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, 2014, 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                 if (req->rq_replied)   /* already got the real reply */
 143                         goto out_wake;
 144
 145                 req->rq_early = 1;
 146                 req->rq_reply_off = ev->offset;
 147                 req->rq_nob_received = ev->mlength;
 148                 /* And we're still receiving */
 149                 req->rq_receiving_reply = 1;
 150         } else {
 151                 /* Real reply */
 152                 req->rq_rep_swab_mask = 0;
 153                 req->rq_replied = 1;
 154                 /* Got reply, no resend required */
 155                 req->rq_resend = 0;
 156                 req->rq_reply_off = ev->offset;
 157                 req->rq_nob_received = ev->mlength;
 158                 /* LNetMDUnlink can't be called under the LNET_LOCK,
 159                    so we must unlink in ptlrpc_unregister_reply */
 160                 DEBUG_REQ(D_INFO, req,
 161                           "reply in flags=%x mlen=%u offset=%d replen=%d",
 162                           lustre_msg_get_flags(req->rq_reqmsg),
 163                           ev->mlength, ev->offset, req->rq_replen);
 164         }
 165
 166         req->rq_import->imp_last_reply_time = cfs_time_current_sec();
 167
 168 out_wake:
 169         /* NB don't unlock till after wakeup; req can disappear under us
 170          * since we don't have our own ref */
 171         ptlrpc_client_wake_req(req);
 172         spin_unlock(&req->rq_lock);
 173         EXIT;
 174 }
 175
 176 /*
 177  * Client's bulk has been written/read
 178  */
 179 void client_bulk_callback (lnet_event_t *ev)
 180 {
 181         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 182         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 183         struct ptlrpc_request   *req;
 184         ENTRY;
 185
 186         LASSERT ((desc->bd_type == BULK_PUT_SINK &&
 187                   ev->type == LNET_EVENT_PUT) ||
 188                  (desc->bd_type == BULK_GET_SOURCE &&
 189                   ev->type == LNET_EVENT_GET) ||
 190                  ev->type == LNET_EVENT_UNLINK);
 191         LASSERT (ev->unlinked);
 192
 193         if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB, CFS_FAIL_ONCE))
 194                 ev->status = -EIO;
 195
 196         if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2,CFS_FAIL_ONCE))
 197                 ev->status = -EIO;
 198
 199         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 200                "event type %d, status %d, desc %p\n",
 201                ev->type, ev->status, desc);
 202
 203         spin_lock(&desc->bd_lock);
 204         req = desc->bd_req;
 205         LASSERT(desc->bd_md_count > 0);
 206         desc->bd_md_count--;
 207
 208         if (ev->type != LNET_EVENT_UNLINK && ev->status == 0) {
 209                 desc->bd_nob_transferred += ev->mlength;
 210                 desc->bd_sender = ev->sender;
 211         } else {
 212                 /* start reconnect and resend if network error hit */
 213                 spin_lock(&req->rq_lock);
 214                 req->rq_net_err = 1;
 215                 spin_unlock(&req->rq_lock);
 216         }
 217
 218         if (ev->status != 0)
 219                 desc->bd_failure = 1;
 220
 221         /* NB don't unlock till after wakeup; desc can disappear under us
 222          * otherwise */
 223         if (desc->bd_md_count == 0)
 224                 ptlrpc_client_wake_req(desc->bd_req);
 225
 226         spin_unlock(&desc->bd_lock);
 227         EXIT;
 228 }
 229
 230 /*
 231  * We will have percpt request history list for ptlrpc service in upcoming
 232  * patches because we don't want to be serialized by current per-service
 233  * history operations. So we require history ID can (somehow) show arriving
 234  * order w/o grabbing global lock, and user can sort them in userspace.
 235  *
 236  * This is how we generate history ID for ptlrpc_request:
 237  * ----------------------------------------------------
 238  * |  32 bits  |  16 bits  | (16 - X)bits  |  X bits  |
 239  * ----------------------------------------------------
 240  * |  seconds  | usec / 16 |   sequence    | CPT id   |
 241  * ----------------------------------------------------
 242  *
 243  * it might not be precise but should be good enough.
 244  */
 245
 246 #define REQS_CPT_BITS(svcpt)    ((svcpt)->scp_service->srv_cpt_bits)
 247
 248 #define REQS_SEC_SHIFT          32
 249 #define REQS_USEC_SHIFT         16
 250 #define REQS_SEQ_SHIFT(svcpt)   REQS_CPT_BITS(svcpt)
 251
 252 static void ptlrpc_req_add_history(struct ptlrpc_service_part *svcpt,
 253                                    struct ptlrpc_request *req)
 254 {
 255         __u64   sec = req->rq_arrival_time.tv_sec;
 256         __u32   usec = req->rq_arrival_time.tv_usec >> 4; /* usec / 16 */
 257         __u64   new_seq;
 258
 259         /* set sequence ID for request and add it to history list,
 260          * it must be called with hold svcpt::scp_lock */
 261
 262         new_seq = (sec << REQS_SEC_SHIFT) |
 263                   (usec << REQS_USEC_SHIFT) |
 264                   (svcpt->scp_cpt < 0 ? 0 : svcpt->scp_cpt);
 265
 266         if (new_seq > svcpt->scp_hist_seq) {
 267                 /* This handles the initial case of scp_hist_seq == 0 or
 268                  * we just jumped into a new time window */
 269                 svcpt->scp_hist_seq = new_seq;
 270         } else {
 271                 LASSERT(REQS_SEQ_SHIFT(svcpt) < REQS_USEC_SHIFT);
 272                 /* NB: increase sequence number in current usec bucket,
 273                  * however, it's possible that we used up all bits for
 274                  * sequence and jumped into the next usec bucket (future time),
 275                  * then we hope there will be less RPCs per bucket at some
 276                  * point, and sequence will catch up again */
 277                 svcpt->scp_hist_seq += (1U << REQS_SEQ_SHIFT(svcpt));
 278                 new_seq = svcpt->scp_hist_seq;
 279         }
 280
 281         req->rq_history_seq = new_seq;
 282
 283         list_add_tail(&req->rq_history_list, &svcpt->scp_hist_reqs);
 284 }
 285
 286 /*
 287  * Server's incoming request callback
 288  */
 289 void request_in_callback(lnet_event_t *ev)
 290 {
 291         struct ptlrpc_cb_id               *cbid = ev->md.user_ptr;
 292         struct ptlrpc_request_buffer_desc *rqbd = cbid->cbid_arg;
 293         struct ptlrpc_service_part        *svcpt = rqbd->rqbd_svcpt;
 294         struct ptlrpc_service             *service = svcpt->scp_service;
 295         struct ptlrpc_request             *req;
 296         ENTRY;
 297
 298         LASSERT (ev->type == LNET_EVENT_PUT ||
 299                  ev->type == LNET_EVENT_UNLINK);
 300         LASSERT ((char *)ev->md.start >= rqbd->rqbd_buffer);
 301         LASSERT ((char *)ev->md.start + ev->offset + ev->mlength <=
 302                  rqbd->rqbd_buffer + service->srv_buf_size);
 303
 304         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 305                "event type %d, status %d, service %s\n",
 306                ev->type, ev->status, service->srv_name);
 307
 308         if (ev->unlinked) {
 309                 /* If this is the last request message to fit in the
 310                  * request buffer we can use the request object embedded in
 311                  * rqbd.  Note that if we failed to allocate a request,
 312                  * we'd have to re-post the rqbd, which we can't do in this
 313                  * context. */
 314                 req = &rqbd->rqbd_req;
 315                 memset(req, 0, sizeof (*req));
 316         } else {
 317                 LASSERT (ev->type == LNET_EVENT_PUT);
 318                 if (ev->status != 0) {
 319                         /* We moaned above already... */
 320                         return;
 321                 }
 322                 req = ptlrpc_request_cache_alloc(GFP_ATOMIC);
 323                 if (req == NULL) {
 324                         CERROR("Can't allocate incoming request descriptor: "
 325                                "Dropping %s RPC from %s\n",
 326                                service->srv_name,
 327                                libcfs_id2str(ev->initiator));
 328                         return;
 329                 }
 330         }
 331
 332         ptlrpc_srv_req_init(req);
 333         /* NB we ABSOLUTELY RELY on req being zeroed, so pointers are NULL,
 334          * flags are reset and scalars are zero.  We only set the message
 335          * size to non-zero if this was a successful receive. */
 336         req->rq_xid = ev->match_bits;
 337         req->rq_reqbuf = ev->md.start + ev->offset;
 338         if (ev->type == LNET_EVENT_PUT && ev->status == 0)
 339                 req->rq_reqdata_len = ev->mlength;
 340         do_gettimeofday(&req->rq_arrival_time);
 341         req->rq_peer = ev->initiator;
 342         req->rq_self = ev->target.nid;
 343         req->rq_rqbd = rqbd;
 344         req->rq_phase = RQ_PHASE_NEW;
 345         if (ev->type == LNET_EVENT_PUT)
 346                 CDEBUG(D_INFO, "incoming req@%p x"LPU64" msgsize %u\n",
 347                        req, req->rq_xid, ev->mlength);
 348
 349         CDEBUG(D_RPCTRACE, "peer: %s\n", libcfs_id2str(req->rq_peer));
 350
 351         spin_lock(&svcpt->scp_lock);
 352
 353         ptlrpc_req_add_history(svcpt, req);
 354
 355         if (ev->unlinked) {
 356                 svcpt->scp_nrqbds_posted--;
 357                 CDEBUG(D_INFO, "Buffer complete: %d buffers still posted\n",
 358                        svcpt->scp_nrqbds_posted);
 359
 360                 /* Normally, don't complain about 0 buffers posted; LNET won't
 361                  * drop incoming reqs since we set the portal lazy */
 362                 if (test_req_buffer_pressure &&
 363                     ev->type != LNET_EVENT_UNLINK &&
 364                     svcpt->scp_nrqbds_posted == 0)
 365                         CWARN("All %s request buffers busy\n",
 366                               service->srv_name);
 367
 368                 /* req takes over the network's ref on rqbd */
 369         } else {
 370                 /* req takes a ref on rqbd */
 371                 rqbd->rqbd_refcount++;
 372         }
 373
 374         list_add_tail(&req->rq_list, &svcpt->scp_req_incoming);
 375         svcpt->scp_nreqs_incoming++;
 376
 377         /* NB everything can disappear under us once the request
 378          * has been queued and we unlock, so do the wake now... */
 379         wake_up(&svcpt->scp_waitq);
 380
 381         spin_unlock(&svcpt->scp_lock);
 382         EXIT;
 383 }
 384
 385 /*
 386  *  Server's outgoing reply callback
 387  */
 388 void reply_out_callback(lnet_event_t *ev)
 389 {
 390         struct ptlrpc_cb_id       *cbid = ev->md.user_ptr;
 391         struct ptlrpc_reply_state *rs = cbid->cbid_arg;
 392         struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
 393         ENTRY;
 394
 395         LASSERT (ev->type == LNET_EVENT_SEND ||
 396                  ev->type == LNET_EVENT_ACK ||
 397                  ev->type == LNET_EVENT_UNLINK);
 398
 399         if (!rs->rs_difficult) {
 400                 /* 'Easy' replies have no further processing so I drop the
 401                  * net's ref on 'rs' */
 402                 LASSERT (ev->unlinked);
 403                 ptlrpc_rs_decref(rs);
 404                 EXIT;
 405                 return;
 406         }
 407
 408         LASSERT (rs->rs_on_net);
 409
 410         if (ev->unlinked) {
 411                 /* Last network callback. The net's ref on 'rs' stays put
 412                  * until ptlrpc_handle_rs() is done with it */
 413                 spin_lock(&svcpt->scp_rep_lock);
 414                 spin_lock(&rs->rs_lock);
 415
 416                 rs->rs_on_net = 0;
 417                 if (!rs->rs_no_ack ||
 418                     rs->rs_transno <=
 419                     rs->rs_export->exp_obd->obd_last_committed)
 420                         ptlrpc_schedule_difficult_reply(rs);
 421
 422                 spin_unlock(&rs->rs_lock);
 423                 spin_unlock(&svcpt->scp_rep_lock);
 424         }
 425         EXIT;
 426 }
 427
 428 #ifdef HAVE_SERVER_SUPPORT
 429 /*
 430  * Server's bulk completion callback
 431  */
 432 void server_bulk_callback (lnet_event_t *ev)
 433 {
 434         struct ptlrpc_cb_id     *cbid = ev->md.user_ptr;
 435         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 436         ENTRY;
 437
 438         LASSERT(ev->type == LNET_EVENT_SEND ||
 439                 ev->type == LNET_EVENT_UNLINK ||
 440                 (desc->bd_type == BULK_PUT_SOURCE &&
 441                  ev->type == LNET_EVENT_ACK) ||
 442                 (desc->bd_type == BULK_GET_SINK &&
 443                  ev->type == LNET_EVENT_REPLY));
 444
 445         CDEBUG((ev->status == 0) ? D_NET : D_ERROR,
 446                "event type %d, status %d, desc %p\n",
 447                ev->type, ev->status, desc);
 448
 449         spin_lock(&desc->bd_lock);
 450
 451         LASSERT(desc->bd_md_count > 0);
 452
 453         if ((ev->type == LNET_EVENT_ACK ||
 454              ev->type == LNET_EVENT_REPLY) &&
 455             ev->status == 0) {
 456                 /* We heard back from the peer, so even if we get this
 457                  * before the SENT event (oh yes we can), we know we
 458                  * read/wrote the peer buffer and how much... */
 459                 desc->bd_nob_transferred += ev->mlength;
 460                 desc->bd_sender = ev->sender;
 461         }
 462
 463         if (ev->status != 0)
 464                 desc->bd_failure = 1;
 465
 466         if (ev->unlinked) {
 467                 desc->bd_md_count--;
 468                 /* This is the last callback no matter what... */
 469                 if (desc->bd_md_count == 0)
 470                         wake_up(&desc->bd_waitq);
 471         }
 472
 473         spin_unlock(&desc->bd_lock);
 474         EXIT;
 475 }
 476 #endif
 477
 478 static void ptlrpc_master_callback(lnet_event_t *ev)
 479 {
 480         struct ptlrpc_cb_id *cbid = ev->md.user_ptr;
 481         void (*callback)(lnet_event_t *ev) = cbid->cbid_fn;
 482
 483         /* Honestly, it's best to find out early. */
 484         LASSERT (cbid->cbid_arg != LP_POISON);
 485         LASSERT (callback == request_out_callback ||
 486                  callback == reply_in_callback ||
 487                  callback == client_bulk_callback ||
 488                  callback == request_in_callback ||
 489                  callback == reply_out_callback
 490 #ifdef HAVE_SERVER_SUPPORT
 491                  || callback == server_bulk_callback
 492 #endif
 493                  );
 494
 495         callback (ev);
 496 }
 497
 498 int ptlrpc_uuid_to_peer (struct obd_uuid *uuid,
 499                          lnet_process_id_t *peer, lnet_nid_t *self)
 500 {
 501         int               best_dist = 0;
 502         __u32             best_order = 0;
 503         int               count = 0;
 504         int               rc = -ENOENT;
 505         int               portals_compatibility;
 506         int               dist;
 507         __u32             order;
 508         lnet_nid_t        dst_nid;
 509         lnet_nid_t        src_nid;
 510
 511         portals_compatibility = LNetCtl(IOC_LIBCFS_PORTALS_COMPATIBILITY, NULL);
 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                 dist = LNetDist(dst_nid, &src_nid, &order);
 518                 if (dist < 0)
 519                         continue;
 520
 521                 if (dist == 0) {                /* local! use loopback LND */
 522                         peer->nid = *self = LNET_MKNID(LNET_MKNET(LOLND, 0), 0);
 523                         rc = 0;
 524                         break;
 525                 }
 526
 527                 if (rc < 0 ||
 528                     dist < best_dist ||
 529                     (dist == best_dist && order < best_order)) {
 530                         best_dist = dist;
 531                         best_order = order;
 532
 533                         if (portals_compatibility > 1) {
 534                                 /* Strong portals compatibility: Zero the nid's
 535                                  * NET, so if I'm reading new config logs, or
 536                                  * getting configured by (new) lconf I can
 537                                  * still talk to old servers. */
 538                                 dst_nid = LNET_MKNID(0, LNET_NIDADDR(dst_nid));
 539                                 src_nid = LNET_MKNID(0, LNET_NIDADDR(src_nid));
 540                         }
 541                         peer->nid = dst_nid;
 542                         *self = src_nid;
 543                         rc = 0;
 544                 }
 545         }
 546
 547         CDEBUG(D_NET,"%s->%s\n", uuid->uuid, libcfs_id2str(*peer));
 548         return rc;
 549 }
 550
 551 void ptlrpc_ni_fini(void)
 552 {
 553         wait_queue_head_t         waitq;
 554         struct l_wait_info  lwi;
 555         int                 rc;
 556         int                 retries;
 557
 558         /* Wait for the event queue to become idle since there may still be
 559          * messages in flight with pending events (i.e. the fire-and-forget
 560          * messages == client requests and "non-difficult" server
 561          * replies */
 562
 563         for (retries = 0;; retries++) {
 564                 rc = LNetEQFree(ptlrpc_eq_h);
 565                 switch (rc) {
 566                 default:
 567                         LBUG();
 568
 569                 case 0:
 570                         LNetNIFini();
 571                         return;
 572
 573                 case -EBUSY:
 574                         if (retries != 0)
 575                                 CWARN("Event queue still busy\n");
 576
 577                         /* Wait for a bit */
 578                         init_waitqueue_head(&waitq);
 579                         lwi = LWI_TIMEOUT(cfs_time_seconds(2), NULL, NULL);
 580                         l_wait_event(waitq, 0, &lwi);
 581                         break;
 582                 }
 583         }
 584         /* notreached */
 585 }
 586
 587 lnet_pid_t ptl_get_pid(void)
 588 {
 589         return LNET_PID_LUSTRE;
 590 }
 591
 592 int ptlrpc_ni_init(void)
 593 {
 594         int              rc;
 595         lnet_pid_t       pid;
 596
 597         pid = ptl_get_pid();
 598         CDEBUG(D_NET, "My pid is: %x\n", pid);
 599
 600         /* We're not passing any limits yet... */
 601         rc = LNetNIInit(pid);
 602         if (rc < 0) {
 603                 CDEBUG (D_NET, "Can't init network interface: %d\n", rc);
 604                 return rc;
 605         }
 606
 607         /* CAVEAT EMPTOR: how we process portals events is _radically_
 608          * different depending on... */
 609         /* kernel LNet calls our master callback when there are new event,
 610          * because we are guaranteed to get every event via callback,
 611          * so we just set EQ size to 0 to avoid overhread of serializing
 612          * enqueue/dequeue operations in LNet. */
 613         rc = LNetEQAlloc(0, ptlrpc_master_callback, &ptlrpc_eq_h);
 614         if (rc == 0)
 615                 return 0;
 616
 617         CERROR ("Failed to allocate event queue: %d\n", rc);
 618         LNetNIFini();
 619
 620         return rc;
 621 }
 622
 623
 624 int ptlrpc_init_portals(void)
 625 {
 626         int   rc = ptlrpc_ni_init();
 627
 628         if (rc != 0) {
 629                 CERROR("network initialisation failed\n");
 630                 return rc;
 631         }
 632         rc = ptlrpcd_addref();
 633         if (rc == 0)
 634                 return 0;
 635
 636         CERROR("rpcd initialisation failed\n");
 637         ptlrpc_ni_fini();
 638         return rc;
 639 }
 640
 641 void ptlrpc_exit_portals(void)
 642 {
 643         ptlrpcd_decref();
 644         ptlrpc_ni_fini();
 645 }