lustre/ost/ost_handler.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
   5  *   Author: Peter J. Braam <braam@clusterfs.com>
   6  *   Author: Phil Schwan <phil@clusterfs.com>
   7  *
   8  *   This file is part of Lustre, http://www.lustre.org.
   9  *
  10  *   Lustre is free software; you can redistribute it and/or
  11  *   modify it under the terms of version 2 of the GNU General Public
  12  *   License as published by the Free Software Foundation.
  13  *
  14  *   Lustre is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with Lustre; if not, write to the Free Software
  21  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  *  Storage Target Handling functions
  24  *  Lustre Object Server Module (OST)
  25  *
  26  *  This server is single threaded at present (but can easily be multi
  27  *  threaded). For testing and management it is treated as an
  28  *  obd_device, although it does not export a full OBD method table
  29  *  (the requests are coming in over the wire, so object target
  30  *  modules do not have a full method table.)
  31  */
  32
  33 #ifndef EXPORT_SYMTAB
  34 # define EXPORT_SYMTAB
  35 #endif
  36 #define DEBUG_SUBSYSTEM S_OST
  37
  38 #include <linux/module.h>
  39 #include <linux/obd_ost.h>
  40 #include <linux/lustre_net.h>
  41 #include <linux/lustre_dlm.h>
  42 #include <linux/lustre_export.h>
  43 #include <linux/lustre_debug.h>
  44 #include <linux/init.h>
  45 #include <linux/lprocfs_status.h>
  46 #include <linux/lustre_commit_confd.h>
  47 #include <portals/list.h>
  48 #include "ost_internal.h"
  49
  50 void oti_init(struct obd_trans_info *oti, struct ptlrpc_request *req)
  51 {
  52         if (oti == NULL)
  53                 return;
  54         memset(oti, 0, sizeof *oti);
  55
  56         if (req->rq_repmsg && req->rq_reqmsg != 0)
  57                 oti->oti_transno = req->rq_repmsg->transno;
  58 }
  59
  60 void oti_to_request(struct obd_trans_info *oti, struct ptlrpc_request *req)
  61 {
  62         struct oti_req_ack_lock *ack_lock;
  63         int i;
  64
  65         if (oti == NULL)
  66                 return;
  67
  68         if (req->rq_repmsg)
  69                 req->rq_repmsg->transno = oti->oti_transno;
  70
  71         /* XXX 4 == entries in oti_ack_locks??? */
  72         for (ack_lock = oti->oti_ack_locks, i = 0; i < 4; i++, ack_lock++) {
  73                 if (!ack_lock->mode)
  74                         break;
  75                 /* XXX not even calling target_send_reply in some cases... */
  76                 ptlrpc_save_lock (req, &ack_lock->lock, ack_lock->mode);
  77         }
  78 }
  79
  80 static int ost_destroy(struct obd_export *exp, struct ptlrpc_request *req,
  81                        struct obd_trans_info *oti)
  82 {
  83         struct ost_body *body, *repbody;
  84         int rc, size = sizeof(*body);
  85         ENTRY;
  86
  87         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
  88         if (body == NULL)
  89                 RETURN(-EFAULT);
  90
  91         rc = lustre_pack_reply(req, 1, &size, NULL);
  92         if (rc)
  93                 RETURN(rc);
  94
  95         if (body->oa.o_valid & OBD_MD_FLCOOKIE)
  96                 oti->oti_logcookies = obdo_logcookie(&body->oa);
  97         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
  98         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
  99         req->rq_status = obd_destroy(exp, &body->oa, NULL, oti);
 100         RETURN(0);
 101 }
 102
 103 static int ost_getattr(struct obd_export *exp, struct ptlrpc_request *req)
 104 {
 105         struct ost_body *body, *repbody;
 106         int rc, size = sizeof(*body);
 107         ENTRY;
 108
 109         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 110         if (body == NULL)
 111                 RETURN(-EFAULT);
 112
 113         rc = lustre_pack_reply(req, 1, &size, NULL);
 114         if (rc)
 115                 RETURN(rc);
 116
 117         repbody = lustre_msg_buf (req->rq_repmsg, 0, sizeof(*repbody));
 118         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 119         req->rq_status = obd_getattr(exp, &repbody->oa, NULL);
 120         RETURN(0);
 121 }
 122
 123 static int ost_statfs(struct ptlrpc_request *req)
 124 {
 125         struct obd_statfs *osfs;
 126         int rc, size = sizeof(*osfs);
 127         ENTRY;
 128
 129         rc = lustre_pack_reply(req, 1, &size, NULL);
 130         if (rc)
 131                 RETURN(rc);
 132
 133         osfs = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*osfs));
 134
 135         req->rq_status = obd_statfs(req->rq_export->exp_obd, osfs, jiffies-HZ);
 136         if (req->rq_status != 0)
 137                 CERROR("ost: statfs failed: rc %d\n", req->rq_status);
 138
 139         RETURN(0);
 140 }
 141
 142 static int ost_create(struct obd_export *exp, struct ptlrpc_request *req,
 143                       struct obd_trans_info *oti)
 144 {
 145         struct ost_body *body, *repbody;
 146         int rc, size = sizeof(*repbody);
 147         ENTRY;
 148
 149         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 150         if (body == NULL)
 151                 RETURN(-EFAULT);
 152
 153         rc = lustre_pack_reply(req, 1, &size, NULL);
 154         if (rc)
 155                 RETURN(rc);
 156
 157         repbody = lustre_msg_buf (req->rq_repmsg, 0, sizeof(*repbody));
 158         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 159         oti->oti_logcookies = obdo_logcookie(&repbody->oa);
 160         req->rq_status = obd_create(exp, &repbody->oa, NULL, oti);
 161         //obd_log_cancel(conn, NULL, 1, oti->oti_logcookies, 0);
 162         RETURN(0);
 163 }
 164
 165 static int ost_punch(struct obd_export *exp, struct ptlrpc_request *req,
 166                      struct obd_trans_info *oti)
 167 {
 168         struct ost_body *body, *repbody;
 169         int rc, size = sizeof(*repbody);
 170         ENTRY;
 171
 172         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 173         if (body == NULL)
 174                 RETURN(-EFAULT);
 175
 176         if ((body->oa.o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
 177             (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
 178                 RETURN(-EINVAL);
 179
 180         rc = lustre_pack_reply(req, 1, &size, NULL);
 181         if (rc)
 182                 RETURN(rc);
 183
 184         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 185         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 186         req->rq_status = obd_punch(exp, &repbody->oa, NULL, repbody->oa.o_size,
 187                                    repbody->oa.o_blocks, oti);
 188         RETURN(0);
 189 }
 190
 191 static int ost_sync(struct obd_export *exp, struct ptlrpc_request *req)
 192 {
 193         struct ost_body *body, *repbody;
 194         int rc, size = sizeof(*repbody);
 195         ENTRY;
 196
 197         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 198         if (body == NULL)
 199                 RETURN(-EFAULT);
 200
 201         rc = lustre_pack_reply(req, 1, &size, NULL);
 202         if (rc)
 203                 RETURN(rc);
 204
 205         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 206         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 207         req->rq_status = obd_sync(exp, &repbody->oa, NULL, repbody->oa.o_size,
 208                                   repbody->oa.o_blocks);
 209         RETURN(0);
 210 }
 211
 212 static int ost_setattr(struct obd_export *exp, struct ptlrpc_request *req,
 213                        struct obd_trans_info *oti)
 214 {
 215         struct ost_body *body, *repbody;
 216         int rc, size = sizeof(*repbody);
 217         ENTRY;
 218
 219         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 220         if (body == NULL)
 221                 RETURN(-EFAULT);
 222
 223         rc = lustre_pack_reply(req, 1, &size, NULL);
 224         if (rc)
 225                 RETURN(rc);
 226
 227         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 228         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 229
 230         req->rq_status = obd_setattr(exp, &repbody->oa, NULL, oti);
 231         RETURN(0);
 232 }
 233
 234 static int ost_bulk_timeout(void *data)
 235 {
 236         ENTRY;
 237         /* We don't fail the connection here, because having the export
 238          * killed makes the (vital) call to commitrw very sad.
 239          */
 240         RETURN(1);
 241 }
 242
 243 static int get_per_page_niobufs(struct obd_ioobj *ioo, int nioo,
 244                                 struct niobuf_remote *rnb, int nrnb,
 245                                 struct niobuf_remote **pp_rnbp)
 246 {
 247         /* Copy a remote niobuf, splitting it into page-sized chunks
 248          * and setting ioo[i].ioo_bufcnt accordingly */
 249         struct niobuf_remote *pp_rnb;
 250         int   i;
 251         int   j;
 252         int   page;
 253         int   rnbidx = 0;
 254         int   npages = 0;
 255
 256         /* first count and check the number of pages required */
 257         for (i = 0; i < nioo; i++)
 258                 for (j = 0; j < ioo->ioo_bufcnt; j++, rnbidx++) {
 259                         obd_off offset = rnb[rnbidx].offset;
 260                         obd_off p0 = offset >> PAGE_SHIFT;
 261                         obd_off pn = (offset + rnb[rnbidx].len - 1)>>PAGE_SHIFT;
 262
 263                         LASSERT(rnbidx < nrnb);
 264
 265                         npages += (pn + 1 - p0);
 266
 267                         if (rnb[rnbidx].len == 0) {
 268                                 CERROR("zero len BRW: obj %d objid "LPX64
 269                                        " buf %u\n", i, ioo[i].ioo_id, j);
 270                                 return -EINVAL;
 271                         }
 272                         if (j > 0 &&
 273                             rnb[rnbidx].offset <= rnb[rnbidx-1].offset) {
 274                                 CERROR("unordered BRW: obj %d objid "LPX64
 275                                        " buf %u offset "LPX64" <= "LPX64"\n",
 276                                        i, ioo[i].ioo_id, j, rnb[rnbidx].offset,
 277                                        rnb[rnbidx].offset);
 278                                 return -EINVAL;
 279                         }
 280                 }
 281
 282         LASSERT(rnbidx == nrnb);
 283
 284         if (npages == nrnb) {       /* all niobufs are for single pages */
 285                 *pp_rnbp = rnb;
 286                 return npages;
 287         }
 288
 289         OBD_ALLOC(pp_rnb, sizeof(*pp_rnb) * npages);
 290         if (pp_rnb == NULL)
 291                 return -ENOMEM;
 292
 293         /* now do the actual split */
 294         page = rnbidx = 0;
 295         for (i = 0; i < nioo; i++) {
 296                 int  obj_pages = 0;
 297
 298                 for (j = 0; j < ioo[i].ioo_bufcnt; j++, rnbidx++) {
 299                         obd_off off = rnb[rnbidx].offset;
 300                         int     nob = rnb[rnbidx].len;
 301
 302                         LASSERT(rnbidx < nrnb);
 303                         do {
 304                                 obd_off  poff = off & (PAGE_SIZE - 1);
 305                                 int      pnob = (poff + nob > PAGE_SIZE) ?
 306                                                 PAGE_SIZE - poff : nob;
 307
 308                                 LASSERT(page < npages);
 309                                 pp_rnb[page].len = pnob;
 310                                 pp_rnb[page].offset = off;
 311                                 pp_rnb[page].flags = rnb[rnbidx].flags;
 312
 313                                 CDEBUG(0, "   obj %d id "LPX64
 314                                        "page %d(%d) "LPX64" for %d, flg %x\n",
 315                                        i, ioo[i].ioo_id, obj_pages, page,
 316                                        pp_rnb[page].offset, pp_rnb[page].len,
 317                                        pp_rnb[page].flags);
 318                                 page++;
 319                                 obj_pages++;
 320
 321                                 off += pnob;
 322                                 nob -= pnob;
 323                         } while (nob > 0);
 324                         LASSERT(nob == 0);
 325                 }
 326                 ioo[i].ioo_bufcnt = obj_pages;
 327         }
 328         LASSERT(page == npages);
 329
 330         *pp_rnbp = pp_rnb;
 331         return npages;
 332 }
 333
 334 static void free_per_page_niobufs (int npages, struct niobuf_remote *pp_rnb,
 335                                    struct niobuf_remote *rnb)
 336 {
 337         if (pp_rnb == rnb)                      /* didn't allocate above */
 338                 return;
 339
 340         OBD_FREE(pp_rnb, sizeof(*pp_rnb) * npages);
 341 }
 342
 343 #if CHECKSUM_BULK
 344 obd_count ost_checksum_bulk(struct ptlrpc_bulk_desc *desc)
 345 {
 346         obd_count cksum = 0;
 347         int i;
 348
 349         for (i = 0; i < desc->bd_iov_count; i++) {
 350                 struct page *page = desc->bd_iov[i].kiov_page;
 351                 char *ptr = kmap(page);
 352                 int psum, off = desc->bd_iov[i].kiov_offset & ~PAGE_MASK;
 353                 int count = desc->bd_iov[i].kiov_len;
 354
 355                 while (count > 0) {
 356                         ost_checksum(&cksum, &psum, ptr + off,
 357                                      count > CHECKSUM_CHUNK ?
 358                                      CHECKSUM_CHUNK : count);
 359                         LL_CDEBUG_PAGE(D_PAGE, page, "off %d checksum %x\n",
 360                                        off, psum);
 361                         off += CHECKSUM_CHUNK;
 362                         count -= CHECKSUM_CHUNK;
 363                 }
 364                 kunmap(page);
 365         }
 366
 367         return cksum;
 368 }
 369 #endif
 370
 371 static int ost_brw_read(struct ptlrpc_request *req, struct obd_trans_info *oti)
 372 {
 373         struct ptlrpc_bulk_desc *desc;
 374         struct niobuf_remote    *remote_nb;
 375         struct niobuf_remote    *pp_rnb;
 376         struct niobuf_local     *local_nb;
 377         struct obd_ioobj        *ioo;
 378         struct ost_body         *body, *repbody;
 379         struct l_wait_info       lwi;
 380         int                      size[1] = { sizeof(*body) };
 381         int                      comms_error = 0;
 382         int                      niocount;
 383         int                      npages;
 384         int                      nob = 0;
 385         int                      rc;
 386         int                      i;
 387         ENTRY;
 388
 389         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
 390                 GOTO(out, rc = -EIO);
 391
 392         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 393                          (obd_timeout + 1) / 4);
 394
 395         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 396         if (body == NULL) {
 397                 CERROR("Missing/short ost_body\n");
 398                 GOTO(out, rc = -EFAULT);
 399         }
 400
 401         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 402         if (ioo == NULL) {
 403                 CERROR("Missing/short ioobj\n");
 404                 GOTO(out, rc = -EFAULT);
 405         }
 406
 407         niocount = ioo->ioo_bufcnt;
 408         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 409                                        lustre_swab_niobuf_remote);
 410         if (remote_nb == NULL) {
 411                 CERROR("Missing/short niobuf\n");
 412                 GOTO(out, rc = -EFAULT);
 413         }
 414         if (lustre_msg_swabbed(req->rq_reqmsg)) { /* swab remaining niobufs */
 415                 for (i = 1; i < niocount; i++)
 416                         lustre_swab_niobuf_remote (&remote_nb[i]);
 417         }
 418
 419         rc = lustre_pack_reply(req, 1, size, NULL);
 420         if (rc)
 421                 GOTO(out, rc);
 422
 423         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 424         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 425         npages = get_per_page_niobufs(ioo, 1, remote_nb, niocount, &pp_rnb);
 426         if (npages < 0)
 427                 GOTO(out, rc = npages);
 428
 429         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 430         if (local_nb == NULL)
 431                 GOTO(out_pp_rnb, rc = -ENOMEM);
 432
 433         desc = ptlrpc_prep_bulk_exp (req, npages,
 434                                      BULK_PUT_SOURCE, OST_BULK_PORTAL);
 435         if (desc == NULL)
 436                 GOTO(out_local, rc = -ENOMEM);
 437
 438         rc = obd_preprw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 439                         ioo, npages, pp_rnb, local_nb, oti);
 440         if (rc != 0)
 441                 GOTO(out_bulk, rc);
 442
 443         /* We're finishing using body->oa as an input variable */
 444         body->oa.o_valid = 0;
 445
 446         nob = 0;
 447         for (i = 0; i < npages; i++) {
 448                 int page_rc = local_nb[i].rc;
 449
 450                 if (page_rc < 0) {              /* error */
 451                         rc = page_rc;
 452                         break;
 453                 }
 454
 455                 LASSERT(page_rc <= pp_rnb[i].len);
 456                 nob += page_rc;
 457                 if (page_rc != 0) {             /* some data! */
 458                         LASSERT (local_nb[i].page != NULL);
 459                         ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 460                                               pp_rnb[i].offset & (PAGE_SIZE-1),
 461                                               page_rc);
 462                 }
 463
 464                 if (page_rc != pp_rnb[i].len) { /* short read */
 465                         /* All subsequent pages should be 0 */
 466                         while(++i < npages)
 467                                 LASSERT(local_nb[i].rc == 0);
 468                         break;
 469                 }
 470         }
 471
 472         if (rc == 0) {
 473                 rc = ptlrpc_start_bulk_transfer(desc);
 474                 if (rc == 0) {
 475                         lwi = LWI_TIMEOUT(obd_timeout * HZ / 4,
 476                                           ost_bulk_timeout, desc);
 477                         rc = l_wait_event(desc->bd_waitq,
 478                                           !ptlrpc_bulk_active(desc), &lwi);
 479                         LASSERT(rc == 0 || rc == -ETIMEDOUT);
 480                         if (rc == -ETIMEDOUT) {
 481                                 DEBUG_REQ(D_ERROR, req, "timeout on bulk PUT");
 482                                 ptlrpc_abort_bulk(desc);
 483                         } else if (!desc->bd_success ||
 484                                    desc->bd_nob_transferred != desc->bd_nob) {
 485                                 DEBUG_REQ(D_ERROR, req, "%s bulk PUT %d(%d)",
 486                                           desc->bd_success ?
 487                                           "truncated" : "network error on",
 488                                           desc->bd_nob_transferred,
 489                                           desc->bd_nob);
 490                                 /* XXX should this be a different errno? */
 491                                 rc = -ETIMEDOUT;
 492                         }
 493                 } else {
 494                         DEBUG_REQ(D_ERROR, req, "bulk PUT failed: rc %d\n", rc);
 495                 }
 496                 comms_error = rc != 0;
 497         }
 498
 499         /* Must commit after prep above in all cases */
 500         rc = obd_commitrw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 501                           ioo, npages, local_nb, oti, rc);
 502
 503         if (rc == 0) {
 504                 repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 505                 memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 506
 507 #if CHECKSUM_BULK
 508                 repbody->oa.o_cksum = ost_checksum_bulk(desc);
 509                 repbody->oa.o_valid |= OBD_MD_FLCKSUM;
 510 #endif
 511         }
 512
 513  out_bulk:
 514         ptlrpc_free_bulk(desc);
 515  out_local:
 516         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 517  out_pp_rnb:
 518         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 519  out:
 520         LASSERT(rc <= 0);
 521         if (rc == 0) {
 522                 req->rq_status = nob;
 523                 target_committed_to_req(req);
 524                 ptlrpc_reply(req);
 525         } else if (!comms_error) {
 526                 /* only reply if comms OK */
 527                 target_committed_to_req(req);
 528                 req->rq_status = rc;
 529                 ptlrpc_error(req);
 530         } else {
 531                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 532                         CERROR("bulk IO comms error: "
 533                                "evicting %s@%s id %s\n",
 534                                req->rq_export->exp_client_uuid.uuid,
 535                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 536                                req->rq_peerstr);
 537                         ptlrpc_fail_export(req->rq_export);
 538                 } else {
 539                         CERROR("ignoring bulk IO comms error: "
 540                                "client reconnected %s@%s id %s\n",
 541                                req->rq_export->exp_client_uuid.uuid,
 542                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 543                                req->rq_peerstr);
 544                 }
 545         }
 546
 547         RETURN(rc);
 548 }
 549
 550 static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
 551 {
 552         struct ptlrpc_bulk_desc *desc;
 553         struct niobuf_remote    *remote_nb;
 554         struct niobuf_remote    *pp_rnb;
 555         struct niobuf_local     *local_nb;
 556         struct obd_ioobj        *ioo;
 557         struct ost_body         *body, *repbody;
 558         struct l_wait_info       lwi;
 559         __u32                   *rcs;
 560         int                      size[2] = { sizeof(*body) };
 561         int                      objcount, niocount, npages;
 562         int                      comms_error = 0;
 563         int                      rc, swab, i, j;
 564         ENTRY;
 565
 566         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
 567                 GOTO(out, rc = -EIO);
 568
 569         /* pause before transaction has been started */
 570         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 571                          (obd_timeout + 1) / 4);
 572
 573         swab = lustre_msg_swabbed(req->rq_reqmsg);
 574         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 575         if (body == NULL) {
 576                 CERROR("Missing/short ost_body\n");
 577                 GOTO(out, rc = -EFAULT);
 578         }
 579
 580         LASSERT_REQSWAB(req, 1);
 581         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 582         if (objcount == 0) {
 583                 CERROR("Missing/short ioobj\n");
 584                 GOTO(out, rc = -EFAULT);
 585         }
 586         ioo = lustre_msg_buf (req->rq_reqmsg, 1, objcount * sizeof(*ioo));
 587         LASSERT (ioo != NULL);
 588         for (niocount = i = 0; i < objcount; i++) {
 589                 if (swab)
 590                         lustre_swab_obd_ioobj (&ioo[i]);
 591                 if (ioo[i].ioo_bufcnt == 0) {
 592                         CERROR("ioo[%d] has zero bufcnt\n", i);
 593                         GOTO(out, rc = -EFAULT);
 594                 }
 595                 niocount += ioo[i].ioo_bufcnt;
 596         }
 597
 598         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 599                                        lustre_swab_niobuf_remote);
 600         if (remote_nb == NULL) {
 601                 CERROR("Missing/short niobuf\n");
 602                 GOTO(out, rc = -EFAULT);
 603         }
 604         if (swab) {                             /* swab the remaining niobufs */
 605                 for (i = 1; i < niocount; i++)
 606                         lustre_swab_niobuf_remote (&remote_nb[i]);
 607         }
 608
 609         size[1] = niocount * sizeof(*rcs);
 610         rc = lustre_pack_reply(req, 2, size, NULL);
 611         if (rc != 0)
 612                 GOTO(out, rc);
 613         rcs = lustre_msg_buf(req->rq_repmsg, 1, niocount * sizeof(*rcs));
 614
 615         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 616         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 617         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 618         if (npages < 0)
 619                 GOTO(out, rc = npages);
 620
 621         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 622         if (local_nb == NULL)
 623                 GOTO(out_pp_rnb, rc = -ENOMEM);
 624
 625         desc = ptlrpc_prep_bulk_exp (req, npages,
 626                                      BULK_GET_SINK, OST_BULK_PORTAL);
 627         if (desc == NULL)
 628                 GOTO(out_local, rc = -ENOMEM);
 629
 630         rc = obd_preprw(OBD_BRW_WRITE, req->rq_export, &body->oa, objcount,
 631                         ioo, npages, pp_rnb, local_nb, oti);
 632         if (rc != 0)
 633                 GOTO(out_bulk, rc);
 634
 635         /* NB Having prepped, we must commit... */
 636
 637         for (i = 0; i < npages; i++)
 638                 ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 639                                       pp_rnb[i].offset & (PAGE_SIZE - 1),
 640                                       pp_rnb[i].len);
 641
 642         rc = ptlrpc_start_bulk_transfer (desc);
 643         if (rc == 0) {
 644                 lwi = LWI_TIMEOUT(obd_timeout * HZ / 4,
 645                                   ost_bulk_timeout, desc);
 646                 rc = l_wait_event(desc->bd_waitq, !ptlrpc_bulk_active(desc),
 647                                   &lwi);
 648                 LASSERT(rc == 0 || rc == -ETIMEDOUT);
 649                 if (rc == -ETIMEDOUT) {
 650                         DEBUG_REQ(D_ERROR, req, "timeout on bulk GET");
 651                         ptlrpc_abort_bulk(desc);
 652                 } else if (!desc->bd_success ||
 653                            desc->bd_nob_transferred != desc->bd_nob) {
 654                         DEBUG_REQ(D_ERROR, req, "%s bulk GET %d(%d)",
 655                                   desc->bd_success ?
 656                                   "truncated" : "network error on",
 657                                   desc->bd_nob_transferred, desc->bd_nob);
 658                         /* XXX should this be a different errno? */
 659                         rc = -ETIMEDOUT;
 660                 }
 661         } else {
 662                 DEBUG_REQ(D_ERROR, req, "ptlrpc_bulk_get failed: rc %d\n", rc);
 663         }
 664         comms_error = rc != 0;
 665
 666         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 667         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 668
 669 #if CHECKSUM_BULK
 670         if (rc == 0 && (body->oa.o_valid & OBD_MD_FLCKSUM) != 0) {
 671                 static int cksum_counter;
 672                 obd_count client_cksum = body->oa.o_cksum;
 673                 obd_count cksum = ost_checksum_bulk(desc);
 674
 675                 if (client_cksum != cksum) {
 676                         CERROR("Bad checksum: client %x, server %x id %s\n",
 677                                client_cksum, cksum,
 678                                req->rq_peerstr);
 679                         cksum_counter = 1;
 680                         repbody->oa.o_cksum = cksum;
 681                 } else {
 682                         cksum_counter++;
 683                         if ((cksum_counter & (-cksum_counter)) == cksum_counter)
 684                                 CWARN("Checksum %u from %s: %x OK\n",
 685                                       cksum_counter,
 686                                       req->rq_peerstr,
 687                                       cksum);
 688                 }
 689         }
 690 #endif
 691         /* Must commit after prep above in all cases */
 692         rc = obd_commitrw(OBD_BRW_WRITE, req->rq_export, &repbody->oa,
 693                            objcount, ioo, npages, local_nb, oti, rc);
 694
 695         if (rc == 0) {
 696                 /* set per-requested niobuf return codes */
 697                 for (i = j = 0; i < niocount; i++) {
 698                         int nob = remote_nb[i].len;
 699
 700                         rcs[i] = 0;
 701                         do {
 702                                 LASSERT(j < npages);
 703                                 if (local_nb[j].rc < 0)
 704                                         rcs[i] = local_nb[j].rc;
 705                                 nob -= pp_rnb[j].len;
 706                                 j++;
 707                         } while (nob > 0);
 708                         LASSERT(nob == 0);
 709                 }
 710                 LASSERT(j == npages);
 711         }
 712
 713  out_bulk:
 714         ptlrpc_free_bulk(desc);
 715  out_local:
 716         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 717  out_pp_rnb:
 718         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 719  out:
 720         if (rc == 0) {
 721                 oti_to_request(oti, req);
 722                 target_committed_to_req(req);
 723                 rc = ptlrpc_reply(req);
 724         } else if (!comms_error) {
 725                 /* Only reply if there was no comms problem with bulk */
 726                 target_committed_to_req(req);
 727                 req->rq_status = rc;
 728                 ptlrpc_error(req);
 729         } else {
 730                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 731                         CERROR("%s: bulk IO comm error evicting %s@%s id %s\n",
 732                                req->rq_export->exp_obd->obd_name,
 733                                req->rq_export->exp_client_uuid.uuid,
 734                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 735                                req->rq_peerstr);
 736                         ptlrpc_fail_export(req->rq_export);
 737                 } else {
 738                         CERROR("ignoring bulk IO comms error: "
 739                                "client reconnected %s@%s id %s\n",
 740                                req->rq_export->exp_client_uuid.uuid,
 741                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 742                                req->rq_peerstr);
 743                 }
 744         }
 745         RETURN(rc);
 746 }
 747
 748 static int ost_san_brw(struct ptlrpc_request *req, int cmd)
 749 {
 750         struct niobuf_remote *remote_nb, *res_nb, *pp_rnb;
 751         struct obd_ioobj *ioo;
 752         struct ost_body *body, *repbody;
 753         int rc, i, objcount, niocount, size[2] = {sizeof(*body)}, npages;
 754         int swab;
 755         ENTRY;
 756
 757         /* XXX not set to use latest protocol */
 758
 759         swab = lustre_msg_swabbed(req->rq_reqmsg);
 760         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 761         if (body == NULL) {
 762                 CERROR("Missing/short ost_body\n");
 763                 GOTO(out, rc = -EFAULT);
 764         }
 765
 766         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 767         if (ioo == NULL) {
 768                 CERROR("Missing/short ioobj\n");
 769                 GOTO(out, rc = -EFAULT);
 770         }
 771         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 772         niocount = ioo[0].ioo_bufcnt;
 773         for (i = 1; i < objcount; i++) {
 774                 if (swab)
 775                         lustre_swab_obd_ioobj (&ioo[i]);
 776                 niocount += ioo[i].ioo_bufcnt;
 777         }
 778
 779         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 780                                        lustre_swab_niobuf_remote);
 781         if (remote_nb == NULL) {
 782                 CERROR("Missing/short niobuf\n");
 783                 GOTO(out, rc = -EFAULT);
 784         }
 785         if (swab) {                             /* swab the remaining niobufs */
 786                 for (i = 1; i < niocount; i++)
 787                         lustre_swab_niobuf_remote (&remote_nb[i]);
 788         }
 789
 790         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 791         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 792         if (npages < 0)
 793                 GOTO (out, rc = npages);
 794
 795         size[1] = npages * sizeof(*pp_rnb);
 796         rc = lustre_pack_reply(req, 2, size, NULL);
 797         if (rc)
 798                 GOTO(out_pp_rnb, rc);
 799
 800         req->rq_status = obd_san_preprw(cmd, req->rq_export, &body->oa,
 801                                         objcount, ioo, npages, pp_rnb);
 802
 803         if (req->rq_status)
 804                 GOTO(out_pp_rnb, rc = 0);
 805
 806         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 807         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 808
 809         res_nb = lustre_msg_buf(req->rq_repmsg, 1, size[1]);
 810         memcpy(res_nb, remote_nb, size[1]);
 811         rc = 0;
 812 out_pp_rnb:
 813         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 814 out:
 815         target_committed_to_req(req);
 816         if (rc) {
 817                 req->rq_status = rc;
 818                 ptlrpc_error(req);
 819         } else {
 820                 ptlrpc_reply(req);
 821         }
 822
 823         return rc;
 824 }
 825
 826
 827 static int ost_set_info(struct obd_export *exp, struct ptlrpc_request *req)
 828 {
 829         char *key;
 830         int keylen, rc = 0;
 831         ENTRY;
 832
 833         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 834         if (key == NULL) {
 835                 DEBUG_REQ(D_HA, req, "no set_info key");
 836                 RETURN(-EFAULT);
 837         }
 838         keylen = req->rq_reqmsg->buflens[0];
 839
 840         rc = lustre_pack_reply(req, 0, NULL, NULL);
 841         if (rc)
 842                 RETURN(rc);
 843
 844         rc = obd_set_info(exp, keylen, key, 0, NULL);
 845         req->rq_repmsg->status = 0;
 846         RETURN(rc);
 847 }
 848
 849 static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
 850 {
 851         char *key;
 852         int keylen, rc = 0, size = sizeof(obd_id);
 853         obd_id *reply;
 854         ENTRY;
 855
 856         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 857         if (key == NULL) {
 858                 DEBUG_REQ(D_HA, req, "no get_info key");
 859                 RETURN(-EFAULT);
 860         }
 861         keylen = req->rq_reqmsg->buflens[0];
 862
 863         if (keylen < strlen("last_id") || memcmp(key, "last_id", 7) != 0)
 864                 RETURN(-EPROTO);
 865
 866         rc = lustre_pack_reply(req, 1, &size, NULL);
 867         if (rc)
 868                 RETURN(rc);
 869
 870         reply = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply));
 871         rc = obd_get_info(exp, keylen, key, &size, reply);
 872         req->rq_repmsg->status = 0;
 873         RETURN(rc);
 874 }
 875
 876 static int ost_filter_recovery_request(struct ptlrpc_request *req,
 877                                        struct obd_device *obd, int *process)
 878 {
 879         switch (req->rq_reqmsg->opc) {
 880         case OST_CONNECT: /* This will never get here, but for completeness. */
 881         case OST_DISCONNECT:
 882                *process = 1;
 883                RETURN(0);
 884
 885         case OBD_PING:
 886         case OST_CREATE:
 887         case OST_DESTROY:
 888         case OST_PUNCH:
 889         case OST_SETATTR:
 890         case OST_SYNC:
 891         case OST_WRITE:
 892         case OBD_LOG_CANCEL:
 893         case LDLM_ENQUEUE:
 894                 *process = target_queue_recovery_request(req, obd);
 895                 RETURN(0);
 896
 897         default:
 898                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
 899                 *process = 0;
 900                 /* XXX what should we set rq_status to here? */
 901                 req->rq_status = -EAGAIN;
 902                 RETURN(ptlrpc_error(req));
 903         }
 904 }
 905
 906
 907
 908 static int ost_handle(struct ptlrpc_request *req)
 909 {
 910         struct obd_trans_info trans_info = { 0, };
 911         struct obd_trans_info *oti = &trans_info;
 912         int should_process, fail = OBD_FAIL_OST_ALL_REPLY_NET, rc = 0;
 913         struct obd_device *obd = NULL;
 914         ENTRY;
 915
 916         LASSERT(current->journal_info == NULL);
 917         /* XXX identical to MDS */
 918         if (req->rq_reqmsg->opc != OST_CONNECT) {
 919                 int abort_recovery, recovering;
 920
 921                 if (req->rq_export == NULL) {
 922                         CDEBUG(D_HA, "operation %d on unconnected OST\n",
 923                                req->rq_reqmsg->opc);
 924                         req->rq_status = -ENOTCONN;
 925                         GOTO(out, rc = -ENOTCONN);
 926                 }
 927
 928                 obd = req->rq_export->exp_obd;
 929
 930                 /* Check for aborted recovery. */
 931                 spin_lock_bh(&obd->obd_processing_task_lock);
 932                 abort_recovery = obd->obd_abort_recovery;
 933                 recovering = obd->obd_recovering;
 934                 spin_unlock_bh(&obd->obd_processing_task_lock);
 935                 if (abort_recovery) {
 936                         target_abort_recovery(obd);
 937                 } else if (recovering) {
 938                         rc = ost_filter_recovery_request(req, obd,
 939                                                          &should_process);
 940                         if (rc || !should_process)
 941                                 RETURN(rc);
 942                 }
 943         }
 944
 945         oti_init(oti, req);
 946
 947         switch (req->rq_reqmsg->opc) {
 948         case OST_CONNECT: {
 949                 CDEBUG(D_INODE, "connect\n");
 950                 OBD_FAIL_RETURN(OBD_FAIL_OST_CONNECT_NET, 0);
 951                 rc = target_handle_connect(req, ost_handle);
 952                 if (!rc)
 953                         obd = req->rq_export->exp_obd;
 954                 break;
 955         }
 956         case OST_DISCONNECT:
 957                 CDEBUG(D_INODE, "disconnect\n");
 958                 OBD_FAIL_RETURN(OBD_FAIL_OST_DISCONNECT_NET, 0);
 959                 rc = target_handle_disconnect(req);
 960                 break;
 961         case OST_CREATE:
 962                 CDEBUG(D_INODE, "create\n");
 963                 OBD_FAIL_RETURN(OBD_FAIL_OST_CREATE_NET, 0);
 964                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_OST_ENOSPC))
 965                         GOTO(out, rc = -ENOSPC);
 966                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_OST_EROFS))
 967                         GOTO(out, rc = -EROFS);
 968                 rc = ost_create(req->rq_export, req, oti);
 969                 break;
 970         case OST_DESTROY:
 971                 CDEBUG(D_INODE, "destroy\n");
 972                 OBD_FAIL_RETURN(OBD_FAIL_OST_DESTROY_NET, 0);
 973                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_OST_EROFS))
 974                         GOTO(out, rc = -EROFS);
 975                 rc = ost_destroy(req->rq_export, req, oti);
 976                 break;
 977         case OST_GETATTR:
 978                 CDEBUG(D_INODE, "getattr\n");
 979                 OBD_FAIL_RETURN(OBD_FAIL_OST_GETATTR_NET, 0);
 980                 rc = ost_getattr(req->rq_export, req);
 981                 break;
 982         case OST_SETATTR:
 983                 CDEBUG(D_INODE, "setattr\n");
 984                 OBD_FAIL_RETURN(OBD_FAIL_OST_SETATTR_NET, 0);
 985                 rc = ost_setattr(req->rq_export, req, oti);
 986                 break;
 987         case OST_WRITE:
 988                 CDEBUG(D_INODE, "write\n");
 989                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 990                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_OST_ENOSPC))
 991                         GOTO(out, rc = -ENOSPC);
 992                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_OST_EROFS))
 993                         GOTO(out, rc = -EROFS);
 994                 rc = ost_brw_write(req, oti);
 995                 LASSERT(current->journal_info == NULL);
 996                 /* ost_brw sends its own replies */
 997                 RETURN(rc);
 998         case OST_READ:
 999                 CDEBUG(D_INODE, "read\n");
1000                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1001                 rc = ost_brw_read(req, oti);
1002                 LASSERT(current->journal_info == NULL);
1003                 /* ost_brw sends its own replies */
1004                 RETURN(rc);
1005         case OST_SAN_READ:
1006                 CDEBUG(D_INODE, "san read\n");
1007                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1008                 rc = ost_san_brw(req, OBD_BRW_READ);
1009                 /* ost_san_brw sends its own replies */
1010                 RETURN(rc);
1011         case OST_SAN_WRITE:
1012                 CDEBUG(D_INODE, "san write\n");
1013                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1014                 rc = ost_san_brw(req, OBD_BRW_WRITE);
1015                 /* ost_san_brw sends its own replies */
1016                 RETURN(rc);
1017         case OST_PUNCH:
1018                 CDEBUG(D_INODE, "punch\n");
1019                 OBD_FAIL_RETURN(OBD_FAIL_OST_PUNCH_NET, 0);
1020                 if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_OST_EROFS))
1021                         GOTO(out, rc = -EROFS);
1022                 rc = ost_punch(req->rq_export, req, oti);
1023                 break;
1024         case OST_STATFS:
1025                 CDEBUG(D_INODE, "statfs\n");
1026                 OBD_FAIL_RETURN(OBD_FAIL_OST_STATFS_NET, 0);
1027                 rc = ost_statfs(req);
1028                 break;
1029         case OST_SYNC:
1030                 CDEBUG(D_INODE, "sync\n");
1031                 OBD_FAIL_RETURN(OBD_FAIL_OST_SYNC_NET, 0);
1032                 rc = ost_sync(req->rq_export, req);
1033                 break;
1034         case OST_SET_INFO:
1035                 DEBUG_REQ(D_INODE, req, "set_info");
1036                 rc = ost_set_info(req->rq_export, req);
1037                 break;
1038         case OST_GET_INFO:
1039                 DEBUG_REQ(D_INODE, req, "get_info");
1040                 rc = ost_get_info(req->rq_export, req);
1041                 break;
1042         case OBD_PING:
1043                 DEBUG_REQ(D_INODE, req, "ping");
1044                 rc = target_handle_ping(req);
1045                 break;
1046         /* FIXME - just reply status */
1047         case LLOG_ORIGIN_CONNECT:
1048                 DEBUG_REQ(D_INODE, req, "log connect\n");
1049                 rc = llog_handle_connect(req);
1050                 req->rq_status = rc;
1051                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1052                 if (rc)
1053                         RETURN(rc);
1054                 RETURN(ptlrpc_reply(req));
1055         case OBD_LOG_CANCEL:
1056                 CDEBUG(D_INODE, "log cancel\n");
1057                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOG_CANCEL_NET, 0);
1058                 rc = llog_origin_handle_cancel(req);
1059                 req->rq_status = rc;
1060                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1061                 if (rc)
1062                         RETURN(rc);
1063                 RETURN(ptlrpc_reply(req));
1064         case LDLM_ENQUEUE:
1065                 CDEBUG(D_INODE, "enqueue\n");
1066                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
1067                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1068                                          ldlm_server_blocking_ast,
1069                                          ldlm_server_glimpse_ast);
1070                 fail = OBD_FAIL_OST_LDLM_REPLY_NET;
1071                 break;
1072         case LDLM_CONVERT:
1073                 CDEBUG(D_INODE, "convert\n");
1074                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
1075                 rc = ldlm_handle_convert(req);
1076                 break;
1077         case LDLM_CANCEL:
1078                 CDEBUG(D_INODE, "cancel\n");
1079                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CANCEL, 0);
1080                 rc = ldlm_handle_cancel(req);
1081                 break;
1082         case LDLM_BL_CALLBACK:
1083         case LDLM_CP_CALLBACK:
1084                 CDEBUG(D_INODE, "callback\n");
1085                 CERROR("callbacks should not happen on OST\n");
1086                 /* fall through */
1087         default:
1088                 CERROR("Unexpected opcode %d\n", req->rq_reqmsg->opc);
1089                 req->rq_status = -ENOTSUPP;
1090                 rc = ptlrpc_error(req);
1091                 RETURN(rc);
1092         }
1093
1094         LASSERT(current->journal_info == NULL);
1095
1096         EXIT;
1097         /* If we're DISCONNECTing, the export_data is already freed */
1098         if (!rc && req->rq_reqmsg->opc != OST_DISCONNECT)
1099                 target_committed_to_req(req);
1100
1101 out:
1102         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LAST_REPLAY) {
1103                 if (obd && obd->obd_recovering) {
1104                         DEBUG_REQ(D_HA, req, "LAST_REPLAY, queuing reply");
1105                         return target_queue_final_reply(req, rc);
1106                 }
1107                 /* Lost a race with recovery; let the error path DTRT. */
1108                 rc = req->rq_status = -ENOTCONN;
1109         }
1110
1111         if (!rc)
1112                 oti_to_request(oti, req);
1113
1114         target_send_reply(req, rc, fail);
1115         return 0;
1116 }
1117
1118 static int ost_setup(struct obd_device *obd, obd_count len, void *buf)
1119 {
1120         struct ost_obd *ost = &obd->u.ost;
1121         struct lprocfs_static_vars lvars;
1122         int rc;
1123         ENTRY;
1124
1125         rc = cleanup_group_info();
1126         if (rc)
1127                 RETURN(rc);
1128
1129         rc = llog_start_commit_thread();
1130         if (rc < 0)
1131                 RETURN(rc);
1132
1133         lprocfs_init_vars(ost, &lvars);
1134         lprocfs_obd_setup(obd, lvars.obd_vars);
1135
1136         ost->ost_service =
1137                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
1138                                 OST_REQUEST_PORTAL, OSC_REPLY_PORTAL, 30000,
1139                                 ost_handle, "ost",
1140                                 obd->obd_proc_entry,
1141                                 ost_print_req);
1142         if (ost->ost_service == NULL) {
1143                 CERROR("failed to start service\n");
1144                 GOTO(out_lprocfs, rc = -ENOMEM);
1145         }
1146
1147         rc = ptlrpc_start_n_threads(obd, ost->ost_service, OST_NUM_THREADS,
1148                                     "ll_ost");
1149         if (rc)
1150                 GOTO(out_service, rc = -EINVAL);
1151
1152         ost->ost_create_service =
1153                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
1154                                 OST_CREATE_PORTAL, OSC_REPLY_PORTAL, 30000,
1155                                 ost_handle, "ost_create",
1156                                 obd->obd_proc_entry,
1157                                 ost_print_req);
1158         if (ost->ost_create_service == NULL) {
1159                 CERROR("failed to start OST create service\n");
1160                 GOTO(out_service, rc = -ENOMEM);
1161         }
1162
1163         rc = ptlrpc_start_n_threads(obd, ost->ost_create_service, 1,
1164                                     "ll_ost_creat");
1165         if (rc)
1166                 GOTO(out_create, rc = -EINVAL);
1167
1168         RETURN(0);
1169
1170 out_create:
1171         ptlrpc_unregister_service(ost->ost_create_service);
1172 out_service:
1173         ptlrpc_unregister_service(ost->ost_service);
1174 out_lprocfs:
1175         lprocfs_obd_cleanup(obd);
1176         RETURN(rc);
1177 }
1178
1179 static int ost_cleanup(struct obd_device *obd, int flags)
1180 {
1181         struct ost_obd *ost = &obd->u.ost;
1182         int err = 0;
1183         ENTRY;
1184
1185         spin_lock_bh(&obd->obd_processing_task_lock);
1186         if (obd->obd_recovering) {
1187                 target_cancel_recovery_timer(obd);
1188                 obd->obd_recovering = 0;
1189         }
1190         spin_unlock_bh(&obd->obd_processing_task_lock);
1191
1192         ptlrpc_unregister_service(ost->ost_service);
1193         ptlrpc_unregister_service(ost->ost_create_service);
1194
1195         lprocfs_obd_cleanup(obd);
1196
1197         RETURN(err);
1198 }
1199
1200 /* use obd ops to offer management infrastructure */
1201 static struct obd_ops ost_obd_ops = {
1202         .o_owner        = THIS_MODULE,
1203         .o_setup        = ost_setup,
1204         .o_cleanup      = ost_cleanup,
1205 };
1206
1207 static int __init ost_init(void)
1208 {
1209         struct lprocfs_static_vars lvars;
1210         ENTRY;
1211
1212         lprocfs_init_vars(ost,&lvars);
1213         RETURN(class_register_type(&ost_obd_ops, lvars.module_vars,
1214                                    LUSTRE_OST_NAME));
1215 }
1216
1217 static void /*__exit*/ ost_exit(void)
1218 {
1219         class_unregister_type(LUSTRE_OST_NAME);
1220 }
1221
1222 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1223 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
1224 MODULE_LICENSE("GPL");
1225
1226 module_init(ost_init);
1227 module_exit(ost_exit);