lustre/ptlrpc/events.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) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, 2015, 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
  37 #define DEBUG_SUBSYSTEM S_RPC
  38
  39 #include <libcfs/libcfs.h>
  40 #include <linux/kernel.h>
  41 #include <obd_class.h>
  42 #include <lustre_net.h>
  43 #include <lustre_sec.h>
  44 #include "ptlrpc_internal.h"
  45
  46 lnet_handle_eq_t   ptlrpc_eq_h;
  47
  48 /*
  49  *  Client's outgoing request callback
  50  */
  51 void request_out_callback(lnet_event_t *ev)
  52 {
  53         struct ptlrpc_cb_id   *cbid = ev->md.user_ptr;
  54         struct ptlrpc_request *req = cbid->cbid_arg;
  55         bool                   wakeup = false;
  56         ENTRY;
  57
  58         LASSERT(ev->type == LNET_EVENT_SEND || ev->type == LNET_EVENT_UNLINK);
  59         LASSERT(ev->unlinked);
  60
  61         DEBUG_REQ(D_NET, req, "type %d, status %d", ev->type, ev->status);
  62
  63         sptlrpc_request_out_callback(req);
  64
  65         spin_lock(&req->rq_lock);
  66         req->rq_real_sent = cfs_time_current_sec();
  67         req->rq_req_unlinked = 1;
  68         /* reply_in_callback happened before request_out_callback? */
  69         if (req->rq_reply_unlinked)
  70                 wakeup = true;
  71
  72         if (ev->type == LNET_EVENT_UNLINK || ev->status != 0) {
  73                 /* Failed send: make it seem like the reply timed out, just
  74                  * like failing sends in client.c does currently...  */
  75                 req->rq_net_err = 1;
  76                 wakeup = true;
  77         }
  78
  79         if (wakeup)
  80                 ptlrpc_client_wake_req(req);
  81
  82         spin_unlock(&req->rq_lock);
  83
  84         ptlrpc_req_finished(req);
  85         EXIT;
  86 }
  87
  88 /*
  89  * Client's incoming reply callback
  90  */
  91 void reply_in_callback(lnet_event_t *ev)
  92 {
  93         struct ptlrpc_cb_id   *cbid = ev->md.user_ptr;
  94         struct ptlrpc_request *req = cbid->cbid_arg;
  95         ENTRY;
  96
  97         DEBUG_REQ(D_NET, req, "type %d, status %d", ev->type, ev->status);
  98
  99         LASSERT (ev->type == LNET_EVENT_PUT || ev->type == LNET_EVENT_UNLINK);
 100         LASSERT (ev->md.start == req->rq_repbuf);
 101         LASSERT (ev->offset + ev->mlength <= req->rq_repbuf_len);
 102         /* We've set LNET_MD_MANAGE_REMOTE for all outgoing requests
 103            for adaptive timeouts' early reply. */
 104         LASSERT((ev->md.options & LNET_MD_MANAGE_REMOTE) != 0);
 105
 106         spin_lock(&req->rq_lock);
 107
 108         req->rq_receiving_reply = 0;
 109         req->rq_early = 0;
 110         if (ev->unlinked)
 111                 req->rq_reply_unlinked = 1;
 112
 113         if (ev->status)
 114                 goto out_wake;
 115
 116         if (ev->type == LNET_EVENT_UNLINK) {
 117                 LASSERT(ev->unlinked);
 118                 DEBUG_REQ(D_NET, req, "unlink");
 119                 goto out_wake;
 120         }
 121
 122         if (ev->mlength < ev->rlength ) {
 123                 CDEBUG(D_RPCTRACE, "truncate req %p rpc %d - %d+%d\n", req,
 124                        req->rq_replen, ev->rlength, ev->offset);
 125                 req->rq_reply_truncated = 1;
 126                 req->rq_replied = 1;
 127                 req->rq_status = -EOVERFLOW;
 128                 req->rq_nob_received = ev->rlength + ev->offset;
 129                 goto out_wake;
 130         }
 131
 132         if ((ev->offset == 0) &&
 133             ((lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT))) {
 134                 /* Early reply */
 135                 DEBUG_REQ(D_ADAPTTO, req,
 136                           "Early reply received: mlen=%u offset=%d replen=%d "
 137                           "replied=%d unlinked=%d", ev->mlength, ev->offset,
 138                           req->rq_replen, req->rq_replied, ev->unlinked);
 139
 140                 req->rq_early_count++; /* number received, client side */
 141
 142                 /* already got the real reply or buffers are already unlinked */
 143                 if (req->rq_replied ||
 144                     req->rq_reply_unlinked == 1)
 145                         goto out_wake;
 146
 147                 req->rq_early = 1;
 148                 req->rq_reply_off = ev->offset;
 149                 req->rq_nob_received = ev->mlength;
 150                 /* And we're still receiving */
 151                 req->rq_receiving_reply = 1;
 152         } else {
 153                 /* Real reply */
 154                 req->rq_rep_swab_mask = 0;
 155                 req->rq_replied = 1;
 156                 /* Got reply, no resend required */
 157                 req->rq_resend = 0;
 158                 req->rq_reply_off = ev->offset;
 159                 req->rq_nob_received = ev->mlength;
 160                 /* LNetMDUnlink can't be called under the LNET_LOCK,
 161                    so we must unlink in ptlrpc_unregister_reply */
 162                 DEBUG_REQ(D_INFO, req,
 163                           "reply in flags=%x mlen=%u offset=%d replen=%d",
 164                           lustre_msg_get_flags(req->rq_reqmsg),
 165                           ev->mlength, ev->offset, req->rq_replen);
 166         }
 167
 168         req->rq_import->imp_last_reply_time = cfs_time_current_sec();
 169
 170 out_wake:
 171         /* NB don't unlock till after wakeup; req can disappear under us
 172          * since we don't have our own ref */
 173         ptlrpc_client_wake_req(req);
 174         spin_unlock(&req->rq_lock);
 175         EXIT;
 176 }
 177
 178 /*
 179  * Client's bulk has been written/read
 180  */
 181 void client_bulk_callback (lnet_event_t *ev)
 182 {
 183         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 184         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 185         struct ptlrpc_request   *req;
 186         ENTRY;
 187
 188         LASSERT((ptlrpc_is_bulk_put_sink(desc->bd_type) &&
 189                  ev->type == LNET_EVENT_PUT) ||
 190                 (ptlrpc_is_bulk_get_source(desc->bd_type) &&
 191                  ev->type == LNET_EVENT_GET) ||
 192                 ev->type == LNET_EVENT_UNLINK);
 193         LASSERT(ev->unlinked);
 194
 195         if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB, CFS_FAIL_ONCE))
 196                 ev->status = -EIO;
 197
 198         if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2,CFS_FAIL_ONCE))
 199                 ev->status = -EIO;
 200
 201         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 202                "event type %d, status %d, desc %p\n",
 203                ev->type, ev->status, desc);
 204
 205         spin_lock(&desc->bd_lock);
 206         req = desc->bd_req;
 207         LASSERT(desc->bd_md_count > 0);
 208         desc->bd_md_count--;
 209
 210         if (ev->type != LNET_EVENT_UNLINK && ev->status == 0) {
 211                 desc->bd_nob_transferred += ev->mlength;
 212                 desc->bd_sender = ev->sender;
 213         } else {
 214                 /* start reconnect and resend if network error hit */
 215                 spin_lock(&req->rq_lock);
 216                 req->rq_net_err = 1;
 217                 spin_unlock(&req->rq_lock);
 218         }
 219
 220         if (ev->status != 0)
 221                 desc->bd_failure = 1;
 222
 223         /* NB don't unlock till after wakeup; desc can disappear under us
 224          * otherwise */
 225         if (desc->bd_md_count == 0)
 226                 ptlrpc_client_wake_req(desc->bd_req);
 227
 228         spin_unlock(&desc->bd_lock);
 229         EXIT;
 230 }
 231
 232 /*
 233  * We will have percpt request history list for ptlrpc service in upcoming
 234  * patches because we don't want to be serialized by current per-service
 235  * history operations. So we require history ID can (somehow) show arriving
 236  * order w/o grabbing global lock, and user can sort them in userspace.
 237  *
 238  * This is how we generate history ID for ptlrpc_request:
 239  * ----------------------------------------------------
 240  * |  32 bits  |  16 bits  | (16 - X)bits  |  X bits  |
 241  * ----------------------------------------------------
 242  * |  seconds  | usec / 16 |   sequence    | CPT id   |
 243  * ----------------------------------------------------
 244  *
 245  * it might not be precise but should be good enough.
 246  */
 247
 248 #define REQS_CPT_BITS(svcpt)    ((svcpt)->scp_service->srv_cpt_bits)
 249
 250 #define REQS_SEC_SHIFT          32
 251 #define REQS_USEC_SHIFT         16
 252 #define REQS_SEQ_SHIFT(svcpt)   REQS_CPT_BITS(svcpt)
 253
 254 static void ptlrpc_req_add_history(struct ptlrpc_service_part *svcpt,
 255                                    struct ptlrpc_request *req)
 256 {
 257         __u64   sec = req->rq_arrival_time.tv_sec;
 258         __u32   usec = req->rq_arrival_time.tv_usec >> 4; /* usec / 16 */
 259         __u64   new_seq;
 260
 261         /* set sequence ID for request and add it to history list,
 262          * it must be called with hold svcpt::scp_lock */
 263
 264         new_seq = (sec << REQS_SEC_SHIFT) |
 265                   (usec << REQS_USEC_SHIFT) |
 266                   (svcpt->scp_cpt < 0 ? 0 : svcpt->scp_cpt);
 267
 268         if (new_seq > svcpt->scp_hist_seq) {
 269                 /* This handles the initial case of scp_hist_seq == 0 or
 270                  * we just jumped into a new time window */
 271                 svcpt->scp_hist_seq = new_seq;
 272         } else {
 273                 LASSERT(REQS_SEQ_SHIFT(svcpt) < REQS_USEC_SHIFT);
 274                 /* NB: increase sequence number in current usec bucket,
 275                  * however, it's possible that we used up all bits for
 276                  * sequence and jumped into the next usec bucket (future time),
 277                  * then we hope there will be less RPCs per bucket at some
 278                  * point, and sequence will catch up again */
 279                 svcpt->scp_hist_seq += (1U << REQS_SEQ_SHIFT(svcpt));
 280                 new_seq = svcpt->scp_hist_seq;
 281         }
 282
 283         req->rq_history_seq = new_seq;
 284
 285         list_add_tail(&req->rq_history_list, &svcpt->scp_hist_reqs);
 286 }
 287
 288 /*
 289  * Server's incoming request callback
 290  */
 291 void request_in_callback(lnet_event_t *ev)
 292 {
 293         struct ptlrpc_cb_id               *cbid = ev->md.user_ptr;
 294         struct ptlrpc_request_buffer_desc *rqbd = cbid->cbid_arg;
 295         struct ptlrpc_service_part        *svcpt = rqbd->rqbd_svcpt;
 296         struct ptlrpc_service             *service = svcpt->scp_service;
 297         struct ptlrpc_request             *req;
 298         ENTRY;
 299
 300         LASSERT (ev->type == LNET_EVENT_PUT ||
 301                  ev->type == LNET_EVENT_UNLINK);
 302         LASSERT ((char *)ev->md.start >= rqbd->rqbd_buffer);
 303         LASSERT ((char *)ev->md.start + ev->offset + ev->mlength <=
 304                  rqbd->rqbd_buffer + service->srv_buf_size);
 305
 306         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 307                "event type %d, status %d, service %s\n",
 308                ev->type, ev->status, service->srv_name);
 309
 310         if (ev->unlinked) {
 311                 /* If this is the last request message to fit in the
 312                  * request buffer we can use the request object embedded in
 313                  * rqbd.  Note that if we failed to allocate a request,
 314                  * we'd have to re-post the rqbd, which we can't do in this
 315                  * context. */
 316                 req = &rqbd->rqbd_req;
 317                 memset(req, 0, sizeof (*req));
 318         } else {
 319                 LASSERT (ev->type == LNET_EVENT_PUT);
 320                 if (ev->status != 0) {
 321                         /* We moaned above already... */
 322                         return;
 323                 }
 324                 req = ptlrpc_request_cache_alloc(GFP_ATOMIC);
 325                 if (req == NULL) {
 326                         CERROR("Can't allocate incoming request descriptor: "
 327                                "Dropping %s RPC from %s\n",
 328                                service->srv_name,
 329                                libcfs_id2str(ev->initiator));
 330                         return;
 331                 }
 332         }
 333
 334         ptlrpc_srv_req_init(req);
 335         /* NB we ABSOLUTELY RELY on req being zeroed, so pointers are NULL,
 336          * flags are reset and scalars are zero.  We only set the message
 337          * size to non-zero if this was a successful receive. */
 338         req->rq_xid = ev->match_bits;
 339         req->rq_reqbuf = ev->md.start + ev->offset;
 340         if (ev->type == LNET_EVENT_PUT && ev->status == 0)
 341                 req->rq_reqdata_len = ev->mlength;
 342         do_gettimeofday(&req->rq_arrival_time);
 343         req->rq_peer = ev->initiator;
 344         req->rq_self = ev->target.nid;
 345         req->rq_rqbd = rqbd;
 346         req->rq_phase = RQ_PHASE_NEW;
 347         if (ev->type == LNET_EVENT_PUT)
 348                 CDEBUG(D_INFO, "incoming req@%p x"LPU64" msgsize %u\n",
 349                        req, req->rq_xid, ev->mlength);
 350
 351         CDEBUG(D_RPCTRACE, "peer: %s\n", libcfs_id2str(req->rq_peer));
 352
 353         spin_lock(&svcpt->scp_lock);
 354
 355         ptlrpc_req_add_history(svcpt, req);
 356
 357         if (ev->unlinked) {
 358                 svcpt->scp_nrqbds_posted--;
 359                 CDEBUG(D_INFO, "Buffer complete: %d buffers still posted\n",
 360                        svcpt->scp_nrqbds_posted);
 361
 362                 /* Normally, don't complain about 0 buffers posted; LNET won't
 363                  * drop incoming reqs since we set the portal lazy */
 364                 if (test_req_buffer_pressure &&
 365                     ev->type != LNET_EVENT_UNLINK &&
 366                     svcpt->scp_nrqbds_posted == 0)
 367                         CWARN("All %s request buffers busy\n",
 368                               service->srv_name);
 369
 370                 /* req takes over the network's ref on rqbd */
 371         } else {
 372                 /* req takes a ref on rqbd */
 373                 rqbd->rqbd_refcount++;
 374         }
 375
 376         list_add_tail(&req->rq_list, &svcpt->scp_req_incoming);
 377         svcpt->scp_nreqs_incoming++;
 378
 379         /* NB everything can disappear under us once the request
 380          * has been queued and we unlock, so do the wake now... */
 381         wake_up(&svcpt->scp_waitq);
 382
 383         spin_unlock(&svcpt->scp_lock);
 384         EXIT;
 385 }
 386
 387 /*
 388  *  Server's outgoing reply callback
 389  */
 390 void reply_out_callback(lnet_event_t *ev)
 391 {
 392         struct ptlrpc_cb_id       *cbid = ev->md.user_ptr;
 393         struct ptlrpc_reply_state *rs = cbid->cbid_arg;
 394         struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
 395         ENTRY;
 396
 397         LASSERT (ev->type == LNET_EVENT_SEND ||
 398                  ev->type == LNET_EVENT_ACK ||
 399                  ev->type == LNET_EVENT_UNLINK);
 400
 401         if (!rs->rs_difficult) {
 402                 /* 'Easy' replies have no further processing so I drop the
 403                  * net's ref on 'rs' */
 404                 LASSERT (ev->unlinked);
 405                 ptlrpc_rs_decref(rs);
 406                 EXIT;
 407                 return;
 408         }
 409
 410         LASSERT (rs->rs_on_net);
 411
 412         if (ev->unlinked) {
 413                 /* Last network callback. The net's ref on 'rs' stays put
 414                  * until ptlrpc_handle_rs() is done with it */
 415                 spin_lock(&svcpt->scp_rep_lock);
 416                 spin_lock(&rs->rs_lock);
 417
 418                 rs->rs_on_net = 0;
 419                 if (!rs->rs_no_ack ||
 420                     rs->rs_transno <=
 421                     rs->rs_export->exp_obd->obd_last_committed)
 422                         ptlrpc_schedule_difficult_reply(rs);
 423
 424                 spin_unlock(&rs->rs_lock);
 425                 spin_unlock(&svcpt->scp_rep_lock);
 426         }
 427         EXIT;
 428 }
 429
 430 #ifdef HAVE_SERVER_SUPPORT
 431 /*
 432  * Server's bulk completion callback
 433  */
 434 void server_bulk_callback (lnet_event_t *ev)
 435 {
 436         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 437         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 438         ENTRY;
 439
 440         LASSERT(ev->type == LNET_EVENT_SEND ||
 441                 ev->type == LNET_EVENT_UNLINK ||
 442                 (ptlrpc_is_bulk_put_source(desc->bd_type) &&
 443                  ev->type == LNET_EVENT_ACK) ||
 444                 (ptlrpc_is_bulk_get_sink(desc->bd_type) &&
 445                  ev->type == LNET_EVENT_REPLY));
 446
 447         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 448                "event type %d, status %d, desc %p\n",
 449                ev->type, ev->status, desc);
 450
 451         spin_lock(&desc->bd_lock);
 452
 453         LASSERT(desc->bd_md_count > 0);
 454
 455         if ((ev->type == LNET_EVENT_ACK ||
 456              ev->type == LNET_EVENT_REPLY) &&
 457             ev->status == 0) {
 458                 /* We heard back from the peer, so even if we get this
 459                  * before the SENT event (oh yes we can), we know we
 460                  * read/wrote the peer buffer and how much... */
 461                 desc->bd_nob_transferred += ev->mlength;
 462                 desc->bd_sender = ev->sender;
 463         }
 464
 465         if (ev->status != 0)
 466                 desc->bd_failure = 1;
 467
 468         if (ev->unlinked) {
 469                 desc->bd_md_count--;
 470                 /* This is the last callback no matter what... */
 471                 if (desc->bd_md_count == 0)
 472                         wake_up(&desc->bd_waitq);
 473         }
 474
 475         spin_unlock(&desc->bd_lock);
 476         EXIT;
 477 }
 478 #endif
 479
 480 static void ptlrpc_master_callback(lnet_event_t *ev)
 481 {
 482         struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
 483         void (*callback)(lnet_event_t *ev) = cbid->cbid_fn;
 484
 485         /* Honestly, it's best to find out early. */
 486         LASSERT (cbid->cbid_arg != LP_POISON);
 487         LASSERT (callback == request_out_callback ||
 488                  callback == reply_in_callback ||
 489                  callback == client_bulk_callback ||
 490                  callback == request_in_callback ||
 491                  callback == reply_out_callback
 492 #ifdef HAVE_SERVER_SUPPORT
 493                  || callback == server_bulk_callback
 494 #endif
 495                  );
 496
 497         callback (ev);
 498 }
 499
 500 int ptlrpc_uuid_to_peer (struct obd_uuid *uuid,
 501                          lnet_process_id_t *peer, lnet_nid_t *self)
 502 {
 503         int               best_dist = 0;
 504         __u32             best_order = 0;
 505         int               count = 0;
 506         int               rc = -ENOENT;
 507         int               dist;
 508         __u32             order;
 509         lnet_nid_t        dst_nid;
 510         lnet_nid_t        src_nid;
 511
 512         peer->pid = LNET_PID_LUSTRE;
 513
 514         /* Choose the matching UUID that's closest */
 515         while (lustre_uuid_to_peer(uuid->uuid, &dst_nid, count++) == 0) {
 516                 dist = LNetDist(dst_nid, &src_nid, &order);
 517                 if (dist < 0)
 518                         continue;
 519
 520                 if (dist == 0) {                /* local! use loopback LND */
 521                         peer->nid = *self = LNET_MKNID(LNET_MKNET(LOLND, 0), 0);
 522                         rc = 0;
 523                         break;
 524                 }
 525
 526                 if (rc < 0 ||
 527                     dist < best_dist ||
 528                     (dist == best_dist && order < best_order)) {
 529                         best_dist = dist;
 530                         best_order = order;
 531
 532                         peer->nid = dst_nid;
 533                         *self = src_nid;
 534                         rc = 0;
 535                 }
 536         }
 537
 538         CDEBUG(D_NET,"%s->%s\n", uuid->uuid, libcfs_id2str(*peer));
 539         return rc;
 540 }
 541
 542 void ptlrpc_ni_fini(void)
 543 {
 544         wait_queue_head_t         waitq;
 545         struct l_wait_info  lwi;
 546         int                 rc;
 547         int                 retries;
 548
 549         /* Wait for the event queue to become idle since there may still be
 550          * messages in flight with pending events (i.e. the fire-and-forget
 551          * messages == client requests and "non-difficult" server
 552          * replies */
 553
 554         for (retries = 0;; retries++) {
 555                 rc = LNetEQFree(ptlrpc_eq_h);
 556                 switch (rc) {
 557                 default:
 558                         LBUG();
 559
 560                 case 0:
 561                         LNetNIFini();
 562                         return;
 563
 564                 case -EBUSY:
 565                         if (retries != 0)
 566                                 CWARN("Event queue still busy\n");
 567
 568                         /* Wait for a bit */
 569                         init_waitqueue_head(&waitq);
 570                         lwi = LWI_TIMEOUT(cfs_time_seconds(2), NULL, NULL);
 571                         l_wait_event(waitq, 0, &lwi);
 572                         break;
 573                 }
 574         }
 575         /* notreached */
 576 }
 577
 578 lnet_pid_t ptl_get_pid(void)
 579 {
 580         return LNET_PID_LUSTRE;
 581 }
 582
 583 int ptlrpc_ni_init(void)
 584 {
 585         int              rc;
 586         lnet_pid_t       pid;
 587
 588         pid = ptl_get_pid();
 589         CDEBUG(D_NET, "My pid is: %x\n", pid);
 590
 591         /* We're not passing any limits yet... */
 592         rc = LNetNIInit(pid);
 593         if (rc < 0) {
 594                 CDEBUG (D_NET, "Can't init network interface: %d\n", rc);
 595                 return rc;
 596         }
 597
 598         /* CAVEAT EMPTOR: how we process portals events is _radically_
 599          * different depending on... */
 600         /* kernel LNet calls our master callback when there are new event,
 601          * because we are guaranteed to get every event via callback,
 602          * so we just set EQ size to 0 to avoid overhread of serializing
 603          * enqueue/dequeue operations in LNet. */
 604         rc = LNetEQAlloc(0, ptlrpc_master_callback, &ptlrpc_eq_h);
 605         if (rc == 0)
 606                 return 0;
 607
 608         CERROR ("Failed to allocate event queue: %d\n", rc);
 609         LNetNIFini();
 610
 611         return rc;
 612 }
 613
 614
 615 int ptlrpc_init_portals(void)
 616 {
 617         int   rc = ptlrpc_ni_init();
 618
 619         if (rc != 0) {
 620                 CERROR("network initialisation failed\n");
 621                 return rc;
 622         }
 623         rc = ptlrpcd_addref();
 624         if (rc == 0)
 625                 return 0;
 626
 627         CERROR("rpcd initialisation failed\n");
 628         ptlrpc_ni_fini();
 629         return rc;
 630 }
 631
 632 void ptlrpc_exit_portals(void)
 633 {
 634         ptlrpcd_decref();
 635         ptlrpc_ni_fini();
 636 }