lustre/ptlrpc/events.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (c) 2002, 2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of the Lustre file system, http://www.lustre.org
   7  *   Lustre is a trademark of Cluster File Systems, Inc.
   8  *
   9  *   You may have signed or agreed to another license before downloading
  10  *   this software.  If so, you are bound by the terms and conditions
  11  *   of that agreement, and the following does not apply to you.  See the
  12  *   LICENSE file included with this distribution for more information.
  13  *
  14  *   If you did not agree to a different license, then this copy of Lustre
  15  *   is open source software; you can redistribute it and/or modify it
  16  *   under the terms of version 2 of the GNU General Public License as
  17  *   published by the Free Software Foundation.
  18  *
  19  *   In either case, Lustre is distributed in the hope that it will be
  20  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  21  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *   license text for more details.
  23  *
  24  */
  25
  26 #define DEBUG_SUBSYSTEM S_RPC
  27
  28 #ifndef __KERNEL__
  29 # include <liblustre.h>
  30 #else
  31 # ifdef __mips64__
  32 #  include <linux/kernel.h>
  33 # endif
  34 #endif
  35 #include <obd_class.h>
  36 #include <lustre_net.h>
  37 #include "ptlrpc_internal.h"
  38
  39 lnet_handle_eq_t   ptlrpc_eq_h;
  40
  41 /*
  42  *  Client's outgoing request callback
  43  */
  44 void request_out_callback(lnet_event_t *ev)
  45 {
  46         struct ptlrpc_cb_id   *cbid = ev->md.user_ptr;
  47         struct ptlrpc_request *req = cbid->cbid_arg;
  48         ENTRY;
  49
  50         LASSERT (ev->type == LNET_EVENT_SEND ||
  51                  ev->type == LNET_EVENT_UNLINK);
  52         LASSERT (ev->unlinked);
  53
  54         DEBUG_REQ((ev->status == 0) ? D_NET : D_ERROR, req,
  55                   "type %d, status %d", ev->type, ev->status);
  56
  57         if (ev->type == LNET_EVENT_UNLINK || ev->status != 0) {
  58
  59                 /* Failed send: make it seem like the reply timed out, just
  60                  * like failing sends in client.c does currently...  */
  61
  62                 spin_lock(&req->rq_lock);
  63                 req->rq_net_err = 1;
  64                 spin_unlock(&req->rq_lock);
  65
  66                 ptlrpc_wake_client_req(req);
  67         }
  68
  69         /* these balance the references in ptl_send_rpc() */
  70         atomic_dec(&req->rq_import->imp_inflight);
  71         ptlrpc_req_finished(req);
  72
  73         EXIT;
  74 }
  75
  76 /*
  77  * Client's incoming reply callback
  78  */
  79 void reply_in_callback(lnet_event_t *ev)
  80 {
  81         struct ptlrpc_cb_id   *cbid = ev->md.user_ptr;
  82         struct ptlrpc_request *req = cbid->cbid_arg;
  83         ENTRY;
  84
  85         LASSERT (ev->type == LNET_EVENT_PUT ||
  86                  ev->type == LNET_EVENT_UNLINK);
  87         LASSERT (ev->unlinked);
  88         LASSERT (ev->md.start == req->rq_repmsg);
  89         LASSERT (ev->offset == 0);
  90         LASSERT (ev->mlength <= req->rq_replen);
  91
  92         DEBUG_REQ((ev->status == 0) ? D_NET : D_ERROR, req,
  93                   "type %d, status %d", ev->type, ev->status);
  94
  95         spin_lock(&req->rq_lock);
  96
  97         LASSERT (req->rq_receiving_reply);
  98         req->rq_receiving_reply = 0;
  99
 100         if (ev->type == LNET_EVENT_PUT && ev->status == 0) {
 101                 req->rq_replied = 1;
 102                 req->rq_nob_received = ev->mlength;
 103         }
 104
 105         /* NB don't unlock till after wakeup; req can disappear under us
 106          * since we don't have our own ref */
 107         ptlrpc_wake_client_req(req);
 108
 109         spin_unlock(&req->rq_lock);
 110         EXIT;
 111 }
 112
 113 /*
 114  * Client's bulk has been written/read
 115  */
 116 void client_bulk_callback (lnet_event_t *ev)
 117 {
 118         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 119         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 120         ENTRY;
 121
 122         LASSERT ((desc->bd_type == BULK_PUT_SINK &&
 123                   ev->type == LNET_EVENT_PUT) ||
 124                  (desc->bd_type == BULK_GET_SOURCE &&
 125                   ev->type == LNET_EVENT_GET) ||
 126                  ev->type == LNET_EVENT_UNLINK);
 127         LASSERT (ev->unlinked);
 128
 129         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 130                "event type %d, status %d, desc %p\n",
 131                ev->type, ev->status, desc);
 132
 133         spin_lock(&desc->bd_lock);
 134
 135         LASSERT(desc->bd_network_rw);
 136         desc->bd_network_rw = 0;
 137
 138         if (ev->type != LNET_EVENT_UNLINK && ev->status == 0) {
 139                 desc->bd_success = 1;
 140                 desc->bd_nob_transferred = ev->mlength;
 141                 desc->bd_sender = ev->sender;
 142         }
 143
 144         /* NB don't unlock till after wakeup; desc can disappear under us
 145          * otherwise */
 146         ptlrpc_wake_client_req(desc->bd_req);
 147
 148         spin_unlock(&desc->bd_lock);
 149         EXIT;
 150 }
 151
 152 /*
 153  * Server's incoming request callback
 154  */
 155 void request_in_callback(lnet_event_t *ev)
 156 {
 157         struct ptlrpc_cb_id               *cbid = ev->md.user_ptr;
 158         struct ptlrpc_request_buffer_desc *rqbd = cbid->cbid_arg;
 159         struct ptlrpc_service             *service = rqbd->rqbd_service;
 160         struct ptlrpc_request             *req;
 161         ENTRY;
 162
 163         LASSERT (ev->type == LNET_EVENT_PUT ||
 164                  ev->type == LNET_EVENT_UNLINK);
 165         LASSERT ((char *)ev->md.start >= rqbd->rqbd_buffer);
 166         LASSERT ((char *)ev->md.start + ev->offset + ev->mlength <=
 167                  rqbd->rqbd_buffer + service->srv_buf_size);
 168
 169         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 170                "event type %d, status %d, service %s\n",
 171                ev->type, ev->status, service->srv_name);
 172
 173         if (ev->unlinked) {
 174                 /* If this is the last request message to fit in the
 175                  * request buffer we can use the request object embedded in
 176                  * rqbd.  Note that if we failed to allocate a request,
 177                  * we'd have to re-post the rqbd, which we can't do in this
 178                  * context. */
 179                 req = &rqbd->rqbd_req;
 180                 memset(req, 0, sizeof (*req));
 181         } else {
 182                 LASSERT (ev->type == LNET_EVENT_PUT);
 183                 if (ev->status != 0) {
 184                         /* We moaned above already... */
 185                         return;
 186                 }
 187                 OBD_ALLOC_GFP(req, sizeof(*req), CFS_ALLOC_ATOMIC_TRY);
 188                 if (req == NULL) {
 189                         CERROR("Can't allocate incoming request descriptor: "
 190                                "Dropping %s RPC from %s\n",
 191                                service->srv_name,
 192                                libcfs_id2str(ev->initiator));
 193                         return;
 194                 }
 195         }
 196
 197         /* NB we ABSOLUTELY RELY on req being zeroed, so pointers are NULL,
 198          * flags are reset and scalars are zero.  We only set the message
 199          * size to non-zero if this was a successful receive. */
 200         req->rq_xid = ev->match_bits;
 201         req->rq_reqmsg = ev->md.start + ev->offset;
 202         if (ev->type == LNET_EVENT_PUT && ev->status == 0)
 203                 req->rq_reqlen = ev->mlength;
 204         do_gettimeofday(&req->rq_arrival_time);
 205         req->rq_peer = ev->initiator;
 206         req->rq_self = ev->target.nid;
 207         req->rq_rqbd = rqbd;
 208         req->rq_phase = RQ_PHASE_NEW;
 209 #ifdef CRAY_XT3
 210         req->rq_uid = ev->uid;
 211 #endif
 212
 213         spin_lock(&service->srv_lock);
 214
 215         req->rq_history_seq = service->srv_request_seq++;
 216         list_add_tail(&req->rq_history_list, &service->srv_request_history);
 217
 218         if (ev->unlinked) {
 219                 service->srv_nrqbd_receiving--;
 220                 CDEBUG(D_RPCTRACE,"Buffer complete: %d buffers still posted\n",
 221                        service->srv_nrqbd_receiving);
 222
 223                 /* Normally, don't complain about 0 buffers posted; LNET won't
 224                  * drop incoming reqs since we set the portal lazy */
 225                 if (test_req_buffer_pressure &&
 226                     ev->type != LNET_EVENT_UNLINK &&
 227                     service->srv_nrqbd_receiving == 0)
 228                         CWARN("All %s request buffers busy\n",
 229                               service->srv_name);
 230
 231                 /* req takes over the network's ref on rqbd */
 232         } else {
 233                 /* req takes a ref on rqbd */
 234                 rqbd->rqbd_refcount++;
 235         }
 236
 237         list_add_tail(&req->rq_list, &service->srv_request_queue);
 238         service->srv_n_queued_reqs++;
 239
 240         /* NB everything can disappear under us once the request
 241          * has been queued and we unlock, so do the wake now... */
 242         cfs_waitq_signal(&service->srv_waitq);
 243
 244         spin_unlock(&service->srv_lock);
 245         EXIT;
 246 }
 247
 248 /*
 249  *  Server's outgoing reply callback
 250  */
 251 void reply_out_callback(lnet_event_t *ev)
 252 {
 253         struct ptlrpc_cb_id       *cbid = ev->md.user_ptr;
 254         struct ptlrpc_reply_state *rs = cbid->cbid_arg;
 255         struct ptlrpc_service     *svc = rs->rs_service;
 256         ENTRY;
 257
 258         LASSERT (ev->type == LNET_EVENT_SEND ||
 259                  ev->type == LNET_EVENT_ACK ||
 260                  ev->type == LNET_EVENT_UNLINK);
 261
 262         if (!rs->rs_difficult) {
 263                 /* 'Easy' replies have no further processing so I drop the
 264                  * net's ref on 'rs' */
 265                 LASSERT (ev->unlinked);
 266                 ptlrpc_rs_decref(rs);
 267                 atomic_dec (&svc->srv_outstanding_replies);
 268                 EXIT;
 269                 return;
 270         }
 271
 272         LASSERT (rs->rs_on_net);
 273
 274         if (ev->unlinked) {
 275                 /* Last network callback.  The net's ref on 'rs' stays put
 276                  * until ptlrpc_server_handle_reply() is done with it */
 277                 spin_lock(&svc->srv_lock);
 278                 rs->rs_on_net = 0;
 279                 ptlrpc_schedule_difficult_reply (rs);
 280                 spin_unlock(&svc->srv_lock);
 281         }
 282
 283         EXIT;
 284 }
 285
 286 /*
 287  * Server's bulk completion callback
 288  */
 289 void server_bulk_callback (lnet_event_t *ev)
 290 {
 291         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 292         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 293         ENTRY;
 294
 295         LASSERT (ev->type == LNET_EVENT_SEND ||
 296                  ev->type == LNET_EVENT_UNLINK ||
 297                  (desc->bd_type == BULK_PUT_SOURCE &&
 298                   ev->type == LNET_EVENT_ACK) ||
 299                  (desc->bd_type == BULK_GET_SINK &&
 300                   ev->type == LNET_EVENT_REPLY));
 301
 302         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 303                "event type %d, status %d, desc %p\n",
 304                ev->type, ev->status, desc);
 305
 306         spin_lock(&desc->bd_lock);
 307
 308         if ((ev->type == LNET_EVENT_ACK ||
 309              ev->type == LNET_EVENT_REPLY) &&
 310             ev->status == 0) {
 311                 /* We heard back from the peer, so even if we get this
 312                  * before the SENT event (oh yes we can), we know we
 313                  * read/wrote the peer buffer and how much... */
 314                 desc->bd_success = 1;
 315                 desc->bd_nob_transferred = ev->mlength;
 316                 desc->bd_sender = ev->sender;
 317         }
 318
 319         if (ev->unlinked) {
 320                 /* This is the last callback no matter what... */
 321                 desc->bd_network_rw = 0;
 322                 cfs_waitq_signal(&desc->bd_waitq);
 323         }
 324
 325         spin_unlock(&desc->bd_lock);
 326         EXIT;
 327 }
 328
 329 static void ptlrpc_master_callback(lnet_event_t *ev)
 330 {
 331         struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
 332         void (*callback)(lnet_event_t *ev) = cbid->cbid_fn;
 333
 334         /* Honestly, it's best to find out early. */
 335         LASSERT (cbid->cbid_arg != LP_POISON);
 336         LASSERT (callback == request_out_callback ||
 337                  callback == reply_in_callback ||
 338                  callback == client_bulk_callback ||
 339                  callback == request_in_callback ||
 340                  callback == reply_out_callback ||
 341                  callback == server_bulk_callback);
 342
 343         callback (ev);
 344 }
 345
 346 int ptlrpc_uuid_to_peer (struct obd_uuid *uuid,
 347                          lnet_process_id_t *peer, lnet_nid_t *self)
 348 {
 349         int               best_dist = 0;
 350         int               best_order = 0;
 351         int               count = 0;
 352         int               rc = -ENOENT;
 353         int               portals_compatibility;
 354         int               dist;
 355         int               order;
 356         lnet_nid_t        dst_nid;
 357         lnet_nid_t        src_nid;
 358
 359         portals_compatibility = LNetCtl(IOC_LIBCFS_PORTALS_COMPATIBILITY, NULL);
 360
 361         peer->pid = LUSTRE_SRV_LNET_PID;
 362
 363         /* Choose the matching UUID that's closest */
 364         while (lustre_uuid_to_peer(uuid->uuid, &dst_nid, count++) == 0) {
 365                 dist = LNetDist(dst_nid, &src_nid, &order);
 366                 if (dist < 0)
 367                         continue;
 368
 369                 if (dist == 0) {                /* local! use loopback LND */
 370                         peer->nid = *self = LNET_MKNID(LNET_MKNET(LOLND, 0), 0);
 371                         rc = 0;
 372                         break;
 373                 }
 374
 375                 LASSERT (order >= 0);
 376                 if (rc < 0 ||
 377                     dist < best_dist ||
 378                     (dist == best_dist && order < best_order)) {
 379                         best_dist = dist;
 380                         best_order = order;
 381
 382                         if (portals_compatibility > 1) {
 383                                 /* Strong portals compatibility: Zero the nid's
 384                                  * NET, so if I'm reading new config logs, or
 385                                  * getting configured by (new) lconf I can
 386                                  * still talk to old servers. */
 387                                 dst_nid = LNET_MKNID(0, LNET_NIDADDR(dst_nid));
 388                                 src_nid = LNET_MKNID(0, LNET_NIDADDR(src_nid));
 389                         }
 390                         peer->nid = dst_nid;
 391                         *self = src_nid;
 392                         rc = 0;
 393                 }
 394         }
 395
 396         CDEBUG(D_NET,"%s->%s\n", uuid->uuid, libcfs_id2str(*peer));
 397         if (rc != 0)
 398                 CERROR("No NID found for %s\n", uuid->uuid);
 399         return rc;
 400 }
 401
 402 void ptlrpc_ni_fini(void)
 403 {
 404         cfs_waitq_t         waitq;
 405         struct l_wait_info  lwi;
 406         int                 rc;
 407         int                 retries;
 408
 409         /* Wait for the event queue to become idle since there may still be
 410          * messages in flight with pending events (i.e. the fire-and-forget
 411          * messages == client requests and "non-difficult" server
 412          * replies */
 413
 414         for (retries = 0;; retries++) {
 415                 rc = LNetEQFree(ptlrpc_eq_h);
 416                 switch (rc) {
 417                 default:
 418                         LBUG();
 419
 420                 case 0:
 421                         LNetNIFini();
 422                         return;
 423
 424                 case -EBUSY:
 425                         if (retries != 0)
 426                                 CWARN("Event queue still busy\n");
 427
 428                         /* Wait for a bit */
 429                         cfs_waitq_init(&waitq);
 430                         lwi = LWI_TIMEOUT(cfs_time_seconds(2), NULL, NULL);
 431                         l_wait_event(waitq, 0, &lwi);
 432                         break;
 433                 }
 434         }
 435         /* notreached */
 436 }
 437
 438 lnet_pid_t ptl_get_pid(void)
 439 {
 440         lnet_pid_t        pid;
 441
 442 #ifndef  __KERNEL__
 443         pid = getpid();
 444 #else
 445         pid = LUSTRE_SRV_LNET_PID;
 446 #endif
 447         return pid;
 448 }
 449
 450 int ptlrpc_ni_init(void)
 451 {
 452         int              rc;
 453         lnet_pid_t       pid;
 454
 455         pid = ptl_get_pid();
 456         CDEBUG(D_NET, "My pid is: %x\n", pid);
 457
 458         /* We're not passing any limits yet... */
 459         rc = LNetNIInit(pid);
 460         if (rc < 0) {
 461                 CDEBUG (D_NET, "Can't init network interface: %d\n", rc);
 462                 return (-ENOENT);
 463         }
 464
 465         /* CAVEAT EMPTOR: how we process portals events is _radically_
 466          * different depending on... */
 467 #ifdef __KERNEL__
 468         /* kernel portals calls our master callback when events are added to
 469          * the event queue.  In fact lustre never pulls events off this queue,
 470          * so it's only sized for some debug history. */
 471         rc = LNetEQAlloc(1024, ptlrpc_master_callback, &ptlrpc_eq_h);
 472 #else
 473         /* liblustre calls the master callback when it removes events from the
 474          * event queue.  The event queue has to be big enough not to drop
 475          * anything */
 476         rc = LNetEQAlloc(10240, LNET_EQ_HANDLER_NONE, &ptlrpc_eq_h);
 477 #endif
 478         if (rc == 0)
 479                 return 0;
 480
 481         CERROR ("Failed to allocate event queue: %d\n", rc);
 482         LNetNIFini();
 483
 484         return (-ENOMEM);
 485 }
 486
 487 #ifndef __KERNEL__
 488 CFS_LIST_HEAD(liblustre_wait_callbacks);
 489 CFS_LIST_HEAD(liblustre_idle_callbacks);
 490 void *liblustre_services_callback;
 491
 492 void *
 493 liblustre_register_waitidle_callback (struct list_head *callback_list,
 494                                       const char *name,
 495                                       int (*fn)(void *arg), void *arg)
 496 {
 497         struct liblustre_wait_callback *llwc;
 498
 499         OBD_ALLOC(llwc, sizeof(*llwc));
 500         LASSERT (llwc != NULL);
 501
 502         llwc->llwc_name = name;
 503         llwc->llwc_fn = fn;
 504         llwc->llwc_arg = arg;
 505         list_add_tail(&llwc->llwc_list, callback_list);
 506
 507         return (llwc);
 508 }
 509
 510 void
 511 liblustre_deregister_waitidle_callback (void *opaque)
 512 {
 513         struct liblustre_wait_callback *llwc = opaque;
 514
 515         list_del(&llwc->llwc_list);
 516         OBD_FREE(llwc, sizeof(*llwc));
 517 }
 518
 519 void *
 520 liblustre_register_wait_callback (const char *name,
 521                                   int (*fn)(void *arg), void *arg)
 522 {
 523         return liblustre_register_waitidle_callback(&liblustre_wait_callbacks,
 524                                                     name, fn, arg);
 525 }
 526
 527 void
 528 liblustre_deregister_wait_callback (void *opaque)
 529 {
 530         liblustre_deregister_waitidle_callback(opaque);
 531 }
 532
 533 void *
 534 liblustre_register_idle_callback (const char *name,
 535                                   int (*fn)(void *arg), void *arg)
 536 {
 537         return liblustre_register_waitidle_callback(&liblustre_idle_callbacks,
 538                                                     name, fn, arg);
 539 }
 540
 541 void
 542 liblustre_deregister_idle_callback (void *opaque)
 543 {
 544         liblustre_deregister_waitidle_callback(opaque);
 545 }
 546
 547 int
 548 liblustre_check_events (int timeout)
 549 {
 550         lnet_event_t ev;
 551         int         rc;
 552         int         i;
 553         ENTRY;
 554
 555         rc = LNetEQPoll(&ptlrpc_eq_h, 1, timeout * 1000, &ev, &i);
 556         if (rc == 0)
 557                 RETURN(0);
 558
 559         LASSERT (rc == -EOVERFLOW || rc == 1);
 560
 561         /* liblustre: no asynch callback so we can't affort to miss any
 562          * events... */
 563         if (rc == -EOVERFLOW) {
 564                 CERROR ("Dropped an event!!!\n");
 565                 abort();
 566         }
 567
 568         ptlrpc_master_callback (&ev);
 569         RETURN(1);
 570 }
 571
 572 int liblustre_waiting = 0;
 573
 574 int
 575 liblustre_wait_event (int timeout)
 576 {
 577         struct list_head               *tmp;
 578         struct liblustre_wait_callback *llwc;
 579         int                             found_something = 0;
 580
 581         /* single threaded recursion check... */
 582         liblustre_waiting = 1;
 583
 584         for (;;) {
 585                 /* Deal with all pending events */
 586                 while (liblustre_check_events(0))
 587                         found_something = 1;
 588
 589                 /* Give all registered callbacks a bite at the cherry */
 590                 list_for_each(tmp, &liblustre_wait_callbacks) {
 591                         llwc = list_entry(tmp, struct liblustre_wait_callback,
 592                                           llwc_list);
 593
 594                         if (llwc->llwc_fn(llwc->llwc_arg))
 595                                 found_something = 1;
 596                 }
 597
 598                 if (found_something || timeout == 0)
 599                         break;
 600
 601                 /* Nothing so far, but I'm allowed to block... */
 602                 found_something = liblustre_check_events(timeout);
 603                 if (!found_something)           /* still nothing */
 604                         break;                  /* I timed out */
 605         }
 606
 607         liblustre_waiting = 0;
 608
 609         return found_something;
 610 }
 611
 612 void
 613 liblustre_wait_idle(void)
 614 {
 615         static int recursed = 0;
 616
 617         struct list_head               *tmp;
 618         struct liblustre_wait_callback *llwc;
 619         int                             idle = 0;
 620
 621         LASSERT(!recursed);
 622         recursed = 1;
 623
 624         do {
 625                 liblustre_wait_event(0);
 626
 627                 idle = 1;
 628
 629                 list_for_each(tmp, &liblustre_idle_callbacks) {
 630                         llwc = list_entry(tmp, struct liblustre_wait_callback,
 631                                           llwc_list);
 632
 633                         if (!llwc->llwc_fn(llwc->llwc_arg)) {
 634                                 idle = 0;
 635                                 break;
 636                         }
 637                 }
 638
 639         } while (!idle);
 640
 641         recursed = 0;
 642 }
 643
 644 #endif /* __KERNEL__ */
 645
 646 int ptlrpc_init_portals(void)
 647 {
 648         int   rc = ptlrpc_ni_init();
 649
 650         if (rc != 0) {
 651                 CERROR("network initialisation failed\n");
 652                 return -EIO;
 653         }
 654 #ifndef __KERNEL__
 655         liblustre_services_callback =
 656                 liblustre_register_wait_callback("liblustre_check_services",
 657                                                  &liblustre_check_services, NULL);
 658 #endif
 659         rc = ptlrpcd_addref();
 660         if (rc == 0)
 661                 return 0;
 662
 663         CERROR("rpcd initialisation failed\n");
 664 #ifndef __KERNEL__
 665         liblustre_deregister_wait_callback(liblustre_services_callback);
 666 #endif
 667         ptlrpc_ni_fini();
 668         return rc;
 669 }
 670
 671 void ptlrpc_exit_portals(void)
 672 {
 673 #ifndef __KERNEL__
 674         liblustre_deregister_wait_callback(liblustre_services_callback);
 675 #endif
 676         ptlrpcd_decref();
 677         ptlrpc_ni_fini();
 678 }