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                 perm = req_capsule_server_get(pill, &RMF_ACL);
 186                 if (perm == NULL)
 187                         RETURN(-EPROTO);
 188         }
 189
 190         if (body->valid & OBD_MD_FLMDSCAPA) {
 191                 struct lustre_capa *capa;
 192                 capa = req_capsule_server_get(pill, &RMF_CAPA1);
 193                 if (capa == NULL)
 194                         RETURN(-EPROTO);
 195         }
 196
 197         RETURN(0);
 198 }
 199
 200 int mdc_getattr(struct obd_export *exp, const struct lu_fid *fid,
 201                 struct obd_capa *oc, obd_valid valid, int ea_size,
 202                 struct ptlrpc_request **request)
 203 {
 204         struct ptlrpc_request *req;
 205         int                    rc;
 206         ENTRY;
 207
 208         *request = NULL;
 209         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
 210         if (req == NULL)
 211                 RETURN(-ENOMEM);
 212
 213         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 214
 215         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
 216         if (rc) {
 217                 ptlrpc_request_free(req);
 218                 RETURN(rc);
 219         }
 220
 221         /* MDS_BFLAG_EXT_FLAGS: request "new" flags(bug 9486) */
 222         mdc_pack_body(req, fid, oc, valid, ea_size, -1, MDS_BFLAG_EXT_FLAGS);
 223
 224         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, ea_size);
 225         if (valid & OBD_MD_FLRMTPERM)
 226                 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
 227                                      sizeof(struct mdt_remote_perm));
 228         ptlrpc_request_set_replen(req);
 229
 230         rc = mdc_getattr_common(exp, req);
 231         if (rc)
 232                 ptlrpc_req_finished(req);
 233         else
 234                 *request = req;
 235         RETURN(rc);
 236 }
 237
 238 int mdc_getattr_name(struct obd_export *exp, const struct lu_fid *fid,
 239                      struct obd_capa *oc, const char *filename, int namelen,
 240                      obd_valid valid, int ea_size, __u32 suppgid,
 241                      struct ptlrpc_request **request)
 242 {
 243         struct ptlrpc_request *req;
 244         int                    rc;
 245         ENTRY;
 246
 247         *request = NULL;
 248         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 249                                    &RQF_MDS_GETATTR_NAME);
 250         if (req == NULL)
 251                 RETURN(-ENOMEM);
 252
 253         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 254         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT, namelen);
 255
 256         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR_NAME);
 257         if (rc) {
 258                 ptlrpc_request_free(req);
 259                 RETURN(rc);
 260         }
 261
 262         /* MDS_BFLAG_EXT_FLAGS: request "new" flags(bug 9486) */
 263         mdc_pack_body(req, fid, oc, valid, ea_size, suppgid,
 264                       MDS_BFLAG_EXT_FLAGS);
 265
 266         if (filename) {
 267                 char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 268                 LASSERT(strnlen(filename, namelen) == namelen - 1);
 269                 memcpy(name, filename, namelen);
 270         }
 271
 272         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, ea_size);
 273         ptlrpc_request_set_replen(req);
 274
 275         rc = mdc_getattr_common(exp, req);
 276         if (rc)
 277                 ptlrpc_req_finished(req);
 278         else
 279                 *request = req;
 280         RETURN(rc);
 281 }
 282
 283 static int mdc_is_subdir(struct obd_export *exp,
 284                          const struct lu_fid *pfid,
 285                          const struct lu_fid *cfid,
 286                          struct ptlrpc_request **request)
 287 {
 288         struct ptlrpc_request  *req;
 289         int                     rc;
 290
 291         ENTRY;
 292
 293         *request = NULL;
 294         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 295                                         &RQF_MDS_IS_SUBDIR, LUSTRE_MDS_VERSION,
 296                                         MDS_IS_SUBDIR);
 297         if (req == NULL)
 298                 RETURN(-ENOMEM);
 299
 300         mdc_is_subdir_pack(req, pfid, cfid, 0);
 301         ptlrpc_request_set_replen(req);
 302
 303         rc = ptlrpc_queue_wait(req);
 304         if (rc && rc != -EREMOTE)
 305                 ptlrpc_req_finished(req);
 306         else
 307                 *request = req;
 308         RETURN(rc);
 309 }
 310
 311 static int mdc_xattr_common(struct obd_export *exp,const struct req_format *fmt,
 312                             const struct lu_fid *fid,
 313                             struct obd_capa *oc, int opcode, obd_valid valid,
 314                             const char *xattr_name, const char *input,
 315                             int input_size, int output_size, int flags,
 316                             __u32 suppgid, struct ptlrpc_request **request)
 317 {
 318         struct ptlrpc_request *req;
 319         int   xattr_namelen = 0;
 320         char *tmp;
 321         int   rc;
 322         ENTRY;
 323
 324         *request = NULL;
 325         req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
 326         if (req == NULL)
 327                 RETURN(-ENOMEM);
 328
 329         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 330         if (xattr_name) {
 331                 xattr_namelen = strlen(xattr_name) + 1;
 332                 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
 333                                      xattr_namelen);
 334         }
 335         if (input_size) {
 336                 LASSERT(input);
 337                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
 338                                      input_size);
 339         }
 340
 341         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, opcode);
 342         if (rc) {
 343                 ptlrpc_request_free(req);
 344                 RETURN(rc);
 345         }
 346
 347         if (opcode == MDS_REINT) {
 348                 struct mdt_rec_setxattr *rec;
 349
 350                 CLASSERT(sizeof(struct mdt_rec_setxattr) ==
 351                          sizeof(struct mdt_rec_reint));
 352                 rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 353                 rec->sx_opcode = REINT_SETXATTR;
 354                 /* TODO:
 355                  *  cfs_curproc_fs{u,g}id() should replace
 356                  *  current->fs{u,g}id for portability.
 357                  */
 358                 rec->sx_fsuid  = current->fsuid;
 359                 rec->sx_fsgid  = current->fsgid;
 360                 rec->sx_cap    = current->cap_effective;
 361                 rec->sx_suppgid1 = suppgid;
 362                 rec->sx_suppgid1 = -1;
 363                 rec->sx_fid    = *fid;
 364                 rec->sx_valid  = valid;
 365                 rec->sx_size   = output_size;
 366                 rec->sx_flags  = flags;
 367
 368                 mdc_pack_capa(req, &RMF_CAPA1, oc);
 369         } else {
 370                 mdc_pack_body(req, fid, oc, valid, output_size, suppgid, flags);
 371         }
 372
 373         if (xattr_name) {
 374                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 375                 memcpy(tmp, xattr_name, xattr_namelen);
 376         }
 377         if (input_size) {
 378                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
 379                 memcpy(tmp, input, input_size);
 380         }
 381
 382         if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
 383                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
 384                                      RCL_SERVER, output_size);
 385         ptlrpc_request_set_replen(req);
 386
 387         /* make rpc */
 388         if (opcode == MDS_REINT)
 389                 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 390
 391         rc = ptlrpc_queue_wait(req);
 392
 393         if (opcode == MDS_REINT)
 394                 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 395
 396         if (rc)
 397                 ptlrpc_req_finished(req);
 398         else
 399                 *request = req;
 400         RETURN(rc);
 401 }
 402
 403 int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
 404                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 405                  const char *input, int input_size, int output_size,
 406                  int flags, __u32 suppgid, struct ptlrpc_request **request)
 407 {
 408         return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
 409                                 fid, oc, MDS_REINT, valid, xattr_name,
 410                                 input, input_size, output_size, flags,
 411                                 suppgid, request);
 412 }
 413
 414 int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
 415                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 416                  const char *input, int input_size, int output_size,
 417                  int flags, struct ptlrpc_request **request)
 418 {
 419         return mdc_xattr_common(exp, &RQF_MDS_GETXATTR,
 420                                 fid, oc, MDS_GETXATTR, valid, xattr_name,
 421                                 input, input_size, output_size, flags,
 422                                 -1, request);
 423 }
 424
 425 #ifdef CONFIG_FS_POSIX_ACL
 426 static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
 427 {
 428         struct req_capsule     *pill = &req->rq_pill;
 429         struct mdt_body        *body = md->body;
 430         struct posix_acl       *acl;
 431         void                   *buf;
 432         int                     rc;
 433         ENTRY;
 434
 435         if (!body->aclsize)
 436                 RETURN(0);
 437
 438         buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->aclsize);
 439
 440         if (!buf)
 441                 RETURN(-EPROTO);
 442
 443         acl = posix_acl_from_xattr(buf, body->aclsize);
 444         if (IS_ERR(acl)) {
 445                 rc = PTR_ERR(acl);
 446                 CERROR("convert xattr to acl: %d\n", rc);
 447                 RETURN(rc);
 448         }
 449
 450         rc = posix_acl_valid(acl);
 451         if (rc) {
 452                 CERROR("validate acl: %d\n", rc);
 453                 posix_acl_release(acl);
 454                 RETURN(rc);
 455         }
 456
 457         md->posix_acl = acl;
 458         RETURN(0);
 459 }
 460 #else
 461 #define mdc_unpack_acl(req, md) 0
 462 #endif
 463
 464 int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
 465                       struct obd_export *dt_exp, struct obd_export *md_exp,
 466                       struct lustre_md *md)
 467 {
 468         struct req_capsule *pill = &req->rq_pill;
 469         int rc;
 470         ENTRY;
 471
 472         LASSERT(md);
 473         memset(md, 0, sizeof(*md));
 474
 475         md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 476         LASSERT(md->body != NULL);
 477
 478         if (md->body->valid & OBD_MD_FLEASIZE) {
 479                 int lmmsize;
 480                 struct lov_mds_md *lmm;
 481
 482                 if (!S_ISREG(md->body->mode)) {
 483                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, should be a "
 484                                "regular file, but is not\n");
 485                         GOTO(out, rc = -EPROTO);
 486                 }
 487
 488                 if (md->body->eadatasize == 0) {
 489                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, "
 490                                "but eadatasize 0\n");
 491                         GOTO(out, rc = -EPROTO);
 492                 }
 493                 lmmsize = md->body->eadatasize;
 494                 lmm = req_capsule_server_sized_get(pill, &RMF_MDT_MD, lmmsize);
 495                 if (!lmm)
 496                         GOTO(out, rc = -EPROTO);
 497
 498                 rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize);
 499                 if (rc < 0)
 500                         GOTO(out, rc);
 501
 502                 if (rc < sizeof(*md->lsm)) {
 503                         CDEBUG(D_INFO, "lsm size too small: "
 504                                "rc < sizeof (*md->lsm) (%d < "LPSZ")\n",
 505                                rc, sizeof(*md->lsm));
 506                         GOTO(out, rc = -EPROTO);
 507                 }
 508
 509         } else if (md->body->valid & OBD_MD_FLDIREA) {
 510                 int lmvsize;
 511                 struct lov_mds_md *lmv;
 512
 513                 if(!S_ISDIR(md->body->mode)) {
 514                         CDEBUG(D_INFO, "OBD_MD_FLDIREA set, should be a "
 515                                "directory, but is not\n");
 516                         GOTO(out, rc = -EPROTO);
 517                 }
 518
 519                 if (md->body->eadatasize == 0) {
 520                         CDEBUG(D_INFO, "OBD_MD_FLDIREA is set, "
 521                                "but eadatasize 0\n");
 522                         RETURN(-EPROTO);
 523                 }
 524                 if (md->body->valid & OBD_MD_MEA) {
 525                         lmvsize = md->body->eadatasize;
 526                         lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 527                                                            lmvsize);
 528                         if (!lmv)
 529                                 GOTO(out, rc = -EPROTO);
 530
 531                         rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
 532                                           lmvsize);
 533                         if (rc < 0)
 534                                 GOTO(out, rc);
 535
 536                         if (rc < sizeof(*md->mea)) {
 537                                 CDEBUG(D_INFO, "size too small:  "
 538                                        "rc < sizeof(*md->mea) (%d < %d)\n",
 539                                         rc, sizeof(*md->mea));
 540                                 GOTO(out, rc = -EPROTO);
 541                         }
 542                 }
 543         }
 544         rc = 0;
 545
 546         if (md->body->valid & OBD_MD_FLRMTPERM) {
 547                 /* remote permission */
 548                 md->remote_perm = req_capsule_server_get(pill, &RMF_ACL);
 549                 if (!md->remote_perm)
 550                         GOTO(out, rc = -EPROTO);
 551         }
 552         else if (md->body->valid & OBD_MD_FLACL) {
 553                 /* for ACL, it's possible that FLACL is set but aclsize is zero.
 554                  * only when aclsize != 0 there's an actual segment for ACL
 555                  * in reply buffer.
 556                  */
 557                 if (md->body->aclsize) {
 558                         rc = mdc_unpack_acl(req, md);
 559                         if (rc)
 560                                 GOTO(out, rc);
 561 #ifdef CONFIG_FS_POSIX_ACL
 562                 } else {
 563                         md->posix_acl = NULL;
 564 #endif
 565                 }
 566         }
 567         if (md->body->valid & OBD_MD_FLMDSCAPA) {
 568                 struct obd_capa *oc = mdc_unpack_capa(req, &RMF_CAPA1);
 569
 570                 if (IS_ERR(oc))
 571                         GOTO(out, rc = PTR_ERR(oc));
 572                 md->mds_capa = oc;
 573         }
 574
 575         if (md->body->valid & OBD_MD_FLOSSCAPA) {
 576                 struct obd_capa *oc = mdc_unpack_capa(req, &RMF_CAPA2);
 577
 578                 if (IS_ERR(oc))
 579                         GOTO(out, rc = PTR_ERR(oc));
 580                 md->oss_capa = oc;
 581         }
 582
 583         EXIT;
 584 out:
 585         if (rc) {
 586                 if (md->oss_capa)
 587                         free_capa(md->oss_capa);
 588                 if (md->mds_capa)
 589                         free_capa(md->mds_capa);
 590 #ifdef CONFIG_FS_POSIX_ACL
 591                 posix_acl_release(md->posix_acl);
 592 #endif
 593                 if (md->lsm)
 594                         obd_free_memmd(dt_exp, &md->lsm);
 595         }
 596         return rc;
 597 }
 598
 599 int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
 600 {
 601         ENTRY;
 602         RETURN(0);
 603 }
 604
 605 static void mdc_replay_open(struct ptlrpc_request *req)
 606 {
 607         struct md_open_data *mod = req->rq_cb_data;
 608         struct ptlrpc_request *cur, *tmp;
 609         struct obd_client_handle *och;
 610         struct lustre_handle old;
 611         struct mdt_body *body;
 612         ENTRY;
 613
 614         if (mod == NULL) {
 615                 DEBUG_REQ(D_ERROR, req,
 616                           "Can't properly replay without open data.");
 617                 EXIT;
 618                 return;
 619         }
 620
 621         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 622         LASSERT(body != NULL);
 623
 624         och = mod->mod_och;
 625         if (och != NULL) {
 626                 struct lustre_handle *file_fh;
 627
 628                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 629
 630                 file_fh = &och->och_fh;
 631                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 632                        file_fh->cookie, body->handle.cookie);
 633                 old = *file_fh;
 634                 *file_fh = body->handle;
 635         }
 636         list_for_each_entry_safe(cur, tmp, &mod->mod_replay_list, rq_mod_list) {
 637                 int opc = lustre_msg_get_opc(cur->rq_reqmsg);
 638                 struct mdt_epoch *epoch = NULL;
 639
 640                 if (opc == MDS_CLOSE || opc == MDS_DONE_WRITING) {
 641                         epoch = req_capsule_client_get(&cur->rq_pill,
 642                                                &RMF_MDT_EPOCH);
 643                         LASSERT(epoch);
 644                         DEBUG_REQ(D_HA, cur, "updating %s body with new fh",
 645                                   opc == MDS_CLOSE ? "CLOSE" : "DONE_WRITING");
 646                 } else if (opc == MDS_REINT) {
 647                         struct mdt_rec_setattr *rec;
 648
 649                         /* Check this is REINT_SETATTR. */
 650                         rec = req_capsule_client_get(&cur->rq_pill,
 651                                                &RMF_REC_REINT);
 652                         LASSERT(rec && rec->sa_opcode == REINT_SETATTR);
 653
 654                         epoch = req_capsule_client_get(&cur->rq_pill,
 655                                                &RMF_MDT_EPOCH);
 656                         LASSERT(epoch);
 657                         DEBUG_REQ(D_HA, cur, "updating REINT_SETATTR body "
 658                                   "with new fh");
 659                 }
 660                 if (epoch) {
 661                         if (och != NULL)
 662                                 LASSERT(!memcmp(&old, &epoch->handle,
 663                                                 sizeof(old)));
 664                         epoch->handle = body->handle;
 665                 }
 666         }
 667         EXIT;
 668 }
 669
 670 void mdc_commit_delayed(struct ptlrpc_request *req)
 671 {
 672         struct md_open_data *mod = req->rq_cb_data;
 673         struct ptlrpc_request *cur, *tmp;
 674
 675         DEBUG_REQ(D_HA, req, "req committed");
 676
 677         if (mod == NULL)
 678                 return;
 679
 680         req->rq_cb_data = NULL;
 681         req->rq_commit_cb = NULL;
 682         list_del_init(&req->rq_mod_list);
 683         if (req->rq_sequence) {
 684                 list_for_each_entry_safe(cur, tmp, &mod->mod_replay_list,
 685                                          rq_mod_list) {
 686                         LASSERT(cur != LP_POISON);
 687                         LASSERT(cur->rq_type != LI_POISON);
 688                         DEBUG_REQ(D_HA, cur, "req balanced");
 689                         LASSERT(cur->rq_transno != 0);
 690                         LASSERT(cur->rq_import == req->rq_import);
 691
 692                         /* We no longer want to preserve this for transno-
 693                          * unconditional replay. */
 694                         spin_lock(&cur->rq_lock);
 695                         cur->rq_replay = 0;
 696                         spin_unlock(&cur->rq_lock);
 697                 }
 698         }
 699
 700         if (list_empty(&mod->mod_replay_list)) {
 701                 if (mod->mod_och != NULL)
 702                         mod->mod_och->och_mod = NULL;
 703
 704                 OBD_FREE_PTR(mod);
 705         }
 706 }
 707
 708 int mdc_set_open_replay_data(struct obd_export *exp,
 709                              struct obd_client_handle *och,
 710                              struct ptlrpc_request *open_req)
 711 {
 712         struct md_open_data   *mod;
 713         struct mdt_rec_create *rec;
 714         struct mdt_body       *body;
 715         struct obd_import     *imp = open_req->rq_import;
 716         ENTRY;
 717
 718         rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
 719         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
 720         LASSERT(rec != NULL);
 721         /* Incoming message in my byte order (it's been swabbed). */
 722         /* Outgoing messages always in my byte order. */
 723         LASSERT(body != NULL);
 724
 725         /*Only the import is replayable, we set replay_open data */
 726         if (och && imp->imp_replayable) {
 727                 OBD_ALLOC_PTR(mod);
 728                 if (mod == NULL) {
 729                         DEBUG_REQ(D_ERROR, open_req,
 730                                   "Can't allocate md_open_data");
 731                         RETURN(0);
 732                 }
 733                 CFS_INIT_LIST_HEAD(&mod->mod_replay_list);
 734
 735                 spin_lock(&open_req->rq_lock);
 736                 if (!open_req->rq_replay) {
 737                         OBD_FREE(mod, sizeof(*mod));
 738                         spin_unlock(&open_req->rq_lock);
 739                         RETURN(0);
 740                 }
 741
 742                 och->och_mod = mod;
 743                 mod->mod_och = och;
 744                 open_req->rq_cb_data = mod;
 745                 list_add_tail(&open_req->rq_mod_list, &mod->mod_replay_list);
 746                 open_req->rq_commit_cb = mdc_commit_delayed;
 747                 spin_unlock(&open_req->rq_lock);
 748         }
 749
 750         rec->cr_fid2 = body->fid1;
 751         rec->cr_ioepoch = body->ioepoch;
 752         rec->cr_old_handle.cookie = body->handle.cookie;
 753         open_req->rq_replay_cb = mdc_replay_open;
 754         if (!fid_is_sane(&body->fid1)) {
 755                 DEBUG_REQ(D_ERROR, open_req, "Saving replay request with "
 756                           "insane fid");
 757                 LBUG();
 758         }
 759
 760         DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
 761         RETURN(0);
 762 }
 763
 764 int mdc_clear_open_replay_data(struct obd_export *exp,
 765                                struct obd_client_handle *och)
 766 {
 767         struct md_open_data *mod = och->och_mod;
 768         ENTRY;
 769
 770         /*
 771          * Don't free the structure now (it happens in mdc_commit_delayed(),
 772          * after the last request is removed from its replay list),
 773          * but make sure that replay doesn't poke at the och, which is about to
 774          * be freed.
 775          */
 776         LASSERT(mod != LP_POISON);
 777         if (mod != NULL)
 778                 mod->mod_och = NULL;
 779
 780         och->och_mod = NULL;
 781         RETURN(0);
 782 }
 783
 784 int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 785               struct md_open_data *mod, struct ptlrpc_request **request)
 786 {
 787         struct obd_device     *obd = class_exp2obd(exp);
 788         struct ptlrpc_request *req;
 789         int                    rc;
 790         ENTRY;
 791
 792         *request = NULL;
 793         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_CLOSE);
 794         if (req == NULL)
 795                 RETURN(-ENOMEM);
 796
 797         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 798
 799         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
 800         if (rc) {
 801                 ptlrpc_request_free(req);
 802                 RETURN(rc);
 803         }
 804
 805         /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
 806          * portal whose threads are not taking any DLM locks and are therefore
 807          * always progressing */
 808         /* XXX FIXME bug 249 */
 809         req->rq_request_portal = MDS_READPAGE_PORTAL;
 810
 811         /* Ensure that this close's handle is fixed up during replay. */
 812         if (likely(mod != NULL))
 813                 list_add_tail(&req->rq_mod_list, &mod->mod_replay_list);
 814         else
 815                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 816
 817         mdc_close_pack(req, op_data);
 818         ptlrpc_request_set_replen(req);
 819         req->rq_commit_cb = mdc_commit_delayed;
 820         req->rq_replay = 1;
 821         LASSERT(req->rq_cb_data == NULL);
 822         req->rq_cb_data = mod;
 823
 824         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 825         rc = ptlrpc_queue_wait(req);
 826         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 827
 828         if (req->rq_repmsg == NULL) {
 829                 CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
 830                        req->rq_status);
 831                 if (rc == 0)
 832                         rc = req->rq_status ?: -EIO;
 833         } else if (rc == 0 || rc == -EAGAIN) {
 834                 struct mdt_body *body;
 835
 836                 rc = lustre_msg_get_status(req->rq_repmsg);
 837                 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
 838                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
 839                                   "= %d", rc);
 840                         if (rc > 0)
 841                                 rc = -rc;
 842                 } else if (mod == NULL) {
 843                         if (req->rq_import->imp_replayable)
 844                                 CERROR("Unexpected: can't find md_open_data,"
 845                                        "but close succeeded with replayable imp"
 846                                        "Please tell CFS.\n");
 847                 }
 848
 849                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 850                 if (body == NULL)
 851                         rc = -EPROTO;
 852         }
 853
 854         EXIT;
 855         if (rc != 0 && rc != -EAGAIN && req && req->rq_commit_cb)
 856                 req->rq_commit_cb(req);
 857
 858         *request = req;
 859         return rc;
 860 }
 861
 862 int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 863                      struct md_open_data *mod)
 864 {
 865         struct obd_device     *obd = class_exp2obd(exp);
 866         struct ptlrpc_request *req;
 867         int                    rc;
 868         ENTRY;
 869
 870         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 871                                    &RQF_MDS_DONE_WRITING);
 872         if (req == NULL)
 873                 RETURN(-ENOMEM);
 874
 875         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 876         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_DONE_WRITING);
 877         if (rc) {
 878                 ptlrpc_request_free(req);
 879                 RETURN(rc);
 880         }
 881
 882         /* XXX: add DONE_WRITING request to och -- when Size-on-MDS
 883          * recovery will be ready. */
 884         mdc_close_pack(req, op_data);
 885         ptlrpc_request_set_replen(req);
 886         req->rq_replay = 1;
 887         req->rq_cb_data = mod;
 888         req->rq_commit_cb = mdc_commit_delayed;
 889         if (likely(mod != NULL))
 890                 list_add_tail(&req->rq_mod_list, &mod->mod_replay_list);
 891         else
 892                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 893
 894         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 895         rc = ptlrpc_queue_wait(req);
 896         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 897
 898         /* Close the open replay sequence if an error occured or no SOM
 899          * attribute update is needed. */
 900         if (rc != -EAGAIN)
 901                 ptlrpc_close_replay_seq(req);
 902
 903         if (rc && rc != -EAGAIN && req->rq_commit_cb)
 904                 req->rq_commit_cb(req);
 905
 906         ptlrpc_req_finished(req);
 907         RETURN(rc);
 908 }
 909
 910 #ifdef HAVE_SPLIT_SUPPORT
 911 int mdc_sendpage(struct obd_export *exp, const struct lu_fid *fid,
 912                  const struct page *page, int offset)
 913 {
 914         struct ptlrpc_request   *req;
 915         struct ptlrpc_bulk_desc *desc;
 916         int                      rc;
 917         ENTRY;
 918
 919         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_WRITEPAGE);
 920         if (req == NULL)
 921                 RETURN(-ENOMEM);
 922
 923         /* FIXME: capa doesn't support split yet */
 924         mdc_set_capa_size(req, &RMF_CAPA1, NULL);
 925
 926         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_WRITEPAGE);
 927         if (rc) {
 928                 ptlrpc_request_free(req);
 929                 RETURN(rc);
 930         }
 931
 932         req->rq_request_portal = MDS_READPAGE_PORTAL;
 933
 934         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_GET_SOURCE, MDS_BULK_PORTAL);
 935         if (desc == NULL)
 936                 GOTO(out, rc = -ENOMEM);
 937
 938         /* NB req now owns desc and will free it when it gets freed. */
 939         ptlrpc_prep_bulk_page(desc, (struct page *)page, 0, offset);
 940         mdc_readdir_pack(req, 0, offset, fid, NULL);
 941
 942         ptlrpc_request_set_replen(req);
 943         rc = ptlrpc_queue_wait(req);
 944         GOTO(out, rc);
 945 out:
 946         ptlrpc_req_finished(req);
 947         return rc;
 948 }
 949 EXPORT_SYMBOL(mdc_sendpage);
 950 #endif
 951
 952 int mdc_readpage(struct obd_export *exp, const struct lu_fid *fid,
 953                  struct obd_capa *oc, __u64 offset, struct page *page,
 954                  struct ptlrpc_request **request)
 955 {
 956         struct ptlrpc_request   *req;
 957         struct ptlrpc_bulk_desc *desc;
 958         int                      rc;
 959         ENTRY;
 960
 961         *request = NULL;
 962         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
 963         if (req == NULL)
 964                 RETURN(-ENOMEM);
 965
 966         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 967
 968         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
 969         if (rc) {
 970                 ptlrpc_request_free(req);
 971                 RETURN(rc);
 972         }
 973
 974         /* XXX FIXME bug 249 */
 975         req->rq_request_portal = MDS_READPAGE_PORTAL;
 976         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_PUT_SINK, MDS_BULK_PORTAL);
 977         if (desc == NULL) {
 978                 ptlrpc_request_free(req);
 979                 RETURN(-ENOMEM);
 980         }
 981
 982         /* NB req now owns desc and will free it when it gets freed */
 983         ptlrpc_prep_bulk_page(desc, page, 0, CFS_PAGE_SIZE);
 984         mdc_readdir_pack(req, offset, CFS_PAGE_SIZE, fid, oc);
 985
 986         ptlrpc_request_set_replen(req);
 987         rc = ptlrpc_queue_wait(req);
 988         if (rc) {
 989                 ptlrpc_req_finished(req);
 990                 RETURN(rc);
 991         }
 992
 993         if (req->rq_bulk->bd_nob_transferred != CFS_PAGE_SIZE) {
 994                 CERROR("Unexpected # bytes transferred: %d (%ld expected)\n",
 995                         req->rq_bulk->bd_nob_transferred, CFS_PAGE_SIZE);
 996                 ptlrpc_req_finished(req);
 997                 RETURN(-EPROTO);
 998         }
 999
1000         *request = req;
1001         RETURN(0);
1002 }
1003
1004 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1005                          void *karg, void *uarg)
1006 {
1007         struct obd_device *obd = exp->exp_obd;
1008         struct obd_ioctl_data *data = karg;
1009         struct obd_import *imp = obd->u.cli.cl_import;
1010         struct llog_ctxt *ctxt;
1011         int rc;
1012         ENTRY;
1013
1014         if (!try_module_get(THIS_MODULE)) {
1015                 CERROR("Can't get module. Is it alive?");
1016                 return -EINVAL;
1017         }
1018         switch (cmd) {
1019         case OBD_IOC_CLIENT_RECOVER:
1020                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1);
1021                 if (rc < 0)
1022                         GOTO(out, rc);
1023                 GOTO(out, rc = 0);
1024         case IOC_OSC_SET_ACTIVE:
1025                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
1026                 GOTO(out, rc);
1027         case OBD_IOC_PARSE: {
1028                 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
1029                 rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
1030                 GOTO(out, rc);
1031         }
1032 #ifdef __KERNEL__
1033         case OBD_IOC_LLOG_INFO:
1034         case OBD_IOC_LLOG_PRINT: {
1035                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1036                 rc = llog_ioctl(ctxt, cmd, data);
1037
1038                 GOTO(out, rc);
1039         }
1040 #endif
1041         case OBD_IOC_POLL_QUOTACHECK:
1042                 rc = lquota_poll_check(quota_interface, exp,
1043                                        (struct if_quotacheck *)karg);
1044                 GOTO(out, rc);
1045         default:
1046                 CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd);
1047                 GOTO(out, rc = -ENOTTY);
1048         }
1049 out:
1050         module_put(THIS_MODULE);
1051
1052         return rc;
1053 }
1054
1055 static int do_set_info_async(struct obd_export *exp,
1056                              obd_count keylen, void *key,
1057                              obd_count vallen, void *val,
1058                              struct ptlrpc_request_set *set)
1059 {
1060         struct obd_import     *imp = class_exp2cliimp(exp);
1061         struct ptlrpc_request *req;
1062         char                  *tmp;
1063         int                    rc;
1064         ENTRY;
1065
1066         if (vallen != sizeof(int))
1067                 RETURN(-EINVAL);
1068
1069         spin_lock(&imp->imp_lock);
1070         if (*((int *)val)) {
1071                 imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
1072                 imp->imp_connect_data.ocd_connect_flags |= OBD_CONNECT_RDONLY;
1073         } else {
1074                 imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
1075                 imp->imp_connect_data.ocd_connect_flags &= ~OBD_CONNECT_RDONLY;
1076         }
1077         spin_unlock(&imp->imp_lock);
1078
1079         req = ptlrpc_request_alloc(imp, &RQF_MDS_SET_INFO);
1080         if (req == NULL)
1081                 RETURN(-ENOMEM);
1082
1083         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
1084                              RCL_CLIENT, keylen);
1085         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
1086                              RCL_CLIENT, vallen);
1087         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SET_INFO);
1088         if (rc) {
1089                 ptlrpc_request_free(req);
1090                 RETURN(rc);
1091         }
1092
1093         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1094         memcpy(tmp, key, keylen);
1095         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1096         memcpy(tmp, val, vallen);
1097
1098         ptlrpc_request_set_replen(req);
1099
1100         if (set) {
1101                 ptlrpc_set_add_req(set, req);
1102                 ptlrpc_check_set(set);
1103         } else {
1104                 rc = ptlrpc_queue_wait(req);
1105                 ptlrpc_req_finished(req);
1106         }
1107
1108         RETURN(rc);
1109 }
1110
1111 int mdc_set_info_async(struct obd_export *exp,
1112                        obd_count keylen, void *key,
1113                        obd_count vallen, void *val,
1114                        struct ptlrpc_request_set *set)
1115 {
1116         struct obd_import *imp = class_exp2cliimp(exp);
1117         int                rc = -EINVAL;
1118         ENTRY;
1119
1120         if (KEY_IS(KEY_INIT_RECOV)) {
1121                 if (vallen != sizeof(int))
1122                         RETURN(-EINVAL);
1123                 spin_lock(&imp->imp_lock);
1124                 imp->imp_initial_recov = *(int *)val;
1125                 spin_unlock(&imp->imp_lock);
1126                 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
1127                        exp->exp_obd->obd_name, imp->imp_initial_recov);
1128                 RETURN(0);
1129         }
1130         /* Turn off initial_recov after we try all backup servers once */
1131         if (KEY_IS(KEY_INIT_RECOV_BACKUP)) {
1132                 if (vallen != sizeof(int))
1133                         RETURN(-EINVAL);
1134                 spin_lock(&imp->imp_lock);
1135                 imp->imp_initial_recov_bk = *(int *)val;
1136                 if (imp->imp_initial_recov_bk)
1137                         imp->imp_initial_recov = 1;
1138                 spin_unlock(&imp->imp_lock);
1139                 CDEBUG(D_HA, "%s: set imp_initial_recov_bk = %d\n",
1140                        exp->exp_obd->obd_name, imp->imp_initial_recov_bk);
1141                 RETURN(0);
1142         }
1143         if (KEY_IS(KEY_READ_ONLY)) {
1144                 rc = do_set_info_async(exp, keylen, key, vallen, val, set);
1145                 RETURN(rc);
1146         }
1147         if (KEY_IS(KEY_FLUSH_CTX)) {
1148                 sptlrpc_import_flush_my_ctx(imp);
1149                 RETURN(0);
1150         }
1151         if (KEY_IS(KEY_MDS_CONN)) {
1152                 struct obd_import *imp = class_exp2cliimp(exp);
1153
1154                 /* mds-mds import */
1155                 spin_lock(&imp->imp_lock);
1156                 imp->imp_server_timeout = 1;
1157                 spin_unlock(&imp->imp_lock);
1158                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1159                 CDEBUG(D_OTHER|D_WARNING, "%s: timeout / 2\n", exp->exp_obd->obd_name);
1160                 RETURN(0);
1161         }
1162
1163         RETURN(rc);
1164 }
1165
1166 int mdc_get_info(struct obd_export *exp, __u32 keylen, void *key,
1167                  __u32 *vallen, void *val)
1168 {
1169         int rc = -EINVAL;
1170
1171         if (KEY_IS(KEY_MAX_EASIZE)) {
1172                 int mdsize, *max_easize;
1173
1174                 if (*vallen != sizeof(int))
1175                         RETURN(-EINVAL);
1176                 mdsize = *(int*)val;
1177                 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
1178                         exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
1179                 max_easize = val;
1180                 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
1181                 RETURN(0);
1182         }
1183         if (KEY_IS(KEY_CONN_DATA)) {
1184                 struct obd_import *imp = class_exp2cliimp(exp);
1185                 struct obd_connect_data *data = val;
1186
1187                 if (*vallen != sizeof(*data))
1188                         RETURN(-EINVAL);
1189
1190                 *data = imp->imp_connect_data;
1191                 RETURN(0);
1192         }
1193
1194         RETURN(rc);
1195 }
1196
1197 static int mdc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1198                       __u64 max_age)
1199 {
1200         struct ptlrpc_request *req;
1201         struct obd_statfs     *msfs;
1202         int                    rc;
1203         ENTRY;
1204
1205         req = ptlrpc_request_alloc_pack(obd->u.cli.cl_import, &RQF_MDS_STATFS,
1206                                         LUSTRE_MDS_VERSION, MDS_STATFS);
1207         if (req == NULL)
1208                 RETURN(-ENOMEM);
1209
1210         ptlrpc_request_set_replen(req);
1211
1212         rc = ptlrpc_queue_wait(req);
1213         if (rc) {
1214                 /* check connection error first */
1215                 if (obd->u.cli.cl_import->imp_connect_error)
1216                         rc = obd->u.cli.cl_import->imp_connect_error;
1217                 GOTO(out, rc);
1218         }
1219
1220         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1221         if (msfs == NULL)
1222                 GOTO(out, rc = -EPROTO);
1223
1224         *osfs = *msfs;
1225         EXIT;
1226 out:
1227         ptlrpc_req_finished(req);
1228         return rc;
1229 }
1230
1231 static int mdc_pin(struct obd_export *exp, const struct lu_fid *fid,
1232                    struct obd_capa *oc, struct obd_client_handle *handle,
1233                    int flags)
1234 {
1235         struct ptlrpc_request *req;
1236         struct mdt_body       *body;
1237         int                    rc;
1238         ENTRY;
1239
1240         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_PIN);
1241         if (req == NULL)
1242                 RETURN(-ENOMEM);
1243
1244         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1245
1246         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_PIN);
1247         if (rc) {
1248                 ptlrpc_request_free(req);
1249                 RETURN(rc);
1250         }
1251
1252         mdc_pack_body(req, fid, oc, 0, 0, -1, flags);
1253
1254         ptlrpc_request_set_replen(req);
1255
1256         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1257         rc = ptlrpc_queue_wait(req);
1258         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1259         if (rc) {
1260                 CERROR("Pin failed: %d\n", rc);
1261                 GOTO(err_out, rc);
1262         }
1263
1264         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1265         if (body == NULL)
1266                 GOTO(err_out, rc = -EPROTO);
1267
1268         handle->och_fh = body->handle;
1269         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
1270
1271         OBD_ALLOC_PTR(handle->och_mod);
1272         if (handle->och_mod == NULL) {
1273                 DEBUG_REQ(D_ERROR, req, "can't allocate mdc_open_data");
1274                 GOTO(err_out, rc = -ENOMEM);
1275         }
1276         /* will be dropped by unpin */
1277         CFS_INIT_LIST_HEAD(&handle->och_mod->mod_replay_list);
1278         list_add_tail(&req->rq_mod_list, &handle->och_mod->mod_replay_list);
1279
1280         RETURN(0);
1281
1282 err_out:
1283         ptlrpc_req_finished(req);
1284         RETURN(rc);
1285 }
1286
1287 static int mdc_unpin(struct obd_export *exp, struct obd_client_handle *handle,
1288                      int flag)
1289 {
1290         struct ptlrpc_request *req;
1291         struct mdt_body       *body;
1292         int                    rc;
1293         ENTRY;
1294
1295         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_UNPIN,
1296                                         LUSTRE_MDS_VERSION, MDS_UNPIN);
1297         if (req == NULL)
1298                 RETURN(-ENOMEM);
1299
1300         body = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY);
1301         body->handle = handle->och_fh;
1302         body->flags = flag;
1303
1304         ptlrpc_request_set_replen(req);
1305
1306         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1307         rc = ptlrpc_queue_wait(req);
1308         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1309
1310         if (rc != 0)
1311                 CERROR("Unpin failed: %d\n", rc);
1312
1313         ptlrpc_req_finished(req);
1314
1315         LASSERT(!list_empty(&handle->och_mod->mod_replay_list));
1316         req = list_entry(handle->och_mod->mod_replay_list.next,
1317                          typeof(*req), rq_mod_list);
1318         list_del_init(&req->rq_mod_list);
1319         ptlrpc_req_finished(req);
1320         LASSERT(list_empty(&handle->och_mod->mod_replay_list));
1321
1322         OBD_FREE(handle->och_mod, sizeof(*handle->och_mod));
1323         RETURN(rc);
1324 }
1325
1326 int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
1327              struct obd_capa *oc, struct ptlrpc_request **request)
1328 {
1329         struct ptlrpc_request *req;
1330         int                    rc;
1331         ENTRY;
1332
1333         *request = NULL;
1334         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
1335         if (req == NULL)
1336                 RETURN(-ENOMEM);
1337
1338         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1339
1340         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
1341         if (rc) {
1342                 ptlrpc_request_free(req);
1343                 RETURN(rc);
1344         }
1345
1346         mdc_pack_body(req, fid, oc, 0, 0, -1, 0);
1347
1348         ptlrpc_request_set_replen(req);
1349
1350         rc = ptlrpc_queue_wait(req);
1351         if (rc)
1352                 ptlrpc_req_finished(req);
1353         else
1354                 *request = req;
1355         RETURN(rc);
1356 }
1357
1358 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
1359                             enum obd_import_event event)
1360 {
1361         int rc = 0;
1362
1363         LASSERT(imp->imp_obd == obd);
1364
1365         switch (event) {
1366         case IMP_EVENT_DISCON: {
1367 #if 0
1368                 /* XXX Pass event up to OBDs stack. used only for FLD now */
1369                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
1370 #endif
1371                 break;
1372         }
1373         case IMP_EVENT_INACTIVE: {
1374                 struct client_obd *cli = &obd->u.cli;
1375                 /*
1376                  * Flush current sequence to make client obtain new one
1377                  * from server in case of disconnect/reconnect.
1378                  * If range is already empty then no need to flush it.
1379                  */
1380                 if (cli->cl_seq != NULL &&
1381                     !range_is_exhausted(&cli->cl_seq->lcs_space)) {
1382                         seq_client_flush(cli->cl_seq);
1383                 }
1384
1385                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
1386                 break;
1387         }
1388         case IMP_EVENT_INVALIDATE: {
1389                 struct ldlm_namespace *ns = obd->obd_namespace;
1390
1391                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
1392
1393                 break;
1394         }
1395         case IMP_EVENT_ACTIVE: {
1396                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
1397                 break;
1398         }
1399         case IMP_EVENT_OCD:
1400                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
1401                 break;
1402
1403         default:
1404                 CERROR("Unknown import event %x\n", event);
1405                 LBUG();
1406         }
1407         RETURN(rc);
1408 }
1409
1410 static int mdc_fid_init(struct obd_export *exp)
1411 {
1412         struct client_obd *cli = &exp->exp_obd->u.cli;
1413         char *prefix;
1414         int rc;
1415         ENTRY;
1416
1417         OBD_ALLOC_PTR(cli->cl_seq);
1418         if (cli->cl_seq == NULL)
1419                 RETURN(-ENOMEM);
1420
1421         OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
1422         if (prefix == NULL)
1423                 GOTO(out_free_seq, rc = -ENOMEM);
1424
1425         snprintf(prefix, MAX_OBD_NAME + 5, "srv-%s",
1426                  exp->exp_obd->obd_name);
1427
1428         /* Init client side sequence-manager */
1429         rc = seq_client_init(cli->cl_seq, exp,
1430                              LUSTRE_SEQ_METADATA,
1431                              prefix, NULL);
1432         OBD_FREE(prefix, MAX_OBD_NAME + 5);
1433         if (rc)
1434                 GOTO(out_free_seq, rc);
1435
1436         RETURN(rc);
1437 out_free_seq:
1438         OBD_FREE_PTR(cli->cl_seq);
1439         cli->cl_seq = NULL;
1440         return rc;
1441 }
1442
1443 static int mdc_fid_fini(struct obd_export *exp)
1444 {
1445         struct client_obd *cli = &exp->exp_obd->u.cli;
1446         ENTRY;
1447
1448         if (cli->cl_seq != NULL) {
1449                 seq_client_fini(cli->cl_seq);
1450                 OBD_FREE_PTR(cli->cl_seq);
1451                 cli->cl_seq = NULL;
1452         }
1453
1454         RETURN(0);
1455 }
1456
1457 int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1458                   struct md_op_data *op_data)
1459 {
1460         struct client_obd *cli = &exp->exp_obd->u.cli;
1461         struct lu_client_seq *seq = cli->cl_seq;
1462         ENTRY;
1463         RETURN(seq_client_alloc_fid(seq, fid));
1464 }
1465
1466 /* XXX This method is used only to clear current fid seq
1467  * once fld/mds insert failed */
1468 static int mdc_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
1469 {
1470         struct client_obd *cli = &exp->exp_obd->u.cli;
1471
1472         seq_client_flush(cli->cl_seq);
1473         return 0;
1474 }
1475
1476 static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
1477 {
1478         struct client_obd *cli = &obd->u.cli;
1479         struct lprocfs_static_vars lvars = { 0 };
1480         int rc;
1481         ENTRY;
1482
1483         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1484         if (!cli->cl_rpc_lock)
1485                 RETURN(-ENOMEM);
1486         mdc_init_rpc_lock(cli->cl_rpc_lock);
1487
1488         ptlrpcd_addref();
1489
1490         OBD_ALLOC(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1491         if (!cli->cl_setattr_lock)
1492                 GOTO(err_rpc_lock, rc = -ENOMEM);
1493         mdc_init_rpc_lock(cli->cl_setattr_lock);
1494
1495         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1496         if (!cli->cl_close_lock)
1497                 GOTO(err_setattr_lock, rc = -ENOMEM);
1498         mdc_init_rpc_lock(cli->cl_close_lock);
1499
1500         rc = client_obd_setup(obd, cfg);
1501         if (rc)
1502                 GOTO(err_close_lock, rc);
1503         lprocfs_mdc_init_vars(&lvars);
1504         lprocfs_obd_setup(obd, lvars.obd_vars);
1505         sptlrpc_lprocfs_cliobd_attach(obd);
1506         ptlrpc_lprocfs_register_obd(obd);
1507
1508         rc = obd_llog_init(obd, NULL, obd, 0, NULL, NULL);
1509         if (rc) {
1510                 mdc_cleanup(obd);
1511                 CERROR("failed to setup llogging subsystems\n");
1512         }
1513
1514         RETURN(rc);
1515
1516 err_close_lock:
1517         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1518 err_setattr_lock:
1519         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1520 err_rpc_lock:
1521         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1522         ptlrpcd_decref();
1523         RETURN(rc);
1524 }
1525
1526 /* Initialize the default and maximum LOV EA and cookie sizes.  This allows
1527  * us to make MDS RPCs with large enough reply buffers to hold the
1528  * maximum-sized (= maximum striped) EA and cookie without having to
1529  * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
1530 int mdc_init_ea_size(struct obd_export *exp, int easize,
1531                      int def_easize, int cookiesize)
1532 {
1533         struct obd_device *obd = exp->exp_obd;
1534         struct client_obd *cli = &obd->u.cli;
1535         ENTRY;
1536
1537         if (cli->cl_max_mds_easize < easize)
1538                 cli->cl_max_mds_easize = easize;
1539
1540         if (cli->cl_default_mds_easize < def_easize)
1541                 cli->cl_default_mds_easize = def_easize;
1542
1543         if (cli->cl_max_mds_cookiesize < cookiesize)
1544                 cli->cl_max_mds_cookiesize = cookiesize;
1545
1546         RETURN(0);
1547 }
1548
1549 static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
1550 {
1551         int rc = 0;
1552         ENTRY;
1553
1554         switch (stage) {
1555         case OBD_CLEANUP_EARLY:
1556         case OBD_CLEANUP_EXPORTS:
1557                 /* If we set up but never connected, the
1558                    client import will not have been cleaned. */
1559                 if (obd->u.cli.cl_import) {
1560                         struct obd_import *imp;
1561                         imp = obd->u.cli.cl_import;
1562                         CERROR("client import never connected\n");
1563                         ptlrpc_invalidate_import(imp);
1564                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
1565                         class_destroy_import(imp);
1566                         obd->u.cli.cl_import = NULL;
1567                 }
1568                 break;
1569         case OBD_CLEANUP_SELF_EXP:
1570                 rc = obd_llog_finish(obd, 0);
1571                 if (rc != 0)
1572                         CERROR("failed to cleanup llogging subsystems\n");
1573         case OBD_CLEANUP_OBD:
1574                 break;
1575         }
1576         RETURN(rc);
1577 }
1578
1579 static int mdc_cleanup(struct obd_device *obd)
1580 {
1581         struct client_obd *cli = &obd->u.cli;
1582
1583         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1584         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1585         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1586
1587         ptlrpc_lprocfs_unregister_obd(obd);
1588         lprocfs_obd_cleanup(obd);
1589         ptlrpcd_decref();
1590
1591         return client_obd_cleanup(obd);
1592 }
1593
1594
1595 static int mdc_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
1596                          struct obd_device *tgt, int count,
1597                          struct llog_catid *logid, struct obd_uuid *uuid)
1598 {
1599         struct llog_ctxt *ctxt;
1600         int rc;
1601         ENTRY;
1602
1603         rc = llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
1604                         &llog_client_ops);
1605         if (rc == 0) {
1606                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1607                 ctxt->loc_imp = obd->u.cli.cl_import;
1608         }
1609
1610         rc = llog_setup(obd, llogs, LLOG_LOVEA_REPL_CTXT, tgt, 0, NULL,
1611                        &llog_client_ops);
1612         if (rc == 0) {
1613                 ctxt = llog_get_context(obd, LLOG_LOVEA_REPL_CTXT);
1614                 ctxt->loc_imp = obd->u.cli.cl_import;
1615         }
1616
1617         RETURN(rc);
1618 }
1619
1620 static int mdc_llog_finish(struct obd_device *obd, int count)
1621 {
1622         int rc;
1623         ENTRY;
1624
1625         rc = llog_cleanup(llog_get_context(obd, LLOG_LOVEA_REPL_CTXT));
1626         if (rc) {
1627                 CERROR("can not cleanup LLOG_CONFIG_REPL_CTXT rc %d\n", rc);
1628         }
1629         rc = llog_cleanup(llog_get_context(obd, LLOG_CONFIG_REPL_CTXT));
1630         RETURN(rc);
1631 }
1632
1633 static int mdc_process_config(struct obd_device *obd, obd_count len, void *buf)
1634 {
1635         struct lustre_cfg *lcfg = buf;
1636         struct lprocfs_static_vars lvars = { 0 };
1637         int rc = 0;
1638
1639         lprocfs_mdc_init_vars(&lvars);
1640
1641         switch (lcfg->lcfg_command) {
1642         case LCFG_SPTLRPC_CONF:
1643                 rc = sptlrpc_cliobd_process_config(obd, lcfg);
1644                 break;
1645         default:
1646                 rc = class_process_proc_param(PARAM_MDC, lvars.obd_vars,
1647                                               lcfg, obd);
1648                 break;
1649         }
1650         return(rc);
1651 }
1652
1653
1654 /* get remote permission for current user on fid */
1655 int mdc_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
1656                         struct obd_capa *oc, __u32 suppgid,
1657                         struct ptlrpc_request **request)
1658 {
1659         struct ptlrpc_request  *req;
1660         int                    rc;
1661         ENTRY;
1662
1663         *request = NULL;
1664         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
1665         if (req == NULL)
1666                 RETURN(-ENOMEM);
1667
1668         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1669
1670         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
1671         if (rc) {
1672                 ptlrpc_request_free(req);
1673                 RETURN(rc);
1674         }
1675
1676         mdc_pack_body(req, fid, oc, OBD_MD_FLRMTPERM, 0, suppgid, 0);
1677
1678         ptlrpc_request_set_replen(req);
1679
1680         rc = ptlrpc_queue_wait(req);
1681         if (rc)
1682                 ptlrpc_req_finished(req);
1683         else
1684                 *request = req;
1685         RETURN(rc);
1686 }
1687
1688 static int mdc_interpret_renew_capa(struct ptlrpc_request *req, void *unused,
1689                                     int status)
1690 {
1691         struct obd_capa *oc = req->rq_async_args.pointer_arg[0];
1692         renew_capa_cb_t cb = req->rq_async_args.pointer_arg[1];
1693         struct mdt_body *body = NULL;
1694         struct lustre_capa *capa;
1695         ENTRY;
1696
1697         if (status)
1698                 GOTO(out, capa = ERR_PTR(status));
1699
1700         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1701         if (body == NULL)
1702                 GOTO(out, capa = ERR_PTR(-EFAULT));
1703
1704         if ((body->valid & OBD_MD_FLOSSCAPA) == 0)
1705                 GOTO(out, capa = ERR_PTR(-ENOENT));
1706
1707         capa = req_capsule_server_get(&req->rq_pill, &RMF_CAPA2);
1708         if (!capa)
1709                 GOTO(out, capa = ERR_PTR(-EFAULT));
1710         EXIT;
1711 out:
1712         cb(oc, capa);
1713         return 0;
1714 }
1715
1716 static int mdc_renew_capa(struct obd_export *exp, struct obd_capa *oc,
1717                           renew_capa_cb_t cb)
1718 {
1719         struct ptlrpc_request *req;
1720         ENTRY;
1721
1722         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_GETATTR,
1723                                         LUSTRE_MDS_VERSION, MDS_GETATTR);
1724         if (req == NULL)
1725                 RETURN(-ENOMEM);
1726
1727         /* NB, OBD_MD_FLOSSCAPA is set here, but it doesn't necessarily mean the
1728          * capa to renew is oss capa.
1729          */
1730         mdc_pack_body(req, &oc->c_capa.lc_fid, oc, OBD_MD_FLOSSCAPA, 0, -1, 0);
1731         ptlrpc_request_set_replen(req);
1732
1733         req->rq_async_args.pointer_arg[0] = oc;
1734         req->rq_async_args.pointer_arg[1] = cb;
1735         req->rq_interpret_reply = mdc_interpret_renew_capa;
1736         ptlrpcd_add_req(req);
1737         RETURN(0);
1738 }
1739
1740 static int mdc_connect(const struct lu_env *env,
1741                        struct lustre_handle *dlm_handle,
1742                        struct obd_device *obd, struct obd_uuid *cluuid,
1743                        struct obd_connect_data *data)
1744 {
1745         struct obd_import *imp = obd->u.cli.cl_import;
1746
1747         /* mds-mds import features */
1748         if (data && (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS)) {
1749                 spin_lock(&imp->imp_lock);
1750                 imp->imp_server_timeout = 1;
1751                 spin_unlock(&imp->imp_lock);
1752                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1753                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
1754                        obd->obd_name);
1755         }
1756
1757         return client_connect_import(env, dlm_handle, obd, cluuid, data);
1758 }
1759
1760 struct obd_ops mdc_obd_ops = {
1761         .o_owner            = THIS_MODULE,
1762         .o_setup            = mdc_setup,
1763         .o_precleanup       = mdc_precleanup,
1764         .o_cleanup          = mdc_cleanup,
1765         .o_add_conn         = client_import_add_conn,
1766         .o_del_conn         = client_import_del_conn,
1767         .o_connect          = mdc_connect,
1768         .o_disconnect       = client_disconnect_export,
1769         .o_iocontrol        = mdc_iocontrol,
1770         .o_set_info_async   = mdc_set_info_async,
1771         .o_statfs           = mdc_statfs,
1772         .o_pin              = mdc_pin,
1773         .o_unpin            = mdc_unpin,
1774         .o_fid_init         = mdc_fid_init,
1775         .o_fid_fini         = mdc_fid_fini,
1776         .o_fid_alloc        = mdc_fid_alloc,
1777         .o_fid_delete       = mdc_fid_delete,
1778         .o_import_event     = mdc_import_event,
1779         .o_llog_init        = mdc_llog_init,
1780         .o_llog_finish      = mdc_llog_finish,
1781         .o_get_info         = mdc_get_info,
1782         .o_process_config  = mdc_process_config,
1783 };
1784
1785 struct md_ops mdc_md_ops = {
1786         .m_getstatus        = mdc_getstatus,
1787         .m_change_cbdata    = mdc_change_cbdata,
1788         .m_close            = mdc_close,
1789         .m_create           = mdc_create,
1790         .m_done_writing     = mdc_done_writing,
1791         .m_enqueue          = mdc_enqueue,
1792         .m_getattr          = mdc_getattr,
1793         .m_getattr_name     = mdc_getattr_name,
1794         .m_intent_lock      = mdc_intent_lock,
1795         .m_link             = mdc_link,
1796         .m_is_subdir        = mdc_is_subdir,
1797         .m_rename           = mdc_rename,
1798         .m_setattr          = mdc_setattr,
1799         .m_setxattr         = mdc_setxattr,
1800         .m_getxattr         = mdc_getxattr,
1801         .m_sync             = mdc_sync,
1802         .m_readpage         = mdc_readpage,
1803         .m_unlink           = mdc_unlink,
1804         .m_cancel_unused    = mdc_cancel_unused,
1805         .m_init_ea_size     = mdc_init_ea_size,
1806         .m_set_lock_data    = mdc_set_lock_data,
1807         .m_lock_match       = mdc_lock_match,
1808         .m_get_lustre_md    = mdc_get_lustre_md,
1809         .m_free_lustre_md   = mdc_free_lustre_md,
1810         .m_set_open_replay_data = mdc_set_open_replay_data,
1811         .m_clear_open_replay_data = mdc_clear_open_replay_data,
1812         .m_get_remote_perm  = mdc_get_remote_perm,
1813         .m_renew_capa       = mdc_renew_capa
1814 };
1815
1816 extern quota_interface_t mdc_quota_interface;
1817
1818 int __init mdc_init(void)
1819 {
1820         int rc;
1821         struct lprocfs_static_vars lvars = { 0 };
1822         lprocfs_mdc_init_vars(&lvars);
1823
1824         request_module("lquota");
1825         quota_interface = PORTAL_SYMBOL_GET(mdc_quota_interface);
1826         init_obd_quota_ops(quota_interface, &mdc_obd_ops);
1827
1828         rc = class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
1829                                  LUSTRE_MDC_NAME, NULL);
1830         if (rc && quota_interface)
1831                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1832
1833         RETURN(rc);
1834 }
1835
1836 #ifdef __KERNEL__
1837 static void /*__exit*/ mdc_exit(void)
1838 {
1839         if (quota_interface)
1840                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1841
1842         class_unregister_type(LUSTRE_MDC_NAME);
1843 }
1844
1845 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1846 MODULE_DESCRIPTION("Lustre Metadata Client");
1847 MODULE_LICENSE("GPL");
1848
1849 module_init(mdc_init);
1850 module_exit(mdc_exit);
1851 #endif