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/init.h>
  44 #include <linux/lprocfs_status.h>
  45 #include <linux/lustre_commit_confd.h>
  46 #include <portals/list.h>
  47
  48 void oti_init(struct obd_trans_info *oti, struct ptlrpc_request *req)
  49 {
  50         if (oti == NULL)
  51                 return;
  52         memset(oti, 0, sizeof *oti);
  53
  54         if (req->rq_repmsg && req->rq_reqmsg != 0)
  55                 oti->oti_transno = req->rq_repmsg->transno;
  56 }
  57
  58 void oti_to_request(struct obd_trans_info *oti, struct ptlrpc_request *req)
  59 {
  60         struct oti_req_ack_lock *ack_lock;
  61         int i;
  62
  63         if (oti == NULL)
  64                 return;
  65
  66         if (req->rq_repmsg)
  67                 req->rq_repmsg->transno = oti->oti_transno;
  68
  69         /* XXX 4 == entries in oti_ack_locks??? */
  70         for (ack_lock = oti->oti_ack_locks, i = 0; i < 4; i++, ack_lock++) {
  71                 if (!ack_lock->mode)
  72                         break;
  73                 ldlm_put_lock_into_req(req, &ack_lock->lock, ack_lock->mode);
  74         }
  75 }
  76
  77 static int ost_destroy(struct obd_export *exp, struct ptlrpc_request *req,
  78                        struct obd_trans_info *oti)
  79 {
  80         struct ost_body *body, *repbody;
  81         int rc, size = sizeof(*body);
  82         ENTRY;
  83
  84         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
  85         if (body == NULL)
  86                 RETURN(-EFAULT);
  87
  88         rc = lustre_pack_reply(req, 1, &size, NULL);
  89         if (rc)
  90                 RETURN(rc);
  91
  92         if (body->oa.o_valid & OBD_MD_FLCOOKIE)
  93                 oti->oti_logcookies = obdo_logcookie(&body->oa);
  94         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
  95         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
  96         req->rq_status = obd_destroy(exp, &body->oa, NULL, oti);
  97         RETURN(0);
  98 }
  99
 100 static int ost_getattr(struct obd_export *exp, struct ptlrpc_request *req)
 101 {
 102         struct ost_body *body, *repbody;
 103         int rc, size = sizeof(*body);
 104         ENTRY;
 105
 106         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 107         if (body == NULL)
 108                 RETURN(-EFAULT);
 109
 110         rc = lustre_pack_reply(req, 1, &size, NULL);
 111         if (rc)
 112                 RETURN(rc);
 113
 114         repbody = lustre_msg_buf (req->rq_repmsg, 0, sizeof(*repbody));
 115         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 116         req->rq_status = obd_getattr(exp, &repbody->oa, NULL);
 117         RETURN(0);
 118 }
 119
 120 static int ost_statfs(struct ptlrpc_request *req)
 121 {
 122         struct obd_statfs *osfs;
 123         int rc, size = sizeof(*osfs);
 124         ENTRY;
 125
 126         rc = lustre_pack_reply(req, 1, &size, NULL);
 127         if (rc)
 128                 RETURN(rc);
 129
 130         osfs = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*osfs));
 131
 132         req->rq_status = obd_statfs(req->rq_export->exp_obd, osfs, jiffies-HZ);
 133         if (req->rq_status != 0)
 134                 CERROR("ost: statfs failed: rc %d\n", req->rq_status);
 135
 136         RETURN(0);
 137 }
 138
 139 static int ost_create(struct obd_export *exp, struct ptlrpc_request *req,
 140                       struct obd_trans_info *oti)
 141 {
 142         struct ost_body *body, *repbody;
 143         int rc, size = sizeof(*repbody);
 144         ENTRY;
 145
 146         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 147         if (body == NULL)
 148                 RETURN(-EFAULT);
 149
 150         rc = lustre_pack_reply(req, 1, &size, NULL);
 151         if (rc)
 152                 RETURN(rc);
 153
 154         repbody = lustre_msg_buf (req->rq_repmsg, 0, sizeof(*repbody));
 155         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 156         oti->oti_logcookies = obdo_logcookie(&repbody->oa);
 157         req->rq_status = obd_create(exp, &repbody->oa, NULL, oti);
 158         //obd_log_cancel(conn, NULL, 1, oti->oti_logcookies, 0);
 159         RETURN(0);
 160 }
 161
 162 static int ost_punch(struct obd_export *exp, struct ptlrpc_request *req,
 163                      struct obd_trans_info *oti)
 164 {
 165         struct ost_body *body, *repbody;
 166         int rc, size = sizeof(*repbody);
 167         ENTRY;
 168
 169         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 170         if (body == NULL)
 171                 RETURN(-EFAULT);
 172
 173         if ((body->oa.o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
 174             (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
 175                 RETURN(-EINVAL);
 176
 177         rc = lustre_pack_reply(req, 1, &size, NULL);
 178         if (rc)
 179                 RETURN(rc);
 180
 181         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 182         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 183         req->rq_status = obd_punch(exp, &repbody->oa, NULL, repbody->oa.o_size,
 184                                    repbody->oa.o_blocks, oti);
 185         RETURN(0);
 186 }
 187
 188 static int ost_sync(struct obd_export *exp, struct ptlrpc_request *req)
 189 {
 190         struct ost_body *body, *repbody;
 191         int rc, size = sizeof(*repbody);
 192         ENTRY;
 193
 194         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 195         if (body == NULL)
 196                 RETURN(-EFAULT);
 197
 198         rc = lustre_pack_reply(req, 1, &size, NULL);
 199         if (rc)
 200                 RETURN(rc);
 201
 202         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 203         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 204         req->rq_status = obd_sync(exp, &repbody->oa, NULL, repbody->oa.o_size,
 205                                   repbody->oa.o_blocks);
 206         RETURN(0);
 207 }
 208
 209 static int ost_setattr(struct obd_export *exp, struct ptlrpc_request *req,
 210                        struct obd_trans_info *oti)
 211 {
 212         struct ost_body *body, *repbody;
 213         int rc, size = sizeof(*repbody);
 214         ENTRY;
 215
 216         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 217         if (body == NULL)
 218                 RETURN(-EFAULT);
 219
 220         rc = lustre_pack_reply(req, 1, &size, NULL);
 221         if (rc)
 222                 RETURN(rc);
 223
 224         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 225         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 226
 227         req->rq_status = obd_setattr(exp, &repbody->oa, NULL, oti);
 228         RETURN(0);
 229 }
 230
 231 static int ost_bulk_timeout(void *data)
 232 {
 233         ENTRY;
 234         /* We don't fail the connection here, because having the export
 235          * killed makes the (vital) call to commitrw very sad.
 236          */
 237         RETURN(1);
 238 }
 239
 240 static int get_per_page_niobufs(struct obd_ioobj *ioo, int nioo,
 241                                 struct niobuf_remote *rnb, int nrnb,
 242                                 struct niobuf_remote **pp_rnbp)
 243 {
 244         /* Copy a remote niobuf, splitting it into page-sized chunks
 245          * and setting ioo[i].ioo_bufcnt accordingly */
 246         struct niobuf_remote *pp_rnb;
 247         int   i;
 248         int   j;
 249         int   page;
 250         int   rnbidx = 0;
 251         int   npages = 0;
 252
 253         /* first count and check the number of pages required */
 254         for (i = 0; i < nioo; i++)
 255                 for (j = 0; j < ioo->ioo_bufcnt; j++, rnbidx++) {
 256                         obd_off offset = rnb[rnbidx].offset;
 257                         obd_off p0 = offset >> PAGE_SHIFT;
 258                         obd_off pn = (offset + rnb[rnbidx].len - 1)>>PAGE_SHIFT;
 259
 260                         LASSERT(rnbidx < nrnb);
 261
 262                         npages += (pn + 1 - p0);
 263
 264                         if (rnb[rnbidx].len == 0) {
 265                                 CERROR("zero len BRW: obj %d objid "LPX64
 266                                        " buf %u\n", i, ioo[i].ioo_id, j);
 267                                 return -EINVAL;
 268                         }
 269                         if (j > 0 &&
 270                             rnb[rnbidx].offset <= rnb[rnbidx-1].offset) {
 271                                 CERROR("unordered BRW: obj %d objid "LPX64
 272                                        " buf %u offset "LPX64" <= "LPX64"\n",
 273                                        i, ioo[i].ioo_id, j, rnb[rnbidx].offset,
 274                                        rnb[rnbidx].offset);
 275                                 return -EINVAL;
 276                         }
 277                 }
 278
 279         LASSERT(rnbidx == nrnb);
 280
 281         if (npages == nrnb) {       /* all niobufs are for single pages */
 282                 *pp_rnbp = rnb;
 283                 return npages;
 284         }
 285
 286         OBD_ALLOC(pp_rnb, sizeof(*pp_rnb) * npages);
 287         if (pp_rnb == NULL)
 288                 return -ENOMEM;
 289
 290         /* now do the actual split */
 291         page = rnbidx = 0;
 292         for (i = 0; i < nioo; i++) {
 293                 int  obj_pages = 0;
 294
 295                 for (j = 0; j < ioo[i].ioo_bufcnt; j++, rnbidx++) {
 296                         obd_off off = rnb[rnbidx].offset;
 297                         int     nob = rnb[rnbidx].len;
 298
 299                         LASSERT(rnbidx < nrnb);
 300                         do {
 301                                 obd_off  poff = off & (PAGE_SIZE - 1);
 302                                 int      pnob = (poff + nob > PAGE_SIZE) ?
 303                                                 PAGE_SIZE - poff : nob;
 304
 305                                 LASSERT(page < npages);
 306                                 pp_rnb[page].len = pnob;
 307                                 pp_rnb[page].offset = off;
 308                                 pp_rnb[page].flags = rnb[rnbidx].flags;
 309
 310                                 CDEBUG(0, "   obj %d id "LPX64
 311                                        "page %d(%d) "LPX64" for %d, flg %x\n",
 312                                        i, ioo[i].ioo_id, obj_pages, page,
 313                                        pp_rnb[page].offset, pp_rnb[page].len,
 314                                        pp_rnb[page].flags);
 315                                 page++;
 316                                 obj_pages++;
 317
 318                                 off += pnob;
 319                                 nob -= pnob;
 320                         } while (nob > 0);
 321                         LASSERT(nob == 0);
 322                 }
 323                 ioo[i].ioo_bufcnt = obj_pages;
 324         }
 325         LASSERT(page == npages);
 326
 327         *pp_rnbp = pp_rnb;
 328         return npages;
 329 }
 330
 331 static void free_per_page_niobufs (int npages, struct niobuf_remote *pp_rnb,
 332                                    struct niobuf_remote *rnb)
 333 {
 334         if (pp_rnb == rnb)                      /* didn't allocate above */
 335                 return;
 336
 337         OBD_FREE(pp_rnb, sizeof(*pp_rnb) * npages);
 338 }
 339
 340 #if CHECKSUM_BULK
 341 obd_count ost_checksum_bulk(struct ptlrpc_bulk_desc *desc)
 342 {
 343         obd_count cksum = 0;
 344         struct ptlrpc_bulk_page *bp;
 345
 346         list_for_each_entry(bp, &desc->bd_page_list, bp_link) {
 347                 ost_checksum(&cksum, kmap(bp->bp_page) + bp->bp_pageoffset,
 348                              bp->bp_buflen);
 349                 kunmap(bp->bp_page);
 350         }
 351
 352         return cksum;
 353 }
 354 #endif
 355
 356 static int ost_brw_read(struct ptlrpc_request *req)
 357 {
 358         struct ptlrpc_bulk_desc *desc;
 359         struct niobuf_remote    *remote_nb;
 360         struct niobuf_remote    *pp_rnb;
 361         struct niobuf_local     *local_nb;
 362         struct obd_ioobj        *ioo;
 363         struct ost_body         *body, *repbody;
 364         struct l_wait_info       lwi;
 365         struct obd_trans_info    oti = { 0 };
 366         char                     str[PTL_NALFMT_SIZE];
 367         int                      size[1] = { sizeof(*body) };
 368         int                      comms_error = 0;
 369         int                      niocount;
 370         int                      npages;
 371         int                      nob = 0;
 372         int                      rc;
 373         int                      i;
 374         ENTRY;
 375
 376         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
 377                 GOTO(out, rc = -EIO);
 378
 379         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 380                          (obd_timeout + 1) / 4);
 381
 382         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 383         if (body == NULL) {
 384                 CERROR("Missing/short ost_body\n");
 385                 GOTO(out, rc = -EFAULT);
 386         }
 387
 388         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 389         if (ioo == NULL) {
 390                 CERROR("Missing/short ioobj\n");
 391                 GOTO(out, rc = -EFAULT);
 392         }
 393
 394         niocount = ioo->ioo_bufcnt;
 395         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 396                                        lustre_swab_niobuf_remote);
 397         if (remote_nb == NULL) {
 398                 CERROR("Missing/short niobuf\n");
 399                 GOTO(out, rc = -EFAULT);
 400         }
 401         if (lustre_msg_swabbed(req->rq_reqmsg)) { /* swab remaining niobufs */
 402                 for (i = 1; i < niocount; i++)
 403                         lustre_swab_niobuf_remote (&remote_nb[i]);
 404         }
 405
 406         rc = lustre_pack_reply(req, 1, size, NULL);
 407         if (rc)
 408                 GOTO(out, rc);
 409
 410         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 411         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 412         npages = get_per_page_niobufs(ioo, 1, remote_nb, niocount, &pp_rnb);
 413         if (npages < 0)
 414                 GOTO(out, rc = npages);
 415
 416         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 417         if (local_nb == NULL)
 418                 GOTO(out_pp_rnb, rc = -ENOMEM);
 419
 420         desc = ptlrpc_prep_bulk_exp(req, BULK_PUT_SOURCE, OST_BULK_PORTAL);
 421         if (desc == NULL)
 422                 GOTO(out_local, rc = -ENOMEM);
 423
 424         rc = obd_preprw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 425                         ioo, npages, pp_rnb, local_nb, &oti);
 426         if (rc != 0)
 427                 GOTO(out_bulk, rc);
 428
 429         nob = 0;
 430         for (i = 0; i < npages; i++) {
 431                 int page_rc = local_nb[i].rc;
 432
 433                 if (page_rc < 0) {              /* error */
 434                         rc = page_rc;
 435                         break;
 436                 }
 437
 438                 LASSERT(page_rc <= pp_rnb[i].len);
 439                 nob += page_rc;
 440                 if (page_rc != 0) {             /* some data! */
 441                         LASSERT (local_nb[i].page != NULL);
 442                         rc = ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 443                                                    pp_rnb[i].offset& ~PAGE_MASK,
 444                                                    page_rc);
 445                         if (rc != 0)
 446                                 break;
 447                 }
 448
 449                 if (page_rc != pp_rnb[i].len) { /* short read */
 450                         /* All subsequent pages should be 0 */
 451                         while(++i < npages)
 452                                 LASSERT(local_nb[i].rc == 0);
 453                         break;
 454                 }
 455         }
 456
 457         if (rc == 0) {
 458                 rc = ptlrpc_bulk_put(desc);
 459                 if (rc == 0) {
 460                         lwi = LWI_TIMEOUT(obd_timeout * HZ / 4,
 461                                           ost_bulk_timeout, desc);
 462                         rc = l_wait_event(desc->bd_waitq,
 463                                           ptlrpc_bulk_complete(desc), &lwi);
 464                         if (rc) {
 465                                 LASSERT(rc == -ETIMEDOUT);
 466                                 DEBUG_REQ(D_ERROR, req, "timeout on bulk PUT");
 467                                 ptlrpc_abort_bulk(desc);
 468                         }
 469                 } else {
 470                         DEBUG_REQ(D_ERROR, req, "bulk PUT failed: rc %d\n", rc);
 471                 }
 472                 comms_error = rc != 0;
 473         }
 474
 475         /* Must commit after prep above in all cases */
 476         rc = obd_commitrw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 477                           ioo, npages, local_nb, &oti);
 478
 479         if (rc == 0) {
 480                 repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 481                 memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 482
 483 #if CHECKSUM_BULK
 484                 repbody->oa.o_cksum = ost_checksum_bulk(desc);
 485                 repbody->oa.o_valid |= OBD_MD_FLCKSUM;
 486 #endif
 487         }
 488
 489  out_bulk:
 490         ptlrpc_free_bulk(desc);
 491  out_local:
 492         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 493  out_pp_rnb:
 494         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 495  out:
 496         LASSERT(rc <= 0);
 497         if (rc == 0) {
 498                 req->rq_status = nob;
 499                 ptlrpc_reply(req);
 500         } else if (!comms_error) {
 501                 /* only reply if comms OK */
 502                 req->rq_status = rc;
 503                 ptlrpc_error(req);
 504         } else {
 505                 if (req->rq_repmsg != NULL) {
 506                         /* reply out callback would free */
 507                         OBD_FREE(req->rq_repmsg, req->rq_replen);
 508                 }
 509                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 510                         CERROR("bulk IO comms error: "
 511                                "evicting %s@%s nid "LPX64" (%s)\n",
 512                                req->rq_export->exp_client_uuid.uuid,
 513                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 514                                req->rq_peer.peer_nid,
 515                                portals_nid2str(req->rq_peer.peer_ni->pni_number,
 516                                                req->rq_peer.peer_nid,
 517                                                str));
 518                         ptlrpc_fail_export(req->rq_export);
 519                 } else {
 520                         CERROR("ignoring bulk IO comms error: "
 521                                "client reconnected %s@%s nid "LPX64" (%s)\n",
 522                                req->rq_export->exp_client_uuid.uuid,
 523                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 524                                req->rq_peer.peer_nid,
 525                                portals_nid2str(req->rq_peer.peer_ni->pni_number,
 526                                                req->rq_peer.peer_nid,
 527                                                str));
 528                 }
 529         }
 530
 531         RETURN(rc);
 532 }
 533
 534 static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
 535 {
 536         struct ptlrpc_bulk_desc *desc;
 537         struct niobuf_remote    *remote_nb;
 538         struct niobuf_remote    *pp_rnb;
 539         struct niobuf_local     *local_nb;
 540         struct obd_ioobj        *ioo;
 541         struct ost_body         *body, *repbody;
 542         struct l_wait_info       lwi;
 543         __u32                   *rcs;
 544         int                      size[2] = { sizeof(*body) };
 545         int                      objcount, niocount, npages;
 546         int                      comms_error = 0;
 547         int                      rc, rc2, swab, i, j;
 548         char                    str[PTL_NALFMT_SIZE];
 549         ENTRY;
 550
 551         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
 552                 GOTO(out, rc = -EIO);
 553
 554         /* pause before transaction has been started */
 555         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 556                          (obd_timeout + 1) / 4);
 557
 558         swab = lustre_msg_swabbed(req->rq_reqmsg);
 559         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 560         if (body == NULL) {
 561                 CERROR("Missing/short ost_body\n");
 562                 GOTO(out, rc = -EFAULT);
 563         }
 564
 565         LASSERT_REQSWAB(req, 1);
 566         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 567         if (objcount == 0) {
 568                 CERROR("Missing/short ioobj\n");
 569                 GOTO(out, rc = -EFAULT);
 570         }
 571         ioo = lustre_msg_buf (req->rq_reqmsg, 1, objcount * sizeof(*ioo));
 572         LASSERT (ioo != NULL);
 573         for (niocount = i = 0; i < objcount; i++) {
 574                 if (swab)
 575                         lustre_swab_obd_ioobj (&ioo[i]);
 576                 if (ioo[i].ioo_bufcnt == 0) {
 577                         CERROR("ioo[%d] has zero bufcnt\n", i);
 578                         GOTO(out, rc = -EFAULT);
 579                 }
 580                 niocount += ioo[i].ioo_bufcnt;
 581         }
 582
 583         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 584                                        lustre_swab_niobuf_remote);
 585         if (remote_nb == NULL) {
 586                 CERROR("Missing/short niobuf\n");
 587                 GOTO(out, rc = -EFAULT);
 588         }
 589         if (swab) {                             /* swab the remaining niobufs */
 590                 for (i = 1; i < niocount; i++)
 591                         lustre_swab_niobuf_remote (&remote_nb[i]);
 592         }
 593
 594         size[1] = niocount * sizeof(*rcs);
 595         rc = lustre_pack_reply(req, 2, size, NULL);
 596         if (rc != 0)
 597                 GOTO(out, rc);
 598         rcs = lustre_msg_buf(req->rq_repmsg, 1, niocount * sizeof(*rcs));
 599
 600         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 601         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 602         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 603         if (npages < 0)
 604                 GOTO(out, rc = npages);
 605
 606         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 607         if (local_nb == NULL)
 608                 GOTO(out_pp_rnb, rc = -ENOMEM);
 609
 610         desc = ptlrpc_prep_bulk_exp(req, BULK_GET_SINK, OST_BULK_PORTAL);
 611         if (desc == NULL)
 612                 GOTO(out_local, rc = -ENOMEM);
 613
 614         rc = obd_preprw(OBD_BRW_WRITE, req->rq_export, &body->oa, objcount,
 615                         ioo, npages, pp_rnb, local_nb, oti);
 616         if (rc != 0)
 617                 GOTO(out_bulk, rc);
 618
 619         /* NB Having prepped, we must commit... */
 620
 621         for (i = 0; i < npages; i++) {
 622                 rc = ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 623                                            pp_rnb[i].offset & (PAGE_SIZE - 1),
 624                                            pp_rnb[i].len);
 625                 if (rc != 0)
 626                         break;
 627         }
 628
 629         if (rc == 0) {
 630                 rc = ptlrpc_bulk_get(desc);
 631                 if (rc == 0) {
 632                         lwi = LWI_TIMEOUT(obd_timeout * HZ / 4,
 633                                           ost_bulk_timeout, desc);
 634                         rc = l_wait_event(desc->bd_waitq,
 635                                           ptlrpc_bulk_complete(desc), &lwi);
 636                         if (rc) {
 637                                 LASSERT(rc == -ETIMEDOUT);
 638                                 DEBUG_REQ(D_ERROR, req, "timeout on bulk GET");
 639                                 ptlrpc_abort_bulk(desc);
 640                         }
 641                 } else {
 642                         DEBUG_REQ(D_ERROR, req, "bulk GET failed: rc %d\n", rc);
 643                 }
 644                 comms_error = rc != 0;
 645         }
 646
 647         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 648         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 649
 650 #if CHECKSUM_BULK
 651         if (rc == 0 && (body->oa.o_valid & OBD_MD_FLCKSUM) != 0) {
 652                 static int cksum_counter;
 653                 obd_count client_cksum = body->oa.o_cksum;
 654                 obd_count cksum = ost_checksum_bulk(desc);
 655
 656                 portals_nid2str(req->rq_connection->c_peer.peer_ni->pni_number,
 657                                 req->rq_connection->c_peer.peer_nid, str);
 658                 if (client_cksum != cksum) {
 659                         CERROR("Bad checksum: client %x, server %x, client NID "
 660                                LPX64" (%s)\n", client_cksum, cksum,
 661                                req->rq_connection->c_peer.peer_nid, str);
 662                         cksum_counter = 1;
 663                         repbody->oa.o_cksum = cksum;
 664                 } else {
 665                         cksum_counter++;
 666                         if ((cksum_counter & (-cksum_counter)) == cksum_counter)
 667                                 CWARN("Checksum %u from "LPX64": %x OK\n",
 668                                       cksum_counter,
 669                                       req->rq_connection->c_peer.peer_nid,
 670                                       cksum);
 671                 }
 672         }
 673 #endif
 674         /* Must commit after prep above in all cases */
 675         rc2 = obd_commitrw(OBD_BRW_WRITE, req->rq_export, &repbody->oa,
 676                            objcount, ioo, npages, local_nb, oti);
 677
 678         if (rc == 0) {
 679                 /* set per-requested niobuf return codes */
 680                 for (i = j = 0; i < niocount; i++) {
 681                         int nob = remote_nb[i].len;
 682
 683                         rcs[i] = 0;
 684                         do {
 685                                 LASSERT(j < npages);
 686                                 if (local_nb[j].rc < 0)
 687                                         rcs[i] = local_nb[j].rc;
 688                                 nob -= pp_rnb[j].len;
 689                                 j++;
 690                         } while (nob > 0);
 691                         LASSERT(nob == 0);
 692                 }
 693                 LASSERT(j == npages);
 694         }
 695         if (rc == 0)
 696                 rc = rc2;
 697
 698  out_bulk:
 699         ptlrpc_free_bulk(desc);
 700  out_local:
 701         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 702  out_pp_rnb:
 703         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 704  out:
 705         if (rc == 0) {
 706                 oti_to_request(oti, req);
 707                 rc = ptlrpc_reply(req);
 708         } else if (!comms_error) {
 709                 /* Only reply if there was no comms problem with bulk */
 710                 req->rq_status = rc;
 711                 ptlrpc_error(req);
 712         } else {
 713                 if (req->rq_repmsg != NULL) {
 714                         /* reply out callback would free */
 715                         OBD_FREE (req->rq_repmsg, req->rq_replen);
 716                 }
 717                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 718                         CERROR("bulk IO comms error: "
 719                                "evicting %s@%s nid "LPX64" (%s)\n",
 720                                req->rq_export->exp_client_uuid.uuid,
 721                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 722                                req->rq_peer.peer_nid,
 723                                portals_nid2str(req->rq_peer.peer_ni->pni_number,
 724                                                req->rq_peer.peer_nid,
 725                                                str));
 726                         ptlrpc_fail_export(req->rq_export);
 727                 } else {
 728                         CERROR("ignoring bulk IO comms error: "
 729                                "client reconnected %s@%s nid "LPX64" (%s)\n",
 730                                req->rq_export->exp_client_uuid.uuid,
 731                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 732                                req->rq_peer.peer_nid,
 733                                portals_nid2str(req->rq_peer.peer_ni->pni_number,
 734                                                req->rq_peer.peer_nid,
 735                                                str));
 736                 }
 737         }
 738         RETURN(rc);
 739 }
 740
 741 static int ost_san_brw(struct ptlrpc_request *req, int cmd)
 742 {
 743         struct niobuf_remote *remote_nb, *res_nb, *pp_rnb;
 744         struct obd_ioobj *ioo;
 745         struct ost_body *body, *repbody;
 746         int rc, i, objcount, niocount, size[2] = {sizeof(*body)}, npages;
 747         int swab;
 748         ENTRY;
 749
 750         /* XXX not set to use latest protocol */
 751
 752         swab = lustre_msg_swabbed(req->rq_reqmsg);
 753         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 754         if (body == NULL) {
 755                 CERROR("Missing/short ost_body\n");
 756                 GOTO(out, rc = -EFAULT);
 757         }
 758
 759         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 760         if (ioo == NULL) {
 761                 CERROR("Missing/short ioobj\n");
 762                 GOTO(out, rc = -EFAULT);
 763         }
 764         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 765         niocount = ioo[0].ioo_bufcnt;
 766         for (i = 1; i < objcount; i++) {
 767                 if (swab)
 768                         lustre_swab_obd_ioobj (&ioo[i]);
 769                 niocount += ioo[i].ioo_bufcnt;
 770         }
 771
 772         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 773                                        lustre_swab_niobuf_remote);
 774         if (remote_nb == NULL) {
 775                 CERROR("Missing/short niobuf\n");
 776                 GOTO(out, rc = -EFAULT);
 777         }
 778         if (swab) {                             /* swab the remaining niobufs */
 779                 for (i = 1; i < niocount; i++)
 780                         lustre_swab_niobuf_remote (&remote_nb[i]);
 781         }
 782
 783         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 784         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 785         if (npages < 0)
 786                 GOTO (out, rc = npages);
 787
 788         size[1] = npages * sizeof(*pp_rnb);
 789         rc = lustre_pack_reply(req, 2, size, NULL);
 790         if (rc)
 791                 GOTO(out_pp_rnb, rc);
 792
 793         req->rq_status = obd_san_preprw(cmd, req->rq_export, &body->oa,
 794                                         objcount, ioo, npages, pp_rnb);
 795
 796         if (req->rq_status)
 797                 GOTO(out_pp_rnb, rc = 0);
 798
 799         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 800         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 801
 802         res_nb = lustre_msg_buf(req->rq_repmsg, 1, size[1]);
 803         memcpy(res_nb, remote_nb, size[1]);
 804         rc = 0;
 805 out_pp_rnb:
 806         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 807 out:
 808         if (rc) {
 809                 OBD_FREE(req->rq_repmsg, req->rq_replen);
 810                 req->rq_repmsg = NULL;
 811                 req->rq_status = rc;
 812                 ptlrpc_error(req);
 813         } else
 814                 ptlrpc_reply(req);
 815
 816         return rc;
 817 }
 818
 819
 820 static int ost_set_info(struct obd_export *exp, struct ptlrpc_request *req)
 821 {
 822         char *key;
 823         int keylen, rc = 0;
 824         ENTRY;
 825
 826         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 827         if (key == NULL) {
 828                 DEBUG_REQ(D_HA, req, "no set_info key");
 829                 RETURN(-EFAULT);
 830         }
 831         keylen = req->rq_reqmsg->buflens[0];
 832
 833         rc = lustre_pack_reply(req, 0, NULL, NULL);
 834         if (rc)
 835                 RETURN(rc);
 836
 837         rc = obd_set_info(exp, keylen, key, 0, NULL);
 838         req->rq_repmsg->status = 0;
 839         RETURN(rc);
 840 }
 841
 842 static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
 843 {
 844         char *key;
 845         int keylen, rc = 0, size = sizeof(obd_id);
 846         obd_id *reply;
 847         ENTRY;
 848
 849         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 850         if (key == NULL) {
 851                 DEBUG_REQ(D_HA, req, "no get_info key");
 852                 RETURN(-EFAULT);
 853         }
 854         keylen = req->rq_reqmsg->buflens[0];
 855
 856         if (keylen < strlen("last_id") || memcmp(key, "last_id", 7) != 0)
 857                 RETURN(-EPROTO);
 858
 859         rc = lustre_pack_reply(req, 1, &size, NULL);
 860         if (rc)
 861                 RETURN(rc);
 862
 863         reply = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply));
 864         rc = obd_get_info(exp, keylen, key, &size, reply);
 865         req->rq_repmsg->status = 0;
 866         RETURN(rc);
 867 }
 868
 869 static int ost_filter_recovery_request(struct ptlrpc_request *req,
 870                                        struct obd_device *obd, int *process)
 871 {
 872         switch (req->rq_reqmsg->opc) {
 873         case OST_CONNECT: /* This will never get here, but for completeness. */
 874         case OST_DISCONNECT:
 875                *process = 1;
 876                RETURN(0);
 877
 878         case OBD_PING:
 879         case OST_CREATE:
 880         case OST_DESTROY:
 881         case OST_PUNCH:
 882         case OST_SETATTR:
 883         case OST_SYNC:
 884         case OST_WRITE:
 885         case OBD_LOG_CANCEL:
 886         case LDLM_ENQUEUE:
 887                 *process = target_queue_recovery_request(req, obd);
 888                 RETURN(0);
 889
 890         default:
 891                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
 892                 *process = 0;
 893                 /* XXX what should we set rq_status to here? */
 894                 req->rq_status = -EAGAIN;
 895                 RETURN(ptlrpc_error(req));
 896         }
 897 }
 898
 899
 900
 901 static int ost_handle(struct ptlrpc_request *req)
 902 {
 903         struct obd_trans_info trans_info = { 0, };
 904         struct obd_trans_info *oti = &trans_info;
 905         int should_process, fail = OBD_FAIL_OST_ALL_REPLY_NET, rc = 0;
 906         struct obd_export *exp = NULL;
 907         ENTRY;
 908
 909         LASSERT(current->journal_info == NULL);
 910         /* XXX identical to MDS */
 911         if (req->rq_reqmsg->opc != OST_CONNECT) {
 912                 struct obd_device *obd;
 913                 int abort_recovery, recovering;
 914
 915                 exp = req->rq_export;
 916
 917                 if (exp == NULL) {
 918                         CDEBUG(D_HA, "operation %d on unconnected OST\n",
 919                                req->rq_reqmsg->opc);
 920                         req->rq_status = -ENOTCONN;
 921                         GOTO(out, rc = -ENOTCONN);
 922                 }
 923
 924                 obd = exp->exp_obd;
 925
 926                 /* Check for aborted recovery. */
 927                 spin_lock_bh(&obd->obd_processing_task_lock);
 928                 abort_recovery = obd->obd_abort_recovery;
 929                 recovering = obd->obd_recovering;
 930                 spin_unlock_bh(&obd->obd_processing_task_lock);
 931                 if (abort_recovery) {
 932                         target_abort_recovery(obd);
 933                 } else if (recovering) {
 934                         rc = ost_filter_recovery_request(req, obd,
 935                                                          &should_process);
 936                         if (rc || !should_process)
 937                                 RETURN(rc);
 938                 }
 939         }
 940
 941         oti_init(oti, req);
 942
 943         switch (req->rq_reqmsg->opc) {
 944         case OST_CONNECT: {
 945                 CDEBUG(D_INODE, "connect\n");
 946                 OBD_FAIL_RETURN(OBD_FAIL_OST_CONNECT_NET, 0);
 947                 rc = target_handle_connect(req, ost_handle);
 948                 break;
 949         }
 950         case OST_DISCONNECT:
 951                 CDEBUG(D_INODE, "disconnect\n");
 952                 OBD_FAIL_RETURN(OBD_FAIL_OST_DISCONNECT_NET, 0);
 953                 rc = target_handle_disconnect(req);
 954                 break;
 955         case OST_CREATE:
 956                 CDEBUG(D_INODE, "create\n");
 957                 OBD_FAIL_RETURN(OBD_FAIL_OST_CREATE_NET, 0);
 958                 rc = ost_create(exp, req, oti);
 959                 break;
 960         case OST_DESTROY:
 961                 CDEBUG(D_INODE, "destroy\n");
 962                 OBD_FAIL_RETURN(OBD_FAIL_OST_DESTROY_NET, 0);
 963                 rc = ost_destroy(exp, req, oti);
 964                 break;
 965         case OST_GETATTR:
 966                 CDEBUG(D_INODE, "getattr\n");
 967                 OBD_FAIL_RETURN(OBD_FAIL_OST_GETATTR_NET, 0);
 968                 rc = ost_getattr(exp, req);
 969                 break;
 970         case OST_SETATTR:
 971                 CDEBUG(D_INODE, "setattr\n");
 972                 OBD_FAIL_RETURN(OBD_FAIL_OST_SETATTR_NET, 0);
 973                 rc = ost_setattr(exp, req, oti);
 974                 break;
 975         case OST_WRITE:
 976                 CDEBUG(D_INODE, "write\n");
 977                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 978                 rc = ost_brw_write(req, oti);
 979                 LASSERT(current->journal_info == NULL);
 980                 /* ost_brw sends its own replies */
 981                 RETURN(rc);
 982         case OST_READ:
 983                 CDEBUG(D_INODE, "read\n");
 984                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 985                 rc = ost_brw_read(req);
 986                 LASSERT(current->journal_info == NULL);
 987                 /* ost_brw sends its own replies */
 988                 RETURN(rc);
 989         case OST_SAN_READ:
 990                 CDEBUG(D_INODE, "san read\n");
 991                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 992                 rc = ost_san_brw(req, OBD_BRW_READ);
 993                 /* ost_san_brw sends its own replies */
 994                 RETURN(rc);
 995         case OST_SAN_WRITE:
 996                 CDEBUG(D_INODE, "san write\n");
 997                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 998                 rc = ost_san_brw(req, OBD_BRW_WRITE);
 999                 /* ost_san_brw sends its own replies */
1000                 RETURN(rc);
1001         case OST_PUNCH:
1002                 CDEBUG(D_INODE, "punch\n");
1003                 OBD_FAIL_RETURN(OBD_FAIL_OST_PUNCH_NET, 0);
1004                 rc = ost_punch(exp, req, oti);
1005                 break;
1006         case OST_STATFS:
1007                 CDEBUG(D_INODE, "statfs\n");
1008                 OBD_FAIL_RETURN(OBD_FAIL_OST_STATFS_NET, 0);
1009                 rc = ost_statfs(req);
1010                 break;
1011         case OST_SYNC:
1012                 CDEBUG(D_INODE, "sync\n");
1013                 OBD_FAIL_RETURN(OBD_FAIL_OST_SYNC_NET, 0);
1014                 rc = ost_sync(exp, req);
1015                 break;
1016         case OST_SET_INFO:
1017                 DEBUG_REQ(D_INODE, req, "set_info");
1018                 rc = ost_set_info(exp, req);
1019                 break;
1020         case OST_GET_INFO:
1021                 DEBUG_REQ(D_INODE, req, "get_info");
1022                 rc = ost_get_info(exp, req);
1023                 break;
1024         case OBD_PING:
1025                 DEBUG_REQ(D_INODE, req, "ping");
1026                 rc = target_handle_ping(req);
1027                 break;
1028         /* FIXME - just reply status */
1029         case LLOG_ORIGIN_CONNECT:
1030                 DEBUG_REQ(D_INODE, req, "log connect\n");
1031                 rc = llog_handle_connect(req);
1032                 req->rq_status = rc;
1033                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1034                 if (rc)
1035                         RETURN(rc);
1036                 RETURN(ptlrpc_reply(req));
1037         case OBD_LOG_CANCEL:
1038                 CDEBUG(D_INODE, "log cancel\n");
1039                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOG_CANCEL_NET, 0);
1040                 rc = llog_origin_handle_cancel(req);
1041                 req->rq_status = rc;
1042                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1043                 if (rc)
1044                         RETURN(rc);
1045                 RETURN(ptlrpc_reply(req));
1046         case LDLM_ENQUEUE:
1047                 CDEBUG(D_INODE, "enqueue\n");
1048                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
1049                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1050                                          ldlm_server_blocking_ast);
1051                 fail = OBD_FAIL_OST_LDLM_REPLY_NET;
1052                 break;
1053         case LDLM_CONVERT:
1054                 CDEBUG(D_INODE, "convert\n");
1055                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
1056                 rc = ldlm_handle_convert(req);
1057                 break;
1058         case LDLM_CANCEL:
1059                 CDEBUG(D_INODE, "cancel\n");
1060                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CANCEL, 0);
1061                 rc = ldlm_handle_cancel(req);
1062                 break;
1063         case LDLM_BL_CALLBACK:
1064         case LDLM_CP_CALLBACK:
1065                 CDEBUG(D_INODE, "callback\n");
1066                 CERROR("callbacks should not happen on OST\n");
1067                 /* fall through */
1068         default:
1069                 CERROR("Unexpected opcode %d\n", req->rq_reqmsg->opc);
1070                 req->rq_status = -ENOTSUPP;
1071                 rc = ptlrpc_error(req);
1072                 RETURN(rc);
1073         }
1074
1075         LASSERT(current->journal_info == NULL);
1076
1077         EXIT;
1078         /* If we're DISCONNECTing, the export_data is already freed */
1079         if (!rc && req->rq_reqmsg->opc != OST_DISCONNECT) {
1080                 struct obd_device *obd  = req->rq_export->exp_obd;
1081                 if (!obd->obd_no_transno) {
1082                         req->rq_repmsg->last_committed =
1083                                 obd->obd_last_committed;
1084                 } else {
1085                         DEBUG_REQ(D_IOCTL, req,
1086                                   "not sending last_committed update");
1087                 }
1088                 CDEBUG(D_INFO, "last_committed "LPU64", xid "LPX64"\n",
1089                        obd->obd_last_committed, req->rq_xid);
1090         }
1091
1092 out:
1093         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LAST_REPLAY) {
1094                 struct obd_device *obd = req->rq_export->exp_obd;
1095
1096                 if (obd && obd->obd_recovering) {
1097                         DEBUG_REQ(D_HA, req, "LAST_REPLAY, queuing reply");
1098                         return target_queue_final_reply(req, rc);
1099                 }
1100                 /* Lost a race with recovery; let the error path DTRT. */
1101                 rc = req->rq_status = -ENOTCONN;
1102         }
1103
1104         if (!rc)
1105                 oti_to_request(oti, req);
1106
1107         target_send_reply(req, rc, fail);
1108         return 0;
1109 }
1110
1111 static int ost_setup(struct obd_device *obddev, obd_count len, void *buf)
1112 {
1113         struct ost_obd *ost = &obddev->u.ost;
1114         int rc;
1115         ENTRY;
1116
1117         /* Get rid of unneeded supplementary groups */
1118         current->ngroups = 0;
1119         memset(current->groups, 0, sizeof(current->groups));
1120
1121         rc = llog_start_commit_thread();
1122         if (rc < 0)
1123                 RETURN(rc);
1124
1125         ost->ost_service = ptlrpc_init_svc(OST_NEVENTS, OST_NBUFS,
1126                                            OST_BUFSIZE, OST_MAXREQSIZE,
1127                                            OST_REQUEST_PORTAL, OSC_REPLY_PORTAL,
1128                                            ost_handle, "ost",
1129                                            obddev->obd_proc_entry);
1130         if (ost->ost_service == NULL) {
1131                 CERROR("failed to start service\n");
1132                 RETURN(-ENOMEM);
1133         }
1134
1135         rc = ptlrpc_start_n_threads(obddev, ost->ost_service, OST_NUM_THREADS,
1136                                  "ll_ost");
1137         if (rc)
1138                 GOTO(out, rc = -EINVAL);
1139
1140         ost->ost_create_service =
1141                 ptlrpc_init_svc(OST_NEVENTS, OST_NBUFS, OST_BUFSIZE,
1142                                 OST_MAXREQSIZE, OST_CREATE_PORTAL,
1143                                 OSC_REPLY_PORTAL, ost_handle, "ost_create",
1144                                 obddev->obd_proc_entry);
1145         if (ost->ost_create_service == NULL) {
1146                 CERROR("failed to start OST create service\n");
1147                 GOTO(out, rc = -ENOMEM);
1148         }
1149
1150         rc = ptlrpc_start_n_threads(obddev, ost->ost_create_service, 1,
1151                                     "ll_ost_create");
1152         if (rc)
1153                 GOTO(out_create, rc = -EINVAL);
1154
1155         RETURN(0);
1156
1157 out_create:
1158         ptlrpc_unregister_service(ost->ost_create_service);
1159 out:
1160         ptlrpc_unregister_service(ost->ost_service);
1161         RETURN(rc);
1162 }
1163
1164 static int ost_cleanup(struct obd_device *obddev, int flags)
1165 {
1166         struct ost_obd *ost = &obddev->u.ost;
1167         int err = 0;
1168         ENTRY;
1169
1170         spin_lock_bh(&obddev->obd_processing_task_lock);
1171         if (obddev->obd_recovering) {
1172                 target_cancel_recovery_timer(obddev);
1173                 obddev->obd_recovering = 0;
1174         }
1175         spin_unlock_bh(&obddev->obd_processing_task_lock);
1176
1177         ptlrpc_stop_all_threads(ost->ost_service);
1178         ptlrpc_unregister_service(ost->ost_service);
1179
1180         ptlrpc_stop_all_threads(ost->ost_create_service);
1181         ptlrpc_unregister_service(ost->ost_create_service);
1182
1183         RETURN(err);
1184 }
1185
1186 int ost_attach(struct obd_device *dev, obd_count len, void *data)
1187 {
1188         struct lprocfs_static_vars lvars;
1189
1190         lprocfs_init_vars(ost,&lvars);
1191         return lprocfs_obd_attach(dev, lvars.obd_vars);
1192 }
1193
1194 int ost_detach(struct obd_device *dev)
1195 {
1196         return lprocfs_obd_detach(dev);
1197 }
1198
1199 /* use obd ops to offer management infrastructure */
1200 static struct obd_ops ost_obd_ops = {
1201         o_owner:        THIS_MODULE,
1202         o_attach:       ost_attach,
1203         o_detach:       ost_detach,
1204         o_setup:        ost_setup,
1205         o_cleanup:      ost_cleanup,
1206 };
1207
1208 static int __init ost_init(void)
1209 {
1210         struct lprocfs_static_vars lvars;
1211         ENTRY;
1212
1213         lprocfs_init_vars(ost,&lvars);
1214         RETURN(class_register_type(&ost_obd_ops, lvars.module_vars,
1215                                    LUSTRE_OST_NAME));
1216 }
1217
1218 static void /*__exit*/ ost_exit(void)
1219 {
1220         class_unregister_type(LUSTRE_OST_NAME);
1221 }
1222
1223 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1224 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
1225 MODULE_LICENSE("GPL");
1226
1227 module_init(ost_init);
1228 module_exit(ost_exit);