2 * Multicast support for IPv6
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * $Id: mcast.c,v 1.40 2002/02/08 03:57:19 davem Exp $
10 * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
20 * yoshfuji : fix format of router-alert option
21 * YOSHIFUJI Hideaki @USAGI:
22 * Fixed source address for MLD message based on
23 * <draft-ietf-magma-mld-source-05.txt>.
24 * YOSHIFUJI Hideaki @USAGI:
25 * - Ignore Queries for invalid addresses.
26 * - MLD for link-local addresses.
27 * David L Stevens <dlstevens@us.ibm.com>:
31 #include <linux/module.h>
32 #include <linux/errno.h>
33 #include <linux/types.h>
34 #include <linux/string.h>
35 #include <linux/socket.h>
36 #include <linux/sockios.h>
37 #include <linux/jiffies.h>
38 #include <linux/times.h>
39 #include <linux/net.h>
41 #include <linux/in6.h>
42 #include <linux/netdevice.h>
43 #include <linux/if_arp.h>
44 #include <linux/route.h>
45 #include <linux/init.h>
46 #include <linux/proc_fs.h>
47 #include <linux/seq_file.h>
49 #include <linux/netfilter.h>
50 #include <linux/netfilter_ipv6.h>
52 #include <net/net_namespace.h>
57 #include <net/protocol.h>
58 #include <net/if_inet6.h>
59 #include <net/ndisc.h>
60 #include <net/addrconf.h>
61 #include <net/ip6_route.h>
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
76 * These header formats should be in a separate include file, but icmpv6.h
77 * doesn't have in6_addr defined in all cases, there is no __u128, and no
78 * other files reference these.
83 /* Multicast Listener Discovery version 2 headers */
89 struct in6_addr grec_mca;
90 struct in6_addr grec_src[0];
99 struct mld2_grec grec[0];
109 #if defined(__LITTLE_ENDIAN_BITFIELD)
113 #elif defined(__BIG_ENDIAN_BITFIELD)
118 #error "Please fix <asm/byteorder.h>"
122 struct in6_addr srcs[0];
125 static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
127 /* Big mc list lock for all the sockets */
128 static DEFINE_RWLOCK(ipv6_sk_mc_lock);
130 int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
132 static void igmp6_join_group(struct ifmcaddr6 *ma);
133 static void igmp6_leave_group(struct ifmcaddr6 *ma);
134 static void igmp6_timer_handler(unsigned long data);
136 static void mld_gq_timer_expire(unsigned long data);
137 static void mld_ifc_timer_expire(unsigned long data);
138 static void mld_ifc_event(struct inet6_dev *idev);
139 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
140 static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr);
141 static void mld_clear_delrec(struct inet6_dev *idev);
142 static int sf_setstate(struct ifmcaddr6 *pmc);
143 static void sf_markstate(struct ifmcaddr6 *pmc);
144 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
145 static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
146 int sfmode, int sfcount, struct in6_addr *psfsrc,
148 static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
149 int sfmode, int sfcount, struct in6_addr *psfsrc,
151 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
152 struct inet6_dev *idev);
155 #define IGMP6_UNSOLICITED_IVAL (10*HZ)
156 #define MLD_QRV_DEFAULT 2
158 #define MLD_V1_SEEN(idev) (ipv6_devconf.force_mld_version == 1 || \
159 (idev)->cnf.force_mld_version == 1 || \
160 ((idev)->mc_v1_seen && \
161 time_before(jiffies, (idev)->mc_v1_seen)))
163 #define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
164 #define MLDV2_EXP(thresh, nbmant, nbexp, value) \
165 ((value) < (thresh) ? (value) : \
166 ((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \
167 (MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
169 #define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value)
170 #define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
172 #define IPV6_MLD_MAX_MSF 64
174 int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
177 * socket join on multicast group
180 int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr)
182 struct net_device *dev = NULL;
183 struct ipv6_mc_socklist *mc_lst;
184 struct ipv6_pinfo *np = inet6_sk(sk);
185 struct net *net = sock_net(sk);
188 if (!ipv6_addr_is_multicast(addr))
191 read_lock_bh(&ipv6_sk_mc_lock);
192 for (mc_lst=np->ipv6_mc_list; mc_lst; mc_lst=mc_lst->next) {
193 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
194 ipv6_addr_equal(&mc_lst->addr, addr)) {
195 read_unlock_bh(&ipv6_sk_mc_lock);
199 read_unlock_bh(&ipv6_sk_mc_lock);
201 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
207 ipv6_addr_copy(&mc_lst->addr, addr);
211 rt = rt6_lookup(net, addr, NULL, 0, 0);
215 dst_release(&rt->u.dst);
218 dev = dev_get_by_index(net, ifindex);
221 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
225 mc_lst->ifindex = dev->ifindex;
226 mc_lst->sfmode = MCAST_EXCLUDE;
227 rwlock_init(&mc_lst->sflock);
228 mc_lst->sflist = NULL;
231 * now add/increase the group membership on the device
234 err = ipv6_dev_mc_inc(dev, addr);
237 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
242 write_lock_bh(&ipv6_sk_mc_lock);
243 mc_lst->next = np->ipv6_mc_list;
244 np->ipv6_mc_list = mc_lst;
245 write_unlock_bh(&ipv6_sk_mc_lock);
253 * socket leave on multicast group
255 int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
257 struct ipv6_pinfo *np = inet6_sk(sk);
258 struct ipv6_mc_socklist *mc_lst, **lnk;
259 struct net *net = sock_net(sk);
261 write_lock_bh(&ipv6_sk_mc_lock);
262 for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) {
263 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
264 ipv6_addr_equal(&mc_lst->addr, addr)) {
265 struct net_device *dev;
268 write_unlock_bh(&ipv6_sk_mc_lock);
270 dev = dev_get_by_index(net, mc_lst->ifindex);
272 struct inet6_dev *idev = in6_dev_get(dev);
274 (void) ip6_mc_leave_src(sk, mc_lst, idev);
276 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
281 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
282 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
286 write_unlock_bh(&ipv6_sk_mc_lock);
288 return -EADDRNOTAVAIL;
291 static struct inet6_dev *ip6_mc_find_dev(struct net *net,
292 struct in6_addr *group,
295 struct net_device *dev = NULL;
296 struct inet6_dev *idev = NULL;
301 rt = rt6_lookup(net, group, NULL, 0, 0);
305 dst_release(&rt->u.dst);
308 dev = dev_get_by_index(net, ifindex);
312 idev = in6_dev_get(dev);
317 read_lock_bh(&idev->lock);
319 read_unlock_bh(&idev->lock);
327 void ipv6_sock_mc_close(struct sock *sk)
329 struct ipv6_pinfo *np = inet6_sk(sk);
330 struct ipv6_mc_socklist *mc_lst;
331 struct net *net = sock_net(sk);
333 write_lock_bh(&ipv6_sk_mc_lock);
334 while ((mc_lst = np->ipv6_mc_list) != NULL) {
335 struct net_device *dev;
337 np->ipv6_mc_list = mc_lst->next;
338 write_unlock_bh(&ipv6_sk_mc_lock);
340 dev = dev_get_by_index(net, mc_lst->ifindex);
342 struct inet6_dev *idev = in6_dev_get(dev);
344 (void) ip6_mc_leave_src(sk, mc_lst, idev);
346 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
351 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
353 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
355 write_lock_bh(&ipv6_sk_mc_lock);
357 write_unlock_bh(&ipv6_sk_mc_lock);
360 int ip6_mc_source(int add, int omode, struct sock *sk,
361 struct group_source_req *pgsr)
363 struct in6_addr *source, *group;
364 struct ipv6_mc_socklist *pmc;
365 struct net_device *dev;
366 struct inet6_dev *idev;
367 struct ipv6_pinfo *inet6 = inet6_sk(sk);
368 struct ip6_sf_socklist *psl;
369 struct net *net = sock_net(sk);
375 if (pgsr->gsr_group.ss_family != AF_INET6 ||
376 pgsr->gsr_source.ss_family != AF_INET6)
379 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
380 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
382 if (!ipv6_addr_is_multicast(group))
385 idev = ip6_mc_find_dev(net, group, pgsr->gsr_interface);
390 err = -EADDRNOTAVAIL;
392 read_lock_bh(&ipv6_sk_mc_lock);
393 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
394 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
396 if (ipv6_addr_equal(&pmc->addr, group))
399 if (!pmc) { /* must have a prior join */
403 /* if a source filter was set, must be the same mode as before */
405 if (pmc->sfmode != omode) {
409 } else if (pmc->sfmode != omode) {
410 /* allow mode switches for empty-set filters */
411 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
412 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
416 write_lock_bh(&pmc->sflock);
422 goto done; /* err = -EADDRNOTAVAIL */
424 for (i=0; i<psl->sl_count; i++) {
425 rv = memcmp(&psl->sl_addr[i], source,
426 sizeof(struct in6_addr));
430 if (rv) /* source not found */
431 goto done; /* err = -EADDRNOTAVAIL */
433 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
434 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
439 /* update the interface filter */
440 ip6_mc_del_src(idev, group, omode, 1, source, 1);
442 for (j=i+1; j<psl->sl_count; j++)
443 psl->sl_addr[j-1] = psl->sl_addr[j];
448 /* else, add a new source to the filter */
450 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
454 if (!psl || psl->sl_count == psl->sl_max) {
455 struct ip6_sf_socklist *newpsl;
456 int count = IP6_SFBLOCK;
459 count += psl->sl_max;
460 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
465 newpsl->sl_max = count;
466 newpsl->sl_count = count - IP6_SFBLOCK;
468 for (i=0; i<psl->sl_count; i++)
469 newpsl->sl_addr[i] = psl->sl_addr[i];
470 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
472 pmc->sflist = psl = newpsl;
474 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
475 for (i=0; i<psl->sl_count; i++) {
476 rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr));
480 if (rv == 0) /* address already there is an error */
482 for (j=psl->sl_count-1; j>=i; j--)
483 psl->sl_addr[j+1] = psl->sl_addr[j];
484 psl->sl_addr[i] = *source;
487 /* update the interface list */
488 ip6_mc_add_src(idev, group, omode, 1, source, 1);
491 write_unlock_bh(&pmc->sflock);
492 read_unlock_bh(&ipv6_sk_mc_lock);
493 read_unlock_bh(&idev->lock);
497 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
501 int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
503 struct in6_addr *group;
504 struct ipv6_mc_socklist *pmc;
505 struct net_device *dev;
506 struct inet6_dev *idev;
507 struct ipv6_pinfo *inet6 = inet6_sk(sk);
508 struct ip6_sf_socklist *newpsl, *psl;
509 struct net *net = sock_net(sk);
513 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
515 if (!ipv6_addr_is_multicast(group))
517 if (gsf->gf_fmode != MCAST_INCLUDE &&
518 gsf->gf_fmode != MCAST_EXCLUDE)
521 idev = ip6_mc_find_dev(net, group, gsf->gf_interface);
528 read_lock_bh(&ipv6_sk_mc_lock);
530 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
535 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
536 if (pmc->ifindex != gsf->gf_interface)
538 if (ipv6_addr_equal(&pmc->addr, group))
541 if (!pmc) { /* must have a prior join */
545 if (gsf->gf_numsrc) {
546 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
552 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
553 for (i=0; i<newpsl->sl_count; ++i) {
554 struct sockaddr_in6 *psin6;
556 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
557 newpsl->sl_addr[i] = psin6->sin6_addr;
559 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
560 newpsl->sl_count, newpsl->sl_addr, 0);
562 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
567 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
570 write_lock_bh(&pmc->sflock);
573 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
574 psl->sl_count, psl->sl_addr, 0);
575 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
577 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
578 pmc->sflist = newpsl;
579 pmc->sfmode = gsf->gf_fmode;
580 write_unlock_bh(&pmc->sflock);
583 read_unlock_bh(&ipv6_sk_mc_lock);
584 read_unlock_bh(&idev->lock);
588 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
592 int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
593 struct group_filter __user *optval, int __user *optlen)
595 int err, i, count, copycount;
596 struct in6_addr *group;
597 struct ipv6_mc_socklist *pmc;
598 struct inet6_dev *idev;
599 struct net_device *dev;
600 struct ipv6_pinfo *inet6 = inet6_sk(sk);
601 struct ip6_sf_socklist *psl;
602 struct net *net = sock_net(sk);
604 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
606 if (!ipv6_addr_is_multicast(group))
609 idev = ip6_mc_find_dev(net, group, gsf->gf_interface);
616 err = -EADDRNOTAVAIL;
618 * changes to the ipv6_mc_list require the socket lock and
619 * a read lock on ip6_sk_mc_lock. We have the socket lock,
620 * so reading the list is safe.
623 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
624 if (pmc->ifindex != gsf->gf_interface)
626 if (ipv6_addr_equal(group, &pmc->addr))
629 if (!pmc) /* must have a prior join */
631 gsf->gf_fmode = pmc->sfmode;
633 count = psl ? psl->sl_count : 0;
634 read_unlock_bh(&idev->lock);
638 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
639 gsf->gf_numsrc = count;
640 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
641 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
644 /* changes to psl require the socket lock, a read lock on
645 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
646 * have the socket lock, so reading here is safe.
648 for (i=0; i<copycount; i++) {
649 struct sockaddr_in6 *psin6;
650 struct sockaddr_storage ss;
652 psin6 = (struct sockaddr_in6 *)&ss;
653 memset(&ss, 0, sizeof(ss));
654 psin6->sin6_family = AF_INET6;
655 psin6->sin6_addr = psl->sl_addr[i];
656 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
661 read_unlock_bh(&idev->lock);
667 int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
668 struct in6_addr *src_addr)
670 struct ipv6_pinfo *np = inet6_sk(sk);
671 struct ipv6_mc_socklist *mc;
672 struct ip6_sf_socklist *psl;
675 read_lock(&ipv6_sk_mc_lock);
676 for (mc = np->ipv6_mc_list; mc; mc = mc->next) {
677 if (ipv6_addr_equal(&mc->addr, mc_addr))
681 read_unlock(&ipv6_sk_mc_lock);
684 read_lock(&mc->sflock);
687 rv = mc->sfmode == MCAST_EXCLUDE;
691 for (i=0; i<psl->sl_count; i++) {
692 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
695 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
697 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
700 read_unlock(&mc->sflock);
701 read_unlock(&ipv6_sk_mc_lock);
706 static void ma_put(struct ifmcaddr6 *mc)
708 if (atomic_dec_and_test(&mc->mca_refcnt)) {
709 in6_dev_put(mc->idev);
714 static void igmp6_group_added(struct ifmcaddr6 *mc)
716 struct net_device *dev = mc->idev->dev;
717 char buf[MAX_ADDR_LEN];
719 spin_lock_bh(&mc->mca_lock);
720 if (!(mc->mca_flags&MAF_LOADED)) {
721 mc->mca_flags |= MAF_LOADED;
722 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
723 dev_mc_add(dev, buf, dev->addr_len, 0);
725 spin_unlock_bh(&mc->mca_lock);
727 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
730 if (MLD_V1_SEEN(mc->idev)) {
731 igmp6_join_group(mc);
736 mc->mca_crcount = mc->idev->mc_qrv;
737 mld_ifc_event(mc->idev);
740 static void igmp6_group_dropped(struct ifmcaddr6 *mc)
742 struct net_device *dev = mc->idev->dev;
743 char buf[MAX_ADDR_LEN];
745 spin_lock_bh(&mc->mca_lock);
746 if (mc->mca_flags&MAF_LOADED) {
747 mc->mca_flags &= ~MAF_LOADED;
748 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
749 dev_mc_delete(dev, buf, dev->addr_len, 0);
752 if (mc->mca_flags & MAF_NOREPORT)
754 spin_unlock_bh(&mc->mca_lock);
757 igmp6_leave_group(mc);
759 spin_lock_bh(&mc->mca_lock);
760 if (del_timer(&mc->mca_timer))
761 atomic_dec(&mc->mca_refcnt);
763 ip6_mc_clear_src(mc);
764 spin_unlock_bh(&mc->mca_lock);
768 * deleted ifmcaddr6 manipulation
770 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
772 struct ifmcaddr6 *pmc;
774 /* this is an "ifmcaddr6" for convenience; only the fields below
775 * are actually used. In particular, the refcnt and users are not
776 * used for management of the delete list. Using the same structure
777 * for deleted items allows change reports to use common code with
778 * non-deleted or query-response MCA's.
780 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
784 spin_lock_bh(&im->mca_lock);
785 spin_lock_init(&pmc->mca_lock);
786 pmc->idev = im->idev;
788 pmc->mca_addr = im->mca_addr;
789 pmc->mca_crcount = idev->mc_qrv;
790 pmc->mca_sfmode = im->mca_sfmode;
791 if (pmc->mca_sfmode == MCAST_INCLUDE) {
792 struct ip6_sf_list *psf;
794 pmc->mca_tomb = im->mca_tomb;
795 pmc->mca_sources = im->mca_sources;
796 im->mca_tomb = im->mca_sources = NULL;
797 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
798 psf->sf_crcount = pmc->mca_crcount;
800 spin_unlock_bh(&im->mca_lock);
802 write_lock_bh(&idev->mc_lock);
803 pmc->next = idev->mc_tomb;
805 write_unlock_bh(&idev->mc_lock);
808 static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
810 struct ifmcaddr6 *pmc, *pmc_prev;
811 struct ip6_sf_list *psf, *psf_next;
813 write_lock_bh(&idev->mc_lock);
815 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
816 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
822 pmc_prev->next = pmc->next;
824 idev->mc_tomb = pmc->next;
826 write_unlock_bh(&idev->mc_lock);
828 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
829 psf_next = psf->sf_next;
832 in6_dev_put(pmc->idev);
837 static void mld_clear_delrec(struct inet6_dev *idev)
839 struct ifmcaddr6 *pmc, *nextpmc;
841 write_lock_bh(&idev->mc_lock);
843 idev->mc_tomb = NULL;
844 write_unlock_bh(&idev->mc_lock);
846 for (; pmc; pmc = nextpmc) {
848 ip6_mc_clear_src(pmc);
849 in6_dev_put(pmc->idev);
853 /* clear dead sources, too */
854 read_lock_bh(&idev->lock);
855 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
856 struct ip6_sf_list *psf, *psf_next;
858 spin_lock_bh(&pmc->mca_lock);
860 pmc->mca_tomb = NULL;
861 spin_unlock_bh(&pmc->mca_lock);
862 for (; psf; psf=psf_next) {
863 psf_next = psf->sf_next;
867 read_unlock_bh(&idev->lock);
872 * device multicast group inc (add if not found)
874 int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr)
876 struct ifmcaddr6 *mc;
877 struct inet6_dev *idev;
879 idev = in6_dev_get(dev);
884 write_lock_bh(&idev->lock);
886 write_unlock_bh(&idev->lock);
891 for (mc = idev->mc_list; mc; mc = mc->next) {
892 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
894 write_unlock_bh(&idev->lock);
895 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
903 * not found: create a new one.
906 mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
909 write_unlock_bh(&idev->lock);
914 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
916 ipv6_addr_copy(&mc->mca_addr, addr);
919 /* mca_stamp should be updated upon changes */
920 mc->mca_cstamp = mc->mca_tstamp = jiffies;
921 atomic_set(&mc->mca_refcnt, 2);
922 spin_lock_init(&mc->mca_lock);
924 /* initial mode is (EX, empty) */
925 mc->mca_sfmode = MCAST_EXCLUDE;
926 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
928 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
929 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
930 mc->mca_flags |= MAF_NOREPORT;
932 mc->next = idev->mc_list;
934 write_unlock_bh(&idev->lock);
936 mld_del_delrec(idev, &mc->mca_addr);
937 igmp6_group_added(mc);
943 * device multicast group del
945 int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr)
947 struct ifmcaddr6 *ma, **map;
949 write_lock_bh(&idev->lock);
950 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
951 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
952 if (--ma->mca_users == 0) {
954 write_unlock_bh(&idev->lock);
956 igmp6_group_dropped(ma);
961 write_unlock_bh(&idev->lock);
965 write_unlock_bh(&idev->lock);
970 int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr)
972 struct inet6_dev *idev = in6_dev_get(dev);
978 err = __ipv6_dev_mc_dec(idev, addr);
986 * identify MLD packets for MLD filter exceptions
988 int ipv6_is_mld(struct sk_buff *skb, int nexthdr)
990 struct icmp6hdr *pic;
992 if (nexthdr != IPPROTO_ICMPV6)
995 if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
998 pic = icmp6_hdr(skb);
1000 switch (pic->icmp6_type) {
1001 case ICMPV6_MGM_QUERY:
1002 case ICMPV6_MGM_REPORT:
1003 case ICMPV6_MGM_REDUCTION:
1004 case ICMPV6_MLD2_REPORT:
1013 * check if the interface/address pair is valid
1015 int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
1016 struct in6_addr *src_addr)
1018 struct inet6_dev *idev;
1019 struct ifmcaddr6 *mc;
1022 idev = in6_dev_get(dev);
1024 read_lock_bh(&idev->lock);
1025 for (mc = idev->mc_list; mc; mc=mc->next) {
1026 if (ipv6_addr_equal(&mc->mca_addr, group))
1030 if (src_addr && !ipv6_addr_any(src_addr)) {
1031 struct ip6_sf_list *psf;
1033 spin_lock_bh(&mc->mca_lock);
1034 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
1035 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
1039 rv = psf->sf_count[MCAST_INCLUDE] ||
1040 psf->sf_count[MCAST_EXCLUDE] !=
1041 mc->mca_sfcount[MCAST_EXCLUDE];
1043 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
1044 spin_unlock_bh(&mc->mca_lock);
1046 rv = 1; /* don't filter unspecified source */
1048 read_unlock_bh(&idev->lock);
1054 static void mld_gq_start_timer(struct inet6_dev *idev)
1056 int tv = net_random() % idev->mc_maxdelay;
1058 idev->mc_gq_running = 1;
1059 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1063 static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
1065 int tv = net_random() % delay;
1067 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1072 * IGMP handling (alias multicast ICMPv6 messages)
1075 static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1077 unsigned long delay = resptime;
1079 /* Do not start timer for these addresses */
1080 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1081 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1084 if (del_timer(&ma->mca_timer)) {
1085 atomic_dec(&ma->mca_refcnt);
1086 delay = ma->mca_timer.expires - jiffies;
1089 if (delay >= resptime) {
1091 delay = net_random() % resptime;
1095 ma->mca_timer.expires = jiffies + delay;
1096 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1097 atomic_inc(&ma->mca_refcnt);
1098 ma->mca_flags |= MAF_TIMER_RUNNING;
1101 /* mark EXCLUDE-mode sources */
1102 static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
1103 struct in6_addr *srcs)
1105 struct ip6_sf_list *psf;
1109 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1110 if (scount == nsrcs)
1112 for (i=0; i<nsrcs; i++) {
1113 /* skip inactive filters */
1114 if (pmc->mca_sfcount[MCAST_INCLUDE] ||
1115 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1116 psf->sf_count[MCAST_EXCLUDE])
1118 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1124 pmc->mca_flags &= ~MAF_GSQUERY;
1125 if (scount == nsrcs) /* all sources excluded */
1130 static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1131 struct in6_addr *srcs)
1133 struct ip6_sf_list *psf;
1136 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1137 return mld_xmarksources(pmc, nsrcs, srcs);
1139 /* mark INCLUDE-mode sources */
1142 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1143 if (scount == nsrcs)
1145 for (i=0; i<nsrcs; i++) {
1146 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1154 pmc->mca_flags &= ~MAF_GSQUERY;
1157 pmc->mca_flags |= MAF_GSQUERY;
1161 int igmp6_event_query(struct sk_buff *skb)
1163 struct mld2_query *mlh2 = NULL;
1164 struct ifmcaddr6 *ma;
1165 struct in6_addr *group;
1166 unsigned long max_delay;
1167 struct inet6_dev *idev;
1168 struct icmp6hdr *hdr;
1173 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1176 /* compute payload length excluding extension headers */
1177 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
1178 len -= skb_network_header_len(skb);
1180 /* Drop queries with not link local source */
1181 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
1184 idev = in6_dev_get(skb->dev);
1189 hdr = icmp6_hdr(skb);
1190 group = (struct in6_addr *) (hdr + 1);
1191 group_type = ipv6_addr_type(group);
1193 if (group_type != IPV6_ADDR_ANY &&
1194 !(group_type&IPV6_ADDR_MULTICAST)) {
1201 /* MLDv1 router present */
1203 /* Translate milliseconds to jiffies */
1204 max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000;
1206 switchback = (idev->mc_qrv + 1) * max_delay;
1207 idev->mc_v1_seen = jiffies + switchback;
1209 /* cancel the interface change timer */
1210 idev->mc_ifc_count = 0;
1211 if (del_timer(&idev->mc_ifc_timer))
1212 __in6_dev_put(idev);
1213 /* clear deleted report items */
1214 mld_clear_delrec(idev);
1215 } else if (len >= 28) {
1216 int srcs_offset = sizeof(struct mld2_query) -
1217 sizeof(struct icmp6hdr);
1218 if (!pskb_may_pull(skb, srcs_offset)) {
1222 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1223 max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
1226 idev->mc_maxdelay = max_delay;
1228 idev->mc_qrv = mlh2->qrv;
1229 if (group_type == IPV6_ADDR_ANY) { /* general query */
1232 return -EINVAL; /* no sources allowed */
1234 mld_gq_start_timer(idev);
1238 /* mark sources to include, if group & source-specific */
1239 if (mlh2->nsrcs != 0) {
1240 if (!pskb_may_pull(skb, srcs_offset +
1241 ntohs(mlh2->nsrcs) * sizeof(struct in6_addr))) {
1245 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1253 read_lock_bh(&idev->lock);
1254 if (group_type == IPV6_ADDR_ANY) {
1255 for (ma = idev->mc_list; ma; ma=ma->next) {
1256 spin_lock_bh(&ma->mca_lock);
1257 igmp6_group_queried(ma, max_delay);
1258 spin_unlock_bh(&ma->mca_lock);
1261 for (ma = idev->mc_list; ma; ma=ma->next) {
1262 if (!ipv6_addr_equal(group, &ma->mca_addr))
1264 spin_lock_bh(&ma->mca_lock);
1265 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1266 /* gsquery <- gsquery && mark */
1268 ma->mca_flags &= ~MAF_GSQUERY;
1270 /* gsquery <- mark */
1272 ma->mca_flags |= MAF_GSQUERY;
1274 ma->mca_flags &= ~MAF_GSQUERY;
1276 if (!(ma->mca_flags & MAF_GSQUERY) ||
1277 mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs))
1278 igmp6_group_queried(ma, max_delay);
1279 spin_unlock_bh(&ma->mca_lock);
1283 read_unlock_bh(&idev->lock);
1290 int igmp6_event_report(struct sk_buff *skb)
1292 struct ifmcaddr6 *ma;
1293 struct in6_addr *addrp;
1294 struct inet6_dev *idev;
1295 struct icmp6hdr *hdr;
1298 /* Our own report looped back. Ignore it. */
1299 if (skb->pkt_type == PACKET_LOOPBACK)
1302 /* send our report if the MC router may not have heard this report */
1303 if (skb->pkt_type != PACKET_MULTICAST &&
1304 skb->pkt_type != PACKET_BROADCAST)
1307 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1310 hdr = icmp6_hdr(skb);
1312 /* Drop reports with not link local source */
1313 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
1314 if (addr_type != IPV6_ADDR_ANY &&
1315 !(addr_type&IPV6_ADDR_LINKLOCAL))
1318 addrp = (struct in6_addr *) (hdr + 1);
1320 idev = in6_dev_get(skb->dev);
1325 * Cancel the timer for this group
1328 read_lock_bh(&idev->lock);
1329 for (ma = idev->mc_list; ma; ma=ma->next) {
1330 if (ipv6_addr_equal(&ma->mca_addr, addrp)) {
1331 spin_lock(&ma->mca_lock);
1332 if (del_timer(&ma->mca_timer))
1333 atomic_dec(&ma->mca_refcnt);
1334 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1335 spin_unlock(&ma->mca_lock);
1339 read_unlock_bh(&idev->lock);
1344 static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1345 int gdeleted, int sdeleted)
1348 case MLD2_MODE_IS_INCLUDE:
1349 case MLD2_MODE_IS_EXCLUDE:
1350 if (gdeleted || sdeleted)
1352 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1353 if (pmc->mca_sfmode == MCAST_INCLUDE)
1355 /* don't include if this source is excluded
1358 if (psf->sf_count[MCAST_INCLUDE])
1359 return type == MLD2_MODE_IS_INCLUDE;
1360 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1361 psf->sf_count[MCAST_EXCLUDE];
1364 case MLD2_CHANGE_TO_INCLUDE:
1365 if (gdeleted || sdeleted)
1367 return psf->sf_count[MCAST_INCLUDE] != 0;
1368 case MLD2_CHANGE_TO_EXCLUDE:
1369 if (gdeleted || sdeleted)
1371 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1372 psf->sf_count[MCAST_INCLUDE])
1374 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1375 psf->sf_count[MCAST_EXCLUDE];
1376 case MLD2_ALLOW_NEW_SOURCES:
1377 if (gdeleted || !psf->sf_crcount)
1379 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1380 case MLD2_BLOCK_OLD_SOURCES:
1381 if (pmc->mca_sfmode == MCAST_INCLUDE)
1382 return gdeleted || (psf->sf_crcount && sdeleted);
1383 return psf->sf_crcount && !gdeleted && !sdeleted;
1389 mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1391 struct ip6_sf_list *psf;
1394 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1395 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1402 static struct sk_buff *mld_newpack(struct net_device *dev, int size)
1404 struct net *net = dev_net(dev);
1405 struct sock *sk = net->ipv6.igmp_sk;
1406 struct sk_buff *skb;
1407 struct mld2_report *pmr;
1408 struct in6_addr addr_buf;
1410 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1411 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1414 /* we assume size > sizeof(ra) here */
1415 skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err);
1420 skb_reserve(skb, LL_RESERVED_SPACE(dev));
1422 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1423 /* <draft-ietf-magma-mld-source-05.txt>:
1424 * use unspecified address as the source address
1425 * when a valid link-local address is not available.
1427 memset(&addr_buf, 0, sizeof(addr_buf));
1430 ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0);
1432 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1434 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
1435 skb_put(skb, sizeof(*pmr));
1436 pmr = (struct mld2_report *)skb_transport_header(skb);
1437 pmr->type = ICMPV6_MLD2_REPORT;
1445 static void mld_sendpack(struct sk_buff *skb)
1447 struct ipv6hdr *pip6 = ipv6_hdr(skb);
1448 struct mld2_report *pmr =
1449 (struct mld2_report *)skb_transport_header(skb);
1450 int payload_len, mldlen;
1451 struct inet6_dev *idev = in6_dev_get(skb->dev);
1452 struct net *net = dev_net(skb->dev);
1456 IP6_INC_STATS(idev, IPSTATS_MIB_OUTREQUESTS);
1457 payload_len = (skb->tail - skb->network_header) - sizeof(*pip6);
1458 mldlen = skb->tail - skb->transport_header;
1459 pip6->payload_len = htons(payload_len);
1461 pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1462 IPPROTO_ICMPV6, csum_partial(skb_transport_header(skb),
1465 skb->dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
1472 icmpv6_flow_init(net->ipv6.igmp_sk, &fl, ICMPV6_MLD2_REPORT,
1473 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1476 err = xfrm_lookup(&skb->dst, &fl, NULL, 0);
1480 err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1484 ICMP6MSGOUT_INC_STATS_BH(idev, ICMPV6_MLD2_REPORT);
1485 ICMP6_INC_STATS_BH(idev, ICMP6_MIB_OUTMSGS);
1486 IP6_INC_STATS_BH(idev, IPSTATS_MIB_OUTMCASTPKTS);
1488 IP6_INC_STATS_BH(idev, IPSTATS_MIB_OUTDISCARDS);
1490 if (likely(idev != NULL))
1499 static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1501 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
1504 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1505 int type, struct mld2_grec **ppgr)
1507 struct net_device *dev = pmc->idev->dev;
1508 struct mld2_report *pmr;
1509 struct mld2_grec *pgr;
1512 skb = mld_newpack(dev, dev->mtu);
1515 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1516 pgr->grec_type = type;
1517 pgr->grec_auxwords = 0;
1518 pgr->grec_nsrcs = 0;
1519 pgr->grec_mca = pmc->mca_addr; /* structure copy */
1520 pmr = (struct mld2_report *)skb_transport_header(skb);
1521 pmr->ngrec = htons(ntohs(pmr->ngrec)+1);
1526 #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1527 skb_tailroom(skb)) : 0)
1529 static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1530 int type, int gdeleted, int sdeleted)
1532 struct net_device *dev = pmc->idev->dev;
1533 struct mld2_report *pmr;
1534 struct mld2_grec *pgr = NULL;
1535 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
1536 int scount, stotal, first, isquery, truncate;
1538 if (pmc->mca_flags & MAF_NOREPORT)
1541 isquery = type == MLD2_MODE_IS_INCLUDE ||
1542 type == MLD2_MODE_IS_EXCLUDE;
1543 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1544 type == MLD2_CHANGE_TO_EXCLUDE;
1546 stotal = scount = 0;
1548 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1553 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
1555 /* EX and TO_EX get a fresh packet, if needed */
1557 if (pmr && pmr->ngrec &&
1558 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1561 skb = mld_newpack(dev, dev->mtu);
1566 for (psf=*psf_list; psf; psf=psf_next) {
1567 struct in6_addr *psrc;
1569 psf_next = psf->sf_next;
1571 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1576 /* clear marks on query responses */
1580 if (AVAILABLE(skb) < sizeof(*psrc) +
1581 first*sizeof(struct mld2_grec)) {
1582 if (truncate && !first)
1583 break; /* truncate these */
1585 pgr->grec_nsrcs = htons(scount);
1588 skb = mld_newpack(dev, dev->mtu);
1593 skb = add_grhead(skb, pmc, type, &pgr);
1598 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1599 *psrc = psf->sf_addr;
1601 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1602 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1604 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1606 psf_prev->sf_next = psf->sf_next;
1608 *psf_list = psf->sf_next;
1618 if (type == MLD2_ALLOW_NEW_SOURCES ||
1619 type == MLD2_BLOCK_OLD_SOURCES)
1621 if (pmc->mca_crcount || isquery) {
1622 /* make sure we have room for group header */
1623 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1625 skb = NULL; /* add_grhead will get a new one */
1627 skb = add_grhead(skb, pmc, type, &pgr);
1631 pgr->grec_nsrcs = htons(scount);
1634 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1638 static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1640 struct sk_buff *skb = NULL;
1644 read_lock_bh(&idev->lock);
1645 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1646 if (pmc->mca_flags & MAF_NOREPORT)
1648 spin_lock_bh(&pmc->mca_lock);
1649 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1650 type = MLD2_MODE_IS_EXCLUDE;
1652 type = MLD2_MODE_IS_INCLUDE;
1653 skb = add_grec(skb, pmc, type, 0, 0);
1654 spin_unlock_bh(&pmc->mca_lock);
1656 read_unlock_bh(&idev->lock);
1658 spin_lock_bh(&pmc->mca_lock);
1659 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1660 type = MLD2_MODE_IS_EXCLUDE;
1662 type = MLD2_MODE_IS_INCLUDE;
1663 skb = add_grec(skb, pmc, type, 0, 0);
1664 spin_unlock_bh(&pmc->mca_lock);
1671 * remove zero-count source records from a source filter list
1673 static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1675 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1678 for (psf=*ppsf; psf; psf = psf_next) {
1679 psf_next = psf->sf_next;
1680 if (psf->sf_crcount == 0) {
1682 psf_prev->sf_next = psf->sf_next;
1684 *ppsf = psf->sf_next;
1691 static void mld_send_cr(struct inet6_dev *idev)
1693 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1694 struct sk_buff *skb = NULL;
1697 read_lock_bh(&idev->lock);
1698 write_lock_bh(&idev->mc_lock);
1702 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1703 pmc_next = pmc->next;
1704 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1705 type = MLD2_BLOCK_OLD_SOURCES;
1706 dtype = MLD2_BLOCK_OLD_SOURCES;
1707 skb = add_grec(skb, pmc, type, 1, 0);
1708 skb = add_grec(skb, pmc, dtype, 1, 1);
1710 if (pmc->mca_crcount) {
1711 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1712 type = MLD2_CHANGE_TO_INCLUDE;
1713 skb = add_grec(skb, pmc, type, 1, 0);
1716 if (pmc->mca_crcount == 0) {
1717 mld_clear_zeros(&pmc->mca_tomb);
1718 mld_clear_zeros(&pmc->mca_sources);
1721 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1722 !pmc->mca_sources) {
1724 pmc_prev->next = pmc_next;
1726 idev->mc_tomb = pmc_next;
1727 in6_dev_put(pmc->idev);
1732 write_unlock_bh(&idev->mc_lock);
1735 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1736 spin_lock_bh(&pmc->mca_lock);
1737 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1738 type = MLD2_BLOCK_OLD_SOURCES;
1739 dtype = MLD2_ALLOW_NEW_SOURCES;
1741 type = MLD2_ALLOW_NEW_SOURCES;
1742 dtype = MLD2_BLOCK_OLD_SOURCES;
1744 skb = add_grec(skb, pmc, type, 0, 0);
1745 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1747 /* filter mode changes */
1748 if (pmc->mca_crcount) {
1749 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1750 type = MLD2_CHANGE_TO_EXCLUDE;
1752 type = MLD2_CHANGE_TO_INCLUDE;
1753 skb = add_grec(skb, pmc, type, 0, 0);
1756 spin_unlock_bh(&pmc->mca_lock);
1758 read_unlock_bh(&idev->lock);
1761 (void) mld_sendpack(skb);
1764 static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1766 struct net *net = dev_net(dev);
1767 struct sock *sk = net->ipv6.igmp_sk;
1768 struct inet6_dev *idev;
1769 struct sk_buff *skb;
1770 struct icmp6hdr *hdr;
1771 struct in6_addr *snd_addr;
1772 struct in6_addr *addrp;
1773 struct in6_addr addr_buf;
1774 struct in6_addr all_routers;
1775 int err, len, payload_len, full_len;
1776 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1777 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1782 IP6_INC_STATS(__in6_dev_get(dev),
1783 IPSTATS_MIB_OUTREQUESTS);
1786 if (type == ICMPV6_MGM_REDUCTION) {
1787 snd_addr = &all_routers;
1788 ipv6_addr_all_routers(&all_routers);
1791 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1792 payload_len = len + sizeof(ra);
1793 full_len = sizeof(struct ipv6hdr) + payload_len;
1795 skb = sock_alloc_send_skb(sk, LL_RESERVED_SPACE(dev) + full_len, 1, &err);
1799 IP6_INC_STATS(__in6_dev_get(dev),
1800 IPSTATS_MIB_OUTDISCARDS);
1805 skb_reserve(skb, LL_RESERVED_SPACE(dev));
1807 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1808 /* <draft-ietf-magma-mld-source-05.txt>:
1809 * use unspecified address as the source address
1810 * when a valid link-local address is not available.
1812 memset(&addr_buf, 0, sizeof(addr_buf));
1815 ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len);
1817 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1819 hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr));
1820 memset(hdr, 0, sizeof(struct icmp6hdr));
1821 hdr->icmp6_type = type;
1823 addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
1824 ipv6_addr_copy(addrp, addr);
1826 hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len,
1828 csum_partial((__u8 *) hdr, len, 0));
1830 idev = in6_dev_get(skb->dev);
1832 skb->dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
1838 icmpv6_flow_init(sk, &fl, type,
1839 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1842 err = xfrm_lookup(&skb->dst, &fl, NULL, 0);
1846 err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1850 ICMP6MSGOUT_INC_STATS(idev, type);
1851 ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS);
1852 IP6_INC_STATS(idev, IPSTATS_MIB_OUTMCASTPKTS);
1854 IP6_INC_STATS(idev, IPSTATS_MIB_OUTDISCARDS);
1856 if (likely(idev != NULL))
1865 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
1866 struct in6_addr *psfsrc)
1868 struct ip6_sf_list *psf, *psf_prev;
1872 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1873 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1877 if (!psf || psf->sf_count[sfmode] == 0) {
1878 /* source filter not found, or count wrong => bug */
1881 psf->sf_count[sfmode]--;
1882 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1883 struct inet6_dev *idev = pmc->idev;
1885 /* no more filters for this source */
1887 psf_prev->sf_next = psf->sf_next;
1889 pmc->mca_sources = psf->sf_next;
1890 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1891 !MLD_V1_SEEN(idev)) {
1892 psf->sf_crcount = idev->mc_qrv;
1893 psf->sf_next = pmc->mca_tomb;
1894 pmc->mca_tomb = psf;
1902 static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
1903 int sfmode, int sfcount, struct in6_addr *psfsrc,
1906 struct ifmcaddr6 *pmc;
1912 read_lock_bh(&idev->lock);
1913 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1914 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1918 /* MCA not found?? bug */
1919 read_unlock_bh(&idev->lock);
1922 spin_lock_bh(&pmc->mca_lock);
1925 if (!pmc->mca_sfcount[sfmode]) {
1926 spin_unlock_bh(&pmc->mca_lock);
1927 read_unlock_bh(&idev->lock);
1930 pmc->mca_sfcount[sfmode]--;
1933 for (i=0; i<sfcount; i++) {
1934 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1936 changerec |= rv > 0;
1940 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1941 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1942 pmc->mca_sfcount[MCAST_INCLUDE]) {
1943 struct ip6_sf_list *psf;
1945 /* filter mode change */
1946 pmc->mca_sfmode = MCAST_INCLUDE;
1947 pmc->mca_crcount = idev->mc_qrv;
1948 idev->mc_ifc_count = pmc->mca_crcount;
1949 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1950 psf->sf_crcount = 0;
1951 mld_ifc_event(pmc->idev);
1952 } else if (sf_setstate(pmc) || changerec)
1953 mld_ifc_event(pmc->idev);
1954 spin_unlock_bh(&pmc->mca_lock);
1955 read_unlock_bh(&idev->lock);
1960 * Add multicast single-source filter to the interface list
1962 static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
1963 struct in6_addr *psfsrc, int delta)
1965 struct ip6_sf_list *psf, *psf_prev;
1968 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1969 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1974 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
1978 psf->sf_addr = *psfsrc;
1980 psf_prev->sf_next = psf;
1982 pmc->mca_sources = psf;
1984 psf->sf_count[sfmode]++;
1988 static void sf_markstate(struct ifmcaddr6 *pmc)
1990 struct ip6_sf_list *psf;
1991 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1993 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1994 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1995 psf->sf_oldin = mca_xcount ==
1996 psf->sf_count[MCAST_EXCLUDE] &&
1997 !psf->sf_count[MCAST_INCLUDE];
1999 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
2002 static int sf_setstate(struct ifmcaddr6 *pmc)
2004 struct ip6_sf_list *psf, *dpsf;
2005 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
2006 int qrv = pmc->idev->mc_qrv;
2010 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
2011 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
2012 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
2013 !psf->sf_count[MCAST_INCLUDE];
2015 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
2017 if (!psf->sf_oldin) {
2018 struct ip6_sf_list *prev = NULL;
2020 for (dpsf=pmc->mca_tomb; dpsf;
2021 dpsf=dpsf->sf_next) {
2022 if (ipv6_addr_equal(&dpsf->sf_addr,
2029 prev->sf_next = dpsf->sf_next;
2031 pmc->mca_tomb = dpsf->sf_next;
2034 psf->sf_crcount = qrv;
2037 } else if (psf->sf_oldin) {
2038 psf->sf_crcount = 0;
2040 * add or update "delete" records if an active filter
2043 for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
2044 if (ipv6_addr_equal(&dpsf->sf_addr,
2048 dpsf = (struct ip6_sf_list *)
2049 kmalloc(sizeof(*dpsf), GFP_ATOMIC);
2053 /* pmc->mca_lock held by callers */
2054 dpsf->sf_next = pmc->mca_tomb;
2055 pmc->mca_tomb = dpsf;
2057 dpsf->sf_crcount = qrv;
2065 * Add multicast source filter list to the interface list
2067 static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
2068 int sfmode, int sfcount, struct in6_addr *psfsrc,
2071 struct ifmcaddr6 *pmc;
2077 read_lock_bh(&idev->lock);
2078 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2079 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2083 /* MCA not found?? bug */
2084 read_unlock_bh(&idev->lock);
2087 spin_lock_bh(&pmc->mca_lock);
2090 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2092 pmc->mca_sfcount[sfmode]++;
2094 for (i=0; i<sfcount; i++) {
2095 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
2103 pmc->mca_sfcount[sfmode]--;
2105 (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
2106 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
2107 struct inet6_dev *idev = pmc->idev;
2108 struct ip6_sf_list *psf;
2110 /* filter mode change */
2111 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2112 pmc->mca_sfmode = MCAST_EXCLUDE;
2113 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2114 pmc->mca_sfmode = MCAST_INCLUDE;
2115 /* else no filters; keep old mode for reports */
2117 pmc->mca_crcount = idev->mc_qrv;
2118 idev->mc_ifc_count = pmc->mca_crcount;
2119 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2120 psf->sf_crcount = 0;
2121 mld_ifc_event(idev);
2122 } else if (sf_setstate(pmc))
2123 mld_ifc_event(idev);
2124 spin_unlock_bh(&pmc->mca_lock);
2125 read_unlock_bh(&idev->lock);
2129 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2131 struct ip6_sf_list *psf, *nextpsf;
2133 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
2134 nextpsf = psf->sf_next;
2137 pmc->mca_tomb = NULL;
2138 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
2139 nextpsf = psf->sf_next;
2142 pmc->mca_sources = NULL;
2143 pmc->mca_sfmode = MCAST_EXCLUDE;
2144 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
2145 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2149 static void igmp6_join_group(struct ifmcaddr6 *ma)
2151 unsigned long delay;
2153 if (ma->mca_flags & MAF_NOREPORT)
2156 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2158 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
2160 spin_lock_bh(&ma->mca_lock);
2161 if (del_timer(&ma->mca_timer)) {
2162 atomic_dec(&ma->mca_refcnt);
2163 delay = ma->mca_timer.expires - jiffies;
2166 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2167 atomic_inc(&ma->mca_refcnt);
2168 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2169 spin_unlock_bh(&ma->mca_lock);
2172 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2173 struct inet6_dev *idev)
2177 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2178 * so no other readers or writers of iml or its sflist
2181 /* any-source empty exclude case */
2182 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2184 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2185 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2186 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2191 static void igmp6_leave_group(struct ifmcaddr6 *ma)
2193 if (MLD_V1_SEEN(ma->idev)) {
2194 if (ma->mca_flags & MAF_LAST_REPORTER)
2195 igmp6_send(&ma->mca_addr, ma->idev->dev,
2196 ICMPV6_MGM_REDUCTION);
2198 mld_add_delrec(ma->idev, ma);
2199 mld_ifc_event(ma->idev);
2203 static void mld_gq_timer_expire(unsigned long data)
2205 struct inet6_dev *idev = (struct inet6_dev *)data;
2207 idev->mc_gq_running = 0;
2208 mld_send_report(idev, NULL);
2209 __in6_dev_put(idev);
2212 static void mld_ifc_timer_expire(unsigned long data)
2214 struct inet6_dev *idev = (struct inet6_dev *)data;
2217 if (idev->mc_ifc_count) {
2218 idev->mc_ifc_count--;
2219 if (idev->mc_ifc_count)
2220 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2222 __in6_dev_put(idev);
2225 static void mld_ifc_event(struct inet6_dev *idev)
2227 if (MLD_V1_SEEN(idev))
2229 idev->mc_ifc_count = idev->mc_qrv;
2230 mld_ifc_start_timer(idev, 1);
2234 static void igmp6_timer_handler(unsigned long data)
2236 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2238 if (MLD_V1_SEEN(ma->idev))
2239 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2241 mld_send_report(ma->idev, ma);
2243 spin_lock(&ma->mca_lock);
2244 ma->mca_flags |= MAF_LAST_REPORTER;
2245 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2246 spin_unlock(&ma->mca_lock);
2250 /* Device going down */
2252 void ipv6_mc_down(struct inet6_dev *idev)
2254 struct ifmcaddr6 *i;
2256 /* Withdraw multicast list */
2258 read_lock_bh(&idev->lock);
2259 idev->mc_ifc_count = 0;
2260 if (del_timer(&idev->mc_ifc_timer))
2261 __in6_dev_put(idev);
2262 idev->mc_gq_running = 0;
2263 if (del_timer(&idev->mc_gq_timer))
2264 __in6_dev_put(idev);
2266 for (i = idev->mc_list; i; i=i->next)
2267 igmp6_group_dropped(i);
2268 read_unlock_bh(&idev->lock);
2270 mld_clear_delrec(idev);
2274 /* Device going up */
2276 void ipv6_mc_up(struct inet6_dev *idev)
2278 struct ifmcaddr6 *i;
2280 /* Install multicast list, except for all-nodes (already installed) */
2282 read_lock_bh(&idev->lock);
2283 for (i = idev->mc_list; i; i=i->next)
2284 igmp6_group_added(i);
2285 read_unlock_bh(&idev->lock);
2288 /* IPv6 device initialization. */
2290 void ipv6_mc_init_dev(struct inet6_dev *idev)
2292 write_lock_bh(&idev->lock);
2293 rwlock_init(&idev->mc_lock);
2294 idev->mc_gq_running = 0;
2295 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2296 (unsigned long)idev);
2297 idev->mc_tomb = NULL;
2298 idev->mc_ifc_count = 0;
2299 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2300 (unsigned long)idev);
2301 idev->mc_qrv = MLD_QRV_DEFAULT;
2302 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2303 idev->mc_v1_seen = 0;
2304 write_unlock_bh(&idev->lock);
2308 * Device is about to be destroyed: clean up.
2311 void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2313 struct ifmcaddr6 *i;
2314 struct in6_addr maddr;
2316 /* Deactivate timers */
2319 /* Delete all-nodes address. */
2320 ipv6_addr_all_nodes(&maddr);
2322 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2323 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2326 __ipv6_dev_mc_dec(idev, &maddr);
2328 if (idev->cnf.forwarding) {
2329 ipv6_addr_all_routers(&maddr);
2330 __ipv6_dev_mc_dec(idev, &maddr);
2333 write_lock_bh(&idev->lock);
2334 while ((i = idev->mc_list) != NULL) {
2335 idev->mc_list = i->next;
2336 write_unlock_bh(&idev->lock);
2338 igmp6_group_dropped(i);
2341 write_lock_bh(&idev->lock);
2343 write_unlock_bh(&idev->lock);
2346 #ifdef CONFIG_PROC_FS
2347 struct igmp6_mc_iter_state {
2348 struct seq_net_private p;
2349 struct net_device *dev;
2350 struct inet6_dev *idev;
2353 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2355 static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2357 struct ifmcaddr6 *im = NULL;
2358 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2359 struct net *net = seq_file_net(seq);
2362 for_each_netdev(net, state->dev) {
2363 struct inet6_dev *idev;
2364 idev = in6_dev_get(state->dev);
2367 read_lock_bh(&idev->lock);
2373 read_unlock_bh(&idev->lock);
2379 static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2381 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2385 if (likely(state->idev != NULL)) {
2386 read_unlock_bh(&state->idev->lock);
2387 in6_dev_put(state->idev);
2389 state->dev = next_net_device(state->dev);
2394 state->idev = in6_dev_get(state->dev);
2397 read_lock_bh(&state->idev->lock);
2398 im = state->idev->mc_list;
2403 static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2405 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2407 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2409 return pos ? NULL : im;
2412 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
2413 __acquires(dev_base_lock)
2415 read_lock(&dev_base_lock);
2416 return igmp6_mc_get_idx(seq, *pos);
2419 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2421 struct ifmcaddr6 *im;
2422 im = igmp6_mc_get_next(seq, v);
2427 static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
2428 __releases(dev_base_lock)
2430 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2431 if (likely(state->idev != NULL)) {
2432 read_unlock_bh(&state->idev->lock);
2433 in6_dev_put(state->idev);
2437 read_unlock(&dev_base_lock);
2440 static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2442 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2443 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2446 "%-4d %-15s " NIP6_SEQFMT " %5d %08X %ld\n",
2447 state->dev->ifindex, state->dev->name,
2449 im->mca_users, im->mca_flags,
2450 (im->mca_flags&MAF_TIMER_RUNNING) ?
2451 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2455 static const struct seq_operations igmp6_mc_seq_ops = {
2456 .start = igmp6_mc_seq_start,
2457 .next = igmp6_mc_seq_next,
2458 .stop = igmp6_mc_seq_stop,
2459 .show = igmp6_mc_seq_show,
2462 static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2464 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2465 sizeof(struct igmp6_mc_iter_state));
2468 static const struct file_operations igmp6_mc_seq_fops = {
2469 .owner = THIS_MODULE,
2470 .open = igmp6_mc_seq_open,
2472 .llseek = seq_lseek,
2473 .release = seq_release_net,
2476 struct igmp6_mcf_iter_state {
2477 struct seq_net_private p;
2478 struct net_device *dev;
2479 struct inet6_dev *idev;
2480 struct ifmcaddr6 *im;
2483 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2485 static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2487 struct ip6_sf_list *psf = NULL;
2488 struct ifmcaddr6 *im = NULL;
2489 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2490 struct net *net = seq_file_net(seq);
2494 for_each_netdev(net, state->dev) {
2495 struct inet6_dev *idev;
2496 idev = in6_dev_get(state->dev);
2497 if (unlikely(idev == NULL))
2499 read_lock_bh(&idev->lock);
2501 if (likely(im != NULL)) {
2502 spin_lock_bh(&im->mca_lock);
2503 psf = im->mca_sources;
2504 if (likely(psf != NULL)) {
2509 spin_unlock_bh(&im->mca_lock);
2511 read_unlock_bh(&idev->lock);
2517 static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2519 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2523 spin_unlock_bh(&state->im->mca_lock);
2524 state->im = state->im->next;
2525 while (!state->im) {
2526 if (likely(state->idev != NULL)) {
2527 read_unlock_bh(&state->idev->lock);
2528 in6_dev_put(state->idev);
2530 state->dev = next_net_device(state->dev);
2535 state->idev = in6_dev_get(state->dev);
2538 read_lock_bh(&state->idev->lock);
2539 state->im = state->idev->mc_list;
2543 spin_lock_bh(&state->im->mca_lock);
2544 psf = state->im->mca_sources;
2550 static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2552 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2554 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2556 return pos ? NULL : psf;
2559 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
2560 __acquires(dev_base_lock)
2562 read_lock(&dev_base_lock);
2563 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2566 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2568 struct ip6_sf_list *psf;
2569 if (v == SEQ_START_TOKEN)
2570 psf = igmp6_mcf_get_first(seq);
2572 psf = igmp6_mcf_get_next(seq, v);
2577 static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
2578 __releases(dev_base_lock)
2580 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2581 if (likely(state->im != NULL)) {
2582 spin_unlock_bh(&state->im->mca_lock);
2585 if (likely(state->idev != NULL)) {
2586 read_unlock_bh(&state->idev->lock);
2587 in6_dev_put(state->idev);
2591 read_unlock(&dev_base_lock);
2594 static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2596 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2597 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2599 if (v == SEQ_START_TOKEN) {
2602 "%32s %32s %6s %6s\n", "Idx",
2603 "Device", "Multicast Address",
2604 "Source Address", "INC", "EXC");
2607 "%3d %6.6s " NIP6_SEQFMT " " NIP6_SEQFMT " %6lu %6lu\n",
2608 state->dev->ifindex, state->dev->name,
2609 NIP6(state->im->mca_addr),
2611 psf->sf_count[MCAST_INCLUDE],
2612 psf->sf_count[MCAST_EXCLUDE]);
2617 static const struct seq_operations igmp6_mcf_seq_ops = {
2618 .start = igmp6_mcf_seq_start,
2619 .next = igmp6_mcf_seq_next,
2620 .stop = igmp6_mcf_seq_stop,
2621 .show = igmp6_mcf_seq_show,
2624 static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2626 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2627 sizeof(struct igmp6_mcf_iter_state));
2630 static const struct file_operations igmp6_mcf_seq_fops = {
2631 .owner = THIS_MODULE,
2632 .open = igmp6_mcf_seq_open,
2634 .llseek = seq_lseek,
2635 .release = seq_release_net,
2638 static int igmp6_proc_init(struct net *net)
2643 if (!proc_net_fops_create(net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops))
2645 if (!proc_net_fops_create(net, "mcfilter6", S_IRUGO,
2646 &igmp6_mcf_seq_fops))
2647 goto out_proc_net_igmp6;
2654 proc_net_remove(net, "igmp6");
2658 static void igmp6_proc_exit(struct net *net)
2660 proc_net_remove(net, "mcfilter6");
2661 proc_net_remove(net, "igmp6");
2664 static int igmp6_proc_init(struct net *net)
2668 static void igmp6_proc_exit(struct net *net)
2674 static int igmp6_net_init(struct net *net)
2678 err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
2679 SOCK_RAW, IPPROTO_ICMPV6, net);
2682 "Failed to initialize the IGMP6 control socket (err %d).\n",
2687 inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
2689 err = igmp6_proc_init(net);
2691 goto out_sock_create;
2696 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2700 static void igmp6_net_exit(struct net *net)
2702 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2703 igmp6_proc_exit(net);
2706 static struct pernet_operations igmp6_net_ops = {
2707 .init = igmp6_net_init,
2708 .exit = igmp6_net_exit,
2711 int __init igmp6_init(void)
2713 return register_pernet_subsys(&igmp6_net_ops);
2716 void igmp6_cleanup(void)
2718 unregister_pernet_subsys(&igmp6_net_ops);