Merge branch 'tipc-Sep17-2011' of git://openlinux.windriver.com/people/paulg/net-next

net/tipc/bcast.c

···
 #include "link.h"
 #include "port.h"
 #include "bcast.h"
+#include "name_distr.h"
 
 #define MAX_PKT_DEFAULT_MCAST 1500	/* bcast link max packet size (fixed) */
 
···
 		msg_set_bcgap_to(msg, n_ptr->bclink.gap_to);
 		msg_set_bcast_tag(msg, tipc_own_tag);
 
-		if (tipc_bearer_send(&bcbearer->bearer, buf, NULL)) {
-			bcl->stats.sent_nacks++;
-			buf_discard(buf);
-		} else {
-			tipc_bearer_schedule(bcl->b_ptr, bcl);
-			bcl->proto_msg_queue = buf;
-			bcl->stats.bearer_congs++;
-		}
+		tipc_bearer_send(&bcbearer->bearer, buf, NULL);
+		bcl->stats.sent_nacks++;
+		buf_discard(buf);
 
 		/*
 		 * Ensure we doesn't send another NACK msg to the node
···
 void tipc_bclink_recv_pkt(struct sk_buff *buf)
 {
 	struct tipc_msg *msg = buf_msg(buf);
-	struct tipc_node *node = tipc_node_find(msg_prevnode(msg));
+	struct tipc_node *node;
 	u32 next_in;
 	u32 seqno;
 	struct sk_buff *deferred;
 
-	if (unlikely(!node || !tipc_node_is_up(node) || !node->bclink.supported ||
-		     (msg_mc_netid(msg) != tipc_net_id))) {
-		buf_discard(buf);
-		return;
-	}
+	/* Screen out unwanted broadcast messages */
+
+	if (msg_mc_netid(msg) != tipc_net_id)
+		goto exit;
+
+	node = tipc_node_find(msg_prevnode(msg));
+	if (unlikely(!node))
+		goto exit;
+
+	tipc_node_lock(node);
+	if (unlikely(!node->bclink.supported))
+		goto unlock;
 
 	if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) {
+		if (msg_type(msg) != STATE_MSG)
+			goto unlock;
 		if (msg_destnode(msg) == tipc_own_addr) {
-			tipc_node_lock(node);
 			tipc_bclink_acknowledge(node, msg_bcast_ack(msg));
 			tipc_node_unlock(node);
 			spin_lock_bh(&bc_lock);
···
 					      msg_bcgap_to(msg));
 			spin_unlock_bh(&bc_lock);
 		} else {
+			tipc_node_unlock(node);
 			tipc_bclink_peek_nack(msg_destnode(msg),
 					      msg_bcast_tag(msg),
 					      msg_bcgap_after(msg),
 					      msg_bcgap_to(msg));
 		}
-		buf_discard(buf);
-		return;
+		goto exit;
 	}
 
-	tipc_node_lock(node);
+	/* Handle in-sequence broadcast message */
+
 receive:
-	deferred = node->bclink.deferred_head;
 	next_in = mod(node->bclink.last_in + 1);
 	seqno = msg_seqno(msg);
 
···
 		}
 		if (likely(msg_isdata(msg))) {
 			tipc_node_unlock(node);
-			tipc_port_recv_mcast(buf, NULL);
+			if (likely(msg_mcast(msg)))
+				tipc_port_recv_mcast(buf, NULL);
+			else
+				buf_discard(buf);
 		} else if (msg_user(msg) == MSG_BUNDLER) {
 			bcl->stats.recv_bundles++;
 			bcl->stats.recv_bundled += msg_msgcnt(msg);
···
 				bcl->stats.recv_fragmented++;
 			tipc_node_unlock(node);
 			tipc_net_route_msg(buf);
+		} else if (msg_user(msg) == NAME_DISTRIBUTOR) {
+			tipc_node_unlock(node);
+			tipc_named_recv(buf);
 		} else {
 			tipc_node_unlock(node);
-			tipc_net_route_msg(buf);
+			buf_discard(buf);
 		}
+		buf = NULL;
+		tipc_node_lock(node);
+		deferred = node->bclink.deferred_head;
 		if (deferred && (buf_seqno(deferred) == mod(next_in + 1))) {
-			tipc_node_lock(node);
 			buf = deferred;
 			msg = buf_msg(buf);
 			node->bclink.deferred_head = deferred->next;
 			goto receive;
 		}
-		return;
 	} else if (less(next_in, seqno)) {
 		u32 gap_after = node->bclink.gap_after;
 		u32 gap_to = node->bclink.gap_to;
···
 			else if (less(gap_after, seqno) && less(seqno, gap_to))
 				node->bclink.gap_to = seqno;
 		}
+		buf = NULL;
 		if (bclink_ack_allowed(node->bclink.nack_sync)) {
 			if (gap_to != gap_after)
 				bclink_send_nack(node);
···
 		}
 	} else {
 		bcl->stats.duplicates++;
-		buf_discard(buf);
 	}
+unlock:
 	tipc_node_unlock(node);
+exit:
+	buf_discard(buf);
 }
 
 u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr)
···
 /**
  * tipc_bcbearer_send - send a packet through the broadcast pseudo-bearer
  *
- * Send through as many bearers as necessary to reach all nodes
- * that support TIPC multicasting.
+ * Send packet over as many bearers as necessary to reach all nodes
+ * that have joined the broadcast link.
  *
- * Returns 0 if packet sent successfully, non-zero if not
+ * Returns 0 (packet sent successfully) under all circumstances,
+ * since the broadcast link's pseudo-bearer never blocks
  */
 
 static int tipc_bcbearer_send(struct sk_buff *buf,
···
 {
 	int bp_index;
 
-	/* Prepare buffer for broadcasting (if first time trying to send it) */
+	/*
+	 * Prepare broadcast link message for reliable transmission,
+	 * if first time trying to send it;
+	 * preparation is skipped for broadcast link protocol messages
+	 * since they are sent in an unreliable manner and don't need it
+	 */
 
 	if (likely(!msg_non_seq(buf_msg(buf)))) {
 		struct tipc_msg *msg;
···
 		}
 
 		if (bcbearer->remains_new.count == 0)
-			return 0;
+			break;	/* all targets reached */
 
 		bcbearer->remains = bcbearer->remains_new;
 	}
 
-	/*
-	 * Unable to reach all targets (indicate success, since currently
-	 * there isn't code in place to properly block & unblock the
-	 * pseudo-bearer used by the broadcast link)
-	 */
-
-	return TIPC_OK;
+	return 0;
 }
 
 /**
···
 		bp_curr++;
 	}
 
-	spin_unlock_bh(&bc_lock);
-}
-
-/**
- * tipc_bcbearer_push - resolve bearer congestion
- *
- * Forces bclink to push out any unsent packets, until all packets are gone
- * or congestion reoccurs.
- * No locks set when function called
- */
-
-void tipc_bcbearer_push(void)
-{
-	struct tipc_bearer *b_ptr;
-
-	spin_lock_bh(&bc_lock);
-	b_ptr = &bcbearer->bearer;
-	if (b_ptr->blocked) {
-		b_ptr->blocked = 0;
-		tipc_bearer_lock_push(b_ptr);
-	}
 	spin_unlock_bh(&bc_lock);
 }
 
···
 	bcbearer = kzalloc(sizeof(*bcbearer), GFP_ATOMIC);
 	bclink = kzalloc(sizeof(*bclink), GFP_ATOMIC);
 	if (!bcbearer || !bclink) {
-		warn("Multicast link creation failed, no memory\n");
+		warn("Broadcast link creation failed, no memory\n");
 		kfree(bcbearer);
 		bcbearer = NULL;
 		kfree(bclink);
···
 	INIT_LIST_HEAD(&bcbearer->bearer.cong_links);
 	bcbearer->bearer.media = &bcbearer->media;
 	bcbearer->media.send_msg = tipc_bcbearer_send;
-	sprintf(bcbearer->media.name, "tipc-multicast");
+	sprintf(bcbearer->media.name, "tipc-broadcast");
 
 	bcl = &bclink->link;
 	INIT_LIST_HEAD(&bcl->waiting_ports);

net/tipc/bcast.h

···
 int  tipc_bclink_reset_stats(void);
 int  tipc_bclink_set_queue_limits(u32 limit);
 void tipc_bcbearer_sort(void);
-void tipc_bcbearer_push(void);
 
 #endif

net/tipc/bearer.c

···
 
 void tipc_bearer_lock_push(struct tipc_bearer *b_ptr)
 {
-	int res;
-
 	spin_lock_bh(&b_ptr->lock);
-	res = bearer_push(b_ptr);
+	bearer_push(b_ptr);
 	spin_unlock_bh(&b_ptr->lock);
-	if (res)
-		tipc_bcbearer_push();
 }
 
 
···
 	info("Blocking bearer <%s>\n", name);
 	spin_lock_bh(&b_ptr->lock);
 	b_ptr->blocked = 1;
+	list_splice_init(&b_ptr->cong_links, &b_ptr->links);
 	list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) {
 		struct tipc_node *n_ptr = l_ptr->owner;
 
···
 	spin_lock_bh(&b_ptr->lock);
 	b_ptr->blocked = 1;
 	b_ptr->media->disable_bearer(b_ptr);
+	list_splice_init(&b_ptr->cong_links, &b_ptr->links);
 	list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) {
 		tipc_link_delete(l_ptr);
 	}

net/tipc/bearer.h

···
 
 #include "bcast.h"
 
-#define MAX_BEARERS 8
-#define MAX_MEDIA 4
+#define MAX_BEARERS	2
+#define MAX_MEDIA	2
 
 /*
  * Identifiers of supported TIPC media types

net/tipc/config.h

···
 				const void *req_tlv_area, int req_tlv_space,
 				int headroom);
 
-void tipc_cfg_link_event(u32 addr, char *name, int up);
 int  tipc_cfg_init(void);
 void tipc_cfg_stop(void);
 

net/tipc/discover.c

···
 	}
 	tipc_node_lock(n_ptr);
 
-	/* Don't talk to neighbor during cleanup after last session */
-	if (n_ptr->cleanup_required) {
-		tipc_node_unlock(n_ptr);
-		return;
-	}
-
 	link = n_ptr->links[b_ptr->identity];
 
 	/* Create a link endpoint for this bearer, if necessary */

net/tipc/eth_media.c

···
  * net/tipc/eth_media.c: Ethernet bearer support for TIPC
  *
  * Copyright (c) 2001-2007, Ericsson AB
- * Copyright (c) 2005-2007, Wind River Systems
+ * Copyright (c) 2005-2008, 2011, Wind River Systems
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
···
 #include "core.h"
 #include "bearer.h"
 
-#define MAX_ETH_BEARERS		2
+#define MAX_ETH_BEARERS		MAX_BEARERS
 #define ETH_LINK_PRIORITY	TIPC_DEF_LINK_PRI
 #define ETH_LINK_TOLERANCE	TIPC_DEF_LINK_TOL
 #define ETH_LINK_WINDOW		TIPC_DEF_LINK_WIN
···
 
 	/* Find device with specified name */
 
+	read_lock(&dev_base_lock);
 	for_each_netdev(&init_net, pdev) {
 		if (!strncmp(pdev->name, driver_name, IFNAMSIZ)) {
 			dev = pdev;
+			dev_hold(dev);
 			break;
 		}
 	}
+	read_unlock(&dev_base_lock);
 	if (!dev)
 		return -ENODEV;
 
-	/* Find Ethernet bearer for device (or create one) */
+	/* Create Ethernet bearer for device */
 
-	while ((eb_ptr != stop) && eb_ptr->dev && (eb_ptr->dev != dev))
-		eb_ptr++;
-	if (eb_ptr == stop)
-		return -EDQUOT;
-	if (!eb_ptr->dev) {
-		eb_ptr->dev = dev;
-		eb_ptr->tipc_packet_type.type = htons(ETH_P_TIPC);
-		eb_ptr->tipc_packet_type.dev = dev;
-		eb_ptr->tipc_packet_type.func = recv_msg;
-		eb_ptr->tipc_packet_type.af_packet_priv = eb_ptr;
-		INIT_LIST_HEAD(&(eb_ptr->tipc_packet_type.list));
-		dev_hold(dev);
-		dev_add_pack(&eb_ptr->tipc_packet_type);
-	}
+	eb_ptr->dev = dev;
+	eb_ptr->tipc_packet_type.type = htons(ETH_P_TIPC);
+	eb_ptr->tipc_packet_type.dev = dev;
+	eb_ptr->tipc_packet_type.func = recv_msg;
+	eb_ptr->tipc_packet_type.af_packet_priv = eb_ptr;
+	INIT_LIST_HEAD(&(eb_ptr->tipc_packet_type.list));
+	dev_add_pack(&eb_ptr->tipc_packet_type);
 
 	/* Associate TIPC bearer with Ethernet bearer */
 

net/tipc/link.c

···
 
 	l_ptr->addr = peer;
 	if_name = strchr(b_ptr->name, ':') + 1;
-	sprintf(l_ptr->name, "%u.%u.%u:%s-%u.%u.%u:",
+	sprintf(l_ptr->name, "%u.%u.%u:%s-%u.%u.%u:unknown",
 		tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
 		tipc_node(tipc_own_addr),
 		if_name,
 		tipc_zone(peer), tipc_cluster(peer), tipc_node(peer));
-		/* note: peer i/f is appended to link name by reset/activate */
+		/* note: peer i/f name is updated by reset/activate message */
 	memcpy(&l_ptr->media_addr, media_addr, sizeof(*media_addr));
 	l_ptr->owner = n_ptr;
 	l_ptr->checkpoint = 1;
+	l_ptr->peer_session = INVALID_SESSION;
 	l_ptr->b_ptr = b_ptr;
 	link_set_supervision_props(l_ptr, b_ptr->media->tolerance);
 	l_ptr->state = RESET_UNKNOWN;
···
 	l_ptr->proto_msg_queue = NULL;
 }
 
-/* LINK EVENT CODE IS NOT SUPPORTED AT PRESENT */
-#define link_send_event(fcn, l_ptr, up) do { } while (0)
-
 void tipc_link_reset(struct link *l_ptr)
 {
 	struct sk_buff *buf;
···
 	l_ptr->fsm_msg_cnt = 0;
 	l_ptr->stale_count = 0;
 	link_reset_statistics(l_ptr);
-
-	link_send_event(tipc_cfg_link_event, l_ptr, 0);
-	if (!in_own_cluster(l_ptr->addr))
-		link_send_event(tipc_disc_link_event, l_ptr, 0);
 }
 
 
···
 	l_ptr->next_in_no = l_ptr->stats.recv_info = 1;
 	tipc_node_link_up(l_ptr->owner, l_ptr);
 	tipc_bearer_add_dest(l_ptr->b_ptr, l_ptr->addr);
-	link_send_event(tipc_cfg_link_event, l_ptr, 1);
-	if (!in_own_cluster(l_ptr->addr))
-		link_send_event(tipc_disc_link_event, l_ptr, 1);
 }
 
 /**
···
 }
 
 /*
+ * tipc_link_send_names - send name table entries to new neighbor
+ *
+ * Send routine for bulk delivery of name table messages when contact
+ * with a new neighbor occurs. No link congestion checking is performed
+ * because name table messages *must* be delivered. The messages must be
+ * small enough not to require fragmentation.
+ * Called without any locks held.
+ */
+
+void tipc_link_send_names(struct list_head *message_list, u32 dest)
+{
+	struct tipc_node *n_ptr;
+	struct link *l_ptr;
+	struct sk_buff *buf;
+	struct sk_buff *temp_buf;
+
+	if (list_empty(message_list))
+		return;
+
+	read_lock_bh(&tipc_net_lock);
+	n_ptr = tipc_node_find(dest);
+	if (n_ptr) {
+		tipc_node_lock(n_ptr);
+		l_ptr = n_ptr->active_links[0];
+		if (l_ptr) {
+			/* convert circular list to linear list */
+			((struct sk_buff *)message_list->prev)->next = NULL;
+			link_add_chain_to_outqueue(l_ptr,
+				(struct sk_buff *)message_list->next, 0);
+			tipc_link_push_queue(l_ptr);
+			INIT_LIST_HEAD(message_list);
+		}
+		tipc_node_unlock(n_ptr);
+	}
+	read_unlock_bh(&tipc_net_lock);
+
+	/* discard the messages if they couldn't be sent */
+
+	list_for_each_safe(buf, temp_buf, ((struct sk_buff *)message_list)) {
+		list_del((struct list_head *)buf);
+		buf_discard(buf);
+	}
+}
+
+/*
  * link_send_buf_fast: Entry for data messages where the
  * destination link is known and the header is complete,
  * inclusive total message length. Very time critical.
···
 	int res;
 	u32 selector = msg_origport(buf_msg(buf)) & 1;
 	u32 dummy;
-
-	if (destnode == tipc_own_addr)
-		return tipc_port_recv_msg(buf);
 
 	read_lock_bh(&tipc_net_lock);
 	n_ptr = tipc_node_find(destnode);
···
 			continue;
 		}
 
+		/* Discard unicast link messages destined for another node */
+
 		if (unlikely(!msg_short(msg) &&
 			     (msg_destnode(msg) != tipc_own_addr)))
 			goto cont;
-
-		/* Discard non-routeable messages destined for another node */
-
-		if (unlikely(!msg_isdata(msg) &&
-			     (msg_destnode(msg) != tipc_own_addr))) {
-			if ((msg_user(msg) != CONN_MANAGER) &&
-			    (msg_user(msg) != MSG_FRAGMENTER))
-				goto cont;
-		}
 
 		/* Locate neighboring node that sent message */
 
···
 			goto cont;
 		tipc_node_lock(n_ptr);
 
-		/* Don't talk to neighbor during cleanup after last session */
-
-		if (n_ptr->cleanup_required) {
-			tipc_node_unlock(n_ptr);
-			goto cont;
-		}
-
 		/* Locate unicast link endpoint that should handle message */
 
 		l_ptr = n_ptr->links[b_ptr->identity];
 		if (unlikely(!l_ptr)) {
+			tipc_node_unlock(n_ptr);
+			goto cont;
+		}
+
+		/* Verify that communication with node is currently allowed */
+
+		if ((n_ptr->block_setup & WAIT_PEER_DOWN) &&
+			msg_user(msg) == LINK_PROTOCOL &&
+			(msg_type(msg) == RESET_MSG ||
+					msg_type(msg) == ACTIVATE_MSG) &&
+			!msg_redundant_link(msg))
+			n_ptr->block_setup &= ~WAIT_PEER_DOWN;
+
+		if (n_ptr->block_setup) {
 			tipc_node_unlock(n_ptr);
 			goto cont;
 		}
···
 
 	if (link_blocked(l_ptr))
 		return;
+
+	/* Abort non-RESET send if communication with node is prohibited */
+
+	if ((l_ptr->owner->block_setup) && (msg_typ != RESET_MSG))
+		return;
+
 	msg_set_type(msg, msg_typ);
 	msg_set_net_plane(msg, l_ptr->b_ptr->net_plane);
 	msg_set_bcast_ack(msg, mod(l_ptr->owner->bclink.last_in));
···
 	case RESET_MSG:
 		if (!link_working_unknown(l_ptr) &&
 		    (l_ptr->peer_session != INVALID_SESSION)) {
-			if (msg_session(msg) == l_ptr->peer_session)
-				break; /* duplicate: ignore */
+			if (less_eq(msg_session(msg), l_ptr->peer_session))
+				break; /* duplicate or old reset: ignore */
 		}
+
+		if (!msg_redundant_link(msg) && (link_working_working(l_ptr) ||
+				link_working_unknown(l_ptr))) {
+			/*
+			 * peer has lost contact -- don't allow peer's links
+			 * to reactivate before we recognize loss & clean up
+			 */
+			l_ptr->owner->block_setup = WAIT_NODE_DOWN;
+		}
+
 		/* fall thru' */
 	case ACTIVATE_MSG:
 		/* Update link settings according other endpoint's values */

net/tipc/link.h

···
 struct sk_buff *tipc_link_cmd_reset_stats(const void *req_tlv_area, int req_tlv_space);
 void tipc_link_reset(struct link *l_ptr);
 int tipc_link_send(struct sk_buff *buf, u32 dest, u32 selector);
+void tipc_link_send_names(struct list_head *message_list, u32 dest);
 int tipc_link_send_buf(struct link *l_ptr, struct sk_buff *buf);
 u32 tipc_link_get_max_pkt(u32 dest, u32 selector);
 int tipc_link_send_sections_fast(struct tipc_port *sender,

net/tipc/name_distr.c

···
  * tipc_named_node_up - tell specified node about all publications by this node
  */
 
-void tipc_named_node_up(unsigned long node)
+void tipc_named_node_up(unsigned long nodearg)
 {
+	struct tipc_node *n_ptr;
+	struct link *l_ptr;
 	struct publication *publ;
 	struct distr_item *item = NULL;
 	struct sk_buff *buf = NULL;
+	struct list_head message_list;
+	u32 node = (u32)nodearg;
 	u32 left = 0;
 	u32 rest;
-	u32 max_item_buf;
+	u32 max_item_buf = 0;
+
+	/* compute maximum amount of publication data to send per message */
+
+	read_lock_bh(&tipc_net_lock);
+	n_ptr = tipc_node_find(node);
+	if (n_ptr) {
+		tipc_node_lock(n_ptr);
+		l_ptr = n_ptr->active_links[0];
+		if (l_ptr)
+			max_item_buf = ((l_ptr->max_pkt - INT_H_SIZE) /
+				ITEM_SIZE) * ITEM_SIZE;
+		tipc_node_unlock(n_ptr);
+	}
+	read_unlock_bh(&tipc_net_lock);
+	if (!max_item_buf)
+		return;
+
+	/* create list of publication messages, then send them as a unit */
+
+	INIT_LIST_HEAD(&message_list);
 
 	read_lock_bh(&tipc_nametbl_lock);
-	max_item_buf = TIPC_MAX_USER_MSG_SIZE / ITEM_SIZE;
-	max_item_buf *= ITEM_SIZE;
 	rest = publ_cnt * ITEM_SIZE;
 
 	list_for_each_entry(publ, &publ_root, local_list) {
···
 		item++;
 		left -= ITEM_SIZE;
 		if (!left) {
-			msg_set_link_selector(buf_msg(buf), node);
-			tipc_link_send(buf, node, node);
+			list_add_tail((struct list_head *)buf, &message_list);
 			buf = NULL;
 		}
 	}
 exit:
 	read_unlock_bh(&tipc_nametbl_lock);
+
+	tipc_link_send_names(&message_list, (u32)node);
 }
 
 /**

net/tipc/net.c

···
 		return;
 	msg = buf_msg(buf);
 
-	msg_incr_reroute_cnt(msg);
-	if (msg_reroute_cnt(msg) > 6) {
-		if (msg_errcode(msg)) {
-			buf_discard(buf);
-		} else {
-			tipc_reject_msg(buf, msg_destport(msg) ?
-					TIPC_ERR_NO_PORT : TIPC_ERR_NO_NAME);
-		}
-		return;
-	}
-
 	/* Handle message for this node */
 	dnode = msg_short(msg) ? tipc_own_addr : msg_destnode(msg);
 	if (tipc_in_scope(dnode, tipc_own_addr)) {

net/tipc/node.c

···
 			break;
 	}
 	list_add_tail(&n_ptr->list, &temp_node->list);
+	n_ptr->block_setup = WAIT_PEER_DOWN;
 
 	tipc_num_nodes++;
 
···
 	}
 }
 
-static void node_cleanup_finished(unsigned long node_addr)
+static void node_name_purge_complete(unsigned long node_addr)
 {
 	struct tipc_node *n_ptr;
 
···
 	n_ptr = tipc_node_find(node_addr);
 	if (n_ptr) {
 		tipc_node_lock(n_ptr);
-		n_ptr->cleanup_required = 0;
+		n_ptr->block_setup &= ~WAIT_NAMES_GONE;
 		tipc_node_unlock(n_ptr);
 	}
 	read_unlock_bh(&tipc_net_lock);
···
 	char addr_string[16];
 	u32 i;
 
-	/* Clean up broadcast reception remains */
-	n_ptr->bclink.gap_after = n_ptr->bclink.gap_to = 0;
-	while (n_ptr->bclink.deferred_head) {
-		struct sk_buff *buf = n_ptr->bclink.deferred_head;
-		n_ptr->bclink.deferred_head = buf->next;
-		buf_discard(buf);
-	}
-	if (n_ptr->bclink.defragm) {
-		buf_discard(n_ptr->bclink.defragm);
-		n_ptr->bclink.defragm = NULL;
-	}
-
-	if (n_ptr->bclink.supported) {
-		tipc_bclink_acknowledge(n_ptr,
-					mod(n_ptr->bclink.acked + 10000));
-		tipc_nmap_remove(&tipc_bcast_nmap, n_ptr->addr);
-		if (n_ptr->addr < tipc_own_addr)
-			tipc_own_tag--;
-	}
-
 	info("Lost contact with %s\n",
 	     tipc_addr_string_fill(addr_string, n_ptr->addr));
+
+	/* Flush broadcast link info associated with lost node */
+
+	if (n_ptr->bclink.supported) {
+		n_ptr->bclink.gap_after = n_ptr->bclink.gap_to = 0;
+		while (n_ptr->bclink.deferred_head) {
+			struct sk_buff *buf = n_ptr->bclink.deferred_head;
+			n_ptr->bclink.deferred_head = buf->next;
+			buf_discard(buf);
+		}
+
+		if (n_ptr->bclink.defragm) {
+			buf_discard(n_ptr->bclink.defragm);
+			n_ptr->bclink.defragm = NULL;
+		}
+
+		tipc_nmap_remove(&tipc_bcast_nmap, n_ptr->addr);
+		tipc_bclink_acknowledge(n_ptr,
+					mod(n_ptr->bclink.acked + 10000));
+		if (n_ptr->addr < tipc_own_addr)
+			tipc_own_tag--;
+
+		n_ptr->bclink.supported = 0;
+	}
 
 	/* Abort link changeover */
 	for (i = 0; i < MAX_BEARERS; i++) {
···
 	/* Notify subscribers */
 	tipc_nodesub_notify(n_ptr);
 
-	/* Prevent re-contact with node until all cleanup is done */
+	/* Prevent re-contact with node until cleanup is done */
 
-	n_ptr->cleanup_required = 1;
-	tipc_k_signal((Handler)node_cleanup_finished, n_ptr->addr);
+	n_ptr->block_setup = WAIT_PEER_DOWN | WAIT_NAMES_GONE;
+	tipc_k_signal((Handler)node_name_purge_complete, n_ptr->addr);
 }
 
 struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space)

net/tipc/node.h

···
 #include "net.h"
 #include "bearer.h"
 
+/* Flags used to block (re)establishment of contact with a neighboring node */
+
+#define WAIT_PEER_DOWN	0x0001	/* wait to see that peer's links are down */
+#define WAIT_NAMES_GONE	0x0002	/* wait for peer's publications to be purged */
+#define WAIT_NODE_DOWN	0x0004	/* wait until peer node is declared down */
+
 /**
  * struct tipc_node - TIPC node structure
  * @addr: network address of node
···
  * @active_links: pointers to active links to node
  * @links: pointers to all links to node
  * @working_links: number of working links to node (both active and standby)
- * @cleanup_required: non-zero if cleaning up after a prior loss of contact
+ * @block_setup: bit mask of conditions preventing link establishment to node
  * @link_cnt: number of links to node
  * @permit_changeover: non-zero if node has redundant links to this system
  * @bclink: broadcast-related info
···
 	struct link *links[MAX_BEARERS];
 	int link_cnt;
 	int working_links;
-	int cleanup_required;
+	int block_setup;
 	int permit_changeover;
 	struct {
 		int supported;

net/tipc/socket.c

···
 	struct sock sk;
 	struct tipc_port *p;
 	struct tipc_portid peer_name;
-	long conn_timeout;
+	unsigned int conn_timeout;
 };
 
 #define tipc_sk(sk) ((struct tipc_sock *)(sk))
···
 	sock_init_data(sock, sk);
 	sk->sk_backlog_rcv = backlog_rcv;
 	tipc_sk(sk)->p = tp_ptr;
-	tipc_sk(sk)->conn_timeout = msecs_to_jiffies(CONN_TIMEOUT_DEFAULT);
+	tipc_sk(sk)->conn_timeout = CONN_TIMEOUT_DEFAULT;
 
 	spin_unlock_bh(tp_ptr->lock);
 
···
 	struct tipc_port *tport = tipc_sk_port(sk);
 	struct sockaddr_tipc *dest = (struct sockaddr_tipc *)m->msg_name;
 	int needs_conn;
+	long timeout_val;
 	int res = -EINVAL;
 
 	if (unlikely(!dest))
···
 		reject_rx_queue(sk);
 	}
 
+	timeout_val = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
+
 	do {
 		if (dest->addrtype == TIPC_ADDR_NAME) {
 			res = dest_name_check(dest, m);
···
 				sock->state = SS_CONNECTING;
 			break;
 		}
-		if (m->msg_flags & MSG_DONTWAIT) {
-			res = -EWOULDBLOCK;
+		if (timeout_val <= 0L) {
+			res = timeout_val ? timeout_val : -EWOULDBLOCK;
 			break;
 		}
 		release_sock(sk);
-		res = wait_event_interruptible(*sk_sleep(sk),
-					       !tport->congested);
+		timeout_val = wait_event_interruptible_timeout(*sk_sleep(sk),
+					       !tport->congested, timeout_val);
 		lock_sock(sk);
-		if (res)
-			break;
 	} while (1);
 
 exit:
···
 	struct sock *sk = sock->sk;
 	struct tipc_port *tport = tipc_sk_port(sk);
 	struct sockaddr_tipc *dest = (struct sockaddr_tipc *)m->msg_name;
+	long timeout_val;
 	int res;
 
 	/* Handle implied connection establishment */
···
 	if (iocb)
 		lock_sock(sk);
 
+	timeout_val = sock_sndtimeo(sk, m->msg_flags & MSG_DONTWAIT);
+
 	do {
 		if (unlikely(sock->state != SS_CONNECTED)) {
 			if (sock->state == SS_DISCONNECTING)
···
 				total_len);
 		if (likely(res != -ELINKCONG))
 			break;
-		if (m->msg_flags & MSG_DONTWAIT) {
-			res = -EWOULDBLOCK;
+		if (timeout_val <= 0L) {
+			res = timeout_val ? timeout_val : -EWOULDBLOCK;
 			break;
 		}
 		release_sock(sk);
-		res = wait_event_interruptible(*sk_sleep(sk),
-			(!tport->congested || !tport->connected));
+		timeout_val = wait_event_interruptible_timeout(*sk_sleep(sk),
+			(!tport->congested || !tport->connected), timeout_val);
 		lock_sock(sk);
-		if (res)
-			break;
 	} while (1);
 
 	if (iocb)
···
 	struct msghdr m = {NULL,};
 	struct sk_buff *buf;
 	struct tipc_msg *msg;
-	long timeout;
+	unsigned int timeout;
 	int res;
 
 	lock_sock(sk);
···
 	res = wait_event_interruptible_timeout(*sk_sleep(sk),
 			(!skb_queue_empty(&sk->sk_receive_queue) ||
 			(sock->state != SS_CONNECTING)),
-			timeout ? timeout : MAX_SCHEDULE_TIMEOUT);
+			timeout ? (long)msecs_to_jiffies(timeout)
+				: MAX_SCHEDULE_TIMEOUT);
 	lock_sock(sk);
 
 	if (res > 0) {
···
 
 	lock_sock(sk);
 
-	if (sock->state == SS_READY)
-		res = -EOPNOTSUPP;
-	else if (sock->state != SS_UNCONNECTED)
+	if (sock->state != SS_UNCONNECTED)
 		res = -EINVAL;
 	else {
 		sock->state = SS_LISTENING;
···
 
 	lock_sock(sk);
 
-	if (sock->state == SS_READY) {
-		res = -EOPNOTSUPP;
-		goto exit;
-	}
 	if (sock->state != SS_LISTENING) {
 		res = -EINVAL;
 		goto exit;
···
 		res = tipc_set_portunreturnable(tport->ref, value);
 		break;
 	case TIPC_CONN_TIMEOUT:
-		tipc_sk(sk)->conn_timeout = msecs_to_jiffies(value);
+		tipc_sk(sk)->conn_timeout = value;
 		/* no need to set "res", since already 0 at this point */
 		break;
 	default:
···
 		res = tipc_portunreturnable(tport->ref, &value);
 		break;
 	case TIPC_CONN_TIMEOUT:
-		value = jiffies_to_msecs(tipc_sk(sk)->conn_timeout);
+		value = tipc_sk(sk)->conn_timeout;
 		/* no need to set "res", since already 0 at this point */
 		break;
 	case TIPC_NODE_RECVQ_DEPTH:
···
 	.bind		= bind,
 	.connect	= connect,
 	.socketpair	= sock_no_socketpair,
-	.accept		= accept,
+	.accept		= sock_no_accept,
 	.getname	= get_name,
 	.poll		= poll,
 	.ioctl		= sock_no_ioctl,
-	.listen		= listen,
+	.listen		= sock_no_listen,
 	.shutdown	= shutdown,
 	.setsockopt	= setsockopt,
 	.getsockopt	= getsockopt,

net/tipc/subscr.c

···
 	if (!must && !(sub->filter & TIPC_SUB_PORTS))
 		return;
 
-	sub->event_cb(sub, found_lower, found_upper, event, port_ref, node);
+	subscr_send_event(sub, found_lower, found_upper, event, port_ref, node);
 }
 
 /**
···
 		subscr_terminate(subscriber);
 		return NULL;
 	}
-	sub->event_cb = subscr_send_event;
 	INIT_LIST_HEAD(&sub->nameseq_list);
 	list_add(&sub->subscription_list, &subscriber->subscription_list);
 	sub->server_ref = subscriber->port_ref;

net/tipc/subscr.h

···
 
 struct subscription;
 
-typedef void (*tipc_subscr_event) (struct subscription *sub,
-				   u32 found_lower, u32 found_upper,
-				   u32 event, u32 port_ref, u32 node);
-
 /**
  * struct subscription - TIPC network topology subscription object
  * @seq: name sequence associated with subscription
  * @timeout: duration of subscription (in ms)
  * @filter: event filtering to be done for subscription
- * @event_cb: routine invoked when a subscription event is detected
  * @timer: timer governing subscription duration (optional)
  * @nameseq_list: adjacent subscriptions in name sequence's subscription list
  * @subscription_list: adjacent subscriptions in subscriber's subscription list
···
 	struct tipc_name_seq seq;
 	u32 timeout;
 	u32 filter;
-	tipc_subscr_event event_cb;
 	struct timer_list timer;
 	struct list_head nameseq_list;
 	struct list_head subscription_list;