lustre/ost/ost_handler.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
   5  *   Author: Peter J. Braam <braam@clusterfs.com>
   6  *   Author: Phil Schwan <phil@clusterfs.com>
   7  *
   8  *   This file is part of Lustre, http://www.lustre.org.
   9  *
  10  *   Lustre is free software; you can redistribute it and/or
  11  *   modify it under the terms of version 2 of the GNU General Public
  12  *   License as published by the Free Software Foundation.
  13  *
  14  *   Lustre is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with Lustre; if not, write to the Free Software
  21  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  *  Storage Target Handling functions
  24  *  Lustre Object Server Module (OST)
  25  *
  26  *  This server is single threaded at present (but can easily be multi
  27  *  threaded). For testing and management it is treated as an
  28  *  obd_device, although it does not export a full OBD method table
  29  *  (the requests are coming in over the wire, so object target
  30  *  modules do not have a full method table.)
  31  */
  32
  33 #ifndef EXPORT_SYMTAB
  34 # define EXPORT_SYMTAB
  35 #endif
  36 #define DEBUG_SUBSYSTEM S_OST
  37
  38 #include <linux/module.h>
  39 #include <linux/obd_ost.h>
  40 #include <linux/lustre_net.h>
  41 #include <linux/lustre_dlm.h>
  42 #include <linux/lustre_export.h>
  43 #include <linux/init.h>
  44 #include <linux/lprocfs_status.h>
  45 #include <linux/lustre_commit_confd.h>
  46 #include <portals/list.h>
  47
  48 void oti_init(struct obd_trans_info *oti, struct ptlrpc_request *req)
  49 {
  50         if (oti == NULL)
  51                 return;
  52         memset(oti, 0, sizeof *oti);
  53
  54         if (req->rq_repmsg && req->rq_reqmsg != 0)
  55                 oti->oti_transno = req->rq_repmsg->transno;
  56 }
  57
  58 void oti_to_request(struct obd_trans_info *oti, struct ptlrpc_request *req)
  59 {
  60         struct oti_req_ack_lock *ack_lock;
  61         int i;
  62
  63         if (oti == NULL)
  64                 return;
  65
  66         if (req->rq_repmsg)
  67                 req->rq_repmsg->transno = oti->oti_transno;
  68
  69         /* XXX 4 == entries in oti_ack_locks??? */
  70         for (ack_lock = oti->oti_ack_locks, i = 0; i < 4; i++, ack_lock++) {
  71                 if (!ack_lock->mode)
  72                         break;
  73                 /* XXX not even calling target_send_reply in some cases... */
  74                 ptlrpc_save_lock (req, &ack_lock->lock, ack_lock->mode);
  75         }
  76 }
  77
  78 static int ost_destroy(struct obd_export *exp, struct ptlrpc_request *req,
  79                        struct obd_trans_info *oti)
  80 {
  81         struct ost_body *body, *repbody;
  82         int rc, size = sizeof(*body);
  83         ENTRY;
  84
  85         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
  86         if (body == NULL)
  87                 RETURN(-EFAULT);
  88
  89         rc = lustre_pack_reply(req, 1, &size, NULL);
  90         if (rc)
  91                 RETURN(rc);
  92
  93         if (body->oa.o_valid & OBD_MD_FLCOOKIE)
  94                 oti->oti_logcookies = obdo_logcookie(&body->oa);
  95         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
  96         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
  97         req->rq_status = obd_destroy(exp, &body->oa, NULL, oti);
  98         RETURN(0);
  99 }
 100
 101 static int ost_getattr(struct obd_export *exp, struct ptlrpc_request *req)
 102 {
 103         struct ost_body *body, *repbody;
 104         int rc, size = sizeof(*body);
 105         ENTRY;
 106
 107         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 108         if (body == NULL)
 109                 RETURN(-EFAULT);
 110
 111         rc = lustre_pack_reply(req, 1, &size, NULL);
 112         if (rc)
 113                 RETURN(rc);
 114
 115         repbody = lustre_msg_buf (req->rq_repmsg, 0, sizeof(*repbody));
 116         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 117         req->rq_status = obd_getattr(exp, &repbody->oa, NULL);
 118         RETURN(0);
 119 }
 120
 121 static int ost_statfs(struct ptlrpc_request *req)
 122 {
 123         struct obd_statfs *osfs;
 124         int rc, size = sizeof(*osfs);
 125         ENTRY;
 126
 127         rc = lustre_pack_reply(req, 1, &size, NULL);
 128         if (rc)
 129                 RETURN(rc);
 130
 131         osfs = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*osfs));
 132
 133         req->rq_status = obd_statfs(req->rq_export->exp_obd, osfs, jiffies-HZ);
 134         if (req->rq_status != 0)
 135                 CERROR("ost: statfs failed: rc %d\n", req->rq_status);
 136
 137         RETURN(0);
 138 }
 139
 140 static int ost_create(struct obd_export *exp, struct ptlrpc_request *req,
 141                       struct obd_trans_info *oti)
 142 {
 143         struct ost_body *body, *repbody;
 144         int rc, size = sizeof(*repbody);
 145         ENTRY;
 146
 147         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 148         if (body == NULL)
 149                 RETURN(-EFAULT);
 150
 151         rc = lustre_pack_reply(req, 1, &size, NULL);
 152         if (rc)
 153                 RETURN(rc);
 154
 155         repbody = lustre_msg_buf (req->rq_repmsg, 0, sizeof(*repbody));
 156         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 157         oti->oti_logcookies = obdo_logcookie(&repbody->oa);
 158         req->rq_status = obd_create(exp, &repbody->oa, NULL, oti);
 159         //obd_log_cancel(conn, NULL, 1, oti->oti_logcookies, 0);
 160         RETURN(0);
 161 }
 162
 163 static int ost_punch(struct obd_export *exp, struct ptlrpc_request *req,
 164                      struct obd_trans_info *oti)
 165 {
 166         struct ost_body *body, *repbody;
 167         int rc, size = sizeof(*repbody);
 168         ENTRY;
 169
 170         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 171         if (body == NULL)
 172                 RETURN(-EFAULT);
 173
 174         if ((body->oa.o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
 175             (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
 176                 RETURN(-EINVAL);
 177
 178         rc = lustre_pack_reply(req, 1, &size, NULL);
 179         if (rc)
 180                 RETURN(rc);
 181
 182         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 183         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 184         req->rq_status = obd_punch(exp, &repbody->oa, NULL, repbody->oa.o_size,
 185                                    repbody->oa.o_blocks, oti);
 186         RETURN(0);
 187 }
 188
 189 static int ost_sync(struct obd_export *exp, struct ptlrpc_request *req)
 190 {
 191         struct ost_body *body, *repbody;
 192         int rc, size = sizeof(*repbody);
 193         ENTRY;
 194
 195         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 196         if (body == NULL)
 197                 RETURN(-EFAULT);
 198
 199         rc = lustre_pack_reply(req, 1, &size, NULL);
 200         if (rc)
 201                 RETURN(rc);
 202
 203         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 204         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 205         req->rq_status = obd_sync(exp, &repbody->oa, NULL, repbody->oa.o_size,
 206                                   repbody->oa.o_blocks);
 207         RETURN(0);
 208 }
 209
 210 static int ost_setattr(struct obd_export *exp, struct ptlrpc_request *req,
 211                        struct obd_trans_info *oti)
 212 {
 213         struct ost_body *body, *repbody;
 214         int rc, size = sizeof(*repbody);
 215         ENTRY;
 216
 217         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 218         if (body == NULL)
 219                 RETURN(-EFAULT);
 220
 221         rc = lustre_pack_reply(req, 1, &size, NULL);
 222         if (rc)
 223                 RETURN(rc);
 224
 225         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 226         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 227
 228         req->rq_status = obd_setattr(exp, &repbody->oa, NULL, oti);
 229         RETURN(0);
 230 }
 231
 232 static int ost_bulk_timeout(void *data)
 233 {
 234         ENTRY;
 235         /* We don't fail the connection here, because having the export
 236          * killed makes the (vital) call to commitrw very sad.
 237          */
 238         RETURN(1);
 239 }
 240
 241 static int get_per_page_niobufs(struct obd_ioobj *ioo, int nioo,
 242                                 struct niobuf_remote *rnb, int nrnb,
 243                                 struct niobuf_remote **pp_rnbp)
 244 {
 245         /* Copy a remote niobuf, splitting it into page-sized chunks
 246          * and setting ioo[i].ioo_bufcnt accordingly */
 247         struct niobuf_remote *pp_rnb;
 248         int   i;
 249         int   j;
 250         int   page;
 251         int   rnbidx = 0;
 252         int   npages = 0;
 253
 254         /* first count and check the number of pages required */
 255         for (i = 0; i < nioo; i++)
 256                 for (j = 0; j < ioo->ioo_bufcnt; j++, rnbidx++) {
 257                         obd_off offset = rnb[rnbidx].offset;
 258                         obd_off p0 = offset >> PAGE_SHIFT;
 259                         obd_off pn = (offset + rnb[rnbidx].len - 1)>>PAGE_SHIFT;
 260
 261                         LASSERT(rnbidx < nrnb);
 262
 263                         npages += (pn + 1 - p0);
 264
 265                         if (rnb[rnbidx].len == 0) {
 266                                 CERROR("zero len BRW: obj %d objid "LPX64
 267                                        " buf %u\n", i, ioo[i].ioo_id, j);
 268                                 return -EINVAL;
 269                         }
 270                         if (j > 0 &&
 271                             rnb[rnbidx].offset <= rnb[rnbidx-1].offset) {
 272                                 CERROR("unordered BRW: obj %d objid "LPX64
 273                                        " buf %u offset "LPX64" <= "LPX64"\n",
 274                                        i, ioo[i].ioo_id, j, rnb[rnbidx].offset,
 275                                        rnb[rnbidx].offset);
 276                                 return -EINVAL;
 277                         }
 278                 }
 279
 280         LASSERT(rnbidx == nrnb);
 281
 282         if (npages == nrnb) {       /* all niobufs are for single pages */
 283                 *pp_rnbp = rnb;
 284                 return npages;
 285         }
 286
 287         OBD_ALLOC(pp_rnb, sizeof(*pp_rnb) * npages);
 288         if (pp_rnb == NULL)
 289                 return -ENOMEM;
 290
 291         /* now do the actual split */
 292         page = rnbidx = 0;
 293         for (i = 0; i < nioo; i++) {
 294                 int  obj_pages = 0;
 295
 296                 for (j = 0; j < ioo[i].ioo_bufcnt; j++, rnbidx++) {
 297                         obd_off off = rnb[rnbidx].offset;
 298                         int     nob = rnb[rnbidx].len;
 299
 300                         LASSERT(rnbidx < nrnb);
 301                         do {
 302                                 obd_off  poff = off & (PAGE_SIZE - 1);
 303                                 int      pnob = (poff + nob > PAGE_SIZE) ?
 304                                                 PAGE_SIZE - poff : nob;
 305
 306                                 LASSERT(page < npages);
 307                                 pp_rnb[page].len = pnob;
 308                                 pp_rnb[page].offset = off;
 309                                 pp_rnb[page].flags = rnb[rnbidx].flags;
 310
 311                                 CDEBUG(0, "   obj %d id "LPX64
 312                                        "page %d(%d) "LPX64" for %d, flg %x\n",
 313                                        i, ioo[i].ioo_id, obj_pages, page,
 314                                        pp_rnb[page].offset, pp_rnb[page].len,
 315                                        pp_rnb[page].flags);
 316                                 page++;
 317                                 obj_pages++;
 318
 319                                 off += pnob;
 320                                 nob -= pnob;
 321                         } while (nob > 0);
 322                         LASSERT(nob == 0);
 323                 }
 324                 ioo[i].ioo_bufcnt = obj_pages;
 325         }
 326         LASSERT(page == npages);
 327
 328         *pp_rnbp = pp_rnb;
 329         return npages;
 330 }
 331
 332 static void free_per_page_niobufs (int npages, struct niobuf_remote *pp_rnb,
 333                                    struct niobuf_remote *rnb)
 334 {
 335         if (pp_rnb == rnb)                      /* didn't allocate above */
 336                 return;
 337
 338         OBD_FREE(pp_rnb, sizeof(*pp_rnb) * npages);
 339 }
 340
 341 #if CHECKSUM_BULK
 342 obd_count ost_checksum_bulk(struct ptlrpc_bulk_desc *desc)
 343 {
 344         obd_count cksum = 0;
 345         struct ptlrpc_bulk_page *bp;
 346
 347         list_for_each_entry(bp, &desc->bd_page_list, bp_link) {
 348                 ost_checksum(&cksum, kmap(bp->bp_page) + bp->bp_pageoffset,
 349                              bp->bp_buflen);
 350                 kunmap(bp->bp_page);
 351         }
 352
 353         return cksum;
 354 }
 355 #endif
 356
 357 static int ost_brw_read(struct ptlrpc_request *req)
 358 {
 359         struct ptlrpc_bulk_desc *desc;
 360         struct niobuf_remote    *remote_nb;
 361         struct niobuf_remote    *pp_rnb;
 362         struct niobuf_local     *local_nb;
 363         struct obd_ioobj        *ioo;
 364         struct ost_body         *body, *repbody;
 365         struct l_wait_info       lwi;
 366         struct obd_trans_info    oti = { 0 };
 367         char                     str[PTL_NALFMT_SIZE];
 368         int                      size[1] = { sizeof(*body) };
 369         int                      comms_error = 0;
 370         int                      niocount;
 371         int                      npages;
 372         int                      nob = 0;
 373         int                      rc;
 374         int                      i;
 375         ENTRY;
 376
 377         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK))
 378                 GOTO(out, rc = -EIO);
 379
 380         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 381                          (obd_timeout + 1) / 4);
 382
 383         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 384         if (body == NULL) {
 385                 CERROR("Missing/short ost_body\n");
 386                 GOTO(out, rc = -EFAULT);
 387         }
 388
 389         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 390         if (ioo == NULL) {
 391                 CERROR("Missing/short ioobj\n");
 392                 GOTO(out, rc = -EFAULT);
 393         }
 394
 395         niocount = ioo->ioo_bufcnt;
 396         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 397                                        lustre_swab_niobuf_remote);
 398         if (remote_nb == NULL) {
 399                 CERROR("Missing/short niobuf\n");
 400                 GOTO(out, rc = -EFAULT);
 401         }
 402         if (lustre_msg_swabbed(req->rq_reqmsg)) { /* swab remaining niobufs */
 403                 for (i = 1; i < niocount; i++)
 404                         lustre_swab_niobuf_remote (&remote_nb[i]);
 405         }
 406
 407         rc = lustre_pack_reply(req, 1, size, NULL);
 408         if (rc)
 409                 GOTO(out, rc);
 410
 411         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 412         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 413         npages = get_per_page_niobufs(ioo, 1, remote_nb, niocount, &pp_rnb);
 414         if (npages < 0)
 415                 GOTO(out, rc = npages);
 416
 417         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 418         if (local_nb == NULL)
 419                 GOTO(out_pp_rnb, rc = -ENOMEM);
 420
 421         desc = ptlrpc_prep_bulk_exp (req, npages,
 422                                      BULK_PUT_SOURCE, OST_BULK_PORTAL);
 423         if (desc == NULL)
 424                 GOTO(out_local, rc = -ENOMEM);
 425
 426         rc = obd_preprw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 427                         ioo, npages, pp_rnb, local_nb, &oti);
 428         if (rc != 0)
 429                 GOTO(out_bulk, rc);
 430
 431         nob = 0;
 432         for (i = 0; i < npages; i++) {
 433                 int page_rc = local_nb[i].rc;
 434
 435                 if (page_rc < 0) {              /* error */
 436                         rc = page_rc;
 437                         break;
 438                 }
 439
 440                 LASSERT(page_rc <= pp_rnb[i].len);
 441                 nob += page_rc;
 442                 if (page_rc != 0) {             /* some data! */
 443                         LASSERT (local_nb[i].page != NULL);
 444                         ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 445                                               pp_rnb[i].offset & (PAGE_SIZE - 1),
 446                                               page_rc);
 447                 }
 448
 449                 if (page_rc != pp_rnb[i].len) { /* short read */
 450                         /* All subsequent pages should be 0 */
 451                         while(++i < npages)
 452                                 LASSERT(local_nb[i].rc == 0);
 453                         break;
 454                 }
 455         }
 456
 457         if (rc == 0) {
 458                 rc = ptlrpc_start_bulk_transfer(desc);
 459                 if (rc == 0) {
 460                         lwi = LWI_TIMEOUT(obd_timeout * HZ / 4,
 461                                           ost_bulk_timeout, desc);
 462                         rc = l_wait_event(desc->bd_waitq,
 463                                           !ptlrpc_bulk_active(desc), &lwi);
 464                         LASSERT(rc == 0 || rc == -ETIMEDOUT);
 465                         if (rc == -ETIMEDOUT) {
 466                                 DEBUG_REQ(D_ERROR, req, "timeout on bulk PUT");
 467                                 ptlrpc_abort_bulk(desc);
 468                         } else if (!desc->bd_success ||
 469                                    desc->bd_nob_transferred != desc->bd_nob) {
 470                                 DEBUG_REQ(D_ERROR, req, "%s bulk PUT %d(%d)",
 471                                           desc->bd_success ?
 472                                           "truncated" : "network error on",
 473                                           desc->bd_nob_transferred,
 474                                           desc->bd_nob);
 475                                 /* XXX should this be a different errno? */
 476                                 rc = -ETIMEDOUT;
 477                         }
 478                 } else {
 479                         DEBUG_REQ(D_ERROR, req, "bulk PUT failed: rc %d\n", rc);
 480                 }
 481                 comms_error = rc != 0;
 482         }
 483
 484         /* Must commit after prep above in all cases */
 485         rc = obd_commitrw(OBD_BRW_READ, req->rq_export, &body->oa, 1,
 486                           ioo, npages, local_nb, &oti);
 487
 488         if (rc == 0) {
 489                 repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 490                 memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 491
 492 #if CHECKSUM_BULK
 493                 repbody->oa.o_cksum = ost_checksum_bulk(desc);
 494                 repbody->oa.o_valid |= OBD_MD_FLCKSUM;
 495 #endif
 496         }
 497
 498  out_bulk:
 499         ptlrpc_free_bulk(desc);
 500  out_local:
 501         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 502  out_pp_rnb:
 503         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 504  out:
 505         LASSERT(rc <= 0);
 506         if (rc == 0) {
 507                 req->rq_status = nob;
 508                 ptlrpc_reply(req);
 509         } else if (!comms_error) {
 510                 /* only reply if comms OK */
 511                 req->rq_status = rc;
 512                 ptlrpc_error(req);
 513         } else {
 514                 if (req->rq_reply_state != NULL) {
 515                         /* reply out callback would free */
 516                         lustre_free_reply_state (req->rq_reply_state);
 517                 }
 518                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 519                         CERROR("bulk IO comms error: "
 520                                "evicting %s@%s nid "LPX64" (%s)\n",
 521                                req->rq_export->exp_client_uuid.uuid,
 522                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 523                                req->rq_peer.peer_nid,
 524                                portals_nid2str(req->rq_peer.peer_ni->pni_number,
 525                                                req->rq_peer.peer_nid,
 526                                                str));
 527                         ptlrpc_fail_export(req->rq_export);
 528                 } else {
 529                         CERROR("ignoring bulk IO comms error: "
 530                                "client reconnected %s@%s nid "LPX64" (%s)\n",
 531                                req->rq_export->exp_client_uuid.uuid,
 532                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 533                                req->rq_peer.peer_nid,
 534                                portals_nid2str(req->rq_peer.peer_ni->pni_number,
 535                                                req->rq_peer.peer_nid,
 536                                                str));
 537                 }
 538         }
 539
 540         RETURN(rc);
 541 }
 542
 543 static int ost_brw_write(struct ptlrpc_request *req, struct obd_trans_info *oti)
 544 {
 545         struct ptlrpc_bulk_desc *desc;
 546         struct niobuf_remote    *remote_nb;
 547         struct niobuf_remote    *pp_rnb;
 548         struct niobuf_local     *local_nb;
 549         struct obd_ioobj        *ioo;
 550         struct ost_body         *body, *repbody;
 551         struct l_wait_info       lwi;
 552         __u32                   *rcs;
 553         int                      size[2] = { sizeof(*body) };
 554         int                      objcount, niocount, npages;
 555         int                      comms_error = 0;
 556         int                      rc, rc2, swab, i, j;
 557         char                     str[PTL_NALFMT_SIZE];
 558         ENTRY;
 559
 560         if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
 561                 GOTO(out, rc = -EIO);
 562
 563         /* pause before transaction has been started */
 564         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK | OBD_FAIL_ONCE,
 565                          (obd_timeout + 1) / 4);
 566
 567         swab = lustre_msg_swabbed(req->rq_reqmsg);
 568         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 569         if (body == NULL) {
 570                 CERROR("Missing/short ost_body\n");
 571                 GOTO(out, rc = -EFAULT);
 572         }
 573
 574         LASSERT_REQSWAB(req, 1);
 575         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 576         if (objcount == 0) {
 577                 CERROR("Missing/short ioobj\n");
 578                 GOTO(out, rc = -EFAULT);
 579         }
 580         ioo = lustre_msg_buf (req->rq_reqmsg, 1, objcount * sizeof(*ioo));
 581         LASSERT (ioo != NULL);
 582         for (niocount = i = 0; i < objcount; i++) {
 583                 if (swab)
 584                         lustre_swab_obd_ioobj (&ioo[i]);
 585                 if (ioo[i].ioo_bufcnt == 0) {
 586                         CERROR("ioo[%d] has zero bufcnt\n", i);
 587                         GOTO(out, rc = -EFAULT);
 588                 }
 589                 niocount += ioo[i].ioo_bufcnt;
 590         }
 591
 592         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 593                                        lustre_swab_niobuf_remote);
 594         if (remote_nb == NULL) {
 595                 CERROR("Missing/short niobuf\n");
 596                 GOTO(out, rc = -EFAULT);
 597         }
 598         if (swab) {                             /* swab the remaining niobufs */
 599                 for (i = 1; i < niocount; i++)
 600                         lustre_swab_niobuf_remote (&remote_nb[i]);
 601         }
 602
 603         size[1] = niocount * sizeof(*rcs);
 604         rc = lustre_pack_reply(req, 2, size, NULL);
 605         if (rc != 0)
 606                 GOTO(out, rc);
 607         rcs = lustre_msg_buf(req->rq_repmsg, 1, niocount * sizeof(*rcs));
 608
 609         /* FIXME all niobuf splitting should be done in obdfilter if needed */
 610         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 611         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 612         if (npages < 0)
 613                 GOTO(out, rc = npages);
 614
 615         OBD_ALLOC(local_nb, sizeof(*local_nb) * npages);
 616         if (local_nb == NULL)
 617                 GOTO(out_pp_rnb, rc = -ENOMEM);
 618
 619         desc = ptlrpc_prep_bulk_exp (req, npages,
 620                                      BULK_GET_SINK, OST_BULK_PORTAL);
 621         if (desc == NULL)
 622                 GOTO(out_local, rc = -ENOMEM);
 623
 624         rc = obd_preprw(OBD_BRW_WRITE, req->rq_export, &body->oa, objcount,
 625                         ioo, npages, pp_rnb, local_nb, oti);
 626         if (rc != 0)
 627                 GOTO(out_bulk, rc);
 628
 629         /* NB Having prepped, we must commit... */
 630
 631         for (i = 0; i < npages; i++)
 632                 ptlrpc_prep_bulk_page(desc, local_nb[i].page,
 633                                       pp_rnb[i].offset & (PAGE_SIZE - 1),
 634                                       pp_rnb[i].len);
 635
 636         rc = ptlrpc_start_bulk_transfer (desc);
 637         if (rc == 0) {
 638                 lwi = LWI_TIMEOUT(obd_timeout * HZ / 4,
 639                                   ost_bulk_timeout, desc);
 640                 rc = l_wait_event(desc->bd_waitq, !ptlrpc_bulk_active(desc),
 641                                   &lwi);
 642                 LASSERT(rc == 0 || rc == -ETIMEDOUT);
 643                 if (rc == -ETIMEDOUT) {
 644                         DEBUG_REQ(D_ERROR, req, "timeout on bulk GET");
 645                         ptlrpc_abort_bulk(desc);
 646                 } else if (!desc->bd_success ||
 647                            desc->bd_nob_transferred != desc->bd_nob) {
 648                         DEBUG_REQ(D_ERROR, req, "%s bulk GET %d(%d)",
 649                                   desc->bd_success ?
 650                                   "truncated" : "network error on",
 651                                   desc->bd_nob_transferred, desc->bd_nob);
 652                         /* XXX should this be a different errno? */
 653                         rc = -ETIMEDOUT;
 654                 }
 655         } else {
 656                 DEBUG_REQ(D_ERROR, req, "ptlrpc_bulk_get failed: rc %d\n", rc);
 657         }
 658         comms_error = rc != 0;
 659
 660         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 661         memcpy(&repbody->oa, &body->oa, sizeof(repbody->oa));
 662
 663 #if CHECKSUM_BULK
 664         if (rc == 0 && (body->oa.o_valid & OBD_MD_FLCKSUM) != 0) {
 665                 static int cksum_counter;
 666                 obd_count client_cksum = body->oa.o_cksum;
 667                 obd_count cksum = ost_checksum_bulk(desc);
 668
 669                 portals_nid2str(req->rq_connection->c_peer.peer_ni->pni_number,
 670                                 req->rq_connection->c_peer.peer_nid, str);
 671                 if (client_cksum != cksum) {
 672                         CERROR("Bad checksum: client %x, server %x, client NID "
 673                                LPX64" (%s)\n", client_cksum, cksum,
 674                                req->rq_connection->c_peer.peer_nid, str);
 675                         cksum_counter = 1;
 676                         repbody->oa.o_cksum = cksum;
 677                 } else {
 678                         cksum_counter++;
 679                         if ((cksum_counter & (-cksum_counter)) == cksum_counter)
 680                                 CWARN("Checksum %u from "LPX64": %x OK\n",
 681                                       cksum_counter,
 682                                       req->rq_connection->c_peer.peer_nid,
 683                                       cksum);
 684                 }
 685         }
 686 #endif
 687         /* Must commit after prep above in all cases */
 688         rc2 = obd_commitrw(OBD_BRW_WRITE, req->rq_export, &repbody->oa,
 689                            objcount, ioo, npages, local_nb, oti);
 690
 691         if (rc == 0) {
 692                 /* set per-requested niobuf return codes */
 693                 for (i = j = 0; i < niocount; i++) {
 694                         int nob = remote_nb[i].len;
 695
 696                         rcs[i] = 0;
 697                         do {
 698                                 LASSERT(j < npages);
 699                                 if (local_nb[j].rc < 0)
 700                                         rcs[i] = local_nb[j].rc;
 701                                 nob -= pp_rnb[j].len;
 702                                 j++;
 703                         } while (nob > 0);
 704                         LASSERT(nob == 0);
 705                 }
 706                 LASSERT(j == npages);
 707         }
 708         if (rc == 0)
 709                 rc = rc2;
 710
 711  out_bulk:
 712         ptlrpc_free_bulk(desc);
 713  out_local:
 714         OBD_FREE(local_nb, sizeof(*local_nb) * npages);
 715  out_pp_rnb:
 716         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 717  out:
 718         if (rc == 0) {
 719                 oti_to_request(oti, req);
 720                 rc = ptlrpc_reply(req);
 721         } else if (!comms_error) {
 722                 /* Only reply if there was no comms problem with bulk */
 723                 req->rq_status = rc;
 724                 ptlrpc_error(req);
 725         } else {
 726                 if (req->rq_reply_state != NULL) {
 727                         /* reply out callback would free */
 728                         lustre_free_reply_state (req->rq_reply_state);
 729                 }
 730                 if (req->rq_reqmsg->conn_cnt == req->rq_export->exp_conn_cnt) {
 731                         CERROR("bulk IO comms error: "
 732                                "evicting %s@%s nid "LPX64" (%s)\n",
 733                                req->rq_export->exp_client_uuid.uuid,
 734                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 735                                req->rq_peer.peer_nid,
 736                                portals_nid2str(req->rq_peer.peer_ni->pni_number,
 737                                                req->rq_peer.peer_nid,
 738                                                str));
 739                         ptlrpc_fail_export(req->rq_export);
 740                 } else {
 741                         CERROR("ignoring bulk IO comms error: "
 742                                "client reconnected %s@%s nid "LPX64" (%s)\n",
 743                                req->rq_export->exp_client_uuid.uuid,
 744                                req->rq_export->exp_connection->c_remote_uuid.uuid,
 745                                req->rq_peer.peer_nid,
 746                                portals_nid2str(req->rq_peer.peer_ni->pni_number,
 747                                                req->rq_peer.peer_nid,
 748                                                str));
 749                 }
 750         }
 751         RETURN(rc);
 752 }
 753
 754 static int ost_san_brw(struct ptlrpc_request *req, int cmd)
 755 {
 756         struct niobuf_remote *remote_nb, *res_nb, *pp_rnb;
 757         struct obd_ioobj *ioo;
 758         struct ost_body *body, *repbody;
 759         int rc, i, objcount, niocount, size[2] = {sizeof(*body)}, npages;
 760         int swab;
 761         ENTRY;
 762
 763         /* XXX not set to use latest protocol */
 764
 765         swab = lustre_msg_swabbed(req->rq_reqmsg);
 766         body = lustre_swab_reqbuf(req, 0, sizeof(*body), lustre_swab_ost_body);
 767         if (body == NULL) {
 768                 CERROR("Missing/short ost_body\n");
 769                 GOTO(out, rc = -EFAULT);
 770         }
 771
 772         ioo = lustre_swab_reqbuf(req, 1, sizeof(*ioo), lustre_swab_obd_ioobj);
 773         if (ioo == NULL) {
 774                 CERROR("Missing/short ioobj\n");
 775                 GOTO(out, rc = -EFAULT);
 776         }
 777         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 778         niocount = ioo[0].ioo_bufcnt;
 779         for (i = 1; i < objcount; i++) {
 780                 if (swab)
 781                         lustre_swab_obd_ioobj (&ioo[i]);
 782                 niocount += ioo[i].ioo_bufcnt;
 783         }
 784
 785         remote_nb = lustre_swab_reqbuf(req, 2, niocount * sizeof(*remote_nb),
 786                                        lustre_swab_niobuf_remote);
 787         if (remote_nb == NULL) {
 788                 CERROR("Missing/short niobuf\n");
 789                 GOTO(out, rc = -EFAULT);
 790         }
 791         if (swab) {                             /* swab the remaining niobufs */
 792                 for (i = 1; i < niocount; i++)
 793                         lustre_swab_niobuf_remote (&remote_nb[i]);
 794         }
 795
 796         /* CAVEAT EMPTOR this sets ioo->ioo_bufcnt to # pages */
 797         npages = get_per_page_niobufs(ioo, objcount,remote_nb,niocount,&pp_rnb);
 798         if (npages < 0)
 799                 GOTO (out, rc = npages);
 800
 801         size[1] = npages * sizeof(*pp_rnb);
 802         rc = lustre_pack_reply(req, 2, size, NULL);
 803         if (rc)
 804                 GOTO(out_pp_rnb, rc);
 805
 806         req->rq_status = obd_san_preprw(cmd, req->rq_export, &body->oa,
 807                                         objcount, ioo, npages, pp_rnb);
 808
 809         if (req->rq_status)
 810                 GOTO(out_pp_rnb, rc = 0);
 811
 812         repbody = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*repbody));
 813         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 814
 815         res_nb = lustre_msg_buf(req->rq_repmsg, 1, size[1]);
 816         memcpy(res_nb, remote_nb, size[1]);
 817         rc = 0;
 818 out_pp_rnb:
 819         free_per_page_niobufs(npages, pp_rnb, remote_nb);
 820 out:
 821         if (rc) {
 822                 req->rq_status = rc;
 823                 ptlrpc_error(req);
 824         } else
 825                 ptlrpc_reply(req);
 826
 827         return rc;
 828 }
 829
 830
 831 static int ost_set_info(struct obd_export *exp, struct ptlrpc_request *req)
 832 {
 833         char *key;
 834         int keylen, rc = 0;
 835         ENTRY;
 836
 837         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 838         if (key == NULL) {
 839                 DEBUG_REQ(D_HA, req, "no set_info key");
 840                 RETURN(-EFAULT);
 841         }
 842         keylen = req->rq_reqmsg->buflens[0];
 843
 844         rc = lustre_pack_reply(req, 0, NULL, NULL);
 845         if (rc)
 846                 RETURN(rc);
 847
 848         rc = obd_set_info(exp, keylen, key, 0, NULL);
 849         req->rq_repmsg->status = 0;
 850         RETURN(rc);
 851 }
 852
 853 static int ost_get_info(struct obd_export *exp, struct ptlrpc_request *req)
 854 {
 855         char *key;
 856         int keylen, rc = 0, size = sizeof(obd_id);
 857         obd_id *reply;
 858         ENTRY;
 859
 860         key = lustre_msg_buf(req->rq_reqmsg, 0, 1);
 861         if (key == NULL) {
 862                 DEBUG_REQ(D_HA, req, "no get_info key");
 863                 RETURN(-EFAULT);
 864         }
 865         keylen = req->rq_reqmsg->buflens[0];
 866
 867         if (keylen < strlen("last_id") || memcmp(key, "last_id", 7) != 0)
 868                 RETURN(-EPROTO);
 869
 870         rc = lustre_pack_reply(req, 1, &size, NULL);
 871         if (rc)
 872                 RETURN(rc);
 873
 874         reply = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply));
 875         rc = obd_get_info(exp, keylen, key, &size, reply);
 876         req->rq_repmsg->status = 0;
 877         RETURN(rc);
 878 }
 879
 880 static int ost_filter_recovery_request(struct ptlrpc_request *req,
 881                                        struct obd_device *obd, int *process)
 882 {
 883         switch (req->rq_reqmsg->opc) {
 884         case OST_CONNECT: /* This will never get here, but for completeness. */
 885         case OST_DISCONNECT:
 886                *process = 1;
 887                RETURN(0);
 888
 889         case OBD_PING:
 890         case OST_CREATE:
 891         case OST_DESTROY:
 892         case OST_PUNCH:
 893         case OST_SETATTR:
 894         case OST_SYNC:
 895         case OST_WRITE:
 896         case OBD_LOG_CANCEL:
 897         case LDLM_ENQUEUE:
 898                 *process = target_queue_recovery_request(req, obd);
 899                 RETURN(0);
 900
 901         default:
 902                 DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
 903                 *process = 0;
 904                 /* XXX what should we set rq_status to here? */
 905                 req->rq_status = -EAGAIN;
 906                 RETURN(ptlrpc_error(req));
 907         }
 908 }
 909
 910
 911
 912 static int ost_handle(struct ptlrpc_request *req)
 913 {
 914         struct obd_trans_info trans_info = { 0, };
 915         struct obd_trans_info *oti = &trans_info;
 916         int should_process, fail = OBD_FAIL_OST_ALL_REPLY_NET, rc = 0;
 917         struct obd_export *exp = NULL;
 918         ENTRY;
 919
 920         LASSERT(current->journal_info == NULL);
 921         /* XXX identical to MDS */
 922         if (req->rq_reqmsg->opc != OST_CONNECT) {
 923                 struct obd_device *obd;
 924                 int abort_recovery, recovering;
 925
 926                 exp = req->rq_export;
 927
 928                 if (exp == NULL) {
 929                         CDEBUG(D_HA, "operation %d on unconnected OST\n",
 930                                req->rq_reqmsg->opc);
 931                         req->rq_status = -ENOTCONN;
 932                         GOTO(out, rc = -ENOTCONN);
 933                 }
 934
 935                 obd = exp->exp_obd;
 936
 937                 /* Check for aborted recovery. */
 938                 spin_lock_bh(&obd->obd_processing_task_lock);
 939                 abort_recovery = obd->obd_abort_recovery;
 940                 recovering = obd->obd_recovering;
 941                 spin_unlock_bh(&obd->obd_processing_task_lock);
 942                 if (abort_recovery) {
 943                         target_abort_recovery(obd);
 944                 } else if (recovering) {
 945                         rc = ost_filter_recovery_request(req, obd,
 946                                                          &should_process);
 947                         if (rc || !should_process)
 948                                 RETURN(rc);
 949                 }
 950         }
 951
 952         oti_init(oti, req);
 953
 954         switch (req->rq_reqmsg->opc) {
 955         case OST_CONNECT: {
 956                 CDEBUG(D_INODE, "connect\n");
 957                 OBD_FAIL_RETURN(OBD_FAIL_OST_CONNECT_NET, 0);
 958                 rc = target_handle_connect(req, ost_handle);
 959                 break;
 960         }
 961         case OST_DISCONNECT:
 962                 CDEBUG(D_INODE, "disconnect\n");
 963                 OBD_FAIL_RETURN(OBD_FAIL_OST_DISCONNECT_NET, 0);
 964                 rc = target_handle_disconnect(req);
 965                 break;
 966         case OST_CREATE:
 967                 CDEBUG(D_INODE, "create\n");
 968                 OBD_FAIL_RETURN(OBD_FAIL_OST_CREATE_NET, 0);
 969                 rc = ost_create(exp, req, oti);
 970                 break;
 971         case OST_DESTROY:
 972                 CDEBUG(D_INODE, "destroy\n");
 973                 OBD_FAIL_RETURN(OBD_FAIL_OST_DESTROY_NET, 0);
 974                 rc = ost_destroy(exp, req, oti);
 975                 break;
 976         case OST_GETATTR:
 977                 CDEBUG(D_INODE, "getattr\n");
 978                 OBD_FAIL_RETURN(OBD_FAIL_OST_GETATTR_NET, 0);
 979                 rc = ost_getattr(exp, req);
 980                 break;
 981         case OST_SETATTR:
 982                 CDEBUG(D_INODE, "setattr\n");
 983                 OBD_FAIL_RETURN(OBD_FAIL_OST_SETATTR_NET, 0);
 984                 rc = ost_setattr(exp, req, oti);
 985                 break;
 986         case OST_WRITE:
 987                 CDEBUG(D_INODE, "write\n");
 988                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 989                 rc = ost_brw_write(req, oti);
 990                 LASSERT(current->journal_info == NULL);
 991                 /* ost_brw sends its own replies */
 992                 RETURN(rc);
 993         case OST_READ:
 994                 CDEBUG(D_INODE, "read\n");
 995                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 996                 rc = ost_brw_read(req);
 997                 LASSERT(current->journal_info == NULL);
 998                 /* ost_brw sends its own replies */
 999                 RETURN(rc);
1000         case OST_SAN_READ:
1001                 CDEBUG(D_INODE, "san read\n");
1002                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1003                 rc = ost_san_brw(req, OBD_BRW_READ);
1004                 /* ost_san_brw sends its own replies */
1005                 RETURN(rc);
1006         case OST_SAN_WRITE:
1007                 CDEBUG(D_INODE, "san write\n");
1008                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
1009                 rc = ost_san_brw(req, OBD_BRW_WRITE);
1010                 /* ost_san_brw sends its own replies */
1011                 RETURN(rc);
1012         case OST_PUNCH:
1013                 CDEBUG(D_INODE, "punch\n");
1014                 OBD_FAIL_RETURN(OBD_FAIL_OST_PUNCH_NET, 0);
1015                 rc = ost_punch(exp, req, oti);
1016                 break;
1017         case OST_STATFS:
1018                 CDEBUG(D_INODE, "statfs\n");
1019                 OBD_FAIL_RETURN(OBD_FAIL_OST_STATFS_NET, 0);
1020                 rc = ost_statfs(req);
1021                 break;
1022         case OST_SYNC:
1023                 CDEBUG(D_INODE, "sync\n");
1024                 OBD_FAIL_RETURN(OBD_FAIL_OST_SYNC_NET, 0);
1025                 rc = ost_sync(exp, req);
1026                 break;
1027         case OST_SET_INFO:
1028                 DEBUG_REQ(D_INODE, req, "set_info");
1029                 rc = ost_set_info(exp, req);
1030                 break;
1031         case OST_GET_INFO:
1032                 DEBUG_REQ(D_INODE, req, "get_info");
1033                 rc = ost_get_info(exp, req);
1034                 break;
1035         case OBD_PING:
1036                 DEBUG_REQ(D_INODE, req, "ping");
1037                 rc = target_handle_ping(req);
1038                 break;
1039         /* FIXME - just reply status */
1040         case LLOG_ORIGIN_CONNECT:
1041                 DEBUG_REQ(D_INODE, req, "log connect\n");
1042                 rc = llog_handle_connect(req);
1043                 req->rq_status = rc;
1044                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1045                 if (rc)
1046                         RETURN(rc);
1047                 RETURN(ptlrpc_reply(req));
1048         case OBD_LOG_CANCEL:
1049                 CDEBUG(D_INODE, "log cancel\n");
1050                 OBD_FAIL_RETURN(OBD_FAIL_OBD_LOG_CANCEL_NET, 0);
1051                 rc = llog_origin_handle_cancel(req);
1052                 req->rq_status = rc;
1053                 rc = lustre_pack_reply(req, 0, NULL, NULL);
1054                 if (rc)
1055                         RETURN(rc);
1056                 RETURN(ptlrpc_reply(req));
1057         case LDLM_ENQUEUE:
1058                 CDEBUG(D_INODE, "enqueue\n");
1059                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_ENQUEUE, 0);
1060                 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
1061                                          ldlm_server_blocking_ast);
1062                 fail = OBD_FAIL_OST_LDLM_REPLY_NET;
1063                 break;
1064         case LDLM_CONVERT:
1065                 CDEBUG(D_INODE, "convert\n");
1066                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CONVERT, 0);
1067                 rc = ldlm_handle_convert(req);
1068                 break;
1069         case LDLM_CANCEL:
1070                 CDEBUG(D_INODE, "cancel\n");
1071                 OBD_FAIL_RETURN(OBD_FAIL_LDLM_CANCEL, 0);
1072                 rc = ldlm_handle_cancel(req);
1073                 break;
1074         case LDLM_BL_CALLBACK:
1075         case LDLM_CP_CALLBACK:
1076                 CDEBUG(D_INODE, "callback\n");
1077                 CERROR("callbacks should not happen on OST\n");
1078                 /* fall through */
1079         default:
1080                 CERROR("Unexpected opcode %d\n", req->rq_reqmsg->opc);
1081                 req->rq_status = -ENOTSUPP;
1082                 rc = ptlrpc_error(req);
1083                 RETURN(rc);
1084         }
1085
1086         LASSERT(current->journal_info == NULL);
1087
1088         EXIT;
1089         /* If we're DISCONNECTing, the export_data is already freed */
1090         if (!rc && req->rq_reqmsg->opc != OST_DISCONNECT) {
1091                 struct obd_device *obd  = req->rq_export->exp_obd;
1092                 if (!obd->obd_no_transno) {
1093                         req->rq_repmsg->last_committed =
1094                                 obd->obd_last_committed;
1095                 } else {
1096                         DEBUG_REQ(D_IOCTL, req,
1097                                   "not sending last_committed update");
1098                 }
1099                 CDEBUG(D_INFO, "last_committed "LPU64", xid "LPX64"\n",
1100                        obd->obd_last_committed, req->rq_xid);
1101         }
1102
1103 out:
1104         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_LAST_REPLAY) {
1105                 struct obd_device *obd = req->rq_export->exp_obd;
1106
1107                 if (obd && obd->obd_recovering) {
1108                         DEBUG_REQ(D_HA, req, "LAST_REPLAY, queuing reply");
1109                         return target_queue_final_reply(req, rc);
1110                 }
1111                 /* Lost a race with recovery; let the error path DTRT. */
1112                 rc = req->rq_status = -ENOTCONN;
1113         }
1114
1115         if (!rc)
1116                 oti_to_request(oti, req);
1117
1118         target_send_reply(req, rc, fail);
1119         return 0;
1120 }
1121
1122 static int ost_setup(struct obd_device *obddev, obd_count len, void *buf)
1123 {
1124         struct ost_obd *ost = &obddev->u.ost;
1125         int rc;
1126         ENTRY;
1127
1128         /* Get rid of unneeded supplementary groups */
1129         current->ngroups = 0;
1130         memset(current->groups, 0, sizeof(current->groups));
1131
1132         rc = llog_start_commit_thread();
1133         if (rc < 0)
1134                 RETURN(rc);
1135
1136         ost->ost_service =
1137                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
1138                                 OST_REQUEST_PORTAL, OSC_REPLY_PORTAL,
1139                                 ost_handle, "ost",
1140                                 obddev->obd_proc_entry);
1141         if (ost->ost_service == NULL) {
1142                 CERROR("failed to start service\n");
1143                 RETURN(-ENOMEM);
1144         }
1145
1146         rc = ptlrpc_start_n_threads(obddev, ost->ost_service, OST_NUM_THREADS,
1147                                  "ll_ost");
1148         if (rc)
1149                 GOTO(out, rc = -EINVAL);
1150
1151         ost->ost_create_service =
1152                 ptlrpc_init_svc(OST_NBUFS, OST_BUFSIZE, OST_MAXREQSIZE,
1153                                 OST_CREATE_PORTAL, OSC_REPLY_PORTAL,
1154                                 ost_handle, "ost_create",
1155                                 obddev->obd_proc_entry);
1156         if (ost->ost_create_service == NULL) {
1157                 CERROR("failed to start OST create service\n");
1158                 GOTO(out, rc = -ENOMEM);
1159         }
1160
1161         rc = ptlrpc_start_n_threads(obddev, ost->ost_create_service, 1,
1162                                     "ll_ost_create");
1163         if (rc)
1164                 GOTO(out_create, rc = -EINVAL);
1165
1166         RETURN(0);
1167
1168 out_create:
1169         ptlrpc_unregister_service(ost->ost_create_service);
1170 out:
1171         ptlrpc_unregister_service(ost->ost_service);
1172         RETURN(rc);
1173 }
1174
1175 static int ost_cleanup(struct obd_device *obddev, int flags)
1176 {
1177         struct ost_obd *ost = &obddev->u.ost;
1178         int err = 0;
1179         ENTRY;
1180
1181         spin_lock_bh(&obddev->obd_processing_task_lock);
1182         if (obddev->obd_recovering) {
1183                 target_cancel_recovery_timer(obddev);
1184                 obddev->obd_recovering = 0;
1185         }
1186         spin_unlock_bh(&obddev->obd_processing_task_lock);
1187
1188         ptlrpc_stop_all_threads(ost->ost_service);
1189         ptlrpc_unregister_service(ost->ost_service);
1190
1191         ptlrpc_stop_all_threads(ost->ost_create_service);
1192         ptlrpc_unregister_service(ost->ost_create_service);
1193
1194         RETURN(err);
1195 }
1196
1197 int ost_attach(struct obd_device *dev, obd_count len, void *data)
1198 {
1199         struct lprocfs_static_vars lvars;
1200
1201         lprocfs_init_vars(ost,&lvars);
1202         return lprocfs_obd_attach(dev, lvars.obd_vars);
1203 }
1204
1205 int ost_detach(struct obd_device *dev)
1206 {
1207         return lprocfs_obd_detach(dev);
1208 }
1209
1210 /* use obd ops to offer management infrastructure */
1211 static struct obd_ops ost_obd_ops = {
1212         o_owner:        THIS_MODULE,
1213         o_attach:       ost_attach,
1214         o_detach:       ost_detach,
1215         o_setup:        ost_setup,
1216         o_cleanup:      ost_cleanup,
1217 };
1218
1219 static int __init ost_init(void)
1220 {
1221         struct lprocfs_static_vars lvars;
1222         ENTRY;
1223
1224         lprocfs_init_vars(ost,&lvars);
1225         RETURN(class_register_type(&ost_obd_ops, lvars.module_vars,
1226                                    LUSTRE_OST_NAME));
1227 }
1228
1229 static void /*__exit*/ ost_exit(void)
1230 {
1231         class_unregister_type(LUSTRE_OST_NAME);
1232 }
1233
1234 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1235 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
1236 MODULE_LICENSE("GPL");
1237
1238 module_init(ost_init);
1239 module_exit(ost_exit);