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) 2001-2003 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 #ifndef EXPORT_SYMTAB
  23 # define EXPORT_SYMTAB
  24 #endif
  25 #define DEBUG_SUBSYSTEM S_MDC
  26
  27 #ifdef __KERNEL__
  28 # include <linux/module.h>
  29 # include <linux/pagemap.h>
  30 # include <linux/miscdevice.h>
  31 # include <linux/init.h>
  32 #else
  33 # include <liblustre.h>
  34 #endif
  35
  36 #include <linux/obd_class.h>
  37 #include <linux/lustre_mds.h>
  38 #include <linux/lustre_dlm.h>
  39 #include <linux/lprocfs_status.h>
  40 #include "mdc_internal.h"
  41
  42 #define REQUEST_MINOR 244
  43
  44 static int mdc_cleanup(struct obd_device *obd, int flags);
  45
  46 extern int mds_queue_req(struct ptlrpc_request *);
  47 /* Helper that implements most of mdc_getstatus and signal_completed_replay. */
  48 /* XXX this should become mdc_get_info("key"), sending MDS_GET_INFO RPC */
  49 static int send_getstatus(struct obd_import *imp, struct ll_fid *rootfid,
  50                           int level, int msg_flags)
  51 {
  52         struct ptlrpc_request *req;
  53         struct mds_body *body;
  54         int rc, size = sizeof(*body);
  55         ENTRY;
  56
  57         req = ptlrpc_prep_req(imp, MDS_GETSTATUS, 1, &size, NULL);
  58         if (!req)
  59                 GOTO(out, rc = -ENOMEM);
  60
  61         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
  62         req->rq_send_state = level;
  63         req->rq_replen = lustre_msg_size(1, &size);
  64
  65         mdc_pack_req_body(req);
  66         req->rq_reqmsg->flags |= msg_flags;
  67         rc = ptlrpc_queue_wait(req);
  68
  69         if (!rc) {
  70                 body = lustre_swab_repbuf (req, 0, sizeof (*body),
  71                                            lustre_swab_mds_body);
  72                 if (body == NULL) {
  73                         CERROR ("Can't extract mds_body\n");
  74                         GOTO (out, rc = -EPROTO);
  75                 }
  76
  77                 memcpy(rootfid, &body->fid1, sizeof(*rootfid));
  78
  79                 CDEBUG(D_NET, "root ino="LPU64", last_committed="LPU64
  80                        ", last_xid="LPU64"\n",
  81                        rootfid->id, req->rq_repmsg->last_committed,
  82                        req->rq_repmsg->last_xid);
  83         }
  84
  85         EXIT;
  86  out:
  87         ptlrpc_req_finished(req);
  88         return rc;
  89 }
  90
  91 /* This should be mdc_get_info("rootfid") */
  92 int mdc_getstatus(struct obd_export *exp, struct ll_fid *rootfid)
  93 {
  94         return send_getstatus(class_exp2cliimp(exp), rootfid, LUSTRE_IMP_FULL,
  95                               0);
  96 }
  97
  98 int mdc_getattr_common(struct obd_export *exp, unsigned int ea_size,
  99                        struct ptlrpc_request *req)
 100 {
 101         struct mds_body *body;
 102         void            *eadata;
 103         int              rc;
 104         int              size[2] = {sizeof(*body), 0};
 105         int              bufcount = 1;
 106         ENTRY;
 107
 108         /* request message already built */
 109
 110         if (ea_size != 0) {
 111                 size[bufcount++] = ea_size;
 112                 CDEBUG(D_INODE, "reserved %u bytes for MD/symlink in packet\n",
 113                        ea_size);
 114         }
 115         req->rq_replen = lustre_msg_size(bufcount, size);
 116
 117         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 118         rc = ptlrpc_queue_wait(req);
 119         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 120         if (rc != 0)
 121                 RETURN (rc);
 122
 123         body = lustre_swab_repbuf (req, 0, sizeof (*body),
 124                                    lustre_swab_mds_body);
 125         if (body == NULL) {
 126                 CERROR ("Can't unpack mds_body\n");
 127                 RETURN (-EPROTO);
 128         }
 129
 130         CDEBUG(D_NET, "mode: %o\n", body->mode);
 131
 132         LASSERT_REPSWAB (req, 1);
 133         if (body->eadatasize != 0) {
 134                 /* reply indicates presence of eadata; check it's there... */
 135                 eadata = lustre_msg_buf (req->rq_repmsg, 1, body->eadatasize);
 136                 if (eadata == NULL) {
 137                         CERROR ("Missing/short eadata\n");
 138                         RETURN (-EPROTO);
 139                 }
 140         }
 141
 142         RETURN (0);
 143 }
 144
 145 int mdc_getattr(struct obd_export *exp, struct ll_fid *fid,
 146                 unsigned long valid, unsigned int ea_size,
 147                 struct ptlrpc_request **request)
 148 {
 149         struct ptlrpc_request *req;
 150         struct mds_body *body;
 151         int size = sizeof(*body);
 152         int rc;
 153         ENTRY;
 154
 155         /* XXX do we need to make another request here?  We just did a getattr
 156          *     to do the lookup in the first place.
 157          */
 158         req = ptlrpc_prep_req(class_exp2cliimp(exp), MDS_GETATTR, 1, &size,
 159                               NULL);
 160         if (!req)
 161                 GOTO(out, rc = -ENOMEM);
 162
 163         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
 164         memcpy(&body->fid1, fid, sizeof(*fid));
 165         body->valid = valid;
 166         body->eadatasize = ea_size;
 167         mdc_pack_req_body(req);
 168
 169         rc = mdc_getattr_common(exp, ea_size, req);
 170         if (rc != 0) {
 171                 ptlrpc_req_finished (req);
 172                 req = NULL;
 173         }
 174  out:
 175         *request = req;
 176         RETURN (rc);
 177 }
 178
 179 int mdc_getattr_name(struct obd_export *exp, struct ll_fid *fid,
 180                      char *filename, int namelen, unsigned long valid,
 181                      unsigned int ea_size, struct ptlrpc_request **request)
 182 {
 183         struct ptlrpc_request *req;
 184         struct mds_body *body;
 185         int rc, size[2] = {sizeof(*body), namelen};
 186         ENTRY;
 187
 188         req = ptlrpc_prep_req(class_exp2cliimp(exp), MDS_GETATTR_NAME, 2,
 189                               size, NULL);
 190         if (!req)
 191                 GOTO(out, rc = -ENOMEM);
 192
 193         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
 194         memcpy(&body->fid1, fid, sizeof(*fid));
 195         body->valid = valid;
 196         body->eadatasize = ea_size;
 197         mdc_pack_req_body(req);
 198
 199         LASSERT (strnlen (filename, namelen) == namelen - 1);
 200         memcpy(lustre_msg_buf(req->rq_reqmsg, 1, namelen), filename, namelen);
 201
 202         rc = mdc_getattr_common(exp, ea_size, req);
 203         if (rc != 0) {
 204                 ptlrpc_req_finished (req);
 205                 req = NULL;
 206         }
 207  out:
 208         *request = req;
 209         RETURN(rc);
 210 }
 211
 212 /* This should be called with both the request and the reply still packed. */
 213 void mdc_store_inode_generation(struct ptlrpc_request *req, int reqoff,
 214                                 int repoff)
 215 {
 216         struct mds_rec_create *rec =
 217                 lustre_msg_buf(req->rq_reqmsg, reqoff, sizeof(*rec));
 218         struct mds_body *body =
 219                 lustre_msg_buf(req->rq_repmsg, repoff, sizeof(*body));
 220
 221         LASSERT (rec != NULL);
 222         LASSERT (body != NULL);
 223
 224         memcpy(&rec->cr_replayfid, &body->fid1, sizeof rec->cr_replayfid);
 225         DEBUG_REQ(D_HA, req, "storing generation %u for ino "LPU64,
 226                   rec->cr_replayfid.generation, rec->cr_replayfid.id);
 227 }
 228
 229 int mdc_req2lustre_md(struct ptlrpc_request *req, int offset,
 230                       struct obd_export *exp_osc,
 231                       struct obd_export *exp_mdc,
 232                       struct lustre_md *md)
 233 {
 234         int rc = 0;
 235         ENTRY;
 236
 237         LASSERT(md);
 238         memset(md, 0, sizeof(*md));
 239
 240         md->body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*md->body));
 241         LASSERT (md->body != NULL);
 242         LASSERT_REPSWABBED (req, offset);
 243
 244         if (!(md->body->valid & OBD_MD_FLEASIZE))
 245                 RETURN(0);
 246
 247         /* ea is presented in reply, parse it */
 248         if (S_ISREG(md->body->mode)) {
 249                 int lmmsize;
 250                 struct lov_mds_md *lmm;
 251
 252                 if (md->body->eadatasize == 0) {
 253                         CERROR ("OBD_MD_FLEASIZE set, but eadatasize 0\n");
 254                         RETURN(-EPROTO);
 255                 }
 256                 lmmsize = md->body->eadatasize;
 257                 lmm = lustre_msg_buf(req->rq_repmsg, offset + 1, lmmsize);
 258                 LASSERT (lmm != NULL);
 259                 LASSERT_REPSWABBED (req, offset + 1);
 260
 261                 rc = obd_unpackmd(exp_osc, &md->lsm, lmm, lmmsize);
 262                 if (rc >= 0) {
 263                         LASSERT (rc >= sizeof (*md->lsm));
 264                         rc = 0;
 265                 }
 266         } else if (S_ISDIR(md->body->mode)) {
 267                 struct mea *mea;
 268                 int mdsize;
 269                 LASSERT(exp_mdc != NULL);
 270                 /* dir can be non-splitted */
 271                 if (md->body->eadatasize == 0)
 272                         RETURN(0);
 273
 274                 mdsize = md->body->eadatasize;
 275                 mea = lustre_msg_buf(req->rq_repmsg, offset + 1, mdsize);
 276                 LASSERT(mea != NULL);
 277
 278                 rc = obd_unpackmd(exp_mdc, (void *) &md->mea,
 279                                   (void *) mea, mdsize);
 280                 if (rc >= 0) {
 281                         LASSERT (rc >= sizeof (*md->mea));
 282                         rc = 0;
 283                 }
 284         } else {
 285                 LASSERT(0);
 286         }
 287         RETURN(rc);
 288 }
 289
 290 static void mdc_commit_open(struct ptlrpc_request *req)
 291 {
 292         struct mdc_open_data *mod = req->rq_cb_data;
 293         if (mod == NULL)
 294                 return;
 295
 296         if (mod->mod_close_req != NULL)
 297                 mod->mod_close_req->rq_cb_data = NULL;
 298
 299         if (mod->mod_och != NULL)
 300                 mod->mod_och->och_mod = NULL;
 301
 302         OBD_FREE(mod, sizeof(*mod));
 303         req->rq_cb_data = NULL;
 304 }
 305
 306 static void mdc_replay_open(struct ptlrpc_request *req)
 307 {
 308         struct mdc_open_data *mod = req->rq_cb_data;
 309         struct obd_client_handle *och;
 310         struct ptlrpc_request *close_req;
 311         struct lustre_handle old;
 312         struct mds_body *body;
 313         ENTRY;
 314
 315         body = lustre_swab_repbuf(req, 1, sizeof(*body), lustre_swab_mds_body);
 316         LASSERT (body != NULL);
 317
 318         if (mod == NULL) {
 319                 DEBUG_REQ(D_ERROR, req,
 320                           "can't properly replay without open data");
 321                 EXIT;
 322                 return;
 323         }
 324
 325         och = mod->mod_och;
 326         if (och != NULL) {
 327                 struct lustre_handle *file_fh;
 328                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 329                 file_fh = &och->och_fh;
 330                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 331                        file_fh->cookie, body->handle.cookie);
 332                 memcpy(&old, file_fh, sizeof(old));
 333                 memcpy(file_fh, &body->handle, sizeof(*file_fh));
 334         }
 335
 336         close_req = mod->mod_close_req;
 337         if (close_req != NULL) {
 338                 struct mds_body *close_body;
 339                 LASSERT(close_req->rq_reqmsg->opc == MDS_CLOSE);
 340                 close_body = lustre_msg_buf(close_req->rq_reqmsg, 0,
 341                                             sizeof(*close_body));
 342                 if (och != NULL)
 343                         LASSERT(!memcmp(&old, &close_body->handle, sizeof old));
 344                 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
 345                 memcpy(&close_body->handle, &body->handle,
 346                        sizeof(close_body->handle));
 347         }
 348
 349         EXIT;
 350 }
 351
 352 void mdc_set_open_replay_data(struct obd_client_handle *och,
 353                               struct ptlrpc_request *open_req)
 354 {
 355         struct mdc_open_data *mod;
 356         struct mds_rec_create *rec =
 357                 lustre_msg_buf(open_req->rq_reqmsg, 2, sizeof(*rec));
 358         struct mds_body *body =
 359                 lustre_msg_buf(open_req->rq_repmsg, 1, sizeof(*body));
 360
 361         LASSERT(rec != NULL);
 362         /* outgoing messages always in my byte order */
 363         LASSERT(body != NULL);
 364         /* incoming message in my byte order (it's been swabbed) */
 365         LASSERT_REPSWABBED(open_req, 1);
 366
 367         OBD_ALLOC(mod, sizeof(*mod));
 368         if (mod == NULL) {
 369                 DEBUG_REQ(D_ERROR, open_req, "can't allocate mdc_open_data");
 370                 return;
 371         }
 372
 373         och->och_mod = mod;
 374         mod->mod_och = och;
 375         mod->mod_open_req = open_req;
 376
 377         memcpy(&rec->cr_replayfid, &body->fid1, sizeof rec->cr_replayfid);
 378         open_req->rq_replay_cb = mdc_replay_open;
 379         open_req->rq_commit_cb = mdc_commit_open;
 380         open_req->rq_cb_data = mod;
 381         DEBUG_REQ(D_HA, open_req, "set up replay data");
 382 }
 383
 384 void mdc_clear_open_replay_data(struct obd_client_handle *och)
 385 {
 386         struct mdc_open_data *mod = och->och_mod;
 387
 388         /* Don't free the structure now (it happens in mdc_commit_open, after
 389          * we're sure we won't need to fix up the close request in the future),
 390          * but make sure that replay doesn't poke at the och, which is about to
 391          * be freed. */
 392         LASSERT(mod != (void *)0x5a5a5a5a);
 393         if (mod != NULL)
 394                 mod->mod_och = NULL;
 395         och->och_mod = NULL;
 396 }
 397
 398 static void mdc_commit_close(struct ptlrpc_request *req)
 399 {
 400         struct mdc_open_data *mod = req->rq_cb_data;
 401         struct ptlrpc_request *open_req;
 402         struct obd_import *imp = req->rq_import;
 403
 404         DEBUG_REQ(D_HA, req, "close req committed");
 405         if (mod == NULL)
 406                 return;
 407
 408         mod->mod_close_req = NULL;
 409         req->rq_cb_data = NULL;
 410         req->rq_commit_cb = NULL;
 411
 412         open_req = mod->mod_open_req;
 413         LASSERT(open_req != NULL);
 414         LASSERT(open_req != (void *)0x5a5a5a5a);
 415
 416         DEBUG_REQ(D_HA, open_req, "open req balanced");
 417         LASSERT(open_req->rq_transno != 0);
 418         LASSERT(open_req->rq_import == imp);
 419
 420         /* We no longer want to preserve this for transno-unconditional
 421          * replay. */
 422         spin_lock(&open_req->rq_lock);
 423         open_req->rq_replay = 0;
 424         spin_unlock(&open_req->rq_lock);
 425 }
 426
 427 static int mdc_close_interpret(struct ptlrpc_request *req, void *data, int rc)
 428 {
 429         union ptlrpc_async_args *aa = data;
 430         struct mdc_rpc_lock *rpc_lock = aa->pointer_arg[0];
 431         struct obd_device *obd = aa->pointer_arg[1];
 432
 433         if (rpc_lock == NULL) {
 434                 CERROR("called with NULL rpc_lock\n");
 435         } else {
 436                 mdc_put_rpc_lock(rpc_lock, NULL);
 437                 LASSERTF(req->rq_async_args.pointer_arg[0] ==
 438                          obd->u.cli.cl_rpc_lock, "%p != %p\n",
 439                          req->rq_async_args.pointer_arg[0],
 440                          obd->u.cli.cl_rpc_lock);
 441                 aa->pointer_arg[0] = NULL;
 442         }
 443         wake_up(&req->rq_reply_waitq);
 444         RETURN(rc);
 445 }
 446
 447 /* We can't use ptlrpc_check_reply, because we don't want to wake up for
 448  * anything but a reply or an error. */
 449 static int mdc_close_check_reply(struct ptlrpc_request *req)
 450 {
 451         int rc = 0;
 452         unsigned long flags;
 453
 454         spin_lock_irqsave(&req->rq_lock, flags);
 455         if (PTLRPC_REQUEST_COMPLETE(req)) {
 456                 rc = 1;
 457         }
 458         spin_unlock_irqrestore (&req->rq_lock, flags);
 459         return rc;
 460 }
 461
 462 static int go_back_to_sleep(void *unused)
 463 {
 464         return 0;
 465 }
 466
 467 int mdc_close(struct obd_export *exp, struct obdo *obdo,
 468               struct obd_client_handle *och, struct ptlrpc_request **request)
 469 {
 470         struct mds_body *body;
 471         struct obd_device *obd = class_exp2obd(exp);
 472         int reqsize = sizeof(*body);
 473         int rc, repsize[3] = {sizeof(*body),
 474                               obd->u.cli.cl_max_mds_easize,
 475                               obd->u.cli.cl_max_mds_cookiesize};
 476         struct ptlrpc_request *req;
 477         struct mdc_open_data *mod;
 478         struct l_wait_info lwi;
 479         ENTRY;
 480
 481         req = ptlrpc_prep_req(class_exp2cliimp(exp), MDS_CLOSE, 1, &reqsize,
 482                               NULL);
 483         if (req == NULL)
 484                 GOTO(out, rc = -ENOMEM);
 485
 486         /* Ensure that this close's handle is fixed up during replay. */
 487         LASSERT(och != NULL);
 488         mod = och->och_mod;
 489         if (likely(mod != NULL)) {
 490                 mod->mod_close_req = req;
 491                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open req %p",
 492                           mod->mod_open_req);
 493         } else {
 494                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 495         }
 496
 497         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
 498         mdc_pack_fid(&body->fid1, obdo->o_id, 0, obdo->o_mode);
 499         memcpy(&body->handle, &och->och_fh, sizeof(body->handle));
 500         body->size = obdo->o_size;
 501         body->blocks = obdo->o_blocks;
 502         body->flags = obdo->o_flags;
 503         body->valid = obdo->o_valid;
 504
 505         req->rq_replen = lustre_msg_size(3, repsize);
 506         req->rq_commit_cb = mdc_commit_close;
 507         LASSERT(req->rq_cb_data == NULL);
 508         req->rq_cb_data = mod;
 509
 510         /* We hand a ref to the rpcd here, so we need another one of our own. */
 511         ptlrpc_request_addref(req);
 512
 513         mdc_get_rpc_lock(obd->u.cli.cl_rpc_lock, NULL);
 514         req->rq_interpret_reply = mdc_close_interpret;
 515         req->rq_async_args.pointer_arg[0] = obd->u.cli.cl_rpc_lock;
 516         req->rq_async_args.pointer_arg[1] = obd;
 517         ptlrpcd_add_req(req);
 518         lwi = LWI_TIMEOUT_INTR(MAX(req->rq_timeout * HZ, 1), go_back_to_sleep,
 519                                NULL, NULL);
 520         rc = l_wait_event(req->rq_reply_waitq, mdc_close_check_reply(req),
 521                           &lwi);
 522         if (rc == 0) {
 523                 rc = req->rq_repmsg->status;
 524                 if (req->rq_repmsg->type == PTL_RPC_MSG_ERR) {
 525                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
 526                                   "= %d", rc);
 527                         if (rc > 0)
 528                                 rc = -rc;
 529                 } else if (mod == NULL) {
 530                         CERROR("Unexpected: can't find mdc_open_data, but the "
 531                                "close succeeded.  Please tell CFS.\n");
 532                 }
 533                 if (!lustre_swab_repbuf(req, 0, sizeof(struct mds_body),
 534                                         lustre_swab_mds_body)) {
 535                         CERROR("Error unpacking mds_body\n");
 536                         rc = -EPROTO;
 537                 }
 538         }
 539         if (req->rq_async_args.pointer_arg[0] != NULL) {
 540                 CERROR("returned without dropping rpc_lock: rc %d\n", rc);
 541                 mdc_close_interpret(req, &req->rq_async_args, rc);
 542                 portals_debug_dumplog();
 543         }
 544
 545         EXIT;
 546  out:
 547         *request = req;
 548         return rc;
 549 }
 550
 551 int mdc_done_writing(struct obd_export *exp, struct obdo *obdo)
 552 {
 553         struct ptlrpc_request *req;
 554         struct mds_body *body;
 555         int rc, size = sizeof(*body);
 556         ENTRY;
 557
 558         req = ptlrpc_prep_req(class_exp2cliimp(exp), MDS_DONE_WRITING, 1,
 559                               &size, NULL);
 560         if (req == NULL)
 561                 RETURN(-ENOMEM);
 562
 563         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
 564         mdc_pack_fid(&body->fid1, obdo->o_id, 0, obdo->o_mode);
 565         body->size = obdo->o_size;
 566         body->blocks = obdo->o_blocks;
 567         body->flags = obdo->o_flags;
 568         body->valid = obdo->o_valid;
 569 //        memcpy(&body->handle, &och->och_fh, sizeof(body->handle));
 570
 571         req->rq_replen = lustre_msg_size(1, &size);
 572
 573         rc = ptlrpc_queue_wait(req);
 574         ptlrpc_req_finished(req);
 575         RETURN(rc);
 576 }
 577
 578 int mdc_readpage(struct obd_export *exp, struct ll_fid *mdc_fid,
 579                  __u64 offset, struct page *page,
 580                  struct ptlrpc_request **request)
 581 {
 582         struct obd_import *imp = class_exp2cliimp(exp);
 583         struct ptlrpc_request *req = NULL;
 584         struct ptlrpc_bulk_desc *desc = NULL;
 585         struct mds_body *body;
 586         int rc, size = sizeof(*body);
 587         ENTRY;
 588
 589         CDEBUG(D_INODE, "inode: %ld\n", (long)mdc_fid->id);
 590
 591         req = ptlrpc_prep_req(imp, MDS_READPAGE, 1, &size, NULL);
 592         if (req == NULL)
 593                 GOTO(out, rc = -ENOMEM);
 594         /* XXX FIXME bug 249 */
 595         req->rq_request_portal = MDS_READPAGE_PORTAL;
 596
 597         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_PUT_SINK, MDS_BULK_PORTAL);
 598         if (desc == NULL)
 599                 GOTO(out, rc = -ENOMEM);
 600         /* NB req now owns desc and will free it when it gets freed */
 601
 602         ptlrpc_prep_bulk_page(desc, page, 0, PAGE_CACHE_SIZE);
 603
 604         mdc_readdir_pack(req, offset, PAGE_CACHE_SIZE, mdc_fid);
 605
 606         req->rq_replen = lustre_msg_size(1, &size);
 607         rc = ptlrpc_queue_wait(req);
 608
 609         if (rc == 0) {
 610                 body = lustre_swab_repbuf(req, 0, sizeof (*body),
 611                                           lustre_swab_mds_body);
 612                 if (body == NULL) {
 613                         CERROR("Can't unpack mds_body\n");
 614                         GOTO(out, rc = -EPROTO);
 615                 }
 616
 617                 if (req->rq_bulk->bd_nob_transferred != PAGE_CACHE_SIZE) {
 618                         CERROR ("Unexpected # bytes transferred: %d"
 619                                 " (%ld expected)\n",
 620                                 req->rq_bulk->bd_nob_transferred,
 621                                 PAGE_CACHE_SIZE);
 622                         GOTO (out, rc = -EPROTO);
 623                 }
 624         }
 625
 626         EXIT;
 627  out:
 628         *request = req;
 629         return rc;
 630 }
 631
 632 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 633                          void *karg, void *uarg)
 634 {
 635         struct obd_device *obd = exp->exp_obd;
 636         struct obd_ioctl_data *data = karg;
 637         struct obd_import *imp = obd->u.cli.cl_import;
 638         struct llog_ctxt *ctxt;
 639         int rc;
 640         ENTRY;
 641
 642         MOD_INC_USE_COUNT;
 643
 644         switch (cmd) {
 645         case OBD_IOC_CLIENT_RECOVER:
 646                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1);
 647                 if (rc < 0)
 648                         GOTO(out, rc);
 649                 GOTO(out, rc = 0);
 650         case IOC_OSC_SET_ACTIVE:
 651                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
 652                 GOTO(out, rc);
 653         case OBD_IOC_PARSE: {
 654                 ctxt = llog_get_context(&exp->exp_obd->obd_llogs,
 655                                         LLOG_CONFIG_REPL_CTXT);
 656                 rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
 657                 GOTO(out, rc);
 658         }
 659 #ifdef __KERNEL__
 660         case OBD_IOC_LLOG_INFO:
 661         case OBD_IOC_LLOG_PRINT: {
 662                 ctxt = llog_get_context(&obd->obd_llogs, LLOG_CONFIG_REPL_CTXT);
 663                 rc = llog_ioctl(ctxt, cmd, data);
 664
 665                 GOTO(out, rc);
 666         }
 667 #endif
 668         default:
 669                 CERROR("osc_ioctl(): unrecognised ioctl %#x\n", cmd);
 670                 GOTO(out, rc = -ENOTTY);
 671         }
 672 out:
 673         MOD_DEC_USE_COUNT;
 674         return rc;
 675 }
 676
 677 int mdc_set_info(struct obd_export *exp, obd_count keylen,
 678                  void *key, obd_count vallen, void *val)
 679 {
 680         int rc = -EINVAL;
 681
 682         if (keylen == strlen("initial_recov") &&
 683             memcmp(key, "initial_recov", strlen("initial_recov")) == 0) {
 684                 struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
 685                 if (vallen != sizeof(int))
 686                         RETURN(-EINVAL);
 687                 imp->imp_initial_recov = *(int *)val;
 688                 CDEBUG(D_HA, "%s: set imp_no_init_recov = %d\n",
 689                        exp->exp_obd->obd_name,
 690                        imp->imp_initial_recov);
 691                 RETURN(0);
 692         } else if (keylen >= strlen("client") && strcmp(key, "client") == 0) {
 693                 struct ptlrpc_request *req;
 694                 char *bufs[1] = {key};
 695                 int rc;
 696                 req = ptlrpc_prep_req(class_exp2cliimp(exp), OST_SET_INFO, 1,
 697                                       &keylen, bufs);
 698                 if (req == NULL)
 699                         RETURN(-ENOMEM);
 700
 701                 req->rq_replen = lustre_msg_size(0, NULL);
 702                 rc = ptlrpc_queue_wait(req);
 703                 ptlrpc_req_finished(req);
 704                 RETURN(rc);
 705         }
 706
 707         RETURN(rc);
 708 }
 709
 710 static int mdc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 711                       unsigned long max_age)
 712 {
 713         struct ptlrpc_request *req;
 714         struct obd_statfs *msfs;
 715         int rc, size = sizeof(*msfs);
 716         ENTRY;
 717
 718         /* We could possibly pass max_age in the request (as an absolute
 719          * timestamp or a "seconds.usec ago") so the target can avoid doing
 720          * extra calls into the filesystem if that isn't necessary (e.g.
 721          * during mount that would help a bit).  Having relative timestamps
 722          * is not so great if request processing is slow, while absolute
 723          * timestamps are not ideal because they need time synchronization. */
 724         req = ptlrpc_prep_req(obd->u.cli.cl_import, MDS_STATFS, 0, NULL, NULL);
 725         if (!req)
 726                 RETURN(-ENOMEM);
 727
 728         req->rq_replen = lustre_msg_size(1, &size);
 729
 730         mdc_get_rpc_lock(obd->u.cli.cl_rpc_lock, NULL);
 731         rc = ptlrpc_queue_wait(req);
 732         mdc_put_rpc_lock(obd->u.cli.cl_rpc_lock, NULL);
 733
 734         if (rc)
 735                 GOTO(out, rc);
 736
 737         msfs = lustre_swab_repbuf(req, 0, sizeof(*msfs),lustre_swab_obd_statfs);
 738         if (msfs == NULL) {
 739                 CERROR("Can't unpack obd_statfs\n");
 740                 GOTO(out, rc = -EPROTO);
 741         }
 742
 743         memcpy(osfs, msfs, sizeof (*msfs));
 744         EXIT;
 745 out:
 746         ptlrpc_req_finished(req);
 747
 748         return rc;
 749 }
 750
 751 static int mdc_pin(struct obd_export *exp, obd_id ino, __u32 gen, int type,
 752                    struct obd_client_handle *handle, int flag)
 753 {
 754         struct ptlrpc_request *req;
 755         struct mds_body *body;
 756         int rc, size = sizeof(*body);
 757         ENTRY;
 758
 759         req = ptlrpc_prep_req(class_exp2cliimp(exp), MDS_PIN, 1, &size, NULL);
 760         if (req == NULL)
 761                 RETURN(-ENOMEM);
 762
 763         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
 764         mdc_pack_fid(&body->fid1, ino, gen, type);
 765         body->flags = flag;
 766
 767         req->rq_replen = lustre_msg_size(1, &size);
 768
 769         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 770         rc = ptlrpc_queue_wait(req);
 771         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 772         if (rc) {
 773                 CERROR("pin failed: %d\n", rc);
 774                 ptlrpc_req_finished(req);
 775                 RETURN(rc);
 776         }
 777
 778         body = lustre_swab_repbuf(req, 0, sizeof(*body), lustre_swab_mds_body);
 779         if (body == NULL) {
 780                 ptlrpc_req_finished(req);
 781                 RETURN(rc);
 782         }
 783
 784         memcpy(&handle->och_fh, &body->handle, sizeof(body->handle));
 785         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
 786
 787         OBD_ALLOC(handle->och_mod, sizeof(*handle->och_mod));
 788         if (handle->och_mod == NULL) {
 789                 DEBUG_REQ(D_ERROR, req, "can't allocate mdc_open_data");
 790                 RETURN(-ENOMEM);
 791         }
 792         handle->och_mod->mod_open_req = req; /* will be dropped by unpin */
 793
 794         RETURN(rc);
 795 }
 796
 797 static int mdc_unpin(struct obd_export *exp,
 798                      struct obd_client_handle *handle, int flag)
 799 {
 800         struct ptlrpc_request *req;
 801         struct mds_body *body;
 802         int rc, size = sizeof(*body);
 803         ENTRY;
 804
 805         if (handle->och_magic != OBD_CLIENT_HANDLE_MAGIC)
 806                 RETURN(0);
 807
 808         req = ptlrpc_prep_req(class_exp2cliimp(exp), MDS_CLOSE, 1, &size, NULL);
 809         if (req == NULL)
 810                 RETURN(-ENOMEM);
 811
 812         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
 813         memcpy(&body->handle, &handle->och_fh, sizeof(body->handle));
 814         body->flags = flag;
 815
 816         req->rq_replen = lustre_msg_size(0, NULL);
 817         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 818         rc = ptlrpc_queue_wait(req);
 819         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 820
 821         if (rc != 0)
 822                 CERROR("unpin failed: %d\n", rc);
 823
 824         ptlrpc_req_finished(req);
 825         ptlrpc_req_finished(handle->och_mod->mod_open_req);
 826         OBD_FREE(handle->och_mod, sizeof(*handle->och_mod));
 827         RETURN(rc);
 828 }
 829
 830 int mdc_sync(struct obd_export *exp, struct ll_fid *fid,
 831              struct ptlrpc_request **request)
 832 {
 833         struct ptlrpc_request *req;
 834         struct mds_body *body;
 835         int size = sizeof(*body);
 836         int rc;
 837         ENTRY;
 838
 839         req = ptlrpc_prep_req(class_exp2cliimp(exp), MDS_SYNC, 1,&size,NULL);
 840         if (!req)
 841                 RETURN(rc = -ENOMEM);
 842
 843         if (fid) {
 844                 body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
 845                 memcpy(&body->fid1, fid, sizeof(*fid));
 846                 mdc_pack_req_body(req);
 847         }
 848
 849         req->rq_replen = lustre_msg_size(1, &size);
 850
 851         rc = ptlrpc_queue_wait(req);
 852         if (rc || request == NULL)
 853                 ptlrpc_req_finished(req);
 854         else
 855                 *request = req;
 856
 857         RETURN(rc);
 858 }
 859
 860 static int mdc_attach(struct obd_device *dev, obd_count len, void *data)
 861 {
 862         struct lprocfs_static_vars lvars;
 863
 864         lprocfs_init_vars(mdc, &lvars);
 865         return lprocfs_obd_attach(dev, lvars.obd_vars);
 866 }
 867
 868 static int mdc_detach(struct obd_device *dev)
 869 {
 870         return lprocfs_obd_detach(dev);
 871 }
 872
 873 static int mdc_import_event(struct obd_device *obd,
 874                             struct obd_import *imp,
 875                             enum obd_import_event event)
 876 {
 877         int rc = 0;
 878
 879         LASSERT(imp->imp_obd == obd);
 880
 881         switch (event) {
 882         case IMP_EVENT_DISCON: {
 883                 break;
 884         }
 885         case IMP_EVENT_INACTIVE: {
 886                 if (obd->obd_observer)
 887                         rc = obd_notify(obd->obd_observer, obd, 0);
 888                 break;
 889         }
 890         case IMP_EVENT_INVALIDATE: {
 891                 struct ldlm_namespace *ns = obd->obd_namespace;
 892
 893                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
 894
 895                 break;
 896         }
 897         case IMP_EVENT_ACTIVE: {
 898                 if (obd->obd_observer)
 899                         rc = obd_notify(obd->obd_observer, obd, 1);
 900                 break;
 901         }
 902         default:
 903                 CERROR("Unknown import event %d\n", event);
 904                 LBUG();
 905         }
 906         RETURN(rc);
 907 }
 908
 909 static int mdc_setup(struct obd_device *obd, obd_count len, void *buf)
 910 {
 911         struct client_obd *cli = &obd->u.cli;
 912         int rc;
 913         ENTRY;
 914
 915         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
 916         if (!cli->cl_rpc_lock)
 917                 RETURN(-ENOMEM);
 918         mdc_init_rpc_lock(cli->cl_rpc_lock);
 919
 920         ptlrpcd_addref();
 921
 922         OBD_ALLOC(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
 923         if (!cli->cl_setattr_lock)
 924                 GOTO(out_free_rpc, rc = -ENOMEM);
 925         mdc_init_rpc_lock(cli->cl_setattr_lock);
 926
 927         rc = client_obd_setup(obd, len, buf);
 928         if (rc) {
 929                 OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
 930  out_free_rpc:
 931                 OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
 932         }
 933
 934         rc = obd_llog_init(obd, &obd->obd_llogs, obd, 0, NULL);
 935         if (rc) {
 936                 mdc_cleanup(obd, 0);
 937                 CERROR("failed to setup llogging subsystems\n");
 938         }
 939
 940         RETURN(rc);
 941 }
 942
 943 int mdc_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
 944 {
 945         struct obd_device *obd = exp->exp_obd;
 946         struct client_obd *cli = &obd->u.cli;
 947         ENTRY;
 948
 949         if (cli->cl_max_mds_easize < easize)
 950                 cli->cl_max_mds_easize = easize;
 951         if (cli->cl_max_mds_cookiesize < cookiesize)
 952                 cli->cl_max_mds_cookiesize = cookiesize;
 953         RETURN(0);
 954 }
 955
 956 static int mdc_precleanup(struct obd_device *obd, int flags)
 957 {
 958         int rc = 0;
 959
 960         rc = obd_llog_finish(obd, &obd->obd_llogs, 0);
 961         if (rc != 0)
 962                 CERROR("failed to cleanup llogging subsystems\n");
 963
 964         RETURN(rc);
 965 }
 966
 967 static int mdc_cleanup(struct obd_device *obd, int flags)
 968 {
 969         struct client_obd *cli = &obd->u.cli;
 970
 971         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
 972         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
 973
 974         ptlrpcd_decref();
 975
 976         return client_obd_cleanup(obd, flags);
 977 }
 978
 979
 980 static int mdc_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
 981                          struct obd_device *tgt, int count,
 982                          struct llog_catid *logid)
 983 {
 984         struct llog_ctxt *ctxt;
 985         int rc;
 986         ENTRY;
 987
 988         rc = llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
 989                         &llog_client_ops);
 990         if (rc == 0) {
 991                 ctxt = llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT);
 992                 ctxt->loc_imp = obd->u.cli.cl_import;
 993         }
 994
 995         RETURN(rc);
 996 }
 997
 998 static int mdc_llog_finish(struct obd_device *obd,
 999                            struct obd_llogs *llogs, int count)
1000 {
1001         int rc;
1002         ENTRY;
1003
1004         rc = llog_cleanup(llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT));
1005         RETURN(rc);
1006 }
1007
1008 int mdc_obj_create(struct obd_export *exp, struct obdo *oa,
1009                     struct lov_stripe_md **ea, struct obd_trans_info *oti)
1010 {
1011         struct ptlrpc_request *request;
1012         struct ost_body *body;
1013         int rc, size = sizeof(*body);
1014         ENTRY;
1015
1016         LASSERT(oa);
1017
1018         request = ptlrpc_prep_req(class_exp2cliimp(exp), OST_CREATE,
1019                                   1, &size, NULL);
1020         if (!request)
1021                 GOTO(out_req, rc = -ENOMEM);
1022
1023         body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
1024         memcpy(&body->oa, oa, sizeof(body->oa));
1025
1026         request->rq_replen = lustre_msg_size(1, &size);
1027         rc = ptlrpc_queue_wait(request);
1028         if (rc)
1029                 GOTO(out_req, rc);
1030
1031         body = lustre_swab_repbuf(request, 0, sizeof(*body),
1032                                   lustre_swab_ost_body);
1033         if (body == NULL) {
1034                 CERROR ("can't unpack ost_body\n");
1035                 GOTO (out_req, rc = -EPROTO);
1036         }
1037
1038         memcpy(oa, &body->oa, sizeof(*oa));
1039
1040         /* store ino/generation for recovery */
1041         body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
1042         body->oa.o_id = oa->o_id;
1043         body->oa.o_generation = oa->o_generation;
1044
1045         CDEBUG(D_HA, "transno: "LPD64"\n", request->rq_repmsg->transno);
1046         EXIT;
1047 out_req:
1048         ptlrpc_req_finished(request);
1049         return rc;
1050 }
1051
1052 static int mdc_get_info(struct obd_export *exp, obd_count keylen,
1053                         void *key, __u32 *vallen, void *val)
1054 {
1055         ENTRY;
1056         if (!vallen || !val)
1057                 RETURN(-EFAULT);
1058
1059         if (keylen >= strlen("mdsize") && strcmp(key, "mdsize") == 0) {
1060                 struct ptlrpc_request *req;
1061                 __u32 *reply;
1062                 char *bufs[1] = {key};
1063                 int rc;
1064                 req = ptlrpc_prep_req(class_exp2cliimp(exp), OST_GET_INFO, 1,
1065                                       &keylen, bufs);
1066                 if (req == NULL)
1067                         RETURN(-ENOMEM);
1068
1069                 req->rq_replen = lustre_msg_size(1, vallen);
1070                 rc = ptlrpc_queue_wait(req);
1071                 if (rc)
1072                         GOTO(out, rc);
1073
1074                 /* FIXME: right swap routine here! */
1075                 reply = lustre_swab_repbuf(req, 0, sizeof(*reply), NULL);
1076                 if (reply == NULL) {
1077                         CERROR("Can't unpack mdsize\n");
1078                         GOTO(out, rc = -EPROTO);
1079                 }
1080                 *((__u32 *)val) = *reply;
1081         out:
1082                 ptlrpc_req_finished(req);
1083                 RETURN(rc);
1084         }
1085         RETURN(-EINVAL);
1086 }
1087
1088 int mdc_brw(int rw, struct obd_export *exp, struct obdo *oa,
1089                 struct lov_stripe_md *ea, obd_count oa_bufs,
1090                 struct brw_page *pgarr, struct obd_trans_info *oti)
1091 {
1092         struct ptlrpc_bulk_desc *desc;
1093         struct niobuf_remote *niobuf;
1094         struct ptlrpc_request *req;
1095         struct obd_ioobj *ioobj;
1096         struct ost_body *body;
1097         int err, opc, i;
1098         int size[3];
1099
1100         opc = ((rw & OBD_BRW_WRITE) != 0) ? OST_WRITE : OST_READ;
1101
1102         size[0] = sizeof(*body);
1103         size[1] = sizeof(*ioobj);
1104         size[2] = oa_bufs * sizeof(*niobuf);
1105
1106         req = ptlrpc_prep_req(class_exp2cliimp(exp), opc, 3, size, NULL);
1107         LASSERT(req != NULL);
1108
1109         if (opc == OST_WRITE)
1110                 desc = ptlrpc_prep_bulk_imp(req, oa_bufs, BULK_GET_SOURCE,
1111                                             OST_BULK_PORTAL);
1112         else
1113                 desc = ptlrpc_prep_bulk_imp(req, oa_bufs, BULK_PUT_SINK,
1114                                             OST_BULK_PORTAL);
1115         LASSERT(desc != NULL);
1116
1117         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
1118         ioobj = lustre_msg_buf(req->rq_reqmsg, 1, sizeof(*ioobj));
1119         niobuf = lustre_msg_buf(req->rq_reqmsg, 2, oa_bufs * sizeof(*niobuf));
1120
1121         memcpy(&body->oa, oa, sizeof(*oa));
1122         obdo_to_ioobj(oa, ioobj);
1123         ioobj->ioo_bufcnt = oa_bufs;
1124
1125         for (i = 0; i < oa_bufs; i++, niobuf++) {
1126                 struct brw_page *pg = &pgarr[i];
1127
1128                 LASSERT(pg->count > 0);
1129                 LASSERT((pg->off & ~PAGE_MASK) + pg->count <= PAGE_SIZE);
1130
1131                 ptlrpc_prep_bulk_page(desc, pg->pg, pg->off & ~PAGE_MASK,
1132                                       pg->count);
1133
1134                 niobuf->offset = pg->off;
1135                 niobuf->len = pg->count;
1136                 niobuf->flags = pg->flag;
1137         }
1138
1139         /* size[0] still sizeof (*body) */
1140         if (opc == OST_WRITE) {
1141                 /* 1 RC per niobuf */
1142                 size[1] = sizeof(__u32) * oa_bufs;
1143                 req->rq_replen = lustre_msg_size(2, size);
1144         } else {
1145                 /* 1 RC for the whole I/O */
1146                 req->rq_replen = lustre_msg_size(1, size);
1147         }
1148         err = ptlrpc_queue_wait(req);
1149         LASSERT(err == 0);
1150
1151         ptlrpc_req_finished(req);
1152         return 0;
1153 }
1154
1155 static int mdc_valid_attrs(struct obd_export *exp, struct ll_fid *fid)
1156 {
1157         struct ldlm_res_id res_id = { .name = {0} };
1158         struct obd_device *obd = exp->exp_obd;
1159         struct lustre_handle lockh;
1160         ldlm_policy_data_t policy;
1161         int flags;
1162         ENTRY;
1163
1164         res_id.name[0] = fid->id;
1165         res_id.name[1] = fid->generation;
1166         policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1167
1168         CDEBUG(D_INFO, "trying to match res "LPU64"\n", res_id.name[0]);
1169
1170         /* FIXME use LDLM_FL_TEST_LOCK instead */
1171         flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING;
1172         if (ldlm_lock_match(obd->obd_namespace, flags, &res_id,
1173                             LDLM_IBITS, &policy, LCK_PR, &lockh)) {
1174                 ldlm_lock_decref(&lockh, LCK_PR);
1175                 RETURN(1);
1176         }
1177
1178         if (ldlm_lock_match(obd->obd_namespace, flags, &res_id,
1179                             LDLM_IBITS, &policy, LCK_PW, &lockh)) {
1180                 ldlm_lock_decref(&lockh, LCK_PW);
1181                 RETURN(1);
1182         }
1183         RETURN(0);
1184 }
1185
1186 struct obd_ops mdc_obd_ops = {
1187         o_owner:        THIS_MODULE,
1188         o_attach:       mdc_attach,
1189         o_detach:       mdc_detach,
1190         o_setup:        mdc_setup,
1191         o_precleanup:   mdc_precleanup,
1192         o_cleanup:      mdc_cleanup,
1193         o_connect:      client_connect_import,
1194         o_disconnect:   client_disconnect_export,
1195         o_iocontrol:    mdc_iocontrol,
1196         o_set_info:     mdc_set_info,
1197         o_statfs:       mdc_statfs,
1198         o_pin:          mdc_pin,
1199         o_unpin:        mdc_unpin,
1200         o_llog_init:    mdc_llog_init,
1201         o_llog_finish:  mdc_llog_finish,
1202         o_create:       mdc_obj_create,
1203         o_get_info:     mdc_get_info,
1204         o_brw:          mdc_brw,
1205         o_init_ea_size: mdc_init_ea_size,
1206 };
1207
1208 struct md_ops mdc_md_ops = {
1209         m_getstatus:     mdc_getstatus,
1210         m_getattr:       mdc_getattr,
1211         m_change_cbdata: mdc_change_cbdata,
1212         m_close:         mdc_close,
1213         m_create:        mdc_create,
1214         m_done_writing:  mdc_done_writing,
1215         m_enqueue:       mdc_enqueue,
1216         m_getattr_name:  mdc_getattr_name,
1217         m_intent_lock:   mdc_intent_lock,
1218         m_link:          mdc_link,
1219         m_rename:        mdc_rename,
1220         m_setattr:       mdc_setattr,
1221         m_sync:          mdc_sync,
1222         m_readpage:      mdc_readpage,
1223         m_unlink:        mdc_unlink,
1224         m_valid_attrs:   mdc_valid_attrs,
1225 };
1226
1227 int __init mdc_init(void)
1228 {
1229         struct lprocfs_static_vars lvars;
1230         lprocfs_init_vars(mdc, &lvars);
1231         return class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
1232                                    LUSTRE_MDC_NAME);
1233 }
1234
1235 static void /*__exit*/ mdc_exit(void)
1236 {
1237         class_unregister_type(LUSTRE_MDC_NAME);
1238 }
1239
1240 #ifdef __KERNEL__
1241 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1242 MODULE_DESCRIPTION("Lustre Metadata Client");
1243 MODULE_LICENSE("GPL");
1244
1245 EXPORT_SYMBOL(mdc_req2lustre_md);
1246 EXPORT_SYMBOL(mdc_change_cbdata);
1247 EXPORT_SYMBOL(mdc_getstatus);
1248 EXPORT_SYMBOL(mdc_getattr);
1249 EXPORT_SYMBOL(mdc_getattr_name);
1250 EXPORT_SYMBOL(mdc_create);
1251 EXPORT_SYMBOL(mdc_unlink);
1252 EXPORT_SYMBOL(mdc_rename);
1253 EXPORT_SYMBOL(mdc_link);
1254 EXPORT_SYMBOL(mdc_readpage);
1255 EXPORT_SYMBOL(mdc_setattr);
1256 EXPORT_SYMBOL(mdc_close);
1257 EXPORT_SYMBOL(mdc_done_writing);
1258 EXPORT_SYMBOL(mdc_sync);
1259 EXPORT_SYMBOL(mdc_set_open_replay_data);
1260 EXPORT_SYMBOL(mdc_clear_open_replay_data);
1261 EXPORT_SYMBOL(mdc_store_inode_generation);
1262
1263 module_init(mdc_init);
1264 module_exit(mdc_exit);
1265 #endif