2 * net/tipc/port.c: TIPC port code
4 * Copyright (c) 1992-2007, Ericsson AB
5 * Copyright (c) 2004-2008, 2010-2013, 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
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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 DEFINE_SPINLOCK(tipc_port_list_lock);
51 static LIST_HEAD(ports);
52 static void port_handle_node_down(unsigned long ref);
53 static struct sk_buff *port_build_self_abort_msg(struct tipc_port *, u32 err);
54 static struct sk_buff *port_build_peer_abort_msg(struct tipc_port *, u32 err);
55 static void port_timeout(unsigned long ref);
58 static u32 port_peernode(struct tipc_port *p_ptr)
60 return msg_destnode(&p_ptr->phdr);
63 static u32 port_peerport(struct tipc_port *p_ptr)
65 return msg_destport(&p_ptr->phdr);
69 * tipc_port_peer_msg - verify message was sent by connected port's peer
71 * Handles cases where the node's network address has changed from
72 * the default of <0.0.0> to its configured setting.
74 int tipc_port_peer_msg(struct tipc_port *p_ptr, struct tipc_msg *msg)
79 if (msg_origport(msg) != port_peerport(p_ptr))
82 orignode = msg_orignode(msg);
83 peernode = port_peernode(p_ptr);
84 return (orignode == peernode) ||
85 (!orignode && (peernode == tipc_own_addr)) ||
86 (!peernode && (orignode == tipc_own_addr));
90 * tipc_multicast - send a multicast message to local and remote destinations
92 int tipc_multicast(u32 ref, struct tipc_name_seq const *seq,
93 struct iovec const *msg_sect, unsigned int len)
97 struct sk_buff *ibuf = NULL;
98 struct tipc_port_list dports = {0, NULL, };
99 struct tipc_port *oport = tipc_port_deref(ref);
103 if (unlikely(!oport))
106 /* Create multicast message */
108 msg_set_type(hdr, TIPC_MCAST_MSG);
109 msg_set_lookup_scope(hdr, TIPC_CLUSTER_SCOPE);
110 msg_set_destport(hdr, 0);
111 msg_set_destnode(hdr, 0);
112 msg_set_nametype(hdr, seq->type);
113 msg_set_namelower(hdr, seq->lower);
114 msg_set_nameupper(hdr, seq->upper);
115 msg_set_hdr_sz(hdr, MCAST_H_SIZE);
116 res = tipc_msg_build(hdr, msg_sect, len, MAX_MSG_SIZE, &buf);
120 /* Figure out where to send multicast message */
121 ext_targets = tipc_nametbl_mc_translate(seq->type, seq->lower, seq->upper,
122 TIPC_NODE_SCOPE, &dports);
124 /* Send message to destinations (duplicate it only if necessary) */
126 if (dports.count != 0) {
127 ibuf = skb_copy(buf, GFP_ATOMIC);
129 tipc_port_list_free(&dports);
134 res = tipc_bclink_send_msg(buf);
135 if ((res < 0) && (dports.count != 0))
143 tipc_port_recv_mcast(ibuf, &dports);
145 tipc_port_list_free(&dports);
151 * tipc_port_recv_mcast - deliver multicast message to all destination ports
153 * If there is no port list, perform a lookup to create one
155 void tipc_port_recv_mcast(struct sk_buff *buf, struct tipc_port_list *dp)
157 struct tipc_msg *msg;
158 struct tipc_port_list dports = {0, NULL, };
159 struct tipc_port_list *item = dp;
164 /* Create destination port list, if one wasn't supplied */
166 tipc_nametbl_mc_translate(msg_nametype(msg),
174 /* Deliver a copy of message to each destination port */
175 if (dp->count != 0) {
176 msg_set_destnode(msg, tipc_own_addr);
177 if (dp->count == 1) {
178 msg_set_destport(msg, dp->ports[0]);
179 tipc_port_recv_msg(buf);
180 tipc_port_list_free(dp);
183 for (; cnt < dp->count; cnt++) {
184 int index = cnt % PLSIZE;
185 struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
188 pr_warn("Unable to deliver multicast message(s)\n");
191 if ((index == 0) && (cnt != 0))
193 msg_set_destport(buf_msg(b), item->ports[index]);
194 tipc_port_recv_msg(b);
199 tipc_port_list_free(dp);
203 * tipc_createport - create a generic TIPC port
205 * Returns pointer to (locked) TIPC port, or NULL if unable to create it
207 struct tipc_port *tipc_createport(struct sock *sk,
208 u32 (*dispatcher)(struct tipc_port *,
210 void (*wakeup)(struct tipc_port *),
211 const u32 importance)
213 struct tipc_port *p_ptr;
214 struct tipc_msg *msg;
217 p_ptr = kzalloc(sizeof(*p_ptr), GFP_ATOMIC);
219 pr_warn("Port creation failed, no memory\n");
222 ref = tipc_ref_acquire(p_ptr, &p_ptr->lock);
224 pr_warn("Port creation failed, ref. table exhausted\n");
230 p_ptr->max_pkt = MAX_PKT_DEFAULT;
232 INIT_LIST_HEAD(&p_ptr->wait_list);
233 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
234 p_ptr->dispatcher = dispatcher;
235 p_ptr->wakeup = wakeup;
236 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
237 INIT_LIST_HEAD(&p_ptr->publications);
238 INIT_LIST_HEAD(&p_ptr->port_list);
241 * Must hold port list lock while initializing message header template
242 * to ensure a change to node's own network address doesn't result
243 * in template containing out-dated network address information
245 spin_lock_bh(&tipc_port_list_lock);
247 tipc_msg_init(msg, importance, TIPC_NAMED_MSG, NAMED_H_SIZE, 0);
248 msg_set_origport(msg, ref);
249 list_add_tail(&p_ptr->port_list, &ports);
250 spin_unlock_bh(&tipc_port_list_lock);
254 int tipc_deleteport(struct tipc_port *p_ptr)
256 struct sk_buff *buf = NULL;
258 tipc_withdraw(p_ptr, 0, NULL);
260 spin_lock_bh(p_ptr->lock);
261 tipc_ref_discard(p_ptr->ref);
262 spin_unlock_bh(p_ptr->lock);
264 k_cancel_timer(&p_ptr->timer);
265 if (p_ptr->connected) {
266 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
267 tipc_nodesub_unsubscribe(&p_ptr->subscription);
270 spin_lock_bh(&tipc_port_list_lock);
271 list_del(&p_ptr->port_list);
272 list_del(&p_ptr->wait_list);
273 spin_unlock_bh(&tipc_port_list_lock);
274 k_term_timer(&p_ptr->timer);
276 tipc_net_route_msg(buf);
280 static int port_unreliable(struct tipc_port *p_ptr)
282 return msg_src_droppable(&p_ptr->phdr);
285 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
287 struct tipc_port *p_ptr;
289 p_ptr = tipc_port_lock(ref);
292 *isunreliable = port_unreliable(p_ptr);
293 tipc_port_unlock(p_ptr);
297 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
299 struct tipc_port *p_ptr;
301 p_ptr = tipc_port_lock(ref);
304 msg_set_src_droppable(&p_ptr->phdr, (isunreliable != 0));
305 tipc_port_unlock(p_ptr);
309 static int port_unreturnable(struct tipc_port *p_ptr)
311 return msg_dest_droppable(&p_ptr->phdr);
314 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
316 struct tipc_port *p_ptr;
318 p_ptr = tipc_port_lock(ref);
321 *isunrejectable = port_unreturnable(p_ptr);
322 tipc_port_unlock(p_ptr);
326 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
328 struct tipc_port *p_ptr;
330 p_ptr = tipc_port_lock(ref);
333 msg_set_dest_droppable(&p_ptr->phdr, (isunrejectable != 0));
334 tipc_port_unlock(p_ptr);
339 * port_build_proto_msg(): create connection protocol message for port
341 * On entry the port must be locked and connected.
343 static struct sk_buff *port_build_proto_msg(struct tipc_port *p_ptr,
347 struct tipc_msg *msg;
349 buf = tipc_buf_acquire(INT_H_SIZE);
352 tipc_msg_init(msg, CONN_MANAGER, type, INT_H_SIZE,
353 port_peernode(p_ptr));
354 msg_set_destport(msg, port_peerport(p_ptr));
355 msg_set_origport(msg, p_ptr->ref);
356 msg_set_msgcnt(msg, ack);
361 int tipc_reject_msg(struct sk_buff *buf, u32 err)
363 struct tipc_msg *msg = buf_msg(buf);
364 struct sk_buff *rbuf;
365 struct tipc_msg *rmsg;
368 u32 data_sz = msg_data_sz(msg);
372 /* discard rejected message if it shouldn't be returned to sender */
373 if (WARN(!msg_isdata(msg),
374 "attempt to reject message with user=%u", msg_user(msg))) {
378 if (msg_errcode(msg) || msg_dest_droppable(msg))
382 * construct returned message by copying rejected message header and
383 * data (or subset), then updating header fields that need adjusting
385 hdr_sz = msg_hdr_sz(msg);
386 rmsg_sz = hdr_sz + min_t(u32, data_sz, MAX_REJECT_SIZE);
388 rbuf = tipc_buf_acquire(rmsg_sz);
392 rmsg = buf_msg(rbuf);
393 skb_copy_to_linear_data(rbuf, msg, rmsg_sz);
395 if (msg_connected(rmsg)) {
396 imp = msg_importance(rmsg);
397 if (imp < TIPC_CRITICAL_IMPORTANCE)
398 msg_set_importance(rmsg, ++imp);
400 msg_set_non_seq(rmsg, 0);
401 msg_set_size(rmsg, rmsg_sz);
402 msg_set_errcode(rmsg, err);
403 msg_set_prevnode(rmsg, tipc_own_addr);
404 msg_swap_words(rmsg, 4, 5);
405 if (!msg_short(rmsg))
406 msg_swap_words(rmsg, 6, 7);
408 /* send self-abort message when rejecting on a connected port */
409 if (msg_connected(msg)) {
410 struct tipc_port *p_ptr = tipc_port_lock(msg_destport(msg));
413 struct sk_buff *abuf = NULL;
415 if (p_ptr->connected)
416 abuf = port_build_self_abort_msg(p_ptr, err);
417 tipc_port_unlock(p_ptr);
418 tipc_net_route_msg(abuf);
422 /* send returned message & dispose of rejected message */
423 src_node = msg_prevnode(msg);
424 if (in_own_node(src_node))
425 tipc_port_recv_msg(rbuf);
427 tipc_link_send(rbuf, src_node, msg_link_selector(rmsg));
433 int tipc_port_reject_sections(struct tipc_port *p_ptr, struct tipc_msg *hdr,
434 struct iovec const *msg_sect, unsigned int len,
440 res = tipc_msg_build(hdr, msg_sect, len, MAX_MSG_SIZE, &buf);
444 return tipc_reject_msg(buf, err);
447 static void port_timeout(unsigned long ref)
449 struct tipc_port *p_ptr = tipc_port_lock(ref);
450 struct sk_buff *buf = NULL;
455 if (!p_ptr->connected) {
456 tipc_port_unlock(p_ptr);
460 /* Last probe answered ? */
461 if (p_ptr->probing_state == PROBING) {
462 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
464 buf = port_build_proto_msg(p_ptr, CONN_PROBE, 0);
465 p_ptr->probing_state = PROBING;
466 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
468 tipc_port_unlock(p_ptr);
469 tipc_net_route_msg(buf);
473 static void port_handle_node_down(unsigned long ref)
475 struct tipc_port *p_ptr = tipc_port_lock(ref);
476 struct sk_buff *buf = NULL;
480 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
481 tipc_port_unlock(p_ptr);
482 tipc_net_route_msg(buf);
486 static struct sk_buff *port_build_self_abort_msg(struct tipc_port *p_ptr, u32 err)
488 struct sk_buff *buf = port_build_peer_abort_msg(p_ptr, err);
491 struct tipc_msg *msg = buf_msg(buf);
492 msg_swap_words(msg, 4, 5);
493 msg_swap_words(msg, 6, 7);
499 static struct sk_buff *port_build_peer_abort_msg(struct tipc_port *p_ptr, u32 err)
502 struct tipc_msg *msg;
505 if (!p_ptr->connected)
508 buf = tipc_buf_acquire(BASIC_H_SIZE);
511 memcpy(msg, &p_ptr->phdr, BASIC_H_SIZE);
512 msg_set_hdr_sz(msg, BASIC_H_SIZE);
513 msg_set_size(msg, BASIC_H_SIZE);
514 imp = msg_importance(msg);
515 if (imp < TIPC_CRITICAL_IMPORTANCE)
516 msg_set_importance(msg, ++imp);
517 msg_set_errcode(msg, err);
522 void tipc_port_recv_proto_msg(struct sk_buff *buf)
524 struct tipc_msg *msg = buf_msg(buf);
525 struct tipc_port *p_ptr;
526 struct sk_buff *r_buf = NULL;
527 u32 destport = msg_destport(msg);
530 /* Validate connection */
531 p_ptr = tipc_port_lock(destport);
532 if (!p_ptr || !p_ptr->connected || !tipc_port_peer_msg(p_ptr, msg)) {
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, msg_orignode(msg));
538 msg_set_errcode(msg, TIPC_ERR_NO_PORT);
539 msg_set_origport(msg, destport);
540 msg_set_destport(msg, msg_origport(msg));
543 tipc_port_unlock(p_ptr);
547 /* Process protocol message sent by peer */
548 switch (msg_type(msg)) {
550 wakeable = tipc_port_congested(p_ptr) && p_ptr->congested &&
552 p_ptr->acked += msg_msgcnt(msg);
553 if (!tipc_port_congested(p_ptr)) {
554 p_ptr->congested = 0;
556 p_ptr->wakeup(p_ptr);
560 r_buf = port_build_proto_msg(p_ptr, CONN_PROBE_REPLY, 0);
563 /* CONN_PROBE_REPLY or unrecognized - no action required */
566 p_ptr->probing_state = CONFIRMED;
567 tipc_port_unlock(p_ptr);
569 tipc_net_route_msg(r_buf);
573 static int port_print(struct tipc_port *p_ptr, char *buf, int len, int full_id)
575 struct publication *publ;
579 ret = tipc_snprintf(buf, len, "<%u.%u.%u:%u>:",
580 tipc_zone(tipc_own_addr),
581 tipc_cluster(tipc_own_addr),
582 tipc_node(tipc_own_addr), p_ptr->ref);
584 ret = tipc_snprintf(buf, len, "%-10u:", p_ptr->ref);
586 if (p_ptr->connected) {
587 u32 dport = port_peerport(p_ptr);
588 u32 destnode = port_peernode(p_ptr);
590 ret += tipc_snprintf(buf + ret, len - ret,
591 " connected to <%u.%u.%u:%u>",
593 tipc_cluster(destnode),
594 tipc_node(destnode), dport);
595 if (p_ptr->conn_type != 0)
596 ret += tipc_snprintf(buf + ret, len - ret,
597 " via {%u,%u}", p_ptr->conn_type,
598 p_ptr->conn_instance);
599 } else if (p_ptr->published) {
600 ret += tipc_snprintf(buf + ret, len - ret, " bound to");
601 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
602 if (publ->lower == publ->upper)
603 ret += tipc_snprintf(buf + ret, len - ret,
604 " {%u,%u}", publ->type,
607 ret += tipc_snprintf(buf + ret, len - ret,
608 " {%u,%u,%u}", publ->type,
609 publ->lower, publ->upper);
612 ret += tipc_snprintf(buf + ret, len - ret, "\n");
616 struct sk_buff *tipc_port_get_ports(void)
619 struct tlv_desc *rep_tlv;
622 struct tipc_port *p_ptr;
625 buf = tipc_cfg_reply_alloc(TLV_SPACE(ULTRA_STRING_MAX_LEN));
628 rep_tlv = (struct tlv_desc *)buf->data;
629 pb = TLV_DATA(rep_tlv);
630 pb_len = ULTRA_STRING_MAX_LEN;
632 spin_lock_bh(&tipc_port_list_lock);
633 list_for_each_entry(p_ptr, &ports, port_list) {
634 spin_lock_bh(p_ptr->lock);
635 str_len += port_print(p_ptr, pb, pb_len, 0);
636 spin_unlock_bh(p_ptr->lock);
638 spin_unlock_bh(&tipc_port_list_lock);
639 str_len += 1; /* for "\0" */
640 skb_put(buf, TLV_SPACE(str_len));
641 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
646 void tipc_port_reinit(void)
648 struct tipc_port *p_ptr;
649 struct tipc_msg *msg;
651 spin_lock_bh(&tipc_port_list_lock);
652 list_for_each_entry(p_ptr, &ports, port_list) {
654 msg_set_prevnode(msg, tipc_own_addr);
655 msg_set_orignode(msg, tipc_own_addr);
657 spin_unlock_bh(&tipc_port_list_lock);
660 void tipc_acknowledge(u32 ref, u32 ack)
662 struct tipc_port *p_ptr;
663 struct sk_buff *buf = NULL;
665 p_ptr = tipc_port_lock(ref);
668 if (p_ptr->connected) {
669 p_ptr->conn_unacked -= ack;
670 buf = port_build_proto_msg(p_ptr, CONN_ACK, ack);
672 tipc_port_unlock(p_ptr);
673 tipc_net_route_msg(buf);
676 int tipc_portimportance(u32 ref, unsigned int *importance)
678 struct tipc_port *p_ptr;
680 p_ptr = tipc_port_lock(ref);
683 *importance = (unsigned int)msg_importance(&p_ptr->phdr);
684 tipc_port_unlock(p_ptr);
688 int tipc_set_portimportance(u32 ref, unsigned int imp)
690 struct tipc_port *p_ptr;
692 if (imp > TIPC_CRITICAL_IMPORTANCE)
695 p_ptr = tipc_port_lock(ref);
698 msg_set_importance(&p_ptr->phdr, (u32)imp);
699 tipc_port_unlock(p_ptr);
704 int tipc_publish(struct tipc_port *p_ptr, unsigned int scope,
705 struct tipc_name_seq const *seq)
707 struct publication *publ;
710 if (p_ptr->connected)
712 key = p_ptr->ref + p_ptr->pub_count + 1;
713 if (key == p_ptr->ref)
716 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
717 scope, p_ptr->ref, key);
719 list_add(&publ->pport_list, &p_ptr->publications);
721 p_ptr->published = 1;
727 int tipc_withdraw(struct tipc_port *p_ptr, unsigned int scope,
728 struct tipc_name_seq const *seq)
730 struct publication *publ;
731 struct publication *tpubl;
735 list_for_each_entry_safe(publ, tpubl,
736 &p_ptr->publications, pport_list) {
737 tipc_nametbl_withdraw(publ->type, publ->lower,
738 publ->ref, publ->key);
742 list_for_each_entry_safe(publ, tpubl,
743 &p_ptr->publications, pport_list) {
744 if (publ->scope != scope)
746 if (publ->type != seq->type)
748 if (publ->lower != seq->lower)
750 if (publ->upper != seq->upper)
752 tipc_nametbl_withdraw(publ->type, publ->lower,
753 publ->ref, publ->key);
758 if (list_empty(&p_ptr->publications))
759 p_ptr->published = 0;
763 int tipc_connect(u32 ref, struct tipc_portid const *peer)
765 struct tipc_port *p_ptr;
768 p_ptr = tipc_port_lock(ref);
771 res = __tipc_connect(ref, p_ptr, peer);
772 tipc_port_unlock(p_ptr);
777 * __tipc_connect - connect to a remote peer
779 * Port must be locked.
781 int __tipc_connect(u32 ref, struct tipc_port *p_ptr,
782 struct tipc_portid const *peer)
784 struct tipc_msg *msg;
787 if (p_ptr->published || p_ptr->connected)
793 msg_set_destnode(msg, peer->node);
794 msg_set_destport(msg, peer->ref);
795 msg_set_type(msg, TIPC_CONN_MSG);
796 msg_set_lookup_scope(msg, 0);
797 msg_set_hdr_sz(msg, SHORT_H_SIZE);
799 p_ptr->probing_interval = PROBING_INTERVAL;
800 p_ptr->probing_state = CONFIRMED;
801 p_ptr->connected = 1;
802 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
804 tipc_nodesub_subscribe(&p_ptr->subscription, peer->node,
805 (void *)(unsigned long)ref,
806 (net_ev_handler)port_handle_node_down);
809 p_ptr->max_pkt = tipc_link_get_max_pkt(peer->node, ref);
814 * __tipc_disconnect - disconnect port from peer
816 * Port must be locked.
818 int __tipc_disconnect(struct tipc_port *tp_ptr)
822 if (tp_ptr->connected) {
823 tp_ptr->connected = 0;
824 /* let timer expire on it's own to avoid deadlock! */
825 tipc_nodesub_unsubscribe(&tp_ptr->subscription);
834 * tipc_disconnect(): Disconnect port form peer.
835 * This is a node local operation.
837 int tipc_disconnect(u32 ref)
839 struct tipc_port *p_ptr;
842 p_ptr = tipc_port_lock(ref);
845 res = __tipc_disconnect(p_ptr);
846 tipc_port_unlock(p_ptr);
851 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
853 int tipc_shutdown(u32 ref)
855 struct tipc_port *p_ptr;
856 struct sk_buff *buf = NULL;
858 p_ptr = tipc_port_lock(ref);
862 buf = port_build_peer_abort_msg(p_ptr, TIPC_CONN_SHUTDOWN);
863 tipc_port_unlock(p_ptr);
864 tipc_net_route_msg(buf);
865 return tipc_disconnect(ref);
869 * tipc_port_recv_msg - receive message from lower layer and deliver to port user
871 int tipc_port_recv_msg(struct sk_buff *buf)
873 struct tipc_port *p_ptr;
874 struct tipc_msg *msg = buf_msg(buf);
875 u32 destport = msg_destport(msg);
876 u32 dsz = msg_data_sz(msg);
879 /* forward unresolved named message */
880 if (unlikely(!destport)) {
881 tipc_net_route_msg(buf);
885 /* validate destination & pass to port, otherwise reject message */
886 p_ptr = tipc_port_lock(destport);
888 err = p_ptr->dispatcher(p_ptr, buf);
889 tipc_port_unlock(p_ptr);
893 err = TIPC_ERR_NO_PORT;
896 return tipc_reject_msg(buf, err);
900 * tipc_port_recv_sections(): Concatenate and deliver sectioned
901 * message for this node.
903 static int tipc_port_recv_sections(struct tipc_port *sender,
904 struct iovec const *msg_sect,
910 res = tipc_msg_build(&sender->phdr, msg_sect, len, MAX_MSG_SIZE, &buf);
912 tipc_port_recv_msg(buf);
917 * tipc_send - send message sections on connection
919 int tipc_send(u32 ref, struct iovec const *msg_sect, unsigned int len)
921 struct tipc_port *p_ptr;
925 p_ptr = tipc_port_deref(ref);
926 if (!p_ptr || !p_ptr->connected)
929 p_ptr->congested = 1;
930 if (!tipc_port_congested(p_ptr)) {
931 destnode = port_peernode(p_ptr);
932 if (likely(!in_own_node(destnode)))
933 res = tipc_link_send_sections_fast(p_ptr, msg_sect,
936 res = tipc_port_recv_sections(p_ptr, msg_sect, len);
938 if (likely(res != -ELINKCONG)) {
939 p_ptr->congested = 0;
945 if (port_unreliable(p_ptr)) {
946 p_ptr->congested = 0;
953 * tipc_send2name - send message sections to port name
955 int tipc_send2name(u32 ref, struct tipc_name const *name, unsigned int domain,
956 struct iovec const *msg_sect, unsigned int len)
958 struct tipc_port *p_ptr;
959 struct tipc_msg *msg;
960 u32 destnode = domain;
964 p_ptr = tipc_port_deref(ref);
965 if (!p_ptr || p_ptr->connected)
969 msg_set_type(msg, TIPC_NAMED_MSG);
970 msg_set_hdr_sz(msg, NAMED_H_SIZE);
971 msg_set_nametype(msg, name->type);
972 msg_set_nameinst(msg, name->instance);
973 msg_set_lookup_scope(msg, tipc_addr_scope(domain));
974 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
975 msg_set_destnode(msg, destnode);
976 msg_set_destport(msg, destport);
978 if (likely(destport || destnode)) {
979 if (likely(in_own_node(destnode)))
980 res = tipc_port_recv_sections(p_ptr, msg_sect, len);
981 else if (tipc_own_addr)
982 res = tipc_link_send_sections_fast(p_ptr, msg_sect,
985 res = tipc_port_reject_sections(p_ptr, msg, msg_sect,
986 len, TIPC_ERR_NO_NODE);
987 if (likely(res != -ELINKCONG)) {
992 if (port_unreliable(p_ptr)) {
997 return tipc_port_reject_sections(p_ptr, msg, msg_sect, len,
1002 * tipc_send2port - send message sections to port identity
1004 int tipc_send2port(u32 ref, struct tipc_portid const *dest,
1005 struct iovec const *msg_sect, unsigned int len)
1007 struct tipc_port *p_ptr;
1008 struct tipc_msg *msg;
1011 p_ptr = tipc_port_deref(ref);
1012 if (!p_ptr || p_ptr->connected)
1016 msg_set_type(msg, TIPC_DIRECT_MSG);
1017 msg_set_lookup_scope(msg, 0);
1018 msg_set_destnode(msg, dest->node);
1019 msg_set_destport(msg, dest->ref);
1020 msg_set_hdr_sz(msg, BASIC_H_SIZE);
1022 if (in_own_node(dest->node))
1023 res = tipc_port_recv_sections(p_ptr, msg_sect, len);
1024 else if (tipc_own_addr)
1025 res = tipc_link_send_sections_fast(p_ptr, msg_sect, len,
1028 res = tipc_port_reject_sections(p_ptr, msg, msg_sect, len,
1030 if (likely(res != -ELINKCONG)) {
1035 if (port_unreliable(p_ptr)) {