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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 | ||
b892f1dd | 23 | #include "if.h" |
718e3744 | 24 | #include "prefix.h" |
25 | #include "table.h" | |
26 | #include "memory.h" | |
4a1ab8e4 | 27 | #include "zebra_memory.h" |
718e3744 | 28 | #include "command.h" |
718e3744 | 29 | #include "log.h" |
deaa50db | 30 | #include "log_int.h" |
718e3744 | 31 | #include "sockunion.h" |
4d38fdb4 | 32 | #include "linklist.h" |
33 | #include "thread.h" | |
34 | #include "workqueue.h" | |
7514fb77 PJ |
35 | #include "prefix.h" |
36 | #include "routemap.h" | |
fb018d25 | 37 | #include "nexthop.h" |
b72ede27 | 38 | #include "vrf.h" |
40c7bdb0 | 39 | #include "mpls.h" |
05737783 | 40 | #include "srcdest_table.h" |
718e3744 | 41 | |
42 | #include "zebra/rib.h" | |
43 | #include "zebra/rt.h" | |
7c551956 | 44 | #include "zebra/zebra_ns.h" |
7c551956 | 45 | #include "zebra/zebra_vrf.h" |
718e3744 | 46 | #include "zebra/redistribute.h" |
8902474b | 47 | #include "zebra/zebra_routemap.h" |
718e3744 | 48 | #include "zebra/debug.h" |
fb018d25 | 49 | #include "zebra/zebra_rnh.h" |
88177fe3 | 50 | #include "zebra/interface.h" |
d44ca835 | 51 | #include "zebra/connected.h" |
6134fd82 | 52 | #include "zebra/zebra_vxlan.h" |
bf094f69 | 53 | #include "zebra/zapi_msg.h" |
718e3744 | 54 | |
d62a17ae | 55 | DEFINE_HOOK(rib_update, (struct route_node * rn, const char *reason), |
56 | (rn, reason)) | |
4f8ea50c | 57 | |
6baf7bb8 DS |
58 | /* Should we allow non Quagga processes to delete our routes */ |
59 | extern int allow_delete; | |
60 | ||
718e3744 | 61 | /* Each route type's string and default distance value. */ |
d62a17ae | 62 | static const struct { |
63 | int key; | |
64 | int distance; | |
65 | } route_info[ZEBRA_ROUTE_MAX] = { | |
9d303b37 DL |
66 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0}, |
67 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0}, | |
68 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0}, | |
69 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1}, | |
70 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120}, | |
71 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120}, | |
72 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110}, | |
73 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110}, | |
74 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115}, | |
75 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */}, | |
c710b277 DS |
76 | [ZEBRA_ROUTE_PIM] = {ZEBRA_ROUTE_PIM, 255}, |
77 | [ZEBRA_ROUTE_EIGRP] = {ZEBRA_ROUTE_EIGRP, 90}, | |
9d303b37 | 78 | [ZEBRA_ROUTE_NHRP] = {ZEBRA_ROUTE_NHRP, 10}, |
c710b277 DS |
79 | [ZEBRA_ROUTE_HSLS] = {ZEBRA_ROUTE_HSLS, 255}, |
80 | [ZEBRA_ROUTE_OLSR] = {ZEBRA_ROUTE_OLSR, 255}, | |
81 | [ZEBRA_ROUTE_TABLE] = {ZEBRA_ROUTE_TABLE, 150}, | |
82 | [ZEBRA_ROUTE_LDP] = {ZEBRA_ROUTE_LDP, 150}, | |
83 | [ZEBRA_ROUTE_VNC] = {ZEBRA_ROUTE_VNC, 20}, | |
84 | [ZEBRA_ROUTE_VNC_DIRECT] = {ZEBRA_ROUTE_VNC_DIRECT, 20}, | |
85 | [ZEBRA_ROUTE_VNC_DIRECT_RH] = {ZEBRA_ROUTE_VNC_DIRECT_RH, 20}, | |
86 | [ZEBRA_ROUTE_BGP_DIRECT] = {ZEBRA_ROUTE_BGP_DIRECT, 20}, | |
87 | [ZEBRA_ROUTE_BGP_DIRECT_EXT] = {ZEBRA_ROUTE_BGP_DIRECT_EXT, 20}, | |
88 | [ZEBRA_ROUTE_BABEL] = {ZEBRA_ROUTE_BABEL, 100}, | |
400a663b | 89 | [ZEBRA_ROUTE_SHARP] = {ZEBRA_ROUTE_SHARP, 150}, |
c710b277 | 90 | |
d62a17ae | 91 | /* no entry/default: 150 */ |
718e3744 | 92 | }; |
6b0655a2 | 93 | |
4623d897 DL |
94 | /* RPF lookup behaviour */ |
95 | static enum multicast_mode ipv4_multicast_mode = MCAST_NO_CONFIG; | |
96 | ||
6c4f4e6e | 97 | |
d62a17ae | 98 | static void __attribute__((format(printf, 5, 6))) |
99 | _rnode_zlog(const char *_func, vrf_id_t vrf_id, struct route_node *rn, | |
100 | int priority, const char *msgfmt, ...) | |
2263a412 | 101 | { |
d62a17ae | 102 | char buf[SRCDEST2STR_BUFFER + sizeof(" (MRIB)")]; |
103 | char msgbuf[512]; | |
104 | va_list ap; | |
2263a412 | 105 | |
d62a17ae | 106 | va_start(ap, msgfmt); |
107 | vsnprintf(msgbuf, sizeof(msgbuf), msgfmt, ap); | |
108 | va_end(ap); | |
2263a412 | 109 | |
d62a17ae | 110 | if (rn) { |
111 | rib_table_info_t *info = srcdest_rnode_table_info(rn); | |
112 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
cb653491 | 113 | |
d62a17ae | 114 | if (info->safi == SAFI_MULTICAST) |
115 | strcat(buf, " (MRIB)"); | |
116 | } else { | |
117 | snprintf(buf, sizeof(buf), "{(route_node *) NULL}"); | |
118 | } | |
2263a412 | 119 | |
d62a17ae | 120 | zlog(priority, "%s: %d:%s: %s", _func, vrf_id, buf, msgbuf); |
2263a412 DL |
121 | } |
122 | ||
d62a17ae | 123 | #define rnode_debug(node, vrf_id, ...) \ |
2263a412 | 124 | _rnode_zlog(__func__, vrf_id, node, LOG_DEBUG, __VA_ARGS__) |
d62a17ae | 125 | #define rnode_info(node, ...) \ |
2263a412 DL |
126 | _rnode_zlog(__func__, vrf_id, node, LOG_INFO, __VA_ARGS__) |
127 | ||
fd289fc8 | 128 | uint8_t route_distance(int type) |
40c7bdb0 | 129 | { |
fd289fc8 | 130 | uint8_t distance; |
40c7bdb0 | 131 | |
d62a17ae | 132 | if ((unsigned)type >= array_size(route_info)) |
133 | distance = 150; | |
134 | else | |
135 | distance = route_info[type].distance; | |
40c7bdb0 | 136 | |
d62a17ae | 137 | return distance; |
40c7bdb0 | 138 | } |
139 | ||
d7c0a89a | 140 | int is_zebra_valid_kernel_table(uint32_t table_id) |
7a4bb9c5 | 141 | { |
8f500a1c | 142 | #ifdef linux |
d62a17ae | 143 | if ((table_id == RT_TABLE_UNSPEC) || (table_id == RT_TABLE_LOCAL) |
144 | || (table_id == RT_TABLE_COMPAT)) | |
145 | return 0; | |
8f500a1c RW |
146 | #endif |
147 | ||
d62a17ae | 148 | return 1; |
7a4bb9c5 DS |
149 | } |
150 | ||
d7c0a89a | 151 | int is_zebra_main_routing_table(uint32_t table_id) |
7a4bb9c5 | 152 | { |
d62a17ae | 153 | if ((table_id == RT_TABLE_MAIN) |
154 | || (table_id == zebrad.rtm_table_default)) | |
155 | return 1; | |
156 | return 0; | |
7a4bb9c5 DS |
157 | } |
158 | ||
86391e56 | 159 | int zebra_check_addr(const struct prefix *p) |
0aabccc0 | 160 | { |
d62a17ae | 161 | if (p->family == AF_INET) { |
d7c0a89a | 162 | uint32_t addr; |
0aabccc0 | 163 | |
d62a17ae | 164 | addr = p->u.prefix4.s_addr; |
165 | addr = ntohl(addr); | |
0aabccc0 | 166 | |
d62a17ae | 167 | if (IPV4_NET127(addr) || IN_CLASSD(addr) |
168 | || IPV4_LINKLOCAL(addr)) | |
169 | return 0; | |
170 | } | |
171 | if (p->family == AF_INET6) { | |
172 | if (IN6_IS_ADDR_LOOPBACK(&p->u.prefix6)) | |
173 | return 0; | |
174 | if (IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
175 | return 0; | |
176 | } | |
177 | return 1; | |
0aabccc0 DD |
178 | } |
179 | ||
fa713d9e | 180 | /* Add nexthop to the end of a rib node's nexthop list */ |
d62a17ae | 181 | void route_entry_nexthop_add(struct route_entry *re, struct nexthop *nexthop) |
fa713d9e | 182 | { |
7ee30f28 | 183 | nexthop_add(&re->ng.nexthop, nexthop); |
d62a17ae | 184 | re->nexthop_num++; |
718e3744 | 185 | } |
186 | ||
6e26278c | 187 | |
6e26278c DS |
188 | /** |
189 | * copy_nexthop - copy a nexthop to the rib structure. | |
190 | */ | |
d62a17ae | 191 | void route_entry_copy_nexthops(struct route_entry *re, struct nexthop *nh) |
6e26278c | 192 | { |
7ee30f28 DS |
193 | assert(!re->ng.nexthop); |
194 | copy_nexthops(&re->ng.nexthop, nh, NULL); | |
d62a17ae | 195 | for (struct nexthop *nexthop = nh; nexthop; nexthop = nexthop->next) |
196 | re->nexthop_num++; | |
6e26278c DS |
197 | } |
198 | ||
718e3744 | 199 | /* Delete specified nexthop from the list. */ |
d62a17ae | 200 | void route_entry_nexthop_delete(struct route_entry *re, struct nexthop *nexthop) |
718e3744 | 201 | { |
d62a17ae | 202 | if (nexthop->next) |
203 | nexthop->next->prev = nexthop->prev; | |
204 | if (nexthop->prev) | |
205 | nexthop->prev->next = nexthop->next; | |
206 | else | |
7ee30f28 | 207 | re->ng.nexthop = nexthop->next; |
d62a17ae | 208 | re->nexthop_num--; |
718e3744 | 209 | } |
210 | ||
fa713d9e | 211 | |
d62a17ae | 212 | struct nexthop *route_entry_nexthop_ifindex_add(struct route_entry *re, |
4a7371e9 DS |
213 | ifindex_t ifindex, |
214 | vrf_id_t nh_vrf_id) | |
718e3744 | 215 | { |
d62a17ae | 216 | struct nexthop *nexthop; |
718e3744 | 217 | |
d62a17ae | 218 | nexthop = nexthop_new(); |
219 | nexthop->type = NEXTHOP_TYPE_IFINDEX; | |
220 | nexthop->ifindex = ifindex; | |
4a7371e9 | 221 | nexthop->vrf_id = nh_vrf_id; |
718e3744 | 222 | |
d62a17ae | 223 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 224 | |
d62a17ae | 225 | return nexthop; |
718e3744 | 226 | } |
227 | ||
d62a17ae | 228 | struct nexthop *route_entry_nexthop_ipv4_add(struct route_entry *re, |
229 | struct in_addr *ipv4, | |
4a7371e9 DS |
230 | struct in_addr *src, |
231 | vrf_id_t nh_vrf_id) | |
718e3744 | 232 | { |
d62a17ae | 233 | struct nexthop *nexthop; |
718e3744 | 234 | |
d62a17ae | 235 | nexthop = nexthop_new(); |
236 | nexthop->type = NEXTHOP_TYPE_IPV4; | |
4a7371e9 | 237 | nexthop->vrf_id = nh_vrf_id; |
d62a17ae | 238 | nexthop->gate.ipv4 = *ipv4; |
239 | if (src) | |
240 | nexthop->src.ipv4 = *src; | |
718e3744 | 241 | |
d62a17ae | 242 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 243 | |
d62a17ae | 244 | return nexthop; |
718e3744 | 245 | } |
246 | ||
d62a17ae | 247 | struct nexthop *route_entry_nexthop_ipv4_ifindex_add(struct route_entry *re, |
248 | struct in_addr *ipv4, | |
249 | struct in_addr *src, | |
4a7371e9 DS |
250 | ifindex_t ifindex, |
251 | vrf_id_t nh_vrf_id) | |
718e3744 | 252 | { |
d62a17ae | 253 | struct nexthop *nexthop; |
254 | struct interface *ifp; | |
718e3744 | 255 | |
d62a17ae | 256 | nexthop = nexthop_new(); |
4a7371e9 | 257 | nexthop->vrf_id = nh_vrf_id; |
d62a17ae | 258 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
259 | nexthop->gate.ipv4 = *ipv4; | |
260 | if (src) | |
261 | nexthop->src.ipv4 = *src; | |
262 | nexthop->ifindex = ifindex; | |
4a7371e9 | 263 | ifp = if_lookup_by_index(nexthop->ifindex, nh_vrf_id); |
d62a17ae | 264 | /*Pending: need to think if null ifp here is ok during bootup? |
265 | There was a crash because ifp here was coming to be NULL */ | |
266 | if (ifp) | |
996c9314 LB |
267 | if (connected_is_unnumbered(ifp) |
268 | || CHECK_FLAG(re->flags, ZEBRA_FLAG_EVPN_ROUTE)) { | |
d62a17ae | 269 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); |
270 | } | |
718e3744 | 271 | |
d62a17ae | 272 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 273 | |
d62a17ae | 274 | return nexthop; |
718e3744 | 275 | } |
276 | ||
d62a17ae | 277 | struct nexthop *route_entry_nexthop_ipv6_add(struct route_entry *re, |
4a7371e9 DS |
278 | struct in6_addr *ipv6, |
279 | vrf_id_t nh_vrf_id) | |
718e3744 | 280 | { |
d62a17ae | 281 | struct nexthop *nexthop; |
718e3744 | 282 | |
d62a17ae | 283 | nexthop = nexthop_new(); |
4a7371e9 | 284 | nexthop->vrf_id = nh_vrf_id; |
d62a17ae | 285 | nexthop->type = NEXTHOP_TYPE_IPV6; |
286 | nexthop->gate.ipv6 = *ipv6; | |
718e3744 | 287 | |
d62a17ae | 288 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 289 | |
d62a17ae | 290 | return nexthop; |
718e3744 | 291 | } |
292 | ||
d62a17ae | 293 | struct nexthop *route_entry_nexthop_ipv6_ifindex_add(struct route_entry *re, |
294 | struct in6_addr *ipv6, | |
4a7371e9 DS |
295 | ifindex_t ifindex, |
296 | vrf_id_t nh_vrf_id) | |
718e3744 | 297 | { |
d62a17ae | 298 | struct nexthop *nexthop; |
718e3744 | 299 | |
d62a17ae | 300 | nexthop = nexthop_new(); |
4a7371e9 | 301 | nexthop->vrf_id = nh_vrf_id; |
d62a17ae | 302 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
303 | nexthop->gate.ipv6 = *ipv6; | |
304 | nexthop->ifindex = ifindex; | |
1ec31309 | 305 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_EVPN_ROUTE)) |
306 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); | |
718e3744 | 307 | |
d62a17ae | 308 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 309 | |
d62a17ae | 310 | return nexthop; |
718e3744 | 311 | } |
718e3744 | 312 | |
a8309422 | 313 | struct nexthop *route_entry_nexthop_blackhole_add(struct route_entry *re, |
60466a63 | 314 | enum blackhole_type bh_type) |
595db7f1 | 315 | { |
d62a17ae | 316 | struct nexthop *nexthop; |
595db7f1 | 317 | |
d62a17ae | 318 | nexthop = nexthop_new(); |
4a7371e9 | 319 | nexthop->vrf_id = VRF_DEFAULT; |
d62a17ae | 320 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
a8309422 | 321 | nexthop->bh_type = bh_type; |
595db7f1 | 322 | |
d62a17ae | 323 | route_entry_nexthop_add(re, nexthop); |
595db7f1 | 324 | |
d62a17ae | 325 | return nexthop; |
595db7f1 | 326 | } |
327 | ||
86391e56 | 328 | static void nexthop_set_resolved(afi_t afi, const struct nexthop *newhop, |
d62a17ae | 329 | struct nexthop *nexthop) |
4491a88f | 330 | { |
d62a17ae | 331 | struct nexthop *resolved_hop; |
4491a88f | 332 | |
d62a17ae | 333 | resolved_hop = nexthop_new(); |
334 | SET_FLAG(resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
d855d11f | 335 | |
4a7371e9 | 336 | resolved_hop->vrf_id = nexthop->vrf_id; |
d855d11f RW |
337 | switch (newhop->type) { |
338 | case NEXTHOP_TYPE_IPV4: | |
339 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
340 | /* If the resolving route specifies a gateway, use it */ | |
d62a17ae | 341 | resolved_hop->type = newhop->type; |
342 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
4491a88f | 343 | |
d62a17ae | 344 | if (newhop->ifindex) { |
345 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
346 | resolved_hop->ifindex = newhop->ifindex; | |
347 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) | |
348 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
349 | } | |
d855d11f RW |
350 | break; |
351 | case NEXTHOP_TYPE_IPV6: | |
352 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
d62a17ae | 353 | resolved_hop->type = newhop->type; |
354 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
355 | ||
356 | if (newhop->ifindex) { | |
357 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
358 | resolved_hop->ifindex = newhop->ifindex; | |
359 | } | |
d855d11f RW |
360 | break; |
361 | case NEXTHOP_TYPE_IFINDEX: | |
362 | /* If the resolving route is an interface route, | |
363 | * it means the gateway we are looking up is connected | |
364 | * to that interface. (The actual network is _not_ onlink). | |
365 | * Therefore, the resolved route should have the original | |
366 | * gateway as nexthop as it is directly connected. | |
367 | * | |
368 | * On Linux, we have to set the onlink netlink flag because | |
369 | * otherwise, the kernel won't accept the route. | |
370 | */ | |
d62a17ae | 371 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; |
372 | if (afi == AFI_IP) { | |
373 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
374 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
375 | } else if (afi == AFI_IP6) { | |
376 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
377 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
378 | } | |
379 | resolved_hop->ifindex = newhop->ifindex; | |
d855d11f RW |
380 | break; |
381 | case NEXTHOP_TYPE_BLACKHOLE: | |
59693377 DS |
382 | resolved_hop->type = NEXTHOP_TYPE_BLACKHOLE; |
383 | resolved_hop->bh_type = nexthop->bh_type; | |
d855d11f | 384 | break; |
59693377 | 385 | } |
d855d11f | 386 | |
f674dfe2 RW |
387 | /* Copy labels of the resolved route */ |
388 | if (newhop->nh_label) | |
389 | nexthop_add_labels(resolved_hop, newhop->nh_label_type, | |
390 | newhop->nh_label->num_labels, | |
391 | &newhop->nh_label->label[0]); | |
392 | ||
d62a17ae | 393 | resolved_hop->rparent = nexthop; |
394 | nexthop_add(&nexthop->resolved, resolved_hop); | |
4491a88f DS |
395 | } |
396 | ||
718e3744 | 397 | /* If force flag is not set, do not modify falgs at all for uninstall |
398 | the route from FIB. */ | |
d62a17ae | 399 | static int nexthop_active(afi_t afi, struct route_entry *re, |
400 | struct nexthop *nexthop, int set, | |
401 | struct route_node *top) | |
402 | { | |
403 | struct prefix p; | |
404 | struct route_table *table; | |
405 | struct route_node *rn; | |
5f7a4718 | 406 | struct route_entry *match = NULL; |
d62a17ae | 407 | int resolved; |
408 | struct nexthop *newhop; | |
409 | struct interface *ifp; | |
5f7a4718 | 410 | rib_dest_t *dest; |
d62a17ae | 411 | |
412 | if ((nexthop->type == NEXTHOP_TYPE_IPV4) | |
413 | || nexthop->type == NEXTHOP_TYPE_IPV6) | |
414 | nexthop->ifindex = 0; | |
415 | ||
416 | if (set) { | |
417 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
d62a17ae | 418 | nexthops_free(nexthop->resolved); |
419 | nexthop->resolved = NULL; | |
420 | re->nexthop_mtu = 0; | |
d44ca835 | 421 | } |
18ff3edd | 422 | |
1ec31309 | 423 | /* Next hops (remote VTEPs) for EVPN routes are fully resolved. */ |
424 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_EVPN_RVTEP)) | |
425 | return 1; | |
426 | ||
d62a17ae | 427 | /* Skip nexthops that have been filtered out due to route-map */ |
428 | /* The nexthops are specific to this route and so the same */ | |
429 | /* nexthop for a different route may not have this flag set */ | |
430 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) | |
431 | return 0; | |
432 | ||
433 | /* | |
434 | * Check to see if we should trust the passed in information | |
435 | * for UNNUMBERED interfaces as that we won't find the GW | |
436 | * address in the routing table. | |
437 | */ | |
438 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) { | |
4a7371e9 | 439 | ifp = if_lookup_by_index(nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 440 | if (ifp && connected_is_unnumbered(ifp)) { |
441 | if (if_is_operative(ifp)) | |
442 | return 1; | |
443 | else | |
444 | return 0; | |
445 | } else | |
446 | return 0; | |
16814f96 | 447 | } |
718e3744 | 448 | |
d62a17ae | 449 | /* Make lookup prefix. */ |
450 | memset(&p, 0, sizeof(struct prefix)); | |
451 | switch (afi) { | |
452 | case AFI_IP: | |
453 | p.family = AF_INET; | |
454 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
455 | p.u.prefix4 = nexthop->gate.ipv4; | |
456 | break; | |
457 | case AFI_IP6: | |
458 | p.family = AF_INET6; | |
459 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
460 | p.u.prefix6 = nexthop->gate.ipv6; | |
461 | break; | |
462 | default: | |
463 | assert(afi != AFI_IP && afi != AFI_IP6); | |
464 | break; | |
718e3744 | 465 | } |
d62a17ae | 466 | /* Lookup table. */ |
4a7371e9 | 467 | table = zebra_vrf_table(afi, SAFI_UNICAST, nexthop->vrf_id); |
d62a17ae | 468 | if (!table) |
469 | return 0; | |
470 | ||
471 | rn = route_node_match(table, (struct prefix *)&p); | |
472 | while (rn) { | |
473 | route_unlock_node(rn); | |
474 | ||
fd7fd9e5 DS |
475 | /* Lookup should halt if we've matched against ourselves ('top', |
476 | * if specified) - i.e., we cannot have a nexthop NH1 is | |
477 | * resolved by a route NH1. The exception is if the route is a | |
478 | * host route. | |
479 | */ | |
480 | if (top && rn == top) | |
996c9314 LB |
481 | if (((afi == AFI_IP) && (rn->p.prefixlen != 32)) |
482 | || ((afi == AFI_IP6) && (rn->p.prefixlen != 128))) | |
fd7fd9e5 | 483 | return 0; |
d62a17ae | 484 | |
485 | /* Pick up selected route. */ | |
486 | /* However, do not resolve over default route unless explicitly | |
487 | * allowed. */ | |
488 | if (is_default_prefix(&rn->p) | |
44bdf159 | 489 | && !rnh_resolve_via_default(p.family)) |
d62a17ae | 490 | return 0; |
491 | ||
5f7a4718 | 492 | dest = rib_dest_from_rnode(rn); |
996c9314 LB |
493 | if (dest && dest->selected_fib |
494 | && !CHECK_FLAG(dest->selected_fib->status, | |
495 | ROUTE_ENTRY_REMOVED) | |
496 | && dest->selected_fib->type != ZEBRA_ROUTE_TABLE) | |
5f7a4718 | 497 | match = dest->selected_fib; |
48a53dc7 | 498 | |
d62a17ae | 499 | /* If there is no selected route or matched route is EGP, go up |
500 | tree. */ | |
501 | if (!match) { | |
502 | do { | |
503 | rn = rn->parent; | |
504 | } while (rn && rn->info == NULL); | |
505 | if (rn) | |
506 | route_lock_node(rn); | |
c87bdd2b | 507 | |
d62a17ae | 508 | continue; |
509 | } | |
510 | ||
d62a17ae | 511 | if (match->type == ZEBRA_ROUTE_CONNECT) { |
512 | /* Directly point connected route. */ | |
7ee30f28 | 513 | newhop = match->ng.nexthop; |
d62a17ae | 514 | if (newhop) { |
515 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
516 | || nexthop->type == NEXTHOP_TYPE_IPV6) | |
517 | nexthop->ifindex = newhop->ifindex; | |
518 | } | |
519 | return 1; | |
4e8b02f4 | 520 | } else if (CHECK_FLAG(re->flags, ZEBRA_FLAG_ALLOW_RECURSION)) { |
d62a17ae | 521 | resolved = 0; |
7ee30f28 | 522 | for (ALL_NEXTHOPS(match->ng, newhop)) { |
a8309422 DL |
523 | if (!CHECK_FLAG(newhop->flags, |
524 | NEXTHOP_FLAG_FIB)) | |
525 | continue; | |
526 | if (CHECK_FLAG(newhop->flags, | |
527 | NEXTHOP_FLAG_RECURSIVE)) | |
528 | continue; | |
529 | ||
530 | if (set) { | |
531 | SET_FLAG(nexthop->flags, | |
532 | NEXTHOP_FLAG_RECURSIVE); | |
533 | SET_FLAG(re->status, | |
534 | ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
535 | nexthop_set_resolved(afi, newhop, | |
536 | nexthop); | |
d62a17ae | 537 | } |
a8309422 DL |
538 | resolved = 1; |
539 | } | |
43e31305 JB |
540 | if (resolved && set) |
541 | re->nexthop_mtu = match->mtu; | |
d62a17ae | 542 | return resolved; |
543 | } else if (re->type == ZEBRA_ROUTE_STATIC) { | |
544 | resolved = 0; | |
7ee30f28 | 545 | for (ALL_NEXTHOPS(match->ng, newhop)) { |
a8309422 DL |
546 | if (!CHECK_FLAG(newhop->flags, |
547 | NEXTHOP_FLAG_FIB)) | |
548 | continue; | |
549 | ||
550 | if (set) { | |
551 | SET_FLAG(nexthop->flags, | |
552 | NEXTHOP_FLAG_RECURSIVE); | |
553 | nexthop_set_resolved(afi, newhop, | |
554 | nexthop); | |
d62a17ae | 555 | } |
a8309422 DL |
556 | resolved = 1; |
557 | } | |
d62a17ae | 558 | if (resolved && set) |
559 | re->nexthop_mtu = match->mtu; | |
560 | return resolved; | |
561 | } else { | |
562 | return 0; | |
563 | } | |
718e3744 | 564 | } |
d62a17ae | 565 | return 0; |
718e3744 | 566 | } |
718e3744 | 567 | |
d62a17ae | 568 | struct route_entry *rib_match(afi_t afi, safi_t safi, vrf_id_t vrf_id, |
569 | union g_addr *addr, struct route_node **rn_out) | |
570 | { | |
571 | struct prefix p; | |
572 | struct route_table *table; | |
573 | struct route_node *rn; | |
5f7a4718 | 574 | struct route_entry *match = NULL; |
d62a17ae | 575 | struct nexthop *newhop; |
576 | ||
577 | /* Lookup table. */ | |
578 | table = zebra_vrf_table(afi, safi, vrf_id); | |
579 | if (!table) | |
580 | return 0; | |
581 | ||
582 | memset(&p, 0, sizeof(struct prefix)); | |
583 | p.family = afi; | |
584 | if (afi == AFI_IP) { | |
585 | p.u.prefix4 = addr->ipv4; | |
586 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
587 | } else { | |
588 | p.u.prefix6 = addr->ipv6; | |
589 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
590 | } | |
718e3744 | 591 | |
d62a17ae | 592 | rn = route_node_match(table, (struct prefix *)&p); |
718e3744 | 593 | |
d62a17ae | 594 | while (rn) { |
5f7a4718 DS |
595 | rib_dest_t *dest; |
596 | ||
d62a17ae | 597 | route_unlock_node(rn); |
718e3744 | 598 | |
5f7a4718 | 599 | dest = rib_dest_from_rnode(rn); |
996c9314 LB |
600 | if (dest && dest->selected_fib |
601 | && !CHECK_FLAG(dest->selected_fib->status, | |
602 | ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 603 | match = dest->selected_fib; |
718e3744 | 604 | |
d62a17ae | 605 | /* If there is no selected route or matched route is EGP, go up |
606 | tree. */ | |
607 | if (!match) { | |
608 | do { | |
609 | rn = rn->parent; | |
610 | } while (rn && rn->info == NULL); | |
611 | if (rn) | |
612 | route_lock_node(rn); | |
613 | } else { | |
614 | if (match->type != ZEBRA_ROUTE_CONNECT) { | |
615 | int found = 0; | |
7ee30f28 | 616 | for (ALL_NEXTHOPS(match->ng, newhop)) |
d62a17ae | 617 | if (CHECK_FLAG(newhop->flags, |
618 | NEXTHOP_FLAG_FIB)) { | |
619 | found = 1; | |
620 | break; | |
621 | } | |
622 | if (!found) | |
623 | return NULL; | |
624 | } | |
625 | ||
626 | if (rn_out) | |
627 | *rn_out = rn; | |
628 | return match; | |
629 | } | |
16814f96 | 630 | } |
d62a17ae | 631 | return NULL; |
632 | } | |
633 | ||
634 | struct route_entry *rib_match_ipv4_multicast(vrf_id_t vrf_id, | |
635 | struct in_addr addr, | |
636 | struct route_node **rn_out) | |
637 | { | |
638 | struct route_entry *re = NULL, *mre = NULL, *ure = NULL; | |
639 | struct route_node *m_rn = NULL, *u_rn = NULL; | |
640 | union g_addr gaddr = {.ipv4 = addr}; | |
641 | ||
642 | switch (ipv4_multicast_mode) { | |
643 | case MCAST_MRIB_ONLY: | |
644 | return rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
645 | rn_out); | |
646 | case MCAST_URIB_ONLY: | |
647 | return rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, rn_out); | |
648 | case MCAST_NO_CONFIG: | |
649 | case MCAST_MIX_MRIB_FIRST: | |
650 | re = mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
651 | &m_rn); | |
652 | if (!mre) | |
653 | re = ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, | |
654 | &gaddr, &u_rn); | |
655 | break; | |
656 | case MCAST_MIX_DISTANCE: | |
657 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
658 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
659 | if (mre && ure) | |
660 | re = ure->distance < mre->distance ? ure : mre; | |
661 | else if (mre) | |
662 | re = mre; | |
663 | else if (ure) | |
664 | re = ure; | |
665 | break; | |
666 | case MCAST_MIX_PFXLEN: | |
667 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
668 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
669 | if (mre && ure) | |
670 | re = u_rn->p.prefixlen > m_rn->p.prefixlen ? ure : mre; | |
671 | else if (mre) | |
672 | re = mre; | |
673 | else if (ure) | |
674 | re = ure; | |
675 | break; | |
718e3744 | 676 | } |
33550aa8 | 677 | |
d62a17ae | 678 | if (rn_out) |
679 | *rn_out = (re == mre) ? m_rn : u_rn; | |
718e3744 | 680 | |
d62a17ae | 681 | if (IS_ZEBRA_DEBUG_RIB) { |
682 | char buf[BUFSIZ]; | |
683 | inet_ntop(AF_INET, &addr, buf, BUFSIZ); | |
4623d897 | 684 | |
32391aff DS |
685 | zlog_debug("%s: %s: vrf: %u found %s, using %s", |
686 | __func__, buf, vrf_id, | |
d62a17ae | 687 | mre ? (ure ? "MRIB+URIB" : "MRIB") |
688 | : ure ? "URIB" : "nothing", | |
689 | re == ure ? "URIB" : re == mre ? "MRIB" : "none"); | |
690 | } | |
691 | return re; | |
4623d897 DL |
692 | } |
693 | ||
d62a17ae | 694 | void multicast_mode_ipv4_set(enum multicast_mode mode) |
4623d897 | 695 | { |
d62a17ae | 696 | if (IS_ZEBRA_DEBUG_RIB) |
697 | zlog_debug("%s: multicast lookup mode set (%d)", __func__, | |
698 | mode); | |
699 | ipv4_multicast_mode = mode; | |
4623d897 DL |
700 | } |
701 | ||
d62a17ae | 702 | enum multicast_mode multicast_mode_ipv4_get(void) |
4623d897 | 703 | { |
d62a17ae | 704 | return ipv4_multicast_mode; |
4623d897 DL |
705 | } |
706 | ||
d62a17ae | 707 | struct route_entry *rib_lookup_ipv4(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 708 | { |
d62a17ae | 709 | struct route_table *table; |
710 | struct route_node *rn; | |
5f7a4718 | 711 | struct route_entry *match = NULL; |
d62a17ae | 712 | struct nexthop *nexthop; |
5f7a4718 | 713 | rib_dest_t *dest; |
718e3744 | 714 | |
d62a17ae | 715 | /* Lookup table. */ |
716 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
717 | if (!table) | |
718 | return 0; | |
718e3744 | 719 | |
d62a17ae | 720 | rn = route_node_lookup(table, (struct prefix *)p); |
718e3744 | 721 | |
d62a17ae | 722 | /* No route for this prefix. */ |
723 | if (!rn) | |
724 | return NULL; | |
718e3744 | 725 | |
d62a17ae | 726 | /* Unlock node. */ |
727 | route_unlock_node(rn); | |
5f7a4718 | 728 | dest = rib_dest_from_rnode(rn); |
718e3744 | 729 | |
996c9314 LB |
730 | if (dest && dest->selected_fib |
731 | && !CHECK_FLAG(dest->selected_fib->status, ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 732 | match = dest->selected_fib; |
718e3744 | 733 | |
d62a17ae | 734 | if (!match) |
735 | return NULL; | |
718e3744 | 736 | |
d62a17ae | 737 | if (match->type == ZEBRA_ROUTE_CONNECT) |
738 | return match; | |
f9e1b38e | 739 | |
7ee30f28 | 740 | for (ALL_NEXTHOPS(match->ng, nexthop)) |
d62a17ae | 741 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) |
742 | return match; | |
718e3744 | 743 | |
d62a17ae | 744 | return NULL; |
718e3744 | 745 | } |
746 | ||
dc95824a DO |
747 | /* |
748 | * This clone function, unlike its original rib_lookup_ipv4(), checks | |
749 | * if specified IPv4 route record (prefix/mask -> gate) exists in | |
f0f77c9a | 750 | * the whole RIB and has ROUTE_ENTRY_SELECTED_FIB set. |
dc95824a DO |
751 | * |
752 | * Return values: | |
753 | * -1: error | |
754 | * 0: exact match found | |
755 | * 1: a match was found with a different gate | |
756 | * 2: connected route found | |
757 | * 3: no matches found | |
758 | */ | |
d62a17ae | 759 | int rib_lookup_ipv4_route(struct prefix_ipv4 *p, union sockunion *qgate, |
760 | vrf_id_t vrf_id) | |
dc95824a | 761 | { |
d62a17ae | 762 | struct route_table *table; |
763 | struct route_node *rn; | |
5f7a4718 | 764 | struct route_entry *match = NULL; |
d62a17ae | 765 | struct nexthop *nexthop; |
766 | int nexthops_active; | |
5f7a4718 | 767 | rib_dest_t *dest; |
dc95824a | 768 | |
d62a17ae | 769 | /* Lookup table. */ |
770 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
771 | if (!table) | |
772 | return ZEBRA_RIB_LOOKUP_ERROR; | |
dc95824a | 773 | |
d62a17ae | 774 | /* Scan the RIB table for exactly matching RIB entry. */ |
775 | rn = route_node_lookup(table, (struct prefix *)p); | |
dc95824a | 776 | |
d62a17ae | 777 | /* No route for this prefix. */ |
778 | if (!rn) | |
779 | return ZEBRA_RIB_NOTFOUND; | |
dc95824a | 780 | |
d62a17ae | 781 | /* Unlock node. */ |
782 | route_unlock_node(rn); | |
5f7a4718 | 783 | dest = rib_dest_from_rnode(rn); |
dc95824a | 784 | |
d62a17ae | 785 | /* Find out if a "selected" RR for the discovered RIB entry exists ever. |
786 | */ | |
996c9314 LB |
787 | if (dest && dest->selected_fib |
788 | && !CHECK_FLAG(dest->selected_fib->status, ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 789 | match = dest->selected_fib; |
dc95824a | 790 | |
d62a17ae | 791 | /* None such found :( */ |
792 | if (!match) | |
793 | return ZEBRA_RIB_NOTFOUND; | |
794 | ||
795 | if (match->type == ZEBRA_ROUTE_CONNECT) | |
796 | return ZEBRA_RIB_FOUND_CONNECTED; | |
797 | ||
798 | /* Ok, we have a cood candidate, let's check it's nexthop list... */ | |
799 | nexthops_active = 0; | |
7ee30f28 | 800 | for (ALL_NEXTHOPS(match->ng, nexthop)) |
d62a17ae | 801 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { |
802 | nexthops_active = 1; | |
803 | if (nexthop->gate.ipv4.s_addr == sockunion2ip(qgate)) | |
804 | return ZEBRA_RIB_FOUND_EXACT; | |
805 | if (IS_ZEBRA_DEBUG_RIB) { | |
806 | char gate_buf[INET_ADDRSTRLEN], | |
807 | qgate_buf[INET_ADDRSTRLEN]; | |
808 | inet_ntop(AF_INET, &nexthop->gate.ipv4.s_addr, | |
809 | gate_buf, INET_ADDRSTRLEN); | |
810 | inet_ntop(AF_INET, &sockunion2ip(qgate), | |
811 | qgate_buf, INET_ADDRSTRLEN); | |
812 | zlog_debug("%s: qgate == %s, %s == %s", | |
813 | __func__, qgate_buf, | |
814 | nexthop->rparent ? "rgate" : "gate", | |
815 | gate_buf); | |
816 | } | |
817 | } | |
818 | ||
819 | if (nexthops_active) | |
820 | return ZEBRA_RIB_FOUND_NOGATE; | |
821 | ||
822 | return ZEBRA_RIB_NOTFOUND; | |
823 | } | |
824 | ||
825 | #define RIB_SYSTEM_ROUTE(R) \ | |
826 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
7514fb77 | 827 | |
dc95824a DO |
828 | /* This function verifies reachability of one given nexthop, which can be |
829 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
830 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
831 | * nexthop->ifindex will be updated appropriately as well. | |
832 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
833 | * not vice versa. | |
834 | * | |
835 | * The return value is the final value of 'ACTIVE' flag. | |
836 | */ | |
837 | ||
d62a17ae | 838 | static unsigned nexthop_active_check(struct route_node *rn, |
839 | struct route_entry *re, | |
840 | struct nexthop *nexthop, int set) | |
841 | { | |
842 | struct interface *ifp; | |
843 | route_map_result_t ret = RMAP_MATCH; | |
844 | int family; | |
845 | char buf[SRCDEST2STR_BUFFER]; | |
86391e56 | 846 | const struct prefix *p, *src_p; |
d62a17ae | 847 | srcdest_rnode_prefixes(rn, &p, &src_p); |
848 | ||
849 | if (rn->p.family == AF_INET) | |
850 | family = AFI_IP; | |
851 | else if (rn->p.family == AF_INET6) | |
852 | family = AFI_IP6; | |
853 | else | |
854 | family = 0; | |
855 | switch (nexthop->type) { | |
856 | case NEXTHOP_TYPE_IFINDEX: | |
4a7371e9 | 857 | ifp = if_lookup_by_index(nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 858 | if (ifp && if_is_operative(ifp)) |
859 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
860 | else | |
861 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
862 | break; | |
863 | case NEXTHOP_TYPE_IPV4: | |
864 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
865 | family = AFI_IP; | |
1ec31309 | 866 | if (nexthop_active(AFI_IP, re, nexthop, set, rn)) |
d62a17ae | 867 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
868 | else | |
869 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
870 | break; | |
871 | case NEXTHOP_TYPE_IPV6: | |
872 | family = AFI_IP6; | |
873 | if (nexthop_active(AFI_IP6, re, nexthop, set, rn)) | |
874 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
875 | else | |
876 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
877 | break; | |
878 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
879 | /* RFC 5549, v4 prefix with v6 NH */ | |
880 | if (rn->p.family != AF_INET) | |
881 | family = AFI_IP6; | |
882 | if (IN6_IS_ADDR_LINKLOCAL(&nexthop->gate.ipv6)) { | |
007dbee6 | 883 | ifp = if_lookup_by_index(nexthop->ifindex, |
4a7371e9 | 884 | nexthop->vrf_id); |
d62a17ae | 885 | if (ifp && if_is_operative(ifp)) |
886 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
887 | else | |
888 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
889 | } else { | |
890 | if (nexthop_active(AFI_IP6, re, nexthop, set, rn)) | |
891 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
892 | else | |
893 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
894 | } | |
895 | break; | |
896 | case NEXTHOP_TYPE_BLACKHOLE: | |
897 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
898 | break; | |
899 | default: | |
900 | break; | |
901 | } | |
902 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
903 | return 0; | |
904 | ||
905 | /* XXX: What exactly do those checks do? Do we support | |
906 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? */ | |
907 | if (RIB_SYSTEM_ROUTE(re) || (family == AFI_IP && p->family != AF_INET) | |
908 | || (family == AFI_IP6 && p->family != AF_INET6)) | |
909 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
910 | ||
911 | /* The original code didn't determine the family correctly | |
912 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
913 | * from the rib_table_info in those cases. | |
914 | * Possibly it may be better to use only the rib_table_info | |
915 | * in every case. | |
916 | */ | |
917 | if (!family) { | |
918 | rib_table_info_t *info; | |
919 | ||
920 | info = srcdest_rnode_table_info(rn); | |
921 | family = info->afi; | |
718e3744 | 922 | } |
c52ef59f | 923 | |
d62a17ae | 924 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
925 | ||
926 | /* It'll get set if required inside */ | |
633a66a5 | 927 | ret = zebra_route_map_check(family, re->type, re->instance, p, nexthop, |
4a7371e9 | 928 | nexthop->vrf_id, re->tag); |
d62a17ae | 929 | if (ret == RMAP_DENYMATCH) { |
930 | if (IS_ZEBRA_DEBUG_RIB) { | |
931 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
932 | zlog_debug( | |
933 | "%u:%s: Filtering out with NH out %s due to route map", | |
934 | re->vrf_id, buf, | |
99b9d960 | 935 | ifindex2ifname(nexthop->ifindex, |
4a7371e9 | 936 | nexthop->vrf_id)); |
d62a17ae | 937 | } |
938 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
518f0eb1 | 939 | } |
d62a17ae | 940 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
718e3744 | 941 | } |
942 | ||
03e232a4 | 943 | /* Iterate over all nexthops of the given RIB entry and refresh their |
f0f77c9a DS |
944 | * ACTIVE flag. re->nexthop_active_num is updated accordingly. If any |
945 | * nexthop is found to toggle the ACTIVE flag, the whole re structure | |
946 | * is flagged with ROUTE_ENTRY_CHANGED. The 4th 'set' argument is | |
03e232a4 DO |
947 | * transparently passed to nexthop_active_check(). |
948 | * | |
949 | * Return value is the new number of active nexthops. | |
950 | */ | |
951 | ||
d62a17ae | 952 | static int nexthop_active_update(struct route_node *rn, struct route_entry *re, |
953 | int set) | |
954 | { | |
955 | struct nexthop *nexthop; | |
956 | union g_addr prev_src; | |
957 | unsigned int prev_active, new_active, old_num_nh; | |
958 | ifindex_t prev_index; | |
959 | old_num_nh = re->nexthop_active_num; | |
960 | ||
961 | re->nexthop_active_num = 0; | |
962 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
963 | ||
7ee30f28 | 964 | for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) { |
d62a17ae | 965 | /* No protocol daemon provides src and so we're skipping |
966 | * tracking it */ | |
967 | prev_src = nexthop->rmap_src; | |
968 | prev_active = CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
969 | prev_index = nexthop->ifindex; | |
970 | if ((new_active = nexthop_active_check(rn, re, nexthop, set))) | |
971 | re->nexthop_active_num++; | |
972 | /* Don't allow src setting on IPv6 addr for now */ | |
973 | if (prev_active != new_active || prev_index != nexthop->ifindex | |
974 | || ((nexthop->type >= NEXTHOP_TYPE_IFINDEX | |
975 | && nexthop->type < NEXTHOP_TYPE_IPV6) | |
976 | && prev_src.ipv4.s_addr | |
977 | != nexthop->rmap_src.ipv4.s_addr) | |
978 | || ((nexthop->type >= NEXTHOP_TYPE_IPV6 | |
979 | && nexthop->type < NEXTHOP_TYPE_BLACKHOLE) | |
980 | && !(IPV6_ADDR_SAME(&prev_src.ipv6, | |
981 | &nexthop->rmap_src.ipv6)))) { | |
982 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
983 | SET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
984 | } | |
985 | } | |
986 | ||
987 | if (old_num_nh != re->nexthop_active_num) | |
988 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
6e26278c | 989 | |
d62a17ae | 990 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED)) { |
991 | SET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
992 | } | |
993 | ||
994 | return re->nexthop_active_num; | |
718e3744 | 995 | } |
6baeb988 | 996 | |
a64448ba DS |
997 | /* |
998 | * Is this RIB labeled-unicast? It must be of type BGP and all paths | |
999 | * (nexthops) must have a label. | |
1000 | */ | |
d62a17ae | 1001 | int zebra_rib_labeled_unicast(struct route_entry *re) |
a64448ba | 1002 | { |
d62a17ae | 1003 | struct nexthop *nexthop = NULL; |
a64448ba | 1004 | |
d62a17ae | 1005 | if (re->type != ZEBRA_ROUTE_BGP) |
1006 | return 0; | |
a64448ba | 1007 | |
7ee30f28 | 1008 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
d62a17ae | 1009 | if (!nexthop->nh_label || !nexthop->nh_label->num_labels) |
1010 | return 0; | |
6b0655a2 | 1011 | |
d62a17ae | 1012 | return 1; |
a64448ba | 1013 | } |
718e3744 | 1014 | |
86391e56 | 1015 | void kernel_route_rib_pass_fail(struct route_node *rn, const struct prefix *p, |
7d974ba3 | 1016 | struct route_entry *re, |
215181cb | 1017 | enum dp_results res) |
0c555cc6 DS |
1018 | { |
1019 | struct nexthop *nexthop; | |
1020 | char buf[PREFIX_STRLEN]; | |
ed216282 DS |
1021 | rib_dest_t *dest; |
1022 | ||
1023 | dest = rib_dest_from_rnode(rn); | |
0c555cc6 DS |
1024 | |
1025 | switch (res) { | |
215181cb | 1026 | case DP_INSTALL_SUCCESS: |
ed216282 | 1027 | dest->selected_fib = re; |
7ee30f28 | 1028 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
0c555cc6 DS |
1029 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) |
1030 | continue; | |
1031 | ||
1032 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1033 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1034 | else | |
1035 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1036 | } | |
28610f7e | 1037 | zsend_route_notify_owner(re, p, ZAPI_ROUTE_INSTALLED); |
0c555cc6 | 1038 | break; |
215181cb | 1039 | case DP_INSTALL_FAILURE: |
ed216282 DS |
1040 | /* |
1041 | * I am not sure this is the right thing to do here | |
1042 | * but the code always set selected_fib before | |
1043 | * this assignment was moved here. | |
1044 | */ | |
1045 | dest->selected_fib = re; | |
1046 | ||
28610f7e | 1047 | zsend_route_notify_owner(re, p, ZAPI_ROUTE_FAIL_INSTALL); |
0c555cc6 DS |
1048 | zlog_warn("%u:%s: Route install failed", re->vrf_id, |
1049 | prefix2str(p, buf, sizeof(buf))); | |
1050 | break; | |
215181cb | 1051 | case DP_DELETE_SUCCESS: |
ed216282 DS |
1052 | /* |
1053 | * The case where selected_fib is not re is | |
1054 | * when we have received a system route | |
1055 | * that is overriding our installed route | |
1056 | * as such we should leave the selected_fib | |
1057 | * pointer alone | |
1058 | */ | |
1059 | if (dest->selected_fib == re) | |
1060 | dest->selected_fib = NULL; | |
7ee30f28 | 1061 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
0c555cc6 | 1062 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
5e54c602 DS |
1063 | |
1064 | zsend_route_notify_owner(re, p, ZAPI_ROUTE_REMOVED); | |
0c555cc6 | 1065 | break; |
215181cb | 1066 | case DP_DELETE_FAILURE: |
ed216282 DS |
1067 | /* |
1068 | * Should we set this to NULL if the | |
1069 | * delete fails? | |
1070 | */ | |
1071 | dest->selected_fib = NULL; | |
0c555cc6 DS |
1072 | zlog_warn("%u:%s: Route Deletion failure", re->vrf_id, |
1073 | prefix2str(p, buf, sizeof(buf))); | |
5e54c602 DS |
1074 | |
1075 | zsend_route_notify_owner(re, p, ZAPI_ROUTE_REMOVE_FAIL); | |
0c555cc6 DS |
1076 | break; |
1077 | } | |
1078 | } | |
1079 | ||
6ae24471 DS |
1080 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
1081 | * is only used for IPv4. | |
1082 | */ | |
0c555cc6 DS |
1083 | void rib_install_kernel(struct route_node *rn, struct route_entry *re, |
1084 | struct route_entry *old) | |
718e3744 | 1085 | { |
d62a17ae | 1086 | struct nexthop *nexthop; |
1087 | rib_table_info_t *info = srcdest_rnode_table_info(rn); | |
86391e56 | 1088 | const struct prefix *p, *src_p; |
d62a17ae | 1089 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
718e3744 | 1090 | |
d62a17ae | 1091 | srcdest_rnode_prefixes(rn, &p, &src_p); |
416ec78d | 1092 | |
d62a17ae | 1093 | if (info->safi != SAFI_UNICAST) { |
7ee30f28 | 1094 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
d62a17ae | 1095 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 1096 | return; |
25b9cb0c DL |
1097 | } else { |
1098 | struct nexthop *prev; | |
1099 | ||
7ee30f28 | 1100 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
25b9cb0c | 1101 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_DUPLICATE); |
7ee30f28 | 1102 | for (ALL_NEXTHOPS(re->ng, prev)) { |
25b9cb0c DL |
1103 | if (prev == nexthop) |
1104 | break; | |
996c9314 LB |
1105 | if (nexthop_same_firsthop(nexthop, prev)) { |
1106 | SET_FLAG(nexthop->flags, | |
1107 | NEXTHOP_FLAG_DUPLICATE); | |
25b9cb0c DL |
1108 | break; |
1109 | } | |
1110 | } | |
1111 | } | |
d62a17ae | 1112 | } |
718e3744 | 1113 | |
2063a814 DS |
1114 | /* |
1115 | * If this is a replace to a new RE let the originator of the RE | |
1116 | * know that they've lost | |
1117 | */ | |
9a9f8926 | 1118 | if (old && (old != re) && (old->type != re->type)) |
28610f7e | 1119 | zsend_route_notify_owner(old, p, ZAPI_ROUTE_BETTER_ADMIN_WON); |
25b9cb0c | 1120 | |
d62a17ae | 1121 | /* |
1122 | * Make sure we update the FPM any time we send new information to | |
1123 | * the kernel. | |
1124 | */ | |
1125 | hook_call(rib_update, rn, "installing in kernel"); | |
1e885672 DS |
1126 | switch (kernel_route_rib(rn, p, src_p, old, re)) { |
1127 | case DP_REQUEST_QUEUED: | |
1128 | zlog_err("No current known DataPlane interfaces can return this, please fix"); | |
1129 | break; | |
1130 | case DP_REQUEST_FAILURE: | |
1131 | zlog_err("No current known Rib Install Failure cases, please fix"); | |
1132 | break; | |
1133 | case DP_REQUEST_SUCCESS: | |
1134 | zvrf->installs++; | |
1135 | break; | |
1136 | } | |
d62a17ae | 1137 | |
0c555cc6 | 1138 | return; |
718e3744 | 1139 | } |
1140 | ||
1141 | /* Uninstall the route from kernel. */ | |
0c555cc6 | 1142 | void rib_uninstall_kernel(struct route_node *rn, struct route_entry *re) |
718e3744 | 1143 | { |
d62a17ae | 1144 | struct nexthop *nexthop; |
1145 | rib_table_info_t *info = srcdest_rnode_table_info(rn); | |
86391e56 | 1146 | const struct prefix *p, *src_p; |
d62a17ae | 1147 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
05737783 | 1148 | |
d62a17ae | 1149 | srcdest_rnode_prefixes(rn, &p, &src_p); |
718e3744 | 1150 | |
d62a17ae | 1151 | if (info->safi != SAFI_UNICAST) { |
7ee30f28 | 1152 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
d6792f9d | 1153 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 1154 | return; |
d62a17ae | 1155 | } |
416ec78d | 1156 | |
d62a17ae | 1157 | /* |
1158 | * Make sure we update the FPM any time we send new information to | |
1159 | * the kernel. | |
1160 | */ | |
1161 | hook_call(rib_update, rn, "uninstalling from kernel"); | |
1e885672 DS |
1162 | switch (kernel_route_rib(rn, p, src_p, re, NULL)) { |
1163 | case DP_REQUEST_QUEUED: | |
1164 | zlog_err("No current known DataPlane interfaces can return this, please fix"); | |
1165 | break; | |
1166 | case DP_REQUEST_FAILURE: | |
1167 | zlog_err("No current known RIB Install Failure cases, please fix"); | |
1168 | break; | |
1169 | case DP_REQUEST_SUCCESS: | |
1170 | if (zvrf) | |
1171 | zvrf->removals++; | |
1172 | break; | |
1173 | } | |
718e3744 | 1174 | |
0c555cc6 | 1175 | return; |
718e3744 | 1176 | } |
1177 | ||
1178 | /* Uninstall the route from kernel. */ | |
d62a17ae | 1179 | static void rib_uninstall(struct route_node *rn, struct route_entry *re) |
718e3744 | 1180 | { |
d62a17ae | 1181 | rib_table_info_t *info = srcdest_rnode_table_info(rn); |
5f7a4718 | 1182 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
416ec78d | 1183 | |
5f7a4718 | 1184 | if (dest && dest->selected_fib == re) { |
d62a17ae | 1185 | if (info->safi == SAFI_UNICAST) |
1186 | hook_call(rib_update, rn, "rib_uninstall"); | |
5adc2528 | 1187 | |
d62a17ae | 1188 | if (!RIB_SYSTEM_ROUTE(re)) |
1189 | rib_uninstall_kernel(rn, re); | |
a64448ba | 1190 | |
d62a17ae | 1191 | /* If labeled-unicast route, uninstall transit LSP. */ |
1192 | if (zebra_rib_labeled_unicast(re)) | |
1193 | zebra_mpls_lsp_uninstall(info->zvrf, rn, re); | |
d62a17ae | 1194 | } |
446bb95e | 1195 | |
d62a17ae | 1196 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { |
86391e56 MS |
1197 | const struct prefix *p, *src_p; |
1198 | ||
d62a17ae | 1199 | srcdest_rnode_prefixes(rn, &p, &src_p); |
05737783 | 1200 | |
d62a17ae | 1201 | redistribute_delete(p, src_p, re); |
1202 | UNSET_FLAG(re->flags, ZEBRA_FLAG_SELECTED); | |
1203 | } | |
718e3744 | 1204 | } |
1205 | ||
9fd92e3c AS |
1206 | /* |
1207 | * rib_can_delete_dest | |
1208 | * | |
1209 | * Returns TRUE if the given dest can be deleted from the table. | |
1210 | */ | |
d62a17ae | 1211 | static int rib_can_delete_dest(rib_dest_t *dest) |
9fd92e3c | 1212 | { |
d62a17ae | 1213 | if (dest->routes) { |
1214 | return 0; | |
1215 | } | |
9fd92e3c | 1216 | |
d62a17ae | 1217 | /* |
1218 | * Don't delete the dest if we have to update the FPM about this | |
1219 | * prefix. | |
1220 | */ | |
1221 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_FPM) | |
1222 | || CHECK_FLAG(dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1223 | return 0; | |
5adc2528 | 1224 | |
d62a17ae | 1225 | return 1; |
9fd92e3c AS |
1226 | } |
1227 | ||
1228 | /* | |
1229 | * rib_gc_dest | |
1230 | * | |
1231 | * Garbage collect the rib dest corresponding to the given route node | |
1232 | * if appropriate. | |
1233 | * | |
1234 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1235 | */ | |
d62a17ae | 1236 | int rib_gc_dest(struct route_node *rn) |
9fd92e3c | 1237 | { |
d62a17ae | 1238 | rib_dest_t *dest; |
9fd92e3c | 1239 | |
d62a17ae | 1240 | dest = rib_dest_from_rnode(rn); |
1241 | if (!dest) | |
1242 | return 0; | |
9fd92e3c | 1243 | |
d62a17ae | 1244 | if (!rib_can_delete_dest(dest)) |
1245 | return 0; | |
9fd92e3c | 1246 | |
c9abf558 DS |
1247 | if (IS_ZEBRA_DEBUG_RIB) { |
1248 | struct zebra_vrf *zvrf; | |
1249 | ||
1250 | zvrf = rib_dest_vrf(dest); | |
d62a17ae | 1251 | rnode_debug(rn, zvrf_id(zvrf), "removing dest from table"); |
c9abf558 | 1252 | } |
9fd92e3c | 1253 | |
d62a17ae | 1254 | dest->rnode = NULL; |
1255 | XFREE(MTYPE_RIB_DEST, dest); | |
1256 | rn->info = NULL; | |
9fd92e3c | 1257 | |
d62a17ae | 1258 | /* |
1259 | * Release the one reference that we keep on the route node. | |
1260 | */ | |
1261 | route_unlock_node(rn); | |
1262 | return 1; | |
9fd92e3c AS |
1263 | } |
1264 | ||
d62a17ae | 1265 | static void rib_process_add_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
1266 | struct route_entry *new) | |
3e5c6e00 | 1267 | { |
5f7a4718 DS |
1268 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
1269 | ||
d62a17ae | 1270 | hook_call(rib_update, rn, "new route selected"); |
3e5c6e00 | 1271 | |
d62a17ae | 1272 | /* Update real nexthop. This may actually determine if nexthop is active |
1273 | * or not. */ | |
1274 | if (!nexthop_active_update(rn, new, 1)) { | |
1275 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); | |
1276 | return; | |
1277 | } | |
3e5c6e00 | 1278 | |
d62a17ae | 1279 | if (IS_ZEBRA_DEBUG_RIB) { |
1280 | char buf[SRCDEST2STR_BUFFER]; | |
1281 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1282 | zlog_debug("%u:%s: Adding route rn %p, re %p (type %d)", | |
1283 | zvrf_id(zvrf), buf, rn, new, new->type); | |
1284 | } | |
3e5c6e00 | 1285 | |
d62a17ae | 1286 | /* If labeled-unicast route, install transit LSP. */ |
1287 | if (zebra_rib_labeled_unicast(new)) | |
1288 | zebra_mpls_lsp_install(zvrf, rn, new); | |
a64448ba | 1289 | |
0c555cc6 DS |
1290 | if (!RIB_SYSTEM_ROUTE(new)) |
1291 | rib_install_kernel(rn, new, NULL); | |
ed216282 DS |
1292 | else |
1293 | dest->selected_fib = new; | |
3e5c6e00 | 1294 | |
d62a17ae | 1295 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
3e5c6e00 | 1296 | } |
1297 | ||
d62a17ae | 1298 | static void rib_process_del_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
1299 | struct route_entry *old) | |
3e5c6e00 | 1300 | { |
5f7a4718 | 1301 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
d62a17ae | 1302 | hook_call(rib_update, rn, "removing existing route"); |
3e5c6e00 | 1303 | |
d62a17ae | 1304 | /* Uninstall from kernel. */ |
1305 | if (IS_ZEBRA_DEBUG_RIB) { | |
1306 | char buf[SRCDEST2STR_BUFFER]; | |
1307 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1308 | zlog_debug("%u:%s: Deleting route rn %p, re %p (type %d)", | |
1309 | zvrf_id(zvrf), buf, rn, old, old->type); | |
1310 | } | |
3e5c6e00 | 1311 | |
d62a17ae | 1312 | /* If labeled-unicast route, uninstall transit LSP. */ |
1313 | if (zebra_rib_labeled_unicast(old)) | |
1314 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
1315 | ||
1316 | if (!RIB_SYSTEM_ROUTE(old)) | |
1317 | rib_uninstall_kernel(rn, old); | |
ed216282 DS |
1318 | else { |
1319 | /* | |
1320 | * We are setting this to NULL here | |
1321 | * because that is what we traditionally | |
1322 | * have been doing. I am not positive | |
1323 | * that this is the right thing to do | |
1324 | * but let's leave the code alone | |
1325 | * for the RIB_SYSTEM_ROUTE case | |
1326 | */ | |
1327 | dest->selected_fib = NULL; | |
1328 | } | |
d62a17ae | 1329 | |
1330 | /* Update nexthop for route, reset changed flag. */ | |
1331 | nexthop_active_update(rn, old, 1); | |
1332 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); | |
1333 | } | |
1334 | ||
1335 | static void rib_process_update_fib(struct zebra_vrf *zvrf, | |
1336 | struct route_node *rn, | |
1337 | struct route_entry *old, | |
1338 | struct route_entry *new) | |
1339 | { | |
1340 | struct nexthop *nexthop = NULL; | |
1341 | int nh_active = 0; | |
5f7a4718 | 1342 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
d62a17ae | 1343 | |
1344 | /* | |
1345 | * We have to install or update if a new route has been selected or | |
1346 | * something has changed. | |
1347 | */ | |
1348 | if (new != old || CHECK_FLAG(new->status, ROUTE_ENTRY_CHANGED)) { | |
1349 | hook_call(rib_update, rn, "updating existing route"); | |
1350 | ||
1351 | /* Update the nexthop; we could determine here that nexthop is | |
1352 | * inactive. */ | |
1353 | if (nexthop_active_update(rn, new, 1)) | |
1354 | nh_active = 1; | |
1355 | ||
1356 | /* If nexthop is active, install the selected route, if | |
1357 | * appropriate. If | |
1358 | * the install succeeds, cleanup flags for prior route, if | |
1359 | * different from | |
1360 | * newly selected. | |
1361 | */ | |
1362 | if (nh_active) { | |
1363 | if (IS_ZEBRA_DEBUG_RIB) { | |
1364 | char buf[SRCDEST2STR_BUFFER]; | |
1365 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1366 | if (new != old) | |
1367 | zlog_debug( | |
1368 | "%u:%s: Updating route rn %p, re %p (type %d) " | |
1369 | "old %p (type %d)", | |
1370 | zvrf_id(zvrf), buf, rn, new, | |
1371 | new->type, old, old->type); | |
1372 | else | |
1373 | zlog_debug( | |
1374 | "%u:%s: Updating route rn %p, re %p (type %d)", | |
1375 | zvrf_id(zvrf), buf, rn, new, | |
1376 | new->type); | |
1377 | } | |
1378 | ||
1379 | /* If labeled-unicast route, uninstall transit LSP. */ | |
1380 | if (zebra_rib_labeled_unicast(old)) | |
1381 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
1382 | ||
1383 | /* Non-system route should be installed. */ | |
1384 | if (!RIB_SYSTEM_ROUTE(new)) { | |
1385 | /* If labeled-unicast route, install transit | |
1386 | * LSP. */ | |
1387 | if (zebra_rib_labeled_unicast(new)) | |
1388 | zebra_mpls_lsp_install(zvrf, rn, new); | |
1389 | ||
0c555cc6 | 1390 | rib_install_kernel(rn, new, old); |
ed216282 DS |
1391 | } else { |
1392 | /* | |
1393 | * We do not need to install the | |
1394 | * selected route because it | |
1395 | * is already isntalled by | |
1396 | * the system( ie not us ) | |
1397 | * so just mark it as winning | |
1398 | * we do need to ensure that | |
1399 | * if we uninstall a route | |
1400 | * from ourselves we don't | |
1401 | * over write this pointer | |
1402 | */ | |
1403 | dest->selected_fib = NULL; | |
d62a17ae | 1404 | } |
d62a17ae | 1405 | /* If install succeeded or system route, cleanup flags |
1406 | * for prior route. */ | |
ed216282 | 1407 | if (new != old) { |
d62a17ae | 1408 | if (RIB_SYSTEM_ROUTE(new)) { |
1409 | if (!RIB_SYSTEM_ROUTE(old)) | |
1410 | rib_uninstall_kernel(rn, old); | |
1411 | } else { | |
7ee30f28 | 1412 | for (nexthop = old->ng.nexthop; nexthop; |
d62a17ae | 1413 | nexthop = nexthop->next) |
1414 | UNSET_FLAG(nexthop->flags, | |
1415 | NEXTHOP_FLAG_FIB); | |
1416 | } | |
1417 | } | |
d62a17ae | 1418 | } |
a64448ba | 1419 | |
d62a17ae | 1420 | /* |
1421 | * If nexthop for selected route is not active or install | |
1422 | * failed, we | |
1423 | * may need to uninstall and delete for redistribution. | |
1424 | */ | |
ed216282 | 1425 | if (!nh_active) { |
d62a17ae | 1426 | if (IS_ZEBRA_DEBUG_RIB) { |
1427 | char buf[SRCDEST2STR_BUFFER]; | |
1428 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1429 | if (new != old) | |
1430 | zlog_debug( | |
1431 | "%u:%s: Deleting route rn %p, re %p (type %d) " | |
0cfbff74 | 1432 | "old %p (type %d) - nexthop inactive", |
d62a17ae | 1433 | zvrf_id(zvrf), buf, rn, new, |
0cfbff74 | 1434 | new->type, old, old->type); |
d62a17ae | 1435 | else |
1436 | zlog_debug( | |
0cfbff74 | 1437 | "%u:%s: Deleting route rn %p, re %p (type %d) - nexthop inactive", |
d62a17ae | 1438 | zvrf_id(zvrf), buf, rn, new, |
0cfbff74 | 1439 | new->type); |
d62a17ae | 1440 | } |
1441 | ||
1442 | /* If labeled-unicast route, uninstall transit LSP. */ | |
1443 | if (zebra_rib_labeled_unicast(old)) | |
1444 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
1445 | ||
1446 | if (!RIB_SYSTEM_ROUTE(old)) | |
1447 | rib_uninstall_kernel(rn, old); | |
ed216282 DS |
1448 | else |
1449 | dest->selected_fib = NULL; | |
d62a17ae | 1450 | } |
1451 | } else { | |
1452 | /* | |
1453 | * Same route selected; check if in the FIB and if not, | |
1454 | * re-install. This | |
1455 | * is housekeeping code to deal with race conditions in kernel | |
1456 | * with linux | |
1457 | * netlink reporting interface up before IPv4 or IPv6 protocol | |
1458 | * is ready | |
1459 | * to add routes. | |
1460 | */ | |
1461 | if (!RIB_SYSTEM_ROUTE(new)) { | |
ed216282 | 1462 | bool in_fib = false; |
d62a17ae | 1463 | |
7ee30f28 | 1464 | for (ALL_NEXTHOPS(new->ng, nexthop)) |
d62a17ae | 1465 | if (CHECK_FLAG(nexthop->flags, |
1466 | NEXTHOP_FLAG_FIB)) { | |
ed216282 | 1467 | in_fib = true; |
d62a17ae | 1468 | break; |
1469 | } | |
1470 | if (!in_fib) | |
1471 | rib_install_kernel(rn, new, NULL); | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | /* Update prior route. */ | |
1476 | if (new != old) { | |
d62a17ae | 1477 | /* Set real nexthop. */ |
1478 | nexthop_active_update(rn, old, 1); | |
1479 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); | |
1480 | } | |
3e5c6e00 | 1481 | |
d62a17ae | 1482 | /* Clear changed flag. */ |
1483 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); | |
3e5c6e00 | 1484 | } |
1485 | ||
d62a17ae | 1486 | /* Check if 'alternate' RIB entry is better than 'current'. */ |
1487 | static struct route_entry *rib_choose_best(struct route_entry *current, | |
1488 | struct route_entry *alternate) | |
1489 | { | |
1490 | if (current == NULL) | |
1491 | return alternate; | |
1492 | ||
1493 | /* filter route selection in following order: | |
1494 | * - connected beats other types | |
1495 | * - lower distance beats higher | |
1496 | * - lower metric beats higher for equal distance | |
1497 | * - last, hence oldest, route wins tie break. | |
1498 | */ | |
1499 | ||
1500 | /* Connected routes. Pick the last connected | |
1501 | * route of the set of lowest metric connected routes. | |
1502 | */ | |
1503 | if (alternate->type == ZEBRA_ROUTE_CONNECT) { | |
1504 | if (current->type != ZEBRA_ROUTE_CONNECT | |
1505 | || alternate->metric <= current->metric) | |
1506 | return alternate; | |
1507 | ||
1508 | return current; | |
1509 | } | |
3e5c6e00 | 1510 | |
d62a17ae | 1511 | if (current->type == ZEBRA_ROUTE_CONNECT) |
1512 | return current; | |
3e5c6e00 | 1513 | |
d62a17ae | 1514 | /* higher distance loses */ |
1515 | if (alternate->distance < current->distance) | |
1516 | return alternate; | |
1517 | if (current->distance < alternate->distance) | |
1518 | return current; | |
3e5c6e00 | 1519 | |
d62a17ae | 1520 | /* metric tie-breaks equal distance */ |
1521 | if (alternate->metric <= current->metric) | |
1522 | return alternate; | |
3e5c6e00 | 1523 | |
d62a17ae | 1524 | return current; |
3e5c6e00 | 1525 | } |
1526 | ||
d62a17ae | 1527 | /* Core function for processing routing information base. */ |
1528 | static void rib_process(struct route_node *rn) | |
1529 | { | |
1530 | struct route_entry *re; | |
1531 | struct route_entry *next; | |
1532 | struct route_entry *old_selected = NULL; | |
1533 | struct route_entry *new_selected = NULL; | |
1534 | struct route_entry *old_fib = NULL; | |
1535 | struct route_entry *new_fib = NULL; | |
1536 | struct route_entry *best = NULL; | |
1537 | char buf[SRCDEST2STR_BUFFER]; | |
1538 | rib_dest_t *dest; | |
1539 | struct zebra_vrf *zvrf = NULL; | |
86391e56 MS |
1540 | const struct prefix *p, *src_p; |
1541 | ||
d62a17ae | 1542 | srcdest_rnode_prefixes(rn, &p, &src_p); |
1543 | vrf_id_t vrf_id = VRF_UNKNOWN; | |
1544 | ||
1545 | assert(rn); | |
1546 | ||
1547 | dest = rib_dest_from_rnode(rn); | |
1548 | if (dest) { | |
1549 | zvrf = rib_dest_vrf(dest); | |
1550 | vrf_id = zvrf_id(zvrf); | |
1551 | } | |
bab85d4f | 1552 | |
d62a17ae | 1553 | if (IS_ZEBRA_DEBUG_RIB) |
1554 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bab85d4f | 1555 | |
d62a17ae | 1556 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1557 | zlog_debug("%u:%s: Processing rn %p", vrf_id, buf, rn); | |
bab85d4f | 1558 | |
607425e5 DS |
1559 | /* |
1560 | * we can have rn's that have a NULL info pointer | |
1561 | * (dest). As such let's not let the deref happen | |
1562 | * additionally we know RNODE_FOREACH_RE_SAFE | |
1563 | * will not iterate so we are ok. | |
1564 | */ | |
1565 | if (dest) | |
1566 | old_fib = dest->selected_fib; | |
5f7a4718 | 1567 | |
a2addae8 | 1568 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 1569 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1570 | zlog_debug( | |
1571 | "%u:%s: Examine re %p (type %d) status %x flags %x " | |
1572 | "dist %d metric %d", | |
1573 | vrf_id, buf, re, re->type, re->status, | |
1574 | re->flags, re->distance, re->metric); | |
1575 | ||
1576 | UNSET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
1577 | ||
1578 | /* Currently selected re. */ | |
1579 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { | |
1580 | assert(old_selected == NULL); | |
1581 | old_selected = re; | |
1582 | } | |
bab85d4f | 1583 | |
d62a17ae | 1584 | /* Skip deleted entries from selection */ |
1585 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
1586 | continue; | |
1587 | ||
1588 | /* Skip unreachable nexthop. */ | |
1589 | /* This first call to nexthop_active_update is merely to | |
1590 | * determine if | |
1591 | * there's any change to nexthops associated with this RIB | |
1592 | * entry. Now, | |
1593 | * rib_process() can be invoked due to an external event such as | |
1594 | * link | |
1595 | * down or due to next-hop-tracking evaluation. In the latter | |
1596 | * case, | |
1597 | * a decision has already been made that the NHs have changed. | |
1598 | * So, no | |
1599 | * need to invoke a potentially expensive call again. Further, | |
1600 | * since | |
1601 | * the change might be in a recursive NH which is not caught in | |
1602 | * the nexthop_active_update() code. Thus, we might miss changes | |
1603 | * to | |
1604 | * recursive NHs. | |
1605 | */ | |
1606 | if (!CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED) | |
1607 | && !nexthop_active_update(rn, re, 0)) { | |
1608 | if (re->type == ZEBRA_ROUTE_TABLE) { | |
1609 | /* XXX: HERE BE DRAGONS!!!!! | |
1610 | * In all honesty, I have not yet figured out | |
1611 | * what this part | |
1612 | * does or why the ROUTE_ENTRY_CHANGED test | |
1613 | * above is correct | |
1614 | * or why we need to delete a route here, and | |
1615 | * also not whether | |
1616 | * this concerns both selected and fib route, or | |
1617 | * only selected | |
1618 | * or only fib */ | |
1619 | /* This entry was denied by the 'ip protocol | |
1620 | * table' route-map, we | |
1621 | * need to delete it */ | |
1622 | if (re != old_selected) { | |
1623 | if (IS_ZEBRA_DEBUG_RIB) | |
1624 | zlog_debug( | |
32391aff | 1625 | "%s: %u:%s: imported via import-table but denied " |
d62a17ae | 1626 | "by the ip protocol table route-map", |
32391aff | 1627 | __func__, vrf_id, buf); |
d62a17ae | 1628 | rib_unlink(rn, re); |
1629 | } else | |
1630 | SET_FLAG(re->status, | |
1631 | ROUTE_ENTRY_REMOVED); | |
1632 | } | |
1633 | ||
1634 | continue; | |
1635 | } | |
bab85d4f | 1636 | |
d62a17ae | 1637 | /* Infinite distance. */ |
1638 | if (re->distance == DISTANCE_INFINITY) { | |
1639 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
1640 | continue; | |
1641 | } | |
bab85d4f | 1642 | |
d62a17ae | 1643 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_FIB_OVERRIDE)) { |
1644 | best = rib_choose_best(new_fib, re); | |
1645 | if (new_fib && best != new_fib) | |
1646 | UNSET_FLAG(new_fib->status, | |
1647 | ROUTE_ENTRY_CHANGED); | |
1648 | new_fib = best; | |
1649 | } else { | |
1650 | best = rib_choose_best(new_selected, re); | |
1651 | if (new_selected && best != new_selected) | |
1652 | UNSET_FLAG(new_selected->status, | |
1653 | ROUTE_ENTRY_CHANGED); | |
1654 | new_selected = best; | |
1655 | } | |
1656 | if (best != re) | |
1657 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
1658 | } /* RNODE_FOREACH_RE */ | |
1659 | ||
1660 | /* If no FIB override route, use the selected route also for FIB */ | |
1661 | if (new_fib == NULL) | |
1662 | new_fib = new_selected; | |
1663 | ||
1664 | /* After the cycle is finished, the following pointers will be set: | |
1665 | * old_selected --- RE entry currently having SELECTED | |
1666 | * new_selected --- RE entry that is newly SELECTED | |
1667 | * old_fib --- RE entry currently in kernel FIB | |
1668 | * new_fib --- RE entry that is newly to be in kernel FIB | |
1669 | * | |
1670 | * new_selected will get SELECTED flag, and is going to be redistributed | |
1671 | * the zclients. new_fib (which can be new_selected) will be installed | |
1672 | * in kernel. | |
1673 | */ | |
1674 | ||
1675 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { | |
1676 | zlog_debug( | |
1677 | "%u:%s: After processing: old_selected %p new_selected %p old_fib %p new_fib %p", | |
1678 | vrf_id, buf, (void *)old_selected, (void *)new_selected, | |
1679 | (void *)old_fib, (void *)new_fib); | |
1680 | } | |
446bb95e | 1681 | |
d62a17ae | 1682 | /* Buffer ROUTE_ENTRY_CHANGED here, because it will get cleared if |
1683 | * fib == selected */ | |
9d303b37 DL |
1684 | bool selected_changed = new_selected && CHECK_FLAG(new_selected->status, |
1685 | ROUTE_ENTRY_CHANGED); | |
d62a17ae | 1686 | |
1687 | /* Update fib according to selection results */ | |
1688 | if (new_fib && old_fib) | |
1689 | rib_process_update_fib(zvrf, rn, old_fib, new_fib); | |
1690 | else if (new_fib) | |
1691 | rib_process_add_fib(zvrf, rn, new_fib); | |
1692 | else if (old_fib) | |
1693 | rib_process_del_fib(zvrf, rn, old_fib); | |
1694 | ||
1695 | /* Redistribute SELECTED entry */ | |
1696 | if (old_selected != new_selected || selected_changed) { | |
7ee30f28 | 1697 | struct nexthop *nexthop = NULL; |
d62a17ae | 1698 | |
1699 | /* Check if we have a FIB route for the destination, otherwise, | |
1700 | * don't redistribute it */ | |
7ee30f28 DS |
1701 | if (new_fib) { |
1702 | for (ALL_NEXTHOPS(new_fib->ng, nexthop)) { | |
1703 | if (CHECK_FLAG(nexthop->flags, | |
1704 | NEXTHOP_FLAG_FIB)) { | |
1705 | break; | |
1706 | } | |
d62a17ae | 1707 | } |
1708 | } | |
1709 | if (!nexthop) | |
1710 | new_selected = NULL; | |
93bdadae | 1711 | |
d62a17ae | 1712 | if (new_selected && new_selected != new_fib) { |
1713 | nexthop_active_update(rn, new_selected, 1); | |
1714 | UNSET_FLAG(new_selected->status, ROUTE_ENTRY_CHANGED); | |
1715 | } | |
41ec9222 | 1716 | |
d62a17ae | 1717 | if (old_selected) { |
1718 | if (!new_selected) | |
1719 | redistribute_delete(p, src_p, old_selected); | |
1720 | if (old_selected != new_selected) | |
1721 | UNSET_FLAG(old_selected->flags, | |
1722 | ZEBRA_FLAG_SELECTED); | |
f857321e | 1723 | } |
446bb95e | 1724 | |
d62a17ae | 1725 | if (new_selected) { |
1726 | /* Install new or replace existing redistributed entry | |
1727 | */ | |
1728 | SET_FLAG(new_selected->flags, ZEBRA_FLAG_SELECTED); | |
1729 | redistribute_update(p, src_p, new_selected, | |
1730 | old_selected); | |
1731 | } | |
1732 | } | |
3e5c6e00 | 1733 | |
d62a17ae | 1734 | /* Remove all RE entries queued for removal */ |
a2addae8 | 1735 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 1736 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { |
1737 | if (IS_ZEBRA_DEBUG_RIB) { | |
1738 | rnode_debug(rn, vrf_id, "rn %p, removing re %p", | |
1739 | (void *)rn, (void *)re); | |
1740 | } | |
1741 | rib_unlink(rn, re); | |
1742 | } | |
1743 | } | |
4d38fdb4 | 1744 | |
d62a17ae | 1745 | /* |
1746 | * Check if the dest can be deleted now. | |
1747 | */ | |
1748 | rib_gc_dest(rn); | |
e96f9203 DO |
1749 | } |
1750 | ||
5110a0c6 | 1751 | /* Take a list of route_node structs and return 1, if there was a record |
d62a17ae | 1752 | * picked from it and processed by rib_process(). Don't process more, |
5110a0c6 | 1753 | * than one RN record; operate only in the specified sub-queue. |
e96f9203 | 1754 | */ |
d7c0a89a | 1755 | static unsigned int process_subq(struct list *subq, uint8_t qindex) |
e96f9203 | 1756 | { |
d62a17ae | 1757 | struct listnode *lnode = listhead(subq); |
1758 | struct route_node *rnode; | |
1759 | rib_dest_t *dest; | |
1760 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 | 1761 | |
d62a17ae | 1762 | if (!lnode) |
1763 | return 0; | |
5110a0c6 | 1764 | |
d62a17ae | 1765 | rnode = listgetdata(lnode); |
1766 | dest = rib_dest_from_rnode(rnode); | |
1767 | if (dest) | |
1768 | zvrf = rib_dest_vrf(dest); | |
41ec9222 | 1769 | |
d62a17ae | 1770 | rib_process(rnode); |
5110a0c6 | 1771 | |
d62a17ae | 1772 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { |
1773 | char buf[SRCDEST2STR_BUFFER]; | |
1774 | srcdest_rnode2str(rnode, buf, sizeof(buf)); | |
1775 | zlog_debug("%u:%s: rn %p dequeued from sub-queue %u", | |
1776 | zvrf ? zvrf_id(zvrf) : 0, buf, rnode, qindex); | |
1777 | } | |
41ec9222 | 1778 | |
d62a17ae | 1779 | if (rnode->info) |
1780 | UNSET_FLAG(rib_dest_from_rnode(rnode)->flags, | |
1781 | RIB_ROUTE_QUEUED(qindex)); | |
9fd92e3c | 1782 | |
67b9467f | 1783 | #if 0 |
5110a0c6 SH |
1784 | else |
1785 | { | |
1786 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
1787 | __func__, rnode, rnode->lock); | |
1788 | zlog_backtrace(LOG_DEBUG); | |
1789 | } | |
67b9467f | 1790 | #endif |
d62a17ae | 1791 | route_unlock_node(rnode); |
1792 | list_delete_node(subq, lnode); | |
1793 | return 1; | |
e96f9203 DO |
1794 | } |
1795 | ||
fb018d25 DS |
1796 | /* |
1797 | * All meta queues have been processed. Trigger next-hop evaluation. | |
1798 | */ | |
d62a17ae | 1799 | static void meta_queue_process_complete(struct work_queue *dummy) |
fb018d25 | 1800 | { |
d62a17ae | 1801 | struct vrf *vrf; |
1802 | struct zebra_vrf *zvrf; | |
9ec6b0bb | 1803 | |
d62a17ae | 1804 | /* Evaluate nexthops for those VRFs which underwent route processing. |
1805 | * This | |
1806 | * should limit the evaluation to the necessary VRFs in most common | |
1807 | * situations. | |
1808 | */ | |
a2addae8 | 1809 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
d62a17ae | 1810 | zvrf = vrf->info; |
1811 | if (zvrf == NULL || !(zvrf->flags & ZEBRA_VRF_RIB_SCHEDULED)) | |
1812 | continue; | |
1813 | ||
1814 | zvrf->flags &= ~ZEBRA_VRF_RIB_SCHEDULED; | |
1815 | zebra_evaluate_rnh(zvrf_id(zvrf), AF_INET, 0, RNH_NEXTHOP_TYPE, | |
1816 | NULL); | |
1817 | zebra_evaluate_rnh(zvrf_id(zvrf), AF_INET, 0, | |
1818 | RNH_IMPORT_CHECK_TYPE, NULL); | |
1819 | zebra_evaluate_rnh(zvrf_id(zvrf), AF_INET6, 0, RNH_NEXTHOP_TYPE, | |
1820 | NULL); | |
1821 | zebra_evaluate_rnh(zvrf_id(zvrf), AF_INET6, 0, | |
1822 | RNH_IMPORT_CHECK_TYPE, NULL); | |
1823 | } | |
939fba27 | 1824 | |
d62a17ae | 1825 | /* Schedule LSPs for processing, if needed. */ |
1826 | zvrf = vrf_info_lookup(VRF_DEFAULT); | |
1827 | if (mpls_should_lsps_be_processed(zvrf)) { | |
1828 | if (IS_ZEBRA_DEBUG_MPLS) | |
1829 | zlog_debug( | |
1830 | "%u: Scheduling all LSPs upon RIB completion", | |
1831 | zvrf_id(zvrf)); | |
1832 | zebra_mpls_lsp_schedule(zvrf); | |
1833 | mpls_unmark_lsps_for_processing(zvrf); | |
1834 | } | |
fb018d25 DS |
1835 | } |
1836 | ||
e96f9203 | 1837 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
d62a17ae | 1838 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and |
1839 | * data | |
e96f9203 DO |
1840 | * is pointed to the meta queue structure. |
1841 | */ | |
d62a17ae | 1842 | static wq_item_status meta_queue_process(struct work_queue *dummy, void *data) |
e96f9203 | 1843 | { |
d62a17ae | 1844 | struct meta_queue *mq = data; |
1845 | unsigned i; | |
5110a0c6 | 1846 | |
d62a17ae | 1847 | for (i = 0; i < MQ_SIZE; i++) |
1848 | if (process_subq(mq->subq[i], i)) { | |
1849 | mq->size--; | |
1850 | break; | |
1851 | } | |
1852 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; | |
e96f9203 DO |
1853 | } |
1854 | ||
9fd92e3c AS |
1855 | /* |
1856 | * Map from rib types to queue type (priority) in meta queue | |
1857 | */ | |
d7c0a89a QY |
1858 | static const uint8_t meta_queue_map[ZEBRA_ROUTE_MAX] = { |
1859 | [ZEBRA_ROUTE_SYSTEM] = 4, | |
1860 | [ZEBRA_ROUTE_KERNEL] = 0, | |
1861 | [ZEBRA_ROUTE_CONNECT] = 0, | |
1862 | [ZEBRA_ROUTE_STATIC] = 1, | |
1863 | [ZEBRA_ROUTE_RIP] = 2, | |
1864 | [ZEBRA_ROUTE_RIPNG] = 2, | |
1865 | [ZEBRA_ROUTE_OSPF] = 2, | |
1866 | [ZEBRA_ROUTE_OSPF6] = 2, | |
1867 | [ZEBRA_ROUTE_ISIS] = 2, | |
1868 | [ZEBRA_ROUTE_BGP] = 3, | |
1869 | [ZEBRA_ROUTE_PIM] = 4, // Shouldn't happen but for safety | |
1870 | [ZEBRA_ROUTE_EIGRP] = 2, | |
1871 | [ZEBRA_ROUTE_NHRP] = 2, | |
1872 | [ZEBRA_ROUTE_HSLS] = 4, | |
1873 | [ZEBRA_ROUTE_OLSR] = 4, | |
1874 | [ZEBRA_ROUTE_TABLE] = 1, | |
1875 | [ZEBRA_ROUTE_LDP] = 4, | |
1876 | [ZEBRA_ROUTE_VNC] = 3, | |
1877 | [ZEBRA_ROUTE_VNC_DIRECT] = 3, | |
1878 | [ZEBRA_ROUTE_VNC_DIRECT_RH] = 3, | |
1879 | [ZEBRA_ROUTE_BGP_DIRECT] = 3, | |
1880 | [ZEBRA_ROUTE_BGP_DIRECT_EXT] = 3, | |
1881 | [ZEBRA_ROUTE_BABEL] = 2, | |
1882 | [ZEBRA_ROUTE_ALL] = 4, // Shouldn't happen but for safety | |
5110a0c6 SH |
1883 | }; |
1884 | ||
1885 | /* Look into the RN and queue it into one or more priority queues, | |
1886 | * increasing the size for each data push done. | |
e96f9203 | 1887 | */ |
d62a17ae | 1888 | static void rib_meta_queue_add(struct meta_queue *mq, struct route_node *rn) |
e96f9203 | 1889 | { |
d62a17ae | 1890 | struct route_entry *re; |
5110a0c6 | 1891 | |
a2addae8 | 1892 | RNODE_FOREACH_RE (rn, re) { |
d7c0a89a | 1893 | uint8_t qindex = meta_queue_map[re->type]; |
d62a17ae | 1894 | struct zebra_vrf *zvrf; |
1895 | ||
1896 | /* Invariant: at this point we always have rn->info set. */ | |
1897 | if (CHECK_FLAG(rib_dest_from_rnode(rn)->flags, | |
1898 | RIB_ROUTE_QUEUED(qindex))) { | |
1899 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
1900 | rnode_debug( | |
1901 | rn, re->vrf_id, | |
1902 | "rn %p is already queued in sub-queue %u", | |
1903 | (void *)rn, qindex); | |
1904 | continue; | |
1905 | } | |
5110a0c6 | 1906 | |
d62a17ae | 1907 | SET_FLAG(rib_dest_from_rnode(rn)->flags, |
1908 | RIB_ROUTE_QUEUED(qindex)); | |
1909 | listnode_add(mq->subq[qindex], rn); | |
1910 | route_lock_node(rn); | |
1911 | mq->size++; | |
5110a0c6 | 1912 | |
d62a17ae | 1913 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1914 | rnode_debug(rn, re->vrf_id, | |
1915 | "queued rn %p into sub-queue %u", | |
1916 | (void *)rn, qindex); | |
9ec6b0bb | 1917 | |
d62a17ae | 1918 | zvrf = zebra_vrf_lookup_by_id(re->vrf_id); |
1919 | if (zvrf) | |
1920 | zvrf->flags |= ZEBRA_VRF_RIB_SCHEDULED; | |
1921 | } | |
4d38fdb4 | 1922 | } |
1923 | ||
6d691129 | 1924 | /* Add route_node to work queue and schedule processing */ |
d62a17ae | 1925 | void rib_queue_add(struct route_node *rn) |
4d38fdb4 | 1926 | { |
d62a17ae | 1927 | assert(rn); |
fc328ac9 | 1928 | |
d62a17ae | 1929 | /* Pointless to queue a route_node with no RIB entries to add or remove |
1930 | */ | |
1931 | if (!rnode_to_ribs(rn)) { | |
1932 | zlog_debug("%s: called for route_node (%p, %d) with no ribs", | |
1933 | __func__, (void *)rn, rn->lock); | |
1934 | zlog_backtrace(LOG_DEBUG); | |
1935 | return; | |
1936 | } | |
4d38fdb4 | 1937 | |
d62a17ae | 1938 | if (zebrad.ribq == NULL) { |
1939 | zlog_err("%s: work_queue does not exist!", __func__); | |
1940 | return; | |
1941 | } | |
1942 | ||
1943 | /* | |
1944 | * The RIB queue should normally be either empty or holding the only | |
1945 | * work_queue_item element. In the latter case this element would | |
1946 | * hold a pointer to the meta queue structure, which must be used to | |
1947 | * actually queue the route nodes to process. So create the MQ | |
1948 | * holder, if necessary, then push the work into it in any case. | |
1949 | * This semantics was introduced after 0.99.9 release. | |
1950 | */ | |
f104f6c1 | 1951 | if (work_queue_empty(zebrad.ribq)) |
d62a17ae | 1952 | work_queue_add(zebrad.ribq, zebrad.mq); |
e96f9203 | 1953 | |
d62a17ae | 1954 | rib_meta_queue_add(zebrad.mq, rn); |
fc328ac9 | 1955 | |
d62a17ae | 1956 | return; |
4d38fdb4 | 1957 | } |
1958 | ||
5110a0c6 SH |
1959 | /* Create new meta queue. |
1960 | A destructor function doesn't seem to be necessary here. | |
1961 | */ | |
d62a17ae | 1962 | static struct meta_queue *meta_queue_new(void) |
e96f9203 | 1963 | { |
d62a17ae | 1964 | struct meta_queue *new; |
1965 | unsigned i; | |
5110a0c6 | 1966 | |
d62a17ae | 1967 | new = XCALLOC(MTYPE_WORK_QUEUE, sizeof(struct meta_queue)); |
1968 | assert(new); | |
e96f9203 | 1969 | |
d62a17ae | 1970 | for (i = 0; i < MQ_SIZE; i++) { |
1971 | new->subq[i] = list_new(); | |
1972 | assert(new->subq[i]); | |
1973 | } | |
5110a0c6 | 1974 | |
d62a17ae | 1975 | return new; |
e96f9203 DO |
1976 | } |
1977 | ||
d62a17ae | 1978 | void meta_queue_free(struct meta_queue *mq) |
5a8dfcd8 | 1979 | { |
d62a17ae | 1980 | unsigned i; |
5a8dfcd8 | 1981 | |
d62a17ae | 1982 | for (i = 0; i < MQ_SIZE; i++) |
affe9e99 | 1983 | list_delete_and_null(&mq->subq[i]); |
5a8dfcd8 | 1984 | |
d62a17ae | 1985 | XFREE(MTYPE_WORK_QUEUE, mq); |
5a8dfcd8 RW |
1986 | } |
1987 | ||
4d38fdb4 | 1988 | /* initialise zebra rib work queue */ |
d62a17ae | 1989 | static void rib_queue_init(struct zebra_t *zebra) |
4d38fdb4 | 1990 | { |
d62a17ae | 1991 | assert(zebra); |
1992 | ||
1993 | if (!(zebra->ribq = | |
1994 | work_queue_new(zebra->master, "route_node processing"))) { | |
1995 | zlog_err("%s: could not initialise work queue!", __func__); | |
1996 | return; | |
1997 | } | |
4d38fdb4 | 1998 | |
d62a17ae | 1999 | /* fill in the work queue spec */ |
2000 | zebra->ribq->spec.workfunc = &meta_queue_process; | |
2001 | zebra->ribq->spec.errorfunc = NULL; | |
2002 | zebra->ribq->spec.completion_func = &meta_queue_process_complete; | |
2003 | /* XXX: TODO: These should be runtime configurable via vty */ | |
2004 | zebra->ribq->spec.max_retries = 3; | |
3a30f50f | 2005 | zebra->ribq->spec.hold = ZEBRA_RIB_PROCESS_HOLD_TIME; |
d62a17ae | 2006 | |
2007 | if (!(zebra->mq = meta_queue_new())) { | |
2008 | zlog_err("%s: could not initialise meta queue!", __func__); | |
2009 | return; | |
2010 | } | |
2011 | return; | |
718e3744 | 2012 | } |
2013 | ||
6d691129 PJ |
2014 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2015 | * | |
2016 | * The queue length is bounded by the maximal size of the routing table, | |
2017 | * as a route_node will not be requeued, if already queued. | |
2018 | * | |
f0f77c9a DS |
2019 | * REs are submitted via rib_addnode or rib_delnode which set minimal |
2020 | * state, or static_install_route (when an existing RE is updated) | |
3c0755dc | 2021 | * and then submit route_node to queue for best-path selection later. |
f0f77c9a | 2022 | * Order of add/delete state changes are preserved for any given RE. |
6d691129 | 2023 | * |
f0f77c9a | 2024 | * Deleted REs are reaped during best-path selection. |
6d691129 PJ |
2025 | * |
2026 | * rib_addnode | |
f0f77c9a DS |
2027 | * |-> rib_link or unset ROUTE_ENTRY_REMOVE |->Update kernel with |
2028 | * |-------->| | best RE, if required | |
3c0755dc PJ |
2029 | * | | |
2030 | * static_install->|->rib_addqueue...... -> rib_process | |
2031 | * | | | |
2032 | * |-------->| |-> rib_unlink | |
f0f77c9a DS |
2033 | * |-> set ROUTE_ENTRY_REMOVE | |
2034 | * rib_delnode (RE freed) | |
6d691129 | 2035 | * |
9fd92e3c AS |
2036 | * The 'info' pointer of a route_node points to a rib_dest_t |
2037 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2038 | * dest is created on-demand by rib_link() and is kept around at least | |
2039 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
d62a17ae | 2040 | * |
6d691129 PJ |
2041 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): |
2042 | * | |
2043 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2044 | * - dest attached to route_node: |
2045 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2046 | * - route_node processing queue |
2047 | * - managed by: rib_addqueue, rib_process. | |
2048 | * | |
2049 | */ | |
d62a17ae | 2050 | |
f0f77c9a | 2051 | /* Add RE to head of the route node. */ |
d62a17ae | 2052 | static void rib_link(struct route_node *rn, struct route_entry *re, int process) |
2053 | { | |
2054 | struct route_entry *head; | |
2055 | rib_dest_t *dest; | |
2056 | afi_t afi; | |
2057 | const char *rmap_name; | |
9fd92e3c | 2058 | |
d62a17ae | 2059 | assert(re && rn); |
9fd92e3c | 2060 | |
d62a17ae | 2061 | dest = rib_dest_from_rnode(rn); |
2062 | if (!dest) { | |
2063 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2064 | rnode_debug(rn, re->vrf_id, "rn %p adding dest", rn); | |
7a4bb9c5 | 2065 | |
d62a17ae | 2066 | dest = XCALLOC(MTYPE_RIB_DEST, sizeof(rib_dest_t)); |
2067 | route_lock_node(rn); /* rn route table reference */ | |
2068 | rn->info = dest; | |
2069 | dest->rnode = rn; | |
2070 | } | |
2263a412 | 2071 | |
d62a17ae | 2072 | head = dest->routes; |
2073 | if (head) { | |
2074 | head->prev = re; | |
2075 | } | |
2076 | re->next = head; | |
2077 | dest->routes = re; | |
2078 | ||
2079 | afi = (rn->p.family == AF_INET) | |
2080 | ? AFI_IP | |
2081 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2082 | if (is_zebra_import_table_enabled(afi, re->table)) { | |
2083 | rmap_name = zebra_get_import_table_route_map(afi, re->table); | |
2084 | zebra_add_import_table_entry(rn, re, rmap_name); | |
2085 | } else if (process) | |
2086 | rib_queue_add(rn); | |
2087 | } | |
2088 | ||
7e24fdf3 DS |
2089 | static void rib_addnode(struct route_node *rn, |
2090 | struct route_entry *re, int process) | |
d62a17ae | 2091 | { |
2092 | /* RE node has been un-removed before route-node is processed. | |
2093 | * route_node must hence already be on the queue for processing.. | |
2094 | */ | |
2095 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
2096 | if (IS_ZEBRA_DEBUG_RIB) | |
2097 | rnode_debug(rn, re->vrf_id, "rn %p, un-removed re %p", | |
2098 | (void *)rn, (void *)re); | |
2099 | ||
2100 | UNSET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2101 | return; | |
2102 | } | |
2103 | rib_link(rn, re, process); | |
6d691129 PJ |
2104 | } |
2105 | ||
9fd92e3c AS |
2106 | /* |
2107 | * rib_unlink | |
2108 | * | |
2109 | * Detach a rib structure from a route_node. | |
2110 | * | |
2111 | * Note that a call to rib_unlink() should be followed by a call to | |
2112 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2113 | * longer required to be deleted. | |
2114 | */ | |
d62a17ae | 2115 | void rib_unlink(struct route_node *rn, struct route_entry *re) |
6d691129 | 2116 | { |
d62a17ae | 2117 | rib_dest_t *dest; |
9fd92e3c | 2118 | |
d62a17ae | 2119 | assert(rn && re); |
6d691129 | 2120 | |
d62a17ae | 2121 | if (IS_ZEBRA_DEBUG_RIB) |
2122 | rnode_debug(rn, re->vrf_id, "rn %p, re %p", (void *)rn, | |
2123 | (void *)re); | |
6d691129 | 2124 | |
d62a17ae | 2125 | dest = rib_dest_from_rnode(rn); |
6d691129 | 2126 | |
d62a17ae | 2127 | if (re->next) |
2128 | re->next->prev = re->prev; | |
6d691129 | 2129 | |
d62a17ae | 2130 | if (re->prev) |
2131 | re->prev->next = re->next; | |
2132 | else { | |
2133 | dest->routes = re->next; | |
2134 | } | |
7a4bb9c5 | 2135 | |
2eb07de3 DS |
2136 | if (dest->selected_fib == re) |
2137 | dest->selected_fib = NULL; | |
2138 | ||
7ee30f28 | 2139 | nexthops_free(re->ng.nexthop); |
d62a17ae | 2140 | XFREE(MTYPE_RE, re); |
2141 | } | |
2142 | ||
2143 | void rib_delnode(struct route_node *rn, struct route_entry *re) | |
2144 | { | |
2145 | afi_t afi; | |
2146 | ||
2147 | if (IS_ZEBRA_DEBUG_RIB) | |
2148 | rnode_debug(rn, re->vrf_id, "rn %p, re %p, removing", | |
2149 | (void *)rn, (void *)re); | |
2150 | SET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2151 | ||
2152 | afi = (rn->p.family == AF_INET) | |
2153 | ? AFI_IP | |
2154 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2155 | if (is_zebra_import_table_enabled(afi, re->table)) { | |
2156 | zebra_del_import_table_entry(rn, re); | |
2157 | /* Just clean up if non main table */ | |
2158 | if (IS_ZEBRA_DEBUG_RIB) { | |
2159 | char buf[SRCDEST2STR_BUFFER]; | |
2160 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
2161 | zlog_debug( | |
2162 | "%u:%s: Freeing route rn %p, re %p (type %d)", | |
2163 | re->vrf_id, buf, rn, re, re->type); | |
2164 | } | |
7a4bb9c5 | 2165 | |
d62a17ae | 2166 | rib_unlink(rn, re); |
2167 | } else { | |
2168 | rib_queue_add(rn); | |
2169 | } | |
718e3744 | 2170 | } |
2171 | ||
f0f77c9a | 2172 | /* This function dumps the contents of a given RE entry into |
dc95824a DO |
2173 | * standard debug log. Calling function name and IP prefix in |
2174 | * question are passed as 1st and 2nd arguments. | |
2175 | */ | |
2176 | ||
d62a17ae | 2177 | void _route_entry_dump(const char *func, union prefixconstptr pp, |
2178 | union prefixconstptr src_pp, | |
2179 | const struct route_entry *re) | |
2180 | { | |
2181 | const struct prefix *p = pp.p; | |
2182 | const struct prefix *src_p = src_pp.p; | |
2183 | bool is_srcdst = src_p && src_p->prefixlen; | |
2184 | char straddr[PREFIX_STRLEN]; | |
2185 | char srcaddr[PREFIX_STRLEN]; | |
2186 | struct nexthop *nexthop; | |
2187 | ||
2188 | zlog_debug("%s: dumping RE entry %p for %s%s%s vrf %u", func, | |
2189 | (const void *)re, prefix2str(pp, straddr, sizeof(straddr)), | |
2190 | is_srcdst ? " from " : "", | |
2191 | is_srcdst ? prefix2str(src_pp, srcaddr, sizeof(srcaddr)) | |
2192 | : "", | |
2193 | re->vrf_id); | |
cc54cfee RW |
2194 | zlog_debug("%s: uptime == %lu, type == %u, instance == %d, table == %d", |
2195 | func, (unsigned long)re->uptime, re->type, re->instance, | |
2196 | re->table); | |
d62a17ae | 2197 | zlog_debug( |
2198 | "%s: metric == %u, mtu == %u, distance == %u, flags == %u, status == %u", | |
2199 | func, re->metric, re->mtu, re->distance, re->flags, re->status); | |
2200 | zlog_debug("%s: nexthop_num == %u, nexthop_active_num == %u", func, | |
2201 | re->nexthop_num, re->nexthop_active_num); | |
2202 | ||
7ee30f28 | 2203 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
d62a17ae | 2204 | inet_ntop(p->family, &nexthop->gate, straddr, INET6_ADDRSTRLEN); |
32391aff | 2205 | zlog_debug("%s: %s %s[%u] vrf %u with flags %s%s%s", func, |
d62a17ae | 2206 | (nexthop->rparent ? " NH" : "NH"), straddr, |
32391aff | 2207 | nexthop->ifindex, nexthop->vrf_id, |
d62a17ae | 2208 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE) |
2209 | ? "ACTIVE " | |
2210 | : ""), | |
2211 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB) | |
2212 | ? "FIB " | |
2213 | : ""), | |
2214 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE) | |
2215 | ? "RECURSIVE" | |
2216 | : "")); | |
2217 | } | |
2218 | zlog_debug("%s: dump complete", func); | |
dc95824a DO |
2219 | } |
2220 | ||
2221 | /* This is an exported helper to rtm_read() to dump the strange | |
f0f77c9a | 2222 | * RE entry found by rib_lookup_ipv4_route() |
dc95824a DO |
2223 | */ |
2224 | ||
d62a17ae | 2225 | void rib_lookup_and_dump(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
2226 | { | |
2227 | struct route_table *table; | |
2228 | struct route_node *rn; | |
2229 | struct route_entry *re; | |
2230 | char prefix_buf[INET_ADDRSTRLEN]; | |
2231 | ||
2232 | /* Lookup table. */ | |
2233 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
2234 | if (!table) { | |
32391aff DS |
2235 | zlog_err("%s:%u zebra_vrf_table() returned NULL", |
2236 | __func__, vrf_id); | |
d62a17ae | 2237 | return; |
2238 | } | |
2239 | ||
2240 | /* Scan the RIB table for exactly matching RE entry. */ | |
2241 | rn = route_node_lookup(table, (struct prefix *)p); | |
2242 | ||
2243 | /* No route for this prefix. */ | |
2244 | if (!rn) { | |
32391aff | 2245 | zlog_debug("%s:%u lookup failed for %s", __func__, vrf_id, |
d62a17ae | 2246 | prefix2str((struct prefix *)p, prefix_buf, |
2247 | sizeof(prefix_buf))); | |
2248 | return; | |
2249 | } | |
2250 | ||
2251 | /* Unlock node. */ | |
2252 | route_unlock_node(rn); | |
2253 | ||
2254 | /* let's go */ | |
a2addae8 | 2255 | RNODE_FOREACH_RE (rn, re) { |
32391aff DS |
2256 | zlog_debug("%s:%u rn %p, re %p: %s, %s", |
2257 | __func__, vrf_id, | |
2258 | (void *)rn, (void *)re, | |
d62a17ae | 2259 | (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED) |
2260 | ? "removed" | |
2261 | : "NOT removed"), | |
2262 | (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED) | |
2263 | ? "selected" | |
2264 | : "NOT selected")); | |
2265 | route_entry_dump(p, NULL, re); | |
2266 | } | |
dc95824a DO |
2267 | } |
2268 | ||
20e5ff0a DO |
2269 | /* Check if requested address assignment will fail due to another |
2270 | * route being installed by zebra in FIB already. Take necessary | |
2271 | * actions, if needed: remove such a route from FIB and deSELECT | |
f0f77c9a | 2272 | * corresponding RE entry. Then put affected RN into RIBQ head. |
20e5ff0a | 2273 | */ |
d62a17ae | 2274 | void rib_lookup_and_pushup(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
2275 | { | |
2276 | struct route_table *table; | |
2277 | struct route_node *rn; | |
d62a17ae | 2278 | unsigned changed = 0; |
5f7a4718 | 2279 | rib_dest_t *dest; |
d62a17ae | 2280 | |
2281 | if (NULL == (table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id))) { | |
32391aff DS |
2282 | zlog_err("%s:%u zebra_vrf_table() returned NULL", |
2283 | __func__, vrf_id); | |
d62a17ae | 2284 | return; |
2285 | } | |
2286 | ||
2287 | /* No matches would be the simplest case. */ | |
2288 | if (NULL == (rn = route_node_lookup(table, (struct prefix *)p))) | |
2289 | return; | |
2290 | ||
2291 | /* Unlock node. */ | |
2292 | route_unlock_node(rn); | |
2293 | ||
5f7a4718 | 2294 | dest = rib_dest_from_rnode(rn); |
d62a17ae | 2295 | /* Check all RE entries. In case any changes have to be done, requeue |
2296 | * the RN into RIBQ head. If the routing message about the new connected | |
2297 | * route (generated by the IP address we are going to assign very soon) | |
2298 | * comes before the RIBQ is processed, the new RE entry will join | |
2299 | * RIBQ record already on head. This is necessary for proper | |
2300 | * revalidation | |
2301 | * of the rest of the RE. | |
2302 | */ | |
5f7a4718 DS |
2303 | if (dest->selected_fib && !RIB_SYSTEM_ROUTE(dest->selected_fib)) { |
2304 | changed = 1; | |
2305 | if (IS_ZEBRA_DEBUG_RIB) { | |
2306 | char buf[PREFIX_STRLEN]; | |
2307 | ||
2308 | zlog_debug("%u:%s: freeing way for connected prefix", | |
2309 | dest->selected_fib->vrf_id, | |
2310 | prefix2str(&rn->p, buf, sizeof(buf))); | |
2311 | route_entry_dump(&rn->p, NULL, dest->selected_fib); | |
d62a17ae | 2312 | } |
5f7a4718 | 2313 | rib_uninstall(rn, dest->selected_fib); |
d62a17ae | 2314 | } |
2315 | if (changed) | |
2316 | rib_queue_add(rn); | |
20e5ff0a DO |
2317 | } |
2318 | ||
d62a17ae | 2319 | int rib_add_multipath(afi_t afi, safi_t safi, struct prefix *p, |
2320 | struct prefix_ipv6 *src_p, struct route_entry *re) | |
718e3744 | 2321 | { |
d62a17ae | 2322 | struct route_table *table; |
2323 | struct route_node *rn; | |
2324 | struct route_entry *same; | |
2325 | struct nexthop *nexthop; | |
2326 | int ret = 0; | |
b4c034b0 | 2327 | |
d62a17ae | 2328 | if (!re) |
2329 | return 0; | |
b4c034b0 | 2330 | |
1f610a1f | 2331 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
05737783 | 2332 | |
d62a17ae | 2333 | /* Lookup table. */ |
7865c65d RW |
2334 | table = zebra_vrf_table_with_table_id(afi, safi, re->vrf_id, re->table); |
2335 | if (!table) { | |
2336 | XFREE(MTYPE_RE, re); | |
d62a17ae | 2337 | return 0; |
7865c65d | 2338 | } |
cddf391b | 2339 | |
d62a17ae | 2340 | /* Make it sure prefixlen is applied to the prefix. */ |
2341 | apply_mask(p); | |
2342 | if (src_p) | |
2343 | apply_mask_ipv6(src_p); | |
718e3744 | 2344 | |
d62a17ae | 2345 | /* Set default distance by route type. */ |
2346 | if (re->distance == 0) { | |
0492eea0 | 2347 | re->distance = route_distance(re->type); |
718e3744 | 2348 | |
d62a17ae | 2349 | /* iBGP distance is 200. */ |
2350 | if (re->type == ZEBRA_ROUTE_BGP | |
2351 | && CHECK_FLAG(re->flags, ZEBRA_FLAG_IBGP)) | |
2352 | re->distance = 200; | |
2353 | } | |
718e3744 | 2354 | |
d62a17ae | 2355 | /* Lookup route node.*/ |
2356 | rn = srcdest_rnode_get(table, p, src_p); | |
718e3744 | 2357 | |
d62a17ae | 2358 | /* If same type of route are installed, treat it as a implicit |
2359 | withdraw. */ | |
a2addae8 | 2360 | RNODE_FOREACH_RE (rn, same) { |
d62a17ae | 2361 | if (CHECK_FLAG(same->status, ROUTE_ENTRY_REMOVED)) |
2362 | continue; | |
41ec9222 | 2363 | |
eb327fa5 RW |
2364 | if (same->type != re->type) |
2365 | continue; | |
2366 | if (same->instance != re->instance) | |
2367 | continue; | |
996c9314 LB |
2368 | if (same->type == ZEBRA_ROUTE_KERNEL |
2369 | && same->metric != re->metric) | |
eb327fa5 | 2370 | continue; |
844b3a87 RW |
2371 | /* |
2372 | * We should allow duplicate connected routes because of | |
2373 | * IPv6 link-local routes and unnumbered interfaces on Linux. | |
2374 | */ | |
2375 | if (same->type != ZEBRA_ROUTE_CONNECT) | |
d62a17ae | 2376 | break; |
2377 | } | |
718e3744 | 2378 | |
d62a17ae | 2379 | /* If this route is kernel route, set FIB flag to the route. */ |
8628fc61 | 2380 | if (RIB_SYSTEM_ROUTE(re)) |
7ee30f28 | 2381 | for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) |
d62a17ae | 2382 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
718e3744 | 2383 | |
d62a17ae | 2384 | /* Link new re to node.*/ |
2385 | if (IS_ZEBRA_DEBUG_RIB) { | |
2386 | rnode_debug( | |
2387 | rn, re->vrf_id, | |
2388 | "Inserting route rn %p, re %p (type %d) existing %p", | |
2389 | (void *)rn, (void *)re, re->type, (void *)same); | |
718e3744 | 2390 | |
d62a17ae | 2391 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2392 | route_entry_dump(p, src_p, re); | |
718e3744 | 2393 | } |
d62a17ae | 2394 | rib_addnode(rn, re, 1); |
2395 | ret = 1; | |
6b0655a2 | 2396 | |
d62a17ae | 2397 | /* Free implicit route.*/ |
2398 | if (same) { | |
2399 | rib_delnode(rn, same); | |
2400 | ret = -1; | |
2401 | } | |
718e3744 | 2402 | |
d62a17ae | 2403 | route_unlock_node(rn); |
2404 | return ret; | |
2405 | } | |
2406 | ||
2407 | void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, | |
d7c0a89a | 2408 | unsigned short instance, int flags, struct prefix *p, |
fd36be7e | 2409 | struct prefix_ipv6 *src_p, const struct nexthop *nh, |
a317a9b9 | 2410 | uint32_t table_id, uint32_t metric, bool fromkernel) |
d62a17ae | 2411 | { |
2412 | struct route_table *table; | |
2413 | struct route_node *rn; | |
2414 | struct route_entry *re; | |
2415 | struct route_entry *fib = NULL; | |
2416 | struct route_entry *same = NULL; | |
fd36be7e | 2417 | struct nexthop *rtnh; |
d62a17ae | 2418 | char buf2[INET6_ADDRSTRLEN]; |
5f7a4718 | 2419 | rib_dest_t *dest; |
d62a17ae | 2420 | |
1f610a1f | 2421 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
d62a17ae | 2422 | |
2423 | /* Lookup table. */ | |
2424 | table = zebra_vrf_table_with_table_id(afi, safi, vrf_id, table_id); | |
2425 | if (!table) | |
2426 | return; | |
2427 | ||
2428 | /* Apply mask. */ | |
2429 | apply_mask(p); | |
2430 | if (src_p) | |
2431 | apply_mask_ipv6(src_p); | |
2432 | ||
2433 | /* Lookup route node. */ | |
2434 | rn = srcdest_rnode_lookup(table, p, src_p); | |
2435 | if (!rn) { | |
2436 | char dst_buf[PREFIX_STRLEN], src_buf[PREFIX_STRLEN]; | |
2437 | ||
2438 | prefix2str(p, dst_buf, sizeof(dst_buf)); | |
2439 | if (src_p && src_p->prefixlen) | |
2440 | prefix2str(src_p, src_buf, sizeof(src_buf)); | |
2441 | else | |
2442 | src_buf[0] = '\0'; | |
2443 | ||
2444 | if (IS_ZEBRA_DEBUG_RIB) | |
2445 | zlog_debug("%u:%s%s%s doesn't exist in rib", vrf_id, | |
2446 | dst_buf, | |
2447 | (src_buf[0] != '\0') ? " from " : "", | |
2448 | src_buf); | |
2449 | return; | |
2450 | } | |
718e3744 | 2451 | |
5f7a4718 DS |
2452 | dest = rib_dest_from_rnode(rn); |
2453 | fib = dest->selected_fib; | |
2454 | ||
d62a17ae | 2455 | /* Lookup same type route. */ |
a2addae8 | 2456 | RNODE_FOREACH_RE (rn, re) { |
d62a17ae | 2457 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
2458 | continue; | |
2459 | ||
d62a17ae | 2460 | if (re->type != type) |
2461 | continue; | |
2462 | if (re->instance != instance) | |
2463 | continue; | |
996c9314 | 2464 | if (re->type == ZEBRA_ROUTE_KERNEL && re->metric != metric) |
f19435a8 | 2465 | continue; |
7ee30f28 | 2466 | if (re->type == ZEBRA_ROUTE_CONNECT && (rtnh = re->ng.nexthop) |
fd36be7e DL |
2467 | && rtnh->type == NEXTHOP_TYPE_IFINDEX && nh) { |
2468 | if (rtnh->ifindex != nh->ifindex) | |
d62a17ae | 2469 | continue; |
d62a17ae | 2470 | same = re; |
2471 | break; | |
2472 | } | |
2473 | /* Make sure that the route found has the same gateway. */ | |
2474 | else { | |
fd36be7e | 2475 | if (nh == NULL) { |
d62a17ae | 2476 | same = re; |
2477 | break; | |
2478 | } | |
7ee30f28 | 2479 | for (ALL_NEXTHOPS(re->ng, rtnh)) |
fd36be7e | 2480 | if (nexthop_same_no_recurse(rtnh, nh)) { |
d62a17ae | 2481 | same = re; |
2482 | break; | |
2483 | } | |
2484 | if (same) | |
2485 | break; | |
2486 | } | |
2487 | } | |
2488 | /* If same type of route can't be found and this message is from | |
2489 | kernel. */ | |
2490 | if (!same) { | |
5dfeba19 DS |
2491 | /* |
2492 | * In the past(HA!) we could get here because | |
2493 | * we were receiving a route delete from the | |
2494 | * kernel and we're not marking the proto | |
2495 | * as coming from it's appropriate originator. | |
2496 | * Now that we are properly noticing the fact | |
2497 | * that the kernel has deleted our route we | |
2498 | * are not going to get called in this path | |
2499 | * I am going to leave this here because | |
2500 | * this might still work this way on non-linux | |
2501 | * platforms as well as some weird state I have | |
2502 | * not properly thought of yet. | |
2503 | * If we can show that this code path is | |
2504 | * dead then we can remove it. | |
2505 | */ | |
b8faa875 | 2506 | if (fib && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) { |
d62a17ae | 2507 | if (IS_ZEBRA_DEBUG_RIB) { |
2508 | rnode_debug( | |
2509 | rn, vrf_id, | |
2510 | "rn %p, re %p (type %d) was deleted from kernel, adding", | |
2511 | rn, fib, fib->type); | |
2512 | } | |
2513 | if (allow_delete) { | |
2514 | /* Unset flags. */ | |
7ee30f28 | 2515 | for (rtnh = fib->ng.nexthop; rtnh; |
fd36be7e DL |
2516 | rtnh = rtnh->next) |
2517 | UNSET_FLAG(rtnh->flags, | |
d62a17ae | 2518 | NEXTHOP_FLAG_FIB); |
2519 | ||
ed216282 DS |
2520 | /* |
2521 | * This is a non FRR route | |
2522 | * as such we should mark | |
2523 | * it as deleted | |
2524 | */ | |
5f7a4718 | 2525 | dest->selected_fib = NULL; |
d62a17ae | 2526 | } else { |
2527 | /* This means someone else, other than Zebra, | |
2528 | * has deleted | |
2529 | * a Zebra router from the kernel. We will add | |
2530 | * it back */ | |
2531 | rib_install_kernel(rn, fib, NULL); | |
2532 | } | |
2533 | } else { | |
2534 | if (IS_ZEBRA_DEBUG_RIB) { | |
fd36be7e | 2535 | if (nh) |
d62a17ae | 2536 | rnode_debug( |
2537 | rn, vrf_id, | |
2538 | "via %s ifindex %d type %d " | |
2539 | "doesn't exist in rib", | |
36228974 | 2540 | inet_ntop(afi2family(afi), |
2541 | &nh->gate, buf2, | |
2542 | sizeof(buf2)), | |
2543 | nh->ifindex, type); | |
d62a17ae | 2544 | else |
2545 | rnode_debug( | |
2546 | rn, vrf_id, | |
fd36be7e DL |
2547 | "type %d doesn't exist in rib", |
2548 | type); | |
d62a17ae | 2549 | } |
2550 | route_unlock_node(rn); | |
2551 | return; | |
2552 | } | |
2553 | } | |
718e3744 | 2554 | |
5dfeba19 | 2555 | if (same) { |
996c9314 LB |
2556 | if (fromkernel && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE) |
2557 | && !allow_delete) { | |
5dfeba19 DS |
2558 | rib_install_kernel(rn, same, NULL); |
2559 | route_unlock_node(rn); | |
2560 | ||
2561 | return; | |
2562 | } | |
6134fd82 | 2563 | |
90264d64 | 2564 | if (CHECK_FLAG(flags, ZEBRA_FLAG_EVPN_ROUTE)) { |
6134fd82 | 2565 | struct nexthop *tmp_nh; |
2566 | ||
7ee30f28 | 2567 | for (ALL_NEXTHOPS(re->ng, tmp_nh)) { |
6134fd82 | 2568 | struct ipaddr vtep_ip; |
2569 | ||
2570 | memset(&vtep_ip, 0, sizeof(struct ipaddr)); | |
1ec31309 | 2571 | if (afi == AFI_IP) { |
2572 | vtep_ip.ipa_type = IPADDR_V4; | |
2573 | memcpy(&(vtep_ip.ipaddr_v4), | |
2574 | &(tmp_nh->gate.ipv4), | |
2575 | sizeof(struct in_addr)); | |
2576 | } else { | |
2577 | vtep_ip.ipa_type = IPADDR_V6; | |
2578 | memcpy(&(vtep_ip.ipaddr_v6), | |
2579 | &(tmp_nh->gate.ipv6), | |
2580 | sizeof(struct in6_addr)); | |
2581 | } | |
a317a9b9 | 2582 | zebra_vxlan_evpn_vrf_route_del(re->vrf_id, |
6134fd82 | 2583 | &vtep_ip, p); |
2584 | } | |
2585 | } | |
d62a17ae | 2586 | rib_delnode(rn, same); |
5dfeba19 | 2587 | } |
05737783 | 2588 | |
d62a17ae | 2589 | route_unlock_node(rn); |
2590 | return; | |
2591 | } | |
718e3744 | 2592 | |
718e3744 | 2593 | |
d7c0a89a QY |
2594 | int rib_add(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
2595 | unsigned short instance, int flags, struct prefix *p, | |
2596 | struct prefix_ipv6 *src_p, const struct nexthop *nh, | |
2597 | uint32_t table_id, uint32_t metric, uint32_t mtu, uint8_t distance, | |
2598 | route_tag_t tag) | |
d62a17ae | 2599 | { |
2600 | struct route_entry *re; | |
66af6845 | 2601 | struct nexthop *nexthop; |
718e3744 | 2602 | |
66af6845 | 2603 | /* Allocate new route_entry structure. */ |
d62a17ae | 2604 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); |
d62a17ae | 2605 | re->type = type; |
2606 | re->instance = instance; | |
2607 | re->distance = distance; | |
2608 | re->flags = flags; | |
2609 | re->metric = metric; | |
2610 | re->mtu = mtu; | |
2611 | re->table = table_id; | |
2612 | re->vrf_id = vrf_id; | |
2613 | re->nexthop_num = 0; | |
2614 | re->uptime = time(NULL); | |
4e40b6d6 | 2615 | re->tag = tag; |
d62a17ae | 2616 | |
66af6845 RW |
2617 | /* Add nexthop. */ |
2618 | nexthop = nexthop_new(); | |
2619 | *nexthop = *nh; | |
2620 | route_entry_nexthop_add(re, nexthop); | |
718e3744 | 2621 | |
66af6845 | 2622 | return rib_add_multipath(afi, safi, p, src_p, re); |
718e3744 | 2623 | } |
2624 | ||
1c848137 | 2625 | /* Schedule routes of a particular table (address-family) based on event. */ |
d62a17ae | 2626 | static void rib_update_table(struct route_table *table, |
2627 | rib_update_event_t event) | |
2628 | { | |
2629 | struct route_node *rn; | |
2630 | struct route_entry *re, *next; | |
2631 | ||
2632 | /* Walk all routes and queue for processing, if appropriate for | |
2633 | * the trigger event. | |
2634 | */ | |
2635 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { | |
1ca60f2c DS |
2636 | /* |
2637 | * If we are looking at a route node and the node | |
2638 | * has already been queued we don't | |
2639 | * need to queue it up again | |
2640 | */ | |
996c9314 LB |
2641 | if (rn->info && CHECK_FLAG(rib_dest_from_rnode(rn)->flags, |
2642 | RIB_ROUTE_ANY_QUEUED)) | |
1ca60f2c | 2643 | continue; |
d62a17ae | 2644 | switch (event) { |
2645 | case RIB_UPDATE_IF_CHANGE: | |
2646 | /* Examine all routes that won't get processed by the | |
2647 | * protocol or | |
2648 | * triggered by nexthop evaluation (NHT). This would be | |
2649 | * system, | |
2650 | * kernel and certain static routes. Note that NHT will | |
2651 | * get | |
2652 | * triggered upon an interface event as connected routes | |
2653 | * always | |
2654 | * get queued for processing. | |
2655 | */ | |
a2addae8 | 2656 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
0a16efff DS |
2657 | struct nexthop *nh; |
2658 | ||
996c9314 LB |
2659 | if (re->type != ZEBRA_ROUTE_SYSTEM |
2660 | && re->type != ZEBRA_ROUTE_KERNEL | |
2661 | && re->type != ZEBRA_ROUTE_CONNECT | |
2662 | && re->type != ZEBRA_ROUTE_STATIC) | |
0a16efff DS |
2663 | continue; |
2664 | ||
2665 | if (re->type != ZEBRA_ROUTE_STATIC) { | |
2666 | rib_queue_add(rn); | |
2667 | continue; | |
2668 | } | |
2669 | ||
7ee30f28 | 2670 | for (nh = re->ng.nexthop; nh; nh = nh->next) |
0a16efff DS |
2671 | if (!(nh->type == NEXTHOP_TYPE_IPV4 |
2672 | || nh->type == NEXTHOP_TYPE_IPV6)) | |
2673 | break; | |
2674 | ||
2675 | /* If we only have nexthops to a | |
2676 | * gateway, NHT will | |
2677 | * take care. | |
2678 | */ | |
2679 | if (nh) | |
d62a17ae | 2680 | rib_queue_add(rn); |
2681 | } | |
2682 | break; | |
2683 | ||
2684 | case RIB_UPDATE_RMAP_CHANGE: | |
2685 | case RIB_UPDATE_OTHER: | |
2686 | /* Right now, examine all routes. Can restrict to a | |
2687 | * protocol in | |
2688 | * some cases (TODO). | |
2689 | */ | |
2690 | if (rnode_to_ribs(rn)) | |
2691 | rib_queue_add(rn); | |
2692 | break; | |
2693 | ||
2694 | default: | |
2695 | break; | |
2696 | } | |
2697 | } | |
b84c7253 | 2698 | } |
2699 | ||
718e3744 | 2700 | /* RIB update function. */ |
d62a17ae | 2701 | void rib_update(vrf_id_t vrf_id, rib_update_event_t event) |
718e3744 | 2702 | { |
d62a17ae | 2703 | struct route_table *table; |
1c848137 | 2704 | |
d62a17ae | 2705 | /* Process routes of interested address-families. */ |
2706 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
2707 | if (table) | |
2708 | rib_update_table(table, event); | |
718e3744 | 2709 | |
d62a17ae | 2710 | table = zebra_vrf_table(AFI_IP6, SAFI_UNICAST, vrf_id); |
2711 | if (table) | |
2712 | rib_update_table(table, event); | |
718e3744 | 2713 | } |
2714 | ||
718e3744 | 2715 | /* Delete self installed routes after zebra is relaunched. */ |
95a29032 | 2716 | void rib_sweep_table(struct route_table *table) |
d62a17ae | 2717 | { |
2718 | struct route_node *rn; | |
2719 | struct route_entry *re; | |
2720 | struct route_entry *next; | |
915902cb | 2721 | struct nexthop *nexthop; |
d62a17ae | 2722 | |
915902cb DS |
2723 | if (!table) |
2724 | return; | |
d62a17ae | 2725 | |
915902cb | 2726 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
a2addae8 | 2727 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
915902cb DS |
2728 | if (IS_ZEBRA_DEBUG_RIB) |
2729 | route_entry_dump(&rn->p, NULL, re); | |
2730 | ||
2731 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
2732 | continue; | |
2733 | ||
2734 | if (!CHECK_FLAG(re->flags, ZEBRA_FLAG_SELFROUTE)) | |
2735 | continue; | |
2736 | ||
2737 | /* | |
2738 | * So we are starting up and have received | |
2739 | * routes from the kernel that we have installed | |
2740 | * from a previous run of zebra but not cleaned | |
2741 | * up ( say a kill -9 ) | |
2742 | * But since we haven't actually installed | |
2743 | * them yet( we received them from the kernel ) | |
2744 | * we don't think they are active. | |
2745 | * So let's pretend they are active to actually | |
2746 | * remove them. | |
2747 | * In all honesty I'm not sure if we should | |
2748 | * mark them as active when we receive them | |
2749 | * This is startup only so probably ok. | |
2750 | * | |
2751 | * If we ever decide to move rib_sweep_table | |
2752 | * to a different spot (ie startup ) | |
2753 | * this decision needs to be revisited | |
2754 | */ | |
7ee30f28 | 2755 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
915902cb DS |
2756 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
2757 | ||
0c555cc6 DS |
2758 | rib_uninstall_kernel(rn, re); |
2759 | rib_delnode(rn, re); | |
915902cb DS |
2760 | } |
2761 | } | |
718e3744 | 2762 | } |
2763 | ||
2764 | /* Sweep all RIB tables. */ | |
d62a17ae | 2765 | void rib_sweep_route(void) |
718e3744 | 2766 | { |
d62a17ae | 2767 | struct vrf *vrf; |
2768 | struct zebra_vrf *zvrf; | |
78104b9b | 2769 | |
a2addae8 | 2770 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
915902cb DS |
2771 | if ((zvrf = vrf->info) == NULL) |
2772 | continue; | |
2773 | ||
d62a17ae | 2774 | rib_sweep_table(zvrf->table[AFI_IP][SAFI_UNICAST]); |
2775 | rib_sweep_table(zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
2776 | } | |
95a29032 DS |
2777 | |
2778 | zebra_ns_sweep_route(); | |
718e3744 | 2779 | } |
2ea1ab1c VT |
2780 | |
2781 | /* Remove specific by protocol routes from 'table'. */ | |
d7c0a89a | 2782 | unsigned long rib_score_proto_table(uint8_t proto, unsigned short instance, |
47a08aa9 | 2783 | struct route_table *table) |
d62a17ae | 2784 | { |
2785 | struct route_node *rn; | |
2786 | struct route_entry *re; | |
2787 | struct route_entry *next; | |
2788 | unsigned long n = 0; | |
2789 | ||
2790 | if (table) | |
2791 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) | |
a2addae8 | 2792 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 2793 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
2794 | continue; | |
2795 | if (re->type == proto | |
2796 | && re->instance == instance) { | |
2797 | rib_delnode(rn, re); | |
2798 | n++; | |
2799 | } | |
2800 | } | |
2801 | return n; | |
2ea1ab1c VT |
2802 | } |
2803 | ||
2804 | /* Remove specific by protocol routes. */ | |
d7c0a89a | 2805 | unsigned long rib_score_proto(uint8_t proto, unsigned short instance) |
2ea1ab1c | 2806 | { |
d62a17ae | 2807 | struct vrf *vrf; |
2808 | struct zebra_vrf *zvrf; | |
2809 | unsigned long cnt = 0; | |
78104b9b | 2810 | |
a2addae8 RW |
2811 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
2812 | if ((zvrf = vrf->info) != NULL) | |
2813 | cnt += rib_score_proto_table( | |
2814 | proto, instance, | |
2815 | zvrf->table[AFI_IP][SAFI_UNICAST]) | |
2816 | + rib_score_proto_table( | |
2817 | proto, instance, | |
2818 | zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
78104b9b | 2819 | |
47a08aa9 DS |
2820 | cnt += zebra_ns_score_proto(proto, instance); |
2821 | ||
d62a17ae | 2822 | return cnt; |
2ea1ab1c VT |
2823 | } |
2824 | ||
718e3744 | 2825 | /* Close RIB and clean up kernel routes. */ |
d62a17ae | 2826 | void rib_close_table(struct route_table *table) |
718e3744 | 2827 | { |
d62a17ae | 2828 | struct route_node *rn; |
1e9f448f | 2829 | rib_table_info_t *info; |
5f7a4718 | 2830 | rib_dest_t *dest; |
718e3744 | 2831 | |
1e9f448f DS |
2832 | if (!table) |
2833 | return; | |
9fd92e3c | 2834 | |
1e9f448f | 2835 | info = table->info; |
5adc2528 | 2836 | |
5f7a4718 DS |
2837 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
2838 | dest = rib_dest_from_rnode(rn); | |
1e9f448f | 2839 | |
5f7a4718 | 2840 | if (dest && dest->selected_fib) { |
1e9f448f DS |
2841 | if (info->safi == SAFI_UNICAST) |
2842 | hook_call(rib_update, rn, NULL); | |
2843 | ||
5f7a4718 DS |
2844 | if (!RIB_SYSTEM_ROUTE(dest->selected_fib)) |
2845 | rib_uninstall_kernel(rn, dest->selected_fib); | |
1e9f448f | 2846 | } |
5f7a4718 | 2847 | } |
718e3744 | 2848 | } |
2849 | ||
718e3744 | 2850 | /* Routing information base initialize. */ |
d62a17ae | 2851 | void rib_init(void) |
718e3744 | 2852 | { |
d62a17ae | 2853 | rib_queue_init(&zebrad); |
718e3744 | 2854 | } |
0915bb0c AS |
2855 | |
2856 | /* | |
2857 | * vrf_id_get_next | |
2858 | * | |
2859 | * Get the first vrf id that is greater than the given vrf id if any. | |
2860 | * | |
2861 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
2862 | */ | |
d62a17ae | 2863 | static inline int vrf_id_get_next(vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 2864 | { |
d62a17ae | 2865 | struct vrf *vrf; |
b72ede27 | 2866 | |
d62a17ae | 2867 | vrf = vrf_lookup_by_id(vrf_id); |
2868 | if (vrf) { | |
2869 | vrf = RB_NEXT(vrf_id_head, vrf); | |
2870 | if (vrf) { | |
2871 | *next_id_p = vrf->vrf_id; | |
2872 | return 1; | |
2873 | } | |
2874 | } | |
0915bb0c | 2875 | |
d62a17ae | 2876 | return 0; |
0915bb0c AS |
2877 | } |
2878 | ||
2879 | /* | |
2880 | * rib_tables_iter_next | |
2881 | * | |
2882 | * Returns the next table in the iteration. | |
2883 | */ | |
d62a17ae | 2884 | struct route_table *rib_tables_iter_next(rib_tables_iter_t *iter) |
2885 | { | |
2886 | struct route_table *table; | |
2887 | ||
2888 | /* | |
2889 | * Array that helps us go over all AFI/SAFI combinations via one | |
2890 | * index. | |
2891 | */ | |
2892 | static struct { | |
2893 | afi_t afi; | |
2894 | safi_t safi; | |
2895 | } afi_safis[] = { | |
2896 | {AFI_IP, SAFI_UNICAST}, {AFI_IP, SAFI_MULTICAST}, | |
2897 | {AFI_IP, SAFI_LABELED_UNICAST}, {AFI_IP6, SAFI_UNICAST}, | |
2898 | {AFI_IP6, SAFI_MULTICAST}, {AFI_IP6, SAFI_LABELED_UNICAST}, | |
2899 | }; | |
2900 | ||
2901 | table = NULL; | |
2902 | ||
2903 | switch (iter->state) { | |
2904 | ||
2905 | case RIB_TABLES_ITER_S_INIT: | |
2906 | iter->vrf_id = VRF_DEFAULT; | |
2907 | iter->afi_safi_ix = -1; | |
2908 | ||
2909 | /* Fall through */ | |
2910 | ||
2911 | case RIB_TABLES_ITER_S_ITERATING: | |
2912 | iter->afi_safi_ix++; | |
2913 | while (1) { | |
2914 | ||
2915 | while (iter->afi_safi_ix | |
2916 | < (int)ZEBRA_NUM_OF(afi_safis)) { | |
2917 | table = zebra_vrf_table( | |
2918 | afi_safis[iter->afi_safi_ix].afi, | |
2919 | afi_safis[iter->afi_safi_ix].safi, | |
2920 | iter->vrf_id); | |
2921 | if (table) | |
2922 | break; | |
2923 | ||
2924 | iter->afi_safi_ix++; | |
2925 | } | |
2926 | ||
2927 | /* | |
2928 | * Found another table in this vrf. | |
2929 | */ | |
2930 | if (table) | |
2931 | break; | |
2932 | ||
2933 | /* | |
2934 | * Done with all tables in the current vrf, go to the | |
2935 | * next | |
2936 | * one. | |
2937 | */ | |
2938 | if (!vrf_id_get_next(iter->vrf_id, &iter->vrf_id)) | |
2939 | break; | |
2940 | ||
2941 | iter->afi_safi_ix = 0; | |
2942 | } | |
0915bb0c | 2943 | |
0915bb0c AS |
2944 | break; |
2945 | ||
d62a17ae | 2946 | case RIB_TABLES_ITER_S_DONE: |
2947 | return NULL; | |
0915bb0c AS |
2948 | } |
2949 | ||
d62a17ae | 2950 | if (table) |
2951 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
2952 | else | |
2953 | iter->state = RIB_TABLES_ITER_S_DONE; | |
0915bb0c | 2954 | |
d62a17ae | 2955 | return table; |
0915bb0c | 2956 | } |