165 static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im);
166 static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im);
175 static void ip_ma_put(struct ip_mc_list *im)  in ip_ma_put()  argument
177 	if (refcount_dec_and_test(&im->refcnt)) {  in ip_ma_put()
178 		in_dev_put(im->interface);  in ip_ma_put()
179 		kfree_rcu(im, rcu);  in ip_ma_put()
199 static void igmp_stop_timer(struct ip_mc_list *im)  in igmp_stop_timer()  argument
201 	spin_lock_bh(&im->lock);  in igmp_stop_timer()
202 	if (del_timer(&im->timer))  in igmp_stop_timer()
203 		refcount_dec(&im->refcnt);  in igmp_stop_timer()
204 	im->tm_running = 0;  in igmp_stop_timer()
205 	im->reporter = 0;  in igmp_stop_timer()
206 	im->unsolicit_count = 0;  in igmp_stop_timer()
207 	spin_unlock_bh(&im->lock);  in igmp_stop_timer()
211 static void igmp_start_timer(struct ip_mc_list *im, int max_delay)  in igmp_start_timer()  argument
215 	im->tm_running = 1;  in igmp_start_timer()
216 	if (!mod_timer(&im->timer, jiffies+tv+2))  in igmp_start_timer()
217 		refcount_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 		refcount_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()
817 	struct ip_mc_list *im = from_timer(im, t, timer);  in igmp_timer_expire()  local
818 	struct in_device *in_dev = im->interface;  in igmp_timer_expire()
820 	spin_lock(&im->lock);  in igmp_timer_expire()
821 	im->tm_running = 0;  in igmp_timer_expire()
823 	if (im->unsolicit_count && --im->unsolicit_count)  in igmp_timer_expire()
824 		igmp_start_timer(im, unsolicited_report_interval(in_dev));  in igmp_timer_expire()
826 	im->reporter = 1;  in igmp_timer_expire()
827 	spin_unlock(&im->lock);  in igmp_timer_expire()
830 		igmp_send_report(in_dev, im, IGMP_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
832 		igmp_send_report(in_dev, im, IGMPV2_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
834 		igmp_send_report(in_dev, im, IGMPV3_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
836 	ip_ma_put(im);  in igmp_timer_expire()
898 	struct ip_mc_list *im;  in igmp_heard_report()  local
909 	for_each_pmc_rcu(in_dev, im) {  in igmp_heard_report()
910 		if (im->multiaddr == group) {  in igmp_heard_report()
911 			igmp_stop_timer(im);  in igmp_heard_report()
925 	struct ip_mc_list	*im;  in igmp_heard_query()  local
1007 	for_each_pmc_rcu(in_dev, im) {  in igmp_heard_query()
1010 		if (group && group != im->multiaddr)  in igmp_heard_query()
1012 		if (im->multiaddr == IGMP_ALL_HOSTS)  in igmp_heard_query()
1014 		if (ipv4_is_local_multicast(im->multiaddr) &&  in igmp_heard_query()
1017 		spin_lock_bh(&im->lock);  in igmp_heard_query()
1018 		if (im->tm_running)  in igmp_heard_query()
1019 			im->gsquery = im->gsquery && mark;  in igmp_heard_query()
1021 			im->gsquery = mark;  in igmp_heard_query()
1022 		changed = !im->gsquery ||  in igmp_heard_query()
1023 			igmp_marksources(im, ntohs(ih3->nsrcs), ih3->srcs);  in igmp_heard_query()
1024 		spin_unlock_bh(&im->lock);  in igmp_heard_query()
1026 			igmp_mod_timer(im, max_delay);  in igmp_heard_query()
1136 static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im)  in igmpv3_add_delrec()  argument
1151 	spin_lock_bh(&im->lock);  in igmpv3_add_delrec()
1152 	pmc->interface = im->interface;  in igmpv3_add_delrec()
1154 	pmc->multiaddr = im->multiaddr;  in igmpv3_add_delrec()
1156 	pmc->sfmode = im->sfmode;  in igmpv3_add_delrec()
1160 		pmc->tomb = im->tomb;  in igmpv3_add_delrec()
1161 		pmc->sources = im->sources;  in igmpv3_add_delrec()
1162 		im->tomb = im->sources = NULL;  in igmpv3_add_delrec()
1166 	spin_unlock_bh(&im->lock);  in igmpv3_add_delrec()
1177 static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im)  in igmpv3_del_delrec()  argument
1182 	__be32 multiaddr = im->multiaddr;  in igmpv3_del_delrec()
1199 	spin_lock_bh(&im->lock);  in igmpv3_del_delrec()
1201 		im->interface = pmc->interface;  in igmpv3_del_delrec()
1202 		if (im->sfmode == MCAST_INCLUDE) {  in igmpv3_del_delrec()
1203 			im->tomb = pmc->tomb;  in igmpv3_del_delrec()
1204 			im->sources = pmc->sources;  in igmpv3_del_delrec()
1205 			for (psf = im->sources; psf; psf = psf->sf_next)  in igmpv3_del_delrec()
1208 			im->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;  in igmpv3_del_delrec()
1213 	spin_unlock_bh(&im->lock);  in igmpv3_del_delrec()
1252 static void igmp_group_dropped(struct ip_mc_list *im)  in igmp_group_dropped()  argument
1254 	struct in_device *in_dev = im->interface;  in igmp_group_dropped()
1260 	if (im->loaded) {  in igmp_group_dropped()
1261 		im->loaded = 0;  in igmp_group_dropped()
1262 		ip_mc_filter_del(in_dev, im->multiaddr);  in igmp_group_dropped()
1266 	if (im->multiaddr == IGMP_ALL_HOSTS)  in igmp_group_dropped()
1268 	if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)  in igmp_group_dropped()
1271 	reporter = im->reporter;  in igmp_group_dropped()
1272 	igmp_stop_timer(im);  in igmp_group_dropped()
1279 				igmp_send_report(in_dev, im, IGMP_HOST_LEAVE_MESSAGE);  in igmp_group_dropped()
1283 		igmpv3_add_delrec(in_dev, im);  in igmp_group_dropped()
1290 static void igmp_group_added(struct ip_mc_list *im)  in igmp_group_added()  argument
1292 	struct in_device *in_dev = im->interface;  in igmp_group_added()
1297 	if (im->loaded == 0) {  in igmp_group_added()
1298 		im->loaded = 1;  in igmp_group_added()
1299 		ip_mc_filter_add(in_dev, im->multiaddr);  in igmp_group_added()
1303 	if (im->multiaddr == IGMP_ALL_HOSTS)  in igmp_group_added()
1305 	if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)  in igmp_group_added()
1311 	im->unsolicit_count = net->ipv4.sysctl_igmp_qrv;  in igmp_group_added()
1313 		spin_lock_bh(&im->lock);  in igmp_group_added()
1314 		igmp_start_timer(im, IGMP_INITIAL_REPORT_DELAY);  in igmp_group_added()
1315 		spin_unlock_bh(&im->lock);  in igmp_group_added()
1324 	if (im->sfmode == MCAST_EXCLUDE)  in igmp_group_added()
1325 		im->crcount = in_dev->mr_qrv ?: net->ipv4.sysctl_igmp_qrv;  in igmp_group_added()
1336 static u32 ip_mc_hash(const struct ip_mc_list *im)  in ip_mc_hash()  argument
1338 	return hash_32((__force u32)im->multiaddr, MC_HASH_SZ_LOG);  in ip_mc_hash()
1342 			   struct ip_mc_list *im)  in ip_mc_hash_add()  argument
1349 		hash = ip_mc_hash(im);  in ip_mc_hash_add()
1350 		im->next_hash = mc_hash[hash];  in ip_mc_hash_add()
1351 		rcu_assign_pointer(mc_hash[hash], im);  in ip_mc_hash_add()
1364 	for_each_pmc_rtnl(in_dev, im) {  in ip_mc_hash_add()
1365 		hash = ip_mc_hash(im);  in ip_mc_hash_add()
1366 		im->next_hash = mc_hash[hash];  in ip_mc_hash_add()
1367 		RCU_INIT_POINTER(mc_hash[hash], im);  in ip_mc_hash_add()
1374 			      struct ip_mc_list *im)  in ip_mc_hash_remove()  argument
1381 	mc_hash += ip_mc_hash(im);  in ip_mc_hash_remove()
1382 	while ((aux = rtnl_dereference(*mc_hash)) != im)  in ip_mc_hash_remove()
1384 	*mc_hash = im->next_hash;  in ip_mc_hash_remove()
1394 	struct ip_mc_list *im;  in __ip_mc_inc_group()  local
1398 	for_each_pmc_rtnl(in_dev, im) {  in __ip_mc_inc_group()
1399 		if (im->multiaddr == addr) {  in __ip_mc_inc_group()
1400 			im->users++;  in __ip_mc_inc_group()
1406 	im = kzalloc(sizeof(*im), GFP_KERNEL);  in __ip_mc_inc_group()
1407 	if (!im)  in __ip_mc_inc_group()
1410 	im->users = 1;  in __ip_mc_inc_group()
1411 	im->interface = in_dev;  in __ip_mc_inc_group()
1413 	im->multiaddr = addr;  in __ip_mc_inc_group()
1415 	im->sfmode = mode;  in __ip_mc_inc_group()
1416 	im->sfcount[mode] = 1;  in __ip_mc_inc_group()
1417 	refcount_set(&im->refcnt, 1);  in __ip_mc_inc_group()
1418 	spin_lock_init(&im->lock);  in __ip_mc_inc_group()
1420 	timer_setup(&im->timer, igmp_timer_expire, 0);  in __ip_mc_inc_group()
1423 	im->next_rcu = in_dev->mc_list;  in __ip_mc_inc_group()
1425 	rcu_assign_pointer(in_dev->mc_list, im);  in __ip_mc_inc_group()
1427 	ip_mc_hash_add(in_dev, im);  in __ip_mc_inc_group()
1430 	igmpv3_del_delrec(in_dev, im);  in __ip_mc_inc_group()
1432 	igmp_group_added(im);  in __ip_mc_inc_group()
1616 	struct ip_mc_list *im;  in ip_mc_rejoin_groups()  local
1622 	for_each_pmc_rtnl(in_dev, im) {  in ip_mc_rejoin_groups()
1623 		if (im->multiaddr == IGMP_ALL_HOSTS)  in ip_mc_rejoin_groups()
1625 		if (ipv4_is_local_multicast(im->multiaddr) &&  in ip_mc_rejoin_groups()
1638 		igmp_send_report(in_dev, im, type);  in ip_mc_rejoin_groups()
2685 	struct ip_mc_list *im;  in ip_check_mc_rcu()  local
2694 		for (im = rcu_dereference(mc_hash[hash]);  in ip_check_mc_rcu()
2695 		     im != NULL;  in ip_check_mc_rcu()
2696 		     im = rcu_dereference(im->next_hash)) {  in ip_check_mc_rcu()
2697 			if (im->multiaddr == mc_addr)  in ip_check_mc_rcu()
2701 		for_each_pmc_rcu(in_dev, im) {  in ip_check_mc_rcu()
2702 			if (im->multiaddr == mc_addr)  in ip_check_mc_rcu()
2706 	if (im && proto == IPPROTO_IGMP) {  in ip_check_mc_rcu()
2708 	} else if (im) {  in ip_check_mc_rcu()
2710 			for (psf = im->sources; psf; psf = psf->sf_next) {  in ip_check_mc_rcu()
2717 					im->sfcount[MCAST_EXCLUDE];  in ip_check_mc_rcu()
2719 				rv = im->sfcount[MCAST_EXCLUDE] != 0;  in ip_check_mc_rcu()
2738 	struct ip_mc_list *im = NULL;  in igmp_mc_get_first()  local
2748 		im = rcu_dereference(in_dev->mc_list);  in igmp_mc_get_first()
2749 		if (im) {  in igmp_mc_get_first()
2754 	return im;  in igmp_mc_get_first()
2757 static struct ip_mc_list *igmp_mc_get_next(struct seq_file *seq, struct ip_mc_list *im)  in igmp_mc_get_next()  argument
2761 	im = rcu_dereference(im->next_rcu);  in igmp_mc_get_next()
2762 	while (!im) {  in igmp_mc_get_next()
2771 		im = rcu_dereference(state->in_dev->mc_list);  in igmp_mc_get_next()
2773 	return im;  in igmp_mc_get_next()
2778 	struct ip_mc_list *im = igmp_mc_get_first(seq);  in igmp_mc_get_idx()  local
2779 	if (im)  in igmp_mc_get_idx()
2780 		while (pos && (im = igmp_mc_get_next(seq, im)) != NULL)  in igmp_mc_get_idx()
2782 	return pos ? NULL : im;  in igmp_mc_get_idx()
2794 	struct ip_mc_list *im;  in igmp_mc_seq_next()  local
2796 		im = igmp_mc_get_first(seq);  in igmp_mc_seq_next()
2798 		im = igmp_mc_get_next(seq, v);  in igmp_mc_seq_next()
2800 	return im;  in igmp_mc_seq_next()
2819 		struct ip_mc_list *im = (struct ip_mc_list *)v;  in igmp_mc_seq_show()  local
2832 		if (rcu_access_pointer(state->in_dev->mc_list) == im) {  in igmp_mc_seq_show()
2837 		delta = im->timer.expires - jiffies;  in igmp_mc_seq_show()
2840 			   im->multiaddr, im->users,  in igmp_mc_seq_show()
2841 			   im->tm_running,  in igmp_mc_seq_show()
2842 			   im->tm_running ? jiffies_delta_to_clock_t(delta) : 0,  in igmp_mc_seq_show()
2843 			   im->reporter);  in igmp_mc_seq_show()
2859 	struct ip_mc_list *im;  member
2868 	struct ip_mc_list *im = NULL;  in igmp_mcf_get_first()  local
2872 	state->im = NULL;  in igmp_mcf_get_first()
2878 		im = rcu_dereference(idev->mc_list);  in igmp_mcf_get_first()
2879 		if (likely(im)) {  in igmp_mcf_get_first()
2880 			spin_lock_bh(&im->lock);  in igmp_mcf_get_first()
2881 			psf = im->sources;  in igmp_mcf_get_first()
2883 				state->im = im;  in igmp_mcf_get_first()
2887 			spin_unlock_bh(&im->lock);  in igmp_mcf_get_first()
2899 		spin_unlock_bh(&state->im->lock);  in igmp_mcf_get_next()
2900 		state->im = state->im->next;  in igmp_mcf_get_next()
2901 		while (!state->im) {  in igmp_mcf_get_next()
2910 			state->im = rcu_dereference(state->idev->mc_list);  in igmp_mcf_get_next()
2912 		if (!state->im)  in igmp_mcf_get_next()
2914 		spin_lock_bh(&state->im->lock);  in igmp_mcf_get_next()
2915 		psf = state->im->sources;  in igmp_mcf_get_next()
2952 	if (likely(state->im)) {  in igmp_mcf_seq_stop()
2953 		spin_unlock_bh(&state->im->lock);  in igmp_mcf_seq_stop()
2954 		state->im = NULL;  in igmp_mcf_seq_stop()
2973 			   ntohl(state->im->multiaddr),  in igmp_mcf_seq_show()