1 files changed, 248 insertions, 215 deletions

diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index 359b2bc888cf..d1180370fdf4 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -3,6 +3,7 @@
  *
  * Copyright (c) 2000-2006, 2014-2018, Ericsson AB
  * Copyright (c) 2004-2008, 2010-2014, Wind River Systems
+ * Copyright (c) 2020-2021, Red Hat Inc
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -103,7 +104,8 @@ RB_DECLARE_CALLBACKS_MAX(static, sr_callbacks,
  *                               range match
  * @sr: the service range pointer as a loop cursor
  * @sc: the pointer to tipc service which holds the service range rbtree
- * @start, end: the range (end >= start) for matching
+ * @start: beginning of the search range (end >= start) for matching
+ * @end: end of the search range (end >= start) for matching
  */
 #define service_range_foreach_match(sr, sc, start, end)			\
 	for (sr = service_range_match_first((sc)->ranges.rb_node,	\
@@ -117,7 +119,8 @@ RB_DECLARE_CALLBACKS_MAX(static, sr_callbacks,
 /**
  * service_range_match_first - find first service range matching a range
  * @n: the root node of service range rbtree for searching
- * @start, end: the range (end >= start) for matching
+ * @start: beginning of the search range (end >= start) for matching
+ * @end: end of the search range (end >= start) for matching
  *
  * Return: the leftmost service range node in the rbtree that overlaps the
  * specific range if any. Otherwise, returns NULL.
@@ -166,7 +169,8 @@ static struct service_range *service_range_match_first(struct rb_node *n,
 /**
  * service_range_match_next - find next service range matching a range
  * @n: a node in service range rbtree from which the searching starts
- * @start, end: the range (end >= start) for matching
+ * @start: beginning of the search range (end >= start) for matching
+ * @end: end of the search range (end >= start) for matching
  *
  * Return: the next service range node to the given node in the rbtree that
  * overlaps the specific range if any. Otherwise, returns NULL.
@@ -218,50 +222,57 @@ static int hash(int x)
 
 /**
  * tipc_publ_create - create a publication structure
+ * @ua: the service range the user is binding to
+ * @sk: the address of the socket that is bound
+ * @key: publication key
  */
-static struct publication *tipc_publ_create(u32 type, u32 lower, u32 upper,
-					    u32 scope, u32 node, u32 port,
+static struct publication *tipc_publ_create(struct tipc_uaddr *ua,
+					    struct tipc_socket_addr *sk,
 					    u32 key)
 {
-	struct publication *publ = kzalloc(sizeof(*publ), GFP_ATOMIC);
+	struct publication *p = kzalloc(sizeof(*p), GFP_ATOMIC);
 
-	if (!publ)
+	if (!p)
 		return NULL;
 
-	publ->type = type;
-	publ->lower = lower;
-	publ->upper = upper;
-	publ->scope = scope;
-	publ->node = node;
-	publ->port = port;
-	publ->key = key;
-	INIT_LIST_HEAD(&publ->binding_sock);
-	INIT_LIST_HEAD(&publ->binding_node);
-	INIT_LIST_HEAD(&publ->local_publ);
-	INIT_LIST_HEAD(&publ->all_publ);
-	INIT_LIST_HEAD(&publ->list);
-	return publ;
+	p->sr = ua->sr;
+	p->sk = *sk;
+	p->scope = ua->scope;
+	p->key = key;
+	INIT_LIST_HEAD(&p->binding_sock);
+	INIT_LIST_HEAD(&p->binding_node);
+	INIT_LIST_HEAD(&p->local_publ);
+	INIT_LIST_HEAD(&p->all_publ);
+	INIT_LIST_HEAD(&p->list);
+	return p;
 }
 
 /**
  * tipc_service_create - create a service structure for the specified 'type'
+ * @net: network namespace
+ * @ua: address representing the service to be bound
  *
  * Allocates a single range structure and sets it to all 0's.
  */
-static struct tipc_service *tipc_service_create(u32 type, struct hlist_head *hd)
+static struct tipc_service *tipc_service_create(struct net *net,
+						struct tipc_uaddr *ua)
 {
-	struct tipc_service *service = kzalloc(sizeof(*service), GFP_ATOMIC);
+	struct name_table *nt = tipc_name_table(net);
+	struct tipc_service *service;
+	struct hlist_head *hd;
 
+	service = kzalloc(sizeof(*service), GFP_ATOMIC);
 	if (!service) {
 		pr_warn("Service creation failed, no memory\n");
 		return NULL;
 	}
 
 	spin_lock_init(&service->lock);
-	service->type = type;
+	service->type = ua->sr.type;
 	service->ranges = RB_ROOT;
 	INIT_HLIST_NODE(&service->service_list);
 	INIT_LIST_HEAD(&service->subscriptions);
+	hd = &nt->services[hash(ua->sr.type)];
 	hlist_add_head_rcu(&service->service_list, hd);
 	return service;
 }
@@ -269,13 +280,13 @@ static struct tipc_service *tipc_service_create(u32 type, struct hlist_head *hd)
 /*  tipc_service_find_range - find service range matching publication parameters
  */
 static struct service_range *tipc_service_find_range(struct tipc_service *sc,
-						     u32 lower, u32 upper)
+						     struct tipc_uaddr *ua)
 {
 	struct service_range *sr;
 
-	service_range_foreach_match(sr, sc, lower, upper) {
+	service_range_foreach_match(sr, sc, ua->sr.lower, ua->sr.upper) {
 		/* Look for exact match */
-		if (sr->lower == lower && sr->upper == upper)
+		if (sr->lower == ua->sr.lower && sr->upper == ua->sr.upper)
 			return sr;
 	}
 
@@ -283,10 +294,12 @@ static struct service_range *tipc_service_find_range(struct tipc_service *sc,
 }
 
 static struct service_range *tipc_service_create_range(struct tipc_service *sc,
-						       u32 lower, u32 upper)
+						       struct publication *p)
 {
 	struct rb_node **n, *parent = NULL;
 	struct service_range *sr;
+	u32 lower = p->sr.lower;
+	u32 upper = p->sr.upper;
 
 	n = &sc->ranges.rb_node;
 	while (*n) {
@@ -314,61 +327,68 @@ static struct service_range *tipc_service_create_range(struct tipc_service *sc,
 	return sr;
 }
 
-static struct publication *tipc_service_insert_publ(struct net *net,
-						    struct tipc_service *sc,
-						    u32 type, u32 lower,
-						    u32 upper, u32 scope,
-						    u32 node, u32 port,
-						    u32 key)
+static bool tipc_service_insert_publ(struct net *net,
+				     struct tipc_service *sc,
+				     struct publication *p)
 {
 	struct tipc_subscription *sub, *tmp;
 	struct service_range *sr;
-	struct publication *p;
+	struct publication *_p;
+	u32 node = p->sk.node;
 	bool first = false;
+	bool res = false;
+	u32 key = p->key;
 
-	sr = tipc_service_create_range(sc, lower, upper);
+	spin_lock_bh(&sc->lock);
+	sr = tipc_service_create_range(sc, p);
 	if (!sr)
-		goto  err;
+		goto  exit;
 
 	first = list_empty(&sr->all_publ);
 
 	/* Return if the publication already exists */
-	list_for_each_entry(p, &sr->all_publ, all_publ) {
-		if (p->key == key && (!p->node || p->node == node))
-			return NULL;
+	list_for_each_entry(_p, &sr->all_publ, all_publ) {
+		if (_p->key == key && (!_p->sk.node || _p->sk.node == node)) {
+			pr_debug("Failed to bind duplicate %u,%u,%u/%u:%u/%u\n",
+				 p->sr.type, p->sr.lower, p->sr.upper,
+				 node, p->sk.ref, key);
+			goto exit;
+		}
 	}
 
-	/* Create and insert publication */
-	p = tipc_publ_create(type, lower, upper, scope, node, port, key);
-	if (!p)
-		goto err;
-	/* Suppose there shouldn't be a huge gap btw publs i.e. >INT_MAX */
-	p->id = sc->publ_cnt++;
-	if (in_own_node(net, node))
+	if (in_own_node(net, p->sk.node))
 		list_add(&p->local_publ, &sr->local_publ);
 	list_add(&p->all_publ, &sr->all_publ);
+	p->id = sc->publ_cnt++;
 
 	/* Any subscriptions waiting for notification?  */
 	list_for_each_entry_safe(sub, tmp, &sc->subscriptions, service_list) {
-		tipc_sub_report_overlap(sub, p->lower, p->upper, TIPC_PUBLISHED,
-					p->port, p->node, p->scope, first);
+		tipc_sub_report_overlap(sub, p, TIPC_PUBLISHED, first);
 	}
-	return p;
-err:
-	pr_warn("Failed to bind to %u,%u,%u, no memory\n", type, lower, upper);
-	return NULL;
+	res = true;
+exit:
+	if (!res)
+		pr_warn("Failed to bind to %u,%u,%u\n",
+			p->sr.type, p->sr.lower, p->sr.upper);
+	spin_unlock_bh(&sc->lock);
+	return res;
 }
 
 /**
  * tipc_service_remove_publ - remove a publication from a service
+ * @r: service_range to remove publication from
+ * @sk: address publishing socket
+ * @key: target publication key
  */
-static struct publication *tipc_service_remove_publ(struct service_range *sr,
-						    u32 node, u32 key)
+static struct publication *tipc_service_remove_publ(struct service_range *r,
+						    struct tipc_socket_addr *sk,
+						    u32 key)
 {
 	struct publication *p;
+	u32 node = sk->node;
 
-	list_for_each_entry(p, &sr->all_publ, all_publ) {
-		if (p->key != key || (node && node != p->node))
+	list_for_each_entry(p, &r->all_publ, all_publ) {
+		if (p->key != key || (node && node != p->sk.node))
 			continue;
 		list_del(&p->all_publ);
 		list_del(&p->local_publ);
@@ -377,12 +397,12 @@ static struct publication *tipc_service_remove_publ(struct service_range *sr,
 	return NULL;
 }
 
-/**
+/*
  * Code reused: time_after32() for the same purpose
  */
 #define publication_after(pa, pb) time_after32((pa)->id, (pb)->id)
-static int tipc_publ_sort(void *priv, struct list_head *a,
-			  struct list_head *b)
+static int tipc_publ_sort(void *priv, const struct list_head *a,
+			  const struct list_head *b)
 {
 	struct publication *pa, *pb;
 
@@ -395,21 +415,20 @@ static int tipc_publ_sort(void *priv, struct list_head *a,
  * tipc_service_subscribe - attach a subscription, and optionally
  * issue the prescribed number of events if there is any service
  * range overlapping with the requested range
+ * @service: the tipc_service to attach the @sub to
+ * @sub: the subscription to attach
  */
 static void tipc_service_subscribe(struct tipc_service *service,
 				   struct tipc_subscription *sub)
 {
-	struct tipc_subscr *sb = &sub->evt.s;
 	struct publication *p, *first, *tmp;
 	struct list_head publ_list;
 	struct service_range *sr;
-	struct tipc_name_seq ns;
-	u32 filter;
+	u32 filter, lower, upper;
 
-	ns.type = tipc_sub_read(sb, seq.type);
-	ns.lower = tipc_sub_read(sb, seq.lower);
-	ns.upper = tipc_sub_read(sb, seq.upper);
-	filter = tipc_sub_read(sb, filter);
+	filter = sub->s.filter;
+	lower = sub->s.seq.lower;
+	upper = sub->s.seq.upper;
 
 	tipc_sub_get(sub);
 	list_add(&sub->service_list, &service->subscriptions);
@@ -418,7 +437,7 @@ static void tipc_service_subscribe(struct tipc_service *service,
 		return;
 
 	INIT_LIST_HEAD(&publ_list);
-	service_range_foreach_match(sr, service, ns.lower, ns.upper) {
+	service_range_foreach_match(sr, service, lower, upper) {
 		first = NULL;
 		list_for_each_entry(p, &sr->all_publ, all_publ) {
 			if (filter & TIPC_SUB_PORTS)
@@ -434,80 +453,74 @@ static void tipc_service_subscribe(struct tipc_service *service,
 	/* Sort the publications before reporting */
 	list_sort(NULL, &publ_list, tipc_publ_sort);
 	list_for_each_entry_safe(p, tmp, &publ_list, list) {
-		tipc_sub_report_overlap(sub, p->lower, p->upper,
-					TIPC_PUBLISHED, p->port, p->node,
-					p->scope, true);
+		tipc_sub_report_overlap(sub, p, TIPC_PUBLISHED, true);
 		list_del_init(&p->list);
 	}
 }
 
-static struct tipc_service *tipc_service_find(struct net *net, u32 type)
+static struct tipc_service *tipc_service_find(struct net *net,
+					      struct tipc_uaddr *ua)
 {
 	struct name_table *nt = tipc_name_table(net);
 	struct hlist_head *service_head;
 	struct tipc_service *service;
 
-	service_head = &nt->services[hash(type)];
+	service_head = &nt->services[hash(ua->sr.type)];
 	hlist_for_each_entry_rcu(service, service_head, service_list) {
-		if (service->type == type)
+		if (service->type == ua->sr.type)
 			return service;
 	}
 	return NULL;
 };
 
-struct publication *tipc_nametbl_insert_publ(struct net *net, u32 type,
-					     u32 lower, u32 upper,
-					     u32 scope, u32 node,
-					     u32 port, u32 key)
+struct publication *tipc_nametbl_insert_publ(struct net *net,
+					     struct tipc_uaddr *ua,
+					     struct tipc_socket_addr *sk,
+					     u32 key)
 {
-	struct name_table *nt = tipc_name_table(net);
 	struct tipc_service *sc;
 	struct publication *p;
 
-	if (scope > TIPC_NODE_SCOPE || lower > upper) {
-		pr_debug("Failed to bind illegal {%u,%u,%u} with scope %u\n",
-			 type, lower, upper, scope);
-		return NULL;
-	}
-	sc = tipc_service_find(net, type);
-	if (!sc)
-		sc = tipc_service_create(type, &nt->services[hash(type)]);
-	if (!sc)
+	p = tipc_publ_create(ua, sk, key);
+	if (!p)
 		return NULL;
 
-	spin_lock_bh(&sc->lock);
-	p = tipc_service_insert_publ(net, sc, type, lower, upper,
-				     scope, node, port, key);
-	spin_unlock_bh(&sc->lock);
-	return p;
+	sc = tipc_service_find(net, ua);
+	if (!sc)
+		sc = tipc_service_create(net, ua);
+	if (sc && tipc_service_insert_publ(net, sc, p))
+		return p;
+	kfree(p);
+	return NULL;
 }
 
-struct publication *tipc_nametbl_remove_publ(struct net *net, u32 type,
-					     u32 lower, u32 upper,
-					     u32 node, u32 key)
+struct publication *tipc_nametbl_remove_publ(struct net *net,
+					     struct tipc_uaddr *ua,
+					     struct tipc_socket_addr *sk,
+					     u32 key)
 {
-	struct tipc_service *sc = tipc_service_find(net, type);
 	struct tipc_subscription *sub, *tmp;
-	struct service_range *sr = NULL;
 	struct publication *p = NULL;
+	struct service_range *sr;
+	struct tipc_service *sc;
 	bool last;
 
+	sc = tipc_service_find(net, ua);
 	if (!sc)
-		return NULL;
+		goto exit;
 
 	spin_lock_bh(&sc->lock);
-	sr = tipc_service_find_range(sc, lower, upper);
+	sr = tipc_service_find_range(sc, ua);
 	if (!sr)
-		goto exit;
-	p = tipc_service_remove_publ(sr, node, key);
+		goto unlock;
+	p = tipc_service_remove_publ(sr, sk, key);
 	if (!p)
-		goto exit;
+		goto unlock;
 
 	/* Notify any waiting subscriptions */
 	last = list_empty(&sr->all_publ);
 	list_for_each_entry_safe(sub, tmp, &sc->subscriptions, service_list) {
-		tipc_sub_report_overlap(sub, lower, upper, TIPC_WITHDRAWN,
-					p->port, node, p->scope, last);
+		tipc_sub_report_overlap(sub, p, TIPC_WITHDRAWN, last);
 	}
 
 	/* Remove service range item if this was its last publication */
@@ -516,75 +529,85 @@ struct publication *tipc_nametbl_remove_publ(struct net *net, u32 type,
 		kfree(sr);
 	}
 
-	/* Delete service item if this no more publications and subscriptions */
+	/* Delete service item if no more publications and subscriptions */
 	if (RB_EMPTY_ROOT(&sc->ranges) && list_empty(&sc->subscriptions)) {
 		hlist_del_init_rcu(&sc->service_list);
 		kfree_rcu(sc, rcu);
 	}
-exit:
+unlock:
 	spin_unlock_bh(&sc->lock);
+exit:
+	if (!p) {
+		pr_err("Failed to remove unknown binding: %u,%u,%u/%u:%u/%u\n",
+		       ua->sr.type, ua->sr.lower, ua->sr.upper,
+		       sk->node, sk->ref, key);
+	}
 	return p;
 }
 
 /**
- * tipc_nametbl_translate - perform service instance to socket translation
+ * tipc_nametbl_lookup_anycast - perform service instance to socket translation
+ * @net: network namespace
+ * @ua: service address to look up
+ * @sk: address to socket we want to find
  *
- * On entry, 'dnode' is the search domain used during translation.
+ * On entry, a non-zero 'sk->node' indicates the node where we want lookup to be
+ * performed, which may not be this one.
  *
  * On exit:
- * - if translation is deferred to another node, leave 'dnode' unchanged and
- *   return 0
- * - if translation is attempted and succeeds, set 'dnode' to the publishing
- *   node and return the published (non-zero) port number
- * - if translation is attempted and fails, set 'dnode' to 0 and return 0
+ *
+ * - If lookup is deferred to another node, leave 'sk->node' unchanged and
+ *   return 'true'.
+ * - If lookup is successful, set the 'sk->node' and 'sk->ref' (== portid) which
+ *   represent the bound socket and return 'true'.
+ * - If lookup fails, return 'false'
  *
  * Note that for legacy users (node configured with Z.C.N address format) the
- * 'closest-first' lookup algorithm must be maintained, i.e., if dnode is 0
+ * 'closest-first' lookup algorithm must be maintained, i.e., if sk.node is 0
  * we must look in the local binding list first
  */
-u32 tipc_nametbl_translate(struct net *net, u32 type, u32 instance, u32 *dnode)
+bool tipc_nametbl_lookup_anycast(struct net *net,
+				 struct tipc_uaddr *ua,
+				 struct tipc_socket_addr *sk)
 {
 	struct tipc_net *tn = tipc_net(net);
 	bool legacy = tn->legacy_addr_format;
 	u32 self = tipc_own_addr(net);
-	struct service_range *sr;
+	u32 inst = ua->sa.instance;
+	struct service_range *r;
 	struct tipc_service *sc;
-	struct list_head *list;
 	struct publication *p;
-	u32 port = 0;
-	u32 node = 0;
+	struct list_head *l;
+	bool res = false;
 
-	if (!tipc_in_scope(legacy, *dnode, self))
-		return 0;
+	if (!tipc_in_scope(legacy, sk->node, self))
+		return true;
 
 	rcu_read_lock();
-	sc = tipc_service_find(net, type);
+	sc = tipc_service_find(net, ua);
 	if (unlikely(!sc))
 		goto exit;
 
 	spin_lock_bh(&sc->lock);
-	service_range_foreach_match(sr, sc, instance, instance) {
+	service_range_foreach_match(r, sc, inst, inst) {
 		/* Select lookup algo: local, closest-first or round-robin */
-		if (*dnode == self) {
-			list = &sr->local_publ;
-			if (list_empty(list))
+		if (sk->node == self) {
+			l = &r->local_publ;
+			if (list_empty(l))
 				continue;
-			p = list_first_entry(list, struct publication,
-					     local_publ);
-			list_move_tail(&p->local_publ, &sr->local_publ);
-		} else if (legacy && !*dnode && !list_empty(&sr->local_publ)) {
-			list = &sr->local_publ;
-			p = list_first_entry(list, struct publication,
-					     local_publ);
-			list_move_tail(&p->local_publ, &sr->local_publ);
+			p = list_first_entry(l, struct publication, local_publ);
+			list_move_tail(&p->local_publ, &r->local_publ);
+		} else if (legacy && !sk->node && !list_empty(&r->local_publ)) {
+			l = &r->local_publ;
+			p = list_first_entry(l, struct publication, local_publ);
+			list_move_tail(&p->local_publ, &r->local_publ);
 		} else {
-			list = &sr->all_publ;
-			p = list_first_entry(list, struct publication,
-					     all_publ);
-			list_move_tail(&p->all_publ, &sr->all_publ);
+			l = &r->all_publ;
+			p = list_first_entry(l, struct publication, all_publ);
+			list_move_tail(&p->all_publ, &r->all_publ);
 		}
-		port = p->port;
-		node = p->node;
+		*sk = p->sk;
+		res = true;
 		/* Todo: as for legacy, pick the first matching range only, a
 		 * "true" round-robin will be performed as needed.
 		 */
@@ -594,40 +617,45 @@ u32 tipc_nametbl_translate(struct net *net, u32 type, u32 instance, u32 *dnode)
 
 exit:
 	rcu_read_unlock();
-	*dnode = node;
-	return port;
+	return res;
 }
 
-bool tipc_nametbl_lookup(struct net *net, u32 type, u32 instance, u32 scope,
-			 struct list_head *dsts, int *dstcnt, u32 exclude,
-			 bool all)
+/* tipc_nametbl_lookup_group(): lookup destinaton(s) in a communication group
+ * Returns a list of one (== group anycast) or more (== group multicast)
+ * destination socket/node pairs matching the given address.
+ * The requester may or may not want to exclude himself from the list.
+ */
+bool tipc_nametbl_lookup_group(struct net *net, struct tipc_uaddr *ua,
+			       struct list_head *dsts, int *dstcnt,
+			       u32 exclude, bool mcast)
 {
 	u32 self = tipc_own_addr(net);
+	u32 inst = ua->sa.instance;
 	struct service_range *sr;
 	struct tipc_service *sc;
 	struct publication *p;
 
 	*dstcnt = 0;
 	rcu_read_lock();
-	sc = tipc_service_find(net, type);
+	sc = tipc_service_find(net, ua);
 	if (unlikely(!sc))
 		goto exit;
 
 	spin_lock_bh(&sc->lock);
 
 	/* Todo: a full search i.e. service_range_foreach_match() instead? */
-	sr = service_range_match_first(sc->ranges.rb_node, instance, instance);
+	sr = service_range_match_first(sc->ranges.rb_node, inst, inst);
 	if (!sr)
 		goto no_match;
 
 	list_for_each_entry(p, &sr->all_publ, all_publ) {
-		if (p->scope != scope)
+		if (p->scope != ua->scope)
 			continue;
-		if (p->port == exclude && p->node == self)
+		if (p->sk.ref == exclude && p->sk.node == self)
 			continue;
-		tipc_dest_push(dsts, p->node, p->port);
+		tipc_dest_push(dsts, p->sk.node, p->sk.ref);
 		(*dstcnt)++;
-		if (all)
+		if (mcast)
 			continue;
 		list_move_tail(&p->all_publ, &sr->all_publ);
 		break;
@@ -639,23 +667,29 @@ exit:
 	return !list_empty(dsts);
 }
 
-void tipc_nametbl_mc_lookup(struct net *net, u32 type, u32 lower, u32 upper,
-			    u32 scope, bool exact, struct list_head *dports)
+/* tipc_nametbl_lookup_mcast_sockets(): look up node local destinaton sockets
+ *                                      matching the given address
+ * Used on nodes which have received a multicast/broadcast message
+ * Returns a list of local sockets
+ */
+void tipc_nametbl_lookup_mcast_sockets(struct net *net, struct tipc_uaddr *ua,
+				       struct list_head *dports)
 {
 	struct service_range *sr;
 	struct tipc_service *sc;
 	struct publication *p;
+	u8 scope = ua->scope;
 
 	rcu_read_lock();
-	sc = tipc_service_find(net, type);
+	sc = tipc_service_find(net, ua);
 	if (!sc)
 		goto exit;
 
 	spin_lock_bh(&sc->lock);
-	service_range_foreach_match(sr, sc, lower, upper) {
+	service_range_foreach_match(sr, sc, ua->sr.lower, ua->sr.upper) {
 		list_for_each_entry(p, &sr->local_publ, local_publ) {
-			if (p->scope == scope || (!exact && p->scope < scope))
-				tipc_dest_push(dports, 0, p->port);
+			if (scope == p->scope || scope == TIPC_ANY_SCOPE)
+				tipc_dest_push(dports, 0, p->sk.ref);
 		}
 	}
 	spin_unlock_bh(&sc->lock);
@@ -663,26 +697,27 @@ exit:
 	rcu_read_unlock();
 }
 
-/* tipc_nametbl_lookup_dst_nodes - find broadcast destination nodes
- * - Creates list of nodes that overlap the given multicast address
- * - Determines if any node local destinations overlap
+/* tipc_nametbl_lookup_mcast_nodes(): look up all destination nodes matching
+ *                                    the given address. Used in sending node.
+ * Used on nodes which are sending out a multicast/broadcast message
+ * Returns a list of nodes, including own node if applicable
  */
-void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower,
-				   u32 upper, struct tipc_nlist *nodes)
+void tipc_nametbl_lookup_mcast_nodes(struct net *net, struct tipc_uaddr *ua,
+				     struct tipc_nlist *nodes)
 {
 	struct service_range *sr;
 	struct tipc_service *sc;
 	struct publication *p;
 
 	rcu_read_lock();
-	sc = tipc_service_find(net, type);
+	sc = tipc_service_find(net, ua);
 	if (!sc)
 		goto exit;
 
 	spin_lock_bh(&sc->lock);
-	service_range_foreach_match(sr, sc, lower, upper) {
+	service_range_foreach_match(sr, sc, ua->sr.lower, ua->sr.upper) {
 		list_for_each_entry(p, &sr->all_publ, all_publ) {
-			tipc_nlist_add(nodes, p->node);
+			tipc_nlist_add(nodes, p->sk.node);
 		}
 	}
 	spin_unlock_bh(&sc->lock);
@@ -693,7 +728,7 @@ exit:
 /* tipc_nametbl_build_group - build list of communication group members
  */
 void tipc_nametbl_build_group(struct net *net, struct tipc_group *grp,
-			      u32 type, u32 scope)
+			      struct tipc_uaddr *ua)
 {
 	struct service_range *sr;
 	struct tipc_service *sc;
@@ -701,7 +736,7 @@ void tipc_nametbl_build_group(struct net *net, struct tipc_group *grp,
 	struct rb_node *n;
 
 	rcu_read_lock();
-	sc = tipc_service_find(net, type);
+	sc = tipc_service_find(net, ua);
 	if (!sc)
 		goto exit;
 
@@ -709,9 +744,10 @@ void tipc_nametbl_build_group(struct net *net, struct tipc_group *grp,
 	for (n = rb_first(&sc->ranges); n; n = rb_next(n)) {
 		sr = container_of(n, struct service_range, tree_node);
 		list_for_each_entry(p, &sr->all_publ, all_publ) {
-			if (p->scope != scope)
+			if (p->scope != ua->scope)
 				continue;
-			tipc_group_add_member(grp, p->node, p->port, p->lower);
+			tipc_group_add_member(grp, p->sk.node, p->sk.ref,
+					      p->sr.lower);
 		}
 	}
 	spin_unlock_bh(&sc->lock);
@@ -721,14 +757,14 @@ exit:
 
 /* tipc_nametbl_publish - add service binding to name table
  */
-struct publication *tipc_nametbl_publish(struct net *net, u32 type, u32 lower,
-					 u32 upper, u32 scope, u32 port,
-					 u32 key)
+struct publication *tipc_nametbl_publish(struct net *net, struct tipc_uaddr *ua,
+					 struct tipc_socket_addr *sk, u32 key)
 {
 	struct name_table *nt = tipc_name_table(net);
 	struct tipc_net *tn = tipc_net(net);
 	struct publication *p = NULL;
 	struct sk_buff *skb = NULL;
+	u32 rc_dests;
 
 	spin_lock_bh(&tn->nametbl_lock);
 
@@ -737,77 +773,78 @@ struct publication *tipc_nametbl_publish(struct net *net, u32 type, u32 lower,
 		goto exit;
 	}
 
-	p = tipc_nametbl_insert_publ(net, type, lower, upper, scope,
-				     tipc_own_addr(net), port, key);
+	p = tipc_nametbl_insert_publ(net, ua, sk, key);
 	if (p) {
 		nt->local_publ_count++;
 		skb = tipc_named_publish(net, p);
 	}
+	rc_dests = nt->rc_dests;
 exit:
 	spin_unlock_bh(&tn->nametbl_lock);
 
 	if (skb)
-		tipc_node_broadcast(net, skb);
+		tipc_node_broadcast(net, skb, rc_dests);
 	return p;
+
 }
 
 /**
  * tipc_nametbl_withdraw - withdraw a service binding
+ * @net: network namespace
+ * @ua: service address/range being unbound
+ * @sk: address of the socket being unbound from
+ * @key: target publication key
  */
-int tipc_nametbl_withdraw(struct net *net, u32 type, u32 lower,
-			  u32 upper, u32 key)
+void tipc_nametbl_withdraw(struct net *net, struct tipc_uaddr *ua,
+			   struct tipc_socket_addr *sk, u32 key)
 {
 	struct name_table *nt = tipc_name_table(net);
 	struct tipc_net *tn = tipc_net(net);
-	u32 self = tipc_own_addr(net);
 	struct sk_buff *skb = NULL;
 	struct publication *p;
+	u32 rc_dests;
 
 	spin_lock_bh(&tn->nametbl_lock);
 
-	p = tipc_nametbl_remove_publ(net, type, lower, upper, self, key);
+	p = tipc_nametbl_remove_publ(net, ua, sk, key);
 	if (p) {
 		nt->local_publ_count--;
 		skb = tipc_named_withdraw(net, p);
 		list_del_init(&p->binding_sock);
 		kfree_rcu(p, rcu);
-	} else {
-		pr_err("Failed to remove local publication {%u,%u,%u}/%u\n",
-		       type, lower, upper, key);
 	}
+	rc_dests = nt->rc_dests;
 	spin_unlock_bh(&tn->nametbl_lock);
 
-	if (skb) {
-		tipc_node_broadcast(net, skb);
-		return 1;
-	}
-	return 0;
+	if (skb)
+		tipc_node_broadcast(net, skb, rc_dests);
 }
 
 /**
  * tipc_nametbl_subscribe - add a subscription object to the name table
+ * @sub: subscription to add
  */
 bool tipc_nametbl_subscribe(struct tipc_subscription *sub)
 {
-	struct name_table *nt = tipc_name_table(sub->net);
 	struct tipc_net *tn = tipc_net(sub->net);
-	struct tipc_subscr *s = &sub->evt.s;
-	u32 type = tipc_sub_read(s, seq.type);
+	u32 type = sub->s.seq.type;
 	struct tipc_service *sc;
+	struct tipc_uaddr ua;
 	bool res = true;
 
+	tipc_uaddr(&ua, TIPC_SERVICE_RANGE, TIPC_NODE_SCOPE, type,
+		   sub->s.seq.lower, sub->s.seq.upper);
 	spin_lock_bh(&tn->nametbl_lock);
-	sc = tipc_service_find(sub->net, type);
+	sc = tipc_service_find(sub->net, &ua);
 	if (!sc)
-		sc = tipc_service_create(type, &nt->services[hash(type)]);
+		sc = tipc_service_create(sub->net, &ua);
 	if (sc) {
 		spin_lock_bh(&sc->lock);
 		tipc_service_subscribe(sc, sub);
 		spin_unlock_bh(&sc->lock);
 	} else {
-		pr_warn("Failed to subscribe for {%u,%u,%u}\n", type,
-			tipc_sub_read(s, seq.lower),
-			tipc_sub_read(s, seq.upper));
+		pr_warn("Failed to subscribe for {%u,%u,%u}\n",
+			type, sub->s.seq.lower, sub->s.seq.upper);
 		res = false;
 	}
 	spin_unlock_bh(&tn->nametbl_lock);
@@ -816,16 +853,18 @@ bool tipc_nametbl_subscribe(struct tipc_subscription *sub)
 
 /**
  * tipc_nametbl_unsubscribe - remove a subscription object from name table
+ * @sub: subscription to remove
  */
 void tipc_nametbl_unsubscribe(struct tipc_subscription *sub)
 {
 	struct tipc_net *tn = tipc_net(sub->net);
-	struct tipc_subscr *s = &sub->evt.s;
-	u32 type = tipc_sub_read(s, seq.type);
 	struct tipc_service *sc;
+	struct tipc_uaddr ua;
 
+	tipc_uaddr(&ua, TIPC_SERVICE_RANGE, TIPC_NODE_SCOPE,
+		   sub->s.seq.type, sub->s.seq.lower, sub->s.seq.upper);
 	spin_lock_bh(&tn->nametbl_lock);
-	sc = tipc_service_find(sub->net, type);
+	sc = tipc_service_find(sub->net, &ua);
 	if (!sc)
 		goto exit;
 
@@ -865,7 +904,9 @@ int tipc_nametbl_init(struct net *net)
 }
 
 /**
- *  tipc_service_delete - purge all publications for a service and delete it
+ * tipc_service_delete - purge all publications for a service and delete it
+ * @net: the associated network namespace
+ * @sc: tipc_service to delete
  */
 static void tipc_service_delete(struct net *net, struct tipc_service *sc)
 {
@@ -875,7 +916,7 @@ static void tipc_service_delete(struct net *net, struct tipc_service *sc)
 	spin_lock_bh(&sc->lock);
 	rbtree_postorder_for_each_entry_safe(sr, tmpr, &sc->ranges, tree_node) {
 		list_for_each_entry_safe(p, tmp, &sr->all_publ, all_publ) {
-			tipc_service_remove_publ(sr, p->node, p->key);
+			tipc_service_remove_publ(sr, &p->sk, p->key);
 			kfree_rcu(p, rcu);
 		}
 		rb_erase_augmented(&sr->tree_node, &sc->ranges, &sr_callbacks);
@@ -926,7 +967,7 @@ static int __tipc_nl_add_nametable_publ(struct tipc_nl_msg *msg,
 		list_for_each_entry(p, &sr->all_publ, all_publ)
 			if (p->key == *last_key)
 				break;
-		if (p->key != *last_key)
+		if (list_entry_is_head(p, &sr->all_publ, all_publ))
 			return -EPIPE;
 	} else {
 		p = list_first_entry(&sr->all_publ,
@@ -959,9 +1000,9 @@ static int __tipc_nl_add_nametable_publ(struct tipc_nl_msg *msg,
 			goto publ_msg_full;
 		if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_SCOPE, p->scope))
 			goto publ_msg_full;
-		if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_NODE, p->node))
+		if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_NODE, p->sk.node))
 			goto publ_msg_full;
-		if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_REF, p->port))
+		if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_REF, p->sk.ref))
 			goto publ_msg_full;
 		if (nla_put_u32(msg->skb, TIPC_NLA_PUBL_KEY, p->key))
 			goto publ_msg_full;
@@ -1012,6 +1053,7 @@ static int tipc_nl_service_list(struct net *net, struct tipc_nl_msg *msg,
 	struct tipc_net *tn = tipc_net(net);
 	struct tipc_service *service = NULL;
 	struct hlist_head *head;
+	struct tipc_uaddr ua;
 	int err;
 	int i;
 
@@ -1025,7 +1067,9 @@ static int tipc_nl_service_list(struct net *net, struct tipc_nl_msg *msg,
 
 		if (*last_type ||
 		    (!i && *last_key && (*last_lower == *last_key))) {
-			service = tipc_service_find(net, *last_type);
+			tipc_uaddr(&ua, TIPC_SERVICE_RANGE, TIPC_NODE_SCOPE,
+				   *last_type, *last_lower, *last_lower);
+			service = tipc_service_find(net, &ua);
 			if (!service)
 				return -EPIPE;
 		} else {
@@ -1158,14 +1202,3 @@ void tipc_dest_list_purge(struct list_head *l)
 		kfree(dst);
 	}
 }
-
-int tipc_dest_list_len(struct list_head *l)
-{
-	struct tipc_dest *dst;
-	int i = 0;
-
-	list_for_each_entry(dst, l, list) {
-		i++;
-	}
-	return i;
-}