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 <libcfs/list.h>
  47 #include <linux/lustre_sec.h>
  48 #include <linux/lustre_audit.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, 0, 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         struct ptlrpc_bulk_page *bp;
 348
 349         list_for_each_entry(bp, &desc->bd_page_list, bp_link) {
 350                 ost_checksum(&cksum, kmap(bp->bp_page) + bp->bp_pageoffset,
 351                              bp->bp_buflen);
 352                 kunmap(bp->bp_page);
 353         }
 354
 355         return cksum;
 356 }
 357 #endif
 358
 359 static void ost_stime_record(struct ptlrpc_request *req, struct timeval *start,
 360                              unsigned rw, unsigned phase)
 361 {
 362         struct obd_device *obd = req->rq_svc->srv_obddev;
 363         struct timeval stop;
 364         int ind = rw *3 + phase;
 365
 366         if (obd && obd->obd_type && obd->obd_type->typ_name) {
 367                 if (!strcmp(obd->obd_type->typ_name, OBD_OST_DEVICENAME)) {
 368                         struct ost_obd *ost = NULL;
 369
 370                         ost = &obd->u.ost;
 371                         if (ind >= (sizeof(ost->ost_stimes) /
 372                                     sizeof(ost->ost_stimes[0])))
 373                                return;
 374                         do_gettimeofday(&stop);
 375
 376                         spin_lock(&ost->ost_lock);
 377                         lprocfs_stime_record(&ost->ost_stimes[ind],&stop,start);
 378                         spin_unlock(&ost->ost_lock);
 379                         memcpy(start, &stop, sizeof(*start));
 380                 }
 381        }
 382 }
 383
 384 static int ost_brw_read(struct ptlrpc_request *req)
 385 {
 386         struct ptlrpc_bulk_desc *desc;
 387         struct niobuf_remote    *remote_nb;
 388         struct niobuf_remote    *pp_rnb;
 389         struct niobuf_local     *local_nb;
 390         struct obd_ioobj        *ioo;
 391         struct ost_body         *body, *repbody;
 392         struct l_wait_info       lwi;
 393         struct obd_trans_info    oti = { 0 };
 394         int                      size[1] = { sizeof(*body) };
 395         int                      comms_error = 0;
 396         int                      niocount;
 397         int                      npages;
 398         int                      nob = 0;
 399         int                      rc;
 400         int                      i;
 401         struct timeval           start;
 402         ENTRY;
 403
 404         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
 405                 GOTO(out, rc = -EIO);
 406
 407         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 408                          (obd_timeout + 1) / 4);
 409
 410         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 411         if (body == NULL) {
 412                 CERROR("Missing/short ost_body\n");
 413                 GOTO(out, rc = -EFAULT);
 414         }
 415
 416         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 417         if (ioo == NULL) {
 418                 CERROR("Missing/short ioobj\n");
 419                 GOTO(out, rc = -EFAULT);
 420         }
 421
 422         niocount = ioo->ioo_bufcnt;
 423         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 424                                        lustre_swab_niobuf_remote);
 425         if (remote_nb == NULL) {
 426                 CERROR("Missing/short niobuf\n");
 427                 GOTO(out, rc = -EFAULT);
 428         }
 429         if (lustre_msg_swabbed(req->rq_reqmsg)) { /* swab remaining niobufs */
 430                 for (i = 1; i < niocount; i++)
 431                         lustre_swab_niobuf_remote (&remote_nb[i]);
 432         }
 433
 434         rc = lustre_pack_reply(req, 1, size, NULL);
 435         if (rc)
 436                 GOTO(out, rc);
 437
 438         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 439         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 440         npages = get_per_page_niobufs(ioo, 1, remote_nb, niocount, &pp_rnb);
 441         if (npages < 0)
 442                 GOTO(out, rc = npages);
 443
 444         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 445         if (local_nb == NULL)
 446                 GOTO(out_pp_rnb, rc = -ENOMEM);
 447
 448         desc = ptlrpc_prep_bulk_exp (req, npages,
 449                                      BULK_PUT_SOURCE, OST_BULK_PORTAL);
 450         if (desc == NULL)
 451                 GOTO(out_local, rc = -ENOMEM);
 452
 453         do_gettimeofday(&start);
 454         rc = obd_preprw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 455                         ioo, npages, pp_rnb, local_nb, &oti);
 456         ost_stime_record(req, &start, 0, 0);
 457         if (rc != 0)
 458                 GOTO(out_bulk, rc);
 459
 460         /* We're finishing using body->oa as an input variable */
 461         body->oa.o_valid = 0;
 462
 463         nob = 0;
 464         for (i = 0; i < npages; i++) {
 465                 int page_rc = local_nb[i].rc;
 466
 467                 if (page_rc < 0) {              /* error */
 468                         rc = page_rc;
 469                         break;
 470                 }
 471
 472                 LASSERT(page_rc <= pp_rnb[i].len);
 473                 nob += page_rc;
 474                 if (page_rc != 0) {             /* some data! */
 475                         LASSERT (local_nb[i].page != NULL);
 476                         ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 477                                               pp_rnb[i].offset & (PAGE_SIZE-1),
 478                                               page_rc);
 479                 }
 480
 481                 if (page_rc != pp_rnb[i].len) { /* short read */
 482                         /* All subsequent pages should be 0 */
 483                         while(++i < npages)
 484                                 LASSERT(local_nb[i].rc == 0);
 485                         break;
 486                 }
 487         }
 488
 489         if (rc == 0) {
 490                 rc = ptlrpc_start_bulk_transfer(desc);
 491                 if (rc == 0) {
 492                         lwi = LWI_TIMEOUT(obd_timeout * HZ / 4,
 493                                           ost_bulk_timeout, desc);
 494                         rc = l_wait_event(desc->bd_waitq,
 495                                           !ptlrpc_bulk_active(desc), &lwi);
 496                         LASSERT(rc == 0 || rc == -ETIMEDOUT);
 497                         if (rc == -ETIMEDOUT) {
 498                                 DEBUG_REQ(D_ERROR, req, "timeout on bulk PUT"
 499                                           ", expt_conn_cnt = %u",
 500                                           req->rq_export->exp_conn_cnt);
 501                                 ptlrpc_abort_bulk(desc);
 502                         } else if (!desc->bd_success ||
 503                                    desc->bd_nob_transferred != desc->bd_nob) {
 504                                 DEBUG_REQ(D_ERROR, req, "%s bulk PUT %d(%d)",
 505                                           desc->bd_success ?
 506                                           "truncated" : "network error on",
 507                                           desc->bd_nob_transferred,
 508                                           desc->bd_nob);
 509                                 /* XXX should this be a different errno? */
 510                                 rc = -ETIMEDOUT;
 511                         }
 512                 } else {
 513                         DEBUG_REQ(D_ERROR, req, "bulk PUT failed: rc %d\n", rc);
 514                 }
 515                 comms_error = rc != 0;
 516         }
 517
 518         ost_stime_record(req, &start, 0, 1);
 519         /* Must commit after prep above in all cases */
 520         rc = obd_commitrw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 521                           ioo, npages, local_nb, &oti, rc);
 522         ost_stime_record(req, &start, 0, 2);
 523
 524         if (rc == 0) {
 525                 repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 526                 memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 527
 528 #if CHECKSUM_BULK
 529                 repbody->oa.o_cksum = ost_checksum_bulk(desc);
 530                 repbody->oa.o_valid |= OBD_MD_FLCKSUM;
 531 #endif
 532         }
 533
 534  out_bulk:
 535         ptlrpc_free_bulk(desc);
 536  out_local:
 537         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 538  out_pp_rnb:
 539         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 540  out:
 541         LASSERT(rc <= 0);
 542         if (rc == 0) {
 543                 req->rq_status = nob;
 544                 ptlrpc_reply(req);
 545         } else if (!comms_error) {
 546                 /* only reply if comms OK */
 547                 req->rq_status = rc;
 548                 ptlrpc_error(req);
 549         } else {
 550                 if (req->rq_reply_state != NULL) {
 551                         /* reply out callback would free */
 552                         lustre_free_reply_state (req->rq_reply_state);
 553                 }
 554                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 555                         CERROR("bulk IO comms error: "
 556                                "evicting %s@%s id %s\n",
 557                                req->rq_export->exp_client_uuid.uuid,
 558                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 559                                req->rq_peerstr);
 560                         ptlrpc_fail_export(req->rq_export);
 561                 } else {
 562                         CERROR("ignoring bulk IO comms error: "
 563                                "client reconnected %s@%s id %s\n",
 564                                req->rq_export->exp_client_uuid.uuid,
 565                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 566                                req->rq_peerstr);
 567                 }
 568         }
 569
 570         RETURN(rc);
 571 }
 572
 573 int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
 574 {
 575         struct ptlrpc_bulk_desc *desc;
 576         struct niobuf_remote    *remote_nb;
 577         struct niobuf_remote    *pp_rnb;
 578         struct niobuf_local     *local_nb;
 579         struct obd_ioobj        *ioo;
 580         struct ost_body         *body, *repbody;
 581         struct l_wait_info       lwi;
 582         __u32                   *rcs;
 583         int                      size[2] = { sizeof(*body) };
 584         int                      objcount, niocount, npages;
 585         int                      comms_error = 0;
 586         int                      rc, swab, i, j;
 587         struct timeval           start;
 588         ENTRY;
 589
 590         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
 591                 GOTO(out, rc = -EIO);
 592
 593         /* pause before transaction has been started */
 594         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 595                          (obd_timeout + 1) / 4);
 596
 597         swab = lustre_msg_swabbed(req->rq_reqmsg);
 598         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 599         if (body == NULL) {
 600                 CERROR("Missing/short ost_body\n");
 601                 GOTO(out, rc = -EFAULT);
 602         }
 603
 604         LASSERT_REQSWAB(req, 1);
 605         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 606         if (objcount == 0) {
 607                 CERROR("Missing/short ioobj\n");
 608                 GOTO(out, rc = -EFAULT);
 609         }
 610         ioo = lustre_msg_buf (req->rq_reqmsg, 1, objcount * sizeof(*ioo));
 611         LASSERT (ioo != NULL);
 612         for (niocount = i = 0; i < objcount; i++) {
 613                 if (swab)
 614                         lustre_swab_obd_ioobj (&ioo[i]);
 615                 if (ioo[i].ioo_bufcnt == 0) {
 616                         CERROR("ioo[%d] has zero bufcnt\n", i);
 617                         GOTO(out, rc = -EFAULT);
 618                 }
 619                 niocount += ioo[i].ioo_bufcnt;
 620         }
 621
 622         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 623                                        lustre_swab_niobuf_remote);
 624         if (remote_nb == NULL) {
 625                 CERROR("Missing/short niobuf\n");
 626                 GOTO(out, rc = -EFAULT);
 627         }
 628         if (swab) {                             /* swab the remaining niobufs */
 629                 for (i = 1; i < niocount; i++)
 630                         lustre_swab_niobuf_remote (&remote_nb[i]);
 631         }
 632
 633         size[1] = niocount * sizeof(*rcs);
 634         rc = lustre_pack_reply(req, 2, size, NULL);
 635         if (rc != 0)
 636                 GOTO(out, rc);
 637         rcs = lustre_msg_buf(req->rq_repmsg, 1, niocount * sizeof(*rcs));
 638
 639 #if 0
 640         /* Do snap options here*/
 641         rc = obd_do_cow(req->rq_export, ioo, objcount, remote_nb);
 642         if (rc)
 643                 GOTO(out, rc);
 644 #endif
 645
 646         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 647         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 648         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 649         if (npages < 0)
 650                 GOTO(out, rc = npages);
 651
 652         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 653         if (local_nb == NULL)
 654                 GOTO(out_pp_rnb, rc = -ENOMEM);
 655
 656         desc = ptlrpc_prep_bulk_exp (req, npages,
 657                                      BULK_GET_SINK, OST_BULK_PORTAL);
 658         if (desc == NULL)
 659                 GOTO(out_local, rc = -ENOMEM);
 660
 661         do_gettimeofday(&start);
 662         rc = obd_preprw(OBD_BRW_WRITE, req->rq_export, &body->oa, objcount,
 663                         ioo, npages, pp_rnb, local_nb, oti);
 664         ost_stime_record(req, &start, 1, 0);
 665         if (rc != 0)
 666                 GOTO(out_bulk, rc);
 667
 668         /* NB Having prepped, we must commit... */
 669
 670         for (i = 0; i < npages; i++)
 671                 ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 672                                       pp_rnb[i].offset & (PAGE_SIZE - 1),
 673                                       pp_rnb[i].len);
 674
 675         rc = ptlrpc_start_bulk_transfer (desc);
 676         if (rc == 0) {
 677                 lwi = LWI_TIMEOUT(obd_timeout * HZ / 4,
 678                                   ost_bulk_timeout, desc);
 679                 rc = l_wait_event(desc->bd_waitq, !ptlrpc_bulk_active(desc),
 680                                   &lwi);
 681                 LASSERT(rc == 0 || rc == -ETIMEDOUT);
 682                 if (rc == -ETIMEDOUT) {
 683                         DEBUG_REQ(D_ERROR, req, "timeout on bulk GET");
 684                         ptlrpc_abort_bulk(desc);
 685                 } else if (!desc->bd_success ||
 686                            desc->bd_nob_transferred != desc->bd_nob) {
 687                         DEBUG_REQ(D_ERROR, req, "%s bulk GET %d(%d)",
 688                                   desc->bd_success ?
 689                                   "truncated" : "network error on",
 690                                   desc->bd_nob_transferred, desc->bd_nob);
 691                         /* XXX should this be a different errno? */
 692                         rc = -ETIMEDOUT;
 693                 }
 694         } else {
 695                 DEBUG_REQ(D_ERROR, req, "ptlrpc_bulk_get failed: rc %d\n", rc);
 696         }
 697         comms_error = rc != 0;
 698
 699         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 700         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 701
 702 #if CHECKSUM_BULK
 703         if (rc == 0 && (body->oa.o_valid & OBD_MD_FLCKSUM) != 0) {
 704                 static int cksum_counter;
 705                 obd_count client_cksum = body->oa.o_cksum;
 706                 obd_count cksum = ost_checksum_bulk(desc);
 707
 708                 if (client_cksum != cksum) {
 709                         CERROR("Bad checksum: client %x, server %x id %s\n",
 710                                client_cksum, cksum,
 711                                req->rq_peerstr);
 712                         cksum_counter = 1;
 713                         repbody->oa.o_cksum = cksum;
 714                 } else {
 715                         cksum_counter++;
 716                         if ((cksum_counter & (-cksum_counter)) == cksum_counter)
 717                                 CWARN("Checksum %u from NID %s: %x OK\n",
 718                                       cksum_counter, req->rq_peerstr, cksum);
 719                 }
 720         }
 721 #endif
 722         ost_stime_record(req, &start, 1, 1);
 723         /* Must commit after prep above in all cases */
 724         rc = obd_commitrw(OBD_BRW_WRITE, req->rq_export, &repbody->oa,
 725                           objcount, ioo, npages, local_nb, oti, rc);
 726
 727         ost_stime_record(req, &start, 1, 2);
 728         if (rc == 0) {
 729 #if CHECKSUM_BULK
 730                 repbody->oa.o_cksum = ost_checksum_bulk(desc);
 731                 repbody->oa.o_valid |= OBD_MD_FLCKSUM;
 732 #endif
 733                 /* set per-requested niobuf return codes */
 734                 for (i = j = 0; i < niocount; i++) {
 735                         int nob = remote_nb[i].len;
 736
 737                         rcs[i] = 0;
 738                         do {
 739                                 LASSERT(j < npages);
 740                                 if (local_nb[j].rc < 0)
 741                                         rcs[i] = local_nb[j].rc;
 742                                 nob -= pp_rnb[j].len;
 743                                 j++;
 744                         } while (nob > 0);
 745                         LASSERT(nob == 0);
 746                 }
 747                 LASSERT(j == npages);
 748         }
 749         /*XXX This write extents only for write-back cache extents*/
 750         rc = obd_write_extents(req->rq_export, ioo, objcount, niocount,
 751                                local_nb, rc);
 752  out_bulk:
 753         ptlrpc_free_bulk(desc);
 754  out_local:
 755         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 756  out_pp_rnb:
 757         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 758  out:
 759         if (rc == 0) {
 760                 oti_to_request(oti, req);
 761                 rc = ptlrpc_reply(req);
 762         } else if (!comms_error) {
 763                 /* Only reply if there was no comms problem with bulk */
 764                 req->rq_status = rc;
 765                 ptlrpc_error(req);
 766         } else {
 767                 if (req->rq_reply_state != NULL) {
 768                         /* reply out callback would free */
 769                         lustre_free_reply_state (req->rq_reply_state);
 770                 }
 771                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 772                         CERROR("%s: bulk IO comm error evicting %s@%s id %s\n",
 773                                req->rq_export->exp_obd->obd_name,
 774                                req->rq_export->exp_client_uuid.uuid,
 775                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 776                                req->rq_peerstr);
 777                         ptlrpc_fail_export(req->rq_export);
 778                 } else {
 779                         CERROR("ignoring bulk IO comms error: "
 780                                "client reconnected %s@%s id %s\n",
 781                                req->rq_export->exp_client_uuid.uuid,
 782                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 783                                req->rq_peerstr);
 784                 }
 785         }
 786         RETURN(rc);
 787 }
 788 EXPORT_SYMBOL(ost_brw_write);
 789
 790 static int ost_san_brw(struct ptlrpc_request *req, int cmd)
 791 {
 792         struct niobuf_remote *remote_nb, *res_nb, *pp_rnb;
 793         struct obd_ioobj *ioo;
 794         struct ost_body *body, *repbody;
 795         int rc, i, objcount, niocount, size[2] = {sizeof(*body)}, npages;
 796         int swab;
 797         ENTRY;
 798
 799         /* XXX not set to use latest protocol */
 800
 801         swab = lustre_msg_swabbed(req->rq_reqmsg);
 802         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 803         if (body == NULL) {
 804                 CERROR("Missing/short ost_body\n");
 805                 GOTO(out, rc = -EFAULT);
 806         }
 807
 808         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 809         if (ioo == NULL) {
 810                 CERROR("Missing/short ioobj\n");
 811                 GOTO(out, rc = -EFAULT);
 812         }
 813         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 814         niocount = ioo[0].ioo_bufcnt;
 815         for (i = 1; i < objcount; i++) {
 816                 if (swab)
 817                         lustre_swab_obd_ioobj (&ioo[i]);
 818                 niocount += ioo[i].ioo_bufcnt;
 819         }
 820
 821         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 822                                        lustre_swab_niobuf_remote);
 823         if (remote_nb == NULL) {
 824                 CERROR("Missing/short niobuf\n");
 825                 GOTO(out, rc = -EFAULT);
 826         }
 827         if (swab) {                             /* swab the remaining niobufs */
 828                 for (i = 1; i < niocount; i++)
 829                         lustre_swab_niobuf_remote (&remote_nb[i]);
 830         }
 831
 832         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 833         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 834         if (npages < 0)
 835                 GOTO (out, rc = npages);
 836
 837         size[1] = npages * sizeof(*pp_rnb);
 838         rc = lustre_pack_reply(req, 2, size, NULL);
 839         if (rc)
 840                 GOTO(out_pp_rnb, rc);
 841
 842         req->rq_status = obd_san_preprw(cmd, req->rq_export, &body->oa,
 843                                         objcount, ioo, npages, pp_rnb);
 844
 845         if (req->rq_status)
 846                 GOTO(out_pp_rnb, rc = 0);
 847
 848         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 849         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 850
 851         res_nb = lustre_msg_buf(req->rq_repmsg, 1, size[1]);
 852         memcpy(res_nb, remote_nb, size[1]);
 853         rc = 0;
 854 out_pp_rnb:
 855         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 856 out:
 857         if (rc) {
 858                 req->rq_status = rc;
 859                 ptlrpc_error(req);
 860         } else
 861                 ptlrpc_reply(req);
 862
 863         return rc;
 864 }
 865
 866 static int ost_set_info(struct obd_export *exp, struct ptlrpc_request *req)
 867 {
 868         char *key, *val;
 869         int keylen, rc = 0;
 870         ENTRY;
 871
 872         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 873         if (key == NULL) {
 874                 DEBUG_REQ(D_HA, req, "no set_info key");
 875                 RETURN(-EFAULT);
 876         }
 877         keylen = req->rq_reqmsg->buflens[0];
 878
 879         rc = lustre_pack_reply(req, 0, NULL, NULL);
 880         if (rc)
 881                 RETURN(rc);
 882
 883         val = lustre_msg_buf(req->rq_reqmsg, 1, 0);
 884
 885         if (keylen == 8 && memcmp(key, "auditlog", 8) == 0) {
 886                 lustre_swab_reqbuf(req, 1, sizeof(struct audit_msg),
 887                                    lustre_swab_audit_msg);
 888         }
 889         else if (keylen == 5 && strcmp(key, "audit") == 0) {
 890                 lustre_swab_reqbuf(req, 1, sizeof(struct audit_attr_msg),
 891                                    lustre_swab_audit_attr);
 892         }
 893         else if (keylen == 9 && strcmp(key, "audit_obj") == 0) {
 894                 lustre_swab_reqbuf(req, 1, sizeof(struct obdo),
 895                                    lustre_swab_obdo);
 896         }
 897
 898         rc = obd_set_info(exp, keylen, key, req->rq_reqmsg->buflens[1], val);
 899         req->rq_repmsg->status = 0;
 900         RETURN(rc);
 901 }
 902
 903 static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
 904 {
 905         char *key;
 906         int keylen, rc = 0, size = sizeof(obd_id);
 907         obd_id *reply;
 908         ENTRY;
 909
 910         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 911         if (key == NULL) {
 912                 DEBUG_REQ(D_HA, req, "no get_info key");
 913                 RETURN(-EFAULT);
 914         }
 915         keylen = req->rq_reqmsg->buflens[0];
 916
 917         if (keylen < strlen("last_id") || memcmp(key, "last_id", 7) != 0)
 918                 RETURN(-EPROTO);
 919
 920         rc = lustre_pack_reply(req, 1, &size, NULL);
 921         if (rc)
 922                 RETURN(rc);
 923
 924         reply = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply));
 925         rc = obd_get_info(exp, keylen, key, (__u32 *)&size, reply);
 926         req->rq_repmsg->status = 0;
 927         RETURN(rc);
 928 }
 929
 930 static int ost_llog_handle_connect(struct obd_export *exp,
 931                                    struct ptlrpc_request *req)
 932 {
 933         struct llogd_conn_body *body;
 934         int rc;
 935         ENTRY;
 936
 937         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
 938         rc = obd_llog_connect(exp, body);
 939         RETURN(rc);
 940 }
 941
 942 static int ost_filter_recovery_request(struct ptlrpc_request *req,
 943                                        struct obd_device *obd, int *process)
 944 {
 945         switch (req->rq_reqmsg->opc) {
 946         case OST_CONNECT: /* This will never get here, but for completeness. */
 947         case OST_DISCONNECT:
 948                *process = 1;
 949                RETURN(0);
 950
 951         case OBD_PING:
 952         case OST_CREATE:
 953         case OST_DESTROY:
 954         case OST_PUNCH:
 955         case OST_SETATTR:
 956         case OST_SYNC:
 957         case OST_WRITE:
 958         case OBD_LOG_CANCEL:
 959         case LDLM_ENQUEUE:
 960                 *process = target_queue_recovery_request(req, obd);
 961                 RETURN(0);
 962
 963         default:
 964                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
 965                 *process = 0;
 966                 /* XXX what should we set rq_status to here? */
 967                 req->rq_status = -EAGAIN;
 968                 RETURN(ptlrpc_error(req));
 969         }
 970 }
 971
 972 int ost_msg_check_version(struct lustre_msg *msg)
 973 {
 974         int rc;
 975
 976         switch(msg->opc) {
 977         case OST_CONNECT:
 978         case OST_DISCONNECT:
 979         case OBD_PING:
 980         case OST_CREATE:
 981         case OST_DESTROY:
 982         case OST_GETATTR:
 983         case OST_SETATTR:
 984         case OST_WRITE:
 985         case OST_READ:
 986         case OST_SAN_READ:
 987         case OST_SAN_WRITE:
 988         case OST_PUNCH:
 989         case OST_STATFS:
 990         case OST_SYNC:
 991         case OST_SET_INFO:
 992         case OST_GET_INFO:
 993                 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
 994                 if (rc)
 995                         CERROR("bad opc %u version %08x, expecting %08x\n",
 996                                msg->opc, msg->version, LUSTRE_OBD_VERSION);
 997                 break;
 998         case LDLM_ENQUEUE:
 999         case LDLM_CONVERT:
1000         case LDLM_CANCEL:
1001         case LDLM_BL_CALLBACK:
1002         case LDLM_CP_CALLBACK:
1003                 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
1004                 if (rc)
1005                         CERROR("bad opc %u version %08x, expecting %08x\n",
1006                                msg->opc, msg->version, LUSTRE_DLM_VERSION);
1007                 break;
1008         case OBD_LOG_CANCEL:
1009         case LLOG_ORIGIN_CONNECT:
1010                 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
1011                 if (rc)
1012                         CERROR("bad opc %u version %08x, expecting %08x\n",
1013                                msg->opc, msg->version, LUSTRE_LOG_VERSION);
1014                 break;
1015         case SEC_INIT:
1016         case SEC_INIT_CONTINUE:
1017         case SEC_FINI:
1018                 rc = 0;
1019                 break;
1020         default:
1021                 CERROR("OST unexpected opcode %d\n", msg->opc);
1022                 rc = -ENOTSUPP;
1023                 break;
1024         }
1025         return rc;
1026 }
1027
1028 int ost_handle(struct ptlrpc_request *req)
1029 {
1030         int should_process, fail = OBD_FAIL_OST_ALL_REPLY_NET, rc = 0;
1031         struct obd_trans_info *oti = NULL;
1032         struct obd_device *obd = NULL;
1033         ENTRY;
1034
1035         LASSERT(current->journal_info == NULL);
1036
1037         rc = ost_msg_check_version(req->rq_reqmsg);
1038         if (rc) {
1039                 CERROR("OST drop mal-formed request\n");
1040                 RETURN(rc);
1041         }
1042
1043         /* Security opc should NOT trigger any recovery events */
1044         if (req->rq_reqmsg->opc == SEC_INIT ||
1045             req->rq_reqmsg->opc == SEC_INIT_CONTINUE ||
1046             req->rq_reqmsg->opc == SEC_FINI) {
1047                 GOTO(out_check_req, rc = 0);
1048         }
1049
1050         /* XXX identical to MDS */
1051         if (req->rq_reqmsg->opc != OST_CONNECT) {
1052                 int recovering;
1053
1054                 if (req->rq_export == NULL) {
1055                         CDEBUG(D_HA,"operation %d on unconnected OST from %s\n",
1056                                req->rq_reqmsg->opc,
1057                                req->rq_peerstr);
1058                         req->rq_status = -ENOTCONN;
1059                         GOTO(out_check_req, rc = -ENOTCONN);
1060                 }
1061
1062                 obd = req->rq_export->exp_obd;
1063
1064                 /* Check for aborted recovery. */
1065                 spin_lock_bh(&obd->obd_processing_task_lock);
1066                 recovering = obd->obd_recovering;
1067                 spin_unlock_bh(&obd->obd_processing_task_lock);
1068                 if (recovering) {
1069                         rc = ost_filter_recovery_request(req, obd,
1070                                                          &should_process);
1071                         if (rc || !should_process)
1072                                 RETURN(rc);
1073                         if (should_process < 0) {
1074                                 req->rq_status = should_process;
1075                                 rc = ptlrpc_error(req);
1076                                 RETURN(rc);
1077                         }
1078                 }
1079         }
1080
1081         OBD_ALLOC(oti, sizeof(*oti));
1082         if (oti == NULL)
1083                 RETURN(-ENOMEM);
1084
1085         oti_init(oti, req);
1086
1087         switch (req->rq_reqmsg->opc) {
1088         case OST_CONNECT: {
1089                 CDEBUG(D_INODE, "connect\n");
1090                 OBD_FAIL_GOTO(OBD_FAIL_OST_CONNECT_NET, out_free_oti, rc = 0);
1091                 rc = target_handle_connect(req);
1092                 if (!rc)
1093                         obd = req->rq_export->exp_obd;
1094                 break;
1095         }
1096         case OST_DISCONNECT:
1097                 CDEBUG(D_INODE, "disconnect\n");
1098                 OBD_FAIL_GOTO(OBD_FAIL_OST_DISCONNECT_NET, out_free_oti, rc = 0);
1099                 rc = target_handle_disconnect(req);
1100                 break;
1101         case OST_CREATE:
1102                 CDEBUG(D_INODE, "create\n");
1103                 OBD_FAIL_GOTO(OBD_FAIL_OST_ENOSPC, out_check_req, rc = -ENOSPC);
1104                 OBD_FAIL_GOTO(OBD_FAIL_OST_EROFS, out_check_req, rc = -EROFS);
1105                 OBD_FAIL_GOTO(OBD_FAIL_OST_CREATE_NET, out_free_oti, rc = 0);
1106                 rc = ost_create(req->rq_export, req, oti);
1107                 break;
1108         case OST_DESTROY:
1109                 CDEBUG(D_INODE, "destroy\n");
1110                 OBD_FAIL_GOTO(OBD_FAIL_OST_DESTROY_NET, out_free_oti, rc = 0);
1111                 OBD_FAIL_GOTO(OBD_FAIL_OST_EROFS, out_check_req, rc = -EROFS);
1112                 rc = ost_destroy(req->rq_export, req, oti);
1113                 break;
1114         case OST_GETATTR:
1115                 CDEBUG(D_INODE, "getattr\n");
1116                 OBD_FAIL_GOTO(OBD_FAIL_OST_GETATTR_NET, out_free_oti, rc = 0);
1117                 rc = ost_getattr(req->rq_export, req);
1118                 break;
1119         case OST_SETATTR:
1120                 CDEBUG(D_INODE, "setattr\n");
1121                 OBD_FAIL_GOTO(OBD_FAIL_OST_SETATTR_NET, out_free_oti, rc = 0);
1122                 rc = ost_setattr(req->rq_export, req, oti);
1123                 break;
1124         case OST_WRITE:
1125                 CDEBUG(D_INODE, "write\n");
1126                 OBD_FAIL_GOTO(OBD_FAIL_OST_BRW_NET, out_free_oti, rc = 0);
1127                 OBD_FAIL_GOTO(OBD_FAIL_OST_ENOSPC, out_check_req, rc = -ENOSPC);
1128                 OBD_FAIL_GOTO(OBD_FAIL_OST_EROFS, out_check_req, rc = -EROFS);
1129                 rc = ost_brw_write(req, oti);
1130                 LASSERT(current->journal_info == NULL);
1131                 /* ost_brw sends its own replies */
1132                 GOTO(out_free_oti, rc);
1133         case OST_READ:
1134                 CDEBUG(D_INODE, "read\n");
1135                 OBD_FAIL_GOTO(OBD_FAIL_OST_BRW_NET, out_free_oti, rc = 0);
1136                 rc = ost_brw_read(req);
1137                 LASSERT(current->journal_info == NULL);
1138                 /* ost_brw sends its own replies */
1139                 GOTO(out_free_oti, rc);
1140         case OST_SAN_READ:
1141                 CDEBUG(D_INODE, "san read\n");
1142                 OBD_FAIL_GOTO(OBD_FAIL_OST_BRW_NET, out_free_oti, rc = 0);
1143                 rc = ost_san_brw(req, OBD_BRW_READ);
1144                 /* ost_san_brw sends its own replies */
1145                 GOTO(out_free_oti, rc);
1146         case OST_SAN_WRITE:
1147                 CDEBUG(D_INODE, "san write\n");
1148                 OBD_FAIL_GOTO(OBD_FAIL_OST_BRW_NET, out_free_oti, rc = 0);
1149                 rc = ost_san_brw(req, OBD_BRW_WRITE);
1150                 /* ost_san_brw sends its own replies */
1151                 GOTO(out_free_oti, rc);
1152         case OST_PUNCH:
1153                 CDEBUG(D_INODE, "punch\n");
1154                 OBD_FAIL_GOTO(OBD_FAIL_OST_PUNCH_NET, out_free_oti, rc = 0);
1155                 OBD_FAIL_GOTO(OBD_FAIL_OST_EROFS, out_check_req, rc = -EROFS);
1156                 rc = ost_punch(req->rq_export, req, oti);
1157                 break;
1158         case OST_STATFS:
1159                 CDEBUG(D_INODE, "statfs\n");
1160                 OBD_FAIL_GOTO(OBD_FAIL_OST_STATFS_NET, out_free_oti, rc = 0);
1161                 rc = ost_statfs(req);
1162                 break;
1163         case OST_SYNC:
1164                 CDEBUG(D_INODE, "sync\n");
1165                 OBD_FAIL_GOTO(OBD_FAIL_OST_SYNC_NET, out_free_oti, rc = 0);
1166                 rc = ost_sync(req->rq_export, req);
1167                 break;
1168         case OST_SET_INFO:
1169                 DEBUG_REQ(D_INODE, req, "set_info");
1170                 rc = ost_set_info(req->rq_export, req);
1171                 break;
1172         case OST_GET_INFO:
1173                 DEBUG_REQ(D_INODE, req, "get_info");
1174                 rc = ost_get_info(req->rq_export, req);
1175                 break;
1176         case OBD_PING:
1177                 DEBUG_REQ(D_INODE, req, "ping");
1178                 rc = target_handle_ping(req);
1179                 break;
1180         /* FIXME - just reply status */
1181         case LLOG_ORIGIN_CONNECT:
1182                 DEBUG_REQ(D_INODE, req, "log connect\n");
1183                 rc = ost_llog_handle_connect(req->rq_export, req);
1184                 req->rq_status = rc;
1185                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1186                 if (rc)
1187                         GOTO(out_free_oti, rc);
1188                 GOTO(out_free_oti, rc = ptlrpc_reply(req));
1189         case OBD_LOG_CANCEL:
1190                 CDEBUG(D_INODE, "log cancel\n");
1191                 OBD_FAIL_GOTO(OBD_FAIL_OBD_LOG_CANCEL_NET, out_free_oti, rc = 0);
1192                 rc = llog_origin_handle_cancel(req);
1193                 req->rq_status = rc;
1194                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1195                 if (rc)
1196                         GOTO(out_free_oti, rc);
1197                 GOTO(out_free_oti, rc = ptlrpc_reply(req));
1198         case LDLM_ENQUEUE:
1199                 CDEBUG(D_INODE, "enqueue\n");
1200                 OBD_FAIL_GOTO(OBD_FAIL_LDLM_ENQUEUE, out_free_oti, rc = 0);
1201                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1202                                          ldlm_server_blocking_ast,
1203                                          ldlm_server_glimpse_ast);
1204                 fail = OBD_FAIL_OST_LDLM_REPLY_NET;
1205                 break;
1206         case LDLM_CONVERT:
1207                 CDEBUG(D_INODE, "convert\n");
1208                 OBD_FAIL_GOTO(OBD_FAIL_LDLM_CONVERT, out_free_oti, rc = 0);
1209                 rc = ldlm_handle_convert(req);
1210                 break;
1211         case LDLM_CANCEL:
1212                 CDEBUG(D_INODE, "cancel\n");
1213                 OBD_FAIL_GOTO(OBD_FAIL_LDLM_CANCEL, out_free_oti, rc = 0);
1214                 rc = ldlm_handle_cancel(req);
1215                 break;
1216         case LDLM_BL_CALLBACK:
1217         case LDLM_CP_CALLBACK:
1218                 CDEBUG(D_INODE, "callback\n");
1219                 CERROR("callbacks should not happen on OST\n");
1220                 /* fall through */
1221         default:
1222                 CERROR("Unexpected opcode %d\n", req->rq_reqmsg->opc);
1223                 req->rq_status = -ENOTSUPP;
1224                 rc = ptlrpc_error(req);
1225                 GOTO(out_free_oti, rc);
1226         }
1227
1228         LASSERT(current->journal_info == NULL);
1229
1230         EXIT;
1231         /* If we're DISCONNECTing, the export_data is already freed */
1232         if (!rc && req->rq_reqmsg->opc != OST_DISCONNECT) {
1233                 if (!obd->obd_no_transno) {
1234                         req->rq_repmsg->last_committed =
1235                                 obd->obd_last_committed;
1236                 } else {
1237                         DEBUG_REQ(D_IOCTL, req,
1238                                   "not sending last_committed update");
1239                 }
1240                 CDEBUG(D_INFO, "last_committed "LPU64", xid "LPX64"\n",
1241                        obd->obd_last_committed, req->rq_xid);
1242         }
1243
1244 out_check_req:
1245
1246         if (!rc)
1247                 oti_to_request(oti, req);
1248         target_send_reply(req, rc, fail);
1249         rc = 0;
1250
1251 out_free_oti:
1252         if (oti)
1253                 OBD_FREE(oti, sizeof(*oti));
1254         return rc;
1255 }
1256 EXPORT_SYMBOL(ost_handle);
1257
1258 int ost_attach(struct obd_device *dev, obd_count len, void *data)
1259 {
1260         struct lprocfs_static_vars lvars;
1261
1262         lprocfs_init_vars(ost,&lvars);
1263         return lprocfs_obd_attach(dev, lvars.obd_vars);
1264 }
1265
1266 int ost_detach(struct obd_device *dev)
1267 {
1268         return lprocfs_obd_detach(dev);
1269 }
1270
1271 extern struct file_operations ost_stimes_fops;
1272
1273 static int ost_setup(struct obd_device *obd, obd_count len, void *buf)
1274 {
1275         struct ost_obd *ost = &obd->u.ost;
1276         int rc;
1277         ENTRY;
1278
1279         rc = cleanup_group_info();
1280         if (rc)
1281                 RETURN(rc);
1282
1283         rc = llog_start_commit_thread();
1284         if (rc < 0)
1285                 RETURN(rc);
1286
1287         lprocfs_obd_seq_create(obd, "service_times", 0444, &ost_stimes_fops,
1288                                obd);
1289
1290         ost->ost_service =
1291                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
1292                                 OST_REQUEST_PORTAL, OSC_REPLY_PORTAL, 30000,
1293                                 ost_handle, "ost",
1294                                 obd->obd_proc_entry);
1295         if (ost->ost_service == NULL) {
1296                 CERROR("failed to start service\n");
1297                 RETURN(-ENOMEM);
1298         }
1299
1300         rc = ptlrpc_start_n_threads(obd, ost->ost_service, OST_NUM_THREADS,
1301                                     "ll_ost");
1302         if (rc)
1303                 GOTO(out_service, rc = -EINVAL);
1304
1305         ost->ost_create_service =
1306                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
1307                                 OST_CREATE_PORTAL, OSC_REPLY_PORTAL, 30000,
1308                                 ost_handle, "ost_create",
1309                                 obd->obd_proc_entry);
1310         if (ost->ost_create_service == NULL) {
1311                 CERROR("failed to start OST create service\n");
1312                 GOTO(out_service, rc = -ENOMEM);
1313         }
1314
1315
1316         spin_lock_init(&ost->ost_lock);
1317         ost->ost_service->srv_obddev = obd;
1318
1319         rc = ptlrpc_start_n_threads(obd, ost->ost_create_service, 1,
1320                                     "ll_ost_creat");
1321         if (rc)
1322                 GOTO(out_create, rc = -EINVAL);
1323
1324         ost->ost_destroy_service =
1325                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
1326                                 OST_DESTROY_PORTAL, OSC_REPLY_PORTAL, 30000,
1327                                 ost_handle, "ost_destroy",
1328                                 obd->obd_proc_entry);
1329         if (ost->ost_destroy_service == NULL) {
1330                 CERROR("failed to start service\n");
1331                 GOTO(out_create, rc = -ENOMEM);
1332         }
1333
1334         rc = ptlrpc_start_n_threads(obd, ost->ost_destroy_service,
1335                                     OST_NUM_THREADS, "ll_dstr_ost");
1336         if (rc)
1337                 GOTO(out_destroy, rc = -EINVAL);
1338
1339         RETURN(0);
1340
1341 out_destroy:
1342         ptlrpc_unregister_service(ost->ost_destroy_service);
1343 out_create:
1344         ptlrpc_unregister_service(ost->ost_create_service);
1345 out_service:
1346         ptlrpc_unregister_service(ost->ost_service);
1347         RETURN(rc);
1348 }
1349
1350 extern void lgss_svc_cache_purge_all(void);
1351 static int ost_cleanup(struct obd_device *obd, int flags)
1352 {
1353         struct ost_obd *ost = &obd->u.ost;
1354         int err = 0;
1355         ENTRY;
1356
1357         spin_lock_bh(&obd->obd_processing_task_lock);
1358         if (obd->obd_recovering) {
1359                 target_cancel_recovery_timer(obd);
1360                 obd->obd_recovering = 0;
1361         }
1362         spin_unlock_bh(&obd->obd_processing_task_lock);
1363
1364         ptlrpc_stop_all_threads(ost->ost_service);
1365         ptlrpc_unregister_service(ost->ost_service);
1366
1367         ptlrpc_stop_all_threads(ost->ost_create_service);
1368         ptlrpc_unregister_service(ost->ost_create_service);
1369
1370         ptlrpc_stop_all_threads(ost->ost_destroy_service);
1371         ptlrpc_unregister_service(ost->ost_destroy_service);
1372
1373 #ifdef ENABLE_GSS
1374         /* XXX */
1375         lgss_svc_cache_purge_all();
1376 #endif
1377         RETURN(err);
1378 }
1379
1380 /* use obd ops to offer management infrastructure */
1381 static struct obd_ops ost_obd_ops = {
1382         .o_owner        = THIS_MODULE,
1383         .o_attach       = ost_attach,
1384         .o_detach       = ost_detach,
1385         .o_setup        = ost_setup,
1386         .o_cleanup      = ost_cleanup,
1387 };
1388
1389 static int __init ost_init(void)
1390 {
1391         struct lprocfs_static_vars lvars;
1392         ENTRY;
1393
1394         lprocfs_init_vars(ost,&lvars);
1395         RETURN(class_register_type(&ost_obd_ops, NULL, lvars.module_vars,
1396                                    OBD_OST_DEVICENAME));
1397 }
1398
1399 static void /*__exit*/ ost_exit(void)
1400 {
1401         class_unregister_type(OBD_OST_DEVICENAME);
1402 }
1403
1404 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1405 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
1406 MODULE_LICENSE("GPL");
1407
1408 module_init(ost_init);
1409 module_exit(ost_exit);