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, 2013, 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         ENTRY;
  56
  57         LASSERT (ev->type == LNET_EVENT_SEND ||
  58                  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         spin_lock(&req->rq_lock);
  65         req->rq_real_sent = cfs_time_current_sec();
  66         if (ev->unlinked)
  67                 req->rq_req_unlink = 0;
  68
  69         if (ev->type == LNET_EVENT_UNLINK || ev->status != 0) {
  70
  71                 /* Failed send: make it seem like the reply timed out, just
  72                  * like failing sends in client.c does currently...  */
  73
  74                 req->rq_net_err = 1;
  75                 ptlrpc_client_wake_req(req);
  76         }
  77         spin_unlock(&req->rq_lock);
  78
  79         ptlrpc_req_finished(req);
  80
  81         EXIT;
  82 }
  83
  84 /*
  85  * Client's incoming reply callback
  86  */
  87 void reply_in_callback(lnet_event_t *ev)
  88 {
  89         struct ptlrpc_cb_id   *cbid = ev->md.user_ptr;
  90         struct ptlrpc_request *req = cbid->cbid_arg;
  91         ENTRY;
  92
  93         DEBUG_REQ(D_NET, req, "type %d, status %d", ev->type, ev->status);
  94
  95         LASSERT (ev->type == LNET_EVENT_PUT || ev->type == LNET_EVENT_UNLINK);
  96         LASSERT (ev->md.start == req->rq_repbuf);
  97         LASSERT (ev->offset + ev->mlength <= req->rq_repbuf_len);
  98         /* We've set LNET_MD_MANAGE_REMOTE for all outgoing requests
  99            for adaptive timeouts' early reply. */
 100         LASSERT((ev->md.options & LNET_MD_MANAGE_REMOTE) != 0);
 101
 102         spin_lock(&req->rq_lock);
 103
 104         req->rq_receiving_reply = 0;
 105         req->rq_early = 0;
 106         if (ev->unlinked)
 107                 req->rq_reply_unlink = 0;
 108
 109         if (ev->status)
 110                 goto out_wake;
 111
 112         if (ev->type == LNET_EVENT_UNLINK) {
 113                 LASSERT(ev->unlinked);
 114                 DEBUG_REQ(D_NET, req, "unlink");
 115                 goto out_wake;
 116         }
 117
 118         if (ev->mlength < ev->rlength ) {
 119                 CDEBUG(D_RPCTRACE, "truncate req %p rpc %d - %d+%d\n", req,
 120                        req->rq_replen, ev->rlength, ev->offset);
 121                 req->rq_reply_truncate = 1;
 122                 req->rq_replied = 1;
 123                 req->rq_status = -EOVERFLOW;
 124                 req->rq_nob_received = ev->rlength + ev->offset;
 125                 goto out_wake;
 126         }
 127
 128         if ((ev->offset == 0) &&
 129             ((lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT))) {
 130                 /* Early reply */
 131                 DEBUG_REQ(D_ADAPTTO, req,
 132                           "Early reply received: mlen=%u offset=%d replen=%d "
 133                           "replied=%d unlinked=%d", ev->mlength, ev->offset,
 134                           req->rq_replen, req->rq_replied, ev->unlinked);
 135
 136                 req->rq_early_count++; /* number received, client side */
 137
 138                 if (req->rq_replied)   /* already got the real reply */
 139                         goto out_wake;
 140
 141                 req->rq_early = 1;
 142                 req->rq_reply_off = ev->offset;
 143                 req->rq_nob_received = ev->mlength;
 144                 /* And we're still receiving */
 145                 req->rq_receiving_reply = 1;
 146         } else {
 147                 /* Real reply */
 148                 req->rq_rep_swab_mask = 0;
 149                 req->rq_replied = 1;
 150                 /* Got reply, no resend required */
 151                 req->rq_resend = 0;
 152                 req->rq_reply_off = ev->offset;
 153                 req->rq_nob_received = ev->mlength;
 154                 /* LNetMDUnlink can't be called under the LNET_LOCK,
 155                    so we must unlink in ptlrpc_unregister_reply */
 156                 DEBUG_REQ(D_INFO, req,
 157                           "reply in flags=%x mlen=%u offset=%d replen=%d",
 158                           lustre_msg_get_flags(req->rq_reqmsg),
 159                           ev->mlength, ev->offset, req->rq_replen);
 160         }
 161
 162         req->rq_import->imp_last_reply_time = cfs_time_current_sec();
 163
 164 out_wake:
 165         /* NB don't unlock till after wakeup; req can disappear under us
 166          * since we don't have our own ref */
 167         ptlrpc_client_wake_req(req);
 168         spin_unlock(&req->rq_lock);
 169         EXIT;
 170 }
 171
 172 /*
 173  * Client's bulk has been written/read
 174  */
 175 void client_bulk_callback (lnet_event_t *ev)
 176 {
 177         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 178         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 179         struct ptlrpc_request   *req;
 180         ENTRY;
 181
 182         LASSERT ((desc->bd_type == BULK_PUT_SINK &&
 183                   ev->type == LNET_EVENT_PUT) ||
 184                  (desc->bd_type == BULK_GET_SOURCE &&
 185                   ev->type == LNET_EVENT_GET) ||
 186                  ev->type == LNET_EVENT_UNLINK);
 187         LASSERT (ev->unlinked);
 188
 189         if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB, CFS_FAIL_ONCE))
 190                 ev->status = -EIO;
 191
 192         if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2,CFS_FAIL_ONCE))
 193                 ev->status = -EIO;
 194
 195         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 196                "event type %d, status %d, desc %p\n",
 197                ev->type, ev->status, desc);
 198
 199         spin_lock(&desc->bd_lock);
 200         req = desc->bd_req;
 201         LASSERT(desc->bd_md_count > 0);
 202         desc->bd_md_count--;
 203
 204         if (ev->type != LNET_EVENT_UNLINK && ev->status == 0) {
 205                 desc->bd_nob_transferred += ev->mlength;
 206                 desc->bd_sender = ev->sender;
 207         } else {
 208                 /* start reconnect and resend if network error hit */
 209                 spin_lock(&req->rq_lock);
 210                 req->rq_net_err = 1;
 211                 spin_unlock(&req->rq_lock);
 212         }
 213
 214         if (ev->status != 0)
 215                 desc->bd_failure = 1;
 216
 217         /* NB don't unlock till after wakeup; desc can disappear under us
 218          * otherwise */
 219         if (desc->bd_md_count == 0)
 220                 ptlrpc_client_wake_req(desc->bd_req);
 221
 222         spin_unlock(&desc->bd_lock);
 223         EXIT;
 224 }
 225
 226 /*
 227  * We will have percpt request history list for ptlrpc service in upcoming
 228  * patches because we don't want to be serialized by current per-service
 229  * history operations. So we require history ID can (somehow) show arriving
 230  * order w/o grabbing global lock, and user can sort them in userspace.
 231  *
 232  * This is how we generate history ID for ptlrpc_request:
 233  * ----------------------------------------------------
 234  * |  32 bits  |  16 bits  | (16 - X)bits  |  X bits  |
 235  * ----------------------------------------------------
 236  * |  seconds  | usec / 16 |   sequence    | CPT id   |
 237  * ----------------------------------------------------
 238  *
 239  * it might not be precise but should be good enough.
 240  */
 241
 242 #define REQS_CPT_BITS(svcpt)    ((svcpt)->scp_service->srv_cpt_bits)
 243
 244 #define REQS_SEC_SHIFT          32
 245 #define REQS_USEC_SHIFT         16
 246 #define REQS_SEQ_SHIFT(svcpt)   REQS_CPT_BITS(svcpt)
 247
 248 static void ptlrpc_req_add_history(struct ptlrpc_service_part *svcpt,
 249                                    struct ptlrpc_request *req)
 250 {
 251         __u64   sec = req->rq_arrival_time.tv_sec;
 252         __u32   usec = req->rq_arrival_time.tv_usec >> 4; /* usec / 16 */
 253         __u64   new_seq;
 254
 255         /* set sequence ID for request and add it to history list,
 256          * it must be called with hold svcpt::scp_lock */
 257
 258         new_seq = (sec << REQS_SEC_SHIFT) |
 259                   (usec << REQS_USEC_SHIFT) |
 260                   (svcpt->scp_cpt < 0 ? 0 : svcpt->scp_cpt);
 261
 262         if (new_seq > svcpt->scp_hist_seq) {
 263                 /* This handles the initial case of scp_hist_seq == 0 or
 264                  * we just jumped into a new time window */
 265                 svcpt->scp_hist_seq = new_seq;
 266         } else {
 267                 LASSERT(REQS_SEQ_SHIFT(svcpt) < REQS_USEC_SHIFT);
 268                 /* NB: increase sequence number in current usec bucket,
 269                  * however, it's possible that we used up all bits for
 270                  * sequence and jumped into the next usec bucket (future time),
 271                  * then we hope there will be less RPCs per bucket at some
 272                  * point, and sequence will catch up again */
 273                 svcpt->scp_hist_seq += (1U << REQS_SEQ_SHIFT(svcpt));
 274                 new_seq = svcpt->scp_hist_seq;
 275         }
 276
 277         req->rq_history_seq = new_seq;
 278
 279         list_add_tail(&req->rq_history_list, &svcpt->scp_hist_reqs);
 280 }
 281
 282 /*
 283  * Server's incoming request callback
 284  */
 285 void request_in_callback(lnet_event_t *ev)
 286 {
 287         struct ptlrpc_cb_id               *cbid = ev->md.user_ptr;
 288         struct ptlrpc_request_buffer_desc *rqbd = cbid->cbid_arg;
 289         struct ptlrpc_service_part        *svcpt = rqbd->rqbd_svcpt;
 290         struct ptlrpc_service             *service = svcpt->scp_service;
 291         struct ptlrpc_request             *req;
 292         ENTRY;
 293
 294         LASSERT (ev->type == LNET_EVENT_PUT ||
 295                  ev->type == LNET_EVENT_UNLINK);
 296         LASSERT ((char *)ev->md.start >= rqbd->rqbd_buffer);
 297         LASSERT ((char *)ev->md.start + ev->offset + ev->mlength <=
 298                  rqbd->rqbd_buffer + service->srv_buf_size);
 299
 300         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 301                "event type %d, status %d, service %s\n",
 302                ev->type, ev->status, service->srv_name);
 303
 304         if (ev->unlinked) {
 305                 /* If this is the last request message to fit in the
 306                  * request buffer we can use the request object embedded in
 307                  * rqbd.  Note that if we failed to allocate a request,
 308                  * we'd have to re-post the rqbd, which we can't do in this
 309                  * context. */
 310                 req = &rqbd->rqbd_req;
 311                 memset(req, 0, sizeof (*req));
 312         } else {
 313                 LASSERT (ev->type == LNET_EVENT_PUT);
 314                 if (ev->status != 0) {
 315                         /* We moaned above already... */
 316                         return;
 317                 }
 318                 req = ptlrpc_request_cache_alloc(ALLOC_ATOMIC_TRY);
 319                 if (req == NULL) {
 320                         CERROR("Can't allocate incoming request descriptor: "
 321                                "Dropping %s RPC from %s\n",
 322                                service->srv_name,
 323                                libcfs_id2str(ev->initiator));
 324                         return;
 325                 }
 326         }
 327
 328         ptlrpc_srv_req_init(req);
 329         /* NB we ABSOLUTELY RELY on req being zeroed, so pointers are NULL,
 330          * flags are reset and scalars are zero.  We only set the message
 331          * size to non-zero if this was a successful receive. */
 332         req->rq_xid = ev->match_bits;
 333         req->rq_reqbuf = ev->md.start + ev->offset;
 334         if (ev->type == LNET_EVENT_PUT && ev->status == 0)
 335                 req->rq_reqdata_len = ev->mlength;
 336         do_gettimeofday(&req->rq_arrival_time);
 337         req->rq_peer = ev->initiator;
 338         req->rq_self = ev->target.nid;
 339         req->rq_rqbd = rqbd;
 340         req->rq_phase = RQ_PHASE_NEW;
 341         if (ev->type == LNET_EVENT_PUT)
 342                 CDEBUG(D_INFO, "incoming req@%p x"LPU64" msgsize %u\n",
 343                        req, req->rq_xid, ev->mlength);
 344
 345         CDEBUG(D_RPCTRACE, "peer: %s\n", libcfs_id2str(req->rq_peer));
 346
 347         spin_lock(&svcpt->scp_lock);
 348
 349         ptlrpc_req_add_history(svcpt, req);
 350
 351         if (ev->unlinked) {
 352                 svcpt->scp_nrqbds_posted--;
 353                 CDEBUG(D_INFO, "Buffer complete: %d buffers still posted\n",
 354                        svcpt->scp_nrqbds_posted);
 355
 356                 /* Normally, don't complain about 0 buffers posted; LNET won't
 357                  * drop incoming reqs since we set the portal lazy */
 358                 if (test_req_buffer_pressure &&
 359                     ev->type != LNET_EVENT_UNLINK &&
 360                     svcpt->scp_nrqbds_posted == 0)
 361                         CWARN("All %s request buffers busy\n",
 362                               service->srv_name);
 363
 364                 /* req takes over the network's ref on rqbd */
 365         } else {
 366                 /* req takes a ref on rqbd */
 367                 rqbd->rqbd_refcount++;
 368         }
 369
 370         list_add_tail(&req->rq_list, &svcpt->scp_req_incoming);
 371         svcpt->scp_nreqs_incoming++;
 372
 373         /* NB everything can disappear under us once the request
 374          * has been queued and we unlock, so do the wake now... */
 375         wake_up(&svcpt->scp_waitq);
 376
 377         spin_unlock(&svcpt->scp_lock);
 378         EXIT;
 379 }
 380
 381 /*
 382  *  Server's outgoing reply callback
 383  */
 384 void reply_out_callback(lnet_event_t *ev)
 385 {
 386         struct ptlrpc_cb_id       *cbid = ev->md.user_ptr;
 387         struct ptlrpc_reply_state *rs = cbid->cbid_arg;
 388         struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
 389         ENTRY;
 390
 391         LASSERT (ev->type == LNET_EVENT_SEND ||
 392                  ev->type == LNET_EVENT_ACK ||
 393                  ev->type == LNET_EVENT_UNLINK);
 394
 395         if (!rs->rs_difficult) {
 396                 /* 'Easy' replies have no further processing so I drop the
 397                  * net's ref on 'rs' */
 398                 LASSERT (ev->unlinked);
 399                 ptlrpc_rs_decref(rs);
 400                 EXIT;
 401                 return;
 402         }
 403
 404         LASSERT (rs->rs_on_net);
 405
 406         if (ev->unlinked) {
 407                 /* Last network callback. The net's ref on 'rs' stays put
 408                  * until ptlrpc_handle_rs() is done with it */
 409                 spin_lock(&svcpt->scp_rep_lock);
 410                 spin_lock(&rs->rs_lock);
 411
 412                 rs->rs_on_net = 0;
 413                 if (!rs->rs_no_ack ||
 414                     rs->rs_transno <=
 415                     rs->rs_export->exp_obd->obd_last_committed)
 416                         ptlrpc_schedule_difficult_reply(rs);
 417
 418                 spin_unlock(&rs->rs_lock);
 419                 spin_unlock(&svcpt->scp_rep_lock);
 420         }
 421         EXIT;
 422 }
 423
 424 #ifdef HAVE_SERVER_SUPPORT
 425 /*
 426  * Server's bulk completion callback
 427  */
 428 void server_bulk_callback (lnet_event_t *ev)
 429 {
 430         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 431         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 432         ENTRY;
 433
 434         LASSERT(ev->type == LNET_EVENT_SEND ||
 435                 ev->type == LNET_EVENT_UNLINK ||
 436                 (desc->bd_type == BULK_PUT_SOURCE &&
 437                  ev->type == LNET_EVENT_ACK) ||
 438                 (desc->bd_type == BULK_GET_SINK &&
 439                  ev->type == LNET_EVENT_REPLY));
 440
 441         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 442                "event type %d, status %d, desc %p\n",
 443                ev->type, ev->status, desc);
 444
 445         spin_lock(&desc->bd_lock);
 446
 447         LASSERT(desc->bd_md_count > 0);
 448
 449         if ((ev->type == LNET_EVENT_ACK ||
 450              ev->type == LNET_EVENT_REPLY) &&
 451             ev->status == 0) {
 452                 /* We heard back from the peer, so even if we get this
 453                  * before the SENT event (oh yes we can), we know we
 454                  * read/wrote the peer buffer and how much... */
 455                 desc->bd_nob_transferred += ev->mlength;
 456                 desc->bd_sender = ev->sender;
 457         }
 458
 459         if (ev->status != 0)
 460                 desc->bd_failure = 1;
 461
 462         if (ev->unlinked) {
 463                 desc->bd_md_count--;
 464                 /* This is the last callback no matter what... */
 465                 if (desc->bd_md_count == 0)
 466                         wake_up(&desc->bd_waitq);
 467         }
 468
 469         spin_unlock(&desc->bd_lock);
 470         EXIT;
 471 }
 472 #endif
 473
 474 static void ptlrpc_master_callback(lnet_event_t *ev)
 475 {
 476         struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
 477         void (*callback)(lnet_event_t *ev) = cbid->cbid_fn;
 478
 479         /* Honestly, it's best to find out early. */
 480         LASSERT (cbid->cbid_arg != LP_POISON);
 481         LASSERT (callback == request_out_callback ||
 482                  callback == reply_in_callback ||
 483                  callback == client_bulk_callback ||
 484                  callback == request_in_callback ||
 485                  callback == reply_out_callback
 486 #ifdef HAVE_SERVER_SUPPORT
 487                  || callback == server_bulk_callback
 488 #endif
 489                  );
 490
 491         callback (ev);
 492 }
 493
 494 int ptlrpc_uuid_to_peer (struct obd_uuid *uuid,
 495                          lnet_process_id_t *peer, lnet_nid_t *self)
 496 {
 497         int               best_dist = 0;
 498         __u32             best_order = 0;
 499         int               count = 0;
 500         int               rc = -ENOENT;
 501         int               portals_compatibility;
 502         int               dist;
 503         __u32             order;
 504         lnet_nid_t        dst_nid;
 505         lnet_nid_t        src_nid;
 506
 507         portals_compatibility = LNetCtl(IOC_LIBCFS_PORTALS_COMPATIBILITY, NULL);
 508
 509         peer->pid = LNET_PID_LUSTRE;
 510
 511         /* Choose the matching UUID that's closest */
 512         while (lustre_uuid_to_peer(uuid->uuid, &dst_nid, count++) == 0) {
 513                 dist = LNetDist(dst_nid, &src_nid, &order);
 514                 if (dist < 0)
 515                         continue;
 516
 517                 if (dist == 0) {                /* local! use loopback LND */
 518                         peer->nid = *self = LNET_MKNID(LNET_MKNET(LOLND, 0), 0);
 519                         rc = 0;
 520                         break;
 521                 }
 522
 523                 if (rc < 0 ||
 524                     dist < best_dist ||
 525                     (dist == best_dist && order < best_order)) {
 526                         best_dist = dist;
 527                         best_order = order;
 528
 529                         if (portals_compatibility > 1) {
 530                                 /* Strong portals compatibility: Zero the nid's
 531                                  * NET, so if I'm reading new config logs, or
 532                                  * getting configured by (new) lconf I can
 533                                  * still talk to old servers. */
 534                                 dst_nid = LNET_MKNID(0, LNET_NIDADDR(dst_nid));
 535                                 src_nid = LNET_MKNID(0, LNET_NIDADDR(src_nid));
 536                         }
 537                         peer->nid = dst_nid;
 538                         *self = src_nid;
 539                         rc = 0;
 540                 }
 541         }
 542
 543         CDEBUG(D_NET,"%s->%s\n", uuid->uuid, libcfs_id2str(*peer));
 544         return rc;
 545 }
 546
 547 void ptlrpc_ni_fini(void)
 548 {
 549         wait_queue_head_t         waitq;
 550         struct l_wait_info  lwi;
 551         int                 rc;
 552         int                 retries;
 553
 554         /* Wait for the event queue to become idle since there may still be
 555          * messages in flight with pending events (i.e. the fire-and-forget
 556          * messages == client requests and "non-difficult" server
 557          * replies */
 558
 559         for (retries = 0;; retries++) {
 560                 rc = LNetEQFree(ptlrpc_eq_h);
 561                 switch (rc) {
 562                 default:
 563                         LBUG();
 564
 565                 case 0:
 566                         LNetNIFini();
 567                         return;
 568
 569                 case -EBUSY:
 570                         if (retries != 0)
 571                                 CWARN("Event queue still busy\n");
 572
 573                         /* Wait for a bit */
 574                         init_waitqueue_head(&waitq);
 575                         lwi = LWI_TIMEOUT(cfs_time_seconds(2), NULL, NULL);
 576                         l_wait_event(waitq, 0, &lwi);
 577                         break;
 578                 }
 579         }
 580         /* notreached */
 581 }
 582
 583 lnet_pid_t ptl_get_pid(void)
 584 {
 585         return LNET_PID_LUSTRE;
 586 }
 587
 588 int ptlrpc_ni_init(void)
 589 {
 590         int              rc;
 591         lnet_pid_t       pid;
 592
 593         pid = ptl_get_pid();
 594         CDEBUG(D_NET, "My pid is: %x\n", pid);
 595
 596         /* We're not passing any limits yet... */
 597         rc = LNetNIInit(pid);
 598         if (rc < 0) {
 599                 CDEBUG (D_NET, "Can't init network interface: %d\n", rc);
 600                 return rc;
 601         }
 602
 603         /* CAVEAT EMPTOR: how we process portals events is _radically_
 604          * different depending on... */
 605         /* kernel LNet calls our master callback when there are new event,
 606          * because we are guaranteed to get every event via callback,
 607          * so we just set EQ size to 0 to avoid overhread of serializing
 608          * enqueue/dequeue operations in LNet. */
 609         rc = LNetEQAlloc(0, ptlrpc_master_callback, &ptlrpc_eq_h);
 610         if (rc == 0)
 611                 return 0;
 612
 613         CERROR ("Failed to allocate event queue: %d\n", rc);
 614         LNetNIFini();
 615
 616         return rc;
 617 }
 618
 619
 620 int ptlrpc_init_portals(void)
 621 {
 622         int   rc = ptlrpc_ni_init();
 623
 624         if (rc != 0) {
 625                 CERROR("network initialisation failed\n");
 626                 return rc;
 627         }
 628         rc = ptlrpcd_addref();
 629         if (rc == 0)
 630                 return 0;
 631
 632         CERROR("rpcd initialisation failed\n");
 633         ptlrpc_ni_fini();
 634         return rc;
 635 }
 636
 637 void ptlrpc_exit_portals(void)
 638 {
 639         ptlrpcd_decref();
 640         ptlrpc_ni_fini();
 641 }