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_vec = NULL, *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         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 287         if (rc)
 288                 RETURN(rc);
 289         OBD_ALLOC(res, sizeof(*res) * niocount);
 290         if (res == NULL)
 291                 RETURN(-ENOMEM);
 292
 293         /* The unpackers move tmp1 and tmp2, so reset them before using */
 294         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 295         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 296         req->rq_status = obd_preprw(cmd, &conn, objcount,
 297                                     tmp1, niocount, tmp2, res);
 298
 299         if (req->rq_status)
 300                 GOTO(out, 0);
 301
 302         for (i = 0; i < niocount; i++) {
 303                 bulk = ptlrpc_prep_bulk(req->rq_connection);
 304                 if (bulk == NULL) {
 305                         CERROR("cannot alloc bulk desc\n");
 306                         GOTO(out, rc = -ENOMEM);
 307                 }
 308
 309                 dst = &(((struct niobuf *)tmp2)[i]);
 310                 bulk->b_xid = dst->xid;
 311                 bulk->b_buf = (void *)(unsigned long)res[i].addr;
 312                 bulk->b_buflen = PAGE_SIZE;
 313                 rc = ptlrpc_send_bulk(bulk, OST_BULK_PORTAL);
 314                 if (rc)
 315                         GOTO(out, rc);
 316                 wait_event_interruptible(bulk->b_waitq,
 317                                          ptlrpc_check_bulk_sent(bulk));
 318
 319                 if (bulk->b_flags & PTL_RPC_FL_INTR)
 320                         GOTO(out, 0);
 321
 322                 ptlrpc_free_bulk(bulk);
 323         }
 324         bulk = NULL;
 325
 326         /* The unpackers move tmp1 and tmp2, so reset them before using */
 327         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 328         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 329         req->rq_status = obd_commitrw(cmd, &conn, objcount,
 330                                       tmp1, niocount, res);
 331
 332         EXIT;
 333  out:
 334         if (res != NULL)
 335                 OBD_FREE(res, sizeof(*res) * niocount);
 336         if (bulk != NULL)
 337                 ptlrpc_free_bulk(bulk);
 338         if (bulk_vec != NULL) {
 339                 for (i = 0; i < niocount; i++)
 340                         if (bulk_vec[i] != NULL)
 341                                 ptlrpc_free_bulk(bulk_vec[i]);
 342                 OBD_FREE(bulk_vec, niocount * sizeof(*bulk_vec));
 343         }
 344
 345         return 0;
 346 }
 347
 348 static int ost_commit_page(struct obd_conn *conn, struct page *page)
 349 {
 350         struct obd_ioobj obj;
 351         struct niobuf buf;
 352         int rc;
 353         ENTRY;
 354
 355         memset(&buf, 0, sizeof(buf));
 356         memset(&obj, 0, sizeof(obj));
 357
 358         buf.page = page;
 359         obj.ioo_bufcnt = 1;
 360
 361         rc = obd_commitrw(OBD_BRW_WRITE, conn, 1, &obj, 1, &buf);
 362         RETURN(rc);
 363 }
 364
 365 static int ost_brw_write_cb(struct ptlrpc_bulk_desc *bulk, void *data)
 366 {
 367         int rc;
 368
 369         ENTRY;
 370
 371         rc = ost_commit_page(&bulk->b_conn, bulk->b_page);
 372         if (rc)
 373                 CERROR("ost_commit_page failed: %d\n", rc);
 374
 375         RETURN(rc);
 376 }
 377
 378 static int ost_brw_write(struct ost_obd *obddev, struct ptlrpc_request *req)
 379 {
 380         struct obd_conn conn;
 381         struct niobuf *nb, *res;
 382         struct obd_ioobj *ioo;
 383         struct ost_body *body;
 384         int cmd, rc, i, j, objcount, niocount, size[2] = {sizeof(*body)};
 385         void *tmp1, *tmp2, *end2;
 386         ENTRY;
 387
 388         body = lustre_msg_buf(req->rq_reqmsg, 0);
 389         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 390         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 391         end2 = (char *)tmp2 + req->rq_reqmsg->buflens[2];
 392         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 393         niocount = req->rq_reqmsg->buflens[2] / sizeof(*nb);
 394         cmd = body->data;
 395
 396         conn.oc_id = body->connid;
 397         conn.oc_dev = req->rq_obd->u.ost.ost_tgt;
 398
 399         for (i = 0; i < objcount; i++) {
 400                 ost_unpack_ioo((void *)&tmp1, &ioo);
 401                 if (tmp2 + ioo->ioo_bufcnt > end2) {
 402                         rc = -EFAULT;
 403                         break;
 404                 }
 405                 for (j = 0; j < ioo->ioo_bufcnt; j++)
 406                         ost_unpack_niobuf((void *)&tmp2, &nb);
 407         }
 408
 409         size[1] = niocount * sizeof(*nb);
 410         rc = lustre_pack_msg(2, size, NULL, &req->rq_replen, &req->rq_repmsg);
 411         if (rc)
 412                 RETURN(rc);
 413
 414         res = lustre_msg_buf(req->rq_repmsg, 1);
 415
 416         /* The unpackers move tmp1 and tmp2, so reset them before using */
 417         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 418         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 419         req->rq_status = obd_preprw(cmd, &conn, objcount,
 420                                     tmp1, niocount, tmp2, res);
 421
 422         if (req->rq_status)
 423                 GOTO(out, 0);
 424
 425         for (i = 0; i < niocount; i++, res++) {
 426                 struct ptlrpc_bulk_desc *bulk;
 427                 struct ptlrpc_service *srv = req->rq_obd->u.ost.ost_service;
 428
 429                 bulk = ptlrpc_prep_bulk(req->rq_connection);
 430                 if (bulk == NULL)
 431                         GOTO(out, rc = -ENOMEM);
 432
 433                 spin_lock(&srv->srv_lock);
 434                 bulk->b_xid = srv->srv_xid++;
 435                 spin_unlock(&srv->srv_lock);
 436
 437                 res->xid = HTON__u32(bulk->b_xid);
 438
 439                 bulk->b_buf = (void *)(unsigned long)res->addr;
 440                 bulk->b_cb = ost_brw_write_cb;
 441                 bulk->b_page = res->page;
 442                 memcpy(&(bulk->b_conn), &conn, sizeof(conn));
 443                 bulk->b_buflen = PAGE_SIZE;
 444                 bulk->b_portal = OSC_BULK_PORTAL;
 445                 rc = ptlrpc_register_bulk(bulk);
 446                 if (rc)
 447                         GOTO(out, rc);
 448         }
 449
 450         EXIT;
 451  out:
 452         /* FIXME: should we return 'rc' here? */
 453         return 0;
 454 }
 455
 456 static int ost_brw(struct ost_obd *obddev, struct ptlrpc_request *req)
 457 {
 458         struct ost_body *body = lustre_msg_buf(req->rq_reqmsg, 0);
 459
 460         if (body->data == OBD_BRW_READ)
 461                 return ost_brw_read(obddev, req);
 462         else
 463                 return ost_brw_write(obddev, req);
 464 }
 465
 466 static int ost_handle(struct obd_device *obddev, struct ptlrpc_service *svc,
 467                       struct ptlrpc_request *req)
 468 {
 469         int rc;
 470         struct ost_obd *ost = &obddev->u.ost;
 471         ENTRY;
 472
 473         rc = lustre_unpack_msg(req->rq_reqmsg, req->rq_reqlen);
 474         if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_HANDLE_UNPACK)) {
 475                 CERROR("lustre_mds: Invalid request\n");
 476                 GOTO(out, rc);
 477         }
 478
 479         if (req->rq_reqmsg->type != PTL_RPC_MSG_REQUEST) {
 480                 CERROR("lustre_mds: wrong packet type sent %d\n",
 481                        req->rq_reqmsg->type);
 482                 GOTO(out, rc = -EINVAL);
 483         }
 484
 485         switch (req->rq_reqmsg->opc) {
 486         case OST_CONNECT:
 487                 CDEBUG(D_INODE, "connect\n");
 488                 OBD_FAIL_RETURN(OBD_FAIL_OST_CONNECT_NET, 0);
 489                 rc = ost_connect(ost, req);
 490                 break;
 491         case OST_DISCONNECT:
 492                 CDEBUG(D_INODE, "disconnect\n");
 493                 OBD_FAIL_RETURN(OBD_FAIL_OST_DISCONNECT_NET, 0);
 494                 rc = ost_disconnect(ost, req);
 495                 break;
 496         case OST_GET_INFO:
 497                 CDEBUG(D_INODE, "get_info\n");
 498                 OBD_FAIL_RETURN(OBD_FAIL_OST_GET_INFO_NET, 0);
 499                 rc = ost_get_info(ost, req);
 500                 break;
 501         case OST_CREATE:
 502                 CDEBUG(D_INODE, "create\n");
 503                 OBD_FAIL_RETURN(OBD_FAIL_OST_CREATE_NET, 0);
 504                 rc = ost_create(ost, req);
 505                 break;
 506         case OST_DESTROY:
 507                 CDEBUG(D_INODE, "destroy\n");
 508                 OBD_FAIL_RETURN(OBD_FAIL_OST_DESTROY_NET, 0);
 509                 rc = ost_destroy(ost, req);
 510                 break;
 511         case OST_GETATTR:
 512                 CDEBUG(D_INODE, "getattr\n");
 513                 OBD_FAIL_RETURN(OBD_FAIL_OST_GETATTR_NET, 0);
 514                 rc = ost_getattr(ost, req);
 515                 break;
 516         case OST_SETATTR:
 517                 CDEBUG(D_INODE, "setattr\n");
 518                 OBD_FAIL_RETURN(OBD_FAIL_OST_SETATTR_NET, 0);
 519                 rc = ost_setattr(ost, req);
 520                 break;
 521         case OST_OPEN:
 522                 CDEBUG(D_INODE, "setattr\n");
 523                 OBD_FAIL_RETURN(OBD_FAIL_OST_OPEN_NET, 0);
 524                 rc = ost_open(ost, req);
 525                 break;
 526         case OST_CLOSE:
 527                 CDEBUG(D_INODE, "setattr\n");
 528                 OBD_FAIL_RETURN(OBD_FAIL_OST_CLOSE_NET, 0);
 529                 rc = ost_close(ost, req);
 530                 break;
 531         case OST_BRW:
 532                 CDEBUG(D_INODE, "brw\n");
 533                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 534                 rc = ost_brw(ost, req);
 535                 break;
 536         case OST_PUNCH:
 537                 CDEBUG(D_INODE, "punch\n");
 538                 OBD_FAIL_RETURN(OBD_FAIL_OST_PUNCH_NET, 0);
 539                 rc = ost_punch(ost, req);
 540                 break;
 541         default:
 542                 req->rq_status = -ENOTSUPP;
 543                 rc = ptlrpc_error(svc, req);
 544                 RETURN(rc);
 545         }
 546
 547         EXIT;
 548 out:
 549         //req->rq_status = rc;
 550         if (rc) {
 551                 CERROR("ost: processing error %d\n", rc);
 552                 ptlrpc_error(svc, req);
 553         } else {
 554                 CDEBUG(D_INODE, "sending reply\n");
 555                 ptlrpc_reply(svc, req);
 556         }
 557
 558         return 0;
 559 }
 560
 561 /* mount the file system (secretly) */
 562 static int ost_setup(struct obd_device *obddev, obd_count len, void *buf)
 563 {
 564         struct obd_ioctl_data* data = buf;
 565         struct ost_obd *ost = &obddev->u.ost;
 566         struct obd_device *tgt;
 567         int err;
 568         ENTRY;
 569
 570         if (data->ioc_dev < 0 || data->ioc_dev > MAX_OBD_DEVICES)
 571                 RETURN(-ENODEV);
 572
 573         MOD_INC_USE_COUNT;
 574         tgt = &obd_dev[data->ioc_dev];
 575         ost->ost_tgt = tgt;
 576         if (!(tgt->obd_flags & OBD_ATTACHED) ||
 577             !(tgt->obd_flags & OBD_SET_UP)) {
 578                 CERROR("device not attached or not set up (%d)\n",
 579                        data->ioc_dev);
 580                 GOTO(error_dec, err = -EINVAL);
 581         }
 582
 583         ost->ost_conn.oc_dev = tgt;
 584         err = obd_connect(&ost->ost_conn);
 585         if (err) {
 586                 CERROR("fail to connect to device %d\n", data->ioc_dev);
 587                 GOTO(error_dec, err = -EINVAL);
 588         }
 589
 590         ost->ost_service = ptlrpc_init_svc(128 * 1024,
 591                                            OST_REQUEST_PORTAL, OSC_REPLY_PORTAL,
 592                                            "self", ost_handle);
 593         if (!ost->ost_service) {
 594                 CERROR("failed to start service\n");
 595                 GOTO(error_disc, err = -EINVAL);
 596         }
 597
 598         err = ptlrpc_start_thread(obddev, ost->ost_service, "lustre_ost");
 599         if (err)
 600                 GOTO(error_disc, err = -EINVAL);
 601 #if 0
 602         err = ptlrpc_start_thread(obddev, ost->ost_service, "lustre_ost");
 603         if (err)
 604                 GOTO(error_disc, err = -EINVAL);
 605 #endif
 606
 607         RETURN(0);
 608
 609 error_disc:
 610         obd_disconnect(&ost->ost_conn);
 611 error_dec:
 612         MOD_DEC_USE_COUNT;
 613         RETURN(err);
 614 }
 615
 616 static int ost_cleanup(struct obd_device * obddev)
 617 {
 618         struct ost_obd *ost = &obddev->u.ost;
 619         int err;
 620
 621         ENTRY;
 622
 623         if ( !list_empty(&obddev->obd_gen_clients) ) {
 624                 CERROR("still has clients!\n");
 625                 RETURN(-EBUSY);
 626         }
 627
 628         ptlrpc_stop_all_threads(ost->ost_service);
 629         rpc_unregister_service(ost->ost_service);
 630
 631         if (!list_empty(&ost->ost_service->srv_reqs)) {
 632                 // XXX reply with errors and clean up
 633                 CERROR("Request list not empty!\n");
 634         }
 635         OBD_FREE(ost->ost_service, sizeof(*ost->ost_service));
 636
 637         err = obd_disconnect(&ost->ost_conn);
 638         if (err) {
 639                 CERROR("lustre ost: fail to disconnect device\n");
 640                 RETURN(-EINVAL);
 641         }
 642
 643         MOD_DEC_USE_COUNT;
 644         RETURN(0);
 645 }
 646
 647 /* use obd ops to offer management infrastructure */
 648 static struct obd_ops ost_obd_ops = {
 649         o_setup:       ost_setup,
 650         o_cleanup:     ost_cleanup,
 651 };
 652
 653 static int __init ost_init(void)
 654 {
 655         obd_register_type(&ost_obd_ops, LUSTRE_OST_NAME);
 656         return 0;
 657 }
 658
 659 static void __exit ost_exit(void)
 660 {
 661         obd_unregister_type(LUSTRE_OST_NAME);
 662 }
 663
 664 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
 665 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
 666 MODULE_LICENSE("GPL");
 667
 668 module_init(ost_init);
 669 module_exit(ost_exit);