170 static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im);
180 static void ip_ma_put(struct ip_mc_list *im)  in ip_ma_put()  argument
182 	if (atomic_dec_and_test(&im->refcnt)) {  in ip_ma_put()
183 		in_dev_put(im->interface);  in ip_ma_put()
184 		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 		atomic_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 		atomic_inc(&im->refcnt);  in igmp_start_timer()
242 static void igmp_mod_timer(struct ip_mc_list *im, int max_delay)  in igmp_mod_timer()  argument
244 	spin_lock_bh(&im->lock);  in igmp_mod_timer()
245 	im->unsolicit_count = 0;  in igmp_mod_timer()
246 	if (del_timer(&im->timer)) {  in igmp_mod_timer()
247 		if ((long)(im->timer.expires-jiffies) < max_delay) {  in igmp_mod_timer()
248 			add_timer(&im->timer);  in igmp_mod_timer()
249 			im->tm_running = 1;  in igmp_mod_timer()
250 			spin_unlock_bh(&im->lock);  in igmp_mod_timer()
253 		atomic_dec(&im->refcnt);  in igmp_mod_timer()
255 	igmp_start_timer(im, max_delay);  in igmp_mod_timer()
256 	spin_unlock_bh(&im->lock);  in igmp_mod_timer()
777 	struct ip_mc_list *im = (struct ip_mc_list *)data;  in igmp_timer_expire()  local
778 	struct in_device *in_dev = im->interface;  in igmp_timer_expire()
780 	spin_lock(&im->lock);  in igmp_timer_expire()
781 	im->tm_running = 0;  in igmp_timer_expire()
783 	if (im->unsolicit_count) {  in igmp_timer_expire()
784 		im->unsolicit_count--;  in igmp_timer_expire()
785 		igmp_start_timer(im, unsolicited_report_interval(in_dev));  in igmp_timer_expire()
787 	im->reporter = 1;  in igmp_timer_expire()
788 	spin_unlock(&im->lock);  in igmp_timer_expire()
791 		igmp_send_report(in_dev, im, IGMP_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
793 		igmp_send_report(in_dev, im, IGMPV2_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
795 		igmp_send_report(in_dev, im, IGMPV3_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
797 	ip_ma_put(im);  in igmp_timer_expire()
859 	struct ip_mc_list *im;  in igmp_heard_report()  local
869 	for_each_pmc_rcu(in_dev, im) {  in igmp_heard_report()
870 		if (im->multiaddr == group) {  in igmp_heard_report()
871 			igmp_stop_timer(im);  in igmp_heard_report()
885 	struct ip_mc_list	*im;  in igmp_heard_query()  local
966 	for_each_pmc_rcu(in_dev, im) {  in igmp_heard_query()
969 		if (group && group != im->multiaddr)  in igmp_heard_query()
971 		if (im->multiaddr == IGMP_ALL_HOSTS)  in igmp_heard_query()
973 		if (ipv4_is_local_multicast(im->multiaddr) &&  in igmp_heard_query()
976 		spin_lock_bh(&im->lock);  in igmp_heard_query()
977 		if (im->tm_running)  in igmp_heard_query()
978 			im->gsquery = im->gsquery && mark;  in igmp_heard_query()
980 			im->gsquery = mark;  in igmp_heard_query()
981 		changed = !im->gsquery ||  in igmp_heard_query()
982 			igmp_marksources(im, ntohs(ih3->nsrcs), ih3->srcs);  in igmp_heard_query()
983 		spin_unlock_bh(&im->lock);  in igmp_heard_query()
985 			igmp_mod_timer(im, max_delay);  in igmp_heard_query()
1087 static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im)  in igmpv3_add_delrec()  argument
1100 	spin_lock_bh(&im->lock);  in igmpv3_add_delrec()
1101 	pmc->interface = im->interface;  in igmpv3_add_delrec()
1103 	pmc->multiaddr = im->multiaddr;  in igmpv3_add_delrec()
1105 	pmc->sfmode = im->sfmode;  in igmpv3_add_delrec()
1109 		pmc->tomb = im->tomb;  in igmpv3_add_delrec()
1110 		pmc->sources = im->sources;  in igmpv3_add_delrec()
1111 		im->tomb = im->sources = NULL;  in igmpv3_add_delrec()
1115 	spin_unlock_bh(&im->lock);  in igmpv3_add_delrec()
1185 static void igmp_group_dropped(struct ip_mc_list *im)  in igmp_group_dropped()  argument
1187 	struct in_device *in_dev = im->interface;  in igmp_group_dropped()
1192 	if (im->loaded) {  in igmp_group_dropped()
1193 		im->loaded = 0;  in igmp_group_dropped()
1194 		ip_mc_filter_del(in_dev, im->multiaddr);  in igmp_group_dropped()
1198 	if (im->multiaddr == IGMP_ALL_HOSTS)  in igmp_group_dropped()
1200 	if (ipv4_is_local_multicast(im->multiaddr) && !sysctl_igmp_llm_reports)  in igmp_group_dropped()
1203 	reporter = im->reporter;  in igmp_group_dropped()
1204 	igmp_stop_timer(im);  in igmp_group_dropped()
1211 				igmp_send_report(in_dev, im, IGMP_HOST_LEAVE_MESSAGE);  in igmp_group_dropped()
1215 		igmpv3_add_delrec(in_dev, im);  in igmp_group_dropped()
1222 static void igmp_group_added(struct ip_mc_list *im)  in igmp_group_added()  argument
1224 	struct in_device *in_dev = im->interface;  in igmp_group_added()
1226 	if (im->loaded == 0) {  in igmp_group_added()
1227 		im->loaded = 1;  in igmp_group_added()
1228 		ip_mc_filter_add(in_dev, im->multiaddr);  in igmp_group_added()
1232 	if (im->multiaddr == IGMP_ALL_HOSTS)  in igmp_group_added()
1234 	if (ipv4_is_local_multicast(im->multiaddr) && !sysctl_igmp_llm_reports)  in igmp_group_added()
1240 		spin_lock_bh(&im->lock);  in igmp_group_added()
1241 		igmp_start_timer(im, IGMP_INITIAL_REPORT_DELAY);  in igmp_group_added()
1242 		spin_unlock_bh(&im->lock);  in igmp_group_added()
1247 	im->crcount = in_dev->mr_qrv ?: sysctl_igmp_qrv;  in igmp_group_added()
1257 static u32 ip_mc_hash(const struct ip_mc_list *im)  in ip_mc_hash()  argument
1259 	return hash_32((__force u32)im->multiaddr, MC_HASH_SZ_LOG);  in ip_mc_hash()
1263 			   struct ip_mc_list *im)  in ip_mc_hash_add()  argument
1270 		hash = ip_mc_hash(im);  in ip_mc_hash_add()
1271 		im->next_hash = mc_hash[hash];  in ip_mc_hash_add()
1272 		rcu_assign_pointer(mc_hash[hash], im);  in ip_mc_hash_add()
1285 	for_each_pmc_rtnl(in_dev, im) {  in ip_mc_hash_add()
1286 		hash = ip_mc_hash(im);  in ip_mc_hash_add()
1287 		im->next_hash = mc_hash[hash];  in ip_mc_hash_add()
1288 		RCU_INIT_POINTER(mc_hash[hash], im);  in ip_mc_hash_add()
1295 			      struct ip_mc_list *im)  in ip_mc_hash_remove()  argument
1302 	mc_hash += ip_mc_hash(im);  in ip_mc_hash_remove()
1303 	while ((aux = rtnl_dereference(*mc_hash)) != im)  in ip_mc_hash_remove()
1305 	*mc_hash = im->next_hash;  in ip_mc_hash_remove()
1315 	struct ip_mc_list *im;  in ip_mc_inc_group()  local
1319 	for_each_pmc_rtnl(in_dev, im) {  in ip_mc_inc_group()
1320 		if (im->multiaddr == addr) {  in ip_mc_inc_group()
1321 			im->users++;  in ip_mc_inc_group()
1327 	im = kzalloc(sizeof(*im), GFP_KERNEL);  in ip_mc_inc_group()
1328 	if (!im)  in ip_mc_inc_group()
1331 	im->users = 1;  in ip_mc_inc_group()
1332 	im->interface = in_dev;  in ip_mc_inc_group()
1334 	im->multiaddr = addr;  in ip_mc_inc_group()
1336 	im->sfmode = MCAST_EXCLUDE;  in ip_mc_inc_group()
1337 	im->sfcount[MCAST_EXCLUDE] = 1;  in ip_mc_inc_group()
1338 	atomic_set(&im->refcnt, 1);  in ip_mc_inc_group()
1339 	spin_lock_init(&im->lock);  in ip_mc_inc_group()
1341 	setup_timer(&im->timer, igmp_timer_expire, (unsigned long)im);  in ip_mc_inc_group()
1342 	im->unsolicit_count = sysctl_igmp_qrv;  in ip_mc_inc_group()
1345 	im->next_rcu = in_dev->mc_list;  in ip_mc_inc_group()
1347 	rcu_assign_pointer(in_dev->mc_list, im);  in ip_mc_inc_group()
1349 	ip_mc_hash_add(in_dev, im);  in ip_mc_inc_group()
1352 	igmpv3_del_delrec(in_dev, im->multiaddr);  in ip_mc_inc_group()
1354 	igmp_group_added(im);  in ip_mc_inc_group()
1533 	struct ip_mc_list *im;  in ip_mc_rejoin_groups()  local
1538 	for_each_pmc_rtnl(in_dev, im) {  in ip_mc_rejoin_groups()
1539 		if (im->multiaddr == IGMP_ALL_HOSTS)  in ip_mc_rejoin_groups()
1541 		if (ipv4_is_local_multicast(im->multiaddr) &&  in ip_mc_rejoin_groups()
1554 		igmp_send_report(in_dev, im, type);  in ip_mc_rejoin_groups()
2570 	struct ip_mc_list *im;  in ip_check_mc_rcu()  local
2579 		for (im = rcu_dereference(mc_hash[hash]);  in ip_check_mc_rcu()
2580 		     im != NULL;  in ip_check_mc_rcu()
2581 		     im = rcu_dereference(im->next_hash)) {  in ip_check_mc_rcu()
2582 			if (im->multiaddr == mc_addr)  in ip_check_mc_rcu()
2586 		for_each_pmc_rcu(in_dev, im) {  in ip_check_mc_rcu()
2587 			if (im->multiaddr == mc_addr)  in ip_check_mc_rcu()
2591 	if (im && proto == IPPROTO_IGMP) {  in ip_check_mc_rcu()
2593 	} else if (im) {  in ip_check_mc_rcu()
2595 			for (psf = im->sources; psf; psf = psf->sf_next) {  in ip_check_mc_rcu()
2602 					im->sfcount[MCAST_EXCLUDE];  in ip_check_mc_rcu()
2604 				rv = im->sfcount[MCAST_EXCLUDE] != 0;  in ip_check_mc_rcu()
2623 	struct ip_mc_list *im = NULL;  in igmp_mc_get_first()  local
2633 		im = rcu_dereference(in_dev->mc_list);  in igmp_mc_get_first()
2634 		if (im) {  in igmp_mc_get_first()
2639 	return im;  in igmp_mc_get_first()
2642 static struct ip_mc_list *igmp_mc_get_next(struct seq_file *seq, struct ip_mc_list *im)  in igmp_mc_get_next()  argument
2646 	im = rcu_dereference(im->next_rcu);  in igmp_mc_get_next()
2647 	while (!im) {  in igmp_mc_get_next()
2656 		im = rcu_dereference(state->in_dev->mc_list);  in igmp_mc_get_next()
2658 	return im;  in igmp_mc_get_next()
2663 	struct ip_mc_list *im = igmp_mc_get_first(seq);  in igmp_mc_get_idx()  local
2664 	if (im)  in igmp_mc_get_idx()
2665 		while (pos && (im = igmp_mc_get_next(seq, im)) != NULL)  in igmp_mc_get_idx()
2667 	return pos ? NULL : im;  in igmp_mc_get_idx()
2679 	struct ip_mc_list *im;  in igmp_mc_seq_next()  local
2681 		im = igmp_mc_get_first(seq);  in igmp_mc_seq_next()
2683 		im = igmp_mc_get_next(seq, v);  in igmp_mc_seq_next()
2685 	return im;  in igmp_mc_seq_next()
2704 		struct ip_mc_list *im = (struct ip_mc_list *)v;  in igmp_mc_seq_show()  local
2717 		if (rcu_access_pointer(state->in_dev->mc_list) == im) {  in igmp_mc_seq_show()
2722 		delta = im->timer.expires - jiffies;  in igmp_mc_seq_show()
2725 			   im->multiaddr, im->users,  in igmp_mc_seq_show()
2726 			   im->tm_running,  in igmp_mc_seq_show()
2727 			   im->tm_running ? jiffies_delta_to_clock_t(delta) : 0,  in igmp_mc_seq_show()
2728 			   im->reporter);  in igmp_mc_seq_show()
2758 	struct ip_mc_list *im;  member
2767 	struct ip_mc_list *im = NULL;  in igmp_mcf_get_first()  local
2771 	state->im = NULL;  in igmp_mcf_get_first()
2777 		im = rcu_dereference(idev->mc_list);  in igmp_mcf_get_first()
2778 		if (likely(im)) {  in igmp_mcf_get_first()
2779 			spin_lock_bh(&im->lock);  in igmp_mcf_get_first()
2780 			psf = im->sources;  in igmp_mcf_get_first()
2782 				state->im = im;  in igmp_mcf_get_first()
2786 			spin_unlock_bh(&im->lock);  in igmp_mcf_get_first()
2798 		spin_unlock_bh(&state->im->lock);  in igmp_mcf_get_next()
2799 		state->im = state->im->next;  in igmp_mcf_get_next()
2800 		while (!state->im) {  in igmp_mcf_get_next()
2809 			state->im = rcu_dereference(state->idev->mc_list);  in igmp_mcf_get_next()
2811 		if (!state->im)  in igmp_mcf_get_next()
2813 		spin_lock_bh(&state->im->lock);  in igmp_mcf_get_next()
2814 		psf = state->im->sources;  in igmp_mcf_get_next()
2851 	if (likely(state->im)) {  in igmp_mcf_seq_stop()
2852 		spin_unlock_bh(&state->im->lock);  in igmp_mcf_seq_stop()
2853 		state->im = NULL;  in igmp_mcf_seq_stop()
2872 			   ntohl(state->im->multiaddr),  in igmp_mcf_seq_show()