lustre/ptlrpc/client.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2002 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/obd_class.h>
  27 #include <linux/lustre_lib.h>
  28 #include <linux/lustre_ha.h>
  29 #include <linux/lustre_import.h>
  30
  31 void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
  32                         struct ptlrpc_client *cl)
  33 {
  34         cl->cli_request_portal = req_portal;
  35         cl->cli_reply_portal   = rep_portal;
  36         cl->cli_name           = name;
  37 }
  38
  39 __u8 *ptlrpc_req_to_uuid(struct ptlrpc_request *req)
  40 {
  41         return req->rq_connection->c_remote_uuid;
  42 }
  43
  44 struct ptlrpc_connection *ptlrpc_uuid_to_connection(obd_uuid_t uuid)
  45 {
  46         struct ptlrpc_connection *c;
  47         struct lustre_peer peer;
  48         int err;
  49
  50         err = kportal_uuid_to_peer(uuid, &peer);
  51         if (err != 0) {
  52                 CERROR("cannot find peer %s!\n", uuid);
  53                 return NULL;
  54         }
  55
  56         c = ptlrpc_get_connection(&peer, uuid);
  57         if (c) {
  58                 memcpy(c->c_remote_uuid, uuid, sizeof(c->c_remote_uuid));
  59                 c->c_epoch++;
  60         }
  61
  62         CDEBUG(D_INFO, "%s -> %p\n", uuid, c);
  63
  64         return c;
  65 }
  66
  67 void ptlrpc_readdress_connection(struct ptlrpc_connection *conn,obd_uuid_t uuid)
  68 {
  69         struct lustre_peer peer;
  70         int err;
  71
  72         err = kportal_uuid_to_peer(uuid, &peer);
  73         if (err != 0) {
  74                 CERROR("cannot find peer %s!\n", uuid);
  75                 return;
  76         }
  77
  78         memcpy(&conn->c_peer, &peer, sizeof(peer));
  79         return;
  80 }
  81
  82 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk(struct ptlrpc_connection *conn)
  83 {
  84         struct ptlrpc_bulk_desc *desc;
  85
  86         OBD_ALLOC(desc, sizeof(*desc));
  87         if (desc != NULL) {
  88                 desc->bd_connection = ptlrpc_connection_addref(conn);
  89                 atomic_set(&desc->bd_refcount, 1);
  90                 init_waitqueue_head(&desc->bd_waitq);
  91                 INIT_LIST_HEAD(&desc->bd_page_list);
  92                 ptl_set_inv_handle(&desc->bd_md_h);
  93                 ptl_set_inv_handle(&desc->bd_me_h);
  94         }
  95
  96         return desc;
  97 }
  98
  99 struct ptlrpc_bulk_page *ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc)
 100 {
 101         struct ptlrpc_bulk_page *bulk;
 102
 103         OBD_ALLOC(bulk, sizeof(*bulk));
 104         if (bulk != NULL) {
 105                 bulk->bp_desc = desc;
 106                 list_add_tail(&bulk->bp_link, &desc->bd_page_list);
 107                 desc->bd_page_count++;
 108         }
 109         return bulk;
 110 }
 111
 112 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *desc)
 113 {
 114         struct list_head *tmp, *next;
 115         ENTRY;
 116         if (desc == NULL) {
 117                 EXIT;
 118                 return;
 119         }
 120
 121         list_for_each_safe(tmp, next, &desc->bd_page_list) {
 122                 struct ptlrpc_bulk_page *bulk;
 123                 bulk = list_entry(tmp, struct ptlrpc_bulk_page, bp_link);
 124                 ptlrpc_free_bulk_page(bulk);
 125         }
 126
 127         ptlrpc_put_connection(desc->bd_connection);
 128
 129         OBD_FREE(desc, sizeof(*desc));
 130         EXIT;
 131 }
 132
 133 void ptlrpc_free_bulk_page(struct ptlrpc_bulk_page *bulk)
 134 {
 135         ENTRY;
 136         if (bulk == NULL) {
 137                 EXIT;
 138                 return;
 139         }
 140
 141         list_del(&bulk->bp_link);
 142         bulk->bp_desc->bd_page_count--;
 143         OBD_FREE(bulk, sizeof(*bulk));
 144         EXIT;
 145 }
 146
 147 struct ptlrpc_request *ptlrpc_prep_req(struct obd_import *imp, int opcode,
 148                                        int count, int *lengths, char **bufs)
 149 {
 150         struct ptlrpc_connection *conn = imp->imp_connection;
 151         struct ptlrpc_request *request;
 152         int rc;
 153         ENTRY;
 154
 155         OBD_ALLOC(request, sizeof(*request));
 156         if (!request) {
 157                 CERROR("request allocation out of memory\n");
 158                 RETURN(NULL);
 159         }
 160
 161         rc = lustre_pack_msg(count, lengths, bufs,
 162                              &request->rq_reqlen, &request->rq_reqmsg);
 163         if (rc) {
 164                 CERROR("cannot pack request %d\n", rc);
 165                 OBD_FREE(request, sizeof(*request));
 166                 RETURN(NULL);
 167         }
 168
 169         request->rq_level = LUSTRE_CONN_FULL;
 170         request->rq_type = PTL_RPC_MSG_REQUEST;
 171         request->rq_import = imp;
 172         request->rq_connection = ptlrpc_connection_addref(conn);
 173
 174         INIT_LIST_HEAD(&request->rq_list);
 175         /*
 176          * This will be reduced once when the sender is finished (waiting for
 177          * reply, f.e.), once when the request has been committed and is
 178          * removed from the to-be-committed list, and once when portals is
 179          * finished with it and has called request_out_callback.
 180          *
 181          * (Except in the DLM server case, where it will be dropped twice
 182          * by the sender, and then the last time by request_out_callback.)
 183          */
 184         atomic_set(&request->rq_refcount, 3);
 185
 186         spin_lock(&conn->c_lock);
 187         request->rq_xid = HTON__u32(++conn->c_xid_out);
 188         spin_unlock(&conn->c_lock);
 189
 190         request->rq_reqmsg->magic = PTLRPC_MSG_MAGIC;
 191         request->rq_reqmsg->version = PTLRPC_MSG_VERSION;
 192         request->rq_reqmsg->opc = HTON__u32(opcode);
 193
 194         ptlrpc_hdl2req(request, &imp->imp_handle);
 195         RETURN(request);
 196 }
 197
 198 void ptlrpc_req_finished(struct ptlrpc_request *request)
 199 {
 200         if (request == NULL)
 201                 return;
 202
 203         if (request->rq_repmsg != NULL) {
 204                 OBD_FREE(request->rq_repmsg, request->rq_replen);
 205                 request->rq_repmsg = NULL;
 206                 request->rq_reply_md.start = NULL;
 207         }
 208
 209         if (atomic_dec_and_test(&request->rq_refcount))
 210                 ptlrpc_free_req(request);
 211 }
 212
 213 void ptlrpc_free_req(struct ptlrpc_request *request)
 214 {
 215         ENTRY;
 216         if (request == NULL) {
 217                 EXIT;
 218                 return;
 219         }
 220
 221         if (request->rq_repmsg != NULL)
 222                 OBD_FREE(request->rq_repmsg, request->rq_replen);
 223         if (request->rq_reqmsg != NULL)
 224                 OBD_FREE(request->rq_reqmsg, request->rq_reqlen);
 225
 226         if (request->rq_connection) {
 227                 spin_lock(&request->rq_connection->c_lock);
 228                 list_del_init(&request->rq_list);
 229                 spin_unlock(&request->rq_connection->c_lock);
 230         }
 231
 232         ptlrpc_put_connection(request->rq_connection);
 233         OBD_FREE(request, sizeof(*request));
 234         EXIT;
 235 }
 236
 237 static int ptlrpc_check_reply(struct ptlrpc_request *req)
 238 {
 239         int rc = 0;
 240
 241         if (req->rq_repmsg != NULL) {
 242                 req->rq_transno = NTOH__u64(req->rq_repmsg->transno);
 243                 req->rq_flags |= PTL_RPC_FL_REPLIED;
 244                 GOTO(out, rc = 1);
 245         }
 246
 247         if (req->rq_flags & PTL_RPC_FL_RESEND) {
 248                 CERROR("-- RESTART --\n");
 249                 GOTO(out, rc = 1);
 250         }
 251
 252  out:
 253         CDEBUG(D_NET, "req = %p, rc = %d\n", req, rc);
 254         return rc;
 255 }
 256
 257 int ptlrpc_check_status(struct ptlrpc_request *req, int err)
 258 {
 259         ENTRY;
 260
 261         if (err != 0) {
 262                 CERROR("err is %d\n", err);
 263                 RETURN(err);
 264         }
 265
 266         if (req == NULL) {
 267                 CERROR("req == NULL\n");
 268                 RETURN(-ENOMEM);
 269         }
 270
 271         if (req->rq_repmsg == NULL) {
 272                 CERROR("req->rq_repmsg == NULL\n");
 273                 RETURN(-ENOMEM);
 274         }
 275
 276         err = req->rq_repmsg->status;
 277         if (req->rq_repmsg->type == NTOH__u32(PTL_RPC_MSG_ERR)) {
 278                 CERROR("req->rq_repmsg->type == PTL_RPC_MSG_ERR\n");
 279                 RETURN(err ? err : -EINVAL);
 280         }
 281
 282         if (err != 0) {
 283                 if (err < 0)
 284                         CERROR("req->rq_repmsg->status is %d\n", err);
 285                 else
 286                         CDEBUG(D_INFO, "req->rq_repmsg->status is %d\n", err);
 287                 /* XXX: translate this error from net to host */
 288                 RETURN(err);
 289         }
 290
 291         RETURN(0);
 292 }
 293
 294 static void ptlrpc_cleanup_request_buf(struct ptlrpc_request *request)
 295 {
 296         OBD_FREE(request->rq_reqmsg, request->rq_reqlen);
 297         request->rq_reqmsg = NULL;
 298         request->rq_reqlen = 0;
 299 }
 300
 301 /* Abort this request and cleanup any resources associated with it. */
 302 static int ptlrpc_abort(struct ptlrpc_request *request)
 303 {
 304         /* First remove the ME for the reply; in theory, this means
 305          * that we can tear down the buffer safely. */
 306         PtlMEUnlink(request->rq_reply_me_h);
 307         OBD_FREE(request->rq_reply_md.start, request->rq_replen);
 308         request->rq_repmsg = NULL;
 309         request->rq_replen = 0;
 310         return 0;
 311 }
 312
 313 /* caller must hold conn->c_lock */
 314 void ptlrpc_free_committed(struct ptlrpc_connection *conn)
 315 {
 316         struct list_head *tmp, *saved;
 317         struct ptlrpc_request *req;
 318
 319 restart:
 320         list_for_each_safe(tmp, saved, &conn->c_sending_head) {
 321                 req = list_entry(tmp, struct ptlrpc_request, rq_list);
 322
 323                 if (req->rq_flags & PTL_RPC_FL_REPLAY) {
 324                         CDEBUG(D_INFO, "Keeping req %p xid "LPD64" for replay\n",
 325                                req, req->rq_xid);
 326                         continue;
 327                 }
 328
 329                 if (!(req->rq_flags & PTL_RPC_FL_REPLIED)) {
 330                         CDEBUG(D_INFO, "Keeping in-flight req %p xid "LPD64
 331                                " for replay\n", req, req->rq_xid);
 332                         continue;
 333                 }
 334
 335                 /* not yet committed */
 336                 if (req->rq_transno > conn->c_last_committed)
 337                         break;
 338
 339                 CDEBUG(D_INFO, "Marking request %p xid %Ld as committed "
 340                        "transno=%Lu, last_committed=%Lu\n", req,
 341                        (long long)req->rq_xid, (long long)req->rq_transno,
 342                        (long long)conn->c_last_committed);
 343                 if (atomic_dec_and_test(&req->rq_refcount)) {
 344                         req->rq_import = NULL;
 345
 346                         /* We do this to prevent free_req deadlock.  Restarting
 347                          * after each removal is not so bad, as we are almost
 348                          * always deleting the first item in the list.
 349                          */
 350                         spin_unlock(&conn->c_lock);
 351                         ptlrpc_free_req(req);
 352                         spin_lock(&conn->c_lock);
 353                         goto restart;
 354                 } else {
 355                         list_del(&req->rq_list);
 356                         list_add(&req->rq_list, &conn->c_dying_head);
 357                 }
 358         }
 359
 360         EXIT;
 361         return;
 362 }
 363
 364 void ptlrpc_cleanup_client(struct obd_import *imp)
 365 {
 366         struct list_head *tmp, *saved;
 367         struct ptlrpc_request *req;
 368         struct ptlrpc_connection *conn = imp->imp_connection;
 369         ENTRY;
 370
 371         LASSERT(conn);
 372
 373 restart1:
 374         spin_lock(&conn->c_lock);
 375         list_for_each_safe(tmp, saved, &conn->c_sending_head) {
 376                 req = list_entry(tmp, struct ptlrpc_request, rq_list);
 377                 if (req->rq_import != imp)
 378                         continue;
 379                 CDEBUG(D_INFO, "Cleaning req %p from sending list.\n", req);
 380                 list_del_init(&req->rq_list);
 381                 req->rq_import = NULL;
 382                 spin_unlock(&conn->c_lock);
 383                 ptlrpc_free_req(req);
 384                 goto restart1;
 385         }
 386 restart2:
 387         list_for_each_safe(tmp, saved, &conn->c_dying_head) {
 388                 req = list_entry(tmp, struct ptlrpc_request, rq_list);
 389                 if (req->rq_import != imp)
 390                         continue;
 391                 CERROR("Request %p is on the dying list at cleanup!\n", req);
 392                 list_del_init(&req->rq_list);
 393                 req->rq_import = NULL;
 394                 spin_unlock(&conn->c_lock);
 395                 ptlrpc_free_req(req);
 396                 spin_lock(&conn->c_lock);
 397                 goto restart2;
 398         }
 399         spin_unlock(&conn->c_lock);
 400
 401         EXIT;
 402         return;
 403 }
 404
 405 void ptlrpc_continue_req(struct ptlrpc_request *req)
 406 {
 407         ENTRY;
 408         CDEBUG(D_INODE, "continue delayed request "LPD64" opc %d\n",
 409                req->rq_xid, req->rq_reqmsg->opc);
 410         req->rq_reqmsg->addr = req->rq_import->imp_handle.addr;
 411         req->rq_reqmsg->cookie = req->rq_import->imp_handle.cookie;
 412         wake_up(&req->rq_wait_for_rep);
 413         EXIT;
 414 }
 415
 416 void ptlrpc_resend_req(struct ptlrpc_request *req)
 417 {
 418         ENTRY;
 419         CDEBUG(D_INODE, "resend request "LPD64", opc %d\n",
 420                req->rq_xid, req->rq_reqmsg->opc);
 421         req->rq_reqmsg->addr = req->rq_import->imp_handle.addr;
 422         req->rq_reqmsg->cookie = req->rq_import->imp_handle.cookie;
 423         req->rq_status = -EAGAIN;
 424         req->rq_level = LUSTRE_CONN_RECOVD;
 425         req->rq_flags |= PTL_RPC_FL_RESEND;
 426         req->rq_flags &= ~PTL_RPC_FL_TIMEOUT;
 427         wake_up(&req->rq_wait_for_rep);
 428         EXIT;
 429 }
 430
 431 void ptlrpc_restart_req(struct ptlrpc_request *req)
 432 {
 433         ENTRY;
 434         CDEBUG(D_INODE, "restart completed request "LPD64", opc %d\n",
 435                req->rq_xid, req->rq_reqmsg->opc);
 436         req->rq_status = -ERESTARTSYS;
 437         req->rq_flags |= PTL_RPC_FL_RECOVERY;
 438         req->rq_flags &= ~PTL_RPC_FL_TIMEOUT;
 439         wake_up(&req->rq_wait_for_rep);
 440         EXIT;
 441 }
 442
 443 static int expired_request(void *data)
 444 {
 445         struct ptlrpc_request *req = data;
 446
 447         ENTRY;
 448         CERROR("req xid "LPD64" op %d: timeout on conn to %s:%d\n",
 449                (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
 450                req->rq_connection->c_remote_uuid,
 451                req->rq_import->imp_client->cli_request_portal);
 452         req->rq_flags |= PTL_RPC_FL_TIMEOUT;
 453         if (!req->rq_import->imp_connection->c_recovd_data.rd_recovd)
 454                 RETURN(1);
 455
 456         req->rq_timeout = 0;
 457         req->rq_connection->c_level = LUSTRE_CONN_RECOVD;
 458         recovd_conn_fail(req->rq_import->imp_connection);
 459
 460         /* If this request is for recovery or other primordial tasks,
 461          * don't go back to sleep.
 462          */
 463         if (req->rq_level < LUSTRE_CONN_FULL)
 464                 RETURN(1);
 465         RETURN(0);
 466 }
 467
 468 static int interrupted_request(void *data)
 469 {
 470         struct ptlrpc_request *req = data;
 471         ENTRY;
 472         req->rq_flags |= PTL_RPC_FL_INTR;
 473         RETURN(1); /* ignored, as of this writing */
 474 }
 475
 476 int ptlrpc_queue_wait(struct ptlrpc_request *req)
 477 {
 478         int rc = 0;
 479         struct l_wait_info lwi;
 480         struct ptlrpc_client *cli = req->rq_import->imp_client;
 481         struct ptlrpc_connection *conn = req->rq_import->imp_connection;
 482         ENTRY;
 483
 484         init_waitqueue_head(&req->rq_wait_for_rep);
 485         CDEBUG(D_NET, "subsys: %s req "LPD64" opc %d level %d, conn level %d\n",
 486                cli->cli_name, req->rq_xid, req->rq_reqmsg->opc, req->rq_level,
 487                req->rq_connection->c_level);
 488
 489         /* XXX probably both an import and connection level are needed */
 490         if (req->rq_level > conn->c_level) {
 491                 spin_lock(&conn->c_lock);
 492                 if (conn->c_flags & CONN_INVALID) {
 493                         /* being torn down by "umount -f" */
 494                         CERROR("req xid "LPD64" op %d to %s:%d: CONN_INVALID\n",
 495                                (unsigned long long)req->rq_xid,
 496                                req->rq_reqmsg->opc,
 497                                req->rq_connection->c_remote_uuid,
 498                                req->rq_import->imp_client->cli_request_portal);
 499                         spin_unlock(&conn->c_lock);
 500                         RETURN(-EIO);
 501                 }
 502                 list_del(&req->rq_list);
 503                 list_add_tail(&req->rq_list, &conn->c_delayed_head);
 504                 spin_unlock(&conn->c_lock);
 505
 506                 CERROR("req xid "LPD64" op %d to %s:%d: waiting for recovery "
 507                        "(%d < %d)\n",
 508                        (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
 509                        req->rq_connection->c_remote_uuid,
 510                        req->rq_import->imp_client->cli_request_portal,
 511                        req->rq_level, conn->c_level);
 512
 513                 lwi = LWI_INTR(NULL, NULL);
 514                 rc = l_wait_event(req->rq_wait_for_rep,
 515                                   (req->rq_level <= conn->c_level) ||
 516                                   (req->rq_flags & PTL_RPC_FL_ERR), &lwi);
 517
 518                 spin_lock(&conn->c_lock);
 519                 list_del_init(&req->rq_list);
 520                 spin_unlock(&conn->c_lock);
 521
 522                 if (req->rq_flags & PTL_RPC_FL_ERR)
 523                         RETURN(-EIO);
 524
 525                 if (rc)
 526                         RETURN(rc);
 527
 528                 CERROR("process %d resumed\n", current->pid);
 529         }
 530  resend:
 531         req->rq_timeout = obd_timeout;
 532         spin_lock(&conn->c_lock);
 533         if (conn->c_flags & CONN_INVALID) {
 534                 CERROR("req xid "LPD64" op %d to %s:%d: CONN_INVALID\n",
 535                        (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
 536                        req->rq_connection->c_remote_uuid,
 537                        req->rq_import->imp_client->cli_request_portal);
 538                 spin_unlock(&conn->c_lock); /* being torn down by "umount -f" */
 539                 RETURN(-EIO);
 540         }
 541
 542         list_del(&req->rq_list);
 543         list_add_tail(&req->rq_list, &conn->c_sending_head);
 544         spin_unlock(&conn->c_lock);
 545         rc = ptl_send_rpc(req);
 546         if (rc) {
 547                 CERROR("error %d, opcode %d, need recovery\n", rc,
 548                        req->rq_reqmsg->opc);
 549                 /* the sleep below will time out, triggering recovery */
 550         }
 551
 552         CDEBUG(D_OTHER, "-- sleeping on xid "LPD64"\n", req->rq_xid);
 553         lwi = LWI_TIMEOUT_INTR(req->rq_timeout * HZ, expired_request,
 554                                interrupted_request,req);
 555         l_wait_event(req->rq_wait_for_rep, ptlrpc_check_reply(req), &lwi);
 556         CDEBUG(D_OTHER, "-- done sleeping on xid "LPD64"\n", req->rq_xid);
 557
 558         /* Don't resend if we were interrupted. */
 559         if ((req->rq_flags & (PTL_RPC_FL_RESEND | PTL_RPC_FL_INTR)) ==
 560             PTL_RPC_FL_RESEND) {
 561                 req->rq_flags &= ~PTL_RPC_FL_RESEND;
 562                 CDEBUG(D_OTHER, "resending req %p xid "LPD64"\n",
 563                        req, req->rq_xid);
 564                 goto resend;
 565         }
 566
 567         // up(&cli->cli_rpc_sem);
 568         if (req->rq_flags & PTL_RPC_FL_INTR) {
 569                 if (!(req->rq_flags & PTL_RPC_FL_TIMEOUT))
 570                         LBUG(); /* should only be interrupted if we timed out */
 571                 /* Clean up the dangling reply buffers */
 572                 ptlrpc_abort(req);
 573                 GOTO(out, rc = -EINTR);
 574         }
 575
 576         if (req->rq_flags & PTL_RPC_FL_TIMEOUT)
 577                 GOTO(out, rc = -ETIMEDOUT);
 578
 579         if (!(req->rq_flags & PTL_RPC_FL_REPLIED))
 580                 GOTO(out, rc = req->rq_status);
 581
 582         rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen);
 583         if (rc) {
 584                 CERROR("unpack_rep failed: %d\n", rc);
 585                 GOTO(out, rc);
 586         }
 587 #if 0
 588         /* FIXME: Enable when BlueArc makes new release */
 589         if (req->rq_repmsg->type != PTL_RPC_MSG_REPLY &&
 590             req->rq_repmsg->type != PTL_RPC_MSG_ERR) {
 591                 CERROR("invalid packet type received (type=%u)\n",
 592                        req->rq_repmsg->type);
 593                 LBUG();
 594                 GOTO(out, rc = -EINVAL);
 595         }
 596 #endif
 597         CDEBUG(D_NET, "got rep "LPD64"\n", req->rq_xid);
 598         if (req->rq_repmsg->status == 0)
 599                 CDEBUG(D_NET, "--> buf %p len %d status %d\n", req->rq_repmsg,
 600                        req->rq_replen, req->rq_repmsg->status);
 601
 602         spin_lock(&conn->c_lock);
 603         conn->c_last_xid = req->rq_repmsg->last_xid;
 604         conn->c_last_committed = req->rq_repmsg->last_committed;
 605         ptlrpc_free_committed(conn);
 606         spin_unlock(&conn->c_lock);
 607
 608         EXIT;
 609  out:
 610         return rc;
 611 }
 612
 613 int ptlrpc_replay_req(struct ptlrpc_request *req)
 614 {
 615         int rc = 0;
 616         // struct ptlrpc_client *cli = req->rq_import->imp_client;
 617         struct l_wait_info lwi;
 618         ENTRY;
 619
 620         init_waitqueue_head(&req->rq_wait_for_rep);
 621         CDEBUG(D_NET, "req "LPD64" opc %d level %d, conn level %d\n",
 622                req->rq_xid, req->rq_reqmsg->opc, req->rq_level,
 623                req->rq_connection->c_level);
 624
 625         req->rq_timeout = obd_timeout;
 626         req->rq_reqmsg->addr = req->rq_import->imp_handle.addr;
 627         req->rq_reqmsg->cookie = req->rq_import->imp_handle.cookie;
 628         rc = ptl_send_rpc(req);
 629         if (rc) {
 630                 CERROR("error %d, opcode %d\n", rc, req->rq_reqmsg->opc);
 631                 ptlrpc_cleanup_request_buf(req);
 632                 // up(&cli->cli_rpc_sem);
 633                 RETURN(-rc);
 634         }
 635
 636         CDEBUG(D_OTHER, "-- sleeping\n");
 637         lwi = LWI_INTR(NULL, NULL);
 638         l_wait_event(req->rq_wait_for_rep, ptlrpc_check_reply(req), &lwi);
 639         CDEBUG(D_OTHER, "-- done\n");
 640
 641         // up(&cli->cli_rpc_sem);
 642
 643         if (!(req->rq_flags & PTL_RPC_FL_REPLIED)) {
 644                 CERROR("Unknown reason for wakeup\n");
 645                 /* XXX Phil - I end up here when I kill obdctl */
 646                 ptlrpc_abort(req);
 647                 GOTO(out, rc = -EINTR);
 648         }
 649
 650         rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen);
 651         if (rc) {
 652                 CERROR("unpack_rep failed: %d\n", rc);
 653                 GOTO(out, rc);
 654         }
 655
 656         CDEBUG(D_NET, "got rep "LPD64"\n", req->rq_xid);
 657         if (req->rq_repmsg->status == 0)
 658                 CDEBUG(D_NET, "--> buf %p len %d status %d\n", req->rq_repmsg,
 659                        req->rq_replen, req->rq_repmsg->status);
 660         else {
 661                 CERROR("recovery failed: ");
 662                 CERROR("req "LPD64" opc %d level %d, conn level %d\n",
 663                        req->rq_xid, req->rq_reqmsg->opc, req->rq_level,
 664                        req->rq_connection->c_level);
 665                 LBUG();
 666         }
 667
 668         if (req->rq_replay_cb)
 669                 req->rq_replay_cb(req, &req->rq_replay_cb_handle);
 670
 671  out:
 672         RETURN(rc);
 673 }