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                                         const struct req_msg_field *field)
  59 {
  60         struct lustre_capa *capa;
  61         struct obd_capa *oc;
  62
  63         /* swabbed already in mdc_enqueue */
  64         capa = req_capsule_server_get(&req->rq_pill, field);
  65         if (capa == NULL)
  66                 return ERR_PTR(-EPROTO);
  67
  68         oc = alloc_capa(CAPA_SITE_CLIENT);
  69         if (!oc) {
  70                 CDEBUG(D_INFO, "alloc capa failed!\n");
  71                 return ERR_PTR(-ENOMEM);
  72         }
  73         oc->c_capa = *capa;
  74
  75         return oc;
  76 }
  77
  78 /* Helper that implements most of mdc_getstatus and signal_completed_replay. */
  79 /* XXX this should become mdc_get_info("key"), sending MDS_GET_INFO RPC */
  80 static int send_getstatus(struct obd_import *imp, struct lu_fid *rootfid,
  81                           struct obd_capa **pc, int level, int msg_flags)
  82 {
  83         struct ptlrpc_request *req;
  84         struct mdt_body       *body;
  85         int                    rc;
  86         ENTRY;
  87
  88         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_GETSTATUS,
  89                                         LUSTRE_MDS_VERSION, MDS_GETSTATUS);
  90         if (req == NULL)
  91                 RETURN(-ENOMEM);
  92
  93         mdc_pack_body(req, NULL, NULL, 0, 0, -1, 0);
  94         lustre_msg_add_flags(req->rq_reqmsg, msg_flags);
  95         req->rq_send_state = level;
  96
  97         ptlrpc_request_set_replen(req);
  98
  99         rc = ptlrpc_queue_wait(req);
 100         if (rc)
 101                 GOTO(out, rc);
 102
 103         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 104         if (body == NULL)
 105                 GOTO(out, rc = -EPROTO);
 106
 107         if (body->valid & OBD_MD_FLMDSCAPA) {
 108                 struct obd_capa *oc;
 109
 110                 oc = mdc_unpack_capa(req, &RMF_CAPA1);
 111                 if (IS_ERR(oc))
 112                         GOTO(out, rc = PTR_ERR(oc));
 113                 *pc = oc;
 114         }
 115
 116         *rootfid = body->fid1;
 117         CDEBUG(D_NET,
 118                "root fid="DFID", last_committed="LPU64", last_xid="LPU64"\n",
 119                PFID(rootfid),
 120                lustre_msg_get_last_committed(req->rq_repmsg),
 121                lustre_msg_get_last_xid(req->rq_repmsg));
 122         EXIT;
 123 out:
 124         ptlrpc_req_finished(req);
 125         return rc;
 126 }
 127
 128 /* This should be mdc_get_info("rootfid") */
 129 int mdc_getstatus(struct obd_export *exp, struct lu_fid *rootfid,
 130                   struct obd_capa **pc)
 131 {
 132         return send_getstatus(class_exp2cliimp(exp), rootfid, pc,
 133                               LUSTRE_IMP_FULL, 0);
 134 }
 135
 136 /*
 137  * This function now is known to always saying that it will receive 4 buffers
 138  * from server. Even for cases when acl_size and md_size is zero, RPC header
 139  * willcontain 4 fields and RPC itself will contain zero size fields. This is
 140  * because mdt_getattr*() _always_ returns 4 fields, but if acl is not needed
 141  * and thus zero, it shirinks it, making zero size. The same story about
 142  * md_size. And this is course of problem when client waits for smaller number
 143  * of fields. This issue will be fixed later when client gets awar of RPC
 144  * layouts.  --umka
 145  */
 146 static int mdc_getattr_common(struct obd_export *exp,
 147                               struct ptlrpc_request *req)
 148 {
 149         struct req_capsule *pill = &req->rq_pill;
 150         struct mdt_body    *body;
 151         void               *eadata;
 152         int                 rc;
 153         ENTRY;
 154
 155         /* Request message already built. */
 156         rc = ptlrpc_queue_wait(req);
 157         if (rc != 0)
 158                 RETURN(rc);
 159
 160         /* sanity check for the reply */
 161         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 162         if (body == NULL)
 163                 RETURN(-EPROTO);
 164
 165         CDEBUG(D_NET, "mode: %o\n", body->mode);
 166
 167         if (body->eadatasize != 0) {
 168                 eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 169                                                       body->eadatasize);
 170                 if (eadata == NULL)
 171                         RETURN(-EPROTO);
 172         }
 173
 174         if (body->valid & OBD_MD_FLMODEASIZE) {
 175                 struct client_obd *cli = &exp->exp_obd->u.cli;
 176
 177                 if (cli->cl_max_mds_easize < body->max_mdsize)
 178                         cli->cl_max_mds_easize = body->max_mdsize;
 179                 if (cli->cl_max_mds_cookiesize < body->max_cookiesize)
 180                         cli->cl_max_mds_cookiesize = body->max_cookiesize;
 181         }
 182
 183         if (body->valid & OBD_MD_FLRMTPERM) {
 184                 struct mdt_remote_perm *perm;
 185
 186                 LASSERT(client_is_remote(exp));
 187                 perm = req_capsule_server_swab_get(pill, &RMF_ACL,
 188                                                 lustre_swab_mdt_remote_perm);
 189                 if (perm == NULL)
 190                         RETURN(-EPROTO);
 191         }
 192
 193         if (body->valid & OBD_MD_FLMDSCAPA) {
 194                 struct lustre_capa *capa;
 195                 capa = req_capsule_server_get(pill, &RMF_CAPA1);
 196                 if (capa == NULL)
 197                         RETURN(-EPROTO);
 198         }
 199
 200         RETURN(0);
 201 }
 202
 203 int mdc_getattr(struct obd_export *exp, const struct lu_fid *fid,
 204                 struct obd_capa *oc, obd_valid valid, int ea_size,
 205                 struct ptlrpc_request **request)
 206 {
 207         struct ptlrpc_request *req;
 208         int                    rc;
 209         ENTRY;
 210
 211         *request = NULL;
 212         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
 213         if (req == NULL)
 214                 RETURN(-ENOMEM);
 215
 216         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 217
 218         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
 219         if (rc) {
 220                 ptlrpc_request_free(req);
 221                 RETURN(rc);
 222         }
 223
 224         /* MDS_BFLAG_EXT_FLAGS: request "new" flags(bug 9486) */
 225         mdc_pack_body(req, fid, oc, valid, ea_size, -1, MDS_BFLAG_EXT_FLAGS);
 226
 227         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, ea_size);
 228         if (valid & OBD_MD_FLRMTPERM) {
 229                 LASSERT(client_is_remote(exp));
 230                 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
 231                                      sizeof(struct mdt_remote_perm));
 232         }
 233         ptlrpc_request_set_replen(req);
 234
 235         rc = mdc_getattr_common(exp, req);
 236         if (rc)
 237                 ptlrpc_req_finished(req);
 238         else
 239                 *request = req;
 240         RETURN(rc);
 241 }
 242
 243 int mdc_getattr_name(struct obd_export *exp, const struct lu_fid *fid,
 244                      struct obd_capa *oc, const char *filename, int namelen,
 245                      obd_valid valid, int ea_size, __u32 suppgid,
 246                      struct ptlrpc_request **request)
 247 {
 248         struct ptlrpc_request *req;
 249         int                    rc;
 250         ENTRY;
 251
 252         *request = NULL;
 253         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 254                                    &RQF_MDS_GETATTR_NAME);
 255         if (req == NULL)
 256                 RETURN(-ENOMEM);
 257
 258         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 259         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT, namelen);
 260
 261         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR_NAME);
 262         if (rc) {
 263                 ptlrpc_request_free(req);
 264                 RETURN(rc);
 265         }
 266
 267         /* MDS_BFLAG_EXT_FLAGS: request "new" flags(bug 9486) */
 268         mdc_pack_body(req, fid, oc, valid, ea_size, suppgid,
 269                       MDS_BFLAG_EXT_FLAGS);
 270
 271         if (filename) {
 272                 char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 273                 LASSERT(strnlen(filename, namelen) == namelen - 1);
 274                 memcpy(name, filename, namelen);
 275         }
 276
 277         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, ea_size);
 278         ptlrpc_request_set_replen(req);
 279
 280         rc = mdc_getattr_common(exp, req);
 281         if (rc)
 282                 ptlrpc_req_finished(req);
 283         else
 284                 *request = req;
 285         RETURN(rc);
 286 }
 287
 288 static int mdc_is_subdir(struct obd_export *exp,
 289                          const struct lu_fid *pfid,
 290                          const struct lu_fid *cfid,
 291                          struct ptlrpc_request **request)
 292 {
 293         struct ptlrpc_request  *req;
 294         int                     rc;
 295
 296         ENTRY;
 297
 298         *request = NULL;
 299         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 300                                         &RQF_MDS_IS_SUBDIR, LUSTRE_MDS_VERSION,
 301                                         MDS_IS_SUBDIR);
 302         if (req == NULL)
 303                 RETURN(-ENOMEM);
 304
 305         mdc_is_subdir_pack(req, pfid, cfid, 0);
 306         ptlrpc_request_set_replen(req);
 307
 308         rc = ptlrpc_queue_wait(req);
 309         if (rc && rc != -EREMOTE)
 310                 ptlrpc_req_finished(req);
 311         else
 312                 *request = req;
 313         RETURN(rc);
 314 }
 315
 316 static int mdc_xattr_common(struct obd_export *exp,const struct req_format *fmt,
 317                             const struct lu_fid *fid,
 318                             struct obd_capa *oc, int opcode, obd_valid valid,
 319                             const char *xattr_name, const char *input,
 320                             int input_size, int output_size, int flags,
 321                             __u32 suppgid, struct ptlrpc_request **request)
 322 {
 323         struct ptlrpc_request *req;
 324         int   xattr_namelen = 0;
 325         char *tmp;
 326         int   rc;
 327         ENTRY;
 328
 329         *request = NULL;
 330         req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
 331         if (req == NULL)
 332                 RETURN(-ENOMEM);
 333
 334         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 335         if (xattr_name) {
 336                 xattr_namelen = strlen(xattr_name) + 1;
 337                 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
 338                                      xattr_namelen);
 339         }
 340         if (input_size) {
 341                 LASSERT(input);
 342                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
 343                                      input_size);
 344         }
 345
 346         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, opcode);
 347         if (rc) {
 348                 ptlrpc_request_free(req);
 349                 RETURN(rc);
 350         }
 351
 352         if (opcode == MDS_REINT) {
 353                 struct mdt_rec_setxattr *rec;
 354
 355                 CLASSERT(sizeof(struct mdt_rec_setxattr) ==
 356                          sizeof(struct mdt_rec_reint));
 357                 rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 358                 rec->sx_opcode = REINT_SETXATTR;
 359                 /* TODO:
 360                  *  cfs_curproc_fs{u,g}id() should replace
 361                  *  current->fs{u,g}id for portability.
 362                  */
 363                 rec->sx_fsuid  = current->fsuid;
 364                 rec->sx_fsgid  = current->fsgid;
 365                 rec->sx_cap    = current->cap_effective;
 366                 rec->sx_suppgid1 = suppgid;
 367                 rec->sx_suppgid1 = -1;
 368                 rec->sx_fid    = *fid;
 369                 rec->sx_valid  = valid;
 370                 rec->sx_size   = output_size;
 371                 rec->sx_flags  = flags;
 372
 373                 mdc_pack_capa(req, &RMF_CAPA1, oc);
 374         } else {
 375                 mdc_pack_body(req, fid, oc, valid, output_size, suppgid, flags);
 376         }
 377
 378         if (xattr_name) {
 379                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 380                 memcpy(tmp, xattr_name, xattr_namelen);
 381         }
 382         if (input_size) {
 383                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
 384                 memcpy(tmp, input, input_size);
 385         }
 386
 387         if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
 388                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
 389                                      RCL_SERVER, output_size);
 390         ptlrpc_request_set_replen(req);
 391
 392         /* make rpc */
 393         if (opcode == MDS_REINT)
 394                 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 395
 396         rc = ptlrpc_queue_wait(req);
 397
 398         if (opcode == MDS_REINT)
 399                 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 400
 401         if (rc)
 402                 ptlrpc_req_finished(req);
 403         else
 404                 *request = req;
 405         RETURN(rc);
 406 }
 407
 408 int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
 409                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 410                  const char *input, int input_size, int output_size,
 411                  int flags, __u32 suppgid, struct ptlrpc_request **request)
 412 {
 413         return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
 414                                 fid, oc, MDS_REINT, valid, xattr_name,
 415                                 input, input_size, output_size, flags,
 416                                 suppgid, request);
 417 }
 418
 419 int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
 420                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 421                  const char *input, int input_size, int output_size,
 422                  int flags, struct ptlrpc_request **request)
 423 {
 424         return mdc_xattr_common(exp, &RQF_MDS_GETXATTR,
 425                                 fid, oc, MDS_GETXATTR, valid, xattr_name,
 426                                 input, input_size, output_size, flags,
 427                                 -1, request);
 428 }
 429
 430 #ifdef CONFIG_FS_POSIX_ACL
 431 static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
 432 {
 433         struct req_capsule     *pill = &req->rq_pill;
 434         struct mdt_body        *body = md->body;
 435         struct posix_acl       *acl;
 436         void                   *buf;
 437         int                     rc;
 438         ENTRY;
 439
 440         if (!body->aclsize)
 441                 RETURN(0);
 442
 443         buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->aclsize);
 444
 445         if (!buf)
 446                 RETURN(-EPROTO);
 447
 448         acl = posix_acl_from_xattr(buf, body->aclsize);
 449         if (IS_ERR(acl)) {
 450                 rc = PTR_ERR(acl);
 451                 CERROR("convert xattr to acl: %d\n", rc);
 452                 RETURN(rc);
 453         }
 454
 455         rc = posix_acl_valid(acl);
 456         if (rc) {
 457                 CERROR("validate acl: %d\n", rc);
 458                 posix_acl_release(acl);
 459                 RETURN(rc);
 460         }
 461
 462         md->posix_acl = acl;
 463         RETURN(0);
 464 }
 465 #else
 466 #define mdc_unpack_acl(req, md) 0
 467 #endif
 468
 469 int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
 470                       struct obd_export *dt_exp, struct obd_export *md_exp,
 471                       struct lustre_md *md)
 472 {
 473         struct req_capsule *pill = &req->rq_pill;
 474         int rc;
 475         ENTRY;
 476
 477         LASSERT(md);
 478         memset(md, 0, sizeof(*md));
 479
 480         md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 481         LASSERT(md->body != NULL);
 482
 483         if (md->body->valid & OBD_MD_FLEASIZE) {
 484                 int lmmsize;
 485                 struct lov_mds_md *lmm;
 486
 487                 if (!S_ISREG(md->body->mode)) {
 488                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, should be a "
 489                                "regular file, but is not\n");
 490                         GOTO(out, rc = -EPROTO);
 491                 }
 492
 493                 if (md->body->eadatasize == 0) {
 494                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, "
 495                                "but eadatasize 0\n");
 496                         GOTO(out, rc = -EPROTO);
 497                 }
 498                 lmmsize = md->body->eadatasize;
 499                 lmm = req_capsule_server_sized_get(pill, &RMF_MDT_MD, lmmsize);
 500                 if (!lmm)
 501                         GOTO(out, rc = -EPROTO);
 502
 503                 rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize);
 504                 if (rc < 0)
 505                         GOTO(out, rc);
 506
 507                 if (rc < sizeof(*md->lsm)) {
 508                         CDEBUG(D_INFO, "lsm size too small: "
 509                                "rc < sizeof (*md->lsm) (%d < "LPSZ")\n",
 510                                rc, sizeof(*md->lsm));
 511                         GOTO(out, rc = -EPROTO);
 512                 }
 513
 514         } else if (md->body->valid & OBD_MD_FLDIREA) {
 515                 int lmvsize;
 516                 struct lov_mds_md *lmv;
 517
 518                 if(!S_ISDIR(md->body->mode)) {
 519                         CDEBUG(D_INFO, "OBD_MD_FLDIREA set, should be a "
 520                                "directory, but is not\n");
 521                         GOTO(out, rc = -EPROTO);
 522                 }
 523
 524                 if (md->body->eadatasize == 0) {
 525                         CDEBUG(D_INFO, "OBD_MD_FLDIREA is set, "
 526                                "but eadatasize 0\n");
 527                         RETURN(-EPROTO);
 528                 }
 529                 if (md->body->valid & OBD_MD_MEA) {
 530                         lmvsize = md->body->eadatasize;
 531                         lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 532                                                            lmvsize);
 533                         if (!lmv)
 534                                 GOTO(out, rc = -EPROTO);
 535
 536                         rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
 537                                           lmvsize);
 538                         if (rc < 0)
 539                                 GOTO(out, rc);
 540
 541                         if (rc < sizeof(*md->mea)) {
 542                                 CDEBUG(D_INFO, "size too small:  "
 543                                        "rc < sizeof(*md->mea) (%d < %d)\n",
 544                                         rc, sizeof(*md->mea));
 545                                 GOTO(out, rc = -EPROTO);
 546                         }
 547                 }
 548         }
 549         rc = 0;
 550
 551         if (md->body->valid & OBD_MD_FLRMTPERM) {
 552                 /* remote permission */
 553                 LASSERT(client_is_remote(exp));
 554                 md->remote_perm = req_capsule_server_swab_get(pill, &RMF_ACL,
 555                                                 lustre_swab_mdt_remote_perm);
 556                 if (!md->remote_perm)
 557                         GOTO(out, rc = -EPROTO);
 558         }
 559         else if (md->body->valid & OBD_MD_FLACL) {
 560                 /* for ACL, it's possible that FLACL is set but aclsize is zero.
 561                  * only when aclsize != 0 there's an actual segment for ACL
 562                  * in reply buffer.
 563                  */
 564                 if (md->body->aclsize) {
 565                         rc = mdc_unpack_acl(req, md);
 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         if (md->body->valid & OBD_MD_FLMDSCAPA) {
 575                 struct obd_capa *oc = mdc_unpack_capa(req, &RMF_CAPA1);
 576
 577                 if (IS_ERR(oc))
 578                         GOTO(out, rc = PTR_ERR(oc));
 579                 md->mds_capa = oc;
 580         }
 581
 582         if (md->body->valid & OBD_MD_FLOSSCAPA) {
 583                 struct obd_capa *oc = mdc_unpack_capa(req, &RMF_CAPA2);
 584
 585                 if (IS_ERR(oc))
 586                         GOTO(out, rc = PTR_ERR(oc));
 587                 md->oss_capa = oc;
 588         }
 589
 590         EXIT;
 591 out:
 592         if (rc) {
 593                 if (md->oss_capa)
 594                         free_capa(md->oss_capa);
 595                 if (md->mds_capa)
 596                         free_capa(md->mds_capa);
 597 #ifdef CONFIG_FS_POSIX_ACL
 598                 posix_acl_release(md->posix_acl);
 599 #endif
 600                 if (md->lsm)
 601                         obd_free_memmd(dt_exp, &md->lsm);
 602         }
 603         return rc;
 604 }
 605
 606 int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
 607 {
 608         ENTRY;
 609         RETURN(0);
 610 }
 611
 612 static void mdc_replay_open(struct ptlrpc_request *req)
 613 {
 614         struct md_open_data *mod = req->rq_cb_data;
 615         struct ptlrpc_request *cur, *tmp;
 616         struct obd_client_handle *och;
 617         struct lustre_handle old;
 618         struct mdt_body *body;
 619         ENTRY;
 620
 621         if (mod == NULL) {
 622                 DEBUG_REQ(D_ERROR, req,
 623                           "Can't properly replay without open data.");
 624                 EXIT;
 625                 return;
 626         }
 627
 628         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 629         LASSERT(body != NULL);
 630
 631         och = mod->mod_och;
 632         if (och != NULL) {
 633                 struct lustre_handle *file_fh;
 634
 635                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 636
 637                 file_fh = &och->och_fh;
 638                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 639                        file_fh->cookie, body->handle.cookie);
 640                 old = *file_fh;
 641                 *file_fh = body->handle;
 642         }
 643         list_for_each_entry_safe(cur, tmp, &mod->mod_replay_list, rq_mod_list) {
 644                 int opc = lustre_msg_get_opc(cur->rq_reqmsg);
 645                 struct mdt_epoch *epoch = NULL;
 646
 647                 if (opc == MDS_CLOSE || opc == MDS_DONE_WRITING) {
 648                         epoch = req_capsule_client_get(&cur->rq_pill,
 649                                                &RMF_MDT_EPOCH);
 650                         LASSERT(epoch);
 651                         DEBUG_REQ(D_HA, cur, "updating %s body with new fh",
 652                                   opc == MDS_CLOSE ? "CLOSE" : "DONE_WRITING");
 653                 } else if (opc == MDS_REINT) {
 654                         struct mdt_rec_setattr *rec;
 655
 656                         /* Check this is REINT_SETATTR. */
 657                         rec = req_capsule_client_get(&cur->rq_pill,
 658                                                &RMF_REC_REINT);
 659                         LASSERT(rec && rec->sa_opcode == REINT_SETATTR);
 660
 661                         epoch = req_capsule_client_get(&cur->rq_pill,
 662                                                &RMF_MDT_EPOCH);
 663                         LASSERT(epoch);
 664                         DEBUG_REQ(D_HA, cur, "updating REINT_SETATTR body "
 665                                   "with new fh");
 666                 }
 667                 if (epoch) {
 668                         if (och != NULL)
 669                                 LASSERT(!memcmp(&old, &epoch->handle,
 670                                                 sizeof(old)));
 671                         epoch->handle = body->handle;
 672                 }
 673         }
 674         EXIT;
 675 }
 676
 677 void mdc_commit_delayed(struct ptlrpc_request *req)
 678 {
 679         struct md_open_data *mod = req->rq_cb_data;
 680         struct ptlrpc_request *cur, *tmp;
 681
 682         DEBUG_REQ(D_HA, req, "req committed");
 683
 684         if (mod == NULL)
 685                 return;
 686
 687         req->rq_cb_data = NULL;
 688         req->rq_commit_cb = NULL;
 689         list_del_init(&req->rq_mod_list);
 690         if (req->rq_sequence) {
 691                 list_for_each_entry_safe(cur, tmp, &mod->mod_replay_list,
 692                                          rq_mod_list) {
 693                         LASSERT(cur != LP_POISON);
 694                         LASSERT(cur->rq_type != LI_POISON);
 695                         DEBUG_REQ(D_HA, cur, "req balanced");
 696                         LASSERT(cur->rq_transno != 0);
 697                         LASSERT(cur->rq_import == req->rq_import);
 698
 699                         /* We no longer want to preserve this for transno-
 700                          * unconditional replay. */
 701                         spin_lock(&cur->rq_lock);
 702                         cur->rq_replay = 0;
 703                         spin_unlock(&cur->rq_lock);
 704                 }
 705         }
 706
 707         if (list_empty(&mod->mod_replay_list)) {
 708                 if (mod->mod_och != NULL)
 709                         mod->mod_och->och_mod = NULL;
 710
 711                 OBD_FREE_PTR(mod);
 712         }
 713 }
 714
 715 int mdc_set_open_replay_data(struct obd_export *exp,
 716                              struct obd_client_handle *och,
 717                              struct ptlrpc_request *open_req)
 718 {
 719         struct md_open_data   *mod;
 720         struct mdt_rec_create *rec;
 721         struct mdt_body       *body;
 722         struct obd_import     *imp = open_req->rq_import;
 723         ENTRY;
 724
 725         if (!open_req->rq_replay)
 726                 RETURN(0);
 727
 728         rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
 729         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
 730         LASSERT(rec != NULL);
 731         /* Incoming message in my byte order (it's been swabbed). */
 732         /* Outgoing messages always in my byte order. */
 733         LASSERT(body != NULL);
 734
 735         /* Only if the import is replayable, we set replay_open data */
 736         if (och && imp->imp_replayable) {
 737                 OBD_ALLOC_PTR(mod);
 738                 if (mod == NULL) {
 739                         DEBUG_REQ(D_ERROR, open_req,
 740                                   "Can't allocate md_open_data");
 741                         RETURN(0);
 742                 }
 743                 CFS_INIT_LIST_HEAD(&mod->mod_replay_list);
 744
 745                 spin_lock(&open_req->rq_lock);
 746                 och->och_mod = mod;
 747                 mod->mod_och = och;
 748                 open_req->rq_cb_data = mod;
 749                 list_add_tail(&open_req->rq_mod_list, &mod->mod_replay_list);
 750                 open_req->rq_commit_cb = mdc_commit_delayed;
 751                 spin_unlock(&open_req->rq_lock);
 752         }
 753
 754         rec->cr_fid2 = body->fid1;
 755         rec->cr_ioepoch = body->ioepoch;
 756         rec->cr_old_handle.cookie = body->handle.cookie;
 757         open_req->rq_replay_cb = mdc_replay_open;
 758         if (!fid_is_sane(&body->fid1)) {
 759                 DEBUG_REQ(D_ERROR, open_req, "Saving replay request with "
 760                           "insane fid");
 761                 LBUG();
 762         }
 763
 764         DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
 765         RETURN(0);
 766 }
 767
 768 int mdc_clear_open_replay_data(struct obd_export *exp,
 769                                struct obd_client_handle *och)
 770 {
 771         struct md_open_data *mod = och->och_mod;
 772         ENTRY;
 773
 774         /*
 775          * Don't free the structure now (it happens in mdc_commit_delayed(),
 776          * after the last request is removed from its replay list),
 777          * but make sure that replay doesn't poke at the och, which is about to
 778          * be freed.
 779          */
 780         LASSERT(mod != LP_POISON);
 781         if (mod != NULL)
 782                 mod->mod_och = NULL;
 783
 784         och->och_mod = NULL;
 785         RETURN(0);
 786 }
 787
 788 int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 789               struct md_open_data *mod, struct ptlrpc_request **request)
 790 {
 791         struct obd_device     *obd = class_exp2obd(exp);
 792         struct ptlrpc_request *req;
 793         int                    rc;
 794         ENTRY;
 795
 796         *request = NULL;
 797         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_CLOSE);
 798         if (req == NULL)
 799                 RETURN(-ENOMEM);
 800
 801         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 802
 803         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
 804         if (rc) {
 805                 ptlrpc_request_free(req);
 806                 RETURN(rc);
 807         }
 808
 809         /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
 810          * portal whose threads are not taking any DLM locks and are therefore
 811          * always progressing */
 812         /* XXX FIXME bug 249 */
 813         req->rq_request_portal = MDS_READPAGE_PORTAL;
 814
 815         /* Ensure that this close's handle is fixed up during replay. */
 816         if (likely(mod != NULL))
 817                 list_add_tail(&req->rq_mod_list, &mod->mod_replay_list);
 818         else
 819                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 820
 821         mdc_close_pack(req, op_data);
 822
 823         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
 824                              obd->u.cli.cl_max_mds_easize);
 825         req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
 826                              obd->u.cli.cl_max_mds_cookiesize);
 827
 828         ptlrpc_request_set_replen(req);
 829
 830         req->rq_commit_cb = mdc_commit_delayed;
 831         req->rq_replay = 1;
 832         LASSERT(req->rq_cb_data == NULL);
 833         req->rq_cb_data = mod;
 834
 835         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 836         rc = ptlrpc_queue_wait(req);
 837         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 838
 839         if (req->rq_repmsg == NULL) {
 840                 CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
 841                        req->rq_status);
 842                 if (rc == 0)
 843                         rc = req->rq_status ?: -EIO;
 844         } else if (rc == 0 || rc == -EAGAIN) {
 845                 struct mdt_body *body;
 846
 847                 rc = lustre_msg_get_status(req->rq_repmsg);
 848                 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
 849                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
 850                                   "= %d", rc);
 851                         if (rc > 0)
 852                                 rc = -rc;
 853                 } else if (mod == NULL) {
 854                         if (req->rq_import->imp_replayable)
 855                                 CERROR("Unexpected: can't find md_open_data,"
 856                                        "but close succeeded with replayable imp"
 857                                        "Please tell CFS.\n");
 858                 }
 859
 860                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 861                 if (body == NULL)
 862                         rc = -EPROTO;
 863         }
 864
 865         EXIT;
 866         if (rc != 0 && rc != -EAGAIN && req && req->rq_commit_cb)
 867                 req->rq_commit_cb(req);
 868
 869         *request = req;
 870         return rc;
 871 }
 872
 873 int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 874                      struct md_open_data *mod)
 875 {
 876         struct obd_device     *obd = class_exp2obd(exp);
 877         struct ptlrpc_request *req;
 878         int                    rc;
 879         ENTRY;
 880
 881         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 882                                    &RQF_MDS_DONE_WRITING);
 883         if (req == NULL)
 884                 RETURN(-ENOMEM);
 885
 886         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 887         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_DONE_WRITING);
 888         if (rc) {
 889                 ptlrpc_request_free(req);
 890                 RETURN(rc);
 891         }
 892
 893         /* XXX: add DONE_WRITING request to och -- when Size-on-MDS
 894          * recovery will be ready. */
 895         mdc_close_pack(req, op_data);
 896         ptlrpc_request_set_replen(req);
 897         req->rq_replay = 1;
 898         req->rq_cb_data = mod;
 899         req->rq_commit_cb = mdc_commit_delayed;
 900         if (likely(mod != NULL))
 901                 list_add_tail(&req->rq_mod_list, &mod->mod_replay_list);
 902         else
 903                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 904
 905         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 906         rc = ptlrpc_queue_wait(req);
 907         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 908
 909         /* Close the open replay sequence if an error occured or no SOM
 910          * attribute update is needed. */
 911         if (rc != -EAGAIN)
 912                 ptlrpc_close_replay_seq(req);
 913
 914         if (rc && rc != -EAGAIN && req->rq_commit_cb)
 915                 req->rq_commit_cb(req);
 916
 917         ptlrpc_req_finished(req);
 918         RETURN(rc);
 919 }
 920
 921 #ifdef HAVE_SPLIT_SUPPORT
 922 int mdc_sendpage(struct obd_export *exp, const struct lu_fid *fid,
 923                  const struct page *page, int offset)
 924 {
 925         struct ptlrpc_request   *req;
 926         struct ptlrpc_bulk_desc *desc;
 927         int                      rc;
 928         ENTRY;
 929
 930         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_WRITEPAGE);
 931         if (req == NULL)
 932                 RETURN(-ENOMEM);
 933
 934         /* FIXME: capa doesn't support split yet */
 935         mdc_set_capa_size(req, &RMF_CAPA1, NULL);
 936
 937         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_WRITEPAGE);
 938         if (rc) {
 939                 ptlrpc_request_free(req);
 940                 RETURN(rc);
 941         }
 942
 943         req->rq_request_portal = MDS_READPAGE_PORTAL;
 944
 945         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_GET_SOURCE, MDS_BULK_PORTAL);
 946         if (desc == NULL)
 947                 GOTO(out, rc = -ENOMEM);
 948
 949         /* NB req now owns desc and will free it when it gets freed. */
 950         ptlrpc_prep_bulk_page(desc, (struct page *)page, 0, offset);
 951         mdc_readdir_pack(req, 0, offset, fid, NULL);
 952
 953         ptlrpc_request_set_replen(req);
 954         rc = ptlrpc_queue_wait(req);
 955         GOTO(out, rc);
 956 out:
 957         ptlrpc_req_finished(req);
 958         return rc;
 959 }
 960 EXPORT_SYMBOL(mdc_sendpage);
 961 #endif
 962
 963 int mdc_readpage(struct obd_export *exp, const struct lu_fid *fid,
 964                  struct obd_capa *oc, __u64 offset, struct page *page,
 965                  struct ptlrpc_request **request)
 966 {
 967         struct ptlrpc_request   *req;
 968         struct ptlrpc_bulk_desc *desc;
 969         int                      rc;
 970         ENTRY;
 971
 972         *request = NULL;
 973         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
 974         if (req == NULL)
 975                 RETURN(-ENOMEM);
 976
 977         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 978
 979         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
 980         if (rc) {
 981                 ptlrpc_request_free(req);
 982                 RETURN(rc);
 983         }
 984
 985         /* XXX FIXME bug 249 */
 986         req->rq_request_portal = MDS_READPAGE_PORTAL;
 987         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_PUT_SINK, MDS_BULK_PORTAL);
 988         if (desc == NULL) {
 989                 ptlrpc_request_free(req);
 990                 RETURN(-ENOMEM);
 991         }
 992
 993         /* NB req now owns desc and will free it when it gets freed */
 994         ptlrpc_prep_bulk_page(desc, page, 0, CFS_PAGE_SIZE);
 995         mdc_readdir_pack(req, offset, CFS_PAGE_SIZE, fid, oc);
 996
 997         ptlrpc_request_set_replen(req);
 998         rc = ptlrpc_queue_wait(req);
 999         if (rc) {
1000                 ptlrpc_req_finished(req);
1001                 RETURN(rc);
1002         }
1003
1004         if (req->rq_bulk->bd_nob_transferred != CFS_PAGE_SIZE) {
1005                 CERROR("Unexpected # bytes transferred: %d (%ld expected)\n",
1006                         req->rq_bulk->bd_nob_transferred, CFS_PAGE_SIZE);
1007                 ptlrpc_req_finished(req);
1008                 RETURN(-EPROTO);
1009         }
1010
1011         *request = req;
1012         RETURN(0);
1013 }
1014
1015 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1016                          void *karg, void *uarg)
1017 {
1018         struct obd_device *obd = exp->exp_obd;
1019         struct obd_ioctl_data *data = karg;
1020         struct obd_import *imp = obd->u.cli.cl_import;
1021         struct llog_ctxt *ctxt;
1022         int rc;
1023         ENTRY;
1024
1025         if (!try_module_get(THIS_MODULE)) {
1026                 CERROR("Can't get module. Is it alive?");
1027                 return -EINVAL;
1028         }
1029         switch (cmd) {
1030         case OBD_IOC_CLIENT_RECOVER:
1031                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1);
1032                 if (rc < 0)
1033                         GOTO(out, rc);
1034                 GOTO(out, rc = 0);
1035         case IOC_OSC_SET_ACTIVE:
1036                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
1037                 GOTO(out, rc);
1038         case OBD_IOC_PARSE: {
1039                 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
1040                 rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
1041                 llog_ctxt_put(ctxt);
1042                 GOTO(out, rc);
1043         }
1044 #ifdef __KERNEL__
1045         case OBD_IOC_LLOG_INFO:
1046         case OBD_IOC_LLOG_PRINT: {
1047                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1048                 rc = llog_ioctl(ctxt, cmd, data);
1049                 llog_ctxt_put(ctxt);
1050                 GOTO(out, rc);
1051         }
1052 #endif
1053         case OBD_IOC_POLL_QUOTACHECK:
1054                 rc = lquota_poll_check(quota_interface, exp,
1055                                        (struct if_quotacheck *)karg);
1056                 GOTO(out, rc);
1057         default:
1058                 CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd);
1059                 GOTO(out, rc = -ENOTTY);
1060         }
1061 out:
1062         module_put(THIS_MODULE);
1063
1064         return rc;
1065 }
1066
1067 static int do_set_info_async(struct obd_export *exp,
1068                              obd_count keylen, void *key,
1069                              obd_count vallen, void *val,
1070                              struct ptlrpc_request_set *set)
1071 {
1072         struct obd_import     *imp = class_exp2cliimp(exp);
1073         struct ptlrpc_request *req;
1074         char                  *tmp;
1075         int                    rc;
1076         ENTRY;
1077
1078         if (vallen != sizeof(int))
1079                 RETURN(-EINVAL);
1080
1081         spin_lock(&imp->imp_lock);
1082         if (*((int *)val)) {
1083                 imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
1084                 imp->imp_connect_data.ocd_connect_flags |= OBD_CONNECT_RDONLY;
1085         } else {
1086                 imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
1087                 imp->imp_connect_data.ocd_connect_flags &= ~OBD_CONNECT_RDONLY;
1088         }
1089         spin_unlock(&imp->imp_lock);
1090
1091         req = ptlrpc_request_alloc(imp, &RQF_MDS_SET_INFO);
1092         if (req == NULL)
1093                 RETURN(-ENOMEM);
1094
1095         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
1096                              RCL_CLIENT, keylen);
1097         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
1098                              RCL_CLIENT, vallen);
1099         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SET_INFO);
1100         if (rc) {
1101                 ptlrpc_request_free(req);
1102                 RETURN(rc);
1103         }
1104
1105         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1106         memcpy(tmp, key, keylen);
1107         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1108         memcpy(tmp, val, vallen);
1109
1110         ptlrpc_request_set_replen(req);
1111
1112         if (set) {
1113                 ptlrpc_set_add_req(set, req);
1114                 ptlrpc_check_set(set);
1115         } else {
1116                 rc = ptlrpc_queue_wait(req);
1117                 ptlrpc_req_finished(req);
1118         }
1119
1120         RETURN(rc);
1121 }
1122
1123 int mdc_set_info_async(struct obd_export *exp,
1124                        obd_count keylen, void *key,
1125                        obd_count vallen, void *val,
1126                        struct ptlrpc_request_set *set)
1127 {
1128         struct obd_import *imp = class_exp2cliimp(exp);
1129         int                rc = -EINVAL;
1130         ENTRY;
1131
1132         if (KEY_IS(KEY_INIT_RECOV)) {
1133                 if (vallen != sizeof(int))
1134                         RETURN(-EINVAL);
1135                 spin_lock(&imp->imp_lock);
1136                 imp->imp_initial_recov = *(int *)val;
1137                 spin_unlock(&imp->imp_lock);
1138                 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
1139                        exp->exp_obd->obd_name, imp->imp_initial_recov);
1140                 RETURN(0);
1141         }
1142         /* Turn off initial_recov after we try all backup servers once */
1143         if (KEY_IS(KEY_INIT_RECOV_BACKUP)) {
1144                 if (vallen != sizeof(int))
1145                         RETURN(-EINVAL);
1146                 spin_lock(&imp->imp_lock);
1147                 imp->imp_initial_recov_bk = *(int *)val;
1148                 if (imp->imp_initial_recov_bk)
1149                         imp->imp_initial_recov = 1;
1150                 spin_unlock(&imp->imp_lock);
1151                 CDEBUG(D_HA, "%s: set imp_initial_recov_bk = %d\n",
1152                        exp->exp_obd->obd_name, imp->imp_initial_recov_bk);
1153                 RETURN(0);
1154         }
1155         if (KEY_IS(KEY_READ_ONLY)) {
1156                 rc = do_set_info_async(exp, keylen, key, vallen, val, set);
1157                 RETURN(rc);
1158         }
1159         if (KEY_IS(KEY_FLUSH_CTX)) {
1160                 sptlrpc_import_flush_my_ctx(imp);
1161                 RETURN(0);
1162         }
1163         if (KEY_IS(KEY_MDS_CONN)) {
1164                 struct obd_import *imp = class_exp2cliimp(exp);
1165
1166                 /* mds-mds import */
1167                 spin_lock(&imp->imp_lock);
1168                 imp->imp_server_timeout = 1;
1169                 spin_unlock(&imp->imp_lock);
1170                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1171                 CDEBUG(D_OTHER|D_WARNING, "%s: timeout / 2\n", exp->exp_obd->obd_name);
1172                 RETURN(0);
1173         }
1174
1175         RETURN(rc);
1176 }
1177
1178 int mdc_get_info(struct obd_export *exp, __u32 keylen, void *key,
1179                  __u32 *vallen, void *val)
1180 {
1181         int rc = -EINVAL;
1182
1183         if (KEY_IS(KEY_MAX_EASIZE)) {
1184                 int mdsize, *max_easize;
1185
1186                 if (*vallen != sizeof(int))
1187                         RETURN(-EINVAL);
1188                 mdsize = *(int*)val;
1189                 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
1190                         exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
1191                 max_easize = val;
1192                 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
1193                 RETURN(0);
1194         }
1195         if (KEY_IS(KEY_CONN_DATA)) {
1196                 struct obd_import *imp = class_exp2cliimp(exp);
1197                 struct obd_connect_data *data = val;
1198
1199                 if (*vallen != sizeof(*data))
1200                         RETURN(-EINVAL);
1201
1202                 *data = imp->imp_connect_data;
1203                 RETURN(0);
1204         }
1205
1206         RETURN(rc);
1207 }
1208
1209 static int mdc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1210                       __u64 max_age)
1211 {
1212         struct ptlrpc_request *req;
1213         struct obd_statfs     *msfs;
1214         int                    rc;
1215         ENTRY;
1216
1217         req = ptlrpc_request_alloc_pack(obd->u.cli.cl_import, &RQF_MDS_STATFS,
1218                                         LUSTRE_MDS_VERSION, MDS_STATFS);
1219         if (req == NULL)
1220                 RETURN(-ENOMEM);
1221
1222         ptlrpc_request_set_replen(req);
1223
1224         rc = ptlrpc_queue_wait(req);
1225         if (rc) {
1226                 /* check connection error first */
1227                 if (obd->u.cli.cl_import->imp_connect_error)
1228                         rc = obd->u.cli.cl_import->imp_connect_error;
1229                 GOTO(out, rc);
1230         }
1231
1232         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1233         if (msfs == NULL)
1234                 GOTO(out, rc = -EPROTO);
1235
1236         *osfs = *msfs;
1237         EXIT;
1238 out:
1239         ptlrpc_req_finished(req);
1240         return rc;
1241 }
1242
1243 static int mdc_pin(struct obd_export *exp, const struct lu_fid *fid,
1244                    struct obd_capa *oc, struct obd_client_handle *handle,
1245                    int flags)
1246 {
1247         struct ptlrpc_request *req;
1248         struct mdt_body       *body;
1249         int                    rc;
1250         ENTRY;
1251
1252         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_PIN);
1253         if (req == NULL)
1254                 RETURN(-ENOMEM);
1255
1256         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1257
1258         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_PIN);
1259         if (rc) {
1260                 ptlrpc_request_free(req);
1261                 RETURN(rc);
1262         }
1263
1264         mdc_pack_body(req, fid, oc, 0, 0, -1, flags);
1265
1266         ptlrpc_request_set_replen(req);
1267
1268         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1269         rc = ptlrpc_queue_wait(req);
1270         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1271         if (rc) {
1272                 CERROR("Pin failed: %d\n", rc);
1273                 GOTO(err_out, rc);
1274         }
1275
1276         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1277         if (body == NULL)
1278                 GOTO(err_out, rc = -EPROTO);
1279
1280         handle->och_fh = body->handle;
1281         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
1282
1283         OBD_ALLOC_PTR(handle->och_mod);
1284         if (handle->och_mod == NULL) {
1285                 DEBUG_REQ(D_ERROR, req, "can't allocate mdc_open_data");
1286                 GOTO(err_out, rc = -ENOMEM);
1287         }
1288         /* will be dropped by unpin */
1289         CFS_INIT_LIST_HEAD(&handle->och_mod->mod_replay_list);
1290         list_add_tail(&req->rq_mod_list, &handle->och_mod->mod_replay_list);
1291
1292         RETURN(0);
1293
1294 err_out:
1295         ptlrpc_req_finished(req);
1296         RETURN(rc);
1297 }
1298
1299 static int mdc_unpin(struct obd_export *exp, struct obd_client_handle *handle,
1300                      int flag)
1301 {
1302         struct ptlrpc_request *req;
1303         struct mdt_body       *body;
1304         int                    rc;
1305         ENTRY;
1306
1307         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_UNPIN,
1308                                         LUSTRE_MDS_VERSION, MDS_UNPIN);
1309         if (req == NULL)
1310                 RETURN(-ENOMEM);
1311
1312         body = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY);
1313         body->handle = handle->och_fh;
1314         body->flags = flag;
1315
1316         ptlrpc_request_set_replen(req);
1317
1318         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1319         rc = ptlrpc_queue_wait(req);
1320         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1321
1322         if (rc != 0)
1323                 CERROR("Unpin failed: %d\n", rc);
1324
1325         ptlrpc_req_finished(req);
1326
1327         LASSERT(!list_empty(&handle->och_mod->mod_replay_list));
1328         req = list_entry(handle->och_mod->mod_replay_list.next,
1329                          typeof(*req), rq_mod_list);
1330         list_del_init(&req->rq_mod_list);
1331         ptlrpc_req_finished(req);
1332         LASSERT(list_empty(&handle->och_mod->mod_replay_list));
1333
1334         OBD_FREE(handle->och_mod, sizeof(*handle->och_mod));
1335         RETURN(rc);
1336 }
1337
1338 int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
1339              struct obd_capa *oc, struct ptlrpc_request **request)
1340 {
1341         struct ptlrpc_request *req;
1342         int                    rc;
1343         ENTRY;
1344
1345         *request = NULL;
1346         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
1347         if (req == NULL)
1348                 RETURN(-ENOMEM);
1349
1350         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1351
1352         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
1353         if (rc) {
1354                 ptlrpc_request_free(req);
1355                 RETURN(rc);
1356         }
1357
1358         mdc_pack_body(req, fid, oc, 0, 0, -1, 0);
1359
1360         ptlrpc_request_set_replen(req);
1361
1362         rc = ptlrpc_queue_wait(req);
1363         if (rc)
1364                 ptlrpc_req_finished(req);
1365         else
1366                 *request = req;
1367         RETURN(rc);
1368 }
1369
1370 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
1371                             enum obd_import_event event)
1372 {
1373         int rc = 0;
1374
1375         LASSERT(imp->imp_obd == obd);
1376
1377         switch (event) {
1378         case IMP_EVENT_DISCON: {
1379 #if 0
1380                 /* XXX Pass event up to OBDs stack. used only for FLD now */
1381                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
1382 #endif
1383                 break;
1384         }
1385         case IMP_EVENT_INACTIVE: {
1386                 struct client_obd *cli = &obd->u.cli;
1387                 /*
1388                  * Flush current sequence to make client obtain new one
1389                  * from server in case of disconnect/reconnect.
1390                  * If range is already empty then no need to flush it.
1391                  */
1392                 if (cli->cl_seq != NULL &&
1393                     !range_is_exhausted(&cli->cl_seq->lcs_space)) {
1394                         seq_client_flush(cli->cl_seq);
1395                 }
1396
1397                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
1398                 break;
1399         }
1400         case IMP_EVENT_INVALIDATE: {
1401                 struct ldlm_namespace *ns = obd->obd_namespace;
1402
1403                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
1404
1405                 break;
1406         }
1407         case IMP_EVENT_ACTIVE: {
1408                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
1409                 break;
1410         }
1411         case IMP_EVENT_OCD:
1412                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
1413                 break;
1414
1415         default:
1416                 CERROR("Unknown import event %x\n", event);
1417                 LBUG();
1418         }
1419         RETURN(rc);
1420 }
1421
1422 static int mdc_fid_init(struct obd_export *exp)
1423 {
1424         struct client_obd *cli = &exp->exp_obd->u.cli;
1425         char *prefix;
1426         int rc;
1427         ENTRY;
1428
1429         OBD_ALLOC_PTR(cli->cl_seq);
1430         if (cli->cl_seq == NULL)
1431                 RETURN(-ENOMEM);
1432
1433         OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
1434         if (prefix == NULL)
1435                 GOTO(out_free_seq, rc = -ENOMEM);
1436
1437         snprintf(prefix, MAX_OBD_NAME + 5, "srv-%s",
1438                  exp->exp_obd->obd_name);
1439
1440         /* Init client side sequence-manager */
1441         rc = seq_client_init(cli->cl_seq, exp,
1442                              LUSTRE_SEQ_METADATA,
1443                              prefix, NULL);
1444         OBD_FREE(prefix, MAX_OBD_NAME + 5);
1445         if (rc)
1446                 GOTO(out_free_seq, rc);
1447
1448         RETURN(rc);
1449 out_free_seq:
1450         OBD_FREE_PTR(cli->cl_seq);
1451         cli->cl_seq = NULL;
1452         return rc;
1453 }
1454
1455 static int mdc_fid_fini(struct obd_export *exp)
1456 {
1457         struct client_obd *cli = &exp->exp_obd->u.cli;
1458         ENTRY;
1459
1460         if (cli->cl_seq != NULL) {
1461                 seq_client_fini(cli->cl_seq);
1462                 OBD_FREE_PTR(cli->cl_seq);
1463                 cli->cl_seq = NULL;
1464         }
1465
1466         RETURN(0);
1467 }
1468
1469 int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1470                   struct md_op_data *op_data)
1471 {
1472         struct client_obd *cli = &exp->exp_obd->u.cli;
1473         struct lu_client_seq *seq = cli->cl_seq;
1474         ENTRY;
1475         RETURN(seq_client_alloc_fid(seq, fid));
1476 }
1477
1478 /* XXX This method is used only to clear current fid seq
1479  * once fld/mds insert failed */
1480 static int mdc_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
1481 {
1482         struct client_obd *cli = &exp->exp_obd->u.cli;
1483
1484         seq_client_flush(cli->cl_seq);
1485         return 0;
1486 }
1487
1488 static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
1489 {
1490         struct client_obd *cli = &obd->u.cli;
1491         struct lprocfs_static_vars lvars = { 0 };
1492         int rc;
1493         ENTRY;
1494
1495         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1496         if (!cli->cl_rpc_lock)
1497                 RETURN(-ENOMEM);
1498         mdc_init_rpc_lock(cli->cl_rpc_lock);
1499
1500         ptlrpcd_addref();
1501
1502         OBD_ALLOC(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1503         if (!cli->cl_setattr_lock)
1504                 GOTO(err_rpc_lock, rc = -ENOMEM);
1505         mdc_init_rpc_lock(cli->cl_setattr_lock);
1506
1507         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1508         if (!cli->cl_close_lock)
1509                 GOTO(err_setattr_lock, rc = -ENOMEM);
1510         mdc_init_rpc_lock(cli->cl_close_lock);
1511
1512         rc = client_obd_setup(obd, cfg);
1513         if (rc)
1514                 GOTO(err_close_lock, rc);
1515         lprocfs_mdc_init_vars(&lvars);
1516         lprocfs_obd_setup(obd, lvars.obd_vars);
1517         sptlrpc_lprocfs_cliobd_attach(obd);
1518         ptlrpc_lprocfs_register_obd(obd);
1519
1520         rc = obd_llog_init(obd, OBD_LLOG_GROUP, obd, 0, NULL, NULL);
1521         if (rc) {
1522                 mdc_cleanup(obd);
1523                 CERROR("failed to setup llogging subsystems\n");
1524         }
1525
1526         RETURN(rc);
1527
1528 err_close_lock:
1529         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1530 err_setattr_lock:
1531         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1532 err_rpc_lock:
1533         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1534         ptlrpcd_decref();
1535         RETURN(rc);
1536 }
1537
1538 /* Initialize the default and maximum LOV EA and cookie sizes.  This allows
1539  * us to make MDS RPCs with large enough reply buffers to hold the
1540  * maximum-sized (= maximum striped) EA and cookie without having to
1541  * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
1542 int mdc_init_ea_size(struct obd_export *exp, int easize,
1543                      int def_easize, int cookiesize)
1544 {
1545         struct obd_device *obd = exp->exp_obd;
1546         struct client_obd *cli = &obd->u.cli;
1547         ENTRY;
1548
1549         if (cli->cl_max_mds_easize < easize)
1550                 cli->cl_max_mds_easize = easize;
1551
1552         if (cli->cl_default_mds_easize < def_easize)
1553                 cli->cl_default_mds_easize = def_easize;
1554
1555         if (cli->cl_max_mds_cookiesize < cookiesize)
1556                 cli->cl_max_mds_cookiesize = cookiesize;
1557
1558         RETURN(0);
1559 }
1560
1561 static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
1562 {
1563         int rc = 0;
1564         ENTRY;
1565
1566         switch (stage) {
1567         case OBD_CLEANUP_EARLY:
1568         case OBD_CLEANUP_EXPORTS:
1569                 /* If we set up but never connected, the
1570                    client import will not have been cleaned. */
1571                 if (obd->u.cli.cl_import) {
1572                         struct obd_import *imp;
1573                         imp = obd->u.cli.cl_import;
1574                         CERROR("client import never connected\n");
1575                         ptlrpc_invalidate_import(imp);
1576                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
1577                         class_destroy_import(imp);
1578                         obd->u.cli.cl_import = NULL;
1579                 }
1580                 break;
1581         case OBD_CLEANUP_SELF_EXP:
1582                 rc = obd_llog_finish(obd, 0);
1583                 if (rc != 0)
1584                         CERROR("failed to cleanup llogging subsystems\n");
1585         case OBD_CLEANUP_OBD:
1586                 break;
1587         }
1588         RETURN(rc);
1589 }
1590
1591 static int mdc_cleanup(struct obd_device *obd)
1592 {
1593         struct client_obd *cli = &obd->u.cli;
1594
1595         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1596         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1597         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1598
1599         ptlrpc_lprocfs_unregister_obd(obd);
1600         lprocfs_obd_cleanup(obd);
1601         ptlrpcd_decref();
1602
1603         return client_obd_cleanup(obd);
1604 }
1605
1606
1607 static int mdc_llog_init(struct obd_device *obd, int group,
1608                          struct obd_device *tgt, int count,
1609                          struct llog_catid *logid, struct obd_uuid *uuid)
1610 {
1611         struct llog_ctxt *ctxt;
1612         struct obd_llog_group *olg = &obd->obd_olg;
1613         int rc;
1614         ENTRY;
1615
1616         LASSERT(group == OBD_LLOG_GROUP);
1617         LASSERT(olg->olg_group == group);
1618
1619         rc = llog_setup(obd, olg, LLOG_LOVEA_REPL_CTXT, tgt, 0,
1620                         NULL, &llog_client_ops);
1621         if (rc == 0) {
1622                 ctxt = llog_get_context(obd, LLOG_LOVEA_REPL_CTXT);
1623                 llog_initiator_connect(ctxt);
1624                 llog_ctxt_put(ctxt);
1625         }
1626
1627         RETURN(rc);
1628 }
1629
1630 static int mdc_llog_finish(struct obd_device *obd, int count)
1631 {
1632         struct llog_ctxt *ctxt;
1633         int rc = 0;
1634         ENTRY;
1635
1636         ctxt = llog_get_context(obd, LLOG_LOVEA_REPL_CTXT);
1637         if (ctxt)
1638                 rc = llog_cleanup(ctxt);
1639
1640         RETURN(rc);
1641 }
1642
1643 static int mdc_process_config(struct obd_device *obd, obd_count len, void *buf)
1644 {
1645         struct lustre_cfg *lcfg = buf;
1646         struct lprocfs_static_vars lvars = { 0 };
1647         int rc = 0;
1648
1649         lprocfs_mdc_init_vars(&lvars);
1650
1651         switch (lcfg->lcfg_command) {
1652         case LCFG_SPTLRPC_CONF:
1653                 rc = sptlrpc_cliobd_process_config(obd, lcfg);
1654                 break;
1655         default:
1656                 rc = class_process_proc_param(PARAM_MDC, lvars.obd_vars,
1657                                               lcfg, obd);
1658                 break;
1659         }
1660         return(rc);
1661 }
1662
1663
1664 /* get remote permission for current user on fid */
1665 int mdc_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
1666                         struct obd_capa *oc, __u32 suppgid,
1667                         struct ptlrpc_request **request)
1668 {
1669         struct ptlrpc_request  *req;
1670         int                    rc;
1671         ENTRY;
1672
1673         LASSERT(client_is_remote(exp));
1674
1675         *request = NULL;
1676         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
1677         if (req == NULL)
1678                 RETURN(-ENOMEM);
1679
1680         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1681
1682         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
1683         if (rc) {
1684                 ptlrpc_request_free(req);
1685                 RETURN(rc);
1686         }
1687
1688         mdc_pack_body(req, fid, oc, OBD_MD_FLRMTPERM, 0, suppgid, 0);
1689
1690         req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
1691                              sizeof(struct mdt_remote_perm));
1692
1693         ptlrpc_request_set_replen(req);
1694
1695         rc = ptlrpc_queue_wait(req);
1696         if (rc)
1697                 ptlrpc_req_finished(req);
1698         else
1699                 *request = req;
1700         RETURN(rc);
1701 }
1702
1703 static int mdc_interpret_renew_capa(struct ptlrpc_request *req, void *unused,
1704                                     int status)
1705 {
1706         struct obd_capa *oc = req->rq_async_args.pointer_arg[0];
1707         renew_capa_cb_t cb = req->rq_async_args.pointer_arg[1];
1708         struct mdt_body *body = NULL;
1709         struct lustre_capa *capa;
1710         ENTRY;
1711
1712         if (status)
1713                 GOTO(out, capa = ERR_PTR(status));
1714
1715         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1716         if (body == NULL)
1717                 GOTO(out, capa = ERR_PTR(-EFAULT));
1718
1719         if ((body->valid & OBD_MD_FLOSSCAPA) == 0)
1720                 GOTO(out, capa = ERR_PTR(-ENOENT));
1721
1722         capa = req_capsule_server_get(&req->rq_pill, &RMF_CAPA2);
1723         if (!capa)
1724                 GOTO(out, capa = ERR_PTR(-EFAULT));
1725         EXIT;
1726 out:
1727         cb(oc, capa);
1728         return 0;
1729 }
1730
1731 static int mdc_renew_capa(struct obd_export *exp, struct obd_capa *oc,
1732                           renew_capa_cb_t cb)
1733 {
1734         struct ptlrpc_request *req;
1735         ENTRY;
1736
1737         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_GETATTR,
1738                                         LUSTRE_MDS_VERSION, MDS_GETATTR);
1739         if (req == NULL)
1740                 RETURN(-ENOMEM);
1741
1742         /* NB, OBD_MD_FLOSSCAPA is set here, but it doesn't necessarily mean the
1743          * capa to renew is oss capa.
1744          */
1745         mdc_pack_body(req, &oc->c_capa.lc_fid, oc, OBD_MD_FLOSSCAPA, 0, -1, 0);
1746         ptlrpc_request_set_replen(req);
1747
1748         req->rq_async_args.pointer_arg[0] = oc;
1749         req->rq_async_args.pointer_arg[1] = cb;
1750         req->rq_interpret_reply = mdc_interpret_renew_capa;
1751         ptlrpcd_add_req(req);
1752         RETURN(0);
1753 }
1754
1755 static int mdc_connect(const struct lu_env *env,
1756                        struct lustre_handle *dlm_handle,
1757                        struct obd_device *obd, struct obd_uuid *cluuid,
1758                        struct obd_connect_data *data)
1759 {
1760         struct obd_import *imp = obd->u.cli.cl_import;
1761
1762         /* mds-mds import features */
1763         if (data && (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS)) {
1764                 spin_lock(&imp->imp_lock);
1765                 imp->imp_server_timeout = 1;
1766                 spin_unlock(&imp->imp_lock);
1767                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1768                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
1769                        obd->obd_name);
1770         }
1771
1772         return client_connect_import(env, dlm_handle, obd, cluuid, data);
1773 }
1774
1775 struct obd_ops mdc_obd_ops = {
1776         .o_owner            = THIS_MODULE,
1777         .o_setup            = mdc_setup,
1778         .o_precleanup       = mdc_precleanup,
1779         .o_cleanup          = mdc_cleanup,
1780         .o_add_conn         = client_import_add_conn,
1781         .o_del_conn         = client_import_del_conn,
1782         .o_connect          = mdc_connect,
1783         .o_disconnect       = client_disconnect_export,
1784         .o_iocontrol        = mdc_iocontrol,
1785         .o_set_info_async   = mdc_set_info_async,
1786         .o_statfs           = mdc_statfs,
1787         .o_pin              = mdc_pin,
1788         .o_unpin            = mdc_unpin,
1789         .o_fid_init         = mdc_fid_init,
1790         .o_fid_fini         = mdc_fid_fini,
1791         .o_fid_alloc        = mdc_fid_alloc,
1792         .o_fid_delete       = mdc_fid_delete,
1793         .o_import_event     = mdc_import_event,
1794         .o_llog_init        = mdc_llog_init,
1795         .o_llog_finish      = mdc_llog_finish,
1796         .o_get_info         = mdc_get_info,
1797         .o_process_config  = mdc_process_config,
1798 };
1799
1800 struct md_ops mdc_md_ops = {
1801         .m_getstatus        = mdc_getstatus,
1802         .m_change_cbdata    = mdc_change_cbdata,
1803         .m_close            = mdc_close,
1804         .m_create           = mdc_create,
1805         .m_done_writing     = mdc_done_writing,
1806         .m_enqueue          = mdc_enqueue,
1807         .m_getattr          = mdc_getattr,
1808         .m_getattr_name     = mdc_getattr_name,
1809         .m_intent_lock      = mdc_intent_lock,
1810         .m_link             = mdc_link,
1811         .m_is_subdir        = mdc_is_subdir,
1812         .m_rename           = mdc_rename,
1813         .m_setattr          = mdc_setattr,
1814         .m_setxattr         = mdc_setxattr,
1815         .m_getxattr         = mdc_getxattr,
1816         .m_sync             = mdc_sync,
1817         .m_readpage         = mdc_readpage,
1818         .m_unlink           = mdc_unlink,
1819         .m_cancel_unused    = mdc_cancel_unused,
1820         .m_init_ea_size     = mdc_init_ea_size,
1821         .m_set_lock_data    = mdc_set_lock_data,
1822         .m_lock_match       = mdc_lock_match,
1823         .m_get_lustre_md    = mdc_get_lustre_md,
1824         .m_free_lustre_md   = mdc_free_lustre_md,
1825         .m_set_open_replay_data = mdc_set_open_replay_data,
1826         .m_clear_open_replay_data = mdc_clear_open_replay_data,
1827         .m_get_remote_perm  = mdc_get_remote_perm,
1828         .m_renew_capa       = mdc_renew_capa
1829 };
1830
1831 extern quota_interface_t mdc_quota_interface;
1832
1833 int __init mdc_init(void)
1834 {
1835         int rc;
1836         struct lprocfs_static_vars lvars = { 0 };
1837         lprocfs_mdc_init_vars(&lvars);
1838
1839         request_module("lquota");
1840         quota_interface = PORTAL_SYMBOL_GET(mdc_quota_interface);
1841         init_obd_quota_ops(quota_interface, &mdc_obd_ops);
1842
1843         rc = class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
1844                                  LUSTRE_MDC_NAME, NULL);
1845         if (rc && quota_interface)
1846                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1847
1848         RETURN(rc);
1849 }
1850
1851 #ifdef __KERNEL__
1852 static void /*__exit*/ mdc_exit(void)
1853 {
1854         if (quota_interface)
1855                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1856
1857         class_unregister_type(LUSTRE_MDC_NAME);
1858 }
1859
1860 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1861 MODULE_DESCRIPTION("Lustre Metadata Client");
1862 MODULE_LICENSE("GPL");
1863
1864 module_init(mdc_init);
1865 module_exit(mdc_exit);
1866 #endif