port.c 40.9 KB
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/*
 * net/tipc/port.c: TIPC port code
 * 
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 * Copyright (c) 1992-2006, Ericsson AB
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 * Copyright (c) 2004-2005, Wind River Systems
 * All rights reserved.
 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are met:
 *
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 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. 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.
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 *
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 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * 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
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 * 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

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static struct sk_buff *msg_queue_head = NULL;
static struct sk_buff *msg_queue_tail = NULL;
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spinlock_t tipc_port_list_lock = SPIN_LOCK_UNLOCKED;
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static spinlock_t queue_lock = SPIN_LOCK_UNLOCKED;

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static LIST_HEAD(ports);
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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);


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static u32 port_peernode(struct port *p_ptr)
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{
	return msg_destnode(&p_ptr->publ.phdr);
}

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static u32 port_peerport(struct port *p_ptr)
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{
	return msg_destport(&p_ptr->publ.phdr);
}

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static u32 port_out_seqno(struct port *p_ptr)
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{
	return msg_transp_seqno(&p_ptr->publ.phdr);
}

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static void port_incr_out_seqno(struct port *p_ptr)
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{
	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, };
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	struct port *oport = tipc_port_deref(ref);
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	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 */

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	ext_targets = tipc_nametbl_mc_translate(seq->type, seq->lower, seq->upper,
						TIPC_NODE_SCOPE, &dports);
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	/* 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) {
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				tipc_port_list_free(&dports);
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				buf_discard(buf);
				return -ENOMEM;
			}
		}
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		res = tipc_bclink_send_msg(buf);
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		if ((res < 0) && (dports.count != 0)) {
			buf_discard(ibuf);
		}
	} else {
		ibuf = buf;
	}

	if (res >= 0) {
		if (ibuf)
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			tipc_port_recv_mcast(ibuf, &dports);
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	} else {
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		tipc_port_list_free(&dports);
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	}
	return res;
}

/**
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 * tipc_port_recv_mcast - deliver multicast message to all destination ports
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 * 
 * If there is no port list, perform a lookup to create one
 */

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void tipc_port_recv_mcast(struct sk_buff *buf, struct port_list *dp)
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{
	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) {
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		tipc_nametbl_mc_translate(msg_nametype(msg),
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				     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]);
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			tipc_port_recv_msg(buf);
			tipc_port_list_free(dp);
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			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]);
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			tipc_port_recv_msg(b);
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		}
	}
exit:
	buf_discard(buf);
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	tipc_port_list_free(dp);
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}

/**
 * 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));
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	ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
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	if (!ref) {
		warn("Reference Table Exhausted\n");
		kfree(p_ptr);
		return 0;
	}

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	tipc_port_lock(ref);
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	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);
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	p_ptr->congested_link = NULL;
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	p_ptr->max_pkt = MAX_PKT_DEFAULT;
	p_ptr->dispatcher = dispatcher;
	p_ptr->wakeup = wakeup;
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	p_ptr->user_port = NULL;
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	k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
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	spin_lock_bh(&tipc_port_list_lock);
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	INIT_LIST_HEAD(&p_ptr->publications);
	INIT_LIST_HEAD(&p_ptr->port_list);
	list_add_tail(&p_ptr->port_list, &ports);
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	spin_unlock_bh(&tipc_port_list_lock);
	tipc_port_unlock(p_ptr);
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	return ref;
}

int tipc_deleteport(u32 ref)
{
	struct port *p_ptr;
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	struct sk_buff *buf = NULL;
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	tipc_withdraw(ref, 0, NULL);
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	p_ptr = tipc_port_lock(ref);
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	if (!p_ptr) 
		return -EINVAL;

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	tipc_ref_discard(ref);
	tipc_port_unlock(p_ptr);
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	k_cancel_timer(&p_ptr->timer);
	if (p_ptr->publ.connected) {
		buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
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		tipc_nodesub_unsubscribe(&p_ptr->subscription);
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	}
	if (p_ptr->user_port) {
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		tipc_reg_remove_port(p_ptr->user_port);
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		kfree(p_ptr->user_port);
	}

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	spin_lock_bh(&tipc_port_list_lock);
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	list_del(&p_ptr->port_list);
	list_del(&p_ptr->wait_list);
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	spin_unlock_bh(&tipc_port_list_lock);
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	k_term_timer(&p_ptr->timer);
	kfree(p_ptr);
	dbg("Deleted port %u\n", ref);
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	tipc_net_route_msg(buf);
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	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)
{
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	return (struct tipc_port *)tipc_ref_deref(ref);
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}

/**
 * tipc_get_handle - return user handle associated to port 'ref'
 */

void *tipc_get_handle(const u32 ref)
{
	struct port *p_ptr;
	void * handle;

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	p_ptr = tipc_port_lock(ref);
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	if (!p_ptr)
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		return NULL;
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	handle = p_ptr->publ.usr_handle;
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	tipc_port_unlock(p_ptr);
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	return handle;
}

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static int port_unreliable(struct port *p_ptr)
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{
	return msg_src_droppable(&p_ptr->publ.phdr);
}

int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
{
	struct port *p_ptr;
	
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	p_ptr = tipc_port_lock(ref);
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	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;
	
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	p_ptr = tipc_port_lock(ref);
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	if (!p_ptr)
		return -EINVAL;
	msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
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	tipc_port_unlock(p_ptr);
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	return TIPC_OK;
}

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static int port_unreturnable(struct port *p_ptr)
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{
	return msg_dest_droppable(&p_ptr->publ.phdr);
}

int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
{
	struct port *p_ptr;
	
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	p_ptr = tipc_port_lock(ref);
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	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;
	
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	p_ptr = tipc_port_lock(ref);
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	if (!p_ptr)
		return -EINVAL;
	msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
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	tipc_port_unlock(p_ptr);
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	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)) {
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		struct sk_buff *abuf = NULL;
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		struct port *p_ptr = tipc_port_lock(msg_destport(msg));
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		if (p_ptr) {
			if (p_ptr->publ.connected)
				abuf = port_build_self_abort_msg(p_ptr, err);
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			tipc_port_unlock(p_ptr);
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		}
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		tipc_net_route_msg(abuf);
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	}

	/* send rejected message */
	buf_discard(buf);
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	tipc_net_route_msg(rbuf);
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	return data_sz;
}

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int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
			      struct iovec const *msg_sect, u32 num_sect,
			      int err)
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{
	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)
{
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	struct port *p_ptr = tipc_port_lock(ref);
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	struct sk_buff *buf = NULL;
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	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);
	}
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	tipc_port_unlock(p_ptr);
	tipc_net_route_msg(buf);
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}


static void port_handle_node_down(unsigned long ref)
{
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	struct port *p_ptr = tipc_port_lock(ref);
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	struct sk_buff* buf = NULL;
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	if (!p_ptr)
		return;
	buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
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	tipc_port_unlock(p_ptr);
	tipc_net_route_msg(buf);
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}


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)
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		return NULL;
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	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)
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		return NULL;
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	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);
}

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void tipc_port_recv_proto_msg(struct sk_buff *buf)
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{
	struct tipc_msg *msg = buf_msg(buf);
590
	struct port *p_ptr = tipc_port_lock(msg_destport(msg));
P
Per Liden 已提交
591
	u32 err = TIPC_OK;
592 593
	struct sk_buff *r_buf = NULL;
	struct sk_buff *abort_buf = NULL;
P
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594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612

	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) {
613
			int wakeup = tipc_port_congested(p_ptr) && 
P
Per Liden 已提交
614 615 616
				     p_ptr->publ.congested &&
				     p_ptr->wakeup;
			p_ptr->acked += msg_msgcnt(msg);
617
			if (tipc_port_congested(p_ptr))
P
Per Liden 已提交
618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656
				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)
657 658 659
		tipc_port_unlock(p_ptr);
	tipc_net_route_msg(r_buf);
	tipc_net_route_msg(abort_buf);
P
Per Liden 已提交
660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701
	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

702
struct sk_buff *tipc_port_get_ports(void)
P
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703 704 705 706 707 708 709
{
	struct sk_buff *buf;
	struct tlv_desc *rep_tlv;
	struct print_buf pb;
	struct port *p_ptr;
	int str_len;

710
	buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
P
Per Liden 已提交
711 712 713 714
	if (!buf)
		return NULL;
	rep_tlv = (struct tlv_desc *)buf->data;

715 716
	tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
	spin_lock_bh(&tipc_port_list_lock);
P
Per Liden 已提交
717 718 719 720 721
	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);
	}
722 723
	spin_unlock_bh(&tipc_port_list_lock);
	str_len = tipc_printbuf_validate(&pb);
P
Per Liden 已提交
724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749

	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);

750
	p_ptr = tipc_port_lock(ref);
P
Per Liden 已提交
751 752 753
	if (!p_ptr)
		return cfg_reply_error_string("port not found");

754
	buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_STATS));
P
Per Liden 已提交
755
	if (!buf) {
756
		tipc_port_unlock(p_ptr);
P
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757 758 759 760
		return NULL;
	}
	rep_tlv = (struct tlv_desc *)buf->data;

761
	tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_STATS);
P
Per Liden 已提交
762 763
	port_print(p_ptr, &pb, 1);
	/* NEED TO FILL IN ADDITIONAL PORT STATISTICS HERE */
764 765
	tipc_port_unlock(p_ptr);
	str_len = tipc_printbuf_validate(&pb);
P
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766 767 768 769 770 771 772 773 774

	skb_put(buf, TLV_SPACE(str_len));
	TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);

	return buf;
}

#endif

775
void tipc_port_reinit(void)
P
Per Liden 已提交
776 777 778 779
{
	struct port *p_ptr;
	struct tipc_msg *msg;

780
	spin_lock_bh(&tipc_port_list_lock);
P
Per Liden 已提交
781 782 783 784 785 786
	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);
	}
787
	spin_unlock_bh(&tipc_port_list_lock);
P
Per Liden 已提交
788 789 790 791 792 793 794 795 796 797 798 799 800 801
}


/*
 *  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;
802
	msg_queue_head = NULL;
P
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803 804 805 806 807 808 809 810 811 812 813 814 815 816 817
	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);
		
818
		p_ptr = tipc_port_lock(dref);
P
Per Liden 已提交
819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973
		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;
974
		tipc_k_signal((Handler)port_dispatcher_sigh, 0);
P
Per Liden 已提交
975 976 977 978 979 980 981 982 983 984 985 986 987 988
	}
	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;
989 990
	tipc_continue_event cb = NULL;
	void *uh = NULL;
P
Per Liden 已提交
991

992
	p_ptr = tipc_port_lock(ref);
P
Per Liden 已提交
993 994 995 996 997 998
	if (p_ptr) {
		up_ptr = p_ptr->user_port;
		if (up_ptr) {
			cb = up_ptr->continue_event_cb;
			uh = up_ptr->usr_handle;
		}
999
		tipc_port_unlock(p_ptr);
P
Per Liden 已提交
1000 1001 1002 1003 1004 1005 1006 1007
	}
	if (cb)
		cb(uh, ref);
}


static void port_wakeup(struct tipc_port *p_ptr)
{
1008
	tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
P
Per Liden 已提交
1009 1010 1011 1012 1013
}

void tipc_acknowledge(u32 ref, u32 ack)
{
	struct port *p_ptr;
1014
	struct sk_buff *buf = NULL;
P
Per Liden 已提交
1015

1016
	p_ptr = tipc_port_lock(ref);
P
Per Liden 已提交
1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030
	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);
	}
1031 1032
	tipc_port_unlock(p_ptr);
	tipc_net_route_msg(buf);
P
Per Liden 已提交
1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059
}

/*
 * 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;
	}
1060
	ref = tipc_createport_raw(NULL, port_dispatcher, port_wakeup, importance);
1061
	p_ptr = tipc_port_lock(ref);
P
Per Liden 已提交
1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078
	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);
1079
	tipc_reg_add_port(up_ptr);
P
Per Liden 已提交
1080 1081
	*portref = p_ptr->publ.ref;
	dbg(" tipc_createport: %x with ref %u\n", p_ptr, p_ptr->publ.ref);        
1082
	tipc_port_unlock(p_ptr);
P
Per Liden 已提交
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	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;
	
1097
	p_ptr = tipc_port_lock(ref);
P
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1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111
	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;

1112
	p_ptr = tipc_port_lock(ref);
P
Per Liden 已提交
1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127
	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;

1128
	p_ptr = tipc_port_lock(ref);
P
Per Liden 已提交
1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144
	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;
	}
1145 1146
	publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
				    scope, p_ptr->publ.ref, key);
P
Per Liden 已提交
1147 1148 1149 1150 1151 1152 1153
	if (publ) {
		list_add(&publ->pport_list, &p_ptr->publications);
		p_ptr->pub_count++;
		p_ptr->publ.published = 1;
		res = TIPC_OK;
	}
exit:
1154
	tipc_port_unlock(p_ptr);
P
Per Liden 已提交
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	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;
	
1165
	p_ptr = tipc_port_lock(ref);
P
Per Liden 已提交
1166 1167 1168 1169 1170 1171 1172
	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) {
1173 1174
			tipc_nametbl_withdraw(publ->type, publ->lower, 
					      publ->ref, publ->key);
P
Per Liden 已提交
1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187
		}
		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;
1188 1189
			tipc_nametbl_withdraw(publ->type, publ->lower, 
					      publ->ref, publ->key);
P
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1190 1191 1192 1193 1194 1195 1196
			res = TIPC_OK;
			break;
		}
	}
	if (list_empty(&p_ptr->publications))
		p_ptr->publ.published = 0;
exit:
1197
	tipc_port_unlock(p_ptr);
P
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1198 1199 1200 1201 1202 1203 1204 1205 1206
	return res;
}

int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
{
	struct port *p_ptr;
	struct tipc_msg *msg;
	int res = -EINVAL;

1207
	p_ptr = tipc_port_lock(ref);
P
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1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231
	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);

1232
	tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1233
			  (void *)(unsigned long)ref,
P
Per Liden 已提交
1234 1235 1236
			  (net_ev_handler)port_handle_node_down);
	res = TIPC_OK;
exit:
1237 1238
	tipc_port_unlock(p_ptr);
	p_ptr->max_pkt = tipc_link_get_max_pkt(peer->node, ref);
P
Per Liden 已提交
1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251
	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;

1252
	p_ptr = tipc_port_lock(ref);
P
Per Liden 已提交
1253 1254 1255 1256 1257
	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! */
1258
		tipc_nodesub_unsubscribe(&p_ptr->subscription);
P
Per Liden 已提交
1259 1260
		res = TIPC_OK;
	}
1261
	tipc_port_unlock(p_ptr);
P
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1262 1263 1264 1265 1266 1267 1268 1269 1270
	return res;
}

/*
 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
 */
int tipc_shutdown(u32 ref)
{
	struct port *p_ptr;
1271
	struct sk_buff *buf = NULL;
P
Per Liden 已提交
1272

1273
	p_ptr = tipc_port_lock(ref);
P
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1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290
	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);
	}
1291 1292
	tipc_port_unlock(p_ptr);
	tipc_net_route_msg(buf);
P
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1293 1294 1295 1296 1297 1298 1299
	return tipc_disconnect(ref);
}

int tipc_isconnected(u32 ref, int *isconnected)
{
	struct port *p_ptr;
	
1300
	p_ptr = tipc_port_lock(ref);
P
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1301 1302 1303
	if (!p_ptr)
		return -EINVAL;
	*isconnected = p_ptr->publ.connected;
1304
	tipc_port_unlock(p_ptr);
P
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1305 1306 1307 1308 1309 1310 1311 1312
	return TIPC_OK;
}

int tipc_peer(u32 ref, struct tipc_portid *peer)
{
	struct port *p_ptr;
	int res;
	 
1313
	p_ptr = tipc_port_lock(ref);
P
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1314 1315 1316 1317 1318 1319 1320 1321
	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;
1322
	tipc_port_unlock(p_ptr);
P
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1323 1324 1325 1326 1327 1328
	return res;
}

int tipc_ref_valid(u32 ref)
{
	/* Works irrespective of type */
1329
	return !!tipc_ref_deref(ref);
P
Per Liden 已提交
1330 1331 1332 1333
}


/*
1334
 *  tipc_port_recv_sections(): Concatenate and deliver sectioned
P
Per Liden 已提交
1335 1336 1337
 *                        message for this node.
 */

1338
int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
P
Per Liden 已提交
1339 1340 1341 1342 1343 1344 1345 1346
		       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))
1347
		tipc_port_recv_msg(buf);
P
Per Liden 已提交
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	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;

1361
	p_ptr = tipc_port_deref(ref);
P
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1362 1363 1364 1365
	if (!p_ptr || !p_ptr->publ.connected)
		return -EINVAL;

	p_ptr->publ.congested = 1;
1366
	if (!tipc_port_congested(p_ptr)) {
P
Per Liden 已提交
1367 1368
		destnode = port_peernode(p_ptr);
		if (likely(destnode != tipc_own_addr))
1369 1370
			res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
							   destnode);
P
Per Liden 已提交
1371
		else
1372
			res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
P
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1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401

		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;
	 
1402
	p_ptr = tipc_port_deref(ref);
P
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1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416
	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;
1417
	if (!tipc_port_congested(p_ptr)) {
P
Per Liden 已提交
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		if (likely(destnode != tipc_own_addr))
			res = tipc_send_buf_fast(buf, destnode);
		else {
1421
			tipc_port_recv_msg(buf);
P
Per Liden 已提交
1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455
			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;

1456
	p_ptr = tipc_port_deref(ref);
P
Per Liden 已提交
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	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);
1470
	destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
P
Per Liden 已提交
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	msg_set_destnode(msg, destnode);
	msg_set_destport(msg, destport);

	if (likely(destport || destnode)) {
		p_ptr->sent++;
		if (likely(destnode == tipc_own_addr))
1477 1478 1479
			return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
		res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, 
						   destnode);
P
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		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;
	}
1488 1489
	return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect, 
					 TIPC_ERR_NO_NAME);
P
Per Liden 已提交
1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527
}

/**
 * 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;

1528
	p_ptr = (struct port *)tipc_ref_deref(ref);
P
Per Liden 已提交
1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542
	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);
1543
	destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
P
Per Liden 已提交
1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554
	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)
1555
			return tipc_port_recv_msg(buf);
P
Per Liden 已提交
1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598
		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;

1599
	p_ptr = tipc_port_deref(ref);
P
Per Liden 已提交
1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613
	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)
1614 1615
		return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
	res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
P
Per Liden 已提交
1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655
	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;

1656
	p_ptr = (struct port *)tipc_ref_deref(ref);
P
Per Liden 已提交
1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677
	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)
1678
		return tipc_port_recv_msg(buf);
P
Per Liden 已提交
1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703
	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);
}