lustre/osc/osc_request.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copryright (C) 2001, 2002 Cluster File Systems, Inc.
   5  *
   6  *  This code is issued under the GNU General Public License.
   7  *  See the file COPYING in this distribution
   8  *
   9  *  Author Peter Braam <braam@clusterfs.com>
  10  *
  11  *  This server is single threaded at present (but can easily be multi
  12  *  threaded). For testing and management it is treated as an
  13  *  obd_device, although it does not export a full OBD method table
  14  *  (the requests are coming in over the wire, so object target
  15  *  modules do not have a full method table.)
  16  *
  17  */
  18
  19 #define EXPORT_SYMTAB
  20 #define DEBUG_SUBSYSTEM S_OSC
  21
  22 #include <linux/module.h>
  23 #include <linux/lustre_dlm.h>
  24 #include <linux/obd_ost.h>
  25
  26 static void osc_con2cl(struct obd_conn *conn, struct ptlrpc_client **cl,
  27                        struct ptlrpc_connection **connection)
  28 {
  29         struct osc_obd *osc = &conn->oc_dev->u.osc;
  30         *cl = osc->osc_client;
  31         *connection = osc->osc_conn;
  32 }
  33
  34 static void osc_con2dlmcl(struct obd_conn *conn, struct ptlrpc_client **cl,
  35                           struct ptlrpc_connection **connection)
  36 {
  37         struct osc_obd *osc = &conn->oc_dev->u.osc;
  38         *cl = osc->osc_ldlm_client;
  39         *connection = osc->osc_conn;
  40 }
  41
  42 static int osc_connect(struct obd_conn *conn)
  43 {
  44         struct ptlrpc_request *request;
  45         struct ptlrpc_client *cl;
  46         struct ptlrpc_connection *connection;
  47         struct ost_body *body;
  48         int rc, size = sizeof(*body);
  49         ENTRY;
  50
  51         osc_con2cl(conn, &cl, &connection);
  52         request = ptlrpc_prep_req(cl, connection, OST_CONNECT, 0, NULL, NULL);
  53         if (!request)
  54                 RETURN(-ENOMEM);
  55
  56         request->rq_replen = lustre_msg_size(1, &size);
  57
  58         rc = ptlrpc_queue_wait(request);
  59         rc = ptlrpc_check_status(request, rc);
  60         if (rc) {
  61                 CERROR("%s failed: rc = %d\n", __FUNCTION__, rc);
  62                 GOTO(out, rc);
  63         }
  64
  65         body = lustre_msg_buf(request->rq_repmsg, 0);
  66         CDEBUG(D_INODE, "received connid %d\n", body->connid);
  67
  68         conn->oc_id = body->connid;
  69         EXIT;
  70  out:
  71         ptlrpc_free_req(request);
  72         return rc;
  73 }
  74
  75 static int osc_disconnect(struct obd_conn *conn)
  76 {
  77         struct ptlrpc_request *request;
  78         struct ptlrpc_client *cl;
  79         struct ptlrpc_connection *connection;
  80         struct ost_body *body;
  81         int rc, size = sizeof(*body);
  82         ENTRY;
  83
  84         osc_con2cl(conn, &cl, &connection);
  85         request = ptlrpc_prep_req(cl, connection, OST_DISCONNECT, 1, &size, NULL);
  86         if (!request)
  87                 RETURN(-ENOMEM);
  88
  89         body = lustre_msg_buf(request->rq_reqmsg, 0);
  90         body->connid = conn->oc_id;
  91
  92         request->rq_replen = lustre_msg_size(1, &size);
  93
  94         rc = ptlrpc_queue_wait(request);
  95         GOTO(out, rc);
  96  out:
  97         ptlrpc_free_req(request);
  98         return rc;
  99 }
 100
 101 static int osc_getattr(struct obd_conn *conn, struct obdo *oa)
 102 {
 103         struct ptlrpc_request *request;
 104         struct ptlrpc_client *cl;
 105         struct ptlrpc_connection *connection;
 106         struct ost_body *body;
 107         int rc, size = sizeof(*body);
 108         ENTRY;
 109
 110         osc_con2cl(conn, &cl, &connection);
 111         request = ptlrpc_prep_req(cl, connection, OST_GETATTR, 1, &size, NULL);
 112         if (!request)
 113                 RETURN(-ENOMEM);
 114
 115         body = lustre_msg_buf(request->rq_reqmsg, 0);
 116         memcpy(&body->oa, oa, sizeof(*oa));
 117         body->connid = conn->oc_id;
 118         body->oa.o_valid = ~0;
 119
 120         request->rq_replen = lustre_msg_size(1, &size);
 121
 122         rc = ptlrpc_queue_wait(request);
 123         rc = ptlrpc_check_status(request, rc);
 124         if (rc) {
 125                 CERROR("%s failed: rc = %d\n", __FUNCTION__, rc);
 126                 GOTO(out, rc);
 127         }
 128
 129         body = lustre_msg_buf(request->rq_repmsg, 0);
 130         CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
 131         if (oa)
 132                 memcpy(oa, &body->oa, sizeof(*oa));
 133
 134         EXIT;
 135  out:
 136         ptlrpc_free_req(request);
 137         return 0;
 138 }
 139
 140 static int osc_open(struct obd_conn *conn, struct obdo *oa)
 141 {
 142         struct ptlrpc_request *request;
 143         struct ptlrpc_client *cl;
 144         struct ptlrpc_connection *connection;
 145         struct ost_body *body;
 146         int rc, size = sizeof(*body);
 147         ENTRY;
 148
 149         osc_con2cl(conn, &cl, &connection);
 150         request = ptlrpc_prep_req(cl, connection, OST_OPEN, 1, &size, NULL);
 151         if (!request)
 152                 RETURN(-ENOMEM);
 153
 154         body = lustre_msg_buf(request->rq_reqmsg, 0);
 155         memcpy(&body->oa, oa, sizeof(*oa));
 156         body->connid = conn->oc_id;
 157         if (body->oa.o_valid != (OBD_MD_FLMODE | OBD_MD_FLID))
 158                 LBUG();
 159
 160         request->rq_replen = lustre_msg_size(1, &size);
 161
 162         rc = ptlrpc_queue_wait(request);
 163         rc = ptlrpc_check_status(request, rc);
 164         if (rc)
 165                 GOTO(out, rc);
 166
 167         body = lustre_msg_buf(request->rq_repmsg, 0);
 168         CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
 169         if (oa)
 170                 memcpy(oa, &body->oa, sizeof(*oa));
 171
 172         EXIT;
 173  out:
 174         ptlrpc_free_req(request);
 175         return 0;
 176 }
 177
 178 static int osc_close(struct obd_conn *conn, struct obdo *oa)
 179 {
 180         struct ptlrpc_request *request;
 181         struct ptlrpc_client *cl;
 182         struct ptlrpc_connection *connection;
 183         struct ost_body *body;
 184         int rc, size = sizeof(*body);
 185         ENTRY;
 186
 187         osc_con2cl(conn, &cl, &connection);
 188         request = ptlrpc_prep_req(cl, connection, OST_CLOSE, 1, &size, NULL);
 189         if (!request)
 190                 RETURN(-ENOMEM);
 191
 192         body = lustre_msg_buf(request->rq_reqmsg, 0);
 193         memcpy(&body->oa, oa, sizeof(*oa));
 194         body->connid = conn->oc_id;
 195
 196         request->rq_replen = lustre_msg_size(1, &size);
 197
 198         rc = ptlrpc_queue_wait(request);
 199         rc = ptlrpc_check_status(request, rc);
 200         if (rc)
 201                 GOTO(out, rc);
 202
 203         body = lustre_msg_buf(request->rq_repmsg, 0);
 204         CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
 205         if (oa)
 206                 memcpy(oa, &body->oa, sizeof(*oa));
 207
 208         EXIT;
 209  out:
 210         ptlrpc_free_req(request);
 211         return 0;
 212 }
 213
 214 static int osc_setattr(struct obd_conn *conn, struct obdo *oa)
 215 {
 216         struct ptlrpc_request *request;
 217         struct ptlrpc_client *cl;
 218         struct ptlrpc_connection *connection;
 219         struct ost_body *body;
 220         int rc, size = sizeof(*body);
 221         ENTRY;
 222
 223         osc_con2cl(conn, &cl, &connection);
 224         request = ptlrpc_prep_req(cl, connection, OST_SETATTR, 1, &size, NULL);
 225         if (!request)
 226                 RETURN(-ENOMEM);
 227
 228         body = lustre_msg_buf(request->rq_reqmsg, 0);
 229         memcpy(&body->oa, oa, sizeof(*oa));
 230         body->connid = conn->oc_id;
 231
 232         request->rq_replen = lustre_msg_size(1, &size);
 233
 234         rc = ptlrpc_queue_wait(request);
 235         rc = ptlrpc_check_status(request, rc);
 236         GOTO(out, rc);
 237
 238  out:
 239         ptlrpc_free_req(request);
 240         return 0;
 241 }
 242
 243 static int osc_create(struct obd_conn *conn, struct obdo *oa)
 244 {
 245         struct ptlrpc_request *request;
 246         struct ptlrpc_client *cl;
 247         struct ptlrpc_connection *connection;
 248         struct ost_body *body;
 249         int rc, size = sizeof(*body);
 250         ENTRY;
 251
 252         if (!oa) {
 253                 CERROR("oa NULL\n");
 254                 RETURN(-EINVAL);
 255         }
 256         osc_con2cl(conn, &cl, &connection);
 257         request = ptlrpc_prep_req(cl, connection, OST_CREATE, 1, &size, NULL);
 258         if (!request)
 259                 RETURN(-ENOMEM);
 260
 261         body = lustre_msg_buf(request->rq_reqmsg, 0);
 262         memcpy(&body->oa, oa, sizeof(*oa));
 263         body->oa.o_valid = ~0;
 264         body->connid = conn->oc_id;
 265
 266         request->rq_replen = lustre_msg_size(1, &size);
 267
 268         rc = ptlrpc_queue_wait(request);
 269         rc = ptlrpc_check_status(request, rc);
 270         if (rc)
 271                 GOTO(out, rc);
 272
 273         body = lustre_msg_buf(request->rq_repmsg, 0);
 274         memcpy(oa, &body->oa, sizeof(*oa));
 275
 276         EXIT;
 277  out:
 278         ptlrpc_free_req(request);
 279         return 0;
 280 }
 281
 282 static int osc_punch(struct obd_conn *conn, struct obdo *oa, obd_size count,
 283                      obd_off offset)
 284 {
 285         struct ptlrpc_request *request;
 286         struct ptlrpc_client *cl;
 287         struct ptlrpc_connection *connection;
 288         struct ost_body *body;
 289         int rc, size = sizeof(*body);
 290         ENTRY;
 291
 292         if (!oa) {
 293                 CERROR("oa NULL\n");
 294                 RETURN(-EINVAL);
 295         }
 296         osc_con2cl(conn, &cl, &connection);
 297         request = ptlrpc_prep_req(cl, connection, OST_PUNCH, 1, &size, NULL);
 298         if (!request)
 299                 RETURN(-ENOMEM);
 300
 301         body = lustre_msg_buf(request->rq_reqmsg, 0);
 302         memcpy(&body->oa, oa, sizeof(*oa));
 303         body->connid = conn->oc_id;
 304         body->oa.o_valid = ~0;
 305         body->oa.o_size = offset;
 306         body->oa.o_blocks = count;
 307
 308         request->rq_replen = lustre_msg_size(1, &size);
 309
 310         rc = ptlrpc_queue_wait(request);
 311         rc = ptlrpc_check_status(request, rc);
 312         if (rc)
 313                 GOTO(out, rc);
 314
 315         body = lustre_msg_buf(request->rq_repmsg, 0);
 316         memcpy(oa, &body->oa, sizeof(*oa));
 317
 318         EXIT;
 319  out:
 320         ptlrpc_free_req(request);
 321         return 0;
 322 }
 323
 324 static int osc_destroy(struct obd_conn *conn, struct obdo *oa)
 325 {
 326         struct ptlrpc_request *request;
 327         struct ptlrpc_client *cl;
 328         struct ptlrpc_connection *connection;
 329         struct ost_body *body;
 330         int rc, size = sizeof(*body);
 331         ENTRY;
 332
 333         if (!oa) {
 334                 CERROR("oa NULL\n");
 335                 RETURN(-EINVAL);
 336         }
 337         osc_con2cl(conn, &cl, &connection);
 338         request = ptlrpc_prep_req(cl, connection, OST_DESTROY, 1, &size, NULL);
 339         if (!request)
 340                 RETURN(-ENOMEM);
 341
 342         body = lustre_msg_buf(request->rq_reqmsg, 0);
 343         memcpy(&body->oa, oa, sizeof(*oa));
 344         body->connid = conn->oc_id;
 345         body->oa.o_valid = ~0;
 346
 347         request->rq_replen = lustre_msg_size(1, &size);
 348
 349         rc = ptlrpc_queue_wait(request);
 350         rc = ptlrpc_check_status(request, rc);
 351         if (rc)
 352                 GOTO(out, rc);
 353
 354         body = lustre_msg_buf(request->rq_repmsg, 0);
 355         memcpy(oa, &body->oa, sizeof(*oa));
 356
 357         EXIT;
 358  out:
 359         ptlrpc_free_req(request);
 360         return 0;
 361 }
 362
 363 static int osc_sendpage(struct ptlrpc_bulk_desc *desc,
 364                         struct niobuf_remote *dst, struct niobuf_local *src)
 365 {
 366         struct ptlrpc_bulk_page *page;
 367         ENTRY;
 368
 369         page = ptlrpc_prep_bulk_page(desc);
 370         if (page == NULL)
 371                 RETURN(-ENOMEM);
 372
 373         page->b_buf = (void *)(unsigned long)src->addr;
 374         page->b_buflen = src->len;
 375         page->b_xid = dst->xid;
 376
 377         RETURN(0);
 378 }
 379
 380 static int osc_brw_read(struct obd_conn *conn, obd_count num_oa,
 381                         struct obdo **oa, obd_count *oa_bufs, struct page **buf,
 382                         obd_size *count, obd_off *offset, obd_flag *flags)
 383 {
 384         struct ptlrpc_client *cl;
 385         struct ptlrpc_connection *connection;
 386         struct ptlrpc_request *request;
 387         struct ost_body *body;
 388         struct list_head *tmp;
 389         int pages, rc, i, j, size[3] = {sizeof(*body)};
 390         void *ptr1, *ptr2;
 391         struct ptlrpc_bulk_desc *desc;
 392         ENTRY;
 393
 394         size[1] = num_oa * sizeof(struct obd_ioobj);
 395         pages = 0;
 396         for (i = 0; i < num_oa; i++)
 397                 pages += oa_bufs[i];
 398         size[2] = pages * sizeof(struct niobuf_remote);
 399
 400         osc_con2cl(conn, &cl, &connection);
 401         request = ptlrpc_prep_req(cl, connection, OST_BRW, 3, size, NULL);
 402         if (!request)
 403                 GOTO(out, rc = -ENOMEM);
 404
 405         body = lustre_msg_buf(request->rq_reqmsg, 0);
 406         body->data = OBD_BRW_READ;
 407
 408         desc = ptlrpc_prep_bulk(connection);
 409         if (!desc)
 410                 GOTO(out2, rc = -ENOMEM);
 411         desc->b_portal = OST_BULK_PORTAL;
 412
 413         ptr1 = lustre_msg_buf(request->rq_reqmsg, 1);
 414         ptr2 = lustre_msg_buf(request->rq_reqmsg, 2);
 415         for (pages = 0, i = 0; i < num_oa; i++) {
 416                 ost_pack_ioo(&ptr1, oa[i], oa_bufs[i]);
 417                 for (j = 0; j < oa_bufs[i]; j++, pages++) {
 418                         struct ptlrpc_bulk_page *bulk;
 419                         bulk = ptlrpc_prep_bulk_page(desc);
 420                         if (bulk == NULL)
 421                                 GOTO(out3, rc = -ENOMEM);
 422
 423                         spin_lock(&connection->c_lock);
 424                         bulk->b_xid = ++connection->c_xid_out;
 425                         spin_unlock(&connection->c_lock);
 426
 427                         bulk->b_buf = kmap(buf[pages]);
 428                         bulk->b_page = buf[pages];
 429                         bulk->b_buflen = PAGE_SIZE;
 430                         ost_pack_niobuf(&ptr2, offset[pages], count[pages],
 431                                         flags[pages], bulk->b_xid);
 432                 }
 433         }
 434
 435         rc = ptlrpc_register_bulk(desc);
 436         if (rc)
 437                 GOTO(out3, rc);
 438
 439         request->rq_replen = lustre_msg_size(1, size);
 440         rc = ptlrpc_queue_wait(request);
 441         rc = ptlrpc_check_status(request, rc);
 442         if (rc)
 443                 ptlrpc_abort_bulk(desc);
 444         GOTO(out3, rc);
 445
 446  out3:
 447         list_for_each(tmp, &desc->b_page_list) {
 448                 struct ptlrpc_bulk_page *bulk;
 449                 bulk = list_entry(tmp, struct ptlrpc_bulk_page, b_link);
 450                 if (bulk->b_buf != NULL)
 451                         kunmap(bulk->b_page);
 452         }
 453         ptlrpc_free_bulk(desc);
 454  out2:
 455         ptlrpc_free_req(request);
 456  out:
 457         return rc;
 458 }
 459
 460 static int osc_brw_write(struct obd_conn *conn, obd_count num_oa,
 461                          struct obdo **oa, obd_count *oa_bufs,
 462                          struct page **pagearray, obd_size *count, obd_off *offset,
 463                          obd_flag *flags)
 464 {
 465         struct ptlrpc_client *cl;
 466         struct ptlrpc_connection *connection;
 467         struct ptlrpc_request *request;
 468         struct ptlrpc_bulk_desc *desc;
 469         struct obd_ioobj ioo;
 470         struct ost_body *body;
 471         struct niobuf_local *local;
 472         struct niobuf_remote *remote;
 473         long pages;
 474         int rc, i, j, size[3] = {sizeof(*body)};
 475         void *ptr1, *ptr2;
 476         ENTRY;
 477
 478         size[1] = num_oa * sizeof(ioo);
 479         pages = 0;
 480         for (i = 0; i < num_oa; i++)
 481                 pages += oa_bufs[i];
 482         size[2] = pages * sizeof(*remote);
 483
 484         OBD_ALLOC(local, pages * sizeof(*local));
 485         if (local == NULL)
 486                 RETURN(-ENOMEM);
 487
 488         osc_con2cl(conn, &cl, &connection);
 489         request = ptlrpc_prep_req(cl, connection, OST_BRW, 3, size, NULL);
 490         if (!request)
 491                 GOTO(out, rc = -ENOMEM);
 492         body = lustre_msg_buf(request->rq_reqmsg, 0);
 493         body->data = OBD_BRW_WRITE;
 494
 495         ptr1 = lustre_msg_buf(request->rq_reqmsg, 1);
 496         ptr2 = lustre_msg_buf(request->rq_reqmsg, 2);
 497         for (pages = 0, i = 0; i < num_oa; i++) {
 498                 ost_pack_ioo(&ptr1, oa[i], oa_bufs[i]);
 499                 for (j = 0; j < oa_bufs[i]; j++, pages++) {
 500                         local[pages].addr = kmap(pagearray[pages]);
 501                         local[pages].offset = offset[pages];
 502                         local[pages].len = count[pages];
 503                         ost_pack_niobuf(&ptr2, offset[pages], count[pages],
 504                                         flags[pages], 0);
 505                 }
 506         }
 507
 508         size[1] = pages * sizeof(struct niobuf_remote);
 509         request->rq_replen = lustre_msg_size(2, size);
 510
 511         rc = ptlrpc_queue_wait(request);
 512         rc = ptlrpc_check_status(request, rc);
 513         if (rc)
 514                 GOTO(out2, rc);
 515
 516         ptr2 = lustre_msg_buf(request->rq_repmsg, 1);
 517         if (ptr2 == NULL)
 518                 GOTO(out2, rc = -EINVAL);
 519
 520         if (request->rq_repmsg->buflens[1] !=
 521             pages * sizeof(struct niobuf_remote)) {
 522                 CERROR("buffer length wrong (%d vs. %ld)\n",
 523                        request->rq_repmsg->buflens[1],
 524                        pages * sizeof(struct niobuf_remote));
 525                 GOTO(out2, rc = -EINVAL);
 526         }
 527
 528         desc = ptlrpc_prep_bulk(connection);
 529         desc->b_portal = OSC_BULK_PORTAL;
 530
 531         for (pages = 0, i = 0; i < num_oa; i++) {
 532                 for (j = 0; j < oa_bufs[i]; j++, pages++) {
 533                         ost_unpack_niobuf(&ptr2, &remote);
 534                         rc = osc_sendpage(desc, remote, &local[pages]);
 535                         if (rc)
 536                                 GOTO(out3, rc);
 537                 }
 538         }
 539
 540         rc = ptlrpc_send_bulk(desc);
 541         GOTO(out3, rc);
 542
 543  out3:
 544         ptlrpc_free_bulk(desc);
 545  out2:
 546         ptlrpc_free_req(request);
 547         for (pages = 0, i = 0; i < num_oa; i++)
 548                 for (j = 0; j < oa_bufs[i]; j++, pages++)
 549                         kunmap(pagearray[pages]);
 550  out:
 551         OBD_FREE(local, pages * sizeof(*local));
 552
 553         return rc;
 554 }
 555
 556 static int osc_brw(int rw, struct obd_conn *conn, obd_count num_oa,
 557                    struct obdo **oa, obd_count *oa_bufs, struct page **buf,
 558                    obd_size *count, obd_off *offset, obd_flag *flags)
 559 {
 560         if (rw == OBD_BRW_READ)
 561                 return osc_brw_read(conn, num_oa, oa, oa_bufs, buf, count,
 562                                     offset, flags);
 563         else
 564                 return osc_brw_write(conn, num_oa, oa, oa_bufs, buf, count,
 565                                      offset, flags);
 566 }
 567
 568 static int osc_enqueue(struct obd_conn *oconn, struct ldlm_namespace *ns,
 569                        struct ldlm_handle *parent_lock, __u64 *res_id,
 570                        __u32 type, struct ldlm_extent *extent, __u32 mode,
 571                        int *flags, void *data, int datalen,
 572                        struct ldlm_handle *lockh)
 573 {
 574         struct ptlrpc_connection *conn;
 575         struct ptlrpc_client *cl;
 576         int rc;
 577         __u32 mode2;
 578
 579         /* Filesystem locks are given a bit of special treatment: first we
 580          * fixup the lock to start and end on page boundaries. */
 581         extent->start &= PAGE_MASK;
 582         extent->end = (extent->end + PAGE_SIZE - 1) & PAGE_MASK;
 583
 584         /* Next, search for already existing extent locks that will cover us */
 585         osc_con2dlmcl(oconn, &cl, &conn);
 586         rc = ldlm_local_lock_match(ns, res_id, type, extent, mode, lockh);
 587         if (rc == 1) {
 588                 /* We already have a lock, and it's referenced */
 589                 return 0;
 590         }
 591
 592         /* Next, search for locks that we can upgrade (if we're trying to write)
 593          * or are more than we need (if we're trying to read).  Because the VFS
 594          * and page cache already protect us locally, lots of readers/writers
 595          * can share a single PW lock. */
 596         if (mode == LCK_PW)
 597                 mode2 = LCK_PR;
 598         else
 599                 mode2 = LCK_PW;
 600
 601         rc = ldlm_local_lock_match(ns, res_id, type, extent, mode2, lockh);
 602         if (rc == 1) {
 603                 int flags;
 604                 struct ldlm_lock *lock = ldlm_handle2object(lockh);
 605                 /* FIXME: This is not incredibly elegant, but it might
 606                  * be more elegant than adding another parameter to
 607                  * lock_match.  I want a second opinion. */
 608                 ldlm_lock_addref(lock, mode);
 609                 ldlm_lock_decref(lock, mode2);
 610
 611                 if (mode == LCK_PR)
 612                         return 0;
 613
 614                 rc = ldlm_cli_convert(cl, lockh, type, &flags);
 615                 if (rc)
 616                         LBUG();
 617
 618                 return rc;
 619         }
 620
 621         rc = ldlm_cli_enqueue(cl, conn, ns, parent_lock, res_id, type,
 622                               extent, mode, flags, data, datalen, lockh);
 623         return rc;
 624 }
 625
 626 static int osc_cancel(struct obd_conn *oconn, __u32 mode,
 627                       struct ldlm_handle *lockh)
 628 {
 629         struct ldlm_lock *lock;
 630         ENTRY;
 631
 632         lock = ldlm_handle2object(lockh);
 633         ldlm_lock_decref(lock, mode);
 634
 635         RETURN(0);
 636 }
 637
 638 static int osc_setup(struct obd_device *obddev, obd_count len, void *buf)
 639 {
 640         struct osc_obd *osc = &obddev->u.osc;
 641         int rc;
 642         ENTRY;
 643
 644         osc->osc_conn = ptlrpc_uuid_to_connection("ost");
 645         if (!osc->osc_conn)
 646                 RETURN(-EINVAL);
 647
 648         OBD_ALLOC(osc->osc_client, sizeof(*osc->osc_client));
 649         if (osc->osc_client == NULL)
 650                 GOTO(out_conn, rc = -ENOMEM);
 651
 652         OBD_ALLOC(osc->osc_ldlm_client, sizeof(*osc->osc_ldlm_client));
 653         if (osc->osc_ldlm_client == NULL)
 654                 GOTO(out_client, rc = -ENOMEM);
 655
 656         ptlrpc_init_client(NULL, NULL, OST_REQUEST_PORTAL, OSC_REPLY_PORTAL,
 657                            osc->osc_client);
 658         ptlrpc_init_client(NULL, NULL, LDLM_REQUEST_PORTAL, LDLM_REPLY_PORTAL,
 659                            osc->osc_ldlm_client);
 660         osc->osc_client->cli_name = "osc";
 661         osc->osc_ldlm_client->cli_name = "ldlm";
 662
 663         MOD_INC_USE_COUNT;
 664         RETURN(0);
 665
 666  out_client:
 667         OBD_FREE(osc->osc_client, sizeof(*osc->osc_client));
 668  out_conn:
 669         ptlrpc_put_connection(osc->osc_conn);
 670         return rc;
 671 }
 672
 673 static int osc_cleanup(struct obd_device * obddev)
 674 {
 675         struct osc_obd *osc = &obddev->u.osc;
 676
 677         ptlrpc_cleanup_client(osc->osc_client);
 678         OBD_FREE(osc->osc_client, sizeof(*osc->osc_client));
 679         ptlrpc_cleanup_client(osc->osc_ldlm_client);
 680         OBD_FREE(osc->osc_ldlm_client, sizeof(*osc->osc_ldlm_client));
 681         ptlrpc_put_connection(osc->osc_conn);
 682
 683         MOD_DEC_USE_COUNT;
 684         return 0;
 685 }
 686
 687 struct obd_ops osc_obd_ops = {
 688         o_setup:   osc_setup,
 689         o_cleanup: osc_cleanup,
 690         o_create: osc_create,
 691         o_destroy: osc_destroy,
 692         o_getattr: osc_getattr,
 693         o_setattr: osc_setattr,
 694         o_open: osc_open,
 695         o_close: osc_close,
 696         o_connect: osc_connect,
 697         o_disconnect: osc_disconnect,
 698         o_brw: osc_brw,
 699         o_punch: osc_punch,
 700         o_enqueue: osc_enqueue,
 701         o_cancel: osc_cancel
 702 };
 703
 704 static int __init osc_init(void)
 705 {
 706         obd_register_type(&osc_obd_ops, LUSTRE_OSC_NAME);
 707         return 0;
 708 }
 709
 710 static void __exit osc_exit(void)
 711 {
 712         obd_unregister_type(LUSTRE_OSC_NAME);
 713 }
 714
 715 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
 716 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC) v1.0");
 717 MODULE_LICENSE("GPL");
 718
 719 module_init(osc_init);
 720 module_exit(osc_exit);