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                          unsigned int offset)
  40 {
  41         int              rc;
  42         lnet_md_t         md;
  43         ENTRY;
  44
  45         LASSERT (portal != 0);
  46         LASSERT (conn != NULL);
  47         CDEBUG (D_INFO, "conn=%p id %s\n", conn, libcfs_id2str(conn->c_peer));
  48         md.start     = base;
  49         md.length    = len;
  50         md.threshold = (ack == LNET_ACK_REQ) ? 2 : 1;
  51         md.options   = PTLRPC_MD_OPTIONS;
  52         md.user_ptr  = cbid;
  53         md.eq_handle = ptlrpc_eq_h;
  54
  55         if (ack == LNET_ACK_REQ &&
  56             OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_ACK | OBD_FAIL_ONCE)) {
  57                 /* don't ask for the ack to simulate failing client */
  58                 ack = LNET_NOACK_REQ;
  59                 obd_fail_loc |= OBD_FAIL_ONCE | OBD_FAILED;
  60         }
  61
  62         rc = LNetMDBind (md, LNET_UNLINK, mdh);
  63         if (rc != 0) {
  64                 CERROR ("LNetMDBind failed: %d\n", rc);
  65                 LASSERT (rc == -ENOMEM);
  66                 RETURN (-ENOMEM);
  67         }
  68
  69         CDEBUG(D_NET, "Sending %d bytes to portal %d, xid "LPD64", offset %u\n",
  70                len, portal, xid, offset);
  71
  72         rc = LNetPut (conn->c_self, *mdh, ack,
  73                       conn->c_peer, portal, xid, offset, 0);
  74         if (rc != 0) {
  75                 int rc2;
  76                 /* We're going to get an UNLINK event when I unlink below,
  77                  * which will complete just like any other failed send, so
  78                  * I fall through and return success here! */
  79                 CERROR("LNetPut(%s, %d, "LPD64") failed: %d\n",
  80                        libcfs_id2str(conn->c_peer), portal, xid, rc);
  81                 rc2 = LNetMDUnlink(*mdh);
  82                 LASSERTF(rc2 == 0, "rc2 = %d\n", rc2);
  83         }
  84
  85         RETURN (0);
  86 }
  87
  88 int ptlrpc_start_bulk_transfer (struct ptlrpc_bulk_desc *desc)
  89 {
  90         struct ptlrpc_connection *conn = desc->bd_export->exp_connection;
  91         int                       rc;
  92         int                       rc2;
  93         lnet_md_t                 md;
  94         __u64                     xid;
  95         ENTRY;
  96
  97         if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_BULK_PUT_NET))
  98                 RETURN(0);
  99
 100         /* NB no locking required until desc is on the network */
 101         LASSERT (!desc->bd_network_rw);
 102         LASSERT (desc->bd_type == BULK_PUT_SOURCE ||
 103                  desc->bd_type == BULK_GET_SINK);
 104         desc->bd_success = 0;
 105         desc->bd_sender = LNET_NID_ANY;
 106
 107         md.user_ptr = &desc->bd_cbid;
 108         md.eq_handle = ptlrpc_eq_h;
 109         md.threshold = 2; /* SENT and ACK/REPLY */
 110         md.options = PTLRPC_MD_OPTIONS;
 111         ptlrpc_fill_bulk_md(&md, desc);
 112
 113         LASSERT (desc->bd_cbid.cbid_fn == server_bulk_callback);
 114         LASSERT (desc->bd_cbid.cbid_arg == desc);
 115
 116         /* NB total length may be 0 for a read past EOF, so we send a 0
 117          * length bulk, since the client expects a bulk event. */
 118
 119         rc = LNetMDBind(md, LNET_UNLINK, &desc->bd_md_h);
 120         if (rc != 0) {
 121                 CERROR("LNetMDBind failed: %d\n", rc);
 122                 LASSERT (rc == -ENOMEM);
 123                 RETURN(-ENOMEM);
 124         }
 125
 126         /* Client's bulk and reply matchbits are the same */
 127         xid = desc->bd_req->rq_xid;
 128         CDEBUG(D_NET, "Transferring %u pages %u bytes via portal %d "
 129                "id %s xid "LPX64"\n", desc->bd_iov_count,
 130                desc->bd_nob, desc->bd_portal,
 131                libcfs_id2str(conn->c_peer), xid);
 132
 133         /* Network is about to get at the memory */
 134         desc->bd_network_rw = 1;
 135
 136         if (desc->bd_type == BULK_PUT_SOURCE)
 137                 rc = LNetPut (conn->c_self, desc->bd_md_h, LNET_ACK_REQ,
 138                               conn->c_peer, desc->bd_portal, xid, 0, 0);
 139         else
 140                 rc = LNetGet (conn->c_self, desc->bd_md_h,
 141                               conn->c_peer, desc->bd_portal, xid, 0);
 142
 143         if (rc != 0) {
 144                 /* Can't send, so we unlink the MD bound above.  The UNLINK
 145                  * event this creates will signal completion with failure,
 146                  * so we return SUCCESS here! */
 147                 CERROR("Transfer(%s, %d, "LPX64") failed: %d\n",
 148                        libcfs_id2str(conn->c_peer), desc->bd_portal, xid, rc);
 149                 rc2 = LNetMDUnlink(desc->bd_md_h);
 150                 LASSERT (rc2 == 0);
 151         }
 152
 153         RETURN(0);
 154 }
 155
 156 void ptlrpc_abort_bulk (struct ptlrpc_bulk_desc *desc)
 157 {
 158         /* Server side bulk abort. Idempotent. Not thread-safe (i.e. only
 159          * serialises with completion callback) */
 160         struct l_wait_info lwi;
 161         int                rc;
 162
 163         LASSERT (!in_interrupt ());             /* might sleep */
 164
 165         if (!ptlrpc_bulk_active(desc))          /* completed or */
 166                 return;                         /* never started */
 167
 168         /* Do not send any meaningful data over the wire for evicted clients */
 169         if (desc->bd_export && desc->bd_export->exp_failed)
 170                 ptl_rpc_wipe_bulk_pages(desc);
 171
 172         /* The unlink ensures the callback happens ASAP and is the last
 173          * one.  If it fails, it must be because completion just happened,
 174          * but we must still l_wait_event() in this case, to give liblustre
 175          * a chance to run server_bulk_callback()*/
 176
 177         LNetMDUnlink (desc->bd_md_h);
 178
 179         for (;;) {
 180                 /* Network access will complete in finite time but the HUGE
 181                  * timeout lets us CWARN for visibility of sluggish NALs */
 182                 lwi = LWI_TIMEOUT (cfs_time_seconds(300), NULL, NULL);
 183                 rc = l_wait_event(desc->bd_waitq,
 184                                   !ptlrpc_bulk_active(desc), &lwi);
 185                 if (rc == 0)
 186                         return;
 187
 188                 LASSERT(rc == -ETIMEDOUT);
 189                 CWARN("Unexpectedly long timeout: desc %p\n", desc);
 190         }
 191 }
 192
 193 int ptlrpc_register_bulk (struct ptlrpc_request *req)
 194 {
 195         struct ptlrpc_bulk_desc *desc = req->rq_bulk;
 196         lnet_process_id_t peer;
 197         int rc;
 198         int rc2;
 199         lnet_handle_me_t  me_h;
 200         lnet_md_t         md;
 201         ENTRY;
 202
 203         if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_BULK_GET_NET))
 204                 RETURN(0);
 205
 206         /* NB no locking required until desc is on the network */
 207         LASSERT (desc->bd_nob > 0);
 208         LASSERT (!desc->bd_network_rw);
 209         LASSERT (desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
 210         LASSERT (desc->bd_req != NULL);
 211         LASSERT (desc->bd_type == BULK_PUT_SINK ||
 212                  desc->bd_type == BULK_GET_SOURCE);
 213
 214         desc->bd_success = 0;
 215         desc->bd_sender = LNET_NID_ANY;
 216
 217         peer = desc->bd_import->imp_connection->c_peer;
 218
 219         md.user_ptr = &desc->bd_cbid;
 220         md.eq_handle = ptlrpc_eq_h;
 221         md.threshold = 1;                       /* PUT or GET */
 222         md.options = PTLRPC_MD_OPTIONS |
 223                      ((desc->bd_type == BULK_GET_SOURCE) ?
 224                       LNET_MD_OP_GET : LNET_MD_OP_PUT);
 225         ptlrpc_fill_bulk_md(&md, desc);
 226
 227         LASSERT (desc->bd_cbid.cbid_fn == client_bulk_callback);
 228         LASSERT (desc->bd_cbid.cbid_arg == desc);
 229
 230         /* XXX Registering the same xid on retried bulk makes my head
 231          * explode trying to understand how the original request's bulk
 232          * might interfere with the retried request -eeb */
 233         LASSERTF (!desc->bd_registered || req->rq_xid != desc->bd_last_xid,
 234                   "registered: %d  rq_xid: "LPU64" bd_last_xid: "LPU64"\n",
 235                   desc->bd_registered, req->rq_xid, desc->bd_last_xid);
 236         desc->bd_registered = 1;
 237         desc->bd_last_xid = req->rq_xid;
 238
 239         rc = LNetMEAttach(desc->bd_portal, peer,
 240                          req->rq_xid, 0, LNET_UNLINK, LNET_INS_AFTER, &me_h);
 241         if (rc != 0) {
 242                 CERROR("LNetMEAttach failed: %d\n", rc);
 243                 LASSERT (rc == -ENOMEM);
 244                 RETURN (-ENOMEM);
 245         }
 246
 247         /* About to let the network at it... */
 248         desc->bd_network_rw = 1;
 249         rc = LNetMDAttach(me_h, md, LNET_UNLINK, &desc->bd_md_h);
 250         if (rc != 0) {
 251                 CERROR("LNetMDAttach failed: %d\n", rc);
 252                 LASSERT (rc == -ENOMEM);
 253                 desc->bd_network_rw = 0;
 254                 rc2 = LNetMEUnlink (me_h);
 255                 LASSERT (rc2 == 0);
 256                 RETURN (-ENOMEM);
 257         }
 258
 259         CDEBUG(D_NET, "Setup bulk %s buffers: %u pages %u bytes, xid "LPX64", "
 260                "portal %u\n",
 261                desc->bd_type == BULK_GET_SOURCE ? "get-source" : "put-sink",
 262                desc->bd_iov_count, desc->bd_nob,
 263                req->rq_xid, desc->bd_portal);
 264         RETURN(0);
 265 }
 266
 267 void ptlrpc_unregister_bulk (struct ptlrpc_request *req)
 268 {
 269         /* Disconnect a bulk desc from the network. Idempotent. Not
 270          * thread-safe (i.e. only interlocks with completion callback). */
 271         struct ptlrpc_bulk_desc *desc = req->rq_bulk;
 272         cfs_waitq_t             *wq;
 273         struct l_wait_info       lwi;
 274         int                      rc;
 275
 276         LASSERT (!in_interrupt ());     /* might sleep */
 277
 278         if (!ptlrpc_bulk_active(desc))  /* completed or */
 279                 return;                 /* never registered */
 280
 281         LASSERT (desc->bd_req == req);  /* bd_req NULL until registered */
 282
 283         /* the unlink ensures the callback happens ASAP and is the last
 284          * one.  If it fails, it must be because completion just happened,
 285          * but we must still l_wait_event() in this case to give liblustre
 286          * a chance to run client_bulk_callback() */
 287
 288         LNetMDUnlink (desc->bd_md_h);
 289
 290         if (req->rq_set != NULL)
 291                 wq = &req->rq_set->set_waitq;
 292         else
 293                 wq = &req->rq_reply_waitq;
 294
 295         for (;;) {
 296                 /* Network access will complete in finite time but the HUGE
 297                  * timeout lets us CWARN for visibility of sluggish NALs */
 298                 lwi = LWI_TIMEOUT (cfs_time_seconds(300), NULL, NULL);
 299                 rc = l_wait_event(*wq, !ptlrpc_bulk_active(desc), &lwi);
 300                 if (rc == 0)
 301                         return;
 302
 303                 LASSERT (rc == -ETIMEDOUT);
 304                 DEBUG_REQ(D_WARNING,req,"Unexpectedly long timeout: desc %p",
 305                           desc);
 306         }
 307 }
 308
 309 int ptlrpc_send_reply (struct ptlrpc_request *req, int flags)
 310 {
 311         struct ptlrpc_service     *svc = req->rq_rqbd->rqbd_service;
 312         struct ptlrpc_reply_state *rs = req->rq_reply_state;
 313         struct ptlrpc_connection  *conn;
 314         int                        service_time;
 315         unsigned int               offset = 0;
 316         int                        rc;
 317
 318         /* We must already have a reply buffer (only ptlrpc_error() may be
 319          * called without one).  We must also have a request buffer which
 320          * is either the actual (swabbed) incoming request, or a saved copy
 321          * if this is a req saved in target_queue_final_reply(). */
 322         LASSERT (req->rq_reqmsg != NULL);
 323         LASSERT (req->rq_repmsg != NULL);
 324         LASSERT (rs != NULL);
 325         LASSERT (req->rq_repmsg == rs->rs_msg);
 326         LASSERT ((flags & PTLRPC_REPLY_MAYBE_DIFFICULT) || !rs->rs_difficult);
 327         LASSERT (rs->rs_cb_id.cbid_fn == reply_out_callback);
 328         LASSERT (rs->rs_cb_id.cbid_arg == rs);
 329
 330         /* There may be no rq_export during failover */
 331
 332         if (req->rq_export && req->rq_export->exp_obd &&
 333             req->rq_export->exp_obd->obd_fail) {
 334                 /* Failed obd's only send ENODEV */
 335                 req->rq_type = PTL_RPC_MSG_ERR;
 336                 req->rq_status = -ENODEV;
 337                 CDEBUG(D_HA, "sending ENODEV from failed obd %d\n",
 338                        req->rq_export->exp_obd->obd_minor);
 339         }
 340
 341         if (req->rq_type != PTL_RPC_MSG_ERR)
 342                 req->rq_type = PTL_RPC_MSG_REPLY;
 343
 344         lustre_msg_set_type(req->rq_repmsg, req->rq_type);
 345         lustre_msg_set_status(req->rq_repmsg, req->rq_status);
 346         lustre_msg_set_opc(req->rq_repmsg, lustre_msg_get_opc(req->rq_reqmsg));
 347
 348         service_time = max_t(int, cfs_time_current_sec() -
 349                              req->rq_arrival_time.tv_sec, 1);
 350         if (!(flags & PTLRPC_REPLY_EARLY) &&
 351             (req->rq_type != PTL_RPC_MSG_ERR)) {
 352                 /* early replies and errors don't count toward our service
 353                    time estimate */
 354                 int oldse = at_add(&svc->srv_at_estimate, service_time);
 355                 if (oldse != 0)
 356                         DEBUG_REQ(D_ADAPTTO, req,
 357                                   "svc %s changed estimate from %d to %d",
 358                                   svc->srv_name, oldse,
 359                                   at_get(&svc->srv_at_estimate));
 360         }
 361         /* Report actual service time for client latency calc */
 362         lustre_msg_set_service_time(req->rq_repmsg, service_time);
 363         /* Report service time estimate for future client reqs */
 364         lustre_msg_set_timeout(req->rq_repmsg, at_get(&svc->srv_at_estimate));
 365
 366         target_pack_pool_reply(req);
 367
 368         if (lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT) {
 369                 /* early replies go to offset 0, regular replies go after that*/
 370                 if (flags & PTLRPC_REPLY_EARLY) {
 371                         offset = 0;
 372                         /* Include a checksum on early replies - must be done
 373                            after all other lustre_msg_set_* */
 374                         lustre_msg_set_cksum(req->rq_repmsg,
 375                                          lustre_msg_calc_cksum(req->rq_repmsg));
 376                 } else {
 377                         offset = lustre_msg_early_size();
 378                 }
 379         } else {
 380                 CDEBUG(D_ADAPTTO, "No early reply support: flags=%#x "
 381                        "req_flags=%#x magic=%d:%x/%x len=%d\n",
 382                       flags, lustre_msg_get_flags(req->rq_reqmsg),
 383                       lustre_msg_is_v1(req->rq_reqmsg),
 384                       lustre_msg_get_magic(req->rq_reqmsg),
 385                       lustre_msg_get_magic(req->rq_repmsg), req->rq_replen);
 386         }
 387
 388         if (req->rq_export == NULL || req->rq_export->exp_connection == NULL)
 389                 conn = ptlrpc_get_connection(req->rq_peer, req->rq_self, NULL);
 390         else
 391                 conn = ptlrpc_connection_addref(req->rq_export->exp_connection);
 392
 393         if (conn == NULL) {
 394                 CERROR("not replying on NULL connection\n"); /* bug 9635 */
 395                 return -ENOTCONN;
 396         }
 397
 398         atomic_inc (&svc->srv_outstanding_replies);
 399         ptlrpc_rs_addref(rs);                   /* +1 ref for the network */
 400         req->rq_sent = cfs_time_current_sec();
 401
 402         rc = ptl_send_buf (&rs->rs_md_h, req->rq_repmsg, req->rq_replen,
 403                            rs->rs_difficult ? LNET_ACK_REQ : LNET_NOACK_REQ,
 404                            &rs->rs_cb_id, conn, svc->srv_rep_portal,
 405                            req->rq_xid, offset);
 406         if (rc != 0) {
 407                 atomic_dec (&svc->srv_outstanding_replies);
 408                 ptlrpc_req_drop_rs(req);
 409         }
 410         ptlrpc_put_connection(conn);
 411         return rc;
 412 }
 413
 414 int ptlrpc_reply (struct ptlrpc_request *req)
 415 {
 416         return (ptlrpc_send_reply (req, 0));
 417 }
 418
 419 int ptlrpc_send_error(struct ptlrpc_request *req, int may_be_difficult)
 420 {
 421         int rc;
 422         ENTRY;
 423
 424         if (!req->rq_repmsg) {
 425                 rc = lustre_pack_reply(req, 1, NULL, NULL);
 426                 if (rc)
 427                         RETURN(rc);
 428         }
 429
 430         req->rq_type = PTL_RPC_MSG_ERR;
 431
 432         rc = ptlrpc_send_reply(req, may_be_difficult);
 433         RETURN(rc);
 434 }
 435
 436 int ptlrpc_error(struct ptlrpc_request *req)
 437 {
 438         return ptlrpc_send_error(req, 0);
 439 }
 440
 441 int ptl_send_rpc(struct ptlrpc_request *request, int noreply)
 442 {
 443         int rc;
 444         int rc2;
 445         struct ptlrpc_connection *connection;
 446         lnet_handle_me_t  reply_me_h;
 447         lnet_md_t         reply_md;
 448         struct obd_device *obd = request->rq_import->imp_obd;
 449         ENTRY;
 450
 451         OBD_FAIL_RETURN(OBD_FAIL_PTLRPC_DROP_RPC, 0);
 452
 453         LASSERT (request->rq_type == PTL_RPC_MSG_REQUEST);
 454
 455         /* If this is a re-transmit, we're required to have disengaged
 456          * cleanly from the previous attempt */
 457         LASSERT (!request->rq_receiving_reply);
 458
 459         if (request->rq_import->imp_obd &&
 460             request->rq_import->imp_obd->obd_fail) {
 461                 CDEBUG(D_HA, "muting rpc for failed imp obd %s\n",
 462                        request->rq_import->imp_obd->obd_name);
 463                 /* this prevents us from waiting in ptlrpc_queue_wait */
 464                 request->rq_err = 1;
 465                 RETURN(-ENODEV);
 466         }
 467
 468         connection = request->rq_import->imp_connection;
 469
 470         if (request->rq_bulk != NULL) {
 471                 rc = ptlrpc_register_bulk (request);
 472                 if (rc != 0)
 473                         RETURN(rc);
 474         }
 475
 476         lustre_msg_set_handle(request->rq_reqmsg,
 477                               &request->rq_import->imp_remote_handle);
 478         lustre_msg_set_type(request->rq_reqmsg, PTL_RPC_MSG_REQUEST);
 479         lustre_msg_set_conn_cnt(request->rq_reqmsg,
 480                                 request->rq_import->imp_conn_cnt);
 481         lustre_msghdr_set_flags(request->rq_reqmsg,
 482                                 request->rq_import->imp_msghdr_flags);
 483
 484         if (!noreply) {
 485                 LASSERT (request->rq_replen != 0);
 486                 if (request->rq_repbuf == NULL)
 487                         OBD_ALLOC(request->rq_repbuf, request->rq_replen);
 488                 if (request->rq_repbuf == NULL)
 489                         GOTO(cleanup_bulk, rc = -ENOMEM);
 490                 request->rq_repmsg = NULL;
 491
 492                 rc = LNetMEAttach(request->rq_reply_portal,/*XXX FIXME bug 249*/
 493                                   connection->c_peer, request->rq_xid, 0,
 494                                   LNET_UNLINK, LNET_INS_AFTER, &reply_me_h);
 495                 if (rc != 0) {
 496                         CERROR("LNetMEAttach failed: %d\n", rc);
 497                         LASSERT (rc == -ENOMEM);
 498                         GOTO(cleanup_repmsg, rc = -ENOMEM);
 499                 }
 500         }
 501
 502         spin_lock(&request->rq_lock);
 503         /* If the MD attach succeeds, there _will_ be a reply_in callback */
 504         request->rq_receiving_reply = !noreply;
 505         /* We are responsible for unlinking the reply buffer */
 506         request->rq_must_unlink = !noreply;
 507         /* Clear any flags that may be present from previous sends. */
 508         request->rq_replied = 0;
 509         request->rq_err = 0;
 510         request->rq_timedout = 0;
 511         request->rq_net_err = 0;
 512         request->rq_resend = 0;
 513         request->rq_restart = 0;
 514         spin_unlock(&request->rq_lock);
 515
 516         if (!noreply) {
 517                 reply_md.start     = request->rq_repbuf;
 518                 reply_md.length    = request->rq_replen;
 519                 /* Allow multiple early replies */
 520                 reply_md.threshold = LNET_MD_THRESH_INF;
 521                 /* Manage remote for early replies */
 522                 reply_md.options   = PTLRPC_MD_OPTIONS | LNET_MD_OP_PUT |
 523                         LNET_MD_MANAGE_REMOTE;
 524                 reply_md.user_ptr  = &request->rq_reply_cbid;
 525                 reply_md.eq_handle = ptlrpc_eq_h;
 526
 527                 /* We must see the unlink callback to unset rq_must_unlink,
 528                    so we can't auto-unlink */
 529                 rc = LNetMDAttach(reply_me_h, reply_md, LNET_RETAIN,
 530                                  &request->rq_reply_md_h);
 531                 if (rc != 0) {
 532                         CERROR("LNetMDAttach failed: %d\n", rc);
 533                         LASSERT (rc == -ENOMEM);
 534                         spin_lock(&request->rq_lock);
 535                         /* ...but the MD attach didn't succeed... */
 536                         request->rq_receiving_reply = 0;
 537                         spin_unlock(&request->rq_lock);
 538                         GOTO(cleanup_me, rc -ENOMEM);
 539                 }
 540
 541                 CDEBUG(D_NET, "Setup reply buffer: %u bytes, xid "LPU64
 542                        ", portal %u\n",
 543                        request->rq_replen, request->rq_xid,
 544                        request->rq_reply_portal);
 545         }
 546
 547         /* add references on request for request_out_callback */
 548         ptlrpc_request_addref(request);
 549         if (obd->obd_svc_stats != NULL)
 550                 lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQACTIVE_CNTR,
 551                                     request->rq_import->imp_inflight.counter);
 552
 553         OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_DELAY_SEND, request->rq_timeout + 5);
 554
 555         request->rq_sent = cfs_time_current_sec();
 556         do_gettimeofday(&request->rq_arrival_time);
 557         /* We give the server rq_timeout secs to process the req, and
 558            add the network latency for our local timeout. */
 559         request->rq_deadline = request->rq_sent + request->rq_timeout +
 560                     ptlrpc_at_get_net_latency(request);
 561
 562         ptlrpc_pinger_sending_on_import(request->rq_import);
 563
 564         DEBUG_REQ(D_INFO, request, "send flg=%x",
 565                   lustre_msg_get_flags(request->rq_reqmsg));
 566         rc = ptl_send_buf(&request->rq_req_md_h,
 567                           request->rq_reqmsg, request->rq_reqlen,
 568                           LNET_NOACK_REQ, &request->rq_req_cbid,
 569                           connection,
 570                           request->rq_request_portal,
 571                           request->rq_xid, 0);
 572         if (rc == 0) {
 573                 ptlrpc_lprocfs_rpc_sent(request);
 574                 RETURN(rc);
 575         }
 576
 577         ptlrpc_req_finished(request);
 578         if (noreply)
 579                 RETURN(rc);
 580
 581  cleanup_me:
 582         /* MEUnlink is safe; the PUT didn't even get off the ground, and
 583          * nobody apart from the PUT's target has the right nid+XID to
 584          * access the reply buffer. */
 585         rc2 = LNetMEUnlink(reply_me_h);
 586         LASSERT (rc2 == 0);
 587         /* UNLINKED callback called synchronously */
 588         LASSERT (!request->rq_receiving_reply);
 589
 590  cleanup_repmsg:
 591         OBD_FREE(request->rq_repbuf, request->rq_replen);
 592         request->rq_repbuf = NULL;
 593         request->rq_repmsg = NULL; //remove
 594
 595  cleanup_bulk:
 596         if (request->rq_bulk != NULL)
 597                 ptlrpc_unregister_bulk(request);
 598
 599         return rc;
 600 }
 601
 602 int ptlrpc_register_rqbd (struct ptlrpc_request_buffer_desc *rqbd)
 603 {
 604         struct ptlrpc_service   *service = rqbd->rqbd_service;
 605         static lnet_process_id_t  match_id = {LNET_NID_ANY, LNET_PID_ANY};
 606         int                      rc;
 607         lnet_md_t                 md;
 608         lnet_handle_me_t          me_h;
 609
 610         CDEBUG(D_NET, "LNetMEAttach: portal %d\n",
 611                service->srv_req_portal);
 612
 613         if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_PTLRPC_RQBD))
 614                 return (-ENOMEM);
 615
 616         rc = LNetMEAttach(service->srv_req_portal,
 617                           match_id, 0, ~0, LNET_UNLINK, LNET_INS_AFTER, &me_h);
 618         if (rc != 0) {
 619                 CERROR("LNetMEAttach failed: %d\n", rc);
 620                 return (-ENOMEM);
 621         }
 622
 623         LASSERT(rqbd->rqbd_refcount == 0);
 624         rqbd->rqbd_refcount = 1;
 625
 626         md.start     = rqbd->rqbd_buffer;
 627         md.length    = service->srv_buf_size;
 628         md.max_size  = service->srv_max_req_size;
 629         md.threshold = LNET_MD_THRESH_INF;
 630         md.options   = PTLRPC_MD_OPTIONS | LNET_MD_OP_PUT | LNET_MD_MAX_SIZE;
 631         md.user_ptr  = &rqbd->rqbd_cbid;
 632         md.eq_handle = ptlrpc_eq_h;
 633
 634         rc = LNetMDAttach(me_h, md, LNET_UNLINK, &rqbd->rqbd_md_h);
 635         if (rc == 0)
 636                 return (0);
 637
 638         CERROR("LNetMDAttach failed: %d; \n", rc);
 639         LASSERT (rc == -ENOMEM);
 640         rc = LNetMEUnlink (me_h);
 641         LASSERT (rc == 0);
 642         rqbd->rqbd_refcount = 0;
 643
 644         return (-ENOMEM);
 645 }