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
 173         /* XXX FIXME bug 625069 */
 174         request->rq_request_portal = imp->imp_client->cli_request_portal;
 175         request->rq_reply_portal = imp->imp_client->cli_reply_portal;
 176
 177         request->rq_connection = ptlrpc_connection_addref(conn);
 178
 179         INIT_LIST_HEAD(&request->rq_list);
 180         /*
 181          * This will be reduced once when the sender is finished (waiting for
 182          * reply, f.e.), and once when the request has been committed and is
 183          * removed from the to-be-committed list.
 184          *
 185          * Also, the refcount will be increased in ptl_send_rpc immediately
 186          * before we hand it off to portals, and there will be a corresponding
 187          * decrease in request_out_cb (which is called to indicate that portals
 188          * is finished with the request, and it can be safely freed).
 189          *
 190          * (Except in the DLM server case, where it will be dropped twice
 191          * by the sender, and then the last time by request_out_callback.)
 192          */
 193         atomic_set(&request->rq_refcount, 2);
 194
 195         spin_lock(&conn->c_lock);
 196         request->rq_xid = HTON__u32(++conn->c_xid_out);
 197         spin_unlock(&conn->c_lock);
 198
 199         request->rq_reqmsg->magic = PTLRPC_MSG_MAGIC;
 200         request->rq_reqmsg->opc = HTON__u32(opcode);
 201         request->rq_reqmsg->flags = 0;
 202
 203         ptlrpc_hdl2req(request, &imp->imp_handle);
 204         RETURN(request);
 205 }
 206
 207 void ptlrpc_req_finished(struct ptlrpc_request *request)
 208 {
 209         if (request == NULL)
 210                 return;
 211
 212         if (atomic_dec_and_test(&request->rq_refcount))
 213                 ptlrpc_free_req(request);
 214 }
 215
 216 void ptlrpc_free_req(struct ptlrpc_request *request)
 217 {
 218         ENTRY;
 219         if (request == NULL) {
 220                 EXIT;
 221                 return;
 222         }
 223
 224         if (atomic_read(&request->rq_refcount) != 0) {
 225                 CERROR("freeing request %p (%d->%s:%d) with refcount %d\n",
 226                        request, request->rq_reqmsg->opc,
 227                        request->rq_connection->c_remote_uuid,
 228                        request->rq_import->imp_client->cli_request_portal,
 229                        request->rq_refcount);
 230                 /* LBUG(); */
 231         }
 232
 233         if (request->rq_repmsg != NULL) {
 234                 OBD_FREE(request->rq_repmsg, request->rq_replen);
 235                 request->rq_repmsg = NULL;
 236                 request->rq_reply_md.start = NULL;
 237         }
 238         if (request->rq_reqmsg != NULL) {
 239                 OBD_FREE(request->rq_reqmsg, request->rq_reqlen);
 240                 request->rq_reqmsg = NULL;
 241         }
 242
 243         if (request->rq_connection) {
 244                 spin_lock(&request->rq_connection->c_lock);
 245                 list_del_init(&request->rq_list);
 246                 spin_unlock(&request->rq_connection->c_lock);
 247         }
 248
 249         ptlrpc_put_connection(request->rq_connection);
 250         OBD_FREE(request, sizeof(*request));
 251         EXIT;
 252 }
 253
 254 static int ptlrpc_check_reply(struct ptlrpc_request *req)
 255 {
 256         int rc = 0;
 257
 258         if (req->rq_repmsg != NULL) {
 259                 struct ptlrpc_connection *conn = req->rq_import->imp_connection;
 260                 if (req->rq_level > conn->c_level) {
 261                         CDEBUG(D_HA,
 262                                "rep to xid "LPD64" op %d to %s:%d: "
 263                                "recovery started, ignoring (%d > %d)\n",
 264                                (unsigned long long)req->rq_xid,
 265                                req->rq_reqmsg->opc, conn->c_remote_uuid,
 266                                req->rq_import->imp_client->cli_request_portal,
 267                                req->rq_level, conn->c_level);
 268                         req->rq_repmsg = NULL;
 269                         GOTO(out, rc = 0);
 270                 }
 271                 req->rq_transno = NTOH__u64(req->rq_repmsg->transno);
 272                 req->rq_flags |= PTL_RPC_FL_REPLIED;
 273                 GOTO(out, rc = 1);
 274         }
 275
 276         if (req->rq_flags & PTL_RPC_FL_RESEND) {
 277                 CERROR("-- RESTART --\n");
 278                 GOTO(out, rc = 1);
 279         }
 280
 281         if (req->rq_flags & PTL_RPC_FL_ERR) {
 282                 CERROR("-- ABORTED --\n");
 283                 GOTO(out, rc = 1);
 284         }
 285
 286  out:
 287         CDEBUG(D_NET, "req = %p, rc = %d\n", req, rc);
 288         return rc;
 289 }
 290
 291 int ptlrpc_check_status(struct ptlrpc_request *req, int err)
 292 {
 293         ENTRY;
 294
 295         if (err != 0) {
 296                 CERROR("err is %d\n", err);
 297                 RETURN(err);
 298         }
 299
 300         if (req == NULL) {
 301                 CERROR("req == NULL\n");
 302                 RETURN(-ENOMEM);
 303         }
 304
 305         if (req->rq_repmsg == NULL) {
 306                 CERROR("req->rq_repmsg == NULL\n");
 307                 RETURN(-ENOMEM);
 308         }
 309
 310         err = req->rq_repmsg->status;
 311         if (req->rq_repmsg->type == NTOH__u32(PTL_RPC_MSG_ERR)) {
 312                 CERROR("req->rq_repmsg->type == PTL_RPC_MSG_ERR\n");
 313                 RETURN(err ? err : -EINVAL);
 314         }
 315
 316         if (err != 0) {
 317                 if (err < 0)
 318                         CERROR("req->rq_repmsg->status is %d\n", err);
 319                 else
 320                         CDEBUG(D_INFO, "req->rq_repmsg->status is %d\n", err);
 321                 /* XXX: translate this error from net to host */
 322                 RETURN(err);
 323         }
 324
 325         RETURN(0);
 326 }
 327
 328 static void ptlrpc_cleanup_request_buf(struct ptlrpc_request *request)
 329 {
 330         OBD_FREE(request->rq_reqmsg, request->rq_reqlen);
 331         request->rq_reqmsg = NULL;
 332         request->rq_reqlen = 0;
 333 }
 334
 335 /* Abort this request and cleanup any resources associated with it. */
 336 static int ptlrpc_abort(struct ptlrpc_request *request)
 337 {
 338         /* First remove the ME for the reply; in theory, this means
 339          * that we can tear down the buffer safely. */
 340         PtlMEUnlink(request->rq_reply_me_h);
 341         OBD_FREE(request->rq_reply_md.start, request->rq_replen);
 342         request->rq_repmsg = NULL;
 343         request->rq_replen = 0;
 344         return 0;
 345 }
 346
 347 /* caller must hold conn->c_lock */
 348 void ptlrpc_free_committed(struct ptlrpc_connection *conn)
 349 {
 350         struct list_head *tmp, *saved;
 351         struct ptlrpc_request *req;
 352
 353 restart:
 354         list_for_each_safe(tmp, saved, &conn->c_sending_head) {
 355                 req = list_entry(tmp, struct ptlrpc_request, rq_list);
 356
 357                 if (req->rq_flags & PTL_RPC_FL_REPLAY) {
 358                         CDEBUG(D_INFO, "Keeping req %p xid "LPD64" for replay\n",
 359                                req, req->rq_xid);
 360                         continue;
 361                 }
 362
 363                 if (!(req->rq_flags & PTL_RPC_FL_REPLIED)) {
 364                         CDEBUG(D_INFO, "Keeping in-flight req %p xid "LPD64
 365                                " for replay\n", req, req->rq_xid);
 366                         continue;
 367                 }
 368
 369                 /* not yet committed */
 370                 if (req->rq_transno > conn->c_last_committed)
 371                         break;
 372
 373                 CDEBUG(D_INFO, "Marking request %p xid %Ld as committed "
 374                        "transno=%Lu, last_committed=%Lu\n", req,
 375                        (long long)req->rq_xid, (long long)req->rq_transno,
 376                        (long long)conn->c_last_committed);
 377                 if (atomic_dec_and_test(&req->rq_refcount)) {
 378                         /* We do this to prevent free_req deadlock.
 379                          * Restarting after each removal is not so bad, as we are
 380                          * almost always deleting the first item in the list.
 381                          *
 382                          * If we use a recursive lock here, we can skip the
 383                          * unlock/lock/restart sequence.
 384                          */
 385                         spin_unlock(&conn->c_lock);
 386                         ptlrpc_free_req(req);
 387                         spin_lock(&conn->c_lock);
 388                         goto restart;
 389                 } else {
 390                         list_del(&req->rq_list);
 391                         list_add(&req->rq_list, &conn->c_dying_head);
 392                 }
 393         }
 394
 395         EXIT;
 396         return;
 397 }
 398
 399 void ptlrpc_cleanup_client(struct obd_import *imp)
 400 {
 401         struct list_head *tmp, *saved;
 402         struct ptlrpc_request *req;
 403         struct ptlrpc_connection *conn = imp->imp_connection;
 404         ENTRY;
 405
 406         LASSERT(conn);
 407
 408 restart1:
 409         spin_lock(&conn->c_lock);
 410         list_for_each_safe(tmp, saved, &conn->c_sending_head) {
 411                 req = list_entry(tmp, struct ptlrpc_request, rq_list);
 412                 if (req->rq_import != imp)
 413                         continue;
 414                 /* XXX we should make sure that nobody's sleeping on these! */
 415                 CDEBUG(D_INFO, "Cleaning req %p from sending list.\n", req);
 416                 list_del_init(&req->rq_list);
 417                 req->rq_import = NULL;
 418                 spin_unlock(&conn->c_lock);
 419                 ptlrpc_req_finished(req);
 420                 goto restart1;
 421         }
 422 restart2:
 423         list_for_each_safe(tmp, saved, &conn->c_dying_head) {
 424                 req = list_entry(tmp, struct ptlrpc_request, rq_list);
 425                 if (req->rq_import != imp)
 426                         continue;
 427                 CERROR("Request %p is on the dying list at cleanup!\n", req);
 428                 list_del_init(&req->rq_list);
 429                 req->rq_import = NULL;
 430                 spin_unlock(&conn->c_lock);
 431                 ptlrpc_req_finished(req);
 432                 spin_lock(&conn->c_lock);
 433                 goto restart2;
 434         }
 435         spin_unlock(&conn->c_lock);
 436
 437         EXIT;
 438         return;
 439 }
 440
 441 void ptlrpc_continue_req(struct ptlrpc_request *req)
 442 {
 443         ENTRY;
 444         CDEBUG(D_HA, "continue delayed request "LPD64" opc %d\n",
 445                req->rq_xid, req->rq_reqmsg->opc);
 446         req->rq_reqmsg->addr = req->rq_import->imp_handle.addr;
 447         req->rq_reqmsg->cookie = req->rq_import->imp_handle.cookie;
 448         wake_up(&req->rq_wait_for_rep);
 449         EXIT;
 450 }
 451
 452 void ptlrpc_resend_req(struct ptlrpc_request *req)
 453 {
 454         ENTRY;
 455         CDEBUG(D_HA, "resend request "LPD64", opc %d\n",
 456                req->rq_xid, req->rq_reqmsg->opc);
 457         req->rq_reqmsg->addr = req->rq_import->imp_handle.addr;
 458         req->rq_reqmsg->cookie = req->rq_import->imp_handle.cookie;
 459         req->rq_status = -EAGAIN;
 460         req->rq_level = LUSTRE_CONN_RECOVD;
 461         req->rq_flags |= PTL_RPC_FL_RESEND;
 462         req->rq_flags &= ~PTL_RPC_FL_TIMEOUT;
 463         wake_up(&req->rq_wait_for_rep);
 464         EXIT;
 465 }
 466
 467 void ptlrpc_restart_req(struct ptlrpc_request *req)
 468 {
 469         ENTRY;
 470         CDEBUG(D_HA, "restart completed request "LPD64", opc %d\n",
 471                req->rq_xid, req->rq_reqmsg->opc);
 472         req->rq_status = -ERESTARTSYS;
 473         req->rq_flags |= PTL_RPC_FL_RECOVERY;
 474         req->rq_flags &= ~PTL_RPC_FL_TIMEOUT;
 475         wake_up(&req->rq_wait_for_rep);
 476         EXIT;
 477 }
 478
 479 static int expired_request(void *data)
 480 {
 481         struct ptlrpc_request *req = data;
 482
 483         ENTRY;
 484         CERROR("req xid "LPD64" op %d: timeout on conn to %s:%d\n",
 485                (unsigned long long)req->rq_xid, req->rq_reqmsg->opc,
 486                req->rq_connection->c_remote_uuid,
 487                req->rq_import->imp_client->cli_request_portal);
 488         req->rq_flags |= PTL_RPC_FL_TIMEOUT;
 489         if (!req->rq_import->imp_connection->c_recovd_data.rd_recovd)
 490                 RETURN(1);
 491
 492         req->rq_timeout = 0;
 493         req->rq_connection->c_level = LUSTRE_CONN_RECOVD;
 494         recovd_conn_fail(req->rq_import->imp_connection);
 495
 496         /* If this request is for recovery or other primordial tasks,
 497          * don't go back to sleep.
 498          */
 499         if (req->rq_level < LUSTRE_CONN_FULL)
 500                 RETURN(1);
 501         RETURN(0);
 502 }
 503
 504 static int interrupted_request(void *data)
 505 {
 506         struct ptlrpc_request *req = data;
 507         ENTRY;
 508         req->rq_flags |= PTL_RPC_FL_INTR;
 509         RETURN(1); /* ignored, as of this writing */
 510 }
 511
 512 /* If we're being torn down by umount -f, or the import has been
 513  * invalidated (such as by an OST failure), the request must fail with
 514  * -EIO.
 515  *
 516  * Must be called with conn->c_lock held, will drop it if it returns -EIO.
 517  *
 518  * XXX this should just be testing the import, and umount_begin shouldn't touch
 519  * XXX the connection.
 520  */
 521 #define EIO_IF_INVALID(conn, req)                                             \
 522 if ((conn->c_flags & CONN_INVALID) ||                                         \
 523     (req->rq_import->imp_flags & IMP_INVALID)) {                              \
 524         DEBUG_REQ(D_ERROR, req, "%s_INVALID:",                                \
 525                   (conn->c_flags & CONN_INVALID) ? "CONN" : "IMP");           \
 526         spin_unlock(&conn->c_lock);                                           \
 527         RETURN(-EIO);                                                         \
 528 }
 529
 530 int ptlrpc_queue_wait(struct ptlrpc_request *req)
 531 {
 532         int rc = 0;
 533         struct l_wait_info lwi;
 534         struct ptlrpc_client *cli = req->rq_import->imp_client;
 535         struct ptlrpc_connection *conn = req->rq_import->imp_connection;
 536         ENTRY;
 537
 538         init_waitqueue_head(&req->rq_wait_for_rep);
 539         DEBUG_REQ(D_HA, req, "subsys: %s:", cli->cli_name);
 540
 541         /* XXX probably both an import and connection level are needed */
 542         if (req->rq_level > conn->c_level) {
 543                 spin_lock(&conn->c_lock);
 544                 EIO_IF_INVALID(conn, req);
 545                 list_del(&req->rq_list);
 546                 list_add_tail(&req->rq_list, &conn->c_delayed_head);
 547                 spin_unlock(&conn->c_lock);
 548
 549                 DEBUG_REQ(D_HA, req, "waiting for recovery: (%d < %d)",
 550                           req->rq_level, conn->c_level);
 551                 lwi = LWI_INTR(NULL, NULL);
 552                 rc = l_wait_event(req->rq_wait_for_rep,
 553                                   (req->rq_level <= conn->c_level) ||
 554                                   (req->rq_flags & PTL_RPC_FL_ERR), &lwi);
 555
 556                 spin_lock(&conn->c_lock);
 557                 list_del_init(&req->rq_list);
 558                 spin_unlock(&conn->c_lock);
 559
 560                 if (req->rq_flags & PTL_RPC_FL_ERR)
 561                         RETURN(-EIO);
 562
 563                 if (rc)
 564                         RETURN(rc);
 565
 566                 CERROR("process %d resumed\n", current->pid);
 567         }
 568  resend:
 569         req->rq_timeout = obd_timeout;
 570         spin_lock(&conn->c_lock);
 571         EIO_IF_INVALID(conn, req);
 572
 573         list_del(&req->rq_list);
 574         list_add_tail(&req->rq_list, &conn->c_sending_head);
 575         spin_unlock(&conn->c_lock);
 576         rc = ptl_send_rpc(req);
 577         if (rc) {
 578                 CDEBUG(D_HA, "error %d, opcode %d, need recovery\n", rc,
 579                        req->rq_reqmsg->opc);
 580                 /* the sleep below will time out, triggering recovery */
 581         }
 582
 583         DEBUG_REQ(D_NET, req, "-- sleeping");
 584         lwi = LWI_TIMEOUT_INTR(req->rq_timeout * HZ, expired_request,
 585                                interrupted_request,req);
 586         l_wait_event(req->rq_wait_for_rep, ptlrpc_check_reply(req), &lwi);
 587         DEBUG_REQ(D_NET, req, "-- done sleeping");
 588
 589         if (req->rq_flags & PTL_RPC_FL_ERR) {
 590                 ptlrpc_abort(req);
 591                 GOTO(out, rc = -EIO);
 592         }
 593
 594         /* Don't resend if we were interrupted. */
 595         if ((req->rq_flags & (PTL_RPC_FL_RESEND | PTL_RPC_FL_INTR)) ==
 596             PTL_RPC_FL_RESEND) {
 597                 req->rq_flags &= ~PTL_RPC_FL_RESEND;
 598                 DEBUG_REQ(D_HA, req, "resending: ");
 599                 goto resend;
 600         }
 601
 602         // up(&cli->cli_rpc_sem);
 603         if (req->rq_flags & PTL_RPC_FL_INTR) {
 604                 if (!(req->rq_flags & PTL_RPC_FL_TIMEOUT))
 605                         LBUG(); /* should only be interrupted if we timed out */
 606                 /* Clean up the dangling reply buffers */
 607                 ptlrpc_abort(req);
 608                 GOTO(out, rc = -EINTR);
 609         }
 610
 611         if (req->rq_flags & PTL_RPC_FL_TIMEOUT)
 612                 GOTO(out, rc = -ETIMEDOUT);
 613
 614         if (!(req->rq_flags & PTL_RPC_FL_REPLIED))
 615                 GOTO(out, rc = req->rq_status);
 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 #if 0
 623         /* FIXME: Enable when BlueArc makes new release */
 624         if (req->rq_repmsg->type != PTL_RPC_MSG_REPLY &&
 625             req->rq_repmsg->type != PTL_RPC_MSG_ERR) {
 626                 CERROR("invalid packet type received (type=%u)\n",
 627                        req->rq_repmsg->type);
 628                 LBUG();
 629                 GOTO(out, rc = -EINVAL);
 630         }
 631 #endif
 632         CDEBUG(D_NET, "got rep "LPD64"\n", req->rq_xid);
 633         if (req->rq_repmsg->status == 0)
 634                 CDEBUG(D_NET, "--> buf %p len %d status %d\n", req->rq_repmsg,
 635                        req->rq_replen, req->rq_repmsg->status);
 636
 637         spin_lock(&conn->c_lock);
 638         conn->c_last_xid = req->rq_repmsg->last_xid;
 639         conn->c_last_committed = req->rq_repmsg->last_committed;
 640         ptlrpc_free_committed(conn);
 641         spin_unlock(&conn->c_lock);
 642
 643         EXIT;
 644  out:
 645         return rc;
 646 }
 647
 648 #undef EIO_IF_INVALID
 649
 650 int ptlrpc_replay_req(struct ptlrpc_request *req)
 651 {
 652         int rc = 0, old_level;
 653         // struct ptlrpc_client *cli = req->rq_import->imp_client;
 654         struct l_wait_info lwi;
 655         ENTRY;
 656
 657         init_waitqueue_head(&req->rq_wait_for_rep);
 658         CDEBUG(D_NET, "req "LPD64" opc %d level %d, conn level %d\n",
 659                req->rq_xid, req->rq_reqmsg->opc, req->rq_level,
 660                req->rq_connection->c_level);
 661
 662         req->rq_timeout = obd_timeout;
 663         req->rq_reqmsg->addr = req->rq_import->imp_handle.addr;
 664         req->rq_reqmsg->cookie = req->rq_import->imp_handle.cookie;
 665
 666         /* temporarily set request to RECOVD level (reset at out:) */
 667         old_level = req->rq_level;
 668         req->rq_level = LUSTRE_CONN_RECOVD;
 669         rc = ptl_send_rpc(req);
 670         if (rc) {
 671                 CERROR("error %d, opcode %d\n", rc, req->rq_reqmsg->opc);
 672                 ptlrpc_cleanup_request_buf(req);
 673                 // up(&cli->cli_rpc_sem);
 674                 GOTO(out, rc = -rc);
 675         }
 676
 677         CDEBUG(D_OTHER, "-- sleeping\n");
 678         lwi = LWI_INTR(NULL, NULL); /* XXX needs timeout, nested recovery */
 679         l_wait_event(req->rq_wait_for_rep, ptlrpc_check_reply(req), &lwi);
 680         CDEBUG(D_OTHER, "-- done\n");
 681
 682         // up(&cli->cli_rpc_sem);
 683
 684         if (!(req->rq_flags & PTL_RPC_FL_REPLIED)) {
 685                 CERROR("Unknown reason for wakeup\n");
 686                 /* XXX Phil - I end up here when I kill obdctl */
 687                 ptlrpc_abort(req);
 688                 GOTO(out, rc = -EINTR);
 689         }
 690
 691         rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen);
 692         if (rc) {
 693                 CERROR("unpack_rep failed: %d\n", rc);
 694                 GOTO(out, rc);
 695         }
 696
 697         CDEBUG(D_NET, "got rep "LPD64"\n", req->rq_xid);
 698
 699         /* let the callback do fixups, possibly including in the request */
 700         if (req->rq_replay_cb)
 701                 req->rq_replay_cb(req);
 702
 703         if (req->rq_repmsg->status == 0) {
 704                 CDEBUG(D_NET, "--> buf %p len %d status %d\n", req->rq_repmsg,
 705                        req->rq_replen, req->rq_repmsg->status);
 706         } else {
 707                 CERROR("recovery failed: ");
 708                 CERROR("req "LPD64" opc %d level %d, conn level %d\n",
 709                        req->rq_xid, req->rq_reqmsg->opc, req->rq_level,
 710                        req->rq_connection->c_level);
 711                 LBUG();
 712         }
 713
 714  out:
 715         req->rq_level = old_level;
 716         RETURN(rc);
 717 }