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, struct ifmcaddr6 *pmc);
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 ipv6_addr_copy(&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);
260 dst_release(&rt->dst);
263 dev = dev_get_by_index_rcu(net, ifindex);
267 idev = __in6_dev_get(dev);
270 read_lock_bh(&idev->lock);
272 read_unlock_bh(&idev->lock);
278 void ipv6_sock_mc_close(struct sock *sk)
280 struct ipv6_pinfo *np = inet6_sk(sk);
281 struct ipv6_mc_socklist *mc_lst;
282 struct net *net = sock_net(sk);
284 spin_lock(&ipv6_sk_mc_lock);
285 while ((mc_lst = rcu_dereference_protected(np->ipv6_mc_list,
286 lockdep_is_held(&ipv6_sk_mc_lock))) != NULL) {
287 struct net_device *dev;
289 np->ipv6_mc_list = mc_lst->next;
290 spin_unlock(&ipv6_sk_mc_lock);
293 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
295 struct inet6_dev *idev = __in6_dev_get(dev);
297 (void) ip6_mc_leave_src(sk, mc_lst, idev);
299 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
301 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
304 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
305 kfree_rcu(mc_lst, rcu);
307 spin_lock(&ipv6_sk_mc_lock);
309 spin_unlock(&ipv6_sk_mc_lock);
312 int ip6_mc_source(int add, int omode, struct sock *sk,
313 struct group_source_req *pgsr)
315 struct in6_addr *source, *group;
316 struct ipv6_mc_socklist *pmc;
317 struct inet6_dev *idev;
318 struct ipv6_pinfo *inet6 = inet6_sk(sk);
319 struct ip6_sf_socklist *psl;
320 struct net *net = sock_net(sk);
326 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
327 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
329 if (!ipv6_addr_is_multicast(group))
333 idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface);
339 err = -EADDRNOTAVAIL;
341 for_each_pmc_rcu(inet6, pmc) {
342 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
344 if (ipv6_addr_equal(&pmc->addr, group))
347 if (!pmc) { /* must have a prior join */
351 /* if a source filter was set, must be the same mode as before */
353 if (pmc->sfmode != omode) {
357 } else if (pmc->sfmode != omode) {
358 /* allow mode switches for empty-set filters */
359 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
360 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
364 write_lock(&pmc->sflock);
370 goto done; /* err = -EADDRNOTAVAIL */
372 for (i=0; i<psl->sl_count; i++) {
373 rv = memcmp(&psl->sl_addr[i], source,
374 sizeof(struct in6_addr));
378 if (rv) /* source not found */
379 goto done; /* err = -EADDRNOTAVAIL */
381 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
382 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
387 /* update the interface filter */
388 ip6_mc_del_src(idev, group, omode, 1, source, 1);
390 for (j=i+1; j<psl->sl_count; j++)
391 psl->sl_addr[j-1] = psl->sl_addr[j];
396 /* else, add a new source to the filter */
398 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
402 if (!psl || psl->sl_count == psl->sl_max) {
403 struct ip6_sf_socklist *newpsl;
404 int count = IP6_SFBLOCK;
407 count += psl->sl_max;
408 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
413 newpsl->sl_max = count;
414 newpsl->sl_count = count - IP6_SFBLOCK;
416 for (i=0; i<psl->sl_count; i++)
417 newpsl->sl_addr[i] = psl->sl_addr[i];
418 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
420 pmc->sflist = psl = newpsl;
422 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
423 for (i=0; i<psl->sl_count; i++) {
424 rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr));
428 if (rv == 0) /* address already there is an error */
430 for (j=psl->sl_count-1; j>=i; j--)
431 psl->sl_addr[j+1] = psl->sl_addr[j];
432 psl->sl_addr[i] = *source;
435 /* update the interface list */
436 ip6_mc_add_src(idev, group, omode, 1, source, 1);
439 write_unlock(&pmc->sflock);
440 read_unlock_bh(&idev->lock);
443 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
447 int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
449 const struct in6_addr *group;
450 struct ipv6_mc_socklist *pmc;
451 struct inet6_dev *idev;
452 struct ipv6_pinfo *inet6 = inet6_sk(sk);
453 struct ip6_sf_socklist *newpsl, *psl;
454 struct net *net = sock_net(sk);
458 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
460 if (!ipv6_addr_is_multicast(group))
462 if (gsf->gf_fmode != MCAST_INCLUDE &&
463 gsf->gf_fmode != MCAST_EXCLUDE)
467 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
476 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
481 for_each_pmc_rcu(inet6, pmc) {
482 if (pmc->ifindex != gsf->gf_interface)
484 if (ipv6_addr_equal(&pmc->addr, group))
487 if (!pmc) { /* must have a prior join */
491 if (gsf->gf_numsrc) {
492 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
498 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
499 for (i=0; i<newpsl->sl_count; ++i) {
500 struct sockaddr_in6 *psin6;
502 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
503 newpsl->sl_addr[i] = psin6->sin6_addr;
505 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
506 newpsl->sl_count, newpsl->sl_addr, 0);
508 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
513 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
516 write_lock(&pmc->sflock);
519 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
520 psl->sl_count, psl->sl_addr, 0);
521 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
523 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
524 pmc->sflist = newpsl;
525 pmc->sfmode = gsf->gf_fmode;
526 write_unlock(&pmc->sflock);
529 read_unlock_bh(&idev->lock);
532 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
536 int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
537 struct group_filter __user *optval, int __user *optlen)
539 int err, i, count, copycount;
540 const struct in6_addr *group;
541 struct ipv6_mc_socklist *pmc;
542 struct inet6_dev *idev;
543 struct ipv6_pinfo *inet6 = inet6_sk(sk);
544 struct ip6_sf_socklist *psl;
545 struct net *net = sock_net(sk);
547 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
549 if (!ipv6_addr_is_multicast(group))
553 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
560 err = -EADDRNOTAVAIL;
562 * changes to the ipv6_mc_list require the socket lock and
563 * a read lock on ip6_sk_mc_lock. We have the socket lock,
564 * so reading the list is safe.
567 for_each_pmc_rcu(inet6, pmc) {
568 if (pmc->ifindex != gsf->gf_interface)
570 if (ipv6_addr_equal(group, &pmc->addr))
573 if (!pmc) /* must have a prior join */
575 gsf->gf_fmode = pmc->sfmode;
577 count = psl ? psl->sl_count : 0;
578 read_unlock_bh(&idev->lock);
581 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
582 gsf->gf_numsrc = count;
583 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
584 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
587 /* changes to psl require the socket lock, a read lock on
588 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
589 * have the socket lock, so reading here is safe.
591 for (i=0; i<copycount; i++) {
592 struct sockaddr_in6 *psin6;
593 struct sockaddr_storage ss;
595 psin6 = (struct sockaddr_in6 *)&ss;
596 memset(&ss, 0, sizeof(ss));
597 psin6->sin6_family = AF_INET6;
598 psin6->sin6_addr = psl->sl_addr[i];
599 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
604 read_unlock_bh(&idev->lock);
609 int inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
610 const struct in6_addr *src_addr)
612 struct ipv6_pinfo *np = inet6_sk(sk);
613 struct ipv6_mc_socklist *mc;
614 struct ip6_sf_socklist *psl;
618 for_each_pmc_rcu(np, mc) {
619 if (ipv6_addr_equal(&mc->addr, mc_addr))
626 read_lock(&mc->sflock);
629 rv = mc->sfmode == MCAST_EXCLUDE;
633 for (i=0; i<psl->sl_count; i++) {
634 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
637 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
639 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
642 read_unlock(&mc->sflock);
648 static void ma_put(struct ifmcaddr6 *mc)
650 if (atomic_dec_and_test(&mc->mca_refcnt)) {
651 in6_dev_put(mc->idev);
656 static void igmp6_group_added(struct ifmcaddr6 *mc)
658 struct net_device *dev = mc->idev->dev;
659 char buf[MAX_ADDR_LEN];
661 spin_lock_bh(&mc->mca_lock);
662 if (!(mc->mca_flags&MAF_LOADED)) {
663 mc->mca_flags |= MAF_LOADED;
664 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
665 dev_mc_add(dev, buf);
667 spin_unlock_bh(&mc->mca_lock);
669 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
672 if (MLD_V1_SEEN(mc->idev)) {
673 igmp6_join_group(mc);
678 mc->mca_crcount = mc->idev->mc_qrv;
679 mld_ifc_event(mc->idev);
682 static void igmp6_group_dropped(struct ifmcaddr6 *mc)
684 struct net_device *dev = mc->idev->dev;
685 char buf[MAX_ADDR_LEN];
687 spin_lock_bh(&mc->mca_lock);
688 if (mc->mca_flags&MAF_LOADED) {
689 mc->mca_flags &= ~MAF_LOADED;
690 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
691 dev_mc_del(dev, buf);
694 spin_unlock_bh(&mc->mca_lock);
695 if (mc->mca_flags & MAF_NOREPORT)
699 igmp6_leave_group(mc);
701 spin_lock_bh(&mc->mca_lock);
702 if (del_timer(&mc->mca_timer))
703 atomic_dec(&mc->mca_refcnt);
704 spin_unlock_bh(&mc->mca_lock);
708 * deleted ifmcaddr6 manipulation
710 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
712 struct ifmcaddr6 *pmc;
714 /* this is an "ifmcaddr6" for convenience; only the fields below
715 * are actually used. In particular, the refcnt and users are not
716 * used for management of the delete list. Using the same structure
717 * for deleted items allows change reports to use common code with
718 * non-deleted or query-response MCA's.
720 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
724 spin_lock_bh(&im->mca_lock);
725 spin_lock_init(&pmc->mca_lock);
726 pmc->idev = im->idev;
728 pmc->mca_addr = im->mca_addr;
729 pmc->mca_crcount = idev->mc_qrv;
730 pmc->mca_sfmode = im->mca_sfmode;
731 if (pmc->mca_sfmode == MCAST_INCLUDE) {
732 struct ip6_sf_list *psf;
734 pmc->mca_tomb = im->mca_tomb;
735 pmc->mca_sources = im->mca_sources;
736 im->mca_tomb = im->mca_sources = NULL;
737 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
738 psf->sf_crcount = pmc->mca_crcount;
740 spin_unlock_bh(&im->mca_lock);
742 spin_lock_bh(&idev->mc_lock);
743 pmc->next = idev->mc_tomb;
745 spin_unlock_bh(&idev->mc_lock);
748 static void mld_del_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
750 struct ifmcaddr6 *pmc, *pmc_prev;
751 struct ip6_sf_list *psf;
752 struct in6_addr *pmca = &im->mca_addr;
754 spin_lock_bh(&idev->mc_lock);
756 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
757 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
763 pmc_prev->next = pmc->next;
765 idev->mc_tomb = pmc->next;
767 spin_unlock_bh(&idev->mc_lock);
769 spin_lock_bh(&im->mca_lock);
771 im->idev = pmc->idev;
772 im->mca_crcount = idev->mc_qrv;
773 im->mca_sfmode = pmc->mca_sfmode;
774 if (pmc->mca_sfmode == MCAST_INCLUDE) {
775 im->mca_tomb = pmc->mca_tomb;
776 im->mca_sources = pmc->mca_sources;
777 for (psf = im->mca_sources; psf; psf = psf->sf_next)
778 psf->sf_crcount = im->mca_crcount;
780 in6_dev_put(pmc->idev);
783 spin_unlock_bh(&im->mca_lock);
786 static void mld_clear_delrec(struct inet6_dev *idev)
788 struct ifmcaddr6 *pmc, *nextpmc;
790 spin_lock_bh(&idev->mc_lock);
792 idev->mc_tomb = NULL;
793 spin_unlock_bh(&idev->mc_lock);
795 for (; pmc; pmc = nextpmc) {
797 ip6_mc_clear_src(pmc);
798 in6_dev_put(pmc->idev);
802 /* clear dead sources, too */
803 read_lock_bh(&idev->lock);
804 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
805 struct ip6_sf_list *psf, *psf_next;
807 spin_lock_bh(&pmc->mca_lock);
809 pmc->mca_tomb = NULL;
810 spin_unlock_bh(&pmc->mca_lock);
811 for (; psf; psf=psf_next) {
812 psf_next = psf->sf_next;
816 read_unlock_bh(&idev->lock);
821 * device multicast group inc (add if not found)
823 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
825 struct ifmcaddr6 *mc;
826 struct inet6_dev *idev;
828 /* we need to take a reference on idev */
829 idev = in6_dev_get(dev);
834 write_lock_bh(&idev->lock);
836 write_unlock_bh(&idev->lock);
841 for (mc = idev->mc_list; mc; mc = mc->next) {
842 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
844 write_unlock_bh(&idev->lock);
845 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
853 * not found: create a new one.
856 mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
859 write_unlock_bh(&idev->lock);
864 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
866 ipv6_addr_copy(&mc->mca_addr, addr);
867 mc->idev = idev; /* (reference taken) */
869 /* mca_stamp should be updated upon changes */
870 mc->mca_cstamp = mc->mca_tstamp = jiffies;
871 atomic_set(&mc->mca_refcnt, 2);
872 spin_lock_init(&mc->mca_lock);
874 /* initial mode is (EX, empty) */
875 mc->mca_sfmode = MCAST_EXCLUDE;
876 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
878 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
879 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
880 mc->mca_flags |= MAF_NOREPORT;
882 mc->next = idev->mc_list;
884 write_unlock_bh(&idev->lock);
886 mld_del_delrec(idev, mc);
887 igmp6_group_added(mc);
893 * device multicast group del
895 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
897 struct ifmcaddr6 *ma, **map;
899 write_lock_bh(&idev->lock);
900 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
901 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
902 if (--ma->mca_users == 0) {
904 write_unlock_bh(&idev->lock);
906 igmp6_group_dropped(ma);
907 ip6_mc_clear_src(ma);
912 write_unlock_bh(&idev->lock);
916 write_unlock_bh(&idev->lock);
921 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
923 struct inet6_dev *idev;
928 idev = __in6_dev_get(dev);
932 err = __ipv6_dev_mc_dec(idev, addr);
939 * identify MLD packets for MLD filter exceptions
941 int ipv6_is_mld(struct sk_buff *skb, int nexthdr)
943 struct icmp6hdr *pic;
945 if (nexthdr != IPPROTO_ICMPV6)
948 if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
951 pic = icmp6_hdr(skb);
953 switch (pic->icmp6_type) {
954 case ICMPV6_MGM_QUERY:
955 case ICMPV6_MGM_REPORT:
956 case ICMPV6_MGM_REDUCTION:
957 case ICMPV6_MLD2_REPORT:
966 * check if the interface/address pair is valid
968 int ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
969 const struct in6_addr *src_addr)
971 struct inet6_dev *idev;
972 struct ifmcaddr6 *mc;
976 idev = __in6_dev_get(dev);
978 read_lock_bh(&idev->lock);
979 for (mc = idev->mc_list; mc; mc=mc->next) {
980 if (ipv6_addr_equal(&mc->mca_addr, group))
984 if (src_addr && !ipv6_addr_any(src_addr)) {
985 struct ip6_sf_list *psf;
987 spin_lock_bh(&mc->mca_lock);
988 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
989 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
993 rv = psf->sf_count[MCAST_INCLUDE] ||
994 psf->sf_count[MCAST_EXCLUDE] !=
995 mc->mca_sfcount[MCAST_EXCLUDE];
997 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
998 spin_unlock_bh(&mc->mca_lock);
1000 rv = 1; /* don't filter unspecified source */
1002 read_unlock_bh(&idev->lock);
1008 static void mld_gq_start_timer(struct inet6_dev *idev)
1010 int tv = net_random() % idev->mc_maxdelay;
1012 idev->mc_gq_running = 1;
1013 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1017 static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
1019 int tv = net_random() % delay;
1021 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1026 * IGMP handling (alias multicast ICMPv6 messages)
1029 static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1031 unsigned long delay = resptime;
1033 /* Do not start timer for these addresses */
1034 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1035 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1038 if (del_timer(&ma->mca_timer)) {
1039 atomic_dec(&ma->mca_refcnt);
1040 delay = ma->mca_timer.expires - jiffies;
1043 if (delay >= resptime) {
1045 delay = net_random() % resptime;
1049 ma->mca_timer.expires = jiffies + delay;
1050 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1051 atomic_inc(&ma->mca_refcnt);
1052 ma->mca_flags |= MAF_TIMER_RUNNING;
1055 /* mark EXCLUDE-mode sources */
1056 static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
1057 const struct in6_addr *srcs)
1059 struct ip6_sf_list *psf;
1063 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1064 if (scount == nsrcs)
1066 for (i=0; i<nsrcs; i++) {
1067 /* skip inactive filters */
1068 if (psf->sf_count[MCAST_INCLUDE] ||
1069 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1070 psf->sf_count[MCAST_EXCLUDE])
1072 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1078 pmc->mca_flags &= ~MAF_GSQUERY;
1079 if (scount == nsrcs) /* all sources excluded */
1084 static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1085 const struct in6_addr *srcs)
1087 struct ip6_sf_list *psf;
1090 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1091 return mld_xmarksources(pmc, nsrcs, srcs);
1093 /* mark INCLUDE-mode sources */
1096 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1097 if (scount == nsrcs)
1099 for (i=0; i<nsrcs; i++) {
1100 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1108 pmc->mca_flags &= ~MAF_GSQUERY;
1111 pmc->mca_flags |= MAF_GSQUERY;
1115 /* called with rcu_read_lock() */
1116 int igmp6_event_query(struct sk_buff *skb)
1118 struct mld2_query *mlh2 = NULL;
1119 struct ifmcaddr6 *ma;
1120 const struct in6_addr *group;
1121 unsigned long max_delay;
1122 struct inet6_dev *idev;
1123 struct mld_msg *mld;
1128 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1131 /* compute payload length excluding extension headers */
1132 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
1133 len -= skb_network_header_len(skb);
1135 /* Drop queries with not link local source */
1136 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
1139 idev = __in6_dev_get(skb->dev);
1144 mld = (struct mld_msg *)icmp6_hdr(skb);
1145 group = &mld->mld_mca;
1146 group_type = ipv6_addr_type(group);
1148 if (group_type != IPV6_ADDR_ANY &&
1149 !(group_type&IPV6_ADDR_MULTICAST))
1154 /* MLDv1 router present */
1156 /* Translate milliseconds to jiffies */
1157 max_delay = (ntohs(mld->mld_maxdelay)*HZ)/1000;
1159 switchback = (idev->mc_qrv + 1) * max_delay;
1160 idev->mc_v1_seen = jiffies + switchback;
1162 /* cancel the interface change timer */
1163 idev->mc_ifc_count = 0;
1164 if (del_timer(&idev->mc_ifc_timer))
1165 __in6_dev_put(idev);
1166 /* clear deleted report items */
1167 mld_clear_delrec(idev);
1168 } else if (len >= 28) {
1169 int srcs_offset = sizeof(struct mld2_query) -
1170 sizeof(struct icmp6hdr);
1171 if (!pskb_may_pull(skb, srcs_offset))
1174 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1175 max_delay = (MLDV2_MRC(ntohs(mlh2->mld2q_mrc))*HZ)/1000;
1178 idev->mc_maxdelay = max_delay;
1179 if (mlh2->mld2q_qrv)
1180 idev->mc_qrv = mlh2->mld2q_qrv;
1181 if (group_type == IPV6_ADDR_ANY) { /* general query */
1182 if (mlh2->mld2q_nsrcs)
1183 return -EINVAL; /* no sources allowed */
1185 mld_gq_start_timer(idev);
1188 /* mark sources to include, if group & source-specific */
1189 if (mlh2->mld2q_nsrcs != 0) {
1190 if (!pskb_may_pull(skb, srcs_offset +
1191 ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr)))
1194 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1200 read_lock_bh(&idev->lock);
1201 if (group_type == IPV6_ADDR_ANY) {
1202 for (ma = idev->mc_list; ma; ma=ma->next) {
1203 spin_lock_bh(&ma->mca_lock);
1204 igmp6_group_queried(ma, max_delay);
1205 spin_unlock_bh(&ma->mca_lock);
1208 for (ma = idev->mc_list; ma; ma=ma->next) {
1209 if (!ipv6_addr_equal(group, &ma->mca_addr))
1211 spin_lock_bh(&ma->mca_lock);
1212 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1213 /* gsquery <- gsquery && mark */
1215 ma->mca_flags &= ~MAF_GSQUERY;
1217 /* gsquery <- mark */
1219 ma->mca_flags |= MAF_GSQUERY;
1221 ma->mca_flags &= ~MAF_GSQUERY;
1223 if (!(ma->mca_flags & MAF_GSQUERY) ||
1224 mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs))
1225 igmp6_group_queried(ma, max_delay);
1226 spin_unlock_bh(&ma->mca_lock);
1230 read_unlock_bh(&idev->lock);
1235 /* called with rcu_read_lock() */
1236 int igmp6_event_report(struct sk_buff *skb)
1238 struct ifmcaddr6 *ma;
1239 struct inet6_dev *idev;
1240 struct mld_msg *mld;
1243 /* Our own report looped back. Ignore it. */
1244 if (skb->pkt_type == PACKET_LOOPBACK)
1247 /* send our report if the MC router may not have heard this report */
1248 if (skb->pkt_type != PACKET_MULTICAST &&
1249 skb->pkt_type != PACKET_BROADCAST)
1252 if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr)))
1255 mld = (struct mld_msg *)icmp6_hdr(skb);
1257 /* Drop reports with not link local source */
1258 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
1259 if (addr_type != IPV6_ADDR_ANY &&
1260 !(addr_type&IPV6_ADDR_LINKLOCAL))
1263 idev = __in6_dev_get(skb->dev);
1268 * Cancel the timer for this group
1271 read_lock_bh(&idev->lock);
1272 for (ma = idev->mc_list; ma; ma=ma->next) {
1273 if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) {
1274 spin_lock(&ma->mca_lock);
1275 if (del_timer(&ma->mca_timer))
1276 atomic_dec(&ma->mca_refcnt);
1277 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1278 spin_unlock(&ma->mca_lock);
1282 read_unlock_bh(&idev->lock);
1286 static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1287 int gdeleted, int sdeleted)
1290 case MLD2_MODE_IS_INCLUDE:
1291 case MLD2_MODE_IS_EXCLUDE:
1292 if (gdeleted || sdeleted)
1294 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1295 if (pmc->mca_sfmode == MCAST_INCLUDE)
1297 /* don't include if this source is excluded
1300 if (psf->sf_count[MCAST_INCLUDE])
1301 return type == MLD2_MODE_IS_INCLUDE;
1302 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1303 psf->sf_count[MCAST_EXCLUDE];
1306 case MLD2_CHANGE_TO_INCLUDE:
1307 if (gdeleted || sdeleted)
1309 return psf->sf_count[MCAST_INCLUDE] != 0;
1310 case MLD2_CHANGE_TO_EXCLUDE:
1311 if (gdeleted || sdeleted)
1313 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1314 psf->sf_count[MCAST_INCLUDE])
1316 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1317 psf->sf_count[MCAST_EXCLUDE];
1318 case MLD2_ALLOW_NEW_SOURCES:
1319 if (gdeleted || !psf->sf_crcount)
1321 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1322 case MLD2_BLOCK_OLD_SOURCES:
1323 if (pmc->mca_sfmode == MCAST_INCLUDE)
1324 return gdeleted || (psf->sf_crcount && sdeleted);
1325 return psf->sf_crcount && !gdeleted && !sdeleted;
1331 mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1333 struct ip6_sf_list *psf;
1336 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1337 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1344 static struct sk_buff *mld_newpack(struct inet6_dev *idev, unsigned int mtu)
1346 struct net_device *dev = idev->dev;
1347 struct net *net = dev_net(dev);
1348 struct sock *sk = net->ipv6.igmp_sk;
1349 struct sk_buff *skb;
1350 struct mld2_report *pmr;
1351 struct in6_addr addr_buf;
1352 const struct in6_addr *saddr;
1353 int hlen = LL_RESERVED_SPACE(dev);
1354 int tlen = dev->needed_tailroom;
1355 unsigned int size = mtu + hlen + tlen;
1357 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1358 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1361 /* we assume size > sizeof(ra) here */
1362 /* limit our allocations to order-0 page */
1363 size = min_t(int, size, SKB_MAX_ORDER(0, 0));
1364 skb = sock_alloc_send_skb(sk, size, 1, &err);
1369 skb_reserve(skb, hlen);
1370 skb_tailroom_reserve(skb, mtu, tlen);
1372 if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) {
1373 /* <draft-ietf-magma-mld-source-05.txt>:
1374 * use unspecified address as the source address
1375 * when a valid link-local address is not available.
1377 saddr = &in6addr_any;
1381 ip6_nd_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0);
1383 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1385 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
1386 skb_put(skb, sizeof(*pmr));
1387 pmr = (struct mld2_report *)skb_transport_header(skb);
1388 pmr->mld2r_type = ICMPV6_MLD2_REPORT;
1389 pmr->mld2r_resv1 = 0;
1390 pmr->mld2r_cksum = 0;
1391 pmr->mld2r_resv2 = 0;
1392 pmr->mld2r_ngrec = 0;
1396 static void mld_sendpack(struct sk_buff *skb)
1398 struct ipv6hdr *pip6 = ipv6_hdr(skb);
1399 struct mld2_report *pmr =
1400 (struct mld2_report *)skb_transport_header(skb);
1401 int payload_len, mldlen;
1402 struct inet6_dev *idev;
1403 struct net *net = dev_net(skb->dev);
1406 struct dst_entry *dst;
1409 idev = __in6_dev_get(skb->dev);
1410 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
1412 payload_len = (skb->tail - skb->network_header) - sizeof(*pip6);
1413 mldlen = skb->tail - skb->transport_header;
1414 pip6->payload_len = htons(payload_len);
1416 pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1418 csum_partial(skb_transport_header(skb),
1421 dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
1428 icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT,
1429 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1432 dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), NULL, 0);
1438 skb_dst_set(skb, dst);
1442 payload_len = skb->len;
1444 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1448 ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT);
1449 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
1451 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
1462 static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1464 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
1467 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1468 int type, struct mld2_grec **ppgr)
1470 struct net_device *dev = pmc->idev->dev;
1471 struct mld2_report *pmr;
1472 struct mld2_grec *pgr;
1475 skb = mld_newpack(pmc->idev, dev->mtu);
1478 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1479 pgr->grec_type = type;
1480 pgr->grec_auxwords = 0;
1481 pgr->grec_nsrcs = 0;
1482 pgr->grec_mca = pmc->mca_addr; /* structure copy */
1483 pmr = (struct mld2_report *)skb_transport_header(skb);
1484 pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1);
1489 #define AVAILABLE(skb) ((skb) ? skb_availroom(skb) : 0)
1491 static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1492 int type, int gdeleted, int sdeleted)
1494 struct inet6_dev *idev = pmc->idev;
1495 struct net_device *dev = idev->dev;
1496 struct mld2_report *pmr;
1497 struct mld2_grec *pgr = NULL;
1498 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
1499 int scount, stotal, first, isquery, truncate;
1501 if (pmc->mca_flags & MAF_NOREPORT)
1504 isquery = type == MLD2_MODE_IS_INCLUDE ||
1505 type == MLD2_MODE_IS_EXCLUDE;
1506 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1507 type == MLD2_CHANGE_TO_EXCLUDE;
1509 stotal = scount = 0;
1511 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1516 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
1518 /* EX and TO_EX get a fresh packet, if needed */
1520 if (pmr && pmr->mld2r_ngrec &&
1521 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1524 skb = mld_newpack(idev, dev->mtu);
1529 for (psf=*psf_list; psf; psf=psf_next) {
1530 struct in6_addr *psrc;
1532 psf_next = psf->sf_next;
1534 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1539 /* clear marks on query responses */
1543 if (AVAILABLE(skb) < sizeof(*psrc) +
1544 first*sizeof(struct mld2_grec)) {
1545 if (truncate && !first)
1546 break; /* truncate these */
1548 pgr->grec_nsrcs = htons(scount);
1551 skb = mld_newpack(idev, dev->mtu);
1556 skb = add_grhead(skb, pmc, type, &pgr);
1561 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1562 *psrc = psf->sf_addr;
1564 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1565 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1567 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1569 psf_prev->sf_next = psf->sf_next;
1571 *psf_list = psf->sf_next;
1581 if (type == MLD2_ALLOW_NEW_SOURCES ||
1582 type == MLD2_BLOCK_OLD_SOURCES)
1584 if (pmc->mca_crcount || isquery) {
1585 /* make sure we have room for group header */
1586 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1588 skb = NULL; /* add_grhead will get a new one */
1590 skb = add_grhead(skb, pmc, type, &pgr);
1594 pgr->grec_nsrcs = htons(scount);
1597 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1601 static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1603 struct sk_buff *skb = NULL;
1606 read_lock_bh(&idev->lock);
1608 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1609 if (pmc->mca_flags & MAF_NOREPORT)
1611 spin_lock_bh(&pmc->mca_lock);
1612 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1613 type = MLD2_MODE_IS_EXCLUDE;
1615 type = MLD2_MODE_IS_INCLUDE;
1616 skb = add_grec(skb, pmc, type, 0, 0);
1617 spin_unlock_bh(&pmc->mca_lock);
1620 spin_lock_bh(&pmc->mca_lock);
1621 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1622 type = MLD2_MODE_IS_EXCLUDE;
1624 type = MLD2_MODE_IS_INCLUDE;
1625 skb = add_grec(skb, pmc, type, 0, 0);
1626 spin_unlock_bh(&pmc->mca_lock);
1628 read_unlock_bh(&idev->lock);
1634 * remove zero-count source records from a source filter list
1636 static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1638 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1641 for (psf=*ppsf; psf; psf = psf_next) {
1642 psf_next = psf->sf_next;
1643 if (psf->sf_crcount == 0) {
1645 psf_prev->sf_next = psf->sf_next;
1647 *ppsf = psf->sf_next;
1654 static void mld_send_cr(struct inet6_dev *idev)
1656 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1657 struct sk_buff *skb = NULL;
1660 read_lock_bh(&idev->lock);
1661 spin_lock(&idev->mc_lock);
1665 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1666 pmc_next = pmc->next;
1667 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1668 type = MLD2_BLOCK_OLD_SOURCES;
1669 dtype = MLD2_BLOCK_OLD_SOURCES;
1670 skb = add_grec(skb, pmc, type, 1, 0);
1671 skb = add_grec(skb, pmc, dtype, 1, 1);
1673 if (pmc->mca_crcount) {
1674 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1675 type = MLD2_CHANGE_TO_INCLUDE;
1676 skb = add_grec(skb, pmc, type, 1, 0);
1679 if (pmc->mca_crcount == 0) {
1680 mld_clear_zeros(&pmc->mca_tomb);
1681 mld_clear_zeros(&pmc->mca_sources);
1684 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1685 !pmc->mca_sources) {
1687 pmc_prev->next = pmc_next;
1689 idev->mc_tomb = pmc_next;
1690 in6_dev_put(pmc->idev);
1695 spin_unlock(&idev->mc_lock);
1698 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1699 spin_lock_bh(&pmc->mca_lock);
1700 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1701 type = MLD2_BLOCK_OLD_SOURCES;
1702 dtype = MLD2_ALLOW_NEW_SOURCES;
1704 type = MLD2_ALLOW_NEW_SOURCES;
1705 dtype = MLD2_BLOCK_OLD_SOURCES;
1707 skb = add_grec(skb, pmc, type, 0, 0);
1708 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1710 /* filter mode changes */
1711 if (pmc->mca_crcount) {
1712 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1713 type = MLD2_CHANGE_TO_EXCLUDE;
1715 type = MLD2_CHANGE_TO_INCLUDE;
1716 skb = add_grec(skb, pmc, type, 0, 0);
1719 spin_unlock_bh(&pmc->mca_lock);
1721 read_unlock_bh(&idev->lock);
1724 (void) mld_sendpack(skb);
1727 static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1729 struct net *net = dev_net(dev);
1730 struct sock *sk = net->ipv6.igmp_sk;
1731 struct inet6_dev *idev;
1732 struct sk_buff *skb;
1733 struct mld_msg *hdr;
1734 const struct in6_addr *snd_addr, *saddr;
1735 struct in6_addr addr_buf;
1736 int hlen = LL_RESERVED_SPACE(dev);
1737 int tlen = dev->needed_tailroom;
1738 int err, len, payload_len, full_len;
1739 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1740 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1743 struct dst_entry *dst;
1745 if (type == ICMPV6_MGM_REDUCTION)
1746 snd_addr = &in6addr_linklocal_allrouters;
1750 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1751 payload_len = len + sizeof(ra);
1752 full_len = sizeof(struct ipv6hdr) + payload_len;
1755 IP6_UPD_PO_STATS(net, __in6_dev_get(dev),
1756 IPSTATS_MIB_OUT, full_len);
1759 skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err);
1763 IP6_INC_STATS(net, __in6_dev_get(dev),
1764 IPSTATS_MIB_OUTDISCARDS);
1769 skb_reserve(skb, hlen);
1771 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1772 /* <draft-ietf-magma-mld-source-05.txt>:
1773 * use unspecified address as the source address
1774 * when a valid link-local address is not available.
1776 saddr = &in6addr_any;
1780 ip6_nd_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len);
1782 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1784 hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg));
1785 memset(hdr, 0, sizeof(struct mld_msg));
1786 hdr->mld_type = type;
1787 ipv6_addr_copy(&hdr->mld_mca, addr);
1789 hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len,
1791 csum_partial(hdr, len, 0));
1794 idev = __in6_dev_get(skb->dev);
1796 dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
1802 icmpv6_flow_init(sk, &fl6, type,
1803 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1806 dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), NULL, 0);
1812 skb_dst_set(skb, dst);
1813 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1817 ICMP6MSGOUT_INC_STATS(net, idev, type);
1818 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
1820 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
1830 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
1831 const struct in6_addr *psfsrc)
1833 struct ip6_sf_list *psf, *psf_prev;
1837 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1838 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1842 if (!psf || psf->sf_count[sfmode] == 0) {
1843 /* source filter not found, or count wrong => bug */
1846 psf->sf_count[sfmode]--;
1847 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1848 struct inet6_dev *idev = pmc->idev;
1850 /* no more filters for this source */
1852 psf_prev->sf_next = psf->sf_next;
1854 pmc->mca_sources = psf->sf_next;
1855 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1856 !MLD_V1_SEEN(idev)) {
1857 psf->sf_crcount = idev->mc_qrv;
1858 psf->sf_next = pmc->mca_tomb;
1859 pmc->mca_tomb = psf;
1867 static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
1868 int sfmode, int sfcount, const struct in6_addr *psfsrc,
1871 struct ifmcaddr6 *pmc;
1877 read_lock_bh(&idev->lock);
1878 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1879 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1883 /* MCA not found?? bug */
1884 read_unlock_bh(&idev->lock);
1887 spin_lock_bh(&pmc->mca_lock);
1890 if (!pmc->mca_sfcount[sfmode]) {
1891 spin_unlock_bh(&pmc->mca_lock);
1892 read_unlock_bh(&idev->lock);
1895 pmc->mca_sfcount[sfmode]--;
1898 for (i=0; i<sfcount; i++) {
1899 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1901 changerec |= rv > 0;
1905 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1906 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1907 pmc->mca_sfcount[MCAST_INCLUDE]) {
1908 struct ip6_sf_list *psf;
1910 /* filter mode change */
1911 pmc->mca_sfmode = MCAST_INCLUDE;
1912 pmc->mca_crcount = idev->mc_qrv;
1913 idev->mc_ifc_count = pmc->mca_crcount;
1914 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1915 psf->sf_crcount = 0;
1916 mld_ifc_event(pmc->idev);
1917 } else if (sf_setstate(pmc) || changerec)
1918 mld_ifc_event(pmc->idev);
1919 spin_unlock_bh(&pmc->mca_lock);
1920 read_unlock_bh(&idev->lock);
1925 * Add multicast single-source filter to the interface list
1927 static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
1928 const struct in6_addr *psfsrc, int delta)
1930 struct ip6_sf_list *psf, *psf_prev;
1933 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1934 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1939 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
1943 psf->sf_addr = *psfsrc;
1945 psf_prev->sf_next = psf;
1947 pmc->mca_sources = psf;
1949 psf->sf_count[sfmode]++;
1953 static void sf_markstate(struct ifmcaddr6 *pmc)
1955 struct ip6_sf_list *psf;
1956 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1958 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1959 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1960 psf->sf_oldin = mca_xcount ==
1961 psf->sf_count[MCAST_EXCLUDE] &&
1962 !psf->sf_count[MCAST_INCLUDE];
1964 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
1967 static int sf_setstate(struct ifmcaddr6 *pmc)
1969 struct ip6_sf_list *psf, *dpsf;
1970 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1971 int qrv = pmc->idev->mc_qrv;
1975 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1976 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1977 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
1978 !psf->sf_count[MCAST_INCLUDE];
1980 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
1982 if (!psf->sf_oldin) {
1983 struct ip6_sf_list *prev = NULL;
1985 for (dpsf=pmc->mca_tomb; dpsf;
1986 dpsf=dpsf->sf_next) {
1987 if (ipv6_addr_equal(&dpsf->sf_addr,
1994 prev->sf_next = dpsf->sf_next;
1996 pmc->mca_tomb = dpsf->sf_next;
1999 psf->sf_crcount = qrv;
2002 } else if (psf->sf_oldin) {
2003 psf->sf_crcount = 0;
2005 * add or update "delete" records if an active filter
2008 for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
2009 if (ipv6_addr_equal(&dpsf->sf_addr,
2013 dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
2017 /* pmc->mca_lock held by callers */
2018 dpsf->sf_next = pmc->mca_tomb;
2019 pmc->mca_tomb = dpsf;
2021 dpsf->sf_crcount = qrv;
2029 * Add multicast source filter list to the interface list
2031 static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2032 int sfmode, int sfcount, const struct in6_addr *psfsrc,
2035 struct ifmcaddr6 *pmc;
2041 read_lock_bh(&idev->lock);
2042 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2043 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2047 /* MCA not found?? bug */
2048 read_unlock_bh(&idev->lock);
2051 spin_lock_bh(&pmc->mca_lock);
2054 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2056 pmc->mca_sfcount[sfmode]++;
2058 for (i=0; i<sfcount; i++) {
2059 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
2067 pmc->mca_sfcount[sfmode]--;
2069 ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]);
2070 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
2071 struct ip6_sf_list *psf;
2073 /* filter mode change */
2074 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2075 pmc->mca_sfmode = MCAST_EXCLUDE;
2076 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2077 pmc->mca_sfmode = MCAST_INCLUDE;
2078 /* else no filters; keep old mode for reports */
2080 pmc->mca_crcount = idev->mc_qrv;
2081 idev->mc_ifc_count = pmc->mca_crcount;
2082 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2083 psf->sf_crcount = 0;
2084 mld_ifc_event(idev);
2085 } else if (sf_setstate(pmc))
2086 mld_ifc_event(idev);
2087 spin_unlock_bh(&pmc->mca_lock);
2088 read_unlock_bh(&idev->lock);
2092 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2094 struct ip6_sf_list *psf, *nextpsf;
2096 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
2097 nextpsf = psf->sf_next;
2100 pmc->mca_tomb = NULL;
2101 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
2102 nextpsf = psf->sf_next;
2105 pmc->mca_sources = NULL;
2106 pmc->mca_sfmode = MCAST_EXCLUDE;
2107 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
2108 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2112 static void igmp6_join_group(struct ifmcaddr6 *ma)
2114 unsigned long delay;
2116 if (ma->mca_flags & MAF_NOREPORT)
2119 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2121 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
2123 spin_lock_bh(&ma->mca_lock);
2124 if (del_timer(&ma->mca_timer)) {
2125 atomic_dec(&ma->mca_refcnt);
2126 delay = ma->mca_timer.expires - jiffies;
2129 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2130 atomic_inc(&ma->mca_refcnt);
2131 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2132 spin_unlock_bh(&ma->mca_lock);
2135 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2136 struct inet6_dev *idev)
2140 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2141 * so no other readers or writers of iml or its sflist
2144 /* any-source empty exclude case */
2145 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2147 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2148 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2149 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2154 static void igmp6_leave_group(struct ifmcaddr6 *ma)
2156 if (MLD_V1_SEEN(ma->idev)) {
2157 if (ma->mca_flags & MAF_LAST_REPORTER)
2158 igmp6_send(&ma->mca_addr, ma->idev->dev,
2159 ICMPV6_MGM_REDUCTION);
2161 mld_add_delrec(ma->idev, ma);
2162 mld_ifc_event(ma->idev);
2166 static void mld_gq_timer_expire(unsigned long data)
2168 struct inet6_dev *idev = (struct inet6_dev *)data;
2170 idev->mc_gq_running = 0;
2171 mld_send_report(idev, NULL);
2175 static void mld_ifc_timer_expire(unsigned long data)
2177 struct inet6_dev *idev = (struct inet6_dev *)data;
2180 if (idev->mc_ifc_count) {
2181 idev->mc_ifc_count--;
2182 if (idev->mc_ifc_count)
2183 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2188 static void mld_ifc_event(struct inet6_dev *idev)
2190 if (MLD_V1_SEEN(idev))
2192 idev->mc_ifc_count = idev->mc_qrv;
2193 mld_ifc_start_timer(idev, 1);
2197 static void igmp6_timer_handler(unsigned long data)
2199 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2201 if (MLD_V1_SEEN(ma->idev))
2202 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2204 mld_send_report(ma->idev, ma);
2206 spin_lock(&ma->mca_lock);
2207 ma->mca_flags |= MAF_LAST_REPORTER;
2208 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2209 spin_unlock(&ma->mca_lock);
2213 /* Device changing type */
2215 void ipv6_mc_unmap(struct inet6_dev *idev)
2217 struct ifmcaddr6 *i;
2219 /* Install multicast list, except for all-nodes (already installed) */
2221 read_lock_bh(&idev->lock);
2222 for (i = idev->mc_list; i; i = i->next)
2223 igmp6_group_dropped(i);
2224 read_unlock_bh(&idev->lock);
2227 void ipv6_mc_remap(struct inet6_dev *idev)
2232 /* Device going down */
2234 void ipv6_mc_down(struct inet6_dev *idev)
2236 struct ifmcaddr6 *i;
2238 /* Withdraw multicast list */
2240 read_lock_bh(&idev->lock);
2242 for (i = idev->mc_list; i; i=i->next)
2243 igmp6_group_dropped(i);
2245 /* Should stop timer after group drop. or we will
2246 * start timer again in mld_ifc_event()
2248 idev->mc_ifc_count = 0;
2249 if (del_timer(&idev->mc_ifc_timer))
2250 __in6_dev_put(idev);
2251 idev->mc_gq_running = 0;
2252 if (del_timer(&idev->mc_gq_timer))
2253 __in6_dev_put(idev);
2254 read_unlock_bh(&idev->lock);
2258 /* Device going up */
2260 void ipv6_mc_up(struct inet6_dev *idev)
2262 struct ifmcaddr6 *i;
2264 /* Install multicast list, except for all-nodes (already installed) */
2266 read_lock_bh(&idev->lock);
2267 for (i = idev->mc_list; i; i = i->next) {
2268 mld_del_delrec(idev, i);
2269 igmp6_group_added(i);
2271 read_unlock_bh(&idev->lock);
2274 /* IPv6 device initialization. */
2276 void ipv6_mc_init_dev(struct inet6_dev *idev)
2278 write_lock_bh(&idev->lock);
2279 spin_lock_init(&idev->mc_lock);
2280 idev->mc_gq_running = 0;
2281 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2282 (unsigned long)idev);
2283 idev->mc_tomb = NULL;
2284 idev->mc_ifc_count = 0;
2285 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2286 (unsigned long)idev);
2287 idev->mc_qrv = MLD_QRV_DEFAULT;
2288 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2289 idev->mc_v1_seen = 0;
2290 write_unlock_bh(&idev->lock);
2294 * Device is about to be destroyed: clean up.
2297 void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2299 struct ifmcaddr6 *i;
2301 /* Deactivate timers */
2303 mld_clear_delrec(idev);
2305 /* Delete all-nodes address. */
2306 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2307 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2310 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes);
2312 if (idev->cnf.forwarding)
2313 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters);
2315 write_lock_bh(&idev->lock);
2316 while ((i = idev->mc_list) != NULL) {
2317 idev->mc_list = i->next;
2319 write_unlock_bh(&idev->lock);
2321 write_lock_bh(&idev->lock);
2323 write_unlock_bh(&idev->lock);
2326 #ifdef CONFIG_PROC_FS
2327 struct igmp6_mc_iter_state {
2328 struct seq_net_private p;
2329 struct net_device *dev;
2330 struct inet6_dev *idev;
2333 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2335 static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2337 struct ifmcaddr6 *im = NULL;
2338 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2339 struct net *net = seq_file_net(seq);
2342 for_each_netdev_rcu(net, state->dev) {
2343 struct inet6_dev *idev;
2344 idev = __in6_dev_get(state->dev);
2347 read_lock_bh(&idev->lock);
2353 read_unlock_bh(&idev->lock);
2358 static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2360 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2364 if (likely(state->idev != NULL))
2365 read_unlock_bh(&state->idev->lock);
2367 state->dev = next_net_device_rcu(state->dev);
2372 state->idev = __in6_dev_get(state->dev);
2375 read_lock_bh(&state->idev->lock);
2376 im = state->idev->mc_list;
2381 static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2383 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2385 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2387 return pos ? NULL : im;
2390 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
2394 return igmp6_mc_get_idx(seq, *pos);
2397 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2399 struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v);
2405 static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
2408 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2410 if (likely(state->idev != NULL)) {
2411 read_unlock_bh(&state->idev->lock);
2418 static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2420 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2421 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2424 "%-4d %-15s %pi6 %5d %08X %ld\n",
2425 state->dev->ifindex, state->dev->name,
2427 im->mca_users, im->mca_flags,
2428 (im->mca_flags&MAF_TIMER_RUNNING) ?
2429 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2433 static const struct seq_operations igmp6_mc_seq_ops = {
2434 .start = igmp6_mc_seq_start,
2435 .next = igmp6_mc_seq_next,
2436 .stop = igmp6_mc_seq_stop,
2437 .show = igmp6_mc_seq_show,
2440 static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2442 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2443 sizeof(struct igmp6_mc_iter_state));
2446 static const struct file_operations igmp6_mc_seq_fops = {
2447 .owner = THIS_MODULE,
2448 .open = igmp6_mc_seq_open,
2450 .llseek = seq_lseek,
2451 .release = seq_release_net,
2454 struct igmp6_mcf_iter_state {
2455 struct seq_net_private p;
2456 struct net_device *dev;
2457 struct inet6_dev *idev;
2458 struct ifmcaddr6 *im;
2461 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2463 static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2465 struct ip6_sf_list *psf = NULL;
2466 struct ifmcaddr6 *im = NULL;
2467 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2468 struct net *net = seq_file_net(seq);
2472 for_each_netdev_rcu(net, state->dev) {
2473 struct inet6_dev *idev;
2474 idev = __in6_dev_get(state->dev);
2475 if (unlikely(idev == NULL))
2477 read_lock_bh(&idev->lock);
2479 if (likely(im != NULL)) {
2480 spin_lock_bh(&im->mca_lock);
2481 psf = im->mca_sources;
2482 if (likely(psf != NULL)) {
2487 spin_unlock_bh(&im->mca_lock);
2489 read_unlock_bh(&idev->lock);
2494 static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2496 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2500 spin_unlock_bh(&state->im->mca_lock);
2501 state->im = state->im->next;
2502 while (!state->im) {
2503 if (likely(state->idev != NULL))
2504 read_unlock_bh(&state->idev->lock);
2506 state->dev = next_net_device_rcu(state->dev);
2511 state->idev = __in6_dev_get(state->dev);
2514 read_lock_bh(&state->idev->lock);
2515 state->im = state->idev->mc_list;
2519 spin_lock_bh(&state->im->mca_lock);
2520 psf = state->im->mca_sources;
2526 static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2528 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2530 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2532 return pos ? NULL : psf;
2535 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
2539 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2542 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2544 struct ip6_sf_list *psf;
2545 if (v == SEQ_START_TOKEN)
2546 psf = igmp6_mcf_get_first(seq);
2548 psf = igmp6_mcf_get_next(seq, v);
2553 static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
2556 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2557 if (likely(state->im != NULL)) {
2558 spin_unlock_bh(&state->im->mca_lock);
2561 if (likely(state->idev != NULL)) {
2562 read_unlock_bh(&state->idev->lock);
2569 static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2571 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2572 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2574 if (v == SEQ_START_TOKEN) {
2577 "%32s %32s %6s %6s\n", "Idx",
2578 "Device", "Multicast Address",
2579 "Source Address", "INC", "EXC");
2582 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
2583 state->dev->ifindex, state->dev->name,
2584 &state->im->mca_addr,
2586 psf->sf_count[MCAST_INCLUDE],
2587 psf->sf_count[MCAST_EXCLUDE]);
2592 static const struct seq_operations igmp6_mcf_seq_ops = {
2593 .start = igmp6_mcf_seq_start,
2594 .next = igmp6_mcf_seq_next,
2595 .stop = igmp6_mcf_seq_stop,
2596 .show = igmp6_mcf_seq_show,
2599 static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2601 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2602 sizeof(struct igmp6_mcf_iter_state));
2605 static const struct file_operations igmp6_mcf_seq_fops = {
2606 .owner = THIS_MODULE,
2607 .open = igmp6_mcf_seq_open,
2609 .llseek = seq_lseek,
2610 .release = seq_release_net,
2613 static int __net_init igmp6_proc_init(struct net *net)
2618 if (!proc_net_fops_create(net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops))
2620 if (!proc_net_fops_create(net, "mcfilter6", S_IRUGO,
2621 &igmp6_mcf_seq_fops))
2622 goto out_proc_net_igmp6;
2629 proc_net_remove(net, "igmp6");
2633 static void __net_exit igmp6_proc_exit(struct net *net)
2635 proc_net_remove(net, "mcfilter6");
2636 proc_net_remove(net, "igmp6");
2639 static inline int igmp6_proc_init(struct net *net)
2643 static inline void igmp6_proc_exit(struct net *net)
2648 static int __net_init igmp6_net_init(struct net *net)
2652 err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
2653 SOCK_RAW, IPPROTO_ICMPV6, net);
2656 "Failed to initialize the IGMP6 control socket (err %d).\n",
2661 inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
2663 err = igmp6_proc_init(net);
2665 goto out_sock_create;
2670 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2674 static void __net_exit igmp6_net_exit(struct net *net)
2676 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2677 igmp6_proc_exit(net);
2680 static struct pernet_operations igmp6_net_ops = {
2681 .init = igmp6_net_init,
2682 .exit = igmp6_net_exit,
2685 int __init igmp6_init(void)
2687 return register_pernet_subsys(&igmp6_net_ops);
2690 void igmp6_cleanup(void)
2692 unregister_pernet_subsys(&igmp6_net_ops);