1 /* transport.c: Rx Transport routines
3 * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #include <linux/sched.h>
13 #include <linux/slab.h>
14 #include <linux/module.h>
15 #include <rxrpc/transport.h>
16 #include <rxrpc/peer.h>
17 #include <rxrpc/connection.h>
18 #include <rxrpc/call.h>
19 #include <rxrpc/message.h>
20 #include <rxrpc/krxiod.h>
21 #include <rxrpc/krxsecd.h>
22 #include <linux/udp.h>
24 #include <linux/in6.h>
25 #include <linux/icmp.h>
26 #include <linux/skbuff.h>
29 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
30 #include <linux/ipv6.h> /* this should _really_ be in errqueue.h.. */
32 #include <linux/errqueue.h>
33 #include <asm/uaccess.h>
37 struct cmsghdr cmsg
; /* control message header */
38 struct sock_extended_err ee
; /* extended error information */
39 struct sockaddr_in icmp_src
; /* ICMP packet source address */
42 static DEFINE_SPINLOCK(rxrpc_transports_lock
);
43 static struct list_head rxrpc_transports
= LIST_HEAD_INIT(rxrpc_transports
);
45 __RXACCT_DECL(atomic_t rxrpc_transport_count
);
46 LIST_HEAD(rxrpc_proc_transports
);
47 DECLARE_RWSEM(rxrpc_proc_transports_sem
);
49 static void rxrpc_data_ready(struct sock
*sk
, int count
);
50 static void rxrpc_error_report(struct sock
*sk
);
51 static int rxrpc_trans_receive_new_call(struct rxrpc_transport
*trans
,
52 struct list_head
*msgq
);
53 static void rxrpc_trans_receive_error_report(struct rxrpc_transport
*trans
);
55 /*****************************************************************************/
57 * create a new transport endpoint using the specified UDP port
59 int rxrpc_create_transport(unsigned short port
,
60 struct rxrpc_transport
**_trans
)
62 struct rxrpc_transport
*trans
;
63 struct sockaddr_in sin
;
70 trans
= kzalloc(sizeof(struct rxrpc_transport
), GFP_KERNEL
);
74 atomic_set(&trans
->usage
, 1);
75 INIT_LIST_HEAD(&trans
->services
);
76 INIT_LIST_HEAD(&trans
->link
);
77 INIT_LIST_HEAD(&trans
->krxiodq_link
);
78 spin_lock_init(&trans
->lock
);
79 INIT_LIST_HEAD(&trans
->peer_active
);
80 INIT_LIST_HEAD(&trans
->peer_graveyard
);
81 spin_lock_init(&trans
->peer_gylock
);
82 init_waitqueue_head(&trans
->peer_gy_waitq
);
83 rwlock_init(&trans
->peer_lock
);
84 atomic_set(&trans
->peer_count
, 0);
87 /* create a UDP socket to be my actual transport endpoint */
88 ret
= sock_create_kern(PF_INET
, SOCK_DGRAM
, IPPROTO_UDP
, &trans
->socket
);
92 /* use the specified port */
94 memset(&sin
, 0, sizeof(sin
));
95 sin
.sin_family
= AF_INET
;
96 sin
.sin_port
= htons(port
);
97 ret
= trans
->socket
->ops
->bind(trans
->socket
,
98 (struct sockaddr
*) &sin
,
107 ret
= trans
->socket
->ops
->setsockopt(trans
->socket
, SOL_IP
, IP_RECVERR
,
108 (char *) &opt
, sizeof(opt
));
111 spin_lock(&rxrpc_transports_lock
);
112 list_add(&trans
->link
, &rxrpc_transports
);
113 spin_unlock(&rxrpc_transports_lock
);
115 /* set the socket up */
116 sock
= trans
->socket
->sk
;
117 sock
->sk_user_data
= trans
;
118 sock
->sk_data_ready
= rxrpc_data_ready
;
119 sock
->sk_error_report
= rxrpc_error_report
;
121 down_write(&rxrpc_proc_transports_sem
);
122 list_add_tail(&trans
->proc_link
, &rxrpc_proc_transports
);
123 up_write(&rxrpc_proc_transports_sem
);
125 __RXACCT(atomic_inc(&rxrpc_transport_count
));
128 _leave(" = 0 (%p)", trans
);
132 /* finish cleaning up the transport (not really needed here, but...) */
134 trans
->socket
->ops
->shutdown(trans
->socket
, 2);
136 /* close the socket */
138 trans
->socket
->sk
->sk_user_data
= NULL
;
139 sock_release(trans
->socket
);
140 trans
->socket
= NULL
;
146 _leave(" = %d", ret
);
148 } /* end rxrpc_create_transport() */
150 /*****************************************************************************/
152 * destroy a transport endpoint
154 void rxrpc_put_transport(struct rxrpc_transport
*trans
)
156 _enter("%p{u=%d p=%hu}",
157 trans
, atomic_read(&trans
->usage
), trans
->port
);
159 BUG_ON(atomic_read(&trans
->usage
) <= 0);
161 /* to prevent a race, the decrement and the dequeue must be
162 * effectively atomic */
163 spin_lock(&rxrpc_transports_lock
);
164 if (likely(!atomic_dec_and_test(&trans
->usage
))) {
165 spin_unlock(&rxrpc_transports_lock
);
170 list_del(&trans
->link
);
171 spin_unlock(&rxrpc_transports_lock
);
173 /* finish cleaning up the transport */
175 trans
->socket
->ops
->shutdown(trans
->socket
, 2);
177 rxrpc_krxsecd_clear_transport(trans
);
178 rxrpc_krxiod_dequeue_transport(trans
);
180 /* discard all peer information */
181 rxrpc_peer_clearall(trans
);
183 down_write(&rxrpc_proc_transports_sem
);
184 list_del(&trans
->proc_link
);
185 up_write(&rxrpc_proc_transports_sem
);
186 __RXACCT(atomic_dec(&rxrpc_transport_count
));
188 /* close the socket */
190 trans
->socket
->sk
->sk_user_data
= NULL
;
191 sock_release(trans
->socket
);
192 trans
->socket
= NULL
;
198 } /* end rxrpc_put_transport() */
200 /*****************************************************************************/
202 * add a service to a transport to be listened upon
204 int rxrpc_add_service(struct rxrpc_transport
*trans
,
205 struct rxrpc_service
*newsrv
)
207 struct rxrpc_service
*srv
;
208 struct list_head
*_p
;
211 _enter("%p{%hu},%p{%hu}",
212 trans
, trans
->port
, newsrv
, newsrv
->service_id
);
214 /* verify that the service ID is not already present */
215 spin_lock(&trans
->lock
);
217 list_for_each(_p
, &trans
->services
) {
218 srv
= list_entry(_p
, struct rxrpc_service
, link
);
219 if (srv
->service_id
== newsrv
->service_id
)
223 /* okay - add the transport to the list */
224 list_add_tail(&newsrv
->link
, &trans
->services
);
225 rxrpc_get_transport(trans
);
229 spin_unlock(&trans
->lock
);
233 } /* end rxrpc_add_service() */
235 /*****************************************************************************/
237 * remove a service from a transport
239 void rxrpc_del_service(struct rxrpc_transport
*trans
, struct rxrpc_service
*srv
)
241 _enter("%p{%hu},%p{%hu}", trans
, trans
->port
, srv
, srv
->service_id
);
243 spin_lock(&trans
->lock
);
244 list_del(&srv
->link
);
245 spin_unlock(&trans
->lock
);
247 rxrpc_put_transport(trans
);
250 } /* end rxrpc_del_service() */
252 /*****************************************************************************/
254 * INET callback when data has been received on the socket.
256 static void rxrpc_data_ready(struct sock
*sk
, int count
)
258 struct rxrpc_transport
*trans
;
260 _enter("%p{t=%p},%d", sk
, sk
->sk_user_data
, count
);
262 /* queue the transport for attention by krxiod */
263 trans
= (struct rxrpc_transport
*) sk
->sk_user_data
;
265 rxrpc_krxiod_queue_transport(trans
);
267 /* wake up anyone waiting on the socket */
268 if (sk
->sk_sleep
&& waitqueue_active(sk
->sk_sleep
))
269 wake_up_interruptible(sk
->sk_sleep
);
272 } /* end rxrpc_data_ready() */
274 /*****************************************************************************/
276 * INET callback when an ICMP error packet is received
277 * - sk->err is error (EHOSTUNREACH, EPROTO or EMSGSIZE)
279 static void rxrpc_error_report(struct sock
*sk
)
281 struct rxrpc_transport
*trans
;
283 _enter("%p{t=%p}", sk
, sk
->sk_user_data
);
285 /* queue the transport for attention by krxiod */
286 trans
= (struct rxrpc_transport
*) sk
->sk_user_data
;
288 trans
->error_rcvd
= 1;
289 rxrpc_krxiod_queue_transport(trans
);
292 /* wake up anyone waiting on the socket */
293 if (sk
->sk_sleep
&& waitqueue_active(sk
->sk_sleep
))
294 wake_up_interruptible(sk
->sk_sleep
);
297 } /* end rxrpc_error_report() */
299 /*****************************************************************************/
301 * split a message up, allocating message records and filling them in
302 * from the contents of a socket buffer
304 static int rxrpc_incoming_msg(struct rxrpc_transport
*trans
,
306 struct list_head
*msgq
)
308 struct rxrpc_message
*msg
;
313 msg
= kzalloc(sizeof(struct rxrpc_message
), GFP_KERNEL
);
315 _leave(" = -ENOMEM");
319 atomic_set(&msg
->usage
, 1);
320 list_add_tail(&msg
->link
,msgq
);
322 /* dig out the Rx routing parameters */
323 if (skb_copy_bits(pkt
, sizeof(struct udphdr
),
324 &msg
->hdr
, sizeof(msg
->hdr
)) < 0) {
330 msg
->state
= RXRPC_MSG_RECEIVED
;
331 skb_get_timestamp(pkt
, &msg
->stamp
);
332 if (msg
->stamp
.tv_sec
== 0) {
333 do_gettimeofday(&msg
->stamp
);
335 sock_enable_timestamp(pkt
->sk
);
337 msg
->seq
= ntohl(msg
->hdr
.seq
);
339 /* attach the packet */
343 msg
->offset
= sizeof(struct udphdr
) + sizeof(struct rxrpc_header
);
344 msg
->dsize
= msg
->pkt
->len
- msg
->offset
;
346 _net("Rx Received packet from %s (%08x;%08x,%1x,%d,%s,%02x,%d,%d)",
347 msg
->hdr
.flags
& RXRPC_CLIENT_INITIATED
? "client" : "server",
348 ntohl(msg
->hdr
.epoch
),
349 (ntohl(msg
->hdr
.cid
) & RXRPC_CIDMASK
) >> RXRPC_CIDSHIFT
,
350 ntohl(msg
->hdr
.cid
) & RXRPC_CHANNELMASK
,
351 ntohl(msg
->hdr
.callNumber
),
352 rxrpc_pkts
[msg
->hdr
.type
],
354 ntohs(msg
->hdr
.serviceId
),
355 msg
->hdr
.securityIndex
);
357 __RXACCT(atomic_inc(&rxrpc_message_count
));
359 /* split off jumbo packets */
360 while (msg
->hdr
.type
== RXRPC_PACKET_TYPE_DATA
&&
361 msg
->hdr
.flags
& RXRPC_JUMBO_PACKET
363 struct rxrpc_jumbo_header jumbo
;
364 struct rxrpc_message
*jumbomsg
= msg
;
366 _debug("split jumbo packet");
368 /* quick sanity check */
371 RXRPC_JUMBO_DATALEN
+ sizeof(struct rxrpc_jumbo_header
))
373 if (msg
->hdr
.flags
& RXRPC_LAST_PACKET
)
376 /* dig out the secondary header */
377 if (skb_copy_bits(pkt
, msg
->offset
+ RXRPC_JUMBO_DATALEN
,
378 &jumbo
, sizeof(jumbo
)) < 0)
381 /* allocate a new message record */
383 msg
= kmemdup(jumbomsg
, sizeof(struct rxrpc_message
), GFP_KERNEL
);
387 list_add_tail(&msg
->link
, msgq
);
389 /* adjust the jumbo packet */
390 jumbomsg
->dsize
= RXRPC_JUMBO_DATALEN
;
392 /* attach the packet here too */
395 /* adjust the parameters */
397 msg
->hdr
.seq
= htonl(msg
->seq
);
398 msg
->hdr
.serial
= htonl(ntohl(msg
->hdr
.serial
) + 1);
399 msg
->offset
+= RXRPC_JUMBO_DATALEN
+
400 sizeof(struct rxrpc_jumbo_header
);
401 msg
->dsize
-= RXRPC_JUMBO_DATALEN
+
402 sizeof(struct rxrpc_jumbo_header
);
403 msg
->hdr
.flags
= jumbo
.flags
;
404 msg
->hdr
._rsvd
= jumbo
._rsvd
;
406 _net("Rx Split jumbo packet from %s"
407 " (%08x;%08x,%1x,%d,%s,%02x,%d,%d)",
408 msg
->hdr
.flags
& RXRPC_CLIENT_INITIATED
? "client" : "server",
409 ntohl(msg
->hdr
.epoch
),
410 (ntohl(msg
->hdr
.cid
) & RXRPC_CIDMASK
) >> RXRPC_CIDSHIFT
,
411 ntohl(msg
->hdr
.cid
) & RXRPC_CHANNELMASK
,
412 ntohl(msg
->hdr
.callNumber
),
413 rxrpc_pkts
[msg
->hdr
.type
],
415 ntohs(msg
->hdr
.serviceId
),
416 msg
->hdr
.securityIndex
);
418 __RXACCT(atomic_inc(&rxrpc_message_count
));
421 _leave(" = 0 #%d", atomic_read(&rxrpc_message_count
));
425 while (!list_empty(msgq
)) {
426 msg
= list_entry(msgq
->next
, struct rxrpc_message
, link
);
427 list_del_init(&msg
->link
);
429 rxrpc_put_message(msg
);
432 _leave(" = %d", ret
);
434 } /* end rxrpc_incoming_msg() */
436 /*****************************************************************************/
439 * - called from krxiod in process context
441 void rxrpc_trans_receive_packet(struct rxrpc_transport
*trans
)
443 struct rxrpc_message
*msg
;
444 struct rxrpc_peer
*peer
;
452 _enter("%p{%d}", trans
, trans
->port
);
455 /* deal with outstanting errors first */
456 if (trans
->error_rcvd
)
457 rxrpc_trans_receive_error_report(trans
);
459 /* attempt to receive a packet */
460 pkt
= skb_recv_datagram(trans
->socket
->sk
, 0, 1, &ret
);
462 if (ret
== -EAGAIN
) {
467 /* an icmp error may have occurred */
468 rxrpc_krxiod_queue_transport(trans
);
469 _leave(" error %d\n", ret
);
473 /* we'll probably need to checksum it (didn't call
475 if (skb_checksum_complete(pkt
)) {
477 rxrpc_krxiod_queue_transport(trans
);
478 _leave(" CSUM failed");
482 addr
= pkt
->nh
.iph
->saddr
;
483 port
= pkt
->h
.uh
->source
;
485 _net("Rx Received UDP packet from %08x:%04hu",
486 ntohl(addr
), ntohs(port
));
488 /* unmarshall the Rx parameters and split jumbo packets */
489 ret
= rxrpc_incoming_msg(trans
, pkt
, &msgq
);
492 rxrpc_krxiod_queue_transport(trans
);
493 _leave(" bad packet");
497 BUG_ON(list_empty(&msgq
));
499 msg
= list_entry(msgq
.next
, struct rxrpc_message
, link
);
501 /* locate the record for the peer from which it
503 ret
= rxrpc_peer_lookup(trans
, addr
, &peer
);
505 kdebug("Rx No connections from that peer");
506 rxrpc_trans_immediate_abort(trans
, msg
, -EINVAL
);
510 /* try and find a matching connection */
511 ret
= rxrpc_connection_lookup(peer
, msg
, &msg
->conn
);
513 kdebug("Rx Unknown Connection");
514 rxrpc_trans_immediate_abort(trans
, msg
, -EINVAL
);
515 rxrpc_put_peer(peer
);
518 rxrpc_put_peer(peer
);
520 /* deal with the first packet of a new call */
521 if (msg
->hdr
.flags
& RXRPC_CLIENT_INITIATED
&&
522 msg
->hdr
.type
== RXRPC_PACKET_TYPE_DATA
&&
523 ntohl(msg
->hdr
.seq
) == 1
525 _debug("Rx New server call");
526 rxrpc_trans_receive_new_call(trans
, &msgq
);
530 /* deal with subsequent packet(s) of call */
531 _debug("Rx Call packet");
532 while (!list_empty(&msgq
)) {
533 msg
= list_entry(msgq
.next
, struct rxrpc_message
, link
);
534 list_del_init(&msg
->link
);
536 ret
= rxrpc_conn_receive_call_packet(msg
->conn
, NULL
, msg
);
538 rxrpc_trans_immediate_abort(trans
, msg
, ret
);
539 rxrpc_put_message(msg
);
543 rxrpc_put_message(msg
);
548 /* dispose of the packets */
550 while (!list_empty(&msgq
)) {
551 msg
= list_entry(msgq
.next
, struct rxrpc_message
, link
);
552 list_del_init(&msg
->link
);
554 rxrpc_put_message(msg
);
561 } /* end rxrpc_trans_receive_packet() */
563 /*****************************************************************************/
565 * accept a new call from a client trying to connect to one of my services
566 * - called in process context
568 static int rxrpc_trans_receive_new_call(struct rxrpc_transport
*trans
,
569 struct list_head
*msgq
)
571 struct rxrpc_message
*msg
;
575 /* only bother with the first packet */
576 msg
= list_entry(msgq
->next
, struct rxrpc_message
, link
);
577 list_del_init(&msg
->link
);
578 rxrpc_krxsecd_queue_incoming_call(msg
);
579 rxrpc_put_message(msg
);
584 } /* end rxrpc_trans_receive_new_call() */
586 /*****************************************************************************/
588 * perform an immediate abort without connection or call structures
590 int rxrpc_trans_immediate_abort(struct rxrpc_transport
*trans
,
591 struct rxrpc_message
*msg
,
594 struct rxrpc_header ahdr
;
595 struct sockaddr_in sin
;
596 struct msghdr msghdr
;
601 _enter("%p,%p,%d", trans
, msg
, error
);
603 /* don't abort an abort packet */
604 if (msg
->hdr
.type
== RXRPC_PACKET_TYPE_ABORT
) {
609 _error
= htonl(-error
);
611 /* set up the message to be transmitted */
612 memcpy(&ahdr
, &msg
->hdr
, sizeof(ahdr
));
613 ahdr
.epoch
= msg
->hdr
.epoch
;
614 ahdr
.serial
= htonl(1);
616 ahdr
.type
= RXRPC_PACKET_TYPE_ABORT
;
617 ahdr
.flags
= RXRPC_LAST_PACKET
;
618 ahdr
.flags
|= ~msg
->hdr
.flags
& RXRPC_CLIENT_INITIATED
;
620 iov
[0].iov_len
= sizeof(ahdr
);
621 iov
[0].iov_base
= &ahdr
;
622 iov
[1].iov_len
= sizeof(_error
);
623 iov
[1].iov_base
= &_error
;
625 len
= sizeof(ahdr
) + sizeof(_error
);
627 memset(&sin
,0,sizeof(sin
));
628 sin
.sin_family
= AF_INET
;
629 sin
.sin_port
= msg
->pkt
->h
.uh
->source
;
630 sin
.sin_addr
.s_addr
= msg
->pkt
->nh
.iph
->saddr
;
632 msghdr
.msg_name
= &sin
;
633 msghdr
.msg_namelen
= sizeof(sin
);
634 msghdr
.msg_control
= NULL
;
635 msghdr
.msg_controllen
= 0;
636 msghdr
.msg_flags
= MSG_DONTWAIT
;
638 _net("Sending message type %d of %d bytes to %08x:%d",
641 ntohl(sin
.sin_addr
.s_addr
),
642 ntohs(sin
.sin_port
));
644 /* send the message */
645 ret
= kernel_sendmsg(trans
->socket
, &msghdr
, iov
, 2, len
);
647 _leave(" = %d", ret
);
649 } /* end rxrpc_trans_immediate_abort() */
651 /*****************************************************************************/
653 * receive an ICMP error report and percolate it to all connections
654 * heading to the affected host or port
656 static void rxrpc_trans_receive_error_report(struct rxrpc_transport
*trans
)
658 struct rxrpc_connection
*conn
;
659 struct sockaddr_in sin
;
660 struct rxrpc_peer
*peer
;
661 struct list_head connq
, *_p
;
662 struct errormsg emsg
;
670 trans
->error_rcvd
= 0;
672 /* try and receive an error message */
674 msg
.msg_namelen
= sizeof(sin
);
675 msg
.msg_control
= &emsg
;
676 msg
.msg_controllen
= sizeof(emsg
);
679 err
= kernel_recvmsg(trans
->socket
, &msg
, NULL
, 0, 0,
680 MSG_ERRQUEUE
| MSG_DONTWAIT
| MSG_TRUNC
);
682 if (err
== -EAGAIN
) {
688 printk("%s: unable to recv an error report: %d\n",
694 msg
.msg_controllen
= (char *) msg
.msg_control
- (char *) &emsg
;
696 if (msg
.msg_controllen
< sizeof(emsg
.cmsg
) ||
697 msg
.msg_namelen
< sizeof(sin
)) {
698 printk("%s: short control message"
699 " (nlen=%u clen=%Zu fl=%x)\n",
707 _net("Rx Received control message"
708 " { len=%Zu level=%u type=%u }",
710 emsg
.cmsg
.cmsg_level
,
711 emsg
.cmsg
.cmsg_type
);
713 if (sin
.sin_family
!= AF_INET
) {
714 printk("Rx Ignoring error report with non-INET address"
720 _net("Rx Received message pertaining to host addr=%x port=%hu",
721 ntohl(sin
.sin_addr
.s_addr
), ntohs(sin
.sin_port
));
723 if (emsg
.cmsg
.cmsg_level
!= SOL_IP
||
724 emsg
.cmsg
.cmsg_type
!= IP_RECVERR
) {
725 printk("Rx Ignoring unknown error report"
726 " { level=%u type=%u }",
727 emsg
.cmsg
.cmsg_level
,
728 emsg
.cmsg
.cmsg_type
);
732 if (msg
.msg_controllen
< sizeof(emsg
.cmsg
) + sizeof(emsg
.ee
)) {
733 printk("%s: short error message (%Zu)\n",
734 __FUNCTION__
, msg
.msg_controllen
);
741 switch (emsg
.ee
.ee_origin
) {
742 case SO_EE_ORIGIN_ICMP
:
744 switch (emsg
.ee
.ee_type
) {
745 case ICMP_DEST_UNREACH
:
746 switch (emsg
.ee
.ee_code
) {
747 case ICMP_NET_UNREACH
:
748 _net("Rx Received ICMP Network Unreachable");
752 case ICMP_HOST_UNREACH
:
753 _net("Rx Received ICMP Host Unreachable");
757 case ICMP_PORT_UNREACH
:
758 _net("Rx Received ICMP Port Unreachable");
761 case ICMP_NET_UNKNOWN
:
762 _net("Rx Received ICMP Unknown Network");
766 case ICMP_HOST_UNKNOWN
:
767 _net("Rx Received ICMP Unknown Host");
772 _net("Rx Received ICMP DestUnreach { code=%u }",
774 err
= emsg
.ee
.ee_errno
;
779 case ICMP_TIME_EXCEEDED
:
780 _net("Rx Received ICMP TTL Exceeded");
781 err
= emsg
.ee
.ee_errno
;
785 _proto("Rx Received ICMP error { type=%u code=%u }",
786 emsg
.ee
.ee_type
, emsg
.ee
.ee_code
);
787 err
= emsg
.ee
.ee_errno
;
792 case SO_EE_ORIGIN_LOCAL
:
793 _proto("Rx Received local error { error=%d }",
796 err
= emsg
.ee
.ee_errno
;
799 case SO_EE_ORIGIN_NONE
:
800 case SO_EE_ORIGIN_ICMP6
:
802 _proto("Rx Received error report { orig=%u }",
805 err
= emsg
.ee
.ee_errno
;
809 /* find all the connections between this transport and the
810 * affected destination */
811 INIT_LIST_HEAD(&connq
);
813 if (rxrpc_peer_lookup(trans
, sin
.sin_addr
.s_addr
,
815 read_lock(&peer
->conn_lock
);
816 list_for_each(_p
, &peer
->conn_active
) {
817 conn
= list_entry(_p
, struct rxrpc_connection
,
819 if (port
&& conn
->addr
.sin_port
!= port
)
821 if (!list_empty(&conn
->err_link
))
824 rxrpc_get_connection(conn
);
825 list_add_tail(&conn
->err_link
, &connq
);
827 read_unlock(&peer
->conn_lock
);
829 /* service all those connections */
830 while (!list_empty(&connq
)) {
831 conn
= list_entry(connq
.next
,
832 struct rxrpc_connection
,
834 list_del(&conn
->err_link
);
836 rxrpc_conn_handle_error(conn
, local
, err
);
838 rxrpc_put_connection(conn
);
841 rxrpc_put_peer(peer
);
847 } /* end rxrpc_trans_receive_error_report() */