net/tipc/port.c

   1 /*
   2  * net/tipc/port.c: TIPC port code
   3  *
   4  * Copyright (c) 1992-2007, Ericsson AB
   5  * Copyright (c) 2004-2008, Wind River Systems
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  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.
  19  *
  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.
  23  *
  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.
  35  */
  36
  37 #include "core.h"
  38 #include "config.h"
  39 #include "port.h"
  40 #include "name_table.h"
  41 #include "user_reg.h"
  42
  43 /* Connection management: */
  44 #define PROBING_INTERVAL 3600000        /* [ms] => 1 h */
  45 #define CONFIRMED 0
  46 #define PROBING 1
  47
  48 #define MAX_REJECT_SIZE 1024
  49
  50 static struct sk_buff *msg_queue_head = NULL;
  51 static struct sk_buff *msg_queue_tail = NULL;
  52
  53 DEFINE_SPINLOCK(tipc_port_list_lock);
  54 static DEFINE_SPINLOCK(queue_lock);
  55
  56 static LIST_HEAD(ports);
  57 static void port_handle_node_down(unsigned long ref);
  58 static struct sk_buff* port_build_self_abort_msg(struct port *,u32 err);
  59 static struct sk_buff* port_build_peer_abort_msg(struct port *,u32 err);
  60 static void port_timeout(unsigned long ref);
  61
  62
  63 static u32 port_peernode(struct port *p_ptr)
  64 {
  65         return msg_destnode(&p_ptr->publ.phdr);
  66 }
  67
  68 static u32 port_peerport(struct port *p_ptr)
  69 {
  70         return msg_destport(&p_ptr->publ.phdr);
  71 }
  72
  73 static u32 port_out_seqno(struct port *p_ptr)
  74 {
  75         return msg_transp_seqno(&p_ptr->publ.phdr);
  76 }
  77
  78 static void port_incr_out_seqno(struct port *p_ptr)
  79 {
  80         struct tipc_msg *m = &p_ptr->publ.phdr;
  81
  82         if (likely(!msg_routed(m)))
  83                 return;
  84         msg_set_transp_seqno(m, (msg_transp_seqno(m) + 1));
  85 }
  86
  87 /**
  88  * tipc_multicast - send a multicast message to local and remote destinations
  89  */
  90
  91 int tipc_multicast(u32 ref, struct tipc_name_seq const *seq,
  92                    u32 num_sect, struct iovec const *msg_sect)
  93 {
  94         struct tipc_msg *hdr;
  95         struct sk_buff *buf;
  96         struct sk_buff *ibuf = NULL;
  97         struct port_list dports = {0, NULL, };
  98         struct port *oport = tipc_port_deref(ref);
  99         int ext_targets;
 100         int res;
 101
 102         if (unlikely(!oport))
 103                 return -EINVAL;
 104
 105         /* Create multicast message */
 106
 107         hdr = &oport->publ.phdr;
 108         msg_set_type(hdr, TIPC_MCAST_MSG);
 109         msg_set_nametype(hdr, seq->type);
 110         msg_set_namelower(hdr, seq->lower);
 111         msg_set_nameupper(hdr, seq->upper);
 112         msg_set_hdr_sz(hdr, MCAST_H_SIZE);
 113         res = tipc_msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
 114                         !oport->user_port, &buf);
 115         if (unlikely(!buf))
 116                 return res;
 117
 118         /* Figure out where to send multicast message */
 119
 120         ext_targets = tipc_nametbl_mc_translate(seq->type, seq->lower, seq->upper,
 121                                                 TIPC_NODE_SCOPE, &dports);
 122
 123         /* Send message to destinations (duplicate it only if necessary) */
 124
 125         if (ext_targets) {
 126                 if (dports.count != 0) {
 127                         ibuf = skb_copy(buf, GFP_ATOMIC);
 128                         if (ibuf == NULL) {
 129                                 tipc_port_list_free(&dports);
 130                                 buf_discard(buf);
 131                                 return -ENOMEM;
 132                         }
 133                 }
 134                 res = tipc_bclink_send_msg(buf);
 135                 if ((res < 0) && (dports.count != 0)) {
 136                         buf_discard(ibuf);
 137                 }
 138         } else {
 139                 ibuf = buf;
 140         }
 141
 142         if (res >= 0) {
 143                 if (ibuf)
 144                         tipc_port_recv_mcast(ibuf, &dports);
 145         } else {
 146                 tipc_port_list_free(&dports);
 147         }
 148         return res;
 149 }
 150
 151 /**
 152  * tipc_port_recv_mcast - deliver multicast message to all destination ports
 153  *
 154  * If there is no port list, perform a lookup to create one
 155  */
 156
 157 void tipc_port_recv_mcast(struct sk_buff *buf, struct port_list *dp)
 158 {
 159         struct tipc_msg* msg;
 160         struct port_list dports = {0, NULL, };
 161         struct port_list *item = dp;
 162         int cnt = 0;
 163
 164         msg = buf_msg(buf);
 165
 166         /* Create destination port list, if one wasn't supplied */
 167
 168         if (dp == NULL) {
 169                 tipc_nametbl_mc_translate(msg_nametype(msg),
 170                                      msg_namelower(msg),
 171                                      msg_nameupper(msg),
 172                                      TIPC_CLUSTER_SCOPE,
 173                                      &dports);
 174                 item = dp = &dports;
 175         }
 176
 177         /* Deliver a copy of message to each destination port */
 178
 179         if (dp->count != 0) {
 180                 if (dp->count == 1) {
 181                         msg_set_destport(msg, dp->ports[0]);
 182                         tipc_port_recv_msg(buf);
 183                         tipc_port_list_free(dp);
 184                         return;
 185                 }
 186                 for (; cnt < dp->count; cnt++) {
 187                         int index = cnt % PLSIZE;
 188                         struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
 189
 190                         if (b == NULL) {
 191                                 warn("Unable to deliver multicast message(s)\n");
 192                                 msg_dbg(msg, "LOST:");
 193                                 goto exit;
 194                         }
 195                         if ((index == 0) && (cnt != 0)) {
 196                                 item = item->next;
 197                         }
 198                         msg_set_destport(buf_msg(b),item->ports[index]);
 199                         tipc_port_recv_msg(b);
 200                 }
 201         }
 202 exit:
 203         buf_discard(buf);
 204         tipc_port_list_free(dp);
 205 }
 206
 207 /**
 208  * tipc_createport_raw - create a generic TIPC port
 209  *
 210  * Returns pointer to (locked) TIPC port, or NULL if unable to create it
 211  */
 212
 213 struct tipc_port *tipc_createport_raw(void *usr_handle,
 214                         u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
 215                         void (*wakeup)(struct tipc_port *),
 216                         const u32 importance)
 217 {
 218         struct port *p_ptr;
 219         struct tipc_msg *msg;
 220         u32 ref;
 221
 222         p_ptr = kzalloc(sizeof(*p_ptr), GFP_ATOMIC);
 223         if (!p_ptr) {
 224                 warn("Port creation failed, no memory\n");
 225                 return NULL;
 226         }
 227         ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
 228         if (!ref) {
 229                 warn("Port creation failed, reference table exhausted\n");
 230                 kfree(p_ptr);
 231                 return NULL;
 232         }
 233
 234         p_ptr->publ.usr_handle = usr_handle;
 235         p_ptr->publ.max_pkt = MAX_PKT_DEFAULT;
 236         p_ptr->publ.ref = ref;
 237         msg = &p_ptr->publ.phdr;
 238         tipc_msg_init(msg, importance, TIPC_NAMED_MSG, LONG_H_SIZE, 0);
 239         msg_set_origport(msg, ref);
 240         p_ptr->last_in_seqno = 41;
 241         p_ptr->sent = 1;
 242         INIT_LIST_HEAD(&p_ptr->wait_list);
 243         INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
 244         p_ptr->dispatcher = dispatcher;
 245         p_ptr->wakeup = wakeup;
 246         p_ptr->user_port = NULL;
 247         k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
 248         spin_lock_bh(&tipc_port_list_lock);
 249         INIT_LIST_HEAD(&p_ptr->publications);
 250         INIT_LIST_HEAD(&p_ptr->port_list);
 251         list_add_tail(&p_ptr->port_list, &ports);
 252         spin_unlock_bh(&tipc_port_list_lock);
 253         return &(p_ptr->publ);
 254 }
 255
 256 int tipc_deleteport(u32 ref)
 257 {
 258         struct port *p_ptr;
 259         struct sk_buff *buf = NULL;
 260
 261         tipc_withdraw(ref, 0, NULL);
 262         p_ptr = tipc_port_lock(ref);
 263         if (!p_ptr)
 264                 return -EINVAL;
 265
 266         tipc_ref_discard(ref);
 267         tipc_port_unlock(p_ptr);
 268
 269         k_cancel_timer(&p_ptr->timer);
 270         if (p_ptr->publ.connected) {
 271                 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
 272                 tipc_nodesub_unsubscribe(&p_ptr->subscription);
 273         }
 274         if (p_ptr->user_port) {
 275                 tipc_reg_remove_port(p_ptr->user_port);
 276                 kfree(p_ptr->user_port);
 277         }
 278
 279         spin_lock_bh(&tipc_port_list_lock);
 280         list_del(&p_ptr->port_list);
 281         list_del(&p_ptr->wait_list);
 282         spin_unlock_bh(&tipc_port_list_lock);
 283         k_term_timer(&p_ptr->timer);
 284         kfree(p_ptr);
 285         dbg("Deleted port %u\n", ref);
 286         tipc_net_route_msg(buf);
 287         return 0;
 288 }
 289
 290 static int port_unreliable(struct port *p_ptr)
 291 {
 292         return msg_src_droppable(&p_ptr->publ.phdr);
 293 }
 294
 295 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
 296 {
 297         struct port *p_ptr;
 298
 299         p_ptr = tipc_port_lock(ref);
 300         if (!p_ptr)
 301                 return -EINVAL;
 302         *isunreliable = port_unreliable(p_ptr);
 303         tipc_port_unlock(p_ptr);
 304         return 0;
 305 }
 306
 307 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
 308 {
 309         struct port *p_ptr;
 310
 311         p_ptr = tipc_port_lock(ref);
 312         if (!p_ptr)
 313                 return -EINVAL;
 314         msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
 315         tipc_port_unlock(p_ptr);
 316         return 0;
 317 }
 318
 319 static int port_unreturnable(struct port *p_ptr)
 320 {
 321         return msg_dest_droppable(&p_ptr->publ.phdr);
 322 }
 323
 324 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
 325 {
 326         struct port *p_ptr;
 327
 328         p_ptr = tipc_port_lock(ref);
 329         if (!p_ptr)
 330                 return -EINVAL;
 331         *isunrejectable = port_unreturnable(p_ptr);
 332         tipc_port_unlock(p_ptr);
 333         return 0;
 334 }
 335
 336 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
 337 {
 338         struct port *p_ptr;
 339
 340         p_ptr = tipc_port_lock(ref);
 341         if (!p_ptr)
 342                 return -EINVAL;
 343         msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
 344         tipc_port_unlock(p_ptr);
 345         return 0;
 346 }
 347
 348 /*
 349  * port_build_proto_msg(): build a port level protocol
 350  * or a connection abortion message. Called with
 351  * tipc_port lock on.
 352  */
 353 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
 354                                             u32 origport, u32 orignode,
 355                                             u32 usr, u32 type, u32 err,
 356                                             u32 seqno, u32 ack)
 357 {
 358         struct sk_buff *buf;
 359         struct tipc_msg *msg;
 360
 361         buf = tipc_buf_acquire(LONG_H_SIZE);
 362         if (buf) {
 363                 msg = buf_msg(buf);
 364                 tipc_msg_init(msg, usr, type, LONG_H_SIZE, destnode);
 365                 msg_set_errcode(msg, err);
 366                 msg_set_destport(msg, destport);
 367                 msg_set_origport(msg, origport);
 368                 msg_set_orignode(msg, orignode);
 369                 msg_set_transp_seqno(msg, seqno);
 370                 msg_set_msgcnt(msg, ack);
 371                 msg_dbg(msg, "PORT>SEND>:");
 372         }
 373         return buf;
 374 }
 375
 376 int tipc_reject_msg(struct sk_buff *buf, u32 err)
 377 {
 378         struct tipc_msg *msg = buf_msg(buf);
 379         struct sk_buff *rbuf;
 380         struct tipc_msg *rmsg;
 381         int hdr_sz;
 382         u32 imp = msg_importance(msg);
 383         u32 data_sz = msg_data_sz(msg);
 384
 385         if (data_sz > MAX_REJECT_SIZE)
 386                 data_sz = MAX_REJECT_SIZE;
 387         if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
 388                 imp++;
 389         msg_dbg(msg, "port->rej: ");
 390
 391         /* discard rejected message if it shouldn't be returned to sender */
 392         if (msg_errcode(msg) || msg_dest_droppable(msg)) {
 393                 buf_discard(buf);
 394                 return data_sz;
 395         }
 396
 397         /* construct rejected message */
 398         if (msg_mcast(msg))
 399                 hdr_sz = MCAST_H_SIZE;
 400         else
 401                 hdr_sz = LONG_H_SIZE;
 402         rbuf = tipc_buf_acquire(data_sz + hdr_sz);
 403         if (rbuf == NULL) {
 404                 buf_discard(buf);
 405                 return data_sz;
 406         }
 407         rmsg = buf_msg(rbuf);
 408         tipc_msg_init(rmsg, imp, msg_type(msg), hdr_sz, msg_orignode(msg));
 409         msg_set_errcode(rmsg, err);
 410         msg_set_destport(rmsg, msg_origport(msg));
 411         msg_set_origport(rmsg, msg_destport(msg));
 412         if (msg_short(msg)) {
 413                 msg_set_orignode(rmsg, tipc_own_addr);
 414                 /* leave name type & instance as zeroes */
 415         } else {
 416                 msg_set_orignode(rmsg, msg_destnode(msg));
 417                 msg_set_nametype(rmsg, msg_nametype(msg));
 418                 msg_set_nameinst(rmsg, msg_nameinst(msg));
 419         }
 420         msg_set_size(rmsg, data_sz + hdr_sz);
 421         skb_copy_to_linear_data_offset(rbuf, hdr_sz, msg_data(msg), data_sz);
 422
 423         /* send self-abort message when rejecting on a connected port */
 424         if (msg_connected(msg)) {
 425                 struct sk_buff *abuf = NULL;
 426                 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
 427
 428                 if (p_ptr) {
 429                         if (p_ptr->publ.connected)
 430                                 abuf = port_build_self_abort_msg(p_ptr, err);
 431                         tipc_port_unlock(p_ptr);
 432                 }
 433                 tipc_net_route_msg(abuf);
 434         }
 435
 436         /* send rejected message */
 437         buf_discard(buf);
 438         tipc_net_route_msg(rbuf);
 439         return data_sz;
 440 }
 441
 442 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
 443                               struct iovec const *msg_sect, u32 num_sect,
 444                               int err)
 445 {
 446         struct sk_buff *buf;
 447         int res;
 448
 449         res = tipc_msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
 450                         !p_ptr->user_port, &buf);
 451         if (!buf)
 452                 return res;
 453
 454         return tipc_reject_msg(buf, err);
 455 }
 456
 457 static void port_timeout(unsigned long ref)
 458 {
 459         struct port *p_ptr = tipc_port_lock(ref);
 460         struct sk_buff *buf = NULL;
 461
 462         if (!p_ptr)
 463                 return;
 464
 465         if (!p_ptr->publ.connected) {
 466                 tipc_port_unlock(p_ptr);
 467                 return;
 468         }
 469
 470         /* Last probe answered ? */
 471         if (p_ptr->probing_state == PROBING) {
 472                 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
 473         } else {
 474                 buf = port_build_proto_msg(port_peerport(p_ptr),
 475                                            port_peernode(p_ptr),
 476                                            p_ptr->publ.ref,
 477                                            tipc_own_addr,
 478                                            CONN_MANAGER,
 479                                            CONN_PROBE,
 480                                            TIPC_OK,
 481                                            port_out_seqno(p_ptr),
 482                                            0);
 483                 port_incr_out_seqno(p_ptr);
 484                 p_ptr->probing_state = PROBING;
 485                 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
 486         }
 487         tipc_port_unlock(p_ptr);
 488         tipc_net_route_msg(buf);
 489 }
 490
 491
 492 static void port_handle_node_down(unsigned long ref)
 493 {
 494         struct port *p_ptr = tipc_port_lock(ref);
 495         struct sk_buff* buf = NULL;
 496
 497         if (!p_ptr)
 498                 return;
 499         buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
 500         tipc_port_unlock(p_ptr);
 501         tipc_net_route_msg(buf);
 502 }
 503
 504
 505 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
 506 {
 507         u32 imp = msg_importance(&p_ptr->publ.phdr);
 508
 509         if (!p_ptr->publ.connected)
 510                 return NULL;
 511         if (imp < TIPC_CRITICAL_IMPORTANCE)
 512                 imp++;
 513         return port_build_proto_msg(p_ptr->publ.ref,
 514                                     tipc_own_addr,
 515                                     port_peerport(p_ptr),
 516                                     port_peernode(p_ptr),
 517                                     imp,
 518                                     TIPC_CONN_MSG,
 519                                     err,
 520                                     p_ptr->last_in_seqno + 1,
 521                                     0);
 522 }
 523
 524
 525 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
 526 {
 527         u32 imp = msg_importance(&p_ptr->publ.phdr);
 528
 529         if (!p_ptr->publ.connected)
 530                 return NULL;
 531         if (imp < TIPC_CRITICAL_IMPORTANCE)
 532                 imp++;
 533         return port_build_proto_msg(port_peerport(p_ptr),
 534                                     port_peernode(p_ptr),
 535                                     p_ptr->publ.ref,
 536                                     tipc_own_addr,
 537                                     imp,
 538                                     TIPC_CONN_MSG,
 539                                     err,
 540                                     port_out_seqno(p_ptr),
 541                                     0);
 542 }
 543
 544 void tipc_port_recv_proto_msg(struct sk_buff *buf)
 545 {
 546         struct tipc_msg *msg = buf_msg(buf);
 547         struct port *p_ptr = tipc_port_lock(msg_destport(msg));
 548         u32 err = TIPC_OK;
 549         struct sk_buff *r_buf = NULL;
 550         struct sk_buff *abort_buf = NULL;
 551
 552         msg_dbg(msg, "PORT<RECV<:");
 553
 554         if (!p_ptr) {
 555                 err = TIPC_ERR_NO_PORT;
 556         } else if (p_ptr->publ.connected) {
 557                 if ((port_peernode(p_ptr) != msg_orignode(msg)) ||
 558                     (port_peerport(p_ptr) != msg_origport(msg))) {
 559                         err = TIPC_ERR_NO_PORT;
 560                 } else if (msg_type(msg) == CONN_ACK) {
 561                         int wakeup = tipc_port_congested(p_ptr) &&
 562                                      p_ptr->publ.congested &&
 563                                      p_ptr->wakeup;
 564                         p_ptr->acked += msg_msgcnt(msg);
 565                         if (tipc_port_congested(p_ptr))
 566                                 goto exit;
 567                         p_ptr->publ.congested = 0;
 568                         if (!wakeup)
 569                                 goto exit;
 570                         p_ptr->wakeup(&p_ptr->publ);
 571                         goto exit;
 572                 }
 573         } else if (p_ptr->publ.published) {
 574                 err = TIPC_ERR_NO_PORT;
 575         }
 576         if (err) {
 577                 r_buf = port_build_proto_msg(msg_origport(msg),
 578                                              msg_orignode(msg),
 579                                              msg_destport(msg),
 580                                              tipc_own_addr,
 581                                              TIPC_HIGH_IMPORTANCE,
 582                                              TIPC_CONN_MSG,
 583                                              err,
 584                                              0,
 585                                              0);
 586                 goto exit;
 587         }
 588
 589         /* All is fine */
 590         if (msg_type(msg) == CONN_PROBE) {
 591                 r_buf = port_build_proto_msg(msg_origport(msg),
 592                                              msg_orignode(msg),
 593                                              msg_destport(msg),
 594                                              tipc_own_addr,
 595                                              CONN_MANAGER,
 596                                              CONN_PROBE_REPLY,
 597                                              TIPC_OK,
 598                                              port_out_seqno(p_ptr),
 599                                              0);
 600         }
 601         p_ptr->probing_state = CONFIRMED;
 602         port_incr_out_seqno(p_ptr);
 603 exit:
 604         if (p_ptr)
 605                 tipc_port_unlock(p_ptr);
 606         tipc_net_route_msg(r_buf);
 607         tipc_net_route_msg(abort_buf);
 608         buf_discard(buf);
 609 }
 610
 611 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
 612 {
 613         struct publication *publ;
 614
 615         if (full_id)
 616                 tipc_printf(buf, "<%u.%u.%u:%u>:",
 617                             tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
 618                             tipc_node(tipc_own_addr), p_ptr->publ.ref);
 619         else
 620                 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
 621
 622         if (p_ptr->publ.connected) {
 623                 u32 dport = port_peerport(p_ptr);
 624                 u32 destnode = port_peernode(p_ptr);
 625
 626                 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
 627                             tipc_zone(destnode), tipc_cluster(destnode),
 628                             tipc_node(destnode), dport);
 629                 if (p_ptr->publ.conn_type != 0)
 630                         tipc_printf(buf, " via {%u,%u}",
 631                                     p_ptr->publ.conn_type,
 632                                     p_ptr->publ.conn_instance);
 633         }
 634         else if (p_ptr->publ.published) {
 635                 tipc_printf(buf, " bound to");
 636                 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
 637                         if (publ->lower == publ->upper)
 638                                 tipc_printf(buf, " {%u,%u}", publ->type,
 639                                             publ->lower);
 640                         else
 641                                 tipc_printf(buf, " {%u,%u,%u}", publ->type,
 642                                             publ->lower, publ->upper);
 643                 }
 644         }
 645         tipc_printf(buf, "\n");
 646 }
 647
 648 #define MAX_PORT_QUERY 32768
 649
 650 struct sk_buff *tipc_port_get_ports(void)
 651 {
 652         struct sk_buff *buf;
 653         struct tlv_desc *rep_tlv;
 654         struct print_buf pb;
 655         struct port *p_ptr;
 656         int str_len;
 657
 658         buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
 659         if (!buf)
 660                 return NULL;
 661         rep_tlv = (struct tlv_desc *)buf->data;
 662
 663         tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
 664         spin_lock_bh(&tipc_port_list_lock);
 665         list_for_each_entry(p_ptr, &ports, port_list) {
 666                 spin_lock_bh(p_ptr->publ.lock);
 667                 port_print(p_ptr, &pb, 0);
 668                 spin_unlock_bh(p_ptr->publ.lock);
 669         }
 670         spin_unlock_bh(&tipc_port_list_lock);
 671         str_len = tipc_printbuf_validate(&pb);
 672
 673         skb_put(buf, TLV_SPACE(str_len));
 674         TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
 675
 676         return buf;
 677 }
 678
 679 void tipc_port_reinit(void)
 680 {
 681         struct port *p_ptr;
 682         struct tipc_msg *msg;
 683
 684         spin_lock_bh(&tipc_port_list_lock);
 685         list_for_each_entry(p_ptr, &ports, port_list) {
 686                 msg = &p_ptr->publ.phdr;
 687                 if (msg_orignode(msg) == tipc_own_addr)
 688                         break;
 689                 msg_set_prevnode(msg, tipc_own_addr);
 690                 msg_set_orignode(msg, tipc_own_addr);
 691         }
 692         spin_unlock_bh(&tipc_port_list_lock);
 693 }
 694
 695
 696 /*
 697  *  port_dispatcher_sigh(): Signal handler for messages destinated
 698  *                          to the tipc_port interface.
 699  */
 700
 701 static void port_dispatcher_sigh(void *dummy)
 702 {
 703         struct sk_buff *buf;
 704
 705         spin_lock_bh(&queue_lock);
 706         buf = msg_queue_head;
 707         msg_queue_head = NULL;
 708         spin_unlock_bh(&queue_lock);
 709
 710         while (buf) {
 711                 struct port *p_ptr;
 712                 struct user_port *up_ptr;
 713                 struct tipc_portid orig;
 714                 struct tipc_name_seq dseq;
 715                 void *usr_handle;
 716                 int connected;
 717                 int published;
 718                 u32 message_type;
 719
 720                 struct sk_buff *next = buf->next;
 721                 struct tipc_msg *msg = buf_msg(buf);
 722                 u32 dref = msg_destport(msg);
 723
 724                 message_type = msg_type(msg);
 725                 if (message_type > TIPC_DIRECT_MSG)
 726                         goto reject;    /* Unsupported message type */
 727
 728                 p_ptr = tipc_port_lock(dref);
 729                 if (!p_ptr)
 730                         goto reject;    /* Port deleted while msg in queue */
 731
 732                 orig.ref = msg_origport(msg);
 733                 orig.node = msg_orignode(msg);
 734                 up_ptr = p_ptr->user_port;
 735                 usr_handle = up_ptr->usr_handle;
 736                 connected = p_ptr->publ.connected;
 737                 published = p_ptr->publ.published;
 738
 739                 if (unlikely(msg_errcode(msg)))
 740                         goto err;
 741
 742                 switch (message_type) {
 743
 744                 case TIPC_CONN_MSG:{
 745                                 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
 746                                 u32 peer_port = port_peerport(p_ptr);
 747                                 u32 peer_node = port_peernode(p_ptr);
 748
 749                                 tipc_port_unlock(p_ptr);
 750                                 if (unlikely(!cb))
 751                                         goto reject;
 752                                 if (unlikely(!connected)) {
 753                                         if (tipc_connect2port(dref, &orig))
 754                                                 goto reject;
 755                                 } else if ((msg_origport(msg) != peer_port) ||
 756                                            (msg_orignode(msg) != peer_node))
 757                                         goto reject;
 758                                 if (unlikely(++p_ptr->publ.conn_unacked >=
 759                                              TIPC_FLOW_CONTROL_WIN))
 760                                         tipc_acknowledge(dref,
 761                                                          p_ptr->publ.conn_unacked);
 762                                 skb_pull(buf, msg_hdr_sz(msg));
 763                                 cb(usr_handle, dref, &buf, msg_data(msg),
 764                                    msg_data_sz(msg));
 765                                 break;
 766                         }
 767                 case TIPC_DIRECT_MSG:{
 768                                 tipc_msg_event cb = up_ptr->msg_cb;
 769
 770                                 tipc_port_unlock(p_ptr);
 771                                 if (unlikely(!cb || connected))
 772                                         goto reject;
 773                                 skb_pull(buf, msg_hdr_sz(msg));
 774                                 cb(usr_handle, dref, &buf, msg_data(msg),
 775                                    msg_data_sz(msg), msg_importance(msg),
 776                                    &orig);
 777                                 break;
 778                         }
 779                 case TIPC_MCAST_MSG:
 780                 case TIPC_NAMED_MSG:{
 781                                 tipc_named_msg_event cb = up_ptr->named_msg_cb;
 782
 783                                 tipc_port_unlock(p_ptr);
 784                                 if (unlikely(!cb || connected || !published))
 785                                         goto reject;
 786                                 dseq.type =  msg_nametype(msg);
 787                                 dseq.lower = msg_nameinst(msg);
 788                                 dseq.upper = (message_type == TIPC_NAMED_MSG)
 789                                         ? dseq.lower : msg_nameupper(msg);
 790                                 skb_pull(buf, msg_hdr_sz(msg));
 791                                 cb(usr_handle, dref, &buf, msg_data(msg),
 792                                    msg_data_sz(msg), msg_importance(msg),
 793                                    &orig, &dseq);
 794                                 break;
 795                         }
 796                 }
 797                 if (buf)
 798                         buf_discard(buf);
 799                 buf = next;
 800                 continue;
 801 err:
 802                 switch (message_type) {
 803
 804                 case TIPC_CONN_MSG:{
 805                                 tipc_conn_shutdown_event cb =
 806                                         up_ptr->conn_err_cb;
 807                                 u32 peer_port = port_peerport(p_ptr);
 808                                 u32 peer_node = port_peernode(p_ptr);
 809
 810                                 tipc_port_unlock(p_ptr);
 811                                 if (!cb || !connected)
 812                                         break;
 813                                 if ((msg_origport(msg) != peer_port) ||
 814                                     (msg_orignode(msg) != peer_node))
 815                                         break;
 816                                 tipc_disconnect(dref);
 817                                 skb_pull(buf, msg_hdr_sz(msg));
 818                                 cb(usr_handle, dref, &buf, msg_data(msg),
 819                                    msg_data_sz(msg), msg_errcode(msg));
 820                                 break;
 821                         }
 822                 case TIPC_DIRECT_MSG:{
 823                                 tipc_msg_err_event cb = up_ptr->err_cb;
 824
 825                                 tipc_port_unlock(p_ptr);
 826                                 if (!cb || connected)
 827                                         break;
 828                                 skb_pull(buf, msg_hdr_sz(msg));
 829                                 cb(usr_handle, dref, &buf, msg_data(msg),
 830                                    msg_data_sz(msg), msg_errcode(msg), &orig);
 831                                 break;
 832                         }
 833                 case TIPC_MCAST_MSG:
 834                 case TIPC_NAMED_MSG:{
 835                                 tipc_named_msg_err_event cb =
 836                                         up_ptr->named_err_cb;
 837
 838                                 tipc_port_unlock(p_ptr);
 839                                 if (!cb || connected)
 840                                         break;
 841                                 dseq.type =  msg_nametype(msg);
 842                                 dseq.lower = msg_nameinst(msg);
 843                                 dseq.upper = (message_type == TIPC_NAMED_MSG)
 844                                         ? dseq.lower : msg_nameupper(msg);
 845                                 skb_pull(buf, msg_hdr_sz(msg));
 846                                 cb(usr_handle, dref, &buf, msg_data(msg),
 847                                    msg_data_sz(msg), msg_errcode(msg), &dseq);
 848                                 break;
 849                         }
 850                 }
 851                 if (buf)
 852                         buf_discard(buf);
 853                 buf = next;
 854                 continue;
 855 reject:
 856                 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
 857                 buf = next;
 858         }
 859 }
 860
 861 /*
 862  *  port_dispatcher(): Dispatcher for messages destinated
 863  *  to the tipc_port interface. Called with port locked.
 864  */
 865
 866 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
 867 {
 868         buf->next = NULL;
 869         spin_lock_bh(&queue_lock);
 870         if (msg_queue_head) {
 871                 msg_queue_tail->next = buf;
 872                 msg_queue_tail = buf;
 873         } else {
 874                 msg_queue_tail = msg_queue_head = buf;
 875                 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
 876         }
 877         spin_unlock_bh(&queue_lock);
 878         return 0;
 879 }
 880
 881 /*
 882  * Wake up port after congestion: Called with port locked,
 883  *
 884  */
 885
 886 static void port_wakeup_sh(unsigned long ref)
 887 {
 888         struct port *p_ptr;
 889         struct user_port *up_ptr;
 890         tipc_continue_event cb = NULL;
 891         void *uh = NULL;
 892
 893         p_ptr = tipc_port_lock(ref);
 894         if (p_ptr) {
 895                 up_ptr = p_ptr->user_port;
 896                 if (up_ptr) {
 897                         cb = up_ptr->continue_event_cb;
 898                         uh = up_ptr->usr_handle;
 899                 }
 900                 tipc_port_unlock(p_ptr);
 901         }
 902         if (cb)
 903                 cb(uh, ref);
 904 }
 905
 906
 907 static void port_wakeup(struct tipc_port *p_ptr)
 908 {
 909         tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
 910 }
 911
 912 void tipc_acknowledge(u32 ref, u32 ack)
 913 {
 914         struct port *p_ptr;
 915         struct sk_buff *buf = NULL;
 916
 917         p_ptr = tipc_port_lock(ref);
 918         if (!p_ptr)
 919                 return;
 920         if (p_ptr->publ.connected) {
 921                 p_ptr->publ.conn_unacked -= ack;
 922                 buf = port_build_proto_msg(port_peerport(p_ptr),
 923                                            port_peernode(p_ptr),
 924                                            ref,
 925                                            tipc_own_addr,
 926                                            CONN_MANAGER,
 927                                            CONN_ACK,
 928                                            TIPC_OK,
 929                                            port_out_seqno(p_ptr),
 930                                            ack);
 931         }
 932         tipc_port_unlock(p_ptr);
 933         tipc_net_route_msg(buf);
 934 }
 935
 936 /*
 937  * tipc_createport(): user level call. Will add port to
 938  *                    registry if non-zero user_ref.
 939  */
 940
 941 int tipc_createport(u32 user_ref,
 942                     void *usr_handle,
 943                     unsigned int importance,
 944                     tipc_msg_err_event error_cb,
 945                     tipc_named_msg_err_event named_error_cb,
 946                     tipc_conn_shutdown_event conn_error_cb,
 947                     tipc_msg_event msg_cb,
 948                     tipc_named_msg_event named_msg_cb,
 949                     tipc_conn_msg_event conn_msg_cb,
 950                     tipc_continue_event continue_event_cb,/* May be zero */
 951                     u32 *portref)
 952 {
 953         struct user_port *up_ptr;
 954         struct port *p_ptr;
 955
 956         up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
 957         if (!up_ptr) {
 958                 warn("Port creation failed, no memory\n");
 959                 return -ENOMEM;
 960         }
 961         p_ptr = (struct port *)tipc_createport_raw(NULL, port_dispatcher,
 962                                                    port_wakeup, importance);
 963         if (!p_ptr) {
 964                 kfree(up_ptr);
 965                 return -ENOMEM;
 966         }
 967
 968         p_ptr->user_port = up_ptr;
 969         up_ptr->user_ref = user_ref;
 970         up_ptr->usr_handle = usr_handle;
 971         up_ptr->ref = p_ptr->publ.ref;
 972         up_ptr->err_cb = error_cb;
 973         up_ptr->named_err_cb = named_error_cb;
 974         up_ptr->conn_err_cb = conn_error_cb;
 975         up_ptr->msg_cb = msg_cb;
 976         up_ptr->named_msg_cb = named_msg_cb;
 977         up_ptr->conn_msg_cb = conn_msg_cb;
 978         up_ptr->continue_event_cb = continue_event_cb;
 979         INIT_LIST_HEAD(&up_ptr->uport_list);
 980         tipc_reg_add_port(up_ptr);
 981         *portref = p_ptr->publ.ref;
 982         tipc_port_unlock(p_ptr);
 983         return 0;
 984 }
 985
 986 int tipc_portimportance(u32 ref, unsigned int *importance)
 987 {
 988         struct port *p_ptr;
 989
 990         p_ptr = tipc_port_lock(ref);
 991         if (!p_ptr)
 992                 return -EINVAL;
 993         *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
 994         tipc_port_unlock(p_ptr);
 995         return 0;
 996 }
 997
 998 int tipc_set_portimportance(u32 ref, unsigned int imp)
 999 {
1000         struct port *p_ptr;
1001
1002         if (imp > TIPC_CRITICAL_IMPORTANCE)
1003                 return -EINVAL;
1004
1005         p_ptr = tipc_port_lock(ref);
1006         if (!p_ptr)
1007                 return -EINVAL;
1008         msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1009         tipc_port_unlock(p_ptr);
1010         return 0;
1011 }
1012
1013
1014 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1015 {
1016         struct port *p_ptr;
1017         struct publication *publ;
1018         u32 key;
1019         int res = -EINVAL;
1020
1021         p_ptr = tipc_port_lock(ref);
1022         if (!p_ptr)
1023                 return -EINVAL;
1024
1025         dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1026             "lower = %u, upper = %u\n",
1027             ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1028         if (p_ptr->publ.connected)
1029                 goto exit;
1030         if (seq->lower > seq->upper)
1031                 goto exit;
1032         if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1033                 goto exit;
1034         key = ref + p_ptr->pub_count + 1;
1035         if (key == ref) {
1036                 res = -EADDRINUSE;
1037                 goto exit;
1038         }
1039         publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1040                                     scope, p_ptr->publ.ref, key);
1041         if (publ) {
1042                 list_add(&publ->pport_list, &p_ptr->publications);
1043                 p_ptr->pub_count++;
1044                 p_ptr->publ.published = 1;
1045                 res = 0;
1046         }
1047 exit:
1048         tipc_port_unlock(p_ptr);
1049         return res;
1050 }
1051
1052 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1053 {
1054         struct port *p_ptr;
1055         struct publication *publ;
1056         struct publication *tpubl;
1057         int res = -EINVAL;
1058
1059         p_ptr = tipc_port_lock(ref);
1060         if (!p_ptr)
1061                 return -EINVAL;
1062         if (!seq) {
1063                 list_for_each_entry_safe(publ, tpubl,
1064                                          &p_ptr->publications, pport_list) {
1065                         tipc_nametbl_withdraw(publ->type, publ->lower,
1066                                               publ->ref, publ->key);
1067                 }
1068                 res = 0;
1069         } else {
1070                 list_for_each_entry_safe(publ, tpubl,
1071                                          &p_ptr->publications, pport_list) {
1072                         if (publ->scope != scope)
1073                                 continue;
1074                         if (publ->type != seq->type)
1075                                 continue;
1076                         if (publ->lower != seq->lower)
1077                                 continue;
1078                         if (publ->upper != seq->upper)
1079                                 break;
1080                         tipc_nametbl_withdraw(publ->type, publ->lower,
1081                                               publ->ref, publ->key);
1082                         res = 0;
1083                         break;
1084                 }
1085         }
1086         if (list_empty(&p_ptr->publications))
1087                 p_ptr->publ.published = 0;
1088         tipc_port_unlock(p_ptr);
1089         return res;
1090 }
1091
1092 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1093 {
1094         struct port *p_ptr;
1095         struct tipc_msg *msg;
1096         int res = -EINVAL;
1097
1098         p_ptr = tipc_port_lock(ref);
1099         if (!p_ptr)
1100                 return -EINVAL;
1101         if (p_ptr->publ.published || p_ptr->publ.connected)
1102                 goto exit;
1103         if (!peer->ref)
1104                 goto exit;
1105
1106         msg = &p_ptr->publ.phdr;
1107         msg_set_destnode(msg, peer->node);
1108         msg_set_destport(msg, peer->ref);
1109         msg_set_orignode(msg, tipc_own_addr);
1110         msg_set_origport(msg, p_ptr->publ.ref);
1111         msg_set_transp_seqno(msg, 42);
1112         msg_set_type(msg, TIPC_CONN_MSG);
1113         msg_set_hdr_sz(msg, SHORT_H_SIZE);
1114
1115         p_ptr->probing_interval = PROBING_INTERVAL;
1116         p_ptr->probing_state = CONFIRMED;
1117         p_ptr->publ.connected = 1;
1118         k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1119
1120         tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1121                           (void *)(unsigned long)ref,
1122                           (net_ev_handler)port_handle_node_down);
1123         res = 0;
1124 exit:
1125         tipc_port_unlock(p_ptr);
1126         p_ptr->publ.max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1127         return res;
1128 }
1129
1130 /**
1131  * tipc_disconnect_port - disconnect port from peer
1132  *
1133  * Port must be locked.
1134  */
1135
1136 int tipc_disconnect_port(struct tipc_port *tp_ptr)
1137 {
1138         int res;
1139
1140         if (tp_ptr->connected) {
1141                 tp_ptr->connected = 0;
1142                 /* let timer expire on it's own to avoid deadlock! */
1143                 tipc_nodesub_unsubscribe(
1144                         &((struct port *)tp_ptr)->subscription);
1145                 res = 0;
1146         } else {
1147                 res = -ENOTCONN;
1148         }
1149         return res;
1150 }
1151
1152 /*
1153  * tipc_disconnect(): Disconnect port form peer.
1154  *                    This is a node local operation.
1155  */
1156
1157 int tipc_disconnect(u32 ref)
1158 {
1159         struct port *p_ptr;
1160         int res;
1161
1162         p_ptr = tipc_port_lock(ref);
1163         if (!p_ptr)
1164                 return -EINVAL;
1165         res = tipc_disconnect_port((struct tipc_port *)p_ptr);
1166         tipc_port_unlock(p_ptr);
1167         return res;
1168 }
1169
1170 /*
1171  * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1172  */
1173 int tipc_shutdown(u32 ref)
1174 {
1175         struct port *p_ptr;
1176         struct sk_buff *buf = NULL;
1177
1178         p_ptr = tipc_port_lock(ref);
1179         if (!p_ptr)
1180                 return -EINVAL;
1181
1182         if (p_ptr->publ.connected) {
1183                 u32 imp = msg_importance(&p_ptr->publ.phdr);
1184                 if (imp < TIPC_CRITICAL_IMPORTANCE)
1185                         imp++;
1186                 buf = port_build_proto_msg(port_peerport(p_ptr),
1187                                            port_peernode(p_ptr),
1188                                            ref,
1189                                            tipc_own_addr,
1190                                            imp,
1191                                            TIPC_CONN_MSG,
1192                                            TIPC_CONN_SHUTDOWN,
1193                                            port_out_seqno(p_ptr),
1194                                            0);
1195         }
1196         tipc_port_unlock(p_ptr);
1197         tipc_net_route_msg(buf);
1198         return tipc_disconnect(ref);
1199 }
1200
1201 /*
1202  *  tipc_port_recv_sections(): Concatenate and deliver sectioned
1203  *                        message for this node.
1204  */
1205
1206 static int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1207                                    struct iovec const *msg_sect)
1208 {
1209         struct sk_buff *buf;
1210         int res;
1211
1212         res = tipc_msg_build(&sender->publ.phdr, msg_sect, num_sect,
1213                         MAX_MSG_SIZE, !sender->user_port, &buf);
1214         if (likely(buf))
1215                 tipc_port_recv_msg(buf);
1216         return res;
1217 }
1218
1219 /**
1220  * tipc_send - send message sections on connection
1221  */
1222
1223 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1224 {
1225         struct port *p_ptr;
1226         u32 destnode;
1227         int res;
1228
1229         p_ptr = tipc_port_deref(ref);
1230         if (!p_ptr || !p_ptr->publ.connected)
1231                 return -EINVAL;
1232
1233         p_ptr->publ.congested = 1;
1234         if (!tipc_port_congested(p_ptr)) {
1235                 destnode = port_peernode(p_ptr);
1236                 if (likely(destnode != tipc_own_addr))
1237                         res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1238                                                            destnode);
1239                 else
1240                         res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1241
1242                 if (likely(res != -ELINKCONG)) {
1243                         port_incr_out_seqno(p_ptr);
1244                         p_ptr->publ.congested = 0;
1245                         p_ptr->sent++;
1246                         return res;
1247                 }
1248         }
1249         if (port_unreliable(p_ptr)) {
1250                 p_ptr->publ.congested = 0;
1251                 /* Just calculate msg length and return */
1252                 return tipc_msg_calc_data_size(msg_sect, num_sect);
1253         }
1254         return -ELINKCONG;
1255 }
1256
1257 /**
1258  * tipc_send2name - send message sections to port name
1259  */
1260
1261 int tipc_send2name(u32 ref, struct tipc_name const *name, unsigned int domain,
1262            unsigned int num_sect, struct iovec const *msg_sect)
1263 {
1264         struct port *p_ptr;
1265         struct tipc_msg *msg;
1266         u32 destnode = domain;
1267         u32 destport;
1268         int res;
1269
1270         p_ptr = tipc_port_deref(ref);
1271         if (!p_ptr || p_ptr->publ.connected)
1272                 return -EINVAL;
1273
1274         msg = &p_ptr->publ.phdr;
1275         msg_set_type(msg, TIPC_NAMED_MSG);
1276         msg_set_orignode(msg, tipc_own_addr);
1277         msg_set_origport(msg, ref);
1278         msg_set_hdr_sz(msg, LONG_H_SIZE);
1279         msg_set_nametype(msg, name->type);
1280         msg_set_nameinst(msg, name->instance);
1281         msg_set_lookup_scope(msg, tipc_addr_scope(domain));
1282         destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1283         msg_set_destnode(msg, destnode);
1284         msg_set_destport(msg, destport);
1285
1286         if (likely(destport)) {
1287                 p_ptr->sent++;
1288                 if (likely(destnode == tipc_own_addr))
1289                         return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1290                 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1291                                                    destnode);
1292                 if (likely(res != -ELINKCONG))
1293                         return res;
1294                 if (port_unreliable(p_ptr)) {
1295                         /* Just calculate msg length and return */
1296                         return tipc_msg_calc_data_size(msg_sect, num_sect);
1297                 }
1298                 return -ELINKCONG;
1299         }
1300         return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1301                                          TIPC_ERR_NO_NAME);
1302 }
1303
1304 /**
1305  * tipc_send2port - send message sections to port identity
1306  */
1307
1308 int tipc_send2port(u32 ref, struct tipc_portid const *dest,
1309            unsigned int num_sect, struct iovec const *msg_sect)
1310 {
1311         struct port *p_ptr;
1312         struct tipc_msg *msg;
1313         int res;
1314
1315         p_ptr = tipc_port_deref(ref);
1316         if (!p_ptr || p_ptr->publ.connected)
1317                 return -EINVAL;
1318
1319         msg = &p_ptr->publ.phdr;
1320         msg_set_type(msg, TIPC_DIRECT_MSG);
1321         msg_set_orignode(msg, tipc_own_addr);
1322         msg_set_origport(msg, ref);
1323         msg_set_destnode(msg, dest->node);
1324         msg_set_destport(msg, dest->ref);
1325         msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1326         p_ptr->sent++;
1327         if (dest->node == tipc_own_addr)
1328                 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1329         res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1330         if (likely(res != -ELINKCONG))
1331                 return res;
1332         if (port_unreliable(p_ptr)) {
1333                 /* Just calculate msg length and return */
1334                 return tipc_msg_calc_data_size(msg_sect, num_sect);
1335         }
1336         return -ELINKCONG;
1337 }
1338
1339 /**
1340  * tipc_send_buf2port - send message buffer to port identity
1341  */
1342
1343 int tipc_send_buf2port(u32 ref, struct tipc_portid const *dest,
1344                struct sk_buff *buf, unsigned int dsz)
1345 {
1346         struct port *p_ptr;
1347         struct tipc_msg *msg;
1348         int res;
1349
1350         p_ptr = (struct port *)tipc_ref_deref(ref);
1351         if (!p_ptr || p_ptr->publ.connected)
1352                 return -EINVAL;
1353
1354         msg = &p_ptr->publ.phdr;
1355         msg_set_type(msg, TIPC_DIRECT_MSG);
1356         msg_set_orignode(msg, tipc_own_addr);
1357         msg_set_origport(msg, ref);
1358         msg_set_destnode(msg, dest->node);
1359         msg_set_destport(msg, dest->ref);
1360         msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1361         msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1362         if (skb_cow(buf, DIR_MSG_H_SIZE))
1363                 return -ENOMEM;
1364
1365         skb_push(buf, DIR_MSG_H_SIZE);
1366         skb_copy_to_linear_data(buf, msg, DIR_MSG_H_SIZE);
1367         msg_dbg(msg, "buf2port: ");
1368         p_ptr->sent++;
1369         if (dest->node == tipc_own_addr)
1370                 return tipc_port_recv_msg(buf);
1371         res = tipc_send_buf_fast(buf, dest->node);
1372         if (likely(res != -ELINKCONG))
1373                 return res;
1374         if (port_unreliable(p_ptr))
1375                 return dsz;
1376         return -ELINKCONG;
1377 }
1378