[TIPC] Initial merge

TIPC (Transparent Inter Process Communication) is a protocol designed for
intra cluster communication. For more information see
http://tipc.sourceforge.net

Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>

1 files changed, 1704 insertions, 0 deletions

diff --git a/net/tipc/port.c b/net/tipc/port.c
new file mode 100644
index 0000000..f0f228c
--- /dev/null
+++ b/net/tipc/port.c
@@ -0,0 +1,1704 @@
+/*
+ * net/tipc/port.c: TIPC port code
+ * 
+ * Copyright (c) 2003-2005, Ericsson Research Canada
+ * Copyright (c) 2004-2005, Wind River Systems
+ * Copyright (c) 2005-2006, Ericsson AB
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this 
+ * list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright notice, 
+ * this list of conditions and the following disclaimer in the documentation 
+ * and/or other materials provided with the distribution.
+ * Neither the names of the copyright holders nor the names of its 
+ * contributors may be used to endorse or promote products derived from this 
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "core.h"
+#include "config.h"
+#include "dbg.h"
+#include "port.h"
+#include "addr.h"
+#include "link.h"
+#include "node.h"
+#include "port.h"
+#include "name_table.h"
+#include "user_reg.h"
+#include "msg.h"
+#include "bcast.h"
+
+/* Connection management: */
+#define PROBING_INTERVAL 3600000	/* [ms] => 1 h */
+#define CONFIRMED 0
+#define PROBING 1
+
+#define MAX_REJECT_SIZE 1024
+
+static struct sk_buff *msg_queue_head = 0;
+static struct sk_buff *msg_queue_tail = 0;
+
+spinlock_t port_list_lock = SPIN_LOCK_UNLOCKED;
+static spinlock_t queue_lock = SPIN_LOCK_UNLOCKED;
+
+LIST_HEAD(ports);
+static void port_handle_node_down(unsigned long ref);
+static struct sk_buff* port_build_self_abort_msg(struct port *,u32 err);
+static struct sk_buff* port_build_peer_abort_msg(struct port *,u32 err);
+static void port_timeout(unsigned long ref);
+
+
+static inline u32 port_peernode(struct port *p_ptr)
+{
+	return msg_destnode(&p_ptr->publ.phdr);
+}
+
+static inline u32 port_peerport(struct port *p_ptr)
+{
+	return msg_destport(&p_ptr->publ.phdr);
+}
+
+static inline u32 port_out_seqno(struct port *p_ptr)
+{
+	return msg_transp_seqno(&p_ptr->publ.phdr);
+}
+
+static inline void port_set_out_seqno(struct port *p_ptr, u32 seqno) 
+{
+	msg_set_transp_seqno(&p_ptr->publ.phdr,seqno);
+}
+
+static inline void port_incr_out_seqno(struct port *p_ptr)
+{
+	struct tipc_msg *m = &p_ptr->publ.phdr;
+
+	if (likely(!msg_routed(m)))
+		return;
+	msg_set_transp_seqno(m, (msg_transp_seqno(m) + 1));
+}
+
+/**
+ * tipc_multicast - send a multicast message to local and remote destinations
+ */
+
+int tipc_multicast(u32 ref, struct tipc_name_seq const *seq, u32 domain,
+		   u32 num_sect, struct iovec const *msg_sect)
+{
+	struct tipc_msg *hdr;
+	struct sk_buff *buf;
+	struct sk_buff *ibuf = NULL;
+	struct port_list dports = {0, NULL, };
+	struct port *oport = port_deref(ref);
+	int ext_targets;
+	int res;
+
+	if (unlikely(!oport))
+		return -EINVAL;
+
+	/* Create multicast message */
+
+	hdr = &oport->publ.phdr;
+	msg_set_type(hdr, TIPC_MCAST_MSG);
+	msg_set_nametype(hdr, seq->type);
+	msg_set_namelower(hdr, seq->lower);
+	msg_set_nameupper(hdr, seq->upper);
+	msg_set_hdr_sz(hdr, MCAST_H_SIZE);
+	res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
+			!oport->user_port, &buf);
+	if (unlikely(!buf))
+		return res;
+
+	/* Figure out where to send multicast message */
+
+	ext_targets = nametbl_mc_translate(seq->type, seq->lower, seq->upper,
+					   TIPC_NODE_SCOPE, &dports);
+	
+	/* Send message to destinations (duplicate it only if necessary) */ 
+
+	if (ext_targets) {
+		if (dports.count != 0) {
+			ibuf = skb_copy(buf, GFP_ATOMIC);
+			if (ibuf == NULL) {
+				port_list_free(&dports);
+				buf_discard(buf);
+				return -ENOMEM;
+			}
+		}
+		res = bclink_send_msg(buf);
+		if ((res < 0) && (dports.count != 0)) {
+			buf_discard(ibuf);
+		}
+	} else {
+		ibuf = buf;
+	}
+
+	if (res >= 0) {
+		if (ibuf)
+			port_recv_mcast(ibuf, &dports);
+	} else {
+		port_list_free(&dports);
+	}
+	return res;
+}
+
+/**
+ * port_recv_mcast - deliver multicast message to all destination ports
+ * 
+ * If there is no port list, perform a lookup to create one
+ */
+
+void port_recv_mcast(struct sk_buff *buf, struct port_list *dp)
+{
+	struct tipc_msg* msg;
+	struct port_list dports = {0, NULL, };
+	struct port_list *item = dp;
+	int cnt = 0;
+
+	assert(buf);
+	msg = buf_msg(buf);
+
+	/* Create destination port list, if one wasn't supplied */
+
+	if (dp == NULL) {
+		nametbl_mc_translate(msg_nametype(msg),
+				     msg_namelower(msg),
+				     msg_nameupper(msg),
+				     TIPC_CLUSTER_SCOPE,
+				     &dports);
+		item = dp = &dports;
+	}
+
+	/* Deliver a copy of message to each destination port */
+
+	if (dp->count != 0) {
+		if (dp->count == 1) {
+			msg_set_destport(msg, dp->ports[0]);
+			port_recv_msg(buf);
+			port_list_free(dp);
+			return;
+		}
+		for (; cnt < dp->count; cnt++) {
+			int index = cnt % PLSIZE;
+			struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
+
+			if (b == NULL) {
+				warn("Buffer allocation failure\n");
+				msg_dbg(msg, "LOST:");
+				goto exit;
+			}
+			if ((index == 0) && (cnt != 0)) {
+				item = item->next;
+			}
+			msg_set_destport(buf_msg(b),item->ports[index]);
+			port_recv_msg(b);
+		}
+	}
+exit:
+	buf_discard(buf);
+	port_list_free(dp);
+}
+
+/**
+ * tipc_createport_raw - create a native TIPC port
+ * 
+ * Returns local port reference
+ */
+
+u32 tipc_createport_raw(void *usr_handle,
+			u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
+			void (*wakeup)(struct tipc_port *),
+			const u32 importance)
+{
+	struct port *p_ptr;
+	struct tipc_msg *msg;
+	u32 ref;
+
+	p_ptr = kmalloc(sizeof(*p_ptr), GFP_ATOMIC);
+	if (p_ptr == NULL) {
+		warn("Memory squeeze; failed to create port\n");
+		return 0;
+	}
+	memset(p_ptr, 0, sizeof(*p_ptr));
+	ref = ref_acquire(p_ptr, &p_ptr->publ.lock);
+	if (!ref) {
+		warn("Reference Table Exhausted\n");
+		kfree(p_ptr);
+		return 0;
+	}
+
+	port_lock(ref);
+	p_ptr->publ.ref = ref;
+	msg = &p_ptr->publ.phdr;
+	msg_init(msg, DATA_LOW, TIPC_NAMED_MSG, TIPC_OK, LONG_H_SIZE, 0);
+	msg_set_orignode(msg, tipc_own_addr);
+	msg_set_prevnode(msg, tipc_own_addr);
+	msg_set_origport(msg, ref);
+	msg_set_importance(msg,importance);
+	p_ptr->last_in_seqno = 41;
+	p_ptr->sent = 1;
+	p_ptr->publ.usr_handle = usr_handle;
+	INIT_LIST_HEAD(&p_ptr->wait_list);
+	INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
+	p_ptr->congested_link = 0;
+	p_ptr->max_pkt = MAX_PKT_DEFAULT;
+	p_ptr->dispatcher = dispatcher;
+	p_ptr->wakeup = wakeup;
+	p_ptr->user_port = 0;
+	k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
+	spin_lock_bh(&port_list_lock);
+	INIT_LIST_HEAD(&p_ptr->publications);
+	INIT_LIST_HEAD(&p_ptr->port_list);
+	list_add_tail(&p_ptr->port_list, &ports);
+	spin_unlock_bh(&port_list_lock);
+	port_unlock(p_ptr);
+	return ref;
+}
+
+int tipc_deleteport(u32 ref)
+{
+	struct port *p_ptr;
+	struct sk_buff *buf = 0;
+
+	tipc_withdraw(ref, 0, 0);
+	p_ptr = port_lock(ref);
+	if (!p_ptr) 
+		return -EINVAL;
+
+	ref_discard(ref);
+	port_unlock(p_ptr);
+
+	k_cancel_timer(&p_ptr->timer);
+	if (p_ptr->publ.connected) {
+		buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
+		nodesub_unsubscribe(&p_ptr->subscription);
+	}
+	if (p_ptr->user_port) {
+		reg_remove_port(p_ptr->user_port);
+		kfree(p_ptr->user_port);
+	}
+
+	spin_lock_bh(&port_list_lock);
+	list_del(&p_ptr->port_list);
+	list_del(&p_ptr->wait_list);
+	spin_unlock_bh(&port_list_lock);
+	k_term_timer(&p_ptr->timer);
+	kfree(p_ptr);
+	dbg("Deleted port %u\n", ref);
+	net_route_msg(buf);
+	return TIPC_OK;
+}
+
+/**
+ * tipc_get_port() - return port associated with 'ref'
+ * 
+ * Note: Port is not locked.
+ */
+
+struct tipc_port *tipc_get_port(const u32 ref)
+{
+	return (struct tipc_port *)ref_deref(ref);
+}
+
+/**
+ * tipc_get_handle - return user handle associated to port 'ref'
+ */
+
+void *tipc_get_handle(const u32 ref)
+{
+	struct port *p_ptr;
+	void * handle;
+
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return 0;
+	handle = p_ptr->publ.usr_handle;
+	port_unlock(p_ptr);
+	return handle;
+}
+
+static inline int port_unreliable(struct port *p_ptr)
+{
+	return msg_src_droppable(&p_ptr->publ.phdr);
+}
+
+int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
+{
+	struct port *p_ptr;
+	
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return -EINVAL;
+	*isunreliable = port_unreliable(p_ptr);
+	spin_unlock_bh(p_ptr->publ.lock);
+	return TIPC_OK;
+}
+
+int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
+{
+	struct port *p_ptr;
+	
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return -EINVAL;
+	msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
+	port_unlock(p_ptr);
+	return TIPC_OK;
+}
+
+static inline int port_unreturnable(struct port *p_ptr)
+{
+	return msg_dest_droppable(&p_ptr->publ.phdr);
+}
+
+int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
+{
+	struct port *p_ptr;
+	
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return -EINVAL;
+	*isunrejectable = port_unreturnable(p_ptr);
+	spin_unlock_bh(p_ptr->publ.lock);
+	return TIPC_OK;
+}
+
+int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
+{
+	struct port *p_ptr;
+	
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return -EINVAL;
+	msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
+	port_unlock(p_ptr);
+	return TIPC_OK;
+}
+
+/* 
+ * port_build_proto_msg(): build a port level protocol 
+ * or a connection abortion message. Called with 
+ * tipc_port lock on.
+ */
+static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
+					    u32 origport, u32 orignode,
+					    u32 usr, u32 type, u32 err, 
+					    u32 seqno, u32 ack)
+{
+	struct sk_buff *buf;
+	struct tipc_msg *msg;
+	
+	buf = buf_acquire(LONG_H_SIZE);
+	if (buf) {
+		msg = buf_msg(buf);
+		msg_init(msg, usr, type, err, LONG_H_SIZE, destnode);
+		msg_set_destport(msg, destport);
+		msg_set_origport(msg, origport);
+		msg_set_destnode(msg, destnode);
+		msg_set_orignode(msg, orignode);
+		msg_set_transp_seqno(msg, seqno);
+		msg_set_msgcnt(msg, ack);
+		msg_dbg(msg, "PORT>SEND>:");
+	}
+	return buf;
+}
+
+int tipc_set_msg_option(struct tipc_port *tp_ptr, const char *opt, const u32 sz)
+{
+	msg_expand(&tp_ptr->phdr, msg_destnode(&tp_ptr->phdr));
+	msg_set_options(&tp_ptr->phdr, opt, sz);
+	return TIPC_OK;
+}
+
+int tipc_reject_msg(struct sk_buff *buf, u32 err)
+{
+	struct tipc_msg *msg = buf_msg(buf);
+	struct sk_buff *rbuf;
+	struct tipc_msg *rmsg;
+	int hdr_sz;
+	u32 imp = msg_importance(msg);
+	u32 data_sz = msg_data_sz(msg);
+
+	if (data_sz > MAX_REJECT_SIZE)
+		data_sz = MAX_REJECT_SIZE;
+	if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
+		imp++;
+	msg_dbg(msg, "port->rej: ");
+
+	/* discard rejected message if it shouldn't be returned to sender */
+	if (msg_errcode(msg) || msg_dest_droppable(msg)) {
+		buf_discard(buf);
+		return data_sz;
+	}
+
+	/* construct rejected message */
+	if (msg_mcast(msg))
+		hdr_sz = MCAST_H_SIZE;
+	else
+		hdr_sz = LONG_H_SIZE;
+	rbuf = buf_acquire(data_sz + hdr_sz);
+	if (rbuf == NULL) {
+		buf_discard(buf);
+		return data_sz;
+	}
+	rmsg = buf_msg(rbuf);
+	msg_init(rmsg, imp, msg_type(msg), err, hdr_sz, msg_orignode(msg));
+	msg_set_destport(rmsg, msg_origport(msg));
+	msg_set_prevnode(rmsg, tipc_own_addr);
+	msg_set_origport(rmsg, msg_destport(msg));
+	if (msg_short(msg))
+		msg_set_orignode(rmsg, tipc_own_addr);
+	else
+		msg_set_orignode(rmsg, msg_destnode(msg));
+	msg_set_size(rmsg, data_sz + hdr_sz); 
+	msg_set_nametype(rmsg, msg_nametype(msg));
+	msg_set_nameinst(rmsg, msg_nameinst(msg));
+	memcpy(rbuf->data + hdr_sz, msg_data(msg), data_sz);
+
+	/* send self-abort message when rejecting on a connected port */
+	if (msg_connected(msg)) {
+		struct sk_buff *abuf = 0;
+		struct port *p_ptr = port_lock(msg_destport(msg));
+
+		if (p_ptr) {
+			if (p_ptr->publ.connected)
+				abuf = port_build_self_abort_msg(p_ptr, err);
+			port_unlock(p_ptr);
+		}
+		net_route_msg(abuf);
+	}
+
+	/* send rejected message */
+	buf_discard(buf);
+	net_route_msg(rbuf);
+	return data_sz;
+}
+
+int port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
+			 struct iovec const *msg_sect, u32 num_sect,
+			 int err)
+{
+	struct sk_buff *buf;
+	int res;
+
+	res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE, 
+			!p_ptr->user_port, &buf);
+	if (!buf)
+		return res;
+
+	return tipc_reject_msg(buf, err);
+}
+
+static void port_timeout(unsigned long ref)
+{
+	struct port *p_ptr = port_lock(ref);
+	struct sk_buff *buf = 0;
+
+	if (!p_ptr || !p_ptr->publ.connected)
+		return;
+
+	/* Last probe answered ? */
+	if (p_ptr->probing_state == PROBING) {
+		buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
+	} else {
+		buf = port_build_proto_msg(port_peerport(p_ptr),
+					   port_peernode(p_ptr),
+					   p_ptr->publ.ref,
+					   tipc_own_addr,
+					   CONN_MANAGER,
+					   CONN_PROBE,
+					   TIPC_OK, 
+					   port_out_seqno(p_ptr),
+					   0);
+		port_incr_out_seqno(p_ptr);
+		p_ptr->probing_state = PROBING;
+		k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
+	}
+	port_unlock(p_ptr);
+	net_route_msg(buf);
+}
+
+
+static void port_handle_node_down(unsigned long ref)
+{
+	struct port *p_ptr = port_lock(ref);
+	struct sk_buff* buf = 0;
+
+	if (!p_ptr)
+		return;
+	buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
+	port_unlock(p_ptr);
+	net_route_msg(buf);
+}
+
+
+static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
+{
+	u32 imp = msg_importance(&p_ptr->publ.phdr);
+
+	if (!p_ptr->publ.connected)
+		return 0;
+	if (imp < TIPC_CRITICAL_IMPORTANCE)
+		imp++;
+	return port_build_proto_msg(p_ptr->publ.ref,
+				    tipc_own_addr,
+				    port_peerport(p_ptr),
+				    port_peernode(p_ptr),
+				    imp,
+				    TIPC_CONN_MSG,
+				    err, 
+				    p_ptr->last_in_seqno + 1,
+				    0);
+}
+
+
+static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
+{
+	u32 imp = msg_importance(&p_ptr->publ.phdr);
+
+	if (!p_ptr->publ.connected)
+		return 0;
+	if (imp < TIPC_CRITICAL_IMPORTANCE)
+		imp++;
+	return port_build_proto_msg(port_peerport(p_ptr),
+				    port_peernode(p_ptr),
+				    p_ptr->publ.ref,
+				    tipc_own_addr,
+				    imp,
+				    TIPC_CONN_MSG,
+				    err, 
+				    port_out_seqno(p_ptr),
+				    0);
+}
+
+void port_recv_proto_msg(struct sk_buff *buf)
+{
+	struct tipc_msg *msg = buf_msg(buf);
+	struct port *p_ptr = port_lock(msg_destport(msg));
+	u32 err = TIPC_OK;
+	struct sk_buff *r_buf = 0;
+	struct sk_buff *abort_buf = 0;
+
+	msg_dbg(msg, "PORT<RECV<:");
+
+	if (!p_ptr) {
+		err = TIPC_ERR_NO_PORT;
+	} else if (p_ptr->publ.connected) {
+		if (port_peernode(p_ptr) != msg_orignode(msg))
+			err = TIPC_ERR_NO_PORT;
+		if (port_peerport(p_ptr) != msg_origport(msg))
+			err = TIPC_ERR_NO_PORT;
+		if (!err && msg_routed(msg)) {
+			u32 seqno = msg_transp_seqno(msg);
+			u32 myno =  ++p_ptr->last_in_seqno;
+			if (seqno != myno) {
+				err = TIPC_ERR_NO_PORT;
+				abort_buf = port_build_self_abort_msg(p_ptr, err);
+			}
+		}
+		if (msg_type(msg) == CONN_ACK) {
+			int wakeup = port_congested(p_ptr) && 
+				     p_ptr->publ.congested &&
+				     p_ptr->wakeup;
+			p_ptr->acked += msg_msgcnt(msg);
+			if (port_congested(p_ptr))
+				goto exit;
+			p_ptr->publ.congested = 0;
+			if (!wakeup)
+				goto exit;
+			p_ptr->wakeup(&p_ptr->publ);
+			goto exit;
+		}
+	} else if (p_ptr->publ.published) {
+		err = TIPC_ERR_NO_PORT;
+	}
+	if (err) {
+		r_buf = port_build_proto_msg(msg_origport(msg),
+					     msg_orignode(msg), 
+					     msg_destport(msg), 
+					     tipc_own_addr,
+					     DATA_HIGH,
+					     TIPC_CONN_MSG,
+					     err,
+					     0,
+					     0);
+		goto exit;
+	}
+
+	/* All is fine */
+	if (msg_type(msg) == CONN_PROBE) {
+		r_buf = port_build_proto_msg(msg_origport(msg), 
+					     msg_orignode(msg), 
+					     msg_destport(msg), 
+					     tipc_own_addr, 
+					     CONN_MANAGER,
+					     CONN_PROBE_REPLY,
+					     TIPC_OK,
+					     port_out_seqno(p_ptr),
+					     0);
+	}
+	p_ptr->probing_state = CONFIRMED;
+	port_incr_out_seqno(p_ptr);
+exit:
+	if (p_ptr)
+		port_unlock(p_ptr);
+	net_route_msg(r_buf);
+	net_route_msg(abort_buf);
+	buf_discard(buf);
+}
+
+static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
+{
+        struct publication *publ;
+
+	if (full_id)
+		tipc_printf(buf, "<%u.%u.%u:%u>:", 
+			    tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
+                            tipc_node(tipc_own_addr), p_ptr->publ.ref);
+	else
+		tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
+
+        if (p_ptr->publ.connected) {
+                u32 dport = port_peerport(p_ptr);
+                u32 destnode = port_peernode(p_ptr);
+
+                tipc_printf(buf, " connected to <%u.%u.%u:%u>",
+                            tipc_zone(destnode), tipc_cluster(destnode),
+                            tipc_node(destnode), dport);
+                if (p_ptr->publ.conn_type != 0)
+                        tipc_printf(buf, " via {%u,%u}",
+                                    p_ptr->publ.conn_type,
+                                    p_ptr->publ.conn_instance);
+        }
+        else if (p_ptr->publ.published) {
+                tipc_printf(buf, " bound to");
+                list_for_each_entry(publ, &p_ptr->publications, pport_list) {
+			if (publ->lower == publ->upper)
+				tipc_printf(buf, " {%u,%u}", publ->type,
+					    publ->lower);
+			else
+				tipc_printf(buf, " {%u,%u,%u}", publ->type, 
+					    publ->lower, publ->upper);
+                }
+        }
+        tipc_printf(buf, "\n");
+}
+
+#define MAX_PORT_QUERY 32768
+
+struct sk_buff *port_get_ports(void)
+{
+	struct sk_buff *buf;
+	struct tlv_desc *rep_tlv;
+	struct print_buf pb;
+	struct port *p_ptr;
+	int str_len;
+
+	buf = cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
+	if (!buf)
+		return NULL;
+	rep_tlv = (struct tlv_desc *)buf->data;
+
+	printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
+	spin_lock_bh(&port_list_lock);
+	list_for_each_entry(p_ptr, &ports, port_list) {
+		spin_lock_bh(p_ptr->publ.lock);
+		port_print(p_ptr, &pb, 0);
+		spin_unlock_bh(p_ptr->publ.lock);
+	}
+	spin_unlock_bh(&port_list_lock);
+	str_len = printbuf_validate(&pb);
+
+	skb_put(buf, TLV_SPACE(str_len));
+	TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
+
+	return buf;
+}
+
+#if 0
+
+#define MAX_PORT_STATS 2000
+
+struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space)
+{
+	u32 ref;
+	struct port *p_ptr;
+	struct sk_buff *buf;
+	struct tlv_desc *rep_tlv;
+	struct print_buf pb;
+	int str_len;
+
+	if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_PORT_REF))
+		return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
+
+	ref = *(u32 *)TLV_DATA(req_tlv_area);
+	ref = ntohl(ref);
+
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return cfg_reply_error_string("port not found");
+
+	buf = cfg_reply_alloc(TLV_SPACE(MAX_PORT_STATS));
+	if (!buf) {
+		port_unlock(p_ptr);
+		return NULL;
+	}
+	rep_tlv = (struct tlv_desc *)buf->data;
+
+	printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_STATS);
+	port_print(p_ptr, &pb, 1);
+	/* NEED TO FILL IN ADDITIONAL PORT STATISTICS HERE */
+	port_unlock(p_ptr);
+	str_len = printbuf_validate(&pb);
+
+	skb_put(buf, TLV_SPACE(str_len));
+	TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
+
+	return buf;
+}
+
+#endif
+
+void port_reinit(void)
+{
+	struct port *p_ptr;
+	struct tipc_msg *msg;
+
+	spin_lock_bh(&port_list_lock);
+	list_for_each_entry(p_ptr, &ports, port_list) {
+		msg = &p_ptr->publ.phdr;
+		if (msg_orignode(msg) == tipc_own_addr)
+			break;
+		msg_set_orignode(msg, tipc_own_addr);
+	}
+	spin_unlock_bh(&port_list_lock);
+}
+
+
+/*
+ *  port_dispatcher_sigh(): Signal handler for messages destinated
+ *                          to the tipc_port interface.
+ */
+
+static void port_dispatcher_sigh(void *dummy)
+{
+	struct sk_buff *buf;
+
+	spin_lock_bh(&queue_lock);
+	buf = msg_queue_head;
+	msg_queue_head = 0;
+	spin_unlock_bh(&queue_lock);
+
+	while (buf) {
+		struct port *p_ptr;
+		struct user_port *up_ptr;
+		struct tipc_portid orig;
+		struct tipc_name_seq dseq;
+		void *usr_handle;
+		int connected;
+		int published;
+
+		struct sk_buff *next = buf->next;
+		struct tipc_msg *msg = buf_msg(buf);
+		u32 dref = msg_destport(msg);
+		
+		p_ptr = port_lock(dref);
+		if (!p_ptr) {
+			/* Port deleted while msg in queue */
+			tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
+			buf = next;
+			continue;
+		}
+		orig.ref = msg_origport(msg);
+		orig.node = msg_orignode(msg);
+		up_ptr = p_ptr->user_port;
+		usr_handle = up_ptr->usr_handle;
+		connected = p_ptr->publ.connected;
+		published = p_ptr->publ.published;
+
+		if (unlikely(msg_errcode(msg)))
+			goto err;
+
+		switch (msg_type(msg)) {
+		
+		case TIPC_CONN_MSG:{
+				tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
+				u32 peer_port = port_peerport(p_ptr);
+				u32 peer_node = port_peernode(p_ptr);
+
+				spin_unlock_bh(p_ptr->publ.lock);
+				if (unlikely(!connected)) {
+					if (unlikely(published))
+						goto reject;
+					tipc_connect2port(dref,&orig);
+				}
+				if (unlikely(msg_origport(msg) != peer_port))
+					goto reject;
+				if (unlikely(msg_orignode(msg) != peer_node))
+					goto reject;
+				if (unlikely(!cb))
+					goto reject;
+				if (unlikely(++p_ptr->publ.conn_unacked >= 
+					     TIPC_FLOW_CONTROL_WIN))
+					tipc_acknowledge(dref, 
+							 p_ptr->publ.conn_unacked);
+				skb_pull(buf, msg_hdr_sz(msg));
+				cb(usr_handle, dref, &buf, msg_data(msg),
+				   msg_data_sz(msg));
+				break;
+			}
+		case TIPC_DIRECT_MSG:{
+				tipc_msg_event cb = up_ptr->msg_cb;
+
+				spin_unlock_bh(p_ptr->publ.lock);
+				if (unlikely(connected))
+					goto reject;
+				if (unlikely(!cb))
+					goto reject;
+				skb_pull(buf, msg_hdr_sz(msg));
+				cb(usr_handle, dref, &buf, msg_data(msg), 
+				   msg_data_sz(msg), msg_importance(msg),
+				   &orig);
+				break;
+			}
+		case TIPC_NAMED_MSG:{
+				tipc_named_msg_event cb = up_ptr->named_msg_cb;
+
+				spin_unlock_bh(p_ptr->publ.lock);
+				if (unlikely(connected))
+					goto reject;
+				if (unlikely(!cb))
+					goto reject;
+				if (unlikely(!published))
+					goto reject;
+				dseq.type =  msg_nametype(msg);
+				dseq.lower = msg_nameinst(msg);
+				dseq.upper = dseq.lower;
+				skb_pull(buf, msg_hdr_sz(msg));
+				cb(usr_handle, dref, &buf, msg_data(msg), 
+				   msg_data_sz(msg), msg_importance(msg),
+				   &orig, &dseq);
+				break;
+			}
+		}
+		if (buf)
+			buf_discard(buf);
+		buf = next;
+		continue;
+err:
+		switch (msg_type(msg)) {
+		
+		case TIPC_CONN_MSG:{
+				tipc_conn_shutdown_event cb = 
+					up_ptr->conn_err_cb;
+				u32 peer_port = port_peerport(p_ptr);
+				u32 peer_node = port_peernode(p_ptr);
+
+				spin_unlock_bh(p_ptr->publ.lock);
+				if (!connected || !cb)
+					break;
+				if (msg_origport(msg) != peer_port)
+					break;
+				if (msg_orignode(msg) != peer_node)
+					break;
+				tipc_disconnect(dref);
+				skb_pull(buf, msg_hdr_sz(msg));
+				cb(usr_handle, dref, &buf, msg_data(msg),
+				   msg_data_sz(msg), msg_errcode(msg));
+				break;
+			}
+		case TIPC_DIRECT_MSG:{
+				tipc_msg_err_event cb = up_ptr->err_cb;
+
+				spin_unlock_bh(p_ptr->publ.lock);
+				if (connected || !cb)
+					break;
+				skb_pull(buf, msg_hdr_sz(msg));
+				cb(usr_handle, dref, &buf, msg_data(msg),
+				   msg_data_sz(msg), msg_errcode(msg), &orig);
+				break;
+			}
+		case TIPC_NAMED_MSG:{
+				tipc_named_msg_err_event cb = 
+					up_ptr->named_err_cb;
+
+				spin_unlock_bh(p_ptr->publ.lock);
+				if (connected || !cb)
+					break;
+				dseq.type =  msg_nametype(msg);
+				dseq.lower = msg_nameinst(msg);
+				dseq.upper = dseq.lower;
+				skb_pull(buf, msg_hdr_sz(msg));
+				cb(usr_handle, dref, &buf, msg_data(msg), 
+				   msg_data_sz(msg), msg_errcode(msg), &dseq);
+				break;
+			}
+		}
+		if (buf)
+			buf_discard(buf);
+		buf = next;
+		continue;
+reject:
+		tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
+		buf = next;
+	}
+}
+
+/*
+ *  port_dispatcher(): Dispatcher for messages destinated
+ *  to the tipc_port interface. Called with port locked.
+ */
+
+static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
+{
+	buf->next = NULL;
+	spin_lock_bh(&queue_lock);
+	if (msg_queue_head) {
+		msg_queue_tail->next = buf;
+		msg_queue_tail = buf;
+	} else {
+		msg_queue_tail = msg_queue_head = buf;
+		k_signal((Handler)port_dispatcher_sigh, 0);
+	}
+	spin_unlock_bh(&queue_lock);
+	return TIPC_OK;
+}
+
+/* 
+ * Wake up port after congestion: Called with port locked,
+ *                                
+ */
+
+static void port_wakeup_sh(unsigned long ref)
+{
+	struct port *p_ptr;
+	struct user_port *up_ptr;
+	tipc_continue_event cb = 0;
+	void *uh = 0;
+
+	p_ptr = port_lock(ref);
+	if (p_ptr) {
+		up_ptr = p_ptr->user_port;
+		if (up_ptr) {
+			cb = up_ptr->continue_event_cb;
+			uh = up_ptr->usr_handle;
+		}
+		port_unlock(p_ptr);
+	}
+	if (cb)
+		cb(uh, ref);
+}
+
+
+static void port_wakeup(struct tipc_port *p_ptr)
+{
+	k_signal((Handler)port_wakeup_sh, p_ptr->ref);
+}
+
+void tipc_acknowledge(u32 ref, u32 ack)
+{
+	struct port *p_ptr;
+	struct sk_buff *buf = 0;
+
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return;
+	if (p_ptr->publ.connected) {
+		p_ptr->publ.conn_unacked -= ack;
+		buf = port_build_proto_msg(port_peerport(p_ptr),
+					   port_peernode(p_ptr),
+					   ref,
+					   tipc_own_addr,
+					   CONN_MANAGER,
+					   CONN_ACK,
+					   TIPC_OK, 
+					   port_out_seqno(p_ptr),
+					   ack);
+	}
+	port_unlock(p_ptr);
+	net_route_msg(buf);
+}
+
+/*
+ * tipc_createport(): user level call. Will add port to
+ *                    registry if non-zero user_ref.
+ */
+
+int tipc_createport(u32 user_ref, 
+		    void *usr_handle, 
+		    unsigned int importance, 
+		    tipc_msg_err_event error_cb, 
+		    tipc_named_msg_err_event named_error_cb, 
+		    tipc_conn_shutdown_event conn_error_cb, 
+		    tipc_msg_event msg_cb, 
+		    tipc_named_msg_event named_msg_cb, 
+		    tipc_conn_msg_event conn_msg_cb, 
+		    tipc_continue_event continue_event_cb,/* May be zero */
+		    u32 *portref)
+{
+	struct user_port *up_ptr;
+	struct port *p_ptr; 
+	u32 ref;
+
+	up_ptr = (struct user_port *)kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
+	if (up_ptr == NULL) {
+		return -ENOMEM;
+	}
+	ref = tipc_createport_raw(0, port_dispatcher, port_wakeup, importance);
+	p_ptr = port_lock(ref);
+	if (!p_ptr) {
+		kfree(up_ptr);
+		return -ENOMEM;
+	}
+
+	p_ptr->user_port = up_ptr;
+	up_ptr->user_ref = user_ref;
+	up_ptr->usr_handle = usr_handle;
+	up_ptr->ref = p_ptr->publ.ref;
+	up_ptr->err_cb = error_cb;
+	up_ptr->named_err_cb = named_error_cb;
+	up_ptr->conn_err_cb = conn_error_cb;
+	up_ptr->msg_cb = msg_cb;
+	up_ptr->named_msg_cb = named_msg_cb;
+	up_ptr->conn_msg_cb = conn_msg_cb;
+	up_ptr->continue_event_cb = continue_event_cb;
+	INIT_LIST_HEAD(&up_ptr->uport_list);
+	reg_add_port(up_ptr);
+	*portref = p_ptr->publ.ref;
+	dbg(" tipc_createport: %x with ref %u\n", p_ptr, p_ptr->publ.ref);        
+	port_unlock(p_ptr);
+	return TIPC_OK;
+}
+
+int tipc_ownidentity(u32 ref, struct tipc_portid *id)
+{
+	id->ref = ref;
+	id->node = tipc_own_addr;
+	return TIPC_OK;
+}
+
+int tipc_portimportance(u32 ref, unsigned int *importance)
+{
+	struct port *p_ptr;
+	
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return -EINVAL;
+	*importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
+	spin_unlock_bh(p_ptr->publ.lock);
+	return TIPC_OK;
+}
+
+int tipc_set_portimportance(u32 ref, unsigned int imp)
+{
+	struct port *p_ptr;
+
+	if (imp > TIPC_CRITICAL_IMPORTANCE)
+		return -EINVAL;
+
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return -EINVAL;
+	msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
+	spin_unlock_bh(p_ptr->publ.lock);
+	return TIPC_OK;
+}
+
+
+int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
+{
+	struct port *p_ptr;
+	struct publication *publ;
+	u32 key;
+	int res = -EINVAL;
+
+	p_ptr = port_lock(ref);
+	dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
+	    "lower = %u, upper = %u\n",
+	    ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
+	if (!p_ptr)
+		return -EINVAL;
+	if (p_ptr->publ.connected)
+		goto exit;
+	if (seq->lower > seq->upper)
+		goto exit;
+	if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
+		goto exit;
+	key = ref + p_ptr->pub_count + 1;
+	if (key == ref) {
+		res = -EADDRINUSE;
+		goto exit;
+	}
+	publ = nametbl_publish(seq->type, seq->lower, seq->upper,
+			       scope, p_ptr->publ.ref, key);
+	if (publ) {
+		list_add(&publ->pport_list, &p_ptr->publications);
+		p_ptr->pub_count++;
+		p_ptr->publ.published = 1;
+		res = TIPC_OK;
+	}
+exit:
+	port_unlock(p_ptr);
+	return res;
+}
+
+int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
+{
+	struct port *p_ptr;
+	struct publication *publ;
+	struct publication *tpubl;
+	int res = -EINVAL;
+	
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return -EINVAL;
+	if (!p_ptr->publ.published)
+		goto exit;
+	if (!seq) {
+		list_for_each_entry_safe(publ, tpubl, 
+					 &p_ptr->publications, pport_list) {
+			nametbl_withdraw(publ->type, publ->lower, 
+					 publ->ref, publ->key);
+		}
+		res = TIPC_OK;
+	} else {
+		list_for_each_entry_safe(publ, tpubl, 
+					 &p_ptr->publications, pport_list) {
+			if (publ->scope != scope)
+				continue;
+			if (publ->type != seq->type)
+				continue;
+			if (publ->lower != seq->lower)
+				continue;
+			if (publ->upper != seq->upper)
+				break;
+			nametbl_withdraw(publ->type, publ->lower, 
+					 publ->ref, publ->key);
+			res = TIPC_OK;
+			break;
+		}
+	}
+	if (list_empty(&p_ptr->publications))
+		p_ptr->publ.published = 0;
+exit:
+	port_unlock(p_ptr);
+	return res;
+}
+
+int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
+{
+	struct port *p_ptr;
+	struct tipc_msg *msg;
+	int res = -EINVAL;
+
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return -EINVAL;
+	if (p_ptr->publ.published || p_ptr->publ.connected)
+		goto exit;
+	if (!peer->ref)
+		goto exit;
+
+	msg = &p_ptr->publ.phdr;
+	msg_set_destnode(msg, peer->node);
+	msg_set_destport(msg, peer->ref);
+	msg_set_orignode(msg, tipc_own_addr);
+	msg_set_origport(msg, p_ptr->publ.ref);
+	msg_set_transp_seqno(msg, 42);
+	msg_set_type(msg, TIPC_CONN_MSG);
+	if (!may_route(peer->node))
+		msg_set_hdr_sz(msg, SHORT_H_SIZE);
+	else
+		msg_set_hdr_sz(msg, LONG_H_SIZE);
+
+	p_ptr->probing_interval = PROBING_INTERVAL;
+	p_ptr->probing_state = CONFIRMED;
+	p_ptr->publ.connected = 1;
+	k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
+
+	nodesub_subscribe(&p_ptr->subscription,peer->node, (void *)ref,
+			  (net_ev_handler)port_handle_node_down);
+	res = TIPC_OK;
+exit:
+	port_unlock(p_ptr);
+	p_ptr->max_pkt = link_get_max_pkt(peer->node, ref);
+	return res;
+}
+
+/*
+ * tipc_disconnect(): Disconnect port form peer.
+ *                    This is a node local operation.
+ */
+
+int tipc_disconnect(u32 ref)
+{
+	struct port *p_ptr;
+	int res = -ENOTCONN;
+
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return -EINVAL;
+	if (p_ptr->publ.connected) {
+		p_ptr->publ.connected = 0;
+		/* let timer expire on it's own to avoid deadlock! */
+		nodesub_unsubscribe(&p_ptr->subscription);
+		res = TIPC_OK;
+	}
+	port_unlock(p_ptr);
+	return res;
+}
+
+/*
+ * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
+ */
+int tipc_shutdown(u32 ref)
+{
+	struct port *p_ptr;
+	struct sk_buff *buf = 0;
+
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return -EINVAL;
+
+	if (p_ptr->publ.connected) {
+		u32 imp = msg_importance(&p_ptr->publ.phdr);
+		if (imp < TIPC_CRITICAL_IMPORTANCE)
+			imp++;
+		buf = port_build_proto_msg(port_peerport(p_ptr),
+					   port_peernode(p_ptr),
+					   ref,
+					   tipc_own_addr,
+					   imp,
+					   TIPC_CONN_MSG,
+					   TIPC_CONN_SHUTDOWN, 
+					   port_out_seqno(p_ptr),
+					   0);
+	}
+	port_unlock(p_ptr);
+	net_route_msg(buf);
+	return tipc_disconnect(ref);
+}
+
+int tipc_isconnected(u32 ref, int *isconnected)
+{
+	struct port *p_ptr;
+	
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return -EINVAL;
+	*isconnected = p_ptr->publ.connected;
+	port_unlock(p_ptr);
+	return TIPC_OK;
+}
+
+int tipc_peer(u32 ref, struct tipc_portid *peer)
+{
+	struct port *p_ptr;
+	int res;
+	 
+	p_ptr = port_lock(ref);
+	if (!p_ptr)
+		return -EINVAL;
+	if (p_ptr->publ.connected) {
+		peer->ref = port_peerport(p_ptr);
+		peer->node = port_peernode(p_ptr);
+		res = TIPC_OK;
+	} else
+		res = -ENOTCONN;
+	port_unlock(p_ptr);
+	return res;
+}
+
+int tipc_ref_valid(u32 ref)
+{
+	/* Works irrespective of type */
+	return !!ref_deref(ref);
+}
+
+
+/*
+ *  port_recv_sections(): Concatenate and deliver sectioned
+ *                        message for this node.
+ */
+
+int port_recv_sections(struct port *sender, unsigned int num_sect,
+		       struct iovec const *msg_sect)
+{
+	struct sk_buff *buf;
+	int res;
+	 
+	res = msg_build(&sender->publ.phdr, msg_sect, num_sect,
+			MAX_MSG_SIZE, !sender->user_port, &buf);
+	if (likely(buf))
+		port_recv_msg(buf);
+	return res;
+}
+
+/**
+ * tipc_send - send message sections on connection
+ */
+
+int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
+{
+	struct port *p_ptr;
+	u32 destnode;
+	int res;
+
+	p_ptr = port_deref(ref);
+	if (!p_ptr || !p_ptr->publ.connected)
+		return -EINVAL;
+
+	p_ptr->publ.congested = 1;
+	if (!port_congested(p_ptr)) {
+		destnode = port_peernode(p_ptr);
+		if (likely(destnode != tipc_own_addr))
+			res = link_send_sections_fast(p_ptr, msg_sect, num_sect,
+						      destnode);
+		else
+			res = port_recv_sections(p_ptr, num_sect, msg_sect);
+
+		if (likely(res != -ELINKCONG)) {
+			port_incr_out_seqno(p_ptr);
+			p_ptr->publ.congested = 0;
+			p_ptr->sent++;
+			return res;
+		}
+	}
+	if (port_unreliable(p_ptr)) {
+		p_ptr->publ.congested = 0;
+		/* Just calculate msg length and return */
+		return msg_calc_data_size(msg_sect, num_sect);
+	}
+	return -ELINKCONG;
+}
+
+/** 
+ * tipc_send_buf - send message buffer on connection
+ */
+
+int tipc_send_buf(u32 ref, struct sk_buff *buf, unsigned int dsz)
+{
+	struct port *p_ptr;
+	struct tipc_msg *msg;
+	u32 destnode;
+	u32 hsz;
+	u32 sz;
+	u32 res;
+	 
+	p_ptr = port_deref(ref);
+	if (!p_ptr || !p_ptr->publ.connected)
+		return -EINVAL;
+
+	msg = &p_ptr->publ.phdr;
+	hsz = msg_hdr_sz(msg);
+	sz = hsz + dsz;
+	msg_set_size(msg, sz);
+	if (skb_cow(buf, hsz))
+		return -ENOMEM;
+
+	skb_push(buf, hsz);
+	memcpy(buf->data, (unchar *)msg, hsz);
+	destnode = msg_destnode(msg);
+	p_ptr->publ.congested = 1;
+	if (!port_congested(p_ptr)) {
+		if (likely(destnode != tipc_own_addr))
+			res = tipc_send_buf_fast(buf, destnode);
+		else {
+			port_recv_msg(buf);
+			res = sz;
+		}
+		if (likely(res != -ELINKCONG)) {
+			port_incr_out_seqno(p_ptr);
+			p_ptr->sent++;
+			p_ptr->publ.congested = 0;
+			return res;
+		}
+	}
+	if (port_unreliable(p_ptr)) {
+		p_ptr->publ.congested = 0;
+		return dsz;
+	}
+	return -ELINKCONG;
+}
+
+/**
+ * tipc_forward2name - forward message sections to port name
+ */
+
+int tipc_forward2name(u32 ref, 
+		      struct tipc_name const *name, 
+		      u32 domain,
+		      u32 num_sect, 
+		      struct iovec const *msg_sect,
+		      struct tipc_portid const *orig, 
+		      unsigned int importance)
+{
+	struct port *p_ptr;
+	struct tipc_msg *msg;
+	u32 destnode = domain;
+	u32 destport = 0;
+	int res;
+
+	p_ptr = port_deref(ref);
+	if (!p_ptr || p_ptr->publ.connected)
+		return -EINVAL;
+
+	msg = &p_ptr->publ.phdr;
+	msg_set_type(msg, TIPC_NAMED_MSG);
+	msg_set_orignode(msg, orig->node);
+	msg_set_origport(msg, orig->ref);
+	msg_set_hdr_sz(msg, LONG_H_SIZE);
+	msg_set_nametype(msg, name->type);
+	msg_set_nameinst(msg, name->instance);
+	msg_set_lookup_scope(msg, addr_scope(domain));
+	if (importance <= TIPC_CRITICAL_IMPORTANCE)
+		msg_set_importance(msg,importance);
+	destport = nametbl_translate(name->type, name->instance, &destnode);
+	msg_set_destnode(msg, destnode);
+	msg_set_destport(msg, destport);
+
+	if (likely(destport || destnode)) {
+		p_ptr->sent++;
+		if (likely(destnode == tipc_own_addr))
+			return port_recv_sections(p_ptr, num_sect, msg_sect);
+		res = link_send_sections_fast(p_ptr, msg_sect, num_sect, 
+					      destnode);
+		if (likely(res != -ELINKCONG))
+			return res;
+		if (port_unreliable(p_ptr)) {
+			/* Just calculate msg length and return */
+			return msg_calc_data_size(msg_sect, num_sect);
+		}
+		return -ELINKCONG;
+	}
+	return port_reject_sections(p_ptr, msg, msg_sect, num_sect, 
+				    TIPC_ERR_NO_NAME);
+}
+
+/**
+ * tipc_send2name - send message sections to port name
+ */
+
+int tipc_send2name(u32 ref, 
+		   struct tipc_name const *name,
+		   unsigned int domain, 
+		   unsigned int num_sect, 
+		   struct iovec const *msg_sect)
+{
+	struct tipc_portid orig;
+
+	orig.ref = ref;
+	orig.node = tipc_own_addr;
+	return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
+				 TIPC_PORT_IMPORTANCE);
+}
+
+/** 
+ * tipc_forward_buf2name - forward message buffer to port name
+ */
+
+int tipc_forward_buf2name(u32 ref,
+			  struct tipc_name const *name,
+			  u32 domain,
+			  struct sk_buff *buf,
+			  unsigned int dsz,
+			  struct tipc_portid const *orig,
+			  unsigned int importance)
+{
+	struct port *p_ptr;
+	struct tipc_msg *msg;
+	u32 destnode = domain;
+	u32 destport = 0;
+	int res;
+
+	p_ptr = (struct port *)ref_deref(ref);
+	if (!p_ptr || p_ptr->publ.connected)
+		return -EINVAL;
+
+	msg = &p_ptr->publ.phdr;
+	if (importance <= TIPC_CRITICAL_IMPORTANCE)
+		msg_set_importance(msg, importance);
+	msg_set_type(msg, TIPC_NAMED_MSG);
+	msg_set_orignode(msg, orig->node);
+	msg_set_origport(msg, orig->ref);
+	msg_set_nametype(msg, name->type);
+	msg_set_nameinst(msg, name->instance);
+	msg_set_lookup_scope(msg, addr_scope(domain));
+	msg_set_hdr_sz(msg, LONG_H_SIZE);
+	msg_set_size(msg, LONG_H_SIZE + dsz);
+	destport = nametbl_translate(name->type, name->instance, &destnode);
+	msg_set_destnode(msg, destnode);
+	msg_set_destport(msg, destport);
+	msg_dbg(msg, "forw2name ==> ");
+	if (skb_cow(buf, LONG_H_SIZE))
+		return -ENOMEM;
+	skb_push(buf, LONG_H_SIZE);
+	memcpy(buf->data, (unchar *)msg, LONG_H_SIZE);
+	msg_dbg(buf_msg(buf),"PREP:");
+	if (likely(destport || destnode)) {
+		p_ptr->sent++;
+		if (destnode == tipc_own_addr)
+			return port_recv_msg(buf);
+		res = tipc_send_buf_fast(buf, destnode);
+		if (likely(res != -ELINKCONG))
+			return res;
+		if (port_unreliable(p_ptr))
+			return dsz;
+		return -ELINKCONG;
+	}
+	return tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
+}
+
+/** 
+ * tipc_send_buf2name - send message buffer to port name
+ */
+
+int tipc_send_buf2name(u32 ref, 
+		       struct tipc_name const *dest, 
+		       u32 domain,
+		       struct sk_buff *buf, 
+		       unsigned int dsz)
+{
+	struct tipc_portid orig;
+
+	orig.ref = ref;
+	orig.node = tipc_own_addr;
+	return tipc_forward_buf2name(ref, dest, domain, buf, dsz, &orig,
+				     TIPC_PORT_IMPORTANCE);
+}
+
+/** 
+ * tipc_forward2port - forward message sections to port identity
+ */
+
+int tipc_forward2port(u32 ref,
+		      struct tipc_portid const *dest,
+		      unsigned int num_sect, 
+		      struct iovec const *msg_sect,
+		      struct tipc_portid const *orig, 
+		      unsigned int importance)
+{
+	struct port *p_ptr;
+	struct tipc_msg *msg;
+	int res;
+
+	p_ptr = port_deref(ref);
+	if (!p_ptr || p_ptr->publ.connected)
+		return -EINVAL;
+
+	msg = &p_ptr->publ.phdr;
+	msg_set_type(msg, TIPC_DIRECT_MSG);
+	msg_set_orignode(msg, orig->node);
+	msg_set_origport(msg, orig->ref);
+	msg_set_destnode(msg, dest->node);
+	msg_set_destport(msg, dest->ref);
+	msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
+	if (importance <= TIPC_CRITICAL_IMPORTANCE)
+		msg_set_importance(msg, importance);
+	p_ptr->sent++;
+	if (dest->node == tipc_own_addr)
+		return port_recv_sections(p_ptr, num_sect, msg_sect);
+	res = link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
+	if (likely(res != -ELINKCONG))
+		return res;
+	if (port_unreliable(p_ptr)) {
+		/* Just calculate msg length and return */
+		return msg_calc_data_size(msg_sect, num_sect);
+	}
+	return -ELINKCONG;
+}
+
+/** 
+ * tipc_send2port - send message sections to port identity 
+ */
+
+int tipc_send2port(u32 ref, 
+		   struct tipc_portid const *dest,
+		   unsigned int num_sect, 
+		   struct iovec const *msg_sect)
+{
+	struct tipc_portid orig;
+
+	orig.ref = ref;
+	orig.node = tipc_own_addr;
+	return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig, 
+				 TIPC_PORT_IMPORTANCE);
+}
+
+/** 
+ * tipc_forward_buf2port - forward message buffer to port identity
+ */
+int tipc_forward_buf2port(u32 ref,
+			  struct tipc_portid const *dest,
+			  struct sk_buff *buf,
+			  unsigned int dsz,
+			  struct tipc_portid const *orig,
+			  unsigned int importance)
+{
+	struct port *p_ptr;
+	struct tipc_msg *msg;
+	int res;
+
+	p_ptr = (struct port *)ref_deref(ref);
+	if (!p_ptr || p_ptr->publ.connected)
+		return -EINVAL;
+
+	msg = &p_ptr->publ.phdr;
+	msg_set_type(msg, TIPC_DIRECT_MSG);
+	msg_set_orignode(msg, orig->node);
+	msg_set_origport(msg, orig->ref);
+	msg_set_destnode(msg, dest->node);
+	msg_set_destport(msg, dest->ref);
+	msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
+	if (importance <= TIPC_CRITICAL_IMPORTANCE)
+		msg_set_importance(msg, importance);
+	msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
+	if (skb_cow(buf, DIR_MSG_H_SIZE))
+		return -ENOMEM;
+
+	skb_push(buf, DIR_MSG_H_SIZE);
+	memcpy(buf->data, (unchar *)msg, DIR_MSG_H_SIZE);
+	msg_dbg(msg, "buf2port: ");
+	p_ptr->sent++;
+	if (dest->node == tipc_own_addr)
+		return port_recv_msg(buf);
+	res = tipc_send_buf_fast(buf, dest->node);
+	if (likely(res != -ELINKCONG))
+		return res;
+	if (port_unreliable(p_ptr))
+		return dsz;
+	return -ELINKCONG;
+}
+
+/** 
+ * tipc_send_buf2port - send message buffer to port identity
+ */
+
+int tipc_send_buf2port(u32 ref, 
+		       struct tipc_portid const *dest,
+		       struct sk_buff *buf, 
+		       unsigned int dsz)
+{
+	struct tipc_portid orig;
+
+	orig.ref = ref;
+	orig.node = tipc_own_addr;
+	return tipc_forward_buf2port(ref, dest, buf, dsz, &orig, 
+				     TIPC_PORT_IMPORTANCE);
+}
+