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         INIT_LIST_HEAD(&request->rq_multi);
 176         /* this will be dec()d once in req_finished, once in free_committed */
 177         atomic_set(&request->rq_refcount, 2);
 178
 179         spin_lock(&conn->c_lock);
 180         request->rq_xid = HTON__u32(++conn->c_xid_out);
 181         spin_unlock(&conn->c_lock);
 182
 183         request->rq_reqmsg->magic = PTLRPC_MSG_MAGIC;
 184         request->rq_reqmsg->version = PTLRPC_MSG_VERSION;
 185         request->rq_reqmsg->opc = HTON__u32(opcode);
 186
 187         ptlrpc_hdl2req(request, &imp->imp_handle);
 188         RETURN(request);
 189 }
 190
 191 void ptlrpc_req_finished(struct ptlrpc_request *request)
 192 {
 193         if (request == NULL)
 194                 return;
 195
 196         if (request->rq_repmsg != NULL) {
 197                 OBD_FREE(request->rq_repmsg, request->rq_replen);
 198                 request->rq_repmsg = NULL;
 199                 request->rq_reply_md.start = NULL;
 200         }
 201
 202         if (atomic_dec_and_test(&request->rq_refcount))
 203                 ptlrpc_free_req(request);
 204 }
 205
 206 void ptlrpc_free_req(struct ptlrpc_request *request)
 207 {
 208         ENTRY;
 209         if (request == NULL) {
 210                 EXIT;
 211                 return;
 212         }
 213
 214         if (request->rq_repmsg != NULL)
 215                 OBD_FREE(request->rq_repmsg, request->rq_replen);
 216         if (request->rq_reqmsg != NULL)
 217                 OBD_FREE(request->rq_reqmsg, request->rq_reqlen);
 218
 219         if (request->rq_connection) {
 220                 spin_lock(&request->rq_connection->c_lock);
 221                 list_del_init(&request->rq_list);
 222                 spin_unlock(&request->rq_connection->c_lock);
 223         }
 224
 225         ptlrpc_put_connection(request->rq_connection);
 226         list_del(&request->rq_multi);
 227         OBD_FREE(request, sizeof(*request));
 228         EXIT;
 229 }
 230
 231 static int ptlrpc_check_reply(struct ptlrpc_request *req)
 232 {
 233         int rc = 0;
 234
 235         if (req->rq_repmsg != NULL) {
 236                 req->rq_transno = NTOH__u64(req->rq_repmsg->transno);
 237                 req->rq_flags |= PTL_RPC_FL_REPLIED;
 238                 GOTO(out, rc = 1);
 239         }
 240
 241         if (req->rq_flags & PTL_RPC_FL_RESEND) {
 242                 CERROR("-- RESTART --\n");
 243                 GOTO(out, rc = 1);
 244         }
 245
 246  out:
 247         CDEBUG(D_NET, "req = %p, rc = %d\n", req, rc);
 248         return rc;
 249 }
 250
 251 int ptlrpc_check_status(struct ptlrpc_request *req, int err)
 252 {
 253         ENTRY;
 254
 255         if (err != 0) {
 256                 CERROR("err is %d\n", err);
 257                 RETURN(err);
 258         }
 259
 260         if (req == NULL) {
 261                 CERROR("req == NULL\n");
 262                 RETURN(-ENOMEM);
 263         }
 264
 265         if (req->rq_repmsg == NULL) {
 266                 CERROR("req->rq_repmsg == NULL\n");
 267                 RETURN(-ENOMEM);
 268         }
 269
 270         err = req->rq_repmsg->status;
 271         if (req->rq_repmsg->type == NTOH__u32(PTL_RPC_MSG_ERR)) {
 272                 CERROR("req->rq_repmsg->type == PTL_RPC_MSG_ERR\n");
 273                 RETURN(err ? err : -EINVAL);
 274         }
 275
 276         if (err != 0) {
 277                 if (err < 0)
 278                         CERROR("req->rq_repmsg->status is %d\n", err);
 279                 else
 280                         CDEBUG(D_INFO, "req->rq_repmsg->status is %d\n", err);
 281                 /* XXX: translate this error from net to host */
 282                 RETURN(err);
 283         }
 284
 285         RETURN(0);
 286 }
 287
 288 static void ptlrpc_cleanup_request_buf(struct ptlrpc_request *request)
 289 {
 290         OBD_FREE(request->rq_reqmsg, request->rq_reqlen);
 291         request->rq_reqmsg = NULL;
 292         request->rq_reqlen = 0;
 293 }
 294
 295 /* Abort this request and cleanup any resources associated with it. */
 296 static int ptlrpc_abort(struct ptlrpc_request *request)
 297 {
 298         /* First remove the ME for the reply; in theory, this means
 299          * that we can tear down the buffer safely. */
 300         PtlMEUnlink(request->rq_reply_me_h);
 301         OBD_FREE(request->rq_reply_md.start, request->rq_replen);
 302         request->rq_repmsg = NULL;
 303         request->rq_replen = 0;
 304         return 0;
 305 }
 306
 307 /* caller must hold conn->c_lock */
 308 void ptlrpc_free_committed(struct ptlrpc_connection *conn)
 309 {
 310         struct list_head *tmp, *saved;
 311         struct ptlrpc_request *req;
 312
 313 restart:
 314         list_for_each_safe(tmp, saved, &conn->c_sending_head) {
 315                 req = list_entry(tmp, struct ptlrpc_request, rq_list);
 316
 317                 if (req->rq_flags & PTL_RPC_FL_REPLAY) {
 318                         CDEBUG(D_INFO, "Keeping req %p xid "LPD64" for replay\n",
 319                                req, req->rq_xid);
 320                         continue;
 321                 }
 322
 323                 if (!(req->rq_flags & PTL_RPC_FL_REPLIED)) {
 324                         CDEBUG(D_INFO, "Keeping in-flight req %p xid "LPD64
 325                                " for replay\n", req, req->rq_xid);
 326                         continue;
 327                 }
 328
 329                 /* not yet committed */
 330                 if (req->rq_transno > conn->c_last_committed)
 331                         break;
 332
 333                 CDEBUG(D_INFO, "Marking request %p xid %Ld as committed "
 334                        "transno=%Lu, last_committed=%Lu\n", req,
 335                        (long long)req->rq_xid, (long long)req->rq_transno,
 336                        (long long)conn->c_last_committed);
 337                 if (atomic_dec_and_test(&req->rq_refcount)) {
 338                         req->rq_import = NULL;
 339
 340                         /* We do this to prevent free_req deadlock.  Restarting
 341                          * after each removal is not so bad, as we are almost
 342                          * always deleting the first item in the list.
 343                          */
 344                         spin_unlock(&conn->c_lock);
 345                         ptlrpc_free_req(req);
 346                         spin_lock(&conn->c_lock);
 347                         goto restart;
 348                 } else {
 349                         list_del(&req->rq_list);
 350                         list_add(&req->rq_list, &conn->c_dying_head);
 351                 }
 352         }
 353
 354         EXIT;
 355         return;
 356 }
 357
 358 void ptlrpc_cleanup_client(struct obd_import *imp)
 359 {
 360         struct list_head *tmp, *saved;
 361         struct ptlrpc_request *req;
 362         struct ptlrpc_connection *conn = imp->imp_connection;
 363         ENTRY;
 364
 365         LASSERT(conn);
 366
 367 restart1:
 368         spin_lock(&conn->c_lock);
 369         list_for_each_safe(tmp, saved, &conn->c_sending_head) {
 370                 req = list_entry(tmp, struct ptlrpc_request, rq_list);
 371                 if (req->rq_import != imp)
 372                         continue;
 373                 CDEBUG(D_INFO, "Cleaning req %p from sending list.\n", req);
 374                 list_del_init(&req->rq_list);
 375                 req->rq_import = NULL;
 376                 spin_unlock(&conn->c_lock);
 377                 ptlrpc_free_req(req);
 378                 goto restart1;
 379         }
 380 restart2:
 381         list_for_each_safe(tmp, saved, &conn->c_dying_head) {
 382                 req = list_entry(tmp, struct ptlrpc_request, rq_list);
 383                 if (req->rq_import != imp)
 384                         continue;
 385                 CERROR("Request %p is on the dying list at cleanup!\n", req);
 386                 list_del_init(&req->rq_list);
 387                 req->rq_import = NULL;
 388                 spin_unlock(&conn->c_lock);
 389                 ptlrpc_free_req(req);
 390                 spin_lock(&conn->c_lock);
 391                 goto restart2;
 392         }
 393         spin_unlock(&conn->c_lock);
 394
 395         EXIT;
 396         return;
 397 }
 398
 399 void ptlrpc_continue_req(struct ptlrpc_request *req)
 400 {
 401         ENTRY;
 402         CDEBUG(D_INODE, "continue delayed request "LPD64" opc %d\n",
 403                req->rq_xid, req->rq_reqmsg->opc);
 404         req->rq_reqmsg->addr = req->rq_import->imp_handle.addr;
 405         req->rq_reqmsg->cookie = req->rq_import->imp_handle.cookie;
 406         wake_up(&req->rq_wait_for_rep);
 407         EXIT;
 408 }
 409
 410 void ptlrpc_resend_req(struct ptlrpc_request *req)
 411 {
 412         ENTRY;
 413         CDEBUG(D_INODE, "resend request "LPD64", opc %d\n",
 414                req->rq_xid, req->rq_reqmsg->opc);
 415         req->rq_reqmsg->addr = req->rq_import->imp_handle.addr;
 416         req->rq_reqmsg->cookie = req->rq_import->imp_handle.cookie;
 417         req->rq_status = -EAGAIN;
 418         req->rq_level = LUSTRE_CONN_RECOVD;
 419         req->rq_flags |= PTL_RPC_FL_RESEND;
 420         req->rq_flags &= ~PTL_RPC_FL_TIMEOUT;
 421         wake_up(&req->rq_wait_for_rep);
 422         EXIT;
 423 }
 424
 425 void ptlrpc_restart_req(struct ptlrpc_request *req)
 426 {
 427         ENTRY;
 428         CDEBUG(D_INODE, "restart completed request "LPD64", opc %d\n",
 429                req->rq_xid, req->rq_reqmsg->opc);
 430         req->rq_status = -ERESTARTSYS;
 431         req->rq_flags |= PTL_RPC_FL_RECOVERY;
 432         req->rq_flags &= ~PTL_RPC_FL_TIMEOUT;
 433         wake_up(&req->rq_wait_for_rep);
 434         EXIT;
 435 }
 436
 437 static int expired_request(void *data)
 438 {
 439         struct ptlrpc_request *req = data;
 440
 441         ENTRY;
 442         CERROR("req timeout on connid %d xid %Ld\n", req->rq_connid,
 443                (unsigned long long)req->rq_xid);
 444         req->rq_flags |= PTL_RPC_FL_TIMEOUT;
 445         if (!req->rq_import->imp_connection->c_recovd_data.rd_recovd)
 446                 RETURN(1);
 447
 448         req->rq_timeout = 0;
 449         req->rq_connection->c_level = LUSTRE_CONN_RECOVD;
 450         recovd_conn_fail(req->rq_import->imp_connection);
 451
 452         /* If this request is for recovery or other primordial tasks,
 453          * don't go back to sleep.
 454          */
 455         if (req->rq_level < LUSTRE_CONN_FULL)
 456                 RETURN(1);
 457         RETURN(0);
 458 }
 459
 460 static int interrupted_request(void *data)
 461 {
 462         struct ptlrpc_request *req = data;
 463         ENTRY;
 464         req->rq_flags |= PTL_RPC_FL_INTR;
 465         RETURN(1); /* ignored, as of this writing */
 466 }
 467
 468 int ptlrpc_queue_wait(struct ptlrpc_request *req)
 469 {
 470         int rc = 0;
 471         struct l_wait_info lwi;
 472         struct ptlrpc_client *cli = req->rq_import->imp_client;
 473         struct ptlrpc_connection *conn = req->rq_import->imp_connection;
 474         ENTRY;
 475
 476         init_waitqueue_head(&req->rq_wait_for_rep);
 477         CDEBUG(D_NET, "subsys: %s req "LPD64" opc %d level %d, conn level %d\n",
 478                cli->cli_name, req->rq_xid, req->rq_reqmsg->opc, req->rq_level,
 479                req->rq_connection->c_level);
 480
 481         /* XXX probably both an import and connection level are needed */
 482         if (req->rq_level > conn->c_level) {
 483                 CERROR("process %d waiting for recovery (%d > %d)\n",
 484                        current->pid, req->rq_level, conn->c_level);
 485
 486                 spin_lock(&conn->c_lock);
 487                 list_del(&req->rq_list);
 488                 list_add_tail(&req->rq_list, &conn->c_delayed_head);
 489                 spin_unlock(&conn->c_lock);
 490
 491                 lwi = LWI_INTR(NULL, NULL);
 492                 rc = l_wait_event(req->rq_wait_for_rep,
 493                                   req->rq_level <= conn->c_level, &lwi);
 494
 495                 spin_lock(&conn->c_lock);
 496                 list_del_init(&req->rq_list);
 497                 spin_unlock(&conn->c_lock);
 498
 499                 if (rc)
 500                         RETURN(rc);
 501
 502                 CERROR("process %d resumed\n", current->pid);
 503         }
 504  resend:
 505         req->rq_time = CURRENT_TIME;
 506         req->rq_timeout = obd_timeout;
 507         spin_lock(&conn->c_lock);
 508         list_del(&req->rq_list);
 509         list_add_tail(&req->rq_list, &conn->c_sending_head);
 510         spin_unlock(&conn->c_lock);
 511         rc = ptl_send_rpc(req);
 512         if (rc) {
 513                 CERROR("error %d, opcode %d, need recovery\n", rc,
 514                        req->rq_reqmsg->opc);
 515                 /* the sleep below will time out, triggering recovery */
 516         }
 517
 518         CDEBUG(D_OTHER, "-- sleeping\n");
 519         lwi = LWI_TIMEOUT_INTR(req->rq_timeout * HZ, expired_request,
 520                                interrupted_request,req);
 521         l_wait_event(req->rq_wait_for_rep, ptlrpc_check_reply(req), &lwi);
 522         CDEBUG(D_OTHER, "-- done\n");
 523
 524         /* Don't resend if we were interrupted. */
 525         if ((req->rq_flags & (PTL_RPC_FL_RESEND | PTL_RPC_FL_INTR)) ==
 526             PTL_RPC_FL_RESEND) {
 527                 req->rq_flags &= ~PTL_RPC_FL_RESEND;
 528                 CDEBUG(D_OTHER, "resending req %p xid "LPD64"\n",
 529                        req, req->rq_xid);
 530                 goto resend;
 531         }
 532
 533         // up(&cli->cli_rpc_sem);
 534         if (req->rq_flags & PTL_RPC_FL_INTR) {
 535                 if (!(req->rq_flags & PTL_RPC_FL_TIMEOUT))
 536                         LBUG(); /* should only be interrupted if we timed out */
 537                 /* Clean up the dangling reply buffers */
 538                 ptlrpc_abort(req);
 539                 GOTO(out, rc = -EINTR);
 540         }
 541
 542         if (req->rq_flags & PTL_RPC_FL_TIMEOUT)
 543                 GOTO(out, rc = -ETIMEDOUT);
 544
 545         if (!(req->rq_flags & PTL_RPC_FL_REPLIED))
 546                 GOTO(out, rc = req->rq_status);
 547
 548         rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen);
 549         if (rc) {
 550                 CERROR("unpack_rep failed: %d\n", rc);
 551                 GOTO(out, rc);
 552         }
 553 #if 0
 554         /* FIXME: Enable when BlueArc makes new release */
 555         if (req->rq_repmsg->type != PTL_RPC_MSG_REPLY &&
 556             req->rq_repmsg->type != PTL_RPC_MSG_ERR) {
 557                 CERROR("invalid packet type received (type=%u)\n",
 558                        req->rq_repmsg->type);
 559                 LBUG();
 560                 GOTO(out, rc = -EINVAL);
 561         }
 562 #endif
 563         CDEBUG(D_NET, "got rep "LPD64"\n", req->rq_xid);
 564         if (req->rq_repmsg->status == 0)
 565                 CDEBUG(D_NET, "--> buf %p len %d status %d\n", req->rq_repmsg,
 566                        req->rq_replen, req->rq_repmsg->status);
 567
 568         spin_lock(&conn->c_lock);
 569         conn->c_last_xid = req->rq_repmsg->last_xid;
 570         conn->c_last_committed = req->rq_repmsg->last_committed;
 571         ptlrpc_free_committed(conn);
 572         spin_unlock(&conn->c_lock);
 573
 574         EXIT;
 575  out:
 576         return rc;
 577 }
 578
 579 int ptlrpc_replay_req(struct ptlrpc_request *req)
 580 {
 581         int rc = 0;
 582         // struct ptlrpc_client *cli = req->rq_import->imp_client;
 583         struct l_wait_info lwi;
 584         ENTRY;
 585
 586         init_waitqueue_head(&req->rq_wait_for_rep);
 587         CDEBUG(D_NET, "req "LPD64" opc %d level %d, conn level %d\n",
 588                req->rq_xid, req->rq_reqmsg->opc, req->rq_level,
 589                req->rq_connection->c_level);
 590
 591         req->rq_time = CURRENT_TIME;
 592         req->rq_timeout = obd_timeout;
 593         req->rq_reqmsg->addr = req->rq_import->imp_handle.addr;
 594         req->rq_reqmsg->cookie = req->rq_import->imp_handle.cookie;
 595         rc = ptl_send_rpc(req);
 596         if (rc) {
 597                 CERROR("error %d, opcode %d\n", rc, req->rq_reqmsg->opc);
 598                 ptlrpc_cleanup_request_buf(req);
 599                 // up(&cli->cli_rpc_sem);
 600                 RETURN(-rc);
 601         }
 602
 603         CDEBUG(D_OTHER, "-- sleeping\n");
 604         lwi = LWI_INTR(NULL, NULL);
 605         l_wait_event(req->rq_wait_for_rep, ptlrpc_check_reply(req), &lwi);
 606         CDEBUG(D_OTHER, "-- done\n");
 607
 608         // up(&cli->cli_rpc_sem);
 609
 610         if (!(req->rq_flags & PTL_RPC_FL_REPLIED)) {
 611                 CERROR("Unknown reason for wakeup\n");
 612                 /* XXX Phil - I end up here when I kill obdctl */
 613                 ptlrpc_abort(req);
 614                 GOTO(out, rc = -EINTR);
 615         }
 616
 617         rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen);
 618         if (rc) {
 619                 CERROR("unpack_rep failed: %d\n", rc);
 620                 GOTO(out, rc);
 621         }
 622
 623         CDEBUG(D_NET, "got rep "LPD64"\n", req->rq_xid);
 624         if (req->rq_repmsg->status == 0)
 625                 CDEBUG(D_NET, "--> buf %p len %d status %d\n", req->rq_repmsg,
 626                        req->rq_replen, req->rq_repmsg->status);
 627         else {
 628                 CERROR("recovery failed: ");
 629                 CERROR("req "LPD64" opc %d level %d, conn level %d\n",
 630                        req->rq_xid, req->rq_reqmsg->opc, req->rq_level,
 631                        req->rq_connection->c_level);
 632                 LBUG();
 633         }
 634
 635         if (req->rq_replay_cb)
 636                 req->rq_replay_cb(req, req->rq_replay_cb_data);
 637
 638  out:
 639         RETURN(rc);
 640 }