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