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