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718e3744 | 1 | /* Routing Information Base. |
2 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
718e3744 | 23 | #include "command.h" |
43e52561 QY |
24 | #include "if.h" |
25 | #include "linklist.h" | |
718e3744 | 26 | #include "log.h" |
deaa50db | 27 | #include "log_int.h" |
43e52561 QY |
28 | #include "memory.h" |
29 | #include "mpls.h" | |
30 | #include "nexthop.h" | |
31 | #include "prefix.h" | |
7514fb77 PJ |
32 | #include "prefix.h" |
33 | #include "routemap.h" | |
43e52561 | 34 | #include "sockunion.h" |
05737783 | 35 | #include "srcdest_table.h" |
43e52561 QY |
36 | #include "table.h" |
37 | #include "thread.h" | |
38 | #include "vrf.h" | |
39 | #include "workqueue.h" | |
718e3744 | 40 | |
89272910 | 41 | #include "zebra/zebra_router.h" |
43e52561 QY |
42 | #include "zebra/connected.h" |
43 | #include "zebra/debug.h" | |
44 | #include "zebra/interface.h" | |
45 | #include "zebra/redistribute.h" | |
718e3744 | 46 | #include "zebra/rib.h" |
47 | #include "zebra/rt.h" | |
43e52561 QY |
48 | #include "zebra/zapi_msg.h" |
49 | #include "zebra/zebra_errors.h" | |
50 | #include "zebra/zebra_memory.h" | |
7c551956 | 51 | #include "zebra/zebra_ns.h" |
fb018d25 | 52 | #include "zebra/zebra_rnh.h" |
43e52561 QY |
53 | #include "zebra/zebra_routemap.h" |
54 | #include "zebra/zebra_vrf.h" | |
6134fd82 | 55 | #include "zebra/zebra_vxlan.h" |
7cdb1a84 MS |
56 | #include "zebra/zapi_msg.h" |
57 | #include "zebra/zebra_dplane.h" | |
58 | ||
59 | /* | |
60 | * Event, list, and mutex for delivery of dataplane results | |
61 | */ | |
62 | static pthread_mutex_t dplane_mutex; | |
63 | static struct thread *t_dplane; | |
25779064 | 64 | static struct dplane_ctx_q rib_dplane_q; |
718e3744 | 65 | |
d62a17ae | 66 | DEFINE_HOOK(rib_update, (struct route_node * rn, const char *reason), |
67 | (rn, reason)) | |
4f8ea50c | 68 | |
6baf7bb8 DS |
69 | /* Should we allow non Quagga processes to delete our routes */ |
70 | extern int allow_delete; | |
71 | ||
718e3744 | 72 | /* Each route type's string and default distance value. */ |
d62a17ae | 73 | static const struct { |
74 | int key; | |
75 | int distance; | |
73547a75 | 76 | uint8_t meta_q_map; |
d62a17ae | 77 | } route_info[ZEBRA_ROUTE_MAX] = { |
73547a75 DS |
78 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0, 4}, |
79 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0, 0}, | |
80 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0, 0}, | |
81 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1, 1}, | |
82 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120, 2}, | |
83 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120, 2}, | |
84 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110, 2}, | |
85 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110, 2}, | |
86 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115, 2}, | |
87 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */, 3}, | |
88 | [ZEBRA_ROUTE_PIM] = {ZEBRA_ROUTE_PIM, 255, 4}, | |
89 | [ZEBRA_ROUTE_EIGRP] = {ZEBRA_ROUTE_EIGRP, 90, 2}, | |
90 | [ZEBRA_ROUTE_NHRP] = {ZEBRA_ROUTE_NHRP, 10, 2}, | |
91 | [ZEBRA_ROUTE_HSLS] = {ZEBRA_ROUTE_HSLS, 255, 4}, | |
92 | [ZEBRA_ROUTE_OLSR] = {ZEBRA_ROUTE_OLSR, 255, 4}, | |
93 | [ZEBRA_ROUTE_TABLE] = {ZEBRA_ROUTE_TABLE, 150, 1}, | |
94 | [ZEBRA_ROUTE_LDP] = {ZEBRA_ROUTE_LDP, 150, 4}, | |
95 | [ZEBRA_ROUTE_VNC] = {ZEBRA_ROUTE_VNC, 20, 3}, | |
96 | [ZEBRA_ROUTE_VNC_DIRECT] = {ZEBRA_ROUTE_VNC_DIRECT, 20, 3}, | |
97 | [ZEBRA_ROUTE_VNC_DIRECT_RH] = {ZEBRA_ROUTE_VNC_DIRECT_RH, 20, 3}, | |
98 | [ZEBRA_ROUTE_BGP_DIRECT] = {ZEBRA_ROUTE_BGP_DIRECT, 20, 3}, | |
99 | [ZEBRA_ROUTE_BGP_DIRECT_EXT] = {ZEBRA_ROUTE_BGP_DIRECT_EXT, 20, 3}, | |
100 | [ZEBRA_ROUTE_BABEL] = {ZEBRA_ROUTE_BABEL, 100, 2}, | |
101 | [ZEBRA_ROUTE_SHARP] = {ZEBRA_ROUTE_SHARP, 150, 4}, | |
c710b277 | 102 | |
d62a17ae | 103 | /* no entry/default: 150 */ |
718e3744 | 104 | }; |
6b0655a2 | 105 | |
4623d897 DL |
106 | /* RPF lookup behaviour */ |
107 | static enum multicast_mode ipv4_multicast_mode = MCAST_NO_CONFIG; | |
108 | ||
6c4f4e6e | 109 | |
d62a17ae | 110 | static void __attribute__((format(printf, 5, 6))) |
111 | _rnode_zlog(const char *_func, vrf_id_t vrf_id, struct route_node *rn, | |
112 | int priority, const char *msgfmt, ...) | |
2263a412 | 113 | { |
d62a17ae | 114 | char buf[SRCDEST2STR_BUFFER + sizeof(" (MRIB)")]; |
115 | char msgbuf[512]; | |
116 | va_list ap; | |
2263a412 | 117 | |
d62a17ae | 118 | va_start(ap, msgfmt); |
119 | vsnprintf(msgbuf, sizeof(msgbuf), msgfmt, ap); | |
120 | va_end(ap); | |
2263a412 | 121 | |
d62a17ae | 122 | if (rn) { |
123 | rib_table_info_t *info = srcdest_rnode_table_info(rn); | |
124 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
cb653491 | 125 | |
d62a17ae | 126 | if (info->safi == SAFI_MULTICAST) |
127 | strcat(buf, " (MRIB)"); | |
128 | } else { | |
129 | snprintf(buf, sizeof(buf), "{(route_node *) NULL}"); | |
130 | } | |
2263a412 | 131 | |
d62a17ae | 132 | zlog(priority, "%s: %d:%s: %s", _func, vrf_id, buf, msgbuf); |
2263a412 DL |
133 | } |
134 | ||
d62a17ae | 135 | #define rnode_debug(node, vrf_id, ...) \ |
2263a412 | 136 | _rnode_zlog(__func__, vrf_id, node, LOG_DEBUG, __VA_ARGS__) |
d62a17ae | 137 | #define rnode_info(node, ...) \ |
2263a412 DL |
138 | _rnode_zlog(__func__, vrf_id, node, LOG_INFO, __VA_ARGS__) |
139 | ||
fd289fc8 | 140 | uint8_t route_distance(int type) |
40c7bdb0 | 141 | { |
fd289fc8 | 142 | uint8_t distance; |
40c7bdb0 | 143 | |
d62a17ae | 144 | if ((unsigned)type >= array_size(route_info)) |
145 | distance = 150; | |
146 | else | |
147 | distance = route_info[type].distance; | |
40c7bdb0 | 148 | |
d62a17ae | 149 | return distance; |
40c7bdb0 | 150 | } |
151 | ||
d7c0a89a | 152 | int is_zebra_valid_kernel_table(uint32_t table_id) |
7a4bb9c5 | 153 | { |
8f500a1c | 154 | #ifdef linux |
d62a17ae | 155 | if ((table_id == RT_TABLE_UNSPEC) || (table_id == RT_TABLE_LOCAL) |
156 | || (table_id == RT_TABLE_COMPAT)) | |
157 | return 0; | |
8f500a1c RW |
158 | #endif |
159 | ||
d62a17ae | 160 | return 1; |
7a4bb9c5 DS |
161 | } |
162 | ||
d7c0a89a | 163 | int is_zebra_main_routing_table(uint32_t table_id) |
7a4bb9c5 | 164 | { |
d62a17ae | 165 | if ((table_id == RT_TABLE_MAIN) |
166 | || (table_id == zebrad.rtm_table_default)) | |
167 | return 1; | |
168 | return 0; | |
7a4bb9c5 DS |
169 | } |
170 | ||
86391e56 | 171 | int zebra_check_addr(const struct prefix *p) |
0aabccc0 | 172 | { |
d62a17ae | 173 | if (p->family == AF_INET) { |
d7c0a89a | 174 | uint32_t addr; |
0aabccc0 | 175 | |
d62a17ae | 176 | addr = p->u.prefix4.s_addr; |
177 | addr = ntohl(addr); | |
0aabccc0 | 178 | |
d62a17ae | 179 | if (IPV4_NET127(addr) || IN_CLASSD(addr) |
180 | || IPV4_LINKLOCAL(addr)) | |
181 | return 0; | |
182 | } | |
183 | if (p->family == AF_INET6) { | |
184 | if (IN6_IS_ADDR_LOOPBACK(&p->u.prefix6)) | |
185 | return 0; | |
186 | if (IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
187 | return 0; | |
188 | } | |
189 | return 1; | |
0aabccc0 DD |
190 | } |
191 | ||
fa713d9e | 192 | /* Add nexthop to the end of a rib node's nexthop list */ |
d62a17ae | 193 | void route_entry_nexthop_add(struct route_entry *re, struct nexthop *nexthop) |
fa713d9e | 194 | { |
7ee30f28 | 195 | nexthop_add(&re->ng.nexthop, nexthop); |
d62a17ae | 196 | re->nexthop_num++; |
718e3744 | 197 | } |
198 | ||
6e26278c | 199 | |
6e26278c DS |
200 | /** |
201 | * copy_nexthop - copy a nexthop to the rib structure. | |
202 | */ | |
d62a17ae | 203 | void route_entry_copy_nexthops(struct route_entry *re, struct nexthop *nh) |
6e26278c | 204 | { |
7ee30f28 DS |
205 | assert(!re->ng.nexthop); |
206 | copy_nexthops(&re->ng.nexthop, nh, NULL); | |
d62a17ae | 207 | for (struct nexthop *nexthop = nh; nexthop; nexthop = nexthop->next) |
208 | re->nexthop_num++; | |
6e26278c DS |
209 | } |
210 | ||
718e3744 | 211 | /* Delete specified nexthop from the list. */ |
d62a17ae | 212 | void route_entry_nexthop_delete(struct route_entry *re, struct nexthop *nexthop) |
718e3744 | 213 | { |
d62a17ae | 214 | if (nexthop->next) |
215 | nexthop->next->prev = nexthop->prev; | |
216 | if (nexthop->prev) | |
217 | nexthop->prev->next = nexthop->next; | |
218 | else | |
7ee30f28 | 219 | re->ng.nexthop = nexthop->next; |
d62a17ae | 220 | re->nexthop_num--; |
718e3744 | 221 | } |
222 | ||
fa713d9e | 223 | |
d62a17ae | 224 | struct nexthop *route_entry_nexthop_ifindex_add(struct route_entry *re, |
4a7371e9 DS |
225 | ifindex_t ifindex, |
226 | vrf_id_t nh_vrf_id) | |
718e3744 | 227 | { |
d62a17ae | 228 | struct nexthop *nexthop; |
718e3744 | 229 | |
d62a17ae | 230 | nexthop = nexthop_new(); |
231 | nexthop->type = NEXTHOP_TYPE_IFINDEX; | |
232 | nexthop->ifindex = ifindex; | |
4a7371e9 | 233 | nexthop->vrf_id = nh_vrf_id; |
718e3744 | 234 | |
d62a17ae | 235 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 236 | |
d62a17ae | 237 | return nexthop; |
718e3744 | 238 | } |
239 | ||
d62a17ae | 240 | struct nexthop *route_entry_nexthop_ipv4_add(struct route_entry *re, |
241 | struct in_addr *ipv4, | |
4a7371e9 DS |
242 | struct in_addr *src, |
243 | vrf_id_t nh_vrf_id) | |
718e3744 | 244 | { |
d62a17ae | 245 | struct nexthop *nexthop; |
718e3744 | 246 | |
d62a17ae | 247 | nexthop = nexthop_new(); |
248 | nexthop->type = NEXTHOP_TYPE_IPV4; | |
4a7371e9 | 249 | nexthop->vrf_id = nh_vrf_id; |
d62a17ae | 250 | nexthop->gate.ipv4 = *ipv4; |
251 | if (src) | |
252 | nexthop->src.ipv4 = *src; | |
718e3744 | 253 | |
d62a17ae | 254 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 255 | |
d62a17ae | 256 | return nexthop; |
718e3744 | 257 | } |
258 | ||
d62a17ae | 259 | struct nexthop *route_entry_nexthop_ipv4_ifindex_add(struct route_entry *re, |
260 | struct in_addr *ipv4, | |
261 | struct in_addr *src, | |
4a7371e9 DS |
262 | ifindex_t ifindex, |
263 | vrf_id_t nh_vrf_id) | |
718e3744 | 264 | { |
d62a17ae | 265 | struct nexthop *nexthop; |
266 | struct interface *ifp; | |
718e3744 | 267 | |
d62a17ae | 268 | nexthop = nexthop_new(); |
4a7371e9 | 269 | nexthop->vrf_id = nh_vrf_id; |
d62a17ae | 270 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
271 | nexthop->gate.ipv4 = *ipv4; | |
272 | if (src) | |
273 | nexthop->src.ipv4 = *src; | |
274 | nexthop->ifindex = ifindex; | |
4a7371e9 | 275 | ifp = if_lookup_by_index(nexthop->ifindex, nh_vrf_id); |
d62a17ae | 276 | /*Pending: need to think if null ifp here is ok during bootup? |
277 | There was a crash because ifp here was coming to be NULL */ | |
278 | if (ifp) | |
996c9314 | 279 | if (connected_is_unnumbered(ifp) |
103e4a71 CF |
280 | || CHECK_FLAG(re->flags, ZEBRA_FLAG_EVPN_ROUTE) |
281 | || CHECK_FLAG(re->flags, ZEBRA_FLAG_ONLINK)) { | |
d62a17ae | 282 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); |
283 | } | |
718e3744 | 284 | |
d62a17ae | 285 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 286 | |
d62a17ae | 287 | return nexthop; |
718e3744 | 288 | } |
289 | ||
d62a17ae | 290 | struct nexthop *route_entry_nexthop_ipv6_add(struct route_entry *re, |
4a7371e9 DS |
291 | struct in6_addr *ipv6, |
292 | vrf_id_t nh_vrf_id) | |
718e3744 | 293 | { |
d62a17ae | 294 | struct nexthop *nexthop; |
718e3744 | 295 | |
d62a17ae | 296 | nexthop = nexthop_new(); |
4a7371e9 | 297 | nexthop->vrf_id = nh_vrf_id; |
d62a17ae | 298 | nexthop->type = NEXTHOP_TYPE_IPV6; |
299 | nexthop->gate.ipv6 = *ipv6; | |
718e3744 | 300 | |
d62a17ae | 301 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 302 | |
d62a17ae | 303 | return nexthop; |
718e3744 | 304 | } |
305 | ||
d62a17ae | 306 | struct nexthop *route_entry_nexthop_ipv6_ifindex_add(struct route_entry *re, |
307 | struct in6_addr *ipv6, | |
4a7371e9 DS |
308 | ifindex_t ifindex, |
309 | vrf_id_t nh_vrf_id) | |
718e3744 | 310 | { |
d62a17ae | 311 | struct nexthop *nexthop; |
718e3744 | 312 | |
d62a17ae | 313 | nexthop = nexthop_new(); |
4a7371e9 | 314 | nexthop->vrf_id = nh_vrf_id; |
d62a17ae | 315 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
316 | nexthop->gate.ipv6 = *ipv6; | |
317 | nexthop->ifindex = ifindex; | |
103e4a71 CF |
318 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_EVPN_ROUTE) |
319 | || CHECK_FLAG(re->flags, ZEBRA_FLAG_ONLINK)) { | |
1ec31309 | 320 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); |
103e4a71 | 321 | } |
718e3744 | 322 | |
d62a17ae | 323 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 324 | |
d62a17ae | 325 | return nexthop; |
718e3744 | 326 | } |
718e3744 | 327 | |
a8309422 | 328 | struct nexthop *route_entry_nexthop_blackhole_add(struct route_entry *re, |
60466a63 | 329 | enum blackhole_type bh_type) |
595db7f1 | 330 | { |
d62a17ae | 331 | struct nexthop *nexthop; |
595db7f1 | 332 | |
d62a17ae | 333 | nexthop = nexthop_new(); |
4a7371e9 | 334 | nexthop->vrf_id = VRF_DEFAULT; |
d62a17ae | 335 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
a8309422 | 336 | nexthop->bh_type = bh_type; |
595db7f1 | 337 | |
d62a17ae | 338 | route_entry_nexthop_add(re, nexthop); |
595db7f1 | 339 | |
d62a17ae | 340 | return nexthop; |
595db7f1 | 341 | } |
342 | ||
86391e56 | 343 | static void nexthop_set_resolved(afi_t afi, const struct nexthop *newhop, |
d62a17ae | 344 | struct nexthop *nexthop) |
4491a88f | 345 | { |
d62a17ae | 346 | struct nexthop *resolved_hop; |
4491a88f | 347 | |
d62a17ae | 348 | resolved_hop = nexthop_new(); |
349 | SET_FLAG(resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
d855d11f | 350 | |
4a7371e9 | 351 | resolved_hop->vrf_id = nexthop->vrf_id; |
d855d11f RW |
352 | switch (newhop->type) { |
353 | case NEXTHOP_TYPE_IPV4: | |
354 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
355 | /* If the resolving route specifies a gateway, use it */ | |
d62a17ae | 356 | resolved_hop->type = newhop->type; |
357 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
4491a88f | 358 | |
d62a17ae | 359 | if (newhop->ifindex) { |
360 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
361 | resolved_hop->ifindex = newhop->ifindex; | |
d62a17ae | 362 | } |
d855d11f RW |
363 | break; |
364 | case NEXTHOP_TYPE_IPV6: | |
365 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
d62a17ae | 366 | resolved_hop->type = newhop->type; |
367 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
368 | ||
369 | if (newhop->ifindex) { | |
370 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
371 | resolved_hop->ifindex = newhop->ifindex; | |
372 | } | |
d855d11f RW |
373 | break; |
374 | case NEXTHOP_TYPE_IFINDEX: | |
375 | /* If the resolving route is an interface route, | |
376 | * it means the gateway we are looking up is connected | |
377 | * to that interface. (The actual network is _not_ onlink). | |
378 | * Therefore, the resolved route should have the original | |
379 | * gateway as nexthop as it is directly connected. | |
380 | * | |
381 | * On Linux, we have to set the onlink netlink flag because | |
382 | * otherwise, the kernel won't accept the route. | |
383 | */ | |
d62a17ae | 384 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; |
385 | if (afi == AFI_IP) { | |
386 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
387 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
388 | } else if (afi == AFI_IP6) { | |
389 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
390 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
391 | } | |
392 | resolved_hop->ifindex = newhop->ifindex; | |
d855d11f RW |
393 | break; |
394 | case NEXTHOP_TYPE_BLACKHOLE: | |
59693377 DS |
395 | resolved_hop->type = NEXTHOP_TYPE_BLACKHOLE; |
396 | resolved_hop->bh_type = nexthop->bh_type; | |
d855d11f | 397 | break; |
59693377 | 398 | } |
d855d11f | 399 | |
effcfaeb DS |
400 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
401 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
402 | ||
f674dfe2 RW |
403 | /* Copy labels of the resolved route */ |
404 | if (newhop->nh_label) | |
405 | nexthop_add_labels(resolved_hop, newhop->nh_label_type, | |
406 | newhop->nh_label->num_labels, | |
407 | &newhop->nh_label->label[0]); | |
408 | ||
d62a17ae | 409 | resolved_hop->rparent = nexthop; |
410 | nexthop_add(&nexthop->resolved, resolved_hop); | |
4491a88f DS |
411 | } |
412 | ||
718e3744 | 413 | /* If force flag is not set, do not modify falgs at all for uninstall |
414 | the route from FIB. */ | |
d62a17ae | 415 | static int nexthop_active(afi_t afi, struct route_entry *re, |
0dddbf72 | 416 | struct nexthop *nexthop, bool set, |
d62a17ae | 417 | struct route_node *top) |
418 | { | |
419 | struct prefix p; | |
420 | struct route_table *table; | |
421 | struct route_node *rn; | |
5f7a4718 | 422 | struct route_entry *match = NULL; |
d62a17ae | 423 | int resolved; |
424 | struct nexthop *newhop; | |
425 | struct interface *ifp; | |
5f7a4718 | 426 | rib_dest_t *dest; |
d62a17ae | 427 | |
428 | if ((nexthop->type == NEXTHOP_TYPE_IPV4) | |
429 | || nexthop->type == NEXTHOP_TYPE_IPV6) | |
430 | nexthop->ifindex = 0; | |
431 | ||
432 | if (set) { | |
433 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
d62a17ae | 434 | nexthops_free(nexthop->resolved); |
435 | nexthop->resolved = NULL; | |
436 | re->nexthop_mtu = 0; | |
d44ca835 | 437 | } |
18ff3edd | 438 | |
1ec31309 | 439 | /* Next hops (remote VTEPs) for EVPN routes are fully resolved. */ |
440 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_EVPN_RVTEP)) | |
441 | return 1; | |
442 | ||
d62a17ae | 443 | /* Skip nexthops that have been filtered out due to route-map */ |
444 | /* The nexthops are specific to this route and so the same */ | |
445 | /* nexthop for a different route may not have this flag set */ | |
34815ea3 DS |
446 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) { |
447 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
448 | zlog_debug("\t%s: Nexthop Filtered", | |
449 | __PRETTY_FUNCTION__); | |
d62a17ae | 450 | return 0; |
34815ea3 | 451 | } |
d62a17ae | 452 | |
453 | /* | |
454 | * Check to see if we should trust the passed in information | |
455 | * for UNNUMBERED interfaces as that we won't find the GW | |
456 | * address in the routing table. | |
457 | */ | |
458 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) { | |
4a7371e9 | 459 | ifp = if_lookup_by_index(nexthop->ifindex, nexthop->vrf_id); |
103e4a71 CF |
460 | if ((ifp && connected_is_unnumbered(ifp)) |
461 | || CHECK_FLAG(re->flags, ZEBRA_FLAG_ONLINK)) { | |
d62a17ae | 462 | if (if_is_operative(ifp)) |
463 | return 1; | |
34815ea3 DS |
464 | else { |
465 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
466 | zlog_debug( | |
467 | "\t%s: Onlink and interface %s is not operative", | |
468 | __PRETTY_FUNCTION__, ifp->name); | |
d62a17ae | 469 | return 0; |
34815ea3 DS |
470 | } |
471 | } else { | |
472 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
473 | zlog_debug( | |
474 | "\t%s: Interface %s is not unnumbered", | |
475 | __PRETTY_FUNCTION__, | |
476 | ifp ? ifp->name : "Unknown"); | |
d62a17ae | 477 | return 0; |
34815ea3 | 478 | } |
16814f96 | 479 | } |
718e3744 | 480 | |
d62a17ae | 481 | /* Make lookup prefix. */ |
482 | memset(&p, 0, sizeof(struct prefix)); | |
483 | switch (afi) { | |
484 | case AFI_IP: | |
485 | p.family = AF_INET; | |
486 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
487 | p.u.prefix4 = nexthop->gate.ipv4; | |
488 | break; | |
489 | case AFI_IP6: | |
490 | p.family = AF_INET6; | |
491 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
492 | p.u.prefix6 = nexthop->gate.ipv6; | |
493 | break; | |
494 | default: | |
495 | assert(afi != AFI_IP && afi != AFI_IP6); | |
496 | break; | |
718e3744 | 497 | } |
d62a17ae | 498 | /* Lookup table. */ |
4a7371e9 | 499 | table = zebra_vrf_table(afi, SAFI_UNICAST, nexthop->vrf_id); |
34815ea3 DS |
500 | if (!table) { |
501 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
502 | zlog_debug("\t%s: Table not found", | |
503 | __PRETTY_FUNCTION__); | |
d62a17ae | 504 | return 0; |
34815ea3 | 505 | } |
d62a17ae | 506 | |
507 | rn = route_node_match(table, (struct prefix *)&p); | |
508 | while (rn) { | |
509 | route_unlock_node(rn); | |
510 | ||
fd7fd9e5 DS |
511 | /* Lookup should halt if we've matched against ourselves ('top', |
512 | * if specified) - i.e., we cannot have a nexthop NH1 is | |
513 | * resolved by a route NH1. The exception is if the route is a | |
514 | * host route. | |
515 | */ | |
516 | if (top && rn == top) | |
996c9314 | 517 | if (((afi == AFI_IP) && (rn->p.prefixlen != 32)) |
34815ea3 DS |
518 | || ((afi == AFI_IP6) && (rn->p.prefixlen != 128))) { |
519 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
520 | zlog_debug( | |
521 | "\t%s: Matched against ourself and prefix length is not max bit length", | |
522 | __PRETTY_FUNCTION__); | |
fd7fd9e5 | 523 | return 0; |
34815ea3 | 524 | } |
d62a17ae | 525 | |
526 | /* Pick up selected route. */ | |
527 | /* However, do not resolve over default route unless explicitly | |
528 | * allowed. */ | |
529 | if (is_default_prefix(&rn->p) | |
34815ea3 DS |
530 | && !rnh_resolve_via_default(p.family)) { |
531 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
532 | zlog_debug( | |
533 | "\t:%s: Resolved against default route", | |
534 | __PRETTY_FUNCTION__); | |
d62a17ae | 535 | return 0; |
34815ea3 | 536 | } |
d62a17ae | 537 | |
5f7a4718 | 538 | dest = rib_dest_from_rnode(rn); |
996c9314 LB |
539 | if (dest && dest->selected_fib |
540 | && !CHECK_FLAG(dest->selected_fib->status, | |
541 | ROUTE_ENTRY_REMOVED) | |
542 | && dest->selected_fib->type != ZEBRA_ROUTE_TABLE) | |
5f7a4718 | 543 | match = dest->selected_fib; |
48a53dc7 | 544 | |
d62a17ae | 545 | /* If there is no selected route or matched route is EGP, go up |
546 | tree. */ | |
547 | if (!match) { | |
548 | do { | |
549 | rn = rn->parent; | |
550 | } while (rn && rn->info == NULL); | |
551 | if (rn) | |
552 | route_lock_node(rn); | |
c87bdd2b | 553 | |
d62a17ae | 554 | continue; |
555 | } | |
556 | ||
d62a17ae | 557 | if (match->type == ZEBRA_ROUTE_CONNECT) { |
558 | /* Directly point connected route. */ | |
7ee30f28 | 559 | newhop = match->ng.nexthop; |
d62a17ae | 560 | if (newhop) { |
561 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
562 | || nexthop->type == NEXTHOP_TYPE_IPV6) | |
563 | nexthop->ifindex = newhop->ifindex; | |
564 | } | |
565 | return 1; | |
4e8b02f4 | 566 | } else if (CHECK_FLAG(re->flags, ZEBRA_FLAG_ALLOW_RECURSION)) { |
d62a17ae | 567 | resolved = 0; |
7ee30f28 | 568 | for (ALL_NEXTHOPS(match->ng, newhop)) { |
a8309422 DL |
569 | if (!CHECK_FLAG(newhop->flags, |
570 | NEXTHOP_FLAG_FIB)) | |
571 | continue; | |
572 | if (CHECK_FLAG(newhop->flags, | |
573 | NEXTHOP_FLAG_RECURSIVE)) | |
574 | continue; | |
575 | ||
576 | if (set) { | |
577 | SET_FLAG(nexthop->flags, | |
578 | NEXTHOP_FLAG_RECURSIVE); | |
579 | SET_FLAG(re->status, | |
580 | ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
581 | nexthop_set_resolved(afi, newhop, | |
582 | nexthop); | |
d62a17ae | 583 | } |
a8309422 DL |
584 | resolved = 1; |
585 | } | |
43e31305 JB |
586 | if (resolved && set) |
587 | re->nexthop_mtu = match->mtu; | |
34815ea3 DS |
588 | if (!resolved && IS_ZEBRA_DEBUG_RIB_DETAILED) |
589 | zlog_debug("\t%s: Recursion failed to find", | |
590 | __PRETTY_FUNCTION__); | |
d62a17ae | 591 | return resolved; |
592 | } else if (re->type == ZEBRA_ROUTE_STATIC) { | |
593 | resolved = 0; | |
7ee30f28 | 594 | for (ALL_NEXTHOPS(match->ng, newhop)) { |
a8309422 DL |
595 | if (!CHECK_FLAG(newhop->flags, |
596 | NEXTHOP_FLAG_FIB)) | |
597 | continue; | |
598 | ||
599 | if (set) { | |
600 | SET_FLAG(nexthop->flags, | |
601 | NEXTHOP_FLAG_RECURSIVE); | |
602 | nexthop_set_resolved(afi, newhop, | |
603 | nexthop); | |
d62a17ae | 604 | } |
a8309422 DL |
605 | resolved = 1; |
606 | } | |
d62a17ae | 607 | if (resolved && set) |
608 | re->nexthop_mtu = match->mtu; | |
34815ea3 DS |
609 | |
610 | if (!resolved && IS_ZEBRA_DEBUG_RIB_DETAILED) | |
611 | zlog_debug( | |
612 | "\t%s: Static route unable to resolve", | |
613 | __PRETTY_FUNCTION__); | |
d62a17ae | 614 | return resolved; |
615 | } else { | |
7939ff76 DS |
616 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { |
617 | zlog_debug("\t%s: Route Type %s has not turned on recursion", | |
618 | __PRETTY_FUNCTION__, | |
619 | zebra_route_string(re->type)); | |
620 | if (re->type == ZEBRA_ROUTE_BGP && | |
621 | !CHECK_FLAG(re->flags, ZEBRA_FLAG_IBGP)) | |
622 | zlog_debug("\tEBGP: see \"disable-ebgp-connected-route-check\" or \"disable-connected-check\""); | |
623 | } | |
d62a17ae | 624 | return 0; |
625 | } | |
718e3744 | 626 | } |
7939ff76 DS |
627 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
628 | zlog_debug("\t%s: Nexthop did not lookup in table", | |
629 | __PRETTY_FUNCTION__); | |
d62a17ae | 630 | return 0; |
718e3744 | 631 | } |
718e3744 | 632 | |
d62a17ae | 633 | struct route_entry *rib_match(afi_t afi, safi_t safi, vrf_id_t vrf_id, |
634 | union g_addr *addr, struct route_node **rn_out) | |
635 | { | |
636 | struct prefix p; | |
637 | struct route_table *table; | |
638 | struct route_node *rn; | |
5f7a4718 | 639 | struct route_entry *match = NULL; |
d62a17ae | 640 | struct nexthop *newhop; |
641 | ||
642 | /* Lookup table. */ | |
643 | table = zebra_vrf_table(afi, safi, vrf_id); | |
644 | if (!table) | |
645 | return 0; | |
646 | ||
647 | memset(&p, 0, sizeof(struct prefix)); | |
648 | p.family = afi; | |
649 | if (afi == AFI_IP) { | |
650 | p.u.prefix4 = addr->ipv4; | |
651 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
652 | } else { | |
653 | p.u.prefix6 = addr->ipv6; | |
654 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
655 | } | |
718e3744 | 656 | |
d62a17ae | 657 | rn = route_node_match(table, (struct prefix *)&p); |
718e3744 | 658 | |
d62a17ae | 659 | while (rn) { |
5f7a4718 DS |
660 | rib_dest_t *dest; |
661 | ||
d62a17ae | 662 | route_unlock_node(rn); |
718e3744 | 663 | |
5f7a4718 | 664 | dest = rib_dest_from_rnode(rn); |
996c9314 LB |
665 | if (dest && dest->selected_fib |
666 | && !CHECK_FLAG(dest->selected_fib->status, | |
667 | ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 668 | match = dest->selected_fib; |
718e3744 | 669 | |
d62a17ae | 670 | /* If there is no selected route or matched route is EGP, go up |
671 | tree. */ | |
672 | if (!match) { | |
673 | do { | |
674 | rn = rn->parent; | |
675 | } while (rn && rn->info == NULL); | |
676 | if (rn) | |
677 | route_lock_node(rn); | |
678 | } else { | |
679 | if (match->type != ZEBRA_ROUTE_CONNECT) { | |
680 | int found = 0; | |
7ee30f28 | 681 | for (ALL_NEXTHOPS(match->ng, newhop)) |
d62a17ae | 682 | if (CHECK_FLAG(newhop->flags, |
683 | NEXTHOP_FLAG_FIB)) { | |
684 | found = 1; | |
685 | break; | |
686 | } | |
687 | if (!found) | |
688 | return NULL; | |
689 | } | |
690 | ||
691 | if (rn_out) | |
692 | *rn_out = rn; | |
693 | return match; | |
694 | } | |
16814f96 | 695 | } |
d62a17ae | 696 | return NULL; |
697 | } | |
698 | ||
699 | struct route_entry *rib_match_ipv4_multicast(vrf_id_t vrf_id, | |
700 | struct in_addr addr, | |
701 | struct route_node **rn_out) | |
702 | { | |
703 | struct route_entry *re = NULL, *mre = NULL, *ure = NULL; | |
704 | struct route_node *m_rn = NULL, *u_rn = NULL; | |
705 | union g_addr gaddr = {.ipv4 = addr}; | |
706 | ||
707 | switch (ipv4_multicast_mode) { | |
708 | case MCAST_MRIB_ONLY: | |
709 | return rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
710 | rn_out); | |
711 | case MCAST_URIB_ONLY: | |
712 | return rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, rn_out); | |
713 | case MCAST_NO_CONFIG: | |
714 | case MCAST_MIX_MRIB_FIRST: | |
715 | re = mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
716 | &m_rn); | |
717 | if (!mre) | |
718 | re = ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, | |
719 | &gaddr, &u_rn); | |
720 | break; | |
721 | case MCAST_MIX_DISTANCE: | |
722 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
723 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
724 | if (mre && ure) | |
725 | re = ure->distance < mre->distance ? ure : mre; | |
726 | else if (mre) | |
727 | re = mre; | |
728 | else if (ure) | |
729 | re = ure; | |
730 | break; | |
731 | case MCAST_MIX_PFXLEN: | |
732 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
733 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
734 | if (mre && ure) | |
735 | re = u_rn->p.prefixlen > m_rn->p.prefixlen ? ure : mre; | |
736 | else if (mre) | |
737 | re = mre; | |
738 | else if (ure) | |
739 | re = ure; | |
740 | break; | |
718e3744 | 741 | } |
33550aa8 | 742 | |
d62a17ae | 743 | if (rn_out) |
744 | *rn_out = (re == mre) ? m_rn : u_rn; | |
718e3744 | 745 | |
d62a17ae | 746 | if (IS_ZEBRA_DEBUG_RIB) { |
747 | char buf[BUFSIZ]; | |
748 | inet_ntop(AF_INET, &addr, buf, BUFSIZ); | |
4623d897 | 749 | |
32391aff DS |
750 | zlog_debug("%s: %s: vrf: %u found %s, using %s", |
751 | __func__, buf, vrf_id, | |
d62a17ae | 752 | mre ? (ure ? "MRIB+URIB" : "MRIB") |
753 | : ure ? "URIB" : "nothing", | |
754 | re == ure ? "URIB" : re == mre ? "MRIB" : "none"); | |
755 | } | |
756 | return re; | |
4623d897 DL |
757 | } |
758 | ||
d62a17ae | 759 | void multicast_mode_ipv4_set(enum multicast_mode mode) |
4623d897 | 760 | { |
d62a17ae | 761 | if (IS_ZEBRA_DEBUG_RIB) |
762 | zlog_debug("%s: multicast lookup mode set (%d)", __func__, | |
763 | mode); | |
764 | ipv4_multicast_mode = mode; | |
4623d897 DL |
765 | } |
766 | ||
d62a17ae | 767 | enum multicast_mode multicast_mode_ipv4_get(void) |
4623d897 | 768 | { |
d62a17ae | 769 | return ipv4_multicast_mode; |
4623d897 DL |
770 | } |
771 | ||
d62a17ae | 772 | struct route_entry *rib_lookup_ipv4(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 773 | { |
d62a17ae | 774 | struct route_table *table; |
775 | struct route_node *rn; | |
5f7a4718 | 776 | struct route_entry *match = NULL; |
d62a17ae | 777 | struct nexthop *nexthop; |
5f7a4718 | 778 | rib_dest_t *dest; |
718e3744 | 779 | |
d62a17ae | 780 | /* Lookup table. */ |
781 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
782 | if (!table) | |
783 | return 0; | |
718e3744 | 784 | |
d62a17ae | 785 | rn = route_node_lookup(table, (struct prefix *)p); |
718e3744 | 786 | |
d62a17ae | 787 | /* No route for this prefix. */ |
788 | if (!rn) | |
789 | return NULL; | |
718e3744 | 790 | |
d62a17ae | 791 | /* Unlock node. */ |
792 | route_unlock_node(rn); | |
5f7a4718 | 793 | dest = rib_dest_from_rnode(rn); |
718e3744 | 794 | |
996c9314 LB |
795 | if (dest && dest->selected_fib |
796 | && !CHECK_FLAG(dest->selected_fib->status, ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 797 | match = dest->selected_fib; |
718e3744 | 798 | |
d62a17ae | 799 | if (!match) |
800 | return NULL; | |
718e3744 | 801 | |
d62a17ae | 802 | if (match->type == ZEBRA_ROUTE_CONNECT) |
803 | return match; | |
f9e1b38e | 804 | |
7ee30f28 | 805 | for (ALL_NEXTHOPS(match->ng, nexthop)) |
d62a17ae | 806 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) |
807 | return match; | |
718e3744 | 808 | |
d62a17ae | 809 | return NULL; |
718e3744 | 810 | } |
811 | ||
d62a17ae | 812 | #define RIB_SYSTEM_ROUTE(R) \ |
813 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
7514fb77 | 814 | |
212df1de PG |
815 | #define RIB_KERNEL_ROUTE(R) \ |
816 | ((R)->type == ZEBRA_ROUTE_KERNEL) | |
817 | ||
dc95824a DO |
818 | /* This function verifies reachability of one given nexthop, which can be |
819 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
820 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
821 | * nexthop->ifindex will be updated appropriately as well. | |
822 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
823 | * not vice versa. | |
824 | * | |
825 | * The return value is the final value of 'ACTIVE' flag. | |
826 | */ | |
827 | ||
d62a17ae | 828 | static unsigned nexthop_active_check(struct route_node *rn, |
829 | struct route_entry *re, | |
0dddbf72 | 830 | struct nexthop *nexthop, bool set) |
d62a17ae | 831 | { |
832 | struct interface *ifp; | |
833 | route_map_result_t ret = RMAP_MATCH; | |
834 | int family; | |
835 | char buf[SRCDEST2STR_BUFFER]; | |
86391e56 | 836 | const struct prefix *p, *src_p; |
ac6eebce | 837 | struct zebra_vrf *zvrf; |
838 | ||
d62a17ae | 839 | srcdest_rnode_prefixes(rn, &p, &src_p); |
840 | ||
841 | if (rn->p.family == AF_INET) | |
842 | family = AFI_IP; | |
843 | else if (rn->p.family == AF_INET6) | |
844 | family = AFI_IP6; | |
845 | else | |
846 | family = 0; | |
847 | switch (nexthop->type) { | |
848 | case NEXTHOP_TYPE_IFINDEX: | |
4a7371e9 | 849 | ifp = if_lookup_by_index(nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 850 | if (ifp && if_is_operative(ifp)) |
851 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
852 | else | |
853 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
854 | break; | |
855 | case NEXTHOP_TYPE_IPV4: | |
856 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
857 | family = AFI_IP; | |
1ec31309 | 858 | if (nexthop_active(AFI_IP, re, nexthop, set, rn)) |
d62a17ae | 859 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
860 | else | |
861 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
862 | break; | |
863 | case NEXTHOP_TYPE_IPV6: | |
864 | family = AFI_IP6; | |
865 | if (nexthop_active(AFI_IP6, re, nexthop, set, rn)) | |
866 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
867 | else | |
868 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
869 | break; | |
870 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
871 | /* RFC 5549, v4 prefix with v6 NH */ | |
872 | if (rn->p.family != AF_INET) | |
873 | family = AFI_IP6; | |
874 | if (IN6_IS_ADDR_LINKLOCAL(&nexthop->gate.ipv6)) { | |
007dbee6 | 875 | ifp = if_lookup_by_index(nexthop->ifindex, |
4a7371e9 | 876 | nexthop->vrf_id); |
d62a17ae | 877 | if (ifp && if_is_operative(ifp)) |
878 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
879 | else | |
880 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
881 | } else { | |
882 | if (nexthop_active(AFI_IP6, re, nexthop, set, rn)) | |
883 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
884 | else | |
885 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
886 | } | |
887 | break; | |
888 | case NEXTHOP_TYPE_BLACKHOLE: | |
889 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
890 | break; | |
891 | default: | |
892 | break; | |
893 | } | |
34815ea3 DS |
894 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) { |
895 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
896 | zlog_debug("\t%s: Unable to find a active nexthop", | |
897 | __PRETTY_FUNCTION__); | |
d62a17ae | 898 | return 0; |
34815ea3 | 899 | } |
d62a17ae | 900 | |
901 | /* XXX: What exactly do those checks do? Do we support | |
ac6eebce | 902 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? |
903 | */ | |
d62a17ae | 904 | if (RIB_SYSTEM_ROUTE(re) || (family == AFI_IP && p->family != AF_INET) |
905 | || (family == AFI_IP6 && p->family != AF_INET6)) | |
906 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
907 | ||
908 | /* The original code didn't determine the family correctly | |
909 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
910 | * from the rib_table_info in those cases. | |
911 | * Possibly it may be better to use only the rib_table_info | |
912 | * in every case. | |
913 | */ | |
914 | if (!family) { | |
915 | rib_table_info_t *info; | |
916 | ||
917 | info = srcdest_rnode_table_info(rn); | |
918 | family = info->afi; | |
718e3744 | 919 | } |
c52ef59f | 920 | |
d62a17ae | 921 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
922 | ||
ac6eebce | 923 | zvrf = zebra_vrf_lookup_by_id(nexthop->vrf_id); |
924 | if (!zvrf) { | |
925 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
926 | zlog_debug("\t%s: zvrf is NULL", __PRETTY_FUNCTION__); | |
927 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
928 | } | |
929 | ||
d62a17ae | 930 | /* It'll get set if required inside */ |
ac6eebce | 931 | ret = zebra_route_map_check(family, re->type, re->instance, p, |
932 | nexthop, zvrf, re->tag); | |
d62a17ae | 933 | if (ret == RMAP_DENYMATCH) { |
934 | if (IS_ZEBRA_DEBUG_RIB) { | |
935 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
936 | zlog_debug( | |
937 | "%u:%s: Filtering out with NH out %s due to route map", | |
938 | re->vrf_id, buf, | |
99b9d960 | 939 | ifindex2ifname(nexthop->ifindex, |
4a7371e9 | 940 | nexthop->vrf_id)); |
d62a17ae | 941 | } |
942 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
518f0eb1 | 943 | } |
d62a17ae | 944 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
718e3744 | 945 | } |
946 | ||
03e232a4 | 947 | /* Iterate over all nexthops of the given RIB entry and refresh their |
f0f77c9a DS |
948 | * ACTIVE flag. re->nexthop_active_num is updated accordingly. If any |
949 | * nexthop is found to toggle the ACTIVE flag, the whole re structure | |
950 | * is flagged with ROUTE_ENTRY_CHANGED. The 4th 'set' argument is | |
03e232a4 DO |
951 | * transparently passed to nexthop_active_check(). |
952 | * | |
953 | * Return value is the new number of active nexthops. | |
954 | */ | |
955 | ||
d62a17ae | 956 | static int nexthop_active_update(struct route_node *rn, struct route_entry *re, |
0dddbf72 | 957 | bool set) |
d62a17ae | 958 | { |
959 | struct nexthop *nexthop; | |
960 | union g_addr prev_src; | |
961 | unsigned int prev_active, new_active, old_num_nh; | |
962 | ifindex_t prev_index; | |
ac6eebce | 963 | |
d62a17ae | 964 | old_num_nh = re->nexthop_active_num; |
965 | ||
966 | re->nexthop_active_num = 0; | |
967 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
968 | ||
7ee30f28 | 969 | for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) { |
d62a17ae | 970 | /* No protocol daemon provides src and so we're skipping |
971 | * tracking it */ | |
972 | prev_src = nexthop->rmap_src; | |
973 | prev_active = CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
974 | prev_index = nexthop->ifindex; | |
220f0f42 DS |
975 | /* |
976 | * We need to respect the multipath_num here | |
977 | * as that what we should be able to install from | |
978 | * a multipath perpsective should not be a data plane | |
979 | * decision point. | |
980 | */ | |
981 | new_active = nexthop_active_check(rn, re, nexthop, set); | |
982 | if (new_active && re->nexthop_active_num >= multipath_num) { | |
983 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
984 | new_active = 0; | |
985 | } | |
986 | if (new_active) | |
d62a17ae | 987 | re->nexthop_active_num++; |
988 | /* Don't allow src setting on IPv6 addr for now */ | |
989 | if (prev_active != new_active || prev_index != nexthop->ifindex | |
990 | || ((nexthop->type >= NEXTHOP_TYPE_IFINDEX | |
991 | && nexthop->type < NEXTHOP_TYPE_IPV6) | |
992 | && prev_src.ipv4.s_addr | |
993 | != nexthop->rmap_src.ipv4.s_addr) | |
994 | || ((nexthop->type >= NEXTHOP_TYPE_IPV6 | |
995 | && nexthop->type < NEXTHOP_TYPE_BLACKHOLE) | |
996 | && !(IPV6_ADDR_SAME(&prev_src.ipv6, | |
997 | &nexthop->rmap_src.ipv6)))) { | |
998 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
999 | SET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | if (old_num_nh != re->nexthop_active_num) | |
1004 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
6e26278c | 1005 | |
d62a17ae | 1006 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED)) { |
1007 | SET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
1008 | } | |
1009 | ||
1010 | return re->nexthop_active_num; | |
718e3744 | 1011 | } |
6baeb988 | 1012 | |
a64448ba DS |
1013 | /* |
1014 | * Is this RIB labeled-unicast? It must be of type BGP and all paths | |
1015 | * (nexthops) must have a label. | |
1016 | */ | |
d62a17ae | 1017 | int zebra_rib_labeled_unicast(struct route_entry *re) |
a64448ba | 1018 | { |
d62a17ae | 1019 | struct nexthop *nexthop = NULL; |
a64448ba | 1020 | |
d62a17ae | 1021 | if (re->type != ZEBRA_ROUTE_BGP) |
1022 | return 0; | |
a64448ba | 1023 | |
7ee30f28 | 1024 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
d62a17ae | 1025 | if (!nexthop->nh_label || !nexthop->nh_label->num_labels) |
1026 | return 0; | |
6b0655a2 | 1027 | |
d62a17ae | 1028 | return 1; |
a64448ba | 1029 | } |
718e3744 | 1030 | |
6ae24471 DS |
1031 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
1032 | * is only used for IPv4. | |
1033 | */ | |
0c555cc6 DS |
1034 | void rib_install_kernel(struct route_node *rn, struct route_entry *re, |
1035 | struct route_entry *old) | |
718e3744 | 1036 | { |
d62a17ae | 1037 | struct nexthop *nexthop; |
1038 | rib_table_info_t *info = srcdest_rnode_table_info(rn); | |
d62a17ae | 1039 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
97f5b441 MS |
1040 | const struct prefix *p, *src_p; |
1041 | enum zebra_dplane_result ret; | |
1042 | ||
1043 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
718e3744 | 1044 | |
d62a17ae | 1045 | srcdest_rnode_prefixes(rn, &p, &src_p); |
416ec78d | 1046 | |
d62a17ae | 1047 | if (info->safi != SAFI_UNICAST) { |
7ee30f28 | 1048 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
d62a17ae | 1049 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 1050 | return; |
25b9cb0c DL |
1051 | } else { |
1052 | struct nexthop *prev; | |
1053 | ||
7ee30f28 | 1054 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
25b9cb0c | 1055 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_DUPLICATE); |
7ee30f28 | 1056 | for (ALL_NEXTHOPS(re->ng, prev)) { |
25b9cb0c DL |
1057 | if (prev == nexthop) |
1058 | break; | |
996c9314 LB |
1059 | if (nexthop_same_firsthop(nexthop, prev)) { |
1060 | SET_FLAG(nexthop->flags, | |
1061 | NEXTHOP_FLAG_DUPLICATE); | |
25b9cb0c DL |
1062 | break; |
1063 | } | |
1064 | } | |
1065 | } | |
d62a17ae | 1066 | } |
718e3744 | 1067 | |
2063a814 DS |
1068 | /* |
1069 | * If this is a replace to a new RE let the originator of the RE | |
1070 | * know that they've lost | |
1071 | */ | |
9a9f8926 | 1072 | if (old && (old != re) && (old->type != re->type)) |
28610f7e | 1073 | zsend_route_notify_owner(old, p, ZAPI_ROUTE_BETTER_ADMIN_WON); |
25b9cb0c | 1074 | |
97f5b441 MS |
1075 | /* Update fib selection */ |
1076 | dest->selected_fib = re; | |
1077 | ||
d62a17ae | 1078 | /* |
1079 | * Make sure we update the FPM any time we send new information to | |
1080 | * the kernel. | |
1081 | */ | |
1082 | hook_call(rib_update, rn, "installing in kernel"); | |
97f5b441 MS |
1083 | |
1084 | /* Send add or update */ | |
5709131c | 1085 | if (old && (old != re)) |
97f5b441 | 1086 | ret = dplane_route_update(rn, re, old); |
5709131c | 1087 | else |
97f5b441 | 1088 | ret = dplane_route_add(rn, re); |
97f5b441 MS |
1089 | |
1090 | switch (ret) { | |
ea1c14f6 | 1091 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
97f5b441 MS |
1092 | if (zvrf) |
1093 | zvrf->installs_queued++; | |
1e885672 | 1094 | break; |
ea1c14f6 | 1095 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
97f5b441 MS |
1096 | { |
1097 | char str[SRCDEST2STR_BUFFER]; | |
1098 | ||
1099 | srcdest_rnode2str(rn, str, sizeof(str)); | |
1100 | flog_err(EC_ZEBRA_DP_INSTALL_FAIL, | |
1101 | "%u:%s: Failed to enqueue dataplane install", | |
1102 | re->vrf_id, str); | |
1e885672 | 1103 | break; |
97f5b441 | 1104 | } |
ea1c14f6 | 1105 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
97f5b441 MS |
1106 | if (zvrf) |
1107 | zvrf->installs++; | |
1e885672 DS |
1108 | break; |
1109 | } | |
d62a17ae | 1110 | |
0c555cc6 | 1111 | return; |
718e3744 | 1112 | } |
1113 | ||
1114 | /* Uninstall the route from kernel. */ | |
0c555cc6 | 1115 | void rib_uninstall_kernel(struct route_node *rn, struct route_entry *re) |
718e3744 | 1116 | { |
d62a17ae | 1117 | struct nexthop *nexthop; |
1118 | rib_table_info_t *info = srcdest_rnode_table_info(rn); | |
d62a17ae | 1119 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
05737783 | 1120 | |
d62a17ae | 1121 | if (info->safi != SAFI_UNICAST) { |
7ee30f28 | 1122 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
d6792f9d | 1123 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 1124 | return; |
d62a17ae | 1125 | } |
416ec78d | 1126 | |
d62a17ae | 1127 | /* |
1128 | * Make sure we update the FPM any time we send new information to | |
97f5b441 | 1129 | * the dataplane. |
d62a17ae | 1130 | */ |
1131 | hook_call(rib_update, rn, "uninstalling from kernel"); | |
97f5b441 MS |
1132 | |
1133 | switch (dplane_route_delete(rn, re)) { | |
ea1c14f6 | 1134 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
97f5b441 MS |
1135 | if (zvrf) |
1136 | zvrf->removals_queued++; | |
1e885672 | 1137 | break; |
ea1c14f6 | 1138 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
97f5b441 MS |
1139 | { |
1140 | char str[SRCDEST2STR_BUFFER]; | |
1141 | ||
1142 | srcdest_rnode2str(rn, str, sizeof(str)); | |
1143 | flog_err(EC_ZEBRA_DP_INSTALL_FAIL, | |
1144 | "%u:%s: Failed to enqueue dataplane uninstall", | |
1145 | re->vrf_id, str); | |
1e885672 | 1146 | break; |
97f5b441 | 1147 | } |
ea1c14f6 | 1148 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
1e885672 DS |
1149 | if (zvrf) |
1150 | zvrf->removals++; | |
1151 | break; | |
1152 | } | |
718e3744 | 1153 | |
0c555cc6 | 1154 | return; |
718e3744 | 1155 | } |
1156 | ||
1157 | /* Uninstall the route from kernel. */ | |
d62a17ae | 1158 | static void rib_uninstall(struct route_node *rn, struct route_entry *re) |
718e3744 | 1159 | { |
d62a17ae | 1160 | rib_table_info_t *info = srcdest_rnode_table_info(rn); |
5f7a4718 | 1161 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
97f5b441 | 1162 | struct nexthop *nexthop; |
416ec78d | 1163 | |
5f7a4718 | 1164 | if (dest && dest->selected_fib == re) { |
d62a17ae | 1165 | if (info->safi == SAFI_UNICAST) |
1166 | hook_call(rib_update, rn, "rib_uninstall"); | |
5adc2528 | 1167 | |
d62a17ae | 1168 | /* If labeled-unicast route, uninstall transit LSP. */ |
1169 | if (zebra_rib_labeled_unicast(re)) | |
1170 | zebra_mpls_lsp_uninstall(info->zvrf, rn, re); | |
7cdb1a84 MS |
1171 | |
1172 | if (!RIB_SYSTEM_ROUTE(re)) | |
1173 | rib_uninstall_kernel(rn, re); | |
97f5b441 MS |
1174 | |
1175 | dest->selected_fib = NULL; | |
1176 | ||
1177 | for (ALL_NEXTHOPS(re->ng, nexthop)) | |
1178 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
d62a17ae | 1179 | } |
446bb95e | 1180 | |
d62a17ae | 1181 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { |
86391e56 MS |
1182 | const struct prefix *p, *src_p; |
1183 | ||
d62a17ae | 1184 | srcdest_rnode_prefixes(rn, &p, &src_p); |
05737783 | 1185 | |
d62a17ae | 1186 | redistribute_delete(p, src_p, re); |
1187 | UNSET_FLAG(re->flags, ZEBRA_FLAG_SELECTED); | |
1188 | } | |
718e3744 | 1189 | } |
1190 | ||
9fd92e3c AS |
1191 | /* |
1192 | * rib_can_delete_dest | |
1193 | * | |
1194 | * Returns TRUE if the given dest can be deleted from the table. | |
1195 | */ | |
d62a17ae | 1196 | static int rib_can_delete_dest(rib_dest_t *dest) |
9fd92e3c | 1197 | { |
d62a17ae | 1198 | if (dest->routes) { |
1199 | return 0; | |
1200 | } | |
9fd92e3c | 1201 | |
d62a17ae | 1202 | /* |
1203 | * Don't delete the dest if we have to update the FPM about this | |
1204 | * prefix. | |
1205 | */ | |
1206 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_FPM) | |
1207 | || CHECK_FLAG(dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1208 | return 0; | |
5adc2528 | 1209 | |
d62a17ae | 1210 | return 1; |
9fd92e3c AS |
1211 | } |
1212 | ||
1213 | /* | |
1214 | * rib_gc_dest | |
1215 | * | |
1216 | * Garbage collect the rib dest corresponding to the given route node | |
1217 | * if appropriate. | |
1218 | * | |
1219 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1220 | */ | |
d62a17ae | 1221 | int rib_gc_dest(struct route_node *rn) |
9fd92e3c | 1222 | { |
d62a17ae | 1223 | rib_dest_t *dest; |
9fd92e3c | 1224 | |
d62a17ae | 1225 | dest = rib_dest_from_rnode(rn); |
1226 | if (!dest) | |
1227 | return 0; | |
9fd92e3c | 1228 | |
d62a17ae | 1229 | if (!rib_can_delete_dest(dest)) |
1230 | return 0; | |
9fd92e3c | 1231 | |
c9abf558 DS |
1232 | if (IS_ZEBRA_DEBUG_RIB) { |
1233 | struct zebra_vrf *zvrf; | |
1234 | ||
1235 | zvrf = rib_dest_vrf(dest); | |
d62a17ae | 1236 | rnode_debug(rn, zvrf_id(zvrf), "removing dest from table"); |
c9abf558 | 1237 | } |
9fd92e3c | 1238 | |
d62a17ae | 1239 | dest->rnode = NULL; |
1240 | XFREE(MTYPE_RIB_DEST, dest); | |
1241 | rn->info = NULL; | |
9fd92e3c | 1242 | |
d62a17ae | 1243 | /* |
1244 | * Release the one reference that we keep on the route node. | |
1245 | */ | |
1246 | route_unlock_node(rn); | |
1247 | return 1; | |
9fd92e3c AS |
1248 | } |
1249 | ||
d62a17ae | 1250 | static void rib_process_add_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
1251 | struct route_entry *new) | |
3e5c6e00 | 1252 | { |
5f7a4718 DS |
1253 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
1254 | ||
d62a17ae | 1255 | hook_call(rib_update, rn, "new route selected"); |
3e5c6e00 | 1256 | |
d62a17ae | 1257 | /* Update real nexthop. This may actually determine if nexthop is active |
1258 | * or not. */ | |
0dddbf72 | 1259 | if (!nexthop_active_update(rn, new, true)) { |
d62a17ae | 1260 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
1261 | return; | |
1262 | } | |
3e5c6e00 | 1263 | |
d62a17ae | 1264 | if (IS_ZEBRA_DEBUG_RIB) { |
1265 | char buf[SRCDEST2STR_BUFFER]; | |
1266 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1267 | zlog_debug("%u:%s: Adding route rn %p, re %p (type %d)", | |
1268 | zvrf_id(zvrf), buf, rn, new, new->type); | |
1269 | } | |
3e5c6e00 | 1270 | |
d62a17ae | 1271 | /* If labeled-unicast route, install transit LSP. */ |
1272 | if (zebra_rib_labeled_unicast(new)) | |
1273 | zebra_mpls_lsp_install(zvrf, rn, new); | |
a64448ba | 1274 | |
0c555cc6 DS |
1275 | if (!RIB_SYSTEM_ROUTE(new)) |
1276 | rib_install_kernel(rn, new, NULL); | |
ed216282 DS |
1277 | else |
1278 | dest->selected_fib = new; | |
3e5c6e00 | 1279 | |
d62a17ae | 1280 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
3e5c6e00 | 1281 | } |
1282 | ||
d62a17ae | 1283 | static void rib_process_del_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
1284 | struct route_entry *old) | |
3e5c6e00 | 1285 | { |
5f7a4718 | 1286 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
d62a17ae | 1287 | hook_call(rib_update, rn, "removing existing route"); |
3e5c6e00 | 1288 | |
d62a17ae | 1289 | /* Uninstall from kernel. */ |
1290 | if (IS_ZEBRA_DEBUG_RIB) { | |
1291 | char buf[SRCDEST2STR_BUFFER]; | |
1292 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1293 | zlog_debug("%u:%s: Deleting route rn %p, re %p (type %d)", | |
1294 | zvrf_id(zvrf), buf, rn, old, old->type); | |
1295 | } | |
3e5c6e00 | 1296 | |
d62a17ae | 1297 | /* If labeled-unicast route, uninstall transit LSP. */ |
1298 | if (zebra_rib_labeled_unicast(old)) | |
1299 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
1300 | ||
1301 | if (!RIB_SYSTEM_ROUTE(old)) | |
1302 | rib_uninstall_kernel(rn, old); | |
ed216282 DS |
1303 | else { |
1304 | /* | |
1305 | * We are setting this to NULL here | |
1306 | * because that is what we traditionally | |
1307 | * have been doing. I am not positive | |
1308 | * that this is the right thing to do | |
1309 | * but let's leave the code alone | |
1310 | * for the RIB_SYSTEM_ROUTE case | |
1311 | */ | |
1312 | dest->selected_fib = NULL; | |
1313 | } | |
d62a17ae | 1314 | |
1315 | /* Update nexthop for route, reset changed flag. */ | |
ef57f35f DL |
1316 | /* Note: this code also handles the Linux case when an interface goes |
1317 | * down, causing the kernel to delete routes without sending DELROUTE | |
1318 | * notifications | |
1319 | */ | |
0dddbf72 | 1320 | if (!nexthop_active_update(rn, old, true) && |
212df1de PG |
1321 | (RIB_KERNEL_ROUTE(old))) |
1322 | SET_FLAG(old->status, ROUTE_ENTRY_REMOVED); | |
1323 | else | |
1324 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); | |
d62a17ae | 1325 | } |
1326 | ||
1327 | static void rib_process_update_fib(struct zebra_vrf *zvrf, | |
1328 | struct route_node *rn, | |
1329 | struct route_entry *old, | |
1330 | struct route_entry *new) | |
1331 | { | |
1332 | struct nexthop *nexthop = NULL; | |
1333 | int nh_active = 0; | |
5f7a4718 | 1334 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
d62a17ae | 1335 | |
1336 | /* | |
1337 | * We have to install or update if a new route has been selected or | |
1338 | * something has changed. | |
1339 | */ | |
1340 | if (new != old || CHECK_FLAG(new->status, ROUTE_ENTRY_CHANGED)) { | |
1341 | hook_call(rib_update, rn, "updating existing route"); | |
1342 | ||
1343 | /* Update the nexthop; we could determine here that nexthop is | |
1344 | * inactive. */ | |
0dddbf72 | 1345 | if (nexthop_active_update(rn, new, true)) |
d62a17ae | 1346 | nh_active = 1; |
1347 | ||
1348 | /* If nexthop is active, install the selected route, if | |
1349 | * appropriate. If | |
1350 | * the install succeeds, cleanup flags for prior route, if | |
1351 | * different from | |
1352 | * newly selected. | |
1353 | */ | |
1354 | if (nh_active) { | |
1355 | if (IS_ZEBRA_DEBUG_RIB) { | |
1356 | char buf[SRCDEST2STR_BUFFER]; | |
1357 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1358 | if (new != old) | |
1359 | zlog_debug( | |
1360 | "%u:%s: Updating route rn %p, re %p (type %d) " | |
1361 | "old %p (type %d)", | |
1362 | zvrf_id(zvrf), buf, rn, new, | |
1363 | new->type, old, old->type); | |
1364 | else | |
1365 | zlog_debug( | |
1366 | "%u:%s: Updating route rn %p, re %p (type %d)", | |
1367 | zvrf_id(zvrf), buf, rn, new, | |
1368 | new->type); | |
1369 | } | |
1370 | ||
1371 | /* If labeled-unicast route, uninstall transit LSP. */ | |
1372 | if (zebra_rib_labeled_unicast(old)) | |
1373 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
1374 | ||
1375 | /* Non-system route should be installed. */ | |
1376 | if (!RIB_SYSTEM_ROUTE(new)) { | |
1377 | /* If labeled-unicast route, install transit | |
1378 | * LSP. */ | |
1379 | if (zebra_rib_labeled_unicast(new)) | |
1380 | zebra_mpls_lsp_install(zvrf, rn, new); | |
1381 | ||
0c555cc6 | 1382 | rib_install_kernel(rn, new, old); |
ed216282 DS |
1383 | } else { |
1384 | /* | |
1385 | * We do not need to install the | |
1386 | * selected route because it | |
1387 | * is already isntalled by | |
1388 | * the system( ie not us ) | |
1389 | * so just mark it as winning | |
1390 | * we do need to ensure that | |
1391 | * if we uninstall a route | |
1392 | * from ourselves we don't | |
1393 | * over write this pointer | |
1394 | */ | |
1395 | dest->selected_fib = NULL; | |
d62a17ae | 1396 | } |
d62a17ae | 1397 | /* If install succeeded or system route, cleanup flags |
1398 | * for prior route. */ | |
ed216282 | 1399 | if (new != old) { |
d62a17ae | 1400 | if (RIB_SYSTEM_ROUTE(new)) { |
1401 | if (!RIB_SYSTEM_ROUTE(old)) | |
1402 | rib_uninstall_kernel(rn, old); | |
1403 | } else { | |
7ee30f28 | 1404 | for (nexthop = old->ng.nexthop; nexthop; |
d62a17ae | 1405 | nexthop = nexthop->next) |
1406 | UNSET_FLAG(nexthop->flags, | |
1407 | NEXTHOP_FLAG_FIB); | |
1408 | } | |
1409 | } | |
d62a17ae | 1410 | } |
a64448ba | 1411 | |
d62a17ae | 1412 | /* |
1413 | * If nexthop for selected route is not active or install | |
1414 | * failed, we | |
1415 | * may need to uninstall and delete for redistribution. | |
1416 | */ | |
ed216282 | 1417 | if (!nh_active) { |
d62a17ae | 1418 | if (IS_ZEBRA_DEBUG_RIB) { |
1419 | char buf[SRCDEST2STR_BUFFER]; | |
1420 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1421 | if (new != old) | |
1422 | zlog_debug( | |
1423 | "%u:%s: Deleting route rn %p, re %p (type %d) " | |
0cfbff74 | 1424 | "old %p (type %d) - nexthop inactive", |
d62a17ae | 1425 | zvrf_id(zvrf), buf, rn, new, |
0cfbff74 | 1426 | new->type, old, old->type); |
d62a17ae | 1427 | else |
1428 | zlog_debug( | |
0cfbff74 | 1429 | "%u:%s: Deleting route rn %p, re %p (type %d) - nexthop inactive", |
d62a17ae | 1430 | zvrf_id(zvrf), buf, rn, new, |
0cfbff74 | 1431 | new->type); |
d62a17ae | 1432 | } |
1433 | ||
1434 | /* If labeled-unicast route, uninstall transit LSP. */ | |
1435 | if (zebra_rib_labeled_unicast(old)) | |
1436 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
1437 | ||
1438 | if (!RIB_SYSTEM_ROUTE(old)) | |
1439 | rib_uninstall_kernel(rn, old); | |
ed216282 DS |
1440 | else |
1441 | dest->selected_fib = NULL; | |
d62a17ae | 1442 | } |
1443 | } else { | |
1444 | /* | |
1445 | * Same route selected; check if in the FIB and if not, | |
1446 | * re-install. This | |
1447 | * is housekeeping code to deal with race conditions in kernel | |
1448 | * with linux | |
1449 | * netlink reporting interface up before IPv4 or IPv6 protocol | |
1450 | * is ready | |
1451 | * to add routes. | |
1452 | */ | |
1453 | if (!RIB_SYSTEM_ROUTE(new)) { | |
ed216282 | 1454 | bool in_fib = false; |
d62a17ae | 1455 | |
7ee30f28 | 1456 | for (ALL_NEXTHOPS(new->ng, nexthop)) |
d62a17ae | 1457 | if (CHECK_FLAG(nexthop->flags, |
1458 | NEXTHOP_FLAG_FIB)) { | |
ed216282 | 1459 | in_fib = true; |
d62a17ae | 1460 | break; |
1461 | } | |
1462 | if (!in_fib) | |
1463 | rib_install_kernel(rn, new, NULL); | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | /* Update prior route. */ | |
1468 | if (new != old) { | |
d62a17ae | 1469 | /* Set real nexthop. */ |
0dddbf72 | 1470 | nexthop_active_update(rn, old, true); |
d62a17ae | 1471 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); |
1472 | } | |
3e5c6e00 | 1473 | |
d62a17ae | 1474 | /* Clear changed flag. */ |
1475 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); | |
3e5c6e00 | 1476 | } |
1477 | ||
d62a17ae | 1478 | /* Check if 'alternate' RIB entry is better than 'current'. */ |
1479 | static struct route_entry *rib_choose_best(struct route_entry *current, | |
1480 | struct route_entry *alternate) | |
1481 | { | |
1482 | if (current == NULL) | |
1483 | return alternate; | |
1484 | ||
1485 | /* filter route selection in following order: | |
1486 | * - connected beats other types | |
fec4ca19 | 1487 | * - if both connected, loopback or vrf wins |
d62a17ae | 1488 | * - lower distance beats higher |
1489 | * - lower metric beats higher for equal distance | |
1490 | * - last, hence oldest, route wins tie break. | |
1491 | */ | |
1492 | ||
fec4ca19 DS |
1493 | /* Connected routes. Check to see if either are a vrf |
1494 | * or loopback interface. If not, pick the last connected | |
d62a17ae | 1495 | * route of the set of lowest metric connected routes. |
1496 | */ | |
1497 | if (alternate->type == ZEBRA_ROUTE_CONNECT) { | |
fec4ca19 DS |
1498 | if (current->type != ZEBRA_ROUTE_CONNECT) |
1499 | return alternate; | |
1500 | ||
1501 | /* both are connected. are either loop or vrf? */ | |
1502 | struct nexthop *nexthop = NULL; | |
1503 | ||
1504 | for (ALL_NEXTHOPS(alternate->ng, nexthop)) { | |
1505 | if (if_is_loopback_or_vrf(if_lookup_by_index( | |
1506 | nexthop->ifindex, alternate->vrf_id))) | |
1507 | return alternate; | |
1508 | } | |
1509 | ||
1510 | for (ALL_NEXTHOPS(current->ng, nexthop)) { | |
1511 | if (if_is_loopback_or_vrf(if_lookup_by_index( | |
1512 | nexthop->ifindex, current->vrf_id))) | |
1513 | return current; | |
1514 | } | |
1515 | ||
1516 | /* Neither are loop or vrf so pick best metric */ | |
1517 | if (alternate->metric <= current->metric) | |
d62a17ae | 1518 | return alternate; |
1519 | ||
1520 | return current; | |
1521 | } | |
3e5c6e00 | 1522 | |
d62a17ae | 1523 | if (current->type == ZEBRA_ROUTE_CONNECT) |
1524 | return current; | |
3e5c6e00 | 1525 | |
d62a17ae | 1526 | /* higher distance loses */ |
1527 | if (alternate->distance < current->distance) | |
1528 | return alternate; | |
1529 | if (current->distance < alternate->distance) | |
1530 | return current; | |
3e5c6e00 | 1531 | |
d62a17ae | 1532 | /* metric tie-breaks equal distance */ |
1533 | if (alternate->metric <= current->metric) | |
1534 | return alternate; | |
3e5c6e00 | 1535 | |
d62a17ae | 1536 | return current; |
3e5c6e00 | 1537 | } |
1538 | ||
d62a17ae | 1539 | /* Core function for processing routing information base. */ |
1540 | static void rib_process(struct route_node *rn) | |
1541 | { | |
1542 | struct route_entry *re; | |
1543 | struct route_entry *next; | |
1544 | struct route_entry *old_selected = NULL; | |
1545 | struct route_entry *new_selected = NULL; | |
1546 | struct route_entry *old_fib = NULL; | |
1547 | struct route_entry *new_fib = NULL; | |
1548 | struct route_entry *best = NULL; | |
1549 | char buf[SRCDEST2STR_BUFFER]; | |
1550 | rib_dest_t *dest; | |
1551 | struct zebra_vrf *zvrf = NULL; | |
86391e56 MS |
1552 | const struct prefix *p, *src_p; |
1553 | ||
d62a17ae | 1554 | srcdest_rnode_prefixes(rn, &p, &src_p); |
1555 | vrf_id_t vrf_id = VRF_UNKNOWN; | |
1556 | ||
1557 | assert(rn); | |
1558 | ||
1559 | dest = rib_dest_from_rnode(rn); | |
1560 | if (dest) { | |
1561 | zvrf = rib_dest_vrf(dest); | |
1562 | vrf_id = zvrf_id(zvrf); | |
1563 | } | |
bab85d4f | 1564 | |
d62a17ae | 1565 | if (IS_ZEBRA_DEBUG_RIB) |
1566 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bab85d4f | 1567 | |
d62a17ae | 1568 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1569 | zlog_debug("%u:%s: Processing rn %p", vrf_id, buf, rn); | |
bab85d4f | 1570 | |
607425e5 DS |
1571 | /* |
1572 | * we can have rn's that have a NULL info pointer | |
1573 | * (dest). As such let's not let the deref happen | |
1574 | * additionally we know RNODE_FOREACH_RE_SAFE | |
1575 | * will not iterate so we are ok. | |
1576 | */ | |
1577 | if (dest) | |
1578 | old_fib = dest->selected_fib; | |
5f7a4718 | 1579 | |
a2addae8 | 1580 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 1581 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1582 | zlog_debug( | |
1583 | "%u:%s: Examine re %p (type %d) status %x flags %x " | |
1584 | "dist %d metric %d", | |
1585 | vrf_id, buf, re, re->type, re->status, | |
1586 | re->flags, re->distance, re->metric); | |
1587 | ||
1588 | UNSET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
1589 | ||
1590 | /* Currently selected re. */ | |
1591 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { | |
1592 | assert(old_selected == NULL); | |
1593 | old_selected = re; | |
1594 | } | |
bab85d4f | 1595 | |
d62a17ae | 1596 | /* Skip deleted entries from selection */ |
1597 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
1598 | continue; | |
1599 | ||
1600 | /* Skip unreachable nexthop. */ | |
1601 | /* This first call to nexthop_active_update is merely to | |
1602 | * determine if | |
1603 | * there's any change to nexthops associated with this RIB | |
1604 | * entry. Now, | |
1605 | * rib_process() can be invoked due to an external event such as | |
1606 | * link | |
1607 | * down or due to next-hop-tracking evaluation. In the latter | |
1608 | * case, | |
1609 | * a decision has already been made that the NHs have changed. | |
1610 | * So, no | |
1611 | * need to invoke a potentially expensive call again. Further, | |
1612 | * since | |
1613 | * the change might be in a recursive NH which is not caught in | |
1614 | * the nexthop_active_update() code. Thus, we might miss changes | |
1615 | * to | |
1616 | * recursive NHs. | |
1617 | */ | |
1618 | if (!CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED) | |
0dddbf72 | 1619 | && !nexthop_active_update(rn, re, false)) { |
d62a17ae | 1620 | if (re->type == ZEBRA_ROUTE_TABLE) { |
1621 | /* XXX: HERE BE DRAGONS!!!!! | |
1622 | * In all honesty, I have not yet figured out | |
1623 | * what this part | |
1624 | * does or why the ROUTE_ENTRY_CHANGED test | |
1625 | * above is correct | |
1626 | * or why we need to delete a route here, and | |
1627 | * also not whether | |
1628 | * this concerns both selected and fib route, or | |
1629 | * only selected | |
1630 | * or only fib */ | |
1631 | /* This entry was denied by the 'ip protocol | |
1632 | * table' route-map, we | |
1633 | * need to delete it */ | |
1634 | if (re != old_selected) { | |
1635 | if (IS_ZEBRA_DEBUG_RIB) | |
1636 | zlog_debug( | |
32391aff | 1637 | "%s: %u:%s: imported via import-table but denied " |
d62a17ae | 1638 | "by the ip protocol table route-map", |
32391aff | 1639 | __func__, vrf_id, buf); |
d62a17ae | 1640 | rib_unlink(rn, re); |
1641 | } else | |
1642 | SET_FLAG(re->status, | |
1643 | ROUTE_ENTRY_REMOVED); | |
1644 | } | |
1645 | ||
1646 | continue; | |
1647 | } | |
bab85d4f | 1648 | |
d62a17ae | 1649 | /* Infinite distance. */ |
1650 | if (re->distance == DISTANCE_INFINITY) { | |
1651 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
1652 | continue; | |
1653 | } | |
bab85d4f | 1654 | |
d62a17ae | 1655 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_FIB_OVERRIDE)) { |
1656 | best = rib_choose_best(new_fib, re); | |
1657 | if (new_fib && best != new_fib) | |
1658 | UNSET_FLAG(new_fib->status, | |
1659 | ROUTE_ENTRY_CHANGED); | |
1660 | new_fib = best; | |
1661 | } else { | |
1662 | best = rib_choose_best(new_selected, re); | |
1663 | if (new_selected && best != new_selected) | |
1664 | UNSET_FLAG(new_selected->status, | |
1665 | ROUTE_ENTRY_CHANGED); | |
1666 | new_selected = best; | |
1667 | } | |
1668 | if (best != re) | |
1669 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
1670 | } /* RNODE_FOREACH_RE */ | |
1671 | ||
1672 | /* If no FIB override route, use the selected route also for FIB */ | |
1673 | if (new_fib == NULL) | |
1674 | new_fib = new_selected; | |
1675 | ||
1676 | /* After the cycle is finished, the following pointers will be set: | |
1677 | * old_selected --- RE entry currently having SELECTED | |
1678 | * new_selected --- RE entry that is newly SELECTED | |
1679 | * old_fib --- RE entry currently in kernel FIB | |
1680 | * new_fib --- RE entry that is newly to be in kernel FIB | |
1681 | * | |
1682 | * new_selected will get SELECTED flag, and is going to be redistributed | |
1683 | * the zclients. new_fib (which can be new_selected) will be installed | |
1684 | * in kernel. | |
1685 | */ | |
1686 | ||
1687 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { | |
1688 | zlog_debug( | |
1689 | "%u:%s: After processing: old_selected %p new_selected %p old_fib %p new_fib %p", | |
1690 | vrf_id, buf, (void *)old_selected, (void *)new_selected, | |
1691 | (void *)old_fib, (void *)new_fib); | |
1692 | } | |
446bb95e | 1693 | |
d62a17ae | 1694 | /* Buffer ROUTE_ENTRY_CHANGED here, because it will get cleared if |
1695 | * fib == selected */ | |
9d303b37 DL |
1696 | bool selected_changed = new_selected && CHECK_FLAG(new_selected->status, |
1697 | ROUTE_ENTRY_CHANGED); | |
d62a17ae | 1698 | |
1699 | /* Update fib according to selection results */ | |
1700 | if (new_fib && old_fib) | |
1701 | rib_process_update_fib(zvrf, rn, old_fib, new_fib); | |
1702 | else if (new_fib) | |
1703 | rib_process_add_fib(zvrf, rn, new_fib); | |
1704 | else if (old_fib) | |
1705 | rib_process_del_fib(zvrf, rn, old_fib); | |
1706 | ||
8cb41cd6 | 1707 | /* Update SELECTED entry */ |
d62a17ae | 1708 | if (old_selected != new_selected || selected_changed) { |
93bdadae | 1709 | |
d62a17ae | 1710 | if (new_selected && new_selected != new_fib) { |
0dddbf72 | 1711 | nexthop_active_update(rn, new_selected, true); |
d62a17ae | 1712 | UNSET_FLAG(new_selected->status, ROUTE_ENTRY_CHANGED); |
1713 | } | |
41ec9222 | 1714 | |
5af4b346 MS |
1715 | if (new_selected) { |
1716 | SET_FLAG(new_selected->flags, ZEBRA_FLAG_SELECTED); | |
1717 | ||
1718 | /* Special case: new route is system route, so | |
1719 | * dataplane update will not be done - ensure we | |
1720 | * redistribute the route. | |
1721 | */ | |
1722 | if (RIB_SYSTEM_ROUTE(new_selected)) | |
1723 | redistribute_update(p, src_p, new_selected, | |
1724 | old_selected); | |
1725 | } | |
1726 | ||
d62a17ae | 1727 | if (old_selected) { |
1728 | if (!new_selected) | |
1729 | redistribute_delete(p, src_p, old_selected); | |
1730 | if (old_selected != new_selected) | |
1731 | UNSET_FLAG(old_selected->flags, | |
1732 | ZEBRA_FLAG_SELECTED); | |
f857321e | 1733 | } |
d62a17ae | 1734 | } |
3e5c6e00 | 1735 | |
d62a17ae | 1736 | /* Remove all RE entries queued for removal */ |
a2addae8 | 1737 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 1738 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { |
1739 | if (IS_ZEBRA_DEBUG_RIB) { | |
1740 | rnode_debug(rn, vrf_id, "rn %p, removing re %p", | |
1741 | (void *)rn, (void *)re); | |
1742 | } | |
1743 | rib_unlink(rn, re); | |
1744 | } | |
1745 | } | |
4d38fdb4 | 1746 | |
d62a17ae | 1747 | /* |
1748 | * Check if the dest can be deleted now. | |
1749 | */ | |
1750 | rib_gc_dest(rn); | |
e96f9203 DO |
1751 | } |
1752 | ||
e5ac2adf MS |
1753 | /* |
1754 | * Utility to match route with dplane context data | |
1755 | */ | |
1756 | static bool rib_route_match_ctx(const struct route_entry *re, | |
25779064 MS |
1757 | const struct zebra_dplane_ctx *ctx, |
1758 | bool is_update) | |
e5ac2adf MS |
1759 | { |
1760 | bool result = false; | |
1761 | ||
1762 | if (is_update) { | |
1763 | /* | |
1764 | * In 'update' case, we test info about the 'previous' or | |
1765 | * 'old' route | |
1766 | */ | |
1767 | if ((re->type == dplane_ctx_get_old_type(ctx)) && | |
1768 | (re->instance == dplane_ctx_get_old_instance(ctx))) { | |
1769 | result = true; | |
1770 | ||
1771 | /* TODO -- we're using this extra test, but it's not | |
1772 | * exactly clear why. | |
1773 | */ | |
1774 | if (re->type == ZEBRA_ROUTE_STATIC && | |
1775 | (re->distance != dplane_ctx_get_old_distance(ctx) || | |
1776 | re->tag != dplane_ctx_get_old_tag(ctx))) { | |
1777 | result = false; | |
1778 | } | |
1779 | } | |
1780 | ||
1781 | } else { | |
1782 | /* | |
1783 | * Ordinary, single-route case using primary context info | |
1784 | */ | |
1785 | if ((dplane_ctx_get_op(ctx) != DPLANE_OP_ROUTE_DELETE) && | |
1786 | CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
1787 | /* Skip route that's been deleted */ | |
1788 | goto done; | |
1789 | } | |
1790 | ||
1791 | if ((re->type == dplane_ctx_get_type(ctx)) && | |
1792 | (re->instance == dplane_ctx_get_instance(ctx))) { | |
1793 | result = true; | |
1794 | ||
1795 | /* TODO -- we're using this extra test, but it's not | |
1796 | * exactly clear why. | |
1797 | */ | |
1798 | if (re->type == ZEBRA_ROUTE_STATIC && | |
1799 | (re->distance != dplane_ctx_get_distance(ctx) || | |
1800 | re->tag != dplane_ctx_get_tag(ctx))) { | |
1801 | result = false; | |
1802 | } | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | done: | |
1807 | ||
1808 | return (result); | |
1809 | } | |
1810 | ||
1811 | /* | |
91f16812 | 1812 | * Route-update results processing after async dataplane update. |
e5ac2adf | 1813 | */ |
25779064 | 1814 | static void rib_process_after(struct zebra_dplane_ctx *ctx) |
e5ac2adf MS |
1815 | { |
1816 | struct route_table *table = NULL; | |
97f5b441 | 1817 | struct zebra_vrf *zvrf = NULL; |
e5ac2adf MS |
1818 | struct route_node *rn = NULL; |
1819 | struct route_entry *re = NULL, *old_re = NULL, *rib; | |
1820 | bool is_update = false; | |
f183e380 | 1821 | struct nexthop *nexthop, *ctx_nexthop; |
97f5b441 | 1822 | char dest_str[PREFIX_STRLEN] = ""; |
5709131c | 1823 | enum dplane_op_e op; |
e5ac2adf MS |
1824 | enum zebra_dplane_result status; |
1825 | const struct prefix *dest_pfx, *src_pfx; | |
1826 | ||
1827 | /* Locate rn and re(s) from ctx */ | |
1828 | ||
1829 | table = zebra_vrf_table_with_table_id(dplane_ctx_get_afi(ctx), | |
1830 | dplane_ctx_get_safi(ctx), | |
1831 | dplane_ctx_get_vrf(ctx), | |
1832 | dplane_ctx_get_table(ctx)); | |
1833 | if (table == NULL) { | |
1834 | if (IS_ZEBRA_DEBUG_DPLANE) { | |
fe2c53d4 | 1835 | zlog_debug("Failed to process dplane results: no table for afi %d, safi %d, vrf %u", |
e5ac2adf MS |
1836 | dplane_ctx_get_afi(ctx), |
1837 | dplane_ctx_get_safi(ctx), | |
1838 | dplane_ctx_get_vrf(ctx)); | |
1839 | } | |
1840 | goto done; | |
1841 | } | |
1842 | ||
97f5b441 MS |
1843 | zvrf = vrf_info_lookup(dplane_ctx_get_vrf(ctx)); |
1844 | ||
e5ac2adf MS |
1845 | dest_pfx = dplane_ctx_get_dest(ctx); |
1846 | ||
1847 | /* Note well: only capturing the prefix string if debug is enabled here; | |
1848 | * unconditional log messages will have to generate the string. | |
1849 | */ | |
5709131c | 1850 | if (IS_ZEBRA_DEBUG_DPLANE) |
e5ac2adf | 1851 | prefix2str(dest_pfx, dest_str, sizeof(dest_str)); |
e5ac2adf MS |
1852 | |
1853 | src_pfx = dplane_ctx_get_src(ctx); | |
1854 | rn = srcdest_rnode_get(table, dplane_ctx_get_dest(ctx), | |
5709131c | 1855 | src_pfx ? (struct prefix_ipv6 *)src_pfx : NULL); |
e5ac2adf MS |
1856 | if (rn == NULL) { |
1857 | if (IS_ZEBRA_DEBUG_DPLANE) { | |
fe2c53d4 | 1858 | zlog_debug("Failed to process dplane results: no route for %u:%s", |
e5ac2adf MS |
1859 | dplane_ctx_get_vrf(ctx), dest_str); |
1860 | } | |
1861 | goto done; | |
1862 | } | |
1863 | ||
1864 | srcdest_rnode_prefixes(rn, &dest_pfx, &src_pfx); | |
1865 | ||
1866 | op = dplane_ctx_get_op(ctx); | |
1867 | status = dplane_ctx_get_status(ctx); | |
1868 | ||
c831033f | 1869 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) |
f183e380 | 1870 | zlog_debug("%u:%s Processing dplane ctx %p, op %s result %s", |
e5ac2adf | 1871 | dplane_ctx_get_vrf(ctx), dest_str, ctx, |
f183e380 | 1872 | dplane_op2str(op), dplane_res2str(status)); |
e5ac2adf MS |
1873 | |
1874 | if (op == DPLANE_OP_ROUTE_DELETE) { | |
1875 | /* | |
1876 | * In the delete case, the zebra core datastructs were | |
1877 | * updated (or removed) at the time the delete was issued, | |
1878 | * so we're just notifying the route owner. | |
1879 | */ | |
1880 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
1881 | zsend_route_notify_owner_ctx(ctx, ZAPI_ROUTE_REMOVED); | |
97f5b441 | 1882 | |
5709131c | 1883 | if (zvrf) |
97f5b441 | 1884 | zvrf->removals++; |
e5ac2adf MS |
1885 | } else { |
1886 | zsend_route_notify_owner_ctx(ctx, | |
dba52387 | 1887 | ZAPI_ROUTE_REMOVE_FAIL); |
e5ac2adf MS |
1888 | |
1889 | zlog_warn("%u:%s: Route Deletion failure", | |
1890 | dplane_ctx_get_vrf(ctx), | |
1891 | prefix2str(dest_pfx, | |
1892 | dest_str, sizeof(dest_str))); | |
1893 | } | |
1894 | ||
1895 | /* Nothing more to do in delete case */ | |
1896 | goto done; | |
1897 | } | |
1898 | ||
1899 | /* | |
1900 | * Update is a bit of a special case, where we may have both old and new | |
1901 | * routes to post-process. | |
1902 | */ | |
1903 | is_update = dplane_ctx_is_update(ctx); | |
1904 | ||
1905 | /* | |
1906 | * Take a pass through the routes, look for matches with the context | |
1907 | * info. | |
1908 | */ | |
1909 | RNODE_FOREACH_RE(rn, rib) { | |
1910 | ||
1911 | if (re == NULL) { | |
5709131c | 1912 | if (rib_route_match_ctx(rib, ctx, false)) |
e5ac2adf | 1913 | re = rib; |
e5ac2adf MS |
1914 | } |
1915 | ||
1916 | /* Check for old route match */ | |
1917 | if (is_update && (old_re == NULL)) { | |
5709131c | 1918 | if (rib_route_match_ctx(rib, ctx, true /*is_update*/)) |
e5ac2adf | 1919 | old_re = rib; |
e5ac2adf MS |
1920 | } |
1921 | ||
1922 | /* Have we found the routes we need to work on? */ | |
5709131c | 1923 | if (re && ((!is_update || old_re))) |
e5ac2adf | 1924 | break; |
e5ac2adf MS |
1925 | } |
1926 | ||
1927 | /* | |
1928 | * Check sequence number(s) to detect stale results before continuing | |
1929 | */ | |
1930 | if (re && (re->dplane_sequence != dplane_ctx_get_seq(ctx))) { | |
1931 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) { | |
1932 | zlog_debug("%u:%s Stale dplane result for re %p", | |
1933 | dplane_ctx_get_vrf(ctx), dest_str, re); | |
1934 | } | |
1935 | re = NULL; | |
1936 | } | |
1937 | ||
1938 | if (old_re && | |
1939 | (old_re->dplane_sequence != dplane_ctx_get_old_seq(ctx))) { | |
1940 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) { | |
1941 | zlog_debug("%u:%s Stale dplane result for old_re %p", | |
1942 | dplane_ctx_get_vrf(ctx), dest_str, old_re); | |
1943 | } | |
1944 | old_re = NULL; | |
1945 | } | |
1946 | ||
1947 | /* | |
1948 | * Here's sort of a tough one: the route update result is stale. | |
1949 | * Is it better to use the context block info to generate | |
1950 | * redist and owner notification, or is it better to wait | |
1951 | * for the up-to-date result to arrive? | |
1952 | */ | |
1953 | if (re == NULL) { | |
1954 | /* TODO -- for now, only expose up-to-date results */ | |
1955 | goto done; | |
1956 | } | |
1957 | ||
1958 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
f183e380 MS |
1959 | /* Update zebra nexthop FIB flag for each |
1960 | * nexthop that was installed. | |
1961 | */ | |
1962 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), ctx_nexthop)) { | |
1963 | ||
1964 | for (ALL_NEXTHOPS(re->ng, nexthop)) { | |
1965 | if (nexthop_same(ctx_nexthop, nexthop)) | |
1966 | break; | |
1967 | } | |
1968 | ||
1969 | if (nexthop == NULL) | |
1970 | continue; | |
1971 | ||
e5ac2adf MS |
1972 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) |
1973 | continue; | |
1974 | ||
f183e380 MS |
1975 | if (CHECK_FLAG(ctx_nexthop->flags, |
1976 | NEXTHOP_FLAG_FIB)) | |
e5ac2adf MS |
1977 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
1978 | else | |
1979 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1980 | } | |
1981 | ||
f183e380 | 1982 | if (zvrf) { |
97f5b441 | 1983 | zvrf->installs++; |
f183e380 MS |
1984 | /* Set flag for nexthop tracking processing */ |
1985 | zvrf->flags |= ZEBRA_VRF_RIB_SCHEDULED; | |
1986 | } | |
97f5b441 | 1987 | |
e5ac2adf MS |
1988 | /* Redistribute */ |
1989 | /* TODO -- still calling the redist api using the route_entries, | |
1990 | * and there's a corner-case here: if there's no client | |
1991 | * for the 'new' route, a redist deleting the 'old' route | |
1992 | * will be sent. But if the 'old' context info was stale, | |
1993 | * 'old_re' will be NULL here and that delete will not be sent. | |
1994 | */ | |
1995 | redistribute_update(dest_pfx, src_pfx, re, old_re); | |
1996 | ||
1997 | /* Notify route owner */ | |
1998 | zsend_route_notify_owner(re, | |
1999 | dest_pfx, ZAPI_ROUTE_INSTALLED); | |
2000 | ||
2001 | } else { | |
2002 | zsend_route_notify_owner(re, dest_pfx, | |
2003 | ZAPI_ROUTE_FAIL_INSTALL); | |
2004 | ||
2005 | zlog_warn("%u:%s: Route install failed", | |
2006 | dplane_ctx_get_vrf(ctx), | |
2007 | prefix2str(dest_pfx, | |
2008 | dest_str, sizeof(dest_str))); | |
2009 | } | |
2010 | ||
2011 | done: | |
2012 | ||
2013 | /* Return context to dataplane module */ | |
2014 | dplane_ctx_fini(&ctx); | |
2015 | } | |
2016 | ||
5110a0c6 | 2017 | /* Take a list of route_node structs and return 1, if there was a record |
d62a17ae | 2018 | * picked from it and processed by rib_process(). Don't process more, |
5110a0c6 | 2019 | * than one RN record; operate only in the specified sub-queue. |
e96f9203 | 2020 | */ |
d7c0a89a | 2021 | static unsigned int process_subq(struct list *subq, uint8_t qindex) |
e96f9203 | 2022 | { |
d62a17ae | 2023 | struct listnode *lnode = listhead(subq); |
2024 | struct route_node *rnode; | |
2025 | rib_dest_t *dest; | |
2026 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 | 2027 | |
d62a17ae | 2028 | if (!lnode) |
2029 | return 0; | |
5110a0c6 | 2030 | |
d62a17ae | 2031 | rnode = listgetdata(lnode); |
2032 | dest = rib_dest_from_rnode(rnode); | |
2033 | if (dest) | |
2034 | zvrf = rib_dest_vrf(dest); | |
41ec9222 | 2035 | |
d62a17ae | 2036 | rib_process(rnode); |
5110a0c6 | 2037 | |
d62a17ae | 2038 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { |
2039 | char buf[SRCDEST2STR_BUFFER]; | |
2040 | srcdest_rnode2str(rnode, buf, sizeof(buf)); | |
2041 | zlog_debug("%u:%s: rn %p dequeued from sub-queue %u", | |
2042 | zvrf ? zvrf_id(zvrf) : 0, buf, rnode, qindex); | |
2043 | } | |
41ec9222 | 2044 | |
d62a17ae | 2045 | if (rnode->info) |
2046 | UNSET_FLAG(rib_dest_from_rnode(rnode)->flags, | |
2047 | RIB_ROUTE_QUEUED(qindex)); | |
9fd92e3c | 2048 | |
67b9467f | 2049 | #if 0 |
5110a0c6 SH |
2050 | else |
2051 | { | |
2052 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
2053 | __func__, rnode, rnode->lock); | |
2054 | zlog_backtrace(LOG_DEBUG); | |
2055 | } | |
67b9467f | 2056 | #endif |
d62a17ae | 2057 | route_unlock_node(rnode); |
2058 | list_delete_node(subq, lnode); | |
2059 | return 1; | |
e96f9203 DO |
2060 | } |
2061 | ||
fb018d25 | 2062 | /* |
f183e380 | 2063 | * Perform next-hop tracking processing after RIB updates. |
fb018d25 | 2064 | */ |
f183e380 | 2065 | static void do_nht_processing(void) |
fb018d25 | 2066 | { |
d62a17ae | 2067 | struct vrf *vrf; |
2068 | struct zebra_vrf *zvrf; | |
9ec6b0bb | 2069 | |
d62a17ae | 2070 | /* Evaluate nexthops for those VRFs which underwent route processing. |
2071 | * This | |
2072 | * should limit the evaluation to the necessary VRFs in most common | |
2073 | * situations. | |
2074 | */ | |
a2addae8 | 2075 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
d62a17ae | 2076 | zvrf = vrf->info; |
2077 | if (zvrf == NULL || !(zvrf->flags & ZEBRA_VRF_RIB_SCHEDULED)) | |
2078 | continue; | |
2079 | ||
f183e380 MS |
2080 | if (IS_ZEBRA_DEBUG_RIB_DETAILED || IS_ZEBRA_DEBUG_NHT) |
2081 | zlog_debug("NHT processing check for zvrf %s", | |
2082 | zvrf_name(zvrf)); | |
2083 | ||
d62a17ae | 2084 | zvrf->flags &= ~ZEBRA_VRF_RIB_SCHEDULED; |
6d53d7b1 | 2085 | zebra_evaluate_rnh(zvrf, AF_INET, 0, RNH_NEXTHOP_TYPE, NULL); |
2086 | zebra_evaluate_rnh(zvrf, AF_INET, 0, RNH_IMPORT_CHECK_TYPE, | |
d62a17ae | 2087 | NULL); |
6d53d7b1 | 2088 | zebra_evaluate_rnh(zvrf, AF_INET6, 0, RNH_NEXTHOP_TYPE, NULL); |
2089 | zebra_evaluate_rnh(zvrf, AF_INET6, 0, RNH_IMPORT_CHECK_TYPE, | |
d62a17ae | 2090 | NULL); |
d62a17ae | 2091 | } |
939fba27 | 2092 | |
d62a17ae | 2093 | /* Schedule LSPs for processing, if needed. */ |
2094 | zvrf = vrf_info_lookup(VRF_DEFAULT); | |
2095 | if (mpls_should_lsps_be_processed(zvrf)) { | |
2096 | if (IS_ZEBRA_DEBUG_MPLS) | |
2097 | zlog_debug( | |
2098 | "%u: Scheduling all LSPs upon RIB completion", | |
2099 | zvrf_id(zvrf)); | |
2100 | zebra_mpls_lsp_schedule(zvrf); | |
2101 | mpls_unmark_lsps_for_processing(zvrf); | |
2102 | } | |
fb018d25 DS |
2103 | } |
2104 | ||
f183e380 MS |
2105 | /* |
2106 | * All meta queues have been processed. Trigger next-hop evaluation. | |
2107 | */ | |
2108 | static void meta_queue_process_complete(struct work_queue *dummy) | |
2109 | { | |
2110 | do_nht_processing(); | |
2111 | } | |
2112 | ||
e96f9203 | 2113 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
d62a17ae | 2114 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and |
2115 | * data | |
e96f9203 DO |
2116 | * is pointed to the meta queue structure. |
2117 | */ | |
d62a17ae | 2118 | static wq_item_status meta_queue_process(struct work_queue *dummy, void *data) |
e96f9203 | 2119 | { |
d62a17ae | 2120 | struct meta_queue *mq = data; |
2121 | unsigned i; | |
91f16812 MS |
2122 | uint32_t queue_len, queue_limit; |
2123 | ||
2124 | /* Ensure there's room for more dataplane updates */ | |
2125 | queue_limit = dplane_get_in_queue_limit(); | |
2126 | queue_len = dplane_get_in_queue_len(); | |
2127 | if (queue_len > queue_limit) { | |
2128 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
8b962e77 MS |
2129 | zlog_debug("rib queue: dplane queue len %u, limit %u, retrying", |
2130 | queue_len, queue_limit); | |
91f16812 MS |
2131 | |
2132 | /* Ensure that the meta-queue is actually enqueued */ | |
2133 | if (work_queue_empty(zebrad.ribq)) | |
2134 | work_queue_add(zebrad.ribq, zebrad.mq); | |
2135 | ||
2136 | return WQ_QUEUE_BLOCKED; | |
2137 | } | |
5110a0c6 | 2138 | |
d62a17ae | 2139 | for (i = 0; i < MQ_SIZE; i++) |
2140 | if (process_subq(mq->subq[i], i)) { | |
2141 | mq->size--; | |
2142 | break; | |
2143 | } | |
2144 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; | |
e96f9203 DO |
2145 | } |
2146 | ||
5110a0c6 SH |
2147 | /* Look into the RN and queue it into one or more priority queues, |
2148 | * increasing the size for each data push done. | |
e96f9203 | 2149 | */ |
d62a17ae | 2150 | static void rib_meta_queue_add(struct meta_queue *mq, struct route_node *rn) |
e96f9203 | 2151 | { |
d62a17ae | 2152 | struct route_entry *re; |
5110a0c6 | 2153 | |
a2addae8 | 2154 | RNODE_FOREACH_RE (rn, re) { |
73547a75 | 2155 | uint8_t qindex = route_info[re->type].meta_q_map; |
d62a17ae | 2156 | struct zebra_vrf *zvrf; |
2157 | ||
2158 | /* Invariant: at this point we always have rn->info set. */ | |
2159 | if (CHECK_FLAG(rib_dest_from_rnode(rn)->flags, | |
2160 | RIB_ROUTE_QUEUED(qindex))) { | |
2161 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2162 | rnode_debug( | |
2163 | rn, re->vrf_id, | |
2164 | "rn %p is already queued in sub-queue %u", | |
2165 | (void *)rn, qindex); | |
2166 | continue; | |
2167 | } | |
5110a0c6 | 2168 | |
d62a17ae | 2169 | SET_FLAG(rib_dest_from_rnode(rn)->flags, |
2170 | RIB_ROUTE_QUEUED(qindex)); | |
2171 | listnode_add(mq->subq[qindex], rn); | |
2172 | route_lock_node(rn); | |
2173 | mq->size++; | |
5110a0c6 | 2174 | |
d62a17ae | 2175 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2176 | rnode_debug(rn, re->vrf_id, | |
2177 | "queued rn %p into sub-queue %u", | |
2178 | (void *)rn, qindex); | |
9ec6b0bb | 2179 | |
d62a17ae | 2180 | zvrf = zebra_vrf_lookup_by_id(re->vrf_id); |
2181 | if (zvrf) | |
2182 | zvrf->flags |= ZEBRA_VRF_RIB_SCHEDULED; | |
2183 | } | |
4d38fdb4 | 2184 | } |
2185 | ||
6d691129 | 2186 | /* Add route_node to work queue and schedule processing */ |
d62a17ae | 2187 | void rib_queue_add(struct route_node *rn) |
4d38fdb4 | 2188 | { |
d62a17ae | 2189 | assert(rn); |
fc328ac9 | 2190 | |
d62a17ae | 2191 | /* Pointless to queue a route_node with no RIB entries to add or remove |
2192 | */ | |
2193 | if (!rnode_to_ribs(rn)) { | |
2194 | zlog_debug("%s: called for route_node (%p, %d) with no ribs", | |
2195 | __func__, (void *)rn, rn->lock); | |
2196 | zlog_backtrace(LOG_DEBUG); | |
2197 | return; | |
2198 | } | |
4d38fdb4 | 2199 | |
d62a17ae | 2200 | if (zebrad.ribq == NULL) { |
e914ccbe | 2201 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2202 | "%s: work_queue does not exist!", __func__); |
d62a17ae | 2203 | return; |
2204 | } | |
2205 | ||
2206 | /* | |
2207 | * The RIB queue should normally be either empty or holding the only | |
2208 | * work_queue_item element. In the latter case this element would | |
2209 | * hold a pointer to the meta queue structure, which must be used to | |
2210 | * actually queue the route nodes to process. So create the MQ | |
2211 | * holder, if necessary, then push the work into it in any case. | |
2212 | * This semantics was introduced after 0.99.9 release. | |
2213 | */ | |
f104f6c1 | 2214 | if (work_queue_empty(zebrad.ribq)) |
d62a17ae | 2215 | work_queue_add(zebrad.ribq, zebrad.mq); |
e96f9203 | 2216 | |
d62a17ae | 2217 | rib_meta_queue_add(zebrad.mq, rn); |
fc328ac9 | 2218 | |
d62a17ae | 2219 | return; |
4d38fdb4 | 2220 | } |
2221 | ||
5110a0c6 SH |
2222 | /* Create new meta queue. |
2223 | A destructor function doesn't seem to be necessary here. | |
2224 | */ | |
d62a17ae | 2225 | static struct meta_queue *meta_queue_new(void) |
e96f9203 | 2226 | { |
d62a17ae | 2227 | struct meta_queue *new; |
2228 | unsigned i; | |
5110a0c6 | 2229 | |
d62a17ae | 2230 | new = XCALLOC(MTYPE_WORK_QUEUE, sizeof(struct meta_queue)); |
e96f9203 | 2231 | |
d62a17ae | 2232 | for (i = 0; i < MQ_SIZE; i++) { |
2233 | new->subq[i] = list_new(); | |
2234 | assert(new->subq[i]); | |
2235 | } | |
5110a0c6 | 2236 | |
d62a17ae | 2237 | return new; |
e96f9203 DO |
2238 | } |
2239 | ||
d62a17ae | 2240 | void meta_queue_free(struct meta_queue *mq) |
5a8dfcd8 | 2241 | { |
d62a17ae | 2242 | unsigned i; |
5a8dfcd8 | 2243 | |
d62a17ae | 2244 | for (i = 0; i < MQ_SIZE; i++) |
6a154c88 | 2245 | list_delete(&mq->subq[i]); |
5a8dfcd8 | 2246 | |
d62a17ae | 2247 | XFREE(MTYPE_WORK_QUEUE, mq); |
5a8dfcd8 RW |
2248 | } |
2249 | ||
4d38fdb4 | 2250 | /* initialise zebra rib work queue */ |
d62a17ae | 2251 | static void rib_queue_init(struct zebra_t *zebra) |
4d38fdb4 | 2252 | { |
d62a17ae | 2253 | assert(zebra); |
2254 | ||
2255 | if (!(zebra->ribq = | |
2256 | work_queue_new(zebra->master, "route_node processing"))) { | |
e914ccbe | 2257 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2258 | "%s: could not initialise work queue!", __func__); |
d62a17ae | 2259 | return; |
2260 | } | |
4d38fdb4 | 2261 | |
d62a17ae | 2262 | /* fill in the work queue spec */ |
2263 | zebra->ribq->spec.workfunc = &meta_queue_process; | |
2264 | zebra->ribq->spec.errorfunc = NULL; | |
2265 | zebra->ribq->spec.completion_func = &meta_queue_process_complete; | |
2266 | /* XXX: TODO: These should be runtime configurable via vty */ | |
2267 | zebra->ribq->spec.max_retries = 3; | |
3a30f50f | 2268 | zebra->ribq->spec.hold = ZEBRA_RIB_PROCESS_HOLD_TIME; |
6dd7b848 | 2269 | zebra->ribq->spec.retry = ZEBRA_RIB_PROCESS_RETRY_TIME; |
d62a17ae | 2270 | |
2271 | if (!(zebra->mq = meta_queue_new())) { | |
e914ccbe | 2272 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2273 | "%s: could not initialise meta queue!", __func__); |
d62a17ae | 2274 | return; |
2275 | } | |
2276 | return; | |
718e3744 | 2277 | } |
2278 | ||
6d691129 PJ |
2279 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2280 | * | |
2281 | * The queue length is bounded by the maximal size of the routing table, | |
2282 | * as a route_node will not be requeued, if already queued. | |
2283 | * | |
f0f77c9a DS |
2284 | * REs are submitted via rib_addnode or rib_delnode which set minimal |
2285 | * state, or static_install_route (when an existing RE is updated) | |
3c0755dc | 2286 | * and then submit route_node to queue for best-path selection later. |
f0f77c9a | 2287 | * Order of add/delete state changes are preserved for any given RE. |
6d691129 | 2288 | * |
f0f77c9a | 2289 | * Deleted REs are reaped during best-path selection. |
6d691129 PJ |
2290 | * |
2291 | * rib_addnode | |
f0f77c9a DS |
2292 | * |-> rib_link or unset ROUTE_ENTRY_REMOVE |->Update kernel with |
2293 | * |-------->| | best RE, if required | |
3c0755dc PJ |
2294 | * | | |
2295 | * static_install->|->rib_addqueue...... -> rib_process | |
2296 | * | | | |
2297 | * |-------->| |-> rib_unlink | |
f0f77c9a DS |
2298 | * |-> set ROUTE_ENTRY_REMOVE | |
2299 | * rib_delnode (RE freed) | |
6d691129 | 2300 | * |
9fd92e3c AS |
2301 | * The 'info' pointer of a route_node points to a rib_dest_t |
2302 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2303 | * dest is created on-demand by rib_link() and is kept around at least | |
2304 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
d62a17ae | 2305 | * |
6d691129 PJ |
2306 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): |
2307 | * | |
2308 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2309 | * - dest attached to route_node: |
2310 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2311 | * - route_node processing queue |
2312 | * - managed by: rib_addqueue, rib_process. | |
2313 | * | |
2314 | */ | |
d62a17ae | 2315 | |
f0f77c9a | 2316 | /* Add RE to head of the route node. */ |
d62a17ae | 2317 | static void rib_link(struct route_node *rn, struct route_entry *re, int process) |
2318 | { | |
2319 | struct route_entry *head; | |
2320 | rib_dest_t *dest; | |
2321 | afi_t afi; | |
2322 | const char *rmap_name; | |
9fd92e3c | 2323 | |
d62a17ae | 2324 | assert(re && rn); |
9fd92e3c | 2325 | |
d62a17ae | 2326 | dest = rib_dest_from_rnode(rn); |
2327 | if (!dest) { | |
2328 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2329 | rnode_debug(rn, re->vrf_id, "rn %p adding dest", rn); | |
7a4bb9c5 | 2330 | |
d62a17ae | 2331 | dest = XCALLOC(MTYPE_RIB_DEST, sizeof(rib_dest_t)); |
2332 | route_lock_node(rn); /* rn route table reference */ | |
2333 | rn->info = dest; | |
2334 | dest->rnode = rn; | |
2335 | } | |
2263a412 | 2336 | |
d62a17ae | 2337 | head = dest->routes; |
2338 | if (head) { | |
2339 | head->prev = re; | |
2340 | } | |
2341 | re->next = head; | |
2342 | dest->routes = re; | |
2343 | ||
2344 | afi = (rn->p.family == AF_INET) | |
2345 | ? AFI_IP | |
2346 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2347 | if (is_zebra_import_table_enabled(afi, re->table)) { | |
2348 | rmap_name = zebra_get_import_table_route_map(afi, re->table); | |
2349 | zebra_add_import_table_entry(rn, re, rmap_name); | |
2350 | } else if (process) | |
2351 | rib_queue_add(rn); | |
2352 | } | |
2353 | ||
7e24fdf3 DS |
2354 | static void rib_addnode(struct route_node *rn, |
2355 | struct route_entry *re, int process) | |
d62a17ae | 2356 | { |
2357 | /* RE node has been un-removed before route-node is processed. | |
2358 | * route_node must hence already be on the queue for processing.. | |
2359 | */ | |
2360 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
2361 | if (IS_ZEBRA_DEBUG_RIB) | |
2362 | rnode_debug(rn, re->vrf_id, "rn %p, un-removed re %p", | |
2363 | (void *)rn, (void *)re); | |
2364 | ||
2365 | UNSET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2366 | return; | |
2367 | } | |
2368 | rib_link(rn, re, process); | |
6d691129 PJ |
2369 | } |
2370 | ||
9fd92e3c AS |
2371 | /* |
2372 | * rib_unlink | |
2373 | * | |
2374 | * Detach a rib structure from a route_node. | |
2375 | * | |
2376 | * Note that a call to rib_unlink() should be followed by a call to | |
2377 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2378 | * longer required to be deleted. | |
2379 | */ | |
d62a17ae | 2380 | void rib_unlink(struct route_node *rn, struct route_entry *re) |
6d691129 | 2381 | { |
d62a17ae | 2382 | rib_dest_t *dest; |
9fd92e3c | 2383 | |
d62a17ae | 2384 | assert(rn && re); |
6d691129 | 2385 | |
d62a17ae | 2386 | if (IS_ZEBRA_DEBUG_RIB) |
2387 | rnode_debug(rn, re->vrf_id, "rn %p, re %p", (void *)rn, | |
2388 | (void *)re); | |
6d691129 | 2389 | |
d62a17ae | 2390 | dest = rib_dest_from_rnode(rn); |
6d691129 | 2391 | |
d62a17ae | 2392 | if (re->next) |
2393 | re->next->prev = re->prev; | |
6d691129 | 2394 | |
d62a17ae | 2395 | if (re->prev) |
2396 | re->prev->next = re->next; | |
2397 | else { | |
2398 | dest->routes = re->next; | |
2399 | } | |
7a4bb9c5 | 2400 | |
2eb07de3 DS |
2401 | if (dest->selected_fib == re) |
2402 | dest->selected_fib = NULL; | |
2403 | ||
7ee30f28 | 2404 | nexthops_free(re->ng.nexthop); |
d62a17ae | 2405 | XFREE(MTYPE_RE, re); |
2406 | } | |
2407 | ||
2408 | void rib_delnode(struct route_node *rn, struct route_entry *re) | |
2409 | { | |
2410 | afi_t afi; | |
2411 | ||
2412 | if (IS_ZEBRA_DEBUG_RIB) | |
2413 | rnode_debug(rn, re->vrf_id, "rn %p, re %p, removing", | |
2414 | (void *)rn, (void *)re); | |
2415 | SET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2416 | ||
2417 | afi = (rn->p.family == AF_INET) | |
2418 | ? AFI_IP | |
2419 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2420 | if (is_zebra_import_table_enabled(afi, re->table)) { | |
2421 | zebra_del_import_table_entry(rn, re); | |
2422 | /* Just clean up if non main table */ | |
2423 | if (IS_ZEBRA_DEBUG_RIB) { | |
2424 | char buf[SRCDEST2STR_BUFFER]; | |
2425 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
2426 | zlog_debug( | |
2427 | "%u:%s: Freeing route rn %p, re %p (type %d)", | |
2428 | re->vrf_id, buf, rn, re, re->type); | |
2429 | } | |
7a4bb9c5 | 2430 | |
d62a17ae | 2431 | rib_unlink(rn, re); |
2432 | } else { | |
2433 | rib_queue_add(rn); | |
2434 | } | |
718e3744 | 2435 | } |
2436 | ||
f0f77c9a | 2437 | /* This function dumps the contents of a given RE entry into |
dc95824a DO |
2438 | * standard debug log. Calling function name and IP prefix in |
2439 | * question are passed as 1st and 2nd arguments. | |
2440 | */ | |
2441 | ||
d62a17ae | 2442 | void _route_entry_dump(const char *func, union prefixconstptr pp, |
2443 | union prefixconstptr src_pp, | |
2444 | const struct route_entry *re) | |
2445 | { | |
d62a17ae | 2446 | const struct prefix *src_p = src_pp.p; |
2447 | bool is_srcdst = src_p && src_p->prefixlen; | |
2448 | char straddr[PREFIX_STRLEN]; | |
2449 | char srcaddr[PREFIX_STRLEN]; | |
2450 | struct nexthop *nexthop; | |
2451 | ||
2452 | zlog_debug("%s: dumping RE entry %p for %s%s%s vrf %u", func, | |
2453 | (const void *)re, prefix2str(pp, straddr, sizeof(straddr)), | |
2454 | is_srcdst ? " from " : "", | |
2455 | is_srcdst ? prefix2str(src_pp, srcaddr, sizeof(srcaddr)) | |
2456 | : "", | |
2457 | re->vrf_id); | |
cc54cfee RW |
2458 | zlog_debug("%s: uptime == %lu, type == %u, instance == %d, table == %d", |
2459 | func, (unsigned long)re->uptime, re->type, re->instance, | |
2460 | re->table); | |
d62a17ae | 2461 | zlog_debug( |
2462 | "%s: metric == %u, mtu == %u, distance == %u, flags == %u, status == %u", | |
2463 | func, re->metric, re->mtu, re->distance, re->flags, re->status); | |
2464 | zlog_debug("%s: nexthop_num == %u, nexthop_active_num == %u", func, | |
2465 | re->nexthop_num, re->nexthop_active_num); | |
2466 | ||
7ee30f28 | 2467 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
2d68a0f2 DS |
2468 | struct interface *ifp; |
2469 | struct vrf *vrf = vrf_lookup_by_id(nexthop->vrf_id); | |
2470 | ||
2471 | switch (nexthop->type) { | |
2472 | case NEXTHOP_TYPE_BLACKHOLE: | |
2473 | sprintf(straddr, "Blackhole"); | |
2474 | break; | |
2475 | case NEXTHOP_TYPE_IFINDEX: | |
2476 | ifp = if_lookup_by_index(nexthop->ifindex, | |
2477 | nexthop->vrf_id); | |
2478 | sprintf(straddr, "%s", ifp ? ifp->name : "Unknown"); | |
2479 | break; | |
2480 | case NEXTHOP_TYPE_IPV4: | |
2481 | /* fallthrough */ | |
2482 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
2483 | inet_ntop(AF_INET, &nexthop->gate, straddr, | |
2484 | INET6_ADDRSTRLEN); | |
2485 | break; | |
2486 | case NEXTHOP_TYPE_IPV6: | |
2487 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
2488 | inet_ntop(AF_INET6, &nexthop->gate, straddr, | |
2489 | INET6_ADDRSTRLEN); | |
2490 | break; | |
2491 | } | |
2492 | zlog_debug("%s: %s %s[%u] vrf %s(%u) with flags %s%s%s", func, | |
d62a17ae | 2493 | (nexthop->rparent ? " NH" : "NH"), straddr, |
2d68a0f2 DS |
2494 | nexthop->ifindex, vrf ? vrf->name : "Unknown", |
2495 | nexthop->vrf_id, | |
d62a17ae | 2496 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE) |
2497 | ? "ACTIVE " | |
2498 | : ""), | |
2499 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB) | |
2500 | ? "FIB " | |
2501 | : ""), | |
2502 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE) | |
2503 | ? "RECURSIVE" | |
2504 | : "")); | |
2505 | } | |
2506 | zlog_debug("%s: dump complete", func); | |
dc95824a DO |
2507 | } |
2508 | ||
2509 | /* This is an exported helper to rtm_read() to dump the strange | |
f0f77c9a | 2510 | * RE entry found by rib_lookup_ipv4_route() |
dc95824a DO |
2511 | */ |
2512 | ||
d62a17ae | 2513 | void rib_lookup_and_dump(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
2514 | { | |
2515 | struct route_table *table; | |
2516 | struct route_node *rn; | |
2517 | struct route_entry *re; | |
2518 | char prefix_buf[INET_ADDRSTRLEN]; | |
2519 | ||
2520 | /* Lookup table. */ | |
2521 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
2522 | if (!table) { | |
e914ccbe | 2523 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
1c50c1c0 QY |
2524 | "%s:%u zebra_vrf_table() returned NULL", __func__, |
2525 | vrf_id); | |
d62a17ae | 2526 | return; |
2527 | } | |
2528 | ||
2529 | /* Scan the RIB table for exactly matching RE entry. */ | |
2530 | rn = route_node_lookup(table, (struct prefix *)p); | |
2531 | ||
2532 | /* No route for this prefix. */ | |
2533 | if (!rn) { | |
32391aff | 2534 | zlog_debug("%s:%u lookup failed for %s", __func__, vrf_id, |
d62a17ae | 2535 | prefix2str((struct prefix *)p, prefix_buf, |
2536 | sizeof(prefix_buf))); | |
2537 | return; | |
2538 | } | |
2539 | ||
2540 | /* Unlock node. */ | |
2541 | route_unlock_node(rn); | |
2542 | ||
2543 | /* let's go */ | |
a2addae8 | 2544 | RNODE_FOREACH_RE (rn, re) { |
32391aff DS |
2545 | zlog_debug("%s:%u rn %p, re %p: %s, %s", |
2546 | __func__, vrf_id, | |
2547 | (void *)rn, (void *)re, | |
d62a17ae | 2548 | (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED) |
2549 | ? "removed" | |
2550 | : "NOT removed"), | |
2551 | (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED) | |
2552 | ? "selected" | |
2553 | : "NOT selected")); | |
2554 | route_entry_dump(p, NULL, re); | |
2555 | } | |
dc95824a DO |
2556 | } |
2557 | ||
20e5ff0a DO |
2558 | /* Check if requested address assignment will fail due to another |
2559 | * route being installed by zebra in FIB already. Take necessary | |
2560 | * actions, if needed: remove such a route from FIB and deSELECT | |
f0f77c9a | 2561 | * corresponding RE entry. Then put affected RN into RIBQ head. |
20e5ff0a | 2562 | */ |
d62a17ae | 2563 | void rib_lookup_and_pushup(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
2564 | { | |
2565 | struct route_table *table; | |
2566 | struct route_node *rn; | |
d62a17ae | 2567 | unsigned changed = 0; |
5f7a4718 | 2568 | rib_dest_t *dest; |
d62a17ae | 2569 | |
2570 | if (NULL == (table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id))) { | |
e914ccbe | 2571 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
1c50c1c0 QY |
2572 | "%s:%u zebra_vrf_table() returned NULL", __func__, |
2573 | vrf_id); | |
d62a17ae | 2574 | return; |
2575 | } | |
2576 | ||
2577 | /* No matches would be the simplest case. */ | |
2578 | if (NULL == (rn = route_node_lookup(table, (struct prefix *)p))) | |
2579 | return; | |
2580 | ||
2581 | /* Unlock node. */ | |
2582 | route_unlock_node(rn); | |
2583 | ||
5f7a4718 | 2584 | dest = rib_dest_from_rnode(rn); |
d62a17ae | 2585 | /* Check all RE entries. In case any changes have to be done, requeue |
2586 | * the RN into RIBQ head. If the routing message about the new connected | |
2587 | * route (generated by the IP address we are going to assign very soon) | |
2588 | * comes before the RIBQ is processed, the new RE entry will join | |
2589 | * RIBQ record already on head. This is necessary for proper | |
2590 | * revalidation | |
2591 | * of the rest of the RE. | |
2592 | */ | |
5f7a4718 DS |
2593 | if (dest->selected_fib && !RIB_SYSTEM_ROUTE(dest->selected_fib)) { |
2594 | changed = 1; | |
2595 | if (IS_ZEBRA_DEBUG_RIB) { | |
2596 | char buf[PREFIX_STRLEN]; | |
2597 | ||
2598 | zlog_debug("%u:%s: freeing way for connected prefix", | |
2599 | dest->selected_fib->vrf_id, | |
2600 | prefix2str(&rn->p, buf, sizeof(buf))); | |
2601 | route_entry_dump(&rn->p, NULL, dest->selected_fib); | |
d62a17ae | 2602 | } |
5f7a4718 | 2603 | rib_uninstall(rn, dest->selected_fib); |
d62a17ae | 2604 | } |
2605 | if (changed) | |
2606 | rib_queue_add(rn); | |
20e5ff0a DO |
2607 | } |
2608 | ||
d62a17ae | 2609 | int rib_add_multipath(afi_t afi, safi_t safi, struct prefix *p, |
2610 | struct prefix_ipv6 *src_p, struct route_entry *re) | |
718e3744 | 2611 | { |
d62a17ae | 2612 | struct route_table *table; |
2613 | struct route_node *rn; | |
40ecd8e4 | 2614 | struct route_entry *same = NULL; |
d62a17ae | 2615 | struct nexthop *nexthop; |
2616 | int ret = 0; | |
b4c034b0 | 2617 | |
d62a17ae | 2618 | if (!re) |
2619 | return 0; | |
b4c034b0 | 2620 | |
1f610a1f | 2621 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
05737783 | 2622 | |
d62a17ae | 2623 | /* Lookup table. */ |
7865c65d RW |
2624 | table = zebra_vrf_table_with_table_id(afi, safi, re->vrf_id, re->table); |
2625 | if (!table) { | |
2626 | XFREE(MTYPE_RE, re); | |
d62a17ae | 2627 | return 0; |
7865c65d | 2628 | } |
cddf391b | 2629 | |
d62a17ae | 2630 | /* Make it sure prefixlen is applied to the prefix. */ |
2631 | apply_mask(p); | |
2632 | if (src_p) | |
2633 | apply_mask_ipv6(src_p); | |
718e3744 | 2634 | |
d62a17ae | 2635 | /* Set default distance by route type. */ |
2636 | if (re->distance == 0) { | |
0492eea0 | 2637 | re->distance = route_distance(re->type); |
718e3744 | 2638 | |
d62a17ae | 2639 | /* iBGP distance is 200. */ |
2640 | if (re->type == ZEBRA_ROUTE_BGP | |
2641 | && CHECK_FLAG(re->flags, ZEBRA_FLAG_IBGP)) | |
2642 | re->distance = 200; | |
2643 | } | |
718e3744 | 2644 | |
d62a17ae | 2645 | /* Lookup route node.*/ |
2646 | rn = srcdest_rnode_get(table, p, src_p); | |
718e3744 | 2647 | |
40ecd8e4 DS |
2648 | /* |
2649 | * If same type of route are installed, treat it as a implicit | |
2650 | * withdraw. | |
2651 | * If the user has specified the No route replace semantics | |
2652 | * for the install don't do a route replace. | |
2653 | */ | |
a2addae8 | 2654 | RNODE_FOREACH_RE (rn, same) { |
d62a17ae | 2655 | if (CHECK_FLAG(same->status, ROUTE_ENTRY_REMOVED)) |
2656 | continue; | |
41ec9222 | 2657 | |
eb327fa5 RW |
2658 | if (same->type != re->type) |
2659 | continue; | |
2660 | if (same->instance != re->instance) | |
2661 | continue; | |
996c9314 LB |
2662 | if (same->type == ZEBRA_ROUTE_KERNEL |
2663 | && same->metric != re->metric) | |
eb327fa5 | 2664 | continue; |
40ecd8e4 DS |
2665 | |
2666 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_RR_USE_DISTANCE) && | |
2667 | same->distance != re->distance) | |
2668 | continue; | |
2669 | ||
844b3a87 | 2670 | /* |
40ecd8e4 DS |
2671 | * We should allow duplicate connected routes |
2672 | * because of IPv6 link-local routes and unnumbered | |
2673 | * interfaces on Linux. | |
844b3a87 RW |
2674 | */ |
2675 | if (same->type != ZEBRA_ROUTE_CONNECT) | |
d62a17ae | 2676 | break; |
2677 | } | |
718e3744 | 2678 | |
d62a17ae | 2679 | /* If this route is kernel route, set FIB flag to the route. */ |
8628fc61 | 2680 | if (RIB_SYSTEM_ROUTE(re)) |
7ee30f28 | 2681 | for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) |
d62a17ae | 2682 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
718e3744 | 2683 | |
d62a17ae | 2684 | /* Link new re to node.*/ |
2685 | if (IS_ZEBRA_DEBUG_RIB) { | |
2686 | rnode_debug( | |
2687 | rn, re->vrf_id, | |
2688 | "Inserting route rn %p, re %p (type %d) existing %p", | |
2689 | (void *)rn, (void *)re, re->type, (void *)same); | |
718e3744 | 2690 | |
d62a17ae | 2691 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2692 | route_entry_dump(p, src_p, re); | |
718e3744 | 2693 | } |
d62a17ae | 2694 | rib_addnode(rn, re, 1); |
2695 | ret = 1; | |
6b0655a2 | 2696 | |
d62a17ae | 2697 | /* Free implicit route.*/ |
2698 | if (same) { | |
2699 | rib_delnode(rn, same); | |
2700 | ret = -1; | |
2701 | } | |
718e3744 | 2702 | |
d62a17ae | 2703 | route_unlock_node(rn); |
2704 | return ret; | |
2705 | } | |
2706 | ||
2707 | void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, | |
d7c0a89a | 2708 | unsigned short instance, int flags, struct prefix *p, |
fd36be7e | 2709 | struct prefix_ipv6 *src_p, const struct nexthop *nh, |
40ecd8e4 DS |
2710 | uint32_t table_id, uint32_t metric, uint8_t distance, |
2711 | bool fromkernel) | |
d62a17ae | 2712 | { |
2713 | struct route_table *table; | |
2714 | struct route_node *rn; | |
2715 | struct route_entry *re; | |
2716 | struct route_entry *fib = NULL; | |
2717 | struct route_entry *same = NULL; | |
fd36be7e | 2718 | struct nexthop *rtnh; |
d62a17ae | 2719 | char buf2[INET6_ADDRSTRLEN]; |
5f7a4718 | 2720 | rib_dest_t *dest; |
d62a17ae | 2721 | |
1f610a1f | 2722 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
d62a17ae | 2723 | |
2724 | /* Lookup table. */ | |
2725 | table = zebra_vrf_table_with_table_id(afi, safi, vrf_id, table_id); | |
2726 | if (!table) | |
2727 | return; | |
2728 | ||
2729 | /* Apply mask. */ | |
2730 | apply_mask(p); | |
2731 | if (src_p) | |
2732 | apply_mask_ipv6(src_p); | |
2733 | ||
2734 | /* Lookup route node. */ | |
2735 | rn = srcdest_rnode_lookup(table, p, src_p); | |
2736 | if (!rn) { | |
2737 | char dst_buf[PREFIX_STRLEN], src_buf[PREFIX_STRLEN]; | |
2738 | ||
2739 | prefix2str(p, dst_buf, sizeof(dst_buf)); | |
2740 | if (src_p && src_p->prefixlen) | |
2741 | prefix2str(src_p, src_buf, sizeof(src_buf)); | |
2742 | else | |
2743 | src_buf[0] = '\0'; | |
2744 | ||
2745 | if (IS_ZEBRA_DEBUG_RIB) | |
2746 | zlog_debug("%u:%s%s%s doesn't exist in rib", vrf_id, | |
2747 | dst_buf, | |
2748 | (src_buf[0] != '\0') ? " from " : "", | |
2749 | src_buf); | |
2750 | return; | |
2751 | } | |
718e3744 | 2752 | |
5f7a4718 DS |
2753 | dest = rib_dest_from_rnode(rn); |
2754 | fib = dest->selected_fib; | |
2755 | ||
d62a17ae | 2756 | /* Lookup same type route. */ |
a2addae8 | 2757 | RNODE_FOREACH_RE (rn, re) { |
d62a17ae | 2758 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
2759 | continue; | |
2760 | ||
d62a17ae | 2761 | if (re->type != type) |
2762 | continue; | |
2763 | if (re->instance != instance) | |
2764 | continue; | |
40ecd8e4 DS |
2765 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_RR_USE_DISTANCE) && |
2766 | distance != re->distance) | |
2767 | continue; | |
2768 | ||
996c9314 | 2769 | if (re->type == ZEBRA_ROUTE_KERNEL && re->metric != metric) |
f19435a8 | 2770 | continue; |
7ee30f28 | 2771 | if (re->type == ZEBRA_ROUTE_CONNECT && (rtnh = re->ng.nexthop) |
fd36be7e DL |
2772 | && rtnh->type == NEXTHOP_TYPE_IFINDEX && nh) { |
2773 | if (rtnh->ifindex != nh->ifindex) | |
d62a17ae | 2774 | continue; |
d62a17ae | 2775 | same = re; |
2776 | break; | |
2777 | } | |
2778 | /* Make sure that the route found has the same gateway. */ | |
2779 | else { | |
fd36be7e | 2780 | if (nh == NULL) { |
d62a17ae | 2781 | same = re; |
2782 | break; | |
2783 | } | |
7ee30f28 | 2784 | for (ALL_NEXTHOPS(re->ng, rtnh)) |
fd36be7e | 2785 | if (nexthop_same_no_recurse(rtnh, nh)) { |
d62a17ae | 2786 | same = re; |
2787 | break; | |
2788 | } | |
2789 | if (same) | |
2790 | break; | |
2791 | } | |
2792 | } | |
2793 | /* If same type of route can't be found and this message is from | |
2794 | kernel. */ | |
2795 | if (!same) { | |
5dfeba19 DS |
2796 | /* |
2797 | * In the past(HA!) we could get here because | |
2798 | * we were receiving a route delete from the | |
2799 | * kernel and we're not marking the proto | |
2800 | * as coming from it's appropriate originator. | |
2801 | * Now that we are properly noticing the fact | |
2802 | * that the kernel has deleted our route we | |
2803 | * are not going to get called in this path | |
2804 | * I am going to leave this here because | |
2805 | * this might still work this way on non-linux | |
2806 | * platforms as well as some weird state I have | |
2807 | * not properly thought of yet. | |
2808 | * If we can show that this code path is | |
2809 | * dead then we can remove it. | |
2810 | */ | |
b8faa875 | 2811 | if (fib && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) { |
d62a17ae | 2812 | if (IS_ZEBRA_DEBUG_RIB) { |
2813 | rnode_debug( | |
2814 | rn, vrf_id, | |
2815 | "rn %p, re %p (type %d) was deleted from kernel, adding", | |
2816 | rn, fib, fib->type); | |
2817 | } | |
2818 | if (allow_delete) { | |
2819 | /* Unset flags. */ | |
7ee30f28 | 2820 | for (rtnh = fib->ng.nexthop; rtnh; |
fd36be7e DL |
2821 | rtnh = rtnh->next) |
2822 | UNSET_FLAG(rtnh->flags, | |
d62a17ae | 2823 | NEXTHOP_FLAG_FIB); |
2824 | ||
ed216282 DS |
2825 | /* |
2826 | * This is a non FRR route | |
2827 | * as such we should mark | |
2828 | * it as deleted | |
2829 | */ | |
5f7a4718 | 2830 | dest->selected_fib = NULL; |
d62a17ae | 2831 | } else { |
2832 | /* This means someone else, other than Zebra, | |
2833 | * has deleted | |
2834 | * a Zebra router from the kernel. We will add | |
2835 | * it back */ | |
2836 | rib_install_kernel(rn, fib, NULL); | |
2837 | } | |
2838 | } else { | |
2839 | if (IS_ZEBRA_DEBUG_RIB) { | |
fd36be7e | 2840 | if (nh) |
d62a17ae | 2841 | rnode_debug( |
2842 | rn, vrf_id, | |
2843 | "via %s ifindex %d type %d " | |
2844 | "doesn't exist in rib", | |
36228974 | 2845 | inet_ntop(afi2family(afi), |
2846 | &nh->gate, buf2, | |
2847 | sizeof(buf2)), | |
2848 | nh->ifindex, type); | |
d62a17ae | 2849 | else |
2850 | rnode_debug( | |
2851 | rn, vrf_id, | |
fd36be7e DL |
2852 | "type %d doesn't exist in rib", |
2853 | type); | |
d62a17ae | 2854 | } |
2855 | route_unlock_node(rn); | |
2856 | return; | |
2857 | } | |
2858 | } | |
718e3744 | 2859 | |
5dfeba19 | 2860 | if (same) { |
996c9314 LB |
2861 | if (fromkernel && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE) |
2862 | && !allow_delete) { | |
5dfeba19 DS |
2863 | rib_install_kernel(rn, same, NULL); |
2864 | route_unlock_node(rn); | |
2865 | ||
2866 | return; | |
2867 | } | |
6134fd82 | 2868 | |
90264d64 | 2869 | if (CHECK_FLAG(flags, ZEBRA_FLAG_EVPN_ROUTE)) { |
6134fd82 | 2870 | struct nexthop *tmp_nh; |
2871 | ||
7ee30f28 | 2872 | for (ALL_NEXTHOPS(re->ng, tmp_nh)) { |
6134fd82 | 2873 | struct ipaddr vtep_ip; |
2874 | ||
2875 | memset(&vtep_ip, 0, sizeof(struct ipaddr)); | |
1ec31309 | 2876 | if (afi == AFI_IP) { |
2877 | vtep_ip.ipa_type = IPADDR_V4; | |
2878 | memcpy(&(vtep_ip.ipaddr_v4), | |
2879 | &(tmp_nh->gate.ipv4), | |
2880 | sizeof(struct in_addr)); | |
2881 | } else { | |
2882 | vtep_ip.ipa_type = IPADDR_V6; | |
2883 | memcpy(&(vtep_ip.ipaddr_v6), | |
2884 | &(tmp_nh->gate.ipv6), | |
2885 | sizeof(struct in6_addr)); | |
2886 | } | |
a317a9b9 | 2887 | zebra_vxlan_evpn_vrf_route_del(re->vrf_id, |
6134fd82 | 2888 | &vtep_ip, p); |
2889 | } | |
2890 | } | |
d62a17ae | 2891 | rib_delnode(rn, same); |
5dfeba19 | 2892 | } |
05737783 | 2893 | |
d62a17ae | 2894 | route_unlock_node(rn); |
2895 | return; | |
2896 | } | |
718e3744 | 2897 | |
718e3744 | 2898 | |
d7c0a89a QY |
2899 | int rib_add(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
2900 | unsigned short instance, int flags, struct prefix *p, | |
2901 | struct prefix_ipv6 *src_p, const struct nexthop *nh, | |
2902 | uint32_t table_id, uint32_t metric, uint32_t mtu, uint8_t distance, | |
2903 | route_tag_t tag) | |
d62a17ae | 2904 | { |
2905 | struct route_entry *re; | |
66af6845 | 2906 | struct nexthop *nexthop; |
718e3744 | 2907 | |
66af6845 | 2908 | /* Allocate new route_entry structure. */ |
d62a17ae | 2909 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); |
d62a17ae | 2910 | re->type = type; |
2911 | re->instance = instance; | |
2912 | re->distance = distance; | |
2913 | re->flags = flags; | |
2914 | re->metric = metric; | |
2915 | re->mtu = mtu; | |
2916 | re->table = table_id; | |
2917 | re->vrf_id = vrf_id; | |
2918 | re->nexthop_num = 0; | |
2919 | re->uptime = time(NULL); | |
4e40b6d6 | 2920 | re->tag = tag; |
d62a17ae | 2921 | |
66af6845 RW |
2922 | /* Add nexthop. */ |
2923 | nexthop = nexthop_new(); | |
2924 | *nexthop = *nh; | |
2925 | route_entry_nexthop_add(re, nexthop); | |
718e3744 | 2926 | |
66af6845 | 2927 | return rib_add_multipath(afi, safi, p, src_p, re); |
718e3744 | 2928 | } |
2929 | ||
1c848137 | 2930 | /* Schedule routes of a particular table (address-family) based on event. */ |
d5b8c216 | 2931 | void rib_update_table(struct route_table *table, rib_update_event_t event) |
d62a17ae | 2932 | { |
2933 | struct route_node *rn; | |
2934 | struct route_entry *re, *next; | |
2935 | ||
2936 | /* Walk all routes and queue for processing, if appropriate for | |
2937 | * the trigger event. | |
2938 | */ | |
2939 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { | |
1ca60f2c DS |
2940 | /* |
2941 | * If we are looking at a route node and the node | |
2942 | * has already been queued we don't | |
2943 | * need to queue it up again | |
2944 | */ | |
996c9314 LB |
2945 | if (rn->info && CHECK_FLAG(rib_dest_from_rnode(rn)->flags, |
2946 | RIB_ROUTE_ANY_QUEUED)) | |
1ca60f2c | 2947 | continue; |
d62a17ae | 2948 | switch (event) { |
2949 | case RIB_UPDATE_IF_CHANGE: | |
2950 | /* Examine all routes that won't get processed by the | |
2951 | * protocol or | |
2952 | * triggered by nexthop evaluation (NHT). This would be | |
2953 | * system, | |
2954 | * kernel and certain static routes. Note that NHT will | |
2955 | * get | |
2956 | * triggered upon an interface event as connected routes | |
2957 | * always | |
2958 | * get queued for processing. | |
2959 | */ | |
a2addae8 | 2960 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
0a16efff DS |
2961 | struct nexthop *nh; |
2962 | ||
996c9314 LB |
2963 | if (re->type != ZEBRA_ROUTE_SYSTEM |
2964 | && re->type != ZEBRA_ROUTE_KERNEL | |
2965 | && re->type != ZEBRA_ROUTE_CONNECT | |
2966 | && re->type != ZEBRA_ROUTE_STATIC) | |
0a16efff DS |
2967 | continue; |
2968 | ||
2969 | if (re->type != ZEBRA_ROUTE_STATIC) { | |
2970 | rib_queue_add(rn); | |
2971 | continue; | |
2972 | } | |
2973 | ||
7ee30f28 | 2974 | for (nh = re->ng.nexthop; nh; nh = nh->next) |
0a16efff DS |
2975 | if (!(nh->type == NEXTHOP_TYPE_IPV4 |
2976 | || nh->type == NEXTHOP_TYPE_IPV6)) | |
2977 | break; | |
2978 | ||
2979 | /* If we only have nexthops to a | |
2980 | * gateway, NHT will | |
2981 | * take care. | |
2982 | */ | |
2983 | if (nh) | |
d62a17ae | 2984 | rib_queue_add(rn); |
2985 | } | |
2986 | break; | |
2987 | ||
2988 | case RIB_UPDATE_RMAP_CHANGE: | |
2989 | case RIB_UPDATE_OTHER: | |
2990 | /* Right now, examine all routes. Can restrict to a | |
2991 | * protocol in | |
2992 | * some cases (TODO). | |
2993 | */ | |
2994 | if (rnode_to_ribs(rn)) | |
2995 | rib_queue_add(rn); | |
2996 | break; | |
2997 | ||
2998 | default: | |
2999 | break; | |
3000 | } | |
3001 | } | |
b84c7253 | 3002 | } |
3003 | ||
718e3744 | 3004 | /* RIB update function. */ |
d62a17ae | 3005 | void rib_update(vrf_id_t vrf_id, rib_update_event_t event) |
718e3744 | 3006 | { |
d62a17ae | 3007 | struct route_table *table; |
1c848137 | 3008 | |
d62a17ae | 3009 | /* Process routes of interested address-families. */ |
3010 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
d5b8c216 | 3011 | if (table) { |
3012 | if (IS_ZEBRA_DEBUG_EVENT) | |
3013 | zlog_debug("%s : AFI_IP event %d", __func__, event); | |
d62a17ae | 3014 | rib_update_table(table, event); |
d5b8c216 | 3015 | } |
718e3744 | 3016 | |
d62a17ae | 3017 | table = zebra_vrf_table(AFI_IP6, SAFI_UNICAST, vrf_id); |
d5b8c216 | 3018 | if (table) { |
3019 | if (IS_ZEBRA_DEBUG_EVENT) | |
3020 | zlog_debug("%s : AFI_IP6 event %d", __func__, event); | |
d62a17ae | 3021 | rib_update_table(table, event); |
d5b8c216 | 3022 | } |
718e3744 | 3023 | } |
3024 | ||
718e3744 | 3025 | /* Delete self installed routes after zebra is relaunched. */ |
95a29032 | 3026 | void rib_sweep_table(struct route_table *table) |
d62a17ae | 3027 | { |
3028 | struct route_node *rn; | |
3029 | struct route_entry *re; | |
3030 | struct route_entry *next; | |
915902cb | 3031 | struct nexthop *nexthop; |
d62a17ae | 3032 | |
915902cb DS |
3033 | if (!table) |
3034 | return; | |
d62a17ae | 3035 | |
915902cb | 3036 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
a2addae8 | 3037 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
915902cb DS |
3038 | if (IS_ZEBRA_DEBUG_RIB) |
3039 | route_entry_dump(&rn->p, NULL, re); | |
3040 | ||
3041 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
3042 | continue; | |
3043 | ||
3044 | if (!CHECK_FLAG(re->flags, ZEBRA_FLAG_SELFROUTE)) | |
3045 | continue; | |
3046 | ||
3047 | /* | |
3048 | * So we are starting up and have received | |
3049 | * routes from the kernel that we have installed | |
3050 | * from a previous run of zebra but not cleaned | |
3051 | * up ( say a kill -9 ) | |
3052 | * But since we haven't actually installed | |
3053 | * them yet( we received them from the kernel ) | |
3054 | * we don't think they are active. | |
3055 | * So let's pretend they are active to actually | |
3056 | * remove them. | |
3057 | * In all honesty I'm not sure if we should | |
3058 | * mark them as active when we receive them | |
3059 | * This is startup only so probably ok. | |
3060 | * | |
3061 | * If we ever decide to move rib_sweep_table | |
3062 | * to a different spot (ie startup ) | |
3063 | * this decision needs to be revisited | |
3064 | */ | |
7ee30f28 | 3065 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
915902cb DS |
3066 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
3067 | ||
0c555cc6 DS |
3068 | rib_uninstall_kernel(rn, re); |
3069 | rib_delnode(rn, re); | |
915902cb DS |
3070 | } |
3071 | } | |
718e3744 | 3072 | } |
3073 | ||
3074 | /* Sweep all RIB tables. */ | |
d62a17ae | 3075 | void rib_sweep_route(void) |
718e3744 | 3076 | { |
d62a17ae | 3077 | struct vrf *vrf; |
3078 | struct zebra_vrf *zvrf; | |
78104b9b | 3079 | |
a2addae8 | 3080 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
915902cb DS |
3081 | if ((zvrf = vrf->info) == NULL) |
3082 | continue; | |
3083 | ||
d62a17ae | 3084 | rib_sweep_table(zvrf->table[AFI_IP][SAFI_UNICAST]); |
3085 | rib_sweep_table(zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3086 | } | |
95a29032 | 3087 | |
89272910 | 3088 | zebra_router_sweep_route(); |
718e3744 | 3089 | } |
2ea1ab1c VT |
3090 | |
3091 | /* Remove specific by protocol routes from 'table'. */ | |
d7c0a89a | 3092 | unsigned long rib_score_proto_table(uint8_t proto, unsigned short instance, |
47a08aa9 | 3093 | struct route_table *table) |
d62a17ae | 3094 | { |
3095 | struct route_node *rn; | |
3096 | struct route_entry *re; | |
3097 | struct route_entry *next; | |
3098 | unsigned long n = 0; | |
3099 | ||
3100 | if (table) | |
3101 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) | |
a2addae8 | 3102 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 3103 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
3104 | continue; | |
3105 | if (re->type == proto | |
3106 | && re->instance == instance) { | |
3107 | rib_delnode(rn, re); | |
3108 | n++; | |
3109 | } | |
3110 | } | |
3111 | return n; | |
2ea1ab1c VT |
3112 | } |
3113 | ||
3114 | /* Remove specific by protocol routes. */ | |
d7c0a89a | 3115 | unsigned long rib_score_proto(uint8_t proto, unsigned short instance) |
2ea1ab1c | 3116 | { |
d62a17ae | 3117 | struct vrf *vrf; |
3118 | struct zebra_vrf *zvrf; | |
3119 | unsigned long cnt = 0; | |
78104b9b | 3120 | |
a2addae8 RW |
3121 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
3122 | if ((zvrf = vrf->info) != NULL) | |
3123 | cnt += rib_score_proto_table( | |
3124 | proto, instance, | |
3125 | zvrf->table[AFI_IP][SAFI_UNICAST]) | |
3126 | + rib_score_proto_table( | |
3127 | proto, instance, | |
3128 | zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
78104b9b | 3129 | |
89272910 | 3130 | cnt += zebra_router_score_proto(proto, instance); |
47a08aa9 | 3131 | |
d62a17ae | 3132 | return cnt; |
2ea1ab1c VT |
3133 | } |
3134 | ||
718e3744 | 3135 | /* Close RIB and clean up kernel routes. */ |
d62a17ae | 3136 | void rib_close_table(struct route_table *table) |
718e3744 | 3137 | { |
d62a17ae | 3138 | struct route_node *rn; |
1e9f448f | 3139 | rib_table_info_t *info; |
5f7a4718 | 3140 | rib_dest_t *dest; |
718e3744 | 3141 | |
1e9f448f DS |
3142 | if (!table) |
3143 | return; | |
9fd92e3c | 3144 | |
6ca30e9e | 3145 | info = route_table_get_info(table); |
5adc2528 | 3146 | |
5f7a4718 DS |
3147 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
3148 | dest = rib_dest_from_rnode(rn); | |
1e9f448f | 3149 | |
5f7a4718 | 3150 | if (dest && dest->selected_fib) { |
1e9f448f DS |
3151 | if (info->safi == SAFI_UNICAST) |
3152 | hook_call(rib_update, rn, NULL); | |
3153 | ||
258c07e4 | 3154 | if (!RIB_SYSTEM_ROUTE(dest->selected_fib)) { |
5f7a4718 | 3155 | rib_uninstall_kernel(rn, dest->selected_fib); |
258c07e4 MS |
3156 | dest->selected_fib = NULL; |
3157 | } | |
1e9f448f | 3158 | } |
5f7a4718 | 3159 | } |
718e3744 | 3160 | } |
3161 | ||
7cdb1a84 MS |
3162 | /* |
3163 | * | |
3164 | */ | |
3165 | static int rib_process_dplane_results(struct thread *thread) | |
3166 | { | |
25779064 | 3167 | struct zebra_dplane_ctx *ctx; |
7cdb1a84 MS |
3168 | |
3169 | do { | |
3170 | /* Take lock controlling queue of results */ | |
3171 | pthread_mutex_lock(&dplane_mutex); | |
3172 | { | |
3173 | /* Dequeue context block */ | |
68b375e0 | 3174 | ctx = dplane_ctx_dequeue(&rib_dplane_q); |
7cdb1a84 MS |
3175 | } |
3176 | pthread_mutex_unlock(&dplane_mutex); | |
3177 | ||
5709131c | 3178 | if (ctx) |
e5ac2adf | 3179 | rib_process_after(ctx); |
5709131c | 3180 | else |
7cdb1a84 | 3181 | break; |
7cdb1a84 | 3182 | |
5709131c | 3183 | } while (1); |
7cdb1a84 | 3184 | |
f183e380 MS |
3185 | /* Check for nexthop tracking processing after finishing with results */ |
3186 | do_nht_processing(); | |
3187 | ||
5709131c | 3188 | return 0; |
7cdb1a84 MS |
3189 | } |
3190 | ||
3191 | /* | |
3192 | * Results are returned from the dataplane subsystem, in the context of | |
1bcea841 | 3193 | * the dataplane pthread. We enqueue the results here for processing by |
7cdb1a84 MS |
3194 | * the main thread later. |
3195 | */ | |
c831033f | 3196 | static int rib_dplane_results(struct zebra_dplane_ctx *ctx) |
7cdb1a84 MS |
3197 | { |
3198 | /* Take lock controlling queue of results */ | |
3199 | pthread_mutex_lock(&dplane_mutex); | |
3200 | { | |
3201 | /* Enqueue context block */ | |
3202 | dplane_ctx_enqueue_tail(&rib_dplane_q, ctx); | |
3203 | } | |
3204 | pthread_mutex_unlock(&dplane_mutex); | |
3205 | ||
3206 | /* Ensure event is signalled to zebra main thread */ | |
3207 | thread_add_event(zebrad.master, rib_process_dplane_results, NULL, 0, | |
3208 | &t_dplane); | |
3209 | ||
5709131c | 3210 | return 0; |
7cdb1a84 MS |
3211 | } |
3212 | ||
718e3744 | 3213 | /* Routing information base initialize. */ |
d62a17ae | 3214 | void rib_init(void) |
718e3744 | 3215 | { |
d62a17ae | 3216 | rib_queue_init(&zebrad); |
7cdb1a84 MS |
3217 | |
3218 | /* Init dataplane, and register for results */ | |
3219 | pthread_mutex_init(&dplane_mutex, NULL); | |
3220 | TAILQ_INIT(&rib_dplane_q); | |
3221 | zebra_dplane_init(); | |
3222 | dplane_results_register(rib_dplane_results); | |
718e3744 | 3223 | } |
0915bb0c AS |
3224 | |
3225 | /* | |
3226 | * vrf_id_get_next | |
3227 | * | |
3228 | * Get the first vrf id that is greater than the given vrf id if any. | |
3229 | * | |
3230 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
3231 | */ | |
d62a17ae | 3232 | static inline int vrf_id_get_next(vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 3233 | { |
d62a17ae | 3234 | struct vrf *vrf; |
b72ede27 | 3235 | |
d62a17ae | 3236 | vrf = vrf_lookup_by_id(vrf_id); |
3237 | if (vrf) { | |
3238 | vrf = RB_NEXT(vrf_id_head, vrf); | |
3239 | if (vrf) { | |
3240 | *next_id_p = vrf->vrf_id; | |
3241 | return 1; | |
3242 | } | |
3243 | } | |
0915bb0c | 3244 | |
d62a17ae | 3245 | return 0; |
0915bb0c AS |
3246 | } |
3247 | ||
3248 | /* | |
3249 | * rib_tables_iter_next | |
3250 | * | |
3251 | * Returns the next table in the iteration. | |
3252 | */ | |
d62a17ae | 3253 | struct route_table *rib_tables_iter_next(rib_tables_iter_t *iter) |
3254 | { | |
3255 | struct route_table *table; | |
3256 | ||
3257 | /* | |
3258 | * Array that helps us go over all AFI/SAFI combinations via one | |
3259 | * index. | |
3260 | */ | |
3261 | static struct { | |
3262 | afi_t afi; | |
3263 | safi_t safi; | |
3264 | } afi_safis[] = { | |
3265 | {AFI_IP, SAFI_UNICAST}, {AFI_IP, SAFI_MULTICAST}, | |
3266 | {AFI_IP, SAFI_LABELED_UNICAST}, {AFI_IP6, SAFI_UNICAST}, | |
3267 | {AFI_IP6, SAFI_MULTICAST}, {AFI_IP6, SAFI_LABELED_UNICAST}, | |
3268 | }; | |
3269 | ||
3270 | table = NULL; | |
3271 | ||
3272 | switch (iter->state) { | |
3273 | ||
3274 | case RIB_TABLES_ITER_S_INIT: | |
3275 | iter->vrf_id = VRF_DEFAULT; | |
3276 | iter->afi_safi_ix = -1; | |
3277 | ||
3278 | /* Fall through */ | |
3279 | ||
3280 | case RIB_TABLES_ITER_S_ITERATING: | |
3281 | iter->afi_safi_ix++; | |
3282 | while (1) { | |
3283 | ||
3284 | while (iter->afi_safi_ix | |
3285 | < (int)ZEBRA_NUM_OF(afi_safis)) { | |
3286 | table = zebra_vrf_table( | |
3287 | afi_safis[iter->afi_safi_ix].afi, | |
3288 | afi_safis[iter->afi_safi_ix].safi, | |
3289 | iter->vrf_id); | |
3290 | if (table) | |
3291 | break; | |
3292 | ||
3293 | iter->afi_safi_ix++; | |
3294 | } | |
3295 | ||
3296 | /* | |
3297 | * Found another table in this vrf. | |
3298 | */ | |
3299 | if (table) | |
3300 | break; | |
3301 | ||
3302 | /* | |
3303 | * Done with all tables in the current vrf, go to the | |
3304 | * next | |
3305 | * one. | |
3306 | */ | |
3307 | if (!vrf_id_get_next(iter->vrf_id, &iter->vrf_id)) | |
3308 | break; | |
3309 | ||
3310 | iter->afi_safi_ix = 0; | |
3311 | } | |
0915bb0c | 3312 | |
0915bb0c AS |
3313 | break; |
3314 | ||
d62a17ae | 3315 | case RIB_TABLES_ITER_S_DONE: |
3316 | return NULL; | |
0915bb0c AS |
3317 | } |
3318 | ||
d62a17ae | 3319 | if (table) |
3320 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
3321 | else | |
3322 | iter->state = RIB_TABLES_ITER_S_DONE; | |
0915bb0c | 3323 | |
d62a17ae | 3324 | return table; |
0915bb0c | 3325 | } |