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  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #ifndef EXPORT_SYMTAB
  38 # define EXPORT_SYMTAB
  39 #endif
  40 #define DEBUG_SUBSYSTEM S_MDC
  41
  42 #ifdef __KERNEL__
  43 # include <linux/module.h>
  44 # include <linux/pagemap.h>
  45 # include <linux/miscdevice.h>
  46 # include <linux/init.h>
  47 #else
  48 # include <liblustre.h>
  49 #endif
  50
  51 #include <lustre_acl.h>
  52 #include <obd_class.h>
  53 #include <lustre_dlm.h>
  54 #include <lustre_fid.h>
  55 #include <md_object.h>
  56 #include <lprocfs_status.h>
  57 #include <lustre_param.h>
  58 #include "mdc_internal.h"
  59 #include <lustre/lustre_idl.h>
  60
  61 #define REQUEST_MINOR 244
  62
  63 static quota_interface_t *quota_interface;
  64 extern quota_interface_t mdc_quota_interface;
  65
  66 static int mdc_cleanup(struct obd_device *obd);
  67
  68 int mdc_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
  69                     const struct req_msg_field *field, struct obd_capa **oc)
  70 {
  71         struct lustre_capa *capa;
  72         struct obd_capa *c;
  73         ENTRY;
  74
  75         /* swabbed already in mdc_enqueue */
  76         capa = req_capsule_server_get(&req->rq_pill, field);
  77         if (capa == NULL)
  78                 RETURN(-EPROTO);
  79
  80         c = alloc_capa(CAPA_SITE_CLIENT);
  81         if (IS_ERR(c)) {
  82                 CDEBUG(D_INFO, "alloc capa failed!\n");
  83                 RETURN(PTR_ERR(c));
  84         } else {
  85                 c->c_capa = *capa;
  86                 *oc = c;
  87                 RETURN(0);
  88         }
  89 }
  90
  91 /* Helper that implements most of mdc_getstatus and signal_completed_replay. */
  92 /* XXX this should become mdc_get_info("key"), sending MDS_GET_INFO RPC */
  93 static int send_getstatus(struct obd_import *imp, struct lu_fid *rootfid,
  94                           struct obd_capa **pc, int level, int msg_flags)
  95 {
  96         struct ptlrpc_request *req;
  97         struct mdt_body       *body;
  98         int                    rc;
  99         ENTRY;
 100
 101         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_GETSTATUS,
 102                                         LUSTRE_MDS_VERSION, MDS_GETSTATUS);
 103         if (req == NULL)
 104                 RETURN(-ENOMEM);
 105
 106         mdc_pack_body(req, NULL, NULL, 0, 0, -1, 0);
 107         lustre_msg_add_flags(req->rq_reqmsg, msg_flags);
 108         req->rq_send_state = level;
 109
 110         ptlrpc_request_set_replen(req);
 111
 112         rc = ptlrpc_queue_wait(req);
 113         if (rc)
 114                 GOTO(out, rc);
 115
 116         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 117         if (body == NULL)
 118                 GOTO(out, rc = -EPROTO);
 119
 120         if (body->valid & OBD_MD_FLMDSCAPA) {
 121                 rc = mdc_unpack_capa(NULL, req, &RMF_CAPA1, pc);
 122                 if (rc)
 123                         GOTO(out, rc);
 124         }
 125
 126         *rootfid = body->fid1;
 127         CDEBUG(D_NET,
 128                "root fid="DFID", last_committed="LPU64", last_xid="LPU64"\n",
 129                PFID(rootfid),
 130                lustre_msg_get_last_committed(req->rq_repmsg),
 131                lustre_msg_get_last_xid(req->rq_repmsg));
 132         EXIT;
 133 out:
 134         ptlrpc_req_finished(req);
 135         return rc;
 136 }
 137
 138 /* This should be mdc_get_info("rootfid") */
 139 int mdc_getstatus(struct obd_export *exp, struct lu_fid *rootfid,
 140                   struct obd_capa **pc)
 141 {
 142         return send_getstatus(class_exp2cliimp(exp), rootfid, pc,
 143                               LUSTRE_IMP_FULL, 0);
 144 }
 145
 146 /*
 147  * This function now is known to always saying that it will receive 4 buffers
 148  * from server. Even for cases when acl_size and md_size is zero, RPC header
 149  * will contain 4 fields and RPC itself will contain zero size fields. This is
 150  * because mdt_getattr*() _always_ returns 4 fields, but if acl is not needed
 151  * and thus zero, it shrinks it, making zero size. The same story about
 152  * md_size. And this is course of problem when client waits for smaller number
 153  * of fields. This issue will be fixed later when client gets aware of RPC
 154  * layouts.  --umka
 155  */
 156 static int mdc_getattr_common(struct obd_export *exp,
 157                               struct ptlrpc_request *req)
 158 {
 159         struct req_capsule *pill = &req->rq_pill;
 160         struct mdt_body    *body;
 161         void               *eadata;
 162         int                 rc;
 163         ENTRY;
 164
 165         /* Request message already built. */
 166         rc = ptlrpc_queue_wait(req);
 167         if (rc != 0)
 168                 RETURN(rc);
 169
 170         /* sanity check for the reply */
 171         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 172         if (body == NULL)
 173                 RETURN(-EPROTO);
 174
 175         CDEBUG(D_NET, "mode: %o\n", body->mode);
 176
 177         if (body->eadatasize != 0) {
 178                 eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 179                                                       body->eadatasize);
 180                 if (eadata == NULL)
 181                         RETURN(-EPROTO);
 182         }
 183
 184         if (body->valid & OBD_MD_FLRMTPERM) {
 185                 struct mdt_remote_perm *perm;
 186
 187                 LASSERT(client_is_remote(exp));
 188                 perm = req_capsule_server_swab_get(pill, &RMF_ACL,
 189                                                 lustre_swab_mdt_remote_perm);
 190                 if (perm == NULL)
 191                         RETURN(-EPROTO);
 192         }
 193
 194         if (body->valid & OBD_MD_FLMDSCAPA) {
 195                 struct lustre_capa *capa;
 196                 capa = req_capsule_server_get(pill, &RMF_CAPA1);
 197                 if (capa == NULL)
 198                         RETURN(-EPROTO);
 199         }
 200
 201         RETURN(0);
 202 }
 203
 204 int mdc_getattr(struct obd_export *exp, const struct lu_fid *fid,
 205                 struct obd_capa *oc, obd_valid valid, int ea_size,
 206                 struct ptlrpc_request **request)
 207 {
 208         struct ptlrpc_request *req;
 209         int                    rc;
 210         ENTRY;
 211
 212         *request = NULL;
 213         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
 214         if (req == NULL)
 215                 RETURN(-ENOMEM);
 216
 217         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 218
 219         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
 220         if (rc) {
 221                 ptlrpc_request_free(req);
 222                 RETURN(rc);
 223         }
 224
 225         /* MDS_BFLAG_EXT_FLAGS: request "new" flags(bug 9486) */
 226         mdc_pack_body(req, fid, oc, valid, ea_size, -1, MDS_BFLAG_EXT_FLAGS);
 227
 228         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, ea_size);
 229         if (valid & OBD_MD_FLRMTPERM) {
 230                 LASSERT(client_is_remote(exp));
 231                 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
 232                                      sizeof(struct mdt_remote_perm));
 233         }
 234         ptlrpc_request_set_replen(req);
 235
 236         rc = mdc_getattr_common(exp, req);
 237         if (rc)
 238                 ptlrpc_req_finished(req);
 239         else
 240                 *request = req;
 241         RETURN(rc);
 242 }
 243
 244 int mdc_getattr_name(struct obd_export *exp, const struct lu_fid *fid,
 245                      struct obd_capa *oc, const char *filename, int namelen,
 246                      obd_valid valid, int ea_size, __u32 suppgid,
 247                      struct ptlrpc_request **request)
 248 {
 249         struct ptlrpc_request *req;
 250         int                    rc;
 251         ENTRY;
 252
 253         *request = NULL;
 254         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 255                                    &RQF_MDS_GETATTR_NAME);
 256         if (req == NULL)
 257                 RETURN(-ENOMEM);
 258
 259         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 260         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT, namelen);
 261
 262         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR_NAME);
 263         if (rc) {
 264                 ptlrpc_request_free(req);
 265                 RETURN(rc);
 266         }
 267
 268         /* MDS_BFLAG_EXT_FLAGS: request "new" flags(bug 9486) */
 269         mdc_pack_body(req, fid, oc, valid, ea_size, suppgid,
 270                       MDS_BFLAG_EXT_FLAGS);
 271
 272         if (filename) {
 273                 char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 274                 LASSERT(strnlen(filename, namelen) == namelen - 1);
 275                 memcpy(name, filename, namelen);
 276         }
 277
 278         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, ea_size);
 279         ptlrpc_request_set_replen(req);
 280
 281         rc = mdc_getattr_common(exp, req);
 282         if (rc)
 283                 ptlrpc_req_finished(req);
 284         else
 285                 *request = req;
 286         RETURN(rc);
 287 }
 288
 289 static int mdc_is_subdir(struct obd_export *exp,
 290                          const struct lu_fid *pfid,
 291                          const struct lu_fid *cfid,
 292                          struct ptlrpc_request **request)
 293 {
 294         struct ptlrpc_request  *req;
 295         int                     rc;
 296
 297         ENTRY;
 298
 299         *request = NULL;
 300         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 301                                         &RQF_MDS_IS_SUBDIR, LUSTRE_MDS_VERSION,
 302                                         MDS_IS_SUBDIR);
 303         if (req == NULL)
 304                 RETURN(-ENOMEM);
 305
 306         mdc_is_subdir_pack(req, pfid, cfid, 0);
 307         ptlrpc_request_set_replen(req);
 308
 309         rc = ptlrpc_queue_wait(req);
 310         if (rc && rc != -EREMOTE)
 311                 ptlrpc_req_finished(req);
 312         else
 313                 *request = req;
 314         RETURN(rc);
 315 }
 316
 317 static int mdc_xattr_common(struct obd_export *exp,const struct req_format *fmt,
 318                             const struct lu_fid *fid,
 319                             struct obd_capa *oc, int opcode, obd_valid valid,
 320                             const char *xattr_name, const char *input,
 321                             int input_size, int output_size, int flags,
 322                             __u32 suppgid, struct ptlrpc_request **request)
 323 {
 324         struct ptlrpc_request *req;
 325         int   xattr_namelen = 0;
 326         char *tmp;
 327         int   rc;
 328         ENTRY;
 329
 330         *request = NULL;
 331         req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
 332         if (req == NULL)
 333                 RETURN(-ENOMEM);
 334
 335         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 336         if (xattr_name) {
 337                 xattr_namelen = strlen(xattr_name) + 1;
 338                 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
 339                                      xattr_namelen);
 340         }
 341         if (input_size) {
 342                 LASSERT(input);
 343                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
 344                                      input_size);
 345         }
 346
 347         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, opcode);
 348         if (rc) {
 349                 ptlrpc_request_free(req);
 350                 RETURN(rc);
 351         }
 352
 353         if (opcode == MDS_REINT) {
 354                 struct mdt_rec_setxattr *rec;
 355
 356                 CLASSERT(sizeof(struct mdt_rec_setxattr) ==
 357                          sizeof(struct mdt_rec_reint));
 358                 rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 359                 rec->sx_opcode = REINT_SETXATTR;
 360                 /* TODO:
 361                  *  cfs_curproc_fs{u,g}id() should replace
 362                  *  current->fs{u,g}id for portability.
 363                  */
 364                 rec->sx_fsuid  = current->fsuid;
 365                 rec->sx_fsgid  = current->fsgid;
 366                 rec->sx_cap    = cfs_curproc_cap_pack();
 367                 rec->sx_suppgid1 = suppgid;
 368                 rec->sx_suppgid2 = -1;
 369                 rec->sx_fid    = *fid;
 370                 rec->sx_valid  = valid | OBD_MD_FLCTIME;
 371                 rec->sx_time   = cfs_time_current_sec();
 372                 rec->sx_size   = output_size;
 373                 rec->sx_flags  = flags;
 374
 375                 mdc_pack_capa(req, &RMF_CAPA1, oc);
 376         } else {
 377                 mdc_pack_body(req, fid, oc, valid, output_size, suppgid, flags);
 378         }
 379
 380         if (xattr_name) {
 381                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 382                 memcpy(tmp, xattr_name, xattr_namelen);
 383         }
 384         if (input_size) {
 385                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
 386                 memcpy(tmp, input, input_size);
 387         }
 388
 389         if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
 390                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
 391                                      RCL_SERVER, output_size);
 392         ptlrpc_request_set_replen(req);
 393
 394         /* make rpc */
 395         if (opcode == MDS_REINT)
 396                 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 397
 398         rc = ptlrpc_queue_wait(req);
 399
 400         if (opcode == MDS_REINT)
 401                 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 402
 403         if (rc)
 404                 ptlrpc_req_finished(req);
 405         else
 406                 *request = req;
 407         RETURN(rc);
 408 }
 409
 410 int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
 411                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 412                  const char *input, int input_size, int output_size,
 413                  int flags, __u32 suppgid, struct ptlrpc_request **request)
 414 {
 415         return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
 416                                 fid, oc, MDS_REINT, valid, xattr_name,
 417                                 input, input_size, output_size, flags,
 418                                 suppgid, request);
 419 }
 420
 421 int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
 422                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 423                  const char *input, int input_size, int output_size,
 424                  int flags, struct ptlrpc_request **request)
 425 {
 426         return mdc_xattr_common(exp, &RQF_MDS_GETXATTR,
 427                                 fid, oc, MDS_GETXATTR, valid, xattr_name,
 428                                 input, input_size, output_size, flags,
 429                                 -1, request);
 430 }
 431
 432 #ifdef CONFIG_FS_POSIX_ACL
 433 static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
 434 {
 435         struct req_capsule     *pill = &req->rq_pill;
 436         struct mdt_body        *body = md->body;
 437         struct posix_acl       *acl;
 438         void                   *buf;
 439         int                     rc;
 440         ENTRY;
 441
 442         if (!body->aclsize)
 443                 RETURN(0);
 444
 445         buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->aclsize);
 446
 447         if (!buf)
 448                 RETURN(-EPROTO);
 449
 450         acl = posix_acl_from_xattr(buf, body->aclsize);
 451         if (IS_ERR(acl)) {
 452                 rc = PTR_ERR(acl);
 453                 CERROR("convert xattr to acl: %d\n", rc);
 454                 RETURN(rc);
 455         }
 456
 457         rc = posix_acl_valid(acl);
 458         if (rc) {
 459                 CERROR("validate acl: %d\n", rc);
 460                 posix_acl_release(acl);
 461                 RETURN(rc);
 462         }
 463
 464         md->posix_acl = acl;
 465         RETURN(0);
 466 }
 467 #else
 468 #define mdc_unpack_acl(req, md) 0
 469 #endif
 470
 471 int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
 472                       struct obd_export *dt_exp, struct obd_export *md_exp,
 473                       struct lustre_md *md)
 474 {
 475         struct req_capsule *pill = &req->rq_pill;
 476         int rc;
 477         ENTRY;
 478
 479         LASSERT(md);
 480         memset(md, 0, sizeof(*md));
 481
 482         md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 483         LASSERT(md->body != NULL);
 484
 485         if (md->body->valid & OBD_MD_FLEASIZE) {
 486                 int lmmsize;
 487                 struct lov_mds_md *lmm;
 488
 489                 if (!S_ISREG(md->body->mode)) {
 490                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, should be a "
 491                                "regular file, but is not\n");
 492                         GOTO(out, rc = -EPROTO);
 493                 }
 494
 495                 if (md->body->eadatasize == 0) {
 496                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, "
 497                                "but eadatasize 0\n");
 498                         GOTO(out, rc = -EPROTO);
 499                 }
 500                 lmmsize = md->body->eadatasize;
 501                 lmm = req_capsule_server_sized_get(pill, &RMF_MDT_MD, lmmsize);
 502                 if (!lmm)
 503                         GOTO(out, rc = -EPROTO);
 504
 505                 rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize);
 506                 if (rc < 0)
 507                         GOTO(out, rc);
 508
 509                 if (rc < sizeof(*md->lsm)) {
 510                         CDEBUG(D_INFO, "lsm size too small: "
 511                                "rc < sizeof (*md->lsm) (%d < %d)\n",
 512                                rc, (int)sizeof(*md->lsm));
 513                         GOTO(out, rc = -EPROTO);
 514                 }
 515
 516         } else if (md->body->valid & OBD_MD_FLDIREA) {
 517                 int lmvsize;
 518                 struct lov_mds_md *lmv;
 519
 520                 if(!S_ISDIR(md->body->mode)) {
 521                         CDEBUG(D_INFO, "OBD_MD_FLDIREA set, should be a "
 522                                "directory, but is not\n");
 523                         GOTO(out, rc = -EPROTO);
 524                 }
 525
 526                 if (md->body->eadatasize == 0) {
 527                         CDEBUG(D_INFO, "OBD_MD_FLDIREA is set, "
 528                                "but eadatasize 0\n");
 529                         RETURN(-EPROTO);
 530                 }
 531                 if (md->body->valid & OBD_MD_MEA) {
 532                         lmvsize = md->body->eadatasize;
 533                         lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 534                                                            lmvsize);
 535                         if (!lmv)
 536                                 GOTO(out, rc = -EPROTO);
 537
 538                         rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
 539                                           lmvsize);
 540                         if (rc < 0)
 541                                 GOTO(out, rc);
 542
 543                         if (rc < sizeof(*md->mea)) {
 544                                 CDEBUG(D_INFO, "size too small:  "
 545                                        "rc < sizeof(*md->mea) (%d < %d)\n",
 546                                         rc, (int)sizeof(*md->mea));
 547                                 GOTO(out, rc = -EPROTO);
 548                         }
 549                 }
 550         }
 551         rc = 0;
 552
 553         if (md->body->valid & OBD_MD_FLRMTPERM) {
 554                 /* remote permission */
 555                 LASSERT(client_is_remote(exp));
 556                 md->remote_perm = req_capsule_server_swab_get(pill, &RMF_ACL,
 557                                                 lustre_swab_mdt_remote_perm);
 558                 if (!md->remote_perm)
 559                         GOTO(out, rc = -EPROTO);
 560         }
 561         else if (md->body->valid & OBD_MD_FLACL) {
 562                 /* for ACL, it's possible that FLACL is set but aclsize is zero.
 563                  * only when aclsize != 0 there's an actual segment for ACL
 564                  * in reply buffer.
 565                  */
 566                 if (md->body->aclsize) {
 567                         rc = mdc_unpack_acl(req, md);
 568                         if (rc)
 569                                 GOTO(out, rc);
 570 #ifdef CONFIG_FS_POSIX_ACL
 571                 } else {
 572                         md->posix_acl = NULL;
 573 #endif
 574                 }
 575         }
 576         if (md->body->valid & OBD_MD_FLMDSCAPA) {
 577                 struct obd_capa *oc = NULL;
 578
 579                 rc = mdc_unpack_capa(NULL, req, &RMF_CAPA1, &oc);
 580                 if (rc)
 581                         GOTO(out, rc);
 582                 md->mds_capa = oc;
 583         }
 584
 585         if (md->body->valid & OBD_MD_FLOSSCAPA) {
 586                 struct obd_capa *oc = NULL;
 587
 588                 rc = mdc_unpack_capa(NULL, req, &RMF_CAPA2, &oc);
 589                 if (rc)
 590                         GOTO(out, rc);
 591                 md->oss_capa = oc;
 592         }
 593
 594         EXIT;
 595 out:
 596         if (rc) {
 597                 if (md->oss_capa) {
 598                         capa_put(md->oss_capa);
 599                         md->oss_capa = NULL;
 600                 }
 601                 if (md->mds_capa) {
 602                         capa_put(md->mds_capa);
 603                         md->mds_capa = NULL;
 604                 }
 605 #ifdef CONFIG_FS_POSIX_ACL
 606                 posix_acl_release(md->posix_acl);
 607 #endif
 608                 if (md->lsm)
 609                         obd_free_memmd(dt_exp, &md->lsm);
 610         }
 611         return rc;
 612 }
 613
 614 int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
 615 {
 616         ENTRY;
 617         RETURN(0);
 618 }
 619
 620 /**
 621  * Handles both OPEN and SETATTR RPCs for OPEN-CLOSE and SETATTR-DONE_WRITING
 622  * RPC chains.
 623  */
 624 void mdc_replay_open(struct ptlrpc_request *req)
 625 {
 626         struct md_open_data *mod = req->rq_cb_data;
 627         struct ptlrpc_request *close_req;
 628         struct obd_client_handle *och;
 629         struct lustre_handle old;
 630         struct mdt_body *body;
 631         ENTRY;
 632
 633         if (mod == NULL) {
 634                 DEBUG_REQ(D_ERROR, req,
 635                           "Can't properly replay without open data.");
 636                 EXIT;
 637                 return;
 638         }
 639
 640         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 641         LASSERT(body != NULL);
 642
 643         och = mod->mod_och;
 644         if (och != NULL) {
 645                 struct lustre_handle *file_fh;
 646
 647                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 648
 649                 file_fh = &och->och_fh;
 650                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 651                        file_fh->cookie, body->handle.cookie);
 652                 old = *file_fh;
 653                 *file_fh = body->handle;
 654         }
 655         close_req = mod->mod_close_req;
 656         if (close_req != NULL) {
 657                 __u32 opc = lustre_msg_get_opc(close_req->rq_reqmsg);
 658                 struct mdt_epoch *epoch;
 659
 660                 LASSERT(opc == MDS_CLOSE || opc == MDS_DONE_WRITING);
 661                 epoch = req_capsule_client_get(&close_req->rq_pill,
 662                                                &RMF_MDT_EPOCH);
 663                 LASSERT(epoch);
 664
 665                 if (och != NULL)
 666                         LASSERT(!memcmp(&old, &epoch->handle, sizeof(old)));
 667                 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
 668                 epoch->handle = body->handle;
 669         }
 670         EXIT;
 671 }
 672
 673 void mdc_commit_open(struct ptlrpc_request *req)
 674 {
 675         struct md_open_data *mod = req->rq_cb_data;
 676         if (mod == NULL)
 677                 return;
 678
 679         if (mod->mod_close_req != NULL)
 680                 mod->mod_close_req->rq_cb_data = NULL;
 681
 682         if (mod->mod_och != NULL)
 683                 mod->mod_och->och_mod = NULL;
 684
 685         OBD_FREE(mod, sizeof(*mod));
 686         req->rq_cb_data = NULL;
 687 }
 688
 689 int mdc_set_open_replay_data(struct obd_export *exp,
 690                              struct obd_client_handle *och,
 691                              struct ptlrpc_request *open_req)
 692 {
 693         struct md_open_data   *mod;
 694         struct mdt_rec_create *rec;
 695         struct mdt_body       *body;
 696         struct obd_import     *imp = open_req->rq_import;
 697         ENTRY;
 698
 699         if (!open_req->rq_replay)
 700                 RETURN(0);
 701
 702         rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
 703         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
 704         LASSERT(rec != NULL);
 705         /* Incoming message in my byte order (it's been swabbed). */
 706         /* Outgoing messages always in my byte order. */
 707         LASSERT(body != NULL);
 708
 709         /* Only if the import is replayable, we set replay_open data */
 710         if (och && imp->imp_replayable) {
 711                 OBD_ALLOC_PTR(mod);
 712                 if (mod == NULL) {
 713                         DEBUG_REQ(D_ERROR, open_req,
 714                                   "Can't allocate md_open_data");
 715                         RETURN(0);
 716                 }
 717
 718                 spin_lock(&open_req->rq_lock);
 719                 och->och_mod = mod;
 720                 mod->mod_och = och;
 721                 mod->mod_open_req = open_req;
 722                 open_req->rq_cb_data = mod;
 723                 open_req->rq_commit_cb = mdc_commit_open;
 724                 spin_unlock(&open_req->rq_lock);
 725         }
 726
 727         rec->cr_fid2 = body->fid1;
 728         rec->cr_ioepoch = body->ioepoch;
 729         rec->cr_old_handle.cookie = body->handle.cookie;
 730         open_req->rq_replay_cb = mdc_replay_open;
 731         if (!fid_is_sane(&body->fid1)) {
 732                 DEBUG_REQ(D_ERROR, open_req, "Saving replay request with "
 733                           "insane fid");
 734                 LBUG();
 735         }
 736
 737         DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
 738         RETURN(0);
 739 }
 740
 741 int mdc_clear_open_replay_data(struct obd_export *exp,
 742                                struct obd_client_handle *och)
 743 {
 744         struct md_open_data *mod = och->och_mod;
 745         ENTRY;
 746
 747         /*
 748          * Don't free the structure now (it happens in mdc_commit_open(), after
 749          * we're sure we won't need to fix up the close request in the future),
 750          * but make sure that replay doesn't poke at the och, which is about to
 751          * be freed.
 752          */
 753         LASSERT(mod != LP_POISON);
 754         if (mod != NULL)
 755                 mod->mod_och = NULL;
 756
 757         och->och_mod = NULL;
 758         RETURN(0);
 759 }
 760
 761 int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 762               struct md_open_data *mod, struct ptlrpc_request **request)
 763 {
 764         struct obd_device     *obd = class_exp2obd(exp);
 765         struct ptlrpc_request *req;
 766         int                    rc;
 767         ENTRY;
 768
 769         *request = NULL;
 770         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_CLOSE);
 771         if (req == NULL)
 772                 RETURN(-ENOMEM);
 773
 774         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 775
 776         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
 777         if (rc) {
 778                 ptlrpc_request_free(req);
 779                 RETURN(rc);
 780         }
 781
 782         /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
 783          * portal whose threads are not taking any DLM locks and are therefore
 784          * always progressing */
 785         req->rq_request_portal = MDS_READPAGE_PORTAL;
 786         ptlrpc_at_set_req_timeout(req);
 787
 788         /* Ensure that this close's handle is fixed up during replay. */
 789         if (likely(mod != NULL)) {
 790                 LASSERTF(mod->mod_open_req->rq_type != LI_POISON,
 791                          "POISONED open %p!\n", mod->mod_open_req);
 792
 793                 mod->mod_close_req = req;
 794                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open");
 795                 /* We no longer want to preserve this open for replay even
 796                  * though the open was committed. b=3632, b=3633 */
 797                 spin_lock(&mod->mod_open_req->rq_lock);
 798                 mod->mod_open_req->rq_replay = 0;
 799                 spin_unlock(&mod->mod_open_req->rq_lock);
 800         } else {
 801                  CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 802         }
 803
 804         mdc_close_pack(req, op_data);
 805
 806         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
 807                              obd->u.cli.cl_max_mds_easize);
 808         req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
 809                              obd->u.cli.cl_max_mds_cookiesize);
 810
 811         ptlrpc_request_set_replen(req);
 812
 813         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 814         rc = ptlrpc_queue_wait(req);
 815         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 816
 817         if (req->rq_repmsg == NULL) {
 818                 CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
 819                        req->rq_status);
 820                 if (rc == 0)
 821                         rc = req->rq_status ?: -EIO;
 822         } else if (rc == 0 || rc == -EAGAIN) {
 823                 struct mdt_body *body;
 824
 825                 rc = lustre_msg_get_status(req->rq_repmsg);
 826                 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
 827                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
 828                                   "= %d", rc);
 829                         if (rc > 0)
 830                                 rc = -rc;
 831                 } else if (mod == NULL) {
 832                         if (req->rq_import->imp_replayable)
 833                                 CERROR("Unexpected: can't find md_open_data,"
 834                                        "but close succeeded with replayable imp"
 835                                        "Please tell "
 836                                        "http://bugzilla.lustre.org/\n");
 837                 }
 838
 839                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 840                 if (body == NULL)
 841                         rc = -EPROTO;
 842         }
 843
 844         *request = req;
 845         RETURN(rc);
 846 }
 847
 848 int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 849                      struct md_open_data *mod)
 850 {
 851         struct obd_device     *obd = class_exp2obd(exp);
 852         struct ptlrpc_request *req;
 853         int                    rc;
 854         ENTRY;
 855
 856         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 857                                    &RQF_MDS_DONE_WRITING);
 858         if (req == NULL)
 859                 RETURN(-ENOMEM);
 860
 861         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 862         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_DONE_WRITING);
 863         if (rc) {
 864                 ptlrpc_request_free(req);
 865                 RETURN(rc);
 866         }
 867
 868         if (mod != NULL) {
 869                 LASSERTF(mod->mod_open_req->rq_type != LI_POISON,
 870                          "POISONED setattr %p!\n", mod->mod_open_req);
 871
 872                 mod->mod_close_req = req;
 873                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched setattr");
 874                 /* We no longer want to preserve this open for replay even
 875                  * though the open was committed. b=3632, b=3633 */
 876                 spin_lock(&mod->mod_open_req->rq_lock);
 877                 mod->mod_open_req->rq_replay = 0;
 878                 spin_unlock(&mod->mod_open_req->rq_lock);
 879         }
 880
 881         mdc_close_pack(req, op_data);
 882         ptlrpc_request_set_replen(req);
 883
 884         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 885         rc = ptlrpc_queue_wait(req);
 886         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 887
 888         ptlrpc_req_finished(req);
 889         RETURN(rc);
 890 }
 891
 892 #ifdef HAVE_SPLIT_SUPPORT
 893 int mdc_sendpage(struct obd_export *exp, const struct lu_fid *fid,
 894                  const struct page *page, int offset)
 895 {
 896         struct ptlrpc_request   *req;
 897         struct ptlrpc_bulk_desc *desc;
 898         int                      rc;
 899         ENTRY;
 900
 901         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_WRITEPAGE);
 902         if (req == NULL)
 903                 RETURN(-ENOMEM);
 904
 905         /* FIXME: capa doesn't support split yet */
 906         mdc_set_capa_size(req, &RMF_CAPA1, NULL);
 907
 908         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_WRITEPAGE);
 909         if (rc) {
 910                 ptlrpc_request_free(req);
 911                 RETURN(rc);
 912         }
 913
 914         req->rq_request_portal = MDS_READPAGE_PORTAL;
 915         ptlrpc_at_set_req_timeout(req);
 916
 917         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_GET_SOURCE, MDS_BULK_PORTAL);
 918         if (desc == NULL)
 919                 GOTO(out, rc = -ENOMEM);
 920
 921         /* NB req now owns desc and will free it when it gets freed. */
 922         ptlrpc_prep_bulk_page(desc, (struct page *)page, 0, offset);
 923         mdc_readdir_pack(req, 0, offset, fid, NULL);
 924
 925         ptlrpc_request_set_replen(req);
 926         rc = ptlrpc_queue_wait(req);
 927         if (rc)
 928                 GOTO(out, rc);
 929
 930         rc = sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk);
 931 out:
 932         ptlrpc_req_finished(req);
 933         return rc;
 934 }
 935 EXPORT_SYMBOL(mdc_sendpage);
 936 #endif
 937
 938 int mdc_readpage(struct obd_export *exp, const struct lu_fid *fid,
 939                  struct obd_capa *oc, __u64 offset, struct page *page,
 940                  struct ptlrpc_request **request)
 941 {
 942         struct ptlrpc_request   *req;
 943         struct ptlrpc_bulk_desc *desc;
 944         int                      rc;
 945         ENTRY;
 946
 947         *request = NULL;
 948         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
 949         if (req == NULL)
 950                 RETURN(-ENOMEM);
 951
 952         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 953
 954         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
 955         if (rc) {
 956                 ptlrpc_request_free(req);
 957                 RETURN(rc);
 958         }
 959
 960         req->rq_request_portal = MDS_READPAGE_PORTAL;
 961         ptlrpc_at_set_req_timeout(req);
 962
 963         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_PUT_SINK, MDS_BULK_PORTAL);
 964         if (desc == NULL) {
 965                 ptlrpc_request_free(req);
 966                 RETURN(-ENOMEM);
 967         }
 968
 969         /* NB req now owns desc and will free it when it gets freed */
 970         ptlrpc_prep_bulk_page(desc, page, 0, CFS_PAGE_SIZE);
 971         mdc_readdir_pack(req, offset, CFS_PAGE_SIZE, fid, oc);
 972
 973         ptlrpc_request_set_replen(req);
 974         rc = ptlrpc_queue_wait(req);
 975         if (rc) {
 976                 ptlrpc_req_finished(req);
 977                 RETURN(rc);
 978         }
 979
 980         rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
 981                                           req->rq_bulk->bd_nob_transferred);
 982         if (rc < 0) {
 983                 ptlrpc_req_finished(req);
 984                 RETURN(rc);
 985         }
 986
 987         if (req->rq_bulk->bd_nob_transferred != CFS_PAGE_SIZE) {
 988                 CERROR("Unexpected # bytes transferred: %d (%ld expected)\n",
 989                         req->rq_bulk->bd_nob_transferred, CFS_PAGE_SIZE);
 990                 ptlrpc_req_finished(req);
 991                 RETURN(-EPROTO);
 992         }
 993
 994         *request = req;
 995         RETURN(0);
 996 }
 997
 998 /* This routine is quite similar to mdt_ioc_fid2path() */
 999 int mdc_ioc_fid2path(struct obd_export *exp, struct obd_ioctl_data *data)
1000 {
1001         struct getinfo_fid2path *fp = NULL;
1002         int keylen = size_round(sizeof(KEY_FID2PATH)) + sizeof(*fp);
1003         int pathlen = data->ioc_plen1;
1004         __u32 vallen = pathlen + sizeof(*fp);
1005         int alloclen = keylen + vallen;
1006         void *buf;
1007         int rc;
1008
1009         if (pathlen > PATH_MAX)
1010                 RETURN(-EINVAL);
1011         if (pathlen < 2)
1012                 RETURN(-EINVAL);
1013
1014         OBD_ALLOC(buf, alloclen);
1015         if (buf == NULL)
1016                 RETURN(-ENOMEM);
1017         fp = buf + size_round(sizeof(KEY_FID2PATH));
1018         memcpy(buf, KEY_FID2PATH, sizeof(KEY_FID2PATH));
1019         memcpy(&fp->gf_fid, data->ioc_inlbuf1, sizeof(struct lu_fid));
1020         memcpy(&fp->gf_recno, data->ioc_inlbuf2, sizeof(fp->gf_recno));
1021         memcpy(&fp->gf_linkno, data->ioc_inlbuf3,
1022                sizeof(fp->gf_linkno));
1023         fp->gf_pathlen = pathlen;
1024
1025         CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%d\n",
1026                PFID(&fp->gf_fid), fp->gf_recno, fp->gf_linkno);
1027
1028         if (!fid_is_sane(&fp->gf_fid))
1029                 GOTO(out, rc = -EINVAL);
1030
1031         rc = obd_get_info(exp, keylen, buf, &vallen, fp, NULL);
1032         if (rc)
1033                 GOTO(out, rc);
1034
1035         if (vallen < sizeof(*fp) + 1)
1036                 GOTO(out, rc = -EPROTO);
1037         else if (vallen - sizeof(*fp) > pathlen)
1038                 GOTO(out, rc = -EOVERFLOW);
1039         if (copy_to_user(data->ioc_pbuf1, fp->gf_path,
1040                          pathlen))
1041                 GOTO(out, rc = -EFAULT);
1042         memcpy(data->ioc_inlbuf2, &fp->gf_recno, sizeof(fp->gf_recno));
1043         memcpy(data->ioc_inlbuf3, &fp->gf_linkno,
1044                sizeof(fp->gf_linkno));
1045
1046 out:
1047         OBD_FREE(buf, alloclen);
1048
1049         return rc;
1050 }
1051
1052 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1053                          void *karg, void *uarg)
1054 {
1055         struct obd_device *obd = exp->exp_obd;
1056         struct obd_ioctl_data *data = karg;
1057         struct obd_import *imp = obd->u.cli.cl_import;
1058         struct llog_ctxt *ctxt;
1059         int rc;
1060         ENTRY;
1061
1062         if (!try_module_get(THIS_MODULE)) {
1063                 CERROR("Can't get module. Is it alive?");
1064                 return -EINVAL;
1065         }
1066         switch (cmd) {
1067         case OBD_IOC_CHANGELOG_CLEAR: {
1068                 struct ioc_changelog_clear *icc = karg;
1069                 struct changelog_setinfo cs =
1070                         {icc->icc_recno, icc->icc_id};
1071                 rc = obd_set_info_async(exp, strlen(KEY_CHANGELOG_CLEAR),
1072                                         KEY_CHANGELOG_CLEAR, sizeof(cs), &cs,
1073                                         NULL);
1074                 GOTO(out, rc);
1075         }
1076         case OBD_IOC_FID2PATH: {
1077                 rc = mdc_ioc_fid2path(exp, data);
1078                 GOTO(out, rc);
1079         }
1080         case OBD_IOC_CLIENT_RECOVER:
1081                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1);
1082                 if (rc < 0)
1083                         GOTO(out, rc);
1084                 GOTO(out, rc = 0);
1085         case IOC_OSC_SET_ACTIVE:
1086                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
1087                 GOTO(out, rc);
1088         case OBD_IOC_PARSE: {
1089                 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
1090                 rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
1091                 llog_ctxt_put(ctxt);
1092                 GOTO(out, rc);
1093         }
1094 #ifdef __KERNEL__
1095         case OBD_IOC_LLOG_INFO:
1096         case OBD_IOC_LLOG_PRINT: {
1097                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1098                 rc = llog_ioctl(ctxt, cmd, data);
1099                 llog_ctxt_put(ctxt);
1100                 GOTO(out, rc);
1101         }
1102 #endif
1103         case OBD_IOC_POLL_QUOTACHECK:
1104                 rc = lquota_poll_check(quota_interface, exp,
1105                                        (struct if_quotacheck *)karg);
1106                 GOTO(out, rc);
1107         case OBD_IOC_PING_TARGET:
1108                 rc = ptlrpc_obd_ping(obd);
1109                 GOTO(out, rc);
1110         default:
1111                 CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd);
1112                 GOTO(out, rc = -ENOTTY);
1113         }
1114 out:
1115         module_put(THIS_MODULE);
1116
1117         return rc;
1118 }
1119
1120 static int do_set_info_async(struct obd_export *exp,
1121                              obd_count keylen, void *key,
1122                              obd_count vallen, void *val,
1123                              struct ptlrpc_request_set *set)
1124 {
1125         struct obd_import     *imp = class_exp2cliimp(exp);
1126         struct ptlrpc_request *req;
1127         char                  *tmp;
1128         int                    rc;
1129         ENTRY;
1130
1131         req = ptlrpc_request_alloc(imp, &RQF_MDS_SET_INFO);
1132         if (req == NULL)
1133                 RETURN(-ENOMEM);
1134
1135         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
1136                              RCL_CLIENT, keylen);
1137         req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
1138                              RCL_CLIENT, vallen);
1139         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SET_INFO);
1140         if (rc) {
1141                 ptlrpc_request_free(req);
1142                 RETURN(rc);
1143         }
1144
1145         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1146         memcpy(tmp, key, keylen);
1147         tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1148         memcpy(tmp, val, vallen);
1149
1150         ptlrpc_request_set_replen(req);
1151
1152         if (set) {
1153                 ptlrpc_set_add_req(set, req);
1154                 ptlrpc_check_set(NULL, set);
1155         } else {
1156                 rc = ptlrpc_queue_wait(req);
1157                 ptlrpc_req_finished(req);
1158         }
1159
1160         RETURN(rc);
1161 }
1162
1163 int mdc_get_info_rpc(struct obd_export *exp,
1164                      obd_count keylen, void *key,
1165                      int vallen, void *val)
1166 {
1167         struct obd_import      *imp = class_exp2cliimp(exp);
1168         struct ptlrpc_request  *req;
1169         char                   *tmp;
1170         int                     rc = -EINVAL;
1171         ENTRY;
1172
1173         req = ptlrpc_request_alloc(imp, &RQF_MDS_GET_INFO);
1174         if (req == NULL)
1175                 RETURN(-ENOMEM);
1176
1177         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY,
1178                              RCL_CLIENT, keylen);
1179         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VALLEN,
1180                              RCL_CLIENT, sizeof(__u32));
1181
1182         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GET_INFO);
1183         if (rc) {
1184                 ptlrpc_request_free(req);
1185                 RETURN(rc);
1186         }
1187
1188         tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_KEY);
1189         memcpy(tmp, key, keylen);
1190         tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_VALLEN);
1191         memcpy(tmp, &vallen, sizeof(__u32));
1192
1193         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VAL,
1194                              RCL_SERVER, vallen);
1195         ptlrpc_request_set_replen(req);
1196
1197         rc = ptlrpc_queue_wait(req);
1198         if (!rc) {
1199                 tmp = req_capsule_server_get(&req->rq_pill, &RMF_GETINFO_VAL);
1200                 memcpy(val, tmp, vallen);
1201                 if (lustre_msg_swabbed(req->rq_repmsg)) {
1202                         if (KEY_IS(KEY_FID2PATH)) {
1203                                 lustre_swab_fid2path(val);
1204                         }
1205                 }
1206         }
1207         ptlrpc_req_finished(req);
1208
1209         RETURN(rc);
1210 }
1211
1212 int mdc_set_info_async(struct obd_export *exp,
1213                        obd_count keylen, void *key,
1214                        obd_count vallen, void *val,
1215                        struct ptlrpc_request_set *set)
1216 {
1217         struct obd_import *imp = class_exp2cliimp(exp);
1218         int                rc = -EINVAL;
1219         ENTRY;
1220
1221         if (KEY_IS(KEY_INIT_RECOV)) {
1222                 if (vallen != sizeof(int))
1223                         RETURN(-EINVAL);
1224                 spin_lock(&imp->imp_lock);
1225                 imp->imp_initial_recov = *(int *)val;
1226                 spin_unlock(&imp->imp_lock);
1227                 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
1228                        exp->exp_obd->obd_name, imp->imp_initial_recov);
1229                 RETURN(0);
1230         }
1231         /* Turn off initial_recov after we try all backup servers once */
1232         if (KEY_IS(KEY_INIT_RECOV_BACKUP)) {
1233                 if (vallen != sizeof(int))
1234                         RETURN(-EINVAL);
1235                 spin_lock(&imp->imp_lock);
1236                 imp->imp_initial_recov_bk = *(int *)val;
1237                 if (imp->imp_initial_recov_bk)
1238                         imp->imp_initial_recov = 1;
1239                 spin_unlock(&imp->imp_lock);
1240                 CDEBUG(D_HA, "%s: set imp_initial_recov_bk = %d\n",
1241                        exp->exp_obd->obd_name, imp->imp_initial_recov_bk);
1242                 RETURN(0);
1243         }
1244         if (KEY_IS(KEY_READ_ONLY)) {
1245                 if (vallen != sizeof(int))
1246                         RETURN(-EINVAL);
1247
1248                 spin_lock(&imp->imp_lock);
1249                 if (*((int *)val)) {
1250                         imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
1251                         imp->imp_connect_data.ocd_connect_flags |= OBD_CONNECT_RDONLY;
1252                 } else {
1253                         imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
1254                         imp->imp_connect_data.ocd_connect_flags &= ~OBD_CONNECT_RDONLY;
1255                 }
1256                 spin_unlock(&imp->imp_lock);
1257
1258                 rc = do_set_info_async(exp, keylen, key, vallen, val, set);
1259                 RETURN(rc);
1260         }
1261         if (KEY_IS(KEY_SPTLRPC_CONF)) {
1262                 sptlrpc_conf_client_adapt(exp->exp_obd);
1263                 RETURN(0);
1264         }
1265         if (KEY_IS(KEY_FLUSH_CTX)) {
1266                 sptlrpc_import_flush_my_ctx(imp);
1267                 RETURN(0);
1268         }
1269         if (KEY_IS(KEY_MDS_CONN)) {
1270                 struct obd_import *imp = class_exp2cliimp(exp);
1271
1272                 /* mds-mds import */
1273                 spin_lock(&imp->imp_lock);
1274                 imp->imp_server_timeout = 1;
1275                 spin_unlock(&imp->imp_lock);
1276                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1277                 CDEBUG(D_OTHER, "%s: timeout / 2\n", exp->exp_obd->obd_name);
1278                 RETURN(0);
1279         }
1280         if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
1281                 rc = do_set_info_async(exp, keylen, key, vallen, val, set);
1282                 RETURN(rc);
1283         }
1284
1285         RETURN(rc);
1286 }
1287
1288 int mdc_get_info(struct obd_export *exp, __u32 keylen, void *key,
1289                  __u32 *vallen, void *val, struct lov_stripe_md *lsm)
1290 {
1291         int rc = -EINVAL;
1292
1293         if (KEY_IS(KEY_MAX_EASIZE)) {
1294                 int mdsize, *max_easize;
1295
1296                 if (*vallen != sizeof(int))
1297                         RETURN(-EINVAL);
1298                 mdsize = *(int*)val;
1299                 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
1300                         exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
1301                 max_easize = val;
1302                 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
1303                 RETURN(0);
1304         }
1305         if (KEY_IS(KEY_CONN_DATA)) {
1306                 struct obd_import *imp = class_exp2cliimp(exp);
1307                 struct obd_connect_data *data = val;
1308
1309                 if (*vallen != sizeof(*data))
1310                         RETURN(-EINVAL);
1311
1312                 *data = imp->imp_connect_data;
1313                 RETURN(0);
1314         }
1315
1316         rc = mdc_get_info_rpc(exp, keylen, key, *vallen, val);
1317
1318         RETURN(rc);
1319 }
1320
1321 static int mdc_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1322                       __u64 max_age, __u32 flags)
1323 {
1324         struct ptlrpc_request *req;
1325         struct obd_statfs     *msfs;
1326         struct obd_import     *imp = NULL;
1327         int                    rc;
1328         ENTRY;
1329
1330
1331         /*Since the request might also come from lprocfs, so we need
1332          *sync this with client_disconnect_export Bug15684*/
1333         down_read(&obd->u.cli.cl_sem);
1334         if (obd->u.cli.cl_import)
1335                 imp = class_import_get(obd->u.cli.cl_import);
1336         up_read(&obd->u.cli.cl_sem);
1337         if (!imp)
1338                 RETURN(-ENODEV);
1339
1340         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_STATFS,
1341                                         LUSTRE_MDS_VERSION, MDS_STATFS);
1342         if (req == NULL)
1343                 GOTO(output, rc = -ENOMEM);
1344
1345         ptlrpc_request_set_replen(req);
1346
1347         if (flags & OBD_STATFS_NODELAY) {
1348                 /* procfs requests not want stay in wait for avoid deadlock */
1349                 req->rq_no_resend = 1;
1350                 req->rq_no_delay = 1;
1351         }
1352
1353         rc = ptlrpc_queue_wait(req);
1354         if (rc) {
1355                 /* check connection error first */
1356                 if (imp->imp_connect_error)
1357                         rc = imp->imp_connect_error;
1358                 GOTO(out, rc);
1359         }
1360
1361         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1362         if (msfs == NULL)
1363                 GOTO(out, rc = -EPROTO);
1364
1365         *osfs = *msfs;
1366         EXIT;
1367 out:
1368         ptlrpc_req_finished(req);
1369 output:
1370         class_import_put(imp);
1371         return rc;
1372 }
1373
1374 static int mdc_pin(struct obd_export *exp, const struct lu_fid *fid,
1375                    struct obd_capa *oc, struct obd_client_handle *handle,
1376                    int flags)
1377 {
1378         struct ptlrpc_request *req;
1379         struct mdt_body       *body;
1380         int                    rc;
1381         ENTRY;
1382
1383         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_PIN);
1384         if (req == NULL)
1385                 RETURN(-ENOMEM);
1386
1387         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1388
1389         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_PIN);
1390         if (rc) {
1391                 ptlrpc_request_free(req);
1392                 RETURN(rc);
1393         }
1394
1395         mdc_pack_body(req, fid, oc, 0, 0, -1, flags);
1396
1397         ptlrpc_request_set_replen(req);
1398
1399         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1400         rc = ptlrpc_queue_wait(req);
1401         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1402         if (rc) {
1403                 CERROR("Pin failed: %d\n", rc);
1404                 GOTO(err_out, rc);
1405         }
1406
1407         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1408         if (body == NULL)
1409                 GOTO(err_out, rc = -EPROTO);
1410
1411         handle->och_fh = body->handle;
1412         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
1413
1414         OBD_ALLOC_PTR(handle->och_mod);
1415         if (handle->och_mod == NULL) {
1416                 DEBUG_REQ(D_ERROR, req, "can't allocate md_open_data");
1417                 GOTO(err_out, rc = -ENOMEM);
1418         }
1419         handle->och_mod->mod_open_req = req; /* will be dropped by unpin */
1420
1421         RETURN(0);
1422
1423 err_out:
1424         ptlrpc_req_finished(req);
1425         RETURN(rc);
1426 }
1427
1428 static int mdc_unpin(struct obd_export *exp, struct obd_client_handle *handle,
1429                      int flag)
1430 {
1431         struct ptlrpc_request *req;
1432         struct mdt_body       *body;
1433         int                    rc;
1434         ENTRY;
1435
1436         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_UNPIN,
1437                                         LUSTRE_MDS_VERSION, MDS_UNPIN);
1438         if (req == NULL)
1439                 RETURN(-ENOMEM);
1440
1441         body = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY);
1442         body->handle = handle->och_fh;
1443         body->flags = flag;
1444
1445         ptlrpc_request_set_replen(req);
1446
1447         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1448         rc = ptlrpc_queue_wait(req);
1449         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1450
1451         if (rc != 0)
1452                 CERROR("Unpin failed: %d\n", rc);
1453
1454         ptlrpc_req_finished(req);
1455         ptlrpc_req_finished(handle->och_mod->mod_open_req);
1456
1457         OBD_FREE(handle->och_mod, sizeof(*handle->och_mod));
1458         RETURN(rc);
1459 }
1460
1461 int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
1462              struct obd_capa *oc, struct ptlrpc_request **request)
1463 {
1464         struct ptlrpc_request *req;
1465         int                    rc;
1466         ENTRY;
1467
1468         *request = NULL;
1469         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
1470         if (req == NULL)
1471                 RETURN(-ENOMEM);
1472
1473         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1474
1475         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
1476         if (rc) {
1477                 ptlrpc_request_free(req);
1478                 RETURN(rc);
1479         }
1480
1481         mdc_pack_body(req, fid, oc, 0, 0, -1, 0);
1482
1483         ptlrpc_request_set_replen(req);
1484
1485         rc = ptlrpc_queue_wait(req);
1486         if (rc)
1487                 ptlrpc_req_finished(req);
1488         else
1489                 *request = req;
1490         RETURN(rc);
1491 }
1492
1493 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
1494                             enum obd_import_event event)
1495 {
1496         int rc = 0;
1497
1498         LASSERT(imp->imp_obd == obd);
1499
1500         switch (event) {
1501         case IMP_EVENT_DISCON: {
1502 #if 0
1503                 /* XXX Pass event up to OBDs stack. used only for FLD now */
1504                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
1505 #endif
1506                 break;
1507         }
1508         case IMP_EVENT_INACTIVE: {
1509                 struct client_obd *cli = &obd->u.cli;
1510                 /*
1511                  * Flush current sequence to make client obtain new one
1512                  * from server in case of disconnect/reconnect.
1513                  * If range is already empty then no need to flush it.
1514                  */
1515                 if (cli->cl_seq != NULL &&
1516                     !range_is_exhausted(&cli->cl_seq->lcs_space)) {
1517                         seq_client_flush(cli->cl_seq);
1518                 }
1519
1520                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
1521                 break;
1522         }
1523         case IMP_EVENT_INVALIDATE: {
1524                 struct ldlm_namespace *ns = obd->obd_namespace;
1525
1526                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
1527
1528                 break;
1529         }
1530         case IMP_EVENT_ACTIVE: {
1531                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
1532                 break;
1533         }
1534         case IMP_EVENT_OCD:
1535                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
1536                 break;
1537
1538         default:
1539                 CERROR("Unknown import event %x\n", event);
1540                 LBUG();
1541         }
1542         RETURN(rc);
1543 }
1544
1545 static int mdc_fid_init(struct obd_export *exp)
1546 {
1547         struct client_obd *cli = &exp->exp_obd->u.cli;
1548         char *prefix;
1549         int rc;
1550         ENTRY;
1551
1552         OBD_ALLOC_PTR(cli->cl_seq);
1553         if (cli->cl_seq == NULL)
1554                 RETURN(-ENOMEM);
1555
1556         OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
1557         if (prefix == NULL)
1558                 GOTO(out_free_seq, rc = -ENOMEM);
1559
1560         snprintf(prefix, MAX_OBD_NAME + 5, "srv-%s",
1561                  exp->exp_obd->obd_name);
1562
1563         /* Init client side sequence-manager */
1564         rc = seq_client_init(cli->cl_seq, exp,
1565                              LUSTRE_SEQ_METADATA,
1566                              prefix, NULL);
1567         OBD_FREE(prefix, MAX_OBD_NAME + 5);
1568         if (rc)
1569                 GOTO(out_free_seq, rc);
1570
1571         RETURN(rc);
1572 out_free_seq:
1573         OBD_FREE_PTR(cli->cl_seq);
1574         cli->cl_seq = NULL;
1575         return rc;
1576 }
1577
1578 static int mdc_fid_fini(struct obd_export *exp)
1579 {
1580         struct client_obd *cli = &exp->exp_obd->u.cli;
1581         ENTRY;
1582
1583         if (cli->cl_seq != NULL) {
1584                 seq_client_fini(cli->cl_seq);
1585                 OBD_FREE_PTR(cli->cl_seq);
1586                 cli->cl_seq = NULL;
1587         }
1588
1589         RETURN(0);
1590 }
1591
1592 int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1593                   struct md_op_data *op_data)
1594 {
1595         struct client_obd *cli = &exp->exp_obd->u.cli;
1596         struct lu_client_seq *seq = cli->cl_seq;
1597         ENTRY;
1598         RETURN(seq_client_alloc_fid(seq, fid));
1599 }
1600
1601 /* XXX This method is used only to clear current fid seq
1602  * once fld/mds insert failed */
1603 static int mdc_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
1604 {
1605         struct client_obd *cli = &exp->exp_obd->u.cli;
1606
1607         seq_client_flush(cli->cl_seq);
1608         return 0;
1609 }
1610
1611 struct obd_uuid *mdc_get_uuid(struct obd_export *exp) {
1612         struct client_obd *cli = &exp->exp_obd->u.cli;
1613         return &cli->cl_target_uuid;
1614 }
1615
1616 static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
1617 {
1618         struct client_obd *cli = &obd->u.cli;
1619         struct lprocfs_static_vars lvars = { 0 };
1620         int rc;
1621         ENTRY;
1622
1623         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1624         if (!cli->cl_rpc_lock)
1625                 RETURN(-ENOMEM);
1626         mdc_init_rpc_lock(cli->cl_rpc_lock);
1627
1628         ptlrpcd_addref();
1629
1630         OBD_ALLOC(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1631         if (!cli->cl_setattr_lock)
1632                 GOTO(err_rpc_lock, rc = -ENOMEM);
1633         mdc_init_rpc_lock(cli->cl_setattr_lock);
1634
1635         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1636         if (!cli->cl_close_lock)
1637                 GOTO(err_setattr_lock, rc = -ENOMEM);
1638         mdc_init_rpc_lock(cli->cl_close_lock);
1639
1640         rc = client_obd_setup(obd, cfg);
1641         if (rc)
1642                 GOTO(err_close_lock, rc);
1643         lprocfs_mdc_init_vars(&lvars);
1644         lprocfs_obd_setup(obd, lvars.obd_vars);
1645         sptlrpc_lprocfs_cliobd_attach(obd);
1646         ptlrpc_lprocfs_register_obd(obd);
1647
1648         rc = obd_llog_init(obd, &obd->obd_olg, obd, 0, NULL, NULL);
1649         if (rc) {
1650                 mdc_cleanup(obd);
1651                 CERROR("failed to setup llogging subsystems\n");
1652         }
1653
1654         RETURN(rc);
1655
1656 err_close_lock:
1657         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1658 err_setattr_lock:
1659         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1660 err_rpc_lock:
1661         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1662         ptlrpcd_decref();
1663         RETURN(rc);
1664 }
1665
1666 /* Initialize the default and maximum LOV EA and cookie sizes.  This allows
1667  * us to make MDS RPCs with large enough reply buffers to hold the
1668  * maximum-sized (= maximum striped) EA and cookie without having to
1669  * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
1670 static int mdc_init_ea_size(struct obd_export *exp, int easize,
1671                      int def_easize, int cookiesize)
1672 {
1673         struct obd_device *obd = exp->exp_obd;
1674         struct client_obd *cli = &obd->u.cli;
1675         ENTRY;
1676
1677         if (cli->cl_max_mds_easize < easize)
1678                 cli->cl_max_mds_easize = easize;
1679
1680         if (cli->cl_default_mds_easize < def_easize)
1681                 cli->cl_default_mds_easize = def_easize;
1682
1683         if (cli->cl_max_mds_cookiesize < cookiesize)
1684                 cli->cl_max_mds_cookiesize = cookiesize;
1685
1686         RETURN(0);
1687 }
1688
1689 static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
1690 {
1691         int rc = 0;
1692         ENTRY;
1693
1694         switch (stage) {
1695         case OBD_CLEANUP_EARLY:
1696         case OBD_CLEANUP_EXPORTS:
1697                 /* If we set up but never connected, the
1698                    client import will not have been cleaned. */
1699                 if (obd->u.cli.cl_import) {
1700                         struct obd_import *imp;
1701                         down_write(&obd->u.cli.cl_sem);
1702                         imp = obd->u.cli.cl_import;
1703                         CERROR("client import never connected\n");
1704                         ptlrpc_invalidate_import(imp);
1705                         class_destroy_import(imp);
1706                         up_write(&obd->u.cli.cl_sem);
1707                         obd->u.cli.cl_import = NULL;
1708                 }
1709                 rc = obd_llog_finish(obd, 0);
1710                 if (rc != 0)
1711                         CERROR("failed to cleanup llogging subsystems\n");
1712                 break;
1713         }
1714         RETURN(rc);
1715 }
1716
1717 static int mdc_cleanup(struct obd_device *obd)
1718 {
1719         struct client_obd *cli = &obd->u.cli;
1720
1721         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
1722         OBD_FREE(cli->cl_setattr_lock, sizeof (*cli->cl_setattr_lock));
1723         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
1724
1725         ptlrpc_lprocfs_unregister_obd(obd);
1726         lprocfs_obd_cleanup(obd);
1727         ptlrpcd_decref();
1728
1729         return client_obd_cleanup(obd);
1730 }
1731
1732
1733 static int mdc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
1734                          struct obd_device *tgt, int count,
1735                          struct llog_catid *logid, struct obd_uuid *uuid)
1736 {
1737         struct llog_ctxt *ctxt;
1738         int rc;
1739         ENTRY;
1740
1741         LASSERT(olg == &obd->obd_olg);
1742
1743         rc = llog_setup(obd, olg, LLOG_LOVEA_REPL_CTXT, tgt, 0, NULL,
1744                         &llog_client_ops);
1745         if (rc)
1746                 RETURN(rc);
1747         ctxt = llog_get_context(obd, LLOG_LOVEA_REPL_CTXT);
1748         llog_initiator_connect(ctxt);
1749         llog_ctxt_put(ctxt);
1750
1751         rc = llog_setup(obd, olg, LLOG_CHANGELOG_REPL_CTXT, tgt, 0, NULL,
1752                         &llog_client_ops);
1753         if (rc == 0) {
1754                 ctxt = llog_group_get_ctxt(olg, LLOG_CHANGELOG_REPL_CTXT);
1755                 llog_initiator_connect(ctxt);
1756                 llog_ctxt_put(ctxt);
1757         }
1758
1759         RETURN(rc);
1760 }
1761
1762 static int mdc_llog_finish(struct obd_device *obd, int count)
1763 {
1764         struct llog_ctxt *ctxt;
1765         int rc = 0;
1766         ENTRY;
1767
1768         ctxt = llog_get_context(obd, LLOG_LOVEA_REPL_CTXT);
1769         if (ctxt)
1770                 rc = llog_cleanup(ctxt);
1771
1772         ctxt = llog_get_context(obd, LLOG_CHANGELOG_REPL_CTXT);
1773         if (ctxt)
1774                 rc = llog_cleanup(ctxt);
1775
1776         RETURN(rc);
1777 }
1778
1779 static int mdc_process_config(struct obd_device *obd, obd_count len, void *buf)
1780 {
1781         struct lustre_cfg *lcfg = buf;
1782         struct lprocfs_static_vars lvars = { 0 };
1783         int rc = 0;
1784
1785         lprocfs_mdc_init_vars(&lvars);
1786         switch (lcfg->lcfg_command) {
1787         default:
1788                 rc = class_process_proc_param(PARAM_MDC, lvars.obd_vars,
1789                                               lcfg, obd);
1790                 if (rc > 0)
1791                         rc = 0;
1792                 break;
1793         }
1794         return(rc);
1795 }
1796
1797
1798 /* get remote permission for current user on fid */
1799 int mdc_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
1800                         struct obd_capa *oc, __u32 suppgid,
1801                         struct ptlrpc_request **request)
1802 {
1803         struct ptlrpc_request  *req;
1804         int                    rc;
1805         ENTRY;
1806
1807         LASSERT(client_is_remote(exp));
1808
1809         *request = NULL;
1810         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
1811         if (req == NULL)
1812                 RETURN(-ENOMEM);
1813
1814         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1815
1816         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
1817         if (rc) {
1818                 ptlrpc_request_free(req);
1819                 RETURN(rc);
1820         }
1821
1822         mdc_pack_body(req, fid, oc, OBD_MD_FLRMTPERM, 0, suppgid, 0);
1823
1824         req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
1825                              sizeof(struct mdt_remote_perm));
1826
1827         ptlrpc_request_set_replen(req);
1828
1829         rc = ptlrpc_queue_wait(req);
1830         if (rc)
1831                 ptlrpc_req_finished(req);
1832         else
1833                 *request = req;
1834         RETURN(rc);
1835 }
1836
1837 static int mdc_interpret_renew_capa(const struct lu_env *env,
1838                                     struct ptlrpc_request *req, void *unused,
1839                                     int status)
1840 {
1841         struct obd_capa *oc = req->rq_async_args.pointer_arg[0];
1842         renew_capa_cb_t cb = req->rq_async_args.pointer_arg[1];
1843         struct mdt_body *body = NULL;
1844         struct lustre_capa *capa;
1845         ENTRY;
1846
1847         if (status)
1848                 GOTO(out, capa = ERR_PTR(status));
1849
1850         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1851         if (body == NULL)
1852                 GOTO(out, capa = ERR_PTR(-EFAULT));
1853
1854         if ((body->valid & OBD_MD_FLOSSCAPA) == 0)
1855                 GOTO(out, capa = ERR_PTR(-ENOENT));
1856
1857         capa = req_capsule_server_get(&req->rq_pill, &RMF_CAPA2);
1858         if (!capa)
1859                 GOTO(out, capa = ERR_PTR(-EFAULT));
1860         EXIT;
1861 out:
1862         cb(oc, capa);
1863         return 0;
1864 }
1865
1866 static int mdc_renew_capa(struct obd_export *exp, struct obd_capa *oc,
1867                           renew_capa_cb_t cb)
1868 {
1869         struct ptlrpc_request *req;
1870         ENTRY;
1871
1872         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_GETATTR,
1873                                         LUSTRE_MDS_VERSION, MDS_GETATTR);
1874         if (req == NULL)
1875                 RETURN(-ENOMEM);
1876
1877         /* NB, OBD_MD_FLOSSCAPA is set here, but it doesn't necessarily mean the
1878          * capa to renew is oss capa.
1879          */
1880         mdc_pack_body(req, &oc->c_capa.lc_fid, oc, OBD_MD_FLOSSCAPA, 0, -1, 0);
1881         ptlrpc_request_set_replen(req);
1882
1883         req->rq_async_args.pointer_arg[0] = oc;
1884         req->rq_async_args.pointer_arg[1] = cb;
1885         req->rq_interpret_reply = mdc_interpret_renew_capa;
1886         ptlrpcd_add_req(req, PSCOPE_OTHER);
1887         RETURN(0);
1888 }
1889
1890 static int mdc_connect(const struct lu_env *env,
1891                        struct obd_export **exp,
1892                        struct obd_device *obd, struct obd_uuid *cluuid,
1893                        struct obd_connect_data *data,
1894                        void *localdata)
1895 {
1896         struct obd_import *imp = obd->u.cli.cl_import;
1897
1898         /* mds-mds import features */
1899         if (data && (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS)) {
1900                 spin_lock(&imp->imp_lock);
1901                 imp->imp_server_timeout = 1;
1902                 spin_unlock(&imp->imp_lock);
1903                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1904                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
1905                        obd->obd_name);
1906         }
1907
1908         return client_connect_import(env, exp, obd, cluuid, data, NULL);
1909 }
1910
1911 struct obd_ops mdc_obd_ops = {
1912         .o_owner            = THIS_MODULE,
1913         .o_setup            = mdc_setup,
1914         .o_precleanup       = mdc_precleanup,
1915         .o_cleanup          = mdc_cleanup,
1916         .o_add_conn         = client_import_add_conn,
1917         .o_del_conn         = client_import_del_conn,
1918         .o_connect          = mdc_connect,
1919         .o_disconnect       = client_disconnect_export,
1920         .o_iocontrol        = mdc_iocontrol,
1921         .o_set_info_async   = mdc_set_info_async,
1922         .o_statfs           = mdc_statfs,
1923         .o_pin              = mdc_pin,
1924         .o_unpin            = mdc_unpin,
1925         .o_fid_init         = mdc_fid_init,
1926         .o_fid_fini         = mdc_fid_fini,
1927         .o_fid_alloc        = mdc_fid_alloc,
1928         .o_fid_delete       = mdc_fid_delete,
1929         .o_import_event     = mdc_import_event,
1930         .o_llog_init        = mdc_llog_init,
1931         .o_llog_finish      = mdc_llog_finish,
1932         .o_get_info         = mdc_get_info,
1933         .o_process_config   = mdc_process_config,
1934         .o_get_uuid         = mdc_get_uuid,
1935 };
1936
1937 struct md_ops mdc_md_ops = {
1938         .m_getstatus        = mdc_getstatus,
1939         .m_change_cbdata    = mdc_change_cbdata,
1940         .m_close            = mdc_close,
1941         .m_create           = mdc_create,
1942         .m_done_writing     = mdc_done_writing,
1943         .m_enqueue          = mdc_enqueue,
1944         .m_getattr          = mdc_getattr,
1945         .m_getattr_name     = mdc_getattr_name,
1946         .m_intent_lock      = mdc_intent_lock,
1947         .m_link             = mdc_link,
1948         .m_is_subdir        = mdc_is_subdir,
1949         .m_rename           = mdc_rename,
1950         .m_setattr          = mdc_setattr,
1951         .m_setxattr         = mdc_setxattr,
1952         .m_getxattr         = mdc_getxattr,
1953         .m_sync             = mdc_sync,
1954         .m_readpage         = mdc_readpage,
1955         .m_unlink           = mdc_unlink,
1956         .m_cancel_unused    = mdc_cancel_unused,
1957         .m_init_ea_size     = mdc_init_ea_size,
1958         .m_set_lock_data    = mdc_set_lock_data,
1959         .m_lock_match       = mdc_lock_match,
1960         .m_get_lustre_md    = mdc_get_lustre_md,
1961         .m_free_lustre_md   = mdc_free_lustre_md,
1962         .m_set_open_replay_data = mdc_set_open_replay_data,
1963         .m_clear_open_replay_data = mdc_clear_open_replay_data,
1964         .m_renew_capa       = mdc_renew_capa,
1965         .m_unpack_capa      = mdc_unpack_capa,
1966         .m_get_remote_perm  = mdc_get_remote_perm,
1967         .m_intent_getattr_async = mdc_intent_getattr_async,
1968         .m_revalidate_lock      = mdc_revalidate_lock
1969 };
1970
1971 int __init mdc_init(void)
1972 {
1973         int rc;
1974         struct lprocfs_static_vars lvars = { 0 };
1975         lprocfs_mdc_init_vars(&lvars);
1976
1977         request_module("lquota");
1978         quota_interface = PORTAL_SYMBOL_GET(mdc_quota_interface);
1979         init_obd_quota_ops(quota_interface, &mdc_obd_ops);
1980
1981         rc = class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
1982                                  LUSTRE_MDC_NAME, NULL);
1983         if (rc && quota_interface)
1984                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1985
1986         RETURN(rc);
1987 }
1988
1989 #ifdef __KERNEL__
1990 static void /*__exit*/ mdc_exit(void)
1991 {
1992         if (quota_interface)
1993                 PORTAL_SYMBOL_PUT(mdc_quota_interface);
1994
1995         class_unregister_type(LUSTRE_MDC_NAME);
1996 }
1997
1998 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
1999 MODULE_DESCRIPTION("Lustre Metadata Client");
2000 MODULE_LICENSE("GPL");
2001
2002 module_init(mdc_init);
2003 module_exit(mdc_exit);
2004 #endif