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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) |
b3d43ff4 | 166 | || (table_id == zrouter.rtm_table_default)) |
d62a17ae | 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) |
fe85601c | 280 | || CHECK_FLAG(re->flags, ZEBRA_FLAG_EVPN_ROUTE)) { |
d62a17ae | 281 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); |
282 | } | |
718e3744 | 283 | |
d62a17ae | 284 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 285 | |
d62a17ae | 286 | return nexthop; |
718e3744 | 287 | } |
288 | ||
d62a17ae | 289 | struct nexthop *route_entry_nexthop_ipv6_add(struct route_entry *re, |
4a7371e9 DS |
290 | struct in6_addr *ipv6, |
291 | vrf_id_t nh_vrf_id) | |
718e3744 | 292 | { |
d62a17ae | 293 | struct nexthop *nexthop; |
718e3744 | 294 | |
d62a17ae | 295 | nexthop = nexthop_new(); |
4a7371e9 | 296 | nexthop->vrf_id = nh_vrf_id; |
d62a17ae | 297 | nexthop->type = NEXTHOP_TYPE_IPV6; |
298 | nexthop->gate.ipv6 = *ipv6; | |
718e3744 | 299 | |
d62a17ae | 300 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 301 | |
d62a17ae | 302 | return nexthop; |
718e3744 | 303 | } |
304 | ||
d62a17ae | 305 | struct nexthop *route_entry_nexthop_ipv6_ifindex_add(struct route_entry *re, |
306 | struct in6_addr *ipv6, | |
4a7371e9 DS |
307 | ifindex_t ifindex, |
308 | vrf_id_t nh_vrf_id) | |
718e3744 | 309 | { |
d62a17ae | 310 | struct nexthop *nexthop; |
718e3744 | 311 | |
d62a17ae | 312 | nexthop = nexthop_new(); |
4a7371e9 | 313 | nexthop->vrf_id = nh_vrf_id; |
d62a17ae | 314 | nexthop->type = NEXTHOP_TYPE_IPV6_IFINDEX; |
315 | nexthop->gate.ipv6 = *ipv6; | |
316 | nexthop->ifindex = ifindex; | |
fe85601c | 317 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_EVPN_ROUTE)) |
1ec31309 | 318 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK); |
718e3744 | 319 | |
d62a17ae | 320 | route_entry_nexthop_add(re, nexthop); |
718e3744 | 321 | |
d62a17ae | 322 | return nexthop; |
718e3744 | 323 | } |
718e3744 | 324 | |
a8309422 | 325 | struct nexthop *route_entry_nexthop_blackhole_add(struct route_entry *re, |
60466a63 | 326 | enum blackhole_type bh_type) |
595db7f1 | 327 | { |
d62a17ae | 328 | struct nexthop *nexthop; |
595db7f1 | 329 | |
d62a17ae | 330 | nexthop = nexthop_new(); |
4a7371e9 | 331 | nexthop->vrf_id = VRF_DEFAULT; |
d62a17ae | 332 | nexthop->type = NEXTHOP_TYPE_BLACKHOLE; |
a8309422 | 333 | nexthop->bh_type = bh_type; |
595db7f1 | 334 | |
d62a17ae | 335 | route_entry_nexthop_add(re, nexthop); |
595db7f1 | 336 | |
d62a17ae | 337 | return nexthop; |
595db7f1 | 338 | } |
339 | ||
86391e56 | 340 | static void nexthop_set_resolved(afi_t afi, const struct nexthop *newhop, |
d62a17ae | 341 | struct nexthop *nexthop) |
4491a88f | 342 | { |
d62a17ae | 343 | struct nexthop *resolved_hop; |
4491a88f | 344 | |
d62a17ae | 345 | resolved_hop = nexthop_new(); |
346 | SET_FLAG(resolved_hop->flags, NEXTHOP_FLAG_ACTIVE); | |
d855d11f | 347 | |
4a7371e9 | 348 | resolved_hop->vrf_id = nexthop->vrf_id; |
d855d11f RW |
349 | switch (newhop->type) { |
350 | case NEXTHOP_TYPE_IPV4: | |
351 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
352 | /* If the resolving route specifies a gateway, use it */ | |
d62a17ae | 353 | resolved_hop->type = newhop->type; |
354 | resolved_hop->gate.ipv4 = newhop->gate.ipv4; | |
4491a88f | 355 | |
d62a17ae | 356 | if (newhop->ifindex) { |
357 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
358 | resolved_hop->ifindex = newhop->ifindex; | |
d62a17ae | 359 | } |
d855d11f RW |
360 | break; |
361 | case NEXTHOP_TYPE_IPV6: | |
362 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
d62a17ae | 363 | resolved_hop->type = newhop->type; |
364 | resolved_hop->gate.ipv6 = newhop->gate.ipv6; | |
365 | ||
366 | if (newhop->ifindex) { | |
367 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
368 | resolved_hop->ifindex = newhop->ifindex; | |
369 | } | |
d855d11f RW |
370 | break; |
371 | case NEXTHOP_TYPE_IFINDEX: | |
372 | /* If the resolving route is an interface route, | |
373 | * it means the gateway we are looking up is connected | |
374 | * to that interface. (The actual network is _not_ onlink). | |
375 | * Therefore, the resolved route should have the original | |
376 | * gateway as nexthop as it is directly connected. | |
377 | * | |
378 | * On Linux, we have to set the onlink netlink flag because | |
379 | * otherwise, the kernel won't accept the route. | |
380 | */ | |
d62a17ae | 381 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; |
382 | if (afi == AFI_IP) { | |
383 | resolved_hop->type = NEXTHOP_TYPE_IPV4_IFINDEX; | |
384 | resolved_hop->gate.ipv4 = nexthop->gate.ipv4; | |
385 | } else if (afi == AFI_IP6) { | |
386 | resolved_hop->type = NEXTHOP_TYPE_IPV6_IFINDEX; | |
387 | resolved_hop->gate.ipv6 = nexthop->gate.ipv6; | |
388 | } | |
389 | resolved_hop->ifindex = newhop->ifindex; | |
d855d11f RW |
390 | break; |
391 | case NEXTHOP_TYPE_BLACKHOLE: | |
59693377 DS |
392 | resolved_hop->type = NEXTHOP_TYPE_BLACKHOLE; |
393 | resolved_hop->bh_type = nexthop->bh_type; | |
d855d11f | 394 | break; |
59693377 | 395 | } |
d855d11f | 396 | |
effcfaeb DS |
397 | if (newhop->flags & NEXTHOP_FLAG_ONLINK) |
398 | resolved_hop->flags |= NEXTHOP_FLAG_ONLINK; | |
399 | ||
f674dfe2 RW |
400 | /* Copy labels of the resolved route */ |
401 | if (newhop->nh_label) | |
402 | nexthop_add_labels(resolved_hop, newhop->nh_label_type, | |
403 | newhop->nh_label->num_labels, | |
404 | &newhop->nh_label->label[0]); | |
405 | ||
d62a17ae | 406 | resolved_hop->rparent = nexthop; |
407 | nexthop_add(&nexthop->resolved, resolved_hop); | |
4491a88f DS |
408 | } |
409 | ||
718e3744 | 410 | /* If force flag is not set, do not modify falgs at all for uninstall |
411 | the route from FIB. */ | |
d62a17ae | 412 | static int nexthop_active(afi_t afi, struct route_entry *re, |
0dddbf72 | 413 | struct nexthop *nexthop, bool set, |
d62a17ae | 414 | struct route_node *top) |
415 | { | |
416 | struct prefix p; | |
417 | struct route_table *table; | |
418 | struct route_node *rn; | |
5f7a4718 | 419 | struct route_entry *match = NULL; |
d62a17ae | 420 | int resolved; |
421 | struct nexthop *newhop; | |
422 | struct interface *ifp; | |
5f7a4718 | 423 | rib_dest_t *dest; |
d62a17ae | 424 | |
425 | if ((nexthop->type == NEXTHOP_TYPE_IPV4) | |
426 | || nexthop->type == NEXTHOP_TYPE_IPV6) | |
427 | nexthop->ifindex = 0; | |
428 | ||
429 | if (set) { | |
430 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE); | |
d62a17ae | 431 | nexthops_free(nexthop->resolved); |
432 | nexthop->resolved = NULL; | |
433 | re->nexthop_mtu = 0; | |
d44ca835 | 434 | } |
18ff3edd | 435 | |
1ec31309 | 436 | /* Next hops (remote VTEPs) for EVPN routes are fully resolved. */ |
437 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_EVPN_RVTEP)) | |
438 | return 1; | |
439 | ||
058c16b7 DS |
440 | /* |
441 | * If the kernel has sent us a route, then | |
442 | * by golly gee whiz it's a good route. | |
443 | */ | |
444 | if (re->type == ZEBRA_ROUTE_KERNEL || | |
445 | re->type == ZEBRA_ROUTE_SYSTEM) | |
446 | return 1; | |
447 | ||
d62a17ae | 448 | /* Skip nexthops that have been filtered out due to route-map */ |
449 | /* The nexthops are specific to this route and so the same */ | |
450 | /* nexthop for a different route may not have this flag set */ | |
34815ea3 DS |
451 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FILTERED)) { |
452 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
453 | zlog_debug("\t%s: Nexthop Filtered", | |
454 | __PRETTY_FUNCTION__); | |
d62a17ae | 455 | return 0; |
34815ea3 | 456 | } |
d62a17ae | 457 | |
458 | /* | |
459 | * Check to see if we should trust the passed in information | |
460 | * for UNNUMBERED interfaces as that we won't find the GW | |
461 | * address in the routing table. | |
462 | */ | |
463 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) { | |
4a7371e9 | 464 | ifp = if_lookup_by_index(nexthop->ifindex, nexthop->vrf_id); |
fe85601c DS |
465 | if (!ifp) { |
466 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
467 | zlog_debug( | |
468 | "\t%s: Onlink and interface: %u[%u] does not exist", | |
469 | __PRETTY_FUNCTION__, nexthop->ifindex, | |
470 | nexthop->vrf_id); | |
471 | return 0; | |
472 | } | |
473 | if (connected_is_unnumbered(ifp)) { | |
d62a17ae | 474 | if (if_is_operative(ifp)) |
475 | return 1; | |
34815ea3 DS |
476 | else { |
477 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
478 | zlog_debug( | |
479 | "\t%s: Onlink and interface %s is not operative", | |
480 | __PRETTY_FUNCTION__, ifp->name); | |
d62a17ae | 481 | return 0; |
34815ea3 | 482 | } |
fe85601c DS |
483 | } |
484 | if (!if_is_operative(ifp)) { | |
34815ea3 DS |
485 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
486 | zlog_debug( | |
487 | "\t%s: Interface %s is not unnumbered", | |
488 | __PRETTY_FUNCTION__, | |
489 | ifp ? ifp->name : "Unknown"); | |
d62a17ae | 490 | return 0; |
34815ea3 | 491 | } |
16814f96 | 492 | } |
718e3744 | 493 | |
d62a17ae | 494 | /* Make lookup prefix. */ |
495 | memset(&p, 0, sizeof(struct prefix)); | |
496 | switch (afi) { | |
497 | case AFI_IP: | |
498 | p.family = AF_INET; | |
499 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
500 | p.u.prefix4 = nexthop->gate.ipv4; | |
501 | break; | |
502 | case AFI_IP6: | |
503 | p.family = AF_INET6; | |
504 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
505 | p.u.prefix6 = nexthop->gate.ipv6; | |
506 | break; | |
507 | default: | |
508 | assert(afi != AFI_IP && afi != AFI_IP6); | |
509 | break; | |
718e3744 | 510 | } |
d62a17ae | 511 | /* Lookup table. */ |
4a7371e9 | 512 | table = zebra_vrf_table(afi, SAFI_UNICAST, nexthop->vrf_id); |
34815ea3 DS |
513 | if (!table) { |
514 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
515 | zlog_debug("\t%s: Table not found", | |
516 | __PRETTY_FUNCTION__); | |
d62a17ae | 517 | return 0; |
34815ea3 | 518 | } |
d62a17ae | 519 | |
520 | rn = route_node_match(table, (struct prefix *)&p); | |
521 | while (rn) { | |
522 | route_unlock_node(rn); | |
523 | ||
fd7fd9e5 DS |
524 | /* Lookup should halt if we've matched against ourselves ('top', |
525 | * if specified) - i.e., we cannot have a nexthop NH1 is | |
526 | * resolved by a route NH1. The exception is if the route is a | |
527 | * host route. | |
528 | */ | |
529 | if (top && rn == top) | |
996c9314 | 530 | if (((afi == AFI_IP) && (rn->p.prefixlen != 32)) |
34815ea3 DS |
531 | || ((afi == AFI_IP6) && (rn->p.prefixlen != 128))) { |
532 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
533 | zlog_debug( | |
534 | "\t%s: Matched against ourself and prefix length is not max bit length", | |
535 | __PRETTY_FUNCTION__); | |
fd7fd9e5 | 536 | return 0; |
34815ea3 | 537 | } |
d62a17ae | 538 | |
539 | /* Pick up selected route. */ | |
540 | /* However, do not resolve over default route unless explicitly | |
541 | * allowed. */ | |
542 | if (is_default_prefix(&rn->p) | |
34815ea3 DS |
543 | && !rnh_resolve_via_default(p.family)) { |
544 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
545 | zlog_debug( | |
546 | "\t:%s: Resolved against default route", | |
547 | __PRETTY_FUNCTION__); | |
d62a17ae | 548 | return 0; |
34815ea3 | 549 | } |
d62a17ae | 550 | |
5f7a4718 | 551 | dest = rib_dest_from_rnode(rn); |
996c9314 LB |
552 | if (dest && dest->selected_fib |
553 | && !CHECK_FLAG(dest->selected_fib->status, | |
554 | ROUTE_ENTRY_REMOVED) | |
555 | && dest->selected_fib->type != ZEBRA_ROUTE_TABLE) | |
5f7a4718 | 556 | match = dest->selected_fib; |
48a53dc7 | 557 | |
d62a17ae | 558 | /* If there is no selected route or matched route is EGP, go up |
559 | tree. */ | |
560 | if (!match) { | |
561 | do { | |
562 | rn = rn->parent; | |
563 | } while (rn && rn->info == NULL); | |
564 | if (rn) | |
565 | route_lock_node(rn); | |
c87bdd2b | 566 | |
d62a17ae | 567 | continue; |
568 | } | |
569 | ||
d62a17ae | 570 | if (match->type == ZEBRA_ROUTE_CONNECT) { |
571 | /* Directly point connected route. */ | |
7ee30f28 | 572 | newhop = match->ng.nexthop; |
d62a17ae | 573 | if (newhop) { |
574 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
575 | || nexthop->type == NEXTHOP_TYPE_IPV6) | |
576 | nexthop->ifindex = newhop->ifindex; | |
577 | } | |
578 | return 1; | |
4e8b02f4 | 579 | } else if (CHECK_FLAG(re->flags, ZEBRA_FLAG_ALLOW_RECURSION)) { |
d62a17ae | 580 | resolved = 0; |
7ee30f28 | 581 | for (ALL_NEXTHOPS(match->ng, newhop)) { |
677c1dd5 DS |
582 | if (!CHECK_FLAG(match->status, |
583 | ROUTE_ENTRY_INSTALLED)) | |
a8309422 DL |
584 | continue; |
585 | if (CHECK_FLAG(newhop->flags, | |
586 | NEXTHOP_FLAG_RECURSIVE)) | |
587 | continue; | |
588 | ||
589 | if (set) { | |
590 | SET_FLAG(nexthop->flags, | |
591 | NEXTHOP_FLAG_RECURSIVE); | |
592 | SET_FLAG(re->status, | |
593 | ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
594 | nexthop_set_resolved(afi, newhop, | |
595 | nexthop); | |
d62a17ae | 596 | } |
a8309422 DL |
597 | resolved = 1; |
598 | } | |
43e31305 JB |
599 | if (resolved && set) |
600 | re->nexthop_mtu = match->mtu; | |
34815ea3 DS |
601 | if (!resolved && IS_ZEBRA_DEBUG_RIB_DETAILED) |
602 | zlog_debug("\t%s: Recursion failed to find", | |
603 | __PRETTY_FUNCTION__); | |
d62a17ae | 604 | return resolved; |
605 | } else if (re->type == ZEBRA_ROUTE_STATIC) { | |
606 | resolved = 0; | |
7ee30f28 | 607 | for (ALL_NEXTHOPS(match->ng, newhop)) { |
677c1dd5 DS |
608 | if (!CHECK_FLAG(match->status, |
609 | ROUTE_ENTRY_INSTALLED)) | |
a8309422 | 610 | continue; |
6c47d399 DS |
611 | if (CHECK_FLAG(newhop->flags, |
612 | NEXTHOP_FLAG_RECURSIVE)) | |
613 | continue; | |
a8309422 DL |
614 | |
615 | if (set) { | |
616 | SET_FLAG(nexthop->flags, | |
617 | NEXTHOP_FLAG_RECURSIVE); | |
618 | nexthop_set_resolved(afi, newhop, | |
619 | nexthop); | |
d62a17ae | 620 | } |
a8309422 DL |
621 | resolved = 1; |
622 | } | |
d62a17ae | 623 | if (resolved && set) |
624 | re->nexthop_mtu = match->mtu; | |
34815ea3 DS |
625 | |
626 | if (!resolved && IS_ZEBRA_DEBUG_RIB_DETAILED) | |
627 | zlog_debug( | |
628 | "\t%s: Static route unable to resolve", | |
629 | __PRETTY_FUNCTION__); | |
d62a17ae | 630 | return resolved; |
631 | } else { | |
7939ff76 DS |
632 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { |
633 | zlog_debug("\t%s: Route Type %s has not turned on recursion", | |
634 | __PRETTY_FUNCTION__, | |
635 | zebra_route_string(re->type)); | |
636 | if (re->type == ZEBRA_ROUTE_BGP && | |
637 | !CHECK_FLAG(re->flags, ZEBRA_FLAG_IBGP)) | |
638 | zlog_debug("\tEBGP: see \"disable-ebgp-connected-route-check\" or \"disable-connected-check\""); | |
639 | } | |
d62a17ae | 640 | return 0; |
641 | } | |
718e3744 | 642 | } |
7939ff76 DS |
643 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
644 | zlog_debug("\t%s: Nexthop did not lookup in table", | |
645 | __PRETTY_FUNCTION__); | |
d62a17ae | 646 | return 0; |
718e3744 | 647 | } |
718e3744 | 648 | |
d62a17ae | 649 | struct route_entry *rib_match(afi_t afi, safi_t safi, vrf_id_t vrf_id, |
650 | union g_addr *addr, struct route_node **rn_out) | |
651 | { | |
652 | struct prefix p; | |
653 | struct route_table *table; | |
654 | struct route_node *rn; | |
5f7a4718 | 655 | struct route_entry *match = NULL; |
d62a17ae | 656 | |
657 | /* Lookup table. */ | |
658 | table = zebra_vrf_table(afi, safi, vrf_id); | |
659 | if (!table) | |
660 | return 0; | |
661 | ||
662 | memset(&p, 0, sizeof(struct prefix)); | |
663 | p.family = afi; | |
664 | if (afi == AFI_IP) { | |
665 | p.u.prefix4 = addr->ipv4; | |
666 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
667 | } else { | |
668 | p.u.prefix6 = addr->ipv6; | |
669 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
670 | } | |
718e3744 | 671 | |
d62a17ae | 672 | rn = route_node_match(table, (struct prefix *)&p); |
718e3744 | 673 | |
d62a17ae | 674 | while (rn) { |
5f7a4718 DS |
675 | rib_dest_t *dest; |
676 | ||
d62a17ae | 677 | route_unlock_node(rn); |
718e3744 | 678 | |
5f7a4718 | 679 | dest = rib_dest_from_rnode(rn); |
996c9314 LB |
680 | if (dest && dest->selected_fib |
681 | && !CHECK_FLAG(dest->selected_fib->status, | |
682 | ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 683 | match = dest->selected_fib; |
718e3744 | 684 | |
d62a17ae | 685 | /* If there is no selected route or matched route is EGP, go up |
686 | tree. */ | |
687 | if (!match) { | |
688 | do { | |
689 | rn = rn->parent; | |
690 | } while (rn && rn->info == NULL); | |
691 | if (rn) | |
692 | route_lock_node(rn); | |
693 | } else { | |
694 | if (match->type != ZEBRA_ROUTE_CONNECT) { | |
677c1dd5 DS |
695 | if (!CHECK_FLAG(match->status, |
696 | ROUTE_ENTRY_INSTALLED)) | |
d62a17ae | 697 | return NULL; |
698 | } | |
699 | ||
700 | if (rn_out) | |
701 | *rn_out = rn; | |
702 | return match; | |
703 | } | |
16814f96 | 704 | } |
d62a17ae | 705 | return NULL; |
706 | } | |
707 | ||
708 | struct route_entry *rib_match_ipv4_multicast(vrf_id_t vrf_id, | |
709 | struct in_addr addr, | |
710 | struct route_node **rn_out) | |
711 | { | |
712 | struct route_entry *re = NULL, *mre = NULL, *ure = NULL; | |
713 | struct route_node *m_rn = NULL, *u_rn = NULL; | |
714 | union g_addr gaddr = {.ipv4 = addr}; | |
715 | ||
716 | switch (ipv4_multicast_mode) { | |
717 | case MCAST_MRIB_ONLY: | |
718 | return rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
719 | rn_out); | |
720 | case MCAST_URIB_ONLY: | |
721 | return rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, rn_out); | |
722 | case MCAST_NO_CONFIG: | |
723 | case MCAST_MIX_MRIB_FIRST: | |
724 | re = mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
725 | &m_rn); | |
726 | if (!mre) | |
727 | re = ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, | |
728 | &gaddr, &u_rn); | |
729 | break; | |
730 | case MCAST_MIX_DISTANCE: | |
731 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
732 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
733 | if (mre && ure) | |
734 | re = ure->distance < mre->distance ? ure : mre; | |
735 | else if (mre) | |
736 | re = mre; | |
737 | else if (ure) | |
738 | re = ure; | |
739 | break; | |
740 | case MCAST_MIX_PFXLEN: | |
741 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
742 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
743 | if (mre && ure) | |
744 | re = u_rn->p.prefixlen > m_rn->p.prefixlen ? ure : mre; | |
745 | else if (mre) | |
746 | re = mre; | |
747 | else if (ure) | |
748 | re = ure; | |
749 | break; | |
718e3744 | 750 | } |
33550aa8 | 751 | |
d62a17ae | 752 | if (rn_out) |
753 | *rn_out = (re == mre) ? m_rn : u_rn; | |
718e3744 | 754 | |
d62a17ae | 755 | if (IS_ZEBRA_DEBUG_RIB) { |
756 | char buf[BUFSIZ]; | |
757 | inet_ntop(AF_INET, &addr, buf, BUFSIZ); | |
4623d897 | 758 | |
32391aff DS |
759 | zlog_debug("%s: %s: vrf: %u found %s, using %s", |
760 | __func__, buf, vrf_id, | |
d62a17ae | 761 | mre ? (ure ? "MRIB+URIB" : "MRIB") |
762 | : ure ? "URIB" : "nothing", | |
763 | re == ure ? "URIB" : re == mre ? "MRIB" : "none"); | |
764 | } | |
765 | return re; | |
4623d897 DL |
766 | } |
767 | ||
d62a17ae | 768 | void multicast_mode_ipv4_set(enum multicast_mode mode) |
4623d897 | 769 | { |
d62a17ae | 770 | if (IS_ZEBRA_DEBUG_RIB) |
771 | zlog_debug("%s: multicast lookup mode set (%d)", __func__, | |
772 | mode); | |
773 | ipv4_multicast_mode = mode; | |
4623d897 DL |
774 | } |
775 | ||
d62a17ae | 776 | enum multicast_mode multicast_mode_ipv4_get(void) |
4623d897 | 777 | { |
d62a17ae | 778 | return ipv4_multicast_mode; |
4623d897 DL |
779 | } |
780 | ||
d62a17ae | 781 | struct route_entry *rib_lookup_ipv4(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 782 | { |
d62a17ae | 783 | struct route_table *table; |
784 | struct route_node *rn; | |
5f7a4718 | 785 | struct route_entry *match = NULL; |
5f7a4718 | 786 | rib_dest_t *dest; |
718e3744 | 787 | |
d62a17ae | 788 | /* Lookup table. */ |
789 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
790 | if (!table) | |
791 | return 0; | |
718e3744 | 792 | |
d62a17ae | 793 | rn = route_node_lookup(table, (struct prefix *)p); |
718e3744 | 794 | |
d62a17ae | 795 | /* No route for this prefix. */ |
796 | if (!rn) | |
797 | return NULL; | |
718e3744 | 798 | |
d62a17ae | 799 | /* Unlock node. */ |
800 | route_unlock_node(rn); | |
5f7a4718 | 801 | dest = rib_dest_from_rnode(rn); |
718e3744 | 802 | |
996c9314 LB |
803 | if (dest && dest->selected_fib |
804 | && !CHECK_FLAG(dest->selected_fib->status, ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 805 | match = dest->selected_fib; |
718e3744 | 806 | |
d62a17ae | 807 | if (!match) |
808 | return NULL; | |
718e3744 | 809 | |
d62a17ae | 810 | if (match->type == ZEBRA_ROUTE_CONNECT) |
811 | return match; | |
f9e1b38e | 812 | |
677c1dd5 DS |
813 | if (CHECK_FLAG(match->status, ROUTE_ENTRY_INSTALLED)) |
814 | return match; | |
718e3744 | 815 | |
d62a17ae | 816 | return NULL; |
718e3744 | 817 | } |
818 | ||
d62a17ae | 819 | #define RIB_SYSTEM_ROUTE(R) \ |
820 | ((R)->type == ZEBRA_ROUTE_KERNEL || (R)->type == ZEBRA_ROUTE_CONNECT) | |
7514fb77 | 821 | |
212df1de PG |
822 | #define RIB_KERNEL_ROUTE(R) \ |
823 | ((R)->type == ZEBRA_ROUTE_KERNEL) | |
824 | ||
dc95824a DO |
825 | /* This function verifies reachability of one given nexthop, which can be |
826 | * numbered or unnumbered, IPv4 or IPv6. The result is unconditionally stored | |
827 | * in nexthop->flags field. If the 4th parameter, 'set', is non-zero, | |
828 | * nexthop->ifindex will be updated appropriately as well. | |
829 | * An existing route map can turn (otherwise active) nexthop into inactive, but | |
830 | * not vice versa. | |
831 | * | |
832 | * The return value is the final value of 'ACTIVE' flag. | |
833 | */ | |
834 | ||
d62a17ae | 835 | static unsigned nexthop_active_check(struct route_node *rn, |
836 | struct route_entry *re, | |
0dddbf72 | 837 | struct nexthop *nexthop, bool set) |
d62a17ae | 838 | { |
839 | struct interface *ifp; | |
840 | route_map_result_t ret = RMAP_MATCH; | |
841 | int family; | |
842 | char buf[SRCDEST2STR_BUFFER]; | |
86391e56 | 843 | const struct prefix *p, *src_p; |
ac6eebce | 844 | struct zebra_vrf *zvrf; |
845 | ||
d62a17ae | 846 | srcdest_rnode_prefixes(rn, &p, &src_p); |
847 | ||
848 | if (rn->p.family == AF_INET) | |
849 | family = AFI_IP; | |
850 | else if (rn->p.family == AF_INET6) | |
851 | family = AFI_IP6; | |
852 | else | |
853 | family = 0; | |
854 | switch (nexthop->type) { | |
855 | case NEXTHOP_TYPE_IFINDEX: | |
4a7371e9 | 856 | ifp = if_lookup_by_index(nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 857 | if (ifp && if_is_operative(ifp)) |
858 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
859 | else | |
860 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
861 | break; | |
862 | case NEXTHOP_TYPE_IPV4: | |
863 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
864 | family = AFI_IP; | |
1ec31309 | 865 | if (nexthop_active(AFI_IP, re, nexthop, set, rn)) |
d62a17ae | 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: | |
871 | family = AFI_IP6; | |
872 | if (nexthop_active(AFI_IP6, re, nexthop, set, rn)) | |
873 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
874 | else | |
875 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
876 | break; | |
877 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
878 | /* RFC 5549, v4 prefix with v6 NH */ | |
879 | if (rn->p.family != AF_INET) | |
880 | family = AFI_IP6; | |
881 | if (IN6_IS_ADDR_LINKLOCAL(&nexthop->gate.ipv6)) { | |
007dbee6 | 882 | ifp = if_lookup_by_index(nexthop->ifindex, |
4a7371e9 | 883 | nexthop->vrf_id); |
d62a17ae | 884 | if (ifp && if_is_operative(ifp)) |
885 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
886 | else | |
887 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
888 | } else { | |
889 | if (nexthop_active(AFI_IP6, re, nexthop, set, rn)) | |
890 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
891 | else | |
892 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
893 | } | |
894 | break; | |
895 | case NEXTHOP_TYPE_BLACKHOLE: | |
896 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
897 | break; | |
898 | default: | |
899 | break; | |
900 | } | |
34815ea3 DS |
901 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) { |
902 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
903 | zlog_debug("\t%s: Unable to find a active nexthop", | |
904 | __PRETTY_FUNCTION__); | |
d62a17ae | 905 | return 0; |
34815ea3 | 906 | } |
d62a17ae | 907 | |
908 | /* XXX: What exactly do those checks do? Do we support | |
ac6eebce | 909 | * e.g. IPv4 routes with IPv6 nexthops or vice versa? |
910 | */ | |
d62a17ae | 911 | if (RIB_SYSTEM_ROUTE(re) || (family == AFI_IP && p->family != AF_INET) |
912 | || (family == AFI_IP6 && p->family != AF_INET6)) | |
913 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
914 | ||
915 | /* The original code didn't determine the family correctly | |
916 | * e.g. for NEXTHOP_TYPE_IFINDEX. Retrieve the correct afi | |
917 | * from the rib_table_info in those cases. | |
918 | * Possibly it may be better to use only the rib_table_info | |
919 | * in every case. | |
920 | */ | |
921 | if (!family) { | |
922 | rib_table_info_t *info; | |
923 | ||
924 | info = srcdest_rnode_table_info(rn); | |
925 | family = info->afi; | |
718e3744 | 926 | } |
c52ef59f | 927 | |
d62a17ae | 928 | memset(&nexthop->rmap_src.ipv6, 0, sizeof(union g_addr)); |
929 | ||
ac6eebce | 930 | zvrf = zebra_vrf_lookup_by_id(nexthop->vrf_id); |
931 | if (!zvrf) { | |
932 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
933 | zlog_debug("\t%s: zvrf is NULL", __PRETTY_FUNCTION__); | |
934 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
935 | } | |
936 | ||
d62a17ae | 937 | /* It'll get set if required inside */ |
ac6eebce | 938 | ret = zebra_route_map_check(family, re->type, re->instance, p, |
939 | nexthop, zvrf, re->tag); | |
d62a17ae | 940 | if (ret == RMAP_DENYMATCH) { |
941 | if (IS_ZEBRA_DEBUG_RIB) { | |
942 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
943 | zlog_debug( | |
944 | "%u:%s: Filtering out with NH out %s due to route map", | |
945 | re->vrf_id, buf, | |
99b9d960 | 946 | ifindex2ifname(nexthop->ifindex, |
4a7371e9 | 947 | nexthop->vrf_id)); |
d62a17ae | 948 | } |
949 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
518f0eb1 | 950 | } |
d62a17ae | 951 | return CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); |
718e3744 | 952 | } |
953 | ||
03e232a4 | 954 | /* Iterate over all nexthops of the given RIB entry and refresh their |
f0f77c9a DS |
955 | * ACTIVE flag. re->nexthop_active_num is updated accordingly. If any |
956 | * nexthop is found to toggle the ACTIVE flag, the whole re structure | |
957 | * is flagged with ROUTE_ENTRY_CHANGED. The 4th 'set' argument is | |
03e232a4 DO |
958 | * transparently passed to nexthop_active_check(). |
959 | * | |
960 | * Return value is the new number of active nexthops. | |
961 | */ | |
962 | ||
d62a17ae | 963 | static int nexthop_active_update(struct route_node *rn, struct route_entry *re, |
0dddbf72 | 964 | bool set) |
d62a17ae | 965 | { |
966 | struct nexthop *nexthop; | |
967 | union g_addr prev_src; | |
968 | unsigned int prev_active, new_active, old_num_nh; | |
969 | ifindex_t prev_index; | |
ac6eebce | 970 | |
d62a17ae | 971 | old_num_nh = re->nexthop_active_num; |
972 | ||
973 | re->nexthop_active_num = 0; | |
974 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
975 | ||
7ee30f28 | 976 | for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) { |
d62a17ae | 977 | /* No protocol daemon provides src and so we're skipping |
978 | * tracking it */ | |
979 | prev_src = nexthop->rmap_src; | |
980 | prev_active = CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
981 | prev_index = nexthop->ifindex; | |
220f0f42 DS |
982 | /* |
983 | * We need to respect the multipath_num here | |
984 | * as that what we should be able to install from | |
985 | * a multipath perpsective should not be a data plane | |
986 | * decision point. | |
987 | */ | |
988 | new_active = nexthop_active_check(rn, re, nexthop, set); | |
989 | if (new_active && re->nexthop_active_num >= multipath_num) { | |
990 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
991 | new_active = 0; | |
992 | } | |
993 | if (new_active) | |
d62a17ae | 994 | re->nexthop_active_num++; |
995 | /* Don't allow src setting on IPv6 addr for now */ | |
996 | if (prev_active != new_active || prev_index != nexthop->ifindex | |
997 | || ((nexthop->type >= NEXTHOP_TYPE_IFINDEX | |
998 | && nexthop->type < NEXTHOP_TYPE_IPV6) | |
999 | && prev_src.ipv4.s_addr | |
1000 | != nexthop->rmap_src.ipv4.s_addr) | |
1001 | || ((nexthop->type >= NEXTHOP_TYPE_IPV6 | |
1002 | && nexthop->type < NEXTHOP_TYPE_BLACKHOLE) | |
1003 | && !(IPV6_ADDR_SAME(&prev_src.ipv6, | |
1004 | &nexthop->rmap_src.ipv6)))) { | |
1005 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
1006 | SET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | if (old_num_nh != re->nexthop_active_num) | |
1011 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
6e26278c | 1012 | |
d62a17ae | 1013 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED)) { |
1014 | SET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
1015 | } | |
1016 | ||
1017 | return re->nexthop_active_num; | |
718e3744 | 1018 | } |
6baeb988 | 1019 | |
a64448ba DS |
1020 | /* |
1021 | * Is this RIB labeled-unicast? It must be of type BGP and all paths | |
1022 | * (nexthops) must have a label. | |
1023 | */ | |
d62a17ae | 1024 | int zebra_rib_labeled_unicast(struct route_entry *re) |
a64448ba | 1025 | { |
d62a17ae | 1026 | struct nexthop *nexthop = NULL; |
a64448ba | 1027 | |
d62a17ae | 1028 | if (re->type != ZEBRA_ROUTE_BGP) |
1029 | return 0; | |
a64448ba | 1030 | |
7ee30f28 | 1031 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
d62a17ae | 1032 | if (!nexthop->nh_label || !nexthop->nh_label->num_labels) |
1033 | return 0; | |
6b0655a2 | 1034 | |
d62a17ae | 1035 | return 1; |
a64448ba | 1036 | } |
718e3744 | 1037 | |
6ae24471 DS |
1038 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
1039 | * is only used for IPv4. | |
1040 | */ | |
0c555cc6 DS |
1041 | void rib_install_kernel(struct route_node *rn, struct route_entry *re, |
1042 | struct route_entry *old) | |
718e3744 | 1043 | { |
d62a17ae | 1044 | struct nexthop *nexthop; |
1045 | rib_table_info_t *info = srcdest_rnode_table_info(rn); | |
d62a17ae | 1046 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
97f5b441 MS |
1047 | const struct prefix *p, *src_p; |
1048 | enum zebra_dplane_result ret; | |
1049 | ||
1050 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
718e3744 | 1051 | |
d62a17ae | 1052 | srcdest_rnode_prefixes(rn, &p, &src_p); |
416ec78d | 1053 | |
d62a17ae | 1054 | if (info->safi != SAFI_UNICAST) { |
7ee30f28 | 1055 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
d62a17ae | 1056 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 1057 | return; |
25b9cb0c DL |
1058 | } else { |
1059 | struct nexthop *prev; | |
1060 | ||
7ee30f28 | 1061 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
25b9cb0c | 1062 | UNSET_FLAG (nexthop->flags, NEXTHOP_FLAG_DUPLICATE); |
7ee30f28 | 1063 | for (ALL_NEXTHOPS(re->ng, prev)) { |
25b9cb0c DL |
1064 | if (prev == nexthop) |
1065 | break; | |
996c9314 LB |
1066 | if (nexthop_same_firsthop(nexthop, prev)) { |
1067 | SET_FLAG(nexthop->flags, | |
1068 | NEXTHOP_FLAG_DUPLICATE); | |
25b9cb0c DL |
1069 | break; |
1070 | } | |
1071 | } | |
1072 | } | |
d62a17ae | 1073 | } |
718e3744 | 1074 | |
2063a814 DS |
1075 | /* |
1076 | * If this is a replace to a new RE let the originator of the RE | |
1077 | * know that they've lost | |
1078 | */ | |
9a9f8926 | 1079 | if (old && (old != re) && (old->type != re->type)) |
28610f7e | 1080 | zsend_route_notify_owner(old, p, ZAPI_ROUTE_BETTER_ADMIN_WON); |
25b9cb0c | 1081 | |
97f5b441 MS |
1082 | /* Update fib selection */ |
1083 | dest->selected_fib = re; | |
1084 | ||
d62a17ae | 1085 | /* |
1086 | * Make sure we update the FPM any time we send new information to | |
1087 | * the kernel. | |
1088 | */ | |
1089 | hook_call(rib_update, rn, "installing in kernel"); | |
97f5b441 MS |
1090 | |
1091 | /* Send add or update */ | |
8263d1d0 | 1092 | if (old) |
97f5b441 | 1093 | ret = dplane_route_update(rn, re, old); |
5709131c | 1094 | else |
97f5b441 | 1095 | ret = dplane_route_add(rn, re); |
97f5b441 MS |
1096 | |
1097 | switch (ret) { | |
ea1c14f6 | 1098 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
60f98b23 DS |
1099 | SET_FLAG(re->status, ROUTE_ENTRY_QUEUED); |
1100 | if (old) | |
1101 | SET_FLAG(old->status, ROUTE_ENTRY_QUEUED); | |
97f5b441 MS |
1102 | if (zvrf) |
1103 | zvrf->installs_queued++; | |
1e885672 | 1104 | break; |
ea1c14f6 | 1105 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
97f5b441 MS |
1106 | { |
1107 | char str[SRCDEST2STR_BUFFER]; | |
1108 | ||
1109 | srcdest_rnode2str(rn, str, sizeof(str)); | |
1110 | flog_err(EC_ZEBRA_DP_INSTALL_FAIL, | |
1111 | "%u:%s: Failed to enqueue dataplane install", | |
1112 | re->vrf_id, str); | |
1e885672 | 1113 | break; |
97f5b441 | 1114 | } |
ea1c14f6 | 1115 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
97f5b441 MS |
1116 | if (zvrf) |
1117 | zvrf->installs++; | |
1e885672 DS |
1118 | break; |
1119 | } | |
d62a17ae | 1120 | |
0c555cc6 | 1121 | return; |
718e3744 | 1122 | } |
1123 | ||
1124 | /* Uninstall the route from kernel. */ | |
0c555cc6 | 1125 | void rib_uninstall_kernel(struct route_node *rn, struct route_entry *re) |
718e3744 | 1126 | { |
d62a17ae | 1127 | struct nexthop *nexthop; |
1128 | rib_table_info_t *info = srcdest_rnode_table_info(rn); | |
d62a17ae | 1129 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
05737783 | 1130 | |
d62a17ae | 1131 | if (info->safi != SAFI_UNICAST) { |
677c1dd5 | 1132 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
7ee30f28 | 1133 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
d6792f9d | 1134 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 1135 | return; |
d62a17ae | 1136 | } |
416ec78d | 1137 | |
d62a17ae | 1138 | /* |
1139 | * Make sure we update the FPM any time we send new information to | |
97f5b441 | 1140 | * the dataplane. |
d62a17ae | 1141 | */ |
1142 | hook_call(rib_update, rn, "uninstalling from kernel"); | |
97f5b441 MS |
1143 | |
1144 | switch (dplane_route_delete(rn, re)) { | |
ea1c14f6 | 1145 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
97f5b441 MS |
1146 | if (zvrf) |
1147 | zvrf->removals_queued++; | |
1e885672 | 1148 | break; |
ea1c14f6 | 1149 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
97f5b441 MS |
1150 | { |
1151 | char str[SRCDEST2STR_BUFFER]; | |
1152 | ||
1153 | srcdest_rnode2str(rn, str, sizeof(str)); | |
1154 | flog_err(EC_ZEBRA_DP_INSTALL_FAIL, | |
1155 | "%u:%s: Failed to enqueue dataplane uninstall", | |
1156 | re->vrf_id, str); | |
1e885672 | 1157 | break; |
97f5b441 | 1158 | } |
ea1c14f6 | 1159 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
1e885672 DS |
1160 | if (zvrf) |
1161 | zvrf->removals++; | |
1162 | break; | |
1163 | } | |
718e3744 | 1164 | |
0c555cc6 | 1165 | return; |
718e3744 | 1166 | } |
1167 | ||
1168 | /* Uninstall the route from kernel. */ | |
d62a17ae | 1169 | static void rib_uninstall(struct route_node *rn, struct route_entry *re) |
718e3744 | 1170 | { |
d62a17ae | 1171 | rib_table_info_t *info = srcdest_rnode_table_info(rn); |
5f7a4718 | 1172 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
97f5b441 | 1173 | struct nexthop *nexthop; |
416ec78d | 1174 | |
5f7a4718 | 1175 | if (dest && dest->selected_fib == re) { |
d62a17ae | 1176 | if (info->safi == SAFI_UNICAST) |
1177 | hook_call(rib_update, rn, "rib_uninstall"); | |
5adc2528 | 1178 | |
d62a17ae | 1179 | /* If labeled-unicast route, uninstall transit LSP. */ |
1180 | if (zebra_rib_labeled_unicast(re)) | |
1181 | zebra_mpls_lsp_uninstall(info->zvrf, rn, re); | |
7cdb1a84 MS |
1182 | |
1183 | if (!RIB_SYSTEM_ROUTE(re)) | |
1184 | rib_uninstall_kernel(rn, re); | |
677c1dd5 DS |
1185 | else |
1186 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
97f5b441 MS |
1187 | |
1188 | dest->selected_fib = NULL; | |
1189 | ||
1190 | for (ALL_NEXTHOPS(re->ng, nexthop)) | |
1191 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
d62a17ae | 1192 | } |
446bb95e | 1193 | |
d62a17ae | 1194 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { |
86391e56 MS |
1195 | const struct prefix *p, *src_p; |
1196 | ||
d62a17ae | 1197 | srcdest_rnode_prefixes(rn, &p, &src_p); |
05737783 | 1198 | |
d62a17ae | 1199 | redistribute_delete(p, src_p, re); |
1200 | UNSET_FLAG(re->flags, ZEBRA_FLAG_SELECTED); | |
1201 | } | |
718e3744 | 1202 | } |
1203 | ||
9fd92e3c AS |
1204 | /* |
1205 | * rib_can_delete_dest | |
1206 | * | |
1207 | * Returns TRUE if the given dest can be deleted from the table. | |
1208 | */ | |
d62a17ae | 1209 | static int rib_can_delete_dest(rib_dest_t *dest) |
9fd92e3c | 1210 | { |
d62a17ae | 1211 | if (dest->routes) { |
1212 | return 0; | |
1213 | } | |
9fd92e3c | 1214 | |
d62a17ae | 1215 | /* |
1216 | * Don't delete the dest if we have to update the FPM about this | |
1217 | * prefix. | |
1218 | */ | |
1219 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_FPM) | |
1220 | || CHECK_FLAG(dest->flags, RIB_DEST_SENT_TO_FPM)) | |
1221 | return 0; | |
5adc2528 | 1222 | |
d62a17ae | 1223 | return 1; |
9fd92e3c AS |
1224 | } |
1225 | ||
1226 | /* | |
1227 | * rib_gc_dest | |
1228 | * | |
1229 | * Garbage collect the rib dest corresponding to the given route node | |
1230 | * if appropriate. | |
1231 | * | |
1232 | * Returns TRUE if the dest was deleted, FALSE otherwise. | |
1233 | */ | |
d62a17ae | 1234 | int rib_gc_dest(struct route_node *rn) |
9fd92e3c | 1235 | { |
d62a17ae | 1236 | rib_dest_t *dest; |
9fd92e3c | 1237 | |
d62a17ae | 1238 | dest = rib_dest_from_rnode(rn); |
1239 | if (!dest) | |
1240 | return 0; | |
9fd92e3c | 1241 | |
d62a17ae | 1242 | if (!rib_can_delete_dest(dest)) |
1243 | return 0; | |
9fd92e3c | 1244 | |
c9abf558 DS |
1245 | if (IS_ZEBRA_DEBUG_RIB) { |
1246 | struct zebra_vrf *zvrf; | |
1247 | ||
1248 | zvrf = rib_dest_vrf(dest); | |
d62a17ae | 1249 | rnode_debug(rn, zvrf_id(zvrf), "removing dest from table"); |
c9abf558 | 1250 | } |
9fd92e3c | 1251 | |
d62a17ae | 1252 | dest->rnode = NULL; |
1253 | XFREE(MTYPE_RIB_DEST, dest); | |
1254 | rn->info = NULL; | |
9fd92e3c | 1255 | |
d62a17ae | 1256 | /* |
1257 | * Release the one reference that we keep on the route node. | |
1258 | */ | |
1259 | route_unlock_node(rn); | |
1260 | return 1; | |
9fd92e3c AS |
1261 | } |
1262 | ||
d62a17ae | 1263 | static void rib_process_add_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
1264 | struct route_entry *new) | |
3e5c6e00 | 1265 | { |
5f7a4718 DS |
1266 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
1267 | ||
d62a17ae | 1268 | hook_call(rib_update, rn, "new route selected"); |
3e5c6e00 | 1269 | |
d62a17ae | 1270 | /* Update real nexthop. This may actually determine if nexthop is active |
1271 | * or not. */ | |
0dddbf72 | 1272 | if (!nexthop_active_update(rn, new, true)) { |
d62a17ae | 1273 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
1274 | return; | |
1275 | } | |
3e5c6e00 | 1276 | |
d62a17ae | 1277 | if (IS_ZEBRA_DEBUG_RIB) { |
1278 | char buf[SRCDEST2STR_BUFFER]; | |
1279 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
2da33d6b DS |
1280 | zlog_debug("%u:%s: Adding route rn %p, re %p (%s)", |
1281 | zvrf_id(zvrf), buf, rn, new, | |
1282 | zebra_route_string(new->type)); | |
d62a17ae | 1283 | } |
3e5c6e00 | 1284 | |
d62a17ae | 1285 | /* If labeled-unicast route, install transit LSP. */ |
1286 | if (zebra_rib_labeled_unicast(new)) | |
1287 | zebra_mpls_lsp_install(zvrf, rn, new); | |
a64448ba | 1288 | |
0c555cc6 DS |
1289 | if (!RIB_SYSTEM_ROUTE(new)) |
1290 | rib_install_kernel(rn, new, NULL); | |
ed216282 DS |
1291 | else |
1292 | dest->selected_fib = new; | |
3e5c6e00 | 1293 | |
d62a17ae | 1294 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
3e5c6e00 | 1295 | } |
1296 | ||
d62a17ae | 1297 | static void rib_process_del_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
1298 | struct route_entry *old) | |
3e5c6e00 | 1299 | { |
5f7a4718 | 1300 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
d62a17ae | 1301 | hook_call(rib_update, rn, "removing existing route"); |
3e5c6e00 | 1302 | |
d62a17ae | 1303 | /* Uninstall from kernel. */ |
1304 | if (IS_ZEBRA_DEBUG_RIB) { | |
1305 | char buf[SRCDEST2STR_BUFFER]; | |
1306 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
2da33d6b DS |
1307 | zlog_debug("%u:%s: Deleting route rn %p, re %p (%s)", |
1308 | zvrf_id(zvrf), buf, rn, old, | |
1309 | zebra_route_string(old->type)); | |
d62a17ae | 1310 | } |
3e5c6e00 | 1311 | |
d62a17ae | 1312 | /* If labeled-unicast route, uninstall transit LSP. */ |
1313 | if (zebra_rib_labeled_unicast(old)) | |
1314 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
1315 | ||
1316 | if (!RIB_SYSTEM_ROUTE(old)) | |
1317 | rib_uninstall_kernel(rn, old); | |
ed216282 | 1318 | else { |
677c1dd5 | 1319 | UNSET_FLAG(old->status, ROUTE_ENTRY_INSTALLED); |
ed216282 DS |
1320 | /* |
1321 | * We are setting this to NULL here | |
1322 | * because that is what we traditionally | |
1323 | * have been doing. I am not positive | |
1324 | * that this is the right thing to do | |
1325 | * but let's leave the code alone | |
1326 | * for the RIB_SYSTEM_ROUTE case | |
1327 | */ | |
1328 | dest->selected_fib = NULL; | |
1329 | } | |
d62a17ae | 1330 | |
1331 | /* Update nexthop for route, reset changed flag. */ | |
ef57f35f DL |
1332 | /* Note: this code also handles the Linux case when an interface goes |
1333 | * down, causing the kernel to delete routes without sending DELROUTE | |
1334 | * notifications | |
1335 | */ | |
0dddbf72 | 1336 | if (!nexthop_active_update(rn, old, true) && |
212df1de PG |
1337 | (RIB_KERNEL_ROUTE(old))) |
1338 | SET_FLAG(old->status, ROUTE_ENTRY_REMOVED); | |
1339 | else | |
1340 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); | |
d62a17ae | 1341 | } |
1342 | ||
1343 | static void rib_process_update_fib(struct zebra_vrf *zvrf, | |
1344 | struct route_node *rn, | |
1345 | struct route_entry *old, | |
1346 | struct route_entry *new) | |
1347 | { | |
1348 | struct nexthop *nexthop = NULL; | |
1349 | int nh_active = 0; | |
5f7a4718 | 1350 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
d62a17ae | 1351 | |
1352 | /* | |
1353 | * We have to install or update if a new route has been selected or | |
1354 | * something has changed. | |
1355 | */ | |
1356 | if (new != old || CHECK_FLAG(new->status, ROUTE_ENTRY_CHANGED)) { | |
1357 | hook_call(rib_update, rn, "updating existing route"); | |
1358 | ||
1359 | /* Update the nexthop; we could determine here that nexthop is | |
1360 | * inactive. */ | |
0dddbf72 | 1361 | if (nexthop_active_update(rn, new, true)) |
d62a17ae | 1362 | nh_active = 1; |
1363 | ||
1364 | /* If nexthop is active, install the selected route, if | |
1365 | * appropriate. If | |
1366 | * the install succeeds, cleanup flags for prior route, if | |
1367 | * different from | |
1368 | * newly selected. | |
1369 | */ | |
1370 | if (nh_active) { | |
1371 | if (IS_ZEBRA_DEBUG_RIB) { | |
1372 | char buf[SRCDEST2STR_BUFFER]; | |
1373 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1374 | if (new != old) | |
1375 | zlog_debug( | |
2da33d6b | 1376 | "%u:%s: Updating route rn %p, re %p (%s) old %p (%s)", |
d62a17ae | 1377 | zvrf_id(zvrf), buf, rn, new, |
2da33d6b DS |
1378 | zebra_route_string(new->type), |
1379 | old, | |
1380 | zebra_route_string(old->type)); | |
d62a17ae | 1381 | else |
1382 | zlog_debug( | |
2da33d6b | 1383 | "%u:%s: Updating route rn %p, re %p (%s)", |
d62a17ae | 1384 | zvrf_id(zvrf), buf, rn, new, |
2da33d6b | 1385 | zebra_route_string(new->type)); |
d62a17ae | 1386 | } |
1387 | ||
1388 | /* If labeled-unicast route, uninstall transit LSP. */ | |
1389 | if (zebra_rib_labeled_unicast(old)) | |
1390 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
1391 | ||
1392 | /* Non-system route should be installed. */ | |
1393 | if (!RIB_SYSTEM_ROUTE(new)) { | |
1394 | /* If labeled-unicast route, install transit | |
1395 | * LSP. */ | |
1396 | if (zebra_rib_labeled_unicast(new)) | |
1397 | zebra_mpls_lsp_install(zvrf, rn, new); | |
1398 | ||
0c555cc6 | 1399 | rib_install_kernel(rn, new, old); |
ed216282 | 1400 | } else { |
677c1dd5 | 1401 | UNSET_FLAG(new->status, ROUTE_ENTRY_INSTALLED); |
ed216282 DS |
1402 | /* |
1403 | * We do not need to install the | |
1404 | * selected route because it | |
1405 | * is already isntalled by | |
1406 | * the system( ie not us ) | |
1407 | * so just mark it as winning | |
1408 | * we do need to ensure that | |
1409 | * if we uninstall a route | |
1410 | * from ourselves we don't | |
1411 | * over write this pointer | |
1412 | */ | |
1413 | dest->selected_fib = NULL; | |
d62a17ae | 1414 | } |
d62a17ae | 1415 | /* If install succeeded or system route, cleanup flags |
1416 | * for prior route. */ | |
ed216282 | 1417 | if (new != old) { |
d62a17ae | 1418 | if (RIB_SYSTEM_ROUTE(new)) { |
1419 | if (!RIB_SYSTEM_ROUTE(old)) | |
1420 | rib_uninstall_kernel(rn, old); | |
677c1dd5 DS |
1421 | else |
1422 | UNSET_FLAG( | |
1423 | old->status, | |
1424 | ROUTE_ENTRY_INSTALLED); | |
d62a17ae | 1425 | } else { |
677c1dd5 DS |
1426 | UNSET_FLAG(old->status, |
1427 | ROUTE_ENTRY_INSTALLED); | |
7ee30f28 | 1428 | for (nexthop = old->ng.nexthop; nexthop; |
d62a17ae | 1429 | nexthop = nexthop->next) |
1430 | UNSET_FLAG(nexthop->flags, | |
1431 | NEXTHOP_FLAG_FIB); | |
1432 | } | |
1433 | } | |
d62a17ae | 1434 | } |
a64448ba | 1435 | |
d62a17ae | 1436 | /* |
1437 | * If nexthop for selected route is not active or install | |
1438 | * failed, we | |
1439 | * may need to uninstall and delete for redistribution. | |
1440 | */ | |
ed216282 | 1441 | if (!nh_active) { |
d62a17ae | 1442 | if (IS_ZEBRA_DEBUG_RIB) { |
1443 | char buf[SRCDEST2STR_BUFFER]; | |
1444 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
1445 | if (new != old) | |
1446 | zlog_debug( | |
2da33d6b | 1447 | "%u:%s: Deleting route rn %p, re %p (%s) old %p (%s) - nexthop inactive", |
d62a17ae | 1448 | zvrf_id(zvrf), buf, rn, new, |
2da33d6b DS |
1449 | zebra_route_string(new->type), |
1450 | old, | |
1451 | zebra_route_string(old->type)); | |
d62a17ae | 1452 | else |
1453 | zlog_debug( | |
2da33d6b | 1454 | "%u:%s: Deleting route rn %p, re %p (%s) - nexthop inactive", |
d62a17ae | 1455 | zvrf_id(zvrf), buf, rn, new, |
2da33d6b | 1456 | zebra_route_string(new->type)); |
d62a17ae | 1457 | } |
1458 | ||
1459 | /* If labeled-unicast route, uninstall transit LSP. */ | |
1460 | if (zebra_rib_labeled_unicast(old)) | |
1461 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
1462 | ||
1463 | if (!RIB_SYSTEM_ROUTE(old)) | |
1464 | rib_uninstall_kernel(rn, old); | |
677c1dd5 DS |
1465 | else { |
1466 | UNSET_FLAG(old->status, ROUTE_ENTRY_INSTALLED); | |
ed216282 | 1467 | dest->selected_fib = NULL; |
677c1dd5 | 1468 | } |
d62a17ae | 1469 | } |
1470 | } else { | |
1471 | /* | |
1472 | * Same route selected; check if in the FIB and if not, | |
1473 | * re-install. This | |
1474 | * is housekeeping code to deal with race conditions in kernel | |
1475 | * with linux | |
1476 | * netlink reporting interface up before IPv4 or IPv6 protocol | |
1477 | * is ready | |
1478 | * to add routes. | |
1479 | */ | |
677c1dd5 DS |
1480 | if (!RIB_SYSTEM_ROUTE(new) |
1481 | && !CHECK_FLAG(new->status, ROUTE_ENTRY_INSTALLED)) | |
1482 | rib_install_kernel(rn, new, NULL); | |
d62a17ae | 1483 | } |
1484 | ||
1485 | /* Update prior route. */ | |
1486 | if (new != old) { | |
d62a17ae | 1487 | /* Set real nexthop. */ |
0dddbf72 | 1488 | nexthop_active_update(rn, old, true); |
d62a17ae | 1489 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); |
1490 | } | |
3e5c6e00 | 1491 | |
d62a17ae | 1492 | /* Clear changed flag. */ |
1493 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); | |
3e5c6e00 | 1494 | } |
1495 | ||
d62a17ae | 1496 | /* Check if 'alternate' RIB entry is better than 'current'. */ |
1497 | static struct route_entry *rib_choose_best(struct route_entry *current, | |
1498 | struct route_entry *alternate) | |
1499 | { | |
1500 | if (current == NULL) | |
1501 | return alternate; | |
1502 | ||
1503 | /* filter route selection in following order: | |
1504 | * - connected beats other types | |
fec4ca19 | 1505 | * - if both connected, loopback or vrf wins |
d62a17ae | 1506 | * - lower distance beats higher |
1507 | * - lower metric beats higher for equal distance | |
1508 | * - last, hence oldest, route wins tie break. | |
1509 | */ | |
1510 | ||
fec4ca19 DS |
1511 | /* Connected routes. Check to see if either are a vrf |
1512 | * or loopback interface. If not, pick the last connected | |
d62a17ae | 1513 | * route of the set of lowest metric connected routes. |
1514 | */ | |
1515 | if (alternate->type == ZEBRA_ROUTE_CONNECT) { | |
fec4ca19 DS |
1516 | if (current->type != ZEBRA_ROUTE_CONNECT) |
1517 | return alternate; | |
1518 | ||
1519 | /* both are connected. are either loop or vrf? */ | |
1520 | struct nexthop *nexthop = NULL; | |
1521 | ||
1522 | for (ALL_NEXTHOPS(alternate->ng, nexthop)) { | |
1523 | if (if_is_loopback_or_vrf(if_lookup_by_index( | |
1524 | nexthop->ifindex, alternate->vrf_id))) | |
1525 | return alternate; | |
1526 | } | |
1527 | ||
1528 | for (ALL_NEXTHOPS(current->ng, nexthop)) { | |
1529 | if (if_is_loopback_or_vrf(if_lookup_by_index( | |
1530 | nexthop->ifindex, current->vrf_id))) | |
1531 | return current; | |
1532 | } | |
1533 | ||
1534 | /* Neither are loop or vrf so pick best metric */ | |
1535 | if (alternate->metric <= current->metric) | |
d62a17ae | 1536 | return alternate; |
1537 | ||
1538 | return current; | |
1539 | } | |
3e5c6e00 | 1540 | |
d62a17ae | 1541 | if (current->type == ZEBRA_ROUTE_CONNECT) |
1542 | return current; | |
3e5c6e00 | 1543 | |
d62a17ae | 1544 | /* higher distance loses */ |
1545 | if (alternate->distance < current->distance) | |
1546 | return alternate; | |
1547 | if (current->distance < alternate->distance) | |
1548 | return current; | |
3e5c6e00 | 1549 | |
d62a17ae | 1550 | /* metric tie-breaks equal distance */ |
1551 | if (alternate->metric <= current->metric) | |
1552 | return alternate; | |
3e5c6e00 | 1553 | |
d62a17ae | 1554 | return current; |
3e5c6e00 | 1555 | } |
1556 | ||
d62a17ae | 1557 | /* Core function for processing routing information base. */ |
1558 | static void rib_process(struct route_node *rn) | |
1559 | { | |
1560 | struct route_entry *re; | |
1561 | struct route_entry *next; | |
1562 | struct route_entry *old_selected = NULL; | |
1563 | struct route_entry *new_selected = NULL; | |
1564 | struct route_entry *old_fib = NULL; | |
1565 | struct route_entry *new_fib = NULL; | |
1566 | struct route_entry *best = NULL; | |
1567 | char buf[SRCDEST2STR_BUFFER]; | |
1568 | rib_dest_t *dest; | |
1569 | struct zebra_vrf *zvrf = NULL; | |
86391e56 MS |
1570 | const struct prefix *p, *src_p; |
1571 | ||
d62a17ae | 1572 | srcdest_rnode_prefixes(rn, &p, &src_p); |
1573 | vrf_id_t vrf_id = VRF_UNKNOWN; | |
1574 | ||
1575 | assert(rn); | |
1576 | ||
1577 | dest = rib_dest_from_rnode(rn); | |
1578 | if (dest) { | |
1579 | zvrf = rib_dest_vrf(dest); | |
1580 | vrf_id = zvrf_id(zvrf); | |
1581 | } | |
bab85d4f | 1582 | |
d62a17ae | 1583 | if (IS_ZEBRA_DEBUG_RIB) |
1584 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bab85d4f | 1585 | |
d62a17ae | 1586 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1587 | zlog_debug("%u:%s: Processing rn %p", vrf_id, buf, rn); | |
bab85d4f | 1588 | |
607425e5 DS |
1589 | /* |
1590 | * we can have rn's that have a NULL info pointer | |
1591 | * (dest). As such let's not let the deref happen | |
1592 | * additionally we know RNODE_FOREACH_RE_SAFE | |
1593 | * will not iterate so we are ok. | |
1594 | */ | |
1595 | if (dest) | |
1596 | old_fib = dest->selected_fib; | |
5f7a4718 | 1597 | |
a2addae8 | 1598 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 1599 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
1600 | zlog_debug( | |
2da33d6b DS |
1601 | "%u:%s: Examine re %p (%s) status %x flags %x dist %d metric %d", |
1602 | vrf_id, buf, re, zebra_route_string(re->type), | |
1603 | re->status, re->flags, re->distance, | |
1604 | re->metric); | |
d62a17ae | 1605 | |
1606 | UNSET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
1607 | ||
1608 | /* Currently selected re. */ | |
1609 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { | |
1610 | assert(old_selected == NULL); | |
1611 | old_selected = re; | |
1612 | } | |
bab85d4f | 1613 | |
d62a17ae | 1614 | /* Skip deleted entries from selection */ |
1615 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
1616 | continue; | |
1617 | ||
1618 | /* Skip unreachable nexthop. */ | |
1619 | /* This first call to nexthop_active_update is merely to | |
1620 | * determine if | |
1621 | * there's any change to nexthops associated with this RIB | |
1622 | * entry. Now, | |
1623 | * rib_process() can be invoked due to an external event such as | |
1624 | * link | |
1625 | * down or due to next-hop-tracking evaluation. In the latter | |
1626 | * case, | |
1627 | * a decision has already been made that the NHs have changed. | |
1628 | * So, no | |
1629 | * need to invoke a potentially expensive call again. Further, | |
1630 | * since | |
1631 | * the change might be in a recursive NH which is not caught in | |
1632 | * the nexthop_active_update() code. Thus, we might miss changes | |
1633 | * to | |
1634 | * recursive NHs. | |
1635 | */ | |
1636 | if (!CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED) | |
0dddbf72 | 1637 | && !nexthop_active_update(rn, re, false)) { |
d62a17ae | 1638 | if (re->type == ZEBRA_ROUTE_TABLE) { |
1639 | /* XXX: HERE BE DRAGONS!!!!! | |
1640 | * In all honesty, I have not yet figured out | |
1641 | * what this part | |
1642 | * does or why the ROUTE_ENTRY_CHANGED test | |
1643 | * above is correct | |
1644 | * or why we need to delete a route here, and | |
1645 | * also not whether | |
1646 | * this concerns both selected and fib route, or | |
1647 | * only selected | |
1648 | * or only fib */ | |
1649 | /* This entry was denied by the 'ip protocol | |
1650 | * table' route-map, we | |
1651 | * need to delete it */ | |
1652 | if (re != old_selected) { | |
1653 | if (IS_ZEBRA_DEBUG_RIB) | |
1654 | zlog_debug( | |
32391aff | 1655 | "%s: %u:%s: imported via import-table but denied " |
d62a17ae | 1656 | "by the ip protocol table route-map", |
32391aff | 1657 | __func__, vrf_id, buf); |
d62a17ae | 1658 | rib_unlink(rn, re); |
1659 | } else | |
1660 | SET_FLAG(re->status, | |
1661 | ROUTE_ENTRY_REMOVED); | |
1662 | } | |
1663 | ||
1664 | continue; | |
1665 | } | |
bab85d4f | 1666 | |
d62a17ae | 1667 | /* Infinite distance. */ |
1668 | if (re->distance == DISTANCE_INFINITY) { | |
1669 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
1670 | continue; | |
1671 | } | |
bab85d4f | 1672 | |
d62a17ae | 1673 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_FIB_OVERRIDE)) { |
1674 | best = rib_choose_best(new_fib, re); | |
1675 | if (new_fib && best != new_fib) | |
1676 | UNSET_FLAG(new_fib->status, | |
1677 | ROUTE_ENTRY_CHANGED); | |
1678 | new_fib = best; | |
1679 | } else { | |
1680 | best = rib_choose_best(new_selected, re); | |
1681 | if (new_selected && best != new_selected) | |
1682 | UNSET_FLAG(new_selected->status, | |
1683 | ROUTE_ENTRY_CHANGED); | |
1684 | new_selected = best; | |
1685 | } | |
1686 | if (best != re) | |
1687 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
1688 | } /* RNODE_FOREACH_RE */ | |
1689 | ||
1690 | /* If no FIB override route, use the selected route also for FIB */ | |
1691 | if (new_fib == NULL) | |
1692 | new_fib = new_selected; | |
1693 | ||
1694 | /* After the cycle is finished, the following pointers will be set: | |
1695 | * old_selected --- RE entry currently having SELECTED | |
1696 | * new_selected --- RE entry that is newly SELECTED | |
1697 | * old_fib --- RE entry currently in kernel FIB | |
1698 | * new_fib --- RE entry that is newly to be in kernel FIB | |
1699 | * | |
1700 | * new_selected will get SELECTED flag, and is going to be redistributed | |
1701 | * the zclients. new_fib (which can be new_selected) will be installed | |
1702 | * in kernel. | |
1703 | */ | |
1704 | ||
1705 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { | |
1706 | zlog_debug( | |
1707 | "%u:%s: After processing: old_selected %p new_selected %p old_fib %p new_fib %p", | |
1708 | vrf_id, buf, (void *)old_selected, (void *)new_selected, | |
1709 | (void *)old_fib, (void *)new_fib); | |
1710 | } | |
446bb95e | 1711 | |
d62a17ae | 1712 | /* Buffer ROUTE_ENTRY_CHANGED here, because it will get cleared if |
1713 | * fib == selected */ | |
9d303b37 DL |
1714 | bool selected_changed = new_selected && CHECK_FLAG(new_selected->status, |
1715 | ROUTE_ENTRY_CHANGED); | |
d62a17ae | 1716 | |
1717 | /* Update fib according to selection results */ | |
1718 | if (new_fib && old_fib) | |
1719 | rib_process_update_fib(zvrf, rn, old_fib, new_fib); | |
1720 | else if (new_fib) | |
1721 | rib_process_add_fib(zvrf, rn, new_fib); | |
1722 | else if (old_fib) | |
1723 | rib_process_del_fib(zvrf, rn, old_fib); | |
1724 | ||
8cb41cd6 | 1725 | /* Update SELECTED entry */ |
d62a17ae | 1726 | if (old_selected != new_selected || selected_changed) { |
93bdadae | 1727 | |
d62a17ae | 1728 | if (new_selected && new_selected != new_fib) { |
0dddbf72 | 1729 | nexthop_active_update(rn, new_selected, true); |
d62a17ae | 1730 | UNSET_FLAG(new_selected->status, ROUTE_ENTRY_CHANGED); |
1731 | } | |
41ec9222 | 1732 | |
5af4b346 MS |
1733 | if (new_selected) { |
1734 | SET_FLAG(new_selected->flags, ZEBRA_FLAG_SELECTED); | |
1735 | ||
1736 | /* Special case: new route is system route, so | |
1737 | * dataplane update will not be done - ensure we | |
1738 | * redistribute the route. | |
1739 | */ | |
1740 | if (RIB_SYSTEM_ROUTE(new_selected)) | |
1741 | redistribute_update(p, src_p, new_selected, | |
1742 | old_selected); | |
1743 | } | |
1744 | ||
d62a17ae | 1745 | if (old_selected) { |
1746 | if (!new_selected) | |
1747 | redistribute_delete(p, src_p, old_selected); | |
1748 | if (old_selected != new_selected) | |
1749 | UNSET_FLAG(old_selected->flags, | |
1750 | ZEBRA_FLAG_SELECTED); | |
f857321e | 1751 | } |
d62a17ae | 1752 | } |
3e5c6e00 | 1753 | |
d62a17ae | 1754 | /* Remove all RE entries queued for removal */ |
a2addae8 | 1755 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 1756 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { |
1757 | if (IS_ZEBRA_DEBUG_RIB) { | |
1758 | rnode_debug(rn, vrf_id, "rn %p, removing re %p", | |
1759 | (void *)rn, (void *)re); | |
1760 | } | |
1761 | rib_unlink(rn, re); | |
1762 | } | |
1763 | } | |
4d38fdb4 | 1764 | |
d62a17ae | 1765 | /* |
1766 | * Check if the dest can be deleted now. | |
1767 | */ | |
1768 | rib_gc_dest(rn); | |
e96f9203 DO |
1769 | } |
1770 | ||
e5ac2adf MS |
1771 | /* |
1772 | * Utility to match route with dplane context data | |
1773 | */ | |
1774 | static bool rib_route_match_ctx(const struct route_entry *re, | |
25779064 MS |
1775 | const struct zebra_dplane_ctx *ctx, |
1776 | bool is_update) | |
e5ac2adf MS |
1777 | { |
1778 | bool result = false; | |
1779 | ||
1780 | if (is_update) { | |
1781 | /* | |
1782 | * In 'update' case, we test info about the 'previous' or | |
1783 | * 'old' route | |
1784 | */ | |
1785 | if ((re->type == dplane_ctx_get_old_type(ctx)) && | |
1786 | (re->instance == dplane_ctx_get_old_instance(ctx))) { | |
1787 | result = true; | |
1788 | ||
1789 | /* TODO -- we're using this extra test, but it's not | |
1790 | * exactly clear why. | |
1791 | */ | |
1792 | if (re->type == ZEBRA_ROUTE_STATIC && | |
1793 | (re->distance != dplane_ctx_get_old_distance(ctx) || | |
1794 | re->tag != dplane_ctx_get_old_tag(ctx))) { | |
1795 | result = false; | |
1796 | } | |
1797 | } | |
1798 | ||
1799 | } else { | |
1800 | /* | |
1801 | * Ordinary, single-route case using primary context info | |
1802 | */ | |
1803 | if ((dplane_ctx_get_op(ctx) != DPLANE_OP_ROUTE_DELETE) && | |
1804 | CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
1805 | /* Skip route that's been deleted */ | |
1806 | goto done; | |
1807 | } | |
1808 | ||
1809 | if ((re->type == dplane_ctx_get_type(ctx)) && | |
1810 | (re->instance == dplane_ctx_get_instance(ctx))) { | |
1811 | result = true; | |
1812 | ||
1813 | /* TODO -- we're using this extra test, but it's not | |
1814 | * exactly clear why. | |
1815 | */ | |
1816 | if (re->type == ZEBRA_ROUTE_STATIC && | |
1817 | (re->distance != dplane_ctx_get_distance(ctx) || | |
1818 | re->tag != dplane_ctx_get_tag(ctx))) { | |
1819 | result = false; | |
1820 | } | |
1821 | } | |
1822 | } | |
1823 | ||
1824 | done: | |
1825 | ||
1826 | return (result); | |
1827 | } | |
1828 | ||
1829 | /* | |
91f16812 | 1830 | * Route-update results processing after async dataplane update. |
e5ac2adf | 1831 | */ |
d37f4d6c | 1832 | static void rib_process_result(struct zebra_dplane_ctx *ctx) |
e5ac2adf MS |
1833 | { |
1834 | struct route_table *table = NULL; | |
97f5b441 | 1835 | struct zebra_vrf *zvrf = NULL; |
e5ac2adf MS |
1836 | struct route_node *rn = NULL; |
1837 | struct route_entry *re = NULL, *old_re = NULL, *rib; | |
1838 | bool is_update = false; | |
f183e380 | 1839 | struct nexthop *nexthop, *ctx_nexthop; |
97f5b441 | 1840 | char dest_str[PREFIX_STRLEN] = ""; |
5709131c | 1841 | enum dplane_op_e op; |
e5ac2adf MS |
1842 | enum zebra_dplane_result status; |
1843 | const struct prefix *dest_pfx, *src_pfx; | |
1844 | ||
1845 | /* Locate rn and re(s) from ctx */ | |
1846 | ||
1847 | table = zebra_vrf_table_with_table_id(dplane_ctx_get_afi(ctx), | |
1848 | dplane_ctx_get_safi(ctx), | |
1849 | dplane_ctx_get_vrf(ctx), | |
1850 | dplane_ctx_get_table(ctx)); | |
1851 | if (table == NULL) { | |
1852 | if (IS_ZEBRA_DEBUG_DPLANE) { | |
fe2c53d4 | 1853 | zlog_debug("Failed to process dplane results: no table for afi %d, safi %d, vrf %u", |
e5ac2adf MS |
1854 | dplane_ctx_get_afi(ctx), |
1855 | dplane_ctx_get_safi(ctx), | |
1856 | dplane_ctx_get_vrf(ctx)); | |
1857 | } | |
1858 | goto done; | |
1859 | } | |
1860 | ||
97f5b441 MS |
1861 | zvrf = vrf_info_lookup(dplane_ctx_get_vrf(ctx)); |
1862 | ||
e5ac2adf MS |
1863 | dest_pfx = dplane_ctx_get_dest(ctx); |
1864 | ||
1865 | /* Note well: only capturing the prefix string if debug is enabled here; | |
1866 | * unconditional log messages will have to generate the string. | |
1867 | */ | |
5709131c | 1868 | if (IS_ZEBRA_DEBUG_DPLANE) |
e5ac2adf | 1869 | prefix2str(dest_pfx, dest_str, sizeof(dest_str)); |
e5ac2adf MS |
1870 | |
1871 | src_pfx = dplane_ctx_get_src(ctx); | |
1872 | rn = srcdest_rnode_get(table, dplane_ctx_get_dest(ctx), | |
5709131c | 1873 | src_pfx ? (struct prefix_ipv6 *)src_pfx : NULL); |
e5ac2adf MS |
1874 | if (rn == NULL) { |
1875 | if (IS_ZEBRA_DEBUG_DPLANE) { | |
fe2c53d4 | 1876 | zlog_debug("Failed to process dplane results: no route for %u:%s", |
e5ac2adf MS |
1877 | dplane_ctx_get_vrf(ctx), dest_str); |
1878 | } | |
1879 | goto done; | |
1880 | } | |
1881 | ||
5c111895 MS |
1882 | route_unlock_node(rn); |
1883 | ||
e5ac2adf MS |
1884 | srcdest_rnode_prefixes(rn, &dest_pfx, &src_pfx); |
1885 | ||
1886 | op = dplane_ctx_get_op(ctx); | |
1887 | status = dplane_ctx_get_status(ctx); | |
1888 | ||
c831033f | 1889 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) |
f183e380 | 1890 | zlog_debug("%u:%s Processing dplane ctx %p, op %s result %s", |
e5ac2adf | 1891 | dplane_ctx_get_vrf(ctx), dest_str, ctx, |
f183e380 | 1892 | dplane_op2str(op), dplane_res2str(status)); |
e5ac2adf | 1893 | |
e5ac2adf MS |
1894 | /* |
1895 | * Update is a bit of a special case, where we may have both old and new | |
1896 | * routes to post-process. | |
1897 | */ | |
1898 | is_update = dplane_ctx_is_update(ctx); | |
1899 | ||
1900 | /* | |
1901 | * Take a pass through the routes, look for matches with the context | |
1902 | * info. | |
1903 | */ | |
1904 | RNODE_FOREACH_RE(rn, rib) { | |
1905 | ||
1906 | if (re == NULL) { | |
5709131c | 1907 | if (rib_route_match_ctx(rib, ctx, false)) |
e5ac2adf | 1908 | re = rib; |
e5ac2adf MS |
1909 | } |
1910 | ||
1911 | /* Check for old route match */ | |
1912 | if (is_update && (old_re == NULL)) { | |
5709131c | 1913 | if (rib_route_match_ctx(rib, ctx, true /*is_update*/)) |
e5ac2adf | 1914 | old_re = rib; |
e5ac2adf MS |
1915 | } |
1916 | ||
1917 | /* Have we found the routes we need to work on? */ | |
5709131c | 1918 | if (re && ((!is_update || old_re))) |
e5ac2adf | 1919 | break; |
e5ac2adf MS |
1920 | } |
1921 | ||
1922 | /* | |
1923 | * Check sequence number(s) to detect stale results before continuing | |
1924 | */ | |
60f98b23 DS |
1925 | if (re) { |
1926 | if (re->dplane_sequence != dplane_ctx_get_seq(ctx)) { | |
1927 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) | |
1928 | zlog_debug("%u:%s Stale dplane result for re %p", | |
1929 | dplane_ctx_get_vrf(ctx), | |
1930 | dest_str, re); | |
1931 | } else | |
1932 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); | |
e5ac2adf MS |
1933 | } |
1934 | ||
60f98b23 DS |
1935 | if (old_re) { |
1936 | if (old_re->dplane_sequence != dplane_ctx_get_old_seq(ctx)) { | |
1937 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) | |
1938 | zlog_debug("%u:%s Stale dplane result for old_re %p", | |
1939 | dplane_ctx_get_vrf(ctx), | |
1940 | dest_str, old_re); | |
1941 | } else | |
1942 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); | |
e5ac2adf MS |
1943 | } |
1944 | ||
12e7fe3a | 1945 | switch (op) { |
12e7fe3a DS |
1946 | case DPLANE_OP_ROUTE_INSTALL: |
1947 | case DPLANE_OP_ROUTE_UPDATE: | |
1948 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
677c1dd5 DS |
1949 | if (re) { |
1950 | UNSET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
1951 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
1952 | } | |
b9f0e5ee DS |
1953 | /* |
1954 | * On an update operation from the same route type | |
1955 | * context retrieval currently has no way to know | |
1956 | * which was the old and which was the new. | |
1957 | * So don't unset our flags that we just set. | |
1958 | * We know redistribution is ok because the | |
1959 | * old_re in this case is used for nothing | |
1960 | * more than knowing whom to contact if necessary. | |
1961 | */ | |
1962 | if (old_re && old_re != re) { | |
677c1dd5 DS |
1963 | UNSET_FLAG(old_re->status, ROUTE_ENTRY_FAILED); |
1964 | UNSET_FLAG(old_re->status, | |
1965 | ROUTE_ENTRY_INSTALLED); | |
1966 | } | |
12e7fe3a DS |
1967 | /* Update zebra nexthop FIB flag for each |
1968 | * nexthop that was installed. | |
1969 | */ | |
1970 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), | |
1971 | ctx_nexthop)) { | |
f183e380 | 1972 | |
677c1dd5 DS |
1973 | if (!re) |
1974 | continue; | |
1975 | ||
12e7fe3a DS |
1976 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
1977 | if (nexthop_same(ctx_nexthop, nexthop)) | |
1978 | break; | |
1979 | } | |
1980 | ||
1981 | if (nexthop == NULL) | |
1982 | continue; | |
1983 | ||
1984 | if (CHECK_FLAG(nexthop->flags, | |
1985 | NEXTHOP_FLAG_RECURSIVE)) | |
1986 | continue; | |
1987 | ||
1988 | if (CHECK_FLAG(ctx_nexthop->flags, | |
1989 | NEXTHOP_FLAG_FIB)) | |
1990 | SET_FLAG(nexthop->flags, | |
1991 | NEXTHOP_FLAG_FIB); | |
1992 | else | |
1993 | UNSET_FLAG(nexthop->flags, | |
1994 | NEXTHOP_FLAG_FIB); | |
f183e380 MS |
1995 | } |
1996 | ||
12e7fe3a DS |
1997 | if (zvrf) { |
1998 | zvrf->installs++; | |
1999 | /* Set flag for nexthop tracking processing */ | |
2000 | zvrf->flags |= ZEBRA_VRF_RIB_SCHEDULED; | |
2001 | } | |
f183e380 | 2002 | |
12e7fe3a DS |
2003 | /* Redistribute */ |
2004 | /* | |
2005 | * TODO -- still calling the redist api using the | |
2006 | * route_entries, and there's a corner-case here: | |
2007 | * if there's no client for the 'new' route, a redist | |
2008 | * deleting the 'old' route will be sent. But if the | |
2009 | * 'old' context info was stale, 'old_re' will be | |
2010 | * NULL here and that delete will not be sent. | |
2011 | */ | |
677c1dd5 DS |
2012 | if (re) |
2013 | redistribute_update(dest_pfx, src_pfx, | |
2014 | re, old_re); | |
e5ac2adf | 2015 | |
12e7fe3a | 2016 | /* Notify route owner */ |
677c1dd5 | 2017 | zsend_route_notify_owner_ctx(ctx, ZAPI_ROUTE_INSTALLED); |
e5ac2adf | 2018 | |
12e7fe3a | 2019 | } else { |
677c1dd5 DS |
2020 | if (re) |
2021 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
2022 | if (old_re) | |
2023 | SET_FLAG(old_re->status, ROUTE_ENTRY_FAILED); | |
2024 | if (re) | |
2025 | zsend_route_notify_owner(re, dest_pfx, | |
2026 | ZAPI_ROUTE_FAIL_INSTALL); | |
97f5b441 | 2027 | |
12e7fe3a DS |
2028 | zlog_warn("%u:%s: Route install failed", |
2029 | dplane_ctx_get_vrf(ctx), | |
2030 | prefix2str(dest_pfx, | |
2031 | dest_str, sizeof(dest_str))); | |
2032 | } | |
2033 | break; | |
2034 | case DPLANE_OP_ROUTE_DELETE: | |
677c1dd5 DS |
2035 | if (re) |
2036 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
12e7fe3a DS |
2037 | /* |
2038 | * In the delete case, the zebra core datastructs were | |
2039 | * updated (or removed) at the time the delete was issued, | |
2040 | * so we're just notifying the route owner. | |
e5ac2adf | 2041 | */ |
12e7fe3a | 2042 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { |
677c1dd5 DS |
2043 | if (re) { |
2044 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
2045 | UNSET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
2046 | } | |
12e7fe3a | 2047 | zsend_route_notify_owner_ctx(ctx, ZAPI_ROUTE_REMOVED); |
e5ac2adf | 2048 | |
12e7fe3a DS |
2049 | if (zvrf) |
2050 | zvrf->removals++; | |
2051 | } else { | |
677c1dd5 DS |
2052 | if (re) |
2053 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
12e7fe3a DS |
2054 | zsend_route_notify_owner_ctx(ctx, |
2055 | ZAPI_ROUTE_REMOVE_FAIL); | |
e5ac2adf | 2056 | |
12e7fe3a DS |
2057 | zlog_warn("%u:%s: Route Deletion failure", |
2058 | dplane_ctx_get_vrf(ctx), | |
2059 | prefix2str(dest_pfx, | |
2060 | dest_str, sizeof(dest_str))); | |
2061 | } | |
2062 | break; | |
d37f4d6c MS |
2063 | default: |
2064 | break; | |
e5ac2adf | 2065 | } |
e5ac2adf MS |
2066 | done: |
2067 | ||
2068 | /* Return context to dataplane module */ | |
2069 | dplane_ctx_fini(&ctx); | |
2070 | } | |
2071 | ||
5110a0c6 | 2072 | /* Take a list of route_node structs and return 1, if there was a record |
d62a17ae | 2073 | * picked from it and processed by rib_process(). Don't process more, |
5110a0c6 | 2074 | * than one RN record; operate only in the specified sub-queue. |
e96f9203 | 2075 | */ |
d7c0a89a | 2076 | static unsigned int process_subq(struct list *subq, uint8_t qindex) |
e96f9203 | 2077 | { |
d62a17ae | 2078 | struct listnode *lnode = listhead(subq); |
2079 | struct route_node *rnode; | |
2080 | rib_dest_t *dest; | |
2081 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 | 2082 | |
d62a17ae | 2083 | if (!lnode) |
2084 | return 0; | |
5110a0c6 | 2085 | |
d62a17ae | 2086 | rnode = listgetdata(lnode); |
2087 | dest = rib_dest_from_rnode(rnode); | |
2088 | if (dest) | |
2089 | zvrf = rib_dest_vrf(dest); | |
41ec9222 | 2090 | |
d62a17ae | 2091 | rib_process(rnode); |
5110a0c6 | 2092 | |
d62a17ae | 2093 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { |
2094 | char buf[SRCDEST2STR_BUFFER]; | |
2095 | srcdest_rnode2str(rnode, buf, sizeof(buf)); | |
2096 | zlog_debug("%u:%s: rn %p dequeued from sub-queue %u", | |
2097 | zvrf ? zvrf_id(zvrf) : 0, buf, rnode, qindex); | |
2098 | } | |
41ec9222 | 2099 | |
d62a17ae | 2100 | if (rnode->info) |
2101 | UNSET_FLAG(rib_dest_from_rnode(rnode)->flags, | |
2102 | RIB_ROUTE_QUEUED(qindex)); | |
9fd92e3c | 2103 | |
67b9467f | 2104 | #if 0 |
5110a0c6 SH |
2105 | else |
2106 | { | |
2107 | zlog_debug ("%s: called for route_node (%p, %d) with no ribs", | |
2108 | __func__, rnode, rnode->lock); | |
2109 | zlog_backtrace(LOG_DEBUG); | |
2110 | } | |
67b9467f | 2111 | #endif |
d62a17ae | 2112 | route_unlock_node(rnode); |
2113 | list_delete_node(subq, lnode); | |
2114 | return 1; | |
e96f9203 DO |
2115 | } |
2116 | ||
fb018d25 | 2117 | /* |
f183e380 | 2118 | * Perform next-hop tracking processing after RIB updates. |
fb018d25 | 2119 | */ |
f183e380 | 2120 | static void do_nht_processing(void) |
fb018d25 | 2121 | { |
d62a17ae | 2122 | struct vrf *vrf; |
2123 | struct zebra_vrf *zvrf; | |
9ec6b0bb | 2124 | |
d62a17ae | 2125 | /* Evaluate nexthops for those VRFs which underwent route processing. |
2126 | * This | |
2127 | * should limit the evaluation to the necessary VRFs in most common | |
2128 | * situations. | |
2129 | */ | |
a2addae8 | 2130 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
d62a17ae | 2131 | zvrf = vrf->info; |
2132 | if (zvrf == NULL || !(zvrf->flags & ZEBRA_VRF_RIB_SCHEDULED)) | |
2133 | continue; | |
2134 | ||
f183e380 MS |
2135 | if (IS_ZEBRA_DEBUG_RIB_DETAILED || IS_ZEBRA_DEBUG_NHT) |
2136 | zlog_debug("NHT processing check for zvrf %s", | |
2137 | zvrf_name(zvrf)); | |
2138 | ||
d62a17ae | 2139 | zvrf->flags &= ~ZEBRA_VRF_RIB_SCHEDULED; |
73bf60a0 RW |
2140 | zebra_evaluate_rnh(zvrf, AFI_IP, 0, RNH_NEXTHOP_TYPE, NULL); |
2141 | zebra_evaluate_rnh(zvrf, AFI_IP, 0, RNH_IMPORT_CHECK_TYPE, | |
d62a17ae | 2142 | NULL); |
73bf60a0 RW |
2143 | zebra_evaluate_rnh(zvrf, AFI_IP6, 0, RNH_NEXTHOP_TYPE, NULL); |
2144 | zebra_evaluate_rnh(zvrf, AFI_IP6, 0, RNH_IMPORT_CHECK_TYPE, | |
d62a17ae | 2145 | NULL); |
d62a17ae | 2146 | } |
939fba27 | 2147 | |
d62a17ae | 2148 | /* Schedule LSPs for processing, if needed. */ |
2149 | zvrf = vrf_info_lookup(VRF_DEFAULT); | |
2150 | if (mpls_should_lsps_be_processed(zvrf)) { | |
2151 | if (IS_ZEBRA_DEBUG_MPLS) | |
2152 | zlog_debug( | |
2153 | "%u: Scheduling all LSPs upon RIB completion", | |
2154 | zvrf_id(zvrf)); | |
2155 | zebra_mpls_lsp_schedule(zvrf); | |
2156 | mpls_unmark_lsps_for_processing(zvrf); | |
2157 | } | |
fb018d25 DS |
2158 | } |
2159 | ||
e96f9203 | 2160 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from |
d62a17ae | 2161 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and |
2162 | * data | |
e96f9203 DO |
2163 | * is pointed to the meta queue structure. |
2164 | */ | |
d62a17ae | 2165 | static wq_item_status meta_queue_process(struct work_queue *dummy, void *data) |
e96f9203 | 2166 | { |
d62a17ae | 2167 | struct meta_queue *mq = data; |
2168 | unsigned i; | |
91f16812 MS |
2169 | uint32_t queue_len, queue_limit; |
2170 | ||
2171 | /* Ensure there's room for more dataplane updates */ | |
2172 | queue_limit = dplane_get_in_queue_limit(); | |
2173 | queue_len = dplane_get_in_queue_len(); | |
2174 | if (queue_len > queue_limit) { | |
2175 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
8b962e77 MS |
2176 | zlog_debug("rib queue: dplane queue len %u, limit %u, retrying", |
2177 | queue_len, queue_limit); | |
91f16812 MS |
2178 | |
2179 | /* Ensure that the meta-queue is actually enqueued */ | |
489a9614 | 2180 | if (work_queue_empty(zrouter.ribq)) |
ea45a4e7 | 2181 | work_queue_add(zrouter.ribq, zrouter.mq); |
91f16812 MS |
2182 | |
2183 | return WQ_QUEUE_BLOCKED; | |
2184 | } | |
5110a0c6 | 2185 | |
d62a17ae | 2186 | for (i = 0; i < MQ_SIZE; i++) |
2187 | if (process_subq(mq->subq[i], i)) { | |
2188 | mq->size--; | |
2189 | break; | |
2190 | } | |
2191 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; | |
e96f9203 DO |
2192 | } |
2193 | ||
f52ed677 DS |
2194 | |
2195 | /* | |
2196 | * Look into the RN and queue it into the highest priority queue | |
2197 | * at this point in time for processing. | |
2198 | * | |
2199 | * We will enqueue a route node only once per invocation. | |
2200 | * | |
2201 | * There are two possibilities here that should be kept in mind. | |
2202 | * If the original invocation has not been pulled off for processing | |
2203 | * yet, A subsuquent invocation can have a route entry with a better | |
2204 | * meta queue index value and we can have a situation where | |
2205 | * we might have the same node enqueued 2 times. Not necessarily | |
2206 | * an optimal situation but it should be ok. | |
2207 | * | |
2208 | * The other possibility is that the original invocation has not | |
2209 | * been pulled off for processing yet, A subsusquent invocation | |
2210 | * doesn't have a route_entry with a better meta-queue and the | |
2211 | * original metaqueue index value will win and we'll end up with | |
2212 | * the route node enqueued once. | |
e96f9203 | 2213 | */ |
d62a17ae | 2214 | static void rib_meta_queue_add(struct meta_queue *mq, struct route_node *rn) |
e96f9203 | 2215 | { |
f52ed677 DS |
2216 | struct route_entry *re = NULL, *curr_re = NULL; |
2217 | uint8_t qindex = MQ_SIZE, curr_qindex = MQ_SIZE; | |
2218 | struct zebra_vrf *zvrf; | |
5110a0c6 | 2219 | |
f52ed677 DS |
2220 | RNODE_FOREACH_RE (rn, curr_re) { |
2221 | curr_qindex = route_info[curr_re->type].meta_q_map; | |
d62a17ae | 2222 | |
f52ed677 DS |
2223 | if (curr_qindex <= qindex) { |
2224 | re = curr_re; | |
2225 | qindex = curr_qindex; | |
d62a17ae | 2226 | } |
f52ed677 | 2227 | } |
5110a0c6 | 2228 | |
f52ed677 DS |
2229 | if (!re) |
2230 | return; | |
5110a0c6 | 2231 | |
f52ed677 DS |
2232 | /* Invariant: at this point we always have rn->info set. */ |
2233 | if (CHECK_FLAG(rib_dest_from_rnode(rn)->flags, | |
2234 | RIB_ROUTE_QUEUED(qindex))) { | |
d62a17ae | 2235 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2236 | rnode_debug(rn, re->vrf_id, | |
f52ed677 | 2237 | "rn %p is already queued in sub-queue %u", |
d62a17ae | 2238 | (void *)rn, qindex); |
f52ed677 | 2239 | return; |
d62a17ae | 2240 | } |
f52ed677 DS |
2241 | |
2242 | SET_FLAG(rib_dest_from_rnode(rn)->flags, RIB_ROUTE_QUEUED(qindex)); | |
2243 | listnode_add(mq->subq[qindex], rn); | |
2244 | route_lock_node(rn); | |
2245 | mq->size++; | |
2246 | ||
2247 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2248 | rnode_debug(rn, re->vrf_id, "queued rn %p into sub-queue %u", | |
2249 | (void *)rn, qindex); | |
2250 | ||
2251 | zvrf = zebra_vrf_lookup_by_id(re->vrf_id); | |
2252 | if (zvrf) | |
2253 | zvrf->flags |= ZEBRA_VRF_RIB_SCHEDULED; | |
4d38fdb4 | 2254 | } |
2255 | ||
6d691129 | 2256 | /* Add route_node to work queue and schedule processing */ |
d62a17ae | 2257 | void rib_queue_add(struct route_node *rn) |
4d38fdb4 | 2258 | { |
d62a17ae | 2259 | assert(rn); |
fc328ac9 | 2260 | |
d62a17ae | 2261 | /* Pointless to queue a route_node with no RIB entries to add or remove |
2262 | */ | |
2263 | if (!rnode_to_ribs(rn)) { | |
2264 | zlog_debug("%s: called for route_node (%p, %d) with no ribs", | |
2265 | __func__, (void *)rn, rn->lock); | |
2266 | zlog_backtrace(LOG_DEBUG); | |
2267 | return; | |
2268 | } | |
4d38fdb4 | 2269 | |
489a9614 | 2270 | if (zrouter.ribq == NULL) { |
e914ccbe | 2271 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2272 | "%s: work_queue does not exist!", __func__); |
d62a17ae | 2273 | return; |
2274 | } | |
2275 | ||
2276 | /* | |
2277 | * The RIB queue should normally be either empty or holding the only | |
2278 | * work_queue_item element. In the latter case this element would | |
2279 | * hold a pointer to the meta queue structure, which must be used to | |
2280 | * actually queue the route nodes to process. So create the MQ | |
2281 | * holder, if necessary, then push the work into it in any case. | |
2282 | * This semantics was introduced after 0.99.9 release. | |
2283 | */ | |
489a9614 | 2284 | if (work_queue_empty(zrouter.ribq)) |
ea45a4e7 | 2285 | work_queue_add(zrouter.ribq, zrouter.mq); |
e96f9203 | 2286 | |
ea45a4e7 | 2287 | rib_meta_queue_add(zrouter.mq, rn); |
fc328ac9 | 2288 | |
d62a17ae | 2289 | return; |
4d38fdb4 | 2290 | } |
2291 | ||
5110a0c6 SH |
2292 | /* Create new meta queue. |
2293 | A destructor function doesn't seem to be necessary here. | |
2294 | */ | |
d62a17ae | 2295 | static struct meta_queue *meta_queue_new(void) |
e96f9203 | 2296 | { |
d62a17ae | 2297 | struct meta_queue *new; |
2298 | unsigned i; | |
5110a0c6 | 2299 | |
d62a17ae | 2300 | new = XCALLOC(MTYPE_WORK_QUEUE, sizeof(struct meta_queue)); |
e96f9203 | 2301 | |
d62a17ae | 2302 | for (i = 0; i < MQ_SIZE; i++) { |
2303 | new->subq[i] = list_new(); | |
2304 | assert(new->subq[i]); | |
2305 | } | |
5110a0c6 | 2306 | |
d62a17ae | 2307 | return new; |
e96f9203 DO |
2308 | } |
2309 | ||
d62a17ae | 2310 | void meta_queue_free(struct meta_queue *mq) |
5a8dfcd8 | 2311 | { |
d62a17ae | 2312 | unsigned i; |
5a8dfcd8 | 2313 | |
d62a17ae | 2314 | for (i = 0; i < MQ_SIZE; i++) |
6a154c88 | 2315 | list_delete(&mq->subq[i]); |
5a8dfcd8 | 2316 | |
d62a17ae | 2317 | XFREE(MTYPE_WORK_QUEUE, mq); |
5a8dfcd8 RW |
2318 | } |
2319 | ||
4d38fdb4 | 2320 | /* initialise zebra rib work queue */ |
2561d12e | 2321 | static void rib_queue_init(void) |
4d38fdb4 | 2322 | { |
489a9614 DS |
2323 | if (!(zrouter.ribq = work_queue_new(zrouter.master, |
2324 | "route_node processing"))) { | |
e914ccbe | 2325 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2326 | "%s: could not initialise work queue!", __func__); |
d62a17ae | 2327 | return; |
2328 | } | |
4d38fdb4 | 2329 | |
d62a17ae | 2330 | /* fill in the work queue spec */ |
489a9614 DS |
2331 | zrouter.ribq->spec.workfunc = &meta_queue_process; |
2332 | zrouter.ribq->spec.errorfunc = NULL; | |
46a4e345 | 2333 | zrouter.ribq->spec.completion_func = NULL; |
d62a17ae | 2334 | /* XXX: TODO: These should be runtime configurable via vty */ |
489a9614 DS |
2335 | zrouter.ribq->spec.max_retries = 3; |
2336 | zrouter.ribq->spec.hold = ZEBRA_RIB_PROCESS_HOLD_TIME; | |
2337 | zrouter.ribq->spec.retry = ZEBRA_RIB_PROCESS_RETRY_TIME; | |
d62a17ae | 2338 | |
ea45a4e7 | 2339 | if (!(zrouter.mq = meta_queue_new())) { |
e914ccbe | 2340 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2341 | "%s: could not initialise meta queue!", __func__); |
d62a17ae | 2342 | return; |
2343 | } | |
2344 | return; | |
718e3744 | 2345 | } |
2346 | ||
6d691129 PJ |
2347 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2348 | * | |
2349 | * The queue length is bounded by the maximal size of the routing table, | |
2350 | * as a route_node will not be requeued, if already queued. | |
2351 | * | |
f0f77c9a DS |
2352 | * REs are submitted via rib_addnode or rib_delnode which set minimal |
2353 | * state, or static_install_route (when an existing RE is updated) | |
3c0755dc | 2354 | * and then submit route_node to queue for best-path selection later. |
f0f77c9a | 2355 | * Order of add/delete state changes are preserved for any given RE. |
6d691129 | 2356 | * |
f0f77c9a | 2357 | * Deleted REs are reaped during best-path selection. |
6d691129 PJ |
2358 | * |
2359 | * rib_addnode | |
f0f77c9a DS |
2360 | * |-> rib_link or unset ROUTE_ENTRY_REMOVE |->Update kernel with |
2361 | * |-------->| | best RE, if required | |
3c0755dc PJ |
2362 | * | | |
2363 | * static_install->|->rib_addqueue...... -> rib_process | |
2364 | * | | | |
2365 | * |-------->| |-> rib_unlink | |
f0f77c9a DS |
2366 | * |-> set ROUTE_ENTRY_REMOVE | |
2367 | * rib_delnode (RE freed) | |
6d691129 | 2368 | * |
9fd92e3c AS |
2369 | * The 'info' pointer of a route_node points to a rib_dest_t |
2370 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2371 | * dest is created on-demand by rib_link() and is kept around at least | |
2372 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
d62a17ae | 2373 | * |
6d691129 PJ |
2374 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): |
2375 | * | |
2376 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2377 | * - dest attached to route_node: |
2378 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2379 | * - route_node processing queue |
2380 | * - managed by: rib_addqueue, rib_process. | |
2381 | * | |
2382 | */ | |
d62a17ae | 2383 | |
f0f77c9a | 2384 | /* Add RE to head of the route node. */ |
d62a17ae | 2385 | static void rib_link(struct route_node *rn, struct route_entry *re, int process) |
2386 | { | |
2387 | struct route_entry *head; | |
2388 | rib_dest_t *dest; | |
2389 | afi_t afi; | |
2390 | const char *rmap_name; | |
9fd92e3c | 2391 | |
d62a17ae | 2392 | assert(re && rn); |
9fd92e3c | 2393 | |
d62a17ae | 2394 | dest = rib_dest_from_rnode(rn); |
2395 | if (!dest) { | |
2396 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2397 | rnode_debug(rn, re->vrf_id, "rn %p adding dest", rn); | |
7a4bb9c5 | 2398 | |
d62a17ae | 2399 | dest = XCALLOC(MTYPE_RIB_DEST, sizeof(rib_dest_t)); |
2400 | route_lock_node(rn); /* rn route table reference */ | |
2401 | rn->info = dest; | |
2402 | dest->rnode = rn; | |
2403 | } | |
2263a412 | 2404 | |
d62a17ae | 2405 | head = dest->routes; |
2406 | if (head) { | |
2407 | head->prev = re; | |
2408 | } | |
2409 | re->next = head; | |
2410 | dest->routes = re; | |
2411 | ||
2412 | afi = (rn->p.family == AF_INET) | |
2413 | ? AFI_IP | |
2414 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2415 | if (is_zebra_import_table_enabled(afi, re->table)) { | |
2416 | rmap_name = zebra_get_import_table_route_map(afi, re->table); | |
2417 | zebra_add_import_table_entry(rn, re, rmap_name); | |
2418 | } else if (process) | |
2419 | rib_queue_add(rn); | |
2420 | } | |
2421 | ||
7e24fdf3 DS |
2422 | static void rib_addnode(struct route_node *rn, |
2423 | struct route_entry *re, int process) | |
d62a17ae | 2424 | { |
2425 | /* RE node has been un-removed before route-node is processed. | |
2426 | * route_node must hence already be on the queue for processing.. | |
2427 | */ | |
2428 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
2429 | if (IS_ZEBRA_DEBUG_RIB) | |
2430 | rnode_debug(rn, re->vrf_id, "rn %p, un-removed re %p", | |
2431 | (void *)rn, (void *)re); | |
2432 | ||
2433 | UNSET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2434 | return; | |
2435 | } | |
2436 | rib_link(rn, re, process); | |
6d691129 PJ |
2437 | } |
2438 | ||
9fd92e3c AS |
2439 | /* |
2440 | * rib_unlink | |
2441 | * | |
2442 | * Detach a rib structure from a route_node. | |
2443 | * | |
2444 | * Note that a call to rib_unlink() should be followed by a call to | |
2445 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2446 | * longer required to be deleted. | |
2447 | */ | |
d62a17ae | 2448 | void rib_unlink(struct route_node *rn, struct route_entry *re) |
6d691129 | 2449 | { |
d62a17ae | 2450 | rib_dest_t *dest; |
9fd92e3c | 2451 | |
d62a17ae | 2452 | assert(rn && re); |
6d691129 | 2453 | |
d62a17ae | 2454 | if (IS_ZEBRA_DEBUG_RIB) |
2455 | rnode_debug(rn, re->vrf_id, "rn %p, re %p", (void *)rn, | |
2456 | (void *)re); | |
6d691129 | 2457 | |
d62a17ae | 2458 | dest = rib_dest_from_rnode(rn); |
6d691129 | 2459 | |
d62a17ae | 2460 | if (re->next) |
2461 | re->next->prev = re->prev; | |
6d691129 | 2462 | |
d62a17ae | 2463 | if (re->prev) |
2464 | re->prev->next = re->next; | |
2465 | else { | |
2466 | dest->routes = re->next; | |
2467 | } | |
7a4bb9c5 | 2468 | |
2eb07de3 DS |
2469 | if (dest->selected_fib == re) |
2470 | dest->selected_fib = NULL; | |
2471 | ||
7ee30f28 | 2472 | nexthops_free(re->ng.nexthop); |
d62a17ae | 2473 | XFREE(MTYPE_RE, re); |
2474 | } | |
2475 | ||
2476 | void rib_delnode(struct route_node *rn, struct route_entry *re) | |
2477 | { | |
2478 | afi_t afi; | |
2479 | ||
2480 | if (IS_ZEBRA_DEBUG_RIB) | |
2481 | rnode_debug(rn, re->vrf_id, "rn %p, re %p, removing", | |
2482 | (void *)rn, (void *)re); | |
2483 | SET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2484 | ||
2485 | afi = (rn->p.family == AF_INET) | |
2486 | ? AFI_IP | |
2487 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
2488 | if (is_zebra_import_table_enabled(afi, re->table)) { | |
2489 | zebra_del_import_table_entry(rn, re); | |
2490 | /* Just clean up if non main table */ | |
2491 | if (IS_ZEBRA_DEBUG_RIB) { | |
2492 | char buf[SRCDEST2STR_BUFFER]; | |
2493 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
2da33d6b DS |
2494 | zlog_debug("%u:%s: Freeing route rn %p, re %p (%s)", |
2495 | re->vrf_id, buf, rn, re, | |
2496 | zebra_route_string(re->type)); | |
d62a17ae | 2497 | } |
7a4bb9c5 | 2498 | |
d62a17ae | 2499 | rib_unlink(rn, re); |
2500 | } else { | |
2501 | rib_queue_add(rn); | |
2502 | } | |
718e3744 | 2503 | } |
2504 | ||
f0f77c9a | 2505 | /* This function dumps the contents of a given RE entry into |
dc95824a DO |
2506 | * standard debug log. Calling function name and IP prefix in |
2507 | * question are passed as 1st and 2nd arguments. | |
2508 | */ | |
2509 | ||
d62a17ae | 2510 | void _route_entry_dump(const char *func, union prefixconstptr pp, |
2511 | union prefixconstptr src_pp, | |
2512 | const struct route_entry *re) | |
2513 | { | |
d62a17ae | 2514 | const struct prefix *src_p = src_pp.p; |
2515 | bool is_srcdst = src_p && src_p->prefixlen; | |
2516 | char straddr[PREFIX_STRLEN]; | |
2517 | char srcaddr[PREFIX_STRLEN]; | |
2518 | struct nexthop *nexthop; | |
2519 | ||
2520 | zlog_debug("%s: dumping RE entry %p for %s%s%s vrf %u", func, | |
2521 | (const void *)re, prefix2str(pp, straddr, sizeof(straddr)), | |
2522 | is_srcdst ? " from " : "", | |
2523 | is_srcdst ? prefix2str(src_pp, srcaddr, sizeof(srcaddr)) | |
2524 | : "", | |
2525 | re->vrf_id); | |
cc54cfee RW |
2526 | zlog_debug("%s: uptime == %lu, type == %u, instance == %d, table == %d", |
2527 | func, (unsigned long)re->uptime, re->type, re->instance, | |
2528 | re->table); | |
d62a17ae | 2529 | zlog_debug( |
2530 | "%s: metric == %u, mtu == %u, distance == %u, flags == %u, status == %u", | |
2531 | func, re->metric, re->mtu, re->distance, re->flags, re->status); | |
2532 | zlog_debug("%s: nexthop_num == %u, nexthop_active_num == %u", func, | |
2533 | re->nexthop_num, re->nexthop_active_num); | |
2534 | ||
7ee30f28 | 2535 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
2d68a0f2 DS |
2536 | struct interface *ifp; |
2537 | struct vrf *vrf = vrf_lookup_by_id(nexthop->vrf_id); | |
2538 | ||
2539 | switch (nexthop->type) { | |
2540 | case NEXTHOP_TYPE_BLACKHOLE: | |
2541 | sprintf(straddr, "Blackhole"); | |
2542 | break; | |
2543 | case NEXTHOP_TYPE_IFINDEX: | |
2544 | ifp = if_lookup_by_index(nexthop->ifindex, | |
2545 | nexthop->vrf_id); | |
2546 | sprintf(straddr, "%s", ifp ? ifp->name : "Unknown"); | |
2547 | break; | |
2548 | case NEXTHOP_TYPE_IPV4: | |
2549 | /* fallthrough */ | |
2550 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
2551 | inet_ntop(AF_INET, &nexthop->gate, straddr, | |
2552 | INET6_ADDRSTRLEN); | |
2553 | break; | |
2554 | case NEXTHOP_TYPE_IPV6: | |
2555 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
2556 | inet_ntop(AF_INET6, &nexthop->gate, straddr, | |
2557 | INET6_ADDRSTRLEN); | |
2558 | break; | |
2559 | } | |
2560 | zlog_debug("%s: %s %s[%u] vrf %s(%u) with flags %s%s%s", func, | |
d62a17ae | 2561 | (nexthop->rparent ? " NH" : "NH"), straddr, |
2d68a0f2 DS |
2562 | nexthop->ifindex, vrf ? vrf->name : "Unknown", |
2563 | nexthop->vrf_id, | |
d62a17ae | 2564 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE) |
2565 | ? "ACTIVE " | |
2566 | : ""), | |
677c1dd5 | 2567 | (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED) |
d62a17ae | 2568 | ? "FIB " |
2569 | : ""), | |
2570 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE) | |
2571 | ? "RECURSIVE" | |
2572 | : "")); | |
2573 | } | |
2574 | zlog_debug("%s: dump complete", func); | |
dc95824a DO |
2575 | } |
2576 | ||
2577 | /* This is an exported helper to rtm_read() to dump the strange | |
f0f77c9a | 2578 | * RE entry found by rib_lookup_ipv4_route() |
dc95824a DO |
2579 | */ |
2580 | ||
d62a17ae | 2581 | void rib_lookup_and_dump(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
2582 | { | |
2583 | struct route_table *table; | |
2584 | struct route_node *rn; | |
2585 | struct route_entry *re; | |
2586 | char prefix_buf[INET_ADDRSTRLEN]; | |
2587 | ||
2588 | /* Lookup table. */ | |
2589 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
2590 | if (!table) { | |
e914ccbe | 2591 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
1c50c1c0 QY |
2592 | "%s:%u zebra_vrf_table() returned NULL", __func__, |
2593 | vrf_id); | |
d62a17ae | 2594 | return; |
2595 | } | |
2596 | ||
2597 | /* Scan the RIB table for exactly matching RE entry. */ | |
2598 | rn = route_node_lookup(table, (struct prefix *)p); | |
2599 | ||
2600 | /* No route for this prefix. */ | |
2601 | if (!rn) { | |
32391aff | 2602 | zlog_debug("%s:%u lookup failed for %s", __func__, vrf_id, |
d62a17ae | 2603 | prefix2str((struct prefix *)p, prefix_buf, |
2604 | sizeof(prefix_buf))); | |
2605 | return; | |
2606 | } | |
2607 | ||
2608 | /* Unlock node. */ | |
2609 | route_unlock_node(rn); | |
2610 | ||
2611 | /* let's go */ | |
a2addae8 | 2612 | RNODE_FOREACH_RE (rn, re) { |
32391aff DS |
2613 | zlog_debug("%s:%u rn %p, re %p: %s, %s", |
2614 | __func__, vrf_id, | |
2615 | (void *)rn, (void *)re, | |
d62a17ae | 2616 | (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED) |
2617 | ? "removed" | |
2618 | : "NOT removed"), | |
2619 | (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED) | |
2620 | ? "selected" | |
2621 | : "NOT selected")); | |
2622 | route_entry_dump(p, NULL, re); | |
2623 | } | |
dc95824a DO |
2624 | } |
2625 | ||
20e5ff0a DO |
2626 | /* Check if requested address assignment will fail due to another |
2627 | * route being installed by zebra in FIB already. Take necessary | |
2628 | * actions, if needed: remove such a route from FIB and deSELECT | |
f0f77c9a | 2629 | * corresponding RE entry. Then put affected RN into RIBQ head. |
20e5ff0a | 2630 | */ |
d62a17ae | 2631 | void rib_lookup_and_pushup(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
2632 | { | |
2633 | struct route_table *table; | |
2634 | struct route_node *rn; | |
d62a17ae | 2635 | unsigned changed = 0; |
5f7a4718 | 2636 | rib_dest_t *dest; |
d62a17ae | 2637 | |
2638 | if (NULL == (table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id))) { | |
e914ccbe | 2639 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
1c50c1c0 QY |
2640 | "%s:%u zebra_vrf_table() returned NULL", __func__, |
2641 | vrf_id); | |
d62a17ae | 2642 | return; |
2643 | } | |
2644 | ||
2645 | /* No matches would be the simplest case. */ | |
2646 | if (NULL == (rn = route_node_lookup(table, (struct prefix *)p))) | |
2647 | return; | |
2648 | ||
2649 | /* Unlock node. */ | |
2650 | route_unlock_node(rn); | |
2651 | ||
5f7a4718 | 2652 | dest = rib_dest_from_rnode(rn); |
d62a17ae | 2653 | /* Check all RE entries. In case any changes have to be done, requeue |
2654 | * the RN into RIBQ head. If the routing message about the new connected | |
2655 | * route (generated by the IP address we are going to assign very soon) | |
2656 | * comes before the RIBQ is processed, the new RE entry will join | |
2657 | * RIBQ record already on head. This is necessary for proper | |
2658 | * revalidation | |
2659 | * of the rest of the RE. | |
2660 | */ | |
5f7a4718 DS |
2661 | if (dest->selected_fib && !RIB_SYSTEM_ROUTE(dest->selected_fib)) { |
2662 | changed = 1; | |
2663 | if (IS_ZEBRA_DEBUG_RIB) { | |
2664 | char buf[PREFIX_STRLEN]; | |
2665 | ||
2666 | zlog_debug("%u:%s: freeing way for connected prefix", | |
2667 | dest->selected_fib->vrf_id, | |
2668 | prefix2str(&rn->p, buf, sizeof(buf))); | |
2669 | route_entry_dump(&rn->p, NULL, dest->selected_fib); | |
d62a17ae | 2670 | } |
5f7a4718 | 2671 | rib_uninstall(rn, dest->selected_fib); |
d62a17ae | 2672 | } |
2673 | if (changed) | |
2674 | rib_queue_add(rn); | |
20e5ff0a DO |
2675 | } |
2676 | ||
d62a17ae | 2677 | int rib_add_multipath(afi_t afi, safi_t safi, struct prefix *p, |
2678 | struct prefix_ipv6 *src_p, struct route_entry *re) | |
718e3744 | 2679 | { |
d62a17ae | 2680 | struct route_table *table; |
2681 | struct route_node *rn; | |
40ecd8e4 | 2682 | struct route_entry *same = NULL; |
d62a17ae | 2683 | struct nexthop *nexthop; |
2684 | int ret = 0; | |
b4c034b0 | 2685 | |
d62a17ae | 2686 | if (!re) |
2687 | return 0; | |
b4c034b0 | 2688 | |
1f610a1f | 2689 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
05737783 | 2690 | |
d62a17ae | 2691 | /* Lookup table. */ |
7865c65d RW |
2692 | table = zebra_vrf_table_with_table_id(afi, safi, re->vrf_id, re->table); |
2693 | if (!table) { | |
2694 | XFREE(MTYPE_RE, re); | |
d62a17ae | 2695 | return 0; |
7865c65d | 2696 | } |
cddf391b | 2697 | |
d62a17ae | 2698 | /* Make it sure prefixlen is applied to the prefix. */ |
2699 | apply_mask(p); | |
2700 | if (src_p) | |
2701 | apply_mask_ipv6(src_p); | |
718e3744 | 2702 | |
d62a17ae | 2703 | /* Set default distance by route type. */ |
2704 | if (re->distance == 0) { | |
0492eea0 | 2705 | re->distance = route_distance(re->type); |
718e3744 | 2706 | |
d62a17ae | 2707 | /* iBGP distance is 200. */ |
2708 | if (re->type == ZEBRA_ROUTE_BGP | |
2709 | && CHECK_FLAG(re->flags, ZEBRA_FLAG_IBGP)) | |
2710 | re->distance = 200; | |
2711 | } | |
718e3744 | 2712 | |
d62a17ae | 2713 | /* Lookup route node.*/ |
2714 | rn = srcdest_rnode_get(table, p, src_p); | |
718e3744 | 2715 | |
40ecd8e4 DS |
2716 | /* |
2717 | * If same type of route are installed, treat it as a implicit | |
2718 | * withdraw. | |
2719 | * If the user has specified the No route replace semantics | |
2720 | * for the install don't do a route replace. | |
2721 | */ | |
a2addae8 | 2722 | RNODE_FOREACH_RE (rn, same) { |
d62a17ae | 2723 | if (CHECK_FLAG(same->status, ROUTE_ENTRY_REMOVED)) |
2724 | continue; | |
41ec9222 | 2725 | |
eb327fa5 RW |
2726 | if (same->type != re->type) |
2727 | continue; | |
2728 | if (same->instance != re->instance) | |
2729 | continue; | |
996c9314 LB |
2730 | if (same->type == ZEBRA_ROUTE_KERNEL |
2731 | && same->metric != re->metric) | |
eb327fa5 | 2732 | continue; |
40ecd8e4 DS |
2733 | |
2734 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_RR_USE_DISTANCE) && | |
2735 | same->distance != re->distance) | |
2736 | continue; | |
2737 | ||
844b3a87 | 2738 | /* |
40ecd8e4 DS |
2739 | * We should allow duplicate connected routes |
2740 | * because of IPv6 link-local routes and unnumbered | |
2741 | * interfaces on Linux. | |
844b3a87 RW |
2742 | */ |
2743 | if (same->type != ZEBRA_ROUTE_CONNECT) | |
d62a17ae | 2744 | break; |
2745 | } | |
718e3744 | 2746 | |
d62a17ae | 2747 | /* If this route is kernel route, set FIB flag to the route. */ |
677c1dd5 DS |
2748 | if (RIB_SYSTEM_ROUTE(re)) { |
2749 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
7ee30f28 | 2750 | for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) |
d62a17ae | 2751 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
677c1dd5 | 2752 | } |
718e3744 | 2753 | |
d62a17ae | 2754 | /* Link new re to node.*/ |
2755 | if (IS_ZEBRA_DEBUG_RIB) { | |
2da33d6b DS |
2756 | rnode_debug(rn, re->vrf_id, |
2757 | "Inserting route rn %p, re %p (%s) existing %p", | |
2758 | rn, re, zebra_route_string(re->type), same); | |
718e3744 | 2759 | |
d62a17ae | 2760 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2761 | route_entry_dump(p, src_p, re); | |
718e3744 | 2762 | } |
d62a17ae | 2763 | rib_addnode(rn, re, 1); |
2764 | ret = 1; | |
6b0655a2 | 2765 | |
d62a17ae | 2766 | /* Free implicit route.*/ |
2767 | if (same) { | |
2768 | rib_delnode(rn, same); | |
2769 | ret = -1; | |
2770 | } | |
718e3744 | 2771 | |
d62a17ae | 2772 | route_unlock_node(rn); |
2773 | return ret; | |
2774 | } | |
2775 | ||
2776 | void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, | |
d7c0a89a | 2777 | unsigned short instance, int flags, struct prefix *p, |
fd36be7e | 2778 | struct prefix_ipv6 *src_p, const struct nexthop *nh, |
40ecd8e4 DS |
2779 | uint32_t table_id, uint32_t metric, uint8_t distance, |
2780 | bool fromkernel) | |
d62a17ae | 2781 | { |
2782 | struct route_table *table; | |
2783 | struct route_node *rn; | |
2784 | struct route_entry *re; | |
2785 | struct route_entry *fib = NULL; | |
2786 | struct route_entry *same = NULL; | |
fd36be7e | 2787 | struct nexthop *rtnh; |
d62a17ae | 2788 | char buf2[INET6_ADDRSTRLEN]; |
5f7a4718 | 2789 | rib_dest_t *dest; |
d62a17ae | 2790 | |
1f610a1f | 2791 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
d62a17ae | 2792 | |
2793 | /* Lookup table. */ | |
2794 | table = zebra_vrf_table_with_table_id(afi, safi, vrf_id, table_id); | |
2795 | if (!table) | |
2796 | return; | |
2797 | ||
2798 | /* Apply mask. */ | |
2799 | apply_mask(p); | |
2800 | if (src_p) | |
2801 | apply_mask_ipv6(src_p); | |
2802 | ||
2803 | /* Lookup route node. */ | |
2804 | rn = srcdest_rnode_lookup(table, p, src_p); | |
2805 | if (!rn) { | |
2806 | char dst_buf[PREFIX_STRLEN], src_buf[PREFIX_STRLEN]; | |
2807 | ||
2808 | prefix2str(p, dst_buf, sizeof(dst_buf)); | |
2809 | if (src_p && src_p->prefixlen) | |
2810 | prefix2str(src_p, src_buf, sizeof(src_buf)); | |
2811 | else | |
2812 | src_buf[0] = '\0'; | |
2813 | ||
2814 | if (IS_ZEBRA_DEBUG_RIB) | |
2815 | zlog_debug("%u:%s%s%s doesn't exist in rib", vrf_id, | |
2816 | dst_buf, | |
2817 | (src_buf[0] != '\0') ? " from " : "", | |
2818 | src_buf); | |
2819 | return; | |
2820 | } | |
718e3744 | 2821 | |
5f7a4718 DS |
2822 | dest = rib_dest_from_rnode(rn); |
2823 | fib = dest->selected_fib; | |
2824 | ||
d62a17ae | 2825 | /* Lookup same type route. */ |
a2addae8 | 2826 | RNODE_FOREACH_RE (rn, re) { |
d62a17ae | 2827 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
2828 | continue; | |
2829 | ||
d62a17ae | 2830 | if (re->type != type) |
2831 | continue; | |
2832 | if (re->instance != instance) | |
2833 | continue; | |
40ecd8e4 DS |
2834 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_RR_USE_DISTANCE) && |
2835 | distance != re->distance) | |
2836 | continue; | |
2837 | ||
996c9314 | 2838 | if (re->type == ZEBRA_ROUTE_KERNEL && re->metric != metric) |
f19435a8 | 2839 | continue; |
7ee30f28 | 2840 | if (re->type == ZEBRA_ROUTE_CONNECT && (rtnh = re->ng.nexthop) |
fd36be7e DL |
2841 | && rtnh->type == NEXTHOP_TYPE_IFINDEX && nh) { |
2842 | if (rtnh->ifindex != nh->ifindex) | |
d62a17ae | 2843 | continue; |
d62a17ae | 2844 | same = re; |
2845 | break; | |
2846 | } | |
2847 | /* Make sure that the route found has the same gateway. */ | |
2848 | else { | |
fd36be7e | 2849 | if (nh == NULL) { |
d62a17ae | 2850 | same = re; |
2851 | break; | |
2852 | } | |
7ee30f28 | 2853 | for (ALL_NEXTHOPS(re->ng, rtnh)) |
fd36be7e | 2854 | if (nexthop_same_no_recurse(rtnh, nh)) { |
d62a17ae | 2855 | same = re; |
2856 | break; | |
2857 | } | |
2858 | if (same) | |
2859 | break; | |
2860 | } | |
2861 | } | |
2862 | /* If same type of route can't be found and this message is from | |
2863 | kernel. */ | |
2864 | if (!same) { | |
5dfeba19 DS |
2865 | /* |
2866 | * In the past(HA!) we could get here because | |
2867 | * we were receiving a route delete from the | |
2868 | * kernel and we're not marking the proto | |
2869 | * as coming from it's appropriate originator. | |
2870 | * Now that we are properly noticing the fact | |
2871 | * that the kernel has deleted our route we | |
2872 | * are not going to get called in this path | |
2873 | * I am going to leave this here because | |
2874 | * this might still work this way on non-linux | |
2875 | * platforms as well as some weird state I have | |
2876 | * not properly thought of yet. | |
2877 | * If we can show that this code path is | |
2878 | * dead then we can remove it. | |
2879 | */ | |
b8faa875 | 2880 | if (fib && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) { |
d62a17ae | 2881 | if (IS_ZEBRA_DEBUG_RIB) { |
2da33d6b DS |
2882 | rnode_debug(rn, vrf_id, |
2883 | "rn %p, re %p (%s) was deleted from kernel, adding", | |
2884 | rn, fib, | |
2885 | zebra_route_string(fib->type)); | |
d62a17ae | 2886 | } |
2887 | if (allow_delete) { | |
677c1dd5 | 2888 | UNSET_FLAG(fib->status, ROUTE_ENTRY_INSTALLED); |
d62a17ae | 2889 | /* Unset flags. */ |
7ee30f28 | 2890 | for (rtnh = fib->ng.nexthop; rtnh; |
fd36be7e DL |
2891 | rtnh = rtnh->next) |
2892 | UNSET_FLAG(rtnh->flags, | |
d62a17ae | 2893 | NEXTHOP_FLAG_FIB); |
2894 | ||
ed216282 DS |
2895 | /* |
2896 | * This is a non FRR route | |
2897 | * as such we should mark | |
2898 | * it as deleted | |
2899 | */ | |
5f7a4718 | 2900 | dest->selected_fib = NULL; |
d62a17ae | 2901 | } else { |
2902 | /* This means someone else, other than Zebra, | |
2903 | * has deleted | |
2904 | * a Zebra router from the kernel. We will add | |
2905 | * it back */ | |
2906 | rib_install_kernel(rn, fib, NULL); | |
2907 | } | |
2908 | } else { | |
2909 | if (IS_ZEBRA_DEBUG_RIB) { | |
fd36be7e | 2910 | if (nh) |
d62a17ae | 2911 | rnode_debug( |
2912 | rn, vrf_id, | |
2913 | "via %s ifindex %d type %d " | |
2914 | "doesn't exist in rib", | |
36228974 | 2915 | inet_ntop(afi2family(afi), |
2916 | &nh->gate, buf2, | |
2917 | sizeof(buf2)), | |
2918 | nh->ifindex, type); | |
d62a17ae | 2919 | else |
2920 | rnode_debug( | |
2921 | rn, vrf_id, | |
fd36be7e DL |
2922 | "type %d doesn't exist in rib", |
2923 | type); | |
d62a17ae | 2924 | } |
2925 | route_unlock_node(rn); | |
2926 | return; | |
2927 | } | |
2928 | } | |
718e3744 | 2929 | |
5dfeba19 | 2930 | if (same) { |
996c9314 LB |
2931 | if (fromkernel && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE) |
2932 | && !allow_delete) { | |
5dfeba19 DS |
2933 | rib_install_kernel(rn, same, NULL); |
2934 | route_unlock_node(rn); | |
2935 | ||
2936 | return; | |
2937 | } | |
6134fd82 | 2938 | |
90264d64 | 2939 | if (CHECK_FLAG(flags, ZEBRA_FLAG_EVPN_ROUTE)) { |
6134fd82 | 2940 | struct nexthop *tmp_nh; |
2941 | ||
7ee30f28 | 2942 | for (ALL_NEXTHOPS(re->ng, tmp_nh)) { |
6134fd82 | 2943 | struct ipaddr vtep_ip; |
2944 | ||
2945 | memset(&vtep_ip, 0, sizeof(struct ipaddr)); | |
1ec31309 | 2946 | if (afi == AFI_IP) { |
2947 | vtep_ip.ipa_type = IPADDR_V4; | |
2948 | memcpy(&(vtep_ip.ipaddr_v4), | |
2949 | &(tmp_nh->gate.ipv4), | |
2950 | sizeof(struct in_addr)); | |
2951 | } else { | |
2952 | vtep_ip.ipa_type = IPADDR_V6; | |
2953 | memcpy(&(vtep_ip.ipaddr_v6), | |
2954 | &(tmp_nh->gate.ipv6), | |
2955 | sizeof(struct in6_addr)); | |
2956 | } | |
a317a9b9 | 2957 | zebra_vxlan_evpn_vrf_route_del(re->vrf_id, |
6134fd82 | 2958 | &vtep_ip, p); |
2959 | } | |
2960 | } | |
d62a17ae | 2961 | rib_delnode(rn, same); |
5dfeba19 | 2962 | } |
05737783 | 2963 | |
d62a17ae | 2964 | route_unlock_node(rn); |
2965 | return; | |
2966 | } | |
718e3744 | 2967 | |
718e3744 | 2968 | |
d7c0a89a QY |
2969 | int rib_add(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
2970 | unsigned short instance, int flags, struct prefix *p, | |
2971 | struct prefix_ipv6 *src_p, const struct nexthop *nh, | |
2972 | uint32_t table_id, uint32_t metric, uint32_t mtu, uint8_t distance, | |
2973 | route_tag_t tag) | |
d62a17ae | 2974 | { |
2975 | struct route_entry *re; | |
66af6845 | 2976 | struct nexthop *nexthop; |
718e3744 | 2977 | |
66af6845 | 2978 | /* Allocate new route_entry structure. */ |
d62a17ae | 2979 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); |
d62a17ae | 2980 | re->type = type; |
2981 | re->instance = instance; | |
2982 | re->distance = distance; | |
2983 | re->flags = flags; | |
2984 | re->metric = metric; | |
2985 | re->mtu = mtu; | |
2986 | re->table = table_id; | |
2987 | re->vrf_id = vrf_id; | |
2988 | re->nexthop_num = 0; | |
2989 | re->uptime = time(NULL); | |
4e40b6d6 | 2990 | re->tag = tag; |
d62a17ae | 2991 | |
66af6845 RW |
2992 | /* Add nexthop. */ |
2993 | nexthop = nexthop_new(); | |
2994 | *nexthop = *nh; | |
2995 | route_entry_nexthop_add(re, nexthop); | |
718e3744 | 2996 | |
66af6845 | 2997 | return rib_add_multipath(afi, safi, p, src_p, re); |
718e3744 | 2998 | } |
2999 | ||
1c848137 | 3000 | /* Schedule routes of a particular table (address-family) based on event. */ |
d5b8c216 | 3001 | void rib_update_table(struct route_table *table, rib_update_event_t event) |
d62a17ae | 3002 | { |
3003 | struct route_node *rn; | |
3004 | struct route_entry *re, *next; | |
3005 | ||
3006 | /* Walk all routes and queue for processing, if appropriate for | |
3007 | * the trigger event. | |
3008 | */ | |
3009 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { | |
1ca60f2c DS |
3010 | /* |
3011 | * If we are looking at a route node and the node | |
3012 | * has already been queued we don't | |
3013 | * need to queue it up again | |
3014 | */ | |
996c9314 LB |
3015 | if (rn->info && CHECK_FLAG(rib_dest_from_rnode(rn)->flags, |
3016 | RIB_ROUTE_ANY_QUEUED)) | |
1ca60f2c | 3017 | continue; |
d62a17ae | 3018 | switch (event) { |
3019 | case RIB_UPDATE_IF_CHANGE: | |
3020 | /* Examine all routes that won't get processed by the | |
3021 | * protocol or | |
3022 | * triggered by nexthop evaluation (NHT). This would be | |
3023 | * system, | |
3024 | * kernel and certain static routes. Note that NHT will | |
3025 | * get | |
3026 | * triggered upon an interface event as connected routes | |
3027 | * always | |
3028 | * get queued for processing. | |
3029 | */ | |
a2addae8 | 3030 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
0a16efff DS |
3031 | struct nexthop *nh; |
3032 | ||
996c9314 LB |
3033 | if (re->type != ZEBRA_ROUTE_SYSTEM |
3034 | && re->type != ZEBRA_ROUTE_KERNEL | |
3035 | && re->type != ZEBRA_ROUTE_CONNECT | |
3036 | && re->type != ZEBRA_ROUTE_STATIC) | |
0a16efff DS |
3037 | continue; |
3038 | ||
3039 | if (re->type != ZEBRA_ROUTE_STATIC) { | |
3040 | rib_queue_add(rn); | |
3041 | continue; | |
3042 | } | |
3043 | ||
7ee30f28 | 3044 | for (nh = re->ng.nexthop; nh; nh = nh->next) |
0a16efff DS |
3045 | if (!(nh->type == NEXTHOP_TYPE_IPV4 |
3046 | || nh->type == NEXTHOP_TYPE_IPV6)) | |
3047 | break; | |
3048 | ||
3049 | /* If we only have nexthops to a | |
3050 | * gateway, NHT will | |
3051 | * take care. | |
3052 | */ | |
3053 | if (nh) | |
d62a17ae | 3054 | rib_queue_add(rn); |
3055 | } | |
3056 | break; | |
3057 | ||
3058 | case RIB_UPDATE_RMAP_CHANGE: | |
3059 | case RIB_UPDATE_OTHER: | |
3060 | /* Right now, examine all routes. Can restrict to a | |
3061 | * protocol in | |
3062 | * some cases (TODO). | |
3063 | */ | |
3064 | if (rnode_to_ribs(rn)) | |
3065 | rib_queue_add(rn); | |
3066 | break; | |
3067 | ||
3068 | default: | |
3069 | break; | |
3070 | } | |
3071 | } | |
b84c7253 | 3072 | } |
3073 | ||
718e3744 | 3074 | /* RIB update function. */ |
d62a17ae | 3075 | void rib_update(vrf_id_t vrf_id, rib_update_event_t event) |
718e3744 | 3076 | { |
d62a17ae | 3077 | struct route_table *table; |
1c848137 | 3078 | |
d62a17ae | 3079 | /* Process routes of interested address-families. */ |
3080 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
d5b8c216 | 3081 | if (table) { |
3082 | if (IS_ZEBRA_DEBUG_EVENT) | |
3083 | zlog_debug("%s : AFI_IP event %d", __func__, event); | |
d62a17ae | 3084 | rib_update_table(table, event); |
d5b8c216 | 3085 | } |
718e3744 | 3086 | |
d62a17ae | 3087 | table = zebra_vrf_table(AFI_IP6, SAFI_UNICAST, vrf_id); |
d5b8c216 | 3088 | if (table) { |
3089 | if (IS_ZEBRA_DEBUG_EVENT) | |
3090 | zlog_debug("%s : AFI_IP6 event %d", __func__, event); | |
d62a17ae | 3091 | rib_update_table(table, event); |
d5b8c216 | 3092 | } |
718e3744 | 3093 | } |
3094 | ||
718e3744 | 3095 | /* Delete self installed routes after zebra is relaunched. */ |
95a29032 | 3096 | void rib_sweep_table(struct route_table *table) |
d62a17ae | 3097 | { |
3098 | struct route_node *rn; | |
3099 | struct route_entry *re; | |
3100 | struct route_entry *next; | |
915902cb | 3101 | struct nexthop *nexthop; |
d62a17ae | 3102 | |
915902cb DS |
3103 | if (!table) |
3104 | return; | |
d62a17ae | 3105 | |
915902cb | 3106 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
a2addae8 | 3107 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
915902cb DS |
3108 | if (IS_ZEBRA_DEBUG_RIB) |
3109 | route_entry_dump(&rn->p, NULL, re); | |
3110 | ||
3111 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
3112 | continue; | |
3113 | ||
3114 | if (!CHECK_FLAG(re->flags, ZEBRA_FLAG_SELFROUTE)) | |
3115 | continue; | |
3116 | ||
3117 | /* | |
3118 | * So we are starting up and have received | |
3119 | * routes from the kernel that we have installed | |
3120 | * from a previous run of zebra but not cleaned | |
3121 | * up ( say a kill -9 ) | |
3122 | * But since we haven't actually installed | |
3123 | * them yet( we received them from the kernel ) | |
3124 | * we don't think they are active. | |
3125 | * So let's pretend they are active to actually | |
3126 | * remove them. | |
3127 | * In all honesty I'm not sure if we should | |
3128 | * mark them as active when we receive them | |
3129 | * This is startup only so probably ok. | |
3130 | * | |
3131 | * If we ever decide to move rib_sweep_table | |
3132 | * to a different spot (ie startup ) | |
3133 | * this decision needs to be revisited | |
3134 | */ | |
677c1dd5 | 3135 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
7ee30f28 | 3136 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
915902cb DS |
3137 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
3138 | ||
0c555cc6 DS |
3139 | rib_uninstall_kernel(rn, re); |
3140 | rib_delnode(rn, re); | |
915902cb DS |
3141 | } |
3142 | } | |
718e3744 | 3143 | } |
3144 | ||
3145 | /* Sweep all RIB tables. */ | |
d62a17ae | 3146 | void rib_sweep_route(void) |
718e3744 | 3147 | { |
d62a17ae | 3148 | struct vrf *vrf; |
3149 | struct zebra_vrf *zvrf; | |
78104b9b | 3150 | |
a2addae8 | 3151 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
915902cb DS |
3152 | if ((zvrf = vrf->info) == NULL) |
3153 | continue; | |
3154 | ||
d62a17ae | 3155 | rib_sweep_table(zvrf->table[AFI_IP][SAFI_UNICAST]); |
3156 | rib_sweep_table(zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3157 | } | |
95a29032 | 3158 | |
89272910 | 3159 | zebra_router_sweep_route(); |
718e3744 | 3160 | } |
2ea1ab1c VT |
3161 | |
3162 | /* Remove specific by protocol routes from 'table'. */ | |
d7c0a89a | 3163 | unsigned long rib_score_proto_table(uint8_t proto, unsigned short instance, |
47a08aa9 | 3164 | struct route_table *table) |
d62a17ae | 3165 | { |
3166 | struct route_node *rn; | |
3167 | struct route_entry *re; | |
3168 | struct route_entry *next; | |
3169 | unsigned long n = 0; | |
3170 | ||
3171 | if (table) | |
3172 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) | |
a2addae8 | 3173 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 3174 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
3175 | continue; | |
3176 | if (re->type == proto | |
3177 | && re->instance == instance) { | |
3178 | rib_delnode(rn, re); | |
3179 | n++; | |
3180 | } | |
3181 | } | |
3182 | return n; | |
2ea1ab1c VT |
3183 | } |
3184 | ||
3185 | /* Remove specific by protocol routes. */ | |
d7c0a89a | 3186 | unsigned long rib_score_proto(uint8_t proto, unsigned short instance) |
2ea1ab1c | 3187 | { |
d62a17ae | 3188 | struct vrf *vrf; |
3189 | struct zebra_vrf *zvrf; | |
3190 | unsigned long cnt = 0; | |
78104b9b | 3191 | |
a2addae8 RW |
3192 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) |
3193 | if ((zvrf = vrf->info) != NULL) | |
3194 | cnt += rib_score_proto_table( | |
3195 | proto, instance, | |
3196 | zvrf->table[AFI_IP][SAFI_UNICAST]) | |
3197 | + rib_score_proto_table( | |
3198 | proto, instance, | |
3199 | zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
78104b9b | 3200 | |
89272910 | 3201 | cnt += zebra_router_score_proto(proto, instance); |
47a08aa9 | 3202 | |
d62a17ae | 3203 | return cnt; |
2ea1ab1c VT |
3204 | } |
3205 | ||
718e3744 | 3206 | /* Close RIB and clean up kernel routes. */ |
d62a17ae | 3207 | void rib_close_table(struct route_table *table) |
718e3744 | 3208 | { |
d62a17ae | 3209 | struct route_node *rn; |
1e9f448f | 3210 | rib_table_info_t *info; |
5f7a4718 | 3211 | rib_dest_t *dest; |
718e3744 | 3212 | |
1e9f448f DS |
3213 | if (!table) |
3214 | return; | |
9fd92e3c | 3215 | |
6ca30e9e | 3216 | info = route_table_get_info(table); |
5adc2528 | 3217 | |
5f7a4718 DS |
3218 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
3219 | dest = rib_dest_from_rnode(rn); | |
1e9f448f | 3220 | |
5f7a4718 | 3221 | if (dest && dest->selected_fib) { |
1e9f448f DS |
3222 | if (info->safi == SAFI_UNICAST) |
3223 | hook_call(rib_update, rn, NULL); | |
3224 | ||
258c07e4 | 3225 | if (!RIB_SYSTEM_ROUTE(dest->selected_fib)) { |
5f7a4718 | 3226 | rib_uninstall_kernel(rn, dest->selected_fib); |
258c07e4 MS |
3227 | dest->selected_fib = NULL; |
3228 | } | |
1e9f448f | 3229 | } |
5f7a4718 | 3230 | } |
718e3744 | 3231 | } |
3232 | ||
9bd9717b MS |
3233 | /* |
3234 | * Handler for async dataplane results after a pseudowire installation | |
3235 | */ | |
3236 | static int handle_pw_result(struct zebra_dplane_ctx *ctx) | |
3237 | { | |
3238 | int ret = 0; | |
3239 | struct zebra_pw *pw; | |
3240 | struct zebra_vrf *vrf; | |
3241 | ||
3242 | /* The pseudowire code assumes success - we act on an error | |
3243 | * result for installation attempts here. | |
3244 | */ | |
3245 | if (dplane_ctx_get_op(ctx) != DPLANE_OP_PW_INSTALL) | |
3246 | goto done; | |
3247 | ||
3248 | if (dplane_ctx_get_status(ctx) != ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
3249 | vrf = zebra_vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); | |
3250 | pw = zebra_pw_find(vrf, dplane_ctx_get_pw_ifname(ctx)); | |
3251 | if (pw) | |
3252 | zebra_pw_install_failure(pw); | |
3253 | } | |
3254 | ||
3255 | done: | |
3256 | ||
3257 | return ret; | |
3258 | } | |
3259 | ||
3260 | ||
7cdb1a84 | 3261 | /* |
d37f4d6c MS |
3262 | * Handle results from the dataplane system. Dequeue update context |
3263 | * structs, dispatch to appropriate internal handlers. | |
7cdb1a84 MS |
3264 | */ |
3265 | static int rib_process_dplane_results(struct thread *thread) | |
3266 | { | |
25779064 | 3267 | struct zebra_dplane_ctx *ctx; |
4c206c8f MS |
3268 | struct dplane_ctx_q ctxlist; |
3269 | ||
3270 | /* Dequeue a list of completed updates with one lock/unlock cycle */ | |
7cdb1a84 MS |
3271 | |
3272 | do { | |
4c206c8f MS |
3273 | TAILQ_INIT(&ctxlist); |
3274 | ||
7cdb1a84 MS |
3275 | /* Take lock controlling queue of results */ |
3276 | pthread_mutex_lock(&dplane_mutex); | |
3277 | { | |
d37f4d6c | 3278 | /* Dequeue list of context structs */ |
4c206c8f | 3279 | dplane_ctx_list_append(&ctxlist, &rib_dplane_q); |
7cdb1a84 MS |
3280 | } |
3281 | pthread_mutex_unlock(&dplane_mutex); | |
3282 | ||
4c206c8f MS |
3283 | /* Dequeue context block */ |
3284 | ctx = dplane_ctx_dequeue(&ctxlist); | |
3285 | ||
3286 | /* If we've emptied the results queue, we're done */ | |
3287 | if (ctx == NULL) | |
7cdb1a84 | 3288 | break; |
7cdb1a84 | 3289 | |
4c206c8f | 3290 | while (ctx) { |
d37f4d6c MS |
3291 | switch (dplane_ctx_get_op(ctx)) { |
3292 | case DPLANE_OP_ROUTE_INSTALL: | |
3293 | case DPLANE_OP_ROUTE_UPDATE: | |
3294 | case DPLANE_OP_ROUTE_DELETE: | |
3295 | rib_process_result(ctx); | |
3296 | break; | |
3297 | ||
3298 | case DPLANE_OP_LSP_INSTALL: | |
3299 | case DPLANE_OP_LSP_UPDATE: | |
3300 | case DPLANE_OP_LSP_DELETE: | |
3301 | zebra_mpls_lsp_dplane_result(ctx); | |
3302 | break; | |
3303 | ||
9bd9717b MS |
3304 | case DPLANE_OP_PW_INSTALL: |
3305 | case DPLANE_OP_PW_UNINSTALL: | |
3306 | handle_pw_result(ctx); | |
3307 | break; | |
3308 | ||
d37f4d6c MS |
3309 | default: |
3310 | /* Don't expect this: just return the struct? */ | |
3311 | dplane_ctx_fini(&ctx); | |
3312 | break; | |
3313 | } /* Dispatch by op code */ | |
4c206c8f MS |
3314 | |
3315 | ctx = dplane_ctx_dequeue(&ctxlist); | |
3316 | } | |
3317 | ||
5709131c | 3318 | } while (1); |
7cdb1a84 | 3319 | |
f183e380 MS |
3320 | /* Check for nexthop tracking processing after finishing with results */ |
3321 | do_nht_processing(); | |
3322 | ||
5709131c | 3323 | return 0; |
7cdb1a84 MS |
3324 | } |
3325 | ||
3326 | /* | |
3327 | * Results are returned from the dataplane subsystem, in the context of | |
1bcea841 | 3328 | * the dataplane pthread. We enqueue the results here for processing by |
7cdb1a84 MS |
3329 | * the main thread later. |
3330 | */ | |
4c206c8f | 3331 | static int rib_dplane_results(struct dplane_ctx_q *ctxlist) |
7cdb1a84 MS |
3332 | { |
3333 | /* Take lock controlling queue of results */ | |
3334 | pthread_mutex_lock(&dplane_mutex); | |
3335 | { | |
4c206c8f MS |
3336 | /* Enqueue context blocks */ |
3337 | dplane_ctx_list_append(&rib_dplane_q, ctxlist); | |
7cdb1a84 MS |
3338 | } |
3339 | pthread_mutex_unlock(&dplane_mutex); | |
3340 | ||
4c206c8f | 3341 | /* Ensure event is signalled to zebra main pthread */ |
3801e764 | 3342 | thread_add_event(zrouter.master, rib_process_dplane_results, NULL, 0, |
7cdb1a84 MS |
3343 | &t_dplane); |
3344 | ||
5709131c | 3345 | return 0; |
7cdb1a84 MS |
3346 | } |
3347 | ||
718e3744 | 3348 | /* Routing information base initialize. */ |
d62a17ae | 3349 | void rib_init(void) |
718e3744 | 3350 | { |
2561d12e | 3351 | rib_queue_init(); |
7cdb1a84 MS |
3352 | |
3353 | /* Init dataplane, and register for results */ | |
3354 | pthread_mutex_init(&dplane_mutex, NULL); | |
3355 | TAILQ_INIT(&rib_dplane_q); | |
4c206c8f | 3356 | zebra_dplane_init(rib_dplane_results); |
718e3744 | 3357 | } |
0915bb0c AS |
3358 | |
3359 | /* | |
3360 | * vrf_id_get_next | |
3361 | * | |
3362 | * Get the first vrf id that is greater than the given vrf id if any. | |
3363 | * | |
3364 | * Returns TRUE if a vrf id was found, FALSE otherwise. | |
3365 | */ | |
d62a17ae | 3366 | static inline int vrf_id_get_next(vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 3367 | { |
d62a17ae | 3368 | struct vrf *vrf; |
b72ede27 | 3369 | |
d62a17ae | 3370 | vrf = vrf_lookup_by_id(vrf_id); |
3371 | if (vrf) { | |
3372 | vrf = RB_NEXT(vrf_id_head, vrf); | |
3373 | if (vrf) { | |
3374 | *next_id_p = vrf->vrf_id; | |
3375 | return 1; | |
3376 | } | |
3377 | } | |
0915bb0c | 3378 | |
d62a17ae | 3379 | return 0; |
0915bb0c AS |
3380 | } |
3381 | ||
3382 | /* | |
3383 | * rib_tables_iter_next | |
3384 | * | |
3385 | * Returns the next table in the iteration. | |
3386 | */ | |
d62a17ae | 3387 | struct route_table *rib_tables_iter_next(rib_tables_iter_t *iter) |
3388 | { | |
3389 | struct route_table *table; | |
3390 | ||
3391 | /* | |
3392 | * Array that helps us go over all AFI/SAFI combinations via one | |
3393 | * index. | |
3394 | */ | |
3395 | static struct { | |
3396 | afi_t afi; | |
3397 | safi_t safi; | |
3398 | } afi_safis[] = { | |
3399 | {AFI_IP, SAFI_UNICAST}, {AFI_IP, SAFI_MULTICAST}, | |
3400 | {AFI_IP, SAFI_LABELED_UNICAST}, {AFI_IP6, SAFI_UNICAST}, | |
3401 | {AFI_IP6, SAFI_MULTICAST}, {AFI_IP6, SAFI_LABELED_UNICAST}, | |
3402 | }; | |
3403 | ||
3404 | table = NULL; | |
3405 | ||
3406 | switch (iter->state) { | |
3407 | ||
3408 | case RIB_TABLES_ITER_S_INIT: | |
3409 | iter->vrf_id = VRF_DEFAULT; | |
3410 | iter->afi_safi_ix = -1; | |
3411 | ||
3412 | /* Fall through */ | |
3413 | ||
3414 | case RIB_TABLES_ITER_S_ITERATING: | |
3415 | iter->afi_safi_ix++; | |
3416 | while (1) { | |
3417 | ||
3418 | while (iter->afi_safi_ix | |
3419 | < (int)ZEBRA_NUM_OF(afi_safis)) { | |
3420 | table = zebra_vrf_table( | |
3421 | afi_safis[iter->afi_safi_ix].afi, | |
3422 | afi_safis[iter->afi_safi_ix].safi, | |
3423 | iter->vrf_id); | |
3424 | if (table) | |
3425 | break; | |
3426 | ||
3427 | iter->afi_safi_ix++; | |
3428 | } | |
3429 | ||
3430 | /* | |
3431 | * Found another table in this vrf. | |
3432 | */ | |
3433 | if (table) | |
3434 | break; | |
3435 | ||
3436 | /* | |
3437 | * Done with all tables in the current vrf, go to the | |
3438 | * next | |
3439 | * one. | |
3440 | */ | |
3441 | if (!vrf_id_get_next(iter->vrf_id, &iter->vrf_id)) | |
3442 | break; | |
3443 | ||
3444 | iter->afi_safi_ix = 0; | |
3445 | } | |
0915bb0c | 3446 | |
0915bb0c AS |
3447 | break; |
3448 | ||
d62a17ae | 3449 | case RIB_TABLES_ITER_S_DONE: |
3450 | return NULL; | |
0915bb0c AS |
3451 | } |
3452 | ||
d62a17ae | 3453 | if (table) |
3454 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
3455 | else | |
3456 | iter->state = RIB_TABLES_ITER_S_DONE; | |
0915bb0c | 3457 | |
d62a17ae | 3458 | return table; |
0915bb0c | 3459 | } |