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 #include <linux/lustre_debug.h>
  26
  27 static void osc_con2cl(struct obd_conn *conn, struct ptlrpc_client **cl,
  28                        struct ptlrpc_connection **connection)
  29 {
  30         struct osc_obd *osc = &conn->oc_dev->u.osc;
  31         *cl = osc->osc_client;
  32         *connection = osc->osc_conn;
  33 }
  34
  35 static void osc_con2dlmcl(struct obd_conn *conn, struct ptlrpc_client **cl,
  36                           struct ptlrpc_connection **connection)
  37 {
  38         struct osc_obd *osc = &conn->oc_dev->u.osc;
  39         *cl = osc->osc_ldlm_client;
  40         *connection = osc->osc_conn;
  41 }
  42
  43 static int osc_connect(struct obd_conn *conn)
  44 {
  45         struct ptlrpc_request *request;
  46         struct ptlrpc_client *cl;
  47         struct ptlrpc_connection *connection;
  48         struct ost_body *body;
  49         int rc, size = sizeof(*body);
  50         ENTRY;
  51
  52         osc_con2cl(conn, &cl, &connection);
  53         request = ptlrpc_prep_req(cl, connection, OST_CONNECT, 0, NULL, NULL);
  54         if (!request)
  55                 RETURN(-ENOMEM);
  56
  57         request->rq_replen = lustre_msg_size(1, &size);
  58
  59         rc = ptlrpc_queue_wait(request);
  60         rc = ptlrpc_check_status(request, rc);
  61         if (rc) {
  62                 CERROR("%s failed: rc = %d\n", __FUNCTION__, rc);
  63                 GOTO(out, rc);
  64         }
  65
  66         body = lustre_msg_buf(request->rq_repmsg, 0);
  67         CDEBUG(D_INODE, "received connid %d\n", body->connid);
  68
  69         conn->oc_id = body->connid;
  70         EXIT;
  71  out:
  72         ptlrpc_free_req(request);
  73         return rc;
  74 }
  75
  76 static int osc_disconnect(struct obd_conn *conn)
  77 {
  78         struct ptlrpc_request *request;
  79         struct ptlrpc_client *cl;
  80         struct ptlrpc_connection *connection;
  81         struct ost_body *body;
  82         int rc, size = sizeof(*body);
  83         ENTRY;
  84
  85         osc_con2cl(conn, &cl, &connection);
  86         request = ptlrpc_prep_req(cl, connection, OST_DISCONNECT, 1, &size, NULL);
  87         if (!request)
  88                 RETURN(-ENOMEM);
  89
  90         body = lustre_msg_buf(request->rq_reqmsg, 0);
  91         body->connid = conn->oc_id;
  92
  93         request->rq_replen = lustre_msg_size(1, &size);
  94
  95         rc = ptlrpc_queue_wait(request);
  96         GOTO(out, rc);
  97  out:
  98         ptlrpc_free_req(request);
  99         return rc;
 100 }
 101
 102 static int osc_getattr(struct obd_conn *conn, struct obdo *oa)
 103 {
 104         struct ptlrpc_request *request;
 105         struct ptlrpc_client *cl;
 106         struct ptlrpc_connection *connection;
 107         struct ost_body *body;
 108         int rc, size = sizeof(*body);
 109         ENTRY;
 110
 111         osc_con2cl(conn, &cl, &connection);
 112         request = ptlrpc_prep_req(cl, connection, OST_GETATTR, 1, &size, NULL);
 113         if (!request)
 114                 RETURN(-ENOMEM);
 115
 116         body = lustre_msg_buf(request->rq_reqmsg, 0);
 117         memcpy(&body->oa, oa, sizeof(*oa));
 118         body->connid = conn->oc_id;
 119         body->oa.o_valid = ~0;
 120
 121         request->rq_replen = lustre_msg_size(1, &size);
 122
 123         rc = ptlrpc_queue_wait(request);
 124         rc = ptlrpc_check_status(request, rc);
 125         if (rc) {
 126                 CERROR("%s failed: rc = %d\n", __FUNCTION__, rc);
 127                 GOTO(out, rc);
 128         }
 129
 130         body = lustre_msg_buf(request->rq_repmsg, 0);
 131         CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
 132         if (oa)
 133                 memcpy(oa, &body->oa, sizeof(*oa));
 134
 135         EXIT;
 136  out:
 137         ptlrpc_free_req(request);
 138         return 0;
 139 }
 140
 141 static int osc_open(struct obd_conn *conn, struct obdo *oa)
 142 {
 143         struct ptlrpc_request *request;
 144         struct ptlrpc_client *cl;
 145         struct ptlrpc_connection *connection;
 146         struct ost_body *body;
 147         int rc, size = sizeof(*body);
 148         ENTRY;
 149
 150         osc_con2cl(conn, &cl, &connection);
 151         request = ptlrpc_prep_req(cl, connection, OST_OPEN, 1, &size, NULL);
 152         if (!request)
 153                 RETURN(-ENOMEM);
 154
 155         body = lustre_msg_buf(request->rq_reqmsg, 0);
 156         memcpy(&body->oa, oa, sizeof(*oa));
 157         body->connid = conn->oc_id;
 158         if (body->oa.o_valid != (OBD_MD_FLMODE | OBD_MD_FLID))
 159                 LBUG();
 160
 161         request->rq_replen = lustre_msg_size(1, &size);
 162
 163         rc = ptlrpc_queue_wait(request);
 164         rc = ptlrpc_check_status(request, rc);
 165         if (rc)
 166                 GOTO(out, rc);
 167
 168         body = lustre_msg_buf(request->rq_repmsg, 0);
 169         CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
 170         if (oa)
 171                 memcpy(oa, &body->oa, sizeof(*oa));
 172
 173         EXIT;
 174  out:
 175         ptlrpc_free_req(request);
 176         return 0;
 177 }
 178
 179 static int osc_close(struct obd_conn *conn, struct obdo *oa)
 180 {
 181         struct ptlrpc_request *request;
 182         struct ptlrpc_client *cl;
 183         struct ptlrpc_connection *connection;
 184         struct ost_body *body;
 185         int rc, size = sizeof(*body);
 186         ENTRY;
 187
 188         osc_con2cl(conn, &cl, &connection);
 189         request = ptlrpc_prep_req(cl, connection, OST_CLOSE, 1, &size, NULL);
 190         if (!request)
 191                 RETURN(-ENOMEM);
 192
 193         body = lustre_msg_buf(request->rq_reqmsg, 0);
 194         memcpy(&body->oa, oa, sizeof(*oa));
 195         body->connid = conn->oc_id;
 196
 197         request->rq_replen = lustre_msg_size(1, &size);
 198
 199         rc = ptlrpc_queue_wait(request);
 200         rc = ptlrpc_check_status(request, rc);
 201         if (rc)
 202                 GOTO(out, rc);
 203
 204         body = lustre_msg_buf(request->rq_repmsg, 0);
 205         CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
 206         if (oa)
 207                 memcpy(oa, &body->oa, sizeof(*oa));
 208
 209         EXIT;
 210  out:
 211         ptlrpc_free_req(request);
 212         return 0;
 213 }
 214
 215 static int osc_setattr(struct obd_conn *conn, struct obdo *oa)
 216 {
 217         struct ptlrpc_request *request;
 218         struct ptlrpc_client *cl;
 219         struct ptlrpc_connection *connection;
 220         struct ost_body *body;
 221         int rc, size = sizeof(*body);
 222         ENTRY;
 223
 224         osc_con2cl(conn, &cl, &connection);
 225         request = ptlrpc_prep_req(cl, connection, OST_SETATTR, 1, &size, NULL);
 226         if (!request)
 227                 RETURN(-ENOMEM);
 228
 229         body = lustre_msg_buf(request->rq_reqmsg, 0);
 230         memcpy(&body->oa, oa, sizeof(*oa));
 231         body->connid = conn->oc_id;
 232
 233         request->rq_replen = lustre_msg_size(1, &size);
 234
 235         rc = ptlrpc_queue_wait(request);
 236         rc = ptlrpc_check_status(request, rc);
 237         GOTO(out, rc);
 238
 239  out:
 240         ptlrpc_free_req(request);
 241         return 0;
 242 }
 243
 244 static int osc_create(struct obd_conn *conn, struct obdo *oa)
 245 {
 246         struct ptlrpc_request *request;
 247         struct ptlrpc_client *cl;
 248         struct ptlrpc_connection *connection;
 249         struct ost_body *body;
 250         int rc, size = sizeof(*body);
 251         ENTRY;
 252
 253         if (!oa) {
 254                 CERROR("oa NULL\n");
 255                 RETURN(-EINVAL);
 256         }
 257         osc_con2cl(conn, &cl, &connection);
 258         request = ptlrpc_prep_req(cl, connection, OST_CREATE, 1, &size, NULL);
 259         if (!request)
 260                 RETURN(-ENOMEM);
 261
 262         body = lustre_msg_buf(request->rq_reqmsg, 0);
 263         memcpy(&body->oa, oa, sizeof(*oa));
 264         body->oa.o_valid = ~0;
 265         body->connid = conn->oc_id;
 266
 267         request->rq_replen = lustre_msg_size(1, &size);
 268
 269         rc = ptlrpc_queue_wait(request);
 270         rc = ptlrpc_check_status(request, rc);
 271         if (rc)
 272                 GOTO(out, rc);
 273
 274         body = lustre_msg_buf(request->rq_repmsg, 0);
 275         memcpy(oa, &body->oa, sizeof(*oa));
 276
 277         EXIT;
 278  out:
 279         ptlrpc_free_req(request);
 280         return 0;
 281 }
 282
 283 static int osc_punch(struct obd_conn *conn, struct obdo *oa, obd_size count,
 284                      obd_off offset)
 285 {
 286         struct ptlrpc_request *request;
 287         struct ptlrpc_client *cl;
 288         struct ptlrpc_connection *connection;
 289         struct ost_body *body;
 290         int rc, size = sizeof(*body);
 291         ENTRY;
 292
 293         if (!oa) {
 294                 CERROR("oa NULL\n");
 295                 RETURN(-EINVAL);
 296         }
 297         osc_con2cl(conn, &cl, &connection);
 298         request = ptlrpc_prep_req(cl, connection, OST_PUNCH, 1, &size, NULL);
 299         if (!request)
 300                 RETURN(-ENOMEM);
 301
 302         body = lustre_msg_buf(request->rq_reqmsg, 0);
 303         memcpy(&body->oa, oa, sizeof(*oa));
 304         body->connid = conn->oc_id;
 305         body->oa.o_valid = ~0;
 306         body->oa.o_size = offset;
 307         body->oa.o_blocks = count;
 308
 309         request->rq_replen = lustre_msg_size(1, &size);
 310
 311         rc = ptlrpc_queue_wait(request);
 312         rc = ptlrpc_check_status(request, rc);
 313         if (rc)
 314                 GOTO(out, rc);
 315
 316         body = lustre_msg_buf(request->rq_repmsg, 0);
 317         memcpy(oa, &body->oa, sizeof(*oa));
 318
 319         EXIT;
 320  out:
 321         ptlrpc_free_req(request);
 322         return 0;
 323 }
 324
 325 static int osc_destroy(struct obd_conn *conn, struct obdo *oa)
 326 {
 327         struct ptlrpc_request *request;
 328         struct ptlrpc_client *cl;
 329         struct ptlrpc_connection *connection;
 330         struct ost_body *body;
 331         int rc, size = sizeof(*body);
 332         ENTRY;
 333
 334         if (!oa) {
 335                 CERROR("oa NULL\n");
 336                 RETURN(-EINVAL);
 337         }
 338         osc_con2cl(conn, &cl, &connection);
 339         request = ptlrpc_prep_req(cl, connection, OST_DESTROY, 1, &size, NULL);
 340         if (!request)
 341                 RETURN(-ENOMEM);
 342
 343         body = lustre_msg_buf(request->rq_reqmsg, 0);
 344         memcpy(&body->oa, oa, sizeof(*oa));
 345         body->connid = conn->oc_id;
 346         body->oa.o_valid = ~0;
 347
 348         request->rq_replen = lustre_msg_size(1, &size);
 349
 350         rc = ptlrpc_queue_wait(request);
 351         rc = ptlrpc_check_status(request, rc);
 352         if (rc)
 353                 GOTO(out, rc);
 354
 355         body = lustre_msg_buf(request->rq_repmsg, 0);
 356         memcpy(oa, &body->oa, sizeof(*oa));
 357
 358         EXIT;
 359  out:
 360         ptlrpc_free_req(request);
 361         return 0;
 362 }
 363
 364 static int osc_sendpage(struct ptlrpc_bulk_desc *desc,
 365                         struct niobuf_remote *dst, struct niobuf_local *src)
 366 {
 367         struct ptlrpc_bulk_page *page;
 368         ENTRY;
 369
 370         ASSERT_FILE_OFFSET(NTOH__u64(src->offset),
 371                            RETURN(dump_rniobuf(dst) | dump_lniobuf(src)));
 372         page = ptlrpc_prep_bulk_page(desc);
 373         if (page == NULL)
 374                 RETURN(-ENOMEM);
 375
 376         page->b_buf = (void *)(unsigned long)src->addr;
 377         page->b_buflen = src->len;
 378         page->b_xid = dst->xid;
 379
 380         RETURN(0);
 381 }
 382
 383 static int osc_brw_read(struct obd_conn *conn, obd_count num_oa,
 384                         struct obdo **oa, obd_count *oa_bufs, struct page **buf,
 385                         obd_size *count, obd_off *offset, obd_flag *flags)
 386 {
 387         struct ptlrpc_client *cl;
 388         struct ptlrpc_connection *connection;
 389         struct ptlrpc_request *request;
 390         struct ost_body *body;
 391         struct list_head *tmp, *next;
 392         int pages, rc, i, j, size[3] = {sizeof(*body)};
 393         void *ptr1, *ptr2;
 394         struct ptlrpc_bulk_desc *desc;;
 395         ENTRY;
 396
 397         size[1] = num_oa * sizeof(struct obd_ioobj);
 398         pages = 0;
 399         for (i = 0; i < num_oa; i++)
 400                 pages += oa_bufs[i];
 401         size[2] = pages * sizeof(struct niobuf_remote);
 402
 403         osc_con2cl(conn, &cl, &connection);
 404         request = ptlrpc_prep_req(cl, connection, OST_BRW, 3, size, NULL);
 405         if (!request)
 406                 GOTO(out3, rc = -ENOMEM);
 407
 408         body = lustre_msg_buf(request->rq_reqmsg, 0);
 409         body->data = OBD_BRW_READ;
 410
 411         desc = ptlrpc_prep_bulk(connection);
 412         if (desc == NULL)
 413                 GOTO(out2, rc = -ENOMEM);
 414         desc->b_portal = OST_BULK_PORTAL;
 415
 416         ptr1 = lustre_msg_buf(request->rq_reqmsg, 1);
 417         ptr2 = lustre_msg_buf(request->rq_reqmsg, 2);
 418         for (pages = 0, i = 0; i < num_oa; i++) {
 419                 ost_pack_ioo(&ptr1, oa[i], oa_bufs[i]);
 420                 for (j = 0; j < oa_bufs[i]; j++, pages++) {
 421                         struct ptlrpc_bulk_page *page;
 422                         page = ptlrpc_prep_bulk_page(desc);
 423                         if (page == NULL)
 424                                 GOTO(out, rc = -ENOMEM);
 425
 426                         spin_lock(&connection->c_lock);
 427                         page->b_xid = ++connection->c_xid_out;
 428                         spin_unlock(&connection->c_lock);
 429
 430                         page->b_buf = kmap(buf[pages]);
 431                         page->b_buflen = PAGE_SIZE;
 432                         ost_pack_niobuf(&ptr2, offset[pages], count[pages],
 433                                         flags[pages], page->b_xid);
 434                 }
 435         }
 436
 437         rc = ptlrpc_register_bulk(desc);
 438         if (rc)
 439                 GOTO(out, rc);
 440
 441         request->rq_replen = lustre_msg_size(1, size);
 442         rc = ptlrpc_queue_wait(request);
 443         rc = ptlrpc_check_status(request, rc);
 444         if (rc)
 445                 ptlrpc_abort_bulk(desc);
 446         GOTO(out, rc);
 447
 448  out:
 449         list_for_each_safe(tmp, next, &desc->b_page_list) {
 450                 struct ptlrpc_bulk_page *page;
 451                 page = list_entry(tmp, struct ptlrpc_bulk_page, b_link);
 452
 453                 if (page->b_buf != NULL)
 454                         kunmap(page->b_buf);
 455         }
 456
 457         ptlrpc_free_bulk(desc);
 458  out2:
 459         ptlrpc_free_req(request);
 460  out3:
 461         return rc;
 462 }
 463
 464 static int osc_brw_write(struct obd_conn *conn, obd_count num_oa,
 465                          struct obdo **oa, obd_count *oa_bufs,
 466                          struct page **buf, obd_size *count, obd_off *offset,
 467                          obd_flag *flags)
 468 {
 469         struct ptlrpc_client *cl;
 470         struct ptlrpc_connection *connection;
 471         struct ptlrpc_request *request;
 472         struct ptlrpc_bulk_desc *desc;
 473         struct obd_ioobj ioo;
 474         struct ost_body *body;
 475         struct niobuf_local *local;
 476         struct niobuf_remote *remote;
 477         long pages;
 478         int rc, i, j, size[3] = {sizeof(*body)};
 479         void *ptr1, *ptr2;
 480         ENTRY;
 481
 482         size[1] = num_oa * sizeof(ioo);
 483         pages = 0;
 484         for (i = 0; i < num_oa; i++)
 485                 pages += oa_bufs[i];
 486         size[2] = pages * sizeof(*remote);
 487
 488         OBD_ALLOC(local, pages * sizeof(*local));
 489         if (local == NULL)
 490                 RETURN(-ENOMEM);
 491
 492         osc_con2cl(conn, &cl, &connection);
 493         request = ptlrpc_prep_req(cl, connection, OST_BRW, 3, size, NULL);
 494         if (!request)
 495                 GOTO(out, rc = -ENOMEM);
 496         body = lustre_msg_buf(request->rq_reqmsg, 0);
 497         body->data = OBD_BRW_WRITE;
 498
 499         ptr1 = lustre_msg_buf(request->rq_reqmsg, 1);
 500         ptr2 = lustre_msg_buf(request->rq_reqmsg, 2);
 501         for (pages = 0, i = 0; i < num_oa; i++) {
 502                 ost_pack_ioo(&ptr1, oa[i], oa_bufs[i]);
 503                 for (j = 0; j < oa_bufs[i]; j++, pages++) {
 504                         local[pages].addr = (__u64)(long)kmap(buf[pages]);
 505                         local[pages].offset = offset[pages];
 506                         local[pages].len = count[pages];
 507                         ost_pack_niobuf(&ptr2, offset[pages], count[pages],
 508                                         flags[pages], 0);
 509                 }
 510         }
 511
 512         size[1] = pages * sizeof(struct niobuf_remote);
 513         request->rq_replen = lustre_msg_size(2, size);
 514
 515         rc = ptlrpc_queue_wait(request);
 516         rc = ptlrpc_check_status(request, rc);
 517         if (rc)
 518                 GOTO(out2, rc);
 519
 520         ptr2 = lustre_msg_buf(request->rq_repmsg, 1);
 521         if (ptr2 == NULL)
 522                 GOTO(out2, rc = -EINVAL);
 523
 524         if (request->rq_repmsg->buflens[1] !=
 525             pages * sizeof(struct niobuf_remote)) {
 526                 CERROR("buffer length wrong (%d vs. %ld)\n",
 527                        request->rq_repmsg->buflens[1],
 528                        pages * sizeof(struct niobuf_remote));
 529                 GOTO(out2, rc = -EINVAL);
 530         }
 531
 532         desc = ptlrpc_prep_bulk(connection);
 533         desc->b_portal = OSC_BULK_PORTAL;
 534
 535         for (pages = 0, i = 0; i < num_oa; i++) {
 536                 for (j = 0; j < oa_bufs[i]; j++, pages++) {
 537                         ost_unpack_niobuf(&ptr2, &remote);
 538                         rc = osc_sendpage(desc, remote, &local[pages]);
 539                         if (rc)
 540                                 GOTO(out3, rc);
 541                 }
 542         }
 543
 544         rc = ptlrpc_send_bulk(desc);
 545         GOTO(out3, rc);
 546
 547  out3:
 548         ptlrpc_free_bulk(desc);
 549  out2:
 550         ptlrpc_free_req(request);
 551         for (pages = 0, i = 0; i < num_oa; i++)
 552                 for (j = 0; j < oa_bufs[i]; j++, pages++)
 553                         kunmap(buf[pages]);
 554  out:
 555         OBD_FREE(local, pages * sizeof(*local));
 556
 557         return rc;
 558 }
 559
 560 static int osc_brw(int rw, struct obd_conn *conn, obd_count num_oa,
 561                    struct obdo **oa, obd_count *oa_bufs, struct page **buf,
 562                    obd_size *count, obd_off *offset, obd_flag *flags)
 563 {
 564         if (rw == OBD_BRW_READ)
 565                 return osc_brw_read(conn, num_oa, oa, oa_bufs, buf, count,
 566                                     offset, flags);
 567         else
 568                 return osc_brw_write(conn, num_oa, oa, oa_bufs, buf, count,
 569                                      offset, flags);
 570 }
 571
 572 static int osc_enqueue(struct obd_conn *oconn, struct ldlm_namespace *ns,
 573                        struct ldlm_handle *parent_lock, __u64 *res_id,
 574                        __u32 type, struct ldlm_extent *extent, __u32 mode,
 575                        int *flags, void *data, int datalen,
 576                        struct ldlm_handle *lockh)
 577 {
 578         struct ptlrpc_connection *conn;
 579         struct ptlrpc_client *cl;
 580         int rc;
 581         __u32 mode2;
 582
 583         /* Filesystem locks are given a bit of special treatment: first we
 584          * fixup the lock to start and end on page boundaries. */
 585         extent->start &= PAGE_MASK;
 586         extent->end = (extent->end + PAGE_SIZE - 1) & PAGE_MASK;
 587
 588         /* Next, search for already existing extent locks that will cover us */
 589         osc_con2dlmcl(oconn, &cl, &conn);
 590         rc = ldlm_local_lock_match(ns, res_id, type, extent, mode, lockh);
 591         if (rc == 1) {
 592                 /* We already have a lock, and it's referenced */
 593                 return 0;
 594         }
 595
 596         /* Next, search for locks that we can upgrade (if we're trying to write)
 597          * or are more than we need (if we're trying to read).  Because the VFS
 598          * and page cache already protect us locally, lots of readers/writers
 599          * can share a single PW lock. */
 600         if (mode == LCK_PW)
 601                 mode2 = LCK_PR;
 602         else
 603                 mode2 = LCK_PW;
 604
 605         rc = ldlm_local_lock_match(ns, res_id, type, extent, mode2, lockh);
 606         if (rc == 1) {
 607                 int flags;
 608                 struct ldlm_lock *lock = ldlm_handle2object(lockh);
 609                 /* FIXME: This is not incredibly elegant, but it might
 610                  * be more elegant than adding another parameter to
 611                  * lock_match.  I want a second opinion. */
 612                 ldlm_lock_addref(lock, mode);
 613                 ldlm_lock_decref(lock, mode2);
 614
 615                 if (mode == LCK_PR)
 616                         return 0;
 617
 618                 rc = ldlm_cli_convert(cl, lockh, type, &flags);
 619                 if (rc)
 620                         LBUG();
 621
 622                 return rc;
 623         }
 624
 625         rc = ldlm_cli_enqueue(cl, conn, ns, parent_lock, res_id, type,
 626                               extent, mode, flags, data, datalen, lockh);
 627         return rc;
 628 }
 629
 630 static int osc_cancel(struct obd_conn *oconn, __u32 mode,
 631                       struct ldlm_handle *lockh)
 632 {
 633         struct ldlm_lock *lock;
 634         ENTRY;
 635
 636         lock = ldlm_handle2object(lockh);
 637         ldlm_lock_decref(lock, mode);
 638
 639         RETURN(0);
 640 }
 641
 642 static int osc_setup(struct obd_device *obddev, obd_count len, void *buf)
 643 {
 644         struct osc_obd *osc = &obddev->u.osc;
 645         int rc;
 646         ENTRY;
 647
 648         osc->osc_conn = ptlrpc_uuid_to_connection("ost");
 649         if (!osc->osc_conn)
 650                 RETURN(-EINVAL);
 651
 652         OBD_ALLOC(osc->osc_client, sizeof(*osc->osc_client));
 653         if (osc->osc_client == NULL)
 654                 GOTO(out_conn, rc = -ENOMEM);
 655
 656         OBD_ALLOC(osc->osc_ldlm_client, sizeof(*osc->osc_ldlm_client));
 657         if (osc->osc_ldlm_client == NULL)
 658                 GOTO(out_client, rc = -ENOMEM);
 659
 660         ptlrpc_init_client(NULL, NULL, OST_REQUEST_PORTAL, OSC_REPLY_PORTAL,
 661                            osc->osc_client);
 662         ptlrpc_init_client(NULL, NULL, LDLM_REQUEST_PORTAL, LDLM_REPLY_PORTAL,
 663                            osc->osc_ldlm_client);
 664         osc->osc_client->cli_name = "osc";
 665         osc->osc_ldlm_client->cli_name = "ldlm";
 666
 667         MOD_INC_USE_COUNT;
 668         RETURN(0);
 669
 670  out_client:
 671         OBD_FREE(osc->osc_client, sizeof(*osc->osc_client));
 672  out_conn:
 673         ptlrpc_put_connection(osc->osc_conn);
 674         return rc;
 675 }
 676
 677 static int osc_cleanup(struct obd_device * obddev)
 678 {
 679         struct osc_obd *osc = &obddev->u.osc;
 680
 681         ptlrpc_cleanup_client(osc->osc_client);
 682         OBD_FREE(osc->osc_client, sizeof(*osc->osc_client));
 683         ptlrpc_cleanup_client(osc->osc_ldlm_client);
 684         OBD_FREE(osc->osc_ldlm_client, sizeof(*osc->osc_ldlm_client));
 685         ptlrpc_put_connection(osc->osc_conn);
 686
 687         MOD_DEC_USE_COUNT;
 688         return 0;
 689 }
 690
 691 struct obd_ops osc_obd_ops = {
 692         o_setup:   osc_setup,
 693         o_cleanup: osc_cleanup,
 694         o_create: osc_create,
 695         o_destroy: osc_destroy,
 696         o_getattr: osc_getattr,
 697         o_setattr: osc_setattr,
 698         o_open: osc_open,
 699         o_close: osc_close,
 700         o_connect: osc_connect,
 701         o_disconnect: osc_disconnect,
 702         o_brw: osc_brw,
 703         o_punch: osc_punch,
 704         o_enqueue: osc_enqueue,
 705         o_cancel: osc_cancel
 706 };
 707
 708 static int __init osc_init(void)
 709 {
 710         obd_register_type(&osc_obd_ops, LUSTRE_OSC_NAME);
 711         return 0;
 712 }
 713
 714 static void __exit osc_exit(void)
 715 {
 716         obd_unregister_type(LUSTRE_OSC_NAME);
 717 }
 718
 719 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
 720 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC) v1.0");
 721 MODULE_LICENSE("GPL");
 722
 723 module_init(osc_init);
 724 module_exit(osc_exit);