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 "dbg.h"
  40 #include "port.h"
  41 #include "addr.h"
  42 #include "link.h"
  43 #include "node.h"
  44 #include "name_table.h"
  45 #include "user_reg.h"
  46 #include "msg.h"
  47 #include "bcast.h"
  48
  49 /* Connection management: */
  50 #define PROBING_INTERVAL 3600000        /* [ms] => 1 h */
  51 #define CONFIRMED 0
  52 #define PROBING 1
  53
  54 #define MAX_REJECT_SIZE 1024
  55
  56 static struct sk_buff *msg_queue_head = NULL;
  57 static struct sk_buff *msg_queue_tail = NULL;
  58
  59 DEFINE_SPINLOCK(tipc_port_list_lock);
  60 static DEFINE_SPINLOCK(queue_lock);
  61
  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);
  67
  68
  69 static u32 port_peernode(struct port *p_ptr)
  70 {
  71         return msg_destnode(&p_ptr->publ.phdr);
  72 }
  73
  74 static u32 port_peerport(struct port *p_ptr)
  75 {
  76         return msg_destport(&p_ptr->publ.phdr);
  77 }
  78
  79 static u32 port_out_seqno(struct port *p_ptr)
  80 {
  81         return msg_transp_seqno(&p_ptr->publ.phdr);
  82 }
  83
  84 static void port_incr_out_seqno(struct port *p_ptr)
  85 {
  86         struct tipc_msg *m = &p_ptr->publ.phdr;
  87
  88         if (likely(!msg_routed(m)))
  89                 return;
  90         msg_set_transp_seqno(m, (msg_transp_seqno(m) + 1));
  91 }
  92
  93 /**
  94  * tipc_multicast - send a multicast message to local and remote destinations
  95  */
  96
  97 int tipc_multicast(u32 ref, struct tipc_name_seq const *seq, u32 domain,
  98                    u32 num_sect, struct iovec const *msg_sect)
  99 {
 100         struct tipc_msg *hdr;
 101         struct sk_buff *buf;
 102         struct sk_buff *ibuf = NULL;
 103         struct port_list dports = {0, NULL, };
 104         struct port *oport = tipc_port_deref(ref);
 105         int ext_targets;
 106         int res;
 107
 108         if (unlikely(!oport))
 109                 return -EINVAL;
 110
 111         /* Create multicast message */
 112
 113         hdr = &oport->publ.phdr;
 114         msg_set_type(hdr, TIPC_MCAST_MSG);
 115         msg_set_nametype(hdr, seq->type);
 116         msg_set_namelower(hdr, seq->lower);
 117         msg_set_nameupper(hdr, seq->upper);
 118         msg_set_hdr_sz(hdr, MCAST_H_SIZE);
 119         res = tipc_msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
 120                         !oport->user_port, &buf);
 121         if (unlikely(!buf))
 122                 return res;
 123
 124         /* Figure out where to send multicast message */
 125
 126         ext_targets = tipc_nametbl_mc_translate(seq->type, seq->lower, seq->upper,
 127                                                 TIPC_NODE_SCOPE, &dports);
 128
 129         /* Send message to destinations (duplicate it only if necessary) */
 130
 131         if (ext_targets) {
 132                 if (dports.count != 0) {
 133                         ibuf = skb_copy(buf, GFP_ATOMIC);
 134                         if (ibuf == NULL) {
 135                                 tipc_port_list_free(&dports);
 136                                 buf_discard(buf);
 137                                 return -ENOMEM;
 138                         }
 139                 }
 140                 res = tipc_bclink_send_msg(buf);
 141                 if ((res < 0) && (dports.count != 0)) {
 142                         buf_discard(ibuf);
 143                 }
 144         } else {
 145                 ibuf = buf;
 146         }
 147
 148         if (res >= 0) {
 149                 if (ibuf)
 150                         tipc_port_recv_mcast(ibuf, &dports);
 151         } else {
 152                 tipc_port_list_free(&dports);
 153         }
 154         return res;
 155 }
 156
 157 /**
 158  * tipc_port_recv_mcast - deliver multicast message to all destination ports
 159  *
 160  * If there is no port list, perform a lookup to create one
 161  */
 162
 163 void tipc_port_recv_mcast(struct sk_buff *buf, struct port_list *dp)
 164 {
 165         struct tipc_msg* msg;
 166         struct port_list dports = {0, NULL, };
 167         struct port_list *item = dp;
 168         int cnt = 0;
 169
 170         msg = buf_msg(buf);
 171
 172         /* Create destination port list, if one wasn't supplied */
 173
 174         if (dp == NULL) {
 175                 tipc_nametbl_mc_translate(msg_nametype(msg),
 176                                      msg_namelower(msg),
 177                                      msg_nameupper(msg),
 178                                      TIPC_CLUSTER_SCOPE,
 179                                      &dports);
 180                 item = dp = &dports;
 181         }
 182
 183         /* Deliver a copy of message to each destination port */
 184
 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);
 190                         return;
 191                 }
 192                 for (; cnt < dp->count; cnt++) {
 193                         int index = cnt % PLSIZE;
 194                         struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
 195
 196                         if (b == NULL) {
 197                                 warn("Unable to deliver multicast message(s)\n");
 198                                 msg_dbg(msg, "LOST:");
 199                                 goto exit;
 200                         }
 201                         if ((index == 0) && (cnt != 0)) {
 202                                 item = item->next;
 203                         }
 204                         msg_set_destport(buf_msg(b),item->ports[index]);
 205                         tipc_port_recv_msg(b);
 206                 }
 207         }
 208 exit:
 209         buf_discard(buf);
 210         tipc_port_list_free(dp);
 211 }
 212
 213 /**
 214  * tipc_createport_raw - create a generic TIPC port
 215  *
 216  * Returns pointer to (locked) TIPC port, or NULL if unable to create it
 217  */
 218
 219 struct tipc_port *tipc_createport_raw(void *usr_handle,
 220                         u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
 221                         void (*wakeup)(struct tipc_port *),
 222                         const u32 importance)
 223 {
 224         struct port *p_ptr;
 225         struct tipc_msg *msg;
 226         u32 ref;
 227
 228         p_ptr = kzalloc(sizeof(*p_ptr), GFP_ATOMIC);
 229         if (!p_ptr) {
 230                 warn("Port creation failed, no memory\n");
 231                 return NULL;
 232         }
 233         ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
 234         if (!ref) {
 235                 warn("Port creation failed, reference table exhausted\n");
 236                 kfree(p_ptr);
 237                 return NULL;
 238         }
 239
 240         p_ptr->publ.usr_handle = usr_handle;
 241         p_ptr->publ.max_pkt = MAX_PKT_DEFAULT;
 242         p_ptr->publ.ref = ref;
 243         msg = &p_ptr->publ.phdr;
 244         tipc_msg_init(msg, importance, TIPC_NAMED_MSG, LONG_H_SIZE, 0);
 245         msg_set_origport(msg, ref);
 246         p_ptr->last_in_seqno = 41;
 247         p_ptr->sent = 1;
 248         INIT_LIST_HEAD(&p_ptr->wait_list);
 249         INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
 250         p_ptr->dispatcher = dispatcher;
 251         p_ptr->wakeup = wakeup;
 252         p_ptr->user_port = NULL;
 253         k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
 254         spin_lock_bh(&tipc_port_list_lock);
 255         INIT_LIST_HEAD(&p_ptr->publications);
 256         INIT_LIST_HEAD(&p_ptr->port_list);
 257         list_add_tail(&p_ptr->port_list, &ports);
 258         spin_unlock_bh(&tipc_port_list_lock);
 259         return &(p_ptr->publ);
 260 }
 261
 262 int tipc_deleteport(u32 ref)
 263 {
 264         struct port *p_ptr;
 265         struct sk_buff *buf = NULL;
 266
 267         tipc_withdraw(ref, 0, NULL);
 268         p_ptr = tipc_port_lock(ref);
 269         if (!p_ptr)
 270                 return -EINVAL;
 271
 272         tipc_ref_discard(ref);
 273         tipc_port_unlock(p_ptr);
 274
 275         k_cancel_timer(&p_ptr->timer);
 276         if (p_ptr->publ.connected) {
 277                 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
 278                 tipc_nodesub_unsubscribe(&p_ptr->subscription);
 279         }
 280         if (p_ptr->user_port) {
 281                 tipc_reg_remove_port(p_ptr->user_port);
 282                 kfree(p_ptr->user_port);
 283         }
 284
 285         spin_lock_bh(&tipc_port_list_lock);
 286         list_del(&p_ptr->port_list);
 287         list_del(&p_ptr->wait_list);
 288         spin_unlock_bh(&tipc_port_list_lock);
 289         k_term_timer(&p_ptr->timer);
 290         kfree(p_ptr);
 291         dbg("Deleted port %u\n", ref);
 292         tipc_net_route_msg(buf);
 293         return 0;
 294 }
 295
 296 static int port_unreliable(struct port *p_ptr)
 297 {
 298         return msg_src_droppable(&p_ptr->publ.phdr);
 299 }
 300
 301 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
 302 {
 303         struct port *p_ptr;
 304
 305         p_ptr = tipc_port_lock(ref);
 306         if (!p_ptr)
 307                 return -EINVAL;
 308         *isunreliable = port_unreliable(p_ptr);
 309         tipc_port_unlock(p_ptr);
 310         return 0;
 311 }
 312
 313 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
 314 {
 315         struct port *p_ptr;
 316
 317         p_ptr = tipc_port_lock(ref);
 318         if (!p_ptr)
 319                 return -EINVAL;
 320         msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
 321         tipc_port_unlock(p_ptr);
 322         return 0;
 323 }
 324
 325 static int port_unreturnable(struct port *p_ptr)
 326 {
 327         return msg_dest_droppable(&p_ptr->publ.phdr);
 328 }
 329
 330 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
 331 {
 332         struct port *p_ptr;
 333
 334         p_ptr = tipc_port_lock(ref);
 335         if (!p_ptr)
 336                 return -EINVAL;
 337         *isunrejectable = port_unreturnable(p_ptr);
 338         tipc_port_unlock(p_ptr);
 339         return 0;
 340 }
 341
 342 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
 343 {
 344         struct port *p_ptr;
 345
 346         p_ptr = tipc_port_lock(ref);
 347         if (!p_ptr)
 348                 return -EINVAL;
 349         msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
 350         tipc_port_unlock(p_ptr);
 351         return 0;
 352 }
 353
 354 /*
 355  * port_build_proto_msg(): build a port level protocol
 356  * or a connection abortion message. Called with
 357  * tipc_port lock on.
 358  */
 359 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
 360                                             u32 origport, u32 orignode,
 361                                             u32 usr, u32 type, u32 err,
 362                                             u32 seqno, u32 ack)
 363 {
 364         struct sk_buff *buf;
 365         struct tipc_msg *msg;
 366
 367         buf = tipc_buf_acquire(LONG_H_SIZE);
 368         if (buf) {
 369                 msg = buf_msg(buf);
 370                 tipc_msg_init(msg, usr, type, LONG_H_SIZE, destnode);
 371                 msg_set_errcode(msg, err);
 372                 msg_set_destport(msg, destport);
 373                 msg_set_origport(msg, origport);
 374                 msg_set_orignode(msg, orignode);
 375                 msg_set_transp_seqno(msg, seqno);
 376                 msg_set_msgcnt(msg, ack);
 377                 msg_dbg(msg, "PORT>SEND>:");
 378         }
 379         return buf;
 380 }
 381
 382 int tipc_reject_msg(struct sk_buff *buf, u32 err)
 383 {
 384         struct tipc_msg *msg = buf_msg(buf);
 385         struct sk_buff *rbuf;
 386         struct tipc_msg *rmsg;
 387         int hdr_sz;
 388         u32 imp = msg_importance(msg);
 389         u32 data_sz = msg_data_sz(msg);
 390
 391         if (data_sz > MAX_REJECT_SIZE)
 392                 data_sz = MAX_REJECT_SIZE;
 393         if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
 394                 imp++;
 395         msg_dbg(msg, "port->rej: ");
 396
 397         /* discard rejected message if it shouldn't be returned to sender */
 398         if (msg_errcode(msg) || msg_dest_droppable(msg)) {
 399                 buf_discard(buf);
 400                 return data_sz;
 401         }
 402
 403         /* construct rejected message */
 404         if (msg_mcast(msg))
 405                 hdr_sz = MCAST_H_SIZE;
 406         else
 407                 hdr_sz = LONG_H_SIZE;
 408         rbuf = tipc_buf_acquire(data_sz + hdr_sz);
 409         if (rbuf == NULL) {
 410                 buf_discard(buf);
 411                 return data_sz;
 412         }
 413         rmsg = buf_msg(rbuf);
 414         tipc_msg_init(rmsg, imp, msg_type(msg), hdr_sz, msg_orignode(msg));
 415         msg_set_errcode(rmsg, err);
 416         msg_set_destport(rmsg, msg_origport(msg));
 417         msg_set_origport(rmsg, msg_destport(msg));
 418         if (msg_short(msg)) {
 419                 msg_set_orignode(rmsg, tipc_own_addr);
 420                 /* leave name type & instance as zeroes */
 421         } else {
 422                 msg_set_orignode(rmsg, msg_destnode(msg));
 423                 msg_set_nametype(rmsg, msg_nametype(msg));
 424                 msg_set_nameinst(rmsg, msg_nameinst(msg));
 425         }
 426         msg_set_size(rmsg, data_sz + hdr_sz);
 427         skb_copy_to_linear_data_offset(rbuf, hdr_sz, msg_data(msg), data_sz);
 428
 429         /* send self-abort message when rejecting on a connected port */
 430         if (msg_connected(msg)) {
 431                 struct sk_buff *abuf = NULL;
 432                 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
 433
 434                 if (p_ptr) {
 435                         if (p_ptr->publ.connected)
 436                                 abuf = port_build_self_abort_msg(p_ptr, err);
 437                         tipc_port_unlock(p_ptr);
 438                 }
 439                 tipc_net_route_msg(abuf);
 440         }
 441
 442         /* send rejected message */
 443         buf_discard(buf);
 444         tipc_net_route_msg(rbuf);
 445         return data_sz;
 446 }
 447
 448 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
 449                               struct iovec const *msg_sect, u32 num_sect,
 450                               int err)
 451 {
 452         struct sk_buff *buf;
 453         int res;
 454
 455         res = tipc_msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
 456                         !p_ptr->user_port, &buf);
 457         if (!buf)
 458                 return res;
 459
 460         return tipc_reject_msg(buf, err);
 461 }
 462
 463 static void port_timeout(unsigned long ref)
 464 {
 465         struct port *p_ptr = tipc_port_lock(ref);
 466         struct sk_buff *buf = NULL;
 467
 468         if (!p_ptr)
 469                 return;
 470
 471         if (!p_ptr->publ.connected) {
 472                 tipc_port_unlock(p_ptr);
 473                 return;
 474         }
 475
 476         /* Last probe answered ? */
 477         if (p_ptr->probing_state == PROBING) {
 478                 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
 479         } else {
 480                 buf = port_build_proto_msg(port_peerport(p_ptr),
 481                                            port_peernode(p_ptr),
 482                                            p_ptr->publ.ref,
 483                                            tipc_own_addr,
 484                                            CONN_MANAGER,
 485                                            CONN_PROBE,
 486                                            TIPC_OK,
 487                                            port_out_seqno(p_ptr),
 488                                            0);
 489                 port_incr_out_seqno(p_ptr);
 490                 p_ptr->probing_state = PROBING;
 491                 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
 492         }
 493         tipc_port_unlock(p_ptr);
 494         tipc_net_route_msg(buf);
 495 }
 496
 497
 498 static void port_handle_node_down(unsigned long ref)
 499 {
 500         struct port *p_ptr = tipc_port_lock(ref);
 501         struct sk_buff* buf = NULL;
 502
 503         if (!p_ptr)
 504                 return;
 505         buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
 506         tipc_port_unlock(p_ptr);
 507         tipc_net_route_msg(buf);
 508 }
 509
 510
 511 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
 512 {
 513         u32 imp = msg_importance(&p_ptr->publ.phdr);
 514
 515         if (!p_ptr->publ.connected)
 516                 return NULL;
 517         if (imp < TIPC_CRITICAL_IMPORTANCE)
 518                 imp++;
 519         return port_build_proto_msg(p_ptr->publ.ref,
 520                                     tipc_own_addr,
 521                                     port_peerport(p_ptr),
 522                                     port_peernode(p_ptr),
 523                                     imp,
 524                                     TIPC_CONN_MSG,
 525                                     err,
 526                                     p_ptr->last_in_seqno + 1,
 527                                     0);
 528 }
 529
 530
 531 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
 532 {
 533         u32 imp = msg_importance(&p_ptr->publ.phdr);
 534
 535         if (!p_ptr->publ.connected)
 536                 return NULL;
 537         if (imp < TIPC_CRITICAL_IMPORTANCE)
 538                 imp++;
 539         return port_build_proto_msg(port_peerport(p_ptr),
 540                                     port_peernode(p_ptr),
 541                                     p_ptr->publ.ref,
 542                                     tipc_own_addr,
 543                                     imp,
 544                                     TIPC_CONN_MSG,
 545                                     err,
 546                                     port_out_seqno(p_ptr),
 547                                     0);
 548 }
 549
 550 void tipc_port_recv_proto_msg(struct sk_buff *buf)
 551 {
 552         struct tipc_msg *msg = buf_msg(buf);
 553         struct port *p_ptr = tipc_port_lock(msg_destport(msg));
 554         u32 err = TIPC_OK;
 555         struct sk_buff *r_buf = NULL;
 556         struct sk_buff *abort_buf = NULL;
 557
 558         msg_dbg(msg, "PORT<RECV<:");
 559
 560         if (!p_ptr) {
 561                 err = TIPC_ERR_NO_PORT;
 562         } else if (p_ptr->publ.connected) {
 563                 if ((port_peernode(p_ptr) != msg_orignode(msg)) ||
 564                     (port_peerport(p_ptr) != msg_origport(msg))) {
 565                         err = TIPC_ERR_NO_PORT;
 566                 } else if (msg_type(msg) == CONN_ACK) {
 567                         int wakeup = tipc_port_congested(p_ptr) &&
 568                                      p_ptr->publ.congested &&
 569                                      p_ptr->wakeup;
 570                         p_ptr->acked += msg_msgcnt(msg);
 571                         if (tipc_port_congested(p_ptr))
 572                                 goto exit;
 573                         p_ptr->publ.congested = 0;
 574                         if (!wakeup)
 575                                 goto exit;
 576                         p_ptr->wakeup(&p_ptr->publ);
 577                         goto exit;
 578                 }
 579         } else if (p_ptr->publ.published) {
 580                 err = TIPC_ERR_NO_PORT;
 581         }
 582         if (err) {
 583                 r_buf = port_build_proto_msg(msg_origport(msg),
 584                                              msg_orignode(msg),
 585                                              msg_destport(msg),
 586                                              tipc_own_addr,
 587                                              TIPC_HIGH_IMPORTANCE,
 588                                              TIPC_CONN_MSG,
 589                                              err,
 590                                              0,
 591                                              0);
 592                 goto exit;
 593         }
 594
 595         /* All is fine */
 596         if (msg_type(msg) == CONN_PROBE) {
 597                 r_buf = port_build_proto_msg(msg_origport(msg),
 598                                              msg_orignode(msg),
 599                                              msg_destport(msg),
 600                                              tipc_own_addr,
 601                                              CONN_MANAGER,
 602                                              CONN_PROBE_REPLY,
 603                                              TIPC_OK,
 604                                              port_out_seqno(p_ptr),
 605                                              0);
 606         }
 607         p_ptr->probing_state = CONFIRMED;
 608         port_incr_out_seqno(p_ptr);
 609 exit:
 610         if (p_ptr)
 611                 tipc_port_unlock(p_ptr);
 612         tipc_net_route_msg(r_buf);
 613         tipc_net_route_msg(abort_buf);
 614         buf_discard(buf);
 615 }
 616
 617 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
 618 {
 619         struct publication *publ;
 620
 621         if (full_id)
 622                 tipc_printf(buf, "<%u.%u.%u:%u>:",
 623                             tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
 624                             tipc_node(tipc_own_addr), p_ptr->publ.ref);
 625         else
 626                 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
 627
 628         if (p_ptr->publ.connected) {
 629                 u32 dport = port_peerport(p_ptr);
 630                 u32 destnode = port_peernode(p_ptr);
 631
 632                 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
 633                             tipc_zone(destnode), tipc_cluster(destnode),
 634                             tipc_node(destnode), dport);
 635                 if (p_ptr->publ.conn_type != 0)
 636                         tipc_printf(buf, " via {%u,%u}",
 637                                     p_ptr->publ.conn_type,
 638                                     p_ptr->publ.conn_instance);
 639         }
 640         else if (p_ptr->publ.published) {
 641                 tipc_printf(buf, " bound to");
 642                 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
 643                         if (publ->lower == publ->upper)
 644                                 tipc_printf(buf, " {%u,%u}", publ->type,
 645                                             publ->lower);
 646                         else
 647                                 tipc_printf(buf, " {%u,%u,%u}", publ->type,
 648                                             publ->lower, publ->upper);
 649                 }
 650         }
 651         tipc_printf(buf, "\n");
 652 }
 653
 654 #define MAX_PORT_QUERY 32768
 655
 656 struct sk_buff *tipc_port_get_ports(void)
 657 {
 658         struct sk_buff *buf;
 659         struct tlv_desc *rep_tlv;
 660         struct print_buf pb;
 661         struct port *p_ptr;
 662         int str_len;
 663
 664         buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
 665         if (!buf)
 666                 return NULL;
 667         rep_tlv = (struct tlv_desc *)buf->data;
 668
 669         tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
 670         spin_lock_bh(&tipc_port_list_lock);
 671         list_for_each_entry(p_ptr, &ports, port_list) {
 672                 spin_lock_bh(p_ptr->publ.lock);
 673                 port_print(p_ptr, &pb, 0);
 674                 spin_unlock_bh(p_ptr->publ.lock);
 675         }
 676         spin_unlock_bh(&tipc_port_list_lock);
 677         str_len = tipc_printbuf_validate(&pb);
 678
 679         skb_put(buf, TLV_SPACE(str_len));
 680         TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
 681
 682         return buf;
 683 }
 684
 685 void tipc_port_reinit(void)
 686 {
 687         struct port *p_ptr;
 688         struct tipc_msg *msg;
 689
 690         spin_lock_bh(&tipc_port_list_lock);
 691         list_for_each_entry(p_ptr, &ports, port_list) {
 692                 msg = &p_ptr->publ.phdr;
 693                 if (msg_orignode(msg) == tipc_own_addr)
 694                         break;
 695                 msg_set_prevnode(msg, tipc_own_addr);
 696                 msg_set_orignode(msg, tipc_own_addr);
 697         }
 698         spin_unlock_bh(&tipc_port_list_lock);
 699 }
 700
 701
 702 /*
 703  *  port_dispatcher_sigh(): Signal handler for messages destinated
 704  *                          to the tipc_port interface.
 705  */
 706
 707 static void port_dispatcher_sigh(void *dummy)
 708 {
 709         struct sk_buff *buf;
 710
 711         spin_lock_bh(&queue_lock);
 712         buf = msg_queue_head;
 713         msg_queue_head = NULL;
 714         spin_unlock_bh(&queue_lock);
 715
 716         while (buf) {
 717                 struct port *p_ptr;
 718                 struct user_port *up_ptr;
 719                 struct tipc_portid orig;
 720                 struct tipc_name_seq dseq;
 721                 void *usr_handle;
 722                 int connected;
 723                 int published;
 724                 u32 message_type;
 725
 726                 struct sk_buff *next = buf->next;
 727                 struct tipc_msg *msg = buf_msg(buf);
 728                 u32 dref = msg_destport(msg);
 729
 730                 message_type = msg_type(msg);
 731                 if (message_type > TIPC_DIRECT_MSG)
 732                         goto reject;    /* Unsupported message type */
 733
 734                 p_ptr = tipc_port_lock(dref);
 735                 if (!p_ptr)
 736                         goto reject;    /* Port deleted while msg in queue */
 737
 738                 orig.ref = msg_origport(msg);
 739                 orig.node = msg_orignode(msg);
 740                 up_ptr = p_ptr->user_port;
 741                 usr_handle = up_ptr->usr_handle;
 742                 connected = p_ptr->publ.connected;
 743                 published = p_ptr->publ.published;
 744
 745                 if (unlikely(msg_errcode(msg)))
 746                         goto err;
 747
 748                 switch (message_type) {
 749
 750                 case TIPC_CONN_MSG:{
 751                                 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
 752                                 u32 peer_port = port_peerport(p_ptr);
 753                                 u32 peer_node = port_peernode(p_ptr);
 754
 755                                 tipc_port_unlock(p_ptr);
 756                                 if (unlikely(!cb))
 757                                         goto reject;
 758                                 if (unlikely(!connected)) {
 759                                         if (tipc_connect2port(dref, &orig))
 760                                                 goto reject;
 761                                 } else if ((msg_origport(msg) != peer_port) ||
 762                                            (msg_orignode(msg) != peer_node))
 763                                         goto reject;
 764                                 if (unlikely(++p_ptr->publ.conn_unacked >=
 765                                              TIPC_FLOW_CONTROL_WIN))
 766                                         tipc_acknowledge(dref,
 767                                                          p_ptr->publ.conn_unacked);
 768                                 skb_pull(buf, msg_hdr_sz(msg));
 769                                 cb(usr_handle, dref, &buf, msg_data(msg),
 770                                    msg_data_sz(msg));
 771                                 break;
 772                         }
 773                 case TIPC_DIRECT_MSG:{
 774                                 tipc_msg_event cb = up_ptr->msg_cb;
 775
 776                                 tipc_port_unlock(p_ptr);
 777                                 if (unlikely(!cb || connected))
 778                                         goto reject;
 779                                 skb_pull(buf, msg_hdr_sz(msg));
 780                                 cb(usr_handle, dref, &buf, msg_data(msg),
 781                                    msg_data_sz(msg), msg_importance(msg),
 782                                    &orig);
 783                                 break;
 784                         }
 785                 case TIPC_MCAST_MSG:
 786                 case TIPC_NAMED_MSG:{
 787                                 tipc_named_msg_event cb = up_ptr->named_msg_cb;
 788
 789                                 tipc_port_unlock(p_ptr);
 790                                 if (unlikely(!cb || connected || !published))
 791                                         goto reject;
 792                                 dseq.type =  msg_nametype(msg);
 793                                 dseq.lower = msg_nameinst(msg);
 794                                 dseq.upper = (message_type == TIPC_NAMED_MSG)
 795                                         ? dseq.lower : msg_nameupper(msg);
 796                                 skb_pull(buf, msg_hdr_sz(msg));
 797                                 cb(usr_handle, dref, &buf, msg_data(msg),
 798                                    msg_data_sz(msg), msg_importance(msg),
 799                                    &orig, &dseq);
 800                                 break;
 801                         }
 802                 }
 803                 if (buf)
 804                         buf_discard(buf);
 805                 buf = next;
 806                 continue;
 807 err:
 808                 switch (message_type) {
 809
 810                 case TIPC_CONN_MSG:{
 811                                 tipc_conn_shutdown_event cb =
 812                                         up_ptr->conn_err_cb;
 813                                 u32 peer_port = port_peerport(p_ptr);
 814                                 u32 peer_node = port_peernode(p_ptr);
 815
 816                                 tipc_port_unlock(p_ptr);
 817                                 if (!cb || !connected)
 818                                         break;
 819                                 if ((msg_origport(msg) != peer_port) ||
 820                                     (msg_orignode(msg) != peer_node))
 821                                         break;
 822                                 tipc_disconnect(dref);
 823                                 skb_pull(buf, msg_hdr_sz(msg));
 824                                 cb(usr_handle, dref, &buf, msg_data(msg),
 825                                    msg_data_sz(msg), msg_errcode(msg));
 826                                 break;
 827                         }
 828                 case TIPC_DIRECT_MSG:{
 829                                 tipc_msg_err_event cb = up_ptr->err_cb;
 830
 831                                 tipc_port_unlock(p_ptr);
 832                                 if (!cb || connected)
 833                                         break;
 834                                 skb_pull(buf, msg_hdr_sz(msg));
 835                                 cb(usr_handle, dref, &buf, msg_data(msg),
 836                                    msg_data_sz(msg), msg_errcode(msg), &orig);
 837                                 break;
 838                         }
 839                 case TIPC_MCAST_MSG:
 840                 case TIPC_NAMED_MSG:{
 841                                 tipc_named_msg_err_event cb =
 842                                         up_ptr->named_err_cb;
 843
 844                                 tipc_port_unlock(p_ptr);
 845                                 if (!cb || connected)
 846                                         break;
 847                                 dseq.type =  msg_nametype(msg);
 848                                 dseq.lower = msg_nameinst(msg);
 849                                 dseq.upper = (message_type == TIPC_NAMED_MSG)
 850                                         ? dseq.lower : msg_nameupper(msg);
 851                                 skb_pull(buf, msg_hdr_sz(msg));
 852                                 cb(usr_handle, dref, &buf, msg_data(msg),
 853                                    msg_data_sz(msg), msg_errcode(msg), &dseq);
 854                                 break;
 855                         }
 856                 }
 857                 if (buf)
 858                         buf_discard(buf);
 859                 buf = next;
 860                 continue;
 861 reject:
 862                 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
 863                 buf = next;
 864         }
 865 }
 866
 867 /*
 868  *  port_dispatcher(): Dispatcher for messages destinated
 869  *  to the tipc_port interface. Called with port locked.
 870  */
 871
 872 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
 873 {
 874         buf->next = NULL;
 875         spin_lock_bh(&queue_lock);
 876         if (msg_queue_head) {
 877                 msg_queue_tail->next = buf;
 878                 msg_queue_tail = buf;
 879         } else {
 880                 msg_queue_tail = msg_queue_head = buf;
 881                 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
 882         }
 883         spin_unlock_bh(&queue_lock);
 884         return 0;
 885 }
 886
 887 /*
 888  * Wake up port after congestion: Called with port locked,
 889  *
 890  */
 891
 892 static void port_wakeup_sh(unsigned long ref)
 893 {
 894         struct port *p_ptr;
 895         struct user_port *up_ptr;
 896         tipc_continue_event cb = NULL;
 897         void *uh = NULL;
 898
 899         p_ptr = tipc_port_lock(ref);
 900         if (p_ptr) {
 901                 up_ptr = p_ptr->user_port;
 902                 if (up_ptr) {
 903                         cb = up_ptr->continue_event_cb;
 904                         uh = up_ptr->usr_handle;
 905                 }
 906                 tipc_port_unlock(p_ptr);
 907         }
 908         if (cb)
 909                 cb(uh, ref);
 910 }
 911
 912
 913 static void port_wakeup(struct tipc_port *p_ptr)
 914 {
 915         tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
 916 }
 917
 918 void tipc_acknowledge(u32 ref, u32 ack)
 919 {
 920         struct port *p_ptr;
 921         struct sk_buff *buf = NULL;
 922
 923         p_ptr = tipc_port_lock(ref);
 924         if (!p_ptr)
 925                 return;
 926         if (p_ptr->publ.connected) {
 927                 p_ptr->publ.conn_unacked -= ack;
 928                 buf = port_build_proto_msg(port_peerport(p_ptr),
 929                                            port_peernode(p_ptr),
 930                                            ref,
 931                                            tipc_own_addr,
 932                                            CONN_MANAGER,
 933                                            CONN_ACK,
 934                                            TIPC_OK,
 935                                            port_out_seqno(p_ptr),
 936                                            ack);
 937         }
 938         tipc_port_unlock(p_ptr);
 939         tipc_net_route_msg(buf);
 940 }
 941
 942 /*
 943  * tipc_createport(): user level call. Will add port to
 944  *                    registry if non-zero user_ref.
 945  */
 946
 947 int tipc_createport(u32 user_ref,
 948                     void *usr_handle,
 949                     unsigned int importance,
 950                     tipc_msg_err_event error_cb,
 951                     tipc_named_msg_err_event named_error_cb,
 952                     tipc_conn_shutdown_event conn_error_cb,
 953                     tipc_msg_event msg_cb,
 954                     tipc_named_msg_event named_msg_cb,
 955                     tipc_conn_msg_event conn_msg_cb,
 956                     tipc_continue_event continue_event_cb,/* May be zero */
 957                     u32 *portref)
 958 {
 959         struct user_port *up_ptr;
 960         struct port *p_ptr;
 961
 962         up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
 963         if (!up_ptr) {
 964                 warn("Port creation failed, no memory\n");
 965                 return -ENOMEM;
 966         }
 967         p_ptr = (struct port *)tipc_createport_raw(NULL, port_dispatcher,
 968                                                    port_wakeup, importance);
 969         if (!p_ptr) {
 970                 kfree(up_ptr);
 971                 return -ENOMEM;
 972         }
 973
 974         p_ptr->user_port = up_ptr;
 975         up_ptr->user_ref = user_ref;
 976         up_ptr->usr_handle = usr_handle;
 977         up_ptr->ref = p_ptr->publ.ref;
 978         up_ptr->err_cb = error_cb;
 979         up_ptr->named_err_cb = named_error_cb;
 980         up_ptr->conn_err_cb = conn_error_cb;
 981         up_ptr->msg_cb = msg_cb;
 982         up_ptr->named_msg_cb = named_msg_cb;
 983         up_ptr->conn_msg_cb = conn_msg_cb;
 984         up_ptr->continue_event_cb = continue_event_cb;
 985         INIT_LIST_HEAD(&up_ptr->uport_list);
 986         tipc_reg_add_port(up_ptr);
 987         *portref = p_ptr->publ.ref;
 988         tipc_port_unlock(p_ptr);
 989         return 0;
 990 }
 991
 992 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
 993 {
 994         id->ref = ref;
 995         id->node = tipc_own_addr;
 996         return 0;
 997 }
 998
 999 int tipc_portimportance(u32 ref, unsigned int *importance)
1000 {
1001         struct port *p_ptr;
1002
1003         p_ptr = tipc_port_lock(ref);
1004         if (!p_ptr)
1005                 return -EINVAL;
1006         *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1007         tipc_port_unlock(p_ptr);
1008         return 0;
1009 }
1010
1011 int tipc_set_portimportance(u32 ref, unsigned int imp)
1012 {
1013         struct port *p_ptr;
1014
1015         if (imp > TIPC_CRITICAL_IMPORTANCE)
1016                 return -EINVAL;
1017
1018         p_ptr = tipc_port_lock(ref);
1019         if (!p_ptr)
1020                 return -EINVAL;
1021         msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1022         tipc_port_unlock(p_ptr);
1023         return 0;
1024 }
1025
1026
1027 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1028 {
1029         struct port *p_ptr;
1030         struct publication *publ;
1031         u32 key;
1032         int res = -EINVAL;
1033
1034         p_ptr = tipc_port_lock(ref);
1035         if (!p_ptr)
1036                 return -EINVAL;
1037
1038         dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1039             "lower = %u, upper = %u\n",
1040             ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1041         if (p_ptr->publ.connected)
1042                 goto exit;
1043         if (seq->lower > seq->upper)
1044                 goto exit;
1045         if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1046                 goto exit;
1047         key = ref + p_ptr->pub_count + 1;
1048         if (key == ref) {
1049                 res = -EADDRINUSE;
1050                 goto exit;
1051         }
1052         publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1053                                     scope, p_ptr->publ.ref, key);
1054         if (publ) {
1055                 list_add(&publ->pport_list, &p_ptr->publications);
1056                 p_ptr->pub_count++;
1057                 p_ptr->publ.published = 1;
1058                 res = 0;
1059         }
1060 exit:
1061         tipc_port_unlock(p_ptr);
1062         return res;
1063 }
1064
1065 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1066 {
1067         struct port *p_ptr;
1068         struct publication *publ;
1069         struct publication *tpubl;
1070         int res = -EINVAL;
1071
1072         p_ptr = tipc_port_lock(ref);
1073         if (!p_ptr)
1074                 return -EINVAL;
1075         if (!seq) {
1076                 list_for_each_entry_safe(publ, tpubl,
1077                                          &p_ptr->publications, pport_list) {
1078                         tipc_nametbl_withdraw(publ->type, publ->lower,
1079                                               publ->ref, publ->key);
1080                 }
1081                 res = 0;
1082         } else {
1083                 list_for_each_entry_safe(publ, tpubl,
1084                                          &p_ptr->publications, pport_list) {
1085                         if (publ->scope != scope)
1086                                 continue;
1087                         if (publ->type != seq->type)
1088                                 continue;
1089                         if (publ->lower != seq->lower)
1090                                 continue;
1091                         if (publ->upper != seq->upper)
1092                                 break;
1093                         tipc_nametbl_withdraw(publ->type, publ->lower,
1094                                               publ->ref, publ->key);
1095                         res = 0;
1096                         break;
1097                 }
1098         }
1099         if (list_empty(&p_ptr->publications))
1100                 p_ptr->publ.published = 0;
1101         tipc_port_unlock(p_ptr);
1102         return res;
1103 }
1104
1105 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1106 {
1107         struct port *p_ptr;
1108         struct tipc_msg *msg;
1109         int res = -EINVAL;
1110
1111         p_ptr = tipc_port_lock(ref);
1112         if (!p_ptr)
1113                 return -EINVAL;
1114         if (p_ptr->publ.published || p_ptr->publ.connected)
1115                 goto exit;
1116         if (!peer->ref)
1117                 goto exit;
1118
1119         msg = &p_ptr->publ.phdr;
1120         msg_set_destnode(msg, peer->node);
1121         msg_set_destport(msg, peer->ref);
1122         msg_set_orignode(msg, tipc_own_addr);
1123         msg_set_origport(msg, p_ptr->publ.ref);
1124         msg_set_transp_seqno(msg, 42);
1125         msg_set_type(msg, TIPC_CONN_MSG);
1126         if (!may_route(peer->node))
1127                 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1128         else
1129                 msg_set_hdr_sz(msg, LONG_H_SIZE);
1130
1131         p_ptr->probing_interval = PROBING_INTERVAL;
1132         p_ptr->probing_state = CONFIRMED;
1133         p_ptr->publ.connected = 1;
1134         k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1135
1136         tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1137                           (void *)(unsigned long)ref,
1138                           (net_ev_handler)port_handle_node_down);
1139         res = 0;
1140 exit:
1141         tipc_port_unlock(p_ptr);
1142         p_ptr->publ.max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1143         return res;
1144 }
1145
1146 /**
1147  * tipc_disconnect_port - disconnect port from peer
1148  *
1149  * Port must be locked.
1150  */
1151
1152 int tipc_disconnect_port(struct tipc_port *tp_ptr)
1153 {
1154         int res;
1155
1156         if (tp_ptr->connected) {
1157                 tp_ptr->connected = 0;
1158                 /* let timer expire on it's own to avoid deadlock! */
1159                 tipc_nodesub_unsubscribe(
1160                         &((struct port *)tp_ptr)->subscription);
1161                 res = 0;
1162         } else {
1163                 res = -ENOTCONN;
1164         }
1165         return res;
1166 }
1167
1168 /*
1169  * tipc_disconnect(): Disconnect port form peer.
1170  *                    This is a node local operation.
1171  */
1172
1173 int tipc_disconnect(u32 ref)
1174 {
1175         struct port *p_ptr;
1176         int res;
1177
1178         p_ptr = tipc_port_lock(ref);
1179         if (!p_ptr)
1180                 return -EINVAL;
1181         res = tipc_disconnect_port((struct tipc_port *)p_ptr);
1182         tipc_port_unlock(p_ptr);
1183         return res;
1184 }
1185
1186 /*
1187  * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1188  */
1189 int tipc_shutdown(u32 ref)
1190 {
1191         struct port *p_ptr;
1192         struct sk_buff *buf = NULL;
1193
1194         p_ptr = tipc_port_lock(ref);
1195         if (!p_ptr)
1196                 return -EINVAL;
1197
1198         if (p_ptr->publ.connected) {
1199                 u32 imp = msg_importance(&p_ptr->publ.phdr);
1200                 if (imp < TIPC_CRITICAL_IMPORTANCE)
1201                         imp++;
1202                 buf = port_build_proto_msg(port_peerport(p_ptr),
1203                                            port_peernode(p_ptr),
1204                                            ref,
1205                                            tipc_own_addr,
1206                                            imp,
1207                                            TIPC_CONN_MSG,
1208                                            TIPC_CONN_SHUTDOWN,
1209                                            port_out_seqno(p_ptr),
1210                                            0);
1211         }
1212         tipc_port_unlock(p_ptr);
1213         tipc_net_route_msg(buf);
1214         return tipc_disconnect(ref);
1215 }
1216
1217 /*
1218  *  tipc_port_recv_sections(): Concatenate and deliver sectioned
1219  *                        message for this node.
1220  */
1221
1222 static int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1223                                    struct iovec const *msg_sect)
1224 {
1225         struct sk_buff *buf;
1226         int res;
1227
1228         res = tipc_msg_build(&sender->publ.phdr, msg_sect, num_sect,
1229                         MAX_MSG_SIZE, !sender->user_port, &buf);
1230         if (likely(buf))
1231                 tipc_port_recv_msg(buf);
1232         return res;
1233 }
1234
1235 /**
1236  * tipc_send - send message sections on connection
1237  */
1238
1239 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1240 {
1241         struct port *p_ptr;
1242         u32 destnode;
1243         int res;
1244
1245         p_ptr = tipc_port_deref(ref);
1246         if (!p_ptr || !p_ptr->publ.connected)
1247                 return -EINVAL;
1248
1249         p_ptr->publ.congested = 1;
1250         if (!tipc_port_congested(p_ptr)) {
1251                 destnode = port_peernode(p_ptr);
1252                 if (likely(destnode != tipc_own_addr))
1253                         res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1254                                                            destnode);
1255                 else
1256                         res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1257
1258                 if (likely(res != -ELINKCONG)) {
1259                         port_incr_out_seqno(p_ptr);
1260                         p_ptr->publ.congested = 0;
1261                         p_ptr->sent++;
1262                         return res;
1263                 }
1264         }
1265         if (port_unreliable(p_ptr)) {
1266                 p_ptr->publ.congested = 0;
1267                 /* Just calculate msg length and return */
1268                 return tipc_msg_calc_data_size(msg_sect, num_sect);
1269         }
1270         return -ELINKCONG;
1271 }
1272
1273 /**
1274  * tipc_forward2name - forward message sections to port name
1275  */
1276
1277 static int tipc_forward2name(u32 ref,
1278                              struct tipc_name const *name,
1279                              u32 domain,
1280                              u32 num_sect,
1281                              struct iovec const *msg_sect,
1282                              struct tipc_portid const *orig,
1283                              unsigned int importance)
1284 {
1285         struct port *p_ptr;
1286         struct tipc_msg *msg;
1287         u32 destnode = domain;
1288         u32 destport;
1289         int res;
1290
1291         p_ptr = tipc_port_deref(ref);
1292         if (!p_ptr || p_ptr->publ.connected)
1293                 return -EINVAL;
1294
1295         msg = &p_ptr->publ.phdr;
1296         msg_set_type(msg, TIPC_NAMED_MSG);
1297         msg_set_orignode(msg, orig->node);
1298         msg_set_origport(msg, orig->ref);
1299         msg_set_hdr_sz(msg, LONG_H_SIZE);
1300         msg_set_nametype(msg, name->type);
1301         msg_set_nameinst(msg, name->instance);
1302         msg_set_lookup_scope(msg, tipc_addr_scope(domain));
1303         if (importance <= TIPC_CRITICAL_IMPORTANCE)
1304                 msg_set_importance(msg,importance);
1305         destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1306         msg_set_destnode(msg, destnode);
1307         msg_set_destport(msg, destport);
1308
1309         if (likely(destport)) {
1310                 p_ptr->sent++;
1311                 if (likely(destnode == tipc_own_addr))
1312                         return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1313                 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1314                                                    destnode);
1315                 if (likely(res != -ELINKCONG))
1316                         return res;
1317                 if (port_unreliable(p_ptr)) {
1318                         /* Just calculate msg length and return */
1319                         return tipc_msg_calc_data_size(msg_sect, num_sect);
1320                 }
1321                 return -ELINKCONG;
1322         }
1323         return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1324                                          TIPC_ERR_NO_NAME);
1325 }
1326
1327 /**
1328  * tipc_send2name - send message sections to port name
1329  */
1330
1331 int tipc_send2name(u32 ref,
1332                    struct tipc_name const *name,
1333                    unsigned int domain,
1334                    unsigned int num_sect,
1335                    struct iovec const *msg_sect)
1336 {
1337         struct tipc_portid orig;
1338
1339         orig.ref = ref;
1340         orig.node = tipc_own_addr;
1341         return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1342                                  TIPC_PORT_IMPORTANCE);
1343 }
1344
1345 /**
1346  * tipc_forward2port - forward message sections to port identity
1347  */
1348
1349 static int tipc_forward2port(u32 ref,
1350                              struct tipc_portid const *dest,
1351                              unsigned int num_sect,
1352                              struct iovec const *msg_sect,
1353                              struct tipc_portid const *orig,
1354                              unsigned int importance)
1355 {
1356         struct port *p_ptr;
1357         struct tipc_msg *msg;
1358         int res;
1359
1360         p_ptr = tipc_port_deref(ref);
1361         if (!p_ptr || p_ptr->publ.connected)
1362                 return -EINVAL;
1363
1364         msg = &p_ptr->publ.phdr;
1365         msg_set_type(msg, TIPC_DIRECT_MSG);
1366         msg_set_orignode(msg, orig->node);
1367         msg_set_origport(msg, orig->ref);
1368         msg_set_destnode(msg, dest->node);
1369         msg_set_destport(msg, dest->ref);
1370         msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1371         if (importance <= TIPC_CRITICAL_IMPORTANCE)
1372                 msg_set_importance(msg, importance);
1373         p_ptr->sent++;
1374         if (dest->node == tipc_own_addr)
1375                 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1376         res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1377         if (likely(res != -ELINKCONG))
1378                 return res;
1379         if (port_unreliable(p_ptr)) {
1380                 /* Just calculate msg length and return */
1381                 return tipc_msg_calc_data_size(msg_sect, num_sect);
1382         }
1383         return -ELINKCONG;
1384 }
1385
1386 /**
1387  * tipc_send2port - send message sections to port identity
1388  */
1389
1390 int tipc_send2port(u32 ref,
1391                    struct tipc_portid const *dest,
1392                    unsigned int num_sect,
1393                    struct iovec const *msg_sect)
1394 {
1395         struct tipc_portid orig;
1396
1397         orig.ref = ref;
1398         orig.node = tipc_own_addr;
1399         return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1400                                  TIPC_PORT_IMPORTANCE);
1401 }
1402
1403 /**
1404  * tipc_forward_buf2port - forward message buffer to port identity
1405  */
1406 static int tipc_forward_buf2port(u32 ref,
1407                                  struct tipc_portid const *dest,
1408                                  struct sk_buff *buf,
1409                                  unsigned int dsz,
1410                                  struct tipc_portid const *orig,
1411                                  unsigned int importance)
1412 {
1413         struct port *p_ptr;
1414         struct tipc_msg *msg;
1415         int res;
1416
1417         p_ptr = (struct port *)tipc_ref_deref(ref);
1418         if (!p_ptr || p_ptr->publ.connected)
1419                 return -EINVAL;
1420
1421         msg = &p_ptr->publ.phdr;
1422         msg_set_type(msg, TIPC_DIRECT_MSG);
1423         msg_set_orignode(msg, orig->node);
1424         msg_set_origport(msg, orig->ref);
1425         msg_set_destnode(msg, dest->node);
1426         msg_set_destport(msg, dest->ref);
1427         msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1428         if (importance <= TIPC_CRITICAL_IMPORTANCE)
1429                 msg_set_importance(msg, importance);
1430         msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1431         if (skb_cow(buf, DIR_MSG_H_SIZE))
1432                 return -ENOMEM;
1433
1434         skb_push(buf, DIR_MSG_H_SIZE);
1435         skb_copy_to_linear_data(buf, msg, DIR_MSG_H_SIZE);
1436         msg_dbg(msg, "buf2port: ");
1437         p_ptr->sent++;
1438         if (dest->node == tipc_own_addr)
1439                 return tipc_port_recv_msg(buf);
1440         res = tipc_send_buf_fast(buf, dest->node);
1441         if (likely(res != -ELINKCONG))
1442                 return res;
1443         if (port_unreliable(p_ptr))
1444                 return dsz;
1445         return -ELINKCONG;
1446 }
1447
1448 /**
1449  * tipc_send_buf2port - send message buffer to port identity
1450  */
1451
1452 int tipc_send_buf2port(u32 ref,
1453                        struct tipc_portid const *dest,
1454                        struct sk_buff *buf,
1455                        unsigned int dsz)
1456 {
1457         struct tipc_portid orig;
1458
1459         orig.ref = ref;
1460         orig.node = tipc_own_addr;
1461         return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1462                                      TIPC_PORT_IMPORTANCE);
1463 }
1464