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 <lustre_sec.h>
  38 #include "ptlrpc_internal.h"
  39
  40 lnet_handle_eq_t   ptlrpc_eq_h;
  41
  42 /*
  43  *  Client's outgoing request callback
  44  */
  45 void request_out_callback(lnet_event_t *ev)
  46 {
  47         struct ptlrpc_cb_id   *cbid = ev->md.user_ptr;
  48         struct ptlrpc_request *req = cbid->cbid_arg;
  49         ENTRY;
  50
  51         LASSERT (ev->type == LNET_EVENT_SEND ||
  52                  ev->type == LNET_EVENT_UNLINK);
  53         LASSERT (ev->unlinked);
  54
  55         DEBUG_REQ((ev->status == 0) ? D_NET : D_ERROR, req,
  56                   "type %d, status %d", ev->type, ev->status);
  57
  58         sptlrpc_request_out_callback(req);
  59
  60         if (ev->type == LNET_EVENT_UNLINK || ev->status != 0) {
  61
  62                 /* Failed send: make it seem like the reply timed out, just
  63                  * like failing sends in client.c does currently...  */
  64
  65                 spin_lock(&req->rq_lock);
  66                 req->rq_net_err = 1;
  67                 spin_unlock(&req->rq_lock);
  68
  69                 ptlrpc_wake_client_req(req);
  70         }
  71
  72         /* these balance the references in ptl_send_rpc() */
  73         atomic_dec(&req->rq_import->imp_inflight);
  74         ptlrpc_req_finished(req);
  75
  76         EXIT;
  77 }
  78
  79 /*
  80  * Client's incoming reply callback
  81  */
  82 void reply_in_callback(lnet_event_t *ev)
  83 {
  84         struct ptlrpc_cb_id   *cbid = ev->md.user_ptr;
  85         struct ptlrpc_request *req = cbid->cbid_arg;
  86         ENTRY;
  87
  88         LASSERT (ev->type == LNET_EVENT_PUT ||
  89                  ev->type == LNET_EVENT_UNLINK);
  90         LASSERT (ev->unlinked);
  91         LASSERT (ev->md.start == req->rq_repbuf);
  92         LASSERT (ev->offset == 0);
  93         LASSERT (ev->mlength <= req->rq_repbuf_len);
  94
  95         DEBUG_REQ((ev->status == 0) ? D_NET : D_ERROR, req,
  96                   "type %d, status %d", ev->type, ev->status);
  97
  98         spin_lock(&req->rq_lock);
  99
 100         LASSERT (req->rq_receiving_reply);
 101         req->rq_receiving_reply = 0;
 102
 103         if (ev->type == LNET_EVENT_PUT && ev->status == 0) {
 104                 req->rq_replied = 1;
 105                 req->rq_nob_received = ev->mlength;
 106         }
 107
 108         /* NB don't unlock till after wakeup; req can disappear under us
 109          * since we don't have our own ref */
 110         ptlrpc_wake_client_req(req);
 111
 112         spin_unlock(&req->rq_lock);
 113         EXIT;
 114 }
 115
 116 /*
 117  * Client's bulk has been written/read
 118  */
 119 void client_bulk_callback (lnet_event_t *ev)
 120 {
 121         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 122         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 123         ENTRY;
 124
 125         LASSERT ((desc->bd_type == BULK_PUT_SINK &&
 126                   ev->type == LNET_EVENT_PUT) ||
 127                  (desc->bd_type == BULK_GET_SOURCE &&
 128                   ev->type == LNET_EVENT_GET) ||
 129                  ev->type == LNET_EVENT_UNLINK);
 130         LASSERT (ev->unlinked);
 131
 132         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 133                "event type %d, status %d, desc %p\n",
 134                ev->type, ev->status, desc);
 135
 136         spin_lock(&desc->bd_lock);
 137
 138         LASSERT(desc->bd_network_rw);
 139         desc->bd_network_rw = 0;
 140
 141         if (ev->type != LNET_EVENT_UNLINK && ev->status == 0) {
 142                 desc->bd_success = 1;
 143                 desc->bd_nob_transferred = ev->mlength;
 144                 desc->bd_sender = ev->sender;
 145         }
 146
 147         sptlrpc_enc_pool_put_pages(desc);
 148
 149         /* NB don't unlock till after wakeup; desc can disappear under us
 150          * otherwise */
 151         ptlrpc_wake_client_req(desc->bd_req);
 152
 153         spin_unlock(&desc->bd_lock);
 154         EXIT;
 155 }
 156
 157 /*
 158  * Server's incoming request callback
 159  */
 160 void request_in_callback(lnet_event_t *ev)
 161 {
 162         struct ptlrpc_cb_id               *cbid = ev->md.user_ptr;
 163         struct ptlrpc_request_buffer_desc *rqbd = cbid->cbid_arg;
 164         struct ptlrpc_service             *service = rqbd->rqbd_service;
 165         struct ptlrpc_request             *req;
 166         ENTRY;
 167
 168         LASSERT (ev->type == LNET_EVENT_PUT ||
 169                  ev->type == LNET_EVENT_UNLINK);
 170         LASSERT ((char *)ev->md.start >= rqbd->rqbd_buffer);
 171         LASSERT ((char *)ev->md.start + ev->offset + ev->mlength <=
 172                  rqbd->rqbd_buffer + service->srv_buf_size);
 173
 174         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 175                "event type %d, status %d, service %s\n",
 176                ev->type, ev->status, service->srv_name);
 177
 178         if (ev->unlinked) {
 179                 /* If this is the last request message to fit in the
 180                  * request buffer we can use the request object embedded in
 181                  * rqbd.  Note that if we failed to allocate a request,
 182                  * we'd have to re-post the rqbd, which we can't do in this
 183                  * context. */
 184                 req = &rqbd->rqbd_req;
 185                 memset(req, 0, sizeof (*req));
 186         } else {
 187                 LASSERT (ev->type == LNET_EVENT_PUT);
 188                 if (ev->status != 0) {
 189                         /* We moaned above already... */
 190                         return;
 191                 }
 192                 OBD_ALLOC_GFP(req, sizeof(*req), CFS_ALLOC_ATOMIC_TRY);
 193                 if (req == NULL) {
 194                         CERROR("Can't allocate incoming request descriptor: "
 195                                "Dropping %s RPC from %s\n",
 196                                service->srv_name,
 197                                libcfs_id2str(ev->initiator));
 198                         return;
 199                 }
 200         }
 201
 202         /* NB we ABSOLUTELY RELY on req being zeroed, so pointers are NULL,
 203          * flags are reset and scalars are zero.  We only set the message
 204          * size to non-zero if this was a successful receive. */
 205         req->rq_xid = ev->match_bits;
 206         req->rq_reqbuf = ev->md.start + ev->offset;
 207         if (ev->type == LNET_EVENT_PUT && ev->status == 0)
 208                 req->rq_reqdata_len = ev->mlength;
 209         do_gettimeofday(&req->rq_arrival_time);
 210         req->rq_peer = ev->initiator;
 211         req->rq_self = ev->target.nid;
 212         req->rq_rqbd = rqbd;
 213         req->rq_phase = RQ_PHASE_NEW;
 214 #ifdef CRAY_XT3
 215         req->rq_uid = ev->uid;
 216 #endif
 217
 218         CDEBUG(D_RPCTRACE, "peer: %s\n", libcfs_id2str(req->rq_peer));
 219
 220         spin_lock(&service->srv_lock);
 221
 222         req->rq_history_seq = service->srv_request_seq++;
 223         list_add_tail(&req->rq_history_list, &service->srv_request_history);
 224
 225         if (ev->unlinked) {
 226                 service->srv_nrqbd_receiving--;
 227                 CDEBUG(D_INFO, "Buffer complete: %d buffers still posted\n",
 228                        service->srv_nrqbd_receiving);
 229
 230                 /* Normally, don't complain about 0 buffers posted; LNET won't
 231                  * drop incoming reqs since we set the portal lazy */
 232                 if (test_req_buffer_pressure &&
 233                     ev->type != LNET_EVENT_UNLINK &&
 234                     service->srv_nrqbd_receiving == 0)
 235                         CWARN("All %s request buffers busy\n",
 236                               service->srv_name);
 237
 238                 /* req takes over the network's ref on rqbd */
 239         } else {
 240                 /* req takes a ref on rqbd */
 241                 rqbd->rqbd_refcount++;
 242         }
 243
 244         list_add_tail(&req->rq_list, &service->srv_request_queue);
 245         service->srv_n_queued_reqs++;
 246
 247         /* NB everything can disappear under us once the request
 248          * has been queued and we unlock, so do the wake now... */
 249         cfs_waitq_signal(&service->srv_waitq);
 250
 251         spin_unlock(&service->srv_lock);
 252         EXIT;
 253 }
 254
 255 /*
 256  *  Server's outgoing reply callback
 257  */
 258 void reply_out_callback(lnet_event_t *ev)
 259 {
 260         struct ptlrpc_cb_id       *cbid = ev->md.user_ptr;
 261         struct ptlrpc_reply_state *rs = cbid->cbid_arg;
 262         struct ptlrpc_service     *svc = rs->rs_service;
 263         ENTRY;
 264
 265         LASSERT (ev->type == LNET_EVENT_SEND ||
 266                  ev->type == LNET_EVENT_ACK ||
 267                  ev->type == LNET_EVENT_UNLINK);
 268
 269         if (!rs->rs_difficult) {
 270                 /* 'Easy' replies have no further processing so I drop the
 271                  * net's ref on 'rs' */
 272                 LASSERT (ev->unlinked);
 273                 ptlrpc_rs_decref(rs);
 274                 atomic_dec (&svc->srv_outstanding_replies);
 275                 EXIT;
 276                 return;
 277         }
 278
 279         LASSERT (rs->rs_on_net);
 280
 281         if (ev->unlinked) {
 282                 /* Last network callback.  The net's ref on 'rs' stays put
 283                  * until ptlrpc_server_handle_reply() is done with it */
 284                 spin_lock(&svc->srv_lock);
 285                 rs->rs_on_net = 0;
 286                 ptlrpc_schedule_difficult_reply (rs);
 287                 spin_unlock(&svc->srv_lock);
 288         }
 289
 290         EXIT;
 291 }
 292
 293 /*
 294  * Server's bulk completion callback
 295  */
 296 void server_bulk_callback (lnet_event_t *ev)
 297 {
 298         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 299         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 300         ENTRY;
 301
 302         LASSERT (ev->type == LNET_EVENT_SEND ||
 303                  ev->type == LNET_EVENT_UNLINK ||
 304                  (desc->bd_type == BULK_PUT_SOURCE &&
 305                   ev->type == LNET_EVENT_ACK) ||
 306                  (desc->bd_type == BULK_GET_SINK &&
 307                   ev->type == LNET_EVENT_REPLY));
 308
 309         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 310                "event type %d, status %d, desc %p\n",
 311                ev->type, ev->status, desc);
 312
 313         spin_lock(&desc->bd_lock);
 314
 315         if ((ev->type == LNET_EVENT_ACK ||
 316              ev->type == LNET_EVENT_REPLY) &&
 317             ev->status == 0) {
 318                 /* We heard back from the peer, so even if we get this
 319                  * before the SENT event (oh yes we can), we know we
 320                  * read/wrote the peer buffer and how much... */
 321                 desc->bd_success = 1;
 322                 desc->bd_nob_transferred = ev->mlength;
 323                 desc->bd_sender = ev->sender;
 324         }
 325
 326         if (ev->unlinked) {
 327                 /* This is the last callback no matter what... */
 328                 desc->bd_network_rw = 0;
 329                 cfs_waitq_signal(&desc->bd_waitq);
 330         }
 331
 332         spin_unlock(&desc->bd_lock);
 333         EXIT;
 334 }
 335
 336 static void ptlrpc_master_callback(lnet_event_t *ev)
 337 {
 338         struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
 339         void (*callback)(lnet_event_t *ev) = cbid->cbid_fn;
 340
 341         /* Honestly, it's best to find out early. */
 342         LASSERT (cbid->cbid_arg != LP_POISON);
 343         LASSERT (callback == request_out_callback ||
 344                  callback == reply_in_callback ||
 345                  callback == client_bulk_callback ||
 346                  callback == request_in_callback ||
 347                  callback == reply_out_callback ||
 348                  callback == server_bulk_callback);
 349
 350         callback (ev);
 351 }
 352
 353 int ptlrpc_uuid_to_peer (struct obd_uuid *uuid,
 354                          lnet_process_id_t *peer, lnet_nid_t *self)
 355 {
 356         int               best_dist = 0;
 357         int               best_order = 0;
 358         int               count = 0;
 359         int               rc = -ENOENT;
 360         int               portals_compatibility;
 361         int               dist;
 362         int               order;
 363         lnet_nid_t        dst_nid;
 364         lnet_nid_t        src_nid;
 365
 366         portals_compatibility = LNetCtl(IOC_LIBCFS_PORTALS_COMPATIBILITY, NULL);
 367
 368         peer->pid = LUSTRE_SRV_LNET_PID;
 369
 370         /* Choose the matching UUID that's closest */
 371         while (lustre_uuid_to_peer(uuid->uuid, &dst_nid, count++) == 0) {
 372                 dist = LNetDist(dst_nid, &src_nid, &order);
 373                 if (dist < 0)
 374                         continue;
 375
 376                 if (dist == 0) {                /* local! use loopback LND */
 377                         peer->nid = *self = LNET_MKNID(LNET_MKNET(LOLND, 0), 0);
 378                         rc = 0;
 379                         break;
 380                 }
 381
 382                 LASSERT (order >= 0);
 383                 if (rc < 0 ||
 384                     dist < best_dist ||
 385                     (dist == best_dist && order < best_order)) {
 386                         best_dist = dist;
 387                         best_order = order;
 388
 389                         if (portals_compatibility > 1) {
 390                                 /* Strong portals compatibility: Zero the nid's
 391                                  * NET, so if I'm reading new config logs, or
 392                                  * getting configured by (new) lconf I can
 393                                  * still talk to old servers. */
 394                                 dst_nid = LNET_MKNID(0, LNET_NIDADDR(dst_nid));
 395                                 src_nid = LNET_MKNID(0, LNET_NIDADDR(src_nid));
 396                         }
 397                         peer->nid = dst_nid;
 398                         *self = src_nid;
 399                         rc = 0;
 400                 }
 401         }
 402
 403         CDEBUG(D_NET,"%s->%s\n", uuid->uuid, libcfs_id2str(*peer));
 404         if (rc != 0)
 405                 CERROR("No NID found for %s\n", uuid->uuid);
 406         return rc;
 407 }
 408
 409 void ptlrpc_ni_fini(void)
 410 {
 411         cfs_waitq_t         waitq;
 412         struct l_wait_info  lwi;
 413         int                 rc;
 414         int                 retries;
 415
 416         /* Wait for the event queue to become idle since there may still be
 417          * messages in flight with pending events (i.e. the fire-and-forget
 418          * messages == client requests and "non-difficult" server
 419          * replies */
 420
 421         for (retries = 0;; retries++) {
 422                 rc = LNetEQFree(ptlrpc_eq_h);
 423                 switch (rc) {
 424                 default:
 425                         LBUG();
 426
 427                 case 0:
 428                         LNetNIFini();
 429                         return;
 430
 431                 case -EBUSY:
 432                         if (retries != 0)
 433                                 CWARN("Event queue still busy\n");
 434
 435                         /* Wait for a bit */
 436                         cfs_waitq_init(&waitq);
 437                         lwi = LWI_TIMEOUT(cfs_time_seconds(2), NULL, NULL);
 438                         l_wait_event(waitq, 0, &lwi);
 439                         break;
 440                 }
 441         }
 442         /* notreached */
 443 }
 444
 445 lnet_pid_t ptl_get_pid(void)
 446 {
 447         lnet_pid_t        pid;
 448
 449 #ifndef  __KERNEL__
 450         pid = getpid();
 451 #else
 452         pid = LUSTRE_SRV_LNET_PID;
 453 #endif
 454         return pid;
 455 }
 456
 457 int ptlrpc_ni_init(void)
 458 {
 459         int              rc;
 460         lnet_pid_t       pid;
 461
 462         pid = ptl_get_pid();
 463         CDEBUG(D_NET, "My pid is: %x\n", pid);
 464
 465         /* We're not passing any limits yet... */
 466         rc = LNetNIInit(pid);
 467         if (rc < 0) {
 468                 CDEBUG (D_NET, "Can't init network interface: %d\n", rc);
 469                 return (-ENOENT);
 470         }
 471
 472         /* CAVEAT EMPTOR: how we process portals events is _radically_
 473          * different depending on... */
 474 #ifdef __KERNEL__
 475         /* kernel portals calls our master callback when events are added to
 476          * the event queue.  In fact lustre never pulls events off this queue,
 477          * so it's only sized for some debug history. */
 478         rc = LNetEQAlloc(1024, ptlrpc_master_callback, &ptlrpc_eq_h);
 479 #else
 480         /* liblustre calls the master callback when it removes events from the
 481          * event queue.  The event queue has to be big enough not to drop
 482          * anything */
 483         rc = LNetEQAlloc(10240, LNET_EQ_HANDLER_NONE, &ptlrpc_eq_h);
 484 #endif
 485         if (rc == 0)
 486                 return 0;
 487
 488         CERROR ("Failed to allocate event queue: %d\n", rc);
 489         LNetNIFini();
 490
 491         return (-ENOMEM);
 492 }
 493
 494 #ifndef __KERNEL__
 495 CFS_LIST_HEAD(liblustre_wait_callbacks);
 496 CFS_LIST_HEAD(liblustre_idle_callbacks);
 497 void *liblustre_services_callback;
 498
 499 void *
 500 liblustre_register_waitidle_callback (struct list_head *callback_list,
 501                                       const char *name,
 502                                       int (*fn)(void *arg), void *arg)
 503 {
 504         struct liblustre_wait_callback *llwc;
 505
 506         OBD_ALLOC(llwc, sizeof(*llwc));
 507         LASSERT (llwc != NULL);
 508
 509         llwc->llwc_name = name;
 510         llwc->llwc_fn = fn;
 511         llwc->llwc_arg = arg;
 512         list_add_tail(&llwc->llwc_list, callback_list);
 513
 514         return (llwc);
 515 }
 516
 517 void
 518 liblustre_deregister_waitidle_callback (void *opaque)
 519 {
 520         struct liblustre_wait_callback *llwc = opaque;
 521
 522         list_del(&llwc->llwc_list);
 523         OBD_FREE(llwc, sizeof(*llwc));
 524 }
 525
 526 void *
 527 liblustre_register_wait_callback (const char *name,
 528                                   int (*fn)(void *arg), void *arg)
 529 {
 530         return liblustre_register_waitidle_callback(&liblustre_wait_callbacks,
 531                                                     name, fn, arg);
 532 }
 533
 534 void
 535 liblustre_deregister_wait_callback (void *opaque)
 536 {
 537         liblustre_deregister_waitidle_callback(opaque);
 538 }
 539
 540 void *
 541 liblustre_register_idle_callback (const char *name,
 542                                   int (*fn)(void *arg), void *arg)
 543 {
 544         return liblustre_register_waitidle_callback(&liblustre_idle_callbacks,
 545                                                     name, fn, arg);
 546 }
 547
 548 void
 549 liblustre_deregister_idle_callback (void *opaque)
 550 {
 551         liblustre_deregister_waitidle_callback(opaque);
 552 }
 553
 554 int
 555 liblustre_check_events (int timeout)
 556 {
 557         lnet_event_t ev;
 558         int         rc;
 559         int         i;
 560         ENTRY;
 561
 562         rc = LNetEQPoll(&ptlrpc_eq_h, 1, timeout * 1000, &ev, &i);
 563         if (rc == 0)
 564                 RETURN(0);
 565
 566         LASSERT (rc == -EOVERFLOW || rc == 1);
 567
 568         /* liblustre: no asynch callback so we can't affort to miss any
 569          * events... */
 570         if (rc == -EOVERFLOW) {
 571                 CERROR ("Dropped an event!!!\n");
 572                 abort();
 573         }
 574
 575         ptlrpc_master_callback (&ev);
 576         RETURN(1);
 577 }
 578
 579 int liblustre_waiting = 0;
 580
 581 int
 582 liblustre_wait_event (int timeout)
 583 {
 584         struct list_head               *tmp;
 585         struct liblustre_wait_callback *llwc;
 586         int                             found_something = 0;
 587
 588         /* single threaded recursion check... */
 589         liblustre_waiting = 1;
 590
 591         for (;;) {
 592                 /* Deal with all pending events */
 593                 while (liblustre_check_events(0))
 594                         found_something = 1;
 595
 596                 /* Give all registered callbacks a bite at the cherry */
 597                 list_for_each(tmp, &liblustre_wait_callbacks) {
 598                         llwc = list_entry(tmp, struct liblustre_wait_callback,
 599                                           llwc_list);
 600
 601                         if (llwc->llwc_fn(llwc->llwc_arg))
 602                                 found_something = 1;
 603                 }
 604
 605                 if (found_something || timeout == 0)
 606                         break;
 607
 608                 /* Nothing so far, but I'm allowed to block... */
 609                 found_something = liblustre_check_events(timeout);
 610                 if (!found_something)           /* still nothing */
 611                         break;                  /* I timed out */
 612         }
 613
 614         liblustre_waiting = 0;
 615
 616         return found_something;
 617 }
 618
 619 void
 620 liblustre_wait_idle(void)
 621 {
 622         static int recursed = 0;
 623
 624         struct list_head               *tmp;
 625         struct liblustre_wait_callback *llwc;
 626         int                             idle = 0;
 627
 628         LASSERT(!recursed);
 629         recursed = 1;
 630
 631         do {
 632                 liblustre_wait_event(0);
 633
 634                 idle = 1;
 635
 636                 list_for_each(tmp, &liblustre_idle_callbacks) {
 637                         llwc = list_entry(tmp, struct liblustre_wait_callback,
 638                                           llwc_list);
 639
 640                         if (!llwc->llwc_fn(llwc->llwc_arg)) {
 641                                 idle = 0;
 642                                 break;
 643                         }
 644                 }
 645
 646         } while (!idle);
 647
 648         recursed = 0;
 649 }
 650
 651 #endif /* __KERNEL__ */
 652
 653 int ptlrpc_init_portals(void)
 654 {
 655         int   rc = ptlrpc_ni_init();
 656
 657         if (rc != 0) {
 658                 CERROR("network initialisation failed\n");
 659                 return -EIO;
 660         }
 661 #ifndef __KERNEL__
 662         liblustre_services_callback =
 663                 liblustre_register_wait_callback("liblustre_check_services",
 664                                                  &liblustre_check_services,
 665                                                  NULL);
 666 #endif
 667         rc = ptlrpcd_addref();
 668         if (rc == 0)
 669                 return 0;
 670
 671         CERROR("rpcd initialisation failed\n");
 672 #ifndef __KERNEL__
 673         liblustre_deregister_wait_callback(liblustre_services_callback);
 674 #endif
 675         ptlrpc_ni_fini();
 676         return rc;
 677 }
 678
 679 void ptlrpc_exit_portals(void)
 680 {
 681 #ifndef __KERNEL__
 682         liblustre_deregister_wait_callback(liblustre_services_callback);
 683 #endif
 684         ptlrpcd_decref();
 685         ptlrpc_ni_fini();
 686 }