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  * will contain 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 aware 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_suppgid2 = -1;
 368                 rec->sx_fid    = *fid;
 369                 rec->sx_valid  = valid | OBD_MD_FLCTIME;
 370                 rec->sx_time   = cfs_time_current_sec();
 371                 rec->sx_size   = output_size;
 372                 rec->sx_flags  = flags;
 373
 374                 mdc_pack_capa(req, &RMF_CAPA1, oc);
 375         } else {
 376                 mdc_pack_body(req, fid, oc, valid, output_size, suppgid, flags);
 377         }
 378
 379         if (xattr_name) {
 380                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 381                 memcpy(tmp, xattr_name, xattr_namelen);
 382         }
 383         if (input_size) {
 384                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
 385                 memcpy(tmp, input, input_size);
 386         }
 387
 388         if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
 389                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
 390                                      RCL_SERVER, output_size);
 391         ptlrpc_request_set_replen(req);
 392
 393         /* make rpc */
 394         if (opcode == MDS_REINT)
 395                 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 396
 397         rc = ptlrpc_queue_wait(req);
 398
 399         if (opcode == MDS_REINT)
 400                 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 401
 402         if (rc)
 403                 ptlrpc_req_finished(req);
 404         else
 405                 *request = req;
 406         RETURN(rc);
 407 }
 408
 409 int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
 410                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 411                  const char *input, int input_size, int output_size,
 412                  int flags, __u32 suppgid, struct ptlrpc_request **request)
 413 {
 414         return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
 415                                 fid, oc, MDS_REINT, valid, xattr_name,
 416                                 input, input_size, output_size, flags,
 417                                 suppgid, request);
 418 }
 419
 420 int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
 421                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 422                  const char *input, int input_size, int output_size,
 423                  int flags, struct ptlrpc_request **request)
 424 {
 425         return mdc_xattr_common(exp, &RQF_MDS_GETXATTR,
 426                                 fid, oc, MDS_GETXATTR, valid, xattr_name,
 427                                 input, input_size, output_size, flags,
 428                                 -1, request);
 429 }
 430
 431 #ifdef CONFIG_FS_POSIX_ACL
 432 static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
 433 {
 434         struct req_capsule     *pill = &req->rq_pill;
 435         struct mdt_body        *body = md->body;
 436         struct posix_acl       *acl;
 437         void                   *buf;
 438         int                     rc;
 439         ENTRY;
 440
 441         if (!body->aclsize)
 442                 RETURN(0);
 443
 444         buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->aclsize);
 445
 446         if (!buf)
 447                 RETURN(-EPROTO);
 448
 449         acl = posix_acl_from_xattr(buf, body->aclsize);
 450         if (IS_ERR(acl)) {
 451                 rc = PTR_ERR(acl);
 452                 CERROR("convert xattr to acl: %d\n", rc);
 453                 RETURN(rc);
 454         }
 455
 456         rc = posix_acl_valid(acl);
 457         if (rc) {
 458                 CERROR("validate acl: %d\n", rc);
 459                 posix_acl_release(acl);
 460                 RETURN(rc);
 461         }
 462
 463         md->posix_acl = acl;
 464         RETURN(0);
 465 }
 466 #else
 467 #define mdc_unpack_acl(req, md) 0
 468 #endif
 469
 470 int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
 471                       struct obd_export *dt_exp, struct obd_export *md_exp,
 472                       struct lustre_md *md)
 473 {
 474         struct req_capsule *pill = &req->rq_pill;
 475         int rc;
 476         ENTRY;
 477
 478         LASSERT(md);
 479         memset(md, 0, sizeof(*md));
 480
 481         md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 482         LASSERT(md->body != NULL);
 483
 484         if (md->body->valid & OBD_MD_FLEASIZE) {
 485                 int lmmsize;
 486                 struct lov_mds_md *lmm;
 487
 488                 if (!S_ISREG(md->body->mode)) {
 489                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, should be a "
 490                                "regular file, but is not\n");
 491                         GOTO(out, rc = -EPROTO);
 492                 }
 493
 494                 if (md->body->eadatasize == 0) {
 495                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, "
 496                                "but eadatasize 0\n");
 497                         GOTO(out, rc = -EPROTO);
 498                 }
 499                 lmmsize = md->body->eadatasize;
 500                 lmm = req_capsule_server_sized_get(pill, &RMF_MDT_MD, lmmsize);
 501                 if (!lmm)
 502                         GOTO(out, rc = -EPROTO);
 503
 504                 rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize);
 505                 if (rc < 0)
 506                         GOTO(out, rc);
 507
 508                 if (rc < sizeof(*md->lsm)) {
 509                         CDEBUG(D_INFO, "lsm size too small: "
 510                                "rc < sizeof (*md->lsm) (%d < %d)\n",
 511                                rc, (int)sizeof(*md->lsm));
 512                         GOTO(out, rc = -EPROTO);
 513                 }
 514
 515         } else if (md->body->valid & OBD_MD_FLDIREA) {
 516                 int lmvsize;
 517                 struct lov_mds_md *lmv;
 518
 519                 if(!S_ISDIR(md->body->mode)) {
 520                         CDEBUG(D_INFO, "OBD_MD_FLDIREA set, should be a "
 521                                "directory, but is not\n");
 522                         GOTO(out, rc = -EPROTO);
 523                 }
 524
 525                 if (md->body->eadatasize == 0) {
 526                         CDEBUG(D_INFO, "OBD_MD_FLDIREA is set, "
 527                                "but eadatasize 0\n");
 528                         RETURN(-EPROTO);
 529                 }
 530                 if (md->body->valid & OBD_MD_MEA) {
 531                         lmvsize = md->body->eadatasize;
 532                         lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 533                                                            lmvsize);
 534                         if (!lmv)
 535                                 GOTO(out, rc = -EPROTO);
 536
 537                         rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
 538                                           lmvsize);
 539                         if (rc < 0)
 540                                 GOTO(out, rc);
 541
 542                         if (rc < sizeof(*md->mea)) {
 543                                 CDEBUG(D_INFO, "size too small:  "
 544                                        "rc < sizeof(*md->mea) (%d < %d)\n",
 545                                         rc, sizeof(*md->mea));
 546                                 GOTO(out, rc = -EPROTO);
 547                         }
 548                 }
 549         }
 550         rc = 0;
 551
 552         if (md->body->valid & OBD_MD_FLRMTPERM) {
 553                 /* remote permission */
 554                 LASSERT(client_is_remote(exp));
 555                 md->remote_perm = req_capsule_server_swab_get(pill, &RMF_ACL,
 556                                                 lustre_swab_mdt_remote_perm);
 557                 if (!md->remote_perm)
 558                         GOTO(out, rc = -EPROTO);
 559         }
 560         else if (md->body->valid & OBD_MD_FLACL) {
 561                 /* for ACL, it's possible that FLACL is set but aclsize is zero.
 562                  * only when aclsize != 0 there's an actual segment for ACL
 563                  * in reply buffer.
 564                  */
 565                 if (md->body->aclsize) {
 566                         rc = mdc_unpack_acl(req, md);
 567                         if (rc)
 568                                 GOTO(out, rc);
 569 #ifdef CONFIG_FS_POSIX_ACL
 570                 } else {
 571                         md->posix_acl = NULL;
 572 #endif
 573                 }
 574         }
 575         if (md->body->valid & OBD_MD_FLMDSCAPA) {
 576                 struct obd_capa *oc = mdc_unpack_capa(req, &RMF_CAPA1);
 577
 578                 if (IS_ERR(oc))
 579                         GOTO(out, rc = PTR_ERR(oc));
 580                 md->mds_capa = oc;
 581         }
 582
 583         if (md->body->valid & OBD_MD_FLOSSCAPA) {
 584                 struct obd_capa *oc = mdc_unpack_capa(req, &RMF_CAPA2);
 585
 586                 if (IS_ERR(oc))
 587                         GOTO(out, rc = PTR_ERR(oc));
 588                 md->oss_capa = oc;
 589         }
 590
 591         EXIT;
 592 out:
 593         if (rc) {
 594                 if (md->oss_capa)
 595                         free_capa(md->oss_capa);
 596                 if (md->mds_capa)
 597                         free_capa(md->mds_capa);
 598 #ifdef CONFIG_FS_POSIX_ACL
 599                 posix_acl_release(md->posix_acl);
 600 #endif
 601                 if (md->lsm)
 602                         obd_free_memmd(dt_exp, &md->lsm);
 603         }
 604         return rc;
 605 }
 606
 607 int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
 608 {
 609         ENTRY;
 610         RETURN(0);
 611 }
 612
 613 static void mdc_replay_open(struct ptlrpc_request *req)
 614 {
 615         struct md_open_data *mod = req->rq_cb_data;
 616         struct ptlrpc_request *cur, *tmp;
 617         struct obd_client_handle *och;
 618         struct lustre_handle old;
 619         struct mdt_body *body;
 620         ENTRY;
 621
 622         if (mod == NULL) {
 623                 DEBUG_REQ(D_ERROR, req,
 624                           "Can't properly replay without open data.");
 625                 EXIT;
 626                 return;
 627         }
 628
 629         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 630         LASSERT(body != NULL);
 631
 632         och = mod->mod_och;
 633         if (och != NULL) {
 634                 struct lustre_handle *file_fh;
 635
 636                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 637
 638                 file_fh = &och->och_fh;
 639                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 640                        file_fh->cookie, body->handle.cookie);
 641                 old = *file_fh;
 642                 *file_fh = body->handle;
 643         }
 644         list_for_each_entry_safe(cur, tmp, &mod->mod_replay_list, rq_mod_list) {
 645                 int opc = lustre_msg_get_opc(cur->rq_reqmsg);
 646                 struct mdt_epoch *epoch = NULL;
 647
 648                 if (opc == MDS_CLOSE || opc == MDS_DONE_WRITING) {
 649                         epoch = req_capsule_client_get(&cur->rq_pill,
 650                                                &RMF_MDT_EPOCH);
 651                         LASSERT(epoch);
 652                         DEBUG_REQ(D_HA, cur, "updating %s body with new fh",
 653                                   opc == MDS_CLOSE ? "CLOSE" : "DONE_WRITING");
 654                 } else if (opc == MDS_REINT) {
 655                         struct mdt_rec_setattr *rec;
 656
 657                         /* Check this is REINT_SETATTR. */
 658                         rec = req_capsule_client_get(&cur->rq_pill,
 659                                                &RMF_REC_REINT);
 660                         LASSERT(rec && rec->sa_opcode == REINT_SETATTR);
 661
 662                         epoch = req_capsule_client_get(&cur->rq_pill,
 663                                                &RMF_MDT_EPOCH);
 664                         LASSERT(epoch);
 665                         DEBUG_REQ(D_HA, cur, "updating REINT_SETATTR body "
 666                                   "with new fh");
 667                 }
 668                 if (epoch) {
 669                         if (och != NULL)
 670                                 LASSERT(!memcmp(&old, &epoch->handle,
 671                                                 sizeof(old)));
 672                         epoch->handle = body->handle;
 673                 }
 674         }
 675         EXIT;
 676 }
 677
 678 void mdc_commit_delayed(struct ptlrpc_request *req)
 679 {
 680         struct md_open_data *mod = req->rq_cb_data;
 681         struct ptlrpc_request *cur, *tmp;
 682
 683         DEBUG_REQ(D_HA, req, "req committed");
 684
 685         if (mod == NULL)
 686                 return;
 687
 688         req->rq_cb_data = NULL;
 689         req->rq_commit_cb = NULL;
 690         list_del_init(&req->rq_mod_list);
 691         if (req->rq_sequence) {
 692                 list_for_each_entry_safe(cur, tmp, &mod->mod_replay_list,
 693                                          rq_mod_list) {
 694                         LASSERT(cur != LP_POISON);
 695                         LASSERT(cur->rq_type != LI_POISON);
 696                         DEBUG_REQ(D_HA, cur, "req balanced");
 697                         LASSERT(cur->rq_transno != 0);
 698                         LASSERT(cur->rq_import == req->rq_import);
 699
 700                         /* We no longer want to preserve this for transno-
 701                          * unconditional replay. */
 702                         spin_lock(&cur->rq_lock);
 703                         cur->rq_replay = 0;
 704                         spin_unlock(&cur->rq_lock);
 705                 }
 706         }
 707
 708         if (list_empty(&mod->mod_replay_list)) {
 709                 if (mod->mod_och != NULL)
 710                         mod->mod_och->och_mod = NULL;
 711
 712                 OBD_FREE_PTR(mod);
 713         }
 714 }
 715
 716 int mdc_set_open_replay_data(struct obd_export *exp,
 717                              struct obd_client_handle *och,
 718                              struct ptlrpc_request *open_req)
 719 {
 720         struct md_open_data   *mod;
 721         struct mdt_rec_create *rec;
 722         struct mdt_body       *body;
 723         struct obd_import     *imp = open_req->rq_import;
 724         ENTRY;
 725
 726         if (!open_req->rq_replay)
 727                 RETURN(0);
 728
 729         rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
 730         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
 731         LASSERT(rec != NULL);
 732         /* Incoming message in my byte order (it's been swabbed). */
 733         /* Outgoing messages always in my byte order. */
 734         LASSERT(body != NULL);
 735
 736         /* Only if the import is replayable, we set replay_open data */
 737         if (och && imp->imp_replayable) {
 738                 OBD_ALLOC_PTR(mod);
 739                 if (mod == NULL) {
 740                         DEBUG_REQ(D_ERROR, open_req,
 741                                   "Can't allocate md_open_data");
 742                         RETURN(0);
 743                 }
 744                 CFS_INIT_LIST_HEAD(&mod->mod_replay_list);
 745
 746                 spin_lock(&open_req->rq_lock);
 747                 och->och_mod = mod;
 748                 mod->mod_och = och;
 749                 open_req->rq_cb_data = mod;
 750                 list_add_tail(&open_req->rq_mod_list, &mod->mod_replay_list);
 751                 open_req->rq_commit_cb = mdc_commit_delayed;
 752                 spin_unlock(&open_req->rq_lock);
 753         }
 754
 755         rec->cr_fid2 = body->fid1;
 756         rec->cr_ioepoch = body->ioepoch;
 757         rec->cr_old_handle.cookie = body->handle.cookie;
 758         open_req->rq_replay_cb = mdc_replay_open;
 759         if (!fid_is_sane(&body->fid1)) {
 760                 DEBUG_REQ(D_ERROR, open_req, "Saving replay request with "
 761                           "insane fid");
 762                 LBUG();
 763         }
 764
 765         DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
 766         RETURN(0);
 767 }
 768
 769 int mdc_clear_open_replay_data(struct obd_export *exp,
 770                                struct obd_client_handle *och)
 771 {
 772         struct md_open_data *mod = och->och_mod;
 773         ENTRY;
 774
 775         /*
 776          * Don't free the structure now (it happens in mdc_commit_delayed(),
 777          * after the last request is removed from its replay list),
 778          * but make sure that replay doesn't poke at the och, which is about to
 779          * be freed.
 780          */
 781         LASSERT(mod != LP_POISON);
 782         if (mod != NULL)
 783                 mod->mod_och = NULL;
 784
 785         och->och_mod = NULL;
 786         RETURN(0);
 787 }
 788
 789 int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 790               struct md_open_data *mod, struct ptlrpc_request **request)
 791 {
 792         struct obd_device     *obd = class_exp2obd(exp);
 793         struct ptlrpc_request *req;
 794         int                    rc;
 795         ENTRY;
 796
 797         *request = NULL;
 798         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_CLOSE);
 799         if (req == NULL)
 800                 RETURN(-ENOMEM);
 801
 802         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 803
 804         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
 805         if (rc) {
 806                 ptlrpc_request_free(req);
 807                 RETURN(rc);
 808         }
 809
 810         /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
 811          * portal whose threads are not taking any DLM locks and are therefore
 812          * always progressing */
 813         req->rq_request_portal = MDS_READPAGE_PORTAL;
 814         ptlrpc_at_set_req_timeout(req);
 815
 816         /* Ensure that this close's handle is fixed up during replay. */
 817         if (likely(mod != NULL))
 818                 list_add_tail(&req->rq_mod_list, &mod->mod_replay_list);
 819         else
 820                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 821
 822         mdc_close_pack(req, op_data);
 823
 824         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
 825                              obd->u.cli.cl_max_mds_easize);
 826         req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
 827                              obd->u.cli.cl_max_mds_cookiesize);
 828
 829         ptlrpc_request_set_replen(req);
 830
 831         req->rq_commit_cb = mdc_commit_delayed;
 832         req->rq_replay = 1;
 833         LASSERT(req->rq_cb_data == NULL);
 834         req->rq_cb_data = mod;
 835
 836         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 837         rc = ptlrpc_queue_wait(req);
 838         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 839
 840         if (req->rq_repmsg == NULL) {
 841                 CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
 842                        req->rq_status);
 843                 if (rc == 0)
 844                         rc = req->rq_status ?: -EIO;
 845         } else if (rc == 0 || rc == -EAGAIN) {
 846                 struct mdt_body *body;
 847
 848                 rc = lustre_msg_get_status(req->rq_repmsg);
 849                 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
 850                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
 851                                   "= %d", rc);
 852                         if (rc > 0)
 853                                 rc = -rc;
 854                 } else if (mod == NULL) {
 855                         if (req->rq_import->imp_replayable)
 856                                 CERROR("Unexpected: can't find md_open_data,"
 857                                        "but close succeeded with replayable imp"
 858                                        "Please tell CFS.\n");
 859                 }
 860
 861                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 862                 if (body == NULL)
 863                         rc = -EPROTO;
 864         }
 865
 866         EXIT;
 867         if (rc != 0 && rc != -EAGAIN && req && req->rq_commit_cb)
 868                 req->rq_commit_cb(req);
 869
 870         *request = req;
 871         return rc;
 872 }
 873
 874 int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 875                      struct md_open_data *mod)
 876 {
 877         struct obd_device     *obd = class_exp2obd(exp);
 878         struct ptlrpc_request *req;
 879         int                    rc;
 880         ENTRY;
 881
 882         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 883                                    &RQF_MDS_DONE_WRITING);
 884         if (req == NULL)
 885                 RETURN(-ENOMEM);
 886
 887         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 888         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_DONE_WRITING);
 889         if (rc) {
 890                 ptlrpc_request_free(req);
 891                 RETURN(rc);
 892         }
 893
 894         /* XXX: add DONE_WRITING request to och -- when Size-on-MDS
 895          * recovery will be ready. */
 896         mdc_close_pack(req, op_data);
 897         ptlrpc_request_set_replen(req);
 898         req->rq_replay = 1;
 899         req->rq_cb_data = mod;
 900         req->rq_commit_cb = mdc_commit_delayed;
 901         if (likely(mod != NULL))
 902                 list_add_tail(&req->rq_mod_list, &mod->mod_replay_list);
 903         else
 904                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 905
 906         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 907         rc = ptlrpc_queue_wait(req);
 908         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 909
 910         /* Close the open replay sequence if an error occured or no SOM
 911          * attribute update is needed. */
 912         if (rc != -EAGAIN)
 913                 ptlrpc_close_replay_seq(req);
 914
 915         if (rc && rc != -EAGAIN && req->rq_commit_cb)
 916                 req->rq_commit_cb(req);
 917
 918         ptlrpc_req_finished(req);
 919         RETURN(rc);
 920 }
 921
 922 #ifdef HAVE_SPLIT_SUPPORT
 923 int mdc_sendpage(struct obd_export *exp, const struct lu_fid *fid,
 924                  const struct page *page, int offset)
 925 {
 926         struct ptlrpc_request   *req;
 927         struct ptlrpc_bulk_desc *desc;
 928         int                      rc;
 929         ENTRY;
 930
 931         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_WRITEPAGE);
 932         if (req == NULL)
 933                 RETURN(-ENOMEM);
 934
 935         /* FIXME: capa doesn't support split yet */
 936         mdc_set_capa_size(req, &RMF_CAPA1, NULL);
 937
 938         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_WRITEPAGE);
 939         if (rc) {
 940                 ptlrpc_request_free(req);
 941                 RETURN(rc);
 942         }
 943
 944         req->rq_request_portal = MDS_READPAGE_PORTAL;
 945         ptlrpc_at_set_req_timeout(req);
 946
 947         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_GET_SOURCE, MDS_BULK_PORTAL);
 948         if (desc == NULL)
 949                 GOTO(out, rc = -ENOMEM);
 950
 951         /* NB req now owns desc and will free it when it gets freed. */
 952         ptlrpc_prep_bulk_page(desc, (struct page *)page, 0, offset);
 953         mdc_readdir_pack(req, 0, offset, fid, NULL);
 954
 955         ptlrpc_request_set_replen(req);
 956         rc = ptlrpc_queue_wait(req);
 957         GOTO(out, rc);
 958 out:
 959         ptlrpc_req_finished(req);
 960         return rc;
 961 }
 962 EXPORT_SYMBOL(mdc_sendpage);
 963 #endif
 964
 965 int mdc_readpage(struct obd_export *exp, const struct lu_fid *fid,
 966                  struct obd_capa *oc, __u64 offset, struct page *page,
 967                  struct ptlrpc_request **request)
 968 {
 969         struct ptlrpc_request   *req;
 970         struct ptlrpc_bulk_desc *desc;
 971         int                      rc;
 972         ENTRY;
 973
 974         *request = NULL;
 975         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
 976         if (req == NULL)
 977                 RETURN(-ENOMEM);
 978
 979         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 980
 981         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
 982         if (rc) {
 983                 ptlrpc_request_free(req);
 984                 RETURN(rc);
 985         }
 986
 987         req->rq_request_portal = MDS_READPAGE_PORTAL;
 988         ptlrpc_at_set_req_timeout(req);
 989
 990         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_PUT_SINK, MDS_BULK_PORTAL);
 991         if (desc == NULL) {
 992                 ptlrpc_request_free(req);
 993                 RETURN(-ENOMEM);
 994         }
 995
 996         /* NB req now owns desc and will free it when it gets freed */
 997         ptlrpc_prep_bulk_page(desc, page, 0, CFS_PAGE_SIZE);
 998         mdc_readdir_pack(req, offset, CFS_PAGE_SIZE, fid, oc);
 999
1000         ptlrpc_request_set_replen(req);
1001         rc = ptlrpc_queue_wait(req);
1002         if (rc) {
1003                 ptlrpc_req_finished(req);
1004                 RETURN(rc);
1005         }
1006
1007         if (req->rq_bulk->bd_nob_transferred != CFS_PAGE_SIZE) {
1008                 CERROR("Unexpected # bytes transferred: %d (%ld expected)\n",
1009                         req->rq_bulk->bd_nob_transferred, CFS_PAGE_SIZE);
1010                 ptlrpc_req_finished(req);
1011                 RETURN(-EPROTO);
1012         }
1013
1014         *request = req;
1015         RETURN(0);
1016 }
1017
1018 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1019                          void *karg, void *uarg)
1020 {
1021         struct obd_device *obd = exp->exp_obd;
1022         struct obd_ioctl_data *data = karg;
1023         struct obd_import *imp = obd->u.cli.cl_import;
1024         struct llog_ctxt *ctxt;
1025         int rc;
1026         ENTRY;
1027
1028         if (!try_module_get(THIS_MODULE)) {
1029                 CERROR("Can't get module. Is it alive?");
1030                 return -EINVAL;
1031         }
1032         switch (cmd) {
1033         case OBD_IOC_CLIENT_RECOVER:
1034                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1);
1035                 if (rc < 0)
1036                         GOTO(out, rc);
1037                 GOTO(out, rc = 0);
1038         case IOC_OSC_SET_ACTIVE:
1039                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
1040                 GOTO(out, rc);
1041         case OBD_IOC_PARSE: {
1042                 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
1043                 rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
1044                 llog_ctxt_put(ctxt);
1045                 GOTO(out, rc);
1046         }
1047 #ifdef __KERNEL__
1048         case OBD_IOC_LLOG_INFO:
1049         case OBD_IOC_LLOG_PRINT: {
1050                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1051                 rc = llog_ioctl(ctxt, cmd, data);
1052                 llog_ctxt_put(ctxt);
1053                 GOTO(out, rc);
1054         }
1055 #endif
1056         case OBD_IOC_POLL_QUOTACHECK:
1057                 rc = lquota_poll_check(quota_interface, exp,
1058                                        (struct if_quotacheck *)karg);
1059                 GOTO(out, rc);
1060         default:
1061                 CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd);
1062                 GOTO(out, rc = -ENOTTY);
1063         }
1064 out:
1065         module_put(THIS_MODULE);
1066
1067         return rc;
1068 }
1069
1070 static int do_set_info_async(struct obd_export *exp,
1071                              obd_count keylen, void *key,
1072                              obd_count vallen, void *val,
1073                              struct ptlrpc_request_set *set)
1074 {
1075         struct obd_import     *imp = class_exp2cliimp(exp);
1076         struct ptlrpc_request *req;
1077         char                  *tmp;
1078         int                    rc;
1079         ENTRY;
1080
1081         if (vallen != sizeof(int))
1082                 RETURN(-EINVAL);
1083
1084         spin_lock(&imp->imp_lock);
1085         if (*((int *)val)) {
1086                 imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
1087                 imp->imp_connect_data.ocd_connect_flags |= OBD_CONNECT_RDONLY;
1088         } else {
1089                 imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
1090                 imp->imp_connect_data.ocd_connect_flags &= ~OBD_CONNECT_RDONLY;
1091         }
1092         spin_unlock(&imp->imp_lock);
1093
1094         req = ptlrpc_request_alloc(imp, &RQF_MDS_SET_INFO);
1095         if (req == NULL)
1096                 RETURN(-ENOMEM);
1097
1098         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
1099                              RCL_CLIENT, keylen);
1100         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
1101                              RCL_CLIENT, vallen);
1102         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SET_INFO);
1103         if (rc) {
1104                 ptlrpc_request_free(req);
1105                 RETURN(rc);
1106         }
1107
1108         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1109         memcpy(tmp, key, keylen);
1110         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1111         memcpy(tmp, val, vallen);
1112
1113         ptlrpc_request_set_replen(req);
1114
1115         if (set) {
1116                 ptlrpc_set_add_req(set, req);
1117                 ptlrpc_check_set(set);
1118         } else {
1119                 rc = ptlrpc_queue_wait(req);
1120                 ptlrpc_req_finished(req);
1121         }
1122
1123         RETURN(rc);
1124 }
1125
1126 int mdc_set_info_async(struct obd_export *exp,
1127                        obd_count keylen, void *key,
1128                        obd_count vallen, void *val,
1129                        struct ptlrpc_request_set *set)
1130 {
1131         struct obd_import *imp = class_exp2cliimp(exp);
1132         int                rc = -EINVAL;
1133         ENTRY;
1134
1135         if (KEY_IS(KEY_INIT_RECOV)) {
1136                 if (vallen != sizeof(int))
1137                         RETURN(-EINVAL);
1138                 spin_lock(&imp->imp_lock);
1139                 imp->imp_initial_recov = *(int *)val;
1140                 spin_unlock(&imp->imp_lock);
1141                 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
1142                        exp->exp_obd->obd_name, imp->imp_initial_recov);
1143                 RETURN(0);
1144         }
1145         /* Turn off initial_recov after we try all backup servers once */
1146         if (KEY_IS(KEY_INIT_RECOV_BACKUP)) {
1147                 if (vallen != sizeof(int))
1148                         RETURN(-EINVAL);
1149                 spin_lock(&imp->imp_lock);
1150                 imp->imp_initial_recov_bk = *(int *)val;
1151                 if (imp->imp_initial_recov_bk)
1152                         imp->imp_initial_recov = 1;
1153                 spin_unlock(&imp->imp_lock);
1154                 CDEBUG(D_HA, "%s: set imp_initial_recov_bk = %d\n",
1155                        exp->exp_obd->obd_name, imp->imp_initial_recov_bk);
1156                 RETURN(0);
1157         }
1158         if (KEY_IS(KEY_READ_ONLY)) {
1159                 rc = do_set_info_async(exp, keylen, key, vallen, val, set);
1160                 RETURN(rc);
1161         }
1162         if (KEY_IS(KEY_FLUSH_CTX)) {
1163                 sptlrpc_import_flush_my_ctx(imp);
1164                 RETURN(0);
1165         }
1166         if (KEY_IS(KEY_MDS_CONN)) {
1167                 struct obd_import *imp = class_exp2cliimp(exp);
1168
1169                 /* mds-mds import */
1170                 spin_lock(&imp->imp_lock);
1171                 imp->imp_server_timeout = 1;
1172                 spin_unlock(&imp->imp_lock);
1173                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1174                 CDEBUG(D_OTHER|D_WARNING, "%s: timeout / 2\n", exp->exp_obd->obd_name);
1175                 RETURN(0);
1176         }
1177
1178         RETURN(rc);
1179 }
1180
1181 int mdc_get_info(struct obd_export *exp, __u32 keylen, void *key,
1182                  __u32 *vallen, void *val)
1183 {
1184         int rc = -EINVAL;
1185
1186         if (KEY_IS(KEY_MAX_EASIZE)) {
1187                 int mdsize, *max_easize;
1188
1189                 if (*vallen != sizeof(int))
1190                         RETURN(-EINVAL);
1191                 mdsize = *(int*)val;
1192                 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
1193                         exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
1194                 max_easize = val;
1195                 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
1196                 RETURN(0);
1197         }
1198         if (KEY_IS(KEY_CONN_DATA)) {
1199                 struct obd_import *imp = class_exp2cliimp(exp);
1200                 struct obd_connect_data *data = val;
1201
1202                 if (*vallen != sizeof(*data))
1203                         RETURN(-EINVAL);
1204
1205                 *data = imp->imp_connect_data;
1206                 RETURN(0);
1207         }
1208
1209         RETURN(rc);
1210 }
1211
1212 static int mdc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1213                       __u64 max_age, __u32 flags)
1214 {
1215         struct ptlrpc_request *req;
1216         struct obd_statfs     *msfs;
1217         struct obd_import     *imp = NULL;
1218         int                    rc;
1219         ENTRY;
1220
1221
1222         /*Since the request might also come from lprocfs, so we need
1223          *sync this with client_disconnect_export Bug15684*/
1224         down_read(&obd->u.cli.cl_sem);
1225         if (obd->u.cli.cl_import)
1226                 imp = class_import_get(obd->u.cli.cl_import);
1227         up_read(&obd->u.cli.cl_sem);
1228         if (!imp)
1229                 RETURN(-ENODEV);
1230
1231         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_STATFS,
1232                                         LUSTRE_MDS_VERSION, MDS_STATFS);
1233         if (req == NULL)
1234                 GOTO(output, rc = -ENOMEM);
1235
1236         ptlrpc_request_set_replen(req);
1237
1238         if (flags & OBD_STATFS_NODELAY) {
1239                 /* procfs requests not want stay in wait for avoid deadlock */
1240                 req->rq_no_resend = 1;
1241                 req->rq_no_delay = 1;
1242         }
1243
1244         rc = ptlrpc_queue_wait(req);
1245         if (rc) {
1246                 /* check connection error first */
1247                 if (imp->imp_connect_error)
1248                         rc = imp->imp_connect_error;
1249                 GOTO(out, rc);
1250         }
1251
1252         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1253         if (msfs == NULL)
1254                 GOTO(out, rc = -EPROTO);
1255
1256         *osfs = *msfs;
1257         EXIT;
1258 out:
1259         ptlrpc_req_finished(req);
1260 output:
1261         class_import_put(imp);
1262         return rc;
1263 }
1264
1265 static int mdc_pin(struct obd_export *exp, const struct lu_fid *fid,
1266                    struct obd_capa *oc, struct obd_client_handle *handle,
1267                    int flags)
1268 {
1269         struct ptlrpc_request *req;
1270         struct mdt_body       *body;
1271         int                    rc;
1272         ENTRY;
1273
1274         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_PIN);
1275         if (req == NULL)
1276                 RETURN(-ENOMEM);
1277
1278         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1279
1280         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_PIN);
1281         if (rc) {
1282                 ptlrpc_request_free(req);
1283                 RETURN(rc);
1284         }
1285
1286         mdc_pack_body(req, fid, oc, 0, 0, -1, flags);
1287
1288         ptlrpc_request_set_replen(req);
1289
1290         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1291         rc = ptlrpc_queue_wait(req);
1292         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1293         if (rc) {
1294                 CERROR("Pin failed: %d\n", rc);
1295                 GOTO(err_out, rc);
1296         }
1297
1298         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1299         if (body == NULL)
1300                 GOTO(err_out, rc = -EPROTO);
1301
1302         handle->och_fh = body->handle;
1303         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
1304
1305         OBD_ALLOC_PTR(handle->och_mod);
1306         if (handle->och_mod == NULL) {
1307                 DEBUG_REQ(D_ERROR, req, "can't allocate mdc_open_data");
1308                 GOTO(err_out, rc = -ENOMEM);
1309         }
1310         /* will be dropped by unpin */
1311         CFS_INIT_LIST_HEAD(&handle->och_mod->mod_replay_list);
1312         list_add_tail(&req->rq_mod_list, &handle->och_mod->mod_replay_list);
1313
1314         RETURN(0);
1315
1316 err_out:
1317         ptlrpc_req_finished(req);
1318         RETURN(rc);
1319 }
1320
1321 static int mdc_unpin(struct obd_export *exp, struct obd_client_handle *handle,
1322                      int flag)
1323 {
1324         struct ptlrpc_request *req;
1325         struct mdt_body       *body;
1326         int                    rc;
1327         ENTRY;
1328
1329         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_UNPIN,
1330                                         LUSTRE_MDS_VERSION, MDS_UNPIN);
1331         if (req == NULL)
1332                 RETURN(-ENOMEM);
1333
1334         body = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY);
1335         body->handle = handle->och_fh;
1336         body->flags = flag;
1337
1338         ptlrpc_request_set_replen(req);
1339
1340         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1341         rc = ptlrpc_queue_wait(req);
1342         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1343
1344         if (rc != 0)
1345                 CERROR("Unpin failed: %d\n", rc);
1346
1347         ptlrpc_req_finished(req);
1348
1349         LASSERT(!list_empty(&handle->och_mod->mod_replay_list));
1350         req = list_entry(handle->och_mod->mod_replay_list.next,
1351                          typeof(*req), rq_mod_list);
1352         list_del_init(&req->rq_mod_list);
1353         ptlrpc_req_finished(req);
1354         LASSERT(list_empty(&handle->och_mod->mod_replay_list));
1355
1356         OBD_FREE(handle->och_mod, sizeof(*handle->och_mod));
1357         RETURN(rc);
1358 }
1359
1360 int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
1361              struct obd_capa *oc, struct ptlrpc_request **request)
1362 {
1363         struct ptlrpc_request *req;
1364         int                    rc;
1365         ENTRY;
1366
1367         *request = NULL;
1368         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
1369         if (req == NULL)
1370                 RETURN(-ENOMEM);
1371
1372         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1373
1374         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
1375         if (rc) {
1376                 ptlrpc_request_free(req);
1377                 RETURN(rc);
1378         }
1379
1380         mdc_pack_body(req, fid, oc, 0, 0, -1, 0);
1381
1382         ptlrpc_request_set_replen(req);
1383
1384         rc = ptlrpc_queue_wait(req);
1385         if (rc)
1386                 ptlrpc_req_finished(req);
1387         else
1388                 *request = req;
1389         RETURN(rc);
1390 }
1391
1392 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
1393                             enum obd_import_event event)
1394 {
1395         int rc = 0;
1396
1397         LASSERT(imp->imp_obd == obd);
1398
1399         switch (event) {
1400         case IMP_EVENT_DISCON: {
1401 #if 0
1402                 /* XXX Pass event up to OBDs stack. used only for FLD now */
1403                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
1404 #endif
1405                 break;
1406         }
1407         case IMP_EVENT_INACTIVE: {
1408                 struct client_obd *cli = &obd->u.cli;
1409                 /*
1410                  * Flush current sequence to make client obtain new one
1411                  * from server in case of disconnect/reconnect.
1412                  * If range is already empty then no need to flush it.
1413                  */
1414                 if (cli->cl_seq != NULL &&
1415                     !range_is_exhausted(&cli->cl_seq->lcs_space)) {
1416                         seq_client_flush(cli->cl_seq);
1417                 }
1418
1419                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
1420                 break;
1421         }
1422         case IMP_EVENT_INVALIDATE: {
1423                 struct ldlm_namespace *ns = obd->obd_namespace;
1424
1425                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
1426
1427                 break;
1428         }
1429         case IMP_EVENT_ACTIVE: {
1430                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
1431                 break;
1432         }
1433         case IMP_EVENT_OCD:
1434                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
1435                 break;
1436
1437         default:
1438                 CERROR("Unknown import event %x\n", event);
1439                 LBUG();
1440         }
1441         RETURN(rc);
1442 }
1443
1444 static int mdc_fid_init(struct obd_export *exp)
1445 {
1446         struct client_obd *cli = &exp->exp_obd->u.cli;
1447         char *prefix;
1448         int rc;
1449         ENTRY;
1450
1451         OBD_ALLOC_PTR(cli->cl_seq);
1452         if (cli->cl_seq == NULL)
1453                 RETURN(-ENOMEM);
1454
1455         OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
1456         if (prefix == NULL)
1457                 GOTO(out_free_seq, rc = -ENOMEM);
1458
1459         snprintf(prefix, MAX_OBD_NAME + 5, "srv-%s",
1460                  exp->exp_obd->obd_name);
1461
1462         /* Init client side sequence-manager */
1463         rc = seq_client_init(cli->cl_seq, exp,
1464                              LUSTRE_SEQ_METADATA,
1465                              prefix, NULL);
1466         OBD_FREE(prefix, MAX_OBD_NAME + 5);
1467         if (rc)
1468                 GOTO(out_free_seq, rc);
1469
1470         RETURN(rc);
1471 out_free_seq:
1472         OBD_FREE_PTR(cli->cl_seq);
1473         cli->cl_seq = NULL;
1474         return rc;
1475 }
1476
1477 static int mdc_fid_fini(struct obd_export *exp)
1478 {
1479         struct client_obd *cli = &exp->exp_obd->u.cli;
1480         ENTRY;
1481
1482         if (cli->cl_seq != NULL) {
1483                 seq_client_fini(cli->cl_seq);
1484                 OBD_FREE_PTR(cli->cl_seq);
1485                 cli->cl_seq = NULL;
1486         }
1487
1488         RETURN(0);
1489 }
1490
1491 int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1492                   struct md_op_data *op_data)
1493 {
1494         struct client_obd *cli = &exp->exp_obd->u.cli;
1495         struct lu_client_seq *seq = cli->cl_seq;
1496         ENTRY;
1497         RETURN(seq_client_alloc_fid(seq, fid));
1498 }
1499
1500 /* XXX This method is used only to clear current fid seq
1501  * once fld/mds insert failed */
1502 static int mdc_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
1503 {
1504         struct client_obd *cli = &exp->exp_obd->u.cli;
1505
1506         seq_client_flush(cli->cl_seq);
1507         return 0;
1508 }
1509
1510 static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
1511 {
1512         struct client_obd *cli = &obd->u.cli;
1513         struct lprocfs_static_vars lvars = { 0 };
1514         int rc;
1515         ENTRY;
1516
1517         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1518         if (!cli->cl_rpc_lock)
1519                 RETURN(-ENOMEM);
1520         mdc_init_rpc_lock(cli->cl_rpc_lock);
1521
1522         ptlrpcd_addref();
1523
1524         OBD_ALLOC(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1525         if (!cli->cl_setattr_lock)
1526                 GOTO(err_rpc_lock, rc = -ENOMEM);
1527         mdc_init_rpc_lock(cli->cl_setattr_lock);
1528
1529         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1530         if (!cli->cl_close_lock)
1531                 GOTO(err_setattr_lock, rc = -ENOMEM);
1532         mdc_init_rpc_lock(cli->cl_close_lock);
1533
1534         rc = client_obd_setup(obd, cfg);
1535         if (rc)
1536                 GOTO(err_close_lock, rc);
1537         lprocfs_mdc_init_vars(&lvars);
1538         lprocfs_obd_setup(obd, lvars.obd_vars);
1539         sptlrpc_lprocfs_cliobd_attach(obd);
1540         ptlrpc_lprocfs_register_obd(obd);
1541
1542         rc = obd_llog_init(obd, &obd->obd_olg, obd, 0, NULL, NULL);
1543         if (rc) {
1544                 mdc_cleanup(obd);
1545                 CERROR("failed to setup llogging subsystems\n");
1546         }
1547
1548         RETURN(rc);
1549
1550 err_close_lock:
1551         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1552 err_setattr_lock:
1553         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1554 err_rpc_lock:
1555         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1556         ptlrpcd_decref();
1557         RETURN(rc);
1558 }
1559
1560 /* Initialize the default and maximum LOV EA and cookie sizes.  This allows
1561  * us to make MDS RPCs with large enough reply buffers to hold the
1562  * maximum-sized (= maximum striped) EA and cookie without having to
1563  * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
1564 static int mdc_init_ea_size(struct obd_export *exp, int easize,
1565                      int def_easize, int cookiesize)
1566 {
1567         struct obd_device *obd = exp->exp_obd;
1568         struct client_obd *cli = &obd->u.cli;
1569         ENTRY;
1570
1571         if (cli->cl_max_mds_easize < easize)
1572                 cli->cl_max_mds_easize = easize;
1573
1574         if (cli->cl_default_mds_easize < def_easize)
1575                 cli->cl_default_mds_easize = def_easize;
1576
1577         if (cli->cl_max_mds_cookiesize < cookiesize)
1578                 cli->cl_max_mds_cookiesize = cookiesize;
1579
1580         RETURN(0);
1581 }
1582
1583 static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
1584 {
1585         int rc = 0;
1586         ENTRY;
1587
1588         switch (stage) {
1589         case OBD_CLEANUP_EARLY:
1590         case OBD_CLEANUP_EXPORTS:
1591                 /* If we set up but never connected, the
1592                    client import will not have been cleaned. */
1593                 if (obd->u.cli.cl_import) {
1594                         struct obd_import *imp;
1595                         imp = obd->u.cli.cl_import;
1596                         CERROR("client import never connected\n");
1597                         ptlrpc_invalidate_import(imp);
1598                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
1599                         class_destroy_import(imp);
1600                         obd->u.cli.cl_import = NULL;
1601                 }
1602                 rc = obd_llog_finish(obd, 0);
1603                 if (rc != 0)
1604                         CERROR("failed to cleanup llogging subsystems\n");
1605                 break;
1606         }
1607         RETURN(rc);
1608 }
1609
1610 static int mdc_cleanup(struct obd_device *obd)
1611 {
1612         struct client_obd *cli = &obd->u.cli;
1613
1614         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1615         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1616         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1617
1618         ptlrpc_lprocfs_unregister_obd(obd);
1619         lprocfs_obd_cleanup(obd);
1620         ptlrpcd_decref();
1621
1622         return client_obd_cleanup(obd);
1623 }
1624
1625
1626 static int mdc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
1627                          struct obd_device *tgt, int count,
1628                          struct llog_catid *logid, struct obd_uuid *uuid)
1629 {
1630         struct llog_ctxt *ctxt;
1631         int rc;
1632         ENTRY;
1633
1634         LASSERT(olg == &obd->obd_olg);
1635
1636         rc = llog_setup(obd, olg, LLOG_LOVEA_REPL_CTXT, tgt, 0,
1637                         NULL, &llog_client_ops);
1638         if (rc == 0) {
1639                 ctxt = llog_get_context(obd, LLOG_LOVEA_REPL_CTXT);
1640                 llog_initiator_connect(ctxt);
1641                 llog_ctxt_put(ctxt);
1642         }
1643
1644         RETURN(rc);
1645 }
1646
1647 static int mdc_llog_finish(struct obd_device *obd, int count)
1648 {
1649         struct llog_ctxt *ctxt;
1650         int rc = 0;
1651         ENTRY;
1652
1653         ctxt = llog_get_context(obd, LLOG_LOVEA_REPL_CTXT);
1654         if (ctxt)
1655                 rc = llog_cleanup(ctxt);
1656
1657         RETURN(rc);
1658 }
1659
1660 static int mdc_process_config(struct obd_device *obd, obd_count len, void *buf)
1661 {
1662         struct lustre_cfg *lcfg = buf;
1663         struct lprocfs_static_vars lvars = { 0 };
1664         int rc = 0;
1665
1666         lprocfs_mdc_init_vars(&lvars);
1667
1668         switch (lcfg->lcfg_command) {
1669         case LCFG_SPTLRPC_CONF:
1670                 rc = sptlrpc_cliobd_process_config(obd, lcfg);
1671                 break;
1672         default:
1673                 rc = class_process_proc_param(PARAM_MDC, lvars.obd_vars,
1674                                               lcfg, obd);
1675                 break;
1676         }
1677         return(rc);
1678 }
1679
1680
1681 /* get remote permission for current user on fid */
1682 int mdc_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
1683                         struct obd_capa *oc, __u32 suppgid,
1684                         struct ptlrpc_request **request)
1685 {
1686         struct ptlrpc_request  *req;
1687         int                    rc;
1688         ENTRY;
1689
1690         LASSERT(client_is_remote(exp));
1691
1692         *request = NULL;
1693         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
1694         if (req == NULL)
1695                 RETURN(-ENOMEM);
1696
1697         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1698
1699         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
1700         if (rc) {
1701                 ptlrpc_request_free(req);
1702                 RETURN(rc);
1703         }
1704
1705         mdc_pack_body(req, fid, oc, OBD_MD_FLRMTPERM, 0, suppgid, 0);
1706
1707         req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
1708                              sizeof(struct mdt_remote_perm));
1709
1710         ptlrpc_request_set_replen(req);
1711
1712         rc = ptlrpc_queue_wait(req);
1713         if (rc)
1714                 ptlrpc_req_finished(req);
1715         else
1716                 *request = req;
1717         RETURN(rc);
1718 }
1719
1720 static int mdc_interpret_renew_capa(struct ptlrpc_request *req, void *unused,
1721                                     int status)
1722 {
1723         struct obd_capa *oc = req->rq_async_args.pointer_arg[0];
1724         renew_capa_cb_t cb = req->rq_async_args.pointer_arg[1];
1725         struct mdt_body *body = NULL;
1726         struct lustre_capa *capa;
1727         ENTRY;
1728
1729         if (status)
1730                 GOTO(out, capa = ERR_PTR(status));
1731
1732         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1733         if (body == NULL)
1734                 GOTO(out, capa = ERR_PTR(-EFAULT));
1735
1736         if ((body->valid & OBD_MD_FLOSSCAPA) == 0)
1737                 GOTO(out, capa = ERR_PTR(-ENOENT));
1738
1739         capa = req_capsule_server_get(&req->rq_pill, &RMF_CAPA2);
1740         if (!capa)
1741                 GOTO(out, capa = ERR_PTR(-EFAULT));
1742         EXIT;
1743 out:
1744         cb(oc, capa);
1745         return 0;
1746 }
1747
1748 static int mdc_renew_capa(struct obd_export *exp, struct obd_capa *oc,
1749                           renew_capa_cb_t cb)
1750 {
1751         struct ptlrpc_request *req;
1752         ENTRY;
1753
1754         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_GETATTR,
1755                                         LUSTRE_MDS_VERSION, MDS_GETATTR);
1756         if (req == NULL)
1757                 RETURN(-ENOMEM);
1758
1759         /* NB, OBD_MD_FLOSSCAPA is set here, but it doesn't necessarily mean the
1760          * capa to renew is oss capa.
1761          */
1762         mdc_pack_body(req, &oc->c_capa.lc_fid, oc, OBD_MD_FLOSSCAPA, 0, -1, 0);
1763         ptlrpc_request_set_replen(req);
1764
1765         req->rq_async_args.pointer_arg[0] = oc;
1766         req->rq_async_args.pointer_arg[1] = cb;
1767         req->rq_interpret_reply = mdc_interpret_renew_capa;
1768         ptlrpcd_add_req(req);
1769         RETURN(0);
1770 }
1771
1772 static int mdc_connect(const struct lu_env *env,
1773                        struct lustre_handle *dlm_handle,
1774                        struct obd_device *obd, struct obd_uuid *cluuid,
1775                        struct obd_connect_data *data,
1776                        void *localdata)
1777 {
1778         struct obd_import *imp = obd->u.cli.cl_import;
1779
1780         /* mds-mds import features */
1781         if (data && (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS)) {
1782                 spin_lock(&imp->imp_lock);
1783                 imp->imp_server_timeout = 1;
1784                 spin_unlock(&imp->imp_lock);
1785                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1786                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
1787                        obd->obd_name);
1788         }
1789
1790         return client_connect_import(env, dlm_handle, obd, cluuid, data, NULL);
1791 }
1792
1793 struct obd_ops mdc_obd_ops = {
1794         .o_owner            = THIS_MODULE,
1795         .o_setup            = mdc_setup,
1796         .o_precleanup       = mdc_precleanup,
1797         .o_cleanup          = mdc_cleanup,
1798         .o_add_conn         = client_import_add_conn,
1799         .o_del_conn         = client_import_del_conn,
1800         .o_connect          = mdc_connect,
1801         .o_disconnect       = client_disconnect_export,
1802         .o_iocontrol        = mdc_iocontrol,
1803         .o_set_info_async   = mdc_set_info_async,
1804         .o_statfs           = mdc_statfs,
1805         .o_pin              = mdc_pin,
1806         .o_unpin            = mdc_unpin,
1807         .o_fid_init         = mdc_fid_init,
1808         .o_fid_fini         = mdc_fid_fini,
1809         .o_fid_alloc        = mdc_fid_alloc,
1810         .o_fid_delete       = mdc_fid_delete,
1811         .o_import_event     = mdc_import_event,
1812         .o_llog_init        = mdc_llog_init,
1813         .o_llog_finish      = mdc_llog_finish,
1814         .o_get_info         = mdc_get_info,
1815         .o_process_config  = mdc_process_config,
1816 };
1817
1818 struct md_ops mdc_md_ops = {
1819         .m_getstatus        = mdc_getstatus,
1820         .m_change_cbdata    = mdc_change_cbdata,
1821         .m_close            = mdc_close,
1822         .m_create           = mdc_create,
1823         .m_done_writing     = mdc_done_writing,
1824         .m_enqueue          = mdc_enqueue,
1825         .m_getattr          = mdc_getattr,
1826         .m_getattr_name     = mdc_getattr_name,
1827         .m_intent_lock      = mdc_intent_lock,
1828         .m_link             = mdc_link,
1829         .m_is_subdir        = mdc_is_subdir,
1830         .m_rename           = mdc_rename,
1831         .m_setattr          = mdc_setattr,
1832         .m_setxattr         = mdc_setxattr,
1833         .m_getxattr         = mdc_getxattr,
1834         .m_sync             = mdc_sync,
1835         .m_readpage         = mdc_readpage,
1836         .m_unlink           = mdc_unlink,
1837         .m_cancel_unused    = mdc_cancel_unused,
1838         .m_init_ea_size     = mdc_init_ea_size,
1839         .m_set_lock_data    = mdc_set_lock_data,
1840         .m_lock_match       = mdc_lock_match,
1841         .m_get_lustre_md    = mdc_get_lustre_md,
1842         .m_free_lustre_md   = mdc_free_lustre_md,
1843         .m_set_open_replay_data = mdc_set_open_replay_data,
1844         .m_clear_open_replay_data = mdc_clear_open_replay_data,
1845         .m_renew_capa       = mdc_renew_capa,
1846         .m_get_remote_perm  = mdc_get_remote_perm,
1847         .m_intent_getattr_async = mdc_intent_getattr_async,
1848         .m_revalidate_lock      = mdc_revalidate_lock
1849 };
1850
1851 extern quota_interface_t mdc_quota_interface;
1852
1853 int __init mdc_init(void)
1854 {
1855         int rc;
1856         struct lprocfs_static_vars lvars = { 0 };
1857         lprocfs_mdc_init_vars(&lvars);
1858
1859         request_module("lquota");
1860         quota_interface = PORTAL_SYMBOL_GET(mdc_quota_interface);
1861         init_obd_quota_ops(quota_interface, &mdc_obd_ops);
1862
1863         rc = class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
1864                                  LUSTRE_MDC_NAME, NULL);
1865         if (rc && quota_interface)
1866                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1867
1868         RETURN(rc);
1869 }
1870
1871 #ifdef __KERNEL__
1872 static void /*__exit*/ mdc_exit(void)
1873 {
1874         if (quota_interface)
1875                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1876
1877         class_unregister_type(LUSTRE_MDC_NAME);
1878 }
1879
1880 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1881 MODULE_DESCRIPTION("Lustre Metadata Client");
1882 MODULE_LICENSE("GPL");
1883
1884 module_init(mdc_init);
1885 module_exit(mdc_exit);
1886 #endif