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         if (filename != NULL) {
 200                 LASSERT (strnlen (filename, namelen) == namelen - 1);
 201                 memcpy(lustre_msg_buf(req->rq_reqmsg, 1, namelen),
 202                        filename, namelen);
 203         } else {
 204                 LASSERT(namelen == 1);
 205         }
 206
 207         rc = mdc_getattr_common(exp, ea_size, req);
 208         if (rc != 0) {
 209                 ptlrpc_req_finished (req);
 210                 req = NULL;
 211         }
 212  out:
 213         *request = req;
 214         RETURN(rc);
 215 }
 216
 217 /* This should be called with both the request and the reply still packed. */
 218 void mdc_store_inode_generation(struct ptlrpc_request *req, int reqoff,
 219                                 int repoff)
 220 {
 221         struct mds_rec_create *rec =
 222                 lustre_msg_buf(req->rq_reqmsg, reqoff, sizeof(*rec));
 223         struct mds_body *body =
 224                 lustre_msg_buf(req->rq_repmsg, repoff, sizeof(*body));
 225
 226         LASSERT (rec != NULL);
 227         LASSERT (body != NULL);
 228
 229         memcpy(&rec->cr_replayfid, &body->fid1, sizeof rec->cr_replayfid);
 230         DEBUG_REQ(D_HA, req, "storing generation %u for ino "LPU64,
 231                   rec->cr_replayfid.generation, rec->cr_replayfid.id);
 232 }
 233
 234 int mdc_req2lustre_md(struct ptlrpc_request *req, int offset,
 235                       struct obd_export *exp_osc,
 236                       struct obd_export *exp_mdc,
 237                       struct lustre_md *md)
 238 {
 239         int rc = 0;
 240         ENTRY;
 241
 242         LASSERT(md);
 243         memset(md, 0, sizeof(*md));
 244
 245         md->body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*md->body));
 246         LASSERT (md->body != NULL);
 247         LASSERT_REPSWABBED (req, offset);
 248
 249         if (!(md->body->valid & OBD_MD_FLEASIZE))
 250                 RETURN(0);
 251
 252         /* ea is presented in reply, parse it */
 253         if (S_ISREG(md->body->mode)) {
 254                 int lmmsize;
 255                 struct lov_mds_md *lmm;
 256
 257                 if (md->body->eadatasize == 0) {
 258                         CERROR ("OBD_MD_FLEASIZE set, but eadatasize 0\n");
 259                         RETURN(-EPROTO);
 260                 }
 261                 lmmsize = md->body->eadatasize;
 262                 lmm = lustre_msg_buf(req->rq_repmsg, offset + 1, lmmsize);
 263                 LASSERT (lmm != NULL);
 264                 LASSERT_REPSWABBED (req, offset + 1);
 265
 266                 rc = obd_unpackmd(exp_osc, &md->lsm, lmm, lmmsize);
 267                 if (rc >= 0) {
 268                         LASSERT (rc >= sizeof (*md->lsm));
 269                         rc = 0;
 270                 }
 271         } else if (S_ISDIR(md->body->mode)) {
 272                 struct mea *mea;
 273                 int mdsize;
 274                 LASSERT(exp_mdc != NULL);
 275                 /* dir can be non-splitted */
 276                 if (md->body->eadatasize == 0)
 277                         RETURN(0);
 278
 279                 mdsize = md->body->eadatasize;
 280                 mea = lustre_msg_buf(req->rq_repmsg, offset + 1, mdsize);
 281                 LASSERT(mea != NULL);
 282
 283                 rc = obd_unpackmd(exp_mdc, (void *) &md->mea,
 284                                   (void *) mea, mdsize);
 285                 if (rc >= 0) {
 286                         LASSERT (rc >= sizeof (*md->mea));
 287                         rc = 0;
 288                 }
 289         } else {
 290                 LASSERT(0);
 291         }
 292         RETURN(rc);
 293 }
 294
 295 static void mdc_commit_open(struct ptlrpc_request *req)
 296 {
 297         struct mdc_open_data *mod = req->rq_cb_data;
 298         if (mod == NULL)
 299                 return;
 300
 301         if (mod->mod_close_req != NULL)
 302                 mod->mod_close_req->rq_cb_data = NULL;
 303
 304         if (mod->mod_och != NULL)
 305                 mod->mod_och->och_mod = NULL;
 306
 307         OBD_FREE(mod, sizeof(*mod));
 308         req->rq_cb_data = NULL;
 309 }
 310
 311 static void mdc_replay_open(struct ptlrpc_request *req)
 312 {
 313         struct mdc_open_data *mod = req->rq_cb_data;
 314         struct obd_client_handle *och;
 315         struct ptlrpc_request *close_req;
 316         struct lustre_handle old;
 317         struct mds_body *body;
 318         ENTRY;
 319
 320         body = lustre_swab_repbuf(req, 1, sizeof(*body), lustre_swab_mds_body);
 321         LASSERT (body != NULL);
 322
 323         if (mod == NULL) {
 324                 DEBUG_REQ(D_ERROR, req,
 325                           "can't properly replay without open data");
 326                 EXIT;
 327                 return;
 328         }
 329
 330         och = mod->mod_och;
 331         if (och != NULL) {
 332                 struct lustre_handle *file_fh;
 333                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 334                 file_fh = &och->och_fh;
 335                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 336                        file_fh->cookie, body->handle.cookie);
 337                 memcpy(&old, file_fh, sizeof(old));
 338                 memcpy(file_fh, &body->handle, sizeof(*file_fh));
 339         }
 340
 341         close_req = mod->mod_close_req;
 342         if (close_req != NULL) {
 343                 struct mds_body *close_body;
 344                 LASSERT(close_req->rq_reqmsg->opc == MDS_CLOSE);
 345                 close_body = lustre_msg_buf(close_req->rq_reqmsg, 0,
 346                                             sizeof(*close_body));
 347                 if (och != NULL)
 348                         LASSERT(!memcmp(&old, &close_body->handle, sizeof old));
 349                 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
 350                 memcpy(&close_body->handle, &body->handle,
 351                        sizeof(close_body->handle));
 352         }
 353
 354         EXIT;
 355 }
 356
 357 void mdc_set_open_replay_data(struct obd_client_handle *och,
 358                               struct ptlrpc_request *open_req)
 359 {
 360         struct mdc_open_data *mod;
 361         struct mds_rec_create *rec =
 362                 lustre_msg_buf(open_req->rq_reqmsg, 2, sizeof(*rec));
 363         struct mds_body *body =
 364                 lustre_msg_buf(open_req->rq_repmsg, 1, sizeof(*body));
 365
 366         LASSERT(rec != NULL);
 367         /* outgoing messages always in my byte order */
 368         LASSERT(body != NULL);
 369         /* incoming message in my byte order (it's been swabbed) */
 370         LASSERT_REPSWABBED(open_req, 1);
 371
 372         OBD_ALLOC(mod, sizeof(*mod));
 373         if (mod == NULL) {
 374                 DEBUG_REQ(D_ERROR, open_req, "can't allocate mdc_open_data");
 375                 return;
 376         }
 377
 378         och->och_mod = mod;
 379         mod->mod_och = och;
 380         mod->mod_open_req = open_req;
 381
 382         memcpy(&rec->cr_replayfid, &body->fid1, sizeof rec->cr_replayfid);
 383         open_req->rq_replay_cb = mdc_replay_open;
 384         open_req->rq_commit_cb = mdc_commit_open;
 385         open_req->rq_cb_data = mod;
 386         DEBUG_REQ(D_HA, open_req, "set up replay data");
 387 }
 388
 389 void mdc_clear_open_replay_data(struct obd_client_handle *och)
 390 {
 391         struct mdc_open_data *mod = och->och_mod;
 392
 393         /* Don't free the structure now (it happens in mdc_commit_open, after
 394          * we're sure we won't need to fix up the close request in the future),
 395          * but make sure that replay doesn't poke at the och, which is about to
 396          * be freed. */
 397         LASSERT(mod != (void *)0x5a5a5a5a);
 398         if (mod != NULL)
 399                 mod->mod_och = NULL;
 400         och->och_mod = NULL;
 401 }
 402
 403 static void mdc_commit_close(struct ptlrpc_request *req)
 404 {
 405         struct mdc_open_data *mod = req->rq_cb_data;
 406         struct ptlrpc_request *open_req;
 407         struct obd_import *imp = req->rq_import;
 408
 409         DEBUG_REQ(D_HA, req, "close req committed");
 410         if (mod == NULL)
 411                 return;
 412
 413         mod->mod_close_req = NULL;
 414         req->rq_cb_data = NULL;
 415         req->rq_commit_cb = NULL;
 416
 417         open_req = mod->mod_open_req;
 418         LASSERT(open_req != NULL);
 419         LASSERT(open_req != (void *)0x5a5a5a5a);
 420
 421         DEBUG_REQ(D_HA, open_req, "open req balanced");
 422         LASSERT(open_req->rq_transno != 0);
 423         LASSERT(open_req->rq_import == imp);
 424
 425         /* We no longer want to preserve this for transno-unconditional
 426          * replay. */
 427         spin_lock(&open_req->rq_lock);
 428         open_req->rq_replay = 0;
 429         spin_unlock(&open_req->rq_lock);
 430 }
 431
 432 static int mdc_close_interpret(struct ptlrpc_request *req, void *data, int rc)
 433 {
 434         union ptlrpc_async_args *aa = data;
 435         struct mdc_rpc_lock *rpc_lock = aa->pointer_arg[0];
 436         struct obd_device *obd = aa->pointer_arg[1];
 437
 438         if (rpc_lock == NULL) {
 439                 CERROR("called with NULL rpc_lock\n");
 440         } else {
 441                 mdc_put_rpc_lock(rpc_lock, NULL);
 442                 LASSERTF(req->rq_async_args.pointer_arg[0] ==
 443                          obd->u.cli.cl_rpc_lock, "%p != %p\n",
 444                          req->rq_async_args.pointer_arg[0],
 445                          obd->u.cli.cl_rpc_lock);
 446                 aa->pointer_arg[0] = NULL;
 447         }
 448         wake_up(&req->rq_reply_waitq);
 449         RETURN(rc);
 450 }
 451
 452 /* We can't use ptlrpc_check_reply, because we don't want to wake up for
 453  * anything but a reply or an error. */
 454 static int mdc_close_check_reply(struct ptlrpc_request *req)
 455 {
 456         int rc = 0;
 457         unsigned long flags;
 458
 459         spin_lock_irqsave(&req->rq_lock, flags);
 460         if (PTLRPC_REQUEST_COMPLETE(req)) {
 461                 rc = 1;
 462         }
 463         spin_unlock_irqrestore (&req->rq_lock, flags);
 464         return rc;
 465 }
 466
 467 static int go_back_to_sleep(void *unused)
 468 {
 469         return 0;
 470 }
 471
 472 int mdc_close(struct obd_export *exp, struct obdo *obdo,
 473               struct obd_client_handle *och, struct ptlrpc_request **request)
 474 {
 475         struct mds_body *body;
 476         struct obd_device *obd = class_exp2obd(exp);
 477         int reqsize = sizeof(*body);
 478         int rc, repsize[3] = {sizeof(*body),
 479                               obd->u.cli.cl_max_mds_easize,
 480                               obd->u.cli.cl_max_mds_cookiesize};
 481         struct ptlrpc_request *req;
 482         struct mdc_open_data *mod;
 483         struct l_wait_info lwi;
 484         ENTRY;
 485
 486         req = ptlrpc_prep_req(class_exp2cliimp(exp), MDS_CLOSE, 1, &reqsize,
 487                               NULL);
 488         if (req == NULL)
 489                 GOTO(out, rc = -ENOMEM);
 490
 491         /* Ensure that this close's handle is fixed up during replay. */
 492         LASSERT(och != NULL);
 493         mod = och->och_mod;
 494         if (likely(mod != NULL)) {
 495                 mod->mod_close_req = req;
 496                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open req %p",
 497                           mod->mod_open_req);
 498         } else {
 499                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 500         }
 501
 502         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
 503         mdc_pack_fid(&body->fid1, obdo->o_id, 0, obdo->o_mode);
 504         memcpy(&body->handle, &och->och_fh, sizeof(body->handle));
 505         body->size = obdo->o_size;
 506         body->blocks = obdo->o_blocks;
 507         body->flags = obdo->o_flags;
 508         body->valid = obdo->o_valid;
 509
 510         req->rq_replen = lustre_msg_size(3, repsize);
 511         req->rq_commit_cb = mdc_commit_close;
 512         LASSERT(req->rq_cb_data == NULL);
 513         req->rq_cb_data = mod;
 514
 515         /* We hand a ref to the rpcd here, so we need another one of our own. */
 516         ptlrpc_request_addref(req);
 517
 518         mdc_get_rpc_lock(obd->u.cli.cl_rpc_lock, NULL);
 519         req->rq_interpret_reply = mdc_close_interpret;
 520         req->rq_async_args.pointer_arg[0] = obd->u.cli.cl_rpc_lock;
 521         req->rq_async_args.pointer_arg[1] = obd;
 522         ptlrpcd_add_req(req);
 523         lwi = LWI_TIMEOUT_INTR(MAX(req->rq_timeout * HZ, 1), go_back_to_sleep,
 524                                NULL, NULL);
 525         rc = l_wait_event(req->rq_reply_waitq, mdc_close_check_reply(req),
 526                           &lwi);
 527         if (rc == 0) {
 528                 rc = req->rq_repmsg->status;
 529                 if (req->rq_repmsg->type == PTL_RPC_MSG_ERR) {
 530                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
 531                                   "= %d", rc);
 532                         if (rc > 0)
 533                                 rc = -rc;
 534                 } else if (mod == NULL) {
 535                         CERROR("Unexpected: can't find mdc_open_data, but the "
 536                                "close succeeded.  Please tell CFS.\n");
 537                 }
 538                 if (!lustre_swab_repbuf(req, 0, sizeof(struct mds_body),
 539                                         lustre_swab_mds_body)) {
 540                         CERROR("Error unpacking mds_body\n");
 541                         rc = -EPROTO;
 542                 }
 543         }
 544         if (req->rq_async_args.pointer_arg[0] != NULL) {
 545                 CERROR("returned without dropping rpc_lock: rc %d\n", rc);
 546                 mdc_close_interpret(req, &req->rq_async_args, rc);
 547                 portals_debug_dumplog();
 548         }
 549
 550         EXIT;
 551  out:
 552         *request = req;
 553         return rc;
 554 }
 555
 556 int mdc_done_writing(struct obd_export *exp, struct obdo *obdo)
 557 {
 558         struct ptlrpc_request *req;
 559         struct mds_body *body;
 560         int rc, size = sizeof(*body);
 561         ENTRY;
 562
 563         req = ptlrpc_prep_req(class_exp2cliimp(exp), MDS_DONE_WRITING, 1,
 564                               &size, NULL);
 565         if (req == NULL)
 566                 RETURN(-ENOMEM);
 567
 568         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
 569         mdc_pack_fid(&body->fid1, obdo->o_id, 0, obdo->o_mode);
 570         body->size = obdo->o_size;
 571         body->blocks = obdo->o_blocks;
 572         body->flags = obdo->o_flags;
 573         body->valid = obdo->o_valid;
 574 //        memcpy(&body->handle, &och->och_fh, sizeof(body->handle));
 575
 576         req->rq_replen = lustre_msg_size(1, &size);
 577
 578         rc = ptlrpc_queue_wait(req);
 579         ptlrpc_req_finished(req);
 580         RETURN(rc);
 581 }
 582
 583 int mdc_readpage(struct obd_export *exp, struct ll_fid *mdc_fid,
 584                  __u64 offset, struct page *page,
 585                  struct ptlrpc_request **request)
 586 {
 587         struct obd_import *imp = class_exp2cliimp(exp);
 588         struct ptlrpc_request *req = NULL;
 589         struct ptlrpc_bulk_desc *desc = NULL;
 590         struct mds_body *body;
 591         int rc, size = sizeof(*body);
 592         ENTRY;
 593
 594         CDEBUG(D_INODE, "inode: %ld\n", (long)mdc_fid->id);
 595
 596         req = ptlrpc_prep_req(imp, MDS_READPAGE, 1, &size, NULL);
 597         if (req == NULL)
 598                 GOTO(out, rc = -ENOMEM);
 599         /* XXX FIXME bug 249 */
 600         req->rq_request_portal = MDS_READPAGE_PORTAL;
 601
 602         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_PUT_SINK, MDS_BULK_PORTAL);
 603         if (desc == NULL)
 604                 GOTO(out, rc = -ENOMEM);
 605         /* NB req now owns desc and will free it when it gets freed */
 606
 607         ptlrpc_prep_bulk_page(desc, page, 0, PAGE_CACHE_SIZE);
 608
 609         mdc_readdir_pack(req, offset, PAGE_CACHE_SIZE, mdc_fid);
 610
 611         req->rq_replen = lustre_msg_size(1, &size);
 612         rc = ptlrpc_queue_wait(req);
 613
 614         if (rc == 0) {
 615                 body = lustre_swab_repbuf(req, 0, sizeof (*body),
 616                                           lustre_swab_mds_body);
 617                 if (body == NULL) {
 618                         CERROR("Can't unpack mds_body\n");
 619                         GOTO(out, rc = -EPROTO);
 620                 }
 621
 622                 if (req->rq_bulk->bd_nob_transferred != PAGE_CACHE_SIZE) {
 623                         CERROR ("Unexpected # bytes transferred: %d"
 624                                 " (%ld expected)\n",
 625                                 req->rq_bulk->bd_nob_transferred,
 626                                 PAGE_CACHE_SIZE);
 627                         GOTO (out, rc = -EPROTO);
 628                 }
 629         }
 630
 631         EXIT;
 632  out:
 633         *request = req;
 634         return rc;
 635 }
 636
 637 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 638                          void *karg, void *uarg)
 639 {
 640         struct obd_device *obd = exp->exp_obd;
 641         struct obd_ioctl_data *data = karg;
 642         struct obd_import *imp = obd->u.cli.cl_import;
 643         struct llog_ctxt *ctxt;
 644         int rc;
 645         ENTRY;
 646
 647         MOD_INC_USE_COUNT;
 648
 649         switch (cmd) {
 650         case OBD_IOC_CLIENT_RECOVER:
 651                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1);
 652                 if (rc < 0)
 653                         GOTO(out, rc);
 654                 GOTO(out, rc = 0);
 655         case IOC_OSC_SET_ACTIVE:
 656                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
 657                 GOTO(out, rc);
 658         case OBD_IOC_PARSE: {
 659                 ctxt = llog_get_context(&exp->exp_obd->obd_llogs,
 660                                         LLOG_CONFIG_REPL_CTXT);
 661                 rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
 662                 GOTO(out, rc);
 663         }
 664 #ifdef __KERNEL__
 665         case OBD_IOC_LLOG_INFO:
 666         case OBD_IOC_LLOG_PRINT: {
 667                 ctxt = llog_get_context(&obd->obd_llogs, LLOG_CONFIG_REPL_CTXT);
 668                 rc = llog_ioctl(ctxt, cmd, data);
 669
 670                 GOTO(out, rc);
 671         }
 672 #endif
 673         default:
 674                 CERROR("osc_ioctl(): unrecognised ioctl %#x\n", cmd);
 675                 GOTO(out, rc = -ENOTTY);
 676         }
 677 out:
 678         MOD_DEC_USE_COUNT;
 679         return rc;
 680 }
 681
 682 int mdc_set_info(struct obd_export *exp, obd_count keylen,
 683                  void *key, obd_count vallen, void *val)
 684 {
 685         int rc = -EINVAL;
 686
 687         if (keylen == strlen("initial_recov") &&
 688             memcmp(key, "initial_recov", strlen("initial_recov")) == 0) {
 689                 struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
 690                 if (vallen != sizeof(int))
 691                         RETURN(-EINVAL);
 692                 imp->imp_initial_recov = *(int *)val;
 693                 CDEBUG(D_HA, "%s: set imp_no_init_recov = %d\n",
 694                        exp->exp_obd->obd_name,
 695                        imp->imp_initial_recov);
 696                 RETURN(0);
 697         } else if (keylen >= strlen("client") && strcmp(key, "client") == 0) {
 698                 struct ptlrpc_request *req;
 699                 char *bufs[1] = {key};
 700                 int rc;
 701                 req = ptlrpc_prep_req(class_exp2cliimp(exp), OST_SET_INFO, 1,
 702                                       &keylen, bufs);
 703                 if (req == NULL)
 704                         RETURN(-ENOMEM);
 705
 706                 req->rq_replen = lustre_msg_size(0, NULL);
 707                 rc = ptlrpc_queue_wait(req);
 708                 ptlrpc_req_finished(req);
 709                 RETURN(rc);
 710         }
 711
 712         RETURN(rc);
 713 }
 714
 715 static int mdc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
 716                       unsigned long max_age)
 717 {
 718         struct ptlrpc_request *req;
 719         struct obd_statfs *msfs;
 720         int rc, size = sizeof(*msfs);
 721         ENTRY;
 722
 723         /* We could possibly pass max_age in the request (as an absolute
 724          * timestamp or a "seconds.usec ago") so the target can avoid doing
 725          * extra calls into the filesystem if that isn't necessary (e.g.
 726          * during mount that would help a bit).  Having relative timestamps
 727          * is not so great if request processing is slow, while absolute
 728          * timestamps are not ideal because they need time synchronization. */
 729         req = ptlrpc_prep_req(obd->u.cli.cl_import, MDS_STATFS, 0, NULL, NULL);
 730         if (!req)
 731                 RETURN(-ENOMEM);
 732
 733         req->rq_replen = lustre_msg_size(1, &size);
 734
 735         mdc_get_rpc_lock(obd->u.cli.cl_rpc_lock, NULL);
 736         rc = ptlrpc_queue_wait(req);
 737         mdc_put_rpc_lock(obd->u.cli.cl_rpc_lock, NULL);
 738
 739         if (rc)
 740                 GOTO(out, rc);
 741
 742         msfs = lustre_swab_repbuf(req, 0, sizeof(*msfs),lustre_swab_obd_statfs);
 743         if (msfs == NULL) {
 744                 CERROR("Can't unpack obd_statfs\n");
 745                 GOTO(out, rc = -EPROTO);
 746         }
 747
 748         memcpy(osfs, msfs, sizeof (*msfs));
 749         EXIT;
 750 out:
 751         ptlrpc_req_finished(req);
 752
 753         return rc;
 754 }
 755
 756 static int mdc_pin(struct obd_export *exp, obd_id ino, __u32 gen, int type,
 757                    struct obd_client_handle *handle, int flag)
 758 {
 759         struct ptlrpc_request *req;
 760         struct mds_body *body;
 761         int rc, size = sizeof(*body);
 762         ENTRY;
 763
 764         req = ptlrpc_prep_req(class_exp2cliimp(exp), MDS_PIN, 1, &size, NULL);
 765         if (req == NULL)
 766                 RETURN(-ENOMEM);
 767
 768         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
 769         mdc_pack_fid(&body->fid1, ino, gen, type);
 770         body->flags = flag;
 771
 772         req->rq_replen = lustre_msg_size(1, &size);
 773
 774         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 775         rc = ptlrpc_queue_wait(req);
 776         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 777         if (rc) {
 778                 CERROR("pin failed: %d\n", rc);
 779                 ptlrpc_req_finished(req);
 780                 RETURN(rc);
 781         }
 782
 783         body = lustre_swab_repbuf(req, 0, sizeof(*body), lustre_swab_mds_body);
 784         if (body == NULL) {
 785                 ptlrpc_req_finished(req);
 786                 RETURN(rc);
 787         }
 788
 789         memcpy(&handle->och_fh, &body->handle, sizeof(body->handle));
 790         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
 791
 792         OBD_ALLOC(handle->och_mod, sizeof(*handle->och_mod));
 793         if (handle->och_mod == NULL) {
 794                 DEBUG_REQ(D_ERROR, req, "can't allocate mdc_open_data");
 795                 RETURN(-ENOMEM);
 796         }
 797         handle->och_mod->mod_open_req = req; /* will be dropped by unpin */
 798
 799         RETURN(rc);
 800 }
 801
 802 static int mdc_unpin(struct obd_export *exp,
 803                      struct obd_client_handle *handle, int flag)
 804 {
 805         struct ptlrpc_request *req;
 806         struct mds_body *body;
 807         int rc, size = sizeof(*body);
 808         ENTRY;
 809
 810         if (handle->och_magic != OBD_CLIENT_HANDLE_MAGIC)
 811                 RETURN(0);
 812
 813         req = ptlrpc_prep_req(class_exp2cliimp(exp), MDS_CLOSE, 1, &size, NULL);
 814         if (req == NULL)
 815                 RETURN(-ENOMEM);
 816
 817         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
 818         memcpy(&body->handle, &handle->och_fh, sizeof(body->handle));
 819         body->flags = flag;
 820
 821         req->rq_replen = lustre_msg_size(0, NULL);
 822         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 823         rc = ptlrpc_queue_wait(req);
 824         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 825
 826         if (rc != 0)
 827                 CERROR("unpin failed: %d\n", rc);
 828
 829         ptlrpc_req_finished(req);
 830         ptlrpc_req_finished(handle->och_mod->mod_open_req);
 831         OBD_FREE(handle->och_mod, sizeof(*handle->och_mod));
 832         RETURN(rc);
 833 }
 834
 835 int mdc_sync(struct obd_export *exp, struct ll_fid *fid,
 836              struct ptlrpc_request **request)
 837 {
 838         struct ptlrpc_request *req;
 839         struct mds_body *body;
 840         int size = sizeof(*body);
 841         int rc;
 842         ENTRY;
 843
 844         req = ptlrpc_prep_req(class_exp2cliimp(exp), MDS_SYNC, 1,&size,NULL);
 845         if (!req)
 846                 RETURN(rc = -ENOMEM);
 847
 848         if (fid) {
 849                 body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
 850                 memcpy(&body->fid1, fid, sizeof(*fid));
 851                 mdc_pack_req_body(req);
 852         }
 853
 854         req->rq_replen = lustre_msg_size(1, &size);
 855
 856         rc = ptlrpc_queue_wait(req);
 857         if (rc || request == NULL)
 858                 ptlrpc_req_finished(req);
 859         else
 860                 *request = req;
 861
 862         RETURN(rc);
 863 }
 864
 865 static int mdc_attach(struct obd_device *dev, obd_count len, void *data)
 866 {
 867         struct lprocfs_static_vars lvars;
 868
 869         lprocfs_init_vars(mdc, &lvars);
 870         return lprocfs_obd_attach(dev, lvars.obd_vars);
 871 }
 872
 873 static int mdc_detach(struct obd_device *dev)
 874 {
 875         return lprocfs_obd_detach(dev);
 876 }
 877
 878 static int mdc_import_event(struct obd_device *obd,
 879                             struct obd_import *imp,
 880                             enum obd_import_event event)
 881 {
 882         int rc = 0;
 883
 884         LASSERT(imp->imp_obd == obd);
 885
 886         switch (event) {
 887         case IMP_EVENT_DISCON: {
 888                 break;
 889         }
 890         case IMP_EVENT_INACTIVE: {
 891                 if (obd->obd_observer)
 892                         rc = obd_notify(obd->obd_observer, obd, 0);
 893                 break;
 894         }
 895         case IMP_EVENT_INVALIDATE: {
 896                 struct ldlm_namespace *ns = obd->obd_namespace;
 897
 898                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
 899
 900                 break;
 901         }
 902         case IMP_EVENT_ACTIVE: {
 903                 if (obd->obd_observer)
 904                         rc = obd_notify(obd->obd_observer, obd, 1);
 905                 break;
 906         }
 907         default:
 908                 CERROR("Unknown import event %d\n", event);
 909                 LBUG();
 910         }
 911         RETURN(rc);
 912 }
 913
 914 static int mdc_setup(struct obd_device *obd, obd_count len, void *buf)
 915 {
 916         struct client_obd *cli = &obd->u.cli;
 917         int rc;
 918         ENTRY;
 919
 920         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
 921         if (!cli->cl_rpc_lock)
 922                 RETURN(-ENOMEM);
 923         mdc_init_rpc_lock(cli->cl_rpc_lock);
 924
 925         ptlrpcd_addref();
 926
 927         OBD_ALLOC(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
 928         if (!cli->cl_setattr_lock)
 929                 GOTO(out_free_rpc, rc = -ENOMEM);
 930         mdc_init_rpc_lock(cli->cl_setattr_lock);
 931
 932         rc = client_obd_setup(obd, len, buf);
 933         if (rc) {
 934                 OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
 935  out_free_rpc:
 936                 OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
 937         }
 938
 939         rc = obd_llog_init(obd, &obd->obd_llogs, obd, 0, NULL);
 940         if (rc) {
 941                 mdc_cleanup(obd, 0);
 942                 CERROR("failed to setup llogging subsystems\n");
 943         }
 944
 945         RETURN(rc);
 946 }
 947
 948 int mdc_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
 949 {
 950         struct obd_device *obd = exp->exp_obd;
 951         struct client_obd *cli = &obd->u.cli;
 952         ENTRY;
 953
 954         if (cli->cl_max_mds_easize < easize)
 955                 cli->cl_max_mds_easize = easize;
 956         if (cli->cl_max_mds_cookiesize < cookiesize)
 957                 cli->cl_max_mds_cookiesize = cookiesize;
 958         RETURN(0);
 959 }
 960
 961 static int mdc_precleanup(struct obd_device *obd, int flags)
 962 {
 963         int rc = 0;
 964
 965         rc = obd_llog_finish(obd, &obd->obd_llogs, 0);
 966         if (rc != 0)
 967                 CERROR("failed to cleanup llogging subsystems\n");
 968
 969         RETURN(rc);
 970 }
 971
 972 static int mdc_cleanup(struct obd_device *obd, int flags)
 973 {
 974         struct client_obd *cli = &obd->u.cli;
 975
 976         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
 977         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
 978
 979         ptlrpcd_decref();
 980
 981         return client_obd_cleanup(obd, flags);
 982 }
 983
 984
 985 static int mdc_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
 986                          struct obd_device *tgt, int count,
 987                          struct llog_catid *logid)
 988 {
 989         struct llog_ctxt *ctxt;
 990         int rc;
 991         ENTRY;
 992
 993         rc = llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
 994                         &llog_client_ops);
 995         if (rc == 0) {
 996                 ctxt = llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT);
 997                 ctxt->loc_imp = obd->u.cli.cl_import;
 998         }
 999
1000         RETURN(rc);
1001 }
1002
1003 static int mdc_llog_finish(struct obd_device *obd,
1004                            struct obd_llogs *llogs, int count)
1005 {
1006         int rc;
1007         ENTRY;
1008
1009         rc = llog_cleanup(llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT));
1010         RETURN(rc);
1011 }
1012
1013 int mdc_obj_create(struct obd_export *exp, struct obdo *oa,
1014                     struct lov_stripe_md **ea, struct obd_trans_info *oti)
1015 {
1016         struct ptlrpc_request *request;
1017         struct ost_body *body;
1018         int rc, size = sizeof(*body);
1019         ENTRY;
1020
1021         LASSERT(oa);
1022
1023         request = ptlrpc_prep_req(class_exp2cliimp(exp), OST_CREATE,
1024                                   1, &size, NULL);
1025         if (!request)
1026                 GOTO(out_req, rc = -ENOMEM);
1027
1028         body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
1029         memcpy(&body->oa, oa, sizeof(body->oa));
1030
1031         request->rq_replen = lustre_msg_size(1, &size);
1032         rc = ptlrpc_queue_wait(request);
1033         if (rc)
1034                 GOTO(out_req, rc);
1035
1036         body = lustre_swab_repbuf(request, 0, sizeof(*body),
1037                                   lustre_swab_ost_body);
1038         if (body == NULL) {
1039                 CERROR ("can't unpack ost_body\n");
1040                 GOTO (out_req, rc = -EPROTO);
1041         }
1042
1043         memcpy(oa, &body->oa, sizeof(*oa));
1044
1045         /* store ino/generation for recovery */
1046         body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
1047         body->oa.o_id = oa->o_id;
1048         body->oa.o_generation = oa->o_generation;
1049
1050         CDEBUG(D_HA, "transno: "LPD64"\n", request->rq_repmsg->transno);
1051         EXIT;
1052 out_req:
1053         ptlrpc_req_finished(request);
1054         return rc;
1055 }
1056
1057 static int mdc_get_info(struct obd_export *exp, obd_count keylen,
1058                         void *key, __u32 *vallen, void *val)
1059 {
1060         ENTRY;
1061         if (!vallen || !val)
1062                 RETURN(-EFAULT);
1063
1064         if (keylen >= strlen("mdsize") && strcmp(key, "mdsize") == 0) {
1065                 struct ptlrpc_request *req;
1066                 __u32 *reply;
1067                 char *bufs[1] = {key};
1068                 int rc;
1069                 req = ptlrpc_prep_req(class_exp2cliimp(exp), OST_GET_INFO, 1,
1070                                       &keylen, bufs);
1071                 if (req == NULL)
1072                         RETURN(-ENOMEM);
1073
1074                 req->rq_replen = lustre_msg_size(1, vallen);
1075                 rc = ptlrpc_queue_wait(req);
1076                 if (rc)
1077                         GOTO(out, rc);
1078
1079                 /* FIXME: right swap routine here! */
1080                 reply = lustre_swab_repbuf(req, 0, sizeof(*reply), NULL);
1081                 if (reply == NULL) {
1082                         CERROR("Can't unpack mdsize\n");
1083                         GOTO(out, rc = -EPROTO);
1084                 }
1085                 *((__u32 *)val) = *reply;
1086         out:
1087                 ptlrpc_req_finished(req);
1088                 RETURN(rc);
1089         }
1090         RETURN(-EINVAL);
1091 }
1092
1093 int mdc_brw(int rw, struct obd_export *exp, struct obdo *oa,
1094                 struct lov_stripe_md *ea, obd_count oa_bufs,
1095                 struct brw_page *pgarr, struct obd_trans_info *oti)
1096 {
1097         struct ptlrpc_bulk_desc *desc;
1098         struct niobuf_remote *niobuf;
1099         struct ptlrpc_request *req;
1100         struct obd_ioobj *ioobj;
1101         struct ost_body *body;
1102         int err, opc, i;
1103         int size[3];
1104
1105         opc = ((rw & OBD_BRW_WRITE) != 0) ? OST_WRITE : OST_READ;
1106
1107         size[0] = sizeof(*body);
1108         size[1] = sizeof(*ioobj);
1109         size[2] = oa_bufs * sizeof(*niobuf);
1110
1111         req = ptlrpc_prep_req(class_exp2cliimp(exp), opc, 3, size, NULL);
1112         LASSERT(req != NULL);
1113
1114         if (opc == OST_WRITE)
1115                 desc = ptlrpc_prep_bulk_imp(req, oa_bufs, BULK_GET_SOURCE,
1116                                             OST_BULK_PORTAL);
1117         else
1118                 desc = ptlrpc_prep_bulk_imp(req, oa_bufs, BULK_PUT_SINK,
1119                                             OST_BULK_PORTAL);
1120         LASSERT(desc != NULL);
1121
1122         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
1123         ioobj = lustre_msg_buf(req->rq_reqmsg, 1, sizeof(*ioobj));
1124         niobuf = lustre_msg_buf(req->rq_reqmsg, 2, oa_bufs * sizeof(*niobuf));
1125
1126         memcpy(&body->oa, oa, sizeof(*oa));
1127         obdo_to_ioobj(oa, ioobj);
1128         ioobj->ioo_bufcnt = oa_bufs;
1129
1130         for (i = 0; i < oa_bufs; i++, niobuf++) {
1131                 struct brw_page *pg = &pgarr[i];
1132
1133                 LASSERT(pg->count > 0);
1134                 LASSERT((pg->off & ~PAGE_MASK) + pg->count <= PAGE_SIZE);
1135
1136                 ptlrpc_prep_bulk_page(desc, pg->pg, pg->off & ~PAGE_MASK,
1137                                       pg->count);
1138
1139                 niobuf->offset = pg->off;
1140                 niobuf->len = pg->count;
1141                 niobuf->flags = pg->flag;
1142         }
1143
1144         /* size[0] still sizeof (*body) */
1145         if (opc == OST_WRITE) {
1146                 /* 1 RC per niobuf */
1147                 size[1] = sizeof(__u32) * oa_bufs;
1148                 req->rq_replen = lustre_msg_size(2, size);
1149         } else {
1150                 /* 1 RC for the whole I/O */
1151                 req->rq_replen = lustre_msg_size(1, size);
1152         }
1153         err = ptlrpc_queue_wait(req);
1154         LASSERT(err == 0);
1155
1156         ptlrpc_req_finished(req);
1157         return 0;
1158 }
1159
1160 static int mdc_valid_attrs(struct obd_export *exp, struct ll_fid *fid)
1161 {
1162         struct ldlm_res_id res_id = { .name = {0} };
1163         struct obd_device *obd = exp->exp_obd;
1164         struct lustre_handle lockh;
1165         ldlm_policy_data_t policy;
1166         int flags;
1167         ENTRY;
1168
1169         res_id.name[0] = fid->id;
1170         res_id.name[1] = fid->generation;
1171         policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1172
1173         CDEBUG(D_INFO, "trying to match res "LPU64"\n", res_id.name[0]);
1174
1175         /* FIXME use LDLM_FL_TEST_LOCK instead */
1176         flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING;
1177         if (ldlm_lock_match(obd->obd_namespace, flags, &res_id,
1178                             LDLM_IBITS, &policy, LCK_PR, &lockh)) {
1179                 ldlm_lock_decref(&lockh, LCK_PR);
1180                 RETURN(1);
1181         }
1182
1183         if (ldlm_lock_match(obd->obd_namespace, flags, &res_id,
1184                             LDLM_IBITS, &policy, LCK_PW, &lockh)) {
1185                 ldlm_lock_decref(&lockh, LCK_PW);
1186                 RETURN(1);
1187         }
1188         RETURN(0);
1189 }
1190
1191 struct obd_ops mdc_obd_ops = {
1192         o_owner:        THIS_MODULE,
1193         o_attach:       mdc_attach,
1194         o_detach:       mdc_detach,
1195         o_setup:        mdc_setup,
1196         o_precleanup:   mdc_precleanup,
1197         o_cleanup:      mdc_cleanup,
1198         o_connect:      client_connect_import,
1199         o_disconnect:   client_disconnect_export,
1200         o_iocontrol:    mdc_iocontrol,
1201         o_set_info:     mdc_set_info,
1202         o_statfs:       mdc_statfs,
1203         o_pin:          mdc_pin,
1204         o_unpin:        mdc_unpin,
1205         o_llog_init:    mdc_llog_init,
1206         o_llog_finish:  mdc_llog_finish,
1207         o_create:       mdc_obj_create,
1208         o_get_info:     mdc_get_info,
1209         o_brw:          mdc_brw,
1210         o_init_ea_size: mdc_init_ea_size,
1211 };
1212
1213 struct md_ops mdc_md_ops = {
1214         m_getstatus:     mdc_getstatus,
1215         m_getattr:       mdc_getattr,
1216         m_change_cbdata: mdc_change_cbdata,
1217         m_close:         mdc_close,
1218         m_create:        mdc_create,
1219         m_done_writing:  mdc_done_writing,
1220         m_enqueue:       mdc_enqueue,
1221         m_getattr_name:  mdc_getattr_name,
1222         m_intent_lock:   mdc_intent_lock,
1223         m_link:          mdc_link,
1224         m_rename:        mdc_rename,
1225         m_setattr:       mdc_setattr,
1226         m_sync:          mdc_sync,
1227         m_readpage:      mdc_readpage,
1228         m_unlink:        mdc_unlink,
1229         m_valid_attrs:   mdc_valid_attrs,
1230 };
1231
1232 int __init mdc_init(void)
1233 {
1234         struct lprocfs_static_vars lvars;
1235         lprocfs_init_vars(mdc, &lvars);
1236         return class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
1237                                    LUSTRE_MDC_NAME);
1238 }
1239
1240 static void /*__exit*/ mdc_exit(void)
1241 {
1242         class_unregister_type(LUSTRE_MDC_NAME);
1243 }
1244
1245 #ifdef __KERNEL__
1246 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1247 MODULE_DESCRIPTION("Lustre Metadata Client");
1248 MODULE_LICENSE("GPL");
1249
1250 EXPORT_SYMBOL(mdc_req2lustre_md);
1251 EXPORT_SYMBOL(mdc_change_cbdata);
1252 EXPORT_SYMBOL(mdc_getstatus);
1253 EXPORT_SYMBOL(mdc_getattr);
1254 EXPORT_SYMBOL(mdc_getattr_name);
1255 EXPORT_SYMBOL(mdc_create);
1256 EXPORT_SYMBOL(mdc_unlink);
1257 EXPORT_SYMBOL(mdc_rename);
1258 EXPORT_SYMBOL(mdc_link);
1259 EXPORT_SYMBOL(mdc_readpage);
1260 EXPORT_SYMBOL(mdc_setattr);
1261 EXPORT_SYMBOL(mdc_close);
1262 EXPORT_SYMBOL(mdc_done_writing);
1263 EXPORT_SYMBOL(mdc_sync);
1264 EXPORT_SYMBOL(mdc_set_open_replay_data);
1265 EXPORT_SYMBOL(mdc_clear_open_replay_data);
1266 EXPORT_SYMBOL(mdc_store_inode_generation);
1267
1268 module_init(mdc_init);
1269 module_exit(mdc_exit);
1270 #endif