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>
49 #include <linux/netfilter.h>
50 #include <linux/netfilter_ipv6.h>
52 #include <net/net_namespace.h>
57 #include <net/protocol.h>
58 #include <net/if_inet6.h>
59 #include <net/ndisc.h>
60 #include <net/addrconf.h>
61 #include <net/ip6_route.h>
62 #include <net/inet_common.h>
64 #include <net/ip6_checksum.h>
66 /* Set to 3 to get tracing... */
70 #define MDBG(x) printk x
75 /* Ensure that we have struct in6_addr aligned on 32bit word. */
76 static void *__mld2_query_bugs[] __attribute__((__unused__)) = {
77 BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4),
78 BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4),
79 BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4)
82 static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
84 /* Big mc list lock for all the sockets */
85 static DEFINE_SPINLOCK(ipv6_sk_mc_lock);
87 static void igmp6_join_group(struct ifmcaddr6 *ma);
88 static void igmp6_leave_group(struct ifmcaddr6 *ma);
89 static void igmp6_timer_handler(unsigned long data);
91 static void mld_gq_timer_expire(unsigned long data);
92 static void mld_ifc_timer_expire(unsigned long data);
93 static void mld_ifc_event(struct inet6_dev *idev);
94 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
95 static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr);
96 static void mld_clear_delrec(struct inet6_dev *idev);
97 static int sf_setstate(struct ifmcaddr6 *pmc);
98 static void sf_markstate(struct ifmcaddr6 *pmc);
99 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
100 static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
101 int sfmode, int sfcount, const struct in6_addr *psfsrc,
103 static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
104 int sfmode, int sfcount, const struct in6_addr *psfsrc,
106 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
107 struct inet6_dev *idev);
110 #define IGMP6_UNSOLICITED_IVAL (10*HZ)
111 #define MLD_QRV_DEFAULT 2
113 #define MLD_V1_SEEN(idev) (dev_net((idev)->dev)->ipv6.devconf_all->force_mld_version == 1 || \
114 (idev)->cnf.force_mld_version == 1 || \
115 ((idev)->mc_v1_seen && \
116 time_before(jiffies, (idev)->mc_v1_seen)))
118 #define IPV6_MLD_MAX_MSF 64
120 int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
123 * socket join on multicast group
126 #define for_each_pmc_rcu(np, pmc) \
127 for (pmc = rcu_dereference(np->ipv6_mc_list); \
129 pmc = rcu_dereference(pmc->next))
131 int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
133 struct net_device *dev = NULL;
134 struct ipv6_mc_socklist *mc_lst;
135 struct ipv6_pinfo *np = inet6_sk(sk);
136 struct net *net = sock_net(sk);
139 if (!ipv6_addr_is_multicast(addr))
143 for_each_pmc_rcu(np, mc_lst) {
144 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
145 ipv6_addr_equal(&mc_lst->addr, addr)) {
152 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
158 mc_lst->addr = *addr;
163 rt = rt6_lookup(net, addr, NULL, 0, 0);
166 dst_release(&rt->dst);
169 dev = dev_get_by_index_rcu(net, ifindex);
173 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
177 mc_lst->ifindex = dev->ifindex;
178 mc_lst->sfmode = MCAST_EXCLUDE;
179 rwlock_init(&mc_lst->sflock);
180 mc_lst->sflist = NULL;
183 * now add/increase the group membership on the device
186 err = ipv6_dev_mc_inc(dev, addr);
190 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
194 spin_lock(&ipv6_sk_mc_lock);
195 mc_lst->next = np->ipv6_mc_list;
196 rcu_assign_pointer(np->ipv6_mc_list, mc_lst);
197 spin_unlock(&ipv6_sk_mc_lock);
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);
214 spin_lock(&ipv6_sk_mc_lock);
215 for (lnk = &np->ipv6_mc_list;
216 (mc_lst = rcu_dereference_protected(*lnk,
217 lockdep_is_held(&ipv6_sk_mc_lock))) !=NULL ;
218 lnk = &mc_lst->next) {
219 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
220 ipv6_addr_equal(&mc_lst->addr, addr)) {
221 struct net_device *dev;
224 spin_unlock(&ipv6_sk_mc_lock);
227 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
229 struct inet6_dev *idev = __in6_dev_get(dev);
231 (void) ip6_mc_leave_src(sk, mc_lst, idev);
233 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
235 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
237 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
238 kfree_rcu(mc_lst, rcu);
242 spin_unlock(&ipv6_sk_mc_lock);
244 return -EADDRNOTAVAIL;
247 /* called with rcu_read_lock() */
248 static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net,
249 const struct in6_addr *group,
252 struct net_device *dev = NULL;
253 struct inet6_dev *idev = NULL;
256 struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0);
261 dst_release(&rt->dst);
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);
285 spin_lock(&ipv6_sk_mc_lock);
286 while ((mc_lst = rcu_dereference_protected(np->ipv6_mc_list,
287 lockdep_is_held(&ipv6_sk_mc_lock))) != NULL) {
288 struct net_device *dev;
290 np->ipv6_mc_list = mc_lst->next;
291 spin_unlock(&ipv6_sk_mc_lock);
294 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
296 struct inet6_dev *idev = __in6_dev_get(dev);
298 (void) ip6_mc_leave_src(sk, mc_lst, idev);
300 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
302 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
305 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
306 kfree_rcu(mc_lst, rcu);
308 spin_lock(&ipv6_sk_mc_lock);
310 spin_unlock(&ipv6_sk_mc_lock);
313 int ip6_mc_source(int add, int omode, struct sock *sk,
314 struct group_source_req *pgsr)
316 struct in6_addr *source, *group;
317 struct ipv6_mc_socklist *pmc;
318 struct inet6_dev *idev;
319 struct ipv6_pinfo *inet6 = inet6_sk(sk);
320 struct ip6_sf_socklist *psl;
321 struct net *net = sock_net(sk);
327 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
328 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
330 if (!ipv6_addr_is_multicast(group))
334 idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface);
340 err = -EADDRNOTAVAIL;
342 for_each_pmc_rcu(inet6, pmc) {
343 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
345 if (ipv6_addr_equal(&pmc->addr, group))
348 if (!pmc) { /* must have a prior join */
352 /* if a source filter was set, must be the same mode as before */
354 if (pmc->sfmode != omode) {
358 } else if (pmc->sfmode != omode) {
359 /* allow mode switches for empty-set filters */
360 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
361 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
365 write_lock(&pmc->sflock);
371 goto done; /* err = -EADDRNOTAVAIL */
373 for (i=0; i<psl->sl_count; i++) {
374 rv = memcmp(&psl->sl_addr[i], source,
375 sizeof(struct in6_addr));
379 if (rv) /* source not found */
380 goto done; /* err = -EADDRNOTAVAIL */
382 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
383 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
388 /* update the interface filter */
389 ip6_mc_del_src(idev, group, omode, 1, source, 1);
391 for (j=i+1; j<psl->sl_count; j++)
392 psl->sl_addr[j-1] = psl->sl_addr[j];
397 /* else, add a new source to the filter */
399 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
403 if (!psl || psl->sl_count == psl->sl_max) {
404 struct ip6_sf_socklist *newpsl;
405 int count = IP6_SFBLOCK;
408 count += psl->sl_max;
409 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
414 newpsl->sl_max = count;
415 newpsl->sl_count = count - IP6_SFBLOCK;
417 for (i=0; i<psl->sl_count; i++)
418 newpsl->sl_addr[i] = psl->sl_addr[i];
419 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
421 pmc->sflist = psl = newpsl;
423 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
424 for (i=0; i<psl->sl_count; i++) {
425 rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr));
429 if (rv == 0) /* address already there is an error */
431 for (j=psl->sl_count-1; j>=i; j--)
432 psl->sl_addr[j+1] = psl->sl_addr[j];
433 psl->sl_addr[i] = *source;
436 /* update the interface list */
437 ip6_mc_add_src(idev, group, omode, 1, source, 1);
440 write_unlock(&pmc->sflock);
441 read_unlock_bh(&idev->lock);
444 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
448 int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
450 const struct in6_addr *group;
451 struct ipv6_mc_socklist *pmc;
452 struct inet6_dev *idev;
453 struct ipv6_pinfo *inet6 = inet6_sk(sk);
454 struct ip6_sf_socklist *newpsl, *psl;
455 struct net *net = sock_net(sk);
459 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
461 if (!ipv6_addr_is_multicast(group))
463 if (gsf->gf_fmode != MCAST_INCLUDE &&
464 gsf->gf_fmode != MCAST_EXCLUDE)
468 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
477 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
482 for_each_pmc_rcu(inet6, pmc) {
483 if (pmc->ifindex != gsf->gf_interface)
485 if (ipv6_addr_equal(&pmc->addr, group))
488 if (!pmc) { /* must have a prior join */
492 if (gsf->gf_numsrc) {
493 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
499 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
500 for (i=0; i<newpsl->sl_count; ++i) {
501 struct sockaddr_in6 *psin6;
503 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
504 newpsl->sl_addr[i] = psin6->sin6_addr;
506 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
507 newpsl->sl_count, newpsl->sl_addr, 0);
509 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
514 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
517 write_lock(&pmc->sflock);
520 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
521 psl->sl_count, psl->sl_addr, 0);
522 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
524 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
525 pmc->sflist = newpsl;
526 pmc->sfmode = gsf->gf_fmode;
527 write_unlock(&pmc->sflock);
530 read_unlock_bh(&idev->lock);
533 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
537 int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
538 struct group_filter __user *optval, int __user *optlen)
540 int err, i, count, copycount;
541 const struct in6_addr *group;
542 struct ipv6_mc_socklist *pmc;
543 struct inet6_dev *idev;
544 struct ipv6_pinfo *inet6 = inet6_sk(sk);
545 struct ip6_sf_socklist *psl;
546 struct net *net = sock_net(sk);
548 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
550 if (!ipv6_addr_is_multicast(group))
554 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
561 err = -EADDRNOTAVAIL;
563 * changes to the ipv6_mc_list require the socket lock and
564 * a read lock on ip6_sk_mc_lock. We have the socket lock,
565 * so reading the list is safe.
568 for_each_pmc_rcu(inet6, pmc) {
569 if (pmc->ifindex != gsf->gf_interface)
571 if (ipv6_addr_equal(group, &pmc->addr))
574 if (!pmc) /* must have a prior join */
576 gsf->gf_fmode = pmc->sfmode;
578 count = psl ? psl->sl_count : 0;
579 read_unlock_bh(&idev->lock);
582 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
583 gsf->gf_numsrc = count;
584 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
585 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
588 /* changes to psl require the socket lock, a read lock on
589 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
590 * 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 int 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 ma_put(struct ifmcaddr6 *mc)
651 if (atomic_dec_and_test(&mc->mca_refcnt)) {
652 in6_dev_put(mc->idev);
657 static void igmp6_group_added(struct ifmcaddr6 *mc)
659 struct net_device *dev = mc->idev->dev;
660 char buf[MAX_ADDR_LEN];
662 spin_lock_bh(&mc->mca_lock);
663 if (!(mc->mca_flags&MAF_LOADED)) {
664 mc->mca_flags |= MAF_LOADED;
665 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
666 dev_mc_add(dev, buf);
668 spin_unlock_bh(&mc->mca_lock);
670 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
673 if (MLD_V1_SEEN(mc->idev)) {
674 igmp6_join_group(mc);
679 mc->mca_crcount = mc->idev->mc_qrv;
680 mld_ifc_event(mc->idev);
683 static void igmp6_group_dropped(struct ifmcaddr6 *mc)
685 struct net_device *dev = mc->idev->dev;
686 char buf[MAX_ADDR_LEN];
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);
816 * device multicast group inc (add if not found)
818 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
820 struct ifmcaddr6 *mc;
821 struct inet6_dev *idev;
823 /* we need to take a reference on idev */
824 idev = in6_dev_get(dev);
829 write_lock_bh(&idev->lock);
831 write_unlock_bh(&idev->lock);
836 for (mc = idev->mc_list; mc; mc = mc->next) {
837 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
839 write_unlock_bh(&idev->lock);
840 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
848 * not found: create a new one.
851 mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
854 write_unlock_bh(&idev->lock);
859 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
861 mc->mca_addr = *addr;
862 mc->idev = idev; /* (reference taken) */
864 /* mca_stamp should be updated upon changes */
865 mc->mca_cstamp = mc->mca_tstamp = jiffies;
866 atomic_set(&mc->mca_refcnt, 2);
867 spin_lock_init(&mc->mca_lock);
869 /* initial mode is (EX, empty) */
870 mc->mca_sfmode = MCAST_EXCLUDE;
871 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
873 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
874 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
875 mc->mca_flags |= MAF_NOREPORT;
877 mc->next = idev->mc_list;
879 write_unlock_bh(&idev->lock);
881 mld_del_delrec(idev, &mc->mca_addr);
882 igmp6_group_added(mc);
888 * device multicast group del
890 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
892 struct ifmcaddr6 *ma, **map;
894 write_lock_bh(&idev->lock);
895 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
896 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
897 if (--ma->mca_users == 0) {
899 write_unlock_bh(&idev->lock);
901 igmp6_group_dropped(ma);
906 write_unlock_bh(&idev->lock);
910 write_unlock_bh(&idev->lock);
915 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
917 struct inet6_dev *idev;
922 idev = __in6_dev_get(dev);
926 err = __ipv6_dev_mc_dec(idev, addr);
933 * identify MLD packets for MLD filter exceptions
935 int ipv6_is_mld(struct sk_buff *skb, int nexthdr)
937 struct icmp6hdr *pic;
939 if (nexthdr != IPPROTO_ICMPV6)
942 if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
945 pic = icmp6_hdr(skb);
947 switch (pic->icmp6_type) {
948 case ICMPV6_MGM_QUERY:
949 case ICMPV6_MGM_REPORT:
950 case ICMPV6_MGM_REDUCTION:
951 case ICMPV6_MLD2_REPORT:
960 * check if the interface/address pair is valid
962 int 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 = 1; /* don't filter unspecified source */
996 read_unlock_bh(&idev->lock);
1002 static void mld_gq_start_timer(struct inet6_dev *idev)
1004 int tv = net_random() % idev->mc_maxdelay;
1006 idev->mc_gq_running = 1;
1007 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1011 static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
1013 int tv = net_random() % delay;
1015 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1020 * IGMP handling (alias multicast ICMPv6 messages)
1023 static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1025 unsigned long delay = resptime;
1027 /* Do not start timer for these addresses */
1028 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1029 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1032 if (del_timer(&ma->mca_timer)) {
1033 atomic_dec(&ma->mca_refcnt);
1034 delay = ma->mca_timer.expires - jiffies;
1037 if (delay >= resptime) {
1039 delay = net_random() % resptime;
1043 ma->mca_timer.expires = jiffies + delay;
1044 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1045 atomic_inc(&ma->mca_refcnt);
1046 ma->mca_flags |= MAF_TIMER_RUNNING;
1049 /* mark EXCLUDE-mode sources */
1050 static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
1051 const struct in6_addr *srcs)
1053 struct ip6_sf_list *psf;
1057 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1058 if (scount == nsrcs)
1060 for (i=0; i<nsrcs; i++) {
1061 /* skip inactive filters */
1062 if (psf->sf_count[MCAST_INCLUDE] ||
1063 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1064 psf->sf_count[MCAST_EXCLUDE])
1066 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1072 pmc->mca_flags &= ~MAF_GSQUERY;
1073 if (scount == nsrcs) /* all sources excluded */
1078 static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1079 const struct in6_addr *srcs)
1081 struct ip6_sf_list *psf;
1084 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1085 return mld_xmarksources(pmc, nsrcs, srcs);
1087 /* mark INCLUDE-mode sources */
1090 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1091 if (scount == nsrcs)
1093 for (i=0; i<nsrcs; i++) {
1094 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1102 pmc->mca_flags &= ~MAF_GSQUERY;
1105 pmc->mca_flags |= MAF_GSQUERY;
1109 /* called with rcu_read_lock() */
1110 int igmp6_event_query(struct sk_buff *skb)
1112 struct mld2_query *mlh2 = NULL;
1113 struct ifmcaddr6 *ma;
1114 const struct in6_addr *group;
1115 unsigned long max_delay;
1116 struct inet6_dev *idev;
1117 struct mld_msg *mld;
1122 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1125 /* compute payload length excluding extension headers */
1126 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
1127 len -= skb_network_header_len(skb);
1129 /* Drop queries with not link local source */
1130 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
1133 idev = __in6_dev_get(skb->dev);
1138 mld = (struct mld_msg *)icmp6_hdr(skb);
1139 group = &mld->mld_mca;
1140 group_type = ipv6_addr_type(group);
1142 if (group_type != IPV6_ADDR_ANY &&
1143 !(group_type&IPV6_ADDR_MULTICAST))
1148 /* MLDv1 router present */
1150 /* Translate milliseconds to jiffies */
1151 max_delay = (ntohs(mld->mld_maxdelay)*HZ)/1000;
1153 switchback = (idev->mc_qrv + 1) * max_delay;
1154 idev->mc_v1_seen = jiffies + switchback;
1156 /* cancel the interface change timer */
1157 idev->mc_ifc_count = 0;
1158 if (del_timer(&idev->mc_ifc_timer))
1159 __in6_dev_put(idev);
1160 /* clear deleted report items */
1161 mld_clear_delrec(idev);
1162 } else if (len >= 28) {
1163 int srcs_offset = sizeof(struct mld2_query) -
1164 sizeof(struct icmp6hdr);
1165 if (!pskb_may_pull(skb, srcs_offset))
1168 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1169 max_delay = (MLDV2_MRC(ntohs(mlh2->mld2q_mrc))*HZ)/1000;
1172 idev->mc_maxdelay = max_delay;
1173 if (mlh2->mld2q_qrv)
1174 idev->mc_qrv = mlh2->mld2q_qrv;
1175 if (group_type == IPV6_ADDR_ANY) { /* general query */
1176 if (mlh2->mld2q_nsrcs)
1177 return -EINVAL; /* no sources allowed */
1179 mld_gq_start_timer(idev);
1182 /* mark sources to include, if group & source-specific */
1183 if (mlh2->mld2q_nsrcs != 0) {
1184 if (!pskb_may_pull(skb, srcs_offset +
1185 ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr)))
1188 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1194 read_lock_bh(&idev->lock);
1195 if (group_type == IPV6_ADDR_ANY) {
1196 for (ma = idev->mc_list; ma; ma=ma->next) {
1197 spin_lock_bh(&ma->mca_lock);
1198 igmp6_group_queried(ma, max_delay);
1199 spin_unlock_bh(&ma->mca_lock);
1202 for (ma = idev->mc_list; ma; ma=ma->next) {
1203 if (!ipv6_addr_equal(group, &ma->mca_addr))
1205 spin_lock_bh(&ma->mca_lock);
1206 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1207 /* gsquery <- gsquery && mark */
1209 ma->mca_flags &= ~MAF_GSQUERY;
1211 /* gsquery <- mark */
1213 ma->mca_flags |= MAF_GSQUERY;
1215 ma->mca_flags &= ~MAF_GSQUERY;
1217 if (!(ma->mca_flags & MAF_GSQUERY) ||
1218 mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs))
1219 igmp6_group_queried(ma, max_delay);
1220 spin_unlock_bh(&ma->mca_lock);
1224 read_unlock_bh(&idev->lock);
1229 /* called with rcu_read_lock() */
1230 int igmp6_event_report(struct sk_buff *skb)
1232 struct ifmcaddr6 *ma;
1233 struct inet6_dev *idev;
1234 struct mld_msg *mld;
1237 /* Our own report looped back. Ignore it. */
1238 if (skb->pkt_type == PACKET_LOOPBACK)
1241 /* send our report if the MC router may not have heard this report */
1242 if (skb->pkt_type != PACKET_MULTICAST &&
1243 skb->pkt_type != PACKET_BROADCAST)
1246 if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr)))
1249 mld = (struct mld_msg *)icmp6_hdr(skb);
1251 /* Drop reports with not link local source */
1252 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
1253 if (addr_type != IPV6_ADDR_ANY &&
1254 !(addr_type&IPV6_ADDR_LINKLOCAL))
1257 idev = __in6_dev_get(skb->dev);
1262 * Cancel the timer for this group
1265 read_lock_bh(&idev->lock);
1266 for (ma = idev->mc_list; ma; ma=ma->next) {
1267 if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) {
1268 spin_lock(&ma->mca_lock);
1269 if (del_timer(&ma->mca_timer))
1270 atomic_dec(&ma->mca_refcnt);
1271 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1272 spin_unlock(&ma->mca_lock);
1276 read_unlock_bh(&idev->lock);
1280 static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1281 int gdeleted, int sdeleted)
1284 case MLD2_MODE_IS_INCLUDE:
1285 case MLD2_MODE_IS_EXCLUDE:
1286 if (gdeleted || sdeleted)
1288 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1289 if (pmc->mca_sfmode == MCAST_INCLUDE)
1291 /* don't include if this source is excluded
1294 if (psf->sf_count[MCAST_INCLUDE])
1295 return type == MLD2_MODE_IS_INCLUDE;
1296 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1297 psf->sf_count[MCAST_EXCLUDE];
1300 case MLD2_CHANGE_TO_INCLUDE:
1301 if (gdeleted || sdeleted)
1303 return psf->sf_count[MCAST_INCLUDE] != 0;
1304 case MLD2_CHANGE_TO_EXCLUDE:
1305 if (gdeleted || sdeleted)
1307 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1308 psf->sf_count[MCAST_INCLUDE])
1310 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1311 psf->sf_count[MCAST_EXCLUDE];
1312 case MLD2_ALLOW_NEW_SOURCES:
1313 if (gdeleted || !psf->sf_crcount)
1315 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1316 case MLD2_BLOCK_OLD_SOURCES:
1317 if (pmc->mca_sfmode == MCAST_INCLUDE)
1318 return gdeleted || (psf->sf_crcount && sdeleted);
1319 return psf->sf_crcount && !gdeleted && !sdeleted;
1325 mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1327 struct ip6_sf_list *psf;
1330 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1331 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1338 static struct sk_buff *mld_newpack(struct net_device *dev, int size)
1340 struct net *net = dev_net(dev);
1341 struct sock *sk = net->ipv6.igmp_sk;
1342 struct sk_buff *skb;
1343 struct mld2_report *pmr;
1344 struct in6_addr addr_buf;
1345 const struct in6_addr *saddr;
1346 int hlen = LL_RESERVED_SPACE(dev);
1347 int tlen = dev->needed_tailroom;
1349 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1350 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1353 /* we assume size > sizeof(ra) here */
1354 size += hlen + tlen;
1355 /* limit our allocations to order-0 page */
1356 size = min_t(int, size, SKB_MAX_ORDER(0, 0));
1357 skb = sock_alloc_send_skb(sk, size, 1, &err);
1362 skb_reserve(skb, hlen);
1364 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1365 /* <draft-ietf-magma-mld-source-05.txt>:
1366 * use unspecified address as the source address
1367 * when a valid link-local address is not available.
1369 saddr = &in6addr_any;
1373 ip6_nd_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0);
1375 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1377 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
1378 skb_put(skb, sizeof(*pmr));
1379 pmr = (struct mld2_report *)skb_transport_header(skb);
1380 pmr->mld2r_type = ICMPV6_MLD2_REPORT;
1381 pmr->mld2r_resv1 = 0;
1382 pmr->mld2r_cksum = 0;
1383 pmr->mld2r_resv2 = 0;
1384 pmr->mld2r_ngrec = 0;
1388 static void mld_sendpack(struct sk_buff *skb)
1390 struct ipv6hdr *pip6 = ipv6_hdr(skb);
1391 struct mld2_report *pmr =
1392 (struct mld2_report *)skb_transport_header(skb);
1393 int payload_len, mldlen;
1394 struct inet6_dev *idev;
1395 struct net *net = dev_net(skb->dev);
1398 struct dst_entry *dst;
1401 idev = __in6_dev_get(skb->dev);
1402 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
1404 payload_len = (skb->tail - skb->network_header) - sizeof(*pip6);
1405 mldlen = skb->tail - skb->transport_header;
1406 pip6->payload_len = htons(payload_len);
1408 pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1410 csum_partial(skb_transport_header(skb),
1413 icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT,
1414 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1416 dst = icmp6_dst_alloc(skb->dev, NULL, &fl6);
1423 skb_dst_set(skb, dst);
1427 payload_len = skb->len;
1429 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1433 ICMP6MSGOUT_INC_STATS_BH(net, idev, ICMPV6_MLD2_REPORT);
1434 ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS);
1435 IP6_UPD_PO_STATS_BH(net, idev, IPSTATS_MIB_OUTMCAST, payload_len);
1437 IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_OUTDISCARDS);
1447 static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1449 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
1452 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1453 int type, struct mld2_grec **ppgr)
1455 struct net_device *dev = pmc->idev->dev;
1456 struct mld2_report *pmr;
1457 struct mld2_grec *pgr;
1460 skb = mld_newpack(dev, dev->mtu);
1463 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1464 pgr->grec_type = type;
1465 pgr->grec_auxwords = 0;
1466 pgr->grec_nsrcs = 0;
1467 pgr->grec_mca = pmc->mca_addr; /* structure copy */
1468 pmr = (struct mld2_report *)skb_transport_header(skb);
1469 pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1);
1474 #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1475 skb_tailroom(skb)) : 0)
1477 static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1478 int type, int gdeleted, int sdeleted)
1480 struct net_device *dev = pmc->idev->dev;
1481 struct mld2_report *pmr;
1482 struct mld2_grec *pgr = NULL;
1483 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
1484 int scount, stotal, first, isquery, truncate;
1486 if (pmc->mca_flags & MAF_NOREPORT)
1489 isquery = type == MLD2_MODE_IS_INCLUDE ||
1490 type == MLD2_MODE_IS_EXCLUDE;
1491 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1492 type == MLD2_CHANGE_TO_EXCLUDE;
1494 stotal = scount = 0;
1496 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1501 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
1503 /* EX and TO_EX get a fresh packet, if needed */
1505 if (pmr && pmr->mld2r_ngrec &&
1506 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1509 skb = mld_newpack(dev, dev->mtu);
1514 for (psf=*psf_list; psf; psf=psf_next) {
1515 struct in6_addr *psrc;
1517 psf_next = psf->sf_next;
1519 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1524 /* clear marks on query responses */
1528 if (AVAILABLE(skb) < sizeof(*psrc) +
1529 first*sizeof(struct mld2_grec)) {
1530 if (truncate && !first)
1531 break; /* truncate these */
1533 pgr->grec_nsrcs = htons(scount);
1536 skb = mld_newpack(dev, dev->mtu);
1541 skb = add_grhead(skb, pmc, type, &pgr);
1546 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1547 *psrc = psf->sf_addr;
1549 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1550 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1552 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1554 psf_prev->sf_next = psf->sf_next;
1556 *psf_list = psf->sf_next;
1566 if (type == MLD2_ALLOW_NEW_SOURCES ||
1567 type == MLD2_BLOCK_OLD_SOURCES)
1569 if (pmc->mca_crcount || isquery) {
1570 /* make sure we have room for group header */
1571 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1573 skb = NULL; /* add_grhead will get a new one */
1575 skb = add_grhead(skb, pmc, type, &pgr);
1579 pgr->grec_nsrcs = htons(scount);
1582 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1586 static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1588 struct sk_buff *skb = NULL;
1592 read_lock_bh(&idev->lock);
1593 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1594 if (pmc->mca_flags & MAF_NOREPORT)
1596 spin_lock_bh(&pmc->mca_lock);
1597 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1598 type = MLD2_MODE_IS_EXCLUDE;
1600 type = MLD2_MODE_IS_INCLUDE;
1601 skb = add_grec(skb, pmc, type, 0, 0);
1602 spin_unlock_bh(&pmc->mca_lock);
1604 read_unlock_bh(&idev->lock);
1606 spin_lock_bh(&pmc->mca_lock);
1607 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1608 type = MLD2_MODE_IS_EXCLUDE;
1610 type = MLD2_MODE_IS_INCLUDE;
1611 skb = add_grec(skb, pmc, type, 0, 0);
1612 spin_unlock_bh(&pmc->mca_lock);
1619 * remove zero-count source records from a source filter list
1621 static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1623 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1626 for (psf=*ppsf; psf; psf = psf_next) {
1627 psf_next = psf->sf_next;
1628 if (psf->sf_crcount == 0) {
1630 psf_prev->sf_next = psf->sf_next;
1632 *ppsf = psf->sf_next;
1639 static void mld_send_cr(struct inet6_dev *idev)
1641 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1642 struct sk_buff *skb = NULL;
1645 read_lock_bh(&idev->lock);
1646 spin_lock(&idev->mc_lock);
1650 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1651 pmc_next = pmc->next;
1652 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1653 type = MLD2_BLOCK_OLD_SOURCES;
1654 dtype = MLD2_BLOCK_OLD_SOURCES;
1655 skb = add_grec(skb, pmc, type, 1, 0);
1656 skb = add_grec(skb, pmc, dtype, 1, 1);
1658 if (pmc->mca_crcount) {
1659 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1660 type = MLD2_CHANGE_TO_INCLUDE;
1661 skb = add_grec(skb, pmc, type, 1, 0);
1664 if (pmc->mca_crcount == 0) {
1665 mld_clear_zeros(&pmc->mca_tomb);
1666 mld_clear_zeros(&pmc->mca_sources);
1669 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1670 !pmc->mca_sources) {
1672 pmc_prev->next = pmc_next;
1674 idev->mc_tomb = pmc_next;
1675 in6_dev_put(pmc->idev);
1680 spin_unlock(&idev->mc_lock);
1683 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1684 spin_lock_bh(&pmc->mca_lock);
1685 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1686 type = MLD2_BLOCK_OLD_SOURCES;
1687 dtype = MLD2_ALLOW_NEW_SOURCES;
1689 type = MLD2_ALLOW_NEW_SOURCES;
1690 dtype = MLD2_BLOCK_OLD_SOURCES;
1692 skb = add_grec(skb, pmc, type, 0, 0);
1693 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1695 /* filter mode changes */
1696 if (pmc->mca_crcount) {
1697 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1698 type = MLD2_CHANGE_TO_EXCLUDE;
1700 type = MLD2_CHANGE_TO_INCLUDE;
1701 skb = add_grec(skb, pmc, type, 0, 0);
1704 spin_unlock_bh(&pmc->mca_lock);
1706 read_unlock_bh(&idev->lock);
1709 (void) mld_sendpack(skb);
1712 static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1714 struct net *net = dev_net(dev);
1715 struct sock *sk = net->ipv6.igmp_sk;
1716 struct inet6_dev *idev;
1717 struct sk_buff *skb;
1718 struct mld_msg *hdr;
1719 const struct in6_addr *snd_addr, *saddr;
1720 struct in6_addr addr_buf;
1721 int hlen = LL_RESERVED_SPACE(dev);
1722 int tlen = dev->needed_tailroom;
1723 int err, len, payload_len, full_len;
1724 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1725 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1728 struct dst_entry *dst;
1730 if (type == ICMPV6_MGM_REDUCTION)
1731 snd_addr = &in6addr_linklocal_allrouters;
1735 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1736 payload_len = len + sizeof(ra);
1737 full_len = sizeof(struct ipv6hdr) + payload_len;
1740 IP6_UPD_PO_STATS(net, __in6_dev_get(dev),
1741 IPSTATS_MIB_OUT, full_len);
1744 skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err);
1748 IP6_INC_STATS(net, __in6_dev_get(dev),
1749 IPSTATS_MIB_OUTDISCARDS);
1754 skb_reserve(skb, hlen);
1756 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1757 /* <draft-ietf-magma-mld-source-05.txt>:
1758 * use unspecified address as the source address
1759 * when a valid link-local address is not available.
1761 saddr = &in6addr_any;
1765 ip6_nd_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len);
1767 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1769 hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg));
1770 memset(hdr, 0, sizeof(struct mld_msg));
1771 hdr->mld_type = type;
1772 hdr->mld_mca = *addr;
1774 hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len,
1776 csum_partial(hdr, len, 0));
1779 idev = __in6_dev_get(skb->dev);
1781 icmpv6_flow_init(sk, &fl6, type,
1782 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1784 dst = icmp6_dst_alloc(skb->dev, NULL, &fl6);
1790 skb_dst_set(skb, dst);
1791 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1795 ICMP6MSGOUT_INC_STATS(net, idev, type);
1796 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
1797 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len);
1799 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
1809 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
1810 const struct in6_addr *psfsrc)
1812 struct ip6_sf_list *psf, *psf_prev;
1816 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1817 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1821 if (!psf || psf->sf_count[sfmode] == 0) {
1822 /* source filter not found, or count wrong => bug */
1825 psf->sf_count[sfmode]--;
1826 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1827 struct inet6_dev *idev = pmc->idev;
1829 /* no more filters for this source */
1831 psf_prev->sf_next = psf->sf_next;
1833 pmc->mca_sources = psf->sf_next;
1834 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1835 !MLD_V1_SEEN(idev)) {
1836 psf->sf_crcount = idev->mc_qrv;
1837 psf->sf_next = pmc->mca_tomb;
1838 pmc->mca_tomb = psf;
1846 static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
1847 int sfmode, int sfcount, const struct in6_addr *psfsrc,
1850 struct ifmcaddr6 *pmc;
1856 read_lock_bh(&idev->lock);
1857 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1858 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1862 /* MCA not found?? bug */
1863 read_unlock_bh(&idev->lock);
1866 spin_lock_bh(&pmc->mca_lock);
1869 if (!pmc->mca_sfcount[sfmode]) {
1870 spin_unlock_bh(&pmc->mca_lock);
1871 read_unlock_bh(&idev->lock);
1874 pmc->mca_sfcount[sfmode]--;
1877 for (i=0; i<sfcount; i++) {
1878 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1880 changerec |= rv > 0;
1884 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1885 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1886 pmc->mca_sfcount[MCAST_INCLUDE]) {
1887 struct ip6_sf_list *psf;
1889 /* filter mode change */
1890 pmc->mca_sfmode = MCAST_INCLUDE;
1891 pmc->mca_crcount = idev->mc_qrv;
1892 idev->mc_ifc_count = pmc->mca_crcount;
1893 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1894 psf->sf_crcount = 0;
1895 mld_ifc_event(pmc->idev);
1896 } else if (sf_setstate(pmc) || changerec)
1897 mld_ifc_event(pmc->idev);
1898 spin_unlock_bh(&pmc->mca_lock);
1899 read_unlock_bh(&idev->lock);
1904 * Add multicast single-source filter to the interface list
1906 static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
1907 const struct in6_addr *psfsrc)
1909 struct ip6_sf_list *psf, *psf_prev;
1912 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1913 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1918 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
1922 psf->sf_addr = *psfsrc;
1924 psf_prev->sf_next = psf;
1926 pmc->mca_sources = psf;
1928 psf->sf_count[sfmode]++;
1932 static void sf_markstate(struct ifmcaddr6 *pmc)
1934 struct ip6_sf_list *psf;
1935 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1937 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1938 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1939 psf->sf_oldin = mca_xcount ==
1940 psf->sf_count[MCAST_EXCLUDE] &&
1941 !psf->sf_count[MCAST_INCLUDE];
1943 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
1946 static int sf_setstate(struct ifmcaddr6 *pmc)
1948 struct ip6_sf_list *psf, *dpsf;
1949 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1950 int qrv = pmc->idev->mc_qrv;
1954 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1955 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1956 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
1957 !psf->sf_count[MCAST_INCLUDE];
1959 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
1961 if (!psf->sf_oldin) {
1962 struct ip6_sf_list *prev = NULL;
1964 for (dpsf=pmc->mca_tomb; dpsf;
1965 dpsf=dpsf->sf_next) {
1966 if (ipv6_addr_equal(&dpsf->sf_addr,
1973 prev->sf_next = dpsf->sf_next;
1975 pmc->mca_tomb = dpsf->sf_next;
1978 psf->sf_crcount = qrv;
1981 } else if (psf->sf_oldin) {
1982 psf->sf_crcount = 0;
1984 * add or update "delete" records if an active filter
1987 for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
1988 if (ipv6_addr_equal(&dpsf->sf_addr,
1992 dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
1996 /* pmc->mca_lock held by callers */
1997 dpsf->sf_next = pmc->mca_tomb;
1998 pmc->mca_tomb = dpsf;
2000 dpsf->sf_crcount = qrv;
2008 * Add multicast source filter list to the interface list
2010 static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2011 int sfmode, int sfcount, const struct in6_addr *psfsrc,
2014 struct ifmcaddr6 *pmc;
2020 read_lock_bh(&idev->lock);
2021 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2022 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2026 /* MCA not found?? bug */
2027 read_unlock_bh(&idev->lock);
2030 spin_lock_bh(&pmc->mca_lock);
2033 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2035 pmc->mca_sfcount[sfmode]++;
2037 for (i=0; i<sfcount; i++) {
2038 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]);
2046 pmc->mca_sfcount[sfmode]--;
2048 (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
2049 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
2050 struct ip6_sf_list *psf;
2052 /* filter mode change */
2053 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2054 pmc->mca_sfmode = MCAST_EXCLUDE;
2055 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2056 pmc->mca_sfmode = MCAST_INCLUDE;
2057 /* else no filters; keep old mode for reports */
2059 pmc->mca_crcount = idev->mc_qrv;
2060 idev->mc_ifc_count = pmc->mca_crcount;
2061 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2062 psf->sf_crcount = 0;
2063 mld_ifc_event(idev);
2064 } else if (sf_setstate(pmc))
2065 mld_ifc_event(idev);
2066 spin_unlock_bh(&pmc->mca_lock);
2067 read_unlock_bh(&idev->lock);
2071 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2073 struct ip6_sf_list *psf, *nextpsf;
2075 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
2076 nextpsf = psf->sf_next;
2079 pmc->mca_tomb = NULL;
2080 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
2081 nextpsf = psf->sf_next;
2084 pmc->mca_sources = NULL;
2085 pmc->mca_sfmode = MCAST_EXCLUDE;
2086 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
2087 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2091 static void igmp6_join_group(struct ifmcaddr6 *ma)
2093 unsigned long delay;
2095 if (ma->mca_flags & MAF_NOREPORT)
2098 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2100 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
2102 spin_lock_bh(&ma->mca_lock);
2103 if (del_timer(&ma->mca_timer)) {
2104 atomic_dec(&ma->mca_refcnt);
2105 delay = ma->mca_timer.expires - jiffies;
2108 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2109 atomic_inc(&ma->mca_refcnt);
2110 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2111 spin_unlock_bh(&ma->mca_lock);
2114 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2115 struct inet6_dev *idev)
2119 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2120 * so no other readers or writers of iml or its sflist
2123 /* any-source empty exclude case */
2124 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2126 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2127 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2128 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2133 static void igmp6_leave_group(struct ifmcaddr6 *ma)
2135 if (MLD_V1_SEEN(ma->idev)) {
2136 if (ma->mca_flags & MAF_LAST_REPORTER)
2137 igmp6_send(&ma->mca_addr, ma->idev->dev,
2138 ICMPV6_MGM_REDUCTION);
2140 mld_add_delrec(ma->idev, ma);
2141 mld_ifc_event(ma->idev);
2145 static void mld_gq_timer_expire(unsigned long data)
2147 struct inet6_dev *idev = (struct inet6_dev *)data;
2149 idev->mc_gq_running = 0;
2150 mld_send_report(idev, NULL);
2151 __in6_dev_put(idev);
2154 static void mld_ifc_timer_expire(unsigned long data)
2156 struct inet6_dev *idev = (struct inet6_dev *)data;
2159 if (idev->mc_ifc_count) {
2160 idev->mc_ifc_count--;
2161 if (idev->mc_ifc_count)
2162 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2164 __in6_dev_put(idev);
2167 static void mld_ifc_event(struct inet6_dev *idev)
2169 if (MLD_V1_SEEN(idev))
2171 idev->mc_ifc_count = idev->mc_qrv;
2172 mld_ifc_start_timer(idev, 1);
2176 static void igmp6_timer_handler(unsigned long data)
2178 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2180 if (MLD_V1_SEEN(ma->idev))
2181 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2183 mld_send_report(ma->idev, ma);
2185 spin_lock(&ma->mca_lock);
2186 ma->mca_flags |= MAF_LAST_REPORTER;
2187 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2188 spin_unlock(&ma->mca_lock);
2192 /* Device changing type */
2194 void ipv6_mc_unmap(struct inet6_dev *idev)
2196 struct ifmcaddr6 *i;
2198 /* Install multicast list, except for all-nodes (already installed) */
2200 read_lock_bh(&idev->lock);
2201 for (i = idev->mc_list; i; i = i->next)
2202 igmp6_group_dropped(i);
2203 read_unlock_bh(&idev->lock);
2206 void ipv6_mc_remap(struct inet6_dev *idev)
2211 /* Device going down */
2213 void ipv6_mc_down(struct inet6_dev *idev)
2215 struct ifmcaddr6 *i;
2217 /* Withdraw multicast list */
2219 read_lock_bh(&idev->lock);
2220 idev->mc_ifc_count = 0;
2221 if (del_timer(&idev->mc_ifc_timer))
2222 __in6_dev_put(idev);
2223 idev->mc_gq_running = 0;
2224 if (del_timer(&idev->mc_gq_timer))
2225 __in6_dev_put(idev);
2227 for (i = idev->mc_list; i; i=i->next)
2228 igmp6_group_dropped(i);
2229 read_unlock_bh(&idev->lock);
2231 mld_clear_delrec(idev);
2235 /* Device going up */
2237 void ipv6_mc_up(struct inet6_dev *idev)
2239 struct ifmcaddr6 *i;
2241 /* Install multicast list, except for all-nodes (already installed) */
2243 read_lock_bh(&idev->lock);
2244 for (i = idev->mc_list; i; i=i->next)
2245 igmp6_group_added(i);
2246 read_unlock_bh(&idev->lock);
2249 /* IPv6 device initialization. */
2251 void ipv6_mc_init_dev(struct inet6_dev *idev)
2253 write_lock_bh(&idev->lock);
2254 spin_lock_init(&idev->mc_lock);
2255 idev->mc_gq_running = 0;
2256 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2257 (unsigned long)idev);
2258 idev->mc_tomb = NULL;
2259 idev->mc_ifc_count = 0;
2260 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2261 (unsigned long)idev);
2262 idev->mc_qrv = MLD_QRV_DEFAULT;
2263 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2264 idev->mc_v1_seen = 0;
2265 write_unlock_bh(&idev->lock);
2269 * Device is about to be destroyed: clean up.
2272 void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2274 struct ifmcaddr6 *i;
2276 /* Deactivate timers */
2279 /* Delete all-nodes address. */
2280 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2281 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2284 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes);
2286 if (idev->cnf.forwarding)
2287 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters);
2289 write_lock_bh(&idev->lock);
2290 while ((i = idev->mc_list) != NULL) {
2291 idev->mc_list = i->next;
2292 write_unlock_bh(&idev->lock);
2294 igmp6_group_dropped(i);
2297 write_lock_bh(&idev->lock);
2299 write_unlock_bh(&idev->lock);
2302 #ifdef CONFIG_PROC_FS
2303 struct igmp6_mc_iter_state {
2304 struct seq_net_private p;
2305 struct net_device *dev;
2306 struct inet6_dev *idev;
2309 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2311 static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2313 struct ifmcaddr6 *im = NULL;
2314 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2315 struct net *net = seq_file_net(seq);
2318 for_each_netdev_rcu(net, state->dev) {
2319 struct inet6_dev *idev;
2320 idev = __in6_dev_get(state->dev);
2323 read_lock_bh(&idev->lock);
2329 read_unlock_bh(&idev->lock);
2334 static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2336 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2340 if (likely(state->idev != NULL))
2341 read_unlock_bh(&state->idev->lock);
2343 state->dev = next_net_device_rcu(state->dev);
2348 state->idev = __in6_dev_get(state->dev);
2351 read_lock_bh(&state->idev->lock);
2352 im = state->idev->mc_list;
2357 static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2359 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2361 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2363 return pos ? NULL : im;
2366 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
2370 return igmp6_mc_get_idx(seq, *pos);
2373 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2375 struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v);
2381 static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
2384 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2386 if (likely(state->idev != NULL)) {
2387 read_unlock_bh(&state->idev->lock);
2394 static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2396 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2397 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2400 "%-4d %-15s %pi6 %5d %08X %ld\n",
2401 state->dev->ifindex, state->dev->name,
2403 im->mca_users, im->mca_flags,
2404 (im->mca_flags&MAF_TIMER_RUNNING) ?
2405 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2409 static const struct seq_operations igmp6_mc_seq_ops = {
2410 .start = igmp6_mc_seq_start,
2411 .next = igmp6_mc_seq_next,
2412 .stop = igmp6_mc_seq_stop,
2413 .show = igmp6_mc_seq_show,
2416 static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2418 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2419 sizeof(struct igmp6_mc_iter_state));
2422 static const struct file_operations igmp6_mc_seq_fops = {
2423 .owner = THIS_MODULE,
2424 .open = igmp6_mc_seq_open,
2426 .llseek = seq_lseek,
2427 .release = seq_release_net,
2430 struct igmp6_mcf_iter_state {
2431 struct seq_net_private p;
2432 struct net_device *dev;
2433 struct inet6_dev *idev;
2434 struct ifmcaddr6 *im;
2437 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2439 static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2441 struct ip6_sf_list *psf = NULL;
2442 struct ifmcaddr6 *im = NULL;
2443 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2444 struct net *net = seq_file_net(seq);
2448 for_each_netdev_rcu(net, state->dev) {
2449 struct inet6_dev *idev;
2450 idev = __in6_dev_get(state->dev);
2451 if (unlikely(idev == NULL))
2453 read_lock_bh(&idev->lock);
2455 if (likely(im != NULL)) {
2456 spin_lock_bh(&im->mca_lock);
2457 psf = im->mca_sources;
2458 if (likely(psf != NULL)) {
2463 spin_unlock_bh(&im->mca_lock);
2465 read_unlock_bh(&idev->lock);
2470 static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2472 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2476 spin_unlock_bh(&state->im->mca_lock);
2477 state->im = state->im->next;
2478 while (!state->im) {
2479 if (likely(state->idev != NULL))
2480 read_unlock_bh(&state->idev->lock);
2482 state->dev = next_net_device_rcu(state->dev);
2487 state->idev = __in6_dev_get(state->dev);
2490 read_lock_bh(&state->idev->lock);
2491 state->im = state->idev->mc_list;
2495 spin_lock_bh(&state->im->mca_lock);
2496 psf = state->im->mca_sources;
2502 static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2504 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2506 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2508 return pos ? NULL : psf;
2511 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
2515 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2518 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2520 struct ip6_sf_list *psf;
2521 if (v == SEQ_START_TOKEN)
2522 psf = igmp6_mcf_get_first(seq);
2524 psf = igmp6_mcf_get_next(seq, v);
2529 static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
2532 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2533 if (likely(state->im != NULL)) {
2534 spin_unlock_bh(&state->im->mca_lock);
2537 if (likely(state->idev != NULL)) {
2538 read_unlock_bh(&state->idev->lock);
2545 static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2547 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2548 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2550 if (v == SEQ_START_TOKEN) {
2553 "%32s %32s %6s %6s\n", "Idx",
2554 "Device", "Multicast Address",
2555 "Source Address", "INC", "EXC");
2558 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
2559 state->dev->ifindex, state->dev->name,
2560 &state->im->mca_addr,
2562 psf->sf_count[MCAST_INCLUDE],
2563 psf->sf_count[MCAST_EXCLUDE]);
2568 static const struct seq_operations igmp6_mcf_seq_ops = {
2569 .start = igmp6_mcf_seq_start,
2570 .next = igmp6_mcf_seq_next,
2571 .stop = igmp6_mcf_seq_stop,
2572 .show = igmp6_mcf_seq_show,
2575 static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2577 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2578 sizeof(struct igmp6_mcf_iter_state));
2581 static const struct file_operations igmp6_mcf_seq_fops = {
2582 .owner = THIS_MODULE,
2583 .open = igmp6_mcf_seq_open,
2585 .llseek = seq_lseek,
2586 .release = seq_release_net,
2589 static int __net_init igmp6_proc_init(struct net *net)
2594 if (!proc_net_fops_create(net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops))
2596 if (!proc_net_fops_create(net, "mcfilter6", S_IRUGO,
2597 &igmp6_mcf_seq_fops))
2598 goto out_proc_net_igmp6;
2605 proc_net_remove(net, "igmp6");
2609 static void __net_exit igmp6_proc_exit(struct net *net)
2611 proc_net_remove(net, "mcfilter6");
2612 proc_net_remove(net, "igmp6");
2615 static inline int igmp6_proc_init(struct net *net)
2619 static inline void igmp6_proc_exit(struct net *net)
2624 static int __net_init igmp6_net_init(struct net *net)
2628 err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
2629 SOCK_RAW, IPPROTO_ICMPV6, net);
2632 "Failed to initialize the IGMP6 control socket (err %d).\n",
2637 inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
2639 err = igmp6_proc_init(net);
2641 goto out_sock_create;
2646 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2650 static void __net_exit igmp6_net_exit(struct net *net)
2652 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2653 igmp6_proc_exit(net);
2656 static struct pernet_operations igmp6_net_ops = {
2657 .init = igmp6_net_init,
2658 .exit = igmp6_net_exit,
2661 int __init igmp6_init(void)
2663 return register_pernet_subsys(&igmp6_net_ops);
2666 void igmp6_cleanup(void)
2668 unregister_pernet_subsys(&igmp6_net_ops);