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 native TIPC port
216 * Returns local port reference
219 u32 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");
241 p_ptr->publ.usr_handle = usr_handle;
242 p_ptr->publ.max_pkt = MAX_PKT_DEFAULT;
243 p_ptr->publ.ref = ref;
244 msg = &p_ptr->publ.phdr;
245 msg_init(msg, DATA_LOW, TIPC_NAMED_MSG, TIPC_OK, LONG_H_SIZE, 0);
246 msg_set_orignode(msg, tipc_own_addr);
247 msg_set_prevnode(msg, tipc_own_addr);
248 msg_set_origport(msg, ref);
249 msg_set_importance(msg,importance);
250 p_ptr->last_in_seqno = 41;
252 INIT_LIST_HEAD(&p_ptr->wait_list);
253 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
254 p_ptr->congested_link = NULL;
255 p_ptr->dispatcher = dispatcher;
256 p_ptr->wakeup = wakeup;
257 p_ptr->user_port = NULL;
258 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
259 spin_lock_bh(&tipc_port_list_lock);
260 INIT_LIST_HEAD(&p_ptr->publications);
261 INIT_LIST_HEAD(&p_ptr->port_list);
262 list_add_tail(&p_ptr->port_list, &ports);
263 spin_unlock_bh(&tipc_port_list_lock);
264 tipc_port_unlock(p_ptr);
268 int tipc_deleteport(u32 ref)
271 struct sk_buff *buf = NULL;
273 tipc_withdraw(ref, 0, NULL);
274 p_ptr = tipc_port_lock(ref);
278 tipc_ref_discard(ref);
279 tipc_port_unlock(p_ptr);
281 k_cancel_timer(&p_ptr->timer);
282 if (p_ptr->publ.connected) {
283 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
284 tipc_nodesub_unsubscribe(&p_ptr->subscription);
286 if (p_ptr->user_port) {
287 tipc_reg_remove_port(p_ptr->user_port);
288 kfree(p_ptr->user_port);
291 spin_lock_bh(&tipc_port_list_lock);
292 list_del(&p_ptr->port_list);
293 list_del(&p_ptr->wait_list);
294 spin_unlock_bh(&tipc_port_list_lock);
295 k_term_timer(&p_ptr->timer);
297 dbg("Deleted port %u\n", ref);
298 tipc_net_route_msg(buf);
303 * tipc_get_port() - return port associated with 'ref'
305 * Note: Port is not locked.
308 struct tipc_port *tipc_get_port(const u32 ref)
310 return (struct tipc_port *)tipc_ref_deref(ref);
314 * tipc_get_handle - return user handle associated to port 'ref'
317 void *tipc_get_handle(const u32 ref)
322 p_ptr = tipc_port_lock(ref);
325 handle = p_ptr->publ.usr_handle;
326 tipc_port_unlock(p_ptr);
330 static int port_unreliable(struct port *p_ptr)
332 return msg_src_droppable(&p_ptr->publ.phdr);
335 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
339 p_ptr = tipc_port_lock(ref);
342 *isunreliable = port_unreliable(p_ptr);
343 spin_unlock_bh(p_ptr->publ.lock);
347 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
351 p_ptr = tipc_port_lock(ref);
354 msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
355 tipc_port_unlock(p_ptr);
359 static int port_unreturnable(struct port *p_ptr)
361 return msg_dest_droppable(&p_ptr->publ.phdr);
364 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
368 p_ptr = tipc_port_lock(ref);
371 *isunrejectable = port_unreturnable(p_ptr);
372 spin_unlock_bh(p_ptr->publ.lock);
376 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
380 p_ptr = tipc_port_lock(ref);
383 msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
384 tipc_port_unlock(p_ptr);
389 * port_build_proto_msg(): build a port level protocol
390 * or a connection abortion message. Called with
393 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
394 u32 origport, u32 orignode,
395 u32 usr, u32 type, u32 err,
399 struct tipc_msg *msg;
401 buf = buf_acquire(LONG_H_SIZE);
404 msg_init(msg, usr, type, err, LONG_H_SIZE, destnode);
405 msg_set_destport(msg, destport);
406 msg_set_origport(msg, origport);
407 msg_set_destnode(msg, destnode);
408 msg_set_orignode(msg, orignode);
409 msg_set_transp_seqno(msg, seqno);
410 msg_set_msgcnt(msg, ack);
411 msg_dbg(msg, "PORT>SEND>:");
416 int tipc_set_msg_option(struct tipc_port *tp_ptr, const char *opt, const u32 sz)
418 msg_expand(&tp_ptr->phdr, msg_destnode(&tp_ptr->phdr));
419 msg_set_options(&tp_ptr->phdr, opt, sz);
423 int tipc_reject_msg(struct sk_buff *buf, u32 err)
425 struct tipc_msg *msg = buf_msg(buf);
426 struct sk_buff *rbuf;
427 struct tipc_msg *rmsg;
429 u32 imp = msg_importance(msg);
430 u32 data_sz = msg_data_sz(msg);
432 if (data_sz > MAX_REJECT_SIZE)
433 data_sz = MAX_REJECT_SIZE;
434 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
436 msg_dbg(msg, "port->rej: ");
438 /* discard rejected message if it shouldn't be returned to sender */
439 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
444 /* construct rejected message */
446 hdr_sz = MCAST_H_SIZE;
448 hdr_sz = LONG_H_SIZE;
449 rbuf = buf_acquire(data_sz + hdr_sz);
454 rmsg = buf_msg(rbuf);
455 msg_init(rmsg, imp, msg_type(msg), err, hdr_sz, msg_orignode(msg));
456 msg_set_destport(rmsg, msg_origport(msg));
457 msg_set_prevnode(rmsg, tipc_own_addr);
458 msg_set_origport(rmsg, msg_destport(msg));
460 msg_set_orignode(rmsg, tipc_own_addr);
462 msg_set_orignode(rmsg, msg_destnode(msg));
463 msg_set_size(rmsg, data_sz + hdr_sz);
464 msg_set_nametype(rmsg, msg_nametype(msg));
465 msg_set_nameinst(rmsg, msg_nameinst(msg));
466 skb_copy_to_linear_data_offset(rbuf, hdr_sz, msg_data(msg), data_sz);
468 /* send self-abort message when rejecting on a connected port */
469 if (msg_connected(msg)) {
470 struct sk_buff *abuf = NULL;
471 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
474 if (p_ptr->publ.connected)
475 abuf = port_build_self_abort_msg(p_ptr, err);
476 tipc_port_unlock(p_ptr);
478 tipc_net_route_msg(abuf);
481 /* send rejected message */
483 tipc_net_route_msg(rbuf);
487 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
488 struct iovec const *msg_sect, u32 num_sect,
494 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
495 !p_ptr->user_port, &buf);
499 return tipc_reject_msg(buf, err);
502 static void port_timeout(unsigned long ref)
504 struct port *p_ptr = tipc_port_lock(ref);
505 struct sk_buff *buf = NULL;
510 if (!p_ptr->publ.connected) {
511 tipc_port_unlock(p_ptr);
515 /* Last probe answered ? */
516 if (p_ptr->probing_state == PROBING) {
517 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
519 buf = port_build_proto_msg(port_peerport(p_ptr),
520 port_peernode(p_ptr),
526 port_out_seqno(p_ptr),
528 port_incr_out_seqno(p_ptr);
529 p_ptr->probing_state = PROBING;
530 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
532 tipc_port_unlock(p_ptr);
533 tipc_net_route_msg(buf);
537 static void port_handle_node_down(unsigned long ref)
539 struct port *p_ptr = tipc_port_lock(ref);
540 struct sk_buff* buf = NULL;
544 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
545 tipc_port_unlock(p_ptr);
546 tipc_net_route_msg(buf);
550 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
552 u32 imp = msg_importance(&p_ptr->publ.phdr);
554 if (!p_ptr->publ.connected)
556 if (imp < TIPC_CRITICAL_IMPORTANCE)
558 return port_build_proto_msg(p_ptr->publ.ref,
560 port_peerport(p_ptr),
561 port_peernode(p_ptr),
565 p_ptr->last_in_seqno + 1,
570 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
572 u32 imp = msg_importance(&p_ptr->publ.phdr);
574 if (!p_ptr->publ.connected)
576 if (imp < TIPC_CRITICAL_IMPORTANCE)
578 return port_build_proto_msg(port_peerport(p_ptr),
579 port_peernode(p_ptr),
585 port_out_seqno(p_ptr),
589 void tipc_port_recv_proto_msg(struct sk_buff *buf)
591 struct tipc_msg *msg = buf_msg(buf);
592 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
594 struct sk_buff *r_buf = NULL;
595 struct sk_buff *abort_buf = NULL;
597 msg_dbg(msg, "PORT<RECV<:");
600 err = TIPC_ERR_NO_PORT;
601 } else if (p_ptr->publ.connected) {
602 if (port_peernode(p_ptr) != msg_orignode(msg))
603 err = TIPC_ERR_NO_PORT;
604 if (port_peerport(p_ptr) != msg_origport(msg))
605 err = TIPC_ERR_NO_PORT;
606 if (!err && msg_routed(msg)) {
607 u32 seqno = msg_transp_seqno(msg);
608 u32 myno = ++p_ptr->last_in_seqno;
610 err = TIPC_ERR_NO_PORT;
611 abort_buf = port_build_self_abort_msg(p_ptr, err);
614 if (msg_type(msg) == CONN_ACK) {
615 int wakeup = tipc_port_congested(p_ptr) &&
616 p_ptr->publ.congested &&
618 p_ptr->acked += msg_msgcnt(msg);
619 if (tipc_port_congested(p_ptr))
621 p_ptr->publ.congested = 0;
624 p_ptr->wakeup(&p_ptr->publ);
627 } else if (p_ptr->publ.published) {
628 err = TIPC_ERR_NO_PORT;
631 r_buf = port_build_proto_msg(msg_origport(msg),
644 if (msg_type(msg) == CONN_PROBE) {
645 r_buf = port_build_proto_msg(msg_origport(msg),
652 port_out_seqno(p_ptr),
655 p_ptr->probing_state = CONFIRMED;
656 port_incr_out_seqno(p_ptr);
659 tipc_port_unlock(p_ptr);
660 tipc_net_route_msg(r_buf);
661 tipc_net_route_msg(abort_buf);
665 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
667 struct publication *publ;
670 tipc_printf(buf, "<%u.%u.%u:%u>:",
671 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
672 tipc_node(tipc_own_addr), p_ptr->publ.ref);
674 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
676 if (p_ptr->publ.connected) {
677 u32 dport = port_peerport(p_ptr);
678 u32 destnode = port_peernode(p_ptr);
680 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
681 tipc_zone(destnode), tipc_cluster(destnode),
682 tipc_node(destnode), dport);
683 if (p_ptr->publ.conn_type != 0)
684 tipc_printf(buf, " via {%u,%u}",
685 p_ptr->publ.conn_type,
686 p_ptr->publ.conn_instance);
688 else if (p_ptr->publ.published) {
689 tipc_printf(buf, " bound to");
690 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
691 if (publ->lower == publ->upper)
692 tipc_printf(buf, " {%u,%u}", publ->type,
695 tipc_printf(buf, " {%u,%u,%u}", publ->type,
696 publ->lower, publ->upper);
699 tipc_printf(buf, "\n");
702 #define MAX_PORT_QUERY 32768
704 struct sk_buff *tipc_port_get_ports(void)
707 struct tlv_desc *rep_tlv;
712 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
715 rep_tlv = (struct tlv_desc *)buf->data;
717 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
718 spin_lock_bh(&tipc_port_list_lock);
719 list_for_each_entry(p_ptr, &ports, port_list) {
720 spin_lock_bh(p_ptr->publ.lock);
721 port_print(p_ptr, &pb, 0);
722 spin_unlock_bh(p_ptr->publ.lock);
724 spin_unlock_bh(&tipc_port_list_lock);
725 str_len = tipc_printbuf_validate(&pb);
727 skb_put(buf, TLV_SPACE(str_len));
728 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
735 #define MAX_PORT_STATS 2000
737 struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space)
742 struct tlv_desc *rep_tlv;
746 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_PORT_REF))
747 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
749 ref = *(u32 *)TLV_DATA(req_tlv_area);
752 p_ptr = tipc_port_lock(ref);
754 return cfg_reply_error_string("port not found");
756 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_STATS));
758 tipc_port_unlock(p_ptr);
761 rep_tlv = (struct tlv_desc *)buf->data;
763 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_STATS);
764 port_print(p_ptr, &pb, 1);
765 /* NEED TO FILL IN ADDITIONAL PORT STATISTICS HERE */
766 tipc_port_unlock(p_ptr);
767 str_len = tipc_printbuf_validate(&pb);
769 skb_put(buf, TLV_SPACE(str_len));
770 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
777 void tipc_port_reinit(void)
780 struct tipc_msg *msg;
782 spin_lock_bh(&tipc_port_list_lock);
783 list_for_each_entry(p_ptr, &ports, port_list) {
784 msg = &p_ptr->publ.phdr;
785 if (msg_orignode(msg) == tipc_own_addr)
787 msg_set_orignode(msg, tipc_own_addr);
789 spin_unlock_bh(&tipc_port_list_lock);
794 * port_dispatcher_sigh(): Signal handler for messages destinated
795 * to the tipc_port interface.
798 static void port_dispatcher_sigh(void *dummy)
802 spin_lock_bh(&queue_lock);
803 buf = msg_queue_head;
804 msg_queue_head = NULL;
805 spin_unlock_bh(&queue_lock);
809 struct user_port *up_ptr;
810 struct tipc_portid orig;
811 struct tipc_name_seq dseq;
817 struct sk_buff *next = buf->next;
818 struct tipc_msg *msg = buf_msg(buf);
819 u32 dref = msg_destport(msg);
821 message_type = msg_type(msg);
822 if (message_type > TIPC_DIRECT_MSG)
823 goto reject; /* Unsupported message type */
825 p_ptr = tipc_port_lock(dref);
827 goto reject; /* Port deleted while msg in queue */
829 orig.ref = msg_origport(msg);
830 orig.node = msg_orignode(msg);
831 up_ptr = p_ptr->user_port;
832 usr_handle = up_ptr->usr_handle;
833 connected = p_ptr->publ.connected;
834 published = p_ptr->publ.published;
836 if (unlikely(msg_errcode(msg)))
839 switch (message_type) {
842 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
843 u32 peer_port = port_peerport(p_ptr);
844 u32 peer_node = port_peernode(p_ptr);
846 spin_unlock_bh(p_ptr->publ.lock);
847 if (unlikely(!connected)) {
848 if (unlikely(published))
850 tipc_connect2port(dref,&orig);
852 if (unlikely(msg_origport(msg) != peer_port))
854 if (unlikely(msg_orignode(msg) != peer_node))
858 if (unlikely(++p_ptr->publ.conn_unacked >=
859 TIPC_FLOW_CONTROL_WIN))
860 tipc_acknowledge(dref,
861 p_ptr->publ.conn_unacked);
862 skb_pull(buf, msg_hdr_sz(msg));
863 cb(usr_handle, dref, &buf, msg_data(msg),
867 case TIPC_DIRECT_MSG:{
868 tipc_msg_event cb = up_ptr->msg_cb;
870 spin_unlock_bh(p_ptr->publ.lock);
871 if (unlikely(connected))
875 skb_pull(buf, msg_hdr_sz(msg));
876 cb(usr_handle, dref, &buf, msg_data(msg),
877 msg_data_sz(msg), msg_importance(msg),
882 case TIPC_NAMED_MSG:{
883 tipc_named_msg_event cb = up_ptr->named_msg_cb;
885 spin_unlock_bh(p_ptr->publ.lock);
886 if (unlikely(connected))
890 if (unlikely(!published))
892 dseq.type = msg_nametype(msg);
893 dseq.lower = msg_nameinst(msg);
894 dseq.upper = (message_type == TIPC_NAMED_MSG)
895 ? dseq.lower : msg_nameupper(msg);
896 skb_pull(buf, msg_hdr_sz(msg));
897 cb(usr_handle, dref, &buf, msg_data(msg),
898 msg_data_sz(msg), msg_importance(msg),
908 switch (message_type) {
911 tipc_conn_shutdown_event cb =
913 u32 peer_port = port_peerport(p_ptr);
914 u32 peer_node = port_peernode(p_ptr);
916 spin_unlock_bh(p_ptr->publ.lock);
917 if (!connected || !cb)
919 if (msg_origport(msg) != peer_port)
921 if (msg_orignode(msg) != peer_node)
923 tipc_disconnect(dref);
924 skb_pull(buf, msg_hdr_sz(msg));
925 cb(usr_handle, dref, &buf, msg_data(msg),
926 msg_data_sz(msg), msg_errcode(msg));
929 case TIPC_DIRECT_MSG:{
930 tipc_msg_err_event cb = up_ptr->err_cb;
932 spin_unlock_bh(p_ptr->publ.lock);
933 if (connected || !cb)
935 skb_pull(buf, msg_hdr_sz(msg));
936 cb(usr_handle, dref, &buf, msg_data(msg),
937 msg_data_sz(msg), msg_errcode(msg), &orig);
941 case TIPC_NAMED_MSG:{
942 tipc_named_msg_err_event cb =
943 up_ptr->named_err_cb;
945 spin_unlock_bh(p_ptr->publ.lock);
946 if (connected || !cb)
948 dseq.type = msg_nametype(msg);
949 dseq.lower = msg_nameinst(msg);
950 dseq.upper = (message_type == TIPC_NAMED_MSG)
951 ? dseq.lower : msg_nameupper(msg);
952 skb_pull(buf, msg_hdr_sz(msg));
953 cb(usr_handle, dref, &buf, msg_data(msg),
954 msg_data_sz(msg), msg_errcode(msg), &dseq);
963 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
969 * port_dispatcher(): Dispatcher for messages destinated
970 * to the tipc_port interface. Called with port locked.
973 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
976 spin_lock_bh(&queue_lock);
977 if (msg_queue_head) {
978 msg_queue_tail->next = buf;
979 msg_queue_tail = buf;
981 msg_queue_tail = msg_queue_head = buf;
982 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
984 spin_unlock_bh(&queue_lock);
989 * Wake up port after congestion: Called with port locked,
993 static void port_wakeup_sh(unsigned long ref)
996 struct user_port *up_ptr;
997 tipc_continue_event cb = NULL;
1000 p_ptr = tipc_port_lock(ref);
1002 up_ptr = p_ptr->user_port;
1004 cb = up_ptr->continue_event_cb;
1005 uh = up_ptr->usr_handle;
1007 tipc_port_unlock(p_ptr);
1014 static void port_wakeup(struct tipc_port *p_ptr)
1016 tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
1019 void tipc_acknowledge(u32 ref, u32 ack)
1022 struct sk_buff *buf = NULL;
1024 p_ptr = tipc_port_lock(ref);
1027 if (p_ptr->publ.connected) {
1028 p_ptr->publ.conn_unacked -= ack;
1029 buf = port_build_proto_msg(port_peerport(p_ptr),
1030 port_peernode(p_ptr),
1036 port_out_seqno(p_ptr),
1039 tipc_port_unlock(p_ptr);
1040 tipc_net_route_msg(buf);
1044 * tipc_createport(): user level call. Will add port to
1045 * registry if non-zero user_ref.
1048 int tipc_createport(u32 user_ref,
1050 unsigned int importance,
1051 tipc_msg_err_event error_cb,
1052 tipc_named_msg_err_event named_error_cb,
1053 tipc_conn_shutdown_event conn_error_cb,
1054 tipc_msg_event msg_cb,
1055 tipc_named_msg_event named_msg_cb,
1056 tipc_conn_msg_event conn_msg_cb,
1057 tipc_continue_event continue_event_cb,/* May be zero */
1060 struct user_port *up_ptr;
1064 up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
1066 warn("Port creation failed, no memory\n");
1069 ref = tipc_createport_raw(NULL, port_dispatcher, port_wakeup, importance);
1070 p_ptr = tipc_port_lock(ref);
1076 p_ptr->user_port = up_ptr;
1077 up_ptr->user_ref = user_ref;
1078 up_ptr->usr_handle = usr_handle;
1079 up_ptr->ref = p_ptr->publ.ref;
1080 up_ptr->err_cb = error_cb;
1081 up_ptr->named_err_cb = named_error_cb;
1082 up_ptr->conn_err_cb = conn_error_cb;
1083 up_ptr->msg_cb = msg_cb;
1084 up_ptr->named_msg_cb = named_msg_cb;
1085 up_ptr->conn_msg_cb = conn_msg_cb;
1086 up_ptr->continue_event_cb = continue_event_cb;
1087 INIT_LIST_HEAD(&up_ptr->uport_list);
1088 tipc_reg_add_port(up_ptr);
1089 *portref = p_ptr->publ.ref;
1090 dbg(" tipc_createport: %x with ref %u\n", p_ptr, p_ptr->publ.ref);
1091 tipc_port_unlock(p_ptr);
1095 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
1098 id->node = tipc_own_addr;
1102 int tipc_portimportance(u32 ref, unsigned int *importance)
1106 p_ptr = tipc_port_lock(ref);
1109 *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1110 spin_unlock_bh(p_ptr->publ.lock);
1114 int tipc_set_portimportance(u32 ref, unsigned int imp)
1118 if (imp > TIPC_CRITICAL_IMPORTANCE)
1121 p_ptr = tipc_port_lock(ref);
1124 msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1125 spin_unlock_bh(p_ptr->publ.lock);
1130 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1133 struct publication *publ;
1137 p_ptr = tipc_port_lock(ref);
1141 dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1142 "lower = %u, upper = %u\n",
1143 ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1144 if (p_ptr->publ.connected)
1146 if (seq->lower > seq->upper)
1148 if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1150 key = ref + p_ptr->pub_count + 1;
1155 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1156 scope, p_ptr->publ.ref, key);
1158 list_add(&publ->pport_list, &p_ptr->publications);
1160 p_ptr->publ.published = 1;
1164 tipc_port_unlock(p_ptr);
1168 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1171 struct publication *publ;
1172 struct publication *tpubl;
1175 p_ptr = tipc_port_lock(ref);
1179 list_for_each_entry_safe(publ, tpubl,
1180 &p_ptr->publications, pport_list) {
1181 tipc_nametbl_withdraw(publ->type, publ->lower,
1182 publ->ref, publ->key);
1186 list_for_each_entry_safe(publ, tpubl,
1187 &p_ptr->publications, pport_list) {
1188 if (publ->scope != scope)
1190 if (publ->type != seq->type)
1192 if (publ->lower != seq->lower)
1194 if (publ->upper != seq->upper)
1196 tipc_nametbl_withdraw(publ->type, publ->lower,
1197 publ->ref, publ->key);
1202 if (list_empty(&p_ptr->publications))
1203 p_ptr->publ.published = 0;
1204 tipc_port_unlock(p_ptr);
1208 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1211 struct tipc_msg *msg;
1214 p_ptr = tipc_port_lock(ref);
1217 if (p_ptr->publ.published || p_ptr->publ.connected)
1222 msg = &p_ptr->publ.phdr;
1223 msg_set_destnode(msg, peer->node);
1224 msg_set_destport(msg, peer->ref);
1225 msg_set_orignode(msg, tipc_own_addr);
1226 msg_set_origport(msg, p_ptr->publ.ref);
1227 msg_set_transp_seqno(msg, 42);
1228 msg_set_type(msg, TIPC_CONN_MSG);
1229 if (!may_route(peer->node))
1230 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1232 msg_set_hdr_sz(msg, LONG_H_SIZE);
1234 p_ptr->probing_interval = PROBING_INTERVAL;
1235 p_ptr->probing_state = CONFIRMED;
1236 p_ptr->publ.connected = 1;
1237 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1239 tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1240 (void *)(unsigned long)ref,
1241 (net_ev_handler)port_handle_node_down);
1244 tipc_port_unlock(p_ptr);
1245 p_ptr->publ.max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1250 * tipc_disconnect(): Disconnect port form peer.
1251 * This is a node local operation.
1254 int tipc_disconnect(u32 ref)
1257 int res = -ENOTCONN;
1259 p_ptr = tipc_port_lock(ref);
1262 if (p_ptr->publ.connected) {
1263 p_ptr->publ.connected = 0;
1264 /* let timer expire on it's own to avoid deadlock! */
1265 tipc_nodesub_unsubscribe(&p_ptr->subscription);
1268 tipc_port_unlock(p_ptr);
1273 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1275 int tipc_shutdown(u32 ref)
1278 struct sk_buff *buf = NULL;
1280 p_ptr = tipc_port_lock(ref);
1284 if (p_ptr->publ.connected) {
1285 u32 imp = msg_importance(&p_ptr->publ.phdr);
1286 if (imp < TIPC_CRITICAL_IMPORTANCE)
1288 buf = port_build_proto_msg(port_peerport(p_ptr),
1289 port_peernode(p_ptr),
1295 port_out_seqno(p_ptr),
1298 tipc_port_unlock(p_ptr);
1299 tipc_net_route_msg(buf);
1300 return tipc_disconnect(ref);
1303 int tipc_isconnected(u32 ref, int *isconnected)
1307 p_ptr = tipc_port_lock(ref);
1310 *isconnected = p_ptr->publ.connected;
1311 tipc_port_unlock(p_ptr);
1315 int tipc_peer(u32 ref, struct tipc_portid *peer)
1320 p_ptr = tipc_port_lock(ref);
1323 if (p_ptr->publ.connected) {
1324 peer->ref = port_peerport(p_ptr);
1325 peer->node = port_peernode(p_ptr);
1329 tipc_port_unlock(p_ptr);
1333 int tipc_ref_valid(u32 ref)
1335 /* Works irrespective of type */
1336 return !!tipc_ref_deref(ref);
1341 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1342 * message for this node.
1345 int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1346 struct iovec const *msg_sect)
1348 struct sk_buff *buf;
1351 res = msg_build(&sender->publ.phdr, msg_sect, num_sect,
1352 MAX_MSG_SIZE, !sender->user_port, &buf);
1354 tipc_port_recv_msg(buf);
1359 * tipc_send - send message sections on connection
1362 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1368 p_ptr = tipc_port_deref(ref);
1369 if (!p_ptr || !p_ptr->publ.connected)
1372 p_ptr->publ.congested = 1;
1373 if (!tipc_port_congested(p_ptr)) {
1374 destnode = port_peernode(p_ptr);
1375 if (likely(destnode != tipc_own_addr))
1376 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1379 res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1381 if (likely(res != -ELINKCONG)) {
1382 port_incr_out_seqno(p_ptr);
1383 p_ptr->publ.congested = 0;
1388 if (port_unreliable(p_ptr)) {
1389 p_ptr->publ.congested = 0;
1390 /* Just calculate msg length and return */
1391 return msg_calc_data_size(msg_sect, num_sect);
1397 * tipc_send_buf - send message buffer on connection
1400 int tipc_send_buf(u32 ref, struct sk_buff *buf, unsigned int dsz)
1403 struct tipc_msg *msg;
1409 p_ptr = tipc_port_deref(ref);
1410 if (!p_ptr || !p_ptr->publ.connected)
1413 msg = &p_ptr->publ.phdr;
1414 hsz = msg_hdr_sz(msg);
1416 msg_set_size(msg, sz);
1417 if (skb_cow(buf, hsz))
1421 skb_copy_to_linear_data(buf, msg, hsz);
1422 destnode = msg_destnode(msg);
1423 p_ptr->publ.congested = 1;
1424 if (!tipc_port_congested(p_ptr)) {
1425 if (likely(destnode != tipc_own_addr))
1426 res = tipc_send_buf_fast(buf, destnode);
1428 tipc_port_recv_msg(buf);
1431 if (likely(res != -ELINKCONG)) {
1432 port_incr_out_seqno(p_ptr);
1434 p_ptr->publ.congested = 0;
1438 if (port_unreliable(p_ptr)) {
1439 p_ptr->publ.congested = 0;
1446 * tipc_forward2name - forward message sections to port name
1449 int tipc_forward2name(u32 ref,
1450 struct tipc_name const *name,
1453 struct iovec const *msg_sect,
1454 struct tipc_portid const *orig,
1455 unsigned int importance)
1458 struct tipc_msg *msg;
1459 u32 destnode = domain;
1463 p_ptr = tipc_port_deref(ref);
1464 if (!p_ptr || p_ptr->publ.connected)
1467 msg = &p_ptr->publ.phdr;
1468 msg_set_type(msg, TIPC_NAMED_MSG);
1469 msg_set_orignode(msg, orig->node);
1470 msg_set_origport(msg, orig->ref);
1471 msg_set_hdr_sz(msg, LONG_H_SIZE);
1472 msg_set_nametype(msg, name->type);
1473 msg_set_nameinst(msg, name->instance);
1474 msg_set_lookup_scope(msg, addr_scope(domain));
1475 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1476 msg_set_importance(msg,importance);
1477 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1478 msg_set_destnode(msg, destnode);
1479 msg_set_destport(msg, destport);
1481 if (likely(destport || destnode)) {
1483 if (likely(destnode == tipc_own_addr))
1484 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1485 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1487 if (likely(res != -ELINKCONG))
1489 if (port_unreliable(p_ptr)) {
1490 /* Just calculate msg length and return */
1491 return msg_calc_data_size(msg_sect, num_sect);
1495 return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1500 * tipc_send2name - send message sections to port name
1503 int tipc_send2name(u32 ref,
1504 struct tipc_name const *name,
1505 unsigned int domain,
1506 unsigned int num_sect,
1507 struct iovec const *msg_sect)
1509 struct tipc_portid orig;
1512 orig.node = tipc_own_addr;
1513 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1514 TIPC_PORT_IMPORTANCE);
1518 * tipc_forward_buf2name - forward message buffer to port name
1521 int tipc_forward_buf2name(u32 ref,
1522 struct tipc_name const *name,
1524 struct sk_buff *buf,
1526 struct tipc_portid const *orig,
1527 unsigned int importance)
1530 struct tipc_msg *msg;
1531 u32 destnode = domain;
1535 p_ptr = (struct port *)tipc_ref_deref(ref);
1536 if (!p_ptr || p_ptr->publ.connected)
1539 msg = &p_ptr->publ.phdr;
1540 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1541 msg_set_importance(msg, importance);
1542 msg_set_type(msg, TIPC_NAMED_MSG);
1543 msg_set_orignode(msg, orig->node);
1544 msg_set_origport(msg, orig->ref);
1545 msg_set_nametype(msg, name->type);
1546 msg_set_nameinst(msg, name->instance);
1547 msg_set_lookup_scope(msg, addr_scope(domain));
1548 msg_set_hdr_sz(msg, LONG_H_SIZE);
1549 msg_set_size(msg, LONG_H_SIZE + dsz);
1550 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1551 msg_set_destnode(msg, destnode);
1552 msg_set_destport(msg, destport);
1553 msg_dbg(msg, "forw2name ==> ");
1554 if (skb_cow(buf, LONG_H_SIZE))
1556 skb_push(buf, LONG_H_SIZE);
1557 skb_copy_to_linear_data(buf, msg, LONG_H_SIZE);
1558 msg_dbg(buf_msg(buf),"PREP:");
1559 if (likely(destport || destnode)) {
1561 if (destnode == tipc_own_addr)
1562 return tipc_port_recv_msg(buf);
1563 res = tipc_send_buf_fast(buf, destnode);
1564 if (likely(res != -ELINKCONG))
1566 if (port_unreliable(p_ptr))
1570 return tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
1574 * tipc_send_buf2name - send message buffer to port name
1577 int tipc_send_buf2name(u32 ref,
1578 struct tipc_name const *dest,
1580 struct sk_buff *buf,
1583 struct tipc_portid orig;
1586 orig.node = tipc_own_addr;
1587 return tipc_forward_buf2name(ref, dest, domain, buf, dsz, &orig,
1588 TIPC_PORT_IMPORTANCE);
1592 * tipc_forward2port - forward message sections to port identity
1595 int tipc_forward2port(u32 ref,
1596 struct tipc_portid const *dest,
1597 unsigned int num_sect,
1598 struct iovec const *msg_sect,
1599 struct tipc_portid const *orig,
1600 unsigned int importance)
1603 struct tipc_msg *msg;
1606 p_ptr = tipc_port_deref(ref);
1607 if (!p_ptr || p_ptr->publ.connected)
1610 msg = &p_ptr->publ.phdr;
1611 msg_set_type(msg, TIPC_DIRECT_MSG);
1612 msg_set_orignode(msg, orig->node);
1613 msg_set_origport(msg, orig->ref);
1614 msg_set_destnode(msg, dest->node);
1615 msg_set_destport(msg, dest->ref);
1616 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1617 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1618 msg_set_importance(msg, importance);
1620 if (dest->node == tipc_own_addr)
1621 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1622 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1623 if (likely(res != -ELINKCONG))
1625 if (port_unreliable(p_ptr)) {
1626 /* Just calculate msg length and return */
1627 return msg_calc_data_size(msg_sect, num_sect);
1633 * tipc_send2port - send message sections to port identity
1636 int tipc_send2port(u32 ref,
1637 struct tipc_portid const *dest,
1638 unsigned int num_sect,
1639 struct iovec const *msg_sect)
1641 struct tipc_portid orig;
1644 orig.node = tipc_own_addr;
1645 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1646 TIPC_PORT_IMPORTANCE);
1650 * tipc_forward_buf2port - forward message buffer to port identity
1652 int tipc_forward_buf2port(u32 ref,
1653 struct tipc_portid const *dest,
1654 struct sk_buff *buf,
1656 struct tipc_portid const *orig,
1657 unsigned int importance)
1660 struct tipc_msg *msg;
1663 p_ptr = (struct port *)tipc_ref_deref(ref);
1664 if (!p_ptr || p_ptr->publ.connected)
1667 msg = &p_ptr->publ.phdr;
1668 msg_set_type(msg, TIPC_DIRECT_MSG);
1669 msg_set_orignode(msg, orig->node);
1670 msg_set_origport(msg, orig->ref);
1671 msg_set_destnode(msg, dest->node);
1672 msg_set_destport(msg, dest->ref);
1673 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1674 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1675 msg_set_importance(msg, importance);
1676 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1677 if (skb_cow(buf, DIR_MSG_H_SIZE))
1680 skb_push(buf, DIR_MSG_H_SIZE);
1681 skb_copy_to_linear_data(buf, msg, DIR_MSG_H_SIZE);
1682 msg_dbg(msg, "buf2port: ");
1684 if (dest->node == tipc_own_addr)
1685 return tipc_port_recv_msg(buf);
1686 res = tipc_send_buf_fast(buf, dest->node);
1687 if (likely(res != -ELINKCONG))
1689 if (port_unreliable(p_ptr))
1695 * tipc_send_buf2port - send message buffer to port identity
1698 int tipc_send_buf2port(u32 ref,
1699 struct tipc_portid const *dest,
1700 struct sk_buff *buf,
1703 struct tipc_portid orig;
1706 orig.node = tipc_own_addr;
1707 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1708 TIPC_PORT_IMPORTANCE);