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  */
  31
  32 #define DEBUG_SUBSYSTEM S_RPC
  33
  34 #include <libcfs/libcfs.h>
  35 #include <linux/kernel.h>
  36 #include <linux/delay.h>
  37 #include <obd_class.h>
  38 #include <lustre_net.h>
  39 #include <lustre_sec.h>
  40 #include "ptlrpc_internal.h"
  41
  42 lnet_handler_t ptlrpc_handler;
  43 struct percpu_ref ptlrpc_pending;
  44
  45 /*
  46  *  Client's outgoing request callback
  47  */
  48 void request_out_callback(struct lnet_event *ev)
  49 {
  50         struct ptlrpc_cb_id   *cbid = ev->md_user_ptr;
  51         struct ptlrpc_request *req = cbid->cbid_arg;
  52         bool                   wakeup = false;
  53         ENTRY;
  54
  55         LASSERT(ev->type == LNET_EVENT_SEND || ev->type == LNET_EVENT_UNLINK);
  56         LASSERT(ev->unlinked);
  57
  58         DEBUG_REQ(D_NET, req, "type %d, status %d", ev->type, ev->status);
  59
  60         /* Do not update imp_next_ping for connection request */
  61         if (lustre_msg_get_opc(req->rq_reqmsg) !=
  62             req->rq_import->imp_connect_op)
  63                 ptlrpc_pinger_sending_on_import(req->rq_import);
  64
  65         sptlrpc_request_out_callback(req);
  66
  67         spin_lock(&req->rq_lock);
  68         req->rq_real_sent = ktime_get_real_seconds();
  69         req->rq_req_unlinked = 1;
  70         /* reply_in_callback happened before request_out_callback? */
  71         if (req->rq_reply_unlinked)
  72                 wakeup = true;
  73
  74         if (ev->type == LNET_EVENT_UNLINK || ev->status != 0) {
  75                 /* Failed send: make it seem like the reply timed out, just
  76                  * like failing sends in client.c does currently...  */
  77                 req->rq_net_err = 1;
  78                 wakeup = true;
  79         }
  80
  81         if (wakeup)
  82                 ptlrpc_client_wake_req(req);
  83
  84         spin_unlock(&req->rq_lock);
  85
  86         ptlrpc_req_finished(req);
  87         EXIT;
  88 }
  89
  90 /*
  91  * Client's incoming reply callback
  92  */
  93 void reply_in_callback(struct lnet_event *ev)
  94 {
  95         struct ptlrpc_cb_id   *cbid = ev->md_user_ptr;
  96         struct ptlrpc_request *req = cbid->cbid_arg;
  97         ENTRY;
  98
  99         DEBUG_REQ(D_NET, req, "type %d, status %d", ev->type, ev->status);
 100
 101         LASSERT(ev->type == LNET_EVENT_PUT || ev->type == LNET_EVENT_UNLINK);
 102         LASSERT(ev->md_start == req->rq_repbuf);
 103         LASSERT(ev->offset + ev->mlength <= req->rq_repbuf_len);
 104         /* We've set LNET_MD_MANAGE_REMOTE for all outgoing requests
 105          * for adaptive timeouts' early reply.
 106          */
 107         LASSERT((ev->md_options & LNET_MD_MANAGE_REMOTE) != 0);
 108
 109         spin_lock(&req->rq_lock);
 110
 111         req->rq_receiving_reply = 0;
 112         req->rq_early = 0;
 113         if (ev->unlinked)
 114                 req->rq_reply_unlinked = 1;
 115
 116         if (ev->status)
 117                 goto out_wake;
 118
 119         if (ev->type == LNET_EVENT_UNLINK) {
 120                 LASSERT(ev->unlinked);
 121                 DEBUG_REQ(D_NET, req, "unlink");
 122                 goto out_wake;
 123         }
 124
 125         if (ev->mlength < ev->rlength ) {
 126                 CDEBUG(D_RPCTRACE, "truncate req %p rpc %d - %d+%d\n", req,
 127                        req->rq_replen, ev->rlength, ev->offset);
 128                 req->rq_reply_truncated = 1;
 129                 req->rq_replied = 1;
 130                 req->rq_status = -EOVERFLOW;
 131                 req->rq_nob_received = ev->rlength + ev->offset;
 132                 goto out_wake;
 133         }
 134
 135         if ((ev->offset == 0) &&
 136             ((lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT))) {
 137                 /* Early reply */
 138                 DEBUG_REQ(D_ADAPTTO, req,
 139                           "Early reply received, mlen=%u offset=%d replen=%d replied=%d unlinked=%d",
 140                           ev->mlength, ev->offset,
 141                           req->rq_replen, req->rq_replied, ev->unlinked);
 142
 143                 req->rq_early_count++; /* number received, client side */
 144
 145                 /* already got the real reply or buffers are already unlinked */
 146                 if (req->rq_replied ||
 147                     req->rq_reply_unlinked == 1)
 148                         goto out_wake;
 149
 150                 req->rq_early = 1;
 151                 req->rq_reply_off = ev->offset;
 152                 req->rq_nob_received = ev->mlength;
 153                 /* And we're still receiving */
 154                 req->rq_receiving_reply = 1;
 155         } else {
 156                 /* Real reply */
 157                 req->rq_rep_swab_mask = 0;
 158                 req->rq_replied = 1;
 159                 /* Got reply, no resend required */
 160                 req->rq_resend = 0;
 161                 req->rq_reply_off = ev->offset;
 162                 req->rq_nob_received = ev->mlength;
 163                 /* LNetMDUnlink can't be called under the LNET_LOCK,
 164                    so we must unlink in ptlrpc_unregister_reply */
 165                 DEBUG_REQ(D_INFO, req,
 166                           "reply in flags=%x mlen=%u offset=%d replen=%d",
 167                           lustre_msg_get_flags(req->rq_reqmsg),
 168                           ev->mlength, ev->offset, req->rq_replen);
 169         }
 170
 171         if (lustre_msg_get_opc(req->rq_reqmsg) != OBD_PING)
 172                 req->rq_import->imp_last_reply_time = ktime_get_real_seconds();
 173
 174         if (req->rq_xid > req->rq_import->imp_highest_replied_xid)
 175                 req->rq_import->imp_highest_replied_xid = req->rq_xid;
 176
 177 out_wake:
 178         /* NB don't unlock till after wakeup; req can disappear under us
 179          * since we don't have our own ref */
 180         ptlrpc_client_wake_req(req);
 181         spin_unlock(&req->rq_lock);
 182         EXIT;
 183 }
 184
 185 /*
 186  * Client's bulk has been written/read
 187  */
 188 void client_bulk_callback(struct lnet_event *ev)
 189 {
 190         struct ptlrpc_cb_id     *cbid = ev->md_user_ptr;
 191         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 192         struct ptlrpc_request   *req;
 193         ENTRY;
 194
 195         LASSERT((ptlrpc_is_bulk_put_sink(desc->bd_type) &&
 196                  ev->type == LNET_EVENT_PUT) ||
 197                 (ptlrpc_is_bulk_get_source(desc->bd_type) &&
 198                  ev->type == LNET_EVENT_GET) ||
 199                 ev->type == LNET_EVENT_UNLINK);
 200         LASSERT(ev->unlinked);
 201
 202         if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB, CFS_FAIL_ONCE))
 203                 ev->status = -EIO;
 204
 205         if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2,CFS_FAIL_ONCE))
 206                 ev->status = -EIO;
 207
 208         CDEBUG_LIMIT((ev->status == 0) ? D_NET : D_ERROR,
 209                      "event type %d, status %d, desc %p\n",
 210                      ev->type, ev->status, desc);
 211
 212         spin_lock(&desc->bd_lock);
 213         req = desc->bd_req;
 214         LASSERT(desc->bd_refs > 0);
 215         desc->bd_refs--;
 216
 217         if (ev->type != LNET_EVENT_UNLINK && ev->status == 0) {
 218                 desc->bd_nob_transferred += ev->mlength;
 219                 desc->bd_sender = ev->sender;
 220         } else {
 221                 /* start reconnect and resend if network error hit */
 222                 spin_lock(&req->rq_lock);
 223                 req->rq_net_err = 1;
 224                 spin_unlock(&req->rq_lock);
 225                 desc->bd_failure = 1;
 226         }
 227
 228
 229         /* NB don't unlock till after wakeup; desc can disappear under us
 230          * otherwise */
 231         if (desc->bd_refs == 0)
 232                 ptlrpc_client_wake_req(desc->bd_req);
 233
 234         spin_unlock(&desc->bd_lock);
 235         EXIT;
 236 }
 237
 238 /*
 239  * We will have percpt request history list for ptlrpc service in upcoming
 240  * patches because we don't want to be serialized by current per-service
 241  * history operations. So we require history ID can (somehow) show arriving
 242  * order w/o grabbing global lock, and user can sort them in userspace.
 243  *
 244  * This is how we generate history ID for ptlrpc_request:
 245  * ----------------------------------------------------
 246  * |  32 bits  |  16 bits  | (16 - X)bits  |  X bits  |
 247  * ----------------------------------------------------
 248  * |  seconds  | usec / 16 |   sequence    | CPT id   |
 249  * ----------------------------------------------------
 250  *
 251  * it might not be precise but should be good enough.
 252  */
 253
 254 #define REQS_CPT_BITS(svcpt)    ((svcpt)->scp_service->srv_cpt_bits)
 255
 256 #define REQS_SEC_SHIFT          32
 257 #define REQS_USEC_SHIFT         16
 258 #define REQS_SEQ_SHIFT(svcpt)   REQS_CPT_BITS(svcpt)
 259
 260 static void ptlrpc_req_add_history(struct ptlrpc_service_part *svcpt,
 261                                    struct ptlrpc_request *req)
 262 {
 263         u64 sec = req->rq_arrival_time.tv_sec;
 264         u32 usec = req->rq_arrival_time.tv_nsec / NSEC_PER_USEC / 16; /* usec / 16 */
 265         u64 new_seq;
 266
 267         /* set sequence ID for request and add it to history list,
 268          * it must be called with hold svcpt::scp_lock */
 269
 270         new_seq = (sec << REQS_SEC_SHIFT) |
 271                   (usec << REQS_USEC_SHIFT) |
 272                   (svcpt->scp_cpt < 0 ? 0 : svcpt->scp_cpt);
 273
 274         if (new_seq > svcpt->scp_hist_seq) {
 275                 /* This handles the initial case of scp_hist_seq == 0 or
 276                  * we just jumped into a new time window */
 277                 svcpt->scp_hist_seq = new_seq;
 278         } else {
 279                 LASSERT(REQS_SEQ_SHIFT(svcpt) < REQS_USEC_SHIFT);
 280                 /* NB: increase sequence number in current usec bucket,
 281                  * however, it's possible that we used up all bits for
 282                  * sequence and jumped into the next usec bucket (future time),
 283                  * then we hope there will be less RPCs per bucket at some
 284                  * point, and sequence will catch up again */
 285                 svcpt->scp_hist_seq += (1U << REQS_SEQ_SHIFT(svcpt));
 286                 new_seq = svcpt->scp_hist_seq;
 287         }
 288
 289         req->rq_history_seq = new_seq;
 290
 291         list_add_tail(&req->rq_history_list, &svcpt->scp_hist_reqs);
 292 }
 293
 294 /*
 295  * Server's incoming request callback
 296  */
 297 void request_in_callback(struct lnet_event *ev)
 298 {
 299         struct ptlrpc_cb_id               *cbid = ev->md_user_ptr;
 300         struct ptlrpc_request_buffer_desc *rqbd = cbid->cbid_arg;
 301         struct ptlrpc_service_part        *svcpt = rqbd->rqbd_svcpt;
 302         struct ptlrpc_service             *service = svcpt->scp_service;
 303         struct ptlrpc_request             *req;
 304         ENTRY;
 305
 306         LASSERT(ev->type == LNET_EVENT_PUT ||
 307                 ev->type == LNET_EVENT_UNLINK);
 308         LASSERT((char *)ev->md_start >= rqbd->rqbd_buffer);
 309         LASSERT((char *)ev->md_start + ev->offset + ev->mlength <=
 310                 rqbd->rqbd_buffer + service->srv_buf_size);
 311
 312         CDEBUG_LIMIT((ev->status == 0) ? D_NET : D_ERROR,
 313                      "event type %d, status %d, service %s\n",
 314                      ev->type, ev->status, service->srv_name);
 315
 316         if (ev->unlinked) {
 317                 /* If this is the last request message to fit in the
 318                  * request buffer we can use the request object embedded in
 319                  * rqbd.  Note that if we failed to allocate a request,
 320                  * we'd have to re-post the rqbd, which we can't do in this
 321                  * context.
 322                  */
 323                 req = &rqbd->rqbd_req;
 324                 memset(req, 0, sizeof(*req));
 325         } else {
 326                 LASSERT(ev->type == LNET_EVENT_PUT);
 327                 if (ev->status != 0) /* We moaned above already... */
 328                         return;
 329                 req = ptlrpc_request_cache_alloc(GFP_ATOMIC);
 330                 if (req == NULL) {
 331                         CERROR("Can't allocate incoming request descriptor: Dropping %s RPC from %s\n",
 332                                 service->srv_name,
 333                                 libcfs_idstr(&ev->initiator));
 334                         return;
 335                 }
 336         }
 337
 338         ptlrpc_srv_req_init(req);
 339         /* NB we ABSOLUTELY RELY on req being zeroed, so pointers are NULL,
 340          * flags are reset and scalars are zero.  We only set the message
 341          * size to non-zero if this was a successful receive. */
 342         req->rq_xid = ev->match_bits;
 343         req->rq_reqbuf = ev->md_start + ev->offset;
 344         if (ev->type == LNET_EVENT_PUT && ev->status == 0)
 345                 req->rq_reqdata_len = ev->mlength;
 346         ktime_get_real_ts64(&req->rq_arrival_time);
 347         /* Multi-Rail: keep track of both initiator and source NID. */
 348         req->rq_peer = ev->initiator;
 349         req->rq_source = ev->source;
 350         req->rq_self = ev->target.nid;
 351         req->rq_rqbd = rqbd;
 352         req->rq_phase = RQ_PHASE_NEW;
 353         if (ev->type == LNET_EVENT_PUT)
 354                 CDEBUG(D_INFO, "incoming req@%p x%llu msgsize %u\n",
 355                        req, req->rq_xid, ev->mlength);
 356
 357         CDEBUG(D_RPCTRACE, "peer: %s (source: %s)\n",
 358                 libcfs_idstr(&req->rq_peer), libcfs_idstr(&req->rq_source));
 359
 360         spin_lock(&svcpt->scp_lock);
 361
 362         ptlrpc_req_add_history(svcpt, req);
 363
 364         if (ev->unlinked) {
 365                 svcpt->scp_nrqbds_posted--;
 366                 CDEBUG(D_INFO, "Buffer complete: %d buffers still posted\n",
 367                        svcpt->scp_nrqbds_posted);
 368
 369                 /* Normally, don't complain about 0 buffers posted; LNET won't
 370                  * drop incoming reqs since we set the portal lazy */
 371                 if (test_req_buffer_pressure &&
 372                     ev->type != LNET_EVENT_UNLINK &&
 373                     svcpt->scp_nrqbds_posted == 0)
 374                         CWARN("All %s request buffers busy\n",
 375                               service->srv_name);
 376
 377                 /* req takes over the network's ref on rqbd */
 378         } else {
 379                 /* req takes a ref on rqbd */
 380                 rqbd->rqbd_refcount++;
 381         }
 382
 383         list_add_tail(&req->rq_list, &svcpt->scp_req_incoming);
 384         svcpt->scp_nreqs_incoming++;
 385
 386         /* NB everything can disappear under us once the request
 387          * has been queued and we unlock, so do the wake now... */
 388         wake_up(&svcpt->scp_waitq);
 389
 390         spin_unlock(&svcpt->scp_lock);
 391         EXIT;
 392 }
 393
 394 /*
 395  *  Server's outgoing reply callback
 396  */
 397 void reply_out_callback(struct lnet_event *ev)
 398 {
 399         struct ptlrpc_cb_id       *cbid = ev->md_user_ptr;
 400         struct ptlrpc_reply_state *rs = cbid->cbid_arg;
 401         struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
 402         bool need_schedule = false;
 403
 404         ENTRY;
 405
 406         LASSERT(ev->type == LNET_EVENT_SEND ||
 407                 ev->type == LNET_EVENT_ACK ||
 408                 ev->type == LNET_EVENT_UNLINK);
 409
 410         if (!rs->rs_difficult) {
 411                 /* 'Easy' replies have no further processing so I drop the
 412                  * net's ref on 'rs'
 413                  */
 414                 LASSERT(ev->unlinked);
 415                 ptlrpc_rs_decref(rs);
 416                 EXIT;
 417                 return;
 418         }
 419
 420         if (ev->type == LNET_EVENT_SEND) {
 421                 spin_lock(&rs->rs_lock);
 422                 rs->rs_sent = 1;
 423                 /* If transaction was committed before the SEND, and the ACK
 424                  * is lost, then we need to schedule so ptlrpc_hr can unlink
 425                  * the MD.
 426                  */
 427                 if (rs->rs_handled)
 428                         need_schedule = true;
 429                 spin_unlock(&rs->rs_lock);
 430         }
 431
 432         if (ev->unlinked || need_schedule) {
 433                 LASSERT(rs->rs_sent);
 434
 435                 /* Last network callback. The net's ref on 'rs' stays put
 436                  * until ptlrpc_handle_rs() is done with it
 437                  */
 438                 spin_lock(&svcpt->scp_rep_lock);
 439                 spin_lock(&rs->rs_lock);
 440
 441                 rs->rs_unlinked = ev->unlinked;
 442                 if (!rs->rs_no_ack ||
 443                     rs->rs_transno <=
 444                     rs->rs_export->exp_obd->obd_last_committed ||
 445                     list_empty(&rs->rs_obd_list))
 446                         ptlrpc_schedule_difficult_reply(rs);
 447
 448                 spin_unlock(&rs->rs_lock);
 449                 spin_unlock(&svcpt->scp_rep_lock);
 450         }
 451         EXIT;
 452 }
 453
 454 #ifdef HAVE_SERVER_SUPPORT
 455 /*
 456  * Server's bulk completion callback
 457  */
 458 void server_bulk_callback(struct lnet_event *ev)
 459 {
 460         struct ptlrpc_cb_id     *cbid = ev->md_user_ptr;
 461         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 462         ENTRY;
 463
 464         LASSERT(ev->type == LNET_EVENT_SEND ||
 465                 ev->type == LNET_EVENT_UNLINK ||
 466                 (ptlrpc_is_bulk_put_source(desc->bd_type) &&
 467                  ev->type == LNET_EVENT_ACK) ||
 468                 (ptlrpc_is_bulk_get_sink(desc->bd_type) &&
 469                  ev->type == LNET_EVENT_REPLY));
 470
 471         CDEBUG_LIMIT((ev->status == 0) ? D_NET : D_ERROR,
 472                      "event type %d, status %d, desc %p\n",
 473                      ev->type, ev->status, desc);
 474
 475         spin_lock(&desc->bd_lock);
 476
 477         LASSERT(desc->bd_refs > 0);
 478
 479         if ((ev->type == LNET_EVENT_ACK ||
 480              ev->type == LNET_EVENT_REPLY) &&
 481             ev->status == 0) {
 482                 /* We heard back from the peer, so even if we get this
 483                  * before the SENT event (oh yes we can), we know we
 484                  * read/wrote the peer buffer and how much... */
 485                 desc->bd_nob_transferred += ev->mlength;
 486                 desc->bd_sender = ev->sender;
 487         }
 488
 489         if (ev->status != 0)
 490                 desc->bd_failure = 1;
 491
 492         if (ev->unlinked) {
 493                 desc->bd_refs--;
 494                 /* This is the last callback no matter what... */
 495                 if (desc->bd_refs == 0)
 496                         wake_up(&desc->bd_waitq);
 497         }
 498
 499         spin_unlock(&desc->bd_lock);
 500         EXIT;
 501 }
 502 #endif
 503
 504 static void ptlrpc_master_callback(struct lnet_event *ev)
 505 {
 506         struct ptlrpc_cb_id *cbid = ev->md_user_ptr;
 507         void (*callback)(struct lnet_event *ev) = cbid->cbid_fn;
 508
 509         /* Honestly, it's best to find out early. */
 510         LASSERT(cbid->cbid_arg != LP_POISON);
 511         LASSERT(callback == request_out_callback ||
 512                 callback == reply_in_callback ||
 513                 callback == client_bulk_callback ||
 514                 callback == request_in_callback ||
 515                 callback == reply_out_callback
 516 #ifdef HAVE_SERVER_SUPPORT
 517                 || callback == server_bulk_callback
 518 #endif
 519                 );
 520
 521         callback(ev);
 522         if (ev->unlinked)
 523                 percpu_ref_put(&ptlrpc_pending);
 524 }
 525
 526 int ptlrpc_uuid_to_peer(struct obd_uuid *uuid,
 527                         struct lnet_processid *peer,
 528                         struct lnet_nid *self,
 529                         u32 refnet)
 530 {
 531         int best_dist = 0;
 532         __u32 best_order = 0;
 533         int count = 0;
 534         int rc = -ENOENT;
 535         int dist;
 536         __u32 order;
 537         struct lnet_nid dst_nid;
 538         struct lnet_nid src_nid;
 539
 540         peer->pid = LNET_PID_LUSTRE;
 541
 542         /* Choose the matching UUID that's closest */
 543         while (lustre_uuid_to_peer(uuid->uuid, &dst_nid, count++) == 0) {
 544                 if (refnet != LNET_NET_ANY &&
 545                     LNET_NID_NET(&dst_nid) != refnet)
 546                         continue;
 547
 548                 dist = LNetDist(&dst_nid, &src_nid, &order);
 549                 if (dist < 0)
 550                         continue;
 551
 552                 if (dist == 0) {                /* local! use loopback LND */
 553                         lnet_nid4_to_nid(LNET_NID_LO_0, self);
 554                         peer->nid = *self;
 555                         rc = 0;
 556                         break;
 557                 }
 558
 559                 if (rc < 0 ||
 560                     dist < best_dist ||
 561                     (dist == best_dist && order < best_order)) {
 562                         best_dist = dist;
 563                         best_order = order;
 564
 565                         peer->nid = dst_nid;
 566                         *self = src_nid;
 567                         rc = 0;
 568                 }
 569         }
 570
 571         CDEBUG(D_NET, "%s->%s\n", uuid->uuid, libcfs_idstr(peer));
 572         return rc;
 573 }
 574
 575 static struct completion ptlrpc_done;
 576
 577 static void ptlrpc_release(struct percpu_ref *ref)
 578 {
 579         complete(&ptlrpc_done);
 580 }
 581
 582 static void ptlrpc_ni_fini(void)
 583 {
 584         /* Wait for the event queue to become idle since there may still be
 585          * messages in flight with pending events (i.e. the fire-and-forget
 586          * messages == client requests and "non-difficult" server
 587          * replies */
 588
 589         init_completion(&ptlrpc_done);
 590         percpu_ref_kill(&ptlrpc_pending);
 591         wait_for_completion(&ptlrpc_done);
 592
 593         lnet_assert_handler_unused(ptlrpc_handler);
 594         LNetNIFini();
 595 }
 596
 597 lnet_pid_t ptl_get_pid(void)
 598 {
 599         return LNET_PID_LUSTRE;
 600 }
 601
 602 int ptlrpc_ni_init(void)
 603 {
 604         int rc;
 605         lnet_pid_t pid;
 606
 607         pid = ptl_get_pid();
 608         CDEBUG(D_NET, "My pid is: %x\n", pid);
 609
 610         /* We're not passing any limits yet... */
 611         rc = LNetNIInit(pid);
 612         if (rc < 0) {
 613                 CDEBUG(D_NET, "ptlrpc: Can't init network interface: rc = %d\n",
 614                        rc);
 615                 return rc;
 616         }
 617
 618         rc = percpu_ref_init(&ptlrpc_pending, ptlrpc_release, 0, GFP_KERNEL);
 619         if (rc) {
 620                 CERROR("ptlrpc: Can't init percpu refcount: rc = %d\n", rc);
 621                 return rc;
 622         }
 623         /* CAVEAT EMPTOR: how we process portals events is _radically_
 624          * different depending on...
 625          */
 626         /* kernel LNet calls our master callback when there are new event,
 627          * because we are guaranteed to get every event via callback,
 628          * so we just set EQ size to 0 to avoid overhread of serializing
 629          * enqueue/dequeue operations in LNet. */
 630         ptlrpc_handler = ptlrpc_master_callback;
 631         return 0;
 632 }
 633
 634 int ptlrpc_init_portals(void)
 635 {
 636         int   rc = ptlrpc_ni_init();
 637
 638         if (rc != 0) {
 639                 CERROR("network initialisation failed\n");
 640                 return rc;
 641         }
 642         rc = ptlrpcd_addref();
 643         if (rc == 0)
 644                 return 0;
 645
 646         CERROR("rpcd initialisation failed\n");
 647         ptlrpc_ni_fini();
 648         return rc;
 649 }
 650
 651 void ptlrpc_exit_portals(void)
 652 {
 653         ptlrpcd_decref();
 654         ptlrpc_ni_fini();
 655 }