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->flags;
 309
 310                                 CDEBUG(D_PAGE, "   obj %d id "LPX64
 311                                        "page %d(%d) "LPX64" for %d\n",
 312                                        i, ioo[i].ioo_id, obj_pages, page,
 313                                        pp_rnb[page].offset, pp_rnb[page].len);
 314                                 page++;
 315                                 obj_pages++;
 316
 317                                 off += pnob;
 318                                 nob -= pnob;
 319                         } while (nob > 0);
 320                         LASSERT(nob == 0);
 321                 }
 322                 ioo[i].ioo_bufcnt = obj_pages;
 323         }
 324         LASSERT(page == npages);
 325
 326         *pp_rnbp = pp_rnb;
 327         return npages;
 328 }
 329
 330 static void free_per_page_niobufs (int npages, struct niobuf_remote *pp_rnb,
 331                                    struct niobuf_remote *rnb)
 332 {
 333         if (pp_rnb == rnb)                      /* didn't allocate above */
 334                 return;
 335
 336         OBD_FREE(pp_rnb, sizeof(*pp_rnb) * npages);
 337 }
 338
 339 #if CHECKSUM_BULK
 340 obd_count ost_checksum_bulk(struct ptlrpc_bulk_desc *desc)
 341 {
 342         obd_count cksum = 0;
 343         struct ptlrpc_bulk_page *bp;
 344
 345         list_for_each_entry(bp, &desc->bd_page_list, bp_link) {
 346                 ost_checksum(&cksum, kmap(bp->bp_page) + bp->bp_pageoffset,
 347                              bp->bp_buflen);
 348                 kunmap(bp->bp_page);
 349         }
 350
 351         return cksum;
 352 }
 353 #endif
 354
 355 static int ost_brw_read(struct ptlrpc_request *req)
 356 {
 357         struct ptlrpc_bulk_desc *desc;
 358         struct niobuf_remote    *remote_nb;
 359         struct niobuf_remote    *pp_rnb;
 360         struct niobuf_local     *local_nb;
 361         struct obd_ioobj        *ioo;
 362         struct ost_body         *body, *repbody;
 363         struct l_wait_info       lwi;
 364         struct obd_trans_info    oti = { 0 };
 365         char                     str[PTL_NALFMT_SIZE];
 366         int                      size[1] = { sizeof(*body) };
 367         int                      comms_error = 0;
 368         int                      niocount;
 369         int                      npages;
 370         int                      nob = 0;
 371         int                      rc;
 372         int                      i;
 373         ENTRY;
 374
 375         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
 376                 GOTO(out, rc = -EIO);
 377
 378         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 379                          (obd_timeout + 1) / 4);
 380
 381         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 382         if (body == NULL) {
 383                 CERROR("Missing/short ost_body\n");
 384                 GOTO(out, rc = -EFAULT);
 385         }
 386
 387         /* BUG 974: when we send back cache grants, don't clear this flag */
 388         body->oa.o_valid &= ~OBD_MD_FLRDEV;
 389
 390         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 391         if (ioo == NULL) {
 392                 CERROR("Missing/short ioobj\n");
 393                 GOTO(out, rc = -EFAULT);
 394         }
 395
 396         niocount = ioo->ioo_bufcnt;
 397         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 398                                        lustre_swab_niobuf_remote);
 399         if (remote_nb == NULL) {
 400                 CERROR("Missing/short niobuf\n");
 401                 GOTO(out, rc = -EFAULT);
 402         }
 403         if (lustre_msg_swabbed(req->rq_reqmsg)) { /* swab remaining niobufs */
 404                 for (i = 1; i < niocount; i++)
 405                         lustre_swab_niobuf_remote (&remote_nb[i]);
 406         }
 407
 408         rc = lustre_pack_reply(req, 1, size, NULL);
 409         if (rc)
 410                 GOTO(out, rc);
 411
 412         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 413         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 414         npages = get_per_page_niobufs(ioo, 1, remote_nb, niocount, &pp_rnb);
 415         if (npages < 0)
 416                 GOTO(out, rc = npages);
 417
 418         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 419         if (local_nb == NULL)
 420                 GOTO(out_pp_rnb, rc = -ENOMEM);
 421
 422         desc = ptlrpc_prep_bulk_exp(req, BULK_PUT_SOURCE, OST_BULK_PORTAL);
 423         if (desc == NULL)
 424                 GOTO(out_local, rc = -ENOMEM);
 425
 426         rc = obd_preprw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 427                         ioo, npages, pp_rnb, local_nb, &oti);
 428         if (rc != 0)
 429                 GOTO(out_bulk, rc);
 430
 431         nob = 0;
 432         for (i = 0; i < npages; i++) {
 433                 int page_rc = local_nb[i].rc;
 434
 435                 if (page_rc < 0) {              /* error */
 436                         rc = page_rc;
 437                         break;
 438                 }
 439
 440                 LASSERT(page_rc <= pp_rnb[i].len);
 441                 nob += page_rc;
 442                 if (page_rc != 0) {             /* some data! */
 443                         LASSERT (local_nb[i].page != NULL);
 444                         rc = ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 445                                                    pp_rnb[i].offset& ~PAGE_MASK,
 446                                                    page_rc);
 447                         if (rc != 0)
 448                                 break;
 449                 }
 450
 451                 if (page_rc != pp_rnb[i].len) { /* short read */
 452                         /* All subsequent pages should be 0 */
 453                         while(++i < npages)
 454                                 LASSERT(local_nb[i].rc == 0);
 455                         break;
 456                 }
 457         }
 458
 459         if (rc == 0) {
 460                 rc = ptlrpc_bulk_put(desc);
 461                 if (rc == 0) {
 462                         lwi = LWI_TIMEOUT(obd_timeout * HZ / 4,
 463                                           ost_bulk_timeout, desc);
 464                         rc = l_wait_event(desc->bd_waitq,
 465                                           ptlrpc_bulk_complete(desc), &lwi);
 466                         if (rc) {
 467                                 LASSERT(rc == -ETIMEDOUT);
 468                                 DEBUG_REQ(D_ERROR, req, "timeout on bulk PUT");
 469                                 ptlrpc_abort_bulk(desc);
 470                         }
 471                 } else {
 472                         DEBUG_REQ(D_ERROR, req, "bulk PUT failed: rc %d\n", rc);
 473                 }
 474                 comms_error = rc != 0;
 475         }
 476
 477         /* Must commit after prep above in all cases */
 478         rc = obd_commitrw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 479                           ioo, npages, local_nb, &oti);
 480
 481         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 482         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 483
 484 #if CHECKSUM_BULK
 485         if (rc == 0) {
 486                 repbody->oa.o_nlink = ost_checksum_bulk(desc);
 487                 repbody->oa.o_valid |= OBD_MD_FLCKSUM;
 488         }
 489 #endif
 490
 491  out_bulk:
 492         ptlrpc_free_bulk(desc);
 493  out_local:
 494         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 495  out_pp_rnb:
 496         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 497  out:
 498         LASSERT(rc <= 0);
 499         if (rc == 0) {
 500                 req->rq_status = nob;
 501                 ptlrpc_reply(req);
 502         } else if (!comms_error) {
 503                 /* only reply if comms OK */
 504                 req->rq_status = rc;
 505                 ptlrpc_error(req);
 506         } else {
 507                 if (req->rq_repmsg != NULL) {
 508                         /* reply out callback would free */
 509                         OBD_FREE(req->rq_repmsg, req->rq_replen);
 510                 }
 511                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 512                         CERROR("bulk IO comms error: "
 513                                "evicting %s@%s nid "LPX64" (%s)\n",
 514                                req->rq_export->exp_client_uuid.uuid,
 515                                req->rq_connection->c_remote_uuid.uuid,
 516                                req->rq_connection->c_peer.peer_nid,
 517                                portals_nid2str(req->rq_connection->c_peer.peer_ni->pni_number,
 518                                                req->rq_connection->c_peer.peer_nid,
 519                                                str));
 520                         ptlrpc_fail_export(req->rq_export);
 521                 } else {
 522                         CERROR("ignoring bulk IO comms error: "
 523                                "client reconnected %s@%s nid "LPX64" (%s)\n",
 524                                req->rq_export->exp_client_uuid.uuid,
 525                                req->rq_connection->c_remote_uuid.uuid,
 526                                req->rq_connection->c_peer.peer_nid,
 527                                portals_nid2str(req->rq_connection->c_peer.peer_ni->pni_number,
 528                                                req->rq_connection->c_peer.peer_nid,
 529                                                str));
 530                 }
 531         }
 532
 533         RETURN(rc);
 534 }
 535
 536 static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
 537 {
 538         struct ptlrpc_bulk_desc *desc;
 539         struct niobuf_remote    *remote_nb;
 540         struct niobuf_remote    *pp_rnb;
 541         struct niobuf_local     *local_nb;
 542         struct obd_ioobj        *ioo;
 543         struct ost_body         *body, *repbody;
 544         struct l_wait_info       lwi;
 545         __u32                   *rcs;
 546         int                      size[2] = { sizeof(*body) };
 547         int                      objcount, niocount, npages;
 548         int                      comms_error = 0;
 549         int                      rc, rc2, swab, i, j;
 550         char                    str[PTL_NALFMT_SIZE];
 551         ENTRY;
 552
 553         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
 554                 GOTO(out, rc = -EIO);
 555
 556         /* pause before transaction has been started */
 557         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 558                          (obd_timeout + 1) / 4);
 559
 560         swab = lustre_msg_swabbed(req->rq_reqmsg);
 561         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 562         if (body == NULL) {
 563                 CERROR("Missing/short ost_body\n");
 564                 GOTO(out, rc = -EFAULT);
 565         }
 566
 567         /* BUG 974: when we send back cache grants, don't clear this flag */
 568         body->oa.o_valid &= ~OBD_MD_FLRDEV;
 569
 570         LASSERT_REQSWAB(req, 1);
 571         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 572         if (objcount == 0) {
 573                 CERROR("Missing/short ioobj\n");
 574                 GOTO(out, rc = -EFAULT);
 575         }
 576         ioo = lustre_msg_buf (req->rq_reqmsg, 1, objcount * sizeof(*ioo));
 577         LASSERT (ioo != NULL);
 578         for (niocount = i = 0; i < objcount; i++) {
 579                 if (swab)
 580                         lustre_swab_obd_ioobj (&ioo[i]);
 581                 if (ioo[i].ioo_bufcnt == 0) {
 582                         CERROR("ioo[%d] has zero bufcnt\n", i);
 583                         GOTO(out, rc = -EFAULT);
 584                 }
 585                 niocount += ioo[i].ioo_bufcnt;
 586         }
 587
 588         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 589                                        lustre_swab_niobuf_remote);
 590         if (remote_nb == NULL) {
 591                 CERROR("Missing/short niobuf\n");
 592                 GOTO(out, rc = -EFAULT);
 593         }
 594         if (swab) {                             /* swab the remaining niobufs */
 595                 for (i = 1; i < niocount; i++)
 596                         lustre_swab_niobuf_remote (&remote_nb[i]);
 597         }
 598
 599         size[1] = niocount * sizeof(*rcs);
 600         rc = lustre_pack_reply(req, 2, size, NULL);
 601         if (rc != 0)
 602                 GOTO(out, rc);
 603         rcs = lustre_msg_buf(req->rq_repmsg, 1, niocount * sizeof(*rcs));
 604
 605         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 606         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 607         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 608         if (npages < 0)
 609                 GOTO(out, rc = npages);
 610
 611         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 612         if (local_nb == NULL)
 613                 GOTO(out_pp_rnb, rc = -ENOMEM);
 614
 615         desc = ptlrpc_prep_bulk_exp(req, BULK_GET_SINK, OST_BULK_PORTAL);
 616         if (desc == NULL)
 617                 GOTO(out_local, rc = -ENOMEM);
 618
 619         rc = obd_preprw(OBD_BRW_WRITE, req->rq_export, &body->oa, objcount,
 620                         ioo, npages, pp_rnb, local_nb, oti);
 621         if (rc != 0)
 622                 GOTO(out_bulk, rc);
 623
 624         /* NB Having prepped, we must commit... */
 625
 626         for (i = 0; i < npages; i++) {
 627                 rc = ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 628                                            pp_rnb[i].offset & (PAGE_SIZE - 1),
 629                                            pp_rnb[i].len);
 630                 if (rc != 0)
 631                         break;
 632         }
 633
 634         if (rc == 0) {
 635                 rc = ptlrpc_bulk_get(desc);
 636                 if (rc == 0) {
 637                         lwi = LWI_TIMEOUT(obd_timeout * HZ / 4,
 638                                           ost_bulk_timeout, desc);
 639                         rc = l_wait_event(desc->bd_waitq,
 640                                           ptlrpc_bulk_complete(desc), &lwi);
 641                         if (rc) {
 642                                 LASSERT(rc == -ETIMEDOUT);
 643                                 DEBUG_REQ(D_ERROR, req, "timeout on bulk GET");
 644                                 ptlrpc_abort_bulk(desc);
 645                         }
 646                 } else {
 647                         DEBUG_REQ(D_ERROR, req, "bulk GET failed: rc %d\n", rc);
 648                 }
 649                 comms_error = rc != 0;
 650         }
 651
 652         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 653         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 654
 655 #if CHECKSUM_BULK
 656         if (rc == 0 && (body->oa.o_valid & OBD_MD_FLCKSUM) != 0) {
 657                 static int cksum_counter;
 658                 obd_count client_cksum = body->oa.o_nlink;
 659                 obd_count cksum = ost_checksum_bulk(desc);
 660
 661                 portals_nid2str(req->rq_connection->c_peer.peer_ni->pni_number,
 662                                 req->rq_connection->c_peer.peer_nid, str);
 663                 if (client_cksum != cksum) {
 664                         CERROR("Bad checksum: client %x, server %x, client NID "
 665                                LPX64" (%s)\n", client_cksum, cksum,
 666                                req->rq_connection->c_peer.peer_nid, str);
 667                         cksum_counter = 1;
 668                         repbody->oa.o_nlink = cksum;
 669                 } else {
 670                         cksum_counter++;
 671                         if ((cksum_counter & (-cksum_counter)) == cksum_counter)
 672                                 CWARN("Checksum %u from "LPX64": %x OK\n",
 673                                       cksum_counter,
 674                                       req->rq_connection->c_peer.peer_nid,
 675                                       cksum);
 676                 }
 677         }
 678 #endif
 679         /* Must commit after prep above in all cases */
 680         rc2 = obd_commitrw(OBD_BRW_WRITE, req->rq_export, &repbody->oa,
 681                            objcount, ioo, npages, local_nb, oti);
 682
 683         if (rc == 0) {
 684                 /* set per-requested niobuf return codes */
 685                 for (i = j = 0; i < niocount; i++) {
 686                         int nob = remote_nb[i].len;
 687
 688                         rcs[i] = 0;
 689                         do {
 690                                 LASSERT(j < npages);
 691                                 if (local_nb[j].rc < 0)
 692                                         rcs[i] = local_nb[j].rc;
 693                                 nob -= pp_rnb[j].len;
 694                                 j++;
 695                         } while (nob > 0);
 696                         LASSERT(nob == 0);
 697                 }
 698                 LASSERT(j == npages);
 699         }
 700         if (rc == 0)
 701                 rc = rc2;
 702
 703  out_bulk:
 704         ptlrpc_free_bulk(desc);
 705  out_local:
 706         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 707  out_pp_rnb:
 708         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 709  out:
 710         if (rc == 0) {
 711                 oti_to_request(oti, req);
 712                 rc = ptlrpc_reply(req);
 713         } else if (!comms_error) {
 714                 /* Only reply if there was no comms problem with bulk */
 715                 req->rq_status = rc;
 716                 ptlrpc_error(req);
 717         } else {
 718                 if (req->rq_repmsg != NULL) {
 719                         /* reply out callback would free */
 720                         OBD_FREE (req->rq_repmsg, req->rq_replen);
 721                 }
 722                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 723                         CERROR("bulk IO comms error: "
 724                                "evicting %s@%s nid "LPX64" (%s)\n",
 725                                req->rq_export->exp_client_uuid.uuid,
 726                                req->rq_connection->c_remote_uuid.uuid,
 727                                req->rq_connection->c_peer.peer_nid,
 728                                portals_nid2str(req->rq_connection->c_peer.peer_ni->pni_number,
 729                                                req->rq_connection->c_peer.peer_nid,
 730                                                str));
 731                         ptlrpc_fail_export(req->rq_export);
 732                 } else {
 733                         CERROR("ignoring bulk IO comms error: "
 734                                "client reconnected %s@%s nid "LPX64" (%s)\n",
 735                                req->rq_export->exp_client_uuid.uuid,
 736                                req->rq_connection->c_remote_uuid.uuid,
 737                                req->rq_connection->c_peer.peer_nid,
 738                                portals_nid2str(req->rq_connection->c_peer.peer_ni->pni_number,
 739                                                req->rq_connection->c_peer.peer_nid,
 740                                                str));
 741                 }
 742         }
 743         RETURN(rc);
 744 }
 745
 746 static int ost_san_brw(struct ptlrpc_request *req, int cmd)
 747 {
 748         struct niobuf_remote *remote_nb, *res_nb, *pp_rnb;
 749         struct obd_ioobj *ioo;
 750         struct ost_body *body, *repbody;
 751         int rc, i, objcount, niocount, size[2] = {sizeof(*body)}, npages;
 752         int swab;
 753         ENTRY;
 754
 755         /* XXX not set to use latest protocol */
 756
 757         swab = lustre_msg_swabbed(req->rq_reqmsg);
 758         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 759         if (body == NULL) {
 760                 CERROR("Missing/short ost_body\n");
 761                 GOTO(out, rc = -EFAULT);
 762         }
 763
 764         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 765         if (ioo == NULL) {
 766                 CERROR("Missing/short ioobj\n");
 767                 GOTO(out, rc = -EFAULT);
 768         }
 769         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 770         niocount = ioo[0].ioo_bufcnt;
 771         for (i = 1; i < objcount; i++) {
 772                 if (swab)
 773                         lustre_swab_obd_ioobj (&ioo[i]);
 774                 niocount += ioo[i].ioo_bufcnt;
 775         }
 776
 777         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 778                                        lustre_swab_niobuf_remote);
 779         if (remote_nb == NULL) {
 780                 CERROR("Missing/short niobuf\n");
 781                 GOTO(out, rc = -EFAULT);
 782         }
 783         if (swab) {                             /* swab the remaining niobufs */
 784                 for (i = 1; i < niocount; i++)
 785                         lustre_swab_niobuf_remote (&remote_nb[i]);
 786         }
 787
 788         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 789         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 790         if (npages < 0)
 791                 GOTO (out, rc = npages);
 792
 793         size[1] = npages * sizeof(*pp_rnb);
 794         rc = lustre_pack_reply(req, 2, size, NULL);
 795         if (rc)
 796                 GOTO(out_pp_rnb, rc);
 797
 798         req->rq_status = obd_san_preprw(cmd, req->rq_export, &body->oa,
 799                                         objcount, ioo, npages, pp_rnb);
 800
 801         if (req->rq_status)
 802                 GOTO(out_pp_rnb, rc = 0);
 803
 804         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 805         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 806
 807         res_nb = lustre_msg_buf(req->rq_repmsg, 1, size[1]);
 808         memcpy(res_nb, remote_nb, size[1]);
 809         rc = 0;
 810 out_pp_rnb:
 811         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 812 out:
 813         if (rc) {
 814                 OBD_FREE(req->rq_repmsg, req->rq_replen);
 815                 req->rq_repmsg = NULL;
 816                 req->rq_status = rc;
 817                 ptlrpc_error(req);
 818         } else
 819                 ptlrpc_reply(req);
 820
 821         return rc;
 822 }
 823
 824
 825 static int ost_set_info(struct obd_export *exp, struct ptlrpc_request *req)
 826 {
 827         char *key;
 828         int keylen, rc = 0;
 829         ENTRY;
 830
 831         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 832         if (key == NULL) {
 833                 DEBUG_REQ(D_HA, req, "no set_info key");
 834                 RETURN(-EFAULT);
 835         }
 836         keylen = req->rq_reqmsg->buflens[0];
 837
 838         rc = lustre_pack_reply(req, 0, NULL, NULL);
 839         if (rc)
 840                 RETURN(rc);
 841
 842         rc = obd_set_info(exp, keylen, key, 0, NULL);
 843         req->rq_repmsg->status = 0;
 844         RETURN(rc);
 845 }
 846
 847 static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
 848 {
 849         char *key;
 850         int keylen, rc = 0, size = sizeof(obd_id);
 851         obd_id *reply;
 852         ENTRY;
 853
 854         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 855         if (key == NULL) {
 856                 DEBUG_REQ(D_HA, req, "no get_info key");
 857                 RETURN(-EFAULT);
 858         }
 859         keylen = req->rq_reqmsg->buflens[0];
 860
 861         if (keylen < strlen("last_id") || memcmp(key, "last_id", 7) != 0)
 862                 RETURN(-EPROTO);
 863
 864         rc = lustre_pack_reply(req, 1, &size, NULL);
 865         if (rc)
 866                 RETURN(rc);
 867
 868         reply = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply));
 869         rc = obd_get_info(exp, keylen, key, &size, reply);
 870         req->rq_repmsg->status = 0;
 871         RETURN(rc);
 872 }
 873
 874 static int ost_filter_recovery_request(struct ptlrpc_request *req,
 875                                        struct obd_device *obd, int *process)
 876 {
 877         switch (req->rq_reqmsg->opc) {
 878         case OST_CONNECT: /* This will never get here, but for completeness. */
 879         case OST_DISCONNECT:
 880                *process = 1;
 881                RETURN(0);
 882
 883         case OBD_PING:
 884         case OST_CREATE:
 885         case OST_DESTROY:
 886         case OST_PUNCH:
 887         case OST_SETATTR:
 888         case OST_SYNC:
 889         case OST_WRITE:
 890         case OBD_LOG_CANCEL:
 891         case LDLM_ENQUEUE:
 892                 *process = target_queue_recovery_request(req, obd);
 893                 RETURN(0);
 894
 895         default:
 896                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
 897                 *process = 0;
 898                 /* XXX what should we set rq_status to here? */
 899                 req->rq_status = -EAGAIN;
 900                 RETURN(ptlrpc_error(req));
 901         }
 902 }
 903
 904
 905
 906 static int ost_handle(struct ptlrpc_request *req)
 907 {
 908         struct obd_trans_info trans_info = { 0, };
 909         struct obd_trans_info *oti = &trans_info;
 910         int should_process, fail = OBD_FAIL_OST_ALL_REPLY_NET, rc = 0;
 911         struct obd_export *exp = NULL;
 912         ENTRY;
 913
 914         LASSERT(current->journal_info == NULL);
 915         /* XXX identical to MDS */
 916         if (req->rq_reqmsg->opc != OST_CONNECT) {
 917                 struct obd_device *obd;
 918                 int abort_recovery, recovering;
 919
 920                 exp = req->rq_export;
 921
 922                 if (exp == NULL) {
 923                         CDEBUG(D_HA, "operation %d on unconnected OST\n",
 924                                req->rq_reqmsg->opc);
 925                         req->rq_status = -ENOTCONN;
 926                         GOTO(out, rc = -ENOTCONN);
 927                 }
 928
 929                 obd = exp->exp_obd;
 930
 931                 /* Check for aborted recovery. */
 932                 spin_lock_bh(&obd->obd_processing_task_lock);
 933                 abort_recovery = obd->obd_abort_recovery;
 934                 recovering = obd->obd_recovering;
 935                 spin_unlock_bh(&obd->obd_processing_task_lock);
 936                 if (abort_recovery) {
 937                         target_abort_recovery(obd);
 938                 } else if (recovering) {
 939                         rc = ost_filter_recovery_request(req, obd,
 940                                                          &should_process);
 941                         if (rc || !should_process)
 942                                 RETURN(rc);
 943                 }
 944         }
 945
 946         oti_init(oti, req);
 947
 948         switch (req->rq_reqmsg->opc) {
 949         case OST_CONNECT:
 950                 CDEBUG(D_INODE, "connect\n");
 951                 OBD_FAIL_RETURN(OBD_FAIL_OST_CONNECT_NET, 0);
 952                 rc = target_handle_connect(req, ost_handle);
 953                 break;
 954         case OST_DISCONNECT:
 955                 CDEBUG(D_INODE, "disconnect\n");
 956                 OBD_FAIL_RETURN(OBD_FAIL_OST_DISCONNECT_NET, 0);
 957                 rc = target_handle_disconnect(req);
 958                 break;
 959         case OST_CREATE:
 960                 CDEBUG(D_INODE, "create\n");
 961                 OBD_FAIL_RETURN(OBD_FAIL_OST_CREATE_NET, 0);
 962                 rc = ost_create(exp, req, oti);
 963                 break;
 964         case OST_DESTROY:
 965                 CDEBUG(D_INODE, "destroy\n");
 966                 OBD_FAIL_RETURN(OBD_FAIL_OST_DESTROY_NET, 0);
 967                 rc = ost_destroy(exp, req, oti);
 968                 break;
 969         case OST_GETATTR:
 970                 CDEBUG(D_INODE, "getattr\n");
 971                 OBD_FAIL_RETURN(OBD_FAIL_OST_GETATTR_NET, 0);
 972                 rc = ost_getattr(exp, req);
 973                 break;
 974         case OST_SETATTR:
 975                 CDEBUG(D_INODE, "setattr\n");
 976                 OBD_FAIL_RETURN(OBD_FAIL_OST_SETATTR_NET, 0);
 977                 rc = ost_setattr(exp, req, oti);
 978                 break;
 979         case OST_WRITE:
 980                 CDEBUG(D_INODE, "write\n");
 981                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 982                 rc = ost_brw_write(req, oti);
 983                 LASSERT(current->journal_info == NULL);
 984                 /* ost_brw sends its own replies */
 985                 RETURN(rc);
 986         case OST_READ:
 987                 CDEBUG(D_INODE, "read\n");
 988                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 989                 rc = ost_brw_read(req);
 990                 LASSERT(current->journal_info == NULL);
 991                 /* ost_brw sends its own replies */
 992                 RETURN(rc);
 993         case OST_SAN_READ:
 994                 CDEBUG(D_INODE, "san read\n");
 995                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 996                 rc = ost_san_brw(req, OBD_BRW_READ);
 997                 /* ost_san_brw sends its own replies */
 998                 RETURN(rc);
 999         case OST_SAN_WRITE:
1000                 CDEBUG(D_INODE, "san write\n");
1001                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1002                 rc = ost_san_brw(req, OBD_BRW_WRITE);
1003                 /* ost_san_brw sends its own replies */
1004                 RETURN(rc);
1005         case OST_PUNCH:
1006                 CDEBUG(D_INODE, "punch\n");
1007                 OBD_FAIL_RETURN(OBD_FAIL_OST_PUNCH_NET, 0);
1008                 rc = ost_punch(exp, req, oti);
1009                 break;
1010         case OST_STATFS:
1011                 CDEBUG(D_INODE, "statfs\n");
1012                 OBD_FAIL_RETURN(OBD_FAIL_OST_STATFS_NET, 0);
1013                 rc = ost_statfs(req);
1014                 break;
1015         case OST_SYNC:
1016                 CDEBUG(D_INODE, "sync\n");
1017                 OBD_FAIL_RETURN(OBD_FAIL_OST_SYNC_NET, 0);
1018                 rc = ost_sync(exp, req);
1019                 break;
1020         case OST_SET_INFO:
1021                 DEBUG_REQ(D_INODE, req, "set_info");
1022                 rc = ost_set_info(exp, req);
1023                 break;
1024         case OST_GET_INFO:
1025                 DEBUG_REQ(D_INODE, req, "get_info");
1026                 rc = ost_get_info(exp, req);
1027                 break;
1028         case OBD_PING:
1029                 DEBUG_REQ(D_INODE, req, "ping");
1030                 rc = target_handle_ping(req);
1031                 break;
1032 #ifdef ENABLE_ORPHANS
1033         /* FIXME - just reply status */
1034         case LLOG_ORIGIN_CONNECT:
1035                 DEBUG_REQ(D_INODE, req, "log connect\n");
1036                 rc = llog_handle_connect(req);
1037                 req->rq_status = rc;
1038                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1039                 if (rc)
1040                         RETURN(rc);
1041                 RETURN(ptlrpc_reply(req));
1042                 //break;
1043         case OBD_LOG_CANCEL:
1044                 CDEBUG(D_INODE, "log cancel\n");
1045                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOG_CANCEL_NET, 0);
1046                 rc = llog_origin_handle_cancel(req);
1047                 req->rq_status = rc;
1048                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1049                 if (rc)
1050                         RETURN(rc);
1051                 RETURN(ptlrpc_reply(req));
1052                 //break;
1053 #endif
1054         case LDLM_ENQUEUE:
1055                 CDEBUG(D_INODE, "enqueue\n");
1056                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
1057                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1058                                          ldlm_server_blocking_ast);
1059                 fail = OBD_FAIL_OST_LDLM_REPLY_NET;
1060                 break;
1061         case LDLM_CONVERT:
1062                 CDEBUG(D_INODE, "convert\n");
1063                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
1064                 rc = ldlm_handle_convert(req);
1065                 break;
1066         case LDLM_CANCEL:
1067                 CDEBUG(D_INODE, "cancel\n");
1068                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CANCEL, 0);
1069                 rc = ldlm_handle_cancel(req);
1070                 break;
1071         case LDLM_BL_CALLBACK:
1072         case LDLM_CP_CALLBACK:
1073                 CDEBUG(D_INODE, "callback\n");
1074                 CERROR("callbacks should not happen on OST\n");
1075                 /* fall through */
1076         default:
1077                 CERROR("Unexpected opcode %d\n", req->rq_reqmsg->opc);
1078                 req->rq_status = -ENOTSUPP;
1079                 rc = ptlrpc_error(req);
1080                 RETURN(rc);
1081         }
1082
1083         LASSERT(current->journal_info == NULL);
1084
1085         EXIT;
1086         /* If we're DISCONNECTing, the export_data is already freed */
1087         if (!rc && req->rq_reqmsg->opc != OST_DISCONNECT) {
1088                 struct obd_device *obd  = req->rq_export->exp_obd;
1089                 if (!obd->obd_no_transno) {
1090                         req->rq_repmsg->last_committed =
1091                                 obd->obd_last_committed;
1092                 } else {
1093                         DEBUG_REQ(D_IOCTL, req,
1094                                   "not sending last_committed update");
1095                 }
1096                 CDEBUG(D_INFO, "last_committed "LPU64", xid "LPX64"\n",
1097                        obd->obd_last_committed, req->rq_xid);
1098         }
1099
1100 out:
1101         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LAST_REPLAY) {
1102                 struct obd_device *obd = req->rq_export->exp_obd;
1103
1104                 if (obd && obd->obd_recovering) {
1105                         DEBUG_REQ(D_HA, req, "LAST_REPLAY, queuing reply");
1106                         return target_queue_final_reply(req, rc);
1107                 }
1108                 /* Lost a race with recovery; let the error path DTRT. */
1109                 rc = req->rq_status = -ENOTCONN;
1110         }
1111
1112         if (!rc)
1113                 oti_to_request(oti, req);
1114
1115         target_send_reply(req, rc, fail);
1116         return 0;
1117 }
1118
1119 static int ost_setup(struct obd_device *obddev, obd_count len, void *buf)
1120 {
1121         struct ost_obd *ost = &obddev->u.ost;
1122         int rc;
1123         ENTRY;
1124
1125         /* Get rid of unneeded supplementary groups */
1126         current->ngroups = 0;
1127         memset(current->groups, 0, sizeof(current->groups));
1128
1129         rc = llog_start_commit_thread();
1130         if (rc < 0)
1131                 RETURN(rc);
1132
1133         ost->ost_service = ptlrpc_init_svc(OST_NEVENTS, OST_NBUFS,
1134                                            OST_BUFSIZE, OST_MAXREQSIZE,
1135                                            OST_REQUEST_PORTAL, OSC_REPLY_PORTAL,
1136                                            ost_handle, "ost",
1137                                            obddev->obd_proc_entry);
1138         if (ost->ost_service == NULL) {
1139                 CERROR("failed to start service\n");
1140                 RETURN(-ENOMEM);
1141         }
1142
1143         rc = ptlrpc_start_n_threads(obddev, ost->ost_service, OST_NUM_THREADS,
1144                                  "ll_ost");
1145         if (rc)
1146                 GOTO(out, rc = -EINVAL);
1147
1148         ost->ost_create_service =
1149                 ptlrpc_init_svc(OST_NEVENTS, OST_NBUFS, OST_BUFSIZE,
1150                                 OST_MAXREQSIZE, OST_CREATE_PORTAL,
1151                                 OSC_REPLY_PORTAL, ost_handle, "ost_create",
1152                                 obddev->obd_proc_entry);
1153         if (ost->ost_create_service == NULL) {
1154                 CERROR("failed to start OST create service\n");
1155                 GOTO(out, rc = -ENOMEM);
1156         }
1157
1158         rc = ptlrpc_start_n_threads(obddev, ost->ost_create_service, 1,
1159                                     "ll_ost_create");
1160         if (rc)
1161                 GOTO(out_create, rc = -EINVAL);
1162
1163         RETURN(0);
1164
1165 out_create:
1166         ptlrpc_unregister_service(ost->ost_create_service);
1167 out:
1168         ptlrpc_unregister_service(ost->ost_service);
1169         RETURN(rc);
1170 }
1171
1172 static int ost_cleanup(struct obd_device *obddev, int flags)
1173 {
1174         struct ost_obd *ost = &obddev->u.ost;
1175         int err = 0;
1176         ENTRY;
1177
1178         if (obddev->obd_recovering)
1179                 target_cancel_recovery_timer(obddev);
1180
1181         ptlrpc_stop_all_threads(ost->ost_service);
1182         ptlrpc_unregister_service(ost->ost_service);
1183
1184         ptlrpc_stop_all_threads(ost->ost_create_service);
1185         ptlrpc_unregister_service(ost->ost_create_service);
1186
1187         RETURN(err);
1188 }
1189
1190 int ost_attach(struct obd_device *dev, obd_count len, void *data)
1191 {
1192         struct lprocfs_static_vars lvars;
1193
1194         lprocfs_init_vars(ost,&lvars);
1195         return lprocfs_obd_attach(dev, lvars.obd_vars);
1196 }
1197
1198 int ost_detach(struct obd_device *dev)
1199 {
1200         return lprocfs_obd_detach(dev);
1201 }
1202
1203 /* use obd ops to offer management infrastructure */
1204 static struct obd_ops ost_obd_ops = {
1205         o_owner:        THIS_MODULE,
1206         o_attach:       ost_attach,
1207         o_detach:       ost_detach,
1208         o_setup:        ost_setup,
1209         o_cleanup:      ost_cleanup,
1210 };
1211
1212 static int __init ost_init(void)
1213 {
1214         struct lprocfs_static_vars lvars;
1215         ENTRY;
1216
1217         lprocfs_init_vars(ost,&lvars);
1218         RETURN(class_register_type(&ost_obd_ops, lvars.module_vars,
1219                                    LUSTRE_OST_NAME));
1220 }
1221
1222 static void /*__exit*/ ost_exit(void)
1223 {
1224         class_unregister_type(LUSTRE_OST_NAME);
1225 }
1226
1227 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1228 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
1229 MODULE_LICENSE("GPL");
1230
1231 module_init(ost_init);
1232 module_exit(ost_exit);