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                 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
 230                                      sizeof(struct mdt_remote_perm));
 231         ptlrpc_request_set_replen(req);
 232
 233         rc = mdc_getattr_common(exp, req);
 234         if (rc)
 235                 ptlrpc_req_finished(req);
 236         else
 237                 *request = req;
 238         RETURN(rc);
 239 }
 240
 241 int mdc_getattr_name(struct obd_export *exp, const struct lu_fid *fid,
 242                      struct obd_capa *oc, const char *filename, int namelen,
 243                      obd_valid valid, int ea_size, __u32 suppgid,
 244                      struct ptlrpc_request **request)
 245 {
 246         struct ptlrpc_request *req;
 247         int                    rc;
 248         ENTRY;
 249
 250         *request = NULL;
 251         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 252                                    &RQF_MDS_GETATTR_NAME);
 253         if (req == NULL)
 254                 RETURN(-ENOMEM);
 255
 256         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 257         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT, namelen);
 258
 259         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR_NAME);
 260         if (rc) {
 261                 ptlrpc_request_free(req);
 262                 RETURN(rc);
 263         }
 264
 265         /* MDS_BFLAG_EXT_FLAGS: request "new" flags(bug 9486) */
 266         mdc_pack_body(req, fid, oc, valid, ea_size, suppgid,
 267                       MDS_BFLAG_EXT_FLAGS);
 268
 269         if (filename) {
 270                 char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 271                 LASSERT(strnlen(filename, namelen) == namelen - 1);
 272                 memcpy(name, filename, namelen);
 273         }
 274
 275         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, ea_size);
 276         ptlrpc_request_set_replen(req);
 277
 278         rc = mdc_getattr_common(exp, req);
 279         if (rc)
 280                 ptlrpc_req_finished(req);
 281         else
 282                 *request = req;
 283         RETURN(rc);
 284 }
 285
 286 static int mdc_is_subdir(struct obd_export *exp,
 287                          const struct lu_fid *pfid,
 288                          const struct lu_fid *cfid,
 289                          struct ptlrpc_request **request)
 290 {
 291         struct ptlrpc_request  *req;
 292         int                     rc;
 293
 294         ENTRY;
 295
 296         *request = NULL;
 297         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 298                                         &RQF_MDS_IS_SUBDIR, LUSTRE_MDS_VERSION,
 299                                         MDS_IS_SUBDIR);
 300         if (req == NULL)
 301                 RETURN(-ENOMEM);
 302
 303         mdc_is_subdir_pack(req, pfid, cfid, 0);
 304         ptlrpc_request_set_replen(req);
 305
 306         rc = ptlrpc_queue_wait(req);
 307         if (rc && rc != -EREMOTE)
 308                 ptlrpc_req_finished(req);
 309         else
 310                 *request = req;
 311         RETURN(rc);
 312 }
 313
 314 static int mdc_xattr_common(struct obd_export *exp,const struct req_format *fmt,
 315                             const struct lu_fid *fid,
 316                             struct obd_capa *oc, int opcode, obd_valid valid,
 317                             const char *xattr_name, const char *input,
 318                             int input_size, int output_size, int flags,
 319                             __u32 suppgid, struct ptlrpc_request **request)
 320 {
 321         struct ptlrpc_request *req;
 322         int   xattr_namelen = 0;
 323         char *tmp;
 324         int   rc;
 325         ENTRY;
 326
 327         *request = NULL;
 328         req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
 329         if (req == NULL)
 330                 RETURN(-ENOMEM);
 331
 332         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 333         if (xattr_name) {
 334                 xattr_namelen = strlen(xattr_name) + 1;
 335                 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
 336                                      xattr_namelen);
 337         }
 338         if (input_size) {
 339                 LASSERT(input);
 340                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
 341                                      input_size);
 342         }
 343
 344         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, opcode);
 345         if (rc) {
 346                 ptlrpc_request_free(req);
 347                 RETURN(rc);
 348         }
 349
 350         if (opcode == MDS_REINT) {
 351                 struct mdt_rec_setxattr *rec;
 352
 353                 CLASSERT(sizeof(struct mdt_rec_setxattr) ==
 354                          sizeof(struct mdt_rec_reint));
 355                 rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 356                 rec->sx_opcode = REINT_SETXATTR;
 357                 /* TODO:
 358                  *  cfs_curproc_fs{u,g}id() should replace
 359                  *  current->fs{u,g}id for portability.
 360                  */
 361                 rec->sx_fsuid  = current->fsuid;
 362                 rec->sx_fsgid  = current->fsgid;
 363                 rec->sx_cap    = current->cap_effective;
 364                 rec->sx_suppgid1 = suppgid;
 365                 rec->sx_suppgid1 = -1;
 366                 rec->sx_fid    = *fid;
 367                 rec->sx_valid  = valid;
 368                 rec->sx_size   = output_size;
 369                 rec->sx_flags  = flags;
 370
 371                 mdc_pack_capa(req, &RMF_CAPA1, oc);
 372         } else {
 373                 mdc_pack_body(req, fid, oc, valid, output_size, suppgid, flags);
 374         }
 375
 376         if (xattr_name) {
 377                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 378                 memcpy(tmp, xattr_name, xattr_namelen);
 379         }
 380         if (input_size) {
 381                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
 382                 memcpy(tmp, input, input_size);
 383         }
 384
 385         if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
 386                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
 387                                      RCL_SERVER, output_size);
 388         ptlrpc_request_set_replen(req);
 389
 390         /* make rpc */
 391         if (opcode == MDS_REINT)
 392                 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 393
 394         rc = ptlrpc_queue_wait(req);
 395
 396         if (opcode == MDS_REINT)
 397                 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 398
 399         if (rc)
 400                 ptlrpc_req_finished(req);
 401         else
 402                 *request = req;
 403         RETURN(rc);
 404 }
 405
 406 int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
 407                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 408                  const char *input, int input_size, int output_size,
 409                  int flags, __u32 suppgid, struct ptlrpc_request **request)
 410 {
 411         return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
 412                                 fid, oc, MDS_REINT, valid, xattr_name,
 413                                 input, input_size, output_size, flags,
 414                                 suppgid, request);
 415 }
 416
 417 int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
 418                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 419                  const char *input, int input_size, int output_size,
 420                  int flags, struct ptlrpc_request **request)
 421 {
 422         return mdc_xattr_common(exp, &RQF_MDS_GETXATTR,
 423                                 fid, oc, MDS_GETXATTR, valid, xattr_name,
 424                                 input, input_size, output_size, flags,
 425                                 -1, request);
 426 }
 427
 428 #ifdef CONFIG_FS_POSIX_ACL
 429 static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
 430 {
 431         struct req_capsule     *pill = &req->rq_pill;
 432         struct mdt_body        *body = md->body;
 433         struct posix_acl       *acl;
 434         void                   *buf;
 435         int                     rc;
 436         ENTRY;
 437
 438         if (!body->aclsize)
 439                 RETURN(0);
 440
 441         buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->aclsize);
 442
 443         if (!buf)
 444                 RETURN(-EPROTO);
 445
 446         acl = posix_acl_from_xattr(buf, body->aclsize);
 447         if (IS_ERR(acl)) {
 448                 rc = PTR_ERR(acl);
 449                 CERROR("convert xattr to acl: %d\n", rc);
 450                 RETURN(rc);
 451         }
 452
 453         rc = posix_acl_valid(acl);
 454         if (rc) {
 455                 CERROR("validate acl: %d\n", rc);
 456                 posix_acl_release(acl);
 457                 RETURN(rc);
 458         }
 459
 460         md->posix_acl = acl;
 461         RETURN(0);
 462 }
 463 #else
 464 #define mdc_unpack_acl(req, md) 0
 465 #endif
 466
 467 int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
 468                       struct obd_export *dt_exp, struct obd_export *md_exp,
 469                       struct lustre_md *md)
 470 {
 471         struct req_capsule *pill = &req->rq_pill;
 472         int rc;
 473         ENTRY;
 474
 475         LASSERT(md);
 476         memset(md, 0, sizeof(*md));
 477
 478         md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 479         LASSERT(md->body != NULL);
 480
 481         if (md->body->valid & OBD_MD_FLEASIZE) {
 482                 int lmmsize;
 483                 struct lov_mds_md *lmm;
 484
 485                 if (!S_ISREG(md->body->mode)) {
 486                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, should be a "
 487                                "regular file, but is not\n");
 488                         GOTO(out, rc = -EPROTO);
 489                 }
 490
 491                 if (md->body->eadatasize == 0) {
 492                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, "
 493                                "but eadatasize 0\n");
 494                         GOTO(out, rc = -EPROTO);
 495                 }
 496                 lmmsize = md->body->eadatasize;
 497                 lmm = req_capsule_server_sized_get(pill, &RMF_MDT_MD, lmmsize);
 498                 if (!lmm)
 499                         GOTO(out, rc = -EPROTO);
 500
 501                 rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize);
 502                 if (rc < 0)
 503                         GOTO(out, rc);
 504
 505                 if (rc < sizeof(*md->lsm)) {
 506                         CDEBUG(D_INFO, "lsm size too small: "
 507                                "rc < sizeof (*md->lsm) (%d < "LPSZ")\n",
 508                                rc, sizeof(*md->lsm));
 509                         GOTO(out, rc = -EPROTO);
 510                 }
 511
 512         } else if (md->body->valid & OBD_MD_FLDIREA) {
 513                 int lmvsize;
 514                 struct lov_mds_md *lmv;
 515
 516                 if(!S_ISDIR(md->body->mode)) {
 517                         CDEBUG(D_INFO, "OBD_MD_FLDIREA set, should be a "
 518                                "directory, but is not\n");
 519                         GOTO(out, rc = -EPROTO);
 520                 }
 521
 522                 if (md->body->eadatasize == 0) {
 523                         CDEBUG(D_INFO, "OBD_MD_FLDIREA is set, "
 524                                "but eadatasize 0\n");
 525                         RETURN(-EPROTO);
 526                 }
 527                 if (md->body->valid & OBD_MD_MEA) {
 528                         lmvsize = md->body->eadatasize;
 529                         lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 530                                                            lmvsize);
 531                         if (!lmv)
 532                                 GOTO(out, rc = -EPROTO);
 533
 534                         rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
 535                                           lmvsize);
 536                         if (rc < 0)
 537                                 GOTO(out, rc);
 538
 539                         if (rc < sizeof(*md->mea)) {
 540                                 CDEBUG(D_INFO, "size too small:  "
 541                                        "rc < sizeof(*md->mea) (%d < %d)\n",
 542                                         rc, sizeof(*md->mea));
 543                                 GOTO(out, rc = -EPROTO);
 544                         }
 545                 }
 546         }
 547         rc = 0;
 548
 549         if (md->body->valid & OBD_MD_FLRMTPERM) {
 550                 /* remote permission */
 551                 md->remote_perm = req_capsule_server_get(pill, &RMF_ACL);
 552                 if (!md->remote_perm)
 553                         GOTO(out, rc = -EPROTO);
 554         }
 555         else if (md->body->valid & OBD_MD_FLACL) {
 556                 /* for ACL, it's possible that FLACL is set but aclsize is zero.
 557                  * only when aclsize != 0 there's an actual segment for ACL
 558                  * in reply buffer.
 559                  */
 560                 if (md->body->aclsize) {
 561                         rc = mdc_unpack_acl(req, md);
 562                         if (rc)
 563                                 GOTO(out, rc);
 564 #ifdef CONFIG_FS_POSIX_ACL
 565                 } else {
 566                         md->posix_acl = NULL;
 567 #endif
 568                 }
 569         }
 570         if (md->body->valid & OBD_MD_FLMDSCAPA) {
 571                 struct obd_capa *oc = mdc_unpack_capa(req, &RMF_CAPA1);
 572
 573                 if (IS_ERR(oc))
 574                         GOTO(out, rc = PTR_ERR(oc));
 575                 md->mds_capa = oc;
 576         }
 577
 578         if (md->body->valid & OBD_MD_FLOSSCAPA) {
 579                 struct obd_capa *oc = mdc_unpack_capa(req, &RMF_CAPA2);
 580
 581                 if (IS_ERR(oc))
 582                         GOTO(out, rc = PTR_ERR(oc));
 583                 md->oss_capa = oc;
 584         }
 585
 586         EXIT;
 587 out:
 588         if (rc) {
 589                 if (md->oss_capa)
 590                         free_capa(md->oss_capa);
 591                 if (md->mds_capa)
 592                         free_capa(md->mds_capa);
 593 #ifdef CONFIG_FS_POSIX_ACL
 594                 posix_acl_release(md->posix_acl);
 595 #endif
 596                 if (md->lsm)
 597                         obd_free_memmd(dt_exp, &md->lsm);
 598         }
 599         return rc;
 600 }
 601
 602 int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
 603 {
 604         ENTRY;
 605         RETURN(0);
 606 }
 607
 608 static void mdc_replay_open(struct ptlrpc_request *req)
 609 {
 610         struct md_open_data *mod = req->rq_cb_data;
 611         struct ptlrpc_request *cur, *tmp;
 612         struct obd_client_handle *och;
 613         struct lustre_handle old;
 614         struct mdt_body *body;
 615         ENTRY;
 616
 617         if (mod == NULL) {
 618                 DEBUG_REQ(D_ERROR, req,
 619                           "Can't properly replay without open data.");
 620                 EXIT;
 621                 return;
 622         }
 623
 624         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 625         LASSERT(body != NULL);
 626
 627         och = mod->mod_och;
 628         if (och != NULL) {
 629                 struct lustre_handle *file_fh;
 630
 631                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 632
 633                 file_fh = &och->och_fh;
 634                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 635                        file_fh->cookie, body->handle.cookie);
 636                 old = *file_fh;
 637                 *file_fh = body->handle;
 638         }
 639         list_for_each_entry_safe(cur, tmp, &mod->mod_replay_list, rq_mod_list) {
 640                 int opc = lustre_msg_get_opc(cur->rq_reqmsg);
 641                 struct mdt_epoch *epoch = NULL;
 642
 643                 if (opc == MDS_CLOSE || opc == MDS_DONE_WRITING) {
 644                         epoch = req_capsule_client_get(&cur->rq_pill,
 645                                                &RMF_MDT_EPOCH);
 646                         LASSERT(epoch);
 647                         DEBUG_REQ(D_HA, cur, "updating %s body with new fh",
 648                                   opc == MDS_CLOSE ? "CLOSE" : "DONE_WRITING");
 649                 } else if (opc == MDS_REINT) {
 650                         struct mdt_rec_setattr *rec;
 651
 652                         /* Check this is REINT_SETATTR. */
 653                         rec = req_capsule_client_get(&cur->rq_pill,
 654                                                &RMF_REC_REINT);
 655                         LASSERT(rec && rec->sa_opcode == REINT_SETATTR);
 656
 657                         epoch = req_capsule_client_get(&cur->rq_pill,
 658                                                &RMF_MDT_EPOCH);
 659                         LASSERT(epoch);
 660                         DEBUG_REQ(D_HA, cur, "updating REINT_SETATTR body "
 661                                   "with new fh");
 662                 }
 663                 if (epoch) {
 664                         if (och != NULL)
 665                                 LASSERT(!memcmp(&old, &epoch->handle,
 666                                                 sizeof(old)));
 667                         epoch->handle = body->handle;
 668                 }
 669         }
 670         EXIT;
 671 }
 672
 673 void mdc_commit_delayed(struct ptlrpc_request *req)
 674 {
 675         struct md_open_data *mod = req->rq_cb_data;
 676         struct ptlrpc_request *cur, *tmp;
 677
 678         DEBUG_REQ(D_HA, req, "req committed");
 679
 680         if (mod == NULL)
 681                 return;
 682
 683         req->rq_cb_data = NULL;
 684         req->rq_commit_cb = NULL;
 685         list_del_init(&req->rq_mod_list);
 686         if (req->rq_sequence) {
 687                 list_for_each_entry_safe(cur, tmp, &mod->mod_replay_list,
 688                                          rq_mod_list) {
 689                         LASSERT(cur != LP_POISON);
 690                         LASSERT(cur->rq_type != LI_POISON);
 691                         DEBUG_REQ(D_HA, cur, "req balanced");
 692                         LASSERT(cur->rq_transno != 0);
 693                         LASSERT(cur->rq_import == req->rq_import);
 694
 695                         /* We no longer want to preserve this for transno-
 696                          * unconditional replay. */
 697                         spin_lock(&cur->rq_lock);
 698                         cur->rq_replay = 0;
 699                         spin_unlock(&cur->rq_lock);
 700                 }
 701         }
 702
 703         if (list_empty(&mod->mod_replay_list)) {
 704                 if (mod->mod_och != NULL)
 705                         mod->mod_och->och_mod = NULL;
 706
 707                 OBD_FREE_PTR(mod);
 708         }
 709 }
 710
 711 int mdc_set_open_replay_data(struct obd_export *exp,
 712                              struct obd_client_handle *och,
 713                              struct ptlrpc_request *open_req)
 714 {
 715         struct md_open_data   *mod;
 716         struct mdt_rec_create *rec;
 717         struct mdt_body       *body;
 718         struct obd_import     *imp = open_req->rq_import;
 719         ENTRY;
 720
 721         rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
 722         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
 723         LASSERT(rec != NULL);
 724         /* Incoming message in my byte order (it's been swabbed). */
 725         /* Outgoing messages always in my byte order. */
 726         LASSERT(body != NULL);
 727
 728         /*Only the import is replayable, we set replay_open data */
 729         if (och && imp->imp_replayable) {
 730                 OBD_ALLOC_PTR(mod);
 731                 if (mod == NULL) {
 732                         DEBUG_REQ(D_ERROR, open_req,
 733                                   "Can't allocate md_open_data");
 734                         RETURN(0);
 735                 }
 736                 CFS_INIT_LIST_HEAD(&mod->mod_replay_list);
 737
 738                 spin_lock(&open_req->rq_lock);
 739                 if (!open_req->rq_replay) {
 740                         OBD_FREE(mod, sizeof(*mod));
 741                         spin_unlock(&open_req->rq_lock);
 742                         RETURN(0);
 743                 }
 744
 745                 och->och_mod = mod;
 746                 mod->mod_och = och;
 747                 open_req->rq_cb_data = mod;
 748                 list_add_tail(&open_req->rq_mod_list, &mod->mod_replay_list);
 749                 open_req->rq_commit_cb = mdc_commit_delayed;
 750                 spin_unlock(&open_req->rq_lock);
 751         }
 752
 753         rec->cr_fid2 = body->fid1;
 754         rec->cr_ioepoch = body->ioepoch;
 755         rec->cr_old_handle.cookie = body->handle.cookie;
 756         open_req->rq_replay_cb = mdc_replay_open;
 757         if (!fid_is_sane(&body->fid1)) {
 758                 DEBUG_REQ(D_ERROR, open_req, "Saving replay request with "
 759                           "insane fid");
 760                 LBUG();
 761         }
 762
 763         DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
 764         RETURN(0);
 765 }
 766
 767 int mdc_clear_open_replay_data(struct obd_export *exp,
 768                                struct obd_client_handle *och)
 769 {
 770         struct md_open_data *mod = och->och_mod;
 771         ENTRY;
 772
 773         /*
 774          * Don't free the structure now (it happens in mdc_commit_delayed(),
 775          * after the last request is removed from its replay list),
 776          * but make sure that replay doesn't poke at the och, which is about to
 777          * be freed.
 778          */
 779         LASSERT(mod != LP_POISON);
 780         if (mod != NULL)
 781                 mod->mod_och = NULL;
 782
 783         och->och_mod = NULL;
 784         RETURN(0);
 785 }
 786
 787 int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 788               struct md_open_data *mod, struct ptlrpc_request **request)
 789 {
 790         struct obd_device     *obd = class_exp2obd(exp);
 791         struct ptlrpc_request *req;
 792         int                    rc;
 793         ENTRY;
 794
 795         *request = NULL;
 796         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_CLOSE);
 797         if (req == NULL)
 798                 RETURN(-ENOMEM);
 799
 800         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 801
 802         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
 803         if (rc) {
 804                 ptlrpc_request_free(req);
 805                 RETURN(rc);
 806         }
 807
 808         /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
 809          * portal whose threads are not taking any DLM locks and are therefore
 810          * always progressing */
 811         /* XXX FIXME bug 249 */
 812         req->rq_request_portal = MDS_READPAGE_PORTAL;
 813
 814         /* Ensure that this close's handle is fixed up during replay. */
 815         if (likely(mod != NULL))
 816                 list_add_tail(&req->rq_mod_list, &mod->mod_replay_list);
 817         else
 818                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 819
 820         mdc_close_pack(req, op_data);
 821
 822         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
 823                              obd->u.cli.cl_max_mds_easize);
 824         req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
 825                              obd->u.cli.cl_max_mds_cookiesize);
 826
 827         ptlrpc_request_set_replen(req);
 828
 829         req->rq_commit_cb = mdc_commit_delayed;
 830         req->rq_replay = 1;
 831         LASSERT(req->rq_cb_data == NULL);
 832         req->rq_cb_data = mod;
 833
 834         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 835         rc = ptlrpc_queue_wait(req);
 836         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 837
 838         if (req->rq_repmsg == NULL) {
 839                 CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
 840                        req->rq_status);
 841                 if (rc == 0)
 842                         rc = req->rq_status ?: -EIO;
 843         } else if (rc == 0 || rc == -EAGAIN) {
 844                 struct mdt_body *body;
 845
 846                 rc = lustre_msg_get_status(req->rq_repmsg);
 847                 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
 848                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
 849                                   "= %d", rc);
 850                         if (rc > 0)
 851                                 rc = -rc;
 852                 } else if (mod == NULL) {
 853                         if (req->rq_import->imp_replayable)
 854                                 CERROR("Unexpected: can't find md_open_data,"
 855                                        "but close succeeded with replayable imp"
 856                                        "Please tell CFS.\n");
 857                 }
 858
 859                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 860                 if (body == NULL)
 861                         rc = -EPROTO;
 862         }
 863
 864         EXIT;
 865         if (rc != 0 && rc != -EAGAIN && req && req->rq_commit_cb)
 866                 req->rq_commit_cb(req);
 867
 868         *request = req;
 869         return rc;
 870 }
 871
 872 int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 873                      struct md_open_data *mod)
 874 {
 875         struct obd_device     *obd = class_exp2obd(exp);
 876         struct ptlrpc_request *req;
 877         int                    rc;
 878         ENTRY;
 879
 880         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 881                                    &RQF_MDS_DONE_WRITING);
 882         if (req == NULL)
 883                 RETURN(-ENOMEM);
 884
 885         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 886         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_DONE_WRITING);
 887         if (rc) {
 888                 ptlrpc_request_free(req);
 889                 RETURN(rc);
 890         }
 891
 892         /* XXX: add DONE_WRITING request to och -- when Size-on-MDS
 893          * recovery will be ready. */
 894         mdc_close_pack(req, op_data);
 895         ptlrpc_request_set_replen(req);
 896         req->rq_replay = 1;
 897         req->rq_cb_data = mod;
 898         req->rq_commit_cb = mdc_commit_delayed;
 899         if (likely(mod != NULL))
 900                 list_add_tail(&req->rq_mod_list, &mod->mod_replay_list);
 901         else
 902                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 903
 904         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 905         rc = ptlrpc_queue_wait(req);
 906         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 907
 908         /* Close the open replay sequence if an error occured or no SOM
 909          * attribute update is needed. */
 910         if (rc != -EAGAIN)
 911                 ptlrpc_close_replay_seq(req);
 912
 913         if (rc && rc != -EAGAIN && req->rq_commit_cb)
 914                 req->rq_commit_cb(req);
 915
 916         ptlrpc_req_finished(req);
 917         RETURN(rc);
 918 }
 919
 920 #ifdef HAVE_SPLIT_SUPPORT
 921 int mdc_sendpage(struct obd_export *exp, const struct lu_fid *fid,
 922                  const struct page *page, int offset)
 923 {
 924         struct ptlrpc_request   *req;
 925         struct ptlrpc_bulk_desc *desc;
 926         int                      rc;
 927         ENTRY;
 928
 929         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_WRITEPAGE);
 930         if (req == NULL)
 931                 RETURN(-ENOMEM);
 932
 933         /* FIXME: capa doesn't support split yet */
 934         mdc_set_capa_size(req, &RMF_CAPA1, NULL);
 935
 936         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_WRITEPAGE);
 937         if (rc) {
 938                 ptlrpc_request_free(req);
 939                 RETURN(rc);
 940         }
 941
 942         req->rq_request_portal = MDS_READPAGE_PORTAL;
 943
 944         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_GET_SOURCE, MDS_BULK_PORTAL);
 945         if (desc == NULL)
 946                 GOTO(out, rc = -ENOMEM);
 947
 948         /* NB req now owns desc and will free it when it gets freed. */
 949         ptlrpc_prep_bulk_page(desc, (struct page *)page, 0, offset);
 950         mdc_readdir_pack(req, 0, offset, fid, NULL);
 951
 952         ptlrpc_request_set_replen(req);
 953         rc = ptlrpc_queue_wait(req);
 954         GOTO(out, rc);
 955 out:
 956         ptlrpc_req_finished(req);
 957         return rc;
 958 }
 959 EXPORT_SYMBOL(mdc_sendpage);
 960 #endif
 961
 962 int mdc_readpage(struct obd_export *exp, const struct lu_fid *fid,
 963                  struct obd_capa *oc, __u64 offset, struct page *page,
 964                  struct ptlrpc_request **request)
 965 {
 966         struct ptlrpc_request   *req;
 967         struct ptlrpc_bulk_desc *desc;
 968         int                      rc;
 969         ENTRY;
 970
 971         *request = NULL;
 972         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
 973         if (req == NULL)
 974                 RETURN(-ENOMEM);
 975
 976         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 977
 978         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
 979         if (rc) {
 980                 ptlrpc_request_free(req);
 981                 RETURN(rc);
 982         }
 983
 984         /* XXX FIXME bug 249 */
 985         req->rq_request_portal = MDS_READPAGE_PORTAL;
 986         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_PUT_SINK, MDS_BULK_PORTAL);
 987         if (desc == NULL) {
 988                 ptlrpc_request_free(req);
 989                 RETURN(-ENOMEM);
 990         }
 991
 992         /* NB req now owns desc and will free it when it gets freed */
 993         ptlrpc_prep_bulk_page(desc, page, 0, CFS_PAGE_SIZE);
 994         mdc_readdir_pack(req, offset, CFS_PAGE_SIZE, fid, oc);
 995
 996         ptlrpc_request_set_replen(req);
 997         rc = ptlrpc_queue_wait(req);
 998         if (rc) {
 999                 ptlrpc_req_finished(req);
1000                 RETURN(rc);
1001         }
1002
1003         if (req->rq_bulk->bd_nob_transferred != CFS_PAGE_SIZE) {
1004                 CERROR("Unexpected # bytes transferred: %d (%ld expected)\n",
1005                         req->rq_bulk->bd_nob_transferred, CFS_PAGE_SIZE);
1006                 ptlrpc_req_finished(req);
1007                 RETURN(-EPROTO);
1008         }
1009
1010         *request = req;
1011         RETURN(0);
1012 }
1013
1014 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1015                          void *karg, void *uarg)
1016 {
1017         struct obd_device *obd = exp->exp_obd;
1018         struct obd_ioctl_data *data = karg;
1019         struct obd_import *imp = obd->u.cli.cl_import;
1020         struct llog_ctxt *ctxt;
1021         int rc;
1022         ENTRY;
1023
1024         if (!try_module_get(THIS_MODULE)) {
1025                 CERROR("Can't get module. Is it alive?");
1026                 return -EINVAL;
1027         }
1028         switch (cmd) {
1029         case OBD_IOC_CLIENT_RECOVER:
1030                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1);
1031                 if (rc < 0)
1032                         GOTO(out, rc);
1033                 GOTO(out, rc = 0);
1034         case IOC_OSC_SET_ACTIVE:
1035                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
1036                 GOTO(out, rc);
1037         case OBD_IOC_PARSE: {
1038                 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
1039                 rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
1040                 GOTO(out, rc);
1041         }
1042 #ifdef __KERNEL__
1043         case OBD_IOC_LLOG_INFO:
1044         case OBD_IOC_LLOG_PRINT: {
1045                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1046                 rc = llog_ioctl(ctxt, cmd, data);
1047
1048                 GOTO(out, rc);
1049         }
1050 #endif
1051         case OBD_IOC_POLL_QUOTACHECK:
1052                 rc = lquota_poll_check(quota_interface, exp,
1053                                        (struct if_quotacheck *)karg);
1054                 GOTO(out, rc);
1055         default:
1056                 CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd);
1057                 GOTO(out, rc = -ENOTTY);
1058         }
1059 out:
1060         module_put(THIS_MODULE);
1061
1062         return rc;
1063 }
1064
1065 static int do_set_info_async(struct obd_export *exp,
1066                              obd_count keylen, void *key,
1067                              obd_count vallen, void *val,
1068                              struct ptlrpc_request_set *set)
1069 {
1070         struct obd_import     *imp = class_exp2cliimp(exp);
1071         struct ptlrpc_request *req;
1072         char                  *tmp;
1073         int                    rc;
1074         ENTRY;
1075
1076         if (vallen != sizeof(int))
1077                 RETURN(-EINVAL);
1078
1079         spin_lock(&imp->imp_lock);
1080         if (*((int *)val)) {
1081                 imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
1082                 imp->imp_connect_data.ocd_connect_flags |= OBD_CONNECT_RDONLY;
1083         } else {
1084                 imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
1085                 imp->imp_connect_data.ocd_connect_flags &= ~OBD_CONNECT_RDONLY;
1086         }
1087         spin_unlock(&imp->imp_lock);
1088
1089         req = ptlrpc_request_alloc(imp, &RQF_MDS_SET_INFO);
1090         if (req == NULL)
1091                 RETURN(-ENOMEM);
1092
1093         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
1094                              RCL_CLIENT, keylen);
1095         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
1096                              RCL_CLIENT, vallen);
1097         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SET_INFO);
1098         if (rc) {
1099                 ptlrpc_request_free(req);
1100                 RETURN(rc);
1101         }
1102
1103         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1104         memcpy(tmp, key, keylen);
1105         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1106         memcpy(tmp, val, vallen);
1107
1108         ptlrpc_request_set_replen(req);
1109
1110         if (set) {
1111                 ptlrpc_set_add_req(set, req);
1112                 ptlrpc_check_set(set);
1113         } else {
1114                 rc = ptlrpc_queue_wait(req);
1115                 ptlrpc_req_finished(req);
1116         }
1117
1118         RETURN(rc);
1119 }
1120
1121 int mdc_set_info_async(struct obd_export *exp,
1122                        obd_count keylen, void *key,
1123                        obd_count vallen, void *val,
1124                        struct ptlrpc_request_set *set)
1125 {
1126         struct obd_import *imp = class_exp2cliimp(exp);
1127         int                rc = -EINVAL;
1128         ENTRY;
1129
1130         if (KEY_IS(KEY_INIT_RECOV)) {
1131                 if (vallen != sizeof(int))
1132                         RETURN(-EINVAL);
1133                 spin_lock(&imp->imp_lock);
1134                 imp->imp_initial_recov = *(int *)val;
1135                 spin_unlock(&imp->imp_lock);
1136                 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
1137                        exp->exp_obd->obd_name, imp->imp_initial_recov);
1138                 RETURN(0);
1139         }
1140         /* Turn off initial_recov after we try all backup servers once */
1141         if (KEY_IS(KEY_INIT_RECOV_BACKUP)) {
1142                 if (vallen != sizeof(int))
1143                         RETURN(-EINVAL);
1144                 spin_lock(&imp->imp_lock);
1145                 imp->imp_initial_recov_bk = *(int *)val;
1146                 if (imp->imp_initial_recov_bk)
1147                         imp->imp_initial_recov = 1;
1148                 spin_unlock(&imp->imp_lock);
1149                 CDEBUG(D_HA, "%s: set imp_initial_recov_bk = %d\n",
1150                        exp->exp_obd->obd_name, imp->imp_initial_recov_bk);
1151                 RETURN(0);
1152         }
1153         if (KEY_IS(KEY_READ_ONLY)) {
1154                 rc = do_set_info_async(exp, keylen, key, vallen, val, set);
1155                 RETURN(rc);
1156         }
1157         if (KEY_IS(KEY_FLUSH_CTX)) {
1158                 sptlrpc_import_flush_my_ctx(imp);
1159                 RETURN(0);
1160         }
1161         if (KEY_IS(KEY_MDS_CONN)) {
1162                 struct obd_import *imp = class_exp2cliimp(exp);
1163
1164                 /* mds-mds import */
1165                 spin_lock(&imp->imp_lock);
1166                 imp->imp_server_timeout = 1;
1167                 spin_unlock(&imp->imp_lock);
1168                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1169                 CDEBUG(D_OTHER|D_WARNING, "%s: timeout / 2\n", exp->exp_obd->obd_name);
1170                 RETURN(0);
1171         }
1172
1173         RETURN(rc);
1174 }
1175
1176 int mdc_get_info(struct obd_export *exp, __u32 keylen, void *key,
1177                  __u32 *vallen, void *val)
1178 {
1179         int rc = -EINVAL;
1180
1181         if (KEY_IS(KEY_MAX_EASIZE)) {
1182                 int mdsize, *max_easize;
1183
1184                 if (*vallen != sizeof(int))
1185                         RETURN(-EINVAL);
1186                 mdsize = *(int*)val;
1187                 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
1188                         exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
1189                 max_easize = val;
1190                 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
1191                 RETURN(0);
1192         }
1193         if (KEY_IS(KEY_CONN_DATA)) {
1194                 struct obd_import *imp = class_exp2cliimp(exp);
1195                 struct obd_connect_data *data = val;
1196
1197                 if (*vallen != sizeof(*data))
1198                         RETURN(-EINVAL);
1199
1200                 *data = imp->imp_connect_data;
1201                 RETURN(0);
1202         }
1203
1204         RETURN(rc);
1205 }
1206
1207 static int mdc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1208                       __u64 max_age)
1209 {
1210         struct ptlrpc_request *req;
1211         struct obd_statfs     *msfs;
1212         int                    rc;
1213         ENTRY;
1214
1215         req = ptlrpc_request_alloc_pack(obd->u.cli.cl_import, &RQF_MDS_STATFS,
1216                                         LUSTRE_MDS_VERSION, MDS_STATFS);
1217         if (req == NULL)
1218                 RETURN(-ENOMEM);
1219
1220         ptlrpc_request_set_replen(req);
1221
1222         rc = ptlrpc_queue_wait(req);
1223         if (rc) {
1224                 /* check connection error first */
1225                 if (obd->u.cli.cl_import->imp_connect_error)
1226                         rc = obd->u.cli.cl_import->imp_connect_error;
1227                 GOTO(out, rc);
1228         }
1229
1230         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1231         if (msfs == NULL)
1232                 GOTO(out, rc = -EPROTO);
1233
1234         *osfs = *msfs;
1235         EXIT;
1236 out:
1237         ptlrpc_req_finished(req);
1238         return rc;
1239 }
1240
1241 static int mdc_pin(struct obd_export *exp, const struct lu_fid *fid,
1242                    struct obd_capa *oc, struct obd_client_handle *handle,
1243                    int flags)
1244 {
1245         struct ptlrpc_request *req;
1246         struct mdt_body       *body;
1247         int                    rc;
1248         ENTRY;
1249
1250         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_PIN);
1251         if (req == NULL)
1252                 RETURN(-ENOMEM);
1253
1254         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1255
1256         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_PIN);
1257         if (rc) {
1258                 ptlrpc_request_free(req);
1259                 RETURN(rc);
1260         }
1261
1262         mdc_pack_body(req, fid, oc, 0, 0, -1, flags);
1263
1264         ptlrpc_request_set_replen(req);
1265
1266         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1267         rc = ptlrpc_queue_wait(req);
1268         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1269         if (rc) {
1270                 CERROR("Pin failed: %d\n", rc);
1271                 GOTO(err_out, rc);
1272         }
1273
1274         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1275         if (body == NULL)
1276                 GOTO(err_out, rc = -EPROTO);
1277
1278         handle->och_fh = body->handle;
1279         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
1280
1281         OBD_ALLOC_PTR(handle->och_mod);
1282         if (handle->och_mod == NULL) {
1283                 DEBUG_REQ(D_ERROR, req, "can't allocate mdc_open_data");
1284                 GOTO(err_out, rc = -ENOMEM);
1285         }
1286         /* will be dropped by unpin */
1287         CFS_INIT_LIST_HEAD(&handle->och_mod->mod_replay_list);
1288         list_add_tail(&req->rq_mod_list, &handle->och_mod->mod_replay_list);
1289
1290         RETURN(0);
1291
1292 err_out:
1293         ptlrpc_req_finished(req);
1294         RETURN(rc);
1295 }
1296
1297 static int mdc_unpin(struct obd_export *exp, struct obd_client_handle *handle,
1298                      int flag)
1299 {
1300         struct ptlrpc_request *req;
1301         struct mdt_body       *body;
1302         int                    rc;
1303         ENTRY;
1304
1305         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_UNPIN,
1306                                         LUSTRE_MDS_VERSION, MDS_UNPIN);
1307         if (req == NULL)
1308                 RETURN(-ENOMEM);
1309
1310         body = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY);
1311         body->handle = handle->och_fh;
1312         body->flags = flag;
1313
1314         ptlrpc_request_set_replen(req);
1315
1316         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1317         rc = ptlrpc_queue_wait(req);
1318         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1319
1320         if (rc != 0)
1321                 CERROR("Unpin failed: %d\n", rc);
1322
1323         ptlrpc_req_finished(req);
1324
1325         LASSERT(!list_empty(&handle->och_mod->mod_replay_list));
1326         req = list_entry(handle->och_mod->mod_replay_list.next,
1327                          typeof(*req), rq_mod_list);
1328         list_del_init(&req->rq_mod_list);
1329         ptlrpc_req_finished(req);
1330         LASSERT(list_empty(&handle->och_mod->mod_replay_list));
1331
1332         OBD_FREE(handle->och_mod, sizeof(*handle->och_mod));
1333         RETURN(rc);
1334 }
1335
1336 int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
1337              struct obd_capa *oc, struct ptlrpc_request **request)
1338 {
1339         struct ptlrpc_request *req;
1340         int                    rc;
1341         ENTRY;
1342
1343         *request = NULL;
1344         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
1345         if (req == NULL)
1346                 RETURN(-ENOMEM);
1347
1348         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1349
1350         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
1351         if (rc) {
1352                 ptlrpc_request_free(req);
1353                 RETURN(rc);
1354         }
1355
1356         mdc_pack_body(req, fid, oc, 0, 0, -1, 0);
1357
1358         ptlrpc_request_set_replen(req);
1359
1360         rc = ptlrpc_queue_wait(req);
1361         if (rc)
1362                 ptlrpc_req_finished(req);
1363         else
1364                 *request = req;
1365         RETURN(rc);
1366 }
1367
1368 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
1369                             enum obd_import_event event)
1370 {
1371         int rc = 0;
1372
1373         LASSERT(imp->imp_obd == obd);
1374
1375         switch (event) {
1376         case IMP_EVENT_DISCON: {
1377 #if 0
1378                 /* XXX Pass event up to OBDs stack. used only for FLD now */
1379                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
1380 #endif
1381                 break;
1382         }
1383         case IMP_EVENT_INACTIVE: {
1384                 struct client_obd *cli = &obd->u.cli;
1385                 /*
1386                  * Flush current sequence to make client obtain new one
1387                  * from server in case of disconnect/reconnect.
1388                  * If range is already empty then no need to flush it.
1389                  */
1390                 if (cli->cl_seq != NULL &&
1391                     !range_is_exhausted(&cli->cl_seq->lcs_space)) {
1392                         seq_client_flush(cli->cl_seq);
1393                 }
1394
1395                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
1396                 break;
1397         }
1398         case IMP_EVENT_INVALIDATE: {
1399                 struct ldlm_namespace *ns = obd->obd_namespace;
1400
1401                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
1402
1403                 break;
1404         }
1405         case IMP_EVENT_ACTIVE: {
1406                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
1407                 break;
1408         }
1409         case IMP_EVENT_OCD:
1410                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
1411                 break;
1412
1413         default:
1414                 CERROR("Unknown import event %x\n", event);
1415                 LBUG();
1416         }
1417         RETURN(rc);
1418 }
1419
1420 static int mdc_fid_init(struct obd_export *exp)
1421 {
1422         struct client_obd *cli = &exp->exp_obd->u.cli;
1423         char *prefix;
1424         int rc;
1425         ENTRY;
1426
1427         OBD_ALLOC_PTR(cli->cl_seq);
1428         if (cli->cl_seq == NULL)
1429                 RETURN(-ENOMEM);
1430
1431         OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
1432         if (prefix == NULL)
1433                 GOTO(out_free_seq, rc = -ENOMEM);
1434
1435         snprintf(prefix, MAX_OBD_NAME + 5, "srv-%s",
1436                  exp->exp_obd->obd_name);
1437
1438         /* Init client side sequence-manager */
1439         rc = seq_client_init(cli->cl_seq, exp,
1440                              LUSTRE_SEQ_METADATA,
1441                              prefix, NULL);
1442         OBD_FREE(prefix, MAX_OBD_NAME + 5);
1443         if (rc)
1444                 GOTO(out_free_seq, rc);
1445
1446         RETURN(rc);
1447 out_free_seq:
1448         OBD_FREE_PTR(cli->cl_seq);
1449         cli->cl_seq = NULL;
1450         return rc;
1451 }
1452
1453 static int mdc_fid_fini(struct obd_export *exp)
1454 {
1455         struct client_obd *cli = &exp->exp_obd->u.cli;
1456         ENTRY;
1457
1458         if (cli->cl_seq != NULL) {
1459                 seq_client_fini(cli->cl_seq);
1460                 OBD_FREE_PTR(cli->cl_seq);
1461                 cli->cl_seq = NULL;
1462         }
1463
1464         RETURN(0);
1465 }
1466
1467 int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1468                   struct md_op_data *op_data)
1469 {
1470         struct client_obd *cli = &exp->exp_obd->u.cli;
1471         struct lu_client_seq *seq = cli->cl_seq;
1472         ENTRY;
1473         RETURN(seq_client_alloc_fid(seq, fid));
1474 }
1475
1476 /* XXX This method is used only to clear current fid seq
1477  * once fld/mds insert failed */
1478 static int mdc_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
1479 {
1480         struct client_obd *cli = &exp->exp_obd->u.cli;
1481
1482         seq_client_flush(cli->cl_seq);
1483         return 0;
1484 }
1485
1486 static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
1487 {
1488         struct client_obd *cli = &obd->u.cli;
1489         struct lprocfs_static_vars lvars = { 0 };
1490         int rc;
1491         ENTRY;
1492
1493         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1494         if (!cli->cl_rpc_lock)
1495                 RETURN(-ENOMEM);
1496         mdc_init_rpc_lock(cli->cl_rpc_lock);
1497
1498         ptlrpcd_addref();
1499
1500         OBD_ALLOC(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1501         if (!cli->cl_setattr_lock)
1502                 GOTO(err_rpc_lock, rc = -ENOMEM);
1503         mdc_init_rpc_lock(cli->cl_setattr_lock);
1504
1505         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1506         if (!cli->cl_close_lock)
1507                 GOTO(err_setattr_lock, rc = -ENOMEM);
1508         mdc_init_rpc_lock(cli->cl_close_lock);
1509
1510         rc = client_obd_setup(obd, cfg);
1511         if (rc)
1512                 GOTO(err_close_lock, rc);
1513         lprocfs_mdc_init_vars(&lvars);
1514         lprocfs_obd_setup(obd, lvars.obd_vars);
1515         sptlrpc_lprocfs_cliobd_attach(obd);
1516         ptlrpc_lprocfs_register_obd(obd);
1517
1518         rc = obd_llog_init(obd, NULL, obd, 0, NULL, NULL);
1519         if (rc) {
1520                 mdc_cleanup(obd);
1521                 CERROR("failed to setup llogging subsystems\n");
1522         }
1523
1524         RETURN(rc);
1525
1526 err_close_lock:
1527         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1528 err_setattr_lock:
1529         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1530 err_rpc_lock:
1531         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1532         ptlrpcd_decref();
1533         RETURN(rc);
1534 }
1535
1536 /* Initialize the default and maximum LOV EA and cookie sizes.  This allows
1537  * us to make MDS RPCs with large enough reply buffers to hold the
1538  * maximum-sized (= maximum striped) EA and cookie without having to
1539  * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
1540 int mdc_init_ea_size(struct obd_export *exp, int easize,
1541                      int def_easize, int cookiesize)
1542 {
1543         struct obd_device *obd = exp->exp_obd;
1544         struct client_obd *cli = &obd->u.cli;
1545         ENTRY;
1546
1547         if (cli->cl_max_mds_easize < easize)
1548                 cli->cl_max_mds_easize = easize;
1549
1550         if (cli->cl_default_mds_easize < def_easize)
1551                 cli->cl_default_mds_easize = def_easize;
1552
1553         if (cli->cl_max_mds_cookiesize < cookiesize)
1554                 cli->cl_max_mds_cookiesize = cookiesize;
1555
1556         RETURN(0);
1557 }
1558
1559 static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
1560 {
1561         int rc = 0;
1562         ENTRY;
1563
1564         switch (stage) {
1565         case OBD_CLEANUP_EARLY:
1566         case OBD_CLEANUP_EXPORTS:
1567                 /* If we set up but never connected, the
1568                    client import will not have been cleaned. */
1569                 if (obd->u.cli.cl_import) {
1570                         struct obd_import *imp;
1571                         imp = obd->u.cli.cl_import;
1572                         CERROR("client import never connected\n");
1573                         ptlrpc_invalidate_import(imp);
1574                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
1575                         class_destroy_import(imp);
1576                         obd->u.cli.cl_import = NULL;
1577                 }
1578                 break;
1579         case OBD_CLEANUP_SELF_EXP:
1580                 rc = obd_llog_finish(obd, 0);
1581                 if (rc != 0)
1582                         CERROR("failed to cleanup llogging subsystems\n");
1583         case OBD_CLEANUP_OBD:
1584                 break;
1585         }
1586         RETURN(rc);
1587 }
1588
1589 static int mdc_cleanup(struct obd_device *obd)
1590 {
1591         struct client_obd *cli = &obd->u.cli;
1592
1593         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1594         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1595         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1596
1597         ptlrpc_lprocfs_unregister_obd(obd);
1598         lprocfs_obd_cleanup(obd);
1599         ptlrpcd_decref();
1600
1601         return client_obd_cleanup(obd);
1602 }
1603
1604
1605 static int mdc_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
1606                          struct obd_device *tgt, int count,
1607                          struct llog_catid *logid, struct obd_uuid *uuid)
1608 {
1609         struct llog_ctxt *ctxt;
1610         int rc;
1611         ENTRY;
1612
1613         rc = llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
1614                         &llog_client_ops);
1615         if (rc == 0) {
1616                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1617                 ctxt->loc_imp = obd->u.cli.cl_import;
1618         }
1619
1620         rc = llog_setup(obd, llogs, LLOG_LOVEA_REPL_CTXT, tgt, 0, NULL,
1621                        &llog_client_ops);
1622         if (rc == 0) {
1623                 ctxt = llog_get_context(obd, LLOG_LOVEA_REPL_CTXT);
1624                 ctxt->loc_imp = obd->u.cli.cl_import;
1625         }
1626
1627         RETURN(rc);
1628 }
1629
1630 static int mdc_llog_finish(struct obd_device *obd, int count)
1631 {
1632         int rc;
1633         ENTRY;
1634
1635         rc = llog_cleanup(llog_get_context(obd, LLOG_LOVEA_REPL_CTXT));
1636         if (rc) {
1637                 CERROR("can not cleanup LLOG_CONFIG_REPL_CTXT rc %d\n", rc);
1638         }
1639         rc = llog_cleanup(llog_get_context(obd, LLOG_CONFIG_REPL_CTXT));
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         *request = NULL;
1674         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
1675         if (req == NULL)
1676                 RETURN(-ENOMEM);
1677
1678         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1679
1680         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
1681         if (rc) {
1682                 ptlrpc_request_free(req);
1683                 RETURN(rc);
1684         }
1685
1686         mdc_pack_body(req, fid, oc, OBD_MD_FLRMTPERM, 0, suppgid, 0);
1687
1688         ptlrpc_request_set_replen(req);
1689
1690         rc = ptlrpc_queue_wait(req);
1691         if (rc)
1692                 ptlrpc_req_finished(req);
1693         else
1694                 *request = req;
1695         RETURN(rc);
1696 }
1697
1698 static int mdc_interpret_renew_capa(struct ptlrpc_request *req, void *unused,
1699                                     int status)
1700 {
1701         struct obd_capa *oc = req->rq_async_args.pointer_arg[0];
1702         renew_capa_cb_t cb = req->rq_async_args.pointer_arg[1];
1703         struct mdt_body *body = NULL;
1704         struct lustre_capa *capa;
1705         ENTRY;
1706
1707         if (status)
1708                 GOTO(out, capa = ERR_PTR(status));
1709
1710         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1711         if (body == NULL)
1712                 GOTO(out, capa = ERR_PTR(-EFAULT));
1713
1714         if ((body->valid & OBD_MD_FLOSSCAPA) == 0)
1715                 GOTO(out, capa = ERR_PTR(-ENOENT));
1716
1717         capa = req_capsule_server_get(&req->rq_pill, &RMF_CAPA2);
1718         if (!capa)
1719                 GOTO(out, capa = ERR_PTR(-EFAULT));
1720         EXIT;
1721 out:
1722         cb(oc, capa);
1723         return 0;
1724 }
1725
1726 static int mdc_renew_capa(struct obd_export *exp, struct obd_capa *oc,
1727                           renew_capa_cb_t cb)
1728 {
1729         struct ptlrpc_request *req;
1730         ENTRY;
1731
1732         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_GETATTR,
1733                                         LUSTRE_MDS_VERSION, MDS_GETATTR);
1734         if (req == NULL)
1735                 RETURN(-ENOMEM);
1736
1737         /* NB, OBD_MD_FLOSSCAPA is set here, but it doesn't necessarily mean the
1738          * capa to renew is oss capa.
1739          */
1740         mdc_pack_body(req, &oc->c_capa.lc_fid, oc, OBD_MD_FLOSSCAPA, 0, -1, 0);
1741         ptlrpc_request_set_replen(req);
1742
1743         req->rq_async_args.pointer_arg[0] = oc;
1744         req->rq_async_args.pointer_arg[1] = cb;
1745         req->rq_interpret_reply = mdc_interpret_renew_capa;
1746         ptlrpcd_add_req(req);
1747         RETURN(0);
1748 }
1749
1750 static int mdc_connect(const struct lu_env *env,
1751                        struct lustre_handle *dlm_handle,
1752                        struct obd_device *obd, struct obd_uuid *cluuid,
1753                        struct obd_connect_data *data)
1754 {
1755         struct obd_import *imp = obd->u.cli.cl_import;
1756
1757         /* mds-mds import features */
1758         if (data && (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS)) {
1759                 spin_lock(&imp->imp_lock);
1760                 imp->imp_server_timeout = 1;
1761                 spin_unlock(&imp->imp_lock);
1762                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1763                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
1764                        obd->obd_name);
1765         }
1766
1767         return client_connect_import(env, dlm_handle, obd, cluuid, data);
1768 }
1769
1770 struct obd_ops mdc_obd_ops = {
1771         .o_owner            = THIS_MODULE,
1772         .o_setup            = mdc_setup,
1773         .o_precleanup       = mdc_precleanup,
1774         .o_cleanup          = mdc_cleanup,
1775         .o_add_conn         = client_import_add_conn,
1776         .o_del_conn         = client_import_del_conn,
1777         .o_connect          = mdc_connect,
1778         .o_disconnect       = client_disconnect_export,
1779         .o_iocontrol        = mdc_iocontrol,
1780         .o_set_info_async   = mdc_set_info_async,
1781         .o_statfs           = mdc_statfs,
1782         .o_pin              = mdc_pin,
1783         .o_unpin            = mdc_unpin,
1784         .o_fid_init         = mdc_fid_init,
1785         .o_fid_fini         = mdc_fid_fini,
1786         .o_fid_alloc        = mdc_fid_alloc,
1787         .o_fid_delete       = mdc_fid_delete,
1788         .o_import_event     = mdc_import_event,
1789         .o_llog_init        = mdc_llog_init,
1790         .o_llog_finish      = mdc_llog_finish,
1791         .o_get_info         = mdc_get_info,
1792         .o_process_config  = mdc_process_config,
1793 };
1794
1795 struct md_ops mdc_md_ops = {
1796         .m_getstatus        = mdc_getstatus,
1797         .m_change_cbdata    = mdc_change_cbdata,
1798         .m_close            = mdc_close,
1799         .m_create           = mdc_create,
1800         .m_done_writing     = mdc_done_writing,
1801         .m_enqueue          = mdc_enqueue,
1802         .m_getattr          = mdc_getattr,
1803         .m_getattr_name     = mdc_getattr_name,
1804         .m_intent_lock      = mdc_intent_lock,
1805         .m_link             = mdc_link,
1806         .m_is_subdir        = mdc_is_subdir,
1807         .m_rename           = mdc_rename,
1808         .m_setattr          = mdc_setattr,
1809         .m_setxattr         = mdc_setxattr,
1810         .m_getxattr         = mdc_getxattr,
1811         .m_sync             = mdc_sync,
1812         .m_readpage         = mdc_readpage,
1813         .m_unlink           = mdc_unlink,
1814         .m_cancel_unused    = mdc_cancel_unused,
1815         .m_init_ea_size     = mdc_init_ea_size,
1816         .m_set_lock_data    = mdc_set_lock_data,
1817         .m_lock_match       = mdc_lock_match,
1818         .m_get_lustre_md    = mdc_get_lustre_md,
1819         .m_free_lustre_md   = mdc_free_lustre_md,
1820         .m_set_open_replay_data = mdc_set_open_replay_data,
1821         .m_clear_open_replay_data = mdc_clear_open_replay_data,
1822         .m_get_remote_perm  = mdc_get_remote_perm,
1823         .m_renew_capa       = mdc_renew_capa
1824 };
1825
1826 extern quota_interface_t mdc_quota_interface;
1827
1828 int __init mdc_init(void)
1829 {
1830         int rc;
1831         struct lprocfs_static_vars lvars = { 0 };
1832         lprocfs_mdc_init_vars(&lvars);
1833
1834         request_module("lquota");
1835         quota_interface = PORTAL_SYMBOL_GET(mdc_quota_interface);
1836         init_obd_quota_ops(quota_interface, &mdc_obd_ops);
1837
1838         rc = class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
1839                                  LUSTRE_MDC_NAME, NULL);
1840         if (rc && quota_interface)
1841                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1842
1843         RETURN(rc);
1844 }
1845
1846 #ifdef __KERNEL__
1847 static void /*__exit*/ mdc_exit(void)
1848 {
1849         if (quota_interface)
1850                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1851
1852         class_unregister_type(LUSTRE_MDC_NAME);
1853 }
1854
1855 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1856 MODULE_DESCRIPTION("Lustre Metadata Client");
1857 MODULE_LICENSE("GPL");
1858
1859 module_init(mdc_init);
1860 module_exit(mdc_exit);
1861 #endif