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/lustre_lib.h>
  27 #include <linux/lustre_ha.h>
  28
  29 void ptlrpc_init_client(struct recovd_obd *recovd,
  30                         int (*recover)(struct ptlrpc_client *recover),
  31                         int req_portal,
  32                         int rep_portal, struct ptlrpc_client *cl)
  33 {
  34         memset(cl, 0, sizeof(*cl));
  35         cl->cli_recovd = recovd;
  36         cl->cli_recover = recover;
  37         if (recovd)
  38                 recovd_cli_manage(recovd, cl);
  39         cl->cli_obd = NULL;
  40         cl->cli_request_portal = req_portal;
  41         cl->cli_reply_portal = rep_portal;
  42         INIT_LIST_HEAD(&cl->cli_delayed_head);
  43         INIT_LIST_HEAD(&cl->cli_sending_head);
  44         INIT_LIST_HEAD(&cl->cli_dying_head);
  45         spin_lock_init(&cl->cli_lock);
  46         sema_init(&cl->cli_rpc_sem, 32);
  47 }
  48
  49 __u8 *ptlrpc_req_to_uuid(struct ptlrpc_request *req)
  50 {
  51         return req->rq_connection->c_remote_uuid;
  52 }
  53
  54 struct ptlrpc_connection *ptlrpc_uuid_to_connection(char *uuid)
  55 {
  56         struct ptlrpc_connection *c;
  57         struct lustre_peer peer;
  58         int err;
  59
  60         err = kportal_uuid_to_peer(uuid, &peer);
  61         if (err != 0) {
  62                 CERROR("cannot find peer %s!\n", uuid);
  63                 return NULL;
  64         }
  65
  66         c = ptlrpc_get_connection(&peer);
  67         if (c) {
  68                 memcpy(c->c_remote_uuid, uuid, sizeof(c->c_remote_uuid));
  69                 c->c_epoch++;
  70         }
  71
  72         return c;
  73 }
  74
  75 void ptlrpc_readdress_connection(struct ptlrpc_connection *conn, char *uuid)
  76 {
  77         struct lustre_peer peer;
  78         int err;
  79
  80         err = kportal_uuid_to_peer(uuid, &peer);
  81         if (err != 0) {
  82                 CERROR("cannot find peer %s!\n", uuid);
  83                 return;
  84         }
  85
  86         memcpy(&conn->c_peer, &peer, sizeof(peer));
  87         return;
  88 }
  89
  90 struct ptlrpc_bulk_desc *ptlrpc_prep_bulk(struct ptlrpc_connection *conn)
  91 {
  92         struct ptlrpc_bulk_desc *desc;
  93
  94         OBD_ALLOC(desc, sizeof(*desc));
  95         if (desc != NULL) {
  96                 desc->b_connection = ptlrpc_connection_addref(conn);
  97                 atomic_set(&desc->b_pages_remaining, 0);
  98                 atomic_set(&desc->b_refcount, 1);
  99                 init_waitqueue_head(&desc->b_waitq);
 100                 INIT_LIST_HEAD(&desc->b_page_list);
 101         }
 102
 103         return desc;
 104 }
 105
 106 struct ptlrpc_bulk_page *ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc)
 107 {
 108         struct ptlrpc_bulk_page *bulk;
 109
 110         OBD_ALLOC(bulk, sizeof(*bulk));
 111         if (bulk != NULL) {
 112                 bulk->b_desc = desc;
 113                 ptl_set_inv_handle(&bulk->b_md_h);
 114                 ptl_set_inv_handle(&bulk->b_me_h);
 115                 list_add_tail(&bulk->b_link, &desc->b_page_list);
 116                 desc->b_page_count++;
 117                 atomic_inc(&desc->b_pages_remaining);
 118         }
 119         return bulk;
 120 }
 121
 122 void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *desc)
 123 {
 124         struct list_head *tmp, *next;
 125         ENTRY;
 126         if (desc == NULL) {
 127                 EXIT;
 128                 return;
 129         }
 130
 131         list_for_each_safe(tmp, next, &desc->b_page_list) {
 132                 struct ptlrpc_bulk_page *bulk;
 133                 bulk = list_entry(tmp, struct ptlrpc_bulk_page, b_link);
 134                 ptlrpc_free_bulk_page(bulk);
 135         }
 136
 137         ptlrpc_put_connection(desc->b_connection);
 138
 139         OBD_FREE(desc, sizeof(*desc));
 140         EXIT;
 141 }
 142
 143 void ptlrpc_free_bulk_page(struct ptlrpc_bulk_page *bulk)
 144 {
 145         ENTRY;
 146         if (bulk == NULL) {
 147                 EXIT;
 148                 return;
 149         }
 150
 151         list_del(&bulk->b_link);
 152         bulk->b_desc->b_page_count--;
 153         OBD_FREE(bulk, sizeof(*bulk));
 154         EXIT;
 155 }
 156
 157 struct ptlrpc_request *ptlrpc_prep_req(struct ptlrpc_client *cl,
 158                                        struct ptlrpc_connection *conn,
 159                                        int opcode, int count, int *lengths,
 160                                        char **bufs)
 161 {
 162         struct ptlrpc_request *request;
 163         int rc;
 164         ENTRY;
 165
 166         OBD_ALLOC(request, sizeof(*request));
 167         if (!request) {
 168                 CERROR("request allocation out of memory\n");
 169                 RETURN(NULL);
 170         }
 171
 172         rc = lustre_pack_msg(count, lengths, bufs,
 173                              &request->rq_reqlen, &request->rq_reqmsg);
 174         if (rc) {
 175                 CERROR("cannot pack request %d\n", rc);
 176                 OBD_FREE(request, sizeof(*request));
 177                 RETURN(NULL);
 178         }
 179
 180         request->rq_level = LUSTRE_CONN_FULL;
 181         request->rq_type = PTL_RPC_TYPE_REQUEST;
 182         request->rq_client = cl;
 183         request->rq_connection = ptlrpc_connection_addref(conn);
 184
 185         INIT_LIST_HEAD(&request->rq_list);
 186         INIT_LIST_HEAD(&request->rq_multi);
 187         /* this will be dec()d once in req_finished, once in free_committed */
 188         atomic_set(&request->rq_refcount, 2);
 189
 190         spin_lock(&conn->c_lock);
 191         request->rq_xid = HTON__u32(++conn->c_xid_out);
 192         spin_unlock(&conn->c_lock);
 193
 194         request->rq_reqmsg->magic = PTLRPC_MSG_MAGIC;
 195         request->rq_reqmsg->version = PTLRPC_MSG_VERSION;
 196         request->rq_reqmsg->opc = HTON__u32(opcode);
 197         request->rq_reqmsg->type = HTON__u32(PTL_RPC_MSG_REQUEST);
 198
 199         RETURN(request);
 200 }
 201 struct ptlrpc_request *ptlrpc_prep_req2(struct ptlrpc_client *cl,
 202                                         struct ptlrpc_connection *conn,
 203                                         struct lustre_handle *handle,
 204                                        int opcode, int count, int *lengths,
 205                                        char **bufs)
 206 {
 207         struct ptlrpc_request *req;
 208         req = ptlrpc_prep_req(cl, conn, opcode, count, lengths, bufs);
 209         ptlrpc_hdl2req(req, handle);
 210         return req;
 211 }
 212
 213 void ptlrpc_req_finished(struct ptlrpc_request *request)
 214 {
 215         if (request == NULL)
 216                 return;
 217
 218         if (request->rq_repmsg != NULL) {
 219                 OBD_FREE(request->rq_repmsg, request->rq_replen);
 220                 request->rq_repmsg = NULL;
 221                 request->rq_reply_md.start = NULL;
 222         }
 223
 224         if (atomic_dec_and_test(&request->rq_refcount))
 225                 ptlrpc_free_req(request);
 226 }
 227
 228 void ptlrpc_free_req(struct ptlrpc_request *request)
 229 {
 230         ENTRY;
 231         if (request == NULL) {
 232                 EXIT;
 233                 return;
 234         }
 235
 236         if (request->rq_repmsg != NULL)
 237                 OBD_FREE(request->rq_repmsg, request->rq_replen);
 238         if (request->rq_reqmsg != NULL)
 239                 OBD_FREE(request->rq_reqmsg, request->rq_reqlen);
 240
 241         if (request->rq_client) {
 242                 spin_lock(&request->rq_client->cli_lock);
 243                 list_del_init(&request->rq_list);
 244                 spin_unlock(&request->rq_client->cli_lock);
 245         }
 246
 247         ptlrpc_put_connection(request->rq_connection);
 248         list_del(&request->rq_multi);
 249         OBD_FREE(request, sizeof(*request));
 250         EXIT;
 251 }
 252
 253 static int ptlrpc_check_reply(struct ptlrpc_request *req)
 254 {
 255         int rc = 0;
 256
 257         if (req->rq_repmsg != NULL) {
 258                 req->rq_transno = NTOH__u64(req->rq_repmsg->transno);
 259                 req->rq_flags |= PTL_RPC_FL_REPLIED;
 260                 GOTO(out, rc = 1);
 261         }
 262
 263         if (req->rq_flags & PTL_RPC_FL_RESEND) {
 264                 if (l_killable_pending(current)) {
 265                         CERROR("-- INTR --\n");
 266                         req->rq_flags |= PTL_RPC_FL_INTR;
 267                         GOTO(out, rc = 1);
 268                 }
 269                 CERROR("-- RESEND --\n");
 270                 GOTO(out, rc = 1);
 271         }
 272
 273         if (req->rq_flags & PTL_RPC_FL_RECOVERY) {
 274                 CERROR("-- RESTART --\n");
 275                 GOTO(out, rc = 1);
 276         }
 277
 278         if (req->rq_flags & PTL_RPC_FL_TIMEOUT && l_killable_pending(current)) {
 279                 req->rq_flags |= PTL_RPC_FL_INTR;
 280                 GOTO(out, rc = 1);
 281         }
 282
 283         if (req->rq_timeout &&
 284             (CURRENT_TIME - req->rq_time >= req->rq_timeout)) {
 285                 CERROR("-- REQ TIMEOUT ON CONNID %d XID %Ld --\n",
 286                        req->rq_connid, (unsigned long long)req->rq_xid);
 287                 /* clear the timeout */
 288                 req->rq_timeout = 0;
 289                 req->rq_connection->c_level = LUSTRE_CONN_RECOVD;
 290                 req->rq_flags |= PTL_RPC_FL_TIMEOUT;
 291                 if (req->rq_client && req->rq_client->cli_recovd)
 292                         recovd_cli_fail(req->rq_client);
 293                 if (req->rq_level < LUSTRE_CONN_FULL) {
 294                         rc = 1;
 295                 } else if (l_killable_pending(current)) {
 296                         req->rq_flags |= PTL_RPC_FL_INTR;
 297                         rc = 1;
 298                 } else {
 299                         rc = 0;
 300                 }
 301                 GOTO(out, rc);
 302         }
 303
 304  out:
 305         CDEBUG(D_NET, "req = %p, rc = %d\n", req, rc);
 306         return rc;
 307 }
 308
 309 int ptlrpc_check_status(struct ptlrpc_request *req, int err)
 310 {
 311         ENTRY;
 312
 313         if (err != 0) {
 314                 CERROR("err is %d\n", err);
 315                 RETURN(err);
 316         }
 317
 318         if (req == NULL) {
 319                 CERROR("req == NULL\n");
 320                 RETURN(-ENOMEM);
 321         }
 322
 323         if (req->rq_repmsg == NULL) {
 324                 CERROR("req->rq_repmsg == NULL\n");
 325                 RETURN(-ENOMEM);
 326         }
 327
 328         if (req->rq_repmsg->type == NTOH__u32(PTL_RPC_MSG_ERR)) {
 329                 CERROR("req->rq_repmsg->type == PTL_RPC_MSG_ERR\n");
 330                 RETURN(-EINVAL);
 331         }
 332
 333         if (req->rq_repmsg->status != 0) {
 334                 if (req->rq_repmsg->status < 0)
 335                         CERROR("req->rq_repmsg->status is %d\n",
 336                                req->rq_repmsg->status);
 337                 else
 338                         CDEBUG(D_INFO, "req->rq_repmsg->status is %d\n",
 339                                req->rq_repmsg->status);
 340                 /* XXX: translate this error from net to host */
 341                 RETURN(req->rq_repmsg->status);
 342         }
 343
 344         RETURN(0);
 345 }
 346
 347 static void ptlrpc_cleanup_request_buf(struct ptlrpc_request *request)
 348 {
 349         OBD_FREE(request->rq_reqmsg, request->rq_reqlen);
 350         request->rq_reqmsg = NULL;
 351         request->rq_reqlen = 0;
 352 }
 353
 354 /* Abort this request and cleanup any resources associated with it. */
 355 static int ptlrpc_abort(struct ptlrpc_request *request)
 356 {
 357         /* First remove the ME for the reply; in theory, this means
 358          * that we can tear down the buffer safely. */
 359         PtlMEUnlink(request->rq_reply_me_h);
 360         OBD_FREE(request->rq_reply_md.start, request->rq_replen);
 361         request->rq_repmsg = NULL;
 362         request->rq_replen = 0;
 363         return 0;
 364 }
 365
 366 /* caller must lock cli */
 367 void ptlrpc_free_committed(struct ptlrpc_client *cli)
 368 {
 369         struct list_head *tmp, *saved;
 370         struct ptlrpc_request *req;
 371
 372         list_for_each_safe(tmp, saved, &cli->cli_sending_head) {
 373                 req = list_entry(tmp, struct ptlrpc_request, rq_list);
 374
 375                 if ( (req->rq_flags & PTL_RPC_FL_REPLAY) ) {
 376                         CDEBUG(D_INFO, "Retaining request %Ld for replay\n",
 377                                req->rq_xid);
 378                         continue;
 379                 }
 380
 381                 /* not yet committed */
 382                 if (req->rq_transno > cli->cli_last_committed)
 383                         break;
 384
 385                 CDEBUG(D_INFO, "Marking request %Ld as committed ("
 386                        "transno=%Lu, last_committed=%Lu\n",
 387                        req->rq_xid, req->rq_transno,
 388                        cli->cli_last_committed);
 389                 if (atomic_dec_and_test(&req->rq_refcount)) {
 390                         /* we do this to prevent free_req deadlock */
 391                         list_del_init(&req->rq_list);
 392                         req->rq_client = NULL;
 393                         ptlrpc_free_req(req);
 394                 } else {
 395                         list_del_init(&req->rq_list);
 396                         list_add(&req->rq_list, &cli->cli_dying_head);
 397                 }
 398         }
 399
 400         EXIT;
 401         return;
 402 }
 403
 404 void ptlrpc_cleanup_client(struct ptlrpc_client *cli)
 405 {
 406         struct list_head *tmp, *saved;
 407         struct ptlrpc_request *req;
 408         ENTRY;
 409
 410         spin_lock(&cli->cli_lock);
 411         list_for_each_safe(tmp, saved, &cli->cli_sending_head) {
 412                 req = list_entry(tmp, struct ptlrpc_request, rq_list);
 413                 CDEBUG(D_INFO, "Cleaning req %p from sending list.\n", req);
 414                 list_del_init(&req->rq_list);
 415                 req->rq_client = NULL;
 416                 ptlrpc_free_req(req);
 417         }
 418         list_for_each_safe(tmp, saved, &cli->cli_dying_head) {
 419                 req = list_entry(tmp, struct ptlrpc_request, rq_list);
 420                 CERROR("Request %p is on the dying list at cleanup!\n", req);
 421                 list_del_init(&req->rq_list);
 422                 req->rq_client = NULL;
 423                 ptlrpc_free_req(req);
 424         }
 425         spin_unlock(&cli->cli_lock);
 426
 427         EXIT;
 428         return;
 429 }
 430
 431 void ptlrpc_continue_req(struct ptlrpc_request *req)
 432 {
 433         ENTRY;
 434         CDEBUG(D_INODE, "continue delayed request %Ld opc %d\n",
 435                req->rq_xid, req->rq_reqmsg->opc);
 436         wake_up(&req->rq_wait_for_rep);
 437         EXIT;
 438 }
 439
 440 void ptlrpc_resend_req(struct ptlrpc_request *req)
 441 {
 442         ENTRY;
 443         CDEBUG(D_INODE, "resend request %Ld, opc %d\n",
 444                req->rq_xid, req->rq_reqmsg->opc);
 445         req->rq_status = -EAGAIN;
 446         req->rq_level = LUSTRE_CONN_RECOVD;
 447         req->rq_flags |= PTL_RPC_FL_RESEND;
 448         req->rq_flags &= ~PTL_RPC_FL_TIMEOUT;
 449         wake_up(&req->rq_wait_for_rep);
 450         EXIT;
 451 }
 452
 453 void ptlrpc_restart_req(struct ptlrpc_request *req)
 454 {
 455         ENTRY;
 456         CDEBUG(D_INODE, "restart completed request %Ld, opc %d\n",
 457                req->rq_xid, req->rq_reqmsg->opc);
 458         req->rq_status = -ERESTARTSYS;
 459         req->rq_flags |= PTL_RPC_FL_RECOVERY;
 460         req->rq_flags &= ~PTL_RPC_FL_TIMEOUT;
 461         wake_up(&req->rq_wait_for_rep);
 462         EXIT;
 463 }
 464
 465 int ptlrpc_queue_wait(struct ptlrpc_request *req)
 466 {
 467         int rc = 0, timeout;
 468         struct ptlrpc_client *cli = req->rq_client;
 469         ENTRY;
 470
 471         init_waitqueue_head(&req->rq_wait_for_rep);
 472         CDEBUG(D_NET, "subsys: %s req %Ld opc %d level %d, conn level %d\n",
 473                cli->cli_name, req->rq_xid, req->rq_reqmsg->opc, req->rq_level,
 474                req->rq_connection->c_level);
 475
 476         /* XXX probably both an import and connection level are needed */
 477         if (req->rq_level > req->rq_connection->c_level) {
 478                 CERROR("process %d waiting for recovery (%d > %d)\n",
 479                        current->pid, req->rq_level, req->rq_connection->c_level);
 480                 spin_lock(&cli->cli_lock);
 481                 list_del_init(&req->rq_list);
 482                 list_add(&req->rq_list, cli->cli_delayed_head.prev);
 483                 spin_unlock(&cli->cli_lock);
 484                 l_wait_event_killable
 485                         (req->rq_wait_for_rep,
 486                          req->rq_level <= req->rq_connection->c_level);
 487                 spin_lock(&cli->cli_lock);
 488                 list_del_init(&req->rq_list);
 489                 spin_unlock(&cli->cli_lock);
 490                 CERROR("process %d resumed\n", current->pid);
 491         }
 492  resend:
 493         req->rq_time = CURRENT_TIME;
 494         req->rq_timeout = 100;
 495         rc = ptl_send_rpc(req);
 496         if (rc) {
 497                 CERROR("error %d, opcode %d\n", rc, req->rq_reqmsg->opc);
 498                 if ( rc > 0 )
 499                         rc = -rc;
 500                 ptlrpc_cleanup_request_buf(req);
 501                 up(&cli->cli_rpc_sem);
 502                 RETURN(-rc);
 503         }
 504
 505         spin_lock(&cli->cli_lock);
 506         list_del_init(&req->rq_list);
 507         list_add_tail(&req->rq_list, &cli->cli_sending_head);
 508         spin_unlock(&cli->cli_lock);
 509
 510         CDEBUG(D_OTHER, "-- sleeping\n");
 511         /*
 512          * req->rq_timeout gets reset in the timeout case, and
 513          * l_wait_event_timeout is a macro, so save the timeout value here.
 514          */
 515         timeout = req->rq_timeout * HZ;
 516         l_wait_event_timeout(req->rq_wait_for_rep, ptlrpc_check_reply(req),
 517                              timeout);
 518         CDEBUG(D_OTHER, "-- done\n");
 519
 520         if (req->rq_flags & PTL_RPC_FL_RESEND) {
 521                 req->rq_flags &= ~PTL_RPC_FL_RESEND;
 522                 goto resend;
 523         }
 524
 525         up(&cli->cli_rpc_sem);
 526         if (req->rq_flags & PTL_RPC_FL_INTR) {
 527                 /* Clean up the dangling reply buffers */
 528                 ptlrpc_abort(req);
 529                 GOTO(out, rc = -EINTR);
 530         }
 531
 532         if (req->rq_flags & PTL_RPC_FL_TIMEOUT)
 533                 GOTO(out, rc = -ETIMEDOUT);
 534
 535         if (!(req->rq_flags & PTL_RPC_FL_REPLIED))
 536                 GOTO(out, rc = req->rq_status);
 537
 538         rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen);
 539         if (rc) {
 540                 CERROR("unpack_rep failed: %d\n", rc);
 541                 GOTO(out, rc);
 542         }
 543         CDEBUG(D_NET, "got rep %Ld\n", req->rq_xid);
 544         if (req->rq_repmsg->status == 0)
 545                 CDEBUG(D_NET, "--> buf %p len %d status %d\n", req->rq_repmsg,
 546                        req->rq_replen, req->rq_repmsg->status);
 547
 548         spin_lock(&cli->cli_lock);
 549         cli->cli_last_rcvd = req->rq_repmsg->last_rcvd;
 550         cli->cli_last_committed = req->rq_repmsg->last_committed;
 551         ptlrpc_free_committed(cli);
 552         spin_unlock(&cli->cli_lock);
 553
 554         EXIT;
 555  out:
 556         return rc;
 557 }
 558
 559 int ptlrpc_replay_req(struct ptlrpc_request *req)
 560 {
 561         int rc = 0;
 562         struct ptlrpc_client *cli = req->rq_client;
 563         ENTRY;
 564
 565         init_waitqueue_head(&req->rq_wait_for_rep);
 566         CDEBUG(D_NET, "req %Ld opc %d level %d, conn level %d\n",
 567                req->rq_xid, req->rq_reqmsg->opc, req->rq_level,
 568                req->rq_connection->c_level);
 569
 570         req->rq_time = CURRENT_TIME;
 571         req->rq_timeout = 100;
 572         rc = ptl_send_rpc(req);
 573         if (rc) {
 574                 CERROR("error %d, opcode %d\n", rc, req->rq_reqmsg->opc);
 575                 ptlrpc_cleanup_request_buf(req);
 576                 up(&cli->cli_rpc_sem);
 577                 RETURN(-rc);
 578         }
 579
 580         CDEBUG(D_OTHER, "-- sleeping\n");
 581         l_wait_event_killable(req->rq_wait_for_rep, ptlrpc_check_reply(req));
 582         CDEBUG(D_OTHER, "-- done\n");
 583
 584         up(&cli->cli_rpc_sem);
 585
 586         if (!(req->rq_flags & PTL_RPC_FL_REPLIED)) {
 587                 CERROR("Unknown reason for wakeup\n");
 588                 /* XXX Phil - I end up here when I kill obdctl */
 589                 ptlrpc_abort(req);
 590                 GOTO(out, rc = -EINTR);
 591         }
 592
 593         rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen);
 594         if (rc) {
 595                 CERROR("unpack_rep failed: %d\n", rc);
 596                 GOTO(out, rc);
 597         }
 598
 599         CDEBUG(D_NET, "got rep %Ld\n", req->rq_xid);
 600         if (req->rq_repmsg->status == 0)
 601                 CDEBUG(D_NET, "--> buf %p len %d status %d\n", req->rq_repmsg,
 602                        req->rq_replen, req->rq_repmsg->status);
 603         else {
 604                 CERROR("recovery failed: ");
 605                 CERROR("req %Ld opc %d level %d, conn level %d\n",
 606                        req->rq_xid, req->rq_reqmsg->opc, req->rq_level,
 607                        req->rq_connection->c_level);
 608                 LBUG();
 609         }
 610
 611  out:
 612         RETURN(rc);
 613 }