741 | } | |
6d81b590 MS |
2742 | } |
2743 | ||
2744 | wgt_str[0] = '\0'; | |
2745 | if (nexthop->weight) | |
2746 | snprintf(wgt_str, sizeof(wgt_str), "wgt %d,", nexthop->weight); | |
2747 | ||
2748 | zlog_debug("%s: %s %s[%u] vrf %s(%u) %s%s with flags %s%s%s%s%s", | |
2749 | straddr, (nexthop->rparent ? " NH" : "NH"), nhname, | |
2750 | nexthop->ifindex, vrf ? vrf->name : "Unknown", | |
2751 | nexthop->vrf_id, | |
2752 | wgt_str, backup_str, | |
2753 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE) | |
2754 | ? "ACTIVE " | |
2755 | : ""), | |
2756 | (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED) | |
2757 | ? "FIB " | |
2758 | : ""), | |
2759 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE) | |
2760 | ? "RECURSIVE " | |
2761 | : ""), | |
2762 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK) | |
2763 | ? "ONLINK " | |
2764 | : ""), | |
2765 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_DUPLICATE) | |
2766 | ? "DUPLICATE " | |
2767 | : "")); | |
2768 | ||
2769 | } | |
2770 | ||
f0f77c9a | 2771 | /* This function dumps the contents of a given RE entry into |
dc95824a DO |
2772 | * standard debug log. Calling function name and IP prefix in |
2773 | * question are passed as 1st and 2nd arguments. | |
2774 | */ | |
d62a17ae | 2775 | void _route_entry_dump(const char *func, union prefixconstptr pp, |
2776 | union prefixconstptr src_pp, | |
2777 | const struct route_entry *re) | |
2778 | { | |
d62a17ae | 2779 | const struct prefix *src_p = src_pp.p; |
2780 | bool is_srcdst = src_p && src_p->prefixlen; | |
2781 | char straddr[PREFIX_STRLEN]; | |
2782 | char srcaddr[PREFIX_STRLEN]; | |
2783 | struct nexthop *nexthop; | |
c479e756 | 2784 | struct vrf *vrf = vrf_lookup_by_id(re->vrf_id); |
6d81b590 | 2785 | struct nexthop_group *nhg; |
d62a17ae | 2786 | |
c479e756 | 2787 | zlog_debug("%s: dumping RE entry %p for %s%s%s vrf %s(%u)", func, |
d62a17ae | 2788 | (const void *)re, prefix2str(pp, straddr, sizeof(straddr)), |
2789 | is_srcdst ? " from " : "", | |
2790 | is_srcdst ? prefix2str(src_pp, srcaddr, sizeof(srcaddr)) | |
2791 | : "", | |
c479e756 | 2792 | VRF_LOGNAME(vrf), re->vrf_id); |
cc54cfee | 2793 | zlog_debug("%s: uptime == %lu, type == %u, instance == %d, table == %d", |
53c16fbe | 2794 | straddr, (unsigned long)re->uptime, re->type, re->instance, |
cc54cfee | 2795 | re->table); |
6d81b590 MS |
2796 | zlog_debug("%s: metric == %u, mtu == %u, distance == %u, flags == %u, status == %u", |
2797 | straddr, re->metric, re->mtu, re->distance, re->flags, | |
2798 | re->status); | |
53c16fbe | 2799 | zlog_debug("%s: nexthop_num == %u, nexthop_active_num == %u", straddr, |
c415d895 MS |
2800 | nexthop_group_nexthop_num(&(re->nhe->nhg)), |
2801 | nexthop_group_active_nexthop_num(&(re->nhe->nhg))); | |
d62a17ae | 2802 | |
6d81b590 MS |
2803 | /* Dump nexthops */ |
2804 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) | |
2805 | _route_entry_dump_nh(re, straddr, nexthop); | |
2d68a0f2 | 2806 | |
6d81b590 MS |
2807 | if (zebra_nhg_get_backup_nhg(re->nhe)) { |
2808 | zlog_debug("%s: backup nexthops:", straddr); | |
2809 | ||
2810 | nhg = zebra_nhg_get_backup_nhg(re->nhe); | |
2811 | for (ALL_NEXTHOPS_PTR(nhg, nexthop)) | |
2812 | _route_entry_dump_nh(re, straddr, nexthop); | |
d62a17ae | 2813 | } |
6d81b590 | 2814 | |
53c16fbe | 2815 | zlog_debug("%s: dump complete", straddr); |
dc95824a DO |
2816 | } |
2817 | ||
6d81b590 MS |
2818 | /* |
2819 | * This is an exported helper to rtm_read() to dump the strange | |
f0f77c9a | 2820 | * RE entry found by rib_lookup_ipv4_route() |
dc95824a | 2821 | */ |
d62a17ae | 2822 | void rib_lookup_and_dump(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
2823 | { | |
2824 | struct route_table *table; | |
2825 | struct route_node *rn; | |
2826 | struct route_entry *re; | |
bd47f3a3 | 2827 | struct vrf *vrf; |
d62a17ae | 2828 | |
bd47f3a3 JU |
2829 | vrf = vrf_lookup_by_id(vrf_id); |
2830 | ||
d62a17ae | 2831 | /* Lookup table. */ |
2832 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
2833 | if (!table) { | |
e914ccbe | 2834 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
bd47f3a3 JU |
2835 | "%s:%s(%u) zebra_vrf_table() returned NULL", __func__, |
2836 | VRF_LOGNAME(vrf), vrf_id); | |
d62a17ae | 2837 | return; |
2838 | } | |
2839 | ||
2840 | /* Scan the RIB table for exactly matching RE entry. */ | |
2841 | rn = route_node_lookup(table, (struct prefix *)p); | |
2842 | ||
2843 | /* No route for this prefix. */ | |
2844 | if (!rn) { | |
2dbe669b DA |
2845 | zlog_debug("%s:%s(%u) lookup failed for %pFX", __func__, |
2846 | VRF_LOGNAME(vrf), vrf_id, (struct prefix *)p); | |
d62a17ae | 2847 | return; |
2848 | } | |
2849 | ||
2850 | /* Unlock node. */ | |
2851 | route_unlock_node(rn); | |
2852 | ||
2853 | /* let's go */ | |
a2addae8 | 2854 | RNODE_FOREACH_RE (rn, re) { |
bd47f3a3 JU |
2855 | zlog_debug("%s:%s(%u) rn %p, re %p: %s, %s", __func__, |
2856 | VRF_LOGNAME(vrf), vrf_id, (void *)rn, (void *)re, | |
d62a17ae | 2857 | (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED) |
2858 | ? "removed" | |
2859 | : "NOT removed"), | |
2860 | (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED) | |
2861 | ? "selected" | |
2862 | : "NOT selected")); | |
2863 | route_entry_dump(p, NULL, re); | |
2864 | } | |
dc95824a DO |
2865 | } |
2866 | ||
20e5ff0a DO |
2867 | /* Check if requested address assignment will fail due to another |
2868 | * route being installed by zebra in FIB already. Take necessary | |
2869 | * actions, if needed: remove such a route from FIB and deSELECT | |
f0f77c9a | 2870 | * corresponding RE entry. Then put affected RN into RIBQ head. |
20e5ff0a | 2871 | */ |
d62a17ae | 2872 | void rib_lookup_and_pushup(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
2873 | { | |
2874 | struct route_table *table; | |
2875 | struct route_node *rn; | |
5f7a4718 | 2876 | rib_dest_t *dest; |
d62a17ae | 2877 | |
2878 | if (NULL == (table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id))) { | |
bd47f3a3 JU |
2879 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); |
2880 | ||
e914ccbe | 2881 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
bd47f3a3 JU |
2882 | "%s:%s(%u) zebra_vrf_table() returned NULL", __func__, |
2883 | VRF_LOGNAME(vrf), vrf_id); | |
d62a17ae | 2884 | return; |
2885 | } | |
2886 | ||
2887 | /* No matches would be the simplest case. */ | |
2888 | if (NULL == (rn = route_node_lookup(table, (struct prefix *)p))) | |
2889 | return; | |
2890 | ||
2891 | /* Unlock node. */ | |
2892 | route_unlock_node(rn); | |
2893 | ||
5f7a4718 | 2894 | dest = rib_dest_from_rnode(rn); |
d62a17ae | 2895 | /* Check all RE entries. In case any changes have to be done, requeue |
2896 | * the RN into RIBQ head. If the routing message about the new connected | |
2897 | * route (generated by the IP address we are going to assign very soon) | |
2898 | * comes before the RIBQ is processed, the new RE entry will join | |
2899 | * RIBQ record already on head. This is necessary for proper | |
2900 | * revalidation | |
2901 | * of the rest of the RE. | |
2902 | */ | |
3cdba47a | 2903 | if (dest->selected_fib) { |
5f7a4718 | 2904 | if (IS_ZEBRA_DEBUG_RIB) { |
bd47f3a3 JU |
2905 | struct vrf *vrf = |
2906 | vrf_lookup_by_id(dest->selected_fib->vrf_id); | |
5f7a4718 | 2907 | |
bd47f3a3 | 2908 | zlog_debug( |
2dbe669b | 2909 | "%s(%u):%pFX: freeing way for connected prefix", |
bd47f3a3 | 2910 | VRF_LOGNAME(vrf), dest->selected_fib->vrf_id, |
2dbe669b | 2911 | &rn->p); |
5f7a4718 | 2912 | route_entry_dump(&rn->p, NULL, dest->selected_fib); |
d62a17ae | 2913 | } |
5f7a4718 | 2914 | rib_uninstall(rn, dest->selected_fib); |
d62a17ae | 2915 | rib_queue_add(rn); |
ade4a886 | 2916 | } |
20e5ff0a DO |
2917 | } |
2918 | ||
1d48702e MS |
2919 | /* |
2920 | * Internal route-add implementation; there are a couple of different public | |
2921 | * signatures. Callers in this path are responsible for the memory they | |
2922 | * allocate: if they allocate a nexthop_group or backup nexthop info, they | |
2923 | * must free those objects. If this returns < 0, an error has occurred and the | |
2924 | * route_entry 're' has not been captured; the caller should free that also. | |
2925 | */ | |
2926 | int rib_add_multipath_nhe(afi_t afi, safi_t safi, struct prefix *p, | |
6d81b590 | 2927 | struct prefix_ipv6 *src_p, struct route_entry *re, |
1d48702e | 2928 | struct nhg_hash_entry *re_nhe) |
718e3744 | 2929 | { |
98cda54a | 2930 | struct nhg_hash_entry *nhe = NULL; |
d62a17ae | 2931 | struct route_table *table; |
2932 | struct route_node *rn; | |
40ecd8e4 | 2933 | struct route_entry *same = NULL; |
d62a17ae | 2934 | int ret = 0; |
b4c034b0 | 2935 | |
1d48702e MS |
2936 | if (!re || !re_nhe) |
2937 | return -1; | |
b4c034b0 | 2938 | |
1f610a1f | 2939 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
05737783 | 2940 | |
d62a17ae | 2941 | /* Lookup table. */ |
c7c0b007 SW |
2942 | table = zebra_vrf_get_table_with_table_id(afi, safi, re->vrf_id, |
2943 | re->table); | |
1d48702e MS |
2944 | if (!table) |
2945 | return -1; | |
cddf391b | 2946 | |
50db3f2f SW |
2947 | if (re->nhe_id > 0) { |
2948 | nhe = zebra_nhg_lookup_id(re->nhe_id); | |
98cda54a SW |
2949 | |
2950 | if (!nhe) { | |
2951 | flog_err( | |
2952 | EC_ZEBRA_TABLE_LOOKUP_FAILED, | |
2953 | "Zebra failed to find the nexthop hash entry for id=%u in a route entry", | |
50db3f2f | 2954 | re->nhe_id); |
1d48702e | 2955 | |
98cda54a SW |
2956 | return -1; |
2957 | } | |
2958 | } else { | |
377e29f7 MS |
2959 | /* Lookup nhe from route information */ |
2960 | nhe = zebra_nhg_rib_find_nhe(re_nhe, afi); | |
98cda54a | 2961 | if (!nhe) { |
98cda54a SW |
2962 | char buf2[PREFIX_STRLEN] = ""; |
2963 | ||
2964 | flog_err( | |
2965 | EC_ZEBRA_TABLE_LOOKUP_FAILED, | |
2dbe669b DA |
2966 | "Zebra failed to find or create a nexthop hash entry for %pFX%s%s", |
2967 | p, src_p ? " from " : "", | |
98cda54a SW |
2968 | src_p ? prefix2str(src_p, buf2, sizeof(buf2)) |
2969 | : ""); | |
2970 | ||
98cda54a SW |
2971 | return -1; |
2972 | } | |
98cda54a SW |
2973 | } |
2974 | ||
4b87c90d SW |
2975 | /* |
2976 | * Attach the re to the nhe's nexthop group. | |
2977 | * | |
2978 | * TODO: This will need to change when we start getting IDs from upper | |
2979 | * level protocols, as the refcnt might be wrong, since it checks | |
2980 | * if old_id != new_id. | |
2981 | */ | |
5463ce26 | 2982 | route_entry_update_nhe(re, nhe); |
98cda54a | 2983 | |
d62a17ae | 2984 | /* Make it sure prefixlen is applied to the prefix. */ |
2985 | apply_mask(p); | |
2986 | if (src_p) | |
2987 | apply_mask_ipv6(src_p); | |
718e3744 | 2988 | |
d62a17ae | 2989 | /* Set default distance by route type. */ |
eea2ef07 | 2990 | if (re->distance == 0) |
0492eea0 | 2991 | re->distance = route_distance(re->type); |
718e3744 | 2992 | |
d62a17ae | 2993 | /* Lookup route node.*/ |
2994 | rn = srcdest_rnode_get(table, p, src_p); | |
718e3744 | 2995 | |
40ecd8e4 DS |
2996 | /* |
2997 | * If same type of route are installed, treat it as a implicit | |
9db35a5e | 2998 | * withdraw. If the user has specified the No route replace semantics |
40ecd8e4 DS |
2999 | * for the install don't do a route replace. |
3000 | */ | |
a2addae8 | 3001 | RNODE_FOREACH_RE (rn, same) { |
d62a17ae | 3002 | if (CHECK_FLAG(same->status, ROUTE_ENTRY_REMOVED)) |
3003 | continue; | |
41ec9222 | 3004 | |
9db35a5e MS |
3005 | /* Compare various route_entry properties */ |
3006 | if (rib_compare_routes(re, same)) | |
d62a17ae | 3007 | break; |
3008 | } | |
718e3744 | 3009 | |
cf363e1b MS |
3010 | /* If this route is kernel/connected route, notify the dataplane. */ |
3011 | if (RIB_SYSTEM_ROUTE(re)) { | |
3012 | /* Notify dataplane */ | |
3013 | dplane_sys_route_add(rn, re); | |
3014 | } | |
3015 | ||
d62a17ae | 3016 | /* Link new re to node.*/ |
3017 | if (IS_ZEBRA_DEBUG_RIB) { | |
2da33d6b DS |
3018 | rnode_debug(rn, re->vrf_id, |
3019 | "Inserting route rn %p, re %p (%s) existing %p", | |
3020 | rn, re, zebra_route_string(re->type), same); | |
718e3744 | 3021 | |
d62a17ae | 3022 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
3023 | route_entry_dump(p, src_p, re); | |
718e3744 | 3024 | } |
6883bf8d DS |
3025 | |
3026 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
d62a17ae | 3027 | rib_addnode(rn, re, 1); |
3028 | ret = 1; | |
6b0655a2 | 3029 | |
d62a17ae | 3030 | /* Free implicit route.*/ |
1d48702e | 3031 | if (same) |
d62a17ae | 3032 | rib_delnode(rn, same); |
718e3744 | 3033 | |
d62a17ae | 3034 | route_unlock_node(rn); |
3035 | return ret; | |
3036 | } | |
3037 | ||
1d48702e MS |
3038 | /* |
3039 | * Add a single route. | |
3040 | */ | |
3041 | int rib_add_multipath(afi_t afi, safi_t safi, struct prefix *p, | |
3042 | struct prefix_ipv6 *src_p, struct route_entry *re, | |
3043 | struct nexthop_group *ng) | |
3044 | { | |
3045 | int ret; | |
377e29f7 | 3046 | struct nhg_hash_entry nhe; |
1d48702e MS |
3047 | |
3048 | if (!re) | |
3049 | return -1; | |
3050 | ||
3051 | /* We either need nexthop(s) or an existing nexthop id */ | |
3052 | if (ng == NULL && re->nhe_id == 0) | |
3053 | return -1; | |
3054 | ||
3055 | /* | |
3056 | * Use a temporary nhe to convey info to the common/main api. | |
3057 | */ | |
377e29f7 | 3058 | zebra_nhe_init(&nhe, afi, (ng ? ng->nexthop : NULL)); |
1d48702e MS |
3059 | if (ng) |
3060 | nhe.nhg.nexthop = ng->nexthop; | |
3061 | else if (re->nhe_id > 0) | |
3062 | nhe.id = re->nhe_id; | |
3063 | ||
3064 | ret = rib_add_multipath_nhe(afi, safi, p, src_p, re, &nhe); | |
3065 | ||
3066 | /* In this path, the callers expect memory to be freed. */ | |
3067 | nexthop_group_delete(&ng); | |
3068 | ||
3069 | /* In error cases, free the route also */ | |
3070 | if (ret < 0) | |
3071 | XFREE(MTYPE_RE, re); | |
3072 | ||
3073 | return ret; | |
3074 | } | |
3075 | ||
d62a17ae | 3076 | void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
d7c0a89a | 3077 | unsigned short instance, int flags, struct prefix *p, |
fd36be7e | 3078 | struct prefix_ipv6 *src_p, const struct nexthop *nh, |
bc541126 | 3079 | uint32_t nhe_id, uint32_t table_id, uint32_t metric, |
0aaa7228 | 3080 | uint8_t distance, bool fromkernel, bool connected_down) |
d62a17ae | 3081 | { |
3082 | struct route_table *table; | |
3083 | struct route_node *rn; | |
3084 | struct route_entry *re; | |
3085 | struct route_entry *fib = NULL; | |
3086 | struct route_entry *same = NULL; | |
fd36be7e | 3087 | struct nexthop *rtnh; |
d62a17ae | 3088 | char buf2[INET6_ADDRSTRLEN]; |
5f7a4718 | 3089 | rib_dest_t *dest; |
d62a17ae | 3090 | |
1f610a1f | 3091 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
d62a17ae | 3092 | |
3093 | /* Lookup table. */ | |
c7c0b007 SW |
3094 | table = zebra_vrf_lookup_table_with_table_id(afi, safi, vrf_id, |
3095 | table_id); | |
d62a17ae | 3096 | if (!table) |
3097 | return; | |
3098 | ||
3099 | /* Apply mask. */ | |
3100 | apply_mask(p); | |
3101 | if (src_p) | |
3102 | apply_mask_ipv6(src_p); | |
3103 | ||
3104 | /* Lookup route node. */ | |
3105 | rn = srcdest_rnode_lookup(table, p, src_p); | |
3106 | if (!rn) { | |
2dbe669b | 3107 | char src_buf[PREFIX_STRLEN]; |
d62a17ae | 3108 | |
d62a17ae | 3109 | if (src_p && src_p->prefixlen) |
3110 | prefix2str(src_p, src_buf, sizeof(src_buf)); | |
3111 | else | |
3112 | src_buf[0] = '\0'; | |
3113 | ||
82d7d0e2 DS |
3114 | if (IS_ZEBRA_DEBUG_RIB) { |
3115 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); | |
3116 | ||
2dbe669b DA |
3117 | zlog_debug("%s[%d]:%pFX%s%s doesn't exist in rib", |
3118 | vrf->name, table_id, p, | |
d62a17ae | 3119 | (src_buf[0] != '\0') ? " from " : "", |
3120 | src_buf); | |
82d7d0e2 | 3121 | } |
d62a17ae | 3122 | return; |
3123 | } | |
718e3744 | 3124 | |
5f7a4718 DS |
3125 | dest = rib_dest_from_rnode(rn); |
3126 | fib = dest->selected_fib; | |
3127 | ||
d62a17ae | 3128 | /* Lookup same type route. */ |
a2addae8 | 3129 | RNODE_FOREACH_RE (rn, re) { |
d62a17ae | 3130 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
3131 | continue; | |
3132 | ||
d62a17ae | 3133 | if (re->type != type) |
3134 | continue; | |
3135 | if (re->instance != instance) | |
3136 | continue; | |
40ecd8e4 DS |
3137 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_RR_USE_DISTANCE) && |
3138 | distance != re->distance) | |
3139 | continue; | |
3140 | ||
996c9314 | 3141 | if (re->type == ZEBRA_ROUTE_KERNEL && re->metric != metric) |
f19435a8 | 3142 | continue; |
0eb97b86 | 3143 | if (re->type == ZEBRA_ROUTE_CONNECT && |
c415d895 | 3144 | (rtnh = re->nhe->nhg.nexthop) |
fd36be7e DL |
3145 | && rtnh->type == NEXTHOP_TYPE_IFINDEX && nh) { |
3146 | if (rtnh->ifindex != nh->ifindex) | |
d62a17ae | 3147 | continue; |
d62a17ae | 3148 | same = re; |
3149 | break; | |
3150 | } | |
fec211ad | 3151 | |
d62a17ae | 3152 | /* Make sure that the route found has the same gateway. */ |
fec211ad | 3153 | if (nhe_id && re->nhe_id == nhe_id) { |
bc541126 SW |
3154 | same = re; |
3155 | break; | |
fec211ad SW |
3156 | } |
3157 | ||
3158 | if (nh == NULL) { | |
3159 | same = re; | |
3160 | break; | |
3161 | } | |
c415d895 | 3162 | for (ALL_NEXTHOPS(re->nhe->nhg, rtnh)) { |
fec211ad SW |
3163 | /* |
3164 | * No guarantee all kernel send nh with labels | |
3165 | * on delete. | |
3166 | */ | |
3167 | if (nexthop_same_no_labels(rtnh, nh)) { | |
d62a17ae | 3168 | same = re; |
3169 | break; | |
3170 | } | |
d62a17ae | 3171 | } |
fec211ad SW |
3172 | |
3173 | if (same) | |
3174 | break; | |
d62a17ae | 3175 | } |
3176 | /* If same type of route can't be found and this message is from | |
3177 | kernel. */ | |
3178 | if (!same) { | |
5dfeba19 DS |
3179 | /* |
3180 | * In the past(HA!) we could get here because | |
3181 | * we were receiving a route delete from the | |
3182 | * kernel and we're not marking the proto | |
3183 | * as coming from it's appropriate originator. | |
3184 | * Now that we are properly noticing the fact | |
3185 | * that the kernel has deleted our route we | |
3186 | * are not going to get called in this path | |
3187 | * I am going to leave this here because | |
3188 | * this might still work this way on non-linux | |
3189 | * platforms as well as some weird state I have | |
3190 | * not properly thought of yet. | |
3191 | * If we can show that this code path is | |
3192 | * dead then we can remove it. | |
3193 | */ | |
b8faa875 | 3194 | if (fib && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) { |
d62a17ae | 3195 | if (IS_ZEBRA_DEBUG_RIB) { |
2da33d6b DS |
3196 | rnode_debug(rn, vrf_id, |
3197 | "rn %p, re %p (%s) was deleted from kernel, adding", | |
3198 | rn, fib, | |
3199 | zebra_route_string(fib->type)); | |
d62a17ae | 3200 | } |
9271987f DS |
3201 | if (allow_delete |
3202 | || CHECK_FLAG(dest->flags, RIB_ROUTE_ANY_QUEUED)) { | |
677c1dd5 | 3203 | UNSET_FLAG(fib->status, ROUTE_ENTRY_INSTALLED); |
d62a17ae | 3204 | /* Unset flags. */ |
c415d895 | 3205 | for (rtnh = fib->nhe->nhg.nexthop; rtnh; |
fd36be7e DL |
3206 | rtnh = rtnh->next) |
3207 | UNSET_FLAG(rtnh->flags, | |
d62a17ae | 3208 | NEXTHOP_FLAG_FIB); |
3209 | ||
ed216282 DS |
3210 | /* |
3211 | * This is a non FRR route | |
3212 | * as such we should mark | |
3213 | * it as deleted | |
3214 | */ | |
5f7a4718 | 3215 | dest->selected_fib = NULL; |
d62a17ae | 3216 | } else { |
3217 | /* This means someone else, other than Zebra, | |
3218 | * has deleted | |
3219 | * a Zebra router from the kernel. We will add | |
3220 | * it back */ | |
3221 | rib_install_kernel(rn, fib, NULL); | |
3222 | } | |
3223 | } else { | |
3224 | if (IS_ZEBRA_DEBUG_RIB) { | |
fd36be7e | 3225 | if (nh) |
d62a17ae | 3226 | rnode_debug( |
3227 | rn, vrf_id, | |
3efd0893 | 3228 | "via %s ifindex %d type %d doesn't exist in rib", |
36228974 | 3229 | inet_ntop(afi2family(afi), |
3230 | &nh->gate, buf2, | |
3231 | sizeof(buf2)), | |
3232 | nh->ifindex, type); | |
d62a17ae | 3233 | else |
3234 | rnode_debug( | |
3235 | rn, vrf_id, | |
fd36be7e DL |
3236 | "type %d doesn't exist in rib", |
3237 | type); | |
d62a17ae | 3238 | } |
3239 | route_unlock_node(rn); | |
3240 | return; | |
3241 | } | |
3242 | } | |
718e3744 | 3243 | |
5dfeba19 | 3244 | if (same) { |
996c9314 LB |
3245 | if (fromkernel && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE) |
3246 | && !allow_delete) { | |
5dfeba19 DS |
3247 | rib_install_kernel(rn, same, NULL); |
3248 | route_unlock_node(rn); | |
3249 | ||
3250 | return; | |
3251 | } | |
6134fd82 | 3252 | |
2b83602b | 3253 | /* Special handling for IPv4 or IPv6 routes sourced from |
3254 | * EVPN - the nexthop (and associated MAC) need to be | |
3255 | * uninstalled if no more refs. | |
3256 | */ | |
90264d64 | 3257 | if (CHECK_FLAG(flags, ZEBRA_FLAG_EVPN_ROUTE)) { |
6134fd82 | 3258 | struct nexthop *tmp_nh; |
3259 | ||
c415d895 | 3260 | for (ALL_NEXTHOPS(re->nhe->nhg, tmp_nh)) { |
6134fd82 | 3261 | struct ipaddr vtep_ip; |
3262 | ||
3263 | memset(&vtep_ip, 0, sizeof(struct ipaddr)); | |
1ec31309 | 3264 | if (afi == AFI_IP) { |
3265 | vtep_ip.ipa_type = IPADDR_V4; | |
3266 | memcpy(&(vtep_ip.ipaddr_v4), | |
3267 | &(tmp_nh->gate.ipv4), | |
3268 | sizeof(struct in_addr)); | |
3269 | } else { | |
3270 | vtep_ip.ipa_type = IPADDR_V6; | |
3271 | memcpy(&(vtep_ip.ipaddr_v6), | |
3272 | &(tmp_nh->gate.ipv6), | |
3273 | sizeof(struct in6_addr)); | |
3274 | } | |
a317a9b9 | 3275 | zebra_vxlan_evpn_vrf_route_del(re->vrf_id, |
6134fd82 | 3276 | &vtep_ip, p); |
3277 | } | |
3278 | } | |
cf363e1b MS |
3279 | |
3280 | /* Notify dplane if system route changes */ | |
3281 | if (RIB_SYSTEM_ROUTE(re)) | |
3282 | dplane_sys_route_del(rn, same); | |
3283 | ||
d62a17ae | 3284 | rib_delnode(rn, same); |
5dfeba19 | 3285 | } |
05737783 | 3286 | |
0aaa7228 DS |
3287 | /* |
3288 | * This is to force an immediate re-eval of this particular | |
3289 | * node via nexthop tracking. Why? Because there are scenarios | |
3290 | * where the interface is flapping and the normal queuing methodology | |
3291 | * will cause down/up events to very very rarely be combined into | |
3292 | * a non-event from nexthop tracking perspective. Leading | |
3293 | * to some fun timing situations with upper level routing protocol | |
3294 | * trying to and failing to install routes during this blip. Especially | |
3295 | * when zebra is under load. | |
3296 | */ | |
3297 | if (connected_down) | |
3298 | zebra_rib_evaluate_rn_nexthops(rn, | |
3299 | zebra_router_get_next_sequence()); | |
d62a17ae | 3300 | route_unlock_node(rn); |
3301 | return; | |
3302 | } | |
718e3744 | 3303 | |
718e3744 | 3304 | |
d7c0a89a QY |
3305 | int rib_add(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
3306 | unsigned short instance, int flags, struct prefix *p, | |
3307 | struct prefix_ipv6 *src_p, const struct nexthop *nh, | |
8032b717 SW |
3308 | uint32_t nhe_id, uint32_t table_id, uint32_t metric, uint32_t mtu, |
3309 | uint8_t distance, route_tag_t tag) | |
d62a17ae | 3310 | { |
bbb322f2 SW |
3311 | struct route_entry *re = NULL; |
3312 | struct nexthop *nexthop = NULL; | |
0eb97b86 | 3313 | struct nexthop_group *ng = NULL; |
718e3744 | 3314 | |
66af6845 | 3315 | /* Allocate new route_entry structure. */ |
d62a17ae | 3316 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); |
d62a17ae | 3317 | re->type = type; |
3318 | re->instance = instance; | |
3319 | re->distance = distance; | |
3320 | re->flags = flags; | |
3321 | re->metric = metric; | |
3322 | re->mtu = mtu; | |
3323 | re->table = table_id; | |
3324 | re->vrf_id = vrf_id; | |
98572489 | 3325 | re->uptime = monotime(NULL); |
4e40b6d6 | 3326 | re->tag = tag; |
bbb322f2 SW |
3327 | re->nhe_id = nhe_id; |
3328 | ||
0eb97b86 MS |
3329 | /* If the owner of the route supplies a shared nexthop-group id, |
3330 | * we'll use that. Otherwise, pass the nexthop along directly. | |
3331 | */ | |
e22e8001 | 3332 | if (!nhe_id) { |
0eb97b86 | 3333 | ng = nexthop_group_new(); |
d62a17ae | 3334 | |
e22e8001 SW |
3335 | /* Add nexthop. */ |
3336 | nexthop = nexthop_new(); | |
3337 | *nexthop = *nh; | |
0eb97b86 | 3338 | nexthop_group_add_sorted(ng, nexthop); |
e22e8001 | 3339 | } |
718e3744 | 3340 | |
0eb97b86 | 3341 | return rib_add_multipath(afi, safi, p, src_p, re, ng); |
718e3744 | 3342 | } |
3343 | ||
91e6f25b | 3344 | static const char *rib_update_event2str(enum rib_update_event event) |
2a99ab95 SW |
3345 | { |
3346 | const char *ret = "UNKNOWN"; | |
3347 | ||
3348 | switch (event) { | |
3349 | case RIB_UPDATE_KERNEL: | |
3350 | ret = "RIB_UPDATE_KERNEL"; | |
3351 | break; | |
3352 | case RIB_UPDATE_RMAP_CHANGE: | |
3353 | ret = "RIB_UPDATE_RMAP_CHANGE"; | |
3354 | break; | |
3355 | case RIB_UPDATE_OTHER: | |
3356 | ret = "RIB_UPDATE_OTHER"; | |
3357 | break; | |
3358 | case RIB_UPDATE_MAX: | |
3359 | break; | |
3360 | } | |
3361 | ||
3362 | return ret; | |
3363 | } | |
3364 | ||
3365 | ||
3366 | /* Schedule route nodes to be processed if they match the type */ | |
3367 | static void rib_update_route_node(struct route_node *rn, int type) | |
3368 | { | |
3369 | struct route_entry *re, *next; | |
3370 | bool re_changed = false; | |
3371 | ||
3372 | RNODE_FOREACH_RE_SAFE (rn, re, next) { | |
3373 | if (type == ZEBRA_ROUTE_ALL || type == re->type) { | |
3374 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
3375 | re_changed = true; | |
3376 | } | |
3377 | } | |
3378 | ||
3379 | if (re_changed) | |
3380 | rib_queue_add(rn); | |
3381 | } | |
3382 | ||
1c848137 | 3383 | /* Schedule routes of a particular table (address-family) based on event. */ |
91e6f25b | 3384 | void rib_update_table(struct route_table *table, enum rib_update_event event) |
d62a17ae | 3385 | { |
3386 | struct route_node *rn; | |
2a99ab95 SW |
3387 | |
3388 | if (IS_ZEBRA_DEBUG_EVENT) { | |
3389 | struct zebra_vrf *zvrf; | |
3390 | struct vrf *vrf; | |
3391 | ||
630d5962 DS |
3392 | zvrf = table->info |
3393 | ? ((struct rib_table_info *)table->info)->zvrf | |
3394 | : NULL; | |
2a99ab95 SW |
3395 | vrf = zvrf ? zvrf->vrf : NULL; |
3396 | ||
3397 | zlog_debug("%s: %s VRF %s Table %u event %s", __func__, | |
3398 | table->info ? afi2str( | |
630d5962 | 3399 | ((struct rib_table_info *)table->info)->afi) |
2a99ab95 | 3400 | : "Unknown", |
bd47f3a3 | 3401 | VRF_LOGNAME(vrf), zvrf ? zvrf->table_id : 0, |
2a99ab95 SW |
3402 | rib_update_event2str(event)); |
3403 | } | |
d62a17ae | 3404 | |
3405 | /* Walk all routes and queue for processing, if appropriate for | |
3406 | * the trigger event. | |
3407 | */ | |
3408 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { | |
1ca60f2c DS |
3409 | /* |
3410 | * If we are looking at a route node and the node | |
3411 | * has already been queued we don't | |
3412 | * need to queue it up again | |
3413 | */ | |
2a99ab95 SW |
3414 | if (rn->info |
3415 | && CHECK_FLAG(rib_dest_from_rnode(rn)->flags, | |
3416 | RIB_ROUTE_ANY_QUEUED)) | |
1ca60f2c | 3417 | continue; |
2a99ab95 | 3418 | |
d62a17ae | 3419 | switch (event) { |
2a99ab95 SW |
3420 | case RIB_UPDATE_KERNEL: |
3421 | rib_update_route_node(rn, ZEBRA_ROUTE_KERNEL); | |
3422 | break; | |
d62a17ae | 3423 | case RIB_UPDATE_RMAP_CHANGE: |
3424 | case RIB_UPDATE_OTHER: | |
2a99ab95 | 3425 | rib_update_route_node(rn, ZEBRA_ROUTE_ALL); |
d62a17ae | 3426 | break; |
d62a17ae | 3427 | default: |
3428 | break; | |
3429 | } | |
3430 | } | |
b84c7253 | 3431 | } |
3432 | ||
91e6f25b | 3433 | static void rib_update_handle_vrf(vrf_id_t vrf_id, enum rib_update_event event) |
718e3744 | 3434 | { |
d62a17ae | 3435 | struct route_table *table; |
1c848137 | 3436 | |
2a99ab95 SW |
3437 | if (IS_ZEBRA_DEBUG_EVENT) |
3438 | zlog_debug("%s: Handling VRF %s event %s", __func__, | |
3439 | vrf_id_to_name(vrf_id), rib_update_event2str(event)); | |
3440 | ||
d62a17ae | 3441 | /* Process routes of interested address-families. */ |
3442 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
2a99ab95 | 3443 | if (table) |
d62a17ae | 3444 | rib_update_table(table, event); |
718e3744 | 3445 | |
d62a17ae | 3446 | table = zebra_vrf_table(AFI_IP6, SAFI_UNICAST, vrf_id); |
2a99ab95 | 3447 | if (table) |
d62a17ae | 3448 | rib_update_table(table, event); |
2a99ab95 SW |
3449 | } |
3450 | ||
91e6f25b | 3451 | static void rib_update_handle_vrf_all(enum rib_update_event event) |
2a99ab95 SW |
3452 | { |
3453 | struct zebra_router_table *zrt; | |
3454 | ||
3455 | if (IS_ZEBRA_DEBUG_EVENT) | |
3456 | zlog_debug("%s: Handling VRF (ALL) event %s", __func__, | |
3457 | rib_update_event2str(event)); | |
3458 | ||
3459 | /* Just iterate over all the route tables, rather than vrf lookups */ | |
3460 | RB_FOREACH (zrt, zebra_router_table_head, &zrouter.tables) | |
3461 | rib_update_table(zrt->table, event); | |
3462 | } | |
3463 | ||
3464 | struct rib_update_ctx { | |
91e6f25b | 3465 | enum rib_update_event event; |
2a99ab95 SW |
3466 | bool vrf_all; |
3467 | vrf_id_t vrf_id; | |
3468 | }; | |
3469 | ||
3470 | static struct rib_update_ctx *rib_update_ctx_init(vrf_id_t vrf_id, | |
91e6f25b | 3471 | enum rib_update_event event) |
2a99ab95 SW |
3472 | { |
3473 | struct rib_update_ctx *ctx; | |
3474 | ||
3475 | ctx = XCALLOC(MTYPE_RIB_UPDATE_CTX, sizeof(struct rib_update_ctx)); | |
3476 | ||
3477 | ctx->event = event; | |
3478 | ctx->vrf_id = vrf_id; | |
3479 | ||
3480 | return ctx; | |
3481 | } | |
3482 | ||
3483 | static void rib_update_ctx_fini(struct rib_update_ctx **ctx) | |
3484 | { | |
3485 | XFREE(MTYPE_RIB_UPDATE_CTX, *ctx); | |
2a99ab95 SW |
3486 | } |
3487 | ||
3488 | static int rib_update_handler(struct thread *thread) | |
3489 | { | |
3490 | struct rib_update_ctx *ctx; | |
3491 | ||
3492 | ctx = THREAD_ARG(thread); | |
3493 | ||
3494 | if (ctx->vrf_all) | |
3495 | rib_update_handle_vrf_all(ctx->event); | |
3496 | else | |
3497 | rib_update_handle_vrf(ctx->vrf_id, ctx->event); | |
3498 | ||
3499 | rib_update_ctx_fini(&ctx); | |
3500 | ||
3501 | return 0; | |
3502 | } | |
3503 | ||
3504 | /* | |
3505 | * Thread list to ensure we don't schedule a ton of events | |
3506 | * if interfaces are flapping for instance. | |
3507 | */ | |
3508 | static struct thread *t_rib_update_threads[RIB_UPDATE_MAX]; | |
3509 | ||
3510 | /* Schedule a RIB update event for specific vrf */ | |
91e6f25b | 3511 | void rib_update_vrf(vrf_id_t vrf_id, enum rib_update_event event) |
2a99ab95 SW |
3512 | { |
3513 | struct rib_update_ctx *ctx; | |
3514 | ||
3515 | ctx = rib_update_ctx_init(vrf_id, event); | |
3516 | ||
3517 | /* Don't worry about making sure multiple rib updates for specific vrf | |
3518 | * are scheduled at once for now. If it becomes a problem, we can use a | |
3519 | * lookup of some sort to keep track of running threads via t_vrf_id | |
3520 | * like how we are doing it in t_rib_update_threads[]. | |
3521 | */ | |
3522 | thread_add_event(zrouter.master, rib_update_handler, ctx, 0, NULL); | |
3523 | ||
3524 | if (IS_ZEBRA_DEBUG_EVENT) | |
3525 | zlog_debug("%s: Scheduled VRF %s, event %s", __func__, | |
3526 | vrf_id_to_name(ctx->vrf_id), | |
3527 | rib_update_event2str(event)); | |
3528 | } | |
3529 | ||
3530 | /* Schedule a RIB update event for all vrfs */ | |
91e6f25b | 3531 | void rib_update(enum rib_update_event event) |
2a99ab95 SW |
3532 | { |
3533 | struct rib_update_ctx *ctx; | |
3534 | ||
3535 | ctx = rib_update_ctx_init(0, event); | |
3536 | ||
3537 | ctx->vrf_all = true; | |
3538 | ||
3539 | if (!thread_add_event(zrouter.master, rib_update_handler, ctx, 0, | |
3540 | &t_rib_update_threads[event])) | |
3541 | rib_update_ctx_fini(&ctx); /* Already scheduled */ | |
3542 | else if (IS_ZEBRA_DEBUG_EVENT) | |
05267678 | 3543 | zlog_debug("%s: Scheduled VRF (ALL), event %s", __func__, |
2a99ab95 | 3544 | rib_update_event2str(event)); |
718e3744 | 3545 | } |
3546 | ||
718e3744 | 3547 | /* Delete self installed routes after zebra is relaunched. */ |
95a29032 | 3548 | void rib_sweep_table(struct route_table *table) |
d62a17ae | 3549 | { |
3550 | struct route_node *rn; | |
3551 | struct route_entry *re; | |
3552 | struct route_entry *next; | |
915902cb | 3553 | struct nexthop *nexthop; |
d62a17ae | 3554 | |
915902cb DS |
3555 | if (!table) |
3556 | return; | |
d62a17ae | 3557 | |
6d81b590 MS |
3558 | if (IS_ZEBRA_DEBUG_RIB) |
3559 | zlog_debug("%s: starting", __func__); | |
3560 | ||
915902cb | 3561 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
a2addae8 | 3562 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d4644d41 | 3563 | |
915902cb DS |
3564 | if (IS_ZEBRA_DEBUG_RIB) |
3565 | route_entry_dump(&rn->p, NULL, re); | |
3566 | ||
3567 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
3568 | continue; | |
3569 | ||
3570 | if (!CHECK_FLAG(re->flags, ZEBRA_FLAG_SELFROUTE)) | |
3571 | continue; | |
3572 | ||
d4644d41 DS |
3573 | /* |
3574 | * If routes are older than startup_time then | |
3575 | * we know we read them in from the kernel. | |
3576 | * As such we can safely remove them. | |
3577 | */ | |
3578 | if (zrouter.startup_time < re->uptime) | |
3579 | continue; | |
3580 | ||
915902cb DS |
3581 | /* |
3582 | * So we are starting up and have received | |
3583 | * routes from the kernel that we have installed | |
3584 | * from a previous run of zebra but not cleaned | |
3585 | * up ( say a kill -9 ) | |
3586 | * But since we haven't actually installed | |
3587 | * them yet( we received them from the kernel ) | |
3588 | * we don't think they are active. | |
3589 | * So let's pretend they are active to actually | |
3590 | * remove them. | |
3591 | * In all honesty I'm not sure if we should | |
3592 | * mark them as active when we receive them | |
3593 | * This is startup only so probably ok. | |
3594 | * | |
3595 | * If we ever decide to move rib_sweep_table | |
3596 | * to a different spot (ie startup ) | |
3597 | * this decision needs to be revisited | |
3598 | */ | |
677c1dd5 | 3599 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
c415d895 | 3600 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
915902cb DS |
3601 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
3602 | ||
0c555cc6 DS |
3603 | rib_uninstall_kernel(rn, re); |
3604 | rib_delnode(rn, re); | |
915902cb DS |
3605 | } |
3606 | } | |
6d81b590 MS |
3607 | |
3608 | if (IS_ZEBRA_DEBUG_RIB) | |
3609 | zlog_debug("%s: ends", __func__); | |
718e3744 | 3610 | } |
3611 | ||
3612 | /* Sweep all RIB tables. */ | |
d4644d41 | 3613 | int rib_sweep_route(struct thread *t) |
718e3744 | 3614 | { |
d62a17ae | 3615 | struct vrf *vrf; |
3616 | struct zebra_vrf *zvrf; | |
78104b9b | 3617 | |
a2addae8 | 3618 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
915902cb DS |
3619 | if ((zvrf = vrf->info) == NULL) |
3620 | continue; | |
3621 | ||
d62a17ae | 3622 | rib_sweep_table(zvrf->table[AFI_IP][SAFI_UNICAST]); |
3623 | rib_sweep_table(zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3624 | } | |
95a29032 | 3625 | |
89272910 | 3626 | zebra_router_sweep_route(); |
38e40db1 | 3627 | zebra_router_sweep_nhgs(); |
d4644d41 DS |
3628 | |
3629 | return 0; | |
718e3744 | 3630 | } |
2ea1ab1c VT |
3631 | |
3632 | /* Remove specific by protocol routes from 'table'. */ | |
d7c0a89a | 3633 | unsigned long rib_score_proto_table(uint8_t proto, unsigned short instance, |
47a08aa9 | 3634 | struct route_table *table) |
d62a17ae | 3635 | { |
3636 | struct route_node *rn; | |
3637 | struct route_entry *re; | |
3638 | struct route_entry *next; | |
3639 | unsigned long n = 0; | |
3640 | ||
3641 | if (table) | |
3642 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) | |
a2addae8 | 3643 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 3644 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
3645 | continue; | |
3646 | if (re->type == proto | |
3647 | && re->instance == instance) { | |
3648 | rib_delnode(rn, re); | |
3649 | n++; | |
3650 | } | |
3651 | } | |
3652 | return n; | |
2ea1ab1c VT |
3653 | } |
3654 | ||
3655 | /* Remove specific by protocol routes. */ | |
d7c0a89a | 3656 | unsigned long rib_score_proto(uint8_t proto, unsigned short instance) |
2ea1ab1c | 3657 | { |
d62a17ae | 3658 | struct vrf *vrf; |
3659 | struct zebra_vrf *zvrf; | |
d8612e65 | 3660 | struct other_route_table *ort; |
d62a17ae | 3661 | unsigned long cnt = 0; |
78104b9b | 3662 | |
d8612e65 DS |
3663 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
3664 | zvrf = vrf->info; | |
3665 | if (!zvrf) | |
3666 | continue; | |
78104b9b | 3667 | |
d8612e65 DS |
3668 | cnt += rib_score_proto_table(proto, instance, |
3669 | zvrf->table[AFI_IP][SAFI_UNICAST]) | |
3670 | + rib_score_proto_table( | |
3671 | proto, instance, | |
3672 | zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3673 | ||
81fddbe7 | 3674 | frr_each(otable, &zvrf->other_tables, ort) cnt += |
d8612e65 DS |
3675 | rib_score_proto_table(proto, instance, ort->table); |
3676 | } | |
47a08aa9 | 3677 | |
d62a17ae | 3678 | return cnt; |
2ea1ab1c VT |
3679 | } |
3680 | ||
718e3744 | 3681 | /* Close RIB and clean up kernel routes. */ |
d62a17ae | 3682 | void rib_close_table(struct route_table *table) |
718e3744 | 3683 | { |
d62a17ae | 3684 | struct route_node *rn; |
630d5962 | 3685 | struct rib_table_info *info; |
5f7a4718 | 3686 | rib_dest_t *dest; |
718e3744 | 3687 | |
1e9f448f DS |
3688 | if (!table) |
3689 | return; | |
9fd92e3c | 3690 | |
6ca30e9e | 3691 | info = route_table_get_info(table); |
5adc2528 | 3692 | |
5f7a4718 DS |
3693 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
3694 | dest = rib_dest_from_rnode(rn); | |
1e9f448f | 3695 | |
5f7a4718 | 3696 | if (dest && dest->selected_fib) { |
1e9f448f DS |
3697 | if (info->safi == SAFI_UNICAST) |
3698 | hook_call(rib_update, rn, NULL); | |
3699 | ||
3cdba47a DS |
3700 | rib_uninstall_kernel(rn, dest->selected_fib); |
3701 | dest->selected_fib = NULL; | |
1e9f448f | 3702 | } |
5f7a4718 | 3703 | } |
718e3744 | 3704 | } |
3705 | ||
9bd9717b MS |
3706 | /* |
3707 | * Handler for async dataplane results after a pseudowire installation | |
3708 | */ | |
3709 | static int handle_pw_result(struct zebra_dplane_ctx *ctx) | |
3710 | { | |
9bd9717b MS |
3711 | struct zebra_pw *pw; |
3712 | struct zebra_vrf *vrf; | |
3713 | ||
3714 | /* The pseudowire code assumes success - we act on an error | |
3715 | * result for installation attempts here. | |
3716 | */ | |
3717 | if (dplane_ctx_get_op(ctx) != DPLANE_OP_PW_INSTALL) | |
3718 | goto done; | |
3719 | ||
3720 | if (dplane_ctx_get_status(ctx) != ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
3721 | vrf = zebra_vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); | |
7c7ef4a8 | 3722 | pw = zebra_pw_find(vrf, dplane_ctx_get_ifname(ctx)); |
9bd9717b | 3723 | if (pw) |
fd563cc7 KS |
3724 | zebra_pw_install_failure(pw, |
3725 | dplane_ctx_get_pw_status(ctx)); | |
9bd9717b MS |
3726 | } |
3727 | ||
3728 | done: | |
3729 | ||
9f2d0354 | 3730 | return 0; |
9bd9717b MS |
3731 | } |
3732 | ||
3733 | ||
7cdb1a84 | 3734 | /* |
d37f4d6c MS |
3735 | * Handle results from the dataplane system. Dequeue update context |
3736 | * structs, dispatch to appropriate internal handlers. | |
7cdb1a84 MS |
3737 | */ |
3738 | static int rib_process_dplane_results(struct thread *thread) | |
3739 | { | |
25779064 | 3740 | struct zebra_dplane_ctx *ctx; |
4c206c8f | 3741 | struct dplane_ctx_q ctxlist; |
2fc69f03 | 3742 | bool shut_p = false; |
4c206c8f MS |
3743 | |
3744 | /* Dequeue a list of completed updates with one lock/unlock cycle */ | |
7cdb1a84 MS |
3745 | |
3746 | do { | |
4c206c8f MS |
3747 | TAILQ_INIT(&ctxlist); |
3748 | ||
7cdb1a84 | 3749 | /* Take lock controlling queue of results */ |
00dffa8c | 3750 | frr_with_mutex(&dplane_mutex) { |
d37f4d6c | 3751 | /* Dequeue list of context structs */ |
4c206c8f | 3752 | dplane_ctx_list_append(&ctxlist, &rib_dplane_q); |
7cdb1a84 | 3753 | } |
7cdb1a84 | 3754 | |
4c206c8f MS |
3755 | /* Dequeue context block */ |
3756 | ctx = dplane_ctx_dequeue(&ctxlist); | |
3757 | ||
3758 | /* If we've emptied the results queue, we're done */ | |
3759 | if (ctx == NULL) | |
7cdb1a84 | 3760 | break; |
7cdb1a84 | 3761 | |
2fc69f03 MS |
3762 | /* If zebra is shutting down, avoid processing results, |
3763 | * just drain the results queue. | |
3764 | */ | |
3765 | shut_p = atomic_load_explicit(&zrouter.in_shutdown, | |
3766 | memory_order_relaxed); | |
3767 | if (shut_p) { | |
3768 | while (ctx) { | |
3769 | dplane_ctx_fini(&ctx); | |
3770 | ||
3771 | ctx = dplane_ctx_dequeue(&ctxlist); | |
3772 | } | |
3773 | ||
3774 | continue; | |
3775 | } | |
3776 | ||
4c206c8f | 3777 | while (ctx) { |
d37f4d6c MS |
3778 | switch (dplane_ctx_get_op(ctx)) { |
3779 | case DPLANE_OP_ROUTE_INSTALL: | |
3780 | case DPLANE_OP_ROUTE_UPDATE: | |
3781 | case DPLANE_OP_ROUTE_DELETE: | |
188a00e0 MS |
3782 | { |
3783 | /* Bit of special case for route updates | |
3784 | * that were generated by async notifications: | |
3785 | * we don't want to continue processing these | |
3786 | * in the rib. | |
3787 | */ | |
3788 | if (dplane_ctx_get_notif_provider(ctx) == 0) | |
3789 | rib_process_result(ctx); | |
3790 | else | |
3791 | dplane_ctx_fini(&ctx); | |
3792 | } | |
3793 | break; | |
d37f4d6c | 3794 | |
54818e3b MS |
3795 | case DPLANE_OP_ROUTE_NOTIFY: |
3796 | rib_process_dplane_notify(ctx); | |
d37f4d6c MS |
3797 | break; |
3798 | ||
9865e1c3 SW |
3799 | case DPLANE_OP_NH_INSTALL: |
3800 | case DPLANE_OP_NH_UPDATE: | |
3801 | case DPLANE_OP_NH_DELETE: | |
3802 | zebra_nhg_dplane_result(ctx); | |
3803 | break; | |
3804 | ||
d37f4d6c MS |
3805 | case DPLANE_OP_LSP_INSTALL: |
3806 | case DPLANE_OP_LSP_UPDATE: | |
3807 | case DPLANE_OP_LSP_DELETE: | |
188a00e0 MS |
3808 | { |
3809 | /* Bit of special case for LSP updates | |
3810 | * that were generated by async notifications: | |
3811 | * we don't want to continue processing these. | |
3812 | */ | |
3813 | if (dplane_ctx_get_notif_provider(ctx) == 0) | |
3814 | zebra_mpls_lsp_dplane_result(ctx); | |
3815 | else | |
3816 | dplane_ctx_fini(&ctx); | |
3817 | } | |
3818 | break; | |
d37f4d6c | 3819 | |
104e3ad9 MS |
3820 | case DPLANE_OP_LSP_NOTIFY: |
3821 | zebra_mpls_process_dplane_notify(ctx); | |
d37f4d6c MS |
3822 | break; |
3823 | ||
9bd9717b MS |
3824 | case DPLANE_OP_PW_INSTALL: |
3825 | case DPLANE_OP_PW_UNINSTALL: | |
3826 | handle_pw_result(ctx); | |
3827 | break; | |
3828 | ||
cf363e1b MS |
3829 | case DPLANE_OP_SYS_ROUTE_ADD: |
3830 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
3831 | /* No further processing in zebra for these. */ | |
3832 | dplane_ctx_fini(&ctx); | |
3833 | break; | |
3834 | ||
036d93c0 MS |
3835 | case DPLANE_OP_MAC_INSTALL: |
3836 | case DPLANE_OP_MAC_DELETE: | |
3837 | zebra_vxlan_handle_result(ctx); | |
3838 | break; | |
3839 | ||
f62e5480 JU |
3840 | case DPLANE_OP_RULE_ADD: |
3841 | case DPLANE_OP_RULE_DELETE: | |
3842 | case DPLANE_OP_RULE_UPDATE: | |
3843 | zebra_pbr_dplane_result(ctx); | |
3844 | break; | |
3845 | ||
931fa60c MS |
3846 | /* Some op codes not handled here */ |
3847 | case DPLANE_OP_ADDR_INSTALL: | |
3848 | case DPLANE_OP_ADDR_UNINSTALL: | |
3849 | case DPLANE_OP_NEIGH_INSTALL: | |
3850 | case DPLANE_OP_NEIGH_UPDATE: | |
3851 | case DPLANE_OP_NEIGH_DELETE: | |
0bbd4ff4 MS |
3852 | case DPLANE_OP_VTEP_ADD: |
3853 | case DPLANE_OP_VTEP_DELETE: | |
d68e74b4 | 3854 | case DPLANE_OP_NEIGH_DISCOVER: |
931fa60c | 3855 | case DPLANE_OP_NONE: |
d37f4d6c MS |
3856 | /* Don't expect this: just return the struct? */ |
3857 | dplane_ctx_fini(&ctx); | |
3858 | break; | |
931fa60c | 3859 | |
d37f4d6c | 3860 | } /* Dispatch by op code */ |
4c206c8f MS |
3861 | |
3862 | ctx = dplane_ctx_dequeue(&ctxlist); | |
3863 | } | |
3864 | ||
5709131c | 3865 | } while (1); |
7cdb1a84 | 3866 | |
5709131c | 3867 | return 0; |
7cdb1a84 MS |
3868 | } |
3869 | ||
3870 | /* | |
3871 | * Results are returned from the dataplane subsystem, in the context of | |
1bcea841 | 3872 | * the dataplane pthread. We enqueue the results here for processing by |
7cdb1a84 MS |
3873 | * the main thread later. |
3874 | */ | |
4c206c8f | 3875 | static int rib_dplane_results(struct dplane_ctx_q *ctxlist) |
7cdb1a84 MS |
3876 | { |
3877 | /* Take lock controlling queue of results */ | |
00dffa8c | 3878 | frr_with_mutex(&dplane_mutex) { |
4c206c8f MS |
3879 | /* Enqueue context blocks */ |
3880 | dplane_ctx_list_append(&rib_dplane_q, ctxlist); | |
7cdb1a84 | 3881 | } |
7cdb1a84 | 3882 | |
4c206c8f | 3883 | /* Ensure event is signalled to zebra main pthread */ |
3801e764 | 3884 | thread_add_event(zrouter.master, rib_process_dplane_results, NULL, 0, |
7cdb1a84 MS |
3885 | &t_dplane); |
3886 | ||
5709131c | 3887 | return 0; |
7cdb1a84 MS |
3888 | } |
3889 | ||
eaa2716d SW |
3890 | /* |
3891 | * Ensure there are no empty slots in the route_info array. | |
3892 | * Every route type in zebra should be present there. | |
3893 | */ | |
3894 | static void check_route_info(void) | |
3895 | { | |
3896 | int len = array_size(route_info); | |
3897 | ||
3898 | /* | |
3899 | * ZEBRA_ROUTE_SYSTEM is special cased since | |
3900 | * its key is 0 anyway. | |
3901 | * | |
3902 | * ZEBRA_ROUTE_ALL is also ignored. | |
3903 | */ | |
3904 | for (int i = 0; i < len; i++) { | |
3905 | if (i == ZEBRA_ROUTE_SYSTEM || i == ZEBRA_ROUTE_ALL) | |
3906 | continue; | |
3907 | assert(route_info[i].key); | |
8dc7a759 | 3908 | assert(route_info[i].meta_q_map < MQ_SIZE); |
eaa2716d SW |
3909 | } |
3910 | } | |
3911 | ||
718e3744 | 3912 | /* Routing information base initialize. */ |
d62a17ae | 3913 | void rib_init(void) |
718e3744 | 3914 | { |
eaa2716d SW |
3915 | check_route_info(); |
3916 | ||
2561d12e | 3917 | rib_queue_init(); |
7cdb1a84 MS |
3918 | |
3919 | /* Init dataplane, and register for results */ | |
3920 | pthread_mutex_init(&dplane_mutex, NULL); | |
3921 | TAILQ_INIT(&rib_dplane_q); | |
4c206c8f | 3922 | zebra_dplane_init(rib_dplane_results); |
718e3744 | 3923 | } |
0915bb0c AS |
3924 | |
3925 | /* | |
3926 | * vrf_id_get_next | |
3927 | * | |
3928 | * Get the first vrf id that is greater than the given vrf id if any. | |
3929 | * | |
2951a7a4 | 3930 | * Returns true if a vrf id was found, false otherwise. |
0915bb0c | 3931 | */ |
d62a17ae | 3932 | static inline int vrf_id_get_next(vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 3933 | { |
d62a17ae | 3934 | struct vrf *vrf; |
b72ede27 | 3935 | |
d62a17ae | 3936 | vrf = vrf_lookup_by_id(vrf_id); |
3937 | if (vrf) { | |
3938 | vrf = RB_NEXT(vrf_id_head, vrf); | |
3939 | if (vrf) { | |
3940 | *next_id_p = vrf->vrf_id; | |
3941 | return 1; | |
3942 | } | |
3943 | } | |
0915bb0c | 3944 | |
d62a17ae | 3945 | return 0; |
0915bb0c AS |
3946 | } |
3947 | ||
3948 | /* | |
3949 | * rib_tables_iter_next | |
3950 | * | |
3951 | * Returns the next table in the iteration. | |
3952 | */ | |
d62a17ae | 3953 | struct route_table *rib_tables_iter_next(rib_tables_iter_t *iter) |
3954 | { | |
3955 | struct route_table *table; | |
3956 | ||
3957 | /* | |
3958 | * Array that helps us go over all AFI/SAFI combinations via one | |
3959 | * index. | |
3960 | */ | |
2b64873d | 3961 | static const struct { |
d62a17ae | 3962 | afi_t afi; |
3963 | safi_t safi; | |
3964 | } afi_safis[] = { | |
3965 | {AFI_IP, SAFI_UNICAST}, {AFI_IP, SAFI_MULTICAST}, | |
3966 | {AFI_IP, SAFI_LABELED_UNICAST}, {AFI_IP6, SAFI_UNICAST}, | |
3967 | {AFI_IP6, SAFI_MULTICAST}, {AFI_IP6, SAFI_LABELED_UNICAST}, | |
3968 | }; | |
3969 | ||
3970 | table = NULL; | |
3971 | ||
3972 | switch (iter->state) { | |
3973 | ||
3974 | case RIB_TABLES_ITER_S_INIT: | |
3975 | iter->vrf_id = VRF_DEFAULT; | |
3976 | iter->afi_safi_ix = -1; | |
3977 | ||
3978 | /* Fall through */ | |
3979 | ||
3980 | case RIB_TABLES_ITER_S_ITERATING: | |
3981 | iter->afi_safi_ix++; | |
3982 | while (1) { | |
3983 | ||
3984 | while (iter->afi_safi_ix | |
7e3a1ec7 | 3985 | < (int)array_size(afi_safis)) { |
d62a17ae | 3986 | table = zebra_vrf_table( |
3987 | afi_safis[iter->afi_safi_ix].afi, | |
3988 | afi_safis[iter->afi_safi_ix].safi, | |
3989 | iter->vrf_id); | |
3990 | if (table) | |
3991 | break; | |
3992 | ||
3993 | iter->afi_safi_ix++; | |
3994 | } | |
3995 | ||
3996 | /* | |
3997 | * Found another table in this vrf. | |
3998 | */ | |
3999 | if (table) | |
4000 | break; | |
4001 | ||
4002 | /* | |
4003 | * Done with all tables in the current vrf, go to the | |
4004 | * next | |
4005 | * one. | |
4006 | */ | |
4007 | if (!vrf_id_get_next(iter->vrf_id, &iter->vrf_id)) | |
4008 | break; | |
4009 | ||
4010 | iter->afi_safi_ix = 0; | |
4011 | } | |
0915bb0c | 4012 | |
0915bb0c AS |
4013 | break; |
4014 | ||
d62a17ae | 4015 | case RIB_TABLES_ITER_S_DONE: |
4016 | return NULL; | |
0915bb0c AS |
4017 | } |
4018 | ||
d62a17ae | 4019 | if (table) |
4020 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
4021 | else | |
4022 | iter->state = RIB_TABLES_ITER_S_DONE; | |
0915bb0c | 4023 | |
d62a17ae | 4024 | return table; |
0915bb0c | 4025 | } |