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/obd_lov.h>
  33 #include <linux/lprocfs_status.h>
  34
  35 #define REQUEST_MINOR 244
  36
  37 extern int mds_queue_req(struct ptlrpc_request *);
  38 extern struct lprocfs_vars status_var_nm_1[];
  39 extern struct lprocfs_vars status_class_var[];
  40
  41 /* should become mdc_getinfo() */
  42 int mdc_getstatus(struct lustre_handle *conn, struct ll_fid *rootfid)
  43 {
  44         struct ptlrpc_request *req;
  45         struct mds_body *body;
  46         int rc, size = sizeof(*body);
  47         ENTRY;
  48
  49         req = ptlrpc_prep_req(class_conn2cliimp(conn), MDS_GETSTATUS, 1, &size,
  50                               NULL);
  51         if (!req)
  52                 GOTO(out, rc = -ENOMEM);
  53
  54         body = lustre_msg_buf(req->rq_reqmsg, 0);
  55         req->rq_level = LUSTRE_CONN_CON;
  56         req->rq_replen = lustre_msg_size(1, &size);
  57
  58         mds_pack_req_body(req);
  59         rc = ptlrpc_queue_wait(req);
  60         rc = ptlrpc_check_status(req, rc);
  61
  62         if (!rc) {
  63                 body = lustre_msg_buf(req->rq_repmsg, 0);
  64                 mds_unpack_body(body);
  65                 memcpy(rootfid, &body->fid1, sizeof(*rootfid));
  66
  67                 CDEBUG(D_NET, "root ino="LPU64", last_committed="LPU64
  68                        ", last_xid="LPU64"\n",
  69                        rootfid->id, req->rq_repmsg->last_committed,
  70                        req->rq_repmsg->last_xid);
  71         }
  72
  73         EXIT;
  74  out:
  75         ptlrpc_req_finished(req);
  76         return rc;
  77 }
  78
  79 int mdc_getlovinfo(struct obd_device *obd, struct lustre_handle *mdc_connh,
  80                    struct ptlrpc_request **request)
  81 {
  82         struct ptlrpc_request *req;
  83         struct mds_status_req *streq;
  84         int rc, size[2] = {sizeof(*streq)};
  85         ENTRY;
  86
  87         req = ptlrpc_prep_req(class_conn2cliimp(mdc_connh), MDS_GETLOVINFO, 1,
  88                               size, NULL);
  89         if (!req)
  90                 GOTO(out, rc = -ENOMEM);
  91
  92         *request = req;
  93         streq = lustre_msg_buf(req->rq_reqmsg, 0);
  94         streq->flags = HTON__u32(MDS_STATUS_LOV);
  95         streq->repbuf = HTON__u32(8192);
  96
  97         /* prepare for reply */
  98         req->rq_level = LUSTRE_CONN_CON;
  99         size[0] = 512;
 100         size[1] = 8192;
 101         req->rq_replen = lustre_msg_size(2, size);
 102
 103         rc = ptlrpc_queue_wait(req);
 104         rc = ptlrpc_check_status(req, rc);
 105
 106  out:
 107         RETURN(rc);
 108 }
 109
 110
 111 int mdc_getattr(struct lustre_handle *conn,
 112                 obd_id ino, int type, unsigned long valid, size_t ea_size,
 113                 struct ptlrpc_request **request)
 114 {
 115         struct ptlrpc_request *req;
 116         struct mds_body *body;
 117         int rc, size[2] = {sizeof(*body), 0}, bufcount = 1;
 118         ENTRY;
 119
 120         req = ptlrpc_prep_req(class_conn2cliimp(conn), MDS_GETATTR, 1, size,
 121                               NULL);
 122         if (!req)
 123                 GOTO(out, rc = -ENOMEM);
 124
 125         body = lustre_msg_buf(req->rq_reqmsg, 0);
 126         ll_ino2fid(&body->fid1, ino, 0, type);
 127         body->valid = valid;
 128
 129         if (S_ISREG(type)) {
 130                 struct client_obd *mdc = &class_conn2obd(conn)->u.cli;
 131                 bufcount = 2;
 132                 size[1] = mdc->cl_max_mds_easize;
 133         } else if (valid & OBD_MD_LINKNAME) {
 134                 bufcount = 2;
 135                 size[1] = ea_size;
 136                 body->size = ea_size;
 137                 CDEBUG(D_INODE, "allocating %d bytes for symlink in packet\n",
 138                        ea_size);
 139         }
 140         req->rq_replen = lustre_msg_size(bufcount, size);
 141         mds_pack_req_body(req);
 142
 143         rc = ptlrpc_queue_wait(req);
 144         rc = ptlrpc_check_status(req, rc);
 145
 146         if (!rc) {
 147                 body = lustre_msg_buf(req->rq_repmsg, 0);
 148                 mds_unpack_body(body);
 149                 CDEBUG(D_NET, "mode: %o\n", body->mode);
 150         }
 151
 152         EXIT;
 153  out:
 154         *request = req;
 155         return rc;
 156 }
 157
 158 void d_delete_aliases(struct inode *inode)
 159 {
 160         struct dentry *dentry = NULL;
 161         struct list_head *tmp;
 162         struct ll_sb_info *sbi = ll_i2sbi(inode);
 163         ENTRY;
 164
 165         spin_lock(&dcache_lock);
 166         list_for_each(tmp, &inode->i_dentry) {
 167                 dentry = list_entry(tmp, struct dentry, d_alias);
 168
 169                 //                if (atomic_read(&dentry->d_count))
 170                 //      continue;
 171                 //if (!list_empty(&dentry->d_lru))
 172                 //        continue;
 173
 174                 list_del_init(&dentry->d_hash);
 175                 list_add(&dentry->d_hash, &sbi->ll_orphan_dentry_list);
 176         }
 177
 178         spin_unlock(&dcache_lock);
 179         EXIT;
 180 }
 181
 182 static int mdc_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
 183                             void *data, __u32 data_len, int flag)
 184 {
 185         int rc;
 186         struct lustre_handle lockh;
 187         ENTRY;
 188
 189         switch (flag) {
 190         case LDLM_CB_BLOCKING:
 191                 ldlm_lock2handle(lock, &lockh);
 192                 rc = ldlm_cli_cancel(&lockh);
 193                 if (rc < 0) {
 194                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
 195                         RETURN(rc);
 196                 }
 197                 break;
 198         case LDLM_CB_CANCELING: {
 199                 /* Invalidate all dentries associated with this inode */
 200                 struct inode *inode = data;
 201
 202 #warning "FIXME: what tells us that 'inode' is valid at all?"
 203                 if (inode->i_state & I_FREEING)
 204                         break;
 205
 206                 LASSERT(inode != NULL);
 207                 LASSERT(data_len == sizeof(*inode));
 208
 209                 if (S_ISDIR(inode->i_mode)) {
 210                         CDEBUG(D_INODE, "invalidating inode %ld\n",
 211                                inode->i_ino);
 212
 213                         ll_invalidate_inode_pages(inode);
 214                 }
 215
 216                 if ( inode != inode->i_sb->s_root->d_inode ) {
 217                         /* XXX should this igrab move up 12 lines? */
 218                         LASSERT(igrab(inode) == inode);
 219                         d_delete_aliases(inode);
 220                         iput(inode);
 221                 }
 222                 break;
 223         }
 224         default:
 225                 LBUG();
 226         }
 227
 228         RETURN(0);
 229 }
 230
 231 /* This should be called with both the request and the reply still packed. */
 232 void mdc_store_inode_generation(struct ptlrpc_request *req, int reqoff,
 233                                 int repoff)
 234 {
 235         struct mds_rec_create *rec = lustre_msg_buf(req->rq_reqmsg, reqoff);
 236         struct mds_body *body = lustre_msg_buf(req->rq_repmsg, repoff);
 237
 238         memcpy(&rec->cr_replayfid, &body->fid1, sizeof rec->cr_replayfid);
 239 }
 240
 241 int mdc_enqueue(struct lustre_handle *conn, int lock_type,
 242                 struct lookup_intent *it, int lock_mode, struct inode *dir,
 243                 struct dentry *de, struct lustre_handle *lockh,
 244                 char *tgt, int tgtlen, void *data, int datalen)
 245 {
 246         struct ptlrpc_request *req;
 247         struct obd_device *obddev = class_conn2obd(conn);
 248         __u64 res_id[RES_NAME_SIZE] = {dir->i_ino, (__u64)dir->i_generation};
 249         int size[6] = {sizeof(struct ldlm_request), sizeof(struct ldlm_intent)};
 250         int rc, flags = LDLM_FL_HAS_INTENT;
 251         int repsize[3] = {sizeof(struct ldlm_reply),
 252                           sizeof(struct mds_body),
 253                           obddev->u.cli.cl_max_mds_easize};
 254         struct ldlm_reply *dlm_rep;
 255         struct ldlm_intent *lit;
 256         struct ldlm_request *lockreq;
 257         ENTRY;
 258
 259         LDLM_DEBUG_NOLOCK("mdsintent %s dir %ld", ldlm_it2str(it->it_op),
 260                           dir->i_ino);
 261
 262         if (it->it_op & (IT_MKDIR | IT_CREAT | IT_SYMLINK | IT_MKNOD)) {
 263                 switch (it->it_op) {
 264                 case IT_MKDIR:
 265                         it->it_mode |= S_IFDIR;
 266                         break;
 267                 case (IT_CREAT|IT_OPEN):
 268                 case IT_CREAT:
 269                         it->it_mode |= S_IFREG;
 270                         break;
 271                 case IT_SYMLINK:
 272                         it->it_mode |= S_IFLNK;
 273                         break;
 274                 }
 275                 it->it_mode &= ~current->fs->umask;
 276
 277                 size[2] = sizeof(struct mds_rec_create);
 278                 size[3] = de->d_name.len + 1;
 279                 size[4] = tgtlen + 1;
 280                 req = ptlrpc_prep_req(class_conn2cliimp(conn), LDLM_ENQUEUE, 5,
 281                                       size, NULL);
 282                 if (!req)
 283                         RETURN(-ENOMEM);
 284
 285                 /* pack the intent */
 286                 lit = lustre_msg_buf(req->rq_reqmsg, 1);
 287                 lit->opc = NTOH__u64((__u64)it->it_op);
 288
 289                 /* pack the intended request */
 290                 mds_create_pack(req, 2, dir, it->it_mode, 0, current->fsuid,
 291                                 current->fsgid, CURRENT_TIME, de->d_name.name,
 292                                 de->d_name.len, tgt, tgtlen);
 293                 req->rq_replen = lustre_msg_size(3, repsize);
 294         } else if (it->it_op == IT_RENAME2) {
 295                 struct dentry *old_de = it->it_data;
 296
 297                 size[2] = sizeof(struct mds_rec_rename);
 298                 size[3] = old_de->d_name.len + 1;
 299                 size[4] = de->d_name.len + 1;
 300                 req = ptlrpc_prep_req(class_conn2cliimp(conn), LDLM_ENQUEUE, 5,
 301                                       size, NULL);
 302                 if (!req)
 303                         RETURN(-ENOMEM);
 304
 305                 /* pack the intent */
 306                 lit = lustre_msg_buf(req->rq_reqmsg, 1);
 307                 lit->opc = NTOH__u64((__u64)it->it_op);
 308
 309                 /* pack the intended request */
 310                 mds_rename_pack(req, 2, old_de->d_parent->d_inode, dir,
 311                                 old_de->d_name.name, old_de->d_name.len,
 312                                 de->d_name.name, de->d_name.len);
 313                 req->rq_replen = lustre_msg_size(3, repsize);
 314         } else if (it->it_op == IT_LINK2) {
 315                 struct dentry *old_de = it->it_data;
 316
 317                 size[2] = sizeof(struct mds_rec_link);
 318                 size[3] = de->d_name.len + 1;
 319                 req = ptlrpc_prep_req(class_conn2cliimp(conn), LDLM_ENQUEUE, 4,
 320                                       size, NULL);
 321                 if (!req)
 322                         RETURN(-ENOMEM);
 323
 324                 /* pack the intent */
 325                 lit = lustre_msg_buf(req->rq_reqmsg, 1);
 326                 lit->opc = NTOH__u64((__u64)it->it_op);
 327
 328                 /* pack the intended request */
 329                 mds_link_pack(req, 2, old_de->d_inode, dir,
 330                               de->d_name.name, de->d_name.len);
 331                 req->rq_replen = lustre_msg_size(3, repsize);
 332         } else if (it->it_op == IT_UNLINK || it->it_op == IT_RMDIR) {
 333                 size[2] = sizeof(struct mds_rec_unlink);
 334                 size[3] = de->d_name.len + 1;
 335                 req = ptlrpc_prep_req(class_conn2cliimp(conn), LDLM_ENQUEUE, 4,
 336                                       size, NULL);
 337                 if (!req)
 338                         RETURN(-ENOMEM);
 339
 340                 /* pack the intent */
 341                 lit = lustre_msg_buf(req->rq_reqmsg, 1);
 342                 lit->opc = NTOH__u64((__u64)it->it_op);
 343
 344                 /* pack the intended request */
 345                 mds_unlink_pack(req, 2, dir, NULL,
 346                                 it->it_op == IT_UNLINK ? S_IFREG : S_IFDIR,
 347                                 de->d_name.name, de->d_name.len);
 348
 349                 req->rq_replen = lustre_msg_size(3, repsize);
 350         } else if (it->it_op  & (IT_GETATTR | IT_RENAME | IT_LINK |
 351                    IT_OPEN |  IT_SETATTR | IT_LOOKUP | IT_READLINK)) {
 352                 size[2] = sizeof(struct mds_body);
 353                 size[3] = de->d_name.len + 1;
 354
 355                 req = ptlrpc_prep_req(class_conn2cliimp(conn), LDLM_ENQUEUE, 4,
 356                                       size, NULL);
 357                 if (!req)
 358                         RETURN(-ENOMEM);
 359
 360                 /* pack the intent */
 361                 lit = lustre_msg_buf(req->rq_reqmsg, 1);
 362                 lit->opc = NTOH__u64((__u64)it->it_op);
 363
 364                 /* pack the intended request */
 365                 mds_getattr_pack(req, 2, dir, de->d_name.name, de->d_name.len);
 366
 367                 /* get ready for the reply */
 368                 req->rq_replen = lustre_msg_size(3, repsize);
 369         } else if (it->it_op == IT_READDIR) {
 370                 req = ptlrpc_prep_req(class_conn2cliimp(conn), LDLM_ENQUEUE, 1,
 371                                       size, NULL);
 372                 if (!req)
 373                         RETURN(-ENOMEM);
 374
 375                 /* get ready for the reply */
 376                 req->rq_replen = lustre_msg_size(1, repsize);
 377         } else {
 378                 LBUG();
 379                 RETURN(-EINVAL);
 380         }
 381
 382         rc = ldlm_cli_enqueue(conn, req, obddev->obd_namespace, NULL, res_id,
 383                               lock_type, NULL, 0, lock_mode, &flags,
 384                               ldlm_completion_ast, mdc_blocking_ast, data,
 385                               datalen, lockh);
 386
 387         if (it->it_op != IT_READDIR) {
 388                 /* XXX This should become a lustre_msg flag, but for now... */
 389                 __u32 *opp = lustre_msg_buf(req->rq_reqmsg, 2);
 390                 *opp |= REINT_REPLAYING;
 391         }
 392
 393         if (rc == -ENOENT) {
 394                 /* This can go when we're sure that this can never happen */
 395                 LBUG();
 396         }
 397         if (rc == ELDLM_LOCK_ABORTED) {
 398                 lock_mode = 0;
 399                 memset(lockh, 0, sizeof(*lockh));
 400                 /* rc = 0 */
 401         } else if (rc != 0) {
 402                 CERROR("ldlm_cli_enqueue: %d\n", rc);
 403                 RETURN(rc);
 404         } else {
 405                 /* The server almost certainly gave us a lock other than the one
 406                  * that we asked for.  If we already have a matching lock, then
 407                  * cancel this one--we don't need two. */
 408                 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
 409                 struct lustre_handle lockh2;
 410                 LASSERT(lock);
 411
 412                 LDLM_DEBUG(lock, "matching against this");
 413
 414                 memcpy(&lockh2, lockh, sizeof(lockh2));
 415                 if (ldlm_lock_match(NULL, NULL, LDLM_PLAIN, NULL, 0, LCK_NL,
 416                                     &lockh2)) {
 417                         /* We already have a lock; cancel the old one */
 418                         ldlm_lock_decref(lockh, lock_mode);
 419                         ldlm_cli_cancel(lockh);
 420                         memcpy(lockh, &lockh2, sizeof(lockh2));
 421                 }
 422                 LDLM_LOCK_PUT(lock);
 423         }
 424
 425         /* On replay, we don't want the lock granted. */
 426         lockreq = lustre_msg_buf(req->rq_reqmsg, 0);
 427         lockreq->lock_flags |= LDLM_FL_INTENT_ONLY;
 428
 429         dlm_rep = lustre_msg_buf(req->rq_repmsg, 0);
 430         it->it_disposition = (int) dlm_rep->lock_policy_res1;
 431         it->it_status = (int) dlm_rep->lock_policy_res2;
 432         it->it_lock_mode = lock_mode;
 433         it->it_data = req;
 434
 435         RETURN(0);
 436 }
 437
 438 int mdc_cancel_unused(struct lustre_handle *conn, struct inode *inode,
 439                       int flags)
 440 {
 441         __u64 res_id[RES_NAME_SIZE] = {inode->i_ino, inode->i_generation};
 442         struct obd_device *obddev = class_conn2obd(conn);
 443         ENTRY;
 444         RETURN(ldlm_cli_cancel_unused(obddev->obd_namespace, res_id, flags));
 445 }
 446
 447 struct replay_open_data {
 448         struct lustre_handle *fh;
 449 };
 450
 451 static void mdc_replay_open(struct ptlrpc_request *req)
 452 {
 453         int offset;
 454         struct replay_open_data *saved;
 455         struct mds_body *body = lustre_msg_buf(req->rq_repmsg, 0);
 456
 457         if (lustre_msg_get_op_flags(req->rq_reqmsg) & MDS_OPEN_HAS_EA)
 458                 offset = 2;
 459         else
 460                 offset = 1;
 461
 462         saved = lustre_msg_buf(req->rq_reqmsg, offset);
 463         mds_unpack_body(body);
 464         CDEBUG(D_HA, "updating from "LPD64"/"LPD64" to "LPD64"/"LPD64"\n",
 465                saved->fh->addr, saved->fh->cookie,
 466                body->handle.addr, body->handle.cookie);
 467         memcpy(saved->fh, &body->handle, sizeof(body->handle));
 468 }
 469
 470 int mdc_open(struct lustre_handle *conn, obd_id ino, int type, int flags,
 471              struct lov_stripe_md *lsm, struct lustre_handle *fh,
 472              struct ptlrpc_request **request)
 473 {
 474         struct mds_body *body;
 475         struct replay_open_data *replay_data;
 476         int rc, size[3] = {sizeof(*body), sizeof(*replay_data)}, bufcount = 2;
 477         struct ptlrpc_request *req;
 478         ENTRY;
 479
 480         if (lsm) {
 481                 bufcount = 3;
 482                 size[2] = size[1]; /* shuffle the spare data along */
 483
 484                 size[1] = lsm->lsm_mds_easize;
 485         }
 486
 487         req = ptlrpc_prep_req(class_conn2cliimp(conn), MDS_OPEN, bufcount, size,
 488                               NULL);
 489         if (!req)
 490                 GOTO(out, rc = -ENOMEM);
 491
 492         if (lsm)
 493                 lustre_msg_set_op_flags(req->rq_reqmsg, MDS_OPEN_HAS_EA);
 494
 495
 496         req->rq_flags |= PTL_RPC_FL_REPLAY;
 497         body = lustre_msg_buf(req->rq_reqmsg, 0);
 498
 499         ll_ino2fid(&body->fid1, ino, 0, type);
 500         body->flags = HTON__u32(flags);
 501         memcpy(&body->handle, fh, sizeof(body->handle));
 502
 503         if (lsm)
 504                 lov_packmd(lustre_msg_buf(req->rq_reqmsg, 1), lsm);
 505
 506         req->rq_replen = lustre_msg_size(1, size);
 507
 508         rc = ptlrpc_queue_wait(req);
 509         rc = ptlrpc_check_status(req, rc);
 510         if (!rc) {
 511                 body = lustre_msg_buf(req->rq_repmsg, 0);
 512                 mds_unpack_body(body);
 513                 memcpy(fh, &body->handle, sizeof(*fh));
 514         }
 515
 516         /* If open is replayed, we need to fix up the fh. */
 517         req->rq_replay_cb = mdc_replay_open;
 518         replay_data = lustre_msg_buf(req->rq_reqmsg, lsm ? 2 : 1);
 519         replay_data->fh = fh;
 520
 521         EXIT;
 522  out:
 523         *request = req;
 524         return rc;
 525 }
 526
 527 int mdc_close(struct lustre_handle *conn, obd_id ino, int type,
 528               struct lustre_handle *fh, struct ptlrpc_request **request)
 529 {
 530         struct mds_body *body;
 531         int rc, size = sizeof(*body);
 532         struct ptlrpc_request *req;
 533
 534         req = ptlrpc_prep_req(class_conn2cliimp(conn), MDS_CLOSE, 1, &size,
 535                               NULL);
 536         if (!req)
 537                 GOTO(out, rc = -ENOMEM);
 538
 539         body = lustre_msg_buf(req->rq_reqmsg, 0);
 540         ll_ino2fid(&body->fid1, ino, 0, type);
 541         memcpy(&body->handle, fh, sizeof(body->handle));
 542
 543         req->rq_replen = lustre_msg_size(0, NULL);
 544
 545         rc = ptlrpc_queue_wait(req);
 546         rc = ptlrpc_check_status(req, rc);
 547
 548         EXIT;
 549  out:
 550         *request = req;
 551         return rc;
 552 }
 553
 554 int mdc_readpage(struct lustre_handle *conn, obd_id ino, int type, __u64 offset,
 555                  char *addr, struct ptlrpc_request **request)
 556 {
 557         struct ptlrpc_connection *connection =
 558                 client_conn2cli(conn)->cl_import.imp_connection;
 559         struct ptlrpc_request *req = NULL;
 560         struct ptlrpc_bulk_desc *desc = NULL;
 561         struct ptlrpc_bulk_page *bulk = NULL;
 562         struct mds_body *body;
 563         int rc, size = sizeof(*body);
 564         ENTRY;
 565
 566         CDEBUG(D_INODE, "inode: %ld\n", (long)ino);
 567
 568         desc = ptlrpc_prep_bulk(connection);
 569         if (desc == NULL)
 570                 GOTO(out, rc = -ENOMEM);
 571
 572         req = ptlrpc_prep_req(class_conn2cliimp(conn), MDS_READPAGE, 1, &size,
 573                               NULL);
 574         if (!req)
 575                 GOTO(out2, rc = -ENOMEM);
 576
 577         bulk = ptlrpc_prep_bulk_page(desc);
 578         bulk->bp_buflen = PAGE_SIZE;
 579         bulk->bp_buf = addr;
 580         bulk->bp_xid = req->rq_xid;
 581         desc->bd_portal = MDS_BULK_PORTAL;
 582
 583         rc = ptlrpc_register_bulk(desc);
 584         if (rc) {
 585                 CERROR("couldn't setup bulk sink: error %d.\n", rc);
 586                 GOTO(out2, rc);
 587         }
 588
 589         body = lustre_msg_buf(req->rq_reqmsg, 0);
 590         body->fid1.id = ino;
 591         body->fid1.f_type = type;
 592         body->size = offset;
 593
 594         req->rq_replen = lustre_msg_size(1, &size);
 595         rc = ptlrpc_queue_wait(req);
 596         rc = ptlrpc_check_status(req, rc);
 597         if (rc) {
 598                 ptlrpc_abort_bulk(desc);
 599                 GOTO(out2, rc);
 600         } else {
 601                 body = lustre_msg_buf(req->rq_repmsg, 0);
 602                 mds_unpack_body(body);
 603         }
 604
 605         EXIT;
 606  out2:
 607         ptlrpc_free_bulk(desc);
 608  out:
 609         *request = req;
 610         return rc;
 611 }
 612
 613 static int mdc_statfs(struct lustre_handle *conn, struct obd_statfs *osfs)
 614 {
 615         struct ptlrpc_request *req;
 616         int rc, size = sizeof(*osfs);
 617         ENTRY;
 618
 619         req = ptlrpc_prep_req(class_conn2cliimp(conn), MDS_STATFS, 0, NULL,
 620                               NULL);
 621         if (!req)
 622                 RETURN(-ENOMEM);
 623
 624         req->rq_replen = lustre_msg_size(1, &size);
 625
 626         rc = ptlrpc_queue_wait(req);
 627         rc = ptlrpc_check_status(req, rc);
 628
 629         if (rc)
 630                 GOTO(out, rc);
 631
 632         obd_statfs_unpack(osfs, lustre_msg_buf(req->rq_repmsg, 0));
 633
 634         EXIT;
 635 out:
 636         ptlrpc_req_finished(req);
 637
 638         return rc;
 639 }
 640 int mdc_attach(struct obd_device *dev, obd_count len, void *data)
 641 {
 642         return lprocfs_reg_obd(dev, status_var_nm_1, dev);
 643 }
 644
 645 int mdc_detach(struct obd_device *dev)
 646 {
 647         return lprocfs_dereg_obd(dev);
 648 }
 649 struct obd_ops mdc_obd_ops = {
 650         o_attach: mdc_attach,
 651         o_detach: mdc_detach,
 652         o_setup:   client_obd_setup,
 653         o_cleanup: client_obd_cleanup,
 654         o_connect: client_obd_connect,
 655         o_disconnect: client_obd_disconnect,
 656         o_statfs: mdc_statfs,
 657 };
 658
 659 static int __init ptlrpc_request_init(void)
 660 {
 661         return class_register_type(&mdc_obd_ops, status_class_var,
 662                                    LUSTRE_MDC_NAME);
 663 }
 664
 665 static void __exit ptlrpc_request_exit(void)
 666 {
 667         class_unregister_type(LUSTRE_MDC_NAME);
 668 }
 669
 670 MODULE_AUTHOR("Cluster File Systems <info@clusterfs.com>");
 671 MODULE_DESCRIPTION("Lustre Metadata Client v1.0");
 672 MODULE_LICENSE("GPL");
 673
 674 EXPORT_SYMBOL(d_delete_aliases);
 675 EXPORT_SYMBOL(mdc_getstatus);
 676 EXPORT_SYMBOL(mdc_getlovinfo);
 677 EXPORT_SYMBOL(mdc_enqueue);
 678 EXPORT_SYMBOL(mdc_cancel_unused);
 679 EXPORT_SYMBOL(mdc_getattr);
 680 EXPORT_SYMBOL(mdc_create);
 681 EXPORT_SYMBOL(mdc_unlink);
 682 EXPORT_SYMBOL(mdc_rename);
 683 EXPORT_SYMBOL(mdc_link);
 684 EXPORT_SYMBOL(mdc_readpage);
 685 EXPORT_SYMBOL(mdc_setattr);
 686 EXPORT_SYMBOL(mdc_close);
 687 EXPORT_SYMBOL(mdc_open);
 688
 689 EXPORT_SYMBOL(mdc_store_inode_generation);
 690
 691 module_init(ptlrpc_request_init);
 692 module_exit(ptlrpc_request_exit);