lnet/lnet/lib-msg.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lnet/lnet/lib-msg.c
  37  *
  38  * Message decoding, parsing and finalizing routines
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_LNET
  42
  43 #include <lnet/lib-lnet.h>
  44
  45 void
  46 lnet_build_unlink_event (lnet_libmd_t *md, lnet_event_t *ev)
  47 {
  48         ENTRY;
  49
  50         memset(ev, 0, sizeof(*ev));
  51
  52         ev->status   = 0;
  53         ev->unlinked = 1;
  54         ev->type     = LNET_EVENT_UNLINK;
  55         lnet_md_deconstruct(md, &ev->md);
  56         lnet_md2handle(&ev->md_handle, md);
  57         EXIT;
  58 }
  59
  60 /*
  61  * Don't need any lock, must be called after lnet_commit_md
  62  */
  63 void
  64 lnet_build_msg_event(lnet_msg_t *msg, lnet_event_kind_t ev_type)
  65 {
  66         lnet_hdr_t      *hdr = &msg->msg_hdr;
  67         lnet_event_t    *ev  = &msg->msg_ev;
  68
  69         LASSERT(!msg->msg_routing);
  70
  71         ev->type = ev_type;
  72
  73         if (ev_type == LNET_EVENT_SEND) {
  74                 /* event for active message */
  75                 ev->target.nid    = le64_to_cpu(hdr->dest_nid);
  76                 ev->target.pid    = le32_to_cpu(hdr->dest_pid);
  77                 ev->initiator.nid = LNET_NID_ANY;
  78                 ev->initiator.pid = the_lnet.ln_pid;
  79                 ev->sender        = LNET_NID_ANY;
  80
  81         } else {
  82                 /* event for passive message */
  83                 ev->target.pid    = hdr->dest_pid;
  84                 ev->target.nid    = hdr->dest_nid;
  85                 ev->initiator.pid = hdr->src_pid;
  86                 ev->initiator.nid = hdr->src_nid;
  87                 ev->rlength       = hdr->payload_length;
  88                 ev->sender        = msg->msg_from;
  89                 ev->mlength       = msg->msg_wanted;
  90                 ev->offset        = msg->msg_offset;
  91         }
  92
  93         switch (ev_type) {
  94         default:
  95                 LBUG();
  96
  97         case LNET_EVENT_PUT: /* passive PUT */
  98                 ev->pt_index   = hdr->msg.put.ptl_index;
  99                 ev->match_bits = hdr->msg.put.match_bits;
 100                 ev->hdr_data   = hdr->msg.put.hdr_data;
 101                 return;
 102
 103         case LNET_EVENT_GET: /* passive GET */
 104                 ev->pt_index   = hdr->msg.get.ptl_index;
 105                 ev->match_bits = hdr->msg.get.match_bits;
 106                 ev->hdr_data   = 0;
 107                 return;
 108
 109         case LNET_EVENT_ACK: /* ACK */
 110                 ev->match_bits = hdr->msg.ack.match_bits;
 111                 ev->mlength    = hdr->msg.ack.mlength;
 112                 return;
 113
 114         case LNET_EVENT_REPLY: /* REPLY */
 115                 return;
 116
 117         case LNET_EVENT_SEND: /* active message */
 118                 if (msg->msg_type == LNET_MSG_PUT) {
 119                         ev->pt_index   = le32_to_cpu(hdr->msg.put.ptl_index);
 120                         ev->match_bits = le64_to_cpu(hdr->msg.put.match_bits);
 121                         ev->offset     = le32_to_cpu(hdr->msg.put.offset);
 122                         ev->mlength    =
 123                         ev->rlength    = le32_to_cpu(hdr->payload_length);
 124                         ev->hdr_data   = le64_to_cpu(hdr->msg.put.hdr_data);
 125
 126                 } else {
 127                         LASSERT(msg->msg_type == LNET_MSG_GET);
 128                         ev->pt_index   = le32_to_cpu(hdr->msg.get.ptl_index);
 129                         ev->match_bits = le64_to_cpu(hdr->msg.get.match_bits);
 130                         ev->mlength    =
 131                         ev->rlength    = le32_to_cpu(hdr->msg.get.sink_length);
 132                         ev->offset     = le32_to_cpu(hdr->msg.get.src_offset);
 133                         ev->hdr_data   = 0;
 134                 }
 135                 return;
 136         }
 137 }
 138
 139 void
 140 lnet_msg_commit(lnet_msg_t *msg, int cpt)
 141 {
 142         struct lnet_msg_container *container = the_lnet.ln_msg_containers[cpt];
 143         lnet_counters_t           *counters  = the_lnet.ln_counters[cpt];
 144
 145         /* routed message can be committed for both receiving and sending */
 146         LASSERT(!msg->msg_tx_committed);
 147
 148         if (msg->msg_sending) {
 149                 LASSERT(!msg->msg_receiving);
 150
 151                 msg->msg_tx_cpt = cpt;
 152                 msg->msg_tx_committed = 1;
 153                 if (msg->msg_rx_committed) { /* routed message REPLY */
 154                         LASSERT(msg->msg_onactivelist);
 155                         return;
 156                 }
 157         } else {
 158                 LASSERT(!msg->msg_sending);
 159                 msg->msg_rx_cpt = cpt;
 160                 msg->msg_rx_committed = 1;
 161         }
 162
 163         LASSERT(!msg->msg_onactivelist);
 164         msg->msg_onactivelist = 1;
 165         list_add(&msg->msg_activelist, &container->msc_active);
 166
 167         counters->msgs_alloc++;
 168         if (counters->msgs_alloc > counters->msgs_max)
 169                 counters->msgs_max = counters->msgs_alloc;
 170 }
 171
 172 static void
 173 lnet_msg_decommit_tx(lnet_msg_t *msg, int status)
 174 {
 175         lnet_counters_t *counters;
 176         lnet_event_t    *ev = &msg->msg_ev;
 177
 178         LASSERT(msg->msg_tx_committed);
 179         if (status != 0)
 180                 goto out;
 181
 182         counters = the_lnet.ln_counters[msg->msg_tx_cpt];
 183         switch (ev->type) {
 184         default: /* routed message */
 185                 LASSERT(msg->msg_routing);
 186                 LASSERT(msg->msg_rx_committed);
 187                 LASSERT(ev->type == 0);
 188
 189                 counters->route_length += msg->msg_len;
 190                 counters->route_count++;
 191                 goto out;
 192
 193         case LNET_EVENT_PUT:
 194                 /* should have been decommitted */
 195                 LASSERT(!msg->msg_rx_committed);
 196                 /* overwritten while sending ACK */
 197                 LASSERT(msg->msg_type == LNET_MSG_ACK);
 198                 msg->msg_type = LNET_MSG_PUT; /* fix type */
 199                 break;
 200
 201         case LNET_EVENT_SEND:
 202                 LASSERT(!msg->msg_rx_committed);
 203                 if (msg->msg_type == LNET_MSG_PUT)
 204                         counters->send_length += msg->msg_len;
 205                 break;
 206
 207         case LNET_EVENT_GET:
 208                 LASSERT(msg->msg_rx_committed);
 209                 /* overwritten while sending reply, we should never be
 210                  * here for optimized GET */
 211                 LASSERT(msg->msg_type == LNET_MSG_REPLY);
 212                 msg->msg_type = LNET_MSG_GET; /* fix type */
 213                 break;
 214         }
 215
 216         counters->send_count++;
 217  out:
 218         lnet_return_tx_credits_locked(msg);
 219         msg->msg_tx_committed = 0;
 220 }
 221
 222 static void
 223 lnet_msg_decommit_rx(lnet_msg_t *msg, int status)
 224 {
 225         lnet_counters_t *counters;
 226         lnet_event_t    *ev = &msg->msg_ev;
 227
 228         LASSERT(!msg->msg_tx_committed); /* decommitted or never committed */
 229         LASSERT(msg->msg_rx_committed);
 230
 231         if (status != 0)
 232                 goto out;
 233
 234         counters = the_lnet.ln_counters[msg->msg_rx_cpt];
 235         switch (ev->type) {
 236         default:
 237                 LASSERT(ev->type == 0);
 238                 LASSERT(msg->msg_routing);
 239                 goto out;
 240
 241         case LNET_EVENT_ACK:
 242                 LASSERT(msg->msg_type == LNET_MSG_ACK);
 243                 break;
 244
 245         case LNET_EVENT_GET:
 246                 /* type is "REPLY" if it's an optimized GET on passive side,
 247                  * because optimized GET will never be committed for sending,
 248                  * so message type wouldn't be changed back to "GET" by
 249                  * lnet_msg_decommit_tx(), see details in lnet_parse_get() */
 250                 LASSERT(msg->msg_type == LNET_MSG_REPLY ||
 251                         msg->msg_type == LNET_MSG_GET);
 252                 counters->send_length += msg->msg_wanted;
 253                 break;
 254
 255         case LNET_EVENT_PUT:
 256                 LASSERT(msg->msg_type == LNET_MSG_PUT);
 257                 break;
 258
 259         case LNET_EVENT_REPLY:
 260                 /* type is "GET" if it's an optimized GET on active side,
 261                  * see details in lnet_create_reply_msg() */
 262                 LASSERT(msg->msg_type == LNET_MSG_GET ||
 263                         msg->msg_type == LNET_MSG_REPLY);
 264                 break;
 265         }
 266
 267         counters->recv_count++;
 268         if (ev->type == LNET_EVENT_PUT || ev->type == LNET_EVENT_REPLY)
 269                 counters->recv_length += msg->msg_wanted;
 270
 271  out:
 272         lnet_return_rx_credits_locked(msg);
 273         msg->msg_rx_committed = 0;
 274 }
 275
 276 void
 277 lnet_msg_decommit(lnet_msg_t *msg, int cpt, int status)
 278 {
 279         int     cpt2 = cpt;
 280
 281         LASSERT(msg->msg_tx_committed || msg->msg_rx_committed);
 282         LASSERT(msg->msg_onactivelist);
 283
 284         if (msg->msg_tx_committed) { /* always decommit for sending first */
 285                 LASSERT(cpt == msg->msg_tx_cpt);
 286                 lnet_msg_decommit_tx(msg, status);
 287         }
 288
 289         if (msg->msg_rx_committed) {
 290                 /* forwarding msg committed for both receiving and sending */
 291                 if (cpt != msg->msg_rx_cpt) {
 292                         lnet_net_unlock(cpt);
 293                         cpt2 = msg->msg_rx_cpt;
 294                         lnet_net_lock(cpt2);
 295                 }
 296                 lnet_msg_decommit_rx(msg, status);
 297         }
 298
 299         list_del(&msg->msg_activelist);
 300         msg->msg_onactivelist = 0;
 301
 302         the_lnet.ln_counters[cpt2]->msgs_alloc--;
 303
 304         if (cpt2 != cpt) {
 305                 lnet_net_unlock(cpt2);
 306                 lnet_net_lock(cpt);
 307         }
 308 }
 309
 310 void
 311 lnet_msg_attach_md(lnet_msg_t *msg, lnet_libmd_t *md,
 312                    unsigned int offset, unsigned int mlen)
 313 {
 314         /* NB: @offset and @len are only useful for receiving */
 315         /* Here, we attach the MD on lnet_msg and mark it busy and
 316          * decrementing its threshold. Come what may, the lnet_msg "owns"
 317          * the MD until a call to lnet_msg_detach_md or lnet_finalize()
 318          * signals completion. */
 319         LASSERT(!msg->msg_routing);
 320
 321         msg->msg_md = md;
 322         if (msg->msg_receiving) { /* committed for receiving */
 323                 msg->msg_offset = offset;
 324                 msg->msg_wanted = mlen;
 325         }
 326
 327         md->md_refcount++;
 328         if (md->md_threshold != LNET_MD_THRESH_INF) {
 329                 LASSERT(md->md_threshold > 0);
 330                 md->md_threshold--;
 331         }
 332
 333         /* build umd in event */
 334         lnet_md2handle(&msg->msg_ev.md_handle, md);
 335         lnet_md_deconstruct(md, &msg->msg_ev.md);
 336 }
 337
 338 void
 339 lnet_msg_detach_md(lnet_msg_t *msg, int status)
 340 {
 341         lnet_libmd_t    *md = msg->msg_md;
 342         int             unlink;
 343
 344         /* Now it's safe to drop my caller's ref */
 345         md->md_refcount--;
 346         LASSERT(md->md_refcount >= 0);
 347
 348         unlink = lnet_md_unlinkable(md);
 349         if (md->md_eq != NULL) {
 350                 msg->msg_ev.status   = status;
 351                 msg->msg_ev.unlinked = unlink;
 352                 lnet_eq_enqueue_event(md->md_eq, &msg->msg_ev);
 353         }
 354
 355         if (unlink)
 356                 lnet_md_unlink(md);
 357
 358         msg->msg_md = NULL;
 359 }
 360
 361 static int
 362 lnet_complete_msg_locked(lnet_msg_t *msg, int cpt)
 363 {
 364         lnet_handle_wire_t ack_wmd;
 365         int                rc;
 366         int                status = msg->msg_ev.status;
 367
 368         LASSERT (msg->msg_onactivelist);
 369
 370         if (status == 0 && msg->msg_ack) {
 371                 /* Only send an ACK if the PUT completed successfully */
 372
 373                 lnet_msg_decommit(msg, cpt, 0);
 374
 375                 msg->msg_ack = 0;
 376                 lnet_net_unlock(cpt);
 377
 378                 LASSERT(msg->msg_ev.type == LNET_EVENT_PUT);
 379                 LASSERT(!msg->msg_routing);
 380
 381                 ack_wmd = msg->msg_hdr.msg.put.ack_wmd;
 382
 383                 lnet_prep_send(msg, LNET_MSG_ACK, msg->msg_ev.initiator, 0, 0);
 384
 385                 msg->msg_hdr.msg.ack.dst_wmd = ack_wmd;
 386                 msg->msg_hdr.msg.ack.match_bits = msg->msg_ev.match_bits;
 387                 msg->msg_hdr.msg.ack.mlength = cpu_to_le32(msg->msg_ev.mlength);
 388
 389                 /* NB: we probably want to use NID of msg::msg_from as 3rd
 390                  * parameter (router NID) if it's routed message */
 391                 rc = lnet_send(msg->msg_ev.target.nid, msg, LNET_NID_ANY);
 392
 393                 lnet_net_lock(cpt);
 394                 /*
 395                  * NB: message is committed for sending, we should return
 396                  * on success because LND will finalize this message later.
 397                  *
 398                  * Also, there is possibility that message is committed for
 399                  * sending and also failed before delivering to LND,
 400                  * i.e: ENOMEM, in that case we can't fall through either
 401                  * because CPT for sending can be different with CPT for
 402                  * receiving, so we should return back to lnet_finalize()
 403                  * to make sure we are locking the correct partition.
 404                  */
 405                 return rc;
 406
 407         } else if (status == 0 &&       /* OK so far */
 408                    (msg->msg_routing && !msg->msg_sending)) {
 409                 /* not forwarded */
 410                 LASSERT(!msg->msg_receiving);   /* called back recv already */
 411                 lnet_net_unlock(cpt);
 412
 413                 rc = lnet_send(LNET_NID_ANY, msg, LNET_NID_ANY);
 414
 415                 lnet_net_lock(cpt);
 416                 /*
 417                  * NB: message is committed for sending, we should return
 418                  * on success because LND will finalize this message later.
 419                  *
 420                  * Also, there is possibility that message is committed for
 421                  * sending and also failed before delivering to LND,
 422                  * i.e: ENOMEM, in that case we can't fall through either:
 423                  * - The rule is message must decommit for sending first if
 424                  *   the it's committed for both sending and receiving
 425                  * - CPT for sending can be different with CPT for receiving,
 426                  *   so we should return back to lnet_finalize() to make
 427                  *   sure we are locking the correct partition.
 428                  */
 429                 return rc;
 430         }
 431
 432         lnet_msg_decommit(msg, cpt, status);
 433         lnet_msg_free_locked(msg);
 434         return 0;
 435 }
 436
 437 void
 438 lnet_finalize (lnet_ni_t *ni, lnet_msg_t *msg, int status)
 439 {
 440         struct lnet_msg_container       *container;
 441         int                             my_slot;
 442         int                             cpt;
 443         int                             rc;
 444         int                             i;
 445
 446         LASSERT (!in_interrupt ());
 447
 448         if (msg == NULL)
 449                 return;
 450 #if 0
 451         CDEBUG(D_WARNING, "%s msg->%s Flags:%s%s%s%s%s%s%s%s%s%s%s txp %s rxp %s\n",
 452                lnet_msgtyp2str(msg->msg_type), libcfs_id2str(msg->msg_target),
 453                msg->msg_target_is_router ? "t" : "",
 454                msg->msg_routing ? "X" : "",
 455                msg->msg_ack ? "A" : "",
 456                msg->msg_sending ? "S" : "",
 457                msg->msg_receiving ? "R" : "",
 458                msg->msg_delayed ? "d" : "",
 459                msg->msg_txcredit ? "C" : "",
 460                msg->msg_peertxcredit ? "c" : "",
 461                msg->msg_rtrcredit ? "F" : "",
 462                msg->msg_peerrtrcredit ? "f" : "",
 463                msg->msg_onactivelist ? "!" : "",
 464                msg->msg_txpeer == NULL ? "<none>" : libcfs_nid2str(msg->msg_txpeer->lp_nid),
 465                msg->msg_rxpeer == NULL ? "<none>" : libcfs_nid2str(msg->msg_rxpeer->lp_nid));
 466 #endif
 467         msg->msg_ev.status = status;
 468
 469         if (msg->msg_md != NULL) {
 470                 cpt = lnet_cpt_of_cookie(msg->msg_md->md_lh.lh_cookie);
 471
 472                 lnet_res_lock(cpt);
 473                 lnet_msg_detach_md(msg, status);
 474                 lnet_res_unlock(cpt);
 475         }
 476
 477  again:
 478         rc = 0;
 479         if (!msg->msg_tx_committed && !msg->msg_rx_committed) {
 480                 /* not committed to network yet */
 481                 LASSERT(!msg->msg_onactivelist);
 482                 lnet_msg_free(msg);
 483                 return;
 484         }
 485
 486         /*
 487          * NB: routed message can be committed for both receiving and sending,
 488          * we should finalize in LIFO order and keep counters correct.
 489          * (finalize sending first then finalize receiving)
 490          */
 491         cpt = msg->msg_tx_committed ? msg->msg_tx_cpt : msg->msg_rx_cpt;
 492         lnet_net_lock(cpt);
 493
 494         container = the_lnet.ln_msg_containers[cpt];
 495         list_add_tail(&msg->msg_list, &container->msc_finalizing);
 496
 497         /* Recursion breaker.  Don't complete the message here if I am (or
 498          * enough other threads are) already completing messages */
 499
 500 #ifdef __KERNEL__
 501         my_slot = -1;
 502         for (i = 0; i < container->msc_nfinalizers; i++) {
 503                 if (container->msc_finalizers[i] == current)
 504                         break;
 505
 506                 if (my_slot < 0 && container->msc_finalizers[i] == NULL)
 507                         my_slot = i;
 508         }
 509
 510         if (i < container->msc_nfinalizers || my_slot < 0) {
 511                 lnet_net_unlock(cpt);
 512                 return;
 513         }
 514
 515         container->msc_finalizers[my_slot] = current;
 516 #else
 517         LASSERT(container->msc_nfinalizers == 1);
 518         if (container->msc_finalizers[0] != NULL) {
 519                 lnet_net_unlock(cpt);
 520                 return;
 521         }
 522
 523         my_slot = i = 0;
 524         container->msc_finalizers[0] = (struct lnet_msg_container *)1;
 525 #endif
 526
 527         while (!list_empty(&container->msc_finalizing)) {
 528                 msg = list_entry(container->msc_finalizing.next,
 529                                  lnet_msg_t, msg_list);
 530
 531                 list_del(&msg->msg_list);
 532
 533                 /* NB drops and regains the lnet lock if it actually does
 534                  * anything, so my finalizing friends can chomp along too */
 535                 rc = lnet_complete_msg_locked(msg, cpt);
 536                 if (rc != 0)
 537                         break;
 538         }
 539
 540         container->msc_finalizers[my_slot] = NULL;
 541         lnet_net_unlock(cpt);
 542
 543         if (rc != 0)
 544                 goto again;
 545 }
 546 EXPORT_SYMBOL(lnet_finalize);
 547
 548 void
 549 lnet_msg_container_cleanup(struct lnet_msg_container *container)
 550 {
 551         int     count = 0;
 552
 553         if (container->msc_init == 0)
 554                 return;
 555
 556         while (!list_empty(&container->msc_active)) {
 557                 lnet_msg_t *msg = list_entry(container->msc_active.next,
 558                                              lnet_msg_t, msg_activelist);
 559
 560                 LASSERT(msg->msg_onactivelist);
 561                 msg->msg_onactivelist = 0;
 562                 list_del(&msg->msg_activelist);
 563                 lnet_msg_free(msg);
 564                 count++;
 565         }
 566
 567         if (count > 0)
 568                 CERROR("%d active msg on exit\n", count);
 569
 570         if (container->msc_finalizers != NULL) {
 571                 LIBCFS_FREE(container->msc_finalizers,
 572                             container->msc_nfinalizers *
 573                             sizeof(*container->msc_finalizers));
 574                 container->msc_finalizers = NULL;
 575         }
 576 #ifdef LNET_USE_LIB_FREELIST
 577         lnet_freelist_fini(&container->msc_freelist);
 578 #endif
 579         container->msc_init = 0;
 580 }
 581
 582 int
 583 lnet_msg_container_setup(struct lnet_msg_container *container, int cpt)
 584 {
 585         int     rc;
 586
 587         container->msc_init = 1;
 588
 589         INIT_LIST_HEAD(&container->msc_active);
 590         INIT_LIST_HEAD(&container->msc_finalizing);
 591
 592 #ifdef LNET_USE_LIB_FREELIST
 593         memset(&container->msc_freelist, 0, sizeof(lnet_freelist_t));
 594
 595         rc = lnet_freelist_init(&container->msc_freelist,
 596                                 LNET_FL_MAX_MSGS, sizeof(lnet_msg_t));
 597         if (rc != 0) {
 598                 CERROR("Failed to init freelist for message container\n");
 599                 lnet_msg_container_cleanup(container);
 600                 return rc;
 601         }
 602 #else
 603         rc = 0;
 604 #endif
 605         /* number of CPUs */
 606         container->msc_nfinalizers = cfs_cpt_weight(lnet_cpt_table(), cpt);
 607
 608         LIBCFS_CPT_ALLOC(container->msc_finalizers, lnet_cpt_table(), cpt,
 609                          container->msc_nfinalizers *
 610                          sizeof(*container->msc_finalizers));
 611
 612         if (container->msc_finalizers == NULL) {
 613                 CERROR("Failed to allocate message finalizers\n");
 614                 lnet_msg_container_cleanup(container);
 615                 return -ENOMEM;
 616         }
 617
 618         return rc;
 619 }
 620
 621 void
 622 lnet_msg_containers_destroy(void)
 623 {
 624         struct lnet_msg_container *container;
 625         int     i;
 626
 627         if (the_lnet.ln_msg_containers == NULL)
 628                 return;
 629
 630         cfs_percpt_for_each(container, i, the_lnet.ln_msg_containers)
 631                 lnet_msg_container_cleanup(container);
 632
 633         cfs_percpt_free(the_lnet.ln_msg_containers);
 634         the_lnet.ln_msg_containers = NULL;
 635 }
 636
 637 int
 638 lnet_msg_containers_create(void)
 639 {
 640         struct lnet_msg_container *container;
 641         int     rc;
 642         int     i;
 643
 644         the_lnet.ln_msg_containers = cfs_percpt_alloc(lnet_cpt_table(),
 645                                                       sizeof(*container));
 646
 647         if (the_lnet.ln_msg_containers == NULL) {
 648                 CERROR("Failed to allocate cpu-partition data for network\n");
 649                 return -ENOMEM;
 650         }
 651
 652         cfs_percpt_for_each(container, i, the_lnet.ln_msg_containers) {
 653                 rc = lnet_msg_container_setup(container, i);
 654                 if (rc != 0) {
 655                         lnet_msg_containers_destroy();
 656                         return rc;
 657                 }
 658         }
 659
 660         return 0;
 661 }