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 #include <linux/lustre_dlm.h>
  40
  41 static int ost_destroy(struct ptlrpc_request *req)
  42 {
  43         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
  44         struct ost_body *body;
  45         int rc, size = sizeof(*body);
  46         ENTRY;
  47
  48         body = lustre_msg_buf(req->rq_reqmsg, 0);
  49
  50         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
  51         if (rc)
  52                 RETURN(rc);
  53
  54         req->rq_status = obd_destroy(conn, &body->oa);
  55         RETURN(0);
  56 }
  57
  58 static int ost_getattr(struct ptlrpc_request *req)
  59 {
  60         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
  61         struct ost_body *body, *repbody;
  62         int rc, size = sizeof(*body);
  63         ENTRY;
  64
  65         body = lustre_msg_buf(req->rq_reqmsg, 0);
  66
  67         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
  68         if (rc)
  69                 RETURN(rc);
  70
  71         repbody = lustre_msg_buf(req->rq_repmsg, 0);
  72         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
  73         req->rq_status = obd_getattr(conn, &repbody->oa);
  74         RETURN(0);
  75 }
  76
  77 static int ost_open(struct ptlrpc_request *req)
  78 {
  79         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
  80         struct ost_body *body, *repbody;
  81         int rc, size = sizeof(*body);
  82         ENTRY;
  83
  84         body = lustre_msg_buf(req->rq_reqmsg, 0);
  85
  86         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
  87         if (rc)
  88                 RETURN(rc);
  89
  90         repbody = lustre_msg_buf(req->rq_repmsg, 0);
  91         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
  92         req->rq_status = obd_open(conn, &repbody->oa);
  93         RETURN(0);
  94 }
  95
  96 static int ost_close(struct ptlrpc_request *req)
  97 {
  98         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
  99         struct ost_body *body, *repbody;
 100         int rc, size = sizeof(*body);
 101         ENTRY;
 102
 103         body = lustre_msg_buf(req->rq_reqmsg, 0);
 104
 105         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 106         if (rc)
 107                 RETURN(rc);
 108
 109         repbody = lustre_msg_buf(req->rq_repmsg, 0);
 110         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 111         req->rq_status = obd_close(conn, &repbody->oa);
 112         RETURN(0);
 113 }
 114
 115 static int ost_create(struct ptlrpc_request *req)
 116 {
 117         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
 118         struct ost_body *body, *repbody;
 119         int rc, size = sizeof(*body);
 120         ENTRY;
 121
 122         body = lustre_msg_buf(req->rq_reqmsg, 0);
 123
 124         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 125         if (rc)
 126                 RETURN(rc);
 127
 128         repbody = lustre_msg_buf(req->rq_repmsg, 0);
 129         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 130         req->rq_status = obd_create(conn, &repbody->oa);
 131         RETURN(0);
 132 }
 133
 134 static int ost_punch(struct ptlrpc_request *req)
 135 {
 136         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
 137         struct ost_body *body, *repbody;
 138         int rc, size = sizeof(*body);
 139         ENTRY;
 140
 141         body = lustre_msg_buf(req->rq_reqmsg, 0);
 142
 143         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 144         if (rc)
 145                 RETURN(rc);
 146
 147         repbody = lustre_msg_buf(req->rq_repmsg, 0);
 148         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 149         req->rq_status = obd_punch(conn, &repbody->oa,
 150                                    repbody->oa.o_blocks, repbody->oa.o_size);
 151         RETURN(0);
 152 }
 153
 154 static int ost_setattr(struct ptlrpc_request *req)
 155 {
 156         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
 157         struct ost_body *body, *repbody;
 158         int rc, size = sizeof(*body);
 159         ENTRY;
 160
 161         body = lustre_msg_buf(req->rq_reqmsg, 0);
 162
 163         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 164         if (rc)
 165                 RETURN(rc);
 166
 167         repbody = lustre_msg_buf(req->rq_repmsg, 0);
 168         memcpy(&repbody->oa, &body->oa, sizeof(body->oa));
 169         req->rq_status = obd_setattr(conn, &repbody->oa);
 170         RETURN(0);
 171 }
 172
 173 static int ost_connect(struct ptlrpc_request *req)
 174 {
 175         struct ost_body *body;
 176         struct obd_device *target;
 177         struct obd_conn conn;
 178         char *uuid;
 179         int rc, size = sizeof(*body), i;
 180         ENTRY;
 181
 182         uuid = lustre_msg_buf(req->rq_reqmsg, 0);
 183         if (req->rq_reqmsg->buflens[0] > 37) {
 184                 /* Invalid UUID */
 185                 req->rq_status = -EINVAL;
 186                 RETURN(0);
 187         }
 188
 189         i = obd_class_uuid2dev(uuid);
 190         if (i == -1) {
 191                 req->rq_status = -ENODEV;
 192                 RETURN(0);
 193         }
 194
 195         target = &obd_dev[i];
 196         if (!target) {
 197                 req->rq_status = -ENODEV;
 198                 RETURN(0);
 199         }
 200
 201         conn.addr = req->rq_reqmsg->conn;
 202         conn.cookie = req->rq_reqmsg->token;
 203
 204         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 205         if (rc)
 206                 RETURN(rc);
 207
 208         req->rq_status = obd_connect(&conn, target);
 209         req->rq_repmsg->conn = conn.addr;
 210         req->rq_repmsg->token = conn.cookie;
 211
 212         CDEBUG(D_IOCTL, "rep buffer %p, id %d\n", req->rq_repmsg, conn.oc_id);
 213         body = lustre_msg_buf(req->rq_repmsg, 0);
 214         body->connid = conn.oc_id;
 215         RETURN(0);
 216 }
 217
 218 static int ost_disconnect(struct ptlrpc_request *req)
 219 {
 220         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
 221         struct ost_body *body;
 222         int rc;
 223         ENTRY;
 224
 225         body = lustre_msg_buf(req->rq_reqmsg, 0);
 226
 227         rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
 228         if (rc)
 229                 RETURN(rc);
 230
 231         req->rq_status = obd_disconnect(conn);
 232         RETURN(0);
 233 }
 234
 235 static int ost_get_info(struct ptlrpc_request *req)
 236 {
 237         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
 238         struct ost_body *body;
 239         int rc, size[2] = {sizeof(*body)};
 240         char *bufs[2] = {NULL, NULL}, *ptr;
 241         ENTRY;
 242
 243         body = lustre_msg_buf(req->rq_reqmsg, 0);
 244
 245         ptr = lustre_msg_buf(req->rq_reqmsg, 1);
 246         if (!ptr)
 247                 RETURN(-EINVAL);
 248
 249         req->rq_status = obd_get_info(conn, req->rq_reqmsg->buflens[1], ptr,
 250                                       &(size[1]), (void **)&(bufs[1]));
 251
 252         rc = lustre_pack_msg(2, size, bufs, &req->rq_replen, &req->rq_repmsg);
 253         if (rc)
 254                 CERROR("cannot pack reply\n");
 255
 256         RETURN(rc);
 257 }
 258
 259 static int ost_brw_read(struct ptlrpc_request *req)
 260 {
 261         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
 262         struct ptlrpc_bulk_desc *desc;
 263         void *tmp1, *tmp2, *end2;
 264         struct niobuf_remote *remote_nb;
 265         struct niobuf_local *local_nb = NULL;
 266         struct obd_ioobj *ioo;
 267         struct ost_body *body;
 268         int rc, cmd, i, j, objcount, niocount, size = sizeof(*body);
 269         ENTRY;
 270
 271         body = lustre_msg_buf(req->rq_reqmsg, 0);
 272         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 273         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 274         end2 = (char *)tmp2 + req->rq_reqmsg->buflens[2];
 275         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 276         niocount = req->rq_reqmsg->buflens[2] / sizeof(*remote_nb);
 277         cmd = body->data;
 278
 279         for (i = 0; i < objcount; i++) {
 280                 ost_unpack_ioo(&tmp1, &ioo);
 281                 if (tmp2 + ioo->ioo_bufcnt > end2) {
 282                         LBUG();
 283                         GOTO(out, rc = -EFAULT);
 284                 }
 285                 for (j = 0; j < ioo->ioo_bufcnt; j++)
 286                         ost_unpack_niobuf(&tmp2, &remote_nb);
 287         }
 288
 289         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 290         if (rc)
 291                 RETURN(rc);
 292         OBD_ALLOC(local_nb, sizeof(*local_nb) * niocount);
 293         if (local_nb == NULL)
 294                 RETURN(-ENOMEM);
 295
 296         /* The unpackers move tmp1 and tmp2, so reset them before using */
 297         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 298         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 299         req->rq_status = obd_preprw(cmd, conn, objcount,
 300                                     tmp1, niocount, tmp2, local_nb, NULL);
 301
 302         if (req->rq_status)
 303                 GOTO(out_local, 0);
 304
 305         desc = ptlrpc_prep_bulk(req->rq_connection);
 306         if (desc == NULL)
 307                 GOTO(out_local, rc = -ENOMEM);
 308         desc->b_portal = OST_BULK_PORTAL;
 309
 310         for (i = 0; i < niocount; i++) {
 311                 struct ptlrpc_bulk_page *bulk;
 312                 bulk = ptlrpc_prep_bulk_page(desc);
 313                 if (bulk == NULL)
 314                         GOTO(out_bulk, rc = -ENOMEM);
 315                 remote_nb = &(((struct niobuf_remote *)tmp2)[i]);
 316                 bulk->b_xid = remote_nb->xid;
 317                 bulk->b_buf = (void *)(unsigned long)local_nb[i].addr;
 318                 bulk->b_buflen = PAGE_SIZE;
 319         }
 320
 321         rc = ptlrpc_send_bulk(desc);
 322         if (rc)
 323                 GOTO(out_bulk, rc);
 324
 325         wait_event_interruptible(desc->b_waitq, ptlrpc_check_bulk_sent(desc));
 326         if (desc->b_flags & PTL_RPC_FL_INTR)
 327                 rc = -EINTR;
 328
 329         /* The unpackers move tmp1 and tmp2, so reset them before using */
 330         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 331         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 332         req->rq_status = obd_commitrw(cmd, conn, objcount,
 333                                       tmp1, niocount, local_nb, NULL);
 334
 335 out_bulk:
 336         ptlrpc_free_bulk(desc);
 337 out_local:
 338         OBD_FREE(local_nb, sizeof(*local_nb) * niocount);
 339 out:
 340         if (rc)
 341                 ptlrpc_error(req->rq_svc, req);
 342         else
 343                 ptlrpc_reply(req->rq_svc, req);
 344         RETURN(rc);
 345 }
 346
 347 static int ost_brw_write(struct ptlrpc_request *req)
 348 {
 349         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
 350         struct ptlrpc_bulk_desc *desc;
 351         struct niobuf_remote *remote_nb;
 352         struct niobuf_local *local_nb, *lnb;
 353         struct obd_ioobj *ioo;
 354         struct ost_body *body;
 355         int cmd, rc, i, j, objcount, niocount, size[2] = {sizeof(*body)};
 356         void *tmp1, *tmp2, *end2;
 357         void *desc_priv = NULL;
 358         int reply_sent = 0;
 359         ENTRY;
 360
 361         body = lustre_msg_buf(req->rq_reqmsg, 0);
 362         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 363         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 364         end2 = (char *)tmp2 + req->rq_reqmsg->buflens[2];
 365         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 366         niocount = req->rq_reqmsg->buflens[2] / sizeof(*remote_nb);
 367         cmd = body->data;
 368
 369         for (i = 0; i < objcount; i++) {
 370                 ost_unpack_ioo((void *)&tmp1, &ioo);
 371                 if (tmp2 + ioo->ioo_bufcnt > end2) {
 372                         rc = -EFAULT;
 373                         break;
 374                 }
 375                 for (j = 0; j < ioo->ioo_bufcnt; j++)
 376                         ost_unpack_niobuf((void *)&tmp2, &remote_nb);
 377         }
 378
 379         size[1] = niocount * sizeof(*remote_nb);
 380         rc = lustre_pack_msg(2, size, NULL, &req->rq_replen, &req->rq_repmsg);
 381         if (rc)
 382                 GOTO(out, rc);
 383         remote_nb = lustre_msg_buf(req->rq_repmsg, 1);
 384
 385         OBD_ALLOC(local_nb, niocount * sizeof(*local_nb));
 386         if (local_nb == NULL)
 387                 GOTO(out, rc = -ENOMEM);
 388
 389         /* The unpackers move tmp1 and tmp2, so reset them before using */
 390         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 391         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 392         req->rq_status = obd_preprw(cmd, conn, objcount,
 393                                     tmp1, niocount, tmp2, local_nb, &desc_priv);
 394         if (req->rq_status)
 395                 GOTO(out_free, rc = 0); /* XXX is this correct? */
 396
 397         desc = ptlrpc_prep_bulk(req->rq_connection);
 398         if (desc == NULL)
 399                 GOTO(fail_preprw, rc = -ENOMEM);
 400         desc->b_cb = NULL;
 401         desc->b_portal = OSC_BULK_PORTAL;
 402         desc->b_desc_private = desc_priv;
 403         memcpy(&(desc->b_conn), &conn, sizeof(conn));
 404
 405         for (i = 0, lnb = local_nb; i < niocount; i++, lnb++) {
 406                 struct ptlrpc_service *srv = req->rq_obd->u.ost.ost_service;
 407                 struct ptlrpc_bulk_page *bulk;
 408
 409                 bulk = ptlrpc_prep_bulk_page(desc);
 410                 if (bulk == NULL)
 411                         GOTO(fail_bulk, rc = -ENOMEM);
 412
 413                 spin_lock(&srv->srv_lock);
 414                 bulk->b_xid = srv->srv_xid++;
 415                 spin_unlock(&srv->srv_lock);
 416
 417                 bulk->b_buf = lnb->addr;
 418                 bulk->b_page = lnb->page;
 419                 bulk->b_flags = lnb->flags;
 420                 bulk->b_dentry = lnb->dentry;
 421                 bulk->b_buflen = PAGE_SIZE;
 422                 bulk->b_cb = NULL;
 423
 424                 /* this advances remote_nb */
 425                 ost_pack_niobuf((void **)&remote_nb, lnb->offset, lnb->len, 0,
 426                                 bulk->b_xid);
 427         }
 428
 429         rc = ptlrpc_register_bulk(desc);
 430         if (rc)
 431                 GOTO(fail_bulk, rc);
 432
 433         reply_sent = 1;
 434         ptlrpc_reply(req->rq_svc, req);
 435
 436         wait_event_interruptible(desc->b_waitq,
 437                                  desc->b_flags & PTL_BULK_FL_RCVD);
 438
 439         rc = obd_commitrw(cmd, conn, objcount, tmp1, niocount, local_nb,
 440                           desc->b_desc_private);
 441         ptlrpc_free_bulk(desc);
 442         EXIT;
 443 out_free:
 444         OBD_FREE(local_nb, niocount * sizeof(*local_nb));
 445 out:
 446         if (!reply_sent) {
 447                 if (rc)
 448                         ptlrpc_error(req->rq_svc, req);
 449                 else
 450                         ptlrpc_reply(req->rq_svc, req);
 451         }
 452         return rc;
 453
 454 fail_bulk:
 455         ptlrpc_free_bulk(desc);
 456 fail_preprw:
 457         /* FIXME: how do we undo the preprw? */
 458         goto out_free;
 459 }
 460
 461 static int ost_brw(struct ptlrpc_request *req)
 462 {
 463         struct ost_body *body = lustre_msg_buf(req->rq_reqmsg, 0);
 464
 465         if (body->data & OBD_BRW_WRITE)
 466                 return ost_brw_write(req);
 467         else
 468                 return ost_brw_read(req);
 469 }
 470
 471
 472 static int ost_handle(struct ptlrpc_request *req)
 473 {
 474         int rc;
 475         ENTRY;
 476
 477         rc = lustre_unpack_msg(req->rq_reqmsg, req->rq_reqlen);
 478         if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_HANDLE_UNPACK)) {
 479                 CERROR("lustre_mds: Invalid request\n");
 480                 GOTO(out, rc);
 481         }
 482
 483         if (req->rq_reqmsg->type != PTL_RPC_MSG_REQUEST) {
 484                 CERROR("lustre_mds: wrong packet type sent %d\n",
 485                        req->rq_reqmsg->type);
 486                 GOTO(out, rc = -EINVAL);
 487         }
 488
 489         if (req->rq_reqmsg->opc != OST_CONNECT) {
 490                 struct obd_export *export;
 491                 export = gen_client((struct obd_conn *) req->rq_reqmsg);
 492                 if (!export)
 493                         GOTO(out, rc = -ENOTCONN);
 494                 if (strcmp(req->rq_obd->obd_type->typ_name, "ost") != 0)
 495                         GOTO(out, rc = -EINVAL);
 496         }
 497
 498         switch (req->rq_reqmsg->opc) {
 499         case OST_CONNECT:
 500                 CDEBUG(D_INODE, "connect\n");
 501                 OBD_FAIL_RETURN(OBD_FAIL_OST_CONNECT_NET, 0);
 502                 rc = ost_connect(req);
 503                 break;
 504         case OST_DISCONNECT:
 505                 CDEBUG(D_INODE, "disconnect\n");
 506                 OBD_FAIL_RETURN(OBD_FAIL_OST_DISCONNECT_NET, 0);
 507                 rc = ost_disconnect(req);
 508                 break;
 509         case OST_GET_INFO:
 510                 CDEBUG(D_INODE, "get_info\n");
 511                 OBD_FAIL_RETURN(OBD_FAIL_OST_GET_INFO_NET, 0);
 512                 rc = ost_get_info(req);
 513                 break;
 514         case OST_CREATE:
 515                 CDEBUG(D_INODE, "create\n");
 516                 OBD_FAIL_RETURN(OBD_FAIL_OST_CREATE_NET, 0);
 517                 rc = ost_create(req);
 518                 break;
 519         case OST_DESTROY:
 520                 CDEBUG(D_INODE, "destroy\n");
 521                 OBD_FAIL_RETURN(OBD_FAIL_OST_DESTROY_NET, 0);
 522                 rc = ost_destroy(req);
 523                 break;
 524         case OST_GETATTR:
 525                 CDEBUG(D_INODE, "getattr\n");
 526                 OBD_FAIL_RETURN(OBD_FAIL_OST_GETATTR_NET, 0);
 527                 rc = ost_getattr(req);
 528                 break;
 529         case OST_SETATTR:
 530                 CDEBUG(D_INODE, "setattr\n");
 531                 OBD_FAIL_RETURN(OBD_FAIL_OST_SETATTR_NET, 0);
 532                 rc = ost_setattr(req);
 533                 break;
 534         case OST_OPEN:
 535                 CDEBUG(D_INODE, "setattr\n");
 536                 OBD_FAIL_RETURN(OBD_FAIL_OST_OPEN_NET, 0);
 537                 rc = ost_open(req);
 538                 break;
 539         case OST_CLOSE:
 540                 CDEBUG(D_INODE, "setattr\n");
 541                 OBD_FAIL_RETURN(OBD_FAIL_OST_CLOSE_NET, 0);
 542                 rc = ost_close(req);
 543                 break;
 544         case OST_BRW:
 545                 CDEBUG(D_INODE, "brw\n");
 546                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 547                 rc = ost_brw(req);
 548                 /* ost_brw sends its own replies */
 549                 RETURN(rc);
 550         case OST_PUNCH:
 551                 CDEBUG(D_INODE, "punch\n");
 552                 OBD_FAIL_RETURN(OBD_FAIL_OST_PUNCH_NET, 0);
 553                 rc = ost_punch(req);
 554                 break;
 555 #if 0
 556         case OST_STATFS:
 557                 CDEBUG(D_INODE, "statfs\n");
 558                 OBD_FAIL_RETURN(OBD_FAIL_OST_STATFS_NET, 0);
 559                 rc = ost_statfs(req);
 560                 break;
 561 #endif
 562         default:
 563                 req->rq_status = -ENOTSUPP;
 564                 rc = ptlrpc_error(req->rq_svc, req);
 565                 RETURN(rc);
 566         }
 567
 568         EXIT;
 569 out:
 570         //req->rq_status = rc;
 571         if (rc) {
 572                 CERROR("ost: processing error %d\n", rc);
 573                 ptlrpc_error(req->rq_svc, req);
 574         } else {
 575                 CDEBUG(D_INODE, "sending reply\n");
 576                 ptlrpc_reply(req->rq_svc, req);
 577         }
 578
 579         return 0;
 580 }
 581
 582 #define OST_NUM_THREADS 6
 583
 584 /* mount the file system (secretly) */
 585 static int ost_setup(struct obd_device *obddev, obd_count len, void *buf)
 586 {
 587         struct obd_ioctl_data* data = buf;
 588         struct ost_obd *ost = &obddev->u.ost;
 589         struct obd_device *tgt;
 590         int err;
 591         int i;
 592         ENTRY;
 593
 594         if (data->ioc_dev < 0 || data->ioc_dev > MAX_OBD_DEVICES)
 595                 RETURN(-ENODEV);
 596
 597         MOD_INC_USE_COUNT;
 598         tgt = &obd_dev[data->ioc_dev];
 599         if (!(tgt->obd_flags & OBD_ATTACHED) ||
 600             !(tgt->obd_flags & OBD_SET_UP)) {
 601                 CERROR("device not attached or not set up (%d)\n",
 602                        data->ioc_dev);
 603                 GOTO(error_dec, err = -EINVAL);
 604         }
 605
 606         err = obd_connect(&ost->ost_conn, tgt);
 607         if (err) {
 608                 CERROR("fail to connect to device %d\n", data->ioc_dev);
 609                 GOTO(error_dec, err = -EINVAL);
 610         }
 611
 612         obddev->obd_namespace =
 613                 ldlm_namespace_new("ost", LDLM_NAMESPACE_SERVER);
 614         if (obddev->obd_namespace == NULL)
 615                 LBUG();
 616
 617         ost->ost_service = ptlrpc_init_svc(64 * 1024, OST_REQUEST_PORTAL,
 618                                            OSC_REPLY_PORTAL, "self",ost_handle);
 619         if (!ost->ost_service) {
 620                 CERROR("failed to start service\n");
 621                 GOTO(error_disc, err = -EINVAL);
 622         }
 623
 624         for (i = 0; i < OST_NUM_THREADS; i++) {
 625                 err = ptlrpc_start_thread(obddev, ost->ost_service,
 626                                           "lustre_ost");
 627                 if (err) {
 628                         CERROR("error starting thread #%d: rc %d\n", i, err);
 629                         GOTO(error_disc, err = -EINVAL);
 630                 }
 631         }
 632
 633         RETURN(0);
 634
 635 error_disc:
 636         obd_disconnect(&ost->ost_conn);
 637 error_dec:
 638         MOD_DEC_USE_COUNT;
 639         RETURN(err);
 640 }
 641
 642 static int ost_cleanup(struct obd_device * obddev)
 643 {
 644         struct ost_obd *ost = &obddev->u.ost;
 645         int err;
 646
 647         ENTRY;
 648
 649         if ( !list_empty(&obddev->obd_exports) ) {
 650                 CERROR("still has clients!\n");
 651                 RETURN(-EBUSY);
 652         }
 653
 654         ptlrpc_stop_all_threads(ost->ost_service);
 655         ptlrpc_unregister_service(ost->ost_service);
 656
 657         err = obd_disconnect(&ost->ost_conn);
 658         if (err) {
 659                 CERROR("lustre ost: fail to disconnect device\n");
 660                 RETURN(-EINVAL);
 661         }
 662
 663         ldlm_namespace_free(obddev->obd_namespace);
 664
 665         MOD_DEC_USE_COUNT;
 666         RETURN(0);
 667 }
 668
 669 /* use obd ops to offer management infrastructure */
 670 static struct obd_ops ost_obd_ops = {
 671         o_setup:       ost_setup,
 672         o_cleanup:     ost_cleanup,
 673 };
 674
 675 static int __init ost_init(void)
 676 {
 677         obd_register_type(&ost_obd_ops, LUSTRE_OST_NAME);
 678         return 0;
 679 }
 680
 681 static void __exit ost_exit(void)
 682 {
 683         obd_unregister_type(LUSTRE_OST_NAME);
 684 }
 685
 686 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
 687 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
 688 MODULE_LICENSE("GPL");
 689
 690 module_init(ost_init);
 691 module_exit(ost_exit);