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, 2002 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 #define EXPORT_SYMTAB
  34 #define DEBUG_SUBSYSTEM S_OST
  35
  36 #include <linux/module.h>
  37 #include <linux/obd_ost.h>
  38 #include <linux/lustre_net.h>
  39
  40 static int ost_destroy(struct ost_obd *ost, struct ptlrpc_request *req)
  41 {
  42         struct obd_conn conn;
  43         struct ost_body *body;
  44         int rc, size = sizeof(*body);
  45         ENTRY;
  46
  47         body = lustre_msg_buf(req->rq_reqmsg, 0);
  48         conn.oc_id = body->connid;
  49         conn.oc_dev = ost->ost_tgt;
  50
  51         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
  52         if (rc)
  53                 RETURN(rc);
  54
  55         req->rq_status = obd_destroy(&conn, &body->oa);
  56         RETURN(0);
  57 }
  58
  59 static int ost_getattr(struct ost_obd *ost, struct ptlrpc_request *req)
  60 {
  61         struct obd_conn conn;
  62         struct ost_body *body, *repbody;
  63         int rc, size = sizeof(*body);
  64         ENTRY;
  65
  66         body = lustre_msg_buf(req->rq_reqmsg, 0);
  67         conn.oc_id = body->connid;
  68         conn.oc_dev = ost->ost_tgt;
  69
  70         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
  71         if (rc)
  72                 RETURN(rc);
  73
  74         repbody = lustre_msg_buf(req->rq_repmsg, 0);
  75         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
  76         req->rq_status = obd_getattr(&conn, &repbody->oa);
  77         RETURN(0);
  78 }
  79
  80 static int ost_open(struct ost_obd *ost, struct ptlrpc_request *req)
  81 {
  82         struct obd_conn conn;
  83         struct ost_body *body, *repbody;
  84         int rc, size = sizeof(*body);
  85         ENTRY;
  86
  87         body = lustre_msg_buf(req->rq_reqmsg, 0);
  88         conn.oc_id = body->connid;
  89         conn.oc_dev = ost->ost_tgt;
  90
  91         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
  92         if (rc)
  93                 RETURN(rc);
  94
  95         repbody = lustre_msg_buf(req->rq_repmsg, 0);
  96         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
  97         req->rq_status = obd_open(&conn, &repbody->oa);
  98         RETURN(0);
  99 }
 100
 101 static int ost_close(struct ost_obd *ost, struct ptlrpc_request *req)
 102 {
 103         struct obd_conn conn;
 104         struct ost_body *body, *repbody;
 105         int rc, size = sizeof(*body);
 106         ENTRY;
 107
 108         body = lustre_msg_buf(req->rq_reqmsg, 0);
 109         conn.oc_id = body->connid;
 110         conn.oc_dev = ost->ost_tgt;
 111
 112         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 113         if (rc)
 114                 RETURN(rc);
 115
 116         repbody = lustre_msg_buf(req->rq_repmsg, 0);
 117         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 118         req->rq_status = obd_close(&conn, &repbody->oa);
 119         RETURN(0);
 120 }
 121
 122 static int ost_create(struct ost_obd *ost, struct ptlrpc_request *req)
 123 {
 124         struct obd_conn conn;
 125         struct ost_body *body, *repbody;
 126         int rc, size = sizeof(*body);
 127         ENTRY;
 128
 129         body = lustre_msg_buf(req->rq_reqmsg, 0);
 130         conn.oc_id = body->connid;
 131         conn.oc_dev = ost->ost_tgt;
 132
 133         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 134         if (rc)
 135                 RETURN(rc);
 136
 137         repbody = lustre_msg_buf(req->rq_repmsg, 0);
 138         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 139         req->rq_status = obd_create(&conn, &repbody->oa);
 140         RETURN(0);
 141 }
 142
 143 static int ost_punch(struct ost_obd *ost, struct ptlrpc_request *req)
 144 {
 145         struct obd_conn conn;
 146         struct ost_body *body, *repbody;
 147         int rc, size = sizeof(*body);
 148         ENTRY;
 149
 150         body = lustre_msg_buf(req->rq_reqmsg, 0);
 151         conn.oc_id = body->connid;
 152         conn.oc_dev = ost->ost_tgt;
 153
 154         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 155         if (rc)
 156                 RETURN(rc);
 157
 158         repbody = lustre_msg_buf(req->rq_repmsg, 0);
 159         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 160         req->rq_status = obd_punch(&conn, &repbody->oa,
 161                                    repbody->oa.o_size, repbody->oa.o_blocks);
 162         RETURN(0);
 163 }
 164
 165 static int ost_setattr(struct ost_obd *ost, struct ptlrpc_request *req)
 166 {
 167         struct obd_conn conn;
 168         struct ost_body *body, *repbody;
 169         int rc, size = sizeof(*body);
 170         ENTRY;
 171
 172         body = lustre_msg_buf(req->rq_reqmsg, 0);
 173         conn.oc_id = body->connid;
 174         conn.oc_dev = ost->ost_tgt;
 175
 176         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 177         if (rc)
 178                 RETURN(rc);
 179
 180         repbody = lustre_msg_buf(req->rq_repmsg, 0);
 181         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 182         req->rq_status = obd_setattr(&conn, &repbody->oa);
 183         RETURN(0);
 184 }
 185
 186 static int ost_connect(struct ost_obd *ost, struct ptlrpc_request *req)
 187 {
 188         struct obd_conn conn;
 189         struct ost_body *body;
 190         int rc, size = sizeof(*body);
 191         ENTRY;
 192
 193         conn.oc_dev = ost->ost_tgt;
 194
 195         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 196         if (rc)
 197                 RETURN(rc);
 198
 199         req->rq_status = obd_connect(&conn);
 200
 201         CDEBUG(D_IOCTL, "rep buffer %p, id %d\n", req->rq_repmsg, conn.oc_id);
 202         body = lustre_msg_buf(req->rq_repmsg, 0);
 203         body->connid = conn.oc_id;
 204         RETURN(0);
 205 }
 206
 207 static int ost_disconnect(struct ost_obd *ost, struct ptlrpc_request *req)
 208 {
 209         struct obd_conn conn;
 210         struct ost_body *body;
 211         int rc, size = sizeof(*body);
 212         ENTRY;
 213
 214         body = lustre_msg_buf(req->rq_reqmsg, 0);
 215         conn.oc_id = body->connid;
 216         conn.oc_dev = ost->ost_tgt;
 217
 218         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 219         if (rc)
 220                 RETURN(rc);
 221
 222         CDEBUG(D_IOCTL, "Disconnecting %d\n", conn.oc_id);
 223         req->rq_status = obd_disconnect(&conn);
 224         RETURN(0);
 225 }
 226
 227 static int ost_get_info(struct ost_obd *ost, struct ptlrpc_request *req)
 228 {
 229         struct obd_conn conn;
 230         struct ost_body *body;
 231         int rc, size[2] = {sizeof(*body)};
 232         char *bufs[2] = {NULL, NULL}, *ptr;
 233         ENTRY;
 234
 235         body = lustre_msg_buf(req->rq_reqmsg, 0);
 236         conn.oc_id = body->connid;
 237         conn.oc_dev = ost->ost_tgt;
 238
 239         ptr = lustre_msg_buf(req->rq_reqmsg, 1);
 240         if (!ptr)
 241                 RETURN(-EINVAL);
 242
 243         req->rq_status = obd_get_info(&conn, req->rq_reqmsg->buflens[1], ptr,
 244                                       &(size[1]), (void **)&(bufs[1]));
 245
 246         rc = lustre_pack_msg(2, size, bufs, &req->rq_replen, &req->rq_repmsg);
 247         if (rc)
 248                 CERROR("cannot pack reply\n");
 249
 250         RETURN(rc);
 251 }
 252
 253 static int ost_brw_read(struct ost_obd *obddev, struct ptlrpc_request *req)
 254 {
 255         struct ptlrpc_bulk_desc *bulk = NULL;
 256         struct obd_conn conn;
 257         void *tmp1, *tmp2, *end2;
 258         struct niobuf *nb, *dst, *res = NULL;
 259         struct obd_ioobj *ioo;
 260         struct ost_body *body;
 261         int rc, cmd, i, j, objcount, niocount, size = sizeof(*body);
 262         ENTRY;
 263
 264         body = lustre_msg_buf(req->rq_reqmsg, 0);
 265         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 266         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 267         end2 = (char *)tmp2 + req->rq_reqmsg->buflens[2];
 268         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 269         niocount = req->rq_reqmsg->buflens[2] / sizeof(*nb);
 270         cmd = body->data;
 271
 272         conn.oc_id = body->connid;
 273         conn.oc_dev = req->rq_obd->u.ost.ost_tgt;
 274
 275         for (i = 0; i < objcount; i++) {
 276                 ost_unpack_ioo(&tmp1, &ioo);
 277                 if (tmp2 + ioo->ioo_bufcnt > end2) {
 278                         LBUG();
 279                         rc = -EFAULT;
 280                         break;
 281                 }
 282                 for (j = 0; j < ioo->ioo_bufcnt; j++) {
 283                         ost_unpack_niobuf(&tmp2, &nb);
 284                 }
 285         }
 286
 287         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 288         if (rc)
 289                 RETURN(rc);
 290         OBD_ALLOC(res, sizeof(*res) * niocount);
 291         if (res == NULL)
 292                 RETURN(-ENOMEM);
 293
 294         /* The unpackers move tmp1 and tmp2, so reset them before using */
 295         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 296         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 297         req->rq_status = obd_preprw(cmd, &conn, objcount,
 298                                     tmp1, niocount, tmp2, res);
 299
 300         if (req->rq_status)
 301                 GOTO(out_res, 0);
 302
 303         for (i = 0; i < niocount; i++) {
 304                 bulk = ptlrpc_prep_bulk(req->rq_connection);
 305                 if (bulk == NULL) {
 306                         CERROR("cannot alloc bulk desc\n");
 307                         GOTO(out_res, rc = -ENOMEM);
 308                 }
 309
 310                 dst = &(((struct niobuf *)tmp2)[i]);
 311                 bulk->b_xid = dst->xid;
 312                 bulk->b_buf = (void *)(unsigned long)res[i].addr;
 313                 bulk->b_buflen = PAGE_SIZE;
 314                 rc = ptlrpc_send_bulk(bulk, OST_BULK_PORTAL);
 315                 if (rc)
 316                         GOTO(out_bulk, rc);
 317                 wait_event_interruptible(bulk->b_waitq,
 318                                          ptlrpc_check_bulk_sent(bulk));
 319
 320                 if (bulk->b_flags & PTL_RPC_FL_INTR)
 321                         GOTO(out_bulk, 0);
 322
 323                 ptlrpc_free_bulk(bulk);
 324         }
 325         bulk = NULL;
 326
 327         /* The unpackers move tmp1 and tmp2, so reset them before using */
 328         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 329         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 330         req->rq_status = obd_commitrw(cmd, &conn, objcount,
 331                                       tmp1, niocount, res);
 332
 333         EXIT;
 334 out_bulk:
 335         if (bulk != NULL)
 336                 ptlrpc_free_bulk(bulk);
 337 out_res:
 338         if (res != NULL)
 339                 OBD_FREE(res, sizeof(*res) * niocount);
 340
 341         return 0;
 342 }
 343
 344 static int ost_commit_page(struct obd_conn *conn, struct page *page)
 345 {
 346         struct obd_ioobj obj;
 347         struct niobuf buf;
 348         int rc;
 349         ENTRY;
 350
 351         memset(&buf, 0, sizeof(buf));
 352         memset(&obj, 0, sizeof(obj));
 353
 354         buf.page = page;
 355         obj.ioo_bufcnt = 1;
 356
 357         rc = obd_commitrw(OBD_BRW_WRITE, conn, 1, &obj, 1, &buf);
 358         RETURN(rc);
 359 }
 360
 361 static int ost_brw_write_cb(struct ptlrpc_bulk_desc *bulk, void *data)
 362 {
 363         int rc;
 364
 365         ENTRY;
 366
 367         rc = ost_commit_page(&bulk->b_conn, bulk->b_page);
 368         if (rc)
 369                 CERROR("ost_commit_page failed: %d\n", rc);
 370
 371         RETURN(rc);
 372 }
 373
 374 static int ost_brw_write(struct ost_obd *obddev, struct ptlrpc_request *req)
 375 {
 376         struct obd_conn conn;
 377         struct niobuf *nb, *res;
 378         struct obd_ioobj *ioo;
 379         struct ost_body *body;
 380         int cmd, rc, i, j, objcount, niocount, size[2] = {sizeof(*body)};
 381         void *tmp1, *tmp2, *end2;
 382         ENTRY;
 383
 384         body = lustre_msg_buf(req->rq_reqmsg, 0);
 385         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 386         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 387         end2 = (char *)tmp2 + req->rq_reqmsg->buflens[2];
 388         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 389         niocount = req->rq_reqmsg->buflens[2] / sizeof(*nb);
 390         cmd = body->data;
 391
 392         conn.oc_id = body->connid;
 393         conn.oc_dev = req->rq_obd->u.ost.ost_tgt;
 394
 395         for (i = 0; i < objcount; i++) {
 396                 ost_unpack_ioo((void *)&tmp1, &ioo);
 397                 if (tmp2 + ioo->ioo_bufcnt > end2) {
 398                         rc = -EFAULT;
 399                         break;
 400                 }
 401                 for (j = 0; j < ioo->ioo_bufcnt; j++) {
 402                         ost_unpack_niobuf((void *)&tmp2, &nb);
 403                 }
 404         }
 405
 406         size[1] = niocount * sizeof(*nb);
 407         rc = lustre_pack_msg(2, size, NULL, &req->rq_replen, &req->rq_repmsg);
 408         if (rc)
 409                 RETURN(rc);
 410
 411         res = lustre_msg_buf(req->rq_repmsg, 1);
 412
 413         /* The unpackers move tmp1 and tmp2, so reset them before using */
 414         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 415         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 416         req->rq_status = obd_preprw(cmd, &conn, objcount,
 417                                     tmp1, niocount, tmp2, res);
 418
 419         if (req->rq_status)
 420                 GOTO(out, 0);
 421
 422         for (i = 0; i < niocount; i++, res++) {
 423                 struct ptlrpc_bulk_desc *bulk;
 424                 struct ptlrpc_service *srv = req->rq_obd->u.ost.ost_service;
 425
 426                 bulk = ptlrpc_prep_bulk(req->rq_connection);
 427                 if (bulk == NULL)
 428                         GOTO(out, rc = -ENOMEM);
 429
 430                 spin_lock(&srv->srv_lock);
 431                 bulk->b_xid = srv->srv_xid++;
 432                 spin_unlock(&srv->srv_lock);
 433
 434                 res->xid = HTON__u32(bulk->b_xid);
 435
 436                 bulk->b_buf = (void *)(unsigned long)res->addr;
 437                 bulk->b_cb = ost_brw_write_cb;
 438                 bulk->b_page = res->page;
 439                 memcpy(&(bulk->b_conn), &conn, sizeof(conn));
 440                 bulk->b_buflen = PAGE_SIZE;
 441                 bulk->b_portal = OSC_BULK_PORTAL;
 442                 rc = ptlrpc_register_bulk(bulk);
 443                 if (rc)
 444                         GOTO(out, rc);
 445         }
 446
 447         EXIT;
 448  out:
 449         /* FIXME: should we return 'rc' here? */
 450         return 0;
 451 }
 452
 453 static int ost_brw(struct ost_obd *obddev, struct ptlrpc_request *req)
 454 {
 455         struct ost_body *body = lustre_msg_buf(req->rq_reqmsg, 0);
 456
 457         if (body->data == OBD_BRW_READ)
 458                 return ost_brw_read(obddev, req);
 459         else
 460                 return ost_brw_write(obddev, req);
 461 }
 462
 463 static int ost_handle(struct obd_device *obddev, struct ptlrpc_service *svc,
 464                       struct ptlrpc_request *req)
 465 {
 466         int rc;
 467         struct ost_obd *ost = &obddev->u.ost;
 468         ENTRY;
 469
 470         rc = lustre_unpack_msg(req->rq_reqmsg, req->rq_reqlen);
 471         if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_HANDLE_UNPACK)) {
 472                 CERROR("lustre_mds: Invalid request\n");
 473                 GOTO(out, rc);
 474         }
 475
 476         if (req->rq_reqmsg->type != PTL_RPC_MSG_REQUEST) {
 477                 CERROR("lustre_mds: wrong packet type sent %d\n",
 478                        req->rq_reqmsg->type);
 479                 GOTO(out, rc = -EINVAL);
 480         }
 481
 482         switch (req->rq_reqmsg->opc) {
 483         case OST_CONNECT:
 484                 CDEBUG(D_INODE, "connect\n");
 485                 OBD_FAIL_RETURN(OBD_FAIL_OST_CONNECT_NET, 0);
 486                 rc = ost_connect(ost, req);
 487                 break;
 488         case OST_DISCONNECT:
 489                 CDEBUG(D_INODE, "disconnect\n");
 490                 OBD_FAIL_RETURN(OBD_FAIL_OST_DISCONNECT_NET, 0);
 491                 rc = ost_disconnect(ost, req);
 492                 break;
 493         case OST_GET_INFO:
 494                 CDEBUG(D_INODE, "get_info\n");
 495                 OBD_FAIL_RETURN(OBD_FAIL_OST_GET_INFO_NET, 0);
 496                 rc = ost_get_info(ost, req);
 497                 break;
 498         case OST_CREATE:
 499                 CDEBUG(D_INODE, "create\n");
 500                 OBD_FAIL_RETURN(OBD_FAIL_OST_CREATE_NET, 0);
 501                 rc = ost_create(ost, req);
 502                 break;
 503         case OST_DESTROY:
 504                 CDEBUG(D_INODE, "destroy\n");
 505                 OBD_FAIL_RETURN(OBD_FAIL_OST_DESTROY_NET, 0);
 506                 rc = ost_destroy(ost, req);
 507                 break;
 508         case OST_GETATTR:
 509                 CDEBUG(D_INODE, "getattr\n");
 510                 OBD_FAIL_RETURN(OBD_FAIL_OST_GETATTR_NET, 0);
 511                 rc = ost_getattr(ost, req);
 512                 break;
 513         case OST_SETATTR:
 514                 CDEBUG(D_INODE, "setattr\n");
 515                 OBD_FAIL_RETURN(OBD_FAIL_OST_SETATTR_NET, 0);
 516                 rc = ost_setattr(ost, req);
 517                 break;
 518         case OST_OPEN:
 519                 CDEBUG(D_INODE, "setattr\n");
 520                 OBD_FAIL_RETURN(OBD_FAIL_OST_OPEN_NET, 0);
 521                 rc = ost_open(ost, req);
 522                 break;
 523         case OST_CLOSE:
 524                 CDEBUG(D_INODE, "setattr\n");
 525                 OBD_FAIL_RETURN(OBD_FAIL_OST_CLOSE_NET, 0);
 526                 rc = ost_close(ost, req);
 527                 break;
 528         case OST_BRW:
 529                 CDEBUG(D_INODE, "brw\n");
 530                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 531                 rc = ost_brw(ost, req);
 532                 break;
 533         case OST_PUNCH:
 534                 CDEBUG(D_INODE, "punch\n");
 535                 OBD_FAIL_RETURN(OBD_FAIL_OST_PUNCH_NET, 0);
 536                 rc = ost_punch(ost, req);
 537                 break;
 538         default:
 539                 req->rq_status = -ENOTSUPP;
 540                 rc = ptlrpc_error(svc, req);
 541                 RETURN(rc);
 542         }
 543
 544         EXIT;
 545 out:
 546         //req->rq_status = rc;
 547         if (rc) {
 548                 CERROR("ost: processing error %d\n", rc);
 549                 ptlrpc_error(svc, req);
 550         } else {
 551                 CDEBUG(D_INODE, "sending reply\n");
 552                 ptlrpc_reply(svc, req);
 553         }
 554
 555         return 0;
 556 }
 557
 558 /* mount the file system (secretly) */
 559 static int ost_setup(struct obd_device *obddev, obd_count len, void *buf)
 560 {
 561         struct obd_ioctl_data* data = buf;
 562         struct ost_obd *ost = &obddev->u.ost;
 563         struct obd_device *tgt;
 564         int err;
 565         ENTRY;
 566
 567         if (data->ioc_dev < 0 || data->ioc_dev > MAX_OBD_DEVICES)
 568                 RETURN(-ENODEV);
 569
 570         MOD_INC_USE_COUNT;
 571         tgt = &obd_dev[data->ioc_dev];
 572         ost->ost_tgt = tgt;
 573         if (!(tgt->obd_flags & OBD_ATTACHED) ||
 574             !(tgt->obd_flags & OBD_SET_UP)) {
 575                 CERROR("device not attached or not set up (%d)\n",
 576                        data->ioc_dev);
 577                 GOTO(error_dec, err = -EINVAL);
 578         }
 579
 580         ost->ost_conn.oc_dev = tgt;
 581         err = obd_connect(&ost->ost_conn);
 582         if (err) {
 583                 CERROR("fail to connect to device %d\n", data->ioc_dev);
 584                 GOTO(error_dec, err = -EINVAL);
 585         }
 586
 587         ost->ost_service = ptlrpc_init_svc(128 * 1024,
 588                                            OST_REQUEST_PORTAL, OSC_REPLY_PORTAL,
 589                                            "self", ost_handle);
 590         if (!ost->ost_service) {
 591                 CERROR("failed to start service\n");
 592                 GOTO(error_disc, err = -EINVAL);
 593         }
 594
 595         err = ptlrpc_start_thread(obddev, ost->ost_service, "lustre_ost");
 596         if (err)
 597                 GOTO(error_disc, err = -EINVAL);
 598 #if 0
 599         err = ptlrpc_start_thread(obddev, ost->ost_service, "lustre_ost");
 600         if (err)
 601                 GOTO(error_disc, err = -EINVAL);
 602 #endif
 603
 604         RETURN(0);
 605
 606 error_disc:
 607         obd_disconnect(&ost->ost_conn);
 608 error_dec:
 609         MOD_DEC_USE_COUNT;
 610         RETURN(err);
 611 }
 612
 613 static int ost_cleanup(struct obd_device * obddev)
 614 {
 615         struct ost_obd *ost = &obddev->u.ost;
 616         int err;
 617
 618         ENTRY;
 619
 620         if ( !list_empty(&obddev->obd_gen_clients) ) {
 621                 CERROR("still has clients!\n");
 622                 RETURN(-EBUSY);
 623         }
 624
 625         ptlrpc_stop_all_threads(ost->ost_service);
 626         rpc_unregister_service(ost->ost_service);
 627
 628         if (!list_empty(&ost->ost_service->srv_reqs)) {
 629                 // XXX reply with errors and clean up
 630                 CERROR("Request list not empty!\n");
 631         }
 632         OBD_FREE(ost->ost_service, sizeof(*ost->ost_service));
 633
 634         err = obd_disconnect(&ost->ost_conn);
 635         if (err) {
 636                 CERROR("lustre ost: fail to disconnect device\n");
 637                 RETURN(-EINVAL);
 638         }
 639
 640         MOD_DEC_USE_COUNT;
 641         RETURN(0);
 642 }
 643
 644 /* use obd ops to offer management infrastructure */
 645 static struct obd_ops ost_obd_ops = {
 646         o_setup:       ost_setup,
 647         o_cleanup:     ost_cleanup,
 648 };
 649
 650 static int __init ost_init(void)
 651 {
 652         obd_register_type(&ost_obd_ops, LUSTRE_OST_NAME);
 653         return 0;
 654 }
 655
 656 static void __exit ost_exit(void)
 657 {
 658         obd_unregister_type(LUSTRE_OST_NAME);
 659 }
 660
 661 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
 662 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
 663 MODULE_LICENSE("GPL");
 664
 665 module_init(ost_init);
 666 module_exit(ost_exit);