]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blame - net/ipv6/mcast.c
projects / mirror_ubuntu-eoan-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
net: ipv6: mld: refactor query processing into v1/v2 functions
[mirror_ubuntu-eoan-kernel.git] / net / ipv6 / mcast.c
CommitLineData
1da177e4
LT		 1/*
2 * Multicast support for IPv6
1ab1457c 3 * Linux INET6 implementation
1da177e4
LT		 4 *
5 * Authors:
1ab1457c 6 * Pedro Roque <roque@di.fc.ul.pt>
1da177e4 7 *
1ab1457c 8 * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
1da177e4
LT		 9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
16/* Changes:
17 *
18 * yoshfuji : fix format of router-alert option
19 * YOSHIFUJI Hideaki @USAGI:
20 * Fixed source address for MLD message based on
21 * <draft-ietf-magma-mld-source-05.txt>.
22 * YOSHIFUJI Hideaki @USAGI:
23 * - Ignore Queries for invalid addresses.
24 * - MLD for link-local addresses.
25 * David L Stevens <dlstevens@us.ibm.com>:
26 * - MLDv2 support
27 */
28
1da177e4
LT		 29#include <linux/module.h>
30#include <linux/errno.h>
31#include <linux/types.h>
32#include <linux/string.h>
33#include <linux/socket.h>
34#include <linux/sockios.h>
35#include <linux/jiffies.h>
36#include <linux/times.h>
37#include <linux/net.h>
38#include <linux/in.h>
39#include <linux/in6.h>
40#include <linux/netdevice.h>
41#include <linux/if_arp.h>
42#include <linux/route.h>
43#include <linux/init.h>
44#include <linux/proc_fs.h>
45#include <linux/seq_file.h>
5a0e3ad6 46#include <linux/slab.h>
9d4a0314 47#include <linux/pkt_sched.h>
6e7cb837 48#include <net/mld.h>
1da177e4
LT		 49
50#include <linux/netfilter.h>
51#include <linux/netfilter_ipv6.h>
52
457c4cbc 53#include <net/net_namespace.h>
1da177e4
LT		 54#include <net/sock.h>
55#include <net/snmp.h>
56
57#include <net/ipv6.h>
58#include <net/protocol.h>
59#include <net/if_inet6.h>
60#include <net/ndisc.h>
61#include <net/addrconf.h>
62#include <net/ip6_route.h>
1ed8516f 63#include <net/inet_common.h>
1da177e4
LT		 64
65#include <net/ip6_checksum.h>
66
67/* Set to 3 to get tracing... */
68#define MCAST_DEBUG 2
69
70#if MCAST_DEBUG >= 3
71#define MDBG(x) printk x
72#else
73#define MDBG(x)
74#endif
75
6e7cb837
YH		 76/* Ensure that we have struct in6_addr aligned on 32bit word. */
77static void *__mld2_query_bugs[] __attribute__((__unused__)) = {
78 BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4),
79 BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4),
80 BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4)
1da177e4
LT		 81};
82
83static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
84
85/* Big mc list lock for all the sockets */
456b61bc 86static DEFINE_SPINLOCK(ipv6_sk_mc_lock);
1da177e4 87
1da177e4
LT		 88static void igmp6_join_group(struct ifmcaddr6 *ma);
89static void igmp6_leave_group(struct ifmcaddr6 *ma);
90static void igmp6_timer_handler(unsigned long data);
91
92static void mld_gq_timer_expire(unsigned long data);
93static void mld_ifc_timer_expire(unsigned long data);
94static void mld_ifc_event(struct inet6_dev *idev);
95static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
b71d1d42 96static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr);
1da177e4 97static void mld_clear_delrec(struct inet6_dev *idev);
6c567b78 98static bool mld_in_v1_mode(const struct inet6_dev *idev);
1da177e4
LT		 99static int sf_setstate(struct ifmcaddr6 *pmc);
100static void sf_markstate(struct ifmcaddr6 *pmc);
101static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
b71d1d42
ED		 102static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
103 int sfmode, int sfcount, const struct in6_addr *psfsrc,
1da177e4 104 int delta);
b71d1d42
ED		 105static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
106 int sfmode, int sfcount, const struct in6_addr *psfsrc,
1da177e4
LT		 107 int delta);
108static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
109 struct inet6_dev *idev);
110
1da177e4 111#define MLD_QRV_DEFAULT 2
89225d1c
DB		 112/* RFC3810, 9.2. Query Interval */
113#define MLD_QI_DEFAULT (125 * HZ)
114/* RFC3810, 9.3. Query Response Interval */
115#define MLD_QRI_DEFAULT (10 * HZ)
1da177e4 116
9fd07841
DB		 117/* RFC3810, 8.1 Query Version Distinctions */
118#define MLD_V1_QUERY_LEN 24
119#define MLD_V2_QUERY_LEN_MIN 28
120
6f4353d8 121#define IPV6_MLD_MAX_MSF 64
1da177e4 122
ab32ea5d 123int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
1da177e4
LT		 124
125/*
126 * socket join on multicast group
127 */
128
456b61bc
ED		 129#define for_each_pmc_rcu(np, pmc) \
130 for (pmc = rcu_dereference(np->ipv6_mc_list); \
131 pmc != NULL; \
132 pmc = rcu_dereference(pmc->next))
133
fc4eba58
HFS		 134static int unsolicited_report_interval(struct inet6_dev *idev)
135{
136 int iv;
137
6c567b78 138 if (mld_in_v1_mode(idev))
fc4eba58
HFS		 139 iv = idev->cnf.mldv1_unsolicited_report_interval;
140 else
141 iv = idev->cnf.mldv2_unsolicited_report_interval;
142
143 return iv > 0 ? iv : 1;
144}
145
9acd9f3a 146int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
1da177e4
LT		 147{
148 struct net_device *dev = NULL;
149 struct ipv6_mc_socklist *mc_lst;
150 struct ipv6_pinfo *np = inet6_sk(sk);
3b1e0a65 151 struct net *net = sock_net(sk);
1da177e4
LT		 152 int err;
153
154 if (!ipv6_addr_is_multicast(addr))
155 return -EINVAL;
156
456b61bc
ED		 157 rcu_read_lock();
158 for_each_pmc_rcu(np, mc_lst) {
c9e3e8b6
DS		 159 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
160 ipv6_addr_equal(&mc_lst->addr, addr)) {
456b61bc 161 rcu_read_unlock();
c9e3e8b6
DS		 162 return -EADDRINUSE;
163 }
164 }
456b61bc 165 rcu_read_unlock();
c9e3e8b6 166
1da177e4
LT		 167 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
168
169 if (mc_lst == NULL)
170 return -ENOMEM;
171
172 mc_lst->next = NULL;
4e3fd7a0 173 mc_lst->addr = *addr;
1da177e4 174
96b52e61 175 rcu_read_lock();
1da177e4
LT		 176 if (ifindex == 0) {
177 struct rt6_info *rt;
b8ad0cbc 178 rt = rt6_lookup(net, addr, NULL, 0, 0);
1da177e4 179 if (rt) {
d1918542 180 dev = rt->dst.dev;
94e187c0 181 ip6_rt_put(rt);
1da177e4
LT		 182 }
183 } else
96b52e61 184 dev = dev_get_by_index_rcu(net, ifindex);
1da177e4
LT		 185
186 if (dev == NULL) {
96b52e61 187 rcu_read_unlock();
1da177e4
LT		 188 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
189 return -ENODEV;
190 }
191
192 mc_lst->ifindex = dev->ifindex;
193 mc_lst->sfmode = MCAST_EXCLUDE;
196433c5 194 rwlock_init(&mc_lst->sflock);
1da177e4
LT		 195 mc_lst->sflist = NULL;
196
197 /*
198 * now add/increase the group membership on the device
199 */
200
201 err = ipv6_dev_mc_inc(dev, addr);
202
203 if (err) {
96b52e61 204 rcu_read_unlock();
1da177e4 205 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
1da177e4
LT		 206 return err;
207 }
208
456b61bc 209 spin_lock(&ipv6_sk_mc_lock);
1da177e4 210 mc_lst->next = np->ipv6_mc_list;
456b61bc
ED		 211 rcu_assign_pointer(np->ipv6_mc_list, mc_lst);
212 spin_unlock(&ipv6_sk_mc_lock);
1da177e4 213
96b52e61 214 rcu_read_unlock();
1da177e4
LT		 215
216 return 0;
217}
218
219/*
220 * socket leave on multicast group
221 */
9acd9f3a 222int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
1da177e4
LT		 223{
224 struct ipv6_pinfo *np = inet6_sk(sk);
456b61bc
ED		 225 struct ipv6_mc_socklist *mc_lst;
226 struct ipv6_mc_socklist __rcu **lnk;
3b1e0a65 227 struct net *net = sock_net(sk);
1da177e4 228
a858d64b
LW		 229 if (!ipv6_addr_is_multicast(addr))
230 return -EINVAL;
231
456b61bc
ED		 232 spin_lock(&ipv6_sk_mc_lock);
233 for (lnk = &np->ipv6_mc_list;
234 (mc_lst = rcu_dereference_protected(*lnk,
235 lockdep_is_held(&ipv6_sk_mc_lock))) !=NULL ;
236 lnk = &mc_lst->next) {
1da177e4
LT		 237 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
238 ipv6_addr_equal(&mc_lst->addr, addr)) {
239 struct net_device *dev;
240
241 *lnk = mc_lst->next;
456b61bc 242 spin_unlock(&ipv6_sk_mc_lock);
1da177e4 243
96b52e61
ED		 244 rcu_read_lock();
245 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
b8ad0cbc 246 if (dev != NULL) {
96b52e61 247 struct inet6_dev *idev = __in6_dev_get(dev);
1da177e4 248
acd6e00b 249 (void) ip6_mc_leave_src(sk, mc_lst, idev);
96b52e61 250 if (idev)
1da177e4 251 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
acd6e00b
DS		 252 } else
253 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
96b52e61 254 rcu_read_unlock();
456b61bc 255 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
e3cbf28f 256 kfree_rcu(mc_lst, rcu);
1da177e4
LT		 257 return 0;
258 }
259 }
456b61bc 260 spin_unlock(&ipv6_sk_mc_lock);
1da177e4 261
9951f036 262 return -EADDRNOTAVAIL;
1da177e4
LT		 263}
264
96b52e61
ED		 265/* called with rcu_read_lock() */
266static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net,
b71d1d42 267 const struct in6_addr *group,
96b52e61 268 int ifindex)
1da177e4
LT		 269{
270 struct net_device *dev = NULL;
271 struct inet6_dev *idev = NULL;
272
273 if (ifindex == 0) {
96b52e61 274 struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0);
1da177e4 275
1da177e4 276 if (rt) {
d1918542 277 dev = rt->dst.dev;
94e187c0 278 ip6_rt_put(rt);
1da177e4
LT		 279 }
280 } else
96b52e61 281 dev = dev_get_by_index_rcu(net, ifindex);
1da177e4
LT		 282
283 if (!dev)
96b52e61
ED		 284 return NULL;
285 idev = __in6_dev_get(dev);
448eb71f 286 if (!idev)
8a22c99a 287 return NULL;
1da177e4 288 read_lock_bh(&idev->lock);
96b52e61
ED		 289 if (idev->dead) {
290 read_unlock_bh(&idev->lock);
291 return NULL;
292 }
1da177e4
LT		 293 return idev;
294}
295
296void ipv6_sock_mc_close(struct sock *sk)
297{
298 struct ipv6_pinfo *np = inet6_sk(sk);
299 struct ipv6_mc_socklist *mc_lst;
3b1e0a65 300 struct net *net = sock_net(sk);
1da177e4 301
0e1efe9d
ED		 302 if (!rcu_access_pointer(np->ipv6_mc_list))
303 return;
304
456b61bc
ED		 305 spin_lock(&ipv6_sk_mc_lock);
306 while ((mc_lst = rcu_dereference_protected(np->ipv6_mc_list,
307 lockdep_is_held(&ipv6_sk_mc_lock))) != NULL) {
1da177e4
LT		 308 struct net_device *dev;
309
310 np->ipv6_mc_list = mc_lst->next;
456b61bc 311 spin_unlock(&ipv6_sk_mc_lock);
1da177e4 312
96b52e61
ED		 313 rcu_read_lock();
314 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
1da177e4 315 if (dev) {
96b52e61 316 struct inet6_dev *idev = __in6_dev_get(dev);
1da177e4 317
acd6e00b 318 (void) ip6_mc_leave_src(sk, mc_lst, idev);
96b52e61 319 if (idev)
1da177e4 320 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
acd6e00b
DS		 321 } else
322 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
96b52e61 323 rcu_read_unlock();
1da177e4 324
456b61bc 325 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
e3cbf28f 326 kfree_rcu(mc_lst, rcu);
456b61bc
ED		 327
328 spin_lock(&ipv6_sk_mc_lock);
1da177e4 329 }
456b61bc 330 spin_unlock(&ipv6_sk_mc_lock);
1da177e4
LT		 331}
332
333int ip6_mc_source(int add, int omode, struct sock *sk,
334 struct group_source_req *pgsr)
335{
336 struct in6_addr *source, *group;
337 struct ipv6_mc_socklist *pmc;
1da177e4
LT		 338 struct inet6_dev *idev;
339 struct ipv6_pinfo *inet6 = inet6_sk(sk);
340 struct ip6_sf_socklist *psl;
3b1e0a65 341 struct net *net = sock_net(sk);
1da177e4 342 int i, j, rv;
c9e3e8b6 343 int leavegroup = 0;
5ab4a6c8 344 int pmclocked = 0;
1da177e4
LT		 345 int err;
346
1da177e4
LT		 347 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
348 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
349
350 if (!ipv6_addr_is_multicast(group))
351 return -EINVAL;
352
96b52e61
ED		 353 rcu_read_lock();
354 idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface);
355 if (!idev) {
356 rcu_read_unlock();
1da177e4 357 return -ENODEV;
96b52e61 358 }
1da177e4
LT		 359
360 err = -EADDRNOTAVAIL;
361
456b61bc 362 for_each_pmc_rcu(inet6, pmc) {
1da177e4
LT		 363 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
364 continue;
365 if (ipv6_addr_equal(&pmc->addr, group))
366 break;
367 }
917f2f10
DS		 368 if (!pmc) { /* must have a prior join */
369 err = -EINVAL;
1da177e4 370 goto done;
917f2f10 371 }
1da177e4
LT		 372 /* if a source filter was set, must be the same mode as before */
373 if (pmc->sflist) {
917f2f10
DS		 374 if (pmc->sfmode != omode) {
375 err = -EINVAL;
1da177e4 376 goto done;
917f2f10 377 }
1da177e4
LT		 378 } else if (pmc->sfmode != omode) {
379 /* allow mode switches for empty-set filters */
380 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
381 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
382 pmc->sfmode = omode;
383 }
384
96b52e61 385 write_lock(&pmc->sflock);
5ab4a6c8
DS		 386 pmclocked = 1;
387
1da177e4
LT		 388 psl = pmc->sflist;
389 if (!add) {
390 if (!psl)
917f2f10 391 goto done; /* err = -EADDRNOTAVAIL */
1da177e4
LT		 392 rv = !0;
393 for (i=0; i<psl->sl_count; i++) {
07c2fecc 394 rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
1da177e4
LT		 395 if (rv == 0)
396 break;
397 }
398 if (rv) /* source not found */
917f2f10 399 goto done; /* err = -EADDRNOTAVAIL */
1da177e4 400
c9e3e8b6
DS		 401 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
402 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
403 leavegroup = 1;
404 goto done;
405 }
406
1da177e4
LT		 407 /* update the interface filter */
408 ip6_mc_del_src(idev, group, omode, 1, source, 1);
409
410 for (j=i+1; j<psl->sl_count; j++)
411 psl->sl_addr[j-1] = psl->sl_addr[j];
412 psl->sl_count--;
413 err = 0;
414 goto done;
415 }
416 /* else, add a new source to the filter */
417
418 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
419 err = -ENOBUFS;
420 goto done;
421 }
422 if (!psl || psl->sl_count == psl->sl_max) {
423 struct ip6_sf_socklist *newpsl;
424 int count = IP6_SFBLOCK;
425
426 if (psl)
427 count += psl->sl_max;
8b3a7005 428 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
1da177e4
LT		 429 if (!newpsl) {
430 err = -ENOBUFS;
431 goto done;
432 }
433 newpsl->sl_max = count;
434 newpsl->sl_count = count - IP6_SFBLOCK;
435 if (psl) {
436 for (i=0; i<psl->sl_count; i++)
437 newpsl->sl_addr[i] = psl->sl_addr[i];
438 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
439 }
440 pmc->sflist = psl = newpsl;
441 }
442 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
443 for (i=0; i<psl->sl_count; i++) {
07c2fecc 444 rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
56db1c5f
JS		 445 if (rv == 0) /* There is an error in the address. */
446 goto done;
1da177e4 447 }
1da177e4
LT		 448 for (j=psl->sl_count-1; j>=i; j--)
449 psl->sl_addr[j+1] = psl->sl_addr[j];
450 psl->sl_addr[i] = *source;
451 psl->sl_count++;
452 err = 0;
453 /* update the interface list */
454 ip6_mc_add_src(idev, group, omode, 1, source, 1);
455done:
5ab4a6c8 456 if (pmclocked)
96b52e61 457 write_unlock(&pmc->sflock);
1da177e4 458 read_unlock_bh(&idev->lock);
96b52e61 459 rcu_read_unlock();
c9e3e8b6
DS		 460 if (leavegroup)
461 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
1da177e4
LT		 462 return err;
463}
464
465int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
466{
b71d1d42 467 const struct in6_addr *group;
1da177e4 468 struct ipv6_mc_socklist *pmc;
1da177e4
LT		 469 struct inet6_dev *idev;
470 struct ipv6_pinfo *inet6 = inet6_sk(sk);
471 struct ip6_sf_socklist *newpsl, *psl;
3b1e0a65 472 struct net *net = sock_net(sk);
9951f036 473 int leavegroup = 0;
1da177e4
LT		 474 int i, err;
475
476 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
477
478 if (!ipv6_addr_is_multicast(group))
479 return -EINVAL;
480 if (gsf->gf_fmode != MCAST_INCLUDE &&
481 gsf->gf_fmode != MCAST_EXCLUDE)
482 return -EINVAL;
483
96b52e61
ED		 484 rcu_read_lock();
485 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
1da177e4 486
96b52e61
ED		 487 if (!idev) {
488 rcu_read_unlock();
1da177e4 489 return -ENODEV;
96b52e61 490 }
1da177e4 491
9c05989b 492 err = 0;
5ab4a6c8 493
9951f036
DS		 494 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
495 leavegroup = 1;
496 goto done;
497 }
498
456b61bc 499 for_each_pmc_rcu(inet6, pmc) {
1da177e4
LT		 500 if (pmc->ifindex != gsf->gf_interface)
501 continue;
502 if (ipv6_addr_equal(&pmc->addr, group))
503 break;
504 }
917f2f10
DS		 505 if (!pmc) { /* must have a prior join */
506 err = -EINVAL;
1da177e4 507 goto done;
917f2f10 508 }
1da177e4 509 if (gsf->gf_numsrc) {
8b3a7005
KK		 510 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
511 GFP_ATOMIC);
1da177e4
LT		 512 if (!newpsl) {
513 err = -ENOBUFS;
514 goto done;
515 }
516 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
517 for (i=0; i<newpsl->sl_count; ++i) {
518 struct sockaddr_in6 *psin6;
519
520 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
521 newpsl->sl_addr[i] = psin6->sin6_addr;
522 }
523 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
524 newpsl->sl_count, newpsl->sl_addr, 0);
525 if (err) {
526 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
527 goto done;
528 }
8713dbf0 529 } else {
1da177e4 530 newpsl = NULL;
8713dbf0
YZ		 531 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
532 }
5ab4a6c8 533
96b52e61 534 write_lock(&pmc->sflock);
1da177e4
LT		 535 psl = pmc->sflist;
536 if (psl) {
537 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
538 psl->sl_count, psl->sl_addr, 0);
539 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
540 } else
541 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
542 pmc->sflist = newpsl;
543 pmc->sfmode = gsf->gf_fmode;
96b52e61 544 write_unlock(&pmc->sflock);
917f2f10 545 err = 0;
1da177e4
LT		 546done:
547 read_unlock_bh(&idev->lock);
96b52e61 548 rcu_read_unlock();
9951f036
DS		 549 if (leavegroup)
550 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
1da177e4
LT		 551 return err;
552}
553
554int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
555 struct group_filter __user *optval, int __user *optlen)
556{
557 int err, i, count, copycount;
b71d1d42 558 const struct in6_addr *group;
1da177e4
LT		 559 struct ipv6_mc_socklist *pmc;
560 struct inet6_dev *idev;
1da177e4
LT		 561 struct ipv6_pinfo *inet6 = inet6_sk(sk);
562 struct ip6_sf_socklist *psl;
3b1e0a65 563 struct net *net = sock_net(sk);
1da177e4
LT		 564
565 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
566
567 if (!ipv6_addr_is_multicast(group))
568 return -EINVAL;
569
96b52e61
ED		 570 rcu_read_lock();
571 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
1da177e4 572
96b52e61
ED		 573 if (!idev) {
574 rcu_read_unlock();
1da177e4 575 return -ENODEV;
96b52e61 576 }
1da177e4
LT		 577
578 err = -EADDRNOTAVAIL;
5ab4a6c8
DS		 579 /*
580 * changes to the ipv6_mc_list require the socket lock and
581 * a read lock on ip6_sk_mc_lock. We have the socket lock,
582 * so reading the list is safe.
583 */
1da177e4 584
456b61bc 585 for_each_pmc_rcu(inet6, pmc) {
1da177e4
LT		 586 if (pmc->ifindex != gsf->gf_interface)
587 continue;
588 if (ipv6_addr_equal(group, &pmc->addr))
589 break;
590 }
591 if (!pmc) /* must have a prior join */
592 goto done;
593 gsf->gf_fmode = pmc->sfmode;
594 psl = pmc->sflist;
595 count = psl ? psl->sl_count : 0;
596 read_unlock_bh(&idev->lock);
96b52e61 597 rcu_read_unlock();
1da177e4
LT		 598
599 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
600 gsf->gf_numsrc = count;
601 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
602 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
603 return -EFAULT;
604 }
5ab4a6c8
DS		 605 /* changes to psl require the socket lock, a read lock on
606 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
607 * have the socket lock, so reading here is safe.
608 */
1da177e4
LT		 609 for (i=0; i<copycount; i++) {
610 struct sockaddr_in6 *psin6;
611 struct sockaddr_storage ss;
612
613 psin6 = (struct sockaddr_in6 *)&ss;
614 memset(&ss, 0, sizeof(ss));
615 psin6->sin6_family = AF_INET6;
616 psin6->sin6_addr = psl->sl_addr[i];
1ab1457c 617 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
1da177e4
LT		 618 return -EFAULT;
619 }
620 return 0;
621done:
622 read_unlock_bh(&idev->lock);
96b52e61 623 rcu_read_unlock();
1da177e4
LT		 624 return err;
625}
626
a50feda5
ED		 627bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
628 const struct in6_addr *src_addr)
1da177e4
LT		 629{
630 struct ipv6_pinfo *np = inet6_sk(sk);
631 struct ipv6_mc_socklist *mc;
632 struct ip6_sf_socklist *psl;
a50feda5 633 bool rv = true;
1da177e4 634
456b61bc
ED		 635 rcu_read_lock();
636 for_each_pmc_rcu(np, mc) {
1da177e4
LT		 637 if (ipv6_addr_equal(&mc->addr, mc_addr))
638 break;
639 }
640 if (!mc) {
456b61bc 641 rcu_read_unlock();
a50feda5 642 return true;
1da177e4 643 }
5ab4a6c8 644 read_lock(&mc->sflock);
1da177e4
LT		 645 psl = mc->sflist;
646 if (!psl) {
647 rv = mc->sfmode == MCAST_EXCLUDE;
648 } else {
649 int i;
650
651 for (i=0; i<psl->sl_count; i++) {
652 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
653 break;
654 }
655 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
a50feda5 656 rv = false;
1da177e4 657 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
a50feda5 658 rv = false;
1da177e4 659 }
5ab4a6c8 660 read_unlock(&mc->sflock);
456b61bc 661 rcu_read_unlock();
1da177e4
LT		 662
663 return rv;
664}
665
666static void ma_put(struct ifmcaddr6 *mc)
667{
668 if (atomic_dec_and_test(&mc->mca_refcnt)) {
669 in6_dev_put(mc->idev);
670 kfree(mc);
671 }
672}
673
674static void igmp6_group_added(struct ifmcaddr6 *mc)
675{
676 struct net_device *dev = mc->idev->dev;
677 char buf[MAX_ADDR_LEN];
678
ec16ef22
YH		 679 if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
680 IPV6_ADDR_SCOPE_LINKLOCAL)
681 return;
682
1da177e4
LT		 683 spin_lock_bh(&mc->mca_lock);
684 if (!(mc->mca_flags&MAF_LOADED)) {
685 mc->mca_flags |= MAF_LOADED;
686 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
22bedad3 687 dev_mc_add(dev, buf);
1da177e4
LT		 688 }
689 spin_unlock_bh(&mc->mca_lock);
690
691 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
692 return;
693
6c567b78 694 if (mld_in_v1_mode(mc->idev)) {
1da177e4
LT		 695 igmp6_join_group(mc);
696 return;
697 }
698 /* else v2 */
699
700 mc->mca_crcount = mc->idev->mc_qrv;
701 mld_ifc_event(mc->idev);
702}
703
704static void igmp6_group_dropped(struct ifmcaddr6 *mc)
705{
706 struct net_device *dev = mc->idev->dev;
707 char buf[MAX_ADDR_LEN];
708
ec16ef22
YH		 709 if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
710 IPV6_ADDR_SCOPE_LINKLOCAL)
711 return;
712
1da177e4
LT		 713 spin_lock_bh(&mc->mca_lock);
714 if (mc->mca_flags&MAF_LOADED) {
715 mc->mca_flags &= ~MAF_LOADED;
716 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
22bedad3 717 dev_mc_del(dev, buf);
1da177e4
LT		 718 }
719
720 if (mc->mca_flags & MAF_NOREPORT)
721 goto done;
722 spin_unlock_bh(&mc->mca_lock);
723
724 if (!mc->idev->dead)
725 igmp6_leave_group(mc);
726
727 spin_lock_bh(&mc->mca_lock);
728 if (del_timer(&mc->mca_timer))
729 atomic_dec(&mc->mca_refcnt);
730done:
731 ip6_mc_clear_src(mc);
732 spin_unlock_bh(&mc->mca_lock);
733}
734
735/*
736 * deleted ifmcaddr6 manipulation
737 */
738static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
739{
740 struct ifmcaddr6 *pmc;
741
742 /* this is an "ifmcaddr6" for convenience; only the fields below
743 * are actually used. In particular, the refcnt and users are not
744 * used for management of the delete list. Using the same structure
745 * for deleted items allows change reports to use common code with
746 * non-deleted or query-response MCA's.
747 */
0c600eda 748 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
1da177e4
LT		 749 if (!pmc)
750 return;
0c600eda 751
1da177e4
LT		 752 spin_lock_bh(&im->mca_lock);
753 spin_lock_init(&pmc->mca_lock);
754 pmc->idev = im->idev;
755 in6_dev_hold(idev);
756 pmc->mca_addr = im->mca_addr;
757 pmc->mca_crcount = idev->mc_qrv;
758 pmc->mca_sfmode = im->mca_sfmode;
759 if (pmc->mca_sfmode == MCAST_INCLUDE) {
760 struct ip6_sf_list *psf;
761
762 pmc->mca_tomb = im->mca_tomb;
763 pmc->mca_sources = im->mca_sources;
764 im->mca_tomb = im->mca_sources = NULL;
765 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
766 psf->sf_crcount = pmc->mca_crcount;
767 }
768 spin_unlock_bh(&im->mca_lock);
769
6457d26b 770 spin_lock_bh(&idev->mc_lock);
1da177e4
LT		 771 pmc->next = idev->mc_tomb;
772 idev->mc_tomb = pmc;
6457d26b 773 spin_unlock_bh(&idev->mc_lock);
1da177e4
LT		 774}
775
b71d1d42 776static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca)
1da177e4
LT		 777{
778 struct ifmcaddr6 *pmc, *pmc_prev;
779 struct ip6_sf_list *psf, *psf_next;
780
6457d26b 781 spin_lock_bh(&idev->mc_lock);
1da177e4
LT		 782 pmc_prev = NULL;
783 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
784 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
785 break;
786 pmc_prev = pmc;
787 }
788 if (pmc) {
789 if (pmc_prev)
790 pmc_prev->next = pmc->next;
791 else
792 idev->mc_tomb = pmc->next;
793 }
6457d26b
SH		 794 spin_unlock_bh(&idev->mc_lock);
795
1da177e4
LT		 796 if (pmc) {
797 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
798 psf_next = psf->sf_next;
799 kfree(psf);
800 }
801 in6_dev_put(pmc->idev);
802 kfree(pmc);
803 }
804}
805
806static void mld_clear_delrec(struct inet6_dev *idev)
807{
808 struct ifmcaddr6 *pmc, *nextpmc;
809
6457d26b 810 spin_lock_bh(&idev->mc_lock);
1da177e4
LT		 811 pmc = idev->mc_tomb;
812 idev->mc_tomb = NULL;
6457d26b 813 spin_unlock_bh(&idev->mc_lock);
1da177e4
LT		 814
815 for (; pmc; pmc = nextpmc) {
816 nextpmc = pmc->next;
817 ip6_mc_clear_src(pmc);
818 in6_dev_put(pmc->idev);
819 kfree(pmc);
820 }
821
822 /* clear dead sources, too */
823 read_lock_bh(&idev->lock);
824 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
825 struct ip6_sf_list *psf, *psf_next;
826
827 spin_lock_bh(&pmc->mca_lock);
828 psf = pmc->mca_tomb;
829 pmc->mca_tomb = NULL;
830 spin_unlock_bh(&pmc->mca_lock);
831 for (; psf; psf=psf_next) {
832 psf_next = psf->sf_next;
833 kfree(psf);
834 }
835 }
836 read_unlock_bh(&idev->lock);
837}
838
839
840/*
841 * device multicast group inc (add if not found)
842 */
9acd9f3a 843int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
1da177e4
LT		 844{
845 struct ifmcaddr6 *mc;
846 struct inet6_dev *idev;
847
96b52e61 848 /* we need to take a reference on idev */
1da177e4
LT		 849 idev = in6_dev_get(dev);
850
851 if (idev == NULL)
852 return -EINVAL;
853
854 write_lock_bh(&idev->lock);
855 if (idev->dead) {
856 write_unlock_bh(&idev->lock);
857 in6_dev_put(idev);
858 return -ENODEV;
859 }
860
861 for (mc = idev->mc_list; mc; mc = mc->next) {
862 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
863 mc->mca_users++;
864 write_unlock_bh(&idev->lock);
865 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
866 NULL, 0);
867 in6_dev_put(idev);
868 return 0;
869 }
870 }
871
872 /*
873 * not found: create a new one.
874 */
875
0c600eda 876 mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
1da177e4
LT		 877
878 if (mc == NULL) {
879 write_unlock_bh(&idev->lock);
880 in6_dev_put(idev);
881 return -ENOMEM;
882 }
883
b24b8a24 884 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
1da177e4 885
4e3fd7a0 886 mc->mca_addr = *addr;
96b52e61 887 mc->idev = idev; /* (reference taken) */
1da177e4
LT		 888 mc->mca_users = 1;
889 /* mca_stamp should be updated upon changes */
890 mc->mca_cstamp = mc->mca_tstamp = jiffies;
891 atomic_set(&mc->mca_refcnt, 2);
892 spin_lock_init(&mc->mca_lock);
893
894 /* initial mode is (EX, empty) */
895 mc->mca_sfmode = MCAST_EXCLUDE;
896 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
897
898 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
899 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
900 mc->mca_flags |= MAF_NOREPORT;
901
902 mc->next = idev->mc_list;
903 idev->mc_list = mc;
904 write_unlock_bh(&idev->lock);
905
906 mld_del_delrec(idev, &mc->mca_addr);
907 igmp6_group_added(mc);
908 ma_put(mc);
909 return 0;
910}
911
912/*
913 * device multicast group del
914 */
9acd9f3a 915int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
1da177e4
LT		 916{
917 struct ifmcaddr6 *ma, **map;
918
919 write_lock_bh(&idev->lock);
920 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
921 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
922 if (--ma->mca_users == 0) {
923 *map = ma->next;
924 write_unlock_bh(&idev->lock);
925
926 igmp6_group_dropped(ma);
927
928 ma_put(ma);
929 return 0;
930 }
931 write_unlock_bh(&idev->lock);
932 return 0;
933 }
934 }
935 write_unlock_bh(&idev->lock);
936
937 return -ENOENT;
938}
939
9acd9f3a 940int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
1da177e4 941{
96b52e61 942 struct inet6_dev *idev;
1da177e4
LT		 943 int err;
944
96b52e61 945 rcu_read_lock();
1da177e4 946
96b52e61
ED		 947 idev = __in6_dev_get(dev);
948 if (!idev)
949 err = -ENODEV;
950 else
951 err = __ipv6_dev_mc_dec(idev, addr);
1da177e4 952
96b52e61 953 rcu_read_unlock();
1da177e4
LT		 954 return err;
955}
956
1da177e4
LT		 957/*
958 * check if the interface/address pair is valid
959 */
a50feda5
ED		 960bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
961 const struct in6_addr *src_addr)
1da177e4
LT		 962{
963 struct inet6_dev *idev;
964 struct ifmcaddr6 *mc;
a50feda5 965 bool rv = false;
1da177e4 966
96b52e61
ED		 967 rcu_read_lock();
968 idev = __in6_dev_get(dev);
1da177e4
LT		 969 if (idev) {
970 read_lock_bh(&idev->lock);
971 for (mc = idev->mc_list; mc; mc=mc->next) {
972 if (ipv6_addr_equal(&mc->mca_addr, group))
973 break;
974 }
975 if (mc) {
976 if (src_addr && !ipv6_addr_any(src_addr)) {
977 struct ip6_sf_list *psf;
978
979 spin_lock_bh(&mc->mca_lock);
980 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
981 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
982 break;
983 }
984 if (psf)
985 rv = psf->sf_count[MCAST_INCLUDE] ||
986 psf->sf_count[MCAST_EXCLUDE] !=
987 mc->mca_sfcount[MCAST_EXCLUDE];
988 else
989 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
990 spin_unlock_bh(&mc->mca_lock);
991 } else
a50feda5 992 rv = true; /* don't filter unspecified source */
1da177e4
LT		 993 }
994 read_unlock_bh(&idev->lock);
1da177e4 995 }
96b52e61 996 rcu_read_unlock();
1da177e4
LT		 997 return rv;
998}
999
1000static void mld_gq_start_timer(struct inet6_dev *idev)
1001{
c2cef4e8 1002 unsigned long tv = net_random() % idev->mc_maxdelay;
1da177e4
LT		 1003
1004 idev->mc_gq_running = 1;
1005 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1006 in6_dev_hold(idev);
1007}
1008
c2cef4e8 1009static void mld_ifc_start_timer(struct inet6_dev *idev, unsigned long delay)
1da177e4 1010{
c2cef4e8 1011 unsigned long tv = net_random() % delay;
1da177e4
LT		 1012
1013 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1014 in6_dev_hold(idev);
1015}
1016
c2cef4e8 1017static void mld_dad_start_timer(struct inet6_dev *idev, unsigned long delay)
b173ee48 1018{
c2cef4e8 1019 unsigned long tv = net_random() % delay;
b173ee48
HFS		 1020
1021 if (!mod_timer(&idev->mc_dad_timer, jiffies+tv+2))
1022 in6_dev_hold(idev);
1023}
1024
1da177e4
LT		 1025/*
1026 * IGMP handling (alias multicast ICMPv6 messages)
1027 */
1028
1029static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1030{
1031 unsigned long delay = resptime;
1032
1033 /* Do not start timer for these addresses */
1034 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1035 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1036 return;
1037
1038 if (del_timer(&ma->mca_timer)) {
1039 atomic_dec(&ma->mca_refcnt);
1040 delay = ma->mca_timer.expires - jiffies;
1041 }
1042
cc7f7ab7
DB		 1043 if (delay >= resptime)
1044 delay = net_random() % resptime;
1045
1da177e4
LT		 1046 ma->mca_timer.expires = jiffies + delay;
1047 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1048 atomic_inc(&ma->mca_refcnt);
1049 ma->mca_flags |= MAF_TIMER_RUNNING;
1050}
1051
5ab4a6c8 1052/* mark EXCLUDE-mode sources */
a50feda5
ED		 1053static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
1054 const struct in6_addr *srcs)
1da177e4
LT		 1055{
1056 struct ip6_sf_list *psf;
1057 int i, scount;
1058
1059 scount = 0;
1060 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1061 if (scount == nsrcs)
1062 break;
5ab4a6c8
DS		 1063 for (i=0; i<nsrcs; i++) {
1064 /* skip inactive filters */
e05c4ad3 1065 if (psf->sf_count[MCAST_INCLUDE] ||
5ab4a6c8
DS		 1066 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1067 psf->sf_count[MCAST_EXCLUDE])
ce713ee5 1068 break;
5ab4a6c8
DS		 1069 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1070 scount++;
1071 break;
1072 }
1073 }
1074 }
1075 pmc->mca_flags &= ~MAF_GSQUERY;
1076 if (scount == nsrcs) /* all sources excluded */
a50feda5
ED		 1077 return false;
1078 return true;
5ab4a6c8
DS		 1079}
1080
a50feda5
ED		 1081static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1082 const struct in6_addr *srcs)
5ab4a6c8
DS		 1083{
1084 struct ip6_sf_list *psf;
1085 int i, scount;
1086
1087 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1088 return mld_xmarksources(pmc, nsrcs, srcs);
1089
1090 /* mark INCLUDE-mode sources */
1091
1092 scount = 0;
1093 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1094 if (scount == nsrcs)
1095 break;
1096 for (i=0; i<nsrcs; i++) {
1da177e4
LT		 1097 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1098 psf->sf_gsresp = 1;
1099 scount++;
1100 break;
1101 }
5ab4a6c8
DS		 1102 }
1103 }
1104 if (!scount) {
1105 pmc->mca_flags &= ~MAF_GSQUERY;
a50feda5 1106 return false;
1da177e4 1107 }
5ab4a6c8 1108 pmc->mca_flags |= MAF_GSQUERY;
a50feda5 1109 return true;
1da177e4
LT		 1110}
1111
58c0ecfd
DB		 1112static int mld_force_mld_version(const struct inet6_dev *idev)
1113{
1114 /* Normally, both are 0 here. If enforcement to a particular is
1115 * being used, individual device enforcement will have a lower
1116 * precedence over 'all' device (.../conf/all/force_mld_version).
1117 */
1118
1119 if (dev_net(idev->dev)->ipv6.devconf_all->force_mld_version != 0)
1120 return dev_net(idev->dev)->ipv6.devconf_all->force_mld_version;
1121 else
1122 return idev->cnf.force_mld_version;
1123}
1124
1125static bool mld_in_v2_mode_only(const struct inet6_dev *idev)
1126{
1127 return mld_force_mld_version(idev) == 2;
1128}
1129
1130static bool mld_in_v1_mode_only(const struct inet6_dev *idev)
1131{
1132 return mld_force_mld_version(idev) == 1;
1133}
1134
6c567b78
DB		 1135static bool mld_in_v1_mode(const struct inet6_dev *idev)
1136{
58c0ecfd
DB		 1137 if (mld_in_v2_mode_only(idev))
1138 return false;
1139 if (mld_in_v1_mode_only(idev))
6c567b78
DB		 1140 return true;
1141 if (idev->mc_v1_seen && time_before(jiffies, idev->mc_v1_seen))
1142 return true;
1143
1144 return false;
1145}
1146
89225d1c
DB		 1147static void mld_set_v1_mode(struct inet6_dev *idev)
1148{
1149 /* RFC3810, relevant sections:
1150 * - 9.1. Robustness Variable
1151 * - 9.2. Query Interval
1152 * - 9.3. Query Response Interval
1153 * - 9.12. Older Version Querier Present Timeout
1154 */
1155 unsigned long switchback;
1156
1157 switchback = (idev->mc_qrv * idev->mc_qi) + idev->mc_qri;
1158
1159 idev->mc_v1_seen = jiffies + switchback;
1160}
1161
1162static void mld_update_qrv(struct inet6_dev *idev,
1163 const struct mld2_query *mlh2)
1164{
1165 /* RFC3810, relevant sections:
1166 * - 5.1.8. QRV (Querier's Robustness Variable)
1167 * - 9.1. Robustness Variable
1168 */
1169
1170 /* The value of the Robustness Variable MUST NOT be zero,
1171 * and SHOULD NOT be one. Catch this here if we ever run
1172 * into such a case in future.
1173 */
1174 WARN_ON(idev->mc_qrv == 0);
1175
1176 if (mlh2->mld2q_qrv > 0)
1177 idev->mc_qrv = mlh2->mld2q_qrv;
1178
1179 if (unlikely(idev->mc_qrv < 2)) {
1180 net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n",
1181 idev->mc_qrv, MLD_QRV_DEFAULT);
1182 idev->mc_qrv = MLD_QRV_DEFAULT;
1183 }
1184}
1185
1186static void mld_update_qi(struct inet6_dev *idev,
1187 const struct mld2_query *mlh2)
1188{
1189 /* RFC3810, relevant sections:
1190 * - 5.1.9. QQIC (Querier's Query Interval Code)
1191 * - 9.2. Query Interval
1192 * - 9.12. Older Version Querier Present Timeout
1193 * (the [Query Interval] in the last Query received)
1194 */
1195 unsigned long mc_qqi;
1196
1197 if (mlh2->mld2q_qqic < 128) {
1198 mc_qqi = mlh2->mld2q_qqic;
1199 } else {
1200 unsigned long mc_man, mc_exp;
1201
1202 mc_exp = MLDV2_QQIC_EXP(mlh2->mld2q_qqic);
1203 mc_man = MLDV2_QQIC_MAN(mlh2->mld2q_qqic);
1204
1205 mc_qqi = (mc_man | 0x10) << (mc_exp + 3);
1206 }
1207
1208 idev->mc_qi = mc_qqi * HZ;
1209}
1210
1211static void mld_update_qri(struct inet6_dev *idev,
1212 const struct mld2_query *mlh2)
1213{
1214 /* RFC3810, relevant sections:
1215 * - 5.1.3. Maximum Response Code
1216 * - 9.3. Query Response Interval
1217 */
e3f5b170 1218 idev->mc_qri = msecs_to_jiffies(mldv2_mrc(mlh2));
89225d1c
DB		 1219}
1220
2b7c121f
DB		 1221static int mld_process_v1(struct inet6_dev *idev, struct mld_msg *mld,
1222 unsigned long *max_delay)
1223{
1224 unsigned long mldv1_md;
1225
1226 /* Ignore v1 queries */
1227 if (mld_in_v2_mode_only(idev))
1228 return -EINVAL;
1229
1230 /* MLDv1 router present */
1231 mldv1_md = ntohs(mld->mld_maxdelay);
1232 *max_delay = max(msecs_to_jiffies(mldv1_md), 1UL);
1233
1234 mld_set_v1_mode(idev);
1235
1236 /* cancel MLDv2 report timer */
1237 idev->mc_gq_running = 0;
1238 if (del_timer(&idev->mc_gq_timer))
1239 __in6_dev_put(idev);
1240
1241 /* cancel the interface change timer */
1242 idev->mc_ifc_count = 0;
1243 if (del_timer(&idev->mc_ifc_timer))
1244 __in6_dev_put(idev);
1245
1246 /* clear deleted report items */
1247 mld_clear_delrec(idev);
1248
1249 return 0;
1250}
1251
1252static int mld_process_v2(struct inet6_dev *idev, struct mld2_query *mld,
1253 unsigned long *max_delay)
1254{
1255 /* hosts need to stay in MLDv1 mode, discard MLDv2 queries */
1256 if (mld_in_v1_mode(idev))
1257 return -EINVAL;
1258
1259 *max_delay = max(msecs_to_jiffies(mldv2_mrc(mld)), 1UL);
1260
1261 mld_update_qrv(idev, mld);
1262 mld_update_qi(idev, mld);
1263 mld_update_qri(idev, mld);
1264
1265 idev->mc_maxdelay = *max_delay;
1266
1267 return 0;
1268}
1269
96b52e61 1270/* called with rcu_read_lock() */
1da177e4
LT		 1271int igmp6_event_query(struct sk_buff *skb)
1272{
97300b5f 1273 struct mld2_query *mlh2 = NULL;
1da177e4 1274 struct ifmcaddr6 *ma;
b71d1d42 1275 const struct in6_addr *group;
1da177e4
LT		 1276 unsigned long max_delay;
1277 struct inet6_dev *idev;
6e7cb837 1278 struct mld_msg *mld;
1da177e4
LT		 1279 int group_type;
1280 int mark = 0;
2b7c121f 1281 int len, err;
1da177e4
LT		 1282
1283 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1284 return -EINVAL;
1285
1286 /* compute payload length excluding extension headers */
0660e03f 1287 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
cfe1fc77 1288 len -= skb_network_header_len(skb);
1da177e4
LT		 1289
1290 /* Drop queries with not link local source */
0660e03f 1291 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
1da177e4
LT		 1292 return -EINVAL;
1293
96b52e61 1294 idev = __in6_dev_get(skb->dev);
1da177e4
LT		 1295 if (idev == NULL)
1296 return 0;
1297
6e7cb837
YH		 1298 mld = (struct mld_msg *)icmp6_hdr(skb);
1299 group = &mld->mld_mca;
1da177e4
LT		 1300 group_type = ipv6_addr_type(group);
1301
1302 if (group_type != IPV6_ADDR_ANY &&
96b52e61 1303 !(group_type&IPV6_ADDR_MULTICAST))
1da177e4 1304 return -EINVAL;
1da177e4 1305
9fd07841 1306 if (len == MLD_V1_QUERY_LEN) {
2b7c121f
DB		 1307 err = mld_process_v1(idev, mld, &max_delay);
1308 if (err < 0)
1309 return err;
9fd07841 1310 } else if (len >= MLD_V2_QUERY_LEN_MIN) {
1ab1457c 1311 int srcs_offset = sizeof(struct mld2_query) -
97300b5f 1312 sizeof(struct icmp6hdr);
89225d1c 1313
96b52e61 1314 if (!pskb_may_pull(skb, srcs_offset))
97300b5f 1315 return -EINVAL;
96b52e61 1316
9c70220b 1317 mlh2 = (struct mld2_query *)skb_transport_header(skb);
84698963 1318
2b7c121f
DB		 1319 err = mld_process_v2(idev, mlh2, &max_delay);
1320 if (err < 0)
1321 return err;
89225d1c 1322
1da177e4 1323 if (group_type == IPV6_ADDR_ANY) { /* general query */
96b52e61 1324 if (mlh2->mld2q_nsrcs)
1da177e4 1325 return -EINVAL; /* no sources allowed */
96b52e61 1326
1da177e4 1327 mld_gq_start_timer(idev);
1da177e4
LT		 1328 return 0;
1329 }
1330 /* mark sources to include, if group & source-specific */
6e7cb837 1331 if (mlh2->mld2q_nsrcs != 0) {
1ab1457c 1332 if (!pskb_may_pull(skb, srcs_offset +
96b52e61 1333 ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr)))
97300b5f 1334 return -EINVAL;
96b52e61 1335
9c70220b 1336 mlh2 = (struct mld2_query *)skb_transport_header(skb);
97300b5f
YZ		 1337 mark = 1;
1338 }
96b52e61 1339 } else
1da177e4 1340 return -EINVAL;
1da177e4
LT		 1341
1342 read_lock_bh(&idev->lock);
1343 if (group_type == IPV6_ADDR_ANY) {
1344 for (ma = idev->mc_list; ma; ma=ma->next) {
1345 spin_lock_bh(&ma->mca_lock);
1346 igmp6_group_queried(ma, max_delay);
1347 spin_unlock_bh(&ma->mca_lock);
1348 }
1349 } else {
1350 for (ma = idev->mc_list; ma; ma=ma->next) {
7add2a43 1351 if (!ipv6_addr_equal(group, &ma->mca_addr))
1da177e4
LT		 1352 continue;
1353 spin_lock_bh(&ma->mca_lock);
1354 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1355 /* gsquery <- gsquery && mark */
1356 if (!mark)
1357 ma->mca_flags &= ~MAF_GSQUERY;
1358 } else {
1359 /* gsquery <- mark */
1360 if (mark)
1361 ma->mca_flags |= MAF_GSQUERY;
1362 else
1363 ma->mca_flags &= ~MAF_GSQUERY;
1364 }
5ab4a6c8 1365 if (!(ma->mca_flags & MAF_GSQUERY) ||
6e7cb837 1366 mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs))
5ab4a6c8 1367 igmp6_group_queried(ma, max_delay);
1da177e4 1368 spin_unlock_bh(&ma->mca_lock);
7add2a43 1369 break;
1da177e4
LT		 1370 }
1371 }
1372 read_unlock_bh(&idev->lock);
1da177e4
LT		 1373
1374 return 0;
1375}
1376
96b52e61 1377/* called with rcu_read_lock() */
1da177e4
LT		 1378int igmp6_event_report(struct sk_buff *skb)
1379{
1380 struct ifmcaddr6 *ma;
1da177e4 1381 struct inet6_dev *idev;
6e7cb837 1382 struct mld_msg *mld;
1da177e4
LT		 1383 int addr_type;
1384
1385 /* Our own report looped back. Ignore it. */
1386 if (skb->pkt_type == PACKET_LOOPBACK)
1387 return 0;
1388
24c69275
DS		 1389 /* send our report if the MC router may not have heard this report */
1390 if (skb->pkt_type != PACKET_MULTICAST &&
1391 skb->pkt_type != PACKET_BROADCAST)
1392 return 0;
1393
6e7cb837 1394 if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr)))
1da177e4
LT		 1395 return -EINVAL;
1396
6e7cb837 1397 mld = (struct mld_msg *)icmp6_hdr(skb);
1da177e4
LT		 1398
1399 /* Drop reports with not link local source */
0660e03f 1400 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
1ab1457c 1401 if (addr_type != IPV6_ADDR_ANY &&
1da177e4
LT		 1402 !(addr_type&IPV6_ADDR_LINKLOCAL))
1403 return -EINVAL;
1404
96b52e61 1405 idev = __in6_dev_get(skb->dev);
1da177e4
LT		 1406 if (idev == NULL)
1407 return -ENODEV;
1408
1409 /*
1410 * Cancel the timer for this group
1411 */
1412
1413 read_lock_bh(&idev->lock);
1414 for (ma = idev->mc_list; ma; ma=ma->next) {
6e7cb837 1415 if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) {
1da177e4
LT		 1416 spin_lock(&ma->mca_lock);
1417 if (del_timer(&ma->mca_timer))
1418 atomic_dec(&ma->mca_refcnt);
1419 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1420 spin_unlock(&ma->mca_lock);
1421 break;
1422 }
1423 }
1424 read_unlock_bh(&idev->lock);
1da177e4
LT		 1425 return 0;
1426}
1427
a50feda5
ED		 1428static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1429 int gdeleted, int sdeleted)
1da177e4
LT		 1430{
1431 switch (type) {
1432 case MLD2_MODE_IS_INCLUDE:
1433 case MLD2_MODE_IS_EXCLUDE:
1434 if (gdeleted || sdeleted)
a50feda5 1435 return false;
5ab4a6c8
DS		 1436 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1437 if (pmc->mca_sfmode == MCAST_INCLUDE)
a50feda5 1438 return true;
5ab4a6c8
DS		 1439 /* don't include if this source is excluded
1440 * in all filters
1441 */
1442 if (psf->sf_count[MCAST_INCLUDE])
7add2a43 1443 return type == MLD2_MODE_IS_INCLUDE;
5ab4a6c8
DS		 1444 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1445 psf->sf_count[MCAST_EXCLUDE];
1446 }
a50feda5 1447 return false;
1da177e4
LT		 1448 case MLD2_CHANGE_TO_INCLUDE:
1449 if (gdeleted || sdeleted)
a50feda5 1450 return false;
1da177e4
LT		 1451 return psf->sf_count[MCAST_INCLUDE] != 0;
1452 case MLD2_CHANGE_TO_EXCLUDE:
1453 if (gdeleted || sdeleted)
a50feda5 1454 return false;
1da177e4
LT		 1455 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1456 psf->sf_count[MCAST_INCLUDE])
a50feda5 1457 return false;
1da177e4
LT		 1458 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1459 psf->sf_count[MCAST_EXCLUDE];
1460 case MLD2_ALLOW_NEW_SOURCES:
1461 if (gdeleted || !psf->sf_crcount)
a50feda5 1462 return false;
1da177e4
LT		 1463 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1464 case MLD2_BLOCK_OLD_SOURCES:
1465 if (pmc->mca_sfmode == MCAST_INCLUDE)
1466 return gdeleted || (psf->sf_crcount && sdeleted);
1467 return psf->sf_crcount && !gdeleted && !sdeleted;
1468 }
a50feda5 1469 return false;
1da177e4
LT		 1470}
1471
1472static int
1473mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1474{
1475 struct ip6_sf_list *psf;
1476 int scount = 0;
1477
1478 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1479 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1480 continue;
1481 scount++;
1482 }
1483 return scount;
1484}
1485
2576f17d
YH		 1486static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb,
1487 struct net_device *dev,
1488 const struct in6_addr *saddr,
1489 const struct in6_addr *daddr,
1490 int proto, int len)
1491{
1492 struct ipv6hdr *hdr;
1493
1494 skb->protocol = htons(ETH_P_IPV6);
1495 skb->dev = dev;
1496
1497 skb_reset_network_header(skb);
1498 skb_put(skb, sizeof(struct ipv6hdr));
1499 hdr = ipv6_hdr(skb);
1500
1501 ip6_flow_hdr(hdr, 0, 0);
1502
1503 hdr->payload_len = htons(len);
1504 hdr->nexthdr = proto;
1505 hdr->hop_limit = inet6_sk(sk)->hop_limit;
1506
1507 hdr->saddr = *saddr;
1508 hdr->daddr = *daddr;
1509}
1510
8965779d 1511static struct sk_buff *mld_newpack(struct inet6_dev *idev, int size)
1da177e4 1512{
8965779d 1513 struct net_device *dev = idev->dev;
c346dca1 1514 struct net *net = dev_net(dev);
b8ad0cbc 1515 struct sock *sk = net->ipv6.igmp_sk;
1da177e4
LT		 1516 struct sk_buff *skb;
1517 struct mld2_report *pmr;
1518 struct in6_addr addr_buf;
d7aabf22 1519 const struct in6_addr *saddr;
a7ae1992
HX		 1520 int hlen = LL_RESERVED_SPACE(dev);
1521 int tlen = dev->needed_tailroom;
1da177e4
LT		 1522 int err;
1523 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1524 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1525 IPV6_TLV_PADN, 0 };
1526
1527 /* we assume size > sizeof(ra) here */
a7ae1992 1528 size += hlen + tlen;
72e09ad1
ED		 1529 /* limit our allocations to order-0 page */
1530 size = min_t(int, size, SKB_MAX_ORDER(0, 0));
1531 skb = sock_alloc_send_skb(sk, size, 1, &err);
1da177e4 1532
cfcabdcc 1533 if (!skb)
1da177e4
LT		 1534 return NULL;
1535
9d4a0314 1536 skb->priority = TC_PRIO_CONTROL;
a7ae1992 1537 skb_reserve(skb, hlen);
1da177e4 1538
8965779d 1539 if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) {
1da177e4 1540 /* <draft-ietf-magma-mld-source-05.txt>:
1ab1457c 1541 * use unspecified address as the source address
1da177e4
LT		 1542 * when a valid link-local address is not available.
1543 */
d7aabf22
YH		 1544 saddr = &in6addr_any;
1545 } else
1546 saddr = &addr_buf;
1da177e4 1547
2576f17d 1548 ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0);
1da177e4
LT		 1549
1550 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1551
27a884dc 1552 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
d10ba34b
ACM		 1553 skb_put(skb, sizeof(*pmr));
1554 pmr = (struct mld2_report *)skb_transport_header(skb);
6e7cb837
YH		 1555 pmr->mld2r_type = ICMPV6_MLD2_REPORT;
1556 pmr->mld2r_resv1 = 0;
1557 pmr->mld2r_cksum = 0;
1558 pmr->mld2r_resv2 = 0;
1559 pmr->mld2r_ngrec = 0;
1da177e4
LT		 1560 return skb;
1561}
1562
1563static void mld_sendpack(struct sk_buff *skb)
1564{
0660e03f 1565 struct ipv6hdr *pip6 = ipv6_hdr(skb);
9c70220b
ACM		 1566 struct mld2_report *pmr =
1567 (struct mld2_report *)skb_transport_header(skb);
1da177e4 1568 int payload_len, mldlen;
96b52e61 1569 struct inet6_dev *idev;
c346dca1 1570 struct net *net = dev_net(skb->dev);
1da177e4 1571 int err;
4c9483b2 1572 struct flowi6 fl6;
adf30907 1573 struct dst_entry *dst;
1da177e4 1574
96b52e61
ED		 1575 rcu_read_lock();
1576 idev = __in6_dev_get(skb->dev);
edf391ff
NH		 1577 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
1578
29a3cad5
SH		 1579 payload_len = (skb_tail_pointer(skb) - skb_network_header(skb)) -
1580 sizeof(*pip6);
1581 mldlen = skb_tail_pointer(skb) - skb_transport_header(skb);
1da177e4
LT		 1582 pip6->payload_len = htons(payload_len);
1583
6e7cb837
YH		 1584 pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1585 IPPROTO_ICMPV6,
1586 csum_partial(skb_transport_header(skb),
1587 mldlen, 0));
41927178 1588
4c9483b2 1589 icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT,
41927178
YH		 1590 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1591 skb->dev->ifindex);
12fd84f4 1592 dst = icmp6_dst_alloc(skb->dev, &fl6);
41927178 1593
452edd59
DM		 1594 err = 0;
1595 if (IS_ERR(dst)) {
1596 err = PTR_ERR(dst);
1597 dst = NULL;
1598 }
adf30907 1599 skb_dst_set(skb, dst);
41927178
YH		 1600 if (err)
1601 goto err_out;
1602
edf391ff
NH		 1603 payload_len = skb->len;
1604
b2e0b385 1605 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
41927178
YH		 1606 dst_output);
1607out:
1da177e4 1608 if (!err) {
5a57d4c7 1609 ICMP6MSGOUT_INC_STATS_BH(net, idev, ICMPV6_MLD2_REPORT);
e41b5368 1610 ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS);
edf391ff 1611 IP6_UPD_PO_STATS_BH(net, idev, IPSTATS_MIB_OUTMCAST, payload_len);
1da177e4 1612 } else
483a47d2 1613 IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_OUTDISCARDS);
1da177e4 1614
96b52e61 1615 rcu_read_unlock();
41927178
YH		 1616 return;
1617
1618err_out:
1619 kfree_skb(skb);
1620 goto out;
1da177e4
LT		 1621}
1622
1623static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1624{
fab10fe3 1625 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
1da177e4
LT		 1626}
1627
1628static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1629 int type, struct mld2_grec **ppgr)
1630{
1631 struct net_device *dev = pmc->idev->dev;
1632 struct mld2_report *pmr;
1633 struct mld2_grec *pgr;
1634
1635 if (!skb)
8965779d 1636 skb = mld_newpack(pmc->idev, dev->mtu);
1da177e4
LT		 1637 if (!skb)
1638 return NULL;
1639 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1640 pgr->grec_type = type;
1641 pgr->grec_auxwords = 0;
1642 pgr->grec_nsrcs = 0;
1643 pgr->grec_mca = pmc->mca_addr; /* structure copy */
9c70220b 1644 pmr = (struct mld2_report *)skb_transport_header(skb);
6e7cb837 1645 pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1);
1da177e4
LT		 1646 *ppgr = pgr;
1647 return skb;
1648}
1649
1650#define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1651 skb_tailroom(skb)) : 0)
1652
1653static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1654 int type, int gdeleted, int sdeleted)
1655{
8965779d
AW		 1656 struct inet6_dev *idev = pmc->idev;
1657 struct net_device *dev = idev->dev;
1da177e4
LT		 1658 struct mld2_report *pmr;
1659 struct mld2_grec *pgr = NULL;
1660 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
5ab4a6c8 1661 int scount, stotal, first, isquery, truncate;
1da177e4
LT		 1662
1663 if (pmc->mca_flags & MAF_NOREPORT)
1664 return skb;
1665
1666 isquery = type == MLD2_MODE_IS_INCLUDE ||
1667 type == MLD2_MODE_IS_EXCLUDE;
1668 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1669 type == MLD2_CHANGE_TO_EXCLUDE;
1670
5ab4a6c8
DS		 1671 stotal = scount = 0;
1672
1da177e4
LT		 1673 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1674
5ab4a6c8
DS		 1675 if (!*psf_list)
1676 goto empty_source;
1677
9c70220b 1678 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
1da177e4
LT		 1679
1680 /* EX and TO_EX get a fresh packet, if needed */
1681 if (truncate) {
6e7cb837 1682 if (pmr && pmr->mld2r_ngrec &&
1da177e4
LT		 1683 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1684 if (skb)
1685 mld_sendpack(skb);
8965779d 1686 skb = mld_newpack(idev, dev->mtu);
1da177e4
LT		 1687 }
1688 }
1689 first = 1;
1da177e4
LT		 1690 psf_prev = NULL;
1691 for (psf=*psf_list; psf; psf=psf_next) {
1692 struct in6_addr *psrc;
1693
1694 psf_next = psf->sf_next;
1695
1696 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1697 psf_prev = psf;
1698 continue;
1699 }
1700
1701 /* clear marks on query responses */
1702 if (isquery)
1703 psf->sf_gsresp = 0;
1704
1705 if (AVAILABLE(skb) < sizeof(*psrc) +
1706 first*sizeof(struct mld2_grec)) {
1707 if (truncate && !first)
1708 break; /* truncate these */
1709 if (pgr)
1710 pgr->grec_nsrcs = htons(scount);
1711 if (skb)
1712 mld_sendpack(skb);
8965779d 1713 skb = mld_newpack(idev, dev->mtu);
1da177e4
LT		 1714 first = 1;
1715 scount = 0;
1716 }
1717 if (first) {
1718 skb = add_grhead(skb, pmc, type, &pgr);
1719 first = 0;
1720 }
cc63f70b
AD		 1721 if (!skb)
1722 return NULL;
1da177e4
LT		 1723 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1724 *psrc = psf->sf_addr;
5ab4a6c8 1725 scount++; stotal++;
1da177e4
LT		 1726 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1727 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1728 psf->sf_crcount--;
1729 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1730 if (psf_prev)
1731 psf_prev->sf_next = psf->sf_next;
1732 else
1733 *psf_list = psf->sf_next;
1734 kfree(psf);
1735 continue;
1736 }
1737 }
1738 psf_prev = psf;
1739 }
5ab4a6c8
DS		 1740
1741empty_source:
1742 if (!stotal) {
1743 if (type == MLD2_ALLOW_NEW_SOURCES ||
1744 type == MLD2_BLOCK_OLD_SOURCES)
1745 return skb;
1746 if (pmc->mca_crcount || isquery) {
1747 /* make sure we have room for group header */
1748 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1749 mld_sendpack(skb);
1750 skb = NULL; /* add_grhead will get a new one */
1751 }
1752 skb = add_grhead(skb, pmc, type, &pgr);
1753 }
1754 }
1da177e4
LT		 1755 if (pgr)
1756 pgr->grec_nsrcs = htons(scount);
1757
1758 if (isquery)
1759 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1760 return skb;
1761}
1762
1763static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1764{
1765 struct sk_buff *skb = NULL;
1766 int type;
1767
8965779d 1768 read_lock_bh(&idev->lock);
1da177e4 1769 if (!pmc) {
1da177e4
LT		 1770 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1771 if (pmc->mca_flags & MAF_NOREPORT)
1772 continue;
1773 spin_lock_bh(&pmc->mca_lock);
1774 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1775 type = MLD2_MODE_IS_EXCLUDE;
1776 else
1777 type = MLD2_MODE_IS_INCLUDE;
1778 skb = add_grec(skb, pmc, type, 0, 0);
1779 spin_unlock_bh(&pmc->mca_lock);
1780 }
1da177e4
LT		 1781 } else {
1782 spin_lock_bh(&pmc->mca_lock);
1783 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1784 type = MLD2_MODE_IS_EXCLUDE;
1785 else
1786 type = MLD2_MODE_IS_INCLUDE;
1787 skb = add_grec(skb, pmc, type, 0, 0);
1788 spin_unlock_bh(&pmc->mca_lock);
1789 }
8965779d 1790 read_unlock_bh(&idev->lock);
1da177e4
LT		 1791 if (skb)
1792 mld_sendpack(skb);
1793}
1794
1795/*
1796 * remove zero-count source records from a source filter list
1797 */
1798static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1799{
1800 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1801
1802 psf_prev = NULL;
1803 for (psf=*ppsf; psf; psf = psf_next) {
1804 psf_next = psf->sf_next;
1805 if (psf->sf_crcount == 0) {
1806 if (psf_prev)
1807 psf_prev->sf_next = psf->sf_next;
1808 else
1809 *ppsf = psf->sf_next;
1810 kfree(psf);
1811 } else
1812 psf_prev = psf;
1813 }
1814}
1815
1816static void mld_send_cr(struct inet6_dev *idev)
1817{
1818 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1819 struct sk_buff *skb = NULL;
1820 int type, dtype;
1821
1822 read_lock_bh(&idev->lock);
6457d26b 1823 spin_lock(&idev->mc_lock);
1da177e4
LT		 1824
1825 /* deleted MCA's */
1826 pmc_prev = NULL;
1827 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1828 pmc_next = pmc->next;
1829 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1830 type = MLD2_BLOCK_OLD_SOURCES;
1831 dtype = MLD2_BLOCK_OLD_SOURCES;
1832 skb = add_grec(skb, pmc, type, 1, 0);
1833 skb = add_grec(skb, pmc, dtype, 1, 1);
1834 }
1835 if (pmc->mca_crcount) {
1da177e4
LT		 1836 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1837 type = MLD2_CHANGE_TO_INCLUDE;
1838 skb = add_grec(skb, pmc, type, 1, 0);
1839 }
5ab4a6c8 1840 pmc->mca_crcount--;
1da177e4
LT		 1841 if (pmc->mca_crcount == 0) {
1842 mld_clear_zeros(&pmc->mca_tomb);
1843 mld_clear_zeros(&pmc->mca_sources);
1844 }
1845 }
1846 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1847 !pmc->mca_sources) {
1848 if (pmc_prev)
1849 pmc_prev->next = pmc_next;
1850 else
1851 idev->mc_tomb = pmc_next;
1852 in6_dev_put(pmc->idev);
1853 kfree(pmc);
1854 } else
1855 pmc_prev = pmc;
1856 }
6457d26b 1857 spin_unlock(&idev->mc_lock);
1da177e4
LT		 1858
1859 /* change recs */
1860 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1861 spin_lock_bh(&pmc->mca_lock);
1862 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1863 type = MLD2_BLOCK_OLD_SOURCES;
1864 dtype = MLD2_ALLOW_NEW_SOURCES;
1865 } else {
1866 type = MLD2_ALLOW_NEW_SOURCES;
1867 dtype = MLD2_BLOCK_OLD_SOURCES;
1868 }
1869 skb = add_grec(skb, pmc, type, 0, 0);
1870 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1871
1872 /* filter mode changes */
1873 if (pmc->mca_crcount) {
1da177e4
LT		 1874 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1875 type = MLD2_CHANGE_TO_EXCLUDE;
1876 else
1877 type = MLD2_CHANGE_TO_INCLUDE;
1878 skb = add_grec(skb, pmc, type, 0, 0);
5ab4a6c8 1879 pmc->mca_crcount--;
1da177e4
LT		 1880 }
1881 spin_unlock_bh(&pmc->mca_lock);
1882 }
1883 read_unlock_bh(&idev->lock);
1884 if (!skb)
1885 return;
1886 (void) mld_sendpack(skb);
1887}
1888
1889static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1890{
c346dca1 1891 struct net *net = dev_net(dev);
b8ad0cbc 1892 struct sock *sk = net->ipv6.igmp_sk;
1da177e4 1893 struct inet6_dev *idev;
1ab1457c 1894 struct sk_buff *skb;
6e7cb837 1895 struct mld_msg *hdr;
d7aabf22 1896 const struct in6_addr *snd_addr, *saddr;
1da177e4 1897 struct in6_addr addr_buf;
a7ae1992
HX		 1898 int hlen = LL_RESERVED_SPACE(dev);
1899 int tlen = dev->needed_tailroom;
1da177e4
LT		 1900 int err, len, payload_len, full_len;
1901 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1902 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1903 IPV6_TLV_PADN, 0 };
4c9483b2 1904 struct flowi6 fl6;
adf30907 1905 struct dst_entry *dst;
1da177e4 1906
f3ee4010
YH		 1907 if (type == ICMPV6_MGM_REDUCTION)
1908 snd_addr = &in6addr_linklocal_allrouters;
1909 else
1910 snd_addr = addr;
1da177e4
LT		 1911
1912 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1913 payload_len = len + sizeof(ra);
1914 full_len = sizeof(struct ipv6hdr) + payload_len;
1915
edf391ff
NH		 1916 rcu_read_lock();
1917 IP6_UPD_PO_STATS(net, __in6_dev_get(dev),
1918 IPSTATS_MIB_OUT, full_len);
1919 rcu_read_unlock();
1920
a7ae1992 1921 skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err);
1da177e4
LT		 1922
1923 if (skb == NULL) {
a11d206d 1924 rcu_read_lock();
3bd653c8 1925 IP6_INC_STATS(net, __in6_dev_get(dev),
a11d206d
YH		 1926 IPSTATS_MIB_OUTDISCARDS);
1927 rcu_read_unlock();
1da177e4
LT		 1928 return;
1929 }
9d4a0314 1930 skb->priority = TC_PRIO_CONTROL;
a7ae1992 1931 skb_reserve(skb, hlen);
1da177e4 1932
95c385b4 1933 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1da177e4 1934 /* <draft-ietf-magma-mld-source-05.txt>:
1ab1457c 1935 * use unspecified address as the source address
1da177e4
LT		 1936 * when a valid link-local address is not available.
1937 */
d7aabf22
YH		 1938 saddr = &in6addr_any;
1939 } else
1940 saddr = &addr_buf;
1da177e4 1941
2576f17d 1942 ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len);
1da177e4
LT		 1943
1944 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1945
6e7cb837
YH		 1946 hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg));
1947 memset(hdr, 0, sizeof(struct mld_msg));
1948 hdr->mld_type = type;
4e3fd7a0 1949 hdr->mld_mca = *addr;
1da177e4 1950
6e7cb837
YH		 1951 hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len,
1952 IPPROTO_ICMPV6,
1953 csum_partial(hdr, len, 0));
1da177e4 1954
96b52e61
ED		 1955 rcu_read_lock();
1956 idev = __in6_dev_get(skb->dev);
1da177e4 1957
4c9483b2 1958 icmpv6_flow_init(sk, &fl6, type,
41927178
YH		 1959 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1960 skb->dev->ifindex);
12fd84f4 1961 dst = icmp6_dst_alloc(skb->dev, &fl6);
452edd59
DM		 1962 if (IS_ERR(dst)) {
1963 err = PTR_ERR(dst);
41927178 1964 goto err_out;
452edd59 1965 }
41927178 1966
adf30907 1967 skb_dst_set(skb, dst);
b2e0b385 1968 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
41927178
YH		 1969 dst_output);
1970out:
1da177e4 1971 if (!err) {
5c5d244b 1972 ICMP6MSGOUT_INC_STATS(net, idev, type);
a862f6a6 1973 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
edf391ff 1974 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len);
1da177e4 1975 } else
3bd653c8 1976 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
1da177e4 1977
96b52e61 1978 rcu_read_unlock();
1da177e4 1979 return;
41927178
YH		 1980
1981err_out:
1982 kfree_skb(skb);
1983 goto out;
1da177e4
LT		 1984}
1985
b173ee48
HFS		 1986static void mld_resend_report(struct inet6_dev *idev)
1987{
6c567b78 1988 if (mld_in_v1_mode(idev)) {
b173ee48
HFS		 1989 struct ifmcaddr6 *mcaddr;
1990 read_lock_bh(&idev->lock);
1991 for (mcaddr = idev->mc_list; mcaddr; mcaddr = mcaddr->next) {
1992 if (!(mcaddr->mca_flags & MAF_NOREPORT))
1993 igmp6_send(&mcaddr->mca_addr, idev->dev,
1994 ICMPV6_MGM_REPORT);
1995 }
1996 read_unlock_bh(&idev->lock);
1997 } else {
1998 mld_send_report(idev, NULL);
1999 }
2000}
2001
2002void ipv6_mc_dad_complete(struct inet6_dev *idev)
2003{
2004 idev->mc_dad_count = idev->mc_qrv;
2005 if (idev->mc_dad_count) {
2006 mld_resend_report(idev);
2007 idev->mc_dad_count--;
2008 if (idev->mc_dad_count)
2009 mld_dad_start_timer(idev, idev->mc_maxdelay);
2010 }
2011}
2012
2013static void mld_dad_timer_expire(unsigned long data)
2014{
2015 struct inet6_dev *idev = (struct inet6_dev *)data;
2016
2017 mld_resend_report(idev);
2018 if (idev->mc_dad_count) {
2019 idev->mc_dad_count--;
2020 if (idev->mc_dad_count)
2021 mld_dad_start_timer(idev, idev->mc_maxdelay);
2022 }
2023 __in6_dev_put(idev);
2024}
2025
1da177e4 2026static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
b71d1d42 2027 const struct in6_addr *psfsrc)
1da177e4
LT		 2028{
2029 struct ip6_sf_list *psf, *psf_prev;
2030 int rv = 0;
2031
2032 psf_prev = NULL;
2033 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
2034 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
2035 break;
2036 psf_prev = psf;
2037 }
2038 if (!psf || psf->sf_count[sfmode] == 0) {
2039 /* source filter not found, or count wrong => bug */
2040 return -ESRCH;
2041 }
2042 psf->sf_count[sfmode]--;
2043 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
2044 struct inet6_dev *idev = pmc->idev;
2045
2046 /* no more filters for this source */
2047 if (psf_prev)
2048 psf_prev->sf_next = psf->sf_next;
2049 else
2050 pmc->mca_sources = psf->sf_next;
2051 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
6c567b78 2052 !mld_in_v1_mode(idev)) {
1da177e4
LT		 2053 psf->sf_crcount = idev->mc_qrv;
2054 psf->sf_next = pmc->mca_tomb;
2055 pmc->mca_tomb = psf;
2056 rv = 1;
2057 } else
2058 kfree(psf);
2059 }
2060 return rv;
2061}
2062
b71d1d42
ED		 2063static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2064 int sfmode, int sfcount, const struct in6_addr *psfsrc,
1da177e4
LT		 2065 int delta)
2066{
2067 struct ifmcaddr6 *pmc;
2068 int changerec = 0;
2069 int i, err;
2070
2071 if (!idev)
2072 return -ENODEV;
2073 read_lock_bh(&idev->lock);
2074 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2075 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2076 break;
2077 }
2078 if (!pmc) {
2079 /* MCA not found?? bug */
2080 read_unlock_bh(&idev->lock);
2081 return -ESRCH;
2082 }
2083 spin_lock_bh(&pmc->mca_lock);
2084 sf_markstate(pmc);
2085 if (!delta) {
2086 if (!pmc->mca_sfcount[sfmode]) {
2087 spin_unlock_bh(&pmc->mca_lock);
2088 read_unlock_bh(&idev->lock);
2089 return -EINVAL;
2090 }
2091 pmc->mca_sfcount[sfmode]--;
2092 }
2093 err = 0;
2094 for (i=0; i<sfcount; i++) {
2095 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
2096
2097 changerec |= rv > 0;
2098 if (!err && rv < 0)
2099 err = rv;
2100 }
2101 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
2102 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
2103 pmc->mca_sfcount[MCAST_INCLUDE]) {
2104 struct ip6_sf_list *psf;
2105
2106 /* filter mode change */
2107 pmc->mca_sfmode = MCAST_INCLUDE;
2108 pmc->mca_crcount = idev->mc_qrv;
2109 idev->mc_ifc_count = pmc->mca_crcount;
2110 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2111 psf->sf_crcount = 0;
2112 mld_ifc_event(pmc->idev);
2113 } else if (sf_setstate(pmc) || changerec)
2114 mld_ifc_event(pmc->idev);
2115 spin_unlock_bh(&pmc->mca_lock);
2116 read_unlock_bh(&idev->lock);
2117 return err;
2118}
2119
2120/*
2121 * Add multicast single-source filter to the interface list
2122 */
2123static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
99d2f47a 2124 const struct in6_addr *psfsrc)
1da177e4
LT		 2125{
2126 struct ip6_sf_list *psf, *psf_prev;
2127
2128 psf_prev = NULL;
2129 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
2130 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
2131 break;
2132 psf_prev = psf;
2133 }
2134 if (!psf) {
0c600eda 2135 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
1da177e4
LT		 2136 if (!psf)
2137 return -ENOBUFS;
0c600eda 2138
1da177e4
LT		 2139 psf->sf_addr = *psfsrc;
2140 if (psf_prev) {
2141 psf_prev->sf_next = psf;
2142 } else
2143 pmc->mca_sources = psf;
2144 }
2145 psf->sf_count[sfmode]++;
2146 return 0;
2147}
2148
2149static void sf_markstate(struct ifmcaddr6 *pmc)
2150{
2151 struct ip6_sf_list *psf;
2152 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
2153
2154 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
2155 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
2156 psf->sf_oldin = mca_xcount ==
2157 psf->sf_count[MCAST_EXCLUDE] &&
2158 !psf->sf_count[MCAST_INCLUDE];
2159 } else
2160 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
2161}
2162
2163static int sf_setstate(struct ifmcaddr6 *pmc)
2164{
7add2a43 2165 struct ip6_sf_list *psf, *dpsf;
1da177e4
LT		 2166 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
2167 int qrv = pmc->idev->mc_qrv;
2168 int new_in, rv;
2169
2170 rv = 0;
2171 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
2172 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
2173 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
2174 !psf->sf_count[MCAST_INCLUDE];
2175 } else
2176 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
7add2a43
DS		 2177 if (new_in) {
2178 if (!psf->sf_oldin) {
e80e28b6 2179 struct ip6_sf_list *prev = NULL;
7add2a43
DS		 2180
2181 for (dpsf=pmc->mca_tomb; dpsf;
2182 dpsf=dpsf->sf_next) {
2183 if (ipv6_addr_equal(&dpsf->sf_addr,
2184 &psf->sf_addr))
2185 break;
2186 prev = dpsf;
2187 }
2188 if (dpsf) {
2189 if (prev)
2190 prev->sf_next = dpsf->sf_next;
2191 else
2192 pmc->mca_tomb = dpsf->sf_next;
2193 kfree(dpsf);
2194 }
2195 psf->sf_crcount = qrv;
2196 rv++;
2197 }
2198 } else if (psf->sf_oldin) {
2199 psf->sf_crcount = 0;
2200 /*
2201 * add or update "delete" records if an active filter
2202 * is now inactive
2203 */
2204 for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
2205 if (ipv6_addr_equal(&dpsf->sf_addr,
2206 &psf->sf_addr))
2207 break;
2208 if (!dpsf) {
5d55354f 2209 dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
7add2a43
DS		 2210 if (!dpsf)
2211 continue;
2212 *dpsf = *psf;
2213 /* pmc->mca_lock held by callers */
2214 dpsf->sf_next = pmc->mca_tomb;
2215 pmc->mca_tomb = dpsf;
2216 }
2217 dpsf->sf_crcount = qrv;
1da177e4
LT		 2218 rv++;
2219 }
2220 }
2221 return rv;
2222}
2223
2224/*
2225 * Add multicast source filter list to the interface list
2226 */
b71d1d42
ED		 2227static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2228 int sfmode, int sfcount, const struct in6_addr *psfsrc,
1da177e4
LT		 2229 int delta)
2230{
2231 struct ifmcaddr6 *pmc;
2232 int isexclude;
2233 int i, err;
2234
2235 if (!idev)
2236 return -ENODEV;
2237 read_lock_bh(&idev->lock);
2238 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2239 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2240 break;
2241 }
2242 if (!pmc) {
2243 /* MCA not found?? bug */
2244 read_unlock_bh(&idev->lock);
2245 return -ESRCH;
2246 }
2247 spin_lock_bh(&pmc->mca_lock);
2248
2249 sf_markstate(pmc);
2250 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2251 if (!delta)
2252 pmc->mca_sfcount[sfmode]++;
2253 err = 0;
2254 for (i=0; i<sfcount; i++) {
99d2f47a 2255 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]);
1da177e4
LT		 2256 if (err)
2257 break;
2258 }
2259 if (err) {
2260 int j;
2261
2262 if (!delta)
2263 pmc->mca_sfcount[sfmode]--;
2264 for (j=0; j<i; j++)
78d50217 2265 ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]);
1da177e4 2266 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
1da177e4
LT		 2267 struct ip6_sf_list *psf;
2268
2269 /* filter mode change */
2270 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2271 pmc->mca_sfmode = MCAST_EXCLUDE;
2272 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2273 pmc->mca_sfmode = MCAST_INCLUDE;
2274 /* else no filters; keep old mode for reports */
2275
2276 pmc->mca_crcount = idev->mc_qrv;
2277 idev->mc_ifc_count = pmc->mca_crcount;
2278 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2279 psf->sf_crcount = 0;
2280 mld_ifc_event(idev);
2281 } else if (sf_setstate(pmc))
2282 mld_ifc_event(idev);
2283 spin_unlock_bh(&pmc->mca_lock);
2284 read_unlock_bh(&idev->lock);
2285 return err;
2286}
2287
2288static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2289{
2290 struct ip6_sf_list *psf, *nextpsf;
2291
2292 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
2293 nextpsf = psf->sf_next;
2294 kfree(psf);
2295 }
2296 pmc->mca_tomb = NULL;
2297 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
2298 nextpsf = psf->sf_next;
2299 kfree(psf);
2300 }
2301 pmc->mca_sources = NULL;
2302 pmc->mca_sfmode = MCAST_EXCLUDE;
de9daad9 2303 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
1da177e4
LT		 2304 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2305}
2306
2307
2308static void igmp6_join_group(struct ifmcaddr6 *ma)
2309{
2310 unsigned long delay;
2311
2312 if (ma->mca_flags & MAF_NOREPORT)
2313 return;
2314
2315 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2316
fc4eba58 2317 delay = net_random() % unsolicited_report_interval(ma->idev);
1da177e4
LT		 2318
2319 spin_lock_bh(&ma->mca_lock);
2320 if (del_timer(&ma->mca_timer)) {
2321 atomic_dec(&ma->mca_refcnt);
2322 delay = ma->mca_timer.expires - jiffies;
2323 }
2324
2325 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2326 atomic_inc(&ma->mca_refcnt);
2327 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2328 spin_unlock_bh(&ma->mca_lock);
2329}
2330
2331static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2332 struct inet6_dev *idev)
2333{
2334 int err;
2335
5ab4a6c8
DS		 2336 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2337 * so no other readers or writers of iml or its sflist
2338 */
cfcabdcc 2339 if (!iml->sflist) {
1da177e4
LT		 2340 /* any-source empty exclude case */
2341 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2342 }
2343 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2344 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2345 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2346 iml->sflist = NULL;
2347 return err;
2348}
2349
2350static void igmp6_leave_group(struct ifmcaddr6 *ma)
2351{
6c567b78 2352 if (mld_in_v1_mode(ma->idev)) {
1da177e4
LT		 2353 if (ma->mca_flags & MAF_LAST_REPORTER)
2354 igmp6_send(&ma->mca_addr, ma->idev->dev,
2355 ICMPV6_MGM_REDUCTION);
2356 } else {
2357 mld_add_delrec(ma->idev, ma);
2358 mld_ifc_event(ma->idev);
2359 }
2360}
2361
2362static void mld_gq_timer_expire(unsigned long data)
2363{
2364 struct inet6_dev *idev = (struct inet6_dev *)data;
2365
2366 idev->mc_gq_running = 0;
2367 mld_send_report(idev, NULL);
2368 __in6_dev_put(idev);
2369}
2370
2371static void mld_ifc_timer_expire(unsigned long data)
2372{
2373 struct inet6_dev *idev = (struct inet6_dev *)data;
2374
2375 mld_send_cr(idev);
2376 if (idev->mc_ifc_count) {
2377 idev->mc_ifc_count--;
2378 if (idev->mc_ifc_count)
2379 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2380 }
2381 __in6_dev_put(idev);
2382}
2383
2384static void mld_ifc_event(struct inet6_dev *idev)
2385{
6c567b78 2386 if (mld_in_v1_mode(idev))
1da177e4
LT		 2387 return;
2388 idev->mc_ifc_count = idev->mc_qrv;
2389 mld_ifc_start_timer(idev, 1);
2390}
2391
2392
2393static void igmp6_timer_handler(unsigned long data)
2394{
2395 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2396
6c567b78 2397 if (mld_in_v1_mode(ma->idev))
1da177e4
LT		 2398 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2399 else
2400 mld_send_report(ma->idev, ma);
2401
2402 spin_lock(&ma->mca_lock);
2403 ma->mca_flags |= MAF_LAST_REPORTER;
2404 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2405 spin_unlock(&ma->mca_lock);
2406 ma_put(ma);
2407}
2408
75c78500
MS		 2409/* Device changing type */
2410
2411void ipv6_mc_unmap(struct inet6_dev *idev)
2412{
2413 struct ifmcaddr6 *i;
2414
2415 /* Install multicast list, except for all-nodes (already installed) */
2416
2417 read_lock_bh(&idev->lock);
2418 for (i = idev->mc_list; i; i = i->next)
2419 igmp6_group_dropped(i);
2420 read_unlock_bh(&idev->lock);
2421}
2422
2423void ipv6_mc_remap(struct inet6_dev *idev)
2424{
2425 ipv6_mc_up(idev);
2426}
2427
1da177e4
LT		 2428/* Device going down */
2429
2430void ipv6_mc_down(struct inet6_dev *idev)
2431{
2432 struct ifmcaddr6 *i;
2433
2434 /* Withdraw multicast list */
2435
2436 read_lock_bh(&idev->lock);
2437 idev->mc_ifc_count = 0;
2438 if (del_timer(&idev->mc_ifc_timer))
2439 __in6_dev_put(idev);
2440 idev->mc_gq_running = 0;
2441 if (del_timer(&idev->mc_gq_timer))
2442 __in6_dev_put(idev);
b173ee48
HFS		 2443 if (del_timer(&idev->mc_dad_timer))
2444 __in6_dev_put(idev);
1da177e4
LT		 2445
2446 for (i = idev->mc_list; i; i=i->next)
2447 igmp6_group_dropped(i);
2448 read_unlock_bh(&idev->lock);
2449
2450 mld_clear_delrec(idev);
2451}
2452
2453
2454/* Device going up */
2455
2456void ipv6_mc_up(struct inet6_dev *idev)
2457{
2458 struct ifmcaddr6 *i;
2459
2460 /* Install multicast list, except for all-nodes (already installed) */
2461
2462 read_lock_bh(&idev->lock);
2463 for (i = idev->mc_list; i; i=i->next)
2464 igmp6_group_added(i);
2465 read_unlock_bh(&idev->lock);
2466}
2467
2468/* IPv6 device initialization. */
2469
2470void ipv6_mc_init_dev(struct inet6_dev *idev)
2471{
1da177e4 2472 write_lock_bh(&idev->lock);
6457d26b 2473 spin_lock_init(&idev->mc_lock);
1da177e4 2474 idev->mc_gq_running = 0;
b24b8a24
PE		 2475 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2476 (unsigned long)idev);
1da177e4
LT		 2477 idev->mc_tomb = NULL;
2478 idev->mc_ifc_count = 0;
b24b8a24
PE		 2479 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2480 (unsigned long)idev);
b173ee48
HFS		 2481 setup_timer(&idev->mc_dad_timer, mld_dad_timer_expire,
2482 (unsigned long)idev);
89225d1c 2483
1da177e4 2484 idev->mc_qrv = MLD_QRV_DEFAULT;
89225d1c
DB		 2485 idev->mc_qi = MLD_QI_DEFAULT;
2486 idev->mc_qri = MLD_QRI_DEFAULT;
2487
fc4eba58 2488 idev->mc_maxdelay = unsolicited_report_interval(idev);
1da177e4
LT		 2489 idev->mc_v1_seen = 0;
2490 write_unlock_bh(&idev->lock);
1da177e4
LT		 2491}
2492
2493/*
2494 * Device is about to be destroyed: clean up.
2495 */
2496
2497void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2498{
2499 struct ifmcaddr6 *i;
1da177e4
LT		 2500
2501 /* Deactivate timers */
2502 ipv6_mc_down(idev);
2503
2504 /* Delete all-nodes address. */
1da177e4
LT		 2505 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2506 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2507 * fail.
2508 */
f3ee4010 2509 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes);
1da177e4 2510
f3ee4010
YH		 2511 if (idev->cnf.forwarding)
2512 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters);
1da177e4
LT		 2513
2514 write_lock_bh(&idev->lock);
2515 while ((i = idev->mc_list) != NULL) {
2516 idev->mc_list = i->next;
2517 write_unlock_bh(&idev->lock);
2518
2519 igmp6_group_dropped(i);
2520 ma_put(i);
2521
2522 write_lock_bh(&idev->lock);
2523 }
2524 write_unlock_bh(&idev->lock);
2525}
2526
2527#ifdef CONFIG_PROC_FS
2528struct igmp6_mc_iter_state {
b8ad0cbc 2529 struct seq_net_private p;
1da177e4
LT		 2530 struct net_device *dev;
2531 struct inet6_dev *idev;
2532};
2533
2534#define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2535
2536static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2537{
2538 struct ifmcaddr6 *im = NULL;
2539 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
1218854a 2540 struct net *net = seq_file_net(seq);
1da177e4 2541
7562f876 2542 state->idev = NULL;
ce81b76a 2543 for_each_netdev_rcu(net, state->dev) {
1da177e4 2544 struct inet6_dev *idev;
ce81b76a 2545 idev = __in6_dev_get(state->dev);
1da177e4
LT		 2546 if (!idev)
2547 continue;
2548 read_lock_bh(&idev->lock);
2549 im = idev->mc_list;
2550 if (im) {
2551 state->idev = idev;
2552 break;
2553 }
2554 read_unlock_bh(&idev->lock);
1da177e4
LT		 2555 }
2556 return im;
2557}
2558
2559static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2560{
2561 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2562
2563 im = im->next;
2564 while (!im) {
ce81b76a 2565 if (likely(state->idev != NULL))
1da177e4 2566 read_unlock_bh(&state->idev->lock);
ce81b76a
ED		 2567
2568 state->dev = next_net_device_rcu(state->dev);
1da177e4
LT		 2569 if (!state->dev) {
2570 state->idev = NULL;
2571 break;
2572 }
ce81b76a 2573 state->idev = __in6_dev_get(state->dev);
1da177e4
LT		 2574 if (!state->idev)
2575 continue;
2576 read_lock_bh(&state->idev->lock);
2577 im = state->idev->mc_list;
2578 }
2579 return im;
2580}
2581
2582static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2583{
2584 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2585 if (im)
2586 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2587 --pos;
2588 return pos ? NULL : im;
2589}
2590
2591static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
ce81b76a 2592 __acquires(RCU)
1da177e4 2593{
ce81b76a 2594 rcu_read_lock();
1da177e4
LT		 2595 return igmp6_mc_get_idx(seq, *pos);
2596}
2597
2598static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2599{
ce81b76a
ED		 2600 struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v);
2601
1da177e4
LT		 2602 ++*pos;
2603 return im;
2604}
2605
2606static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
ce81b76a 2607 __releases(RCU)
1da177e4
LT		 2608{
2609 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
ce81b76a 2610
1da177e4
LT		 2611 if (likely(state->idev != NULL)) {
2612 read_unlock_bh(&state->idev->lock);
1da177e4
LT		 2613 state->idev = NULL;
2614 }
2615 state->dev = NULL;
ce81b76a 2616 rcu_read_unlock();
1da177e4
LT		 2617}
2618
2619static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2620{
2621 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2622 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2623
2624 seq_printf(seq,
4b7a4274 2625 "%-4d %-15s %pi6 %5d %08X %ld\n",
1da177e4 2626 state->dev->ifindex, state->dev->name,
b071195d 2627 &im->mca_addr,
1da177e4
LT		 2628 im->mca_users, im->mca_flags,
2629 (im->mca_flags&MAF_TIMER_RUNNING) ?
2630 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2631 return 0;
2632}
2633
56b3d975 2634static const struct seq_operations igmp6_mc_seq_ops = {
1da177e4
LT		 2635 .start = igmp6_mc_seq_start,
2636 .next = igmp6_mc_seq_next,
2637 .stop = igmp6_mc_seq_stop,
2638 .show = igmp6_mc_seq_show,
2639};
2640
2641static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2642{
b8ad0cbc
DL		 2643 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2644 sizeof(struct igmp6_mc_iter_state));
1da177e4
LT		 2645}
2646
9a32144e 2647static const struct file_operations igmp6_mc_seq_fops = {
1da177e4
LT		 2648 .owner = THIS_MODULE,
2649 .open = igmp6_mc_seq_open,
2650 .read = seq_read,
2651 .llseek = seq_lseek,
b8ad0cbc 2652 .release = seq_release_net,
1da177e4
LT		 2653};
2654
2655struct igmp6_mcf_iter_state {
b8ad0cbc 2656 struct seq_net_private p;
1da177e4
LT		 2657 struct net_device *dev;
2658 struct inet6_dev *idev;
2659 struct ifmcaddr6 *im;
2660};
2661
2662#define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2663
2664static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2665{
2666 struct ip6_sf_list *psf = NULL;
2667 struct ifmcaddr6 *im = NULL;
2668 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
1218854a 2669 struct net *net = seq_file_net(seq);
1da177e4 2670
7562f876
PE		 2671 state->idev = NULL;
2672 state->im = NULL;
ce81b76a 2673 for_each_netdev_rcu(net, state->dev) {
1da177e4 2674 struct inet6_dev *idev;
ce81b76a 2675 idev = __in6_dev_get(state->dev);
1da177e4
LT		 2676 if (unlikely(idev == NULL))
2677 continue;
2678 read_lock_bh(&idev->lock);
2679 im = idev->mc_list;
2680 if (likely(im != NULL)) {
2681 spin_lock_bh(&im->mca_lock);
2682 psf = im->mca_sources;
2683 if (likely(psf != NULL)) {
2684 state->im = im;
2685 state->idev = idev;
2686 break;
2687 }
2688 spin_unlock_bh(&im->mca_lock);
2689 }
2690 read_unlock_bh(&idev->lock);
1da177e4
LT		 2691 }
2692 return psf;
2693}
2694
2695static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2696{
2697 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2698
2699 psf = psf->sf_next;
2700 while (!psf) {
2701 spin_unlock_bh(&state->im->mca_lock);
2702 state->im = state->im->next;
2703 while (!state->im) {
ce81b76a 2704 if (likely(state->idev != NULL))
1da177e4 2705 read_unlock_bh(&state->idev->lock);
ce81b76a
ED		 2706
2707 state->dev = next_net_device_rcu(state->dev);
1da177e4
LT		 2708 if (!state->dev) {
2709 state->idev = NULL;
2710 goto out;
2711 }
ce81b76a 2712 state->idev = __in6_dev_get(state->dev);
1da177e4
LT		 2713 if (!state->idev)
2714 continue;
2715 read_lock_bh(&state->idev->lock);
2716 state->im = state->idev->mc_list;
2717 }
2718 if (!state->im)
2719 break;
2720 spin_lock_bh(&state->im->mca_lock);
2721 psf = state->im->mca_sources;
2722 }
2723out:
2724 return psf;
2725}
2726
2727static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2728{
2729 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2730 if (psf)
2731 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2732 --pos;
2733 return pos ? NULL : psf;
2734}
2735
2736static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
ce81b76a 2737 __acquires(RCU)
1da177e4 2738{
ce81b76a 2739 rcu_read_lock();
1da177e4
LT		 2740 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2741}
2742
2743static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2744{
2745 struct ip6_sf_list *psf;
2746 if (v == SEQ_START_TOKEN)
2747 psf = igmp6_mcf_get_first(seq);
2748 else
2749 psf = igmp6_mcf_get_next(seq, v);
2750 ++*pos;
2751 return psf;
2752}
2753
2754static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
ce81b76a 2755 __releases(RCU)
1da177e4
LT		 2756{
2757 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2758 if (likely(state->im != NULL)) {
2759 spin_unlock_bh(&state->im->mca_lock);
2760 state->im = NULL;
2761 }
2762 if (likely(state->idev != NULL)) {
2763 read_unlock_bh(&state->idev->lock);
1da177e4
LT		 2764 state->idev = NULL;
2765 }
2766 state->dev = NULL;
ce81b76a 2767 rcu_read_unlock();
1da177e4
LT		 2768}
2769
2770static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2771{
2772 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2773 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2774
2775 if (v == SEQ_START_TOKEN) {
1ab1457c 2776 seq_printf(seq,
1da177e4 2777 "%3s %6s "
9343e79a 2778 "%32s %32s %6s %6s\n", "Idx",
1da177e4
LT		 2779 "Device", "Multicast Address",
2780 "Source Address", "INC", "EXC");
2781 } else {
2782 seq_printf(seq,
4b7a4274 2783 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
1da177e4 2784 state->dev->ifindex, state->dev->name,
b071195d
HH		 2785 &state->im->mca_addr,
2786 &psf->sf_addr,
1da177e4
LT		 2787 psf->sf_count[MCAST_INCLUDE],
2788 psf->sf_count[MCAST_EXCLUDE]);
2789 }
2790 return 0;
2791}
2792
56b3d975 2793static const struct seq_operations igmp6_mcf_seq_ops = {
1da177e4
LT		 2794 .start = igmp6_mcf_seq_start,
2795 .next = igmp6_mcf_seq_next,
2796 .stop = igmp6_mcf_seq_stop,
2797 .show = igmp6_mcf_seq_show,
2798};
2799
2800static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2801{
b8ad0cbc
DL		 2802 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2803 sizeof(struct igmp6_mcf_iter_state));
1da177e4
LT		 2804}
2805
9a32144e 2806static const struct file_operations igmp6_mcf_seq_fops = {
1da177e4
LT		 2807 .owner = THIS_MODULE,
2808 .open = igmp6_mcf_seq_open,
2809 .read = seq_read,
2810 .llseek = seq_lseek,
b8ad0cbc 2811 .release = seq_release_net,
1da177e4 2812};
ea82edf7 2813
2c8c1e72 2814static int __net_init igmp6_proc_init(struct net *net)
ea82edf7
DL		 2815{
2816 int err;
2817
2818 err = -ENOMEM;
d4beaa66 2819 if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops))
ea82edf7 2820 goto out;
d4beaa66
G		 2821 if (!proc_create("mcfilter6", S_IRUGO, net->proc_net,
2822 &igmp6_mcf_seq_fops))
ea82edf7
DL		 2823 goto out_proc_net_igmp6;
2824
2825 err = 0;
2826out:
2827 return err;
2828
2829out_proc_net_igmp6:
ece31ffd 2830 remove_proc_entry("igmp6", net->proc_net);
ea82edf7
DL		 2831 goto out;
2832}
2833
2c8c1e72 2834static void __net_exit igmp6_proc_exit(struct net *net)
ea82edf7 2835{
ece31ffd
G		 2836 remove_proc_entry("mcfilter6", net->proc_net);
2837 remove_proc_entry("igmp6", net->proc_net);
ea82edf7
DL		 2838}
2839#else
2c8c1e72 2840static inline int igmp6_proc_init(struct net *net)
ea82edf7
DL		 2841{
2842 return 0;
2843}
2c8c1e72 2844static inline void igmp6_proc_exit(struct net *net)
ea82edf7 2845{
ea82edf7 2846}
1da177e4
LT		 2847#endif
2848
2c8c1e72 2849static int __net_init igmp6_net_init(struct net *net)
1da177e4 2850{
1da177e4
LT		 2851 int err;
2852
1ed8516f
DL		 2853 err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
2854 SOCK_RAW, IPPROTO_ICMPV6, net);
1da177e4 2855 if (err < 0) {
f3213831 2856 pr_err("Failed to initialize the IGMP6 control socket (err %d)\n",
1da177e4 2857 err);
b8ad0cbc 2858 goto out;
1da177e4
LT		 2859 }
2860
1ed8516f 2861 inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
1da177e4 2862
ea82edf7
DL		 2863 err = igmp6_proc_init(net);
2864 if (err)
b8ad0cbc 2865 goto out_sock_create;
b8ad0cbc
DL		 2866out:
2867 return err;
2868
2869out_sock_create:
1ed8516f 2870 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
b8ad0cbc 2871 goto out;
1da177e4
LT		 2872}
2873
2c8c1e72 2874static void __net_exit igmp6_net_exit(struct net *net)
1da177e4 2875{
1ed8516f 2876 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
ea82edf7 2877 igmp6_proc_exit(net);
1da177e4 2878}
b8ad0cbc
DL		 2879
2880static struct pernet_operations igmp6_net_ops = {
2881 .init = igmp6_net_init,
2882 .exit = igmp6_net_exit,
2883};
2884
2885int __init igmp6_init(void)
2886{
2887 return register_pernet_subsys(&igmp6_net_ops);
2888}
2889
2890void igmp6_cleanup(void)
2891{
2892 unregister_pernet_subsys(&igmp6_net_ops);
2893}
Ubuntu Eoan Linux kernel mirror