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
  35 #include <linux/version.h>
  36 #include <linux/module.h>
  37 #include <linux/fs.h>
  38 #include <linux/stat.h>
  39 #include <linux/locks.h>
  40 #include <linux/ext2_fs.h>
  41 #include <linux/quotaops.h>
  42 #include <asm/unistd.h>
  43
  44 #define DEBUG_SUBSYSTEM S_OST
  45
  46 #include <linux/obd_ost.h>
  47 #include <linux/lustre_net.h>
  48
  49 static int ost_destroy(struct ost_obd *ost, struct ptlrpc_request *req)
  50 {
  51         struct obd_conn conn;
  52         int rc;
  53
  54         ENTRY;
  55
  56         conn.oc_id = req->rq_req.ost->connid;
  57         conn.oc_dev = ost->ost_tgt;
  58
  59         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
  60                           &req->rq_replen, &req->rq_repbuf);
  61         if (rc) {
  62                 CERROR("cannot pack reply\n");
  63                 return rc;
  64         }
  65
  66         req->rq_rep.ost->result = obd_destroy(&conn, &req->rq_req.ost->oa);
  67
  68         EXIT;
  69         return 0;
  70 }
  71
  72 static int ost_getattr(struct ost_obd *ost, struct ptlrpc_request *req)
  73 {
  74         struct obd_conn conn;
  75         int rc;
  76
  77         ENTRY;
  78
  79         conn.oc_id = req->rq_req.ost->connid;
  80         conn.oc_dev = ost->ost_tgt;
  81
  82         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
  83                           &req->rq_replen, &req->rq_repbuf);
  84         if (rc) {
  85                 CERROR("cannot pack reply\n");
  86                 return rc;
  87         }
  88         req->rq_rep.ost->oa.o_id = req->rq_req.ost->oa.o_id;
  89         req->rq_rep.ost->oa.o_valid = req->rq_req.ost->oa.o_valid;
  90
  91         req->rq_rep.ost->result =  obd_getattr(&conn, &req->rq_rep.ost->oa);
  92
  93         EXIT;
  94         return 0;
  95 }
  96
  97 static int ost_open(struct ost_obd *ost, struct ptlrpc_request *req)
  98 {
  99         struct obd_conn conn;
 100         int rc;
 101
 102         ENTRY;
 103
 104         conn.oc_id = req->rq_req.ost->connid;
 105         conn.oc_dev = ost->ost_tgt;
 106
 107         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 108                           &req->rq_replen, &req->rq_repbuf);
 109         if (rc) {
 110                 CERROR("cannot pack reply\n");
 111                 return rc;
 112         }
 113         req->rq_rep.ost->oa.o_id = req->rq_req.ost->oa.o_id;
 114         req->rq_rep.ost->oa.o_valid = req->rq_req.ost->oa.o_valid;
 115
 116         req->rq_rep.ost->result =  obd_open(&conn, &req->rq_rep.ost->oa);
 117
 118         EXIT;
 119         return 0;
 120 }
 121
 122 static int ost_close(struct ost_obd *ost, struct ptlrpc_request *req)
 123 {
 124         struct obd_conn conn;
 125         int rc;
 126
 127         ENTRY;
 128
 129         conn.oc_id = req->rq_req.ost->connid;
 130         conn.oc_dev = ost->ost_tgt;
 131
 132         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 133                           &req->rq_replen, &req->rq_repbuf);
 134         if (rc) {
 135                 CERROR("cannot pack reply\n");
 136                 return rc;
 137         }
 138         req->rq_rep.ost->oa.o_id = req->rq_req.ost->oa.o_id;
 139         req->rq_rep.ost->oa.o_valid = req->rq_req.ost->oa.o_valid;
 140
 141         req->rq_rep.ost->result =  obd_close(&conn, &req->rq_rep.ost->oa);
 142
 143         EXIT;
 144         return 0;
 145 }
 146
 147
 148 static int ost_create(struct ost_obd *ost, struct ptlrpc_request *req)
 149 {
 150         struct obd_conn conn;
 151         int rc;
 152
 153         ENTRY;
 154
 155         conn.oc_id = req->rq_req.ost->connid;
 156         conn.oc_dev = ost->ost_tgt;
 157
 158         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 159                           &req->rq_replen, &req->rq_repbuf);
 160         if (rc) {
 161                 CERROR("cannot pack reply\n");
 162                 return rc;
 163         }
 164
 165         memcpy(&req->rq_rep.ost->oa, &req->rq_req.ost->oa,
 166                sizeof(req->rq_req.ost->oa));
 167
 168         req->rq_rep.ost->result =obd_create(&conn, &req->rq_rep.ost->oa);
 169
 170         EXIT;
 171         return 0;
 172 }
 173
 174 static int ost_punch(struct ost_obd *ost, struct ptlrpc_request *req)
 175 {
 176         struct obd_conn conn;
 177         int rc;
 178
 179         ENTRY;
 180
 181         conn.oc_id = req->rq_req.ost->connid;
 182         conn.oc_dev = ost->ost_tgt;
 183
 184         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 185                           &req->rq_replen, &req->rq_repbuf);
 186         if (rc) {
 187                 CERROR("cannot pack reply\n");
 188                 return rc;
 189         }
 190
 191         memcpy(&req->rq_rep.ost->oa, &req->rq_req.ost->oa,
 192                sizeof(req->rq_req.ost->oa));
 193
 194         req->rq_rep.ost->result = obd_punch(&conn, &req->rq_rep.ost->oa,
 195                                             req->rq_rep.ost->oa.o_size,
 196                                             req->rq_rep.ost->oa.o_blocks);
 197
 198         EXIT;
 199         return 0;
 200 }
 201
 202
 203 static int ost_setattr(struct ost_obd *ost, struct ptlrpc_request *req)
 204 {
 205         struct obd_conn conn;
 206         int rc;
 207
 208         ENTRY;
 209
 210         conn.oc_id = req->rq_req.ost->connid;
 211         conn.oc_dev = ost->ost_tgt;
 212
 213         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 214                           &req->rq_replen, &req->rq_repbuf);
 215         if (rc) {
 216                 CERROR("cannot pack reply\n");
 217                 return rc;
 218         }
 219
 220         memcpy(&req->rq_rep.ost->oa, &req->rq_req.ost->oa,
 221                sizeof(req->rq_req.ost->oa));
 222
 223         req->rq_rep.ost->result = obd_setattr(&conn, &req->rq_rep.ost->oa);
 224
 225         EXIT;
 226         return 0;
 227 }
 228
 229 static int ost_connect(struct ost_obd *ost, struct ptlrpc_request *req)
 230 {
 231         struct obd_conn conn;
 232         int rc;
 233
 234         ENTRY;
 235
 236         conn.oc_dev = ost->ost_tgt;
 237
 238         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 239                           &req->rq_replen, &req->rq_repbuf);
 240         if (rc) {
 241                 CERROR("cannot pack reply\n");
 242                 return rc;
 243         }
 244
 245         req->rq_rep.ost->result = obd_connect(&conn);
 246
 247         CDEBUG(D_IOCTL, "rep buffer %p, id %d\n", req->rq_repbuf, conn.oc_id);
 248         req->rq_rep.ost->connid = conn.oc_id;
 249         EXIT;
 250         return 0;
 251 }
 252
 253 static int ost_disconnect(struct ost_obd *ost, struct ptlrpc_request *req)
 254 {
 255         struct obd_conn conn;
 256         int rc;
 257
 258         ENTRY;
 259
 260         conn.oc_dev = ost->ost_tgt;
 261         conn.oc_id = req->rq_req.ost->connid;
 262
 263         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 264                           &req->rq_replen, &req->rq_repbuf);
 265         if (rc) {
 266                 CERROR("cannot pack reply\n");
 267                 return rc;
 268         }
 269         CDEBUG(D_IOCTL, "Disconnecting %d\n", conn.oc_id);
 270         req->rq_rep.ost->result = obd_disconnect(&conn);
 271
 272         EXIT;
 273         return 0;
 274 }
 275
 276 static int ost_get_info(struct ost_obd *ost, struct ptlrpc_request *req)
 277 {
 278         struct obd_conn conn;
 279         int rc;
 280         int vallen;
 281         void *val;
 282         char *ptr;
 283
 284         ENTRY;
 285
 286         conn.oc_id = req->rq_req.ost->connid;
 287         conn.oc_dev = ost->ost_tgt;
 288
 289         ptr = ost_req_buf1(req->rq_req.ost);
 290         req->rq_rep.ost->result = obd_get_info(&conn,
 291                                                req->rq_req.ost->buflen1, ptr,
 292                                                &vallen, &val);
 293
 294         rc = ost_pack_rep(val, vallen, NULL, 0, &req->rq_rephdr,
 295                           &req->rq_rep, &req->rq_replen, &req->rq_repbuf);
 296         if (rc) {
 297                 CERROR("cannot pack reply\n");
 298                 return rc;
 299         }
 300
 301         EXIT;
 302         return 0;
 303 }
 304
 305 static int ost_brw_read(struct ost_obd *obddev, struct ptlrpc_request *req)
 306 {
 307         struct ptlrpc_bulk_desc **bulk_vec = NULL;
 308         struct ptlrpc_bulk_desc *bulk = NULL;
 309         struct obd_conn conn;
 310         int rc;
 311         int i, j;
 312         int objcount, niocount;
 313         char *tmp1, *tmp2, *end2;
 314         char *res = NULL;
 315         int cmd;
 316         struct niobuf *nb, *src, *dst;
 317         struct obd_ioobj *ioo;
 318         struct ost_req *r = req->rq_req.ost;
 319
 320         ENTRY;
 321
 322         tmp1 = ost_req_buf1(r);
 323         tmp2 = ost_req_buf2(r);
 324         end2 = tmp2 + req->rq_req.ost->buflen2;
 325         objcount = r->buflen1 / sizeof(*ioo);
 326         niocount = r->buflen2 / sizeof(*nb);
 327         cmd = r->cmd;
 328
 329         conn.oc_id = req->rq_req.ost->connid;
 330         conn.oc_dev = req->rq_obd->u.ost.ost_tgt;
 331
 332         for (i = 0; i < objcount; i++) {
 333                 ost_unpack_ioo((void *)&tmp1, &ioo);
 334                 if (tmp2 + ioo->ioo_bufcnt > end2) {
 335                         rc = -EFAULT;
 336                         break;
 337                 }
 338                 for (j = 0; j < ioo->ioo_bufcnt; j++) {
 339                         ost_unpack_niobuf((void *)&tmp2, &nb);
 340                 }
 341         }
 342
 343         rc = ost_pack_rep(NULL, 0, NULL, 0,
 344                           &req->rq_rephdr, &req->rq_rep,
 345                           &req->rq_replen, &req->rq_repbuf);
 346         if (rc) {
 347                 CERROR("cannot pack reply\n");
 348                 return rc;
 349         }
 350         OBD_ALLOC(res, sizeof(struct niobuf) * niocount);
 351         if (res == NULL) {
 352                 EXIT;
 353                 return -ENOMEM;
 354         }
 355
 356         /* The unpackers move tmp1 and tmp2, so reset them before using */
 357         tmp1 = ost_req_buf1(r);
 358         tmp2 = ost_req_buf2(r);
 359         req->rq_rep.ost->result = obd_preprw
 360                 (cmd, &conn, objcount, (struct obd_ioobj *)tmp1,
 361                  niocount, (struct niobuf *)tmp2, (struct niobuf *)res);
 362
 363         if (req->rq_rep.ost->result) {
 364                 EXIT;
 365                 goto out;
 366         }
 367
 368         for (i = 0; i < niocount; i++) {
 369                 bulk = ptlrpc_prep_bulk(&req->rq_peer);
 370                 if (bulk == NULL) {
 371                         CERROR("cannot alloc bulk desc\n");
 372                         rc = -ENOMEM;
 373                         goto out;
 374                 }
 375
 376                 src = &((struct niobuf *)res)[i];
 377                 dst = &((struct niobuf *)tmp2)[i];
 378                 bulk->b_xid = dst->xid;
 379                 bulk->b_buf = (void *)(unsigned long)src->addr;
 380                 bulk->b_buflen = PAGE_SIZE;
 381                 rc = ptlrpc_send_bulk(bulk, OST_BULK_PORTAL);
 382                 if (rc) {
 383                         EXIT;
 384                         goto out;
 385                 }
 386                 wait_event_interruptible(bulk->b_waitq,
 387                                          ptlrpc_check_bulk_sent(bulk));
 388
 389                 if (bulk->b_flags == PTL_RPC_INTR) {
 390                         EXIT;
 391                         goto out;
 392                 }
 393
 394                 OBD_FREE(bulk, sizeof(*bulk));
 395                 bulk = NULL;
 396         }
 397
 398 #if 0
 399         /* Local delivery */
 400         dst = &((struct niobuf *)tmp2)[i];
 401         memcpy((void *)(unsigned long)dst->addr,
 402                (void *)(unsigned long)src->addr, PAGE_SIZE);
 403 #endif
 404         barrier();
 405
 406         /* The unpackers move tmp1 and tmp2, so reset them before using */
 407         tmp1 = ost_req_buf1(r);
 408         tmp2 = ost_req_buf2(r);
 409         req->rq_rep.ost->result = obd_commitrw
 410                 (cmd, &conn, objcount, (struct obd_ioobj *)tmp1,
 411                  niocount, (struct niobuf *)res);
 412
 413  out:
 414         if (res != NULL)
 415                 OBD_FREE(res, sizeof(struct niobuf) * niocount);
 416         if (bulk != NULL)
 417                 OBD_FREE(bulk, sizeof(*bulk));
 418         if (bulk_vec != NULL) {
 419                 for (i = 0; i < niocount; i++) {
 420                         if (bulk_vec[i] != NULL)
 421                                 OBD_FREE(bulk_vec[i], sizeof(*bulk));
 422                 }
 423                 OBD_FREE(bulk_vec,
 424                          niocount * sizeof(struct ptlrpc_bulk_desc *));
 425         }
 426
 427         EXIT;
 428         return 0;
 429 }
 430
 431 static int ost_commit_page(struct obd_conn *conn, struct page *page)
 432 {
 433         struct obd_ioobj obj;
 434         struct niobuf buf;
 435         int rc;
 436         ENTRY;
 437
 438         memset(&buf, 0, sizeof(buf));
 439         memset(&obj, 0, sizeof(obj));
 440
 441         buf.page = page;
 442         obj.ioo_bufcnt = 1;
 443
 444         rc = obd_commitrw(OBD_BRW_WRITE, conn, 1, &obj, 1, &buf);
 445         EXIT;
 446         return rc;
 447 }
 448
 449 static int ost_brw_write_cb(struct ptlrpc_bulk_desc *bulk, void *data)
 450 {
 451         int rc;
 452
 453         ENTRY;
 454
 455         rc = ost_commit_page(&bulk->b_conn, bulk->b_page);
 456         if (rc)
 457                 CERROR("ost_commit_page failed: %d\n", rc);
 458
 459         EXIT;
 460         return rc;
 461 }
 462
 463 int ost_brw_write(struct ost_obd *obddev, struct ptlrpc_request *req)
 464 {
 465         struct obd_conn conn;
 466         int rc;
 467         int i, j;
 468         int objcount, niocount;
 469         char *tmp1, *tmp2, *end2;
 470         char *res;
 471         int cmd;
 472         struct niobuf *nb, *dst;
 473         struct obd_ioobj *ioo;
 474         struct ost_req *r = req->rq_req.ost;
 475
 476         ENTRY;
 477
 478         tmp1 = ost_req_buf1(r);
 479         tmp2 = ost_req_buf2(r);
 480         end2 = tmp2 + req->rq_req.ost->buflen2;
 481         objcount = r->buflen1 / sizeof(*ioo);
 482         niocount = r->buflen2 / sizeof(*nb);
 483         cmd = r->cmd;
 484
 485         conn.oc_id = req->rq_req.ost->connid;
 486         conn.oc_dev = req->rq_obd->u.ost.ost_tgt;
 487
 488         for (i = 0; i < objcount; i++) {
 489                 ost_unpack_ioo((void *)&tmp1, &ioo);
 490                 if (tmp2 + ioo->ioo_bufcnt > end2) {
 491                         rc = -EFAULT;
 492                         break;
 493                 }
 494                 for (j = 0; j < ioo->ioo_bufcnt; j++) {
 495                         ost_unpack_niobuf((void *)&tmp2, &nb);
 496                 }
 497         }
 498
 499         rc = ost_pack_rep(NULL, 0, NULL, niocount * sizeof(*nb),
 500                           &req->rq_rephdr, &req->rq_rep,
 501                           &req->rq_replen, &req->rq_repbuf);
 502         if (rc) {
 503                 CERROR("cannot pack reply\n");
 504                 return rc;
 505         }
 506         res = ost_rep_buf2(req->rq_rep.ost);
 507
 508         /* The unpackers move tmp1 and tmp2, so reset them before using */
 509         tmp1 = ost_req_buf1(r);
 510         tmp2 = ost_req_buf2(r);
 511         req->rq_rep.ost->result = obd_preprw
 512                 (cmd, &conn, objcount, (struct obd_ioobj *)tmp1,
 513                  niocount, (struct niobuf *)tmp2, (struct niobuf *)res);
 514
 515         if (req->rq_rep.ost->result) {
 516                 EXIT;
 517                 goto out;
 518         }
 519
 520         for (i = 0; i < niocount; i++) {
 521                 struct ptlrpc_bulk_desc *bulk;
 522                 struct ptlrpc_service *srv = req->rq_obd->u.ost.ost_service;
 523
 524                 bulk = ptlrpc_prep_bulk(&req->rq_peer);
 525                 if (bulk == NULL) {
 526                         CERROR("cannot alloc bulk desc\n");
 527                         rc = -ENOMEM;
 528                         goto out;
 529                 }
 530
 531                 spin_lock(&srv->srv_lock);
 532                 bulk->b_xid = srv->srv_xid++;
 533                 spin_unlock(&srv->srv_lock);
 534
 535                 dst = &((struct niobuf *)res)[i];
 536                 dst->xid = HTON__u32(bulk->b_xid);
 537
 538                 bulk->b_buf = (void *)(unsigned long)dst->addr;
 539                 bulk->b_cb = ost_brw_write_cb;
 540                 bulk->b_page = dst->page;
 541                 memcpy(&(bulk->b_conn), &conn, sizeof(conn));
 542                 bulk->b_buflen = PAGE_SIZE;
 543                 bulk->b_portal = OSC_BULK_PORTAL;
 544                 rc = ptlrpc_register_bulk(bulk);
 545                 if (rc)
 546                         goto out;
 547
 548 #if 0
 549                 /* Local delivery */
 550                 src = &((struct niobuf *)tmp2)[i];
 551                 memcpy((void *)(unsigned long)dst->addr,
 552                        (void *)(unsigned long)src->addr, src->len);
 553 #endif
 554         }
 555         barrier();
 556
 557  out:
 558         EXIT;
 559         return 0;
 560 }
 561
 562 int ost_brw(struct ost_obd *obddev, struct ptlrpc_request *req)
 563 {
 564         struct ost_req *r = req->rq_req.ost;
 565         int cmd = r->cmd;
 566
 567         if (cmd == OBD_BRW_READ)
 568                 return ost_brw_read(obddev, req);
 569         else
 570                 return ost_brw_write(obddev, req);
 571 }
 572
 573 static int ost_handle(struct obd_device *obddev,
 574                struct ptlrpc_service *svc,
 575                struct ptlrpc_request *req)
 576 {
 577         int rc;
 578         struct ost_obd *ost = &obddev->u.ost;
 579         struct ptlreq_hdr *hdr;
 580
 581         ENTRY;
 582
 583         hdr = (struct ptlreq_hdr *)req->rq_reqbuf;
 584         if (NTOH__u32(hdr->type) != OST_TYPE_REQ) {
 585                 CERROR("lustre_ost: wrong packet type sent %d\n",
 586                        NTOH__u32(hdr->type));
 587                 rc = -EINVAL;
 588                 goto out;
 589         }
 590
 591         rc = ost_unpack_req(req->rq_reqbuf, req->rq_reqlen,
 592                             &req->rq_reqhdr, &req->rq_req);
 593         if (rc) {
 594                 CERROR("lustre_ost: Invalid request\n");
 595                 EXIT;
 596                 goto out;
 597         }
 598
 599         switch (req->rq_reqhdr->opc) {
 600
 601         case OST_CONNECT:
 602                 CDEBUG(D_INODE, "connect\n");
 603                 rc = ost_connect(ost, req);
 604                 break;
 605         case OST_DISCONNECT:
 606                 CDEBUG(D_INODE, "disconnect\n");
 607                 rc = ost_disconnect(ost, req);
 608                 break;
 609         case OST_GET_INFO:
 610                 CDEBUG(D_INODE, "get_info\n");
 611                 rc = ost_get_info(ost, req);
 612                 break;
 613         case OST_CREATE:
 614                 CDEBUG(D_INODE, "create\n");
 615                 rc = ost_create(ost, req);
 616                 break;
 617         case OST_DESTROY:
 618                 CDEBUG(D_INODE, "destroy\n");
 619                 rc = ost_destroy(ost, req);
 620                 break;
 621         case OST_GETATTR:
 622                 CDEBUG(D_INODE, "getattr\n");
 623                 rc = ost_getattr(ost, req);
 624                 break;
 625         case OST_SETATTR:
 626                 CDEBUG(D_INODE, "setattr\n");
 627                 rc = ost_setattr(ost, req);
 628                 break;
 629         case OST_OPEN:
 630                 CDEBUG(D_INODE, "setattr\n");
 631                 rc = ost_open(ost, req);
 632                 break;
 633         case OST_CLOSE:
 634                 CDEBUG(D_INODE, "setattr\n");
 635                 rc = ost_close(ost, req);
 636                 break;
 637         case OST_BRW:
 638                 CDEBUG(D_INODE, "brw\n");
 639                 rc = ost_brw(ost, req);
 640                 break;
 641         case OST_PUNCH:
 642                 CDEBUG(D_INODE, "punch\n");
 643                 rc = ost_punch(ost, req);
 644                 break;
 645         default:
 646                 req->rq_status = -ENOTSUPP;
 647                 return ptlrpc_error(obddev, svc, req);
 648         }
 649
 650 out:
 651         req->rq_status = rc;
 652         if (rc) {
 653                 CERROR("ost: processing error %d\n", rc);
 654                 ptlrpc_error(obddev, svc, req);
 655         } else {
 656                 CDEBUG(D_INODE, "sending reply\n");
 657                 ptlrpc_reply(obddev, svc, req);
 658         }
 659
 660         return 0;
 661 }
 662
 663
 664 /* mount the file system (secretly) */
 665 static int ost_setup(struct obd_device *obddev, obd_count len,
 666                         void *buf)
 667
 668 {
 669         struct obd_ioctl_data* data = buf;
 670         struct ost_obd *ost = &obddev->u.ost;
 671         struct obd_device *tgt;
 672         int err;
 673         ENTRY;
 674
 675         if (data->ioc_dev  < 0 || data->ioc_dev > MAX_OBD_DEVICES) {
 676                 EXIT;
 677                 return -ENODEV;
 678         }
 679
 680         tgt = &obd_dev[data->ioc_dev];
 681         ost->ost_tgt = tgt;
 682         if ( ! (tgt->obd_flags & OBD_ATTACHED) ||
 683              ! (tgt->obd_flags & OBD_SET_UP) ){
 684                 CERROR("device not attached or not set up (%d)\n",
 685                        data->ioc_dev);
 686                 EXIT;
 687                 return -EINVAL;
 688         }
 689
 690         ost->ost_conn.oc_dev = tgt;
 691         err = obd_connect(&ost->ost_conn);
 692         if (err) {
 693                 CERROR("fail to connect to device %d\n", data->ioc_dev);
 694                 return -EINVAL;
 695         }
 696
 697         ost->ost_service = ptlrpc_init_svc( 64 * 1024,
 698                                             OST_REQUEST_PORTAL,
 699                                             OSC_REPLY_PORTAL,
 700                                             "self",
 701                                             ost_unpack_req,
 702                                             ost_pack_rep,
 703                                             ost_handle);
 704         if (!ost->ost_service) {
 705                 obd_disconnect(&ost->ost_conn);
 706                 return -EINVAL;
 707         }
 708
 709         rpc_register_service(ost->ost_service, "self");
 710
 711         err = ptlrpc_start_thread(obddev, ost->ost_service, "lustre_ost");
 712         if (err) {
 713                 obd_disconnect(&ost->ost_conn);
 714                 return -EINVAL;
 715         }
 716
 717         MOD_INC_USE_COUNT;
 718         EXIT;
 719         return 0;
 720 }
 721
 722 static int ost_cleanup(struct obd_device * obddev)
 723 {
 724         struct ost_obd *ost = &obddev->u.ost;
 725         int err;
 726
 727         ENTRY;
 728
 729         if ( !list_empty(&obddev->obd_gen_clients) ) {
 730                 CERROR("still has clients!\n");
 731                 EXIT;
 732                 return -EBUSY;
 733         }
 734
 735         ptlrpc_stop_thread(ost->ost_service);
 736         rpc_unregister_service(ost->ost_service);
 737
 738         if (!list_empty(&ost->ost_service->srv_reqs)) {
 739                 // XXX reply with errors and clean up
 740                 CERROR("Request list not empty!\n");
 741         }
 742         OBD_FREE(ost->ost_service, sizeof(*ost->ost_service));
 743
 744         err = obd_disconnect(&ost->ost_conn);
 745         if (err) {
 746                 CERROR("lustre ost: fail to disconnect device\n");
 747                 return -EINVAL;
 748         }
 749
 750         MOD_DEC_USE_COUNT;
 751         EXIT;
 752         return 0;
 753 }
 754
 755 /* use obd ops to offer management infrastructure */
 756 static struct obd_ops ost_obd_ops = {
 757         o_setup:       ost_setup,
 758         o_cleanup:     ost_cleanup,
 759 };
 760
 761 static int __init ost_init(void)
 762 {
 763         obd_register_type(&ost_obd_ops, LUSTRE_OST_NAME);
 764         return 0;
 765 }
 766
 767 static void __exit ost_exit(void)
 768 {
 769         obd_unregister_type(LUSTRE_OST_NAME);
 770 }
 771
 772 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
 773 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
 774 MODULE_LICENSE("GPL");
 775
 776 module_init(ost_init);
 777 module_exit(ost_exit);