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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 | ||
07ef3e34 | 135 | static void PRINTFRR(5, 6) |
d62a17ae | 136 | _rnode_zlog(const char *_func, vrf_id_t vrf_id, struct route_node *rn, |
137 | int priority, const char *msgfmt, ...) | |
2263a412 | 138 | { |
d62a17ae | 139 | char buf[SRCDEST2STR_BUFFER + sizeof(" (MRIB)")]; |
140 | char msgbuf[512]; | |
141 | va_list ap; | |
c2c02b76 | 142 | uint32_t table = 0; |
2263a412 | 143 | |
d62a17ae | 144 | va_start(ap, msgfmt); |
145 | vsnprintf(msgbuf, sizeof(msgbuf), msgfmt, ap); | |
146 | va_end(ap); | |
2263a412 | 147 | |
d62a17ae | 148 | if (rn) { |
630d5962 | 149 | struct rib_table_info *info = srcdest_rnode_table_info(rn); |
c2c02b76 DS |
150 | rib_dest_t *dest = NULL; |
151 | struct route_entry *re = NULL; | |
152 | ||
d62a17ae | 153 | srcdest_rnode2str(rn, buf, sizeof(buf)); |
cb653491 | 154 | |
d62a17ae | 155 | if (info->safi == SAFI_MULTICAST) |
eab4a5c2 | 156 | strlcat(buf, " (MRIB)", sizeof(buf)); |
c2c02b76 DS |
157 | |
158 | dest = rib_dest_from_rnode(rn); | |
159 | if (dest) | |
160 | re = re_list_first(&dest->routes); | |
161 | if (re) | |
162 | table = re->table; | |
d62a17ae | 163 | } else { |
164 | snprintf(buf, sizeof(buf), "{(route_node *) NULL}"); | |
165 | } | |
2263a412 | 166 | |
c2c02b76 | 167 | zlog(priority, "%s: (%u:%u):%s: %s", _func, vrf_id, table, buf, msgbuf); |
2263a412 DL |
168 | } |
169 | ||
61e6de9d DS |
170 | static char *_dump_re_status(const struct route_entry *re, char *buf, |
171 | size_t len) | |
172 | { | |
173 | if (re->status == 0) { | |
174 | snprintfrr(buf, len, "None "); | |
175 | return buf; | |
176 | } | |
177 | ||
178 | snprintfrr( | |
179 | buf, len, "%s%s%s%s%s%s%s", | |
180 | CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED) ? "Removed " : "", | |
181 | CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED) ? "Changed " : "", | |
182 | CHECK_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED) | |
183 | ? "Label Changed " | |
184 | : "", | |
185 | CHECK_FLAG(re->status, ROUTE_ENTRY_QUEUED) ? "Queued " : "", | |
186 | CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED) ? "Installed " | |
187 | : "", | |
188 | CHECK_FLAG(re->status, ROUTE_ENTRY_FAILED) ? "Failed " : "", | |
189 | CHECK_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG) ? "Fib NHG " | |
190 | : ""); | |
191 | return buf; | |
192 | } | |
193 | ||
d62a17ae | 194 | #define rnode_debug(node, vrf_id, ...) \ |
2263a412 | 195 | _rnode_zlog(__func__, vrf_id, node, LOG_DEBUG, __VA_ARGS__) |
d62a17ae | 196 | #define rnode_info(node, ...) \ |
2263a412 DL |
197 | _rnode_zlog(__func__, vrf_id, node, LOG_INFO, __VA_ARGS__) |
198 | ||
fd289fc8 | 199 | uint8_t route_distance(int type) |
40c7bdb0 | 200 | { |
fd289fc8 | 201 | uint8_t distance; |
40c7bdb0 | 202 | |
d62a17ae | 203 | if ((unsigned)type >= array_size(route_info)) |
204 | distance = 150; | |
205 | else | |
206 | distance = route_info[type].distance; | |
40c7bdb0 | 207 | |
d62a17ae | 208 | return distance; |
40c7bdb0 | 209 | } |
210 | ||
d7c0a89a | 211 | int is_zebra_valid_kernel_table(uint32_t table_id) |
7a4bb9c5 | 212 | { |
8f500a1c | 213 | #ifdef linux |
d62a17ae | 214 | if ((table_id == RT_TABLE_UNSPEC) || (table_id == RT_TABLE_LOCAL) |
215 | || (table_id == RT_TABLE_COMPAT)) | |
216 | return 0; | |
8f500a1c RW |
217 | #endif |
218 | ||
d62a17ae | 219 | return 1; |
7a4bb9c5 DS |
220 | } |
221 | ||
d7c0a89a | 222 | int is_zebra_main_routing_table(uint32_t table_id) |
7a4bb9c5 | 223 | { |
c447ad08 | 224 | if (table_id == RT_TABLE_MAIN) |
d62a17ae | 225 | return 1; |
226 | return 0; | |
7a4bb9c5 DS |
227 | } |
228 | ||
86391e56 | 229 | int zebra_check_addr(const struct prefix *p) |
0aabccc0 | 230 | { |
d62a17ae | 231 | if (p->family == AF_INET) { |
d7c0a89a | 232 | uint32_t addr; |
0aabccc0 | 233 | |
d62a17ae | 234 | addr = p->u.prefix4.s_addr; |
235 | addr = ntohl(addr); | |
0aabccc0 | 236 | |
d62a17ae | 237 | if (IPV4_NET127(addr) || IN_CLASSD(addr) |
238 | || IPV4_LINKLOCAL(addr)) | |
239 | return 0; | |
240 | } | |
241 | if (p->family == AF_INET6) { | |
242 | if (IN6_IS_ADDR_LOOPBACK(&p->u.prefix6)) | |
243 | return 0; | |
244 | if (IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
245 | return 0; | |
246 | } | |
247 | return 1; | |
0aabccc0 DD |
248 | } |
249 | ||
6e26278c DS |
250 | /** |
251 | * copy_nexthop - copy a nexthop to the rib structure. | |
252 | */ | |
d62a17ae | 253 | void route_entry_copy_nexthops(struct route_entry *re, struct nexthop *nh) |
6e26278c | 254 | { |
c415d895 MS |
255 | assert(!re->nhe->nhg.nexthop); |
256 | copy_nexthops(&re->nhe->nhg.nexthop, nh, NULL); | |
718e3744 | 257 | } |
258 | ||
5463ce26 MS |
259 | static void route_entry_attach_ref(struct route_entry *re, |
260 | struct nhg_hash_entry *new) | |
718e3744 | 261 | { |
0eb97b86 | 262 | re->nhe = new; |
5463ce26 | 263 | re->nhe_id = new->id; |
718e3744 | 264 | |
5463ce26 | 265 | zebra_nhg_increment_ref(new); |
718e3744 | 266 | } |
267 | ||
cd7108ba EDP |
268 | int route_entry_update_nhe(struct route_entry *re, |
269 | struct nhg_hash_entry *new_nhghe) | |
718e3744 | 270 | { |
377e29f7 | 271 | struct nhg_hash_entry *old; |
5463ce26 | 272 | int ret = 0; |
718e3744 | 273 | |
cd7108ba | 274 | if (new_nhghe == NULL) { |
c415d895 MS |
275 | if (re->nhe) |
276 | zebra_nhg_decrement_ref(re->nhe); | |
277 | re->nhe = NULL; | |
5463ce26 MS |
278 | goto done; |
279 | } | |
718e3744 | 280 | |
1f655680 | 281 | if ((re->nhe_id != 0) && re->nhe && (re->nhe != new_nhghe)) { |
c415d895 | 282 | old = re->nhe; |
718e3744 | 283 | |
cd7108ba | 284 | route_entry_attach_ref(re, new_nhghe); |
718e3744 | 285 | |
5463ce26 MS |
286 | if (old) |
287 | zebra_nhg_decrement_ref(old); | |
84a89a8d | 288 | } else if (!re->nhe) |
5463ce26 | 289 | /* This is the first time it's being attached */ |
cd7108ba | 290 | route_entry_attach_ref(re, new_nhghe); |
595db7f1 | 291 | |
5463ce26 MS |
292 | done: |
293 | return ret; | |
595db7f1 | 294 | } |
295 | ||
2e8db20d EDP |
296 | void rib_handle_nhg_replace(struct nhg_hash_entry *old_entry, |
297 | struct nhg_hash_entry *new_entry) | |
1f655680 SW |
298 | { |
299 | struct zebra_router_table *zrt; | |
300 | struct route_node *rn; | |
301 | struct route_entry *re, *next; | |
302 | ||
303 | if (IS_ZEBRA_DEBUG_RIB_DETAILED || IS_ZEBRA_DEBUG_NHG_DETAIL) | |
304 | zlog_debug("%s: replacing routes nhe (%u) OLD %p NEW %p", | |
2e8db20d | 305 | __func__, new_entry->id, new_entry, old_entry); |
1f655680 SW |
306 | |
307 | /* We have to do them ALL */ | |
308 | RB_FOREACH (zrt, zebra_router_table_head, &zrouter.tables) { | |
309 | for (rn = route_top(zrt->table); rn; | |
310 | rn = srcdest_route_next(rn)) { | |
311 | RNODE_FOREACH_RE_SAFE (rn, re, next) { | |
2e8db20d EDP |
312 | if (re->nhe && re->nhe == old_entry) |
313 | route_entry_update_nhe(re, new_entry); | |
1f655680 SW |
314 | } |
315 | } | |
316 | } | |
317 | } | |
318 | ||
d62a17ae | 319 | struct route_entry *rib_match(afi_t afi, safi_t safi, vrf_id_t vrf_id, |
320 | union g_addr *addr, struct route_node **rn_out) | |
321 | { | |
322 | struct prefix p; | |
323 | struct route_table *table; | |
324 | struct route_node *rn; | |
5f7a4718 | 325 | struct route_entry *match = NULL; |
d62a17ae | 326 | |
327 | /* Lookup table. */ | |
328 | table = zebra_vrf_table(afi, safi, vrf_id); | |
329 | if (!table) | |
330 | return 0; | |
331 | ||
332 | memset(&p, 0, sizeof(struct prefix)); | |
333 | p.family = afi; | |
334 | if (afi == AFI_IP) { | |
335 | p.u.prefix4 = addr->ipv4; | |
336 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
337 | } else { | |
338 | p.u.prefix6 = addr->ipv6; | |
339 | p.prefixlen = IPV6_MAX_PREFIXLEN; | |
340 | } | |
718e3744 | 341 | |
c4efd0f4 | 342 | rn = route_node_match(table, &p); |
718e3744 | 343 | |
d62a17ae | 344 | while (rn) { |
5f7a4718 DS |
345 | rib_dest_t *dest; |
346 | ||
d62a17ae | 347 | route_unlock_node(rn); |
718e3744 | 348 | |
5f7a4718 | 349 | dest = rib_dest_from_rnode(rn); |
996c9314 LB |
350 | if (dest && dest->selected_fib |
351 | && !CHECK_FLAG(dest->selected_fib->status, | |
352 | ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 353 | match = dest->selected_fib; |
718e3744 | 354 | |
d62a17ae | 355 | /* If there is no selected route or matched route is EGP, go up |
356 | tree. */ | |
357 | if (!match) { | |
358 | do { | |
359 | rn = rn->parent; | |
360 | } while (rn && rn->info == NULL); | |
361 | if (rn) | |
362 | route_lock_node(rn); | |
363 | } else { | |
364 | if (match->type != ZEBRA_ROUTE_CONNECT) { | |
677c1dd5 DS |
365 | if (!CHECK_FLAG(match->status, |
366 | ROUTE_ENTRY_INSTALLED)) | |
d62a17ae | 367 | return NULL; |
368 | } | |
369 | ||
370 | if (rn_out) | |
371 | *rn_out = rn; | |
372 | return match; | |
373 | } | |
16814f96 | 374 | } |
d62a17ae | 375 | return NULL; |
376 | } | |
377 | ||
378 | struct route_entry *rib_match_ipv4_multicast(vrf_id_t vrf_id, | |
379 | struct in_addr addr, | |
380 | struct route_node **rn_out) | |
381 | { | |
382 | struct route_entry *re = NULL, *mre = NULL, *ure = NULL; | |
383 | struct route_node *m_rn = NULL, *u_rn = NULL; | |
384 | union g_addr gaddr = {.ipv4 = addr}; | |
385 | ||
526052fb | 386 | switch (zrouter.ipv4_multicast_mode) { |
d62a17ae | 387 | case MCAST_MRIB_ONLY: |
388 | return rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
389 | rn_out); | |
390 | case MCAST_URIB_ONLY: | |
391 | return rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, rn_out); | |
392 | case MCAST_NO_CONFIG: | |
393 | case MCAST_MIX_MRIB_FIRST: | |
394 | re = mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, | |
395 | &m_rn); | |
396 | if (!mre) | |
397 | re = ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, | |
398 | &gaddr, &u_rn); | |
399 | break; | |
400 | case MCAST_MIX_DISTANCE: | |
401 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
402 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
403 | if (mre && ure) | |
404 | re = ure->distance < mre->distance ? ure : mre; | |
405 | else if (mre) | |
406 | re = mre; | |
407 | else if (ure) | |
408 | re = ure; | |
409 | break; | |
410 | case MCAST_MIX_PFXLEN: | |
411 | mre = rib_match(AFI_IP, SAFI_MULTICAST, vrf_id, &gaddr, &m_rn); | |
412 | ure = rib_match(AFI_IP, SAFI_UNICAST, vrf_id, &gaddr, &u_rn); | |
413 | if (mre && ure) | |
414 | re = u_rn->p.prefixlen > m_rn->p.prefixlen ? ure : mre; | |
415 | else if (mre) | |
416 | re = mre; | |
417 | else if (ure) | |
418 | re = ure; | |
419 | break; | |
718e3744 | 420 | } |
33550aa8 | 421 | |
d62a17ae | 422 | if (rn_out) |
423 | *rn_out = (re == mre) ? m_rn : u_rn; | |
718e3744 | 424 | |
d62a17ae | 425 | if (IS_ZEBRA_DEBUG_RIB) { |
426 | char buf[BUFSIZ]; | |
427 | inet_ntop(AF_INET, &addr, buf, BUFSIZ); | |
4623d897 | 428 | |
bd47f3a3 JU |
429 | zlog_debug("%s: %s: vrf: %s(%u) found %s, using %s", __func__, |
430 | buf, vrf_id_to_name(vrf_id), vrf_id, | |
d62a17ae | 431 | mre ? (ure ? "MRIB+URIB" : "MRIB") |
432 | : ure ? "URIB" : "nothing", | |
433 | re == ure ? "URIB" : re == mre ? "MRIB" : "none"); | |
434 | } | |
435 | return re; | |
4623d897 DL |
436 | } |
437 | ||
d62a17ae | 438 | struct route_entry *rib_lookup_ipv4(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
718e3744 | 439 | { |
d62a17ae | 440 | struct route_table *table; |
441 | struct route_node *rn; | |
5f7a4718 | 442 | struct route_entry *match = NULL; |
5f7a4718 | 443 | rib_dest_t *dest; |
718e3744 | 444 | |
d62a17ae | 445 | /* Lookup table. */ |
446 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
447 | if (!table) | |
448 | return 0; | |
718e3744 | 449 | |
d62a17ae | 450 | rn = route_node_lookup(table, (struct prefix *)p); |
718e3744 | 451 | |
d62a17ae | 452 | /* No route for this prefix. */ |
453 | if (!rn) | |
454 | return NULL; | |
718e3744 | 455 | |
d62a17ae | 456 | /* Unlock node. */ |
457 | route_unlock_node(rn); | |
5f7a4718 | 458 | dest = rib_dest_from_rnode(rn); |
718e3744 | 459 | |
996c9314 LB |
460 | if (dest && dest->selected_fib |
461 | && !CHECK_FLAG(dest->selected_fib->status, ROUTE_ENTRY_REMOVED)) | |
5f7a4718 | 462 | match = dest->selected_fib; |
718e3744 | 463 | |
d62a17ae | 464 | if (!match) |
465 | return NULL; | |
718e3744 | 466 | |
d62a17ae | 467 | if (match->type == ZEBRA_ROUTE_CONNECT) |
468 | return match; | |
f9e1b38e | 469 | |
677c1dd5 DS |
470 | if (CHECK_FLAG(match->status, ROUTE_ENTRY_INSTALLED)) |
471 | return match; | |
718e3744 | 472 | |
d62a17ae | 473 | return NULL; |
718e3744 | 474 | } |
475 | ||
a64448ba DS |
476 | /* |
477 | * Is this RIB labeled-unicast? It must be of type BGP and all paths | |
478 | * (nexthops) must have a label. | |
479 | */ | |
d62a17ae | 480 | int zebra_rib_labeled_unicast(struct route_entry *re) |
a64448ba | 481 | { |
d62a17ae | 482 | struct nexthop *nexthop = NULL; |
a64448ba | 483 | |
d62a17ae | 484 | if (re->type != ZEBRA_ROUTE_BGP) |
485 | return 0; | |
a64448ba | 486 | |
c415d895 | 487 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
d62a17ae | 488 | if (!nexthop->nh_label || !nexthop->nh_label->num_labels) |
489 | return 0; | |
6b0655a2 | 490 | |
d62a17ae | 491 | return 1; |
a64448ba | 492 | } |
718e3744 | 493 | |
6ae24471 DS |
494 | /* Update flag indicates whether this is a "replace" or not. Currently, this |
495 | * is only used for IPv4. | |
496 | */ | |
0c555cc6 DS |
497 | void rib_install_kernel(struct route_node *rn, struct route_entry *re, |
498 | struct route_entry *old) | |
718e3744 | 499 | { |
d62a17ae | 500 | struct nexthop *nexthop; |
630d5962 | 501 | struct rib_table_info *info = srcdest_rnode_table_info(rn); |
d62a17ae | 502 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
97f5b441 MS |
503 | const struct prefix *p, *src_p; |
504 | enum zebra_dplane_result ret; | |
505 | ||
506 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
718e3744 | 507 | |
d62a17ae | 508 | srcdest_rnode_prefixes(rn, &p, &src_p); |
416ec78d | 509 | |
d62a17ae | 510 | if (info->safi != SAFI_UNICAST) { |
c415d895 | 511 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
d62a17ae | 512 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 513 | return; |
d62a17ae | 514 | } |
718e3744 | 515 | |
9ef49038 | 516 | |
8dfbc657 SW |
517 | /* |
518 | * Install the resolved nexthop object first. | |
519 | */ | |
c415d895 | 520 | zebra_nhg_install_kernel(re->nhe); |
8dfbc657 | 521 | |
2063a814 DS |
522 | /* |
523 | * If this is a replace to a new RE let the originator of the RE | |
524 | * know that they've lost | |
525 | */ | |
9a9f8926 | 526 | if (old && (old != re) && (old->type != re->type)) |
77b38a4a S |
527 | zsend_route_notify_owner(old, p, ZAPI_ROUTE_BETTER_ADMIN_WON, |
528 | info->afi, info->safi); | |
25b9cb0c | 529 | |
97f5b441 MS |
530 | /* Update fib selection */ |
531 | dest->selected_fib = re; | |
532 | ||
d62a17ae | 533 | /* |
534 | * Make sure we update the FPM any time we send new information to | |
535 | * the kernel. | |
536 | */ | |
537 | hook_call(rib_update, rn, "installing in kernel"); | |
97f5b441 MS |
538 | |
539 | /* Send add or update */ | |
8263d1d0 | 540 | if (old) |
97f5b441 | 541 | ret = dplane_route_update(rn, re, old); |
5709131c | 542 | else |
97f5b441 | 543 | ret = dplane_route_add(rn, re); |
97f5b441 MS |
544 | |
545 | switch (ret) { | |
ea1c14f6 | 546 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
60f98b23 | 547 | SET_FLAG(re->status, ROUTE_ENTRY_QUEUED); |
efe6c026 MS |
548 | |
549 | if (old) { | |
60f98b23 | 550 | SET_FLAG(old->status, ROUTE_ENTRY_QUEUED); |
efe6c026 MS |
551 | |
552 | /* Free old FIB nexthop group */ | |
7483dcbe | 553 | UNSET_FLAG(old->status, ROUTE_ENTRY_USE_FIB_NHG); |
efe6c026 MS |
554 | if (old->fib_ng.nexthop) { |
555 | nexthops_free(old->fib_ng.nexthop); | |
556 | old->fib_ng.nexthop = NULL; | |
557 | } | |
efe6c026 MS |
558 | } |
559 | ||
97f5b441 MS |
560 | if (zvrf) |
561 | zvrf->installs_queued++; | |
1e885672 | 562 | break; |
ea1c14f6 | 563 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
97f5b441 MS |
564 | { |
565 | char str[SRCDEST2STR_BUFFER]; | |
566 | ||
567 | srcdest_rnode2str(rn, str, sizeof(str)); | |
568 | flog_err(EC_ZEBRA_DP_INSTALL_FAIL, | |
b96f64f7 DS |
569 | "%u:%u:%s: Failed to enqueue dataplane install", |
570 | re->vrf_id, re->table, str); | |
1e885672 | 571 | break; |
97f5b441 | 572 | } |
ea1c14f6 | 573 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
97f5b441 MS |
574 | if (zvrf) |
575 | zvrf->installs++; | |
1e885672 DS |
576 | break; |
577 | } | |
d62a17ae | 578 | |
0c555cc6 | 579 | return; |
718e3744 | 580 | } |
581 | ||
582 | /* Uninstall the route from kernel. */ | |
0c555cc6 | 583 | void rib_uninstall_kernel(struct route_node *rn, struct route_entry *re) |
718e3744 | 584 | { |
d62a17ae | 585 | struct nexthop *nexthop; |
630d5962 | 586 | struct rib_table_info *info = srcdest_rnode_table_info(rn); |
d62a17ae | 587 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
05737783 | 588 | |
d62a17ae | 589 | if (info->safi != SAFI_UNICAST) { |
677c1dd5 | 590 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
c415d895 | 591 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
d6792f9d | 592 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
0c555cc6 | 593 | return; |
d62a17ae | 594 | } |
416ec78d | 595 | |
d62a17ae | 596 | /* |
597 | * Make sure we update the FPM any time we send new information to | |
97f5b441 | 598 | * the dataplane. |
d62a17ae | 599 | */ |
600 | hook_call(rib_update, rn, "uninstalling from kernel"); | |
97f5b441 MS |
601 | |
602 | switch (dplane_route_delete(rn, re)) { | |
ea1c14f6 | 603 | case ZEBRA_DPLANE_REQUEST_QUEUED: |
97f5b441 MS |
604 | if (zvrf) |
605 | zvrf->removals_queued++; | |
1e885672 | 606 | break; |
ea1c14f6 | 607 | case ZEBRA_DPLANE_REQUEST_FAILURE: |
97f5b441 MS |
608 | { |
609 | char str[SRCDEST2STR_BUFFER]; | |
610 | ||
611 | srcdest_rnode2str(rn, str, sizeof(str)); | |
612 | flog_err(EC_ZEBRA_DP_INSTALL_FAIL, | |
613 | "%u:%s: Failed to enqueue dataplane uninstall", | |
614 | re->vrf_id, str); | |
1e885672 | 615 | break; |
97f5b441 | 616 | } |
ea1c14f6 | 617 | case ZEBRA_DPLANE_REQUEST_SUCCESS: |
1e885672 DS |
618 | if (zvrf) |
619 | zvrf->removals++; | |
620 | break; | |
621 | } | |
718e3744 | 622 | |
0c555cc6 | 623 | return; |
718e3744 | 624 | } |
625 | ||
626 | /* Uninstall the route from kernel. */ | |
d62a17ae | 627 | static void rib_uninstall(struct route_node *rn, struct route_entry *re) |
718e3744 | 628 | { |
630d5962 | 629 | struct rib_table_info *info = srcdest_rnode_table_info(rn); |
5f7a4718 | 630 | rib_dest_t *dest = rib_dest_from_rnode(rn); |
97f5b441 | 631 | struct nexthop *nexthop; |
416ec78d | 632 | |
5f7a4718 | 633 | if (dest && dest->selected_fib == re) { |
d62a17ae | 634 | if (info->safi == SAFI_UNICAST) |
635 | hook_call(rib_update, rn, "rib_uninstall"); | |
5adc2528 | 636 | |
d62a17ae | 637 | /* If labeled-unicast route, uninstall transit LSP. */ |
638 | if (zebra_rib_labeled_unicast(re)) | |
639 | zebra_mpls_lsp_uninstall(info->zvrf, rn, re); | |
7cdb1a84 | 640 | |
3cdba47a | 641 | rib_uninstall_kernel(rn, re); |
97f5b441 MS |
642 | |
643 | dest->selected_fib = NULL; | |
644 | ||
efe6c026 MS |
645 | /* Free FIB nexthop group, if present */ |
646 | if (re->fib_ng.nexthop) { | |
647 | nexthops_free(re->fib_ng.nexthop); | |
648 | re->fib_ng.nexthop = NULL; | |
649 | } | |
7483dcbe | 650 | UNSET_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG); |
efe6c026 | 651 | |
c415d895 | 652 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
97f5b441 | 653 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
d62a17ae | 654 | } |
446bb95e | 655 | |
d62a17ae | 656 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { |
86391e56 MS |
657 | const struct prefix *p, *src_p; |
658 | ||
d62a17ae | 659 | srcdest_rnode_prefixes(rn, &p, &src_p); |
05737783 | 660 | |
40f321c0 | 661 | redistribute_delete(p, src_p, re, NULL); |
d62a17ae | 662 | UNSET_FLAG(re->flags, ZEBRA_FLAG_SELECTED); |
663 | } | |
718e3744 | 664 | } |
665 | ||
9fd92e3c AS |
666 | /* |
667 | * rib_can_delete_dest | |
668 | * | |
2951a7a4 | 669 | * Returns true if the given dest can be deleted from the table. |
9fd92e3c | 670 | */ |
d62a17ae | 671 | static int rib_can_delete_dest(rib_dest_t *dest) |
9fd92e3c | 672 | { |
045207e2 | 673 | if (re_list_first(&dest->routes)) { |
d62a17ae | 674 | return 0; |
675 | } | |
9fd92e3c | 676 | |
c86ba6c2 DS |
677 | /* |
678 | * Unresolved rnh's are stored on the default route's list | |
679 | * | |
680 | * dest->rnode can also be the source prefix node in an | |
681 | * ipv6 sourcedest table. Fortunately the prefix of a | |
682 | * source prefix node can never be the default prefix. | |
683 | */ | |
684 | if (is_default_prefix(&dest->rnode->p)) | |
685 | return 0; | |
686 | ||
d62a17ae | 687 | /* |
688 | * Don't delete the dest if we have to update the FPM about this | |
689 | * prefix. | |
690 | */ | |
691 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_FPM) | |
692 | || CHECK_FLAG(dest->flags, RIB_DEST_SENT_TO_FPM)) | |
693 | return 0; | |
5adc2528 | 694 | |
d62a17ae | 695 | return 1; |
9fd92e3c AS |
696 | } |
697 | ||
699dae23 DS |
698 | void zebra_rib_evaluate_rn_nexthops(struct route_node *rn, uint32_t seq) |
699 | { | |
700 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
699dae23 DS |
701 | struct rnh *rnh; |
702 | ||
703 | /* | |
50872b08 | 704 | * We are storing the rnh's associated withb |
699dae23 DS |
705 | * the tracked nexthop as a list of the rn's. |
706 | * Unresolved rnh's are placed at the top | |
707 | * of the tree list.( 0.0.0.0/0 for v4 and 0::0/0 for v6 ) | |
708 | * As such for each rn we need to walk up the tree | |
709 | * and see if any rnh's need to see if they | |
710 | * would match a more specific route | |
711 | */ | |
712 | while (rn) { | |
50872b08 DS |
713 | if (IS_ZEBRA_DEBUG_NHT_DETAILED) { |
714 | char buf[PREFIX_STRLEN]; | |
715 | ||
15569c58 DA |
716 | zlog_debug( |
717 | "%s: %s Being examined for Nexthop Tracking Count: %zd", | |
718 | __func__, | |
719 | srcdest_rnode2str(rn, buf, sizeof(buf)), | |
720 | dest ? rnh_list_count(&dest->nht) : 0); | |
50872b08 | 721 | } |
699dae23 DS |
722 | if (!dest) { |
723 | rn = rn->parent; | |
724 | if (rn) | |
725 | dest = rib_dest_from_rnode(rn); | |
726 | continue; | |
727 | } | |
728 | /* | |
729 | * If we have any rnh's stored in the nht list | |
730 | * then we know that this route node was used for | |
731 | * nht resolution and as such we need to call the | |
732 | * nexthop tracking evaluation code | |
733 | */ | |
739c9c90 | 734 | frr_each_safe(rnh_list, &dest->nht, rnh) { |
699dae23 DS |
735 | struct zebra_vrf *zvrf = |
736 | zebra_vrf_lookup_by_id(rnh->vrf_id); | |
737 | struct prefix *p = &rnh->node->p; | |
738 | ||
50872b08 | 739 | if (IS_ZEBRA_DEBUG_NHT_DETAILED) { |
699dae23 | 740 | char buf1[PREFIX_STRLEN]; |
699dae23 | 741 | |
bd47f3a3 | 742 | zlog_debug( |
2dbe669b | 743 | "%s(%u):%s has Nexthop(%pFX) Type: %s depending on it, evaluating %u:%u", |
bd47f3a3 JU |
744 | zvrf_name(zvrf), zvrf_id(zvrf), |
745 | srcdest_rnode2str(rn, buf1, | |
746 | sizeof(buf1)), | |
2dbe669b | 747 | p, rnh_type2str(rnh->type), seq, |
bd47f3a3 | 748 | rnh->seqno); |
699dae23 DS |
749 | } |
750 | ||
751 | /* | |
752 | * If we have evaluated this node on this pass | |
753 | * already, due to following the tree up | |
754 | * then we know that we can move onto the next | |
755 | * rnh to process. | |
756 | * | |
757 | * Additionally we call zebra_evaluate_rnh | |
758 | * when we gc the dest. In this case we know | |
759 | * that there must be no other re's where | |
760 | * we were originally as such we know that | |
761 | * that sequence number is ok to respect. | |
762 | */ | |
50872b08 DS |
763 | if (rnh->seqno == seq) { |
764 | if (IS_ZEBRA_DEBUG_NHT_DETAILED) | |
765 | zlog_debug( | |
1d5453d6 | 766 | " Node processed and moved already"); |
699dae23 | 767 | continue; |
50872b08 | 768 | } |
699dae23 DS |
769 | |
770 | rnh->seqno = seq; | |
771 | zebra_evaluate_rnh(zvrf, family2afi(p->family), 0, | |
772 | rnh->type, p); | |
773 | } | |
774 | ||
775 | rn = rn->parent; | |
776 | if (rn) | |
777 | dest = rib_dest_from_rnode(rn); | |
778 | } | |
779 | } | |
780 | ||
9fd92e3c AS |
781 | /* |
782 | * rib_gc_dest | |
783 | * | |
784 | * Garbage collect the rib dest corresponding to the given route node | |
785 | * if appropriate. | |
786 | * | |
2951a7a4 | 787 | * Returns true if the dest was deleted, false otherwise. |
9fd92e3c | 788 | */ |
d62a17ae | 789 | int rib_gc_dest(struct route_node *rn) |
9fd92e3c | 790 | { |
d62a17ae | 791 | rib_dest_t *dest; |
9fd92e3c | 792 | |
d62a17ae | 793 | dest = rib_dest_from_rnode(rn); |
794 | if (!dest) | |
795 | return 0; | |
9fd92e3c | 796 | |
d62a17ae | 797 | if (!rib_can_delete_dest(dest)) |
798 | return 0; | |
9fd92e3c | 799 | |
c9abf558 DS |
800 | if (IS_ZEBRA_DEBUG_RIB) { |
801 | struct zebra_vrf *zvrf; | |
802 | ||
803 | zvrf = rib_dest_vrf(dest); | |
d62a17ae | 804 | rnode_debug(rn, zvrf_id(zvrf), "removing dest from table"); |
c9abf558 | 805 | } |
9fd92e3c | 806 | |
699dae23 DS |
807 | zebra_rib_evaluate_rn_nexthops(rn, zebra_router_get_next_sequence()); |
808 | ||
d62a17ae | 809 | dest->rnode = NULL; |
aa57abfb | 810 | rnh_list_fini(&dest->nht); |
d62a17ae | 811 | XFREE(MTYPE_RIB_DEST, dest); |
812 | rn->info = NULL; | |
9fd92e3c | 813 | |
d62a17ae | 814 | /* |
815 | * Release the one reference that we keep on the route node. | |
816 | */ | |
817 | route_unlock_node(rn); | |
818 | return 1; | |
9fd92e3c AS |
819 | } |
820 | ||
224ccf29 DL |
821 | void zebra_rtable_node_cleanup(struct route_table *table, |
822 | struct route_node *node) | |
823 | { | |
824 | struct route_entry *re, *next; | |
825 | ||
826 | RNODE_FOREACH_RE_SAFE (node, re, next) { | |
827 | rib_unlink(node, re); | |
828 | } | |
829 | ||
830 | if (node->info) { | |
831 | rib_dest_t *dest = node->info; | |
832 | ||
833 | rnh_list_fini(&dest->nht); | |
834 | XFREE(MTYPE_RIB_DEST, node->info); | |
835 | } | |
836 | } | |
837 | ||
d62a17ae | 838 | static void rib_process_add_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
839 | struct route_entry *new) | |
3e5c6e00 | 840 | { |
d62a17ae | 841 | hook_call(rib_update, rn, "new route selected"); |
3e5c6e00 | 842 | |
d62a17ae | 843 | /* Update real nexthop. This may actually determine if nexthop is active |
844 | * or not. */ | |
c415d895 | 845 | if (!nexthop_group_active_nexthop_num(&(new->nhe->nhg))) { |
d62a17ae | 846 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
847 | return; | |
848 | } | |
3e5c6e00 | 849 | |
d62a17ae | 850 | if (IS_ZEBRA_DEBUG_RIB) { |
851 | char buf[SRCDEST2STR_BUFFER]; | |
852 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
c2c02b76 DS |
853 | zlog_debug("%s(%u:%u):%s: Adding route rn %p, re %p (%s)", |
854 | zvrf_name(zvrf), zvrf_id(zvrf), new->table, buf, rn, | |
855 | new, zebra_route_string(new->type)); | |
d62a17ae | 856 | } |
3e5c6e00 | 857 | |
d62a17ae | 858 | /* If labeled-unicast route, install transit LSP. */ |
859 | if (zebra_rib_labeled_unicast(new)) | |
860 | zebra_mpls_lsp_install(zvrf, rn, new); | |
a64448ba | 861 | |
3cdba47a | 862 | rib_install_kernel(rn, new, NULL); |
3e5c6e00 | 863 | |
d62a17ae | 864 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); |
3e5c6e00 | 865 | } |
866 | ||
d62a17ae | 867 | static void rib_process_del_fib(struct zebra_vrf *zvrf, struct route_node *rn, |
868 | struct route_entry *old) | |
3e5c6e00 | 869 | { |
d62a17ae | 870 | hook_call(rib_update, rn, "removing existing route"); |
3e5c6e00 | 871 | |
d62a17ae | 872 | /* Uninstall from kernel. */ |
873 | if (IS_ZEBRA_DEBUG_RIB) { | |
874 | char buf[SRCDEST2STR_BUFFER]; | |
875 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
c2c02b76 DS |
876 | zlog_debug("%s(%u:%u):%s: Deleting route rn %p, re %p (%s)", |
877 | zvrf_name(zvrf), zvrf_id(zvrf), old->table, buf, rn, | |
878 | old, zebra_route_string(old->type)); | |
d62a17ae | 879 | } |
3e5c6e00 | 880 | |
d62a17ae | 881 | /* If labeled-unicast route, uninstall transit LSP. */ |
882 | if (zebra_rib_labeled_unicast(old)) | |
883 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
884 | ||
3cdba47a | 885 | rib_uninstall_kernel(rn, old); |
d62a17ae | 886 | |
887 | /* Update nexthop for route, reset changed flag. */ | |
ef57f35f DL |
888 | /* Note: this code also handles the Linux case when an interface goes |
889 | * down, causing the kernel to delete routes without sending DELROUTE | |
890 | * notifications | |
891 | */ | |
6883bf8d | 892 | if (RIB_KERNEL_ROUTE(old)) |
212df1de PG |
893 | SET_FLAG(old->status, ROUTE_ENTRY_REMOVED); |
894 | else | |
895 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); | |
d62a17ae | 896 | } |
897 | ||
898 | static void rib_process_update_fib(struct zebra_vrf *zvrf, | |
899 | struct route_node *rn, | |
900 | struct route_entry *old, | |
901 | struct route_entry *new) | |
902 | { | |
d62a17ae | 903 | int nh_active = 0; |
d62a17ae | 904 | |
905 | /* | |
906 | * We have to install or update if a new route has been selected or | |
907 | * something has changed. | |
908 | */ | |
909 | if (new != old || CHECK_FLAG(new->status, ROUTE_ENTRY_CHANGED)) { | |
910 | hook_call(rib_update, rn, "updating existing route"); | |
911 | ||
912 | /* Update the nexthop; we could determine here that nexthop is | |
913 | * inactive. */ | |
c415d895 | 914 | if (nexthop_group_active_nexthop_num(&(new->nhe->nhg))) |
d62a17ae | 915 | nh_active = 1; |
916 | ||
917 | /* If nexthop is active, install the selected route, if | |
918 | * appropriate. If | |
919 | * the install succeeds, cleanup flags for prior route, if | |
920 | * different from | |
921 | * newly selected. | |
922 | */ | |
923 | if (nh_active) { | |
924 | if (IS_ZEBRA_DEBUG_RIB) { | |
925 | char buf[SRCDEST2STR_BUFFER]; | |
04bec7b2 | 926 | |
d62a17ae | 927 | srcdest_rnode2str(rn, buf, sizeof(buf)); |
928 | if (new != old) | |
929 | zlog_debug( | |
c2c02b76 | 930 | "%s(%u:%u):%s: Updating route rn %p, re %p (%s) old %p (%s)", |
bd47f3a3 | 931 | zvrf_name(zvrf), zvrf_id(zvrf), |
c2c02b76 | 932 | new->table, buf, rn, new, |
2da33d6b DS |
933 | zebra_route_string(new->type), |
934 | old, | |
935 | zebra_route_string(old->type)); | |
d62a17ae | 936 | else |
937 | zlog_debug( | |
c2c02b76 | 938 | "%s(%u:%u):%s: Updating route rn %p, re %p (%s)", |
bd47f3a3 | 939 | zvrf_name(zvrf), zvrf_id(zvrf), |
c2c02b76 | 940 | new->table, buf, rn, new, |
2da33d6b | 941 | zebra_route_string(new->type)); |
d62a17ae | 942 | } |
943 | ||
944 | /* If labeled-unicast route, uninstall transit LSP. */ | |
945 | if (zebra_rib_labeled_unicast(old)) | |
946 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
947 | ||
3cdba47a DS |
948 | /* |
949 | * Non-system route should be installed. | |
950 | * If labeled-unicast route, install transit | |
951 | * LSP. | |
952 | */ | |
953 | if (zebra_rib_labeled_unicast(new)) | |
954 | zebra_mpls_lsp_install(zvrf, rn, new); | |
d62a17ae | 955 | |
3cdba47a | 956 | rib_install_kernel(rn, new, old); |
d62a17ae | 957 | } |
a64448ba | 958 | |
d62a17ae | 959 | /* |
960 | * If nexthop for selected route is not active or install | |
961 | * failed, we | |
962 | * may need to uninstall and delete for redistribution. | |
963 | */ | |
ed216282 | 964 | if (!nh_active) { |
d62a17ae | 965 | if (IS_ZEBRA_DEBUG_RIB) { |
966 | char buf[SRCDEST2STR_BUFFER]; | |
967 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
968 | if (new != old) | |
969 | zlog_debug( | |
c2c02b76 | 970 | "%s(%u:%u):%s: Deleting route rn %p, re %p (%s) old %p (%s) - nexthop inactive", |
bd47f3a3 | 971 | zvrf_name(zvrf), zvrf_id(zvrf), |
c2c02b76 | 972 | new->table, buf, rn, new, |
2da33d6b DS |
973 | zebra_route_string(new->type), |
974 | old, | |
975 | zebra_route_string(old->type)); | |
d62a17ae | 976 | else |
977 | zlog_debug( | |
c2c02b76 | 978 | "%s(%u:%u):%s: Deleting route rn %p, re %p (%s) - nexthop inactive", |
bd47f3a3 | 979 | zvrf_name(zvrf), zvrf_id(zvrf), |
c2c02b76 | 980 | new->table, buf, rn, new, |
2da33d6b | 981 | zebra_route_string(new->type)); |
d62a17ae | 982 | } |
983 | ||
5c18e662 DS |
984 | /* |
985 | * When we have gotten to this point | |
986 | * the new route entry has no nexthops | |
987 | * that are usable and as such we need | |
988 | * to remove the old route, but only | |
989 | * if we were the one who installed | |
990 | * the old route | |
991 | */ | |
992 | if (!RIB_SYSTEM_ROUTE(old)) { | |
993 | /* If labeled-unicast route, uninstall transit | |
994 | * LSP. */ | |
995 | if (zebra_rib_labeled_unicast(old)) | |
996 | zebra_mpls_lsp_uninstall(zvrf, rn, old); | |
d62a17ae | 997 | |
5c18e662 DS |
998 | rib_uninstall_kernel(rn, old); |
999 | } | |
d62a17ae | 1000 | } |
1001 | } else { | |
1002 | /* | |
1003 | * Same route selected; check if in the FIB and if not, | |
3cdba47a DS |
1004 | * re-install. This is housekeeping code to deal with |
1005 | * race conditions in kernel with linux netlink reporting | |
1006 | * interface up before IPv4 or IPv6 protocol is ready | |
d62a17ae | 1007 | * to add routes. |
1008 | */ | |
3cdba47a DS |
1009 | if (!CHECK_FLAG(new->status, ROUTE_ENTRY_INSTALLED) || |
1010 | RIB_SYSTEM_ROUTE(new)) | |
677c1dd5 | 1011 | rib_install_kernel(rn, new, NULL); |
d62a17ae | 1012 | } |
1013 | ||
1014 | /* Update prior route. */ | |
6883bf8d | 1015 | if (new != old) |
d62a17ae | 1016 | UNSET_FLAG(old->status, ROUTE_ENTRY_CHANGED); |
3e5c6e00 | 1017 | |
d62a17ae | 1018 | /* Clear changed flag. */ |
1019 | UNSET_FLAG(new->status, ROUTE_ENTRY_CHANGED); | |
3e5c6e00 | 1020 | } |
1021 | ||
d62a17ae | 1022 | /* Check if 'alternate' RIB entry is better than 'current'. */ |
1023 | static struct route_entry *rib_choose_best(struct route_entry *current, | |
1024 | struct route_entry *alternate) | |
1025 | { | |
1026 | if (current == NULL) | |
1027 | return alternate; | |
1028 | ||
1029 | /* filter route selection in following order: | |
1030 | * - connected beats other types | |
fec4ca19 | 1031 | * - if both connected, loopback or vrf wins |
d62a17ae | 1032 | * - lower distance beats higher |
1033 | * - lower metric beats higher for equal distance | |
1034 | * - last, hence oldest, route wins tie break. | |
1035 | */ | |
1036 | ||
fec4ca19 DS |
1037 | /* Connected routes. Check to see if either are a vrf |
1038 | * or loopback interface. If not, pick the last connected | |
d62a17ae | 1039 | * route of the set of lowest metric connected routes. |
1040 | */ | |
1041 | if (alternate->type == ZEBRA_ROUTE_CONNECT) { | |
fec4ca19 DS |
1042 | if (current->type != ZEBRA_ROUTE_CONNECT) |
1043 | return alternate; | |
1044 | ||
1045 | /* both are connected. are either loop or vrf? */ | |
1046 | struct nexthop *nexthop = NULL; | |
1047 | ||
c415d895 | 1048 | for (ALL_NEXTHOPS(alternate->nhe->nhg, nexthop)) { |
873fde8c | 1049 | struct interface *ifp = if_lookup_by_index( |
1050 | nexthop->ifindex, alternate->vrf_id); | |
1051 | ||
1052 | if (ifp && if_is_loopback_or_vrf(ifp)) | |
fec4ca19 DS |
1053 | return alternate; |
1054 | } | |
1055 | ||
c415d895 | 1056 | for (ALL_NEXTHOPS(current->nhe->nhg, nexthop)) { |
873fde8c | 1057 | struct interface *ifp = if_lookup_by_index( |
1058 | nexthop->ifindex, current->vrf_id); | |
1059 | ||
1060 | if (ifp && if_is_loopback_or_vrf(ifp)) | |
fec4ca19 DS |
1061 | return current; |
1062 | } | |
1063 | ||
1064 | /* Neither are loop or vrf so pick best metric */ | |
1065 | if (alternate->metric <= current->metric) | |
d62a17ae | 1066 | return alternate; |
1067 | ||
1068 | return current; | |
1069 | } | |
3e5c6e00 | 1070 | |
d62a17ae | 1071 | if (current->type == ZEBRA_ROUTE_CONNECT) |
1072 | return current; | |
3e5c6e00 | 1073 | |
d62a17ae | 1074 | /* higher distance loses */ |
1075 | if (alternate->distance < current->distance) | |
1076 | return alternate; | |
1077 | if (current->distance < alternate->distance) | |
1078 | return current; | |
3e5c6e00 | 1079 | |
d62a17ae | 1080 | /* metric tie-breaks equal distance */ |
1081 | if (alternate->metric <= current->metric) | |
1082 | return alternate; | |
3e5c6e00 | 1083 | |
d62a17ae | 1084 | return current; |
3e5c6e00 | 1085 | } |
1086 | ||
d62a17ae | 1087 | /* Core function for processing routing information base. */ |
1088 | static void rib_process(struct route_node *rn) | |
1089 | { | |
1090 | struct route_entry *re; | |
1091 | struct route_entry *next; | |
1092 | struct route_entry *old_selected = NULL; | |
1093 | struct route_entry *new_selected = NULL; | |
1094 | struct route_entry *old_fib = NULL; | |
1095 | struct route_entry *new_fib = NULL; | |
1096 | struct route_entry *best = NULL; | |
1097 | char buf[SRCDEST2STR_BUFFER]; | |
1098 | rib_dest_t *dest; | |
1099 | struct zebra_vrf *zvrf = NULL; | |
bd47f3a3 | 1100 | struct vrf *vrf; |
86391e56 MS |
1101 | const struct prefix *p, *src_p; |
1102 | ||
d62a17ae | 1103 | srcdest_rnode_prefixes(rn, &p, &src_p); |
1104 | vrf_id_t vrf_id = VRF_UNKNOWN; | |
1105 | ||
1106 | assert(rn); | |
1107 | ||
1108 | dest = rib_dest_from_rnode(rn); | |
1109 | if (dest) { | |
1110 | zvrf = rib_dest_vrf(dest); | |
1111 | vrf_id = zvrf_id(zvrf); | |
1112 | } | |
bab85d4f | 1113 | |
bd47f3a3 JU |
1114 | vrf = vrf_lookup_by_id(vrf_id); |
1115 | ||
d62a17ae | 1116 | if (IS_ZEBRA_DEBUG_RIB) |
1117 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bab85d4f | 1118 | |
607425e5 DS |
1119 | /* |
1120 | * we can have rn's that have a NULL info pointer | |
1121 | * (dest). As such let's not let the deref happen | |
1122 | * additionally we know RNODE_FOREACH_RE_SAFE | |
1123 | * will not iterate so we are ok. | |
1124 | */ | |
f5158712 MS |
1125 | if (dest) { |
1126 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { | |
1127 | struct route_entry *re = re_list_first(&dest->routes); | |
1128 | ||
1129 | zlog_debug("%s(%u:%u):%s: Processing rn %p", | |
1130 | VRF_LOGNAME(vrf), vrf_id, re->table, buf, | |
1131 | rn); | |
1132 | } | |
1133 | ||
607425e5 | 1134 | old_fib = dest->selected_fib; |
f5158712 | 1135 | } |
5f7a4718 | 1136 | |
a2addae8 | 1137 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
61e6de9d DS |
1138 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { |
1139 | char flags_buf[128]; | |
1140 | char status_buf[128]; | |
1141 | ||
d62a17ae | 1142 | zlog_debug( |
61e6de9d | 1143 | "%s(%u:%u):%s: Examine re %p (%s) status: %sflags: %sdist %d metric %d", |
c2c02b76 | 1144 | VRF_LOGNAME(vrf), vrf_id, re->table, buf, re, |
61e6de9d DS |
1145 | zebra_route_string(re->type), |
1146 | _dump_re_status(re, status_buf, | |
1147 | sizeof(status_buf)), | |
1148 | zclient_dump_route_flags(re->flags, flags_buf, | |
1149 | sizeof(flags_buf)), | |
1150 | re->distance, re->metric); | |
1151 | } | |
d62a17ae | 1152 | |
d62a17ae | 1153 | /* Currently selected re. */ |
1154 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) { | |
1155 | assert(old_selected == NULL); | |
1156 | old_selected = re; | |
1157 | } | |
bab85d4f | 1158 | |
d62a17ae | 1159 | /* Skip deleted entries from selection */ |
1160 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
1161 | continue; | |
1162 | ||
9d221fac DS |
1163 | /* |
1164 | * If the route entry has changed, verify/resolve | |
1165 | * the nexthops associated with the entry. | |
1166 | * | |
1167 | * In any event if we have nexthops that are not active | |
1168 | * then we cannot use this particular route entry so | |
1169 | * skip it. | |
d62a17ae | 1170 | */ |
9d221fac DS |
1171 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_CHANGED)) { |
1172 | if (!nexthop_active_update(rn, re)) { | |
7e010c4b DS |
1173 | const struct prefix *p; |
1174 | struct rib_table_info *info; | |
1175 | ||
9d221fac DS |
1176 | if (re->type == ZEBRA_ROUTE_TABLE) { |
1177 | /* XXX: HERE BE DRAGONS!!!!! | |
1178 | * In all honesty, I have not yet | |
1179 | * figured out what this part does or | |
1180 | * why the ROUTE_ENTRY_CHANGED test | |
1181 | * above is correct or why we need to | |
1182 | * delete a route here, and also not | |
1183 | * whether this concerns both selected | |
1184 | * and fib route, or only selected | |
1185 | * or only fib | |
1186 | * | |
1187 | * This entry was denied by the 'ip | |
1188 | * protocol | |
1189 | * table' route-map, we need to delete | |
1190 | * it */ | |
1191 | if (re != old_selected) { | |
1192 | if (IS_ZEBRA_DEBUG_RIB) | |
1193 | zlog_debug( | |
1194 | "%s: %s(%u):%s: imported via import-table but denied by the ip protocol table route-map", | |
1195 | __func__, | |
1196 | VRF_LOGNAME( | |
1197 | vrf), | |
1198 | vrf_id, buf); | |
1199 | rib_unlink(rn, re); | |
1200 | } else | |
1201 | SET_FLAG(re->status, | |
1202 | ROUTE_ENTRY_REMOVED); | |
1203 | } | |
d62a17ae | 1204 | |
7e010c4b DS |
1205 | info = srcdest_rnode_table_info(rn); |
1206 | srcdest_rnode_prefixes(rn, &p, NULL); | |
1207 | zsend_route_notify_owner(re, p, | |
1208 | ZAPI_ROUTE_FAIL_INSTALL, | |
1209 | info->afi, info->safi); | |
9d221fac DS |
1210 | continue; |
1211 | } | |
1212 | } else { | |
1213 | /* | |
1214 | * If the re has not changed and the nhg we have is | |
1215 | * not usable, then we cannot use this route entry | |
1216 | * for consideration, as that the route will just | |
1217 | * not install if it is selected. | |
1218 | */ | |
1219 | if (!nexthop_group_active_nexthop_num(&re->nhe->nhg)) | |
1220 | continue; | |
d62a17ae | 1221 | } |
bab85d4f | 1222 | |
d62a17ae | 1223 | /* Infinite distance. */ |
3332f4f0 DS |
1224 | if (re->distance == DISTANCE_INFINITY && |
1225 | re->type != ZEBRA_ROUTE_KERNEL) { | |
d62a17ae | 1226 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); |
1227 | continue; | |
1228 | } | |
bab85d4f | 1229 | |
d62a17ae | 1230 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_FIB_OVERRIDE)) { |
1231 | best = rib_choose_best(new_fib, re); | |
1232 | if (new_fib && best != new_fib) | |
1233 | UNSET_FLAG(new_fib->status, | |
1234 | ROUTE_ENTRY_CHANGED); | |
1235 | new_fib = best; | |
1236 | } else { | |
1237 | best = rib_choose_best(new_selected, re); | |
1238 | if (new_selected && best != new_selected) | |
1239 | UNSET_FLAG(new_selected->status, | |
1240 | ROUTE_ENTRY_CHANGED); | |
1241 | new_selected = best; | |
1242 | } | |
1243 | if (best != re) | |
1244 | UNSET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
1245 | } /* RNODE_FOREACH_RE */ | |
1246 | ||
1247 | /* If no FIB override route, use the selected route also for FIB */ | |
1248 | if (new_fib == NULL) | |
1249 | new_fib = new_selected; | |
1250 | ||
1251 | /* After the cycle is finished, the following pointers will be set: | |
1252 | * old_selected --- RE entry currently having SELECTED | |
1253 | * new_selected --- RE entry that is newly SELECTED | |
1254 | * old_fib --- RE entry currently in kernel FIB | |
1255 | * new_fib --- RE entry that is newly to be in kernel FIB | |
1256 | * | |
1257 | * new_selected will get SELECTED flag, and is going to be redistributed | |
1258 | * the zclients. new_fib (which can be new_selected) will be installed | |
1259 | * in kernel. | |
1260 | */ | |
1261 | ||
1262 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { | |
c2c02b76 DS |
1263 | struct route_entry *entry; |
1264 | ||
1265 | entry = old_selected | |
1266 | ? old_selected | |
1267 | : new_selected | |
1268 | ? new_selected | |
1269 | : old_fib ? old_fib | |
1270 | : new_fib ? new_fib : NULL; | |
1271 | ||
d62a17ae | 1272 | zlog_debug( |
c2c02b76 DS |
1273 | "%s(%u:%u):%s: After processing: old_selected %p new_selected %p old_fib %p new_fib %p", |
1274 | VRF_LOGNAME(vrf), vrf_id, entry ? entry->table : 0, buf, | |
1275 | (void *)old_selected, (void *)new_selected, | |
1276 | (void *)old_fib, (void *)new_fib); | |
d62a17ae | 1277 | } |
446bb95e | 1278 | |
d62a17ae | 1279 | /* Buffer ROUTE_ENTRY_CHANGED here, because it will get cleared if |
1280 | * fib == selected */ | |
9d303b37 DL |
1281 | bool selected_changed = new_selected && CHECK_FLAG(new_selected->status, |
1282 | ROUTE_ENTRY_CHANGED); | |
d62a17ae | 1283 | |
1284 | /* Update fib according to selection results */ | |
1285 | if (new_fib && old_fib) | |
1286 | rib_process_update_fib(zvrf, rn, old_fib, new_fib); | |
1287 | else if (new_fib) | |
1288 | rib_process_add_fib(zvrf, rn, new_fib); | |
1289 | else if (old_fib) | |
1290 | rib_process_del_fib(zvrf, rn, old_fib); | |
1291 | ||
8cb41cd6 | 1292 | /* Update SELECTED entry */ |
d62a17ae | 1293 | if (old_selected != new_selected || selected_changed) { |
93bdadae | 1294 | |
6883bf8d | 1295 | if (new_selected && new_selected != new_fib) |
d62a17ae | 1296 | UNSET_FLAG(new_selected->status, ROUTE_ENTRY_CHANGED); |
41ec9222 | 1297 | |
3cdba47a | 1298 | if (new_selected) |
5af4b346 MS |
1299 | SET_FLAG(new_selected->flags, ZEBRA_FLAG_SELECTED); |
1300 | ||
d62a17ae | 1301 | if (old_selected) { |
40f321c0 MS |
1302 | /* |
1303 | * If we're removing the old entry, we should tell | |
1304 | * redist subscribers about that *if* they aren't | |
1305 | * going to see a redist for the new entry. | |
1306 | */ | |
1307 | if (!new_selected || CHECK_FLAG(old_selected->status, | |
1308 | ROUTE_ENTRY_REMOVED)) | |
1309 | redistribute_delete(p, src_p, | |
1310 | old_selected, | |
1311 | new_selected); | |
1312 | ||
d62a17ae | 1313 | if (old_selected != new_selected) |
1314 | UNSET_FLAG(old_selected->flags, | |
1315 | ZEBRA_FLAG_SELECTED); | |
f857321e | 1316 | } |
d62a17ae | 1317 | } |
3e5c6e00 | 1318 | |
d62a17ae | 1319 | /* Remove all RE entries queued for removal */ |
a2addae8 | 1320 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 1321 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { |
1322 | if (IS_ZEBRA_DEBUG_RIB) { | |
1323 | rnode_debug(rn, vrf_id, "rn %p, removing re %p", | |
1324 | (void *)rn, (void *)re); | |
1325 | } | |
1326 | rib_unlink(rn, re); | |
1327 | } | |
1328 | } | |
4d38fdb4 | 1329 | |
d62a17ae | 1330 | /* |
1331 | * Check if the dest can be deleted now. | |
1332 | */ | |
1333 | rib_gc_dest(rn); | |
e96f9203 DO |
1334 | } |
1335 | ||
a1494c25 DS |
1336 | static void zebra_rib_evaluate_mpls(struct route_node *rn) |
1337 | { | |
1338 | rib_dest_t *dest = rib_dest_from_rnode(rn); | |
1339 | struct zebra_vrf *zvrf = vrf_info_lookup(VRF_DEFAULT); | |
1340 | ||
1341 | if (!dest) | |
1342 | return; | |
1343 | ||
1344 | if (CHECK_FLAG(dest->flags, RIB_DEST_UPDATE_LSPS)) { | |
1345 | if (IS_ZEBRA_DEBUG_MPLS) | |
1346 | zlog_debug( | |
bd47f3a3 JU |
1347 | "%s(%u): Scheduling all LSPs upon RIB completion", |
1348 | zvrf_name(zvrf), zvrf_id(zvrf)); | |
a1494c25 DS |
1349 | zebra_mpls_lsp_schedule(zvrf); |
1350 | mpls_unmark_lsps_for_processing(rn); | |
1351 | } | |
1352 | } | |
1353 | ||
e5ac2adf MS |
1354 | /* |
1355 | * Utility to match route with dplane context data | |
1356 | */ | |
1357 | static bool rib_route_match_ctx(const struct route_entry *re, | |
25779064 MS |
1358 | const struct zebra_dplane_ctx *ctx, |
1359 | bool is_update) | |
e5ac2adf MS |
1360 | { |
1361 | bool result = false; | |
1362 | ||
1363 | if (is_update) { | |
1364 | /* | |
1365 | * In 'update' case, we test info about the 'previous' or | |
1366 | * 'old' route | |
1367 | */ | |
1368 | if ((re->type == dplane_ctx_get_old_type(ctx)) && | |
1369 | (re->instance == dplane_ctx_get_old_instance(ctx))) { | |
1370 | result = true; | |
1371 | ||
9db35a5e MS |
1372 | /* We use an extra test for statics, and another for |
1373 | * kernel routes. | |
e5ac2adf MS |
1374 | */ |
1375 | if (re->type == ZEBRA_ROUTE_STATIC && | |
1376 | (re->distance != dplane_ctx_get_old_distance(ctx) || | |
1377 | re->tag != dplane_ctx_get_old_tag(ctx))) { | |
1378 | result = false; | |
9db35a5e MS |
1379 | } else if (re->type == ZEBRA_ROUTE_KERNEL && |
1380 | re->metric != | |
1381 | dplane_ctx_get_old_metric(ctx)) { | |
1382 | result = false; | |
e5ac2adf MS |
1383 | } |
1384 | } | |
1385 | ||
1386 | } else { | |
1387 | /* | |
1388 | * Ordinary, single-route case using primary context info | |
1389 | */ | |
1390 | if ((dplane_ctx_get_op(ctx) != DPLANE_OP_ROUTE_DELETE) && | |
1391 | CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
1392 | /* Skip route that's been deleted */ | |
1393 | goto done; | |
1394 | } | |
1395 | ||
1396 | if ((re->type == dplane_ctx_get_type(ctx)) && | |
1397 | (re->instance == dplane_ctx_get_instance(ctx))) { | |
1398 | result = true; | |
1399 | ||
9db35a5e MS |
1400 | /* We use an extra test for statics, and another for |
1401 | * kernel routes. | |
e5ac2adf MS |
1402 | */ |
1403 | if (re->type == ZEBRA_ROUTE_STATIC && | |
1404 | (re->distance != dplane_ctx_get_distance(ctx) || | |
1405 | re->tag != dplane_ctx_get_tag(ctx))) { | |
1406 | result = false; | |
9db35a5e MS |
1407 | } else if (re->type == ZEBRA_ROUTE_KERNEL && |
1408 | re->metric != dplane_ctx_get_metric(ctx)) { | |
1409 | result = false; | |
1410 | } else if (re->type == ZEBRA_ROUTE_CONNECT) { | |
1411 | result = nexthop_group_equal_no_recurse( | |
1412 | &re->nhe->nhg, dplane_ctx_get_ng(ctx)); | |
e5ac2adf MS |
1413 | } |
1414 | } | |
1415 | } | |
1416 | ||
1417 | done: | |
1418 | ||
1419 | return (result); | |
1420 | } | |
1421 | ||
3cdba47a DS |
1422 | static void zebra_rib_fixup_system(struct route_node *rn) |
1423 | { | |
1424 | struct route_entry *re; | |
1425 | ||
1426 | RNODE_FOREACH_RE(rn, re) { | |
1427 | struct nexthop *nhop; | |
1428 | ||
1429 | if (!RIB_SYSTEM_ROUTE(re)) | |
1430 | continue; | |
1431 | ||
1432 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
1433 | continue; | |
1434 | ||
1435 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
6d0ee6a0 | 1436 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); |
3cdba47a | 1437 | |
c415d895 | 1438 | for (ALL_NEXTHOPS(re->nhe->nhg, nhop)) { |
3cdba47a DS |
1439 | if (CHECK_FLAG(nhop->flags, NEXTHOP_FLAG_RECURSIVE)) |
1440 | continue; | |
1441 | ||
1442 | SET_FLAG(nhop->flags, NEXTHOP_FLAG_FIB); | |
1443 | } | |
1444 | } | |
1445 | } | |
1446 | ||
9db35a5e MS |
1447 | /* Route comparison logic, with various special cases. */ |
1448 | static bool rib_compare_routes(const struct route_entry *re1, | |
1449 | const struct route_entry *re2) | |
1450 | { | |
9db35a5e MS |
1451 | if (re1->type != re2->type) |
1452 | return false; | |
1453 | ||
1454 | if (re1->instance != re2->instance) | |
1455 | return false; | |
1456 | ||
1457 | if (re1->type == ZEBRA_ROUTE_KERNEL && re1->metric != re2->metric) | |
1458 | return false; | |
1459 | ||
1460 | if (CHECK_FLAG(re1->flags, ZEBRA_FLAG_RR_USE_DISTANCE) && | |
1461 | re1->distance != re2->distance) | |
1462 | return false; | |
1463 | ||
87009d7d MS |
1464 | /* We support multiple connected routes: this supports multiple |
1465 | * v6 link-locals, and we also support multiple addresses in the same | |
1466 | * subnet on a single interface. | |
1467 | */ | |
9db35a5e MS |
1468 | if (re1->type != ZEBRA_ROUTE_CONNECT) |
1469 | return true; | |
1470 | ||
87009d7d | 1471 | return false; |
9db35a5e MS |
1472 | } |
1473 | ||
9959f1da MS |
1474 | /* |
1475 | * Compare nexthop lists from a route and a dplane context; test whether | |
1476 | * the list installed in the FIB matches the route's list. | |
1477 | * Set 'changed_p' to 'true' if there were changes to the route's | |
1478 | * installed nexthops. | |
1479 | * | |
1480 | * Return 'false' if any ACTIVE route nexthops are not mentioned in the FIB | |
1481 | * list. | |
1482 | */ | |
1483 | static bool rib_update_nhg_from_ctx(struct nexthop_group *re_nhg, | |
1484 | const struct nexthop_group *ctx_nhg, | |
1485 | bool *changed_p) | |
1486 | { | |
1487 | bool matched_p = true; | |
1488 | struct nexthop *nexthop, *ctx_nexthop; | |
1489 | ||
1490 | /* Get the first `installed` one to check against. | |
1491 | * If the dataplane doesn't set these to be what was actually installed, | |
1492 | * it will just be whatever was in re->nhe->nhg? | |
1493 | */ | |
1494 | ctx_nexthop = ctx_nhg->nexthop; | |
1495 | ||
1496 | if (CHECK_FLAG(ctx_nexthop->flags, NEXTHOP_FLAG_RECURSIVE) | |
1497 | || !CHECK_FLAG(ctx_nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1498 | ctx_nexthop = nexthop_next_active_resolved(ctx_nexthop); | |
1499 | ||
1500 | for (ALL_NEXTHOPS_PTR(re_nhg, nexthop)) { | |
1501 | ||
1502 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1503 | continue; | |
1504 | ||
1505 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1506 | continue; | |
1507 | ||
1508 | /* Check for a FIB nexthop corresponding to the RIB nexthop */ | |
7483dcbe | 1509 | if (!nexthop_same(ctx_nexthop, nexthop)) { |
9959f1da MS |
1510 | /* If the FIB doesn't know about the nexthop, |
1511 | * it's not installed | |
1512 | */ | |
1513 | if (IS_ZEBRA_DEBUG_RIB_DETAILED || | |
1514 | IS_ZEBRA_DEBUG_NHG_DETAIL) { | |
1515 | zlog_debug("%s: no ctx match for rib nh %pNHv %s", | |
1516 | __func__, nexthop, | |
1517 | (CHECK_FLAG(nexthop->flags, | |
1518 | NEXTHOP_FLAG_FIB) ? | |
1519 | "(FIB)":"")); | |
1520 | } | |
1521 | matched_p = false; | |
1522 | ||
1523 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1524 | *changed_p = true; | |
1525 | ||
1526 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1527 | ||
1528 | /* Keep checking nexthops */ | |
1529 | continue; | |
1530 | } | |
1531 | ||
1532 | if (CHECK_FLAG(ctx_nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
1533 | if (!CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
1534 | if (IS_ZEBRA_DEBUG_NHG_DETAIL) | |
1535 | zlog_debug("%s: rib nh %pNHv -> installed", | |
1536 | __func__, nexthop); | |
1537 | ||
1538 | *changed_p = true; | |
1539 | } | |
1540 | ||
1541 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1542 | } else { | |
1543 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
1544 | if (IS_ZEBRA_DEBUG_NHG_DETAIL) | |
1545 | zlog_debug("%s: rib nh %pNHv -> uninstalled", | |
1546 | __func__, nexthop); | |
1547 | ||
1548 | *changed_p = true; | |
1549 | } | |
1550 | ||
1551 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
1552 | } | |
1553 | ||
1554 | ctx_nexthop = nexthop_next_active_resolved(ctx_nexthop); | |
1555 | } | |
1556 | ||
1557 | return matched_p; | |
1558 | } | |
1559 | ||
e5ac2adf | 1560 | /* |
78bf56b0 MS |
1561 | * Update a route from a dplane context. This consolidates common code |
1562 | * that can be used in processing of results from FIB updates, and in | |
1563 | * async notification processing. | |
efe6c026 | 1564 | * The return is 'true' if the installed nexthops changed; 'false' otherwise. |
e5ac2adf | 1565 | */ |
efe6c026 MS |
1566 | static bool rib_update_re_from_ctx(struct route_entry *re, |
1567 | struct route_node *rn, | |
1568 | struct zebra_dplane_ctx *ctx) | |
78bf56b0 | 1569 | { |
9959f1da | 1570 | struct nexthop *nexthop; |
941e261c MS |
1571 | bool matched; |
1572 | const struct nexthop_group *ctxnhg; | |
9959f1da | 1573 | struct nexthop_group *re_nhg; |
efe6c026 MS |
1574 | bool is_selected = false; /* Is 're' currently the selected re? */ |
1575 | bool changed_p = false; /* Change to nexthops? */ | |
1576 | rib_dest_t *dest; | |
bd47f3a3 JU |
1577 | struct vrf *vrf; |
1578 | ||
1579 | vrf = vrf_lookup_by_id(re->vrf_id); | |
78bf56b0 | 1580 | |
efe6c026 MS |
1581 | dest = rib_dest_from_rnode(rn); |
1582 | if (dest) | |
1583 | is_selected = (re == dest->selected_fib); | |
1584 | ||
1585 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2919eea8 DS |
1586 | zlog_debug("update_from_ctx: %s(%u:%u):%pRN: %sSELECTED, re %p", |
1587 | VRF_LOGNAME(vrf), re->vrf_id, re->table, rn, | |
9db35a5e | 1588 | (is_selected ? "" : "NOT "), re); |
efe6c026 MS |
1589 | |
1590 | /* Update zebra's nexthop FIB flag for each nexthop that was installed. | |
941e261c | 1591 | * If the installed set differs from the set requested by the rib/owner, |
efe6c026 MS |
1592 | * we use the fib-specific nexthop-group to record the actual FIB |
1593 | * status. | |
78bf56b0 | 1594 | */ |
a126f120 MS |
1595 | matched = false; |
1596 | ctxnhg = dplane_ctx_get_ng(ctx); | |
941e261c | 1597 | |
9959f1da | 1598 | /* Check route's fib group and incoming notif group for equivalence. |
986a6617 SW |
1599 | * |
1600 | * Let's assume the nexthops are ordered here to save time. | |
941e261c | 1601 | */ |
9959f1da MS |
1602 | /* TODO -- this isn't testing or comparing the FIB flags; we should |
1603 | * do a more explicit loop, checking the incoming notification's flags. | |
1604 | */ | |
a126f120 MS |
1605 | if (re->fib_ng.nexthop && ctxnhg->nexthop && |
1606 | nexthop_group_equal(&re->fib_ng, ctxnhg)) | |
986a6617 | 1607 | matched = true; |
941e261c MS |
1608 | |
1609 | /* If the new FIB set matches the existing FIB set, we're done. */ | |
1610 | if (matched) { | |
1611 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 | 1612 | zlog_debug( |
2919eea8 DS |
1613 | "%s(%u:%u):%pRN update_from_ctx(): existing fib nhg, no change", |
1614 | VRF_LOGNAME(vrf), re->vrf_id, re->table, rn); | |
9959f1da | 1615 | goto check_backups; |
941e261c | 1616 | |
7483dcbe | 1617 | } else if (CHECK_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG)) { |
941e261c MS |
1618 | /* |
1619 | * Free stale fib list and move on to check the rib nhg. | |
1620 | */ | |
1621 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 | 1622 | zlog_debug( |
2919eea8 DS |
1623 | "%s(%u:%u):%pRN update_from_ctx(): replacing fib nhg", |
1624 | VRF_LOGNAME(vrf), re->vrf_id, re->table, rn); | |
941e261c MS |
1625 | nexthops_free(re->fib_ng.nexthop); |
1626 | re->fib_ng.nexthop = NULL; | |
efe6c026 | 1627 | |
7483dcbe MS |
1628 | UNSET_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG); |
1629 | ||
efe6c026 MS |
1630 | /* Note that the installed nexthops have changed */ |
1631 | changed_p = true; | |
941e261c MS |
1632 | } else { |
1633 | if (IS_ZEBRA_DEBUG_RIB) | |
2919eea8 DS |
1634 | zlog_debug( |
1635 | "%s(%u:%u):%pRN update_from_ctx(): no fib nhg", | |
1636 | VRF_LOGNAME(vrf), re->vrf_id, re->table, rn); | |
941e261c MS |
1637 | } |
1638 | ||
1639 | /* | |
1640 | * Compare with the rib nexthop group. The comparison here is different: | |
1641 | * the RIB group may be a superset of the list installed in the FIB. We | |
1642 | * walk the RIB group, looking for the 'installable' candidate | |
1643 | * nexthops, and then check those against the set | |
1644 | * that is actually installed. | |
986a6617 SW |
1645 | * |
1646 | * Assume nexthops are ordered here as well. | |
941e261c | 1647 | */ |
986a6617 | 1648 | |
9959f1da | 1649 | /* If nothing is installed, we can skip some of the checking/comparison |
1f6a5aca MS |
1650 | * of nexthops. |
1651 | */ | |
9959f1da | 1652 | if (ctxnhg->nexthop == NULL) { |
1f6a5aca MS |
1653 | changed_p = true; |
1654 | goto no_nexthops; | |
1655 | } | |
1656 | ||
9959f1da | 1657 | matched = rib_update_nhg_from_ctx(&(re->nhe->nhg), ctxnhg, &changed_p); |
78bf56b0 | 1658 | |
941e261c MS |
1659 | /* If all nexthops were processed, we're done */ |
1660 | if (matched) { | |
1661 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 | 1662 | zlog_debug( |
2919eea8 DS |
1663 | "%s(%u:%u):%pRN update_from_ctx(): rib nhg matched, changed '%s'", |
1664 | VRF_LOGNAME(vrf), re->vrf_id, re->table, rn, | |
1665 | (changed_p ? "true" : "false")); | |
9959f1da | 1666 | goto check_backups; |
941e261c | 1667 | } |
78bf56b0 | 1668 | |
1f6a5aca MS |
1669 | no_nexthops: |
1670 | ||
941e261c MS |
1671 | /* FIB nexthop set differs from the RIB set: |
1672 | * create a fib-specific nexthop-group | |
1673 | */ | |
1674 | if (IS_ZEBRA_DEBUG_RIB) | |
bd47f3a3 | 1675 | zlog_debug( |
2919eea8 DS |
1676 | "%s(%u:%u):%pRN update_from_ctx(): changed %s, adding new fib nhg%s", |
1677 | VRF_LOGNAME(vrf), re->vrf_id, re->table, rn, | |
7483dcbe MS |
1678 | (changed_p ? "true" : "false"), |
1679 | ctxnhg->nexthop != NULL ? "" : " (empty)"); | |
941e261c | 1680 | |
7483dcbe MS |
1681 | /* Set the flag about the dedicated fib list */ |
1682 | SET_FLAG(re->status, ROUTE_ENTRY_USE_FIB_NHG); | |
188a00e0 MS |
1683 | if (ctxnhg->nexthop) |
1684 | copy_nexthops(&(re->fib_ng.nexthop), ctxnhg->nexthop, NULL); | |
941e261c | 1685 | |
9959f1da MS |
1686 | check_backups: |
1687 | ||
1688 | /* | |
1689 | * Check the status of the route's backup nexthops, if any. | |
1690 | * The logic for backups is somewhat different: if any backup is | |
1691 | * installed, a new fib nhg will be attached to the route. | |
1692 | */ | |
1693 | re_nhg = zebra_nhg_get_backup_nhg(re->nhe); | |
1694 | if (re_nhg == NULL) | |
1695 | goto done; /* No backup nexthops */ | |
1696 | ||
1697 | /* First check the route's 'fib' list of backups, if it's present | |
1698 | * from some previous event. | |
1699 | */ | |
1700 | re_nhg = &re->fib_backup_ng; | |
1701 | ctxnhg = dplane_ctx_get_backup_ng(ctx); | |
1702 | ||
1703 | matched = false; | |
1704 | if (re_nhg->nexthop && ctxnhg && nexthop_group_equal(re_nhg, ctxnhg)) | |
1705 | matched = true; | |
1706 | ||
1707 | /* If the new FIB set matches an existing FIB set, we're done. */ | |
1708 | if (matched) { | |
1709 | if (IS_ZEBRA_DEBUG_RIB) | |
1710 | zlog_debug( | |
2919eea8 DS |
1711 | "%s(%u):%pRN update_from_ctx(): existing fib backup nhg, no change", |
1712 | VRF_LOGNAME(vrf), re->vrf_id, rn); | |
9959f1da MS |
1713 | goto done; |
1714 | ||
1715 | } else if (re->fib_backup_ng.nexthop) { | |
1716 | /* | |
1717 | * Free stale fib backup list and move on to check | |
1718 | * the route's backups. | |
1719 | */ | |
1720 | if (IS_ZEBRA_DEBUG_RIB) | |
1721 | zlog_debug( | |
2919eea8 DS |
1722 | "%s(%u):%pRN update_from_ctx(): replacing fib backup nhg", |
1723 | VRF_LOGNAME(vrf), re->vrf_id, rn); | |
9959f1da MS |
1724 | nexthops_free(re->fib_backup_ng.nexthop); |
1725 | re->fib_backup_ng.nexthop = NULL; | |
1726 | ||
1727 | /* Note that the installed nexthops have changed */ | |
1728 | changed_p = true; | |
1729 | } else { | |
1730 | if (IS_ZEBRA_DEBUG_RIB) | |
2919eea8 DS |
1731 | zlog_debug( |
1732 | "%s(%u):%pRN update_from_ctx(): no fib backup nhg", | |
1733 | VRF_LOGNAME(vrf), re->vrf_id, rn); | |
9959f1da MS |
1734 | } |
1735 | ||
1736 | /* | |
7483dcbe | 1737 | * If a FIB backup nexthop set exists, attach a copy |
9959f1da MS |
1738 | * to the route if any backup is installed |
1739 | */ | |
1740 | if (ctxnhg && ctxnhg->nexthop) { | |
1741 | ||
1742 | for (ALL_NEXTHOPS_PTR(ctxnhg, nexthop)) { | |
1743 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1744 | break; | |
1745 | } | |
1746 | ||
1747 | /* If no installed backups, we're done */ | |
1748 | if (nexthop == NULL) | |
1749 | goto done; | |
1750 | ||
1751 | if (IS_ZEBRA_DEBUG_RIB) | |
2919eea8 DS |
1752 | zlog_debug( |
1753 | "%s(%u):%pRN update_from_ctx(): changed %s, adding new backup fib nhg", | |
1754 | VRF_LOGNAME(vrf), re->vrf_id, rn, | |
1755 | (changed_p ? "true" : "false")); | |
9959f1da MS |
1756 | |
1757 | copy_nexthops(&(re->fib_backup_ng.nexthop), ctxnhg->nexthop, | |
1758 | NULL); | |
1759 | } | |
1760 | ||
941e261c | 1761 | done: |
9959f1da | 1762 | |
efe6c026 | 1763 | return changed_p; |
78bf56b0 MS |
1764 | } |
1765 | ||
e5ac2adf | 1766 | /* |
fad4d69c MS |
1767 | * Helper to locate a zebra route-node from a dplane context. This is used |
1768 | * when processing dplane results, e.g. Note well: the route-node is returned | |
1769 | * with a ref held - route_unlock_node() must be called eventually. | |
e5ac2adf | 1770 | */ |
fad4d69c MS |
1771 | static struct route_node * |
1772 | rib_find_rn_from_ctx(const struct zebra_dplane_ctx *ctx) | |
e5ac2adf MS |
1773 | { |
1774 | struct route_table *table = NULL; | |
1775 | struct route_node *rn = NULL; | |
e5ac2adf MS |
1776 | const struct prefix *dest_pfx, *src_pfx; |
1777 | ||
1778 | /* Locate rn and re(s) from ctx */ | |
1779 | ||
c7c0b007 SW |
1780 | table = zebra_vrf_lookup_table_with_table_id( |
1781 | dplane_ctx_get_afi(ctx), dplane_ctx_get_safi(ctx), | |
1782 | dplane_ctx_get_vrf(ctx), dplane_ctx_get_table(ctx)); | |
e5ac2adf MS |
1783 | if (table == NULL) { |
1784 | if (IS_ZEBRA_DEBUG_DPLANE) { | |
bd47f3a3 JU |
1785 | zlog_debug( |
1786 | "Failed to find route for ctx: no table for afi %d, safi %d, vrf %s(%u)", | |
1787 | dplane_ctx_get_afi(ctx), | |
1788 | dplane_ctx_get_safi(ctx), | |
1789 | vrf_id_to_name(dplane_ctx_get_vrf(ctx)), | |
1790 | dplane_ctx_get_vrf(ctx)); | |
e5ac2adf MS |
1791 | } |
1792 | goto done; | |
1793 | } | |
1794 | ||
fad4d69c MS |
1795 | dest_pfx = dplane_ctx_get_dest(ctx); |
1796 | src_pfx = dplane_ctx_get_src(ctx); | |
1797 | ||
1798 | rn = srcdest_rnode_get(table, dest_pfx, | |
1799 | src_pfx ? (struct prefix_ipv6 *)src_pfx : NULL); | |
1800 | ||
1801 | done: | |
1802 | return rn; | |
1803 | } | |
1804 | ||
1805 | ||
97f5b441 | 1806 | |
fad4d69c MS |
1807 | /* |
1808 | * Route-update results processing after async dataplane update. | |
1809 | */ | |
1810 | static void rib_process_result(struct zebra_dplane_ctx *ctx) | |
1811 | { | |
1812 | struct zebra_vrf *zvrf = NULL; | |
bd47f3a3 | 1813 | struct vrf *vrf; |
fad4d69c MS |
1814 | struct route_node *rn = NULL; |
1815 | struct route_entry *re = NULL, *old_re = NULL, *rib; | |
1816 | bool is_update = false; | |
fad4d69c MS |
1817 | enum dplane_op_e op; |
1818 | enum zebra_dplane_result status; | |
1819 | const struct prefix *dest_pfx, *src_pfx; | |
1820 | uint32_t seq; | |
9db35a5e | 1821 | rib_dest_t *dest; |
efe6c026 | 1822 | bool fib_changed = false; |
77b38a4a | 1823 | struct rib_table_info *info; |
97f5b441 | 1824 | |
fad4d69c | 1825 | zvrf = vrf_info_lookup(dplane_ctx_get_vrf(ctx)); |
bd47f3a3 | 1826 | vrf = vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); |
e5ac2adf MS |
1827 | dest_pfx = dplane_ctx_get_dest(ctx); |
1828 | ||
fad4d69c MS |
1829 | /* Locate rn and re(s) from ctx */ |
1830 | rn = rib_find_rn_from_ctx(ctx); | |
e5ac2adf MS |
1831 | if (rn == NULL) { |
1832 | if (IS_ZEBRA_DEBUG_DPLANE) { | |
bd47f3a3 | 1833 | zlog_debug( |
2919eea8 | 1834 | "Failed to process dplane results: no route for %s(%u):%pFX", |
bd47f3a3 | 1835 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 1836 | dest_pfx); |
e5ac2adf MS |
1837 | } |
1838 | goto done; | |
1839 | } | |
1840 | ||
9db35a5e | 1841 | dest = rib_dest_from_rnode(rn); |
e5ac2adf | 1842 | srcdest_rnode_prefixes(rn, &dest_pfx, &src_pfx); |
77b38a4a | 1843 | info = srcdest_rnode_table_info(rn); |
e5ac2adf MS |
1844 | |
1845 | op = dplane_ctx_get_op(ctx); | |
1846 | status = dplane_ctx_get_status(ctx); | |
1847 | ||
c831033f | 1848 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) |
bd47f3a3 | 1849 | zlog_debug( |
2919eea8 | 1850 | "%s(%u:%u):%pFX Processing dplane result ctx %p, op %s result %s", |
c2c02b76 | 1851 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 1852 | dplane_ctx_get_table(ctx), dest_pfx, ctx, |
c2c02b76 | 1853 | dplane_op2str(op), dplane_res2str(status)); |
e5ac2adf | 1854 | |
e5ac2adf MS |
1855 | /* |
1856 | * Update is a bit of a special case, where we may have both old and new | |
1857 | * routes to post-process. | |
1858 | */ | |
1859 | is_update = dplane_ctx_is_update(ctx); | |
1860 | ||
1861 | /* | |
1862 | * Take a pass through the routes, look for matches with the context | |
1863 | * info. | |
1864 | */ | |
1865 | RNODE_FOREACH_RE(rn, rib) { | |
1866 | ||
1867 | if (re == NULL) { | |
5709131c | 1868 | if (rib_route_match_ctx(rib, ctx, false)) |
e5ac2adf | 1869 | re = rib; |
e5ac2adf MS |
1870 | } |
1871 | ||
1872 | /* Check for old route match */ | |
1873 | if (is_update && (old_re == NULL)) { | |
5709131c | 1874 | if (rib_route_match_ctx(rib, ctx, true /*is_update*/)) |
e5ac2adf | 1875 | old_re = rib; |
e5ac2adf MS |
1876 | } |
1877 | ||
1878 | /* Have we found the routes we need to work on? */ | |
5709131c | 1879 | if (re && ((!is_update || old_re))) |
e5ac2adf | 1880 | break; |
e5ac2adf MS |
1881 | } |
1882 | ||
699dae23 DS |
1883 | seq = dplane_ctx_get_seq(ctx); |
1884 | ||
e5ac2adf MS |
1885 | /* |
1886 | * Check sequence number(s) to detect stale results before continuing | |
1887 | */ | |
60f98b23 | 1888 | if (re) { |
699dae23 | 1889 | if (re->dplane_sequence != seq) { |
60f98b23 | 1890 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) |
bd47f3a3 | 1891 | zlog_debug( |
2919eea8 | 1892 | "%s(%u):%pFX Stale dplane result for re %p", |
bd47f3a3 | 1893 | VRF_LOGNAME(vrf), |
2919eea8 | 1894 | dplane_ctx_get_vrf(ctx), dest_pfx, re); |
e4876266 DS |
1895 | } else { |
1896 | if (!zrouter.asic_offloaded || | |
1897 | (CHECK_FLAG(re->flags, ZEBRA_FLAG_OFFLOADED) || | |
1898 | CHECK_FLAG(re->flags, ZEBRA_FLAG_OFFLOAD_FAILED))) | |
1899 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); | |
1900 | } | |
e5ac2adf MS |
1901 | } |
1902 | ||
60f98b23 DS |
1903 | if (old_re) { |
1904 | if (old_re->dplane_sequence != dplane_ctx_get_old_seq(ctx)) { | |
1905 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) | |
bd47f3a3 | 1906 | zlog_debug( |
2919eea8 | 1907 | "%s(%u:%u):%pFX Stale dplane result for old_re %p", |
bd47f3a3 | 1908 | VRF_LOGNAME(vrf), |
c2c02b76 | 1909 | dplane_ctx_get_vrf(ctx), old_re->table, |
2919eea8 | 1910 | dest_pfx, old_re); |
60f98b23 | 1911 | } else |
9ef0c6ba | 1912 | UNSET_FLAG(old_re->status, ROUTE_ENTRY_QUEUED); |
e5ac2adf MS |
1913 | } |
1914 | ||
12e7fe3a | 1915 | switch (op) { |
12e7fe3a DS |
1916 | case DPLANE_OP_ROUTE_INSTALL: |
1917 | case DPLANE_OP_ROUTE_UPDATE: | |
1918 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
677c1dd5 DS |
1919 | if (re) { |
1920 | UNSET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
1921 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
1922 | } | |
b9f0e5ee DS |
1923 | /* |
1924 | * On an update operation from the same route type | |
1925 | * context retrieval currently has no way to know | |
1926 | * which was the old and which was the new. | |
1927 | * So don't unset our flags that we just set. | |
1928 | * We know redistribution is ok because the | |
1929 | * old_re in this case is used for nothing | |
1930 | * more than knowing whom to contact if necessary. | |
1931 | */ | |
1932 | if (old_re && old_re != re) { | |
677c1dd5 DS |
1933 | UNSET_FLAG(old_re->status, ROUTE_ENTRY_FAILED); |
1934 | UNSET_FLAG(old_re->status, | |
1935 | ROUTE_ENTRY_INSTALLED); | |
1936 | } | |
f183e380 | 1937 | |
78bf56b0 | 1938 | /* Update zebra route based on the results in |
941e261c | 1939 | * the context struct. |
78bf56b0 | 1940 | */ |
941e261c | 1941 | if (re) { |
efe6c026 MS |
1942 | fib_changed = |
1943 | rib_update_re_from_ctx(re, rn, ctx); | |
1944 | ||
1945 | if (!fib_changed) { | |
1946 | if (IS_ZEBRA_DEBUG_DPLANE_DETAIL) | |
bd47f3a3 | 1947 | zlog_debug( |
2919eea8 | 1948 | "%s(%u:%u):%pFX no fib change for re", |
bd47f3a3 JU |
1949 | VRF_LOGNAME(vrf), |
1950 | dplane_ctx_get_vrf(ctx), | |
c2c02b76 DS |
1951 | dplane_ctx_get_table( |
1952 | ctx), | |
2919eea8 | 1953 | dest_pfx); |
12e7fe3a DS |
1954 | } |
1955 | ||
9db35a5e MS |
1956 | /* Redistribute if this is the selected re */ |
1957 | if (dest && re == dest->selected_fib) | |
1958 | redistribute_update(dest_pfx, src_pfx, | |
1959 | re, old_re); | |
f183e380 MS |
1960 | } |
1961 | ||
3cdba47a DS |
1962 | /* |
1963 | * System routes are weird in that they | |
1964 | * allow multiple to be installed that match | |
1965 | * to the same prefix, so after we get the | |
1966 | * result we need to clean them up so that | |
1967 | * we can actually use them. | |
1968 | */ | |
1969 | if ((re && RIB_SYSTEM_ROUTE(re)) || | |
1970 | (old_re && RIB_SYSTEM_ROUTE(old_re))) | |
1971 | zebra_rib_fixup_system(rn); | |
1972 | ||
f4c6e2a8 | 1973 | if (zvrf) |
12e7fe3a | 1974 | zvrf->installs++; |
f183e380 | 1975 | |
12e7fe3a | 1976 | /* Notify route owner */ |
e4876266 DS |
1977 | if (zebra_router_notify_on_ack()) |
1978 | zsend_route_notify_owner_ctx(ctx, ZAPI_ROUTE_INSTALLED); | |
1979 | else { | |
1980 | if (re) { | |
1981 | if (CHECK_FLAG(re->flags, | |
1982 | ZEBRA_FLAG_OFFLOADED)) | |
1983 | zsend_route_notify_owner_ctx( | |
1984 | ctx, | |
1985 | ZAPI_ROUTE_INSTALLED); | |
1986 | if (CHECK_FLAG( | |
1987 | re->flags, | |
1988 | ZEBRA_FLAG_OFFLOAD_FAILED)) | |
1989 | zsend_route_notify_owner_ctx( | |
1990 | ctx, | |
1991 | ZAPI_ROUTE_FAIL_INSTALL); | |
1992 | } | |
1993 | } | |
12e7fe3a | 1994 | } else { |
7a230a9d | 1995 | if (re) { |
677c1dd5 | 1996 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); |
7a230a9d DS |
1997 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
1998 | } if (old_re) | |
677c1dd5 DS |
1999 | SET_FLAG(old_re->status, ROUTE_ENTRY_FAILED); |
2000 | if (re) | |
2001 | zsend_route_notify_owner(re, dest_pfx, | |
77b38a4a S |
2002 | ZAPI_ROUTE_FAIL_INSTALL, |
2003 | info->afi, info->safi); | |
97f5b441 | 2004 | |
2dbe669b | 2005 | zlog_warn("%s(%u:%u):%pFX: Route install failed", |
bd47f3a3 | 2006 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2dbe669b | 2007 | dplane_ctx_get_table(ctx), dest_pfx); |
12e7fe3a DS |
2008 | } |
2009 | break; | |
2010 | case DPLANE_OP_ROUTE_DELETE: | |
677c1dd5 DS |
2011 | if (re) |
2012 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
12e7fe3a DS |
2013 | /* |
2014 | * In the delete case, the zebra core datastructs were | |
2015 | * updated (or removed) at the time the delete was issued, | |
2016 | * so we're just notifying the route owner. | |
e5ac2adf | 2017 | */ |
12e7fe3a | 2018 | if (status == ZEBRA_DPLANE_REQUEST_SUCCESS) { |
677c1dd5 DS |
2019 | if (re) { |
2020 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
2021 | UNSET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
2022 | } | |
12e7fe3a | 2023 | zsend_route_notify_owner_ctx(ctx, ZAPI_ROUTE_REMOVED); |
e5ac2adf | 2024 | |
12e7fe3a DS |
2025 | if (zvrf) |
2026 | zvrf->removals++; | |
2027 | } else { | |
677c1dd5 DS |
2028 | if (re) |
2029 | SET_FLAG(re->status, ROUTE_ENTRY_FAILED); | |
12e7fe3a DS |
2030 | zsend_route_notify_owner_ctx(ctx, |
2031 | ZAPI_ROUTE_REMOVE_FAIL); | |
e5ac2adf | 2032 | |
2dbe669b | 2033 | zlog_warn("%s(%u:%u):%pFX: Route Deletion failure", |
bd47f3a3 | 2034 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2dbe669b | 2035 | dplane_ctx_get_table(ctx), dest_pfx); |
12e7fe3a | 2036 | } |
3cdba47a DS |
2037 | |
2038 | /* | |
2039 | * System routes are weird in that they | |
2040 | * allow multiple to be installed that match | |
2041 | * to the same prefix, so after we get the | |
2042 | * result we need to clean them up so that | |
2043 | * we can actually use them. | |
2044 | */ | |
2045 | if ((re && RIB_SYSTEM_ROUTE(re)) || | |
2046 | (old_re && RIB_SYSTEM_ROUTE(old_re))) | |
2047 | zebra_rib_fixup_system(rn); | |
12e7fe3a | 2048 | break; |
d37f4d6c MS |
2049 | default: |
2050 | break; | |
e5ac2adf | 2051 | } |
699dae23 DS |
2052 | |
2053 | zebra_rib_evaluate_rn_nexthops(rn, seq); | |
a1494c25 | 2054 | zebra_rib_evaluate_mpls(rn); |
e5ac2adf MS |
2055 | done: |
2056 | ||
5f27bcba DS |
2057 | if (rn) |
2058 | route_unlock_node(rn); | |
2059 | ||
e5ac2adf MS |
2060 | /* Return context to dataplane module */ |
2061 | dplane_ctx_fini(&ctx); | |
2062 | } | |
2063 | ||
9959f1da MS |
2064 | /* |
2065 | * Count installed/FIB nexthops | |
2066 | */ | |
2067 | static int rib_count_installed_nh(struct route_entry *re) | |
2068 | { | |
2069 | int count = 0; | |
2070 | struct nexthop *nexthop; | |
2071 | struct nexthop_group *nhg; | |
2072 | ||
2073 | nhg = rib_get_fib_nhg(re); | |
2074 | ||
2075 | for (ALL_NEXTHOPS_PTR(nhg, nexthop)) { | |
2076 | /* The meaningful flag depends on where the installed | |
2077 | * nexthops reside. | |
2078 | */ | |
43a9f66c | 2079 | if (nhg == &(re->fib_ng)) { |
9959f1da MS |
2080 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) |
2081 | count++; | |
2082 | } else { | |
2083 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
2084 | count++; | |
2085 | } | |
2086 | } | |
2087 | ||
43a9f66c MS |
2088 | nhg = rib_get_fib_backup_nhg(re); |
2089 | if (nhg) { | |
2090 | for (ALL_NEXTHOPS_PTR(nhg, nexthop)) { | |
2091 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
2092 | count++; | |
2093 | } | |
9959f1da MS |
2094 | } |
2095 | ||
2096 | return count; | |
2097 | } | |
2098 | ||
54818e3b MS |
2099 | /* |
2100 | * Handle notification from async dataplane: the dataplane has detected | |
2101 | * some change to a route, and notifies zebra so that the control plane | |
2102 | * can reflect that change. | |
2103 | */ | |
2104 | static void rib_process_dplane_notify(struct zebra_dplane_ctx *ctx) | |
2105 | { | |
2106 | struct route_node *rn = NULL; | |
efe6c026 | 2107 | struct route_entry *re = NULL; |
bd47f3a3 | 2108 | struct vrf *vrf; |
efe6c026 | 2109 | struct nexthop *nexthop; |
54818e3b | 2110 | const struct prefix *dest_pfx, *src_pfx; |
941e261c | 2111 | rib_dest_t *dest; |
efe6c026 | 2112 | bool fib_changed = false; |
941e261c | 2113 | bool debug_p = IS_ZEBRA_DEBUG_DPLANE | IS_ZEBRA_DEBUG_RIB; |
efe6c026 | 2114 | int start_count, end_count; |
54818e3b | 2115 | dest_pfx = dplane_ctx_get_dest(ctx); |
bd47f3a3 | 2116 | vrf = vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); |
54818e3b | 2117 | |
54818e3b MS |
2118 | /* Locate rn and re(s) from ctx */ |
2119 | rn = rib_find_rn_from_ctx(ctx); | |
2120 | if (rn == NULL) { | |
941e261c | 2121 | if (debug_p) { |
bd47f3a3 | 2122 | zlog_debug( |
2919eea8 | 2123 | "Failed to process dplane notification: no routes for %s(%u:%u):%pFX", |
bd47f3a3 | 2124 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2125 | dplane_ctx_get_table(ctx), dest_pfx); |
54818e3b MS |
2126 | } |
2127 | goto done; | |
2128 | } | |
2129 | ||
941e261c | 2130 | dest = rib_dest_from_rnode(rn); |
54818e3b MS |
2131 | srcdest_rnode_prefixes(rn, &dest_pfx, &src_pfx); |
2132 | ||
efe6c026 | 2133 | if (debug_p) |
2919eea8 | 2134 | zlog_debug("%s(%u:%u):%pFX Processing dplane notif ctx %p", |
c2c02b76 | 2135 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2136 | dplane_ctx_get_table(ctx), dest_pfx, ctx); |
54818e3b MS |
2137 | |
2138 | /* | |
2139 | * Take a pass through the routes, look for matches with the context | |
2140 | * info. | |
2141 | */ | |
efe6c026 MS |
2142 | RNODE_FOREACH_RE(rn, re) { |
2143 | if (rib_route_match_ctx(re, ctx, false /*!update*/)) | |
54818e3b MS |
2144 | break; |
2145 | } | |
2146 | ||
2147 | /* No match? Nothing we can do */ | |
2148 | if (re == NULL) { | |
941e261c | 2149 | if (debug_p) |
bd47f3a3 | 2150 | zlog_debug( |
2919eea8 | 2151 | "%s(%u:%u):%pFX Unable to process dplane notification: no entry for type %s", |
bd47f3a3 | 2152 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2153 | dplane_ctx_get_table(ctx), dest_pfx, |
bd47f3a3 | 2154 | zebra_route_string(dplane_ctx_get_type(ctx))); |
54818e3b MS |
2155 | |
2156 | goto done; | |
2157 | } | |
2158 | ||
272e8903 | 2159 | /* Ensure we clear the QUEUED flag */ |
e4876266 DS |
2160 | if (!zrouter.asic_offloaded) |
2161 | UNSET_FLAG(re->status, ROUTE_ENTRY_QUEUED); | |
272e8903 | 2162 | |
4c0b5436 MS |
2163 | /* Is this a notification that ... matters? We mostly care about |
2164 | * the route that is currently selected for installation; we may also | |
2165 | * get an un-install notification, and handle that too. | |
941e261c MS |
2166 | */ |
2167 | if (re != dest->selected_fib) { | |
4c0b5436 MS |
2168 | /* |
2169 | * If we need to, clean up after a delete that was part of | |
2170 | * an update operation. | |
941e261c | 2171 | */ |
4c0b5436 MS |
2172 | end_count = 0; |
2173 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2174 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
2175 | end_count++; | |
2176 | } | |
2177 | ||
2178 | /* If no nexthops or none installed, ensure that this re | |
2179 | * gets its 'installed' flag cleared. | |
2180 | */ | |
2181 | if (end_count == 0) { | |
2182 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED)) | |
2183 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
2184 | if (debug_p) | |
bd47f3a3 | 2185 | zlog_debug( |
2919eea8 | 2186 | "%s(%u:%u):%pFX dplane notif, uninstalled type %s route", |
bd47f3a3 | 2187 | VRF_LOGNAME(vrf), |
c2c02b76 | 2188 | dplane_ctx_get_vrf(ctx), |
2919eea8 | 2189 | dplane_ctx_get_table(ctx), dest_pfx, |
bd47f3a3 JU |
2190 | zebra_route_string( |
2191 | dplane_ctx_get_type(ctx))); | |
4c0b5436 MS |
2192 | } else { |
2193 | /* At least report on the event. */ | |
2194 | if (debug_p) | |
bd47f3a3 | 2195 | zlog_debug( |
2919eea8 | 2196 | "%s(%u:%u):%pFX dplane notif, but type %s not selected_fib", |
bd47f3a3 | 2197 | VRF_LOGNAME(vrf), |
c2c02b76 | 2198 | dplane_ctx_get_vrf(ctx), |
2919eea8 | 2199 | dplane_ctx_get_table(ctx), dest_pfx, |
bd47f3a3 JU |
2200 | zebra_route_string( |
2201 | dplane_ctx_get_type(ctx))); | |
4c0b5436 | 2202 | } |
941e261c MS |
2203 | goto done; |
2204 | } | |
2205 | ||
efe6c026 MS |
2206 | /* We'll want to determine whether the installation status of the |
2207 | * route has changed: we'll check the status before processing, | |
2208 | * and then again if there's been a change. | |
2209 | */ | |
2210 | start_count = 0; | |
1c30d64b | 2211 | |
9959f1da MS |
2212 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED)) |
2213 | start_count = rib_count_installed_nh(re); | |
efe6c026 | 2214 | |
54818e3b MS |
2215 | /* Update zebra's nexthop FIB flags based on the context struct's |
2216 | * nexthops. | |
2217 | */ | |
efe6c026 | 2218 | fib_changed = rib_update_re_from_ctx(re, rn, ctx); |
54818e3b | 2219 | |
efe6c026 MS |
2220 | if (!fib_changed) { |
2221 | if (debug_p) | |
bd47f3a3 | 2222 | zlog_debug( |
2919eea8 | 2223 | "%s(%u:%u):%pFX dplane notification: rib_update returns FALSE", |
bd47f3a3 | 2224 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2225 | dplane_ctx_get_table(ctx), dest_pfx); |
54818e3b MS |
2226 | } |
2227 | ||
188a00e0 MS |
2228 | /* |
2229 | * Perform follow-up work if the actual status of the prefix | |
efe6c026 | 2230 | * changed. |
941e261c | 2231 | */ |
9959f1da | 2232 | end_count = rib_count_installed_nh(re); |
941e261c | 2233 | |
188a00e0 MS |
2234 | /* Various fib transitions: changed nexthops; from installed to |
2235 | * not-installed; or not-installed to installed. | |
efe6c026 | 2236 | */ |
188a00e0 | 2237 | if (start_count > 0 && end_count > 0) { |
11260e70 | 2238 | if (debug_p) |
bd47f3a3 | 2239 | zlog_debug( |
2919eea8 | 2240 | "%s(%u:%u):%pFX applied nexthop changes from dplane notification", |
bd47f3a3 | 2241 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2242 | dplane_ctx_get_table(ctx), dest_pfx); |
188a00e0 MS |
2243 | |
2244 | /* Changed nexthops - update kernel/others */ | |
2245 | dplane_route_notif_update(rn, re, | |
2246 | DPLANE_OP_ROUTE_UPDATE, ctx); | |
2247 | ||
2248 | } else if (start_count == 0 && end_count > 0) { | |
efe6c026 | 2249 | if (debug_p) |
bd47f3a3 | 2250 | zlog_debug( |
2919eea8 | 2251 | "%s(%u:%u):%pFX installed transition from dplane notification", |
bd47f3a3 | 2252 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2253 | dplane_ctx_get_table(ctx), dest_pfx); |
efe6c026 MS |
2254 | |
2255 | /* We expect this to be the selected route, so we want | |
272e8903 | 2256 | * to tell others about this transition. |
efe6c026 MS |
2257 | */ |
2258 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
2259 | ||
188a00e0 | 2260 | /* Changed nexthops - update kernel/others */ |
9959f1da | 2261 | dplane_route_notif_update(rn, re, DPLANE_OP_ROUTE_UPDATE, ctx); |
188a00e0 | 2262 | |
efe6c026 MS |
2263 | /* Redistribute, lsp, and nht update */ |
2264 | redistribute_update(dest_pfx, src_pfx, re, NULL); | |
2265 | ||
efe6c026 MS |
2266 | } else if (start_count > 0 && end_count == 0) { |
2267 | if (debug_p) | |
bd47f3a3 | 2268 | zlog_debug( |
2919eea8 | 2269 | "%s(%u:%u):%pFX un-installed transition from dplane notification", |
bd47f3a3 | 2270 | VRF_LOGNAME(vrf), dplane_ctx_get_vrf(ctx), |
2919eea8 | 2271 | dplane_ctx_get_table(ctx), dest_pfx); |
efe6c026 MS |
2272 | |
2273 | /* Transition from _something_ installed to _nothing_ | |
2274 | * installed. | |
2275 | */ | |
2276 | /* We expect this to be the selected route, so we want | |
2277 | * to tell others about this transistion. | |
2278 | */ | |
2279 | UNSET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); | |
2280 | ||
188a00e0 MS |
2281 | /* Changed nexthops - update kernel/others */ |
2282 | dplane_route_notif_update(rn, re, DPLANE_OP_ROUTE_DELETE, ctx); | |
2283 | ||
efe6c026 | 2284 | /* Redistribute, lsp, and nht update */ |
40f321c0 | 2285 | redistribute_delete(dest_pfx, src_pfx, re, NULL); |
9287b4c5 | 2286 | } |
efe6c026 | 2287 | |
9287b4c5 MS |
2288 | /* Make any changes visible for lsp and nexthop-tracking processing */ |
2289 | zebra_rib_evaluate_rn_nexthops( | |
2290 | rn, zebra_router_get_next_sequence()); | |
efe6c026 | 2291 | |
9287b4c5 | 2292 | zebra_rib_evaluate_mpls(rn); |
941e261c | 2293 | |
54818e3b | 2294 | done: |
941e261c MS |
2295 | if (rn) |
2296 | route_unlock_node(rn); | |
2297 | ||
54818e3b MS |
2298 | /* Return context to dataplane module */ |
2299 | dplane_ctx_fini(&ctx); | |
2300 | } | |
2301 | ||
04bec7b2 MS |
2302 | /* |
2303 | * Process the nexthop-group workqueue subqueue | |
2304 | */ | |
e22e8001 | 2305 | static void process_subq_nhg(struct listnode *lnode) |
e96f9203 | 2306 | { |
04bec7b2 MS |
2307 | struct nhg_ctx *ctx; |
2308 | struct nhg_hash_entry *nhe, *newnhe; | |
2309 | struct wq_nhg_wrapper *w; | |
e22e8001 | 2310 | uint8_t qindex = route_info[ZEBRA_ROUTE_NHG].meta_q_map; |
5110a0c6 | 2311 | |
04bec7b2 | 2312 | w = listgetdata(lnode); |
e22e8001 | 2313 | |
04bec7b2 | 2314 | if (!w) |
e22e8001 SW |
2315 | return; |
2316 | ||
04bec7b2 MS |
2317 | /* Two types of object - an update from the local kernel, or |
2318 | * an nhg update from a daemon. | |
2319 | */ | |
2320 | if (w->type == WQ_NHG_WRAPPER_TYPE_CTX) { | |
2321 | ctx = w->u.ctx; | |
2322 | ||
2323 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2324 | zlog_debug( | |
2325 | "NHG Context id=%u dequeued from sub-queue %u", | |
2326 | ctx->id, qindex); | |
2327 | ||
2328 | ||
2329 | /* Process nexthop group updates coming 'up' from the OS */ | |
2330 | nhg_ctx_process(ctx); | |
e22e8001 | 2331 | |
04bec7b2 MS |
2332 | } else if (w->type == WQ_NHG_WRAPPER_TYPE_NHG) { |
2333 | nhe = w->u.nhe; | |
2334 | ||
2335 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2336 | zlog_debug("NHG %u dequeued from sub-queue %u", | |
2337 | nhe->id, qindex); | |
2338 | ||
2339 | /* Process incoming nhg update, probably from a proto daemon */ | |
2340 | newnhe = zebra_nhg_proto_add(nhe->id, nhe->type, | |
2341 | nhe->zapi_instance, | |
2342 | nhe->zapi_session, | |
2343 | &nhe->nhg, 0); | |
2344 | ||
2345 | /* Report error to daemon via ZAPI */ | |
2346 | if (newnhe == NULL) | |
2347 | zsend_nhg_notify(nhe->type, nhe->zapi_instance, | |
2348 | nhe->zapi_session, nhe->id, | |
2349 | ZAPI_NHG_FAIL_INSTALL); | |
2350 | ||
2351 | /* Free temp nhe - we own that memory. */ | |
2352 | zebra_nhg_free(nhe); | |
2353 | } | |
e22e8001 | 2354 | |
04bec7b2 | 2355 | XFREE(MTYPE_WQ_NHG_WRAPPER, w); |
e22e8001 SW |
2356 | } |
2357 | ||
2358 | static void process_subq_route(struct listnode *lnode, uint8_t qindex) | |
2359 | { | |
2360 | struct route_node *rnode = NULL; | |
2361 | rib_dest_t *dest = NULL; | |
2362 | struct zebra_vrf *zvrf = NULL; | |
5110a0c6 | 2363 | |
d62a17ae | 2364 | rnode = listgetdata(lnode); |
2365 | dest = rib_dest_from_rnode(rnode); | |
c2c02b76 DS |
2366 | assert(dest); |
2367 | ||
2368 | zvrf = rib_dest_vrf(dest); | |
41ec9222 | 2369 | |
d62a17ae | 2370 | rib_process(rnode); |
5110a0c6 | 2371 | |
d62a17ae | 2372 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) { |
7e26b9d4 | 2373 | struct route_entry *re = NULL; |
d62a17ae | 2374 | char buf[SRCDEST2STR_BUFFER]; |
efe6c026 | 2375 | |
7e26b9d4 DS |
2376 | /* |
2377 | * rib_process may have freed the dest | |
2378 | * as part of the garbage collection. Let's | |
2379 | * prevent stupidity from happening. | |
2380 | */ | |
2381 | dest = rib_dest_from_rnode(rnode); | |
2382 | if (dest) | |
2383 | re = re_list_first(&dest->routes); | |
2384 | ||
d62a17ae | 2385 | srcdest_rnode2str(rnode, buf, sizeof(buf)); |
c2c02b76 | 2386 | zlog_debug("%s(%u:%u):%s: rn %p dequeued from sub-queue %u", |
04bec7b2 MS |
2387 | zvrf_name(zvrf), zvrf_id(zvrf), re ? re->table : 0, |
2388 | buf, rnode, qindex); | |
d62a17ae | 2389 | } |
41ec9222 | 2390 | |
d62a17ae | 2391 | if (rnode->info) |
2392 | UNSET_FLAG(rib_dest_from_rnode(rnode)->flags, | |
2393 | RIB_ROUTE_QUEUED(qindex)); | |
9fd92e3c | 2394 | |
d62a17ae | 2395 | route_unlock_node(rnode); |
e22e8001 SW |
2396 | } |
2397 | ||
2398 | /* Take a list of route_node structs and return 1, if there was a record | |
2399 | * picked from it and processed by rib_process(). Don't process more, | |
2400 | * than one RN record; operate only in the specified sub-queue. | |
2401 | */ | |
2402 | static unsigned int process_subq(struct list *subq, uint8_t qindex) | |
2403 | { | |
2404 | struct listnode *lnode = listhead(subq); | |
2405 | ||
2406 | if (!lnode) | |
2407 | return 0; | |
2408 | ||
2409 | if (qindex == route_info[ZEBRA_ROUTE_NHG].meta_q_map) | |
2410 | process_subq_nhg(lnode); | |
2411 | else | |
2412 | process_subq_route(lnode, qindex); | |
2413 | ||
d62a17ae | 2414 | list_delete_node(subq, lnode); |
e22e8001 | 2415 | |
d62a17ae | 2416 | return 1; |
e96f9203 DO |
2417 | } |
2418 | ||
2419 | /* Dispatch the meta queue by picking, processing and unlocking the next RN from | |
d62a17ae | 2420 | * a non-empty sub-queue with lowest priority. wq is equal to zebra->ribq and |
04bec7b2 | 2421 | * data is pointed to the meta queue structure. |
e96f9203 | 2422 | */ |
d62a17ae | 2423 | static wq_item_status meta_queue_process(struct work_queue *dummy, void *data) |
e96f9203 | 2424 | { |
d62a17ae | 2425 | struct meta_queue *mq = data; |
2426 | unsigned i; | |
91f16812 MS |
2427 | uint32_t queue_len, queue_limit; |
2428 | ||
2429 | /* Ensure there's room for more dataplane updates */ | |
2430 | queue_limit = dplane_get_in_queue_limit(); | |
2431 | queue_len = dplane_get_in_queue_len(); | |
2432 | if (queue_len > queue_limit) { | |
2433 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
8b962e77 MS |
2434 | zlog_debug("rib queue: dplane queue len %u, limit %u, retrying", |
2435 | queue_len, queue_limit); | |
91f16812 MS |
2436 | |
2437 | /* Ensure that the meta-queue is actually enqueued */ | |
489a9614 | 2438 | if (work_queue_empty(zrouter.ribq)) |
ea45a4e7 | 2439 | work_queue_add(zrouter.ribq, zrouter.mq); |
91f16812 MS |
2440 | |
2441 | return WQ_QUEUE_BLOCKED; | |
2442 | } | |
5110a0c6 | 2443 | |
d62a17ae | 2444 | for (i = 0; i < MQ_SIZE; i++) |
2445 | if (process_subq(mq->subq[i], i)) { | |
2446 | mq->size--; | |
2447 | break; | |
2448 | } | |
2449 | return mq->size ? WQ_REQUEUE : WQ_SUCCESS; | |
e96f9203 DO |
2450 | } |
2451 | ||
f52ed677 DS |
2452 | |
2453 | /* | |
2454 | * Look into the RN and queue it into the highest priority queue | |
2455 | * at this point in time for processing. | |
2456 | * | |
2457 | * We will enqueue a route node only once per invocation. | |
2458 | * | |
2459 | * There are two possibilities here that should be kept in mind. | |
2460 | * If the original invocation has not been pulled off for processing | |
2461 | * yet, A subsuquent invocation can have a route entry with a better | |
2462 | * meta queue index value and we can have a situation where | |
2463 | * we might have the same node enqueued 2 times. Not necessarily | |
2464 | * an optimal situation but it should be ok. | |
2465 | * | |
2466 | * The other possibility is that the original invocation has not | |
2467 | * been pulled off for processing yet, A subsusquent invocation | |
2468 | * doesn't have a route_entry with a better meta-queue and the | |
2469 | * original metaqueue index value will win and we'll end up with | |
2470 | * the route node enqueued once. | |
e96f9203 | 2471 | */ |
e22e8001 | 2472 | static int rib_meta_queue_add(struct meta_queue *mq, void *data) |
e96f9203 | 2473 | { |
e22e8001 | 2474 | struct route_node *rn = NULL; |
f52ed677 DS |
2475 | struct route_entry *re = NULL, *curr_re = NULL; |
2476 | uint8_t qindex = MQ_SIZE, curr_qindex = MQ_SIZE; | |
5110a0c6 | 2477 | |
e22e8001 SW |
2478 | rn = (struct route_node *)data; |
2479 | ||
f52ed677 DS |
2480 | RNODE_FOREACH_RE (rn, curr_re) { |
2481 | curr_qindex = route_info[curr_re->type].meta_q_map; | |
d62a17ae | 2482 | |
f52ed677 DS |
2483 | if (curr_qindex <= qindex) { |
2484 | re = curr_re; | |
2485 | qindex = curr_qindex; | |
d62a17ae | 2486 | } |
f52ed677 | 2487 | } |
5110a0c6 | 2488 | |
f52ed677 | 2489 | if (!re) |
e22e8001 | 2490 | return -1; |
5110a0c6 | 2491 | |
f52ed677 DS |
2492 | /* Invariant: at this point we always have rn->info set. */ |
2493 | if (CHECK_FLAG(rib_dest_from_rnode(rn)->flags, | |
2494 | RIB_ROUTE_QUEUED(qindex))) { | |
d62a17ae | 2495 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
2496 | rnode_debug(rn, re->vrf_id, | |
f52ed677 | 2497 | "rn %p is already queued in sub-queue %u", |
d62a17ae | 2498 | (void *)rn, qindex); |
e22e8001 | 2499 | return -1; |
d62a17ae | 2500 | } |
f52ed677 DS |
2501 | |
2502 | SET_FLAG(rib_dest_from_rnode(rn)->flags, RIB_ROUTE_QUEUED(qindex)); | |
2503 | listnode_add(mq->subq[qindex], rn); | |
2504 | route_lock_node(rn); | |
2505 | mq->size++; | |
2506 | ||
2507 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2508 | rnode_debug(rn, re->vrf_id, "queued rn %p into sub-queue %u", | |
2509 | (void *)rn, qindex); | |
e22e8001 SW |
2510 | |
2511 | return 0; | |
4d38fdb4 | 2512 | } |
2513 | ||
04bec7b2 | 2514 | static int rib_meta_queue_nhg_ctx_add(struct meta_queue *mq, void *data) |
4d38fdb4 | 2515 | { |
e22e8001 SW |
2516 | struct nhg_ctx *ctx = NULL; |
2517 | uint8_t qindex = route_info[ZEBRA_ROUTE_NHG].meta_q_map; | |
04bec7b2 | 2518 | struct wq_nhg_wrapper *w; |
fc328ac9 | 2519 | |
e22e8001 SW |
2520 | ctx = (struct nhg_ctx *)data; |
2521 | ||
2522 | if (!ctx) | |
2523 | return -1; | |
4d38fdb4 | 2524 | |
04bec7b2 MS |
2525 | w = XCALLOC(MTYPE_WQ_NHG_WRAPPER, sizeof(struct wq_nhg_wrapper)); |
2526 | ||
2527 | w->type = WQ_NHG_WRAPPER_TYPE_CTX; | |
2528 | w->u.ctx = ctx; | |
2529 | ||
2530 | listnode_add(mq->subq[qindex], w); | |
e22e8001 SW |
2531 | mq->size++; |
2532 | ||
2533 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2534 | zlog_debug("NHG Context id=%u queued into sub-queue %u", | |
2535 | ctx->id, qindex); | |
2536 | ||
2537 | return 0; | |
2538 | } | |
2539 | ||
04bec7b2 MS |
2540 | static int rib_meta_queue_nhg_add(struct meta_queue *mq, void *data) |
2541 | { | |
2542 | struct nhg_hash_entry *nhe = NULL; | |
2543 | uint8_t qindex = route_info[ZEBRA_ROUTE_NHG].meta_q_map; | |
2544 | struct wq_nhg_wrapper *w; | |
2545 | ||
2546 | nhe = (struct nhg_hash_entry *)data; | |
2547 | ||
2548 | if (!nhe) | |
2549 | return -1; | |
2550 | ||
2551 | w = XCALLOC(MTYPE_WQ_NHG_WRAPPER, sizeof(struct wq_nhg_wrapper)); | |
2552 | ||
2553 | w->type = WQ_NHG_WRAPPER_TYPE_NHG; | |
2554 | w->u.nhe = nhe; | |
2555 | ||
2556 | listnode_add(mq->subq[qindex], w); | |
2557 | mq->size++; | |
2558 | ||
2559 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2560 | zlog_debug("NHG id=%u queued into sub-queue %u", | |
2561 | nhe->id, qindex); | |
2562 | ||
2563 | return 0; | |
2564 | } | |
2565 | ||
e22e8001 SW |
2566 | static int mq_add_handler(void *data, |
2567 | int (*mq_add_func)(struct meta_queue *mq, void *data)) | |
2568 | { | |
489a9614 | 2569 | if (zrouter.ribq == NULL) { |
e914ccbe | 2570 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2571 | "%s: work_queue does not exist!", __func__); |
e22e8001 | 2572 | return -1; |
d62a17ae | 2573 | } |
2574 | ||
2575 | /* | |
2576 | * The RIB queue should normally be either empty or holding the only | |
2577 | * work_queue_item element. In the latter case this element would | |
2578 | * hold a pointer to the meta queue structure, which must be used to | |
2579 | * actually queue the route nodes to process. So create the MQ | |
2580 | * holder, if necessary, then push the work into it in any case. | |
2581 | * This semantics was introduced after 0.99.9 release. | |
2582 | */ | |
489a9614 | 2583 | if (work_queue_empty(zrouter.ribq)) |
ea45a4e7 | 2584 | work_queue_add(zrouter.ribq, zrouter.mq); |
e96f9203 | 2585 | |
e22e8001 SW |
2586 | return mq_add_func(zrouter.mq, data); |
2587 | } | |
fc328ac9 | 2588 | |
e22e8001 SW |
2589 | /* Add route_node to work queue and schedule processing */ |
2590 | int rib_queue_add(struct route_node *rn) | |
2591 | { | |
2592 | assert(rn); | |
2593 | ||
2594 | /* Pointless to queue a route_node with no RIB entries to add or remove | |
2595 | */ | |
2596 | if (!rnode_to_ribs(rn)) { | |
c10e14e9 DS |
2597 | zlog_debug("%s: called for route_node (%p, %u) with no ribs", |
2598 | __func__, (void *)rn, route_node_get_lock_count(rn)); | |
e22e8001 SW |
2599 | zlog_backtrace(LOG_DEBUG); |
2600 | return -1; | |
2601 | } | |
2602 | ||
04bec7b2 | 2603 | return mq_add_handler(rn, rib_meta_queue_add); |
e22e8001 SW |
2604 | } |
2605 | ||
04bec7b2 MS |
2606 | /* |
2607 | * Enqueue incoming nhg info from OS for processing | |
2608 | */ | |
2609 | int rib_queue_nhg_ctx_add(struct nhg_ctx *ctx) | |
e22e8001 SW |
2610 | { |
2611 | assert(ctx); | |
2612 | ||
04bec7b2 MS |
2613 | return mq_add_handler(ctx, rib_meta_queue_nhg_ctx_add); |
2614 | } | |
2615 | ||
2616 | /* | |
2617 | * Enqueue incoming nhg from proto daemon for processing | |
2618 | */ | |
2619 | int rib_queue_nhe_add(struct nhg_hash_entry *nhe) | |
2620 | { | |
2621 | if (nhe == NULL) | |
2622 | return -1; | |
2623 | ||
2624 | return mq_add_handler(nhe, rib_meta_queue_nhg_add); | |
2625 | } | |
2626 | ||
2627 | /* Clean up the nhg meta-queue list */ | |
2628 | static void nhg_meta_queue_free(struct list *l) | |
2629 | { | |
2630 | struct wq_nhg_wrapper *w; | |
2631 | struct listnode *node; | |
2632 | ||
2633 | /* Free the node wrapper object, and the struct it wraps */ | |
2634 | while ((node = listhead(l)) != NULL) { | |
2635 | w = node->data; | |
2636 | node->data = NULL; | |
2637 | ||
2638 | if (w->type == WQ_NHG_WRAPPER_TYPE_CTX) | |
2639 | nhg_ctx_free(&w->u.ctx); | |
2640 | else if (w->type == WQ_NHG_WRAPPER_TYPE_NHG) | |
2641 | zebra_nhg_free(w->u.nhe); | |
2642 | ||
2643 | XFREE(MTYPE_WQ_NHG_WRAPPER, w); | |
2644 | ||
2645 | list_delete_node(l, node); | |
2646 | } | |
4d38fdb4 | 2647 | } |
2648 | ||
5110a0c6 SH |
2649 | /* Create new meta queue. |
2650 | A destructor function doesn't seem to be necessary here. | |
2651 | */ | |
d62a17ae | 2652 | static struct meta_queue *meta_queue_new(void) |
e96f9203 | 2653 | { |
d62a17ae | 2654 | struct meta_queue *new; |
2655 | unsigned i; | |
5110a0c6 | 2656 | |
d62a17ae | 2657 | new = XCALLOC(MTYPE_WORK_QUEUE, sizeof(struct meta_queue)); |
e96f9203 | 2658 | |
d62a17ae | 2659 | for (i = 0; i < MQ_SIZE; i++) { |
2660 | new->subq[i] = list_new(); | |
2661 | assert(new->subq[i]); | |
2662 | } | |
5110a0c6 | 2663 | |
d62a17ae | 2664 | return new; |
e96f9203 DO |
2665 | } |
2666 | ||
d62a17ae | 2667 | void meta_queue_free(struct meta_queue *mq) |
5a8dfcd8 | 2668 | { |
d62a17ae | 2669 | unsigned i; |
5a8dfcd8 | 2670 | |
04bec7b2 MS |
2671 | for (i = 0; i < MQ_SIZE; i++) { |
2672 | /* Some subqueues may need cleanup - nhgs for example */ | |
2673 | if (i == route_info[ZEBRA_ROUTE_NHG].meta_q_map) | |
2674 | nhg_meta_queue_free(mq->subq[i]); | |
2675 | ||
6a154c88 | 2676 | list_delete(&mq->subq[i]); |
04bec7b2 | 2677 | } |
5a8dfcd8 | 2678 | |
d62a17ae | 2679 | XFREE(MTYPE_WORK_QUEUE, mq); |
5a8dfcd8 RW |
2680 | } |
2681 | ||
4d38fdb4 | 2682 | /* initialise zebra rib work queue */ |
2561d12e | 2683 | static void rib_queue_init(void) |
4d38fdb4 | 2684 | { |
489a9614 DS |
2685 | if (!(zrouter.ribq = work_queue_new(zrouter.master, |
2686 | "route_node processing"))) { | |
e914ccbe | 2687 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2688 | "%s: could not initialise work queue!", __func__); |
d62a17ae | 2689 | return; |
2690 | } | |
4d38fdb4 | 2691 | |
d62a17ae | 2692 | /* fill in the work queue spec */ |
489a9614 DS |
2693 | zrouter.ribq->spec.workfunc = &meta_queue_process; |
2694 | zrouter.ribq->spec.errorfunc = NULL; | |
46a4e345 | 2695 | zrouter.ribq->spec.completion_func = NULL; |
d62a17ae | 2696 | /* XXX: TODO: These should be runtime configurable via vty */ |
489a9614 DS |
2697 | zrouter.ribq->spec.max_retries = 3; |
2698 | zrouter.ribq->spec.hold = ZEBRA_RIB_PROCESS_HOLD_TIME; | |
2699 | zrouter.ribq->spec.retry = ZEBRA_RIB_PROCESS_RETRY_TIME; | |
d62a17ae | 2700 | |
ea45a4e7 | 2701 | if (!(zrouter.mq = meta_queue_new())) { |
e914ccbe | 2702 | flog_err(EC_ZEBRA_WQ_NONEXISTENT, |
1c50c1c0 | 2703 | "%s: could not initialise meta queue!", __func__); |
d62a17ae | 2704 | return; |
2705 | } | |
2706 | return; | |
718e3744 | 2707 | } |
2708 | ||
434434f7 DS |
2709 | rib_dest_t *zebra_rib_create_dest(struct route_node *rn) |
2710 | { | |
2711 | rib_dest_t *dest; | |
2712 | ||
2713 | dest = XCALLOC(MTYPE_RIB_DEST, sizeof(rib_dest_t)); | |
aa57abfb | 2714 | rnh_list_init(&dest->nht); |
daaeaa21 | 2715 | re_list_init(&dest->routes); |
434434f7 DS |
2716 | route_lock_node(rn); /* rn route table reference */ |
2717 | rn->info = dest; | |
2718 | dest->rnode = rn; | |
2719 | ||
2720 | return dest; | |
2721 | } | |
2722 | ||
6d691129 PJ |
2723 | /* RIB updates are processed via a queue of pointers to route_nodes. |
2724 | * | |
2725 | * The queue length is bounded by the maximal size of the routing table, | |
2726 | * as a route_node will not be requeued, if already queued. | |
2727 | * | |
f0f77c9a DS |
2728 | * REs are submitted via rib_addnode or rib_delnode which set minimal |
2729 | * state, or static_install_route (when an existing RE is updated) | |
3c0755dc | 2730 | * and then submit route_node to queue for best-path selection later. |
f0f77c9a | 2731 | * Order of add/delete state changes are preserved for any given RE. |
6d691129 | 2732 | * |
f0f77c9a | 2733 | * Deleted REs are reaped during best-path selection. |
6d691129 PJ |
2734 | * |
2735 | * rib_addnode | |
f0f77c9a DS |
2736 | * |-> rib_link or unset ROUTE_ENTRY_REMOVE |->Update kernel with |
2737 | * |-------->| | best RE, if required | |
3c0755dc PJ |
2738 | * | | |
2739 | * static_install->|->rib_addqueue...... -> rib_process | |
2740 | * | | | |
2741 | * |-------->| |-> rib_unlink | |
f0f77c9a DS |
2742 | * |-> set ROUTE_ENTRY_REMOVE | |
2743 | * rib_delnode (RE freed) | |
6d691129 | 2744 | * |
9fd92e3c AS |
2745 | * The 'info' pointer of a route_node points to a rib_dest_t |
2746 | * ('dest'). Queueing state for a route_node is kept on the dest. The | |
2747 | * dest is created on-demand by rib_link() and is kept around at least | |
2748 | * as long as there are ribs hanging off it (@see rib_gc_dest()). | |
d62a17ae | 2749 | * |
6d691129 PJ |
2750 | * Refcounting (aka "locking" throughout the GNU Zebra and Quagga code): |
2751 | * | |
2752 | * - route_nodes: refcounted by: | |
9fd92e3c AS |
2753 | * - dest attached to route_node: |
2754 | * - managed by: rib_link/rib_gc_dest | |
6d691129 PJ |
2755 | * - route_node processing queue |
2756 | * - managed by: rib_addqueue, rib_process. | |
2757 | * | |
2758 | */ | |
d62a17ae | 2759 | |
f0f77c9a | 2760 | /* Add RE to head of the route node. */ |
d62a17ae | 2761 | static void rib_link(struct route_node *rn, struct route_entry *re, int process) |
2762 | { | |
d62a17ae | 2763 | rib_dest_t *dest; |
2764 | afi_t afi; | |
2765 | const char *rmap_name; | |
9fd92e3c | 2766 | |
d62a17ae | 2767 | assert(re && rn); |
9fd92e3c | 2768 | |
d62a17ae | 2769 | dest = rib_dest_from_rnode(rn); |
2770 | if (!dest) { | |
2771 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) | |
2772 | rnode_debug(rn, re->vrf_id, "rn %p adding dest", rn); | |
7a4bb9c5 | 2773 | |
434434f7 | 2774 | dest = zebra_rib_create_dest(rn); |
d62a17ae | 2775 | } |
2263a412 | 2776 | |
045207e2 | 2777 | re_list_add_head(&dest->routes, re); |
d62a17ae | 2778 | |
2779 | afi = (rn->p.family == AF_INET) | |
2780 | ? AFI_IP | |
2781 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
fe257ae7 DS |
2782 | if (is_zebra_import_table_enabled(afi, re->vrf_id, re->table)) { |
2783 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(re->vrf_id); | |
2784 | ||
d62a17ae | 2785 | rmap_name = zebra_get_import_table_route_map(afi, re->table); |
fe257ae7 | 2786 | zebra_add_import_table_entry(zvrf, rn, re, rmap_name); |
d62a17ae | 2787 | } else if (process) |
2788 | rib_queue_add(rn); | |
2789 | } | |
2790 | ||
7e24fdf3 DS |
2791 | static void rib_addnode(struct route_node *rn, |
2792 | struct route_entry *re, int process) | |
d62a17ae | 2793 | { |
2794 | /* RE node has been un-removed before route-node is processed. | |
2795 | * route_node must hence already be on the queue for processing.. | |
2796 | */ | |
2797 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
2798 | if (IS_ZEBRA_DEBUG_RIB) | |
2799 | rnode_debug(rn, re->vrf_id, "rn %p, un-removed re %p", | |
2800 | (void *)rn, (void *)re); | |
2801 | ||
2802 | UNSET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2803 | return; | |
2804 | } | |
2805 | rib_link(rn, re, process); | |
6d691129 PJ |
2806 | } |
2807 | ||
9fd92e3c AS |
2808 | /* |
2809 | * rib_unlink | |
2810 | * | |
2811 | * Detach a rib structure from a route_node. | |
2812 | * | |
2813 | * Note that a call to rib_unlink() should be followed by a call to | |
2814 | * rib_gc_dest() at some point. This allows a rib_dest_t that is no | |
2815 | * longer required to be deleted. | |
2816 | */ | |
d62a17ae | 2817 | void rib_unlink(struct route_node *rn, struct route_entry *re) |
6d691129 | 2818 | { |
d62a17ae | 2819 | rib_dest_t *dest; |
9fd92e3c | 2820 | |
d62a17ae | 2821 | assert(rn && re); |
6d691129 | 2822 | |
d62a17ae | 2823 | if (IS_ZEBRA_DEBUG_RIB) |
2824 | rnode_debug(rn, re->vrf_id, "rn %p, re %p", (void *)rn, | |
2825 | (void *)re); | |
6d691129 | 2826 | |
d62a17ae | 2827 | dest = rib_dest_from_rnode(rn); |
6d691129 | 2828 | |
045207e2 | 2829 | re_list_del(&dest->routes, re); |
7a4bb9c5 | 2830 | |
2eb07de3 DS |
2831 | if (dest->selected_fib == re) |
2832 | dest->selected_fib = NULL; | |
2833 | ||
1d48702e MS |
2834 | if (re->nhe && re->nhe_id) { |
2835 | assert(re->nhe->id == re->nhe_id); | |
2836 | zebra_nhg_decrement_ref(re->nhe); | |
2837 | } else if (re->nhe && re->nhe->nhg.nexthop) | |
c415d895 | 2838 | nexthops_free(re->nhe->nhg.nexthop); |
22bcedb2 | 2839 | |
ee5e8a48 MS |
2840 | nexthops_free(re->fib_ng.nexthop); |
2841 | ||
224ccf29 | 2842 | zapi_opaque_free(re->opaque); |
a29a6001 | 2843 | |
d62a17ae | 2844 | XFREE(MTYPE_RE, re); |
2845 | } | |
2846 | ||
2847 | void rib_delnode(struct route_node *rn, struct route_entry *re) | |
2848 | { | |
2849 | afi_t afi; | |
2850 | ||
2851 | if (IS_ZEBRA_DEBUG_RIB) | |
2852 | rnode_debug(rn, re->vrf_id, "rn %p, re %p, removing", | |
2853 | (void *)rn, (void *)re); | |
2854 | SET_FLAG(re->status, ROUTE_ENTRY_REMOVED); | |
2855 | ||
2856 | afi = (rn->p.family == AF_INET) | |
2857 | ? AFI_IP | |
2858 | : (rn->p.family == AF_INET6) ? AFI_IP6 : AFI_MAX; | |
fe257ae7 DS |
2859 | if (is_zebra_import_table_enabled(afi, re->vrf_id, re->table)) { |
2860 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(re->vrf_id); | |
2861 | ||
2862 | zebra_del_import_table_entry(zvrf, rn, re); | |
d62a17ae | 2863 | /* Just clean up if non main table */ |
2864 | if (IS_ZEBRA_DEBUG_RIB) { | |
2865 | char buf[SRCDEST2STR_BUFFER]; | |
2866 | srcdest_rnode2str(rn, buf, sizeof(buf)); | |
bd47f3a3 JU |
2867 | zlog_debug("%s(%u):%s: Freeing route rn %p, re %p (%s)", |
2868 | vrf_id_to_name(re->vrf_id), re->vrf_id, buf, | |
2869 | rn, re, zebra_route_string(re->type)); | |
d62a17ae | 2870 | } |
7a4bb9c5 | 2871 | |
d62a17ae | 2872 | rib_unlink(rn, re); |
2873 | } else { | |
2874 | rib_queue_add(rn); | |
2875 | } | |
718e3744 | 2876 | } |
2877 | ||
6d81b590 MS |
2878 | /* |
2879 | * Helper that debugs a single nexthop within a route-entry | |
2880 | */ | |
2881 | static void _route_entry_dump_nh(const struct route_entry *re, | |
2882 | const char *straddr, | |
2883 | const struct nexthop *nexthop) | |
2884 | { | |
2885 | char nhname[PREFIX_STRLEN]; | |
2886 | char backup_str[50]; | |
2887 | char wgt_str[50]; | |
474aebd9 | 2888 | char temp_str[10]; |
cbe5bafb | 2889 | char label_str[MPLS_LABEL_STRLEN]; |
474aebd9 | 2890 | int i; |
6d81b590 MS |
2891 | struct interface *ifp; |
2892 | struct vrf *vrf = vrf_lookup_by_id(nexthop->vrf_id); | |
2893 | ||
2894 | switch (nexthop->type) { | |
2895 | case NEXTHOP_TYPE_BLACKHOLE: | |
772270f3 | 2896 | snprintf(nhname, sizeof(nhname), "Blackhole"); |
6d81b590 MS |
2897 | break; |
2898 | case NEXTHOP_TYPE_IFINDEX: | |
2899 | ifp = if_lookup_by_index(nexthop->ifindex, nexthop->vrf_id); | |
772270f3 QY |
2900 | snprintf(nhname, sizeof(nhname), "%s", |
2901 | ifp ? ifp->name : "Unknown"); | |
6d81b590 MS |
2902 | break; |
2903 | case NEXTHOP_TYPE_IPV4: | |
2904 | /* fallthrough */ | |
2905 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
2906 | inet_ntop(AF_INET, &nexthop->gate, nhname, INET6_ADDRSTRLEN); | |
2907 | break; | |
2908 | case NEXTHOP_TYPE_IPV6: | |
2909 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
2910 | inet_ntop(AF_INET6, &nexthop->gate, nhname, INET6_ADDRSTRLEN); | |
2911 | break; | |
2912 | } | |
2913 | ||
cbe5bafb MS |
2914 | /* Label stack */ |
2915 | label_str[0] = '\0'; | |
2916 | if (nexthop->nh_label && nexthop->nh_label->num_labels > 0) { | |
2917 | mpls_label2str(nexthop->nh_label->num_labels, | |
2918 | nexthop->nh_label->label, label_str, | |
2919 | sizeof(label_str), 0 /*pretty*/); | |
2920 | strlcat(label_str, ", ", sizeof(label_str)); | |
2921 | } | |
2922 | ||
6d81b590 MS |
2923 | backup_str[0] = '\0'; |
2924 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP)) { | |
474aebd9 MS |
2925 | snprintf(backup_str, sizeof(backup_str), "backup "); |
2926 | for (i = 0; i < nexthop->backup_num; i++) { | |
2927 | snprintf(temp_str, sizeof(temp_str), "%d, ", | |
2928 | nexthop->backup_idx[i]); | |
2929 | strlcat(backup_str, temp_str, sizeof(backup_str)); | |
2930 | } | |
6d81b590 MS |
2931 | } |
2932 | ||
2933 | wgt_str[0] = '\0'; | |
2934 | if (nexthop->weight) | |
2935 | snprintf(wgt_str, sizeof(wgt_str), "wgt %d,", nexthop->weight); | |
2936 | ||
cbe5bafb | 2937 | zlog_debug("%s: %s %s[%u] %svrf %s(%u) %s%s with flags %s%s%s%s%s%s%s%s", |
6d81b590 | 2938 | straddr, (nexthop->rparent ? " NH" : "NH"), nhname, |
cbe5bafb | 2939 | nexthop->ifindex, label_str, vrf ? vrf->name : "Unknown", |
6d81b590 MS |
2940 | nexthop->vrf_id, |
2941 | wgt_str, backup_str, | |
2942 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE) | |
2943 | ? "ACTIVE " | |
2944 | : ""), | |
2945 | (CHECK_FLAG(re->status, ROUTE_ENTRY_INSTALLED) | |
2946 | ? "FIB " | |
2947 | : ""), | |
2948 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE) | |
2949 | ? "RECURSIVE " | |
2950 | : ""), | |
2951 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK) | |
2952 | ? "ONLINK " | |
2953 | : ""), | |
2954 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_DUPLICATE) | |
2955 | ? "DUPLICATE " | |
aab4eca1 DS |
2956 | : ""), |
2957 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RNH_FILTERED) | |
2958 | ? "FILTERED " : ""), | |
2959 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_HAS_BACKUP) | |
2960 | ? "BACKUP " : ""), | |
2961 | (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_SRTE) | |
2962 | ? "SRTE " : "")); | |
6d81b590 MS |
2963 | |
2964 | } | |
2965 | ||
f0f77c9a | 2966 | /* This function dumps the contents of a given RE entry into |
dc95824a DO |
2967 | * standard debug log. Calling function name and IP prefix in |
2968 | * question are passed as 1st and 2nd arguments. | |
2969 | */ | |
d62a17ae | 2970 | void _route_entry_dump(const char *func, union prefixconstptr pp, |
2971 | union prefixconstptr src_pp, | |
2972 | const struct route_entry *re) | |
2973 | { | |
d62a17ae | 2974 | const struct prefix *src_p = src_pp.p; |
2975 | bool is_srcdst = src_p && src_p->prefixlen; | |
2976 | char straddr[PREFIX_STRLEN]; | |
2977 | char srcaddr[PREFIX_STRLEN]; | |
61e6de9d DS |
2978 | char flags_buf[128]; |
2979 | char status_buf[128]; | |
d62a17ae | 2980 | struct nexthop *nexthop; |
c479e756 | 2981 | struct vrf *vrf = vrf_lookup_by_id(re->vrf_id); |
6d81b590 | 2982 | struct nexthop_group *nhg; |
d62a17ae | 2983 | |
5d27875b DL |
2984 | prefix2str(pp, straddr, sizeof(straddr)); |
2985 | ||
c479e756 | 2986 | zlog_debug("%s: dumping RE entry %p for %s%s%s vrf %s(%u)", func, |
5d27875b | 2987 | (const void *)re, straddr, |
d62a17ae | 2988 | is_srcdst ? " from " : "", |
2989 | is_srcdst ? prefix2str(src_pp, srcaddr, sizeof(srcaddr)) | |
2990 | : "", | |
c479e756 | 2991 | VRF_LOGNAME(vrf), re->vrf_id); |
cc54cfee | 2992 | zlog_debug("%s: uptime == %lu, type == %u, instance == %d, table == %d", |
53c16fbe | 2993 | straddr, (unsigned long)re->uptime, re->type, re->instance, |
cc54cfee | 2994 | re->table); |
61e6de9d DS |
2995 | zlog_debug( |
2996 | "%s: metric == %u, mtu == %u, distance == %u, flags == %sstatus == %s", | |
2997 | straddr, re->metric, re->mtu, re->distance, | |
2998 | zclient_dump_route_flags(re->flags, flags_buf, | |
2999 | sizeof(flags_buf)), | |
3000 | _dump_re_status(re, status_buf, sizeof(status_buf))); | |
53c16fbe | 3001 | zlog_debug("%s: nexthop_num == %u, nexthop_active_num == %u", straddr, |
c415d895 MS |
3002 | nexthop_group_nexthop_num(&(re->nhe->nhg)), |
3003 | nexthop_group_active_nexthop_num(&(re->nhe->nhg))); | |
d62a17ae | 3004 | |
6d81b590 MS |
3005 | /* Dump nexthops */ |
3006 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) | |
3007 | _route_entry_dump_nh(re, straddr, nexthop); | |
2d68a0f2 | 3008 | |
6d81b590 MS |
3009 | if (zebra_nhg_get_backup_nhg(re->nhe)) { |
3010 | zlog_debug("%s: backup nexthops:", straddr); | |
3011 | ||
3012 | nhg = zebra_nhg_get_backup_nhg(re->nhe); | |
3013 | for (ALL_NEXTHOPS_PTR(nhg, nexthop)) | |
3014 | _route_entry_dump_nh(re, straddr, nexthop); | |
d62a17ae | 3015 | } |
6d81b590 | 3016 | |
53c16fbe | 3017 | zlog_debug("%s: dump complete", straddr); |
dc95824a DO |
3018 | } |
3019 | ||
6d81b590 MS |
3020 | /* |
3021 | * This is an exported helper to rtm_read() to dump the strange | |
f0f77c9a | 3022 | * RE entry found by rib_lookup_ipv4_route() |
dc95824a | 3023 | */ |
d62a17ae | 3024 | void rib_lookup_and_dump(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
3025 | { | |
3026 | struct route_table *table; | |
3027 | struct route_node *rn; | |
3028 | struct route_entry *re; | |
bd47f3a3 | 3029 | struct vrf *vrf; |
d62a17ae | 3030 | |
bd47f3a3 JU |
3031 | vrf = vrf_lookup_by_id(vrf_id); |
3032 | ||
d62a17ae | 3033 | /* Lookup table. */ |
3034 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
3035 | if (!table) { | |
e914ccbe | 3036 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
bd47f3a3 JU |
3037 | "%s:%s(%u) zebra_vrf_table() returned NULL", __func__, |
3038 | VRF_LOGNAME(vrf), vrf_id); | |
d62a17ae | 3039 | return; |
3040 | } | |
3041 | ||
3042 | /* Scan the RIB table for exactly matching RE entry. */ | |
3043 | rn = route_node_lookup(table, (struct prefix *)p); | |
3044 | ||
3045 | /* No route for this prefix. */ | |
3046 | if (!rn) { | |
2dbe669b DA |
3047 | zlog_debug("%s:%s(%u) lookup failed for %pFX", __func__, |
3048 | VRF_LOGNAME(vrf), vrf_id, (struct prefix *)p); | |
d62a17ae | 3049 | return; |
3050 | } | |
3051 | ||
3052 | /* Unlock node. */ | |
3053 | route_unlock_node(rn); | |
3054 | ||
3055 | /* let's go */ | |
a2addae8 | 3056 | RNODE_FOREACH_RE (rn, re) { |
bd47f3a3 JU |
3057 | zlog_debug("%s:%s(%u) rn %p, re %p: %s, %s", __func__, |
3058 | VRF_LOGNAME(vrf), vrf_id, (void *)rn, (void *)re, | |
d62a17ae | 3059 | (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED) |
3060 | ? "removed" | |
3061 | : "NOT removed"), | |
3062 | (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED) | |
3063 | ? "selected" | |
3064 | : "NOT selected")); | |
3065 | route_entry_dump(p, NULL, re); | |
3066 | } | |
dc95824a DO |
3067 | } |
3068 | ||
20e5ff0a DO |
3069 | /* Check if requested address assignment will fail due to another |
3070 | * route being installed by zebra in FIB already. Take necessary | |
3071 | * actions, if needed: remove such a route from FIB and deSELECT | |
f0f77c9a | 3072 | * corresponding RE entry. Then put affected RN into RIBQ head. |
20e5ff0a | 3073 | */ |
d62a17ae | 3074 | void rib_lookup_and_pushup(struct prefix_ipv4 *p, vrf_id_t vrf_id) |
3075 | { | |
3076 | struct route_table *table; | |
3077 | struct route_node *rn; | |
5f7a4718 | 3078 | rib_dest_t *dest; |
d62a17ae | 3079 | |
3080 | if (NULL == (table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id))) { | |
bd47f3a3 JU |
3081 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); |
3082 | ||
e914ccbe | 3083 | flog_err(EC_ZEBRA_TABLE_LOOKUP_FAILED, |
bd47f3a3 JU |
3084 | "%s:%s(%u) zebra_vrf_table() returned NULL", __func__, |
3085 | VRF_LOGNAME(vrf), vrf_id); | |
d62a17ae | 3086 | return; |
3087 | } | |
3088 | ||
3089 | /* No matches would be the simplest case. */ | |
3090 | if (NULL == (rn = route_node_lookup(table, (struct prefix *)p))) | |
3091 | return; | |
3092 | ||
3093 | /* Unlock node. */ | |
3094 | route_unlock_node(rn); | |
3095 | ||
5f7a4718 | 3096 | dest = rib_dest_from_rnode(rn); |
d62a17ae | 3097 | /* Check all RE entries. In case any changes have to be done, requeue |
3098 | * the RN into RIBQ head. If the routing message about the new connected | |
3099 | * route (generated by the IP address we are going to assign very soon) | |
3100 | * comes before the RIBQ is processed, the new RE entry will join | |
3101 | * RIBQ record already on head. This is necessary for proper | |
3102 | * revalidation | |
3103 | * of the rest of the RE. | |
3104 | */ | |
3cdba47a | 3105 | if (dest->selected_fib) { |
5f7a4718 | 3106 | if (IS_ZEBRA_DEBUG_RIB) { |
bd47f3a3 JU |
3107 | struct vrf *vrf = |
3108 | vrf_lookup_by_id(dest->selected_fib->vrf_id); | |
5f7a4718 | 3109 | |
bd47f3a3 | 3110 | zlog_debug( |
2dbe669b | 3111 | "%s(%u):%pFX: freeing way for connected prefix", |
bd47f3a3 | 3112 | VRF_LOGNAME(vrf), dest->selected_fib->vrf_id, |
2dbe669b | 3113 | &rn->p); |
5f7a4718 | 3114 | route_entry_dump(&rn->p, NULL, dest->selected_fib); |
d62a17ae | 3115 | } |
5f7a4718 | 3116 | rib_uninstall(rn, dest->selected_fib); |
d62a17ae | 3117 | rib_queue_add(rn); |
ade4a886 | 3118 | } |
20e5ff0a DO |
3119 | } |
3120 | ||
1d48702e MS |
3121 | /* |
3122 | * Internal route-add implementation; there are a couple of different public | |
3123 | * signatures. Callers in this path are responsible for the memory they | |
3124 | * allocate: if they allocate a nexthop_group or backup nexthop info, they | |
3125 | * must free those objects. If this returns < 0, an error has occurred and the | |
3126 | * route_entry 're' has not been captured; the caller should free that also. | |
3127 | */ | |
3128 | int rib_add_multipath_nhe(afi_t afi, safi_t safi, struct prefix *p, | |
6d81b590 | 3129 | struct prefix_ipv6 *src_p, struct route_entry *re, |
1d48702e | 3130 | struct nhg_hash_entry *re_nhe) |
718e3744 | 3131 | { |
98cda54a | 3132 | struct nhg_hash_entry *nhe = NULL; |
d62a17ae | 3133 | struct route_table *table; |
3134 | struct route_node *rn; | |
0ca6f3b1 | 3135 | struct route_entry *same = NULL, *first_same = NULL; |
d62a17ae | 3136 | int ret = 0; |
0ca6f3b1 MS |
3137 | int same_count = 0; |
3138 | rib_dest_t *dest; | |
b4c034b0 | 3139 | |
1d48702e MS |
3140 | if (!re || !re_nhe) |
3141 | return -1; | |
b4c034b0 | 3142 | |
1f610a1f | 3143 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
05737783 | 3144 | |
d62a17ae | 3145 | /* Lookup table. */ |
c7c0b007 SW |
3146 | table = zebra_vrf_get_table_with_table_id(afi, safi, re->vrf_id, |
3147 | re->table); | |
1d48702e MS |
3148 | if (!table) |
3149 | return -1; | |
cddf391b | 3150 | |
50db3f2f SW |
3151 | if (re->nhe_id > 0) { |
3152 | nhe = zebra_nhg_lookup_id(re->nhe_id); | |
98cda54a SW |
3153 | |
3154 | if (!nhe) { | |
3155 | flog_err( | |
3156 | EC_ZEBRA_TABLE_LOOKUP_FAILED, | |
3157 | "Zebra failed to find the nexthop hash entry for id=%u in a route entry", | |
50db3f2f | 3158 | re->nhe_id); |
1d48702e | 3159 | |
98cda54a SW |
3160 | return -1; |
3161 | } | |
3162 | } else { | |
377e29f7 MS |
3163 | /* Lookup nhe from route information */ |
3164 | nhe = zebra_nhg_rib_find_nhe(re_nhe, afi); | |
98cda54a | 3165 | if (!nhe) { |
98cda54a SW |
3166 | char buf2[PREFIX_STRLEN] = ""; |
3167 | ||
3168 | flog_err( | |
3169 | EC_ZEBRA_TABLE_LOOKUP_FAILED, | |
2dbe669b DA |
3170 | "Zebra failed to find or create a nexthop hash entry for %pFX%s%s", |
3171 | p, src_p ? " from " : "", | |
98cda54a SW |
3172 | src_p ? prefix2str(src_p, buf2, sizeof(buf2)) |
3173 | : ""); | |
3174 | ||
98cda54a SW |
3175 | return -1; |
3176 | } | |
98cda54a SW |
3177 | } |
3178 | ||
4b87c90d SW |
3179 | /* |
3180 | * Attach the re to the nhe's nexthop group. | |
3181 | * | |
3182 | * TODO: This will need to change when we start getting IDs from upper | |
3183 | * level protocols, as the refcnt might be wrong, since it checks | |
3184 | * if old_id != new_id. | |
3185 | */ | |
5463ce26 | 3186 | route_entry_update_nhe(re, nhe); |
98cda54a | 3187 | |
d62a17ae | 3188 | /* Make it sure prefixlen is applied to the prefix. */ |
3189 | apply_mask(p); | |
3190 | if (src_p) | |
3191 | apply_mask_ipv6(src_p); | |
718e3744 | 3192 | |
d62a17ae | 3193 | /* Set default distance by route type. */ |
eea2ef07 | 3194 | if (re->distance == 0) |
0492eea0 | 3195 | re->distance = route_distance(re->type); |
718e3744 | 3196 | |
d62a17ae | 3197 | /* Lookup route node.*/ |
3198 | rn = srcdest_rnode_get(table, p, src_p); | |
718e3744 | 3199 | |
40ecd8e4 DS |
3200 | /* |
3201 | * If same type of route are installed, treat it as a implicit | |
9db35a5e | 3202 | * withdraw. If the user has specified the No route replace semantics |
40ecd8e4 DS |
3203 | * for the install don't do a route replace. |
3204 | */ | |
a2addae8 | 3205 | RNODE_FOREACH_RE (rn, same) { |
0ca6f3b1 MS |
3206 | if (CHECK_FLAG(same->status, ROUTE_ENTRY_REMOVED)) { |
3207 | same_count++; | |
d62a17ae | 3208 | continue; |
0ca6f3b1 | 3209 | } |
41ec9222 | 3210 | |
9db35a5e | 3211 | /* Compare various route_entry properties */ |
0ca6f3b1 MS |
3212 | if (rib_compare_routes(re, same)) { |
3213 | same_count++; | |
3214 | ||
3215 | if (first_same == NULL) | |
3216 | first_same = same; | |
3217 | } | |
d62a17ae | 3218 | } |
718e3744 | 3219 | |
0ca6f3b1 MS |
3220 | same = first_same; |
3221 | ||
cf363e1b MS |
3222 | /* If this route is kernel/connected route, notify the dataplane. */ |
3223 | if (RIB_SYSTEM_ROUTE(re)) { | |
3224 | /* Notify dataplane */ | |
3225 | dplane_sys_route_add(rn, re); | |
3226 | } | |
3227 | ||
d62a17ae | 3228 | /* Link new re to node.*/ |
3229 | if (IS_ZEBRA_DEBUG_RIB) { | |
2da33d6b | 3230 | rnode_debug(rn, re->vrf_id, |
0ca6f3b1 MS |
3231 | "Inserting route rn %p, re %p (%s) existing %p, same_count %d", |
3232 | rn, re, zebra_route_string(re->type), same, | |
3233 | same_count); | |
718e3744 | 3234 | |
d62a17ae | 3235 | if (IS_ZEBRA_DEBUG_RIB_DETAILED) |
3236 | route_entry_dump(p, src_p, re); | |
718e3744 | 3237 | } |
6883bf8d DS |
3238 | |
3239 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
d62a17ae | 3240 | rib_addnode(rn, re, 1); |
3241 | ret = 1; | |
6b0655a2 | 3242 | |
d62a17ae | 3243 | /* Free implicit route.*/ |
1d48702e | 3244 | if (same) |
d62a17ae | 3245 | rib_delnode(rn, same); |
718e3744 | 3246 | |
0ca6f3b1 MS |
3247 | /* See if we can remove some RE entries that are queued for |
3248 | * removal, but won't be considered in rib processing. | |
3249 | */ | |
3250 | dest = rib_dest_from_rnode(rn); | |
3251 | RNODE_FOREACH_RE_SAFE (rn, re, same) { | |
3252 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) { | |
3253 | /* If the route was used earlier, must retain it. */ | |
3254 | if (dest && re == dest->selected_fib) | |
3255 | continue; | |
3256 | ||
3257 | if (IS_ZEBRA_DEBUG_RIB) | |
3258 | rnode_debug(rn, re->vrf_id, "rn %p, removing unneeded re %p", | |
3259 | rn, re); | |
3260 | ||
3261 | rib_unlink(rn, re); | |
3262 | } | |
3263 | } | |
3264 | ||
d62a17ae | 3265 | route_unlock_node(rn); |
3266 | return ret; | |
3267 | } | |
3268 | ||
1d48702e MS |
3269 | /* |
3270 | * Add a single route. | |
3271 | */ | |
3272 | int rib_add_multipath(afi_t afi, safi_t safi, struct prefix *p, | |
3273 | struct prefix_ipv6 *src_p, struct route_entry *re, | |
3274 | struct nexthop_group *ng) | |
3275 | { | |
3276 | int ret; | |
377e29f7 | 3277 | struct nhg_hash_entry nhe; |
1d48702e MS |
3278 | |
3279 | if (!re) | |
3280 | return -1; | |
3281 | ||
3282 | /* We either need nexthop(s) or an existing nexthop id */ | |
3283 | if (ng == NULL && re->nhe_id == 0) | |
3284 | return -1; | |
3285 | ||
3286 | /* | |
3287 | * Use a temporary nhe to convey info to the common/main api. | |
3288 | */ | |
377e29f7 | 3289 | zebra_nhe_init(&nhe, afi, (ng ? ng->nexthop : NULL)); |
1d48702e MS |
3290 | if (ng) |
3291 | nhe.nhg.nexthop = ng->nexthop; | |
3292 | else if (re->nhe_id > 0) | |
3293 | nhe.id = re->nhe_id; | |
3294 | ||
3295 | ret = rib_add_multipath_nhe(afi, safi, p, src_p, re, &nhe); | |
3296 | ||
3297 | /* In this path, the callers expect memory to be freed. */ | |
3298 | nexthop_group_delete(&ng); | |
3299 | ||
3300 | /* In error cases, free the route also */ | |
3301 | if (ret < 0) | |
3302 | XFREE(MTYPE_RE, re); | |
3303 | ||
3304 | return ret; | |
3305 | } | |
3306 | ||
d62a17ae | 3307 | void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
acde7f6b | 3308 | unsigned short instance, uint32_t flags, struct prefix *p, |
fd36be7e | 3309 | struct prefix_ipv6 *src_p, const struct nexthop *nh, |
bc541126 | 3310 | uint32_t nhe_id, uint32_t table_id, uint32_t metric, |
3ceae22b | 3311 | uint8_t distance, bool fromkernel) |
d62a17ae | 3312 | { |
3313 | struct route_table *table; | |
3314 | struct route_node *rn; | |
3315 | struct route_entry *re; | |
3316 | struct route_entry *fib = NULL; | |
3317 | struct route_entry *same = NULL; | |
fd36be7e | 3318 | struct nexthop *rtnh; |
d62a17ae | 3319 | char buf2[INET6_ADDRSTRLEN]; |
5f7a4718 | 3320 | rib_dest_t *dest; |
d62a17ae | 3321 | |
1f610a1f | 3322 | assert(!src_p || !src_p->prefixlen || afi == AFI_IP6); |
d62a17ae | 3323 | |
3324 | /* Lookup table. */ | |
c7c0b007 SW |
3325 | table = zebra_vrf_lookup_table_with_table_id(afi, safi, vrf_id, |
3326 | table_id); | |
d62a17ae | 3327 | if (!table) |
3328 | return; | |
3329 | ||
3330 | /* Apply mask. */ | |
3331 | apply_mask(p); | |
3332 | if (src_p) | |
3333 | apply_mask_ipv6(src_p); | |
3334 | ||
3335 | /* Lookup route node. */ | |
3336 | rn = srcdest_rnode_lookup(table, p, src_p); | |
3337 | if (!rn) { | |
82d7d0e2 | 3338 | if (IS_ZEBRA_DEBUG_RIB) { |
82144f53 | 3339 | char src_buf[PREFIX_STRLEN]; |
82d7d0e2 DS |
3340 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); |
3341 | ||
82144f53 DS |
3342 | if (src_p && src_p->prefixlen) |
3343 | prefix2str(src_p, src_buf, sizeof(src_buf)); | |
3344 | else | |
3345 | src_buf[0] = '\0'; | |
3346 | ||
2dbe669b DA |
3347 | zlog_debug("%s[%d]:%pFX%s%s doesn't exist in rib", |
3348 | vrf->name, table_id, p, | |
d62a17ae | 3349 | (src_buf[0] != '\0') ? " from " : "", |
3350 | src_buf); | |
82d7d0e2 | 3351 | } |
d62a17ae | 3352 | return; |
3353 | } | |
718e3744 | 3354 | |
5f7a4718 DS |
3355 | dest = rib_dest_from_rnode(rn); |
3356 | fib = dest->selected_fib; | |
3357 | ||
d62a17ae | 3358 | /* Lookup same type route. */ |
a2addae8 | 3359 | RNODE_FOREACH_RE (rn, re) { |
d62a17ae | 3360 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
3361 | continue; | |
3362 | ||
d62a17ae | 3363 | if (re->type != type) |
3364 | continue; | |
3365 | if (re->instance != instance) | |
3366 | continue; | |
40ecd8e4 DS |
3367 | if (CHECK_FLAG(re->flags, ZEBRA_FLAG_RR_USE_DISTANCE) && |
3368 | distance != re->distance) | |
3369 | continue; | |
3370 | ||
996c9314 | 3371 | if (re->type == ZEBRA_ROUTE_KERNEL && re->metric != metric) |
f19435a8 | 3372 | continue; |
0eb97b86 | 3373 | if (re->type == ZEBRA_ROUTE_CONNECT && |
c415d895 | 3374 | (rtnh = re->nhe->nhg.nexthop) |
fd36be7e DL |
3375 | && rtnh->type == NEXTHOP_TYPE_IFINDEX && nh) { |
3376 | if (rtnh->ifindex != nh->ifindex) | |
d62a17ae | 3377 | continue; |
d62a17ae | 3378 | same = re; |
3379 | break; | |
3380 | } | |
fec211ad | 3381 | |
d62a17ae | 3382 | /* Make sure that the route found has the same gateway. */ |
fec211ad | 3383 | if (nhe_id && re->nhe_id == nhe_id) { |
bc541126 SW |
3384 | same = re; |
3385 | break; | |
fec211ad SW |
3386 | } |
3387 | ||
3388 | if (nh == NULL) { | |
3389 | same = re; | |
3390 | break; | |
3391 | } | |
c415d895 | 3392 | for (ALL_NEXTHOPS(re->nhe->nhg, rtnh)) { |
fec211ad SW |
3393 | /* |
3394 | * No guarantee all kernel send nh with labels | |
3395 | * on delete. | |
3396 | */ | |
3397 | if (nexthop_same_no_labels(rtnh, nh)) { | |
d62a17ae | 3398 | same = re; |
3399 | break; | |
3400 | } | |
d62a17ae | 3401 | } |
fec211ad SW |
3402 | |
3403 | if (same) | |
3404 | break; | |
d62a17ae | 3405 | } |
3406 | /* If same type of route can't be found and this message is from | |
3407 | kernel. */ | |
3408 | if (!same) { | |
5dfeba19 DS |
3409 | /* |
3410 | * In the past(HA!) we could get here because | |
3411 | * we were receiving a route delete from the | |
3412 | * kernel and we're not marking the proto | |
3413 | * as coming from it's appropriate originator. | |
3414 | * Now that we are properly noticing the fact | |
3415 | * that the kernel has deleted our route we | |
3416 | * are not going to get called in this path | |
3417 | * I am going to leave this here because | |
3418 | * this might still work this way on non-linux | |
3419 | * platforms as well as some weird state I have | |
3420 | * not properly thought of yet. | |
3421 | * If we can show that this code path is | |
3422 | * dead then we can remove it. | |
3423 | */ | |
b8faa875 | 3424 | if (fib && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE)) { |
d62a17ae | 3425 | if (IS_ZEBRA_DEBUG_RIB) { |
2da33d6b DS |
3426 | rnode_debug(rn, vrf_id, |
3427 | "rn %p, re %p (%s) was deleted from kernel, adding", | |
3428 | rn, fib, | |
3429 | zebra_route_string(fib->type)); | |
d62a17ae | 3430 | } |
9271987f DS |
3431 | if (allow_delete |
3432 | || CHECK_FLAG(dest->flags, RIB_ROUTE_ANY_QUEUED)) { | |
677c1dd5 | 3433 | UNSET_FLAG(fib->status, ROUTE_ENTRY_INSTALLED); |
d62a17ae | 3434 | /* Unset flags. */ |
c415d895 | 3435 | for (rtnh = fib->nhe->nhg.nexthop; rtnh; |
fd36be7e DL |
3436 | rtnh = rtnh->next) |
3437 | UNSET_FLAG(rtnh->flags, | |
d62a17ae | 3438 | NEXTHOP_FLAG_FIB); |
3439 | ||
ed216282 DS |
3440 | /* |
3441 | * This is a non FRR route | |
3442 | * as such we should mark | |
3443 | * it as deleted | |
3444 | */ | |
5f7a4718 | 3445 | dest->selected_fib = NULL; |
d62a17ae | 3446 | } else { |
3447 | /* This means someone else, other than Zebra, | |
3448 | * has deleted | |
3449 | * a Zebra router from the kernel. We will add | |
3450 | * it back */ | |
3451 | rib_install_kernel(rn, fib, NULL); | |
3452 | } | |
3453 | } else { | |
3454 | if (IS_ZEBRA_DEBUG_RIB) { | |
fd36be7e | 3455 | if (nh) |
d62a17ae | 3456 | rnode_debug( |
3457 | rn, vrf_id, | |
3efd0893 | 3458 | "via %s ifindex %d type %d doesn't exist in rib", |
36228974 | 3459 | inet_ntop(afi2family(afi), |
3460 | &nh->gate, buf2, | |
3461 | sizeof(buf2)), | |
3462 | nh->ifindex, type); | |
d62a17ae | 3463 | else |
3464 | rnode_debug( | |
3465 | rn, vrf_id, | |
fd36be7e DL |
3466 | "type %d doesn't exist in rib", |
3467 | type); | |
d62a17ae | 3468 | } |
3469 | route_unlock_node(rn); | |
3470 | return; | |
3471 | } | |
3472 | } | |
718e3744 | 3473 | |
5dfeba19 | 3474 | if (same) { |
996c9314 LB |
3475 | if (fromkernel && CHECK_FLAG(flags, ZEBRA_FLAG_SELFROUTE) |
3476 | && !allow_delete) { | |
5dfeba19 DS |
3477 | rib_install_kernel(rn, same, NULL); |
3478 | route_unlock_node(rn); | |
3479 | ||
3480 | return; | |
3481 | } | |
6134fd82 | 3482 | |
2b83602b | 3483 | /* Special handling for IPv4 or IPv6 routes sourced from |
3484 | * EVPN - the nexthop (and associated MAC) need to be | |
3485 | * uninstalled if no more refs. | |
3486 | */ | |
90264d64 | 3487 | if (CHECK_FLAG(flags, ZEBRA_FLAG_EVPN_ROUTE)) { |
6134fd82 | 3488 | struct nexthop *tmp_nh; |
3489 | ||
c415d895 | 3490 | for (ALL_NEXTHOPS(re->nhe->nhg, tmp_nh)) { |
6134fd82 | 3491 | struct ipaddr vtep_ip; |
3492 | ||
3493 | memset(&vtep_ip, 0, sizeof(struct ipaddr)); | |
1ec31309 | 3494 | if (afi == AFI_IP) { |
3495 | vtep_ip.ipa_type = IPADDR_V4; | |
3496 | memcpy(&(vtep_ip.ipaddr_v4), | |
3497 | &(tmp_nh->gate.ipv4), | |
3498 | sizeof(struct in_addr)); | |
3499 | } else { | |
3500 | vtep_ip.ipa_type = IPADDR_V6; | |
3501 | memcpy(&(vtep_ip.ipaddr_v6), | |
3502 | &(tmp_nh->gate.ipv6), | |
3503 | sizeof(struct in6_addr)); | |
3504 | } | |
a317a9b9 | 3505 | zebra_vxlan_evpn_vrf_route_del(re->vrf_id, |
6134fd82 | 3506 | &vtep_ip, p); |
3507 | } | |
3508 | } | |
cf363e1b MS |
3509 | |
3510 | /* Notify dplane if system route changes */ | |
3511 | if (RIB_SYSTEM_ROUTE(re)) | |
3512 | dplane_sys_route_del(rn, same); | |
3513 | ||
d62a17ae | 3514 | rib_delnode(rn, same); |
5dfeba19 | 3515 | } |
05737783 | 3516 | |
d62a17ae | 3517 | route_unlock_node(rn); |
3518 | return; | |
3519 | } | |
718e3744 | 3520 | |
718e3744 | 3521 | |
d7c0a89a | 3522 | int rib_add(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type, |
acde7f6b | 3523 | unsigned short instance, uint32_t flags, struct prefix *p, |
d7c0a89a | 3524 | struct prefix_ipv6 *src_p, const struct nexthop *nh, |
8032b717 SW |
3525 | uint32_t nhe_id, uint32_t table_id, uint32_t metric, uint32_t mtu, |
3526 | uint8_t distance, route_tag_t tag) | |
d62a17ae | 3527 | { |
bbb322f2 SW |
3528 | struct route_entry *re = NULL; |
3529 | struct nexthop *nexthop = NULL; | |
0eb97b86 | 3530 | struct nexthop_group *ng = NULL; |
718e3744 | 3531 | |
66af6845 | 3532 | /* Allocate new route_entry structure. */ |
d62a17ae | 3533 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); |
d62a17ae | 3534 | re->type = type; |
3535 | re->instance = instance; | |
3536 | re->distance = distance; | |
3537 | re->flags = flags; | |
3538 | re->metric = metric; | |
3539 | re->mtu = mtu; | |
3540 | re->table = table_id; | |
3541 | re->vrf_id = vrf_id; | |
98572489 | 3542 | re->uptime = monotime(NULL); |
4e40b6d6 | 3543 | re->tag = tag; |
bbb322f2 SW |
3544 | re->nhe_id = nhe_id; |
3545 | ||
0eb97b86 MS |
3546 | /* If the owner of the route supplies a shared nexthop-group id, |
3547 | * we'll use that. Otherwise, pass the nexthop along directly. | |
3548 | */ | |
e22e8001 | 3549 | if (!nhe_id) { |
0eb97b86 | 3550 | ng = nexthop_group_new(); |
d62a17ae | 3551 | |
e22e8001 SW |
3552 | /* Add nexthop. */ |
3553 | nexthop = nexthop_new(); | |
3554 | *nexthop = *nh; | |
0eb97b86 | 3555 | nexthop_group_add_sorted(ng, nexthop); |
e22e8001 | 3556 | } |
718e3744 | 3557 | |
0eb97b86 | 3558 | return rib_add_multipath(afi, safi, p, src_p, re, ng); |
718e3744 | 3559 | } |
3560 | ||
91e6f25b | 3561 | static const char *rib_update_event2str(enum rib_update_event event) |
2a99ab95 SW |
3562 | { |
3563 | const char *ret = "UNKNOWN"; | |
3564 | ||
3565 | switch (event) { | |
3566 | case RIB_UPDATE_KERNEL: | |
3567 | ret = "RIB_UPDATE_KERNEL"; | |
3568 | break; | |
3569 | case RIB_UPDATE_RMAP_CHANGE: | |
3570 | ret = "RIB_UPDATE_RMAP_CHANGE"; | |
3571 | break; | |
3572 | case RIB_UPDATE_OTHER: | |
3573 | ret = "RIB_UPDATE_OTHER"; | |
3574 | break; | |
3575 | case RIB_UPDATE_MAX: | |
3576 | break; | |
3577 | } | |
3578 | ||
3579 | return ret; | |
3580 | } | |
3581 | ||
3582 | ||
3583 | /* Schedule route nodes to be processed if they match the type */ | |
3584 | static void rib_update_route_node(struct route_node *rn, int type) | |
3585 | { | |
3586 | struct route_entry *re, *next; | |
3587 | bool re_changed = false; | |
3588 | ||
3589 | RNODE_FOREACH_RE_SAFE (rn, re, next) { | |
3590 | if (type == ZEBRA_ROUTE_ALL || type == re->type) { | |
3591 | SET_FLAG(re->status, ROUTE_ENTRY_CHANGED); | |
3592 | re_changed = true; | |
3593 | } | |
3594 | } | |
3595 | ||
3596 | if (re_changed) | |
3597 | rib_queue_add(rn); | |
3598 | } | |
3599 | ||
1c848137 | 3600 | /* Schedule routes of a particular table (address-family) based on event. */ |
54aeba35 DS |
3601 | void rib_update_table(struct route_table *table, enum rib_update_event event, |
3602 | int rtype) | |
d62a17ae | 3603 | { |
3604 | struct route_node *rn; | |
2a99ab95 SW |
3605 | |
3606 | if (IS_ZEBRA_DEBUG_EVENT) { | |
3607 | struct zebra_vrf *zvrf; | |
3608 | struct vrf *vrf; | |
3609 | ||
630d5962 DS |
3610 | zvrf = table->info |
3611 | ? ((struct rib_table_info *)table->info)->zvrf | |
3612 | : NULL; | |
2a99ab95 SW |
3613 | vrf = zvrf ? zvrf->vrf : NULL; |
3614 | ||
54aeba35 | 3615 | zlog_debug("%s: %s VRF %s Table %u event %s Route type: %s", __func__, |
2a99ab95 | 3616 | table->info ? afi2str( |
630d5962 | 3617 | ((struct rib_table_info *)table->info)->afi) |
2a99ab95 | 3618 | : "Unknown", |
bd47f3a3 | 3619 | VRF_LOGNAME(vrf), zvrf ? zvrf->table_id : 0, |
54aeba35 | 3620 | rib_update_event2str(event), zebra_route_string(rtype)); |
2a99ab95 | 3621 | } |
d62a17ae | 3622 | |
3623 | /* Walk all routes and queue for processing, if appropriate for | |
3624 | * the trigger event. | |
3625 | */ | |
3626 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { | |
1ca60f2c DS |
3627 | /* |
3628 | * If we are looking at a route node and the node | |
3629 | * has already been queued we don't | |
3630 | * need to queue it up again | |
3631 | */ | |
2a99ab95 SW |
3632 | if (rn->info |
3633 | && CHECK_FLAG(rib_dest_from_rnode(rn)->flags, | |
3634 | RIB_ROUTE_ANY_QUEUED)) | |
1ca60f2c | 3635 | continue; |
2a99ab95 | 3636 | |
d62a17ae | 3637 | switch (event) { |
2a99ab95 SW |
3638 | case RIB_UPDATE_KERNEL: |
3639 | rib_update_route_node(rn, ZEBRA_ROUTE_KERNEL); | |
3640 | break; | |
d62a17ae | 3641 | case RIB_UPDATE_RMAP_CHANGE: |
3642 | case RIB_UPDATE_OTHER: | |
54aeba35 | 3643 | rib_update_route_node(rn, rtype); |
d62a17ae | 3644 | break; |
d62a17ae | 3645 | default: |
3646 | break; | |
3647 | } | |
3648 | } | |
b84c7253 | 3649 | } |
3650 | ||
54aeba35 DS |
3651 | static void rib_update_handle_vrf(vrf_id_t vrf_id, enum rib_update_event event, |
3652 | int rtype) | |
718e3744 | 3653 | { |
d62a17ae | 3654 | struct route_table *table; |
1c848137 | 3655 | |
2a99ab95 SW |
3656 | if (IS_ZEBRA_DEBUG_EVENT) |
3657 | zlog_debug("%s: Handling VRF %s event %s", __func__, | |
3658 | vrf_id_to_name(vrf_id), rib_update_event2str(event)); | |
3659 | ||
d62a17ae | 3660 | /* Process routes of interested address-families. */ |
3661 | table = zebra_vrf_table(AFI_IP, SAFI_UNICAST, vrf_id); | |
2a99ab95 | 3662 | if (table) |
54aeba35 | 3663 | rib_update_table(table, event, rtype); |
718e3744 | 3664 | |
d62a17ae | 3665 | table = zebra_vrf_table(AFI_IP6, SAFI_UNICAST, vrf_id); |
2a99ab95 | 3666 | if (table) |
54aeba35 | 3667 | rib_update_table(table, event, rtype); |
2a99ab95 SW |
3668 | } |
3669 | ||
54aeba35 | 3670 | static void rib_update_handle_vrf_all(enum rib_update_event event, int rtype) |
2a99ab95 SW |
3671 | { |
3672 | struct zebra_router_table *zrt; | |
3673 | ||
3674 | if (IS_ZEBRA_DEBUG_EVENT) | |
3675 | zlog_debug("%s: Handling VRF (ALL) event %s", __func__, | |
3676 | rib_update_event2str(event)); | |
3677 | ||
3678 | /* Just iterate over all the route tables, rather than vrf lookups */ | |
3679 | RB_FOREACH (zrt, zebra_router_table_head, &zrouter.tables) | |
54aeba35 | 3680 | rib_update_table(zrt->table, event, rtype); |
2a99ab95 SW |
3681 | } |
3682 | ||
3683 | struct rib_update_ctx { | |
91e6f25b | 3684 | enum rib_update_event event; |
2a99ab95 SW |
3685 | bool vrf_all; |
3686 | vrf_id_t vrf_id; | |
3687 | }; | |
3688 | ||
3689 | static struct rib_update_ctx *rib_update_ctx_init(vrf_id_t vrf_id, | |
91e6f25b | 3690 | enum rib_update_event event) |
2a99ab95 SW |
3691 | { |
3692 | struct rib_update_ctx *ctx; | |
3693 | ||
3694 | ctx = XCALLOC(MTYPE_RIB_UPDATE_CTX, sizeof(struct rib_update_ctx)); | |
3695 | ||
3696 | ctx->event = event; | |
3697 | ctx->vrf_id = vrf_id; | |
3698 | ||
3699 | return ctx; | |
3700 | } | |
3701 | ||
3702 | static void rib_update_ctx_fini(struct rib_update_ctx **ctx) | |
3703 | { | |
3704 | XFREE(MTYPE_RIB_UPDATE_CTX, *ctx); | |
2a99ab95 SW |
3705 | } |
3706 | ||
3707 | static int rib_update_handler(struct thread *thread) | |
3708 | { | |
3709 | struct rib_update_ctx *ctx; | |
3710 | ||
3711 | ctx = THREAD_ARG(thread); | |
3712 | ||
3713 | if (ctx->vrf_all) | |
54aeba35 | 3714 | rib_update_handle_vrf_all(ctx->event, ZEBRA_ROUTE_ALL); |
2a99ab95 | 3715 | else |
54aeba35 | 3716 | rib_update_handle_vrf(ctx->vrf_id, ctx->event, ZEBRA_ROUTE_ALL); |
2a99ab95 SW |
3717 | |
3718 | rib_update_ctx_fini(&ctx); | |
3719 | ||
3720 | return 0; | |
3721 | } | |
3722 | ||
3723 | /* | |
3724 | * Thread list to ensure we don't schedule a ton of events | |
3725 | * if interfaces are flapping for instance. | |
3726 | */ | |
3727 | static struct thread *t_rib_update_threads[RIB_UPDATE_MAX]; | |
3728 | ||
2a99ab95 | 3729 | /* Schedule a RIB update event for all vrfs */ |
91e6f25b | 3730 | void rib_update(enum rib_update_event event) |
2a99ab95 SW |
3731 | { |
3732 | struct rib_update_ctx *ctx; | |
3733 | ||
3734 | ctx = rib_update_ctx_init(0, event); | |
3735 | ||
3736 | ctx->vrf_all = true; | |
3737 | ||
3738 | if (!thread_add_event(zrouter.master, rib_update_handler, ctx, 0, | |
3739 | &t_rib_update_threads[event])) | |
3740 | rib_update_ctx_fini(&ctx); /* Already scheduled */ | |
3741 | else if (IS_ZEBRA_DEBUG_EVENT) | |
05267678 | 3742 | zlog_debug("%s: Scheduled VRF (ALL), event %s", __func__, |
2a99ab95 | 3743 | rib_update_event2str(event)); |
718e3744 | 3744 | } |
3745 | ||
718e3744 | 3746 | /* Delete self installed routes after zebra is relaunched. */ |
95a29032 | 3747 | void rib_sweep_table(struct route_table *table) |
d62a17ae | 3748 | { |
3749 | struct route_node *rn; | |
3750 | struct route_entry *re; | |
3751 | struct route_entry *next; | |
915902cb | 3752 | struct nexthop *nexthop; |
d62a17ae | 3753 | |
915902cb DS |
3754 | if (!table) |
3755 | return; | |
d62a17ae | 3756 | |
6d81b590 MS |
3757 | if (IS_ZEBRA_DEBUG_RIB) |
3758 | zlog_debug("%s: starting", __func__); | |
3759 | ||
915902cb | 3760 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
a2addae8 | 3761 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d4644d41 | 3762 | |
915902cb DS |
3763 | if (IS_ZEBRA_DEBUG_RIB) |
3764 | route_entry_dump(&rn->p, NULL, re); | |
3765 | ||
3766 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
3767 | continue; | |
3768 | ||
3769 | if (!CHECK_FLAG(re->flags, ZEBRA_FLAG_SELFROUTE)) | |
3770 | continue; | |
3771 | ||
d4644d41 DS |
3772 | /* |
3773 | * If routes are older than startup_time then | |
3774 | * we know we read them in from the kernel. | |
3775 | * As such we can safely remove them. | |
3776 | */ | |
3777 | if (zrouter.startup_time < re->uptime) | |
3778 | continue; | |
3779 | ||
915902cb DS |
3780 | /* |
3781 | * So we are starting up and have received | |
3782 | * routes from the kernel that we have installed | |
3783 | * from a previous run of zebra but not cleaned | |
3784 | * up ( say a kill -9 ) | |
3785 | * But since we haven't actually installed | |
3786 | * them yet( we received them from the kernel ) | |
3787 | * we don't think they are active. | |
3788 | * So let's pretend they are active to actually | |
3789 | * remove them. | |
3790 | * In all honesty I'm not sure if we should | |
3791 | * mark them as active when we receive them | |
3792 | * This is startup only so probably ok. | |
3793 | * | |
3794 | * If we ever decide to move rib_sweep_table | |
3795 | * to a different spot (ie startup ) | |
3796 | * this decision needs to be revisited | |
3797 | */ | |
677c1dd5 | 3798 | SET_FLAG(re->status, ROUTE_ENTRY_INSTALLED); |
c415d895 | 3799 | for (ALL_NEXTHOPS(re->nhe->nhg, nexthop)) |
915902cb DS |
3800 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); |
3801 | ||
0c555cc6 DS |
3802 | rib_uninstall_kernel(rn, re); |
3803 | rib_delnode(rn, re); | |
915902cb DS |
3804 | } |
3805 | } | |
6d81b590 MS |
3806 | |
3807 | if (IS_ZEBRA_DEBUG_RIB) | |
3808 | zlog_debug("%s: ends", __func__); | |
718e3744 | 3809 | } |
3810 | ||
3811 | /* Sweep all RIB tables. */ | |
d4644d41 | 3812 | int rib_sweep_route(struct thread *t) |
718e3744 | 3813 | { |
d62a17ae | 3814 | struct vrf *vrf; |
3815 | struct zebra_vrf *zvrf; | |
78104b9b | 3816 | |
a2addae8 | 3817 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
915902cb DS |
3818 | if ((zvrf = vrf->info) == NULL) |
3819 | continue; | |
3820 | ||
d62a17ae | 3821 | rib_sweep_table(zvrf->table[AFI_IP][SAFI_UNICAST]); |
3822 | rib_sweep_table(zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3823 | } | |
95a29032 | 3824 | |
89272910 | 3825 | zebra_router_sweep_route(); |
38e40db1 | 3826 | zebra_router_sweep_nhgs(); |
d4644d41 DS |
3827 | |
3828 | return 0; | |
718e3744 | 3829 | } |
2ea1ab1c VT |
3830 | |
3831 | /* Remove specific by protocol routes from 'table'. */ | |
d7c0a89a | 3832 | unsigned long rib_score_proto_table(uint8_t proto, unsigned short instance, |
47a08aa9 | 3833 | struct route_table *table) |
d62a17ae | 3834 | { |
3835 | struct route_node *rn; | |
3836 | struct route_entry *re; | |
3837 | struct route_entry *next; | |
3838 | unsigned long n = 0; | |
3839 | ||
3840 | if (table) | |
3841 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) | |
a2addae8 | 3842 | RNODE_FOREACH_RE_SAFE (rn, re, next) { |
d62a17ae | 3843 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
3844 | continue; | |
3845 | if (re->type == proto | |
3846 | && re->instance == instance) { | |
3847 | rib_delnode(rn, re); | |
3848 | n++; | |
3849 | } | |
3850 | } | |
3851 | return n; | |
2ea1ab1c VT |
3852 | } |
3853 | ||
3854 | /* Remove specific by protocol routes. */ | |
d7c0a89a | 3855 | unsigned long rib_score_proto(uint8_t proto, unsigned short instance) |
2ea1ab1c | 3856 | { |
d62a17ae | 3857 | struct vrf *vrf; |
3858 | struct zebra_vrf *zvrf; | |
d8612e65 | 3859 | struct other_route_table *ort; |
d62a17ae | 3860 | unsigned long cnt = 0; |
78104b9b | 3861 | |
d8612e65 DS |
3862 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
3863 | zvrf = vrf->info; | |
3864 | if (!zvrf) | |
3865 | continue; | |
78104b9b | 3866 | |
d8612e65 DS |
3867 | cnt += rib_score_proto_table(proto, instance, |
3868 | zvrf->table[AFI_IP][SAFI_UNICAST]) | |
3869 | + rib_score_proto_table( | |
3870 | proto, instance, | |
3871 | zvrf->table[AFI_IP6][SAFI_UNICAST]); | |
3872 | ||
81fddbe7 | 3873 | frr_each(otable, &zvrf->other_tables, ort) cnt += |
d8612e65 DS |
3874 | rib_score_proto_table(proto, instance, ort->table); |
3875 | } | |
47a08aa9 | 3876 | |
d62a17ae | 3877 | return cnt; |
2ea1ab1c VT |
3878 | } |
3879 | ||
718e3744 | 3880 | /* Close RIB and clean up kernel routes. */ |
d62a17ae | 3881 | void rib_close_table(struct route_table *table) |
718e3744 | 3882 | { |
d62a17ae | 3883 | struct route_node *rn; |
630d5962 | 3884 | struct rib_table_info *info; |
5f7a4718 | 3885 | rib_dest_t *dest; |
718e3744 | 3886 | |
1e9f448f DS |
3887 | if (!table) |
3888 | return; | |
9fd92e3c | 3889 | |
6ca30e9e | 3890 | info = route_table_get_info(table); |
5adc2528 | 3891 | |
5f7a4718 DS |
3892 | for (rn = route_top(table); rn; rn = srcdest_route_next(rn)) { |
3893 | dest = rib_dest_from_rnode(rn); | |
1e9f448f | 3894 | |
5f7a4718 | 3895 | if (dest && dest->selected_fib) { |
1e9f448f DS |
3896 | if (info->safi == SAFI_UNICAST) |
3897 | hook_call(rib_update, rn, NULL); | |
3898 | ||
3cdba47a DS |
3899 | rib_uninstall_kernel(rn, dest->selected_fib); |
3900 | dest->selected_fib = NULL; | |
1e9f448f | 3901 | } |
5f7a4718 | 3902 | } |
718e3744 | 3903 | } |
3904 | ||
9bd9717b MS |
3905 | /* |
3906 | * Handler for async dataplane results after a pseudowire installation | |
3907 | */ | |
3908 | static int handle_pw_result(struct zebra_dplane_ctx *ctx) | |
3909 | { | |
9bd9717b MS |
3910 | struct zebra_pw *pw; |
3911 | struct zebra_vrf *vrf; | |
3912 | ||
3913 | /* The pseudowire code assumes success - we act on an error | |
3914 | * result for installation attempts here. | |
3915 | */ | |
3916 | if (dplane_ctx_get_op(ctx) != DPLANE_OP_PW_INSTALL) | |
3917 | goto done; | |
3918 | ||
3919 | if (dplane_ctx_get_status(ctx) != ZEBRA_DPLANE_REQUEST_SUCCESS) { | |
3920 | vrf = zebra_vrf_lookup_by_id(dplane_ctx_get_vrf(ctx)); | |
7c7ef4a8 | 3921 | pw = zebra_pw_find(vrf, dplane_ctx_get_ifname(ctx)); |
9bd9717b | 3922 | if (pw) |
fd563cc7 KS |
3923 | zebra_pw_install_failure(pw, |
3924 | dplane_ctx_get_pw_status(ctx)); | |
9bd9717b MS |
3925 | } |
3926 | ||
3927 | done: | |
a20e6c32 | 3928 | dplane_ctx_fini(&ctx); |
9bd9717b | 3929 | |
9f2d0354 | 3930 | return 0; |
9bd9717b MS |
3931 | } |
3932 | ||
3933 | ||
7cdb1a84 | 3934 | /* |
d37f4d6c MS |
3935 | * Handle results from the dataplane system. Dequeue update context |
3936 | * structs, dispatch to appropriate internal handlers. | |
7cdb1a84 MS |
3937 | */ |
3938 | static int rib_process_dplane_results(struct thread *thread) | |
3939 | { | |
25779064 | 3940 | struct zebra_dplane_ctx *ctx; |
4c206c8f | 3941 | struct dplane_ctx_q ctxlist; |
2fc69f03 | 3942 | bool shut_p = false; |
4c206c8f MS |
3943 | |
3944 | /* Dequeue a list of completed updates with one lock/unlock cycle */ | |
7cdb1a84 MS |
3945 | |
3946 | do { | |
4c206c8f MS |
3947 | TAILQ_INIT(&ctxlist); |
3948 | ||
7cdb1a84 | 3949 | /* Take lock controlling queue of results */ |
00dffa8c | 3950 | frr_with_mutex(&dplane_mutex) { |
d37f4d6c | 3951 | /* Dequeue list of context structs */ |
4c206c8f | 3952 | dplane_ctx_list_append(&ctxlist, &rib_dplane_q); |
7cdb1a84 | 3953 | } |
7cdb1a84 | 3954 | |
4c206c8f MS |
3955 | /* Dequeue context block */ |
3956 | ctx = dplane_ctx_dequeue(&ctxlist); | |
3957 | ||
3958 | /* If we've emptied the results queue, we're done */ | |
3959 | if (ctx == NULL) | |
7cdb1a84 | 3960 | break; |
7cdb1a84 | 3961 | |
2fc69f03 MS |
3962 | /* If zebra is shutting down, avoid processing results, |
3963 | * just drain the results queue. | |
3964 | */ | |
3965 | shut_p = atomic_load_explicit(&zrouter.in_shutdown, | |
3966 | memory_order_relaxed); | |
3967 | if (shut_p) { | |
3968 | while (ctx) { | |
3969 | dplane_ctx_fini(&ctx); | |
3970 | ||
3971 | ctx = dplane_ctx_dequeue(&ctxlist); | |
3972 | } | |
3973 | ||
3974 | continue; | |
3975 | } | |
3976 | ||
4c206c8f | 3977 | while (ctx) { |
d37f4d6c MS |
3978 | switch (dplane_ctx_get_op(ctx)) { |
3979 | case DPLANE_OP_ROUTE_INSTALL: | |
3980 | case DPLANE_OP_ROUTE_UPDATE: | |
3981 | case DPLANE_OP_ROUTE_DELETE: | |
188a00e0 MS |
3982 | { |
3983 | /* Bit of special case for route updates | |
3984 | * that were generated by async notifications: | |
3985 | * we don't want to continue processing these | |
3986 | * in the rib. | |
3987 | */ | |
3988 | if (dplane_ctx_get_notif_provider(ctx) == 0) | |
3989 | rib_process_result(ctx); | |
3990 | else | |
3991 | dplane_ctx_fini(&ctx); | |
3992 | } | |
3993 | break; | |
d37f4d6c | 3994 | |
54818e3b MS |
3995 | case DPLANE_OP_ROUTE_NOTIFY: |
3996 | rib_process_dplane_notify(ctx); | |
d37f4d6c MS |
3997 | break; |
3998 | ||
9865e1c3 SW |
3999 | case DPLANE_OP_NH_INSTALL: |
4000 | case DPLANE_OP_NH_UPDATE: | |
4001 | case DPLANE_OP_NH_DELETE: | |
4002 | zebra_nhg_dplane_result(ctx); | |
4003 | break; | |
4004 | ||
d37f4d6c MS |
4005 | case DPLANE_OP_LSP_INSTALL: |
4006 | case DPLANE_OP_LSP_UPDATE: | |
4007 | case DPLANE_OP_LSP_DELETE: | |
188a00e0 MS |
4008 | { |
4009 | /* Bit of special case for LSP updates | |
4010 | * that were generated by async notifications: | |
4011 | * we don't want to continue processing these. | |
4012 | */ | |
4013 | if (dplane_ctx_get_notif_provider(ctx) == 0) | |
4014 | zebra_mpls_lsp_dplane_result(ctx); | |
4015 | else | |
4016 | dplane_ctx_fini(&ctx); | |
4017 | } | |
4018 | break; | |
d37f4d6c | 4019 | |
104e3ad9 MS |
4020 | case DPLANE_OP_LSP_NOTIFY: |
4021 | zebra_mpls_process_dplane_notify(ctx); | |
d37f4d6c MS |
4022 | break; |
4023 | ||
9bd9717b MS |
4024 | case DPLANE_OP_PW_INSTALL: |
4025 | case DPLANE_OP_PW_UNINSTALL: | |
4026 | handle_pw_result(ctx); | |
4027 | break; | |
4028 | ||
cf363e1b MS |
4029 | case DPLANE_OP_SYS_ROUTE_ADD: |
4030 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
4031 | /* No further processing in zebra for these. */ | |
4032 | dplane_ctx_fini(&ctx); | |
4033 | break; | |
4034 | ||
036d93c0 MS |
4035 | case DPLANE_OP_MAC_INSTALL: |
4036 | case DPLANE_OP_MAC_DELETE: | |
4037 | zebra_vxlan_handle_result(ctx); | |
4038 | break; | |
4039 | ||
f62e5480 JU |
4040 | case DPLANE_OP_RULE_ADD: |
4041 | case DPLANE_OP_RULE_DELETE: | |
4042 | case DPLANE_OP_RULE_UPDATE: | |
5162e000 PG |
4043 | case DPLANE_OP_IPTABLE_ADD: |
4044 | case DPLANE_OP_IPTABLE_DELETE: | |
ef524230 PG |
4045 | case DPLANE_OP_IPSET_ADD: |
4046 | case DPLANE_OP_IPSET_DELETE: | |
4047 | case DPLANE_OP_IPSET_ENTRY_ADD: | |
4048 | case DPLANE_OP_IPSET_ENTRY_DELETE: | |
f62e5480 JU |
4049 | zebra_pbr_dplane_result(ctx); |
4050 | break; | |
4051 | ||
931fa60c MS |
4052 | /* Some op codes not handled here */ |
4053 | case DPLANE_OP_ADDR_INSTALL: | |
4054 | case DPLANE_OP_ADDR_UNINSTALL: | |
4055 | case DPLANE_OP_NEIGH_INSTALL: | |
4056 | case DPLANE_OP_NEIGH_UPDATE: | |
4057 | case DPLANE_OP_NEIGH_DELETE: | |
0a27a2fe PG |
4058 | case DPLANE_OP_NEIGH_IP_INSTALL: |
4059 | case DPLANE_OP_NEIGH_IP_DELETE: | |
0bbd4ff4 MS |
4060 | case DPLANE_OP_VTEP_ADD: |
4061 | case DPLANE_OP_VTEP_DELETE: | |
d68e74b4 | 4062 | case DPLANE_OP_NEIGH_DISCOVER: |
c60522f7 | 4063 | case DPLANE_OP_BR_PORT_UPDATE: |
e18747a9 | 4064 | case DPLANE_OP_NEIGH_TABLE_UPDATE: |
931fa60c | 4065 | case DPLANE_OP_NONE: |
d37f4d6c MS |
4066 | /* Don't expect this: just return the struct? */ |
4067 | dplane_ctx_fini(&ctx); | |
4068 | break; | |
931fa60c | 4069 | |
d37f4d6c | 4070 | } /* Dispatch by op code */ |
4c206c8f MS |
4071 | |
4072 | ctx = dplane_ctx_dequeue(&ctxlist); | |
4073 | } | |
4074 | ||
5709131c | 4075 | } while (1); |
7cdb1a84 | 4076 | |
5709131c | 4077 | return 0; |
7cdb1a84 MS |
4078 | } |
4079 | ||
4080 | /* | |
4081 | * Results are returned from the dataplane subsystem, in the context of | |
1bcea841 | 4082 | * the dataplane pthread. We enqueue the results here for processing by |
7cdb1a84 MS |
4083 | * the main thread later. |
4084 | */ | |
4c206c8f | 4085 | static int rib_dplane_results(struct dplane_ctx_q *ctxlist) |
7cdb1a84 MS |
4086 | { |
4087 | /* Take lock controlling queue of results */ | |
00dffa8c | 4088 | frr_with_mutex(&dplane_mutex) { |
4c206c8f MS |
4089 | /* Enqueue context blocks */ |
4090 | dplane_ctx_list_append(&rib_dplane_q, ctxlist); | |
7cdb1a84 | 4091 | } |
7cdb1a84 | 4092 | |
4c206c8f | 4093 | /* Ensure event is signalled to zebra main pthread */ |
3801e764 | 4094 | thread_add_event(zrouter.master, rib_process_dplane_results, NULL, 0, |
7cdb1a84 MS |
4095 | &t_dplane); |
4096 | ||
5709131c | 4097 | return 0; |
7cdb1a84 MS |
4098 | } |
4099 | ||
eaa2716d SW |
4100 | /* |
4101 | * Ensure there are no empty slots in the route_info array. | |
4102 | * Every route type in zebra should be present there. | |
4103 | */ | |
4104 | static void check_route_info(void) | |
4105 | { | |
4106 | int len = array_size(route_info); | |
4107 | ||
4108 | /* | |
4109 | * ZEBRA_ROUTE_SYSTEM is special cased since | |
4110 | * its key is 0 anyway. | |
4111 | * | |
4112 | * ZEBRA_ROUTE_ALL is also ignored. | |
4113 | */ | |
4114 | for (int i = 0; i < len; i++) { | |
4115 | if (i == ZEBRA_ROUTE_SYSTEM || i == ZEBRA_ROUTE_ALL) | |
4116 | continue; | |
4117 | assert(route_info[i].key); | |
8dc7a759 | 4118 | assert(route_info[i].meta_q_map < MQ_SIZE); |
eaa2716d SW |
4119 | } |
4120 | } | |
4121 | ||
718e3744 | 4122 | /* Routing information base initialize. */ |
d62a17ae | 4123 | void rib_init(void) |
718e3744 | 4124 | { |
eaa2716d SW |
4125 | check_route_info(); |
4126 | ||
2561d12e | 4127 | rib_queue_init(); |
7cdb1a84 MS |
4128 | |
4129 | /* Init dataplane, and register for results */ | |
4130 | pthread_mutex_init(&dplane_mutex, NULL); | |
4131 | TAILQ_INIT(&rib_dplane_q); | |
4c206c8f | 4132 | zebra_dplane_init(rib_dplane_results); |
718e3744 | 4133 | } |
0915bb0c AS |
4134 | |
4135 | /* | |
4136 | * vrf_id_get_next | |
4137 | * | |
4138 | * Get the first vrf id that is greater than the given vrf id if any. | |
4139 | * | |
2951a7a4 | 4140 | * Returns true if a vrf id was found, false otherwise. |
0915bb0c | 4141 | */ |
d62a17ae | 4142 | static inline int vrf_id_get_next(vrf_id_t vrf_id, vrf_id_t *next_id_p) |
0915bb0c | 4143 | { |
d62a17ae | 4144 | struct vrf *vrf; |
b72ede27 | 4145 | |
d62a17ae | 4146 | vrf = vrf_lookup_by_id(vrf_id); |
4147 | if (vrf) { | |
4148 | vrf = RB_NEXT(vrf_id_head, vrf); | |
4149 | if (vrf) { | |
4150 | *next_id_p = vrf->vrf_id; | |
4151 | return 1; | |
4152 | } | |
4153 | } | |
0915bb0c | 4154 | |
d62a17ae | 4155 | return 0; |
0915bb0c AS |
4156 | } |
4157 | ||
4158 | /* | |
4159 | * rib_tables_iter_next | |
4160 | * | |
4161 | * Returns the next table in the iteration. | |
4162 | */ | |
d62a17ae | 4163 | struct route_table *rib_tables_iter_next(rib_tables_iter_t *iter) |
4164 | { | |
4165 | struct route_table *table; | |
4166 | ||
4167 | /* | |
4168 | * Array that helps us go over all AFI/SAFI combinations via one | |
4169 | * index. | |
4170 | */ | |
2b64873d | 4171 | static const struct { |
d62a17ae | 4172 | afi_t afi; |
4173 | safi_t safi; | |
4174 | } afi_safis[] = { | |
4175 | {AFI_IP, SAFI_UNICAST}, {AFI_IP, SAFI_MULTICAST}, | |
4176 | {AFI_IP, SAFI_LABELED_UNICAST}, {AFI_IP6, SAFI_UNICAST}, | |
4177 | {AFI_IP6, SAFI_MULTICAST}, {AFI_IP6, SAFI_LABELED_UNICAST}, | |
4178 | }; | |
4179 | ||
4180 | table = NULL; | |
4181 | ||
4182 | switch (iter->state) { | |
4183 | ||
4184 | case RIB_TABLES_ITER_S_INIT: | |
4185 | iter->vrf_id = VRF_DEFAULT; | |
4186 | iter->afi_safi_ix = -1; | |
4187 | ||
4188 | /* Fall through */ | |
4189 | ||
4190 | case RIB_TABLES_ITER_S_ITERATING: | |
4191 | iter->afi_safi_ix++; | |
4192 | while (1) { | |
4193 | ||
4194 | while (iter->afi_safi_ix | |
7e3a1ec7 | 4195 | < (int)array_size(afi_safis)) { |
d62a17ae | 4196 | table = zebra_vrf_table( |
4197 | afi_safis[iter->afi_safi_ix].afi, | |
4198 | afi_safis[iter->afi_safi_ix].safi, | |
4199 | iter->vrf_id); | |
4200 | if (table) | |
4201 | break; | |
4202 | ||
4203 | iter->afi_safi_ix++; | |
4204 | } | |
4205 | ||
4206 | /* | |
4207 | * Found another table in this vrf. | |
4208 | */ | |
4209 | if (table) | |
4210 | break; | |
4211 | ||
4212 | /* | |
4213 | * Done with all tables in the current vrf, go to the | |
4214 | * next | |
4215 | * one. | |
4216 | */ | |
4217 | if (!vrf_id_get_next(iter->vrf_id, &iter->vrf_id)) | |
4218 | break; | |
4219 | ||
4220 | iter->afi_safi_ix = 0; | |
4221 | } | |
0915bb0c | 4222 | |
0915bb0c AS |
4223 | break; |
4224 | ||
d62a17ae | 4225 | case RIB_TABLES_ITER_S_DONE: |
4226 | return NULL; | |
0915bb0c AS |
4227 | } |
4228 | ||
d62a17ae | 4229 | if (table) |
4230 | iter->state = RIB_TABLES_ITER_S_ITERATING; | |
4231 | else | |
4232 | iter->state = RIB_TABLES_ITER_S_DONE; | |
0915bb0c | 4233 | |
d62a17ae | 4234 | return table; |
0915bb0c | 4235 | } |