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 int __mld2_query_bugs
[] __attribute__((__unused__
)) = {
69 BUILD_BUG_ON_ZERO(offsetof(struct mld2_query
, mld2q_srcs
) % 4),
70 BUILD_BUG_ON_ZERO(offsetof(struct mld2_report
, mld2r_grec
) % 4),
71 BUILD_BUG_ON_ZERO(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(struct timer_list
*t
);
80 static void mld_gq_timer_expire(struct timer_list
*t
);
81 static void mld_ifc_timer_expire(struct timer_list
*t
);
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
, struct ifmcaddr6
*pmc
);
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
);
98 static int __ipv6_dev_mc_inc(struct net_device
*dev
,
99 const struct in6_addr
*addr
, unsigned int mode
);
101 #define MLD_QRV_DEFAULT 2
102 /* RFC3810, 9.2. Query Interval */
103 #define MLD_QI_DEFAULT (125 * HZ)
104 /* RFC3810, 9.3. Query Response Interval */
105 #define MLD_QRI_DEFAULT (10 * HZ)
107 /* RFC3810, 8.1 Query Version Distinctions */
108 #define MLD_V1_QUERY_LEN 24
109 #define MLD_V2_QUERY_LEN_MIN 28
111 #define IPV6_MLD_MAX_MSF 64
113 int sysctl_mld_max_msf __read_mostly
= IPV6_MLD_MAX_MSF
;
114 int sysctl_mld_qrv __read_mostly
= MLD_QRV_DEFAULT
;
117 * socket join on multicast group
120 #define for_each_pmc_rcu(np, pmc) \
121 for (pmc = rcu_dereference(np->ipv6_mc_list); \
123 pmc = rcu_dereference(pmc->next))
125 static int unsolicited_report_interval(struct inet6_dev
*idev
)
129 if (mld_in_v1_mode(idev
))
130 iv
= idev
->cnf
.mldv1_unsolicited_report_interval
;
132 iv
= idev
->cnf
.mldv2_unsolicited_report_interval
;
134 return iv
> 0 ? iv
: 1;
137 static int __ipv6_sock_mc_join(struct sock
*sk
, int ifindex
,
138 const struct in6_addr
*addr
, unsigned int mode
)
140 struct net_device
*dev
= NULL
;
141 struct ipv6_mc_socklist
*mc_lst
;
142 struct ipv6_pinfo
*np
= inet6_sk(sk
);
143 struct net
*net
= sock_net(sk
);
148 if (!ipv6_addr_is_multicast(addr
))
152 for_each_pmc_rcu(np
, mc_lst
) {
153 if ((ifindex
== 0 || mc_lst
->ifindex
== ifindex
) &&
154 ipv6_addr_equal(&mc_lst
->addr
, addr
)) {
161 mc_lst
= sock_kmalloc(sk
, sizeof(struct ipv6_mc_socklist
), GFP_KERNEL
);
167 mc_lst
->addr
= *addr
;
171 rt
= rt6_lookup(net
, addr
, NULL
, 0, NULL
, 0);
177 dev
= __dev_get_by_index(net
, ifindex
);
180 sock_kfree_s(sk
, mc_lst
, sizeof(*mc_lst
));
184 mc_lst
->ifindex
= dev
->ifindex
;
185 mc_lst
->sfmode
= mode
;
186 rwlock_init(&mc_lst
->sflock
);
187 mc_lst
->sflist
= NULL
;
190 * now add/increase the group membership on the device
193 err
= __ipv6_dev_mc_inc(dev
, addr
, mode
);
196 sock_kfree_s(sk
, mc_lst
, sizeof(*mc_lst
));
200 mc_lst
->next
= np
->ipv6_mc_list
;
201 rcu_assign_pointer(np
->ipv6_mc_list
, mc_lst
);
206 int ipv6_sock_mc_join(struct sock
*sk
, int ifindex
, const struct in6_addr
*addr
)
208 return __ipv6_sock_mc_join(sk
, ifindex
, addr
, MCAST_EXCLUDE
);
210 EXPORT_SYMBOL(ipv6_sock_mc_join
);
212 int ipv6_sock_mc_join_ssm(struct sock
*sk
, int ifindex
,
213 const struct in6_addr
*addr
, unsigned int mode
)
215 return __ipv6_sock_mc_join(sk
, ifindex
, addr
, mode
);
219 * socket leave on multicast group
221 int ipv6_sock_mc_drop(struct sock
*sk
, int ifindex
, const struct in6_addr
*addr
)
223 struct ipv6_pinfo
*np
= inet6_sk(sk
);
224 struct ipv6_mc_socklist
*mc_lst
;
225 struct ipv6_mc_socklist __rcu
**lnk
;
226 struct net
*net
= sock_net(sk
);
230 if (!ipv6_addr_is_multicast(addr
))
233 for (lnk
= &np
->ipv6_mc_list
;
234 (mc_lst
= rtnl_dereference(*lnk
)) != NULL
;
235 lnk
= &mc_lst
->next
) {
236 if ((ifindex
== 0 || mc_lst
->ifindex
== ifindex
) &&
237 ipv6_addr_equal(&mc_lst
->addr
, addr
)) {
238 struct net_device
*dev
;
242 dev
= __dev_get_by_index(net
, mc_lst
->ifindex
);
244 struct inet6_dev
*idev
= __in6_dev_get(dev
);
246 (void) ip6_mc_leave_src(sk
, mc_lst
, idev
);
248 __ipv6_dev_mc_dec(idev
, &mc_lst
->addr
);
250 (void) ip6_mc_leave_src(sk
, mc_lst
, NULL
);
252 atomic_sub(sizeof(*mc_lst
), &sk
->sk_omem_alloc
);
253 kfree_rcu(mc_lst
, rcu
);
258 return -EADDRNOTAVAIL
;
260 EXPORT_SYMBOL(ipv6_sock_mc_drop
);
262 /* called with rcu_read_lock() */
263 static struct inet6_dev
*ip6_mc_find_dev_rcu(struct net
*net
,
264 const struct in6_addr
*group
,
267 struct net_device
*dev
= NULL
;
268 struct inet6_dev
*idev
= NULL
;
271 struct rt6_info
*rt
= rt6_lookup(net
, group
, NULL
, 0, NULL
, 0);
278 dev
= dev_get_by_index_rcu(net
, ifindex
);
282 idev
= __in6_dev_get(dev
);
285 read_lock_bh(&idev
->lock
);
287 read_unlock_bh(&idev
->lock
);
293 void __ipv6_sock_mc_close(struct sock
*sk
)
295 struct ipv6_pinfo
*np
= inet6_sk(sk
);
296 struct ipv6_mc_socklist
*mc_lst
;
297 struct net
*net
= sock_net(sk
);
301 while ((mc_lst
= rtnl_dereference(np
->ipv6_mc_list
)) != NULL
) {
302 struct net_device
*dev
;
304 np
->ipv6_mc_list
= mc_lst
->next
;
306 dev
= __dev_get_by_index(net
, mc_lst
->ifindex
);
308 struct inet6_dev
*idev
= __in6_dev_get(dev
);
310 (void) ip6_mc_leave_src(sk
, mc_lst
, idev
);
312 __ipv6_dev_mc_dec(idev
, &mc_lst
->addr
);
314 (void) ip6_mc_leave_src(sk
, mc_lst
, NULL
);
316 atomic_sub(sizeof(*mc_lst
), &sk
->sk_omem_alloc
);
317 kfree_rcu(mc_lst
, rcu
);
321 void ipv6_sock_mc_close(struct sock
*sk
)
323 struct ipv6_pinfo
*np
= inet6_sk(sk
);
325 if (!rcu_access_pointer(np
->ipv6_mc_list
))
328 __ipv6_sock_mc_close(sk
);
332 int ip6_mc_source(int add
, int omode
, struct sock
*sk
,
333 struct group_source_req
*pgsr
)
335 struct in6_addr
*source
, *group
;
336 struct ipv6_mc_socklist
*pmc
;
337 struct inet6_dev
*idev
;
338 struct ipv6_pinfo
*inet6
= inet6_sk(sk
);
339 struct ip6_sf_socklist
*psl
;
340 struct net
*net
= sock_net(sk
);
346 source
= &((struct sockaddr_in6
*)&pgsr
->gsr_source
)->sin6_addr
;
347 group
= &((struct sockaddr_in6
*)&pgsr
->gsr_group
)->sin6_addr
;
349 if (!ipv6_addr_is_multicast(group
))
353 idev
= ip6_mc_find_dev_rcu(net
, group
, pgsr
->gsr_interface
);
359 err
= -EADDRNOTAVAIL
;
361 for_each_pmc_rcu(inet6
, pmc
) {
362 if (pgsr
->gsr_interface
&& pmc
->ifindex
!= pgsr
->gsr_interface
)
364 if (ipv6_addr_equal(&pmc
->addr
, group
))
367 if (!pmc
) { /* must have a prior join */
371 /* if a source filter was set, must be the same mode as before */
373 if (pmc
->sfmode
!= omode
) {
377 } else if (pmc
->sfmode
!= omode
) {
378 /* allow mode switches for empty-set filters */
379 ip6_mc_add_src(idev
, group
, omode
, 0, NULL
, 0);
380 ip6_mc_del_src(idev
, group
, pmc
->sfmode
, 0, NULL
, 0);
384 write_lock(&pmc
->sflock
);
390 goto done
; /* err = -EADDRNOTAVAIL */
392 for (i
= 0; i
< psl
->sl_count
; i
++) {
393 rv
= !ipv6_addr_equal(&psl
->sl_addr
[i
], source
);
397 if (rv
) /* source not found */
398 goto done
; /* err = -EADDRNOTAVAIL */
400 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
401 if (psl
->sl_count
== 1 && omode
== MCAST_INCLUDE
) {
406 /* update the interface filter */
407 ip6_mc_del_src(idev
, group
, omode
, 1, source
, 1);
409 for (j
= i
+1; j
< psl
->sl_count
; j
++)
410 psl
->sl_addr
[j
-1] = psl
->sl_addr
[j
];
415 /* else, add a new source to the filter */
417 if (psl
&& psl
->sl_count
>= sysctl_mld_max_msf
) {
421 if (!psl
|| psl
->sl_count
== psl
->sl_max
) {
422 struct ip6_sf_socklist
*newpsl
;
423 int count
= IP6_SFBLOCK
;
426 count
+= psl
->sl_max
;
427 newpsl
= sock_kmalloc(sk
, IP6_SFLSIZE(count
), GFP_ATOMIC
);
432 newpsl
->sl_max
= count
;
433 newpsl
->sl_count
= count
- IP6_SFBLOCK
;
435 for (i
= 0; i
< psl
->sl_count
; i
++)
436 newpsl
->sl_addr
[i
] = psl
->sl_addr
[i
];
437 sock_kfree_s(sk
, psl
, IP6_SFLSIZE(psl
->sl_max
));
439 pmc
->sflist
= psl
= newpsl
;
441 rv
= 1; /* > 0 for insert logic below if sl_count is 0 */
442 for (i
= 0; i
< psl
->sl_count
; i
++) {
443 rv
= !ipv6_addr_equal(&psl
->sl_addr
[i
], source
);
444 if (rv
== 0) /* There is an error in the address. */
447 for (j
= psl
->sl_count
-1; j
>= i
; j
--)
448 psl
->sl_addr
[j
+1] = psl
->sl_addr
[j
];
449 psl
->sl_addr
[i
] = *source
;
452 /* update the interface list */
453 ip6_mc_add_src(idev
, group
, omode
, 1, source
, 1);
456 write_unlock(&pmc
->sflock
);
457 read_unlock_bh(&idev
->lock
);
460 err
= ipv6_sock_mc_drop(sk
, pgsr
->gsr_interface
, group
);
464 int ip6_mc_msfilter(struct sock
*sk
, struct group_filter
*gsf
)
466 const struct in6_addr
*group
;
467 struct ipv6_mc_socklist
*pmc
;
468 struct inet6_dev
*idev
;
469 struct ipv6_pinfo
*inet6
= inet6_sk(sk
);
470 struct ip6_sf_socklist
*newpsl
, *psl
;
471 struct net
*net
= sock_net(sk
);
475 group
= &((struct sockaddr_in6
*)&gsf
->gf_group
)->sin6_addr
;
477 if (!ipv6_addr_is_multicast(group
))
479 if (gsf
->gf_fmode
!= MCAST_INCLUDE
&&
480 gsf
->gf_fmode
!= MCAST_EXCLUDE
)
484 idev
= ip6_mc_find_dev_rcu(net
, group
, gsf
->gf_interface
);
493 if (gsf
->gf_fmode
== MCAST_INCLUDE
&& gsf
->gf_numsrc
== 0) {
498 for_each_pmc_rcu(inet6
, pmc
) {
499 if (pmc
->ifindex
!= gsf
->gf_interface
)
501 if (ipv6_addr_equal(&pmc
->addr
, group
))
504 if (!pmc
) { /* must have a prior join */
508 if (gsf
->gf_numsrc
) {
509 newpsl
= sock_kmalloc(sk
, IP6_SFLSIZE(gsf
->gf_numsrc
),
515 newpsl
->sl_max
= newpsl
->sl_count
= gsf
->gf_numsrc
;
516 for (i
= 0; i
< newpsl
->sl_count
; ++i
) {
517 struct sockaddr_in6
*psin6
;
519 psin6
= (struct sockaddr_in6
*)&gsf
->gf_slist
[i
];
520 newpsl
->sl_addr
[i
] = psin6
->sin6_addr
;
522 err
= ip6_mc_add_src(idev
, group
, gsf
->gf_fmode
,
523 newpsl
->sl_count
, newpsl
->sl_addr
, 0);
525 sock_kfree_s(sk
, newpsl
, IP6_SFLSIZE(newpsl
->sl_max
));
530 (void) ip6_mc_add_src(idev
, group
, gsf
->gf_fmode
, 0, NULL
, 0);
533 write_lock(&pmc
->sflock
);
536 (void) ip6_mc_del_src(idev
, group
, pmc
->sfmode
,
537 psl
->sl_count
, psl
->sl_addr
, 0);
538 sock_kfree_s(sk
, psl
, IP6_SFLSIZE(psl
->sl_max
));
540 (void) ip6_mc_del_src(idev
, group
, pmc
->sfmode
, 0, NULL
, 0);
541 pmc
->sflist
= newpsl
;
542 pmc
->sfmode
= gsf
->gf_fmode
;
543 write_unlock(&pmc
->sflock
);
546 read_unlock_bh(&idev
->lock
);
549 err
= ipv6_sock_mc_drop(sk
, gsf
->gf_interface
, group
);
553 int ip6_mc_msfget(struct sock
*sk
, struct group_filter
*gsf
,
554 struct group_filter __user
*optval
, int __user
*optlen
)
556 int err
, i
, count
, copycount
;
557 const struct in6_addr
*group
;
558 struct ipv6_mc_socklist
*pmc
;
559 struct inet6_dev
*idev
;
560 struct ipv6_pinfo
*inet6
= inet6_sk(sk
);
561 struct ip6_sf_socklist
*psl
;
562 struct net
*net
= sock_net(sk
);
564 group
= &((struct sockaddr_in6
*)&gsf
->gf_group
)->sin6_addr
;
566 if (!ipv6_addr_is_multicast(group
))
570 idev
= ip6_mc_find_dev_rcu(net
, group
, gsf
->gf_interface
);
577 err
= -EADDRNOTAVAIL
;
578 /* changes to the ipv6_mc_list require the socket lock and
579 * rtnl lock. We have the socket lock and rcu read lock,
580 * so reading the list is safe.
583 for_each_pmc_rcu(inet6
, pmc
) {
584 if (pmc
->ifindex
!= gsf
->gf_interface
)
586 if (ipv6_addr_equal(group
, &pmc
->addr
))
589 if (!pmc
) /* must have a prior join */
591 gsf
->gf_fmode
= pmc
->sfmode
;
593 count
= psl
? psl
->sl_count
: 0;
594 read_unlock_bh(&idev
->lock
);
597 copycount
= count
< gsf
->gf_numsrc
? count
: gsf
->gf_numsrc
;
598 gsf
->gf_numsrc
= count
;
599 if (put_user(GROUP_FILTER_SIZE(copycount
), optlen
) ||
600 copy_to_user(optval
, gsf
, GROUP_FILTER_SIZE(0))) {
603 /* changes to psl require the socket lock, and a write lock
604 * on pmc->sflock. We have the socket lock so reading here is safe.
606 for (i
= 0; i
< copycount
; i
++) {
607 struct sockaddr_in6
*psin6
;
608 struct sockaddr_storage ss
;
610 psin6
= (struct sockaddr_in6
*)&ss
;
611 memset(&ss
, 0, sizeof(ss
));
612 psin6
->sin6_family
= AF_INET6
;
613 psin6
->sin6_addr
= psl
->sl_addr
[i
];
614 if (copy_to_user(&optval
->gf_slist
[i
], &ss
, sizeof(ss
)))
619 read_unlock_bh(&idev
->lock
);
624 bool inet6_mc_check(struct sock
*sk
, const struct in6_addr
*mc_addr
,
625 const struct in6_addr
*src_addr
)
627 struct ipv6_pinfo
*np
= inet6_sk(sk
);
628 struct ipv6_mc_socklist
*mc
;
629 struct ip6_sf_socklist
*psl
;
633 for_each_pmc_rcu(np
, mc
) {
634 if (ipv6_addr_equal(&mc
->addr
, mc_addr
))
641 read_lock(&mc
->sflock
);
644 rv
= mc
->sfmode
== MCAST_EXCLUDE
;
648 for (i
= 0; i
< psl
->sl_count
; i
++) {
649 if (ipv6_addr_equal(&psl
->sl_addr
[i
], src_addr
))
652 if (mc
->sfmode
== MCAST_INCLUDE
&& i
>= psl
->sl_count
)
654 if (mc
->sfmode
== MCAST_EXCLUDE
&& i
< psl
->sl_count
)
657 read_unlock(&mc
->sflock
);
663 static void igmp6_group_added(struct ifmcaddr6
*mc
, unsigned int mode
)
665 struct net_device
*dev
= mc
->idev
->dev
;
666 char buf
[MAX_ADDR_LEN
];
668 if (IPV6_ADDR_MC_SCOPE(&mc
->mca_addr
) <
669 IPV6_ADDR_SCOPE_LINKLOCAL
)
672 spin_lock_bh(&mc
->mca_lock
);
673 if (!(mc
->mca_flags
&MAF_LOADED
)) {
674 mc
->mca_flags
|= MAF_LOADED
;
675 if (ndisc_mc_map(&mc
->mca_addr
, buf
, dev
, 0) == 0)
676 dev_mc_add(dev
, buf
);
678 spin_unlock_bh(&mc
->mca_lock
);
680 if (!(dev
->flags
& IFF_UP
) || (mc
->mca_flags
& MAF_NOREPORT
))
683 if (mld_in_v1_mode(mc
->idev
)) {
684 igmp6_join_group(mc
);
689 /* Based on RFC3810 6.1, for newly added INCLUDE SSM, we
690 * should not send filter-mode change record as the mode
691 * should be from IN() to IN(A).
693 if (mode
== MCAST_EXCLUDE
)
694 mc
->mca_crcount
= mc
->idev
->mc_qrv
;
696 mld_ifc_event(mc
->idev
);
699 static void igmp6_group_dropped(struct ifmcaddr6
*mc
)
701 struct net_device
*dev
= mc
->idev
->dev
;
702 char buf
[MAX_ADDR_LEN
];
704 if (IPV6_ADDR_MC_SCOPE(&mc
->mca_addr
) <
705 IPV6_ADDR_SCOPE_LINKLOCAL
)
708 spin_lock_bh(&mc
->mca_lock
);
709 if (mc
->mca_flags
&MAF_LOADED
) {
710 mc
->mca_flags
&= ~MAF_LOADED
;
711 if (ndisc_mc_map(&mc
->mca_addr
, buf
, dev
, 0) == 0)
712 dev_mc_del(dev
, buf
);
715 spin_unlock_bh(&mc
->mca_lock
);
716 if (mc
->mca_flags
& MAF_NOREPORT
)
720 igmp6_leave_group(mc
);
722 spin_lock_bh(&mc
->mca_lock
);
723 if (del_timer(&mc
->mca_timer
))
724 refcount_dec(&mc
->mca_refcnt
);
725 spin_unlock_bh(&mc
->mca_lock
);
729 * deleted ifmcaddr6 manipulation
731 static void mld_add_delrec(struct inet6_dev
*idev
, struct ifmcaddr6
*im
)
733 struct ifmcaddr6
*pmc
;
735 /* this is an "ifmcaddr6" for convenience; only the fields below
736 * are actually used. In particular, the refcnt and users are not
737 * used for management of the delete list. Using the same structure
738 * for deleted items allows change reports to use common code with
739 * non-deleted or query-response MCA's.
741 pmc
= kzalloc(sizeof(*pmc
), GFP_ATOMIC
);
745 spin_lock_bh(&im
->mca_lock
);
746 spin_lock_init(&pmc
->mca_lock
);
747 pmc
->idev
= im
->idev
;
749 pmc
->mca_addr
= im
->mca_addr
;
750 pmc
->mca_crcount
= idev
->mc_qrv
;
751 pmc
->mca_sfmode
= im
->mca_sfmode
;
752 if (pmc
->mca_sfmode
== MCAST_INCLUDE
) {
753 struct ip6_sf_list
*psf
;
755 pmc
->mca_tomb
= im
->mca_tomb
;
756 pmc
->mca_sources
= im
->mca_sources
;
757 im
->mca_tomb
= im
->mca_sources
= NULL
;
758 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
)
759 psf
->sf_crcount
= pmc
->mca_crcount
;
761 spin_unlock_bh(&im
->mca_lock
);
763 spin_lock_bh(&idev
->mc_lock
);
764 pmc
->next
= idev
->mc_tomb
;
766 spin_unlock_bh(&idev
->mc_lock
);
769 static void mld_del_delrec(struct inet6_dev
*idev
, struct ifmcaddr6
*im
)
771 struct ifmcaddr6
*pmc
, *pmc_prev
;
772 struct ip6_sf_list
*psf
;
773 struct in6_addr
*pmca
= &im
->mca_addr
;
775 spin_lock_bh(&idev
->mc_lock
);
777 for (pmc
= idev
->mc_tomb
; pmc
; pmc
= pmc
->next
) {
778 if (ipv6_addr_equal(&pmc
->mca_addr
, pmca
))
784 pmc_prev
->next
= pmc
->next
;
786 idev
->mc_tomb
= pmc
->next
;
788 spin_unlock_bh(&idev
->mc_lock
);
790 spin_lock_bh(&im
->mca_lock
);
792 im
->idev
= pmc
->idev
;
793 if (im
->mca_sfmode
== MCAST_INCLUDE
) {
794 im
->mca_tomb
= pmc
->mca_tomb
;
795 im
->mca_sources
= pmc
->mca_sources
;
796 for (psf
= im
->mca_sources
; psf
; psf
= psf
->sf_next
)
797 psf
->sf_crcount
= idev
->mc_qrv
;
799 im
->mca_crcount
= idev
->mc_qrv
;
801 in6_dev_put(pmc
->idev
);
804 spin_unlock_bh(&im
->mca_lock
);
807 static void mld_clear_delrec(struct inet6_dev
*idev
)
809 struct ifmcaddr6
*pmc
, *nextpmc
;
811 spin_lock_bh(&idev
->mc_lock
);
813 idev
->mc_tomb
= NULL
;
814 spin_unlock_bh(&idev
->mc_lock
);
816 for (; pmc
; pmc
= nextpmc
) {
818 ip6_mc_clear_src(pmc
);
819 in6_dev_put(pmc
->idev
);
823 /* clear dead sources, too */
824 read_lock_bh(&idev
->lock
);
825 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
) {
826 struct ip6_sf_list
*psf
, *psf_next
;
828 spin_lock_bh(&pmc
->mca_lock
);
830 pmc
->mca_tomb
= NULL
;
831 spin_unlock_bh(&pmc
->mca_lock
);
832 for (; psf
; psf
= psf_next
) {
833 psf_next
= psf
->sf_next
;
837 read_unlock_bh(&idev
->lock
);
840 static void mca_get(struct ifmcaddr6
*mc
)
842 refcount_inc(&mc
->mca_refcnt
);
845 static void ma_put(struct ifmcaddr6
*mc
)
847 if (refcount_dec_and_test(&mc
->mca_refcnt
)) {
848 in6_dev_put(mc
->idev
);
853 static struct ifmcaddr6
*mca_alloc(struct inet6_dev
*idev
,
854 const struct in6_addr
*addr
,
857 struct ifmcaddr6
*mc
;
859 mc
= kzalloc(sizeof(*mc
), GFP_ATOMIC
);
863 timer_setup(&mc
->mca_timer
, igmp6_timer_handler
, 0);
865 mc
->mca_addr
= *addr
;
866 mc
->idev
= idev
; /* reference taken by caller */
868 /* mca_stamp should be updated upon changes */
869 mc
->mca_cstamp
= mc
->mca_tstamp
= jiffies
;
870 refcount_set(&mc
->mca_refcnt
, 1);
871 spin_lock_init(&mc
->mca_lock
);
873 mc
->mca_sfmode
= mode
;
874 mc
->mca_sfcount
[mode
] = 1;
876 if (ipv6_addr_is_ll_all_nodes(&mc
->mca_addr
) ||
877 IPV6_ADDR_MC_SCOPE(&mc
->mca_addr
) < IPV6_ADDR_SCOPE_LINKLOCAL
)
878 mc
->mca_flags
|= MAF_NOREPORT
;
884 * device multicast group inc (add if not found)
886 static int __ipv6_dev_mc_inc(struct net_device
*dev
,
887 const struct in6_addr
*addr
, unsigned int mode
)
889 struct ifmcaddr6
*mc
;
890 struct inet6_dev
*idev
;
894 /* we need to take a reference on idev */
895 idev
= in6_dev_get(dev
);
900 write_lock_bh(&idev
->lock
);
902 write_unlock_bh(&idev
->lock
);
907 for (mc
= idev
->mc_list
; mc
; mc
= mc
->next
) {
908 if (ipv6_addr_equal(&mc
->mca_addr
, addr
)) {
910 write_unlock_bh(&idev
->lock
);
911 ip6_mc_add_src(idev
, &mc
->mca_addr
, mode
, 0, NULL
, 0);
917 mc
= mca_alloc(idev
, addr
, mode
);
919 write_unlock_bh(&idev
->lock
);
924 mc
->next
= idev
->mc_list
;
927 /* Hold this for the code below before we unlock,
928 * it is already exposed via idev->mc_list.
931 write_unlock_bh(&idev
->lock
);
933 mld_del_delrec(idev
, mc
);
934 igmp6_group_added(mc
, mode
);
939 int ipv6_dev_mc_inc(struct net_device
*dev
, const struct in6_addr
*addr
)
941 return __ipv6_dev_mc_inc(dev
, addr
, MCAST_EXCLUDE
);
945 * device multicast group del
947 int __ipv6_dev_mc_dec(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
949 struct ifmcaddr6
*ma
, **map
;
953 write_lock_bh(&idev
->lock
);
954 for (map
= &idev
->mc_list
; (ma
= *map
) != NULL
; map
= &ma
->next
) {
955 if (ipv6_addr_equal(&ma
->mca_addr
, addr
)) {
956 if (--ma
->mca_users
== 0) {
958 write_unlock_bh(&idev
->lock
);
960 igmp6_group_dropped(ma
);
961 ip6_mc_clear_src(ma
);
966 write_unlock_bh(&idev
->lock
);
970 write_unlock_bh(&idev
->lock
);
975 int ipv6_dev_mc_dec(struct net_device
*dev
, const struct in6_addr
*addr
)
977 struct inet6_dev
*idev
;
982 idev
= __in6_dev_get(dev
);
986 err
= __ipv6_dev_mc_dec(idev
, addr
);
992 * check if the interface/address pair is valid
994 bool ipv6_chk_mcast_addr(struct net_device
*dev
, const struct in6_addr
*group
,
995 const struct in6_addr
*src_addr
)
997 struct inet6_dev
*idev
;
998 struct ifmcaddr6
*mc
;
1002 idev
= __in6_dev_get(dev
);
1004 read_lock_bh(&idev
->lock
);
1005 for (mc
= idev
->mc_list
; mc
; mc
= mc
->next
) {
1006 if (ipv6_addr_equal(&mc
->mca_addr
, group
))
1010 if (src_addr
&& !ipv6_addr_any(src_addr
)) {
1011 struct ip6_sf_list
*psf
;
1013 spin_lock_bh(&mc
->mca_lock
);
1014 for (psf
= mc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
1015 if (ipv6_addr_equal(&psf
->sf_addr
, src_addr
))
1019 rv
= psf
->sf_count
[MCAST_INCLUDE
] ||
1020 psf
->sf_count
[MCAST_EXCLUDE
] !=
1021 mc
->mca_sfcount
[MCAST_EXCLUDE
];
1023 rv
= mc
->mca_sfcount
[MCAST_EXCLUDE
] != 0;
1024 spin_unlock_bh(&mc
->mca_lock
);
1026 rv
= true; /* don't filter unspecified source */
1028 read_unlock_bh(&idev
->lock
);
1034 static void mld_gq_start_timer(struct inet6_dev
*idev
)
1036 unsigned long tv
= prandom_u32() % idev
->mc_maxdelay
;
1038 idev
->mc_gq_running
= 1;
1039 if (!mod_timer(&idev
->mc_gq_timer
, jiffies
+tv
+2))
1043 static void mld_gq_stop_timer(struct inet6_dev
*idev
)
1045 idev
->mc_gq_running
= 0;
1046 if (del_timer(&idev
->mc_gq_timer
))
1047 __in6_dev_put(idev
);
1050 static void mld_ifc_start_timer(struct inet6_dev
*idev
, unsigned long delay
)
1052 unsigned long tv
= prandom_u32() % delay
;
1054 if (!mod_timer(&idev
->mc_ifc_timer
, jiffies
+tv
+2))
1058 static void mld_ifc_stop_timer(struct inet6_dev
*idev
)
1060 idev
->mc_ifc_count
= 0;
1061 if (del_timer(&idev
->mc_ifc_timer
))
1062 __in6_dev_put(idev
);
1065 static void mld_dad_start_timer(struct inet6_dev
*idev
, unsigned long delay
)
1067 unsigned long tv
= prandom_u32() % delay
;
1069 if (!mod_timer(&idev
->mc_dad_timer
, jiffies
+tv
+2))
1073 static void mld_dad_stop_timer(struct inet6_dev
*idev
)
1075 if (del_timer(&idev
->mc_dad_timer
))
1076 __in6_dev_put(idev
);
1080 * IGMP handling (alias multicast ICMPv6 messages)
1083 static void igmp6_group_queried(struct ifmcaddr6
*ma
, unsigned long resptime
)
1085 unsigned long delay
= resptime
;
1087 /* Do not start timer for these addresses */
1088 if (ipv6_addr_is_ll_all_nodes(&ma
->mca_addr
) ||
1089 IPV6_ADDR_MC_SCOPE(&ma
->mca_addr
) < IPV6_ADDR_SCOPE_LINKLOCAL
)
1092 if (del_timer(&ma
->mca_timer
)) {
1093 refcount_dec(&ma
->mca_refcnt
);
1094 delay
= ma
->mca_timer
.expires
- jiffies
;
1097 if (delay
>= resptime
)
1098 delay
= prandom_u32() % resptime
;
1100 ma
->mca_timer
.expires
= jiffies
+ delay
;
1101 if (!mod_timer(&ma
->mca_timer
, jiffies
+ delay
))
1102 refcount_inc(&ma
->mca_refcnt
);
1103 ma
->mca_flags
|= MAF_TIMER_RUNNING
;
1106 /* mark EXCLUDE-mode sources */
1107 static bool mld_xmarksources(struct ifmcaddr6
*pmc
, int nsrcs
,
1108 const struct in6_addr
*srcs
)
1110 struct ip6_sf_list
*psf
;
1114 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
1115 if (scount
== nsrcs
)
1117 for (i
= 0; i
< nsrcs
; i
++) {
1118 /* skip inactive filters */
1119 if (psf
->sf_count
[MCAST_INCLUDE
] ||
1120 pmc
->mca_sfcount
[MCAST_EXCLUDE
] !=
1121 psf
->sf_count
[MCAST_EXCLUDE
])
1123 if (ipv6_addr_equal(&srcs
[i
], &psf
->sf_addr
)) {
1129 pmc
->mca_flags
&= ~MAF_GSQUERY
;
1130 if (scount
== nsrcs
) /* all sources excluded */
1135 static bool mld_marksources(struct ifmcaddr6
*pmc
, int nsrcs
,
1136 const struct in6_addr
*srcs
)
1138 struct ip6_sf_list
*psf
;
1141 if (pmc
->mca_sfmode
== MCAST_EXCLUDE
)
1142 return mld_xmarksources(pmc
, nsrcs
, srcs
);
1144 /* mark INCLUDE-mode sources */
1147 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
1148 if (scount
== nsrcs
)
1150 for (i
= 0; i
< nsrcs
; i
++) {
1151 if (ipv6_addr_equal(&srcs
[i
], &psf
->sf_addr
)) {
1159 pmc
->mca_flags
&= ~MAF_GSQUERY
;
1162 pmc
->mca_flags
|= MAF_GSQUERY
;
1166 static int mld_force_mld_version(const struct inet6_dev
*idev
)
1168 /* Normally, both are 0 here. If enforcement to a particular is
1169 * being used, individual device enforcement will have a lower
1170 * precedence over 'all' device (.../conf/all/force_mld_version).
1173 if (dev_net(idev
->dev
)->ipv6
.devconf_all
->force_mld_version
!= 0)
1174 return dev_net(idev
->dev
)->ipv6
.devconf_all
->force_mld_version
;
1176 return idev
->cnf
.force_mld_version
;
1179 static bool mld_in_v2_mode_only(const struct inet6_dev
*idev
)
1181 return mld_force_mld_version(idev
) == 2;
1184 static bool mld_in_v1_mode_only(const struct inet6_dev
*idev
)
1186 return mld_force_mld_version(idev
) == 1;
1189 static bool mld_in_v1_mode(const struct inet6_dev
*idev
)
1191 if (mld_in_v2_mode_only(idev
))
1193 if (mld_in_v1_mode_only(idev
))
1195 if (idev
->mc_v1_seen
&& time_before(jiffies
, idev
->mc_v1_seen
))
1201 static void mld_set_v1_mode(struct inet6_dev
*idev
)
1203 /* RFC3810, relevant sections:
1204 * - 9.1. Robustness Variable
1205 * - 9.2. Query Interval
1206 * - 9.3. Query Response Interval
1207 * - 9.12. Older Version Querier Present Timeout
1209 unsigned long switchback
;
1211 switchback
= (idev
->mc_qrv
* idev
->mc_qi
) + idev
->mc_qri
;
1213 idev
->mc_v1_seen
= jiffies
+ switchback
;
1216 static void mld_update_qrv(struct inet6_dev
*idev
,
1217 const struct mld2_query
*mlh2
)
1219 /* RFC3810, relevant sections:
1220 * - 5.1.8. QRV (Querier's Robustness Variable)
1221 * - 9.1. Robustness Variable
1224 /* The value of the Robustness Variable MUST NOT be zero,
1225 * and SHOULD NOT be one. Catch this here if we ever run
1226 * into such a case in future.
1228 const int min_qrv
= min(MLD_QRV_DEFAULT
, sysctl_mld_qrv
);
1229 WARN_ON(idev
->mc_qrv
== 0);
1231 if (mlh2
->mld2q_qrv
> 0)
1232 idev
->mc_qrv
= mlh2
->mld2q_qrv
;
1234 if (unlikely(idev
->mc_qrv
< min_qrv
)) {
1235 net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n",
1236 idev
->mc_qrv
, min_qrv
);
1237 idev
->mc_qrv
= min_qrv
;
1241 static void mld_update_qi(struct inet6_dev
*idev
,
1242 const struct mld2_query
*mlh2
)
1244 /* RFC3810, relevant sections:
1245 * - 5.1.9. QQIC (Querier's Query Interval Code)
1246 * - 9.2. Query Interval
1247 * - 9.12. Older Version Querier Present Timeout
1248 * (the [Query Interval] in the last Query received)
1250 unsigned long mc_qqi
;
1252 if (mlh2
->mld2q_qqic
< 128) {
1253 mc_qqi
= mlh2
->mld2q_qqic
;
1255 unsigned long mc_man
, mc_exp
;
1257 mc_exp
= MLDV2_QQIC_EXP(mlh2
->mld2q_qqic
);
1258 mc_man
= MLDV2_QQIC_MAN(mlh2
->mld2q_qqic
);
1260 mc_qqi
= (mc_man
| 0x10) << (mc_exp
+ 3);
1263 idev
->mc_qi
= mc_qqi
* HZ
;
1266 static void mld_update_qri(struct inet6_dev
*idev
,
1267 const struct mld2_query
*mlh2
)
1269 /* RFC3810, relevant sections:
1270 * - 5.1.3. Maximum Response Code
1271 * - 9.3. Query Response Interval
1273 idev
->mc_qri
= msecs_to_jiffies(mldv2_mrc(mlh2
));
1276 static int mld_process_v1(struct inet6_dev
*idev
, struct mld_msg
*mld
,
1277 unsigned long *max_delay
, bool v1_query
)
1279 unsigned long mldv1_md
;
1281 /* Ignore v1 queries */
1282 if (mld_in_v2_mode_only(idev
))
1285 mldv1_md
= ntohs(mld
->mld_maxdelay
);
1287 /* When in MLDv1 fallback and a MLDv2 router start-up being
1288 * unaware of current MLDv1 operation, the MRC == MRD mapping
1289 * only works when the exponential algorithm is not being
1290 * used (as MLDv1 is unaware of such things).
1292 * According to the RFC author, the MLDv2 implementations
1293 * he's aware of all use a MRC < 32768 on start up queries.
1295 * Thus, should we *ever* encounter something else larger
1296 * than that, just assume the maximum possible within our
1300 mldv1_md
= min(mldv1_md
, MLDV1_MRD_MAX_COMPAT
);
1302 *max_delay
= max(msecs_to_jiffies(mldv1_md
), 1UL);
1304 /* MLDv1 router present: we need to go into v1 mode *only*
1305 * when an MLDv1 query is received as per section 9.12. of
1306 * RFC3810! And we know from RFC2710 section 3.7 that MLDv1
1307 * queries MUST be of exactly 24 octets.
1310 mld_set_v1_mode(idev
);
1312 /* cancel MLDv2 report timer */
1313 mld_gq_stop_timer(idev
);
1314 /* cancel the interface change timer */
1315 mld_ifc_stop_timer(idev
);
1316 /* clear deleted report items */
1317 mld_clear_delrec(idev
);
1322 static int mld_process_v2(struct inet6_dev
*idev
, struct mld2_query
*mld
,
1323 unsigned long *max_delay
)
1325 *max_delay
= max(msecs_to_jiffies(mldv2_mrc(mld
)), 1UL);
1327 mld_update_qrv(idev
, mld
);
1328 mld_update_qi(idev
, mld
);
1329 mld_update_qri(idev
, mld
);
1331 idev
->mc_maxdelay
= *max_delay
;
1336 /* called with rcu_read_lock() */
1337 int igmp6_event_query(struct sk_buff
*skb
)
1339 struct mld2_query
*mlh2
= NULL
;
1340 struct ifmcaddr6
*ma
;
1341 const struct in6_addr
*group
;
1342 unsigned long max_delay
;
1343 struct inet6_dev
*idev
;
1344 struct mld_msg
*mld
;
1349 if (!pskb_may_pull(skb
, sizeof(struct in6_addr
)))
1352 /* compute payload length excluding extension headers */
1353 len
= ntohs(ipv6_hdr(skb
)->payload_len
) + sizeof(struct ipv6hdr
);
1354 len
-= skb_network_header_len(skb
);
1357 * Upon reception of an MLD message that contains a Query, the node
1358 * checks if the source address of the message is a valid link-local
1359 * address, if the Hop Limit is set to 1, and if the Router Alert
1360 * option is present in the Hop-By-Hop Options header of the IPv6
1361 * packet. If any of these checks fails, the packet is dropped.
1363 if (!(ipv6_addr_type(&ipv6_hdr(skb
)->saddr
) & IPV6_ADDR_LINKLOCAL
) ||
1364 ipv6_hdr(skb
)->hop_limit
!= 1 ||
1365 !(IP6CB(skb
)->flags
& IP6SKB_ROUTERALERT
) ||
1366 IP6CB(skb
)->ra
!= htons(IPV6_OPT_ROUTERALERT_MLD
))
1369 idev
= __in6_dev_get(skb
->dev
);
1373 mld
= (struct mld_msg
*)icmp6_hdr(skb
);
1374 group
= &mld
->mld_mca
;
1375 group_type
= ipv6_addr_type(group
);
1377 if (group_type
!= IPV6_ADDR_ANY
&&
1378 !(group_type
&IPV6_ADDR_MULTICAST
))
1381 if (len
< MLD_V1_QUERY_LEN
) {
1383 } else if (len
== MLD_V1_QUERY_LEN
|| mld_in_v1_mode(idev
)) {
1384 err
= mld_process_v1(idev
, mld
, &max_delay
,
1385 len
== MLD_V1_QUERY_LEN
);
1388 } else if (len
>= MLD_V2_QUERY_LEN_MIN
) {
1389 int srcs_offset
= sizeof(struct mld2_query
) -
1390 sizeof(struct icmp6hdr
);
1392 if (!pskb_may_pull(skb
, srcs_offset
))
1395 mlh2
= (struct mld2_query
*)skb_transport_header(skb
);
1397 err
= mld_process_v2(idev
, mlh2
, &max_delay
);
1401 if (group_type
== IPV6_ADDR_ANY
) { /* general query */
1402 if (mlh2
->mld2q_nsrcs
)
1403 return -EINVAL
; /* no sources allowed */
1405 mld_gq_start_timer(idev
);
1408 /* mark sources to include, if group & source-specific */
1409 if (mlh2
->mld2q_nsrcs
!= 0) {
1410 if (!pskb_may_pull(skb
, srcs_offset
+
1411 ntohs(mlh2
->mld2q_nsrcs
) * sizeof(struct in6_addr
)))
1414 mlh2
= (struct mld2_query
*)skb_transport_header(skb
);
1421 read_lock_bh(&idev
->lock
);
1422 if (group_type
== IPV6_ADDR_ANY
) {
1423 for (ma
= idev
->mc_list
; ma
; ma
= ma
->next
) {
1424 spin_lock_bh(&ma
->mca_lock
);
1425 igmp6_group_queried(ma
, max_delay
);
1426 spin_unlock_bh(&ma
->mca_lock
);
1429 for (ma
= idev
->mc_list
; ma
; ma
= ma
->next
) {
1430 if (!ipv6_addr_equal(group
, &ma
->mca_addr
))
1432 spin_lock_bh(&ma
->mca_lock
);
1433 if (ma
->mca_flags
& MAF_TIMER_RUNNING
) {
1434 /* gsquery <- gsquery && mark */
1436 ma
->mca_flags
&= ~MAF_GSQUERY
;
1438 /* gsquery <- mark */
1440 ma
->mca_flags
|= MAF_GSQUERY
;
1442 ma
->mca_flags
&= ~MAF_GSQUERY
;
1444 if (!(ma
->mca_flags
& MAF_GSQUERY
) ||
1445 mld_marksources(ma
, ntohs(mlh2
->mld2q_nsrcs
), mlh2
->mld2q_srcs
))
1446 igmp6_group_queried(ma
, max_delay
);
1447 spin_unlock_bh(&ma
->mca_lock
);
1451 read_unlock_bh(&idev
->lock
);
1456 /* called with rcu_read_lock() */
1457 int igmp6_event_report(struct sk_buff
*skb
)
1459 struct ifmcaddr6
*ma
;
1460 struct inet6_dev
*idev
;
1461 struct mld_msg
*mld
;
1464 /* Our own report looped back. Ignore it. */
1465 if (skb
->pkt_type
== PACKET_LOOPBACK
)
1468 /* send our report if the MC router may not have heard this report */
1469 if (skb
->pkt_type
!= PACKET_MULTICAST
&&
1470 skb
->pkt_type
!= PACKET_BROADCAST
)
1473 if (!pskb_may_pull(skb
, sizeof(*mld
) - sizeof(struct icmp6hdr
)))
1476 mld
= (struct mld_msg
*)icmp6_hdr(skb
);
1478 /* Drop reports with not link local source */
1479 addr_type
= ipv6_addr_type(&ipv6_hdr(skb
)->saddr
);
1480 if (addr_type
!= IPV6_ADDR_ANY
&&
1481 !(addr_type
&IPV6_ADDR_LINKLOCAL
))
1484 idev
= __in6_dev_get(skb
->dev
);
1489 * Cancel the timer for this group
1492 read_lock_bh(&idev
->lock
);
1493 for (ma
= idev
->mc_list
; ma
; ma
= ma
->next
) {
1494 if (ipv6_addr_equal(&ma
->mca_addr
, &mld
->mld_mca
)) {
1495 spin_lock(&ma
->mca_lock
);
1496 if (del_timer(&ma
->mca_timer
))
1497 refcount_dec(&ma
->mca_refcnt
);
1498 ma
->mca_flags
&= ~(MAF_LAST_REPORTER
|MAF_TIMER_RUNNING
);
1499 spin_unlock(&ma
->mca_lock
);
1503 read_unlock_bh(&idev
->lock
);
1507 static bool is_in(struct ifmcaddr6
*pmc
, struct ip6_sf_list
*psf
, int type
,
1508 int gdeleted
, int sdeleted
)
1511 case MLD2_MODE_IS_INCLUDE
:
1512 case MLD2_MODE_IS_EXCLUDE
:
1513 if (gdeleted
|| sdeleted
)
1515 if (!((pmc
->mca_flags
& MAF_GSQUERY
) && !psf
->sf_gsresp
)) {
1516 if (pmc
->mca_sfmode
== MCAST_INCLUDE
)
1518 /* don't include if this source is excluded
1521 if (psf
->sf_count
[MCAST_INCLUDE
])
1522 return type
== MLD2_MODE_IS_INCLUDE
;
1523 return pmc
->mca_sfcount
[MCAST_EXCLUDE
] ==
1524 psf
->sf_count
[MCAST_EXCLUDE
];
1527 case MLD2_CHANGE_TO_INCLUDE
:
1528 if (gdeleted
|| sdeleted
)
1530 return psf
->sf_count
[MCAST_INCLUDE
] != 0;
1531 case MLD2_CHANGE_TO_EXCLUDE
:
1532 if (gdeleted
|| sdeleted
)
1534 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
] == 0 ||
1535 psf
->sf_count
[MCAST_INCLUDE
])
1537 return pmc
->mca_sfcount
[MCAST_EXCLUDE
] ==
1538 psf
->sf_count
[MCAST_EXCLUDE
];
1539 case MLD2_ALLOW_NEW_SOURCES
:
1540 if (gdeleted
|| !psf
->sf_crcount
)
1542 return (pmc
->mca_sfmode
== MCAST_INCLUDE
) ^ sdeleted
;
1543 case MLD2_BLOCK_OLD_SOURCES
:
1544 if (pmc
->mca_sfmode
== MCAST_INCLUDE
)
1545 return gdeleted
|| (psf
->sf_crcount
&& sdeleted
);
1546 return psf
->sf_crcount
&& !gdeleted
&& !sdeleted
;
1552 mld_scount(struct ifmcaddr6
*pmc
, int type
, int gdeleted
, int sdeleted
)
1554 struct ip6_sf_list
*psf
;
1557 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
1558 if (!is_in(pmc
, psf
, type
, gdeleted
, sdeleted
))
1565 static void ip6_mc_hdr(struct sock
*sk
, struct sk_buff
*skb
,
1566 struct net_device
*dev
,
1567 const struct in6_addr
*saddr
,
1568 const struct in6_addr
*daddr
,
1571 struct ipv6hdr
*hdr
;
1573 skb
->protocol
= htons(ETH_P_IPV6
);
1576 skb_reset_network_header(skb
);
1577 skb_put(skb
, sizeof(struct ipv6hdr
));
1578 hdr
= ipv6_hdr(skb
);
1580 ip6_flow_hdr(hdr
, 0, 0);
1582 hdr
->payload_len
= htons(len
);
1583 hdr
->nexthdr
= proto
;
1584 hdr
->hop_limit
= inet6_sk(sk
)->hop_limit
;
1586 hdr
->saddr
= *saddr
;
1587 hdr
->daddr
= *daddr
;
1590 static struct sk_buff
*mld_newpack(struct inet6_dev
*idev
, unsigned int mtu
)
1592 struct net_device
*dev
= idev
->dev
;
1593 struct net
*net
= dev_net(dev
);
1594 struct sock
*sk
= net
->ipv6
.igmp_sk
;
1595 struct sk_buff
*skb
;
1596 struct mld2_report
*pmr
;
1597 struct in6_addr addr_buf
;
1598 const struct in6_addr
*saddr
;
1599 int hlen
= LL_RESERVED_SPACE(dev
);
1600 int tlen
= dev
->needed_tailroom
;
1601 unsigned int size
= mtu
+ hlen
+ tlen
;
1603 u8 ra
[8] = { IPPROTO_ICMPV6
, 0,
1604 IPV6_TLV_ROUTERALERT
, 2, 0, 0,
1607 /* we assume size > sizeof(ra) here */
1608 /* limit our allocations to order-0 page */
1609 size
= min_t(int, size
, SKB_MAX_ORDER(0, 0));
1610 skb
= sock_alloc_send_skb(sk
, size
, 1, &err
);
1615 skb
->priority
= TC_PRIO_CONTROL
;
1616 skb_reserve(skb
, hlen
);
1617 skb_tailroom_reserve(skb
, mtu
, tlen
);
1619 if (__ipv6_get_lladdr(idev
, &addr_buf
, IFA_F_TENTATIVE
)) {
1620 /* <draft-ietf-magma-mld-source-05.txt>:
1621 * use unspecified address as the source address
1622 * when a valid link-local address is not available.
1624 saddr
= &in6addr_any
;
1628 ip6_mc_hdr(sk
, skb
, dev
, saddr
, &mld2_all_mcr
, NEXTHDR_HOP
, 0);
1630 skb_put_data(skb
, ra
, sizeof(ra
));
1632 skb_set_transport_header(skb
, skb_tail_pointer(skb
) - skb
->data
);
1633 skb_put(skb
, sizeof(*pmr
));
1634 pmr
= (struct mld2_report
*)skb_transport_header(skb
);
1635 pmr
->mld2r_type
= ICMPV6_MLD2_REPORT
;
1636 pmr
->mld2r_resv1
= 0;
1637 pmr
->mld2r_cksum
= 0;
1638 pmr
->mld2r_resv2
= 0;
1639 pmr
->mld2r_ngrec
= 0;
1643 static void mld_sendpack(struct sk_buff
*skb
)
1645 struct ipv6hdr
*pip6
= ipv6_hdr(skb
);
1646 struct mld2_report
*pmr
=
1647 (struct mld2_report
*)skb_transport_header(skb
);
1648 int payload_len
, mldlen
;
1649 struct inet6_dev
*idev
;
1650 struct net
*net
= dev_net(skb
->dev
);
1653 struct dst_entry
*dst
;
1656 idev
= __in6_dev_get(skb
->dev
);
1657 IP6_UPD_PO_STATS(net
, idev
, IPSTATS_MIB_OUT
, skb
->len
);
1659 payload_len
= (skb_tail_pointer(skb
) - skb_network_header(skb
)) -
1661 mldlen
= skb_tail_pointer(skb
) - skb_transport_header(skb
);
1662 pip6
->payload_len
= htons(payload_len
);
1664 pmr
->mld2r_cksum
= csum_ipv6_magic(&pip6
->saddr
, &pip6
->daddr
, mldlen
,
1666 csum_partial(skb_transport_header(skb
),
1669 icmpv6_flow_init(net
->ipv6
.igmp_sk
, &fl6
, ICMPV6_MLD2_REPORT
,
1670 &ipv6_hdr(skb
)->saddr
, &ipv6_hdr(skb
)->daddr
,
1672 dst
= icmp6_dst_alloc(skb
->dev
, &fl6
);
1679 skb_dst_set(skb
, dst
);
1683 err
= NF_HOOK(NFPROTO_IPV6
, NF_INET_LOCAL_OUT
,
1684 net
, net
->ipv6
.igmp_sk
, skb
, NULL
, skb
->dev
,
1688 ICMP6MSGOUT_INC_STATS(net
, idev
, ICMPV6_MLD2_REPORT
);
1689 ICMP6_INC_STATS(net
, idev
, ICMP6_MIB_OUTMSGS
);
1691 IP6_INC_STATS(net
, idev
, IPSTATS_MIB_OUTDISCARDS
);
1702 static int grec_size(struct ifmcaddr6
*pmc
, int type
, int gdel
, int sdel
)
1704 return sizeof(struct mld2_grec
) + 16 * mld_scount(pmc
,type
,gdel
,sdel
);
1707 static struct sk_buff
*add_grhead(struct sk_buff
*skb
, struct ifmcaddr6
*pmc
,
1708 int type
, struct mld2_grec
**ppgr
, unsigned int mtu
)
1710 struct mld2_report
*pmr
;
1711 struct mld2_grec
*pgr
;
1714 skb
= mld_newpack(pmc
->idev
, mtu
);
1718 pgr
= skb_put(skb
, sizeof(struct mld2_grec
));
1719 pgr
->grec_type
= type
;
1720 pgr
->grec_auxwords
= 0;
1721 pgr
->grec_nsrcs
= 0;
1722 pgr
->grec_mca
= pmc
->mca_addr
; /* structure copy */
1723 pmr
= (struct mld2_report
*)skb_transport_header(skb
);
1724 pmr
->mld2r_ngrec
= htons(ntohs(pmr
->mld2r_ngrec
)+1);
1729 #define AVAILABLE(skb) ((skb) ? skb_availroom(skb) : 0)
1731 static struct sk_buff
*add_grec(struct sk_buff
*skb
, struct ifmcaddr6
*pmc
,
1732 int type
, int gdeleted
, int sdeleted
, int crsend
)
1734 struct inet6_dev
*idev
= pmc
->idev
;
1735 struct net_device
*dev
= idev
->dev
;
1736 struct mld2_report
*pmr
;
1737 struct mld2_grec
*pgr
= NULL
;
1738 struct ip6_sf_list
*psf
, *psf_next
, *psf_prev
, **psf_list
;
1739 int scount
, stotal
, first
, isquery
, truncate
;
1742 if (pmc
->mca_flags
& MAF_NOREPORT
)
1745 mtu
= READ_ONCE(dev
->mtu
);
1746 if (mtu
< IPV6_MIN_MTU
)
1749 isquery
= type
== MLD2_MODE_IS_INCLUDE
||
1750 type
== MLD2_MODE_IS_EXCLUDE
;
1751 truncate
= type
== MLD2_MODE_IS_EXCLUDE
||
1752 type
== MLD2_CHANGE_TO_EXCLUDE
;
1754 stotal
= scount
= 0;
1756 psf_list
= sdeleted
? &pmc
->mca_tomb
: &pmc
->mca_sources
;
1761 pmr
= skb
? (struct mld2_report
*)skb_transport_header(skb
) : NULL
;
1763 /* EX and TO_EX get a fresh packet, if needed */
1765 if (pmr
&& pmr
->mld2r_ngrec
&&
1766 AVAILABLE(skb
) < grec_size(pmc
, type
, gdeleted
, sdeleted
)) {
1769 skb
= mld_newpack(idev
, mtu
);
1774 for (psf
= *psf_list
; psf
; psf
= psf_next
) {
1775 struct in6_addr
*psrc
;
1777 psf_next
= psf
->sf_next
;
1779 if (!is_in(pmc
, psf
, type
, gdeleted
, sdeleted
) && !crsend
) {
1784 /* Based on RFC3810 6.1. Should not send source-list change
1785 * records when there is a filter mode change.
1787 if (((gdeleted
&& pmc
->mca_sfmode
== MCAST_EXCLUDE
) ||
1788 (!gdeleted
&& pmc
->mca_crcount
)) &&
1789 (type
== MLD2_ALLOW_NEW_SOURCES
||
1790 type
== MLD2_BLOCK_OLD_SOURCES
) && psf
->sf_crcount
)
1791 goto decrease_sf_crcount
;
1793 /* clear marks on query responses */
1797 if (AVAILABLE(skb
) < sizeof(*psrc
) +
1798 first
*sizeof(struct mld2_grec
)) {
1799 if (truncate
&& !first
)
1800 break; /* truncate these */
1802 pgr
->grec_nsrcs
= htons(scount
);
1805 skb
= mld_newpack(idev
, mtu
);
1810 skb
= add_grhead(skb
, pmc
, type
, &pgr
, mtu
);
1815 psrc
= skb_put(skb
, sizeof(*psrc
));
1816 *psrc
= psf
->sf_addr
;
1818 if ((type
== MLD2_ALLOW_NEW_SOURCES
||
1819 type
== MLD2_BLOCK_OLD_SOURCES
) && psf
->sf_crcount
) {
1820 decrease_sf_crcount
:
1822 if ((sdeleted
|| gdeleted
) && psf
->sf_crcount
== 0) {
1824 psf_prev
->sf_next
= psf
->sf_next
;
1826 *psf_list
= psf
->sf_next
;
1836 if (type
== MLD2_ALLOW_NEW_SOURCES
||
1837 type
== MLD2_BLOCK_OLD_SOURCES
)
1839 if (pmc
->mca_crcount
|| isquery
|| crsend
) {
1840 /* make sure we have room for group header */
1841 if (skb
&& AVAILABLE(skb
) < sizeof(struct mld2_grec
)) {
1843 skb
= NULL
; /* add_grhead will get a new one */
1845 skb
= add_grhead(skb
, pmc
, type
, &pgr
, mtu
);
1849 pgr
->grec_nsrcs
= htons(scount
);
1852 pmc
->mca_flags
&= ~MAF_GSQUERY
; /* clear query state */
1856 static void mld_send_report(struct inet6_dev
*idev
, struct ifmcaddr6
*pmc
)
1858 struct sk_buff
*skb
= NULL
;
1861 read_lock_bh(&idev
->lock
);
1863 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
) {
1864 if (pmc
->mca_flags
& MAF_NOREPORT
)
1866 spin_lock_bh(&pmc
->mca_lock
);
1867 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
])
1868 type
= MLD2_MODE_IS_EXCLUDE
;
1870 type
= MLD2_MODE_IS_INCLUDE
;
1871 skb
= add_grec(skb
, pmc
, type
, 0, 0, 0);
1872 spin_unlock_bh(&pmc
->mca_lock
);
1875 spin_lock_bh(&pmc
->mca_lock
);
1876 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
])
1877 type
= MLD2_MODE_IS_EXCLUDE
;
1879 type
= MLD2_MODE_IS_INCLUDE
;
1880 skb
= add_grec(skb
, pmc
, type
, 0, 0, 0);
1881 spin_unlock_bh(&pmc
->mca_lock
);
1883 read_unlock_bh(&idev
->lock
);
1889 * remove zero-count source records from a source filter list
1891 static void mld_clear_zeros(struct ip6_sf_list
**ppsf
)
1893 struct ip6_sf_list
*psf_prev
, *psf_next
, *psf
;
1896 for (psf
= *ppsf
; psf
; psf
= psf_next
) {
1897 psf_next
= psf
->sf_next
;
1898 if (psf
->sf_crcount
== 0) {
1900 psf_prev
->sf_next
= psf
->sf_next
;
1902 *ppsf
= psf
->sf_next
;
1909 static void mld_send_cr(struct inet6_dev
*idev
)
1911 struct ifmcaddr6
*pmc
, *pmc_prev
, *pmc_next
;
1912 struct sk_buff
*skb
= NULL
;
1915 read_lock_bh(&idev
->lock
);
1916 spin_lock(&idev
->mc_lock
);
1920 for (pmc
= idev
->mc_tomb
; pmc
; pmc
= pmc_next
) {
1921 pmc_next
= pmc
->next
;
1922 if (pmc
->mca_sfmode
== MCAST_INCLUDE
) {
1923 type
= MLD2_BLOCK_OLD_SOURCES
;
1924 dtype
= MLD2_BLOCK_OLD_SOURCES
;
1925 skb
= add_grec(skb
, pmc
, type
, 1, 0, 0);
1926 skb
= add_grec(skb
, pmc
, dtype
, 1, 1, 0);
1928 if (pmc
->mca_crcount
) {
1929 if (pmc
->mca_sfmode
== MCAST_EXCLUDE
) {
1930 type
= MLD2_CHANGE_TO_INCLUDE
;
1931 skb
= add_grec(skb
, pmc
, type
, 1, 0, 0);
1934 if (pmc
->mca_crcount
== 0) {
1935 mld_clear_zeros(&pmc
->mca_tomb
);
1936 mld_clear_zeros(&pmc
->mca_sources
);
1939 if (pmc
->mca_crcount
== 0 && !pmc
->mca_tomb
&&
1940 !pmc
->mca_sources
) {
1942 pmc_prev
->next
= pmc_next
;
1944 idev
->mc_tomb
= pmc_next
;
1945 in6_dev_put(pmc
->idev
);
1950 spin_unlock(&idev
->mc_lock
);
1953 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
) {
1954 spin_lock_bh(&pmc
->mca_lock
);
1955 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
]) {
1956 type
= MLD2_BLOCK_OLD_SOURCES
;
1957 dtype
= MLD2_ALLOW_NEW_SOURCES
;
1959 type
= MLD2_ALLOW_NEW_SOURCES
;
1960 dtype
= MLD2_BLOCK_OLD_SOURCES
;
1962 skb
= add_grec(skb
, pmc
, type
, 0, 0, 0);
1963 skb
= add_grec(skb
, pmc
, dtype
, 0, 1, 0); /* deleted sources */
1965 /* filter mode changes */
1966 if (pmc
->mca_crcount
) {
1967 if (pmc
->mca_sfmode
== MCAST_EXCLUDE
)
1968 type
= MLD2_CHANGE_TO_EXCLUDE
;
1970 type
= MLD2_CHANGE_TO_INCLUDE
;
1971 skb
= add_grec(skb
, pmc
, type
, 0, 0, 0);
1974 spin_unlock_bh(&pmc
->mca_lock
);
1976 read_unlock_bh(&idev
->lock
);
1979 (void) mld_sendpack(skb
);
1982 static void igmp6_send(struct in6_addr
*addr
, struct net_device
*dev
, int type
)
1984 struct net
*net
= dev_net(dev
);
1985 struct sock
*sk
= net
->ipv6
.igmp_sk
;
1986 struct inet6_dev
*idev
;
1987 struct sk_buff
*skb
;
1988 struct mld_msg
*hdr
;
1989 const struct in6_addr
*snd_addr
, *saddr
;
1990 struct in6_addr addr_buf
;
1991 int hlen
= LL_RESERVED_SPACE(dev
);
1992 int tlen
= dev
->needed_tailroom
;
1993 int err
, len
, payload_len
, full_len
;
1994 u8 ra
[8] = { IPPROTO_ICMPV6
, 0,
1995 IPV6_TLV_ROUTERALERT
, 2, 0, 0,
1998 struct dst_entry
*dst
;
2000 if (type
== ICMPV6_MGM_REDUCTION
)
2001 snd_addr
= &in6addr_linklocal_allrouters
;
2005 len
= sizeof(struct icmp6hdr
) + sizeof(struct in6_addr
);
2006 payload_len
= len
+ sizeof(ra
);
2007 full_len
= sizeof(struct ipv6hdr
) + payload_len
;
2010 IP6_UPD_PO_STATS(net
, __in6_dev_get(dev
),
2011 IPSTATS_MIB_OUT
, full_len
);
2014 skb
= sock_alloc_send_skb(sk
, hlen
+ tlen
+ full_len
, 1, &err
);
2018 IP6_INC_STATS(net
, __in6_dev_get(dev
),
2019 IPSTATS_MIB_OUTDISCARDS
);
2023 skb
->priority
= TC_PRIO_CONTROL
;
2024 skb_reserve(skb
, hlen
);
2026 if (ipv6_get_lladdr(dev
, &addr_buf
, IFA_F_TENTATIVE
)) {
2027 /* <draft-ietf-magma-mld-source-05.txt>:
2028 * use unspecified address as the source address
2029 * when a valid link-local address is not available.
2031 saddr
= &in6addr_any
;
2035 ip6_mc_hdr(sk
, skb
, dev
, saddr
, snd_addr
, NEXTHDR_HOP
, payload_len
);
2037 skb_put_data(skb
, ra
, sizeof(ra
));
2039 hdr
= skb_put_zero(skb
, sizeof(struct mld_msg
));
2040 hdr
->mld_type
= type
;
2041 hdr
->mld_mca
= *addr
;
2043 hdr
->mld_cksum
= csum_ipv6_magic(saddr
, snd_addr
, len
,
2045 csum_partial(hdr
, len
, 0));
2048 idev
= __in6_dev_get(skb
->dev
);
2050 icmpv6_flow_init(sk
, &fl6
, type
,
2051 &ipv6_hdr(skb
)->saddr
, &ipv6_hdr(skb
)->daddr
,
2053 dst
= icmp6_dst_alloc(skb
->dev
, &fl6
);
2059 skb_dst_set(skb
, dst
);
2060 err
= NF_HOOK(NFPROTO_IPV6
, NF_INET_LOCAL_OUT
,
2061 net
, sk
, skb
, NULL
, skb
->dev
,
2065 ICMP6MSGOUT_INC_STATS(net
, idev
, type
);
2066 ICMP6_INC_STATS(net
, idev
, ICMP6_MIB_OUTMSGS
);
2068 IP6_INC_STATS(net
, idev
, IPSTATS_MIB_OUTDISCARDS
);
2078 static void mld_send_initial_cr(struct inet6_dev
*idev
)
2080 struct sk_buff
*skb
;
2081 struct ifmcaddr6
*pmc
;
2084 if (mld_in_v1_mode(idev
))
2088 read_lock_bh(&idev
->lock
);
2089 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
) {
2090 spin_lock_bh(&pmc
->mca_lock
);
2091 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
])
2092 type
= MLD2_CHANGE_TO_EXCLUDE
;
2094 type
= MLD2_ALLOW_NEW_SOURCES
;
2095 skb
= add_grec(skb
, pmc
, type
, 0, 0, 1);
2096 spin_unlock_bh(&pmc
->mca_lock
);
2098 read_unlock_bh(&idev
->lock
);
2103 void ipv6_mc_dad_complete(struct inet6_dev
*idev
)
2105 idev
->mc_dad_count
= idev
->mc_qrv
;
2106 if (idev
->mc_dad_count
) {
2107 mld_send_initial_cr(idev
);
2108 idev
->mc_dad_count
--;
2109 if (idev
->mc_dad_count
)
2110 mld_dad_start_timer(idev
,
2111 unsolicited_report_interval(idev
));
2115 static void mld_dad_timer_expire(struct timer_list
*t
)
2117 struct inet6_dev
*idev
= from_timer(idev
, t
, mc_dad_timer
);
2119 mld_send_initial_cr(idev
);
2120 if (idev
->mc_dad_count
) {
2121 idev
->mc_dad_count
--;
2122 if (idev
->mc_dad_count
)
2123 mld_dad_start_timer(idev
,
2124 unsolicited_report_interval(idev
));
2129 static int ip6_mc_del1_src(struct ifmcaddr6
*pmc
, int sfmode
,
2130 const struct in6_addr
*psfsrc
)
2132 struct ip6_sf_list
*psf
, *psf_prev
;
2136 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
2137 if (ipv6_addr_equal(&psf
->sf_addr
, psfsrc
))
2141 if (!psf
|| psf
->sf_count
[sfmode
] == 0) {
2142 /* source filter not found, or count wrong => bug */
2145 psf
->sf_count
[sfmode
]--;
2146 if (!psf
->sf_count
[MCAST_INCLUDE
] && !psf
->sf_count
[MCAST_EXCLUDE
]) {
2147 struct inet6_dev
*idev
= pmc
->idev
;
2149 /* no more filters for this source */
2151 psf_prev
->sf_next
= psf
->sf_next
;
2153 pmc
->mca_sources
= psf
->sf_next
;
2154 if (psf
->sf_oldin
&& !(pmc
->mca_flags
& MAF_NOREPORT
) &&
2155 !mld_in_v1_mode(idev
)) {
2156 psf
->sf_crcount
= idev
->mc_qrv
;
2157 psf
->sf_next
= pmc
->mca_tomb
;
2158 pmc
->mca_tomb
= psf
;
2166 static int ip6_mc_del_src(struct inet6_dev
*idev
, const struct in6_addr
*pmca
,
2167 int sfmode
, int sfcount
, const struct in6_addr
*psfsrc
,
2170 struct ifmcaddr6
*pmc
;
2176 read_lock_bh(&idev
->lock
);
2177 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
) {
2178 if (ipv6_addr_equal(pmca
, &pmc
->mca_addr
))
2182 /* MCA not found?? bug */
2183 read_unlock_bh(&idev
->lock
);
2186 spin_lock_bh(&pmc
->mca_lock
);
2189 if (!pmc
->mca_sfcount
[sfmode
]) {
2190 spin_unlock_bh(&pmc
->mca_lock
);
2191 read_unlock_bh(&idev
->lock
);
2194 pmc
->mca_sfcount
[sfmode
]--;
2197 for (i
= 0; i
< sfcount
; i
++) {
2198 int rv
= ip6_mc_del1_src(pmc
, sfmode
, &psfsrc
[i
]);
2200 changerec
|= rv
> 0;
2204 if (pmc
->mca_sfmode
== MCAST_EXCLUDE
&&
2205 pmc
->mca_sfcount
[MCAST_EXCLUDE
] == 0 &&
2206 pmc
->mca_sfcount
[MCAST_INCLUDE
]) {
2207 struct ip6_sf_list
*psf
;
2209 /* filter mode change */
2210 pmc
->mca_sfmode
= MCAST_INCLUDE
;
2211 pmc
->mca_crcount
= idev
->mc_qrv
;
2212 idev
->mc_ifc_count
= pmc
->mca_crcount
;
2213 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
)
2214 psf
->sf_crcount
= 0;
2215 mld_ifc_event(pmc
->idev
);
2216 } else if (sf_setstate(pmc
) || changerec
)
2217 mld_ifc_event(pmc
->idev
);
2218 spin_unlock_bh(&pmc
->mca_lock
);
2219 read_unlock_bh(&idev
->lock
);
2224 * Add multicast single-source filter to the interface list
2226 static int ip6_mc_add1_src(struct ifmcaddr6
*pmc
, int sfmode
,
2227 const struct in6_addr
*psfsrc
)
2229 struct ip6_sf_list
*psf
, *psf_prev
;
2232 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
2233 if (ipv6_addr_equal(&psf
->sf_addr
, psfsrc
))
2238 psf
= kzalloc(sizeof(*psf
), GFP_ATOMIC
);
2242 psf
->sf_addr
= *psfsrc
;
2244 psf_prev
->sf_next
= psf
;
2246 pmc
->mca_sources
= psf
;
2248 psf
->sf_count
[sfmode
]++;
2252 static void sf_markstate(struct ifmcaddr6
*pmc
)
2254 struct ip6_sf_list
*psf
;
2255 int mca_xcount
= pmc
->mca_sfcount
[MCAST_EXCLUDE
];
2257 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
)
2258 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
]) {
2259 psf
->sf_oldin
= mca_xcount
==
2260 psf
->sf_count
[MCAST_EXCLUDE
] &&
2261 !psf
->sf_count
[MCAST_INCLUDE
];
2263 psf
->sf_oldin
= psf
->sf_count
[MCAST_INCLUDE
] != 0;
2266 static int sf_setstate(struct ifmcaddr6
*pmc
)
2268 struct ip6_sf_list
*psf
, *dpsf
;
2269 int mca_xcount
= pmc
->mca_sfcount
[MCAST_EXCLUDE
];
2270 int qrv
= pmc
->idev
->mc_qrv
;
2274 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
) {
2275 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
]) {
2276 new_in
= mca_xcount
== psf
->sf_count
[MCAST_EXCLUDE
] &&
2277 !psf
->sf_count
[MCAST_INCLUDE
];
2279 new_in
= psf
->sf_count
[MCAST_INCLUDE
] != 0;
2281 if (!psf
->sf_oldin
) {
2282 struct ip6_sf_list
*prev
= NULL
;
2284 for (dpsf
= pmc
->mca_tomb
; dpsf
;
2285 dpsf
= dpsf
->sf_next
) {
2286 if (ipv6_addr_equal(&dpsf
->sf_addr
,
2293 prev
->sf_next
= dpsf
->sf_next
;
2295 pmc
->mca_tomb
= dpsf
->sf_next
;
2298 psf
->sf_crcount
= qrv
;
2301 } else if (psf
->sf_oldin
) {
2302 psf
->sf_crcount
= 0;
2304 * add or update "delete" records if an active filter
2307 for (dpsf
= pmc
->mca_tomb
; dpsf
; dpsf
= dpsf
->sf_next
)
2308 if (ipv6_addr_equal(&dpsf
->sf_addr
,
2312 dpsf
= kmalloc(sizeof(*dpsf
), GFP_ATOMIC
);
2316 /* pmc->mca_lock held by callers */
2317 dpsf
->sf_next
= pmc
->mca_tomb
;
2318 pmc
->mca_tomb
= dpsf
;
2320 dpsf
->sf_crcount
= qrv
;
2328 * Add multicast source filter list to the interface list
2330 static int ip6_mc_add_src(struct inet6_dev
*idev
, const struct in6_addr
*pmca
,
2331 int sfmode
, int sfcount
, const struct in6_addr
*psfsrc
,
2334 struct ifmcaddr6
*pmc
;
2340 read_lock_bh(&idev
->lock
);
2341 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
) {
2342 if (ipv6_addr_equal(pmca
, &pmc
->mca_addr
))
2346 /* MCA not found?? bug */
2347 read_unlock_bh(&idev
->lock
);
2350 spin_lock_bh(&pmc
->mca_lock
);
2353 isexclude
= pmc
->mca_sfmode
== MCAST_EXCLUDE
;
2355 pmc
->mca_sfcount
[sfmode
]++;
2357 for (i
= 0; i
< sfcount
; i
++) {
2358 err
= ip6_mc_add1_src(pmc
, sfmode
, &psfsrc
[i
]);
2366 pmc
->mca_sfcount
[sfmode
]--;
2367 for (j
= 0; j
< i
; j
++)
2368 ip6_mc_del1_src(pmc
, sfmode
, &psfsrc
[j
]);
2369 } else if (isexclude
!= (pmc
->mca_sfcount
[MCAST_EXCLUDE
] != 0)) {
2370 struct ip6_sf_list
*psf
;
2372 /* filter mode change */
2373 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
])
2374 pmc
->mca_sfmode
= MCAST_EXCLUDE
;
2375 else if (pmc
->mca_sfcount
[MCAST_INCLUDE
])
2376 pmc
->mca_sfmode
= MCAST_INCLUDE
;
2377 /* else no filters; keep old mode for reports */
2379 pmc
->mca_crcount
= idev
->mc_qrv
;
2380 idev
->mc_ifc_count
= pmc
->mca_crcount
;
2381 for (psf
= pmc
->mca_sources
; psf
; psf
= psf
->sf_next
)
2382 psf
->sf_crcount
= 0;
2383 mld_ifc_event(idev
);
2384 } else if (sf_setstate(pmc
))
2385 mld_ifc_event(idev
);
2386 spin_unlock_bh(&pmc
->mca_lock
);
2387 read_unlock_bh(&idev
->lock
);
2391 static void ip6_mc_clear_src(struct ifmcaddr6
*pmc
)
2393 struct ip6_sf_list
*psf
, *nextpsf
;
2395 for (psf
= pmc
->mca_tomb
; psf
; psf
= nextpsf
) {
2396 nextpsf
= psf
->sf_next
;
2399 pmc
->mca_tomb
= NULL
;
2400 for (psf
= pmc
->mca_sources
; psf
; psf
= nextpsf
) {
2401 nextpsf
= psf
->sf_next
;
2404 pmc
->mca_sources
= NULL
;
2405 pmc
->mca_sfmode
= MCAST_EXCLUDE
;
2406 pmc
->mca_sfcount
[MCAST_INCLUDE
] = 0;
2407 pmc
->mca_sfcount
[MCAST_EXCLUDE
] = 1;
2411 static void igmp6_join_group(struct ifmcaddr6
*ma
)
2413 unsigned long delay
;
2415 if (ma
->mca_flags
& MAF_NOREPORT
)
2418 igmp6_send(&ma
->mca_addr
, ma
->idev
->dev
, ICMPV6_MGM_REPORT
);
2420 delay
= prandom_u32() % unsolicited_report_interval(ma
->idev
);
2422 spin_lock_bh(&ma
->mca_lock
);
2423 if (del_timer(&ma
->mca_timer
)) {
2424 refcount_dec(&ma
->mca_refcnt
);
2425 delay
= ma
->mca_timer
.expires
- jiffies
;
2428 if (!mod_timer(&ma
->mca_timer
, jiffies
+ delay
))
2429 refcount_inc(&ma
->mca_refcnt
);
2430 ma
->mca_flags
|= MAF_TIMER_RUNNING
| MAF_LAST_REPORTER
;
2431 spin_unlock_bh(&ma
->mca_lock
);
2434 static int ip6_mc_leave_src(struct sock
*sk
, struct ipv6_mc_socklist
*iml
,
2435 struct inet6_dev
*idev
)
2439 /* callers have the socket lock and rtnl lock
2440 * so no other readers or writers of iml or its sflist
2443 /* any-source empty exclude case */
2444 return ip6_mc_del_src(idev
, &iml
->addr
, iml
->sfmode
, 0, NULL
, 0);
2446 err
= ip6_mc_del_src(idev
, &iml
->addr
, iml
->sfmode
,
2447 iml
->sflist
->sl_count
, iml
->sflist
->sl_addr
, 0);
2448 sock_kfree_s(sk
, iml
->sflist
, IP6_SFLSIZE(iml
->sflist
->sl_max
));
2453 static void igmp6_leave_group(struct ifmcaddr6
*ma
)
2455 if (mld_in_v1_mode(ma
->idev
)) {
2456 if (ma
->mca_flags
& MAF_LAST_REPORTER
)
2457 igmp6_send(&ma
->mca_addr
, ma
->idev
->dev
,
2458 ICMPV6_MGM_REDUCTION
);
2460 mld_add_delrec(ma
->idev
, ma
);
2461 mld_ifc_event(ma
->idev
);
2465 static void mld_gq_timer_expire(struct timer_list
*t
)
2467 struct inet6_dev
*idev
= from_timer(idev
, t
, mc_gq_timer
);
2469 idev
->mc_gq_running
= 0;
2470 mld_send_report(idev
, NULL
);
2474 static void mld_ifc_timer_expire(struct timer_list
*t
)
2476 struct inet6_dev
*idev
= from_timer(idev
, t
, mc_ifc_timer
);
2479 if (idev
->mc_ifc_count
) {
2480 idev
->mc_ifc_count
--;
2481 if (idev
->mc_ifc_count
)
2482 mld_ifc_start_timer(idev
,
2483 unsolicited_report_interval(idev
));
2488 static void mld_ifc_event(struct inet6_dev
*idev
)
2490 if (mld_in_v1_mode(idev
))
2492 idev
->mc_ifc_count
= idev
->mc_qrv
;
2493 mld_ifc_start_timer(idev
, 1);
2496 static void igmp6_timer_handler(struct timer_list
*t
)
2498 struct ifmcaddr6
*ma
= from_timer(ma
, t
, mca_timer
);
2500 if (mld_in_v1_mode(ma
->idev
))
2501 igmp6_send(&ma
->mca_addr
, ma
->idev
->dev
, ICMPV6_MGM_REPORT
);
2503 mld_send_report(ma
->idev
, ma
);
2505 spin_lock(&ma
->mca_lock
);
2506 ma
->mca_flags
|= MAF_LAST_REPORTER
;
2507 ma
->mca_flags
&= ~MAF_TIMER_RUNNING
;
2508 spin_unlock(&ma
->mca_lock
);
2512 /* Device changing type */
2514 void ipv6_mc_unmap(struct inet6_dev
*idev
)
2516 struct ifmcaddr6
*i
;
2518 /* Install multicast list, except for all-nodes (already installed) */
2520 read_lock_bh(&idev
->lock
);
2521 for (i
= idev
->mc_list
; i
; i
= i
->next
)
2522 igmp6_group_dropped(i
);
2523 read_unlock_bh(&idev
->lock
);
2526 void ipv6_mc_remap(struct inet6_dev
*idev
)
2531 /* Device going down */
2533 void ipv6_mc_down(struct inet6_dev
*idev
)
2535 struct ifmcaddr6
*i
;
2537 /* Withdraw multicast list */
2539 read_lock_bh(&idev
->lock
);
2541 for (i
= idev
->mc_list
; i
; i
= i
->next
)
2542 igmp6_group_dropped(i
);
2544 /* Should stop timer after group drop. or we will
2545 * start timer again in mld_ifc_event()
2547 mld_ifc_stop_timer(idev
);
2548 mld_gq_stop_timer(idev
);
2549 mld_dad_stop_timer(idev
);
2550 read_unlock_bh(&idev
->lock
);
2553 static void ipv6_mc_reset(struct inet6_dev
*idev
)
2555 idev
->mc_qrv
= sysctl_mld_qrv
;
2556 idev
->mc_qi
= MLD_QI_DEFAULT
;
2557 idev
->mc_qri
= MLD_QRI_DEFAULT
;
2558 idev
->mc_v1_seen
= 0;
2559 idev
->mc_maxdelay
= unsolicited_report_interval(idev
);
2562 /* Device going up */
2564 void ipv6_mc_up(struct inet6_dev
*idev
)
2566 struct ifmcaddr6
*i
;
2568 /* Install multicast list, except for all-nodes (already installed) */
2570 read_lock_bh(&idev
->lock
);
2571 ipv6_mc_reset(idev
);
2572 for (i
= idev
->mc_list
; i
; i
= i
->next
) {
2573 mld_del_delrec(idev
, i
);
2574 igmp6_group_added(i
, i
->mca_sfmode
);
2576 read_unlock_bh(&idev
->lock
);
2579 /* IPv6 device initialization. */
2581 void ipv6_mc_init_dev(struct inet6_dev
*idev
)
2583 write_lock_bh(&idev
->lock
);
2584 spin_lock_init(&idev
->mc_lock
);
2585 idev
->mc_gq_running
= 0;
2586 timer_setup(&idev
->mc_gq_timer
, mld_gq_timer_expire
, 0);
2587 idev
->mc_tomb
= NULL
;
2588 idev
->mc_ifc_count
= 0;
2589 timer_setup(&idev
->mc_ifc_timer
, mld_ifc_timer_expire
, 0);
2590 timer_setup(&idev
->mc_dad_timer
, mld_dad_timer_expire
, 0);
2591 ipv6_mc_reset(idev
);
2592 write_unlock_bh(&idev
->lock
);
2596 * Device is about to be destroyed: clean up.
2599 void ipv6_mc_destroy_dev(struct inet6_dev
*idev
)
2601 struct ifmcaddr6
*i
;
2603 /* Deactivate timers */
2605 mld_clear_delrec(idev
);
2607 /* Delete all-nodes address. */
2608 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2609 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2612 __ipv6_dev_mc_dec(idev
, &in6addr_linklocal_allnodes
);
2614 if (idev
->cnf
.forwarding
)
2615 __ipv6_dev_mc_dec(idev
, &in6addr_linklocal_allrouters
);
2617 write_lock_bh(&idev
->lock
);
2618 while ((i
= idev
->mc_list
) != NULL
) {
2619 idev
->mc_list
= i
->next
;
2621 write_unlock_bh(&idev
->lock
);
2623 write_lock_bh(&idev
->lock
);
2625 write_unlock_bh(&idev
->lock
);
2628 static void ipv6_mc_rejoin_groups(struct inet6_dev
*idev
)
2630 struct ifmcaddr6
*pmc
;
2634 if (mld_in_v1_mode(idev
)) {
2635 read_lock_bh(&idev
->lock
);
2636 for (pmc
= idev
->mc_list
; pmc
; pmc
= pmc
->next
)
2637 igmp6_join_group(pmc
);
2638 read_unlock_bh(&idev
->lock
);
2640 mld_send_report(idev
, NULL
);
2643 static int ipv6_mc_netdev_event(struct notifier_block
*this,
2644 unsigned long event
,
2647 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
2648 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2651 case NETDEV_RESEND_IGMP
:
2653 ipv6_mc_rejoin_groups(idev
);
2662 static struct notifier_block igmp6_netdev_notifier
= {
2663 .notifier_call
= ipv6_mc_netdev_event
,
2666 #ifdef CONFIG_PROC_FS
2667 struct igmp6_mc_iter_state
{
2668 struct seq_net_private p
;
2669 struct net_device
*dev
;
2670 struct inet6_dev
*idev
;
2673 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2675 static inline struct ifmcaddr6
*igmp6_mc_get_first(struct seq_file
*seq
)
2677 struct ifmcaddr6
*im
= NULL
;
2678 struct igmp6_mc_iter_state
*state
= igmp6_mc_seq_private(seq
);
2679 struct net
*net
= seq_file_net(seq
);
2682 for_each_netdev_rcu(net
, state
->dev
) {
2683 struct inet6_dev
*idev
;
2684 idev
= __in6_dev_get(state
->dev
);
2687 read_lock_bh(&idev
->lock
);
2693 read_unlock_bh(&idev
->lock
);
2698 static struct ifmcaddr6
*igmp6_mc_get_next(struct seq_file
*seq
, struct ifmcaddr6
*im
)
2700 struct igmp6_mc_iter_state
*state
= igmp6_mc_seq_private(seq
);
2704 if (likely(state
->idev
))
2705 read_unlock_bh(&state
->idev
->lock
);
2707 state
->dev
= next_net_device_rcu(state
->dev
);
2712 state
->idev
= __in6_dev_get(state
->dev
);
2715 read_lock_bh(&state
->idev
->lock
);
2716 im
= state
->idev
->mc_list
;
2721 static struct ifmcaddr6
*igmp6_mc_get_idx(struct seq_file
*seq
, loff_t pos
)
2723 struct ifmcaddr6
*im
= igmp6_mc_get_first(seq
);
2725 while (pos
&& (im
= igmp6_mc_get_next(seq
, im
)) != NULL
)
2727 return pos
? NULL
: im
;
2730 static void *igmp6_mc_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2734 return igmp6_mc_get_idx(seq
, *pos
);
2737 static void *igmp6_mc_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2739 struct ifmcaddr6
*im
= igmp6_mc_get_next(seq
, v
);
2745 static void igmp6_mc_seq_stop(struct seq_file
*seq
, void *v
)
2748 struct igmp6_mc_iter_state
*state
= igmp6_mc_seq_private(seq
);
2750 if (likely(state
->idev
)) {
2751 read_unlock_bh(&state
->idev
->lock
);
2758 static int igmp6_mc_seq_show(struct seq_file
*seq
, void *v
)
2760 struct ifmcaddr6
*im
= (struct ifmcaddr6
*)v
;
2761 struct igmp6_mc_iter_state
*state
= igmp6_mc_seq_private(seq
);
2764 "%-4d %-15s %pi6 %5d %08X %ld\n",
2765 state
->dev
->ifindex
, state
->dev
->name
,
2767 im
->mca_users
, im
->mca_flags
,
2768 (im
->mca_flags
&MAF_TIMER_RUNNING
) ?
2769 jiffies_to_clock_t(im
->mca_timer
.expires
-jiffies
) : 0);
2773 static const struct seq_operations igmp6_mc_seq_ops
= {
2774 .start
= igmp6_mc_seq_start
,
2775 .next
= igmp6_mc_seq_next
,
2776 .stop
= igmp6_mc_seq_stop
,
2777 .show
= igmp6_mc_seq_show
,
2780 struct igmp6_mcf_iter_state
{
2781 struct seq_net_private p
;
2782 struct net_device
*dev
;
2783 struct inet6_dev
*idev
;
2784 struct ifmcaddr6
*im
;
2787 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2789 static inline struct ip6_sf_list
*igmp6_mcf_get_first(struct seq_file
*seq
)
2791 struct ip6_sf_list
*psf
= NULL
;
2792 struct ifmcaddr6
*im
= NULL
;
2793 struct igmp6_mcf_iter_state
*state
= igmp6_mcf_seq_private(seq
);
2794 struct net
*net
= seq_file_net(seq
);
2798 for_each_netdev_rcu(net
, state
->dev
) {
2799 struct inet6_dev
*idev
;
2800 idev
= __in6_dev_get(state
->dev
);
2801 if (unlikely(idev
== NULL
))
2803 read_lock_bh(&idev
->lock
);
2806 spin_lock_bh(&im
->mca_lock
);
2807 psf
= im
->mca_sources
;
2813 spin_unlock_bh(&im
->mca_lock
);
2815 read_unlock_bh(&idev
->lock
);
2820 static struct ip6_sf_list
*igmp6_mcf_get_next(struct seq_file
*seq
, struct ip6_sf_list
*psf
)
2822 struct igmp6_mcf_iter_state
*state
= igmp6_mcf_seq_private(seq
);
2826 spin_unlock_bh(&state
->im
->mca_lock
);
2827 state
->im
= state
->im
->next
;
2828 while (!state
->im
) {
2829 if (likely(state
->idev
))
2830 read_unlock_bh(&state
->idev
->lock
);
2832 state
->dev
= next_net_device_rcu(state
->dev
);
2837 state
->idev
= __in6_dev_get(state
->dev
);
2840 read_lock_bh(&state
->idev
->lock
);
2841 state
->im
= state
->idev
->mc_list
;
2845 spin_lock_bh(&state
->im
->mca_lock
);
2846 psf
= state
->im
->mca_sources
;
2852 static struct ip6_sf_list
*igmp6_mcf_get_idx(struct seq_file
*seq
, loff_t pos
)
2854 struct ip6_sf_list
*psf
= igmp6_mcf_get_first(seq
);
2856 while (pos
&& (psf
= igmp6_mcf_get_next(seq
, psf
)) != NULL
)
2858 return pos
? NULL
: psf
;
2861 static void *igmp6_mcf_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2865 return *pos
? igmp6_mcf_get_idx(seq
, *pos
- 1) : SEQ_START_TOKEN
;
2868 static void *igmp6_mcf_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2870 struct ip6_sf_list
*psf
;
2871 if (v
== SEQ_START_TOKEN
)
2872 psf
= igmp6_mcf_get_first(seq
);
2874 psf
= igmp6_mcf_get_next(seq
, v
);
2879 static void igmp6_mcf_seq_stop(struct seq_file
*seq
, void *v
)
2882 struct igmp6_mcf_iter_state
*state
= igmp6_mcf_seq_private(seq
);
2883 if (likely(state
->im
)) {
2884 spin_unlock_bh(&state
->im
->mca_lock
);
2887 if (likely(state
->idev
)) {
2888 read_unlock_bh(&state
->idev
->lock
);
2895 static int igmp6_mcf_seq_show(struct seq_file
*seq
, void *v
)
2897 struct ip6_sf_list
*psf
= (struct ip6_sf_list
*)v
;
2898 struct igmp6_mcf_iter_state
*state
= igmp6_mcf_seq_private(seq
);
2900 if (v
== SEQ_START_TOKEN
) {
2901 seq_puts(seq
, "Idx Device Multicast Address Source Address INC EXC\n");
2904 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
2905 state
->dev
->ifindex
, state
->dev
->name
,
2906 &state
->im
->mca_addr
,
2908 psf
->sf_count
[MCAST_INCLUDE
],
2909 psf
->sf_count
[MCAST_EXCLUDE
]);
2914 static const struct seq_operations igmp6_mcf_seq_ops
= {
2915 .start
= igmp6_mcf_seq_start
,
2916 .next
= igmp6_mcf_seq_next
,
2917 .stop
= igmp6_mcf_seq_stop
,
2918 .show
= igmp6_mcf_seq_show
,
2921 static int __net_init
igmp6_proc_init(struct net
*net
)
2926 if (!proc_create_net("igmp6", 0444, net
->proc_net
, &igmp6_mc_seq_ops
,
2927 sizeof(struct igmp6_mc_iter_state
)))
2929 if (!proc_create_net("mcfilter6", 0444, net
->proc_net
,
2931 sizeof(struct igmp6_mcf_iter_state
)))
2932 goto out_proc_net_igmp6
;
2939 remove_proc_entry("igmp6", net
->proc_net
);
2943 static void __net_exit
igmp6_proc_exit(struct net
*net
)
2945 remove_proc_entry("mcfilter6", net
->proc_net
);
2946 remove_proc_entry("igmp6", net
->proc_net
);
2949 static inline int igmp6_proc_init(struct net
*net
)
2953 static inline void igmp6_proc_exit(struct net
*net
)
2958 static int __net_init
igmp6_net_init(struct net
*net
)
2962 err
= inet_ctl_sock_create(&net
->ipv6
.igmp_sk
, PF_INET6
,
2963 SOCK_RAW
, IPPROTO_ICMPV6
, net
);
2965 pr_err("Failed to initialize the IGMP6 control socket (err %d)\n",
2970 inet6_sk(net
->ipv6
.igmp_sk
)->hop_limit
= 1;
2972 err
= inet_ctl_sock_create(&net
->ipv6
.mc_autojoin_sk
, PF_INET6
,
2973 SOCK_RAW
, IPPROTO_ICMPV6
, net
);
2975 pr_err("Failed to initialize the IGMP6 autojoin socket (err %d)\n",
2977 goto out_sock_create
;
2980 err
= igmp6_proc_init(net
);
2982 goto out_sock_create_autojoin
;
2986 out_sock_create_autojoin
:
2987 inet_ctl_sock_destroy(net
->ipv6
.mc_autojoin_sk
);
2989 inet_ctl_sock_destroy(net
->ipv6
.igmp_sk
);
2994 static void __net_exit
igmp6_net_exit(struct net
*net
)
2996 inet_ctl_sock_destroy(net
->ipv6
.igmp_sk
);
2997 inet_ctl_sock_destroy(net
->ipv6
.mc_autojoin_sk
);
2998 igmp6_proc_exit(net
);
3001 static struct pernet_operations igmp6_net_ops
= {
3002 .init
= igmp6_net_init
,
3003 .exit
= igmp6_net_exit
,
3006 int __init
igmp6_init(void)
3008 return register_pernet_subsys(&igmp6_net_ops
);
3011 int __init
igmp6_late_init(void)
3013 return register_netdevice_notifier(&igmp6_netdev_notifier
);
3016 void igmp6_cleanup(void)
3018 unregister_pernet_subsys(&igmp6_net_ops
);
3021 void igmp6_late_cleanup(void)
3023 unregister_netdevice_notifier(&igmp6_netdev_notifier
);