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dm: dm-zoned: use __bio_add_page for adding single metadata page
[linux-block.git] / net / bridge / br_mdb.c
CommitLineData
b2441318 1// SPDX-License-Identifier: GPL-2.0
ee07c6e7
CW		 2#include <linux/err.h>
3#include <linux/igmp.h>
4#include <linux/kernel.h>
5#include <linux/netdevice.h>
6#include <linux/rculist.h>
7#include <linux/skbuff.h>
cfd56754 8#include <linux/if_ether.h>
ee07c6e7
CW		 9#include <net/ip.h>
10#include <net/netlink.h>
f1fecb1d 11#include <net/switchdev.h>
ee07c6e7
CW		 12#if IS_ENABLED(CONFIG_IPV6)
13#include <net/ipv6.h>
3c3769e6 14#include <net/addrconf.h>
ee07c6e7
CW		 15#endif
16
17#include "br_private.h"
18
ff391c5d 19static bool
e04d377f
NA		 20br_ip4_rports_get_timer(struct net_bridge_mcast_port *pmctx,
21 unsigned long *timer)
ff391c5d 22{
e04d377f
NA		 23 *timer = br_timer_value(&pmctx->ip4_mc_router_timer);
24 return !hlist_unhashed(&pmctx->ip4_rlist);
ff391c5d
LL		 25}
26
27static bool
e04d377f
NA		 28br_ip6_rports_get_timer(struct net_bridge_mcast_port *pmctx,
29 unsigned long *timer)
ff391c5d 30{
a3c02e76 31#if IS_ENABLED(CONFIG_IPV6)
e04d377f
NA		 32 *timer = br_timer_value(&pmctx->ip6_mc_router_timer);
33 return !hlist_unhashed(&pmctx->ip6_rlist);
a3c02e76 34#else
ff391c5d
LL		 35 *timer = 0;
36 return false;
a3c02e76 37#endif
ff391c5d
LL		 38}
39
05d6f38e
NA		 40static size_t __br_rports_one_size(void)
41{
42 return nla_total_size(sizeof(u32)) + /* MDBA_ROUTER_PORT */
43 nla_total_size(sizeof(u32)) + /* MDBA_ROUTER_PATTR_TIMER */
44 nla_total_size(sizeof(u8)) + /* MDBA_ROUTER_PATTR_TYPE */
45 nla_total_size(sizeof(u32)) + /* MDBA_ROUTER_PATTR_INET_TIMER */
46 nla_total_size(sizeof(u32)) + /* MDBA_ROUTER_PATTR_INET6_TIMER */
47 nla_total_size(sizeof(u32)); /* MDBA_ROUTER_PATTR_VID */
48}
49
50size_t br_rports_size(const struct net_bridge_mcast *brmctx)
51{
52 struct net_bridge_mcast_port *pmctx;
53 size_t size = nla_total_size(0); /* MDBA_ROUTER */
54
55 rcu_read_lock();
56 hlist_for_each_entry_rcu(pmctx, &brmctx->ip4_mc_router_list,
57 ip4_rlist)
58 size += __br_rports_one_size();
59
60#if IS_ENABLED(CONFIG_IPV6)
61 hlist_for_each_entry_rcu(pmctx, &brmctx->ip6_mc_router_list,
62 ip6_rlist)
63 size += __br_rports_one_size();
64#endif
65 rcu_read_unlock();
66
67 return size;
68}
69
dc002875
NA		 70int br_rports_fill_info(struct sk_buff *skb,
71 const struct net_bridge_mcast *brmctx)
ee07c6e7 72{
e04d377f 73 u16 vid = brmctx->vlan ? brmctx->vlan->vid : 0;
ff391c5d
LL		 74 bool have_ip4_mc_rtr, have_ip6_mc_rtr;
75 unsigned long ip4_timer, ip6_timer;
59f78f9f 76 struct nlattr *nest, *port_nest;
ff391c5d
LL		 77 struct net_bridge_port *p;
78
e04d377f 79 if (!brmctx->multicast_router || !br_rports_have_mc_router(brmctx))
ee07c6e7
CW		 80 return 0;
81
ae0be8de 82 nest = nla_nest_start_noflag(skb, MDBA_ROUTER);
ee07c6e7
CW		 83 if (nest == NULL)
84 return -EMSGSIZE;
85
e04d377f
NA		 86 list_for_each_entry_rcu(p, &brmctx->br->port_list, list) {
87 struct net_bridge_mcast_port *pmctx;
88
89 if (vid) {
90 struct net_bridge_vlan *v;
91
92 v = br_vlan_find(nbp_vlan_group(p), vid);
93 if (!v)
94 continue;
95 pmctx = &v->port_mcast_ctx;
96 } else {
97 pmctx = &p->multicast_ctx;
98 }
99
100 have_ip4_mc_rtr = br_ip4_rports_get_timer(pmctx, &ip4_timer);
101 have_ip6_mc_rtr = br_ip6_rports_get_timer(pmctx, &ip6_timer);
ff391c5d
LL		 102
103 if (!have_ip4_mc_rtr && !have_ip6_mc_rtr)
59f78f9f 104 continue;
ff391c5d 105
ae0be8de 106 port_nest = nla_nest_start_noflag(skb, MDBA_ROUTER_PORT);
59f78f9f 107 if (!port_nest)
ee07c6e7 108 goto fail;
ff391c5d 109
59f78f9f
NA		 110 if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) ||
111 nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER,
ff391c5d 112 max(ip4_timer, ip6_timer)) ||
59f78f9f 113 nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE,
9632233e 114 p->multicast_ctx.multicast_router) ||
b7fb0916
LL		 115 (have_ip4_mc_rtr &&
116 nla_put_u32(skb, MDBA_ROUTER_PATTR_INET_TIMER,
117 ip4_timer)) ||
118 (have_ip6_mc_rtr &&
119 nla_put_u32(skb, MDBA_ROUTER_PATTR_INET6_TIMER,
dc002875
NA		 120 ip6_timer)) ||
121 (vid && nla_put_u16(skb, MDBA_ROUTER_PATTR_VID, vid))) {
59f78f9f
NA		 122 nla_nest_cancel(skb, port_nest);
123 goto fail;
124 }
125 nla_nest_end(skb, port_nest);
ee07c6e7
CW		 126 }
127
128 nla_nest_end(skb, nest);
129 return 0;
130fail:
131 nla_nest_cancel(skb, nest);
132 return -EMSGSIZE;
133}
134
9d06b6d8
ER		 135static void __mdb_entry_fill_flags(struct br_mdb_entry *e, unsigned char flags)
136{
137 e->state = flags & MDB_PG_FLAGS_PERMANENT;
138 e->flags = 0;
139 if (flags & MDB_PG_FLAGS_OFFLOAD)
140 e->flags |= MDB_FLAGS_OFFLOAD;
3247b272
NA		 141 if (flags & MDB_PG_FLAGS_FAST_LEAVE)
142 e->flags |= MDB_FLAGS_FAST_LEAVE;
8266a049
NA		 143 if (flags & MDB_PG_FLAGS_STAR_EXCL)
144 e->flags |= MDB_FLAGS_STAR_EXCL;
9116ffbf
NA		 145 if (flags & MDB_PG_FLAGS_BLOCKED)
146 e->flags |= MDB_FLAGS_BLOCKED;
9d06b6d8
ER		 147}
148
88d4bd18
NA		 149static void __mdb_entry_to_br_ip(struct br_mdb_entry *entry, struct br_ip *ip,
150 struct nlattr **mdb_attrs)
6dd684c0
ER		 151{
152 memset(ip, 0, sizeof(struct br_ip));
153 ip->vid = entry->vid;
154 ip->proto = entry->addr.proto;
88d4bd18
NA		 155 switch (ip->proto) {
156 case htons(ETH_P_IP):
eab3227b 157 ip->dst.ip4 = entry->addr.u.ip4;
88d4bd18
NA		 158 if (mdb_attrs && mdb_attrs[MDBE_ATTR_SOURCE])
159 ip->src.ip4 = nla_get_in_addr(mdb_attrs[MDBE_ATTR_SOURCE]);
160 break;
6dd684c0 161#if IS_ENABLED(CONFIG_IPV6)
88d4bd18 162 case htons(ETH_P_IPV6):
eab3227b 163 ip->dst.ip6 = entry->addr.u.ip6;
88d4bd18
NA		 164 if (mdb_attrs && mdb_attrs[MDBE_ATTR_SOURCE])
165 ip->src.ip6 = nla_get_in6_addr(mdb_attrs[MDBE_ATTR_SOURCE]);
166 break;
6dd684c0 167#endif
955062b0
NA		 168 default:
169 ether_addr_copy(ip->dst.mac_addr, entry->addr.u.mac_addr);
88d4bd18
NA		 170 }
171
6dd684c0
ER		 172}
173
5205e919
NA		 174static int __mdb_fill_srcs(struct sk_buff *skb,
175 struct net_bridge_port_group *p)
176{
177 struct net_bridge_group_src *ent;
178 struct nlattr *nest, *nest_ent;
179
180 if (hlist_empty(&p->src_list))
181 return 0;
182
183 nest = nla_nest_start(skb, MDBA_MDB_EATTR_SRC_LIST);
184 if (!nest)
185 return -EMSGSIZE;
186
187 hlist_for_each_entry_rcu(ent, &p->src_list, node,
085b53c8 188 lockdep_is_held(&p->key.port->br->multicast_lock)) {
5205e919
NA		 189 nest_ent = nla_nest_start(skb, MDBA_MDB_SRCLIST_ENTRY);
190 if (!nest_ent)
191 goto out_cancel_err;
192 switch (ent->addr.proto) {
193 case htons(ETH_P_IP):
194 if (nla_put_in_addr(skb, MDBA_MDB_SRCATTR_ADDRESS,
deb96566 195 ent->addr.src.ip4)) {
5205e919
NA		 196 nla_nest_cancel(skb, nest_ent);
197 goto out_cancel_err;
198 }
199 break;
200#if IS_ENABLED(CONFIG_IPV6)
201 case htons(ETH_P_IPV6):
202 if (nla_put_in6_addr(skb, MDBA_MDB_SRCATTR_ADDRESS,
deb96566 203 &ent->addr.src.ip6)) {
5205e919
NA		 204 nla_nest_cancel(skb, nest_ent);
205 goto out_cancel_err;
206 }
207 break;
208#endif
209 default:
210 nla_nest_cancel(skb, nest_ent);
211 continue;
212 }
213 if (nla_put_u32(skb, MDBA_MDB_SRCATTR_TIMER,
214 br_timer_value(&ent->timer))) {
215 nla_nest_cancel(skb, nest_ent);
216 goto out_cancel_err;
217 }
218 nla_nest_end(skb, nest_ent);
219 }
220
221 nla_nest_end(skb, nest);
222
223 return 0;
224
225out_cancel_err:
226 nla_nest_cancel(skb, nest);
227 return -EMSGSIZE;
228}
229
6545916e 230static int __mdb_fill_info(struct sk_buff *skb,
e77b0c84 231 struct net_bridge_mdb_entry *mp,
6545916e
NA		 232 struct net_bridge_port_group *p)
233{
5205e919 234 bool dump_srcs_mode = false;
e77b0c84 235 struct timer_list *mtimer;
6545916e
NA		 236 struct nlattr *nest_ent;
237 struct br_mdb_entry e;
e77b0c84
NA		 238 u8 flags = 0;
239 int ifindex;
6545916e
NA		 240
241 memset(&e, 0, sizeof(e));
e77b0c84 242 if (p) {
085b53c8 243 ifindex = p->key.port->dev->ifindex;
e77b0c84
NA		 244 mtimer = &p->timer;
245 flags = p->flags;
246 } else {
247 ifindex = mp->br->dev->ifindex;
248 mtimer = &mp->timer;
249 }
250
251 __mdb_entry_fill_flags(&e, flags);
252 e.ifindex = ifindex;
253 e.vid = mp->addr.vid;
e65693b0 254 if (mp->addr.proto == htons(ETH_P_IP)) {
eab3227b 255 e.addr.u.ip4 = mp->addr.dst.ip4;
6545916e 256#if IS_ENABLED(CONFIG_IPV6)
e65693b0 257 } else if (mp->addr.proto == htons(ETH_P_IPV6)) {
eab3227b 258 e.addr.u.ip6 = mp->addr.dst.ip6;
6545916e 259#endif
e65693b0 260 } else {
955062b0 261 ether_addr_copy(e.addr.u.mac_addr, mp->addr.dst.mac_addr);
ccd7f25b 262 e.state = MDB_PERMANENT;
e65693b0 263 }
e77b0c84 264 e.addr.proto = mp->addr.proto;
6545916e
NA		 265 nest_ent = nla_nest_start_noflag(skb,
266 MDBA_MDB_ENTRY_INFO);
267 if (!nest_ent)
268 return -EMSGSIZE;
269
270 if (nla_put_nohdr(skb, sizeof(e), &e) ||
271 nla_put_u32(skb,
272 MDBA_MDB_EATTR_TIMER,
88d4bd18
NA		 273 br_timer_value(mtimer)))
274 goto nest_err;
8f8cb77e 275
5205e919
NA		 276 switch (mp->addr.proto) {
277 case htons(ETH_P_IP):
d3d065c0 278 dump_srcs_mode = !!(mp->br->multicast_ctx.multicast_igmp_version == 3);
88d4bd18
NA		 279 if (mp->addr.src.ip4) {
280 if (nla_put_in_addr(skb, MDBA_MDB_EATTR_SOURCE,
281 mp->addr.src.ip4))
282 goto nest_err;
283 break;
284 }
5205e919
NA		 285 break;
286#if IS_ENABLED(CONFIG_IPV6)
287 case htons(ETH_P_IPV6):
d3d065c0 288 dump_srcs_mode = !!(mp->br->multicast_ctx.multicast_mld_version == 2);
88d4bd18
NA		 289 if (!ipv6_addr_any(&mp->addr.src.ip6)) {
290 if (nla_put_in6_addr(skb, MDBA_MDB_EATTR_SOURCE,
291 &mp->addr.src.ip6))
292 goto nest_err;
293 break;
294 }
5205e919
NA		 295 break;
296#endif
955062b0
NA		 297 default:
298 ether_addr_copy(e.addr.u.mac_addr, mp->addr.dst.mac_addr);
5205e919 299 }
8f8cb77e
NA		 300 if (p) {
301 if (nla_put_u8(skb, MDBA_MDB_EATTR_RTPROT, p->rt_protocol))
302 goto nest_err;
303 if (dump_srcs_mode &&
304 (__mdb_fill_srcs(skb, p) ||
305 nla_put_u8(skb, MDBA_MDB_EATTR_GROUP_MODE,
306 p->filter_mode)))
307 goto nest_err;
308 }
6545916e
NA		 309 nla_nest_end(skb, nest_ent);
310
311 return 0;
88d4bd18
NA		 312
313nest_err:
314 nla_nest_cancel(skb, nest_ent);
315 return -EMSGSIZE;
6545916e
NA		 316}
317
ee07c6e7
CW		 318static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
319 struct net_device *dev)
320{
5205e919 321 int idx = 0, s_idx = cb->args[1], err = 0, pidx = 0, s_pidx = cb->args[2];
ee07c6e7 322 struct net_bridge *br = netdev_priv(dev);
19e3a9c9 323 struct net_bridge_mdb_entry *mp;
ee07c6e7 324 struct nlattr *nest, *nest2;
ee07c6e7 325
13cefad2 326 if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
ee07c6e7
CW		 327 return 0;
328
ae0be8de 329 nest = nla_nest_start_noflag(skb, MDBA_MDB);
ee07c6e7
CW		 330 if (nest == NULL)
331 return -EMSGSIZE;
332
19e3a9c9 333 hlist_for_each_entry_rcu(mp, &br->mdb_list, mdb_node) {
762a3d89 334 struct net_bridge_port_group *p;
335 struct net_bridge_port_group __rcu **pp;
ee07c6e7 336
19e3a9c9
NA		 337 if (idx < s_idx)
338 goto skip;
ee07c6e7 339
ae0be8de 340 nest2 = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY);
19e3a9c9
NA		 341 if (!nest2) {
342 err = -EMSGSIZE;
343 break;
344 }
ee07c6e7 345
5205e919 346 if (!s_pidx && mp->host_joined) {
e77b0c84
NA		 347 err = __mdb_fill_info(skb, mp, NULL);
348 if (err) {
349 nla_nest_cancel(skb, nest2);
350 break;
351 }
352 }
353
19e3a9c9
NA		 354 for (pp = &mp->ports; (p = rcu_dereference(*pp)) != NULL;
355 pp = &p->next) {
085b53c8 356 if (!p->key.port)
19e3a9c9 357 continue;
5205e919
NA		 358 if (pidx < s_pidx)
359 goto skip_pg;
19e3a9c9 360
e77b0c84 361 err = __mdb_fill_info(skb, mp, p);
6545916e 362 if (err) {
12913f74 363 nla_nest_end(skb, nest2);
19e3a9c9
NA		 364 goto out;
365 }
5205e919
NA		 366skip_pg:
367 pidx++;
ee07c6e7 368 }
5205e919
NA		 369 pidx = 0;
370 s_pidx = 0;
19e3a9c9
NA		 371 nla_nest_end(skb, nest2);
372skip:
373 idx++;
ee07c6e7
CW		 374 }
375
376out:
377 cb->args[1] = idx;
5205e919 378 cb->args[2] = pidx;
ee07c6e7
CW		 379 nla_nest_end(skb, nest);
380 return err;
381}
382
cc7f5022
IS		 383int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
384 struct netlink_callback *cb)
c009de10
IS		 385{
386 struct net_bridge *br = netdev_priv(dev);
387 struct br_port_msg *bpm;
388 struct nlmsghdr *nlh;
389 int err;
390
391 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
392 cb->nlh->nlmsg_seq, RTM_GETMDB, sizeof(*bpm),
393 NLM_F_MULTI);
394 if (!nlh)
395 return -EMSGSIZE;
396
397 bpm = nlmsg_data(nlh);
398 memset(bpm, 0, sizeof(*bpm));
399 bpm->ifindex = dev->ifindex;
400
401 rcu_read_lock();
402
403 err = br_mdb_fill_info(skb, cb, dev);
404 if (err)
405 goto out;
406 err = br_rports_fill_info(skb, &br->multicast_ctx);
407 if (err)
408 goto out;
409
410out:
411 rcu_read_unlock();
412 nlmsg_end(skb, nlh);
413 return err;
414}
415
37a393bc
CW		 416static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
417 struct net_device *dev,
81f19838
NA		 418 struct net_bridge_mdb_entry *mp,
419 struct net_bridge_port_group *pg,
420 int type)
37a393bc
CW		 421{
422 struct nlmsghdr *nlh;
423 struct br_port_msg *bpm;
424 struct nlattr *nest, *nest2;
425
81f19838 426 nlh = nlmsg_put(skb, 0, 0, type, sizeof(*bpm), 0);
37a393bc
CW		 427 if (!nlh)
428 return -EMSGSIZE;
429
430 bpm = nlmsg_data(nlh);
c085c499 431 memset(bpm, 0, sizeof(*bpm));
37a393bc
CW		 432 bpm->family = AF_BRIDGE;
433 bpm->ifindex = dev->ifindex;
ae0be8de 434 nest = nla_nest_start_noflag(skb, MDBA_MDB);
37a393bc
CW		 435 if (nest == NULL)
436 goto cancel;
ae0be8de 437 nest2 = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY);
37a393bc
CW		 438 if (nest2 == NULL)
439 goto end;
440
81f19838 441 if (__mdb_fill_info(skb, mp, pg))
37a393bc
CW		 442 goto end;
443
444 nla_nest_end(skb, nest2);
445 nla_nest_end(skb, nest);
053c095a
JB		 446 nlmsg_end(skb, nlh);
447 return 0;
37a393bc
CW		 448
449end:
450 nla_nest_end(skb, nest);
451cancel:
452 nlmsg_cancel(skb, nlh);
453 return -EMSGSIZE;
454}
455
81f19838 456static size_t rtnl_mdb_nlmsg_size(struct net_bridge_port_group *pg)
37a393bc 457{
81f19838
NA		 458 size_t nlmsg_size = NLMSG_ALIGN(sizeof(struct br_port_msg)) +
459 nla_total_size(sizeof(struct br_mdb_entry)) +
460 nla_total_size(sizeof(u32));
461 struct net_bridge_group_src *ent;
462 size_t addr_size = 0;
463
464 if (!pg)
465 goto out;
466
8f8cb77e
NA		 467 /* MDBA_MDB_EATTR_RTPROT */
468 nlmsg_size += nla_total_size(sizeof(u8));
469
085b53c8 470 switch (pg->key.addr.proto) {
81f19838 471 case htons(ETH_P_IP):
88d4bd18 472 /* MDBA_MDB_EATTR_SOURCE */
085b53c8 473 if (pg->key.addr.src.ip4)
88d4bd18 474 nlmsg_size += nla_total_size(sizeof(__be32));
d3d065c0 475 if (pg->key.port->br->multicast_ctx.multicast_igmp_version == 2)
81f19838
NA		 476 goto out;
477 addr_size = sizeof(__be32);
478 break;
479#if IS_ENABLED(CONFIG_IPV6)
480 case htons(ETH_P_IPV6):
88d4bd18 481 /* MDBA_MDB_EATTR_SOURCE */
085b53c8 482 if (!ipv6_addr_any(&pg->key.addr.src.ip6))
88d4bd18 483 nlmsg_size += nla_total_size(sizeof(struct in6_addr));
d3d065c0 484 if (pg->key.port->br->multicast_ctx.multicast_mld_version == 1)
81f19838
NA		 485 goto out;
486 addr_size = sizeof(struct in6_addr);
487 break;
488#endif
489 }
490
491 /* MDBA_MDB_EATTR_GROUP_MODE */
492 nlmsg_size += nla_total_size(sizeof(u8));
493
494 /* MDBA_MDB_EATTR_SRC_LIST nested attr */
495 if (!hlist_empty(&pg->src_list))
496 nlmsg_size += nla_total_size(0);
497
498 hlist_for_each_entry(ent, &pg->src_list, node) {
499 /* MDBA_MDB_SRCLIST_ENTRY nested attr +
500 * MDBA_MDB_SRCATTR_ADDRESS + MDBA_MDB_SRCATTR_TIMER
501 */
502 nlmsg_size += nla_total_size(0) +
503 nla_total_size(addr_size) +
504 nla_total_size(sizeof(u32));
505 }
506out:
507 return nlmsg_size;
37a393bc
CW		 508}
509
9ae9ff99
VO		 510void br_mdb_notify(struct net_device *dev,
511 struct net_bridge_mdb_entry *mp,
512 struct net_bridge_port_group *pg,
513 int type)
514{
515 struct net *net = dev_net(dev);
516 struct sk_buff *skb;
517 int err = -ENOBUFS;
518
519 br_switchdev_mdb_notify(dev, mp, pg, type);
f1fecb1d 520
81f19838 521 skb = nlmsg_new(rtnl_mdb_nlmsg_size(pg), GFP_ATOMIC);
37a393bc
CW		 522 if (!skb)
523 goto errout;
524
81f19838 525 err = nlmsg_populate_mdb_fill(skb, dev, mp, pg, type);
37a393bc
CW		 526 if (err < 0) {
527 kfree_skb(skb);
528 goto errout;
529 }
530
531 rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
532 return;
533errout:
534 rtnl_set_sk_err(net, RTNLGRP_MDB, err);
535}
536
949f1e39
SA		 537static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
538 struct net_device *dev,
1e9ca456 539 int ifindex, u16 vid, u32 pid,
949f1e39
SA		 540 u32 seq, int type, unsigned int flags)
541{
1e9ca456 542 struct nlattr *nest, *port_nest;
949f1e39
SA		 543 struct br_port_msg *bpm;
544 struct nlmsghdr *nlh;
949f1e39 545
94a72b3f 546 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
949f1e39
SA		 547 if (!nlh)
548 return -EMSGSIZE;
549
550 bpm = nlmsg_data(nlh);
551 memset(bpm, 0, sizeof(*bpm));
552 bpm->family = AF_BRIDGE;
553 bpm->ifindex = dev->ifindex;
ae0be8de 554 nest = nla_nest_start_noflag(skb, MDBA_ROUTER);
949f1e39
SA		 555 if (!nest)
556 goto cancel;
557
1e9ca456
NA		 558 port_nest = nla_nest_start_noflag(skb, MDBA_ROUTER_PORT);
559 if (!port_nest)
560 goto end;
561 if (nla_put_nohdr(skb, sizeof(u32), &ifindex)) {
562 nla_nest_cancel(skb, port_nest);
949f1e39 563 goto end;
1e9ca456
NA		 564 }
565 if (vid && nla_put_u16(skb, MDBA_ROUTER_PATTR_VID, vid)) {
566 nla_nest_cancel(skb, port_nest);
567 goto end;
568 }
569 nla_nest_end(skb, port_nest);
949f1e39
SA		 570
571 nla_nest_end(skb, nest);
572 nlmsg_end(skb, nlh);
573 return 0;
574
575end:
576 nla_nest_end(skb, nest);
577cancel:
578 nlmsg_cancel(skb, nlh);
579 return -EMSGSIZE;
580}
581
582static inline size_t rtnl_rtr_nlmsg_size(void)
583{
584 return NLMSG_ALIGN(sizeof(struct br_port_msg))
1e9ca456
NA		 585 + nla_total_size(sizeof(__u32))
586 + nla_total_size(sizeof(u16));
949f1e39
SA		 587}
588
1e9ca456 589void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
949f1e39
SA		 590 int type)
591{
592 struct net *net = dev_net(dev);
593 struct sk_buff *skb;
594 int err = -ENOBUFS;
595 int ifindex;
1e9ca456 596 u16 vid;
949f1e39 597
1e9ca456
NA		 598 ifindex = pmctx ? pmctx->port->dev->ifindex : 0;
599 vid = pmctx && br_multicast_port_ctx_is_vlan(pmctx) ? pmctx->vlan->vid :
600 0;
949f1e39
SA		 601 skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC);
602 if (!skb)
603 goto errout;
604
1e9ca456
NA		 605 err = nlmsg_populate_rtr_fill(skb, dev, ifindex, vid, 0, 0, type,
606 NTF_SELF);
949f1e39
SA		 607 if (err < 0) {
608 kfree_skb(skb);
609 goto errout;
610 }
611
612 rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
613 return;
614
615errout:
616 rtnl_set_sk_err(net, RTNLGRP_MDB, err);
617}
618
6afaae6d
IS		 619static const struct nla_policy
620br_mdbe_src_list_entry_pol[MDBE_SRCATTR_MAX + 1] = {
621 [MDBE_SRCATTR_ADDRESS] = NLA_POLICY_RANGE(NLA_BINARY,
622 sizeof(struct in_addr),
623 sizeof(struct in6_addr)),
624};
625
626static const struct nla_policy
627br_mdbe_src_list_pol[MDBE_SRC_LIST_MAX + 1] = {
628 [MDBE_SRC_LIST_ENTRY] = NLA_POLICY_NESTED(br_mdbe_src_list_entry_pol),
629};
630
1870a2d3
IS		 631static const struct nla_policy br_mdbe_attrs_pol[MDBE_ATTR_MAX + 1] = {
632 [MDBE_ATTR_SOURCE] = NLA_POLICY_RANGE(NLA_BINARY,
633 sizeof(struct in_addr),
634 sizeof(struct in6_addr)),
6afaae6d
IS		 635 [MDBE_ATTR_GROUP_MODE] = NLA_POLICY_RANGE(NLA_U8, MCAST_EXCLUDE,
636 MCAST_INCLUDE),
637 [MDBE_ATTR_SRC_LIST] = NLA_POLICY_NESTED(br_mdbe_src_list_pol),
1d7b66a7 638 [MDBE_ATTR_RTPROT] = NLA_POLICY_MIN(NLA_U8, RTPROT_STATIC),
1870a2d3
IS		 639};
640
88d4bd18
NA		 641static bool is_valid_mdb_source(struct nlattr *attr, __be16 proto,
642 struct netlink_ext_ack *extack)
643{
644 switch (proto) {
645 case htons(ETH_P_IP):
646 if (nla_len(attr) != sizeof(struct in_addr)) {
647 NL_SET_ERR_MSG_MOD(extack, "IPv4 invalid source address length");
648 return false;
649 }
650 if (ipv4_is_multicast(nla_get_in_addr(attr))) {
651 NL_SET_ERR_MSG_MOD(extack, "IPv4 multicast source address is not allowed");
652 return false;
653 }
654 break;
655#if IS_ENABLED(CONFIG_IPV6)
656 case htons(ETH_P_IPV6): {
657 struct in6_addr src;
658
659 if (nla_len(attr) != sizeof(struct in6_addr)) {
660 NL_SET_ERR_MSG_MOD(extack, "IPv6 invalid source address length");
661 return false;
662 }
663 src = nla_get_in6_addr(attr);
664 if (ipv6_addr_is_multicast(&src)) {
665 NL_SET_ERR_MSG_MOD(extack, "IPv6 multicast source address is not allowed");
666 return false;
667 }
668 break;
669 }
670#endif
671 default:
672 NL_SET_ERR_MSG_MOD(extack, "Invalid protocol used with source address");
673 return false;
674 }
675
676 return true;
677}
678
6567cb43
NA		 679static struct net_bridge_mcast *
680__br_mdb_choose_context(struct net_bridge *br,
681 const struct br_mdb_entry *entry,
682 struct netlink_ext_ack *extack)
683{
684 struct net_bridge_mcast *brmctx = NULL;
685 struct net_bridge_vlan *v;
686
687 if (!br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
688 brmctx = &br->multicast_ctx;
689 goto out;
690 }
691
692 if (!entry->vid) {
693 NL_SET_ERR_MSG_MOD(extack, "Cannot add an entry without a vlan when vlan snooping is enabled");
694 goto out;
695 }
696
697 v = br_vlan_find(br_vlan_group(br), entry->vid);
698 if (!v) {
699 NL_SET_ERR_MSG_MOD(extack, "Vlan is not configured");
700 goto out;
701 }
702 if (br_multicast_ctx_vlan_global_disabled(&v->br_mcast_ctx)) {
703 NL_SET_ERR_MSG_MOD(extack, "Vlan's multicast processing is disabled");
704 goto out;
705 }
706 brmctx = &v->br_mcast_ctx;
707out:
708 return brmctx;
709}
710
61f21835
IS		 711static int br_mdb_replace_group_sg(const struct br_mdb_config *cfg,
712 struct net_bridge_mdb_entry *mp,
713 struct net_bridge_port_group *pg,
714 struct net_bridge_mcast *brmctx,
715 unsigned char flags)
716{
717 unsigned long now = jiffies;
718
719 pg->flags = flags;
720 pg->rt_protocol = cfg->rt_protocol;
721 if (!(flags & MDB_PG_FLAGS_PERMANENT) && !cfg->src_entry)
722 mod_timer(&pg->timer,
723 now + brmctx->multicast_membership_interval);
724 else
725 del_timer(&pg->timer);
726
727 br_mdb_notify(cfg->br->dev, mp, pg, RTM_NEWMDB);
728
729 return 0;
730}
731
6ff1e68e
IS		 732static int br_mdb_add_group_sg(const struct br_mdb_config *cfg,
733 struct net_bridge_mdb_entry *mp,
734 struct net_bridge_mcast *brmctx,
735 unsigned char flags,
736 struct netlink_ext_ack *extack)
737{
738 struct net_bridge_port_group __rcu **pp;
739 struct net_bridge_port_group *p;
740 unsigned long now = jiffies;
741
742 for (pp = &mp->ports;
743 (p = mlock_dereference(*pp, cfg->br)) != NULL;
744 pp = &p->next) {
745 if (p->key.port == cfg->p) {
61f21835
IS		 746 if (!(cfg->nlflags & NLM_F_REPLACE)) {
747 NL_SET_ERR_MSG_MOD(extack, "(S, G) group is already joined by port");
748 return -EEXIST;
749 }
750 return br_mdb_replace_group_sg(cfg, mp, p, brmctx,
751 flags);
6ff1e68e
IS		 752 }
753 if ((unsigned long)p->key.port < (unsigned long)cfg->p)
754 break;
755 }
756
757 p = br_multicast_new_port_group(cfg->p, &cfg->group, *pp, flags, NULL,
60977a0c 758 MCAST_INCLUDE, cfg->rt_protocol, extack);
1c85b80b 759 if (unlikely(!p))
6ff1e68e 760 return -ENOMEM;
1c85b80b 761
6ff1e68e 762 rcu_assign_pointer(*pp, p);
079afd66 763 if (!(flags & MDB_PG_FLAGS_PERMANENT) && !cfg->src_entry)
6ff1e68e
IS		 764 mod_timer(&p->timer,
765 now + brmctx->multicast_membership_interval);
766 br_mdb_notify(cfg->br->dev, mp, p, RTM_NEWMDB);
767
768 /* All of (*, G) EXCLUDE ports need to be added to the new (S, G) for
769 * proper replication.
770 */
771 if (br_multicast_should_handle_mode(brmctx, cfg->group.proto)) {
772 struct net_bridge_mdb_entry *star_mp;
773 struct br_ip star_group;
774
775 star_group = p->key.addr;
776 memset(&star_group.src, 0, sizeof(star_group.src));
777 star_mp = br_mdb_ip_get(cfg->br, &star_group);
778 if (star_mp)
779 br_multicast_sg_add_exclude_ports(star_mp, p);
780 }
781
782 return 0;
783}
784
b1c8fec8
IS		 785static int br_mdb_add_group_src_fwd(const struct br_mdb_config *cfg,
786 struct br_ip *src_ip,
787 struct net_bridge_mcast *brmctx,
788 struct netlink_ext_ack *extack)
789{
790 struct net_bridge_mdb_entry *sgmp;
791 struct br_mdb_config sg_cfg;
792 struct br_ip sg_ip;
793 u8 flags = 0;
794
795 sg_ip = cfg->group;
796 sg_ip.src = src_ip->src;
797 sgmp = br_multicast_new_group(cfg->br, &sg_ip);
798 if (IS_ERR(sgmp)) {
799 NL_SET_ERR_MSG_MOD(extack, "Failed to add (S, G) MDB entry");
800 return PTR_ERR(sgmp);
801 }
802
803 if (cfg->entry->state == MDB_PERMANENT)
804 flags |= MDB_PG_FLAGS_PERMANENT;
805 if (cfg->filter_mode == MCAST_EXCLUDE)
806 flags |= MDB_PG_FLAGS_BLOCKED;
807
808 memset(&sg_cfg, 0, sizeof(sg_cfg));
809 sg_cfg.br = cfg->br;
810 sg_cfg.p = cfg->p;
811 sg_cfg.entry = cfg->entry;
812 sg_cfg.group = sg_ip;
813 sg_cfg.src_entry = true;
814 sg_cfg.filter_mode = MCAST_INCLUDE;
1d7b66a7 815 sg_cfg.rt_protocol = cfg->rt_protocol;
61f21835 816 sg_cfg.nlflags = cfg->nlflags;
b1c8fec8
IS		 817 return br_mdb_add_group_sg(&sg_cfg, sgmp, brmctx, flags, extack);
818}
819
820static int br_mdb_add_group_src(const struct br_mdb_config *cfg,
821 struct net_bridge_port_group *pg,
822 struct net_bridge_mcast *brmctx,
823 struct br_mdb_src_entry *src,
824 struct netlink_ext_ack *extack)
825{
826 struct net_bridge_group_src *ent;
827 unsigned long now = jiffies;
828 int err;
829
830 ent = br_multicast_find_group_src(pg, &src->addr);
831 if (!ent) {
832 ent = br_multicast_new_group_src(pg, &src->addr);
833 if (!ent) {
834 NL_SET_ERR_MSG_MOD(extack, "Failed to add new source entry");
835 return -ENOSPC;
836 }
61f21835 837 } else if (!(cfg->nlflags & NLM_F_REPLACE)) {
b1c8fec8
IS		 838 NL_SET_ERR_MSG_MOD(extack, "Source entry already exists");
839 return -EEXIST;
840 }
841
842 if (cfg->filter_mode == MCAST_INCLUDE &&
843 cfg->entry->state == MDB_TEMPORARY)
844 mod_timer(&ent->timer, now + br_multicast_gmi(brmctx));
845 else
846 del_timer(&ent->timer);
847
848 /* Install a (S, G) forwarding entry for the source. */
849 err = br_mdb_add_group_src_fwd(cfg, &src->addr, brmctx, extack);
850 if (err)
851 goto err_del_sg;
852
853 ent->flags = BR_SGRP_F_INSTALLED | BR_SGRP_F_USER_ADDED;
854
855 return 0;
856
857err_del_sg:
858 __br_multicast_del_group_src(ent);
859 return err;
860}
861
862static void br_mdb_del_group_src(struct net_bridge_port_group *pg,
863 struct br_mdb_src_entry *src)
864{
865 struct net_bridge_group_src *ent;
866
867 ent = br_multicast_find_group_src(pg, &src->addr);
868 if (WARN_ON_ONCE(!ent))
869 return;
870 br_multicast_del_group_src(ent, false);
871}
872
873static int br_mdb_add_group_srcs(const struct br_mdb_config *cfg,
874 struct net_bridge_port_group *pg,
875 struct net_bridge_mcast *brmctx,
876 struct netlink_ext_ack *extack)
877{
878 int i, err;
879
880 for (i = 0; i < cfg->num_src_entries; i++) {
881 err = br_mdb_add_group_src(cfg, pg, brmctx,
882 &cfg->src_entries[i], extack);
883 if (err)
884 goto err_del_group_srcs;
885 }
886
887 return 0;
888
889err_del_group_srcs:
890 for (i--; i >= 0; i--)
891 br_mdb_del_group_src(pg, &cfg->src_entries[i]);
892 return err;
893}
894
61f21835
IS		 895static int br_mdb_replace_group_srcs(const struct br_mdb_config *cfg,
896 struct net_bridge_port_group *pg,
897 struct net_bridge_mcast *brmctx,
898 struct netlink_ext_ack *extack)
899{
900 struct net_bridge_group_src *ent;
901 struct hlist_node *tmp;
902 int err;
903
904 hlist_for_each_entry(ent, &pg->src_list, node)
905 ent->flags |= BR_SGRP_F_DELETE;
906
907 err = br_mdb_add_group_srcs(cfg, pg, brmctx, extack);
908 if (err)
909 goto err_clear_delete;
910
911 hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node) {
912 if (ent->flags & BR_SGRP_F_DELETE)
913 br_multicast_del_group_src(ent, false);
914 }
915
916 return 0;
917
918err_clear_delete:
919 hlist_for_each_entry(ent, &pg->src_list, node)
920 ent->flags &= ~BR_SGRP_F_DELETE;
921 return err;
922}
923
924static int br_mdb_replace_group_star_g(const struct br_mdb_config *cfg,
925 struct net_bridge_mdb_entry *mp,
926 struct net_bridge_port_group *pg,
927 struct net_bridge_mcast *brmctx,
928 unsigned char flags,
929 struct netlink_ext_ack *extack)
930{
931 unsigned long now = jiffies;
932 int err;
933
934 err = br_mdb_replace_group_srcs(cfg, pg, brmctx, extack);
935 if (err)
936 return err;
937
938 pg->flags = flags;
939 pg->filter_mode = cfg->filter_mode;
940 pg->rt_protocol = cfg->rt_protocol;
941 if (!(flags & MDB_PG_FLAGS_PERMANENT) &&
942 cfg->filter_mode == MCAST_EXCLUDE)
943 mod_timer(&pg->timer,
944 now + brmctx->multicast_membership_interval);
945 else
946 del_timer(&pg->timer);
947
948 br_mdb_notify(cfg->br->dev, mp, pg, RTM_NEWMDB);
949
950 if (br_multicast_should_handle_mode(brmctx, cfg->group.proto))
951 br_multicast_star_g_handle_mode(pg, cfg->filter_mode);
952
953 return 0;
954}
955
6ff1e68e
IS		 956static int br_mdb_add_group_star_g(const struct br_mdb_config *cfg,
957 struct net_bridge_mdb_entry *mp,
958 struct net_bridge_mcast *brmctx,
959 unsigned char flags,
960 struct netlink_ext_ack *extack)
961{
962 struct net_bridge_port_group __rcu **pp;
963 struct net_bridge_port_group *p;
964 unsigned long now = jiffies;
b1c8fec8 965 int err;
6ff1e68e
IS		 966
967 for (pp = &mp->ports;
968 (p = mlock_dereference(*pp, cfg->br)) != NULL;
969 pp = &p->next) {
970 if (p->key.port == cfg->p) {
61f21835
IS		 971 if (!(cfg->nlflags & NLM_F_REPLACE)) {
972 NL_SET_ERR_MSG_MOD(extack, "(*, G) group is already joined by port");
973 return -EEXIST;
974 }
975 return br_mdb_replace_group_star_g(cfg, mp, p, brmctx,
976 flags, extack);
6ff1e68e
IS		 977 }
978 if ((unsigned long)p->key.port < (unsigned long)cfg->p)
979 break;
980 }
981
982 p = br_multicast_new_port_group(cfg->p, &cfg->group, *pp, flags, NULL,
60977a0c
PM		 983 cfg->filter_mode, cfg->rt_protocol,
984 extack);
1c85b80b 985 if (unlikely(!p))
6ff1e68e 986 return -ENOMEM;
b1c8fec8
IS		 987
988 err = br_mdb_add_group_srcs(cfg, p, brmctx, extack);
989 if (err)
990 goto err_del_port_group;
991
6ff1e68e 992 rcu_assign_pointer(*pp, p);
b1c8fec8
IS		 993 if (!(flags & MDB_PG_FLAGS_PERMANENT) &&
994 cfg->filter_mode == MCAST_EXCLUDE)
6ff1e68e
IS		 995 mod_timer(&p->timer,
996 now + brmctx->multicast_membership_interval);
997 br_mdb_notify(cfg->br->dev, mp, p, RTM_NEWMDB);
998 /* If we are adding a new EXCLUDE port group (*, G), it needs to be
999 * also added to all (S, G) entries for proper replication.
1000 */
b1c8fec8
IS		 1001 if (br_multicast_should_handle_mode(brmctx, cfg->group.proto) &&
1002 cfg->filter_mode == MCAST_EXCLUDE)
6ff1e68e
IS		 1003 br_multicast_star_g_handle_mode(p, MCAST_EXCLUDE);
1004
1005 return 0;
b1c8fec8
IS		 1006
1007err_del_port_group:
976b3858 1008 br_multicast_del_port_group(p);
b1c8fec8 1009 return err;
6ff1e68e
IS		 1010}
1011
090149ea 1012static int br_mdb_add_group(const struct br_mdb_config *cfg,
83f7398e 1013 struct netlink_ext_ack *extack)
cfd56754 1014{
090149ea
IS		 1015 struct br_mdb_entry *entry = cfg->entry;
1016 struct net_bridge_port *port = cfg->p;
6ff1e68e 1017 struct net_bridge_mdb_entry *mp;
090149ea 1018 struct net_bridge *br = cfg->br;
6567cb43 1019 struct net_bridge_mcast *brmctx;
9f52a514 1020 struct br_ip group = cfg->group;
0e761ac0 1021 unsigned char flags = 0;
cfd56754 1022
6567cb43
NA		 1023 brmctx = __br_mdb_choose_context(br, entry, extack);
1024 if (!brmctx)
1025 return -EINVAL;
1026
d1942cd4
IS		 1027 mp = br_multicast_new_group(br, &group);
1028 if (IS_ERR(mp))
1029 return PTR_ERR(mp);
cfd56754 1030
1bc844ee
NA		 1031 /* host join */
1032 if (!port) {
83f7398e
NA		 1033 if (mp->host_joined) {
1034 NL_SET_ERR_MSG_MOD(extack, "Group is already joined by host");
1bc844ee 1035 return -EEXIST;
83f7398e 1036 }
1bc844ee 1037
58d913a3 1038 br_multicast_host_join(brmctx, mp, false);
81f19838 1039 br_mdb_notify(br->dev, mp, NULL, RTM_NEWMDB);
1bc844ee
NA		 1040
1041 return 0;
1042 }
1043
0e761ac0
VO		 1044 if (entry->state == MDB_PERMANENT)
1045 flags |= MDB_PG_FLAGS_PERMANENT;
1046
6ff1e68e
IS		 1047 if (br_multicast_is_star_g(&group))
1048 return br_mdb_add_group_star_g(cfg, mp, brmctx, flags, extack);
1049 else
1050 return br_mdb_add_group_sg(cfg, mp, brmctx, flags, extack);
cfd56754
CW		 1051}
1052
8bd9c08e 1053static int __br_mdb_add(const struct br_mdb_config *cfg,
83f7398e 1054 struct netlink_ext_ack *extack)
cfd56754 1055{
cfd56754
CW		 1056 int ret;
1057
8bd9c08e 1058 spin_lock_bh(&cfg->br->multicast_lock);
090149ea 1059 ret = br_mdb_add_group(cfg, extack);
8bd9c08e 1060 spin_unlock_bh(&cfg->br->multicast_lock);
7eea629d 1061
cfd56754
CW		 1062 return ret;
1063}
1064
6afaae6d
IS		 1065static int br_mdb_config_src_entry_init(struct nlattr *src_entry,
1066 struct br_mdb_src_entry *src,
1067 __be16 proto,
1068 struct netlink_ext_ack *extack)
1069{
1070 struct nlattr *tb[MDBE_SRCATTR_MAX + 1];
1071 int err;
1072
1073 err = nla_parse_nested(tb, MDBE_SRCATTR_MAX, src_entry,
1074 br_mdbe_src_list_entry_pol, extack);
1075 if (err)
1076 return err;
1077
1078 if (NL_REQ_ATTR_CHECK(extack, src_entry, tb, MDBE_SRCATTR_ADDRESS))
1079 return -EINVAL;
1080
1081 if (!is_valid_mdb_source(tb[MDBE_SRCATTR_ADDRESS], proto, extack))
1082 return -EINVAL;
1083
1084 src->addr.proto = proto;
1085 nla_memcpy(&src->addr.src, tb[MDBE_SRCATTR_ADDRESS],
1086 nla_len(tb[MDBE_SRCATTR_ADDRESS]));
1087
1088 return 0;
1089}
1090
1091static int br_mdb_config_src_list_init(struct nlattr *src_list,
1092 struct br_mdb_config *cfg,
1093 struct netlink_ext_ack *extack)
1094{
1095 struct nlattr *src_entry;
1096 int rem, err;
1097 int i = 0;
1098
1099 nla_for_each_nested(src_entry, src_list, rem)
1100 cfg->num_src_entries++;
1101
1102 if (cfg->num_src_entries >= PG_SRC_ENT_LIMIT) {
1103 NL_SET_ERR_MSG_FMT_MOD(extack, "Exceeded maximum number of source entries (%u)",
1104 PG_SRC_ENT_LIMIT - 1);
1105 return -EINVAL;
1106 }
1107
1108 cfg->src_entries = kcalloc(cfg->num_src_entries,
1109 sizeof(struct br_mdb_src_entry), GFP_KERNEL);
1110 if (!cfg->src_entries)
1111 return -ENOMEM;
1112
1113 nla_for_each_nested(src_entry, src_list, rem) {
1114 err = br_mdb_config_src_entry_init(src_entry,
1115 &cfg->src_entries[i],
1116 cfg->entry->addr.proto,
1117 extack);
1118 if (err)
1119 goto err_src_entry_init;
1120 i++;
1121 }
1122
1123 return 0;
1124
1125err_src_entry_init:
1126 kfree(cfg->src_entries);
1127 return err;
1128}
1129
1130static void br_mdb_config_src_list_fini(struct br_mdb_config *cfg)
1131{
1132 kfree(cfg->src_entries);
1133}
1134
cb453926
IS		 1135static int br_mdb_config_attrs_init(struct nlattr *set_attrs,
1136 struct br_mdb_config *cfg,
1137 struct netlink_ext_ack *extack)
1138{
1139 struct nlattr *mdb_attrs[MDBE_ATTR_MAX + 1];
1140 int err;
1141
1142 err = nla_parse_nested(mdb_attrs, MDBE_ATTR_MAX, set_attrs,
1143 br_mdbe_attrs_pol, extack);
1144 if (err)
1145 return err;
1146
1147 if (mdb_attrs[MDBE_ATTR_SOURCE] &&
1148 !is_valid_mdb_source(mdb_attrs[MDBE_ATTR_SOURCE],
1149 cfg->entry->addr.proto, extack))
1150 return -EINVAL;
1151
1152 __mdb_entry_to_br_ip(cfg->entry, &cfg->group, mdb_attrs);
1153
6afaae6d
IS		 1154 if (mdb_attrs[MDBE_ATTR_GROUP_MODE]) {
1155 if (!cfg->p) {
1156 NL_SET_ERR_MSG_MOD(extack, "Filter mode cannot be set for host groups");
1157 return -EINVAL;
1158 }
1159 if (!br_multicast_is_star_g(&cfg->group)) {
1160 NL_SET_ERR_MSG_MOD(extack, "Filter mode can only be set for (*, G) entries");
1161 return -EINVAL;
1162 }
1163 cfg->filter_mode = nla_get_u8(mdb_attrs[MDBE_ATTR_GROUP_MODE]);
1164 } else {
1165 cfg->filter_mode = MCAST_EXCLUDE;
1166 }
1167
1168 if (mdb_attrs[MDBE_ATTR_SRC_LIST]) {
1169 if (!cfg->p) {
1170 NL_SET_ERR_MSG_MOD(extack, "Source list cannot be set for host groups");
1171 return -EINVAL;
1172 }
1173 if (!br_multicast_is_star_g(&cfg->group)) {
1174 NL_SET_ERR_MSG_MOD(extack, "Source list can only be set for (*, G) entries");
1175 return -EINVAL;
1176 }
1177 if (!mdb_attrs[MDBE_ATTR_GROUP_MODE]) {
1178 NL_SET_ERR_MSG_MOD(extack, "Source list cannot be set without filter mode");
1179 return -EINVAL;
1180 }
1181 err = br_mdb_config_src_list_init(mdb_attrs[MDBE_ATTR_SRC_LIST],
1182 cfg, extack);
1183 if (err)
1184 return err;
1185 }
1186
1187 if (!cfg->num_src_entries && cfg->filter_mode == MCAST_INCLUDE) {
1188 NL_SET_ERR_MSG_MOD(extack, "Cannot add (*, G) INCLUDE with an empty source list");
1189 return -EINVAL;
1190 }
1191
1d7b66a7
IS		 1192 if (mdb_attrs[MDBE_ATTR_RTPROT]) {
1193 if (!cfg->p) {
1194 NL_SET_ERR_MSG_MOD(extack, "Protocol cannot be set for host groups");
1195 return -EINVAL;
1196 }
1197 cfg->rt_protocol = nla_get_u8(mdb_attrs[MDBE_ATTR_RTPROT]);
1198 }
1199
cb453926
IS		 1200 return 0;
1201}
1202
cc7f5022
IS		 1203static int br_mdb_config_init(struct br_mdb_config *cfg, struct net_device *dev,
1204 struct nlattr *tb[], u16 nlmsg_flags,
cb453926
IS		 1205 struct netlink_ext_ack *extack)
1206{
cc7f5022 1207 struct net *net = dev_net(dev);
cb453926
IS		 1208
1209 memset(cfg, 0, sizeof(*cfg));
b1c8fec8 1210 cfg->filter_mode = MCAST_EXCLUDE;
1d7b66a7 1211 cfg->rt_protocol = RTPROT_STATIC;
cc7f5022 1212 cfg->nlflags = nlmsg_flags;
cb453926
IS		 1213
1214 cfg->br = netdev_priv(dev);
1215
1216 if (!netif_running(cfg->br->dev)) {
1217 NL_SET_ERR_MSG_MOD(extack, "Bridge device is not running");
1218 return -EINVAL;
1219 }
1220
1221 if (!br_opt_get(cfg->br, BROPT_MULTICAST_ENABLED)) {
1222 NL_SET_ERR_MSG_MOD(extack, "Bridge's multicast processing is disabled");
1223 return -EINVAL;
1224 }
1225
cb453926 1226 cfg->entry = nla_data(tb[MDBA_SET_ENTRY]);
cb453926
IS		 1227
1228 if (cfg->entry->ifindex != cfg->br->dev->ifindex) {
1229 struct net_device *pdev;
1230
1231 pdev = __dev_get_by_index(net, cfg->entry->ifindex);
1232 if (!pdev) {
1233 NL_SET_ERR_MSG_MOD(extack, "Port net device doesn't exist");
1234 return -ENODEV;
1235 }
1236
1237 cfg->p = br_port_get_rtnl(pdev);
1238 if (!cfg->p) {
1239 NL_SET_ERR_MSG_MOD(extack, "Net device is not a bridge port");
1240 return -EINVAL;
1241 }
1242
1243 if (cfg->p->br != cfg->br) {
1244 NL_SET_ERR_MSG_MOD(extack, "Port belongs to a different bridge device");
1245 return -EINVAL;
1246 }
1247 }
1248
da654c80
IS		 1249 if (cfg->entry->addr.proto == htons(ETH_P_IP) &&
1250 ipv4_is_zeronet(cfg->entry->addr.u.ip4)) {
1251 NL_SET_ERR_MSG_MOD(extack, "IPv4 entry group address 0.0.0.0 is not allowed");
1252 return -EINVAL;
1253 }
1254
cb453926
IS		 1255 if (tb[MDBA_SET_ENTRY_ATTRS])
1256 return br_mdb_config_attrs_init(tb[MDBA_SET_ENTRY_ATTRS], cfg,
1257 extack);
1258 else
1259 __mdb_entry_to_br_ip(cfg->entry, &cfg->group, NULL);
1260
1261 return 0;
1262}
1263
6afaae6d
IS		 1264static void br_mdb_config_fini(struct br_mdb_config *cfg)
1265{
1266 br_mdb_config_src_list_fini(cfg);
1267}
1268
cc7f5022
IS		 1269int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
1270 struct netlink_ext_ack *extack)
cfd56754 1271{
2594e906 1272 struct net_bridge_vlan_group *vg;
2594e906 1273 struct net_bridge_vlan *v;
cb453926 1274 struct br_mdb_config cfg;
cfd56754
CW		 1275 int err;
1276
cc7f5022 1277 err = br_mdb_config_init(&cfg, dev, tb, nlmsg_flags, extack);
cb453926
IS		 1278 if (err)
1279 return err;
1280
160dd931 1281 err = -EINVAL;
4c1ebc6c
IS		 1282 /* host join errors which can happen before creating the group */
1283 if (!cfg.p && !br_group_is_l2(&cfg.group)) {
1284 /* don't allow any flags for host-joined IP groups */
1285 if (cfg.entry->state) {
1286 NL_SET_ERR_MSG_MOD(extack, "Flags are not allowed for host groups");
160dd931 1287 goto out;
4c1ebc6c
IS		 1288 }
1289 if (!br_multicast_is_star_g(&cfg.group)) {
1290 NL_SET_ERR_MSG_MOD(extack, "Groups with sources cannot be manually host joined");
160dd931 1291 goto out;
4c1ebc6c
IS		 1292 }
1293 }
1294
1295 if (br_group_is_l2(&cfg.group) && cfg.entry->state != MDB_PERMANENT) {
1296 NL_SET_ERR_MSG_MOD(extack, "Only permanent L2 entries allowed");
160dd931 1297 goto out;
4c1ebc6c
IS		 1298 }
1299
f2b5aac6
IS		 1300 if (cfg.p) {
1301 if (cfg.p->state == BR_STATE_DISABLED && cfg.entry->state != MDB_PERMANENT) {
2aa4abed 1302 NL_SET_ERR_MSG_MOD(extack, "Port is in disabled state and entry is not permanent");
160dd931 1303 goto out;
83f7398e 1304 }
38661168 1305 vg = nbp_vlan_group(cfg.p);
1bc844ee 1306 } else {
f2b5aac6 1307 vg = br_vlan_group(cfg.br);
1bc844ee 1308 }
e44deb2f 1309
f59783f5
NA		 1310 /* If vlan filtering is enabled and VLAN is not specified
1311 * install mdb entry on all vlans configured on the port.
1312 */
f2b5aac6 1313 if (br_vlan_enabled(cfg.br->dev) && vg && cfg.entry->vid == 0) {
2594e906 1314 list_for_each_entry(v, &vg->vlan_list, vlist) {
f2b5aac6 1315 cfg.entry->vid = v->vid;
9f52a514 1316 cfg.group.vid = v->vid;
3ee56623 1317 err = __br_mdb_add(&cfg, extack);
e44deb2f
SA		 1318 if (err)
1319 break;
e44deb2f
SA		 1320 }
1321 } else {
3ee56623 1322 err = __br_mdb_add(&cfg, extack);
e44deb2f
SA		 1323 }
1324
160dd931 1325out:
6afaae6d 1326 br_mdb_config_fini(&cfg);
cfd56754
CW		 1327 return err;
1328}
1329
3ee56623 1330static int __br_mdb_del(const struct br_mdb_config *cfg)
cfd56754 1331{
8bd9c08e
IS		 1332 struct br_mdb_entry *entry = cfg->entry;
1333 struct net_bridge *br = cfg->br;
cfd56754
CW		 1334 struct net_bridge_mdb_entry *mp;
1335 struct net_bridge_port_group *p;
1336 struct net_bridge_port_group __rcu **pp;
9f52a514 1337 struct br_ip ip = cfg->group;
cfd56754
CW		 1338 int err = -EINVAL;
1339
cfd56754 1340 spin_lock_bh(&br->multicast_lock);
19e3a9c9 1341 mp = br_mdb_ip_get(br, &ip);
cfd56754
CW		 1342 if (!mp)
1343 goto unlock;
1344
1bc844ee
NA		 1345 /* host leave */
1346 if (entry->ifindex == mp->br->dev->ifindex && mp->host_joined) {
1347 br_multicast_host_leave(mp, false);
1348 err = 0;
81f19838 1349 br_mdb_notify(br->dev, mp, NULL, RTM_DELMDB);
1bc844ee
NA		 1350 if (!mp->ports && netif_running(br->dev))
1351 mod_timer(&mp->timer, jiffies);
1352 goto unlock;
1353 }
1354
cfd56754
CW		 1355 for (pp = &mp->ports;
1356 (p = mlock_dereference(*pp, br)) != NULL;
1357 pp = &p->next) {
085b53c8 1358 if (!p->key.port || p->key.port->dev->ifindex != entry->ifindex)
cfd56754
CW		 1359 continue;
1360
681590bd 1361 br_multicast_del_pg(mp, p, pp);
cfd56754 1362 err = 0;
cfd56754
CW		 1363 break;
1364 }
1365
1366unlock:
1367 spin_unlock_bh(&br->multicast_lock);
1368 return err;
1369}
1370
cc7f5022
IS		 1371int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1372 struct netlink_ext_ack *extack)
cfd56754 1373{
2594e906 1374 struct net_bridge_vlan_group *vg;
2594e906 1375 struct net_bridge_vlan *v;
cb453926 1376 struct br_mdb_config cfg;
cfd56754
CW		 1377 int err;
1378
cc7f5022 1379 err = br_mdb_config_init(&cfg, dev, tb, 0, extack);
cb453926
IS		 1380 if (err)
1381 return err;
1382
f2b5aac6 1383 if (cfg.p)
38661168
IS		 1384 vg = nbp_vlan_group(cfg.p);
1385 else
f2b5aac6 1386 vg = br_vlan_group(cfg.br);
e44deb2f 1387
f59783f5
NA		 1388 /* If vlan filtering is enabled and VLAN is not specified
1389 * delete mdb entry on all vlans configured on the port.
1390 */
f2b5aac6 1391 if (br_vlan_enabled(cfg.br->dev) && vg && cfg.entry->vid == 0) {
2594e906 1392 list_for_each_entry(v, &vg->vlan_list, vlist) {
f2b5aac6 1393 cfg.entry->vid = v->vid;
9f52a514 1394 cfg.group.vid = v->vid;
3ee56623 1395 err = __br_mdb_del(&cfg);
e44deb2f
SA		 1396 }
1397 } else {
3ee56623 1398 err = __br_mdb_del(&cfg);
e44deb2f
SA		 1399 }
1400
6afaae6d 1401 br_mdb_config_fini(&cfg);
cfd56754
CW		 1402 return err;
1403}
Linux 6.x block layer and io_uring tree(s)