2 * Multicast support for IPv6
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
18 * yoshfuji : fix format of router-alert option
19 * YOSHIFUJI Hideaki @USAGI:
20 * Fixed source address for MLD message based on
21 * <draft-ietf-magma-mld-source-05.txt>.
22 * YOSHIFUJI Hideaki @USAGI:
23 * - Ignore Queries for invalid addresses.
24 * - MLD for link-local addresses.
25 * David L Stevens <dlstevens@us.ibm.com>:
29 #include <linux/module.h>
30 #include <linux/errno.h>
31 #include <linux/types.h>
32 #include <linux/string.h>
33 #include <linux/socket.h>
34 #include <linux/sockios.h>
35 #include <linux/jiffies.h>
36 #include <linux/times.h>
37 #include <linux/net.h>
39 #include <linux/in6.h>
40 #include <linux/netdevice.h>
41 #include <linux/if_arp.h>
42 #include <linux/route.h>
43 #include <linux/init.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.h>
46 #include <linux/slab.h>
47 #include <linux/pkt_sched.h>
50 #include <linux/netfilter.h>
51 #include <linux/netfilter_ipv6.h>
53 #include <net/net_namespace.h>
58 #include <net/protocol.h>
59 #include <net/if_inet6.h>
60 #include <net/ndisc.h>
61 #include <net/addrconf.h>
62 #include <net/ip6_route.h>
63 #include <net/inet_common.h>
65 #include <net/ip6_checksum.h>
67 /* Set to 3 to get tracing... */
71 #define MDBG(x) printk x
76 /* Ensure that we have struct in6_addr aligned on 32bit word. */
77 static void *__mld2_query_bugs[] __attribute__((__unused__)) = {
78 BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4),
79 BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4),
80 BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4)
83 static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
85 /* Big mc list lock for all the sockets */
86 static DEFINE_SPINLOCK(ipv6_sk_mc_lock);
88 static void igmp6_join_group(struct ifmcaddr6 *ma);
89 static void igmp6_leave_group(struct ifmcaddr6 *ma);
90 static void igmp6_timer_handler(unsigned long data);
92 static void mld_gq_timer_expire(unsigned long data);
93 static void mld_ifc_timer_expire(unsigned long data);
94 static void mld_ifc_event(struct inet6_dev *idev);
95 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
96 static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr);
97 static void mld_clear_delrec(struct inet6_dev *idev);
98 static bool mld_in_v1_mode(const struct inet6_dev *idev);
99 static int sf_setstate(struct ifmcaddr6 *pmc);
100 static void sf_markstate(struct ifmcaddr6 *pmc);
101 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
102 static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
103 int sfmode, int sfcount, const struct in6_addr *psfsrc,
105 static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
106 int sfmode, int sfcount, const struct in6_addr *psfsrc,
108 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
109 struct inet6_dev *idev);
111 #define MLD_QRV_DEFAULT 2
112 /* RFC3810, 9.2. Query Interval */
113 #define MLD_QI_DEFAULT (125 * HZ)
114 /* RFC3810, 9.3. Query Response Interval */
115 #define MLD_QRI_DEFAULT (10 * HZ)
117 /* RFC3810, 8.1 Query Version Distinctions */
118 #define MLD_V1_QUERY_LEN 24
119 #define MLD_V2_QUERY_LEN_MIN 28
121 #define IPV6_MLD_MAX_MSF 64
123 int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
126 * socket join on multicast group
129 #define for_each_pmc_rcu(np, pmc) \
130 for (pmc = rcu_dereference(np->ipv6_mc_list); \
132 pmc = rcu_dereference(pmc->next))
134 static int unsolicited_report_interval(struct inet6_dev *idev)
138 if (mld_in_v1_mode(idev))
139 iv = idev->cnf.mldv1_unsolicited_report_interval;
141 iv = idev->cnf.mldv2_unsolicited_report_interval;
143 return iv > 0 ? iv : 1;
146 int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
148 struct net_device *dev = NULL;
149 struct ipv6_mc_socklist *mc_lst;
150 struct ipv6_pinfo *np = inet6_sk(sk);
151 struct net *net = sock_net(sk);
154 if (!ipv6_addr_is_multicast(addr))
158 for_each_pmc_rcu(np, mc_lst) {
159 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
160 ipv6_addr_equal(&mc_lst->addr, addr)) {
167 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
173 mc_lst->addr = *addr;
178 rt = rt6_lookup(net, addr, NULL, 0, 0);
184 dev = dev_get_by_index_rcu(net, ifindex);
188 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
192 mc_lst->ifindex = dev->ifindex;
193 mc_lst->sfmode = MCAST_EXCLUDE;
194 rwlock_init(&mc_lst->sflock);
195 mc_lst->sflist = NULL;
198 * now add/increase the group membership on the device
201 err = ipv6_dev_mc_inc(dev, addr);
205 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
209 spin_lock(&ipv6_sk_mc_lock);
210 mc_lst->next = np->ipv6_mc_list;
211 rcu_assign_pointer(np->ipv6_mc_list, mc_lst);
212 spin_unlock(&ipv6_sk_mc_lock);
220 * socket leave on multicast group
222 int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
224 struct ipv6_pinfo *np = inet6_sk(sk);
225 struct ipv6_mc_socklist *mc_lst;
226 struct ipv6_mc_socklist __rcu **lnk;
227 struct net *net = sock_net(sk);
229 if (!ipv6_addr_is_multicast(addr))
232 spin_lock(&ipv6_sk_mc_lock);
233 for (lnk = &np->ipv6_mc_list;
234 (mc_lst = rcu_dereference_protected(*lnk,
235 lockdep_is_held(&ipv6_sk_mc_lock))) !=NULL ;
236 lnk = &mc_lst->next) {
237 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
238 ipv6_addr_equal(&mc_lst->addr, addr)) {
239 struct net_device *dev;
242 spin_unlock(&ipv6_sk_mc_lock);
245 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
247 struct inet6_dev *idev = __in6_dev_get(dev);
249 (void) ip6_mc_leave_src(sk, mc_lst, idev);
251 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
253 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
255 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
256 kfree_rcu(mc_lst, rcu);
260 spin_unlock(&ipv6_sk_mc_lock);
262 return -EADDRNOTAVAIL;
265 /* called with rcu_read_lock() */
266 static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net,
267 const struct in6_addr *group,
270 struct net_device *dev = NULL;
271 struct inet6_dev *idev = NULL;
274 struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0);
281 dev = dev_get_by_index_rcu(net, ifindex);
285 idev = __in6_dev_get(dev);
288 read_lock_bh(&idev->lock);
290 read_unlock_bh(&idev->lock);
296 void ipv6_sock_mc_close(struct sock *sk)
298 struct ipv6_pinfo *np = inet6_sk(sk);
299 struct ipv6_mc_socklist *mc_lst;
300 struct net *net = sock_net(sk);
302 if (!rcu_access_pointer(np->ipv6_mc_list))
305 spin_lock(&ipv6_sk_mc_lock);
306 while ((mc_lst = rcu_dereference_protected(np->ipv6_mc_list,
307 lockdep_is_held(&ipv6_sk_mc_lock))) != NULL) {
308 struct net_device *dev;
310 np->ipv6_mc_list = mc_lst->next;
311 spin_unlock(&ipv6_sk_mc_lock);
314 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
316 struct inet6_dev *idev = __in6_dev_get(dev);
318 (void) ip6_mc_leave_src(sk, mc_lst, idev);
320 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
322 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
325 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
326 kfree_rcu(mc_lst, rcu);
328 spin_lock(&ipv6_sk_mc_lock);
330 spin_unlock(&ipv6_sk_mc_lock);
333 int ip6_mc_source(int add, int omode, struct sock *sk,
334 struct group_source_req *pgsr)
336 struct in6_addr *source, *group;
337 struct ipv6_mc_socklist *pmc;
338 struct inet6_dev *idev;
339 struct ipv6_pinfo *inet6 = inet6_sk(sk);
340 struct ip6_sf_socklist *psl;
341 struct net *net = sock_net(sk);
347 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
348 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
350 if (!ipv6_addr_is_multicast(group))
354 idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface);
360 err = -EADDRNOTAVAIL;
362 for_each_pmc_rcu(inet6, pmc) {
363 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
365 if (ipv6_addr_equal(&pmc->addr, group))
368 if (!pmc) { /* must have a prior join */
372 /* if a source filter was set, must be the same mode as before */
374 if (pmc->sfmode != omode) {
378 } else if (pmc->sfmode != omode) {
379 /* allow mode switches for empty-set filters */
380 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
381 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
385 write_lock(&pmc->sflock);
391 goto done; /* err = -EADDRNOTAVAIL */
393 for (i=0; i<psl->sl_count; i++) {
394 rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
398 if (rv) /* source not found */
399 goto done; /* err = -EADDRNOTAVAIL */
401 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
402 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
407 /* update the interface filter */
408 ip6_mc_del_src(idev, group, omode, 1, source, 1);
410 for (j=i+1; j<psl->sl_count; j++)
411 psl->sl_addr[j-1] = psl->sl_addr[j];
416 /* else, add a new source to the filter */
418 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
422 if (!psl || psl->sl_count == psl->sl_max) {
423 struct ip6_sf_socklist *newpsl;
424 int count = IP6_SFBLOCK;
427 count += psl->sl_max;
428 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
433 newpsl->sl_max = count;
434 newpsl->sl_count = count - IP6_SFBLOCK;
436 for (i=0; i<psl->sl_count; i++)
437 newpsl->sl_addr[i] = psl->sl_addr[i];
438 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
440 pmc->sflist = psl = newpsl;
442 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
443 for (i=0; i<psl->sl_count; i++) {
444 rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
445 if (rv == 0) /* There is an error in the address. */
448 for (j=psl->sl_count-1; j>=i; j--)
449 psl->sl_addr[j+1] = psl->sl_addr[j];
450 psl->sl_addr[i] = *source;
453 /* update the interface list */
454 ip6_mc_add_src(idev, group, omode, 1, source, 1);
457 write_unlock(&pmc->sflock);
458 read_unlock_bh(&idev->lock);
461 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
465 int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
467 const struct in6_addr *group;
468 struct ipv6_mc_socklist *pmc;
469 struct inet6_dev *idev;
470 struct ipv6_pinfo *inet6 = inet6_sk(sk);
471 struct ip6_sf_socklist *newpsl, *psl;
472 struct net *net = sock_net(sk);
476 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
478 if (!ipv6_addr_is_multicast(group))
480 if (gsf->gf_fmode != MCAST_INCLUDE &&
481 gsf->gf_fmode != MCAST_EXCLUDE)
485 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
494 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
499 for_each_pmc_rcu(inet6, pmc) {
500 if (pmc->ifindex != gsf->gf_interface)
502 if (ipv6_addr_equal(&pmc->addr, group))
505 if (!pmc) { /* must have a prior join */
509 if (gsf->gf_numsrc) {
510 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
516 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
517 for (i=0; i<newpsl->sl_count; ++i) {
518 struct sockaddr_in6 *psin6;
520 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
521 newpsl->sl_addr[i] = psin6->sin6_addr;
523 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
524 newpsl->sl_count, newpsl->sl_addr, 0);
526 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
531 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
534 write_lock(&pmc->sflock);
537 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
538 psl->sl_count, psl->sl_addr, 0);
539 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
541 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
542 pmc->sflist = newpsl;
543 pmc->sfmode = gsf->gf_fmode;
544 write_unlock(&pmc->sflock);
547 read_unlock_bh(&idev->lock);
550 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
554 int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
555 struct group_filter __user *optval, int __user *optlen)
557 int err, i, count, copycount;
558 const struct in6_addr *group;
559 struct ipv6_mc_socklist *pmc;
560 struct inet6_dev *idev;
561 struct ipv6_pinfo *inet6 = inet6_sk(sk);
562 struct ip6_sf_socklist *psl;
563 struct net *net = sock_net(sk);
565 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
567 if (!ipv6_addr_is_multicast(group))
571 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
578 err = -EADDRNOTAVAIL;
580 * changes to the ipv6_mc_list require the socket lock and
581 * a read lock on ip6_sk_mc_lock. We have the socket lock,
582 * so reading the list is safe.
585 for_each_pmc_rcu(inet6, pmc) {
586 if (pmc->ifindex != gsf->gf_interface)
588 if (ipv6_addr_equal(group, &pmc->addr))
591 if (!pmc) /* must have a prior join */
593 gsf->gf_fmode = pmc->sfmode;
595 count = psl ? psl->sl_count : 0;
596 read_unlock_bh(&idev->lock);
599 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
600 gsf->gf_numsrc = count;
601 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
602 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
605 /* changes to psl require the socket lock, a read lock on
606 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
607 * have the socket lock, so reading here is safe.
609 for (i=0; i<copycount; i++) {
610 struct sockaddr_in6 *psin6;
611 struct sockaddr_storage ss;
613 psin6 = (struct sockaddr_in6 *)&ss;
614 memset(&ss, 0, sizeof(ss));
615 psin6->sin6_family = AF_INET6;
616 psin6->sin6_addr = psl->sl_addr[i];
617 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
622 read_unlock_bh(&idev->lock);
627 bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
628 const struct in6_addr *src_addr)
630 struct ipv6_pinfo *np = inet6_sk(sk);
631 struct ipv6_mc_socklist *mc;
632 struct ip6_sf_socklist *psl;
636 for_each_pmc_rcu(np, mc) {
637 if (ipv6_addr_equal(&mc->addr, mc_addr))
644 read_lock(&mc->sflock);
647 rv = mc->sfmode == MCAST_EXCLUDE;
651 for (i=0; i<psl->sl_count; i++) {
652 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
655 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
657 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
660 read_unlock(&mc->sflock);
666 static void ma_put(struct ifmcaddr6 *mc)
668 if (atomic_dec_and_test(&mc->mca_refcnt)) {
669 in6_dev_put(mc->idev);
674 static void igmp6_group_added(struct ifmcaddr6 *mc)
676 struct net_device *dev = mc->idev->dev;
677 char buf[MAX_ADDR_LEN];
679 if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
680 IPV6_ADDR_SCOPE_LINKLOCAL)
683 spin_lock_bh(&mc->mca_lock);
684 if (!(mc->mca_flags&MAF_LOADED)) {
685 mc->mca_flags |= MAF_LOADED;
686 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
687 dev_mc_add(dev, buf);
689 spin_unlock_bh(&mc->mca_lock);
691 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
694 if (mld_in_v1_mode(mc->idev)) {
695 igmp6_join_group(mc);
700 mc->mca_crcount = mc->idev->mc_qrv;
701 mld_ifc_event(mc->idev);
704 static void igmp6_group_dropped(struct ifmcaddr6 *mc)
706 struct net_device *dev = mc->idev->dev;
707 char buf[MAX_ADDR_LEN];
709 if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
710 IPV6_ADDR_SCOPE_LINKLOCAL)
713 spin_lock_bh(&mc->mca_lock);
714 if (mc->mca_flags&MAF_LOADED) {
715 mc->mca_flags &= ~MAF_LOADED;
716 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
717 dev_mc_del(dev, buf);
720 if (mc->mca_flags & MAF_NOREPORT)
722 spin_unlock_bh(&mc->mca_lock);
725 igmp6_leave_group(mc);
727 spin_lock_bh(&mc->mca_lock);
728 if (del_timer(&mc->mca_timer))
729 atomic_dec(&mc->mca_refcnt);
731 ip6_mc_clear_src(mc);
732 spin_unlock_bh(&mc->mca_lock);
736 * deleted ifmcaddr6 manipulation
738 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
740 struct ifmcaddr6 *pmc;
742 /* this is an "ifmcaddr6" for convenience; only the fields below
743 * are actually used. In particular, the refcnt and users are not
744 * used for management of the delete list. Using the same structure
745 * for deleted items allows change reports to use common code with
746 * non-deleted or query-response MCA's.
748 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
752 spin_lock_bh(&im->mca_lock);
753 spin_lock_init(&pmc->mca_lock);
754 pmc->idev = im->idev;
756 pmc->mca_addr = im->mca_addr;
757 pmc->mca_crcount = idev->mc_qrv;
758 pmc->mca_sfmode = im->mca_sfmode;
759 if (pmc->mca_sfmode == MCAST_INCLUDE) {
760 struct ip6_sf_list *psf;
762 pmc->mca_tomb = im->mca_tomb;
763 pmc->mca_sources = im->mca_sources;
764 im->mca_tomb = im->mca_sources = NULL;
765 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
766 psf->sf_crcount = pmc->mca_crcount;
768 spin_unlock_bh(&im->mca_lock);
770 spin_lock_bh(&idev->mc_lock);
771 pmc->next = idev->mc_tomb;
773 spin_unlock_bh(&idev->mc_lock);
776 static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca)
778 struct ifmcaddr6 *pmc, *pmc_prev;
779 struct ip6_sf_list *psf, *psf_next;
781 spin_lock_bh(&idev->mc_lock);
783 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
784 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
790 pmc_prev->next = pmc->next;
792 idev->mc_tomb = pmc->next;
794 spin_unlock_bh(&idev->mc_lock);
797 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
798 psf_next = psf->sf_next;
801 in6_dev_put(pmc->idev);
806 static void mld_clear_delrec(struct inet6_dev *idev)
808 struct ifmcaddr6 *pmc, *nextpmc;
810 spin_lock_bh(&idev->mc_lock);
812 idev->mc_tomb = NULL;
813 spin_unlock_bh(&idev->mc_lock);
815 for (; pmc; pmc = nextpmc) {
817 ip6_mc_clear_src(pmc);
818 in6_dev_put(pmc->idev);
822 /* clear dead sources, too */
823 read_lock_bh(&idev->lock);
824 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
825 struct ip6_sf_list *psf, *psf_next;
827 spin_lock_bh(&pmc->mca_lock);
829 pmc->mca_tomb = NULL;
830 spin_unlock_bh(&pmc->mca_lock);
831 for (; psf; psf=psf_next) {
832 psf_next = psf->sf_next;
836 read_unlock_bh(&idev->lock);
841 * device multicast group inc (add if not found)
843 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
845 struct ifmcaddr6 *mc;
846 struct inet6_dev *idev;
848 /* we need to take a reference on idev */
849 idev = in6_dev_get(dev);
854 write_lock_bh(&idev->lock);
856 write_unlock_bh(&idev->lock);
861 for (mc = idev->mc_list; mc; mc = mc->next) {
862 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
864 write_unlock_bh(&idev->lock);
865 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
873 * not found: create a new one.
876 mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
879 write_unlock_bh(&idev->lock);
884 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
886 mc->mca_addr = *addr;
887 mc->idev = idev; /* (reference taken) */
889 /* mca_stamp should be updated upon changes */
890 mc->mca_cstamp = mc->mca_tstamp = jiffies;
891 atomic_set(&mc->mca_refcnt, 2);
892 spin_lock_init(&mc->mca_lock);
894 /* initial mode is (EX, empty) */
895 mc->mca_sfmode = MCAST_EXCLUDE;
896 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
898 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
899 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
900 mc->mca_flags |= MAF_NOREPORT;
902 mc->next = idev->mc_list;
904 write_unlock_bh(&idev->lock);
906 mld_del_delrec(idev, &mc->mca_addr);
907 igmp6_group_added(mc);
913 * device multicast group del
915 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
917 struct ifmcaddr6 *ma, **map;
919 write_lock_bh(&idev->lock);
920 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
921 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
922 if (--ma->mca_users == 0) {
924 write_unlock_bh(&idev->lock);
926 igmp6_group_dropped(ma);
931 write_unlock_bh(&idev->lock);
935 write_unlock_bh(&idev->lock);
940 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
942 struct inet6_dev *idev;
947 idev = __in6_dev_get(dev);
951 err = __ipv6_dev_mc_dec(idev, addr);
958 * check if the interface/address pair is valid
960 bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
961 const struct in6_addr *src_addr)
963 struct inet6_dev *idev;
964 struct ifmcaddr6 *mc;
968 idev = __in6_dev_get(dev);
970 read_lock_bh(&idev->lock);
971 for (mc = idev->mc_list; mc; mc=mc->next) {
972 if (ipv6_addr_equal(&mc->mca_addr, group))
976 if (src_addr && !ipv6_addr_any(src_addr)) {
977 struct ip6_sf_list *psf;
979 spin_lock_bh(&mc->mca_lock);
980 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
981 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
985 rv = psf->sf_count[MCAST_INCLUDE] ||
986 psf->sf_count[MCAST_EXCLUDE] !=
987 mc->mca_sfcount[MCAST_EXCLUDE];
989 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
990 spin_unlock_bh(&mc->mca_lock);
992 rv = true; /* don't filter unspecified source */
994 read_unlock_bh(&idev->lock);
1000 static void mld_gq_start_timer(struct inet6_dev *idev)
1002 unsigned long tv = net_random() % idev->mc_maxdelay;
1004 idev->mc_gq_running = 1;
1005 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1009 static void mld_ifc_start_timer(struct inet6_dev *idev, unsigned long delay)
1011 unsigned long tv = net_random() % delay;
1013 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1017 static void mld_dad_start_timer(struct inet6_dev *idev, unsigned long delay)
1019 unsigned long tv = net_random() % delay;
1021 if (!mod_timer(&idev->mc_dad_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 bool 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 bool 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 static bool mld_in_v1_mode(const struct inet6_dev *idev)
1117 if (dev_net(idev->dev)->ipv6.devconf_all->force_mld_version == 1)
1119 if (idev->cnf.force_mld_version == 1)
1121 if (idev->mc_v1_seen && time_before(jiffies, idev->mc_v1_seen))
1127 static void mld_set_v1_mode(struct inet6_dev *idev)
1129 /* RFC3810, relevant sections:
1130 * - 9.1. Robustness Variable
1131 * - 9.2. Query Interval
1132 * - 9.3. Query Response Interval
1133 * - 9.12. Older Version Querier Present Timeout
1135 unsigned long switchback;
1137 switchback = (idev->mc_qrv * idev->mc_qi) + idev->mc_qri;
1139 idev->mc_v1_seen = jiffies + switchback;
1142 static void mld_update_qrv(struct inet6_dev *idev,
1143 const struct mld2_query *mlh2)
1145 /* RFC3810, relevant sections:
1146 * - 5.1.8. QRV (Querier's Robustness Variable)
1147 * - 9.1. Robustness Variable
1150 /* The value of the Robustness Variable MUST NOT be zero,
1151 * and SHOULD NOT be one. Catch this here if we ever run
1152 * into such a case in future.
1154 WARN_ON(idev->mc_qrv == 0);
1156 if (mlh2->mld2q_qrv > 0)
1157 idev->mc_qrv = mlh2->mld2q_qrv;
1159 if (unlikely(idev->mc_qrv < 2)) {
1160 net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n",
1161 idev->mc_qrv, MLD_QRV_DEFAULT);
1162 idev->mc_qrv = MLD_QRV_DEFAULT;
1166 static void mld_update_qi(struct inet6_dev *idev,
1167 const struct mld2_query *mlh2)
1169 /* RFC3810, relevant sections:
1170 * - 5.1.9. QQIC (Querier's Query Interval Code)
1171 * - 9.2. Query Interval
1172 * - 9.12. Older Version Querier Present Timeout
1173 * (the [Query Interval] in the last Query received)
1175 unsigned long mc_qqi;
1177 if (mlh2->mld2q_qqic < 128) {
1178 mc_qqi = mlh2->mld2q_qqic;
1180 unsigned long mc_man, mc_exp;
1182 mc_exp = MLDV2_QQIC_EXP(mlh2->mld2q_qqic);
1183 mc_man = MLDV2_QQIC_MAN(mlh2->mld2q_qqic);
1185 mc_qqi = (mc_man | 0x10) << (mc_exp + 3);
1188 idev->mc_qi = mc_qqi * HZ;
1191 static void mld_update_qri(struct inet6_dev *idev,
1192 const struct mld2_query *mlh2)
1194 /* RFC3810, relevant sections:
1195 * - 5.1.3. Maximum Response Code
1196 * - 9.3. Query Response Interval
1198 idev->mc_qri = msecs_to_jiffies(mldv2_mrc(mlh2));
1201 /* called with rcu_read_lock() */
1202 int igmp6_event_query(struct sk_buff *skb)
1204 struct mld2_query *mlh2 = NULL;
1205 struct ifmcaddr6 *ma;
1206 const struct in6_addr *group;
1207 unsigned long max_delay;
1208 struct inet6_dev *idev;
1209 struct mld_msg *mld;
1214 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1217 /* compute payload length excluding extension headers */
1218 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
1219 len -= skb_network_header_len(skb);
1221 /* Drop queries with not link local source */
1222 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
1225 idev = __in6_dev_get(skb->dev);
1230 mld = (struct mld_msg *)icmp6_hdr(skb);
1231 group = &mld->mld_mca;
1232 group_type = ipv6_addr_type(group);
1234 if (group_type != IPV6_ADDR_ANY &&
1235 !(group_type&IPV6_ADDR_MULTICAST))
1238 if (len == MLD_V1_QUERY_LEN) {
1239 /* MLDv1 router present */
1240 max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay));
1242 mld_set_v1_mode(idev);
1244 /* cancel MLDv2 report timer */
1245 idev->mc_gq_running = 0;
1246 if (del_timer(&idev->mc_gq_timer))
1247 __in6_dev_put(idev);
1249 /* cancel the interface change timer */
1250 idev->mc_ifc_count = 0;
1251 if (del_timer(&idev->mc_ifc_timer))
1252 __in6_dev_put(idev);
1253 /* clear deleted report items */
1254 mld_clear_delrec(idev);
1255 } else if (len >= MLD_V2_QUERY_LEN_MIN) {
1256 int srcs_offset = sizeof(struct mld2_query) -
1257 sizeof(struct icmp6hdr);
1259 /* hosts need to stay in MLDv1 mode, discard MLDv2 queries */
1260 if (mld_in_v1_mode(idev))
1262 if (!pskb_may_pull(skb, srcs_offset))
1265 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1267 max_delay = max(msecs_to_jiffies(mldv2_mrc(mlh2)), 1UL);
1268 idev->mc_maxdelay = max_delay;
1270 mld_update_qrv(idev, mlh2);
1271 mld_update_qi(idev, mlh2);
1272 mld_update_qri(idev, mlh2);
1274 if (group_type == IPV6_ADDR_ANY) { /* general query */
1275 if (mlh2->mld2q_nsrcs)
1276 return -EINVAL; /* no sources allowed */
1278 mld_gq_start_timer(idev);
1281 /* mark sources to include, if group & source-specific */
1282 if (mlh2->mld2q_nsrcs != 0) {
1283 if (!pskb_may_pull(skb, srcs_offset +
1284 ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr)))
1287 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1293 read_lock_bh(&idev->lock);
1294 if (group_type == IPV6_ADDR_ANY) {
1295 for (ma = idev->mc_list; ma; ma=ma->next) {
1296 spin_lock_bh(&ma->mca_lock);
1297 igmp6_group_queried(ma, max_delay);
1298 spin_unlock_bh(&ma->mca_lock);
1301 for (ma = idev->mc_list; ma; ma=ma->next) {
1302 if (!ipv6_addr_equal(group, &ma->mca_addr))
1304 spin_lock_bh(&ma->mca_lock);
1305 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1306 /* gsquery <- gsquery && mark */
1308 ma->mca_flags &= ~MAF_GSQUERY;
1310 /* gsquery <- mark */
1312 ma->mca_flags |= MAF_GSQUERY;
1314 ma->mca_flags &= ~MAF_GSQUERY;
1316 if (!(ma->mca_flags & MAF_GSQUERY) ||
1317 mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs))
1318 igmp6_group_queried(ma, max_delay);
1319 spin_unlock_bh(&ma->mca_lock);
1323 read_unlock_bh(&idev->lock);
1328 /* called with rcu_read_lock() */
1329 int igmp6_event_report(struct sk_buff *skb)
1331 struct ifmcaddr6 *ma;
1332 struct inet6_dev *idev;
1333 struct mld_msg *mld;
1336 /* Our own report looped back. Ignore it. */
1337 if (skb->pkt_type == PACKET_LOOPBACK)
1340 /* send our report if the MC router may not have heard this report */
1341 if (skb->pkt_type != PACKET_MULTICAST &&
1342 skb->pkt_type != PACKET_BROADCAST)
1345 if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr)))
1348 mld = (struct mld_msg *)icmp6_hdr(skb);
1350 /* Drop reports with not link local source */
1351 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
1352 if (addr_type != IPV6_ADDR_ANY &&
1353 !(addr_type&IPV6_ADDR_LINKLOCAL))
1356 idev = __in6_dev_get(skb->dev);
1361 * Cancel the timer for this group
1364 read_lock_bh(&idev->lock);
1365 for (ma = idev->mc_list; ma; ma=ma->next) {
1366 if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) {
1367 spin_lock(&ma->mca_lock);
1368 if (del_timer(&ma->mca_timer))
1369 atomic_dec(&ma->mca_refcnt);
1370 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1371 spin_unlock(&ma->mca_lock);
1375 read_unlock_bh(&idev->lock);
1379 static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1380 int gdeleted, int sdeleted)
1383 case MLD2_MODE_IS_INCLUDE:
1384 case MLD2_MODE_IS_EXCLUDE:
1385 if (gdeleted || sdeleted)
1387 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1388 if (pmc->mca_sfmode == MCAST_INCLUDE)
1390 /* don't include if this source is excluded
1393 if (psf->sf_count[MCAST_INCLUDE])
1394 return type == MLD2_MODE_IS_INCLUDE;
1395 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1396 psf->sf_count[MCAST_EXCLUDE];
1399 case MLD2_CHANGE_TO_INCLUDE:
1400 if (gdeleted || sdeleted)
1402 return psf->sf_count[MCAST_INCLUDE] != 0;
1403 case MLD2_CHANGE_TO_EXCLUDE:
1404 if (gdeleted || sdeleted)
1406 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1407 psf->sf_count[MCAST_INCLUDE])
1409 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1410 psf->sf_count[MCAST_EXCLUDE];
1411 case MLD2_ALLOW_NEW_SOURCES:
1412 if (gdeleted || !psf->sf_crcount)
1414 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1415 case MLD2_BLOCK_OLD_SOURCES:
1416 if (pmc->mca_sfmode == MCAST_INCLUDE)
1417 return gdeleted || (psf->sf_crcount && sdeleted);
1418 return psf->sf_crcount && !gdeleted && !sdeleted;
1424 mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1426 struct ip6_sf_list *psf;
1429 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1430 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1437 static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb,
1438 struct net_device *dev,
1439 const struct in6_addr *saddr,
1440 const struct in6_addr *daddr,
1443 struct ipv6hdr *hdr;
1445 skb->protocol = htons(ETH_P_IPV6);
1448 skb_reset_network_header(skb);
1449 skb_put(skb, sizeof(struct ipv6hdr));
1450 hdr = ipv6_hdr(skb);
1452 ip6_flow_hdr(hdr, 0, 0);
1454 hdr->payload_len = htons(len);
1455 hdr->nexthdr = proto;
1456 hdr->hop_limit = inet6_sk(sk)->hop_limit;
1458 hdr->saddr = *saddr;
1459 hdr->daddr = *daddr;
1462 static struct sk_buff *mld_newpack(struct inet6_dev *idev, int size)
1464 struct net_device *dev = idev->dev;
1465 struct net *net = dev_net(dev);
1466 struct sock *sk = net->ipv6.igmp_sk;
1467 struct sk_buff *skb;
1468 struct mld2_report *pmr;
1469 struct in6_addr addr_buf;
1470 const struct in6_addr *saddr;
1471 int hlen = LL_RESERVED_SPACE(dev);
1472 int tlen = dev->needed_tailroom;
1474 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1475 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1478 /* we assume size > sizeof(ra) here */
1479 size += hlen + tlen;
1480 /* limit our allocations to order-0 page */
1481 size = min_t(int, size, SKB_MAX_ORDER(0, 0));
1482 skb = sock_alloc_send_skb(sk, size, 1, &err);
1487 skb->priority = TC_PRIO_CONTROL;
1488 skb_reserve(skb, hlen);
1490 if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) {
1491 /* <draft-ietf-magma-mld-source-05.txt>:
1492 * use unspecified address as the source address
1493 * when a valid link-local address is not available.
1495 saddr = &in6addr_any;
1499 ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0);
1501 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1503 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
1504 skb_put(skb, sizeof(*pmr));
1505 pmr = (struct mld2_report *)skb_transport_header(skb);
1506 pmr->mld2r_type = ICMPV6_MLD2_REPORT;
1507 pmr->mld2r_resv1 = 0;
1508 pmr->mld2r_cksum = 0;
1509 pmr->mld2r_resv2 = 0;
1510 pmr->mld2r_ngrec = 0;
1514 static void mld_sendpack(struct sk_buff *skb)
1516 struct ipv6hdr *pip6 = ipv6_hdr(skb);
1517 struct mld2_report *pmr =
1518 (struct mld2_report *)skb_transport_header(skb);
1519 int payload_len, mldlen;
1520 struct inet6_dev *idev;
1521 struct net *net = dev_net(skb->dev);
1524 struct dst_entry *dst;
1527 idev = __in6_dev_get(skb->dev);
1528 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
1530 payload_len = (skb_tail_pointer(skb) - skb_network_header(skb)) -
1532 mldlen = skb_tail_pointer(skb) - skb_transport_header(skb);
1533 pip6->payload_len = htons(payload_len);
1535 pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1537 csum_partial(skb_transport_header(skb),
1540 icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT,
1541 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1543 dst = icmp6_dst_alloc(skb->dev, &fl6);
1550 skb_dst_set(skb, dst);
1554 payload_len = skb->len;
1556 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1560 ICMP6MSGOUT_INC_STATS_BH(net, idev, ICMPV6_MLD2_REPORT);
1561 ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS);
1562 IP6_UPD_PO_STATS_BH(net, idev, IPSTATS_MIB_OUTMCAST, payload_len);
1564 IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_OUTDISCARDS);
1574 static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1576 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
1579 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1580 int type, struct mld2_grec **ppgr)
1582 struct net_device *dev = pmc->idev->dev;
1583 struct mld2_report *pmr;
1584 struct mld2_grec *pgr;
1587 skb = mld_newpack(pmc->idev, dev->mtu);
1590 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1591 pgr->grec_type = type;
1592 pgr->grec_auxwords = 0;
1593 pgr->grec_nsrcs = 0;
1594 pgr->grec_mca = pmc->mca_addr; /* structure copy */
1595 pmr = (struct mld2_report *)skb_transport_header(skb);
1596 pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1);
1601 #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1602 skb_tailroom(skb)) : 0)
1604 static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1605 int type, int gdeleted, int sdeleted)
1607 struct inet6_dev *idev = pmc->idev;
1608 struct net_device *dev = idev->dev;
1609 struct mld2_report *pmr;
1610 struct mld2_grec *pgr = NULL;
1611 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
1612 int scount, stotal, first, isquery, truncate;
1614 if (pmc->mca_flags & MAF_NOREPORT)
1617 isquery = type == MLD2_MODE_IS_INCLUDE ||
1618 type == MLD2_MODE_IS_EXCLUDE;
1619 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1620 type == MLD2_CHANGE_TO_EXCLUDE;
1622 stotal = scount = 0;
1624 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1629 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
1631 /* EX and TO_EX get a fresh packet, if needed */
1633 if (pmr && pmr->mld2r_ngrec &&
1634 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1637 skb = mld_newpack(idev, dev->mtu);
1642 for (psf=*psf_list; psf; psf=psf_next) {
1643 struct in6_addr *psrc;
1645 psf_next = psf->sf_next;
1647 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1652 /* clear marks on query responses */
1656 if (AVAILABLE(skb) < sizeof(*psrc) +
1657 first*sizeof(struct mld2_grec)) {
1658 if (truncate && !first)
1659 break; /* truncate these */
1661 pgr->grec_nsrcs = htons(scount);
1664 skb = mld_newpack(idev, dev->mtu);
1669 skb = add_grhead(skb, pmc, type, &pgr);
1674 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1675 *psrc = psf->sf_addr;
1677 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1678 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1680 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1682 psf_prev->sf_next = psf->sf_next;
1684 *psf_list = psf->sf_next;
1694 if (type == MLD2_ALLOW_NEW_SOURCES ||
1695 type == MLD2_BLOCK_OLD_SOURCES)
1697 if (pmc->mca_crcount || isquery) {
1698 /* make sure we have room for group header */
1699 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1701 skb = NULL; /* add_grhead will get a new one */
1703 skb = add_grhead(skb, pmc, type, &pgr);
1707 pgr->grec_nsrcs = htons(scount);
1710 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1714 static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1716 struct sk_buff *skb = NULL;
1719 read_lock_bh(&idev->lock);
1721 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1722 if (pmc->mca_flags & MAF_NOREPORT)
1724 spin_lock_bh(&pmc->mca_lock);
1725 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1726 type = MLD2_MODE_IS_EXCLUDE;
1728 type = MLD2_MODE_IS_INCLUDE;
1729 skb = add_grec(skb, pmc, type, 0, 0);
1730 spin_unlock_bh(&pmc->mca_lock);
1733 spin_lock_bh(&pmc->mca_lock);
1734 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1735 type = MLD2_MODE_IS_EXCLUDE;
1737 type = MLD2_MODE_IS_INCLUDE;
1738 skb = add_grec(skb, pmc, type, 0, 0);
1739 spin_unlock_bh(&pmc->mca_lock);
1741 read_unlock_bh(&idev->lock);
1747 * remove zero-count source records from a source filter list
1749 static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1751 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1754 for (psf=*ppsf; psf; psf = psf_next) {
1755 psf_next = psf->sf_next;
1756 if (psf->sf_crcount == 0) {
1758 psf_prev->sf_next = psf->sf_next;
1760 *ppsf = psf->sf_next;
1767 static void mld_send_cr(struct inet6_dev *idev)
1769 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1770 struct sk_buff *skb = NULL;
1773 read_lock_bh(&idev->lock);
1774 spin_lock(&idev->mc_lock);
1778 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1779 pmc_next = pmc->next;
1780 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1781 type = MLD2_BLOCK_OLD_SOURCES;
1782 dtype = MLD2_BLOCK_OLD_SOURCES;
1783 skb = add_grec(skb, pmc, type, 1, 0);
1784 skb = add_grec(skb, pmc, dtype, 1, 1);
1786 if (pmc->mca_crcount) {
1787 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1788 type = MLD2_CHANGE_TO_INCLUDE;
1789 skb = add_grec(skb, pmc, type, 1, 0);
1792 if (pmc->mca_crcount == 0) {
1793 mld_clear_zeros(&pmc->mca_tomb);
1794 mld_clear_zeros(&pmc->mca_sources);
1797 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1798 !pmc->mca_sources) {
1800 pmc_prev->next = pmc_next;
1802 idev->mc_tomb = pmc_next;
1803 in6_dev_put(pmc->idev);
1808 spin_unlock(&idev->mc_lock);
1811 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1812 spin_lock_bh(&pmc->mca_lock);
1813 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1814 type = MLD2_BLOCK_OLD_SOURCES;
1815 dtype = MLD2_ALLOW_NEW_SOURCES;
1817 type = MLD2_ALLOW_NEW_SOURCES;
1818 dtype = MLD2_BLOCK_OLD_SOURCES;
1820 skb = add_grec(skb, pmc, type, 0, 0);
1821 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1823 /* filter mode changes */
1824 if (pmc->mca_crcount) {
1825 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1826 type = MLD2_CHANGE_TO_EXCLUDE;
1828 type = MLD2_CHANGE_TO_INCLUDE;
1829 skb = add_grec(skb, pmc, type, 0, 0);
1832 spin_unlock_bh(&pmc->mca_lock);
1834 read_unlock_bh(&idev->lock);
1837 (void) mld_sendpack(skb);
1840 static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1842 struct net *net = dev_net(dev);
1843 struct sock *sk = net->ipv6.igmp_sk;
1844 struct inet6_dev *idev;
1845 struct sk_buff *skb;
1846 struct mld_msg *hdr;
1847 const struct in6_addr *snd_addr, *saddr;
1848 struct in6_addr addr_buf;
1849 int hlen = LL_RESERVED_SPACE(dev);
1850 int tlen = dev->needed_tailroom;
1851 int err, len, payload_len, full_len;
1852 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1853 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1856 struct dst_entry *dst;
1858 if (type == ICMPV6_MGM_REDUCTION)
1859 snd_addr = &in6addr_linklocal_allrouters;
1863 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1864 payload_len = len + sizeof(ra);
1865 full_len = sizeof(struct ipv6hdr) + payload_len;
1868 IP6_UPD_PO_STATS(net, __in6_dev_get(dev),
1869 IPSTATS_MIB_OUT, full_len);
1872 skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err);
1876 IP6_INC_STATS(net, __in6_dev_get(dev),
1877 IPSTATS_MIB_OUTDISCARDS);
1881 skb->priority = TC_PRIO_CONTROL;
1882 skb_reserve(skb, hlen);
1884 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1885 /* <draft-ietf-magma-mld-source-05.txt>:
1886 * use unspecified address as the source address
1887 * when a valid link-local address is not available.
1889 saddr = &in6addr_any;
1893 ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len);
1895 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1897 hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg));
1898 memset(hdr, 0, sizeof(struct mld_msg));
1899 hdr->mld_type = type;
1900 hdr->mld_mca = *addr;
1902 hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len,
1904 csum_partial(hdr, len, 0));
1907 idev = __in6_dev_get(skb->dev);
1909 icmpv6_flow_init(sk, &fl6, type,
1910 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1912 dst = icmp6_dst_alloc(skb->dev, &fl6);
1918 skb_dst_set(skb, dst);
1919 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1923 ICMP6MSGOUT_INC_STATS(net, idev, type);
1924 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
1925 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len);
1927 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
1937 static void mld_resend_report(struct inet6_dev *idev)
1939 if (mld_in_v1_mode(idev)) {
1940 struct ifmcaddr6 *mcaddr;
1941 read_lock_bh(&idev->lock);
1942 for (mcaddr = idev->mc_list; mcaddr; mcaddr = mcaddr->next) {
1943 if (!(mcaddr->mca_flags & MAF_NOREPORT))
1944 igmp6_send(&mcaddr->mca_addr, idev->dev,
1947 read_unlock_bh(&idev->lock);
1949 mld_send_report(idev, NULL);
1953 void ipv6_mc_dad_complete(struct inet6_dev *idev)
1955 idev->mc_dad_count = idev->mc_qrv;
1956 if (idev->mc_dad_count) {
1957 mld_resend_report(idev);
1958 idev->mc_dad_count--;
1959 if (idev->mc_dad_count)
1960 mld_dad_start_timer(idev, idev->mc_maxdelay);
1964 static void mld_dad_timer_expire(unsigned long data)
1966 struct inet6_dev *idev = (struct inet6_dev *)data;
1968 mld_resend_report(idev);
1969 if (idev->mc_dad_count) {
1970 idev->mc_dad_count--;
1971 if (idev->mc_dad_count)
1972 mld_dad_start_timer(idev, idev->mc_maxdelay);
1974 __in6_dev_put(idev);
1977 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
1978 const struct in6_addr *psfsrc)
1980 struct ip6_sf_list *psf, *psf_prev;
1984 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1985 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1989 if (!psf || psf->sf_count[sfmode] == 0) {
1990 /* source filter not found, or count wrong => bug */
1993 psf->sf_count[sfmode]--;
1994 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1995 struct inet6_dev *idev = pmc->idev;
1997 /* no more filters for this source */
1999 psf_prev->sf_next = psf->sf_next;
2001 pmc->mca_sources = psf->sf_next;
2002 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
2003 !mld_in_v1_mode(idev)) {
2004 psf->sf_crcount = idev->mc_qrv;
2005 psf->sf_next = pmc->mca_tomb;
2006 pmc->mca_tomb = psf;
2014 static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2015 int sfmode, int sfcount, const struct in6_addr *psfsrc,
2018 struct ifmcaddr6 *pmc;
2024 read_lock_bh(&idev->lock);
2025 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2026 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2030 /* MCA not found?? bug */
2031 read_unlock_bh(&idev->lock);
2034 spin_lock_bh(&pmc->mca_lock);
2037 if (!pmc->mca_sfcount[sfmode]) {
2038 spin_unlock_bh(&pmc->mca_lock);
2039 read_unlock_bh(&idev->lock);
2042 pmc->mca_sfcount[sfmode]--;
2045 for (i=0; i<sfcount; i++) {
2046 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
2048 changerec |= rv > 0;
2052 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
2053 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
2054 pmc->mca_sfcount[MCAST_INCLUDE]) {
2055 struct ip6_sf_list *psf;
2057 /* filter mode change */
2058 pmc->mca_sfmode = MCAST_INCLUDE;
2059 pmc->mca_crcount = idev->mc_qrv;
2060 idev->mc_ifc_count = pmc->mca_crcount;
2061 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2062 psf->sf_crcount = 0;
2063 mld_ifc_event(pmc->idev);
2064 } else if (sf_setstate(pmc) || changerec)
2065 mld_ifc_event(pmc->idev);
2066 spin_unlock_bh(&pmc->mca_lock);
2067 read_unlock_bh(&idev->lock);
2072 * Add multicast single-source filter to the interface list
2074 static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
2075 const struct in6_addr *psfsrc)
2077 struct ip6_sf_list *psf, *psf_prev;
2080 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
2081 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
2086 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
2090 psf->sf_addr = *psfsrc;
2092 psf_prev->sf_next = psf;
2094 pmc->mca_sources = psf;
2096 psf->sf_count[sfmode]++;
2100 static void sf_markstate(struct ifmcaddr6 *pmc)
2102 struct ip6_sf_list *psf;
2103 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
2105 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
2106 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
2107 psf->sf_oldin = mca_xcount ==
2108 psf->sf_count[MCAST_EXCLUDE] &&
2109 !psf->sf_count[MCAST_INCLUDE];
2111 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
2114 static int sf_setstate(struct ifmcaddr6 *pmc)
2116 struct ip6_sf_list *psf, *dpsf;
2117 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
2118 int qrv = pmc->idev->mc_qrv;
2122 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
2123 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
2124 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
2125 !psf->sf_count[MCAST_INCLUDE];
2127 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
2129 if (!psf->sf_oldin) {
2130 struct ip6_sf_list *prev = NULL;
2132 for (dpsf=pmc->mca_tomb; dpsf;
2133 dpsf=dpsf->sf_next) {
2134 if (ipv6_addr_equal(&dpsf->sf_addr,
2141 prev->sf_next = dpsf->sf_next;
2143 pmc->mca_tomb = dpsf->sf_next;
2146 psf->sf_crcount = qrv;
2149 } else if (psf->sf_oldin) {
2150 psf->sf_crcount = 0;
2152 * add or update "delete" records if an active filter
2155 for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
2156 if (ipv6_addr_equal(&dpsf->sf_addr,
2160 dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
2164 /* pmc->mca_lock held by callers */
2165 dpsf->sf_next = pmc->mca_tomb;
2166 pmc->mca_tomb = dpsf;
2168 dpsf->sf_crcount = qrv;
2176 * Add multicast source filter list to the interface list
2178 static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2179 int sfmode, int sfcount, const struct in6_addr *psfsrc,
2182 struct ifmcaddr6 *pmc;
2188 read_lock_bh(&idev->lock);
2189 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2190 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2194 /* MCA not found?? bug */
2195 read_unlock_bh(&idev->lock);
2198 spin_lock_bh(&pmc->mca_lock);
2201 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2203 pmc->mca_sfcount[sfmode]++;
2205 for (i=0; i<sfcount; i++) {
2206 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]);
2214 pmc->mca_sfcount[sfmode]--;
2216 ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]);
2217 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
2218 struct ip6_sf_list *psf;
2220 /* filter mode change */
2221 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2222 pmc->mca_sfmode = MCAST_EXCLUDE;
2223 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2224 pmc->mca_sfmode = MCAST_INCLUDE;
2225 /* else no filters; keep old mode for reports */
2227 pmc->mca_crcount = idev->mc_qrv;
2228 idev->mc_ifc_count = pmc->mca_crcount;
2229 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2230 psf->sf_crcount = 0;
2231 mld_ifc_event(idev);
2232 } else if (sf_setstate(pmc))
2233 mld_ifc_event(idev);
2234 spin_unlock_bh(&pmc->mca_lock);
2235 read_unlock_bh(&idev->lock);
2239 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2241 struct ip6_sf_list *psf, *nextpsf;
2243 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
2244 nextpsf = psf->sf_next;
2247 pmc->mca_tomb = NULL;
2248 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
2249 nextpsf = psf->sf_next;
2252 pmc->mca_sources = NULL;
2253 pmc->mca_sfmode = MCAST_EXCLUDE;
2254 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
2255 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2259 static void igmp6_join_group(struct ifmcaddr6 *ma)
2261 unsigned long delay;
2263 if (ma->mca_flags & MAF_NOREPORT)
2266 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2268 delay = net_random() % unsolicited_report_interval(ma->idev);
2270 spin_lock_bh(&ma->mca_lock);
2271 if (del_timer(&ma->mca_timer)) {
2272 atomic_dec(&ma->mca_refcnt);
2273 delay = ma->mca_timer.expires - jiffies;
2276 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2277 atomic_inc(&ma->mca_refcnt);
2278 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2279 spin_unlock_bh(&ma->mca_lock);
2282 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2283 struct inet6_dev *idev)
2287 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2288 * so no other readers or writers of iml or its sflist
2291 /* any-source empty exclude case */
2292 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2294 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2295 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2296 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2301 static void igmp6_leave_group(struct ifmcaddr6 *ma)
2303 if (mld_in_v1_mode(ma->idev)) {
2304 if (ma->mca_flags & MAF_LAST_REPORTER)
2305 igmp6_send(&ma->mca_addr, ma->idev->dev,
2306 ICMPV6_MGM_REDUCTION);
2308 mld_add_delrec(ma->idev, ma);
2309 mld_ifc_event(ma->idev);
2313 static void mld_gq_timer_expire(unsigned long data)
2315 struct inet6_dev *idev = (struct inet6_dev *)data;
2317 idev->mc_gq_running = 0;
2318 mld_send_report(idev, NULL);
2319 __in6_dev_put(idev);
2322 static void mld_ifc_timer_expire(unsigned long data)
2324 struct inet6_dev *idev = (struct inet6_dev *)data;
2327 if (idev->mc_ifc_count) {
2328 idev->mc_ifc_count--;
2329 if (idev->mc_ifc_count)
2330 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2332 __in6_dev_put(idev);
2335 static void mld_ifc_event(struct inet6_dev *idev)
2337 if (mld_in_v1_mode(idev))
2339 idev->mc_ifc_count = idev->mc_qrv;
2340 mld_ifc_start_timer(idev, 1);
2344 static void igmp6_timer_handler(unsigned long data)
2346 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2348 if (mld_in_v1_mode(ma->idev))
2349 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2351 mld_send_report(ma->idev, ma);
2353 spin_lock(&ma->mca_lock);
2354 ma->mca_flags |= MAF_LAST_REPORTER;
2355 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2356 spin_unlock(&ma->mca_lock);
2360 /* Device changing type */
2362 void ipv6_mc_unmap(struct inet6_dev *idev)
2364 struct ifmcaddr6 *i;
2366 /* Install multicast list, except for all-nodes (already installed) */
2368 read_lock_bh(&idev->lock);
2369 for (i = idev->mc_list; i; i = i->next)
2370 igmp6_group_dropped(i);
2371 read_unlock_bh(&idev->lock);
2374 void ipv6_mc_remap(struct inet6_dev *idev)
2379 /* Device going down */
2381 void ipv6_mc_down(struct inet6_dev *idev)
2383 struct ifmcaddr6 *i;
2385 /* Withdraw multicast list */
2387 read_lock_bh(&idev->lock);
2388 idev->mc_ifc_count = 0;
2389 if (del_timer(&idev->mc_ifc_timer))
2390 __in6_dev_put(idev);
2391 idev->mc_gq_running = 0;
2392 if (del_timer(&idev->mc_gq_timer))
2393 __in6_dev_put(idev);
2394 if (del_timer(&idev->mc_dad_timer))
2395 __in6_dev_put(idev);
2397 for (i = idev->mc_list; i; i=i->next)
2398 igmp6_group_dropped(i);
2399 read_unlock_bh(&idev->lock);
2401 mld_clear_delrec(idev);
2405 /* Device going up */
2407 void ipv6_mc_up(struct inet6_dev *idev)
2409 struct ifmcaddr6 *i;
2411 /* Install multicast list, except for all-nodes (already installed) */
2413 read_lock_bh(&idev->lock);
2414 for (i = idev->mc_list; i; i=i->next)
2415 igmp6_group_added(i);
2416 read_unlock_bh(&idev->lock);
2419 /* IPv6 device initialization. */
2421 void ipv6_mc_init_dev(struct inet6_dev *idev)
2423 write_lock_bh(&idev->lock);
2424 spin_lock_init(&idev->mc_lock);
2425 idev->mc_gq_running = 0;
2426 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2427 (unsigned long)idev);
2428 idev->mc_tomb = NULL;
2429 idev->mc_ifc_count = 0;
2430 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2431 (unsigned long)idev);
2432 setup_timer(&idev->mc_dad_timer, mld_dad_timer_expire,
2433 (unsigned long)idev);
2435 idev->mc_qrv = MLD_QRV_DEFAULT;
2436 idev->mc_qi = MLD_QI_DEFAULT;
2437 idev->mc_qri = MLD_QRI_DEFAULT;
2439 idev->mc_maxdelay = unsolicited_report_interval(idev);
2440 idev->mc_v1_seen = 0;
2441 write_unlock_bh(&idev->lock);
2445 * Device is about to be destroyed: clean up.
2448 void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2450 struct ifmcaddr6 *i;
2452 /* Deactivate timers */
2455 /* Delete all-nodes address. */
2456 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2457 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2460 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes);
2462 if (idev->cnf.forwarding)
2463 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters);
2465 write_lock_bh(&idev->lock);
2466 while ((i = idev->mc_list) != NULL) {
2467 idev->mc_list = i->next;
2468 write_unlock_bh(&idev->lock);
2470 igmp6_group_dropped(i);
2473 write_lock_bh(&idev->lock);
2475 write_unlock_bh(&idev->lock);
2478 #ifdef CONFIG_PROC_FS
2479 struct igmp6_mc_iter_state {
2480 struct seq_net_private p;
2481 struct net_device *dev;
2482 struct inet6_dev *idev;
2485 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2487 static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2489 struct ifmcaddr6 *im = NULL;
2490 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2491 struct net *net = seq_file_net(seq);
2494 for_each_netdev_rcu(net, state->dev) {
2495 struct inet6_dev *idev;
2496 idev = __in6_dev_get(state->dev);
2499 read_lock_bh(&idev->lock);
2505 read_unlock_bh(&idev->lock);
2510 static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2512 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2516 if (likely(state->idev != NULL))
2517 read_unlock_bh(&state->idev->lock);
2519 state->dev = next_net_device_rcu(state->dev);
2524 state->idev = __in6_dev_get(state->dev);
2527 read_lock_bh(&state->idev->lock);
2528 im = state->idev->mc_list;
2533 static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2535 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2537 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2539 return pos ? NULL : im;
2542 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
2546 return igmp6_mc_get_idx(seq, *pos);
2549 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2551 struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v);
2557 static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
2560 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2562 if (likely(state->idev != NULL)) {
2563 read_unlock_bh(&state->idev->lock);
2570 static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2572 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2573 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2576 "%-4d %-15s %pi6 %5d %08X %ld\n",
2577 state->dev->ifindex, state->dev->name,
2579 im->mca_users, im->mca_flags,
2580 (im->mca_flags&MAF_TIMER_RUNNING) ?
2581 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2585 static const struct seq_operations igmp6_mc_seq_ops = {
2586 .start = igmp6_mc_seq_start,
2587 .next = igmp6_mc_seq_next,
2588 .stop = igmp6_mc_seq_stop,
2589 .show = igmp6_mc_seq_show,
2592 static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2594 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2595 sizeof(struct igmp6_mc_iter_state));
2598 static const struct file_operations igmp6_mc_seq_fops = {
2599 .owner = THIS_MODULE,
2600 .open = igmp6_mc_seq_open,
2602 .llseek = seq_lseek,
2603 .release = seq_release_net,
2606 struct igmp6_mcf_iter_state {
2607 struct seq_net_private p;
2608 struct net_device *dev;
2609 struct inet6_dev *idev;
2610 struct ifmcaddr6 *im;
2613 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2615 static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2617 struct ip6_sf_list *psf = NULL;
2618 struct ifmcaddr6 *im = NULL;
2619 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2620 struct net *net = seq_file_net(seq);
2624 for_each_netdev_rcu(net, state->dev) {
2625 struct inet6_dev *idev;
2626 idev = __in6_dev_get(state->dev);
2627 if (unlikely(idev == NULL))
2629 read_lock_bh(&idev->lock);
2631 if (likely(im != NULL)) {
2632 spin_lock_bh(&im->mca_lock);
2633 psf = im->mca_sources;
2634 if (likely(psf != NULL)) {
2639 spin_unlock_bh(&im->mca_lock);
2641 read_unlock_bh(&idev->lock);
2646 static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2648 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2652 spin_unlock_bh(&state->im->mca_lock);
2653 state->im = state->im->next;
2654 while (!state->im) {
2655 if (likely(state->idev != NULL))
2656 read_unlock_bh(&state->idev->lock);
2658 state->dev = next_net_device_rcu(state->dev);
2663 state->idev = __in6_dev_get(state->dev);
2666 read_lock_bh(&state->idev->lock);
2667 state->im = state->idev->mc_list;
2671 spin_lock_bh(&state->im->mca_lock);
2672 psf = state->im->mca_sources;
2678 static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2680 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2682 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2684 return pos ? NULL : psf;
2687 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
2691 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2694 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2696 struct ip6_sf_list *psf;
2697 if (v == SEQ_START_TOKEN)
2698 psf = igmp6_mcf_get_first(seq);
2700 psf = igmp6_mcf_get_next(seq, v);
2705 static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
2708 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2709 if (likely(state->im != NULL)) {
2710 spin_unlock_bh(&state->im->mca_lock);
2713 if (likely(state->idev != NULL)) {
2714 read_unlock_bh(&state->idev->lock);
2721 static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2723 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2724 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2726 if (v == SEQ_START_TOKEN) {
2729 "%32s %32s %6s %6s\n", "Idx",
2730 "Device", "Multicast Address",
2731 "Source Address", "INC", "EXC");
2734 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
2735 state->dev->ifindex, state->dev->name,
2736 &state->im->mca_addr,
2738 psf->sf_count[MCAST_INCLUDE],
2739 psf->sf_count[MCAST_EXCLUDE]);
2744 static const struct seq_operations igmp6_mcf_seq_ops = {
2745 .start = igmp6_mcf_seq_start,
2746 .next = igmp6_mcf_seq_next,
2747 .stop = igmp6_mcf_seq_stop,
2748 .show = igmp6_mcf_seq_show,
2751 static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2753 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2754 sizeof(struct igmp6_mcf_iter_state));
2757 static const struct file_operations igmp6_mcf_seq_fops = {
2758 .owner = THIS_MODULE,
2759 .open = igmp6_mcf_seq_open,
2761 .llseek = seq_lseek,
2762 .release = seq_release_net,
2765 static int __net_init igmp6_proc_init(struct net *net)
2770 if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops))
2772 if (!proc_create("mcfilter6", S_IRUGO, net->proc_net,
2773 &igmp6_mcf_seq_fops))
2774 goto out_proc_net_igmp6;
2781 remove_proc_entry("igmp6", net->proc_net);
2785 static void __net_exit igmp6_proc_exit(struct net *net)
2787 remove_proc_entry("mcfilter6", net->proc_net);
2788 remove_proc_entry("igmp6", net->proc_net);
2791 static inline int igmp6_proc_init(struct net *net)
2795 static inline void igmp6_proc_exit(struct net *net)
2800 static int __net_init igmp6_net_init(struct net *net)
2804 err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
2805 SOCK_RAW, IPPROTO_ICMPV6, net);
2807 pr_err("Failed to initialize the IGMP6 control socket (err %d)\n",
2812 inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
2814 err = igmp6_proc_init(net);
2816 goto out_sock_create;
2821 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2825 static void __net_exit igmp6_net_exit(struct net *net)
2827 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2828 igmp6_proc_exit(net);
2831 static struct pernet_operations igmp6_net_ops = {
2832 .init = igmp6_net_init,
2833 .exit = igmp6_net_exit,
2836 int __init igmp6_init(void)
2838 return register_pernet_subsys(&igmp6_net_ops);
2841 void igmp6_cleanup(void)
2843 unregister_pernet_subsys(&igmp6_net_ops);