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         oti->oti_nid = req->rq_peer.peer_id.nid;
  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         struct lustre_capa *capa = NULL;
 170         int rc, size = sizeof(*repbody);
 171         ENTRY;
 172
 173         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 174         if (body == NULL)
 175                 RETURN(-EFAULT);
 176
 177         if ((body->oa.o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
 178             (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
 179                 RETURN(-EINVAL);
 180
 181         if (body->oa.o_valid & OBD_MD_CAPA) {
 182                 capa = lustre_swab_reqbuf(req, 1, sizeof(*capa),
 183                                           lustre_swab_lustre_capa);
 184                 if (capa == NULL) {
 185                         CERROR("Missing/short capa\n");
 186                         RETURN(-EFAULT);
 187                 }
 188         }
 189
 190         rc = lustre_pack_reply(req, 1, &size, NULL);
 191         if (rc)
 192                 RETURN(rc);
 193
 194         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 195         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 196         req->rq_status = obd_punch(exp, &repbody->oa, NULL, repbody->oa.o_size,
 197                                    repbody->oa.o_blocks, oti, capa);
 198         RETURN(0);
 199 }
 200
 201 static int ost_sync(struct obd_export *exp, struct ptlrpc_request *req)
 202 {
 203         struct ost_body *body, *repbody;
 204         int rc, size = sizeof(*repbody);
 205         ENTRY;
 206
 207         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 208         if (body == NULL)
 209                 RETURN(-EFAULT);
 210
 211         rc = lustre_pack_reply(req, 1, &size, NULL);
 212         if (rc)
 213                 RETURN(rc);
 214
 215         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 216         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 217         req->rq_status = obd_sync(exp, &repbody->oa, NULL, repbody->oa.o_size,
 218                                   repbody->oa.o_blocks);
 219         RETURN(0);
 220 }
 221
 222 static int ost_setattr(struct obd_export *exp, struct ptlrpc_request *req,
 223                        struct obd_trans_info *oti)
 224 {
 225         struct ost_body *body, *repbody;
 226         int rc, size = sizeof(*repbody);
 227         ENTRY;
 228
 229         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 230         if (body == NULL)
 231                 RETURN(-EFAULT);
 232
 233         rc = lustre_pack_reply(req, 1, &size, NULL);
 234         if (rc)
 235                 RETURN(rc);
 236
 237         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 238         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 239
 240         req->rq_status = obd_setattr(exp, &repbody->oa, NULL, oti, NULL);
 241         RETURN(0);
 242 }
 243
 244 static int ost_bulk_timeout(void *data)
 245 {
 246         ENTRY;
 247         /* We don't fail the connection here, because having the export
 248          * killed makes the (vital) call to commitrw very sad.
 249          */
 250         RETURN(1);
 251 }
 252
 253 static int get_per_page_niobufs(struct obd_ioobj *ioo, int nioo,
 254                                 struct niobuf_remote *rnb, int nrnb,
 255                                 struct niobuf_remote **pp_rnbp)
 256 {
 257         /* Copy a remote niobuf, splitting it into page-sized chunks
 258          * and setting ioo[i].ioo_bufcnt accordingly */
 259         struct niobuf_remote *pp_rnb;
 260         int   i;
 261         int   j;
 262         int   page;
 263         int   rnbidx = 0;
 264         int   npages = 0;
 265
 266         /* first count and check the number of pages required */
 267         for (i = 0; i < nioo; i++)
 268                 for (j = 0; j < ioo->ioo_bufcnt; j++, rnbidx++) {
 269                         obd_off offset = rnb[rnbidx].offset;
 270                         obd_off p0 = offset >> PAGE_SHIFT;
 271                         obd_off pn = (offset + rnb[rnbidx].len - 1)>>PAGE_SHIFT;
 272
 273                         LASSERT(rnbidx < nrnb);
 274
 275                         npages += (pn + 1 - p0);
 276
 277                         if (rnb[rnbidx].len == 0) {
 278                                 CERROR("zero len BRW: obj %d objid "LPX64
 279                                        " buf %u\n", i, ioo[i].ioo_id, j);
 280                                 return -EINVAL;
 281                         }
 282                         if (j > 0 &&
 283                             rnb[rnbidx].offset <= rnb[rnbidx-1].offset) {
 284                                 CERROR("unordered BRW: obj %d objid "LPX64
 285                                        " buf %u offset "LPX64" <= "LPX64"\n",
 286                                        i, ioo[i].ioo_id, j, rnb[rnbidx].offset,
 287                                        rnb[rnbidx].offset);
 288                                 return -EINVAL;
 289                         }
 290                 }
 291
 292         LASSERT(rnbidx == nrnb);
 293
 294         if (npages == nrnb) {       /* all niobufs are for single pages */
 295                 *pp_rnbp = rnb;
 296                 return npages;
 297         }
 298
 299         OBD_ALLOC(pp_rnb, sizeof(*pp_rnb) * npages);
 300         if (pp_rnb == NULL)
 301                 return -ENOMEM;
 302
 303         /* now do the actual split */
 304         page = rnbidx = 0;
 305         for (i = 0; i < nioo; i++) {
 306                 int  obj_pages = 0;
 307
 308                 for (j = 0; j < ioo[i].ioo_bufcnt; j++, rnbidx++) {
 309                         obd_off off = rnb[rnbidx].offset;
 310                         int     nob = rnb[rnbidx].len;
 311
 312                         LASSERT(rnbidx < nrnb);
 313                         do {
 314                                 obd_off  poff = off & (PAGE_SIZE - 1);
 315                                 int      pnob = (poff + nob > PAGE_SIZE) ?
 316                                                 PAGE_SIZE - poff : nob;
 317
 318                                 LASSERT(page < npages);
 319                                 pp_rnb[page].len = pnob;
 320                                 pp_rnb[page].offset = off;
 321                                 pp_rnb[page].flags = rnb[rnbidx].flags;
 322
 323                                 CDEBUG(0, "   obj %d id "LPX64
 324                                        "page %d(%d) "LPX64" for %d, flg %x\n",
 325                                        i, ioo[i].ioo_id, obj_pages, page,
 326                                        pp_rnb[page].offset, pp_rnb[page].len,
 327                                        pp_rnb[page].flags);
 328                                 page++;
 329                                 obj_pages++;
 330
 331                                 off += pnob;
 332                                 nob -= pnob;
 333                         } while (nob > 0);
 334                         LASSERT(nob == 0);
 335                 }
 336                 ioo[i].ioo_bufcnt = obj_pages;
 337         }
 338         LASSERT(page == npages);
 339
 340         *pp_rnbp = pp_rnb;
 341         return npages;
 342 }
 343
 344 static void free_per_page_niobufs (int npages, struct niobuf_remote *pp_rnb,
 345                                    struct niobuf_remote *rnb)
 346 {
 347         if (pp_rnb == rnb)                      /* didn't allocate above */
 348                 return;
 349
 350         OBD_FREE(pp_rnb, sizeof(*pp_rnb) * npages);
 351 }
 352
 353 #if CHECKSUM_BULK
 354 obd_count ost_checksum_bulk(struct ptlrpc_bulk_desc *desc)
 355 {
 356         obd_count cksum = 0;
 357         struct ptlrpc_bulk_page *bp;
 358
 359         list_for_each_entry(bp, &desc->bd_page_list, bp_link) {
 360                 ost_checksum(&cksum, kmap(bp->bp_page) + bp->bp_pageoffset,
 361                              bp->bp_buflen);
 362                 kunmap(bp->bp_page);
 363         }
 364
 365         return cksum;
 366 }
 367 #endif
 368
 369 static void ost_stime_record(struct ptlrpc_request *req, struct timeval *start,
 370                              unsigned rw, unsigned phase)
 371 {
 372         struct obd_device *obd = req->rq_svc->srv_obddev;
 373         struct timeval stop;
 374         int ind = rw *3 + phase;
 375
 376         if (obd && obd->obd_type && obd->obd_type->typ_name) {
 377                 if (!strcmp(obd->obd_type->typ_name, OBD_OST_DEVICENAME)) {
 378                         struct ost_obd *ost = NULL;
 379
 380                         ost = &obd->u.ost;
 381                         if (ind >= (sizeof(ost->ost_stimes) /
 382                                     sizeof(ost->ost_stimes[0])))
 383                                return;
 384                         do_gettimeofday(&stop);
 385
 386                         spin_lock(&ost->ost_lock);
 387                         lprocfs_stime_record(&ost->ost_stimes[ind],&stop,start);
 388                         spin_unlock(&ost->ost_lock);
 389                         memcpy(start, &stop, sizeof(*start));
 390                 }
 391        }
 392 }
 393
 394 static int ost_brw_read(struct ptlrpc_request *req)
 395 {
 396         struct ptlrpc_bulk_desc *desc;
 397         struct niobuf_remote    *remote_nb;
 398         struct niobuf_remote    *pp_rnb;
 399         struct niobuf_local     *local_nb;
 400         struct obd_ioobj        *ioo;
 401         struct ost_body         *body, *repbody;
 402         struct lustre_capa      *capa = NULL;
 403         struct l_wait_info       lwi;
 404         struct obd_trans_info    oti = { 0 };
 405         int                      size[1] = { sizeof(*body) };
 406         int                      comms_error = 0;
 407         int                      niocount;
 408         int                      npages;
 409         int                      nob = 0;
 410         int                      rc;
 411         int                      i, bufcnt = 0;
 412         struct timeval           start;
 413         ENTRY;
 414
 415         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
 416                 GOTO(out, rc = -EIO);
 417
 418         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 419                          (obd_timeout + 1) / 4);
 420
 421         body = lustre_swab_reqbuf(req, bufcnt++, sizeof(*body),
 422                                   lustre_swab_ost_body);
 423         if (body == NULL) {
 424                 CERROR("Missing/short ost_body\n");
 425                 GOTO(out, rc = -EFAULT);
 426         }
 427
 428         ioo = lustre_swab_reqbuf(req, bufcnt++, sizeof(*ioo),
 429                                  lustre_swab_obd_ioobj);
 430         if (ioo == NULL) {
 431                 CERROR("Missing/short ioobj\n");
 432                 GOTO(out, rc = -EFAULT);
 433         }
 434
 435         if (body->oa.o_valid & OBD_MD_CAPA) {
 436                 capa = lustre_swab_reqbuf(req, bufcnt++, sizeof(*capa),
 437                                           lustre_swab_lustre_capa);
 438                 if (capa == NULL) {
 439                         CERROR("Missing/short capa\n");
 440                         GOTO(out, rc = -EFAULT);
 441                 }
 442         }
 443
 444         niocount = ioo->ioo_bufcnt;
 445         remote_nb = lustre_swab_reqbuf(req, bufcnt++,
 446                                        niocount * sizeof(*remote_nb),
 447                                        lustre_swab_niobuf_remote);
 448         if (remote_nb == NULL) {
 449                 CERROR("Missing/short niobuf\n");
 450                 GOTO(out, rc = -EFAULT);
 451         }
 452         if (lustre_msg_swabbed(req->rq_reqmsg)) { /* swab remaining niobufs */
 453                 for (i = 1; i < niocount; i++)
 454                         lustre_swab_niobuf_remote (&remote_nb[i]);
 455         }
 456
 457         rc = lustre_pack_reply(req, 1, size, NULL);
 458         if (rc)
 459                 GOTO(out, rc);
 460
 461         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 462         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 463         npages = get_per_page_niobufs(ioo, 1, remote_nb, niocount, &pp_rnb);
 464         if (npages < 0)
 465                 GOTO(out, rc = npages);
 466
 467         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 468         if (local_nb == NULL)
 469                 GOTO(out_pp_rnb, rc = -ENOMEM);
 470
 471         desc = ptlrpc_prep_bulk_exp (req, npages,
 472                                      BULK_PUT_SOURCE, OST_BULK_PORTAL);
 473         if (desc == NULL)
 474                 GOTO(out_local, rc = -ENOMEM);
 475
 476         do_gettimeofday(&start);
 477         rc = obd_preprw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 478                         ioo, npages, pp_rnb, local_nb, &oti, capa);
 479         ost_stime_record(req, &start, 0, 0);
 480         if (rc != 0)
 481                 GOTO(out_bulk, rc);
 482
 483         /* We're finishing using body->oa as an input variable */
 484         body->oa.o_valid = 0;
 485
 486         nob = 0;
 487         for (i = 0; i < npages; i++) {
 488                 int page_rc = local_nb[i].rc;
 489
 490                 if (page_rc < 0) {              /* error */
 491                         rc = page_rc;
 492                         break;
 493                 }
 494
 495                 LASSERT(page_rc <= pp_rnb[i].len);
 496                 nob += page_rc;
 497                 if (page_rc != 0) {             /* some data! */
 498                         LASSERT (local_nb[i].page != NULL);
 499                         ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 500                                               pp_rnb[i].offset & (PAGE_SIZE-1),
 501                                               page_rc);
 502                 }
 503
 504                 if (page_rc != pp_rnb[i].len) { /* short read */
 505                         /* All subsequent pages should be 0 */
 506                         while(++i < npages)
 507                                 LASSERT(local_nb[i].rc == 0);
 508                         break;
 509                 }
 510         }
 511
 512         if (rc == 0) {
 513                 rc = ptlrpc_start_bulk_transfer(desc);
 514                 if (rc == 0) {
 515                         struct timeval tstart, now;
 516                         do_gettimeofday(&tstart);
 517                         lwi = LWI_TIMEOUT(obd_timeout * HZ / 3,
 518                                           ost_bulk_timeout, desc);
 519                         rc = l_wait_event(desc->bd_waitq,
 520                                           !ptlrpc_bulk_active(desc), &lwi);
 521                         LASSERT(rc == 0 || rc == -ETIMEDOUT);
 522                         do_gettimeofday(&now);
 523                         if (rc == -ETIMEDOUT) {
 524                                 char cln_str[PTL_NALFMT_SIZE];
 525                                 DEBUG_REQ(D_ERROR, req, "timeout on bulk PUT"
 526                                           ", exp_conn_cnt = %u, real wait %us"
 527                                           ", arrived %u.%u, served %u.%u",
 528                                           req->rq_export->exp_conn_cnt,
 529                                           (unsigned) (now.tv_sec - tstart.tv_sec),
 530                                           (unsigned) req->rq_arrival_time.tv_sec,
 531                                           (unsigned) req->rq_arrival_time.tv_usec,
 532                                           (unsigned) req->rq_rpcd_start.tv_sec,
 533                                           (unsigned) req->rq_rpcd_start.tv_usec);
 534                                 CDEBUG(D_ERROR, "bulk PUT timeout: client %s\n",
 535                                        ptlrpc_peernid2str(&req->rq_peer, cln_str));
 536                                 ptlrpc_abort_bulk(desc);
 537                         } else if (!desc->bd_success ||
 538                                    desc->bd_nob_transferred != desc->bd_nob) {
 539                                 DEBUG_REQ(D_ERROR, req, "%s bulk PUT %d(%d)",
 540                                           desc->bd_success ?
 541                                           "truncated" : "network error on",
 542                                           desc->bd_nob_transferred,
 543                                           desc->bd_nob);
 544                                 /* XXX should this be a different errno? */
 545                                 rc = -ETIMEDOUT;
 546                         }
 547                 } else {
 548                         DEBUG_REQ(D_ERROR, req, "bulk PUT failed: rc %d\n", rc);
 549                 }
 550                 comms_error = rc != 0;
 551         }
 552
 553         ost_stime_record(req, &start, 0, 1);
 554         /* Must commit after prep above in all cases */
 555         rc = obd_commitrw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 556                           ioo, npages, local_nb, &oti, rc);
 557         ost_stime_record(req, &start, 0, 2);
 558
 559         if (rc == 0) {
 560                 repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 561                 memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 562
 563 #if CHECKSUM_BULK
 564                 repbody->oa.o_cksum = ost_checksum_bulk(desc);
 565                 repbody->oa.o_valid |= OBD_MD_FLCKSUM;
 566 #endif
 567         }
 568
 569  out_bulk:
 570         ptlrpc_free_bulk(desc);
 571  out_local:
 572         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 573  out_pp_rnb:
 574         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 575  out:
 576         LASSERT(rc <= 0);
 577         if (rc == 0) {
 578                 req->rq_status = nob;
 579                 ptlrpc_reply(req);
 580         } else if (!comms_error) {
 581                 /* only reply if comms OK */
 582                 req->rq_status = rc;
 583                 ptlrpc_error(req);
 584         } else {
 585                 if (req->rq_reply_state != NULL) {
 586                         /* reply out callback would free */
 587                         lustre_free_reply_state (req->rq_reply_state);
 588                 }
 589                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 590                         CERROR("bulk IO comms error: "
 591                                "evicting %s@%s id %s\n",
 592                                req->rq_export->exp_client_uuid.uuid,
 593                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 594                                req->rq_peerstr);
 595                         ptlrpc_fail_export(req->rq_export);
 596                 } else {
 597                         CERROR("ignoring bulk IO comms error: "
 598                                "client reconnected %s@%s id %s\n",
 599                                req->rq_export->exp_client_uuid.uuid,
 600                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 601                                req->rq_peerstr);
 602                 }
 603         }
 604
 605         RETURN(rc);
 606 }
 607
 608 int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
 609 {
 610         struct ptlrpc_bulk_desc *desc;
 611         struct niobuf_remote    *remote_nb;
 612         struct niobuf_remote    *pp_rnb;
 613         struct niobuf_local     *local_nb;
 614         struct obd_ioobj        *ioo;
 615         struct lustre_capa      *capa = NULL;
 616         struct ost_body         *body, *repbody;
 617         struct l_wait_info       lwi;
 618         __u32                   *rcs;
 619         int                      size[2] = { sizeof(*body) };
 620         int                      objcount, niocount, npages;
 621         int                      comms_error = 0;
 622         int                      rc, swab, i, j, bufcnt = 0;
 623         struct timeval           start;
 624         ENTRY;
 625
 626         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
 627                 GOTO(out, rc = -EIO);
 628
 629         /* pause before transaction has been started */
 630         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 631                          (obd_timeout + 1) / 4);
 632
 633         swab = lustre_msg_swabbed(req->rq_reqmsg);
 634         body = lustre_swab_reqbuf(req, bufcnt++, sizeof(*body),
 635                                   lustre_swab_ost_body);
 636         if (body == NULL) {
 637                 CERROR("Missing/short ost_body\n");
 638                 GOTO(out, rc = -EFAULT);
 639         }
 640
 641         LASSERT_REQSWAB(req, 1);
 642         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 643         if (objcount == 0) {
 644                 CERROR("Missing/short ioobj\n");
 645                 GOTO(out, rc = -EFAULT);
 646         }
 647         ioo = lustre_msg_buf(req->rq_reqmsg, bufcnt++,
 648                              objcount * sizeof(*ioo));
 649         LASSERT (ioo != NULL);
 650         for (niocount = i = 0; i < objcount; i++) {
 651                 if (swab)
 652                         lustre_swab_obd_ioobj (&ioo[i]);
 653                 if (ioo[i].ioo_bufcnt == 0) {
 654                         CERROR("ioo[%d] has zero bufcnt\n", i);
 655                         GOTO(out, rc = -EFAULT);
 656                 }
 657                 niocount += ioo[i].ioo_bufcnt;
 658         }
 659
 660         if (body->oa.o_valid & OBD_MD_CAPA) {
 661                 capa = lustre_swab_reqbuf(req, bufcnt++, sizeof(*capa),
 662                                           lustre_swab_lustre_capa);
 663                 if (capa == NULL) {
 664                         CERROR("Missing/short capa\n");
 665                         GOTO(out, rc = -EFAULT);
 666                 }
 667         }
 668
 669         remote_nb = lustre_swab_reqbuf(req, bufcnt++,
 670                                        niocount * sizeof(*remote_nb),
 671                                        lustre_swab_niobuf_remote);
 672         if (remote_nb == NULL) {
 673                 CERROR("Missing/short niobuf\n");
 674                 GOTO(out, rc = -EFAULT);
 675         }
 676         if (swab) {                             /* swab the remaining niobufs */
 677                 for (i = 1; i < niocount; i++)
 678                         lustre_swab_niobuf_remote (&remote_nb[i]);
 679         }
 680
 681         size[1] = niocount * sizeof(*rcs);
 682         rc = lustre_pack_reply(req, 2, size, NULL);
 683         if (rc != 0)
 684                 GOTO(out, rc);
 685         rcs = lustre_msg_buf(req->rq_repmsg, 1, niocount * sizeof(*rcs));
 686
 687 #if 0
 688         /* Do snap options here*/
 689         rc = obd_do_cow(req->rq_export, ioo, objcount, remote_nb);
 690         if (rc)
 691                 GOTO(out, rc);
 692 #endif
 693
 694         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 695         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 696         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 697         if (npages < 0)
 698                 GOTO(out, rc = npages);
 699
 700         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 701         if (local_nb == NULL)
 702                 GOTO(out_pp_rnb, rc = -ENOMEM);
 703
 704         desc = ptlrpc_prep_bulk_exp (req, npages,
 705                                      BULK_GET_SINK, OST_BULK_PORTAL);
 706         if (desc == NULL)
 707                 GOTO(out_local, rc = -ENOMEM);
 708
 709         do_gettimeofday(&start);
 710         rc = obd_preprw(OBD_BRW_WRITE, req->rq_export, &body->oa, objcount,
 711                         ioo, npages, pp_rnb, local_nb, oti, capa);
 712         ost_stime_record(req, &start, 1, 0);
 713         if (rc != 0)
 714                 GOTO(out_bulk, rc);
 715
 716         /* NB Having prepped, we must commit... */
 717
 718         for (i = 0; i < npages; i++)
 719                 ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 720                                       pp_rnb[i].offset & (PAGE_SIZE - 1),
 721                                       pp_rnb[i].len);
 722
 723         rc = ptlrpc_start_bulk_transfer (desc);
 724         if (rc == 0) {
 725                 struct timeval tstart, now;
 726                 do_gettimeofday(&tstart);
 727                 lwi = LWI_TIMEOUT(obd_timeout * HZ / 3,
 728                                   ost_bulk_timeout, desc);
 729                 rc = l_wait_event(desc->bd_waitq, !ptlrpc_bulk_active(desc),
 730                                   &lwi);
 731                 LASSERT(rc == 0 || rc == -ETIMEDOUT);
 732                 do_gettimeofday(&now);
 733                 if (rc == -ETIMEDOUT) {
 734                         char cln_str[PTL_NALFMT_SIZE];
 735                         DEBUG_REQ(D_ERROR, req, "timeout on bulk GET, "
 736                                   "exp_conn_cnt = %u, real wait %us\n",
 737                                   req->rq_export->exp_conn_cnt,
 738                                   (unsigned) (now.tv_sec - tstart.tv_sec));
 739                         CDEBUG(D_ERROR, "bulk GET timeout: client %s\n",
 740                                ptlrpc_peernid2str(&req->rq_peer, cln_str));
 741                         ptlrpc_abort_bulk(desc);
 742                 } else if (!desc->bd_success ||
 743                            desc->bd_nob_transferred != desc->bd_nob) {
 744                         DEBUG_REQ(D_ERROR, req, "%s bulk GET %d(%d)",
 745                                   desc->bd_success ?
 746                                   "truncated" : "network error on",
 747                                   desc->bd_nob_transferred, desc->bd_nob);
 748                         /* XXX should this be a different errno? */
 749                         rc = -ETIMEDOUT;
 750                 }
 751         } else {
 752                 DEBUG_REQ(D_ERROR, req, "ptlrpc_bulk_get failed: rc %d\n", rc);
 753         }
 754         comms_error = rc != 0;
 755
 756         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 757         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 758
 759 #if CHECKSUM_BULK
 760         if (rc == 0 && (body->oa.o_valid & OBD_MD_FLCKSUM) != 0) {
 761                 static int cksum_counter;
 762                 obd_count client_cksum = body->oa.o_cksum;
 763                 obd_count cksum = ost_checksum_bulk(desc);
 764
 765                 if (client_cksum != cksum) {
 766                         CERROR("Bad checksum: client %x, server %x id %s\n",
 767                                client_cksum, cksum,
 768                                req->rq_peerstr);
 769                         cksum_counter = 1;
 770                         repbody->oa.o_cksum = cksum;
 771                 } else {
 772                         cksum_counter++;
 773                         if ((cksum_counter & (-cksum_counter)) == cksum_counter)
 774                                 CWARN("Checksum %u from NID %s: %x OK\n",
 775                                       cksum_counter, req->rq_peerstr, cksum);
 776                 }
 777         }
 778 #endif
 779         ost_stime_record(req, &start, 1, 1);
 780         /* Must commit after prep above in all cases */
 781         rc = obd_commitrw(OBD_BRW_WRITE, req->rq_export, &repbody->oa,
 782                           objcount, ioo, npages, local_nb, oti, rc);
 783
 784         ost_stime_record(req, &start, 1, 2);
 785         if (rc == 0) {
 786 #if CHECKSUM_BULK
 787                 repbody->oa.o_cksum = ost_checksum_bulk(desc);
 788                 repbody->oa.o_valid |= OBD_MD_FLCKSUM;
 789 #endif
 790                 /* set per-requested niobuf return codes */
 791                 for (i = j = 0; i < niocount; i++) {
 792                         int nob = remote_nb[i].len;
 793
 794                         rcs[i] = 0;
 795                         do {
 796                                 LASSERT(j < npages);
 797                                 if (local_nb[j].rc < 0)
 798                                         rcs[i] = local_nb[j].rc;
 799                                 nob -= pp_rnb[j].len;
 800                                 j++;
 801                         } while (nob > 0);
 802                         LASSERT(nob == 0);
 803                 }
 804                 LASSERT(j == npages);
 805         }
 806         /*XXX This write extents only for write-back cache extents*/
 807         rc = obd_write_extents(req->rq_export, ioo, objcount, niocount,
 808                                local_nb, rc);
 809  out_bulk:
 810         ptlrpc_free_bulk(desc);
 811  out_local:
 812         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 813  out_pp_rnb:
 814         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 815  out:
 816         if (rc == 0) {
 817                 oti_to_request(oti, req);
 818                 rc = ptlrpc_reply(req);
 819         } else if (!comms_error) {
 820                 /* Only reply if there was no comms problem with bulk */
 821                 req->rq_status = rc;
 822                 ptlrpc_error(req);
 823         } else {
 824                 if (req->rq_reply_state != NULL) {
 825                         /* reply out callback would free */
 826                         lustre_free_reply_state (req->rq_reply_state);
 827                 }
 828                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 829                         CERROR("%s: bulk IO comm error evicting %s@%s id %s\n",
 830                                req->rq_export->exp_obd->obd_name,
 831                                req->rq_export->exp_client_uuid.uuid,
 832                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 833                                req->rq_peerstr);
 834                         ptlrpc_fail_export(req->rq_export);
 835                 } else {
 836                         CERROR("ignoring bulk IO comms error: "
 837                                "client reconnected %s@%s id %s\n",
 838                                req->rq_export->exp_client_uuid.uuid,
 839                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 840                                req->rq_peerstr);
 841                 }
 842         }
 843         RETURN(rc);
 844 }
 845 EXPORT_SYMBOL(ost_brw_write);
 846
 847 static int ost_san_brw(struct ptlrpc_request *req, int cmd)
 848 {
 849         struct niobuf_remote *remote_nb, *res_nb, *pp_rnb;
 850         struct obd_ioobj *ioo;
 851         struct ost_body *body, *repbody;
 852         int rc, i, objcount, niocount, size[2] = {sizeof(*body)}, npages;
 853         int swab;
 854         ENTRY;
 855
 856         /* XXX not set to use latest protocol */
 857
 858         swab = lustre_msg_swabbed(req->rq_reqmsg);
 859         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 860         if (body == NULL) {
 861                 CERROR("Missing/short ost_body\n");
 862                 GOTO(out, rc = -EFAULT);
 863         }
 864
 865         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 866         if (ioo == NULL) {
 867                 CERROR("Missing/short ioobj\n");
 868                 GOTO(out, rc = -EFAULT);
 869         }
 870         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 871         niocount = ioo[0].ioo_bufcnt;
 872         for (i = 1; i < objcount; i++) {
 873                 if (swab)
 874                         lustre_swab_obd_ioobj (&ioo[i]);
 875                 niocount += ioo[i].ioo_bufcnt;
 876         }
 877
 878         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 879                                        lustre_swab_niobuf_remote);
 880         if (remote_nb == NULL) {
 881                 CERROR("Missing/short niobuf\n");
 882                 GOTO(out, rc = -EFAULT);
 883         }
 884         if (swab) {                             /* swab the remaining niobufs */
 885                 for (i = 1; i < niocount; i++)
 886                         lustre_swab_niobuf_remote (&remote_nb[i]);
 887         }
 888
 889         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 890         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 891         if (npages < 0)
 892                 GOTO (out, rc = npages);
 893
 894         size[1] = npages * sizeof(*pp_rnb);
 895         rc = lustre_pack_reply(req, 2, size, NULL);
 896         if (rc)
 897                 GOTO(out_pp_rnb, rc);
 898
 899         req->rq_status = obd_san_preprw(cmd, req->rq_export, &body->oa,
 900                                         objcount, ioo, npages, pp_rnb);
 901
 902         if (req->rq_status)
 903                 GOTO(out_pp_rnb, rc = 0);
 904
 905         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 906         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 907
 908         res_nb = lustre_msg_buf(req->rq_repmsg, 1, size[1]);
 909         memcpy(res_nb, remote_nb, size[1]);
 910         rc = 0;
 911 out_pp_rnb:
 912         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 913 out:
 914         if (rc) {
 915                 req->rq_status = rc;
 916                 ptlrpc_error(req);
 917         } else
 918                 ptlrpc_reply(req);
 919
 920         return rc;
 921 }
 922
 923 static int ost_set_info(struct obd_export *exp, struct ptlrpc_request *req)
 924 {
 925         char *key, *val;
 926         int keylen, rc = 0;
 927         ENTRY;
 928
 929         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 930         if (key == NULL) {
 931                 DEBUG_REQ(D_HA, req, "no set_info key");
 932                 RETURN(-EFAULT);
 933         }
 934         keylen = req->rq_reqmsg->buflens[0];
 935
 936         rc = lustre_pack_reply(req, 0, NULL, NULL);
 937         if (rc)
 938                 RETURN(rc);
 939
 940         val = lustre_msg_buf(req->rq_reqmsg, 1, 0);
 941         if (val == NULL) {
 942                 CERROR("val for setinfo can't be NULL\n");
 943                 RETURN(-EFAULT);
 944         }
 945
 946         if (keylen == 8 && memcmp(key, "auditlog", 8) == 0) {
 947                 lustre_swab_reqbuf(req, 1, sizeof(struct audit_msg),
 948                                    lustre_swab_audit_msg);
 949         } else if (keylen == 5 && strcmp(key, "audit") == 0) {
 950                 lustre_swab_reqbuf(req, 1, sizeof(struct audit_attr_msg),
 951                                    lustre_swab_audit_attr);
 952         } else if (keylen == 9 && strcmp(key, "audit_obj") == 0) {
 953                 lustre_swab_reqbuf(req, 1, sizeof(struct obdo),
 954                                    lustre_swab_obdo);
 955         } else if (keylen == 8 && memcmp(key, "capa_key", 8) == 0) {
 956                 lustre_swab_reqbuf(req, 1, sizeof(struct lustre_capa_key),
 957                                    lustre_swab_lustre_capa_key);
 958         }
 959
 960         rc = obd_set_info(exp, keylen, key, req->rq_reqmsg->buflens[1], val);
 961         req->rq_repmsg->status = 0;
 962         RETURN(rc);
 963 }
 964
 965 static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
 966 {
 967         char *key;
 968         int keylen, rc = 0, size = sizeof(obd_id);
 969         obd_id *reply;
 970         ENTRY;
 971
 972         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 973         if (key == NULL) {
 974                 DEBUG_REQ(D_HA, req, "no get_info key");
 975                 RETURN(-EFAULT);
 976         }
 977         keylen = req->rq_reqmsg->buflens[0];
 978
 979         if (keylen < strlen("last_id") || memcmp(key, "last_id", 7) != 0)
 980                 RETURN(-EPROTO);
 981
 982         rc = lustre_pack_reply(req, 1, &size, NULL);
 983         if (rc)
 984                 RETURN(rc);
 985
 986         reply = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply));
 987         rc = obd_get_info(exp, keylen, key, (__u32 *)&size, reply);
 988         req->rq_repmsg->status = 0;
 989         RETURN(rc);
 990 }
 991
 992 static int ost_llog_handle_connect(struct obd_export *exp,
 993                                    struct ptlrpc_request *req)
 994 {
 995         struct llogd_conn_body *body;
 996         int rc;
 997         ENTRY;
 998
 999         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
1000         rc = obd_llog_connect(exp, body);
1001         RETURN(rc);
1002 }
1003
1004 static int ost_filter_recovery_request(struct ptlrpc_request *req,
1005                                        struct obd_device *obd, int *process)
1006 {
1007         switch (req->rq_reqmsg->opc) {
1008         case OST_CONNECT: /* This will never get here, but for completeness. */
1009         case OST_DISCONNECT:
1010                *process = 1;
1011                RETURN(0);
1012
1013         case OBD_PING:
1014         case OST_CREATE:
1015         case OST_DESTROY:
1016         case OST_PUNCH:
1017         case OST_SETATTR:
1018         case OST_SYNC:
1019         case OST_WRITE:
1020         case OBD_LOG_CANCEL:
1021         case LDLM_ENQUEUE:
1022                 *process = target_queue_recovery_request(req, obd);
1023                 RETURN(0);
1024
1025         default:
1026                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
1027                 *process = 0;
1028                 /* XXX what should we set rq_status to here? */
1029                 req->rq_status = -EAGAIN;
1030                 RETURN(ptlrpc_error(req));
1031         }
1032 }
1033
1034 int ost_msg_check_version(struct lustre_msg *msg)
1035 {
1036         int rc;
1037
1038         switch(msg->opc) {
1039         case OST_CONNECT:
1040         case OST_DISCONNECT:
1041         case OBD_PING:
1042         case OST_CREATE:
1043         case OST_DESTROY:
1044         case OST_GETATTR:
1045         case OST_SETATTR:
1046         case OST_WRITE:
1047         case OST_READ:
1048         case OST_SAN_READ:
1049         case OST_SAN_WRITE:
1050         case OST_PUNCH:
1051         case OST_STATFS:
1052         case OST_SYNC:
1053         case OST_SET_INFO:
1054         case OST_GET_INFO:
1055                 rc = lustre_msg_check_version(msg, LUSTRE_OBD_VERSION);
1056                 if (rc)
1057                         CERROR("bad opc %u version %08x, expecting %08x\n",
1058                                msg->opc, msg->version, LUSTRE_OBD_VERSION);
1059                 break;
1060         case LDLM_ENQUEUE:
1061         case LDLM_CONVERT:
1062         case LDLM_CANCEL:
1063         case LDLM_BL_CALLBACK:
1064         case LDLM_CP_CALLBACK:
1065                 rc = lustre_msg_check_version(msg, LUSTRE_DLM_VERSION);
1066                 if (rc)
1067                         CERROR("bad opc %u version %08x, expecting %08x\n",
1068                                msg->opc, msg->version, LUSTRE_DLM_VERSION);
1069                 break;
1070         case OBD_LOG_CANCEL:
1071         case LLOG_ORIGIN_CONNECT:
1072                 rc = lustre_msg_check_version(msg, LUSTRE_LOG_VERSION);
1073                 if (rc)
1074                         CERROR("bad opc %u version %08x, expecting %08x\n",
1075                                msg->opc, msg->version, LUSTRE_LOG_VERSION);
1076                 break;
1077         case SEC_INIT:
1078         case SEC_INIT_CONTINUE:
1079         case SEC_FINI:
1080                 rc = 0;
1081                 break;
1082         default:
1083                 CERROR("OST unexpected opcode %d\n", msg->opc);
1084                 rc = -ENOTSUPP;
1085                 break;
1086         }
1087         return rc;
1088 }
1089
1090 int ost_handle(struct ptlrpc_request *req)
1091 {
1092         int should_process, fail = OBD_FAIL_OST_ALL_REPLY_NET, rc = 0;
1093         struct obd_trans_info *oti = NULL;
1094         struct obd_device *obd = NULL;
1095         ENTRY;
1096
1097         LASSERT(current->journal_info == NULL);
1098
1099         rc = ost_msg_check_version(req->rq_reqmsg);
1100         if (rc) {
1101                 CERROR("OST drop mal-formed request\n");
1102                 RETURN(rc);
1103         }
1104
1105         /* Security opc should NOT trigger any recovery events */
1106         if (req->rq_reqmsg->opc == SEC_INIT ||
1107             req->rq_reqmsg->opc == SEC_INIT_CONTINUE ||
1108             req->rq_reqmsg->opc == SEC_FINI) {
1109                 GOTO(out_check_req, rc = 0);
1110         }
1111
1112         /* XXX identical to MDS */
1113         if (req->rq_reqmsg->opc != OST_CONNECT) {
1114                 int recovering;
1115
1116                 if (req->rq_export == NULL) {
1117                         CDEBUG(D_HA,"operation %d on unconnected OST from %s\n",
1118                                req->rq_reqmsg->opc,
1119                                req->rq_peerstr);
1120                         req->rq_status = -ENOTCONN;
1121                         GOTO(out_check_req, rc = -ENOTCONN);
1122                 }
1123
1124                 obd = req->rq_export->exp_obd;
1125
1126                 /* Check for aborted recovery. */
1127                 spin_lock_bh(&obd->obd_processing_task_lock);
1128                 recovering = obd->obd_recovering;
1129                 spin_unlock_bh(&obd->obd_processing_task_lock);
1130                 if (recovering) {
1131                         rc = ost_filter_recovery_request(req, obd,
1132                                                          &should_process);
1133                         if (rc || !should_process)
1134                                 RETURN(rc);
1135                         if (should_process < 0) {
1136                                 req->rq_status = should_process;
1137                                 rc = ptlrpc_error(req);
1138                                 RETURN(rc);
1139                         }
1140                 }
1141         }
1142
1143         OBD_ALLOC(oti, sizeof(*oti));
1144         if (oti == NULL)
1145                 RETURN(-ENOMEM);
1146
1147         oti_init(oti, req);
1148
1149         switch (req->rq_reqmsg->opc) {
1150         case OST_CONNECT: {
1151                 CDEBUG(D_INODE, "connect\n");
1152                 OBD_FAIL_GOTO(OBD_FAIL_OST_CONNECT_NET, out_free_oti, rc = 0);
1153                 rc = target_handle_connect(req);
1154                 if (!rc)
1155                         obd = req->rq_export->exp_obd;
1156                 break;
1157         }
1158         case OST_DISCONNECT:
1159                 CDEBUG(D_INODE, "disconnect\n");
1160                 OBD_FAIL_GOTO(OBD_FAIL_OST_DISCONNECT_NET, out_free_oti, rc = 0);
1161                 rc = target_handle_disconnect(req);
1162                 break;
1163         case OST_CREATE:
1164                 CDEBUG(D_INODE, "create\n");
1165                 OBD_FAIL_GOTO(OBD_FAIL_OST_ENOSPC, out_check_req, rc = -ENOSPC);
1166                 OBD_FAIL_GOTO(OBD_FAIL_OST_EROFS, out_check_req, rc = -EROFS);
1167                 OBD_FAIL_GOTO(OBD_FAIL_OST_CREATE_NET, out_free_oti, rc = 0);
1168                 rc = ost_create(req->rq_export, req, oti);
1169                 break;
1170         case OST_DESTROY:
1171                 CDEBUG(D_INODE, "destroy\n");
1172                 OBD_FAIL_GOTO(OBD_FAIL_OST_DESTROY_NET, out_free_oti, rc = 0);
1173                 OBD_FAIL_GOTO(OBD_FAIL_OST_EROFS, out_check_req, rc = -EROFS);
1174                 rc = ost_destroy(req->rq_export, req, oti);
1175                 break;
1176         case OST_GETATTR:
1177                 CDEBUG(D_INODE, "getattr\n");
1178                 OBD_FAIL_GOTO(OBD_FAIL_OST_GETATTR_NET, out_free_oti, rc = 0);
1179                 rc = ost_getattr(req->rq_export, req);
1180                 break;
1181         case OST_SETATTR:
1182                 CDEBUG(D_INODE, "setattr\n");
1183                 OBD_FAIL_GOTO(OBD_FAIL_OST_SETATTR_NET, out_free_oti, rc = 0);
1184                 rc = ost_setattr(req->rq_export, req, oti);
1185                 break;
1186         case OST_WRITE:
1187                 CDEBUG(D_INODE, "write\n");
1188                 OBD_FAIL_GOTO(OBD_FAIL_OST_BRW_NET, out_free_oti, rc = 0);
1189                 OBD_FAIL_GOTO(OBD_FAIL_OST_ENOSPC, out_check_req, rc = -ENOSPC);
1190                 OBD_FAIL_GOTO(OBD_FAIL_OST_EROFS, out_check_req, rc = -EROFS);
1191                 rc = ost_brw_write(req, oti);
1192                 LASSERT(current->journal_info == NULL);
1193                 /* ost_brw sends its own replies */
1194                 GOTO(out_free_oti, rc);
1195         case OST_READ:
1196                 CDEBUG(D_INODE, "read\n");
1197                 OBD_FAIL_GOTO(OBD_FAIL_OST_BRW_NET, out_free_oti, rc = 0);
1198                 rc = ost_brw_read(req);
1199                 LASSERT(current->journal_info == NULL);
1200                 /* ost_brw sends its own replies */
1201                 GOTO(out_free_oti, rc);
1202         case OST_SAN_READ:
1203                 CDEBUG(D_INODE, "san read\n");
1204                 OBD_FAIL_GOTO(OBD_FAIL_OST_BRW_NET, out_free_oti, rc = 0);
1205                 rc = ost_san_brw(req, OBD_BRW_READ);
1206                 /* ost_san_brw sends its own replies */
1207                 GOTO(out_free_oti, rc);
1208         case OST_SAN_WRITE:
1209                 CDEBUG(D_INODE, "san write\n");
1210                 OBD_FAIL_GOTO(OBD_FAIL_OST_BRW_NET, out_free_oti, rc = 0);
1211                 rc = ost_san_brw(req, OBD_BRW_WRITE);
1212                 /* ost_san_brw sends its own replies */
1213                 GOTO(out_free_oti, rc);
1214         case OST_PUNCH:
1215                 CDEBUG(D_INODE, "punch\n");
1216                 OBD_FAIL_GOTO(OBD_FAIL_OST_PUNCH_NET, out_free_oti, rc = 0);
1217                 OBD_FAIL_GOTO(OBD_FAIL_OST_EROFS, out_check_req, rc = -EROFS);
1218                 rc = ost_punch(req->rq_export, req, oti);
1219                 break;
1220         case OST_STATFS:
1221                 CDEBUG(D_INODE, "statfs\n");
1222                 OBD_FAIL_GOTO(OBD_FAIL_OST_STATFS_NET, out_free_oti, rc = 0);
1223                 rc = ost_statfs(req);
1224                 break;
1225         case OST_SYNC:
1226                 CDEBUG(D_INODE, "sync\n");
1227                 OBD_FAIL_GOTO(OBD_FAIL_OST_SYNC_NET, out_free_oti, rc = 0);
1228                 rc = ost_sync(req->rq_export, req);
1229                 break;
1230         case OST_SET_INFO:
1231                 DEBUG_REQ(D_INODE, req, "set_info");
1232                 rc = ost_set_info(req->rq_export, req);
1233                 break;
1234         case OST_GET_INFO:
1235                 DEBUG_REQ(D_INODE, req, "get_info");
1236                 rc = ost_get_info(req->rq_export, req);
1237                 break;
1238         case OBD_PING:
1239                 DEBUG_REQ(D_INODE, req, "ping");
1240                 rc = target_handle_ping(req);
1241                 break;
1242         /* FIXME - just reply status */
1243         case LLOG_ORIGIN_CONNECT:
1244                 DEBUG_REQ(D_INODE, req, "log connect\n");
1245                 rc = ost_llog_handle_connect(req->rq_export, req);
1246                 req->rq_status = rc;
1247                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1248                 if (rc)
1249                         GOTO(out_free_oti, rc);
1250                 GOTO(out_free_oti, rc = ptlrpc_reply(req));
1251         case OBD_LOG_CANCEL:
1252                 CDEBUG(D_INODE, "log cancel\n");
1253                 OBD_FAIL_GOTO(OBD_FAIL_OBD_LOG_CANCEL_NET, out_free_oti, rc = 0);
1254                 rc = llog_origin_handle_cancel(req);
1255                 req->rq_status = rc;
1256                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1257                 if (rc)
1258                         GOTO(out_free_oti, rc);
1259                 GOTO(out_free_oti, rc = ptlrpc_reply(req));
1260         case LDLM_ENQUEUE:
1261                 CDEBUG(D_INODE, "enqueue\n");
1262                 OBD_FAIL_GOTO(OBD_FAIL_LDLM_ENQUEUE, out_free_oti, rc = 0);
1263                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1264                                          ldlm_server_blocking_ast,
1265                                          ldlm_server_glimpse_ast);
1266                 fail = OBD_FAIL_OST_LDLM_REPLY_NET;
1267                 break;
1268         case LDLM_CONVERT:
1269                 CDEBUG(D_INODE, "convert\n");
1270                 OBD_FAIL_GOTO(OBD_FAIL_LDLM_CONVERT, out_free_oti, rc = 0);
1271                 rc = ldlm_handle_convert(req);
1272                 break;
1273         case LDLM_CANCEL:
1274                 CDEBUG(D_INODE, "cancel\n");
1275                 OBD_FAIL_GOTO(OBD_FAIL_LDLM_CANCEL, out_free_oti, rc = 0);
1276                 rc = ldlm_handle_cancel(req);
1277                 break;
1278         case LDLM_BL_CALLBACK:
1279         case LDLM_CP_CALLBACK:
1280                 CDEBUG(D_INODE, "callback\n");
1281                 CERROR("callbacks should not happen on OST\n");
1282                 /* fall through */
1283         default:
1284                 CERROR("Unexpected opcode %d\n", req->rq_reqmsg->opc);
1285                 req->rq_status = -ENOTSUPP;
1286                 rc = ptlrpc_error(req);
1287                 GOTO(out_free_oti, rc);
1288         }
1289
1290         LASSERT(current->journal_info == NULL);
1291
1292         EXIT;
1293         /* If we're DISCONNECTing, the export_data is already freed */
1294         if (!rc && req->rq_reqmsg->opc != OST_DISCONNECT) {
1295                 if (!obd->obd_no_transno) {
1296                         req->rq_repmsg->last_committed =
1297                                 obd->obd_last_committed;
1298                 } else {
1299                         DEBUG_REQ(D_IOCTL, req,
1300                                   "not sending last_committed update");
1301                 }
1302                 CDEBUG(D_INFO, "last_committed "LPU64", xid "LPX64"\n",
1303                        obd->obd_last_committed, req->rq_xid);
1304         }
1305
1306 out_check_req:
1307
1308         if (!rc)
1309                 oti_to_request(oti, req);
1310         target_send_reply(req, rc, fail);
1311         rc = 0;
1312
1313 out_free_oti:
1314         if (oti)
1315                 OBD_FREE(oti, sizeof(*oti));
1316         return rc;
1317 }
1318 EXPORT_SYMBOL(ost_handle);
1319
1320 int ost_attach(struct obd_device *dev, obd_count len, void *data)
1321 {
1322         struct lprocfs_static_vars lvars;
1323
1324         lprocfs_init_vars(ost,&lvars);
1325         return lprocfs_obd_attach(dev, lvars.obd_vars);
1326 }
1327
1328 int ost_detach(struct obd_device *dev)
1329 {
1330         return lprocfs_obd_detach(dev);
1331 }
1332
1333 extern struct file_operations ost_stimes_fops;
1334
1335 static int ost_setup(struct obd_device *obd, obd_count len, void *buf)
1336 {
1337         struct ost_obd *ost = &obd->u.ost;
1338         int rc;
1339         ENTRY;
1340
1341         rc = cleanup_group_info();
1342         if (rc)
1343                 RETURN(rc);
1344
1345         rc = llog_start_commit_thread();
1346         if (rc < 0)
1347                 RETURN(rc);
1348
1349         lprocfs_obd_seq_create(obd, "service_times", 0444, &ost_stimes_fops,
1350                                obd);
1351
1352         ost->ost_service =
1353                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
1354                                 OST_REQUEST_PORTAL, OSC_REPLY_PORTAL, 30000,
1355                                 ost_handle, "ost",
1356                                 obd->obd_proc_entry);
1357         if (ost->ost_service == NULL) {
1358                 CERROR("failed to start service\n");
1359                 RETURN(-ENOMEM);
1360         }
1361
1362         rc = ptlrpc_start_n_threads(obd, ost->ost_service, OST_NUM_THREADS,
1363                                     "ll_ost");
1364         if (rc)
1365                 GOTO(out_service, rc = -EINVAL);
1366
1367         ost->ost_create_service =
1368                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
1369                                 OST_CREATE_PORTAL, OSC_REPLY_PORTAL, 30000,
1370                                 ost_handle, "ost_create",
1371                                 obd->obd_proc_entry);
1372         if (ost->ost_create_service == NULL) {
1373                 CERROR("failed to start OST create service\n");
1374                 GOTO(out_service, rc = -ENOMEM);
1375         }
1376
1377
1378         spin_lock_init(&ost->ost_lock);
1379         ost->ost_service->srv_obddev = obd;
1380
1381         rc = ptlrpc_start_n_threads(obd, ost->ost_create_service, 1,
1382                                     "ll_ost_creat");
1383         if (rc)
1384                 GOTO(out_create, rc = -EINVAL);
1385
1386         ost->ost_destroy_service =
1387                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
1388                                 OST_DESTROY_PORTAL, OSC_REPLY_PORTAL, 30000,
1389                                 ost_handle, "ost_destroy",
1390                                 obd->obd_proc_entry);
1391         if (ost->ost_destroy_service == NULL) {
1392                 CERROR("failed to start service\n");
1393                 GOTO(out_create, rc = -ENOMEM);
1394         }
1395
1396         rc = ptlrpc_start_n_threads(obd, ost->ost_destroy_service,
1397                                     OST_NUM_THREADS, "ll_dstr_ost");
1398         if (rc)
1399                 GOTO(out_destroy, rc = -EINVAL);
1400
1401         RETURN(0);
1402
1403 out_destroy:
1404         ptlrpc_unregister_service(ost->ost_destroy_service);
1405 out_create:
1406         ptlrpc_unregister_service(ost->ost_create_service);
1407 out_service:
1408         ptlrpc_unregister_service(ost->ost_service);
1409         RETURN(rc);
1410 }
1411
1412 extern void lgss_svc_cache_purge_all(void);
1413 static int ost_cleanup(struct obd_device *obd, int flags)
1414 {
1415         struct ost_obd *ost = &obd->u.ost;
1416         int err = 0;
1417         ENTRY;
1418
1419         spin_lock_bh(&obd->obd_processing_task_lock);
1420         if (obd->obd_recovering) {
1421                 target_cancel_recovery_timer(obd);
1422                 obd->obd_recovering = 0;
1423         }
1424         spin_unlock_bh(&obd->obd_processing_task_lock);
1425
1426         ptlrpc_stop_all_threads(ost->ost_service);
1427         ptlrpc_unregister_service(ost->ost_service);
1428
1429         ptlrpc_stop_all_threads(ost->ost_create_service);
1430         ptlrpc_unregister_service(ost->ost_create_service);
1431
1432         ptlrpc_stop_all_threads(ost->ost_destroy_service);
1433         ptlrpc_unregister_service(ost->ost_destroy_service);
1434
1435 #ifdef ENABLE_GSS
1436         /* XXX */
1437         lgss_svc_cache_purge_all();
1438 #endif
1439         RETURN(err);
1440 }
1441
1442 /* use obd ops to offer management infrastructure */
1443 static struct obd_ops ost_obd_ops = {
1444         .o_owner        = THIS_MODULE,
1445         .o_attach       = ost_attach,
1446         .o_detach       = ost_detach,
1447         .o_setup        = ost_setup,
1448         .o_cleanup      = ost_cleanup,
1449 };
1450
1451 static int __init ost_init(void)
1452 {
1453         struct lprocfs_static_vars lvars;
1454         ENTRY;
1455
1456         lprocfs_init_vars(ost,&lvars);
1457         RETURN(class_register_type(&ost_obd_ops, NULL, lvars.module_vars,
1458                                    OBD_OST_DEVICENAME));
1459 }
1460
1461 static void /*__exit*/ ost_exit(void)
1462 {
1463         class_unregister_type(OBD_OST_DEVICENAME);
1464 }
1465
1466 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1467 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
1468 MODULE_LICENSE("GPL");
1469
1470 module_init(ost_init);
1471 module_exit(ost_exit);