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 = memcmp(&psl->sl_addr[i], source,
380 sizeof(struct in6_addr));
384 if (rv) /* source not found */
385 goto done; /* err = -EADDRNOTAVAIL */
387 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
388 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
393 /* update the interface filter */
394 ip6_mc_del_src(idev, group, omode, 1, source, 1);
396 for (j=i+1; j<psl->sl_count; j++)
397 psl->sl_addr[j-1] = psl->sl_addr[j];
402 /* else, add a new source to the filter */
404 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
408 if (!psl || psl->sl_count == psl->sl_max) {
409 struct ip6_sf_socklist *newpsl;
410 int count = IP6_SFBLOCK;
413 count += psl->sl_max;
414 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
419 newpsl->sl_max = count;
420 newpsl->sl_count = count - IP6_SFBLOCK;
422 for (i=0; i<psl->sl_count; i++)
423 newpsl->sl_addr[i] = psl->sl_addr[i];
424 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
426 pmc->sflist = psl = newpsl;
428 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
429 for (i=0; i<psl->sl_count; i++) {
430 rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr));
434 if (rv == 0) /* address already there is an error */
436 for (j=psl->sl_count-1; j>=i; j--)
437 psl->sl_addr[j+1] = psl->sl_addr[j];
438 psl->sl_addr[i] = *source;
441 /* update the interface list */
442 ip6_mc_add_src(idev, group, omode, 1, source, 1);
445 write_unlock(&pmc->sflock);
446 read_unlock_bh(&idev->lock);
449 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
453 int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
455 const struct in6_addr *group;
456 struct ipv6_mc_socklist *pmc;
457 struct inet6_dev *idev;
458 struct ipv6_pinfo *inet6 = inet6_sk(sk);
459 struct ip6_sf_socklist *newpsl, *psl;
460 struct net *net = sock_net(sk);
464 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
466 if (!ipv6_addr_is_multicast(group))
468 if (gsf->gf_fmode != MCAST_INCLUDE &&
469 gsf->gf_fmode != MCAST_EXCLUDE)
473 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
482 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
487 for_each_pmc_rcu(inet6, pmc) {
488 if (pmc->ifindex != gsf->gf_interface)
490 if (ipv6_addr_equal(&pmc->addr, group))
493 if (!pmc) { /* must have a prior join */
497 if (gsf->gf_numsrc) {
498 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
504 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
505 for (i=0; i<newpsl->sl_count; ++i) {
506 struct sockaddr_in6 *psin6;
508 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
509 newpsl->sl_addr[i] = psin6->sin6_addr;
511 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
512 newpsl->sl_count, newpsl->sl_addr, 0);
514 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
519 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
522 write_lock(&pmc->sflock);
525 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
526 psl->sl_count, psl->sl_addr, 0);
527 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
529 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
530 pmc->sflist = newpsl;
531 pmc->sfmode = gsf->gf_fmode;
532 write_unlock(&pmc->sflock);
535 read_unlock_bh(&idev->lock);
538 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
542 int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
543 struct group_filter __user *optval, int __user *optlen)
545 int err, i, count, copycount;
546 const struct in6_addr *group;
547 struct ipv6_mc_socklist *pmc;
548 struct inet6_dev *idev;
549 struct ipv6_pinfo *inet6 = inet6_sk(sk);
550 struct ip6_sf_socklist *psl;
551 struct net *net = sock_net(sk);
553 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
555 if (!ipv6_addr_is_multicast(group))
559 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
566 err = -EADDRNOTAVAIL;
568 * changes to the ipv6_mc_list require the socket lock and
569 * a read lock on ip6_sk_mc_lock. We have the socket lock,
570 * so reading the list is safe.
573 for_each_pmc_rcu(inet6, pmc) {
574 if (pmc->ifindex != gsf->gf_interface)
576 if (ipv6_addr_equal(group, &pmc->addr))
579 if (!pmc) /* must have a prior join */
581 gsf->gf_fmode = pmc->sfmode;
583 count = psl ? psl->sl_count : 0;
584 read_unlock_bh(&idev->lock);
587 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
588 gsf->gf_numsrc = count;
589 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
590 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
593 /* changes to psl require the socket lock, a read lock on
594 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
595 * have the socket lock, so reading here is safe.
597 for (i=0; i<copycount; i++) {
598 struct sockaddr_in6 *psin6;
599 struct sockaddr_storage ss;
601 psin6 = (struct sockaddr_in6 *)&ss;
602 memset(&ss, 0, sizeof(ss));
603 psin6->sin6_family = AF_INET6;
604 psin6->sin6_addr = psl->sl_addr[i];
605 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
610 read_unlock_bh(&idev->lock);
615 bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
616 const struct in6_addr *src_addr)
618 struct ipv6_pinfo *np = inet6_sk(sk);
619 struct ipv6_mc_socklist *mc;
620 struct ip6_sf_socklist *psl;
624 for_each_pmc_rcu(np, mc) {
625 if (ipv6_addr_equal(&mc->addr, mc_addr))
632 read_lock(&mc->sflock);
635 rv = mc->sfmode == MCAST_EXCLUDE;
639 for (i=0; i<psl->sl_count; i++) {
640 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
643 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
645 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
648 read_unlock(&mc->sflock);
654 static void ma_put(struct ifmcaddr6 *mc)
656 if (atomic_dec_and_test(&mc->mca_refcnt)) {
657 in6_dev_put(mc->idev);
662 static void igmp6_group_added(struct ifmcaddr6 *mc)
664 struct net_device *dev = mc->idev->dev;
665 char buf[MAX_ADDR_LEN];
667 spin_lock_bh(&mc->mca_lock);
668 if (!(mc->mca_flags&MAF_LOADED)) {
669 mc->mca_flags |= MAF_LOADED;
670 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
671 dev_mc_add(dev, buf);
673 spin_unlock_bh(&mc->mca_lock);
675 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
678 if (MLD_V1_SEEN(mc->idev)) {
679 igmp6_join_group(mc);
684 mc->mca_crcount = mc->idev->mc_qrv;
685 mld_ifc_event(mc->idev);
688 static void igmp6_group_dropped(struct ifmcaddr6 *mc)
690 struct net_device *dev = mc->idev->dev;
691 char buf[MAX_ADDR_LEN];
693 spin_lock_bh(&mc->mca_lock);
694 if (mc->mca_flags&MAF_LOADED) {
695 mc->mca_flags &= ~MAF_LOADED;
696 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
697 dev_mc_del(dev, buf);
700 if (mc->mca_flags & MAF_NOREPORT)
702 spin_unlock_bh(&mc->mca_lock);
705 igmp6_leave_group(mc);
707 spin_lock_bh(&mc->mca_lock);
708 if (del_timer(&mc->mca_timer))
709 atomic_dec(&mc->mca_refcnt);
711 ip6_mc_clear_src(mc);
712 spin_unlock_bh(&mc->mca_lock);
716 * deleted ifmcaddr6 manipulation
718 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
720 struct ifmcaddr6 *pmc;
722 /* this is an "ifmcaddr6" for convenience; only the fields below
723 * are actually used. In particular, the refcnt and users are not
724 * used for management of the delete list. Using the same structure
725 * for deleted items allows change reports to use common code with
726 * non-deleted or query-response MCA's.
728 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
732 spin_lock_bh(&im->mca_lock);
733 spin_lock_init(&pmc->mca_lock);
734 pmc->idev = im->idev;
736 pmc->mca_addr = im->mca_addr;
737 pmc->mca_crcount = idev->mc_qrv;
738 pmc->mca_sfmode = im->mca_sfmode;
739 if (pmc->mca_sfmode == MCAST_INCLUDE) {
740 struct ip6_sf_list *psf;
742 pmc->mca_tomb = im->mca_tomb;
743 pmc->mca_sources = im->mca_sources;
744 im->mca_tomb = im->mca_sources = NULL;
745 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
746 psf->sf_crcount = pmc->mca_crcount;
748 spin_unlock_bh(&im->mca_lock);
750 spin_lock_bh(&idev->mc_lock);
751 pmc->next = idev->mc_tomb;
753 spin_unlock_bh(&idev->mc_lock);
756 static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca)
758 struct ifmcaddr6 *pmc, *pmc_prev;
759 struct ip6_sf_list *psf, *psf_next;
761 spin_lock_bh(&idev->mc_lock);
763 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
764 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
770 pmc_prev->next = pmc->next;
772 idev->mc_tomb = pmc->next;
774 spin_unlock_bh(&idev->mc_lock);
777 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
778 psf_next = psf->sf_next;
781 in6_dev_put(pmc->idev);
786 static void mld_clear_delrec(struct inet6_dev *idev)
788 struct ifmcaddr6 *pmc, *nextpmc;
790 spin_lock_bh(&idev->mc_lock);
792 idev->mc_tomb = NULL;
793 spin_unlock_bh(&idev->mc_lock);
795 for (; pmc; pmc = nextpmc) {
797 ip6_mc_clear_src(pmc);
798 in6_dev_put(pmc->idev);
802 /* clear dead sources, too */
803 read_lock_bh(&idev->lock);
804 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
805 struct ip6_sf_list *psf, *psf_next;
807 spin_lock_bh(&pmc->mca_lock);
809 pmc->mca_tomb = NULL;
810 spin_unlock_bh(&pmc->mca_lock);
811 for (; psf; psf=psf_next) {
812 psf_next = psf->sf_next;
816 read_unlock_bh(&idev->lock);
821 * device multicast group inc (add if not found)
823 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
825 struct ifmcaddr6 *mc;
826 struct inet6_dev *idev;
828 /* we need to take a reference on idev */
829 idev = in6_dev_get(dev);
834 write_lock_bh(&idev->lock);
836 write_unlock_bh(&idev->lock);
841 for (mc = idev->mc_list; mc; mc = mc->next) {
842 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
844 write_unlock_bh(&idev->lock);
845 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
853 * not found: create a new one.
856 mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
859 write_unlock_bh(&idev->lock);
864 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
866 mc->mca_addr = *addr;
867 mc->idev = idev; /* (reference taken) */
869 /* mca_stamp should be updated upon changes */
870 mc->mca_cstamp = mc->mca_tstamp = jiffies;
871 atomic_set(&mc->mca_refcnt, 2);
872 spin_lock_init(&mc->mca_lock);
874 /* initial mode is (EX, empty) */
875 mc->mca_sfmode = MCAST_EXCLUDE;
876 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
878 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
879 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
880 mc->mca_flags |= MAF_NOREPORT;
882 mc->next = idev->mc_list;
884 write_unlock_bh(&idev->lock);
886 mld_del_delrec(idev, &mc->mca_addr);
887 igmp6_group_added(mc);
893 * device multicast group del
895 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
897 struct ifmcaddr6 *ma, **map;
899 write_lock_bh(&idev->lock);
900 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
901 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
902 if (--ma->mca_users == 0) {
904 write_unlock_bh(&idev->lock);
906 igmp6_group_dropped(ma);
911 write_unlock_bh(&idev->lock);
915 write_unlock_bh(&idev->lock);
920 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
922 struct inet6_dev *idev;
927 idev = __in6_dev_get(dev);
931 err = __ipv6_dev_mc_dec(idev, addr);
938 * identify MLD packets for MLD filter exceptions
940 bool ipv6_is_mld(struct sk_buff *skb, int nexthdr)
942 struct icmp6hdr *pic;
944 if (nexthdr != IPPROTO_ICMPV6)
947 if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
950 pic = icmp6_hdr(skb);
952 switch (pic->icmp6_type) {
953 case ICMPV6_MGM_QUERY:
954 case ICMPV6_MGM_REPORT:
955 case ICMPV6_MGM_REDUCTION:
956 case ICMPV6_MLD2_REPORT:
965 * check if the interface/address pair is valid
967 bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
968 const struct in6_addr *src_addr)
970 struct inet6_dev *idev;
971 struct ifmcaddr6 *mc;
975 idev = __in6_dev_get(dev);
977 read_lock_bh(&idev->lock);
978 for (mc = idev->mc_list; mc; mc=mc->next) {
979 if (ipv6_addr_equal(&mc->mca_addr, group))
983 if (src_addr && !ipv6_addr_any(src_addr)) {
984 struct ip6_sf_list *psf;
986 spin_lock_bh(&mc->mca_lock);
987 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
988 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
992 rv = psf->sf_count[MCAST_INCLUDE] ||
993 psf->sf_count[MCAST_EXCLUDE] !=
994 mc->mca_sfcount[MCAST_EXCLUDE];
996 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
997 spin_unlock_bh(&mc->mca_lock);
999 rv = true; /* don't filter unspecified source */
1001 read_unlock_bh(&idev->lock);
1007 static void mld_gq_start_timer(struct inet6_dev *idev)
1009 int tv = net_random() % idev->mc_maxdelay;
1011 idev->mc_gq_running = 1;
1012 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1016 static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
1018 int tv = net_random() % delay;
1020 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1025 * IGMP handling (alias multicast ICMPv6 messages)
1028 static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1030 unsigned long delay = resptime;
1032 /* Do not start timer for these addresses */
1033 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1034 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1037 if (del_timer(&ma->mca_timer)) {
1038 atomic_dec(&ma->mca_refcnt);
1039 delay = ma->mca_timer.expires - jiffies;
1042 if (delay >= resptime) {
1044 delay = net_random() % resptime;
1048 ma->mca_timer.expires = jiffies + delay;
1049 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1050 atomic_inc(&ma->mca_refcnt);
1051 ma->mca_flags |= MAF_TIMER_RUNNING;
1054 /* mark EXCLUDE-mode sources */
1055 static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
1056 const struct in6_addr *srcs)
1058 struct ip6_sf_list *psf;
1062 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1063 if (scount == nsrcs)
1065 for (i=0; i<nsrcs; i++) {
1066 /* skip inactive filters */
1067 if (psf->sf_count[MCAST_INCLUDE] ||
1068 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1069 psf->sf_count[MCAST_EXCLUDE])
1071 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1077 pmc->mca_flags &= ~MAF_GSQUERY;
1078 if (scount == nsrcs) /* all sources excluded */
1083 static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1084 const struct in6_addr *srcs)
1086 struct ip6_sf_list *psf;
1089 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1090 return mld_xmarksources(pmc, nsrcs, srcs);
1092 /* mark INCLUDE-mode sources */
1095 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1096 if (scount == nsrcs)
1098 for (i=0; i<nsrcs; i++) {
1099 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1107 pmc->mca_flags &= ~MAF_GSQUERY;
1110 pmc->mca_flags |= MAF_GSQUERY;
1114 /* called with rcu_read_lock() */
1115 int igmp6_event_query(struct sk_buff *skb)
1117 struct mld2_query *mlh2 = NULL;
1118 struct ifmcaddr6 *ma;
1119 const struct in6_addr *group;
1120 unsigned long max_delay;
1121 struct inet6_dev *idev;
1122 struct mld_msg *mld;
1127 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1130 /* compute payload length excluding extension headers */
1131 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
1132 len -= skb_network_header_len(skb);
1134 /* Drop queries with not link local source */
1135 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
1138 idev = __in6_dev_get(skb->dev);
1143 mld = (struct mld_msg *)icmp6_hdr(skb);
1144 group = &mld->mld_mca;
1145 group_type = ipv6_addr_type(group);
1147 if (group_type != IPV6_ADDR_ANY &&
1148 !(group_type&IPV6_ADDR_MULTICAST))
1153 /* MLDv1 router present */
1155 /* Translate milliseconds to jiffies */
1156 max_delay = (ntohs(mld->mld_maxdelay)*HZ)/1000;
1158 switchback = (idev->mc_qrv + 1) * max_delay;
1159 idev->mc_v1_seen = jiffies + switchback;
1161 /* cancel the interface change timer */
1162 idev->mc_ifc_count = 0;
1163 if (del_timer(&idev->mc_ifc_timer))
1164 __in6_dev_put(idev);
1165 /* clear deleted report items */
1166 mld_clear_delrec(idev);
1167 } else if (len >= 28) {
1168 int srcs_offset = sizeof(struct mld2_query) -
1169 sizeof(struct icmp6hdr);
1170 if (!pskb_may_pull(skb, srcs_offset))
1173 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1174 max_delay = (MLDV2_MRC(ntohs(mlh2->mld2q_mrc))*HZ)/1000;
1177 idev->mc_maxdelay = max_delay;
1178 if (mlh2->mld2q_qrv)
1179 idev->mc_qrv = mlh2->mld2q_qrv;
1180 if (group_type == IPV6_ADDR_ANY) { /* general query */
1181 if (mlh2->mld2q_nsrcs)
1182 return -EINVAL; /* no sources allowed */
1184 mld_gq_start_timer(idev);
1187 /* mark sources to include, if group & source-specific */
1188 if (mlh2->mld2q_nsrcs != 0) {
1189 if (!pskb_may_pull(skb, srcs_offset +
1190 ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr)))
1193 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1199 read_lock_bh(&idev->lock);
1200 if (group_type == IPV6_ADDR_ANY) {
1201 for (ma = idev->mc_list; ma; ma=ma->next) {
1202 spin_lock_bh(&ma->mca_lock);
1203 igmp6_group_queried(ma, max_delay);
1204 spin_unlock_bh(&ma->mca_lock);
1207 for (ma = idev->mc_list; ma; ma=ma->next) {
1208 if (!ipv6_addr_equal(group, &ma->mca_addr))
1210 spin_lock_bh(&ma->mca_lock);
1211 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1212 /* gsquery <- gsquery && mark */
1214 ma->mca_flags &= ~MAF_GSQUERY;
1216 /* gsquery <- mark */
1218 ma->mca_flags |= MAF_GSQUERY;
1220 ma->mca_flags &= ~MAF_GSQUERY;
1222 if (!(ma->mca_flags & MAF_GSQUERY) ||
1223 mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs))
1224 igmp6_group_queried(ma, max_delay);
1225 spin_unlock_bh(&ma->mca_lock);
1229 read_unlock_bh(&idev->lock);
1234 /* called with rcu_read_lock() */
1235 int igmp6_event_report(struct sk_buff *skb)
1237 struct ifmcaddr6 *ma;
1238 struct inet6_dev *idev;
1239 struct mld_msg *mld;
1242 /* Our own report looped back. Ignore it. */
1243 if (skb->pkt_type == PACKET_LOOPBACK)
1246 /* send our report if the MC router may not have heard this report */
1247 if (skb->pkt_type != PACKET_MULTICAST &&
1248 skb->pkt_type != PACKET_BROADCAST)
1251 if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr)))
1254 mld = (struct mld_msg *)icmp6_hdr(skb);
1256 /* Drop reports with not link local source */
1257 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
1258 if (addr_type != IPV6_ADDR_ANY &&
1259 !(addr_type&IPV6_ADDR_LINKLOCAL))
1262 idev = __in6_dev_get(skb->dev);
1267 * Cancel the timer for this group
1270 read_lock_bh(&idev->lock);
1271 for (ma = idev->mc_list; ma; ma=ma->next) {
1272 if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) {
1273 spin_lock(&ma->mca_lock);
1274 if (del_timer(&ma->mca_timer))
1275 atomic_dec(&ma->mca_refcnt);
1276 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1277 spin_unlock(&ma->mca_lock);
1281 read_unlock_bh(&idev->lock);
1285 static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1286 int gdeleted, int sdeleted)
1289 case MLD2_MODE_IS_INCLUDE:
1290 case MLD2_MODE_IS_EXCLUDE:
1291 if (gdeleted || sdeleted)
1293 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1294 if (pmc->mca_sfmode == MCAST_INCLUDE)
1296 /* don't include if this source is excluded
1299 if (psf->sf_count[MCAST_INCLUDE])
1300 return type == MLD2_MODE_IS_INCLUDE;
1301 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1302 psf->sf_count[MCAST_EXCLUDE];
1305 case MLD2_CHANGE_TO_INCLUDE:
1306 if (gdeleted || sdeleted)
1308 return psf->sf_count[MCAST_INCLUDE] != 0;
1309 case MLD2_CHANGE_TO_EXCLUDE:
1310 if (gdeleted || sdeleted)
1312 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1313 psf->sf_count[MCAST_INCLUDE])
1315 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1316 psf->sf_count[MCAST_EXCLUDE];
1317 case MLD2_ALLOW_NEW_SOURCES:
1318 if (gdeleted || !psf->sf_crcount)
1320 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1321 case MLD2_BLOCK_OLD_SOURCES:
1322 if (pmc->mca_sfmode == MCAST_INCLUDE)
1323 return gdeleted || (psf->sf_crcount && sdeleted);
1324 return psf->sf_crcount && !gdeleted && !sdeleted;
1330 mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1332 struct ip6_sf_list *psf;
1335 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1336 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1343 static struct sk_buff *mld_newpack(struct net_device *dev, int size)
1345 struct net *net = dev_net(dev);
1346 struct sock *sk = net->ipv6.igmp_sk;
1347 struct sk_buff *skb;
1348 struct mld2_report *pmr;
1349 struct in6_addr addr_buf;
1350 const struct in6_addr *saddr;
1351 int hlen = LL_RESERVED_SPACE(dev);
1352 int tlen = dev->needed_tailroom;
1354 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1355 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1358 /* we assume size > sizeof(ra) here */
1359 size += hlen + tlen;
1360 /* limit our allocations to order-0 page */
1361 size = min_t(int, size, SKB_MAX_ORDER(0, 0));
1362 skb = sock_alloc_send_skb(sk, size, 1, &err);
1367 skb_reserve(skb, hlen);
1369 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1370 /* <draft-ietf-magma-mld-source-05.txt>:
1371 * use unspecified address as the source address
1372 * when a valid link-local address is not available.
1374 saddr = &in6addr_any;
1378 ip6_nd_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0);
1380 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1382 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
1383 skb_put(skb, sizeof(*pmr));
1384 pmr = (struct mld2_report *)skb_transport_header(skb);
1385 pmr->mld2r_type = ICMPV6_MLD2_REPORT;
1386 pmr->mld2r_resv1 = 0;
1387 pmr->mld2r_cksum = 0;
1388 pmr->mld2r_resv2 = 0;
1389 pmr->mld2r_ngrec = 0;
1393 static void mld_sendpack(struct sk_buff *skb)
1395 struct ipv6hdr *pip6 = ipv6_hdr(skb);
1396 struct mld2_report *pmr =
1397 (struct mld2_report *)skb_transport_header(skb);
1398 int payload_len, mldlen;
1399 struct inet6_dev *idev;
1400 struct net *net = dev_net(skb->dev);
1403 struct dst_entry *dst;
1406 idev = __in6_dev_get(skb->dev);
1407 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
1409 payload_len = (skb->tail - skb->network_header) - sizeof(*pip6);
1410 mldlen = skb->tail - skb->transport_header;
1411 pip6->payload_len = htons(payload_len);
1413 pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1415 csum_partial(skb_transport_header(skb),
1418 icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT,
1419 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1421 dst = icmp6_dst_alloc(skb->dev, NULL, &fl6);
1428 skb_dst_set(skb, dst);
1432 payload_len = skb->len;
1434 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1438 ICMP6MSGOUT_INC_STATS_BH(net, idev, ICMPV6_MLD2_REPORT);
1439 ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS);
1440 IP6_UPD_PO_STATS_BH(net, idev, IPSTATS_MIB_OUTMCAST, payload_len);
1442 IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_OUTDISCARDS);
1452 static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1454 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
1457 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1458 int type, struct mld2_grec **ppgr)
1460 struct net_device *dev = pmc->idev->dev;
1461 struct mld2_report *pmr;
1462 struct mld2_grec *pgr;
1465 skb = mld_newpack(dev, dev->mtu);
1468 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1469 pgr->grec_type = type;
1470 pgr->grec_auxwords = 0;
1471 pgr->grec_nsrcs = 0;
1472 pgr->grec_mca = pmc->mca_addr; /* structure copy */
1473 pmr = (struct mld2_report *)skb_transport_header(skb);
1474 pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1);
1479 #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1480 skb_tailroom(skb)) : 0)
1482 static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1483 int type, int gdeleted, int sdeleted)
1485 struct net_device *dev = pmc->idev->dev;
1486 struct mld2_report *pmr;
1487 struct mld2_grec *pgr = NULL;
1488 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
1489 int scount, stotal, first, isquery, truncate;
1491 if (pmc->mca_flags & MAF_NOREPORT)
1494 isquery = type == MLD2_MODE_IS_INCLUDE ||
1495 type == MLD2_MODE_IS_EXCLUDE;
1496 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1497 type == MLD2_CHANGE_TO_EXCLUDE;
1499 stotal = scount = 0;
1501 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1506 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
1508 /* EX and TO_EX get a fresh packet, if needed */
1510 if (pmr && pmr->mld2r_ngrec &&
1511 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1514 skb = mld_newpack(dev, dev->mtu);
1519 for (psf=*psf_list; psf; psf=psf_next) {
1520 struct in6_addr *psrc;
1522 psf_next = psf->sf_next;
1524 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1529 /* clear marks on query responses */
1533 if (AVAILABLE(skb) < sizeof(*psrc) +
1534 first*sizeof(struct mld2_grec)) {
1535 if (truncate && !first)
1536 break; /* truncate these */
1538 pgr->grec_nsrcs = htons(scount);
1541 skb = mld_newpack(dev, dev->mtu);
1546 skb = add_grhead(skb, pmc, type, &pgr);
1551 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1552 *psrc = psf->sf_addr;
1554 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1555 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1557 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1559 psf_prev->sf_next = psf->sf_next;
1561 *psf_list = psf->sf_next;
1571 if (type == MLD2_ALLOW_NEW_SOURCES ||
1572 type == MLD2_BLOCK_OLD_SOURCES)
1574 if (pmc->mca_crcount || isquery) {
1575 /* make sure we have room for group header */
1576 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1578 skb = NULL; /* add_grhead will get a new one */
1580 skb = add_grhead(skb, pmc, type, &pgr);
1584 pgr->grec_nsrcs = htons(scount);
1587 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1591 static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1593 struct sk_buff *skb = NULL;
1597 read_lock_bh(&idev->lock);
1598 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1599 if (pmc->mca_flags & MAF_NOREPORT)
1601 spin_lock_bh(&pmc->mca_lock);
1602 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1603 type = MLD2_MODE_IS_EXCLUDE;
1605 type = MLD2_MODE_IS_INCLUDE;
1606 skb = add_grec(skb, pmc, type, 0, 0);
1607 spin_unlock_bh(&pmc->mca_lock);
1609 read_unlock_bh(&idev->lock);
1611 spin_lock_bh(&pmc->mca_lock);
1612 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1613 type = MLD2_MODE_IS_EXCLUDE;
1615 type = MLD2_MODE_IS_INCLUDE;
1616 skb = add_grec(skb, pmc, type, 0, 0);
1617 spin_unlock_bh(&pmc->mca_lock);
1624 * remove zero-count source records from a source filter list
1626 static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1628 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1631 for (psf=*ppsf; psf; psf = psf_next) {
1632 psf_next = psf->sf_next;
1633 if (psf->sf_crcount == 0) {
1635 psf_prev->sf_next = psf->sf_next;
1637 *ppsf = psf->sf_next;
1644 static void mld_send_cr(struct inet6_dev *idev)
1646 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1647 struct sk_buff *skb = NULL;
1650 read_lock_bh(&idev->lock);
1651 spin_lock(&idev->mc_lock);
1655 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1656 pmc_next = pmc->next;
1657 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1658 type = MLD2_BLOCK_OLD_SOURCES;
1659 dtype = MLD2_BLOCK_OLD_SOURCES;
1660 skb = add_grec(skb, pmc, type, 1, 0);
1661 skb = add_grec(skb, pmc, dtype, 1, 1);
1663 if (pmc->mca_crcount) {
1664 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1665 type = MLD2_CHANGE_TO_INCLUDE;
1666 skb = add_grec(skb, pmc, type, 1, 0);
1669 if (pmc->mca_crcount == 0) {
1670 mld_clear_zeros(&pmc->mca_tomb);
1671 mld_clear_zeros(&pmc->mca_sources);
1674 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1675 !pmc->mca_sources) {
1677 pmc_prev->next = pmc_next;
1679 idev->mc_tomb = pmc_next;
1680 in6_dev_put(pmc->idev);
1685 spin_unlock(&idev->mc_lock);
1688 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1689 spin_lock_bh(&pmc->mca_lock);
1690 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1691 type = MLD2_BLOCK_OLD_SOURCES;
1692 dtype = MLD2_ALLOW_NEW_SOURCES;
1694 type = MLD2_ALLOW_NEW_SOURCES;
1695 dtype = MLD2_BLOCK_OLD_SOURCES;
1697 skb = add_grec(skb, pmc, type, 0, 0);
1698 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1700 /* filter mode changes */
1701 if (pmc->mca_crcount) {
1702 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1703 type = MLD2_CHANGE_TO_EXCLUDE;
1705 type = MLD2_CHANGE_TO_INCLUDE;
1706 skb = add_grec(skb, pmc, type, 0, 0);
1709 spin_unlock_bh(&pmc->mca_lock);
1711 read_unlock_bh(&idev->lock);
1714 (void) mld_sendpack(skb);
1717 static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1719 struct net *net = dev_net(dev);
1720 struct sock *sk = net->ipv6.igmp_sk;
1721 struct inet6_dev *idev;
1722 struct sk_buff *skb;
1723 struct mld_msg *hdr;
1724 const struct in6_addr *snd_addr, *saddr;
1725 struct in6_addr addr_buf;
1726 int hlen = LL_RESERVED_SPACE(dev);
1727 int tlen = dev->needed_tailroom;
1728 int err, len, payload_len, full_len;
1729 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1730 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1733 struct dst_entry *dst;
1735 if (type == ICMPV6_MGM_REDUCTION)
1736 snd_addr = &in6addr_linklocal_allrouters;
1740 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1741 payload_len = len + sizeof(ra);
1742 full_len = sizeof(struct ipv6hdr) + payload_len;
1745 IP6_UPD_PO_STATS(net, __in6_dev_get(dev),
1746 IPSTATS_MIB_OUT, full_len);
1749 skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err);
1753 IP6_INC_STATS(net, __in6_dev_get(dev),
1754 IPSTATS_MIB_OUTDISCARDS);
1759 skb_reserve(skb, hlen);
1761 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1762 /* <draft-ietf-magma-mld-source-05.txt>:
1763 * use unspecified address as the source address
1764 * when a valid link-local address is not available.
1766 saddr = &in6addr_any;
1770 ip6_nd_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len);
1772 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1774 hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg));
1775 memset(hdr, 0, sizeof(struct mld_msg));
1776 hdr->mld_type = type;
1777 hdr->mld_mca = *addr;
1779 hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len,
1781 csum_partial(hdr, len, 0));
1784 idev = __in6_dev_get(skb->dev);
1786 icmpv6_flow_init(sk, &fl6, type,
1787 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1789 dst = icmp6_dst_alloc(skb->dev, NULL, &fl6);
1795 skb_dst_set(skb, dst);
1796 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1800 ICMP6MSGOUT_INC_STATS(net, idev, type);
1801 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
1802 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len);
1804 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
1814 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
1815 const struct in6_addr *psfsrc)
1817 struct ip6_sf_list *psf, *psf_prev;
1821 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1822 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1826 if (!psf || psf->sf_count[sfmode] == 0) {
1827 /* source filter not found, or count wrong => bug */
1830 psf->sf_count[sfmode]--;
1831 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1832 struct inet6_dev *idev = pmc->idev;
1834 /* no more filters for this source */
1836 psf_prev->sf_next = psf->sf_next;
1838 pmc->mca_sources = psf->sf_next;
1839 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1840 !MLD_V1_SEEN(idev)) {
1841 psf->sf_crcount = idev->mc_qrv;
1842 psf->sf_next = pmc->mca_tomb;
1843 pmc->mca_tomb = psf;
1851 static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
1852 int sfmode, int sfcount, const struct in6_addr *psfsrc,
1855 struct ifmcaddr6 *pmc;
1861 read_lock_bh(&idev->lock);
1862 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1863 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1867 /* MCA not found?? bug */
1868 read_unlock_bh(&idev->lock);
1871 spin_lock_bh(&pmc->mca_lock);
1874 if (!pmc->mca_sfcount[sfmode]) {
1875 spin_unlock_bh(&pmc->mca_lock);
1876 read_unlock_bh(&idev->lock);
1879 pmc->mca_sfcount[sfmode]--;
1882 for (i=0; i<sfcount; i++) {
1883 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1885 changerec |= rv > 0;
1889 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1890 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1891 pmc->mca_sfcount[MCAST_INCLUDE]) {
1892 struct ip6_sf_list *psf;
1894 /* filter mode change */
1895 pmc->mca_sfmode = MCAST_INCLUDE;
1896 pmc->mca_crcount = idev->mc_qrv;
1897 idev->mc_ifc_count = pmc->mca_crcount;
1898 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1899 psf->sf_crcount = 0;
1900 mld_ifc_event(pmc->idev);
1901 } else if (sf_setstate(pmc) || changerec)
1902 mld_ifc_event(pmc->idev);
1903 spin_unlock_bh(&pmc->mca_lock);
1904 read_unlock_bh(&idev->lock);
1909 * Add multicast single-source filter to the interface list
1911 static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
1912 const struct in6_addr *psfsrc)
1914 struct ip6_sf_list *psf, *psf_prev;
1917 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1918 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1923 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
1927 psf->sf_addr = *psfsrc;
1929 psf_prev->sf_next = psf;
1931 pmc->mca_sources = psf;
1933 psf->sf_count[sfmode]++;
1937 static void sf_markstate(struct ifmcaddr6 *pmc)
1939 struct ip6_sf_list *psf;
1940 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1942 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1943 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1944 psf->sf_oldin = mca_xcount ==
1945 psf->sf_count[MCAST_EXCLUDE] &&
1946 !psf->sf_count[MCAST_INCLUDE];
1948 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
1951 static int sf_setstate(struct ifmcaddr6 *pmc)
1953 struct ip6_sf_list *psf, *dpsf;
1954 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1955 int qrv = pmc->idev->mc_qrv;
1959 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1960 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1961 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
1962 !psf->sf_count[MCAST_INCLUDE];
1964 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
1966 if (!psf->sf_oldin) {
1967 struct ip6_sf_list *prev = NULL;
1969 for (dpsf=pmc->mca_tomb; dpsf;
1970 dpsf=dpsf->sf_next) {
1971 if (ipv6_addr_equal(&dpsf->sf_addr,
1978 prev->sf_next = dpsf->sf_next;
1980 pmc->mca_tomb = dpsf->sf_next;
1983 psf->sf_crcount = qrv;
1986 } else if (psf->sf_oldin) {
1987 psf->sf_crcount = 0;
1989 * add or update "delete" records if an active filter
1992 for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
1993 if (ipv6_addr_equal(&dpsf->sf_addr,
1997 dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
2001 /* pmc->mca_lock held by callers */
2002 dpsf->sf_next = pmc->mca_tomb;
2003 pmc->mca_tomb = dpsf;
2005 dpsf->sf_crcount = qrv;
2013 * Add multicast source filter list to the interface list
2015 static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2016 int sfmode, int sfcount, const struct in6_addr *psfsrc,
2019 struct ifmcaddr6 *pmc;
2025 read_lock_bh(&idev->lock);
2026 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2027 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2031 /* MCA not found?? bug */
2032 read_unlock_bh(&idev->lock);
2035 spin_lock_bh(&pmc->mca_lock);
2038 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2040 pmc->mca_sfcount[sfmode]++;
2042 for (i=0; i<sfcount; i++) {
2043 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]);
2051 pmc->mca_sfcount[sfmode]--;
2053 ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]);
2054 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
2055 struct ip6_sf_list *psf;
2057 /* filter mode change */
2058 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2059 pmc->mca_sfmode = MCAST_EXCLUDE;
2060 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2061 pmc->mca_sfmode = MCAST_INCLUDE;
2062 /* else no filters; keep old mode for reports */
2064 pmc->mca_crcount = idev->mc_qrv;
2065 idev->mc_ifc_count = pmc->mca_crcount;
2066 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2067 psf->sf_crcount = 0;
2068 mld_ifc_event(idev);
2069 } else if (sf_setstate(pmc))
2070 mld_ifc_event(idev);
2071 spin_unlock_bh(&pmc->mca_lock);
2072 read_unlock_bh(&idev->lock);
2076 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2078 struct ip6_sf_list *psf, *nextpsf;
2080 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
2081 nextpsf = psf->sf_next;
2084 pmc->mca_tomb = NULL;
2085 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
2086 nextpsf = psf->sf_next;
2089 pmc->mca_sources = NULL;
2090 pmc->mca_sfmode = MCAST_EXCLUDE;
2091 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
2092 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2096 static void igmp6_join_group(struct ifmcaddr6 *ma)
2098 unsigned long delay;
2100 if (ma->mca_flags & MAF_NOREPORT)
2103 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2105 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
2107 spin_lock_bh(&ma->mca_lock);
2108 if (del_timer(&ma->mca_timer)) {
2109 atomic_dec(&ma->mca_refcnt);
2110 delay = ma->mca_timer.expires - jiffies;
2113 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2114 atomic_inc(&ma->mca_refcnt);
2115 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2116 spin_unlock_bh(&ma->mca_lock);
2119 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2120 struct inet6_dev *idev)
2124 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2125 * so no other readers or writers of iml or its sflist
2128 /* any-source empty exclude case */
2129 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2131 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2132 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2133 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2138 static void igmp6_leave_group(struct ifmcaddr6 *ma)
2140 if (MLD_V1_SEEN(ma->idev)) {
2141 if (ma->mca_flags & MAF_LAST_REPORTER)
2142 igmp6_send(&ma->mca_addr, ma->idev->dev,
2143 ICMPV6_MGM_REDUCTION);
2145 mld_add_delrec(ma->idev, ma);
2146 mld_ifc_event(ma->idev);
2150 static void mld_gq_timer_expire(unsigned long data)
2152 struct inet6_dev *idev = (struct inet6_dev *)data;
2154 idev->mc_gq_running = 0;
2155 mld_send_report(idev, NULL);
2156 __in6_dev_put(idev);
2159 static void mld_ifc_timer_expire(unsigned long data)
2161 struct inet6_dev *idev = (struct inet6_dev *)data;
2164 if (idev->mc_ifc_count) {
2165 idev->mc_ifc_count--;
2166 if (idev->mc_ifc_count)
2167 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2169 __in6_dev_put(idev);
2172 static void mld_ifc_event(struct inet6_dev *idev)
2174 if (MLD_V1_SEEN(idev))
2176 idev->mc_ifc_count = idev->mc_qrv;
2177 mld_ifc_start_timer(idev, 1);
2181 static void igmp6_timer_handler(unsigned long data)
2183 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2185 if (MLD_V1_SEEN(ma->idev))
2186 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2188 mld_send_report(ma->idev, ma);
2190 spin_lock(&ma->mca_lock);
2191 ma->mca_flags |= MAF_LAST_REPORTER;
2192 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2193 spin_unlock(&ma->mca_lock);
2197 /* Device changing type */
2199 void ipv6_mc_unmap(struct inet6_dev *idev)
2201 struct ifmcaddr6 *i;
2203 /* Install multicast list, except for all-nodes (already installed) */
2205 read_lock_bh(&idev->lock);
2206 for (i = idev->mc_list; i; i = i->next)
2207 igmp6_group_dropped(i);
2208 read_unlock_bh(&idev->lock);
2211 void ipv6_mc_remap(struct inet6_dev *idev)
2216 /* Device going down */
2218 void ipv6_mc_down(struct inet6_dev *idev)
2220 struct ifmcaddr6 *i;
2222 /* Withdraw multicast list */
2224 read_lock_bh(&idev->lock);
2225 idev->mc_ifc_count = 0;
2226 if (del_timer(&idev->mc_ifc_timer))
2227 __in6_dev_put(idev);
2228 idev->mc_gq_running = 0;
2229 if (del_timer(&idev->mc_gq_timer))
2230 __in6_dev_put(idev);
2232 for (i = idev->mc_list; i; i=i->next)
2233 igmp6_group_dropped(i);
2234 read_unlock_bh(&idev->lock);
2236 mld_clear_delrec(idev);
2240 /* Device going up */
2242 void ipv6_mc_up(struct inet6_dev *idev)
2244 struct ifmcaddr6 *i;
2246 /* Install multicast list, except for all-nodes (already installed) */
2248 read_lock_bh(&idev->lock);
2249 for (i = idev->mc_list; i; i=i->next)
2250 igmp6_group_added(i);
2251 read_unlock_bh(&idev->lock);
2254 /* IPv6 device initialization. */
2256 void ipv6_mc_init_dev(struct inet6_dev *idev)
2258 write_lock_bh(&idev->lock);
2259 spin_lock_init(&idev->mc_lock);
2260 idev->mc_gq_running = 0;
2261 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2262 (unsigned long)idev);
2263 idev->mc_tomb = NULL;
2264 idev->mc_ifc_count = 0;
2265 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2266 (unsigned long)idev);
2267 idev->mc_qrv = MLD_QRV_DEFAULT;
2268 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2269 idev->mc_v1_seen = 0;
2270 write_unlock_bh(&idev->lock);
2274 * Device is about to be destroyed: clean up.
2277 void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2279 struct ifmcaddr6 *i;
2281 /* Deactivate timers */
2284 /* Delete all-nodes address. */
2285 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2286 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2289 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes);
2291 if (idev->cnf.forwarding)
2292 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters);
2294 write_lock_bh(&idev->lock);
2295 while ((i = idev->mc_list) != NULL) {
2296 idev->mc_list = i->next;
2297 write_unlock_bh(&idev->lock);
2299 igmp6_group_dropped(i);
2302 write_lock_bh(&idev->lock);
2304 write_unlock_bh(&idev->lock);
2307 #ifdef CONFIG_PROC_FS
2308 struct igmp6_mc_iter_state {
2309 struct seq_net_private p;
2310 struct net_device *dev;
2311 struct inet6_dev *idev;
2314 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2316 static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2318 struct ifmcaddr6 *im = NULL;
2319 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2320 struct net *net = seq_file_net(seq);
2323 for_each_netdev_rcu(net, state->dev) {
2324 struct inet6_dev *idev;
2325 idev = __in6_dev_get(state->dev);
2328 read_lock_bh(&idev->lock);
2334 read_unlock_bh(&idev->lock);
2339 static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2341 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2345 if (likely(state->idev != NULL))
2346 read_unlock_bh(&state->idev->lock);
2348 state->dev = next_net_device_rcu(state->dev);
2353 state->idev = __in6_dev_get(state->dev);
2356 read_lock_bh(&state->idev->lock);
2357 im = state->idev->mc_list;
2362 static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2364 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2366 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2368 return pos ? NULL : im;
2371 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
2375 return igmp6_mc_get_idx(seq, *pos);
2378 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2380 struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v);
2386 static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
2389 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2391 if (likely(state->idev != NULL)) {
2392 read_unlock_bh(&state->idev->lock);
2399 static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2401 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2402 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2405 "%-4d %-15s %pi6 %5d %08X %ld\n",
2406 state->dev->ifindex, state->dev->name,
2408 im->mca_users, im->mca_flags,
2409 (im->mca_flags&MAF_TIMER_RUNNING) ?
2410 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2414 static const struct seq_operations igmp6_mc_seq_ops = {
2415 .start = igmp6_mc_seq_start,
2416 .next = igmp6_mc_seq_next,
2417 .stop = igmp6_mc_seq_stop,
2418 .show = igmp6_mc_seq_show,
2421 static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2423 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2424 sizeof(struct igmp6_mc_iter_state));
2427 static const struct file_operations igmp6_mc_seq_fops = {
2428 .owner = THIS_MODULE,
2429 .open = igmp6_mc_seq_open,
2431 .llseek = seq_lseek,
2432 .release = seq_release_net,
2435 struct igmp6_mcf_iter_state {
2436 struct seq_net_private p;
2437 struct net_device *dev;
2438 struct inet6_dev *idev;
2439 struct ifmcaddr6 *im;
2442 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2444 static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2446 struct ip6_sf_list *psf = NULL;
2447 struct ifmcaddr6 *im = NULL;
2448 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2449 struct net *net = seq_file_net(seq);
2453 for_each_netdev_rcu(net, state->dev) {
2454 struct inet6_dev *idev;
2455 idev = __in6_dev_get(state->dev);
2456 if (unlikely(idev == NULL))
2458 read_lock_bh(&idev->lock);
2460 if (likely(im != NULL)) {
2461 spin_lock_bh(&im->mca_lock);
2462 psf = im->mca_sources;
2463 if (likely(psf != NULL)) {
2468 spin_unlock_bh(&im->mca_lock);
2470 read_unlock_bh(&idev->lock);
2475 static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2477 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2481 spin_unlock_bh(&state->im->mca_lock);
2482 state->im = state->im->next;
2483 while (!state->im) {
2484 if (likely(state->idev != NULL))
2485 read_unlock_bh(&state->idev->lock);
2487 state->dev = next_net_device_rcu(state->dev);
2492 state->idev = __in6_dev_get(state->dev);
2495 read_lock_bh(&state->idev->lock);
2496 state->im = state->idev->mc_list;
2500 spin_lock_bh(&state->im->mca_lock);
2501 psf = state->im->mca_sources;
2507 static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2509 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2511 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2513 return pos ? NULL : psf;
2516 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
2520 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2523 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2525 struct ip6_sf_list *psf;
2526 if (v == SEQ_START_TOKEN)
2527 psf = igmp6_mcf_get_first(seq);
2529 psf = igmp6_mcf_get_next(seq, v);
2534 static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
2537 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2538 if (likely(state->im != NULL)) {
2539 spin_unlock_bh(&state->im->mca_lock);
2542 if (likely(state->idev != NULL)) {
2543 read_unlock_bh(&state->idev->lock);
2550 static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2552 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2553 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2555 if (v == SEQ_START_TOKEN) {
2558 "%32s %32s %6s %6s\n", "Idx",
2559 "Device", "Multicast Address",
2560 "Source Address", "INC", "EXC");
2563 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
2564 state->dev->ifindex, state->dev->name,
2565 &state->im->mca_addr,
2567 psf->sf_count[MCAST_INCLUDE],
2568 psf->sf_count[MCAST_EXCLUDE]);
2573 static const struct seq_operations igmp6_mcf_seq_ops = {
2574 .start = igmp6_mcf_seq_start,
2575 .next = igmp6_mcf_seq_next,
2576 .stop = igmp6_mcf_seq_stop,
2577 .show = igmp6_mcf_seq_show,
2580 static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2582 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2583 sizeof(struct igmp6_mcf_iter_state));
2586 static const struct file_operations igmp6_mcf_seq_fops = {
2587 .owner = THIS_MODULE,
2588 .open = igmp6_mcf_seq_open,
2590 .llseek = seq_lseek,
2591 .release = seq_release_net,
2594 static int __net_init igmp6_proc_init(struct net *net)
2599 if (!proc_net_fops_create(net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops))
2601 if (!proc_net_fops_create(net, "mcfilter6", S_IRUGO,
2602 &igmp6_mcf_seq_fops))
2603 goto out_proc_net_igmp6;
2610 proc_net_remove(net, "igmp6");
2614 static void __net_exit igmp6_proc_exit(struct net *net)
2616 proc_net_remove(net, "mcfilter6");
2617 proc_net_remove(net, "igmp6");
2620 static inline int igmp6_proc_init(struct net *net)
2624 static inline void igmp6_proc_exit(struct net *net)
2629 static int __net_init igmp6_net_init(struct net *net)
2633 err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
2634 SOCK_RAW, IPPROTO_ICMPV6, net);
2636 pr_err("Failed to initialize the IGMP6 control socket (err %d)\n",
2641 inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
2643 err = igmp6_proc_init(net);
2645 goto out_sock_create;
2650 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2654 static void __net_exit igmp6_net_exit(struct net *net)
2656 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2657 igmp6_proc_exit(net);
2660 static struct pernet_operations igmp6_net_ops = {
2661 .init = igmp6_net_init,
2662 .exit = igmp6_net_exit,
2665 int __init igmp6_init(void)
2667 return register_pernet_subsys(&igmp6_net_ops);
2670 void igmp6_cleanup(void)
2672 unregister_pernet_subsys(&igmp6_net_ops);