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         if (unlikely(lustre_msg_get_opc(req->rq_reqmsg) == cfs_fail_val &&
  59                      CFS_FAIL_CHECK_RESET(OBD_FAIL_NET_ERROR_RPC,
  60                                           OBD_FAIL_OSP_PRECREATE_PAUSE |
  61                                           CFS_FAIL_ONCE)))
  62                 ev->status = -ECONNABORTED;
  63
  64         DEBUG_REQ(D_NET, req, "type %d, status %d", ev->type, ev->status);
  65
  66         /* Do not update imp_next_ping for connection request */
  67         if (lustre_msg_get_opc(req->rq_reqmsg) !=
  68             req->rq_import->imp_connect_op)
  69                 ptlrpc_pinger_sending_on_import(req->rq_import);
  70
  71         sptlrpc_request_out_callback(req);
  72
  73         spin_lock(&req->rq_lock);
  74         req->rq_real_sent = ktime_get_real_seconds();
  75         req->rq_req_unlinked = 1;
  76         /* reply_in_callback happened before request_out_callback? */
  77         if (req->rq_reply_unlinked)
  78                 wakeup = true;
  79
  80         if (ev->type == LNET_EVENT_UNLINK || ev->status != 0) {
  81                 /* Failed send: make it seem like the reply timed out, just
  82                  * like failing sends in client.c does currently...  */
  83                 req->rq_net_err = 1;
  84                 wakeup = true;
  85         }
  86
  87         if (wakeup)
  88                 ptlrpc_client_wake_req(req);
  89
  90         spin_unlock(&req->rq_lock);
  91
  92         ptlrpc_req_finished(req);
  93         EXIT;
  94 }
  95
  96 /*
  97  * Client's incoming reply callback
  98  */
  99 void reply_in_callback(struct lnet_event *ev)
 100 {
 101         struct ptlrpc_cb_id   *cbid = ev->md_user_ptr;
 102         struct ptlrpc_request *req = cbid->cbid_arg;
 103         ENTRY;
 104
 105         DEBUG_REQ(D_NET, req, "type %d, status %d", ev->type, ev->status);
 106
 107         LASSERT(ev->type == LNET_EVENT_PUT || ev->type == LNET_EVENT_UNLINK);
 108         LASSERT(ev->md_start == req->rq_repbuf);
 109         LASSERT(ev->offset + ev->mlength <= req->rq_repbuf_len);
 110         /* We've set LNET_MD_MANAGE_REMOTE for all outgoing requests
 111          * for adaptive timeouts' early reply.
 112          */
 113         LASSERT((ev->md_options & LNET_MD_MANAGE_REMOTE) != 0);
 114
 115         spin_lock(&req->rq_lock);
 116
 117         req->rq_receiving_reply = 0;
 118         req->rq_early = 0;
 119         if (ev->unlinked)
 120                 req->rq_reply_unlinked = 1;
 121
 122         if (ev->status)
 123                 goto out_wake;
 124
 125         if (ev->type == LNET_EVENT_UNLINK) {
 126                 LASSERT(ev->unlinked);
 127                 DEBUG_REQ(D_NET, req, "unlink");
 128                 goto out_wake;
 129         }
 130
 131         if (ev->mlength < ev->rlength ) {
 132                 CDEBUG(D_RPCTRACE, "truncate req %p rpc %d - %d+%d\n", req,
 133                        req->rq_replen, ev->rlength, ev->offset);
 134                 req->rq_reply_truncated = 1;
 135                 req->rq_replied = 1;
 136                 req->rq_status = -EOVERFLOW;
 137                 req->rq_nob_received = ev->rlength + ev->offset;
 138                 goto out_wake;
 139         }
 140
 141         if ((ev->offset == 0) &&
 142             ((lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT))) {
 143                 /* Early reply */
 144                 DEBUG_REQ(D_ADAPTTO, req,
 145                           "Early reply received, mlen=%u offset=%d replen=%d replied=%d unlinked=%d",
 146                           ev->mlength, ev->offset,
 147                           req->rq_replen, req->rq_replied, ev->unlinked);
 148
 149                 req->rq_early_count++; /* number received, client side */
 150
 151                 /* already got the real reply or buffers are already unlinked */
 152                 if (req->rq_replied ||
 153                     req->rq_reply_unlinked == 1)
 154                         goto out_wake;
 155
 156                 req->rq_early = 1;
 157                 req->rq_reply_off = ev->offset;
 158                 req->rq_nob_received = ev->mlength;
 159                 /* And we're still receiving */
 160                 req->rq_receiving_reply = 1;
 161         } else {
 162                 /* Real reply */
 163                 req->rq_rep_swab_mask = 0;
 164                 req->rq_replied = 1;
 165                 /* Got reply, no resend required */
 166                 req->rq_resend = 0;
 167                 req->rq_reply_off = ev->offset;
 168                 req->rq_nob_received = ev->mlength;
 169                 /* LNetMDUnlink can't be called under the LNET_LOCK,
 170                    so we must unlink in ptlrpc_unregister_reply */
 171                 DEBUG_REQ(D_INFO, req,
 172                           "reply in flags=%x mlen=%u offset=%d replen=%d",
 173                           lustre_msg_get_flags(req->rq_reqmsg),
 174                           ev->mlength, ev->offset, req->rq_replen);
 175         }
 176
 177         if (lustre_msg_get_opc(req->rq_reqmsg) != OBD_PING)
 178                 req->rq_import->imp_last_reply_time = ktime_get_real_seconds();
 179
 180 out_wake:
 181         /* NB don't unlock till after wakeup; req can disappear under us
 182          * since we don't have our own ref */
 183         ptlrpc_client_wake_req(req);
 184         spin_unlock(&req->rq_lock);
 185         EXIT;
 186 }
 187
 188 /*
 189  * Client's bulk has been written/read
 190  */
 191 void client_bulk_callback(struct lnet_event *ev)
 192 {
 193         struct ptlrpc_cb_id     *cbid = ev->md_user_ptr;
 194         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 195         struct ptlrpc_request   *req;
 196         ENTRY;
 197
 198         LASSERT((ptlrpc_is_bulk_put_sink(desc->bd_type) &&
 199                  ev->type == LNET_EVENT_PUT) ||
 200                 (ptlrpc_is_bulk_get_source(desc->bd_type) &&
 201                  ev->type == LNET_EVENT_GET) ||
 202                 ev->type == LNET_EVENT_UNLINK);
 203         LASSERT(ev->unlinked);
 204
 205         if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB, CFS_FAIL_ONCE))
 206                 ev->status = -EIO;
 207
 208         if (CFS_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2,CFS_FAIL_ONCE))
 209                 ev->status = -EIO;
 210
 211         CDEBUG_LIMIT((ev->status == 0) ? D_NET : D_ERROR,
 212                      "event type %d, status %d, desc %p\n",
 213                      ev->type, ev->status, desc);
 214
 215         spin_lock(&desc->bd_lock);
 216         req = desc->bd_req;
 217         LASSERT(desc->bd_refs > 0);
 218         desc->bd_refs--;
 219
 220         if (ev->type != LNET_EVENT_UNLINK && ev->status == 0) {
 221                 desc->bd_nob_transferred += ev->mlength;
 222                 desc->bd_sender = ev->sender;
 223         } else {
 224                 /* start reconnect and resend if network error hit */
 225                 spin_lock(&req->rq_lock);
 226                 req->rq_net_err = 1;
 227                 spin_unlock(&req->rq_lock);
 228         }
 229
 230         if (ev->status != 0)
 231                 desc->bd_failure = 1;
 232
 233         /* NB don't unlock till after wakeup; desc can disappear under us
 234          * otherwise */
 235         if (desc->bd_refs == 0)
 236                 ptlrpc_client_wake_req(desc->bd_req);
 237
 238         spin_unlock(&desc->bd_lock);
 239         EXIT;
 240 }
 241
 242 /*
 243  * We will have percpt request history list for ptlrpc service in upcoming
 244  * patches because we don't want to be serialized by current per-service
 245  * history operations. So we require history ID can (somehow) show arriving
 246  * order w/o grabbing global lock, and user can sort them in userspace.
 247  *
 248  * This is how we generate history ID for ptlrpc_request:
 249  * ----------------------------------------------------
 250  * |  32 bits  |  16 bits  | (16 - X)bits  |  X bits  |
 251  * ----------------------------------------------------
 252  * |  seconds  | usec / 16 |   sequence    | CPT id   |
 253  * ----------------------------------------------------
 254  *
 255  * it might not be precise but should be good enough.
 256  */
 257
 258 #define REQS_CPT_BITS(svcpt)    ((svcpt)->scp_service->srv_cpt_bits)
 259
 260 #define REQS_SEC_SHIFT          32
 261 #define REQS_USEC_SHIFT         16
 262 #define REQS_SEQ_SHIFT(svcpt)   REQS_CPT_BITS(svcpt)
 263
 264 static void ptlrpc_req_add_history(struct ptlrpc_service_part *svcpt,
 265                                    struct ptlrpc_request *req)
 266 {
 267         u64 sec = req->rq_arrival_time.tv_sec;
 268         u32 usec = req->rq_arrival_time.tv_nsec / NSEC_PER_USEC / 16; /* usec / 16 */
 269         u64 new_seq;
 270
 271         /* set sequence ID for request and add it to history list,
 272          * it must be called with hold svcpt::scp_lock */
 273
 274         new_seq = (sec << REQS_SEC_SHIFT) |
 275                   (usec << REQS_USEC_SHIFT) |
 276                   (svcpt->scp_cpt < 0 ? 0 : svcpt->scp_cpt);
 277
 278         if (new_seq > svcpt->scp_hist_seq) {
 279                 /* This handles the initial case of scp_hist_seq == 0 or
 280                  * we just jumped into a new time window */
 281                 svcpt->scp_hist_seq = new_seq;
 282         } else {
 283                 LASSERT(REQS_SEQ_SHIFT(svcpt) < REQS_USEC_SHIFT);
 284                 /* NB: increase sequence number in current usec bucket,
 285                  * however, it's possible that we used up all bits for
 286                  * sequence and jumped into the next usec bucket (future time),
 287                  * then we hope there will be less RPCs per bucket at some
 288                  * point, and sequence will catch up again */
 289                 svcpt->scp_hist_seq += (1U << REQS_SEQ_SHIFT(svcpt));
 290                 new_seq = svcpt->scp_hist_seq;
 291         }
 292
 293         req->rq_history_seq = new_seq;
 294
 295         list_add_tail(&req->rq_history_list, &svcpt->scp_hist_reqs);
 296 }
 297
 298 /*
 299  * Server's incoming request callback
 300  */
 301 void request_in_callback(struct lnet_event *ev)
 302 {
 303         struct ptlrpc_cb_id               *cbid = ev->md_user_ptr;
 304         struct ptlrpc_request_buffer_desc *rqbd = cbid->cbid_arg;
 305         struct ptlrpc_service_part        *svcpt = rqbd->rqbd_svcpt;
 306         struct ptlrpc_service             *service = svcpt->scp_service;
 307         struct ptlrpc_request             *req;
 308         ENTRY;
 309
 310         LASSERT(ev->type == LNET_EVENT_PUT ||
 311                 ev->type == LNET_EVENT_UNLINK);
 312         LASSERT((char *)ev->md_start >= rqbd->rqbd_buffer);
 313         LASSERT((char *)ev->md_start + ev->offset + ev->mlength <=
 314                 rqbd->rqbd_buffer + service->srv_buf_size);
 315
 316         CDEBUG_LIMIT((ev->status == 0) ? D_NET : D_ERROR,
 317                      "event type %d, status %d, service %s\n",
 318                      ev->type, ev->status, service->srv_name);
 319
 320         if (ev->unlinked) {
 321                 /* If this is the last request message to fit in the
 322                  * request buffer we can use the request object embedded in
 323                  * rqbd.  Note that if we failed to allocate a request,
 324                  * we'd have to re-post the rqbd, which we can't do in this
 325                  * context.
 326                  */
 327                 req = &rqbd->rqbd_req;
 328                 memset(req, 0, sizeof(*req));
 329         } else {
 330                 LASSERT(ev->type == LNET_EVENT_PUT);
 331                 if (ev->status != 0) /* We moaned above already... */
 332                         return;
 333                 req = ptlrpc_request_cache_alloc(GFP_ATOMIC);
 334                 if (req == NULL) {
 335                         CERROR("Can't allocate incoming request descriptor: "
 336                                "Dropping %s RPC from %s\n",
 337                                service->srv_name,
 338                                libcfs_id2str(ev->initiator));
 339                         return;
 340                 }
 341         }
 342
 343         ptlrpc_srv_req_init(req);
 344         /* NB we ABSOLUTELY RELY on req being zeroed, so pointers are NULL,
 345          * flags are reset and scalars are zero.  We only set the message
 346          * size to non-zero if this was a successful receive. */
 347         req->rq_xid = ev->match_bits;
 348         req->rq_reqbuf = ev->md_start + ev->offset;
 349         if (ev->type == LNET_EVENT_PUT && ev->status == 0)
 350                 req->rq_reqdata_len = ev->mlength;
 351         ktime_get_real_ts64(&req->rq_arrival_time);
 352         /* Multi-Rail: keep track of both initiator and source NID. */
 353         req->rq_peer = ev->initiator;
 354         req->rq_source = ev->source;
 355         req->rq_self = ev->target.nid;
 356         req->rq_rqbd = rqbd;
 357         req->rq_phase = RQ_PHASE_NEW;
 358         if (ev->type == LNET_EVENT_PUT)
 359                 CDEBUG(D_INFO, "incoming req@%p x%llu msgsize %u\n",
 360                        req, req->rq_xid, ev->mlength);
 361
 362         CDEBUG(D_RPCTRACE, "peer: %s (source: %s)\n",
 363                 libcfs_id2str(req->rq_peer), libcfs_id2str(req->rq_source));
 364
 365         spin_lock(&svcpt->scp_lock);
 366
 367         ptlrpc_req_add_history(svcpt, req);
 368
 369         if (ev->unlinked) {
 370                 svcpt->scp_nrqbds_posted--;
 371                 CDEBUG(D_INFO, "Buffer complete: %d buffers still posted\n",
 372                        svcpt->scp_nrqbds_posted);
 373
 374                 /* Normally, don't complain about 0 buffers posted; LNET won't
 375                  * drop incoming reqs since we set the portal lazy */
 376                 if (test_req_buffer_pressure &&
 377                     ev->type != LNET_EVENT_UNLINK &&
 378                     svcpt->scp_nrqbds_posted == 0)
 379                         CWARN("All %s request buffers busy\n",
 380                               service->srv_name);
 381
 382                 /* req takes over the network's ref on rqbd */
 383         } else {
 384                 /* req takes a ref on rqbd */
 385                 rqbd->rqbd_refcount++;
 386         }
 387
 388         list_add_tail(&req->rq_list, &svcpt->scp_req_incoming);
 389         svcpt->scp_nreqs_incoming++;
 390
 391         /* NB everything can disappear under us once the request
 392          * has been queued and we unlock, so do the wake now... */
 393         wake_up(&svcpt->scp_waitq);
 394
 395         spin_unlock(&svcpt->scp_lock);
 396         EXIT;
 397 }
 398
 399 /*
 400  *  Server's outgoing reply callback
 401  */
 402 void reply_out_callback(struct lnet_event *ev)
 403 {
 404         struct ptlrpc_cb_id       *cbid = ev->md_user_ptr;
 405         struct ptlrpc_reply_state *rs = cbid->cbid_arg;
 406         struct ptlrpc_service_part *svcpt = rs->rs_svcpt;
 407         ENTRY;
 408
 409         LASSERT (ev->type == LNET_EVENT_SEND ||
 410                  ev->type == LNET_EVENT_ACK ||
 411                  ev->type == LNET_EVENT_UNLINK);
 412
 413         if (!rs->rs_difficult) {
 414                 /* 'Easy' replies have no further processing so I drop the
 415                  * net's ref on 'rs' */
 416                 LASSERT (ev->unlinked);
 417                 ptlrpc_rs_decref(rs);
 418                 EXIT;
 419                 return;
 420         }
 421
 422         LASSERT (rs->rs_on_net);
 423
 424         if (ev->unlinked) {
 425                 /* Last network callback. The net's ref on 'rs' stays put
 426                  * until ptlrpc_handle_rs() is done with it */
 427                 spin_lock(&svcpt->scp_rep_lock);
 428                 spin_lock(&rs->rs_lock);
 429
 430                 rs->rs_on_net = 0;
 431                 if (!rs->rs_no_ack ||
 432                     rs->rs_transno <=
 433                     rs->rs_export->exp_obd->obd_last_committed ||
 434                     list_empty(&rs->rs_obd_list))
 435                         ptlrpc_schedule_difficult_reply(rs);
 436
 437                 spin_unlock(&rs->rs_lock);
 438                 spin_unlock(&svcpt->scp_rep_lock);
 439         }
 440         EXIT;
 441 }
 442
 443 #ifdef HAVE_SERVER_SUPPORT
 444 /*
 445  * Server's bulk completion callback
 446  */
 447 void server_bulk_callback(struct lnet_event *ev)
 448 {
 449         struct ptlrpc_cb_id     *cbid = ev->md_user_ptr;
 450         struct ptlrpc_bulk_desc *desc = cbid->cbid_arg;
 451         ENTRY;
 452
 453         LASSERT(ev->type == LNET_EVENT_SEND ||
 454                 ev->type == LNET_EVENT_UNLINK ||
 455                 (ptlrpc_is_bulk_put_source(desc->bd_type) &&
 456                  ev->type == LNET_EVENT_ACK) ||
 457                 (ptlrpc_is_bulk_get_sink(desc->bd_type) &&
 458                  ev->type == LNET_EVENT_REPLY));
 459
 460         CDEBUG_LIMIT((ev->status == 0) ? D_NET : D_ERROR,
 461                      "event type %d, status %d, desc %p\n",
 462                      ev->type, ev->status, desc);
 463
 464         spin_lock(&desc->bd_lock);
 465
 466         LASSERT(desc->bd_refs > 0);
 467
 468         if ((ev->type == LNET_EVENT_ACK ||
 469              ev->type == LNET_EVENT_REPLY) &&
 470             ev->status == 0) {
 471                 /* We heard back from the peer, so even if we get this
 472                  * before the SENT event (oh yes we can), we know we
 473                  * read/wrote the peer buffer and how much... */
 474                 desc->bd_nob_transferred += ev->mlength;
 475                 desc->bd_sender = ev->sender;
 476         }
 477
 478         if (ev->status != 0)
 479                 desc->bd_failure = 1;
 480
 481         if (ev->unlinked) {
 482                 desc->bd_refs--;
 483                 /* This is the last callback no matter what... */
 484                 if (desc->bd_refs == 0)
 485                         wake_up(&desc->bd_waitq);
 486         }
 487
 488         spin_unlock(&desc->bd_lock);
 489         EXIT;
 490 }
 491 #endif
 492
 493 static void ptlrpc_master_callback(struct lnet_event *ev)
 494 {
 495         struct ptlrpc_cb_id *cbid = ev->md_user_ptr;
 496         void (*callback)(struct lnet_event *ev) = cbid->cbid_fn;
 497
 498         /* Honestly, it's best to find out early. */
 499         LASSERT(cbid->cbid_arg != LP_POISON);
 500         LASSERT(callback == request_out_callback ||
 501                 callback == reply_in_callback ||
 502                 callback == client_bulk_callback ||
 503                 callback == request_in_callback ||
 504                 callback == reply_out_callback
 505 #ifdef HAVE_SERVER_SUPPORT
 506                 || callback == server_bulk_callback
 507 #endif
 508                 );
 509
 510         callback(ev);
 511         if (ev->unlinked)
 512                 percpu_ref_put(&ptlrpc_pending);
 513 }
 514
 515 int ptlrpc_uuid_to_peer(struct obd_uuid *uuid,
 516                         struct lnet_process_id *peer, lnet_nid_t *self)
 517 {
 518         int best_dist = 0;
 519         __u32 best_order = 0;
 520         int count = 0;
 521         int rc = -ENOENT;
 522         int dist;
 523         __u32 order;
 524         lnet_nid_t dst_nid;
 525         lnet_nid_t src_nid;
 526
 527         peer->pid = LNET_PID_LUSTRE;
 528
 529         /* Choose the matching UUID that's closest */
 530         while (lustre_uuid_to_peer(uuid->uuid, &dst_nid, count++) == 0) {
 531                 if (peer->nid != LNET_NID_ANY && LNET_NIDADDR(peer->nid) == 0 &&
 532                     LNET_NIDNET(dst_nid) != LNET_NIDNET(peer->nid))
 533                         continue;
 534
 535                 dist = LNetDist(dst_nid, &src_nid, &order);
 536                 if (dist < 0)
 537                         continue;
 538
 539                 if (dist == 0) {                /* local! use loopback LND */
 540                         peer->nid = *self = LNET_NID_LO_0;
 541                         rc = 0;
 542                         break;
 543                 }
 544
 545                 if (rc < 0 ||
 546                     dist < best_dist ||
 547                     (dist == best_dist && order < best_order)) {
 548                         best_dist = dist;
 549                         best_order = order;
 550
 551                         peer->nid = dst_nid;
 552                         *self = src_nid;
 553                         rc = 0;
 554                 }
 555         }
 556
 557         CDEBUG(D_NET, "%s->%s\n", uuid->uuid, libcfs_id2str(*peer));
 558         return rc;
 559 }
 560
 561 static struct completion ptlrpc_done;
 562
 563 static void ptlrpc_release(struct percpu_ref *ref)
 564 {
 565         complete(&ptlrpc_done);
 566 }
 567
 568 static void ptlrpc_ni_fini(void)
 569 {
 570         /* Wait for the event queue to become idle since there may still be
 571          * messages in flight with pending events (i.e. the fire-and-forget
 572          * messages == client requests and "non-difficult" server
 573          * replies */
 574
 575         init_completion(&ptlrpc_done);
 576         percpu_ref_kill(&ptlrpc_pending);
 577         wait_for_completion(&ptlrpc_done);
 578
 579         lnet_assert_handler_unused(ptlrpc_handler);
 580         LNetNIFini();
 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, "ptlrpc: Can't init network interface: rc = %d\n",
 600                        rc);
 601                 return rc;
 602         }
 603
 604         rc = percpu_ref_init(&ptlrpc_pending, ptlrpc_release, 0, GFP_KERNEL);
 605         if (rc) {
 606                 CERROR("ptlrpc: Can't init percpu refcount: rc = %d\n", rc);
 607                 return rc;
 608         }
 609         /* CAVEAT EMPTOR: how we process portals events is _radically_
 610          * different depending on...
 611          */
 612         /* kernel LNet calls our master callback when there are new event,
 613          * because we are guaranteed to get every event via callback,
 614          * so we just set EQ size to 0 to avoid overhread of serializing
 615          * enqueue/dequeue operations in LNet. */
 616         ptlrpc_handler = ptlrpc_master_callback;
 617         return 0;
 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 }