2 * Multicast support for IPv6
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
18 * yoshfuji : fix format of router-alert option
19 * YOSHIFUJI Hideaki @USAGI:
20 * Fixed source address for MLD message based on
21 * <draft-ietf-magma-mld-source-05.txt>.
22 * YOSHIFUJI Hideaki @USAGI:
23 * - Ignore Queries for invalid addresses.
24 * - MLD for link-local addresses.
25 * David L Stevens <dlstevens@us.ibm.com>:
29 #include <linux/module.h>
30 #include <linux/errno.h>
31 #include <linux/types.h>
32 #include <linux/string.h>
33 #include <linux/socket.h>
34 #include <linux/sockios.h>
35 #include <linux/jiffies.h>
36 #include <linux/times.h>
37 #include <linux/net.h>
39 #include <linux/in6.h>
40 #include <linux/netdevice.h>
41 #include <linux/if_arp.h>
42 #include <linux/route.h>
43 #include <linux/init.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.h>
46 #include <linux/slab.h>
49 #include <linux/netfilter.h>
50 #include <linux/netfilter_ipv6.h>
52 #include <net/net_namespace.h>
57 #include <net/protocol.h>
58 #include <net/if_inet6.h>
59 #include <net/ndisc.h>
60 #include <net/addrconf.h>
61 #include <net/ip6_route.h>
62 #include <net/inet_common.h>
64 #include <net/ip6_checksum.h>
66 /* Set to 3 to get tracing... */
70 #define MDBG(x) printk x
75 /* Ensure that we have struct in6_addr aligned on 32bit word. */
76 static void *__mld2_query_bugs[] __attribute__((__unused__)) = {
77 BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4),
78 BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4),
79 BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4)
82 static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
84 /* Big mc list lock for all the sockets */
85 static DEFINE_SPINLOCK(ipv6_sk_mc_lock);
87 static void igmp6_join_group(struct ifmcaddr6 *ma);
88 static void igmp6_leave_group(struct ifmcaddr6 *ma);
89 static void igmp6_timer_handler(unsigned long data);
91 static void mld_gq_timer_expire(unsigned long data);
92 static void mld_ifc_timer_expire(unsigned long data);
93 static void mld_ifc_event(struct inet6_dev *idev);
94 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
95 static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr);
96 static void mld_clear_delrec(struct inet6_dev *idev);
97 static int sf_setstate(struct ifmcaddr6 *pmc);
98 static void sf_markstate(struct ifmcaddr6 *pmc);
99 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
100 static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
101 int sfmode, int sfcount, const struct in6_addr *psfsrc,
103 static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
104 int sfmode, int sfcount, const struct in6_addr *psfsrc,
106 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
107 struct inet6_dev *idev);
110 #define IGMP6_UNSOLICITED_IVAL (10*HZ)
111 #define MLD_QRV_DEFAULT 2
113 #define MLD_V1_SEEN(idev) (dev_net((idev)->dev)->ipv6.devconf_all->force_mld_version == 1 || \
114 (idev)->cnf.force_mld_version == 1 || \
115 ((idev)->mc_v1_seen && \
116 time_before(jiffies, (idev)->mc_v1_seen)))
118 #define IPV6_MLD_MAX_MSF 64
120 int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
123 * socket join on multicast group
126 #define for_each_pmc_rcu(np, pmc) \
127 for (pmc = rcu_dereference(np->ipv6_mc_list); \
129 pmc = rcu_dereference(pmc->next))
131 int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
133 struct net_device *dev = NULL;
134 struct ipv6_mc_socklist *mc_lst;
135 struct ipv6_pinfo *np = inet6_sk(sk);
136 struct net *net = sock_net(sk);
139 if (!ipv6_addr_is_multicast(addr))
143 for_each_pmc_rcu(np, mc_lst) {
144 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
145 ipv6_addr_equal(&mc_lst->addr, addr)) {
152 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
158 mc_lst->addr = *addr;
163 rt = rt6_lookup(net, addr, NULL, 0, 0);
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 if (!ipv6_addr_is_multicast(addr))
217 spin_lock(&ipv6_sk_mc_lock);
218 for (lnk = &np->ipv6_mc_list;
219 (mc_lst = rcu_dereference_protected(*lnk,
220 lockdep_is_held(&ipv6_sk_mc_lock))) !=NULL ;
221 lnk = &mc_lst->next) {
222 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
223 ipv6_addr_equal(&mc_lst->addr, addr)) {
224 struct net_device *dev;
227 spin_unlock(&ipv6_sk_mc_lock);
230 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
232 struct inet6_dev *idev = __in6_dev_get(dev);
234 (void) ip6_mc_leave_src(sk, mc_lst, idev);
236 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
238 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
240 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
241 kfree_rcu(mc_lst, rcu);
245 spin_unlock(&ipv6_sk_mc_lock);
247 return -EADDRNOTAVAIL;
250 /* called with rcu_read_lock() */
251 static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net,
252 const struct in6_addr *group,
255 struct net_device *dev = NULL;
256 struct inet6_dev *idev = NULL;
259 struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0);
266 dev = dev_get_by_index_rcu(net, ifindex);
270 idev = __in6_dev_get(dev);
273 read_lock_bh(&idev->lock);
275 read_unlock_bh(&idev->lock);
281 void ipv6_sock_mc_close(struct sock *sk)
283 struct ipv6_pinfo *np = inet6_sk(sk);
284 struct ipv6_mc_socklist *mc_lst;
285 struct net *net = sock_net(sk);
287 if (!rcu_access_pointer(np->ipv6_mc_list))
290 spin_lock(&ipv6_sk_mc_lock);
291 while ((mc_lst = rcu_dereference_protected(np->ipv6_mc_list,
292 lockdep_is_held(&ipv6_sk_mc_lock))) != NULL) {
293 struct net_device *dev;
295 np->ipv6_mc_list = mc_lst->next;
296 spin_unlock(&ipv6_sk_mc_lock);
299 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
301 struct inet6_dev *idev = __in6_dev_get(dev);
303 (void) ip6_mc_leave_src(sk, mc_lst, idev);
305 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
307 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
310 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
311 kfree_rcu(mc_lst, rcu);
313 spin_lock(&ipv6_sk_mc_lock);
315 spin_unlock(&ipv6_sk_mc_lock);
318 int ip6_mc_source(int add, int omode, struct sock *sk,
319 struct group_source_req *pgsr)
321 struct in6_addr *source, *group;
322 struct ipv6_mc_socklist *pmc;
323 struct inet6_dev *idev;
324 struct ipv6_pinfo *inet6 = inet6_sk(sk);
325 struct ip6_sf_socklist *psl;
326 struct net *net = sock_net(sk);
332 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
333 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
335 if (!ipv6_addr_is_multicast(group))
339 idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface);
345 err = -EADDRNOTAVAIL;
347 for_each_pmc_rcu(inet6, pmc) {
348 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
350 if (ipv6_addr_equal(&pmc->addr, group))
353 if (!pmc) { /* must have a prior join */
357 /* if a source filter was set, must be the same mode as before */
359 if (pmc->sfmode != omode) {
363 } else if (pmc->sfmode != omode) {
364 /* allow mode switches for empty-set filters */
365 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
366 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
370 write_lock(&pmc->sflock);
376 goto done; /* err = -EADDRNOTAVAIL */
378 for (i=0; i<psl->sl_count; i++) {
379 rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
383 if (rv) /* source not found */
384 goto done; /* err = -EADDRNOTAVAIL */
386 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
387 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
392 /* update the interface filter */
393 ip6_mc_del_src(idev, group, omode, 1, source, 1);
395 for (j=i+1; j<psl->sl_count; j++)
396 psl->sl_addr[j-1] = psl->sl_addr[j];
401 /* else, add a new source to the filter */
403 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
407 if (!psl || psl->sl_count == psl->sl_max) {
408 struct ip6_sf_socklist *newpsl;
409 int count = IP6_SFBLOCK;
412 count += psl->sl_max;
413 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
418 newpsl->sl_max = count;
419 newpsl->sl_count = count - IP6_SFBLOCK;
421 for (i=0; i<psl->sl_count; i++)
422 newpsl->sl_addr[i] = psl->sl_addr[i];
423 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
425 pmc->sflist = psl = newpsl;
427 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
428 for (i=0; i<psl->sl_count; i++) {
429 rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
430 if (rv == 0) /* There is an error in the address. */
433 for (j=psl->sl_count-1; j>=i; j--)
434 psl->sl_addr[j+1] = psl->sl_addr[j];
435 psl->sl_addr[i] = *source;
438 /* update the interface list */
439 ip6_mc_add_src(idev, group, omode, 1, source, 1);
442 write_unlock(&pmc->sflock);
443 read_unlock_bh(&idev->lock);
446 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
450 int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
452 const struct in6_addr *group;
453 struct ipv6_mc_socklist *pmc;
454 struct inet6_dev *idev;
455 struct ipv6_pinfo *inet6 = inet6_sk(sk);
456 struct ip6_sf_socklist *newpsl, *psl;
457 struct net *net = sock_net(sk);
461 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
463 if (!ipv6_addr_is_multicast(group))
465 if (gsf->gf_fmode != MCAST_INCLUDE &&
466 gsf->gf_fmode != MCAST_EXCLUDE)
470 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
479 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
484 for_each_pmc_rcu(inet6, pmc) {
485 if (pmc->ifindex != gsf->gf_interface)
487 if (ipv6_addr_equal(&pmc->addr, group))
490 if (!pmc) { /* must have a prior join */
494 if (gsf->gf_numsrc) {
495 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
501 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
502 for (i=0; i<newpsl->sl_count; ++i) {
503 struct sockaddr_in6 *psin6;
505 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
506 newpsl->sl_addr[i] = psin6->sin6_addr;
508 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
509 newpsl->sl_count, newpsl->sl_addr, 0);
511 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
516 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
519 write_lock(&pmc->sflock);
522 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
523 psl->sl_count, psl->sl_addr, 0);
524 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
526 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
527 pmc->sflist = newpsl;
528 pmc->sfmode = gsf->gf_fmode;
529 write_unlock(&pmc->sflock);
532 read_unlock_bh(&idev->lock);
535 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
539 int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
540 struct group_filter __user *optval, int __user *optlen)
542 int err, i, count, copycount;
543 const struct in6_addr *group;
544 struct ipv6_mc_socklist *pmc;
545 struct inet6_dev *idev;
546 struct ipv6_pinfo *inet6 = inet6_sk(sk);
547 struct ip6_sf_socklist *psl;
548 struct net *net = sock_net(sk);
550 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
552 if (!ipv6_addr_is_multicast(group))
556 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
563 err = -EADDRNOTAVAIL;
565 * changes to the ipv6_mc_list require the socket lock and
566 * a read lock on ip6_sk_mc_lock. We have the socket lock,
567 * so reading the list is safe.
570 for_each_pmc_rcu(inet6, pmc) {
571 if (pmc->ifindex != gsf->gf_interface)
573 if (ipv6_addr_equal(group, &pmc->addr))
576 if (!pmc) /* must have a prior join */
578 gsf->gf_fmode = pmc->sfmode;
580 count = psl ? psl->sl_count : 0;
581 read_unlock_bh(&idev->lock);
584 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
585 gsf->gf_numsrc = count;
586 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
587 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
590 /* changes to psl require the socket lock, a read lock on
591 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
592 * have the socket lock, so reading here is safe.
594 for (i=0; i<copycount; i++) {
595 struct sockaddr_in6 *psin6;
596 struct sockaddr_storage ss;
598 psin6 = (struct sockaddr_in6 *)&ss;
599 memset(&ss, 0, sizeof(ss));
600 psin6->sin6_family = AF_INET6;
601 psin6->sin6_addr = psl->sl_addr[i];
602 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
607 read_unlock_bh(&idev->lock);
612 bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
613 const struct in6_addr *src_addr)
615 struct ipv6_pinfo *np = inet6_sk(sk);
616 struct ipv6_mc_socklist *mc;
617 struct ip6_sf_socklist *psl;
621 for_each_pmc_rcu(np, mc) {
622 if (ipv6_addr_equal(&mc->addr, mc_addr))
629 read_lock(&mc->sflock);
632 rv = mc->sfmode == MCAST_EXCLUDE;
636 for (i=0; i<psl->sl_count; i++) {
637 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
640 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
642 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
645 read_unlock(&mc->sflock);
651 static void ma_put(struct ifmcaddr6 *mc)
653 if (atomic_dec_and_test(&mc->mca_refcnt)) {
654 in6_dev_put(mc->idev);
659 static void igmp6_group_added(struct ifmcaddr6 *mc)
661 struct net_device *dev = mc->idev->dev;
662 char buf[MAX_ADDR_LEN];
664 if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
665 IPV6_ADDR_SCOPE_LINKLOCAL)
668 spin_lock_bh(&mc->mca_lock);
669 if (!(mc->mca_flags&MAF_LOADED)) {
670 mc->mca_flags |= MAF_LOADED;
671 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
672 dev_mc_add(dev, buf);
674 spin_unlock_bh(&mc->mca_lock);
676 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
679 if (MLD_V1_SEEN(mc->idev)) {
680 igmp6_join_group(mc);
685 mc->mca_crcount = mc->idev->mc_qrv;
686 mld_ifc_event(mc->idev);
689 static void igmp6_group_dropped(struct ifmcaddr6 *mc)
691 struct net_device *dev = mc->idev->dev;
692 char buf[MAX_ADDR_LEN];
694 if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
695 IPV6_ADDR_SCOPE_LINKLOCAL)
698 spin_lock_bh(&mc->mca_lock);
699 if (mc->mca_flags&MAF_LOADED) {
700 mc->mca_flags &= ~MAF_LOADED;
701 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
702 dev_mc_del(dev, buf);
705 if (mc->mca_flags & MAF_NOREPORT)
707 spin_unlock_bh(&mc->mca_lock);
710 igmp6_leave_group(mc);
712 spin_lock_bh(&mc->mca_lock);
713 if (del_timer(&mc->mca_timer))
714 atomic_dec(&mc->mca_refcnt);
716 ip6_mc_clear_src(mc);
717 spin_unlock_bh(&mc->mca_lock);
721 * deleted ifmcaddr6 manipulation
723 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
725 struct ifmcaddr6 *pmc;
727 /* this is an "ifmcaddr6" for convenience; only the fields below
728 * are actually used. In particular, the refcnt and users are not
729 * used for management of the delete list. Using the same structure
730 * for deleted items allows change reports to use common code with
731 * non-deleted or query-response MCA's.
733 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
737 spin_lock_bh(&im->mca_lock);
738 spin_lock_init(&pmc->mca_lock);
739 pmc->idev = im->idev;
741 pmc->mca_addr = im->mca_addr;
742 pmc->mca_crcount = idev->mc_qrv;
743 pmc->mca_sfmode = im->mca_sfmode;
744 if (pmc->mca_sfmode == MCAST_INCLUDE) {
745 struct ip6_sf_list *psf;
747 pmc->mca_tomb = im->mca_tomb;
748 pmc->mca_sources = im->mca_sources;
749 im->mca_tomb = im->mca_sources = NULL;
750 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
751 psf->sf_crcount = pmc->mca_crcount;
753 spin_unlock_bh(&im->mca_lock);
755 spin_lock_bh(&idev->mc_lock);
756 pmc->next = idev->mc_tomb;
758 spin_unlock_bh(&idev->mc_lock);
761 static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca)
763 struct ifmcaddr6 *pmc, *pmc_prev;
764 struct ip6_sf_list *psf, *psf_next;
766 spin_lock_bh(&idev->mc_lock);
768 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
769 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
775 pmc_prev->next = pmc->next;
777 idev->mc_tomb = pmc->next;
779 spin_unlock_bh(&idev->mc_lock);
782 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
783 psf_next = psf->sf_next;
786 in6_dev_put(pmc->idev);
791 static void mld_clear_delrec(struct inet6_dev *idev)
793 struct ifmcaddr6 *pmc, *nextpmc;
795 spin_lock_bh(&idev->mc_lock);
797 idev->mc_tomb = NULL;
798 spin_unlock_bh(&idev->mc_lock);
800 for (; pmc; pmc = nextpmc) {
802 ip6_mc_clear_src(pmc);
803 in6_dev_put(pmc->idev);
807 /* clear dead sources, too */
808 read_lock_bh(&idev->lock);
809 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
810 struct ip6_sf_list *psf, *psf_next;
812 spin_lock_bh(&pmc->mca_lock);
814 pmc->mca_tomb = NULL;
815 spin_unlock_bh(&pmc->mca_lock);
816 for (; psf; psf=psf_next) {
817 psf_next = psf->sf_next;
821 read_unlock_bh(&idev->lock);
826 * device multicast group inc (add if not found)
828 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
830 struct ifmcaddr6 *mc;
831 struct inet6_dev *idev;
833 /* we need to take a reference on idev */
834 idev = in6_dev_get(dev);
839 write_lock_bh(&idev->lock);
841 write_unlock_bh(&idev->lock);
846 for (mc = idev->mc_list; mc; mc = mc->next) {
847 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
849 write_unlock_bh(&idev->lock);
850 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
858 * not found: create a new one.
861 mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
864 write_unlock_bh(&idev->lock);
869 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
871 mc->mca_addr = *addr;
872 mc->idev = idev; /* (reference taken) */
874 /* mca_stamp should be updated upon changes */
875 mc->mca_cstamp = mc->mca_tstamp = jiffies;
876 atomic_set(&mc->mca_refcnt, 2);
877 spin_lock_init(&mc->mca_lock);
879 /* initial mode is (EX, empty) */
880 mc->mca_sfmode = MCAST_EXCLUDE;
881 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
883 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
884 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
885 mc->mca_flags |= MAF_NOREPORT;
887 mc->next = idev->mc_list;
889 write_unlock_bh(&idev->lock);
891 mld_del_delrec(idev, &mc->mca_addr);
892 igmp6_group_added(mc);
898 * device multicast group del
900 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
902 struct ifmcaddr6 *ma, **map;
904 write_lock_bh(&idev->lock);
905 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
906 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
907 if (--ma->mca_users == 0) {
909 write_unlock_bh(&idev->lock);
911 igmp6_group_dropped(ma);
916 write_unlock_bh(&idev->lock);
920 write_unlock_bh(&idev->lock);
925 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
927 struct inet6_dev *idev;
932 idev = __in6_dev_get(dev);
936 err = __ipv6_dev_mc_dec(idev, addr);
943 * check if the interface/address pair is valid
945 bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
946 const struct in6_addr *src_addr)
948 struct inet6_dev *idev;
949 struct ifmcaddr6 *mc;
953 idev = __in6_dev_get(dev);
955 read_lock_bh(&idev->lock);
956 for (mc = idev->mc_list; mc; mc=mc->next) {
957 if (ipv6_addr_equal(&mc->mca_addr, group))
961 if (src_addr && !ipv6_addr_any(src_addr)) {
962 struct ip6_sf_list *psf;
964 spin_lock_bh(&mc->mca_lock);
965 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
966 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
970 rv = psf->sf_count[MCAST_INCLUDE] ||
971 psf->sf_count[MCAST_EXCLUDE] !=
972 mc->mca_sfcount[MCAST_EXCLUDE];
974 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
975 spin_unlock_bh(&mc->mca_lock);
977 rv = true; /* don't filter unspecified source */
979 read_unlock_bh(&idev->lock);
985 static void mld_gq_start_timer(struct inet6_dev *idev)
987 int tv = net_random() % idev->mc_maxdelay;
989 idev->mc_gq_running = 1;
990 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
994 static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
996 int tv = net_random() % delay;
998 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1003 * IGMP handling (alias multicast ICMPv6 messages)
1006 static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1008 unsigned long delay = resptime;
1010 /* Do not start timer for these addresses */
1011 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1012 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1015 if (del_timer(&ma->mca_timer)) {
1016 atomic_dec(&ma->mca_refcnt);
1017 delay = ma->mca_timer.expires - jiffies;
1020 if (delay >= resptime) {
1022 delay = net_random() % resptime;
1026 ma->mca_timer.expires = jiffies + delay;
1027 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1028 atomic_inc(&ma->mca_refcnt);
1029 ma->mca_flags |= MAF_TIMER_RUNNING;
1032 /* mark EXCLUDE-mode sources */
1033 static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
1034 const struct in6_addr *srcs)
1036 struct ip6_sf_list *psf;
1040 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1041 if (scount == nsrcs)
1043 for (i=0; i<nsrcs; i++) {
1044 /* skip inactive filters */
1045 if (psf->sf_count[MCAST_INCLUDE] ||
1046 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1047 psf->sf_count[MCAST_EXCLUDE])
1049 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1055 pmc->mca_flags &= ~MAF_GSQUERY;
1056 if (scount == nsrcs) /* all sources excluded */
1061 static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1062 const struct in6_addr *srcs)
1064 struct ip6_sf_list *psf;
1067 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1068 return mld_xmarksources(pmc, nsrcs, srcs);
1070 /* mark INCLUDE-mode sources */
1073 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1074 if (scount == nsrcs)
1076 for (i=0; i<nsrcs; i++) {
1077 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1085 pmc->mca_flags &= ~MAF_GSQUERY;
1088 pmc->mca_flags |= MAF_GSQUERY;
1092 /* called with rcu_read_lock() */
1093 int igmp6_event_query(struct sk_buff *skb)
1095 struct mld2_query *mlh2 = NULL;
1096 struct ifmcaddr6 *ma;
1097 const struct in6_addr *group;
1098 unsigned long max_delay;
1099 struct inet6_dev *idev;
1100 struct mld_msg *mld;
1105 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1108 /* compute payload length excluding extension headers */
1109 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
1110 len -= skb_network_header_len(skb);
1112 /* Drop queries with not link local source */
1113 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
1116 idev = __in6_dev_get(skb->dev);
1121 mld = (struct mld_msg *)icmp6_hdr(skb);
1122 group = &mld->mld_mca;
1123 group_type = ipv6_addr_type(group);
1125 if (group_type != IPV6_ADDR_ANY &&
1126 !(group_type&IPV6_ADDR_MULTICAST))
1131 /* MLDv1 router present */
1133 /* Translate milliseconds to jiffies */
1134 max_delay = (ntohs(mld->mld_maxdelay)*HZ)/1000;
1136 switchback = (idev->mc_qrv + 1) * max_delay;
1137 idev->mc_v1_seen = jiffies + switchback;
1139 /* cancel the interface change timer */
1140 idev->mc_ifc_count = 0;
1141 if (del_timer(&idev->mc_ifc_timer))
1142 __in6_dev_put(idev);
1143 /* clear deleted report items */
1144 mld_clear_delrec(idev);
1145 } else if (len >= 28) {
1146 int srcs_offset = sizeof(struct mld2_query) -
1147 sizeof(struct icmp6hdr);
1148 if (!pskb_may_pull(skb, srcs_offset))
1151 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1152 max_delay = (MLDV2_MRC(ntohs(mlh2->mld2q_mrc))*HZ)/1000;
1155 idev->mc_maxdelay = max_delay;
1156 if (mlh2->mld2q_qrv)
1157 idev->mc_qrv = mlh2->mld2q_qrv;
1158 if (group_type == IPV6_ADDR_ANY) { /* general query */
1159 if (mlh2->mld2q_nsrcs)
1160 return -EINVAL; /* no sources allowed */
1162 mld_gq_start_timer(idev);
1165 /* mark sources to include, if group & source-specific */
1166 if (mlh2->mld2q_nsrcs != 0) {
1167 if (!pskb_may_pull(skb, srcs_offset +
1168 ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr)))
1171 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1177 read_lock_bh(&idev->lock);
1178 if (group_type == IPV6_ADDR_ANY) {
1179 for (ma = idev->mc_list; ma; ma=ma->next) {
1180 spin_lock_bh(&ma->mca_lock);
1181 igmp6_group_queried(ma, max_delay);
1182 spin_unlock_bh(&ma->mca_lock);
1185 for (ma = idev->mc_list; ma; ma=ma->next) {
1186 if (!ipv6_addr_equal(group, &ma->mca_addr))
1188 spin_lock_bh(&ma->mca_lock);
1189 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1190 /* gsquery <- gsquery && mark */
1192 ma->mca_flags &= ~MAF_GSQUERY;
1194 /* gsquery <- mark */
1196 ma->mca_flags |= MAF_GSQUERY;
1198 ma->mca_flags &= ~MAF_GSQUERY;
1200 if (!(ma->mca_flags & MAF_GSQUERY) ||
1201 mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs))
1202 igmp6_group_queried(ma, max_delay);
1203 spin_unlock_bh(&ma->mca_lock);
1207 read_unlock_bh(&idev->lock);
1212 /* called with rcu_read_lock() */
1213 int igmp6_event_report(struct sk_buff *skb)
1215 struct ifmcaddr6 *ma;
1216 struct inet6_dev *idev;
1217 struct mld_msg *mld;
1220 /* Our own report looped back. Ignore it. */
1221 if (skb->pkt_type == PACKET_LOOPBACK)
1224 /* send our report if the MC router may not have heard this report */
1225 if (skb->pkt_type != PACKET_MULTICAST &&
1226 skb->pkt_type != PACKET_BROADCAST)
1229 if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr)))
1232 mld = (struct mld_msg *)icmp6_hdr(skb);
1234 /* Drop reports with not link local source */
1235 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
1236 if (addr_type != IPV6_ADDR_ANY &&
1237 !(addr_type&IPV6_ADDR_LINKLOCAL))
1240 idev = __in6_dev_get(skb->dev);
1245 * Cancel the timer for this group
1248 read_lock_bh(&idev->lock);
1249 for (ma = idev->mc_list; ma; ma=ma->next) {
1250 if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) {
1251 spin_lock(&ma->mca_lock);
1252 if (del_timer(&ma->mca_timer))
1253 atomic_dec(&ma->mca_refcnt);
1254 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1255 spin_unlock(&ma->mca_lock);
1259 read_unlock_bh(&idev->lock);
1263 static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1264 int gdeleted, int sdeleted)
1267 case MLD2_MODE_IS_INCLUDE:
1268 case MLD2_MODE_IS_EXCLUDE:
1269 if (gdeleted || sdeleted)
1271 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1272 if (pmc->mca_sfmode == MCAST_INCLUDE)
1274 /* don't include if this source is excluded
1277 if (psf->sf_count[MCAST_INCLUDE])
1278 return type == MLD2_MODE_IS_INCLUDE;
1279 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1280 psf->sf_count[MCAST_EXCLUDE];
1283 case MLD2_CHANGE_TO_INCLUDE:
1284 if (gdeleted || sdeleted)
1286 return psf->sf_count[MCAST_INCLUDE] != 0;
1287 case MLD2_CHANGE_TO_EXCLUDE:
1288 if (gdeleted || sdeleted)
1290 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1291 psf->sf_count[MCAST_INCLUDE])
1293 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1294 psf->sf_count[MCAST_EXCLUDE];
1295 case MLD2_ALLOW_NEW_SOURCES:
1296 if (gdeleted || !psf->sf_crcount)
1298 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1299 case MLD2_BLOCK_OLD_SOURCES:
1300 if (pmc->mca_sfmode == MCAST_INCLUDE)
1301 return gdeleted || (psf->sf_crcount && sdeleted);
1302 return psf->sf_crcount && !gdeleted && !sdeleted;
1308 mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1310 struct ip6_sf_list *psf;
1313 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1314 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1321 static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb,
1322 struct net_device *dev,
1323 const struct in6_addr *saddr,
1324 const struct in6_addr *daddr,
1327 struct ipv6hdr *hdr;
1329 skb->protocol = htons(ETH_P_IPV6);
1332 skb_reset_network_header(skb);
1333 skb_put(skb, sizeof(struct ipv6hdr));
1334 hdr = ipv6_hdr(skb);
1336 ip6_flow_hdr(hdr, 0, 0);
1338 hdr->payload_len = htons(len);
1339 hdr->nexthdr = proto;
1340 hdr->hop_limit = inet6_sk(sk)->hop_limit;
1342 hdr->saddr = *saddr;
1343 hdr->daddr = *daddr;
1346 static struct sk_buff *mld_newpack(struct inet6_dev *idev, int size)
1348 struct net_device *dev = idev->dev;
1349 struct net *net = dev_net(dev);
1350 struct sock *sk = net->ipv6.igmp_sk;
1351 struct sk_buff *skb;
1352 struct mld2_report *pmr;
1353 struct in6_addr addr_buf;
1354 const struct in6_addr *saddr;
1355 int hlen = LL_RESERVED_SPACE(dev);
1356 int tlen = dev->needed_tailroom;
1358 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1359 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1362 /* we assume size > sizeof(ra) here */
1363 size += hlen + tlen;
1364 /* limit our allocations to order-0 page */
1365 size = min_t(int, size, SKB_MAX_ORDER(0, 0));
1366 skb = sock_alloc_send_skb(sk, size, 1, &err);
1371 skb_reserve(skb, hlen);
1373 if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) {
1374 /* <draft-ietf-magma-mld-source-05.txt>:
1375 * use unspecified address as the source address
1376 * when a valid link-local address is not available.
1378 saddr = &in6addr_any;
1382 ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0);
1384 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1386 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
1387 skb_put(skb, sizeof(*pmr));
1388 pmr = (struct mld2_report *)skb_transport_header(skb);
1389 pmr->mld2r_type = ICMPV6_MLD2_REPORT;
1390 pmr->mld2r_resv1 = 0;
1391 pmr->mld2r_cksum = 0;
1392 pmr->mld2r_resv2 = 0;
1393 pmr->mld2r_ngrec = 0;
1397 static void mld_sendpack(struct sk_buff *skb)
1399 struct ipv6hdr *pip6 = ipv6_hdr(skb);
1400 struct mld2_report *pmr =
1401 (struct mld2_report *)skb_transport_header(skb);
1402 int payload_len, mldlen;
1403 struct inet6_dev *idev;
1404 struct net *net = dev_net(skb->dev);
1407 struct dst_entry *dst;
1410 idev = __in6_dev_get(skb->dev);
1411 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
1413 payload_len = (skb->tail - skb->network_header) - sizeof(*pip6);
1414 mldlen = skb->tail - skb->transport_header;
1415 pip6->payload_len = htons(payload_len);
1417 pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1419 csum_partial(skb_transport_header(skb),
1422 icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT,
1423 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1425 dst = icmp6_dst_alloc(skb->dev, &fl6);
1432 skb_dst_set(skb, dst);
1436 payload_len = skb->len;
1438 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1442 ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT);
1443 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
1444 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, payload_len);
1446 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
1457 static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1459 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
1462 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1463 int type, struct mld2_grec **ppgr)
1465 struct net_device *dev = pmc->idev->dev;
1466 struct mld2_report *pmr;
1467 struct mld2_grec *pgr;
1470 skb = mld_newpack(pmc->idev, dev->mtu);
1473 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1474 pgr->grec_type = type;
1475 pgr->grec_auxwords = 0;
1476 pgr->grec_nsrcs = 0;
1477 pgr->grec_mca = pmc->mca_addr; /* structure copy */
1478 pmr = (struct mld2_report *)skb_transport_header(skb);
1479 pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1);
1484 #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1485 skb_tailroom(skb)) : 0)
1487 static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1488 int type, int gdeleted, int sdeleted)
1490 struct inet6_dev *idev = pmc->idev;
1491 struct net_device *dev = idev->dev;
1492 struct mld2_report *pmr;
1493 struct mld2_grec *pgr = NULL;
1494 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
1495 int scount, stotal, first, isquery, truncate;
1497 if (pmc->mca_flags & MAF_NOREPORT)
1500 isquery = type == MLD2_MODE_IS_INCLUDE ||
1501 type == MLD2_MODE_IS_EXCLUDE;
1502 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1503 type == MLD2_CHANGE_TO_EXCLUDE;
1505 stotal = scount = 0;
1507 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1512 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
1514 /* EX and TO_EX get a fresh packet, if needed */
1516 if (pmr && pmr->mld2r_ngrec &&
1517 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1520 skb = mld_newpack(idev, dev->mtu);
1525 for (psf=*psf_list; psf; psf=psf_next) {
1526 struct in6_addr *psrc;
1528 psf_next = psf->sf_next;
1530 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1535 /* clear marks on query responses */
1539 if (AVAILABLE(skb) < sizeof(*psrc) +
1540 first*sizeof(struct mld2_grec)) {
1541 if (truncate && !first)
1542 break; /* truncate these */
1544 pgr->grec_nsrcs = htons(scount);
1547 skb = mld_newpack(idev, dev->mtu);
1552 skb = add_grhead(skb, pmc, type, &pgr);
1557 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1558 *psrc = psf->sf_addr;
1560 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1561 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1563 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1565 psf_prev->sf_next = psf->sf_next;
1567 *psf_list = psf->sf_next;
1577 if (type == MLD2_ALLOW_NEW_SOURCES ||
1578 type == MLD2_BLOCK_OLD_SOURCES)
1580 if (pmc->mca_crcount || isquery) {
1581 /* make sure we have room for group header */
1582 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1584 skb = NULL; /* add_grhead will get a new one */
1586 skb = add_grhead(skb, pmc, type, &pgr);
1590 pgr->grec_nsrcs = htons(scount);
1593 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1597 static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1599 struct sk_buff *skb = NULL;
1602 read_lock_bh(&idev->lock);
1604 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1605 if (pmc->mca_flags & MAF_NOREPORT)
1607 spin_lock_bh(&pmc->mca_lock);
1608 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1609 type = MLD2_MODE_IS_EXCLUDE;
1611 type = MLD2_MODE_IS_INCLUDE;
1612 skb = add_grec(skb, pmc, type, 0, 0);
1613 spin_unlock_bh(&pmc->mca_lock);
1616 spin_lock_bh(&pmc->mca_lock);
1617 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1618 type = MLD2_MODE_IS_EXCLUDE;
1620 type = MLD2_MODE_IS_INCLUDE;
1621 skb = add_grec(skb, pmc, type, 0, 0);
1622 spin_unlock_bh(&pmc->mca_lock);
1624 read_unlock_bh(&idev->lock);
1630 * remove zero-count source records from a source filter list
1632 static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1634 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1637 for (psf=*ppsf; psf; psf = psf_next) {
1638 psf_next = psf->sf_next;
1639 if (psf->sf_crcount == 0) {
1641 psf_prev->sf_next = psf->sf_next;
1643 *ppsf = psf->sf_next;
1650 static void mld_send_cr(struct inet6_dev *idev)
1652 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1653 struct sk_buff *skb = NULL;
1656 read_lock_bh(&idev->lock);
1657 spin_lock(&idev->mc_lock);
1661 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1662 pmc_next = pmc->next;
1663 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1664 type = MLD2_BLOCK_OLD_SOURCES;
1665 dtype = MLD2_BLOCK_OLD_SOURCES;
1666 skb = add_grec(skb, pmc, type, 1, 0);
1667 skb = add_grec(skb, pmc, dtype, 1, 1);
1669 if (pmc->mca_crcount) {
1670 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1671 type = MLD2_CHANGE_TO_INCLUDE;
1672 skb = add_grec(skb, pmc, type, 1, 0);
1675 if (pmc->mca_crcount == 0) {
1676 mld_clear_zeros(&pmc->mca_tomb);
1677 mld_clear_zeros(&pmc->mca_sources);
1680 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1681 !pmc->mca_sources) {
1683 pmc_prev->next = pmc_next;
1685 idev->mc_tomb = pmc_next;
1686 in6_dev_put(pmc->idev);
1691 spin_unlock(&idev->mc_lock);
1694 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1695 spin_lock_bh(&pmc->mca_lock);
1696 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1697 type = MLD2_BLOCK_OLD_SOURCES;
1698 dtype = MLD2_ALLOW_NEW_SOURCES;
1700 type = MLD2_ALLOW_NEW_SOURCES;
1701 dtype = MLD2_BLOCK_OLD_SOURCES;
1703 skb = add_grec(skb, pmc, type, 0, 0);
1704 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1706 /* filter mode changes */
1707 if (pmc->mca_crcount) {
1708 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1709 type = MLD2_CHANGE_TO_EXCLUDE;
1711 type = MLD2_CHANGE_TO_INCLUDE;
1712 skb = add_grec(skb, pmc, type, 0, 0);
1715 spin_unlock_bh(&pmc->mca_lock);
1717 read_unlock_bh(&idev->lock);
1720 (void) mld_sendpack(skb);
1723 static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1725 struct net *net = dev_net(dev);
1726 struct sock *sk = net->ipv6.igmp_sk;
1727 struct inet6_dev *idev;
1728 struct sk_buff *skb;
1729 struct mld_msg *hdr;
1730 const struct in6_addr *snd_addr, *saddr;
1731 struct in6_addr addr_buf;
1732 int hlen = LL_RESERVED_SPACE(dev);
1733 int tlen = dev->needed_tailroom;
1734 int err, len, payload_len, full_len;
1735 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1736 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1739 struct dst_entry *dst;
1741 if (type == ICMPV6_MGM_REDUCTION)
1742 snd_addr = &in6addr_linklocal_allrouters;
1746 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1747 payload_len = len + sizeof(ra);
1748 full_len = sizeof(struct ipv6hdr) + payload_len;
1751 IP6_UPD_PO_STATS(net, __in6_dev_get(dev),
1752 IPSTATS_MIB_OUT, full_len);
1755 skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err);
1759 IP6_INC_STATS(net, __in6_dev_get(dev),
1760 IPSTATS_MIB_OUTDISCARDS);
1765 skb_reserve(skb, hlen);
1767 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1768 /* <draft-ietf-magma-mld-source-05.txt>:
1769 * use unspecified address as the source address
1770 * when a valid link-local address is not available.
1772 saddr = &in6addr_any;
1776 ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len);
1778 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1780 hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg));
1781 memset(hdr, 0, sizeof(struct mld_msg));
1782 hdr->mld_type = type;
1783 hdr->mld_mca = *addr;
1785 hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len,
1787 csum_partial(hdr, len, 0));
1790 idev = __in6_dev_get(skb->dev);
1792 icmpv6_flow_init(sk, &fl6, type,
1793 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1795 dst = icmp6_dst_alloc(skb->dev, &fl6);
1801 skb_dst_set(skb, dst);
1802 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1806 ICMP6MSGOUT_INC_STATS(net, idev, type);
1807 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
1808 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len);
1810 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
1820 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
1821 const struct in6_addr *psfsrc)
1823 struct ip6_sf_list *psf, *psf_prev;
1827 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1828 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1832 if (!psf || psf->sf_count[sfmode] == 0) {
1833 /* source filter not found, or count wrong => bug */
1836 psf->sf_count[sfmode]--;
1837 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1838 struct inet6_dev *idev = pmc->idev;
1840 /* no more filters for this source */
1842 psf_prev->sf_next = psf->sf_next;
1844 pmc->mca_sources = psf->sf_next;
1845 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1846 !MLD_V1_SEEN(idev)) {
1847 psf->sf_crcount = idev->mc_qrv;
1848 psf->sf_next = pmc->mca_tomb;
1849 pmc->mca_tomb = psf;
1857 static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
1858 int sfmode, int sfcount, const struct in6_addr *psfsrc,
1861 struct ifmcaddr6 *pmc;
1867 read_lock_bh(&idev->lock);
1868 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1869 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1873 /* MCA not found?? bug */
1874 read_unlock_bh(&idev->lock);
1877 spin_lock_bh(&pmc->mca_lock);
1880 if (!pmc->mca_sfcount[sfmode]) {
1881 spin_unlock_bh(&pmc->mca_lock);
1882 read_unlock_bh(&idev->lock);
1885 pmc->mca_sfcount[sfmode]--;
1888 for (i=0; i<sfcount; i++) {
1889 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1891 changerec |= rv > 0;
1895 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1896 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1897 pmc->mca_sfcount[MCAST_INCLUDE]) {
1898 struct ip6_sf_list *psf;
1900 /* filter mode change */
1901 pmc->mca_sfmode = MCAST_INCLUDE;
1902 pmc->mca_crcount = idev->mc_qrv;
1903 idev->mc_ifc_count = pmc->mca_crcount;
1904 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1905 psf->sf_crcount = 0;
1906 mld_ifc_event(pmc->idev);
1907 } else if (sf_setstate(pmc) || changerec)
1908 mld_ifc_event(pmc->idev);
1909 spin_unlock_bh(&pmc->mca_lock);
1910 read_unlock_bh(&idev->lock);
1915 * Add multicast single-source filter to the interface list
1917 static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
1918 const struct in6_addr *psfsrc)
1920 struct ip6_sf_list *psf, *psf_prev;
1923 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1924 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1929 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
1933 psf->sf_addr = *psfsrc;
1935 psf_prev->sf_next = psf;
1937 pmc->mca_sources = psf;
1939 psf->sf_count[sfmode]++;
1943 static void sf_markstate(struct ifmcaddr6 *pmc)
1945 struct ip6_sf_list *psf;
1946 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1948 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1949 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1950 psf->sf_oldin = mca_xcount ==
1951 psf->sf_count[MCAST_EXCLUDE] &&
1952 !psf->sf_count[MCAST_INCLUDE];
1954 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
1957 static int sf_setstate(struct ifmcaddr6 *pmc)
1959 struct ip6_sf_list *psf, *dpsf;
1960 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1961 int qrv = pmc->idev->mc_qrv;
1965 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1966 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1967 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
1968 !psf->sf_count[MCAST_INCLUDE];
1970 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
1972 if (!psf->sf_oldin) {
1973 struct ip6_sf_list *prev = NULL;
1975 for (dpsf=pmc->mca_tomb; dpsf;
1976 dpsf=dpsf->sf_next) {
1977 if (ipv6_addr_equal(&dpsf->sf_addr,
1984 prev->sf_next = dpsf->sf_next;
1986 pmc->mca_tomb = dpsf->sf_next;
1989 psf->sf_crcount = qrv;
1992 } else if (psf->sf_oldin) {
1993 psf->sf_crcount = 0;
1995 * add or update "delete" records if an active filter
1998 for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
1999 if (ipv6_addr_equal(&dpsf->sf_addr,
2003 dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
2007 /* pmc->mca_lock held by callers */
2008 dpsf->sf_next = pmc->mca_tomb;
2009 pmc->mca_tomb = dpsf;
2011 dpsf->sf_crcount = qrv;
2019 * Add multicast source filter list to the interface list
2021 static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2022 int sfmode, int sfcount, const struct in6_addr *psfsrc,
2025 struct ifmcaddr6 *pmc;
2031 read_lock_bh(&idev->lock);
2032 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2033 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2037 /* MCA not found?? bug */
2038 read_unlock_bh(&idev->lock);
2041 spin_lock_bh(&pmc->mca_lock);
2044 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2046 pmc->mca_sfcount[sfmode]++;
2048 for (i=0; i<sfcount; i++) {
2049 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]);
2057 pmc->mca_sfcount[sfmode]--;
2059 ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]);
2060 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
2061 struct ip6_sf_list *psf;
2063 /* filter mode change */
2064 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2065 pmc->mca_sfmode = MCAST_EXCLUDE;
2066 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2067 pmc->mca_sfmode = MCAST_INCLUDE;
2068 /* else no filters; keep old mode for reports */
2070 pmc->mca_crcount = idev->mc_qrv;
2071 idev->mc_ifc_count = pmc->mca_crcount;
2072 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2073 psf->sf_crcount = 0;
2074 mld_ifc_event(idev);
2075 } else if (sf_setstate(pmc))
2076 mld_ifc_event(idev);
2077 spin_unlock_bh(&pmc->mca_lock);
2078 read_unlock_bh(&idev->lock);
2082 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2084 struct ip6_sf_list *psf, *nextpsf;
2086 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
2087 nextpsf = psf->sf_next;
2090 pmc->mca_tomb = NULL;
2091 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
2092 nextpsf = psf->sf_next;
2095 pmc->mca_sources = NULL;
2096 pmc->mca_sfmode = MCAST_EXCLUDE;
2097 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
2098 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2102 static void igmp6_join_group(struct ifmcaddr6 *ma)
2104 unsigned long delay;
2106 if (ma->mca_flags & MAF_NOREPORT)
2109 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2111 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
2113 spin_lock_bh(&ma->mca_lock);
2114 if (del_timer(&ma->mca_timer)) {
2115 atomic_dec(&ma->mca_refcnt);
2116 delay = ma->mca_timer.expires - jiffies;
2119 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2120 atomic_inc(&ma->mca_refcnt);
2121 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2122 spin_unlock_bh(&ma->mca_lock);
2125 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2126 struct inet6_dev *idev)
2130 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2131 * so no other readers or writers of iml or its sflist
2134 /* any-source empty exclude case */
2135 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2137 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2138 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2139 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2144 static void igmp6_leave_group(struct ifmcaddr6 *ma)
2146 if (MLD_V1_SEEN(ma->idev)) {
2147 if (ma->mca_flags & MAF_LAST_REPORTER)
2148 igmp6_send(&ma->mca_addr, ma->idev->dev,
2149 ICMPV6_MGM_REDUCTION);
2151 mld_add_delrec(ma->idev, ma);
2152 mld_ifc_event(ma->idev);
2156 static void mld_gq_timer_expire(unsigned long data)
2158 struct inet6_dev *idev = (struct inet6_dev *)data;
2160 idev->mc_gq_running = 0;
2161 mld_send_report(idev, NULL);
2165 static void mld_ifc_timer_expire(unsigned long data)
2167 struct inet6_dev *idev = (struct inet6_dev *)data;
2170 if (idev->mc_ifc_count) {
2171 idev->mc_ifc_count--;
2172 if (idev->mc_ifc_count)
2173 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2178 static void mld_ifc_event(struct inet6_dev *idev)
2180 if (MLD_V1_SEEN(idev))
2182 idev->mc_ifc_count = idev->mc_qrv;
2183 mld_ifc_start_timer(idev, 1);
2187 static void igmp6_timer_handler(unsigned long data)
2189 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2191 if (MLD_V1_SEEN(ma->idev))
2192 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2194 mld_send_report(ma->idev, ma);
2196 spin_lock(&ma->mca_lock);
2197 ma->mca_flags |= MAF_LAST_REPORTER;
2198 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2199 spin_unlock(&ma->mca_lock);
2203 /* Device changing type */
2205 void ipv6_mc_unmap(struct inet6_dev *idev)
2207 struct ifmcaddr6 *i;
2209 /* Install multicast list, except for all-nodes (already installed) */
2211 read_lock_bh(&idev->lock);
2212 for (i = idev->mc_list; i; i = i->next)
2213 igmp6_group_dropped(i);
2214 read_unlock_bh(&idev->lock);
2217 void ipv6_mc_remap(struct inet6_dev *idev)
2222 /* Device going down */
2224 void ipv6_mc_down(struct inet6_dev *idev)
2226 struct ifmcaddr6 *i;
2228 /* Withdraw multicast list */
2230 read_lock_bh(&idev->lock);
2231 idev->mc_ifc_count = 0;
2232 if (del_timer(&idev->mc_ifc_timer))
2233 __in6_dev_put(idev);
2234 idev->mc_gq_running = 0;
2235 if (del_timer(&idev->mc_gq_timer))
2236 __in6_dev_put(idev);
2238 for (i = idev->mc_list; i; i=i->next)
2239 igmp6_group_dropped(i);
2240 read_unlock_bh(&idev->lock);
2242 mld_clear_delrec(idev);
2246 /* Device going up */
2248 void ipv6_mc_up(struct inet6_dev *idev)
2250 struct ifmcaddr6 *i;
2252 /* Install multicast list, except for all-nodes (already installed) */
2254 read_lock_bh(&idev->lock);
2255 for (i = idev->mc_list; i; i=i->next)
2256 igmp6_group_added(i);
2257 read_unlock_bh(&idev->lock);
2260 /* IPv6 device initialization. */
2262 void ipv6_mc_init_dev(struct inet6_dev *idev)
2264 write_lock_bh(&idev->lock);
2265 spin_lock_init(&idev->mc_lock);
2266 idev->mc_gq_running = 0;
2267 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2268 (unsigned long)idev);
2269 idev->mc_tomb = NULL;
2270 idev->mc_ifc_count = 0;
2271 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2272 (unsigned long)idev);
2273 idev->mc_qrv = MLD_QRV_DEFAULT;
2274 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2275 idev->mc_v1_seen = 0;
2276 write_unlock_bh(&idev->lock);
2280 * Device is about to be destroyed: clean up.
2283 void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2285 struct ifmcaddr6 *i;
2287 /* Deactivate timers */
2290 /* Delete all-nodes address. */
2291 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2292 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2295 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes);
2297 if (idev->cnf.forwarding)
2298 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters);
2300 write_lock_bh(&idev->lock);
2301 while ((i = idev->mc_list) != NULL) {
2302 idev->mc_list = i->next;
2303 write_unlock_bh(&idev->lock);
2305 igmp6_group_dropped(i);
2308 write_lock_bh(&idev->lock);
2310 write_unlock_bh(&idev->lock);
2313 #ifdef CONFIG_PROC_FS
2314 struct igmp6_mc_iter_state {
2315 struct seq_net_private p;
2316 struct net_device *dev;
2317 struct inet6_dev *idev;
2320 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2322 static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2324 struct ifmcaddr6 *im = NULL;
2325 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2326 struct net *net = seq_file_net(seq);
2329 for_each_netdev_rcu(net, state->dev) {
2330 struct inet6_dev *idev;
2331 idev = __in6_dev_get(state->dev);
2334 read_lock_bh(&idev->lock);
2340 read_unlock_bh(&idev->lock);
2345 static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2347 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2351 if (likely(state->idev != NULL))
2352 read_unlock_bh(&state->idev->lock);
2354 state->dev = next_net_device_rcu(state->dev);
2359 state->idev = __in6_dev_get(state->dev);
2362 read_lock_bh(&state->idev->lock);
2363 im = state->idev->mc_list;
2368 static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2370 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2372 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2374 return pos ? NULL : im;
2377 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
2381 return igmp6_mc_get_idx(seq, *pos);
2384 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2386 struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v);
2392 static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
2395 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2397 if (likely(state->idev != NULL)) {
2398 read_unlock_bh(&state->idev->lock);
2405 static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2407 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2408 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2411 "%-4d %-15s %pi6 %5d %08X %ld\n",
2412 state->dev->ifindex, state->dev->name,
2414 im->mca_users, im->mca_flags,
2415 (im->mca_flags&MAF_TIMER_RUNNING) ?
2416 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2420 static const struct seq_operations igmp6_mc_seq_ops = {
2421 .start = igmp6_mc_seq_start,
2422 .next = igmp6_mc_seq_next,
2423 .stop = igmp6_mc_seq_stop,
2424 .show = igmp6_mc_seq_show,
2427 static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2429 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2430 sizeof(struct igmp6_mc_iter_state));
2433 static const struct file_operations igmp6_mc_seq_fops = {
2434 .owner = THIS_MODULE,
2435 .open = igmp6_mc_seq_open,
2437 .llseek = seq_lseek,
2438 .release = seq_release_net,
2441 struct igmp6_mcf_iter_state {
2442 struct seq_net_private p;
2443 struct net_device *dev;
2444 struct inet6_dev *idev;
2445 struct ifmcaddr6 *im;
2448 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2450 static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2452 struct ip6_sf_list *psf = NULL;
2453 struct ifmcaddr6 *im = NULL;
2454 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2455 struct net *net = seq_file_net(seq);
2459 for_each_netdev_rcu(net, state->dev) {
2460 struct inet6_dev *idev;
2461 idev = __in6_dev_get(state->dev);
2462 if (unlikely(idev == NULL))
2464 read_lock_bh(&idev->lock);
2466 if (likely(im != NULL)) {
2467 spin_lock_bh(&im->mca_lock);
2468 psf = im->mca_sources;
2469 if (likely(psf != NULL)) {
2474 spin_unlock_bh(&im->mca_lock);
2476 read_unlock_bh(&idev->lock);
2481 static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2483 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2487 spin_unlock_bh(&state->im->mca_lock);
2488 state->im = state->im->next;
2489 while (!state->im) {
2490 if (likely(state->idev != NULL))
2491 read_unlock_bh(&state->idev->lock);
2493 state->dev = next_net_device_rcu(state->dev);
2498 state->idev = __in6_dev_get(state->dev);
2501 read_lock_bh(&state->idev->lock);
2502 state->im = state->idev->mc_list;
2506 spin_lock_bh(&state->im->mca_lock);
2507 psf = state->im->mca_sources;
2513 static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2515 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2517 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2519 return pos ? NULL : psf;
2522 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
2526 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2529 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2531 struct ip6_sf_list *psf;
2532 if (v == SEQ_START_TOKEN)
2533 psf = igmp6_mcf_get_first(seq);
2535 psf = igmp6_mcf_get_next(seq, v);
2540 static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
2543 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2544 if (likely(state->im != NULL)) {
2545 spin_unlock_bh(&state->im->mca_lock);
2548 if (likely(state->idev != NULL)) {
2549 read_unlock_bh(&state->idev->lock);
2556 static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2558 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2559 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2561 if (v == SEQ_START_TOKEN) {
2564 "%32s %32s %6s %6s\n", "Idx",
2565 "Device", "Multicast Address",
2566 "Source Address", "INC", "EXC");
2569 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
2570 state->dev->ifindex, state->dev->name,
2571 &state->im->mca_addr,
2573 psf->sf_count[MCAST_INCLUDE],
2574 psf->sf_count[MCAST_EXCLUDE]);
2579 static const struct seq_operations igmp6_mcf_seq_ops = {
2580 .start = igmp6_mcf_seq_start,
2581 .next = igmp6_mcf_seq_next,
2582 .stop = igmp6_mcf_seq_stop,
2583 .show = igmp6_mcf_seq_show,
2586 static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2588 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2589 sizeof(struct igmp6_mcf_iter_state));
2592 static const struct file_operations igmp6_mcf_seq_fops = {
2593 .owner = THIS_MODULE,
2594 .open = igmp6_mcf_seq_open,
2596 .llseek = seq_lseek,
2597 .release = seq_release_net,
2600 static int __net_init igmp6_proc_init(struct net *net)
2605 if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops))
2607 if (!proc_create("mcfilter6", S_IRUGO, net->proc_net,
2608 &igmp6_mcf_seq_fops))
2609 goto out_proc_net_igmp6;
2616 remove_proc_entry("igmp6", net->proc_net);
2620 static void __net_exit igmp6_proc_exit(struct net *net)
2622 remove_proc_entry("mcfilter6", net->proc_net);
2623 remove_proc_entry("igmp6", net->proc_net);
2626 static inline int igmp6_proc_init(struct net *net)
2630 static inline void igmp6_proc_exit(struct net *net)
2635 static int __net_init igmp6_net_init(struct net *net)
2639 err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
2640 SOCK_RAW, IPPROTO_ICMPV6, net);
2642 pr_err("Failed to initialize the IGMP6 control socket (err %d)\n",
2647 inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
2649 err = igmp6_proc_init(net);
2651 goto out_sock_create;
2656 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2660 static void __net_exit igmp6_net_exit(struct net *net)
2662 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2663 igmp6_proc_exit(net);
2666 static struct pernet_operations igmp6_net_ops = {
2667 .init = igmp6_net_init,
2668 .exit = igmp6_net_exit,
2671 int __init igmp6_init(void)
2673 return register_pernet_subsys(&igmp6_net_ops);
2676 void igmp6_cleanup(void)
2678 unregister_pernet_subsys(&igmp6_net_ops);