2 * net/tipc/port.c: TIPC port code
4 * Copyright (c) 1992-2007, Ericsson AB
5 * Copyright (c) 2004-2007, 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 = 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 port reference, or 0 if unable to create it
218 * Note: The newly created port is returned in the locked state.
221 u32 tipc_createport_raw(void *usr_handle,
222 u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
223 void (*wakeup)(struct tipc_port *),
224 const u32 importance,
225 struct tipc_port **tp_ptr)
228 struct tipc_msg *msg;
231 p_ptr = kzalloc(sizeof(*p_ptr), GFP_ATOMIC);
233 warn("Port creation failed, no memory\n");
236 ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
238 warn("Port creation failed, reference table exhausted\n");
243 p_ptr->publ.usr_handle = usr_handle;
244 p_ptr->publ.max_pkt = MAX_PKT_DEFAULT;
245 p_ptr->publ.ref = ref;
246 msg = &p_ptr->publ.phdr;
247 msg_init(msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, TIPC_OK, LONG_H_SIZE,
249 msg_set_orignode(msg, tipc_own_addr);
250 msg_set_prevnode(msg, tipc_own_addr);
251 msg_set_origport(msg, ref);
252 msg_set_importance(msg,importance);
253 p_ptr->last_in_seqno = 41;
255 INIT_LIST_HEAD(&p_ptr->wait_list);
256 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
257 p_ptr->congested_link = NULL;
258 p_ptr->dispatcher = dispatcher;
259 p_ptr->wakeup = wakeup;
260 p_ptr->user_port = NULL;
261 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
262 spin_lock_bh(&tipc_port_list_lock);
263 INIT_LIST_HEAD(&p_ptr->publications);
264 INIT_LIST_HEAD(&p_ptr->port_list);
265 list_add_tail(&p_ptr->port_list, &ports);
266 spin_unlock_bh(&tipc_port_list_lock);
267 *tp_ptr = &p_ptr->publ;
271 int tipc_deleteport(u32 ref)
274 struct sk_buff *buf = NULL;
276 tipc_withdraw(ref, 0, NULL);
277 p_ptr = tipc_port_lock(ref);
281 tipc_ref_discard(ref);
282 tipc_port_unlock(p_ptr);
284 k_cancel_timer(&p_ptr->timer);
285 if (p_ptr->publ.connected) {
286 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
287 tipc_nodesub_unsubscribe(&p_ptr->subscription);
289 if (p_ptr->user_port) {
290 tipc_reg_remove_port(p_ptr->user_port);
291 kfree(p_ptr->user_port);
294 spin_lock_bh(&tipc_port_list_lock);
295 list_del(&p_ptr->port_list);
296 list_del(&p_ptr->wait_list);
297 spin_unlock_bh(&tipc_port_list_lock);
298 k_term_timer(&p_ptr->timer);
300 dbg("Deleted port %u\n", ref);
301 tipc_net_route_msg(buf);
306 * tipc_get_port() - return port associated with 'ref'
308 * Note: Port is not locked.
311 struct tipc_port *tipc_get_port(const u32 ref)
313 return (struct tipc_port *)tipc_ref_deref(ref);
317 * tipc_get_handle - return user handle associated to port 'ref'
320 void *tipc_get_handle(const u32 ref)
325 p_ptr = tipc_port_lock(ref);
328 handle = p_ptr->publ.usr_handle;
329 tipc_port_unlock(p_ptr);
333 static int port_unreliable(struct port *p_ptr)
335 return msg_src_droppable(&p_ptr->publ.phdr);
338 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
342 p_ptr = tipc_port_lock(ref);
345 *isunreliable = port_unreliable(p_ptr);
346 tipc_port_unlock(p_ptr);
350 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
354 p_ptr = tipc_port_lock(ref);
357 msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
358 tipc_port_unlock(p_ptr);
362 static int port_unreturnable(struct port *p_ptr)
364 return msg_dest_droppable(&p_ptr->publ.phdr);
367 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
371 p_ptr = tipc_port_lock(ref);
374 *isunrejectable = port_unreturnable(p_ptr);
375 tipc_port_unlock(p_ptr);
379 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
383 p_ptr = tipc_port_lock(ref);
386 msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
387 tipc_port_unlock(p_ptr);
392 * port_build_proto_msg(): build a port level protocol
393 * or a connection abortion message. Called with
396 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
397 u32 origport, u32 orignode,
398 u32 usr, u32 type, u32 err,
402 struct tipc_msg *msg;
404 buf = buf_acquire(LONG_H_SIZE);
407 msg_init(msg, usr, type, err, LONG_H_SIZE, destnode);
408 msg_set_destport(msg, destport);
409 msg_set_origport(msg, origport);
410 msg_set_destnode(msg, destnode);
411 msg_set_orignode(msg, orignode);
412 msg_set_transp_seqno(msg, seqno);
413 msg_set_msgcnt(msg, ack);
414 msg_dbg(msg, "PORT>SEND>:");
419 int tipc_reject_msg(struct sk_buff *buf, u32 err)
421 struct tipc_msg *msg = buf_msg(buf);
422 struct sk_buff *rbuf;
423 struct tipc_msg *rmsg;
425 u32 imp = msg_importance(msg);
426 u32 data_sz = msg_data_sz(msg);
428 if (data_sz > MAX_REJECT_SIZE)
429 data_sz = MAX_REJECT_SIZE;
430 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
432 msg_dbg(msg, "port->rej: ");
434 /* discard rejected message if it shouldn't be returned to sender */
435 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
440 /* construct rejected message */
442 hdr_sz = MCAST_H_SIZE;
444 hdr_sz = LONG_H_SIZE;
445 rbuf = buf_acquire(data_sz + hdr_sz);
450 rmsg = buf_msg(rbuf);
451 msg_init(rmsg, imp, msg_type(msg), err, hdr_sz, msg_orignode(msg));
452 msg_set_destport(rmsg, msg_origport(msg));
453 msg_set_prevnode(rmsg, tipc_own_addr);
454 msg_set_origport(rmsg, msg_destport(msg));
456 msg_set_orignode(rmsg, tipc_own_addr);
458 msg_set_orignode(rmsg, msg_destnode(msg));
459 msg_set_size(rmsg, data_sz + hdr_sz);
460 msg_set_nametype(rmsg, msg_nametype(msg));
461 msg_set_nameinst(rmsg, msg_nameinst(msg));
462 skb_copy_to_linear_data_offset(rbuf, hdr_sz, msg_data(msg), data_sz);
464 /* send self-abort message when rejecting on a connected port */
465 if (msg_connected(msg)) {
466 struct sk_buff *abuf = NULL;
467 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
470 if (p_ptr->publ.connected)
471 abuf = port_build_self_abort_msg(p_ptr, err);
472 tipc_port_unlock(p_ptr);
474 tipc_net_route_msg(abuf);
477 /* send rejected message */
479 tipc_net_route_msg(rbuf);
483 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
484 struct iovec const *msg_sect, u32 num_sect,
490 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
491 !p_ptr->user_port, &buf);
495 return tipc_reject_msg(buf, err);
498 static void port_timeout(unsigned long ref)
500 struct port *p_ptr = tipc_port_lock(ref);
501 struct sk_buff *buf = NULL;
506 if (!p_ptr->publ.connected) {
507 tipc_port_unlock(p_ptr);
511 /* Last probe answered ? */
512 if (p_ptr->probing_state == PROBING) {
513 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
515 buf = port_build_proto_msg(port_peerport(p_ptr),
516 port_peernode(p_ptr),
522 port_out_seqno(p_ptr),
524 port_incr_out_seqno(p_ptr);
525 p_ptr->probing_state = PROBING;
526 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
528 tipc_port_unlock(p_ptr);
529 tipc_net_route_msg(buf);
533 static void port_handle_node_down(unsigned long ref)
535 struct port *p_ptr = tipc_port_lock(ref);
536 struct sk_buff* buf = NULL;
540 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
541 tipc_port_unlock(p_ptr);
542 tipc_net_route_msg(buf);
546 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
548 u32 imp = msg_importance(&p_ptr->publ.phdr);
550 if (!p_ptr->publ.connected)
552 if (imp < TIPC_CRITICAL_IMPORTANCE)
554 return port_build_proto_msg(p_ptr->publ.ref,
556 port_peerport(p_ptr),
557 port_peernode(p_ptr),
561 p_ptr->last_in_seqno + 1,
566 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
568 u32 imp = msg_importance(&p_ptr->publ.phdr);
570 if (!p_ptr->publ.connected)
572 if (imp < TIPC_CRITICAL_IMPORTANCE)
574 return port_build_proto_msg(port_peerport(p_ptr),
575 port_peernode(p_ptr),
581 port_out_seqno(p_ptr),
585 void tipc_port_recv_proto_msg(struct sk_buff *buf)
587 struct tipc_msg *msg = buf_msg(buf);
588 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
590 struct sk_buff *r_buf = NULL;
591 struct sk_buff *abort_buf = NULL;
593 msg_dbg(msg, "PORT<RECV<:");
596 err = TIPC_ERR_NO_PORT;
597 } else if (p_ptr->publ.connected) {
598 if (port_peernode(p_ptr) != msg_orignode(msg))
599 err = TIPC_ERR_NO_PORT;
600 if (port_peerport(p_ptr) != msg_origport(msg))
601 err = TIPC_ERR_NO_PORT;
602 if (!err && msg_routed(msg)) {
603 u32 seqno = msg_transp_seqno(msg);
604 u32 myno = ++p_ptr->last_in_seqno;
606 err = TIPC_ERR_NO_PORT;
607 abort_buf = port_build_self_abort_msg(p_ptr, err);
610 if (msg_type(msg) == CONN_ACK) {
611 int wakeup = tipc_port_congested(p_ptr) &&
612 p_ptr->publ.congested &&
614 p_ptr->acked += msg_msgcnt(msg);
615 if (tipc_port_congested(p_ptr))
617 p_ptr->publ.congested = 0;
620 p_ptr->wakeup(&p_ptr->publ);
623 } else if (p_ptr->publ.published) {
624 err = TIPC_ERR_NO_PORT;
627 r_buf = port_build_proto_msg(msg_origport(msg),
631 TIPC_HIGH_IMPORTANCE,
640 if (msg_type(msg) == CONN_PROBE) {
641 r_buf = port_build_proto_msg(msg_origport(msg),
648 port_out_seqno(p_ptr),
651 p_ptr->probing_state = CONFIRMED;
652 port_incr_out_seqno(p_ptr);
655 tipc_port_unlock(p_ptr);
656 tipc_net_route_msg(r_buf);
657 tipc_net_route_msg(abort_buf);
661 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
663 struct publication *publ;
666 tipc_printf(buf, "<%u.%u.%u:%u>:",
667 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
668 tipc_node(tipc_own_addr), p_ptr->publ.ref);
670 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
672 if (p_ptr->publ.connected) {
673 u32 dport = port_peerport(p_ptr);
674 u32 destnode = port_peernode(p_ptr);
676 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
677 tipc_zone(destnode), tipc_cluster(destnode),
678 tipc_node(destnode), dport);
679 if (p_ptr->publ.conn_type != 0)
680 tipc_printf(buf, " via {%u,%u}",
681 p_ptr->publ.conn_type,
682 p_ptr->publ.conn_instance);
684 else if (p_ptr->publ.published) {
685 tipc_printf(buf, " bound to");
686 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
687 if (publ->lower == publ->upper)
688 tipc_printf(buf, " {%u,%u}", publ->type,
691 tipc_printf(buf, " {%u,%u,%u}", publ->type,
692 publ->lower, publ->upper);
695 tipc_printf(buf, "\n");
698 #define MAX_PORT_QUERY 32768
700 struct sk_buff *tipc_port_get_ports(void)
703 struct tlv_desc *rep_tlv;
708 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
711 rep_tlv = (struct tlv_desc *)buf->data;
713 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
714 spin_lock_bh(&tipc_port_list_lock);
715 list_for_each_entry(p_ptr, &ports, port_list) {
716 spin_lock_bh(p_ptr->publ.lock);
717 port_print(p_ptr, &pb, 0);
718 spin_unlock_bh(p_ptr->publ.lock);
720 spin_unlock_bh(&tipc_port_list_lock);
721 str_len = tipc_printbuf_validate(&pb);
723 skb_put(buf, TLV_SPACE(str_len));
724 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
731 #define MAX_PORT_STATS 2000
733 struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space)
738 struct tlv_desc *rep_tlv;
742 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_PORT_REF))
743 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
745 ref = *(u32 *)TLV_DATA(req_tlv_area);
748 p_ptr = tipc_port_lock(ref);
750 return cfg_reply_error_string("port not found");
752 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_STATS));
754 tipc_port_unlock(p_ptr);
757 rep_tlv = (struct tlv_desc *)buf->data;
759 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_STATS);
760 port_print(p_ptr, &pb, 1);
761 /* NEED TO FILL IN ADDITIONAL PORT STATISTICS HERE */
762 tipc_port_unlock(p_ptr);
763 str_len = tipc_printbuf_validate(&pb);
765 skb_put(buf, TLV_SPACE(str_len));
766 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
773 void tipc_port_reinit(void)
776 struct tipc_msg *msg;
778 spin_lock_bh(&tipc_port_list_lock);
779 list_for_each_entry(p_ptr, &ports, port_list) {
780 msg = &p_ptr->publ.phdr;
781 if (msg_orignode(msg) == tipc_own_addr)
783 msg_set_orignode(msg, tipc_own_addr);
785 spin_unlock_bh(&tipc_port_list_lock);
790 * port_dispatcher_sigh(): Signal handler for messages destinated
791 * to the tipc_port interface.
794 static void port_dispatcher_sigh(void *dummy)
798 spin_lock_bh(&queue_lock);
799 buf = msg_queue_head;
800 msg_queue_head = NULL;
801 spin_unlock_bh(&queue_lock);
805 struct user_port *up_ptr;
806 struct tipc_portid orig;
807 struct tipc_name_seq dseq;
813 struct sk_buff *next = buf->next;
814 struct tipc_msg *msg = buf_msg(buf);
815 u32 dref = msg_destport(msg);
817 message_type = msg_type(msg);
818 if (message_type > TIPC_DIRECT_MSG)
819 goto reject; /* Unsupported message type */
821 p_ptr = tipc_port_lock(dref);
823 goto reject; /* Port deleted while msg in queue */
825 orig.ref = msg_origport(msg);
826 orig.node = msg_orignode(msg);
827 up_ptr = p_ptr->user_port;
828 usr_handle = up_ptr->usr_handle;
829 connected = p_ptr->publ.connected;
830 published = p_ptr->publ.published;
832 if (unlikely(msg_errcode(msg)))
835 switch (message_type) {
838 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
839 u32 peer_port = port_peerport(p_ptr);
840 u32 peer_node = port_peernode(p_ptr);
842 tipc_port_unlock(p_ptr);
843 if (unlikely(!connected)) {
844 if (unlikely(published))
846 tipc_connect2port(dref,&orig);
848 if (unlikely(msg_origport(msg) != peer_port))
850 if (unlikely(msg_orignode(msg) != peer_node))
854 if (unlikely(++p_ptr->publ.conn_unacked >=
855 TIPC_FLOW_CONTROL_WIN))
856 tipc_acknowledge(dref,
857 p_ptr->publ.conn_unacked);
858 skb_pull(buf, msg_hdr_sz(msg));
859 cb(usr_handle, dref, &buf, msg_data(msg),
863 case TIPC_DIRECT_MSG:{
864 tipc_msg_event cb = up_ptr->msg_cb;
866 tipc_port_unlock(p_ptr);
867 if (unlikely(connected))
871 skb_pull(buf, msg_hdr_sz(msg));
872 cb(usr_handle, dref, &buf, msg_data(msg),
873 msg_data_sz(msg), msg_importance(msg),
878 case TIPC_NAMED_MSG:{
879 tipc_named_msg_event cb = up_ptr->named_msg_cb;
881 tipc_port_unlock(p_ptr);
882 if (unlikely(connected))
886 if (unlikely(!published))
888 dseq.type = msg_nametype(msg);
889 dseq.lower = msg_nameinst(msg);
890 dseq.upper = (message_type == TIPC_NAMED_MSG)
891 ? dseq.lower : msg_nameupper(msg);
892 skb_pull(buf, msg_hdr_sz(msg));
893 cb(usr_handle, dref, &buf, msg_data(msg),
894 msg_data_sz(msg), msg_importance(msg),
904 switch (message_type) {
907 tipc_conn_shutdown_event cb =
909 u32 peer_port = port_peerport(p_ptr);
910 u32 peer_node = port_peernode(p_ptr);
912 tipc_port_unlock(p_ptr);
913 if (!connected || !cb)
915 if (msg_origport(msg) != peer_port)
917 if (msg_orignode(msg) != peer_node)
919 tipc_disconnect(dref);
920 skb_pull(buf, msg_hdr_sz(msg));
921 cb(usr_handle, dref, &buf, msg_data(msg),
922 msg_data_sz(msg), msg_errcode(msg));
925 case TIPC_DIRECT_MSG:{
926 tipc_msg_err_event cb = up_ptr->err_cb;
928 tipc_port_unlock(p_ptr);
929 if (connected || !cb)
931 skb_pull(buf, msg_hdr_sz(msg));
932 cb(usr_handle, dref, &buf, msg_data(msg),
933 msg_data_sz(msg), msg_errcode(msg), &orig);
937 case TIPC_NAMED_MSG:{
938 tipc_named_msg_err_event cb =
939 up_ptr->named_err_cb;
941 tipc_port_unlock(p_ptr);
942 if (connected || !cb)
944 dseq.type = msg_nametype(msg);
945 dseq.lower = msg_nameinst(msg);
946 dseq.upper = (message_type == TIPC_NAMED_MSG)
947 ? dseq.lower : msg_nameupper(msg);
948 skb_pull(buf, msg_hdr_sz(msg));
949 cb(usr_handle, dref, &buf, msg_data(msg),
950 msg_data_sz(msg), msg_errcode(msg), &dseq);
959 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
965 * port_dispatcher(): Dispatcher for messages destinated
966 * to the tipc_port interface. Called with port locked.
969 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
972 spin_lock_bh(&queue_lock);
973 if (msg_queue_head) {
974 msg_queue_tail->next = buf;
975 msg_queue_tail = buf;
977 msg_queue_tail = msg_queue_head = buf;
978 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
980 spin_unlock_bh(&queue_lock);
985 * Wake up port after congestion: Called with port locked,
989 static void port_wakeup_sh(unsigned long ref)
992 struct user_port *up_ptr;
993 tipc_continue_event cb = NULL;
996 p_ptr = tipc_port_lock(ref);
998 up_ptr = p_ptr->user_port;
1000 cb = up_ptr->continue_event_cb;
1001 uh = up_ptr->usr_handle;
1003 tipc_port_unlock(p_ptr);
1010 static void port_wakeup(struct tipc_port *p_ptr)
1012 tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
1015 void tipc_acknowledge(u32 ref, u32 ack)
1018 struct sk_buff *buf = NULL;
1020 p_ptr = tipc_port_lock(ref);
1023 if (p_ptr->publ.connected) {
1024 p_ptr->publ.conn_unacked -= ack;
1025 buf = port_build_proto_msg(port_peerport(p_ptr),
1026 port_peernode(p_ptr),
1032 port_out_seqno(p_ptr),
1035 tipc_port_unlock(p_ptr);
1036 tipc_net_route_msg(buf);
1040 * tipc_createport(): user level call. Will add port to
1041 * registry if non-zero user_ref.
1044 int tipc_createport(u32 user_ref,
1046 unsigned int importance,
1047 tipc_msg_err_event error_cb,
1048 tipc_named_msg_err_event named_error_cb,
1049 tipc_conn_shutdown_event conn_error_cb,
1050 tipc_msg_event msg_cb,
1051 tipc_named_msg_event named_msg_cb,
1052 tipc_conn_msg_event conn_msg_cb,
1053 tipc_continue_event continue_event_cb,/* May be zero */
1056 struct user_port *up_ptr;
1058 struct tipc_port *tp_ptr;
1061 up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
1063 warn("Port creation failed, no memory\n");
1066 ref = tipc_createport_raw(NULL, port_dispatcher, port_wakeup,
1067 importance, &tp_ptr);
1072 p_ptr = (struct port *)tp_ptr;
1074 p_ptr->user_port = up_ptr;
1075 up_ptr->user_ref = user_ref;
1076 up_ptr->usr_handle = usr_handle;
1077 up_ptr->ref = p_ptr->publ.ref;
1078 up_ptr->err_cb = error_cb;
1079 up_ptr->named_err_cb = named_error_cb;
1080 up_ptr->conn_err_cb = conn_error_cb;
1081 up_ptr->msg_cb = msg_cb;
1082 up_ptr->named_msg_cb = named_msg_cb;
1083 up_ptr->conn_msg_cb = conn_msg_cb;
1084 up_ptr->continue_event_cb = continue_event_cb;
1085 INIT_LIST_HEAD(&up_ptr->uport_list);
1086 tipc_reg_add_port(up_ptr);
1087 *portref = p_ptr->publ.ref;
1088 dbg(" tipc_createport: %x with ref %u\n", p_ptr, p_ptr->publ.ref);
1089 tipc_port_unlock(p_ptr);
1093 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
1096 id->node = tipc_own_addr;
1100 int tipc_portimportance(u32 ref, unsigned int *importance)
1104 p_ptr = tipc_port_lock(ref);
1107 *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1108 tipc_port_unlock(p_ptr);
1112 int tipc_set_portimportance(u32 ref, unsigned int imp)
1116 if (imp > TIPC_CRITICAL_IMPORTANCE)
1119 p_ptr = tipc_port_lock(ref);
1122 msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1123 tipc_port_unlock(p_ptr);
1128 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1131 struct publication *publ;
1135 p_ptr = tipc_port_lock(ref);
1139 dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1140 "lower = %u, upper = %u\n",
1141 ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1142 if (p_ptr->publ.connected)
1144 if (seq->lower > seq->upper)
1146 if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1148 key = ref + p_ptr->pub_count + 1;
1153 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1154 scope, p_ptr->publ.ref, key);
1156 list_add(&publ->pport_list, &p_ptr->publications);
1158 p_ptr->publ.published = 1;
1162 tipc_port_unlock(p_ptr);
1166 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1169 struct publication *publ;
1170 struct publication *tpubl;
1173 p_ptr = tipc_port_lock(ref);
1177 list_for_each_entry_safe(publ, tpubl,
1178 &p_ptr->publications, pport_list) {
1179 tipc_nametbl_withdraw(publ->type, publ->lower,
1180 publ->ref, publ->key);
1184 list_for_each_entry_safe(publ, tpubl,
1185 &p_ptr->publications, pport_list) {
1186 if (publ->scope != scope)
1188 if (publ->type != seq->type)
1190 if (publ->lower != seq->lower)
1192 if (publ->upper != seq->upper)
1194 tipc_nametbl_withdraw(publ->type, publ->lower,
1195 publ->ref, publ->key);
1200 if (list_empty(&p_ptr->publications))
1201 p_ptr->publ.published = 0;
1202 tipc_port_unlock(p_ptr);
1206 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1209 struct tipc_msg *msg;
1212 p_ptr = tipc_port_lock(ref);
1215 if (p_ptr->publ.published || p_ptr->publ.connected)
1220 msg = &p_ptr->publ.phdr;
1221 msg_set_destnode(msg, peer->node);
1222 msg_set_destport(msg, peer->ref);
1223 msg_set_orignode(msg, tipc_own_addr);
1224 msg_set_origport(msg, p_ptr->publ.ref);
1225 msg_set_transp_seqno(msg, 42);
1226 msg_set_type(msg, TIPC_CONN_MSG);
1227 if (!may_route(peer->node))
1228 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1230 msg_set_hdr_sz(msg, LONG_H_SIZE);
1232 p_ptr->probing_interval = PROBING_INTERVAL;
1233 p_ptr->probing_state = CONFIRMED;
1234 p_ptr->publ.connected = 1;
1235 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1237 tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1238 (void *)(unsigned long)ref,
1239 (net_ev_handler)port_handle_node_down);
1242 tipc_port_unlock(p_ptr);
1243 p_ptr->publ.max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1248 * tipc_disconnect_port - disconnect port from peer
1250 * Port must be locked.
1253 int tipc_disconnect_port(struct tipc_port *tp_ptr)
1257 if (tp_ptr->connected) {
1258 tp_ptr->connected = 0;
1259 /* let timer expire on it's own to avoid deadlock! */
1260 tipc_nodesub_unsubscribe(
1261 &((struct port *)tp_ptr)->subscription);
1270 * tipc_disconnect(): Disconnect port form peer.
1271 * This is a node local operation.
1274 int tipc_disconnect(u32 ref)
1279 p_ptr = tipc_port_lock(ref);
1282 res = tipc_disconnect_port((struct tipc_port *)p_ptr);
1283 tipc_port_unlock(p_ptr);
1288 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1290 int tipc_shutdown(u32 ref)
1293 struct sk_buff *buf = NULL;
1295 p_ptr = tipc_port_lock(ref);
1299 if (p_ptr->publ.connected) {
1300 u32 imp = msg_importance(&p_ptr->publ.phdr);
1301 if (imp < TIPC_CRITICAL_IMPORTANCE)
1303 buf = port_build_proto_msg(port_peerport(p_ptr),
1304 port_peernode(p_ptr),
1310 port_out_seqno(p_ptr),
1313 tipc_port_unlock(p_ptr);
1314 tipc_net_route_msg(buf);
1315 return tipc_disconnect(ref);
1318 int tipc_isconnected(u32 ref, int *isconnected)
1322 p_ptr = tipc_port_lock(ref);
1325 *isconnected = p_ptr->publ.connected;
1326 tipc_port_unlock(p_ptr);
1330 int tipc_peer(u32 ref, struct tipc_portid *peer)
1335 p_ptr = tipc_port_lock(ref);
1338 if (p_ptr->publ.connected) {
1339 peer->ref = port_peerport(p_ptr);
1340 peer->node = port_peernode(p_ptr);
1344 tipc_port_unlock(p_ptr);
1348 int tipc_ref_valid(u32 ref)
1350 /* Works irrespective of type */
1351 return !!tipc_ref_deref(ref);
1356 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1357 * message for this node.
1360 int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1361 struct iovec const *msg_sect)
1363 struct sk_buff *buf;
1366 res = msg_build(&sender->publ.phdr, msg_sect, num_sect,
1367 MAX_MSG_SIZE, !sender->user_port, &buf);
1369 tipc_port_recv_msg(buf);
1374 * tipc_send - send message sections on connection
1377 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1383 p_ptr = tipc_port_deref(ref);
1384 if (!p_ptr || !p_ptr->publ.connected)
1387 p_ptr->publ.congested = 1;
1388 if (!tipc_port_congested(p_ptr)) {
1389 destnode = port_peernode(p_ptr);
1390 if (likely(destnode != tipc_own_addr))
1391 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1394 res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1396 if (likely(res != -ELINKCONG)) {
1397 port_incr_out_seqno(p_ptr);
1398 p_ptr->publ.congested = 0;
1403 if (port_unreliable(p_ptr)) {
1404 p_ptr->publ.congested = 0;
1405 /* Just calculate msg length and return */
1406 return msg_calc_data_size(msg_sect, num_sect);
1412 * tipc_send_buf - send message buffer on connection
1415 int tipc_send_buf(u32 ref, struct sk_buff *buf, unsigned int dsz)
1418 struct tipc_msg *msg;
1424 p_ptr = tipc_port_deref(ref);
1425 if (!p_ptr || !p_ptr->publ.connected)
1428 msg = &p_ptr->publ.phdr;
1429 hsz = msg_hdr_sz(msg);
1431 msg_set_size(msg, sz);
1432 if (skb_cow(buf, hsz))
1436 skb_copy_to_linear_data(buf, msg, hsz);
1437 destnode = msg_destnode(msg);
1438 p_ptr->publ.congested = 1;
1439 if (!tipc_port_congested(p_ptr)) {
1440 if (likely(destnode != tipc_own_addr))
1441 res = tipc_send_buf_fast(buf, destnode);
1443 tipc_port_recv_msg(buf);
1446 if (likely(res != -ELINKCONG)) {
1447 port_incr_out_seqno(p_ptr);
1449 p_ptr->publ.congested = 0;
1453 if (port_unreliable(p_ptr)) {
1454 p_ptr->publ.congested = 0;
1461 * tipc_forward2name - forward message sections to port name
1464 int tipc_forward2name(u32 ref,
1465 struct tipc_name const *name,
1468 struct iovec const *msg_sect,
1469 struct tipc_portid const *orig,
1470 unsigned int importance)
1473 struct tipc_msg *msg;
1474 u32 destnode = domain;
1478 p_ptr = tipc_port_deref(ref);
1479 if (!p_ptr || p_ptr->publ.connected)
1482 msg = &p_ptr->publ.phdr;
1483 msg_set_type(msg, TIPC_NAMED_MSG);
1484 msg_set_orignode(msg, orig->node);
1485 msg_set_origport(msg, orig->ref);
1486 msg_set_hdr_sz(msg, LONG_H_SIZE);
1487 msg_set_nametype(msg, name->type);
1488 msg_set_nameinst(msg, name->instance);
1489 msg_set_lookup_scope(msg, addr_scope(domain));
1490 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1491 msg_set_importance(msg,importance);
1492 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1493 msg_set_destnode(msg, destnode);
1494 msg_set_destport(msg, destport);
1496 if (likely(destport || destnode)) {
1498 if (likely(destnode == tipc_own_addr))
1499 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1500 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1502 if (likely(res != -ELINKCONG))
1504 if (port_unreliable(p_ptr)) {
1505 /* Just calculate msg length and return */
1506 return msg_calc_data_size(msg_sect, num_sect);
1510 return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1515 * tipc_send2name - send message sections to port name
1518 int tipc_send2name(u32 ref,
1519 struct tipc_name const *name,
1520 unsigned int domain,
1521 unsigned int num_sect,
1522 struct iovec const *msg_sect)
1524 struct tipc_portid orig;
1527 orig.node = tipc_own_addr;
1528 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1529 TIPC_PORT_IMPORTANCE);
1533 * tipc_forward_buf2name - forward message buffer to port name
1536 int tipc_forward_buf2name(u32 ref,
1537 struct tipc_name const *name,
1539 struct sk_buff *buf,
1541 struct tipc_portid const *orig,
1542 unsigned int importance)
1545 struct tipc_msg *msg;
1546 u32 destnode = domain;
1550 p_ptr = (struct port *)tipc_ref_deref(ref);
1551 if (!p_ptr || p_ptr->publ.connected)
1554 msg = &p_ptr->publ.phdr;
1555 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1556 msg_set_importance(msg, importance);
1557 msg_set_type(msg, TIPC_NAMED_MSG);
1558 msg_set_orignode(msg, orig->node);
1559 msg_set_origport(msg, orig->ref);
1560 msg_set_nametype(msg, name->type);
1561 msg_set_nameinst(msg, name->instance);
1562 msg_set_lookup_scope(msg, addr_scope(domain));
1563 msg_set_hdr_sz(msg, LONG_H_SIZE);
1564 msg_set_size(msg, LONG_H_SIZE + dsz);
1565 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1566 msg_set_destnode(msg, destnode);
1567 msg_set_destport(msg, destport);
1568 msg_dbg(msg, "forw2name ==> ");
1569 if (skb_cow(buf, LONG_H_SIZE))
1571 skb_push(buf, LONG_H_SIZE);
1572 skb_copy_to_linear_data(buf, msg, LONG_H_SIZE);
1573 msg_dbg(buf_msg(buf),"PREP:");
1574 if (likely(destport || destnode)) {
1576 if (destnode == tipc_own_addr)
1577 return tipc_port_recv_msg(buf);
1578 res = tipc_send_buf_fast(buf, destnode);
1579 if (likely(res != -ELINKCONG))
1581 if (port_unreliable(p_ptr))
1585 return tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
1589 * tipc_send_buf2name - send message buffer to port name
1592 int tipc_send_buf2name(u32 ref,
1593 struct tipc_name const *dest,
1595 struct sk_buff *buf,
1598 struct tipc_portid orig;
1601 orig.node = tipc_own_addr;
1602 return tipc_forward_buf2name(ref, dest, domain, buf, dsz, &orig,
1603 TIPC_PORT_IMPORTANCE);
1607 * tipc_forward2port - forward message sections to port identity
1610 int tipc_forward2port(u32 ref,
1611 struct tipc_portid const *dest,
1612 unsigned int num_sect,
1613 struct iovec const *msg_sect,
1614 struct tipc_portid const *orig,
1615 unsigned int importance)
1618 struct tipc_msg *msg;
1621 p_ptr = tipc_port_deref(ref);
1622 if (!p_ptr || p_ptr->publ.connected)
1625 msg = &p_ptr->publ.phdr;
1626 msg_set_type(msg, TIPC_DIRECT_MSG);
1627 msg_set_orignode(msg, orig->node);
1628 msg_set_origport(msg, orig->ref);
1629 msg_set_destnode(msg, dest->node);
1630 msg_set_destport(msg, dest->ref);
1631 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1632 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1633 msg_set_importance(msg, importance);
1635 if (dest->node == tipc_own_addr)
1636 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1637 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1638 if (likely(res != -ELINKCONG))
1640 if (port_unreliable(p_ptr)) {
1641 /* Just calculate msg length and return */
1642 return msg_calc_data_size(msg_sect, num_sect);
1648 * tipc_send2port - send message sections to port identity
1651 int tipc_send2port(u32 ref,
1652 struct tipc_portid const *dest,
1653 unsigned int num_sect,
1654 struct iovec const *msg_sect)
1656 struct tipc_portid orig;
1659 orig.node = tipc_own_addr;
1660 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1661 TIPC_PORT_IMPORTANCE);
1665 * tipc_forward_buf2port - forward message buffer to port identity
1667 int tipc_forward_buf2port(u32 ref,
1668 struct tipc_portid const *dest,
1669 struct sk_buff *buf,
1671 struct tipc_portid const *orig,
1672 unsigned int importance)
1675 struct tipc_msg *msg;
1678 p_ptr = (struct port *)tipc_ref_deref(ref);
1679 if (!p_ptr || p_ptr->publ.connected)
1682 msg = &p_ptr->publ.phdr;
1683 msg_set_type(msg, TIPC_DIRECT_MSG);
1684 msg_set_orignode(msg, orig->node);
1685 msg_set_origport(msg, orig->ref);
1686 msg_set_destnode(msg, dest->node);
1687 msg_set_destport(msg, dest->ref);
1688 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1689 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1690 msg_set_importance(msg, importance);
1691 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1692 if (skb_cow(buf, DIR_MSG_H_SIZE))
1695 skb_push(buf, DIR_MSG_H_SIZE);
1696 skb_copy_to_linear_data(buf, msg, DIR_MSG_H_SIZE);
1697 msg_dbg(msg, "buf2port: ");
1699 if (dest->node == tipc_own_addr)
1700 return tipc_port_recv_msg(buf);
1701 res = tipc_send_buf_fast(buf, dest->node);
1702 if (likely(res != -ELINKCONG))
1704 if (port_unreliable(p_ptr))
1710 * tipc_send_buf2port - send message buffer to port identity
1713 int tipc_send_buf2port(u32 ref,
1714 struct tipc_portid const *dest,
1715 struct sk_buff *buf,
1718 struct tipc_portid orig;
1721 orig.node = tipc_own_addr;
1722 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1723 TIPC_PORT_IMPORTANCE);