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_export *export;
 178         struct obd_conn conn;
 179         char *uuid;
 180         int rc, size = sizeof(*body), i;
 181         ENTRY;
 182
 183         uuid = lustre_msg_buf(req->rq_reqmsg, 0);
 184         if (req->rq_reqmsg->buflens[0] > 37) {
 185                 /* Invalid UUID */
 186                 req->rq_status = -EINVAL;
 187                 RETURN(0);
 188         }
 189
 190         i = obd_class_uuid2dev(uuid);
 191         if (i == -1) {
 192                 req->rq_status = -ENODEV;
 193                 RETURN(0);
 194         }
 195
 196         target = &obd_dev[i];
 197         if (!target) {
 198                 req->rq_status = -ENODEV;
 199                 RETURN(0);
 200         }
 201
 202         conn.addr = req->rq_reqmsg->addr;
 203         conn.cookie = req->rq_reqmsg->cookie;
 204
 205         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 206         if (rc)
 207                 RETURN(rc);
 208
 209         req->rq_status = obd_connect(&conn, target);
 210         req->rq_repmsg->addr = conn.addr;
 211         req->rq_repmsg->cookie = conn.cookie;
 212
 213         export = gen_client(&conn);
 214         if (!export)
 215                 LBUG();
 216
 217         req->rq_export = export;
 218         export->export_connection = req->rq_connection;
 219         CDEBUG(D_IOCTL, "rep buffer %p, id %d\n", req->rq_repmsg, conn.oc_id);
 220         body = lustre_msg_buf(req->rq_repmsg, 0);
 221         body->connid = conn.oc_id;
 222         RETURN(0);
 223 }
 224
 225 static int ost_disconnect(struct ptlrpc_request *req)
 226 {
 227         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
 228         struct ost_body *body;
 229         int rc;
 230         ENTRY;
 231
 232         body = lustre_msg_buf(req->rq_reqmsg, 0);
 233
 234         rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
 235         if (rc)
 236                 RETURN(rc);
 237
 238         req->rq_status = obd_disconnect(conn);
 239         RETURN(0);
 240 }
 241
 242 static int ost_get_info(struct ptlrpc_request *req)
 243 {
 244         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
 245         struct ost_body *body;
 246         int rc, size[2] = {sizeof(*body)};
 247         char *bufs[2] = {NULL, NULL}, *ptr;
 248         ENTRY;
 249
 250         body = lustre_msg_buf(req->rq_reqmsg, 0);
 251
 252         ptr = lustre_msg_buf(req->rq_reqmsg, 1);
 253         if (!ptr)
 254                 RETURN(-EINVAL);
 255
 256         req->rq_status = obd_get_info(conn, req->rq_reqmsg->buflens[1], ptr,
 257                                       &(size[1]), (void **)&(bufs[1]));
 258
 259         rc = lustre_pack_msg(2, size, bufs, &req->rq_replen, &req->rq_repmsg);
 260         if (rc)
 261                 CERROR("cannot pack reply\n");
 262
 263         RETURN(rc);
 264 }
 265
 266 static int ost_brw_read(struct ptlrpc_request *req)
 267 {
 268         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
 269         struct ptlrpc_bulk_desc *desc;
 270         void *tmp1, *tmp2, *end2;
 271         struct niobuf_remote *remote_nb;
 272         struct niobuf_local *local_nb = NULL;
 273         struct obd_ioobj *ioo;
 274         struct ost_body *body;
 275         int rc, cmd, i, j, objcount, niocount, size = sizeof(*body);
 276         ENTRY;
 277
 278         body = lustre_msg_buf(req->rq_reqmsg, 0);
 279         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 280         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 281         end2 = (char *)tmp2 + req->rq_reqmsg->buflens[2];
 282         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 283         niocount = req->rq_reqmsg->buflens[2] / sizeof(*remote_nb);
 284         cmd = body->data;
 285
 286         for (i = 0; i < objcount; i++) {
 287                 ost_unpack_ioo(&tmp1, &ioo);
 288                 if (tmp2 + ioo->ioo_bufcnt > end2) {
 289                         LBUG();
 290                         GOTO(out, rc = -EFAULT);
 291                 }
 292                 for (j = 0; j < ioo->ioo_bufcnt; j++)
 293                         ost_unpack_niobuf(&tmp2, &remote_nb);
 294         }
 295
 296         rc = lustre_pack_msg(1, &size, NULL, &req->rq_replen, &req->rq_repmsg);
 297         if (rc)
 298                 RETURN(rc);
 299         OBD_ALLOC(local_nb, sizeof(*local_nb) * niocount);
 300         if (local_nb == NULL)
 301                 RETURN(-ENOMEM);
 302
 303         /* The unpackers move tmp1 and tmp2, so reset them before using */
 304         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 305         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 306         req->rq_status = obd_preprw(cmd, conn, objcount,
 307                                     tmp1, niocount, tmp2, local_nb, NULL);
 308
 309         if (req->rq_status)
 310                 GOTO(out_local, 0);
 311
 312         desc = ptlrpc_prep_bulk(req->rq_connection);
 313         if (desc == NULL)
 314                 GOTO(out_local, rc = -ENOMEM);
 315         desc->b_portal = OST_BULK_PORTAL;
 316
 317         for (i = 0; i < niocount; i++) {
 318                 struct ptlrpc_bulk_page *bulk;
 319                 bulk = ptlrpc_prep_bulk_page(desc);
 320                 if (bulk == NULL)
 321                         GOTO(out_bulk, rc = -ENOMEM);
 322                 remote_nb = &(((struct niobuf_remote *)tmp2)[i]);
 323                 bulk->b_xid = remote_nb->xid;
 324                 bulk->b_buf = (void *)(unsigned long)local_nb[i].addr;
 325                 bulk->b_buflen = PAGE_SIZE;
 326         }
 327
 328         rc = ptlrpc_send_bulk(desc);
 329         if (rc)
 330                 GOTO(out_bulk, rc);
 331
 332         wait_event_interruptible(desc->b_waitq, ptlrpc_check_bulk_sent(desc));
 333         if (desc->b_flags & PTL_RPC_FL_INTR)
 334                 rc = -EINTR;
 335
 336         /* The unpackers move tmp1 and tmp2, so reset them before using */
 337         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 338         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 339         req->rq_status = obd_commitrw(cmd, conn, objcount,
 340                                       tmp1, niocount, local_nb, NULL);
 341
 342 out_bulk:
 343         ptlrpc_free_bulk(desc);
 344 out_local:
 345         OBD_FREE(local_nb, sizeof(*local_nb) * niocount);
 346 out:
 347         if (rc)
 348                 ptlrpc_error(req->rq_svc, req);
 349         else
 350                 ptlrpc_reply(req->rq_svc, req);
 351         RETURN(rc);
 352 }
 353
 354 static int ost_brw_write(struct ptlrpc_request *req)
 355 {
 356         struct obd_conn *conn = (struct obd_conn *)req->rq_reqmsg;
 357         struct ptlrpc_bulk_desc *desc;
 358         struct niobuf_remote *remote_nb;
 359         struct niobuf_local *local_nb, *lnb;
 360         struct obd_ioobj *ioo;
 361         struct ost_body *body;
 362         int cmd, rc, i, j, objcount, niocount, size[2] = {sizeof(*body)};
 363         void *tmp1, *tmp2, *end2;
 364         void *desc_priv = NULL;
 365         int reply_sent = 0;
 366         ENTRY;
 367
 368         body = lustre_msg_buf(req->rq_reqmsg, 0);
 369         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 370         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 371         end2 = (char *)tmp2 + req->rq_reqmsg->buflens[2];
 372         objcount = req->rq_reqmsg->buflens[1] / sizeof(*ioo);
 373         niocount = req->rq_reqmsg->buflens[2] / sizeof(*remote_nb);
 374         cmd = body->data;
 375
 376         for (i = 0; i < objcount; i++) {
 377                 ost_unpack_ioo((void *)&tmp1, &ioo);
 378                 if (tmp2 + ioo->ioo_bufcnt > end2) {
 379                         rc = -EFAULT;
 380                         break;
 381                 }
 382                 for (j = 0; j < ioo->ioo_bufcnt; j++)
 383                         ost_unpack_niobuf((void *)&tmp2, &remote_nb);
 384         }
 385
 386         size[1] = niocount * sizeof(*remote_nb);
 387         rc = lustre_pack_msg(2, size, NULL, &req->rq_replen, &req->rq_repmsg);
 388         if (rc)
 389                 GOTO(out, rc);
 390         remote_nb = lustre_msg_buf(req->rq_repmsg, 1);
 391
 392         OBD_ALLOC(local_nb, niocount * sizeof(*local_nb));
 393         if (local_nb == NULL)
 394                 GOTO(out, rc = -ENOMEM);
 395
 396         /* The unpackers move tmp1 and tmp2, so reset them before using */
 397         tmp1 = lustre_msg_buf(req->rq_reqmsg, 1);
 398         tmp2 = lustre_msg_buf(req->rq_reqmsg, 2);
 399         req->rq_status = obd_preprw(cmd, conn, objcount,
 400                                     tmp1, niocount, tmp2, local_nb, &desc_priv);
 401         if (req->rq_status)
 402                 GOTO(out_free, rc = 0); /* XXX is this correct? */
 403
 404         desc = ptlrpc_prep_bulk(req->rq_connection);
 405         if (desc == NULL)
 406                 GOTO(fail_preprw, rc = -ENOMEM);
 407         desc->b_cb = NULL;
 408         desc->b_portal = OSC_BULK_PORTAL;
 409         desc->b_desc_private = desc_priv;
 410         memcpy(&(desc->b_conn), &conn, sizeof(conn));
 411
 412         for (i = 0, lnb = local_nb; i < niocount; i++, lnb++) {
 413                 struct ptlrpc_service *srv = req->rq_obd->u.ost.ost_service;
 414                 struct ptlrpc_bulk_page *bulk;
 415
 416                 bulk = ptlrpc_prep_bulk_page(desc);
 417                 if (bulk == NULL)
 418                         GOTO(fail_bulk, rc = -ENOMEM);
 419
 420                 spin_lock(&srv->srv_lock);
 421                 bulk->b_xid = srv->srv_xid++;
 422                 spin_unlock(&srv->srv_lock);
 423
 424                 bulk->b_buf = lnb->addr;
 425                 bulk->b_page = lnb->page;
 426                 bulk->b_flags = lnb->flags;
 427                 bulk->b_dentry = lnb->dentry;
 428                 bulk->b_buflen = PAGE_SIZE;
 429                 bulk->b_cb = NULL;
 430
 431                 /* this advances remote_nb */
 432                 ost_pack_niobuf((void **)&remote_nb, lnb->offset, lnb->len, 0,
 433                                 bulk->b_xid);
 434         }
 435
 436         rc = ptlrpc_register_bulk(desc);
 437         if (rc)
 438                 GOTO(fail_bulk, rc);
 439
 440         reply_sent = 1;
 441         ptlrpc_reply(req->rq_svc, req);
 442
 443         wait_event_interruptible(desc->b_waitq,
 444                                  desc->b_flags & PTL_BULK_FL_RCVD);
 445
 446         rc = obd_commitrw(cmd, conn, objcount, tmp1, niocount, local_nb,
 447                           desc->b_desc_private);
 448         ptlrpc_free_bulk(desc);
 449         EXIT;
 450 out_free:
 451         OBD_FREE(local_nb, niocount * sizeof(*local_nb));
 452 out:
 453         if (!reply_sent) {
 454                 if (rc)
 455                         ptlrpc_error(req->rq_svc, req);
 456                 else
 457                         ptlrpc_reply(req->rq_svc, req);
 458         }
 459         return rc;
 460
 461 fail_bulk:
 462         ptlrpc_free_bulk(desc);
 463 fail_preprw:
 464         /* FIXME: how do we undo the preprw? */
 465         goto out_free;
 466 }
 467
 468 static int ost_brw(struct ptlrpc_request *req)
 469 {
 470         struct ost_body *body = lustre_msg_buf(req->rq_reqmsg, 0);
 471
 472         if (body->data & OBD_BRW_WRITE)
 473                 return ost_brw_write(req);
 474         else
 475                 return ost_brw_read(req);
 476 }
 477
 478
 479 static int ost_handle(struct ptlrpc_request *req)
 480 {
 481         int rc;
 482         ENTRY;
 483
 484         rc = lustre_unpack_msg(req->rq_reqmsg, req->rq_reqlen);
 485         if (rc || OBD_FAIL_CHECK(OBD_FAIL_MDS_HANDLE_UNPACK)) {
 486                 CERROR("lustre_mds: Invalid request\n");
 487                 GOTO(out, rc);
 488         }
 489
 490         if (req->rq_reqmsg->type != PTL_RPC_MSG_REQUEST) {
 491                 CERROR("lustre_mds: wrong packet type sent %d\n",
 492                        req->rq_reqmsg->type);
 493                 GOTO(out, rc = -EINVAL);
 494         }
 495
 496         if (req->rq_reqmsg->opc != OST_CONNECT &&
 497             req->rq_export == NULL)
 498                 GOTO(out, rc = -ENOTCONN);
 499
 500         if (strcmp(req->rq_obd->obd_type->typ_name, "ost") != 0)
 501                 GOTO(out, rc = -EINVAL);
 502
 503         switch (req->rq_reqmsg->opc) {
 504         case OST_CONNECT:
 505                 CDEBUG(D_INODE, "connect\n");
 506                 OBD_FAIL_RETURN(OBD_FAIL_OST_CONNECT_NET, 0);
 507                 rc = ost_connect(req);
 508                 break;
 509         case OST_DISCONNECT:
 510                 CDEBUG(D_INODE, "disconnect\n");
 511                 OBD_FAIL_RETURN(OBD_FAIL_OST_DISCONNECT_NET, 0);
 512                 rc = ost_disconnect(req);
 513                 break;
 514         case OST_GET_INFO:
 515                 CDEBUG(D_INODE, "get_info\n");
 516                 OBD_FAIL_RETURN(OBD_FAIL_OST_GET_INFO_NET, 0);
 517                 rc = ost_get_info(req);
 518                 break;
 519         case OST_CREATE:
 520                 CDEBUG(D_INODE, "create\n");
 521                 OBD_FAIL_RETURN(OBD_FAIL_OST_CREATE_NET, 0);
 522                 rc = ost_create(req);
 523                 break;
 524         case OST_DESTROY:
 525                 CDEBUG(D_INODE, "destroy\n");
 526                 OBD_FAIL_RETURN(OBD_FAIL_OST_DESTROY_NET, 0);
 527                 rc = ost_destroy(req);
 528                 break;
 529         case OST_GETATTR:
 530                 CDEBUG(D_INODE, "getattr\n");
 531                 OBD_FAIL_RETURN(OBD_FAIL_OST_GETATTR_NET, 0);
 532                 rc = ost_getattr(req);
 533                 break;
 534         case OST_SETATTR:
 535                 CDEBUG(D_INODE, "setattr\n");
 536                 OBD_FAIL_RETURN(OBD_FAIL_OST_SETATTR_NET, 0);
 537                 rc = ost_setattr(req);
 538                 break;
 539         case OST_OPEN:
 540                 CDEBUG(D_INODE, "setattr\n");
 541                 OBD_FAIL_RETURN(OBD_FAIL_OST_OPEN_NET, 0);
 542                 rc = ost_open(req);
 543                 break;
 544         case OST_CLOSE:
 545                 CDEBUG(D_INODE, "setattr\n");
 546                 OBD_FAIL_RETURN(OBD_FAIL_OST_CLOSE_NET, 0);
 547                 rc = ost_close(req);
 548                 break;
 549         case OST_BRW:
 550                 CDEBUG(D_INODE, "brw\n");
 551                 OBD_FAIL_RETURN(OBD_FAIL_OST_BRW_NET, 0);
 552                 rc = ost_brw(req);
 553                 /* ost_brw sends its own replies */
 554                 RETURN(rc);
 555         case OST_PUNCH:
 556                 CDEBUG(D_INODE, "punch\n");
 557                 OBD_FAIL_RETURN(OBD_FAIL_OST_PUNCH_NET, 0);
 558                 rc = ost_punch(req);
 559                 break;
 560 #if 0
 561         case OST_STATFS:
 562                 CDEBUG(D_INODE, "statfs\n");
 563                 OBD_FAIL_RETURN(OBD_FAIL_OST_STATFS_NET, 0);
 564                 rc = ost_statfs(req);
 565                 break;
 566 #endif
 567         default:
 568                 req->rq_status = -ENOTSUPP;
 569                 rc = ptlrpc_error(req->rq_svc, req);
 570                 RETURN(rc);
 571         }
 572
 573         EXIT;
 574 out:
 575         //req->rq_status = rc;
 576         if (rc) {
 577                 CERROR("ost: processing error %d\n", rc);
 578                 ptlrpc_error(req->rq_svc, req);
 579         } else {
 580                 CDEBUG(D_INODE, "sending reply\n");
 581                 ptlrpc_reply(req->rq_svc, req);
 582         }
 583
 584         return 0;
 585 }
 586
 587 #define OST_NUM_THREADS 6
 588
 589 /* mount the file system (secretly) */
 590 static int ost_setup(struct obd_device *obddev, obd_count len, void *buf)
 591 {
 592         struct obd_ioctl_data* data = buf;
 593         struct ost_obd *ost = &obddev->u.ost;
 594         struct obd_device *tgt;
 595         int err;
 596         int i;
 597         ENTRY;
 598
 599         if (data->ioc_dev < 0 || data->ioc_dev > MAX_OBD_DEVICES)
 600                 RETURN(-ENODEV);
 601
 602         MOD_INC_USE_COUNT;
 603         tgt = &obd_dev[data->ioc_dev];
 604         if (!(tgt->obd_flags & OBD_ATTACHED) ||
 605             !(tgt->obd_flags & OBD_SET_UP)) {
 606                 CERROR("device not attached or not set up (%d)\n",
 607                        data->ioc_dev);
 608                 GOTO(error_dec, err = -EINVAL);
 609         }
 610
 611         err = obd_connect(&ost->ost_conn, tgt);
 612         if (err) {
 613                 CERROR("fail to connect to device %d\n", data->ioc_dev);
 614                 GOTO(error_dec, err = -EINVAL);
 615         }
 616
 617         obddev->obd_namespace =
 618                 ldlm_namespace_new("ost", LDLM_NAMESPACE_SERVER);
 619         if (obddev->obd_namespace == NULL)
 620                 LBUG();
 621
 622         ost->ost_service = ptlrpc_init_svc(64 * 1024, OST_REQUEST_PORTAL,
 623                                            OSC_REPLY_PORTAL, "self",ost_handle);
 624         if (!ost->ost_service) {
 625                 CERROR("failed to start service\n");
 626                 GOTO(error_disc, err = -EINVAL);
 627         }
 628
 629         for (i = 0; i < OST_NUM_THREADS; i++) {
 630                 err = ptlrpc_start_thread(obddev, ost->ost_service,
 631                                           "lustre_ost");
 632                 if (err) {
 633                         CERROR("error starting thread #%d: rc %d\n", i, err);
 634                         GOTO(error_disc, err = -EINVAL);
 635                 }
 636         }
 637
 638         RETURN(0);
 639
 640 error_disc:
 641         obd_disconnect(&ost->ost_conn);
 642 error_dec:
 643         MOD_DEC_USE_COUNT;
 644         RETURN(err);
 645 }
 646
 647 static int ost_cleanup(struct obd_device * obddev)
 648 {
 649         struct ost_obd *ost = &obddev->u.ost;
 650         int err;
 651
 652         ENTRY;
 653
 654         if ( !list_empty(&obddev->obd_exports) ) {
 655                 CERROR("still has clients!\n");
 656                 RETURN(-EBUSY);
 657         }
 658
 659         ptlrpc_stop_all_threads(ost->ost_service);
 660         ptlrpc_unregister_service(ost->ost_service);
 661
 662         err = obd_disconnect(&ost->ost_conn);
 663         if (err) {
 664                 CERROR("lustre ost: fail to disconnect device\n");
 665                 RETURN(-EINVAL);
 666         }
 667
 668         ldlm_namespace_free(obddev->obd_namespace);
 669
 670         MOD_DEC_USE_COUNT;
 671         RETURN(0);
 672 }
 673
 674 /* use obd ops to offer management infrastructure */
 675 static struct obd_ops ost_obd_ops = {
 676         o_setup:       ost_setup,
 677         o_cleanup:     ost_cleanup,
 678 };
 679
 680 static int __init ost_init(void)
 681 {
 682         obd_register_type(&ost_obd_ops, LUSTRE_OST_NAME);
 683         return 0;
 684 }
 685
 686 static void __exit ost_exit(void)
 687 {
 688         obd_unregister_type(LUSTRE_OST_NAME);
 689 }
 690
 691 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
 692 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
 693 MODULE_LICENSE("GPL");
 694
 695 module_init(ost_init);
 696 module_exit(ost_exit);