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         /* NB we ABSOLUTELY RELY on req being zeroed, so pointers are NULL,
 329          * flags are reset and scalars are zero.  We only set the message
 330          * size to non-zero if this was a successful receive. */
 331         req->rq_xid = ev->match_bits;
 332         req->rq_reqbuf = ev->md.start + ev->offset;
 333         if (ev->type == LNET_EVENT_PUT && ev->status == 0)
 334                 req->rq_reqdata_len = ev->mlength;
 335         do_gettimeofday(&req->rq_arrival_time);
 336         req->rq_peer = ev->initiator;
 337         req->rq_self = ev->target.nid;
 338         req->rq_rqbd = rqbd;
 339         req->rq_phase = RQ_PHASE_NEW;
 340         spin_lock_init(&req->rq_lock);
 341         INIT_LIST_HEAD(&req->rq_timed_list);
 342         INIT_LIST_HEAD(&req->rq_exp_list);
 343         atomic_set(&req->rq_refcount, 1);
 344         if (ev->type == LNET_EVENT_PUT)
 345                 CDEBUG(D_INFO, "incoming req@%p x"LPU64" msgsize %u\n",
 346                        req, req->rq_xid, ev->mlength);
 347
 348         CDEBUG(D_RPCTRACE, "peer: %s\n", libcfs_id2str(req->rq_peer));
 349
 350         spin_lock(&svcpt->scp_lock);
 351
 352         ptlrpc_req_add_history(svcpt, req);
 353
 354         if (ev->unlinked) {
 355                 svcpt->scp_nrqbds_posted--;
 356                 CDEBUG(D_INFO, "Buffer complete: %d buffers still posted\n",
 357                        svcpt->scp_nrqbds_posted);
 358
 359                 /* Normally, don't complain about 0 buffers posted; LNET won't
 360                  * drop incoming reqs since we set the portal lazy */
 361                 if (test_req_buffer_pressure &&
 362                     ev->type != LNET_EVENT_UNLINK &&
 363                     svcpt->scp_nrqbds_posted == 0)
 364                         CWARN("All %s request buffers busy\n",
 365                               service->srv_name);
 366
 367                 /* req takes over the network's ref on rqbd */
 368         } else {
 369                 /* req takes a ref on rqbd */
 370                 rqbd->rqbd_refcount++;
 371         }
 372
 373         list_add_tail(&req->rq_list, &svcpt->scp_req_incoming);
 374         svcpt->scp_nreqs_incoming++;
 375
 376         /* NB everything can disappear under us once the request
 377          * has been queued and we unlock, so do the wake now... */
 378         wake_up(&svcpt->scp_waitq);
 379
 380         spin_unlock(&svcpt->scp_lock);
 381         EXIT;
 382 }
 383
 384 /*
 385  *  Server's outgoing reply callback
 386  */
 387 void reply_out_callback(lnet_event_t *ev)
 388 {
 389         struct ptlrpc_cb_id       *cbid = ev->md.user_ptr;
 390         struct ptlrpc_reply_state *rs = cbid->cbid_arg;
 391         struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
 392         ENTRY;
 393
 394         LASSERT (ev->type == LNET_EVENT_SEND ||
 395                  ev->type == LNET_EVENT_ACK ||
 396                  ev->type == LNET_EVENT_UNLINK);
 397
 398         if (!rs->rs_difficult) {
 399                 /* 'Easy' replies have no further processing so I drop the
 400                  * net's ref on 'rs' */
 401                 LASSERT (ev->unlinked);
 402                 ptlrpc_rs_decref(rs);
 403                 EXIT;
 404                 return;
 405         }
 406
 407         LASSERT (rs->rs_on_net);
 408
 409         if (ev->unlinked) {
 410                 /* Last network callback. The net's ref on 'rs' stays put
 411                  * until ptlrpc_handle_rs() is done with it */
 412                 spin_lock(&svcpt->scp_rep_lock);
 413                 spin_lock(&rs->rs_lock);
 414
 415                 rs->rs_on_net = 0;
 416                 if (!rs->rs_no_ack ||
 417                     rs->rs_transno <=
 418                     rs->rs_export->exp_obd->obd_last_committed)
 419                         ptlrpc_schedule_difficult_reply(rs);
 420
 421                 spin_unlock(&rs->rs_lock);
 422                 spin_unlock(&svcpt->scp_rep_lock);
 423         }
 424         EXIT;
 425 }
 426
 427 #ifdef HAVE_SERVER_SUPPORT
 428 /*
 429  * Server's bulk completion callback
 430  */
 431 void server_bulk_callback (lnet_event_t *ev)
 432 {
 433         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 434         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 435         ENTRY;
 436
 437         LASSERT(ev->type == LNET_EVENT_SEND ||
 438                 ev->type == LNET_EVENT_UNLINK ||
 439                 (desc->bd_type == BULK_PUT_SOURCE &&
 440                  ev->type == LNET_EVENT_ACK) ||
 441                 (desc->bd_type == BULK_GET_SINK &&
 442                  ev->type == LNET_EVENT_REPLY));
 443
 444         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 445                "event type %d, status %d, desc %p\n",
 446                ev->type, ev->status, desc);
 447
 448         spin_lock(&desc->bd_lock);
 449
 450         LASSERT(desc->bd_md_count > 0);
 451
 452         if ((ev->type == LNET_EVENT_ACK ||
 453              ev->type == LNET_EVENT_REPLY) &&
 454             ev->status == 0) {
 455                 /* We heard back from the peer, so even if we get this
 456                  * before the SENT event (oh yes we can), we know we
 457                  * read/wrote the peer buffer and how much... */
 458                 desc->bd_nob_transferred += ev->mlength;
 459                 desc->bd_sender = ev->sender;
 460         }
 461
 462         if (ev->status != 0)
 463                 desc->bd_failure = 1;
 464
 465         if (ev->unlinked) {
 466                 desc->bd_md_count--;
 467                 /* This is the last callback no matter what... */
 468                 if (desc->bd_md_count == 0)
 469                         wake_up(&desc->bd_waitq);
 470         }
 471
 472         spin_unlock(&desc->bd_lock);
 473         EXIT;
 474 }
 475 #endif
 476
 477 static void ptlrpc_master_callback(lnet_event_t *ev)
 478 {
 479         struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
 480         void (*callback)(lnet_event_t *ev) = cbid->cbid_fn;
 481
 482         /* Honestly, it's best to find out early. */
 483         LASSERT (cbid->cbid_arg != LP_POISON);
 484         LASSERT (callback == request_out_callback ||
 485                  callback == reply_in_callback ||
 486                  callback == client_bulk_callback ||
 487                  callback == request_in_callback ||
 488                  callback == reply_out_callback
 489 #ifdef HAVE_SERVER_SUPPORT
 490                  || callback == server_bulk_callback
 491 #endif
 492                  );
 493
 494         callback (ev);
 495 }
 496
 497 int ptlrpc_uuid_to_peer (struct obd_uuid *uuid,
 498                          lnet_process_id_t *peer, lnet_nid_t *self)
 499 {
 500         int               best_dist = 0;
 501         __u32             best_order = 0;
 502         int               count = 0;
 503         int               rc = -ENOENT;
 504         int               portals_compatibility;
 505         int               dist;
 506         __u32             order;
 507         lnet_nid_t        dst_nid;
 508         lnet_nid_t        src_nid;
 509
 510         portals_compatibility = LNetCtl(IOC_LIBCFS_PORTALS_COMPATIBILITY, NULL);
 511
 512         peer->pid = LUSTRE_SRV_LNET_PID;
 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                         if (portals_compatibility > 1) {
 533                                 /* Strong portals compatibility: Zero the nid's
 534                                  * NET, so if I'm reading new config logs, or
 535                                  * getting configured by (new) lconf I can
 536                                  * still talk to old servers. */
 537                                 dst_nid = LNET_MKNID(0, LNET_NIDADDR(dst_nid));
 538                                 src_nid = LNET_MKNID(0, LNET_NIDADDR(src_nid));
 539                         }
 540                         peer->nid = dst_nid;
 541                         *self = src_nid;
 542                         rc = 0;
 543                 }
 544         }
 545
 546         CDEBUG(D_NET,"%s->%s\n", uuid->uuid, libcfs_id2str(*peer));
 547         return rc;
 548 }
 549
 550 void ptlrpc_ni_fini(void)
 551 {
 552         wait_queue_head_t         waitq;
 553         struct l_wait_info  lwi;
 554         int                 rc;
 555         int                 retries;
 556
 557         /* Wait for the event queue to become idle since there may still be
 558          * messages in flight with pending events (i.e. the fire-and-forget
 559          * messages == client requests and "non-difficult" server
 560          * replies */
 561
 562         for (retries = 0;; retries++) {
 563                 rc = LNetEQFree(ptlrpc_eq_h);
 564                 switch (rc) {
 565                 default:
 566                         LBUG();
 567
 568                 case 0:
 569                         LNetNIFini();
 570                         return;
 571
 572                 case -EBUSY:
 573                         if (retries != 0)
 574                                 CWARN("Event queue still busy\n");
 575
 576                         /* Wait for a bit */
 577                         init_waitqueue_head(&waitq);
 578                         lwi = LWI_TIMEOUT(cfs_time_seconds(2), NULL, NULL);
 579                         l_wait_event(waitq, 0, &lwi);
 580                         break;
 581                 }
 582         }
 583         /* notreached */
 584 }
 585
 586 lnet_pid_t ptl_get_pid(void)
 587 {
 588         lnet_pid_t        pid;
 589
 590         pid = LUSTRE_SRV_LNET_PID;
 591         return pid;
 592 }
 593
 594 int ptlrpc_ni_init(void)
 595 {
 596         int              rc;
 597         lnet_pid_t       pid;
 598
 599         pid = ptl_get_pid();
 600         CDEBUG(D_NET, "My pid is: %x\n", pid);
 601
 602         /* We're not passing any limits yet... */
 603         rc = LNetNIInit(pid);
 604         if (rc < 0) {
 605                 CDEBUG (D_NET, "Can't init network interface: %d\n", rc);
 606                 return rc;
 607         }
 608
 609         /* CAVEAT EMPTOR: how we process portals events is _radically_
 610          * different depending on... */
 611         /* kernel LNet calls our master callback when there are new event,
 612          * because we are guaranteed to get every event via callback,
 613          * so we just set EQ size to 0 to avoid overhread of serializing
 614          * enqueue/dequeue operations in LNet. */
 615         rc = LNetEQAlloc(0, ptlrpc_master_callback, &ptlrpc_eq_h);
 616         if (rc == 0)
 617                 return 0;
 618
 619         CERROR ("Failed to allocate event queue: %d\n", rc);
 620         LNetNIFini();
 621
 622         return rc;
 623 }
 624
 625
 626 int ptlrpc_init_portals(void)
 627 {
 628         int   rc = ptlrpc_ni_init();
 629
 630         if (rc != 0) {
 631                 CERROR("network initialisation failed\n");
 632                 return rc;
 633         }
 634         rc = ptlrpcd_addref();
 635         if (rc == 0)
 636                 return 0;
 637
 638         CERROR("rpcd initialisation failed\n");
 639         ptlrpc_ni_fini();
 640         return rc;
 641 }
 642
 643 void ptlrpc_exit_portals(void)
 644 {
 645         ptlrpcd_decref();
 646         ptlrpc_ni_fini();
 647 }