Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 778 insertions, 0 deletions

diff --git a/net/rxrpc/connection.c b/net/rxrpc/connection.c
new file mode 100644
index 000000000000..61463c74f8cc
--- /dev/null
+++ b/net/rxrpc/connection.c
@@ -0,0 +1,778 @@
+/* connection.c: Rx connection routines
+ *
+ * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <rxrpc/rxrpc.h>
+#include <rxrpc/transport.h>
+#include <rxrpc/peer.h>
+#include <rxrpc/connection.h>
+#include <rxrpc/call.h>
+#include <rxrpc/message.h>
+#include <linux/udp.h>
+#include <linux/ip.h>
+#include <net/sock.h>
+#include <asm/uaccess.h>
+#include "internal.h"
+
+__RXACCT_DECL(atomic_t rxrpc_connection_count);
+
+LIST_HEAD(rxrpc_conns);
+DECLARE_RWSEM(rxrpc_conns_sem);
+unsigned long rxrpc_conn_timeout = 60 * 60;
+
+static void rxrpc_conn_do_timeout(struct rxrpc_connection *conn);
+
+static void __rxrpc_conn_timeout(rxrpc_timer_t *timer)
+{
+	struct rxrpc_connection *conn =
+		list_entry(timer, struct rxrpc_connection, timeout);
+
+	_debug("Rx CONN TIMEOUT [%p{u=%d}]", conn, atomic_read(&conn->usage));
+
+	rxrpc_conn_do_timeout(conn);
+}
+
+static const struct rxrpc_timer_ops rxrpc_conn_timer_ops = {
+	.timed_out	= __rxrpc_conn_timeout,
+};
+
+/*****************************************************************************/
+/*
+ * create a new connection record
+ */
+static inline int __rxrpc_create_connection(struct rxrpc_peer *peer,
+					    struct rxrpc_connection **_conn)
+{
+	struct rxrpc_connection *conn;
+
+	_enter("%p",peer);
+
+	/* allocate and initialise a connection record */
+	conn = kmalloc(sizeof(struct rxrpc_connection), GFP_KERNEL);
+	if (!conn) {
+		_leave(" = -ENOMEM");
+		return -ENOMEM;
+	}
+
+	memset(conn, 0, sizeof(struct rxrpc_connection));
+	atomic_set(&conn->usage, 1);
+
+	INIT_LIST_HEAD(&conn->link);
+	INIT_LIST_HEAD(&conn->id_link);
+	init_waitqueue_head(&conn->chanwait);
+	spin_lock_init(&conn->lock);
+	rxrpc_timer_init(&conn->timeout, &rxrpc_conn_timer_ops);
+
+	do_gettimeofday(&conn->atime);
+	conn->mtu_size = 1024;
+	conn->peer = peer;
+	conn->trans = peer->trans;
+
+	__RXACCT(atomic_inc(&rxrpc_connection_count));
+	*_conn = conn;
+	_leave(" = 0 (%p)", conn);
+
+	return 0;
+} /* end __rxrpc_create_connection() */
+
+/*****************************************************************************/
+/*
+ * create a new connection record for outgoing connections
+ */
+int rxrpc_create_connection(struct rxrpc_transport *trans,
+			    __be16 port,
+			    __be32 addr,
+			    uint16_t service_id,
+			    void *security,
+			    struct rxrpc_connection **_conn)
+{
+	struct rxrpc_connection *candidate, *conn;
+	struct rxrpc_peer *peer;
+	struct list_head *_p;
+	__be32 connid;
+	int ret;
+
+	_enter("%p{%hu},%u,%hu", trans, trans->port, ntohs(port), service_id);
+
+	/* get a peer record */
+	ret = rxrpc_peer_lookup(trans, addr, &peer);
+	if (ret < 0) {
+		_leave(" = %d", ret);
+		return ret;
+	}
+
+	/* allocate and initialise a connection record */
+	ret = __rxrpc_create_connection(peer, &candidate);
+	if (ret < 0) {
+		rxrpc_put_peer(peer);
+		_leave(" = %d", ret);
+		return ret;
+	}
+
+	/* fill in the specific bits */
+	candidate->addr.sin_family	= AF_INET;
+	candidate->addr.sin_port	= port;
+	candidate->addr.sin_addr.s_addr	= addr;
+
+	candidate->in_epoch		= rxrpc_epoch;
+	candidate->out_epoch		= rxrpc_epoch;
+	candidate->in_clientflag	= 0;
+	candidate->out_clientflag	= RXRPC_CLIENT_INITIATED;
+	candidate->service_id		= htons(service_id);
+
+	/* invent a unique connection ID */
+	write_lock(&peer->conn_idlock);
+
+ try_next_id:
+	connid = htonl(peer->conn_idcounter & RXRPC_CIDMASK);
+	peer->conn_idcounter += RXRPC_MAXCALLS;
+
+	list_for_each(_p, &peer->conn_idlist) {
+		conn = list_entry(_p, struct rxrpc_connection, id_link);
+		if (connid == conn->conn_id)
+			goto try_next_id;
+		if (connid > conn->conn_id)
+			break;
+	}
+
+	_debug("selected candidate conn ID %x.%u",
+	       ntohl(peer->addr.s_addr), ntohl(connid));
+
+	candidate->conn_id = connid;
+	list_add_tail(&candidate->id_link, _p);
+
+	write_unlock(&peer->conn_idlock);
+
+	/* attach to peer */
+	candidate->peer = peer;
+
+	write_lock(&peer->conn_lock);
+
+	/* search the peer's transport graveyard list */
+	spin_lock(&peer->conn_gylock);
+	list_for_each(_p, &peer->conn_graveyard) {
+		conn = list_entry(_p, struct rxrpc_connection, link);
+		if (conn->addr.sin_port	== candidate->addr.sin_port	&&
+		    conn->security_ix	== candidate->security_ix	&&
+		    conn->service_id	== candidate->service_id	&& 
+		    conn->in_clientflag	== 0)
+			goto found_in_graveyard;
+	}
+	spin_unlock(&peer->conn_gylock);
+
+	/* pick the new candidate */
+	_debug("created connection: {%08x} [out]", ntohl(candidate->conn_id));
+	atomic_inc(&peer->conn_count);
+	conn = candidate;
+	candidate = NULL;
+
+ make_active:
+	list_add_tail(&conn->link, &peer->conn_active);
+	write_unlock(&peer->conn_lock);
+
+	if (candidate) {
+		write_lock(&peer->conn_idlock);
+		list_del(&candidate->id_link);
+		write_unlock(&peer->conn_idlock);
+
+		__RXACCT(atomic_dec(&rxrpc_connection_count));
+		kfree(candidate);
+	}
+	else {
+		down_write(&rxrpc_conns_sem);
+		list_add_tail(&conn->proc_link, &rxrpc_conns);
+		up_write(&rxrpc_conns_sem);
+	}
+
+	*_conn = conn;
+	_leave(" = 0 (%p)", conn);
+
+	return 0;
+
+	/* handle resurrecting a connection from the graveyard */
+ found_in_graveyard:
+	_debug("resurrecting connection: {%08x} [out]", ntohl(conn->conn_id));
+	rxrpc_get_connection(conn);
+	rxrpc_krxtimod_del_timer(&conn->timeout);
+	list_del_init(&conn->link);
+	spin_unlock(&peer->conn_gylock);
+	goto make_active;
+} /* end rxrpc_create_connection() */
+
+/*****************************************************************************/
+/*
+ * lookup the connection for an incoming packet
+ * - create a new connection record for unrecorded incoming connections
+ */
+int rxrpc_connection_lookup(struct rxrpc_peer *peer,
+			    struct rxrpc_message *msg,
+			    struct rxrpc_connection **_conn)
+{
+	struct rxrpc_connection *conn, *candidate = NULL;
+	struct list_head *_p;
+	int ret, fresh = 0;
+	__be32 x_epoch, x_connid;
+	__be16 x_port, x_servid;
+	__u32 x_secix;
+	u8 x_clflag;
+
+	_enter("%p{{%hu}},%u,%hu",
+	       peer,
+	       peer->trans->port,
+	       ntohs(msg->pkt->h.uh->source),
+	       ntohs(msg->hdr.serviceId));
+
+	x_port		= msg->pkt->h.uh->source;
+	x_epoch		= msg->hdr.epoch;
+	x_clflag	= msg->hdr.flags & RXRPC_CLIENT_INITIATED;
+	x_connid	= htonl(ntohl(msg->hdr.cid) & RXRPC_CIDMASK);
+	x_servid	= msg->hdr.serviceId;
+	x_secix		= msg->hdr.securityIndex;
+
+	/* [common case] search the transport's active list first */
+	read_lock(&peer->conn_lock);
+	list_for_each(_p, &peer->conn_active) {
+		conn = list_entry(_p, struct rxrpc_connection, link);
+		if (conn->addr.sin_port		== x_port	&&
+		    conn->in_epoch		== x_epoch	&&
+		    conn->conn_id		== x_connid	&&
+		    conn->security_ix		== x_secix	&&
+		    conn->service_id		== x_servid	&& 
+		    conn->in_clientflag		== x_clflag)
+			goto found_active;
+	}
+	read_unlock(&peer->conn_lock);
+
+	/* [uncommon case] not active 
+	 * - create a candidate for a new record if an inbound connection
+	 * - only examine the graveyard for an outbound connection
+	 */
+	if (x_clflag) {
+		ret = __rxrpc_create_connection(peer, &candidate);
+		if (ret < 0) {
+			_leave(" = %d", ret);
+			return ret;
+		}
+
+		/* fill in the specifics */
+		candidate->addr.sin_family	= AF_INET;
+		candidate->addr.sin_port	= x_port;
+		candidate->addr.sin_addr.s_addr = msg->pkt->nh.iph->saddr;
+		candidate->in_epoch		= x_epoch;
+		candidate->out_epoch		= x_epoch;
+		candidate->in_clientflag	= RXRPC_CLIENT_INITIATED;
+		candidate->out_clientflag	= 0;
+		candidate->conn_id		= x_connid;
+		candidate->service_id		= x_servid;
+		candidate->security_ix		= x_secix;
+	}
+
+	/* search the active list again, just in case it appeared whilst we
+	 * were busy */
+	write_lock(&peer->conn_lock);
+	list_for_each(_p, &peer->conn_active) {
+		conn = list_entry(_p, struct rxrpc_connection, link);
+		if (conn->addr.sin_port		== x_port	&&
+		    conn->in_epoch		== x_epoch	&&
+		    conn->conn_id		== x_connid	&&
+		    conn->security_ix		== x_secix	&&
+		    conn->service_id		== x_servid	&& 
+		    conn->in_clientflag		== x_clflag)
+			goto found_active_second_chance;
+	}
+
+	/* search the transport's graveyard list */
+	spin_lock(&peer->conn_gylock);
+	list_for_each(_p, &peer->conn_graveyard) {
+		conn = list_entry(_p, struct rxrpc_connection, link);
+		if (conn->addr.sin_port		== x_port	&&
+		    conn->in_epoch		== x_epoch	&&
+		    conn->conn_id		== x_connid	&&
+		    conn->security_ix		== x_secix	&&
+		    conn->service_id		== x_servid	&& 
+		    conn->in_clientflag		== x_clflag)
+			goto found_in_graveyard;
+	}
+	spin_unlock(&peer->conn_gylock);
+
+	/* outbound connections aren't created here */
+	if (!x_clflag) {
+		write_unlock(&peer->conn_lock);
+		_leave(" = -ENOENT");
+		return -ENOENT;
+	}
+
+	/* we can now add the new candidate to the list */
+	_debug("created connection: {%08x} [in]", ntohl(candidate->conn_id));
+	rxrpc_get_peer(peer);
+	conn = candidate;
+	candidate = NULL;
+	atomic_inc(&peer->conn_count);
+	fresh = 1;
+
+ make_active:
+	list_add_tail(&conn->link, &peer->conn_active);
+
+ success_uwfree:
+	write_unlock(&peer->conn_lock);
+
+	if (candidate) {
+		write_lock(&peer->conn_idlock);
+		list_del(&candidate->id_link);
+		write_unlock(&peer->conn_idlock);
+
+		__RXACCT(atomic_dec(&rxrpc_connection_count));
+		kfree(candidate);
+	}
+
+	if (fresh) {
+		down_write(&rxrpc_conns_sem);
+		list_add_tail(&conn->proc_link, &rxrpc_conns);
+		up_write(&rxrpc_conns_sem);
+	}
+
+ success:
+	*_conn = conn;
+	_leave(" = 0 (%p)", conn);
+	return 0;
+
+	/* handle the connection being found in the active list straight off */
+ found_active:
+	rxrpc_get_connection(conn);
+	read_unlock(&peer->conn_lock);
+	goto success;
+
+	/* handle resurrecting a connection from the graveyard */
+ found_in_graveyard:
+	_debug("resurrecting connection: {%08x} [in]", ntohl(conn->conn_id));
+	rxrpc_get_peer(peer);
+	rxrpc_get_connection(conn);
+	rxrpc_krxtimod_del_timer(&conn->timeout);
+	list_del_init(&conn->link);
+	spin_unlock(&peer->conn_gylock);
+	goto make_active;
+
+	/* handle finding the connection on the second time through the active
+	 * list */
+ found_active_second_chance:
+	rxrpc_get_connection(conn);
+	goto success_uwfree;
+
+} /* end rxrpc_connection_lookup() */
+
+/*****************************************************************************/
+/*
+ * finish using a connection record
+ * - it will be transferred to the peer's connection graveyard when refcount
+ *   reaches 0
+ */
+void rxrpc_put_connection(struct rxrpc_connection *conn)
+{
+	struct rxrpc_peer *peer;
+
+	if (!conn)
+		return;
+
+	_enter("%p{u=%d p=%hu}",
+	       conn, atomic_read(&conn->usage), ntohs(conn->addr.sin_port));
+
+	peer = conn->peer;
+	spin_lock(&peer->conn_gylock);
+
+	/* sanity check */
+	if (atomic_read(&conn->usage) <= 0)
+		BUG();
+
+	if (likely(!atomic_dec_and_test(&conn->usage))) {
+		spin_unlock(&peer->conn_gylock);
+		_leave("");
+		return;
+	}
+
+	/* move to graveyard queue */
+	_debug("burying connection: {%08x}", ntohl(conn->conn_id));
+	list_del(&conn->link);
+	list_add_tail(&conn->link, &peer->conn_graveyard);
+
+	rxrpc_krxtimod_add_timer(&conn->timeout, rxrpc_conn_timeout * HZ);
+
+	spin_unlock(&peer->conn_gylock);
+
+	rxrpc_put_peer(conn->peer);
+
+	_leave(" [killed]");
+} /* end rxrpc_put_connection() */
+
+/*****************************************************************************/
+/*
+ * free a connection record
+ */
+static void rxrpc_conn_do_timeout(struct rxrpc_connection *conn)
+{
+	struct rxrpc_peer *peer;
+
+	_enter("%p{u=%d p=%hu}",
+	       conn, atomic_read(&conn->usage), ntohs(conn->addr.sin_port));
+
+	peer = conn->peer;
+
+	if (atomic_read(&conn->usage) < 0)
+		BUG();
+
+	/* remove from graveyard if still dead */
+	spin_lock(&peer->conn_gylock);
+	if (atomic_read(&conn->usage) == 0) {
+		list_del_init(&conn->link);
+	}
+	else {
+		conn = NULL;
+	}
+	spin_unlock(&peer->conn_gylock);
+
+	if (!conn) {
+		_leave("");
+		return; /* resurrected */
+	}
+
+	_debug("--- Destroying Connection %p{%08x} ---",
+	       conn, ntohl(conn->conn_id));
+
+	down_write(&rxrpc_conns_sem);
+	list_del(&conn->proc_link);
+	up_write(&rxrpc_conns_sem);
+
+	write_lock(&peer->conn_idlock);
+	list_del(&conn->id_link);
+	write_unlock(&peer->conn_idlock);
+
+	__RXACCT(atomic_dec(&rxrpc_connection_count));
+	kfree(conn);
+
+	/* if the graveyard is now empty, wake up anyone waiting for that */
+	if (atomic_dec_and_test(&peer->conn_count))
+		wake_up(&peer->conn_gy_waitq);
+
+	_leave(" [destroyed]");
+} /* end rxrpc_conn_do_timeout() */
+
+/*****************************************************************************/
+/*
+ * clear all connection records from a peer endpoint
+ */
+void rxrpc_conn_clearall(struct rxrpc_peer *peer)
+{
+	DECLARE_WAITQUEUE(myself, current);
+
+	struct rxrpc_connection *conn;
+	int err;
+
+	_enter("%p", peer);
+
+	/* there shouldn't be any active conns remaining */
+	if (!list_empty(&peer->conn_active))
+		BUG();
+
+	/* manually timeout all conns in the graveyard */
+	spin_lock(&peer->conn_gylock);
+	while (!list_empty(&peer->conn_graveyard)) {
+		conn = list_entry(peer->conn_graveyard.next,
+				  struct rxrpc_connection, link);
+		err = rxrpc_krxtimod_del_timer(&conn->timeout);
+		spin_unlock(&peer->conn_gylock);
+
+		if (err == 0)
+			rxrpc_conn_do_timeout(conn);
+
+		spin_lock(&peer->conn_gylock);
+	}
+	spin_unlock(&peer->conn_gylock);
+
+	/* wait for the the conn graveyard to be completely cleared */
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	add_wait_queue(&peer->conn_gy_waitq, &myself);
+
+	while (atomic_read(&peer->conn_count) != 0) {
+		schedule();
+		set_current_state(TASK_UNINTERRUPTIBLE);
+	}
+
+	remove_wait_queue(&peer->conn_gy_waitq, &myself);
+	set_current_state(TASK_RUNNING);
+
+	_leave("");
+} /* end rxrpc_conn_clearall() */
+
+/*****************************************************************************/
+/*
+ * allocate and prepare a message for sending out through the transport
+ * endpoint
+ */
+int rxrpc_conn_newmsg(struct rxrpc_connection *conn,
+		      struct rxrpc_call *call,
+		      uint8_t type,
+		      int dcount,
+		      struct kvec diov[],
+		      int alloc_flags,
+		      struct rxrpc_message **_msg)
+{
+	struct rxrpc_message *msg;
+	int loop;
+
+	_enter("%p{%d},%p,%u", conn, ntohs(conn->addr.sin_port), call, type);
+
+	if (dcount > 3) {
+		_leave(" = -EINVAL");
+		return -EINVAL;
+	}
+
+	msg = kmalloc(sizeof(struct rxrpc_message), alloc_flags);
+	if (!msg) {
+		_leave(" = -ENOMEM");
+		return -ENOMEM;
+	}
+
+	memset(msg, 0, sizeof(*msg));
+	atomic_set(&msg->usage, 1);
+
+	INIT_LIST_HEAD(&msg->link);
+
+	msg->state = RXRPC_MSG_PREPARED;
+
+	msg->hdr.epoch		= conn->out_epoch;
+	msg->hdr.cid		= conn->conn_id | (call ? call->chan_ix : 0);
+	msg->hdr.callNumber	= call ? call->call_id : 0;
+	msg->hdr.type		= type;
+	msg->hdr.flags		= conn->out_clientflag;
+	msg->hdr.securityIndex	= conn->security_ix;
+	msg->hdr.serviceId	= conn->service_id;
+
+	/* generate sequence numbers for data packets */
+	if (call) {
+		switch (type) {
+		case RXRPC_PACKET_TYPE_DATA:
+			msg->seq = ++call->snd_seq_count;
+			msg->hdr.seq = htonl(msg->seq);
+			break;
+		case RXRPC_PACKET_TYPE_ACK:
+			/* ACK sequence numbers are complicated. The following
+			 * may be wrong:
+			 * - jumbo packet ACKs should have a seq number
+			 * - normal ACKs should not
+			 */
+		default:
+			break;
+		}
+	}
+
+	msg->dcount = dcount + 1;
+	msg->dsize = sizeof(msg->hdr);
+	msg->data[0].iov_len = sizeof(msg->hdr);
+	msg->data[0].iov_base = &msg->hdr;
+
+	for (loop=0; loop < dcount; loop++) {
+		msg->dsize += diov[loop].iov_len;
+		msg->data[loop+1].iov_len  = diov[loop].iov_len;
+		msg->data[loop+1].iov_base = diov[loop].iov_base;
+	}
+
+	__RXACCT(atomic_inc(&rxrpc_message_count));
+	*_msg = msg;
+	_leave(" = 0 (%p) #%d", msg, atomic_read(&rxrpc_message_count));
+	return 0;
+} /* end rxrpc_conn_newmsg() */
+
+/*****************************************************************************/
+/*
+ * free a message
+ */
+void __rxrpc_put_message(struct rxrpc_message *msg)
+{
+	int loop;
+
+	_enter("%p #%d", msg, atomic_read(&rxrpc_message_count));
+
+	if (msg->pkt)
+		kfree_skb(msg->pkt);
+	rxrpc_put_connection(msg->conn);
+
+	for (loop = 0; loop < 8; loop++)
+		if (test_bit(loop, &msg->dfree))
+			kfree(msg->data[loop].iov_base);
+
+	__RXACCT(atomic_dec(&rxrpc_message_count));
+	kfree(msg);
+
+	_leave("");
+} /* end __rxrpc_put_message() */
+
+/*****************************************************************************/
+/*
+ * send a message out through the transport endpoint
+ */
+int rxrpc_conn_sendmsg(struct rxrpc_connection *conn,
+		       struct rxrpc_message *msg)
+{
+	struct msghdr msghdr;
+	int ret;
+
+	_enter("%p{%d}", conn, ntohs(conn->addr.sin_port));
+
+	/* fill in some fields in the header */
+	spin_lock(&conn->lock);
+	msg->hdr.serial = htonl(++conn->serial_counter);
+	msg->rttdone = 0;
+	spin_unlock(&conn->lock);
+
+	/* set up the message to be transmitted */
+	msghdr.msg_name		= &conn->addr;
+	msghdr.msg_namelen	= sizeof(conn->addr);
+	msghdr.msg_control	= NULL;
+	msghdr.msg_controllen	= 0;
+	msghdr.msg_flags	= MSG_CONFIRM | MSG_DONTWAIT;
+
+	_net("Sending message type %d of %Zd bytes to %08x:%d",
+	     msg->hdr.type,
+	     msg->dsize,
+	     ntohl(conn->addr.sin_addr.s_addr),
+	     ntohs(conn->addr.sin_port));
+
+	/* send the message */
+	ret = kernel_sendmsg(conn->trans->socket, &msghdr,
+			     msg->data, msg->dcount, msg->dsize);
+	if (ret < 0) {
+		msg->state = RXRPC_MSG_ERROR;
+	} else {
+		msg->state = RXRPC_MSG_SENT;
+		ret = 0;
+
+		spin_lock(&conn->lock);
+		do_gettimeofday(&conn->atime);
+		msg->stamp = conn->atime;
+		spin_unlock(&conn->lock);
+	}
+
+	_leave(" = %d", ret);
+
+	return ret;
+} /* end rxrpc_conn_sendmsg() */
+
+/*****************************************************************************/
+/*
+ * deal with a subsequent call packet
+ */
+int rxrpc_conn_receive_call_packet(struct rxrpc_connection *conn,
+				   struct rxrpc_call *call,
+				   struct rxrpc_message *msg)
+{
+	struct rxrpc_message *pmsg;
+	struct list_head *_p;
+	unsigned cix, seq;
+	int ret = 0;
+
+	_enter("%p,%p,%p", conn, call, msg);
+
+	if (!call) {
+		cix = ntohl(msg->hdr.cid) & RXRPC_CHANNELMASK;
+
+		spin_lock(&conn->lock);
+		call = conn->channels[cix];
+
+		if (!call || call->call_id != msg->hdr.callNumber) {
+			spin_unlock(&conn->lock);
+			rxrpc_trans_immediate_abort(conn->trans, msg, -ENOENT);
+			goto out;
+		}
+		else {
+			rxrpc_get_call(call);
+			spin_unlock(&conn->lock);
+		}
+	}
+	else {
+		rxrpc_get_call(call);
+	}
+
+	_proto("Received packet %%%u [%u] on call %hu:%u:%u",
+	       ntohl(msg->hdr.serial),
+	       ntohl(msg->hdr.seq),
+	       ntohs(msg->hdr.serviceId),
+	       ntohl(conn->conn_id),
+	       ntohl(call->call_id));
+
+	call->pkt_rcv_count++;
+
+	if (msg->pkt->dst && msg->pkt->dst->dev)
+		conn->peer->if_mtu =
+			msg->pkt->dst->dev->mtu -
+			msg->pkt->dst->dev->hard_header_len;
+
+	/* queue on the call in seq order */
+	rxrpc_get_message(msg);
+	seq = msg->seq;
+
+	spin_lock(&call->lock);
+	list_for_each(_p, &call->rcv_receiveq) {
+		pmsg = list_entry(_p, struct rxrpc_message, link);
+		if (pmsg->seq > seq)
+			break;
+	}
+	list_add_tail(&msg->link, _p);
+
+	/* reset the activity timeout */
+	call->flags |= RXRPC_CALL_RCV_PKT;
+	mod_timer(&call->rcv_timeout,jiffies + rxrpc_call_rcv_timeout * HZ);
+
+	spin_unlock(&call->lock);
+
+	rxrpc_krxiod_queue_call(call);
+
+	rxrpc_put_call(call);
+ out:
+	_leave(" = %d", ret);
+	return ret;
+} /* end rxrpc_conn_receive_call_packet() */
+
+/*****************************************************************************/
+/*
+ * handle an ICMP error being applied to a connection
+ */
+void rxrpc_conn_handle_error(struct rxrpc_connection *conn,
+			     int local, int errno)
+{
+	struct rxrpc_call *calls[4];
+	int loop;
+
+	_enter("%p{%d},%d", conn, ntohs(conn->addr.sin_port), errno);
+
+	/* get a ref to all my calls in one go */
+	memset(calls, 0, sizeof(calls));
+	spin_lock(&conn->lock);
+
+	for (loop = 3; loop >= 0; loop--) {
+		if (conn->channels[loop]) {
+			calls[loop] = conn->channels[loop];
+			rxrpc_get_call(calls[loop]);
+		}
+	}
+
+	spin_unlock(&conn->lock);
+
+	/* now kick them all */
+	for (loop = 3; loop >= 0; loop--) {
+		if (calls[loop]) {
+			rxrpc_call_handle_error(calls[loop], local, errno);
+			rxrpc_put_call(calls[loop]);
+		}
+	}
+
+	_leave("");
+} /* end rxrpc_conn_handle_error() */