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718e3744 | 1 | /* Routing Information Base. |
2 | * Copyright (C) 1997, 98, 99, 2001 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
718e3744 | 23 | #include "command.h" |
43e52561 QY |
24 | #include "if.h" |
25 | #include "linklist.h" | |
718e3744 | 26 | #include "log.h" |
43e52561 QY |
27 | #include "memory.h" |
28 | #include "mpls.h" | |
29 | #include "nexthop.h" | |
30 | #include "prefix.h" | |
7514fb77 PJ |
31 | #include "prefix.h" |
32 | #include "routemap.h" | |
43e52561 | 33 | #include "sockunion.h" |
05737783 | 34 | #include "srcdest_table.h" |
43e52561 QY |
35 | #include "table.h" |
36 | #include "thread.h" | |
37 | #include "vrf.h" | |
38 | #include "workqueue.h" | |
50d89650 | 39 | #include "nexthop_group_private.h" |
00dffa8c | 40 | #include "frr_pthread.h" |
61e6de9d | 41 | #include "printfrr.h" |
718e3744 | 42 | |
89272910 | 43 | #include "zebra/zebra_router.h" |
43e52561 QY |
44 | #include "zebra/connected.h" |
45 | #include "zebra/debug.h" | |
46 | #include "zebra/interface.h" | |
47 | #include "zebra/redistribute.h" | |
718e3744 | 48 | #include "zebra/rib.h" |
49 | #include "zebra/rt.h" | |
43e52561 QY |
50 | #include "zebra/zapi_msg.h" |
51 | #include "zebra/zebra_errors.h" | |
7c551956 | 52 | #include "zebra/zebra_ns.h" |
fb018d25 | 53 | #include "zebra/zebra_rnh.h" |
43e52561 QY |
54 | #include "zebra/zebra_routemap.h" |
55 | #include "zebra/zebra_vrf.h" | |
6134fd82 | 56 | #include "zebra/zebra_vxlan.h" |
7cdb1a84 MS |
57 | #include "zebra/zapi_msg.h" |
58 | #include "zebra/zebra_dplane.h" | |
59 | ||
224ccf29 DL |
60 | DEFINE_MGROUP(ZEBRA, "zebra"); |
61 | ||
62 | DEFINE_MTYPE(ZEBRA, RE, "Route Entry"); | |
63 | DEFINE_MTYPE_STATIC(ZEBRA, RIB_DEST, "RIB destination"); | |
2a99ab95 | 64 | DEFINE_MTYPE_STATIC(ZEBRA, RIB_UPDATE_CTX, "Rib update context object"); |
04bec7b2 | 65 | DEFINE_MTYPE_STATIC(ZEBRA, WQ_NHG_WRAPPER, "WQ nhg wrapper"); |
2a99ab95 | 66 | |
7cdb1a84 MS |
67 | /* |
68 | * Event, list, and mutex for delivery of dataplane results | |
69 | */ | |
70 | static pthread_mutex_t dplane_mutex; | |
71 | static struct thread *t_dplane; | |
25779064 | 72 | static struct dplane_ctx_q rib_dplane_q; |
718e3744 | 73 | |
d62a17ae | 74 | DEFINE_HOOK(rib_update, (struct route_node * rn, const char *reason), |
8451921b | 75 | (rn, reason)); |
4f8ea50c | 76 | |
6baf7bb8 DS |
77 | /* Should we allow non Quagga processes to delete our routes */ |
78 | extern int allow_delete; | |
79 | ||
718e3744 | 80 | /* Each route type's string and default distance value. */ |
d62a17ae | 81 | static const struct { |
82 | int key; | |
8dc7a759 | 83 | uint8_t distance; |
73547a75 | 84 | uint8_t meta_q_map; |
d62a17ae | 85 | } route_info[ZEBRA_ROUTE_MAX] = { |
e22e8001 | 86 | [ZEBRA_ROUTE_NHG] = {ZEBRA_ROUTE_NHG, 255 /* Uneeded for nhg's */, 0}, |
c17b2d5b DS |
87 | [ZEBRA_ROUTE_SYSTEM] = {ZEBRA_ROUTE_SYSTEM, 0, 6}, |
88 | [ZEBRA_ROUTE_KERNEL] = {ZEBRA_ROUTE_KERNEL, 0, 2}, | |
e22e8001 | 89 | [ZEBRA_ROUTE_CONNECT] = {ZEBRA_ROUTE_CONNECT, 0, 1}, |
c17b2d5b DS |
90 | [ZEBRA_ROUTE_STATIC] = {ZEBRA_ROUTE_STATIC, 1, 3}, |
91 | [ZEBRA_ROUTE_RIP] = {ZEBRA_ROUTE_RIP, 120, 4}, | |
92 | [ZEBRA_ROUTE_RIPNG] = {ZEBRA_ROUTE_RIPNG, 120, 4}, | |
93 | [ZEBRA_ROUTE_OSPF] = {ZEBRA_ROUTE_OSPF, 110, 4}, | |
94 | [ZEBRA_ROUTE_OSPF6] = {ZEBRA_ROUTE_OSPF6, 110, 4}, | |
95 | [ZEBRA_ROUTE_ISIS] = {ZEBRA_ROUTE_ISIS, 115, 4}, | |
96 | [ZEBRA_ROUTE_BGP] = {ZEBRA_ROUTE_BGP, 20 /* IBGP is 200. */, 5}, | |
97 | [ZEBRA_ROUTE_PIM] = {ZEBRA_ROUTE_PIM, 255, 6}, | |
98 | [ZEBRA_ROUTE_EIGRP] = {ZEBRA_ROUTE_EIGRP, 90, 4}, | |
99 | [ZEBRA_ROUTE_NHRP] = {ZEBRA_ROUTE_NHRP, 10, 4}, | |
100 | [ZEBRA_ROUTE_HSLS] = {ZEBRA_ROUTE_HSLS, 255, 6}, | |
101 | [ZEBRA_ROUTE_OLSR] = {ZEBRA_ROUTE_OLSR, 255, 6}, | |
102 | [ZEBRA_ROUTE_TABLE] = {ZEBRA_ROUTE_TABLE, 150, 3}, | |
103 | [ZEBRA_ROUTE_LDP] = {ZEBRA_ROUTE_LDP, 150, 6}, | |
104 | [ZEBRA_ROUTE_VNC] = {ZEBRA_ROUTE_VNC, 20, 5}, | |
105 | [ZEBRA_ROUTE_VNC_DIRECT] = {ZEBRA_ROUTE_VNC_DIRECT, 20, 5}, | |
106 | [ZEBRA_ROUTE_VNC_DIRECT_RH] = {ZEBRA_ROUTE_VNC_DIRECT_RH, 20, 5}, | |
107 | [ZEBRA_ROUTE_BGP_DIRECT] = {ZEBRA_ROUTE_BGP_DIRECT, 20, 5}, | |
108 | [ZEBRA_ROUTE_BGP_DIRECT_EXT] = {ZEBRA_ROUTE_BGP_DIRECT_EXT, 20, 5}, | |
109 | [ZEBRA_ROUTE_BABEL] = {ZEBRA_ROUTE_BABEL, 100, 4}, | |
110 | [ZEBRA_ROUTE_SHARP] = {ZEBRA_ROUTE_SHARP, 150, 6}, | |
111 | [ZEBRA_ROUTE_PBR] = {ZEBRA_ROUTE_PBR, 200, 6}, | |
112 | [ZEBRA_ROUTE_BFD] = {ZEBRA_ROUTE_BFD, 255, 6}, | |
113 | [ZEBRA_ROUTE_OPENFABRIC] = {ZEBRA_ROUTE_OPENFABRIC, 115, 4}, | |
114 | [ZEBRA_ROUTE_VRRP] = {ZEBRA_ROUTE_VRRP, 255, 6}, | |
115 | [ZEBRA_ROUTE_SRTE] = {ZEBRA_ROUTE_SRTE, 255, 6}, | |
d6abd8b0 | 116 | /* Any new route type added to zebra, should be mirrored here */ |
c710b277 | 117 | |
d62a17ae | 118 | /* no entry/default: 150 */ |
718e3744 | 119 | }; |
6b0655a2 | 120 | |
04bec7b2 MS |
121 | /* Wrapper struct for nhg workqueue items; a 'ctx' is an incoming update |
122 | * from the OS, and an 'nhe' is a nhe update. | |
123 | */ | |
124 | struct wq_nhg_wrapper { | |
125 | int type; | |
126 | union { | |
127 | struct nhg_ctx *ctx; | |
128 | struct nhg_hash_entry *nhe; | |
129 | } u; | |
130 | }; | |
131 | ||
132 | #define WQ_NHG_WRAPPER_TYPE_CTX 0x01 | |
133 | #define WQ_NHG_WRAPPER_TYPE_NHG 0x02 | |
134 | ||
9d75e309 DL |
135 | /* %pRN is already a printer for route_nodes that just prints the prefix */ |
136 | #ifdef _FRR_ATTRIBUTE_PRINTFRR | |
137 | #pragma FRR printfrr_ext "%pZN" (struct route_node *) | |
138 | #endif | |
139 | ||
140 | printfrr_ext_autoreg_p("ZN", printfrr_zebra_node); | |
141 | static ssize_t printfrr_zebra_node(struct fbuf *buf, struct printfrr_eargs *ea, | |
142 | const void *ptr) | |
2263a412 | 143 | { |
9d75e309 DL |
144 | struct route_node *rn = (struct route_node *)ptr; |
145 | ssize_t rv = 0; | |
146 | ||
147 | /* just the table number? */ | |
148 | if (ea->fmt[0] == 't') { | |
149 | rib_dest_t *dest; | |
c2c02b76 DS |
150 | struct route_entry *re = NULL; |
151 | ||
9d75e309 | 152 | ea->fmt++; |
cb653491 | 153 | |
9d75e309 DL |
154 | if (!rn) |
155 | return bputch(buf, '!'); | |
c2c02b76 DS |
156 | |
157 | dest = rib_dest_from_rnode(rn); | |
158 | if (dest) | |
159 | re = re_list_first(&dest->routes); | |
160 | if (re) | |
9d75e309 DL |
161 | rv += bprintfrr(buf, "%u", re->table); |
162 | else | |
163 | rv += bputch(buf, '?'); | |
164 | ||
d62a17ae | 165 | } else { |
9d75e309 DL |
166 | char cbuf[PREFIX_STRLEN * 2 + 6]; |
167 | struct rib_table_info *info; | |
168 | ||
169 | if (!rn) | |
170 | return bputs(buf, "{(route_node *) NULL}"); | |
2263a412 | 171 | |
9d75e309 DL |
172 | srcdest_rnode2str(rn, cbuf, sizeof(cbuf)); |
173 | rv += bputs(buf, cbuf); | |
174 | ||
175 | info = srcdest_rnode_table_info(rn); | |
176 | if (info->safi == SAFI_MULTICAST) | |
177 | rv += bputs(buf, " (MRIB)"); | |
178 | } | |
179 | return rv; | |
2263a412 DL |
180 | } |
181 | ||
9d75e309 DL |
182 | #define rnode_debug(node, vrf_id, msg, ...) \ |
183 | zlog_debug("%s: (%u:%pZNt):%pZN: " msg, __func__, vrf_id, node, node, \ | |
184 | ##__VA_ARGS__) | |
185 | ||
186 | #define rnode_info(node, vrf_id, msg, ...) \ | |
187 | zlog_info("%s: (%u:%pZNt):%pZN: " msg, __func__, vrf_id, node, node, \ | |
188 | ##__VA_ARGS__) | |
189 | ||
61e6de9d DS |
190 | static char *_dump_re_status(const struct route_entry *re, char *buf, |
191 | size_t len) | |
192 | { | |
193 | if (re->status == 0) { | |
194 | snprintfrr(buf, len, "None "); | |
195 | return buf; | |
196 | } | |
197 | ||
198 | snprintfrr( | |
199 | buf, len, "%s%s%s%s%s%s%s", | |
200 | CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED) ? "Removed " : "", | |
201 | CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED) ? "Changed " : "", | |
202 | CHECK_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED) | |
203 | ? "Label Changed " | |
204 | : "", | |
205 | CHECK_FLAG(re->status, ROUTE_ENTRY_QUEUED) ? "Queued " : "", | |
206 | CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED) ? "Installed " | |
207 | : "", | |
208 | CHECK_FLAG(re->status, ROUTE_ENTRY_FAILED) ? "Failed " : "", | |
209 | CHECK_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG) ? "Fib NHG " | |
210 | : ""); | |
211 | return buf; | |
212 | } | |
213 | ||
fd289fc8 | 214 | uint8_t route_distance(int type) |
40c7bdb0 | 215 | { |
fd289fc8 | 216 | uint8_t distance; |
40c7bdb0 | 217 | |
d62a17ae | 218 | if ((unsigned)type >= array_size(route_info)) |
219 | distance = 150; | |
220 | else | |
221 | distance = route_info[type].distance; | |
40c7bdb0 | 222 | |
d62a17ae | 223 | return distance; |
40c7bdb0 | 224 | } |
225 | ||
d7c0a89a | 226 | int is_zebra_valid_kernel_table(uint32_t table_id) |
7a4bb9c5 | 227 | { |
8f500a1c | 228 | #ifdef linux |
d62a17ae | 229 | if ((table_id == RT_TABLE_UNSPEC) || (table_id == RT_TABLE_LOCAL) |
230 | || (table_id == RT_TABLE_COMPAT)) | |
231 | return 0; | |
8f500a1c RW |
232 | #endif |
233 | ||
d62a17ae | 234 | return 1; |
7a4bb9c5 DS |
235 | } |
236 | ||
d7c0a89a | 237 | int is_zebra_main_routing_table(uint32_t table_id) |
7a4bb9c5 | 238 | { |
c447ad08 | 239 | if (table_id == RT_TABLE_MAIN) |
d62a17ae | 240 | return 1; |
241 | return 0; | |
7a4bb9c5 DS |
242 | } |
243 | ||
86391e56 | 244 | int zebra_check_addr(const struct prefix *p) |
0aabccc0 | 245 | { |
d62a17ae | 246 | if (p->family == AF_INET) { |
d7c0a89a | 247 | uint32_t addr; |
0aabccc0 | 248 | |
d62a17ae | 249 | addr = p->u.prefix4.s_addr; |
250 | addr = ntohl(addr); | |
0aabccc0 | 251 | |
d62a17ae | 252 | if (IPV4_NET127(addr) || IN_CLASSD(addr) |
253 | || IPV4_LINKLOCAL(addr)) | |
254 | return 0; | |
255 | } | |
256 | if (p->family == AF_INET6) { | |
257 | if (IN6_IS_ADDR_LOOPBACK(&p->u.prefix6)) | |
258 | return 0; | |
259 | if (IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
260 | return 0; | |
261 | } | |
262 | return 1; | |
0aabccc0 DD |
263 | } |
264 | ||
6e26278c DS |
265 | /** |
266 | * copy_nexthop - copy a nexthop to the rib structure. | |
267 | */ | |
d62a17ae | 268 | void route_entry_copy_nexthops(struct route_entry *re, struct nexthop *nh) |
6e26278c | 269 | { |
c415d895 MS |
270 | assert(!re->nhe->nhg.nexthop); |
271 | copy_nexthops(&re->nhe->nhg.nexthop, nh, NULL); | |
718e3744 | 272 | } |
273 | ||
5463ce26 MS |
274 | static void route_entry_attach_ref(struct route_entry *re, |
275 | struct nhg_hash_entry *new) | |
718e3744 | 276 | { |
0eb97b86 | 277 | re->nhe = new; |
5463ce26 | 278 | re->nhe_id = new->id; |
718e3744 | 279 | |
5463ce26 | 280 | zebra_nhg_increment_ref(new); |
718e3744 | 281 | } |
282 | ||
cd7108ba EDP |
283 | int route_entry_update_nhe(struct route_entry *re, |
284 | struct nhg_hash_entry *new_nhghe) | |
718e3744 | 285 | { |
377e29f7 | 286 | struct nhg_hash_entry *old; |
5463ce26 | 287 | int ret = 0; |
718e3744 | 288 | |
cd7108ba | 289 | if (new_nhghe == NULL) { |
c415d895 MS |
290 | if (re->nhe) |
291 | zebra_nhg_decrement_ref(re->nhe); | |
292 | re->nhe = NULL; | |
5463ce26 MS |
293 | goto done; |
294 | } | |
718e3744 | 295 | |
1f655680 | 296 | if ((re->nhe_id != 0) && re->nhe && (re->nhe != new_nhghe)) { |
c415d895 | 297 | old = re->nhe; |
718e3744 | 298 | |
cd7108ba | 299 | route_entry_attach_ref(re, new_nhghe); |
718e3744 | 300 | |
5463ce26 MS |
301 | if (old) |
302 | zebra_nhg_decrement_ref(old); | |
84a89a8d | 303 | } else if (!re->nhe) |
5463ce26 | 304 | /* This is the first time it's being attached */ |
cd7108ba | 305 | route_entry_attach_ref(re, new_nhghe); |
595db7f1 | 306 | |
5463ce26 MS |
307 | done: |
308 | return ret; | |
595db7f1 | 309 | } |
310 | ||
2e8db20d EDP |
311 | void rib_handle_nhg_replace(struct nhg_hash_entry *old_entry, |
312 | struct nhg_hash_entry *new_entry) | |
1f655680 SW |
313 | { |
314 | struct zebra_router_table *zrt; | |
315 | struct route_node *rn; | |
316 | struct route_entry *re, *next; | |
317 | ||
318 | if (IS_ZEBRA_DEBUG_RIB_DETAILED || IS_ZEBRA_DEBUG_NHG_DETAIL) | |
319 | zlog_debug("%s: replacing routes nhe (%u) OLD %p NEW %p", | |
2e8db20d | 320 | __func__, new_entry->id, new_entry, old_entry); |
1f655680 SW |
321 | |
322 | /* We have to do them ALL */ | |
323 | RB_FOREACH (zrt, zebra_router_table_head, &zrouter.tables) { | |
324 | for (rn = route_top(zrt->table); rn; | |
325 | rn = srcdest_route_next(rn)) { | |
326 | RNODE_FOREACH_RE_SAFE (rn, re, next) { | |
2e8db20d EDP |
327 | if (re->nhe && re->nhe == old_entry) |
328 | route_entry_update_nhe(re, new_entry); | |
1f655680 SW |
329 | } |
330 | } | |
331 | } | |
332 | } | |
333 | ||
d62a17ae | 334 | struct route_entry *rib_match(afi_t afi, safi_t safi, vrf_id_t vrf_id, |
bc77c3bb MS |
335 | const union g_addr *addr, |
336 | struct route_node **rn_out) | |
d62a17ae | 337 | { |
338 | struct prefix p; | |
339 | struct route_table *table; | |
340 | struct route_node *rn; | |
5f7a4718 | 341 | struct route_entry *match = NULL; |
d62a17ae | 342 | |
343 | /* Lookup table. */ | |
344 | table = zebra_vrf_table(afi, safi, vrf_id); | |
345 | if (!table) | |
346 | return 0; | |
347 | ||
348 | memset(&p, 0, sizeof(struct prefix)); | |
349 | p.family = afi; | |
350 | if (afi == AFI_IP) { | |
351 | p.u.prefix4 = addr->ipv4; | |
352 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
353 | } else { | |
354 | p.u.prefix6 = addr->ipv6; | |
f4d81e55 | 355 | p.prefixlen = IPV6_MAX_BITLEN; |
d62a17ae | 356 | } |
718e3744 | 357 | |
c4efd0f4 | 358 | rn = route_node_match(table, &p); |
718e3744 | 359 | |
d62a17ae | 360 | while (rn) { |
5f7a4718 DS |
361 | rib_dest_t *dest; |
362 | ||
d62a17ae | 363 | route_unlock_node(rn); |
718e3744 | 364 | |
5f7a4718 | 365 | dest = rib_dest_from_rnode(rn); |
996c9314 LB |
366 | if (dest && dest->selected_fib |
367 | && !CHECK_FLAG(dest->selected_fib->status, | |
368 | ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 369 | match = dest->selected_fib; |
718e3744 | 370 | |
d62a17ae | 371 | /* If there is no selected route or matched route is EGP, go up |
372 | tree. */ | |
373 | if (!match) { | |
374 | do { | |
375 | rn = rn->parent; | |
376 | } while (rn && rn->info == NULL); | |
377 | if (rn) | |
378 | route_lock_node(rn); | |
379 | } else { | |
380 | if (match->type != ZEBRA_ROUTE_CONNECT) { | |
677c1dd5 DS |
381 | if (!CHECK_FLAG(match->status, |
382 | ROUTE_ENTRY_INSTALLED)) | |
d62a17ae | 383 | return NULL; |
384 | } | |
385 | ||
386 | if (rn_out) | |
387 | *rn_out = rn; | |
388 | return match; | |
389 | } | |
16814f96 | 390 | } |
d62a17ae | 391 | return NULL; |
392 | } | |
393 | ||
394 | struct route_entry *rib_match_ipv4_multicast(vrf_id_t vrf_id, | |
395 | struct in_addr addr, | |
396 | struct route_node **rn_out) | |
397 | { | |
398 | struct route_entry *re = NULL, *mre = NULL, *ure = NULL; | |
399 | struct route_node *m_rn = NULL, *u_rn = NULL; | |
400 | union g_addr gaddr = {.ipv4 = addr}; | |
401 | ||
526052fb | 402 | switch (zrouter.ipv4_multicast_mode) { |
d62a17ae | 403 | case MCAST_MRIB_ONLY: |
404 | return rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
405 | rn_out); | |
406 | case MCAST_URIB_ONLY: | |
407 | return rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, rn_out); | |
408 | case MCAST_NO_CONFIG: | |
409 | case MCAST_MIX_MRIB_FIRST: | |
410 | re = mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
411 | &m_rn); | |
412 | if (!mre) | |
413 | re = ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, | |
414 | &gaddr, &u_rn); | |
415 | break; | |
416 | case MCAST_MIX_DISTANCE: | |
417 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
418 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
419 | if (mre && ure) | |
420 | re = ure->distance < mre->distance ? ure : mre; | |
421 | else if (mre) | |
422 | re = mre; | |
423 | else if (ure) | |
424 | re = ure; | |
425 | break; | |
426 | case MCAST_MIX_PFXLEN: | |
427 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
428 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
429 | if (mre && ure) | |
430 | re = u_rn->p.prefixlen > m_rn->p.prefixlen ? ure : mre; | |
431 | else if (mre) | |
432 | re = mre; | |
433 | else if (ure) | |
434 | re = ure; | |
435 | break; | |
718e3744 | 436 | } |
33550aa8 | 437 | |
d62a17ae | 438 | if (rn_out) |
439 | *rn_out = (re == mre) ? m_rn : u_rn; | |
718e3744 | 440 | |
d62a17ae | 441 | if (IS_ZEBRA_DEBUG_RIB) { |
442 | char buf[BUFSIZ]; | |
443 | inet_ntop(AF_INET, &addr, buf, BUFSIZ); | |
4623d897 | 444 | |
bd47f3a3 JU |
445 | zlog_debug("%s: %s: vrf: %s(%u) found %s, using %s", __func__, |
446 | buf, vrf_id_to_name(vrf_id), vrf_id, | |
d62a17ae | 447 | mre ? (ure ? "MRIB+URIB" : "MRIB") |
448 | : ure ? "URIB" : "nothing", | |
449 | re == ure ? "URIB" : re == mre ? "MRIB" : "none"); | |
450 | } | |
451 | return re; | |
4623d897 DL |
452 | } |
453 | ||
d62a17ae | 454 | struct route_entry *rib_lookup_ipv4(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 455 | { |
d62a17ae | 456 | struct route_table *table; |
457 | struct route_node *rn; | |
5f7a4718 | 458 | struct route_entry *match = NULL; |
5f7a4718 | 459 | rib_dest_t *dest; |
718e3744 | 460 | |
d62a17ae | 461 | /* Lookup table. */ |
462 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
463 | if (!table) | |
464 | return 0; | |
718e3744 | 465 | |
d62a17ae | 466 | rn = route_node_lookup(table, (struct prefix *)p); |
718e3744 | 467 | |
d62a17ae | 468 | /* No route for this prefix. */ |
469 | if (!rn) | |
470 | return NULL; | |
718e3744 | 471 | |
d62a17ae | 472 | /* Unlock node. */ |
473 | route_unlock_node(rn); | |
5f7a4718 | 474 | dest = rib_dest_from_rnode(rn); |
718e3744 | 475 | |
996c9314 LB |
476 | if (dest && dest->selected_fib |
477 | && !CHECK_FLAG(dest->selected_fib->status, ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 478 | match = dest->selected_fib; |
718e3744 | 479 | |
d62a17ae | 480 | if (!match) |
481 | return NULL; | |
718e3744 | 482 | |
d62a17ae | 483 | if (match->type == ZEBRA_ROUTE_CONNECT) |
484 | return match; | |
f9e1b38e | 485 | |
677c1dd5 DS |
486 | if (CHECK_FLAG(match->status, ROUTE_ENTRY_INSTALLED)) |
487 | return match; | |
718e3744 | 488 | |
d62a17ae | 489 | return NULL; |
718e3744 | 490 | } |
491 | ||
a64448ba DS |
492 | /* |
493 | * Is this RIB labeled-unicast? It must be of type BGP and all paths | |
494 | * (nexthops) must have a label. | |
495 | */ | |
d62a17ae | 496 | int zebra_rib_labeled_unicast(struct route_entry *re) |
a64448ba | 497 | { |
d62a17ae | 498 | struct nexthop *nexthop = NULL; |
a64448ba | 499 | |
d62a17ae | 500 | if (re->type != ZEBRA_ROUTE_BGP) |
501 | return 0; | |
a64448ba | 502 | |
c415d895 | 503 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
d62a17ae | 504 | if (!nexthop->nh_label || !nexthop->nh_label->num_labels) |
505 | return 0; | |
6b0655a2 | 506 | |
d62a17ae | 507 | return 1; |
a64448ba | 508 | } |
718e3744 | 509 | |
6ae24471 DS |
510 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
511 | * is only used for IPv4. | |
512 | */ | |
0c555cc6 DS |
513 | void rib_install_kernel(struct route_node *rn, struct route_entry *re, |
514 | struct route_entry *old) | |
718e3744 | 515 | { |
d62a17ae | 516 | struct nexthop *nexthop; |
630d5962 | 517 | struct rib_table_info *info = srcdest_rnode_table_info(rn); |
d62a17ae | 518 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
97f5b441 MS |
519 | const struct prefix *p, *src_p; |
520 | enum zebra_dplane_result ret; | |
521 | ||
522 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
718e3744 | 523 | |
d62a17ae | 524 | srcdest_rnode_prefixes(rn, &p, &src_p); |
416ec78d | 525 | |
d62a17ae | 526 | if (info->safi != SAFI_UNICAST) { |
c415d895 | 527 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
d62a17ae | 528 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 529 | return; |
d62a17ae | 530 | } |
718e3744 | 531 | |
9ef49038 | 532 | |
8dfbc657 SW |
533 | /* |
534 | * Install the resolved nexthop object first. | |
535 | */ | |
c415d895 | 536 | zebra_nhg_install_kernel(re->nhe); |
8dfbc657 | 537 | |
2063a814 DS |
538 | /* |
539 | * If this is a replace to a new RE let the originator of the RE | |
540 | * know that they've lost | |
541 | */ | |
9a9f8926 | 542 | if (old && (old != re) && (old->type != re->type)) |
77b38a4a S |
543 | zsend_route_notify_owner(old, p, ZAPI_ROUTE_BETTER_ADMIN_WON, |
544 | info->afi, info->safi); | |
25b9cb0c | 545 | |
97f5b441 MS |
546 | /* Update fib selection */ |
547 | dest->selected_fib = re; | |
548 | ||
d62a17ae | 549 | /* |
550 | * Make sure we update the FPM any time we send new information to | |
551 | * the kernel. | |
552 | */ | |
553 | hook_call(rib_update, rn, "installing in kernel"); | |
97f5b441 MS |
554 | |
555 | /* Send add or update */ | |
8263d1d0 | 556 | if (old) |
97f5b441 | 557 | ret = dplane_route_update(rn, re, old); |
5709131c | 558 | else |
97f5b441 | 559 | ret = dplane_route_add(rn, re); |
97f5b441 MS |
560 | |
561 | switch (ret) { | |
ea1c14f6 | 562 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
60f98b23 | 563 | SET_FLAG(re->status, ROUTE_ENTRY_QUEUED); |
efe6c026 MS |
564 | |
565 | if (old) { | |
60f98b23 | 566 | SET_FLAG(old->status, ROUTE_ENTRY_QUEUED); |
efe6c026 MS |
567 | |
568 | /* Free old FIB nexthop group */ | |
7483dcbe | 569 | UNSET_FLAG(old->status, ROUTE_ENTRY_USE_FIB_NHG); |
efe6c026 MS |
570 | if (old->fib_ng.nexthop) { |
571 | nexthops_free(old->fib_ng.nexthop); | |
572 | old->fib_ng.nexthop = NULL; | |
573 | } | |
efe6c026 MS |
574 | } |
575 | ||
97f5b441 MS |
576 | if (zvrf) |
577 | zvrf->installs_queued++; | |
1e885672 | 578 | break; |
ea1c14f6 | 579 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
97f5b441 MS |
580 | { |
581 | char str[SRCDEST2STR_BUFFER]; | |
582 | ||
583 | srcdest_rnode2str(rn, str, sizeof(str)); | |
584 | flog_err(EC_ZEBRA_DP_INSTALL_FAIL, | |
b96f64f7 DS |
585 | "%u:%u:%s: Failed to enqueue dataplane install", |
586 | re->vrf_id, re->table, str); | |
1e885672 | 587 | break; |
97f5b441 | 588 | } |
ea1c14f6 | 589 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
97f5b441 MS |
590 | if (zvrf) |
591 | zvrf->installs++; | |
1e885672 DS |
592 | break; |
593 | } | |
d62a17ae | 594 | |
0c555cc6 | 595 | return; |
718e3744 | 596 | } |
597 | ||
598 | /* Uninstall the route from kernel. */ | |
0c555cc6 | 599 | void rib_uninstall_kernel(struct route_node *rn, struct route_entry *re) |
718e3744 | 600 | { |
d62a17ae | 601 | struct nexthop *nexthop; |
630d5962 | 602 | struct rib_table_info *info = srcdest_rnode_table_info(rn); |
d62a17ae | 603 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
05737783 | 604 | |
d62a17ae | 605 | if (info->safi != SAFI_UNICAST) { |
677c1dd5 | 606 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
c415d895 | 607 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
d6792f9d | 608 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 609 | return; |
d62a17ae | 610 | } |
416ec78d | 611 | |
d62a17ae | 612 | /* |
613 | * Make sure we update the FPM any time we send new information to | |
97f5b441 | 614 | * the dataplane. |
d62a17ae | 615 | */ |
616 | hook_call(rib_update, rn, "uninstalling from kernel"); | |
97f5b441 MS |
617 | |
618 | switch (dplane_route_delete(rn, re)) { | |
ea1c14f6 | 619 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
97f5b441 MS |
620 | if (zvrf) |
621 | zvrf->removals_queued++; | |
1e885672 | 622 | break; |
ea1c14f6 | 623 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
97f5b441 MS |
624 | { |
625 | char str[SRCDEST2STR_BUFFER]; | |
626 | ||
627 | srcdest_rnode2str(rn, str, sizeof(str)); | |
628 | flog_err(EC_ZEBRA_DP_INSTALL_FAIL, | |
629 | "%u:%s: Failed to enqueue dataplane uninstall", | |
630 | re->vrf_id, str); | |
1e885672 | 631 | break; |
97f5b441 | 632 | } |
ea1c14f6 | 633 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
1e885672 DS |
634 | if (zvrf) |
635 | zvrf->removals++; | |
636 | break; | |
637 | } | |
718e3744 | 638 | |
0c555cc6 | 639 | return; |
718e3744 | 640 | } |
641 | ||
642 | /* Uninstall the route from kernel. */ | |
d62a17ae | 643 | static void rib_uninstall(struct route_node *rn, struct route_entry *re) |
718e3744 | 644 | { |
630d5962 | 645 | struct rib_table_info *info = srcdest_rnode_table_info(rn); |
5f7a4718 | 646 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
97f5b441 | 647 | struct nexthop *nexthop; |
416ec78d | 648 | |
5f7a4718 | 649 | if (dest && dest->selected_fib == re) { |
d62a17ae | 650 | if (info->safi == SAFI_UNICAST) |
651 | hook_call(rib_update, rn, "rib_uninstall"); | |
5adc2528 | 652 | |
d62a17ae | 653 | /* If labeled-unicast route, uninstall transit LSP. */ |
654 | if (zebra_rib_labeled_unicast(re)) | |
655 | zebra_mpls_lsp_uninstall(info->zvrf, rn, re); | |
7cdb1a84 | 656 | |
3cdba47a | 657 | rib_uninstall_kernel(rn, re); |
97f5b441 MS |
658 | |
659 | dest->selected_fib = NULL; | |
660 | ||
efe6c026 MS |
661 | /* Free FIB nexthop group, if present */ |
662 | if (re->fib_ng.nexthop) { | |
663 | nexthops_free(re->fib_ng.nexthop); | |
664 | re->fib_ng.nexthop = NULL; | |
665 | } | |
7483dcbe | 666 | UNSET_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG); |
efe6c026 | 667 | |
c415d895 | 668 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
97f5b441 | 669 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
d62a17ae | 670 | } |
446bb95e | 671 | |
d62a17ae | 672 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { |
86391e56 MS |
673 | const struct prefix *p, *src_p; |
674 | ||
d62a17ae | 675 | srcdest_rnode_prefixes(rn, &p, &src_p); |
05737783 | 676 | |
40f321c0 | 677 | redistribute_delete(p, src_p, re, NULL); |
d62a17ae | 678 | UNSET_FLAG(re->flags, ZEBRA_FLAG_SELECTED); |
679 | } | |
718e3744 | 680 | } |
681 | ||
9fd92e3c AS |
682 | /* |
683 | * rib_can_delete_dest | |
684 | * | |
2951a7a4 | 685 | * Returns true if the given dest can be deleted from the table. |
9fd92e3c | 686 | */ |
d62a17ae | 687 | static int rib_can_delete_dest(rib_dest_t *dest) |
9fd92e3c | 688 | { |
045207e2 | 689 | if (re_list_first(&dest->routes)) { |
d62a17ae | 690 | return 0; |
691 | } | |
9fd92e3c | 692 | |
c86ba6c2 DS |
693 | /* |
694 | * Unresolved rnh's are stored on the default route's list | |
695 | * | |
696 | * dest->rnode can also be the source prefix node in an | |
697 | * ipv6 sourcedest table. Fortunately the prefix of a | |
698 | * source prefix node can never be the default prefix. | |
699 | */ | |
700 | if (is_default_prefix(&dest->rnode->p)) | |
701 | return 0; | |
702 | ||
d62a17ae | 703 | /* |
704 | * Don't delete the dest if we have to update the FPM about this | |
705 | * prefix. | |
706 | */ | |
707 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_FPM) | |
708 | || CHECK_FLAG(dest->flags, RIB_DEST_SENT_TO_FPM)) | |
709 | return 0; | |
5adc2528 | 710 | |
d62a17ae | 711 | return 1; |
9fd92e3c AS |
712 | } |
713 | ||
699dae23 DS |
714 | void zebra_rib_evaluate_rn_nexthops(struct route_node *rn, uint32_t seq) |
715 | { | |
716 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
699dae23 DS |
717 | struct rnh *rnh; |
718 | ||
719 | /* | |
50872b08 | 720 | * We are storing the rnh's associated withb |
699dae23 DS |
721 | * the tracked nexthop as a list of the rn's. |
722 | * Unresolved rnh's are placed at the top | |
723 | * of the tree list.( 0.0.0.0/0 for v4 and 0::0/0 for v6 ) | |
724 | * As such for each rn we need to walk up the tree | |
725 | * and see if any rnh's need to see if they | |
726 | * would match a more specific route | |
727 | */ | |
728 | while (rn) { | |
50872b08 DS |
729 | if (IS_ZEBRA_DEBUG_NHT_DETAILED) { |
730 | char buf[PREFIX_STRLEN]; | |
731 | ||
15569c58 DA |
732 | zlog_debug( |
733 | "%s: %s Being examined for Nexthop Tracking Count: %zd", | |
734 | __func__, | |
735 | srcdest_rnode2str(rn, buf, sizeof(buf)), | |
736 | dest ? rnh_list_count(&dest->nht) : 0); | |
50872b08 | 737 | } |
699dae23 DS |
738 | if (!dest) { |
739 | rn = rn->parent; | |
740 | if (rn) | |
741 | dest = rib_dest_from_rnode(rn); | |
742 | continue; | |
743 | } | |
744 | /* | |
745 | * If we have any rnh's stored in the nht list | |
746 | * then we know that this route node was used for | |
747 | * nht resolution and as such we need to call the | |
748 | * nexthop tracking evaluation code | |
749 | */ | |
739c9c90 | 750 | frr_each_safe(rnh_list, &dest->nht, rnh) { |
699dae23 DS |
751 | struct zebra_vrf *zvrf = |
752 | zebra_vrf_lookup_by_id(rnh->vrf_id); | |
753 | struct prefix *p = &rnh->node->p; | |
754 | ||
50872b08 | 755 | if (IS_ZEBRA_DEBUG_NHT_DETAILED) { |
699dae23 | 756 | char buf1[PREFIX_STRLEN]; |
699dae23 | 757 | |
bd47f3a3 | 758 | zlog_debug( |
2dbe669b | 759 | "%s(%u):%s has Nexthop(%pFX) Type: %s depending on it, evaluating %u:%u", |
bd47f3a3 JU |
760 | zvrf_name(zvrf), zvrf_id(zvrf), |
761 | srcdest_rnode2str(rn, buf1, | |
762 | sizeof(buf1)), | |
2dbe669b | 763 | p, rnh_type2str(rnh->type), seq, |
bd47f3a3 | 764 | rnh->seqno); |
699dae23 DS |
765 | } |
766 | ||
767 | /* | |
768 | * If we have evaluated this node on this pass | |
769 | * already, due to following the tree up | |
770 | * then we know that we can move onto the next | |
771 | * rnh to process. | |
772 | * | |
773 | * Additionally we call zebra_evaluate_rnh | |
774 | * when we gc the dest. In this case we know | |
775 | * that there must be no other re's where | |
776 | * we were originally as such we know that | |
777 | * that sequence number is ok to respect. | |
778 | */ | |
50872b08 DS |
779 | if (rnh->seqno == seq) { |
780 | if (IS_ZEBRA_DEBUG_NHT_DETAILED) | |
781 | zlog_debug( | |
1d5453d6 | 782 | " Node processed and moved already"); |
699dae23 | 783 | continue; |
50872b08 | 784 | } |
699dae23 DS |
785 | |
786 | rnh->seqno = seq; | |
787 | zebra_evaluate_rnh(zvrf, family2afi(p->family), 0, | |
788 | rnh->type, p); | |
789 | } | |
790 | ||
791 | rn = rn->parent; | |
792 | if (rn) | |
793 | dest = rib_dest_from_rnode(rn); | |
794 | } | |
795 | } | |
796 | ||
9fd92e3c AS |
797 | /* |
798 | * rib_gc_dest | |
799 | * | |
800 | * Garbage collect the rib dest corresponding to the given route node | |
801 | * if appropriate. | |
802 | * | |
2951a7a4 | 803 | * Returns true if the dest was deleted, false otherwise. |
9fd92e3c | 804 | */ |
d62a17ae | 805 | int rib_gc_dest(struct route_node *rn) |
9fd92e3c | 806 | { |
d62a17ae | 807 | rib_dest_t *dest; |
9fd92e3c | 808 | |
d62a17ae | 809 | dest = rib_dest_from_rnode(rn); |
810 | if (!dest) | |
811 | return 0; | |
9fd92e3c | 812 | |
d62a17ae | 813 | if (!rib_can_delete_dest(dest)) |
814 | return 0; | |
9fd92e3c | 815 | |
c9abf558 DS |
816 | if (IS_ZEBRA_DEBUG_RIB) { |
817 | struct zebra_vrf *zvrf; | |
818 | ||
819 | zvrf = rib_dest_vrf(dest); | |
d62a17ae | 820 | rnode_debug(rn, zvrf_id(zvrf), "removing dest from table"); |
c9abf558 | 821 | } |
9fd92e3c | 822 | |
699dae23 DS |
823 | zebra_rib_evaluate_rn_nexthops(rn, zebra_router_get_next_sequence()); |
824 | ||
d62a17ae | 825 | dest->rnode = NULL; |
aa57abfb | 826 | rnh_list_fini(&dest->nht); |
d62a17ae | 827 | XFREE(MTYPE_RIB_DEST, dest); |
828 | rn->info = NULL; | |
9fd92e3c | 829 | |
d62a17ae | 830 | /* |
831 | * Release the one reference that we keep on the route node. | |
832 | */ | |
833 | route_unlock_node(rn); | |
834 | return 1; | |
9fd92e3c AS |
835 | } |
836 | ||
224ccf29 DL |
837 | void zebra_rtable_node_cleanup(struct route_table *table, |
838 | struct route_node *node) | |
839 | { | |
840 | struct route_entry *re, *next; | |
841 | ||
842 | RNODE_FOREACH_RE_SAFE (node, re, next) { | |
843 | rib_unlink(node, re); | |
844 | } | |
845 | ||
846 | if (node->info) { | |
847 | rib_dest_t *dest = node->info; | |
848 | ||
849 | rnh_list_fini(&dest->nht); | |
850 | XFREE(MTYPE_RIB_DEST, node->info); | |
851 | } | |
852 | } | |
853 | ||
d62a17ae | 854 | static void rib_process_add_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
855 | struct route_entry *new) | |
3e5c6e00 | 856 | { |
d62a17ae | 857 | hook_call(rib_update, rn, "new route selected"); |
3e5c6e00 | 858 | |
d62a17ae | 859 | /* Update real nexthop. This may actually determine if nexthop is active |
860 | * or not. */ | |
c415d895 | 861 | if (!nexthop_group_active_nexthop_num(&(new->nhe->nhg))) { |
d62a17ae | 862 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
863 | return; | |
864 | } | |
3e5c6e00 | 865 | |
d62a17ae | 866 | if (IS_ZEBRA_DEBUG_RIB) { |
867 | char buf[SRCDEST2STR_BUFFER]; | |
868 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
c2c02b76 DS |
869 | zlog_debug("%s(%u:%u):%s: Adding route rn %p, re %p (%s)", |
870 | zvrf_name(zvrf), zvrf_id(zvrf), new->table, buf, rn, | |
871 | new, zebra_route_string(new->type)); | |
d62a17ae | 872 | } |
3e5c6e00 | 873 | |
d62a17ae | 874 | /* If labeled-unicast route, install transit LSP. */ |
875 | if (zebra_rib_labeled_unicast(new)) | |
876 | zebra_mpls_lsp_install(zvrf, rn, new); | |
a64448ba | 877 | |
3cdba47a | 878 | rib_install_kernel(rn, new, NULL); |
3e5c6e00 | 879 | |
d62a17ae | 880 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
3e5c6e00 | 881 | } |
882 | ||
d62a17ae | 883 | static void rib_process_del_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
884 | struct route_entry *old) | |
3e5c6e00 | 885 | { |
d62a17ae | 886 | hook_call(rib_update, rn, "removing existing route"); |
3e5c6e00 | 887 | |
d62a17ae | 888 | /* Uninstall from kernel. */ |
889 | if (IS_ZEBRA_DEBUG_RIB) { | |
890 | char buf[SRCDEST2STR_BUFFER]; | |
891 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
c2c02b76 DS |
892 | zlog_debug("%s(%u:%u):%s: Deleting route rn %p, re %p (%s)", |
893 | zvrf_name(zvrf), zvrf_id(zvrf), old->table, buf, rn, | |
894 | old, zebra_route_string(old->type)); | |
d62a17ae | 895 | } |
3e5c6e00 | 896 | |
d62a17ae | 897 | /* If labeled-unicast route, uninstall transit LSP. */ |
898 | if (zebra_rib_labeled_unicast(old)) | |
899 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
900 | ||
3cdba47a | 901 | rib_uninstall_kernel(rn, old); |
d62a17ae | 902 | |
903 | /* Update nexthop for route, reset changed flag. */ | |
ef57f35f DL |
904 | /* Note: this code also handles the Linux case when an interface goes |
905 | * down, causing the kernel to delete routes without sending DELROUTE | |
906 | * notifications | |
907 | */ | |
6883bf8d | 908 | if (RIB_KERNEL_ROUTE(old)) |
212df1de PG |
909 | SET_FLAG(old->status, ROUTE_ENTRY_REMOVED); |
910 | else | |
911 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); | |
d62a17ae | 912 | } |
913 | ||
914 | static void rib_process_update_fib(struct zebra_vrf *zvrf, | |
915 | struct route_node *rn, | |
916 | struct route_entry *old, | |
917 | struct route_entry *new) | |
918 | { | |
d62a17ae | 919 | int nh_active = 0; |
d62a17ae | 920 | |
921 | /* | |
922 | * We have to install or update if a new route has been selected or | |
923 | * something has changed. | |
924 | */ | |
925 | if (new != old || CHECK_FLAG(new->status, ROUTE_ENTRY_CHANGED)) { | |
926 | hook_call(rib_update, rn, "updating existing route"); | |
927 | ||
928 | /* Update the nexthop; we could determine here that nexthop is | |
929 | * inactive. */ | |
c415d895 | 930 | if (nexthop_group_active_nexthop_num(&(new->nhe->nhg))) |
d62a17ae | 931 | nh_active = 1; |
932 | ||
933 | /* If nexthop is active, install the selected route, if | |
934 | * appropriate. If | |
935 | * the install succeeds, cleanup flags for prior route, if | |
936 | * different from | |
937 | * newly selected. | |
938 | */ | |
939 | if (nh_active) { | |
940 | if (IS_ZEBRA_DEBUG_RIB) { | |
941 | char buf[SRCDEST2STR_BUFFER]; | |
04bec7b2 | 942 | |
d62a17ae | 943 | srcdest_rnode2str(rn, buf, sizeof(buf)); |
944 | if (new != old) | |
945 | zlog_debug( | |
c2c02b76 | 946 | "%s(%u:%u):%s: Updating route rn %p, re %p (%s) old %p (%s)", |
bd47f3a3 | 947 | zvrf_name(zvrf), zvrf_id(zvrf), |
c2c02b76 | 948 | new->table, buf, rn, new, |
2da33d6b DS |
949 | zebra_route_string(new->type), |
950 | old, | |
951 | zebra_route_string(old->type)); | |
d62a17ae | 952 | else |
953 | zlog_debug( | |
c2c02b76 | 954 | "%s(%u:%u):%s: Updating route rn %p, re %p (%s)", |
bd47f3a3 | 955 | zvrf_name(zvrf), zvrf_id(zvrf), |
c2c02b76 | 956 | new->table, buf, rn, new, |
2da33d6b | 957 | zebra_route_string(new->type)); |
d62a17ae | 958 | } |
959 | ||
960 | /* If labeled-unicast route, uninstall transit LSP. */ | |
961 | if (zebra_rib_labeled_unicast(old)) | |
962 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
963 | ||
3cdba47a DS |
964 | /* |
965 | * Non-system route should be installed. | |
966 | * If labeled-unicast route, install transit | |
967 | * LSP. | |
968 | */ | |
969 | if (zebra_rib_labeled_unicast(new)) | |
970 | zebra_mpls_lsp_install(zvrf, rn, new); | |
d62a17ae | 971 | |
3cdba47a | 972 | rib_install_kernel(rn, new, old); |
d62a17ae | 973 | } |
a64448ba | 974 | |
d62a17ae | 975 | /* |
976 | * If nexthop for selected route is not active or install | |
977 | * failed, we | |
978 | * may need to uninstall and delete for redistribution. | |
979 | */ | |
ed216282 | 980 | if (!nh_active) { |
d62a17ae | 981 | if (IS_ZEBRA_DEBUG_RIB) { |
982 | char buf[SRCDEST2STR_BUFFER]; | |
983 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
984 | if (new != old) | |
985 | zlog_debug( | |
c2c02b76 | 986 | "%s(%u:%u):%s: Deleting route rn %p, re %p (%s) old %p (%s) - nexthop inactive", |
bd47f3a3 | 987 | zvrf_name(zvrf), zvrf_id(zvrf), |
c2c02b76 | 988 | new->table, buf, rn, new, |
2da33d6b DS |
989 | zebra_route_string(new->type), |
990 | old, | |
991 | zebra_route_string(old->type)); | |
d62a17ae | 992 | else |
993 | zlog_debug( | |
c2c02b76 | 994 | "%s(%u:%u):%s: Deleting route rn %p, re %p (%s) - nexthop inactive", |
bd47f3a3 | 995 | zvrf_name(zvrf), zvrf_id(zvrf), |
c2c02b76 | 996 | new->table, buf, rn, new, |
2da33d6b | 997 | zebra_route_string(new->type)); |
d62a17ae | 998 | } |
999 | ||
5c18e662 DS |
1000 | /* |
1001 | * When we have gotten to this point | |
1002 | * the new route entry has no nexthops | |
1003 | * that are usable and as such we need | |
1004 | * to remove the old route, but only | |
1005 | * if we were the one who installed | |
1006 | * the old route | |
1007 | */ | |
1008 | if (!RIB_SYSTEM_ROUTE(old)) { | |
1009 | /* If labeled-unicast route, uninstall transit | |
1010 | * LSP. */ | |
1011 | if (zebra_rib_labeled_unicast(old)) | |
1012 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
d62a17ae | 1013 | |
5c18e662 DS |
1014 | rib_uninstall_kernel(rn, old); |
1015 | } | |
d62a17ae | 1016 | } |
1017 | } else { | |
1018 | /* | |
1019 | * Same route selected; check if in the FIB and if not, | |
3cdba47a DS |
1020 | * re-install. This is housekeeping code to deal with |
1021 | * race conditions in kernel with linux netlink reporting | |
1022 | * interface up before IPv4 or IPv6 protocol is ready | |
d62a17ae | 1023 | * to add routes. |
1024 | */ | |
3cdba47a DS |
1025 | if (!CHECK_FLAG(new->status, ROUTE_ENTRY_INSTALLED) || |
1026 | RIB_SYSTEM_ROUTE(new)) | |
677c1dd5 | 1027 | rib_install_kernel(rn, new, NULL); |
d62a17ae | 1028 | } |
1029 | ||
1030 | /* Update prior route. */ | |
6883bf8d | 1031 | if (new != old) |
d62a17ae | 1032 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); |
3e5c6e00 | 1033 | |
d62a17ae | 1034 | /* Clear changed flag. */ |
1035 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); | |
3e5c6e00 | 1036 | } |
1037 | ||
d62a17ae | 1038 | /* Check if 'alternate' RIB entry is better than 'current'. */ |
1039 | static struct route_entry *rib_choose_best(struct route_entry *current, | |
1040 | struct route_entry *alternate) | |
1041 | { | |
1042 | if (current == NULL) | |
1043 | return alternate; | |
1044 | ||
1045 | /* filter route selection in following order: | |
1046 | * - connected beats other types | |
fec4ca19 | 1047 | * - if both connected, loopback or vrf wins |
d62a17ae | 1048 | * - lower distance beats higher |
1049 | * - lower metric beats higher for equal distance | |
1050 | * - last, hence oldest, route wins tie break. | |
1051 | */ | |
1052 | ||
fec4ca19 DS |
1053 | /* Connected routes. Check to see if either are a vrf |
1054 | * or loopback interface. If not, pick the last connected | |
d62a17ae | 1055 | * route of the set of lowest metric connected routes. |
1056 | */ | |
1057 | if (alternate->type == ZEBRA_ROUTE_CONNECT) { | |
fec4ca19 DS |
1058 | if (current->type != ZEBRA_ROUTE_CONNECT) |
1059 | return alternate; | |
1060 | ||
1061 | /* both are connected. are either loop or vrf? */ | |
1062 | struct nexthop *nexthop = NULL; | |
1063 | ||
c415d895 | 1064 | for (ALL_NEXTHOPS(alternate->nhe->nhg, nexthop)) { |
873fde8c | 1065 | struct interface *ifp = if_lookup_by_index( |
1066 | nexthop->ifindex, alternate->vrf_id); | |
1067 | ||
1068 | if (ifp && if_is_loopback_or_vrf(ifp)) | |
fec4ca19 DS |
1069 | return alternate; |
1070 | } | |
1071 | ||
c415d895 | 1072 | for (ALL_NEXTHOPS(current->nhe->nhg, nexthop)) { |
873fde8c | 1073 | struct interface *ifp = if_lookup_by_index( |
1074 | nexthop->ifindex, current->vrf_id); | |
1075 | ||
1076 | if (ifp && if_is_loopback_or_vrf(ifp)) | |
fec4ca19 DS |
1077 | return current; |
1078 | } | |
1079 | ||
1080 | /* Neither are loop or vrf so pick best metric */ | |
1081 | if (alternate->metric <= current->metric) | |
d62a17ae | 1082 | return alternate; |
1083 | ||
1084 | return current; | |
1085 | } | |
3e5c6e00 | 1086 | |
d62a17ae | 1087 | if (current->type == ZEBRA_ROUTE_CONNECT) |
1088 | return current; | |
3e5c6e00 | 1089 | |
d62a17ae | 1090 | /* higher distance loses */ |
1091 | if (alternate->distance < current->distance) | |
1092 | return alternate; | |
1093 | if (current->distance < alternate->distance) | |
1094 | return current; | |
3e5c6e00 | 1095 | |
d62a17ae | 1096 | /* metric tie-breaks equal distance */ |
1097 | if (alternate->metric <= current->metric) | |
1098 | return alternate; | |
3e5c6e00 | 1099 | |
d62a17ae | 1100 | return current; |
3e5c6e00 | 1101 | } |
1102 | ||
d62a17ae | 1103 | /* Core function for processing routing information base. */ |
1104 | static void rib_process(struct route_node *rn) | |
1105 | { | |
1106 | struct route_entry *re; | |
1107 | struct route_entry *next; | |
1108 | struct route_entry *old_selected = NULL; | |
1109 | struct route_entry *new_selected = NULL; | |
1110 | struct route_entry *old_fib = NULL; | |
1111 | struct route_entry *new_fib = NULL; | |
1112 | struct route_entry *best = NULL; | |
1113 | char buf[SRCDEST2STR_BUFFER]; | |
1114 | rib_dest_t *dest; | |
1115 | struct zebra_vrf *zvrf = NULL; | |
bd47f3a3 | 1116 | struct vrf *vrf; |
86391e56 MS |
1117 | const struct prefix *p, *src_p; |
1118 | ||
d62a17ae | 1119 | srcdest_rnode_prefixes(rn, &p, &src_p); |
1120 | vrf_id_t vrf_id = VRF_UNKNOWN; | |
1121 | ||
1122 | assert(rn); | |
1123 | ||
1124 | dest = rib_dest_from_rnode(rn); | |
1125 | if (dest) { | |
1126 | zvrf = rib_dest_vrf(dest); | |
1127 | vrf_id = zvrf_id(zvrf); | |
1128 | } | |
bab85d4f | 1129 | |
bd47f3a3 JU |
1130 | vrf = vrf_lookup_by_id(vrf_id); |
1131 | ||
d62a17ae | 1132 | if (IS_ZEBRA_DEBUG_RIB) |
1133 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bab85d4f | 1134 | |
607425e5 DS |
1135 | /* |
1136 | * we can have rn's that have a NULL info pointer | |
1137 | * (dest). As such let's not let the deref happen | |
1138 | * additionally we know RNODE_FOREACH_RE_SAFE | |
1139 | * will not iterate so we are ok. | |
1140 | */ | |
f5158712 MS |
1141 | if (dest) { |
1142 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { | |
1143 | struct route_entry *re = re_list_first(&dest->routes); | |
1144 | ||
1145 | zlog_debug("%s(%u:%u):%s: Processing rn %p", | |
1146 | VRF_LOGNAME(vrf), vrf_id, re->table, buf, | |
1147 | rn); | |
1148 | } | |
1149 | ||
607425e5 | 1150 | old_fib = dest->selected_fib; |
f5158712 | 1151 | } |
5f7a4718 | 1152 | |
a2addae8 | 1153 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
61e6de9d DS |
1154 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { |
1155 | char flags_buf[128]; | |
1156 | char status_buf[128]; | |
1157 | ||
d62a17ae | 1158 | zlog_debug( |
61e6de9d | 1159 | "%s(%u:%u):%s: Examine re %p (%s) status: %sflags: %sdist %d metric %d", |
c2c02b76 | 1160 | VRF_LOGNAME(vrf), vrf_id, re->table, buf, re, |
61e6de9d DS |
1161 | zebra_route_string(re->type), |
1162 | _dump_re_status(re, status_buf, | |
1163 | sizeof(status_buf)), | |
1164 | zclient_dump_route_flags(re->flags, flags_buf, | |
1165 | sizeof(flags_buf)), | |
1166 | re->distance, re->metric); | |
1167 | } | |
d62a17ae | 1168 | |
d62a17ae | 1169 | /* Currently selected re. */ |
1170 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { | |
1171 | assert(old_selected == NULL); | |
1172 | old_selected = re; | |
1173 | } | |
bab85d4f | 1174 | |
d62a17ae | 1175 | /* Skip deleted entries from selection */ |
1176 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
1177 | continue; | |
1178 | ||
9d221fac DS |
1179 | /* |
1180 | * If the route entry has changed, verify/resolve | |
1181 | * the nexthops associated with the entry. | |
1182 | * | |
1183 | * In any event if we have nexthops that are not active | |
1184 | * then we cannot use this particular route entry so | |
1185 | * skip it. | |
d62a17ae | 1186 | */ |
9d221fac DS |
1187 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED)) { |
1188 | if (!nexthop_active_update(rn, re)) { | |
7e010c4b DS |
1189 | const struct prefix *p; |
1190 | struct rib_table_info *info; | |
1191 | ||
9d221fac DS |
1192 | if (re->type == ZEBRA_ROUTE_TABLE) { |
1193 | /* XXX: HERE BE DRAGONS!!!!! | |
1194 | * In all honesty, I have not yet | |
1195 | * figured out what this part does or | |
1196 | * why the ROUTE_ENTRY_CHANGED test | |
1197 | * above is correct or why we need to | |
1198 | * delete a route here, and also not | |
1199 | * whether this concerns both selected | |
1200 | * and fib route, or only selected | |
1201 | * or only fib | |
1202 | * | |
1203 | * This entry was denied by the 'ip | |
1204 | * protocol | |
1205 | * table' route-map, we need to delete | |
1206 | * it */ | |
1207 | if (re != old_selected) { | |
1208 | if (IS_ZEBRA_DEBUG_RIB) | |
1209 | zlog_debug( | |
1210 | "%s: %s(%u):%s: imported via import-table but denied by the ip protocol table route-map", | |
1211 | __func__, | |
1212 | VRF_LOGNAME( | |
1213 | vrf), | |
1214 | vrf_id, buf); | |
1215 | rib_unlink(rn, re); | |
1216 | } else | |
1217 | SET_FLAG(re->status, | |
1218 | ROUTE_ENTRY_REMOVED); | |
1219 | } | |
d62a17ae | 1220 | |
7e010c4b DS |
1221 | info = srcdest_rnode_table_info(rn); |
1222 | srcdest_rnode_prefixes(rn, &p, NULL); | |
1223 | zsend_route_notify_owner(re, p, | |
1224 | ZAPI_ROUTE_FAIL_INSTALL, | |
1225 | info->afi, info->safi); | |
9d221fac DS |
1226 | continue; |
1227 | } | |
1228 | } else { | |
1229 | /* | |
1230 | * If the re has not changed and the nhg we have is | |
1231 | * not usable, then we cannot use this route entry | |
1232 | * for consideration, as that the route will just | |
1233 | * not install if it is selected. | |
1234 | */ | |
1235 | if (!nexthop_group_active_nexthop_num(&re->nhe->nhg)) | |
1236 | continue; | |
d62a17ae | 1237 | } |
bab85d4f | 1238 | |
d62a17ae | 1239 | /* Infinite distance. */ |
3332f4f0 DS |
1240 | if (re->distance == DISTANCE_INFINITY && |
1241 | re->type != ZEBRA_ROUTE_KERNEL) { | |
d62a17ae | 1242 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); |
1243 | continue; | |
1244 | } | |
bab85d4f | 1245 | |
d62a17ae | 1246 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_FIB_OVERRIDE)) { |
1247 | best = rib_choose_best(new_fib, re); | |
1248 | if (new_fib && best != new_fib) | |
1249 | UNSET_FLAG(new_fib->status, | |
1250 | ROUTE_ENTRY_CHANGED); | |
1251 | new_fib = best; | |
1252 | } else { | |
1253 | best = rib_choose_best(new_selected, re); | |
1254 | if (new_selected && best != new_selected) | |
1255 | UNSET_FLAG(new_selected->status, | |
1256 | ROUTE_ENTRY_CHANGED); | |
1257 | new_selected = best; | |
1258 | } | |
1259 | if (best != re) | |
1260 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
1261 | } /* RNODE_FOREACH_RE */ | |
1262 | ||
1263 | /* If no FIB override route, use the selected route also for FIB */ | |
1264 | if (new_fib == NULL) | |
1265 | new_fib = new_selected; | |
1266 | ||
1267 | /* After the cycle is finished, the following pointers will be set: | |
1268 | * old_selected --- RE entry currently having SELECTED | |
1269 | * new_selected --- RE entry that is newly SELECTED | |
1270 | * old_fib --- RE entry currently in kernel FIB | |
1271 | * new_fib --- RE entry that is newly to be in kernel FIB | |
1272 | * | |
1273 | * new_selected will get SELECTED flag, and is going to be redistributed | |
1274 | * the zclients. new_fib (which can be new_selected) will be installed | |
1275 | * in kernel. | |
1276 | */ | |
1277 | ||
1278 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { | |
c2c02b76 DS |
1279 | struct route_entry *entry; |
1280 | ||
1281 | entry = old_selected | |
1282 | ? old_selected | |
1283 | : new_selected | |
1284 | ? new_selected | |
1285 | : old_fib ? old_fib | |
1286 | : new_fib ? new_fib : NULL; | |
1287 | ||
d62a17ae | 1288 | zlog_debug( |
c2c02b76 DS |
1289 | "%s(%u:%u):%s: After processing: old_selected %p new_selected %p old_fib %p new_fib %p", |
1290 | VRF_LOGNAME(vrf), vrf_id, entry ? entry->table : 0, buf, | |
1291 | (void *)old_selected, (void *)new_selected, | |
1292 | (void *)old_fib, (void *)new_fib); | |
d62a17ae | 1293 | } |
446bb95e | 1294 | |
d62a17ae | 1295 | /* Buffer ROUTE_ENTRY_CHANGED here, because it will get cleared if |
1296 | * fib == selected */ | |
9d303b37 DL |
1297 | bool selected_changed = new_selected && CHECK_FLAG(new_selected->status, |
1298 | ROUTE_ENTRY_CHANGED); | |
d62a17ae | 1299 | |
1300 | /* Update fib according to selection results */ | |
1301 | if (new_fib && old_fib) | |
1302 | rib_process_update_fib(zvrf, rn, old_fib, new_fib); | |
1303 | else if (new_fib) | |
1304 | rib_process_add_fib(zvrf, rn, new_fib); | |
1305 | else if (old_fib) | |
1306 | rib_process_del_fib(zvrf, rn, old_fib); | |
1307 | ||
8cb41cd6 | 1308 | /* Update SELECTED entry */ |
d62a17ae | 1309 | if (old_selected != new_selected || selected_changed) { |
93bdadae | 1310 | |
6883bf8d | 1311 | if (new_selected && new_selected != new_fib) |
d62a17ae | 1312 | UNSET_FLAG(new_selected->status, ROUTE_ENTRY_CHANGED); |
41ec9222 | 1313 | |
3cdba47a | 1314 | if (new_selected) |
5af4b346 MS |
1315 | SET_FLAG(new_selected->flags, ZEBRA_FLAG_SELECTED); |
1316 | ||
d62a17ae | 1317 | if (old_selected) { |
40f321c0 MS |
1318 | /* |
1319 | * If we're removing the old entry, we should tell | |
1320 | * redist subscribers about that *if* they aren't | |
1321 | * going to see a redist for the new entry. | |
1322 | */ | |
1323 | if (!new_selected || CHECK_FLAG(old_selected->status, | |
1324 | ROUTE_ENTRY_REMOVED)) | |
1325 | redistribute_delete(p, src_p, | |
1326 | old_selected, | |
1327 | new_selected); | |
1328 | ||
d62a17ae | 1329 | if (old_selected != new_selected) |
1330 | UNSET_FLAG(old_selected->flags, | |
1331 | ZEBRA_FLAG_SELECTED); | |
f857321e | 1332 | } |
d62a17ae | 1333 | } |
3e5c6e00 | 1334 | |
d62a17ae | 1335 | /* Remove all RE entries queued for removal */ |
a2addae8 | 1336 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 1337 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { |
1338 | if (IS_ZEBRA_DEBUG_RIB) { | |
1339 | rnode_debug(rn, vrf_id, "rn %p, removing re %p", | |
1340 | (void *)rn, (void *)re); | |
1341 | } | |
1342 | rib_unlink(rn, re); | |
1343 | } | |
1344 | } | |
4d38fdb4 | 1345 | |
d62a17ae | 1346 | /* |
1347 | * Check if the dest can be deleted now. | |
1348 | */ | |
1349 | rib_gc_dest(rn); | |
e96f9203 DO |
1350 | } |
1351 | ||
a1494c25 DS |
1352 | static void zebra_rib_evaluate_mpls(struct route_node *rn) |
1353 | { | |
1354 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
1355 | struct zebra_vrf *zvrf = vrf_info_lookup(VRF_DEFAULT); | |
1356 | ||
1357 | if (!dest) | |
1358 | return; | |
1359 | ||
1360 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_LSPS)) { | |
1361 | if (IS_ZEBRA_DEBUG_MPLS) | |
1362 | zlog_debug( | |
bd47f3a3 JU |
1363 | "%s(%u): Scheduling all LSPs upon RIB completion", |
1364 | zvrf_name(zvrf), zvrf_id(zvrf)); | |
a1494c25 DS |
1365 | zebra_mpls_lsp_schedule(zvrf); |
1366 | mpls_unmark_lsps_for_processing(rn); | |
1367 | } | |
1368 | } | |
1369 | ||
e5ac2adf MS |
1370 | /* |
1371 | * Utility to match route with dplane context data | |
1372 | */ | |
1373 | static bool rib_route_match_ctx(const struct route_entry *re, | |
25779064 MS |
1374 | const struct zebra_dplane_ctx *ctx, |
1375 | bool is_update) | |
e5ac2adf MS |
1376 | { |
1377 | bool result = false; | |
1378 | ||
1379 | if (is_update) { | |
1380 | /* | |
1381 | * In 'update' case, we test info about the 'previous' or | |
1382 | * 'old' route | |
1383 | */ | |
1384 | if ((re->type == dplane_ctx_get_old_type(ctx)) && | |
1385 | (re->instance == dplane_ctx_get_old_instance(ctx))) { | |
1386 | result = true; | |
1387 | ||
9db35a5e MS |
1388 | /* We use an extra test for statics, and another for |
1389 | * kernel routes. | |
e5ac2adf MS |
1390 | */ |
1391 | if (re->type == ZEBRA_ROUTE_STATIC && | |
1392 | (re->distance != dplane_ctx_get_old_distance(ctx) || | |
1393 | re->tag != dplane_ctx_get_old_tag(ctx))) { | |
1394 | result = false; | |
9db35a5e MS |
1395 | } else if (re->type == ZEBRA_ROUTE_KERNEL && |
1396 | re->metric != | |
1397 | dplane_ctx_get_old_metric(ctx)) { | |
1398 | result = false; | |
e5ac2adf MS |
1399 | } |
1400 | } | |
1401 | ||
1402 | } else { | |
1403 | /* | |
1404 | * Ordinary, single-route case using primary context info | |
1405 | */ | |
1406 | if ((dplane_ctx_get_op(ctx) != DPLANE_OP_ROUTE_DELETE) && | |
1407 | CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
1408 | /* Skip route that's been deleted */ | |
1409 | goto done; | |
1410 | } | |
1411 | ||
1412 | if ((re->type == dplane_ctx_get_type(ctx)) && | |
1413 | (re->instance == dplane_ctx_get_instance(ctx))) { | |
1414 | result = true; | |
1415 | ||
9db35a5e MS |
1416 | /* We use an extra test for statics, and another for |
1417 | * kernel routes. | |
e5ac2adf MS |
1418 | */ |
1419 | if (re->type == ZEBRA_ROUTE_STATIC && | |
1420 | (re->distance != dplane_ctx_get_distance(ctx) || | |
1421 | re->tag != dplane_ctx_get_tag(ctx))) { | |
1422 | result = false; | |
9db35a5e MS |
1423 | } else if (re->type == ZEBRA_ROUTE_KERNEL && |
1424 | re->metric != dplane_ctx_get_metric(ctx)) { | |
1425 | result = false; | |
1426 | } else if (re->type == ZEBRA_ROUTE_CONNECT) { | |
1427 | result = nexthop_group_equal_no_recurse( | |
1428 | &re->nhe->nhg, dplane_ctx_get_ng(ctx)); | |
e5ac2adf MS |
1429 | } |
1430 | } | |
1431 | } | |
1432 | ||
1433 | done: | |
1434 | ||
1435 | return (result); | |
1436 | } | |
1437 | ||
3cdba47a DS |
1438 | static void zebra_rib_fixup_system(struct route_node *rn) |
1439 | { | |
1440 | struct route_entry *re; | |
1441 | ||
1442 | RNODE_FOREACH_RE(rn, re) { | |
1443 | struct nexthop *nhop; | |
1444 | ||
1445 | if (!RIB_SYSTEM_ROUTE(re)) | |
1446 | continue; | |
1447 | ||
1448 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
1449 | continue; | |
1450 | ||
1451 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
6d0ee6a0 | 1452 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); |
3cdba47a | 1453 | |
c415d895 | 1454 | for (ALL_NEXTHOPS(re->nhe->nhg, nhop)) { |
3cdba47a DS |
1455 | if (CHECK_FLAG(nhop->flags, NEXTHOP_FLAG_RECURSIVE)) |
1456 | continue; | |
1457 | ||
1458 | SET_FLAG(nhop->flags, NEXTHOP_FLAG_FIB); | |
1459 | } | |
1460 | } | |
1461 | } | |
1462 | ||
9db35a5e MS |
1463 | /* Route comparison logic, with various special cases. */ |
1464 | static bool rib_compare_routes(const struct route_entry *re1, | |
1465 | const struct route_entry *re2) | |
1466 | { | |
9db35a5e MS |
1467 | if (re1->type != re2->type) |
1468 | return false; | |
1469 | ||
1470 | if (re1->instance != re2->instance) | |
1471 | return false; | |
1472 | ||
1473 | if (re1->type == ZEBRA_ROUTE_KERNEL && re1->metric != re2->metric) | |
1474 | return false; | |
1475 | ||
1476 | if (CHECK_FLAG(re1->flags, ZEBRA_FLAG_RR_USE_DISTANCE) && | |
1477 | re1->distance != re2->distance) | |
1478 | return false; | |
1479 | ||
87009d7d MS |
1480 | /* We support multiple connected routes: this supports multiple |
1481 | * v6 link-locals, and we also support multiple addresses in the same | |
1482 | * subnet on a single interface. | |
1483 | */ | |
9db35a5e MS |
1484 | if (re1->type != ZEBRA_ROUTE_CONNECT) |
1485 | return true; | |
1486 | ||
87009d7d | 1487 | return false; |
9db35a5e MS |
1488 | } |
1489 | ||
9959f1da MS |
1490 | /* |
1491 | * Compare nexthop lists from a route and a dplane context; test whether | |
1492 | * the list installed in the FIB matches the route's list. | |
1493 | * Set 'changed_p' to 'true' if there were changes to the route's | |
1494 | * installed nexthops. | |
1495 | * | |
1496 | * Return 'false' if any ACTIVE route nexthops are not mentioned in the FIB | |
1497 | * list. | |
1498 | */ | |
1499 | static bool rib_update_nhg_from_ctx(struct nexthop_group *re_nhg, | |
1500 | const struct nexthop_group *ctx_nhg, | |
1501 | bool *changed_p) | |
1502 | { | |
1503 | bool matched_p = true; | |
1504 | struct nexthop *nexthop, *ctx_nexthop; | |
1505 | ||
1506 | /* Get the first `installed` one to check against. | |
1507 | * If the dataplane doesn't set these to be what was actually installed, | |
1508 | * it will just be whatever was in re->nhe->nhg? | |
1509 | */ | |
1510 | ctx_nexthop = ctx_nhg->nexthop; | |
1511 | ||
1512 | if (CHECK_FLAG(ctx_nexthop->flags, NEXTHOP_FLAG_RECURSIVE) | |
1513 | || !CHECK_FLAG(ctx_nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1514 | ctx_nexthop = nexthop_next_active_resolved(ctx_nexthop); | |
1515 | ||
1516 | for (ALL_NEXTHOPS_PTR(re_nhg, nexthop)) { | |
1517 | ||
1518 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1519 | continue; | |
1520 | ||
1521 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1522 | continue; | |
1523 | ||
1524 | /* Check for a FIB nexthop corresponding to the RIB nexthop */ | |
7483dcbe | 1525 | if (!nexthop_same(ctx_nexthop, nexthop)) { |
9959f1da MS |
1526 | /* If the FIB doesn't know about the nexthop, |
1527 | * it's not installed | |
1528 | */ | |
1529 | if (IS_ZEBRA_DEBUG_RIB_DETAILED || | |
1530 | IS_ZEBRA_DEBUG_NHG_DETAIL) { | |
1531 | zlog_debug("%s: no ctx match for rib nh %pNHv %s", | |
1532 | __func__, nexthop, | |
1533 | (CHECK_FLAG(nexthop->flags, | |
1534 | NEXTHOP_FLAG_FIB) ? | |
1535 | "(FIB)":"")); | |
1536 | } | |
1537 | matched_p = false; | |
1538 | ||
1539 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1540 | *changed_p = true; | |
1541 | ||
1542 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1543 | ||
1544 | /* Keep checking nexthops */ | |
1545 | continue; | |
1546 | } | |
1547 | ||
1548 | if (CHECK_FLAG(ctx_nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
1549 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
1550 | if (IS_ZEBRA_DEBUG_NHG_DETAIL) | |
1551 | zlog_debug("%s: rib nh %pNHv -> installed", | |
1552 | __func__, nexthop); | |
1553 | ||
1554 | *changed_p = true; | |
1555 | } | |
1556 | ||
1557 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1558 | } else { | |
1559 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
1560 | if (IS_ZEBRA_DEBUG_NHG_DETAIL) | |
1561 | zlog_debug("%s: rib nh %pNHv -> uninstalled", | |
1562 | __func__, nexthop); | |
1563 | ||
1564 | *changed_p = true; | |
1565 | } | |
1566 | ||
1567 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1568 | } | |
1569 | ||
1570 | ctx_nexthop = nexthop_next_active_resolved(ctx_nexthop); | |
1571 | } | |
1572 | ||
1573 | return matched_p; | |
1574 | } | |
1575 | ||
e5ac2adf | 1576 | /* |
78bf56b0 MS |
1577 | * Update a route from a dplane context. This consolidates common code |
1578 | * that can be used in processing of results from FIB updates, and in | |
1579 | * async notification processing. | |
efe6c026 | 1580 | * The return is 'true' if the installed nexthops changed; 'false' otherwise. |
e5ac2adf | 1581 | */ |
efe6c026 MS |
1582 | static bool rib_update_re_from_ctx(struct route_entry *re, |
1583 | struct route_node *rn, | |
1584 | struct zebra_dplane_ctx *ctx) | |
78bf56b0 | 1585 | { |
9959f1da | 1586 | struct nexthop *nexthop; |
941e261c MS |
1587 | bool matched; |
1588 | const struct nexthop_group *ctxnhg; | |
9959f1da | 1589 | struct nexthop_group *re_nhg; |
efe6c026 MS |
1590 | bool is_selected = false; /* Is 're' currently the selected re? */ |
1591 | bool changed_p = false; /* Change to nexthops? */ | |
1592 | rib_dest_t *dest; | |
bd47f3a3 JU |
1593 | struct vrf *vrf; |
1594 | ||
1595 | vrf = vrf_lookup_by_id(re->vrf_id); | |
78bf56b0 | 1596 | |
efe6c026 MS |
1597 | dest = rib_dest_from_rnode(rn); |
1598 | if (dest) | |
1599 | is_selected = (re == dest->selected_fib); | |
1600 | ||
1601 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2919eea8 DS |
1602 | zlog_debug("update_from_ctx: %s(%u:%u):%pRN: %sSELECTED, re %p", |
1603 | VRF_LOGNAME(vrf), re->vrf_id, re->table, rn, | |
9db35a5e | 1604 | (is_selected ? "" : "NOT "), re); |
efe6c026 MS |
1605 | |
1606 | /* Update zebra's nexthop FIB flag for each nexthop that was installed. | |
941e261c | 1607 | * If the installed set differs from the set requested by the rib/owner, |
efe6c026 MS |
1608 | * we use the fib-specific nexthop-group to record the actual FIB |
1609 | * status. | |
78bf56b0 | 1610 | */ |
a126f120 MS |
1611 | matched = false; |
1612 | ctxnhg = dplane_ctx_get_ng(ctx); | |
941e261c | 1613 | |
9959f1da | 1614 | /* Check route's fib group and incoming notif group for equivalence. |
986a6617 SW |
1615 | * |
1616 | * Let's assume the nexthops are ordered here to save time. | |
941e261c | 1617 | */ |
9959f1da MS |
1618 | /* TODO -- this isn't testing or comparing the FIB flags; we should |
1619 | * do a more explicit loop, checking the incoming notification's flags. | |
1620 | */ | |
a126f120 MS |
1621 | if (re->fib_ng.nexthop && ctxnhg->nexthop && |
1622 | nexthop_group_equal(&re->fib_ng, ctxnhg)) | |
986a6617 | 1623 | matched = true; |
941e261c MS |
1624 | |
1625 | /* If the new FIB set matches the existing FIB set, we're done. */ | |
1626 | if (matched) { | |
1627 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 | 1628 | zlog_debug( |
2919eea8 DS |
1629 | "%s(%u:%u):%pRN update_from_ctx(): existing fib nhg, no change", |
1630 | VRF_LOGNAME(vrf), re->vrf_id, re->table, rn); | |
9959f1da | 1631 | goto check_backups; |
941e261c | 1632 | |
7483dcbe | 1633 | } else if (CHECK_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG)) { |
941e261c MS |
1634 | /* |
1635 | * Free stale fib list and move on to check the rib nhg. | |
1636 | */ | |
1637 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 | 1638 | zlog_debug( |
2919eea8 DS |
1639 | "%s(%u:%u):%pRN update_from_ctx(): replacing fib nhg", |
1640 | VRF_LOGNAME(vrf), re->vrf_id, re->table, rn); | |
941e261c MS |
1641 | nexthops_free(re->fib_ng.nexthop); |
1642 | re->fib_ng.nexthop = NULL; | |
efe6c026 | 1643 | |
7483dcbe MS |
1644 | UNSET_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG); |
1645 | ||
efe6c026 MS |
1646 | /* Note that the installed nexthops have changed */ |
1647 | changed_p = true; | |
941e261c MS |
1648 | } else { |
1649 | if (IS_ZEBRA_DEBUG_RIB) | |
2919eea8 DS |
1650 | zlog_debug( |
1651 | "%s(%u:%u):%pRN update_from_ctx(): no fib nhg", | |
1652 | VRF_LOGNAME(vrf), re->vrf_id, re->table, rn); | |
941e261c MS |
1653 | } |
1654 | ||
1655 | /* | |
1656 | * Compare with the rib nexthop group. The comparison here is different: | |
1657 | * the RIB group may be a superset of the list installed in the FIB. We | |
1658 | * walk the RIB group, looking for the 'installable' candidate | |
1659 | * nexthops, and then check those against the set | |
1660 | * that is actually installed. | |
986a6617 SW |
1661 | * |
1662 | * Assume nexthops are ordered here as well. | |
941e261c | 1663 | */ |
986a6617 | 1664 | |
9959f1da | 1665 | /* If nothing is installed, we can skip some of the checking/comparison |
1f6a5aca MS |
1666 | * of nexthops. |
1667 | */ | |
9959f1da | 1668 | if (ctxnhg->nexthop == NULL) { |
1f6a5aca MS |
1669 | changed_p = true; |
1670 | goto no_nexthops; | |
1671 | } | |
1672 | ||
9959f1da | 1673 | matched = rib_update_nhg_from_ctx(&(re->nhe->nhg), ctxnhg, &changed_p); |
78bf56b0 | 1674 | |
941e261c MS |
1675 | /* If all nexthops were processed, we're done */ |
1676 | if (matched) { | |
1677 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 | 1678 | zlog_debug( |
2919eea8 DS |
1679 | "%s(%u:%u):%pRN update_from_ctx(): rib nhg matched, changed '%s'", |
1680 | VRF_LOGNAME(vrf), re->vrf_id, re->table, rn, | |
1681 | (changed_p ? "true" : "false")); | |
9959f1da | 1682 | goto check_backups; |
941e261c | 1683 | } |
78bf56b0 | 1684 | |
1f6a5aca MS |
1685 | no_nexthops: |
1686 | ||
941e261c MS |
1687 | /* FIB nexthop set differs from the RIB set: |
1688 | * create a fib-specific nexthop-group | |
1689 | */ | |
1690 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 | 1691 | zlog_debug( |
2919eea8 DS |
1692 | "%s(%u:%u):%pRN update_from_ctx(): changed %s, adding new fib nhg%s", |
1693 | VRF_LOGNAME(vrf), re->vrf_id, re->table, rn, | |
7483dcbe MS |
1694 | (changed_p ? "true" : "false"), |
1695 | ctxnhg->nexthop != NULL ? "" : " (empty)"); | |
941e261c | 1696 | |
7483dcbe MS |
1697 | /* Set the flag about the dedicated fib list */ |
1698 | SET_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG); | |
188a00e0 MS |
1699 | if (ctxnhg->nexthop) |
1700 | copy_nexthops(&(re->fib_ng.nexthop), ctxnhg->nexthop, NULL); | |
941e261c | 1701 | |
9959f1da MS |
1702 | check_backups: |
1703 | ||
1704 | /* | |
1705 | * Check the status of the route's backup nexthops, if any. | |
1706 | * The logic for backups is somewhat different: if any backup is | |
1707 | * installed, a new fib nhg will be attached to the route. | |
1708 | */ | |
1709 | re_nhg = zebra_nhg_get_backup_nhg(re->nhe); | |
1710 | if (re_nhg == NULL) | |
1711 | goto done; /* No backup nexthops */ | |
1712 | ||
1713 | /* First check the route's 'fib' list of backups, if it's present | |
1714 | * from some previous event. | |
1715 | */ | |
1716 | re_nhg = &re->fib_backup_ng; | |
1717 | ctxnhg = dplane_ctx_get_backup_ng(ctx); | |
1718 | ||
1719 | matched = false; | |
1720 | if (re_nhg->nexthop && ctxnhg && nexthop_group_equal(re_nhg, ctxnhg)) | |
1721 | matched = true; | |
1722 | ||
1723 | /* If the new FIB set matches an existing FIB set, we're done. */ | |
1724 | if (matched) { | |
1725 | if (IS_ZEBRA_DEBUG_RIB) | |
1726 | zlog_debug( | |
2919eea8 DS |
1727 | "%s(%u):%pRN update_from_ctx(): existing fib backup nhg, no change", |
1728 | VRF_LOGNAME(vrf), re->vrf_id, rn); | |
9959f1da MS |
1729 | goto done; |
1730 | ||
1731 | } else if (re->fib_backup_ng.nexthop) { | |
1732 | /* | |
1733 | * Free stale fib backup list and move on to check | |
1734 | * the route's backups. | |
1735 | */ | |
1736 | if (IS_ZEBRA_DEBUG_RIB) | |
1737 | zlog_debug( | |
2919eea8 DS |
1738 | "%s(%u):%pRN update_from_ctx(): replacing fib backup nhg", |
1739 | VRF_LOGNAME(vrf), re->vrf_id, rn); | |
9959f1da MS |
1740 | nexthops_free(re->fib_backup_ng.nexthop); |
1741 | re->fib_backup_ng.nexthop = NULL; | |
1742 | ||
1743 | /* Note that the installed nexthops have changed */ | |
1744 | changed_p = true; | |
1745 | } else { | |
1746 | if (IS_ZEBRA_DEBUG_RIB) | |
2919eea8 DS |
1747 | zlog_debug( |
1748 | "%s(%u):%pRN update_from_ctx(): no fib backup nhg", | |
1749 | VRF_LOGNAME(vrf), re->vrf_id, rn); | |
9959f1da MS |
1750 | } |
1751 | ||
1752 | /* | |
7483dcbe | 1753 | * If a FIB backup nexthop set exists, attach a copy |
9959f1da MS |
1754 | * to the route if any backup is installed |
1755 | */ | |
1756 | if (ctxnhg && ctxnhg->nexthop) { | |
1757 | ||
1758 | for (ALL_NEXTHOPS_PTR(ctxnhg, nexthop)) { | |
1759 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1760 | break; | |
1761 | } | |
1762 | ||
1763 | /* If no installed backups, we're done */ | |
1764 | if (nexthop == NULL) | |
1765 | goto done; | |
1766 | ||
1767 | if (IS_ZEBRA_DEBUG_RIB) | |
2919eea8 DS |
1768 | zlog_debug( |
1769 | "%s(%u):%pRN update_from_ctx(): changed %s, adding new backup fib nhg", | |
1770 | VRF_LOGNAME(vrf), re->vrf_id, rn, | |
1771 | (changed_p ? "true" : "false")); | |
9959f1da MS |
1772 | |
1773 | copy_nexthops(&(re->fib_backup_ng.nexthop), ctxnhg->nexthop, | |
1774 | NULL); | |
1775 | } | |
1776 | ||
941e261c | 1777 | done: |
9959f1da | 1778 | |
efe6c026 | 1779 | return changed_p; |
78bf56b0 MS |
1780 | } |
1781 | ||
e5ac2adf | 1782 | /* |
fad4d69c MS |
1783 | * Helper to locate a zebra route-node from a dplane context. This is used |
1784 | * when processing dplane results, e.g. Note well: the route-node is returned | |
1785 | * with a ref held - route_unlock_node() must be called eventually. | |
e5ac2adf | 1786 | */ |
fad4d69c MS |
1787 | static struct route_node * |
1788 | rib_find_rn_from_ctx(const struct zebra_dplane_ctx *ctx) | |
e5ac2adf MS |
1789 | { |
1790 | struct route_table *table = NULL; | |
1791 | struct route_node *rn = NULL; | |
e5ac2adf MS |
1792 | const struct prefix *dest_pfx, *src_pfx; |
1793 | ||
1794 | /* Locate rn and re(s) from ctx */ | |
1795 | ||
c7c0b007 SW |
1796 | table = zebra_vrf_lookup_table_with_table_id( |
1797 | dplane_ctx_get_afi(ctx), dplane_ctx_get_safi(ctx), | |
1798 | dplane_ctx_get_vrf(ctx), dplane_ctx_get_table(ctx)); | |
e5ac2adf MS |
1799 | if (table == NULL) { |
1800 | if (IS_ZEBRA_DEBUG_DPLANE) { | |
bd47f3a3 JU |
1801 | zlog_debug( |
1802 | "Failed to find route for ctx: no table for afi %d, safi %d, vrf %s(%u)", | |
1803 | dplane_ctx_get_afi(ctx), | |
1804 | dplane_ctx_get_safi(ctx), | |
1805 | vrf_id_to_name(dplane_ctx_get_vrf(ctx)), | |
1806 | dplane_ctx_get_vrf(ctx)); | |
e5ac2adf MS |
1807 | } |
1808 | goto done; | |
1809 | } | |
1810 | ||
fad4d69c MS |
1811 | dest_pfx = dplane_ctx_get_dest(ctx); |
1812 | src_pfx = dplane_ctx_get_src(ctx); | |
1813 | ||
1814 | rn = srcdest_rnode_get(table, dest_pfx, | |
1815 | src_pfx ? (struct prefix_ipv6 *)src_pfx : NULL); | |
1816 | ||
1817 | done: | |
1818 | return rn; | |
1819 | } | |
1820 | ||
1821 | ||
97f5b441 | 1822 | |
fad4d69c MS |
1823 | /* |
1824 | * Route-update results processing after async dataplane update. | |
1825 | */ | |
1826 | static void rib_process_result(struct zebra_dplane_ctx *ctx) | |
1827 | { | |
1828 | struct zebra_vrf *zvrf = NULL; | |
bd47f3a3 | 1829 | struct vrf *vrf; |
fad4d69c MS |
1830 | struct route_node *rn = NULL; |
1831 | struct route_entry *re = NULL, *old_re = NULL, *rib; | |
1832 | bool is_update = false; | |
fad4d69c MS |
1833 | enum dplane_op_e op; |
1834 | enum zebra_dplane_result status; | |
1835 | const struct prefix *dest_pfx, *src_pfx; | |
1836 | uint32_t seq; | |
9db35a5e | 1837 | rib_dest_t *dest; |
efe6c026 | 1838 | bool fib_changed = false; |
77b38a4a | 1839 | struct rib_table_info *info; |
97f5b441 | 1840 | |
fad4d69c | 1841 | zvrf = vrf_info_lookup(dplane_ctx_get_vrf(ctx)); |
bd47f3a3 | 1842 | vrf = vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); |
e5ac2adf MS |
1843 | dest_pfx = dplane_ctx_get_dest(ctx); |
1844 | ||
fad4d69c MS |
1845 | /* Locate rn and re(s) from ctx */ |
1846 | rn = rib_find_rn_from_ctx(ctx); | |
e5ac2adf MS |
1847 | if (rn == NULL) { |
1848 | if (IS_ZEBRA_DEBUG_DPLANE) { | |
bd47f3a3 | 1849 | zlog_debug( |
2919eea8 | 1850 | "Failed to process dplane results: no route for %s(%u):%pFX", |
bd47f3a3 | 1851 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 1852 | dest_pfx); |
e5ac2adf MS |
1853 | } |
1854 | goto done; | |
1855 | } | |
1856 | ||
9db35a5e | 1857 | dest = rib_dest_from_rnode(rn); |
e5ac2adf | 1858 | srcdest_rnode_prefixes(rn, &dest_pfx, &src_pfx); |
77b38a4a | 1859 | info = srcdest_rnode_table_info(rn); |
e5ac2adf MS |
1860 | |
1861 | op = dplane_ctx_get_op(ctx); | |
1862 | status = dplane_ctx_get_status(ctx); | |
1863 | ||
c831033f | 1864 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) |
bd47f3a3 | 1865 | zlog_debug( |
2919eea8 | 1866 | "%s(%u:%u):%pFX Processing dplane result ctx %p, op %s result %s", |
c2c02b76 | 1867 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 1868 | dplane_ctx_get_table(ctx), dest_pfx, ctx, |
c2c02b76 | 1869 | dplane_op2str(op), dplane_res2str(status)); |
e5ac2adf | 1870 | |
e5ac2adf MS |
1871 | /* |
1872 | * Update is a bit of a special case, where we may have both old and new | |
1873 | * routes to post-process. | |
1874 | */ | |
1875 | is_update = dplane_ctx_is_update(ctx); | |
1876 | ||
1877 | /* | |
1878 | * Take a pass through the routes, look for matches with the context | |
1879 | * info. | |
1880 | */ | |
1881 | RNODE_FOREACH_RE(rn, rib) { | |
1882 | ||
1883 | if (re == NULL) { | |
5709131c | 1884 | if (rib_route_match_ctx(rib, ctx, false)) |
e5ac2adf | 1885 | re = rib; |
e5ac2adf MS |
1886 | } |
1887 | ||
1888 | /* Check for old route match */ | |
1889 | if (is_update && (old_re == NULL)) { | |
5709131c | 1890 | if (rib_route_match_ctx(rib, ctx, true /*is_update*/)) |
e5ac2adf | 1891 | old_re = rib; |
e5ac2adf MS |
1892 | } |
1893 | ||
1894 | /* Have we found the routes we need to work on? */ | |
5709131c | 1895 | if (re && ((!is_update || old_re))) |
e5ac2adf | 1896 | break; |
e5ac2adf MS |
1897 | } |
1898 | ||
699dae23 DS |
1899 | seq = dplane_ctx_get_seq(ctx); |
1900 | ||
e5ac2adf MS |
1901 | /* |
1902 | * Check sequence number(s) to detect stale results before continuing | |
1903 | */ | |
60f98b23 | 1904 | if (re) { |
699dae23 | 1905 | if (re->dplane_sequence != seq) { |
60f98b23 | 1906 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) |
bd47f3a3 | 1907 | zlog_debug( |
2919eea8 | 1908 | "%s(%u):%pFX Stale dplane result for re %p", |
bd47f3a3 | 1909 | VRF_LOGNAME(vrf), |
2919eea8 | 1910 | dplane_ctx_get_vrf(ctx), dest_pfx, re); |
e4876266 DS |
1911 | } else { |
1912 | if (!zrouter.asic_offloaded || | |
1913 | (CHECK_FLAG(re->flags, ZEBRA_FLAG_OFFLOADED) || | |
1914 | CHECK_FLAG(re->flags, ZEBRA_FLAG_OFFLOAD_FAILED))) | |
1915 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); | |
1916 | } | |
e5ac2adf MS |
1917 | } |
1918 | ||
60f98b23 DS |
1919 | if (old_re) { |
1920 | if (old_re->dplane_sequence != dplane_ctx_get_old_seq(ctx)) { | |
1921 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) | |
bd47f3a3 | 1922 | zlog_debug( |
2919eea8 | 1923 | "%s(%u:%u):%pFX Stale dplane result for old_re %p", |
bd47f3a3 | 1924 | VRF_LOGNAME(vrf), |
c2c02b76 | 1925 | dplane_ctx_get_vrf(ctx), old_re->table, |
2919eea8 | 1926 | dest_pfx, old_re); |
60f98b23 | 1927 | } else |
9ef0c6ba | 1928 | UNSET_FLAG(old_re->status, ROUTE_ENTRY_QUEUED); |
e5ac2adf MS |
1929 | } |
1930 | ||
12e7fe3a | 1931 | switch (op) { |
12e7fe3a DS |
1932 | case DPLANE_OP_ROUTE_INSTALL: |
1933 | case DPLANE_OP_ROUTE_UPDATE: | |
1934 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
677c1dd5 DS |
1935 | if (re) { |
1936 | UNSET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
1937 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
1938 | } | |
b9f0e5ee DS |
1939 | /* |
1940 | * On an update operation from the same route type | |
1941 | * context retrieval currently has no way to know | |
1942 | * which was the old and which was the new. | |
1943 | * So don't unset our flags that we just set. | |
1944 | * We know redistribution is ok because the | |
1945 | * old_re in this case is used for nothing | |
1946 | * more than knowing whom to contact if necessary. | |
1947 | */ | |
1948 | if (old_re && old_re != re) { | |
677c1dd5 DS |
1949 | UNSET_FLAG(old_re->status, ROUTE_ENTRY_FAILED); |
1950 | UNSET_FLAG(old_re->status, | |
1951 | ROUTE_ENTRY_INSTALLED); | |
1952 | } | |
f183e380 | 1953 | |
78bf56b0 | 1954 | /* Update zebra route based on the results in |
941e261c | 1955 | * the context struct. |
78bf56b0 | 1956 | */ |
941e261c | 1957 | if (re) { |
efe6c026 MS |
1958 | fib_changed = |
1959 | rib_update_re_from_ctx(re, rn, ctx); | |
1960 | ||
1961 | if (!fib_changed) { | |
1962 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) | |
bd47f3a3 | 1963 | zlog_debug( |
2919eea8 | 1964 | "%s(%u:%u):%pFX no fib change for re", |
bd47f3a3 JU |
1965 | VRF_LOGNAME(vrf), |
1966 | dplane_ctx_get_vrf(ctx), | |
c2c02b76 DS |
1967 | dplane_ctx_get_table( |
1968 | ctx), | |
2919eea8 | 1969 | dest_pfx); |
12e7fe3a DS |
1970 | } |
1971 | ||
9db35a5e MS |
1972 | /* Redistribute if this is the selected re */ |
1973 | if (dest && re == dest->selected_fib) | |
1974 | redistribute_update(dest_pfx, src_pfx, | |
1975 | re, old_re); | |
f183e380 MS |
1976 | } |
1977 | ||
3cdba47a DS |
1978 | /* |
1979 | * System routes are weird in that they | |
1980 | * allow multiple to be installed that match | |
1981 | * to the same prefix, so after we get the | |
1982 | * result we need to clean them up so that | |
1983 | * we can actually use them. | |
1984 | */ | |
1985 | if ((re && RIB_SYSTEM_ROUTE(re)) || | |
1986 | (old_re && RIB_SYSTEM_ROUTE(old_re))) | |
1987 | zebra_rib_fixup_system(rn); | |
1988 | ||
f4c6e2a8 | 1989 | if (zvrf) |
12e7fe3a | 1990 | zvrf->installs++; |
f183e380 | 1991 | |
12e7fe3a | 1992 | /* Notify route owner */ |
e4876266 DS |
1993 | if (zebra_router_notify_on_ack()) |
1994 | zsend_route_notify_owner_ctx(ctx, ZAPI_ROUTE_INSTALLED); | |
1995 | else { | |
1996 | if (re) { | |
1997 | if (CHECK_FLAG(re->flags, | |
1998 | ZEBRA_FLAG_OFFLOADED)) | |
1999 | zsend_route_notify_owner_ctx( | |
2000 | ctx, | |
2001 | ZAPI_ROUTE_INSTALLED); | |
2002 | if (CHECK_FLAG( | |
2003 | re->flags, | |
2004 | ZEBRA_FLAG_OFFLOAD_FAILED)) | |
2005 | zsend_route_notify_owner_ctx( | |
2006 | ctx, | |
2007 | ZAPI_ROUTE_FAIL_INSTALL); | |
2008 | } | |
2009 | } | |
12e7fe3a | 2010 | } else { |
7a230a9d | 2011 | if (re) { |
677c1dd5 | 2012 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); |
7a230a9d DS |
2013 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
2014 | } if (old_re) | |
677c1dd5 DS |
2015 | SET_FLAG(old_re->status, ROUTE_ENTRY_FAILED); |
2016 | if (re) | |
2017 | zsend_route_notify_owner(re, dest_pfx, | |
77b38a4a S |
2018 | ZAPI_ROUTE_FAIL_INSTALL, |
2019 | info->afi, info->safi); | |
97f5b441 | 2020 | |
2dbe669b | 2021 | zlog_warn("%s(%u:%u):%pFX: Route install failed", |
bd47f3a3 | 2022 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2dbe669b | 2023 | dplane_ctx_get_table(ctx), dest_pfx); |
12e7fe3a DS |
2024 | } |
2025 | break; | |
2026 | case DPLANE_OP_ROUTE_DELETE: | |
677c1dd5 DS |
2027 | if (re) |
2028 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
12e7fe3a DS |
2029 | /* |
2030 | * In the delete case, the zebra core datastructs were | |
2031 | * updated (or removed) at the time the delete was issued, | |
2032 | * so we're just notifying the route owner. | |
e5ac2adf | 2033 | */ |
12e7fe3a | 2034 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { |
677c1dd5 DS |
2035 | if (re) { |
2036 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
2037 | UNSET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
2038 | } | |
12e7fe3a | 2039 | zsend_route_notify_owner_ctx(ctx, ZAPI_ROUTE_REMOVED); |
e5ac2adf | 2040 | |
12e7fe3a DS |
2041 | if (zvrf) |
2042 | zvrf->removals++; | |
2043 | } else { | |
677c1dd5 DS |
2044 | if (re) |
2045 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
12e7fe3a DS |
2046 | zsend_route_notify_owner_ctx(ctx, |
2047 | ZAPI_ROUTE_REMOVE_FAIL); | |
e5ac2adf | 2048 | |
2dbe669b | 2049 | zlog_warn("%s(%u:%u):%pFX: Route Deletion failure", |
bd47f3a3 | 2050 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2dbe669b | 2051 | dplane_ctx_get_table(ctx), dest_pfx); |
12e7fe3a | 2052 | } |
3cdba47a DS |
2053 | |
2054 | /* | |
2055 | * System routes are weird in that they | |
2056 | * allow multiple to be installed that match | |
2057 | * to the same prefix, so after we get the | |
2058 | * result we need to clean them up so that | |
2059 | * we can actually use them. | |
2060 | */ | |
2061 | if ((re && RIB_SYSTEM_ROUTE(re)) || | |
2062 | (old_re && RIB_SYSTEM_ROUTE(old_re))) | |
2063 | zebra_rib_fixup_system(rn); | |
12e7fe3a | 2064 | break; |
d37f4d6c MS |
2065 | default: |
2066 | break; | |
e5ac2adf | 2067 | } |
699dae23 DS |
2068 | |
2069 | zebra_rib_evaluate_rn_nexthops(rn, seq); | |
a1494c25 | 2070 | zebra_rib_evaluate_mpls(rn); |
e5ac2adf MS |
2071 | done: |
2072 | ||
5f27bcba DS |
2073 | if (rn) |
2074 | route_unlock_node(rn); | |
2075 | ||
e5ac2adf MS |
2076 | /* Return context to dataplane module */ |
2077 | dplane_ctx_fini(&ctx); | |
2078 | } | |
2079 | ||
9959f1da MS |
2080 | /* |
2081 | * Count installed/FIB nexthops | |
2082 | */ | |
2083 | static int rib_count_installed_nh(struct route_entry *re) | |
2084 | { | |
2085 | int count = 0; | |
2086 | struct nexthop *nexthop; | |
2087 | struct nexthop_group *nhg; | |
2088 | ||
2089 | nhg = rib_get_fib_nhg(re); | |
2090 | ||
2091 | for (ALL_NEXTHOPS_PTR(nhg, nexthop)) { | |
2092 | /* The meaningful flag depends on where the installed | |
2093 | * nexthops reside. | |
2094 | */ | |
43a9f66c | 2095 | if (nhg == &(re->fib_ng)) { |
9959f1da MS |
2096 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) |
2097 | count++; | |
2098 | } else { | |
2099 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
2100 | count++; | |
2101 | } | |
2102 | } | |
2103 | ||
43a9f66c MS |
2104 | nhg = rib_get_fib_backup_nhg(re); |
2105 | if (nhg) { | |
2106 | for (ALL_NEXTHOPS_PTR(nhg, nexthop)) { | |
2107 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
2108 | count++; | |
2109 | } | |
9959f1da MS |
2110 | } |
2111 | ||
2112 | return count; | |
2113 | } | |
2114 | ||
54818e3b MS |
2115 | /* |
2116 | * Handle notification from async dataplane: the dataplane has detected | |
2117 | * some change to a route, and notifies zebra so that the control plane | |
2118 | * can reflect that change. | |
2119 | */ | |
2120 | static void rib_process_dplane_notify(struct zebra_dplane_ctx *ctx) | |
2121 | { | |
2122 | struct route_node *rn = NULL; | |
efe6c026 | 2123 | struct route_entry *re = NULL; |
bd47f3a3 | 2124 | struct vrf *vrf; |
efe6c026 | 2125 | struct nexthop *nexthop; |
54818e3b | 2126 | const struct prefix *dest_pfx, *src_pfx; |
941e261c | 2127 | rib_dest_t *dest; |
efe6c026 | 2128 | bool fib_changed = false; |
941e261c | 2129 | bool debug_p = IS_ZEBRA_DEBUG_DPLANE | IS_ZEBRA_DEBUG_RIB; |
efe6c026 | 2130 | int start_count, end_count; |
54818e3b | 2131 | dest_pfx = dplane_ctx_get_dest(ctx); |
bd47f3a3 | 2132 | vrf = vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); |
54818e3b | 2133 | |
54818e3b MS |
2134 | /* Locate rn and re(s) from ctx */ |
2135 | rn = rib_find_rn_from_ctx(ctx); | |
2136 | if (rn == NULL) { | |
941e261c | 2137 | if (debug_p) { |
bd47f3a3 | 2138 | zlog_debug( |
2919eea8 | 2139 | "Failed to process dplane notification: no routes for %s(%u:%u):%pFX", |
bd47f3a3 | 2140 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2141 | dplane_ctx_get_table(ctx), dest_pfx); |
54818e3b MS |
2142 | } |
2143 | goto done; | |
2144 | } | |
2145 | ||
941e261c | 2146 | dest = rib_dest_from_rnode(rn); |
54818e3b MS |
2147 | srcdest_rnode_prefixes(rn, &dest_pfx, &src_pfx); |
2148 | ||
efe6c026 | 2149 | if (debug_p) |
2919eea8 | 2150 | zlog_debug("%s(%u:%u):%pFX Processing dplane notif ctx %p", |
c2c02b76 | 2151 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2152 | dplane_ctx_get_table(ctx), dest_pfx, ctx); |
54818e3b MS |
2153 | |
2154 | /* | |
2155 | * Take a pass through the routes, look for matches with the context | |
2156 | * info. | |
2157 | */ | |
efe6c026 MS |
2158 | RNODE_FOREACH_RE(rn, re) { |
2159 | if (rib_route_match_ctx(re, ctx, false /*!update*/)) | |
54818e3b MS |
2160 | break; |
2161 | } | |
2162 | ||
2163 | /* No match? Nothing we can do */ | |
2164 | if (re == NULL) { | |
941e261c | 2165 | if (debug_p) |
bd47f3a3 | 2166 | zlog_debug( |
2919eea8 | 2167 | "%s(%u:%u):%pFX Unable to process dplane notification: no entry for type %s", |
bd47f3a3 | 2168 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2169 | dplane_ctx_get_table(ctx), dest_pfx, |
bd47f3a3 | 2170 | zebra_route_string(dplane_ctx_get_type(ctx))); |
54818e3b MS |
2171 | |
2172 | goto done; | |
2173 | } | |
2174 | ||
272e8903 | 2175 | /* Ensure we clear the QUEUED flag */ |
e4876266 DS |
2176 | if (!zrouter.asic_offloaded) |
2177 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); | |
272e8903 | 2178 | |
4c0b5436 MS |
2179 | /* Is this a notification that ... matters? We mostly care about |
2180 | * the route that is currently selected for installation; we may also | |
2181 | * get an un-install notification, and handle that too. | |
941e261c MS |
2182 | */ |
2183 | if (re != dest->selected_fib) { | |
4c0b5436 MS |
2184 | /* |
2185 | * If we need to, clean up after a delete that was part of | |
2186 | * an update operation. | |
941e261c | 2187 | */ |
4c0b5436 MS |
2188 | end_count = 0; |
2189 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2190 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
2191 | end_count++; | |
2192 | } | |
2193 | ||
2194 | /* If no nexthops or none installed, ensure that this re | |
2195 | * gets its 'installed' flag cleared. | |
2196 | */ | |
2197 | if (end_count == 0) { | |
2198 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED)) | |
2199 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
2200 | if (debug_p) | |
bd47f3a3 | 2201 | zlog_debug( |
2919eea8 | 2202 | "%s(%u:%u):%pFX dplane notif, uninstalled type %s route", |
bd47f3a3 | 2203 | VRF_LOGNAME(vrf), |
c2c02b76 | 2204 | dplane_ctx_get_vrf(ctx), |
2919eea8 | 2205 | dplane_ctx_get_table(ctx), dest_pfx, |
bd47f3a3 JU |
2206 | zebra_route_string( |
2207 | dplane_ctx_get_type(ctx))); | |
4c0b5436 MS |
2208 | } else { |
2209 | /* At least report on the event. */ | |
2210 | if (debug_p) | |
bd47f3a3 | 2211 | zlog_debug( |
2919eea8 | 2212 | "%s(%u:%u):%pFX dplane notif, but type %s not selected_fib", |
bd47f3a3 | 2213 | VRF_LOGNAME(vrf), |
c2c02b76 | 2214 | dplane_ctx_get_vrf(ctx), |
2919eea8 | 2215 | dplane_ctx_get_table(ctx), dest_pfx, |
bd47f3a3 JU |
2216 | zebra_route_string( |
2217 | dplane_ctx_get_type(ctx))); | |
4c0b5436 | 2218 | } |
941e261c MS |
2219 | goto done; |
2220 | } | |
2221 | ||
efe6c026 MS |
2222 | /* We'll want to determine whether the installation status of the |
2223 | * route has changed: we'll check the status before processing, | |
2224 | * and then again if there's been a change. | |
2225 | */ | |
2226 | start_count = 0; | |
1c30d64b | 2227 | |
9959f1da MS |
2228 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED)) |
2229 | start_count = rib_count_installed_nh(re); | |
efe6c026 | 2230 | |
54818e3b MS |
2231 | /* Update zebra's nexthop FIB flags based on the context struct's |
2232 | * nexthops. | |
2233 | */ | |
efe6c026 | 2234 | fib_changed = rib_update_re_from_ctx(re, rn, ctx); |
54818e3b | 2235 | |
efe6c026 MS |
2236 | if (!fib_changed) { |
2237 | if (debug_p) | |
bd47f3a3 | 2238 | zlog_debug( |
2919eea8 | 2239 | "%s(%u:%u):%pFX dplane notification: rib_update returns FALSE", |
bd47f3a3 | 2240 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2241 | dplane_ctx_get_table(ctx), dest_pfx); |
54818e3b MS |
2242 | } |
2243 | ||
188a00e0 MS |
2244 | /* |
2245 | * Perform follow-up work if the actual status of the prefix | |
efe6c026 | 2246 | * changed. |
941e261c | 2247 | */ |
9959f1da | 2248 | end_count = rib_count_installed_nh(re); |
941e261c | 2249 | |
188a00e0 MS |
2250 | /* Various fib transitions: changed nexthops; from installed to |
2251 | * not-installed; or not-installed to installed. | |
efe6c026 | 2252 | */ |
188a00e0 | 2253 | if (start_count > 0 && end_count > 0) { |
11260e70 | 2254 | if (debug_p) |
bd47f3a3 | 2255 | zlog_debug( |
2919eea8 | 2256 | "%s(%u:%u):%pFX applied nexthop changes from dplane notification", |
bd47f3a3 | 2257 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2258 | dplane_ctx_get_table(ctx), dest_pfx); |
188a00e0 MS |
2259 | |
2260 | /* Changed nexthops - update kernel/others */ | |
2261 | dplane_route_notif_update(rn, re, | |
2262 | DPLANE_OP_ROUTE_UPDATE, ctx); | |
2263 | ||
2264 | } else if (start_count == 0 && end_count > 0) { | |
efe6c026 | 2265 | if (debug_p) |
bd47f3a3 | 2266 | zlog_debug( |
2919eea8 | 2267 | "%s(%u:%u):%pFX installed transition from dplane notification", |
bd47f3a3 | 2268 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2269 | dplane_ctx_get_table(ctx), dest_pfx); |
efe6c026 MS |
2270 | |
2271 | /* We expect this to be the selected route, so we want | |
272e8903 | 2272 | * to tell others about this transition. |
efe6c026 MS |
2273 | */ |
2274 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
2275 | ||
188a00e0 | 2276 | /* Changed nexthops - update kernel/others */ |
9959f1da | 2277 | dplane_route_notif_update(rn, re, DPLANE_OP_ROUTE_UPDATE, ctx); |
188a00e0 | 2278 | |
efe6c026 MS |
2279 | /* Redistribute, lsp, and nht update */ |
2280 | redistribute_update(dest_pfx, src_pfx, re, NULL); | |
2281 | ||
efe6c026 MS |
2282 | } else if (start_count > 0 && end_count == 0) { |
2283 | if (debug_p) | |
bd47f3a3 | 2284 | zlog_debug( |
2919eea8 | 2285 | "%s(%u:%u):%pFX un-installed transition from dplane notification", |
bd47f3a3 | 2286 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2287 | dplane_ctx_get_table(ctx), dest_pfx); |
efe6c026 MS |
2288 | |
2289 | /* Transition from _something_ installed to _nothing_ | |
2290 | * installed. | |
2291 | */ | |
2292 | /* We expect this to be the selected route, so we want | |
2293 | * to tell others about this transistion. | |
2294 | */ | |
2295 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
2296 | ||
188a00e0 MS |
2297 | /* Changed nexthops - update kernel/others */ |
2298 | dplane_route_notif_update(rn, re, DPLANE_OP_ROUTE_DELETE, ctx); | |
2299 | ||
efe6c026 | 2300 | /* Redistribute, lsp, and nht update */ |
40f321c0 | 2301 | redistribute_delete(dest_pfx, src_pfx, re, NULL); |
9287b4c5 | 2302 | } |
efe6c026 | 2303 | |
9287b4c5 MS |
2304 | /* Make any changes visible for lsp and nexthop-tracking processing */ |
2305 | zebra_rib_evaluate_rn_nexthops( | |
2306 | rn, zebra_router_get_next_sequence()); | |
efe6c026 | 2307 | |
9287b4c5 | 2308 | zebra_rib_evaluate_mpls(rn); |
941e261c | 2309 | |
54818e3b | 2310 | done: |
941e261c MS |
2311 | if (rn) |
2312 | route_unlock_node(rn); | |
2313 | ||
54818e3b MS |
2314 | /* Return context to dataplane module */ |
2315 | dplane_ctx_fini(&ctx); | |
2316 | } | |
2317 | ||
04bec7b2 MS |
2318 | /* |
2319 | * Process the nexthop-group workqueue subqueue | |
2320 | */ | |
e22e8001 | 2321 | static void process_subq_nhg(struct listnode *lnode) |
e96f9203 | 2322 | { |
04bec7b2 MS |
2323 | struct nhg_ctx *ctx; |
2324 | struct nhg_hash_entry *nhe, *newnhe; | |
2325 | struct wq_nhg_wrapper *w; | |
e22e8001 | 2326 | uint8_t qindex = route_info[ZEBRA_ROUTE_NHG].meta_q_map; |
5110a0c6 | 2327 | |
04bec7b2 | 2328 | w = listgetdata(lnode); |
e22e8001 | 2329 | |
04bec7b2 | 2330 | if (!w) |
e22e8001 SW |
2331 | return; |
2332 | ||
04bec7b2 MS |
2333 | /* Two types of object - an update from the local kernel, or |
2334 | * an nhg update from a daemon. | |
2335 | */ | |
2336 | if (w->type == WQ_NHG_WRAPPER_TYPE_CTX) { | |
2337 | ctx = w->u.ctx; | |
2338 | ||
2339 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2340 | zlog_debug( | |
2341 | "NHG Context id=%u dequeued from sub-queue %u", | |
2342 | ctx->id, qindex); | |
2343 | ||
2344 | ||
2345 | /* Process nexthop group updates coming 'up' from the OS */ | |
2346 | nhg_ctx_process(ctx); | |
e22e8001 | 2347 | |
04bec7b2 MS |
2348 | } else if (w->type == WQ_NHG_WRAPPER_TYPE_NHG) { |
2349 | nhe = w->u.nhe; | |
2350 | ||
2351 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2352 | zlog_debug("NHG %u dequeued from sub-queue %u", | |
2353 | nhe->id, qindex); | |
2354 | ||
2355 | /* Process incoming nhg update, probably from a proto daemon */ | |
2356 | newnhe = zebra_nhg_proto_add(nhe->id, nhe->type, | |
2357 | nhe->zapi_instance, | |
2358 | nhe->zapi_session, | |
2359 | &nhe->nhg, 0); | |
2360 | ||
2361 | /* Report error to daemon via ZAPI */ | |
2362 | if (newnhe == NULL) | |
2363 | zsend_nhg_notify(nhe->type, nhe->zapi_instance, | |
2364 | nhe->zapi_session, nhe->id, | |
2365 | ZAPI_NHG_FAIL_INSTALL); | |
2366 | ||
2367 | /* Free temp nhe - we own that memory. */ | |
2368 | zebra_nhg_free(nhe); | |
2369 | } | |
e22e8001 | 2370 | |
04bec7b2 | 2371 | XFREE(MTYPE_WQ_NHG_WRAPPER, w); |
e22e8001 SW |
2372 | } |
2373 | ||
2374 | static void process_subq_route(struct listnode *lnode, uint8_t qindex) | |
2375 | { | |
2376 | struct route_node *rnode = NULL; | |
2377 | rib_dest_t *dest = NULL; | |
2378 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 | 2379 | |
d62a17ae | 2380 | rnode = listgetdata(lnode); |
2381 | dest = rib_dest_from_rnode(rnode); | |
c2c02b76 DS |
2382 | assert(dest); |
2383 | ||
2384 | zvrf = rib_dest_vrf(dest); | |
41ec9222 | 2385 | |
d62a17ae | 2386 | rib_process(rnode); |
5110a0c6 | 2387 | |
d62a17ae | 2388 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { |
7e26b9d4 | 2389 | struct route_entry *re = NULL; |
d62a17ae | 2390 | char buf[SRCDEST2STR_BUFFER]; |
efe6c026 | 2391 | |
7e26b9d4 DS |
2392 | /* |
2393 | * rib_process may have freed the dest | |
2394 | * as part of the garbage collection. Let's | |
2395 | * prevent stupidity from happening. | |
2396 | */ | |
2397 | dest = rib_dest_from_rnode(rnode); | |
2398 | if (dest) | |
2399 | re = re_list_first(&dest->routes); | |
2400 | ||
d62a17ae | 2401 | srcdest_rnode2str(rnode, buf, sizeof(buf)); |
c2c02b76 | 2402 | zlog_debug("%s(%u:%u):%s: rn %p dequeued from sub-queue %u", |
04bec7b2 MS |
2403 | zvrf_name(zvrf), zvrf_id(zvrf), re ? re->table : 0, |
2404 | buf, rnode, qindex); | |
d62a17ae | 2405 | } |
41ec9222 | 2406 | |
d62a17ae | 2407 | if (rnode->info) |
2408 | UNSET_FLAG(rib_dest_from_rnode(rnode)->flags, | |
2409 | RIB_ROUTE_QUEUED(qindex)); | |
9fd92e3c | 2410 | |
d62a17ae | 2411 | route_unlock_node(rnode); |
e22e8001 SW |
2412 | } |
2413 | ||
2414 | /* Take a list of route_node structs and return 1, if there was a record | |
2415 | * picked from it and processed by rib_process(). Don't process more, | |
2416 | * than one RN record; operate only in the specified sub-queue. | |
2417 | */ | |
2418 | static unsigned int process_subq(struct list *subq, uint8_t qindex) | |
2419 | { | |
2420 | struct listnode *lnode = listhead(subq); | |
2421 | ||
2422 | if (!lnode) | |
2423 | return 0; | |
2424 | ||
2425 | if (qindex == route_info[ZEBRA_ROUTE_NHG].meta_q_map) | |
2426 | process_subq_nhg(lnode); | |
2427 | else | |
2428 | process_subq_route(lnode, qindex); | |
2429 | ||
d62a17ae | 2430 | list_delete_node(subq, lnode); |
e22e8001 | 2431 | |
d62a17ae | 2432 | return 1; |
e96f9203 DO |
2433 | } |
2434 | ||
2435 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from | |
d62a17ae | 2436 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and |
04bec7b2 | 2437 | * data is pointed to the meta queue structure. |
e96f9203 | 2438 | */ |
d62a17ae | 2439 | static wq_item_status meta_queue_process(struct work_queue *dummy, void *data) |
e96f9203 | 2440 | { |
d62a17ae | 2441 | struct meta_queue *mq = data; |
2442 | unsigned i; | |
91f16812 MS |
2443 | uint32_t queue_len, queue_limit; |
2444 | ||
2445 | /* Ensure there's room for more dataplane updates */ | |
2446 | queue_limit = dplane_get_in_queue_limit(); | |
2447 | queue_len = dplane_get_in_queue_len(); | |
2448 | if (queue_len > queue_limit) { | |
2449 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
8b962e77 MS |
2450 | zlog_debug("rib queue: dplane queue len %u, limit %u, retrying", |
2451 | queue_len, queue_limit); | |
91f16812 MS |
2452 | |
2453 | /* Ensure that the meta-queue is actually enqueued */ | |
489a9614 | 2454 | if (work_queue_empty(zrouter.ribq)) |
ea45a4e7 | 2455 | work_queue_add(zrouter.ribq, zrouter.mq); |
91f16812 MS |
2456 | |
2457 | return WQ_QUEUE_BLOCKED; | |
2458 | } | |
5110a0c6 | 2459 | |
d62a17ae | 2460 | for (i = 0; i < MQ_SIZE; i++) |
2461 | if (process_subq(mq->subq[i], i)) { | |
2462 | mq->size--; | |
2463 | break; | |
2464 | } | |
2465 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; | |
e96f9203 DO |
2466 | } |
2467 | ||
f52ed677 DS |
2468 | |
2469 | /* | |
2470 | * Look into the RN and queue it into the highest priority queue | |
2471 | * at this point in time for processing. | |
2472 | * | |
2473 | * We will enqueue a route node only once per invocation. | |
2474 | * | |
2475 | * There are two possibilities here that should be kept in mind. | |
2476 | * If the original invocation has not been pulled off for processing | |
2477 | * yet, A subsuquent invocation can have a route entry with a better | |
2478 | * meta queue index value and we can have a situation where | |
2479 | * we might have the same node enqueued 2 times. Not necessarily | |
2480 | * an optimal situation but it should be ok. | |
2481 | * | |
2482 | * The other possibility is that the original invocation has not | |
2483 | * been pulled off for processing yet, A subsusquent invocation | |
2484 | * doesn't have a route_entry with a better meta-queue and the | |
2485 | * original metaqueue index value will win and we'll end up with | |
2486 | * the route node enqueued once. | |
e96f9203 | 2487 | */ |
e22e8001 | 2488 | static int rib_meta_queue_add(struct meta_queue *mq, void *data) |
e96f9203 | 2489 | { |
e22e8001 | 2490 | struct route_node *rn = NULL; |
f52ed677 DS |
2491 | struct route_entry *re = NULL, *curr_re = NULL; |
2492 | uint8_t qindex = MQ_SIZE, curr_qindex = MQ_SIZE; | |
5110a0c6 | 2493 | |
e22e8001 SW |
2494 | rn = (struct route_node *)data; |
2495 | ||
f52ed677 DS |
2496 | RNODE_FOREACH_RE (rn, curr_re) { |
2497 | curr_qindex = route_info[curr_re->type].meta_q_map; | |
d62a17ae | 2498 | |
f52ed677 DS |
2499 | if (curr_qindex <= qindex) { |
2500 | re = curr_re; | |
2501 | qindex = curr_qindex; | |
d62a17ae | 2502 | } |
f52ed677 | 2503 | } |
5110a0c6 | 2504 | |
f52ed677 | 2505 | if (!re) |
e22e8001 | 2506 | return -1; |
5110a0c6 | 2507 | |
f52ed677 DS |
2508 | /* Invariant: at this point we always have rn->info set. */ |
2509 | if (CHECK_FLAG(rib_dest_from_rnode(rn)->flags, | |
2510 | RIB_ROUTE_QUEUED(qindex))) { | |
d62a17ae | 2511 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2512 | rnode_debug(rn, re->vrf_id, | |
f52ed677 | 2513 | "rn %p is already queued in sub-queue %u", |
d62a17ae | 2514 | (void *)rn, qindex); |
e22e8001 | 2515 | return -1; |
d62a17ae | 2516 | } |
f52ed677 DS |
2517 | |
2518 | SET_FLAG(rib_dest_from_rnode(rn)->flags, RIB_ROUTE_QUEUED(qindex)); | |
2519 | listnode_add(mq->subq[qindex], rn); | |
2520 | route_lock_node(rn); | |
2521 | mq->size++; | |
2522 | ||
2523 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2524 | rnode_debug(rn, re->vrf_id, "queued rn %p into sub-queue %u", | |
2525 | (void *)rn, qindex); | |
e22e8001 SW |
2526 | |
2527 | return 0; | |
4d38fdb4 | 2528 | } |
2529 | ||
04bec7b2 | 2530 | static int rib_meta_queue_nhg_ctx_add(struct meta_queue *mq, void *data) |
4d38fdb4 | 2531 | { |
e22e8001 SW |
2532 | struct nhg_ctx *ctx = NULL; |
2533 | uint8_t qindex = route_info[ZEBRA_ROUTE_NHG].meta_q_map; | |
04bec7b2 | 2534 | struct wq_nhg_wrapper *w; |
fc328ac9 | 2535 | |
e22e8001 SW |
2536 | ctx = (struct nhg_ctx *)data; |
2537 | ||
2538 | if (!ctx) | |
2539 | return -1; | |
4d38fdb4 | 2540 | |
04bec7b2 MS |
2541 | w = XCALLOC(MTYPE_WQ_NHG_WRAPPER, sizeof(struct wq_nhg_wrapper)); |
2542 | ||
2543 | w->type = WQ_NHG_WRAPPER_TYPE_CTX; | |
2544 | w->u.ctx = ctx; | |
2545 | ||
2546 | listnode_add(mq->subq[qindex], w); | |
e22e8001 SW |
2547 | mq->size++; |
2548 | ||
2549 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2550 | zlog_debug("NHG Context id=%u queued into sub-queue %u", | |
2551 | ctx->id, qindex); | |
2552 | ||
2553 | return 0; | |
2554 | } | |
2555 | ||
04bec7b2 MS |
2556 | static int rib_meta_queue_nhg_add(struct meta_queue *mq, void *data) |
2557 | { | |
2558 | struct nhg_hash_entry *nhe = NULL; | |
2559 | uint8_t qindex = route_info[ZEBRA_ROUTE_NHG].meta_q_map; | |
2560 | struct wq_nhg_wrapper *w; | |
2561 | ||
2562 | nhe = (struct nhg_hash_entry *)data; | |
2563 | ||
2564 | if (!nhe) | |
2565 | return -1; | |
2566 | ||
2567 | w = XCALLOC(MTYPE_WQ_NHG_WRAPPER, sizeof(struct wq_nhg_wrapper)); | |
2568 | ||
2569 | w->type = WQ_NHG_WRAPPER_TYPE_NHG; | |
2570 | w->u.nhe = nhe; | |
2571 | ||
2572 | listnode_add(mq->subq[qindex], w); | |
2573 | mq->size++; | |
2574 | ||
2575 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2576 | zlog_debug("NHG id=%u queued into sub-queue %u", | |
2577 | nhe->id, qindex); | |
2578 | ||
2579 | return 0; | |
2580 | } | |
2581 | ||
e22e8001 SW |
2582 | static int mq_add_handler(void *data, |
2583 | int (*mq_add_func)(struct meta_queue *mq, void *data)) | |
2584 | { | |
489a9614 | 2585 | if (zrouter.ribq == NULL) { |
e914ccbe | 2586 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2587 | "%s: work_queue does not exist!", __func__); |
e22e8001 | 2588 | return -1; |
d62a17ae | 2589 | } |
2590 | ||
2591 | /* | |
2592 | * The RIB queue should normally be either empty or holding the only | |
2593 | * work_queue_item element. In the latter case this element would | |
2594 | * hold a pointer to the meta queue structure, which must be used to | |
2595 | * actually queue the route nodes to process. So create the MQ | |
2596 | * holder, if necessary, then push the work into it in any case. | |
2597 | * This semantics was introduced after 0.99.9 release. | |
2598 | */ | |
489a9614 | 2599 | if (work_queue_empty(zrouter.ribq)) |
ea45a4e7 | 2600 | work_queue_add(zrouter.ribq, zrouter.mq); |
e96f9203 | 2601 | |
e22e8001 SW |
2602 | return mq_add_func(zrouter.mq, data); |
2603 | } | |
fc328ac9 | 2604 | |
e22e8001 SW |
2605 | /* Add route_node to work queue and schedule processing */ |
2606 | int rib_queue_add(struct route_node *rn) | |
2607 | { | |
2608 | assert(rn); | |
2609 | ||
2610 | /* Pointless to queue a route_node with no RIB entries to add or remove | |
2611 | */ | |
2612 | if (!rnode_to_ribs(rn)) { | |
c10e14e9 DS |
2613 | zlog_debug("%s: called for route_node (%p, %u) with no ribs", |
2614 | __func__, (void *)rn, route_node_get_lock_count(rn)); | |
e22e8001 SW |
2615 | zlog_backtrace(LOG_DEBUG); |
2616 | return -1; | |
2617 | } | |
2618 | ||
04bec7b2 | 2619 | return mq_add_handler(rn, rib_meta_queue_add); |
e22e8001 SW |
2620 | } |
2621 | ||
04bec7b2 MS |
2622 | /* |
2623 | * Enqueue incoming nhg info from OS for processing | |
2624 | */ | |
2625 | int rib_queue_nhg_ctx_add(struct nhg_ctx *ctx) | |
e22e8001 SW |
2626 | { |
2627 | assert(ctx); | |
2628 | ||
04bec7b2 MS |
2629 | return mq_add_handler(ctx, rib_meta_queue_nhg_ctx_add); |
2630 | } | |
2631 | ||
2632 | /* | |
2633 | * Enqueue incoming nhg from proto daemon for processing | |
2634 | */ | |
2635 | int rib_queue_nhe_add(struct nhg_hash_entry *nhe) | |
2636 | { | |
2637 | if (nhe == NULL) | |
2638 | return -1; | |
2639 | ||
2640 | return mq_add_handler(nhe, rib_meta_queue_nhg_add); | |
2641 | } | |
2642 | ||
2643 | /* Clean up the nhg meta-queue list */ | |
2644 | static void nhg_meta_queue_free(struct list *l) | |
2645 | { | |
2646 | struct wq_nhg_wrapper *w; | |
2647 | struct listnode *node; | |
2648 | ||
2649 | /* Free the node wrapper object, and the struct it wraps */ | |
2650 | while ((node = listhead(l)) != NULL) { | |
2651 | w = node->data; | |
2652 | node->data = NULL; | |
2653 | ||
2654 | if (w->type == WQ_NHG_WRAPPER_TYPE_CTX) | |
2655 | nhg_ctx_free(&w->u.ctx); | |
2656 | else if (w->type == WQ_NHG_WRAPPER_TYPE_NHG) | |
2657 | zebra_nhg_free(w->u.nhe); | |
2658 | ||
2659 | XFREE(MTYPE_WQ_NHG_WRAPPER, w); | |
2660 | ||
2661 | list_delete_node(l, node); | |
2662 | } | |
4d38fdb4 | 2663 | } |
2664 | ||
5110a0c6 SH |
2665 | /* Create new meta queue. |
2666 | A destructor function doesn't seem to be necessary here. | |
2667 | */ | |
d62a17ae | 2668 | static struct meta_queue *meta_queue_new(void) |
e96f9203 | 2669 | { |
d62a17ae | 2670 | struct meta_queue *new; |
2671 | unsigned i; | |
5110a0c6 | 2672 | |
d62a17ae | 2673 | new = XCALLOC(MTYPE_WORK_QUEUE, sizeof(struct meta_queue)); |
e96f9203 | 2674 | |
d62a17ae | 2675 | for (i = 0; i < MQ_SIZE; i++) { |
2676 | new->subq[i] = list_new(); | |
2677 | assert(new->subq[i]); | |
2678 | } | |
5110a0c6 | 2679 | |
d62a17ae | 2680 | return new; |
e96f9203 DO |
2681 | } |
2682 | ||
d62a17ae | 2683 | void meta_queue_free(struct meta_queue *mq) |
5a8dfcd8 | 2684 | { |
d62a17ae | 2685 | unsigned i; |
5a8dfcd8 | 2686 | |
04bec7b2 MS |
2687 | for (i = 0; i < MQ_SIZE; i++) { |
2688 | /* Some subqueues may need cleanup - nhgs for example */ | |
2689 | if (i == route_info[ZEBRA_ROUTE_NHG].meta_q_map) | |
2690 | nhg_meta_queue_free(mq->subq[i]); | |
2691 | ||
6a154c88 | 2692 | list_delete(&mq->subq[i]); |
04bec7b2 | 2693 | } |
5a8dfcd8 | 2694 | |
d62a17ae | 2695 | XFREE(MTYPE_WORK_QUEUE, mq); |
5a8dfcd8 RW |
2696 | } |
2697 | ||
4d38fdb4 | 2698 | /* initialise zebra rib work queue */ |
2561d12e | 2699 | static void rib_queue_init(void) |
4d38fdb4 | 2700 | { |
489a9614 DS |
2701 | if (!(zrouter.ribq = work_queue_new(zrouter.master, |
2702 | "route_node processing"))) { | |
e914ccbe | 2703 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2704 | "%s: could not initialise work queue!", __func__); |
d62a17ae | 2705 | return; |
2706 | } | |
4d38fdb4 | 2707 | |
d62a17ae | 2708 | /* fill in the work queue spec */ |
489a9614 DS |
2709 | zrouter.ribq->spec.workfunc = &meta_queue_process; |
2710 | zrouter.ribq->spec.errorfunc = NULL; | |
46a4e345 | 2711 | zrouter.ribq->spec.completion_func = NULL; |
d62a17ae | 2712 | /* XXX: TODO: These should be runtime configurable via vty */ |
489a9614 DS |
2713 | zrouter.ribq->spec.max_retries = 3; |
2714 | zrouter.ribq->spec.hold = ZEBRA_RIB_PROCESS_HOLD_TIME; | |
2715 | zrouter.ribq->spec.retry = ZEBRA_RIB_PROCESS_RETRY_TIME; | |
d62a17ae | 2716 | |
ea45a4e7 | 2717 | if (!(zrouter.mq = meta_queue_new())) { |
e914ccbe | 2718 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2719 | "%s: could not initialise meta queue!", __func__); |
d62a17ae | 2720 | return; |
2721 | } | |
2722 | return; | |
718e3744 | 2723 | } |
2724 | ||
434434f7 DS |
2725 | rib_dest_t *zebra_rib_create_dest(struct route_node *rn) |
2726 | { | |
2727 | rib_dest_t *dest; | |
2728 | ||
2729 | dest = XCALLOC(MTYPE_RIB_DEST, sizeof(rib_dest_t)); | |
aa57abfb | 2730 | rnh_list_init(&dest->nht); |
daaeaa21 | 2731 | re_list_init(&dest->routes); |
434434f7 DS |
2732 | route_lock_node(rn); /* rn route table reference */ |
2733 | rn->info = dest; | |
2734 | dest->rnode = rn; | |
2735 | ||
2736 | return dest; | |
2737 | } | |
2738 | ||
6d691129 PJ |
2739 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2740 | * | |
2741 | * The queue length is bounded by the maximal size of the routing table, | |
2742 | * as a route_node will not be requeued, if already queued. | |
2743 | * | |
f0f77c9a DS |
2744 | * REs are submitted via rib_addnode or rib_delnode which set minimal |
2745 | * state, or static_install_route (when an existing RE is updated) | |
3c0755dc | 2746 | * and then submit route_node to queue for best-path selection later. |
f0f77c9a | 2747 | * Order of add/delete state changes are preserved for any given RE. |
6d691129 | 2748 | * |
f0f77c9a | 2749 | * Deleted REs are reaped during best-path selection. |
6d691129 PJ |
2750 | * |
2751 | * rib_addnode | |
f0f77c9a DS |
2752 | * |-> rib_link or unset ROUTE_ENTRY_REMOVE |->Update kernel with |
2753 | * |-------->| | best RE, if required | |
3c0755dc PJ |
2754 | * | | |
2755 | * static_install->|->rib_addqueue...... -> rib_process | |
2756 | * | | | |
2757 | * |-------->| |-> rib_unlink | |
f0f77c9a DS |
2758 | * |-> set ROUTE_ENTRY_REMOVE | |
2759 | * rib_delnode (RE freed) | |
6d691129 | 2760 | * |
9fd92e3c AS |
2761 | * The 'info' pointer of a route_node points to a rib_dest_t |
2762 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2763 | * dest is created on-demand by rib_link() and is kept around at least | |
2764 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
d62a17ae | 2765 | * |
6d691129 PJ |
2766 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): |
2767 | * | |
2768 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2769 | * - dest attached to route_node: |
2770 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2771 | * - route_node processing queue |
2772 | * - managed by: rib_addqueue, rib_process. | |
2773 | * | |
2774 | */ | |
d62a17ae | 2775 | |
f0f77c9a | 2776 | /* Add RE to head of the route node. */ |
d62a17ae | 2777 | static void rib_link(struct route_node *rn, struct route_entry *re, int process) |
2778 | { | |
d62a17ae | 2779 | rib_dest_t *dest; |
2780 | afi_t afi; | |
2781 | const char *rmap_name; | |
9fd92e3c | 2782 | |
d62a17ae | 2783 | assert(re && rn); |
9fd92e3c | 2784 | |
d62a17ae | 2785 | dest = rib_dest_from_rnode(rn); |
2786 | if (!dest) { | |
2787 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2788 | rnode_debug(rn, re->vrf_id, "rn %p adding dest", rn); | |
7a4bb9c5 | 2789 | |
434434f7 | 2790 | dest = zebra_rib_create_dest(rn); |
d62a17ae | 2791 | } |
2263a412 | 2792 | |
045207e2 | 2793 | re_list_add_head(&dest->routes, re); |
d62a17ae | 2794 | |
2795 | afi = (rn->p.family == AF_INET) | |
2796 | ? AFI_IP | |
2797 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
fe257ae7 DS |
2798 | if (is_zebra_import_table_enabled(afi, re->vrf_id, re->table)) { |
2799 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(re->vrf_id); | |
2800 | ||
d62a17ae | 2801 | rmap_name = zebra_get_import_table_route_map(afi, re->table); |
fe257ae7 | 2802 | zebra_add_import_table_entry(zvrf, rn, re, rmap_name); |
d62a17ae | 2803 | } else if (process) |
2804 | rib_queue_add(rn); | |
2805 | } | |
2806 | ||
7e24fdf3 DS |
2807 | static void rib_addnode(struct route_node *rn, |
2808 | struct route_entry *re, int process) | |
d62a17ae | 2809 | { |
2810 | /* RE node has been un-removed before route-node is processed. | |
2811 | * route_node must hence already be on the queue for processing.. | |
2812 | */ | |
2813 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
2814 | if (IS_ZEBRA_DEBUG_RIB) | |
2815 | rnode_debug(rn, re->vrf_id, "rn %p, un-removed re %p", | |
2816 | (void *)rn, (void *)re); | |
2817 | ||
2818 | UNSET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2819 | return; | |
2820 | } | |
2821 | rib_link(rn, re, process); | |
6d691129 PJ |
2822 | } |
2823 | ||
9fd92e3c AS |
2824 | /* |
2825 | * rib_unlink | |
2826 | * | |
2827 | * Detach a rib structure from a route_node. | |
2828 | * | |
2829 | * Note that a call to rib_unlink() should be followed by a call to | |
2830 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2831 | * longer required to be deleted. | |
2832 | */ | |
d62a17ae | 2833 | void rib_unlink(struct route_node *rn, struct route_entry *re) |
6d691129 | 2834 | { |
d62a17ae | 2835 | rib_dest_t *dest; |
9fd92e3c | 2836 | |
d62a17ae | 2837 | assert(rn && re); |
6d691129 | 2838 | |
d62a17ae | 2839 | if (IS_ZEBRA_DEBUG_RIB) |
2840 | rnode_debug(rn, re->vrf_id, "rn %p, re %p", (void *)rn, | |
2841 | (void *)re); | |
6d691129 | 2842 | |
d62a17ae | 2843 | dest = rib_dest_from_rnode(rn); |
6d691129 | 2844 | |
045207e2 | 2845 | re_list_del(&dest->routes, re); |
7a4bb9c5 | 2846 | |
2eb07de3 DS |
2847 | if (dest->selected_fib == re) |
2848 | dest->selected_fib = NULL; | |
2849 | ||
1d48702e MS |
2850 | if (re->nhe && re->nhe_id) { |
2851 | assert(re->nhe->id == re->nhe_id); | |
2852 | zebra_nhg_decrement_ref(re->nhe); | |
2853 | } else if (re->nhe && re->nhe->nhg.nexthop) | |
c415d895 | 2854 | nexthops_free(re->nhe->nhg.nexthop); |
22bcedb2 | 2855 | |
ee5e8a48 MS |
2856 | nexthops_free(re->fib_ng.nexthop); |
2857 | ||
224ccf29 | 2858 | zapi_opaque_free(re->opaque); |
a29a6001 | 2859 | |
d62a17ae | 2860 | XFREE(MTYPE_RE, re); |
2861 | } | |
2862 | ||
2863 | void rib_delnode(struct route_node *rn, struct route_entry *re) | |
2864 | { | |
2865 | afi_t afi; | |
2866 | ||
2867 | if (IS_ZEBRA_DEBUG_RIB) | |
2868 | rnode_debug(rn, re->vrf_id, "rn %p, re %p, removing", | |
2869 | (void *)rn, (void *)re); | |
2870 | SET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2871 | ||
2872 | afi = (rn->p.family == AF_INET) | |
2873 | ? AFI_IP | |
2874 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
fe257ae7 DS |
2875 | if (is_zebra_import_table_enabled(afi, re->vrf_id, re->table)) { |
2876 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(re->vrf_id); | |
2877 | ||
2878 | zebra_del_import_table_entry(zvrf, rn, re); | |
d62a17ae | 2879 | /* Just clean up if non main table */ |
2880 | if (IS_ZEBRA_DEBUG_RIB) { | |
2881 | char buf[SRCDEST2STR_BUFFER]; | |
2882 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bd47f3a3 JU |
2883 | zlog_debug("%s(%u):%s: Freeing route rn %p, re %p (%s)", |
2884 | vrf_id_to_name(re->vrf_id), re->vrf_id, buf, | |
2885 | rn, re, zebra_route_string(re->type)); | |
d62a17ae | 2886 | } |
7a4bb9c5 | 2887 | |
d62a17ae | 2888 | rib_unlink(rn, re); |
2889 | } else { | |
2890 | rib_queue_add(rn); | |
2891 | } | |
718e3744 | 2892 | } |
2893 | ||
6d81b590 MS |
2894 | /* |
2895 | * Helper that debugs a single nexthop within a route-entry | |
2896 | */ | |
2897 | static void _route_entry_dump_nh(const struct route_entry *re, | |
2898 | const char *straddr, | |
2899 | const struct nexthop *nexthop) | |
2900 | { | |
2901 | char nhname[PREFIX_STRLEN]; | |
2902 | char backup_str[50]; | |
2903 | char wgt_str[50]; | |
474aebd9 | 2904 | char temp_str[10]; |
cbe5bafb | 2905 | char label_str[MPLS_LABEL_STRLEN]; |
474aebd9 | 2906 | int i; |
6d81b590 MS |
2907 | struct interface *ifp; |
2908 | struct vrf *vrf = vrf_lookup_by_id(nexthop->vrf_id); | |
2909 | ||
2910 | switch (nexthop->type) { | |
2911 | case NEXTHOP_TYPE_BLACKHOLE: | |
772270f3 | 2912 | snprintf(nhname, sizeof(nhname), "Blackhole"); |
6d81b590 MS |
2913 | break; |
2914 | case NEXTHOP_TYPE_IFINDEX: | |
2915 | ifp = if_lookup_by_index(nexthop->ifindex, nexthop->vrf_id); | |
772270f3 QY |
2916 | snprintf(nhname, sizeof(nhname), "%s", |
2917 | ifp ? ifp->name : "Unknown"); | |
6d81b590 MS |
2918 | break; |
2919 | case NEXTHOP_TYPE_IPV4: | |
2920 | /* fallthrough */ | |
2921 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
2922 | inet_ntop(AF_INET, &nexthop->gate, nhname, INET6_ADDRSTRLEN); | |
2923 | break; | |
2924 | case NEXTHOP_TYPE_IPV6: | |
2925 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
2926 | inet_ntop(AF_INET6, &nexthop->gate, nhname, INET6_ADDRSTRLEN); | |
2927 | break; | |
2928 | } | |
2929 | ||
cbe5bafb MS |
2930 | /* Label stack */ |
2931 | label_str[0] = '\0'; | |
2932 | if (nexthop->nh_label && nexthop->nh_label->num_labels > 0) { | |
2933 | mpls_label2str(nexthop->nh_label->num_labels, | |
2934 | nexthop->nh_label->label, label_str, | |
2935 | sizeof(label_str), 0 /*pretty*/); | |
2936 | strlcat(label_str, ", ", sizeof(label_str)); | |
2937 | } | |
2938 | ||
6d81b590 MS |
2939 | backup_str[0] = '\0'; |
2940 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP)) { | |
474aebd9 MS |
2941 | snprintf(backup_str, sizeof(backup_str), "backup "); |
2942 | for (i = 0; i < nexthop->backup_num; i++) { | |
2943 | snprintf(temp_str, sizeof(temp_str), "%d, ", | |
2944 | nexthop->backup_idx[i]); | |
2945 | strlcat(backup_str, temp_str, sizeof(backup_str)); | |
2946 | } | |
6d81b590 MS |
2947 | } |
2948 | ||
2949 | wgt_str[0] = '\0'; | |
2950 | if (nexthop->weight) | |
2951 | snprintf(wgt_str, sizeof(wgt_str), "wgt %d,", nexthop->weight); | |
2952 | ||
cbe5bafb | 2953 | zlog_debug("%s: %s %s[%u] %svrf %s(%u) %s%s with flags %s%s%s%s%s%s%s%s", |
6d81b590 | 2954 | straddr, (nexthop->rparent ? " NH" : "NH"), nhname, |
cbe5bafb | 2955 | nexthop->ifindex, label_str, vrf ? vrf->name : "Unknown", |
6d81b590 MS |
2956 | nexthop->vrf_id, |
2957 | wgt_str, backup_str, | |
2958 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE) | |
2959 | ? "ACTIVE " | |
2960 | : ""), | |
2961 | (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED) | |
2962 | ? "FIB " | |
2963 | : ""), | |
2964 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE) | |
2965 | ? "RECURSIVE " | |
2966 | : ""), | |
2967 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK) | |
2968 | ? "ONLINK " | |
2969 | : ""), | |
2970 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_DUPLICATE) | |
2971 | ? "DUPLICATE " | |
aab4eca1 DS |
2972 | : ""), |
2973 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RNH_FILTERED) | |
2974 | ? "FILTERED " : ""), | |
2975 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP) | |
2976 | ? "BACKUP " : ""), | |
2977 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_SRTE) | |
2978 | ? "SRTE " : "")); | |
6d81b590 MS |
2979 | |
2980 | } | |
2981 | ||
f0f77c9a | 2982 | /* This function dumps the contents of a given RE entry into |
dc95824a DO |
2983 | * standard debug log. Calling function name and IP prefix in |
2984 | * question are passed as 1st and 2nd arguments. | |
2985 | */ | |
d62a17ae | 2986 | void _route_entry_dump(const char *func, union prefixconstptr pp, |
2987 | union prefixconstptr src_pp, | |
2988 | const struct route_entry *re) | |
2989 | { | |
d62a17ae | 2990 | const struct prefix *src_p = src_pp.p; |
2991 | bool is_srcdst = src_p && src_p->prefixlen; | |
2992 | char straddr[PREFIX_STRLEN]; | |
2993 | char srcaddr[PREFIX_STRLEN]; | |
61e6de9d DS |
2994 | char flags_buf[128]; |
2995 | char status_buf[128]; | |
d62a17ae | 2996 | struct nexthop *nexthop; |
c479e756 | 2997 | struct vrf *vrf = vrf_lookup_by_id(re->vrf_id); |
6d81b590 | 2998 | struct nexthop_group *nhg; |
d62a17ae | 2999 | |
5d27875b DL |
3000 | prefix2str(pp, straddr, sizeof(straddr)); |
3001 | ||
c479e756 | 3002 | zlog_debug("%s: dumping RE entry %p for %s%s%s vrf %s(%u)", func, |
5d27875b | 3003 | (const void *)re, straddr, |
d62a17ae | 3004 | is_srcdst ? " from " : "", |
3005 | is_srcdst ? prefix2str(src_pp, srcaddr, sizeof(srcaddr)) | |
3006 | : "", | |
c479e756 | 3007 | VRF_LOGNAME(vrf), re->vrf_id); |
cc54cfee | 3008 | zlog_debug("%s: uptime == %lu, type == %u, instance == %d, table == %d", |
53c16fbe | 3009 | straddr, (unsigned long)re->uptime, re->type, re->instance, |
cc54cfee | 3010 | re->table); |
61e6de9d DS |
3011 | zlog_debug( |
3012 | "%s: metric == %u, mtu == %u, distance == %u, flags == %sstatus == %s", | |
3013 | straddr, re->metric, re->mtu, re->distance, | |
3014 | zclient_dump_route_flags(re->flags, flags_buf, | |
3015 | sizeof(flags_buf)), | |
3016 | _dump_re_status(re, status_buf, sizeof(status_buf))); | |
53c16fbe | 3017 | zlog_debug("%s: nexthop_num == %u, nexthop_active_num == %u", straddr, |
c415d895 MS |
3018 | nexthop_group_nexthop_num(&(re->nhe->nhg)), |
3019 | nexthop_group_active_nexthop_num(&(re->nhe->nhg))); | |
d62a17ae | 3020 | |
6d81b590 MS |
3021 | /* Dump nexthops */ |
3022 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) | |
3023 | _route_entry_dump_nh(re, straddr, nexthop); | |
2d68a0f2 | 3024 | |
6d81b590 MS |
3025 | if (zebra_nhg_get_backup_nhg(re->nhe)) { |
3026 | zlog_debug("%s: backup nexthops:", straddr); | |
3027 | ||
3028 | nhg = zebra_nhg_get_backup_nhg(re->nhe); | |
3029 | for (ALL_NEXTHOPS_PTR(nhg, nexthop)) | |
3030 | _route_entry_dump_nh(re, straddr, nexthop); | |
d62a17ae | 3031 | } |
6d81b590 | 3032 | |
53c16fbe | 3033 | zlog_debug("%s: dump complete", straddr); |
dc95824a DO |
3034 | } |
3035 | ||
6d81b590 MS |
3036 | /* |
3037 | * This is an exported helper to rtm_read() to dump the strange | |
f0f77c9a | 3038 | * RE entry found by rib_lookup_ipv4_route() |
dc95824a | 3039 | */ |
d62a17ae | 3040 | void rib_lookup_and_dump(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
3041 | { | |
3042 | struct route_table *table; | |
3043 | struct route_node *rn; | |
3044 | struct route_entry *re; | |
bd47f3a3 | 3045 | struct vrf *vrf; |
d62a17ae | 3046 | |
bd47f3a3 JU |
3047 | vrf = vrf_lookup_by_id(vrf_id); |
3048 | ||
d62a17ae | 3049 | /* Lookup table. */ |
3050 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
3051 | if (!table) { | |
e914ccbe | 3052 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
bd47f3a3 JU |
3053 | "%s:%s(%u) zebra_vrf_table() returned NULL", __func__, |
3054 | VRF_LOGNAME(vrf), vrf_id); | |
d62a17ae | 3055 | return; |
3056 | } | |
3057 | ||
3058 | /* Scan the RIB table for exactly matching RE entry. */ | |
3059 | rn = route_node_lookup(table, (struct prefix *)p); | |
3060 | ||
3061 | /* No route for this prefix. */ | |
3062 | if (!rn) { | |
2dbe669b DA |
3063 | zlog_debug("%s:%s(%u) lookup failed for %pFX", __func__, |
3064 | VRF_LOGNAME(vrf), vrf_id, (struct prefix *)p); | |
d62a17ae | 3065 | return; |
3066 | } | |
3067 | ||
3068 | /* Unlock node. */ | |
3069 | route_unlock_node(rn); | |
3070 | ||
3071 | /* let's go */ | |
a2addae8 | 3072 | RNODE_FOREACH_RE (rn, re) { |
bd47f3a3 JU |
3073 | zlog_debug("%s:%s(%u) rn %p, re %p: %s, %s", __func__, |
3074 | VRF_LOGNAME(vrf), vrf_id, (void *)rn, (void *)re, | |
d62a17ae | 3075 | (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED) |
3076 | ? "removed" | |
3077 | : "NOT removed"), | |
3078 | (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED) | |
3079 | ? "selected" | |
3080 | : "NOT selected")); | |
3081 | route_entry_dump(p, NULL, re); | |
3082 | } | |
dc95824a DO |
3083 | } |
3084 | ||
20e5ff0a DO |
3085 | /* Check if requested address assignment will fail due to another |
3086 | * route being installed by zebra in FIB already. Take necessary | |
3087 | * actions, if needed: remove such a route from FIB and deSELECT | |
f0f77c9a | 3088 | * corresponding RE entry. Then put affected RN into RIBQ head. |
20e5ff0a | 3089 | */ |
d62a17ae | 3090 | void rib_lookup_and_pushup(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
3091 | { | |
3092 | struct route_table *table; | |
3093 | struct route_node *rn; | |
5f7a4718 | 3094 | rib_dest_t *dest; |
d62a17ae | 3095 | |
3096 | if (NULL == (table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id))) { | |
bd47f3a3 JU |
3097 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); |
3098 | ||
e914ccbe | 3099 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
bd47f3a3 JU |
3100 | "%s:%s(%u) zebra_vrf_table() returned NULL", __func__, |
3101 | VRF_LOGNAME(vrf), vrf_id); | |
d62a17ae | 3102 | return; |
3103 | } | |
3104 | ||
3105 | /* No matches would be the simplest case. */ | |
3106 | if (NULL == (rn = route_node_lookup(table, (struct prefix *)p))) | |
3107 | return; | |
3108 | ||
3109 | /* Unlock node. */ | |
3110 | route_unlock_node(rn); | |
3111 | ||
5f7a4718 | 3112 | dest = rib_dest_from_rnode(rn); |
d62a17ae | 3113 | /* Check all RE entries. In case any changes have to be done, requeue |
3114 | * the RN into RIBQ head. If the routing message about the new connected | |
3115 | * route (generated by the IP address we are going to assign very soon) | |
3116 | * comes before the RIBQ is processed, the new RE entry will join | |
3117 | * RIBQ record already on head. This is necessary for proper | |
3118 | * revalidation | |
3119 | * of the rest of the RE. | |
3120 | */ | |
3cdba47a | 3121 | if (dest->selected_fib) { |
5f7a4718 | 3122 | if (IS_ZEBRA_DEBUG_RIB) { |
bd47f3a3 JU |
3123 | struct vrf *vrf = |
3124 | vrf_lookup_by_id(dest->selected_fib->vrf_id); | |
5f7a4718 | 3125 | |
bd47f3a3 | 3126 | zlog_debug( |
2dbe669b | 3127 | "%s(%u):%pFX: freeing way for connected prefix", |
bd47f3a3 | 3128 | VRF_LOGNAME(vrf), dest->selected_fib->vrf_id, |
2dbe669b | 3129 | &rn->p); |
5f7a4718 | 3130 | route_entry_dump(&rn->p, NULL, dest->selected_fib); |
d62a17ae | 3131 | } |
5f7a4718 | 3132 | rib_uninstall(rn, dest->selected_fib); |
d62a17ae | 3133 | rib_queue_add(rn); |
ade4a886 | 3134 | } |
20e5ff0a DO |
3135 | } |
3136 | ||
1d48702e MS |
3137 | /* |
3138 | * Internal route-add implementation; there are a couple of different public | |
3139 | * signatures. Callers in this path are responsible for the memory they | |
3140 | * allocate: if they allocate a nexthop_group or backup nexthop info, they | |
3141 | * must free those objects. If this returns < 0, an error has occurred and the | |
3142 | * route_entry 're' has not been captured; the caller should free that also. | |
3143 | */ | |
3144 | int rib_add_multipath_nhe(afi_t afi, safi_t safi, struct prefix *p, | |
6d81b590 | 3145 | struct prefix_ipv6 *src_p, struct route_entry *re, |
1d48702e | 3146 | struct nhg_hash_entry *re_nhe) |
718e3744 | 3147 | { |
98cda54a | 3148 | struct nhg_hash_entry *nhe = NULL; |
d62a17ae | 3149 | struct route_table *table; |
3150 | struct route_node *rn; | |
0ca6f3b1 | 3151 | struct route_entry *same = NULL, *first_same = NULL; |
d62a17ae | 3152 | int ret = 0; |
0ca6f3b1 MS |
3153 | int same_count = 0; |
3154 | rib_dest_t *dest; | |
b4c034b0 | 3155 | |
1d48702e MS |
3156 | if (!re || !re_nhe) |
3157 | return -1; | |
b4c034b0 | 3158 | |
1f610a1f | 3159 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
05737783 | 3160 | |
d62a17ae | 3161 | /* Lookup table. */ |
c7c0b007 SW |
3162 | table = zebra_vrf_get_table_with_table_id(afi, safi, re->vrf_id, |
3163 | re->table); | |
1d48702e MS |
3164 | if (!table) |
3165 | return -1; | |
cddf391b | 3166 | |
50db3f2f SW |
3167 | if (re->nhe_id > 0) { |
3168 | nhe = zebra_nhg_lookup_id(re->nhe_id); | |
98cda54a SW |
3169 | |
3170 | if (!nhe) { | |
3171 | flog_err( | |
3172 | EC_ZEBRA_TABLE_LOOKUP_FAILED, | |
3173 | "Zebra failed to find the nexthop hash entry for id=%u in a route entry", | |
50db3f2f | 3174 | re->nhe_id); |
1d48702e | 3175 | |
98cda54a SW |
3176 | return -1; |
3177 | } | |
3178 | } else { | |
377e29f7 MS |
3179 | /* Lookup nhe from route information */ |
3180 | nhe = zebra_nhg_rib_find_nhe(re_nhe, afi); | |
98cda54a | 3181 | if (!nhe) { |
98cda54a SW |
3182 | char buf2[PREFIX_STRLEN] = ""; |
3183 | ||
3184 | flog_err( | |
3185 | EC_ZEBRA_TABLE_LOOKUP_FAILED, | |
2dbe669b DA |
3186 | "Zebra failed to find or create a nexthop hash entry for %pFX%s%s", |
3187 | p, src_p ? " from " : "", | |
98cda54a SW |
3188 | src_p ? prefix2str(src_p, buf2, sizeof(buf2)) |
3189 | : ""); | |
3190 | ||
98cda54a SW |
3191 | return -1; |
3192 | } | |
98cda54a SW |
3193 | } |
3194 | ||
4b87c90d SW |
3195 | /* |
3196 | * Attach the re to the nhe's nexthop group. | |
3197 | * | |
3198 | * TODO: This will need to change when we start getting IDs from upper | |
3199 | * level protocols, as the refcnt might be wrong, since it checks | |
3200 | * if old_id != new_id. | |
3201 | */ | |
5463ce26 | 3202 | route_entry_update_nhe(re, nhe); |
98cda54a | 3203 | |
d62a17ae | 3204 | /* Make it sure prefixlen is applied to the prefix. */ |
3205 | apply_mask(p); | |
3206 | if (src_p) | |
3207 | apply_mask_ipv6(src_p); | |
718e3744 | 3208 | |
d62a17ae | 3209 | /* Set default distance by route type. */ |
eea2ef07 | 3210 | if (re->distance == 0) |
0492eea0 | 3211 | re->distance = route_distance(re->type); |
718e3744 | 3212 | |
d62a17ae | 3213 | /* Lookup route node.*/ |
3214 | rn = srcdest_rnode_get(table, p, src_p); | |
718e3744 | 3215 | |
40ecd8e4 DS |
3216 | /* |
3217 | * If same type of route are installed, treat it as a implicit | |
9db35a5e | 3218 | * withdraw. If the user has specified the No route replace semantics |
40ecd8e4 DS |
3219 | * for the install don't do a route replace. |
3220 | */ | |
a2addae8 | 3221 | RNODE_FOREACH_RE (rn, same) { |
0ca6f3b1 MS |
3222 | if (CHECK_FLAG(same->status, ROUTE_ENTRY_REMOVED)) { |
3223 | same_count++; | |
d62a17ae | 3224 | continue; |
0ca6f3b1 | 3225 | } |
41ec9222 | 3226 | |
9db35a5e | 3227 | /* Compare various route_entry properties */ |
0ca6f3b1 MS |
3228 | if (rib_compare_routes(re, same)) { |
3229 | same_count++; | |
3230 | ||
3231 | if (first_same == NULL) | |
3232 | first_same = same; | |
3233 | } | |
d62a17ae | 3234 | } |
718e3744 | 3235 | |
0ca6f3b1 MS |
3236 | same = first_same; |
3237 | ||
cf363e1b MS |
3238 | /* If this route is kernel/connected route, notify the dataplane. */ |
3239 | if (RIB_SYSTEM_ROUTE(re)) { | |
3240 | /* Notify dataplane */ | |
3241 | dplane_sys_route_add(rn, re); | |
3242 | } | |
3243 | ||
d62a17ae | 3244 | /* Link new re to node.*/ |
3245 | if (IS_ZEBRA_DEBUG_RIB) { | |
2da33d6b | 3246 | rnode_debug(rn, re->vrf_id, |
0ca6f3b1 MS |
3247 | "Inserting route rn %p, re %p (%s) existing %p, same_count %d", |
3248 | rn, re, zebra_route_string(re->type), same, | |
3249 | same_count); | |
718e3744 | 3250 | |
d62a17ae | 3251 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
3252 | route_entry_dump(p, src_p, re); | |
718e3744 | 3253 | } |
6883bf8d DS |
3254 | |
3255 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
d62a17ae | 3256 | rib_addnode(rn, re, 1); |
3257 | ret = 1; | |
6b0655a2 | 3258 | |
d62a17ae | 3259 | /* Free implicit route.*/ |
1d48702e | 3260 | if (same) |
d62a17ae | 3261 | rib_delnode(rn, same); |
718e3744 | 3262 | |
0ca6f3b1 MS |
3263 | /* See if we can remove some RE entries that are queued for |
3264 | * removal, but won't be considered in rib processing. | |
3265 | */ | |
3266 | dest = rib_dest_from_rnode(rn); | |
3267 | RNODE_FOREACH_RE_SAFE (rn, re, same) { | |
3268 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
3269 | /* If the route was used earlier, must retain it. */ | |
3270 | if (dest && re == dest->selected_fib) | |
3271 | continue; | |
3272 | ||
3273 | if (IS_ZEBRA_DEBUG_RIB) | |
3274 | rnode_debug(rn, re->vrf_id, "rn %p, removing unneeded re %p", | |
3275 | rn, re); | |
3276 | ||
3277 | rib_unlink(rn, re); | |
3278 | } | |
3279 | } | |
3280 | ||
d62a17ae | 3281 | route_unlock_node(rn); |
3282 | return ret; | |
3283 | } | |
3284 | ||
1d48702e MS |
3285 | /* |
3286 | * Add a single route. | |
3287 | */ | |
3288 | int rib_add_multipath(afi_t afi, safi_t safi, struct prefix *p, | |
3289 | struct prefix_ipv6 *src_p, struct route_entry *re, | |
3290 | struct nexthop_group *ng) | |
3291 | { | |
3292 | int ret; | |
377e29f7 | 3293 | struct nhg_hash_entry nhe; |
1d48702e MS |
3294 | |
3295 | if (!re) | |
3296 | return -1; | |
3297 | ||
3298 | /* We either need nexthop(s) or an existing nexthop id */ | |
3299 | if (ng == NULL && re->nhe_id == 0) | |
3300 | return -1; | |
3301 | ||
3302 | /* | |
3303 | * Use a temporary nhe to convey info to the common/main api. | |
3304 | */ | |
377e29f7 | 3305 | zebra_nhe_init(&nhe, afi, (ng ? ng->nexthop : NULL)); |
1d48702e MS |
3306 | if (ng) |
3307 | nhe.nhg.nexthop = ng->nexthop; | |
3308 | else if (re->nhe_id > 0) | |
3309 | nhe.id = re->nhe_id; | |
3310 | ||
3311 | ret = rib_add_multipath_nhe(afi, safi, p, src_p, re, &nhe); | |
3312 | ||
3313 | /* In this path, the callers expect memory to be freed. */ | |
3314 | nexthop_group_delete(&ng); | |
3315 | ||
3316 | /* In error cases, free the route also */ | |
3317 | if (ret < 0) | |
3318 | XFREE(MTYPE_RE, re); | |
3319 | ||
3320 | return ret; | |
3321 | } | |
3322 | ||
d62a17ae | 3323 | void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
acde7f6b | 3324 | unsigned short instance, uint32_t flags, struct prefix *p, |
fd36be7e | 3325 | struct prefix_ipv6 *src_p, const struct nexthop *nh, |
bc541126 | 3326 | uint32_t nhe_id, uint32_t table_id, uint32_t metric, |
3ceae22b | 3327 | uint8_t distance, bool fromkernel) |
d62a17ae | 3328 | { |
3329 | struct route_table *table; | |
3330 | struct route_node *rn; | |
3331 | struct route_entry *re; | |
3332 | struct route_entry *fib = NULL; | |
3333 | struct route_entry *same = NULL; | |
fd36be7e | 3334 | struct nexthop *rtnh; |
d62a17ae | 3335 | char buf2[INET6_ADDRSTRLEN]; |
5f7a4718 | 3336 | rib_dest_t *dest; |
d62a17ae | 3337 | |
1f610a1f | 3338 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
d62a17ae | 3339 | |
3340 | /* Lookup table. */ | |
c7c0b007 SW |
3341 | table = zebra_vrf_lookup_table_with_table_id(afi, safi, vrf_id, |
3342 | table_id); | |
d62a17ae | 3343 | if (!table) |
3344 | return; | |
3345 | ||
3346 | /* Apply mask. */ | |
3347 | apply_mask(p); | |
3348 | if (src_p) | |
3349 | apply_mask_ipv6(src_p); | |
3350 | ||
3351 | /* Lookup route node. */ | |
3352 | rn = srcdest_rnode_lookup(table, p, src_p); | |
3353 | if (!rn) { | |
82d7d0e2 | 3354 | if (IS_ZEBRA_DEBUG_RIB) { |
82144f53 | 3355 | char src_buf[PREFIX_STRLEN]; |
82d7d0e2 DS |
3356 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); |
3357 | ||
82144f53 DS |
3358 | if (src_p && src_p->prefixlen) |
3359 | prefix2str(src_p, src_buf, sizeof(src_buf)); | |
3360 | else | |
3361 | src_buf[0] = '\0'; | |
3362 | ||
2dbe669b DA |
3363 | zlog_debug("%s[%d]:%pFX%s%s doesn't exist in rib", |
3364 | vrf->name, table_id, p, | |
d62a17ae | 3365 | (src_buf[0] != '\0') ? " from " : "", |
3366 | src_buf); | |
82d7d0e2 | 3367 | } |
d62a17ae | 3368 | return; |
3369 | } | |
718e3744 | 3370 | |
5f7a4718 DS |
3371 | dest = rib_dest_from_rnode(rn); |
3372 | fib = dest->selected_fib; | |
3373 | ||
d62a17ae | 3374 | /* Lookup same type route. */ |
a2addae8 | 3375 | RNODE_FOREACH_RE (rn, re) { |
d62a17ae | 3376 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
3377 | continue; | |
3378 | ||
d62a17ae | 3379 | if (re->type != type) |
3380 | continue; | |
3381 | if (re->instance != instance) | |
3382 | continue; | |
40ecd8e4 DS |
3383 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_RR_USE_DISTANCE) && |
3384 | distance != re->distance) | |
3385 | continue; | |
3386 | ||
996c9314 | 3387 | if (re->type == ZEBRA_ROUTE_KERNEL && re->metric != metric) |
f19435a8 | 3388 | continue; |
0eb97b86 | 3389 | if (re->type == ZEBRA_ROUTE_CONNECT && |
c415d895 | 3390 | (rtnh = re->nhe->nhg.nexthop) |
fd36be7e DL |
3391 | && rtnh->type == NEXTHOP_TYPE_IFINDEX && nh) { |
3392 | if (rtnh->ifindex != nh->ifindex) | |
d62a17ae | 3393 | continue; |
d62a17ae | 3394 | same = re; |
3395 | break; | |
3396 | } | |
fec211ad | 3397 | |
d62a17ae | 3398 | /* Make sure that the route found has the same gateway. */ |
fec211ad | 3399 | if (nhe_id && re->nhe_id == nhe_id) { |
bc541126 SW |
3400 | same = re; |
3401 | break; | |
fec211ad SW |
3402 | } |
3403 | ||
3404 | if (nh == NULL) { | |
3405 | same = re; | |
3406 | break; | |
3407 | } | |
c415d895 | 3408 | for (ALL_NEXTHOPS(re->nhe->nhg, rtnh)) { |
fec211ad SW |
3409 | /* |
3410 | * No guarantee all kernel send nh with labels | |
3411 | * on delete. | |
3412 | */ | |
3413 | if (nexthop_same_no_labels(rtnh, nh)) { | |
d62a17ae | 3414 | same = re; |
3415 | break; | |
3416 | } | |
d62a17ae | 3417 | } |
fec211ad SW |
3418 | |
3419 | if (same) | |
3420 | break; | |
d62a17ae | 3421 | } |
3422 | /* If same type of route can't be found and this message is from | |
3423 | kernel. */ | |
3424 | if (!same) { | |
5dfeba19 DS |
3425 | /* |
3426 | * In the past(HA!) we could get here because | |
3427 | * we were receiving a route delete from the | |
3428 | * kernel and we're not marking the proto | |
3429 | * as coming from it's appropriate originator. | |
3430 | * Now that we are properly noticing the fact | |
3431 | * that the kernel has deleted our route we | |
3432 | * are not going to get called in this path | |
3433 | * I am going to leave this here because | |
3434 | * this might still work this way on non-linux | |
3435 | * platforms as well as some weird state I have | |
3436 | * not properly thought of yet. | |
3437 | * If we can show that this code path is | |
3438 | * dead then we can remove it. | |
3439 | */ | |
b8faa875 | 3440 | if (fib && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) { |
d62a17ae | 3441 | if (IS_ZEBRA_DEBUG_RIB) { |
2da33d6b DS |
3442 | rnode_debug(rn, vrf_id, |
3443 | "rn %p, re %p (%s) was deleted from kernel, adding", | |
3444 | rn, fib, | |
3445 | zebra_route_string(fib->type)); | |
d62a17ae | 3446 | } |
9271987f DS |
3447 | if (allow_delete |
3448 | || CHECK_FLAG(dest->flags, RIB_ROUTE_ANY_QUEUED)) { | |
677c1dd5 | 3449 | UNSET_FLAG(fib->status, ROUTE_ENTRY_INSTALLED); |
d62a17ae | 3450 | /* Unset flags. */ |
c415d895 | 3451 | for (rtnh = fib->nhe->nhg.nexthop; rtnh; |
fd36be7e DL |
3452 | rtnh = rtnh->next) |
3453 | UNSET_FLAG(rtnh->flags, | |
d62a17ae | 3454 | NEXTHOP_FLAG_FIB); |
3455 | ||
ed216282 DS |
3456 | /* |
3457 | * This is a non FRR route | |
3458 | * as such we should mark | |
3459 | * it as deleted | |
3460 | */ | |
5f7a4718 | 3461 | dest->selected_fib = NULL; |
d62a17ae | 3462 | } else { |
3463 | /* This means someone else, other than Zebra, | |
3464 | * has deleted | |
3465 | * a Zebra router from the kernel. We will add | |
3466 | * it back */ | |
3467 | rib_install_kernel(rn, fib, NULL); | |
3468 | } | |
3469 | } else { | |
3470 | if (IS_ZEBRA_DEBUG_RIB) { | |
fd36be7e | 3471 | if (nh) |
d62a17ae | 3472 | rnode_debug( |
3473 | rn, vrf_id, | |
3efd0893 | 3474 | "via %s ifindex %d type %d doesn't exist in rib", |
36228974 | 3475 | inet_ntop(afi2family(afi), |
3476 | &nh->gate, buf2, | |
3477 | sizeof(buf2)), | |
3478 | nh->ifindex, type); | |
d62a17ae | 3479 | else |
3480 | rnode_debug( | |
3481 | rn, vrf_id, | |
fd36be7e DL |
3482 | "type %d doesn't exist in rib", |
3483 | type); | |
d62a17ae | 3484 | } |
3485 | route_unlock_node(rn); | |
3486 | return; | |
3487 | } | |
3488 | } | |
718e3744 | 3489 | |
5dfeba19 | 3490 | if (same) { |
996c9314 LB |
3491 | if (fromkernel && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE) |
3492 | && !allow_delete) { | |
5dfeba19 DS |
3493 | rib_install_kernel(rn, same, NULL); |
3494 | route_unlock_node(rn); | |
3495 | ||
3496 | return; | |
3497 | } | |
6134fd82 | 3498 | |
2b83602b | 3499 | /* Special handling for IPv4 or IPv6 routes sourced from |
3500 | * EVPN - the nexthop (and associated MAC) need to be | |
3501 | * uninstalled if no more refs. | |
3502 | */ | |
90264d64 | 3503 | if (CHECK_FLAG(flags, ZEBRA_FLAG_EVPN_ROUTE)) { |
6134fd82 | 3504 | struct nexthop *tmp_nh; |
3505 | ||
c415d895 | 3506 | for (ALL_NEXTHOPS(re->nhe->nhg, tmp_nh)) { |
6134fd82 | 3507 | struct ipaddr vtep_ip; |
3508 | ||
3509 | memset(&vtep_ip, 0, sizeof(struct ipaddr)); | |
1ec31309 | 3510 | if (afi == AFI_IP) { |
3511 | vtep_ip.ipa_type = IPADDR_V4; | |
3512 | memcpy(&(vtep_ip.ipaddr_v4), | |
3513 | &(tmp_nh->gate.ipv4), | |
3514 | sizeof(struct in_addr)); | |
3515 | } else { | |
3516 | vtep_ip.ipa_type = IPADDR_V6; | |
3517 | memcpy(&(vtep_ip.ipaddr_v6), | |
3518 | &(tmp_nh->gate.ipv6), | |
3519 | sizeof(struct in6_addr)); | |
3520 | } | |
a317a9b9 | 3521 | zebra_vxlan_evpn_vrf_route_del(re->vrf_id, |
6134fd82 | 3522 | &vtep_ip, p); |
3523 | } | |
3524 | } | |
cf363e1b MS |
3525 | |
3526 | /* Notify dplane if system route changes */ | |
3527 | if (RIB_SYSTEM_ROUTE(re)) | |
3528 | dplane_sys_route_del(rn, same); | |
3529 | ||
d62a17ae | 3530 | rib_delnode(rn, same); |
5dfeba19 | 3531 | } |
05737783 | 3532 | |
d62a17ae | 3533 | route_unlock_node(rn); |
3534 | return; | |
3535 | } | |
718e3744 | 3536 | |
718e3744 | 3537 | |
d7c0a89a | 3538 | int rib_add(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
acde7f6b | 3539 | unsigned short instance, uint32_t flags, struct prefix *p, |
d7c0a89a | 3540 | struct prefix_ipv6 *src_p, const struct nexthop *nh, |
8032b717 SW |
3541 | uint32_t nhe_id, uint32_t table_id, uint32_t metric, uint32_t mtu, |
3542 | uint8_t distance, route_tag_t tag) | |
d62a17ae | 3543 | { |
bbb322f2 SW |
3544 | struct route_entry *re = NULL; |
3545 | struct nexthop *nexthop = NULL; | |
0eb97b86 | 3546 | struct nexthop_group *ng = NULL; |
718e3744 | 3547 | |
66af6845 | 3548 | /* Allocate new route_entry structure. */ |
d62a17ae | 3549 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); |
d62a17ae | 3550 | re->type = type; |
3551 | re->instance = instance; | |
3552 | re->distance = distance; | |
3553 | re->flags = flags; | |
3554 | re->metric = metric; | |
3555 | re->mtu = mtu; | |
3556 | re->table = table_id; | |
3557 | re->vrf_id = vrf_id; | |
98572489 | 3558 | re->uptime = monotime(NULL); |
4e40b6d6 | 3559 | re->tag = tag; |
bbb322f2 SW |
3560 | re->nhe_id = nhe_id; |
3561 | ||
0eb97b86 MS |
3562 | /* If the owner of the route supplies a shared nexthop-group id, |
3563 | * we'll use that. Otherwise, pass the nexthop along directly. | |
3564 | */ | |
e22e8001 | 3565 | if (!nhe_id) { |
0eb97b86 | 3566 | ng = nexthop_group_new(); |
d62a17ae | 3567 | |
e22e8001 SW |
3568 | /* Add nexthop. */ |
3569 | nexthop = nexthop_new(); | |
3570 | *nexthop = *nh; | |
0eb97b86 | 3571 | nexthop_group_add_sorted(ng, nexthop); |
e22e8001 | 3572 | } |
718e3744 | 3573 | |
0eb97b86 | 3574 | return rib_add_multipath(afi, safi, p, src_p, re, ng); |
718e3744 | 3575 | } |
3576 | ||
91e6f25b | 3577 | static const char *rib_update_event2str(enum rib_update_event event) |
2a99ab95 SW |
3578 | { |
3579 | const char *ret = "UNKNOWN"; | |
3580 | ||
3581 | switch (event) { | |
3582 | case RIB_UPDATE_KERNEL: | |
3583 | ret = "RIB_UPDATE_KERNEL"; | |
3584 | break; | |
3585 | case RIB_UPDATE_RMAP_CHANGE: | |
3586 | ret = "RIB_UPDATE_RMAP_CHANGE"; | |
3587 | break; | |
3588 | case RIB_UPDATE_OTHER: | |
3589 | ret = "RIB_UPDATE_OTHER"; | |
3590 | break; | |
3591 | case RIB_UPDATE_MAX: | |
3592 | break; | |
3593 | } | |
3594 | ||
3595 | return ret; | |
3596 | } | |
3597 | ||
3598 | ||
3599 | /* Schedule route nodes to be processed if they match the type */ | |
3600 | static void rib_update_route_node(struct route_node *rn, int type) | |
3601 | { | |
3602 | struct route_entry *re, *next; | |
3603 | bool re_changed = false; | |
3604 | ||
3605 | RNODE_FOREACH_RE_SAFE (rn, re, next) { | |
3606 | if (type == ZEBRA_ROUTE_ALL || type == re->type) { | |
3607 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
3608 | re_changed = true; | |
3609 | } | |
3610 | } | |
3611 | ||
3612 | if (re_changed) | |
3613 | rib_queue_add(rn); | |
3614 | } | |
3615 | ||
1c848137 | 3616 | /* Schedule routes of a particular table (address-family) based on event. */ |
54aeba35 DS |
3617 | void rib_update_table(struct route_table *table, enum rib_update_event event, |
3618 | int rtype) | |
d62a17ae | 3619 | { |
3620 | struct route_node *rn; | |
2a99ab95 SW |
3621 | |
3622 | if (IS_ZEBRA_DEBUG_EVENT) { | |
3623 | struct zebra_vrf *zvrf; | |
3624 | struct vrf *vrf; | |
3625 | ||
630d5962 DS |
3626 | zvrf = table->info |
3627 | ? ((struct rib_table_info *)table->info)->zvrf | |
3628 | : NULL; | |
2a99ab95 SW |
3629 | vrf = zvrf ? zvrf->vrf : NULL; |
3630 | ||
54aeba35 | 3631 | zlog_debug("%s: %s VRF %s Table %u event %s Route type: %s", __func__, |
2a99ab95 | 3632 | table->info ? afi2str( |
630d5962 | 3633 | ((struct rib_table_info *)table->info)->afi) |
2a99ab95 | 3634 | : "Unknown", |
bd47f3a3 | 3635 | VRF_LOGNAME(vrf), zvrf ? zvrf->table_id : 0, |
54aeba35 | 3636 | rib_update_event2str(event), zebra_route_string(rtype)); |
2a99ab95 | 3637 | } |
d62a17ae | 3638 | |
3639 | /* Walk all routes and queue for processing, if appropriate for | |
3640 | * the trigger event. | |
3641 | */ | |
3642 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { | |
1ca60f2c DS |
3643 | /* |
3644 | * If we are looking at a route node and the node | |
3645 | * has already been queued we don't | |
3646 | * need to queue it up again | |
3647 | */ | |
2a99ab95 SW |
3648 | if (rn->info |
3649 | && CHECK_FLAG(rib_dest_from_rnode(rn)->flags, | |
3650 | RIB_ROUTE_ANY_QUEUED)) | |
1ca60f2c | 3651 | continue; |
2a99ab95 | 3652 | |
d62a17ae | 3653 | switch (event) { |
2a99ab95 SW |
3654 | case RIB_UPDATE_KERNEL: |
3655 | rib_update_route_node(rn, ZEBRA_ROUTE_KERNEL); | |
3656 | break; | |
d62a17ae | 3657 | case RIB_UPDATE_RMAP_CHANGE: |
3658 | case RIB_UPDATE_OTHER: | |
54aeba35 | 3659 | rib_update_route_node(rn, rtype); |
d62a17ae | 3660 | break; |
d62a17ae | 3661 | default: |
3662 | break; | |
3663 | } | |
3664 | } | |
b84c7253 | 3665 | } |
3666 | ||
54aeba35 DS |
3667 | static void rib_update_handle_vrf(vrf_id_t vrf_id, enum rib_update_event event, |
3668 | int rtype) | |
718e3744 | 3669 | { |
d62a17ae | 3670 | struct route_table *table; |
1c848137 | 3671 | |
2a99ab95 SW |
3672 | if (IS_ZEBRA_DEBUG_EVENT) |
3673 | zlog_debug("%s: Handling VRF %s event %s", __func__, | |
3674 | vrf_id_to_name(vrf_id), rib_update_event2str(event)); | |
3675 | ||
d62a17ae | 3676 | /* Process routes of interested address-families. */ |
3677 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
2a99ab95 | 3678 | if (table) |
54aeba35 | 3679 | rib_update_table(table, event, rtype); |
718e3744 | 3680 | |
d62a17ae | 3681 | table = zebra_vrf_table(AFI_IP6, SAFI_UNICAST, vrf_id); |
2a99ab95 | 3682 | if (table) |
54aeba35 | 3683 | rib_update_table(table, event, rtype); |
2a99ab95 SW |
3684 | } |
3685 | ||
54aeba35 | 3686 | static void rib_update_handle_vrf_all(enum rib_update_event event, int rtype) |
2a99ab95 SW |
3687 | { |
3688 | struct zebra_router_table *zrt; | |
3689 | ||
3690 | if (IS_ZEBRA_DEBUG_EVENT) | |
3691 | zlog_debug("%s: Handling VRF (ALL) event %s", __func__, | |
3692 | rib_update_event2str(event)); | |
3693 | ||
3694 | /* Just iterate over all the route tables, rather than vrf lookups */ | |
3695 | RB_FOREACH (zrt, zebra_router_table_head, &zrouter.tables) | |
54aeba35 | 3696 | rib_update_table(zrt->table, event, rtype); |
2a99ab95 SW |
3697 | } |
3698 | ||
3699 | struct rib_update_ctx { | |
91e6f25b | 3700 | enum rib_update_event event; |
2a99ab95 SW |
3701 | bool vrf_all; |
3702 | vrf_id_t vrf_id; | |
3703 | }; | |
3704 | ||
3705 | static struct rib_update_ctx *rib_update_ctx_init(vrf_id_t vrf_id, | |
91e6f25b | 3706 | enum rib_update_event event) |
2a99ab95 SW |
3707 | { |
3708 | struct rib_update_ctx *ctx; | |
3709 | ||
3710 | ctx = XCALLOC(MTYPE_RIB_UPDATE_CTX, sizeof(struct rib_update_ctx)); | |
3711 | ||
3712 | ctx->event = event; | |
3713 | ctx->vrf_id = vrf_id; | |
3714 | ||
3715 | return ctx; | |
3716 | } | |
3717 | ||
3718 | static void rib_update_ctx_fini(struct rib_update_ctx **ctx) | |
3719 | { | |
3720 | XFREE(MTYPE_RIB_UPDATE_CTX, *ctx); | |
2a99ab95 SW |
3721 | } |
3722 | ||
3723 | static int rib_update_handler(struct thread *thread) | |
3724 | { | |
3725 | struct rib_update_ctx *ctx; | |
3726 | ||
3727 | ctx = THREAD_ARG(thread); | |
3728 | ||
3729 | if (ctx->vrf_all) | |
54aeba35 | 3730 | rib_update_handle_vrf_all(ctx->event, ZEBRA_ROUTE_ALL); |
2a99ab95 | 3731 | else |
54aeba35 | 3732 | rib_update_handle_vrf(ctx->vrf_id, ctx->event, ZEBRA_ROUTE_ALL); |
2a99ab95 SW |
3733 | |
3734 | rib_update_ctx_fini(&ctx); | |
3735 | ||
3736 | return 0; | |
3737 | } | |
3738 | ||
3739 | /* | |
3740 | * Thread list to ensure we don't schedule a ton of events | |
3741 | * if interfaces are flapping for instance. | |
3742 | */ | |
3743 | static struct thread *t_rib_update_threads[RIB_UPDATE_MAX]; | |
3744 | ||
2a99ab95 | 3745 | /* Schedule a RIB update event for all vrfs */ |
91e6f25b | 3746 | void rib_update(enum rib_update_event event) |
2a99ab95 SW |
3747 | { |
3748 | struct rib_update_ctx *ctx; | |
3749 | ||
3750 | ctx = rib_update_ctx_init(0, event); | |
3751 | ||
3752 | ctx->vrf_all = true; | |
3753 | ||
3754 | if (!thread_add_event(zrouter.master, rib_update_handler, ctx, 0, | |
3755 | &t_rib_update_threads[event])) | |
3756 | rib_update_ctx_fini(&ctx); /* Already scheduled */ | |
3757 | else if (IS_ZEBRA_DEBUG_EVENT) | |
05267678 | 3758 | zlog_debug("%s: Scheduled VRF (ALL), event %s", __func__, |
2a99ab95 | 3759 | rib_update_event2str(event)); |
718e3744 | 3760 | } |
3761 | ||
718e3744 | 3762 | /* Delete self installed routes after zebra is relaunched. */ |
95a29032 | 3763 | void rib_sweep_table(struct route_table *table) |
d62a17ae | 3764 | { |
3765 | struct route_node *rn; | |
3766 | struct route_entry *re; | |
3767 | struct route_entry *next; | |
915902cb | 3768 | struct nexthop *nexthop; |
d62a17ae | 3769 | |
915902cb DS |
3770 | if (!table) |
3771 | return; | |
d62a17ae | 3772 | |
6d81b590 MS |
3773 | if (IS_ZEBRA_DEBUG_RIB) |
3774 | zlog_debug("%s: starting", __func__); | |
3775 | ||
915902cb | 3776 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
a2addae8 | 3777 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d4644d41 | 3778 | |
915902cb DS |
3779 | if (IS_ZEBRA_DEBUG_RIB) |
3780 | route_entry_dump(&rn->p, NULL, re); | |
3781 | ||
3782 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
3783 | continue; | |
3784 | ||
3785 | if (!CHECK_FLAG(re->flags, ZEBRA_FLAG_SELFROUTE)) | |
3786 | continue; | |
3787 | ||
d4644d41 DS |
3788 | /* |
3789 | * If routes are older than startup_time then | |
3790 | * we know we read them in from the kernel. | |
3791 | * As such we can safely remove them. | |
3792 | */ | |
3793 | if (zrouter.startup_time < re->uptime) | |
3794 | continue; | |
3795 | ||
915902cb DS |
3796 | /* |
3797 | * So we are starting up and have received | |
3798 | * routes from the kernel that we have installed | |
3799 | * from a previous run of zebra but not cleaned | |
3800 | * up ( say a kill -9 ) | |
3801 | * But since we haven't actually installed | |
3802 | * them yet( we received them from the kernel ) | |
3803 | * we don't think they are active. | |
3804 | * So let's pretend they are active to actually | |
3805 | * remove them. | |
3806 | * In all honesty I'm not sure if we should | |
3807 | * mark them as active when we receive them | |
3808 | * This is startup only so probably ok. | |
3809 | * | |
3810 | * If we ever decide to move rib_sweep_table | |
3811 | * to a different spot (ie startup ) | |
3812 | * this decision needs to be revisited | |
3813 | */ | |
677c1dd5 | 3814 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
c415d895 | 3815 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
915902cb DS |
3816 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
3817 | ||
0c555cc6 DS |
3818 | rib_uninstall_kernel(rn, re); |
3819 | rib_delnode(rn, re); | |
915902cb DS |
3820 | } |
3821 | } | |
6d81b590 MS |
3822 | |
3823 | if (IS_ZEBRA_DEBUG_RIB) | |
3824 | zlog_debug("%s: ends", __func__); | |
718e3744 | 3825 | } |
3826 | ||
3827 | /* Sweep all RIB tables. */ | |
d4644d41 | 3828 | int rib_sweep_route(struct thread *t) |
718e3744 | 3829 | { |
d62a17ae | 3830 | struct vrf *vrf; |
3831 | struct zebra_vrf *zvrf; | |
78104b9b | 3832 | |
a2addae8 | 3833 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
915902cb DS |
3834 | if ((zvrf = vrf->info) == NULL) |
3835 | continue; | |
3836 | ||
d62a17ae | 3837 | rib_sweep_table(zvrf->table[AFI_IP][SAFI_UNICAST]); |
3838 | rib_sweep_table(zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3839 | } | |
95a29032 | 3840 | |
89272910 | 3841 | zebra_router_sweep_route(); |
38e40db1 | 3842 | zebra_router_sweep_nhgs(); |
d4644d41 DS |
3843 | |
3844 | return 0; | |
718e3744 | 3845 | } |
2ea1ab1c VT |
3846 | |
3847 | /* Remove specific by protocol routes from 'table'. */ | |
d7c0a89a | 3848 | unsigned long rib_score_proto_table(uint8_t proto, unsigned short instance, |
47a08aa9 | 3849 | struct route_table *table) |
d62a17ae | 3850 | { |
3851 | struct route_node *rn; | |
3852 | struct route_entry *re; | |
3853 | struct route_entry *next; | |
3854 | unsigned long n = 0; | |
3855 | ||
3856 | if (table) | |
3857 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) | |
a2addae8 | 3858 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 3859 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
3860 | continue; | |
3861 | if (re->type == proto | |
3862 | && re->instance == instance) { | |
3863 | rib_delnode(rn, re); | |
3864 | n++; | |
3865 | } | |
3866 | } | |
3867 | return n; | |
2ea1ab1c VT |
3868 | } |
3869 | ||
3870 | /* Remove specific by protocol routes. */ | |
d7c0a89a | 3871 | unsigned long rib_score_proto(uint8_t proto, unsigned short instance) |
2ea1ab1c | 3872 | { |
d62a17ae | 3873 | struct vrf *vrf; |
3874 | struct zebra_vrf *zvrf; | |
d8612e65 | 3875 | struct other_route_table *ort; |
d62a17ae | 3876 | unsigned long cnt = 0; |
78104b9b | 3877 | |
d8612e65 DS |
3878 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
3879 | zvrf = vrf->info; | |
3880 | if (!zvrf) | |
3881 | continue; | |
78104b9b | 3882 | |
d8612e65 DS |
3883 | cnt += rib_score_proto_table(proto, instance, |
3884 | zvrf->table[AFI_IP][SAFI_UNICAST]) | |
3885 | + rib_score_proto_table( | |
3886 | proto, instance, | |
3887 | zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3888 | ||
81fddbe7 | 3889 | frr_each(otable, &zvrf->other_tables, ort) cnt += |
d8612e65 DS |
3890 | rib_score_proto_table(proto, instance, ort->table); |
3891 | } | |
47a08aa9 | 3892 | |
d62a17ae | 3893 | return cnt; |
2ea1ab1c VT |
3894 | } |
3895 | ||
718e3744 | 3896 | /* Close RIB and clean up kernel routes. */ |
d62a17ae | 3897 | void rib_close_table(struct route_table *table) |
718e3744 | 3898 | { |
d62a17ae | 3899 | struct route_node *rn; |
630d5962 | 3900 | struct rib_table_info *info; |
5f7a4718 | 3901 | rib_dest_t *dest; |
718e3744 | 3902 | |
1e9f448f DS |
3903 | if (!table) |
3904 | return; | |
9fd92e3c | 3905 | |
6ca30e9e | 3906 | info = route_table_get_info(table); |
5adc2528 | 3907 | |
5f7a4718 DS |
3908 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
3909 | dest = rib_dest_from_rnode(rn); | |
1e9f448f | 3910 | |
5f7a4718 | 3911 | if (dest && dest->selected_fib) { |
1e9f448f DS |
3912 | if (info->safi == SAFI_UNICAST) |
3913 | hook_call(rib_update, rn, NULL); | |
3914 | ||
3cdba47a DS |
3915 | rib_uninstall_kernel(rn, dest->selected_fib); |
3916 | dest->selected_fib = NULL; | |
1e9f448f | 3917 | } |
5f7a4718 | 3918 | } |
718e3744 | 3919 | } |
3920 | ||
9bd9717b MS |
3921 | /* |
3922 | * Handler for async dataplane results after a pseudowire installation | |
3923 | */ | |
3924 | static int handle_pw_result(struct zebra_dplane_ctx *ctx) | |
3925 | { | |
9bd9717b MS |
3926 | struct zebra_pw *pw; |
3927 | struct zebra_vrf *vrf; | |
3928 | ||
3929 | /* The pseudowire code assumes success - we act on an error | |
3930 | * result for installation attempts here. | |
3931 | */ | |
3932 | if (dplane_ctx_get_op(ctx) != DPLANE_OP_PW_INSTALL) | |
3933 | goto done; | |
3934 | ||
3935 | if (dplane_ctx_get_status(ctx) != ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
3936 | vrf = zebra_vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); | |
7c7ef4a8 | 3937 | pw = zebra_pw_find(vrf, dplane_ctx_get_ifname(ctx)); |
9bd9717b | 3938 | if (pw) |
fd563cc7 KS |
3939 | zebra_pw_install_failure(pw, |
3940 | dplane_ctx_get_pw_status(ctx)); | |
9bd9717b MS |
3941 | } |
3942 | ||
3943 | done: | |
a20e6c32 | 3944 | dplane_ctx_fini(&ctx); |
9bd9717b | 3945 | |
9f2d0354 | 3946 | return 0; |
9bd9717b MS |
3947 | } |
3948 | ||
3949 | ||
7cdb1a84 | 3950 | /* |
d37f4d6c MS |
3951 | * Handle results from the dataplane system. Dequeue update context |
3952 | * structs, dispatch to appropriate internal handlers. | |
7cdb1a84 MS |
3953 | */ |
3954 | static int rib_process_dplane_results(struct thread *thread) | |
3955 | { | |
25779064 | 3956 | struct zebra_dplane_ctx *ctx; |
4c206c8f | 3957 | struct dplane_ctx_q ctxlist; |
2fc69f03 | 3958 | bool shut_p = false; |
4c206c8f MS |
3959 | |
3960 | /* Dequeue a list of completed updates with one lock/unlock cycle */ | |
7cdb1a84 MS |
3961 | |
3962 | do { | |
4c206c8f MS |
3963 | TAILQ_INIT(&ctxlist); |
3964 | ||
7cdb1a84 | 3965 | /* Take lock controlling queue of results */ |
00dffa8c | 3966 | frr_with_mutex(&dplane_mutex) { |
d37f4d6c | 3967 | /* Dequeue list of context structs */ |
4c206c8f | 3968 | dplane_ctx_list_append(&ctxlist, &rib_dplane_q); |
7cdb1a84 | 3969 | } |
7cdb1a84 | 3970 | |
4c206c8f MS |
3971 | /* Dequeue context block */ |
3972 | ctx = dplane_ctx_dequeue(&ctxlist); | |
3973 | ||
3974 | /* If we've emptied the results queue, we're done */ | |
3975 | if (ctx == NULL) | |
7cdb1a84 | 3976 | break; |
7cdb1a84 | 3977 | |
2fc69f03 MS |
3978 | /* If zebra is shutting down, avoid processing results, |
3979 | * just drain the results queue. | |
3980 | */ | |
3981 | shut_p = atomic_load_explicit(&zrouter.in_shutdown, | |
3982 | memory_order_relaxed); | |
3983 | if (shut_p) { | |
3984 | while (ctx) { | |
3985 | dplane_ctx_fini(&ctx); | |
3986 | ||
3987 | ctx = dplane_ctx_dequeue(&ctxlist); | |
3988 | } | |
3989 | ||
3990 | continue; | |
3991 | } | |
3992 | ||
4c206c8f | 3993 | while (ctx) { |
d37f4d6c MS |
3994 | switch (dplane_ctx_get_op(ctx)) { |
3995 | case DPLANE_OP_ROUTE_INSTALL: | |
3996 | case DPLANE_OP_ROUTE_UPDATE: | |
3997 | case DPLANE_OP_ROUTE_DELETE: | |
188a00e0 MS |
3998 | { |
3999 | /* Bit of special case for route updates | |
4000 | * that were generated by async notifications: | |
4001 | * we don't want to continue processing these | |
4002 | * in the rib. | |
4003 | */ | |
4004 | if (dplane_ctx_get_notif_provider(ctx) == 0) | |
4005 | rib_process_result(ctx); | |
4006 | else | |
4007 | dplane_ctx_fini(&ctx); | |
4008 | } | |
4009 | break; | |
d37f4d6c | 4010 | |
54818e3b MS |
4011 | case DPLANE_OP_ROUTE_NOTIFY: |
4012 | rib_process_dplane_notify(ctx); | |
d37f4d6c MS |
4013 | break; |
4014 | ||
9865e1c3 SW |
4015 | case DPLANE_OP_NH_INSTALL: |
4016 | case DPLANE_OP_NH_UPDATE: | |
4017 | case DPLANE_OP_NH_DELETE: | |
4018 | zebra_nhg_dplane_result(ctx); | |
4019 | break; | |
4020 | ||
d37f4d6c MS |
4021 | case DPLANE_OP_LSP_INSTALL: |
4022 | case DPLANE_OP_LSP_UPDATE: | |
4023 | case DPLANE_OP_LSP_DELETE: | |
188a00e0 MS |
4024 | { |
4025 | /* Bit of special case for LSP updates | |
4026 | * that were generated by async notifications: | |
4027 | * we don't want to continue processing these. | |
4028 | */ | |
4029 | if (dplane_ctx_get_notif_provider(ctx) == 0) | |
4030 | zebra_mpls_lsp_dplane_result(ctx); | |
4031 | else | |
4032 | dplane_ctx_fini(&ctx); | |
4033 | } | |
4034 | break; | |
d37f4d6c | 4035 | |
104e3ad9 MS |
4036 | case DPLANE_OP_LSP_NOTIFY: |
4037 | zebra_mpls_process_dplane_notify(ctx); | |
d37f4d6c MS |
4038 | break; |
4039 | ||
9bd9717b MS |
4040 | case DPLANE_OP_PW_INSTALL: |
4041 | case DPLANE_OP_PW_UNINSTALL: | |
4042 | handle_pw_result(ctx); | |
4043 | break; | |
4044 | ||
cf363e1b MS |
4045 | case DPLANE_OP_SYS_ROUTE_ADD: |
4046 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
4047 | /* No further processing in zebra for these. */ | |
4048 | dplane_ctx_fini(&ctx); | |
4049 | break; | |
4050 | ||
036d93c0 MS |
4051 | case DPLANE_OP_MAC_INSTALL: |
4052 | case DPLANE_OP_MAC_DELETE: | |
4053 | zebra_vxlan_handle_result(ctx); | |
4054 | break; | |
4055 | ||
f62e5480 JU |
4056 | case DPLANE_OP_RULE_ADD: |
4057 | case DPLANE_OP_RULE_DELETE: | |
4058 | case DPLANE_OP_RULE_UPDATE: | |
5162e000 PG |
4059 | case DPLANE_OP_IPTABLE_ADD: |
4060 | case DPLANE_OP_IPTABLE_DELETE: | |
ef524230 PG |
4061 | case DPLANE_OP_IPSET_ADD: |
4062 | case DPLANE_OP_IPSET_DELETE: | |
4063 | case DPLANE_OP_IPSET_ENTRY_ADD: | |
4064 | case DPLANE_OP_IPSET_ENTRY_DELETE: | |
f62e5480 JU |
4065 | zebra_pbr_dplane_result(ctx); |
4066 | break; | |
4067 | ||
931fa60c MS |
4068 | /* Some op codes not handled here */ |
4069 | case DPLANE_OP_ADDR_INSTALL: | |
4070 | case DPLANE_OP_ADDR_UNINSTALL: | |
4071 | case DPLANE_OP_NEIGH_INSTALL: | |
4072 | case DPLANE_OP_NEIGH_UPDATE: | |
4073 | case DPLANE_OP_NEIGH_DELETE: | |
0a27a2fe PG |
4074 | case DPLANE_OP_NEIGH_IP_INSTALL: |
4075 | case DPLANE_OP_NEIGH_IP_DELETE: | |
0bbd4ff4 MS |
4076 | case DPLANE_OP_VTEP_ADD: |
4077 | case DPLANE_OP_VTEP_DELETE: | |
d68e74b4 | 4078 | case DPLANE_OP_NEIGH_DISCOVER: |
c60522f7 | 4079 | case DPLANE_OP_BR_PORT_UPDATE: |
e18747a9 | 4080 | case DPLANE_OP_NEIGH_TABLE_UPDATE: |
62b4b7e4 | 4081 | case DPLANE_OP_GRE_SET: |
931fa60c | 4082 | case DPLANE_OP_NONE: |
d37f4d6c MS |
4083 | /* Don't expect this: just return the struct? */ |
4084 | dplane_ctx_fini(&ctx); | |
4085 | break; | |
931fa60c | 4086 | |
d37f4d6c | 4087 | } /* Dispatch by op code */ |
4c206c8f MS |
4088 | |
4089 | ctx = dplane_ctx_dequeue(&ctxlist); | |
4090 | } | |
4091 | ||
5709131c | 4092 | } while (1); |
7cdb1a84 | 4093 | |
5709131c | 4094 | return 0; |
7cdb1a84 MS |
4095 | } |
4096 | ||
4097 | /* | |
4098 | * Results are returned from the dataplane subsystem, in the context of | |
1bcea841 | 4099 | * the dataplane pthread. We enqueue the results here for processing by |
7cdb1a84 MS |
4100 | * the main thread later. |
4101 | */ | |
4c206c8f | 4102 | static int rib_dplane_results(struct dplane_ctx_q *ctxlist) |
7cdb1a84 MS |
4103 | { |
4104 | /* Take lock controlling queue of results */ | |
00dffa8c | 4105 | frr_with_mutex(&dplane_mutex) { |
4c206c8f MS |
4106 | /* Enqueue context blocks */ |
4107 | dplane_ctx_list_append(&rib_dplane_q, ctxlist); | |
7cdb1a84 | 4108 | } |
7cdb1a84 | 4109 | |
4c206c8f | 4110 | /* Ensure event is signalled to zebra main pthread */ |
3801e764 | 4111 | thread_add_event(zrouter.master, rib_process_dplane_results, NULL, 0, |
7cdb1a84 MS |
4112 | &t_dplane); |
4113 | ||
5709131c | 4114 | return 0; |
7cdb1a84 MS |
4115 | } |
4116 | ||
eaa2716d SW |
4117 | /* |
4118 | * Ensure there are no empty slots in the route_info array. | |
4119 | * Every route type in zebra should be present there. | |
4120 | */ | |
4121 | static void check_route_info(void) | |
4122 | { | |
4123 | int len = array_size(route_info); | |
4124 | ||
4125 | /* | |
4126 | * ZEBRA_ROUTE_SYSTEM is special cased since | |
4127 | * its key is 0 anyway. | |
4128 | * | |
4129 | * ZEBRA_ROUTE_ALL is also ignored. | |
4130 | */ | |
4131 | for (int i = 0; i < len; i++) { | |
4132 | if (i == ZEBRA_ROUTE_SYSTEM || i == ZEBRA_ROUTE_ALL) | |
4133 | continue; | |
4134 | assert(route_info[i].key); | |
8dc7a759 | 4135 | assert(route_info[i].meta_q_map < MQ_SIZE); |
eaa2716d SW |
4136 | } |
4137 | } | |
4138 | ||
718e3744 | 4139 | /* Routing information base initialize. */ |
d62a17ae | 4140 | void rib_init(void) |
718e3744 | 4141 | { |
eaa2716d SW |
4142 | check_route_info(); |
4143 | ||
2561d12e | 4144 | rib_queue_init(); |
7cdb1a84 MS |
4145 | |
4146 | /* Init dataplane, and register for results */ | |
4147 | pthread_mutex_init(&dplane_mutex, NULL); | |
4148 | TAILQ_INIT(&rib_dplane_q); | |
4c206c8f | 4149 | zebra_dplane_init(rib_dplane_results); |
718e3744 | 4150 | } |
0915bb0c AS |
4151 | |
4152 | /* | |
4153 | * vrf_id_get_next | |
4154 | * | |
4155 | * Get the first vrf id that is greater than the given vrf id if any. | |
4156 | * | |
2951a7a4 | 4157 | * Returns true if a vrf id was found, false otherwise. |
0915bb0c | 4158 | */ |
d62a17ae | 4159 | static inline int vrf_id_get_next(vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 4160 | { |
d62a17ae | 4161 | struct vrf *vrf; |
b72ede27 | 4162 | |
d62a17ae | 4163 | vrf = vrf_lookup_by_id(vrf_id); |
4164 | if (vrf) { | |
4165 | vrf = RB_NEXT(vrf_id_head, vrf); | |
4166 | if (vrf) { | |
4167 | *next_id_p = vrf->vrf_id; | |
4168 | return 1; | |
4169 | } | |
4170 | } | |
0915bb0c | 4171 | |
d62a17ae | 4172 | return 0; |
0915bb0c AS |
4173 | } |
4174 | ||
4175 | /* | |
4176 | * rib_tables_iter_next | |
4177 | * | |
4178 | * Returns the next table in the iteration. | |
4179 | */ | |
d62a17ae | 4180 | struct route_table *rib_tables_iter_next(rib_tables_iter_t *iter) |
4181 | { | |
4182 | struct route_table *table; | |
4183 | ||
4184 | /* | |
4185 | * Array that helps us go over all AFI/SAFI combinations via one | |
4186 | * index. | |
4187 | */ | |
2b64873d | 4188 | static const struct { |
d62a17ae | 4189 | afi_t afi; |
4190 | safi_t safi; | |
4191 | } afi_safis[] = { | |
4192 | {AFI_IP, SAFI_UNICAST}, {AFI_IP, SAFI_MULTICAST}, | |
4193 | {AFI_IP, SAFI_LABELED_UNICAST}, {AFI_IP6, SAFI_UNICAST}, | |
4194 | {AFI_IP6, SAFI_MULTICAST}, {AFI_IP6, SAFI_LABELED_UNICAST}, | |
4195 | }; | |
4196 | ||
4197 | table = NULL; | |
4198 | ||
4199 | switch (iter->state) { | |
4200 | ||
4201 | case RIB_TABLES_ITER_S_INIT: | |
4202 | iter->vrf_id = VRF_DEFAULT; | |
4203 | iter->afi_safi_ix = -1; | |
4204 | ||
4205 | /* Fall through */ | |
4206 | ||
4207 | case RIB_TABLES_ITER_S_ITERATING: | |
4208 | iter->afi_safi_ix++; | |
4209 | while (1) { | |
4210 | ||
4211 | while (iter->afi_safi_ix | |
7e3a1ec7 | 4212 | < (int)array_size(afi_safis)) { |
d62a17ae | 4213 | table = zebra_vrf_table( |
4214 | afi_safis[iter->afi_safi_ix].afi, | |
4215 | afi_safis[iter->afi_safi_ix].safi, | |
4216 | iter->vrf_id); | |
4217 | if (table) | |
4218 | break; | |
4219 | ||
4220 | iter->afi_safi_ix++; | |
4221 | } | |
4222 | ||
4223 | /* | |
4224 | * Found another table in this vrf. | |
4225 | */ | |
4226 | if (table) | |
4227 | break; | |
4228 | ||
4229 | /* | |
4230 | * Done with all tables in the current vrf, go to the | |
4231 | * next | |
4232 | * one. | |
4233 | */ | |
4234 | if (!vrf_id_get_next(iter->vrf_id, &iter->vrf_id)) | |
4235 | break; | |
4236 | ||
4237 | iter->afi_safi_ix = 0; | |
4238 | } | |
0915bb0c | 4239 | |
0915bb0c AS |
4240 | break; |
4241 | ||
d62a17ae | 4242 | case RIB_TABLES_ITER_S_DONE: |
4243 | return NULL; | |
0915bb0c AS |
4244 | } |
4245 | ||
d62a17ae | 4246 | if (table) |
4247 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
4248 | else | |
4249 | iter->state = RIB_TABLES_ITER_S_DONE; | |
0915bb0c | 4250 | |
d62a17ae | 4251 | return table; |
0915bb0c | 4252 | } |