lustre/ost/ost_handler.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
   5  *   Author: Peter J. Braam <braam@clusterfs.com>
   6  *   Author: Phil Schwan <phil@clusterfs.com>
   7  *
   8  *   This file is part of Lustre, http://www.lustre.org.
   9  *
  10  *   Lustre is free software; you can redistribute it and/or
  11  *   modify it under the terms of version 2 of the GNU General Public
  12  *   License as published by the Free Software Foundation.
  13  *
  14  *   Lustre is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with Lustre; if not, write to the Free Software
  21  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  *  Storage Target Handling functions
  24  *  Lustre Object Server Module (OST)
  25  *
  26  *  This server is single threaded at present (but can easily be multi
  27  *  threaded). For testing and management it is treated as an
  28  *  obd_device, although it does not export a full OBD method table
  29  *  (the requests are coming in over the wire, so object target
  30  *  modules do not have a full method table.)
  31  */
  32
  33 #ifndef EXPORT_SYMTAB
  34 # define EXPORT_SYMTAB
  35 #endif
  36 #define DEBUG_SUBSYSTEM S_OST
  37
  38 #include <linux/module.h>
  39 #include <linux/obd_ost.h>
  40 #include <linux/lustre_net.h>
  41 #include <linux/lustre_dlm.h>
  42 #include <linux/lustre_export.h>
  43 #include <linux/lustre_debug.h>
  44 #include <linux/init.h>
  45 #include <linux/lprocfs_status.h>
  46 #include <linux/lustre_commit_confd.h>
  47 #include <libcfs/list.h>
  48 #include "ost_internal.h"
  49
  50 void oti_init(struct obd_trans_info *oti, struct ptlrpc_request *req)
  51 {
  52         if (oti == NULL)
  53                 return;
  54         memset(oti, 0, sizeof *oti);
  55
  56         if (req->rq_repmsg && req->rq_reqmsg != 0)
  57                 oti->oti_transno = req->rq_repmsg->transno;
  58 }
  59
  60 void oti_to_request(struct obd_trans_info *oti, struct ptlrpc_request *req)
  61 {
  62         struct oti_req_ack_lock *ack_lock;
  63         int i;
  64
  65         if (oti == NULL)
  66                 return;
  67
  68         if (req->rq_repmsg)
  69                 req->rq_repmsg->transno = oti->oti_transno;
  70
  71         /* XXX 4 == entries in oti_ack_locks??? */
  72         for (ack_lock = oti->oti_ack_locks, i = 0; i < 4; i++, ack_lock++) {
  73                 if (!ack_lock->mode)
  74                         break;
  75                 /* XXX not even calling target_send_reply in some cases... */
  76                 ptlrpc_save_lock (req, &ack_lock->lock, ack_lock->mode);
  77         }
  78 }
  79
  80 static int ost_destroy(struct obd_export *exp, struct ptlrpc_request *req,
  81                        struct obd_trans_info *oti)
  82 {
  83         struct ost_body *body, *repbody;
  84         int rc, size = sizeof(*body);
  85         ENTRY;
  86
  87         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
  88         if (body == NULL)
  89                 RETURN(-EFAULT);
  90
  91         rc = lustre_pack_reply(req, 1, &size, NULL);
  92         if (rc)
  93                 RETURN(rc);
  94
  95         if (body->oa.o_valid & OBD_MD_FLCOOKIE)
  96                 oti->oti_logcookies = obdo_logcookie(&body->oa);
  97         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
  98         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
  99         req->rq_status = obd_destroy(exp, &body->oa, NULL, oti);
 100         RETURN(0);
 101 }
 102
 103 static int ost_getattr(struct obd_export *exp, struct ptlrpc_request *req)
 104 {
 105         struct ost_body *body, *repbody;
 106         int rc, size = sizeof(*body);
 107         ENTRY;
 108
 109         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 110         if (body == NULL)
 111                 RETURN(-EFAULT);
 112
 113         rc = lustre_pack_reply(req, 1, &size, NULL);
 114         if (rc)
 115                 RETURN(rc);
 116
 117         repbody = lustre_msg_buf (req->rq_repmsg, 0, sizeof(*repbody));
 118         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 119         req->rq_status = obd_getattr(exp, &repbody->oa, NULL);
 120         RETURN(0);
 121 }
 122
 123 static int ost_statfs(struct ptlrpc_request *req)
 124 {
 125         struct obd_statfs *osfs;
 126         int rc, size = sizeof(*osfs);
 127         ENTRY;
 128
 129         rc = lustre_pack_reply(req, 1, &size, NULL);
 130         if (rc)
 131                 RETURN(rc);
 132
 133         osfs = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*osfs));
 134
 135         req->rq_status = obd_statfs(req->rq_export->exp_obd, osfs, jiffies-HZ);
 136         if (req->rq_status != 0)
 137                 CERROR("ost: statfs failed: rc %d\n", req->rq_status);
 138
 139         RETURN(0);
 140 }
 141
 142 static int ost_create(struct obd_export *exp, struct ptlrpc_request *req,
 143                       struct obd_trans_info *oti)
 144 {
 145         struct ost_body *body, *repbody;
 146         int rc, size = sizeof(*repbody);
 147         ENTRY;
 148
 149         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 150         if (body == NULL)
 151                 RETURN(-EFAULT);
 152
 153         rc = lustre_pack_reply(req, 1, &size, NULL);
 154         if (rc)
 155                 RETURN(rc);
 156
 157         repbody = lustre_msg_buf (req->rq_repmsg, 0, sizeof(*repbody));
 158         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 159         oti->oti_logcookies = obdo_logcookie(&repbody->oa);
 160         req->rq_status = obd_create(exp, &repbody->oa, NULL, oti);
 161         //obd_log_cancel(conn, NULL, 1, oti->oti_logcookies, 0);
 162         RETURN(0);
 163 }
 164
 165 static int ost_punch(struct obd_export *exp, struct ptlrpc_request *req,
 166                      struct obd_trans_info *oti)
 167 {
 168         struct ost_body *body, *repbody;
 169         int rc, size = sizeof(*repbody);
 170         ENTRY;
 171
 172         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 173         if (body == NULL)
 174                 RETURN(-EFAULT);
 175
 176         if ((body->oa.o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
 177             (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
 178                 RETURN(-EINVAL);
 179
 180         rc = lustre_pack_reply(req, 1, &size, NULL);
 181         if (rc)
 182                 RETURN(rc);
 183
 184         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 185         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 186         req->rq_status = obd_punch(exp, &repbody->oa, NULL, repbody->oa.o_size,
 187                                    repbody->oa.o_blocks, oti);
 188         RETURN(0);
 189 }
 190
 191 static int ost_sync(struct obd_export *exp, struct ptlrpc_request *req)
 192 {
 193         struct ost_body *body, *repbody;
 194         int rc, size = sizeof(*repbody);
 195         ENTRY;
 196
 197         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 198         if (body == NULL)
 199                 RETURN(-EFAULT);
 200
 201         rc = lustre_pack_reply(req, 1, &size, NULL);
 202         if (rc)
 203                 RETURN(rc);
 204
 205         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 206         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 207         req->rq_status = obd_sync(exp, &repbody->oa, NULL, repbody->oa.o_size,
 208                                   repbody->oa.o_blocks);
 209         RETURN(0);
 210 }
 211
 212 static int ost_setattr(struct obd_export *exp, struct ptlrpc_request *req,
 213                        struct obd_trans_info *oti)
 214 {
 215         struct ost_body *body, *repbody;
 216         int rc, size = sizeof(*repbody);
 217         ENTRY;
 218
 219         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 220         if (body == NULL)
 221                 RETURN(-EFAULT);
 222
 223         rc = lustre_pack_reply(req, 1, &size, NULL);
 224         if (rc)
 225                 RETURN(rc);
 226
 227         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 228         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 229
 230         req->rq_status = obd_setattr(exp, &repbody->oa, NULL, oti);
 231         RETURN(0);
 232 }
 233
 234 static int ost_bulk_timeout(void *data)
 235 {
 236         ENTRY;
 237         /* We don't fail the connection here, because having the export
 238          * killed makes the (vital) call to commitrw very sad.
 239          */
 240         RETURN(1);
 241 }
 242
 243 static int get_per_page_niobufs(struct obd_ioobj *ioo, int nioo,
 244                                 struct niobuf_remote *rnb, int nrnb,
 245                                 struct niobuf_remote **pp_rnbp)
 246 {
 247         /* Copy a remote niobuf, splitting it into page-sized chunks
 248          * and setting ioo[i].ioo_bufcnt accordingly */
 249         struct niobuf_remote *pp_rnb;
 250         int   i;
 251         int   j;
 252         int   page;
 253         int   rnbidx = 0;
 254         int   npages = 0;
 255
 256         /* first count and check the number of pages required */
 257         for (i = 0; i < nioo; i++)
 258                 for (j = 0; j < ioo->ioo_bufcnt; j++, rnbidx++) {
 259                         obd_off offset = rnb[rnbidx].offset;
 260                         obd_off p0 = offset >> PAGE_SHIFT;
 261                         obd_off pn = (offset + rnb[rnbidx].len - 1)>>PAGE_SHIFT;
 262
 263                         LASSERT(rnbidx < nrnb);
 264
 265                         npages += (pn + 1 - p0);
 266
 267                         if (rnb[rnbidx].len == 0) {
 268                                 CERROR("zero len BRW: obj %d objid "LPX64
 269                                        " buf %u\n", i, ioo[i].ioo_id, j);
 270                                 return -EINVAL;
 271                         }
 272                         if (j > 0 &&
 273                             rnb[rnbidx].offset <= rnb[rnbidx-1].offset) {
 274                                 CERROR("unordered BRW: obj %d objid "LPX64
 275                                        " buf %u offset "LPX64" <= "LPX64"\n",
 276                                        i, ioo[i].ioo_id, j, rnb[rnbidx].offset,
 277                                        rnb[rnbidx].offset);
 278                                 return -EINVAL;
 279                         }
 280                 }
 281
 282         LASSERT(rnbidx == nrnb);
 283
 284         if (npages == nrnb) {       /* all niobufs are for single pages */
 285                 *pp_rnbp = rnb;
 286                 return npages;
 287         }
 288
 289         OBD_ALLOC(pp_rnb, sizeof(*pp_rnb) * npages);
 290         if (pp_rnb == NULL)
 291                 return -ENOMEM;
 292
 293         /* now do the actual split */
 294         page = rnbidx = 0;
 295         for (i = 0; i < nioo; i++) {
 296                 int  obj_pages = 0;
 297
 298                 for (j = 0; j < ioo[i].ioo_bufcnt; j++, rnbidx++) {
 299                         obd_off off = rnb[rnbidx].offset;
 300                         int     nob = rnb[rnbidx].len;
 301
 302                         LASSERT(rnbidx < nrnb);
 303                         do {
 304                                 obd_off  poff = off & (PAGE_SIZE - 1);
 305                                 int      pnob = (poff + nob > PAGE_SIZE) ?
 306                                                 PAGE_SIZE - poff : nob;
 307
 308                                 LASSERT(page < npages);
 309                                 pp_rnb[page].len = pnob;
 310                                 pp_rnb[page].offset = off;
 311                                 pp_rnb[page].flags = rnb[rnbidx].flags;
 312
 313                                 CDEBUG(0, "   obj %d id "LPX64
 314                                        "page %d(%d) "LPX64" for %d, flg %x\n",
 315                                        i, ioo[i].ioo_id, obj_pages, page,
 316                                        pp_rnb[page].offset, pp_rnb[page].len,
 317                                        pp_rnb[page].flags);
 318                                 page++;
 319                                 obj_pages++;
 320
 321                                 off += pnob;
 322                                 nob -= pnob;
 323                         } while (nob > 0);
 324                         LASSERT(nob == 0);
 325                 }
 326                 ioo[i].ioo_bufcnt = obj_pages;
 327         }
 328         LASSERT(page == npages);
 329
 330         *pp_rnbp = pp_rnb;
 331         return npages;
 332 }
 333
 334 static void free_per_page_niobufs (int npages, struct niobuf_remote *pp_rnb,
 335                                    struct niobuf_remote *rnb)
 336 {
 337         if (pp_rnb == rnb)                      /* didn't allocate above */
 338                 return;
 339
 340         OBD_FREE(pp_rnb, sizeof(*pp_rnb) * npages);
 341 }
 342
 343 #if CHECKSUM_BULK
 344 obd_count ost_checksum_bulk(struct ptlrpc_bulk_desc *desc)
 345 {
 346         obd_count cksum = 0;
 347         int i;
 348
 349         for (i = 0; i < desc->bd_iov_count; i++) {
 350                 struct page *page = desc->bd_iov[i].kiov_page;
 351                 char *ptr = kmap(page);
 352                 int psum, off = desc->bd_iov[i].kiov_offset & ~PAGE_MASK;
 353                 int count = desc->bd_iov[i].kiov_len;
 354
 355                 while (count > 0) {
 356                         ost_checksum(&cksum, &psum, ptr + off,
 357                                      count > CHECKSUM_CHUNK ?
 358                                      CHECKSUM_CHUNK : count);
 359                         LL_CDEBUG_PAGE(D_PAGE, page, "off %d checksum %x\n",
 360                                        off, psum);
 361                         off += CHECKSUM_CHUNK;
 362                         count -= CHECKSUM_CHUNK;
 363                 }
 364                 kunmap(page);
 365         }
 366
 367         return cksum;
 368 }
 369 #endif
 370
 371 static int ost_brw_read(struct ptlrpc_request *req, struct obd_trans_info *oti)
 372 {
 373         struct ptlrpc_bulk_desc *desc;
 374         struct niobuf_remote    *remote_nb;
 375         struct niobuf_remote    *pp_rnb;
 376         struct niobuf_local     *local_nb;
 377         struct obd_ioobj        *ioo;
 378         struct ost_body         *body, *repbody;
 379         struct l_wait_info       lwi;
 380         int                      size[1] = { sizeof(*body) };
 381         int                      comms_error = 0;
 382         int                      niocount;
 383         int                      npages;
 384         int                      nob = 0;
 385         int                      rc;
 386         int                      i;
 387         ENTRY;
 388
 389         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
 390                 GOTO(out, rc = -EIO);
 391
 392         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 393                          (obd_timeout + 1) / 4);
 394
 395         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 396         if (body == NULL) {
 397                 CERROR("Missing/short ost_body\n");
 398                 GOTO(out, rc = -EFAULT);
 399         }
 400
 401         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 402         if (ioo == NULL) {
 403                 CERROR("Missing/short ioobj\n");
 404                 GOTO(out, rc = -EFAULT);
 405         }
 406
 407         niocount = ioo->ioo_bufcnt;
 408         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 409                                        lustre_swab_niobuf_remote);
 410         if (remote_nb == NULL) {
 411                 CERROR("Missing/short niobuf\n");
 412                 GOTO(out, rc = -EFAULT);
 413         }
 414         if (lustre_msg_swabbed(req->rq_reqmsg)) { /* swab remaining niobufs */
 415                 for (i = 1; i < niocount; i++)
 416                         lustre_swab_niobuf_remote (&remote_nb[i]);
 417         }
 418
 419         rc = lustre_pack_reply(req, 1, size, NULL);
 420         if (rc)
 421                 GOTO(out, rc);
 422
 423         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 424         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 425         npages = get_per_page_niobufs(ioo, 1, remote_nb, niocount, &pp_rnb);
 426         if (npages < 0)
 427                 GOTO(out, rc = npages);
 428
 429         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 430         if (local_nb == NULL)
 431                 GOTO(out_pp_rnb, rc = -ENOMEM);
 432
 433         desc = ptlrpc_prep_bulk_exp (req, npages,
 434                                      BULK_PUT_SOURCE, OST_BULK_PORTAL);
 435         if (desc == NULL)
 436                 GOTO(out_local, rc = -ENOMEM);
 437
 438         rc = obd_preprw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 439                         ioo, npages, pp_rnb, local_nb, oti);
 440         if (rc != 0)
 441                 GOTO(out_bulk, rc);
 442
 443         /* We're finishing using body->oa as an input variable */
 444         body->oa.o_valid = 0;
 445
 446         nob = 0;
 447         for (i = 0; i < npages; i++) {
 448                 int page_rc = local_nb[i].rc;
 449
 450                 if (page_rc < 0) {              /* error */
 451                         rc = page_rc;
 452                         break;
 453                 }
 454
 455                 LASSERT(page_rc <= pp_rnb[i].len);
 456                 nob += page_rc;
 457                 if (page_rc != 0) {             /* some data! */
 458                         LASSERT (local_nb[i].page != NULL);
 459                         ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 460                                               pp_rnb[i].offset & (PAGE_SIZE-1),
 461                                               page_rc);
 462                 }
 463
 464                 if (page_rc != pp_rnb[i].len) { /* short read */
 465                         /* All subsequent pages should be 0 */
 466                         while(++i < npages)
 467                                 LASSERT(local_nb[i].rc == 0);
 468                         break;
 469                 }
 470         }
 471
 472         if (rc == 0) {
 473                 rc = ptlrpc_start_bulk_transfer(desc);
 474                 if (rc == 0) {
 475                         lwi = LWI_TIMEOUT(obd_timeout * HZ / 4,
 476                                           ost_bulk_timeout, desc);
 477                         rc = l_wait_event(desc->bd_waitq,
 478                                           !ptlrpc_bulk_active(desc), &lwi);
 479                         LASSERT(rc == 0 || rc == -ETIMEDOUT);
 480                         if (rc == -ETIMEDOUT) {
 481                                 DEBUG_REQ(D_ERROR, req, "timeout on bulk PUT");
 482                                 ptlrpc_abort_bulk(desc);
 483                         } else if (!desc->bd_success ||
 484                                    desc->bd_nob_transferred != desc->bd_nob) {
 485                                 DEBUG_REQ(D_ERROR, req, "%s bulk PUT %d(%d)",
 486                                           desc->bd_success ?
 487                                           "truncated" : "network error on",
 488                                           desc->bd_nob_transferred,
 489                                           desc->bd_nob);
 490                                 /* XXX should this be a different errno? */
 491                                 rc = -ETIMEDOUT;
 492                         }
 493                 } else {
 494                         DEBUG_REQ(D_ERROR, req, "bulk PUT failed: rc %d\n", rc);
 495                 }
 496                 comms_error = rc != 0;
 497         }
 498
 499         /* Must commit after prep above in all cases */
 500         rc = obd_commitrw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 501                           ioo, npages, local_nb, oti, rc);
 502
 503         if (rc == 0) {
 504                 repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 505                 memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 506
 507 #if CHECKSUM_BULK
 508                 repbody->oa.o_cksum = ost_checksum_bulk(desc);
 509                 repbody->oa.o_valid |= OBD_MD_FLCKSUM;
 510 #endif
 511         }
 512
 513  out_bulk:
 514         ptlrpc_free_bulk(desc);
 515  out_local:
 516         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 517  out_pp_rnb:
 518         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 519  out:
 520         LASSERT(rc <= 0);
 521         if (rc == 0) {
 522                 req->rq_status = nob;
 523                 target_committed_to_req(req);
 524                 ptlrpc_reply(req);
 525         } else if (!comms_error) {
 526                 /* only reply if comms OK */
 527                 target_committed_to_req(req);
 528                 req->rq_status = rc;
 529                 ptlrpc_error(req);
 530         } else {
 531                 if (req->rq_reply_state != NULL) {
 532                         /* reply out callback would free */
 533                         ptlrpc_rs_decref(req->rq_reply_state);
 534                         req->rq_reply_state = NULL;
 535                 }
 536                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 537                         CERROR("bulk IO comms error: "
 538                                "evicting %s@%s id %s\n",
 539                                req->rq_export->exp_client_uuid.uuid,
 540                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 541                                req->rq_peerstr);
 542                         ptlrpc_fail_export(req->rq_export);
 543                 } else {
 544                         CERROR("ignoring bulk IO comms error: "
 545                                "client reconnected %s@%s id %s\n",
 546                                req->rq_export->exp_client_uuid.uuid,
 547                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 548                                req->rq_peerstr);
 549                 }
 550         }
 551
 552         RETURN(rc);
 553 }
 554
 555 static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
 556 {
 557         struct ptlrpc_bulk_desc *desc;
 558         struct niobuf_remote    *remote_nb;
 559         struct niobuf_remote    *pp_rnb;
 560         struct niobuf_local     *local_nb;
 561         struct obd_ioobj        *ioo;
 562         struct ost_body         *body, *repbody;
 563         struct l_wait_info       lwi;
 564         __u32                   *rcs;
 565         int                      size[2] = { sizeof(*body) };
 566         int                      objcount, niocount, npages;
 567         int                      comms_error = 0;
 568         int                      rc, swab, i, j;
 569         ENTRY;
 570
 571         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
 572                 GOTO(out, rc = -EIO);
 573
 574         /* pause before transaction has been started */
 575         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 576                          (obd_timeout + 1) / 4);
 577
 578         swab = lustre_msg_swabbed(req->rq_reqmsg);
 579         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 580         if (body == NULL) {
 581                 CERROR("Missing/short ost_body\n");
 582                 GOTO(out, rc = -EFAULT);
 583         }
 584
 585         LASSERT_REQSWAB(req, 1);
 586         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 587         if (objcount == 0) {
 588                 CERROR("Missing/short ioobj\n");
 589                 GOTO(out, rc = -EFAULT);
 590         }
 591         ioo = lustre_msg_buf (req->rq_reqmsg, 1, objcount * sizeof(*ioo));
 592         LASSERT (ioo != NULL);
 593         for (niocount = i = 0; i < objcount; i++) {
 594                 if (swab)
 595                         lustre_swab_obd_ioobj (&ioo[i]);
 596                 if (ioo[i].ioo_bufcnt == 0) {
 597                         CERROR("ioo[%d] has zero bufcnt\n", i);
 598                         GOTO(out, rc = -EFAULT);
 599                 }
 600                 niocount += ioo[i].ioo_bufcnt;
 601         }
 602
 603         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 604                                        lustre_swab_niobuf_remote);
 605         if (remote_nb == NULL) {
 606                 CERROR("Missing/short niobuf\n");
 607                 GOTO(out, rc = -EFAULT);
 608         }
 609         if (swab) {                             /* swab the remaining niobufs */
 610                 for (i = 1; i < niocount; i++)
 611                         lustre_swab_niobuf_remote (&remote_nb[i]);
 612         }
 613
 614         size[1] = niocount * sizeof(*rcs);
 615         rc = lustre_pack_reply(req, 2, size, NULL);
 616         if (rc != 0)
 617                 GOTO(out, rc);
 618         rcs = lustre_msg_buf(req->rq_repmsg, 1, niocount * sizeof(*rcs));
 619
 620         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 621         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 622         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 623         if (npages < 0)
 624                 GOTO(out, rc = npages);
 625
 626         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 627         if (local_nb == NULL)
 628                 GOTO(out_pp_rnb, rc = -ENOMEM);
 629
 630         desc = ptlrpc_prep_bulk_exp (req, npages,
 631                                      BULK_GET_SINK, OST_BULK_PORTAL);
 632         if (desc == NULL)
 633                 GOTO(out_local, rc = -ENOMEM);
 634
 635         rc = obd_preprw(OBD_BRW_WRITE, req->rq_export, &body->oa, objcount,
 636                         ioo, npages, pp_rnb, local_nb, oti);
 637         if (rc != 0)
 638                 GOTO(out_bulk, rc);
 639
 640         /* NB Having prepped, we must commit... */
 641
 642         for (i = 0; i < npages; i++)
 643                 ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 644                                       pp_rnb[i].offset & (PAGE_SIZE - 1),
 645                                       pp_rnb[i].len);
 646
 647         rc = ptlrpc_start_bulk_transfer (desc);
 648         if (rc == 0) {
 649                 lwi = LWI_TIMEOUT(obd_timeout * HZ / 4,
 650                                   ost_bulk_timeout, desc);
 651                 rc = l_wait_event(desc->bd_waitq, !ptlrpc_bulk_active(desc),
 652                                   &lwi);
 653                 LASSERT(rc == 0 || rc == -ETIMEDOUT);
 654                 if (rc == -ETIMEDOUT) {
 655                         DEBUG_REQ(D_ERROR, req, "timeout on bulk GET");
 656                         ptlrpc_abort_bulk(desc);
 657                 } else if (!desc->bd_success ||
 658                            desc->bd_nob_transferred != desc->bd_nob) {
 659                         DEBUG_REQ(D_ERROR, req, "%s bulk GET %d(%d)",
 660                                   desc->bd_success ?
 661                                   "truncated" : "network error on",
 662                                   desc->bd_nob_transferred, desc->bd_nob);
 663                         /* XXX should this be a different errno? */
 664                         rc = -ETIMEDOUT;
 665                 }
 666         } else {
 667                 DEBUG_REQ(D_ERROR, req, "ptlrpc_bulk_get failed: rc %d\n", rc);
 668         }
 669         comms_error = rc != 0;
 670
 671         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 672         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 673
 674 #if CHECKSUM_BULK
 675         if (rc == 0 && (body->oa.o_valid & OBD_MD_FLCKSUM) != 0) {
 676                 static int cksum_counter;
 677                 obd_count client_cksum = body->oa.o_cksum;
 678                 obd_count cksum = ost_checksum_bulk(desc);
 679
 680                 if (client_cksum != cksum) {
 681                         CERROR("Bad checksum: client %x, server %x id %s\n",
 682                                client_cksum, cksum,
 683                                req->rq_peerstr);
 684                         cksum_counter = 1;
 685                         repbody->oa.o_cksum = cksum;
 686                 } else {
 687                         cksum_counter++;
 688                         if ((cksum_counter & (-cksum_counter)) == cksum_counter)
 689                                 CWARN("Checksum %u from %s: %x OK\n",
 690                                       cksum_counter,
 691                                       req->rq_peerstr,
 692                                       cksum);
 693                 }
 694         }
 695 #endif
 696         /* Must commit after prep above in all cases */
 697         rc = obd_commitrw(OBD_BRW_WRITE, req->rq_export, &repbody->oa,
 698                            objcount, ioo, npages, local_nb, oti, rc);
 699
 700         if (rc == 0) {
 701                 /* set per-requested niobuf return codes */
 702                 for (i = j = 0; i < niocount; i++) {
 703                         int nob = remote_nb[i].len;
 704
 705                         rcs[i] = 0;
 706                         do {
 707                                 LASSERT(j < npages);
 708                                 if (local_nb[j].rc < 0)
 709                                         rcs[i] = local_nb[j].rc;
 710                                 nob -= pp_rnb[j].len;
 711                                 j++;
 712                         } while (nob > 0);
 713                         LASSERT(nob == 0);
 714                 }
 715                 LASSERT(j == npages);
 716         }
 717
 718  out_bulk:
 719         ptlrpc_free_bulk(desc);
 720  out_local:
 721         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 722  out_pp_rnb:
 723         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 724  out:
 725         if (rc == 0) {
 726                 oti_to_request(oti, req);
 727                 target_committed_to_req(req);
 728                 rc = ptlrpc_reply(req);
 729         } else if (!comms_error) {
 730                 /* Only reply if there was no comms problem with bulk */
 731                 target_committed_to_req(req);
 732                 req->rq_status = rc;
 733                 ptlrpc_error(req);
 734         } else {
 735                 if (req->rq_reply_state != NULL) {
 736                         /* reply out callback would free */
 737                         ptlrpc_rs_decref(req->rq_reply_state);
 738                         req->rq_reply_state = NULL;
 739                 }
 740                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 741                         CERROR("%s: bulk IO comm error evicting %s@%s id %s\n",
 742                                req->rq_export->exp_obd->obd_name,
 743                                req->rq_export->exp_client_uuid.uuid,
 744                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 745                                req->rq_peerstr);
 746                         ptlrpc_fail_export(req->rq_export);
 747                 } else {
 748                         CERROR("ignoring bulk IO comms error: "
 749                                "client reconnected %s@%s id %s\n",
 750                                req->rq_export->exp_client_uuid.uuid,
 751                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 752                                req->rq_peerstr);
 753                 }
 754         }
 755         RETURN(rc);
 756 }
 757
 758 static int ost_san_brw(struct ptlrpc_request *req, int cmd)
 759 {
 760         struct niobuf_remote *remote_nb, *res_nb, *pp_rnb;
 761         struct obd_ioobj *ioo;
 762         struct ost_body *body, *repbody;
 763         int rc, i, objcount, niocount, size[2] = {sizeof(*body)}, npages;
 764         int swab;
 765         ENTRY;
 766
 767         /* XXX not set to use latest protocol */
 768
 769         swab = lustre_msg_swabbed(req->rq_reqmsg);
 770         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 771         if (body == NULL) {
 772                 CERROR("Missing/short ost_body\n");
 773                 GOTO(out, rc = -EFAULT);
 774         }
 775
 776         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 777         if (ioo == NULL) {
 778                 CERROR("Missing/short ioobj\n");
 779                 GOTO(out, rc = -EFAULT);
 780         }
 781         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 782         niocount = ioo[0].ioo_bufcnt;
 783         for (i = 1; i < objcount; i++) {
 784                 if (swab)
 785                         lustre_swab_obd_ioobj (&ioo[i]);
 786                 niocount += ioo[i].ioo_bufcnt;
 787         }
 788
 789         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 790                                        lustre_swab_niobuf_remote);
 791         if (remote_nb == NULL) {
 792                 CERROR("Missing/short niobuf\n");
 793                 GOTO(out, rc = -EFAULT);
 794         }
 795         if (swab) {                             /* swab the remaining niobufs */
 796                 for (i = 1; i < niocount; i++)
 797                         lustre_swab_niobuf_remote (&remote_nb[i]);
 798         }
 799
 800         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 801         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 802         if (npages < 0)
 803                 GOTO (out, rc = npages);
 804
 805         size[1] = npages * sizeof(*pp_rnb);
 806         rc = lustre_pack_reply(req, 2, size, NULL);
 807         if (rc)
 808                 GOTO(out_pp_rnb, rc);
 809
 810         req->rq_status = obd_san_preprw(cmd, req->rq_export, &body->oa,
 811                                         objcount, ioo, npages, pp_rnb);
 812
 813         if (req->rq_status)
 814                 GOTO(out_pp_rnb, rc = 0);
 815
 816         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 817         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 818
 819         res_nb = lustre_msg_buf(req->rq_repmsg, 1, size[1]);
 820         memcpy(res_nb, remote_nb, size[1]);
 821         rc = 0;
 822 out_pp_rnb:
 823         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 824 out:
 825         target_committed_to_req(req);
 826         if (rc) {
 827                 req->rq_status = rc;
 828                 ptlrpc_error(req);
 829         } else {
 830                 ptlrpc_reply(req);
 831         }
 832
 833         return rc;
 834 }
 835
 836
 837 static int ost_set_info(struct obd_export *exp, struct ptlrpc_request *req)
 838 {
 839         char *key;
 840         int keylen, rc = 0;
 841         ENTRY;
 842
 843         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 844         if (key == NULL) {
 845                 DEBUG_REQ(D_HA, req, "no set_info key");
 846                 RETURN(-EFAULT);
 847         }
 848         keylen = req->rq_reqmsg->buflens[0];
 849
 850         rc = lustre_pack_reply(req, 0, NULL, NULL);
 851         if (rc)
 852                 RETURN(rc);
 853
 854         rc = obd_set_info(exp, keylen, key, 0, NULL);
 855         req->rq_repmsg->status = 0;
 856         RETURN(rc);
 857 }
 858
 859 static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
 860 {
 861         char *key;
 862         int keylen, rc = 0, size = sizeof(obd_id);
 863         obd_id *reply;
 864         ENTRY;
 865
 866         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 867         if (key == NULL) {
 868                 DEBUG_REQ(D_HA, req, "no get_info key");
 869                 RETURN(-EFAULT);
 870         }
 871         keylen = req->rq_reqmsg->buflens[0];
 872
 873         if (keylen < strlen("last_id") || memcmp(key, "last_id", 7) != 0)
 874                 RETURN(-EPROTO);
 875
 876         rc = lustre_pack_reply(req, 1, &size, NULL);
 877         if (rc)
 878                 RETURN(rc);
 879
 880         reply = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply));
 881         rc = obd_get_info(exp, keylen, key, &size, reply);
 882         req->rq_repmsg->status = 0;
 883         RETURN(rc);
 884 }
 885
 886 static int ost_filter_recovery_request(struct ptlrpc_request *req,
 887                                        struct obd_device *obd, int *process)
 888 {
 889         switch (req->rq_reqmsg->opc) {
 890         case OST_CONNECT: /* This will never get here, but for completeness. */
 891         case OST_DISCONNECT:
 892                *process = 1;
 893                RETURN(0);
 894
 895         case OBD_PING:
 896         case OST_CREATE:
 897         case OST_DESTROY:
 898         case OST_PUNCH:
 899         case OST_SETATTR:
 900         case OST_SYNC:
 901         case OST_WRITE:
 902         case OBD_LOG_CANCEL:
 903         case LDLM_ENQUEUE:
 904                 *process = target_queue_recovery_request(req, obd);
 905                 RETURN(0);
 906
 907         default:
 908                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
 909                 *process = 0;
 910                 /* XXX what should we set rq_status to here? */
 911                 req->rq_status = -EAGAIN;
 912                 RETURN(ptlrpc_error(req));
 913         }
 914 }
 915
 916 static int ost_handle(struct ptlrpc_request *req)
 917 {
 918         struct obd_trans_info trans_info = { 0, };
 919         struct obd_trans_info *oti = &trans_info;
 920         int should_process, fail = OBD_FAIL_OST_ALL_REPLY_NET, rc = 0;
 921         struct obd_device *obd = NULL;
 922         ENTRY;
 923
 924         LASSERT(current->journal_info == NULL);
 925         /* XXX identical to MDS */
 926         if (req->rq_reqmsg->opc != OST_CONNECT) {
 927                 int abort_recovery, recovering;
 928
 929                 if (req->rq_export == NULL) {
 930                         CDEBUG(D_HA,"operation %d on unconnected OST from %s\n",
 931                                req->rq_reqmsg->opc, req->rq_peerstr);
 932                         req->rq_status = -ENOTCONN;
 933                         GOTO(out, rc = -ENOTCONN);
 934                 }
 935
 936                 obd = req->rq_export->exp_obd;
 937
 938                 /* Check for aborted recovery. */
 939                 spin_lock_bh(&obd->obd_processing_task_lock);
 940                 abort_recovery = obd->obd_abort_recovery;
 941                 recovering = obd->obd_recovering;
 942                 spin_unlock_bh(&obd->obd_processing_task_lock);
 943                 if (abort_recovery) {
 944                         target_abort_recovery(obd);
 945                 } else if (recovering) {
 946                         rc = ost_filter_recovery_request(req, obd,
 947                                                          &should_process);
 948                         if (rc || !should_process)
 949                                 RETURN(rc);
 950                 }
 951         }
 952
 953         oti_init(oti, req);
 954
 955         switch (req->rq_reqmsg->opc) {
 956         case OST_CONNECT: {
 957                 CDEBUG(D_INODE, "connect\n");
 958                 OBD_FAIL_RETURN(OBD_FAIL_OST_CONNECT_NET, 0);
 959                 rc = target_handle_connect(req, ost_handle);
 960                 if (!rc)
 961                         obd = req->rq_export->exp_obd;
 962                 break;
 963         }
 964         case OST_DISCONNECT:
 965                 CDEBUG(D_INODE, "disconnect\n");
 966                 OBD_FAIL_RETURN(OBD_FAIL_OST_DISCONNECT_NET, 0);
 967                 rc = target_handle_disconnect(req);
 968                 break;
 969         case OST_CREATE:
 970                 CDEBUG(D_INODE, "create\n");
 971                 OBD_FAIL_RETURN(OBD_FAIL_OST_CREATE_NET, 0);
 972                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_OST_ENOSPC))
 973                         GOTO(out, rc = -ENOSPC);
 974                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_OST_EROFS))
 975                         GOTO(out, rc = -EROFS);
 976                 rc = ost_create(req->rq_export, req, oti);
 977                 break;
 978         case OST_DESTROY:
 979                 CDEBUG(D_INODE, "destroy\n");
 980                 OBD_FAIL_RETURN(OBD_FAIL_OST_DESTROY_NET, 0);
 981                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_OST_EROFS))
 982                         GOTO(out, rc = -EROFS);
 983                 rc = ost_destroy(req->rq_export, req, oti);
 984                 break;
 985         case OST_GETATTR:
 986                 CDEBUG(D_INODE, "getattr\n");
 987                 OBD_FAIL_RETURN(OBD_FAIL_OST_GETATTR_NET, 0);
 988                 rc = ost_getattr(req->rq_export, req);
 989                 break;
 990         case OST_SETATTR:
 991                 CDEBUG(D_INODE, "setattr\n");
 992                 OBD_FAIL_RETURN(OBD_FAIL_OST_SETATTR_NET, 0);
 993                 rc = ost_setattr(req->rq_export, req, oti);
 994                 break;
 995         case OST_WRITE:
 996                 CDEBUG(D_INODE, "write\n");
 997                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 998                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_OST_ENOSPC))
 999                         GOTO(out, rc = -ENOSPC);
1000                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_OST_EROFS))
1001                         GOTO(out, rc = -EROFS);
1002                 rc = ost_brw_write(req, oti);
1003                 LASSERT(current->journal_info == NULL);
1004                 /* ost_brw_write sends its own replies */
1005                 RETURN(rc);
1006         case OST_READ:
1007                 CDEBUG(D_INODE, "read\n");
1008                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1009                 rc = ost_brw_read(req, oti);
1010                 LASSERT(current->journal_info == NULL);
1011                 /* ost_brw_read sends its own replies */
1012                 RETURN(rc);
1013         case OST_SAN_READ:
1014                 CDEBUG(D_INODE, "san read\n");
1015                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1016                 rc = ost_san_brw(req, OBD_BRW_READ);
1017                 /* ost_san_brw sends its own replies */
1018                 RETURN(rc);
1019         case OST_SAN_WRITE:
1020                 CDEBUG(D_INODE, "san write\n");
1021                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1022                 rc = ost_san_brw(req, OBD_BRW_WRITE);
1023                 /* ost_san_brw sends its own replies */
1024                 RETURN(rc);
1025         case OST_PUNCH:
1026                 CDEBUG(D_INODE, "punch\n");
1027                 OBD_FAIL_RETURN(OBD_FAIL_OST_PUNCH_NET, 0);
1028                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_OST_EROFS))
1029                         GOTO(out, rc = -EROFS);
1030                 rc = ost_punch(req->rq_export, req, oti);
1031                 break;
1032         case OST_STATFS:
1033                 CDEBUG(D_INODE, "statfs\n");
1034                 OBD_FAIL_RETURN(OBD_FAIL_OST_STATFS_NET, 0);
1035                 rc = ost_statfs(req);
1036                 break;
1037         case OST_SYNC:
1038                 CDEBUG(D_INODE, "sync\n");
1039                 OBD_FAIL_RETURN(OBD_FAIL_OST_SYNC_NET, 0);
1040                 rc = ost_sync(req->rq_export, req);
1041                 break;
1042         case OST_SET_INFO:
1043                 DEBUG_REQ(D_INODE, req, "set_info");
1044                 rc = ost_set_info(req->rq_export, req);
1045                 break;
1046         case OST_GET_INFO:
1047                 DEBUG_REQ(D_INODE, req, "get_info");
1048                 rc = ost_get_info(req->rq_export, req);
1049                 break;
1050         case OBD_PING:
1051                 DEBUG_REQ(D_INODE, req, "ping");
1052                 rc = target_handle_ping(req);
1053                 break;
1054         /* FIXME - just reply status */
1055         case LLOG_ORIGIN_CONNECT:
1056                 DEBUG_REQ(D_INODE, req, "log connect\n");
1057                 rc = llog_handle_connect(req);
1058                 req->rq_status = rc;
1059                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1060                 if (rc)
1061                         RETURN(rc);
1062                 RETURN(ptlrpc_reply(req));
1063         case OBD_LOG_CANCEL:
1064                 CDEBUG(D_INODE, "log cancel\n");
1065                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOG_CANCEL_NET, 0);
1066                 rc = llog_origin_handle_cancel(req);
1067                 req->rq_status = rc;
1068                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1069                 if (rc)
1070                         RETURN(rc);
1071                 RETURN(ptlrpc_reply(req));
1072         case LDLM_ENQUEUE:
1073                 CDEBUG(D_INODE, "enqueue\n");
1074                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
1075                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1076                                          ldlm_server_blocking_ast,
1077                                          ldlm_server_glimpse_ast);
1078                 fail = OBD_FAIL_OST_LDLM_REPLY_NET;
1079                 break;
1080         case LDLM_CONVERT:
1081                 CDEBUG(D_INODE, "convert\n");
1082                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
1083                 rc = ldlm_handle_convert(req);
1084                 break;
1085         case LDLM_CANCEL:
1086                 CDEBUG(D_INODE, "cancel\n");
1087                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CANCEL, 0);
1088                 rc = ldlm_handle_cancel(req);
1089                 break;
1090         case LDLM_BL_CALLBACK:
1091         case LDLM_CP_CALLBACK:
1092                 CDEBUG(D_INODE, "callback\n");
1093                 CERROR("callbacks should not happen on OST\n");
1094                 /* fall through */
1095         default:
1096                 CERROR("Unexpected opcode %d\n", req->rq_reqmsg->opc);
1097                 req->rq_status = -ENOTSUPP;
1098                 rc = ptlrpc_error(req);
1099                 RETURN(rc);
1100         }
1101
1102         LASSERT(current->journal_info == NULL);
1103
1104         EXIT;
1105         /* If we're DISCONNECTing, the export_data is already freed */
1106         if (!rc && req->rq_reqmsg->opc != OST_DISCONNECT)
1107                 target_committed_to_req(req);
1108
1109 out:
1110         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LAST_REPLAY) {
1111                 if (obd && obd->obd_recovering) {
1112                         DEBUG_REQ(D_HA, req, "LAST_REPLAY, queuing reply");
1113                         return target_queue_final_reply(req, rc);
1114                 }
1115                 /* Lost a race with recovery; let the error path DTRT. */
1116                 rc = req->rq_status = -ENOTCONN;
1117         }
1118
1119         if (!rc)
1120                 oti_to_request(oti, req);
1121
1122         target_send_reply(req, rc, fail);
1123         return 0;
1124 }
1125
1126 static int ost_setup(struct obd_device *obd, obd_count len, void *buf)
1127 {
1128         struct ost_obd *ost = &obd->u.ost;
1129         struct lprocfs_static_vars lvars;
1130         int rc;
1131         ENTRY;
1132
1133         rc = cleanup_group_info();
1134         if (rc)
1135                 RETURN(rc);
1136
1137         rc = llog_start_commit_thread();
1138         if (rc < 0)
1139                 RETURN(rc);
1140
1141         lprocfs_init_vars(ost, &lvars);
1142         lprocfs_obd_setup(obd, lvars.obd_vars);
1143
1144         ost->ost_service =
1145                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
1146                                 OST_REQUEST_PORTAL, OSC_REPLY_PORTAL,
1147                                 obd_timeout * 1000, ost_handle, "ost",
1148                                 obd->obd_proc_entry, ost_print_req);
1149         if (ost->ost_service == NULL) {
1150                 CERROR("failed to start service\n");
1151                 GOTO(out_lprocfs, rc = -ENOMEM);
1152         }
1153
1154         rc = ptlrpc_start_n_threads(obd, ost->ost_service, OST_NUM_THREADS,
1155                                     "ll_ost");
1156         if (rc)
1157                 GOTO(out_service, rc = -EINVAL);
1158
1159         ost->ost_create_service =
1160                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
1161                                 OST_CREATE_PORTAL, OSC_REPLY_PORTAL,
1162                                 obd_timeout * 1000, ost_handle, "ost_create",
1163                                 obd->obd_proc_entry, ost_print_req);
1164         if (ost->ost_create_service == NULL) {
1165                 CERROR("failed to start OST create service\n");
1166                 GOTO(out_service, rc = -ENOMEM);
1167         }
1168
1169         rc = ptlrpc_start_n_threads(obd, ost->ost_create_service, 1,
1170                                     "ll_ost_creat");
1171         if (rc)
1172                 GOTO(out_create, rc = -EINVAL);
1173
1174         RETURN(0);
1175
1176 out_create:
1177         ptlrpc_unregister_service(ost->ost_create_service);
1178 out_service:
1179         ptlrpc_unregister_service(ost->ost_service);
1180 out_lprocfs:
1181         lprocfs_obd_cleanup(obd);
1182         RETURN(rc);
1183 }
1184
1185 static int ost_cleanup(struct obd_device *obd)
1186 {
1187         struct ost_obd *ost = &obd->u.ost;
1188         int err = 0;
1189         ENTRY;
1190
1191         spin_lock_bh(&obd->obd_processing_task_lock);
1192         if (obd->obd_recovering) {
1193                 target_cancel_recovery_timer(obd);
1194                 obd->obd_recovering = 0;
1195         }
1196         spin_unlock_bh(&obd->obd_processing_task_lock);
1197
1198         ptlrpc_unregister_service(ost->ost_service);
1199         ptlrpc_unregister_service(ost->ost_create_service);
1200
1201         lprocfs_obd_cleanup(obd);
1202
1203         RETURN(err);
1204 }
1205
1206 /* use obd ops to offer management infrastructure */
1207 static struct obd_ops ost_obd_ops = {
1208         .o_owner        = THIS_MODULE,
1209         .o_setup        = ost_setup,
1210         .o_cleanup      = ost_cleanup,
1211 };
1212
1213 static int __init ost_init(void)
1214 {
1215         struct lprocfs_static_vars lvars;
1216         ENTRY;
1217
1218         lprocfs_init_vars(ost,&lvars);
1219         RETURN(class_register_type(&ost_obd_ops, lvars.module_vars,
1220                                    LUSTRE_OST_NAME));
1221 }
1222
1223 static void /*__exit*/ ost_exit(void)
1224 {
1225         class_unregister_type(LUSTRE_OST_NAME);
1226 }
1227
1228 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1229 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
1230 MODULE_LICENSE("GPL");
1231
1232 module_init(ost_init);
1233 module_exit(ost_exit);