2 * net/tipc/port.c: TIPC port code
4 * Copyright (c) 1992-2007, Ericsson AB
5 * Copyright (c) 2004-2008, 2010-2011, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
40 #include "name_table.h"
42 /* Connection management: */
43 #define PROBING_INTERVAL 3600000 /* [ms] => 1 h */
47 #define MAX_REJECT_SIZE 1024
49 static struct sk_buff
*msg_queue_head
;
50 static struct sk_buff
*msg_queue_tail
;
52 DEFINE_SPINLOCK(tipc_port_list_lock
);
53 static DEFINE_SPINLOCK(queue_lock
);
55 static LIST_HEAD(ports
);
56 static void port_handle_node_down(unsigned long ref
);
57 static struct sk_buff
*port_build_self_abort_msg(struct tipc_port
*, u32 err
);
58 static struct sk_buff
*port_build_peer_abort_msg(struct tipc_port
*, u32 err
);
59 static void port_timeout(unsigned long ref
);
62 static u32
port_peernode(struct tipc_port
*p_ptr
)
64 return msg_destnode(&p_ptr
->phdr
);
67 static u32
port_peerport(struct tipc_port
*p_ptr
)
69 return msg_destport(&p_ptr
->phdr
);
73 * tipc_multicast - send a multicast message to local and remote destinations
76 int tipc_multicast(u32 ref
, struct tipc_name_seq
const *seq
,
77 u32 num_sect
, struct iovec
const *msg_sect
,
78 unsigned int total_len
)
82 struct sk_buff
*ibuf
= NULL
;
83 struct tipc_port_list dports
= {0, NULL
, };
84 struct tipc_port
*oport
= tipc_port_deref(ref
);
91 /* Create multicast message */
94 msg_set_type(hdr
, TIPC_MCAST_MSG
);
95 msg_set_lookup_scope(hdr
, TIPC_CLUSTER_SCOPE
);
96 msg_set_destport(hdr
, 0);
97 msg_set_destnode(hdr
, 0);
98 msg_set_nametype(hdr
, seq
->type
);
99 msg_set_namelower(hdr
, seq
->lower
);
100 msg_set_nameupper(hdr
, seq
->upper
);
101 msg_set_hdr_sz(hdr
, MCAST_H_SIZE
);
102 res
= tipc_msg_build(hdr
, msg_sect
, num_sect
, total_len
, MAX_MSG_SIZE
,
103 !oport
->user_port
, &buf
);
107 /* Figure out where to send multicast message */
109 ext_targets
= tipc_nametbl_mc_translate(seq
->type
, seq
->lower
, seq
->upper
,
110 TIPC_NODE_SCOPE
, &dports
);
112 /* Send message to destinations (duplicate it only if necessary) */
115 if (dports
.count
!= 0) {
116 ibuf
= skb_copy(buf
, GFP_ATOMIC
);
118 tipc_port_list_free(&dports
);
123 res
= tipc_bclink_send_msg(buf
);
124 if ((res
< 0) && (dports
.count
!= 0))
132 tipc_port_recv_mcast(ibuf
, &dports
);
134 tipc_port_list_free(&dports
);
140 * tipc_port_recv_mcast - deliver multicast message to all destination ports
142 * If there is no port list, perform a lookup to create one
145 void tipc_port_recv_mcast(struct sk_buff
*buf
, struct tipc_port_list
*dp
)
147 struct tipc_msg
*msg
;
148 struct tipc_port_list dports
= {0, NULL
, };
149 struct tipc_port_list
*item
= dp
;
154 /* Create destination port list, if one wasn't supplied */
157 tipc_nametbl_mc_translate(msg_nametype(msg
),
165 /* Deliver a copy of message to each destination port */
167 if (dp
->count
!= 0) {
168 msg_set_destnode(msg
, tipc_own_addr
);
169 if (dp
->count
== 1) {
170 msg_set_destport(msg
, dp
->ports
[0]);
171 tipc_port_recv_msg(buf
);
172 tipc_port_list_free(dp
);
175 for (; cnt
< dp
->count
; cnt
++) {
176 int index
= cnt
% PLSIZE
;
177 struct sk_buff
*b
= skb_clone(buf
, GFP_ATOMIC
);
180 warn("Unable to deliver multicast message(s)\n");
183 if ((index
== 0) && (cnt
!= 0))
185 msg_set_destport(buf_msg(b
), item
->ports
[index
]);
186 tipc_port_recv_msg(b
);
191 tipc_port_list_free(dp
);
195 * tipc_createport_raw - create a generic TIPC port
197 * Returns pointer to (locked) TIPC port, or NULL if unable to create it
200 struct tipc_port
*tipc_createport_raw(void *usr_handle
,
201 u32 (*dispatcher
)(struct tipc_port
*, struct sk_buff
*),
202 void (*wakeup
)(struct tipc_port
*),
203 const u32 importance
)
205 struct tipc_port
*p_ptr
;
206 struct tipc_msg
*msg
;
209 p_ptr
= kzalloc(sizeof(*p_ptr
), GFP_ATOMIC
);
211 warn("Port creation failed, no memory\n");
214 ref
= tipc_ref_acquire(p_ptr
, &p_ptr
->lock
);
216 warn("Port creation failed, reference table exhausted\n");
221 p_ptr
->usr_handle
= usr_handle
;
222 p_ptr
->max_pkt
= MAX_PKT_DEFAULT
;
225 tipc_msg_init(msg
, importance
, TIPC_NAMED_MSG
, NAMED_H_SIZE
, 0);
226 msg_set_origport(msg
, ref
);
227 INIT_LIST_HEAD(&p_ptr
->wait_list
);
228 INIT_LIST_HEAD(&p_ptr
->subscription
.nodesub_list
);
229 p_ptr
->dispatcher
= dispatcher
;
230 p_ptr
->wakeup
= wakeup
;
231 p_ptr
->user_port
= NULL
;
232 k_init_timer(&p_ptr
->timer
, (Handler
)port_timeout
, ref
);
233 spin_lock_bh(&tipc_port_list_lock
);
234 INIT_LIST_HEAD(&p_ptr
->publications
);
235 INIT_LIST_HEAD(&p_ptr
->port_list
);
236 list_add_tail(&p_ptr
->port_list
, &ports
);
237 spin_unlock_bh(&tipc_port_list_lock
);
241 int tipc_deleteport(u32 ref
)
243 struct tipc_port
*p_ptr
;
244 struct sk_buff
*buf
= NULL
;
246 tipc_withdraw(ref
, 0, NULL
);
247 p_ptr
= tipc_port_lock(ref
);
251 tipc_ref_discard(ref
);
252 tipc_port_unlock(p_ptr
);
254 k_cancel_timer(&p_ptr
->timer
);
255 if (p_ptr
->connected
) {
256 buf
= port_build_peer_abort_msg(p_ptr
, TIPC_ERR_NO_PORT
);
257 tipc_nodesub_unsubscribe(&p_ptr
->subscription
);
259 kfree(p_ptr
->user_port
);
261 spin_lock_bh(&tipc_port_list_lock
);
262 list_del(&p_ptr
->port_list
);
263 list_del(&p_ptr
->wait_list
);
264 spin_unlock_bh(&tipc_port_list_lock
);
265 k_term_timer(&p_ptr
->timer
);
267 tipc_net_route_msg(buf
);
271 static int port_unreliable(struct tipc_port
*p_ptr
)
273 return msg_src_droppable(&p_ptr
->phdr
);
276 int tipc_portunreliable(u32 ref
, unsigned int *isunreliable
)
278 struct tipc_port
*p_ptr
;
280 p_ptr
= tipc_port_lock(ref
);
283 *isunreliable
= port_unreliable(p_ptr
);
284 tipc_port_unlock(p_ptr
);
288 int tipc_set_portunreliable(u32 ref
, unsigned int isunreliable
)
290 struct tipc_port
*p_ptr
;
292 p_ptr
= tipc_port_lock(ref
);
295 msg_set_src_droppable(&p_ptr
->phdr
, (isunreliable
!= 0));
296 tipc_port_unlock(p_ptr
);
300 static int port_unreturnable(struct tipc_port
*p_ptr
)
302 return msg_dest_droppable(&p_ptr
->phdr
);
305 int tipc_portunreturnable(u32 ref
, unsigned int *isunrejectable
)
307 struct tipc_port
*p_ptr
;
309 p_ptr
= tipc_port_lock(ref
);
312 *isunrejectable
= port_unreturnable(p_ptr
);
313 tipc_port_unlock(p_ptr
);
317 int tipc_set_portunreturnable(u32 ref
, unsigned int isunrejectable
)
319 struct tipc_port
*p_ptr
;
321 p_ptr
= tipc_port_lock(ref
);
324 msg_set_dest_droppable(&p_ptr
->phdr
, (isunrejectable
!= 0));
325 tipc_port_unlock(p_ptr
);
330 * port_build_proto_msg(): create connection protocol message for port
332 * On entry the port must be locked and connected.
334 static struct sk_buff
*port_build_proto_msg(struct tipc_port
*p_ptr
,
338 struct tipc_msg
*msg
;
340 buf
= tipc_buf_acquire(INT_H_SIZE
);
343 tipc_msg_init(msg
, CONN_MANAGER
, type
, INT_H_SIZE
,
344 port_peernode(p_ptr
));
345 msg_set_destport(msg
, port_peerport(p_ptr
));
346 msg_set_origport(msg
, p_ptr
->ref
);
347 msg_set_msgcnt(msg
, ack
);
352 int tipc_reject_msg(struct sk_buff
*buf
, u32 err
)
354 struct tipc_msg
*msg
= buf_msg(buf
);
355 struct sk_buff
*rbuf
;
356 struct tipc_msg
*rmsg
;
359 u32 data_sz
= msg_data_sz(msg
);
363 /* discard rejected message if it shouldn't be returned to sender */
365 if (WARN(!msg_isdata(msg
),
366 "attempt to reject message with user=%u", msg_user(msg
))) {
370 if (msg_errcode(msg
) || msg_dest_droppable(msg
))
374 * construct returned message by copying rejected message header and
375 * data (or subset), then updating header fields that need adjusting
378 hdr_sz
= msg_hdr_sz(msg
);
379 rmsg_sz
= hdr_sz
+ min_t(u32
, data_sz
, MAX_REJECT_SIZE
);
381 rbuf
= tipc_buf_acquire(rmsg_sz
);
385 rmsg
= buf_msg(rbuf
);
386 skb_copy_to_linear_data(rbuf
, msg
, rmsg_sz
);
388 if (msg_connected(rmsg
)) {
389 imp
= msg_importance(rmsg
);
390 if (imp
< TIPC_CRITICAL_IMPORTANCE
)
391 msg_set_importance(rmsg
, ++imp
);
393 msg_set_non_seq(rmsg
, 0);
394 msg_set_size(rmsg
, rmsg_sz
);
395 msg_set_errcode(rmsg
, err
);
396 msg_set_prevnode(rmsg
, tipc_own_addr
);
397 msg_swap_words(rmsg
, 4, 5);
398 if (!msg_short(rmsg
))
399 msg_swap_words(rmsg
, 6, 7);
401 /* send self-abort message when rejecting on a connected port */
402 if (msg_connected(msg
)) {
403 struct tipc_port
*p_ptr
= tipc_port_lock(msg_destport(msg
));
406 struct sk_buff
*abuf
= NULL
;
408 if (p_ptr
->connected
)
409 abuf
= port_build_self_abort_msg(p_ptr
, err
);
410 tipc_port_unlock(p_ptr
);
411 tipc_net_route_msg(abuf
);
415 /* send returned message & dispose of rejected message */
417 src_node
= msg_prevnode(msg
);
418 if (src_node
== tipc_own_addr
)
419 tipc_port_recv_msg(rbuf
);
421 tipc_link_send(rbuf
, src_node
, msg_link_selector(rmsg
));
427 int tipc_port_reject_sections(struct tipc_port
*p_ptr
, struct tipc_msg
*hdr
,
428 struct iovec
const *msg_sect
, u32 num_sect
,
429 unsigned int total_len
, int err
)
434 res
= tipc_msg_build(hdr
, msg_sect
, num_sect
, total_len
, MAX_MSG_SIZE
,
435 !p_ptr
->user_port
, &buf
);
439 return tipc_reject_msg(buf
, err
);
442 static void port_timeout(unsigned long ref
)
444 struct tipc_port
*p_ptr
= tipc_port_lock(ref
);
445 struct sk_buff
*buf
= NULL
;
450 if (!p_ptr
->connected
) {
451 tipc_port_unlock(p_ptr
);
455 /* Last probe answered ? */
456 if (p_ptr
->probing_state
== PROBING
) {
457 buf
= port_build_self_abort_msg(p_ptr
, TIPC_ERR_NO_PORT
);
459 buf
= port_build_proto_msg(p_ptr
, CONN_PROBE
, 0);
460 p_ptr
->probing_state
= PROBING
;
461 k_start_timer(&p_ptr
->timer
, p_ptr
->probing_interval
);
463 tipc_port_unlock(p_ptr
);
464 tipc_net_route_msg(buf
);
468 static void port_handle_node_down(unsigned long ref
)
470 struct tipc_port
*p_ptr
= tipc_port_lock(ref
);
471 struct sk_buff
*buf
= NULL
;
475 buf
= port_build_self_abort_msg(p_ptr
, TIPC_ERR_NO_NODE
);
476 tipc_port_unlock(p_ptr
);
477 tipc_net_route_msg(buf
);
481 static struct sk_buff
*port_build_self_abort_msg(struct tipc_port
*p_ptr
, u32 err
)
483 struct sk_buff
*buf
= port_build_peer_abort_msg(p_ptr
, err
);
486 struct tipc_msg
*msg
= buf_msg(buf
);
487 msg_swap_words(msg
, 4, 5);
488 msg_swap_words(msg
, 6, 7);
494 static struct sk_buff
*port_build_peer_abort_msg(struct tipc_port
*p_ptr
, u32 err
)
497 struct tipc_msg
*msg
;
500 if (!p_ptr
->connected
)
503 buf
= tipc_buf_acquire(BASIC_H_SIZE
);
506 memcpy(msg
, &p_ptr
->phdr
, BASIC_H_SIZE
);
507 msg_set_hdr_sz(msg
, BASIC_H_SIZE
);
508 msg_set_size(msg
, BASIC_H_SIZE
);
509 imp
= msg_importance(msg
);
510 if (imp
< TIPC_CRITICAL_IMPORTANCE
)
511 msg_set_importance(msg
, ++imp
);
512 msg_set_errcode(msg
, err
);
517 void tipc_port_recv_proto_msg(struct sk_buff
*buf
)
519 struct tipc_msg
*msg
= buf_msg(buf
);
520 struct tipc_port
*p_ptr
;
521 struct sk_buff
*r_buf
= NULL
;
522 u32 orignode
= msg_orignode(msg
);
523 u32 origport
= msg_origport(msg
);
524 u32 destport
= msg_destport(msg
);
527 /* Validate connection */
529 p_ptr
= tipc_port_lock(destport
);
530 if (!p_ptr
|| !p_ptr
->connected
||
531 (port_peernode(p_ptr
) != orignode
) ||
532 (port_peerport(p_ptr
) != origport
)) {
533 r_buf
= tipc_buf_acquire(BASIC_H_SIZE
);
535 msg
= buf_msg(r_buf
);
536 tipc_msg_init(msg
, TIPC_HIGH_IMPORTANCE
, TIPC_CONN_MSG
,
537 BASIC_H_SIZE
, orignode
);
538 msg_set_errcode(msg
, TIPC_ERR_NO_PORT
);
539 msg_set_origport(msg
, destport
);
540 msg_set_destport(msg
, origport
);
543 tipc_port_unlock(p_ptr
);
547 /* Process protocol message sent by peer */
549 switch (msg_type(msg
)) {
551 wakeable
= tipc_port_congested(p_ptr
) && p_ptr
->congested
&&
553 p_ptr
->acked
+= msg_msgcnt(msg
);
554 if (!tipc_port_congested(p_ptr
)) {
555 p_ptr
->congested
= 0;
557 p_ptr
->wakeup(p_ptr
);
561 r_buf
= port_build_proto_msg(p_ptr
, CONN_PROBE_REPLY
, 0);
564 /* CONN_PROBE_REPLY or unrecognized - no action required */
567 p_ptr
->probing_state
= CONFIRMED
;
568 tipc_port_unlock(p_ptr
);
570 tipc_net_route_msg(r_buf
);
574 static void port_print(struct tipc_port
*p_ptr
, struct print_buf
*buf
, int full_id
)
576 struct publication
*publ
;
579 tipc_printf(buf
, "<%u.%u.%u:%u>:",
580 tipc_zone(tipc_own_addr
), tipc_cluster(tipc_own_addr
),
581 tipc_node(tipc_own_addr
), p_ptr
->ref
);
583 tipc_printf(buf
, "%-10u:", p_ptr
->ref
);
585 if (p_ptr
->connected
) {
586 u32 dport
= port_peerport(p_ptr
);
587 u32 destnode
= port_peernode(p_ptr
);
589 tipc_printf(buf
, " connected to <%u.%u.%u:%u>",
590 tipc_zone(destnode
), tipc_cluster(destnode
),
591 tipc_node(destnode
), dport
);
592 if (p_ptr
->conn_type
!= 0)
593 tipc_printf(buf
, " via {%u,%u}",
595 p_ptr
->conn_instance
);
596 } else if (p_ptr
->published
) {
597 tipc_printf(buf
, " bound to");
598 list_for_each_entry(publ
, &p_ptr
->publications
, pport_list
) {
599 if (publ
->lower
== publ
->upper
)
600 tipc_printf(buf
, " {%u,%u}", publ
->type
,
603 tipc_printf(buf
, " {%u,%u,%u}", publ
->type
,
604 publ
->lower
, publ
->upper
);
607 tipc_printf(buf
, "\n");
610 #define MAX_PORT_QUERY 32768
612 struct sk_buff
*tipc_port_get_ports(void)
615 struct tlv_desc
*rep_tlv
;
617 struct tipc_port
*p_ptr
;
620 buf
= tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY
));
623 rep_tlv
= (struct tlv_desc
*)buf
->data
;
625 tipc_printbuf_init(&pb
, TLV_DATA(rep_tlv
), MAX_PORT_QUERY
);
626 spin_lock_bh(&tipc_port_list_lock
);
627 list_for_each_entry(p_ptr
, &ports
, port_list
) {
628 spin_lock_bh(p_ptr
->lock
);
629 port_print(p_ptr
, &pb
, 0);
630 spin_unlock_bh(p_ptr
->lock
);
632 spin_unlock_bh(&tipc_port_list_lock
);
633 str_len
= tipc_printbuf_validate(&pb
);
635 skb_put(buf
, TLV_SPACE(str_len
));
636 TLV_SET(rep_tlv
, TIPC_TLV_ULTRA_STRING
, NULL
, str_len
);
641 void tipc_port_reinit(void)
643 struct tipc_port
*p_ptr
;
644 struct tipc_msg
*msg
;
646 spin_lock_bh(&tipc_port_list_lock
);
647 list_for_each_entry(p_ptr
, &ports
, port_list
) {
649 if (msg_orignode(msg
) == tipc_own_addr
)
651 msg_set_prevnode(msg
, tipc_own_addr
);
652 msg_set_orignode(msg
, tipc_own_addr
);
654 spin_unlock_bh(&tipc_port_list_lock
);
659 * port_dispatcher_sigh(): Signal handler for messages destinated
660 * to the tipc_port interface.
663 static void port_dispatcher_sigh(void *dummy
)
667 spin_lock_bh(&queue_lock
);
668 buf
= msg_queue_head
;
669 msg_queue_head
= NULL
;
670 spin_unlock_bh(&queue_lock
);
673 struct tipc_port
*p_ptr
;
674 struct user_port
*up_ptr
;
675 struct tipc_portid orig
;
676 struct tipc_name_seq dseq
;
682 struct sk_buff
*next
= buf
->next
;
683 struct tipc_msg
*msg
= buf_msg(buf
);
684 u32 dref
= msg_destport(msg
);
686 message_type
= msg_type(msg
);
687 if (message_type
> TIPC_DIRECT_MSG
)
688 goto reject
; /* Unsupported message type */
690 p_ptr
= tipc_port_lock(dref
);
692 goto reject
; /* Port deleted while msg in queue */
694 orig
.ref
= msg_origport(msg
);
695 orig
.node
= msg_orignode(msg
);
696 up_ptr
= p_ptr
->user_port
;
697 usr_handle
= up_ptr
->usr_handle
;
698 connected
= p_ptr
->connected
;
699 published
= p_ptr
->published
;
701 if (unlikely(msg_errcode(msg
)))
704 switch (message_type
) {
707 tipc_conn_msg_event cb
= up_ptr
->conn_msg_cb
;
708 u32 peer_port
= port_peerport(p_ptr
);
709 u32 peer_node
= port_peernode(p_ptr
);
712 tipc_port_unlock(p_ptr
);
715 if (unlikely(!connected
)) {
716 if (tipc_connect2port(dref
, &orig
))
718 } else if ((msg_origport(msg
) != peer_port
) ||
719 (msg_orignode(msg
) != peer_node
))
721 dsz
= msg_data_sz(msg
);
723 (++p_ptr
->conn_unacked
>=
724 TIPC_FLOW_CONTROL_WIN
)))
725 tipc_acknowledge(dref
,
726 p_ptr
->conn_unacked
);
727 skb_pull(buf
, msg_hdr_sz(msg
));
728 cb(usr_handle
, dref
, &buf
, msg_data(msg
), dsz
);
731 case TIPC_DIRECT_MSG
:{
732 tipc_msg_event cb
= up_ptr
->msg_cb
;
734 tipc_port_unlock(p_ptr
);
735 if (unlikely(!cb
|| connected
))
737 skb_pull(buf
, msg_hdr_sz(msg
));
738 cb(usr_handle
, dref
, &buf
, msg_data(msg
),
739 msg_data_sz(msg
), msg_importance(msg
),
744 case TIPC_NAMED_MSG
:{
745 tipc_named_msg_event cb
= up_ptr
->named_msg_cb
;
747 tipc_port_unlock(p_ptr
);
748 if (unlikely(!cb
|| connected
|| !published
))
750 dseq
.type
= msg_nametype(msg
);
751 dseq
.lower
= msg_nameinst(msg
);
752 dseq
.upper
= (message_type
== TIPC_NAMED_MSG
)
753 ? dseq
.lower
: msg_nameupper(msg
);
754 skb_pull(buf
, msg_hdr_sz(msg
));
755 cb(usr_handle
, dref
, &buf
, msg_data(msg
),
756 msg_data_sz(msg
), msg_importance(msg
),
766 switch (message_type
) {
769 tipc_conn_shutdown_event cb
=
771 u32 peer_port
= port_peerport(p_ptr
);
772 u32 peer_node
= port_peernode(p_ptr
);
774 tipc_port_unlock(p_ptr
);
775 if (!cb
|| !connected
)
777 if ((msg_origport(msg
) != peer_port
) ||
778 (msg_orignode(msg
) != peer_node
))
780 tipc_disconnect(dref
);
781 skb_pull(buf
, msg_hdr_sz(msg
));
782 cb(usr_handle
, dref
, &buf
, msg_data(msg
),
783 msg_data_sz(msg
), msg_errcode(msg
));
786 case TIPC_DIRECT_MSG
:{
787 tipc_msg_err_event cb
= up_ptr
->err_cb
;
789 tipc_port_unlock(p_ptr
);
790 if (!cb
|| connected
)
792 skb_pull(buf
, msg_hdr_sz(msg
));
793 cb(usr_handle
, dref
, &buf
, msg_data(msg
),
794 msg_data_sz(msg
), msg_errcode(msg
), &orig
);
798 case TIPC_NAMED_MSG
:{
799 tipc_named_msg_err_event cb
=
800 up_ptr
->named_err_cb
;
802 tipc_port_unlock(p_ptr
);
803 if (!cb
|| connected
)
805 dseq
.type
= msg_nametype(msg
);
806 dseq
.lower
= msg_nameinst(msg
);
807 dseq
.upper
= (message_type
== TIPC_NAMED_MSG
)
808 ? dseq
.lower
: msg_nameupper(msg
);
809 skb_pull(buf
, msg_hdr_sz(msg
));
810 cb(usr_handle
, dref
, &buf
, msg_data(msg
),
811 msg_data_sz(msg
), msg_errcode(msg
), &dseq
);
820 tipc_reject_msg(buf
, TIPC_ERR_NO_PORT
);
826 * port_dispatcher(): Dispatcher for messages destinated
827 * to the tipc_port interface. Called with port locked.
830 static u32
port_dispatcher(struct tipc_port
*dummy
, struct sk_buff
*buf
)
833 spin_lock_bh(&queue_lock
);
834 if (msg_queue_head
) {
835 msg_queue_tail
->next
= buf
;
836 msg_queue_tail
= buf
;
838 msg_queue_tail
= msg_queue_head
= buf
;
839 tipc_k_signal((Handler
)port_dispatcher_sigh
, 0);
841 spin_unlock_bh(&queue_lock
);
846 * Wake up port after congestion: Called with port locked,
850 static void port_wakeup_sh(unsigned long ref
)
852 struct tipc_port
*p_ptr
;
853 struct user_port
*up_ptr
;
854 tipc_continue_event cb
= NULL
;
857 p_ptr
= tipc_port_lock(ref
);
859 up_ptr
= p_ptr
->user_port
;
861 cb
= up_ptr
->continue_event_cb
;
862 uh
= up_ptr
->usr_handle
;
864 tipc_port_unlock(p_ptr
);
871 static void port_wakeup(struct tipc_port
*p_ptr
)
873 tipc_k_signal((Handler
)port_wakeup_sh
, p_ptr
->ref
);
876 void tipc_acknowledge(u32 ref
, u32 ack
)
878 struct tipc_port
*p_ptr
;
879 struct sk_buff
*buf
= NULL
;
881 p_ptr
= tipc_port_lock(ref
);
884 if (p_ptr
->connected
) {
885 p_ptr
->conn_unacked
-= ack
;
886 buf
= port_build_proto_msg(p_ptr
, CONN_ACK
, ack
);
888 tipc_port_unlock(p_ptr
);
889 tipc_net_route_msg(buf
);
893 * tipc_createport(): user level call.
896 int tipc_createport(void *usr_handle
,
897 unsigned int importance
,
898 tipc_msg_err_event error_cb
,
899 tipc_named_msg_err_event named_error_cb
,
900 tipc_conn_shutdown_event conn_error_cb
,
901 tipc_msg_event msg_cb
,
902 tipc_named_msg_event named_msg_cb
,
903 tipc_conn_msg_event conn_msg_cb
,
904 tipc_continue_event continue_event_cb
,/* May be zero */
907 struct user_port
*up_ptr
;
908 struct tipc_port
*p_ptr
;
910 up_ptr
= kmalloc(sizeof(*up_ptr
), GFP_ATOMIC
);
912 warn("Port creation failed, no memory\n");
915 p_ptr
= (struct tipc_port
*)tipc_createport_raw(NULL
, port_dispatcher
,
916 port_wakeup
, importance
);
922 p_ptr
->user_port
= up_ptr
;
923 up_ptr
->usr_handle
= usr_handle
;
924 up_ptr
->ref
= p_ptr
->ref
;
925 up_ptr
->err_cb
= error_cb
;
926 up_ptr
->named_err_cb
= named_error_cb
;
927 up_ptr
->conn_err_cb
= conn_error_cb
;
928 up_ptr
->msg_cb
= msg_cb
;
929 up_ptr
->named_msg_cb
= named_msg_cb
;
930 up_ptr
->conn_msg_cb
= conn_msg_cb
;
931 up_ptr
->continue_event_cb
= continue_event_cb
;
932 *portref
= p_ptr
->ref
;
933 tipc_port_unlock(p_ptr
);
937 int tipc_portimportance(u32 ref
, unsigned int *importance
)
939 struct tipc_port
*p_ptr
;
941 p_ptr
= tipc_port_lock(ref
);
944 *importance
= (unsigned int)msg_importance(&p_ptr
->phdr
);
945 tipc_port_unlock(p_ptr
);
949 int tipc_set_portimportance(u32 ref
, unsigned int imp
)
951 struct tipc_port
*p_ptr
;
953 if (imp
> TIPC_CRITICAL_IMPORTANCE
)
956 p_ptr
= tipc_port_lock(ref
);
959 msg_set_importance(&p_ptr
->phdr
, (u32
)imp
);
960 tipc_port_unlock(p_ptr
);
965 int tipc_publish(u32 ref
, unsigned int scope
, struct tipc_name_seq
const *seq
)
967 struct tipc_port
*p_ptr
;
968 struct publication
*publ
;
972 p_ptr
= tipc_port_lock(ref
);
976 if (p_ptr
->connected
)
978 if (seq
->lower
> seq
->upper
)
980 if ((scope
< TIPC_ZONE_SCOPE
) || (scope
> TIPC_NODE_SCOPE
))
982 key
= ref
+ p_ptr
->pub_count
+ 1;
987 publ
= tipc_nametbl_publish(seq
->type
, seq
->lower
, seq
->upper
,
988 scope
, p_ptr
->ref
, key
);
990 list_add(&publ
->pport_list
, &p_ptr
->publications
);
992 p_ptr
->published
= 1;
996 tipc_port_unlock(p_ptr
);
1000 int tipc_withdraw(u32 ref
, unsigned int scope
, struct tipc_name_seq
const *seq
)
1002 struct tipc_port
*p_ptr
;
1003 struct publication
*publ
;
1004 struct publication
*tpubl
;
1007 p_ptr
= tipc_port_lock(ref
);
1011 list_for_each_entry_safe(publ
, tpubl
,
1012 &p_ptr
->publications
, pport_list
) {
1013 tipc_nametbl_withdraw(publ
->type
, publ
->lower
,
1014 publ
->ref
, publ
->key
);
1018 list_for_each_entry_safe(publ
, tpubl
,
1019 &p_ptr
->publications
, pport_list
) {
1020 if (publ
->scope
!= scope
)
1022 if (publ
->type
!= seq
->type
)
1024 if (publ
->lower
!= seq
->lower
)
1026 if (publ
->upper
!= seq
->upper
)
1028 tipc_nametbl_withdraw(publ
->type
, publ
->lower
,
1029 publ
->ref
, publ
->key
);
1034 if (list_empty(&p_ptr
->publications
))
1035 p_ptr
->published
= 0;
1036 tipc_port_unlock(p_ptr
);
1040 int tipc_connect2port(u32 ref
, struct tipc_portid
const *peer
)
1042 struct tipc_port
*p_ptr
;
1043 struct tipc_msg
*msg
;
1046 p_ptr
= tipc_port_lock(ref
);
1049 if (p_ptr
->published
|| p_ptr
->connected
)
1055 msg_set_destnode(msg
, peer
->node
);
1056 msg_set_destport(msg
, peer
->ref
);
1057 msg_set_type(msg
, TIPC_CONN_MSG
);
1058 msg_set_lookup_scope(msg
, 0);
1059 msg_set_hdr_sz(msg
, SHORT_H_SIZE
);
1061 p_ptr
->probing_interval
= PROBING_INTERVAL
;
1062 p_ptr
->probing_state
= CONFIRMED
;
1063 p_ptr
->connected
= 1;
1064 k_start_timer(&p_ptr
->timer
, p_ptr
->probing_interval
);
1066 tipc_nodesub_subscribe(&p_ptr
->subscription
, peer
->node
,
1067 (void *)(unsigned long)ref
,
1068 (net_ev_handler
)port_handle_node_down
);
1071 tipc_port_unlock(p_ptr
);
1072 p_ptr
->max_pkt
= tipc_link_get_max_pkt(peer
->node
, ref
);
1077 * tipc_disconnect_port - disconnect port from peer
1079 * Port must be locked.
1082 int tipc_disconnect_port(struct tipc_port
*tp_ptr
)
1086 if (tp_ptr
->connected
) {
1087 tp_ptr
->connected
= 0;
1088 /* let timer expire on it's own to avoid deadlock! */
1089 tipc_nodesub_unsubscribe(
1090 &((struct tipc_port
*)tp_ptr
)->subscription
);
1099 * tipc_disconnect(): Disconnect port form peer.
1100 * This is a node local operation.
1103 int tipc_disconnect(u32 ref
)
1105 struct tipc_port
*p_ptr
;
1108 p_ptr
= tipc_port_lock(ref
);
1111 res
= tipc_disconnect_port((struct tipc_port
*)p_ptr
);
1112 tipc_port_unlock(p_ptr
);
1117 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1119 int tipc_shutdown(u32 ref
)
1121 struct tipc_port
*p_ptr
;
1122 struct sk_buff
*buf
= NULL
;
1124 p_ptr
= tipc_port_lock(ref
);
1128 buf
= port_build_peer_abort_msg(p_ptr
, TIPC_CONN_SHUTDOWN
);
1129 tipc_port_unlock(p_ptr
);
1130 tipc_net_route_msg(buf
);
1131 return tipc_disconnect(ref
);
1135 * tipc_port_recv_msg - receive message from lower layer and deliver to port user
1138 int tipc_port_recv_msg(struct sk_buff
*buf
)
1140 struct tipc_port
*p_ptr
;
1141 struct tipc_msg
*msg
= buf_msg(buf
);
1142 u32 destport
= msg_destport(msg
);
1143 u32 dsz
= msg_data_sz(msg
);
1146 /* forward unresolved named message */
1147 if (unlikely(!destport
)) {
1148 tipc_net_route_msg(buf
);
1152 /* validate destination & pass to port, otherwise reject message */
1153 p_ptr
= tipc_port_lock(destport
);
1154 if (likely(p_ptr
)) {
1155 if (likely(p_ptr
->connected
)) {
1156 if ((unlikely(msg_origport(msg
) !=
1157 tipc_peer_port(p_ptr
))) ||
1158 (unlikely(msg_orignode(msg
) !=
1159 tipc_peer_node(p_ptr
))) ||
1160 (unlikely(!msg_connected(msg
)))) {
1161 err
= TIPC_ERR_NO_PORT
;
1162 tipc_port_unlock(p_ptr
);
1166 err
= p_ptr
->dispatcher(p_ptr
, buf
);
1167 tipc_port_unlock(p_ptr
);
1171 err
= TIPC_ERR_NO_PORT
;
1174 return tipc_reject_msg(buf
, err
);
1178 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1179 * message for this node.
1182 static int tipc_port_recv_sections(struct tipc_port
*sender
, unsigned int num_sect
,
1183 struct iovec
const *msg_sect
,
1184 unsigned int total_len
)
1186 struct sk_buff
*buf
;
1189 res
= tipc_msg_build(&sender
->phdr
, msg_sect
, num_sect
, total_len
,
1190 MAX_MSG_SIZE
, !sender
->user_port
, &buf
);
1192 tipc_port_recv_msg(buf
);
1197 * tipc_send - send message sections on connection
1200 int tipc_send(u32 ref
, unsigned int num_sect
, struct iovec
const *msg_sect
,
1201 unsigned int total_len
)
1203 struct tipc_port
*p_ptr
;
1207 p_ptr
= tipc_port_deref(ref
);
1208 if (!p_ptr
|| !p_ptr
->connected
)
1211 p_ptr
->congested
= 1;
1212 if (!tipc_port_congested(p_ptr
)) {
1213 destnode
= port_peernode(p_ptr
);
1214 if (likely(destnode
!= tipc_own_addr
))
1215 res
= tipc_link_send_sections_fast(p_ptr
, msg_sect
, num_sect
,
1216 total_len
, destnode
);
1218 res
= tipc_port_recv_sections(p_ptr
, num_sect
, msg_sect
,
1221 if (likely(res
!= -ELINKCONG
)) {
1222 p_ptr
->congested
= 0;
1228 if (port_unreliable(p_ptr
)) {
1229 p_ptr
->congested
= 0;
1236 * tipc_send2name - send message sections to port name
1239 int tipc_send2name(u32 ref
, struct tipc_name
const *name
, unsigned int domain
,
1240 unsigned int num_sect
, struct iovec
const *msg_sect
,
1241 unsigned int total_len
)
1243 struct tipc_port
*p_ptr
;
1244 struct tipc_msg
*msg
;
1245 u32 destnode
= domain
;
1249 p_ptr
= tipc_port_deref(ref
);
1250 if (!p_ptr
|| p_ptr
->connected
)
1254 msg_set_type(msg
, TIPC_NAMED_MSG
);
1255 msg_set_hdr_sz(msg
, NAMED_H_SIZE
);
1256 msg_set_nametype(msg
, name
->type
);
1257 msg_set_nameinst(msg
, name
->instance
);
1258 msg_set_lookup_scope(msg
, tipc_addr_scope(domain
));
1259 destport
= tipc_nametbl_translate(name
->type
, name
->instance
, &destnode
);
1260 msg_set_destnode(msg
, destnode
);
1261 msg_set_destport(msg
, destport
);
1263 if (likely(destport
|| destnode
)) {
1264 if (likely(destnode
== tipc_own_addr
))
1265 res
= tipc_port_recv_sections(p_ptr
, num_sect
,
1266 msg_sect
, total_len
);
1268 res
= tipc_link_send_sections_fast(p_ptr
, msg_sect
,
1269 num_sect
, total_len
,
1271 if (likely(res
!= -ELINKCONG
)) {
1276 if (port_unreliable(p_ptr
)) {
1281 return tipc_port_reject_sections(p_ptr
, msg
, msg_sect
, num_sect
,
1282 total_len
, TIPC_ERR_NO_NAME
);
1286 * tipc_send2port - send message sections to port identity
1289 int tipc_send2port(u32 ref
, struct tipc_portid
const *dest
,
1290 unsigned int num_sect
, struct iovec
const *msg_sect
,
1291 unsigned int total_len
)
1293 struct tipc_port
*p_ptr
;
1294 struct tipc_msg
*msg
;
1297 p_ptr
= tipc_port_deref(ref
);
1298 if (!p_ptr
|| p_ptr
->connected
)
1302 msg_set_type(msg
, TIPC_DIRECT_MSG
);
1303 msg_set_lookup_scope(msg
, 0);
1304 msg_set_destnode(msg
, dest
->node
);
1305 msg_set_destport(msg
, dest
->ref
);
1306 msg_set_hdr_sz(msg
, BASIC_H_SIZE
);
1308 if (dest
->node
== tipc_own_addr
)
1309 res
= tipc_port_recv_sections(p_ptr
, num_sect
, msg_sect
,
1312 res
= tipc_link_send_sections_fast(p_ptr
, msg_sect
, num_sect
,
1313 total_len
, dest
->node
);
1314 if (likely(res
!= -ELINKCONG
)) {
1319 if (port_unreliable(p_ptr
)) {
1326 * tipc_send_buf2port - send message buffer to port identity
1329 int tipc_send_buf2port(u32 ref
, struct tipc_portid
const *dest
,
1330 struct sk_buff
*buf
, unsigned int dsz
)
1332 struct tipc_port
*p_ptr
;
1333 struct tipc_msg
*msg
;
1336 p_ptr
= (struct tipc_port
*)tipc_ref_deref(ref
);
1337 if (!p_ptr
|| p_ptr
->connected
)
1341 msg_set_type(msg
, TIPC_DIRECT_MSG
);
1342 msg_set_destnode(msg
, dest
->node
);
1343 msg_set_destport(msg
, dest
->ref
);
1344 msg_set_hdr_sz(msg
, BASIC_H_SIZE
);
1345 msg_set_size(msg
, BASIC_H_SIZE
+ dsz
);
1346 if (skb_cow(buf
, BASIC_H_SIZE
))
1349 skb_push(buf
, BASIC_H_SIZE
);
1350 skb_copy_to_linear_data(buf
, msg
, BASIC_H_SIZE
);
1352 if (dest
->node
== tipc_own_addr
)
1353 res
= tipc_port_recv_msg(buf
);
1355 res
= tipc_send_buf_fast(buf
, dest
->node
);
1356 if (likely(res
!= -ELINKCONG
)) {
1361 if (port_unreliable(p_ptr
))