2 * net/tipc/port.c: TIPC port code
4 * Copyright (c) 1992-2007, Ericsson AB
5 * Copyright (c) 2004-2008, 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.
44 #include "name_table.h"
49 /* Connection management: */
50 #define PROBING_INTERVAL 3600000 /* [ms] => 1 h */
54 #define MAX_REJECT_SIZE 1024
56 static struct sk_buff *msg_queue_head = NULL;
57 static struct sk_buff *msg_queue_tail = NULL;
59 DEFINE_SPINLOCK(tipc_port_list_lock);
60 static DEFINE_SPINLOCK(queue_lock);
62 static LIST_HEAD(ports);
63 static void port_handle_node_down(unsigned long ref);
64 static struct sk_buff* port_build_self_abort_msg(struct port *,u32 err);
65 static struct sk_buff* port_build_peer_abort_msg(struct port *,u32 err);
66 static void port_timeout(unsigned long ref);
69 static u32 port_peernode(struct port *p_ptr)
71 return msg_destnode(&p_ptr->publ.phdr);
74 static u32 port_peerport(struct port *p_ptr)
76 return msg_destport(&p_ptr->publ.phdr);
79 static u32 port_out_seqno(struct port *p_ptr)
81 return msg_transp_seqno(&p_ptr->publ.phdr);
84 static void port_incr_out_seqno(struct port *p_ptr)
86 struct tipc_msg *m = &p_ptr->publ.phdr;
88 if (likely(!msg_routed(m)))
90 msg_set_transp_seqno(m, (msg_transp_seqno(m) + 1));
94 * tipc_multicast - send a multicast message to local and remote destinations
97 int tipc_multicast(u32 ref, struct tipc_name_seq const *seq, u32 domain,
98 u32 num_sect, struct iovec const *msg_sect)
100 struct tipc_msg *hdr;
102 struct sk_buff *ibuf = NULL;
103 struct port_list dports = {0, NULL, };
104 struct port *oport = tipc_port_deref(ref);
108 if (unlikely(!oport))
111 /* Create multicast message */
113 hdr = &oport->publ.phdr;
114 msg_set_type(hdr, TIPC_MCAST_MSG);
115 msg_set_nametype(hdr, seq->type);
116 msg_set_namelower(hdr, seq->lower);
117 msg_set_nameupper(hdr, seq->upper);
118 msg_set_hdr_sz(hdr, MCAST_H_SIZE);
119 res = tipc_msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
120 !oport->user_port, &buf);
124 /* Figure out where to send multicast message */
126 ext_targets = tipc_nametbl_mc_translate(seq->type, seq->lower, seq->upper,
127 TIPC_NODE_SCOPE, &dports);
129 /* 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)) {
150 tipc_port_recv_mcast(ibuf, &dports);
152 tipc_port_list_free(&dports);
158 * tipc_port_recv_mcast - deliver multicast message to all destination ports
160 * If there is no port list, perform a lookup to create one
163 void tipc_port_recv_mcast(struct sk_buff *buf, struct port_list *dp)
165 struct tipc_msg* msg;
166 struct port_list dports = {0, NULL, };
167 struct port_list *item = dp;
172 /* Create destination port list, if one wasn't supplied */
175 tipc_nametbl_mc_translate(msg_nametype(msg),
183 /* Deliver a copy of message to each destination port */
185 if (dp->count != 0) {
186 if (dp->count == 1) {
187 msg_set_destport(msg, dp->ports[0]);
188 tipc_port_recv_msg(buf);
189 tipc_port_list_free(dp);
192 for (; cnt < dp->count; cnt++) {
193 int index = cnt % PLSIZE;
194 struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
197 warn("Unable to deliver multicast message(s)\n");
198 msg_dbg(msg, "LOST:");
201 if ((index == 0) && (cnt != 0)) {
204 msg_set_destport(buf_msg(b),item->ports[index]);
205 tipc_port_recv_msg(b);
210 tipc_port_list_free(dp);
214 * tipc_createport_raw - create a generic TIPC port
216 * Returns pointer to (locked) TIPC port, or NULL if unable to create it
219 struct tipc_port *tipc_createport_raw(void *usr_handle,
220 u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
221 void (*wakeup)(struct tipc_port *),
222 const u32 importance)
225 struct tipc_msg *msg;
228 p_ptr = kzalloc(sizeof(*p_ptr), GFP_ATOMIC);
230 warn("Port creation failed, no memory\n");
233 ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
235 warn("Port creation failed, reference table exhausted\n");
240 p_ptr->publ.usr_handle = usr_handle;
241 p_ptr->publ.max_pkt = MAX_PKT_DEFAULT;
242 p_ptr->publ.ref = ref;
243 msg = &p_ptr->publ.phdr;
244 tipc_msg_init(msg, importance, TIPC_NAMED_MSG, LONG_H_SIZE, 0);
245 msg_set_origport(msg, ref);
246 p_ptr->last_in_seqno = 41;
248 INIT_LIST_HEAD(&p_ptr->wait_list);
249 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
250 p_ptr->dispatcher = dispatcher;
251 p_ptr->wakeup = wakeup;
252 p_ptr->user_port = NULL;
253 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
254 spin_lock_bh(&tipc_port_list_lock);
255 INIT_LIST_HEAD(&p_ptr->publications);
256 INIT_LIST_HEAD(&p_ptr->port_list);
257 list_add_tail(&p_ptr->port_list, &ports);
258 spin_unlock_bh(&tipc_port_list_lock);
259 return &(p_ptr->publ);
262 int tipc_deleteport(u32 ref)
265 struct sk_buff *buf = NULL;
267 tipc_withdraw(ref, 0, NULL);
268 p_ptr = tipc_port_lock(ref);
272 tipc_ref_discard(ref);
273 tipc_port_unlock(p_ptr);
275 k_cancel_timer(&p_ptr->timer);
276 if (p_ptr->publ.connected) {
277 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
278 tipc_nodesub_unsubscribe(&p_ptr->subscription);
280 if (p_ptr->user_port) {
281 tipc_reg_remove_port(p_ptr->user_port);
282 kfree(p_ptr->user_port);
285 spin_lock_bh(&tipc_port_list_lock);
286 list_del(&p_ptr->port_list);
287 list_del(&p_ptr->wait_list);
288 spin_unlock_bh(&tipc_port_list_lock);
289 k_term_timer(&p_ptr->timer);
291 dbg("Deleted port %u\n", ref);
292 tipc_net_route_msg(buf);
296 static int port_unreliable(struct port *p_ptr)
298 return msg_src_droppable(&p_ptr->publ.phdr);
301 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
305 p_ptr = tipc_port_lock(ref);
308 *isunreliable = port_unreliable(p_ptr);
309 tipc_port_unlock(p_ptr);
313 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
317 p_ptr = tipc_port_lock(ref);
320 msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
321 tipc_port_unlock(p_ptr);
325 static int port_unreturnable(struct port *p_ptr)
327 return msg_dest_droppable(&p_ptr->publ.phdr);
330 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
334 p_ptr = tipc_port_lock(ref);
337 *isunrejectable = port_unreturnable(p_ptr);
338 tipc_port_unlock(p_ptr);
342 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
346 p_ptr = tipc_port_lock(ref);
349 msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
350 tipc_port_unlock(p_ptr);
355 * port_build_proto_msg(): build a port level protocol
356 * or a connection abortion message. Called with
359 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
360 u32 origport, u32 orignode,
361 u32 usr, u32 type, u32 err,
365 struct tipc_msg *msg;
367 buf = tipc_buf_acquire(LONG_H_SIZE);
370 tipc_msg_init(msg, usr, type, LONG_H_SIZE, destnode);
371 msg_set_errcode(msg, err);
372 msg_set_destport(msg, destport);
373 msg_set_origport(msg, origport);
374 msg_set_orignode(msg, orignode);
375 msg_set_transp_seqno(msg, seqno);
376 msg_set_msgcnt(msg, ack);
377 msg_dbg(msg, "PORT>SEND>:");
382 int tipc_reject_msg(struct sk_buff *buf, u32 err)
384 struct tipc_msg *msg = buf_msg(buf);
385 struct sk_buff *rbuf;
386 struct tipc_msg *rmsg;
388 u32 imp = msg_importance(msg);
389 u32 data_sz = msg_data_sz(msg);
391 if (data_sz > MAX_REJECT_SIZE)
392 data_sz = MAX_REJECT_SIZE;
393 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
395 msg_dbg(msg, "port->rej: ");
397 /* discard rejected message if it shouldn't be returned to sender */
398 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
403 /* construct rejected message */
405 hdr_sz = MCAST_H_SIZE;
407 hdr_sz = LONG_H_SIZE;
408 rbuf = tipc_buf_acquire(data_sz + hdr_sz);
413 rmsg = buf_msg(rbuf);
414 tipc_msg_init(rmsg, imp, msg_type(msg), hdr_sz, msg_orignode(msg));
415 msg_set_errcode(rmsg, err);
416 msg_set_destport(rmsg, msg_origport(msg));
417 msg_set_origport(rmsg, msg_destport(msg));
418 if (msg_short(msg)) {
419 msg_set_orignode(rmsg, tipc_own_addr);
420 /* leave name type & instance as zeroes */
422 msg_set_orignode(rmsg, msg_destnode(msg));
423 msg_set_nametype(rmsg, msg_nametype(msg));
424 msg_set_nameinst(rmsg, msg_nameinst(msg));
426 msg_set_size(rmsg, data_sz + hdr_sz);
427 skb_copy_to_linear_data_offset(rbuf, hdr_sz, msg_data(msg), data_sz);
429 /* send self-abort message when rejecting on a connected port */
430 if (msg_connected(msg)) {
431 struct sk_buff *abuf = NULL;
432 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
435 if (p_ptr->publ.connected)
436 abuf = port_build_self_abort_msg(p_ptr, err);
437 tipc_port_unlock(p_ptr);
439 tipc_net_route_msg(abuf);
442 /* send rejected message */
444 tipc_net_route_msg(rbuf);
448 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
449 struct iovec const *msg_sect, u32 num_sect,
455 res = tipc_msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
456 !p_ptr->user_port, &buf);
460 return tipc_reject_msg(buf, err);
463 static void port_timeout(unsigned long ref)
465 struct port *p_ptr = tipc_port_lock(ref);
466 struct sk_buff *buf = NULL;
471 if (!p_ptr->publ.connected) {
472 tipc_port_unlock(p_ptr);
476 /* Last probe answered ? */
477 if (p_ptr->probing_state == PROBING) {
478 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
480 buf = port_build_proto_msg(port_peerport(p_ptr),
481 port_peernode(p_ptr),
487 port_out_seqno(p_ptr),
489 port_incr_out_seqno(p_ptr);
490 p_ptr->probing_state = PROBING;
491 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
493 tipc_port_unlock(p_ptr);
494 tipc_net_route_msg(buf);
498 static void port_handle_node_down(unsigned long ref)
500 struct port *p_ptr = tipc_port_lock(ref);
501 struct sk_buff* buf = NULL;
505 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
506 tipc_port_unlock(p_ptr);
507 tipc_net_route_msg(buf);
511 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
513 u32 imp = msg_importance(&p_ptr->publ.phdr);
515 if (!p_ptr->publ.connected)
517 if (imp < TIPC_CRITICAL_IMPORTANCE)
519 return port_build_proto_msg(p_ptr->publ.ref,
521 port_peerport(p_ptr),
522 port_peernode(p_ptr),
526 p_ptr->last_in_seqno + 1,
531 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
533 u32 imp = msg_importance(&p_ptr->publ.phdr);
535 if (!p_ptr->publ.connected)
537 if (imp < TIPC_CRITICAL_IMPORTANCE)
539 return port_build_proto_msg(port_peerport(p_ptr),
540 port_peernode(p_ptr),
546 port_out_seqno(p_ptr),
550 void tipc_port_recv_proto_msg(struct sk_buff *buf)
552 struct tipc_msg *msg = buf_msg(buf);
553 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
555 struct sk_buff *r_buf = NULL;
556 struct sk_buff *abort_buf = NULL;
558 msg_dbg(msg, "PORT<RECV<:");
561 err = TIPC_ERR_NO_PORT;
562 } else if (p_ptr->publ.connected) {
563 if ((port_peernode(p_ptr) != msg_orignode(msg)) ||
564 (port_peerport(p_ptr) != msg_origport(msg))) {
565 err = TIPC_ERR_NO_PORT;
566 } else if (msg_type(msg) == CONN_ACK) {
567 int wakeup = tipc_port_congested(p_ptr) &&
568 p_ptr->publ.congested &&
570 p_ptr->acked += msg_msgcnt(msg);
571 if (tipc_port_congested(p_ptr))
573 p_ptr->publ.congested = 0;
576 p_ptr->wakeup(&p_ptr->publ);
579 } else if (p_ptr->publ.published) {
580 err = TIPC_ERR_NO_PORT;
583 r_buf = port_build_proto_msg(msg_origport(msg),
587 TIPC_HIGH_IMPORTANCE,
596 if (msg_type(msg) == CONN_PROBE) {
597 r_buf = port_build_proto_msg(msg_origport(msg),
604 port_out_seqno(p_ptr),
607 p_ptr->probing_state = CONFIRMED;
608 port_incr_out_seqno(p_ptr);
611 tipc_port_unlock(p_ptr);
612 tipc_net_route_msg(r_buf);
613 tipc_net_route_msg(abort_buf);
617 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
619 struct publication *publ;
622 tipc_printf(buf, "<%u.%u.%u:%u>:",
623 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
624 tipc_node(tipc_own_addr), p_ptr->publ.ref);
626 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
628 if (p_ptr->publ.connected) {
629 u32 dport = port_peerport(p_ptr);
630 u32 destnode = port_peernode(p_ptr);
632 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
633 tipc_zone(destnode), tipc_cluster(destnode),
634 tipc_node(destnode), dport);
635 if (p_ptr->publ.conn_type != 0)
636 tipc_printf(buf, " via {%u,%u}",
637 p_ptr->publ.conn_type,
638 p_ptr->publ.conn_instance);
640 else if (p_ptr->publ.published) {
641 tipc_printf(buf, " bound to");
642 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
643 if (publ->lower == publ->upper)
644 tipc_printf(buf, " {%u,%u}", publ->type,
647 tipc_printf(buf, " {%u,%u,%u}", publ->type,
648 publ->lower, publ->upper);
651 tipc_printf(buf, "\n");
654 #define MAX_PORT_QUERY 32768
656 struct sk_buff *tipc_port_get_ports(void)
659 struct tlv_desc *rep_tlv;
664 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
667 rep_tlv = (struct tlv_desc *)buf->data;
669 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
670 spin_lock_bh(&tipc_port_list_lock);
671 list_for_each_entry(p_ptr, &ports, port_list) {
672 spin_lock_bh(p_ptr->publ.lock);
673 port_print(p_ptr, &pb, 0);
674 spin_unlock_bh(p_ptr->publ.lock);
676 spin_unlock_bh(&tipc_port_list_lock);
677 str_len = tipc_printbuf_validate(&pb);
679 skb_put(buf, TLV_SPACE(str_len));
680 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
685 void tipc_port_reinit(void)
688 struct tipc_msg *msg;
690 spin_lock_bh(&tipc_port_list_lock);
691 list_for_each_entry(p_ptr, &ports, port_list) {
692 msg = &p_ptr->publ.phdr;
693 if (msg_orignode(msg) == tipc_own_addr)
695 msg_set_prevnode(msg, tipc_own_addr);
696 msg_set_orignode(msg, tipc_own_addr);
698 spin_unlock_bh(&tipc_port_list_lock);
703 * port_dispatcher_sigh(): Signal handler for messages destinated
704 * to the tipc_port interface.
707 static void port_dispatcher_sigh(void *dummy)
711 spin_lock_bh(&queue_lock);
712 buf = msg_queue_head;
713 msg_queue_head = NULL;
714 spin_unlock_bh(&queue_lock);
718 struct user_port *up_ptr;
719 struct tipc_portid orig;
720 struct tipc_name_seq dseq;
726 struct sk_buff *next = buf->next;
727 struct tipc_msg *msg = buf_msg(buf);
728 u32 dref = msg_destport(msg);
730 message_type = msg_type(msg);
731 if (message_type > TIPC_DIRECT_MSG)
732 goto reject; /* Unsupported message type */
734 p_ptr = tipc_port_lock(dref);
736 goto reject; /* Port deleted while msg in queue */
738 orig.ref = msg_origport(msg);
739 orig.node = msg_orignode(msg);
740 up_ptr = p_ptr->user_port;
741 usr_handle = up_ptr->usr_handle;
742 connected = p_ptr->publ.connected;
743 published = p_ptr->publ.published;
745 if (unlikely(msg_errcode(msg)))
748 switch (message_type) {
751 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
752 u32 peer_port = port_peerport(p_ptr);
753 u32 peer_node = port_peernode(p_ptr);
755 tipc_port_unlock(p_ptr);
758 if (unlikely(!connected)) {
759 if (tipc_connect2port(dref, &orig))
761 } else if ((msg_origport(msg) != peer_port) ||
762 (msg_orignode(msg) != peer_node))
764 if (unlikely(++p_ptr->publ.conn_unacked >=
765 TIPC_FLOW_CONTROL_WIN))
766 tipc_acknowledge(dref,
767 p_ptr->publ.conn_unacked);
768 skb_pull(buf, msg_hdr_sz(msg));
769 cb(usr_handle, dref, &buf, msg_data(msg),
773 case TIPC_DIRECT_MSG:{
774 tipc_msg_event cb = up_ptr->msg_cb;
776 tipc_port_unlock(p_ptr);
777 if (unlikely(!cb || connected))
779 skb_pull(buf, msg_hdr_sz(msg));
780 cb(usr_handle, dref, &buf, msg_data(msg),
781 msg_data_sz(msg), msg_importance(msg),
786 case TIPC_NAMED_MSG:{
787 tipc_named_msg_event cb = up_ptr->named_msg_cb;
789 tipc_port_unlock(p_ptr);
790 if (unlikely(!cb || connected || !published))
792 dseq.type = msg_nametype(msg);
793 dseq.lower = msg_nameinst(msg);
794 dseq.upper = (message_type == TIPC_NAMED_MSG)
795 ? dseq.lower : msg_nameupper(msg);
796 skb_pull(buf, msg_hdr_sz(msg));
797 cb(usr_handle, dref, &buf, msg_data(msg),
798 msg_data_sz(msg), msg_importance(msg),
808 switch (message_type) {
811 tipc_conn_shutdown_event cb =
813 u32 peer_port = port_peerport(p_ptr);
814 u32 peer_node = port_peernode(p_ptr);
816 tipc_port_unlock(p_ptr);
817 if (!cb || !connected)
819 if ((msg_origport(msg) != peer_port) ||
820 (msg_orignode(msg) != peer_node))
822 tipc_disconnect(dref);
823 skb_pull(buf, msg_hdr_sz(msg));
824 cb(usr_handle, dref, &buf, msg_data(msg),
825 msg_data_sz(msg), msg_errcode(msg));
828 case TIPC_DIRECT_MSG:{
829 tipc_msg_err_event cb = up_ptr->err_cb;
831 tipc_port_unlock(p_ptr);
832 if (!cb || connected)
834 skb_pull(buf, msg_hdr_sz(msg));
835 cb(usr_handle, dref, &buf, msg_data(msg),
836 msg_data_sz(msg), msg_errcode(msg), &orig);
840 case TIPC_NAMED_MSG:{
841 tipc_named_msg_err_event cb =
842 up_ptr->named_err_cb;
844 tipc_port_unlock(p_ptr);
845 if (!cb || connected)
847 dseq.type = msg_nametype(msg);
848 dseq.lower = msg_nameinst(msg);
849 dseq.upper = (message_type == TIPC_NAMED_MSG)
850 ? dseq.lower : msg_nameupper(msg);
851 skb_pull(buf, msg_hdr_sz(msg));
852 cb(usr_handle, dref, &buf, msg_data(msg),
853 msg_data_sz(msg), msg_errcode(msg), &dseq);
862 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
868 * port_dispatcher(): Dispatcher for messages destinated
869 * to the tipc_port interface. Called with port locked.
872 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
875 spin_lock_bh(&queue_lock);
876 if (msg_queue_head) {
877 msg_queue_tail->next = buf;
878 msg_queue_tail = buf;
880 msg_queue_tail = msg_queue_head = buf;
881 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
883 spin_unlock_bh(&queue_lock);
888 * Wake up port after congestion: Called with port locked,
892 static void port_wakeup_sh(unsigned long ref)
895 struct user_port *up_ptr;
896 tipc_continue_event cb = NULL;
899 p_ptr = tipc_port_lock(ref);
901 up_ptr = p_ptr->user_port;
903 cb = up_ptr->continue_event_cb;
904 uh = up_ptr->usr_handle;
906 tipc_port_unlock(p_ptr);
913 static void port_wakeup(struct tipc_port *p_ptr)
915 tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
918 void tipc_acknowledge(u32 ref, u32 ack)
921 struct sk_buff *buf = NULL;
923 p_ptr = tipc_port_lock(ref);
926 if (p_ptr->publ.connected) {
927 p_ptr->publ.conn_unacked -= ack;
928 buf = port_build_proto_msg(port_peerport(p_ptr),
929 port_peernode(p_ptr),
935 port_out_seqno(p_ptr),
938 tipc_port_unlock(p_ptr);
939 tipc_net_route_msg(buf);
943 * tipc_createport(): user level call. Will add port to
944 * registry if non-zero user_ref.
947 int tipc_createport(u32 user_ref,
949 unsigned int importance,
950 tipc_msg_err_event error_cb,
951 tipc_named_msg_err_event named_error_cb,
952 tipc_conn_shutdown_event conn_error_cb,
953 tipc_msg_event msg_cb,
954 tipc_named_msg_event named_msg_cb,
955 tipc_conn_msg_event conn_msg_cb,
956 tipc_continue_event continue_event_cb,/* May be zero */
959 struct user_port *up_ptr;
962 up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
964 warn("Port creation failed, no memory\n");
967 p_ptr = (struct port *)tipc_createport_raw(NULL, port_dispatcher,
968 port_wakeup, importance);
974 p_ptr->user_port = up_ptr;
975 up_ptr->user_ref = user_ref;
976 up_ptr->usr_handle = usr_handle;
977 up_ptr->ref = p_ptr->publ.ref;
978 up_ptr->err_cb = error_cb;
979 up_ptr->named_err_cb = named_error_cb;
980 up_ptr->conn_err_cb = conn_error_cb;
981 up_ptr->msg_cb = msg_cb;
982 up_ptr->named_msg_cb = named_msg_cb;
983 up_ptr->conn_msg_cb = conn_msg_cb;
984 up_ptr->continue_event_cb = continue_event_cb;
985 INIT_LIST_HEAD(&up_ptr->uport_list);
986 tipc_reg_add_port(up_ptr);
987 *portref = p_ptr->publ.ref;
988 tipc_port_unlock(p_ptr);
992 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
995 id->node = tipc_own_addr;
999 int tipc_portimportance(u32 ref, unsigned int *importance)
1003 p_ptr = tipc_port_lock(ref);
1006 *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1007 tipc_port_unlock(p_ptr);
1011 int tipc_set_portimportance(u32 ref, unsigned int imp)
1015 if (imp > TIPC_CRITICAL_IMPORTANCE)
1018 p_ptr = tipc_port_lock(ref);
1021 msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1022 tipc_port_unlock(p_ptr);
1027 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1030 struct publication *publ;
1034 p_ptr = tipc_port_lock(ref);
1038 dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1039 "lower = %u, upper = %u\n",
1040 ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1041 if (p_ptr->publ.connected)
1043 if (seq->lower > seq->upper)
1045 if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1047 key = ref + p_ptr->pub_count + 1;
1052 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1053 scope, p_ptr->publ.ref, key);
1055 list_add(&publ->pport_list, &p_ptr->publications);
1057 p_ptr->publ.published = 1;
1061 tipc_port_unlock(p_ptr);
1065 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1068 struct publication *publ;
1069 struct publication *tpubl;
1072 p_ptr = tipc_port_lock(ref);
1076 list_for_each_entry_safe(publ, tpubl,
1077 &p_ptr->publications, pport_list) {
1078 tipc_nametbl_withdraw(publ->type, publ->lower,
1079 publ->ref, publ->key);
1083 list_for_each_entry_safe(publ, tpubl,
1084 &p_ptr->publications, pport_list) {
1085 if (publ->scope != scope)
1087 if (publ->type != seq->type)
1089 if (publ->lower != seq->lower)
1091 if (publ->upper != seq->upper)
1093 tipc_nametbl_withdraw(publ->type, publ->lower,
1094 publ->ref, publ->key);
1099 if (list_empty(&p_ptr->publications))
1100 p_ptr->publ.published = 0;
1101 tipc_port_unlock(p_ptr);
1105 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1108 struct tipc_msg *msg;
1111 p_ptr = tipc_port_lock(ref);
1114 if (p_ptr->publ.published || p_ptr->publ.connected)
1119 msg = &p_ptr->publ.phdr;
1120 msg_set_destnode(msg, peer->node);
1121 msg_set_destport(msg, peer->ref);
1122 msg_set_orignode(msg, tipc_own_addr);
1123 msg_set_origport(msg, p_ptr->publ.ref);
1124 msg_set_transp_seqno(msg, 42);
1125 msg_set_type(msg, TIPC_CONN_MSG);
1126 if (!may_route(peer->node))
1127 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1129 msg_set_hdr_sz(msg, LONG_H_SIZE);
1131 p_ptr->probing_interval = PROBING_INTERVAL;
1132 p_ptr->probing_state = CONFIRMED;
1133 p_ptr->publ.connected = 1;
1134 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1136 tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1137 (void *)(unsigned long)ref,
1138 (net_ev_handler)port_handle_node_down);
1141 tipc_port_unlock(p_ptr);
1142 p_ptr->publ.max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1147 * tipc_disconnect_port - disconnect port from peer
1149 * Port must be locked.
1152 int tipc_disconnect_port(struct tipc_port *tp_ptr)
1156 if (tp_ptr->connected) {
1157 tp_ptr->connected = 0;
1158 /* let timer expire on it's own to avoid deadlock! */
1159 tipc_nodesub_unsubscribe(
1160 &((struct port *)tp_ptr)->subscription);
1169 * tipc_disconnect(): Disconnect port form peer.
1170 * This is a node local operation.
1173 int tipc_disconnect(u32 ref)
1178 p_ptr = tipc_port_lock(ref);
1181 res = tipc_disconnect_port((struct tipc_port *)p_ptr);
1182 tipc_port_unlock(p_ptr);
1187 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1189 int tipc_shutdown(u32 ref)
1192 struct sk_buff *buf = NULL;
1194 p_ptr = tipc_port_lock(ref);
1198 if (p_ptr->publ.connected) {
1199 u32 imp = msg_importance(&p_ptr->publ.phdr);
1200 if (imp < TIPC_CRITICAL_IMPORTANCE)
1202 buf = port_build_proto_msg(port_peerport(p_ptr),
1203 port_peernode(p_ptr),
1209 port_out_seqno(p_ptr),
1212 tipc_port_unlock(p_ptr);
1213 tipc_net_route_msg(buf);
1214 return tipc_disconnect(ref);
1218 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1219 * message for this node.
1222 static int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1223 struct iovec const *msg_sect)
1225 struct sk_buff *buf;
1228 res = tipc_msg_build(&sender->publ.phdr, msg_sect, num_sect,
1229 MAX_MSG_SIZE, !sender->user_port, &buf);
1231 tipc_port_recv_msg(buf);
1236 * tipc_send - send message sections on connection
1239 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1245 p_ptr = tipc_port_deref(ref);
1246 if (!p_ptr || !p_ptr->publ.connected)
1249 p_ptr->publ.congested = 1;
1250 if (!tipc_port_congested(p_ptr)) {
1251 destnode = port_peernode(p_ptr);
1252 if (likely(destnode != tipc_own_addr))
1253 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1256 res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1258 if (likely(res != -ELINKCONG)) {
1259 port_incr_out_seqno(p_ptr);
1260 p_ptr->publ.congested = 0;
1265 if (port_unreliable(p_ptr)) {
1266 p_ptr->publ.congested = 0;
1267 /* Just calculate msg length and return */
1268 return tipc_msg_calc_data_size(msg_sect, num_sect);
1274 * tipc_forward2name - forward message sections to port name
1277 static int tipc_forward2name(u32 ref,
1278 struct tipc_name const *name,
1281 struct iovec const *msg_sect,
1282 struct tipc_portid const *orig,
1283 unsigned int importance)
1286 struct tipc_msg *msg;
1287 u32 destnode = domain;
1291 p_ptr = tipc_port_deref(ref);
1292 if (!p_ptr || p_ptr->publ.connected)
1295 msg = &p_ptr->publ.phdr;
1296 msg_set_type(msg, TIPC_NAMED_MSG);
1297 msg_set_orignode(msg, orig->node);
1298 msg_set_origport(msg, orig->ref);
1299 msg_set_hdr_sz(msg, LONG_H_SIZE);
1300 msg_set_nametype(msg, name->type);
1301 msg_set_nameinst(msg, name->instance);
1302 msg_set_lookup_scope(msg, tipc_addr_scope(domain));
1303 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1304 msg_set_importance(msg,importance);
1305 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1306 msg_set_destnode(msg, destnode);
1307 msg_set_destport(msg, destport);
1309 if (likely(destport)) {
1311 if (likely(destnode == tipc_own_addr))
1312 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1313 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1315 if (likely(res != -ELINKCONG))
1317 if (port_unreliable(p_ptr)) {
1318 /* Just calculate msg length and return */
1319 return tipc_msg_calc_data_size(msg_sect, num_sect);
1323 return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1328 * tipc_send2name - send message sections to port name
1331 int tipc_send2name(u32 ref,
1332 struct tipc_name const *name,
1333 unsigned int domain,
1334 unsigned int num_sect,
1335 struct iovec const *msg_sect)
1337 struct tipc_portid orig;
1340 orig.node = tipc_own_addr;
1341 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1342 TIPC_PORT_IMPORTANCE);
1346 * tipc_forward2port - forward message sections to port identity
1349 static int tipc_forward2port(u32 ref,
1350 struct tipc_portid const *dest,
1351 unsigned int num_sect,
1352 struct iovec const *msg_sect,
1353 struct tipc_portid const *orig,
1354 unsigned int importance)
1357 struct tipc_msg *msg;
1360 p_ptr = tipc_port_deref(ref);
1361 if (!p_ptr || p_ptr->publ.connected)
1364 msg = &p_ptr->publ.phdr;
1365 msg_set_type(msg, TIPC_DIRECT_MSG);
1366 msg_set_orignode(msg, orig->node);
1367 msg_set_origport(msg, orig->ref);
1368 msg_set_destnode(msg, dest->node);
1369 msg_set_destport(msg, dest->ref);
1370 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1371 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1372 msg_set_importance(msg, importance);
1374 if (dest->node == tipc_own_addr)
1375 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1376 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1377 if (likely(res != -ELINKCONG))
1379 if (port_unreliable(p_ptr)) {
1380 /* Just calculate msg length and return */
1381 return tipc_msg_calc_data_size(msg_sect, num_sect);
1387 * tipc_send2port - send message sections to port identity
1390 int tipc_send2port(u32 ref,
1391 struct tipc_portid const *dest,
1392 unsigned int num_sect,
1393 struct iovec const *msg_sect)
1395 struct tipc_portid orig;
1398 orig.node = tipc_own_addr;
1399 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1400 TIPC_PORT_IMPORTANCE);
1404 * tipc_forward_buf2port - forward message buffer to port identity
1406 static int tipc_forward_buf2port(u32 ref,
1407 struct tipc_portid const *dest,
1408 struct sk_buff *buf,
1410 struct tipc_portid const *orig,
1411 unsigned int importance)
1414 struct tipc_msg *msg;
1417 p_ptr = (struct port *)tipc_ref_deref(ref);
1418 if (!p_ptr || p_ptr->publ.connected)
1421 msg = &p_ptr->publ.phdr;
1422 msg_set_type(msg, TIPC_DIRECT_MSG);
1423 msg_set_orignode(msg, orig->node);
1424 msg_set_origport(msg, orig->ref);
1425 msg_set_destnode(msg, dest->node);
1426 msg_set_destport(msg, dest->ref);
1427 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1428 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1429 msg_set_importance(msg, importance);
1430 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1431 if (skb_cow(buf, DIR_MSG_H_SIZE))
1434 skb_push(buf, DIR_MSG_H_SIZE);
1435 skb_copy_to_linear_data(buf, msg, DIR_MSG_H_SIZE);
1436 msg_dbg(msg, "buf2port: ");
1438 if (dest->node == tipc_own_addr)
1439 return tipc_port_recv_msg(buf);
1440 res = tipc_send_buf_fast(buf, dest->node);
1441 if (likely(res != -ELINKCONG))
1443 if (port_unreliable(p_ptr))
1449 * tipc_send_buf2port - send message buffer to port identity
1452 int tipc_send_buf2port(u32 ref,
1453 struct tipc_portid const *dest,
1454 struct sk_buff *buf,
1457 struct tipc_portid orig;
1460 orig.node = tipc_own_addr;
1461 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1462 TIPC_PORT_IMPORTANCE);