lustre/mdc/mdc_request.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
  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 #define DEBUG_SUBSYSTEM S_MDC
  38
  39 #ifdef __KERNEL__
  40 # include <linux/module.h>
  41 # include <linux/pagemap.h>
  42 # include <linux/miscdevice.h>
  43 # include <linux/init.h>
  44 #else
  45 # include <liblustre.h>
  46 #endif
  47
  48 #include <lustre_acl.h>
  49 #include <obd_class.h>
  50 #include <lustre_fid.h>
  51 #include <md_object.h>
  52 #include <lprocfs_status.h>
  53 #include <lustre_param.h>
  54 #include <lustre_log.h>
  55
  56 #include "mdc_internal.h"
  57
  58 #define REQUEST_MINOR 244
  59
  60 struct mdc_renew_capa_args {
  61         struct obd_capa        *ra_oc;
  62         renew_capa_cb_t         ra_cb;
  63 };
  64
  65 static int mdc_cleanup(struct obd_device *obd);
  66
  67 int mdc_unpack_capa(struct obd_export *exp, struct ptlrpc_request *req,
  68                     const struct req_msg_field *field, struct obd_capa **oc)
  69 {
  70         struct lustre_capa *capa;
  71         struct obd_capa *c;
  72         ENTRY;
  73
  74         /* swabbed already in mdc_enqueue */
  75         capa = req_capsule_server_get(&req->rq_pill, field);
  76         if (capa == NULL)
  77                 RETURN(-EPROTO);
  78
  79         c = alloc_capa(CAPA_SITE_CLIENT);
  80         if (IS_ERR(c)) {
  81                 CDEBUG(D_INFO, "alloc capa failed!\n");
  82                 RETURN(PTR_ERR(c));
  83         } else {
  84                 c->c_capa = *capa;
  85                 *oc = c;
  86                 RETURN(0);
  87         }
  88 }
  89
  90 /* Helper that implements most of mdc_getstatus and signal_completed_replay. */
  91 /* XXX this should become mdc_get_info("key"), sending MDS_GET_INFO RPC */
  92 static int send_getstatus(struct obd_import *imp, struct lu_fid *rootfid,
  93                           struct obd_capa **pc, int level, int msg_flags)
  94 {
  95         struct ptlrpc_request *req;
  96         struct mdt_body       *body;
  97         int                    rc;
  98         ENTRY;
  99
 100         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_GETSTATUS,
 101                                         LUSTRE_MDS_VERSION, MDS_GETSTATUS);
 102         if (req == NULL)
 103                 RETURN(-ENOMEM);
 104
 105         mdc_pack_body(req, NULL, NULL, 0, 0, -1, 0);
 106         lustre_msg_add_flags(req->rq_reqmsg, msg_flags);
 107         req->rq_send_state = level;
 108
 109         ptlrpc_request_set_replen(req);
 110
 111         rc = ptlrpc_queue_wait(req);
 112         if (rc)
 113                 GOTO(out, rc);
 114
 115         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 116         if (body == NULL)
 117                 GOTO(out, rc = -EPROTO);
 118
 119         if (body->valid & OBD_MD_FLMDSCAPA) {
 120                 rc = mdc_unpack_capa(NULL, req, &RMF_CAPA1, pc);
 121                 if (rc)
 122                         GOTO(out, rc);
 123         }
 124
 125         *rootfid = body->fid1;
 126         CDEBUG(D_NET,
 127                "root fid="DFID", last_committed="LPU64"\n",
 128                PFID(rootfid),
 129                lustre_msg_get_last_committed(req->rq_repmsg));
 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  * will contain 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 shrinks 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 aware of RPC
 152  * layouts.  --umka
 153  */
 154 static int mdc_getattr_common(struct obd_export *exp,
 155                               struct ptlrpc_request *req)
 156 {
 157         struct req_capsule *pill = &req->rq_pill;
 158         struct mdt_body    *body;
 159         void               *eadata;
 160         int                 rc;
 161         ENTRY;
 162
 163         /* Request message already built. */
 164         rc = ptlrpc_queue_wait(req);
 165         if (rc != 0)
 166                 RETURN(rc);
 167
 168         /* sanity check for the reply */
 169         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 170         if (body == NULL)
 171                 RETURN(-EPROTO);
 172
 173         CDEBUG(D_NET, "mode: %o\n", body->mode);
 174
 175         if (body->eadatasize != 0) {
 176                 mdc_update_max_ea_from_body(exp, body);
 177
 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, struct md_op_data *op_data,
 205                 struct ptlrpc_request **request)
 206 {
 207         struct ptlrpc_request *req;
 208         int                    rc;
 209         ENTRY;
 210
 211         *request = NULL;
 212         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
 213         if (req == NULL)
 214                 RETURN(-ENOMEM);
 215
 216         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 217
 218         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
 219         if (rc) {
 220                 ptlrpc_request_free(req);
 221                 RETURN(rc);
 222         }
 223
 224         mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
 225                       op_data->op_valid, op_data->op_mode, -1, 0);
 226
 227         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
 228                              op_data->op_mode);
 229         if (op_data->op_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, struct md_op_data *op_data,
 245                      struct ptlrpc_request **request)
 246 {
 247         struct ptlrpc_request *req;
 248         int                    rc;
 249         ENTRY;
 250
 251         *request = NULL;
 252         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 253                                    &RQF_MDS_GETATTR_NAME);
 254         if (req == NULL)
 255                 RETURN(-ENOMEM);
 256
 257         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 258         req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
 259                              op_data->op_namelen + 1);
 260
 261         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR_NAME);
 262         if (rc) {
 263                 ptlrpc_request_free(req);
 264                 RETURN(rc);
 265         }
 266
 267         mdc_pack_body(req, &op_data->op_fid1, op_data->op_capa1,
 268                       op_data->op_valid, op_data->op_mode,
 269                       op_data->op_suppgids[0], 0);
 270
 271         if (op_data->op_name) {
 272                 char *name = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 273                 LASSERT(strnlen(op_data->op_name, op_data->op_namelen) ==
 274                                 op_data->op_namelen);
 275                 memcpy(name, op_data->op_name, op_data->op_namelen);
 276         }
 277
 278         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
 279                              op_data->op_mode);
 280         ptlrpc_request_set_replen(req);
 281
 282         rc = mdc_getattr_common(exp, req);
 283         if (rc)
 284                 ptlrpc_req_finished(req);
 285         else
 286                 *request = req;
 287         RETURN(rc);
 288 }
 289
 290 static int mdc_is_subdir(struct obd_export *exp,
 291                          const struct lu_fid *pfid,
 292                          const struct lu_fid *cfid,
 293                          struct ptlrpc_request **request)
 294 {
 295         struct ptlrpc_request  *req;
 296         int                     rc;
 297
 298         ENTRY;
 299
 300         *request = NULL;
 301         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
 302                                         &RQF_MDS_IS_SUBDIR, LUSTRE_MDS_VERSION,
 303                                         MDS_IS_SUBDIR);
 304         if (req == NULL)
 305                 RETURN(-ENOMEM);
 306
 307         mdc_is_subdir_pack(req, pfid, cfid, 0);
 308         ptlrpc_request_set_replen(req);
 309
 310         rc = ptlrpc_queue_wait(req);
 311         if (rc && rc != -EREMOTE)
 312                 ptlrpc_req_finished(req);
 313         else
 314                 *request = req;
 315         RETURN(rc);
 316 }
 317
 318 static int mdc_xattr_common(struct obd_export *exp,const struct req_format *fmt,
 319                             const struct lu_fid *fid,
 320                             struct obd_capa *oc, int opcode, obd_valid valid,
 321                             const char *xattr_name, const char *input,
 322                             int input_size, int output_size, int flags,
 323                             __u32 suppgid, struct ptlrpc_request **request)
 324 {
 325         struct ptlrpc_request *req;
 326         int   xattr_namelen = 0;
 327         char *tmp;
 328         int   rc;
 329         ENTRY;
 330
 331         *request = NULL;
 332         req = ptlrpc_request_alloc(class_exp2cliimp(exp), fmt);
 333         if (req == NULL)
 334                 RETURN(-ENOMEM);
 335
 336         mdc_set_capa_size(req, &RMF_CAPA1, oc);
 337         if (xattr_name) {
 338                 xattr_namelen = strlen(xattr_name) + 1;
 339                 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
 340                                      xattr_namelen);
 341         }
 342         if (input_size) {
 343                 LASSERT(input);
 344                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
 345                                      input_size);
 346         }
 347
 348         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, opcode);
 349         if (rc) {
 350                 ptlrpc_request_free(req);
 351                 RETURN(rc);
 352         }
 353
 354         if (opcode == MDS_REINT) {
 355                 struct mdt_rec_setxattr *rec;
 356
 357                 CLASSERT(sizeof(struct mdt_rec_setxattr) ==
 358                          sizeof(struct mdt_rec_reint));
 359                 rec = req_capsule_client_get(&req->rq_pill, &RMF_REC_REINT);
 360                 rec->sx_opcode = REINT_SETXATTR;
 361                 /* TODO:
 362                  *  cfs_curproc_fs{u,g}id() should replace
 363                  *  current->fs{u,g}id for portability.
 364                  */
 365                 rec->sx_fsuid  = cfs_curproc_fsuid();
 366                 rec->sx_fsgid  = cfs_curproc_fsgid();
 367                 rec->sx_cap    = cfs_curproc_cap_pack();
 368                 rec->sx_suppgid1 = suppgid;
 369                 rec->sx_suppgid2 = -1;
 370                 rec->sx_fid    = *fid;
 371                 rec->sx_valid  = valid | OBD_MD_FLCTIME;
 372                 rec->sx_time   = cfs_time_current_sec();
 373                 rec->sx_size   = output_size;
 374                 rec->sx_flags  = flags;
 375
 376                 mdc_pack_capa(req, &RMF_CAPA1, oc);
 377         } else {
 378                 mdc_pack_body(req, fid, oc, valid, output_size, suppgid, flags);
 379         }
 380
 381         if (xattr_name) {
 382                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_NAME);
 383                 memcpy(tmp, xattr_name, xattr_namelen);
 384         }
 385         if (input_size) {
 386                 tmp = req_capsule_client_get(&req->rq_pill, &RMF_EADATA);
 387                 memcpy(tmp, input, input_size);
 388         }
 389
 390         if (req_capsule_has_field(&req->rq_pill, &RMF_EADATA, RCL_SERVER))
 391                 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
 392                                      RCL_SERVER, output_size);
 393         ptlrpc_request_set_replen(req);
 394
 395         /* make rpc */
 396         if (opcode == MDS_REINT)
 397                 mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 398
 399         rc = ptlrpc_queue_wait(req);
 400
 401         if (opcode == MDS_REINT)
 402                 mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
 403
 404         if (rc)
 405                 ptlrpc_req_finished(req);
 406         else
 407                 *request = req;
 408         RETURN(rc);
 409 }
 410
 411 int mdc_setxattr(struct obd_export *exp, const struct lu_fid *fid,
 412                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 413                  const char *input, int input_size, int output_size,
 414                  int flags, __u32 suppgid, struct ptlrpc_request **request)
 415 {
 416         return mdc_xattr_common(exp, &RQF_MDS_REINT_SETXATTR,
 417                                 fid, oc, MDS_REINT, valid, xattr_name,
 418                                 input, input_size, output_size, flags,
 419                                 suppgid, request);
 420 }
 421
 422 int mdc_getxattr(struct obd_export *exp, const struct lu_fid *fid,
 423                  struct obd_capa *oc, obd_valid valid, const char *xattr_name,
 424                  const char *input, int input_size, int output_size,
 425                  int flags, struct ptlrpc_request **request)
 426 {
 427         return mdc_xattr_common(exp, &RQF_MDS_GETXATTR,
 428                                 fid, oc, MDS_GETXATTR, valid, xattr_name,
 429                                 input, input_size, output_size, flags,
 430                                 -1, request);
 431 }
 432
 433 #ifdef CONFIG_FS_POSIX_ACL
 434 static int mdc_unpack_acl(struct ptlrpc_request *req, struct lustre_md *md)
 435 {
 436         struct req_capsule     *pill = &req->rq_pill;
 437         struct mdt_body        *body = md->body;
 438         struct posix_acl       *acl;
 439         void                   *buf;
 440         int                     rc;
 441         ENTRY;
 442
 443         if (!body->aclsize)
 444                 RETURN(0);
 445
 446         buf = req_capsule_server_sized_get(pill, &RMF_ACL, body->aclsize);
 447
 448         if (!buf)
 449                 RETURN(-EPROTO);
 450
 451         acl = posix_acl_from_xattr(buf, body->aclsize);
 452         if (IS_ERR(acl)) {
 453                 rc = PTR_ERR(acl);
 454                 CERROR("convert xattr to acl: %d\n", rc);
 455                 RETURN(rc);
 456         }
 457
 458         rc = posix_acl_valid(acl);
 459         if (rc) {
 460                 CERROR("validate acl: %d\n", rc);
 461                 posix_acl_release(acl);
 462                 RETURN(rc);
 463         }
 464
 465         md->posix_acl = acl;
 466         RETURN(0);
 467 }
 468 #else
 469 #define mdc_unpack_acl(req, md) 0
 470 #endif
 471
 472 int mdc_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
 473                       struct obd_export *dt_exp, struct obd_export *md_exp,
 474                       struct lustre_md *md)
 475 {
 476         struct req_capsule *pill = &req->rq_pill;
 477         int rc;
 478         ENTRY;
 479
 480         LASSERT(md);
 481         memset(md, 0, sizeof(*md));
 482
 483         md->body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 484         LASSERT(md->body != NULL);
 485
 486         if (md->body->valid & OBD_MD_FLEASIZE) {
 487                 int lmmsize;
 488                 struct lov_mds_md *lmm;
 489
 490                 if (!S_ISREG(md->body->mode)) {
 491                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, should be a "
 492                                "regular file, but is not\n");
 493                         GOTO(out, rc = -EPROTO);
 494                 }
 495
 496                 if (md->body->eadatasize == 0) {
 497                         CDEBUG(D_INFO, "OBD_MD_FLEASIZE set, "
 498                                "but eadatasize 0\n");
 499                         GOTO(out, rc = -EPROTO);
 500                 }
 501                 lmmsize = md->body->eadatasize;
 502                 lmm = req_capsule_server_sized_get(pill, &RMF_MDT_MD, lmmsize);
 503                 if (!lmm)
 504                         GOTO(out, rc = -EPROTO);
 505
 506                 rc = obd_unpackmd(dt_exp, &md->lsm, lmm, lmmsize);
 507                 if (rc < 0)
 508                         GOTO(out, rc);
 509
 510                 if (rc < sizeof(*md->lsm)) {
 511                         CDEBUG(D_INFO, "lsm size too small: "
 512                                "rc < sizeof (*md->lsm) (%d < %d)\n",
 513                                rc, (int)sizeof(*md->lsm));
 514                         GOTO(out, rc = -EPROTO);
 515                 }
 516
 517         } else if (md->body->valid & OBD_MD_FLDIREA) {
 518                 int lmvsize;
 519                 struct lov_mds_md *lmv;
 520
 521                 if(!S_ISDIR(md->body->mode)) {
 522                         CDEBUG(D_INFO, "OBD_MD_FLDIREA set, should be a "
 523                                "directory, but is not\n");
 524                         GOTO(out, rc = -EPROTO);
 525                 }
 526
 527                 if (md->body->eadatasize == 0) {
 528                         CDEBUG(D_INFO, "OBD_MD_FLDIREA is set, "
 529                                "but eadatasize 0\n");
 530                         RETURN(-EPROTO);
 531                 }
 532                 if (md->body->valid & OBD_MD_MEA) {
 533                         lmvsize = md->body->eadatasize;
 534                         lmv = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
 535                                                            lmvsize);
 536                         if (!lmv)
 537                                 GOTO(out, rc = -EPROTO);
 538
 539                         rc = obd_unpackmd(md_exp, (void *)&md->mea, lmv,
 540                                           lmvsize);
 541                         if (rc < 0)
 542                                 GOTO(out, rc);
 543
 544                         if (rc < sizeof(*md->mea)) {
 545                                 CDEBUG(D_INFO, "size too small:  "
 546                                        "rc < sizeof(*md->mea) (%d < %d)\n",
 547                                         rc, (int)sizeof(*md->mea));
 548                                 GOTO(out, rc = -EPROTO);
 549                         }
 550                 }
 551         }
 552         rc = 0;
 553
 554         if (md->body->valid & OBD_MD_FLRMTPERM) {
 555                 /* remote permission */
 556                 LASSERT(client_is_remote(exp));
 557                 md->remote_perm = req_capsule_server_swab_get(pill, &RMF_ACL,
 558                                                 lustre_swab_mdt_remote_perm);
 559                 if (!md->remote_perm)
 560                         GOTO(out, rc = -EPROTO);
 561         }
 562         else if (md->body->valid & OBD_MD_FLACL) {
 563                 /* for ACL, it's possible that FLACL is set but aclsize is zero.
 564                  * only when aclsize != 0 there's an actual segment for ACL
 565                  * in reply buffer.
 566                  */
 567                 if (md->body->aclsize) {
 568                         rc = mdc_unpack_acl(req, md);
 569                         if (rc)
 570                                 GOTO(out, rc);
 571 #ifdef CONFIG_FS_POSIX_ACL
 572                 } else {
 573                         md->posix_acl = NULL;
 574 #endif
 575                 }
 576         }
 577         if (md->body->valid & OBD_MD_FLMDSCAPA) {
 578                 struct obd_capa *oc = NULL;
 579
 580                 rc = mdc_unpack_capa(NULL, req, &RMF_CAPA1, &oc);
 581                 if (rc)
 582                         GOTO(out, rc);
 583                 md->mds_capa = oc;
 584         }
 585
 586         if (md->body->valid & OBD_MD_FLOSSCAPA) {
 587                 struct obd_capa *oc = NULL;
 588
 589                 rc = mdc_unpack_capa(NULL, req, &RMF_CAPA2, &oc);
 590                 if (rc)
 591                         GOTO(out, rc);
 592                 md->oss_capa = oc;
 593         }
 594
 595         EXIT;
 596 out:
 597         if (rc) {
 598                 if (md->oss_capa) {
 599                         capa_put(md->oss_capa);
 600                         md->oss_capa = NULL;
 601                 }
 602                 if (md->mds_capa) {
 603                         capa_put(md->mds_capa);
 604                         md->mds_capa = NULL;
 605                 }
 606 #ifdef CONFIG_FS_POSIX_ACL
 607                 posix_acl_release(md->posix_acl);
 608 #endif
 609                 if (md->lsm)
 610                         obd_free_memmd(dt_exp, &md->lsm);
 611         }
 612         return rc;
 613 }
 614
 615 int mdc_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
 616 {
 617         ENTRY;
 618         RETURN(0);
 619 }
 620
 621 /**
 622  * Handles both OPEN and SETATTR RPCs for OPEN-CLOSE and SETATTR-DONE_WRITING
 623  * RPC chains.
 624  */
 625 void mdc_replay_open(struct ptlrpc_request *req)
 626 {
 627         struct md_open_data *mod = req->rq_cb_data;
 628         struct ptlrpc_request *close_req;
 629         struct obd_client_handle *och;
 630         struct lustre_handle old;
 631         struct mdt_body *body;
 632         ENTRY;
 633
 634         if (mod == NULL) {
 635                 DEBUG_REQ(D_ERROR, req,
 636                           "Can't properly replay without open data.");
 637                 EXIT;
 638                 return;
 639         }
 640
 641         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 642         LASSERT(body != NULL);
 643
 644         och = mod->mod_och;
 645         if (och != NULL) {
 646                 struct lustre_handle *file_fh;
 647
 648                 LASSERT(och->och_magic == OBD_CLIENT_HANDLE_MAGIC);
 649
 650                 file_fh = &och->och_fh;
 651                 CDEBUG(D_HA, "updating handle from "LPX64" to "LPX64"\n",
 652                        file_fh->cookie, body->handle.cookie);
 653                 old = *file_fh;
 654                 *file_fh = body->handle;
 655         }
 656         close_req = mod->mod_close_req;
 657         if (close_req != NULL) {
 658                 __u32 opc = lustre_msg_get_opc(close_req->rq_reqmsg);
 659                 struct mdt_ioepoch *epoch;
 660
 661                 LASSERT(opc == MDS_CLOSE || opc == MDS_DONE_WRITING);
 662                 epoch = req_capsule_client_get(&close_req->rq_pill,
 663                                                &RMF_MDT_EPOCH);
 664                 LASSERT(epoch);
 665
 666                 if (och != NULL)
 667                         LASSERT(!memcmp(&old, &epoch->handle, sizeof(old)));
 668                 DEBUG_REQ(D_HA, close_req, "updating close body with new fh");
 669                 epoch->handle = body->handle;
 670         }
 671         EXIT;
 672 }
 673
 674 void mdc_commit_open(struct ptlrpc_request *req)
 675 {
 676         struct md_open_data *mod = req->rq_cb_data;
 677         if (mod == NULL)
 678                 return;
 679
 680         /**
 681          * No need to touch md_open_data::mod_och, it holds a reference on
 682          * \var mod and will zero references to each other, \var mod will be
 683          * freed after that when md_open_data::mod_och will put the reference.
 684          */
 685
 686         /**
 687          * Do not let open request to disappear as it still may be needed
 688          * for close rpc to happen (it may happen on evict only, otherwise
 689          * ptlrpc_request::rq_replay does not let mdc_commit_open() to be
 690          * called), just mark this rpc as committed to distinguish these 2
 691          * cases, see mdc_close() for details. The open request reference will
 692          * be put along with freeing \var mod.
 693          */
 694         ptlrpc_request_addref(req);
 695         spin_lock(&req->rq_lock);
 696         req->rq_committed = 1;
 697         spin_unlock(&req->rq_lock);
 698         req->rq_cb_data = NULL;
 699         obd_mod_put(mod);
 700 }
 701
 702 int mdc_set_open_replay_data(struct obd_export *exp,
 703                              struct obd_client_handle *och,
 704                              struct ptlrpc_request *open_req)
 705 {
 706         struct md_open_data   *mod;
 707         struct mdt_rec_create *rec;
 708         struct mdt_body       *body;
 709         struct obd_import     *imp = open_req->rq_import;
 710         ENTRY;
 711
 712         if (!open_req->rq_replay)
 713                 RETURN(0);
 714
 715         rec = req_capsule_client_get(&open_req->rq_pill, &RMF_REC_REINT);
 716         body = req_capsule_server_get(&open_req->rq_pill, &RMF_MDT_BODY);
 717         LASSERT(rec != NULL);
 718         /* Incoming message in my byte order (it's been swabbed). */
 719         /* Outgoing messages always in my byte order. */
 720         LASSERT(body != NULL);
 721
 722         /* Only if the import is replayable, we set replay_open data */
 723         if (och && imp->imp_replayable) {
 724                 mod = obd_mod_alloc();
 725                 if (mod == NULL) {
 726                         DEBUG_REQ(D_ERROR, open_req,
 727                                   "Can't allocate md_open_data");
 728                         RETURN(0);
 729                 }
 730
 731                 /**
 732                  * Take a reference on \var mod, to be freed on mdc_close().
 733                  * It protects \var mod from being freed on eviction (commit
 734                  * callback is called despite rq_replay flag).
 735                  * Another reference for \var och.
 736                  */
 737                 obd_mod_get(mod);
 738                 obd_mod_get(mod);
 739
 740                 spin_lock(&open_req->rq_lock);
 741                 och->och_mod = mod;
 742                 mod->mod_och = och;
 743                 mod->mod_open_req = open_req;
 744                 open_req->rq_cb_data = mod;
 745                 open_req->rq_commit_cb = mdc_commit_open;
 746                 spin_unlock(&open_req->rq_lock);
 747         }
 748
 749         rec->cr_fid2 = body->fid1;
 750         rec->cr_ioepoch = body->ioepoch;
 751         rec->cr_old_handle.cookie = body->handle.cookie;
 752         open_req->rq_replay_cb = mdc_replay_open;
 753         if (!fid_is_sane(&body->fid1)) {
 754                 DEBUG_REQ(D_ERROR, open_req, "Saving replay request with "
 755                           "insane fid");
 756                 LBUG();
 757         }
 758
 759         DEBUG_REQ(D_RPCTRACE, open_req, "Set up open replay data");
 760         RETURN(0);
 761 }
 762
 763 int mdc_clear_open_replay_data(struct obd_export *exp,
 764                                struct obd_client_handle *och)
 765 {
 766         struct md_open_data *mod = och->och_mod;
 767         ENTRY;
 768
 769         /**
 770          * It is possible to not have \var mod in a case of eviction between
 771          * lookup and ll_file_open().
 772          **/
 773         if (mod == NULL)
 774                 RETURN(0);
 775
 776         LASSERT(mod != LP_POISON);
 777
 778         mod->mod_och = NULL;
 779         och->och_mod = NULL;
 780         obd_mod_put(mod);
 781
 782         RETURN(0);
 783 }
 784
 785 /* Prepares the request for the replay by the given reply */
 786 static void mdc_close_handle_reply(struct ptlrpc_request *req,
 787                                    struct md_op_data *op_data, int rc) {
 788         struct mdt_body  *repbody;
 789         struct mdt_ioepoch *epoch;
 790
 791         if (req && rc == -EAGAIN) {
 792                 repbody = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 793                 epoch = req_capsule_client_get(&req->rq_pill, &RMF_MDT_EPOCH);
 794
 795                 epoch->flags |= MF_SOM_AU;
 796                 if (repbody->valid & OBD_MD_FLGETATTRLOCK)
 797                         op_data->op_flags |= MF_GETATTR_LOCK;
 798         }
 799 }
 800
 801 int mdc_close(struct obd_export *exp, struct md_op_data *op_data,
 802               struct md_open_data *mod, struct ptlrpc_request **request)
 803 {
 804         struct obd_device     *obd = class_exp2obd(exp);
 805         struct ptlrpc_request *req;
 806         int                    rc;
 807         ENTRY;
 808
 809         *request = NULL;
 810         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_CLOSE);
 811         if (req == NULL)
 812                 RETURN(-ENOMEM);
 813
 814         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 815
 816         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_CLOSE);
 817         if (rc) {
 818                 ptlrpc_request_free(req);
 819                 RETURN(rc);
 820         }
 821
 822         /* To avoid a livelock (bug 7034), we need to send CLOSE RPCs to a
 823          * portal whose threads are not taking any DLM locks and are therefore
 824          * always progressing */
 825         req->rq_request_portal = MDS_READPAGE_PORTAL;
 826         ptlrpc_at_set_req_timeout(req);
 827
 828         /* Ensure that this close's handle is fixed up during replay. */
 829         if (likely(mod != NULL)) {
 830                 LASSERTF(mod->mod_open_req != NULL &&
 831                          mod->mod_open_req->rq_type != LI_POISON,
 832                          "POISONED open %p!\n", mod->mod_open_req);
 833
 834                 mod->mod_close_req = req;
 835
 836                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched open");
 837                 /* We no longer want to preserve this open for replay even
 838                  * though the open was committed. b=3632, b=3633 */
 839                 spin_lock(&mod->mod_open_req->rq_lock);
 840                 mod->mod_open_req->rq_replay = 0;
 841                 spin_unlock(&mod->mod_open_req->rq_lock);
 842         } else {
 843                  CDEBUG(D_HA, "couldn't find open req; expecting close error\n");
 844         }
 845
 846         mdc_close_pack(req, op_data);
 847
 848         req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
 849                              obd->u.cli.cl_max_mds_easize);
 850         req_capsule_set_size(&req->rq_pill, &RMF_LOGCOOKIES, RCL_SERVER,
 851                              obd->u.cli.cl_max_mds_cookiesize);
 852
 853         ptlrpc_request_set_replen(req);
 854
 855         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 856         rc = ptlrpc_queue_wait(req);
 857         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 858
 859         if (req->rq_repmsg == NULL) {
 860                 CDEBUG(D_RPCTRACE, "request failed to send: %p, %d\n", req,
 861                        req->rq_status);
 862                 if (rc == 0)
 863                         rc = req->rq_status ?: -EIO;
 864         } else if (rc == 0 || rc == -EAGAIN) {
 865                 struct mdt_body *body;
 866
 867                 rc = lustre_msg_get_status(req->rq_repmsg);
 868                 if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
 869                         DEBUG_REQ(D_ERROR, req, "type == PTL_RPC_MSG_ERR, err "
 870                                   "= %d", rc);
 871                         if (rc > 0)
 872                                 rc = -rc;
 873                 }
 874                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
 875                 if (body == NULL)
 876                         rc = -EPROTO;
 877         } else if (rc == -ESTALE) {
 878                 /**
 879                  * it can be allowed error after 3633 if open was committed and
 880                  * server failed before close was sent. Let's check if mod
 881                  * exists and return no error in that case
 882                  */
 883                 if (mod) {
 884                         DEBUG_REQ(D_HA, req, "Reset ESTALE = %d", rc);
 885                         LASSERT(mod->mod_open_req != NULL);
 886                         if (mod->mod_open_req->rq_committed)
 887                                 rc = 0;
 888                 }
 889         }
 890
 891         if (mod) {
 892                 if (rc != 0)
 893                         mod->mod_close_req = NULL;
 894                 /* Since now, mod is accessed through open_req only,
 895                  * thus close req does not keep a reference on mod anymore. */
 896                 obd_mod_put(mod);
 897         }
 898         *request = req;
 899         mdc_close_handle_reply(req, op_data, rc);
 900         RETURN(rc);
 901 }
 902
 903 int mdc_done_writing(struct obd_export *exp, struct md_op_data *op_data,
 904                      struct md_open_data *mod)
 905 {
 906         struct obd_device     *obd = class_exp2obd(exp);
 907         struct ptlrpc_request *req;
 908         int                    rc;
 909         ENTRY;
 910
 911         req = ptlrpc_request_alloc(class_exp2cliimp(exp),
 912                                    &RQF_MDS_DONE_WRITING);
 913         if (req == NULL)
 914                 RETURN(-ENOMEM);
 915
 916         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
 917         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_DONE_WRITING);
 918         if (rc) {
 919                 ptlrpc_request_free(req);
 920                 RETURN(rc);
 921         }
 922
 923         if (mod != NULL) {
 924                 LASSERTF(mod->mod_open_req != NULL &&
 925                          mod->mod_open_req->rq_type != LI_POISON,
 926                          "POISONED setattr %p!\n", mod->mod_open_req);
 927
 928                 mod->mod_close_req = req;
 929                 DEBUG_REQ(D_HA, mod->mod_open_req, "matched setattr");
 930                 /* We no longer want to preserve this setattr for replay even
 931                  * though the open was committed. b=3632, b=3633 */
 932                 spin_lock(&mod->mod_open_req->rq_lock);
 933                 mod->mod_open_req->rq_replay = 0;
 934                 spin_unlock(&mod->mod_open_req->rq_lock);
 935         }
 936
 937         mdc_close_pack(req, op_data);
 938         ptlrpc_request_set_replen(req);
 939
 940         mdc_get_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 941         rc = ptlrpc_queue_wait(req);
 942         mdc_put_rpc_lock(obd->u.cli.cl_close_lock, NULL);
 943
 944         if (rc == -ESTALE) {
 945                 /**
 946                  * it can be allowed error after 3633 if open or setattr were
 947                  * committed and server failed before close was sent.
 948                  * Let's check if mod exists and return no error in that case
 949                  */
 950                 if (mod) {
 951                         LASSERT(mod->mod_open_req != NULL);
 952                         if (mod->mod_open_req->rq_committed)
 953                                 rc = 0;
 954                 }
 955         }
 956
 957         if (mod) {
 958                 if (rc != 0)
 959                         mod->mod_close_req = NULL;
 960                 /* Since now, mod is accessed through setattr req only,
 961                  * thus DW req does not keep a reference on mod anymore. */
 962                 obd_mod_put(mod);
 963         }
 964
 965         mdc_close_handle_reply(req, op_data, rc);
 966         ptlrpc_req_finished(req);
 967         RETURN(rc);
 968 }
 969
 970 #ifdef HAVE_SPLIT_SUPPORT
 971 int mdc_sendpage(struct obd_export *exp, const struct lu_fid *fid,
 972                  const struct page *page, int offset)
 973 {
 974         struct ptlrpc_request   *req;
 975         struct ptlrpc_bulk_desc *desc;
 976         int                      rc;
 977         ENTRY;
 978
 979         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_WRITEPAGE);
 980         if (req == NULL)
 981                 RETURN(-ENOMEM);
 982
 983         /* FIXME: capa doesn't support split yet */
 984         mdc_set_capa_size(req, &RMF_CAPA1, NULL);
 985
 986         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_WRITEPAGE);
 987         if (rc) {
 988                 ptlrpc_request_free(req);
 989                 RETURN(rc);
 990         }
 991
 992         req->rq_request_portal = MDS_READPAGE_PORTAL;
 993         ptlrpc_at_set_req_timeout(req);
 994
 995         desc = ptlrpc_prep_bulk_imp(req, 1, BULK_GET_SOURCE, MDS_BULK_PORTAL);
 996         if (desc == NULL)
 997                 GOTO(out, rc = -ENOMEM);
 998
 999         /* NB req now owns desc and will free it when it gets freed. */
1000         ptlrpc_prep_bulk_page(desc, (struct page *)page, 0, offset);
1001         mdc_readdir_pack(req, 0, offset, fid, NULL);
1002
1003         ptlrpc_request_set_replen(req);
1004         rc = ptlrpc_queue_wait(req);
1005         if (rc)
1006                 GOTO(out, rc);
1007
1008         rc = sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk);
1009 out:
1010         ptlrpc_req_finished(req);
1011         return rc;
1012 }
1013 EXPORT_SYMBOL(mdc_sendpage);
1014 #endif
1015
1016 int mdc_readpage(struct obd_export *exp, struct md_op_data *op_data,
1017                  struct page **pages, struct ptlrpc_request **request)
1018 {
1019         struct ptlrpc_request   *req;
1020         struct ptlrpc_bulk_desc *desc;
1021         int                      i;
1022         cfs_waitq_t              waitq;
1023         int                      resends = 0;
1024         struct l_wait_info       lwi;
1025         int                      rc;
1026         ENTRY;
1027
1028         *request = NULL;
1029         cfs_waitq_init(&waitq);
1030
1031 restart_bulk:
1032         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_READPAGE);
1033         if (req == NULL)
1034                 RETURN(-ENOMEM);
1035
1036         mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
1037
1038         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_READPAGE);
1039         if (rc) {
1040                 ptlrpc_request_free(req);
1041                 RETURN(rc);
1042         }
1043
1044         req->rq_request_portal = MDS_READPAGE_PORTAL;
1045         ptlrpc_at_set_req_timeout(req);
1046
1047         desc = ptlrpc_prep_bulk_imp(req, op_data->op_npages, BULK_PUT_SINK,
1048                                     MDS_BULK_PORTAL);
1049         if (desc == NULL) {
1050                 ptlrpc_request_free(req);
1051                 RETURN(-ENOMEM);
1052         }
1053
1054         /* NB req now owns desc and will free it when it gets freed */
1055         for (i = 0; i < op_data->op_npages; i++)
1056                 ptlrpc_prep_bulk_page_pin(desc, pages[i], 0, CFS_PAGE_SIZE);
1057
1058         mdc_readdir_pack(req, op_data->op_offset,
1059                          CFS_PAGE_SIZE * op_data->op_npages,
1060                          &op_data->op_fid1, op_data->op_capa1);
1061
1062         ptlrpc_request_set_replen(req);
1063         rc = ptlrpc_queue_wait(req);
1064         if (rc) {
1065                 ptlrpc_req_finished(req);
1066                 if (rc != -ETIMEDOUT)
1067                         RETURN(rc);
1068
1069                 resends++;
1070                 if (!client_should_resend(resends, &exp->exp_obd->u.cli)) {
1071                         CERROR("too many resend retries, returning error\n");
1072                         RETURN(-EIO);
1073                 }
1074                 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL, NULL);
1075                 l_wait_event(waitq, 0, &lwi);
1076
1077                 goto restart_bulk;
1078         }
1079
1080         rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
1081                                           req->rq_bulk->bd_nob_transferred);
1082         if (rc < 0) {
1083                 ptlrpc_req_finished(req);
1084                 RETURN(rc);
1085         }
1086
1087         if (req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK) {
1088                 CERROR("Unexpected # bytes transferred: %d (%ld expected)\n",
1089                         req->rq_bulk->bd_nob_transferred,
1090                         CFS_PAGE_SIZE * op_data->op_npages);
1091                 ptlrpc_req_finished(req);
1092                 RETURN(-EPROTO);
1093         }
1094
1095         *request = req;
1096         RETURN(0);
1097 }
1098
1099 static int mdc_statfs(const struct lu_env *env,
1100                       struct obd_export *exp, struct obd_statfs *osfs,
1101                       __u64 max_age, __u32 flags)
1102 {
1103         struct obd_device     *obd = class_exp2obd(exp);
1104         struct ptlrpc_request *req;
1105         struct obd_statfs     *msfs;
1106         struct obd_import     *imp = NULL;
1107         int                    rc;
1108         ENTRY;
1109
1110         /*
1111          * Since the request might also come from lprocfs, so we need
1112          * sync this with client_disconnect_export Bug15684
1113          */
1114         down_read(&obd->u.cli.cl_sem);
1115         if (obd->u.cli.cl_import)
1116                 imp = class_import_get(obd->u.cli.cl_import);
1117         up_read(&obd->u.cli.cl_sem);
1118         if (!imp)
1119                 RETURN(-ENODEV);
1120
1121         req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_STATFS,
1122                                         LUSTRE_MDS_VERSION, MDS_STATFS);
1123         if (req == NULL)
1124                 GOTO(output, rc = -ENOMEM);
1125
1126         ptlrpc_request_set_replen(req);
1127
1128         if (flags & OBD_STATFS_NODELAY) {
1129                 /* procfs requests not want stay in wait for avoid deadlock */
1130                 req->rq_no_resend = 1;
1131                 req->rq_no_delay = 1;
1132         }
1133
1134         rc = ptlrpc_queue_wait(req);
1135         if (rc) {
1136                 /* check connection error first */
1137                 if (imp->imp_connect_error)
1138                         rc = imp->imp_connect_error;
1139                 GOTO(out, rc);
1140         }
1141
1142         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1143         if (msfs == NULL)
1144                 GOTO(out, rc = -EPROTO);
1145
1146         *osfs = *msfs;
1147         EXIT;
1148 out:
1149         ptlrpc_req_finished(req);
1150 output:
1151         class_import_put(imp);
1152         return rc;
1153 }
1154
1155 static int mdc_ioc_fid2path(struct obd_export *exp, struct getinfo_fid2path *gf)
1156 {
1157         __u32 keylen, vallen;
1158         void *key;
1159         int rc;
1160
1161         if (gf->gf_pathlen > PATH_MAX)
1162                 RETURN(-ENAMETOOLONG);
1163         if (gf->gf_pathlen < 2)
1164                 RETURN(-EOVERFLOW);
1165
1166         /* Key is KEY_FID2PATH + getinfo_fid2path description */
1167         keylen = cfs_size_round(sizeof(KEY_FID2PATH)) + sizeof(*gf);
1168         OBD_ALLOC(key, keylen);
1169         if (key == NULL)
1170                 RETURN(-ENOMEM);
1171         memcpy(key, KEY_FID2PATH, sizeof(KEY_FID2PATH));
1172         memcpy(key + cfs_size_round(sizeof(KEY_FID2PATH)), gf, sizeof(*gf));
1173
1174         CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%d\n",
1175                PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno);
1176
1177         if (!fid_is_sane(&gf->gf_fid))
1178                 GOTO(out, rc = -EINVAL);
1179
1180         /* Val is struct getinfo_fid2path result plus path */
1181         vallen = sizeof(*gf) + gf->gf_pathlen;
1182
1183         rc = obd_get_info(NULL, exp, keylen, key, &vallen, gf, NULL);
1184         if (rc)
1185                 GOTO(out, rc);
1186
1187         if (vallen <= sizeof(*gf))
1188                 GOTO(out, rc = -EPROTO);
1189         else if (vallen > sizeof(*gf) + gf->gf_pathlen)
1190                 GOTO(out, rc = -EOVERFLOW);
1191
1192         CDEBUG(D_IOCTL, "path get "DFID" from "LPU64" #%d\n%s\n",
1193                PFID(&gf->gf_fid), gf->gf_recno, gf->gf_linkno, gf->gf_path);
1194
1195 out:
1196         OBD_FREE(key, keylen);
1197         return rc;
1198 }
1199
1200 static struct kuc_hdr *changelog_kuc_hdr(char *buf, int len, int flags)
1201 {
1202         struct kuc_hdr *lh = (struct kuc_hdr *)buf;
1203
1204         LASSERT(len <= CR_MAXSIZE);
1205
1206         lh->kuc_magic = KUC_MAGIC;
1207         lh->kuc_transport = KUC_TRANSPORT_CHANGELOG;
1208         lh->kuc_flags = flags;
1209         lh->kuc_msgtype = CL_RECORD;
1210         lh->kuc_msglen = len;
1211         return lh;
1212 }
1213
1214 #define D_CHANGELOG 0
1215
1216 struct changelog_show {
1217         __u64       cs_startrec;
1218         __u32       cs_flags;
1219         cfs_file_t *cs_fp;
1220         char       *cs_buf;
1221         struct obd_device *cs_obd;
1222 };
1223
1224 static int changelog_show_cb(const struct lu_env *env, struct llog_handle *llh,
1225                              struct llog_rec_hdr *hdr, void *data)
1226 {
1227         struct changelog_show *cs = data;
1228         struct llog_changelog_rec *rec = (struct llog_changelog_rec *)hdr;
1229         struct kuc_hdr *lh;
1230         int len, rc;
1231         ENTRY;
1232
1233         if ((rec->cr_hdr.lrh_type != CHANGELOG_REC) ||
1234             (rec->cr.cr_type >= CL_LAST)) {
1235                 CERROR("Not a changelog rec %d/%d\n", rec->cr_hdr.lrh_type,
1236                        rec->cr.cr_type);
1237                 RETURN(-EINVAL);
1238         }
1239
1240         if (rec->cr.cr_index < cs->cs_startrec) {
1241                 /* Skip entries earlier than what we are interested in */
1242                 CDEBUG(D_CHANGELOG, "rec="LPU64" start="LPU64"\n",
1243                        rec->cr.cr_index, cs->cs_startrec);
1244                 RETURN(0);
1245         }
1246
1247         CDEBUG(D_CHANGELOG, LPU64" %02d%-5s "LPU64" 0x%x t="DFID" p="DFID
1248                 " %.*s\n", rec->cr.cr_index, rec->cr.cr_type,
1249                 changelog_type2str(rec->cr.cr_type), rec->cr.cr_time,
1250                 rec->cr.cr_flags & CLF_FLAGMASK,
1251                 PFID(&rec->cr.cr_tfid), PFID(&rec->cr.cr_pfid),
1252                 rec->cr.cr_namelen, changelog_rec_name(&rec->cr));
1253
1254         len = sizeof(*lh) + changelog_rec_size(&rec->cr) + rec->cr.cr_namelen;
1255
1256         /* Set up the message */
1257         lh = changelog_kuc_hdr(cs->cs_buf, len, cs->cs_flags);
1258         memcpy(lh + 1, &rec->cr, len - sizeof(*lh));
1259
1260         rc = libcfs_kkuc_msg_put(cs->cs_fp, lh);
1261         CDEBUG(D_CHANGELOG, "kucmsg fp %p len %d rc %d\n", cs->cs_fp, len,rc);
1262
1263         RETURN(rc);
1264 }
1265
1266 static int mdc_changelog_send_thread(void *csdata)
1267 {
1268         struct changelog_show *cs = csdata;
1269         struct llog_ctxt *ctxt = NULL;
1270         struct llog_handle *llh = NULL;
1271         struct kuc_hdr *kuch;
1272         int rc;
1273
1274         CDEBUG(D_CHANGELOG, "changelog to fp=%p start "LPU64"\n",
1275                cs->cs_fp, cs->cs_startrec);
1276
1277         /*
1278          * It's important to daemonize here to close unused FDs.
1279          * The write fd from pipe is already opened by the caller,
1280          * so it's fine to clear all files here
1281          */
1282         cfs_daemonize("mdc_clg_send_thread");
1283
1284         OBD_ALLOC(cs->cs_buf, CR_MAXSIZE);
1285         if (cs->cs_buf == NULL)
1286                 GOTO(out, rc = -ENOMEM);
1287
1288         /* Set up the remote catalog handle */
1289         ctxt = llog_get_context(cs->cs_obd, LLOG_CHANGELOG_REPL_CTXT);
1290         if (ctxt == NULL)
1291                 GOTO(out, rc = -ENOENT);
1292         rc = llog_open(NULL, ctxt, &llh, NULL, CHANGELOG_CATALOG,
1293                        LLOG_OPEN_EXISTS);
1294         if (rc) {
1295                 CERROR("%s: fail to open changelog catalog: rc = %d\n",
1296                        cs->cs_obd->obd_name, rc);
1297                 GOTO(out, rc);
1298         }
1299         rc = llog_init_handle(NULL, llh, LLOG_F_IS_CAT, NULL);
1300         if (rc) {
1301                 CERROR("llog_init_handle failed %d\n", rc);
1302                 GOTO(out, rc);
1303         }
1304
1305         rc = llog_cat_process(NULL, llh, changelog_show_cb, cs, 0, 0);
1306
1307         /* Send EOF no matter what our result */
1308         if ((kuch = changelog_kuc_hdr(cs->cs_buf, sizeof(*kuch),
1309                                       cs->cs_flags))) {
1310                 kuch->kuc_msgtype = CL_EOF;
1311                 libcfs_kkuc_msg_put(cs->cs_fp, kuch);
1312         }
1313
1314 out:
1315         cfs_put_file(cs->cs_fp);
1316         if (llh)
1317                 llog_cat_close(NULL, llh);
1318         if (ctxt)
1319                 llog_ctxt_put(ctxt);
1320         if (cs->cs_buf)
1321                 OBD_FREE(cs->cs_buf, CR_MAXSIZE);
1322         OBD_FREE_PTR(cs);
1323         /* detach from parent process so we get cleaned up */
1324         cfs_daemonize("cl_send");
1325         return rc;
1326 }
1327
1328 static int mdc_ioc_changelog_send(struct obd_device *obd,
1329                                   struct ioc_changelog *icc)
1330 {
1331         struct changelog_show *cs;
1332         int rc;
1333
1334         /* Freed in mdc_changelog_send_thread */
1335         OBD_ALLOC_PTR(cs);
1336         if (!cs)
1337                 return -ENOMEM;
1338
1339         cs->cs_obd = obd;
1340         cs->cs_startrec = icc->icc_recno;
1341         /* matching cfs_put_file in mdc_changelog_send_thread */
1342         cs->cs_fp = cfs_get_fd(icc->icc_id);
1343         cs->cs_flags = icc->icc_flags;
1344
1345         /* New thread because we should return to user app before
1346            writing into our pipe */
1347         rc = cfs_create_thread(mdc_changelog_send_thread, cs, CFS_DAEMON_FLAGS);
1348         if (rc >= 0) {
1349                 CDEBUG(D_CHANGELOG, "start changelog thread: %d\n", rc);
1350                 return 0;
1351         }
1352
1353         CERROR("Failed to start changelog thread: %d\n", rc);
1354         OBD_FREE_PTR(cs);
1355         return rc;
1356 }
1357
1358 static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
1359                                 struct lustre_kernelcomm *lk);
1360
1361 static int mdc_quotacheck(struct obd_device *unused, struct obd_export *exp,
1362                           struct obd_quotactl *oqctl)
1363 {
1364         struct client_obd       *cli = &exp->exp_obd->u.cli;
1365         struct ptlrpc_request   *req;
1366         struct obd_quotactl     *body;
1367         int                      rc;
1368         ENTRY;
1369
1370         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
1371                                         &RQF_MDS_QUOTACHECK, LUSTRE_MDS_VERSION,
1372                                         MDS_QUOTACHECK);
1373         if (req == NULL)
1374                 RETURN(-ENOMEM);
1375
1376         body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1377         *body = *oqctl;
1378
1379         ptlrpc_request_set_replen(req);
1380
1381         /* the next poll will find -ENODATA, that means quotacheck is
1382          * going on */
1383         cli->cl_qchk_stat = -ENODATA;
1384         rc = ptlrpc_queue_wait(req);
1385         if (rc)
1386                 cli->cl_qchk_stat = rc;
1387         ptlrpc_req_finished(req);
1388         RETURN(rc);
1389 }
1390
1391 static int mdc_quota_poll_check(struct obd_export *exp,
1392                                 struct if_quotacheck *qchk)
1393 {
1394         struct client_obd *cli = &exp->exp_obd->u.cli;
1395         int rc;
1396         ENTRY;
1397
1398         qchk->obd_uuid = cli->cl_target_uuid;
1399         memcpy(qchk->obd_type, LUSTRE_MDS_NAME, strlen(LUSTRE_MDS_NAME));
1400
1401         rc = cli->cl_qchk_stat;
1402         /* the client is not the previous one */
1403         if (rc == CL_NOT_QUOTACHECKED)
1404                 rc = -EINTR;
1405         RETURN(rc);
1406 }
1407
1408 static int mdc_quotactl(struct obd_device *unused, struct obd_export *exp,
1409                         struct obd_quotactl *oqctl)
1410 {
1411         struct ptlrpc_request   *req;
1412         struct obd_quotactl     *oqc;
1413         int                      rc;
1414         ENTRY;
1415
1416         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
1417                                         &RQF_MDS_QUOTACTL, LUSTRE_MDS_VERSION,
1418                                         MDS_QUOTACTL);
1419         if (req == NULL)
1420                 RETURN(-ENOMEM);
1421
1422         oqc = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
1423         *oqc = *oqctl;
1424
1425         ptlrpc_request_set_replen(req);
1426         ptlrpc_at_set_req_timeout(req);
1427         req->rq_no_resend = 1;
1428
1429         rc = ptlrpc_queue_wait(req);
1430         if (rc)
1431                 CERROR("ptlrpc_queue_wait failed, rc: %d\n", rc);
1432
1433         if (req->rq_repmsg &&
1434             (oqc = req_capsule_server_get(&req->rq_pill, &RMF_OBD_QUOTACTL))) {
1435                 *oqctl = *oqc;
1436         } else if (!rc) {
1437                 CERROR ("Can't unpack obd_quotactl\n");
1438                 rc = -EPROTO;
1439         }
1440         ptlrpc_req_finished(req);
1441
1442         RETURN(rc);
1443 }
1444
1445 static int mdc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1446                          void *karg, void *uarg)
1447 {
1448         struct obd_device *obd = exp->exp_obd;
1449         struct obd_ioctl_data *data = karg;
1450         struct obd_import *imp = obd->u.cli.cl_import;
1451         struct llog_ctxt *ctxt;
1452         int rc;
1453         ENTRY;
1454
1455         if (!cfs_try_module_get(THIS_MODULE)) {
1456                 CERROR("Can't get module. Is it alive?");
1457                 return -EINVAL;
1458         }
1459         switch (cmd) {
1460         case LL_IOC_HSM_CT_START:
1461                 rc = mdc_ioc_hsm_ct_start(exp, karg);
1462                 GOTO(out, rc);
1463         case OBD_IOC_CHANGELOG_SEND:
1464                 rc = mdc_ioc_changelog_send(obd, karg);
1465                 GOTO(out, rc);
1466         case OBD_IOC_CHANGELOG_CLEAR: {
1467                 struct ioc_changelog *icc = karg;
1468                 struct changelog_setinfo cs =
1469                         {.cs_recno = icc->icc_recno, .cs_id = icc->icc_id};
1470                 rc = obd_set_info_async(NULL, exp, strlen(KEY_CHANGELOG_CLEAR),
1471                                         KEY_CHANGELOG_CLEAR, sizeof(cs), &cs,
1472                                         NULL);
1473                 GOTO(out, rc);
1474         }
1475         case OBD_IOC_FID2PATH: {
1476                 rc = mdc_ioc_fid2path(exp, karg);
1477                 GOTO(out, rc);
1478         }
1479         case OBD_IOC_CLIENT_RECOVER:
1480                 rc = ptlrpc_recover_import(imp, data->ioc_inlbuf1, 0);
1481                 if (rc < 0)
1482                         GOTO(out, rc);
1483                 GOTO(out, rc = 0);
1484         case IOC_OSC_SET_ACTIVE:
1485                 rc = ptlrpc_set_import_active(imp, data->ioc_offset);
1486                 GOTO(out, rc);
1487         case OBD_IOC_PARSE: {
1488                 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
1489                 rc = class_config_parse_llog(NULL, ctxt, data->ioc_inlbuf1,
1490                                              NULL);
1491                 llog_ctxt_put(ctxt);
1492                 GOTO(out, rc);
1493         }
1494 #ifdef __KERNEL__
1495         case OBD_IOC_LLOG_INFO:
1496         case OBD_IOC_LLOG_PRINT: {
1497                 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
1498                 rc = llog_ioctl(NULL, ctxt, cmd, data);
1499                 llog_ctxt_put(ctxt);
1500                 GOTO(out, rc);
1501         }
1502 #endif
1503         case OBD_IOC_POLL_QUOTACHECK:
1504                 rc = mdc_quota_poll_check(exp, (struct if_quotacheck *)karg);
1505                 GOTO(out, rc);
1506         case OBD_IOC_PING_TARGET:
1507                 rc = ptlrpc_obd_ping(obd);
1508                 GOTO(out, rc);
1509         /*
1510          * Normally IOC_OBD_STATFS, OBD_IOC_QUOTACTL iocontrol are handled by
1511          * LMV instead of MDC. But when the cluster is upgraded from 1.8,
1512          * there'd be no LMV layer thus we might be called here. Eventually
1513          * this code should be removed.
1514          * bz20731, LU-592.
1515          */
1516         case IOC_OBD_STATFS: {
1517                 struct obd_statfs stat_buf = {0};
1518
1519                 if (*((__u32 *) data->ioc_inlbuf2) != 0)
1520                         GOTO(out, rc = -ENODEV);
1521
1522                 /* copy UUID */
1523                 if (cfs_copy_to_user(data->ioc_pbuf2, obd2cli_tgt(obd),
1524                                      min((int) data->ioc_plen2,
1525                                          (int) sizeof(struct obd_uuid))))
1526                         GOTO(out, rc = -EFAULT);
1527
1528                 rc = mdc_statfs(NULL, obd->obd_self_export, &stat_buf,
1529                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1530                                 0);
1531                 if (rc != 0)
1532                         GOTO(out, rc);
1533
1534                 if (cfs_copy_to_user(data->ioc_pbuf1, &stat_buf,
1535                                      min((int) data->ioc_plen1,
1536                                          (int) sizeof(stat_buf))))
1537                         GOTO(out, rc = -EFAULT);
1538
1539                 GOTO(out, rc = 0);
1540         }
1541         case OBD_IOC_QUOTACTL: {
1542                 struct if_quotactl *qctl = karg;
1543                 struct obd_quotactl *oqctl;
1544
1545                 OBD_ALLOC_PTR(oqctl);
1546                 if (!oqctl)
1547                         RETURN(-ENOMEM);
1548
1549                 QCTL_COPY(oqctl, qctl);
1550                 rc = obd_quotactl(exp, oqctl);
1551                 if (rc == 0) {
1552                         QCTL_COPY(qctl, oqctl);
1553                         qctl->qc_valid = QC_MDTIDX;
1554                         qctl->obd_uuid = obd->u.cli.cl_target_uuid;
1555                 }
1556                 OBD_FREE_PTR(oqctl);
1557                 break;
1558         }
1559         case LL_IOC_GET_CONNECT_FLAGS: {
1560                 if (cfs_copy_to_user(uarg, &exp->exp_connect_flags,
1561                                      sizeof(__u64)))
1562                         GOTO(out, rc = -EFAULT);
1563                 else
1564                         GOTO(out, rc = 0);
1565         }
1566         default:
1567                 CERROR("mdc_ioctl(): unrecognised ioctl %#x\n", cmd);
1568                 GOTO(out, rc = -ENOTTY);
1569         }
1570 out:
1571         cfs_module_put(THIS_MODULE);
1572
1573         return rc;
1574 }
1575
1576 int mdc_get_info_rpc(struct obd_export *exp,
1577                      obd_count keylen, void *key,
1578                      int vallen, void *val)
1579 {
1580         struct obd_import      *imp = class_exp2cliimp(exp);
1581         struct ptlrpc_request  *req;
1582         char                   *tmp;
1583         int                     rc = -EINVAL;
1584         ENTRY;
1585
1586         req = ptlrpc_request_alloc(imp, &RQF_MDS_GET_INFO);
1587         if (req == NULL)
1588                 RETURN(-ENOMEM);
1589
1590         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY,
1591                              RCL_CLIENT, keylen);
1592         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VALLEN,
1593                              RCL_CLIENT, sizeof(__u32));
1594
1595         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GET_INFO);
1596         if (rc) {
1597                 ptlrpc_request_free(req);
1598                 RETURN(rc);
1599         }
1600
1601         tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_KEY);
1602         memcpy(tmp, key, keylen);
1603         tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_VALLEN);
1604         memcpy(tmp, &vallen, sizeof(__u32));
1605
1606         req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_VAL,
1607                              RCL_SERVER, vallen);
1608         ptlrpc_request_set_replen(req);
1609
1610         rc = ptlrpc_queue_wait(req);
1611         if (rc == 0) {
1612                 tmp = req_capsule_server_get(&req->rq_pill, &RMF_GETINFO_VAL);
1613                 memcpy(val, tmp, vallen);
1614                 if (ptlrpc_rep_need_swab(req)) {
1615                         if (KEY_IS(KEY_FID2PATH)) {
1616                                 lustre_swab_fid2path(val);
1617                         }
1618                 }
1619         }
1620         ptlrpc_req_finished(req);
1621
1622         RETURN(rc);
1623 }
1624
1625 static void lustre_swab_hai(struct hsm_action_item *h)
1626 {
1627         __swab32s(&h->hai_len);
1628         __swab32s(&h->hai_action);
1629         lustre_swab_lu_fid(&h->hai_fid);
1630         __swab64s(&h->hai_cookie);
1631         __swab64s(&h->hai_extent.offset);
1632         __swab64s(&h->hai_extent.length);
1633         __swab64s(&h->hai_gid);
1634 }
1635
1636 static void lustre_swab_hal(struct hsm_action_list *h)
1637 {
1638         struct hsm_action_item *hai;
1639         int i;
1640
1641         __swab32s(&h->hal_version);
1642         __swab32s(&h->hal_count);
1643         __swab32s(&h->hal_archive_num);
1644         hai = hai_zero(h);
1645         for (i = 0; i < h->hal_count; i++) {
1646                 lustre_swab_hai(hai);
1647                 hai = hai_next(hai);
1648         }
1649 }
1650
1651 static void lustre_swab_kuch(struct kuc_hdr *l)
1652 {
1653         __swab16s(&l->kuc_magic);
1654         /* __u8 l->kuc_transport */
1655         __swab16s(&l->kuc_msgtype);
1656         __swab16s(&l->kuc_msglen);
1657 }
1658
1659 static int mdc_ioc_hsm_ct_start(struct obd_export *exp,
1660                                 struct lustre_kernelcomm *lk)
1661 {
1662         int rc = 0;
1663
1664         if (lk->lk_group != KUC_GRP_HSM) {
1665                 CERROR("Bad copytool group %d\n", lk->lk_group);
1666                 return -EINVAL;
1667         }
1668
1669         CDEBUG(D_HSM, "CT start r%d w%d u%d g%d f%#x\n", lk->lk_rfd, lk->lk_wfd,
1670                lk->lk_uid, lk->lk_group, lk->lk_flags);
1671
1672         if (lk->lk_flags & LK_FLG_STOP)
1673                 rc = libcfs_kkuc_group_rem(lk->lk_uid,lk->lk_group);
1674         else {
1675                 cfs_file_t *fp = cfs_get_fd(lk->lk_wfd);
1676                 rc = libcfs_kkuc_group_add(fp, lk->lk_uid,lk->lk_group,
1677                                            lk->lk_data);
1678                 if (rc && fp)
1679                         cfs_put_file(fp);
1680         }
1681
1682         /* lk_data is archive number mask */
1683         /* TODO: register archive num with mdt so coordinator can choose
1684            correct agent. */
1685
1686         return rc;
1687 }
1688
1689 /**
1690  * Send a message to any listening copytools
1691  * @param val KUC message (kuc_hdr + hsm_action_list)
1692  * @param len total length of message
1693  */
1694 static int mdc_hsm_copytool_send(int len, void *val)
1695 {
1696         struct kuc_hdr *lh = (struct kuc_hdr *)val;
1697         struct hsm_action_list *hal = (struct hsm_action_list *)(lh + 1);
1698         int rc;
1699         ENTRY;
1700
1701         if (len < sizeof(*lh) + sizeof(*hal)) {
1702                 CERROR("Short HSM message %d < %d\n", len,
1703                       (int) (sizeof(*lh) + sizeof(*hal)));
1704                 RETURN(-EPROTO);
1705         }
1706         if (lh->kuc_magic == __swab16(KUC_MAGIC)) {
1707                 lustre_swab_kuch(lh);
1708                 lustre_swab_hal(hal);
1709         } else if (lh->kuc_magic != KUC_MAGIC) {
1710                 CERROR("Bad magic %x!=%x\n", lh->kuc_magic, KUC_MAGIC);
1711                 RETURN(-EPROTO);
1712         }
1713
1714         CDEBUG(D_HSM, " Received message mg=%x t=%d m=%d l=%d actions=%d\n",
1715                lh->kuc_magic, lh->kuc_transport, lh->kuc_msgtype,
1716                lh->kuc_msglen, hal->hal_count);
1717
1718         /* Broadcast to HSM listeners */
1719         rc = libcfs_kkuc_group_put(KUC_GRP_HSM, lh);
1720
1721         RETURN(rc);
1722 }
1723
1724 int mdc_set_info_async(const struct lu_env *env,
1725                        struct obd_export *exp,
1726                        obd_count keylen, void *key,
1727                        obd_count vallen, void *val,
1728                        struct ptlrpc_request_set *set)
1729 {
1730         struct obd_import *imp = class_exp2cliimp(exp);
1731         int                rc = -EINVAL;
1732         ENTRY;
1733
1734         if (KEY_IS(KEY_READ_ONLY)) {
1735                 if (vallen != sizeof(int))
1736                         RETURN(-EINVAL);
1737
1738                 spin_lock(&imp->imp_lock);
1739                 if (*((int *)val)) {
1740                         imp->imp_connect_flags_orig |= OBD_CONNECT_RDONLY;
1741                         imp->imp_connect_data.ocd_connect_flags |=
1742                                                         OBD_CONNECT_RDONLY;
1743                 } else {
1744                         imp->imp_connect_flags_orig &= ~OBD_CONNECT_RDONLY;
1745                         imp->imp_connect_data.ocd_connect_flags &=
1746                                                         ~OBD_CONNECT_RDONLY;
1747                 }
1748                 spin_unlock(&imp->imp_lock);
1749
1750                 rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
1751                                        keylen, key, vallen, val, set);
1752                 RETURN(rc);
1753         }
1754         if (KEY_IS(KEY_SPTLRPC_CONF)) {
1755                 sptlrpc_conf_client_adapt(exp->exp_obd);
1756                 RETURN(0);
1757         }
1758         if (KEY_IS(KEY_FLUSH_CTX)) {
1759                 sptlrpc_import_flush_my_ctx(imp);
1760                 RETURN(0);
1761         }
1762         if (KEY_IS(KEY_MDS_CONN)) {
1763                 /* mds-mds import */
1764                 spin_lock(&imp->imp_lock);
1765                 imp->imp_server_timeout = 1;
1766                 spin_unlock(&imp->imp_lock);
1767                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
1768                 CDEBUG(D_OTHER, "%s: timeout / 2\n", exp->exp_obd->obd_name);
1769                 RETURN(0);
1770         }
1771         if (KEY_IS(KEY_CHANGELOG_CLEAR)) {
1772                 rc = do_set_info_async(imp, MDS_SET_INFO, LUSTRE_MDS_VERSION,
1773                                        keylen, key, vallen, val, set);
1774                 RETURN(rc);
1775         }
1776         if (KEY_IS(KEY_HSM_COPYTOOL_SEND)) {
1777                 rc = mdc_hsm_copytool_send(vallen, val);
1778                 RETURN(rc);
1779         }
1780
1781         RETURN(rc);
1782 }
1783
1784 int mdc_get_info(const struct lu_env *env, struct obd_export *exp,
1785                  __u32 keylen, void *key, __u32 *vallen, void *val,
1786                  struct lov_stripe_md *lsm)
1787 {
1788         int rc = -EINVAL;
1789
1790         if (KEY_IS(KEY_MAX_EASIZE)) {
1791                 int mdsize, *max_easize;
1792
1793                 if (*vallen != sizeof(int))
1794                         RETURN(-EINVAL);
1795                 mdsize = *(int*)val;
1796                 if (mdsize > exp->exp_obd->u.cli.cl_max_mds_easize)
1797                         exp->exp_obd->u.cli.cl_max_mds_easize = mdsize;
1798                 max_easize = val;
1799                 *max_easize = exp->exp_obd->u.cli.cl_max_mds_easize;
1800                 RETURN(0);
1801         } else if (KEY_IS(KEY_CONN_DATA)) {
1802                 struct obd_import *imp = class_exp2cliimp(exp);
1803                 struct obd_connect_data *data = val;
1804
1805                 if (*vallen != sizeof(*data))
1806                         RETURN(-EINVAL);
1807
1808                 *data = imp->imp_connect_data;
1809                 RETURN(0);
1810         } else if (KEY_IS(KEY_TGT_COUNT)) {
1811                 *((int *)val) = 1;
1812                 RETURN(0);
1813         }
1814
1815         rc = mdc_get_info_rpc(exp, keylen, key, *vallen, val);
1816
1817         RETURN(rc);
1818 }
1819
1820 static int mdc_pin(struct obd_export *exp, const struct lu_fid *fid,
1821                    struct obd_capa *oc, struct obd_client_handle *handle,
1822                    int flags)
1823 {
1824         struct ptlrpc_request *req;
1825         struct mdt_body       *body;
1826         int                    rc;
1827         ENTRY;
1828
1829         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_PIN);
1830         if (req == NULL)
1831                 RETURN(-ENOMEM);
1832
1833         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1834
1835         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_PIN);
1836         if (rc) {
1837                 ptlrpc_request_free(req);
1838                 RETURN(rc);
1839         }
1840
1841         mdc_pack_body(req, fid, oc, 0, 0, -1, flags);
1842
1843         ptlrpc_request_set_replen(req);
1844
1845         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1846         rc = ptlrpc_queue_wait(req);
1847         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1848         if (rc) {
1849                 CERROR("Pin failed: %d\n", rc);
1850                 GOTO(err_out, rc);
1851         }
1852
1853         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
1854         if (body == NULL)
1855                 GOTO(err_out, rc = -EPROTO);
1856
1857         handle->och_fh = body->handle;
1858         handle->och_magic = OBD_CLIENT_HANDLE_MAGIC;
1859
1860         handle->och_mod = obd_mod_alloc();
1861         if (handle->och_mod == NULL) {
1862                 DEBUG_REQ(D_ERROR, req, "can't allocate md_open_data");
1863                 GOTO(err_out, rc = -ENOMEM);
1864         }
1865         handle->och_mod->mod_open_req = req; /* will be dropped by unpin */
1866
1867         RETURN(0);
1868
1869 err_out:
1870         ptlrpc_req_finished(req);
1871         RETURN(rc);
1872 }
1873
1874 static int mdc_unpin(struct obd_export *exp, struct obd_client_handle *handle,
1875                      int flag)
1876 {
1877         struct ptlrpc_request *req;
1878         struct mdt_body       *body;
1879         int                    rc;
1880         ENTRY;
1881
1882         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_UNPIN,
1883                                         LUSTRE_MDS_VERSION, MDS_UNPIN);
1884         if (req == NULL)
1885                 RETURN(-ENOMEM);
1886
1887         body = req_capsule_client_get(&req->rq_pill, &RMF_MDT_BODY);
1888         body->handle = handle->och_fh;
1889         body->flags = flag;
1890
1891         ptlrpc_request_set_replen(req);
1892
1893         mdc_get_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1894         rc = ptlrpc_queue_wait(req);
1895         mdc_put_rpc_lock(exp->exp_obd->u.cli.cl_rpc_lock, NULL);
1896
1897         if (rc != 0)
1898                 CERROR("Unpin failed: %d\n", rc);
1899
1900         ptlrpc_req_finished(req);
1901         ptlrpc_req_finished(handle->och_mod->mod_open_req);
1902
1903         obd_mod_put(handle->och_mod);
1904         RETURN(rc);
1905 }
1906
1907 int mdc_sync(struct obd_export *exp, const struct lu_fid *fid,
1908              struct obd_capa *oc, struct ptlrpc_request **request)
1909 {
1910         struct ptlrpc_request *req;
1911         int                    rc;
1912         ENTRY;
1913
1914         *request = NULL;
1915         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_SYNC);
1916         if (req == NULL)
1917                 RETURN(-ENOMEM);
1918
1919         mdc_set_capa_size(req, &RMF_CAPA1, oc);
1920
1921         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SYNC);
1922         if (rc) {
1923                 ptlrpc_request_free(req);
1924                 RETURN(rc);
1925         }
1926
1927         mdc_pack_body(req, fid, oc, 0, 0, -1, 0);
1928
1929         ptlrpc_request_set_replen(req);
1930
1931         rc = ptlrpc_queue_wait(req);
1932         if (rc)
1933                 ptlrpc_req_finished(req);
1934         else
1935                 *request = req;
1936         RETURN(rc);
1937 }
1938
1939 static int mdc_import_event(struct obd_device *obd, struct obd_import *imp,
1940                             enum obd_import_event event)
1941 {
1942         int rc = 0;
1943
1944         LASSERT(imp->imp_obd == obd);
1945
1946         switch (event) {
1947         case IMP_EVENT_DISCON: {
1948 #if 0
1949                 /* XXX Pass event up to OBDs stack. used only for FLD now */
1950                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DISCON, NULL);
1951 #endif
1952                 break;
1953         }
1954         case IMP_EVENT_INACTIVE: {
1955                 struct client_obd *cli = &obd->u.cli;
1956                 /*
1957                  * Flush current sequence to make client obtain new one
1958                  * from server in case of disconnect/reconnect.
1959                  */
1960                 if (cli->cl_seq != NULL)
1961                         seq_client_flush(cli->cl_seq);
1962
1963                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
1964                 break;
1965         }
1966         case IMP_EVENT_INVALIDATE: {
1967                 struct ldlm_namespace *ns = obd->obd_namespace;
1968
1969                 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
1970
1971                 break;
1972         }
1973         case IMP_EVENT_ACTIVE: {
1974                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
1975                 break;
1976         }
1977         case IMP_EVENT_OCD:
1978                 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
1979                 break;
1980         case IMP_EVENT_DEACTIVATE:
1981         case IMP_EVENT_ACTIVATE:
1982                 break;
1983         default:
1984                 CERROR("Unknown import event %x\n", event);
1985                 LBUG();
1986         }
1987         RETURN(rc);
1988 }
1989
1990 static int mdc_fid_init(struct obd_export *exp)
1991 {
1992         struct client_obd *cli = &exp->exp_obd->u.cli;
1993         char *prefix;
1994         int rc;
1995         ENTRY;
1996
1997         OBD_ALLOC_PTR(cli->cl_seq);
1998         if (cli->cl_seq == NULL)
1999                 RETURN(-ENOMEM);
2000
2001         OBD_ALLOC(prefix, MAX_OBD_NAME + 5);
2002         if (prefix == NULL)
2003                 GOTO(out_free_seq, rc = -ENOMEM);
2004
2005         snprintf(prefix, MAX_OBD_NAME + 5, "srv-%s",
2006                  exp->exp_obd->obd_name);
2007
2008         /* Init client side sequence-manager */
2009         rc = seq_client_init(cli->cl_seq, exp,
2010                              LUSTRE_SEQ_METADATA,
2011                              prefix, NULL);
2012         OBD_FREE(prefix, MAX_OBD_NAME + 5);
2013         if (rc)
2014                 GOTO(out_free_seq, rc);
2015
2016         RETURN(rc);
2017 out_free_seq:
2018         OBD_FREE_PTR(cli->cl_seq);
2019         cli->cl_seq = NULL;
2020         return rc;
2021 }
2022
2023 static int mdc_fid_fini(struct obd_export *exp)
2024 {
2025         struct client_obd *cli = &exp->exp_obd->u.cli;
2026         ENTRY;
2027
2028         if (cli->cl_seq != NULL) {
2029                 seq_client_fini(cli->cl_seq);
2030                 OBD_FREE_PTR(cli->cl_seq);
2031                 cli->cl_seq = NULL;
2032         }
2033
2034         RETURN(0);
2035 }
2036
2037 int mdc_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
2038                   struct md_op_data *op_data)
2039 {
2040         struct client_obd *cli = &exp->exp_obd->u.cli;
2041         struct lu_client_seq *seq = cli->cl_seq;
2042         ENTRY;
2043         RETURN(seq_client_alloc_fid(NULL, seq, fid));
2044 }
2045
2046 /* XXX This method is used only to clear current fid seq
2047  * once fld/mds insert failed */
2048 static int mdc_fid_delete(struct obd_export *exp, const struct lu_fid *fid)
2049 {
2050         struct client_obd *cli = &exp->exp_obd->u.cli;
2051
2052         seq_client_flush(cli->cl_seq);
2053         return 0;
2054 }
2055
2056 struct obd_uuid *mdc_get_uuid(struct obd_export *exp) {
2057         struct client_obd *cli = &exp->exp_obd->u.cli;
2058         return &cli->cl_target_uuid;
2059 }
2060
2061 /**
2062  * Determine whether the lock can be canceled before replaying it during
2063  * recovery, non zero value will be return if the lock can be canceled,
2064  * or zero returned for not
2065  */
2066 static int mdc_cancel_for_recovery(struct ldlm_lock *lock)
2067 {
2068         if (lock->l_resource->lr_type != LDLM_IBITS)
2069                 RETURN(0);
2070
2071         /* FIXME: if we ever get into a situation where there are too many
2072          * opened files with open locks on a single node, then we really
2073          * should replay these open locks to reget it */
2074         if (lock->l_policy_data.l_inodebits.bits & MDS_INODELOCK_OPEN)
2075                 RETURN(0);
2076
2077         RETURN(1);
2078 }
2079
2080 static int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg)
2081 {
2082         struct client_obd *cli = &obd->u.cli;
2083         struct lprocfs_static_vars lvars = { 0 };
2084         int rc;
2085         ENTRY;
2086
2087         OBD_ALLOC(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
2088         if (!cli->cl_rpc_lock)
2089                 RETURN(-ENOMEM);
2090         mdc_init_rpc_lock(cli->cl_rpc_lock);
2091
2092         ptlrpcd_addref();
2093
2094         OBD_ALLOC(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
2095         if (!cli->cl_close_lock)
2096                 GOTO(err_rpc_lock, rc = -ENOMEM);
2097         mdc_init_rpc_lock(cli->cl_close_lock);
2098
2099         rc = client_obd_setup(obd, cfg);
2100         if (rc)
2101                 GOTO(err_close_lock, rc);
2102         lprocfs_mdc_init_vars(&lvars);
2103         lprocfs_obd_setup(obd, lvars.obd_vars);
2104         sptlrpc_lprocfs_cliobd_attach(obd);
2105         ptlrpc_lprocfs_register_obd(obd);
2106
2107         ns_register_cancel(obd->obd_namespace, mdc_cancel_for_recovery);
2108
2109         rc = obd_llog_init(obd, &obd->obd_olg, obd, NULL);
2110         if (rc) {
2111                 mdc_cleanup(obd);
2112                 CERROR("failed to setup llogging subsystems\n");
2113         }
2114
2115         RETURN(rc);
2116
2117 err_close_lock:
2118         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
2119 err_rpc_lock:
2120         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
2121         ptlrpcd_decref();
2122         RETURN(rc);
2123 }
2124
2125 /* Initialize the default and maximum LOV EA and cookie sizes.  This allows
2126  * us to make MDS RPCs with large enough reply buffers to hold the
2127  * maximum-sized (= maximum striped) EA and cookie without having to
2128  * calculate this (via a call into the LOV + OSCs) each time we make an RPC. */
2129 static int mdc_init_ea_size(struct obd_export *exp, int easize,
2130                      int def_easize, int cookiesize)
2131 {
2132         struct obd_device *obd = exp->exp_obd;
2133         struct client_obd *cli = &obd->u.cli;
2134         ENTRY;
2135
2136         if (cli->cl_max_mds_easize < easize)
2137                 cli->cl_max_mds_easize = easize;
2138
2139         if (cli->cl_default_mds_easize < def_easize)
2140                 cli->cl_default_mds_easize = def_easize;
2141
2142         if (cli->cl_max_mds_cookiesize < cookiesize)
2143                 cli->cl_max_mds_cookiesize = cookiesize;
2144
2145         RETURN(0);
2146 }
2147
2148 static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
2149 {
2150         int rc = 0;
2151         ENTRY;
2152
2153         switch (stage) {
2154         case OBD_CLEANUP_EARLY:
2155                 break;
2156         case OBD_CLEANUP_EXPORTS:
2157                 /* Failsafe, ok if racy */
2158                 if (obd->obd_type->typ_refcnt <= 1)
2159                         libcfs_kkuc_group_rem(0, KUC_GRP_HSM);
2160
2161                 obd_cleanup_client_import(obd);
2162                 ptlrpc_lprocfs_unregister_obd(obd);
2163                 lprocfs_obd_cleanup(obd);
2164
2165                 rc = obd_llog_finish(obd, 0);
2166                 if (rc != 0)
2167                         CERROR("failed to cleanup llogging subsystems\n");
2168                 break;
2169         }
2170         RETURN(rc);
2171 }
2172
2173 static int mdc_cleanup(struct obd_device *obd)
2174 {
2175         struct client_obd *cli = &obd->u.cli;
2176
2177         OBD_FREE(cli->cl_rpc_lock, sizeof (*cli->cl_rpc_lock));
2178         OBD_FREE(cli->cl_close_lock, sizeof (*cli->cl_close_lock));
2179
2180         ptlrpcd_decref();
2181
2182         return client_obd_cleanup(obd);
2183 }
2184
2185
2186 static int mdc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
2187                          struct obd_device *tgt, int *index)
2188 {
2189         struct llog_ctxt        *ctxt;
2190         int                      rc;
2191
2192         ENTRY;
2193
2194         LASSERT(olg == &obd->obd_olg);
2195
2196         rc = llog_setup(NULL, obd, olg, LLOG_CHANGELOG_REPL_CTXT, tgt,
2197                         &llog_client_ops);
2198         if (rc)
2199                 RETURN(rc);
2200
2201         ctxt = llog_group_get_ctxt(olg, LLOG_CHANGELOG_REPL_CTXT);
2202         llog_initiator_connect(ctxt);
2203         llog_ctxt_put(ctxt);
2204
2205         RETURN(0);
2206 }
2207
2208 static int mdc_llog_finish(struct obd_device *obd, int count)
2209 {
2210         struct llog_ctxt *ctxt;
2211
2212         ENTRY;
2213
2214         ctxt = llog_get_context(obd, LLOG_CHANGELOG_REPL_CTXT);
2215         if (ctxt)
2216                 llog_cleanup(NULL, ctxt);
2217
2218         RETURN(0);
2219 }
2220
2221 static int mdc_process_config(struct obd_device *obd, obd_count len, void *buf)
2222 {
2223         struct lustre_cfg *lcfg = buf;
2224         struct lprocfs_static_vars lvars = { 0 };
2225         int rc = 0;
2226
2227         lprocfs_mdc_init_vars(&lvars);
2228         switch (lcfg->lcfg_command) {
2229         default:
2230                 rc = class_process_proc_param(PARAM_MDC, lvars.obd_vars,
2231                                               lcfg, obd);
2232                 if (rc > 0)
2233                         rc = 0;
2234                 break;
2235         }
2236         return(rc);
2237 }
2238
2239
2240 /* get remote permission for current user on fid */
2241 int mdc_get_remote_perm(struct obd_export *exp, const struct lu_fid *fid,
2242                         struct obd_capa *oc, __u32 suppgid,
2243                         struct ptlrpc_request **request)
2244 {
2245         struct ptlrpc_request  *req;
2246         int                    rc;
2247         ENTRY;
2248
2249         LASSERT(client_is_remote(exp));
2250
2251         *request = NULL;
2252         req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_MDS_GETATTR);
2253         if (req == NULL)
2254                 RETURN(-ENOMEM);
2255
2256         mdc_set_capa_size(req, &RMF_CAPA1, oc);
2257
2258         rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_GETATTR);
2259         if (rc) {
2260                 ptlrpc_request_free(req);
2261                 RETURN(rc);
2262         }
2263
2264         mdc_pack_body(req, fid, oc, OBD_MD_FLRMTPERM, 0, suppgid, 0);
2265
2266         req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
2267                              sizeof(struct mdt_remote_perm));
2268
2269         ptlrpc_request_set_replen(req);
2270
2271         rc = ptlrpc_queue_wait(req);
2272         if (rc)
2273                 ptlrpc_req_finished(req);
2274         else
2275                 *request = req;
2276         RETURN(rc);
2277 }
2278
2279 static int mdc_interpret_renew_capa(const struct lu_env *env,
2280                                     struct ptlrpc_request *req, void *args,
2281                                     int status)
2282 {
2283         struct mdc_renew_capa_args *ra = args;
2284         struct mdt_body *body = NULL;
2285         struct lustre_capa *capa;
2286         ENTRY;
2287
2288         if (status)
2289                 GOTO(out, capa = ERR_PTR(status));
2290
2291         body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
2292         if (body == NULL)
2293                 GOTO(out, capa = ERR_PTR(-EFAULT));
2294
2295         if ((body->valid & OBD_MD_FLOSSCAPA) == 0)
2296                 GOTO(out, capa = ERR_PTR(-ENOENT));
2297
2298         capa = req_capsule_server_get(&req->rq_pill, &RMF_CAPA2);
2299         if (!capa)
2300                 GOTO(out, capa = ERR_PTR(-EFAULT));
2301         EXIT;
2302 out:
2303         ra->ra_cb(ra->ra_oc, capa);
2304         return 0;
2305 }
2306
2307 static int mdc_renew_capa(struct obd_export *exp, struct obd_capa *oc,
2308                           renew_capa_cb_t cb)
2309 {
2310         struct ptlrpc_request *req;
2311         struct mdc_renew_capa_args *ra;
2312         ENTRY;
2313
2314         req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp), &RQF_MDS_GETATTR,
2315                                         LUSTRE_MDS_VERSION, MDS_GETATTR);
2316         if (req == NULL)
2317                 RETURN(-ENOMEM);
2318
2319         /* NB, OBD_MD_FLOSSCAPA is set here, but it doesn't necessarily mean the
2320          * capa to renew is oss capa.
2321          */
2322         mdc_pack_body(req, &oc->c_capa.lc_fid, oc, OBD_MD_FLOSSCAPA, 0, -1, 0);
2323         ptlrpc_request_set_replen(req);
2324
2325         CLASSERT(sizeof(*ra) <= sizeof(req->rq_async_args));
2326         ra = ptlrpc_req_async_args(req);
2327         ra->ra_oc = oc;
2328         ra->ra_cb = cb;
2329         req->rq_interpret_reply = mdc_interpret_renew_capa;
2330         ptlrpcd_add_req(req, PDL_POLICY_LOCAL, -1);
2331         RETURN(0);
2332 }
2333
2334 static int mdc_connect(const struct lu_env *env,
2335                        struct obd_export **exp,
2336                        struct obd_device *obd, struct obd_uuid *cluuid,
2337                        struct obd_connect_data *data,
2338                        void *localdata)
2339 {
2340         struct obd_import *imp = obd->u.cli.cl_import;
2341
2342         /* mds-mds import features */
2343         if (data && (data->ocd_connect_flags & OBD_CONNECT_MDS_MDS)) {
2344                 spin_lock(&imp->imp_lock);
2345                 imp->imp_server_timeout = 1;
2346                 spin_unlock(&imp->imp_lock);
2347                 imp->imp_client->cli_request_portal = MDS_MDS_PORTAL;
2348                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
2349                        obd->obd_name);
2350         }
2351
2352         return client_connect_import(env, exp, obd, cluuid, data, NULL);
2353 }
2354
2355 struct obd_ops mdc_obd_ops = {
2356         .o_owner            = THIS_MODULE,
2357         .o_setup            = mdc_setup,
2358         .o_precleanup       = mdc_precleanup,
2359         .o_cleanup          = mdc_cleanup,
2360         .o_add_conn         = client_import_add_conn,
2361         .o_del_conn         = client_import_del_conn,
2362         .o_connect          = mdc_connect,
2363         .o_disconnect       = client_disconnect_export,
2364         .o_iocontrol        = mdc_iocontrol,
2365         .o_set_info_async   = mdc_set_info_async,
2366         .o_statfs           = mdc_statfs,
2367         .o_pin              = mdc_pin,
2368         .o_unpin            = mdc_unpin,
2369         .o_fid_init         = mdc_fid_init,
2370         .o_fid_fini         = mdc_fid_fini,
2371         .o_fid_alloc        = mdc_fid_alloc,
2372         .o_fid_delete       = mdc_fid_delete,
2373         .o_import_event     = mdc_import_event,
2374         .o_llog_init        = mdc_llog_init,
2375         .o_llog_finish      = mdc_llog_finish,
2376         .o_get_info         = mdc_get_info,
2377         .o_process_config   = mdc_process_config,
2378         .o_get_uuid         = mdc_get_uuid,
2379         .o_quotactl         = mdc_quotactl,
2380         .o_quotacheck       = mdc_quotacheck
2381 };
2382
2383 struct md_ops mdc_md_ops = {
2384         .m_getstatus        = mdc_getstatus,
2385         .m_change_cbdata    = mdc_change_cbdata,
2386         .m_find_cbdata      = mdc_find_cbdata,
2387         .m_close            = mdc_close,
2388         .m_create           = mdc_create,
2389         .m_done_writing     = mdc_done_writing,
2390         .m_enqueue          = mdc_enqueue,
2391         .m_getattr          = mdc_getattr,
2392         .m_getattr_name     = mdc_getattr_name,
2393         .m_intent_lock      = mdc_intent_lock,
2394         .m_link             = mdc_link,
2395         .m_is_subdir        = mdc_is_subdir,
2396         .m_rename           = mdc_rename,
2397         .m_setattr          = mdc_setattr,
2398         .m_setxattr         = mdc_setxattr,
2399         .m_getxattr         = mdc_getxattr,
2400         .m_sync             = mdc_sync,
2401         .m_readpage         = mdc_readpage,
2402         .m_unlink           = mdc_unlink,
2403         .m_cancel_unused    = mdc_cancel_unused,
2404         .m_init_ea_size     = mdc_init_ea_size,
2405         .m_set_lock_data    = mdc_set_lock_data,
2406         .m_lock_match       = mdc_lock_match,
2407         .m_get_lustre_md    = mdc_get_lustre_md,
2408         .m_free_lustre_md   = mdc_free_lustre_md,
2409         .m_set_open_replay_data = mdc_set_open_replay_data,
2410         .m_clear_open_replay_data = mdc_clear_open_replay_data,
2411         .m_renew_capa       = mdc_renew_capa,
2412         .m_unpack_capa      = mdc_unpack_capa,
2413         .m_get_remote_perm  = mdc_get_remote_perm,
2414         .m_intent_getattr_async = mdc_intent_getattr_async,
2415         .m_revalidate_lock      = mdc_revalidate_lock
2416 };
2417
2418 int __init mdc_init(void)
2419 {
2420         int rc;
2421         struct lprocfs_static_vars lvars = { 0 };
2422         lprocfs_mdc_init_vars(&lvars);
2423
2424         rc = class_register_type(&mdc_obd_ops, &mdc_md_ops, lvars.module_vars,
2425                                  LUSTRE_MDC_NAME, NULL);
2426         RETURN(rc);
2427 }
2428
2429 #ifdef __KERNEL__
2430 static void /*__exit*/ mdc_exit(void)
2431 {
2432         class_unregister_type(LUSTRE_MDC_NAME);
2433 }
2434
2435 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2436 MODULE_DESCRIPTION("Lustre Metadata Client");
2437 MODULE_LICENSE("GPL");
2438
2439 module_init(mdc_init);
2440 module_exit(mdc_exit);
2441 #endif