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) 2001-2004 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/lustre_sec.h>
  40 #include <linux/lprocfs_status.h>
  41 #include <linux/lustre_acl.h>
  42 #include <linux/lustre_lite.h>
  43 #include <linux/lustre_gs.h>
  44 #include "mdc_internal.h"
  45
  46 #define REQUEST_MINOR 244
  47
  48 static int mdc_cleanup(struct obd_device *obd, int flags);
  49
  50 extern int mds_queue_req(struct ptlrpc_request *);
  51 /* Helper that implements most of mdc_getstatus and signal_completed_replay. */
  52 /* XXX this should become mdc_get_info("key"), sending MDS_GET_INFO RPC */
  53 static int send_getstatus(struct obd_import *imp, struct lustre_id *rootid,
  54                           int level, int msg_flags)
  55 {
  56         struct ptlrpc_request *req;
  57         struct mds_body *body;
  58         int rc, size[2] = {0, sizeof(*body)};
  59         ENTRY;
  60
  61         //size[0] = lustre_secdesc_size();
  62
  63         req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_GETSTATUS,
  64                               2, size, NULL);
  65         if (!req)
  66                 GOTO(out, rc = -ENOMEM);
  67
  68         //lustre_pack_secdesc(req, size[0]);
  69
  70         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof (*body));
  71         req->rq_send_state = level;
  72         req->rq_replen = lustre_msg_size(1, &size[1]);
  73
  74         req->rq_reqmsg->flags |= msg_flags;
  75         rc = ptlrpc_queue_wait(req);
  76
  77         if (!rc) {
  78                 body = lustre_swab_repbuf (req, 0, sizeof (*body),
  79                                            lustre_swab_mds_body);
  80                 if (body == NULL) {
  81                         CERROR ("Can't extract mds_body\n");
  82                         GOTO (out, rc = -EPROTO);
  83                 }
  84
  85                 memcpy(rootid, &body->id1, sizeof(*rootid));
  86
  87                 CDEBUG(D_NET, "root ino="LPU64", last_committed="LPU64
  88                        ", last_xid="LPU64"\n", rootid->li_stc.u.e3s.l3s_ino,
  89                        req->rq_repmsg->last_committed, req->rq_repmsg->last_xid);
  90         }
  91
  92         EXIT;
  93  out:
  94         ptlrpc_req_finished(req);
  95         return rc;
  96 }
  97
  98 /* This should be mdc_get_info("rootid") */
  99 int mdc_getstatus(struct obd_export *exp, struct lustre_id *rootid)
 100 {
 101         return send_getstatus(class_exp2cliimp(exp), rootid,
 102                               LUSTRE_IMP_FULL, 0);
 103 }
 104
 105 int
 106 mdc_interpret_getattr(struct ptlrpc_request *req, void *unused, int rc)
 107 {
 108         struct mds_body *body = NULL;
 109         struct lustre_capa *capa = NULL;
 110         unsigned long expiry;
 111         ENTRY;
 112
 113         if (rc) {
 114                 DEBUG_REQ(D_ERROR, req,
 115                           "async getattr failed: rc = %d", rc);
 116                 RETURN(rc);
 117         }
 118
 119         body = lustre_swab_repbuf(req, 0, sizeof (*body), lustre_swab_mds_body);
 120         if (body == NULL) {
 121                 CERROR ("Can't unpack mds_body\n");
 122                 RETURN(-EPROTO);
 123         }
 124
 125         if (!(body->valid & OBD_MD_CAPA)) {
 126                 CDEBUG(D_INFO, "MDS has disabled capability\n");
 127                 RETURN(0);
 128         }
 129
 130         capa = lustre_swab_repbuf(req, 1, sizeof(*capa),
 131                                   lustre_swab_lustre_capa);
 132         if (capa == NULL && rc != 0) {
 133                 CERROR ("Can't unpack lustre_capa\n");
 134                 RETURN(-EPROTO);
 135         }
 136
 137         rc = capa_renew(capa, CLIENT_CAPA);
 138         if (rc)
 139                 RETURN(rc);
 140
 141         expiry = expiry_to_jiffies(capa->lc_expiry - capa_pre_expiry(capa));
 142         if (time_before(expiry, ll_capa_timer.expires) ||
 143             !timer_pending(&ll_capa_timer))
 144                 mod_timer(&ll_capa_timer, expiry);
 145
 146         RETURN(rc);
 147 }
 148
 149 int mdc_getattr_async(struct obd_export *exp, struct ptlrpc_request *req)
 150 {
 151         int repsize[2] = {sizeof(struct mds_body), sizeof(struct lustre_capa)};
 152         ENTRY;
 153
 154         req->rq_replen = lustre_msg_size(1, repsize);
 155         req->rq_interpret_reply = mdc_interpret_getattr;
 156         ptlrpcd_add_req(req);
 157
 158         RETURN (0);
 159 }
 160
 161 int mdc_getattr_common(struct obd_export *exp, unsigned int ea_size,
 162                        struct ptlrpc_request *req)
 163 {
 164         struct mds_body *body, *reqbody;
 165         void            *eadata;
 166         int              rc;
 167         int              repsize[2] = {sizeof(*body)};
 168         int              bufcount = 1;
 169         ENTRY;
 170
 171         /* request message already built */
 172
 173         if (ea_size != 0) {
 174                 repsize[bufcount++] = ea_size;
 175                 CDEBUG(D_INODE, "reserved %u bytes for MD/symlink in packet\n",
 176                        ea_size);
 177         }
 178
 179         reqbody = lustre_msg_buf(req->rq_reqmsg, 1, sizeof(*reqbody));
 180         LASSERT(!(reqbody->valid & OBD_MD_FLACL));
 181
 182         if (reqbody->valid & OBD_MD_FLKEY) {
 183                 repsize[bufcount++] = 5;
 184                 repsize[bufcount++] = sizeof(struct lustre_key);
 185         } else if (reqbody->valid & OBD_MD_CAPA) {
 186                 LASSERT(ea_size == 0);
 187                 repsize[bufcount++] = sizeof(struct lustre_capa);
 188         }
 189
 190         req->rq_replen = lustre_msg_size(bufcount, repsize);
 191
 192         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 193         rc = ptlrpc_queue_wait(req);
 194         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 195         if (rc != 0)
 196                 RETURN (rc);
 197
 198         body = lustre_swab_repbuf (req, 0, sizeof (*body),
 199                                    lustre_swab_mds_body);
 200         if (body == NULL) {
 201                 CERROR ("Can't unpack mds_body\n");
 202                 RETURN (-EPROTO);
 203         }
 204
 205         CDEBUG(D_NET, "mode: %o\n", body->mode);
 206
 207         LASSERT_REPSWAB (req, 1);
 208
 209         /* Skip the check if getxattr/listxattr are called with no buffers */
 210         if ((reqbody->eadatasize != 0) &&
 211             !(reqbody->valid & (OBD_MD_FLXATTR | OBD_MD_FLXATTRLIST))) {
 212                 /* reply indicates presence of eadata; check it's there... */
 213                 eadata = lustre_msg_buf (req->rq_repmsg, 1,
 214                                          body->eadatasize);
 215                 if (eadata == NULL) {
 216                         CERROR ("Missing/short eadata\n");
 217                         RETURN (-EPROTO);
 218                 }
 219         }
 220
 221         RETURN (0);
 222 }
 223
 224 static int mdc_cancel_unused(struct obd_export *exp,
 225                              struct lov_stripe_md *lsm,
 226                              int flags, void *opaque)
 227 {
 228         struct obd_device *obd = class_exp2obd(exp);
 229
 230         ENTRY;
 231         RETURN(ldlm_cli_cancel_unused(obd->obd_namespace,
 232                                       NULL, flags, opaque));
 233 }
 234
 235 int mdc_getattr(struct obd_export *exp, struct lustre_id *id,
 236                 __u64 valid, const char *xattr_name,
 237                 const void *xattr_data, unsigned int xattr_datalen,
 238                 unsigned int ea_size, struct obd_capa *ocapa,
 239                 struct ptlrpc_request **request)
 240 {
 241         struct ptlrpc_request *req;
 242         struct mds_body *body;
 243         int xattr_namelen = xattr_name ? strlen(xattr_name) + 1 : 0;
 244         int size[4] = {0, sizeof(*body)};
 245         int bufcount = 2;
 246         int rc;
 247         ENTRY;
 248
 249         size[0] = lustre_secdesc_size();
 250
 251         if (valid & OBD_MD_FLXATTR) {
 252                 size[bufcount++] = xattr_namelen;
 253
 254                 if (xattr_datalen > 0) {
 255                         LASSERT(xattr_data);
 256                         size[bufcount++] = xattr_datalen;
 257                 }
 258         } else if (valid & OBD_MD_CAPA) {
 259                 LASSERT(valid  == OBD_MD_CAPA);
 260                 LASSERT(ocapa);
 261                 size[bufcount++] = sizeof(*ocapa);
 262         } else {
 263                 LASSERT(!xattr_data && !xattr_datalen);
 264         }
 265
 266         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 267                               MDS_GETATTR, bufcount, size, NULL);
 268         if (!req)
 269                 GOTO(out, rc = -ENOMEM);
 270
 271         lustre_pack_secdesc(req, size[0]);
 272
 273         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof (*body));
 274         memcpy(&body->id1, id, sizeof(*id));
 275         body->valid = valid;
 276         body->eadatasize = ea_size;
 277
 278         if (valid & OBD_MD_FLXATTR) {
 279                 memcpy(lustre_msg_buf(req->rq_reqmsg, 2, xattr_namelen),
 280                        xattr_name, xattr_namelen);
 281                 if (xattr_datalen)
 282                         memcpy(lustre_msg_buf(req->rq_reqmsg, 3, xattr_datalen),
 283                                xattr_data, xattr_datalen);
 284         }
 285
 286         if (valid & OBD_MD_CAPA) {
 287                 /* renew capability */
 288                 memcpy(&body->handle, &ocapa->c_handle, sizeof(body->handle));
 289                 memcpy(lustre_msg_buf(req->rq_reqmsg, 2, sizeof(ocapa->c_capa)),
 290                        &ocapa->c_capa, sizeof(ocapa->c_capa));
 291
 292                 rc = mdc_getattr_async(exp, req);
 293                 req = NULL;     /* ptlrpcd will finish request */
 294         } else {
 295                 rc = mdc_getattr_common(exp, ea_size, req);
 296                 if (rc != 0) {
 297                         ptlrpc_req_finished (req);
 298                         req = NULL;
 299                 }
 300         }
 301  out:
 302         *request = req;
 303         RETURN (rc);
 304 }
 305
 306 int mdc_access_check(struct obd_export *exp, struct lustre_id *id,
 307                      struct ptlrpc_request **request)
 308
 309 {
 310         struct ptlrpc_request *req;
 311         struct mds_body *body;
 312         int size[2] = {0, sizeof(*body)};
 313         int rc;
 314         ENTRY;
 315
 316         size[0] = lustre_secdesc_size();
 317         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 318                               MDS_ACCESS_CHECK, 2, size, NULL);
 319         if (!req)
 320                 GOTO(out, rc = -ENOMEM);
 321
 322         lustre_pack_secdesc(req, size[0]);
 323         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof (*body));
 324         memcpy(&body->id1, id, sizeof(*id));
 325
 326         size[0] = sizeof(*body);
 327         size[1] = sizeof(struct mds_remote_perm);
 328         req->rq_replen = lustre_msg_size(2, size);
 329
 330         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 331         rc = ptlrpc_queue_wait(req);
 332         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 333         if (rc != 0) {
 334                 ptlrpc_req_finished (req);
 335                 req = NULL;
 336         } else {
 337                 body = lustre_swab_repbuf (req, 0, sizeof (*body),
 338                                            lustre_swab_mds_body);
 339                 if (body == NULL) {
 340                         CERROR ("Can't unpack mds_body\n");
 341                         RETURN (-EPROTO);
 342                 }
 343         }
 344
 345  out:
 346         *request = req;
 347         RETURN (rc);
 348 }
 349
 350 int mdc_getattr_lock(struct obd_export *exp, struct lustre_id *id,
 351                      char *filename, int namelen, __u64 valid,
 352                      unsigned int ea_size, struct ptlrpc_request **request)
 353 {
 354         struct ptlrpc_request *req;
 355         struct mds_body *body;
 356         int rc, size[3] = {0, sizeof(*body), namelen};
 357         ENTRY;
 358
 359         size[0] = lustre_secdesc_size();
 360
 361         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 362                               MDS_GETATTR_LOCK, 3, size, NULL);
 363         if (!req)
 364                 GOTO(out, rc = -ENOMEM);
 365
 366         lustre_pack_secdesc(req, size[0]);
 367
 368         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof (*body));
 369         memcpy(&body->id1, id, sizeof(*id));
 370         body->valid = valid;
 371         body->eadatasize = ea_size;
 372
 373         if (filename != NULL) {
 374                 LASSERT (strnlen (filename, namelen) == namelen - 1);
 375                 memcpy(lustre_msg_buf(req->rq_reqmsg, 2, namelen),
 376                        filename, namelen);
 377         } else {
 378                 LASSERT(namelen == 1);
 379         }
 380
 381         rc = mdc_getattr_common(exp, ea_size, req);
 382         if (rc != 0) {
 383                 ptlrpc_req_finished (req);
 384                 req = NULL;
 385         }
 386  out:
 387         *request = req;
 388         RETURN(rc);
 389 }
 390
 391 /* This should be called with both the request and the reply still packed. */
 392 int mdc_store_inode_generation(struct obd_export *exp,
 393                                struct ptlrpc_request *req,
 394                                int reqoff, int repoff)
 395 {
 396         struct mds_rec_create *rec =
 397                 lustre_msg_buf(req->rq_reqmsg, reqoff, sizeof(*rec));
 398         struct mds_body *body =
 399                 lustre_msg_buf(req->rq_repmsg, repoff, sizeof(*body));
 400
 401         LASSERT (rec != NULL);
 402         LASSERT (body != NULL);
 403
 404         memcpy(&rec->cr_replayid, &body->id1, sizeof(rec->cr_replayid));
 405         DEBUG_REQ(D_HA, req, "storing generation for ino "DLID4,
 406                   OLID4(&rec->cr_replayid));
 407         return 0;
 408 }
 409
 410 int mdc_req2lustre_capa(struct ptlrpc_request *req, unsigned int offset,
 411                         struct lustre_capa **capa)
 412 {
 413         struct mds_body *body;
 414         struct lustre_capa *lcapa;
 415
 416         body = lustre_msg_buf(req->rq_repmsg, offset, sizeof(*body));
 417         if (!body)
 418                 RETURN(-ENOMEM);
 419
 420         if (!(body->valid & OBD_MD_CAPA)) {
 421                 *capa = NULL;
 422                 RETURN(0);
 423         }
 424
 425         lcapa = (struct lustre_capa *)lustre_swab_repbuf(req, offset + 1,
 426                                         sizeof(*capa), lustre_swab_lustre_capa);
 427         if (!lcapa)
 428                 RETURN(-ENOMEM);
 429
 430         OBD_ALLOC(*capa, sizeof(**capa));
 431         if (!*capa)
 432                 RETURN(-ENOMEM);
 433         memcpy(*capa, lcapa, sizeof(**capa));
 434
 435         RETURN(0);
 436 }
 437
 438 static
 439 int mdc_unpack_acl(struct obd_export *exp_lmv, struct ptlrpc_request *req,
 440                    unsigned int offset, struct lustre_md *md)
 441 {
 442         struct posix_acl *acl;
 443         struct mds_remote_perm *perm;
 444         int    size, rc;
 445         void  *buf;
 446         ENTRY;
 447
 448         if (!(md->body->valid & OBD_MD_FLACL))
 449                 RETURN(0);
 450
 451         if (md->body->valid & OBD_MD_FLRMTACL) {
 452                 offset++; /* first 'size' is not used */
 453
 454                 buf = lustre_swab_repbuf(req, offset, sizeof(*perm),
 455                                          lustre_swab_remote_perm);
 456                 if (buf == NULL) {
 457                         CERROR("Can't unpack remote perm\n");
 458                         RETURN(-EFAULT);
 459                 }
 460
 461                 OBD_ALLOC(perm, sizeof(*perm));
 462                 if (!perm)
 463                         RETURN(-ENOMEM);
 464                 memcpy(perm, buf, sizeof(*perm));
 465                 md->remote_perm = perm;
 466         } else {
 467                 size = le32_to_cpu(*(__u32 *) lustre_msg_buf(
 468                                    req->rq_repmsg, offset, 4));
 469                 buf = lustre_msg_buf(req->rq_repmsg, offset + 1, size);
 470
 471                 acl = posix_acl_from_xattr(buf, size);
 472                 if (IS_ERR(acl)) {
 473                         rc = PTR_ERR(acl);
 474                         CERROR("convert xattr to acl failed: %d\n", rc);
 475                         RETURN(rc);
 476                 } else if (acl) {
 477                         rc = posix_acl_valid(acl);
 478                         if (rc) {
 479                                 CERROR("acl valid error: %d\n", rc);
 480                                 posix_acl_release(acl);
 481                                 RETURN(rc);
 482                         }
 483                 }
 484
 485                 md->posix_acl = acl;
 486         }
 487
 488         RETURN(0);
 489 }
 490
 491 static int mdc_unpack_gskey(struct obd_export *exp_lmv, struct ptlrpc_request *req,
 492                             unsigned int *offset, struct lustre_md *md)
 493 {
 494         int key_off = 0, rc = 0, size = 0;
 495         void *buf;
 496
 497         key_off = *offset;
 498         if (md->body->valid & OBD_MD_FLKEY) {
 499                 size = le32_to_cpu(*(__u32 *) lustre_msg_buf(req->rq_repmsg,
 500                                    key_off++, 4));
 501                 buf = lustre_msg_buf(req->rq_repmsg, key_off++, size);
 502
 503                 CDEBUG(D_INFO, "buf %p key_off %d size %d \n",
 504                        buf, key_off, size);
 505                 md->key = (struct lustre_key *)buf;
 506                 *offset = key_off;
 507         } else {
 508                 *offset += 2;
 509         }
 510         RETURN(rc);
 511 }
 512
 513 int mdc_req2lustre_md(struct obd_export *exp_lmv, struct ptlrpc_request *req,
 514                       unsigned int offset, struct obd_export *exp_lov,
 515                       struct lustre_md *md)
 516 {
 517         struct lov_mds_md *lmm;
 518         int rc = 0, reply_off;
 519         ENTRY;
 520
 521         LASSERT(md != NULL);
 522         memset(md, 0, sizeof(*md));
 523
 524         md->body = lustre_msg_buf(req->rq_repmsg, offset,
 525                                   sizeof(*md->body));
 526         if (!md->body)
 527                 RETURN(-ENOMEM);
 528
 529         LASSERT_REPSWABBED(req, offset);
 530
 531         if (!(md->body->valid & OBD_MD_FLEASIZE) &&
 532             !(md->body->valid & OBD_MD_FLDIREA))
 533                 RETURN(0);
 534
 535         if (S_ISREG(md->body->mode)) {
 536                 if (md->body->eadatasize == 0) {
 537                         CERROR("invalid EA size (0) is detected\n");
 538                         RETURN(-EPROTO);
 539                 }
 540
 541                 lmm = lustre_msg_buf(req->rq_repmsg, offset + 1,
 542                                      md->body->eadatasize);
 543                 if (!lmm)
 544                         RETURN(-EINVAL);
 545
 546                 LASSERT(exp_lov != NULL);
 547
 548                 rc = obd_unpackmd(exp_lov, &md->lsm, lmm,
 549                                   md->body->eadatasize);
 550                 if (rc > 0) {
 551                         LASSERT(rc >= sizeof(*md->lsm));
 552                         rc = 0;
 553                 }
 554         } else if (S_ISDIR(md->body->mode)) {
 555                 /* dir can be non-splitted */
 556                 if (md->body->eadatasize == 0)
 557                         RETURN(0);
 558
 559                 lmm = lustre_msg_buf(req->rq_repmsg, offset + 1,
 560                                      md->body->eadatasize);
 561                 if (!lmm)
 562                         RETURN(-EINVAL);
 563
 564                 if (md->body->valid & OBD_MD_MEA) {
 565                         LASSERT(exp_lmv != NULL);
 566
 567                         rc = obd_unpackmd(exp_lmv, (void *)&md->mea,
 568                                           lmm, md->body->eadatasize);
 569                         if (rc > 0) {
 570                                 LASSERT(rc >= sizeof(*md->mea));
 571                                 rc = 0;
 572                         }
 573                 }
 574         } else {
 575                 LASSERT(S_ISCHR(md->body->mode) ||
 576                         S_ISBLK(md->body->mode) ||
 577                         S_ISFIFO(md->body->mode)||
 578                         S_ISLNK(md->body->mode) ||
 579                         S_ISSOCK(md->body->mode));
 580         }
 581
 582         /* if anything wrong when unpacking md, we don't check acl
 583          * stuff, for simplicity
 584          */
 585         if (rc)
 586                 RETURN(rc);
 587
 588         reply_off = (md->body->valid & OBD_MD_FLEASIZE) ?
 589                                 (offset + 2) : (offset + 1);
 590         rc = mdc_unpack_acl(exp_lmv, req, reply_off, md);
 591         if (rc) {
 592                 CERROR("upack acl error %d \n", rc);
 593                 RETURN(rc);
 594         }
 595         reply_off += 2;
 596
 597         rc = mdc_unpack_gskey(exp_lmv, req, &reply_off, md);
 598         if (rc)
 599                 RETURN(rc);
 600
 601         RETURN(rc);
 602 }
 603
 604 static void mdc_commit_open(struct ptlrpc_request *req)
 605 {
 606         struct mdc_open_data *mod = req->rq_cb_data;
 607         if (mod == NULL)
 608                 return;
 609
 610         if (mod->mod_close_req != NULL)
 611                 mod->mod_close_req->rq_cb_data = NULL;
 612
 613         if (mod->mod_och != NULL)
 614                 mod->mod_och->och_mod = NULL;
 615
 616         OBD_FREE(mod, sizeof(*mod));
 617         req->rq_cb_data = NULL;
 618         LASSERT(atomic_read(&req->rq_refcount) > 1);
 619         ptlrpc_req_finished(req);
 620 }
 621
 622 static void mdc_replay_open(struct ptlrpc_request *req)
 623 {
 624         struct mdc_open_data *mod = req->rq_cb_data;
 625         struct obd_client_handle *och;
 626         struct ptlrpc_request *close_req;
 627         struct lustre_handle old;
 628         struct mds_body *body;
 629         ENTRY;
 630
 631         body = lustre_swab_repbuf(req, 1, sizeof(*body), lustre_swab_mds_body);
 632         LASSERT (body != NULL);
 633
 634         if (mod == NULL) {
 635                 DEBUG_REQ(D_ERROR, req,
 636                           "can't properly replay without open data");
 637                 EXIT;
 638                 return;
 639         }
 640
 641         och = mod->mod_och;
 642         if (och != NULL) {
 643                 struct lustre_handle *file_fh;
 644                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 645                 file_fh = &och->och_fh;
 646                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 647                        file_fh->cookie, body->handle.cookie);
 648                 memcpy(&old, file_fh, sizeof(old));
 649                 memcpy(file_fh, &body->handle, sizeof(*file_fh));
 650         }
 651
 652         close_req = mod->mod_close_req;
 653         if (close_req != NULL) {
 654                 struct mds_body *close_body;
 655                 LASSERT(close_req->rq_reqmsg->opc == MDS_CLOSE);
 656                 close_body = lustre_msg_buf(close_req->rq_reqmsg,
 657                                             MDS_REQ_REC_OFF,
 658                                             sizeof(*close_body));
 659                 if (och != NULL)
 660                         LASSERT(!memcmp(&old, &close_body->handle, sizeof old));
 661                 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
 662                 memcpy(&close_body->handle, &body->handle,
 663                        sizeof(close_body->handle));
 664         }
 665
 666         EXIT;
 667 }
 668
 669 int mdc_set_open_replay_data(struct obd_export *exp,
 670                              struct obd_client_handle *och,
 671                              struct ptlrpc_request *open_req)
 672 {
 673         struct mdc_open_data *mod;
 674         struct mds_rec_create *rec;
 675         struct mds_body *body;
 676
 677         rec = lustre_msg_buf(open_req->rq_reqmsg, MDS_REQ_INTENT_REC_OFF,
 678                              sizeof(*rec));
 679         body = lustre_msg_buf(open_req->rq_repmsg, 1, sizeof(*body));
 680
 681         LASSERT(rec != NULL);
 682         /* outgoing messages always in my byte order */
 683         LASSERT(body != NULL);
 684         /* incoming message in my byte order (it's been swabbed) */
 685         LASSERT_REPSWABBED(open_req, 1);
 686
 687         OBD_ALLOC(mod, sizeof(*mod));
 688         if (mod == NULL) {
 689                 DEBUG_REQ(D_ERROR, open_req, "can't allocate mdc_open_data");
 690                 return 0;
 691         }
 692
 693         och->och_mod = mod;
 694         mod->mod_och = och;
 695         mod->mod_open_req = ptlrpc_request_addref(open_req);
 696
 697         memcpy(&rec->cr_replayid, &body->id1, sizeof rec->cr_replayid);
 698         open_req->rq_replay_cb = mdc_replay_open;
 699         open_req->rq_commit_cb = mdc_commit_open;
 700         open_req->rq_cb_data = mod;
 701         DEBUG_REQ(D_HA, open_req, "set up replay data");
 702         return 0;
 703 }
 704
 705 int mdc_clear_open_replay_data(struct obd_export *exp,
 706                                struct obd_client_handle *och)
 707 {
 708         struct mdc_open_data *mod = och->och_mod;
 709
 710         /* Don't free the structure now (it happens in mdc_commit_open, after
 711          * we're sure we won't need to fix up the close request in the future),
 712          * but make sure that replay doesn't poke at the och, which is about to
 713          * be freed. */
 714         LASSERT(mod != LP_POISON);
 715         if (mod != NULL)
 716                 mod->mod_och = NULL;
 717         och->och_mod = NULL;
 718         return 0;
 719 }
 720
 721 static void mdc_commit_close(struct ptlrpc_request *req)
 722 {
 723         struct mdc_open_data *mod = req->rq_cb_data;
 724         struct obd_import *imp = req->rq_import;
 725         struct ptlrpc_request *open_req;
 726
 727         DEBUG_REQ(D_HA, req, "close req committed");
 728         if (mod == NULL)
 729                 return;
 730
 731         mod->mod_close_req = NULL;
 732         req->rq_cb_data = NULL;
 733         req->rq_commit_cb = NULL;
 734
 735         open_req = mod->mod_open_req;
 736         LASSERT(open_req != NULL);
 737         LASSERT(open_req != LP_POISON);
 738         LASSERT(open_req->rq_type != LI_POISON);
 739
 740         DEBUG_REQ(D_HA, open_req, "open req balanced");
 741         if (open_req->rq_transno == 0) {
 742                 DEBUG_REQ(D_ERROR, open_req, "BUG 3892  open");
 743                 DEBUG_REQ(D_ERROR, req, "BUG 3892 close");
 744                 LASSERTF(open_req->rq_transno != 0, "BUG 3892\n");
 745         }
 746         LASSERT(open_req->rq_import == imp);
 747
 748         /* We no longer want to preserve this for transno-unconditional
 749          * replay. */
 750         spin_lock(&open_req->rq_lock);
 751         open_req->rq_replay = 0;
 752         spin_unlock(&open_req->rq_lock);
 753 }
 754
 755 int mdc_close(struct obd_export *exp, struct mdc_op_data *op_data,
 756               struct obd_client_handle *och, struct ptlrpc_request **request)
 757 {
 758         struct obd_device *obd = class_exp2obd(exp);
 759         struct obd_import *imp = class_exp2cliimp(exp);
 760         int reqsize[3] = {0, sizeof(struct mds_body),
 761                           obd->u.cli.cl_max_mds_cookiesize};
 762         int rc, repsize[3] = {sizeof(struct mds_body),
 763                               obd->u.cli.cl_max_mds_easize,
 764                               obd->u.cli.cl_max_mds_cookiesize};
 765         struct ptlrpc_request *req;
 766         struct mdc_open_data *mod;
 767         ENTRY;
 768
 769         if (imp->imp_connection == NULL) {
 770                 CERROR("request on not connected import %s\n",
 771                         imp->imp_obd->obd_name);
 772                 RETURN(-EIO);
 773         }
 774
 775         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 776                               MDS_CLOSE, 3, reqsize, NULL);
 777         if (req == NULL)
 778                 GOTO(out, rc = -ENOMEM);
 779         req->rq_request_portal = MDS_CLOSE_PORTAL;
 780
 781         /* ensure that this close's handle is fixed up during replay. */
 782         LASSERT(och != NULL);
 783         mod = och->och_mod;
 784         if (likely(mod != NULL)) {
 785                 mod->mod_close_req = req;
 786                 LASSERT(mod->mod_open_req->rq_type != LI_POISON);
 787                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open");
 788         } else {
 789                 CDEBUG(D_HA, "couldn't find open req; "
 790                        "expecting close error\n");
 791         }
 792
 793         mdc_close_pack(req, 1, op_data, och);
 794
 795         req->rq_replen = lustre_msg_size(3, repsize);
 796         req->rq_commit_cb = mdc_commit_close;
 797         LASSERT(req->rq_cb_data == NULL);
 798         req->rq_cb_data = mod;
 799
 800         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 801         rc = ptlrpc_queue_wait(req);
 802         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 803
 804         if (req->rq_repmsg == NULL) {
 805                 CDEBUG(D_HA, "request failed to send: %p, %d\n", req,
 806                        req->rq_status);
 807                 if (rc == 0)
 808                         rc = req->rq_status ? req->rq_status : -EIO;
 809         } else if (rc == 0) {
 810                 rc = req->rq_repmsg->status;
 811                 if (req->rq_repmsg->type == PTL_RPC_MSG_ERR) {
 812                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, "
 813                                   "err = %d", rc);
 814                         if (rc > 0)
 815                                 rc = -rc;
 816                 } else {
 817                         if (mod == NULL)
 818                                 CERROR("Unexpected: can't find mdc_open_data, but "
 819                                        "close succeeded. Please tell CFS.\n");
 820                         if (!lustre_swab_repbuf(req, 0, sizeof(struct mds_body),
 821                                                 lustre_swab_mds_body))
 822                         {
 823                                 CERROR("Error unpacking mds_body\n");
 824                                 rc = -EPROTO;
 825                         }
 826                 }
 827         }
 828
 829         EXIT;
 830  out:
 831         *request = req;
 832         return rc;
 833 }
 834
 835 int mdc_done_writing(struct obd_export *exp, struct obdo *obdo)
 836 {
 837         struct ptlrpc_request *req;
 838         struct mds_body *body;
 839         int rc, size[2] = {0, sizeof(*body)};
 840         ENTRY;
 841
 842         size[0] = lustre_secdesc_size();
 843
 844         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 845                               MDS_DONE_WRITING, 2, size, NULL);
 846         if (req == NULL)
 847                 RETURN(-ENOMEM);
 848
 849         lustre_pack_secdesc(req, size[0]);
 850
 851         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF,
 852                               sizeof(*body));
 853
 854         mdc_pack_id(&body->id1, obdo->o_id, 0, obdo->o_mode,
 855                     obdo->o_mds, obdo->o_fid);
 856
 857         body->size = obdo->o_size;
 858         body->blocks = obdo->o_blocks;
 859         body->flags = obdo->o_flags;
 860         body->valid = obdo->o_valid;
 861
 862         req->rq_replen = lustre_msg_size(1, &size[1]);
 863
 864         rc = ptlrpc_queue_wait(req);
 865         ptlrpc_req_finished(req);
 866         RETURN(rc);
 867 }
 868
 869 int mdc_readpage(struct obd_export *exp,
 870                  struct lustre_id *id,
 871                  __u64 offset, struct page *page,
 872                  struct ptlrpc_request **request)
 873 {
 874         struct obd_import *imp = class_exp2cliimp(exp);
 875         struct ptlrpc_request *req = NULL;
 876         struct ptlrpc_bulk_desc *desc = NULL;
 877         struct mds_body *body;
 878         int rc, size[2] = {0, sizeof(*body)};
 879         ENTRY;
 880
 881         CDEBUG(D_INODE, "inode: %ld\n", (long)id->li_stc.u.e3s.l3s_ino);
 882
 883         size[0] = lustre_secdesc_size();
 884
 885         req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_READPAGE,
 886                               2, size, NULL);
 887         if (req == NULL)
 888                 GOTO(out, rc = -ENOMEM);
 889         /* XXX FIXME bug 249 */
 890         req->rq_request_portal = MDS_READPAGE_PORTAL;
 891
 892         lustre_pack_secdesc(req, size[0]);
 893
 894         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_PUT_SINK, MDS_BULK_PORTAL);
 895         if (desc == NULL)
 896                 GOTO(out, rc = -ENOMEM);
 897         /* NB req now owns desc and will free it when it gets freed */
 898
 899         ptlrpc_prep_bulk_page(desc, page, 0, PAGE_CACHE_SIZE);
 900         mdc_readdir_pack(req, 1, offset, PAGE_CACHE_SIZE, id);
 901
 902         req->rq_replen = lustre_msg_size(1, &size[1]);
 903         rc = ptlrpc_queue_wait(req);
 904
 905         if (rc == 0) {
 906                 body = lustre_swab_repbuf(req, 0, sizeof (*body),
 907                                           lustre_swab_mds_body);
 908                 if (body == NULL) {
 909                         CERROR("Can't unpack mds_body\n");
 910                         GOTO(out, rc = -EPROTO);
 911                 }
 912
 913                 if (req->rq_bulk->bd_nob_transferred != PAGE_CACHE_SIZE) {
 914                         CERROR ("Unexpected # bytes transferred: %d"
 915                                 " (%ld expected)\n",
 916                                 req->rq_bulk->bd_nob_transferred,
 917                                 PAGE_CACHE_SIZE);
 918                         GOTO (out, rc = -EPROTO);
 919                 }
 920         }
 921
 922         EXIT;
 923  out:
 924         *request = req;
 925         return rc;
 926 }
 927
 928 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 929                          void *karg, void *uarg)
 930 {
 931         struct obd_device *obd = exp->exp_obd;
 932         struct obd_ioctl_data *data = karg;
 933         struct obd_import *imp = obd->u.cli.cl_import;
 934         struct llog_ctxt *ctxt;
 935         int rc;
 936         ENTRY;
 937
 938 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 939         MOD_INC_USE_COUNT;
 940 #else
 941         if (!try_module_get(THIS_MODULE)) {
 942                 CERROR("Can't get module. Is it alive?");
 943                 return -EINVAL;
 944         }
 945 #endif
 946         switch (cmd) {
 947         case OBD_IOC_CLIENT_RECOVER:
 948                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1);
 949                 if (rc < 0)
 950                         GOTO(out, rc);
 951                 GOTO(out, rc = 0);
 952         case IOC_OSC_SET_ACTIVE:
 953                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
 954                 GOTO(out, rc);
 955         case IOC_OSC_CTL_RECOVERY:
 956                 rc = ptlrpc_import_control_recovery(imp, data->ioc_offset);
 957                 GOTO(out, rc);
 958         case OBD_IOC_PARSE: {
 959                 ctxt = llog_get_context(&exp->exp_obd->obd_llogs,
 960                                         LLOG_CONFIG_REPL_CTXT);
 961                 rc = class_config_process_llog(ctxt, data->ioc_inlbuf1, NULL);
 962                 GOTO(out, rc);
 963         }
 964 #ifdef __KERNEL__
 965         case OBD_IOC_LLOG_INFO:
 966         case OBD_IOC_LLOG_PRINT: {
 967                 ctxt = llog_get_context(&obd->obd_llogs, LLOG_CONFIG_REPL_CTXT);
 968                 rc = llog_ioctl(ctxt, cmd, data);
 969
 970                 GOTO(out, rc);
 971         }
 972 #endif
 973         default:
 974                 CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd);
 975                 GOTO(out, rc = -ENOTTY);
 976         }
 977 out:
 978 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
 979         MOD_DEC_USE_COUNT;
 980 #else
 981         module_put(THIS_MODULE);
 982 #endif
 983
 984         return rc;
 985 }
 986
 987 int mdc_set_info(struct obd_export *exp, obd_count keylen,
 988                  void *key, obd_count vallen, void *val)
 989 {
 990         int rc = -EINVAL;
 991
 992         if (keylen == strlen("initial_recov") &&
 993             memcmp(key, "initial_recov", strlen("initial_recov")) == 0) {
 994                 struct obd_import *imp = exp->exp_obd->u.cli.cl_import;
 995                 if (vallen != sizeof(int))
 996                         RETURN(-EINVAL);
 997                 imp->imp_initial_recov = *(int *)val;
 998                 CDEBUG(D_HA, "%s: set imp_no_init_recov = %d\n",
 999                        exp->exp_obd->obd_name,
1000                        imp->imp_initial_recov);
1001                 RETURN(0);
1002         } else if ((keylen >= strlen("crypto_type")) &&
1003                     strcmp(key, "crypto_type") == 0) {
1004                 struct ptlrpc_request *req;
1005                 char *bufs[2] = {key, val};
1006                 int rc, size[2] = {keylen, vallen};
1007
1008                 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
1009                                       OST_SET_INFO, 2, size, bufs);
1010                 if (req == NULL)
1011                         RETURN(-ENOMEM);
1012
1013                 req->rq_replen = lustre_msg_size(0, NULL);
1014                 rc = ptlrpc_queue_wait(req);
1015                 ptlrpc_req_finished(req);
1016                 RETURN(rc);
1017         } else if (keylen >= strlen("inter_mds") && strcmp(key, "inter_mds") == 0) {
1018                 struct obd_import *imp = class_exp2cliimp(exp);
1019                 imp->imp_server_timeout = 1;
1020                 CDEBUG(D_OTHER, "%s: timeout / 2\n", exp->exp_obd->obd_name);
1021                 RETURN(0);
1022         } else if (keylen == strlen("sec") &&
1023                    memcmp(key, "sec", keylen) == 0) {
1024                 struct client_obd *cli = &exp->exp_obd->u.cli;
1025
1026                 cli->cl_sec_flavor = ptlrpcs_name2flavor(val);
1027                 if (cli->cl_sec_flavor == PTLRPCS_FLVR_INVALID) {
1028                         CERROR("unrecognized security type %s\n", (char*) val);
1029                         RETURN(-EINVAL);
1030                 }
1031
1032                 RETURN(0);
1033         } else if (keylen == strlen("sec_flags") &&
1034                    memcmp(key, "sec_flags", keylen) == 0) {
1035                 struct client_obd *cli = &exp->exp_obd->u.cli;
1036
1037                 cli->cl_sec_flags = *((unsigned long *) val);
1038                 RETURN(0);
1039         } else if (keylen == strlen("flush_cred") &&
1040                    memcmp(key, "flush_cred", keylen) == 0) {
1041                 struct client_obd *cli = &exp->exp_obd->u.cli;
1042
1043                 if (cli->cl_import)
1044                         ptlrpcs_import_flush_current_creds(cli->cl_import);
1045                 RETURN(0);
1046         } else if (keylen == strlen("async") && memcmp(key, "async", keylen) == 0) {
1047                 struct client_obd *cl = &exp->exp_obd->u.cli;
1048                 if (vallen != sizeof(int))
1049                         RETURN(-EINVAL);
1050                 cl->cl_async = *(int *)val;
1051                 CDEBUG(D_HA, "%s: set async = %d\n",
1052                        exp->exp_obd->obd_name, cl->cl_async);
1053                 RETURN(0);
1054         } else if (keylen == strlen("setext") && memcmp(key, "setext", keylen) == 0) {
1055                 struct ptlrpc_request *req;
1056                 char *bufs[2] = {key, val};
1057                 int rc, size[2] = {keylen, vallen};
1058
1059                 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
1060                                       OST_SET_INFO, 2, size, bufs);
1061                 if (req == NULL)
1062                         RETURN(-ENOMEM);
1063
1064                 req->rq_replen = lustre_msg_size(0, NULL);
1065                 rc = ptlrpc_queue_wait(req);
1066                 ptlrpc_req_finished(req);
1067                 RETURN(rc);
1068         } else if (keylen == 5 && strcmp(key, "audit") == 0) {
1069                 struct ptlrpc_request *req;
1070                 char *bufs[2] = {key, val};
1071                 int rc, size[2] = {keylen, vallen};
1072
1073                 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
1074                                       OST_SET_INFO, 2, size, bufs);
1075                 if (req == NULL)
1076                         RETURN(-ENOMEM);
1077
1078                 req->rq_replen = lustre_msg_size(0, NULL);
1079                 lustre_swab_reqbuf(req, 1, sizeof(struct audit_attr_msg),
1080                                    lustre_swab_audit_attr);
1081                 rc = ptlrpc_queue_wait(req);
1082                 ptlrpc_req_finished(req);
1083
1084                 RETURN(rc);
1085         } else if (keylen == strlen("ids") && memcmp(key, "ids", keylen) == 0) {
1086                 struct ptlrpc_request *req;
1087                 struct lustre_id *ids = (struct lustre_id *)val;
1088                 char *bufs[3] = {key, (char *)ids, (char *)(ids + 1)};
1089                 int rc, size[3] = {keylen, sizeof(struct lustre_id),
1090                                    sizeof(struct lustre_id)};
1091
1092                 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
1093                                       OST_SET_INFO, 3, size, bufs);
1094                 if (req == NULL)
1095                         RETURN(-ENOMEM);
1096
1097                 req->rq_replen = lustre_msg_size(0, NULL);
1098                 rc = ptlrpc_queue_wait(req);
1099                 ptlrpc_req_finished(req);
1100                 RETURN(rc);
1101         }
1102         RETURN(rc);
1103 }
1104
1105 static int mdc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1106                       unsigned long max_age)
1107 {
1108         struct obd_statfs *msfs;
1109         struct ptlrpc_request *req;
1110         int rc, size = sizeof(*msfs);
1111         ENTRY;
1112
1113         /* We could possibly pass max_age in the request (as an absolute
1114          * timestamp or a "seconds.usec ago") so the target can avoid doing
1115          * extra calls into the filesystem if that isn't necessary (e.g.
1116          * during mount that would help a bit).  Having relative timestamps
1117          * is not so great if request processing is slow, while absolute
1118          * timestamps are not ideal because they need time synchronization. */
1119         req = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_MDS_VERSION,
1120                               MDS_STATFS, 0, NULL, NULL);
1121         if (!req)
1122                 RETURN(-ENOMEM);
1123
1124         req->rq_replen = lustre_msg_size(1, &size);
1125
1126         mdc_get_rpc_lock(obd->u.cli.cl_rpc_lock, NULL);
1127         rc = ptlrpc_queue_wait(req);
1128         mdc_put_rpc_lock(obd->u.cli.cl_rpc_lock, NULL);
1129
1130         if (rc) {
1131                 /* this can be LMV fake import, whcih is not connected. */
1132                 if (!req->rq_import->imp_connection)
1133                         memset(osfs, 0, sizeof(*osfs));
1134                 GOTO(out, rc);
1135         }
1136
1137         msfs = lustre_swab_repbuf(req, 0, sizeof(*msfs),
1138                                   lustre_swab_obd_statfs);
1139         if (msfs == NULL) {
1140                 CERROR("Can't unpack obd_statfs\n");
1141                 GOTO(out, rc = -EPROTO);
1142         }
1143
1144         memcpy(osfs, msfs, sizeof (*msfs));
1145         EXIT;
1146 out:
1147         ptlrpc_req_finished(req);
1148         return rc;
1149 }
1150
1151 static int mdc_pin(struct obd_export *exp, obd_id ino, __u32 gen, int type,
1152                    struct obd_client_handle *handle, int flag)
1153 {
1154         struct ptlrpc_request *req;
1155         struct mds_body *body;
1156         int rc, size[2] = {0, sizeof(*body)};
1157         ENTRY;
1158
1159         //size[0] = lustre_secdesc_size();
1160
1161         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1162                               MDS_PIN, 2, size, NULL);
1163         if (req == NULL)
1164                 RETURN(-ENOMEM);
1165
1166         //lustre_pack_secdesc(req, size[0]);
1167
1168         body = lustre_msg_buf(req->rq_reqmsg,
1169                               MDS_REQ_REC_OFF, sizeof(*body));
1170
1171         /* FIXME-UMKA: here should be also mdsnum and fid. */
1172         mdc_pack_id(&body->id1, ino, gen, type, 0, 0);
1173         body->flags = flag;
1174
1175         req->rq_replen = lustre_msg_size(1, &size[1]);
1176
1177         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1178         rc = ptlrpc_queue_wait(req);
1179         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1180         if (rc) {
1181                 CERROR("pin failed: %d\n", rc);
1182                 ptlrpc_req_finished(req);
1183                 RETURN(rc);
1184         }
1185
1186         body = lustre_swab_repbuf(req, 0, sizeof(*body), lustre_swab_mds_body);
1187         if (body == NULL) {
1188                 ptlrpc_req_finished(req);
1189                 RETURN(rc);
1190         }
1191
1192         memcpy(&handle->och_fh, &body->handle, sizeof(body->handle));
1193         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
1194
1195         OBD_ALLOC(handle->och_mod, sizeof(*handle->och_mod));
1196         if (handle->och_mod == NULL) {
1197                 DEBUG_REQ(D_ERROR, req, "can't allocate mdc_open_data");
1198                 RETURN(-ENOMEM);
1199         }
1200         handle->och_mod->mod_open_req = req; /* will be dropped by unpin */
1201
1202         RETURN(rc);
1203 }
1204
1205 static int mdc_unpin(struct obd_export *exp,
1206                      struct obd_client_handle *handle, int flag)
1207 {
1208         struct ptlrpc_request *req;
1209         struct mds_body *body;
1210         int rc, size[2] = {0, sizeof(*body)};
1211         ENTRY;
1212
1213         if (handle->och_magic != OBD_CLIENT_HANDLE_MAGIC)
1214                 RETURN(0);
1215
1216         //size[0] = lustre_secdesc_size();
1217
1218         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1219                               MDS_CLOSE, 2, size, NULL);
1220         if (req == NULL)
1221                 RETURN(-ENOMEM);
1222
1223         //lustre_pack_secdesc(req, size[0]);
1224
1225         body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF, sizeof(*body));
1226         memcpy(&body->handle, &handle->och_fh, sizeof(body->handle));
1227         body->flags = flag;
1228
1229         req->rq_replen = lustre_msg_size(0, NULL);
1230         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1231         rc = ptlrpc_queue_wait(req);
1232         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1233
1234         if (rc != 0)
1235                 CERROR("unpin failed: %d\n", rc);
1236
1237         ptlrpc_req_finished(req);
1238         ptlrpc_req_finished(handle->och_mod->mod_open_req);
1239         OBD_FREE(handle->och_mod, sizeof(*handle->och_mod));
1240         RETURN(rc);
1241 }
1242
1243 int mdc_sync(struct obd_export *exp, struct lustre_id *id,
1244              struct ptlrpc_request **request)
1245 {
1246         struct ptlrpc_request *req;
1247         struct mds_body *body;
1248         int size[2] = {0, sizeof(*body)};
1249         int rc;
1250         ENTRY;
1251
1252         //size[0] = lustre_secdesc_size();
1253
1254         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1255                               MDS_SYNC, 2, size, NULL);
1256         if (!req)
1257                 RETURN(rc = -ENOMEM);
1258
1259         //lustre_pack_secdesc(req, size[0]);
1260
1261         if (id) {
1262                 body = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_REC_OFF,
1263                                       sizeof (*body));
1264                 memcpy(&body->id1, id, sizeof(*id));
1265         }
1266
1267         req->rq_replen = lustre_msg_size(1, &size[1]);
1268
1269         rc = ptlrpc_queue_wait(req);
1270         if (rc || request == NULL)
1271                 ptlrpc_req_finished(req);
1272         else
1273                 *request = req;
1274
1275         RETURN(rc);
1276 }
1277
1278 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
1279                             enum obd_import_event event)
1280 {
1281         int rc = 0;
1282
1283         LASSERT(imp->imp_obd == obd);
1284
1285         switch (event) {
1286         case IMP_EVENT_DISCON: {
1287                 break;
1288         }
1289         case IMP_EVENT_INACTIVE: {
1290                 if (obd->obd_observer)
1291                         rc = obd_notify(obd->obd_observer, obd, 0, 0);
1292                 break;
1293         }
1294         case IMP_EVENT_INVALIDATE: {
1295                 struct ldlm_namespace *ns = obd->obd_namespace;
1296
1297                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
1298
1299                 break;
1300         }
1301         case IMP_EVENT_ACTIVE: {
1302                 if (obd->obd_observer)
1303                         rc = obd_notify(obd->obd_observer, obd, 1, 0);
1304                 break;
1305         }
1306         default:
1307                 CERROR("Unknown import event %d\n", event);
1308                 LBUG();
1309         }
1310         RETURN(rc);
1311 }
1312
1313 static int mdc_attach(struct obd_device *dev, obd_count len, void *data)
1314 {
1315         struct lprocfs_static_vars lvars;
1316
1317         lprocfs_init_vars(mdc, &lvars);
1318         return lprocfs_obd_attach(dev, lvars.obd_vars);
1319 }
1320
1321 static int mdc_detach(struct obd_device *dev)
1322 {
1323         return lprocfs_obd_detach(dev);
1324 }
1325
1326 static int mdc_setup(struct obd_device *obd, obd_count len, void *buf)
1327 {
1328         struct client_obd *cli = &obd->u.cli;
1329         int rc;
1330         ENTRY;
1331
1332         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1333         if (!cli->cl_rpc_lock)
1334                 RETURN(-ENOMEM);
1335         mdc_init_rpc_lock(cli->cl_rpc_lock);
1336
1337         ptlrpcd_addref();
1338
1339         OBD_ALLOC(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1340         if (!cli->cl_setattr_lock)
1341                 GOTO(err_rpc_lock, rc = -ENOMEM);
1342         mdc_init_rpc_lock(cli->cl_setattr_lock);
1343
1344         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1345         if (!cli->cl_close_lock)
1346                 GOTO(err_setattr_lock, rc = -ENOMEM);
1347         mdc_init_rpc_lock(cli->cl_close_lock);
1348
1349         rc = client_obd_setup(obd, len, buf);
1350         if (rc)
1351                 GOTO(err_close_lock, rc);
1352
1353         rc = obd_llog_init(obd, &obd->obd_llogs, obd, 0, NULL);
1354         if (rc) {
1355                 mdc_cleanup(obd, 0);
1356                 CERROR("failed to setup llogging subsystems\n");
1357         }
1358
1359         RETURN(rc);
1360
1361 err_close_lock:
1362         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1363 err_setattr_lock:
1364         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1365 err_rpc_lock:
1366         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1367         ptlrpcd_decref();
1368         RETURN(rc);
1369 }
1370
1371 static int mdc_init_ea_size(struct obd_export *exp, int easize, int cookiesize)
1372 {
1373         struct obd_device *obd = exp->exp_obd;
1374         struct client_obd *cli = &obd->u.cli;
1375         ENTRY;
1376
1377         if (cli->cl_max_mds_easize < easize)
1378                 cli->cl_max_mds_easize = easize;
1379         if (cli->cl_max_mds_cookiesize < cookiesize)
1380                 cli->cl_max_mds_cookiesize = cookiesize;
1381         RETURN(0);
1382 }
1383
1384 static int mdc_precleanup(struct obd_device *obd, int flags)
1385 {
1386         int rc = 0;
1387
1388         rc = obd_llog_finish(obd, &obd->obd_llogs, 0);
1389         if (rc != 0)
1390                 CERROR("failed to cleanup llogging subsystems\n");
1391
1392         RETURN(rc);
1393 }
1394
1395 static int mdc_cleanup(struct obd_device *obd, int flags)
1396 {
1397         struct client_obd *cli = &obd->u.cli;
1398
1399         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1400         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1401         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1402
1403         ptlrpcd_decref();
1404
1405         return client_obd_cleanup(obd, flags);
1406 }
1407
1408
1409 static int mdc_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
1410                          struct obd_device *tgt, int count,
1411                          struct llog_catid *logid)
1412 {
1413         struct llog_ctxt *ctxt;
1414         int rc;
1415         ENTRY;
1416
1417         rc = obd_llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
1418                             &llog_client_ops);
1419         if (rc == 0) {
1420                 ctxt = llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT);
1421                 ctxt->loc_imp = obd->u.cli.cl_import;
1422         }
1423
1424         RETURN(rc);
1425 }
1426
1427 static int mdc_llog_finish(struct obd_device *obd,
1428                            struct obd_llogs *llogs, int count)
1429 {
1430         int rc;
1431         ENTRY;
1432
1433         rc = obd_llog_cleanup(llog_get_context(llogs, LLOG_CONFIG_REPL_CTXT));
1434         RETURN(rc);
1435 }
1436
1437 static struct obd_device *mdc_get_real_obd(struct obd_export *exp,
1438                                            struct lustre_id *id)
1439 {
1440        ENTRY;
1441        RETURN(exp->exp_obd);
1442 }
1443
1444 static int mdc_get_info(struct obd_export *exp, __u32 keylen,
1445                         void *key, __u32 *valsize, void *val)
1446 {
1447         struct ptlrpc_request *req;
1448         char *bufs[1] = {key};
1449         int rc = 0;
1450         ENTRY;
1451
1452         if (!valsize || !val)
1453                 RETURN(-EFAULT);
1454
1455         if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
1456                 struct obd_import *imp;
1457                 struct obd_connect_data *data;
1458
1459                 imp = class_exp2cliimp(exp);
1460                 if (!imp) {
1461                         LBUG();
1462                         RETURN(-EINVAL);
1463                 }
1464
1465                 if (imp->imp_state != LUSTRE_IMP_FULL) {
1466                         CERROR("import state not full\n");
1467                         RETURN(-EINVAL);
1468                 }
1469
1470                 data = &imp->imp_connect_data;
1471                 if (data->ocd_connect_flags & OBD_CONNECT_REMOTE) {
1472                         *((int *)val) = 1;
1473                         RETURN(0);
1474                 } else if (data->ocd_connect_flags & OBD_CONNECT_LOCAL) {
1475                         *((int *)val) = 0;
1476                         RETURN(0);
1477                 }
1478                 CERROR("no remote flag set?\n");
1479                 RETURN(-EINVAL);
1480         }
1481
1482         if ((keylen < strlen("mdsize") || strcmp(key, "mdsize") != 0) &&
1483             (keylen < strlen("mdsnum") || strcmp(key, "mdsnum") != 0) &&
1484             (keylen < strlen("lovdesc") || strcmp(key, "lovdesc") != 0) &&
1485             (keylen < strlen("getext") || strcmp(key, "getext") != 0) &&
1486             (keylen < strlen("rootid") || strcmp(key, "rootid") != 0) &&
1487             (keylen < strlen("auditid") || strcmp(key, "auditid") != 0))
1488                 RETURN(-EPROTO);
1489
1490         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
1491                               OST_GET_INFO, 1, (int *)&keylen, bufs);
1492         if (req == NULL)
1493                 RETURN(-ENOMEM);
1494
1495         req->rq_replen = lustre_msg_size(1, (int *)valsize);
1496         rc = ptlrpc_queue_wait(req);
1497         if (rc)
1498                 GOTO(out_req, rc);
1499
1500         if ((keylen >= strlen("rootid") && !strcmp(key, "rootid")) ||
1501             (keylen >= strlen("auditid") && !strcmp(key, "auditid"))) {
1502                 struct lustre_id *reply;
1503
1504                 reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
1505                                            lustre_swab_lustre_id);
1506                 if (reply == NULL) {
1507                         CERROR("Can't unpack %s\n", (char *)key);
1508                         GOTO(out_req, rc = -EPROTO);
1509                 }
1510
1511                 *(struct lustre_id *)val = *reply;
1512         } else if (keylen >= strlen("lovdesc") && !strcmp(key, "lovdesc")) {
1513                 struct lov_desc *reply;
1514
1515                 reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
1516                                            lustre_swab_lov_desc);
1517                 if (reply == NULL) {
1518                         CERROR("Can't unpack %s\n", (char *)key);
1519                         GOTO(out_req, rc = -EPROTO);
1520                 }
1521
1522                 *(struct lov_desc *)val = *reply;
1523                 RETURN(0);
1524         } else if (keylen >= strlen("getext") && !strcmp(key, "getext")) {
1525                 struct fid_extent *reply;
1526
1527                 reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
1528                                            lustre_swab_fid_extent);
1529                 if (reply == NULL) {
1530                         CERROR("Can't unpack %s\n", (char *)key);
1531                         GOTO(out_req, rc = -EPROTO);
1532                 }
1533
1534                 *(struct fid_extent *)val = *reply;
1535                 RETURN(0);
1536         } else {
1537                 __u32 *reply;
1538
1539                 reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
1540                                            lustre_swab_generic_32s);
1541                 if (reply == NULL) {
1542                         CERROR("Can't unpack %s\n", (char *)key);
1543                         GOTO(out_req, rc = -EPROTO);
1544                 }
1545                 *((__u32 *)val) = *reply;
1546         }
1547 out_req:
1548         ptlrpc_req_finished(req);
1549         RETURN(rc);
1550 }
1551
1552 int mdc_obj_create(struct obd_export *exp, struct obdo *oa,
1553                    void *acl, int acl_size, struct lov_stripe_md **ea,
1554                    struct obd_trans_info *oti)
1555 {
1556         struct ptlrpc_request *request;
1557         struct ost_body *body;
1558         char *acl_buf;
1559         int rc, size[2] = { sizeof(*body), acl_size };
1560         ENTRY;
1561
1562         LASSERT(oa);
1563
1564         request = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION,
1565                                   OST_CREATE, 2, size, NULL);
1566         if (!request)
1567                 GOTO(out_req, rc = -ENOMEM);
1568
1569         body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
1570         memcpy(&body->oa, oa, sizeof(body->oa));
1571
1572         if (acl_size) {
1573                 acl_buf = lustre_msg_buf(request->rq_reqmsg, 1, acl_size);
1574                 memcpy(acl_buf, acl, acl_size);
1575         }
1576
1577         request->rq_replen = lustre_msg_size(1, size);
1578         rc = ptlrpc_queue_wait(request);
1579         if (rc)
1580                 GOTO(out_req, rc);
1581
1582         body = lustre_swab_repbuf(request, 0, sizeof(*body),
1583                                   lustre_swab_ost_body);
1584         if (body == NULL) {
1585                 CERROR ("can't unpack ost_body\n");
1586                 GOTO (out_req, rc = -EPROTO);
1587         }
1588
1589         memcpy(oa, &body->oa, sizeof(*oa));
1590
1591         /* store ino/generation for recovery */
1592         body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof (*body));
1593         body->oa.o_id = oa->o_id;
1594         body->oa.o_generation = oa->o_generation;
1595         body->oa.o_fid = oa->o_fid;
1596         body->oa.o_mds = oa->o_mds;
1597
1598         CDEBUG(D_HA, "transno: "LPD64"\n", request->rq_repmsg->transno);
1599         EXIT;
1600 out_req:
1601         ptlrpc_req_finished(request);
1602         return rc;
1603 }
1604
1605 int mdc_brw(int rw, struct obd_export *exp, struct obdo *oa,
1606             struct lov_stripe_md *ea, obd_count oa_bufs,
1607             struct brw_page *pgarr, struct obd_trans_info *oti)
1608 {
1609         struct ptlrpc_bulk_desc *desc;
1610         struct niobuf_remote *niobuf;
1611         struct ptlrpc_request *req;
1612         struct obd_ioobj *ioobj;
1613         struct ost_body *body;
1614         int err, opc, i;
1615         int size[3];
1616
1617         opc = ((rw & OBD_BRW_WRITE) != 0) ? OST_WRITE : OST_READ;
1618
1619         size[0] = sizeof(*body);
1620         size[1] = sizeof(*ioobj);
1621         size[2] = oa_bufs * sizeof(*niobuf);
1622
1623         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_OBD_VERSION, opc,
1624                               3, size, NULL);
1625         LASSERT(req != NULL);
1626
1627         if (opc == OST_WRITE)
1628                 desc = ptlrpc_prep_bulk_imp(req, oa_bufs, BULK_GET_SOURCE,
1629                                             OST_BULK_PORTAL);
1630         else
1631                 desc = ptlrpc_prep_bulk_imp(req, oa_bufs, BULK_PUT_SINK,
1632                                             OST_BULK_PORTAL);
1633         LASSERT(desc != NULL);
1634
1635         body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof(*body));
1636         ioobj = lustre_msg_buf(req->rq_reqmsg, 1, sizeof(*ioobj));
1637         niobuf = lustre_msg_buf(req->rq_reqmsg, 2, oa_bufs * sizeof(*niobuf));
1638
1639         memcpy(&body->oa, oa, sizeof(*oa));
1640         obdo_to_ioobj(oa, ioobj);
1641         ioobj->ioo_bufcnt = oa_bufs;
1642
1643         for (i = 0; i < oa_bufs; i++, niobuf++) {
1644                 struct brw_page *pg = &pgarr[i];
1645
1646                 LASSERT(pg->count > 0);
1647                 LASSERT((pg->disk_offset & ~PAGE_MASK) + pg->count <= PAGE_SIZE);
1648
1649                 ptlrpc_prep_bulk_page(desc, pg->pg, pg->disk_offset & ~PAGE_MASK,
1650                                       pg->count);
1651
1652                 niobuf->offset = pg->disk_offset;
1653                 niobuf->len = pg->count;
1654                 niobuf->flags = pg->flag;
1655         }
1656
1657         /* size[0] still sizeof (*body) */
1658         if (opc == OST_WRITE) {
1659                 /* 1 RC per niobuf */
1660                 size[1] = sizeof(__u32) * oa_bufs;
1661                 req->rq_replen = lustre_msg_size(2, size);
1662         } else {
1663                 /* 1 RC for the whole I/O */
1664                 req->rq_replen = lustre_msg_size(1, size);
1665         }
1666         err = ptlrpc_queue_wait(req);
1667         LASSERT(err == 0);
1668
1669         ptlrpc_req_finished(req);
1670         return 0;
1671 }
1672
1673 static int mdc_valid_attrs(struct obd_export *exp,
1674                            struct lustre_id *id)
1675 {
1676         struct ldlm_res_id res_id = { .name = {0} };
1677         struct obd_device *obd = exp->exp_obd;
1678         struct lustre_handle lockh;
1679         ldlm_policy_data_t policy;
1680         int flags;
1681         ENTRY;
1682
1683         res_id.name[0] = id_fid(id);
1684         res_id.name[1] = id_group(id);
1685         policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1686
1687         CDEBUG(D_INFO, "trying to match res "LPU64"\n",
1688                res_id.name[0]);
1689
1690         /* FIXME use LDLM_FL_TEST_LOCK instead */
1691         flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING;
1692         if (ldlm_lock_match(obd->obd_namespace, flags, &res_id,
1693                             LDLM_IBITS, &policy, LCK_PR, &lockh)) {
1694                 ldlm_lock_decref(&lockh, LCK_PR);
1695                 RETURN(1);
1696         }
1697
1698         if (ldlm_lock_match(obd->obd_namespace, flags, &res_id,
1699                             LDLM_IBITS, &policy, LCK_PW, &lockh)) {
1700                 ldlm_lock_decref(&lockh, LCK_PW);
1701                 RETURN(1);
1702         }
1703         RETURN(0);
1704 }
1705
1706 static int mdc_change_cbdata_name(struct obd_export *exp,
1707                                   struct lustre_id *pid,
1708                                   char *name, int len,
1709                                   struct lustre_id *cid,
1710                                   ldlm_iterator_t it, void *data)
1711 {
1712         int rc;
1713         rc = mdc_change_cbdata(exp, cid, it, data);
1714         RETURN(rc);
1715 }
1716
1717 struct obd_ops mdc_obd_ops = {
1718         .o_owner         = THIS_MODULE,
1719         .o_attach        = mdc_attach,
1720         .o_detach        = mdc_detach,
1721         .o_setup         = mdc_setup,
1722         .o_precleanup    = mdc_precleanup,
1723         .o_cleanup       = mdc_cleanup,
1724         .o_add_conn      = client_import_add_conn,
1725         .o_del_conn      = client_import_del_conn,
1726         .o_connect       = client_connect_import,
1727         .o_disconnect    = client_disconnect_export,
1728         .o_iocontrol     = mdc_iocontrol,
1729         .o_packmd        = mdc_packmd,
1730         .o_unpackmd      = mdc_unpackmd,
1731         .o_statfs        = mdc_statfs,
1732         .o_pin           = mdc_pin,
1733         .o_unpin         = mdc_unpin,
1734         .o_import_event  = mdc_import_event,
1735         .o_llog_init     = mdc_llog_init,
1736         .o_llog_finish   = mdc_llog_finish,
1737         .o_create        = mdc_obj_create,
1738         .o_set_info      = mdc_set_info,
1739         .o_get_info      = mdc_get_info,
1740         .o_brw           = mdc_brw,
1741         .o_cancel_unused = mdc_cancel_unused,
1742         .o_init_ea_size  = mdc_init_ea_size,
1743 };
1744
1745 struct md_ops mdc_md_ops = {
1746         .m_getstatus     = mdc_getstatus,
1747         .m_getattr       = mdc_getattr,
1748         .m_close         = mdc_close,
1749         .m_create        = mdc_create,
1750         .m_done_writing  = mdc_done_writing,
1751         .m_enqueue       = mdc_enqueue,
1752         .m_getattr_lock  = mdc_getattr_lock,
1753         .m_intent_lock   = mdc_intent_lock,
1754         .m_link          = mdc_link,
1755         .m_rename        = mdc_rename,
1756         .m_setattr       = mdc_setattr,
1757         .m_sync          = mdc_sync,
1758         .m_readpage      = mdc_readpage,
1759         .m_unlink        = mdc_unlink,
1760         .m_valid_attrs   = mdc_valid_attrs,
1761         .m_req2lustre_md = mdc_req2lustre_md,
1762         .m_set_open_replay_data   = mdc_set_open_replay_data,
1763         .m_clear_open_replay_data = mdc_clear_open_replay_data,
1764         .m_store_inode_generation = mdc_store_inode_generation,
1765         .m_set_lock_data = mdc_set_lock_data,
1766         .m_get_real_obd  = mdc_get_real_obd,
1767         .m_change_cbdata_name = mdc_change_cbdata_name,
1768         .m_change_cbdata = mdc_change_cbdata,
1769         .m_access_check  = mdc_access_check,
1770 };
1771
1772 int __init mdc_init(void)
1773 {
1774         struct lprocfs_static_vars lvars;
1775
1776         lprocfs_init_vars(mdc, &lvars);
1777         return class_register_type(&mdc_obd_ops, &mdc_md_ops,
1778                                    lvars.module_vars, OBD_MDC_DEVICENAME);
1779 }
1780
1781 #ifdef __KERNEL__
1782 static void /*__exit*/ mdc_exit(void)
1783 {
1784         class_unregister_type(OBD_MDC_DEVICENAME);
1785 }
1786
1787 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1788 MODULE_DESCRIPTION("Lustre Metadata Client");
1789 MODULE_LICENSE("GPL");
1790
1791 EXPORT_SYMBOL(mdc_req2lustre_md);
1792 EXPORT_SYMBOL(mdc_req2lustre_capa);
1793 EXPORT_SYMBOL(mdc_change_cbdata);
1794 EXPORT_SYMBOL(mdc_getstatus);
1795 EXPORT_SYMBOL(mdc_getattr);
1796 EXPORT_SYMBOL(mdc_getattr_lock);
1797 EXPORT_SYMBOL(mdc_create);
1798 EXPORT_SYMBOL(mdc_unlink);
1799 EXPORT_SYMBOL(mdc_rename);
1800 EXPORT_SYMBOL(mdc_link);
1801 EXPORT_SYMBOL(mdc_readpage);
1802 EXPORT_SYMBOL(mdc_setattr);
1803 EXPORT_SYMBOL(mdc_close);
1804 EXPORT_SYMBOL(mdc_done_writing);
1805 EXPORT_SYMBOL(mdc_sync);
1806 EXPORT_SYMBOL(mdc_set_open_replay_data);
1807 EXPORT_SYMBOL(mdc_clear_open_replay_data);
1808 EXPORT_SYMBOL(mdc_store_inode_generation);
1809
1810 module_init(mdc_init);
1811 module_exit(mdc_exit);
1812 #endif