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Merge tag 'v3.10.95' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.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>
6e7cb837 47#include <net/mld.h>
1da177e4
LT		 48
49#include <linux/netfilter.h>
50#include <linux/netfilter_ipv6.h>
51
457c4cbc 52#include <net/net_namespace.h>
1da177e4
LT		 53#include <net/sock.h>
54#include <net/snmp.h>
55
56#include <net/ipv6.h>
57#include <net/protocol.h>
58#include <net/if_inet6.h>
59#include <net/ndisc.h>
60#include <net/addrconf.h>
61#include <net/ip6_route.h>
1ed8516f 62#include <net/inet_common.h>
1da177e4
LT		 63
64#include <net/ip6_checksum.h>
65
66/* Set to 3 to get tracing... */
67#define MCAST_DEBUG 2
68
69#if MCAST_DEBUG >= 3
70#define MDBG(x) printk x
71#else
72#define MDBG(x)
73#endif
74
6e7cb837
YH		 75/* Ensure that we have struct in6_addr aligned on 32bit word. */
76static void *__mld2_query_bugs[] __attribute__((__unused__)) = {
77 BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4),
78 BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4),
79 BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4)
1da177e4
LT		 80};
81
82static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
83
84/* Big mc list lock for all the sockets */
456b61bc 85static DEFINE_SPINLOCK(ipv6_sk_mc_lock);
1da177e4 86
1da177e4
LT		 87static void igmp6_join_group(struct ifmcaddr6 *ma);
88static void igmp6_leave_group(struct ifmcaddr6 *ma);
89static void igmp6_timer_handler(unsigned long data);
90
91static void mld_gq_timer_expire(unsigned long data);
92static void mld_ifc_timer_expire(unsigned long data);
93static void mld_ifc_event(struct inet6_dev *idev);
94static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
b71d1d42 95static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr);
1da177e4
LT		 96static void mld_clear_delrec(struct inet6_dev *idev);
97static int sf_setstate(struct ifmcaddr6 *pmc);
98static void sf_markstate(struct ifmcaddr6 *pmc);
99static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
b71d1d42
ED		 100static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
101 int sfmode, int sfcount, const struct in6_addr *psfsrc,
1da177e4 102 int delta);
b71d1d42
ED		 103static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
104 int sfmode, int sfcount, const struct in6_addr *psfsrc,
1da177e4
LT		 105 int delta);
106static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
107 struct inet6_dev *idev);
108
109
110#define IGMP6_UNSOLICITED_IVAL (10*HZ)
111#define MLD_QRV_DEFAULT 2
112
53b7997f 113#define MLD_V1_SEEN(idev) (dev_net((idev)->dev)->ipv6.devconf_all->force_mld_version == 1 || \
1da177e4
LT		 114 (idev)->cnf.force_mld_version == 1 || \
115 ((idev)->mc_v1_seen && \
116 time_before(jiffies, (idev)->mc_v1_seen)))
117
6f4353d8 118#define IPV6_MLD_MAX_MSF 64
1da177e4 119
ab32ea5d 120int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
1da177e4
LT		 121
122/*
123 * socket join on multicast group
124 */
125
456b61bc
ED		 126#define for_each_pmc_rcu(np, pmc) \
127 for (pmc = rcu_dereference(np->ipv6_mc_list); \
128 pmc != NULL; \
129 pmc = rcu_dereference(pmc->next))
130
9acd9f3a 131int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
1da177e4
LT		 132{
133 struct net_device *dev = NULL;
134 struct ipv6_mc_socklist *mc_lst;
135 struct ipv6_pinfo *np = inet6_sk(sk);
3b1e0a65 136 struct net *net = sock_net(sk);
1da177e4
LT		 137 int err;
138
139 if (!ipv6_addr_is_multicast(addr))
140 return -EINVAL;
141
456b61bc
ED		 142 rcu_read_lock();
143 for_each_pmc_rcu(np, mc_lst) {
c9e3e8b6
DS		 144 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
145 ipv6_addr_equal(&mc_lst->addr, addr)) {
456b61bc 146 rcu_read_unlock();
c9e3e8b6
DS		 147 return -EADDRINUSE;
148 }
149 }
456b61bc 150 rcu_read_unlock();
c9e3e8b6 151
1da177e4
LT		 152 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
153
154 if (mc_lst == NULL)
155 return -ENOMEM;
156
157 mc_lst->next = NULL;
4e3fd7a0 158 mc_lst->addr = *addr;
1da177e4 159
96b52e61 160 rcu_read_lock();
1da177e4
LT		 161 if (ifindex == 0) {
162 struct rt6_info *rt;
b8ad0cbc 163 rt = rt6_lookup(net, addr, NULL, 0, 0);
1da177e4 164 if (rt) {
d1918542 165 dev = rt->dst.dev;
94e187c0 166 ip6_rt_put(rt);
1da177e4
LT		 167 }
168 } else
96b52e61 169 dev = dev_get_by_index_rcu(net, ifindex);
1da177e4
LT		 170
171 if (dev == NULL) {
96b52e61 172 rcu_read_unlock();
1da177e4
LT		 173 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
174 return -ENODEV;
175 }
176
177 mc_lst->ifindex = dev->ifindex;
178 mc_lst->sfmode = MCAST_EXCLUDE;
196433c5 179 rwlock_init(&mc_lst->sflock);
1da177e4
LT		 180 mc_lst->sflist = NULL;
181
182 /*
183 * now add/increase the group membership on the device
184 */
185
186 err = ipv6_dev_mc_inc(dev, addr);
187
188 if (err) {
96b52e61 189 rcu_read_unlock();
1da177e4 190 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
1da177e4
LT		 191 return err;
192 }
193
456b61bc 194 spin_lock(&ipv6_sk_mc_lock);
1da177e4 195 mc_lst->next = np->ipv6_mc_list;
456b61bc
ED		 196 rcu_assign_pointer(np->ipv6_mc_list, mc_lst);
197 spin_unlock(&ipv6_sk_mc_lock);
1da177e4 198
96b52e61 199 rcu_read_unlock();
1da177e4
LT		 200
201 return 0;
202}
203
204/*
205 * socket leave on multicast group
206 */
9acd9f3a 207int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
1da177e4
LT		 208{
209 struct ipv6_pinfo *np = inet6_sk(sk);
456b61bc
ED		 210 struct ipv6_mc_socklist *mc_lst;
211 struct ipv6_mc_socklist __rcu **lnk;
3b1e0a65 212 struct net *net = sock_net(sk);
1da177e4 213
a858d64b
LW		 214 if (!ipv6_addr_is_multicast(addr))
215 return -EINVAL;
216
456b61bc
ED		 217 spin_lock(&ipv6_sk_mc_lock);
218 for (lnk = &np->ipv6_mc_list;
219 (mc_lst = rcu_dereference_protected(*lnk,
220 lockdep_is_held(&ipv6_sk_mc_lock))) !=NULL ;
221 lnk = &mc_lst->next) {
1da177e4
LT		 222 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
223 ipv6_addr_equal(&mc_lst->addr, addr)) {
224 struct net_device *dev;
225
226 *lnk = mc_lst->next;
456b61bc 227 spin_unlock(&ipv6_sk_mc_lock);
1da177e4 228
96b52e61
ED		 229 rcu_read_lock();
230 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
b8ad0cbc 231 if (dev != NULL) {
96b52e61 232 struct inet6_dev *idev = __in6_dev_get(dev);
1da177e4 233
acd6e00b 234 (void) ip6_mc_leave_src(sk, mc_lst, idev);
96b52e61 235 if (idev)
1da177e4 236 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
acd6e00b
DS		 237 } else
238 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
96b52e61 239 rcu_read_unlock();
456b61bc 240 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
e3cbf28f 241 kfree_rcu(mc_lst, rcu);
1da177e4
LT		 242 return 0;
243 }
244 }
456b61bc 245 spin_unlock(&ipv6_sk_mc_lock);
1da177e4 246
9951f036 247 return -EADDRNOTAVAIL;
1da177e4
LT		 248}
249
96b52e61
ED		 250/* called with rcu_read_lock() */
251static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net,
b71d1d42 252 const struct in6_addr *group,
96b52e61 253 int ifindex)
1da177e4
LT		 254{
255 struct net_device *dev = NULL;
256 struct inet6_dev *idev = NULL;
257
258 if (ifindex == 0) {
96b52e61 259 struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0);
1da177e4 260
1da177e4 261 if (rt) {
d1918542 262 dev = rt->dst.dev;
94e187c0 263 ip6_rt_put(rt);
1da177e4
LT		 264 }
265 } else
96b52e61 266 dev = dev_get_by_index_rcu(net, ifindex);
1da177e4
LT		 267
268 if (!dev)
96b52e61
ED		 269 return NULL;
270 idev = __in6_dev_get(dev);
448eb71f 271 if (!idev)
8a22c99a 272 return NULL;
1da177e4 273 read_lock_bh(&idev->lock);
96b52e61
ED		 274 if (idev->dead) {
275 read_unlock_bh(&idev->lock);
276 return NULL;
277 }
1da177e4
LT		 278 return idev;
279}
280
281void ipv6_sock_mc_close(struct sock *sk)
282{
283 struct ipv6_pinfo *np = inet6_sk(sk);
284 struct ipv6_mc_socklist *mc_lst;
3b1e0a65 285 struct net *net = sock_net(sk);
1da177e4 286
0e1efe9d
ED		 287 if (!rcu_access_pointer(np->ipv6_mc_list))
288 return;
289
456b61bc
ED		 290 spin_lock(&ipv6_sk_mc_lock);
291 while ((mc_lst = rcu_dereference_protected(np->ipv6_mc_list,
292 lockdep_is_held(&ipv6_sk_mc_lock))) != NULL) {
1da177e4
LT		 293 struct net_device *dev;
294
295 np->ipv6_mc_list = mc_lst->next;
456b61bc 296 spin_unlock(&ipv6_sk_mc_lock);
1da177e4 297
96b52e61
ED		 298 rcu_read_lock();
299 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
1da177e4 300 if (dev) {
96b52e61 301 struct inet6_dev *idev = __in6_dev_get(dev);
1da177e4 302
acd6e00b 303 (void) ip6_mc_leave_src(sk, mc_lst, idev);
96b52e61 304 if (idev)
1da177e4 305 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
acd6e00b
DS		 306 } else
307 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
96b52e61 308 rcu_read_unlock();
1da177e4 309
456b61bc 310 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
e3cbf28f 311 kfree_rcu(mc_lst, rcu);
456b61bc
ED		 312
313 spin_lock(&ipv6_sk_mc_lock);
1da177e4 314 }
456b61bc 315 spin_unlock(&ipv6_sk_mc_lock);
1da177e4
LT		 316}
317
318int ip6_mc_source(int add, int omode, struct sock *sk,
319 struct group_source_req *pgsr)
320{
321 struct in6_addr *source, *group;
322 struct ipv6_mc_socklist *pmc;
1da177e4
LT		 323 struct inet6_dev *idev;
324 struct ipv6_pinfo *inet6 = inet6_sk(sk);
325 struct ip6_sf_socklist *psl;
3b1e0a65 326 struct net *net = sock_net(sk);
1da177e4 327 int i, j, rv;
c9e3e8b6 328 int leavegroup = 0;
5ab4a6c8 329 int pmclocked = 0;
1da177e4
LT		 330 int err;
331
1da177e4
LT		 332 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
333 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
334
335 if (!ipv6_addr_is_multicast(group))
336 return -EINVAL;
337
96b52e61
ED		 338 rcu_read_lock();
339 idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface);
340 if (!idev) {
341 rcu_read_unlock();
1da177e4 342 return -ENODEV;
96b52e61 343 }
1da177e4
LT		 344
345 err = -EADDRNOTAVAIL;
346
456b61bc 347 for_each_pmc_rcu(inet6, pmc) {
1da177e4
LT		 348 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
349 continue;
350 if (ipv6_addr_equal(&pmc->addr, group))
351 break;
352 }
917f2f10
DS		 353 if (!pmc) { /* must have a prior join */
354 err = -EINVAL;
1da177e4 355 goto done;
917f2f10 356 }
1da177e4
LT		 357 /* if a source filter was set, must be the same mode as before */
358 if (pmc->sflist) {
917f2f10
DS		 359 if (pmc->sfmode != omode) {
360 err = -EINVAL;
1da177e4 361 goto done;
917f2f10 362 }
1da177e4
LT		 363 } else if (pmc->sfmode != omode) {
364 /* allow mode switches for empty-set filters */
365 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
366 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
367 pmc->sfmode = omode;
368 }
369
96b52e61 370 write_lock(&pmc->sflock);
5ab4a6c8
DS		 371 pmclocked = 1;
372
1da177e4
LT		 373 psl = pmc->sflist;
374 if (!add) {
375 if (!psl)
917f2f10 376 goto done; /* err = -EADDRNOTAVAIL */
1da177e4
LT		 377 rv = !0;
378 for (i=0; i<psl->sl_count; i++) {
07c2fecc 379 rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
1da177e4
LT		 380 if (rv == 0)
381 break;
382 }
383 if (rv) /* source not found */
917f2f10 384 goto done; /* err = -EADDRNOTAVAIL */
1da177e4 385
c9e3e8b6
DS		 386 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
387 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
388 leavegroup = 1;
389 goto done;
390 }
391
1da177e4
LT		 392 /* update the interface filter */
393 ip6_mc_del_src(idev, group, omode, 1, source, 1);
394
395 for (j=i+1; j<psl->sl_count; j++)
396 psl->sl_addr[j-1] = psl->sl_addr[j];
397 psl->sl_count--;
398 err = 0;
399 goto done;
400 }
401 /* else, add a new source to the filter */
402
403 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
404 err = -ENOBUFS;
405 goto done;
406 }
407 if (!psl || psl->sl_count == psl->sl_max) {
408 struct ip6_sf_socklist *newpsl;
409 int count = IP6_SFBLOCK;
410
411 if (psl)
412 count += psl->sl_max;
8b3a7005 413 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
1da177e4
LT		 414 if (!newpsl) {
415 err = -ENOBUFS;
416 goto done;
417 }
418 newpsl->sl_max = count;
419 newpsl->sl_count = count - IP6_SFBLOCK;
420 if (psl) {
421 for (i=0; i<psl->sl_count; i++)
422 newpsl->sl_addr[i] = psl->sl_addr[i];
423 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
424 }
425 pmc->sflist = psl = newpsl;
426 }
427 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
428 for (i=0; i<psl->sl_count; i++) {
07c2fecc 429 rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
56db1c5f
JS		 430 if (rv == 0) /* There is an error in the address. */
431 goto done;
1da177e4 432 }
1da177e4
LT		 433 for (j=psl->sl_count-1; j>=i; j--)
434 psl->sl_addr[j+1] = psl->sl_addr[j];
435 psl->sl_addr[i] = *source;
436 psl->sl_count++;
437 err = 0;
438 /* update the interface list */
439 ip6_mc_add_src(idev, group, omode, 1, source, 1);
440done:
5ab4a6c8 441 if (pmclocked)
96b52e61 442 write_unlock(&pmc->sflock);
1da177e4 443 read_unlock_bh(&idev->lock);
96b52e61 444 rcu_read_unlock();
c9e3e8b6
DS		 445 if (leavegroup)
446 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
1da177e4
LT		 447 return err;
448}
449
450int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
451{
b71d1d42 452 const struct in6_addr *group;
1da177e4 453 struct ipv6_mc_socklist *pmc;
1da177e4
LT		 454 struct inet6_dev *idev;
455 struct ipv6_pinfo *inet6 = inet6_sk(sk);
456 struct ip6_sf_socklist *newpsl, *psl;
3b1e0a65 457 struct net *net = sock_net(sk);
9951f036 458 int leavegroup = 0;
1da177e4
LT		 459 int i, err;
460
461 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
462
463 if (!ipv6_addr_is_multicast(group))
464 return -EINVAL;
465 if (gsf->gf_fmode != MCAST_INCLUDE &&
466 gsf->gf_fmode != MCAST_EXCLUDE)
467 return -EINVAL;
468
96b52e61
ED		 469 rcu_read_lock();
470 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
1da177e4 471
96b52e61
ED		 472 if (!idev) {
473 rcu_read_unlock();
1da177e4 474 return -ENODEV;
96b52e61 475 }
1da177e4 476
9c05989b 477 err = 0;
5ab4a6c8 478
9951f036
DS		 479 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
480 leavegroup = 1;
481 goto done;
482 }
483
456b61bc 484 for_each_pmc_rcu(inet6, pmc) {
1da177e4
LT		 485 if (pmc->ifindex != gsf->gf_interface)
486 continue;
487 if (ipv6_addr_equal(&pmc->addr, group))
488 break;
489 }
917f2f10
DS		 490 if (!pmc) { /* must have a prior join */
491 err = -EINVAL;
1da177e4 492 goto done;
917f2f10 493 }
1da177e4 494 if (gsf->gf_numsrc) {
8b3a7005
KK		 495 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
496 GFP_ATOMIC);
1da177e4
LT		 497 if (!newpsl) {
498 err = -ENOBUFS;
499 goto done;
500 }
501 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
502 for (i=0; i<newpsl->sl_count; ++i) {
503 struct sockaddr_in6 *psin6;
504
505 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
506 newpsl->sl_addr[i] = psin6->sin6_addr;
507 }
508 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
509 newpsl->sl_count, newpsl->sl_addr, 0);
510 if (err) {
511 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
512 goto done;
513 }
8713dbf0 514 } else {
1da177e4 515 newpsl = NULL;
8713dbf0
YZ		 516 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
517 }
5ab4a6c8 518
96b52e61 519 write_lock(&pmc->sflock);
1da177e4
LT		 520 psl = pmc->sflist;
521 if (psl) {
522 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
523 psl->sl_count, psl->sl_addr, 0);
524 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
525 } else
526 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
527 pmc->sflist = newpsl;
528 pmc->sfmode = gsf->gf_fmode;
96b52e61 529 write_unlock(&pmc->sflock);
917f2f10 530 err = 0;
1da177e4
LT		 531done:
532 read_unlock_bh(&idev->lock);
96b52e61 533 rcu_read_unlock();
9951f036
DS		 534 if (leavegroup)
535 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
1da177e4
LT		 536 return err;
537}
538
539int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
540 struct group_filter __user *optval, int __user *optlen)
541{
542 int err, i, count, copycount;
b71d1d42 543 const struct in6_addr *group;
1da177e4
LT		 544 struct ipv6_mc_socklist *pmc;
545 struct inet6_dev *idev;
1da177e4
LT		 546 struct ipv6_pinfo *inet6 = inet6_sk(sk);
547 struct ip6_sf_socklist *psl;
3b1e0a65 548 struct net *net = sock_net(sk);
1da177e4
LT		 549
550 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
551
552 if (!ipv6_addr_is_multicast(group))
553 return -EINVAL;
554
96b52e61
ED		 555 rcu_read_lock();
556 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
1da177e4 557
96b52e61
ED		 558 if (!idev) {
559 rcu_read_unlock();
1da177e4 560 return -ENODEV;
96b52e61 561 }
1da177e4
LT		 562
563 err = -EADDRNOTAVAIL;
5ab4a6c8
DS		 564 /*
565 * changes to the ipv6_mc_list require the socket lock and
566 * a read lock on ip6_sk_mc_lock. We have the socket lock,
567 * so reading the list is safe.
568 */
1da177e4 569
456b61bc 570 for_each_pmc_rcu(inet6, pmc) {
1da177e4
LT		 571 if (pmc->ifindex != gsf->gf_interface)
572 continue;
573 if (ipv6_addr_equal(group, &pmc->addr))
574 break;
575 }
576 if (!pmc) /* must have a prior join */
577 goto done;
578 gsf->gf_fmode = pmc->sfmode;
579 psl = pmc->sflist;
580 count = psl ? psl->sl_count : 0;
581 read_unlock_bh(&idev->lock);
96b52e61 582 rcu_read_unlock();
1da177e4
LT		 583
584 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
585 gsf->gf_numsrc = count;
586 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
587 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
588 return -EFAULT;
589 }
5ab4a6c8
DS		 590 /* changes to psl require the socket lock, a read lock on
591 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
592 * have the socket lock, so reading here is safe.
593 */
1da177e4
LT		 594 for (i=0; i<copycount; i++) {
595 struct sockaddr_in6 *psin6;
596 struct sockaddr_storage ss;
597
598 psin6 = (struct sockaddr_in6 *)&ss;
599 memset(&ss, 0, sizeof(ss));
600 psin6->sin6_family = AF_INET6;
601 psin6->sin6_addr = psl->sl_addr[i];
1ab1457c 602 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
1da177e4
LT		 603 return -EFAULT;
604 }
605 return 0;
606done:
607 read_unlock_bh(&idev->lock);
96b52e61 608 rcu_read_unlock();
1da177e4
LT		 609 return err;
610}
611
a50feda5
ED		 612bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
613 const struct in6_addr *src_addr)
1da177e4
LT		 614{
615 struct ipv6_pinfo *np = inet6_sk(sk);
616 struct ipv6_mc_socklist *mc;
617 struct ip6_sf_socklist *psl;
a50feda5 618 bool rv = true;
1da177e4 619
456b61bc
ED		 620 rcu_read_lock();
621 for_each_pmc_rcu(np, mc) {
1da177e4
LT		 622 if (ipv6_addr_equal(&mc->addr, mc_addr))
623 break;
624 }
625 if (!mc) {
456b61bc 626 rcu_read_unlock();
a50feda5 627 return true;
1da177e4 628 }
5ab4a6c8 629 read_lock(&mc->sflock);
1da177e4
LT		 630 psl = mc->sflist;
631 if (!psl) {
632 rv = mc->sfmode == MCAST_EXCLUDE;
633 } else {
634 int i;
635
636 for (i=0; i<psl->sl_count; i++) {
637 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
638 break;
639 }
640 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
a50feda5 641 rv = false;
1da177e4 642 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
a50feda5 643 rv = false;
1da177e4 644 }
5ab4a6c8 645 read_unlock(&mc->sflock);
456b61bc 646 rcu_read_unlock();
1da177e4
LT		 647
648 return rv;
649}
650
651static void ma_put(struct ifmcaddr6 *mc)
652{
653 if (atomic_dec_and_test(&mc->mca_refcnt)) {
654 in6_dev_put(mc->idev);
655 kfree(mc);
656 }
657}
658
659static void igmp6_group_added(struct ifmcaddr6 *mc)
660{
661 struct net_device *dev = mc->idev->dev;
662 char buf[MAX_ADDR_LEN];
663
ec16ef22
YH		 664 if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
665 IPV6_ADDR_SCOPE_LINKLOCAL)
666 return;
667
1da177e4
LT		 668 spin_lock_bh(&mc->mca_lock);
669 if (!(mc->mca_flags&MAF_LOADED)) {
670 mc->mca_flags |= MAF_LOADED;
671 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
22bedad3 672 dev_mc_add(dev, buf);
1da177e4
LT		 673 }
674 spin_unlock_bh(&mc->mca_lock);
675
676 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
677 return;
678
679 if (MLD_V1_SEEN(mc->idev)) {
680 igmp6_join_group(mc);
681 return;
682 }
683 /* else v2 */
684
685 mc->mca_crcount = mc->idev->mc_qrv;
686 mld_ifc_event(mc->idev);
687}
688
689static void igmp6_group_dropped(struct ifmcaddr6 *mc)
690{
691 struct net_device *dev = mc->idev->dev;
692 char buf[MAX_ADDR_LEN];
693
ec16ef22
YH		 694 if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
695 IPV6_ADDR_SCOPE_LINKLOCAL)
696 return;
697
1da177e4
LT		 698 spin_lock_bh(&mc->mca_lock);
699 if (mc->mca_flags&MAF_LOADED) {
700 mc->mca_flags &= ~MAF_LOADED;
701 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
22bedad3 702 dev_mc_del(dev, buf);
1da177e4
LT		 703 }
704
705 if (mc->mca_flags & MAF_NOREPORT)
706 goto done;
707 spin_unlock_bh(&mc->mca_lock);
708
709 if (!mc->idev->dead)
710 igmp6_leave_group(mc);
711
712 spin_lock_bh(&mc->mca_lock);
713 if (del_timer(&mc->mca_timer))
714 atomic_dec(&mc->mca_refcnt);
715done:
716 ip6_mc_clear_src(mc);
717 spin_unlock_bh(&mc->mca_lock);
718}
719
720/*
721 * deleted ifmcaddr6 manipulation
722 */
723static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
724{
725 struct ifmcaddr6 *pmc;
726
727 /* this is an "ifmcaddr6" for convenience; only the fields below
728 * are actually used. In particular, the refcnt and users are not
729 * used for management of the delete list. Using the same structure
730 * for deleted items allows change reports to use common code with
731 * non-deleted or query-response MCA's.
732 */
0c600eda 733 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
1da177e4
LT		 734 if (!pmc)
735 return;
0c600eda 736
1da177e4
LT		 737 spin_lock_bh(&im->mca_lock);
738 spin_lock_init(&pmc->mca_lock);
739 pmc->idev = im->idev;
740 in6_dev_hold(idev);
741 pmc->mca_addr = im->mca_addr;
742 pmc->mca_crcount = idev->mc_qrv;
743 pmc->mca_sfmode = im->mca_sfmode;
744 if (pmc->mca_sfmode == MCAST_INCLUDE) {
745 struct ip6_sf_list *psf;
746
747 pmc->mca_tomb = im->mca_tomb;
748 pmc->mca_sources = im->mca_sources;
749 im->mca_tomb = im->mca_sources = NULL;
750 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
751 psf->sf_crcount = pmc->mca_crcount;
752 }
753 spin_unlock_bh(&im->mca_lock);
754
6457d26b 755 spin_lock_bh(&idev->mc_lock);
1da177e4
LT		 756 pmc->next = idev->mc_tomb;
757 idev->mc_tomb = pmc;
6457d26b 758 spin_unlock_bh(&idev->mc_lock);
1da177e4
LT		 759}
760
b71d1d42 761static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca)
1da177e4
LT		 762{
763 struct ifmcaddr6 *pmc, *pmc_prev;
764 struct ip6_sf_list *psf, *psf_next;
765
6457d26b 766 spin_lock_bh(&idev->mc_lock);
1da177e4
LT		 767 pmc_prev = NULL;
768 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
769 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
770 break;
771 pmc_prev = pmc;
772 }
773 if (pmc) {
774 if (pmc_prev)
775 pmc_prev->next = pmc->next;
776 else
777 idev->mc_tomb = pmc->next;
778 }
6457d26b
SH		 779 spin_unlock_bh(&idev->mc_lock);
780
1da177e4
LT		 781 if (pmc) {
782 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
783 psf_next = psf->sf_next;
784 kfree(psf);
785 }
786 in6_dev_put(pmc->idev);
787 kfree(pmc);
788 }
789}
790
791static void mld_clear_delrec(struct inet6_dev *idev)
792{
793 struct ifmcaddr6 *pmc, *nextpmc;
794
6457d26b 795 spin_lock_bh(&idev->mc_lock);
1da177e4
LT		 796 pmc = idev->mc_tomb;
797 idev->mc_tomb = NULL;
6457d26b 798 spin_unlock_bh(&idev->mc_lock);
1da177e4
LT		 799
800 for (; pmc; pmc = nextpmc) {
801 nextpmc = pmc->next;
802 ip6_mc_clear_src(pmc);
803 in6_dev_put(pmc->idev);
804 kfree(pmc);
805 }
806
807 /* clear dead sources, too */
808 read_lock_bh(&idev->lock);
809 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
810 struct ip6_sf_list *psf, *psf_next;
811
812 spin_lock_bh(&pmc->mca_lock);
813 psf = pmc->mca_tomb;
814 pmc->mca_tomb = NULL;
815 spin_unlock_bh(&pmc->mca_lock);
816 for (; psf; psf=psf_next) {
817 psf_next = psf->sf_next;
818 kfree(psf);
819 }
820 }
821 read_unlock_bh(&idev->lock);
822}
823
824
825/*
826 * device multicast group inc (add if not found)
827 */
9acd9f3a 828int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
1da177e4
LT		 829{
830 struct ifmcaddr6 *mc;
831 struct inet6_dev *idev;
832
96b52e61 833 /* we need to take a reference on idev */
1da177e4
LT		 834 idev = in6_dev_get(dev);
835
836 if (idev == NULL)
837 return -EINVAL;
838
839 write_lock_bh(&idev->lock);
840 if (idev->dead) {
841 write_unlock_bh(&idev->lock);
842 in6_dev_put(idev);
843 return -ENODEV;
844 }
845
846 for (mc = idev->mc_list; mc; mc = mc->next) {
847 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
848 mc->mca_users++;
849 write_unlock_bh(&idev->lock);
850 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
851 NULL, 0);
852 in6_dev_put(idev);
853 return 0;
854 }
855 }
856
857 /*
858 * not found: create a new one.
859 */
860
0c600eda 861 mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
1da177e4
LT		 862
863 if (mc == NULL) {
864 write_unlock_bh(&idev->lock);
865 in6_dev_put(idev);
866 return -ENOMEM;
867 }
868
b24b8a24 869 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
1da177e4 870
4e3fd7a0 871 mc->mca_addr = *addr;
96b52e61 872 mc->idev = idev; /* (reference taken) */
1da177e4
LT		 873 mc->mca_users = 1;
874 /* mca_stamp should be updated upon changes */
875 mc->mca_cstamp = mc->mca_tstamp = jiffies;
876 atomic_set(&mc->mca_refcnt, 2);
877 spin_lock_init(&mc->mca_lock);
878
879 /* initial mode is (EX, empty) */
880 mc->mca_sfmode = MCAST_EXCLUDE;
881 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
882
883 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
884 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
885 mc->mca_flags |= MAF_NOREPORT;
886
887 mc->next = idev->mc_list;
888 idev->mc_list = mc;
889 write_unlock_bh(&idev->lock);
890
891 mld_del_delrec(idev, &mc->mca_addr);
892 igmp6_group_added(mc);
893 ma_put(mc);
894 return 0;
895}
896
897/*
898 * device multicast group del
899 */
9acd9f3a 900int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
1da177e4
LT		 901{
902 struct ifmcaddr6 *ma, **map;
903
904 write_lock_bh(&idev->lock);
905 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
906 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
907 if (--ma->mca_users == 0) {
908 *map = ma->next;
909 write_unlock_bh(&idev->lock);
910
911 igmp6_group_dropped(ma);
912
913 ma_put(ma);
914 return 0;
915 }
916 write_unlock_bh(&idev->lock);
917 return 0;
918 }
919 }
920 write_unlock_bh(&idev->lock);
921
922 return -ENOENT;
923}
924
9acd9f3a 925int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
1da177e4 926{
96b52e61 927 struct inet6_dev *idev;
1da177e4
LT		 928 int err;
929
96b52e61 930 rcu_read_lock();
1da177e4 931
96b52e61
ED		 932 idev = __in6_dev_get(dev);
933 if (!idev)
934 err = -ENODEV;
935 else
936 err = __ipv6_dev_mc_dec(idev, addr);
1da177e4 937
96b52e61 938 rcu_read_unlock();
1da177e4
LT		 939 return err;
940}
941
1da177e4
LT		 942/*
943 * check if the interface/address pair is valid
944 */
a50feda5
ED		 945bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
946 const struct in6_addr *src_addr)
1da177e4
LT		 947{
948 struct inet6_dev *idev;
949 struct ifmcaddr6 *mc;
a50feda5 950 bool rv = false;
1da177e4 951
96b52e61
ED		 952 rcu_read_lock();
953 idev = __in6_dev_get(dev);
1da177e4
LT		 954 if (idev) {
955 read_lock_bh(&idev->lock);
956 for (mc = idev->mc_list; mc; mc=mc->next) {
957 if (ipv6_addr_equal(&mc->mca_addr, group))
958 break;
959 }
960 if (mc) {
961 if (src_addr && !ipv6_addr_any(src_addr)) {
962 struct ip6_sf_list *psf;
963
964 spin_lock_bh(&mc->mca_lock);
965 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
966 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
967 break;
968 }
969 if (psf)
970 rv = psf->sf_count[MCAST_INCLUDE] ||
971 psf->sf_count[MCAST_EXCLUDE] !=
972 mc->mca_sfcount[MCAST_EXCLUDE];
973 else
974 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
975 spin_unlock_bh(&mc->mca_lock);
976 } else
a50feda5 977 rv = true; /* don't filter unspecified source */
1da177e4
LT		 978 }
979 read_unlock_bh(&idev->lock);
1da177e4 980 }
96b52e61 981 rcu_read_unlock();
1da177e4
LT		 982 return rv;
983}
984
985static void mld_gq_start_timer(struct inet6_dev *idev)
986{
987 int tv = net_random() % idev->mc_maxdelay;
988
989 idev->mc_gq_running = 1;
990 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
991 in6_dev_hold(idev);
992}
993
994static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
995{
996 int tv = net_random() % delay;
997
998 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
999 in6_dev_hold(idev);
1000}
1001
1002/*
1003 * IGMP handling (alias multicast ICMPv6 messages)
1004 */
1005
1006static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1007{
1008 unsigned long delay = resptime;
1009
1010 /* Do not start timer for these addresses */
1011 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1012 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1013 return;
1014
1015 if (del_timer(&ma->mca_timer)) {
1016 atomic_dec(&ma->mca_refcnt);
1017 delay = ma->mca_timer.expires - jiffies;
1018 }
1019
1020 if (delay >= resptime) {
1021 if (resptime)
1022 delay = net_random() % resptime;
1023 else
1024 delay = 1;
1025 }
1026 ma->mca_timer.expires = jiffies + delay;
1027 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1028 atomic_inc(&ma->mca_refcnt);
1029 ma->mca_flags |= MAF_TIMER_RUNNING;
1030}
1031
5ab4a6c8 1032/* mark EXCLUDE-mode sources */
a50feda5
ED		 1033static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
1034 const struct in6_addr *srcs)
1da177e4
LT		 1035{
1036 struct ip6_sf_list *psf;
1037 int i, scount;
1038
1039 scount = 0;
1040 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1041 if (scount == nsrcs)
1042 break;
5ab4a6c8
DS		 1043 for (i=0; i<nsrcs; i++) {
1044 /* skip inactive filters */
e05c4ad3 1045 if (psf->sf_count[MCAST_INCLUDE] ||
5ab4a6c8
DS		 1046 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1047 psf->sf_count[MCAST_EXCLUDE])
ce713ee5 1048 break;
5ab4a6c8
DS		 1049 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1050 scount++;
1051 break;
1052 }
1053 }
1054 }
1055 pmc->mca_flags &= ~MAF_GSQUERY;
1056 if (scount == nsrcs) /* all sources excluded */
a50feda5
ED		 1057 return false;
1058 return true;
5ab4a6c8
DS		 1059}
1060
a50feda5
ED		 1061static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1062 const struct in6_addr *srcs)
5ab4a6c8
DS		 1063{
1064 struct ip6_sf_list *psf;
1065 int i, scount;
1066
1067 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1068 return mld_xmarksources(pmc, nsrcs, srcs);
1069
1070 /* mark INCLUDE-mode sources */
1071
1072 scount = 0;
1073 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1074 if (scount == nsrcs)
1075 break;
1076 for (i=0; i<nsrcs; i++) {
1da177e4
LT		 1077 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1078 psf->sf_gsresp = 1;
1079 scount++;
1080 break;
1081 }
5ab4a6c8
DS		 1082 }
1083 }
1084 if (!scount) {
1085 pmc->mca_flags &= ~MAF_GSQUERY;
a50feda5 1086 return false;
1da177e4 1087 }
5ab4a6c8 1088 pmc->mca_flags |= MAF_GSQUERY;
a50feda5 1089 return true;
1da177e4
LT		 1090}
1091
96b52e61 1092/* called with rcu_read_lock() */
1da177e4
LT		 1093int igmp6_event_query(struct sk_buff *skb)
1094{
97300b5f 1095 struct mld2_query *mlh2 = NULL;
1da177e4 1096 struct ifmcaddr6 *ma;
b71d1d42 1097 const struct in6_addr *group;
1da177e4
LT		 1098 unsigned long max_delay;
1099 struct inet6_dev *idev;
6e7cb837 1100 struct mld_msg *mld;
1da177e4
LT		 1101 int group_type;
1102 int mark = 0;
1103 int len;
1104
1105 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1106 return -EINVAL;
1107
1108 /* compute payload length excluding extension headers */
0660e03f 1109 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
cfe1fc77 1110 len -= skb_network_header_len(skb);
1da177e4
LT		 1111
1112 /* Drop queries with not link local source */
0660e03f 1113 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
1da177e4
LT		 1114 return -EINVAL;
1115
96b52e61 1116 idev = __in6_dev_get(skb->dev);
1da177e4
LT		 1117
1118 if (idev == NULL)
1119 return 0;
1120
6e7cb837
YH		 1121 mld = (struct mld_msg *)icmp6_hdr(skb);
1122 group = &mld->mld_mca;
1da177e4
LT		 1123 group_type = ipv6_addr_type(group);
1124
1125 if (group_type != IPV6_ADDR_ANY &&
96b52e61 1126 !(group_type&IPV6_ADDR_MULTICAST))
1da177e4 1127 return -EINVAL;
1da177e4
LT		 1128
1129 if (len == 24) {
1130 int switchback;
1131 /* MLDv1 router present */
1132
1133 /* Translate milliseconds to jiffies */
6e7cb837 1134 max_delay = (ntohs(mld->mld_maxdelay)*HZ)/1000;
1da177e4
LT		 1135
1136 switchback = (idev->mc_qrv + 1) * max_delay;
1137 idev->mc_v1_seen = jiffies + switchback;
1138
1139 /* cancel the interface change timer */
1140 idev->mc_ifc_count = 0;
1141 if (del_timer(&idev->mc_ifc_timer))
1142 __in6_dev_put(idev);
1143 /* clear deleted report items */
1144 mld_clear_delrec(idev);
1145 } else if (len >= 28) {
1ab1457c 1146 int srcs_offset = sizeof(struct mld2_query) -
97300b5f 1147 sizeof(struct icmp6hdr);
96b52e61 1148 if (!pskb_may_pull(skb, srcs_offset))
97300b5f 1149 return -EINVAL;
96b52e61 1150
9c70220b 1151 mlh2 = (struct mld2_query *)skb_transport_header(skb);
6e7cb837 1152 max_delay = (MLDV2_MRC(ntohs(mlh2->mld2q_mrc))*HZ)/1000;
1da177e4
LT		 1153 if (!max_delay)
1154 max_delay = 1;
1155 idev->mc_maxdelay = max_delay;
6e7cb837
YH		 1156 if (mlh2->mld2q_qrv)
1157 idev->mc_qrv = mlh2->mld2q_qrv;
1da177e4 1158 if (group_type == IPV6_ADDR_ANY) { /* general query */
96b52e61 1159 if (mlh2->mld2q_nsrcs)
1da177e4 1160 return -EINVAL; /* no sources allowed */
96b52e61 1161
1da177e4 1162 mld_gq_start_timer(idev);
1da177e4
LT		 1163 return 0;
1164 }
1165 /* mark sources to include, if group & source-specific */
6e7cb837 1166 if (mlh2->mld2q_nsrcs != 0) {
1ab1457c 1167 if (!pskb_may_pull(skb, srcs_offset +
96b52e61 1168 ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr)))
97300b5f 1169 return -EINVAL;
96b52e61 1170
9c70220b 1171 mlh2 = (struct mld2_query *)skb_transport_header(skb);
97300b5f
YZ		 1172 mark = 1;
1173 }
96b52e61 1174 } else
1da177e4 1175 return -EINVAL;
1da177e4
LT		 1176
1177 read_lock_bh(&idev->lock);
1178 if (group_type == IPV6_ADDR_ANY) {
1179 for (ma = idev->mc_list; ma; ma=ma->next) {
1180 spin_lock_bh(&ma->mca_lock);
1181 igmp6_group_queried(ma, max_delay);
1182 spin_unlock_bh(&ma->mca_lock);
1183 }
1184 } else {
1185 for (ma = idev->mc_list; ma; ma=ma->next) {
7add2a43 1186 if (!ipv6_addr_equal(group, &ma->mca_addr))
1da177e4
LT		 1187 continue;
1188 spin_lock_bh(&ma->mca_lock);
1189 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1190 /* gsquery <- gsquery && mark */
1191 if (!mark)
1192 ma->mca_flags &= ~MAF_GSQUERY;
1193 } else {
1194 /* gsquery <- mark */
1195 if (mark)
1196 ma->mca_flags |= MAF_GSQUERY;
1197 else
1198 ma->mca_flags &= ~MAF_GSQUERY;
1199 }
5ab4a6c8 1200 if (!(ma->mca_flags & MAF_GSQUERY) ||
6e7cb837 1201 mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs))
5ab4a6c8 1202 igmp6_group_queried(ma, max_delay);
1da177e4 1203 spin_unlock_bh(&ma->mca_lock);
7add2a43 1204 break;
1da177e4
LT		 1205 }
1206 }
1207 read_unlock_bh(&idev->lock);
1da177e4
LT		 1208
1209 return 0;
1210}
1211
96b52e61 1212/* called with rcu_read_lock() */
1da177e4
LT		 1213int igmp6_event_report(struct sk_buff *skb)
1214{
1215 struct ifmcaddr6 *ma;
1da177e4 1216 struct inet6_dev *idev;
6e7cb837 1217 struct mld_msg *mld;
1da177e4
LT		 1218 int addr_type;
1219
1220 /* Our own report looped back. Ignore it. */
1221 if (skb->pkt_type == PACKET_LOOPBACK)
1222 return 0;
1223
24c69275
DS		 1224 /* send our report if the MC router may not have heard this report */
1225 if (skb->pkt_type != PACKET_MULTICAST &&
1226 skb->pkt_type != PACKET_BROADCAST)
1227 return 0;
1228
6e7cb837 1229 if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr)))
1da177e4
LT		 1230 return -EINVAL;
1231
6e7cb837 1232 mld = (struct mld_msg *)icmp6_hdr(skb);
1da177e4
LT		 1233
1234 /* Drop reports with not link local source */
0660e03f 1235 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
1ab1457c 1236 if (addr_type != IPV6_ADDR_ANY &&
1da177e4
LT		 1237 !(addr_type&IPV6_ADDR_LINKLOCAL))
1238 return -EINVAL;
1239
96b52e61 1240 idev = __in6_dev_get(skb->dev);
1da177e4
LT		 1241 if (idev == NULL)
1242 return -ENODEV;
1243
1244 /*
1245 * Cancel the timer for this group
1246 */
1247
1248 read_lock_bh(&idev->lock);
1249 for (ma = idev->mc_list; ma; ma=ma->next) {
6e7cb837 1250 if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) {
1da177e4
LT		 1251 spin_lock(&ma->mca_lock);
1252 if (del_timer(&ma->mca_timer))
1253 atomic_dec(&ma->mca_refcnt);
1254 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1255 spin_unlock(&ma->mca_lock);
1256 break;
1257 }
1258 }
1259 read_unlock_bh(&idev->lock);
1da177e4
LT		 1260 return 0;
1261}
1262
a50feda5
ED		 1263static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1264 int gdeleted, int sdeleted)
1da177e4
LT		 1265{
1266 switch (type) {
1267 case MLD2_MODE_IS_INCLUDE:
1268 case MLD2_MODE_IS_EXCLUDE:
1269 if (gdeleted || sdeleted)
a50feda5 1270 return false;
5ab4a6c8
DS		 1271 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1272 if (pmc->mca_sfmode == MCAST_INCLUDE)
a50feda5 1273 return true;
5ab4a6c8
DS		 1274 /* don't include if this source is excluded
1275 * in all filters
1276 */
1277 if (psf->sf_count[MCAST_INCLUDE])
7add2a43 1278 return type == MLD2_MODE_IS_INCLUDE;
5ab4a6c8
DS		 1279 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1280 psf->sf_count[MCAST_EXCLUDE];
1281 }
a50feda5 1282 return false;
1da177e4
LT		 1283 case MLD2_CHANGE_TO_INCLUDE:
1284 if (gdeleted || sdeleted)
a50feda5 1285 return false;
1da177e4
LT		 1286 return psf->sf_count[MCAST_INCLUDE] != 0;
1287 case MLD2_CHANGE_TO_EXCLUDE:
1288 if (gdeleted || sdeleted)
a50feda5 1289 return false;
1da177e4
LT		 1290 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1291 psf->sf_count[MCAST_INCLUDE])
a50feda5 1292 return false;
1da177e4
LT		 1293 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1294 psf->sf_count[MCAST_EXCLUDE];
1295 case MLD2_ALLOW_NEW_SOURCES:
1296 if (gdeleted || !psf->sf_crcount)
a50feda5 1297 return false;
1da177e4
LT		 1298 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1299 case MLD2_BLOCK_OLD_SOURCES:
1300 if (pmc->mca_sfmode == MCAST_INCLUDE)
1301 return gdeleted || (psf->sf_crcount && sdeleted);
1302 return psf->sf_crcount && !gdeleted && !sdeleted;
1303 }
a50feda5 1304 return false;
1da177e4
LT		 1305}
1306
1307static int
1308mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1309{
1310 struct ip6_sf_list *psf;
1311 int scount = 0;
1312
1313 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1314 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1315 continue;
1316 scount++;
1317 }
1318 return scount;
1319}
1320
2576f17d
YH		 1321static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb,
1322 struct net_device *dev,
1323 const struct in6_addr *saddr,
1324 const struct in6_addr *daddr,
1325 int proto, int len)
1326{
1327 struct ipv6hdr *hdr;
1328
1329 skb->protocol = htons(ETH_P_IPV6);
1330 skb->dev = dev;
1331
1332 skb_reset_network_header(skb);
1333 skb_put(skb, sizeof(struct ipv6hdr));
1334 hdr = ipv6_hdr(skb);
1335
1336 ip6_flow_hdr(hdr, 0, 0);
1337
1338 hdr->payload_len = htons(len);
1339 hdr->nexthdr = proto;
1340 hdr->hop_limit = inet6_sk(sk)->hop_limit;
1341
1342 hdr->saddr = *saddr;
1343 hdr->daddr = *daddr;
1344}
1345
36bddbad 1346static struct sk_buff *mld_newpack(struct inet6_dev *idev, int size)
1da177e4 1347{
36bddbad 1348 struct net_device *dev = idev->dev;
c346dca1 1349 struct net *net = dev_net(dev);
b8ad0cbc 1350 struct sock *sk = net->ipv6.igmp_sk;
1da177e4
LT		 1351 struct sk_buff *skb;
1352 struct mld2_report *pmr;
1353 struct in6_addr addr_buf;
d7aabf22 1354 const struct in6_addr *saddr;
a7ae1992
HX		 1355 int hlen = LL_RESERVED_SPACE(dev);
1356 int tlen = dev->needed_tailroom;
1da177e4
LT		 1357 int err;
1358 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1359 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1360 IPV6_TLV_PADN, 0 };
1361
1362 /* we assume size > sizeof(ra) here */
a7ae1992 1363 size += hlen + tlen;
72e09ad1
ED		 1364 /* limit our allocations to order-0 page */
1365 size = min_t(int, size, SKB_MAX_ORDER(0, 0));
1366 skb = sock_alloc_send_skb(sk, size, 1, &err);
1da177e4 1367
cfcabdcc 1368 if (!skb)
1da177e4
LT		 1369 return NULL;
1370
a7ae1992 1371 skb_reserve(skb, hlen);
1da177e4 1372
36bddbad 1373 if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) {
1da177e4 1374 /* <draft-ietf-magma-mld-source-05.txt>:
1ab1457c 1375 * use unspecified address as the source address
1da177e4
LT		 1376 * when a valid link-local address is not available.
1377 */
d7aabf22
YH		 1378 saddr = &in6addr_any;
1379 } else
1380 saddr = &addr_buf;
1da177e4 1381
2576f17d 1382 ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0);
1da177e4
LT		 1383
1384 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1385
27a884dc 1386 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
d10ba34b
ACM		 1387 skb_put(skb, sizeof(*pmr));
1388 pmr = (struct mld2_report *)skb_transport_header(skb);
6e7cb837
YH		 1389 pmr->mld2r_type = ICMPV6_MLD2_REPORT;
1390 pmr->mld2r_resv1 = 0;
1391 pmr->mld2r_cksum = 0;
1392 pmr->mld2r_resv2 = 0;
1393 pmr->mld2r_ngrec = 0;
1da177e4
LT		 1394 return skb;
1395}
1396
1397static void mld_sendpack(struct sk_buff *skb)
1398{
0660e03f 1399 struct ipv6hdr *pip6 = ipv6_hdr(skb);
9c70220b
ACM		 1400 struct mld2_report *pmr =
1401 (struct mld2_report *)skb_transport_header(skb);
1da177e4 1402 int payload_len, mldlen;
96b52e61 1403 struct inet6_dev *idev;
c346dca1 1404 struct net *net = dev_net(skb->dev);
1da177e4 1405 int err;
4c9483b2 1406 struct flowi6 fl6;
adf30907 1407 struct dst_entry *dst;
1da177e4 1408
96b52e61
ED		 1409 rcu_read_lock();
1410 idev = __in6_dev_get(skb->dev);
edf391ff
NH		 1411 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
1412
27a884dc
ACM		 1413 payload_len = (skb->tail - skb->network_header) - sizeof(*pip6);
1414 mldlen = skb->tail - skb->transport_header;
1da177e4
LT		 1415 pip6->payload_len = htons(payload_len);
1416
6e7cb837
YH		 1417 pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1418 IPPROTO_ICMPV6,
1419 csum_partial(skb_transport_header(skb),
1420 mldlen, 0));
41927178 1421
4c9483b2 1422 icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT,
41927178
YH		 1423 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1424 skb->dev->ifindex);
12fd84f4 1425 dst = icmp6_dst_alloc(skb->dev, &fl6);
41927178 1426
452edd59
DM		 1427 err = 0;
1428 if (IS_ERR(dst)) {
1429 err = PTR_ERR(dst);
1430 dst = NULL;
1431 }
adf30907 1432 skb_dst_set(skb, dst);
41927178
YH		 1433 if (err)
1434 goto err_out;
1435
edf391ff
NH		 1436 payload_len = skb->len;
1437
b2e0b385 1438 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
41927178
YH		 1439 dst_output);
1440out:
1da177e4 1441 if (!err) {
2e6f312e
HFS		 1442 ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT);
1443 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
2e6f312e
HFS		 1444 } else {
1445 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
1446 }
1da177e4 1447
96b52e61 1448 rcu_read_unlock();
41927178
YH		 1449 return;
1450
1451err_out:
1452 kfree_skb(skb);
1453 goto out;
1da177e4
LT		 1454}
1455
1456static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1457{
fab10fe3 1458 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
1da177e4
LT		 1459}
1460
1461static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1462 int type, struct mld2_grec **ppgr)
1463{
1464 struct net_device *dev = pmc->idev->dev;
1465 struct mld2_report *pmr;
1466 struct mld2_grec *pgr;
1467
1468 if (!skb)
36bddbad 1469 skb = mld_newpack(pmc->idev, dev->mtu);
1da177e4
LT		 1470 if (!skb)
1471 return NULL;
1472 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1473 pgr->grec_type = type;
1474 pgr->grec_auxwords = 0;
1475 pgr->grec_nsrcs = 0;
1476 pgr->grec_mca = pmc->mca_addr; /* structure copy */
9c70220b 1477 pmr = (struct mld2_report *)skb_transport_header(skb);
6e7cb837 1478 pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1);
1da177e4
LT		 1479 *ppgr = pgr;
1480 return skb;
1481}
1482
1483#define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1484 skb_tailroom(skb)) : 0)
1485
1486static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1487 int type, int gdeleted, int sdeleted)
1488{
36bddbad
AW		 1489 struct inet6_dev *idev = pmc->idev;
1490 struct net_device *dev = idev->dev;
1da177e4
LT		 1491 struct mld2_report *pmr;
1492 struct mld2_grec *pgr = NULL;
1493 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
5ab4a6c8 1494 int scount, stotal, first, isquery, truncate;
1da177e4
LT		 1495
1496 if (pmc->mca_flags & MAF_NOREPORT)
1497 return skb;
1498
1499 isquery = type == MLD2_MODE_IS_INCLUDE ||
1500 type == MLD2_MODE_IS_EXCLUDE;
1501 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1502 type == MLD2_CHANGE_TO_EXCLUDE;
1503
5ab4a6c8
DS		 1504 stotal = scount = 0;
1505
1da177e4
LT		 1506 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1507
5ab4a6c8
DS		 1508 if (!*psf_list)
1509 goto empty_source;
1510
9c70220b 1511 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
1da177e4
LT		 1512
1513 /* EX and TO_EX get a fresh packet, if needed */
1514 if (truncate) {
6e7cb837 1515 if (pmr && pmr->mld2r_ngrec &&
1da177e4
LT		 1516 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1517 if (skb)
1518 mld_sendpack(skb);
36bddbad 1519 skb = mld_newpack(idev, dev->mtu);
1da177e4
LT		 1520 }
1521 }
1522 first = 1;
1da177e4
LT		 1523 psf_prev = NULL;
1524 for (psf=*psf_list; psf; psf=psf_next) {
1525 struct in6_addr *psrc;
1526
1527 psf_next = psf->sf_next;
1528
1529 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1530 psf_prev = psf;
1531 continue;
1532 }
1533
1534 /* clear marks on query responses */
1535 if (isquery)
1536 psf->sf_gsresp = 0;
1537
1538 if (AVAILABLE(skb) < sizeof(*psrc) +
1539 first*sizeof(struct mld2_grec)) {
1540 if (truncate && !first)
1541 break; /* truncate these */
1542 if (pgr)
1543 pgr->grec_nsrcs = htons(scount);
1544 if (skb)
1545 mld_sendpack(skb);
36bddbad 1546 skb = mld_newpack(idev, dev->mtu);
1da177e4
LT		 1547 first = 1;
1548 scount = 0;
1549 }
1550 if (first) {
1551 skb = add_grhead(skb, pmc, type, &pgr);
1552 first = 0;
1553 }
cc63f70b
AD		 1554 if (!skb)
1555 return NULL;
1da177e4
LT		 1556 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1557 *psrc = psf->sf_addr;
5ab4a6c8 1558 scount++; stotal++;
1da177e4
LT		 1559 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1560 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1561 psf->sf_crcount--;
1562 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1563 if (psf_prev)
1564 psf_prev->sf_next = psf->sf_next;
1565 else
1566 *psf_list = psf->sf_next;
1567 kfree(psf);
1568 continue;
1569 }
1570 }
1571 psf_prev = psf;
1572 }
5ab4a6c8
DS		 1573
1574empty_source:
1575 if (!stotal) {
1576 if (type == MLD2_ALLOW_NEW_SOURCES ||
1577 type == MLD2_BLOCK_OLD_SOURCES)
1578 return skb;
1579 if (pmc->mca_crcount || isquery) {
1580 /* make sure we have room for group header */
1581 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1582 mld_sendpack(skb);
1583 skb = NULL; /* add_grhead will get a new one */
1584 }
1585 skb = add_grhead(skb, pmc, type, &pgr);
1586 }
1587 }
1da177e4
LT		 1588 if (pgr)
1589 pgr->grec_nsrcs = htons(scount);
1590
1591 if (isquery)
1592 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1593 return skb;
1594}
1595
1596static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1597{
1598 struct sk_buff *skb = NULL;
1599 int type;
1600
36bddbad 1601 read_lock_bh(&idev->lock);
1da177e4 1602 if (!pmc) {
1da177e4
LT		 1603 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1604 if (pmc->mca_flags & MAF_NOREPORT)
1605 continue;
1606 spin_lock_bh(&pmc->mca_lock);
1607 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1608 type = MLD2_MODE_IS_EXCLUDE;
1609 else
1610 type = MLD2_MODE_IS_INCLUDE;
1611 skb = add_grec(skb, pmc, type, 0, 0);
1612 spin_unlock_bh(&pmc->mca_lock);
1613 }
1da177e4
LT		 1614 } else {
1615 spin_lock_bh(&pmc->mca_lock);
1616 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1617 type = MLD2_MODE_IS_EXCLUDE;
1618 else
1619 type = MLD2_MODE_IS_INCLUDE;
1620 skb = add_grec(skb, pmc, type, 0, 0);
1621 spin_unlock_bh(&pmc->mca_lock);
1622 }
36bddbad 1623 read_unlock_bh(&idev->lock);
1da177e4
LT		 1624 if (skb)
1625 mld_sendpack(skb);
1626}
1627
1628/*
1629 * remove zero-count source records from a source filter list
1630 */
1631static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1632{
1633 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1634
1635 psf_prev = NULL;
1636 for (psf=*ppsf; psf; psf = psf_next) {
1637 psf_next = psf->sf_next;
1638 if (psf->sf_crcount == 0) {
1639 if (psf_prev)
1640 psf_prev->sf_next = psf->sf_next;
1641 else
1642 *ppsf = psf->sf_next;
1643 kfree(psf);
1644 } else
1645 psf_prev = psf;
1646 }
1647}
1648
1649static void mld_send_cr(struct inet6_dev *idev)
1650{
1651 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1652 struct sk_buff *skb = NULL;
1653 int type, dtype;
1654
1655 read_lock_bh(&idev->lock);
6457d26b 1656 spin_lock(&idev->mc_lock);
1da177e4
LT		 1657
1658 /* deleted MCA's */
1659 pmc_prev = NULL;
1660 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1661 pmc_next = pmc->next;
1662 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1663 type = MLD2_BLOCK_OLD_SOURCES;
1664 dtype = MLD2_BLOCK_OLD_SOURCES;
1665 skb = add_grec(skb, pmc, type, 1, 0);
1666 skb = add_grec(skb, pmc, dtype, 1, 1);
1667 }
1668 if (pmc->mca_crcount) {
1da177e4
LT		 1669 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1670 type = MLD2_CHANGE_TO_INCLUDE;
1671 skb = add_grec(skb, pmc, type, 1, 0);
1672 }
5ab4a6c8 1673 pmc->mca_crcount--;
1da177e4
LT		 1674 if (pmc->mca_crcount == 0) {
1675 mld_clear_zeros(&pmc->mca_tomb);
1676 mld_clear_zeros(&pmc->mca_sources);
1677 }
1678 }
1679 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1680 !pmc->mca_sources) {
1681 if (pmc_prev)
1682 pmc_prev->next = pmc_next;
1683 else
1684 idev->mc_tomb = pmc_next;
1685 in6_dev_put(pmc->idev);
1686 kfree(pmc);
1687 } else
1688 pmc_prev = pmc;
1689 }
6457d26b 1690 spin_unlock(&idev->mc_lock);
1da177e4
LT		 1691
1692 /* change recs */
1693 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1694 spin_lock_bh(&pmc->mca_lock);
1695 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1696 type = MLD2_BLOCK_OLD_SOURCES;
1697 dtype = MLD2_ALLOW_NEW_SOURCES;
1698 } else {
1699 type = MLD2_ALLOW_NEW_SOURCES;
1700 dtype = MLD2_BLOCK_OLD_SOURCES;
1701 }
1702 skb = add_grec(skb, pmc, type, 0, 0);
1703 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1704
1705 /* filter mode changes */
1706 if (pmc->mca_crcount) {
1da177e4
LT		 1707 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1708 type = MLD2_CHANGE_TO_EXCLUDE;
1709 else
1710 type = MLD2_CHANGE_TO_INCLUDE;
1711 skb = add_grec(skb, pmc, type, 0, 0);
5ab4a6c8 1712 pmc->mca_crcount--;
1da177e4
LT		 1713 }
1714 spin_unlock_bh(&pmc->mca_lock);
1715 }
1716 read_unlock_bh(&idev->lock);
1717 if (!skb)
1718 return;
1719 (void) mld_sendpack(skb);
1720}
1721
1722static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1723{
c346dca1 1724 struct net *net = dev_net(dev);
b8ad0cbc 1725 struct sock *sk = net->ipv6.igmp_sk;
1da177e4 1726 struct inet6_dev *idev;
1ab1457c 1727 struct sk_buff *skb;
6e7cb837 1728 struct mld_msg *hdr;
d7aabf22 1729 const struct in6_addr *snd_addr, *saddr;
1da177e4 1730 struct in6_addr addr_buf;
a7ae1992
HX		 1731 int hlen = LL_RESERVED_SPACE(dev);
1732 int tlen = dev->needed_tailroom;
1da177e4
LT		 1733 int err, len, payload_len, full_len;
1734 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1735 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1736 IPV6_TLV_PADN, 0 };
4c9483b2 1737 struct flowi6 fl6;
adf30907 1738 struct dst_entry *dst;
1da177e4 1739
f3ee4010
YH		 1740 if (type == ICMPV6_MGM_REDUCTION)
1741 snd_addr = &in6addr_linklocal_allrouters;
1742 else
1743 snd_addr = addr;
1da177e4
LT		 1744
1745 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1746 payload_len = len + sizeof(ra);
1747 full_len = sizeof(struct ipv6hdr) + payload_len;
1748
edf391ff
NH		 1749 rcu_read_lock();
1750 IP6_UPD_PO_STATS(net, __in6_dev_get(dev),
1751 IPSTATS_MIB_OUT, full_len);
1752 rcu_read_unlock();
1753
a7ae1992 1754 skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err);
1da177e4
LT		 1755
1756 if (skb == NULL) {
a11d206d 1757 rcu_read_lock();
3bd653c8 1758 IP6_INC_STATS(net, __in6_dev_get(dev),
a11d206d
YH		 1759 IPSTATS_MIB_OUTDISCARDS);
1760 rcu_read_unlock();
1da177e4
LT		 1761 return;
1762 }
1763
a7ae1992 1764 skb_reserve(skb, hlen);
1da177e4 1765
95c385b4 1766 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1da177e4 1767 /* <draft-ietf-magma-mld-source-05.txt>:
1ab1457c 1768 * use unspecified address as the source address
1da177e4
LT		 1769 * when a valid link-local address is not available.
1770 */
d7aabf22
YH		 1771 saddr = &in6addr_any;
1772 } else
1773 saddr = &addr_buf;
1da177e4 1774
2576f17d 1775 ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len);
1da177e4
LT		 1776
1777 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1778
6e7cb837
YH		 1779 hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg));
1780 memset(hdr, 0, sizeof(struct mld_msg));
1781 hdr->mld_type = type;
4e3fd7a0 1782 hdr->mld_mca = *addr;
1da177e4 1783
6e7cb837
YH		 1784 hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len,
1785 IPPROTO_ICMPV6,
1786 csum_partial(hdr, len, 0));
1da177e4 1787
96b52e61
ED		 1788 rcu_read_lock();
1789 idev = __in6_dev_get(skb->dev);
1da177e4 1790
4c9483b2 1791 icmpv6_flow_init(sk, &fl6, type,
41927178
YH		 1792 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1793 skb->dev->ifindex);
12fd84f4 1794 dst = icmp6_dst_alloc(skb->dev, &fl6);
452edd59
DM		 1795 if (IS_ERR(dst)) {
1796 err = PTR_ERR(dst);
41927178 1797 goto err_out;
452edd59 1798 }
41927178 1799
adf30907 1800 skb_dst_set(skb, dst);
b2e0b385 1801 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
41927178
YH		 1802 dst_output);
1803out:
1da177e4 1804 if (!err) {
5c5d244b 1805 ICMP6MSGOUT_INC_STATS(net, idev, type);
a862f6a6 1806 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
1da177e4 1807 } else
3bd653c8 1808 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
1da177e4 1809
96b52e61 1810 rcu_read_unlock();
1da177e4 1811 return;
41927178
YH		 1812
1813err_out:
1814 kfree_skb(skb);
1815 goto out;
1da177e4
LT		 1816}
1817
1818static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
b71d1d42 1819 const struct in6_addr *psfsrc)
1da177e4
LT		 1820{
1821 struct ip6_sf_list *psf, *psf_prev;
1822 int rv = 0;
1823
1824 psf_prev = NULL;
1825 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1826 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1827 break;
1828 psf_prev = psf;
1829 }
1830 if (!psf || psf->sf_count[sfmode] == 0) {
1831 /* source filter not found, or count wrong => bug */
1832 return -ESRCH;
1833 }
1834 psf->sf_count[sfmode]--;
1835 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1836 struct inet6_dev *idev = pmc->idev;
1837
1838 /* no more filters for this source */
1839 if (psf_prev)
1840 psf_prev->sf_next = psf->sf_next;
1841 else
1842 pmc->mca_sources = psf->sf_next;
1843 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1844 !MLD_V1_SEEN(idev)) {
1845 psf->sf_crcount = idev->mc_qrv;
1846 psf->sf_next = pmc->mca_tomb;
1847 pmc->mca_tomb = psf;
1848 rv = 1;
1849 } else
1850 kfree(psf);
1851 }
1852 return rv;
1853}
1854
b71d1d42
ED		 1855static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
1856 int sfmode, int sfcount, const struct in6_addr *psfsrc,
1da177e4
LT		 1857 int delta)
1858{
1859 struct ifmcaddr6 *pmc;
1860 int changerec = 0;
1861 int i, err;
1862
1863 if (!idev)
1864 return -ENODEV;
1865 read_lock_bh(&idev->lock);
1866 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1867 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1868 break;
1869 }
1870 if (!pmc) {
1871 /* MCA not found?? bug */
1872 read_unlock_bh(&idev->lock);
1873 return -ESRCH;
1874 }
1875 spin_lock_bh(&pmc->mca_lock);
1876 sf_markstate(pmc);
1877 if (!delta) {
1878 if (!pmc->mca_sfcount[sfmode]) {
1879 spin_unlock_bh(&pmc->mca_lock);
1880 read_unlock_bh(&idev->lock);
1881 return -EINVAL;
1882 }
1883 pmc->mca_sfcount[sfmode]--;
1884 }
1885 err = 0;
1886 for (i=0; i<sfcount; i++) {
1887 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1888
1889 changerec |= rv > 0;
1890 if (!err && rv < 0)
1891 err = rv;
1892 }
1893 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1894 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1895 pmc->mca_sfcount[MCAST_INCLUDE]) {
1896 struct ip6_sf_list *psf;
1897
1898 /* filter mode change */
1899 pmc->mca_sfmode = MCAST_INCLUDE;
1900 pmc->mca_crcount = idev->mc_qrv;
1901 idev->mc_ifc_count = pmc->mca_crcount;
1902 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1903 psf->sf_crcount = 0;
1904 mld_ifc_event(pmc->idev);
1905 } else if (sf_setstate(pmc) || changerec)
1906 mld_ifc_event(pmc->idev);
1907 spin_unlock_bh(&pmc->mca_lock);
1908 read_unlock_bh(&idev->lock);
1909 return err;
1910}
1911
1912/*
1913 * Add multicast single-source filter to the interface list
1914 */
1915static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
99d2f47a 1916 const struct in6_addr *psfsrc)
1da177e4
LT		 1917{
1918 struct ip6_sf_list *psf, *psf_prev;
1919
1920 psf_prev = NULL;
1921 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1922 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1923 break;
1924 psf_prev = psf;
1925 }
1926 if (!psf) {
0c600eda 1927 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
1da177e4
LT		 1928 if (!psf)
1929 return -ENOBUFS;
0c600eda 1930
1da177e4
LT		 1931 psf->sf_addr = *psfsrc;
1932 if (psf_prev) {
1933 psf_prev->sf_next = psf;
1934 } else
1935 pmc->mca_sources = psf;
1936 }
1937 psf->sf_count[sfmode]++;
1938 return 0;
1939}
1940
1941static void sf_markstate(struct ifmcaddr6 *pmc)
1942{
1943 struct ip6_sf_list *psf;
1944 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1945
1946 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1947 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1948 psf->sf_oldin = mca_xcount ==
1949 psf->sf_count[MCAST_EXCLUDE] &&
1950 !psf->sf_count[MCAST_INCLUDE];
1951 } else
1952 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
1953}
1954
1955static int sf_setstate(struct ifmcaddr6 *pmc)
1956{
7add2a43 1957 struct ip6_sf_list *psf, *dpsf;
1da177e4
LT		 1958 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1959 int qrv = pmc->idev->mc_qrv;
1960 int new_in, rv;
1961
1962 rv = 0;
1963 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1964 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1965 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
1966 !psf->sf_count[MCAST_INCLUDE];
1967 } else
1968 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
7add2a43
DS		 1969 if (new_in) {
1970 if (!psf->sf_oldin) {
e80e28b6 1971 struct ip6_sf_list *prev = NULL;
7add2a43
DS		 1972
1973 for (dpsf=pmc->mca_tomb; dpsf;
1974 dpsf=dpsf->sf_next) {
1975 if (ipv6_addr_equal(&dpsf->sf_addr,
1976 &psf->sf_addr))
1977 break;
1978 prev = dpsf;
1979 }
1980 if (dpsf) {
1981 if (prev)
1982 prev->sf_next = dpsf->sf_next;
1983 else
1984 pmc->mca_tomb = dpsf->sf_next;
1985 kfree(dpsf);
1986 }
1987 psf->sf_crcount = qrv;
1988 rv++;
1989 }
1990 } else if (psf->sf_oldin) {
1991 psf->sf_crcount = 0;
1992 /*
1993 * add or update "delete" records if an active filter
1994 * is now inactive
1995 */
1996 for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
1997 if (ipv6_addr_equal(&dpsf->sf_addr,
1998 &psf->sf_addr))
1999 break;
2000 if (!dpsf) {
5d55354f 2001 dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
7add2a43
DS		 2002 if (!dpsf)
2003 continue;
2004 *dpsf = *psf;
2005 /* pmc->mca_lock held by callers */
2006 dpsf->sf_next = pmc->mca_tomb;
2007 pmc->mca_tomb = dpsf;
2008 }
2009 dpsf->sf_crcount = qrv;
1da177e4
LT		 2010 rv++;
2011 }
2012 }
2013 return rv;
2014}
2015
2016/*
2017 * Add multicast source filter list to the interface list
2018 */
b71d1d42
ED		 2019static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2020 int sfmode, int sfcount, const struct in6_addr *psfsrc,
1da177e4
LT		 2021 int delta)
2022{
2023 struct ifmcaddr6 *pmc;
2024 int isexclude;
2025 int i, err;
2026
2027 if (!idev)
2028 return -ENODEV;
2029 read_lock_bh(&idev->lock);
2030 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2031 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2032 break;
2033 }
2034 if (!pmc) {
2035 /* MCA not found?? bug */
2036 read_unlock_bh(&idev->lock);
2037 return -ESRCH;
2038 }
2039 spin_lock_bh(&pmc->mca_lock);
2040
2041 sf_markstate(pmc);
2042 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2043 if (!delta)
2044 pmc->mca_sfcount[sfmode]++;
2045 err = 0;
2046 for (i=0; i<sfcount; i++) {
99d2f47a 2047 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]);
1da177e4
LT		 2048 if (err)
2049 break;
2050 }
2051 if (err) {
2052 int j;
2053
2054 if (!delta)
2055 pmc->mca_sfcount[sfmode]--;
2056 for (j=0; j<i; j++)
78d50217 2057 ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]);
1da177e4 2058 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
1da177e4
LT		 2059 struct ip6_sf_list *psf;
2060
2061 /* filter mode change */
2062 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2063 pmc->mca_sfmode = MCAST_EXCLUDE;
2064 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2065 pmc->mca_sfmode = MCAST_INCLUDE;
2066 /* else no filters; keep old mode for reports */
2067
2068 pmc->mca_crcount = idev->mc_qrv;
2069 idev->mc_ifc_count = pmc->mca_crcount;
2070 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2071 psf->sf_crcount = 0;
2072 mld_ifc_event(idev);
2073 } else if (sf_setstate(pmc))
2074 mld_ifc_event(idev);
2075 spin_unlock_bh(&pmc->mca_lock);
2076 read_unlock_bh(&idev->lock);
2077 return err;
2078}
2079
2080static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2081{
2082 struct ip6_sf_list *psf, *nextpsf;
2083
2084 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
2085 nextpsf = psf->sf_next;
2086 kfree(psf);
2087 }
2088 pmc->mca_tomb = NULL;
2089 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
2090 nextpsf = psf->sf_next;
2091 kfree(psf);
2092 }
2093 pmc->mca_sources = NULL;
2094 pmc->mca_sfmode = MCAST_EXCLUDE;
de9daad9 2095 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
1da177e4
LT		 2096 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2097}
2098
2099
2100static void igmp6_join_group(struct ifmcaddr6 *ma)
2101{
2102 unsigned long delay;
2103
2104 if (ma->mca_flags & MAF_NOREPORT)
2105 return;
2106
2107 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2108
2109 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
2110
2111 spin_lock_bh(&ma->mca_lock);
2112 if (del_timer(&ma->mca_timer)) {
2113 atomic_dec(&ma->mca_refcnt);
2114 delay = ma->mca_timer.expires - jiffies;
2115 }
2116
2117 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2118 atomic_inc(&ma->mca_refcnt);
2119 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2120 spin_unlock_bh(&ma->mca_lock);
2121}
2122
2123static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2124 struct inet6_dev *idev)
2125{
2126 int err;
2127
5ab4a6c8
DS		 2128 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2129 * so no other readers or writers of iml or its sflist
2130 */
cfcabdcc 2131 if (!iml->sflist) {
1da177e4
LT		 2132 /* any-source empty exclude case */
2133 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2134 }
2135 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2136 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2137 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2138 iml->sflist = NULL;
2139 return err;
2140}
2141
2142static void igmp6_leave_group(struct ifmcaddr6 *ma)
2143{
2144 if (MLD_V1_SEEN(ma->idev)) {
2145 if (ma->mca_flags & MAF_LAST_REPORTER)
2146 igmp6_send(&ma->mca_addr, ma->idev->dev,
2147 ICMPV6_MGM_REDUCTION);
2148 } else {
2149 mld_add_delrec(ma->idev, ma);
2150 mld_ifc_event(ma->idev);
2151 }
2152}
2153
2154static void mld_gq_timer_expire(unsigned long data)
2155{
2156 struct inet6_dev *idev = (struct inet6_dev *)data;
2157
2158 idev->mc_gq_running = 0;
2159 mld_send_report(idev, NULL);
ef04c1db 2160 in6_dev_put(idev);
1da177e4
LT		 2161}
2162
2163static void mld_ifc_timer_expire(unsigned long data)
2164{
2165 struct inet6_dev *idev = (struct inet6_dev *)data;
2166
2167 mld_send_cr(idev);
2168 if (idev->mc_ifc_count) {
2169 idev->mc_ifc_count--;
2170 if (idev->mc_ifc_count)
2171 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2172 }
ef04c1db 2173 in6_dev_put(idev);
1da177e4
LT		 2174}
2175
2176static void mld_ifc_event(struct inet6_dev *idev)
2177{
2178 if (MLD_V1_SEEN(idev))
2179 return;
2180 idev->mc_ifc_count = idev->mc_qrv;
2181 mld_ifc_start_timer(idev, 1);
2182}
2183
2184
2185static void igmp6_timer_handler(unsigned long data)
2186{
2187 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2188
2189 if (MLD_V1_SEEN(ma->idev))
2190 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2191 else
2192 mld_send_report(ma->idev, ma);
2193
2194 spin_lock(&ma->mca_lock);
2195 ma->mca_flags |= MAF_LAST_REPORTER;
2196 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2197 spin_unlock(&ma->mca_lock);
2198 ma_put(ma);
2199}
2200
75c78500
MS		 2201/* Device changing type */
2202
2203void ipv6_mc_unmap(struct inet6_dev *idev)
2204{
2205 struct ifmcaddr6 *i;
2206
2207 /* Install multicast list, except for all-nodes (already installed) */
2208
2209 read_lock_bh(&idev->lock);
2210 for (i = idev->mc_list; i; i = i->next)
2211 igmp6_group_dropped(i);
2212 read_unlock_bh(&idev->lock);
2213}
2214
2215void ipv6_mc_remap(struct inet6_dev *idev)
2216{
2217 ipv6_mc_up(idev);
2218}
2219
1da177e4
LT		 2220/* Device going down */
2221
2222void ipv6_mc_down(struct inet6_dev *idev)
2223{
2224 struct ifmcaddr6 *i;
2225
2226 /* Withdraw multicast list */
2227
2228 read_lock_bh(&idev->lock);
2229 idev->mc_ifc_count = 0;
2230 if (del_timer(&idev->mc_ifc_timer))
2231 __in6_dev_put(idev);
2232 idev->mc_gq_running = 0;
2233 if (del_timer(&idev->mc_gq_timer))
2234 __in6_dev_put(idev);
2235
2236 for (i = idev->mc_list; i; i=i->next)
2237 igmp6_group_dropped(i);
2238 read_unlock_bh(&idev->lock);
2239
2240 mld_clear_delrec(idev);
2241}
2242
2243
2244/* Device going up */
2245
2246void ipv6_mc_up(struct inet6_dev *idev)
2247{
2248 struct ifmcaddr6 *i;
2249
2250 /* Install multicast list, except for all-nodes (already installed) */
2251
2252 read_lock_bh(&idev->lock);
2253 for (i = idev->mc_list; i; i=i->next)
2254 igmp6_group_added(i);
2255 read_unlock_bh(&idev->lock);
2256}
2257
2258/* IPv6 device initialization. */
2259
2260void ipv6_mc_init_dev(struct inet6_dev *idev)
2261{
1da177e4 2262 write_lock_bh(&idev->lock);
6457d26b 2263 spin_lock_init(&idev->mc_lock);
1da177e4 2264 idev->mc_gq_running = 0;
b24b8a24
PE		 2265 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2266 (unsigned long)idev);
1da177e4
LT		 2267 idev->mc_tomb = NULL;
2268 idev->mc_ifc_count = 0;
b24b8a24
PE		 2269 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2270 (unsigned long)idev);
1da177e4
LT		 2271 idev->mc_qrv = MLD_QRV_DEFAULT;
2272 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2273 idev->mc_v1_seen = 0;
2274 write_unlock_bh(&idev->lock);
1da177e4
LT		 2275}
2276
2277/*
2278 * Device is about to be destroyed: clean up.
2279 */
2280
2281void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2282{
2283 struct ifmcaddr6 *i;
1da177e4
LT		 2284
2285 /* Deactivate timers */
2286 ipv6_mc_down(idev);
2287
2288 /* Delete all-nodes address. */
1da177e4
LT		 2289 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2290 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2291 * fail.
2292 */
f3ee4010 2293 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes);
1da177e4 2294
f3ee4010
YH		 2295 if (idev->cnf.forwarding)
2296 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters);
1da177e4
LT		 2297
2298 write_lock_bh(&idev->lock);
2299 while ((i = idev->mc_list) != NULL) {
2300 idev->mc_list = i->next;
2301 write_unlock_bh(&idev->lock);
2302
2303 igmp6_group_dropped(i);
2304 ma_put(i);
2305
2306 write_lock_bh(&idev->lock);
2307 }
2308 write_unlock_bh(&idev->lock);
2309}
2310
2311#ifdef CONFIG_PROC_FS
2312struct igmp6_mc_iter_state {
b8ad0cbc 2313 struct seq_net_private p;
1da177e4
LT		 2314 struct net_device *dev;
2315 struct inet6_dev *idev;
2316};
2317
2318#define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2319
2320static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2321{
2322 struct ifmcaddr6 *im = NULL;
2323 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
1218854a 2324 struct net *net = seq_file_net(seq);
1da177e4 2325
7562f876 2326 state->idev = NULL;
ce81b76a 2327 for_each_netdev_rcu(net, state->dev) {
1da177e4 2328 struct inet6_dev *idev;
ce81b76a 2329 idev = __in6_dev_get(state->dev);
1da177e4
LT		 2330 if (!idev)
2331 continue;
2332 read_lock_bh(&idev->lock);
2333 im = idev->mc_list;
2334 if (im) {
2335 state->idev = idev;
2336 break;
2337 }
2338 read_unlock_bh(&idev->lock);
1da177e4
LT		 2339 }
2340 return im;
2341}
2342
2343static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2344{
2345 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2346
2347 im = im->next;
2348 while (!im) {
ce81b76a 2349 if (likely(state->idev != NULL))
1da177e4 2350 read_unlock_bh(&state->idev->lock);
ce81b76a
ED		 2351
2352 state->dev = next_net_device_rcu(state->dev);
1da177e4
LT		 2353 if (!state->dev) {
2354 state->idev = NULL;
2355 break;
2356 }
ce81b76a 2357 state->idev = __in6_dev_get(state->dev);
1da177e4
LT		 2358 if (!state->idev)
2359 continue;
2360 read_lock_bh(&state->idev->lock);
2361 im = state->idev->mc_list;
2362 }
2363 return im;
2364}
2365
2366static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2367{
2368 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2369 if (im)
2370 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2371 --pos;
2372 return pos ? NULL : im;
2373}
2374
2375static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
ce81b76a 2376 __acquires(RCU)
1da177e4 2377{
ce81b76a 2378 rcu_read_lock();
1da177e4
LT		 2379 return igmp6_mc_get_idx(seq, *pos);
2380}
2381
2382static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2383{
ce81b76a
ED		 2384 struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v);
2385
1da177e4
LT		 2386 ++*pos;
2387 return im;
2388}
2389
2390static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
ce81b76a 2391 __releases(RCU)
1da177e4
LT		 2392{
2393 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
ce81b76a 2394
1da177e4
LT		 2395 if (likely(state->idev != NULL)) {
2396 read_unlock_bh(&state->idev->lock);
1da177e4
LT		 2397 state->idev = NULL;
2398 }
2399 state->dev = NULL;
ce81b76a 2400 rcu_read_unlock();
1da177e4
LT		 2401}
2402
2403static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2404{
2405 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2406 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2407
2408 seq_printf(seq,
4b7a4274 2409 "%-4d %-15s %pi6 %5d %08X %ld\n",
1da177e4 2410 state->dev->ifindex, state->dev->name,
b071195d 2411 &im->mca_addr,
1da177e4
LT		 2412 im->mca_users, im->mca_flags,
2413 (im->mca_flags&MAF_TIMER_RUNNING) ?
2414 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2415 return 0;
2416}
2417
56b3d975 2418static const struct seq_operations igmp6_mc_seq_ops = {
1da177e4
LT		 2419 .start = igmp6_mc_seq_start,
2420 .next = igmp6_mc_seq_next,
2421 .stop = igmp6_mc_seq_stop,
2422 .show = igmp6_mc_seq_show,
2423};
2424
2425static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2426{
b8ad0cbc
DL		 2427 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2428 sizeof(struct igmp6_mc_iter_state));
1da177e4
LT		 2429}
2430
9a32144e 2431static const struct file_operations igmp6_mc_seq_fops = {
1da177e4
LT		 2432 .owner = THIS_MODULE,
2433 .open = igmp6_mc_seq_open,
2434 .read = seq_read,
2435 .llseek = seq_lseek,
b8ad0cbc 2436 .release = seq_release_net,
1da177e4
LT		 2437};
2438
2439struct igmp6_mcf_iter_state {
b8ad0cbc 2440 struct seq_net_private p;
1da177e4
LT		 2441 struct net_device *dev;
2442 struct inet6_dev *idev;
2443 struct ifmcaddr6 *im;
2444};
2445
2446#define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2447
2448static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2449{
2450 struct ip6_sf_list *psf = NULL;
2451 struct ifmcaddr6 *im = NULL;
2452 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
1218854a 2453 struct net *net = seq_file_net(seq);
1da177e4 2454
7562f876
PE		 2455 state->idev = NULL;
2456 state->im = NULL;
ce81b76a 2457 for_each_netdev_rcu(net, state->dev) {
1da177e4 2458 struct inet6_dev *idev;
ce81b76a 2459 idev = __in6_dev_get(state->dev);
1da177e4
LT		 2460 if (unlikely(idev == NULL))
2461 continue;
2462 read_lock_bh(&idev->lock);
2463 im = idev->mc_list;
2464 if (likely(im != NULL)) {
2465 spin_lock_bh(&im->mca_lock);
2466 psf = im->mca_sources;
2467 if (likely(psf != NULL)) {
2468 state->im = im;
2469 state->idev = idev;
2470 break;
2471 }
2472 spin_unlock_bh(&im->mca_lock);
2473 }
2474 read_unlock_bh(&idev->lock);
1da177e4
LT		 2475 }
2476 return psf;
2477}
2478
2479static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2480{
2481 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2482
2483 psf = psf->sf_next;
2484 while (!psf) {
2485 spin_unlock_bh(&state->im->mca_lock);
2486 state->im = state->im->next;
2487 while (!state->im) {
ce81b76a 2488 if (likely(state->idev != NULL))
1da177e4 2489 read_unlock_bh(&state->idev->lock);
ce81b76a
ED		 2490
2491 state->dev = next_net_device_rcu(state->dev);
1da177e4
LT		 2492 if (!state->dev) {
2493 state->idev = NULL;
2494 goto out;
2495 }
ce81b76a 2496 state->idev = __in6_dev_get(state->dev);
1da177e4
LT		 2497 if (!state->idev)
2498 continue;
2499 read_lock_bh(&state->idev->lock);
2500 state->im = state->idev->mc_list;
2501 }
2502 if (!state->im)
2503 break;
2504 spin_lock_bh(&state->im->mca_lock);
2505 psf = state->im->mca_sources;
2506 }
2507out:
2508 return psf;
2509}
2510
2511static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2512{
2513 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2514 if (psf)
2515 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2516 --pos;
2517 return pos ? NULL : psf;
2518}
2519
2520static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
ce81b76a 2521 __acquires(RCU)
1da177e4 2522{
ce81b76a 2523 rcu_read_lock();
1da177e4
LT		 2524 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2525}
2526
2527static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2528{
2529 struct ip6_sf_list *psf;
2530 if (v == SEQ_START_TOKEN)
2531 psf = igmp6_mcf_get_first(seq);
2532 else
2533 psf = igmp6_mcf_get_next(seq, v);
2534 ++*pos;
2535 return psf;
2536}
2537
2538static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
ce81b76a 2539 __releases(RCU)
1da177e4
LT		 2540{
2541 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2542 if (likely(state->im != NULL)) {
2543 spin_unlock_bh(&state->im->mca_lock);
2544 state->im = NULL;
2545 }
2546 if (likely(state->idev != NULL)) {
2547 read_unlock_bh(&state->idev->lock);
1da177e4
LT		 2548 state->idev = NULL;
2549 }
2550 state->dev = NULL;
ce81b76a 2551 rcu_read_unlock();
1da177e4
LT		 2552}
2553
2554static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2555{
2556 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2557 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2558
2559 if (v == SEQ_START_TOKEN) {
1ab1457c 2560 seq_printf(seq,
1da177e4 2561 "%3s %6s "
9343e79a 2562 "%32s %32s %6s %6s\n", "Idx",
1da177e4
LT		 2563 "Device", "Multicast Address",
2564 "Source Address", "INC", "EXC");
2565 } else {
2566 seq_printf(seq,
4b7a4274 2567 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
1da177e4 2568 state->dev->ifindex, state->dev->name,
b071195d
HH		 2569 &state->im->mca_addr,
2570 &psf->sf_addr,
1da177e4
LT		 2571 psf->sf_count[MCAST_INCLUDE],
2572 psf->sf_count[MCAST_EXCLUDE]);
2573 }
2574 return 0;
2575}
2576
56b3d975 2577static const struct seq_operations igmp6_mcf_seq_ops = {
1da177e4
LT		 2578 .start = igmp6_mcf_seq_start,
2579 .next = igmp6_mcf_seq_next,
2580 .stop = igmp6_mcf_seq_stop,
2581 .show = igmp6_mcf_seq_show,
2582};
2583
2584static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2585{
b8ad0cbc
DL		 2586 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2587 sizeof(struct igmp6_mcf_iter_state));
1da177e4
LT		 2588}
2589
9a32144e 2590static const struct file_operations igmp6_mcf_seq_fops = {
1da177e4
LT		 2591 .owner = THIS_MODULE,
2592 .open = igmp6_mcf_seq_open,
2593 .read = seq_read,
2594 .llseek = seq_lseek,
b8ad0cbc 2595 .release = seq_release_net,
1da177e4 2596};
ea82edf7 2597
2c8c1e72 2598static int __net_init igmp6_proc_init(struct net *net)
ea82edf7
DL		 2599{
2600 int err;
2601
2602 err = -ENOMEM;
d4beaa66 2603 if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops))
ea82edf7 2604 goto out;
d4beaa66
G		 2605 if (!proc_create("mcfilter6", S_IRUGO, net->proc_net,
2606 &igmp6_mcf_seq_fops))
ea82edf7
DL		 2607 goto out_proc_net_igmp6;
2608
2609 err = 0;
2610out:
2611 return err;
2612
2613out_proc_net_igmp6:
ece31ffd 2614 remove_proc_entry("igmp6", net->proc_net);
ea82edf7
DL		 2615 goto out;
2616}
2617
2c8c1e72 2618static void __net_exit igmp6_proc_exit(struct net *net)
ea82edf7 2619{
ece31ffd
G		 2620 remove_proc_entry("mcfilter6", net->proc_net);
2621 remove_proc_entry("igmp6", net->proc_net);
ea82edf7
DL		 2622}
2623#else
2c8c1e72 2624static inline int igmp6_proc_init(struct net *net)
ea82edf7
DL		 2625{
2626 return 0;
2627}
2c8c1e72 2628static inline void igmp6_proc_exit(struct net *net)
ea82edf7 2629{
ea82edf7 2630}
1da177e4
LT		 2631#endif
2632
2c8c1e72 2633static int __net_init igmp6_net_init(struct net *net)
1da177e4 2634{
1da177e4
LT		 2635 int err;
2636
1ed8516f
DL		 2637 err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
2638 SOCK_RAW, IPPROTO_ICMPV6, net);
1da177e4 2639 if (err < 0) {
f3213831 2640 pr_err("Failed to initialize the IGMP6 control socket (err %d)\n",
1da177e4 2641 err);
b8ad0cbc 2642 goto out;
1da177e4
LT		 2643 }
2644
1ed8516f 2645 inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
1da177e4 2646
ea82edf7
DL		 2647 err = igmp6_proc_init(net);
2648 if (err)
b8ad0cbc 2649 goto out_sock_create;
b8ad0cbc
DL		 2650out:
2651 return err;
2652
2653out_sock_create:
1ed8516f 2654 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
b8ad0cbc 2655 goto out;
1da177e4
LT		 2656}
2657
2c8c1e72 2658static void __net_exit igmp6_net_exit(struct net *net)
1da177e4 2659{
1ed8516f 2660 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
ea82edf7 2661 igmp6_proc_exit(net);
1da177e4 2662}
b8ad0cbc
DL		 2663
2664static struct pernet_operations igmp6_net_ops = {
2665 .init = igmp6_net_init,
2666 .exit = igmp6_net_exit,
2667};
2668
2669int __init igmp6_init(void)
2670{
2671 return register_pernet_subsys(&igmp6_net_ops);
2672}
2673
2674void igmp6_cleanup(void)
2675{
2676 unregister_pernet_subsys(&igmp6_net_ops);
2677}
kernel source for telekom puls (alcatel/mediatek)