2 * Multicast support for IPv6
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * $Id: mcast.c,v 1.40 2002/02/08 03:57:19 davem Exp $
10 * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
20 * yoshfuji : fix format of router-alert option
21 * YOSHIFUJI Hideaki @USAGI:
22 * Fixed source address for MLD message based on
23 * <draft-ietf-magma-mld-source-05.txt>.
24 * YOSHIFUJI Hideaki @USAGI:
25 * - Ignore Queries for invalid addresses.
26 * - MLD for link-local addresses.
27 * David L Stevens <dlstevens@us.ibm.com>:
31 #include <linux/module.h>
32 #include <linux/errno.h>
33 #include <linux/types.h>
34 #include <linux/string.h>
35 #include <linux/socket.h>
36 #include <linux/sockios.h>
37 #include <linux/jiffies.h>
38 #include <linux/times.h>
39 #include <linux/net.h>
41 #include <linux/in6.h>
42 #include <linux/netdevice.h>
43 #include <linux/if_arp.h>
44 #include <linux/route.h>
45 #include <linux/init.h>
46 #include <linux/proc_fs.h>
47 #include <linux/seq_file.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>
63 #include <net/ip6_checksum.h>
65 /* Set to 3 to get tracing... */
69 #define MDBG(x) printk x
75 * These header formats should be in a separate include file, but icmpv6.h
76 * doesn't have in6_addr defined in all cases, there is no __u128, and no
77 * other files reference these.
82 /* Multicast Listener Discovery version 2 headers */
88 struct in6_addr grec_mca;
89 struct in6_addr grec_src[0];
98 struct mld2_grec grec[0];
108 #if defined(__LITTLE_ENDIAN_BITFIELD)
112 #elif defined(__BIG_ENDIAN_BITFIELD)
117 #error "Please fix <asm/byteorder.h>"
121 struct in6_addr srcs[0];
124 static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
126 /* Big mc list lock for all the sockets */
127 static DEFINE_RWLOCK(ipv6_sk_mc_lock);
129 int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
131 static void igmp6_join_group(struct ifmcaddr6 *ma);
132 static void igmp6_leave_group(struct ifmcaddr6 *ma);
133 static void igmp6_timer_handler(unsigned long data);
135 static void mld_gq_timer_expire(unsigned long data);
136 static void mld_ifc_timer_expire(unsigned long data);
137 static void mld_ifc_event(struct inet6_dev *idev);
138 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
139 static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr);
140 static void mld_clear_delrec(struct inet6_dev *idev);
141 static int sf_setstate(struct ifmcaddr6 *pmc);
142 static void sf_markstate(struct ifmcaddr6 *pmc);
143 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
144 static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
145 int sfmode, int sfcount, struct in6_addr *psfsrc,
147 static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
148 int sfmode, int sfcount, struct in6_addr *psfsrc,
150 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
151 struct inet6_dev *idev);
154 #define IGMP6_UNSOLICITED_IVAL (10*HZ)
155 #define MLD_QRV_DEFAULT 2
157 #define MLD_V1_SEEN(idev) (ipv6_devconf.force_mld_version == 1 || \
158 (idev)->cnf.force_mld_version == 1 || \
159 ((idev)->mc_v1_seen && \
160 time_before(jiffies, (idev)->mc_v1_seen)))
162 #define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
163 #define MLDV2_EXP(thresh, nbmant, nbexp, value) \
164 ((value) < (thresh) ? (value) : \
165 ((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \
166 (MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
168 #define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value)
169 #define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
171 #define IPV6_MLD_MAX_MSF 64
173 int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
176 * socket join on multicast group
179 int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr)
181 struct net_device *dev = NULL;
182 struct ipv6_mc_socklist *mc_lst;
183 struct ipv6_pinfo *np = inet6_sk(sk);
184 struct net *net = sock_net(sk);
187 if (!ipv6_addr_is_multicast(addr))
190 read_lock_bh(&ipv6_sk_mc_lock);
191 for (mc_lst=np->ipv6_mc_list; mc_lst; mc_lst=mc_lst->next) {
192 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
193 ipv6_addr_equal(&mc_lst->addr, addr)) {
194 read_unlock_bh(&ipv6_sk_mc_lock);
198 read_unlock_bh(&ipv6_sk_mc_lock);
200 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
206 ipv6_addr_copy(&mc_lst->addr, addr);
210 rt = rt6_lookup(net, addr, NULL, 0, 0);
214 dst_release(&rt->u.dst);
217 dev = dev_get_by_index(net, ifindex);
220 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
224 mc_lst->ifindex = dev->ifindex;
225 mc_lst->sfmode = MCAST_EXCLUDE;
226 rwlock_init(&mc_lst->sflock);
227 mc_lst->sflist = NULL;
230 * now add/increase the group membership on the device
233 err = ipv6_dev_mc_inc(dev, addr);
236 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
241 write_lock_bh(&ipv6_sk_mc_lock);
242 mc_lst->next = np->ipv6_mc_list;
243 np->ipv6_mc_list = mc_lst;
244 write_unlock_bh(&ipv6_sk_mc_lock);
252 * socket leave on multicast group
254 int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
256 struct ipv6_pinfo *np = inet6_sk(sk);
257 struct ipv6_mc_socklist *mc_lst, **lnk;
258 struct net *net = sock_net(sk);
260 write_lock_bh(&ipv6_sk_mc_lock);
261 for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) {
262 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
263 ipv6_addr_equal(&mc_lst->addr, addr)) {
264 struct net_device *dev;
267 write_unlock_bh(&ipv6_sk_mc_lock);
269 dev = dev_get_by_index(net, mc_lst->ifindex);
271 struct inet6_dev *idev = in6_dev_get(dev);
273 (void) ip6_mc_leave_src(sk, mc_lst, idev);
275 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
280 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
281 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
285 write_unlock_bh(&ipv6_sk_mc_lock);
287 return -EADDRNOTAVAIL;
290 static struct inet6_dev *ip6_mc_find_dev(struct net *net,
291 struct in6_addr *group,
294 struct net_device *dev = NULL;
295 struct inet6_dev *idev = NULL;
300 rt = rt6_lookup(net, group, NULL, 0, 0);
304 dst_release(&rt->u.dst);
307 dev = dev_get_by_index(net, ifindex);
311 idev = in6_dev_get(dev);
316 read_lock_bh(&idev->lock);
318 read_unlock_bh(&idev->lock);
326 void ipv6_sock_mc_close(struct sock *sk)
328 struct ipv6_pinfo *np = inet6_sk(sk);
329 struct ipv6_mc_socklist *mc_lst;
330 struct net *net = sock_net(sk);
332 write_lock_bh(&ipv6_sk_mc_lock);
333 while ((mc_lst = np->ipv6_mc_list) != NULL) {
334 struct net_device *dev;
336 np->ipv6_mc_list = mc_lst->next;
337 write_unlock_bh(&ipv6_sk_mc_lock);
339 dev = dev_get_by_index(net, mc_lst->ifindex);
341 struct inet6_dev *idev = in6_dev_get(dev);
343 (void) ip6_mc_leave_src(sk, mc_lst, idev);
345 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
350 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
352 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
354 write_lock_bh(&ipv6_sk_mc_lock);
356 write_unlock_bh(&ipv6_sk_mc_lock);
359 int ip6_mc_source(int add, int omode, struct sock *sk,
360 struct group_source_req *pgsr)
362 struct in6_addr *source, *group;
363 struct ipv6_mc_socklist *pmc;
364 struct net_device *dev;
365 struct inet6_dev *idev;
366 struct ipv6_pinfo *inet6 = inet6_sk(sk);
367 struct ip6_sf_socklist *psl;
368 struct net *net = sock_net(sk);
374 if (pgsr->gsr_group.ss_family != AF_INET6 ||
375 pgsr->gsr_source.ss_family != AF_INET6)
378 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
379 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
381 if (!ipv6_addr_is_multicast(group))
384 idev = ip6_mc_find_dev(net, group, pgsr->gsr_interface);
389 err = -EADDRNOTAVAIL;
391 read_lock_bh(&ipv6_sk_mc_lock);
392 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
393 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
395 if (ipv6_addr_equal(&pmc->addr, group))
398 if (!pmc) { /* must have a prior join */
402 /* if a source filter was set, must be the same mode as before */
404 if (pmc->sfmode != omode) {
408 } else if (pmc->sfmode != omode) {
409 /* allow mode switches for empty-set filters */
410 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
411 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
415 write_lock_bh(&pmc->sflock);
421 goto done; /* err = -EADDRNOTAVAIL */
423 for (i=0; i<psl->sl_count; i++) {
424 rv = memcmp(&psl->sl_addr[i], source,
425 sizeof(struct in6_addr));
429 if (rv) /* source not found */
430 goto done; /* err = -EADDRNOTAVAIL */
432 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
433 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
438 /* update the interface filter */
439 ip6_mc_del_src(idev, group, omode, 1, source, 1);
441 for (j=i+1; j<psl->sl_count; j++)
442 psl->sl_addr[j-1] = psl->sl_addr[j];
447 /* else, add a new source to the filter */
449 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
453 if (!psl || psl->sl_count == psl->sl_max) {
454 struct ip6_sf_socklist *newpsl;
455 int count = IP6_SFBLOCK;
458 count += psl->sl_max;
459 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
464 newpsl->sl_max = count;
465 newpsl->sl_count = count - IP6_SFBLOCK;
467 for (i=0; i<psl->sl_count; i++)
468 newpsl->sl_addr[i] = psl->sl_addr[i];
469 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
471 pmc->sflist = psl = newpsl;
473 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
474 for (i=0; i<psl->sl_count; i++) {
475 rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr));
479 if (rv == 0) /* address already there is an error */
481 for (j=psl->sl_count-1; j>=i; j--)
482 psl->sl_addr[j+1] = psl->sl_addr[j];
483 psl->sl_addr[i] = *source;
486 /* update the interface list */
487 ip6_mc_add_src(idev, group, omode, 1, source, 1);
490 write_unlock_bh(&pmc->sflock);
491 read_unlock_bh(&ipv6_sk_mc_lock);
492 read_unlock_bh(&idev->lock);
496 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
500 int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
502 struct in6_addr *group;
503 struct ipv6_mc_socklist *pmc;
504 struct net_device *dev;
505 struct inet6_dev *idev;
506 struct ipv6_pinfo *inet6 = inet6_sk(sk);
507 struct ip6_sf_socklist *newpsl, *psl;
508 struct net *net = sock_net(sk);
512 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
514 if (!ipv6_addr_is_multicast(group))
516 if (gsf->gf_fmode != MCAST_INCLUDE &&
517 gsf->gf_fmode != MCAST_EXCLUDE)
520 idev = ip6_mc_find_dev(net, group, gsf->gf_interface);
527 read_lock_bh(&ipv6_sk_mc_lock);
529 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
534 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
535 if (pmc->ifindex != gsf->gf_interface)
537 if (ipv6_addr_equal(&pmc->addr, group))
540 if (!pmc) { /* must have a prior join */
544 if (gsf->gf_numsrc) {
545 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
551 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
552 for (i=0; i<newpsl->sl_count; ++i) {
553 struct sockaddr_in6 *psin6;
555 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
556 newpsl->sl_addr[i] = psin6->sin6_addr;
558 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
559 newpsl->sl_count, newpsl->sl_addr, 0);
561 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
566 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
569 write_lock_bh(&pmc->sflock);
572 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
573 psl->sl_count, psl->sl_addr, 0);
574 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
576 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
577 pmc->sflist = newpsl;
578 pmc->sfmode = gsf->gf_fmode;
579 write_unlock_bh(&pmc->sflock);
582 read_unlock_bh(&ipv6_sk_mc_lock);
583 read_unlock_bh(&idev->lock);
587 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
591 int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
592 struct group_filter __user *optval, int __user *optlen)
594 int err, i, count, copycount;
595 struct in6_addr *group;
596 struct ipv6_mc_socklist *pmc;
597 struct inet6_dev *idev;
598 struct net_device *dev;
599 struct ipv6_pinfo *inet6 = inet6_sk(sk);
600 struct ip6_sf_socklist *psl;
601 struct net *net = sock_net(sk);
603 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
605 if (!ipv6_addr_is_multicast(group))
608 idev = ip6_mc_find_dev(net, group, gsf->gf_interface);
615 err = -EADDRNOTAVAIL;
617 * changes to the ipv6_mc_list require the socket lock and
618 * a read lock on ip6_sk_mc_lock. We have the socket lock,
619 * so reading the list is safe.
622 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
623 if (pmc->ifindex != gsf->gf_interface)
625 if (ipv6_addr_equal(group, &pmc->addr))
628 if (!pmc) /* must have a prior join */
630 gsf->gf_fmode = pmc->sfmode;
632 count = psl ? psl->sl_count : 0;
633 read_unlock_bh(&idev->lock);
637 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
638 gsf->gf_numsrc = count;
639 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
640 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
643 /* changes to psl require the socket lock, a read lock on
644 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
645 * have the socket lock, so reading here is safe.
647 for (i=0; i<copycount; i++) {
648 struct sockaddr_in6 *psin6;
649 struct sockaddr_storage ss;
651 psin6 = (struct sockaddr_in6 *)&ss;
652 memset(&ss, 0, sizeof(ss));
653 psin6->sin6_family = AF_INET6;
654 psin6->sin6_addr = psl->sl_addr[i];
655 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
660 read_unlock_bh(&idev->lock);
666 int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
667 struct in6_addr *src_addr)
669 struct ipv6_pinfo *np = inet6_sk(sk);
670 struct ipv6_mc_socklist *mc;
671 struct ip6_sf_socklist *psl;
674 read_lock(&ipv6_sk_mc_lock);
675 for (mc = np->ipv6_mc_list; mc; mc = mc->next) {
676 if (ipv6_addr_equal(&mc->addr, mc_addr))
680 read_unlock(&ipv6_sk_mc_lock);
683 read_lock(&mc->sflock);
686 rv = mc->sfmode == MCAST_EXCLUDE;
690 for (i=0; i<psl->sl_count; i++) {
691 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
694 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
696 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
699 read_unlock(&mc->sflock);
700 read_unlock(&ipv6_sk_mc_lock);
705 static void ma_put(struct ifmcaddr6 *mc)
707 if (atomic_dec_and_test(&mc->mca_refcnt)) {
708 in6_dev_put(mc->idev);
713 static void igmp6_group_added(struct ifmcaddr6 *mc)
715 struct net_device *dev = mc->idev->dev;
716 char buf[MAX_ADDR_LEN];
718 spin_lock_bh(&mc->mca_lock);
719 if (!(mc->mca_flags&MAF_LOADED)) {
720 mc->mca_flags |= MAF_LOADED;
721 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
722 dev_mc_add(dev, buf, dev->addr_len, 0);
724 spin_unlock_bh(&mc->mca_lock);
726 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
729 if (MLD_V1_SEEN(mc->idev)) {
730 igmp6_join_group(mc);
735 mc->mca_crcount = mc->idev->mc_qrv;
736 mld_ifc_event(mc->idev);
739 static void igmp6_group_dropped(struct ifmcaddr6 *mc)
741 struct net_device *dev = mc->idev->dev;
742 char buf[MAX_ADDR_LEN];
744 spin_lock_bh(&mc->mca_lock);
745 if (mc->mca_flags&MAF_LOADED) {
746 mc->mca_flags &= ~MAF_LOADED;
747 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
748 dev_mc_delete(dev, buf, dev->addr_len, 0);
751 if (mc->mca_flags & MAF_NOREPORT)
753 spin_unlock_bh(&mc->mca_lock);
756 igmp6_leave_group(mc);
758 spin_lock_bh(&mc->mca_lock);
759 if (del_timer(&mc->mca_timer))
760 atomic_dec(&mc->mca_refcnt);
762 ip6_mc_clear_src(mc);
763 spin_unlock_bh(&mc->mca_lock);
767 * deleted ifmcaddr6 manipulation
769 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
771 struct ifmcaddr6 *pmc;
773 /* this is an "ifmcaddr6" for convenience; only the fields below
774 * are actually used. In particular, the refcnt and users are not
775 * used for management of the delete list. Using the same structure
776 * for deleted items allows change reports to use common code with
777 * non-deleted or query-response MCA's.
779 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
783 spin_lock_bh(&im->mca_lock);
784 spin_lock_init(&pmc->mca_lock);
785 pmc->idev = im->idev;
787 pmc->mca_addr = im->mca_addr;
788 pmc->mca_crcount = idev->mc_qrv;
789 pmc->mca_sfmode = im->mca_sfmode;
790 if (pmc->mca_sfmode == MCAST_INCLUDE) {
791 struct ip6_sf_list *psf;
793 pmc->mca_tomb = im->mca_tomb;
794 pmc->mca_sources = im->mca_sources;
795 im->mca_tomb = im->mca_sources = NULL;
796 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
797 psf->sf_crcount = pmc->mca_crcount;
799 spin_unlock_bh(&im->mca_lock);
801 write_lock_bh(&idev->mc_lock);
802 pmc->next = idev->mc_tomb;
804 write_unlock_bh(&idev->mc_lock);
807 static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
809 struct ifmcaddr6 *pmc, *pmc_prev;
810 struct ip6_sf_list *psf, *psf_next;
812 write_lock_bh(&idev->mc_lock);
814 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
815 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
821 pmc_prev->next = pmc->next;
823 idev->mc_tomb = pmc->next;
825 write_unlock_bh(&idev->mc_lock);
827 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
828 psf_next = psf->sf_next;
831 in6_dev_put(pmc->idev);
836 static void mld_clear_delrec(struct inet6_dev *idev)
838 struct ifmcaddr6 *pmc, *nextpmc;
840 write_lock_bh(&idev->mc_lock);
842 idev->mc_tomb = NULL;
843 write_unlock_bh(&idev->mc_lock);
845 for (; pmc; pmc = nextpmc) {
847 ip6_mc_clear_src(pmc);
848 in6_dev_put(pmc->idev);
852 /* clear dead sources, too */
853 read_lock_bh(&idev->lock);
854 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
855 struct ip6_sf_list *psf, *psf_next;
857 spin_lock_bh(&pmc->mca_lock);
859 pmc->mca_tomb = NULL;
860 spin_unlock_bh(&pmc->mca_lock);
861 for (; psf; psf=psf_next) {
862 psf_next = psf->sf_next;
866 read_unlock_bh(&idev->lock);
871 * device multicast group inc (add if not found)
873 int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr)
875 struct ifmcaddr6 *mc;
876 struct inet6_dev *idev;
878 idev = in6_dev_get(dev);
883 write_lock_bh(&idev->lock);
885 write_unlock_bh(&idev->lock);
890 for (mc = idev->mc_list; mc; mc = mc->next) {
891 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
893 write_unlock_bh(&idev->lock);
894 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
902 * not found: create a new one.
905 mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
908 write_unlock_bh(&idev->lock);
913 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
915 ipv6_addr_copy(&mc->mca_addr, addr);
918 /* mca_stamp should be updated upon changes */
919 mc->mca_cstamp = mc->mca_tstamp = jiffies;
920 atomic_set(&mc->mca_refcnt, 2);
921 spin_lock_init(&mc->mca_lock);
923 /* initial mode is (EX, empty) */
924 mc->mca_sfmode = MCAST_EXCLUDE;
925 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
927 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
928 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
929 mc->mca_flags |= MAF_NOREPORT;
931 mc->next = idev->mc_list;
933 write_unlock_bh(&idev->lock);
935 mld_del_delrec(idev, &mc->mca_addr);
936 igmp6_group_added(mc);
942 * device multicast group del
944 int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr)
946 struct ifmcaddr6 *ma, **map;
948 write_lock_bh(&idev->lock);
949 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
950 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
951 if (--ma->mca_users == 0) {
953 write_unlock_bh(&idev->lock);
955 igmp6_group_dropped(ma);
960 write_unlock_bh(&idev->lock);
964 write_unlock_bh(&idev->lock);
969 int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr)
971 struct inet6_dev *idev = in6_dev_get(dev);
977 err = __ipv6_dev_mc_dec(idev, addr);
985 * identify MLD packets for MLD filter exceptions
987 int ipv6_is_mld(struct sk_buff *skb, int nexthdr)
989 struct icmp6hdr *pic;
991 if (nexthdr != IPPROTO_ICMPV6)
994 if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
997 pic = icmp6_hdr(skb);
999 switch (pic->icmp6_type) {
1000 case ICMPV6_MGM_QUERY:
1001 case ICMPV6_MGM_REPORT:
1002 case ICMPV6_MGM_REDUCTION:
1003 case ICMPV6_MLD2_REPORT:
1012 * check if the interface/address pair is valid
1014 int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
1015 struct in6_addr *src_addr)
1017 struct inet6_dev *idev;
1018 struct ifmcaddr6 *mc;
1021 idev = in6_dev_get(dev);
1023 read_lock_bh(&idev->lock);
1024 for (mc = idev->mc_list; mc; mc=mc->next) {
1025 if (ipv6_addr_equal(&mc->mca_addr, group))
1029 if (src_addr && !ipv6_addr_any(src_addr)) {
1030 struct ip6_sf_list *psf;
1032 spin_lock_bh(&mc->mca_lock);
1033 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
1034 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
1038 rv = psf->sf_count[MCAST_INCLUDE] ||
1039 psf->sf_count[MCAST_EXCLUDE] !=
1040 mc->mca_sfcount[MCAST_EXCLUDE];
1042 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
1043 spin_unlock_bh(&mc->mca_lock);
1045 rv = 1; /* don't filter unspecified source */
1047 read_unlock_bh(&idev->lock);
1053 static void mld_gq_start_timer(struct inet6_dev *idev)
1055 int tv = net_random() % idev->mc_maxdelay;
1057 idev->mc_gq_running = 1;
1058 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1062 static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
1064 int tv = net_random() % delay;
1066 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1071 * IGMP handling (alias multicast ICMPv6 messages)
1074 static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1076 unsigned long delay = resptime;
1078 /* Do not start timer for these addresses */
1079 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1080 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1083 if (del_timer(&ma->mca_timer)) {
1084 atomic_dec(&ma->mca_refcnt);
1085 delay = ma->mca_timer.expires - jiffies;
1088 if (delay >= resptime) {
1090 delay = net_random() % resptime;
1094 ma->mca_timer.expires = jiffies + delay;
1095 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1096 atomic_inc(&ma->mca_refcnt);
1097 ma->mca_flags |= MAF_TIMER_RUNNING;
1100 /* mark EXCLUDE-mode sources */
1101 static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
1102 struct in6_addr *srcs)
1104 struct ip6_sf_list *psf;
1108 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1109 if (scount == nsrcs)
1111 for (i=0; i<nsrcs; i++) {
1112 /* skip inactive filters */
1113 if (pmc->mca_sfcount[MCAST_INCLUDE] ||
1114 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1115 psf->sf_count[MCAST_EXCLUDE])
1117 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1123 pmc->mca_flags &= ~MAF_GSQUERY;
1124 if (scount == nsrcs) /* all sources excluded */
1129 static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1130 struct in6_addr *srcs)
1132 struct ip6_sf_list *psf;
1135 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1136 return mld_xmarksources(pmc, nsrcs, srcs);
1138 /* mark INCLUDE-mode sources */
1141 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1142 if (scount == nsrcs)
1144 for (i=0; i<nsrcs; i++) {
1145 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1153 pmc->mca_flags &= ~MAF_GSQUERY;
1156 pmc->mca_flags |= MAF_GSQUERY;
1160 int igmp6_event_query(struct sk_buff *skb)
1162 struct mld2_query *mlh2 = NULL;
1163 struct ifmcaddr6 *ma;
1164 struct in6_addr *group;
1165 unsigned long max_delay;
1166 struct inet6_dev *idev;
1167 struct icmp6hdr *hdr;
1172 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1175 /* compute payload length excluding extension headers */
1176 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
1177 len -= skb_network_header_len(skb);
1179 /* Drop queries with not link local source */
1180 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
1183 idev = in6_dev_get(skb->dev);
1188 hdr = icmp6_hdr(skb);
1189 group = (struct in6_addr *) (hdr + 1);
1190 group_type = ipv6_addr_type(group);
1192 if (group_type != IPV6_ADDR_ANY &&
1193 !(group_type&IPV6_ADDR_MULTICAST)) {
1200 /* MLDv1 router present */
1202 /* Translate milliseconds to jiffies */
1203 max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000;
1205 switchback = (idev->mc_qrv + 1) * max_delay;
1206 idev->mc_v1_seen = jiffies + switchback;
1208 /* cancel the interface change timer */
1209 idev->mc_ifc_count = 0;
1210 if (del_timer(&idev->mc_ifc_timer))
1211 __in6_dev_put(idev);
1212 /* clear deleted report items */
1213 mld_clear_delrec(idev);
1214 } else if (len >= 28) {
1215 int srcs_offset = sizeof(struct mld2_query) -
1216 sizeof(struct icmp6hdr);
1217 if (!pskb_may_pull(skb, srcs_offset)) {
1221 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1222 max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
1225 idev->mc_maxdelay = max_delay;
1227 idev->mc_qrv = mlh2->qrv;
1228 if (group_type == IPV6_ADDR_ANY) { /* general query */
1231 return -EINVAL; /* no sources allowed */
1233 mld_gq_start_timer(idev);
1237 /* mark sources to include, if group & source-specific */
1238 if (mlh2->nsrcs != 0) {
1239 if (!pskb_may_pull(skb, srcs_offset +
1240 ntohs(mlh2->nsrcs) * sizeof(struct in6_addr))) {
1244 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1252 read_lock_bh(&idev->lock);
1253 if (group_type == IPV6_ADDR_ANY) {
1254 for (ma = idev->mc_list; ma; ma=ma->next) {
1255 spin_lock_bh(&ma->mca_lock);
1256 igmp6_group_queried(ma, max_delay);
1257 spin_unlock_bh(&ma->mca_lock);
1260 for (ma = idev->mc_list; ma; ma=ma->next) {
1261 if (!ipv6_addr_equal(group, &ma->mca_addr))
1263 spin_lock_bh(&ma->mca_lock);
1264 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1265 /* gsquery <- gsquery && mark */
1267 ma->mca_flags &= ~MAF_GSQUERY;
1269 /* gsquery <- mark */
1271 ma->mca_flags |= MAF_GSQUERY;
1273 ma->mca_flags &= ~MAF_GSQUERY;
1275 if (!(ma->mca_flags & MAF_GSQUERY) ||
1276 mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs))
1277 igmp6_group_queried(ma, max_delay);
1278 spin_unlock_bh(&ma->mca_lock);
1282 read_unlock_bh(&idev->lock);
1289 int igmp6_event_report(struct sk_buff *skb)
1291 struct ifmcaddr6 *ma;
1292 struct in6_addr *addrp;
1293 struct inet6_dev *idev;
1294 struct icmp6hdr *hdr;
1297 /* Our own report looped back. Ignore it. */
1298 if (skb->pkt_type == PACKET_LOOPBACK)
1301 /* send our report if the MC router may not have heard this report */
1302 if (skb->pkt_type != PACKET_MULTICAST &&
1303 skb->pkt_type != PACKET_BROADCAST)
1306 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1309 hdr = icmp6_hdr(skb);
1311 /* Drop reports with not link local source */
1312 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
1313 if (addr_type != IPV6_ADDR_ANY &&
1314 !(addr_type&IPV6_ADDR_LINKLOCAL))
1317 addrp = (struct in6_addr *) (hdr + 1);
1319 idev = in6_dev_get(skb->dev);
1324 * Cancel the timer for this group
1327 read_lock_bh(&idev->lock);
1328 for (ma = idev->mc_list; ma; ma=ma->next) {
1329 if (ipv6_addr_equal(&ma->mca_addr, addrp)) {
1330 spin_lock(&ma->mca_lock);
1331 if (del_timer(&ma->mca_timer))
1332 atomic_dec(&ma->mca_refcnt);
1333 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1334 spin_unlock(&ma->mca_lock);
1338 read_unlock_bh(&idev->lock);
1343 static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1344 int gdeleted, int sdeleted)
1347 case MLD2_MODE_IS_INCLUDE:
1348 case MLD2_MODE_IS_EXCLUDE:
1349 if (gdeleted || sdeleted)
1351 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1352 if (pmc->mca_sfmode == MCAST_INCLUDE)
1354 /* don't include if this source is excluded
1357 if (psf->sf_count[MCAST_INCLUDE])
1358 return type == MLD2_MODE_IS_INCLUDE;
1359 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1360 psf->sf_count[MCAST_EXCLUDE];
1363 case MLD2_CHANGE_TO_INCLUDE:
1364 if (gdeleted || sdeleted)
1366 return psf->sf_count[MCAST_INCLUDE] != 0;
1367 case MLD2_CHANGE_TO_EXCLUDE:
1368 if (gdeleted || sdeleted)
1370 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1371 psf->sf_count[MCAST_INCLUDE])
1373 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1374 psf->sf_count[MCAST_EXCLUDE];
1375 case MLD2_ALLOW_NEW_SOURCES:
1376 if (gdeleted || !psf->sf_crcount)
1378 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1379 case MLD2_BLOCK_OLD_SOURCES:
1380 if (pmc->mca_sfmode == MCAST_INCLUDE)
1381 return gdeleted || (psf->sf_crcount && sdeleted);
1382 return psf->sf_crcount && !gdeleted && !sdeleted;
1388 mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1390 struct ip6_sf_list *psf;
1393 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1394 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1401 static struct sk_buff *mld_newpack(struct net_device *dev, int size)
1403 struct net *net = dev_net(dev);
1404 struct sock *sk = net->ipv6.igmp_sk;
1405 struct sk_buff *skb;
1406 struct mld2_report *pmr;
1407 struct in6_addr addr_buf;
1409 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1410 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1413 /* we assume size > sizeof(ra) here */
1414 skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err);
1419 skb_reserve(skb, LL_RESERVED_SPACE(dev));
1421 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1422 /* <draft-ietf-magma-mld-source-05.txt>:
1423 * use unspecified address as the source address
1424 * when a valid link-local address is not available.
1426 memset(&addr_buf, 0, sizeof(addr_buf));
1429 ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0);
1431 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1433 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
1434 skb_put(skb, sizeof(*pmr));
1435 pmr = (struct mld2_report *)skb_transport_header(skb);
1436 pmr->type = ICMPV6_MLD2_REPORT;
1444 static void mld_sendpack(struct sk_buff *skb)
1446 struct ipv6hdr *pip6 = ipv6_hdr(skb);
1447 struct mld2_report *pmr =
1448 (struct mld2_report *)skb_transport_header(skb);
1449 int payload_len, mldlen;
1450 struct inet6_dev *idev = in6_dev_get(skb->dev);
1451 struct net *net = dev_net(skb->dev);
1455 IP6_INC_STATS(idev, IPSTATS_MIB_OUTREQUESTS);
1456 payload_len = (skb->tail - skb->network_header) - sizeof(*pip6);
1457 mldlen = skb->tail - skb->transport_header;
1458 pip6->payload_len = htons(payload_len);
1460 pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1461 IPPROTO_ICMPV6, csum_partial(skb_transport_header(skb),
1464 skb->dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
1471 icmpv6_flow_init(net->ipv6.igmp_sk, &fl, ICMPV6_MLD2_REPORT,
1472 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1475 err = xfrm_lookup(&skb->dst, &fl, NULL, 0);
1479 err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1483 ICMP6MSGOUT_INC_STATS_BH(idev, ICMPV6_MLD2_REPORT);
1484 ICMP6_INC_STATS_BH(idev, ICMP6_MIB_OUTMSGS);
1485 IP6_INC_STATS_BH(idev, IPSTATS_MIB_OUTMCASTPKTS);
1487 IP6_INC_STATS_BH(idev, IPSTATS_MIB_OUTDISCARDS);
1489 if (likely(idev != NULL))
1498 static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1500 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
1503 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1504 int type, struct mld2_grec **ppgr)
1506 struct net_device *dev = pmc->idev->dev;
1507 struct mld2_report *pmr;
1508 struct mld2_grec *pgr;
1511 skb = mld_newpack(dev, dev->mtu);
1514 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1515 pgr->grec_type = type;
1516 pgr->grec_auxwords = 0;
1517 pgr->grec_nsrcs = 0;
1518 pgr->grec_mca = pmc->mca_addr; /* structure copy */
1519 pmr = (struct mld2_report *)skb_transport_header(skb);
1520 pmr->ngrec = htons(ntohs(pmr->ngrec)+1);
1525 #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1526 skb_tailroom(skb)) : 0)
1528 static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1529 int type, int gdeleted, int sdeleted)
1531 struct net_device *dev = pmc->idev->dev;
1532 struct mld2_report *pmr;
1533 struct mld2_grec *pgr = NULL;
1534 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
1535 int scount, stotal, first, isquery, truncate;
1537 if (pmc->mca_flags & MAF_NOREPORT)
1540 isquery = type == MLD2_MODE_IS_INCLUDE ||
1541 type == MLD2_MODE_IS_EXCLUDE;
1542 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1543 type == MLD2_CHANGE_TO_EXCLUDE;
1545 stotal = scount = 0;
1547 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1552 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
1554 /* EX and TO_EX get a fresh packet, if needed */
1556 if (pmr && pmr->ngrec &&
1557 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1560 skb = mld_newpack(dev, dev->mtu);
1565 for (psf=*psf_list; psf; psf=psf_next) {
1566 struct in6_addr *psrc;
1568 psf_next = psf->sf_next;
1570 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1575 /* clear marks on query responses */
1579 if (AVAILABLE(skb) < sizeof(*psrc) +
1580 first*sizeof(struct mld2_grec)) {
1581 if (truncate && !first)
1582 break; /* truncate these */
1584 pgr->grec_nsrcs = htons(scount);
1587 skb = mld_newpack(dev, dev->mtu);
1592 skb = add_grhead(skb, pmc, type, &pgr);
1597 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1598 *psrc = psf->sf_addr;
1600 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1601 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1603 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1605 psf_prev->sf_next = psf->sf_next;
1607 *psf_list = psf->sf_next;
1617 if (type == MLD2_ALLOW_NEW_SOURCES ||
1618 type == MLD2_BLOCK_OLD_SOURCES)
1620 if (pmc->mca_crcount || isquery) {
1621 /* make sure we have room for group header */
1622 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1624 skb = NULL; /* add_grhead will get a new one */
1626 skb = add_grhead(skb, pmc, type, &pgr);
1630 pgr->grec_nsrcs = htons(scount);
1633 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1637 static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1639 struct sk_buff *skb = NULL;
1643 read_lock_bh(&idev->lock);
1644 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1645 if (pmc->mca_flags & MAF_NOREPORT)
1647 spin_lock_bh(&pmc->mca_lock);
1648 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1649 type = MLD2_MODE_IS_EXCLUDE;
1651 type = MLD2_MODE_IS_INCLUDE;
1652 skb = add_grec(skb, pmc, type, 0, 0);
1653 spin_unlock_bh(&pmc->mca_lock);
1655 read_unlock_bh(&idev->lock);
1657 spin_lock_bh(&pmc->mca_lock);
1658 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1659 type = MLD2_MODE_IS_EXCLUDE;
1661 type = MLD2_MODE_IS_INCLUDE;
1662 skb = add_grec(skb, pmc, type, 0, 0);
1663 spin_unlock_bh(&pmc->mca_lock);
1670 * remove zero-count source records from a source filter list
1672 static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1674 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1677 for (psf=*ppsf; psf; psf = psf_next) {
1678 psf_next = psf->sf_next;
1679 if (psf->sf_crcount == 0) {
1681 psf_prev->sf_next = psf->sf_next;
1683 *ppsf = psf->sf_next;
1690 static void mld_send_cr(struct inet6_dev *idev)
1692 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1693 struct sk_buff *skb = NULL;
1696 read_lock_bh(&idev->lock);
1697 write_lock_bh(&idev->mc_lock);
1701 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1702 pmc_next = pmc->next;
1703 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1704 type = MLD2_BLOCK_OLD_SOURCES;
1705 dtype = MLD2_BLOCK_OLD_SOURCES;
1706 skb = add_grec(skb, pmc, type, 1, 0);
1707 skb = add_grec(skb, pmc, dtype, 1, 1);
1709 if (pmc->mca_crcount) {
1710 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1711 type = MLD2_CHANGE_TO_INCLUDE;
1712 skb = add_grec(skb, pmc, type, 1, 0);
1715 if (pmc->mca_crcount == 0) {
1716 mld_clear_zeros(&pmc->mca_tomb);
1717 mld_clear_zeros(&pmc->mca_sources);
1720 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1721 !pmc->mca_sources) {
1723 pmc_prev->next = pmc_next;
1725 idev->mc_tomb = pmc_next;
1726 in6_dev_put(pmc->idev);
1731 write_unlock_bh(&idev->mc_lock);
1734 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1735 spin_lock_bh(&pmc->mca_lock);
1736 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1737 type = MLD2_BLOCK_OLD_SOURCES;
1738 dtype = MLD2_ALLOW_NEW_SOURCES;
1740 type = MLD2_ALLOW_NEW_SOURCES;
1741 dtype = MLD2_BLOCK_OLD_SOURCES;
1743 skb = add_grec(skb, pmc, type, 0, 0);
1744 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1746 /* filter mode changes */
1747 if (pmc->mca_crcount) {
1748 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1749 type = MLD2_CHANGE_TO_EXCLUDE;
1751 type = MLD2_CHANGE_TO_INCLUDE;
1752 skb = add_grec(skb, pmc, type, 0, 0);
1755 spin_unlock_bh(&pmc->mca_lock);
1757 read_unlock_bh(&idev->lock);
1760 (void) mld_sendpack(skb);
1763 static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1765 struct net *net = dev_net(dev);
1766 struct sock *sk = net->ipv6.igmp_sk;
1767 struct inet6_dev *idev;
1768 struct sk_buff *skb;
1769 struct icmp6hdr *hdr;
1770 struct in6_addr *snd_addr;
1771 struct in6_addr *addrp;
1772 struct in6_addr addr_buf;
1773 struct in6_addr all_routers;
1774 int err, len, payload_len, full_len;
1775 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1776 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1781 IP6_INC_STATS(__in6_dev_get(dev),
1782 IPSTATS_MIB_OUTREQUESTS);
1785 if (type == ICMPV6_MGM_REDUCTION) {
1786 snd_addr = &all_routers;
1787 ipv6_addr_all_routers(&all_routers);
1790 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1791 payload_len = len + sizeof(ra);
1792 full_len = sizeof(struct ipv6hdr) + payload_len;
1794 skb = sock_alloc_send_skb(sk, LL_RESERVED_SPACE(dev) + full_len, 1, &err);
1798 IP6_INC_STATS(__in6_dev_get(dev),
1799 IPSTATS_MIB_OUTDISCARDS);
1804 skb_reserve(skb, LL_RESERVED_SPACE(dev));
1806 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1807 /* <draft-ietf-magma-mld-source-05.txt>:
1808 * use unspecified address as the source address
1809 * when a valid link-local address is not available.
1811 memset(&addr_buf, 0, sizeof(addr_buf));
1814 ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len);
1816 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1818 hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr));
1819 memset(hdr, 0, sizeof(struct icmp6hdr));
1820 hdr->icmp6_type = type;
1822 addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
1823 ipv6_addr_copy(addrp, addr);
1825 hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len,
1827 csum_partial((__u8 *) hdr, len, 0));
1829 idev = in6_dev_get(skb->dev);
1831 skb->dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
1837 icmpv6_flow_init(sk, &fl, type,
1838 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1841 err = xfrm_lookup(&skb->dst, &fl, NULL, 0);
1845 err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1849 ICMP6MSGOUT_INC_STATS(idev, type);
1850 ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS);
1851 IP6_INC_STATS(idev, IPSTATS_MIB_OUTMCASTPKTS);
1853 IP6_INC_STATS(idev, IPSTATS_MIB_OUTDISCARDS);
1855 if (likely(idev != NULL))
1864 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
1865 struct in6_addr *psfsrc)
1867 struct ip6_sf_list *psf, *psf_prev;
1871 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1872 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1876 if (!psf || psf->sf_count[sfmode] == 0) {
1877 /* source filter not found, or count wrong => bug */
1880 psf->sf_count[sfmode]--;
1881 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1882 struct inet6_dev *idev = pmc->idev;
1884 /* no more filters for this source */
1886 psf_prev->sf_next = psf->sf_next;
1888 pmc->mca_sources = psf->sf_next;
1889 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1890 !MLD_V1_SEEN(idev)) {
1891 psf->sf_crcount = idev->mc_qrv;
1892 psf->sf_next = pmc->mca_tomb;
1893 pmc->mca_tomb = psf;
1901 static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
1902 int sfmode, int sfcount, struct in6_addr *psfsrc,
1905 struct ifmcaddr6 *pmc;
1911 read_lock_bh(&idev->lock);
1912 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1913 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1917 /* MCA not found?? bug */
1918 read_unlock_bh(&idev->lock);
1921 spin_lock_bh(&pmc->mca_lock);
1924 if (!pmc->mca_sfcount[sfmode]) {
1925 spin_unlock_bh(&pmc->mca_lock);
1926 read_unlock_bh(&idev->lock);
1929 pmc->mca_sfcount[sfmode]--;
1932 for (i=0; i<sfcount; i++) {
1933 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1935 changerec |= rv > 0;
1939 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1940 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1941 pmc->mca_sfcount[MCAST_INCLUDE]) {
1942 struct ip6_sf_list *psf;
1944 /* filter mode change */
1945 pmc->mca_sfmode = MCAST_INCLUDE;
1946 pmc->mca_crcount = idev->mc_qrv;
1947 idev->mc_ifc_count = pmc->mca_crcount;
1948 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1949 psf->sf_crcount = 0;
1950 mld_ifc_event(pmc->idev);
1951 } else if (sf_setstate(pmc) || changerec)
1952 mld_ifc_event(pmc->idev);
1953 spin_unlock_bh(&pmc->mca_lock);
1954 read_unlock_bh(&idev->lock);
1959 * Add multicast single-source filter to the interface list
1961 static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
1962 struct in6_addr *psfsrc, int delta)
1964 struct ip6_sf_list *psf, *psf_prev;
1967 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1968 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1973 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
1977 psf->sf_addr = *psfsrc;
1979 psf_prev->sf_next = psf;
1981 pmc->mca_sources = psf;
1983 psf->sf_count[sfmode]++;
1987 static void sf_markstate(struct ifmcaddr6 *pmc)
1989 struct ip6_sf_list *psf;
1990 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1992 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1993 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1994 psf->sf_oldin = mca_xcount ==
1995 psf->sf_count[MCAST_EXCLUDE] &&
1996 !psf->sf_count[MCAST_INCLUDE];
1998 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
2001 static int sf_setstate(struct ifmcaddr6 *pmc)
2003 struct ip6_sf_list *psf, *dpsf;
2004 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
2005 int qrv = pmc->idev->mc_qrv;
2009 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
2010 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
2011 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
2012 !psf->sf_count[MCAST_INCLUDE];
2014 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
2016 if (!psf->sf_oldin) {
2017 struct ip6_sf_list *prev = NULL;
2019 for (dpsf=pmc->mca_tomb; dpsf;
2020 dpsf=dpsf->sf_next) {
2021 if (ipv6_addr_equal(&dpsf->sf_addr,
2028 prev->sf_next = dpsf->sf_next;
2030 pmc->mca_tomb = dpsf->sf_next;
2033 psf->sf_crcount = qrv;
2036 } else if (psf->sf_oldin) {
2037 psf->sf_crcount = 0;
2039 * add or update "delete" records if an active filter
2042 for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
2043 if (ipv6_addr_equal(&dpsf->sf_addr,
2047 dpsf = (struct ip6_sf_list *)
2048 kmalloc(sizeof(*dpsf), GFP_ATOMIC);
2052 /* pmc->mca_lock held by callers */
2053 dpsf->sf_next = pmc->mca_tomb;
2054 pmc->mca_tomb = dpsf;
2056 dpsf->sf_crcount = qrv;
2064 * Add multicast source filter list to the interface list
2066 static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
2067 int sfmode, int sfcount, struct in6_addr *psfsrc,
2070 struct ifmcaddr6 *pmc;
2076 read_lock_bh(&idev->lock);
2077 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2078 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2082 /* MCA not found?? bug */
2083 read_unlock_bh(&idev->lock);
2086 spin_lock_bh(&pmc->mca_lock);
2089 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2091 pmc->mca_sfcount[sfmode]++;
2093 for (i=0; i<sfcount; i++) {
2094 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
2102 pmc->mca_sfcount[sfmode]--;
2104 (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
2105 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
2106 struct inet6_dev *idev = pmc->idev;
2107 struct ip6_sf_list *psf;
2109 /* filter mode change */
2110 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2111 pmc->mca_sfmode = MCAST_EXCLUDE;
2112 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2113 pmc->mca_sfmode = MCAST_INCLUDE;
2114 /* else no filters; keep old mode for reports */
2116 pmc->mca_crcount = idev->mc_qrv;
2117 idev->mc_ifc_count = pmc->mca_crcount;
2118 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2119 psf->sf_crcount = 0;
2120 mld_ifc_event(idev);
2121 } else if (sf_setstate(pmc))
2122 mld_ifc_event(idev);
2123 spin_unlock_bh(&pmc->mca_lock);
2124 read_unlock_bh(&idev->lock);
2128 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2130 struct ip6_sf_list *psf, *nextpsf;
2132 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
2133 nextpsf = psf->sf_next;
2136 pmc->mca_tomb = NULL;
2137 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
2138 nextpsf = psf->sf_next;
2141 pmc->mca_sources = NULL;
2142 pmc->mca_sfmode = MCAST_EXCLUDE;
2143 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
2144 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2148 static void igmp6_join_group(struct ifmcaddr6 *ma)
2150 unsigned long delay;
2152 if (ma->mca_flags & MAF_NOREPORT)
2155 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2157 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
2159 spin_lock_bh(&ma->mca_lock);
2160 if (del_timer(&ma->mca_timer)) {
2161 atomic_dec(&ma->mca_refcnt);
2162 delay = ma->mca_timer.expires - jiffies;
2165 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2166 atomic_inc(&ma->mca_refcnt);
2167 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2168 spin_unlock_bh(&ma->mca_lock);
2171 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2172 struct inet6_dev *idev)
2176 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2177 * so no other readers or writers of iml or its sflist
2180 /* any-source empty exclude case */
2181 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2183 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2184 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2185 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2190 static void igmp6_leave_group(struct ifmcaddr6 *ma)
2192 if (MLD_V1_SEEN(ma->idev)) {
2193 if (ma->mca_flags & MAF_LAST_REPORTER)
2194 igmp6_send(&ma->mca_addr, ma->idev->dev,
2195 ICMPV6_MGM_REDUCTION);
2197 mld_add_delrec(ma->idev, ma);
2198 mld_ifc_event(ma->idev);
2202 static void mld_gq_timer_expire(unsigned long data)
2204 struct inet6_dev *idev = (struct inet6_dev *)data;
2206 idev->mc_gq_running = 0;
2207 mld_send_report(idev, NULL);
2208 __in6_dev_put(idev);
2211 static void mld_ifc_timer_expire(unsigned long data)
2213 struct inet6_dev *idev = (struct inet6_dev *)data;
2216 if (idev->mc_ifc_count) {
2217 idev->mc_ifc_count--;
2218 if (idev->mc_ifc_count)
2219 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2221 __in6_dev_put(idev);
2224 static void mld_ifc_event(struct inet6_dev *idev)
2226 if (MLD_V1_SEEN(idev))
2228 idev->mc_ifc_count = idev->mc_qrv;
2229 mld_ifc_start_timer(idev, 1);
2233 static void igmp6_timer_handler(unsigned long data)
2235 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2237 if (MLD_V1_SEEN(ma->idev))
2238 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2240 mld_send_report(ma->idev, ma);
2242 spin_lock(&ma->mca_lock);
2243 ma->mca_flags |= MAF_LAST_REPORTER;
2244 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2245 spin_unlock(&ma->mca_lock);
2249 /* Device going down */
2251 void ipv6_mc_down(struct inet6_dev *idev)
2253 struct ifmcaddr6 *i;
2255 /* Withdraw multicast list */
2257 read_lock_bh(&idev->lock);
2258 idev->mc_ifc_count = 0;
2259 if (del_timer(&idev->mc_ifc_timer))
2260 __in6_dev_put(idev);
2261 idev->mc_gq_running = 0;
2262 if (del_timer(&idev->mc_gq_timer))
2263 __in6_dev_put(idev);
2265 for (i = idev->mc_list; i; i=i->next)
2266 igmp6_group_dropped(i);
2267 read_unlock_bh(&idev->lock);
2269 mld_clear_delrec(idev);
2273 /* Device going up */
2275 void ipv6_mc_up(struct inet6_dev *idev)
2277 struct ifmcaddr6 *i;
2279 /* Install multicast list, except for all-nodes (already installed) */
2281 read_lock_bh(&idev->lock);
2282 for (i = idev->mc_list; i; i=i->next)
2283 igmp6_group_added(i);
2284 read_unlock_bh(&idev->lock);
2287 /* IPv6 device initialization. */
2289 void ipv6_mc_init_dev(struct inet6_dev *idev)
2291 write_lock_bh(&idev->lock);
2292 rwlock_init(&idev->mc_lock);
2293 idev->mc_gq_running = 0;
2294 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2295 (unsigned long)idev);
2296 idev->mc_tomb = NULL;
2297 idev->mc_ifc_count = 0;
2298 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2299 (unsigned long)idev);
2300 idev->mc_qrv = MLD_QRV_DEFAULT;
2301 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2302 idev->mc_v1_seen = 0;
2303 write_unlock_bh(&idev->lock);
2307 * Device is about to be destroyed: clean up.
2310 void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2312 struct ifmcaddr6 *i;
2313 struct in6_addr maddr;
2315 /* Deactivate timers */
2318 /* Delete all-nodes address. */
2319 ipv6_addr_all_nodes(&maddr);
2321 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2322 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2325 __ipv6_dev_mc_dec(idev, &maddr);
2327 if (idev->cnf.forwarding) {
2328 ipv6_addr_all_routers(&maddr);
2329 __ipv6_dev_mc_dec(idev, &maddr);
2332 write_lock_bh(&idev->lock);
2333 while ((i = idev->mc_list) != NULL) {
2334 idev->mc_list = i->next;
2335 write_unlock_bh(&idev->lock);
2337 igmp6_group_dropped(i);
2340 write_lock_bh(&idev->lock);
2342 write_unlock_bh(&idev->lock);
2345 #ifdef CONFIG_PROC_FS
2346 struct igmp6_mc_iter_state {
2347 struct seq_net_private p;
2348 struct net_device *dev;
2349 struct inet6_dev *idev;
2352 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2354 static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2356 struct ifmcaddr6 *im = NULL;
2357 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2358 struct net *net = state->p.net;
2361 for_each_netdev(net, state->dev) {
2362 struct inet6_dev *idev;
2363 idev = in6_dev_get(state->dev);
2366 read_lock_bh(&idev->lock);
2372 read_unlock_bh(&idev->lock);
2378 static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2380 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2384 if (likely(state->idev != NULL)) {
2385 read_unlock_bh(&state->idev->lock);
2386 in6_dev_put(state->idev);
2388 state->dev = next_net_device(state->dev);
2393 state->idev = in6_dev_get(state->dev);
2396 read_lock_bh(&state->idev->lock);
2397 im = state->idev->mc_list;
2402 static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2404 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2406 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2408 return pos ? NULL : im;
2411 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
2412 __acquires(dev_base_lock)
2414 read_lock(&dev_base_lock);
2415 return igmp6_mc_get_idx(seq, *pos);
2418 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2420 struct ifmcaddr6 *im;
2421 im = igmp6_mc_get_next(seq, v);
2426 static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
2427 __releases(dev_base_lock)
2429 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2430 if (likely(state->idev != NULL)) {
2431 read_unlock_bh(&state->idev->lock);
2432 in6_dev_put(state->idev);
2436 read_unlock(&dev_base_lock);
2439 static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2441 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2442 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2445 "%-4d %-15s " NIP6_SEQFMT " %5d %08X %ld\n",
2446 state->dev->ifindex, state->dev->name,
2448 im->mca_users, im->mca_flags,
2449 (im->mca_flags&MAF_TIMER_RUNNING) ?
2450 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2454 static const struct seq_operations igmp6_mc_seq_ops = {
2455 .start = igmp6_mc_seq_start,
2456 .next = igmp6_mc_seq_next,
2457 .stop = igmp6_mc_seq_stop,
2458 .show = igmp6_mc_seq_show,
2461 static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2463 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2464 sizeof(struct igmp6_mc_iter_state));
2467 static const struct file_operations igmp6_mc_seq_fops = {
2468 .owner = THIS_MODULE,
2469 .open = igmp6_mc_seq_open,
2471 .llseek = seq_lseek,
2472 .release = seq_release_net,
2475 struct igmp6_mcf_iter_state {
2476 struct seq_net_private p;
2477 struct net_device *dev;
2478 struct inet6_dev *idev;
2479 struct ifmcaddr6 *im;
2482 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2484 static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2486 struct ip6_sf_list *psf = NULL;
2487 struct ifmcaddr6 *im = NULL;
2488 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2489 struct net *net = state->p.net;
2493 for_each_netdev(net, state->dev) {
2494 struct inet6_dev *idev;
2495 idev = in6_dev_get(state->dev);
2496 if (unlikely(idev == NULL))
2498 read_lock_bh(&idev->lock);
2500 if (likely(im != NULL)) {
2501 spin_lock_bh(&im->mca_lock);
2502 psf = im->mca_sources;
2503 if (likely(psf != NULL)) {
2508 spin_unlock_bh(&im->mca_lock);
2510 read_unlock_bh(&idev->lock);
2516 static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2518 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2522 spin_unlock_bh(&state->im->mca_lock);
2523 state->im = state->im->next;
2524 while (!state->im) {
2525 if (likely(state->idev != NULL)) {
2526 read_unlock_bh(&state->idev->lock);
2527 in6_dev_put(state->idev);
2529 state->dev = next_net_device(state->dev);
2534 state->idev = in6_dev_get(state->dev);
2537 read_lock_bh(&state->idev->lock);
2538 state->im = state->idev->mc_list;
2542 spin_lock_bh(&state->im->mca_lock);
2543 psf = state->im->mca_sources;
2549 static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2551 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2553 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2555 return pos ? NULL : psf;
2558 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
2559 __acquires(dev_base_lock)
2561 read_lock(&dev_base_lock);
2562 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2565 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2567 struct ip6_sf_list *psf;
2568 if (v == SEQ_START_TOKEN)
2569 psf = igmp6_mcf_get_first(seq);
2571 psf = igmp6_mcf_get_next(seq, v);
2576 static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
2577 __releases(dev_base_lock)
2579 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2580 if (likely(state->im != NULL)) {
2581 spin_unlock_bh(&state->im->mca_lock);
2584 if (likely(state->idev != NULL)) {
2585 read_unlock_bh(&state->idev->lock);
2586 in6_dev_put(state->idev);
2590 read_unlock(&dev_base_lock);
2593 static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2595 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2596 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2598 if (v == SEQ_START_TOKEN) {
2601 "%32s %32s %6s %6s\n", "Idx",
2602 "Device", "Multicast Address",
2603 "Source Address", "INC", "EXC");
2606 "%3d %6.6s " NIP6_SEQFMT " " NIP6_SEQFMT " %6lu %6lu\n",
2607 state->dev->ifindex, state->dev->name,
2608 NIP6(state->im->mca_addr),
2610 psf->sf_count[MCAST_INCLUDE],
2611 psf->sf_count[MCAST_EXCLUDE]);
2616 static const struct seq_operations igmp6_mcf_seq_ops = {
2617 .start = igmp6_mcf_seq_start,
2618 .next = igmp6_mcf_seq_next,
2619 .stop = igmp6_mcf_seq_stop,
2620 .show = igmp6_mcf_seq_show,
2623 static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2625 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2626 sizeof(struct igmp6_mcf_iter_state));
2629 static const struct file_operations igmp6_mcf_seq_fops = {
2630 .owner = THIS_MODULE,
2631 .open = igmp6_mcf_seq_open,
2633 .llseek = seq_lseek,
2634 .release = seq_release_net,
2637 static int igmp6_proc_init(struct net *net)
2642 if (!proc_net_fops_create(net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops))
2644 if (!proc_net_fops_create(net, "mcfilter6", S_IRUGO,
2645 &igmp6_mcf_seq_fops))
2646 goto out_proc_net_igmp6;
2653 proc_net_remove(net, "igmp6");
2657 static void igmp6_proc_exit(struct net *net)
2659 proc_net_remove(net, "mcfilter6");
2660 proc_net_remove(net, "igmp6");
2663 static int igmp6_proc_init(struct net *net)
2667 static void igmp6_proc_exit(struct net *net)
2673 static int igmp6_net_init(struct net *net)
2675 struct ipv6_pinfo *np;
2676 struct socket *sock;
2680 err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &sock);
2683 "Failed to initialize the IGMP6 control socket (err %d).\n",
2688 net->ipv6.igmp_sk = sk = sock->sk;
2689 sk_change_net(sk, net);
2690 sk->sk_allocation = GFP_ATOMIC;
2691 sk->sk_prot->unhash(sk);
2696 err = igmp6_proc_init(net);
2698 goto out_sock_create;
2703 sk_release_kernel(net->ipv6.igmp_sk);
2707 static void igmp6_net_exit(struct net *net)
2709 sk_release_kernel(net->ipv6.igmp_sk);
2710 igmp6_proc_exit(net);
2713 static struct pernet_operations igmp6_net_ops = {
2714 .init = igmp6_net_init,
2715 .exit = igmp6_net_exit,
2718 int __init igmp6_init(void)
2720 return register_pernet_subsys(&igmp6_net_ops);
2723 void igmp6_cleanup(void)
2725 unregister_pernet_subsys(&igmp6_net_ops);