lustre/mdc/mdc_request.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2001-2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of the Lustre file system, http://www.lustre.org
   7  *   Lustre is a trademark of Cluster File Systems, Inc.
   8  *
   9  *   You may have signed or agreed to another license before downloading
  10  *   this software.  If so, you are bound by the terms and conditions
  11  *   of that agreement, and the following does not apply to you.  See the
  12  *   LICENSE file included with this distribution for more information.
  13  *
  14  *   If you did not agree to a different license, then this copy of Lustre
  15  *   is open source software; you can redistribute it and/or modify it
  16  *   under the terms of version 2 of the GNU General Public License as
  17  *   published by the Free Software Foundation.
  18  *
  19  *   In either case, Lustre is distributed in the hope that it will be
  20  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  21  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *   license text for more details.
  23  */
  24
  25 #ifndef EXPORT_SYMTAB
  26 # define EXPORT_SYMTAB
  27 #endif
  28 #define DEBUG_SUBSYSTEM S_MDC
  29
  30 #ifdef __KERNEL__
  31 # include <linux/module.h>
  32 # include <linux/pagemap.h>
  33 # include <linux/miscdevice.h>
  34 # include <linux/init.h>
  35 #else
  36 # include <liblustre.h>
  37 #endif
  38
  39 #include <linux/lustre_acl.h>
  40 #include <obd_class.h>
  41 #include <lustre_dlm.h>
  42 #include <lustre_fid.h>
  43 #include <md_object.h>
  44 #include <lprocfs_status.h>
  45 #include <lustre_param.h>
  46 #include "mdc_internal.h"
  47
  48 static quota_interface_t *quota_interface;
  49
  50 #define REQUEST_MINOR 244
  51
  52 static quota_interface_t *quota_interface;
  53 extern quota_interface_t mdc_quota_interface;
  54
  55 static int mdc_cleanup(struct obd_device *obd);
  56
  57 static struct obd_capa *mdc_unpack_capa(struct ptlrpc_request *req,
  58                                                unsigned int offset)
  59 {
  60         struct lustre_capa *capa;
  61         struct obd_capa *oc;
  62
  63         /* swabbed already in mdc_enqueue */
  64         capa = lustre_msg_buf(req->rq_repmsg, offset, sizeof(*capa));
  65         if (capa == NULL) {
  66                 CERROR("missing capa at offset %d failed!\n", offset);
  67                 return ERR_PTR(-EFAULT);
  68         }
  69
  70         oc = alloc_capa(CAPA_SITE_CLIENT);
  71         if (!oc) {
  72                 CERROR("alloc capa failed!\n");
  73                 return ERR_PTR(-ENOMEM);
  74         }
  75         oc->c_capa = *capa;
  76
  77         return oc;
  78 }
  79
  80 /* Helper that implements most of mdc_getstatus and signal_completed_replay. */
  81 /* XXX this should become mdc_get_info("key"), sending MDS_GET_INFO RPC */
  82 static int send_getstatus(struct obd_import *imp, struct lu_fid *rootfid,
  83                           struct obd_capa **pc, int level, int msg_flags)
  84 {
  85         struct ptlrpc_request *req;
  86         struct mdt_body *body;
  87         int rc, size[3] = { sizeof(struct ptlrpc_body),
  88                             sizeof(*body),
  89                             sizeof(struct lustre_capa) };
  90         ENTRY;
  91
  92         req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_GETSTATUS, 2, size,
  93                               NULL);
  94         if (!req)
  95                 GOTO(out, rc = -ENOMEM);
  96
  97         req->rq_send_state = level;
  98         ptlrpc_req_set_repsize(req, 3, size);
  99
 100         mdc_pack_req_body(req, REQ_REC_OFF, 0, NULL, NULL, 0, 0);
 101         lustre_msg_add_flags(req->rq_reqmsg, msg_flags);
 102         rc = ptlrpc_queue_wait(req);
 103
 104         if (!rc) {
 105                 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
 106                                           lustre_swab_mdt_body);
 107                 if (body == NULL) {
 108                         CERROR ("Can't extract mdt_body\n");
 109                         GOTO (out, rc = -EPROTO);
 110                 }
 111
 112                 *rootfid = body->fid1;
 113
 114                 if (body->valid & OBD_MD_FLMDSCAPA) {
 115                         struct obd_capa *oc;
 116
 117                         oc = mdc_unpack_capa(req, REPLY_REC_OFF + 1);
 118                         if (IS_ERR(oc))
 119                                 GOTO(out, rc = PTR_ERR(oc));
 120                         *pc = oc;
 121                 }
 122
 123                 CDEBUG(D_NET, "root fid="DFID", last_committed="LPU64
 124                        ", last_xid="LPU64"\n",
 125                        PFID(rootfid),
 126                        lustre_msg_get_last_committed(req->rq_repmsg),
 127                        lustre_msg_get_last_xid(req->rq_repmsg));
 128         }
 129
 130         EXIT;
 131  out:
 132         ptlrpc_req_finished(req);
 133         return rc;
 134 }
 135
 136 /* This should be mdc_get_info("rootfid") */
 137 int mdc_getstatus(struct obd_export *exp, struct lu_fid *rootfid,
 138                   struct obd_capa **pc)
 139 {
 140         return send_getstatus(class_exp2cliimp(exp), rootfid, pc,
 141                               LUSTRE_IMP_FULL, 0);
 142 }
 143
 144 /*
 145  * This function now is known to always saying that it will receive 4 buffers
 146  * from server. Even for cases when acl_size and md_size is zero, RPC header
 147  * willcontain 4 fields and RPC itself will contain zero size fields. This is
 148  * because mdt_getattr*() _always_ returns 4 fields, but if acl is not needed
 149  * and thus zero, it shirinks it, making zero size. The same story about
 150  * md_size. And this is course of problem when client waits for smaller number
 151  * of fields. This issue will be fixed later when client gets awar of RPC
 152  * layouts.  --umka
 153  */
 154 static int mdc_getattr_common(struct obd_export *exp, unsigned int ea_size,
 155                               unsigned int acl_size, int mdscapa,
 156                               struct ptlrpc_request *req)
 157 {
 158         struct mdt_body *body;
 159         void *eadata;
 160         int size[5] = { sizeof(struct ptlrpc_body),
 161                         sizeof(*body),
 162                         ea_size,
 163                         acl_size,
 164                         sizeof(struct lustre_capa) };
 165         int offset, rc;
 166         ENTRY;
 167
 168         /* Request message already built. */
 169         if (ea_size)
 170                 CDEBUG(D_INODE, "reserved %u bytes for MD/symlink in packet\n",
 171                        ea_size);
 172         if (acl_size)
 173                 CDEBUG(D_INODE, "reserved %u bytes for ACL\n", acl_size);
 174
 175         ptlrpc_req_set_repsize(req, 5, size);
 176
 177         rc = ptlrpc_queue_wait(req);
 178         if (rc != 0)
 179                 RETURN (rc);
 180
 181         body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
 182                                   lustre_swab_mdt_body);
 183         if (body == NULL) {
 184                 CERROR ("Can't unpack mdt_body\n");
 185                 RETURN (-EPROTO);
 186         }
 187
 188         CDEBUG(D_NET, "mode: %o\n", body->mode);
 189
 190         offset = REPLY_REC_OFF + 1;
 191         LASSERT_REPSWAB(req, offset);
 192         if (body->eadatasize != 0) {
 193                 /* reply indicates presence of eadata; check it's there... */
 194                 eadata = lustre_msg_buf(req->rq_repmsg, offset++,
 195                                         body->eadatasize);
 196                 if (eadata == NULL) {
 197                         CERROR ("Missing/short eadata\n");
 198                         RETURN (-EPROTO);
 199                 }
 200         }
 201
 202         if (body->valid & OBD_MD_FLMODEASIZE) {
 203                 struct client_obd *cli = &exp->exp_obd->u.cli;
 204
 205                 if (cli->cl_max_mds_easize < body->max_mdsize)
 206                         cli->cl_max_mds_easize = body->max_mdsize;
 207                 if (cli->cl_max_mds_cookiesize < body->max_cookiesize)
 208                         cli->cl_max_mds_cookiesize = body->max_cookiesize;
 209         }
 210
 211         offset += !!body->aclsize;
 212
 213         if (body->valid & OBD_MD_FLMDSCAPA) {
 214                 struct lustre_capa *capa;
 215
 216                 LASSERT(mdscapa);
 217                 capa = lustre_unpack_capa(req->rq_repmsg, offset++);
 218                 if (capa == NULL) {
 219                         CERROR("Missing/short client MDS capability\n");
 220                         RETURN(-EPROTO);
 221                 }
 222         }
 223
 224         RETURN (0);
 225 }
 226
 227 int mdc_getattr(struct obd_export *exp, const struct lu_fid *fid,
 228                 struct obd_capa *oc, obd_valid valid, int ea_size,
 229                 struct ptlrpc_request **request)
 230 {
 231         struct ptlrpc_request *req;
 232         int size[3] = { sizeof(struct ptlrpc_body), sizeof(struct mdt_body) };
 233         int acl_size = 0, rc;
 234         ENTRY;
 235
 236         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
 237
 238         /*
 239          * XXX: Do we need to make another request here?  We just did a getattr
 240          * to do the lookup in the first place.
 241          */
 242         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 243                               MDS_GETATTR, 3, size, NULL);
 244         if (!req)
 245                 GOTO(out, rc = -ENOMEM);
 246
 247         mdc_pack_req_body(req, REQ_REC_OFF, valid, fid, oc, ea_size,
 248                           MDS_BFLAG_EXT_FLAGS/*request "new" flags(bug 9486)*/);
 249
 250         if (valid & OBD_MD_FLRMTPERM)
 251                 acl_size = sizeof(struct mdt_remote_perm);
 252
 253         /* Currently only root inode will call us with FLACL */
 254         else if (valid & OBD_MD_FLACL)
 255                 acl_size = LUSTRE_POSIX_ACL_MAX_SIZE;
 256
 257         rc = mdc_getattr_common(exp, ea_size, acl_size,
 258                                 !!(valid & OBD_MD_FLMDSCAPA), req);
 259         if (rc != 0) {
 260                 ptlrpc_req_finished (req);
 261                 req = NULL;
 262         }
 263  out:
 264         *request = req;
 265         RETURN (rc);
 266 }
 267
 268 int mdc_getattr_name(struct obd_export *exp, const struct lu_fid *fid,
 269                      struct obd_capa *oc, const char *filename, int namelen,
 270                      obd_valid valid, int ea_size,
 271                      struct ptlrpc_request **request)
 272 {
 273         struct ptlrpc_request *req;
 274         struct mdt_body *body;
 275         int size[4] = { sizeof(struct ptlrpc_body), sizeof(*body), 0, namelen};
 276         int rc;
 277         ENTRY;
 278
 279         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
 280
 281         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 282                               MDS_GETATTR_NAME, 4, size, NULL);
 283         if (!req)
 284                 GOTO(out, rc = -ENOMEM);
 285
 286         mdc_pack_req_body(req, REQ_REC_OFF, valid, fid, oc, ea_size,
 287                           MDS_BFLAG_EXT_FLAGS/*request "new" flags(bug 9486)*/);
 288
 289         if (filename) {
 290                 LASSERT(strnlen(filename, namelen) == namelen - 1);
 291                 memcpy(lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2, namelen),
 292                        filename, namelen);
 293         }
 294
 295         rc = mdc_getattr_common(exp, ea_size, 0, !!(valid & OBD_MD_FLMDSCAPA),
 296                                 req);
 297         if (rc != 0) {
 298                 ptlrpc_req_finished (req);
 299                 req = NULL;
 300         }
 301  out:
 302         *request = req;
 303         RETURN(rc);
 304 }
 305
 306 static int mdc_is_subdir(struct obd_export *exp, const struct lu_fid *pfid,
 307                          const struct lu_fid *cfid, struct ptlrpc_request **request)
 308 {
 309         int size[2] = { sizeof(struct ptlrpc_body),
 310                         sizeof(struct mdt_body) };
 311         struct ptlrpc_request *req;
 312         struct mdt_body *body;
 313         int rc;
 314         ENTRY;
 315
 316         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 317                               MDS_IS_SUBDIR, 2, size, NULL);
 318         if (!req)
 319                 GOTO(out, rc = -ENOMEM);
 320
 321         mdc_is_subdir_pack(req, REQ_REC_OFF, pfid, cfid, 0);
 322
 323         ptlrpc_req_set_repsize(req, 2, size);
 324         rc = ptlrpc_queue_wait(req);
 325         if (rc != 0 && rc != -EREMOTE)
 326                 GOTO(out, rc);
 327
 328         body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
 329                                   lustre_swab_mdt_body);
 330         if (body == NULL) {
 331                 CERROR ("Can't unpack mdt_body\n");
 332                 GOTO(out, rc = -EPROTO);
 333         }
 334         EXIT;
 335  out:
 336         *request = req;
 337         return rc;
 338 }
 339
 340 static
 341 int mdc_xattr_common(struct obd_export *exp, const struct lu_fid *fid,
 342                      struct obd_capa *oc,
 343                      int opcode, obd_valid valid, const char *xattr_name,
 344                      const char *input, int input_size, int output_size,
 345                      int flags, struct ptlrpc_request **request)
 346 {
 347         struct ptlrpc_request *req;
 348         int size[5] = { sizeof(struct ptlrpc_body), sizeof(struct mdt_body) };
 349         int bufcnt = 3, offset = REQ_REC_OFF + 2;
 350         int rc, xattr_namelen = 0, remote_acl = 0;
 351         void *tmp;
 352         ENTRY;
 353
 354         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
 355         if (xattr_name) {
 356                 xattr_namelen = strlen(xattr_name) + 1;
 357                 size[bufcnt++] = xattr_namelen;
 358         }
 359         if (input_size) {
 360                 LASSERT(input);
 361                 size[bufcnt++] = input_size;
 362         }
 363
 364         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 365                               opcode, bufcnt, size, NULL);
 366         if (!req)
 367                 GOTO(out, rc = -ENOMEM);
 368
 369         /* request data */
 370         mdc_pack_req_body(req, REQ_REC_OFF, valid, fid, oc, output_size, flags);
 371
 372
 373         if (xattr_name) {
 374                 tmp = lustre_msg_buf(req->rq_reqmsg, offset++, xattr_namelen);
 375                 memcpy(tmp, xattr_name, xattr_namelen);
 376                 if (!strcmp(xattr_name, XATTR_NAME_LUSTRE_ACL))
 377                         remote_acl = 1;
 378         }
 379         if (input_size) {
 380                 tmp = lustre_msg_buf(req->rq_reqmsg, offset++, input_size);
 381                 memcpy(tmp, input, input_size);
 382         }
 383
 384         /* reply buffers */
 385         if (opcode == MDS_GETXATTR) {
 386                 size[REPLY_REC_OFF] = sizeof(struct mdt_body);
 387                 bufcnt = 2;
 388         } else {
 389                 bufcnt = 1;
 390         }
 391
 392         /* we do this even output_size is 0, because server is doing that */
 393         size[bufcnt++] = output_size;
 394         ptlrpc_req_set_repsize(req, bufcnt, size);
 395
 396         /* make rpc */
 397         /* NB: set remote acl doesn't need hold rpc lock, because it just
 398          * send command to MDS, and when it's executed on mountpoint on MDS,
 399          * another mdc_xattr_common() will be invoked there. */
 400         if (opcode == MDS_SETXATTR && !remote_acl)
 401                 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 402
 403         rc = ptlrpc_queue_wait(req);
 404
 405         if (opcode == MDS_SETXATTR && !remote_acl)
 406                 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 407
 408         if (rc != 0)
 409                 GOTO(err_out, rc);
 410
 411         if (opcode == MDS_GETXATTR) {
 412                 struct mdt_body * body = lustre_swab_repbuf(req, REPLY_REC_OFF,
 413                                           sizeof(*body), lustre_swab_mdt_body);
 414                 if (body == NULL) {
 415                         CERROR ("Can't unpack mdt_body\n");
 416                         GOTO(err_out, rc = -EPROTO);
 417                 }
 418         }
 419 out:
 420         *request = req;
 421         RETURN (rc);
 422 err_out:
 423         ptlrpc_req_finished(req);
 424         req = NULL;
 425         goto out;
 426 }
 427
 428 int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
 429                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 430                  const char *input, int input_size, int output_size, int flags,
 431                  struct ptlrpc_request **request)
 432 {
 433         return mdc_xattr_common(exp, fid, oc, MDS_SETXATTR, valid, xattr_name,
 434                                 input, input_size, output_size, flags, request);
 435 }
 436
 437 int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
 438                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 439                  const char *input, int input_size, int output_size, int flags,
 440                  struct ptlrpc_request **request)
 441 {
 442         return mdc_xattr_common(exp, fid, oc, MDS_GETXATTR, valid, xattr_name,
 443                                 input, input_size, output_size, flags, request);
 444 }
 445
 446 #ifdef CONFIG_FS_POSIX_ACL
 447 static
 448 int mdc_unpack_acl(struct obd_export *exp, struct ptlrpc_request *req,
 449                    struct lustre_md *md, unsigned int offset)
 450 {
 451         struct mdt_body  *body = md->body;
 452         struct posix_acl *acl;
 453         void             *buf;
 454         int               rc;
 455
 456         if (!body->aclsize)
 457                 return 0;
 458
 459         buf = lustre_msg_buf(req->rq_repmsg, offset, body->aclsize);
 460         if (!buf) {
 461                 CERROR("aclsize %u, bufcount %u, bufsize %u\n",
 462                        body->aclsize, lustre_msg_bufcount(req->rq_repmsg),
 463                        (lustre_msg_bufcount(req->rq_repmsg) <= offset) ?
 464                                 -1 : lustre_msg_buflen(req->rq_repmsg, offset));
 465                 return -EPROTO;
 466         }
 467
 468         acl = posix_acl_from_xattr(buf, body->aclsize);
 469         if (IS_ERR(acl)) {
 470                 rc = PTR_ERR(acl);
 471                 CERROR("convert xattr to acl: %d\n", rc);
 472                 return rc;
 473         }
 474
 475         rc = posix_acl_valid(acl);
 476         if (rc) {
 477                 CERROR("validate acl: %d\n", rc);
 478                 posix_acl_release(acl);
 479                 return rc;
 480         }
 481
 482         md->posix_acl = acl;
 483         return 0;
 484 }
 485 #else
 486 #define mdc_unpack_acl(exp, req, md, offset) 0
 487 #endif
 488
 489 int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
 490                       int offset, struct obd_export *dt_exp,
 491                       struct obd_export *md_exp,
 492                       struct lustre_md *md)
 493 {
 494         int rc;
 495         ENTRY;
 496
 497         LASSERT(md);
 498         memset(md, 0, sizeof(*md));
 499
 500         md->body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*md->body));
 501         LASSERT (md->body != NULL);
 502         LASSERT_REPSWABBED(req, offset);
 503         offset++;
 504
 505         if (md->body->valid & OBD_MD_FLEASIZE) {
 506                 int lmmsize;
 507                 struct lov_mds_md *lmm;
 508
 509                 LASSERT(S_ISREG(md->body->mode));
 510
 511                 if (md->body->eadatasize == 0) {
 512                         CERROR("OBD_MD_FLEASIZE set, but eadatasize 0\n");
 513                         RETURN(-EPROTO);
 514                 }
 515                 lmmsize = md->body->eadatasize;
 516                 lmm = lustre_msg_buf(req->rq_repmsg, offset, lmmsize);
 517                 LASSERT (lmm != NULL);
 518                 LASSERT_REPSWABBED(req, offset);
 519
 520                 rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize);
 521                 if (rc < 0)
 522                         RETURN(rc);
 523
 524                 LASSERT (rc >= sizeof (*md->lsm));
 525                 offset++;
 526         } else if (md->body->valid & OBD_MD_FLDIREA) {
 527                 int lmvsize;
 528                 struct lov_mds_md *lmv;
 529
 530                 LASSERT(S_ISDIR(md->body->mode));
 531
 532                 if (md->body->eadatasize == 0) {
 533                         CERROR("OBD_MD_FLEASIZE is set, but eadatasize 0\n");
 534                         RETURN(-EPROTO);
 535                 }
 536                 if (md->body->valid & OBD_MD_MEA) {
 537                         lmvsize = md->body->eadatasize;
 538                         lmv = lustre_msg_buf(req->rq_repmsg, offset, lmvsize);
 539                         LASSERT (lmv != NULL);
 540                         LASSERT_REPSWABBED(req, offset);
 541
 542                         rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
 543                                           lmvsize);
 544                         if (rc < 0)
 545                                 RETURN(rc);
 546
 547                         LASSERT (rc >= sizeof (*md->mea));
 548                 }
 549                 offset++;
 550         }
 551         rc = 0;
 552
 553         /* remote permission */
 554         if (md->body->valid & OBD_MD_FLRMTPERM) {
 555                 md->remote_perm = lustre_msg_buf(req->rq_repmsg, offset++,
 556                                                 sizeof(struct mdt_remote_perm));
 557                 LASSERT(md->remote_perm);
 558         }
 559
 560         /* for ACL, it's possible that FLACL is set but aclsize is zero.  only
 561          * when aclsize != 0 there's an actual segment for ACL in reply
 562          * buffer. */
 563         else if (md->body->valid & OBD_MD_FLACL) {
 564                 if (md->body->aclsize) {
 565                         rc = mdc_unpack_acl(dt_exp, req, md, offset++);
 566                         if (rc)
 567                                 GOTO(out, rc);
 568 #ifdef CONFIG_FS_POSIX_ACL
 569                 } else {
 570                         md->posix_acl = NULL;
 571 #endif
 572                 }
 573         }
 574
 575         if (md->body->valid & OBD_MD_FLMDSCAPA) {
 576                 struct obd_capa *oc = mdc_unpack_capa(req, offset++);
 577
 578                 if (IS_ERR(oc))
 579                         GOTO(out, rc = PTR_ERR(oc));
 580                 md->mds_capa = oc;
 581         }
 582
 583         if (md->body->valid & OBD_MD_FLOSSCAPA) {
 584                 struct obd_capa *oc = mdc_unpack_capa(req, offset++);
 585
 586                 if (IS_ERR(oc))
 587                         GOTO(out, rc = PTR_ERR(oc));
 588                 md->oss_capa = oc;
 589         }
 590
 591         EXIT;
 592 out:
 593         if (rc) {
 594                 if (md->oss_capa)
 595                         free_capa(md->oss_capa);
 596                 if (md->mds_capa)
 597                         free_capa(md->mds_capa);
 598 #ifdef CONFIG_FS_POSIX_ACL
 599                 posix_acl_release(md->posix_acl);
 600 #endif
 601                 if (md->lsm)
 602                         obd_free_memmd(dt_exp, &md->lsm);
 603         }
 604         return rc;
 605 }
 606
 607 int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
 608 {
 609         ENTRY;
 610         RETURN(0);
 611 }
 612
 613 static void mdc_commit_open(struct ptlrpc_request *req)
 614 {
 615         struct mdc_open_data *mod = req->rq_cb_data;
 616         if (mod == NULL)
 617                 return;
 618
 619         if (mod->mod_close_req != NULL)
 620                 mod->mod_close_req->rq_cb_data = NULL;
 621
 622         if (mod->mod_och != NULL)
 623                 mod->mod_och->och_mod = NULL;
 624
 625         OBD_FREE(mod, sizeof(*mod));
 626         req->rq_cb_data = NULL;
 627 }
 628
 629 static void mdc_replay_open(struct ptlrpc_request *req)
 630 {
 631         struct mdc_open_data *mod = req->rq_cb_data;
 632         struct ptlrpc_request *close_req;
 633         struct obd_client_handle *och;
 634         struct lustre_handle old;
 635         struct mdt_body *body;
 636         ENTRY;
 637
 638         if (mod == NULL) {
 639                 DEBUG_REQ(D_ERROR, req,
 640                           "Can't properly replay without open data.");
 641                 EXIT;
 642                 return;
 643         }
 644
 645         body = lustre_swab_repbuf(req, DLM_REPLY_REC_OFF, sizeof(*body),
 646                                   lustre_swab_mdt_body);
 647
 648         och = mod->mod_och;
 649         if (och != NULL) {
 650                 struct lustre_handle *file_fh;
 651
 652                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 653                 LASSERT(body != NULL);
 654
 655                 file_fh = &och->och_fh;
 656                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 657                        file_fh->cookie, body->handle.cookie);
 658                 memcpy(&old, file_fh, sizeof(old));
 659                 memcpy(file_fh, &body->handle, sizeof(*file_fh));
 660         }
 661         close_req = mod->mod_close_req;
 662         if (close_req != NULL) {
 663                 struct mdt_epoch *epoch;
 664
 665                 LASSERT(lustre_msg_get_opc(close_req->rq_reqmsg) == MDS_CLOSE);
 666                 LASSERT(body != NULL);
 667
 668                 epoch = lustre_msg_buf(close_req->rq_reqmsg, REQ_REC_OFF,
 669                                        sizeof(*epoch));
 670                 LASSERT(epoch);
 671                 if (och != NULL)
 672                         LASSERT(!memcmp(&old, &epoch->handle, sizeof(old)));
 673                 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
 674                 memcpy(&epoch->handle, &body->handle, sizeof(epoch->handle));
 675         }
 676         EXIT;
 677 }
 678
 679 int mdc_set_open_replay_data(struct obd_export *exp,
 680                              struct obd_client_handle *och,
 681                              struct ptlrpc_request *open_req)
 682 {
 683         struct mdc_open_data *mod;
 684         struct mdt_rec_create *rec = lustre_msg_buf(open_req->rq_reqmsg,
 685                                                     DLM_INTENT_REC_OFF,
 686                                                     sizeof(*rec));
 687         struct mdt_body *body = lustre_msg_buf(open_req->rq_repmsg,
 688                                                DLM_REPLY_REC_OFF,
 689                                                sizeof(*body));
 690         struct obd_import *imp = open_req->rq_import;
 691         ENTRY;
 692
 693         LASSERT(rec != NULL);
 694
 695         /* Incoming message in my byte order (it's been swabbed). */
 696         LASSERT_REPSWABBED(open_req, DLM_REPLY_REC_OFF);
 697
 698         /* Outgoing messages always in my byte order. */
 699         LASSERT(body != NULL);
 700
 701         /*Only the import is replayable, we set replay_open data */
 702         if (och && imp->imp_replayable) {
 703                 OBD_ALLOC(mod, sizeof(*mod));
 704                 if (mod == NULL) {
 705                         DEBUG_REQ(D_ERROR, open_req,
 706                                   "Can't allocate mdc_open_data");
 707                         RETURN(0);
 708                 }
 709
 710                 spin_lock(&open_req->rq_lock);
 711                 if (!open_req->rq_replay) {
 712                         OBD_FREE(mod, sizeof(*mod));
 713                         spin_unlock(&open_req->rq_lock);
 714                         RETURN(0);
 715                 }
 716
 717                 och->och_mod = mod;
 718                 mod->mod_och = och;
 719                 open_req->rq_cb_data = mod;
 720                 mod->mod_open_req = open_req;
 721                 open_req->rq_commit_cb = mdc_commit_open;
 722                 spin_unlock(&open_req->rq_lock);
 723         }
 724
 725         rec->cr_fid2 = body->fid1;
 726         rec->cr_ioepoch = body->ioepoch;
 727         rec->cr_old_handle.cookie = body->handle.cookie;
 728         open_req->rq_replay_cb = mdc_replay_open;
 729         if (!fid_is_sane(&body->fid1)) {
 730                 DEBUG_REQ(D_ERROR, open_req, "Saving replay request with "
 731                           "insane fid");
 732                 LBUG();
 733         }
 734
 735         DEBUG_REQ(D_HA, open_req, "Set up open replay data");
 736         RETURN(0);
 737 }
 738
 739 int mdc_clear_open_replay_data(struct obd_export *exp,
 740                                struct obd_client_handle *och)
 741 {
 742         struct mdc_open_data *mod = och->och_mod;
 743         ENTRY;
 744
 745         /*
 746          * Don't free the structure now (it happens in mdc_commit_open(), after
 747          * we're sure we won't need to fix up the close request in the future),
 748          * but make sure that replay doesn't poke at the och, which is about to
 749          * be freed.
 750          */
 751         LASSERT(mod != LP_POISON);
 752         if (mod != NULL)
 753                 mod->mod_och = NULL;
 754
 755         och->och_mod = NULL;
 756         RETURN(0);
 757 }
 758
 759 static void mdc_commit_close(struct ptlrpc_request *req)
 760 {
 761         struct mdc_open_data *mod = req->rq_cb_data;
 762         struct ptlrpc_request *open_req;
 763         struct obd_import *imp = req->rq_import;
 764
 765         DEBUG_REQ(D_HA, req, "close req committed");
 766         if (mod == NULL)
 767                 return;
 768
 769         mod->mod_close_req = NULL;
 770         req->rq_cb_data = NULL;
 771         req->rq_commit_cb = NULL;
 772
 773         open_req = mod->mod_open_req;
 774         LASSERT(open_req != NULL);
 775         LASSERT(open_req != LP_POISON);
 776         LASSERT(open_req->rq_type != LI_POISON);
 777
 778         DEBUG_REQ(D_HA, open_req, "open req balanced");
 779         LASSERT(open_req->rq_transno != 0);
 780         LASSERT(open_req->rq_import == imp);
 781
 782         /*
 783          * We no longer want to preserve this for transno-unconditional
 784          * replay. Decref open req here as well.
 785          */
 786         spin_lock(&open_req->rq_lock);
 787         open_req->rq_replay = 0;
 788         spin_unlock(&open_req->rq_lock);
 789 }
 790
 791 int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 792               struct obd_client_handle *och, struct ptlrpc_request **request)
 793 {
 794         struct obd_device *obd = class_exp2obd(exp);
 795         int reqsize[4] = { sizeof(struct ptlrpc_body),
 796                            sizeof(struct mdt_epoch),
 797                            sizeof(struct mdt_rec_setattr)};
 798         int repsize[4] = { sizeof(struct ptlrpc_body),
 799                            sizeof(struct mdt_body),
 800                            obd->u.cli.cl_max_mds_easize,
 801                            obd->u.cli.cl_max_mds_cookiesize };
 802         struct ptlrpc_request *req;
 803         struct mdc_open_data *mod;
 804         int rc;
 805         ENTRY;
 806
 807         reqsize[REQ_REC_OFF + 2] = op_data->op_capa1 ?
 808                                         sizeof(struct lustre_capa) : 0;
 809         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 810                               MDS_CLOSE, 4, reqsize, NULL);
 811         if (req == NULL)
 812                 GOTO(out, rc = -ENOMEM);
 813
 814         /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
 815          * portal whose threads are not taking any DLM locks and are therefore
 816          * always progressing */
 817         /* XXX FIXME bug 249 */
 818         req->rq_request_portal = MDS_READPAGE_PORTAL;
 819
 820         /* Ensure that this close's handle is fixed up during replay. */
 821         LASSERT(och != NULL);
 822         LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 823         mod = och->och_mod;
 824         if (likely(mod != NULL)) {
 825                 if (mod->mod_open_req->rq_type == LI_POISON) {
 826                         CERROR("LBUG POISONED open %p!\n", mod->mod_open_req);
 827                         LBUG();
 828                         ptlrpc_req_finished(req);
 829                         req = NULL;
 830                         GOTO(out, rc = -EIO);
 831                 }
 832                 mod->mod_close_req = req;
 833                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open");
 834         } else {
 835                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 836         }
 837
 838         mdc_close_pack(req, REQ_REC_OFF, op_data);
 839         ptlrpc_req_set_repsize(req, 4, repsize);
 840         req->rq_commit_cb = mdc_commit_close;
 841         LASSERT(req->rq_cb_data == NULL);
 842         req->rq_cb_data = mod;
 843
 844         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 845         rc = ptlrpc_queue_wait(req);
 846         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 847
 848         if (req->rq_repmsg == NULL) {
 849                 CDEBUG(D_HA, "request failed to send: %p, %d\n", req,
 850                        req->rq_status);
 851                 if (rc == 0)
 852                         rc = req->rq_status ? req->rq_status : -EIO;
 853         } else if (rc == 0 || rc == -EAGAIN) {
 854                 rc = lustre_msg_get_status(req->rq_repmsg);
 855                 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
 856                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
 857                                   "= %d", rc);
 858                         if (rc > 0)
 859                                 rc = -rc;
 860                 } else if (mod == NULL) {
 861                         if (req->rq_import->imp_replayable)
 862                                 CERROR("Unexpected: can't find mdc_open_data,"
 863                                        "but close succeeded with replayable imp"
 864                                        "Please tell CFS.\n");
 865                 }
 866                 if (!lustre_swab_repbuf(req, REPLY_REC_OFF,
 867                                         sizeof(struct mdt_body),
 868                                         lustre_swab_mdt_body)) {
 869                         CERROR("Error unpacking mdt_body\n");
 870                         rc = -EPROTO;
 871                 }
 872         }
 873
 874         EXIT;
 875         *request = req;
 876  out:
 877         if (rc != 0 && rc != -EAGAIN && req && req->rq_commit_cb)
 878                 req->rq_commit_cb(req);
 879
 880         return rc;
 881 }
 882
 883 int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 884                      struct obd_client_handle *och)
 885 {
 886         struct obd_device *obd = class_exp2obd(exp);
 887         struct ptlrpc_request *req;
 888         int size[4] = { sizeof(struct ptlrpc_body),
 889                         sizeof(struct mdt_epoch),
 890                         sizeof(struct mdt_rec_setattr)};
 891         int repsize[2] = { sizeof(struct ptlrpc_body),
 892                            sizeof(struct mdt_body)};
 893         int rc;
 894         ENTRY;
 895
 896         if (op_data->op_capa1)
 897                 size[REQ_REC_OFF + 2] = sizeof(struct lustre_capa);
 898         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 899                               MDS_DONE_WRITING, 4, size, NULL);
 900         if (req == NULL)
 901                 RETURN(-ENOMEM);
 902
 903         /* XXX: add DONE_WRITING request to och -- when Size-on-MDS
 904          * recovery will be ready. */
 905         mdc_close_pack(req, REQ_REC_OFF, op_data);
 906
 907         ptlrpc_req_set_repsize(req, 2, repsize);
 908         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 909         rc = ptlrpc_queue_wait(req);
 910         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 911         ptlrpc_req_finished(req);
 912         RETURN(rc);
 913 }
 914
 915 #ifdef HAVE_SPLIT_SUPPORT
 916 int mdc_sendpage(struct obd_export *exp, const struct lu_fid *fid,
 917                  const struct page *page, int offset)
 918 {
 919         int rc, size[3] = { sizeof(struct ptlrpc_body), sizeof(struct mdt_body) };
 920         struct obd_import *imp = class_exp2cliimp(exp);
 921         struct ptlrpc_bulk_desc *desc = NULL;
 922         struct ptlrpc_request *req = NULL;
 923         ENTRY;
 924
 925         CDEBUG(D_INODE, "object: "DFID"\n", PFID(fid));
 926
 927         req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_WRITEPAGE, 3,
 928                               size, NULL);
 929         if (req == NULL)
 930                 GOTO(out, rc = -ENOMEM);
 931
 932         req->rq_request_portal = MDS_READPAGE_PORTAL;
 933
 934         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_GET_SOURCE, MDS_BULK_PORTAL);
 935         if (desc == NULL)
 936                 GOTO(out, rc = -ENOMEM);
 937
 938         /* NB req now owns desc and will free it when it gets freed. */
 939         ptlrpc_prep_bulk_page(desc, (struct page *)page, 0, offset);
 940         mdc_readdir_pack(req, REQ_REC_OFF, 0, offset, fid, NULL);
 941
 942         ptlrpc_req_set_repsize(req, 2, size);
 943         rc = ptlrpc_queue_wait(req);
 944         EXIT;
 945 out:
 946         if (req != NULL)
 947                 ptlrpc_req_finished(req);
 948         return rc;
 949 }
 950 EXPORT_SYMBOL(mdc_sendpage);
 951 #endif
 952
 953 int mdc_readpage(struct obd_export *exp, const struct lu_fid *fid,
 954                  struct obd_capa *oc, __u64 offset, struct page *page,
 955                  struct ptlrpc_request **request)
 956 {
 957         int rc, size[3] = { sizeof(struct ptlrpc_body), sizeof(struct mdt_body) };
 958         struct obd_import *imp = class_exp2cliimp(exp);
 959         struct ptlrpc_bulk_desc *desc = NULL;
 960         struct ptlrpc_request *req = NULL;
 961         struct mdt_body *body;
 962         ENTRY;
 963
 964         CDEBUG(D_INODE, "object: "DFID"\n", PFID(fid));
 965
 966         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
 967         req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_READPAGE, 3, size,
 968                               NULL);
 969         if (req == NULL)
 970                 GOTO(out, rc = -ENOMEM);
 971
 972         /* XXX FIXME bug 249 */
 973         req->rq_request_portal = MDS_READPAGE_PORTAL;
 974
 975         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_PUT_SINK, MDS_BULK_PORTAL);
 976         if (desc == NULL)
 977                 GOTO(out, rc = -ENOMEM);
 978
 979         /* NB req now owns desc and will free it when it gets freed */
 980         ptlrpc_prep_bulk_page(desc, page, 0, CFS_PAGE_SIZE);
 981         mdc_readdir_pack(req, REQ_REC_OFF, offset, CFS_PAGE_SIZE, fid, oc);
 982
 983         ptlrpc_req_set_repsize(req, 2, size);
 984         rc = ptlrpc_queue_wait(req);
 985
 986         if (rc == 0) {
 987                 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
 988                                           lustre_swab_mdt_body);
 989                 if (body == NULL) {
 990                         CERROR("Can't unpack mdt_body\n");
 991                         GOTO(out, rc = -EPROTO);
 992                 }
 993
 994                 if (req->rq_bulk->bd_nob_transferred != CFS_PAGE_SIZE) {
 995                         CERROR ("Unexpected # bytes transferred: %d"
 996                                 " (%ld expected)\n",
 997                                 req->rq_bulk->bd_nob_transferred,
 998                                 CFS_PAGE_SIZE);
 999                         GOTO(out, rc = -EPROTO);
1000                 }
1001         }
1002
1003         EXIT;
1004  out:
1005         *request = req;
1006         return rc;
1007 }
1008
1009 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1010                          void *karg, void *uarg)
1011 {
1012         struct obd_device *obd = exp->exp_obd;
1013         struct obd_ioctl_data *data = karg;
1014         struct obd_import *imp = obd->u.cli.cl_import;
1015         struct llog_ctxt *ctxt;
1016         int rc;
1017         ENTRY;
1018
1019 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1020         MOD_INC_USE_COUNT;
1021 #else
1022         if (!try_module_get(THIS_MODULE)) {
1023                 CERROR("Can't get module. Is it alive?");
1024                 return -EINVAL;
1025         }
1026 #endif
1027         switch (cmd) {
1028         case OBD_IOC_CLIENT_RECOVER:
1029                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1);
1030                 if (rc < 0)
1031                         GOTO(out, rc);
1032                 GOTO(out, rc = 0);
1033         case IOC_OSC_SET_ACTIVE:
1034                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
1035                 GOTO(out, rc);
1036         case OBD_IOC_PARSE: {
1037                 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
1038                 rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
1039                 GOTO(out, rc);
1040         }
1041 #ifdef __KERNEL__
1042         case OBD_IOC_LLOG_INFO:
1043         case OBD_IOC_LLOG_PRINT: {
1044                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1045                 rc = llog_ioctl(ctxt, cmd, data);
1046
1047                 GOTO(out, rc);
1048         }
1049 #endif
1050         case OBD_IOC_POLL_QUOTACHECK:
1051                 rc = lquota_poll_check(quota_interface, exp,
1052                                        (struct if_quotacheck *)karg);
1053                 GOTO(out, rc);
1054         default:
1055                 CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd);
1056                 GOTO(out, rc = -ENOTTY);
1057         }
1058 out:
1059 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
1060         MOD_DEC_USE_COUNT;
1061 #else
1062         module_put(THIS_MODULE);
1063 #endif
1064
1065         return rc;
1066 }
1067
1068 int mdc_set_info_async(struct obd_export *exp, obd_count keylen,
1069                        void *key, obd_count vallen, void *val,
1070                        struct ptlrpc_request_set *set)
1071 {
1072         struct obd_import *imp = class_exp2cliimp(exp);
1073         int rc = -EINVAL;
1074
1075         if (KEY_IS(KEY_INIT_RECOV)) {
1076                 if (vallen != sizeof(int))
1077                         RETURN(-EINVAL);
1078                 spin_lock(&imp->imp_lock);
1079                 imp->imp_initial_recov = *(int *)val;
1080                 spin_unlock(&imp->imp_lock);
1081                 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
1082                        exp->exp_obd->obd_name, imp->imp_initial_recov);
1083                 RETURN(0);
1084         }
1085         /* Turn off initial_recov after we try all backup servers once */
1086         if (KEY_IS(KEY_INIT_RECOV_BACKUP)) {
1087                 if (vallen != sizeof(int))
1088                         RETURN(-EINVAL);
1089                 spin_lock(&imp->imp_lock);
1090                 imp->imp_initial_recov_bk = *(int *)val;
1091                 if (imp->imp_initial_recov_bk)
1092                         imp->imp_initial_recov = 1;
1093                 spin_unlock(&imp->imp_lock);
1094                 CDEBUG(D_HA, "%s: set imp_initial_recov_bk = %d\n",
1095                        exp->exp_obd->obd_name, imp->imp_initial_recov_bk);
1096                 RETURN(0);
1097         }
1098         if (KEY_IS(KEY_READ_ONLY)) {
1099                 struct ptlrpc_request *req;
1100                 int size[3] = { sizeof(struct ptlrpc_body), keylen, vallen };
1101                 char *bufs[3] = { NULL, key, val };
1102
1103                 if (vallen != sizeof(int))
1104                         RETURN(-EINVAL);
1105
1106                 spin_lock(&imp->imp_lock);
1107                 if (*((int *)val)) {
1108                         imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
1109                         imp->imp_connect_data.ocd_connect_flags |=
1110                                 OBD_CONNECT_RDONLY;
1111                 } else {
1112                         imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
1113                         imp->imp_connect_data.ocd_connect_flags &=
1114                                 ~OBD_CONNECT_RDONLY;
1115                 }
1116                 spin_unlock(&imp->imp_lock);
1117
1118                 req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_SET_INFO,
1119                                       3, size, bufs);
1120                 if (req == NULL)
1121                         RETURN(-ENOMEM);
1122
1123                 ptlrpc_req_set_repsize(req, 1, NULL);
1124                 if (set) {
1125                         rc = 0;
1126                         ptlrpc_set_add_req(set, req);
1127                         ptlrpc_check_set(set);
1128                 } else {
1129                         rc = ptlrpc_queue_wait(req);
1130                         ptlrpc_req_finished(req);
1131                 }
1132
1133                 RETURN(rc);
1134         }
1135         if (KEY_IS(KEY_FLUSH_CTX)) {
1136                 sptlrpc_import_flush_my_ctx(imp);
1137                 RETURN(0);
1138         }
1139         if (KEY_IS(KEY_MDS_CONN)) {
1140                 struct obd_import *imp = class_exp2cliimp(exp);
1141
1142                 /* mds-mds import */
1143                 spin_lock(&imp->imp_lock);
1144                 imp->imp_server_timeout = 1;
1145                 spin_unlock(&imp->imp_lock);
1146                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1147                 CDEBUG(D_OTHER|D_WARNING, "%s: timeout / 2\n", exp->exp_obd->obd_name);
1148                 RETURN(0);
1149         }
1150
1151         RETURN(rc);
1152 }
1153
1154 int mdc_get_info(struct obd_export *exp, __u32 keylen, void *key,
1155                  __u32 *vallen, void *val)
1156 {
1157         int rc = -EINVAL;
1158
1159         if (KEY_IS(KEY_MAX_EASIZE)) {
1160                 int mdsize, *max_easize;
1161
1162                 if (*vallen != sizeof(int))
1163                         RETURN(-EINVAL);
1164                 mdsize = *(int*)val;
1165                 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
1166                         exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
1167                 max_easize = val;
1168                 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
1169                 RETURN(0);
1170         }
1171         if (KEY_IS(KEY_CONN_DATA)) {
1172                 struct obd_import *imp = class_exp2cliimp(exp);
1173                 struct obd_connect_data *data = val;
1174
1175                 if (*vallen != sizeof(*data))
1176                         RETURN(-EINVAL);
1177
1178                 *data = imp->imp_connect_data;
1179                 RETURN(0);
1180         }
1181
1182         RETURN(rc);
1183 }
1184
1185 static int mdc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1186                       __u64 max_age)
1187 {
1188         struct ptlrpc_request *req;
1189         struct obd_statfs *msfs;
1190         int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*msfs) };
1191         ENTRY;
1192
1193         /* We could possibly pass max_age in the request (as an absolute
1194          * timestamp or a "seconds.usec ago") so the target can avoid doing
1195          * extra calls into the filesystem if that isn't necessary (e.g.
1196          * during mount that would help a bit).  Having relative timestamps
1197          * is not so great if request processing is slow, while absolute
1198          * timestamps are not ideal because they need time synchronization. */
1199         req = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_MDS_VERSION,
1200                               MDS_STATFS, 1, NULL, NULL);
1201         if (!req)
1202                 RETURN(-ENOMEM);
1203
1204         ptlrpc_req_set_repsize(req, 2, size);
1205
1206         rc = ptlrpc_queue_wait(req);
1207
1208         if (rc) {
1209                 /* check connection error first */
1210                 if (obd->u.cli.cl_import->imp_connect_error)
1211                         rc = obd->u.cli.cl_import->imp_connect_error;
1212
1213                 GOTO(out, rc);
1214         }
1215
1216         msfs = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*msfs),
1217                                   lustre_swab_obd_statfs);
1218         if (msfs == NULL) {
1219                 CERROR("Can't unpack obd_statfs\n");
1220                 GOTO(out, rc = -EPROTO);
1221         }
1222
1223         memcpy(osfs, msfs, sizeof(*msfs));
1224         EXIT;
1225 out:
1226         ptlrpc_req_finished(req);
1227
1228         return rc;
1229 }
1230
1231 static int mdc_pin(struct obd_export *exp, const struct lu_fid *fid,
1232                    struct obd_capa *oc,
1233                    struct obd_client_handle *handle, int flag)
1234 {
1235         struct ptlrpc_request *req;
1236         struct mdt_body *body;
1237         int rc, size[3] = { sizeof(struct ptlrpc_body), sizeof(*body) };
1238         ENTRY;
1239
1240         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
1241         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1242                               MDS_PIN, 3, size, NULL);
1243         if (req == NULL)
1244                 RETURN(-ENOMEM);
1245
1246         body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof (*body));
1247         body->fid1 = *fid;
1248         body->flags = flag;
1249         mdc_pack_capa(req, REQ_REC_OFF + 1, oc);
1250
1251         ptlrpc_req_set_repsize(req, 2, size);
1252
1253         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1254         rc = ptlrpc_queue_wait(req);
1255         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1256         if (rc) {
1257                 CERROR("pin failed: %d\n", rc);
1258                 ptlrpc_req_finished(req);
1259                 RETURN(rc);
1260         }
1261
1262         body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1263                                   lustre_swab_mdt_body);
1264         if (body == NULL) {
1265                 ptlrpc_req_finished(req);
1266                 RETURN(rc);
1267         }
1268
1269         memcpy(&handle->och_fh, &body->handle, sizeof(body->handle));
1270         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
1271
1272         OBD_ALLOC(handle->och_mod, sizeof(*handle->och_mod));
1273         if (handle->och_mod == NULL) {
1274                 DEBUG_REQ(D_ERROR, req, "can't allocate mdc_open_data");
1275                 RETURN(-ENOMEM);
1276         }
1277         handle->och_mod->mod_open_req = req; /* will be dropped by unpin */
1278
1279         RETURN(rc);
1280 }
1281
1282 static int mdc_unpin(struct obd_export *exp,
1283                      struct obd_client_handle *handle, int flag)
1284 {
1285         struct ptlrpc_request *req;
1286         struct mdt_body *body;
1287         int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
1288         ENTRY;
1289
1290         if (handle->och_magic != OBD_CLIENT_HANDLE_MAGIC)
1291                 RETURN(0);
1292
1293         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1294                               MDS_CLOSE, 2, size, NULL);
1295         if (req == NULL)
1296                 RETURN(-ENOMEM);
1297
1298         body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
1299         memcpy(&body->handle, &handle->och_fh, sizeof(body->handle));
1300         body->flags = flag;
1301
1302         ptlrpc_req_set_repsize(req, 1, NULL);
1303         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1304         rc = ptlrpc_queue_wait(req);
1305         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1306
1307         if (rc != 0)
1308                 CERROR("unpin failed: %d\n", rc);
1309
1310         ptlrpc_req_finished(req);
1311         ptlrpc_req_finished(handle->och_mod->mod_open_req);
1312         OBD_FREE(handle->och_mod, sizeof(*handle->och_mod));
1313         RETURN(rc);
1314 }
1315
1316 int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
1317              struct obd_capa *oc, struct ptlrpc_request **request)
1318 {
1319         struct ptlrpc_request *req;
1320         int size[3] = { sizeof(struct ptlrpc_body), sizeof(struct mdt_body) };
1321         int rc;
1322         ENTRY;
1323
1324         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
1325         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1326                               MDS_SYNC, 3, size, NULL);
1327         if (!req)
1328                 RETURN(rc = -ENOMEM);
1329
1330         mdc_pack_req_body(req, REQ_REC_OFF, 0, fid, oc, 0, 0);
1331
1332         ptlrpc_req_set_repsize(req, 2, size);
1333
1334         rc = ptlrpc_queue_wait(req);
1335         if (rc || request == NULL)
1336                 ptlrpc_req_finished(req);
1337         else
1338                 *request = req;
1339
1340         RETURN(rc);
1341 }
1342
1343 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
1344                             enum obd_import_event event)
1345 {
1346         int rc = 0;
1347
1348         LASSERT(imp->imp_obd == obd);
1349
1350         switch (event) {
1351         case IMP_EVENT_DISCON: {
1352 #if 0
1353                 /* XXX Pass event up to OBDs stack. used only for FLD now */
1354                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
1355 #endif
1356                 break;
1357         }
1358         case IMP_EVENT_INACTIVE: {
1359                 struct client_obd *cli = &obd->u.cli;
1360                 /*
1361                  * Flush current sequence to make client obtain new one
1362                  * from server in case of disconnect/reconnect.
1363                  * If range is already empty then no need to flush it.
1364                  */
1365                 if (cli->cl_seq != NULL &&
1366                     !range_is_exhausted(&cli->cl_seq->lcs_space)) {
1367                         seq_client_flush(cli->cl_seq);
1368                 }
1369
1370                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
1371                 break;
1372         }
1373         case IMP_EVENT_INVALIDATE: {
1374                 struct ldlm_namespace *ns = obd->obd_namespace;
1375
1376                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
1377
1378                 break;
1379         }
1380         case IMP_EVENT_ACTIVE: {
1381                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
1382                 break;
1383         }
1384         case IMP_EVENT_OCD:
1385                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
1386                 break;
1387
1388         default:
1389                 CERROR("Unknown import event %x\n", event);
1390                 LBUG();
1391         }
1392         RETURN(rc);
1393 }
1394
1395 static int mdc_fid_init(struct obd_export *exp)
1396 {
1397         struct client_obd *cli = &exp->exp_obd->u.cli;
1398         char *prefix;
1399         int rc;
1400         ENTRY;
1401
1402         OBD_ALLOC_PTR(cli->cl_seq);
1403         if (cli->cl_seq == NULL)
1404                 RETURN(-ENOMEM);
1405
1406         OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
1407         if (prefix == NULL)
1408                 GOTO(out_free_seq, rc = -ENOMEM);
1409
1410         snprintf(prefix, MAX_OBD_NAME + 5, "srv-%s",
1411                  exp->exp_obd->obd_name);
1412
1413         /* Init client side sequence-manager */
1414         rc = seq_client_init(cli->cl_seq, exp,
1415                              LUSTRE_SEQ_METADATA,
1416                              prefix, NULL);
1417         OBD_FREE(prefix, MAX_OBD_NAME + 5);
1418         if (rc)
1419                 GOTO(out_free_seq, rc);
1420
1421         RETURN(rc);
1422 out_free_seq:
1423         OBD_FREE_PTR(cli->cl_seq);
1424         cli->cl_seq = NULL;
1425         return rc;
1426 }
1427
1428 static int mdc_fid_fini(struct obd_export *exp)
1429 {
1430         struct client_obd *cli = &exp->exp_obd->u.cli;
1431         ENTRY;
1432
1433         if (cli->cl_seq != NULL) {
1434                 seq_client_fini(cli->cl_seq);
1435                 OBD_FREE_PTR(cli->cl_seq);
1436                 cli->cl_seq = NULL;
1437         }
1438
1439         RETURN(0);
1440 }
1441
1442 int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1443                   struct md_op_data *op_data)
1444 {
1445         struct client_obd *cli = &exp->exp_obd->u.cli;
1446         struct lu_client_seq *seq = cli->cl_seq;
1447         ENTRY;
1448         RETURN(seq_client_alloc_fid(seq, fid));
1449 }
1450
1451 /* XXX This method is used only to clear current fid seq
1452  * once fld/mds insert failed */
1453 static int mdc_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
1454 {
1455         struct client_obd *cli = &exp->exp_obd->u.cli;
1456
1457         seq_client_flush(cli->cl_seq);
1458         return 0;
1459 }
1460
1461 static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
1462 {
1463         struct client_obd *cli = &obd->u.cli;
1464         struct lprocfs_static_vars lvars;
1465         int rc;
1466         ENTRY;
1467
1468         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1469         if (!cli->cl_rpc_lock)
1470                 RETURN(-ENOMEM);
1471         mdc_init_rpc_lock(cli->cl_rpc_lock);
1472
1473         ptlrpcd_addref();
1474
1475         OBD_ALLOC(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1476         if (!cli->cl_setattr_lock)
1477                 GOTO(err_rpc_lock, rc = -ENOMEM);
1478         mdc_init_rpc_lock(cli->cl_setattr_lock);
1479
1480         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1481         if (!cli->cl_close_lock)
1482                 GOTO(err_setattr_lock, rc = -ENOMEM);
1483         mdc_init_rpc_lock(cli->cl_close_lock);
1484
1485         rc = client_obd_setup(obd, cfg);
1486         if (rc)
1487                 GOTO(err_close_lock, rc);
1488         lprocfs_init_vars(mdc, &lvars);
1489         lprocfs_obd_setup(obd, lvars.obd_vars);
1490         ptlrpc_lprocfs_register_obd(obd);
1491
1492         rc = obd_llog_init(obd, NULL, obd, 0, NULL, NULL);
1493         if (rc) {
1494                 mdc_cleanup(obd);
1495                 CERROR("failed to setup llogging subsystems\n");
1496         }
1497
1498         RETURN(rc);
1499
1500 err_close_lock:
1501         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1502 err_setattr_lock:
1503         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1504 err_rpc_lock:
1505         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1506         ptlrpcd_decref();
1507         RETURN(rc);
1508 }
1509
1510 /* Initialize the default and maximum LOV EA and cookie sizes.  This allows
1511  * us to make MDS RPCs with large enough reply buffers to hold the
1512  * maximum-sized (= maximum striped) EA and cookie without having to
1513  * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
1514 int mdc_init_ea_size(struct obd_export *exp, int easize,
1515                      int def_easize, int cookiesize)
1516 {
1517         struct obd_device *obd = exp->exp_obd;
1518         struct client_obd *cli = &obd->u.cli;
1519         ENTRY;
1520
1521         if (cli->cl_max_mds_easize < easize)
1522                 cli->cl_max_mds_easize = easize;
1523
1524         if (cli->cl_default_mds_easize < def_easize)
1525                 cli->cl_default_mds_easize = def_easize;
1526
1527         if (cli->cl_max_mds_cookiesize < cookiesize)
1528                 cli->cl_max_mds_cookiesize = cookiesize;
1529
1530         RETURN(0);
1531 }
1532
1533 static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
1534 {
1535         int rc = 0;
1536         ENTRY;
1537
1538         switch (stage) {
1539         case OBD_CLEANUP_EARLY:
1540         case OBD_CLEANUP_EXPORTS:
1541                 /* If we set up but never connected, the
1542                    client import will not have been cleaned. */
1543                 if (obd->u.cli.cl_import) {
1544                         struct obd_import *imp;
1545                         imp = obd->u.cli.cl_import;
1546                         CERROR("client import never connected\n");
1547                         ptlrpc_invalidate_import(imp);
1548                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
1549                         class_destroy_import(imp);
1550                         obd->u.cli.cl_import = NULL;
1551                 }
1552                 break;
1553         case OBD_CLEANUP_SELF_EXP:
1554                 rc = obd_llog_finish(obd, 0);
1555                 if (rc != 0)
1556                         CERROR("failed to cleanup llogging subsystems\n");
1557         case OBD_CLEANUP_OBD:
1558                 break;
1559         }
1560         RETURN(rc);
1561 }
1562
1563 static int mdc_cleanup(struct obd_device *obd)
1564 {
1565         struct client_obd *cli = &obd->u.cli;
1566
1567         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1568         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1569         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1570
1571         ptlrpc_lprocfs_unregister_obd(obd);
1572         lprocfs_obd_cleanup(obd);
1573         ptlrpcd_decref();
1574
1575         return client_obd_cleanup(obd);
1576 }
1577
1578
1579 static int mdc_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
1580                          struct obd_device *tgt,
1581                          int count, struct llog_catid *logid,
1582                          struct obd_uuid *uuid)
1583 {
1584         struct llog_ctxt *ctxt;
1585         int rc;
1586         ENTRY;
1587
1588         rc = llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
1589                         &llog_client_ops);
1590         if (rc == 0) {
1591                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1592                 ctxt->loc_imp = obd->u.cli.cl_import;
1593         }
1594
1595         rc = llog_setup(obd, llogs, LLOG_LOVEA_REPL_CTXT, tgt, 0, NULL,
1596                        &llog_client_ops);
1597         if (rc == 0) {
1598                 ctxt = llog_get_context(obd, LLOG_LOVEA_REPL_CTXT);
1599                 ctxt->loc_imp = obd->u.cli.cl_import;
1600         }
1601
1602         RETURN(rc);
1603 }
1604
1605 static int mdc_llog_finish(struct obd_device *obd, int count)
1606 {
1607         int rc;
1608         ENTRY;
1609
1610         rc = llog_cleanup(llog_get_context(obd, LLOG_LOVEA_REPL_CTXT));
1611         if (rc) {
1612                 CERROR("can not cleanup LLOG_CONFIG_REPL_CTXT rc %d\n", rc);
1613         }
1614         rc = llog_cleanup(llog_get_context(obd, LLOG_CONFIG_REPL_CTXT));
1615         RETURN(rc);
1616 }
1617
1618 static int mdc_process_config(struct obd_device *obd, obd_count len, void *buf)
1619 {
1620         struct lustre_cfg *lcfg = buf;
1621         struct lprocfs_static_vars lvars;
1622         int rc = 0;
1623
1624         lprocfs_init_vars(mdc, &lvars);
1625
1626         rc = class_process_proc_param(PARAM_MDC, lvars.obd_vars, lcfg, obd);
1627         return(rc);
1628 }
1629
1630 /* get remote permission for current user on fid */
1631 int mdc_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
1632                         struct obd_capa *oc, struct ptlrpc_request **request)
1633 {
1634         struct ptlrpc_request *req;
1635         struct mdt_body *body;
1636         struct mdt_remote_perm *perm;
1637         int size[5] = { sizeof(struct ptlrpc_body), sizeof(*body) };
1638         int rc;
1639         ENTRY;
1640
1641         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
1642
1643         *request = NULL;
1644         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1645                               MDS_GETATTR, 3, size, NULL);
1646         if (!req)
1647                 RETURN(-ENOMEM);
1648
1649         mdc_pack_req_body(req, REQ_REC_OFF, OBD_MD_FLRMTPERM, fid, oc, 0, 0);
1650
1651         size[REPLY_REC_OFF + 1] = sizeof(*perm);
1652         ptlrpc_req_set_repsize(req, 5, size);
1653         rc = ptlrpc_queue_wait(req);
1654         if (rc) {
1655                 ptlrpc_req_finished(req);
1656                 RETURN(rc);
1657         }
1658
1659         body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1660                                   lustre_swab_mdt_body);
1661         LASSERT(body);
1662         LASSERT(body->valid & OBD_MD_FLRMTPERM);
1663
1664         perm = lustre_swab_repbuf(req, REPLY_REC_OFF + 1, sizeof(*perm),
1665                                   lustre_swab_mdt_remote_perm);
1666         LASSERT(perm);
1667
1668         *request = req;
1669         RETURN(0);
1670 }
1671
1672 static int mdc_interpret_renew_capa(struct ptlrpc_request *req, void *unused,
1673                                     int status)
1674 {
1675         struct obd_capa *oc = req->rq_async_args.pointer_arg[0];
1676         renew_capa_cb_t cb = req->rq_async_args.pointer_arg[1];
1677         struct mdt_body *body = NULL;
1678         struct lustre_capa *capa;
1679         ENTRY;
1680
1681         if (status)
1682                 GOTO(out, capa = ERR_PTR(status));
1683
1684         body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1685                                   lustre_swab_mdt_body);
1686         if (body == NULL)
1687                 GOTO(out, capa = ERR_PTR(-EFAULT));
1688
1689         if ((body->valid & OBD_MD_FLOSSCAPA) == 0)
1690                 GOTO(out, capa = ERR_PTR(-ENOENT));
1691
1692         capa = lustre_unpack_capa(req->rq_repmsg, REPLY_REC_OFF + 1);
1693         if (!capa)
1694                 GOTO(out, capa = ERR_PTR(-EFAULT));
1695         EXIT;
1696 out:
1697         cb(oc, capa);
1698         return 0;
1699 }
1700
1701 static int mdc_renew_capa(struct obd_export *exp, struct obd_capa *oc,
1702                           renew_capa_cb_t cb)
1703 {
1704         struct ptlrpc_request *req;
1705         int size[5] = { sizeof(struct ptlrpc_body),
1706                         sizeof(struct mdt_body),
1707                         sizeof(struct lustre_capa) };
1708         ENTRY;
1709
1710         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1711                               MDS_GETATTR, 3, size, NULL);
1712         if (!req)
1713                 RETURN(-ENOMEM);
1714
1715         mdc_pack_req_body(req, REQ_REC_OFF, OBD_MD_FLOSSCAPA,
1716                           &oc->c_capa.lc_fid, oc, 0, 0);
1717
1718         ptlrpc_req_set_repsize(req, 5, size);
1719         req->rq_async_args.pointer_arg[0] = oc;
1720         req->rq_async_args.pointer_arg[1] = cb;
1721         req->rq_interpret_reply = mdc_interpret_renew_capa;
1722         ptlrpcd_add_req(req);
1723
1724         RETURN(0);
1725 }
1726
1727 static int mdc_connect(const struct lu_env *env,
1728                        struct lustre_handle *dlm_handle,
1729                        struct obd_device *obd, struct obd_uuid *cluuid,
1730                        struct obd_connect_data *data) {
1731         struct obd_import *imp = obd->u.cli.cl_import;
1732
1733         /* mds-mds import features */
1734         if (data && (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS)) {
1735                 spin_lock(&imp->imp_lock);
1736                 imp->imp_server_timeout = 1;
1737                 spin_unlock(&imp->imp_lock);
1738                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1739                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
1740                        obd->obd_name);
1741         }
1742
1743         return client_connect_import(env, dlm_handle, obd, cluuid, data);
1744 }
1745
1746 struct obd_ops mdc_obd_ops = {
1747         .o_owner            = THIS_MODULE,
1748         .o_setup            = mdc_setup,
1749         .o_precleanup       = mdc_precleanup,
1750         .o_cleanup          = mdc_cleanup,
1751         .o_add_conn         = client_import_add_conn,
1752         .o_del_conn         = client_import_del_conn,
1753         .o_connect          = mdc_connect,
1754         .o_disconnect       = client_disconnect_export,
1755         .o_iocontrol        = mdc_iocontrol,
1756         .o_set_info_async   = mdc_set_info_async,
1757         .o_statfs           = mdc_statfs,
1758         .o_pin              = mdc_pin,
1759         .o_unpin            = mdc_unpin,
1760         .o_fid_init         = mdc_fid_init,
1761         .o_fid_fini         = mdc_fid_fini,
1762         .o_fid_alloc        = mdc_fid_alloc,
1763         .o_fid_delete       = mdc_fid_delete,
1764         .o_import_event     = mdc_import_event,
1765         .o_llog_init        = mdc_llog_init,
1766         .o_llog_finish      = mdc_llog_finish,
1767         .o_get_info         = mdc_get_info,
1768         .o_process_config  = mdc_process_config,
1769 };
1770
1771 struct md_ops mdc_md_ops = {
1772         .m_getstatus        = mdc_getstatus,
1773         .m_change_cbdata    = mdc_change_cbdata,
1774         .m_close            = mdc_close,
1775         .m_create           = mdc_create,
1776         .m_done_writing     = mdc_done_writing,
1777         .m_enqueue          = mdc_enqueue,
1778         .m_getattr          = mdc_getattr,
1779         .m_getattr_name     = mdc_getattr_name,
1780         .m_intent_lock      = mdc_intent_lock,
1781         .m_link             = mdc_link,
1782         .m_is_subdir        = mdc_is_subdir,
1783         .m_rename           = mdc_rename,
1784         .m_setattr          = mdc_setattr,
1785         .m_setxattr         = mdc_setxattr,
1786         .m_getxattr         = mdc_getxattr,
1787         .m_sync             = mdc_sync,
1788         .m_readpage         = mdc_readpage,
1789         .m_unlink           = mdc_unlink,
1790         .m_cancel_unused    = mdc_cancel_unused,
1791         .m_init_ea_size     = mdc_init_ea_size,
1792         .m_set_lock_data    = mdc_set_lock_data,
1793         .m_lock_match       = mdc_lock_match,
1794         .m_get_lustre_md    = mdc_get_lustre_md,
1795         .m_free_lustre_md   = mdc_free_lustre_md,
1796         .m_set_open_replay_data = mdc_set_open_replay_data,
1797         .m_clear_open_replay_data = mdc_clear_open_replay_data,
1798         .m_get_remote_perm  = mdc_get_remote_perm,
1799         .m_renew_capa       = mdc_renew_capa
1800 };
1801
1802 extern quota_interface_t mdc_quota_interface;
1803
1804 int __init mdc_init(void)
1805 {
1806         int rc;
1807         struct lprocfs_static_vars lvars;
1808         lprocfs_init_vars(mdc, &lvars);
1809
1810         request_module("lquota");
1811         quota_interface = PORTAL_SYMBOL_GET(mdc_quota_interface);
1812         init_obd_quota_ops(quota_interface, &mdc_obd_ops);
1813
1814         rc = class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
1815                                  LUSTRE_MDC_NAME, NULL);
1816         if (rc && quota_interface)
1817                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1818
1819         RETURN(rc);
1820 }
1821
1822 #ifdef __KERNEL__
1823 static void /*__exit*/ mdc_exit(void)
1824 {
1825         if (quota_interface)
1826                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1827
1828         class_unregister_type(LUSTRE_MDC_NAME);
1829 }
1830
1831 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1832 MODULE_DESCRIPTION("Lustre Metadata Client");
1833 MODULE_LICENSE("GPL");
1834
1835 module_init(mdc_init);
1836 module_exit(mdc_exit);
1837 #endif