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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32
  33 #define DEBUG_SUBSYSTEM S_RPC
  34
  35 #include <libcfs/libcfs.h>
  36 #include <linux/kernel.h>
  37 #include <obd_class.h>
  38 #include <lustre_net.h>
  39 #include <lustre_sec.h>
  40 #include "ptlrpc_internal.h"
  41
  42 struct lnet_handle_eq ptlrpc_eq_h;
  43
  44 /*
  45  *  Client's outgoing request callback
  46  */
  47 void request_out_callback(struct lnet_event *ev)
  48 {
  49         struct ptlrpc_cb_id   *cbid = ev->md.user_ptr;
  50         struct ptlrpc_request *req = cbid->cbid_arg;
  51         bool                   wakeup = false;
  52         ENTRY;
  53
  54         LASSERT(ev->type == LNET_EVENT_SEND || ev->type == LNET_EVENT_UNLINK);
  55         LASSERT(ev->unlinked);
  56
  57         DEBUG_REQ(D_NET, req, "type %d, status %d", ev->type, ev->status);
  58
  59         sptlrpc_request_out_callback(req);
  60
  61         spin_lock(&req->rq_lock);
  62         req->rq_real_sent = ktime_get_real_seconds();
  63         req->rq_req_unlinked = 1;
  64         /* reply_in_callback happened before request_out_callback? */
  65         if (req->rq_reply_unlinked)
  66                 wakeup = true;
  67
  68         if (ev->type == LNET_EVENT_UNLINK || ev->status != 0) {
  69                 /* Failed send: make it seem like the reply timed out, just
  70                  * like failing sends in client.c does currently...  */
  71                 req->rq_net_err = 1;
  72                 wakeup = true;
  73         }
  74
  75         if (wakeup)
  76                 ptlrpc_client_wake_req(req);
  77
  78         spin_unlock(&req->rq_lock);
  79
  80         ptlrpc_req_finished(req);
  81         EXIT;
  82 }
  83
  84 /*
  85  * Client's incoming reply callback
  86  */
  87 void reply_in_callback(struct lnet_event *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_unlinked = 1;
 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_truncated = 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                 /* already got the real reply or buffers are already unlinked */
 139                 if (req->rq_replied ||
 140                     req->rq_reply_unlinked == 1)
 141                         goto out_wake;
 142
 143                 req->rq_early = 1;
 144                 req->rq_reply_off = ev->offset;
 145                 req->rq_nob_received = ev->mlength;
 146                 /* And we're still receiving */
 147                 req->rq_receiving_reply = 1;
 148         } else {
 149                 /* Real reply */
 150                 req->rq_rep_swab_mask = 0;
 151                 req->rq_replied = 1;
 152                 /* Got reply, no resend required */
 153                 req->rq_resend = 0;
 154                 req->rq_reply_off = ev->offset;
 155                 req->rq_nob_received = ev->mlength;
 156                 /* LNetMDUnlink can't be called under the LNET_LOCK,
 157                    so we must unlink in ptlrpc_unregister_reply */
 158                 DEBUG_REQ(D_INFO, req,
 159                           "reply in flags=%x mlen=%u offset=%d replen=%d",
 160                           lustre_msg_get_flags(req->rq_reqmsg),
 161                           ev->mlength, ev->offset, req->rq_replen);
 162         }
 163
 164         if (lustre_msg_get_opc(req->rq_reqmsg) != OBD_PING)
 165                 req->rq_import->imp_last_reply_time = ktime_get_real_seconds();
 166
 167 out_wake:
 168         /* NB don't unlock till after wakeup; req can disappear under us
 169          * since we don't have our own ref */
 170         ptlrpc_client_wake_req(req);
 171         spin_unlock(&req->rq_lock);
 172         EXIT;
 173 }
 174
 175 /*
 176  * Client's bulk has been written/read
 177  */
 178 void client_bulk_callback(struct lnet_event *ev)
 179 {
 180         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 181         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 182         struct ptlrpc_request   *req;
 183         ENTRY;
 184
 185         LASSERT((ptlrpc_is_bulk_put_sink(desc->bd_type) &&
 186                  ev->type == LNET_EVENT_PUT) ||
 187                 (ptlrpc_is_bulk_get_source(desc->bd_type) &&
 188                  ev->type == LNET_EVENT_GET) ||
 189                 ev->type == LNET_EVENT_UNLINK);
 190         LASSERT(ev->unlinked);
 191
 192         if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB, CFS_FAIL_ONCE))
 193                 ev->status = -EIO;
 194
 195         if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2,CFS_FAIL_ONCE))
 196                 ev->status = -EIO;
 197
 198         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 199                "event type %d, status %d, desc %p\n",
 200                ev->type, ev->status, desc);
 201
 202         spin_lock(&desc->bd_lock);
 203         req = desc->bd_req;
 204         LASSERT(desc->bd_md_count > 0);
 205         desc->bd_md_count--;
 206
 207         if (ev->type != LNET_EVENT_UNLINK && ev->status == 0) {
 208                 desc->bd_nob_transferred += ev->mlength;
 209                 desc->bd_sender = ev->sender;
 210         } else {
 211                 /* start reconnect and resend if network error hit */
 212                 spin_lock(&req->rq_lock);
 213                 req->rq_net_err = 1;
 214                 spin_unlock(&req->rq_lock);
 215         }
 216
 217         if (ev->status != 0)
 218                 desc->bd_failure = 1;
 219
 220         /* NB don't unlock till after wakeup; desc can disappear under us
 221          * otherwise */
 222         if (desc->bd_md_count == 0)
 223                 ptlrpc_client_wake_req(desc->bd_req);
 224
 225         spin_unlock(&desc->bd_lock);
 226         EXIT;
 227 }
 228
 229 /*
 230  * We will have percpt request history list for ptlrpc service in upcoming
 231  * patches because we don't want to be serialized by current per-service
 232  * history operations. So we require history ID can (somehow) show arriving
 233  * order w/o grabbing global lock, and user can sort them in userspace.
 234  *
 235  * This is how we generate history ID for ptlrpc_request:
 236  * ----------------------------------------------------
 237  * |  32 bits  |  16 bits  | (16 - X)bits  |  X bits  |
 238  * ----------------------------------------------------
 239  * |  seconds  | usec / 16 |   sequence    | CPT id   |
 240  * ----------------------------------------------------
 241  *
 242  * it might not be precise but should be good enough.
 243  */
 244
 245 #define REQS_CPT_BITS(svcpt)    ((svcpt)->scp_service->srv_cpt_bits)
 246
 247 #define REQS_SEC_SHIFT          32
 248 #define REQS_USEC_SHIFT         16
 249 #define REQS_SEQ_SHIFT(svcpt)   REQS_CPT_BITS(svcpt)
 250
 251 static void ptlrpc_req_add_history(struct ptlrpc_service_part *svcpt,
 252                                    struct ptlrpc_request *req)
 253 {
 254         u64 sec = req->rq_arrival_time.tv_sec;
 255         u32 usec = req->rq_arrival_time.tv_nsec / NSEC_PER_USEC / 16; /* usec / 16 */
 256         u64 new_seq;
 257
 258         /* set sequence ID for request and add it to history list,
 259          * it must be called with hold svcpt::scp_lock */
 260
 261         new_seq = (sec << REQS_SEC_SHIFT) |
 262                   (usec << REQS_USEC_SHIFT) |
 263                   (svcpt->scp_cpt < 0 ? 0 : svcpt->scp_cpt);
 264
 265         if (new_seq > svcpt->scp_hist_seq) {
 266                 /* This handles the initial case of scp_hist_seq == 0 or
 267                  * we just jumped into a new time window */
 268                 svcpt->scp_hist_seq = new_seq;
 269         } else {
 270                 LASSERT(REQS_SEQ_SHIFT(svcpt) < REQS_USEC_SHIFT);
 271                 /* NB: increase sequence number in current usec bucket,
 272                  * however, it's possible that we used up all bits for
 273                  * sequence and jumped into the next usec bucket (future time),
 274                  * then we hope there will be less RPCs per bucket at some
 275                  * point, and sequence will catch up again */
 276                 svcpt->scp_hist_seq += (1U << REQS_SEQ_SHIFT(svcpt));
 277                 new_seq = svcpt->scp_hist_seq;
 278         }
 279
 280         req->rq_history_seq = new_seq;
 281
 282         list_add_tail(&req->rq_history_list, &svcpt->scp_hist_reqs);
 283 }
 284
 285 /*
 286  * Server's incoming request callback
 287  */
 288 void request_in_callback(struct lnet_event *ev)
 289 {
 290         struct ptlrpc_cb_id               *cbid = ev->md.user_ptr;
 291         struct ptlrpc_request_buffer_desc *rqbd = cbid->cbid_arg;
 292         struct ptlrpc_service_part        *svcpt = rqbd->rqbd_svcpt;
 293         struct ptlrpc_service             *service = svcpt->scp_service;
 294         struct ptlrpc_request             *req;
 295         ENTRY;
 296
 297         LASSERT (ev->type == LNET_EVENT_PUT ||
 298                  ev->type == LNET_EVENT_UNLINK);
 299         LASSERT ((char *)ev->md.start >= rqbd->rqbd_buffer);
 300         LASSERT ((char *)ev->md.start + ev->offset + ev->mlength <=
 301                  rqbd->rqbd_buffer + service->srv_buf_size);
 302
 303         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 304                "event type %d, status %d, service %s\n",
 305                ev->type, ev->status, service->srv_name);
 306
 307         if (ev->unlinked) {
 308                 /* If this is the last request message to fit in the
 309                  * request buffer we can use the request object embedded in
 310                  * rqbd.  Note that if we failed to allocate a request,
 311                  * we'd have to re-post the rqbd, which we can't do in this
 312                  * context. */
 313                 req = &rqbd->rqbd_req;
 314                 memset(req, 0, sizeof (*req));
 315         } else {
 316                 LASSERT (ev->type == LNET_EVENT_PUT);
 317                 if (ev->status != 0) {
 318                         /* We moaned above already... */
 319                         return;
 320                 }
 321                 req = ptlrpc_request_cache_alloc(GFP_ATOMIC);
 322                 if (req == NULL) {
 323                         CERROR("Can't allocate incoming request descriptor: "
 324                                "Dropping %s RPC from %s\n",
 325                                service->srv_name,
 326                                libcfs_id2str(ev->initiator));
 327                         return;
 328                 }
 329         }
 330
 331         ptlrpc_srv_req_init(req);
 332         /* NB we ABSOLUTELY RELY on req being zeroed, so pointers are NULL,
 333          * flags are reset and scalars are zero.  We only set the message
 334          * size to non-zero if this was a successful receive. */
 335         req->rq_xid = ev->match_bits;
 336         req->rq_reqbuf = ev->md.start + ev->offset;
 337         if (ev->type == LNET_EVENT_PUT && ev->status == 0)
 338                 req->rq_reqdata_len = ev->mlength;
 339         ktime_get_real_ts64(&req->rq_arrival_time);
 340         /* Multi-Rail: keep track of both initiator and source NID. */
 341         req->rq_peer = ev->initiator;
 342         req->rq_source = ev->source;
 343         req->rq_self = ev->target.nid;
 344         req->rq_rqbd = rqbd;
 345         req->rq_phase = RQ_PHASE_NEW;
 346         if (ev->type == LNET_EVENT_PUT)
 347                 CDEBUG(D_INFO, "incoming req@%p x%llu msgsize %u\n",
 348                        req, req->rq_xid, ev->mlength);
 349
 350         CDEBUG(D_RPCTRACE, "peer: %s (source: %s)\n",
 351                 libcfs_id2str(req->rq_peer), libcfs_id2str(req->rq_source));
 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(struct lnet_event *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                     list_empty(&rs->rs_obd_list))
 423                         ptlrpc_schedule_difficult_reply(rs);
 424
 425                 spin_unlock(&rs->rs_lock);
 426                 spin_unlock(&svcpt->scp_rep_lock);
 427         }
 428         EXIT;
 429 }
 430
 431 #ifdef HAVE_SERVER_SUPPORT
 432 /*
 433  * Server's bulk completion callback
 434  */
 435 void server_bulk_callback(struct lnet_event *ev)
 436 {
 437         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 438         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 439         ENTRY;
 440
 441         LASSERT(ev->type == LNET_EVENT_SEND ||
 442                 ev->type == LNET_EVENT_UNLINK ||
 443                 (ptlrpc_is_bulk_put_source(desc->bd_type) &&
 444                  ev->type == LNET_EVENT_ACK) ||
 445                 (ptlrpc_is_bulk_get_sink(desc->bd_type) &&
 446                  ev->type == LNET_EVENT_REPLY));
 447
 448         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 449                "event type %d, status %d, desc %p\n",
 450                ev->type, ev->status, desc);
 451
 452         spin_lock(&desc->bd_lock);
 453
 454         LASSERT(desc->bd_md_count > 0);
 455
 456         if ((ev->type == LNET_EVENT_ACK ||
 457              ev->type == LNET_EVENT_REPLY) &&
 458             ev->status == 0) {
 459                 /* We heard back from the peer, so even if we get this
 460                  * before the SENT event (oh yes we can), we know we
 461                  * read/wrote the peer buffer and how much... */
 462                 desc->bd_nob_transferred += ev->mlength;
 463                 desc->bd_sender = ev->sender;
 464         }
 465
 466         if (ev->status != 0)
 467                 desc->bd_failure = 1;
 468
 469         if (ev->unlinked) {
 470                 desc->bd_md_count--;
 471                 /* This is the last callback no matter what... */
 472                 if (desc->bd_md_count == 0)
 473                         wake_up(&desc->bd_waitq);
 474         }
 475
 476         spin_unlock(&desc->bd_lock);
 477         EXIT;
 478 }
 479 #endif
 480
 481 static void ptlrpc_master_callback(struct lnet_event *ev)
 482 {
 483         struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
 484         void (*callback)(struct lnet_event *ev) = cbid->cbid_fn;
 485
 486         /* Honestly, it's best to find out early. */
 487         LASSERT (cbid->cbid_arg != LP_POISON);
 488         LASSERT (callback == request_out_callback ||
 489                  callback == reply_in_callback ||
 490                  callback == client_bulk_callback ||
 491                  callback == request_in_callback ||
 492                  callback == reply_out_callback
 493 #ifdef HAVE_SERVER_SUPPORT
 494                  || callback == server_bulk_callback
 495 #endif
 496                  );
 497
 498         callback (ev);
 499 }
 500
 501 int ptlrpc_uuid_to_peer(struct obd_uuid *uuid,
 502                         struct lnet_process_id *peer, lnet_nid_t *self)
 503 {
 504         int               best_dist = 0;
 505         __u32             best_order = 0;
 506         int               count = 0;
 507         int               rc = -ENOENT;
 508         int               dist;
 509         __u32             order;
 510         lnet_nid_t        dst_nid;
 511         lnet_nid_t        src_nid;
 512
 513         peer->pid = LNET_PID_LUSTRE;
 514
 515         /* Choose the matching UUID that's closest */
 516         while (lustre_uuid_to_peer(uuid->uuid, &dst_nid, count++) == 0) {
 517                 if (peer->nid != LNET_NID_ANY && LNET_NIDADDR(peer->nid) == 0 &&
 518                     LNET_NIDNET(dst_nid) != LNET_NIDNET(peer->nid))
 519                         continue;
 520
 521                 dist = LNetDist(dst_nid, &src_nid, &order);
 522                 if (dist < 0)
 523                         continue;
 524
 525                 if (dist == 0) {                /* local! use loopback LND */
 526                         peer->nid = *self = LNET_MKNID(LNET_MKNET(LOLND, 0), 0);
 527                         rc = 0;
 528                         break;
 529                 }
 530
 531                 if (rc < 0 ||
 532                     dist < best_dist ||
 533                     (dist == best_dist && order < best_order)) {
 534                         best_dist = dist;
 535                         best_order = order;
 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 }