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