2 * Multicast support for IPv6
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
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.
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>:
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>
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>
46 #include <linux/slab.h>
47 #include <linux/pkt_sched.h>
50 #include <linux/netfilter.h>
51 #include <linux/netfilter_ipv6.h>
53 #include <net/net_namespace.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>
63 #include <net/inet_common.h>
65 #include <net/ip6_checksum.h>
67 /* Ensure that we have struct in6_addr aligned on 32bit word. */
68 static void *__mld2_query_bugs
[] __attribute__((__unused__
)) = {
69 BUILD_BUG_ON_NULL(offsetof(struct mld2_query
, mld2q_srcs
) % 4),
70 BUILD_BUG_ON_NULL(offsetof(struct mld2_report
, mld2r_grec
) % 4),
71 BUILD_BUG_ON_NULL(offsetof(struct mld2_grec
, grec_mca
) % 4)
74 static struct in6_addr mld2_all_mcr
= MLD2_ALL_MCR_INIT
;
76 static void igmp6_join_group(struct ifmcaddr6
*ma
);
77 static void igmp6_leave_group(struct ifmcaddr6
*ma
);
78 static void igmp6_timer_handler(unsigned long data
);
80 static void mld_gq_timer_expire(unsigned long data
);
81 static void mld_ifc_timer_expire(unsigned long data
);
82 static void mld_ifc_event(struct inet6_dev
*idev
);
83 static void mld_add_delrec(struct inet6_dev
*idev
, struct ifmcaddr6
*pmc
);
84 static void mld_del_delrec(struct inet6_dev
*idev
, const struct in6_addr
*addr
);
85 static void mld_clear_delrec(struct inet6_dev
*idev
);
86 static bool mld_in_v1_mode(const struct inet6_dev
*idev
);
87 static int sf_setstate(struct ifmcaddr6
*pmc
);
88 static void sf_markstate(struct ifmcaddr6
*pmc
);
89 static void ip6_mc_clear_src(struct ifmcaddr6
*pmc
);
90 static int ip6_mc_del_src(struct inet6_dev
*idev
, const struct in6_addr
*pmca
,
91 int sfmode
, int sfcount
, const struct in6_addr
*psfsrc
,
93 static int ip6_mc_add_src(struct inet6_dev
*idev
, const struct in6_addr
*pmca
,
94 int sfmode
, int sfcount
, const struct in6_addr
*psfsrc
,
96 static int ip6_mc_leave_src(struct sock
*sk
, struct ipv6_mc_socklist
*iml
,
97 struct inet6_dev
*idev
);
99 #define MLD_QRV_DEFAULT 2
100 /* RFC3810, 9.2. Query Interval */
101 #define MLD_QI_DEFAULT (125 * HZ)
102 /* RFC3810, 9.3. Query Response Interval */
103 #define MLD_QRI_DEFAULT (10 * HZ)
105 /* RFC3810, 8.1 Query Version Distinctions */
106 #define MLD_V1_QUERY_LEN 24
107 #define MLD_V2_QUERY_LEN_MIN 28
109 #define IPV6_MLD_MAX_MSF 64
111 int sysctl_mld_max_msf __read_mostly
= IPV6_MLD_MAX_MSF
;
112 int sysctl_mld_qrv __read_mostly
= MLD_QRV_DEFAULT
;
115 * socket join on multicast group
118 #define for_each_pmc_rcu(np, pmc) \
119 for (pmc = rcu_dereference(np->ipv6_mc_list); \
121 pmc = rcu_dereference(pmc->next))
123 static int unsolicited_report_interval(struct inet6_dev
*idev
)
127 if (mld_in_v1_mode(idev
))
128 iv
= idev
->cnf
.mldv1_unsolicited_report_interval
;
130 iv
= idev
->cnf
.mldv2_unsolicited_report_interval
;
132 return iv
> 0 ? iv
: 1;
135 int ipv6_sock_mc_join(struct sock
*sk
, int ifindex
, const struct in6_addr
*addr
)
137 struct net_device
*dev
= NULL
;
138 struct ipv6_mc_socklist
*mc_lst
;
139 struct ipv6_pinfo
*np
= inet6_sk(sk
);
140 struct net
*net
= sock_net(sk
);
145 if (!ipv6_addr_is_multicast(addr
))
149 for_each_pmc_rcu(np
, mc_lst
) {
150 if ((ifindex
== 0 || mc_lst
->ifindex
== ifindex
) &&
151 ipv6_addr_equal(&mc_lst
->addr
, addr
)) {
158 mc_lst
= sock_kmalloc(sk
, sizeof(struct ipv6_mc_socklist
), GFP_KERNEL
);
164 mc_lst
->addr
= *addr
;
168 rt
= rt6_lookup(net
, addr
, NULL
, 0, 0);
174 dev
= __dev_get_by_index(net
, ifindex
);
177 sock_kfree_s(sk
, mc_lst
, sizeof(*mc_lst
));
181 mc_lst
->ifindex
= dev
->ifindex
;
182 mc_lst
->sfmode
= MCAST_EXCLUDE
;
183 rwlock_init(&mc_lst
->sflock
);
184 mc_lst
->sflist
= NULL
;
187 * now add/increase the group membership on the device
190 err
= ipv6_dev_mc_inc(dev
, addr
);
193 sock_kfree_s(sk
, mc_lst
, sizeof(*mc_lst
));
197 mc_lst
->next
= np
->ipv6_mc_list
;
198 rcu_assign_pointer(np
->ipv6_mc_list
, mc_lst
);
202 EXPORT_SYMBOL(ipv6_sock_mc_join
);
205 * socket leave on multicast group
207 int ipv6_sock_mc_drop(struct sock
*sk
, int ifindex
, const struct in6_addr
*addr
)
209 struct ipv6_pinfo
*np
= inet6_sk(sk
);
210 struct ipv6_mc_socklist
*mc_lst
;
211 struct ipv6_mc_socklist __rcu
**lnk
;
212 struct net
*net
= sock_net(sk
);
216 if (!ipv6_addr_is_multicast(addr
))
219 for (lnk
= &np
->ipv6_mc_list
;
220 (mc_lst
= rtnl_dereference(*lnk
)) != NULL
;
221 lnk
= &mc_lst
->next
) {
222 if ((ifindex
== 0 || mc_lst
->ifindex
== ifindex
) &&
223 ipv6_addr_equal(&mc_lst
->addr
, addr
)) {
224 struct net_device
*dev
;
228 dev
= __dev_get_by_index(net
, mc_lst
->ifindex
);
230 struct inet6_dev
*idev
= __in6_dev_get(dev
);
232 (void) ip6_mc_leave_src(sk
, mc_lst
, idev
);
234 __ipv6_dev_mc_dec(idev
, &mc_lst
->addr
);
236 (void) ip6_mc_leave_src(sk
, mc_lst
, NULL
);
238 atomic_sub(sizeof(*mc_lst
), &sk
->sk_omem_alloc
);
239 kfree_rcu(mc_lst
, rcu
);
244 return -EADDRNOTAVAIL
;
246 EXPORT_SYMBOL(ipv6_sock_mc_drop
);
248 /* called with rcu_read_lock() */
249 static struct inet6_dev
*ip6_mc_find_dev_rcu(struct net
*net
,
250 const struct in6_addr
*group
,
253 struct net_device
*dev
= NULL
;
254 struct inet6_dev
*idev
= NULL
;
257 struct rt6_info
*rt
= rt6_lookup(net
, group
, NULL
, 0, 0);
264 dev
= dev_get_by_index_rcu(net
, ifindex
);
268 idev
= __in6_dev_get(dev
);
271 read_lock_bh(&idev
->lock
);
273 read_unlock_bh(&idev
->lock
);
279 void __ipv6_sock_mc_close(struct sock
*sk
)
281 struct ipv6_pinfo
*np
= inet6_sk(sk
);
282 struct ipv6_mc_socklist
*mc_lst
;
283 struct net
*net
= sock_net(sk
);
287 while ((mc_lst
= rtnl_dereference(np
->ipv6_mc_list
)) != NULL
) {
288 struct net_device
*dev
;
290 np
->ipv6_mc_list
= mc_lst
->next
;
292 dev
= __dev_get_by_index(net
, mc_lst
->ifindex
);
294 struct inet6_dev
*idev
= __in6_dev_get(dev
);
296 (void) ip6_mc_leave_src(sk
, mc_lst
, idev
);
298 __ipv6_dev_mc_dec(idev
, &mc_lst
->addr
);
300 (void) ip6_mc_leave_src(sk
, mc_lst
, NULL
);
302 atomic_sub(sizeof(*mc_lst
), &sk
->sk_omem_alloc
);
303 kfree_rcu(mc_lst
, rcu
);
307 void ipv6_sock_mc_close(struct sock
*sk
)
309 struct ipv6_pinfo
*np
= inet6_sk(sk
);
311 if (!rcu_access_pointer(np
->ipv6_mc_list
))
314 __ipv6_sock_mc_close(sk
);
318 int ip6_mc_source(int add
, int omode
, struct sock
*sk
,
319 struct group_source_req
*pgsr
)
321 struct in6_addr
*source
, *group
;
322 struct ipv6_mc_socklist
*pmc
;
323 struct inet6_dev
*idev
;
324 struct ipv6_pinfo
*inet6
= inet6_sk(sk
);
325 struct ip6_sf_socklist
*psl
;
326 struct net
*net
= sock_net(sk
);
332 source
= &((struct sockaddr_in6
*)&pgsr
->gsr_source
)->sin6_addr
;
333 group
= &((struct sockaddr_in6
*)&pgsr
->gsr_group
)->sin6_addr
;
335 if (!ipv6_addr_is_multicast(group
))
339 idev
= ip6_mc_find_dev_rcu(net
, group
, pgsr
->gsr_interface
);
345 err
= -EADDRNOTAVAIL
;
347 for_each_pmc_rcu(inet6
, pmc
) {
348 if (pgsr
->gsr_interface
&& pmc
->ifindex
!= pgsr
->gsr_interface
)
350 if (ipv6_addr_equal(&pmc
->addr
, group
))
353 if (!pmc
) { /* must have a prior join */
357 /* if a source filter was set, must be the same mode as before */
359 if (pmc
->sfmode
!= omode
) {
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);
370 write_lock(&pmc
->sflock
);
376 goto done
; /* err = -EADDRNOTAVAIL */
378 for (i
= 0; i
< psl
->sl_count
; i
++) {
379 rv
= !ipv6_addr_equal(&psl
->sl_addr
[i
], source
);
383 if (rv
) /* source not found */
384 goto done
; /* err = -EADDRNOTAVAIL */
386 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
387 if (psl
->sl_count
== 1 && omode
== MCAST_INCLUDE
) {
392 /* update the interface filter */
393 ip6_mc_del_src(idev
, group
, omode
, 1, source
, 1);
395 for (j
= i
+1; j
< psl
->sl_count
; j
++)
396 psl
->sl_addr
[j
-1] = psl
->sl_addr
[j
];
401 /* else, add a new source to the filter */
403 if (psl
&& psl
->sl_count
>= sysctl_mld_max_msf
) {
407 if (!psl
|| psl
->sl_count
== psl
->sl_max
) {
408 struct ip6_sf_socklist
*newpsl
;
409 int count
= IP6_SFBLOCK
;
412 count
+= psl
->sl_max
;
413 newpsl
= sock_kmalloc(sk
, IP6_SFLSIZE(count
), GFP_ATOMIC
);
418 newpsl
->sl_max
= count
;
419 newpsl
->sl_count
= count
- IP6_SFBLOCK
;
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
));
425 pmc
->sflist
= psl
= newpsl
;
427 rv
= 1; /* > 0 for insert logic below if sl_count is 0 */
428 for (i
= 0; i
< psl
->sl_count
; i
++) {
429 rv
= !ipv6_addr_equal(&psl
->sl_addr
[i
], source
);
430 if (rv
== 0) /* There is an error in the address. */
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
;
438 /* update the interface list */
439 ip6_mc_add_src(idev
, group
, omode
, 1, source
, 1);
442 write_unlock(&pmc
->sflock
);
443 read_unlock_bh(&idev
->lock
);
446 err
= ipv6_sock_mc_drop(sk
, pgsr
->gsr_interface
, group
);
450 int ip6_mc_msfilter(struct sock
*sk
, struct group_filter
*gsf
)
452 const struct in6_addr
*group
;
453 struct ipv6_mc_socklist
*pmc
;
454 struct inet6_dev
*idev
;
455 struct ipv6_pinfo
*inet6
= inet6_sk(sk
);
456 struct ip6_sf_socklist
*newpsl
, *psl
;
457 struct net
*net
= sock_net(sk
);
461 group
= &((struct sockaddr_in6
*)&gsf
->gf_group
)->sin6_addr
;
463 if (!ipv6_addr_is_multicast(group
))
465 if (gsf
->gf_fmode
!= MCAST_INCLUDE
&&
466 gsf
->gf_fmode
!= MCAST_EXCLUDE
)
470 idev
= ip6_mc_find_dev_rcu(net
, group
, gsf
->gf_interface
);
479 if (gsf
->gf_fmode
== MCAST_INCLUDE
&& gsf
->gf_numsrc
== 0) {
484 for_each_pmc_rcu(inet6
, pmc
) {
485 if (pmc
->ifindex
!= gsf
->gf_interface
)
487 if (ipv6_addr_equal(&pmc
->addr
, group
))
490 if (!pmc
) { /* must have a prior join */
494 if (gsf
->gf_numsrc
) {
495 newpsl
= sock_kmalloc(sk
, IP6_SFLSIZE(gsf
->gf_numsrc
),
501 newpsl
->sl_max
= newpsl
->sl_count
= gsf
->gf_numsrc
;
502 for (i
= 0; i
< newpsl
->sl_count
; ++i
) {
503 struct sockaddr_in6
*psin6
;
505 psin6
= (struct sockaddr_in6
*)&gsf
->gf_slist
[i
];
506 newpsl
->sl_addr
[i
] = psin6
->sin6_addr
;
508 err
= ip6_mc_add_src(idev
, group
, gsf
->gf_fmode
,
509 newpsl
->sl_count
, newpsl
->sl_addr
, 0);
511 sock_kfree_s(sk
, newpsl
, IP6_SFLSIZE(newpsl
->sl_max
));
516 (void) ip6_mc_add_src(idev
, group
, gsf
->gf_fmode
, 0, NULL
, 0);
519 write_lock(&pmc
->sflock
);
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
));
526 (void) ip6_mc_del_src(idev
, group
, pmc
->sfmode
, 0, NULL
, 0);
527 pmc
->sflist
= newpsl
;
528 pmc
->sfmode
= gsf
->gf_fmode
;
529 write_unlock(&pmc
->sflock
);
532 read_unlock_bh(&idev
->lock
);
535 err
= ipv6_sock_mc_drop(sk
, gsf
->gf_interface
, group
);
539 int ip6_mc_msfget(struct sock
*sk
, struct group_filter
*gsf
,
540 struct group_filter __user
*optval
, int __user
*optlen
)
542 int err
, i
, count
, copycount
;
543 const struct in6_addr
*group
;
544 struct ipv6_mc_socklist
*pmc
;
545 struct inet6_dev
*idev
;
546 struct ipv6_pinfo
*inet6
= inet6_sk(sk
);
547 struct ip6_sf_socklist
*psl
;
548 struct net
*net
= sock_net(sk
);
550 group
= &((struct sockaddr_in6
*)&gsf
->gf_group
)->sin6_addr
;
552 if (!ipv6_addr_is_multicast(group
))
556 idev
= ip6_mc_find_dev_rcu(net
, group
, gsf
->gf_interface
);
563 err
= -EADDRNOTAVAIL
;
564 /* changes to the ipv6_mc_list require the socket lock and
565 * rtnl lock. We have the socket lock and rcu read lock,
566 * so reading the list is safe.
569 for_each_pmc_rcu(inet6
, pmc
) {
570 if (pmc
->ifindex
!= gsf
->gf_interface
)
572 if (ipv6_addr_equal(group
, &pmc
->addr
))
575 if (!pmc
) /* must have a prior join */
577 gsf
->gf_fmode
= pmc
->sfmode
;
579 count
= psl
? psl
->sl_count
: 0;
580 read_unlock_bh(&idev
->lock
);
583 copycount
= count
< gsf
->gf_numsrc
? count
: gsf
->gf_numsrc
;
584 gsf
->gf_numsrc
= count
;
585 if (put_user(GROUP_FILTER_SIZE(copycount
), optlen
) ||
586 copy_to_user(optval
, gsf
, GROUP_FILTER_SIZE(0))) {
589 /* changes to psl require the socket lock, and a write lock
590 * on pmc->sflock. We have the socket lock so reading here is safe.
592 for (i
= 0; i
< copycount
; i
++) {
593 struct sockaddr_in6
*psin6
;
594 struct sockaddr_storage ss
;
596 psin6
= (struct sockaddr_in6
*)&ss
;
597 memset(&ss
, 0, sizeof(ss
));
598 psin6
->sin6_family
= AF_INET6
;
599 psin6
->sin6_addr
= psl
->sl_addr
[i
];
600 if (copy_to_user(&optval
->gf_slist
[i
], &ss
, sizeof(ss
)))
605 read_unlock_bh(&idev
->lock
);
610 bool inet6_mc_check(struct sock
*sk
, const struct in6_addr
*mc_addr
,
611 const struct in6_addr
*src_addr
)
613 struct ipv6_pinfo
*np
= inet6_sk(sk
);
614 struct ipv6_mc_socklist
*mc
;
615 struct ip6_sf_socklist
*psl
;
619 for_each_pmc_rcu(np
, mc
) {
620 if (ipv6_addr_equal(&mc
->addr
, mc_addr
))
627 read_lock(&mc
->sflock
);
630 rv
= mc
->sfmode
== MCAST_EXCLUDE
;
634 for (i
= 0; i
< psl
->sl_count
; i
++) {
635 if (ipv6_addr_equal(&psl
->sl_addr
[i
], src_addr
))
638 if (mc
->sfmode
== MCAST_INCLUDE
&& i
>= psl
->sl_count
)
640 if (mc
->sfmode
== MCAST_EXCLUDE
&& i
< psl
->sl_count
)
643 read_unlock(&mc
->sflock
);
649 static void igmp6_group_added(struct ifmcaddr6
*mc
)
651 struct net_device
*dev
= mc
->idev
->dev
;
652 char buf
[MAX_ADDR_LEN
];
654 if (IPV6_ADDR_MC_SCOPE(&mc
->mca_addr
) <
655 IPV6_ADDR_SCOPE_LINKLOCAL
)
658 spin_lock_bh(&mc
->mca_lock
);
659 if (!(mc
->mca_flags
&MAF_LOADED
)) {
660 mc
->mca_flags
|= MAF_LOADED
;
661 if (ndisc_mc_map(&mc
->mca_addr
, buf
, dev
, 0) == 0)
662 dev_mc_add(dev
, buf
);
664 spin_unlock_bh(&mc
->mca_lock
);
666 if (!(dev
->flags
& IFF_UP
) || (mc
->mca_flags
& MAF_NOREPORT
))
669 if (mld_in_v1_mode(mc
->idev
)) {
670 igmp6_join_group(mc
);
675 mc
->mca_crcount
= mc
->idev
->mc_qrv
;
676 mld_ifc_event(mc
->idev
);
679 static void igmp6_group_dropped(struct ifmcaddr6
*mc
)
681 struct net_device
*dev
= mc
->idev
->dev
;
682 char buf
[MAX_ADDR_LEN
];
684 if (IPV6_ADDR_MC_SCOPE(&mc
->mca_addr
) <
685 IPV6_ADDR_SCOPE_LINKLOCAL
)
688 spin_lock_bh(&mc
->mca_lock
);
689 if (mc
->mca_flags
&MAF_LOADED
) {
690 mc
->mca_flags
&= ~MAF_LOADED
;
691 if (ndisc_mc_map(&mc
->mca_addr
, buf
, dev
, 0) == 0)
692 dev_mc_del(dev
, buf
);
695 if (mc
->mca_flags
& MAF_NOREPORT
)
697 spin_unlock_bh(&mc
->mca_lock
);
700 igmp6_leave_group(mc
);
702 spin_lock_bh(&mc
->mca_lock
);
703 if (del_timer(&mc
->mca_timer
))
704 atomic_dec(&mc
->mca_refcnt
);
706 ip6_mc_clear_src(mc
);
707 spin_unlock_bh(&mc
->mca_lock
);
711 * deleted ifmcaddr6 manipulation
713 static void mld_add_delrec(struct inet6_dev
*idev
, struct ifmcaddr6
*im
)
715 struct ifmcaddr6
*pmc
;
717 /* this is an "ifmcaddr6" for convenience; only the fields below
718 * are actually used. In particular, the refcnt and users are not
719 * used for management of the delete list. Using the same structure
720 * for deleted items allows change reports to use common code with
721 * non-deleted or query-response MCA's.
723 pmc
= kzalloc(sizeof(*pmc
), GFP_ATOMIC
);
727 spin_lock_bh(&im
->mca_lock
);
728 spin_lock_init(&pmc
->mca_lock
);
729 pmc
->idev
= im
->idev
;
731 pmc
->mca_addr
= im
->mca_addr
;
732 pmc
->mca_crcount
= idev
->mc_qrv
;
733 pmc
->mca_sfmode
= im
->mca_sfmode
;
734 if (pmc
->mca_sfmode
== MCAST_INCLUDE
) {
735 struct ip6_sf_list
*psf
;
737 pmc
->mca_tomb
= im
->mca_tomb
;
738 pmc
->mca_sources
= im
->mca_sources
;
739 im
->mca_tomb
= im
->mca_sources
= NULL
;
740 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
)
741 psf
->sf_crcount
= pmc
->mca_crcount
;
743 spin_unlock_bh(&im
->mca_lock
);
745 spin_lock_bh(&idev
->mc_lock
);
746 pmc
->next
= idev
->mc_tomb
;
748 spin_unlock_bh(&idev
->mc_lock
);
751 static void mld_del_delrec(struct inet6_dev
*idev
, const struct in6_addr
*pmca
)
753 struct ifmcaddr6
*pmc
, *pmc_prev
;
754 struct ip6_sf_list
*psf
, *psf_next
;
756 spin_lock_bh(&idev
->mc_lock
);
758 for (pmc
= idev
->mc_tomb
; pmc
; pmc
= pmc
->next
) {
759 if (ipv6_addr_equal(&pmc
->mca_addr
, pmca
))
765 pmc_prev
->next
= pmc
->next
;
767 idev
->mc_tomb
= pmc
->next
;
769 spin_unlock_bh(&idev
->mc_lock
);
772 for (psf
= pmc
->mca_tomb
; psf
; psf
= psf_next
) {
773 psf_next
= psf
->sf_next
;
776 in6_dev_put(pmc
->idev
);
781 static void mld_clear_delrec(struct inet6_dev
*idev
)
783 struct ifmcaddr6
*pmc
, *nextpmc
;
785 spin_lock_bh(&idev
->mc_lock
);
787 idev
->mc_tomb
= NULL
;
788 spin_unlock_bh(&idev
->mc_lock
);
790 for (; pmc
; pmc
= nextpmc
) {
792 ip6_mc_clear_src(pmc
);
793 in6_dev_put(pmc
->idev
);
797 /* clear dead sources, too */
798 read_lock_bh(&idev
->lock
);
799 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
) {
800 struct ip6_sf_list
*psf
, *psf_next
;
802 spin_lock_bh(&pmc
->mca_lock
);
804 pmc
->mca_tomb
= NULL
;
805 spin_unlock_bh(&pmc
->mca_lock
);
806 for (; psf
; psf
= psf_next
) {
807 psf_next
= psf
->sf_next
;
811 read_unlock_bh(&idev
->lock
);
814 static void mca_get(struct ifmcaddr6
*mc
)
816 atomic_inc(&mc
->mca_refcnt
);
819 static void ma_put(struct ifmcaddr6
*mc
)
821 if (atomic_dec_and_test(&mc
->mca_refcnt
)) {
822 in6_dev_put(mc
->idev
);
827 static struct ifmcaddr6
*mca_alloc(struct inet6_dev
*idev
,
828 const struct in6_addr
*addr
)
830 struct ifmcaddr6
*mc
;
832 mc
= kzalloc(sizeof(*mc
), GFP_ATOMIC
);
836 setup_timer(&mc
->mca_timer
, igmp6_timer_handler
, (unsigned long)mc
);
838 mc
->mca_addr
= *addr
;
839 mc
->idev
= idev
; /* reference taken by caller */
841 /* mca_stamp should be updated upon changes */
842 mc
->mca_cstamp
= mc
->mca_tstamp
= jiffies
;
843 atomic_set(&mc
->mca_refcnt
, 1);
844 spin_lock_init(&mc
->mca_lock
);
846 /* initial mode is (EX, empty) */
847 mc
->mca_sfmode
= MCAST_EXCLUDE
;
848 mc
->mca_sfcount
[MCAST_EXCLUDE
] = 1;
850 if (ipv6_addr_is_ll_all_nodes(&mc
->mca_addr
) ||
851 IPV6_ADDR_MC_SCOPE(&mc
->mca_addr
) < IPV6_ADDR_SCOPE_LINKLOCAL
)
852 mc
->mca_flags
|= MAF_NOREPORT
;
858 * device multicast group inc (add if not found)
860 int ipv6_dev_mc_inc(struct net_device
*dev
, const struct in6_addr
*addr
)
862 struct ifmcaddr6
*mc
;
863 struct inet6_dev
*idev
;
867 /* we need to take a reference on idev */
868 idev
= in6_dev_get(dev
);
873 write_lock_bh(&idev
->lock
);
875 write_unlock_bh(&idev
->lock
);
880 for (mc
= idev
->mc_list
; mc
; mc
= mc
->next
) {
881 if (ipv6_addr_equal(&mc
->mca_addr
, addr
)) {
883 write_unlock_bh(&idev
->lock
);
884 ip6_mc_add_src(idev
, &mc
->mca_addr
, MCAST_EXCLUDE
, 0,
891 mc
= mca_alloc(idev
, addr
);
893 write_unlock_bh(&idev
->lock
);
898 mc
->next
= idev
->mc_list
;
901 /* Hold this for the code below before we unlock,
902 * it is already exposed via idev->mc_list.
905 write_unlock_bh(&idev
->lock
);
907 mld_del_delrec(idev
, &mc
->mca_addr
);
908 igmp6_group_added(mc
);
914 * device multicast group del
916 int __ipv6_dev_mc_dec(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
918 struct ifmcaddr6
*ma
, **map
;
922 write_lock_bh(&idev
->lock
);
923 for (map
= &idev
->mc_list
; (ma
= *map
) != NULL
; map
= &ma
->next
) {
924 if (ipv6_addr_equal(&ma
->mca_addr
, addr
)) {
925 if (--ma
->mca_users
== 0) {
927 write_unlock_bh(&idev
->lock
);
929 igmp6_group_dropped(ma
);
934 write_unlock_bh(&idev
->lock
);
938 write_unlock_bh(&idev
->lock
);
943 int ipv6_dev_mc_dec(struct net_device
*dev
, const struct in6_addr
*addr
)
945 struct inet6_dev
*idev
;
950 idev
= __in6_dev_get(dev
);
954 err
= __ipv6_dev_mc_dec(idev
, addr
);
960 * check if the interface/address pair is valid
962 bool ipv6_chk_mcast_addr(struct net_device
*dev
, const struct in6_addr
*group
,
963 const struct in6_addr
*src_addr
)
965 struct inet6_dev
*idev
;
966 struct ifmcaddr6
*mc
;
970 idev
= __in6_dev_get(dev
);
972 read_lock_bh(&idev
->lock
);
973 for (mc
= idev
->mc_list
; mc
; mc
= mc
->next
) {
974 if (ipv6_addr_equal(&mc
->mca_addr
, group
))
978 if (src_addr
&& !ipv6_addr_any(src_addr
)) {
979 struct ip6_sf_list
*psf
;
981 spin_lock_bh(&mc
->mca_lock
);
982 for (psf
= mc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
983 if (ipv6_addr_equal(&psf
->sf_addr
, src_addr
))
987 rv
= psf
->sf_count
[MCAST_INCLUDE
] ||
988 psf
->sf_count
[MCAST_EXCLUDE
] !=
989 mc
->mca_sfcount
[MCAST_EXCLUDE
];
991 rv
= mc
->mca_sfcount
[MCAST_EXCLUDE
] != 0;
992 spin_unlock_bh(&mc
->mca_lock
);
994 rv
= true; /* don't filter unspecified source */
996 read_unlock_bh(&idev
->lock
);
1002 static void mld_gq_start_timer(struct inet6_dev
*idev
)
1004 unsigned long tv
= prandom_u32() % idev
->mc_maxdelay
;
1006 idev
->mc_gq_running
= 1;
1007 if (!mod_timer(&idev
->mc_gq_timer
, jiffies
+tv
+2))
1011 static void mld_gq_stop_timer(struct inet6_dev
*idev
)
1013 idev
->mc_gq_running
= 0;
1014 if (del_timer(&idev
->mc_gq_timer
))
1015 __in6_dev_put(idev
);
1018 static void mld_ifc_start_timer(struct inet6_dev
*idev
, unsigned long delay
)
1020 unsigned long tv
= prandom_u32() % delay
;
1022 if (!mod_timer(&idev
->mc_ifc_timer
, jiffies
+tv
+2))
1026 static void mld_ifc_stop_timer(struct inet6_dev
*idev
)
1028 idev
->mc_ifc_count
= 0;
1029 if (del_timer(&idev
->mc_ifc_timer
))
1030 __in6_dev_put(idev
);
1033 static void mld_dad_start_timer(struct inet6_dev
*idev
, unsigned long delay
)
1035 unsigned long tv
= prandom_u32() % delay
;
1037 if (!mod_timer(&idev
->mc_dad_timer
, jiffies
+tv
+2))
1041 static void mld_dad_stop_timer(struct inet6_dev
*idev
)
1043 if (del_timer(&idev
->mc_dad_timer
))
1044 __in6_dev_put(idev
);
1048 * IGMP handling (alias multicast ICMPv6 messages)
1051 static void igmp6_group_queried(struct ifmcaddr6
*ma
, unsigned long resptime
)
1053 unsigned long delay
= resptime
;
1055 /* Do not start timer for these addresses */
1056 if (ipv6_addr_is_ll_all_nodes(&ma
->mca_addr
) ||
1057 IPV6_ADDR_MC_SCOPE(&ma
->mca_addr
) < IPV6_ADDR_SCOPE_LINKLOCAL
)
1060 if (del_timer(&ma
->mca_timer
)) {
1061 atomic_dec(&ma
->mca_refcnt
);
1062 delay
= ma
->mca_timer
.expires
- jiffies
;
1065 if (delay
>= resptime
)
1066 delay
= prandom_u32() % resptime
;
1068 ma
->mca_timer
.expires
= jiffies
+ delay
;
1069 if (!mod_timer(&ma
->mca_timer
, jiffies
+ delay
))
1070 atomic_inc(&ma
->mca_refcnt
);
1071 ma
->mca_flags
|= MAF_TIMER_RUNNING
;
1074 /* mark EXCLUDE-mode sources */
1075 static bool mld_xmarksources(struct ifmcaddr6
*pmc
, int nsrcs
,
1076 const struct in6_addr
*srcs
)
1078 struct ip6_sf_list
*psf
;
1082 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
1083 if (scount
== nsrcs
)
1085 for (i
= 0; i
< nsrcs
; i
++) {
1086 /* skip inactive filters */
1087 if (psf
->sf_count
[MCAST_INCLUDE
] ||
1088 pmc
->mca_sfcount
[MCAST_EXCLUDE
] !=
1089 psf
->sf_count
[MCAST_EXCLUDE
])
1091 if (ipv6_addr_equal(&srcs
[i
], &psf
->sf_addr
)) {
1097 pmc
->mca_flags
&= ~MAF_GSQUERY
;
1098 if (scount
== nsrcs
) /* all sources excluded */
1103 static bool mld_marksources(struct ifmcaddr6
*pmc
, int nsrcs
,
1104 const struct in6_addr
*srcs
)
1106 struct ip6_sf_list
*psf
;
1109 if (pmc
->mca_sfmode
== MCAST_EXCLUDE
)
1110 return mld_xmarksources(pmc
, nsrcs
, srcs
);
1112 /* mark INCLUDE-mode sources */
1115 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
1116 if (scount
== nsrcs
)
1118 for (i
= 0; i
< nsrcs
; i
++) {
1119 if (ipv6_addr_equal(&srcs
[i
], &psf
->sf_addr
)) {
1127 pmc
->mca_flags
&= ~MAF_GSQUERY
;
1130 pmc
->mca_flags
|= MAF_GSQUERY
;
1134 static int mld_force_mld_version(const struct inet6_dev
*idev
)
1136 /* Normally, both are 0 here. If enforcement to a particular is
1137 * being used, individual device enforcement will have a lower
1138 * precedence over 'all' device (.../conf/all/force_mld_version).
1141 if (dev_net(idev
->dev
)->ipv6
.devconf_all
->force_mld_version
!= 0)
1142 return dev_net(idev
->dev
)->ipv6
.devconf_all
->force_mld_version
;
1144 return idev
->cnf
.force_mld_version
;
1147 static bool mld_in_v2_mode_only(const struct inet6_dev
*idev
)
1149 return mld_force_mld_version(idev
) == 2;
1152 static bool mld_in_v1_mode_only(const struct inet6_dev
*idev
)
1154 return mld_force_mld_version(idev
) == 1;
1157 static bool mld_in_v1_mode(const struct inet6_dev
*idev
)
1159 if (mld_in_v2_mode_only(idev
))
1161 if (mld_in_v1_mode_only(idev
))
1163 if (idev
->mc_v1_seen
&& time_before(jiffies
, idev
->mc_v1_seen
))
1169 static void mld_set_v1_mode(struct inet6_dev
*idev
)
1171 /* RFC3810, relevant sections:
1172 * - 9.1. Robustness Variable
1173 * - 9.2. Query Interval
1174 * - 9.3. Query Response Interval
1175 * - 9.12. Older Version Querier Present Timeout
1177 unsigned long switchback
;
1179 switchback
= (idev
->mc_qrv
* idev
->mc_qi
) + idev
->mc_qri
;
1181 idev
->mc_v1_seen
= jiffies
+ switchback
;
1184 static void mld_update_qrv(struct inet6_dev
*idev
,
1185 const struct mld2_query
*mlh2
)
1187 /* RFC3810, relevant sections:
1188 * - 5.1.8. QRV (Querier's Robustness Variable)
1189 * - 9.1. Robustness Variable
1192 /* The value of the Robustness Variable MUST NOT be zero,
1193 * and SHOULD NOT be one. Catch this here if we ever run
1194 * into such a case in future.
1196 const int min_qrv
= min(MLD_QRV_DEFAULT
, sysctl_mld_qrv
);
1197 WARN_ON(idev
->mc_qrv
== 0);
1199 if (mlh2
->mld2q_qrv
> 0)
1200 idev
->mc_qrv
= mlh2
->mld2q_qrv
;
1202 if (unlikely(idev
->mc_qrv
< min_qrv
)) {
1203 net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n",
1204 idev
->mc_qrv
, min_qrv
);
1205 idev
->mc_qrv
= min_qrv
;
1209 static void mld_update_qi(struct inet6_dev
*idev
,
1210 const struct mld2_query
*mlh2
)
1212 /* RFC3810, relevant sections:
1213 * - 5.1.9. QQIC (Querier's Query Interval Code)
1214 * - 9.2. Query Interval
1215 * - 9.12. Older Version Querier Present Timeout
1216 * (the [Query Interval] in the last Query received)
1218 unsigned long mc_qqi
;
1220 if (mlh2
->mld2q_qqic
< 128) {
1221 mc_qqi
= mlh2
->mld2q_qqic
;
1223 unsigned long mc_man
, mc_exp
;
1225 mc_exp
= MLDV2_QQIC_EXP(mlh2
->mld2q_qqic
);
1226 mc_man
= MLDV2_QQIC_MAN(mlh2
->mld2q_qqic
);
1228 mc_qqi
= (mc_man
| 0x10) << (mc_exp
+ 3);
1231 idev
->mc_qi
= mc_qqi
* HZ
;
1234 static void mld_update_qri(struct inet6_dev
*idev
,
1235 const struct mld2_query
*mlh2
)
1237 /* RFC3810, relevant sections:
1238 * - 5.1.3. Maximum Response Code
1239 * - 9.3. Query Response Interval
1241 idev
->mc_qri
= msecs_to_jiffies(mldv2_mrc(mlh2
));
1244 static int mld_process_v1(struct inet6_dev
*idev
, struct mld_msg
*mld
,
1245 unsigned long *max_delay
, bool v1_query
)
1247 unsigned long mldv1_md
;
1249 /* Ignore v1 queries */
1250 if (mld_in_v2_mode_only(idev
))
1253 mldv1_md
= ntohs(mld
->mld_maxdelay
);
1255 /* When in MLDv1 fallback and a MLDv2 router start-up being
1256 * unaware of current MLDv1 operation, the MRC == MRD mapping
1257 * only works when the exponential algorithm is not being
1258 * used (as MLDv1 is unaware of such things).
1260 * According to the RFC author, the MLDv2 implementations
1261 * he's aware of all use a MRC < 32768 on start up queries.
1263 * Thus, should we *ever* encounter something else larger
1264 * than that, just assume the maximum possible within our
1268 mldv1_md
= min(mldv1_md
, MLDV1_MRD_MAX_COMPAT
);
1270 *max_delay
= max(msecs_to_jiffies(mldv1_md
), 1UL);
1272 /* MLDv1 router present: we need to go into v1 mode *only*
1273 * when an MLDv1 query is received as per section 9.12. of
1274 * RFC3810! And we know from RFC2710 section 3.7 that MLDv1
1275 * queries MUST be of exactly 24 octets.
1278 mld_set_v1_mode(idev
);
1280 /* cancel MLDv2 report timer */
1281 mld_gq_stop_timer(idev
);
1282 /* cancel the interface change timer */
1283 mld_ifc_stop_timer(idev
);
1284 /* clear deleted report items */
1285 mld_clear_delrec(idev
);
1290 static int mld_process_v2(struct inet6_dev
*idev
, struct mld2_query
*mld
,
1291 unsigned long *max_delay
)
1293 *max_delay
= max(msecs_to_jiffies(mldv2_mrc(mld
)), 1UL);
1295 mld_update_qrv(idev
, mld
);
1296 mld_update_qi(idev
, mld
);
1297 mld_update_qri(idev
, mld
);
1299 idev
->mc_maxdelay
= *max_delay
;
1304 /* called with rcu_read_lock() */
1305 int igmp6_event_query(struct sk_buff
*skb
)
1307 struct mld2_query
*mlh2
= NULL
;
1308 struct ifmcaddr6
*ma
;
1309 const struct in6_addr
*group
;
1310 unsigned long max_delay
;
1311 struct inet6_dev
*idev
;
1312 struct mld_msg
*mld
;
1317 if (!pskb_may_pull(skb
, sizeof(struct in6_addr
)))
1320 /* compute payload length excluding extension headers */
1321 len
= ntohs(ipv6_hdr(skb
)->payload_len
) + sizeof(struct ipv6hdr
);
1322 len
-= skb_network_header_len(skb
);
1325 * Upon reception of an MLD message that contains a Query, the node
1326 * checks if the source address of the message is a valid link-local
1327 * address, if the Hop Limit is set to 1, and if the Router Alert
1328 * option is present in the Hop-By-Hop Options header of the IPv6
1329 * packet. If any of these checks fails, the packet is dropped.
1331 if (!(ipv6_addr_type(&ipv6_hdr(skb
)->saddr
) & IPV6_ADDR_LINKLOCAL
) ||
1332 ipv6_hdr(skb
)->hop_limit
!= 1 ||
1333 !(IP6CB(skb
)->flags
& IP6SKB_ROUTERALERT
) ||
1334 IP6CB(skb
)->ra
!= htons(IPV6_OPT_ROUTERALERT_MLD
))
1337 idev
= __in6_dev_get(skb
->dev
);
1341 mld
= (struct mld_msg
*)icmp6_hdr(skb
);
1342 group
= &mld
->mld_mca
;
1343 group_type
= ipv6_addr_type(group
);
1345 if (group_type
!= IPV6_ADDR_ANY
&&
1346 !(group_type
&IPV6_ADDR_MULTICAST
))
1349 if (len
< MLD_V1_QUERY_LEN
) {
1351 } else if (len
== MLD_V1_QUERY_LEN
|| mld_in_v1_mode(idev
)) {
1352 err
= mld_process_v1(idev
, mld
, &max_delay
,
1353 len
== MLD_V1_QUERY_LEN
);
1356 } else if (len
>= MLD_V2_QUERY_LEN_MIN
) {
1357 int srcs_offset
= sizeof(struct mld2_query
) -
1358 sizeof(struct icmp6hdr
);
1360 if (!pskb_may_pull(skb
, srcs_offset
))
1363 mlh2
= (struct mld2_query
*)skb_transport_header(skb
);
1365 err
= mld_process_v2(idev
, mlh2
, &max_delay
);
1369 if (group_type
== IPV6_ADDR_ANY
) { /* general query */
1370 if (mlh2
->mld2q_nsrcs
)
1371 return -EINVAL
; /* no sources allowed */
1373 mld_gq_start_timer(idev
);
1376 /* mark sources to include, if group & source-specific */
1377 if (mlh2
->mld2q_nsrcs
!= 0) {
1378 if (!pskb_may_pull(skb
, srcs_offset
+
1379 ntohs(mlh2
->mld2q_nsrcs
) * sizeof(struct in6_addr
)))
1382 mlh2
= (struct mld2_query
*)skb_transport_header(skb
);
1389 read_lock_bh(&idev
->lock
);
1390 if (group_type
== IPV6_ADDR_ANY
) {
1391 for (ma
= idev
->mc_list
; ma
; ma
= ma
->next
) {
1392 spin_lock_bh(&ma
->mca_lock
);
1393 igmp6_group_queried(ma
, max_delay
);
1394 spin_unlock_bh(&ma
->mca_lock
);
1397 for (ma
= idev
->mc_list
; ma
; ma
= ma
->next
) {
1398 if (!ipv6_addr_equal(group
, &ma
->mca_addr
))
1400 spin_lock_bh(&ma
->mca_lock
);
1401 if (ma
->mca_flags
& MAF_TIMER_RUNNING
) {
1402 /* gsquery <- gsquery && mark */
1404 ma
->mca_flags
&= ~MAF_GSQUERY
;
1406 /* gsquery <- mark */
1408 ma
->mca_flags
|= MAF_GSQUERY
;
1410 ma
->mca_flags
&= ~MAF_GSQUERY
;
1412 if (!(ma
->mca_flags
& MAF_GSQUERY
) ||
1413 mld_marksources(ma
, ntohs(mlh2
->mld2q_nsrcs
), mlh2
->mld2q_srcs
))
1414 igmp6_group_queried(ma
, max_delay
);
1415 spin_unlock_bh(&ma
->mca_lock
);
1419 read_unlock_bh(&idev
->lock
);
1424 /* called with rcu_read_lock() */
1425 int igmp6_event_report(struct sk_buff
*skb
)
1427 struct ifmcaddr6
*ma
;
1428 struct inet6_dev
*idev
;
1429 struct mld_msg
*mld
;
1432 /* Our own report looped back. Ignore it. */
1433 if (skb
->pkt_type
== PACKET_LOOPBACK
)
1436 /* send our report if the MC router may not have heard this report */
1437 if (skb
->pkt_type
!= PACKET_MULTICAST
&&
1438 skb
->pkt_type
!= PACKET_BROADCAST
)
1441 if (!pskb_may_pull(skb
, sizeof(*mld
) - sizeof(struct icmp6hdr
)))
1444 mld
= (struct mld_msg
*)icmp6_hdr(skb
);
1446 /* Drop reports with not link local source */
1447 addr_type
= ipv6_addr_type(&ipv6_hdr(skb
)->saddr
);
1448 if (addr_type
!= IPV6_ADDR_ANY
&&
1449 !(addr_type
&IPV6_ADDR_LINKLOCAL
))
1452 idev
= __in6_dev_get(skb
->dev
);
1457 * Cancel the timer for this group
1460 read_lock_bh(&idev
->lock
);
1461 for (ma
= idev
->mc_list
; ma
; ma
= ma
->next
) {
1462 if (ipv6_addr_equal(&ma
->mca_addr
, &mld
->mld_mca
)) {
1463 spin_lock(&ma
->mca_lock
);
1464 if (del_timer(&ma
->mca_timer
))
1465 atomic_dec(&ma
->mca_refcnt
);
1466 ma
->mca_flags
&= ~(MAF_LAST_REPORTER
|MAF_TIMER_RUNNING
);
1467 spin_unlock(&ma
->mca_lock
);
1471 read_unlock_bh(&idev
->lock
);
1475 static bool is_in(struct ifmcaddr6
*pmc
, struct ip6_sf_list
*psf
, int type
,
1476 int gdeleted
, int sdeleted
)
1479 case MLD2_MODE_IS_INCLUDE
:
1480 case MLD2_MODE_IS_EXCLUDE
:
1481 if (gdeleted
|| sdeleted
)
1483 if (!((pmc
->mca_flags
& MAF_GSQUERY
) && !psf
->sf_gsresp
)) {
1484 if (pmc
->mca_sfmode
== MCAST_INCLUDE
)
1486 /* don't include if this source is excluded
1489 if (psf
->sf_count
[MCAST_INCLUDE
])
1490 return type
== MLD2_MODE_IS_INCLUDE
;
1491 return pmc
->mca_sfcount
[MCAST_EXCLUDE
] ==
1492 psf
->sf_count
[MCAST_EXCLUDE
];
1495 case MLD2_CHANGE_TO_INCLUDE
:
1496 if (gdeleted
|| sdeleted
)
1498 return psf
->sf_count
[MCAST_INCLUDE
] != 0;
1499 case MLD2_CHANGE_TO_EXCLUDE
:
1500 if (gdeleted
|| sdeleted
)
1502 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
] == 0 ||
1503 psf
->sf_count
[MCAST_INCLUDE
])
1505 return pmc
->mca_sfcount
[MCAST_EXCLUDE
] ==
1506 psf
->sf_count
[MCAST_EXCLUDE
];
1507 case MLD2_ALLOW_NEW_SOURCES
:
1508 if (gdeleted
|| !psf
->sf_crcount
)
1510 return (pmc
->mca_sfmode
== MCAST_INCLUDE
) ^ sdeleted
;
1511 case MLD2_BLOCK_OLD_SOURCES
:
1512 if (pmc
->mca_sfmode
== MCAST_INCLUDE
)
1513 return gdeleted
|| (psf
->sf_crcount
&& sdeleted
);
1514 return psf
->sf_crcount
&& !gdeleted
&& !sdeleted
;
1520 mld_scount(struct ifmcaddr6
*pmc
, int type
, int gdeleted
, int sdeleted
)
1522 struct ip6_sf_list
*psf
;
1525 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
1526 if (!is_in(pmc
, psf
, type
, gdeleted
, sdeleted
))
1533 static void ip6_mc_hdr(struct sock
*sk
, struct sk_buff
*skb
,
1534 struct net_device
*dev
,
1535 const struct in6_addr
*saddr
,
1536 const struct in6_addr
*daddr
,
1539 struct ipv6hdr
*hdr
;
1541 skb
->protocol
= htons(ETH_P_IPV6
);
1544 skb_reset_network_header(skb
);
1545 skb_put(skb
, sizeof(struct ipv6hdr
));
1546 hdr
= ipv6_hdr(skb
);
1548 ip6_flow_hdr(hdr
, 0, 0);
1550 hdr
->payload_len
= htons(len
);
1551 hdr
->nexthdr
= proto
;
1552 hdr
->hop_limit
= inet6_sk(sk
)->hop_limit
;
1554 hdr
->saddr
= *saddr
;
1555 hdr
->daddr
= *daddr
;
1558 static struct sk_buff
*mld_newpack(struct inet6_dev
*idev
, unsigned int mtu
)
1560 struct net_device
*dev
= idev
->dev
;
1561 struct net
*net
= dev_net(dev
);
1562 struct sock
*sk
= net
->ipv6
.igmp_sk
;
1563 struct sk_buff
*skb
;
1564 struct mld2_report
*pmr
;
1565 struct in6_addr addr_buf
;
1566 const struct in6_addr
*saddr
;
1567 int hlen
= LL_RESERVED_SPACE(dev
);
1568 int tlen
= dev
->needed_tailroom
;
1569 unsigned int size
= mtu
+ hlen
+ tlen
;
1571 u8 ra
[8] = { IPPROTO_ICMPV6
, 0,
1572 IPV6_TLV_ROUTERALERT
, 2, 0, 0,
1575 /* we assume size > sizeof(ra) here */
1576 /* limit our allocations to order-0 page */
1577 size
= min_t(int, size
, SKB_MAX_ORDER(0, 0));
1578 skb
= sock_alloc_send_skb(sk
, size
, 1, &err
);
1583 skb
->priority
= TC_PRIO_CONTROL
;
1584 skb_reserve(skb
, hlen
);
1585 skb_tailroom_reserve(skb
, mtu
, tlen
);
1587 if (__ipv6_get_lladdr(idev
, &addr_buf
, IFA_F_TENTATIVE
)) {
1588 /* <draft-ietf-magma-mld-source-05.txt>:
1589 * use unspecified address as the source address
1590 * when a valid link-local address is not available.
1592 saddr
= &in6addr_any
;
1596 ip6_mc_hdr(sk
, skb
, dev
, saddr
, &mld2_all_mcr
, NEXTHDR_HOP
, 0);
1598 memcpy(skb_put(skb
, sizeof(ra
)), ra
, sizeof(ra
));
1600 skb_set_transport_header(skb
, skb_tail_pointer(skb
) - skb
->data
);
1601 skb_put(skb
, sizeof(*pmr
));
1602 pmr
= (struct mld2_report
*)skb_transport_header(skb
);
1603 pmr
->mld2r_type
= ICMPV6_MLD2_REPORT
;
1604 pmr
->mld2r_resv1
= 0;
1605 pmr
->mld2r_cksum
= 0;
1606 pmr
->mld2r_resv2
= 0;
1607 pmr
->mld2r_ngrec
= 0;
1611 static void mld_sendpack(struct sk_buff
*skb
)
1613 struct ipv6hdr
*pip6
= ipv6_hdr(skb
);
1614 struct mld2_report
*pmr
=
1615 (struct mld2_report
*)skb_transport_header(skb
);
1616 int payload_len
, mldlen
;
1617 struct inet6_dev
*idev
;
1618 struct net
*net
= dev_net(skb
->dev
);
1621 struct dst_entry
*dst
;
1624 idev
= __in6_dev_get(skb
->dev
);
1625 IP6_UPD_PO_STATS(net
, idev
, IPSTATS_MIB_OUT
, skb
->len
);
1627 payload_len
= (skb_tail_pointer(skb
) - skb_network_header(skb
)) -
1629 mldlen
= skb_tail_pointer(skb
) - skb_transport_header(skb
);
1630 pip6
->payload_len
= htons(payload_len
);
1632 pmr
->mld2r_cksum
= csum_ipv6_magic(&pip6
->saddr
, &pip6
->daddr
, mldlen
,
1634 csum_partial(skb_transport_header(skb
),
1637 icmpv6_flow_init(net
->ipv6
.igmp_sk
, &fl6
, ICMPV6_MLD2_REPORT
,
1638 &ipv6_hdr(skb
)->saddr
, &ipv6_hdr(skb
)->daddr
,
1640 dst
= icmp6_dst_alloc(skb
->dev
, &fl6
);
1647 skb_dst_set(skb
, dst
);
1651 payload_len
= skb
->len
;
1653 err
= NF_HOOK(NFPROTO_IPV6
, NF_INET_LOCAL_OUT
,
1654 net
, net
->ipv6
.igmp_sk
, skb
, NULL
, skb
->dev
,
1658 ICMP6MSGOUT_INC_STATS(net
, idev
, ICMPV6_MLD2_REPORT
);
1659 ICMP6_INC_STATS(net
, idev
, ICMP6_MIB_OUTMSGS
);
1661 IP6_INC_STATS(net
, idev
, IPSTATS_MIB_OUTDISCARDS
);
1672 static int grec_size(struct ifmcaddr6
*pmc
, int type
, int gdel
, int sdel
)
1674 return sizeof(struct mld2_grec
) + 16 * mld_scount(pmc
,type
,gdel
,sdel
);
1677 static struct sk_buff
*add_grhead(struct sk_buff
*skb
, struct ifmcaddr6
*pmc
,
1678 int type
, struct mld2_grec
**ppgr
)
1680 struct net_device
*dev
= pmc
->idev
->dev
;
1681 struct mld2_report
*pmr
;
1682 struct mld2_grec
*pgr
;
1685 skb
= mld_newpack(pmc
->idev
, dev
->mtu
);
1688 pgr
= (struct mld2_grec
*)skb_put(skb
, sizeof(struct mld2_grec
));
1689 pgr
->grec_type
= type
;
1690 pgr
->grec_auxwords
= 0;
1691 pgr
->grec_nsrcs
= 0;
1692 pgr
->grec_mca
= pmc
->mca_addr
; /* structure copy */
1693 pmr
= (struct mld2_report
*)skb_transport_header(skb
);
1694 pmr
->mld2r_ngrec
= htons(ntohs(pmr
->mld2r_ngrec
)+1);
1699 #define AVAILABLE(skb) ((skb) ? skb_availroom(skb) : 0)
1701 static struct sk_buff
*add_grec(struct sk_buff
*skb
, struct ifmcaddr6
*pmc
,
1702 int type
, int gdeleted
, int sdeleted
, int crsend
)
1704 struct inet6_dev
*idev
= pmc
->idev
;
1705 struct net_device
*dev
= idev
->dev
;
1706 struct mld2_report
*pmr
;
1707 struct mld2_grec
*pgr
= NULL
;
1708 struct ip6_sf_list
*psf
, *psf_next
, *psf_prev
, **psf_list
;
1709 int scount
, stotal
, first
, isquery
, truncate
;
1711 if (pmc
->mca_flags
& MAF_NOREPORT
)
1714 isquery
= type
== MLD2_MODE_IS_INCLUDE
||
1715 type
== MLD2_MODE_IS_EXCLUDE
;
1716 truncate
= type
== MLD2_MODE_IS_EXCLUDE
||
1717 type
== MLD2_CHANGE_TO_EXCLUDE
;
1719 stotal
= scount
= 0;
1721 psf_list
= sdeleted
? &pmc
->mca_tomb
: &pmc
->mca_sources
;
1726 pmr
= skb
? (struct mld2_report
*)skb_transport_header(skb
) : NULL
;
1728 /* EX and TO_EX get a fresh packet, if needed */
1730 if (pmr
&& pmr
->mld2r_ngrec
&&
1731 AVAILABLE(skb
) < grec_size(pmc
, type
, gdeleted
, sdeleted
)) {
1734 skb
= mld_newpack(idev
, dev
->mtu
);
1739 for (psf
= *psf_list
; psf
; psf
= psf_next
) {
1740 struct in6_addr
*psrc
;
1742 psf_next
= psf
->sf_next
;
1744 if (!is_in(pmc
, psf
, type
, gdeleted
, sdeleted
)) {
1749 /* Based on RFC3810 6.1. Should not send source-list change
1750 * records when there is a filter mode change.
1752 if (((gdeleted
&& pmc
->mca_sfmode
== MCAST_EXCLUDE
) ||
1753 (!gdeleted
&& pmc
->mca_crcount
)) &&
1754 (type
== MLD2_ALLOW_NEW_SOURCES
||
1755 type
== MLD2_BLOCK_OLD_SOURCES
) && psf
->sf_crcount
)
1756 goto decrease_sf_crcount
;
1758 /* clear marks on query responses */
1762 if (AVAILABLE(skb
) < sizeof(*psrc
) +
1763 first
*sizeof(struct mld2_grec
)) {
1764 if (truncate
&& !first
)
1765 break; /* truncate these */
1767 pgr
->grec_nsrcs
= htons(scount
);
1770 skb
= mld_newpack(idev
, dev
->mtu
);
1775 skb
= add_grhead(skb
, pmc
, type
, &pgr
);
1780 psrc
= (struct in6_addr
*)skb_put(skb
, sizeof(*psrc
));
1781 *psrc
= psf
->sf_addr
;
1783 if ((type
== MLD2_ALLOW_NEW_SOURCES
||
1784 type
== MLD2_BLOCK_OLD_SOURCES
) && psf
->sf_crcount
) {
1785 decrease_sf_crcount
:
1787 if ((sdeleted
|| gdeleted
) && psf
->sf_crcount
== 0) {
1789 psf_prev
->sf_next
= psf
->sf_next
;
1791 *psf_list
= psf
->sf_next
;
1801 if (type
== MLD2_ALLOW_NEW_SOURCES
||
1802 type
== MLD2_BLOCK_OLD_SOURCES
)
1804 if (pmc
->mca_crcount
|| isquery
|| crsend
) {
1805 /* make sure we have room for group header */
1806 if (skb
&& AVAILABLE(skb
) < sizeof(struct mld2_grec
)) {
1808 skb
= NULL
; /* add_grhead will get a new one */
1810 skb
= add_grhead(skb
, pmc
, type
, &pgr
);
1814 pgr
->grec_nsrcs
= htons(scount
);
1817 pmc
->mca_flags
&= ~MAF_GSQUERY
; /* clear query state */
1821 static void mld_send_report(struct inet6_dev
*idev
, struct ifmcaddr6
*pmc
)
1823 struct sk_buff
*skb
= NULL
;
1826 read_lock_bh(&idev
->lock
);
1828 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
) {
1829 if (pmc
->mca_flags
& MAF_NOREPORT
)
1831 spin_lock_bh(&pmc
->mca_lock
);
1832 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
])
1833 type
= MLD2_MODE_IS_EXCLUDE
;
1835 type
= MLD2_MODE_IS_INCLUDE
;
1836 skb
= add_grec(skb
, pmc
, type
, 0, 0, 0);
1837 spin_unlock_bh(&pmc
->mca_lock
);
1840 spin_lock_bh(&pmc
->mca_lock
);
1841 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
])
1842 type
= MLD2_MODE_IS_EXCLUDE
;
1844 type
= MLD2_MODE_IS_INCLUDE
;
1845 skb
= add_grec(skb
, pmc
, type
, 0, 0, 0);
1846 spin_unlock_bh(&pmc
->mca_lock
);
1848 read_unlock_bh(&idev
->lock
);
1854 * remove zero-count source records from a source filter list
1856 static void mld_clear_zeros(struct ip6_sf_list
**ppsf
)
1858 struct ip6_sf_list
*psf_prev
, *psf_next
, *psf
;
1861 for (psf
= *ppsf
; psf
; psf
= psf_next
) {
1862 psf_next
= psf
->sf_next
;
1863 if (psf
->sf_crcount
== 0) {
1865 psf_prev
->sf_next
= psf
->sf_next
;
1867 *ppsf
= psf
->sf_next
;
1874 static void mld_send_cr(struct inet6_dev
*idev
)
1876 struct ifmcaddr6
*pmc
, *pmc_prev
, *pmc_next
;
1877 struct sk_buff
*skb
= NULL
;
1880 read_lock_bh(&idev
->lock
);
1881 spin_lock(&idev
->mc_lock
);
1885 for (pmc
= idev
->mc_tomb
; pmc
; pmc
= pmc_next
) {
1886 pmc_next
= pmc
->next
;
1887 if (pmc
->mca_sfmode
== MCAST_INCLUDE
) {
1888 type
= MLD2_BLOCK_OLD_SOURCES
;
1889 dtype
= MLD2_BLOCK_OLD_SOURCES
;
1890 skb
= add_grec(skb
, pmc
, type
, 1, 0, 0);
1891 skb
= add_grec(skb
, pmc
, dtype
, 1, 1, 0);
1893 if (pmc
->mca_crcount
) {
1894 if (pmc
->mca_sfmode
== MCAST_EXCLUDE
) {
1895 type
= MLD2_CHANGE_TO_INCLUDE
;
1896 skb
= add_grec(skb
, pmc
, type
, 1, 0, 0);
1899 if (pmc
->mca_crcount
== 0) {
1900 mld_clear_zeros(&pmc
->mca_tomb
);
1901 mld_clear_zeros(&pmc
->mca_sources
);
1904 if (pmc
->mca_crcount
== 0 && !pmc
->mca_tomb
&&
1905 !pmc
->mca_sources
) {
1907 pmc_prev
->next
= pmc_next
;
1909 idev
->mc_tomb
= pmc_next
;
1910 in6_dev_put(pmc
->idev
);
1915 spin_unlock(&idev
->mc_lock
);
1918 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
) {
1919 spin_lock_bh(&pmc
->mca_lock
);
1920 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
]) {
1921 type
= MLD2_BLOCK_OLD_SOURCES
;
1922 dtype
= MLD2_ALLOW_NEW_SOURCES
;
1924 type
= MLD2_ALLOW_NEW_SOURCES
;
1925 dtype
= MLD2_BLOCK_OLD_SOURCES
;
1927 skb
= add_grec(skb
, pmc
, type
, 0, 0, 0);
1928 skb
= add_grec(skb
, pmc
, dtype
, 0, 1, 0); /* deleted sources */
1930 /* filter mode changes */
1931 if (pmc
->mca_crcount
) {
1932 if (pmc
->mca_sfmode
== MCAST_EXCLUDE
)
1933 type
= MLD2_CHANGE_TO_EXCLUDE
;
1935 type
= MLD2_CHANGE_TO_INCLUDE
;
1936 skb
= add_grec(skb
, pmc
, type
, 0, 0, 0);
1939 spin_unlock_bh(&pmc
->mca_lock
);
1941 read_unlock_bh(&idev
->lock
);
1944 (void) mld_sendpack(skb
);
1947 static void igmp6_send(struct in6_addr
*addr
, struct net_device
*dev
, int type
)
1949 struct net
*net
= dev_net(dev
);
1950 struct sock
*sk
= net
->ipv6
.igmp_sk
;
1951 struct inet6_dev
*idev
;
1952 struct sk_buff
*skb
;
1953 struct mld_msg
*hdr
;
1954 const struct in6_addr
*snd_addr
, *saddr
;
1955 struct in6_addr addr_buf
;
1956 int hlen
= LL_RESERVED_SPACE(dev
);
1957 int tlen
= dev
->needed_tailroom
;
1958 int err
, len
, payload_len
, full_len
;
1959 u8 ra
[8] = { IPPROTO_ICMPV6
, 0,
1960 IPV6_TLV_ROUTERALERT
, 2, 0, 0,
1963 struct dst_entry
*dst
;
1965 if (type
== ICMPV6_MGM_REDUCTION
)
1966 snd_addr
= &in6addr_linklocal_allrouters
;
1970 len
= sizeof(struct icmp6hdr
) + sizeof(struct in6_addr
);
1971 payload_len
= len
+ sizeof(ra
);
1972 full_len
= sizeof(struct ipv6hdr
) + payload_len
;
1975 IP6_UPD_PO_STATS(net
, __in6_dev_get(dev
),
1976 IPSTATS_MIB_OUT
, full_len
);
1979 skb
= sock_alloc_send_skb(sk
, hlen
+ tlen
+ full_len
, 1, &err
);
1983 IP6_INC_STATS(net
, __in6_dev_get(dev
),
1984 IPSTATS_MIB_OUTDISCARDS
);
1988 skb
->priority
= TC_PRIO_CONTROL
;
1989 skb_reserve(skb
, hlen
);
1991 if (ipv6_get_lladdr(dev
, &addr_buf
, IFA_F_TENTATIVE
)) {
1992 /* <draft-ietf-magma-mld-source-05.txt>:
1993 * use unspecified address as the source address
1994 * when a valid link-local address is not available.
1996 saddr
= &in6addr_any
;
2000 ip6_mc_hdr(sk
, skb
, dev
, saddr
, snd_addr
, NEXTHDR_HOP
, payload_len
);
2002 memcpy(skb_put(skb
, sizeof(ra
)), ra
, sizeof(ra
));
2004 hdr
= (struct mld_msg
*) skb_put(skb
, sizeof(struct mld_msg
));
2005 memset(hdr
, 0, sizeof(struct mld_msg
));
2006 hdr
->mld_type
= type
;
2007 hdr
->mld_mca
= *addr
;
2009 hdr
->mld_cksum
= csum_ipv6_magic(saddr
, snd_addr
, len
,
2011 csum_partial(hdr
, len
, 0));
2014 idev
= __in6_dev_get(skb
->dev
);
2016 icmpv6_flow_init(sk
, &fl6
, type
,
2017 &ipv6_hdr(skb
)->saddr
, &ipv6_hdr(skb
)->daddr
,
2019 dst
= icmp6_dst_alloc(skb
->dev
, &fl6
);
2025 skb_dst_set(skb
, dst
);
2026 err
= NF_HOOK(NFPROTO_IPV6
, NF_INET_LOCAL_OUT
,
2027 net
, sk
, skb
, NULL
, skb
->dev
,
2031 ICMP6MSGOUT_INC_STATS(net
, idev
, type
);
2032 ICMP6_INC_STATS(net
, idev
, ICMP6_MIB_OUTMSGS
);
2034 IP6_INC_STATS(net
, idev
, IPSTATS_MIB_OUTDISCARDS
);
2044 static void mld_send_initial_cr(struct inet6_dev
*idev
)
2046 struct sk_buff
*skb
;
2047 struct ifmcaddr6
*pmc
;
2050 if (mld_in_v1_mode(idev
))
2054 read_lock_bh(&idev
->lock
);
2055 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
) {
2056 spin_lock_bh(&pmc
->mca_lock
);
2057 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
])
2058 type
= MLD2_CHANGE_TO_EXCLUDE
;
2060 type
= MLD2_CHANGE_TO_INCLUDE
;
2061 skb
= add_grec(skb
, pmc
, type
, 0, 0, 1);
2062 spin_unlock_bh(&pmc
->mca_lock
);
2064 read_unlock_bh(&idev
->lock
);
2069 void ipv6_mc_dad_complete(struct inet6_dev
*idev
)
2071 idev
->mc_dad_count
= idev
->mc_qrv
;
2072 if (idev
->mc_dad_count
) {
2073 mld_send_initial_cr(idev
);
2074 idev
->mc_dad_count
--;
2075 if (idev
->mc_dad_count
)
2076 mld_dad_start_timer(idev
, idev
->mc_maxdelay
);
2080 static void mld_dad_timer_expire(unsigned long data
)
2082 struct inet6_dev
*idev
= (struct inet6_dev
*)data
;
2084 mld_send_initial_cr(idev
);
2085 if (idev
->mc_dad_count
) {
2086 idev
->mc_dad_count
--;
2087 if (idev
->mc_dad_count
)
2088 mld_dad_start_timer(idev
, idev
->mc_maxdelay
);
2093 static int ip6_mc_del1_src(struct ifmcaddr6
*pmc
, int sfmode
,
2094 const struct in6_addr
*psfsrc
)
2096 struct ip6_sf_list
*psf
, *psf_prev
;
2100 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
2101 if (ipv6_addr_equal(&psf
->sf_addr
, psfsrc
))
2105 if (!psf
|| psf
->sf_count
[sfmode
] == 0) {
2106 /* source filter not found, or count wrong => bug */
2109 psf
->sf_count
[sfmode
]--;
2110 if (!psf
->sf_count
[MCAST_INCLUDE
] && !psf
->sf_count
[MCAST_EXCLUDE
]) {
2111 struct inet6_dev
*idev
= pmc
->idev
;
2113 /* no more filters for this source */
2115 psf_prev
->sf_next
= psf
->sf_next
;
2117 pmc
->mca_sources
= psf
->sf_next
;
2118 if (psf
->sf_oldin
&& !(pmc
->mca_flags
& MAF_NOREPORT
) &&
2119 !mld_in_v1_mode(idev
)) {
2120 psf
->sf_crcount
= idev
->mc_qrv
;
2121 psf
->sf_next
= pmc
->mca_tomb
;
2122 pmc
->mca_tomb
= psf
;
2130 static int ip6_mc_del_src(struct inet6_dev
*idev
, const struct in6_addr
*pmca
,
2131 int sfmode
, int sfcount
, const struct in6_addr
*psfsrc
,
2134 struct ifmcaddr6
*pmc
;
2140 read_lock_bh(&idev
->lock
);
2141 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
) {
2142 if (ipv6_addr_equal(pmca
, &pmc
->mca_addr
))
2146 /* MCA not found?? bug */
2147 read_unlock_bh(&idev
->lock
);
2150 spin_lock_bh(&pmc
->mca_lock
);
2153 if (!pmc
->mca_sfcount
[sfmode
]) {
2154 spin_unlock_bh(&pmc
->mca_lock
);
2155 read_unlock_bh(&idev
->lock
);
2158 pmc
->mca_sfcount
[sfmode
]--;
2161 for (i
= 0; i
< sfcount
; i
++) {
2162 int rv
= ip6_mc_del1_src(pmc
, sfmode
, &psfsrc
[i
]);
2164 changerec
|= rv
> 0;
2168 if (pmc
->mca_sfmode
== MCAST_EXCLUDE
&&
2169 pmc
->mca_sfcount
[MCAST_EXCLUDE
] == 0 &&
2170 pmc
->mca_sfcount
[MCAST_INCLUDE
]) {
2171 struct ip6_sf_list
*psf
;
2173 /* filter mode change */
2174 pmc
->mca_sfmode
= MCAST_INCLUDE
;
2175 pmc
->mca_crcount
= idev
->mc_qrv
;
2176 idev
->mc_ifc_count
= pmc
->mca_crcount
;
2177 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
)
2178 psf
->sf_crcount
= 0;
2179 mld_ifc_event(pmc
->idev
);
2180 } else if (sf_setstate(pmc
) || changerec
)
2181 mld_ifc_event(pmc
->idev
);
2182 spin_unlock_bh(&pmc
->mca_lock
);
2183 read_unlock_bh(&idev
->lock
);
2188 * Add multicast single-source filter to the interface list
2190 static int ip6_mc_add1_src(struct ifmcaddr6
*pmc
, int sfmode
,
2191 const struct in6_addr
*psfsrc
)
2193 struct ip6_sf_list
*psf
, *psf_prev
;
2196 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
2197 if (ipv6_addr_equal(&psf
->sf_addr
, psfsrc
))
2202 psf
= kzalloc(sizeof(*psf
), GFP_ATOMIC
);
2206 psf
->sf_addr
= *psfsrc
;
2208 psf_prev
->sf_next
= psf
;
2210 pmc
->mca_sources
= psf
;
2212 psf
->sf_count
[sfmode
]++;
2216 static void sf_markstate(struct ifmcaddr6
*pmc
)
2218 struct ip6_sf_list
*psf
;
2219 int mca_xcount
= pmc
->mca_sfcount
[MCAST_EXCLUDE
];
2221 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
)
2222 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
]) {
2223 psf
->sf_oldin
= mca_xcount
==
2224 psf
->sf_count
[MCAST_EXCLUDE
] &&
2225 !psf
->sf_count
[MCAST_INCLUDE
];
2227 psf
->sf_oldin
= psf
->sf_count
[MCAST_INCLUDE
] != 0;
2230 static int sf_setstate(struct ifmcaddr6
*pmc
)
2232 struct ip6_sf_list
*psf
, *dpsf
;
2233 int mca_xcount
= pmc
->mca_sfcount
[MCAST_EXCLUDE
];
2234 int qrv
= pmc
->idev
->mc_qrv
;
2238 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
2239 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
]) {
2240 new_in
= mca_xcount
== psf
->sf_count
[MCAST_EXCLUDE
] &&
2241 !psf
->sf_count
[MCAST_INCLUDE
];
2243 new_in
= psf
->sf_count
[MCAST_INCLUDE
] != 0;
2245 if (!psf
->sf_oldin
) {
2246 struct ip6_sf_list
*prev
= NULL
;
2248 for (dpsf
= pmc
->mca_tomb
; dpsf
;
2249 dpsf
= dpsf
->sf_next
) {
2250 if (ipv6_addr_equal(&dpsf
->sf_addr
,
2257 prev
->sf_next
= dpsf
->sf_next
;
2259 pmc
->mca_tomb
= dpsf
->sf_next
;
2262 psf
->sf_crcount
= qrv
;
2265 } else if (psf
->sf_oldin
) {
2266 psf
->sf_crcount
= 0;
2268 * add or update "delete" records if an active filter
2271 for (dpsf
= pmc
->mca_tomb
; dpsf
; dpsf
= dpsf
->sf_next
)
2272 if (ipv6_addr_equal(&dpsf
->sf_addr
,
2276 dpsf
= kmalloc(sizeof(*dpsf
), GFP_ATOMIC
);
2280 /* pmc->mca_lock held by callers */
2281 dpsf
->sf_next
= pmc
->mca_tomb
;
2282 pmc
->mca_tomb
= dpsf
;
2284 dpsf
->sf_crcount
= qrv
;
2292 * Add multicast source filter list to the interface list
2294 static int ip6_mc_add_src(struct inet6_dev
*idev
, const struct in6_addr
*pmca
,
2295 int sfmode
, int sfcount
, const struct in6_addr
*psfsrc
,
2298 struct ifmcaddr6
*pmc
;
2304 read_lock_bh(&idev
->lock
);
2305 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
) {
2306 if (ipv6_addr_equal(pmca
, &pmc
->mca_addr
))
2310 /* MCA not found?? bug */
2311 read_unlock_bh(&idev
->lock
);
2314 spin_lock_bh(&pmc
->mca_lock
);
2317 isexclude
= pmc
->mca_sfmode
== MCAST_EXCLUDE
;
2319 pmc
->mca_sfcount
[sfmode
]++;
2321 for (i
= 0; i
< sfcount
; i
++) {
2322 err
= ip6_mc_add1_src(pmc
, sfmode
, &psfsrc
[i
]);
2330 pmc
->mca_sfcount
[sfmode
]--;
2331 for (j
= 0; j
< i
; j
++)
2332 ip6_mc_del1_src(pmc
, sfmode
, &psfsrc
[j
]);
2333 } else if (isexclude
!= (pmc
->mca_sfcount
[MCAST_EXCLUDE
] != 0)) {
2334 struct ip6_sf_list
*psf
;
2336 /* filter mode change */
2337 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
])
2338 pmc
->mca_sfmode
= MCAST_EXCLUDE
;
2339 else if (pmc
->mca_sfcount
[MCAST_INCLUDE
])
2340 pmc
->mca_sfmode
= MCAST_INCLUDE
;
2341 /* else no filters; keep old mode for reports */
2343 pmc
->mca_crcount
= idev
->mc_qrv
;
2344 idev
->mc_ifc_count
= pmc
->mca_crcount
;
2345 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
)
2346 psf
->sf_crcount
= 0;
2347 mld_ifc_event(idev
);
2348 } else if (sf_setstate(pmc
))
2349 mld_ifc_event(idev
);
2350 spin_unlock_bh(&pmc
->mca_lock
);
2351 read_unlock_bh(&idev
->lock
);
2355 static void ip6_mc_clear_src(struct ifmcaddr6
*pmc
)
2357 struct ip6_sf_list
*psf
, *nextpsf
;
2359 for (psf
= pmc
->mca_tomb
; psf
; psf
= nextpsf
) {
2360 nextpsf
= psf
->sf_next
;
2363 pmc
->mca_tomb
= NULL
;
2364 for (psf
= pmc
->mca_sources
; psf
; psf
= nextpsf
) {
2365 nextpsf
= psf
->sf_next
;
2368 pmc
->mca_sources
= NULL
;
2369 pmc
->mca_sfmode
= MCAST_EXCLUDE
;
2370 pmc
->mca_sfcount
[MCAST_INCLUDE
] = 0;
2371 pmc
->mca_sfcount
[MCAST_EXCLUDE
] = 1;
2375 static void igmp6_join_group(struct ifmcaddr6
*ma
)
2377 unsigned long delay
;
2379 if (ma
->mca_flags
& MAF_NOREPORT
)
2382 igmp6_send(&ma
->mca_addr
, ma
->idev
->dev
, ICMPV6_MGM_REPORT
);
2384 delay
= prandom_u32() % unsolicited_report_interval(ma
->idev
);
2386 spin_lock_bh(&ma
->mca_lock
);
2387 if (del_timer(&ma
->mca_timer
)) {
2388 atomic_dec(&ma
->mca_refcnt
);
2389 delay
= ma
->mca_timer
.expires
- jiffies
;
2392 if (!mod_timer(&ma
->mca_timer
, jiffies
+ delay
))
2393 atomic_inc(&ma
->mca_refcnt
);
2394 ma
->mca_flags
|= MAF_TIMER_RUNNING
| MAF_LAST_REPORTER
;
2395 spin_unlock_bh(&ma
->mca_lock
);
2398 static int ip6_mc_leave_src(struct sock
*sk
, struct ipv6_mc_socklist
*iml
,
2399 struct inet6_dev
*idev
)
2403 /* callers have the socket lock and rtnl lock
2404 * so no other readers or writers of iml or its sflist
2407 /* any-source empty exclude case */
2408 return ip6_mc_del_src(idev
, &iml
->addr
, iml
->sfmode
, 0, NULL
, 0);
2410 err
= ip6_mc_del_src(idev
, &iml
->addr
, iml
->sfmode
,
2411 iml
->sflist
->sl_count
, iml
->sflist
->sl_addr
, 0);
2412 sock_kfree_s(sk
, iml
->sflist
, IP6_SFLSIZE(iml
->sflist
->sl_max
));
2417 static void igmp6_leave_group(struct ifmcaddr6
*ma
)
2419 if (mld_in_v1_mode(ma
->idev
)) {
2420 if (ma
->mca_flags
& MAF_LAST_REPORTER
)
2421 igmp6_send(&ma
->mca_addr
, ma
->idev
->dev
,
2422 ICMPV6_MGM_REDUCTION
);
2424 mld_add_delrec(ma
->idev
, ma
);
2425 mld_ifc_event(ma
->idev
);
2429 static void mld_gq_timer_expire(unsigned long data
)
2431 struct inet6_dev
*idev
= (struct inet6_dev
*)data
;
2433 idev
->mc_gq_running
= 0;
2434 mld_send_report(idev
, NULL
);
2438 static void mld_ifc_timer_expire(unsigned long data
)
2440 struct inet6_dev
*idev
= (struct inet6_dev
*)data
;
2443 if (idev
->mc_ifc_count
) {
2444 idev
->mc_ifc_count
--;
2445 if (idev
->mc_ifc_count
)
2446 mld_ifc_start_timer(idev
, idev
->mc_maxdelay
);
2451 static void mld_ifc_event(struct inet6_dev
*idev
)
2453 if (mld_in_v1_mode(idev
))
2455 idev
->mc_ifc_count
= idev
->mc_qrv
;
2456 mld_ifc_start_timer(idev
, 1);
2460 static void igmp6_timer_handler(unsigned long data
)
2462 struct ifmcaddr6
*ma
= (struct ifmcaddr6
*) data
;
2464 if (mld_in_v1_mode(ma
->idev
))
2465 igmp6_send(&ma
->mca_addr
, ma
->idev
->dev
, ICMPV6_MGM_REPORT
);
2467 mld_send_report(ma
->idev
, ma
);
2469 spin_lock(&ma
->mca_lock
);
2470 ma
->mca_flags
|= MAF_LAST_REPORTER
;
2471 ma
->mca_flags
&= ~MAF_TIMER_RUNNING
;
2472 spin_unlock(&ma
->mca_lock
);
2476 /* Device changing type */
2478 void ipv6_mc_unmap(struct inet6_dev
*idev
)
2480 struct ifmcaddr6
*i
;
2482 /* Install multicast list, except for all-nodes (already installed) */
2484 read_lock_bh(&idev
->lock
);
2485 for (i
= idev
->mc_list
; i
; i
= i
->next
)
2486 igmp6_group_dropped(i
);
2487 read_unlock_bh(&idev
->lock
);
2490 void ipv6_mc_remap(struct inet6_dev
*idev
)
2495 /* Device going down */
2497 void ipv6_mc_down(struct inet6_dev
*idev
)
2499 struct ifmcaddr6
*i
;
2501 /* Withdraw multicast list */
2503 read_lock_bh(&idev
->lock
);
2504 mld_ifc_stop_timer(idev
);
2505 mld_gq_stop_timer(idev
);
2506 mld_dad_stop_timer(idev
);
2508 for (i
= idev
->mc_list
; i
; i
= i
->next
)
2509 igmp6_group_dropped(i
);
2510 read_unlock_bh(&idev
->lock
);
2512 mld_clear_delrec(idev
);
2515 static void ipv6_mc_reset(struct inet6_dev
*idev
)
2517 idev
->mc_qrv
= sysctl_mld_qrv
;
2518 idev
->mc_qi
= MLD_QI_DEFAULT
;
2519 idev
->mc_qri
= MLD_QRI_DEFAULT
;
2520 idev
->mc_v1_seen
= 0;
2521 idev
->mc_maxdelay
= unsolicited_report_interval(idev
);
2524 /* Device going up */
2526 void ipv6_mc_up(struct inet6_dev
*idev
)
2528 struct ifmcaddr6
*i
;
2530 /* Install multicast list, except for all-nodes (already installed) */
2532 read_lock_bh(&idev
->lock
);
2533 ipv6_mc_reset(idev
);
2534 for (i
= idev
->mc_list
; i
; i
= i
->next
)
2535 igmp6_group_added(i
);
2536 read_unlock_bh(&idev
->lock
);
2539 /* IPv6 device initialization. */
2541 void ipv6_mc_init_dev(struct inet6_dev
*idev
)
2543 write_lock_bh(&idev
->lock
);
2544 spin_lock_init(&idev
->mc_lock
);
2545 idev
->mc_gq_running
= 0;
2546 setup_timer(&idev
->mc_gq_timer
, mld_gq_timer_expire
,
2547 (unsigned long)idev
);
2548 idev
->mc_tomb
= NULL
;
2549 idev
->mc_ifc_count
= 0;
2550 setup_timer(&idev
->mc_ifc_timer
, mld_ifc_timer_expire
,
2551 (unsigned long)idev
);
2552 setup_timer(&idev
->mc_dad_timer
, mld_dad_timer_expire
,
2553 (unsigned long)idev
);
2554 ipv6_mc_reset(idev
);
2555 write_unlock_bh(&idev
->lock
);
2559 * Device is about to be destroyed: clean up.
2562 void ipv6_mc_destroy_dev(struct inet6_dev
*idev
)
2564 struct ifmcaddr6
*i
;
2566 /* Deactivate timers */
2569 /* Delete all-nodes address. */
2570 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2571 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2574 __ipv6_dev_mc_dec(idev
, &in6addr_linklocal_allnodes
);
2576 if (idev
->cnf
.forwarding
)
2577 __ipv6_dev_mc_dec(idev
, &in6addr_linklocal_allrouters
);
2579 write_lock_bh(&idev
->lock
);
2580 while ((i
= idev
->mc_list
) != NULL
) {
2581 idev
->mc_list
= i
->next
;
2582 write_unlock_bh(&idev
->lock
);
2584 igmp6_group_dropped(i
);
2587 write_lock_bh(&idev
->lock
);
2589 write_unlock_bh(&idev
->lock
);
2592 #ifdef CONFIG_PROC_FS
2593 struct igmp6_mc_iter_state
{
2594 struct seq_net_private p
;
2595 struct net_device
*dev
;
2596 struct inet6_dev
*idev
;
2599 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2601 static inline struct ifmcaddr6
*igmp6_mc_get_first(struct seq_file
*seq
)
2603 struct ifmcaddr6
*im
= NULL
;
2604 struct igmp6_mc_iter_state
*state
= igmp6_mc_seq_private(seq
);
2605 struct net
*net
= seq_file_net(seq
);
2608 for_each_netdev_rcu(net
, state
->dev
) {
2609 struct inet6_dev
*idev
;
2610 idev
= __in6_dev_get(state
->dev
);
2613 read_lock_bh(&idev
->lock
);
2619 read_unlock_bh(&idev
->lock
);
2624 static struct ifmcaddr6
*igmp6_mc_get_next(struct seq_file
*seq
, struct ifmcaddr6
*im
)
2626 struct igmp6_mc_iter_state
*state
= igmp6_mc_seq_private(seq
);
2630 if (likely(state
->idev
))
2631 read_unlock_bh(&state
->idev
->lock
);
2633 state
->dev
= next_net_device_rcu(state
->dev
);
2638 state
->idev
= __in6_dev_get(state
->dev
);
2641 read_lock_bh(&state
->idev
->lock
);
2642 im
= state
->idev
->mc_list
;
2647 static struct ifmcaddr6
*igmp6_mc_get_idx(struct seq_file
*seq
, loff_t pos
)
2649 struct ifmcaddr6
*im
= igmp6_mc_get_first(seq
);
2651 while (pos
&& (im
= igmp6_mc_get_next(seq
, im
)) != NULL
)
2653 return pos
? NULL
: im
;
2656 static void *igmp6_mc_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2660 return igmp6_mc_get_idx(seq
, *pos
);
2663 static void *igmp6_mc_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2665 struct ifmcaddr6
*im
= igmp6_mc_get_next(seq
, v
);
2671 static void igmp6_mc_seq_stop(struct seq_file
*seq
, void *v
)
2674 struct igmp6_mc_iter_state
*state
= igmp6_mc_seq_private(seq
);
2676 if (likely(state
->idev
)) {
2677 read_unlock_bh(&state
->idev
->lock
);
2684 static int igmp6_mc_seq_show(struct seq_file
*seq
, void *v
)
2686 struct ifmcaddr6
*im
= (struct ifmcaddr6
*)v
;
2687 struct igmp6_mc_iter_state
*state
= igmp6_mc_seq_private(seq
);
2690 "%-4d %-15s %pi6 %5d %08X %ld\n",
2691 state
->dev
->ifindex
, state
->dev
->name
,
2693 im
->mca_users
, im
->mca_flags
,
2694 (im
->mca_flags
&MAF_TIMER_RUNNING
) ?
2695 jiffies_to_clock_t(im
->mca_timer
.expires
-jiffies
) : 0);
2699 static const struct seq_operations igmp6_mc_seq_ops
= {
2700 .start
= igmp6_mc_seq_start
,
2701 .next
= igmp6_mc_seq_next
,
2702 .stop
= igmp6_mc_seq_stop
,
2703 .show
= igmp6_mc_seq_show
,
2706 static int igmp6_mc_seq_open(struct inode
*inode
, struct file
*file
)
2708 return seq_open_net(inode
, file
, &igmp6_mc_seq_ops
,
2709 sizeof(struct igmp6_mc_iter_state
));
2712 static const struct file_operations igmp6_mc_seq_fops
= {
2713 .owner
= THIS_MODULE
,
2714 .open
= igmp6_mc_seq_open
,
2716 .llseek
= seq_lseek
,
2717 .release
= seq_release_net
,
2720 struct igmp6_mcf_iter_state
{
2721 struct seq_net_private p
;
2722 struct net_device
*dev
;
2723 struct inet6_dev
*idev
;
2724 struct ifmcaddr6
*im
;
2727 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2729 static inline struct ip6_sf_list
*igmp6_mcf_get_first(struct seq_file
*seq
)
2731 struct ip6_sf_list
*psf
= NULL
;
2732 struct ifmcaddr6
*im
= NULL
;
2733 struct igmp6_mcf_iter_state
*state
= igmp6_mcf_seq_private(seq
);
2734 struct net
*net
= seq_file_net(seq
);
2738 for_each_netdev_rcu(net
, state
->dev
) {
2739 struct inet6_dev
*idev
;
2740 idev
= __in6_dev_get(state
->dev
);
2741 if (unlikely(idev
== NULL
))
2743 read_lock_bh(&idev
->lock
);
2746 spin_lock_bh(&im
->mca_lock
);
2747 psf
= im
->mca_sources
;
2753 spin_unlock_bh(&im
->mca_lock
);
2755 read_unlock_bh(&idev
->lock
);
2760 static struct ip6_sf_list
*igmp6_mcf_get_next(struct seq_file
*seq
, struct ip6_sf_list
*psf
)
2762 struct igmp6_mcf_iter_state
*state
= igmp6_mcf_seq_private(seq
);
2766 spin_unlock_bh(&state
->im
->mca_lock
);
2767 state
->im
= state
->im
->next
;
2768 while (!state
->im
) {
2769 if (likely(state
->idev
))
2770 read_unlock_bh(&state
->idev
->lock
);
2772 state
->dev
= next_net_device_rcu(state
->dev
);
2777 state
->idev
= __in6_dev_get(state
->dev
);
2780 read_lock_bh(&state
->idev
->lock
);
2781 state
->im
= state
->idev
->mc_list
;
2785 spin_lock_bh(&state
->im
->mca_lock
);
2786 psf
= state
->im
->mca_sources
;
2792 static struct ip6_sf_list
*igmp6_mcf_get_idx(struct seq_file
*seq
, loff_t pos
)
2794 struct ip6_sf_list
*psf
= igmp6_mcf_get_first(seq
);
2796 while (pos
&& (psf
= igmp6_mcf_get_next(seq
, psf
)) != NULL
)
2798 return pos
? NULL
: psf
;
2801 static void *igmp6_mcf_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2805 return *pos
? igmp6_mcf_get_idx(seq
, *pos
- 1) : SEQ_START_TOKEN
;
2808 static void *igmp6_mcf_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2810 struct ip6_sf_list
*psf
;
2811 if (v
== SEQ_START_TOKEN
)
2812 psf
= igmp6_mcf_get_first(seq
);
2814 psf
= igmp6_mcf_get_next(seq
, v
);
2819 static void igmp6_mcf_seq_stop(struct seq_file
*seq
, void *v
)
2822 struct igmp6_mcf_iter_state
*state
= igmp6_mcf_seq_private(seq
);
2823 if (likely(state
->im
)) {
2824 spin_unlock_bh(&state
->im
->mca_lock
);
2827 if (likely(state
->idev
)) {
2828 read_unlock_bh(&state
->idev
->lock
);
2835 static int igmp6_mcf_seq_show(struct seq_file
*seq
, void *v
)
2837 struct ip6_sf_list
*psf
= (struct ip6_sf_list
*)v
;
2838 struct igmp6_mcf_iter_state
*state
= igmp6_mcf_seq_private(seq
);
2840 if (v
== SEQ_START_TOKEN
) {
2841 seq_puts(seq
, "Idx Device Multicast Address Source Address INC EXC\n");
2844 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
2845 state
->dev
->ifindex
, state
->dev
->name
,
2846 &state
->im
->mca_addr
,
2848 psf
->sf_count
[MCAST_INCLUDE
],
2849 psf
->sf_count
[MCAST_EXCLUDE
]);
2854 static const struct seq_operations igmp6_mcf_seq_ops
= {
2855 .start
= igmp6_mcf_seq_start
,
2856 .next
= igmp6_mcf_seq_next
,
2857 .stop
= igmp6_mcf_seq_stop
,
2858 .show
= igmp6_mcf_seq_show
,
2861 static int igmp6_mcf_seq_open(struct inode
*inode
, struct file
*file
)
2863 return seq_open_net(inode
, file
, &igmp6_mcf_seq_ops
,
2864 sizeof(struct igmp6_mcf_iter_state
));
2867 static const struct file_operations igmp6_mcf_seq_fops
= {
2868 .owner
= THIS_MODULE
,
2869 .open
= igmp6_mcf_seq_open
,
2871 .llseek
= seq_lseek
,
2872 .release
= seq_release_net
,
2875 static int __net_init
igmp6_proc_init(struct net
*net
)
2880 if (!proc_create("igmp6", S_IRUGO
, net
->proc_net
, &igmp6_mc_seq_fops
))
2882 if (!proc_create("mcfilter6", S_IRUGO
, net
->proc_net
,
2883 &igmp6_mcf_seq_fops
))
2884 goto out_proc_net_igmp6
;
2891 remove_proc_entry("igmp6", net
->proc_net
);
2895 static void __net_exit
igmp6_proc_exit(struct net
*net
)
2897 remove_proc_entry("mcfilter6", net
->proc_net
);
2898 remove_proc_entry("igmp6", net
->proc_net
);
2901 static inline int igmp6_proc_init(struct net
*net
)
2905 static inline void igmp6_proc_exit(struct net
*net
)
2910 static int __net_init
igmp6_net_init(struct net
*net
)
2914 err
= inet_ctl_sock_create(&net
->ipv6
.igmp_sk
, PF_INET6
,
2915 SOCK_RAW
, IPPROTO_ICMPV6
, net
);
2917 pr_err("Failed to initialize the IGMP6 control socket (err %d)\n",
2922 inet6_sk(net
->ipv6
.igmp_sk
)->hop_limit
= 1;
2924 err
= inet_ctl_sock_create(&net
->ipv6
.mc_autojoin_sk
, PF_INET6
,
2925 SOCK_RAW
, IPPROTO_ICMPV6
, net
);
2927 pr_err("Failed to initialize the IGMP6 autojoin socket (err %d)\n",
2929 goto out_sock_create
;
2932 err
= igmp6_proc_init(net
);
2934 goto out_sock_create_autojoin
;
2938 out_sock_create_autojoin
:
2939 inet_ctl_sock_destroy(net
->ipv6
.mc_autojoin_sk
);
2941 inet_ctl_sock_destroy(net
->ipv6
.igmp_sk
);
2946 static void __net_exit
igmp6_net_exit(struct net
*net
)
2948 inet_ctl_sock_destroy(net
->ipv6
.igmp_sk
);
2949 inet_ctl_sock_destroy(net
->ipv6
.mc_autojoin_sk
);
2950 igmp6_proc_exit(net
);
2953 static struct pernet_operations igmp6_net_ops
= {
2954 .init
= igmp6_net_init
,
2955 .exit
= igmp6_net_exit
,
2958 int __init
igmp6_init(void)
2960 return register_pernet_subsys(&igmp6_net_ops
);
2963 void igmp6_cleanup(void)
2965 unregister_pernet_subsys(&igmp6_net_ops
);