lustre/mdc/mdc_request.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  *
   6  *   This file is part of Lustre, http://www.sf.net/projects/lustre/
   7  *
   8  *   Lustre is free software; you can redistribute it and/or
   9  *   modify it under the terms of version 2 of the GNU General Public
  10  *   License as published by the Free Software Foundation.
  11  *
  12  *   Lustre is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with Lustre; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22
  23 #define EXPORT_SYMTAB
  24 #define DEBUG_SUBSYSTEM S_MDC
  25
  26 #include <linux/module.h>
  27 #include <linux/miscdevice.h>
  28 #include <linux/lustre_mds.h>
  29 #include <linux/lustre_lite.h>
  30 #include <linux/lustre_dlm.h>
  31 #include <linux/init.h>
  32 #include <linux/lprocfs_status.h>
  33
  34 #define REQUEST_MINOR 244
  35
  36 extern int mds_queue_req(struct ptlrpc_request *);
  37 extern struct lprocfs_vars status_var_nm_1[];
  38 extern struct lprocfs_vars status_class_var[];
  39
  40 /* should become mdc_getinfo() */
  41 int mdc_getstatus(struct lustre_handle *conn, struct ll_fid *rootfid)
  42 {
  43         struct ptlrpc_request *req;
  44         struct mds_body *body;
  45         int rc, size = sizeof(*body);
  46         ENTRY;
  47
  48         req = ptlrpc_prep_req(class_conn2cliimp(conn), MDS_GETSTATUS, 1, &size,
  49                               NULL);
  50         if (!req)
  51                 GOTO(out, rc = -ENOMEM);
  52
  53         body = lustre_msg_buf(req->rq_reqmsg, 0);
  54         req->rq_level = LUSTRE_CONN_CON;
  55         req->rq_replen = lustre_msg_size(1, &size);
  56
  57         mds_pack_req_body(req);
  58         rc = ptlrpc_queue_wait(req);
  59         rc = ptlrpc_check_status(req, rc);
  60
  61         if (!rc) {
  62                 body = lustre_msg_buf(req->rq_repmsg, 0);
  63                 mds_unpack_body(body);
  64                 memcpy(rootfid, &body->fid1, sizeof(*rootfid));
  65
  66                 CDEBUG(D_NET, "root ino="LPU64", last_committed="LPU64
  67                        ", last_xid="LPU64"\n",
  68                        rootfid->id, req->rq_repmsg->last_committed,
  69                        req->rq_repmsg->last_xid);
  70         }
  71
  72         EXIT;
  73  out:
  74         ptlrpc_req_finished(req);
  75         return rc;
  76 }
  77
  78 int mdc_getlovinfo(struct obd_device *obd, struct lustre_handle *mdc_connh,
  79                    struct ptlrpc_request **request)
  80 {
  81         struct ptlrpc_request *req;
  82         struct mds_status_req *streq;
  83         int rc, size[2] = {sizeof(*streq)};
  84         ENTRY;
  85
  86         req = ptlrpc_prep_req(class_conn2cliimp(mdc_connh), MDS_GETLOVINFO, 1,
  87                               size, NULL);
  88         if (!req)
  89                 GOTO(out, rc = -ENOMEM);
  90
  91         *request = req;
  92         streq = lustre_msg_buf(req->rq_reqmsg, 0);
  93         streq->flags = HTON__u32(MDS_STATUS_LOV);
  94         streq->repbuf = HTON__u32(8192);
  95
  96         /* prepare for reply */
  97         req->rq_level = LUSTRE_CONN_CON;
  98         size[0] = 512;
  99         size[1] = 8192;
 100         req->rq_replen = lustre_msg_size(2, size);
 101
 102         rc = ptlrpc_queue_wait(req);
 103         rc = ptlrpc_check_status(req, rc);
 104
 105  out:
 106         RETURN(rc);
 107 }
 108
 109
 110 int mdc_getattr(struct lustre_handle *conn,
 111                 obd_id ino, int type, unsigned long valid, size_t ea_size,
 112                 struct ptlrpc_request **request)
 113 {
 114         struct ptlrpc_request *req;
 115         struct mds_body *body;
 116         int rc, size[2] = {sizeof(*body), 0}, bufcount = 1;
 117         ENTRY;
 118
 119         req = ptlrpc_prep_req(class_conn2cliimp(conn), MDS_GETATTR, 1, size,
 120                               NULL);
 121         if (!req)
 122                 GOTO(out, rc = -ENOMEM);
 123
 124         body = lustre_msg_buf(req->rq_reqmsg, 0);
 125         ll_ino2fid(&body->fid1, ino, 0, type);
 126         body->valid = valid;
 127
 128         if (ea_size) {
 129                 size[bufcount] = ea_size;
 130                 bufcount++;
 131                 body->size = ea_size;
 132                 CDEBUG(D_INODE, "reserving %d bytes for MD/symlink in packet\n",
 133                        ea_size);
 134         }
 135         req->rq_replen = lustre_msg_size(bufcount, size);
 136         mds_pack_req_body(req);
 137
 138         rc = ptlrpc_queue_wait(req);
 139         rc = ptlrpc_check_status(req, rc);
 140
 141         if (!rc) {
 142                 body = lustre_msg_buf(req->rq_repmsg, 0);
 143                 mds_unpack_body(body);
 144                 CDEBUG(D_NET, "mode: %o\n", body->mode);
 145         }
 146
 147         EXIT;
 148  out:
 149         *request = req;
 150         return rc;
 151 }
 152
 153 void d_delete_aliases(struct inode *inode)
 154 {
 155         struct dentry *dentry = NULL;
 156         struct list_head *tmp;
 157         struct ll_sb_info *sbi = ll_i2sbi(inode);
 158         ENTRY;
 159
 160         spin_lock(&dcache_lock);
 161         list_for_each(tmp, &inode->i_dentry) {
 162                 dentry = list_entry(tmp, struct dentry, d_alias);
 163
 164                 //                if (atomic_read(&dentry->d_count))
 165                 //      continue;
 166                 //if (!list_empty(&dentry->d_lru))
 167                 //        continue;
 168
 169                 list_del_init(&dentry->d_hash);
 170                 list_add(&dentry->d_hash, &sbi->ll_orphan_dentry_list);
 171         }
 172
 173         spin_unlock(&dcache_lock);
 174         EXIT;
 175 }
 176
 177 static int mdc_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 178                             void *data, __u32 data_len, int flag)
 179 {
 180         int rc;
 181         struct lustre_handle lockh;
 182         ENTRY;
 183
 184         switch (flag) {
 185         case LDLM_CB_BLOCKING:
 186                 ldlm_lock2handle(lock, &lockh);
 187                 rc = ldlm_cli_cancel(&lockh);
 188                 if (rc < 0) {
 189                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 190                         RETURN(rc);
 191                 }
 192                 break;
 193         case LDLM_CB_CANCELING: {
 194                 /* Invalidate all dentries associated with this inode */
 195                 struct inode *inode = data;
 196
 197 #warning "FIXME: what tells us that 'inode' is valid at all?"
 198                 if (inode->i_state & I_FREEING)
 199                         break;
 200
 201                 LASSERT(inode != NULL);
 202                 LASSERT(data_len == sizeof(*inode));
 203
 204                 if (S_ISDIR(inode->i_mode)) {
 205                         CDEBUG(D_INODE, "invalidating inode %ld\n",
 206                                inode->i_ino);
 207
 208                         ll_invalidate_inode_pages(inode);
 209                 }
 210
 211                 if ( inode != inode->i_sb->s_root->d_inode ) {
 212                         /* XXX should this igrab move up 12 lines? */
 213                         LASSERT(igrab(inode) == inode);
 214                         d_delete_aliases(inode);
 215                         iput(inode);
 216                 }
 217                 break;
 218         }
 219         default:
 220                 LBUG();
 221         }
 222
 223         RETURN(0);
 224 }
 225
 226 /* This should be called with both the request and the reply still packed. */
 227 void mdc_store_inode_generation(struct ptlrpc_request *req, int reqoff,
 228                                 int repoff)
 229 {
 230         struct mds_rec_create *rec = lustre_msg_buf(req->rq_reqmsg, reqoff);
 231         struct mds_body *body = lustre_msg_buf(req->rq_repmsg, repoff);
 232
 233         memcpy(&rec->cr_replayfid, &body->fid1, sizeof rec->cr_replayfid);
 234 }
 235
 236 int mdc_enqueue(struct lustre_handle *conn, int lock_type,
 237                 struct lookup_intent *it, int lock_mode, struct inode *dir,
 238                 struct dentry *de, struct lustre_handle *lockh,
 239                 char *tgt, int tgtlen, void *data, int datalen)
 240 {
 241         struct ptlrpc_request *req;
 242         struct obd_device *obddev = class_conn2obd(conn);
 243         __u64 res_id[RES_NAME_SIZE] = {dir->i_ino, (__u64)dir->i_generation};
 244         int size[6] = {sizeof(struct ldlm_request), sizeof(struct ldlm_intent)};
 245         int rc, flags = LDLM_FL_HAS_INTENT;
 246         int repsize[3] = {sizeof(struct ldlm_reply),
 247                           sizeof(struct mds_body),
 248                           obddev->u.cli.cl_max_mds_easize};
 249         struct ldlm_reply *dlm_rep;
 250         struct ldlm_intent *lit;
 251         struct ldlm_request *lockreq;
 252         ENTRY;
 253
 254         LDLM_DEBUG_NOLOCK("mdsintent %s dir %ld", ldlm_it2str(it->it_op),
 255                           dir->i_ino);
 256
 257         if (it->it_op & (IT_MKDIR | IT_CREAT | IT_SYMLINK | IT_MKNOD)) {
 258                 switch (it->it_op) {
 259                 case IT_MKDIR:
 260                         it->it_mode |= S_IFDIR;
 261                         break;
 262                 case (IT_CREAT|IT_OPEN):
 263                 case IT_CREAT:
 264                         it->it_mode |= S_IFREG;
 265                         break;
 266                 case IT_SYMLINK:
 267                         it->it_mode |= S_IFLNK;
 268                         break;
 269                 }
 270                 it->it_mode &= ~current->fs->umask;
 271
 272                 size[2] = sizeof(struct mds_rec_create);
 273                 size[3] = de->d_name.len + 1;
 274                 size[4] = tgtlen + 1;
 275                 req = ptlrpc_prep_req(class_conn2cliimp(conn), LDLM_ENQUEUE, 5,
 276                                       size, NULL);
 277                 if (!req)
 278                         RETURN(-ENOMEM);
 279
 280                 /* pack the intent */
 281                 lit = lustre_msg_buf(req->rq_reqmsg, 1);
 282                 lit->opc = NTOH__u64((__u64)it->it_op);
 283
 284                 /* pack the intended request */
 285                 mds_create_pack(req, 2, dir, it->it_mode, 0, current->fsuid,
 286                                 current->fsgid, CURRENT_TIME, de->d_name.name,
 287                                 de->d_name.len, tgt, tgtlen);
 288                 req->rq_replen = lustre_msg_size(3, repsize);
 289         } else if (it->it_op == IT_RENAME2) {
 290                 struct dentry *old_de = it->it_data;
 291
 292                 size[2] = sizeof(struct mds_rec_rename);
 293                 size[3] = old_de->d_name.len + 1;
 294                 size[4] = de->d_name.len + 1;
 295                 req = ptlrpc_prep_req(class_conn2cliimp(conn), LDLM_ENQUEUE, 5,
 296                                       size, NULL);
 297                 if (!req)
 298                         RETURN(-ENOMEM);
 299
 300                 /* pack the intent */
 301                 lit = lustre_msg_buf(req->rq_reqmsg, 1);
 302                 lit->opc = NTOH__u64((__u64)it->it_op);
 303
 304                 /* pack the intended request */
 305                 mds_rename_pack(req, 2, old_de->d_parent->d_inode, dir,
 306                                 old_de->d_name.name, old_de->d_name.len,
 307                                 de->d_name.name, de->d_name.len);
 308                 req->rq_replen = lustre_msg_size(3, repsize);
 309         } else if (it->it_op == IT_LINK2) {
 310                 struct dentry *old_de = it->it_data;
 311
 312                 size[2] = sizeof(struct mds_rec_link);
 313                 size[3] = de->d_name.len + 1;
 314                 req = ptlrpc_prep_req(class_conn2cliimp(conn), LDLM_ENQUEUE, 4,
 315                                       size, NULL);
 316                 if (!req)
 317                         RETURN(-ENOMEM);
 318
 319                 /* pack the intent */
 320                 lit = lustre_msg_buf(req->rq_reqmsg, 1);
 321                 lit->opc = NTOH__u64((__u64)it->it_op);
 322
 323                 /* pack the intended request */
 324                 mds_link_pack(req, 2, old_de->d_inode, dir,
 325                               de->d_name.name, de->d_name.len);
 326                 req->rq_replen = lustre_msg_size(3, repsize);
 327         } else if (it->it_op == IT_UNLINK || it->it_op == IT_RMDIR) {
 328                 size[2] = sizeof(struct mds_rec_unlink);
 329                 size[3] = de->d_name.len + 1;
 330                 req = ptlrpc_prep_req(class_conn2cliimp(conn), LDLM_ENQUEUE, 4,
 331                                       size, NULL);
 332                 if (!req)
 333                         RETURN(-ENOMEM);
 334
 335                 /* pack the intent */
 336                 lit = lustre_msg_buf(req->rq_reqmsg, 1);
 337                 lit->opc = NTOH__u64((__u64)it->it_op);
 338
 339                 /* pack the intended request */
 340                 mds_unlink_pack(req, 2, dir, NULL,
 341                                 it->it_op == IT_UNLINK ? S_IFREG : S_IFDIR,
 342                                 de->d_name.name, de->d_name.len);
 343
 344                 req->rq_replen = lustre_msg_size(3, repsize);
 345         } else if (it->it_op & (IT_GETATTR | IT_RENAME | IT_LINK |
 346                    IT_OPEN | IT_SETATTR | IT_LOOKUP | IT_READLINK)) {
 347                 size[2] = sizeof(struct mds_body);
 348                 size[3] = de->d_name.len + 1;
 349
 350                 req = ptlrpc_prep_req(class_conn2cliimp(conn), LDLM_ENQUEUE, 4,
 351                                       size, NULL);
 352                 if (!req)
 353                         RETURN(-ENOMEM);
 354
 355                 /* pack the intent */
 356                 lit = lustre_msg_buf(req->rq_reqmsg, 1);
 357                 lit->opc = NTOH__u64((__u64)it->it_op);
 358
 359                 /* pack the intended request */
 360                 mds_getattr_pack(req, 2, dir, de->d_name.name, de->d_name.len);
 361
 362                 /* get ready for the reply */
 363                 req->rq_replen = lustre_msg_size(3, repsize);
 364         } else if (it->it_op == IT_READDIR) {
 365                 req = ptlrpc_prep_req(class_conn2cliimp(conn), LDLM_ENQUEUE, 1,
 366                                       size, NULL);
 367                 if (!req)
 368                         RETURN(-ENOMEM);
 369
 370                 /* get ready for the reply */
 371                 req->rq_replen = lustre_msg_size(1, repsize);
 372         } else {
 373                 LBUG();
 374                 RETURN(-EINVAL);
 375         }
 376
 377         rc = ldlm_cli_enqueue(conn, req, obddev->obd_namespace, NULL, res_id,
 378                               lock_type, NULL, 0, lock_mode, &flags,
 379                               ldlm_completion_ast, mdc_blocking_ast, data,
 380                               datalen, lockh);
 381
 382         if (it->it_op != IT_READDIR) {
 383                 /* XXX This should become a lustre_msg flag, but for now... */
 384                 __u32 *opp = lustre_msg_buf(req->rq_reqmsg, 2);
 385                 *opp |= REINT_REPLAYING;
 386         }
 387
 388         if (rc == -ENOENT) {
 389                 /* This can go when we're sure that this can never happen */
 390                 LBUG();
 391         }
 392         if (rc == ELDLM_LOCK_ABORTED) {
 393                 lock_mode = 0;
 394                 memset(lockh, 0, sizeof(*lockh));
 395                 /* rc = 0 */
 396         } else if (rc != 0) {
 397                 CERROR("ldlm_cli_enqueue: %d\n", rc);
 398                 RETURN(rc);
 399         } else {
 400                 /* The server almost certainly gave us a lock other than the one
 401                  * that we asked for.  If we already have a matching lock, then
 402                  * cancel this one--we don't need two. */
 403                 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
 404                 struct lustre_handle lockh2;
 405                 LASSERT(lock);
 406
 407                 LDLM_DEBUG(lock, "matching against this");
 408
 409                 memcpy(&lockh2, lockh, sizeof(lockh2));
 410                 if (ldlm_lock_match(NULL, NULL, LDLM_PLAIN, NULL, 0, LCK_NL,
 411                                     &lockh2)) {
 412                         /* We already have a lock; cancel the old one */
 413                         ldlm_lock_decref(lockh, lock_mode);
 414                         ldlm_cli_cancel(lockh);
 415                         memcpy(lockh, &lockh2, sizeof(lockh2));
 416                 }
 417                 LDLM_LOCK_PUT(lock);
 418         }
 419
 420         /* On replay, we don't want the lock granted. */
 421         lockreq = lustre_msg_buf(req->rq_reqmsg, 0);
 422         lockreq->lock_flags |= LDLM_FL_INTENT_ONLY;
 423
 424         dlm_rep = lustre_msg_buf(req->rq_repmsg, 0);
 425         it->it_disposition = (int) dlm_rep->lock_policy_res1;
 426         it->it_status = (int) dlm_rep->lock_policy_res2;
 427         it->it_lock_mode = lock_mode;
 428         it->it_data = req;
 429
 430         RETURN(0);
 431 }
 432
 433 int mdc_cancel_unused(struct lustre_handle *conn, struct inode *inode,
 434                       int flags)
 435 {
 436         __u64 res_id[RES_NAME_SIZE] = {inode->i_ino, inode->i_generation};
 437         struct obd_device *obddev = class_conn2obd(conn);
 438         ENTRY;
 439         RETURN(ldlm_cli_cancel_unused(obddev->obd_namespace, res_id, flags));
 440 }
 441
 442 struct replay_open_data {
 443         struct lustre_handle *fh;
 444 };
 445
 446 static void mdc_replay_open(struct ptlrpc_request *req)
 447 {
 448         int offset;
 449         struct replay_open_data *saved;
 450         struct mds_body *body = lustre_msg_buf(req->rq_repmsg, 0);
 451
 452         if (lustre_msg_get_op_flags(req->rq_reqmsg) & MDS_OPEN_HAS_EA)
 453                 offset = 2;
 454         else
 455                 offset = 1;
 456
 457         saved = lustre_msg_buf(req->rq_reqmsg, offset);
 458         mds_unpack_body(body);
 459         CDEBUG(D_HA, "updating from "LPD64"/"LPD64" to "LPD64"/"LPD64"\n",
 460                saved->fh->addr, saved->fh->cookie,
 461                body->handle.addr, body->handle.cookie);
 462         memcpy(saved->fh, &body->handle, sizeof(body->handle));
 463 }
 464
 465 int mdc_open(struct lustre_handle *conn, obd_id ino, int type, int flags,
 466              struct lov_mds_md *lmm, int lmm_size, struct lustre_handle *fh,
 467              struct ptlrpc_request **request)
 468 {
 469         struct mds_body *body;
 470         struct replay_open_data *replay_data;
 471         int rc, size[3] = {sizeof(*body), sizeof(*replay_data)}, bufcount = 2;
 472         struct ptlrpc_request *req;
 473         ENTRY;
 474
 475         if (lmm && lmm_size) {
 476                 bufcount = 3;
 477                 size[2] = size[1]; /* shuffle the spare data along */
 478                 size[1] = lmm_size;
 479         }
 480
 481         req = ptlrpc_prep_req(class_conn2cliimp(conn), MDS_OPEN, bufcount, size,
 482                               NULL);
 483         if (!req)
 484                 GOTO(out, rc = -ENOMEM);
 485
 486         req->rq_flags |= PTL_RPC_FL_REPLAY;
 487         body = lustre_msg_buf(req->rq_reqmsg, 0);
 488
 489         ll_ino2fid(&body->fid1, ino, 0, type);
 490         body->flags = HTON__u32(flags);
 491         memcpy(&body->handle, fh, sizeof(body->handle));
 492
 493         if (lmm && lmm_size) {
 494                 CDEBUG(D_INODE, "sending %u bytes MD for ino LPU64\n",
 495                        lmm_size, ino);
 496                 lustre_msg_set_op_flags(req->rq_reqmsg, MDS_OPEN_HAS_EA);
 497                 memcpy(lustre_msg_buf(req->rq_reqmsg, 1), lmm, lmm_size);
 498                 body->flags |= HTON__u32(OBD_MD_FLEASIZE);
 499         }
 500
 501         req->rq_replen = lustre_msg_size(1, size);
 502
 503         rc = ptlrpc_queue_wait(req);
 504         rc = ptlrpc_check_status(req, rc);
 505         if (!rc) {
 506                 body = lustre_msg_buf(req->rq_repmsg, 0);
 507                 mds_unpack_body(body);
 508                 memcpy(fh, &body->handle, sizeof(*fh));
 509         }
 510
 511         /* If open is replayed, we need to fix up the fh. */
 512         req->rq_replay_cb = mdc_replay_open;
 513         replay_data = lustre_msg_buf(req->rq_reqmsg, lmm ? 2 : 1);
 514         replay_data->fh = fh;
 515
 516         EXIT;
 517  out:
 518         *request = req;
 519         return rc;
 520 }
 521
 522 int mdc_close(struct lustre_handle *conn, obd_id ino, int type,
 523               struct lustre_handle *fh, struct ptlrpc_request **request)
 524 {
 525         struct mds_body *body;
 526         int rc, size = sizeof(*body);
 527         struct ptlrpc_request *req;
 528
 529         req = ptlrpc_prep_req(class_conn2cliimp(conn), MDS_CLOSE, 1, &size,
 530                               NULL);
 531         if (!req)
 532                 GOTO(out, rc = -ENOMEM);
 533
 534         body = lustre_msg_buf(req->rq_reqmsg, 0);
 535         ll_ino2fid(&body->fid1, ino, 0, type);
 536         memcpy(&body->handle, fh, sizeof(body->handle));
 537
 538         req->rq_replen = lustre_msg_size(0, NULL);
 539
 540         rc = ptlrpc_queue_wait(req);
 541         rc = ptlrpc_check_status(req, rc);
 542
 543         EXIT;
 544  out:
 545         *request = req;
 546         return rc;
 547 }
 548
 549 int mdc_readpage(struct lustre_handle *conn, obd_id ino, int type, __u64 offset,
 550                  char *addr, struct ptlrpc_request **request)
 551 {
 552         struct ptlrpc_connection *connection =
 553                 client_conn2cli(conn)->cl_import.imp_connection;
 554         struct ptlrpc_request *req = NULL;
 555         struct ptlrpc_bulk_desc *desc = NULL;
 556         struct ptlrpc_bulk_page *bulk = NULL;
 557         struct mds_body *body;
 558         int rc, size = sizeof(*body);
 559         ENTRY;
 560
 561         CDEBUG(D_INODE, "inode: %ld\n", (long)ino);
 562
 563         desc = ptlrpc_prep_bulk(connection);
 564         if (desc == NULL)
 565                 GOTO(out, rc = -ENOMEM);
 566
 567         req = ptlrpc_prep_req(class_conn2cliimp(conn), MDS_READPAGE, 1, &size,
 568                               NULL);
 569         if (!req)
 570                 GOTO(out2, rc = -ENOMEM);
 571
 572         bulk = ptlrpc_prep_bulk_page(desc);
 573         bulk->bp_buflen = PAGE_SIZE;
 574         bulk->bp_buf = addr;
 575         bulk->bp_xid = req->rq_xid;
 576         desc->bd_portal = MDS_BULK_PORTAL;
 577
 578         rc = ptlrpc_register_bulk(desc);
 579         if (rc) {
 580                 CERROR("couldn't setup bulk sink: error %d.\n", rc);
 581                 GOTO(out2, rc);
 582         }
 583
 584         body = lustre_msg_buf(req->rq_reqmsg, 0);
 585         body->fid1.id = ino;
 586         body->fid1.f_type = type;
 587         body->size = offset;
 588
 589         req->rq_replen = lustre_msg_size(1, &size);
 590         rc = ptlrpc_queue_wait(req);
 591         rc = ptlrpc_check_status(req, rc);
 592         if (rc) {
 593                 ptlrpc_abort_bulk(desc);
 594                 GOTO(out2, rc);
 595         } else {
 596                 body = lustre_msg_buf(req->rq_repmsg, 0);
 597                 mds_unpack_body(body);
 598         }
 599
 600         EXIT;
 601  out2:
 602         ptlrpc_free_bulk(desc);
 603  out:
 604         *request = req;
 605         return rc;
 606 }
 607
 608 static int mdc_statfs(struct lustre_handle *conn, struct obd_statfs *osfs)
 609 {
 610         struct ptlrpc_request *req;
 611         int rc, size = sizeof(*osfs);
 612         ENTRY;
 613
 614         req = ptlrpc_prep_req(class_conn2cliimp(conn), MDS_STATFS, 0, NULL,
 615                               NULL);
 616         if (!req)
 617                 RETURN(-ENOMEM);
 618
 619         req->rq_replen = lustre_msg_size(1, &size);
 620
 621         rc = ptlrpc_queue_wait(req);
 622         rc = ptlrpc_check_status(req, rc);
 623
 624         if (rc)
 625                 GOTO(out, rc);
 626
 627         obd_statfs_unpack(osfs, lustre_msg_buf(req->rq_repmsg, 0));
 628
 629         EXIT;
 630 out:
 631         ptlrpc_req_finished(req);
 632
 633         return rc;
 634 }
 635 int mdc_attach(struct obd_device *dev, obd_count len, void *data)
 636 {
 637         return lprocfs_reg_obd(dev, status_var_nm_1, dev);
 638 }
 639
 640 int mdc_detach(struct obd_device *dev)
 641 {
 642         return lprocfs_dereg_obd(dev);
 643 }
 644 struct obd_ops mdc_obd_ops = {
 645         o_attach: mdc_attach,
 646         o_detach: mdc_detach,
 647         o_setup:   client_obd_setup,
 648         o_cleanup: client_obd_cleanup,
 649         o_connect: client_obd_connect,
 650         o_disconnect: client_obd_disconnect,
 651         o_statfs: mdc_statfs,
 652 };
 653
 654 static int __init ptlrpc_request_init(void)
 655 {
 656         return class_register_type(&mdc_obd_ops, status_class_var,
 657                                    LUSTRE_MDC_NAME);
 658 }
 659
 660 static void __exit ptlrpc_request_exit(void)
 661 {
 662         class_unregister_type(LUSTRE_MDC_NAME);
 663 }
 664
 665 MODULE_AUTHOR("Cluster File Systems <info@clusterfs.com>");
 666 MODULE_DESCRIPTION("Lustre Metadata Client v1.0");
 667 MODULE_LICENSE("GPL");
 668
 669 EXPORT_SYMBOL(d_delete_aliases);
 670 EXPORT_SYMBOL(mdc_getstatus);
 671 EXPORT_SYMBOL(mdc_getlovinfo);
 672 EXPORT_SYMBOL(mdc_enqueue);
 673 EXPORT_SYMBOL(mdc_cancel_unused);
 674 EXPORT_SYMBOL(mdc_getattr);
 675 EXPORT_SYMBOL(mdc_create);
 676 EXPORT_SYMBOL(mdc_unlink);
 677 EXPORT_SYMBOL(mdc_rename);
 678 EXPORT_SYMBOL(mdc_link);
 679 EXPORT_SYMBOL(mdc_readpage);
 680 EXPORT_SYMBOL(mdc_setattr);
 681 EXPORT_SYMBOL(mdc_close);
 682 EXPORT_SYMBOL(mdc_open);
 683
 684 EXPORT_SYMBOL(mdc_store_inode_generation);
 685
 686 module_init(ptlrpc_request_init);
 687 module_exit(ptlrpc_request_exit);