156 static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im,
158 static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im);
167 static void ip_ma_put(struct ip_mc_list *im)  in ip_ma_put()  argument
169 	if (refcount_dec_and_test(&im->refcnt)) {  in ip_ma_put()
170 		in_dev_put(im->interface);  in ip_ma_put()
171 		kfree_rcu(im, rcu);  in ip_ma_put()
202 static void igmp_stop_timer(struct ip_mc_list *im)  in igmp_stop_timer()  argument
204 	spin_lock_bh(&im->lock);  in igmp_stop_timer()
205 	if (del_timer(&im->timer))  in igmp_stop_timer()
206 		refcount_dec(&im->refcnt);  in igmp_stop_timer()
207 	im->tm_running = 0;  in igmp_stop_timer()
208 	im->reporter = 0;  in igmp_stop_timer()
209 	im->unsolicit_count = 0;  in igmp_stop_timer()
210 	spin_unlock_bh(&im->lock);  in igmp_stop_timer()
214 static void igmp_start_timer(struct ip_mc_list *im, int max_delay)  in igmp_start_timer()  argument
218 	im->tm_running = 1;  in igmp_start_timer()
219 	if (!mod_timer(&im->timer, jiffies+tv+2))  in igmp_start_timer()
220 		refcount_inc(&im->refcnt);  in igmp_start_timer()
245 static void igmp_mod_timer(struct ip_mc_list *im, int max_delay)  in igmp_mod_timer()  argument
247 	spin_lock_bh(&im->lock);  in igmp_mod_timer()
248 	im->unsolicit_count = 0;  in igmp_mod_timer()
249 	if (del_timer(&im->timer)) {  in igmp_mod_timer()
250 		if ((long)(im->timer.expires-jiffies) < max_delay) {  in igmp_mod_timer()
251 			add_timer(&im->timer);  in igmp_mod_timer()
252 			im->tm_running = 1;  in igmp_mod_timer()
253 			spin_unlock_bh(&im->lock);  in igmp_mod_timer()
256 		refcount_dec(&im->refcnt);  in igmp_mod_timer()
258 	igmp_start_timer(im, max_delay);  in igmp_mod_timer()
259 	spin_unlock_bh(&im->lock);  in igmp_mod_timer()
837 	struct ip_mc_list *im = from_timer(im, t, timer);  in igmp_timer_expire()  local
838 	struct in_device *in_dev = im->interface;  in igmp_timer_expire()
840 	spin_lock(&im->lock);  in igmp_timer_expire()
841 	im->tm_running = 0;  in igmp_timer_expire()
843 	if (im->unsolicit_count && --im->unsolicit_count)  in igmp_timer_expire()
844 		igmp_start_timer(im, unsolicited_report_interval(in_dev));  in igmp_timer_expire()
846 	im->reporter = 1;  in igmp_timer_expire()
847 	spin_unlock(&im->lock);  in igmp_timer_expire()
850 		igmp_send_report(in_dev, im, IGMP_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
852 		igmp_send_report(in_dev, im, IGMPV2_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
854 		igmp_send_report(in_dev, im, IGMPV3_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
856 	ip_ma_put(im);  in igmp_timer_expire()
918 	struct ip_mc_list *im;  in igmp_heard_report()  local
930 	for_each_pmc_rcu(in_dev, im) {  in igmp_heard_report()
931 		if (im->multiaddr == group) {  in igmp_heard_report()
932 			igmp_stop_timer(im);  in igmp_heard_report()
946 	struct ip_mc_list	*im;  in igmp_heard_query()  local
1043 	for_each_pmc_rcu(in_dev, im) {  in igmp_heard_query()
1046 		if (group && group != im->multiaddr)  in igmp_heard_query()
1048 		if (im->multiaddr == IGMP_ALL_HOSTS)  in igmp_heard_query()
1050 		if (ipv4_is_local_multicast(im->multiaddr) &&  in igmp_heard_query()
1053 		spin_lock_bh(&im->lock);  in igmp_heard_query()
1054 		if (im->tm_running)  in igmp_heard_query()
1055 			im->gsquery = im->gsquery && mark;  in igmp_heard_query()
1057 			im->gsquery = mark;  in igmp_heard_query()
1058 		changed = !im->gsquery ||  in igmp_heard_query()
1059 			igmp_marksources(im, ntohs(ih3->nsrcs), ih3->srcs);  in igmp_heard_query()
1060 		spin_unlock_bh(&im->lock);  in igmp_heard_query()
1062 			igmp_mod_timer(im, max_delay);  in igmp_heard_query()
1172 static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im,  in igmpv3_add_delrec()  argument
1188 	spin_lock_bh(&im->lock);  in igmpv3_add_delrec()
1189 	pmc->interface = im->interface;  in igmpv3_add_delrec()
1191 	pmc->multiaddr = im->multiaddr;  in igmpv3_add_delrec()
1193 	pmc->sfmode = im->sfmode;  in igmpv3_add_delrec()
1197 		pmc->tomb = im->tomb;  in igmpv3_add_delrec()
1198 		pmc->sources = im->sources;  in igmpv3_add_delrec()
1199 		im->tomb = im->sources = NULL;  in igmpv3_add_delrec()
1203 	spin_unlock_bh(&im->lock);  in igmpv3_add_delrec()
1214 static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im)  in igmpv3_del_delrec()  argument
1219 	__be32 multiaddr = im->multiaddr;  in igmpv3_del_delrec()
1236 	spin_lock_bh(&im->lock);  in igmpv3_del_delrec()
1238 		im->interface = pmc->interface;  in igmpv3_del_delrec()
1239 		if (im->sfmode == MCAST_INCLUDE) {  in igmpv3_del_delrec()
1240 			swap(im->tomb, pmc->tomb);  in igmpv3_del_delrec()
1241 			swap(im->sources, pmc->sources);  in igmpv3_del_delrec()
1242 			for (psf = im->sources; psf; psf = psf->sf_next)  in igmpv3_del_delrec()
1246 			im->crcount = in_dev->mr_qrv ?:  in igmpv3_del_delrec()
1252 	spin_unlock_bh(&im->lock);  in igmpv3_del_delrec()
1288 static void __igmp_group_dropped(struct ip_mc_list *im, gfp_t gfp)  in __igmp_group_dropped()  argument
1290 	struct in_device *in_dev = im->interface;  in __igmp_group_dropped()
1296 	if (im->loaded) {  in __igmp_group_dropped()
1297 		im->loaded = 0;  in __igmp_group_dropped()
1298 		ip_mc_filter_del(in_dev, im->multiaddr);  in __igmp_group_dropped()
1302 	if (im->multiaddr == IGMP_ALL_HOSTS)  in __igmp_group_dropped()
1304 	if (ipv4_is_local_multicast(im->multiaddr) &&  in __igmp_group_dropped()
1308 	reporter = im->reporter;  in __igmp_group_dropped()
1309 	igmp_stop_timer(im);  in __igmp_group_dropped()
1316 				igmp_send_report(in_dev, im, IGMP_HOST_LEAVE_MESSAGE);  in __igmp_group_dropped()
1320 		igmpv3_add_delrec(in_dev, im, gfp);  in __igmp_group_dropped()
1327 static void igmp_group_dropped(struct ip_mc_list *im)  in igmp_group_dropped()  argument
1329 	__igmp_group_dropped(im, GFP_KERNEL);  in igmp_group_dropped()
1332 static void igmp_group_added(struct ip_mc_list *im)  in igmp_group_added()  argument
1334 	struct in_device *in_dev = im->interface;  in igmp_group_added()
1339 	if (im->loaded == 0) {  in igmp_group_added()
1340 		im->loaded = 1;  in igmp_group_added()
1341 		ip_mc_filter_add(in_dev, im->multiaddr);  in igmp_group_added()
1345 	if (im->multiaddr == IGMP_ALL_HOSTS)  in igmp_group_added()
1347 	if (ipv4_is_local_multicast(im->multiaddr) &&  in igmp_group_added()
1354 	im->unsolicit_count = READ_ONCE(net->ipv4.sysctl_igmp_qrv);  in igmp_group_added()
1356 		spin_lock_bh(&im->lock);  in igmp_group_added()
1357 		igmp_start_timer(im, IGMP_INITIAL_REPORT_DELAY);  in igmp_group_added()
1358 		spin_unlock_bh(&im->lock);  in igmp_group_added()
1367 	if (im->sfmode == MCAST_EXCLUDE)  in igmp_group_added()
1368 		im->crcount = in_dev->mr_qrv ?: READ_ONCE(net->ipv4.sysctl_igmp_qrv);  in igmp_group_added()
1379 static u32 ip_mc_hash(const struct ip_mc_list *im)  in ip_mc_hash()  argument
1381 	return hash_32((__force u32)im->multiaddr, MC_HASH_SZ_LOG);  in ip_mc_hash()
1385 			   struct ip_mc_list *im)  in ip_mc_hash_add()  argument
1392 		hash = ip_mc_hash(im);  in ip_mc_hash_add()
1393 		im->next_hash = mc_hash[hash];  in ip_mc_hash_add()
1394 		rcu_assign_pointer(mc_hash[hash], im);  in ip_mc_hash_add()
1407 	for_each_pmc_rtnl(in_dev, im) {  in ip_mc_hash_add()
1408 		hash = ip_mc_hash(im);  in ip_mc_hash_add()
1409 		im->next_hash = mc_hash[hash];  in ip_mc_hash_add()
1410 		RCU_INIT_POINTER(mc_hash[hash], im);  in ip_mc_hash_add()
1417 			      struct ip_mc_list *im)  in ip_mc_hash_remove()  argument
1424 	mc_hash += ip_mc_hash(im);  in ip_mc_hash_remove()
1425 	while ((aux = rtnl_dereference(*mc_hash)) != im)  in ip_mc_hash_remove()
1427 	*mc_hash = im->next_hash;  in ip_mc_hash_remove()
1437 	struct ip_mc_list *im;  in ____ip_mc_inc_group()  local
1441 	for_each_pmc_rtnl(in_dev, im) {  in ____ip_mc_inc_group()
1442 		if (im->multiaddr == addr) {  in ____ip_mc_inc_group()
1443 			im->users++;  in ____ip_mc_inc_group()
1449 	im = kzalloc(sizeof(*im), gfp);  in ____ip_mc_inc_group()
1450 	if (!im)  in ____ip_mc_inc_group()
1453 	im->users = 1;  in ____ip_mc_inc_group()
1454 	im->interface = in_dev;  in ____ip_mc_inc_group()
1456 	im->multiaddr = addr;  in ____ip_mc_inc_group()
1458 	im->sfmode = mode;  in ____ip_mc_inc_group()
1459 	im->sfcount[mode] = 1;  in ____ip_mc_inc_group()
1460 	refcount_set(&im->refcnt, 1);  in ____ip_mc_inc_group()
1461 	spin_lock_init(&im->lock);  in ____ip_mc_inc_group()
1463 	timer_setup(&im->timer, igmp_timer_expire, 0);  in ____ip_mc_inc_group()
1466 	im->next_rcu = in_dev->mc_list;  in ____ip_mc_inc_group()
1468 	rcu_assign_pointer(in_dev->mc_list, im);  in ____ip_mc_inc_group()
1470 	ip_mc_hash_add(in_dev, im);  in ____ip_mc_inc_group()
1473 	igmpv3_del_delrec(in_dev, im);  in ____ip_mc_inc_group()
1475 	igmp_group_added(im);  in ____ip_mc_inc_group()
1642 	struct ip_mc_list *im;  in ip_mc_rejoin_groups()  local
1648 	for_each_pmc_rtnl(in_dev, im) {  in ip_mc_rejoin_groups()
1649 		if (im->multiaddr == IGMP_ALL_HOSTS)  in ip_mc_rejoin_groups()
1651 		if (ipv4_is_local_multicast(im->multiaddr) &&  in ip_mc_rejoin_groups()
1664 		igmp_send_report(in_dev, im, type);  in ip_mc_rejoin_groups()
2717 	struct ip_mc_list *im;  in ip_check_mc_rcu()  local
2726 		for (im = rcu_dereference(mc_hash[hash]);  in ip_check_mc_rcu()
2727 		     im != NULL;  in ip_check_mc_rcu()
2728 		     im = rcu_dereference(im->next_hash)) {  in ip_check_mc_rcu()
2729 			if (im->multiaddr == mc_addr)  in ip_check_mc_rcu()
2733 		for_each_pmc_rcu(in_dev, im) {  in ip_check_mc_rcu()
2734 			if (im->multiaddr == mc_addr)  in ip_check_mc_rcu()
2738 	if (im && proto == IPPROTO_IGMP) {  in ip_check_mc_rcu()
2740 	} else if (im) {  in ip_check_mc_rcu()
2742 			spin_lock_bh(&im->lock);  in ip_check_mc_rcu()
2743 			for (psf = im->sources; psf; psf = psf->sf_next) {  in ip_check_mc_rcu()
2750 					im->sfcount[MCAST_EXCLUDE];  in ip_check_mc_rcu()
2752 				rv = im->sfcount[MCAST_EXCLUDE] != 0;  in ip_check_mc_rcu()
2753 			spin_unlock_bh(&im->lock);  in ip_check_mc_rcu()
2772 	struct ip_mc_list *im = NULL;  in igmp_mc_get_first()  local
2782 		im = rcu_dereference(in_dev->mc_list);  in igmp_mc_get_first()
2783 		if (im) {  in igmp_mc_get_first()
2788 	return im;  in igmp_mc_get_first()
2791 static struct ip_mc_list *igmp_mc_get_next(struct seq_file *seq, struct ip_mc_list *im)  in igmp_mc_get_next()  argument
2795 	im = rcu_dereference(im->next_rcu);  in igmp_mc_get_next()
2796 	while (!im) {  in igmp_mc_get_next()
2805 		im = rcu_dereference(state->in_dev->mc_list);  in igmp_mc_get_next()
2807 	return im;  in igmp_mc_get_next()
2812 	struct ip_mc_list *im = igmp_mc_get_first(seq);  in igmp_mc_get_idx()  local
2813 	if (im)  in igmp_mc_get_idx()
2814 		while (pos && (im = igmp_mc_get_next(seq, im)) != NULL)  in igmp_mc_get_idx()
2816 	return pos ? NULL : im;  in igmp_mc_get_idx()
2828 	struct ip_mc_list *im;  in igmp_mc_seq_next()  local
2830 		im = igmp_mc_get_first(seq);  in igmp_mc_seq_next()
2832 		im = igmp_mc_get_next(seq, v);  in igmp_mc_seq_next()
2834 	return im;  in igmp_mc_seq_next()
2853 		struct ip_mc_list *im = v;  in igmp_mc_seq_show()  local
2866 		if (rcu_access_pointer(state->in_dev->mc_list) == im) {  in igmp_mc_seq_show()
2871 		delta = im->timer.expires - jiffies;  in igmp_mc_seq_show()
2874 			   im->multiaddr, im->users,  in igmp_mc_seq_show()
2875 			   im->tm_running,  in igmp_mc_seq_show()
2876 			   im->tm_running ? jiffies_delta_to_clock_t(delta) : 0,  in igmp_mc_seq_show()
2877 			   im->reporter);  in igmp_mc_seq_show()
2893 	struct ip_mc_list *im;  member
2902 	struct ip_mc_list *im = NULL;  in igmp_mcf_get_first()  local
2906 	state->im = NULL;  in igmp_mcf_get_first()
2912 		im = rcu_dereference(idev->mc_list);  in igmp_mcf_get_first()
2913 		if (likely(im)) {  in igmp_mcf_get_first()
2914 			spin_lock_bh(&im->lock);  in igmp_mcf_get_first()
2915 			psf = im->sources;  in igmp_mcf_get_first()
2917 				state->im = im;  in igmp_mcf_get_first()
2921 			spin_unlock_bh(&im->lock);  in igmp_mcf_get_first()
2933 		spin_unlock_bh(&state->im->lock);  in igmp_mcf_get_next()
2934 		state->im = state->im->next;  in igmp_mcf_get_next()
2935 		while (!state->im) {  in igmp_mcf_get_next()
2944 			state->im = rcu_dereference(state->idev->mc_list);  in igmp_mcf_get_next()
2946 		if (!state->im)  in igmp_mcf_get_next()
2948 		spin_lock_bh(&state->im->lock);  in igmp_mcf_get_next()
2949 		psf = state->im->sources;  in igmp_mcf_get_next()
2986 	if (likely(state->im)) {  in igmp_mcf_seq_stop()
2987 		spin_unlock_bh(&state->im->lock);  in igmp_mcf_seq_stop()
2988 		state->im = NULL;  in igmp_mcf_seq_stop()
3007 			   ntohl(state->im->multiaddr),  in igmp_mcf_seq_show()