lustre/mdc/mdc_request.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2001-2003 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of the Lustre file system, http://www.lustre.org
   7  *   Lustre is a trademark of Cluster File Systems, Inc.
   8  *
   9  *   You may have signed or agreed to another license before downloading
  10  *   this software.  If so, you are bound by the terms and conditions
  11  *   of that agreement, and the following does not apply to you.  See the
  12  *   LICENSE file included with this distribution for more information.
  13  *
  14  *   If you did not agree to a different license, then this copy of Lustre
  15  *   is open source software; you can redistribute it and/or modify it
  16  *   under the terms of version 2 of the GNU General Public License as
  17  *   published by the Free Software Foundation.
  18  *
  19  *   In either case, Lustre is distributed in the hope that it will be
  20  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  21  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *   license text for more details.
  23  */
  24
  25 #ifndef EXPORT_SYMTAB
  26 # define EXPORT_SYMTAB
  27 #endif
  28 #define DEBUG_SUBSYSTEM S_MDC
  29
  30 #ifdef __KERNEL__
  31 # include <linux/module.h>
  32 # include <linux/pagemap.h>
  33 # include <linux/miscdevice.h>
  34 # include <linux/init.h>
  35 #else
  36 # include <liblustre.h>
  37 #endif
  38
  39 #include <linux/lustre_acl.h>
  40 #include <obd_class.h>
  41 #include <lustre_dlm.h>
  42 #include <lustre_fid.h>
  43 #include <md_object.h>
  44 #include <lprocfs_status.h>
  45 #include <lustre_param.h>
  46 #include "mdc_internal.h"
  47
  48 static quota_interface_t *quota_interface;
  49
  50 #define REQUEST_MINOR 244
  51
  52 static quota_interface_t *quota_interface;
  53 extern quota_interface_t mdc_quota_interface;
  54
  55 static int mdc_cleanup(struct obd_device *obd);
  56
  57 static struct obd_capa *mdc_unpack_capa(struct ptlrpc_request *req,
  58                                                unsigned int offset)
  59 {
  60         struct lustre_capa *capa;
  61         struct obd_capa *oc;
  62
  63         /* swabbed already in mdc_enqueue */
  64         capa = lustre_msg_buf(req->rq_repmsg, offset, sizeof(*capa));
  65         if (capa == NULL) {
  66                 CERROR("missing capa at offset %d failed!\n", offset);
  67                 return ERR_PTR(-EFAULT);
  68         }
  69
  70         oc = alloc_capa(CAPA_SITE_CLIENT);
  71         if (!oc) {
  72                 CERROR("alloc capa failed!\n");
  73                 return ERR_PTR(-ENOMEM);
  74         }
  75         oc->c_capa = *capa;
  76
  77         return oc;
  78 }
  79
  80 /* Helper that implements most of mdc_getstatus and signal_completed_replay. */
  81 /* XXX this should become mdc_get_info("key"), sending MDS_GET_INFO RPC */
  82 static int send_getstatus(struct obd_import *imp, struct lu_fid *rootfid,
  83                           struct obd_capa **pc, int level, int msg_flags)
  84 {
  85         struct ptlrpc_request *req;
  86         struct mdt_body *body;
  87         int rc, size[3] = { sizeof(struct ptlrpc_body),
  88                             sizeof(*body),
  89                             sizeof(struct lustre_capa) };
  90         ENTRY;
  91
  92         req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_GETSTATUS, 2, size,
  93                               NULL);
  94         if (!req)
  95                 GOTO(out, rc = -ENOMEM);
  96
  97         req->rq_send_state = level;
  98         ptlrpc_req_set_repsize(req, 3, size);
  99
 100         mdc_pack_req_body(req, REQ_REC_OFF, 0, NULL, NULL, 0, 0);
 101         lustre_msg_add_flags(req->rq_reqmsg, msg_flags);
 102         rc = ptlrpc_queue_wait(req);
 103
 104         if (!rc) {
 105                 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
 106                                           lustre_swab_mdt_body);
 107                 if (body == NULL) {
 108                         CERROR ("Can't extract mdt_body\n");
 109                         GOTO (out, rc = -EPROTO);
 110                 }
 111
 112                 *rootfid = body->fid1;
 113
 114                 if (body->valid & OBD_MD_FLMDSCAPA) {
 115                         struct obd_capa *oc;
 116
 117                         oc = mdc_unpack_capa(req, REPLY_REC_OFF + 1);
 118                         if (IS_ERR(oc))
 119                                 GOTO(out, rc = PTR_ERR(oc));
 120                         *pc = oc;
 121                 }
 122
 123                 CDEBUG(D_NET, "root fid="DFID", last_committed="LPU64
 124                        ", last_xid="LPU64"\n",
 125                        PFID(rootfid),
 126                        lustre_msg_get_last_committed(req->rq_repmsg),
 127                        lustre_msg_get_last_xid(req->rq_repmsg));
 128         }
 129
 130         EXIT;
 131  out:
 132         ptlrpc_req_finished(req);
 133         return rc;
 134 }
 135
 136 /* This should be mdc_get_info("rootfid") */
 137 int mdc_getstatus(struct obd_export *exp, struct lu_fid *rootfid,
 138                   struct obd_capa **pc)
 139 {
 140         return send_getstatus(class_exp2cliimp(exp), rootfid, pc,
 141                               LUSTRE_IMP_FULL, 0);
 142 }
 143
 144 /*
 145  * This function now is known to always saying that it will receive 4 buffers
 146  * from server. Even for cases when acl_size and md_size is zero, RPC header
 147  * willcontain 4 fields and RPC itself will contain zero size fields. This is
 148  * because mdt_getattr*() _always_ returns 4 fields, but if acl is not needed
 149  * and thus zero, it shirinks it, making zero size. The same story about
 150  * md_size. And this is course of problem when client waits for smaller number
 151  * of fields. This issue will be fixed later when client gets awar of RPC
 152  * layouts.  --umka
 153  */
 154 static int mdc_getattr_common(struct obd_export *exp, unsigned int ea_size,
 155                               unsigned int acl_size, int mdscapa,
 156                               struct ptlrpc_request *req)
 157 {
 158         struct mdt_body *body;
 159         void *eadata;
 160         int size[5] = { sizeof(struct ptlrpc_body),
 161                         sizeof(*body),
 162                         ea_size,
 163                         acl_size,
 164                         sizeof(struct lustre_capa) };
 165         int offset, rc;
 166         ENTRY;
 167
 168         /* Request message already built. */
 169         if (ea_size)
 170                 CDEBUG(D_INODE, "reserved %u bytes for MD/symlink in packet\n",
 171                        ea_size);
 172         if (acl_size)
 173                 CDEBUG(D_INODE, "reserved %u bytes for ACL\n", acl_size);
 174
 175         ptlrpc_req_set_repsize(req, 5, size);
 176
 177         rc = ptlrpc_queue_wait(req);
 178         if (rc != 0)
 179                 RETURN (rc);
 180
 181         body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
 182                                   lustre_swab_mdt_body);
 183         if (body == NULL) {
 184                 CERROR ("Can't unpack mdt_body\n");
 185                 RETURN (-EPROTO);
 186         }
 187
 188         CDEBUG(D_NET, "mode: %o\n", body->mode);
 189
 190         offset = REPLY_REC_OFF + 1;
 191         lustre_set_rep_swabbed(req, offset);
 192         if (body->eadatasize != 0) {
 193                 /* reply indicates presence of eadata; check it's there... */
 194                 eadata = lustre_msg_buf(req->rq_repmsg, offset++,
 195                                         body->eadatasize);
 196                 if (eadata == NULL) {
 197                         CERROR ("Missing/short eadata\n");
 198                         RETURN (-EPROTO);
 199                 }
 200         }
 201
 202         if (body->valid & OBD_MD_FLMODEASIZE) {
 203                 struct client_obd *cli = &exp->exp_obd->u.cli;
 204
 205                 if (cli->cl_max_mds_easize < body->max_mdsize)
 206                         cli->cl_max_mds_easize = body->max_mdsize;
 207                 if (cli->cl_max_mds_cookiesize < body->max_cookiesize)
 208                         cli->cl_max_mds_cookiesize = body->max_cookiesize;
 209         }
 210
 211         offset += !!body->aclsize;
 212
 213         if (body->valid & OBD_MD_FLMDSCAPA) {
 214                 struct lustre_capa *capa;
 215
 216                 LASSERT(mdscapa);
 217                 capa = lustre_unpack_capa(req->rq_repmsg, offset++);
 218                 if (capa == NULL) {
 219                         CERROR("Missing/short client MDS capability\n");
 220                         RETURN(-EPROTO);
 221                 }
 222         }
 223
 224         RETURN (0);
 225 }
 226
 227 int mdc_getattr(struct obd_export *exp, const struct lu_fid *fid,
 228                 struct obd_capa *oc, obd_valid valid, int ea_size,
 229                 struct ptlrpc_request **request)
 230 {
 231         struct ptlrpc_request *req;
 232         int size[3] = { sizeof(struct ptlrpc_body), sizeof(struct mdt_body) };
 233         int acl_size = 0, rc;
 234         ENTRY;
 235
 236         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
 237
 238         /*
 239          * XXX: Do we need to make another request here?  We just did a getattr
 240          * to do the lookup in the first place.
 241          */
 242         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 243                               MDS_GETATTR, 3, size, NULL);
 244         if (!req)
 245                 GOTO(out, rc = -ENOMEM);
 246
 247         mdc_pack_req_body(req, REQ_REC_OFF, valid, fid, oc, ea_size,
 248                           MDS_BFLAG_EXT_FLAGS/*request "new" flags(bug 9486)*/);
 249
 250         if (valid & OBD_MD_FLRMTPERM)
 251                 acl_size = sizeof(struct mdt_remote_perm);
 252
 253         /* Currently only root inode will call us with FLACL */
 254         else if (valid & OBD_MD_FLACL)
 255                 acl_size = LUSTRE_POSIX_ACL_MAX_SIZE;
 256
 257         rc = mdc_getattr_common(exp, ea_size, acl_size,
 258                                 !!(valid & OBD_MD_FLMDSCAPA), req);
 259         if (rc != 0) {
 260                 ptlrpc_req_finished (req);
 261                 req = NULL;
 262         }
 263  out:
 264         *request = req;
 265         RETURN (rc);
 266 }
 267
 268 int mdc_getattr_name(struct obd_export *exp, const struct lu_fid *fid,
 269                      struct obd_capa *oc, const char *filename, int namelen,
 270                      obd_valid valid, int ea_size,
 271                      struct ptlrpc_request **request)
 272 {
 273         struct ptlrpc_request *req;
 274         struct mdt_body *body;
 275         int size[4] = { sizeof(struct ptlrpc_body), sizeof(*body), 0, namelen};
 276         int rc;
 277         ENTRY;
 278
 279         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
 280
 281         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 282                               MDS_GETATTR_NAME, 4, size, NULL);
 283         if (!req)
 284                 GOTO(out, rc = -ENOMEM);
 285
 286         mdc_pack_req_body(req, REQ_REC_OFF, valid, fid, oc, ea_size,
 287                           MDS_BFLAG_EXT_FLAGS/*request "new" flags(bug 9486)*/);
 288
 289         if (filename) {
 290                 LASSERT(strnlen(filename, namelen) == namelen - 1);
 291                 memcpy(lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF + 2, namelen),
 292                        filename, namelen);
 293         }
 294
 295         rc = mdc_getattr_common(exp, ea_size, 0, !!(valid & OBD_MD_FLMDSCAPA),
 296                                 req);
 297         if (rc != 0) {
 298                 ptlrpc_req_finished (req);
 299                 req = NULL;
 300         }
 301  out:
 302         *request = req;
 303         RETURN(rc);
 304 }
 305
 306 static int mdc_is_subdir(struct obd_export *exp, const struct lu_fid *pfid,
 307                          const struct lu_fid *cfid, struct ptlrpc_request **request)
 308 {
 309         int size[2] = { sizeof(struct ptlrpc_body),
 310                         sizeof(struct mdt_body) };
 311         struct ptlrpc_request *req;
 312         struct mdt_body *body;
 313         int rc;
 314         ENTRY;
 315
 316         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 317                               MDS_IS_SUBDIR, 2, size, NULL);
 318         if (!req)
 319                 GOTO(out, rc = -ENOMEM);
 320
 321         mdc_is_subdir_pack(req, REQ_REC_OFF, pfid, cfid, 0);
 322
 323         ptlrpc_req_set_repsize(req, 2, size);
 324         rc = ptlrpc_queue_wait(req);
 325         if (rc != 0 && rc != -EREMOTE)
 326                 GOTO(out, rc);
 327
 328         body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
 329                                   lustre_swab_mdt_body);
 330         if (body == NULL) {
 331                 CERROR ("Can't unpack mdt_body\n");
 332                 GOTO(out, rc = -EPROTO);
 333         }
 334         EXIT;
 335  out:
 336         *request = req;
 337         return rc;
 338 }
 339
 340 static
 341 int mdc_xattr_common(struct obd_export *exp, const struct lu_fid *fid,
 342                      struct obd_capa *oc,
 343                      int opcode, obd_valid valid, const char *xattr_name,
 344                      const char *input, int input_size, int output_size,
 345                      int flags, struct ptlrpc_request **request)
 346 {
 347         struct ptlrpc_request *req;
 348         int size[5] = { sizeof(struct ptlrpc_body), sizeof(struct mdt_body) };
 349         int bufcnt = 3, offset = REQ_REC_OFF + 2;
 350         int rc, xattr_namelen = 0, remote_acl = 0;
 351         void *tmp;
 352         ENTRY;
 353
 354         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
 355         if (xattr_name) {
 356                 xattr_namelen = strlen(xattr_name) + 1;
 357                 size[bufcnt++] = xattr_namelen;
 358         }
 359         if (input_size) {
 360                 LASSERT(input);
 361                 size[bufcnt++] = input_size;
 362         }
 363
 364         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 365                               opcode, bufcnt, size, NULL);
 366         if (!req)
 367                 GOTO(out, rc = -ENOMEM);
 368
 369         /* request data */
 370         mdc_pack_req_body(req, REQ_REC_OFF, valid, fid, oc, output_size, flags);
 371
 372
 373         if (xattr_name) {
 374                 tmp = lustre_msg_buf(req->rq_reqmsg, offset++, xattr_namelen);
 375                 memcpy(tmp, xattr_name, xattr_namelen);
 376                 if (!strcmp(xattr_name, XATTR_NAME_LUSTRE_ACL))
 377                         remote_acl = 1;
 378         }
 379         if (input_size) {
 380                 tmp = lustre_msg_buf(req->rq_reqmsg, offset++, input_size);
 381                 memcpy(tmp, input, input_size);
 382         }
 383
 384         /* reply buffers */
 385         if (opcode == MDS_GETXATTR) {
 386                 size[REPLY_REC_OFF] = sizeof(struct mdt_body);
 387                 bufcnt = 2;
 388         } else {
 389                 bufcnt = 1;
 390         }
 391
 392         /* we do this even output_size is 0, because server is doing that */
 393         size[bufcnt++] = output_size;
 394         ptlrpc_req_set_repsize(req, bufcnt, size);
 395
 396         /* make rpc */
 397         /* NB: set remote acl doesn't need hold rpc lock, because it just
 398          * send command to MDS, and when it's executed on mountpoint on MDS,
 399          * another mdc_xattr_common() will be invoked there. */
 400         if (opcode == MDS_SETXATTR && !remote_acl)
 401                 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 402
 403         rc = ptlrpc_queue_wait(req);
 404
 405         if (opcode == MDS_SETXATTR && !remote_acl)
 406                 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 407
 408         if (rc != 0)
 409                 GOTO(err_out, rc);
 410
 411         if (opcode == MDS_GETXATTR) {
 412                 struct mdt_body * body = lustre_swab_repbuf(req, REPLY_REC_OFF,
 413                                           sizeof(*body), lustre_swab_mdt_body);
 414                 if (body == NULL) {
 415                         CERROR ("Can't unpack mdt_body\n");
 416                         GOTO(err_out, rc = -EPROTO);
 417                 }
 418         }
 419 out:
 420         *request = req;
 421         RETURN (rc);
 422 err_out:
 423         ptlrpc_req_finished(req);
 424         req = NULL;
 425         goto out;
 426 }
 427
 428 int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
 429                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 430                  const char *input, int input_size, int output_size, int flags,
 431                  struct ptlrpc_request **request)
 432 {
 433         return mdc_xattr_common(exp, fid, oc, MDS_SETXATTR, valid, xattr_name,
 434                                 input, input_size, output_size, flags, request);
 435 }
 436
 437 int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
 438                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 439                  const char *input, int input_size, int output_size, int flags,
 440                  struct ptlrpc_request **request)
 441 {
 442         return mdc_xattr_common(exp, fid, oc, MDS_GETXATTR, valid, xattr_name,
 443                                 input, input_size, output_size, flags, request);
 444 }
 445
 446 #ifdef CONFIG_FS_POSIX_ACL
 447 static
 448 int mdc_unpack_acl(struct obd_export *exp, struct ptlrpc_request *req,
 449                    struct lustre_md *md, unsigned int offset)
 450 {
 451         struct mdt_body  *body = md->body;
 452         struct posix_acl *acl;
 453         void             *buf;
 454         int               rc;
 455
 456         if (!body->aclsize)
 457                 return 0;
 458
 459         buf = lustre_msg_buf(req->rq_repmsg, offset, body->aclsize);
 460         if (!buf) {
 461                 CERROR("aclsize %u, bufcount %u, bufsize %u\n",
 462                        body->aclsize, lustre_msg_bufcount(req->rq_repmsg),
 463                        (lustre_msg_bufcount(req->rq_repmsg) <= offset) ?
 464                                 -1 : lustre_msg_buflen(req->rq_repmsg, offset));
 465                 return -EPROTO;
 466         }
 467
 468         acl = posix_acl_from_xattr(buf, body->aclsize);
 469         if (IS_ERR(acl)) {
 470                 rc = PTR_ERR(acl);
 471                 CERROR("convert xattr to acl: %d\n", rc);
 472                 return rc;
 473         }
 474
 475         rc = posix_acl_valid(acl);
 476         if (rc) {
 477                 CERROR("validate acl: %d\n", rc);
 478                 posix_acl_release(acl);
 479                 return rc;
 480         }
 481
 482         md->posix_acl = acl;
 483         return 0;
 484 }
 485 #else
 486 #define mdc_unpack_acl(exp, req, md, offset) 0
 487 #endif
 488
 489 int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
 490                       int offset, struct obd_export *dt_exp,
 491                       struct obd_export *md_exp,
 492                       struct lustre_md *md)
 493 {
 494         int rc;
 495         ENTRY;
 496
 497         LASSERT(md);
 498         memset(md, 0, sizeof(*md));
 499
 500         md->body = lustre_msg_buf(req->rq_repmsg, offset, sizeof (*md->body));
 501         LASSERT (md->body != NULL);
 502         LASSERT(lustre_rep_swabbed(req, offset));
 503         offset++;
 504
 505         if (md->body->valid & OBD_MD_FLEASIZE) {
 506                 int lmmsize;
 507                 struct lov_mds_md *lmm;
 508
 509                 if (!S_ISREG(md->body->mode)) {
 510                         CERROR("OBD_MD_FLEASIZE set, should be a regular file, "
 511                                "but is not\n");
 512                         GOTO(out, rc = -EPROTO);
 513                 }
 514
 515                 if (md->body->eadatasize == 0) {
 516                         CERROR("OBD_MD_FLEASIZE set, but eadatasize 0\n");
 517                         GOTO(out, rc = -EPROTO);
 518                 }
 519                 lmmsize = md->body->eadatasize;
 520                 lmm = lustre_msg_buf(req->rq_repmsg, offset, lmmsize);
 521                 if (!lmm) {
 522                         CERROR ("incorrect message: lmm == 0\n");
 523                         GOTO(out, rc = -EPROTO);
 524                 }
 525                 LASSERT(lustre_rep_swabbed(req, offset));
 526
 527                 rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize);
 528                 if (rc < 0)
 529                         GOTO(out, rc);
 530
 531                 if (rc < sizeof(*md->lsm)) {
 532                         CERROR ("lsm size too small:  rc < sizeof (*md->lsm) "
 533                                 "(%d < %d)\n", rc, sizeof(*md->lsm));
 534                         GOTO(out, rc = -EPROTO);
 535                 }
 536
 537                 offset++;
 538         } else if (md->body->valid & OBD_MD_FLDIREA) {
 539                 int lmvsize;
 540                 struct lov_mds_md *lmv;
 541
 542                 if(!S_ISDIR(md->body->mode)) {
 543                         CERROR("OBD_MD_FLDIREA set, should be a directory, but "
 544                                "is not\n");
 545                         GOTO(out, rc = -EPROTO);
 546                 }
 547
 548                 if (md->body->eadatasize == 0) {
 549                         CERROR("OBD_MD_FLDIREA is set, but eadatasize 0\n");
 550                         RETURN(-EPROTO);
 551                 }
 552                 if (md->body->valid & OBD_MD_MEA) {
 553                         lmvsize = md->body->eadatasize;
 554                         lmv = lustre_msg_buf(req->rq_repmsg, offset, lmvsize);
 555                         if (!lmv) {
 556                                 CERROR ("incorrect message: lmv == 0\n");
 557                                 GOTO(out, rc = -EPROTO);
 558                         }
 559
 560                         LASSERT(lustre_rep_swabbed(req, offset));
 561
 562                         rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
 563                                           lmvsize);
 564                         if (rc < 0)
 565                                 GOTO(out, rc);
 566
 567                         if (rc < sizeof(*md->mea)) {
 568                                 CERROR ("size too small:  rc < sizeof(*md->mea) "
 569                                         "(%d < %d)\n", rc, sizeof(*md->mea));
 570                                 GOTO(out, rc = -EPROTO);
 571                         }
 572                 }
 573                 offset++;
 574         }
 575         rc = 0;
 576
 577         /* remote permission */
 578         if (md->body->valid & OBD_MD_FLRMTPERM) {
 579                 md->remote_perm = lustre_msg_buf(req->rq_repmsg, offset++,
 580                                                 sizeof(struct mdt_remote_perm));
 581                 if (!md->remote_perm) {
 582                         CERROR ("incorrect message: remote_perm == 0\n");
 583                         GOTO(out, rc = -EPROTO);
 584                 }
 585         }
 586
 587         /* for ACL, it's possible that FLACL is set but aclsize is zero.  only
 588          * when aclsize != 0 there's an actual segment for ACL in reply
 589          * buffer. */
 590         else if (md->body->valid & OBD_MD_FLACL) {
 591                 if (md->body->aclsize) {
 592                         rc = mdc_unpack_acl(dt_exp, req, md, offset++);
 593                         if (rc)
 594                                 GOTO(out, rc);
 595 #ifdef CONFIG_FS_POSIX_ACL
 596                 } else {
 597                         md->posix_acl = NULL;
 598 #endif
 599                 }
 600         }
 601
 602         if (md->body->valid & OBD_MD_FLMDSCAPA) {
 603                 struct obd_capa *oc = mdc_unpack_capa(req, offset++);
 604
 605                 if (IS_ERR(oc))
 606                         GOTO(out, rc = PTR_ERR(oc));
 607                 md->mds_capa = oc;
 608         }
 609
 610         if (md->body->valid & OBD_MD_FLOSSCAPA) {
 611                 struct obd_capa *oc = mdc_unpack_capa(req, offset++);
 612
 613                 if (IS_ERR(oc))
 614                         GOTO(out, rc = PTR_ERR(oc));
 615                 md->oss_capa = oc;
 616         }
 617
 618         EXIT;
 619 out:
 620         if (rc) {
 621                 if (md->oss_capa)
 622                         free_capa(md->oss_capa);
 623                 if (md->mds_capa)
 624                         free_capa(md->mds_capa);
 625 #ifdef CONFIG_FS_POSIX_ACL
 626                 posix_acl_release(md->posix_acl);
 627 #endif
 628                 if (md->lsm)
 629                         obd_free_memmd(dt_exp, &md->lsm);
 630         }
 631         return rc;
 632 }
 633
 634 int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
 635 {
 636         ENTRY;
 637         RETURN(0);
 638 }
 639
 640 static void mdc_replay_open(struct ptlrpc_request *req)
 641 {
 642         struct md_open_data *mod = req->rq_cb_data;
 643         struct ptlrpc_request *cur, *tmp;
 644         struct obd_client_handle *och;
 645         struct lustre_handle old;
 646         struct mdt_body *body;
 647         ENTRY;
 648
 649         if (mod == NULL) {
 650                 DEBUG_REQ(D_ERROR, req,
 651                           "Can't properly replay without open data.");
 652                 EXIT;
 653                 return;
 654         }
 655
 656         body = lustre_swab_repbuf(req, DLM_REPLY_REC_OFF, sizeof(*body),
 657                                   lustre_swab_mdt_body);
 658         LASSERT(body != NULL);
 659
 660         och = mod->mod_och;
 661         if (och != NULL) {
 662                 struct lustre_handle *file_fh;
 663
 664                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 665
 666                 file_fh = &och->och_fh;
 667                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 668                        file_fh->cookie, body->handle.cookie);
 669                 old = *file_fh;
 670                 *file_fh = body->handle;
 671         }
 672
 673         list_for_each_entry_safe(cur, tmp, &mod->mod_replay_list, rq_mod_list) {
 674                 int opc = lustre_msg_get_opc(cur->rq_reqmsg);
 675                 struct mdt_epoch *epoch = NULL;
 676
 677                 if (opc == MDS_CLOSE || opc == MDS_DONE_WRITING) {
 678                         epoch = lustre_msg_buf(cur->rq_reqmsg,
 679                                                REQ_REC_OFF, sizeof(*epoch));
 680                         LASSERT(epoch);
 681                         DEBUG_REQ(D_HA, cur, "updating %s body with new fh",
 682                                   opc == MDS_CLOSE ? "CLOSE" : "DONE_WRITING");
 683                 } else if (opc == MDS_REINT) {
 684                         struct mdt_rec_setattr *rec;
 685
 686                         /* Check this is REINT_SETATTR. */
 687                         rec = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF,
 688                                              sizeof (*rec));
 689                         LASSERT(rec && rec->sa_opcode == REINT_SETATTR);
 690
 691                         epoch = lustre_msg_buf(cur->rq_reqmsg,
 692                                                REQ_REC_OFF + 2, sizeof(*epoch));
 693                         LASSERT(epoch);
 694                         DEBUG_REQ(D_HA, cur, "updating REINT_SETATTR body "
 695                                   "with new fh");
 696                 }
 697                 if (epoch) {
 698                         if (och != NULL)
 699                                 LASSERT(!memcmp(&old, &epoch->handle,
 700                                                 sizeof(old)));
 701                         epoch->handle = body->handle;
 702                 }
 703         }
 704         EXIT;
 705 }
 706
 707 void mdc_commit_delayed(struct ptlrpc_request *req)
 708 {
 709         struct md_open_data *mod = req->rq_cb_data;
 710         struct ptlrpc_request *cur, *tmp;
 711
 712         DEBUG_REQ(D_HA, req, "req committed");
 713
 714         if (mod == NULL)
 715                 return;
 716
 717         req->rq_cb_data = NULL;
 718         req->rq_commit_cb = NULL;
 719         list_del_init(&req->rq_mod_list);
 720         if (req->rq_sequence) {
 721                 list_for_each_entry_safe(cur, tmp, &mod->mod_replay_list,
 722                                          rq_mod_list) {
 723                         LASSERT(cur != LP_POISON);
 724                         LASSERT(cur->rq_type != LI_POISON);
 725                         DEBUG_REQ(D_HA, cur, "req balanced");
 726                         LASSERT(cur->rq_transno != 0);
 727                         LASSERT(cur->rq_import == req->rq_import);
 728
 729                         /* We no longer want to preserve this for transno-
 730                          * unconditional replay. */
 731                         spin_lock(&cur->rq_lock);
 732                         cur->rq_replay = 0;
 733                         spin_unlock(&cur->rq_lock);
 734                 }
 735         }
 736
 737         if (list_empty(&mod->mod_replay_list)) {
 738                 if (mod->mod_och != NULL)
 739                         mod->mod_och->och_mod = NULL;
 740
 741                 OBD_FREE_PTR(mod);
 742         }
 743 }
 744
 745 int mdc_set_open_replay_data(struct obd_export *exp,
 746                              struct obd_client_handle *och,
 747                              struct ptlrpc_request *open_req)
 748 {
 749         struct md_open_data *mod;
 750         struct mdt_rec_create *rec = lustre_msg_buf(open_req->rq_reqmsg,
 751                                                     DLM_INTENT_REC_OFF,
 752                                                     sizeof(*rec));
 753         struct mdt_body *body = lustre_msg_buf(open_req->rq_repmsg,
 754                                                DLM_REPLY_REC_OFF,
 755                                                sizeof(*body));
 756         struct obd_import *imp = open_req->rq_import;
 757         ENTRY;
 758
 759         LASSERT(rec != NULL);
 760
 761         /* Incoming message in my byte order (it's been swabbed). */
 762         LASSERT(lustre_rep_swabbed(open_req, DLM_REPLY_REC_OFF));
 763
 764         /* Outgoing messages always in my byte order. */
 765         LASSERT(body != NULL);
 766
 767         /*Only the import is replayable, we set replay_open data */
 768         if (och && imp->imp_replayable) {
 769                 OBD_ALLOC(mod, sizeof(*mod));
 770                 if (mod == NULL) {
 771                         DEBUG_REQ(D_ERROR, open_req,
 772                                   "Can't allocate md_open_data");
 773                         RETURN(0);
 774                 }
 775                 CFS_INIT_LIST_HEAD(&mod->mod_replay_list);
 776
 777                 spin_lock(&open_req->rq_lock);
 778                 if (!open_req->rq_replay) {
 779                         OBD_FREE(mod, sizeof(*mod));
 780                         spin_unlock(&open_req->rq_lock);
 781                         RETURN(0);
 782                 }
 783
 784                 och->och_mod = mod;
 785                 mod->mod_och = och;
 786                 open_req->rq_cb_data = mod;
 787                 list_add_tail(&open_req->rq_mod_list, &mod->mod_replay_list);
 788                 open_req->rq_commit_cb = mdc_commit_delayed;
 789                 spin_unlock(&open_req->rq_lock);
 790         }
 791
 792         rec->cr_fid2 = body->fid1;
 793         rec->cr_ioepoch = body->ioepoch;
 794         rec->cr_old_handle.cookie = body->handle.cookie;
 795         open_req->rq_replay_cb = mdc_replay_open;
 796         if (!fid_is_sane(&body->fid1)) {
 797                 DEBUG_REQ(D_ERROR, open_req, "Saving replay request with "
 798                           "insane fid");
 799                 LBUG();
 800         }
 801
 802         DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
 803         RETURN(0);
 804 }
 805
 806 int mdc_clear_open_replay_data(struct obd_export *exp,
 807                                struct obd_client_handle *och)
 808 {
 809         struct md_open_data *mod = och->och_mod;
 810         ENTRY;
 811
 812         /*
 813          * Don't free the structure now (it happens in mdc_commit_delayed(),
 814          * after the last request is removed from its replay list),
 815          * but make sure that replay doesn't poke at the och, which is about to
 816          * be freed.
 817          */
 818         LASSERT(mod != LP_POISON);
 819         if (mod != NULL)
 820                 mod->mod_och = NULL;
 821
 822         och->och_mod = NULL;
 823         RETURN(0);
 824 }
 825
 826 int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 827               struct md_open_data *mod, struct ptlrpc_request **request)
 828 {
 829         struct obd_device *obd = class_exp2obd(exp);
 830         int reqsize[4] = { sizeof(struct ptlrpc_body),
 831                            sizeof(struct mdt_epoch),
 832                            sizeof(struct mdt_rec_setattr)};
 833         int repsize[4] = { sizeof(struct ptlrpc_body),
 834                            sizeof(struct mdt_body),
 835                            obd->u.cli.cl_max_mds_easize,
 836                            obd->u.cli.cl_max_mds_cookiesize };
 837         struct ptlrpc_request *req;
 838         int rc;
 839         ENTRY;
 840
 841         reqsize[REQ_REC_OFF + 2] = op_data->op_capa1 ?
 842                                         sizeof(struct lustre_capa) : 0;
 843         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 844                               MDS_CLOSE, 4, reqsize, NULL);
 845         if (req == NULL)
 846                 GOTO(out, rc = -ENOMEM);
 847
 848         /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
 849          * portal whose threads are not taking any DLM locks and are therefore
 850          * always progressing */
 851         /* XXX FIXME bug 249 */
 852         req->rq_request_portal = MDS_READPAGE_PORTAL;
 853
 854         /* Ensure that this close's handle is fixed up during replay. */
 855         if (likely(mod != NULL))
 856                 list_add_tail(&req->rq_mod_list, &mod->mod_replay_list);
 857         else
 858                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 859
 860         mdc_close_pack(req, REQ_REC_OFF, op_data);
 861         ptlrpc_req_set_repsize(req, 4, repsize);
 862         req->rq_commit_cb = mdc_commit_delayed;
 863         req->rq_replay = 1;
 864         LASSERT(req->rq_cb_data == NULL);
 865         req->rq_cb_data = mod;
 866
 867         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 868         rc = ptlrpc_queue_wait(req);
 869         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 870
 871         if (req->rq_repmsg == NULL) {
 872                 CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
 873                        req->rq_status);
 874                 if (rc == 0)
 875                         rc = req->rq_status ? req->rq_status : -EIO;
 876         } else if (rc == 0 || rc == -EAGAIN) {
 877                 rc = lustre_msg_get_status(req->rq_repmsg);
 878                 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
 879                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
 880                                   "= %d", rc);
 881                         if (rc > 0)
 882                                 rc = -rc;
 883                 } else if (mod == NULL) {
 884                         if (req->rq_import->imp_replayable)
 885                                 CERROR("Unexpected: can't find md_open_data,"
 886                                        "but close succeeded with replayable imp"
 887                                        "Please tell CFS.\n");
 888                 }
 889                 if (!lustre_swab_repbuf(req, REPLY_REC_OFF,
 890                                         sizeof(struct mdt_body),
 891                                         lustre_swab_mdt_body)) {
 892                         CERROR("Error unpacking mdt_body\n");
 893                         rc = -EPROTO;
 894                 }
 895         }
 896
 897         EXIT;
 898         *request = req;
 899  out:
 900         if (rc != 0 && rc != -EAGAIN && req && req->rq_commit_cb)
 901                 req->rq_commit_cb(req);
 902
 903         return rc;
 904 }
 905
 906 int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 907                      struct md_open_data *mod)
 908 {
 909         struct obd_device *obd = class_exp2obd(exp);
 910         struct ptlrpc_request *req;
 911         int size[4] = { sizeof(struct ptlrpc_body),
 912                         sizeof(struct mdt_epoch),
 913                         sizeof(struct mdt_rec_setattr)};
 914         int repsize[2] = { sizeof(struct ptlrpc_body),
 915                            sizeof(struct mdt_body)};
 916         int rc;
 917         ENTRY;
 918
 919         if (op_data->op_capa1)
 920                 size[REQ_REC_OFF + 2] = sizeof(struct lustre_capa);
 921         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
 922                               MDS_DONE_WRITING, 4, size, NULL);
 923         if (req == NULL)
 924                 RETURN(-ENOMEM);
 925
 926         mdc_close_pack(req, REQ_REC_OFF, op_data);
 927
 928         req->rq_replay = 1;
 929         req->rq_cb_data = mod;
 930         req->rq_commit_cb = mdc_commit_delayed;
 931         if (likely(mod != NULL))
 932                 list_add_tail(&req->rq_mod_list, &mod->mod_replay_list);
 933         else
 934                 CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 935
 936         ptlrpc_req_set_repsize(req, 2, repsize);
 937         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 938         rc = ptlrpc_queue_wait(req);
 939         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 940
 941         /* Close the open replay sequence if an error occured or no SOM
 942          * attribute update is needed. */
 943         if (rc != -EAGAIN)
 944                 ptlrpc_close_replay_seq(req);
 945
 946         if (rc && rc != -EAGAIN && req->rq_commit_cb)
 947                 req->rq_commit_cb(req);
 948
 949         ptlrpc_req_finished(req);
 950         RETURN(rc);
 951 }
 952
 953 #ifdef HAVE_SPLIT_SUPPORT
 954 int mdc_sendpage(struct obd_export *exp, const struct lu_fid *fid,
 955                  const struct page *page, int offset)
 956 {
 957         int rc, size[3] = { sizeof(struct ptlrpc_body), sizeof(struct mdt_body) };
 958         struct obd_import *imp = class_exp2cliimp(exp);
 959         struct ptlrpc_bulk_desc *desc = NULL;
 960         struct ptlrpc_request *req = NULL;
 961         ENTRY;
 962
 963         CDEBUG(D_INODE, "object: "DFID"\n", PFID(fid));
 964
 965         req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_WRITEPAGE, 3,
 966                               size, NULL);
 967         if (req == NULL)
 968                 GOTO(out, rc = -ENOMEM);
 969
 970         req->rq_request_portal = MDS_READPAGE_PORTAL;
 971
 972         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_GET_SOURCE, MDS_BULK_PORTAL);
 973         if (desc == NULL)
 974                 GOTO(out, rc = -ENOMEM);
 975
 976         /* NB req now owns desc and will free it when it gets freed. */
 977         ptlrpc_prep_bulk_page(desc, (struct page *)page, 0, offset);
 978         mdc_readdir_pack(req, REQ_REC_OFF, 0, offset, fid, NULL);
 979
 980         ptlrpc_req_set_repsize(req, 2, size);
 981         rc = ptlrpc_queue_wait(req);
 982         EXIT;
 983 out:
 984         if (req != NULL)
 985                 ptlrpc_req_finished(req);
 986         return rc;
 987 }
 988 EXPORT_SYMBOL(mdc_sendpage);
 989 #endif
 990
 991 int mdc_readpage(struct obd_export *exp, const struct lu_fid *fid,
 992                  struct obd_capa *oc, __u64 offset, struct page *page,
 993                  struct ptlrpc_request **request)
 994 {
 995         int rc, size[3] = { sizeof(struct ptlrpc_body), sizeof(struct mdt_body) };
 996         struct obd_import *imp = class_exp2cliimp(exp);
 997         struct ptlrpc_bulk_desc *desc = NULL;
 998         struct ptlrpc_request *req = NULL;
 999         struct mdt_body *body;
1000         ENTRY;
1001
1002         CDEBUG(D_INODE, "object: "DFID"\n", PFID(fid));
1003
1004         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
1005         req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_READPAGE, 3, size,
1006                               NULL);
1007         if (req == NULL)
1008                 GOTO(out, rc = -ENOMEM);
1009
1010         /* XXX FIXME bug 249 */
1011         req->rq_request_portal = MDS_READPAGE_PORTAL;
1012
1013         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_PUT_SINK, MDS_BULK_PORTAL);
1014         if (desc == NULL)
1015                 GOTO(out, rc = -ENOMEM);
1016
1017         /* NB req now owns desc and will free it when it gets freed */
1018         ptlrpc_prep_bulk_page(desc, page, 0, CFS_PAGE_SIZE);
1019         mdc_readdir_pack(req, REQ_REC_OFF, offset, CFS_PAGE_SIZE, fid, oc);
1020
1021         ptlrpc_req_set_repsize(req, 2, size);
1022         rc = ptlrpc_queue_wait(req);
1023
1024         if (rc == 0) {
1025                 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1026                                           lustre_swab_mdt_body);
1027                 if (body == NULL) {
1028                         CERROR("Can't unpack mdt_body\n");
1029                         GOTO(out, rc = -EPROTO);
1030                 }
1031
1032                 if (req->rq_bulk->bd_nob_transferred != CFS_PAGE_SIZE) {
1033                         CERROR ("Unexpected # bytes transferred: %d"
1034                                 " (%ld expected)\n",
1035                                 req->rq_bulk->bd_nob_transferred,
1036                                 CFS_PAGE_SIZE);
1037                         GOTO(out, rc = -EPROTO);
1038                 }
1039         }
1040
1041         EXIT;
1042  out:
1043         *request = req;
1044         return rc;
1045 }
1046
1047 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1048                          void *karg, void *uarg)
1049 {
1050         struct obd_device *obd = exp->exp_obd;
1051         struct obd_ioctl_data *data = karg;
1052         struct obd_import *imp = obd->u.cli.cl_import;
1053         struct llog_ctxt *ctxt;
1054         int rc;
1055         ENTRY;
1056
1057         if (!try_module_get(THIS_MODULE)) {
1058                 CERROR("Can't get module. Is it alive?");
1059                 return -EINVAL;
1060         }
1061         switch (cmd) {
1062         case OBD_IOC_CLIENT_RECOVER:
1063                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1);
1064                 if (rc < 0)
1065                         GOTO(out, rc);
1066                 GOTO(out, rc = 0);
1067         case IOC_OSC_SET_ACTIVE:
1068                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
1069                 GOTO(out, rc);
1070         case OBD_IOC_PARSE: {
1071                 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
1072                 rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
1073                 GOTO(out, rc);
1074         }
1075 #ifdef __KERNEL__
1076         case OBD_IOC_LLOG_INFO:
1077         case OBD_IOC_LLOG_PRINT: {
1078                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1079                 rc = llog_ioctl(ctxt, cmd, data);
1080
1081                 GOTO(out, rc);
1082         }
1083 #endif
1084         case OBD_IOC_POLL_QUOTACHECK:
1085                 rc = lquota_poll_check(quota_interface, exp,
1086                                        (struct if_quotacheck *)karg);
1087                 GOTO(out, rc);
1088         default:
1089                 CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd);
1090                 GOTO(out, rc = -ENOTTY);
1091         }
1092 out:
1093         module_put(THIS_MODULE);
1094
1095         return rc;
1096 }
1097
1098 int mdc_set_info_async(struct obd_export *exp, obd_count keylen,
1099                        void *key, obd_count vallen, void *val,
1100                        struct ptlrpc_request_set *set)
1101 {
1102         struct obd_import *imp = class_exp2cliimp(exp);
1103         int rc = -EINVAL;
1104
1105         if (KEY_IS(KEY_INIT_RECOV)) {
1106                 if (vallen != sizeof(int))
1107                         RETURN(-EINVAL);
1108                 spin_lock(&imp->imp_lock);
1109                 imp->imp_initial_recov = *(int *)val;
1110                 spin_unlock(&imp->imp_lock);
1111                 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
1112                        exp->exp_obd->obd_name, imp->imp_initial_recov);
1113                 RETURN(0);
1114         }
1115         /* Turn off initial_recov after we try all backup servers once */
1116         if (KEY_IS(KEY_INIT_RECOV_BACKUP)) {
1117                 if (vallen != sizeof(int))
1118                         RETURN(-EINVAL);
1119                 spin_lock(&imp->imp_lock);
1120                 imp->imp_initial_recov_bk = *(int *)val;
1121                 if (imp->imp_initial_recov_bk)
1122                         imp->imp_initial_recov = 1;
1123                 spin_unlock(&imp->imp_lock);
1124                 CDEBUG(D_HA, "%s: set imp_initial_recov_bk = %d\n",
1125                        exp->exp_obd->obd_name, imp->imp_initial_recov_bk);
1126                 RETURN(0);
1127         }
1128         if (KEY_IS(KEY_READ_ONLY)) {
1129                 struct ptlrpc_request *req;
1130                 int size[3] = { sizeof(struct ptlrpc_body), keylen, vallen };
1131                 char *bufs[3] = { NULL, key, val };
1132
1133                 if (vallen != sizeof(int))
1134                         RETURN(-EINVAL);
1135
1136                 spin_lock(&imp->imp_lock);
1137                 if (*((int *)val)) {
1138                         imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
1139                         imp->imp_connect_data.ocd_connect_flags |=
1140                                 OBD_CONNECT_RDONLY;
1141                 } else {
1142                         imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
1143                         imp->imp_connect_data.ocd_connect_flags &=
1144                                 ~OBD_CONNECT_RDONLY;
1145                 }
1146                 spin_unlock(&imp->imp_lock);
1147
1148                 req = ptlrpc_prep_req(imp, LUSTRE_MDS_VERSION, MDS_SET_INFO,
1149                                       3, size, bufs);
1150                 if (req == NULL)
1151                         RETURN(-ENOMEM);
1152
1153                 ptlrpc_req_set_repsize(req, 1, NULL);
1154                 if (set) {
1155                         rc = 0;
1156                         ptlrpc_set_add_req(set, req);
1157                         ptlrpc_check_set(set);
1158                 } else {
1159                         rc = ptlrpc_queue_wait(req);
1160                         ptlrpc_req_finished(req);
1161                 }
1162
1163                 RETURN(rc);
1164         }
1165         if (KEY_IS(KEY_FLUSH_CTX)) {
1166                 sptlrpc_import_flush_my_ctx(imp);
1167                 RETURN(0);
1168         }
1169         if (KEY_IS(KEY_MDS_CONN)) {
1170                 struct obd_import *imp = class_exp2cliimp(exp);
1171
1172                 /* mds-mds import */
1173                 spin_lock(&imp->imp_lock);
1174                 imp->imp_server_timeout = 1;
1175                 spin_unlock(&imp->imp_lock);
1176                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1177                 CDEBUG(D_OTHER|D_WARNING, "%s: timeout / 2\n", exp->exp_obd->obd_name);
1178                 RETURN(0);
1179         }
1180
1181         RETURN(rc);
1182 }
1183
1184 int mdc_get_info(struct obd_export *exp, __u32 keylen, void *key,
1185                  __u32 *vallen, void *val)
1186 {
1187         int rc = -EINVAL;
1188
1189         if (KEY_IS(KEY_MAX_EASIZE)) {
1190                 int mdsize, *max_easize;
1191
1192                 if (*vallen != sizeof(int))
1193                         RETURN(-EINVAL);
1194                 mdsize = *(int*)val;
1195                 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
1196                         exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
1197                 max_easize = val;
1198                 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
1199                 RETURN(0);
1200         }
1201         if (KEY_IS(KEY_CONN_DATA)) {
1202                 struct obd_import *imp = class_exp2cliimp(exp);
1203                 struct obd_connect_data *data = val;
1204
1205                 if (*vallen != sizeof(*data))
1206                         RETURN(-EINVAL);
1207
1208                 *data = imp->imp_connect_data;
1209                 RETURN(0);
1210         }
1211
1212         RETURN(rc);
1213 }
1214
1215 static int mdc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1216                       __u64 max_age)
1217 {
1218         struct ptlrpc_request *req;
1219         struct obd_statfs *msfs;
1220         int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*msfs) };
1221         ENTRY;
1222
1223         /* We could possibly pass max_age in the request (as an absolute
1224          * timestamp or a "seconds.usec ago") so the target can avoid doing
1225          * extra calls into the filesystem if that isn't necessary (e.g.
1226          * during mount that would help a bit).  Having relative timestamps
1227          * is not so great if request processing is slow, while absolute
1228          * timestamps are not ideal because they need time synchronization. */
1229         req = ptlrpc_prep_req(obd->u.cli.cl_import, LUSTRE_MDS_VERSION,
1230                               MDS_STATFS, 1, NULL, NULL);
1231         if (!req)
1232                 RETURN(-ENOMEM);
1233
1234         ptlrpc_req_set_repsize(req, 2, size);
1235
1236         rc = ptlrpc_queue_wait(req);
1237
1238         if (rc) {
1239                 /* check connection error first */
1240                 if (obd->u.cli.cl_import->imp_connect_error)
1241                         rc = obd->u.cli.cl_import->imp_connect_error;
1242
1243                 GOTO(out, rc);
1244         }
1245
1246         msfs = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*msfs),
1247                                   lustre_swab_obd_statfs);
1248         if (msfs == NULL) {
1249                 CERROR("Can't unpack obd_statfs\n");
1250                 GOTO(out, rc = -EPROTO);
1251         }
1252
1253         memcpy(osfs, msfs, sizeof(*msfs));
1254         EXIT;
1255 out:
1256         ptlrpc_req_finished(req);
1257
1258         return rc;
1259 }
1260
1261 static int mdc_pin(struct obd_export *exp, const struct lu_fid *fid,
1262                    struct obd_capa *oc,
1263                    struct obd_client_handle *handle, int flag)
1264 {
1265         struct ptlrpc_request *req;
1266         struct mdt_body *body;
1267         int rc, size[3] = { sizeof(struct ptlrpc_body), sizeof(*body) };
1268         ENTRY;
1269
1270         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
1271         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1272                               MDS_PIN, 3, size, NULL);
1273         if (req == NULL)
1274                 RETURN(-ENOMEM);
1275
1276         body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof (*body));
1277         body->fid1 = *fid;
1278         body->flags = flag;
1279         mdc_pack_capa(req, REQ_REC_OFF + 1, oc);
1280
1281         ptlrpc_req_set_repsize(req, 2, size);
1282
1283         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1284         rc = ptlrpc_queue_wait(req);
1285         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1286         if (rc) {
1287                 CERROR("pin failed: %d\n", rc);
1288                 ptlrpc_req_finished(req);
1289                 RETURN(rc);
1290         }
1291
1292         body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1293                                   lustre_swab_mdt_body);
1294         if (body == NULL) {
1295                 ptlrpc_req_finished(req);
1296                 RETURN(rc);
1297         }
1298
1299         memcpy(&handle->och_fh, &body->handle, sizeof(body->handle));
1300         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
1301
1302         OBD_ALLOC(handle->och_mod, sizeof(*handle->och_mod));
1303         if (handle->och_mod == NULL) {
1304                 DEBUG_REQ(D_ERROR, req, "can't allocate md_open_data");
1305                 RETURN(-ENOMEM);
1306         }
1307
1308         /* will be dropped by unpin */
1309         CFS_INIT_LIST_HEAD(&handle->och_mod->mod_replay_list);
1310         list_add_tail(&req->rq_mod_list, &handle->och_mod->mod_replay_list);
1311
1312         RETURN(rc);
1313 }
1314
1315 static int mdc_unpin(struct obd_export *exp,
1316                      struct obd_client_handle *handle, int flag)
1317 {
1318         struct ptlrpc_request *req;
1319         struct mdt_body *body;
1320         int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*body) };
1321         ENTRY;
1322
1323         if (handle->och_magic != OBD_CLIENT_HANDLE_MAGIC)
1324                 RETURN(0);
1325
1326         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1327                               MDS_CLOSE, 2, size, NULL);
1328         if (req == NULL)
1329                 RETURN(-ENOMEM);
1330
1331         body = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
1332         memcpy(&body->handle, &handle->och_fh, sizeof(body->handle));
1333         body->flags = flag;
1334
1335         ptlrpc_req_set_repsize(req, 1, NULL);
1336         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1337         rc = ptlrpc_queue_wait(req);
1338         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1339
1340         if (rc != 0)
1341                 CERROR("unpin failed: %d\n", rc);
1342
1343         ptlrpc_req_finished(req);
1344
1345         LASSERT(!list_empty(&handle->och_mod->mod_replay_list));
1346         req = list_entry(handle->och_mod->mod_replay_list.next,
1347                          typeof(*req), rq_mod_list);
1348         list_del_init(&req->rq_mod_list);
1349         ptlrpc_req_finished(req);
1350         LASSERT(list_empty(&handle->och_mod->mod_replay_list));
1351
1352         OBD_FREE(handle->och_mod, sizeof(*handle->och_mod));
1353         RETURN(rc);
1354 }
1355
1356 int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
1357              struct obd_capa *oc, struct ptlrpc_request **request)
1358 {
1359         struct ptlrpc_request *req;
1360         int size[3] = { sizeof(struct ptlrpc_body), sizeof(struct mdt_body) };
1361         int rc;
1362         ENTRY;
1363
1364         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
1365         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1366                               MDS_SYNC, 3, size, NULL);
1367         if (!req)
1368                 RETURN(rc = -ENOMEM);
1369
1370         mdc_pack_req_body(req, REQ_REC_OFF, 0, fid, oc, 0, 0);
1371
1372         ptlrpc_req_set_repsize(req, 2, size);
1373
1374         rc = ptlrpc_queue_wait(req);
1375         if (rc || request == NULL)
1376                 ptlrpc_req_finished(req);
1377         else
1378                 *request = req;
1379
1380         RETURN(rc);
1381 }
1382
1383 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
1384                             enum obd_import_event event)
1385 {
1386         int rc = 0;
1387
1388         LASSERT(imp->imp_obd == obd);
1389
1390         switch (event) {
1391         case IMP_EVENT_DISCON: {
1392 #if 0
1393                 /* XXX Pass event up to OBDs stack. used only for FLD now */
1394                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
1395 #endif
1396                 break;
1397         }
1398         case IMP_EVENT_INACTIVE: {
1399                 struct client_obd *cli = &obd->u.cli;
1400                 /*
1401                  * Flush current sequence to make client obtain new one
1402                  * from server in case of disconnect/reconnect.
1403                  * If range is already empty then no need to flush it.
1404                  */
1405                 if (cli->cl_seq != NULL &&
1406                     !range_is_exhausted(&cli->cl_seq->lcs_space)) {
1407                         seq_client_flush(cli->cl_seq);
1408                 }
1409
1410                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
1411                 break;
1412         }
1413         case IMP_EVENT_INVALIDATE: {
1414                 struct ldlm_namespace *ns = obd->obd_namespace;
1415
1416                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
1417
1418                 break;
1419         }
1420         case IMP_EVENT_ACTIVE: {
1421                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
1422                 break;
1423         }
1424         case IMP_EVENT_OCD:
1425                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
1426                 break;
1427
1428         default:
1429                 CERROR("Unknown import event %x\n", event);
1430                 LBUG();
1431         }
1432         RETURN(rc);
1433 }
1434
1435 static int mdc_fid_init(struct obd_export *exp)
1436 {
1437         struct client_obd *cli = &exp->exp_obd->u.cli;
1438         char *prefix;
1439         int rc;
1440         ENTRY;
1441
1442         OBD_ALLOC_PTR(cli->cl_seq);
1443         if (cli->cl_seq == NULL)
1444                 RETURN(-ENOMEM);
1445
1446         OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
1447         if (prefix == NULL)
1448                 GOTO(out_free_seq, rc = -ENOMEM);
1449
1450         snprintf(prefix, MAX_OBD_NAME + 5, "srv-%s",
1451                  exp->exp_obd->obd_name);
1452
1453         /* Init client side sequence-manager */
1454         rc = seq_client_init(cli->cl_seq, exp,
1455                              LUSTRE_SEQ_METADATA,
1456                              prefix, NULL);
1457         OBD_FREE(prefix, MAX_OBD_NAME + 5);
1458         if (rc)
1459                 GOTO(out_free_seq, rc);
1460
1461         RETURN(rc);
1462 out_free_seq:
1463         OBD_FREE_PTR(cli->cl_seq);
1464         cli->cl_seq = NULL;
1465         return rc;
1466 }
1467
1468 static int mdc_fid_fini(struct obd_export *exp)
1469 {
1470         struct client_obd *cli = &exp->exp_obd->u.cli;
1471         ENTRY;
1472
1473         if (cli->cl_seq != NULL) {
1474                 seq_client_fini(cli->cl_seq);
1475                 OBD_FREE_PTR(cli->cl_seq);
1476                 cli->cl_seq = NULL;
1477         }
1478
1479         RETURN(0);
1480 }
1481
1482 int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1483                   struct md_op_data *op_data)
1484 {
1485         struct client_obd *cli = &exp->exp_obd->u.cli;
1486         struct lu_client_seq *seq = cli->cl_seq;
1487         ENTRY;
1488         RETURN(seq_client_alloc_fid(seq, fid));
1489 }
1490
1491 /* XXX This method is used only to clear current fid seq
1492  * once fld/mds insert failed */
1493 static int mdc_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
1494 {
1495         struct client_obd *cli = &exp->exp_obd->u.cli;
1496
1497         seq_client_flush(cli->cl_seq);
1498         return 0;
1499 }
1500
1501 static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
1502 {
1503         struct client_obd *cli = &obd->u.cli;
1504         struct lprocfs_static_vars lvars;
1505         int rc;
1506         ENTRY;
1507
1508         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1509         if (!cli->cl_rpc_lock)
1510                 RETURN(-ENOMEM);
1511         mdc_init_rpc_lock(cli->cl_rpc_lock);
1512
1513         ptlrpcd_addref();
1514
1515         OBD_ALLOC(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1516         if (!cli->cl_setattr_lock)
1517                 GOTO(err_rpc_lock, rc = -ENOMEM);
1518         mdc_init_rpc_lock(cli->cl_setattr_lock);
1519
1520         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1521         if (!cli->cl_close_lock)
1522                 GOTO(err_setattr_lock, rc = -ENOMEM);
1523         mdc_init_rpc_lock(cli->cl_close_lock);
1524
1525         rc = client_obd_setup(obd, cfg);
1526         if (rc)
1527                 GOTO(err_close_lock, rc);
1528         lprocfs_init_vars(mdc, &lvars);
1529         lprocfs_obd_setup(obd, lvars.obd_vars);
1530         ptlrpc_lprocfs_register_obd(obd);
1531
1532         rc = obd_llog_init(obd, NULL, obd, 0, NULL, NULL);
1533         if (rc) {
1534                 mdc_cleanup(obd);
1535                 CERROR("failed to setup llogging subsystems\n");
1536         }
1537
1538         RETURN(rc);
1539
1540 err_close_lock:
1541         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1542 err_setattr_lock:
1543         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1544 err_rpc_lock:
1545         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1546         ptlrpcd_decref();
1547         RETURN(rc);
1548 }
1549
1550 /* Initialize the default and maximum LOV EA and cookie sizes.  This allows
1551  * us to make MDS RPCs with large enough reply buffers to hold the
1552  * maximum-sized (= maximum striped) EA and cookie without having to
1553  * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
1554 int mdc_init_ea_size(struct obd_export *exp, int easize,
1555                      int def_easize, int cookiesize)
1556 {
1557         struct obd_device *obd = exp->exp_obd;
1558         struct client_obd *cli = &obd->u.cli;
1559         ENTRY;
1560
1561         if (cli->cl_max_mds_easize < easize)
1562                 cli->cl_max_mds_easize = easize;
1563
1564         if (cli->cl_default_mds_easize < def_easize)
1565                 cli->cl_default_mds_easize = def_easize;
1566
1567         if (cli->cl_max_mds_cookiesize < cookiesize)
1568                 cli->cl_max_mds_cookiesize = cookiesize;
1569
1570         RETURN(0);
1571 }
1572
1573 static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
1574 {
1575         int rc = 0;
1576         ENTRY;
1577
1578         switch (stage) {
1579         case OBD_CLEANUP_EARLY:
1580         case OBD_CLEANUP_EXPORTS:
1581                 /* If we set up but never connected, the
1582                    client import will not have been cleaned. */
1583                 if (obd->u.cli.cl_import) {
1584                         struct obd_import *imp;
1585                         imp = obd->u.cli.cl_import;
1586                         CERROR("client import never connected\n");
1587                         ptlrpc_invalidate_import(imp);
1588                         ptlrpc_free_rq_pool(imp->imp_rq_pool);
1589                         class_destroy_import(imp);
1590                         obd->u.cli.cl_import = NULL;
1591                 }
1592                 break;
1593         case OBD_CLEANUP_SELF_EXP:
1594                 rc = obd_llog_finish(obd, 0);
1595                 if (rc != 0)
1596                         CERROR("failed to cleanup llogging subsystems\n");
1597         case OBD_CLEANUP_OBD:
1598                 break;
1599         }
1600         RETURN(rc);
1601 }
1602
1603 static int mdc_cleanup(struct obd_device *obd)
1604 {
1605         struct client_obd *cli = &obd->u.cli;
1606
1607         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1608         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1609         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1610
1611         ptlrpc_lprocfs_unregister_obd(obd);
1612         lprocfs_obd_cleanup(obd);
1613         ptlrpcd_decref();
1614
1615         return client_obd_cleanup(obd);
1616 }
1617
1618
1619 static int mdc_llog_init(struct obd_device *obd, struct obd_llogs *llogs,
1620                          struct obd_device *tgt,
1621                          int count, struct llog_catid *logid,
1622                          struct obd_uuid *uuid)
1623 {
1624         struct llog_ctxt *ctxt;
1625         int rc;
1626         ENTRY;
1627
1628         rc = llog_setup(obd, llogs, LLOG_CONFIG_REPL_CTXT, tgt, 0, NULL,
1629                         &llog_client_ops);
1630         if (rc == 0) {
1631                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1632                 ctxt->loc_imp = obd->u.cli.cl_import;
1633         }
1634
1635         rc = llog_setup(obd, llogs, LLOG_LOVEA_REPL_CTXT, tgt, 0, NULL,
1636                        &llog_client_ops);
1637         if (rc == 0) {
1638                 ctxt = llog_get_context(obd, LLOG_LOVEA_REPL_CTXT);
1639                 ctxt->loc_imp = obd->u.cli.cl_import;
1640         }
1641
1642         RETURN(rc);
1643 }
1644
1645 static int mdc_llog_finish(struct obd_device *obd, int count)
1646 {
1647         int rc;
1648         ENTRY;
1649
1650         rc = llog_cleanup(llog_get_context(obd, LLOG_LOVEA_REPL_CTXT));
1651         if (rc) {
1652                 CERROR("can not cleanup LLOG_CONFIG_REPL_CTXT rc %d\n", rc);
1653         }
1654         rc = llog_cleanup(llog_get_context(obd, LLOG_CONFIG_REPL_CTXT));
1655         RETURN(rc);
1656 }
1657
1658 static int mdc_process_config(struct obd_device *obd, obd_count len, void *buf)
1659 {
1660         struct lustre_cfg *lcfg = buf;
1661         struct lprocfs_static_vars lvars;
1662         int rc = 0;
1663
1664         lprocfs_init_vars(mdc, &lvars);
1665
1666         rc = class_process_proc_param(PARAM_MDC, lvars.obd_vars, lcfg, obd);
1667         return(rc);
1668 }
1669
1670 /* get remote permission for current user on fid */
1671 int mdc_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
1672                         struct obd_capa *oc, struct ptlrpc_request **request)
1673 {
1674         struct ptlrpc_request *req;
1675         struct mdt_body *body;
1676         struct mdt_remote_perm *perm;
1677         int size[5] = { sizeof(struct ptlrpc_body), sizeof(*body) };
1678         int rc;
1679         ENTRY;
1680
1681         size[REQ_REC_OFF + 1] = oc ? sizeof(struct lustre_capa) : 0;
1682
1683         *request = NULL;
1684         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1685                               MDS_GETATTR, 3, size, NULL);
1686         if (!req)
1687                 RETURN(-ENOMEM);
1688
1689         mdc_pack_req_body(req, REQ_REC_OFF, OBD_MD_FLRMTPERM, fid, oc, 0, 0);
1690
1691         size[REPLY_REC_OFF + 1] = sizeof(*perm);
1692         ptlrpc_req_set_repsize(req, 5, size);
1693         rc = ptlrpc_queue_wait(req);
1694         if (rc) {
1695                 ptlrpc_req_finished(req);
1696                 RETURN(rc);
1697         }
1698
1699         body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1700                                   lustre_swab_mdt_body);
1701         LASSERT(body);
1702         LASSERT(body->valid & OBD_MD_FLRMTPERM);
1703
1704         perm = lustre_swab_repbuf(req, REPLY_REC_OFF + 1, sizeof(*perm),
1705                                   lustre_swab_mdt_remote_perm);
1706         LASSERT(perm);
1707
1708         *request = req;
1709         RETURN(0);
1710 }
1711
1712 static int mdc_interpret_renew_capa(struct ptlrpc_request *req, void *unused,
1713                                     int status)
1714 {
1715         struct obd_capa *oc = req->rq_async_args.pointer_arg[0];
1716         renew_capa_cb_t cb = req->rq_async_args.pointer_arg[1];
1717         struct mdt_body *body = NULL;
1718         struct lustre_capa *capa;
1719         ENTRY;
1720
1721         if (status)
1722                 GOTO(out, capa = ERR_PTR(status));
1723
1724         body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
1725                                   lustre_swab_mdt_body);
1726         if (body == NULL)
1727                 GOTO(out, capa = ERR_PTR(-EFAULT));
1728
1729         if ((body->valid & OBD_MD_FLOSSCAPA) == 0)
1730                 GOTO(out, capa = ERR_PTR(-ENOENT));
1731
1732         capa = lustre_unpack_capa(req->rq_repmsg, REPLY_REC_OFF + 1);
1733         if (!capa)
1734                 GOTO(out, capa = ERR_PTR(-EFAULT));
1735         EXIT;
1736 out:
1737         cb(oc, capa);
1738         return 0;
1739 }
1740
1741 static int mdc_renew_capa(struct obd_export *exp, struct obd_capa *oc,
1742                           renew_capa_cb_t cb)
1743 {
1744         struct ptlrpc_request *req;
1745         int size[5] = { sizeof(struct ptlrpc_body),
1746                         sizeof(struct mdt_body),
1747                         sizeof(struct lustre_capa) };
1748         ENTRY;
1749
1750         req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MDS_VERSION,
1751                               MDS_GETATTR, 3, size, NULL);
1752         if (!req)
1753                 RETURN(-ENOMEM);
1754
1755         mdc_pack_req_body(req, REQ_REC_OFF, OBD_MD_FLOSSCAPA,
1756                           &oc->c_capa.lc_fid, oc, 0, 0);
1757
1758         ptlrpc_req_set_repsize(req, 5, size);
1759         req->rq_async_args.pointer_arg[0] = oc;
1760         req->rq_async_args.pointer_arg[1] = cb;
1761         req->rq_interpret_reply = mdc_interpret_renew_capa;
1762         ptlrpcd_add_req(req);
1763
1764         RETURN(0);
1765 }
1766
1767 static int mdc_connect(const struct lu_env *env,
1768                        struct lustre_handle *dlm_handle,
1769                        struct obd_device *obd, struct obd_uuid *cluuid,
1770                        struct obd_connect_data *data) {
1771         struct obd_import *imp = obd->u.cli.cl_import;
1772
1773         /* mds-mds import features */
1774         if (data && (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS)) {
1775                 spin_lock(&imp->imp_lock);
1776                 imp->imp_server_timeout = 1;
1777                 spin_unlock(&imp->imp_lock);
1778                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1779                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
1780                        obd->obd_name);
1781         }
1782
1783         return client_connect_import(env, dlm_handle, obd, cluuid, data);
1784 }
1785
1786 struct obd_ops mdc_obd_ops = {
1787         .o_owner            = THIS_MODULE,
1788         .o_setup            = mdc_setup,
1789         .o_precleanup       = mdc_precleanup,
1790         .o_cleanup          = mdc_cleanup,
1791         .o_add_conn         = client_import_add_conn,
1792         .o_del_conn         = client_import_del_conn,
1793         .o_connect          = mdc_connect,
1794         .o_disconnect       = client_disconnect_export,
1795         .o_iocontrol        = mdc_iocontrol,
1796         .o_set_info_async   = mdc_set_info_async,
1797         .o_statfs           = mdc_statfs,
1798         .o_pin              = mdc_pin,
1799         .o_unpin            = mdc_unpin,
1800         .o_fid_init         = mdc_fid_init,
1801         .o_fid_fini         = mdc_fid_fini,
1802         .o_fid_alloc        = mdc_fid_alloc,
1803         .o_fid_delete       = mdc_fid_delete,
1804         .o_import_event     = mdc_import_event,
1805         .o_llog_init        = mdc_llog_init,
1806         .o_llog_finish      = mdc_llog_finish,
1807         .o_get_info         = mdc_get_info,
1808         .o_process_config  = mdc_process_config,
1809 };
1810
1811 struct md_ops mdc_md_ops = {
1812         .m_getstatus        = mdc_getstatus,
1813         .m_change_cbdata    = mdc_change_cbdata,
1814         .m_close            = mdc_close,
1815         .m_create           = mdc_create,
1816         .m_done_writing     = mdc_done_writing,
1817         .m_enqueue          = mdc_enqueue,
1818         .m_getattr          = mdc_getattr,
1819         .m_getattr_name     = mdc_getattr_name,
1820         .m_intent_lock      = mdc_intent_lock,
1821         .m_link             = mdc_link,
1822         .m_is_subdir        = mdc_is_subdir,
1823         .m_rename           = mdc_rename,
1824         .m_setattr          = mdc_setattr,
1825         .m_setxattr         = mdc_setxattr,
1826         .m_getxattr         = mdc_getxattr,
1827         .m_sync             = mdc_sync,
1828         .m_readpage         = mdc_readpage,
1829         .m_unlink           = mdc_unlink,
1830         .m_cancel_unused    = mdc_cancel_unused,
1831         .m_init_ea_size     = mdc_init_ea_size,
1832         .m_set_lock_data    = mdc_set_lock_data,
1833         .m_lock_match       = mdc_lock_match,
1834         .m_get_lustre_md    = mdc_get_lustre_md,
1835         .m_free_lustre_md   = mdc_free_lustre_md,
1836         .m_set_open_replay_data = mdc_set_open_replay_data,
1837         .m_clear_open_replay_data = mdc_clear_open_replay_data,
1838         .m_get_remote_perm  = mdc_get_remote_perm,
1839         .m_renew_capa       = mdc_renew_capa
1840 };
1841
1842 extern quota_interface_t mdc_quota_interface;
1843
1844 int __init mdc_init(void)
1845 {
1846         int rc;
1847         struct lprocfs_static_vars lvars;
1848         lprocfs_init_vars(mdc, &lvars);
1849
1850         request_module("lquota");
1851         quota_interface = PORTAL_SYMBOL_GET(mdc_quota_interface);
1852         init_obd_quota_ops(quota_interface, &mdc_obd_ops);
1853
1854         rc = class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
1855                                  LUSTRE_MDC_NAME, NULL);
1856         if (rc && quota_interface)
1857                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1858
1859         RETURN(rc);
1860 }
1861
1862 #ifdef __KERNEL__
1863 static void /*__exit*/ mdc_exit(void)
1864 {
1865         if (quota_interface)
1866                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1867
1868         class_unregister_type(LUSTRE_MDC_NAME);
1869 }
1870
1871 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1872 MODULE_DESCRIPTION("Lustre Metadata Client");
1873 MODULE_LICENSE("GPL");
1874
1875 module_init(mdc_init);
1876 module_exit(mdc_exit);
1877 #endif