lustre/ptlrpc/niobuf.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (c) 2002, 2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of the Lustre file system, http://www.lustre.org
   7  *   Lustre is a trademark of Cluster File Systems, Inc.
   8  *
   9  *   You may have signed or agreed to another license before downloading
  10  *   this software.  If so, you are bound by the terms and conditions
  11  *   of that agreement, and the following does not apply to you.  See the
  12  *   LICENSE file included with this distribution for more information.
  13  *
  14  *   If you did not agree to a different license, then this copy of Lustre
  15  *   is open source software; you can redistribute it and/or modify it
  16  *   under the terms of version 2 of the GNU General Public License as
  17  *   published by the Free Software Foundation.
  18  *
  19  *   In either case, Lustre is distributed in the hope that it will be
  20  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  21  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *   license text for more details.
  23  *
  24  */
  25
  26 #define DEBUG_SUBSYSTEM S_RPC
  27 #ifndef __KERNEL__
  28 #include <liblustre.h>
  29 #endif
  30 #include <obd_support.h>
  31 #include <lustre_net.h>
  32 #include <lustre_lib.h>
  33 #include <obd.h>
  34 #include "ptlrpc_internal.h"
  35
  36 static int ptl_send_buf (lnet_handle_md_t *mdh, void *base, int len,
  37                          lnet_ack_req_t ack, struct ptlrpc_cb_id *cbid,
  38                          struct ptlrpc_connection *conn, int portal, __u64 xid)
  39 {
  40         int              rc;
  41         lnet_md_t         md;
  42         ENTRY;
  43
  44         LASSERT (portal != 0);
  45         LASSERT (conn != NULL);
  46         CDEBUG (D_INFO, "conn=%p id %s\n", conn, libcfs_id2str(conn->c_peer));
  47         md.start     = base;
  48         md.length    = len;
  49         md.threshold = (ack == LNET_ACK_REQ) ? 2 : 1;
  50         md.options   = PTLRPC_MD_OPTIONS;
  51         md.user_ptr  = cbid;
  52         md.eq_handle = ptlrpc_eq_h;
  53
  54         if (unlikely(ack == LNET_ACK_REQ &&
  55                      OBD_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_ACK, OBD_FAIL_ONCE))){
  56                 /* don't ask for the ack to simulate failing client */
  57                 ack = LNET_NOACK_REQ;
  58         }
  59
  60         rc = LNetMDBind (md, LNET_UNLINK, mdh);
  61         if (unlikely(rc != 0)) {
  62                 CERROR ("LNetMDBind failed: %d\n", rc);
  63                 LASSERT (rc == -ENOMEM);
  64                 RETURN (-ENOMEM);
  65         }
  66
  67         CDEBUG(D_NET, "Sending %d bytes to portal %d, xid "LPD64"\n",
  68                len, portal, xid);
  69
  70         rc = LNetPut (conn->c_self, *mdh, ack,
  71                       conn->c_peer, portal, xid, 0, 0);
  72         if (unlikely(rc != 0)) {
  73                 int rc2;
  74                 /* We're going to get an UNLINK event when I unlink below,
  75                  * which will complete just like any other failed send, so
  76                  * I fall through and return success here! */
  77                 CERROR("LNetPut(%s, %d, "LPD64") failed: %d\n",
  78                        libcfs_id2str(conn->c_peer), portal, xid, rc);
  79                 rc2 = LNetMDUnlink(*mdh);
  80                 LASSERTF(rc2 == 0, "rc2 = %d\n", rc2);
  81         }
  82
  83         RETURN (0);
  84 }
  85
  86 int ptlrpc_start_bulk_transfer (struct ptlrpc_bulk_desc *desc)
  87 {
  88         struct ptlrpc_connection *conn = desc->bd_export->exp_connection;
  89         int                       rc;
  90         int                       rc2;
  91         lnet_md_t                 md;
  92         __u64                     xid;
  93         ENTRY;
  94
  95         if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_BULK_PUT_NET))
  96                 RETURN(0);
  97
  98         /* NB no locking required until desc is on the network */
  99         LASSERT (!desc->bd_network_rw);
 100         LASSERT (desc->bd_type == BULK_PUT_SOURCE ||
 101                  desc->bd_type == BULK_GET_SINK);
 102         desc->bd_success = 0;
 103
 104         md.user_ptr = &desc->bd_cbid;
 105         md.eq_handle = ptlrpc_eq_h;
 106         md.threshold = 2; /* SENT and ACK/REPLY */
 107         md.options = PTLRPC_MD_OPTIONS;
 108         ptlrpc_fill_bulk_md(&md, desc);
 109
 110         LASSERT (desc->bd_cbid.cbid_fn == server_bulk_callback);
 111         LASSERT (desc->bd_cbid.cbid_arg == desc);
 112
 113         /* NB total length may be 0 for a read past EOF, so we send a 0
 114          * length bulk, since the client expects a bulk event. */
 115
 116         rc = LNetMDBind(md, LNET_UNLINK, &desc->bd_md_h);
 117         if (rc != 0) {
 118                 CERROR("LNetMDBind failed: %d\n", rc);
 119                 LASSERT (rc == -ENOMEM);
 120                 RETURN(-ENOMEM);
 121         }
 122
 123         /* Client's bulk and reply matchbits are the same */
 124         xid = desc->bd_req->rq_xid;
 125         CDEBUG(D_NET, "Transferring %u pages %u bytes via portal %d "
 126                "id %s xid "LPX64"\n", desc->bd_iov_count,
 127                desc->bd_nob, desc->bd_portal,
 128                libcfs_id2str(conn->c_peer), xid);
 129
 130         /* Network is about to get at the memory */
 131         desc->bd_network_rw = 1;
 132
 133         if (desc->bd_type == BULK_PUT_SOURCE)
 134                 rc = LNetPut (conn->c_self, desc->bd_md_h, LNET_ACK_REQ,
 135                               conn->c_peer, desc->bd_portal, xid, 0, 0);
 136         else
 137                 rc = LNetGet (conn->c_self, desc->bd_md_h,
 138                               conn->c_peer, desc->bd_portal, xid, 0);
 139
 140         if (rc != 0) {
 141                 /* Can't send, so we unlink the MD bound above.  The UNLINK
 142                  * event this creates will signal completion with failure,
 143                  * so we return SUCCESS here! */
 144                 CERROR("Transfer(%s, %d, "LPX64") failed: %d\n",
 145                        libcfs_id2str(conn->c_peer), desc->bd_portal, xid, rc);
 146                 rc2 = LNetMDUnlink(desc->bd_md_h);
 147                 LASSERT (rc2 == 0);
 148         }
 149
 150         RETURN(0);
 151 }
 152
 153 void ptlrpc_abort_bulk (struct ptlrpc_bulk_desc *desc)
 154 {
 155         /* Server side bulk abort. Idempotent. Not thread-safe (i.e. only
 156          * serialises with completion callback) */
 157         struct l_wait_info lwi;
 158         int                rc;
 159
 160         LASSERT (!in_interrupt ());             /* might sleep */
 161
 162         if (!ptlrpc_bulk_active(desc))          /* completed or */
 163                 return;                         /* never started */
 164
 165         /* Do not send any meaningful data over the wire for evicted clients */
 166         if (desc->bd_export && desc->bd_export->exp_failed)
 167                 ptl_rpc_wipe_bulk_pages(desc);
 168
 169         /* The unlink ensures the callback happens ASAP and is the last
 170          * one.  If it fails, it must be because completion just happened,
 171          * but we must still l_wait_event() in this case, to give liblustre
 172          * a chance to run server_bulk_callback()*/
 173
 174         LNetMDUnlink (desc->bd_md_h);
 175
 176         for (;;) {
 177                 /* Network access will complete in finite time but the HUGE
 178                  * timeout lets us CWARN for visibility of sluggish NALs */
 179                 lwi = LWI_TIMEOUT (cfs_time_seconds(300), NULL, NULL);
 180                 rc = l_wait_event(desc->bd_waitq,
 181                                   !ptlrpc_bulk_active(desc), &lwi);
 182                 if (rc == 0)
 183                         return;
 184
 185                 LASSERT(rc == -ETIMEDOUT);
 186                 CWARN("Unexpectedly long timeout: desc %p\n", desc);
 187         }
 188 }
 189
 190 int ptlrpc_register_bulk (struct ptlrpc_request *req)
 191 {
 192         struct ptlrpc_bulk_desc *desc = req->rq_bulk;
 193         lnet_process_id_t peer;
 194         int rc;
 195         int rc2;
 196         lnet_handle_me_t  me_h;
 197         lnet_md_t         md;
 198         ENTRY;
 199
 200         if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_BULK_GET_NET))
 201                 RETURN(0);
 202
 203         /* NB no locking required until desc is on the network */
 204         LASSERT (desc->bd_nob > 0);
 205         LASSERT (!desc->bd_network_rw);
 206         LASSERT (desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
 207         LASSERT (desc->bd_req != NULL);
 208         LASSERT (desc->bd_type == BULK_PUT_SINK ||
 209                  desc->bd_type == BULK_GET_SOURCE);
 210
 211         desc->bd_success = 0;
 212
 213         peer = desc->bd_import->imp_connection->c_peer;
 214
 215         md.user_ptr = &desc->bd_cbid;
 216         md.eq_handle = ptlrpc_eq_h;
 217         md.threshold = 1;                       /* PUT or GET */
 218         md.options = PTLRPC_MD_OPTIONS |
 219                      ((desc->bd_type == BULK_GET_SOURCE) ?
 220                       LNET_MD_OP_GET : LNET_MD_OP_PUT);
 221         ptlrpc_fill_bulk_md(&md, desc);
 222
 223         LASSERT (desc->bd_cbid.cbid_fn == client_bulk_callback);
 224         LASSERT (desc->bd_cbid.cbid_arg == desc);
 225
 226         /* XXX Registering the same xid on retried bulk makes my head
 227          * explode trying to understand how the original request's bulk
 228          * might interfere with the retried request -eeb */
 229         LASSERTF (!desc->bd_registered || req->rq_xid != desc->bd_last_xid,
 230                   "registered: %d  rq_xid: "LPU64" bd_last_xid: "LPU64"\n",
 231                   desc->bd_registered, req->rq_xid, desc->bd_last_xid);
 232         desc->bd_registered = 1;
 233         desc->bd_last_xid = req->rq_xid;
 234
 235         rc = LNetMEAttach(desc->bd_portal, peer,
 236                          req->rq_xid, 0, LNET_UNLINK, LNET_INS_AFTER, &me_h);
 237         if (rc != 0) {
 238                 CERROR("LNetMEAttach failed: %d\n", rc);
 239                 LASSERT (rc == -ENOMEM);
 240                 RETURN (-ENOMEM);
 241         }
 242
 243         /* About to let the network at it... */
 244         desc->bd_network_rw = 1;
 245         rc = LNetMDAttach(me_h, md, LNET_UNLINK, &desc->bd_md_h);
 246         if (rc != 0) {
 247                 CERROR("LNetMDAttach failed: %d\n", rc);
 248                 LASSERT (rc == -ENOMEM);
 249                 desc->bd_network_rw = 0;
 250                 rc2 = LNetMEUnlink (me_h);
 251                 LASSERT (rc2 == 0);
 252                 RETURN (-ENOMEM);
 253         }
 254
 255         CDEBUG(D_NET, "Setup bulk %s buffers: %u pages %u bytes, xid "LPX64", "
 256                "portal %u\n",
 257                desc->bd_type == BULK_GET_SOURCE ? "get-source" : "put-sink",
 258                desc->bd_iov_count, desc->bd_nob,
 259                req->rq_xid, desc->bd_portal);
 260         RETURN(0);
 261 }
 262
 263 void ptlrpc_unregister_bulk (struct ptlrpc_request *req)
 264 {
 265         /* Disconnect a bulk desc from the network. Idempotent. Not
 266          * thread-safe (i.e. only interlocks with completion callback). */
 267         struct ptlrpc_bulk_desc *desc = req->rq_bulk;
 268         cfs_waitq_t             *wq;
 269         struct l_wait_info       lwi;
 270         int                      rc;
 271
 272         LASSERT (!in_interrupt ());     /* might sleep */
 273
 274         if (!ptlrpc_bulk_active(desc))  /* completed or */
 275                 return;                 /* never registered */
 276
 277         LASSERT (desc->bd_req == req);  /* bd_req NULL until registered */
 278
 279         /* the unlink ensures the callback happens ASAP and is the last
 280          * one.  If it fails, it must be because completion just happened,
 281          * but we must still l_wait_event() in this case to give liblustre
 282          * a chance to run client_bulk_callback() */
 283
 284         LNetMDUnlink (desc->bd_md_h);
 285
 286         if (req->rq_set != NULL)
 287                 wq = &req->rq_set->set_waitq;
 288         else
 289                 wq = &req->rq_reply_waitq;
 290
 291         for (;;) {
 292                 /* Network access will complete in finite time but the HUGE
 293                  * timeout lets us CWARN for visibility of sluggish NALs */
 294                 lwi = LWI_TIMEOUT (cfs_time_seconds(300), NULL, NULL);
 295                 rc = l_wait_event(*wq, !ptlrpc_bulk_active(desc), &lwi);
 296                 if (rc == 0)
 297                         return;
 298
 299                 LASSERT (rc == -ETIMEDOUT);
 300                 DEBUG_REQ(D_WARNING,req,"Unexpectedly long timeout: desc %p",
 301                           desc);
 302         }
 303 }
 304
 305 int ptlrpc_send_reply (struct ptlrpc_request *req, int may_be_difficult)
 306 {
 307         struct ptlrpc_service     *svc = req->rq_rqbd->rqbd_service;
 308         struct ptlrpc_reply_state *rs = req->rq_reply_state;
 309         struct ptlrpc_connection  *conn;
 310         int                        rc;
 311
 312         /* We must already have a reply buffer (only ptlrpc_error() may be
 313          * called without one). The reply generated by sptlrpc layer (e.g.
 314          * error notify, etc.) might have NULL rq->reqmsg; Otherwise we must
 315          * have a request buffer which is either the actual (swabbed) incoming
 316          * request, or a saved copy if this is a req saved in
 317          * target_queue_final_reply().
 318          */
 319         LASSERT (req->rq_no_reply == 0);
 320         LASSERT (req->rq_reqbuf != NULL);
 321         LASSERT (rs != NULL);
 322         LASSERT (may_be_difficult || !rs->rs_difficult);
 323         LASSERT (req->rq_repmsg != NULL);
 324         LASSERT (req->rq_repmsg == rs->rs_msg);
 325         LASSERT (rs->rs_cb_id.cbid_fn == reply_out_callback);
 326         LASSERT (rs->rs_cb_id.cbid_arg == rs);
 327
 328         if (unlikely(req->rq_export && req->rq_export->exp_obd &&
 329                      req->rq_export->exp_obd->obd_fail)) {
 330                 /* Failed obd's only send ENODEV */
 331                 req->rq_type = PTL_RPC_MSG_ERR;
 332                 req->rq_status = -ENODEV;
 333                 CDEBUG(D_HA, "sending ENODEV from failed obd %d\n",
 334                        req->rq_export->exp_obd->obd_minor);
 335         }
 336
 337         if (req->rq_type != PTL_RPC_MSG_ERR)
 338                 req->rq_type = PTL_RPC_MSG_REPLY;
 339
 340         lustre_msg_set_type(req->rq_repmsg, req->rq_type);
 341         lustre_msg_set_status(req->rq_repmsg, req->rq_status);
 342         lustre_msg_set_opc(req->rq_repmsg,
 343                 req->rq_reqmsg ? lustre_msg_get_opc(req->rq_reqmsg) : 0);
 344
 345         target_pack_pool_reply(req);
 346
 347         if (req->rq_export == NULL || req->rq_export->exp_connection == NULL)
 348                 conn = ptlrpc_get_connection(req->rq_peer, req->rq_self, NULL);
 349         else
 350                 conn = ptlrpc_connection_addref(req->rq_export->exp_connection);
 351
 352         if (unlikely(conn == NULL)) {
 353                 CERROR("not replying on NULL connection\n"); /* bug 9635 */
 354                 return -ENOTCONN;
 355         }
 356         atomic_inc (&svc->srv_outstanding_replies);
 357         ptlrpc_rs_addref(rs);                   /* +1 ref for the network */
 358
 359         rc = sptlrpc_svc_wrap_reply(req);
 360         if (unlikely(rc))
 361                 goto out;
 362
 363         rc = ptl_send_buf (&rs->rs_md_h, rs->rs_repbuf, rs->rs_repdata_len,
 364                            rs->rs_difficult ? LNET_ACK_REQ : LNET_NOACK_REQ,
 365                            &rs->rs_cb_id, conn,
 366                            svc->srv_rep_portal, req->rq_xid);
 367 out:
 368         if (unlikely(rc != 0)) {
 369                 atomic_dec (&svc->srv_outstanding_replies);
 370                 ptlrpc_rs_decref(rs);
 371         }
 372         ptlrpc_put_connection(conn);
 373         return rc;
 374 }
 375
 376 int ptlrpc_reply (struct ptlrpc_request *req)
 377 {
 378         if (req->rq_no_reply)
 379                 return 0;
 380         else
 381                 return (ptlrpc_send_reply(req, 0));
 382 }
 383
 384 int ptlrpc_send_error(struct ptlrpc_request *req, int may_be_difficult)
 385 {
 386         int rc;
 387         ENTRY;
 388
 389         if (req->rq_no_reply)
 390                 RETURN(0);
 391
 392         if (!req->rq_repmsg) {
 393                 rc = lustre_pack_reply(req, 1, NULL, NULL);
 394                 if (rc)
 395                         RETURN(rc);
 396         }
 397
 398         req->rq_type = PTL_RPC_MSG_ERR;
 399
 400         rc = ptlrpc_send_reply(req, may_be_difficult);
 401         RETURN(rc);
 402 }
 403
 404 int ptlrpc_error(struct ptlrpc_request *req)
 405 {
 406         return ptlrpc_send_error(req, 0);
 407 }
 408
 409 int ptl_send_rpc(struct ptlrpc_request *request, int noreply)
 410 {
 411         int rc;
 412         int rc2;
 413         struct ptlrpc_connection *connection;
 414         lnet_handle_me_t  reply_me_h;
 415         lnet_md_t         reply_md;
 416         struct obd_device *obd = request->rq_import->imp_obd;
 417         ENTRY;
 418
 419         if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_DROP_RPC))
 420                 RETURN(0);
 421
 422         LASSERT (request->rq_type == PTL_RPC_MSG_REQUEST);
 423
 424         /* If this is a re-transmit, we're required to have disengaged
 425          * cleanly from the previous attempt */
 426         LASSERT (!request->rq_receiving_reply);
 427
 428         if (request->rq_import->imp_obd &&
 429             request->rq_import->imp_obd->obd_fail) {
 430                 CDEBUG(D_HA, "muting rpc for failed imp obd %s\n",
 431                        request->rq_import->imp_obd->obd_name);
 432                 /* this prevents us from waiting in ptlrpc_queue_wait */
 433                 request->rq_err = 1;
 434                 RETURN(-ENODEV);
 435         }
 436
 437         connection = request->rq_import->imp_connection;
 438
 439         lustre_msg_set_handle(request->rq_reqmsg,
 440                               &request->rq_import->imp_remote_handle);
 441         lustre_msg_set_type(request->rq_reqmsg, PTL_RPC_MSG_REQUEST);
 442         lustre_msg_set_conn_cnt(request->rq_reqmsg,
 443                                 request->rq_import->imp_conn_cnt);
 444
 445         rc = sptlrpc_cli_wrap_request(request);
 446         if (rc)
 447                 RETURN(rc);
 448
 449         /* bulk register should be done after wrap_request() */
 450         if (request->rq_bulk != NULL) {
 451                 rc = ptlrpc_register_bulk (request);
 452                 if (rc != 0)
 453                         RETURN(rc);
 454         }
 455
 456         if (!noreply) {
 457                 LASSERT (request->rq_replen != 0);
 458                 if (request->rq_repbuf == NULL) {
 459                         rc = sptlrpc_cli_alloc_repbuf(request,
 460                                                       request->rq_replen);
 461                         if (rc)
 462                                 GOTO(cleanup_bulk, rc);
 463                 }
 464
 465                 rc = LNetMEAttach(request->rq_reply_portal,/*XXX FIXME bug 249*/
 466                                   connection->c_peer, request->rq_xid, 0,
 467                                   LNET_UNLINK, LNET_INS_AFTER, &reply_me_h);
 468                 if (rc != 0) {
 469                         CERROR("LNetMEAttach failed: %d\n", rc);
 470                         LASSERT (rc == -ENOMEM);
 471                         GOTO(cleanup_bulk, rc = -ENOMEM);
 472                 }
 473         }
 474
 475         spin_lock(&request->rq_lock);
 476         /* If the MD attach succeeds, there _will_ be a reply_in callback */
 477         request->rq_receiving_reply = !noreply;
 478         /* Clear any flags that may be present from previous sends. */
 479         request->rq_replied = 0;
 480         request->rq_err = 0;
 481         request->rq_timedout = 0;
 482         request->rq_net_err = 0;
 483         request->rq_resend = 0;
 484         request->rq_restart = 0;
 485         spin_unlock(&request->rq_lock);
 486
 487         if (!noreply) {
 488                 reply_md.start     = request->rq_repbuf;
 489                 reply_md.length    = request->rq_repbuf_len;
 490                 reply_md.threshold = 1;
 491                 reply_md.options   = PTLRPC_MD_OPTIONS | LNET_MD_OP_PUT;
 492                 reply_md.user_ptr  = &request->rq_reply_cbid;
 493                 reply_md.eq_handle = ptlrpc_eq_h;
 494
 495                 rc = LNetMDAttach(reply_me_h, reply_md, LNET_UNLINK,
 496                                  &request->rq_reply_md_h);
 497                 if (rc != 0) {
 498                         CERROR("LNetMDAttach failed: %d\n", rc);
 499                         LASSERT (rc == -ENOMEM);
 500                         spin_lock(&request->rq_lock);
 501                         /* ...but the MD attach didn't succeed... */
 502                         request->rq_receiving_reply = 0;
 503                         spin_unlock(&request->rq_lock);
 504                         GOTO(cleanup_me, rc -ENOMEM);
 505                 }
 506
 507                 CDEBUG(D_NET, "Setup reply buffer: %u bytes, xid "LPU64
 508                        ", portal %u\n",
 509                        request->rq_repbuf_len, request->rq_xid,
 510                        request->rq_reply_portal);
 511         }
 512
 513         /* add references on request for request_out_callback */
 514         ptlrpc_request_addref(request);
 515         if (obd->obd_svc_stats != NULL)
 516                 lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQACTIVE_CNTR,
 517                                     request->rq_import->imp_inflight.counter);
 518
 519         OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_DELAY_SEND, request->rq_timeout + 5);
 520
 521         request->rq_sent = cfs_time_current_sec();
 522         do_gettimeofday(&request->rq_arrival_time);
 523         ptlrpc_pinger_sending_on_import(request->rq_import);
 524         rc = ptl_send_buf(&request->rq_req_md_h,
 525                           request->rq_reqbuf, request->rq_reqdata_len,
 526                           LNET_NOACK_REQ, &request->rq_req_cbid,
 527                           connection,
 528                           request->rq_request_portal,
 529                           request->rq_xid);
 530         if (rc == 0) {
 531                 ptlrpc_lprocfs_rpc_sent(request);
 532                 RETURN(rc);
 533         }
 534
 535         ptlrpc_req_finished(request);
 536         if (noreply)
 537                 RETURN(rc);
 538         else
 539                 GOTO(cleanup_me, rc);
 540  cleanup_me:
 541         /* MEUnlink is safe; the PUT didn't even get off the ground, and
 542          * nobody apart from the PUT's target has the right nid+XID to
 543          * access the reply buffer. */
 544         rc2 = LNetMEUnlink(reply_me_h);
 545         LASSERT (rc2 == 0);
 546         /* UNLINKED callback called synchronously */
 547         LASSERT (!request->rq_receiving_reply);
 548
 549  cleanup_bulk:
 550         if (request->rq_bulk != NULL)
 551                 ptlrpc_unregister_bulk(request);
 552
 553         return rc;
 554 }
 555
 556 int ptlrpc_register_rqbd (struct ptlrpc_request_buffer_desc *rqbd)
 557 {
 558         struct ptlrpc_service   *service = rqbd->rqbd_service;
 559         static lnet_process_id_t  match_id = {LNET_NID_ANY, LNET_PID_ANY};
 560         int                      rc;
 561         lnet_md_t                 md;
 562         lnet_handle_me_t          me_h;
 563
 564         CDEBUG(D_NET, "LNetMEAttach: portal %d\n",
 565                service->srv_req_portal);
 566
 567         if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_RQBD))
 568                 return (-ENOMEM);
 569
 570         rc = LNetMEAttach(service->srv_req_portal,
 571                           match_id, 0, ~0, LNET_UNLINK, LNET_INS_AFTER, &me_h);
 572         if (rc != 0) {
 573                 CERROR("LNetMEAttach failed: %d\n", rc);
 574                 return (-ENOMEM);
 575         }
 576
 577         LASSERT(rqbd->rqbd_refcount == 0);
 578         rqbd->rqbd_refcount = 1;
 579
 580         md.start     = rqbd->rqbd_buffer;
 581         md.length    = service->srv_buf_size;
 582         md.max_size  = service->srv_max_req_size;
 583         md.threshold = LNET_MD_THRESH_INF;
 584         md.options   = PTLRPC_MD_OPTIONS | LNET_MD_OP_PUT | LNET_MD_MAX_SIZE;
 585         md.user_ptr  = &rqbd->rqbd_cbid;
 586         md.eq_handle = ptlrpc_eq_h;
 587
 588         rc = LNetMDAttach(me_h, md, LNET_UNLINK, &rqbd->rqbd_md_h);
 589         if (rc == 0)
 590                 return (0);
 591
 592         CERROR("LNetMDAttach failed: %d; \n", rc);
 593         LASSERT (rc == -ENOMEM);
 594         rc = LNetMEUnlink (me_h);
 595         LASSERT (rc == 0);
 596         rqbd->rqbd_refcount = 0;
 597
 598         return (-ENOMEM);
 599 }