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()
213 /* It must be called with locked im->lock */
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 (refcount_inc_not_zero(&im->refcnt)) {  in igmp_start_timer()
220 		if (mod_timer(&im->timer, jiffies + tv + 2))  in igmp_start_timer()
221 			ip_ma_put(im);  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()
840 	struct ip_mc_list *im = from_timer(im, t, timer);  in igmp_timer_expire()  local
841 	struct in_device *in_dev = im->interface;  in igmp_timer_expire()
843 	spin_lock(&im->lock);  in igmp_timer_expire()
844 	im->tm_running = 0;  in igmp_timer_expire()
846 	if (im->unsolicit_count && --im->unsolicit_count)  in igmp_timer_expire()
847 		igmp_start_timer(im, unsolicited_report_interval(in_dev));  in igmp_timer_expire()
849 	im->reporter = 1;  in igmp_timer_expire()
850 	spin_unlock(&im->lock);  in igmp_timer_expire()
853 		igmp_send_report(in_dev, im, IGMP_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
855 		igmp_send_report(in_dev, im, IGMPV2_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
857 		igmp_send_report(in_dev, im, IGMPV3_HOST_MEMBERSHIP_REPORT);  in igmp_timer_expire()
859 	ip_ma_put(im);  in igmp_timer_expire()
921 	struct ip_mc_list *im;  in igmp_heard_report()  local
933 	for_each_pmc_rcu(in_dev, im) {  in igmp_heard_report()
934 		if (im->multiaddr == group) {  in igmp_heard_report()
935 			igmp_stop_timer(im);  in igmp_heard_report()
949 	struct ip_mc_list	*im;  in igmp_heard_query()  local
1046 	for_each_pmc_rcu(in_dev, im) {  in igmp_heard_query()
1049 		if (group && group != im->multiaddr)  in igmp_heard_query()
1051 		if (im->multiaddr == IGMP_ALL_HOSTS)  in igmp_heard_query()
1053 		if (ipv4_is_local_multicast(im->multiaddr) &&  in igmp_heard_query()
1056 		spin_lock_bh(&im->lock);  in igmp_heard_query()
1057 		if (im->tm_running)  in igmp_heard_query()
1058 			im->gsquery = im->gsquery && mark;  in igmp_heard_query()
1060 			im->gsquery = mark;  in igmp_heard_query()
1061 		changed = !im->gsquery ||  in igmp_heard_query()
1062 			igmp_marksources(im, ntohs(ih3->nsrcs), ih3->srcs);  in igmp_heard_query()
1063 		spin_unlock_bh(&im->lock);  in igmp_heard_query()
1065 			igmp_mod_timer(im, max_delay);  in igmp_heard_query()
1175 static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im,  in igmpv3_add_delrec()  argument
1191 	spin_lock_bh(&im->lock);  in igmpv3_add_delrec()
1192 	pmc->interface = im->interface;  in igmpv3_add_delrec()
1194 	pmc->multiaddr = im->multiaddr;  in igmpv3_add_delrec()
1196 	pmc->sfmode = im->sfmode;  in igmpv3_add_delrec()
1200 		pmc->tomb = im->tomb;  in igmpv3_add_delrec()
1201 		pmc->sources = im->sources;  in igmpv3_add_delrec()
1202 		im->tomb = im->sources = NULL;  in igmpv3_add_delrec()
1206 	spin_unlock_bh(&im->lock);  in igmpv3_add_delrec()
1217 static void igmpv3_del_delrec(struct in_device *in_dev, struct ip_mc_list *im)  in igmpv3_del_delrec()  argument
1222 	__be32 multiaddr = im->multiaddr;  in igmpv3_del_delrec()
1239 	spin_lock_bh(&im->lock);  in igmpv3_del_delrec()
1241 		im->interface = pmc->interface;  in igmpv3_del_delrec()
1242 		if (im->sfmode == MCAST_INCLUDE) {  in igmpv3_del_delrec()
1243 			swap(im->tomb, pmc->tomb);  in igmpv3_del_delrec()
1244 			swap(im->sources, pmc->sources);  in igmpv3_del_delrec()
1245 			for (psf = im->sources; psf; psf = psf->sf_next)  in igmpv3_del_delrec()
1249 			im->crcount = in_dev->mr_qrv ?:  in igmpv3_del_delrec()
1255 	spin_unlock_bh(&im->lock);  in igmpv3_del_delrec()
1291 static void __igmp_group_dropped(struct ip_mc_list *im, gfp_t gfp)  in __igmp_group_dropped()  argument
1293 	struct in_device *in_dev = im->interface;  in __igmp_group_dropped()
1299 	if (im->loaded) {  in __igmp_group_dropped()
1300 		im->loaded = 0;  in __igmp_group_dropped()
1301 		ip_mc_filter_del(in_dev, im->multiaddr);  in __igmp_group_dropped()
1305 	if (im->multiaddr == IGMP_ALL_HOSTS)  in __igmp_group_dropped()
1307 	if (ipv4_is_local_multicast(im->multiaddr) &&  in __igmp_group_dropped()
1311 	reporter = im->reporter;  in __igmp_group_dropped()
1312 	igmp_stop_timer(im);  in __igmp_group_dropped()
1319 				igmp_send_report(in_dev, im, IGMP_HOST_LEAVE_MESSAGE);  in __igmp_group_dropped()
1323 		igmpv3_add_delrec(in_dev, im, gfp);  in __igmp_group_dropped()
1330 static void igmp_group_dropped(struct ip_mc_list *im)  in igmp_group_dropped()  argument
1332 	__igmp_group_dropped(im, GFP_KERNEL);  in igmp_group_dropped()
1335 static void igmp_group_added(struct ip_mc_list *im)  in igmp_group_added()  argument
1337 	struct in_device *in_dev = im->interface;  in igmp_group_added()
1342 	if (im->loaded == 0) {  in igmp_group_added()
1343 		im->loaded = 1;  in igmp_group_added()
1344 		ip_mc_filter_add(in_dev, im->multiaddr);  in igmp_group_added()
1348 	if (im->multiaddr == IGMP_ALL_HOSTS)  in igmp_group_added()
1350 	if (ipv4_is_local_multicast(im->multiaddr) &&  in igmp_group_added()
1357 	im->unsolicit_count = READ_ONCE(net->ipv4.sysctl_igmp_qrv);  in igmp_group_added()
1359 		spin_lock_bh(&im->lock);  in igmp_group_added()
1360 		igmp_start_timer(im, IGMP_INITIAL_REPORT_DELAY);  in igmp_group_added()
1361 		spin_unlock_bh(&im->lock);  in igmp_group_added()
1370 	if (im->sfmode == MCAST_EXCLUDE)  in igmp_group_added()
1371 		im->crcount = in_dev->mr_qrv ?: READ_ONCE(net->ipv4.sysctl_igmp_qrv);  in igmp_group_added()
1382 static u32 ip_mc_hash(const struct ip_mc_list *im)  in ip_mc_hash()  argument
1384 	return hash_32((__force u32)im->multiaddr, MC_HASH_SZ_LOG);  in ip_mc_hash()
1388 			   struct ip_mc_list *im)  in ip_mc_hash_add()  argument
1395 		hash = ip_mc_hash(im);  in ip_mc_hash_add()
1396 		im->next_hash = mc_hash[hash];  in ip_mc_hash_add()
1397 		rcu_assign_pointer(mc_hash[hash], im);  in ip_mc_hash_add()
1410 	for_each_pmc_rtnl(in_dev, im) {  in ip_mc_hash_add()
1411 		hash = ip_mc_hash(im);  in ip_mc_hash_add()
1412 		im->next_hash = mc_hash[hash];  in ip_mc_hash_add()
1413 		RCU_INIT_POINTER(mc_hash[hash], im);  in ip_mc_hash_add()
1420 			      struct ip_mc_list *im)  in ip_mc_hash_remove()  argument
1427 	mc_hash += ip_mc_hash(im);  in ip_mc_hash_remove()
1428 	while ((aux = rtnl_dereference(*mc_hash)) != im)  in ip_mc_hash_remove()
1430 	*mc_hash = im->next_hash;  in ip_mc_hash_remove()
1440 	struct ip_mc_list *im;  in ____ip_mc_inc_group()  local
1444 	for_each_pmc_rtnl(in_dev, im) {  in ____ip_mc_inc_group()
1445 		if (im->multiaddr == addr) {  in ____ip_mc_inc_group()
1446 			im->users++;  in ____ip_mc_inc_group()
1452 	im = kzalloc(sizeof(*im), gfp);  in ____ip_mc_inc_group()
1453 	if (!im)  in ____ip_mc_inc_group()
1456 	im->users = 1;  in ____ip_mc_inc_group()
1457 	im->interface = in_dev;  in ____ip_mc_inc_group()
1459 	im->multiaddr = addr;  in ____ip_mc_inc_group()
1461 	im->sfmode = mode;  in ____ip_mc_inc_group()
1462 	im->sfcount[mode] = 1;  in ____ip_mc_inc_group()
1463 	refcount_set(&im->refcnt, 1);  in ____ip_mc_inc_group()
1464 	spin_lock_init(&im->lock);  in ____ip_mc_inc_group()
1466 	timer_setup(&im->timer, igmp_timer_expire, 0);  in ____ip_mc_inc_group()
1469 	im->next_rcu = in_dev->mc_list;  in ____ip_mc_inc_group()
1471 	rcu_assign_pointer(in_dev->mc_list, im);  in ____ip_mc_inc_group()
1473 	ip_mc_hash_add(in_dev, im);  in ____ip_mc_inc_group()
1476 	igmpv3_del_delrec(in_dev, im);  in ____ip_mc_inc_group()
1478 	igmp_group_added(im);  in ____ip_mc_inc_group()
1645 	struct ip_mc_list *im;  in ip_mc_rejoin_groups()  local
1651 	for_each_pmc_rtnl(in_dev, im) {  in ip_mc_rejoin_groups()
1652 		if (im->multiaddr == IGMP_ALL_HOSTS)  in ip_mc_rejoin_groups()
1654 		if (ipv4_is_local_multicast(im->multiaddr) &&  in ip_mc_rejoin_groups()
1667 		igmp_send_report(in_dev, im, type);  in ip_mc_rejoin_groups()
2720 	struct ip_mc_list *im;  in ip_check_mc_rcu()  local
2729 		for (im = rcu_dereference(mc_hash[hash]);  in ip_check_mc_rcu()
2730 		     im != NULL;  in ip_check_mc_rcu()
2731 		     im = rcu_dereference(im->next_hash)) {  in ip_check_mc_rcu()
2732 			if (im->multiaddr == mc_addr)  in ip_check_mc_rcu()
2736 		for_each_pmc_rcu(in_dev, im) {  in ip_check_mc_rcu()
2737 			if (im->multiaddr == mc_addr)  in ip_check_mc_rcu()
2741 	if (im && proto == IPPROTO_IGMP) {  in ip_check_mc_rcu()
2743 	} else if (im) {  in ip_check_mc_rcu()
2745 			spin_lock_bh(&im->lock);  in ip_check_mc_rcu()
2746 			for (psf = im->sources; psf; psf = psf->sf_next) {  in ip_check_mc_rcu()
2753 					im->sfcount[MCAST_EXCLUDE];  in ip_check_mc_rcu()
2755 				rv = im->sfcount[MCAST_EXCLUDE] != 0;  in ip_check_mc_rcu()
2756 			spin_unlock_bh(&im->lock);  in ip_check_mc_rcu()
2775 	struct ip_mc_list *im = NULL;  in igmp_mc_get_first()  local
2785 		im = rcu_dereference(in_dev->mc_list);  in igmp_mc_get_first()
2786 		if (im) {  in igmp_mc_get_first()
2791 	return im;  in igmp_mc_get_first()
2794 static struct ip_mc_list *igmp_mc_get_next(struct seq_file *seq, struct ip_mc_list *im)  in igmp_mc_get_next()  argument
2798 	im = rcu_dereference(im->next_rcu);  in igmp_mc_get_next()
2799 	while (!im) {  in igmp_mc_get_next()
2808 		im = rcu_dereference(state->in_dev->mc_list);  in igmp_mc_get_next()
2810 	return im;  in igmp_mc_get_next()
2815 	struct ip_mc_list *im = igmp_mc_get_first(seq);  in igmp_mc_get_idx()  local
2816 	if (im)  in igmp_mc_get_idx()
2817 		while (pos && (im = igmp_mc_get_next(seq, im)) != NULL)  in igmp_mc_get_idx()
2819 	return pos ? NULL : im;  in igmp_mc_get_idx()
2831 	struct ip_mc_list *im;  in igmp_mc_seq_next()  local
2833 		im = igmp_mc_get_first(seq);  in igmp_mc_seq_next()
2835 		im = igmp_mc_get_next(seq, v);  in igmp_mc_seq_next()
2837 	return im;  in igmp_mc_seq_next()
2856 		struct ip_mc_list *im = v;  in igmp_mc_seq_show()  local
2869 		if (rcu_access_pointer(state->in_dev->mc_list) == im) {  in igmp_mc_seq_show()
2874 		delta = im->timer.expires - jiffies;  in igmp_mc_seq_show()
2877 			   im->multiaddr, im->users,  in igmp_mc_seq_show()
2878 			   im->tm_running,  in igmp_mc_seq_show()
2879 			   im->tm_running ? jiffies_delta_to_clock_t(delta) : 0,  in igmp_mc_seq_show()
2880 			   im->reporter);  in igmp_mc_seq_show()
2896 	struct ip_mc_list *im;  member
2905 	struct ip_mc_list *im = NULL;  in igmp_mcf_get_first()  local
2909 	state->im = NULL;  in igmp_mcf_get_first()
2915 		im = rcu_dereference(idev->mc_list);  in igmp_mcf_get_first()
2916 		if (likely(im)) {  in igmp_mcf_get_first()
2917 			spin_lock_bh(&im->lock);  in igmp_mcf_get_first()
2918 			psf = im->sources;  in igmp_mcf_get_first()
2920 				state->im = im;  in igmp_mcf_get_first()
2924 			spin_unlock_bh(&im->lock);  in igmp_mcf_get_first()
2936 		spin_unlock_bh(&state->im->lock);  in igmp_mcf_get_next()
2937 		state->im = state->im->next;  in igmp_mcf_get_next()
2938 		while (!state->im) {  in igmp_mcf_get_next()
2947 			state->im = rcu_dereference(state->idev->mc_list);  in igmp_mcf_get_next()
2949 		if (!state->im)  in igmp_mcf_get_next()
2951 		spin_lock_bh(&state->im->lock);  in igmp_mcf_get_next()
2952 		psf = state->im->sources;  in igmp_mcf_get_next()
2989 	if (likely(state->im)) {  in igmp_mcf_seq_stop()
2990 		spin_unlock_bh(&state->im->lock);  in igmp_mcf_seq_stop()
2991 		state->im = NULL;  in igmp_mcf_seq_stop()
3010 			   ntohl(state->im->multiaddr),  in igmp_mcf_seq_show()