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))