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         RETURN(0);
  69 }
  70
  71 static int ost_getattr(struct ost_obd *ost, struct ptlrpc_request *req)
  72 {
  73         struct obd_conn conn;
  74         int rc;
  75
  76         ENTRY;
  77
  78         conn.oc_id = req->rq_req.ost->connid;
  79         conn.oc_dev = ost->ost_tgt;
  80
  81         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
  82                           &req->rq_replen, &req->rq_repbuf);
  83         if (rc) {
  84                 CERROR("cannot pack reply\n");
  85                 RETURN(rc);
  86         }
  87         req->rq_rep.ost->oa.o_id = req->rq_req.ost->oa.o_id;
  88         req->rq_rep.ost->oa.o_valid = req->rq_req.ost->oa.o_valid;
  89
  90         req->rq_rep.ost->result =  obd_getattr(&conn, &req->rq_rep.ost->oa);
  91
  92         RETURN(0);
  93 }
  94
  95 static int ost_open(struct ost_obd *ost, struct ptlrpc_request *req)
  96 {
  97         struct obd_conn conn;
  98         int rc;
  99
 100         ENTRY;
 101
 102         conn.oc_id = req->rq_req.ost->connid;
 103         conn.oc_dev = ost->ost_tgt;
 104
 105         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 106                           &req->rq_replen, &req->rq_repbuf);
 107         if (rc) {
 108                 CERROR("cannot pack reply\n");
 109                 RETURN(rc);
 110         }
 111         req->rq_rep.ost->oa.o_id = req->rq_req.ost->oa.o_id;
 112         req->rq_rep.ost->oa.o_valid = req->rq_req.ost->oa.o_valid;
 113
 114         req->rq_rep.ost->result =  obd_open(&conn, &req->rq_rep.ost->oa);
 115
 116         RETURN(0);
 117 }
 118
 119 static int ost_close(struct ost_obd *ost, struct ptlrpc_request *req)
 120 {
 121         struct obd_conn conn;
 122         int rc;
 123
 124         ENTRY;
 125
 126         conn.oc_id = req->rq_req.ost->connid;
 127         conn.oc_dev = ost->ost_tgt;
 128
 129         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 130                           &req->rq_replen, &req->rq_repbuf);
 131         if (rc) {
 132                 CERROR("cannot pack reply\n");
 133                 RETURN(rc);
 134         }
 135         req->rq_rep.ost->oa.o_id = req->rq_req.ost->oa.o_id;
 136         req->rq_rep.ost->oa.o_valid = req->rq_req.ost->oa.o_valid;
 137
 138         req->rq_rep.ost->result =  obd_close(&conn, &req->rq_rep.ost->oa);
 139
 140         RETURN(0);
 141 }
 142
 143
 144 static int ost_create(struct ost_obd *ost, struct ptlrpc_request *req)
 145 {
 146         struct obd_conn conn;
 147         int rc;
 148
 149         ENTRY;
 150
 151         conn.oc_id = req->rq_req.ost->connid;
 152         conn.oc_dev = ost->ost_tgt;
 153
 154         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 155                           &req->rq_replen, &req->rq_repbuf);
 156         if (rc) {
 157                 CERROR("cannot pack reply\n");
 158                 RETURN(rc);
 159         }
 160
 161         memcpy(&req->rq_rep.ost->oa, &req->rq_req.ost->oa,
 162                sizeof(req->rq_req.ost->oa));
 163
 164         req->rq_rep.ost->result =obd_create(&conn, &req->rq_rep.ost->oa);
 165
 166         RETURN(0);
 167 }
 168
 169 static int ost_punch(struct ost_obd *ost, struct ptlrpc_request *req)
 170 {
 171         struct obd_conn conn;
 172         int rc;
 173
 174         ENTRY;
 175
 176         conn.oc_id = req->rq_req.ost->connid;
 177         conn.oc_dev = ost->ost_tgt;
 178
 179         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 180                           &req->rq_replen, &req->rq_repbuf);
 181         if (rc) {
 182                 CERROR("cannot pack reply\n");
 183                 RETURN(rc);
 184         }
 185
 186         memcpy(&req->rq_rep.ost->oa, &req->rq_req.ost->oa,
 187                sizeof(req->rq_req.ost->oa));
 188
 189         req->rq_rep.ost->result = obd_punch(&conn, &req->rq_rep.ost->oa,
 190                                             req->rq_rep.ost->oa.o_size,
 191                                             req->rq_rep.ost->oa.o_blocks);
 192
 193         RETURN(0);
 194 }
 195
 196
 197 static int ost_setattr(struct ost_obd *ost, struct ptlrpc_request *req)
 198 {
 199         struct obd_conn conn;
 200         int rc;
 201
 202         ENTRY;
 203
 204         conn.oc_id = req->rq_req.ost->connid;
 205         conn.oc_dev = ost->ost_tgt;
 206
 207         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 208                           &req->rq_replen, &req->rq_repbuf);
 209         if (rc) {
 210                 CERROR("cannot pack reply\n");
 211                 RETURN(rc);
 212         }
 213
 214         memcpy(&req->rq_rep.ost->oa, &req->rq_req.ost->oa,
 215                sizeof(req->rq_req.ost->oa));
 216
 217         req->rq_rep.ost->result = obd_setattr(&conn, &req->rq_rep.ost->oa);
 218
 219         RETURN(0);
 220 }
 221
 222 static int ost_connect(struct ost_obd *ost, struct ptlrpc_request *req)
 223 {
 224         struct obd_conn conn;
 225         int rc;
 226
 227         ENTRY;
 228
 229         conn.oc_dev = ost->ost_tgt;
 230
 231         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 232                           &req->rq_replen, &req->rq_repbuf);
 233         if (rc) {
 234                 CERROR("cannot pack reply\n");
 235                 RETURN(rc);
 236         }
 237
 238         req->rq_rep.ost->result = obd_connect(&conn);
 239
 240         CDEBUG(D_IOCTL, "rep buffer %p, id %d\n", req->rq_repbuf, conn.oc_id);
 241         req->rq_rep.ost->connid = conn.oc_id;
 242         RETURN(0);
 243 }
 244
 245 static int ost_disconnect(struct ost_obd *ost, struct ptlrpc_request *req)
 246 {
 247         struct obd_conn conn;
 248         int rc;
 249
 250         ENTRY;
 251
 252         conn.oc_dev = ost->ost_tgt;
 253         conn.oc_id = req->rq_req.ost->connid;
 254
 255         rc = ost_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
 256                           &req->rq_replen, &req->rq_repbuf);
 257         if (rc) {
 258                 CERROR("cannot pack reply\n");
 259                 RETURN(rc);
 260         }
 261         CDEBUG(D_IOCTL, "Disconnecting %d\n", conn.oc_id);
 262         req->rq_rep.ost->result = obd_disconnect(&conn);
 263
 264         RETURN(0);
 265 }
 266
 267 static int ost_get_info(struct ost_obd *ost, struct ptlrpc_request *req)
 268 {
 269         struct obd_conn conn;
 270         int rc;
 271         int vallen;
 272         void *val;
 273         char *ptr;
 274
 275         ENTRY;
 276
 277         conn.oc_id = req->rq_req.ost->connid;
 278         conn.oc_dev = ost->ost_tgt;
 279
 280         ptr = ost_req_buf1(req->rq_req.ost);
 281         req->rq_rep.ost->result = obd_get_info(&conn, req->rq_req.ost->buflen1,
 282                                                ptr, &vallen, &val);
 283
 284         rc = ost_pack_rep(val, vallen, NULL, 0, &req->rq_rephdr,
 285                           &req->rq_rep, &req->rq_replen, &req->rq_repbuf);
 286         if (rc)
 287                 CERROR("cannot pack reply\n");
 288
 289         RETURN(rc);
 290 }
 291
 292 static int ost_brw_read(struct ost_obd *obddev, struct ptlrpc_request *req)
 293 {
 294         struct ptlrpc_bulk_desc **bulk_vec = NULL;
 295         struct ptlrpc_bulk_desc *bulk = NULL;
 296         struct obd_conn conn;
 297         int rc;
 298         int i, j;
 299         int objcount, niocount;
 300         char *tmp1, *tmp2, *end2;
 301         char *res = NULL;
 302         int cmd;
 303         struct niobuf *nb, *src, *dst;
 304         struct obd_ioobj *ioo;
 305         struct ost_req *r = req->rq_req.ost;
 306
 307         ENTRY;
 308
 309         tmp1 = ost_req_buf1(r);
 310         tmp2 = ost_req_buf2(r);
 311         end2 = tmp2 + req->rq_req.ost->buflen2;
 312         objcount = r->buflen1 / sizeof(*ioo);
 313         niocount = r->buflen2 / sizeof(*nb);
 314         cmd = r->cmd;
 315
 316         conn.oc_id = req->rq_req.ost->connid;
 317         conn.oc_dev = req->rq_obd->u.ost.ost_tgt;
 318
 319         for (i = 0; i < objcount; i++) {
 320                 ost_unpack_ioo((void *)&tmp1, &ioo);
 321                 if (tmp2 + ioo->ioo_bufcnt > end2) {
 322                         BUG();
 323                         rc = -EFAULT;
 324                         break;
 325                 }
 326                 for (j = 0; j < ioo->ioo_bufcnt; j++)
 327                         ost_unpack_niobuf((void *)&tmp2, &nb);
 328         }
 329
 330         rc = ost_pack_rep(NULL, 0, NULL, 0,
 331                           &req->rq_rephdr, &req->rq_rep,
 332                           &req->rq_replen, &req->rq_repbuf);
 333         if (rc) {
 334                 CERROR("cannot pack reply\n");
 335                 RETURN(rc);
 336         }
 337         OBD_ALLOC(res, sizeof(struct niobuf) * niocount);
 338         if (res == NULL)
 339                 RETURN(-ENOMEM);
 340
 341         /* The unpackers move tmp1 and tmp2, so reset them before using */
 342         tmp1 = ost_req_buf1(r);
 343         tmp2 = ost_req_buf2(r);
 344         req->rq_rep.ost->result = obd_preprw
 345                 (cmd, &conn, objcount, (struct obd_ioobj *)tmp1,
 346                  niocount, (struct niobuf *)tmp2, (struct niobuf *)res);
 347
 348         if (req->rq_rep.ost->result)
 349                 GOTO(out, 0);
 350
 351         for (i = 0; i < niocount; i++) {
 352                 bulk = ptlrpc_prep_bulk(&req->rq_peer);
 353                 if (bulk == NULL) {
 354                         CERROR("cannot alloc bulk desc\n");
 355                         rc = -ENOMEM;
 356                         GOTO(out, rc);
 357                 }
 358
 359                 src = &((struct niobuf *)res)[i];
 360                 dst = &((struct niobuf *)tmp2)[i];
 361                 bulk->b_xid = dst->xid;
 362                 bulk->b_buf = (void *)(unsigned long)src->addr;
 363                 bulk->b_buflen = PAGE_SIZE;
 364                 rc = ptlrpc_send_bulk(bulk, OST_BULK_PORTAL);
 365                 if (rc)
 366                         GOTO(out, rc);
 367                 wait_event_interruptible(bulk->b_waitq,
 368                                          ptlrpc_check_bulk_sent(bulk));
 369
 370                 if (bulk->b_flags == PTL_RPC_INTR)
 371                         GOTO(out, 0);
 372
 373                 OBD_FREE(bulk, sizeof(*bulk));
 374                 bulk = NULL;
 375         }
 376
 377 #if 0
 378         /* Local delivery */
 379         dst = &((struct niobuf *)tmp2)[i];
 380         memcpy((void *)(unsigned long)dst->addr,
 381                (void *)(unsigned long)src->addr, PAGE_SIZE);
 382 #endif
 383         barrier();
 384
 385         /* The unpackers move tmp1 and tmp2, so reset them before using */
 386         tmp1 = ost_req_buf1(r);
 387         tmp2 = ost_req_buf2(r);
 388         req->rq_rep.ost->result = obd_commitrw
 389                 (cmd, &conn, objcount, (struct obd_ioobj *)tmp1,
 390                  niocount, (struct niobuf *)res);
 391
 392         EXIT;
 393  out:
 394         if (res != NULL)
 395                 OBD_FREE(res, sizeof(struct niobuf) * niocount);
 396         if (bulk != NULL)
 397                 OBD_FREE(bulk, sizeof(*bulk));
 398         if (bulk_vec != NULL) {
 399                 for (i = 0; i < niocount; i++) {
 400                         if (bulk_vec[i] != NULL)
 401                                 OBD_FREE(bulk_vec[i], sizeof(*bulk));
 402                 }
 403                 OBD_FREE(bulk_vec,
 404                          niocount * sizeof(struct ptlrpc_bulk_desc *));
 405         }
 406
 407         return 0;
 408 }
 409
 410 static int ost_commit_page(struct obd_conn *conn, struct page *page)
 411 {
 412         struct obd_ioobj obj;
 413         struct niobuf buf;
 414         int rc;
 415         ENTRY;
 416
 417         memset(&buf, 0, sizeof(buf));
 418         memset(&obj, 0, sizeof(obj));
 419
 420         buf.page = page;
 421         obj.ioo_bufcnt = 1;
 422
 423         rc = obd_commitrw(OBD_BRW_WRITE, conn, 1, &obj, 1, &buf);
 424         RETURN(rc);
 425 }
 426
 427 static int ost_brw_write_cb(struct ptlrpc_bulk_desc *bulk, void *data)
 428 {
 429         int rc;
 430
 431         ENTRY;
 432
 433         rc = ost_commit_page(&bulk->b_conn, bulk->b_page);
 434         if (rc)
 435                 CERROR("ost_commit_page failed: %d\n", rc);
 436
 437         RETURN(rc);
 438 }
 439
 440 int ost_brw_write(struct ost_obd *obddev, struct ptlrpc_request *req)
 441 {
 442         struct obd_conn conn;
 443         int rc;
 444         int i, j;
 445         int objcount, niocount;
 446         char *tmp1, *tmp2, *end2;
 447         char *res;
 448         int cmd;
 449         struct niobuf *nb, *dst;
 450         struct obd_ioobj *ioo;
 451         struct ost_req *r = req->rq_req.ost;
 452
 453         ENTRY;
 454
 455         tmp1 = ost_req_buf1(r);
 456         tmp2 = ost_req_buf2(r);
 457         end2 = tmp2 + req->rq_req.ost->buflen2;
 458         objcount = r->buflen1 / sizeof(*ioo);
 459         niocount = r->buflen2 / sizeof(*nb);
 460         cmd = r->cmd;
 461
 462         conn.oc_id = req->rq_req.ost->connid;
 463         conn.oc_dev = req->rq_obd->u.ost.ost_tgt;
 464
 465         for (i = 0; i < objcount; i++) {
 466                 ost_unpack_ioo((void *)&tmp1, &ioo);
 467                 if (tmp2 + ioo->ioo_bufcnt > end2) {
 468                         rc = -EFAULT;
 469                         break;
 470                 }
 471                 for (j = 0; j < ioo->ioo_bufcnt; j++)
 472                         ost_unpack_niobuf((void *)&tmp2, &nb);
 473         }
 474
 475         rc = ost_pack_rep(NULL, 0, NULL, niocount * sizeof(*nb),
 476                           &req->rq_rephdr, &req->rq_rep,
 477                           &req->rq_replen, &req->rq_repbuf);
 478         if (rc) {
 479                 CERROR("cannot pack reply\n");
 480                 RETURN(rc);
 481         }
 482         res = ost_rep_buf2(req->rq_rep.ost);
 483
 484         /* The unpackers move tmp1 and tmp2, so reset them before using */
 485         tmp1 = ost_req_buf1(r);
 486         tmp2 = ost_req_buf2(r);
 487         req->rq_rep.ost->result = obd_preprw
 488                 (cmd, &conn, objcount, (struct obd_ioobj *)tmp1,
 489                  niocount, (struct niobuf *)tmp2, (struct niobuf *)res);
 490
 491         if (req->rq_rep.ost->result)
 492                 GOTO(out, 0);
 493
 494         for (i = 0; i < niocount; i++) {
 495                 struct ptlrpc_bulk_desc *bulk;
 496                 struct ptlrpc_service *srv = req->rq_obd->u.ost.ost_service;
 497
 498                 bulk = ptlrpc_prep_bulk(&req->rq_peer);
 499                 if (bulk == NULL) {
 500                         CERROR("cannot alloc bulk desc\n");
 501                         rc = -ENOMEM;
 502                         GOTO(out, rc);
 503                 }
 504
 505                 spin_lock(&srv->srv_lock);
 506                 bulk->b_xid = srv->srv_xid++;
 507                 spin_unlock(&srv->srv_lock);
 508
 509                 dst = &((struct niobuf *)res)[i];
 510                 dst->xid = HTON__u32(bulk->b_xid);
 511
 512                 bulk->b_buf = (void *)(unsigned long)dst->addr;
 513                 bulk->b_cb = ost_brw_write_cb;
 514                 bulk->b_page = dst->page;
 515                 memcpy(&(bulk->b_conn), &conn, sizeof(conn));
 516                 bulk->b_buflen = PAGE_SIZE;
 517                 bulk->b_portal = OSC_BULK_PORTAL;
 518                 rc = ptlrpc_register_bulk(bulk);
 519                 if (rc)
 520                         GOTO(out, rc);
 521
 522 #if 0
 523                 /* Local delivery */
 524                 src = &((struct niobuf *)tmp2)[i];
 525                 memcpy((void *)(unsigned long)dst->addr,
 526                        (void *)(unsigned long)src->addr, src->len);
 527 #endif
 528         }
 529         barrier();
 530
 531         EXIT;
 532  out:
 533         /* FIXME: should we return 'rc' here? */
 534         return 0;
 535 }
 536
 537 int ost_brw(struct ost_obd *obddev, struct ptlrpc_request *req)
 538 {
 539         struct ost_req *r = req->rq_req.ost;
 540         int cmd = r->cmd;
 541
 542         if (cmd == OBD_BRW_READ)
 543                 return ost_brw_read(obddev, req);
 544         else
 545                 return ost_brw_write(obddev, req);
 546 }
 547
 548 static int ost_handle(struct obd_device *obddev, struct ptlrpc_service *svc,
 549                       struct ptlrpc_request *req)
 550 {
 551         int rc;
 552         struct ost_obd *ost = &obddev->u.ost;
 553         struct ptlreq_hdr *hdr;
 554
 555         ENTRY;
 556
 557         hdr = (struct ptlreq_hdr *)req->rq_reqbuf;
 558         if (NTOH__u32(hdr->type) != OST_TYPE_REQ) {
 559                 CERROR("lustre_ost: wrong packet type sent %d\n",
 560                        NTOH__u32(hdr->type));
 561                 BUG();
 562                 rc = -EINVAL;
 563                 GOTO(out, rc);
 564         }
 565
 566         rc = ost_unpack_req(req->rq_reqbuf, req->rq_reqlen,
 567                             &req->rq_reqhdr, &req->rq_req);
 568         if (rc) {
 569                 CERROR("lustre_ost: Invalid request\n");
 570                 GOTO(out, rc);
 571         }
 572
 573         switch (req->rq_reqhdr->opc) {
 574
 575         case OST_CONNECT:
 576                 CDEBUG(D_INODE, "connect\n");
 577                 OBD_CHECK_DROP_PACKET(req, OBD_INST_OST_CONNECT);
 578                 rc = ost_connect(ost, req);
 579                 break;
 580         case OST_DISCONNECT:
 581                 CDEBUG(D_INODE, "disconnect\n");
 582                 OBD_CHECK_DROP_PACKET(req, OBD_INST_OST_DISCONNECT);
 583                 rc = ost_disconnect(ost, req);
 584                 break;
 585         case OST_GET_INFO:
 586                 CDEBUG(D_INODE, "get_info\n");
 587                 OBD_CHECK_DROP_PACKET(req, OBD_INST_OST_GET_INFO);
 588                 rc = ost_get_info(ost, req);
 589                 break;
 590         case OST_CREATE:
 591                 CDEBUG(D_INODE, "create\n");
 592                 OBD_CHECK_DROP_PACKET(req, OBD_INST_OST_CREATE);
 593                 rc = ost_create(ost, req);
 594                 break;
 595         case OST_DESTROY:
 596                 CDEBUG(D_INODE, "destroy\n");
 597                 OBD_CHECK_DROP_PACKET(req, OBD_INST_OST_DESTROY);
 598                 rc = ost_destroy(ost, req);
 599                 break;
 600         case OST_GETATTR:
 601                 CDEBUG(D_INODE, "getattr\n");
 602                 OBD_CHECK_DROP_PACKET(req, OBD_INST_OST_GETATTR);
 603                 rc = ost_getattr(ost, req);
 604                 break;
 605         case OST_SETATTR:
 606                 CDEBUG(D_INODE, "setattr\n");
 607                 OBD_CHECK_DROP_PACKET(req, OBD_INST_OST_SETATTR);
 608                 rc = ost_setattr(ost, req);
 609                 break;
 610         case OST_OPEN:
 611                 CDEBUG(D_INODE, "setattr\n");
 612                 OBD_CHECK_DROP_PACKET(req, OBD_INST_OST_OPEN);
 613                 rc = ost_open(ost, req);
 614                 break;
 615         case OST_CLOSE:
 616                 CDEBUG(D_INODE, "setattr\n");
 617                 OBD_CHECK_DROP_PACKET(req, OBD_INST_OST_CLOSE);
 618                 rc = ost_close(ost, req);
 619                 break;
 620         case OST_BRW:
 621                 CDEBUG(D_INODE, "brw\n");
 622                 OBD_CHECK_DROP_PACKET(req, OBD_INST_OST_BRW);
 623                 rc = ost_brw(ost, req);
 624                 break;
 625         case OST_PUNCH:
 626                 CDEBUG(D_INODE, "punch\n");
 627                 OBD_CHECK_DROP_PACKET(req, OBD_INST_OST_PUNCH);
 628                 rc = ost_punch(ost, req);
 629                 break;
 630         default:
 631                 req->rq_status = -ENOTSUPP;
 632                 rc = ptlrpc_error(obddev, svc, req);
 633                 RETURN(rc);
 634         }
 635
 636         EXIT;
 637 out:
 638         req->rq_status = rc;
 639         if (rc) {
 640                 CERROR("ost: processing error %d\n", rc);
 641                 ptlrpc_error(obddev, svc, req);
 642         } else {
 643                 CDEBUG(D_INODE, "sending reply\n");
 644                 ptlrpc_reply(obddev, svc, req);
 645         }
 646
 647         return 0;
 648 }
 649
 650
 651 /* mount the file system (secretly) */
 652 static int ost_setup(struct obd_device *obddev, obd_count len,
 653                         void *buf)
 654
 655 {
 656         struct obd_ioctl_data* data = buf;
 657         struct ost_obd *ost = &obddev->u.ost;
 658         struct obd_device *tgt;
 659         int err;
 660         ENTRY;
 661
 662         if (data->ioc_dev  < 0 || data->ioc_dev > MAX_OBD_DEVICES)
 663                 RETURN(-ENODEV);
 664
 665         tgt = &obd_dev[data->ioc_dev];
 666         ost->ost_tgt = tgt;
 667         if ( ! (tgt->obd_flags & OBD_ATTACHED) ||
 668              ! (tgt->obd_flags & OBD_SET_UP) ){
 669                 CERROR("device not attached or not set up (%d)\n",
 670                        data->ioc_dev);
 671                 RETURN(-EINVAL);
 672         }
 673
 674         ost->ost_conn.oc_dev = tgt;
 675         err = obd_connect(&ost->ost_conn);
 676         if (err) {
 677                 CERROR("fail to connect to device %d\n", data->ioc_dev);
 678                 RETURN(-EINVAL);
 679         }
 680
 681         ost->ost_service = ptlrpc_init_svc( 2 * 1024,
 682                                             OST_REQUEST_PORTAL,
 683                                             OSC_REPLY_PORTAL,
 684                                             "self",
 685                                             ost_unpack_req,
 686                                             ost_pack_rep,
 687                                             ost_handle);
 688         if (!ost->ost_service) {
 689                 obd_disconnect(&ost->ost_conn);
 690                 RETURN(-EINVAL);
 691         }
 692
 693         rpc_register_service(ost->ost_service, "self");
 694
 695         err = ptlrpc_start_thread(obddev, ost->ost_service, "lustre_ost");
 696         if (err) {
 697                 obd_disconnect(&ost->ost_conn);
 698                 RETURN(-EINVAL);
 699         }
 700
 701         MOD_INC_USE_COUNT;
 702         RETURN(0);
 703 }
 704
 705 static int ost_cleanup(struct obd_device * obddev)
 706 {
 707         struct ost_obd *ost = &obddev->u.ost;
 708         int err;
 709
 710         ENTRY;
 711
 712         if ( !list_empty(&obddev->obd_gen_clients) ) {
 713                 CERROR("still has clients!\n");
 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         RETURN(0);
 734 }
 735
 736 /* use obd ops to offer management infrastructure */
 737 static struct obd_ops ost_obd_ops = {
 738         o_setup:       ost_setup,
 739         o_cleanup:     ost_cleanup,
 740 };
 741
 742 static int __init ost_init(void)
 743 {
 744         obd_register_type(&ost_obd_ops, LUSTRE_OST_NAME);
 745         return 0;
 746 }
 747
 748 static void __exit ost_exit(void)
 749 {
 750         obd_unregister_type(LUSTRE_OST_NAME);
 751 }
 752
 753 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
 754 MODULE_DESCRIPTION("Lustre Object Storage Target (OST) v0.01");
 755 MODULE_LICENSE("GPL");
 756
 757 module_init(ost_init);
 758 module_exit(ost_exit);