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_port_peer_msg - verify message was sent by connected port's peer
75 * Handles cases where the node's network address has changed from
76 * the default of <0.0.0> to its configured setting.
78 int tipc_port_peer_msg(struct tipc_port
*p_ptr
, struct tipc_msg
*msg
)
83 if (msg_origport(msg
) != port_peerport(p_ptr
))
86 orignode
= msg_orignode(msg
);
87 peernode
= port_peernode(p_ptr
);
88 return (orignode
== peernode
) ||
89 (!orignode
&& (peernode
== tipc_own_addr
)) ||
90 (!peernode
&& (orignode
== tipc_own_addr
));
94 * tipc_multicast - send a multicast message to local and remote destinations
96 int tipc_multicast(u32 ref
, struct tipc_name_seq
const *seq
,
97 u32 num_sect
, struct iovec
const *msg_sect
,
98 unsigned int total_len
)
100 struct tipc_msg
*hdr
;
102 struct sk_buff
*ibuf
= NULL
;
103 struct tipc_port_list dports
= {0, NULL
, };
104 struct tipc_port
*oport
= tipc_port_deref(ref
);
108 if (unlikely(!oport
))
111 /* Create multicast message */
113 msg_set_type(hdr
, TIPC_MCAST_MSG
);
114 msg_set_lookup_scope(hdr
, TIPC_CLUSTER_SCOPE
);
115 msg_set_destport(hdr
, 0);
116 msg_set_destnode(hdr
, 0);
117 msg_set_nametype(hdr
, seq
->type
);
118 msg_set_namelower(hdr
, seq
->lower
);
119 msg_set_nameupper(hdr
, seq
->upper
);
120 msg_set_hdr_sz(hdr
, MCAST_H_SIZE
);
121 res
= tipc_msg_build(hdr
, msg_sect
, num_sect
, total_len
, MAX_MSG_SIZE
,
122 !oport
->user_port
, &buf
);
126 /* Figure out where to send multicast message */
127 ext_targets
= tipc_nametbl_mc_translate(seq
->type
, seq
->lower
, seq
->upper
,
128 TIPC_NODE_SCOPE
, &dports
);
130 /* Send message to destinations (duplicate it only if necessary) */
132 if (dports
.count
!= 0) {
133 ibuf
= skb_copy(buf
, GFP_ATOMIC
);
135 tipc_port_list_free(&dports
);
140 res
= tipc_bclink_send_msg(buf
);
141 if ((res
< 0) && (dports
.count
!= 0))
149 tipc_port_recv_mcast(ibuf
, &dports
);
151 tipc_port_list_free(&dports
);
157 * tipc_port_recv_mcast - deliver multicast message to all destination ports
159 * If there is no port list, perform a lookup to create one
161 void tipc_port_recv_mcast(struct sk_buff
*buf
, struct tipc_port_list
*dp
)
163 struct tipc_msg
*msg
;
164 struct tipc_port_list dports
= {0, NULL
, };
165 struct tipc_port_list
*item
= dp
;
170 /* Create destination port list, if one wasn't supplied */
172 tipc_nametbl_mc_translate(msg_nametype(msg
),
180 /* Deliver a copy of message to each destination port */
181 if (dp
->count
!= 0) {
182 msg_set_destnode(msg
, tipc_own_addr
);
183 if (dp
->count
== 1) {
184 msg_set_destport(msg
, dp
->ports
[0]);
185 tipc_port_recv_msg(buf
);
186 tipc_port_list_free(dp
);
189 for (; cnt
< dp
->count
; cnt
++) {
190 int index
= cnt
% PLSIZE
;
191 struct sk_buff
*b
= skb_clone(buf
, GFP_ATOMIC
);
194 pr_warn("Unable to deliver multicast message(s)\n");
197 if ((index
== 0) && (cnt
!= 0))
199 msg_set_destport(buf_msg(b
), item
->ports
[index
]);
200 tipc_port_recv_msg(b
);
205 tipc_port_list_free(dp
);
209 * tipc_createport_raw - create a generic TIPC port
211 * Returns pointer to (locked) TIPC port, or NULL if unable to create it
213 struct tipc_port
*tipc_createport_raw(void *usr_handle
,
214 u32 (*dispatcher
)(struct tipc_port
*, struct sk_buff
*),
215 void (*wakeup
)(struct tipc_port
*),
216 const u32 importance
)
218 struct tipc_port
*p_ptr
;
219 struct tipc_msg
*msg
;
222 p_ptr
= kzalloc(sizeof(*p_ptr
), GFP_ATOMIC
);
224 pr_warn("Port creation failed, no memory\n");
227 ref
= tipc_ref_acquire(p_ptr
, &p_ptr
->lock
);
229 pr_warn("Port creation failed, ref. table exhausted\n");
234 p_ptr
->usr_handle
= usr_handle
;
235 p_ptr
->max_pkt
= MAX_PKT_DEFAULT
;
237 INIT_LIST_HEAD(&p_ptr
->wait_list
);
238 INIT_LIST_HEAD(&p_ptr
->subscription
.nodesub_list
);
239 p_ptr
->dispatcher
= dispatcher
;
240 p_ptr
->wakeup
= wakeup
;
241 p_ptr
->user_port
= NULL
;
242 k_init_timer(&p_ptr
->timer
, (Handler
)port_timeout
, ref
);
243 INIT_LIST_HEAD(&p_ptr
->publications
);
244 INIT_LIST_HEAD(&p_ptr
->port_list
);
247 * Must hold port list lock while initializing message header template
248 * to ensure a change to node's own network address doesn't result
249 * in template containing out-dated network address information
251 spin_lock_bh(&tipc_port_list_lock
);
253 tipc_msg_init(msg
, importance
, TIPC_NAMED_MSG
, NAMED_H_SIZE
, 0);
254 msg_set_origport(msg
, ref
);
255 list_add_tail(&p_ptr
->port_list
, &ports
);
256 spin_unlock_bh(&tipc_port_list_lock
);
260 int tipc_deleteport(u32 ref
)
262 struct tipc_port
*p_ptr
;
263 struct sk_buff
*buf
= NULL
;
265 tipc_withdraw(ref
, 0, NULL
);
266 p_ptr
= tipc_port_lock(ref
);
270 tipc_ref_discard(ref
);
271 tipc_port_unlock(p_ptr
);
273 k_cancel_timer(&p_ptr
->timer
);
274 if (p_ptr
->connected
) {
275 buf
= port_build_peer_abort_msg(p_ptr
, TIPC_ERR_NO_PORT
);
276 tipc_nodesub_unsubscribe(&p_ptr
->subscription
);
278 kfree(p_ptr
->user_port
);
280 spin_lock_bh(&tipc_port_list_lock
);
281 list_del(&p_ptr
->port_list
);
282 list_del(&p_ptr
->wait_list
);
283 spin_unlock_bh(&tipc_port_list_lock
);
284 k_term_timer(&p_ptr
->timer
);
286 tipc_net_route_msg(buf
);
290 static int port_unreliable(struct tipc_port
*p_ptr
)
292 return msg_src_droppable(&p_ptr
->phdr
);
295 int tipc_portunreliable(u32 ref
, unsigned int *isunreliable
)
297 struct tipc_port
*p_ptr
;
299 p_ptr
= tipc_port_lock(ref
);
302 *isunreliable
= port_unreliable(p_ptr
);
303 tipc_port_unlock(p_ptr
);
307 int tipc_set_portunreliable(u32 ref
, unsigned int isunreliable
)
309 struct tipc_port
*p_ptr
;
311 p_ptr
= tipc_port_lock(ref
);
314 msg_set_src_droppable(&p_ptr
->phdr
, (isunreliable
!= 0));
315 tipc_port_unlock(p_ptr
);
319 static int port_unreturnable(struct tipc_port
*p_ptr
)
321 return msg_dest_droppable(&p_ptr
->phdr
);
324 int tipc_portunreturnable(u32 ref
, unsigned int *isunrejectable
)
326 struct tipc_port
*p_ptr
;
328 p_ptr
= tipc_port_lock(ref
);
331 *isunrejectable
= port_unreturnable(p_ptr
);
332 tipc_port_unlock(p_ptr
);
336 int tipc_set_portunreturnable(u32 ref
, unsigned int isunrejectable
)
338 struct tipc_port
*p_ptr
;
340 p_ptr
= tipc_port_lock(ref
);
343 msg_set_dest_droppable(&p_ptr
->phdr
, (isunrejectable
!= 0));
344 tipc_port_unlock(p_ptr
);
349 * port_build_proto_msg(): create connection protocol message for port
351 * On entry the port must be locked and connected.
353 static struct sk_buff
*port_build_proto_msg(struct tipc_port
*p_ptr
,
357 struct tipc_msg
*msg
;
359 buf
= tipc_buf_acquire(INT_H_SIZE
);
362 tipc_msg_init(msg
, CONN_MANAGER
, type
, INT_H_SIZE
,
363 port_peernode(p_ptr
));
364 msg_set_destport(msg
, port_peerport(p_ptr
));
365 msg_set_origport(msg
, p_ptr
->ref
);
366 msg_set_msgcnt(msg
, ack
);
371 int tipc_reject_msg(struct sk_buff
*buf
, u32 err
)
373 struct tipc_msg
*msg
= buf_msg(buf
);
374 struct sk_buff
*rbuf
;
375 struct tipc_msg
*rmsg
;
378 u32 data_sz
= msg_data_sz(msg
);
382 /* discard rejected message if it shouldn't be returned to sender */
383 if (WARN(!msg_isdata(msg
),
384 "attempt to reject message with user=%u", msg_user(msg
))) {
388 if (msg_errcode(msg
) || msg_dest_droppable(msg
))
392 * construct returned message by copying rejected message header and
393 * data (or subset), then updating header fields that need adjusting
395 hdr_sz
= msg_hdr_sz(msg
);
396 rmsg_sz
= hdr_sz
+ min_t(u32
, data_sz
, MAX_REJECT_SIZE
);
398 rbuf
= tipc_buf_acquire(rmsg_sz
);
402 rmsg
= buf_msg(rbuf
);
403 skb_copy_to_linear_data(rbuf
, msg
, rmsg_sz
);
405 if (msg_connected(rmsg
)) {
406 imp
= msg_importance(rmsg
);
407 if (imp
< TIPC_CRITICAL_IMPORTANCE
)
408 msg_set_importance(rmsg
, ++imp
);
410 msg_set_non_seq(rmsg
, 0);
411 msg_set_size(rmsg
, rmsg_sz
);
412 msg_set_errcode(rmsg
, err
);
413 msg_set_prevnode(rmsg
, tipc_own_addr
);
414 msg_swap_words(rmsg
, 4, 5);
415 if (!msg_short(rmsg
))
416 msg_swap_words(rmsg
, 6, 7);
418 /* send self-abort message when rejecting on a connected port */
419 if (msg_connected(msg
)) {
420 struct tipc_port
*p_ptr
= tipc_port_lock(msg_destport(msg
));
423 struct sk_buff
*abuf
= NULL
;
425 if (p_ptr
->connected
)
426 abuf
= port_build_self_abort_msg(p_ptr
, err
);
427 tipc_port_unlock(p_ptr
);
428 tipc_net_route_msg(abuf
);
432 /* send returned message & dispose of rejected message */
433 src_node
= msg_prevnode(msg
);
434 if (in_own_node(src_node
))
435 tipc_port_recv_msg(rbuf
);
437 tipc_link_send(rbuf
, src_node
, msg_link_selector(rmsg
));
443 int tipc_port_reject_sections(struct tipc_port
*p_ptr
, struct tipc_msg
*hdr
,
444 struct iovec
const *msg_sect
, u32 num_sect
,
445 unsigned int total_len
, int err
)
450 res
= tipc_msg_build(hdr
, msg_sect
, num_sect
, total_len
, MAX_MSG_SIZE
,
451 !p_ptr
->user_port
, &buf
);
455 return tipc_reject_msg(buf
, err
);
458 static void port_timeout(unsigned long ref
)
460 struct tipc_port
*p_ptr
= tipc_port_lock(ref
);
461 struct sk_buff
*buf
= NULL
;
466 if (!p_ptr
->connected
) {
467 tipc_port_unlock(p_ptr
);
471 /* Last probe answered ? */
472 if (p_ptr
->probing_state
== PROBING
) {
473 buf
= port_build_self_abort_msg(p_ptr
, TIPC_ERR_NO_PORT
);
475 buf
= port_build_proto_msg(p_ptr
, CONN_PROBE
, 0);
476 p_ptr
->probing_state
= PROBING
;
477 k_start_timer(&p_ptr
->timer
, p_ptr
->probing_interval
);
479 tipc_port_unlock(p_ptr
);
480 tipc_net_route_msg(buf
);
484 static void port_handle_node_down(unsigned long ref
)
486 struct tipc_port
*p_ptr
= tipc_port_lock(ref
);
487 struct sk_buff
*buf
= NULL
;
491 buf
= port_build_self_abort_msg(p_ptr
, TIPC_ERR_NO_NODE
);
492 tipc_port_unlock(p_ptr
);
493 tipc_net_route_msg(buf
);
497 static struct sk_buff
*port_build_self_abort_msg(struct tipc_port
*p_ptr
, u32 err
)
499 struct sk_buff
*buf
= port_build_peer_abort_msg(p_ptr
, err
);
502 struct tipc_msg
*msg
= buf_msg(buf
);
503 msg_swap_words(msg
, 4, 5);
504 msg_swap_words(msg
, 6, 7);
510 static struct sk_buff
*port_build_peer_abort_msg(struct tipc_port
*p_ptr
, u32 err
)
513 struct tipc_msg
*msg
;
516 if (!p_ptr
->connected
)
519 buf
= tipc_buf_acquire(BASIC_H_SIZE
);
522 memcpy(msg
, &p_ptr
->phdr
, BASIC_H_SIZE
);
523 msg_set_hdr_sz(msg
, BASIC_H_SIZE
);
524 msg_set_size(msg
, BASIC_H_SIZE
);
525 imp
= msg_importance(msg
);
526 if (imp
< TIPC_CRITICAL_IMPORTANCE
)
527 msg_set_importance(msg
, ++imp
);
528 msg_set_errcode(msg
, err
);
533 void tipc_port_recv_proto_msg(struct sk_buff
*buf
)
535 struct tipc_msg
*msg
= buf_msg(buf
);
536 struct tipc_port
*p_ptr
;
537 struct sk_buff
*r_buf
= NULL
;
538 u32 destport
= msg_destport(msg
);
541 /* Validate connection */
542 p_ptr
= tipc_port_lock(destport
);
543 if (!p_ptr
|| !p_ptr
->connected
|| !tipc_port_peer_msg(p_ptr
, msg
)) {
544 r_buf
= tipc_buf_acquire(BASIC_H_SIZE
);
546 msg
= buf_msg(r_buf
);
547 tipc_msg_init(msg
, TIPC_HIGH_IMPORTANCE
, TIPC_CONN_MSG
,
548 BASIC_H_SIZE
, msg_orignode(msg
));
549 msg_set_errcode(msg
, TIPC_ERR_NO_PORT
);
550 msg_set_origport(msg
, destport
);
551 msg_set_destport(msg
, msg_origport(msg
));
554 tipc_port_unlock(p_ptr
);
558 /* Process protocol message sent by peer */
559 switch (msg_type(msg
)) {
561 wakeable
= tipc_port_congested(p_ptr
) && p_ptr
->congested
&&
563 p_ptr
->acked
+= msg_msgcnt(msg
);
564 if (!tipc_port_congested(p_ptr
)) {
565 p_ptr
->congested
= 0;
567 p_ptr
->wakeup(p_ptr
);
571 r_buf
= port_build_proto_msg(p_ptr
, CONN_PROBE_REPLY
, 0);
574 /* CONN_PROBE_REPLY or unrecognized - no action required */
577 p_ptr
->probing_state
= CONFIRMED
;
578 tipc_port_unlock(p_ptr
);
580 tipc_net_route_msg(r_buf
);
584 static int port_print(struct tipc_port
*p_ptr
, char *buf
, int len
, int full_id
)
586 struct publication
*publ
;
590 ret
= tipc_snprintf(buf
, len
, "<%u.%u.%u:%u>:",
591 tipc_zone(tipc_own_addr
),
592 tipc_cluster(tipc_own_addr
),
593 tipc_node(tipc_own_addr
), p_ptr
->ref
);
595 ret
= tipc_snprintf(buf
, len
, "%-10u:", p_ptr
->ref
);
597 if (p_ptr
->connected
) {
598 u32 dport
= port_peerport(p_ptr
);
599 u32 destnode
= port_peernode(p_ptr
);
601 ret
+= tipc_snprintf(buf
+ ret
, len
- ret
,
602 " connected to <%u.%u.%u:%u>",
604 tipc_cluster(destnode
),
605 tipc_node(destnode
), dport
);
606 if (p_ptr
->conn_type
!= 0)
607 ret
+= tipc_snprintf(buf
+ ret
, len
- ret
,
608 " via {%u,%u}", p_ptr
->conn_type
,
609 p_ptr
->conn_instance
);
610 } else if (p_ptr
->published
) {
611 ret
+= tipc_snprintf(buf
+ ret
, len
- ret
, " bound to");
612 list_for_each_entry(publ
, &p_ptr
->publications
, pport_list
) {
613 if (publ
->lower
== publ
->upper
)
614 ret
+= tipc_snprintf(buf
+ ret
, len
- ret
,
615 " {%u,%u}", publ
->type
,
618 ret
+= tipc_snprintf(buf
+ ret
, len
- ret
,
619 " {%u,%u,%u}", publ
->type
,
620 publ
->lower
, publ
->upper
);
623 ret
+= tipc_snprintf(buf
+ ret
, len
- ret
, "\n");
627 struct sk_buff
*tipc_port_get_ports(void)
630 struct tlv_desc
*rep_tlv
;
633 struct tipc_port
*p_ptr
;
636 buf
= tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN
));
639 rep_tlv
= (struct tlv_desc
*)buf
->data
;
640 pb
= TLV_DATA(rep_tlv
);
641 pb_len
= ULTRA_STRING_MAX_LEN
;
643 spin_lock_bh(&tipc_port_list_lock
);
644 list_for_each_entry(p_ptr
, &ports
, port_list
) {
645 spin_lock_bh(p_ptr
->lock
);
646 str_len
+= port_print(p_ptr
, pb
, pb_len
, 0);
647 spin_unlock_bh(p_ptr
->lock
);
649 spin_unlock_bh(&tipc_port_list_lock
);
650 str_len
+= 1; /* for "\0" */
651 skb_put(buf
, TLV_SPACE(str_len
));
652 TLV_SET(rep_tlv
, TIPC_TLV_ULTRA_STRING
, NULL
, str_len
);
657 void tipc_port_reinit(void)
659 struct tipc_port
*p_ptr
;
660 struct tipc_msg
*msg
;
662 spin_lock_bh(&tipc_port_list_lock
);
663 list_for_each_entry(p_ptr
, &ports
, port_list
) {
665 msg_set_prevnode(msg
, tipc_own_addr
);
666 msg_set_orignode(msg
, tipc_own_addr
);
668 spin_unlock_bh(&tipc_port_list_lock
);
673 * port_dispatcher_sigh(): Signal handler for messages destinated
674 * to the tipc_port interface.
676 static void port_dispatcher_sigh(void *dummy
)
680 spin_lock_bh(&queue_lock
);
681 buf
= msg_queue_head
;
682 msg_queue_head
= NULL
;
683 spin_unlock_bh(&queue_lock
);
686 struct tipc_port
*p_ptr
;
687 struct user_port
*up_ptr
;
688 struct tipc_portid orig
;
689 struct tipc_name_seq dseq
;
696 struct sk_buff
*next
= buf
->next
;
697 struct tipc_msg
*msg
= buf_msg(buf
);
698 u32 dref
= msg_destport(msg
);
700 message_type
= msg_type(msg
);
701 if (message_type
> TIPC_DIRECT_MSG
)
702 goto reject
; /* Unsupported message type */
704 p_ptr
= tipc_port_lock(dref
);
706 goto reject
; /* Port deleted while msg in queue */
708 orig
.ref
= msg_origport(msg
);
709 orig
.node
= msg_orignode(msg
);
710 up_ptr
= p_ptr
->user_port
;
711 usr_handle
= up_ptr
->usr_handle
;
712 connected
= p_ptr
->connected
;
713 peer_invalid
= connected
&& !tipc_port_peer_msg(p_ptr
, msg
);
714 published
= p_ptr
->published
;
716 if (unlikely(msg_errcode(msg
)))
719 switch (message_type
) {
722 tipc_conn_msg_event cb
= up_ptr
->conn_msg_cb
;
725 tipc_port_unlock(p_ptr
);
728 if (unlikely(!connected
)) {
729 if (tipc_connect2port(dref
, &orig
))
731 } else if (peer_invalid
)
733 dsz
= msg_data_sz(msg
);
735 (++p_ptr
->conn_unacked
>=
736 TIPC_FLOW_CONTROL_WIN
)))
737 tipc_acknowledge(dref
,
738 p_ptr
->conn_unacked
);
739 skb_pull(buf
, msg_hdr_sz(msg
));
740 cb(usr_handle
, dref
, &buf
, msg_data(msg
), dsz
);
743 case TIPC_DIRECT_MSG
:{
744 tipc_msg_event cb
= up_ptr
->msg_cb
;
746 tipc_port_unlock(p_ptr
);
747 if (unlikely(!cb
|| connected
))
749 skb_pull(buf
, msg_hdr_sz(msg
));
750 cb(usr_handle
, dref
, &buf
, msg_data(msg
),
751 msg_data_sz(msg
), msg_importance(msg
),
756 case TIPC_NAMED_MSG
:{
757 tipc_named_msg_event cb
= up_ptr
->named_msg_cb
;
759 tipc_port_unlock(p_ptr
);
760 if (unlikely(!cb
|| connected
|| !published
))
762 dseq
.type
= msg_nametype(msg
);
763 dseq
.lower
= msg_nameinst(msg
);
764 dseq
.upper
= (message_type
== TIPC_NAMED_MSG
)
765 ? dseq
.lower
: msg_nameupper(msg
);
766 skb_pull(buf
, msg_hdr_sz(msg
));
767 cb(usr_handle
, dref
, &buf
, msg_data(msg
),
768 msg_data_sz(msg
), msg_importance(msg
),
778 switch (message_type
) {
781 tipc_conn_shutdown_event cb
=
784 tipc_port_unlock(p_ptr
);
785 if (!cb
|| !connected
|| peer_invalid
)
787 tipc_disconnect(dref
);
788 skb_pull(buf
, msg_hdr_sz(msg
));
789 cb(usr_handle
, dref
, &buf
, msg_data(msg
),
790 msg_data_sz(msg
), msg_errcode(msg
));
793 case TIPC_DIRECT_MSG
:{
794 tipc_msg_err_event cb
= up_ptr
->err_cb
;
796 tipc_port_unlock(p_ptr
);
797 if (!cb
|| connected
)
799 skb_pull(buf
, msg_hdr_sz(msg
));
800 cb(usr_handle
, dref
, &buf
, msg_data(msg
),
801 msg_data_sz(msg
), msg_errcode(msg
), &orig
);
805 case TIPC_NAMED_MSG
:{
806 tipc_named_msg_err_event cb
=
807 up_ptr
->named_err_cb
;
809 tipc_port_unlock(p_ptr
);
810 if (!cb
|| connected
)
812 dseq
.type
= msg_nametype(msg
);
813 dseq
.lower
= msg_nameinst(msg
);
814 dseq
.upper
= (message_type
== TIPC_NAMED_MSG
)
815 ? dseq
.lower
: msg_nameupper(msg
);
816 skb_pull(buf
, msg_hdr_sz(msg
));
817 cb(usr_handle
, dref
, &buf
, msg_data(msg
),
818 msg_data_sz(msg
), msg_errcode(msg
), &dseq
);
827 tipc_reject_msg(buf
, TIPC_ERR_NO_PORT
);
833 * port_dispatcher(): Dispatcher for messages destinated
834 * to the tipc_port interface. Called with port locked.
836 static u32
port_dispatcher(struct tipc_port
*dummy
, struct sk_buff
*buf
)
839 spin_lock_bh(&queue_lock
);
840 if (msg_queue_head
) {
841 msg_queue_tail
->next
= buf
;
842 msg_queue_tail
= buf
;
844 msg_queue_tail
= msg_queue_head
= buf
;
845 tipc_k_signal((Handler
)port_dispatcher_sigh
, 0);
847 spin_unlock_bh(&queue_lock
);
852 * Wake up port after congestion: Called with port locked
854 static void port_wakeup_sh(unsigned long ref
)
856 struct tipc_port
*p_ptr
;
857 struct user_port
*up_ptr
;
858 tipc_continue_event cb
= NULL
;
861 p_ptr
= tipc_port_lock(ref
);
863 up_ptr
= p_ptr
->user_port
;
865 cb
= up_ptr
->continue_event_cb
;
866 uh
= up_ptr
->usr_handle
;
868 tipc_port_unlock(p_ptr
);
875 static void port_wakeup(struct tipc_port
*p_ptr
)
877 tipc_k_signal((Handler
)port_wakeup_sh
, p_ptr
->ref
);
880 void tipc_acknowledge(u32 ref
, u32 ack
)
882 struct tipc_port
*p_ptr
;
883 struct sk_buff
*buf
= NULL
;
885 p_ptr
= tipc_port_lock(ref
);
888 if (p_ptr
->connected
) {
889 p_ptr
->conn_unacked
-= ack
;
890 buf
= port_build_proto_msg(p_ptr
, CONN_ACK
, ack
);
892 tipc_port_unlock(p_ptr
);
893 tipc_net_route_msg(buf
);
897 * tipc_createport(): user level call.
899 int tipc_createport(void *usr_handle
,
900 unsigned int importance
,
901 tipc_msg_err_event error_cb
,
902 tipc_named_msg_err_event named_error_cb
,
903 tipc_conn_shutdown_event conn_error_cb
,
904 tipc_msg_event msg_cb
,
905 tipc_named_msg_event named_msg_cb
,
906 tipc_conn_msg_event conn_msg_cb
,
907 tipc_continue_event continue_event_cb
, /* May be zero */
910 struct user_port
*up_ptr
;
911 struct tipc_port
*p_ptr
;
913 up_ptr
= kmalloc(sizeof(*up_ptr
), GFP_ATOMIC
);
915 pr_warn("Port creation failed, no memory\n");
918 p_ptr
= tipc_createport_raw(NULL
, port_dispatcher
, port_wakeup
,
925 p_ptr
->user_port
= up_ptr
;
926 up_ptr
->usr_handle
= usr_handle
;
927 up_ptr
->ref
= p_ptr
->ref
;
928 up_ptr
->err_cb
= error_cb
;
929 up_ptr
->named_err_cb
= named_error_cb
;
930 up_ptr
->conn_err_cb
= conn_error_cb
;
931 up_ptr
->msg_cb
= msg_cb
;
932 up_ptr
->named_msg_cb
= named_msg_cb
;
933 up_ptr
->conn_msg_cb
= conn_msg_cb
;
934 up_ptr
->continue_event_cb
= continue_event_cb
;
935 *portref
= p_ptr
->ref
;
936 tipc_port_unlock(p_ptr
);
940 int tipc_portimportance(u32 ref
, unsigned int *importance
)
942 struct tipc_port
*p_ptr
;
944 p_ptr
= tipc_port_lock(ref
);
947 *importance
= (unsigned int)msg_importance(&p_ptr
->phdr
);
948 tipc_port_unlock(p_ptr
);
952 int tipc_set_portimportance(u32 ref
, unsigned int imp
)
954 struct tipc_port
*p_ptr
;
956 if (imp
> TIPC_CRITICAL_IMPORTANCE
)
959 p_ptr
= tipc_port_lock(ref
);
962 msg_set_importance(&p_ptr
->phdr
, (u32
)imp
);
963 tipc_port_unlock(p_ptr
);
968 int tipc_publish(u32 ref
, unsigned int scope
, struct tipc_name_seq
const *seq
)
970 struct tipc_port
*p_ptr
;
971 struct publication
*publ
;
975 p_ptr
= tipc_port_lock(ref
);
979 if (p_ptr
->connected
)
981 key
= ref
+ p_ptr
->pub_count
+ 1;
986 publ
= tipc_nametbl_publish(seq
->type
, seq
->lower
, seq
->upper
,
987 scope
, p_ptr
->ref
, key
);
989 list_add(&publ
->pport_list
, &p_ptr
->publications
);
991 p_ptr
->published
= 1;
995 tipc_port_unlock(p_ptr
);
999 int tipc_withdraw(u32 ref
, unsigned int scope
, struct tipc_name_seq
const *seq
)
1001 struct tipc_port
*p_ptr
;
1002 struct publication
*publ
;
1003 struct publication
*tpubl
;
1006 p_ptr
= tipc_port_lock(ref
);
1010 list_for_each_entry_safe(publ
, tpubl
,
1011 &p_ptr
->publications
, pport_list
) {
1012 tipc_nametbl_withdraw(publ
->type
, publ
->lower
,
1013 publ
->ref
, publ
->key
);
1017 list_for_each_entry_safe(publ
, tpubl
,
1018 &p_ptr
->publications
, pport_list
) {
1019 if (publ
->scope
!= scope
)
1021 if (publ
->type
!= seq
->type
)
1023 if (publ
->lower
!= seq
->lower
)
1025 if (publ
->upper
!= seq
->upper
)
1027 tipc_nametbl_withdraw(publ
->type
, publ
->lower
,
1028 publ
->ref
, publ
->key
);
1033 if (list_empty(&p_ptr
->publications
))
1034 p_ptr
->published
= 0;
1035 tipc_port_unlock(p_ptr
);
1039 int tipc_connect2port(u32 ref
, struct tipc_portid
const *peer
)
1041 struct tipc_port
*p_ptr
;
1042 struct tipc_msg
*msg
;
1045 p_ptr
= tipc_port_lock(ref
);
1048 if (p_ptr
->published
|| p_ptr
->connected
)
1054 msg_set_destnode(msg
, peer
->node
);
1055 msg_set_destport(msg
, peer
->ref
);
1056 msg_set_type(msg
, TIPC_CONN_MSG
);
1057 msg_set_lookup_scope(msg
, 0);
1058 msg_set_hdr_sz(msg
, SHORT_H_SIZE
);
1060 p_ptr
->probing_interval
= PROBING_INTERVAL
;
1061 p_ptr
->probing_state
= CONFIRMED
;
1062 p_ptr
->connected
= 1;
1063 k_start_timer(&p_ptr
->timer
, p_ptr
->probing_interval
);
1065 tipc_nodesub_subscribe(&p_ptr
->subscription
, peer
->node
,
1066 (void *)(unsigned long)ref
,
1067 (net_ev_handler
)port_handle_node_down
);
1070 tipc_port_unlock(p_ptr
);
1071 p_ptr
->max_pkt
= tipc_link_get_max_pkt(peer
->node
, ref
);
1076 * tipc_disconnect_port - disconnect port from peer
1078 * Port must be locked.
1080 int tipc_disconnect_port(struct tipc_port
*tp_ptr
)
1084 if (tp_ptr
->connected
) {
1085 tp_ptr
->connected
= 0;
1086 /* let timer expire on it's own to avoid deadlock! */
1087 tipc_nodesub_unsubscribe(&tp_ptr
->subscription
);
1096 * tipc_disconnect(): Disconnect port form peer.
1097 * This is a node local operation.
1099 int tipc_disconnect(u32 ref
)
1101 struct tipc_port
*p_ptr
;
1104 p_ptr
= tipc_port_lock(ref
);
1107 res
= tipc_disconnect_port(p_ptr
);
1108 tipc_port_unlock(p_ptr
);
1113 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1115 int tipc_shutdown(u32 ref
)
1117 struct tipc_port
*p_ptr
;
1118 struct sk_buff
*buf
= NULL
;
1120 p_ptr
= tipc_port_lock(ref
);
1124 buf
= port_build_peer_abort_msg(p_ptr
, TIPC_CONN_SHUTDOWN
);
1125 tipc_port_unlock(p_ptr
);
1126 tipc_net_route_msg(buf
);
1127 return tipc_disconnect(ref
);
1131 * tipc_port_recv_msg - receive message from lower layer and deliver to port user
1133 int tipc_port_recv_msg(struct sk_buff
*buf
)
1135 struct tipc_port
*p_ptr
;
1136 struct tipc_msg
*msg
= buf_msg(buf
);
1137 u32 destport
= msg_destport(msg
);
1138 u32 dsz
= msg_data_sz(msg
);
1141 /* forward unresolved named message */
1142 if (unlikely(!destport
)) {
1143 tipc_net_route_msg(buf
);
1147 /* validate destination & pass to port, otherwise reject message */
1148 p_ptr
= tipc_port_lock(destport
);
1149 if (likely(p_ptr
)) {
1150 err
= p_ptr
->dispatcher(p_ptr
, buf
);
1151 tipc_port_unlock(p_ptr
);
1155 err
= TIPC_ERR_NO_PORT
;
1158 return tipc_reject_msg(buf
, err
);
1162 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1163 * message for this node.
1165 static int tipc_port_recv_sections(struct tipc_port
*sender
, unsigned int num_sect
,
1166 struct iovec
const *msg_sect
,
1167 unsigned int total_len
)
1169 struct sk_buff
*buf
;
1172 res
= tipc_msg_build(&sender
->phdr
, msg_sect
, num_sect
, total_len
,
1173 MAX_MSG_SIZE
, !sender
->user_port
, &buf
);
1175 tipc_port_recv_msg(buf
);
1180 * tipc_send - send message sections on connection
1182 int tipc_send(u32 ref
, unsigned int num_sect
, struct iovec
const *msg_sect
,
1183 unsigned int total_len
)
1185 struct tipc_port
*p_ptr
;
1189 p_ptr
= tipc_port_deref(ref
);
1190 if (!p_ptr
|| !p_ptr
->connected
)
1193 p_ptr
->congested
= 1;
1194 if (!tipc_port_congested(p_ptr
)) {
1195 destnode
= port_peernode(p_ptr
);
1196 if (likely(!in_own_node(destnode
)))
1197 res
= tipc_link_send_sections_fast(p_ptr
, msg_sect
, num_sect
,
1198 total_len
, destnode
);
1200 res
= tipc_port_recv_sections(p_ptr
, num_sect
, msg_sect
,
1203 if (likely(res
!= -ELINKCONG
)) {
1204 p_ptr
->congested
= 0;
1210 if (port_unreliable(p_ptr
)) {
1211 p_ptr
->congested
= 0;
1218 * tipc_send2name - send message sections to port name
1220 int tipc_send2name(u32 ref
, struct tipc_name
const *name
, unsigned int domain
,
1221 unsigned int num_sect
, struct iovec
const *msg_sect
,
1222 unsigned int total_len
)
1224 struct tipc_port
*p_ptr
;
1225 struct tipc_msg
*msg
;
1226 u32 destnode
= domain
;
1230 p_ptr
= tipc_port_deref(ref
);
1231 if (!p_ptr
|| p_ptr
->connected
)
1235 msg_set_type(msg
, TIPC_NAMED_MSG
);
1236 msg_set_hdr_sz(msg
, NAMED_H_SIZE
);
1237 msg_set_nametype(msg
, name
->type
);
1238 msg_set_nameinst(msg
, name
->instance
);
1239 msg_set_lookup_scope(msg
, tipc_addr_scope(domain
));
1240 destport
= tipc_nametbl_translate(name
->type
, name
->instance
, &destnode
);
1241 msg_set_destnode(msg
, destnode
);
1242 msg_set_destport(msg
, destport
);
1244 if (likely(destport
|| destnode
)) {
1245 if (likely(in_own_node(destnode
)))
1246 res
= tipc_port_recv_sections(p_ptr
, num_sect
,
1247 msg_sect
, total_len
);
1248 else if (tipc_own_addr
)
1249 res
= tipc_link_send_sections_fast(p_ptr
, msg_sect
,
1250 num_sect
, total_len
,
1253 res
= tipc_port_reject_sections(p_ptr
, msg
, msg_sect
,
1254 num_sect
, total_len
,
1256 if (likely(res
!= -ELINKCONG
)) {
1261 if (port_unreliable(p_ptr
)) {
1266 return tipc_port_reject_sections(p_ptr
, msg
, msg_sect
, num_sect
,
1267 total_len
, TIPC_ERR_NO_NAME
);
1271 * tipc_send2port - send message sections to port identity
1273 int tipc_send2port(u32 ref
, struct tipc_portid
const *dest
,
1274 unsigned int num_sect
, struct iovec
const *msg_sect
,
1275 unsigned int total_len
)
1277 struct tipc_port
*p_ptr
;
1278 struct tipc_msg
*msg
;
1281 p_ptr
= tipc_port_deref(ref
);
1282 if (!p_ptr
|| p_ptr
->connected
)
1286 msg_set_type(msg
, TIPC_DIRECT_MSG
);
1287 msg_set_lookup_scope(msg
, 0);
1288 msg_set_destnode(msg
, dest
->node
);
1289 msg_set_destport(msg
, dest
->ref
);
1290 msg_set_hdr_sz(msg
, BASIC_H_SIZE
);
1292 if (in_own_node(dest
->node
))
1293 res
= tipc_port_recv_sections(p_ptr
, num_sect
, msg_sect
,
1295 else if (tipc_own_addr
)
1296 res
= tipc_link_send_sections_fast(p_ptr
, msg_sect
, num_sect
,
1297 total_len
, dest
->node
);
1299 res
= tipc_port_reject_sections(p_ptr
, msg
, msg_sect
, num_sect
,
1300 total_len
, TIPC_ERR_NO_NODE
);
1301 if (likely(res
!= -ELINKCONG
)) {
1306 if (port_unreliable(p_ptr
)) {
1313 * tipc_send_buf2port - send message buffer to port identity
1315 int tipc_send_buf2port(u32 ref
, struct tipc_portid
const *dest
,
1316 struct sk_buff
*buf
, unsigned int dsz
)
1318 struct tipc_port
*p_ptr
;
1319 struct tipc_msg
*msg
;
1322 p_ptr
= (struct tipc_port
*)tipc_ref_deref(ref
);
1323 if (!p_ptr
|| p_ptr
->connected
)
1327 msg_set_type(msg
, TIPC_DIRECT_MSG
);
1328 msg_set_destnode(msg
, dest
->node
);
1329 msg_set_destport(msg
, dest
->ref
);
1330 msg_set_hdr_sz(msg
, BASIC_H_SIZE
);
1331 msg_set_size(msg
, BASIC_H_SIZE
+ dsz
);
1332 if (skb_cow(buf
, BASIC_H_SIZE
))
1335 skb_push(buf
, BASIC_H_SIZE
);
1336 skb_copy_to_linear_data(buf
, msg
, BASIC_H_SIZE
);
1338 if (in_own_node(dest
->node
))
1339 res
= tipc_port_recv_msg(buf
);
1341 res
= tipc_send_buf_fast(buf
, dest
->node
);
1342 if (likely(res
!= -ELINKCONG
)) {
1347 if (port_unreliable(p_ptr
))