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