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 Lustre, http://www.lustre.org.
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22
  23 #define DEBUG_SUBSYSTEM S_RPC
  24
  25 #include <linux/obd_support.h>
  26 #include <linux/lustre_net.h>
  27 #include <linux/lustre_lib.h>
  28 #include <linux/obd.h>
  29
  30 extern ptl_handle_eq_t request_out_eq, reply_in_eq, reply_out_eq,
  31         bulk_put_source_eq, bulk_put_sink_eq,
  32         bulk_get_source_eq, bulk_get_sink_eq;
  33
  34 static int ptl_send_buf(struct ptlrpc_request *request,
  35                         struct ptlrpc_connection *conn, int portal)
  36 {
  37         int rc;
  38         ptl_process_id_t remote_id;
  39         ptl_handle_md_t md_h;
  40
  41         LASSERT(conn);
  42
  43         request->rq_req_md.user_ptr = request;
  44
  45         switch (request->rq_type) {
  46         case PTL_RPC_MSG_REQUEST:
  47                 request->rq_reqmsg->type = HTON__u32(request->rq_type);
  48                 request->rq_req_md.start = request->rq_reqmsg;
  49                 request->rq_req_md.length = request->rq_reqlen;
  50                 request->rq_req_md.eventq = request_out_eq;
  51                 break;
  52         case PTL_RPC_MSG_ERR:
  53         case PTL_RPC_MSG_REPLY:
  54                 request->rq_repmsg->type = HTON__u32(request->rq_type);
  55                 request->rq_req_md.start = request->rq_repmsg;
  56                 request->rq_req_md.length = request->rq_replen;
  57                 request->rq_req_md.eventq = reply_out_eq;
  58                 break;
  59         default:
  60                 LBUG();
  61                 return -1; /* notreached */
  62         }
  63         request->rq_req_md.threshold = 1;
  64         request->rq_req_md.options = PTL_MD_OP_PUT;
  65         request->rq_req_md.user_ptr = request;
  66
  67         rc = PtlMDBind(conn->c_peer.peer_ni, request->rq_req_md, &md_h);
  68         if (rc != 0) {
  69                 CERROR("PtlMDBind failed: %d\n", rc);
  70                 LBUG();
  71                 return rc;
  72         }
  73
  74         remote_id.nid = conn->c_peer.peer_nid;
  75         remote_id.pid = 0;
  76
  77         CDEBUG(D_NET, "Sending %d bytes to portal %d, xid "LPD64"\n",
  78                request->rq_req_md.length, portal, request->rq_xid);
  79
  80         if (!portal)
  81                 LBUG();
  82         rc = PtlPut(md_h, PTL_NOACK_REQ, remote_id, portal, 0, request->rq_xid,
  83                     0, 0);
  84         if (rc != PTL_OK) {
  85                 CERROR("PtlPut("LPU64", %d, "LPD64") failed: %d\n",
  86                        remote_id.nid, portal, request->rq_xid, rc);
  87                 PtlMDUnlink(md_h);
  88         }
  89
  90         return rc;
  91 }
  92
  93 static inline struct iovec *
  94 ptlrpc_get_bulk_iov (struct ptlrpc_bulk_desc *desc)
  95 {
  96         struct iovec *iov;
  97
  98         if (desc->bd_page_count <= sizeof (desc->bd_iov)/sizeof (struct iovec))
  99                 return (desc->bd_iov);
 100
 101         OBD_ALLOC (iov, desc->bd_page_count * sizeof (struct iovec));
 102         if (iov == NULL)
 103                 LBUG();
 104
 105         return (iov);
 106 }
 107
 108 static inline void
 109 ptlrpc_put_bulk_iov (struct ptlrpc_bulk_desc *desc, struct iovec *iov)
 110 {
 111         if (desc->bd_page_count <= sizeof (desc->bd_iov)/sizeof (struct iovec))
 112                 return;
 113
 114         OBD_FREE (iov, desc->bd_page_count * sizeof (struct iovec));
 115 }
 116
 117 int ptlrpc_bulk_put(struct ptlrpc_bulk_desc *desc)
 118 {
 119         int rc;
 120         struct list_head *tmp, *next;
 121         ptl_process_id_t remote_id;
 122         __u32 xid = 0;
 123         struct iovec *iov;
 124         ENTRY;
 125
 126         iov = ptlrpc_get_bulk_iov (desc);
 127         if (iov == NULL)
 128                 RETURN (-ENOMEM);
 129
 130         desc->bd_md.start = iov;
 131         desc->bd_md.niov = 0;
 132         desc->bd_md.length = 0;
 133         desc->bd_md.eventq = bulk_put_source_eq;
 134         desc->bd_md.threshold = 2; /* SENT and ACK */
 135         desc->bd_md.options = PTL_MD_OP_PUT | PTL_MD_IOV;
 136         desc->bd_md.user_ptr = desc;
 137
 138         atomic_set(&desc->bd_source_callback_count, 2);
 139
 140         list_for_each_safe(tmp, next, &desc->bd_page_list) {
 141                 struct ptlrpc_bulk_page *bulk;
 142                 bulk = list_entry(tmp, struct ptlrpc_bulk_page, bp_link);
 143
 144                 LASSERT(desc->bd_md.niov < desc->bd_page_count);
 145
 146                 if (desc->bd_md.niov == 0)
 147                         xid = bulk->bp_xid;
 148                 LASSERT(xid == bulk->bp_xid);   /* should all be the same */
 149
 150                 iov[desc->bd_md.niov].iov_base = bulk->bp_buf;
 151                 iov[desc->bd_md.niov].iov_len = bulk->bp_buflen;
 152                 if (iov[desc->bd_md.niov].iov_len <= 0) {
 153                         CERROR("bad bp_buflen[%d] @ %p: %d\n", desc->bd_md.niov,
 154                                bulk->bp_buf, bulk->bp_buflen);
 155                         CERROR("desc: xid %u, pages %d, ptl %d, ref %d\n",
 156                                xid, desc->bd_page_count, desc->bd_portal,
 157                                atomic_read(&desc->bd_refcount));
 158                         LBUG();
 159                 }
 160                 desc->bd_md.niov++;
 161                 desc->bd_md.length += bulk->bp_buflen;
 162         }
 163
 164         LASSERT(desc->bd_md.niov == desc->bd_page_count);
 165         LASSERT(desc->bd_md.niov != 0);
 166
 167         rc = PtlMDBind(desc->bd_connection->c_peer.peer_ni, desc->bd_md,
 168                        &desc->bd_md_h);
 169
 170         ptlrpc_put_bulk_iov (desc, iov); /*move down to reduce latency to send*/
 171
 172         if (rc != PTL_OK) {
 173                 CERROR("PtlMDBind failed: %d\n", rc);
 174                 LBUG();
 175                 RETURN(rc);
 176         }
 177
 178         remote_id.nid = desc->bd_connection->c_peer.peer_nid;
 179         remote_id.pid = 0;
 180
 181         CDEBUG(D_NET, "Sending %u pages %u bytes to portal %d nid "LPX64" pid "
 182                "%d xid %d\n", desc->bd_md.niov, desc->bd_md.length,
 183                desc->bd_portal, remote_id.nid, remote_id.pid, xid);
 184
 185         rc = PtlPut(desc->bd_md_h, PTL_ACK_REQ, remote_id,
 186                     desc->bd_portal, 0, xid, 0, 0);
 187         if (rc != PTL_OK) {
 188                 CERROR("PtlPut("LPU64", %d, %d) failed: %d\n",
 189                        remote_id.nid, desc->bd_portal, xid, rc);
 190                 PtlMDUnlink(desc->bd_md_h);
 191                 LBUG();
 192                 RETURN(rc);
 193         }
 194
 195         RETURN(0);
 196 }
 197
 198 int ptlrpc_bulk_get(struct ptlrpc_bulk_desc *desc)
 199 {
 200         int rc;
 201         struct list_head *tmp, *next;
 202         ptl_process_id_t remote_id;
 203         __u32 xid = 0;
 204         struct iovec *iov;
 205         ENTRY;
 206
 207         iov = ptlrpc_get_bulk_iov (desc);
 208         if (iov == NULL)
 209                 RETURN (-ENOMEM);
 210
 211         desc->bd_md.start = iov;
 212         desc->bd_md.niov = 0;
 213         desc->bd_md.length = 0;
 214         desc->bd_md.eventq = bulk_get_sink_eq;
 215         desc->bd_md.threshold = 2; /* SENT and REPLY */
 216         desc->bd_md.options = PTL_MD_OP_GET | PTL_MD_IOV;
 217         desc->bd_md.user_ptr = desc;
 218
 219         atomic_set(&desc->bd_source_callback_count, 2);
 220
 221         list_for_each_safe(tmp, next, &desc->bd_page_list) {
 222                 struct ptlrpc_bulk_page *bulk;
 223                 bulk = list_entry(tmp, struct ptlrpc_bulk_page, bp_link);
 224
 225                 LASSERT(desc->bd_md.niov < desc->bd_page_count);
 226
 227                 if (desc->bd_md.niov == 0)
 228                         xid = bulk->bp_xid;
 229                 LASSERT(xid == bulk->bp_xid);   /* should all be the same */
 230
 231                 iov[desc->bd_md.niov].iov_base = bulk->bp_buf;
 232                 iov[desc->bd_md.niov].iov_len = bulk->bp_buflen;
 233                 if (iov[desc->bd_md.niov].iov_len <= 0) {
 234                         CERROR("bad bp_buflen[%d] @ %p: %d\n", desc->bd_md.niov,
 235                                bulk->bp_buf, bulk->bp_buflen);
 236                         CERROR("desc: xid %u, pages %d, ptl %d, ref %d\n",
 237                                xid, desc->bd_page_count, desc->bd_portal,
 238                                atomic_read(&desc->bd_refcount));
 239                         LBUG();
 240                 }
 241                 desc->bd_md.niov++;
 242                 desc->bd_md.length += bulk->bp_buflen;
 243         }
 244
 245         LASSERT(desc->bd_md.niov == desc->bd_page_count);
 246         LASSERT(desc->bd_md.niov != 0);
 247
 248         rc = PtlMDBind(desc->bd_connection->c_peer.peer_ni, desc->bd_md,
 249                        &desc->bd_md_h);
 250
 251         ptlrpc_put_bulk_iov (desc, iov); /*move down to reduce latency to send*/
 252
 253         if (rc != PTL_OK) {
 254                 CERROR("PtlMDBind failed: %d\n", rc);
 255                 LBUG();
 256                 RETURN(rc);
 257         }
 258
 259         remote_id.nid = desc->bd_connection->c_peer.peer_nid;
 260         remote_id.pid = 0;
 261
 262         CDEBUG(D_NET, "Sending %u pages %u bytes to portal %d nid "LPX64" pid "
 263                "%d xid %d\n", desc->bd_md.niov, desc->bd_md.length,
 264                desc->bd_portal, remote_id.nid, remote_id.pid, xid);
 265
 266         rc = PtlGet(desc->bd_md_h, remote_id, desc->bd_portal, 0, xid, 0);
 267         if (rc != PTL_OK) {
 268                 CERROR("PtlGet("LPU64", %d, %d) failed: %d\n",
 269                        remote_id.nid, desc->bd_portal, xid, rc);
 270                 PtlMDUnlink(desc->bd_md_h);
 271                 LBUG();
 272                 RETURN(rc);
 273         }
 274
 275         RETURN(0);
 276 }
 277
 278 static int ptlrpc_register_bulk_shared(struct ptlrpc_bulk_desc *desc)
 279 {
 280         struct list_head *tmp, *next;
 281         int rc;
 282         __u32 xid = 0;
 283         struct iovec *iov;
 284         ptl_process_id_t source_id;
 285         ENTRY;
 286
 287         if (desc->bd_page_count > PTL_MD_MAX_IOV) {
 288                 CERROR("iov longer than %d pages not supported (count=%d)\n",
 289                        PTL_MD_MAX_IOV, desc->bd_page_count);
 290                 RETURN(-EINVAL);
 291         }
 292
 293         iov = ptlrpc_get_bulk_iov (desc);
 294         if (iov == NULL)
 295                 return (-ENOMEM);
 296
 297         desc->bd_md.start = iov;
 298         desc->bd_md.niov = 0;
 299         desc->bd_md.length = 0;
 300         desc->bd_md.threshold = 1;
 301         desc->bd_md.user_ptr = desc;
 302
 303         list_for_each_safe(tmp, next, &desc->bd_page_list) {
 304                 struct ptlrpc_bulk_page *bulk;
 305                 bulk = list_entry(tmp, struct ptlrpc_bulk_page, bp_link);
 306
 307                 LASSERT(desc->bd_md.niov < desc->bd_page_count);
 308
 309                 if (desc->bd_md.niov == 0)
 310                         xid = bulk->bp_xid;
 311                 LASSERT(xid == bulk->bp_xid);   /* should all be the same */
 312
 313                 iov[desc->bd_md.niov].iov_base = bulk->bp_buf;
 314                 iov[desc->bd_md.niov].iov_len = bulk->bp_buflen;
 315                 desc->bd_md.niov++;
 316                 desc->bd_md.length += bulk->bp_buflen;
 317         }
 318
 319         LASSERT(desc->bd_md.niov == desc->bd_page_count);
 320         LASSERT(desc->bd_md.niov != 0);
 321
 322         source_id.nid = desc->bd_connection->c_peer.peer_nid;
 323         source_id.pid = PTL_PID_ANY;
 324
 325         rc = PtlMEAttach(desc->bd_connection->c_peer.peer_ni,
 326                          desc->bd_portal, source_id, xid, 0,
 327                          PTL_UNLINK, PTL_INS_AFTER, &desc->bd_me_h);
 328
 329         if (rc != PTL_OK) {
 330                 CERROR("PtlMEAttach failed: %d\n", rc);
 331                 LBUG();
 332                 GOTO(cleanup, rc);
 333         }
 334
 335         rc = PtlMDAttach(desc->bd_me_h, desc->bd_md, PTL_UNLINK,
 336                          &desc->bd_md_h);
 337         if (rc != PTL_OK) {
 338                 CERROR("PtlMDAttach failed: %d\n", rc);
 339                 LBUG();
 340                 GOTO(cleanup, rc);
 341         }
 342
 343         ptlrpc_put_bulk_iov (desc, iov);
 344
 345         CDEBUG(D_NET, "Setup bulk sink buffers: %u pages %u bytes, xid %u, "
 346                "portal %u\n", desc->bd_md.niov, desc->bd_md.length,
 347                xid, desc->bd_portal);
 348
 349         RETURN(0);
 350
 351  cleanup:
 352         ptlrpc_put_bulk_iov (desc, iov);
 353         ptlrpc_abort_bulk(desc);
 354
 355         return rc;
 356 }
 357
 358 int ptlrpc_register_bulk_get(struct ptlrpc_bulk_desc *desc)
 359 {
 360         desc->bd_md.options = PTL_MD_OP_GET | PTL_MD_IOV;
 361         desc->bd_md.eventq = bulk_get_source_eq;
 362
 363         return ptlrpc_register_bulk_shared(desc);
 364 }
 365
 366 int ptlrpc_register_bulk_put(struct ptlrpc_bulk_desc *desc)
 367 {
 368         desc->bd_md.options = PTL_MD_OP_PUT | PTL_MD_IOV;
 369         desc->bd_md.eventq = bulk_put_sink_eq;
 370
 371         return ptlrpc_register_bulk_shared(desc);
 372 }
 373
 374 int ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *desc)
 375 {
 376         /* This should be safe: these handles are initialized to be
 377          * invalid in ptlrpc_prep_bulk() */
 378         PtlMDUnlink(desc->bd_md_h);
 379         PtlMEUnlink(desc->bd_me_h);
 380
 381         return 0;
 382 }
 383
 384 void obd_brw_set_add(struct obd_brw_set *set, struct ptlrpc_bulk_desc *desc)
 385 {
 386         LASSERT(list_empty(&desc->bd_set_chain));
 387
 388         ptlrpc_bulk_addref(desc);
 389         atomic_inc(&set->brw_refcount);
 390         desc->bd_brw_set = set;
 391         list_add(&desc->bd_set_chain, &set->brw_desc_head);
 392 }
 393
 394 struct obd_brw_set *obd_brw_set_new(void)
 395 {
 396         struct obd_brw_set *set;
 397
 398         OBD_ALLOC(set, sizeof(*set));
 399
 400         if (set != NULL) {
 401                 init_waitqueue_head(&set->brw_waitq);
 402                 INIT_LIST_HEAD(&set->brw_desc_head);
 403                 atomic_set(&set->brw_refcount, 0);
 404         }
 405
 406         return set;
 407 }
 408
 409 void obd_brw_set_free(struct obd_brw_set *set)
 410 {
 411         struct list_head *tmp, *next;
 412         ENTRY;
 413
 414         if (!list_empty(&set->brw_desc_head)) {
 415                 EXIT;
 416                 return;
 417         }
 418
 419         list_for_each_safe(tmp, next, &set->brw_desc_head) {
 420                 struct ptlrpc_bulk_desc *desc =
 421                         list_entry(tmp, struct ptlrpc_bulk_desc, bd_set_chain);
 422
 423                 CERROR("Unfinished bulk descriptor: %p\n", desc);
 424
 425                 ptlrpc_abort_bulk(desc);
 426         }
 427         OBD_FREE(set, sizeof(*set));
 428         EXIT;
 429         return;
 430 }
 431
 432 int ptlrpc_reply(struct ptlrpc_service *svc, struct ptlrpc_request *req)
 433 {
 434         if (req->rq_repmsg == NULL) {
 435                 CERROR("bad: someone called ptlrpc_reply when they meant "
 436                        "ptlrpc_error\n");
 437                 return -EINVAL;
 438         }
 439
 440         /* FIXME: we need to increment the count of handled events */
 441         if (req->rq_type != PTL_RPC_MSG_ERR)
 442                 req->rq_type = PTL_RPC_MSG_REPLY;
 443         //req->rq_repmsg->conn = req->rq_connection->c_remote_conn;
 444         //req->rq_repmsg->token = req->rq_connection->c_remote_token;
 445         req->rq_repmsg->status = HTON__u32(req->rq_status);
 446         return ptl_send_buf(req, req->rq_connection, svc->srv_rep_portal);
 447 }
 448
 449 int ptlrpc_error(struct ptlrpc_service *svc, struct ptlrpc_request *req)
 450 {
 451         int rc;
 452         ENTRY;
 453
 454         if (!req->rq_repmsg) {
 455                 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen,
 456                                      &req->rq_repmsg);
 457                 if (rc)
 458                         RETURN(rc);
 459         }
 460
 461
 462         req->rq_type = PTL_RPC_MSG_ERR;
 463
 464         rc = ptlrpc_reply(svc, req);
 465         RETURN(rc);
 466 }
 467
 468 int ptl_send_rpc(struct ptlrpc_request *request)
 469 {
 470         int rc;
 471         char *repbuf;
 472         ptl_process_id_t source_id;
 473
 474         ENTRY;
 475
 476         if (request->rq_type != PTL_RPC_MSG_REQUEST) {
 477                 CERROR("wrong packet type sent %d\n",
 478                        NTOH__u32(request->rq_reqmsg->type));
 479                 LBUG();
 480                 RETURN(EINVAL);
 481         }
 482
 483         source_id.nid = request->rq_connection->c_peer.peer_nid;
 484         source_id.pid = PTL_PID_ANY;
 485
 486         /* add a ref, which will be balanced in request_out_callback */
 487         ptlrpc_request_addref(request);
 488         if (request->rq_replen != 0) {
 489                 if (request->rq_reply_md.start != NULL) {
 490                         rc = PtlMEUnlink(request->rq_reply_me_h);
 491                         if (rc != PTL_OK && rc != PTL_INV_ME) {
 492                                 CERROR("rc %d\n", rc);
 493                                 LBUG();
 494                         }
 495                         repbuf = (char *)request->rq_reply_md.start;
 496                         request->rq_repmsg = NULL;
 497                 } else {
 498                         OBD_ALLOC(repbuf, request->rq_replen);
 499                         if (!repbuf) {
 500                                 LBUG();
 501                                 RETURN(ENOMEM);
 502                         }
 503                 }
 504
 505                 rc = PtlMEAttach(request->rq_connection->c_peer.peer_ni,
 506                              request->rq_reply_portal,/* XXX FIXME bug 625069 */
 507                                  source_id, request->rq_xid, 0, PTL_UNLINK,
 508                                  PTL_INS_AFTER, &request->rq_reply_me_h);
 509                 if (rc != PTL_OK) {
 510                         CERROR("PtlMEAttach failed: %d\n", rc);
 511                         LBUG();
 512                         GOTO(cleanup, rc);
 513                 }
 514
 515                 request->rq_reply_md.start = repbuf;
 516                 request->rq_reply_md.length = request->rq_replen;
 517                 request->rq_reply_md.threshold = 1;
 518                 request->rq_reply_md.options = PTL_MD_OP_PUT;
 519                 request->rq_reply_md.user_ptr = request;
 520                 request->rq_reply_md.eventq = reply_in_eq;
 521
 522                 rc = PtlMDAttach(request->rq_reply_me_h, request->rq_reply_md,
 523                                  PTL_UNLINK, NULL);
 524                 if (rc != PTL_OK) {
 525                         CERROR("PtlMDAttach failed: %d\n", rc);
 526                         LBUG();
 527                         GOTO(cleanup2, rc);
 528                 }
 529
 530                 CDEBUG(D_NET, "Setup reply buffer: %u bytes, xid "LPU64
 531                        ", portal %u\n",
 532                        request->rq_replen, request->rq_xid,
 533                        request->rq_reply_portal);
 534         }
 535
 536         /* Clear any flags that may be present from previous sends,
 537          * except for REPLAY. */
 538         request->rq_flags &= PTL_RPC_FL_REPLAY;
 539         rc = ptl_send_buf(request, request->rq_connection,
 540                           request->rq_request_portal);
 541         RETURN(rc);
 542
 543  cleanup2:
 544         PtlMEUnlink(request->rq_reply_me_h);
 545  cleanup:
 546         OBD_FREE(repbuf, request->rq_replen);
 547         // up(&request->rq_client->cli_rpc_sem);
 548
 549         return rc;
 550 }
 551
 552 void ptlrpc_link_svc_me(struct ptlrpc_request_buffer_desc *rqbd)
 553 {
 554         struct ptlrpc_service *service = rqbd->rqbd_service;
 555         static ptl_process_id_t match_id = {PTL_NID_ANY, PTL_PID_ANY};
 556         int rc;
 557         ptl_md_t dummy;
 558         ptl_handle_md_t md_h;
 559
 560         LASSERT(atomic_read(&rqbd->rqbd_refcount) == 0);
 561
 562         /* Attach the leading ME on which we build the ring */
 563         rc = PtlMEAttach(service->srv_self.peer_ni, service->srv_req_portal,
 564                          match_id, 0, ~0,
 565                          PTL_UNLINK, PTL_INS_AFTER, &rqbd->rqbd_me_h);
 566         if (rc != PTL_OK) {
 567                 CERROR("PtlMEAttach failed: %d\n", rc);
 568                 LBUG();
 569         }
 570
 571         dummy.start      = rqbd->rqbd_buffer;
 572         dummy.length     = service->srv_buf_size;
 573         dummy.max_size   = service->srv_max_req_size;
 574         dummy.threshold  = PTL_MD_THRESH_INF;
 575         dummy.options    = PTL_MD_OP_PUT | PTL_MD_MAX_SIZE | PTL_MD_AUTO_UNLINK;
 576         dummy.user_ptr   = rqbd;
 577         dummy.eventq     = service->srv_eq_h;
 578
 579         atomic_inc(&service->srv_nrqbds_receiving);
 580         atomic_set(&rqbd->rqbd_refcount, 1);   /* 1 ref for portals */
 581
 582         rc = PtlMDAttach(rqbd->rqbd_me_h, dummy, PTL_UNLINK, &md_h);
 583         if (rc != PTL_OK) {
 584                 CERROR("PtlMDAttach failed: %d\n", rc);
 585                 LBUG();
 586 #warning proper cleanup required
 587                 PtlMEUnlink (rqbd->rqbd_me_h);
 588                 atomic_set(&rqbd->rqbd_refcount, 0);
 589                 atomic_dec(&service->srv_nrqbds_receiving);
 590         }
 591 }