158 static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im,
160 static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im);
169 static void ip_ma_put(struct ip_mc_list *im)  in ip_ma_put()  argument
171 	if (refcount_dec_and_test(&im->refcnt)) {  in ip_ma_put()
172 		in_dev_put(im->interface);  in ip_ma_put()
173 		kfree_rcu(im, rcu);  in ip_ma_put()
204 static void igmp_stop_timer(struct ip_mc_list *im)  in igmp_stop_timer()  argument
206 	spin_lock_bh(&im->lock);  in igmp_stop_timer()
207 	if (del_timer(&im->timer))  in igmp_stop_timer()
208 		refcount_dec(&im->refcnt);  in igmp_stop_timer()
209 	im->tm_running = 0;  in igmp_stop_timer()
210 	im->reporter = 0;  in igmp_stop_timer()
211 	im->unsolicit_count = 0;  in igmp_stop_timer()
212 	spin_unlock_bh(&im->lock);  in igmp_stop_timer()
216 static void igmp_start_timer(struct ip_mc_list *im, int max_delay)  in igmp_start_timer()  argument
220 	im->tm_running = 1;  in igmp_start_timer()
221 	if (!mod_timer(&im->timer, jiffies+tv+2))  in igmp_start_timer()
222 		refcount_inc(&im->refcnt);  in igmp_start_timer()
247 static void igmp_mod_timer(struct ip_mc_list *im, int max_delay)  in igmp_mod_timer()  argument
249 	spin_lock_bh(&im->lock);  in igmp_mod_timer()
250 	im->unsolicit_count = 0;  in igmp_mod_timer()
251 	if (del_timer(&im->timer)) {  in igmp_mod_timer()
252 		if ((long)(im->timer.expires-jiffies) < max_delay) {  in igmp_mod_timer()
253 			add_timer(&im->timer);  in igmp_mod_timer()
254 			im->tm_running = 1;  in igmp_mod_timer()
255 			spin_unlock_bh(&im->lock);  in igmp_mod_timer()
258 		refcount_dec(&im->refcnt);  in igmp_mod_timer()
260 	igmp_start_timer(im, max_delay);  in igmp_mod_timer()
261 	spin_unlock_bh(&im->lock);  in igmp_mod_timer()
830 	struct ip_mc_list *im = from_timer(im, t, timer);  in igmp_timer_expire()  local
831 	struct in_device *in_dev = im->interface;  in igmp_timer_expire()
833 	spin_lock(&im->lock);  in igmp_timer_expire()
834 	im->tm_running = 0;  in igmp_timer_expire()
836 	if (im->unsolicit_count && --im->unsolicit_count)  in igmp_timer_expire()
837 		igmp_start_timer(im, unsolicited_report_interval(in_dev));  in igmp_timer_expire()
839 	im->reporter = 1;  in igmp_timer_expire()
840 	spin_unlock(&im->lock);  in igmp_timer_expire()
843 		igmp_send_report(in_dev, im, IGMP_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
845 		igmp_send_report(in_dev, im, IGMPV2_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
847 		igmp_send_report(in_dev, im, IGMPV3_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
849 	ip_ma_put(im);  in igmp_timer_expire()
911 	struct ip_mc_list *im;  in igmp_heard_report()  local
922 	for_each_pmc_rcu(in_dev, im) {  in igmp_heard_report()
923 		if (im->multiaddr == group) {  in igmp_heard_report()
924 			igmp_stop_timer(im);  in igmp_heard_report()
938 	struct ip_mc_list	*im;  in igmp_heard_query()  local
1035 	for_each_pmc_rcu(in_dev, im) {  in igmp_heard_query()
1038 		if (group && group != im->multiaddr)  in igmp_heard_query()
1040 		if (im->multiaddr == IGMP_ALL_HOSTS)  in igmp_heard_query()
1042 		if (ipv4_is_local_multicast(im->multiaddr) &&  in igmp_heard_query()
1045 		spin_lock_bh(&im->lock);  in igmp_heard_query()
1046 		if (im->tm_running)  in igmp_heard_query()
1047 			im->gsquery = im->gsquery && mark;  in igmp_heard_query()
1049 			im->gsquery = mark;  in igmp_heard_query()
1050 		changed = !im->gsquery ||  in igmp_heard_query()
1051 			igmp_marksources(im, ntohs(ih3->nsrcs), ih3->srcs);  in igmp_heard_query()
1052 		spin_unlock_bh(&im->lock);  in igmp_heard_query()
1054 			igmp_mod_timer(im, max_delay);  in igmp_heard_query()
1164 static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im,  in igmpv3_add_delrec()  argument
1180 	spin_lock_bh(&im->lock);  in igmpv3_add_delrec()
1181 	pmc->interface = im->interface;  in igmpv3_add_delrec()
1183 	pmc->multiaddr = im->multiaddr;  in igmpv3_add_delrec()
1185 	pmc->sfmode = im->sfmode;  in igmpv3_add_delrec()
1189 		pmc->tomb = im->tomb;  in igmpv3_add_delrec()
1190 		pmc->sources = im->sources;  in igmpv3_add_delrec()
1191 		im->tomb = im->sources = NULL;  in igmpv3_add_delrec()
1195 	spin_unlock_bh(&im->lock);  in igmpv3_add_delrec()
1206 static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im)  in igmpv3_del_delrec()  argument
1211 	__be32 multiaddr = im->multiaddr;  in igmpv3_del_delrec()
1228 	spin_lock_bh(&im->lock);  in igmpv3_del_delrec()
1230 		im->interface = pmc->interface;  in igmpv3_del_delrec()
1231 		if (im->sfmode == MCAST_INCLUDE) {  in igmpv3_del_delrec()
1232 			swap(im->tomb, pmc->tomb);  in igmpv3_del_delrec()
1233 			swap(im->sources, pmc->sources);  in igmpv3_del_delrec()
1234 			for (psf = im->sources; psf; psf = psf->sf_next)  in igmpv3_del_delrec()
1237 			im->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;  in igmpv3_del_delrec()
1242 	spin_unlock_bh(&im->lock);  in igmpv3_del_delrec()
1278 static void __igmp_group_dropped(struct ip_mc_list *im, gfp_t gfp)  in __igmp_group_dropped()  argument
1280 	struct in_device *in_dev = im->interface;  in __igmp_group_dropped()
1286 	if (im->loaded) {  in __igmp_group_dropped()
1287 		im->loaded = 0;  in __igmp_group_dropped()
1288 		ip_mc_filter_del(in_dev, im->multiaddr);  in __igmp_group_dropped()
1292 	if (im->multiaddr == IGMP_ALL_HOSTS)  in __igmp_group_dropped()
1294 	if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)  in __igmp_group_dropped()
1297 	reporter = im->reporter;  in __igmp_group_dropped()
1298 	igmp_stop_timer(im);  in __igmp_group_dropped()
1305 				igmp_send_report(in_dev, im, IGMP_HOST_LEAVE_MESSAGE);  in __igmp_group_dropped()
1309 		igmpv3_add_delrec(in_dev, im, gfp);  in __igmp_group_dropped()
1316 static void igmp_group_dropped(struct ip_mc_list *im)  in igmp_group_dropped()  argument
1318 	__igmp_group_dropped(im, GFP_KERNEL);  in igmp_group_dropped()
1321 static void igmp_group_added(struct ip_mc_list *im)  in igmp_group_added()  argument
1323 	struct in_device *in_dev = im->interface;  in igmp_group_added()
1328 	if (im->loaded == 0) {  in igmp_group_added()
1329 		im->loaded = 1;  in igmp_group_added()
1330 		ip_mc_filter_add(in_dev, im->multiaddr);  in igmp_group_added()
1334 	if (im->multiaddr == IGMP_ALL_HOSTS)  in igmp_group_added()
1336 	if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)  in igmp_group_added()
1342 	im->unsolicit_count = net->ipv4.sysctl_igmp_qrv;  in igmp_group_added()
1344 		spin_lock_bh(&im->lock);  in igmp_group_added()
1345 		igmp_start_timer(im, IGMP_INITIAL_REPORT_DELAY);  in igmp_group_added()
1346 		spin_unlock_bh(&im->lock);  in igmp_group_added()
1355 	if (im->sfmode == MCAST_EXCLUDE)  in igmp_group_added()
1356 		im->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;  in igmp_group_added()
1367 static u32 ip_mc_hash(const struct ip_mc_list *im)  in ip_mc_hash()  argument
1369 	return hash_32((__force u32)im->multiaddr, MC_HASH_SZ_LOG);  in ip_mc_hash()
1373 			   struct ip_mc_list *im)  in ip_mc_hash_add()  argument
1380 		hash = ip_mc_hash(im);  in ip_mc_hash_add()
1381 		im->next_hash = mc_hash[hash];  in ip_mc_hash_add()
1382 		rcu_assign_pointer(mc_hash[hash], im);  in ip_mc_hash_add()
1395 	for_each_pmc_rtnl(in_dev, im) {  in ip_mc_hash_add()
1396 		hash = ip_mc_hash(im);  in ip_mc_hash_add()
1397 		im->next_hash = mc_hash[hash];  in ip_mc_hash_add()
1398 		RCU_INIT_POINTER(mc_hash[hash], im);  in ip_mc_hash_add()
1405 			      struct ip_mc_list *im)  in ip_mc_hash_remove()  argument
1412 	mc_hash += ip_mc_hash(im);  in ip_mc_hash_remove()
1413 	while ((aux = rtnl_dereference(*mc_hash)) != im)  in ip_mc_hash_remove()
1415 	*mc_hash = im->next_hash;  in ip_mc_hash_remove()
1425 	struct ip_mc_list *im;  in ____ip_mc_inc_group()  local
1429 	for_each_pmc_rtnl(in_dev, im) {  in ____ip_mc_inc_group()
1430 		if (im->multiaddr == addr) {  in ____ip_mc_inc_group()
1431 			im->users++;  in ____ip_mc_inc_group()
1437 	im = kzalloc(sizeof(*im), gfp);  in ____ip_mc_inc_group()
1438 	if (!im)  in ____ip_mc_inc_group()
1441 	im->users = 1;  in ____ip_mc_inc_group()
1442 	im->interface = in_dev;  in ____ip_mc_inc_group()
1444 	im->multiaddr = addr;  in ____ip_mc_inc_group()
1446 	im->sfmode = mode;  in ____ip_mc_inc_group()
1447 	im->sfcount[mode] = 1;  in ____ip_mc_inc_group()
1448 	refcount_set(&im->refcnt, 1);  in ____ip_mc_inc_group()
1449 	spin_lock_init(&im->lock);  in ____ip_mc_inc_group()
1451 	timer_setup(&im->timer, igmp_timer_expire, 0);  in ____ip_mc_inc_group()
1454 	im->next_rcu = in_dev->mc_list;  in ____ip_mc_inc_group()
1456 	rcu_assign_pointer(in_dev->mc_list, im);  in ____ip_mc_inc_group()
1458 	ip_mc_hash_add(in_dev, im);  in ____ip_mc_inc_group()
1461 	igmpv3_del_delrec(in_dev, im);  in ____ip_mc_inc_group()
1463 	igmp_group_added(im);  in ____ip_mc_inc_group()
1630 	struct ip_mc_list *im;  in ip_mc_rejoin_groups()  local
1636 	for_each_pmc_rtnl(in_dev, im) {  in ip_mc_rejoin_groups()
1637 		if (im->multiaddr == IGMP_ALL_HOSTS)  in ip_mc_rejoin_groups()
1639 		if (ipv4_is_local_multicast(im->multiaddr) &&  in ip_mc_rejoin_groups()
1652 		igmp_send_report(in_dev, im, type);  in ip_mc_rejoin_groups()
2700 	struct ip_mc_list *im;  in ip_check_mc_rcu()  local
2709 		for (im = rcu_dereference(mc_hash[hash]);  in ip_check_mc_rcu()
2710 		     im != NULL;  in ip_check_mc_rcu()
2711 		     im = rcu_dereference(im->next_hash)) {  in ip_check_mc_rcu()
2712 			if (im->multiaddr == mc_addr)  in ip_check_mc_rcu()
2716 		for_each_pmc_rcu(in_dev, im) {  in ip_check_mc_rcu()
2717 			if (im->multiaddr == mc_addr)  in ip_check_mc_rcu()
2721 	if (im && proto == IPPROTO_IGMP) {  in ip_check_mc_rcu()
2723 	} else if (im) {  in ip_check_mc_rcu()
2725 			for (psf = im->sources; psf; psf = psf->sf_next) {  in ip_check_mc_rcu()
2732 					im->sfcount[MCAST_EXCLUDE];  in ip_check_mc_rcu()
2734 				rv = im->sfcount[MCAST_EXCLUDE] != 0;  in ip_check_mc_rcu()
2753 	struct ip_mc_list *im = NULL;  in igmp_mc_get_first()  local
2763 		im = rcu_dereference(in_dev->mc_list);  in igmp_mc_get_first()
2764 		if (im) {  in igmp_mc_get_first()
2769 	return im;  in igmp_mc_get_first()
2772 static struct ip_mc_list *igmp_mc_get_next(struct seq_file *seq, struct ip_mc_list *im)  in igmp_mc_get_next()  argument
2776 	im = rcu_dereference(im->next_rcu);  in igmp_mc_get_next()
2777 	while (!im) {  in igmp_mc_get_next()
2786 		im = rcu_dereference(state->in_dev->mc_list);  in igmp_mc_get_next()
2788 	return im;  in igmp_mc_get_next()
2793 	struct ip_mc_list *im = igmp_mc_get_first(seq);  in igmp_mc_get_idx()  local
2794 	if (im)  in igmp_mc_get_idx()
2795 		while (pos && (im = igmp_mc_get_next(seq, im)) != NULL)  in igmp_mc_get_idx()
2797 	return pos ? NULL : im;  in igmp_mc_get_idx()
2809 	struct ip_mc_list *im;  in igmp_mc_seq_next()  local
2811 		im = igmp_mc_get_first(seq);  in igmp_mc_seq_next()
2813 		im = igmp_mc_get_next(seq, v);  in igmp_mc_seq_next()
2815 	return im;  in igmp_mc_seq_next()
2834 		struct ip_mc_list *im = (struct ip_mc_list *)v;  in igmp_mc_seq_show()  local
2847 		if (rcu_access_pointer(state->in_dev->mc_list) == im) {  in igmp_mc_seq_show()
2852 		delta = im->timer.expires - jiffies;  in igmp_mc_seq_show()
2855 			   im->multiaddr, im->users,  in igmp_mc_seq_show()
2856 			   im->tm_running,  in igmp_mc_seq_show()
2857 			   im->tm_running ? jiffies_delta_to_clock_t(delta) : 0,  in igmp_mc_seq_show()
2858 			   im->reporter);  in igmp_mc_seq_show()
2874 	struct ip_mc_list *im;  member
2883 	struct ip_mc_list *im = NULL;  in igmp_mcf_get_first()  local
2887 	state->im = NULL;  in igmp_mcf_get_first()
2893 		im = rcu_dereference(idev->mc_list);  in igmp_mcf_get_first()
2894 		if (likely(im)) {  in igmp_mcf_get_first()
2895 			spin_lock_bh(&im->lock);  in igmp_mcf_get_first()
2896 			psf = im->sources;  in igmp_mcf_get_first()
2898 				state->im = im;  in igmp_mcf_get_first()
2902 			spin_unlock_bh(&im->lock);  in igmp_mcf_get_first()
2914 		spin_unlock_bh(&state->im->lock);  in igmp_mcf_get_next()
2915 		state->im = state->im->next;  in igmp_mcf_get_next()
2916 		while (!state->im) {  in igmp_mcf_get_next()
2925 			state->im = rcu_dereference(state->idev->mc_list);  in igmp_mcf_get_next()
2927 		if (!state->im)  in igmp_mcf_get_next()
2929 		spin_lock_bh(&state->im->lock);  in igmp_mcf_get_next()
2930 		psf = state->im->sources;  in igmp_mcf_get_next()
2967 	if (likely(state->im)) {  in igmp_mcf_seq_stop()
2968 		spin_unlock_bh(&state->im->lock);  in igmp_mcf_seq_stop()
2969 		state->im = NULL;  in igmp_mcf_seq_stop()
2988 			   ntohl(state->im->multiaddr),  in igmp_mcf_seq_show()