lustre/osd/osd_handler.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  lustre/osd/osd_handler.c
   5  *  Top-level entry points into osd module
   6  *
   7  *  Copyright (c) 2006 Cluster File Systems, Inc.
   8  *   Author: Nikita Danilov <nikita@clusterfs.com>
   9  *
  10  *   This file is part of the Lustre file system, http://www.lustre.org
  11  *   Lustre is a trademark of Cluster File Systems, Inc.
  12  *
  13  *   You may have signed or agreed to another license before downloading
  14  *   this software.  If so, you are bound by the terms and conditions
  15  *   of that agreement, and the following does not apply to you.  See the
  16  *   LICENSE file included with this distribution for more information.
  17  *
  18  *   If you did not agree to a different license, then this copy of Lustre
  19  *   is open source software; you can redistribute it and/or modify it
  20  *   under the terms of version 2 of the GNU General Public License as
  21  *   published by the Free Software Foundation.
  22  *
  23  *   In either case, Lustre is distributed in the hope that it will be
  24  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  25  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *   license text for more details.
  27  */
  28
  29 #ifndef EXPORT_SYMTAB
  30 # define EXPORT_SYMTAB
  31 #endif
  32 #define DEBUG_SUBSYSTEM S_MDS
  33
  34 #include <linux/module.h>
  35
  36 /* LUSTRE_VERSION_CODE */
  37 #include <lustre_ver.h>
  38 /* prerequisite for linux/xattr.h */
  39 #include <linux/types.h>
  40 /* prerequisite for linux/xattr.h */
  41 #include <linux/fs.h>
  42 /* XATTR_{REPLACE,CREATE} */
  43 #include <linux/xattr.h>
  44 /*
  45  * XXX temporary stuff: direct access to ldiskfs/jdb. Interface between osd
  46  * and file system is not yet specified.
  47  */
  48 /* handle_t, journal_start(), journal_stop() */
  49 #include <linux/jbd.h>
  50 /* LDISKFS_SB() */
  51 #include <linux/ldiskfs_fs.h>
  52 #include <linux/ldiskfs_jbd.h>
  53 /* simple_mkdir() */
  54 #include <lvfs.h>
  55
  56 /*
  57  * struct OBD_{ALLOC,FREE}*()
  58  * OBD_FAIL_CHECK
  59  */
  60 #include <obd_support.h>
  61 /* struct ptlrpc_thread */
  62 #include <lustre_net.h>
  63
  64 /* fid_is_local() */
  65 #include <lustre_fid.h>
  66 #include <linux/lustre_iam.h>
  67
  68 #include "osd_internal.h"
  69 #include "osd_igif.h"
  70
  71 struct osd_directory {
  72         struct iam_container od_container;
  73         struct iam_descr     od_descr;
  74         struct semaphore     od_sem;
  75 };
  76
  77 struct osd_object {
  78         struct dt_object       oo_dt;
  79         /*
  80          * Inode for file system object represented by this osd_object. This
  81          * inode is pinned for the whole duration of lu_object life.
  82          *
  83          * Not modified concurrently (either setup early during object
  84          * creation, or assigned by osd_object_create() under write lock).
  85          */
  86         struct inode          *oo_inode;
  87         struct rw_semaphore    oo_sem;
  88         struct osd_directory  *oo_dir;
  89         /* protects inode attributes. */
  90         spinlock_t             oo_guard;
  91 #if OSD_COUNTERS
  92         const struct lu_env   *oo_owner;
  93 #endif
  94 };
  95
  96 static int   osd_root_get      (const struct lu_env *env,
  97                                 struct dt_device *dev, struct lu_fid *f);
  98
  99 static int   lu_device_is_osd  (const struct lu_device *d);
 100 static void  osd_mod_exit      (void) __exit;
 101 static int   osd_mod_init      (void) __init;
 102 static int   osd_type_init     (struct lu_device_type *t);
 103 static void  osd_type_fini     (struct lu_device_type *t);
 104 static int   osd_object_init   (const struct lu_env *env,
 105                                 struct lu_object *l);
 106 static void  osd_object_release(const struct lu_env *env,
 107                                 struct lu_object *l);
 108 static int   osd_object_print  (const struct lu_env *env, void *cookie,
 109                                 lu_printer_t p, const struct lu_object *o);
 110 static struct lu_device *osd_device_free   (const struct lu_env *env,
 111                                 struct lu_device *m);
 112 static void *osd_key_init      (const struct lu_context *ctx,
 113                                 struct lu_context_key *key);
 114 static void  osd_key_fini      (const struct lu_context *ctx,
 115                                 struct lu_context_key *key, void *data);
 116 static void  osd_key_exit      (const struct lu_context *ctx,
 117                                 struct lu_context_key *key, void *data);
 118 static int   osd_has_index     (const struct osd_object *obj);
 119 static void  osd_object_init0  (struct osd_object *obj);
 120 static int   osd_device_init   (const struct lu_env *env,
 121                                 struct lu_device *d, const char *,
 122                                 struct lu_device *);
 123 static int   osd_fid_lookup    (const struct lu_env *env,
 124                                 struct osd_object *obj,
 125                                 const struct lu_fid *fid);
 126 static void  osd_inode_getattr (const struct lu_env *env,
 127                                 struct inode *inode, struct lu_attr *attr);
 128 static void  osd_inode_setattr (const struct lu_env *env,
 129                                 struct inode *inode, const struct lu_attr *attr);
 130 static int   osd_param_is_sane (const struct osd_device *dev,
 131                                 const struct txn_param *param);
 132 static int   osd_index_lookup  (const struct lu_env *env,
 133                                 struct dt_object *dt,
 134                                 struct dt_rec *rec, const struct dt_key *key,
 135                                 struct lustre_capa *capa);
 136 static int   osd_index_insert  (const struct lu_env *env,
 137                                 struct dt_object *dt,
 138                                 const struct dt_rec *rec,
 139                                 const struct dt_key *key,
 140                                 struct thandle *handle,
 141                                 struct lustre_capa *capa);
 142 static int   osd_index_delete  (const struct lu_env *env,
 143                                 struct dt_object *dt, const struct dt_key *key,
 144                                 struct thandle *handle,
 145                                 struct lustre_capa *capa);
 146 static int   osd_index_probe   (const struct lu_env *env,
 147                                 struct osd_object *o,
 148                                 const struct dt_index_features *feat);
 149 static int   osd_index_try     (const struct lu_env *env,
 150                                 struct dt_object *dt,
 151                                 const struct dt_index_features *feat);
 152 static void  osd_index_fini    (struct osd_object *o);
 153
 154 static void  osd_it_fini       (const struct lu_env *env, struct dt_it *di);
 155 static int   osd_it_get        (const struct lu_env *env,
 156                                 struct dt_it *di, const struct dt_key *key);
 157 static void  osd_it_put        (const struct lu_env *env, struct dt_it *di);
 158 static int   osd_it_next       (const struct lu_env *env, struct dt_it *di);
 159 static int   osd_it_del        (const struct lu_env *env, struct dt_it *di,
 160                                 struct thandle *th);
 161 static int   osd_it_key_size   (const struct lu_env *env,
 162                                 const struct dt_it *di);
 163 static void  osd_conf_get      (const struct lu_env *env,
 164                                 const struct dt_device *dev,
 165                                 struct dt_device_param *param);
 166 static void  osd_trans_stop    (const struct lu_env *env,
 167                                 struct thandle *th);
 168 static int   osd_object_is_root(const struct osd_object *obj);
 169
 170 static struct osd_object  *osd_obj          (const struct lu_object *o);
 171 static struct osd_device  *osd_dev          (const struct lu_device *d);
 172 static struct osd_device  *osd_dt_dev       (const struct dt_device *d);
 173 static struct osd_object  *osd_dt_obj       (const struct dt_object *d);
 174 static struct osd_device  *osd_obj2dev      (const struct osd_object *o);
 175 static struct lu_device   *osd2lu_dev       (struct osd_device *osd);
 176 static struct lu_device   *osd_device_fini  (const struct lu_env *env,
 177                                              struct lu_device *d);
 178 static struct lu_device   *osd_device_alloc (const struct lu_env *env,
 179                                              struct lu_device_type *t,
 180                                              struct lustre_cfg *cfg);
 181 static struct lu_object   *osd_object_alloc (const struct lu_env *env,
 182                                              const struct lu_object_header *hdr,
 183                                              struct lu_device *d);
 184 static struct inode       *osd_iget         (struct osd_thread_info *info,
 185                                              struct osd_device *dev,
 186                                              const struct osd_inode_id *id);
 187 static struct super_block *osd_sb           (const struct osd_device *dev);
 188 static struct dt_it       *osd_it_init      (const struct lu_env *env,
 189                                              struct dt_object *dt, int wable,
 190                                              struct lustre_capa *capa);
 191 static struct dt_key      *osd_it_key       (const struct lu_env *env,
 192                                              const struct dt_it *di);
 193 static struct dt_rec      *osd_it_rec       (const struct lu_env *env,
 194                                              const struct dt_it *di);
 195 static struct timespec    *osd_inode_time   (const struct lu_env *env,
 196                                              struct inode *inode,
 197                                              __u64 seconds);
 198 static struct thandle     *osd_trans_start  (const struct lu_env *env,
 199                                              struct dt_device *d,
 200                                              struct txn_param *p);
 201 static journal_t          *osd_journal      (const struct osd_device *dev);
 202
 203 static struct lu_device_type_operations osd_device_type_ops;
 204 static struct lu_device_type            osd_device_type;
 205 static struct lu_object_operations      osd_lu_obj_ops;
 206 static struct obd_ops                   osd_obd_device_ops;
 207 static struct lu_device_operations      osd_lu_ops;
 208 static struct lu_context_key            osd_key;
 209 static struct dt_object_operations      osd_obj_ops;
 210 static struct dt_body_operations        osd_body_ops;
 211 static struct dt_index_operations       osd_index_ops;
 212 static struct dt_index_operations       osd_index_compat_ops;
 213
 214 struct osd_thandle {
 215         struct thandle          ot_super;
 216         handle_t               *ot_handle;
 217         struct journal_callback ot_jcb;
 218 };
 219
 220 /*
 221  * Invariants, assertions.
 222  */
 223
 224 /*
 225  * XXX: do not enable this, until invariant checking code is made thread safe
 226  * in the face of pdirops locking.
 227  */
 228 #define OSD_INVARIANT_CHECKS (0)
 229
 230 #if OSD_INVARIANT_CHECKS
 231 static int osd_invariant(const struct osd_object *obj)
 232 {
 233         return
 234                 obj != NULL &&
 235                 ergo(obj->oo_inode != NULL,
 236                      obj->oo_inode->i_sb == osd_sb(osd_obj2dev(obj)) &&
 237                      atomic_read(&obj->oo_inode->i_count) > 0) &&
 238                 ergo(obj->oo_dir != NULL &&
 239                      obj->oo_dir->od_conationer.ic_object != NULL,
 240                      obj->oo_dir->od_conationer.ic_object == obj->oo_inode);
 241 }
 242 #else
 243 #define osd_invariant(obj) (1)
 244 #endif
 245
 246 static inline struct osd_thread_info *osd_oti_get(const struct lu_env *env)
 247 {
 248         return lu_context_key_get(&env->le_ctx, &osd_key);
 249 }
 250
 251 #if OSD_COUNTERS
 252 /*
 253  * Concurrency: doesn't matter
 254  */
 255 static int osd_read_locked(const struct lu_env *env, struct osd_object *o)
 256 {
 257         return osd_oti_get(env)->oti_r_locks > 0;
 258 }
 259
 260 /*
 261  * Concurrency: doesn't matter
 262  */
 263 static int osd_write_locked(const struct lu_env *env, struct osd_object *o)
 264 {
 265         struct osd_thread_info *oti = osd_oti_get(env);
 266         return oti->oti_w_locks > 0 && o->oo_owner == env;
 267 }
 268
 269 #define OSD_COUNTERS_DO(exp) exp
 270 #else
 271
 272
 273 #define osd_read_locked(env, o) (1)
 274 #define osd_write_locked(env, o) (1)
 275 #define OSD_COUNTERS_DO(exp) ((void)0)
 276 #endif
 277
 278 /*
 279  * Concurrency: doesn't access mutable data
 280  */
 281 static int osd_root_get(const struct lu_env *env,
 282                         struct dt_device *dev, struct lu_fid *f)
 283 {
 284         struct inode *inode;
 285
 286         inode = osd_sb(osd_dt_dev(dev))->s_root->d_inode;
 287         lu_igif_build(f, inode->i_ino, inode->i_generation);
 288         return 0;
 289 }
 290
 291 /*
 292  * OSD object methods.
 293  */
 294
 295 /*
 296  * Concurrency: no concurrent access is possible that early in object
 297  * life-cycle.
 298  */
 299 static struct lu_object *osd_object_alloc(const struct lu_env *env,
 300                                           const struct lu_object_header *hdr,
 301                                           struct lu_device *d)
 302 {
 303         struct osd_object *mo;
 304
 305         OBD_ALLOC_PTR(mo);
 306         if (mo != NULL) {
 307                 struct lu_object *l;
 308
 309                 l = &mo->oo_dt.do_lu;
 310                 dt_object_init(&mo->oo_dt, NULL, d);
 311                 mo->oo_dt.do_ops = &osd_obj_ops;
 312                 l->lo_ops = &osd_lu_obj_ops;
 313                 init_rwsem(&mo->oo_sem);
 314                 spin_lock_init(&mo->oo_guard);
 315                 return l;
 316         } else
 317                 return NULL;
 318 }
 319
 320 /*
 321  * Concurrency: shouldn't matter.
 322  */
 323 static void osd_object_init0(struct osd_object *obj)
 324 {
 325         LASSERT(obj->oo_inode != NULL);
 326         obj->oo_dt.do_body_ops = &osd_body_ops;
 327         obj->oo_dt.do_lu.lo_header->loh_attr |=
 328                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
 329 }
 330
 331 /*
 332  * Concurrency: no concurrent access is possible that early in object
 333  * life-cycle.
 334  */
 335 static int osd_object_init(const struct lu_env *env, struct lu_object *l)
 336 {
 337         struct osd_object *obj = osd_obj(l);
 338         int result;
 339
 340         LASSERT(osd_invariant(obj));
 341
 342         result = osd_fid_lookup(env, obj, lu_object_fid(l));
 343         if (result == 0) {
 344                 if (obj->oo_inode != NULL)
 345                         osd_object_init0(obj);
 346         }
 347         LASSERT(osd_invariant(obj));
 348         return result;
 349 }
 350
 351 /*
 352  * Concurrency: no concurrent access is possible that late in object
 353  * life-cycle.
 354  */
 355 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
 356 {
 357         struct osd_object *obj = osd_obj(l);
 358
 359         LASSERT(osd_invariant(obj));
 360
 361         dt_object_fini(&obj->oo_dt);
 362         OBD_FREE_PTR(obj);
 363 }
 364
 365 static struct iam_path_descr *osd_ipd_get(const struct lu_env *env,
 366                                           const struct iam_container *bag)
 367 {
 368         return bag->ic_descr->id_ops->id_ipd_alloc(bag,
 369                                                    osd_oti_get(env)->oti_ipd);
 370 }
 371
 372 static void osd_ipd_put(const struct lu_env *env,
 373                         const struct iam_container *bag,
 374                         struct iam_path_descr *ipd)
 375 {
 376         bag->ic_descr->id_ops->id_ipd_free(ipd);
 377 }
 378
 379 /*
 380  * Concurrency: no concurrent access is possible that late in object
 381  * life-cycle.
 382  */
 383 static void osd_index_fini(struct osd_object *o)
 384 {
 385         struct iam_container *bag;
 386
 387         if (o->oo_dir != NULL) {
 388                 bag = &o->oo_dir->od_container;
 389                 if (o->oo_inode != NULL) {
 390                         if (bag->ic_object == o->oo_inode)
 391                                 iam_container_fini(bag);
 392                 }
 393                 OBD_FREE_PTR(o->oo_dir);
 394                 o->oo_dir = NULL;
 395         }
 396 }
 397
 398 /*
 399  * Concurrency: no concurrent access is possible that late in object
 400  * life-cycle (for all existing callers, that is. New callers have to provide
 401  * their own locking.)
 402  */
 403 static int osd_inode_unlinked(const struct inode *inode)
 404 {
 405         return inode->i_nlink == 0;
 406 }
 407
 408 enum {
 409         OSD_TXN_OI_DELETE_CREDITS    = 20,
 410         OSD_TXN_INODE_DELETE_CREDITS = 20
 411 };
 412
 413 /*
 414  * Concurrency: no concurrent access is possible that late in object
 415  * life-cycle.
 416  */
 417 static int osd_inode_remove(const struct lu_env *env, struct osd_object *obj)
 418 {
 419         const struct lu_fid    *fid = lu_object_fid(&obj->oo_dt.do_lu);
 420         struct osd_device      *osd = osd_obj2dev(obj);
 421         struct osd_thread_info *oti = osd_oti_get(env);
 422         struct txn_param       *prm = &oti->oti_txn;
 423         struct thandle         *th;
 424         int result;
 425
 426         txn_param_init(prm, OSD_TXN_OI_DELETE_CREDITS +
 427                             OSD_TXN_INODE_DELETE_CREDITS);
 428         th = osd_trans_start(env, &osd->od_dt_dev, prm);
 429         if (!IS_ERR(th)) {
 430                 result = osd_oi_delete(oti, &osd->od_oi, fid, th);
 431                 osd_trans_stop(env, th);
 432         } else
 433                 result = PTR_ERR(th);
 434         return result;
 435 }
 436
 437 /*
 438  * Called just before object is freed. Releases all resources except for
 439  * object itself (that is released by osd_object_free()).
 440  *
 441  * Concurrency: no concurrent access is possible that late in object
 442  * life-cycle.
 443  */
 444 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
 445 {
 446         struct osd_object *obj   = osd_obj(l);
 447         struct inode      *inode = obj->oo_inode;
 448
 449         LASSERT(osd_invariant(obj));
 450
 451         /*
 452          * If object is unlinked remove fid->ino mapping from object index.
 453          *
 454          * File body will be deleted by iput().
 455          */
 456
 457         osd_index_fini(obj);
 458         if (inode != NULL) {
 459                 int result;
 460
 461                 if (osd_inode_unlinked(inode)) {
 462                         result = osd_inode_remove(env, obj);
 463                         if (result != 0)
 464                                 LU_OBJECT_DEBUG(D_ERROR, env, l,
 465                                                 "Failed to cleanup: %d\n",
 466                                                 result);
 467                 }
 468                 iput(inode);
 469                 obj->oo_inode = NULL;
 470         }
 471 }
 472
 473 /*
 474  * Concurrency: ->loo_object_release() is called under site spin-lock.
 475  */
 476 static void osd_object_release(const struct lu_env *env,
 477                                struct lu_object *l)
 478 {
 479         struct osd_object *o = osd_obj(l);
 480
 481         LASSERT(!lu_object_is_dying(l->lo_header));
 482         if (o->oo_inode != NULL && osd_inode_unlinked(o->oo_inode))
 483                 set_bit(LU_OBJECT_HEARD_BANSHEE, &l->lo_header->loh_flags);
 484 }
 485
 486 /*
 487  * Concurrency: shouldn't matter.
 488  */
 489 static int osd_object_print(const struct lu_env *env, void *cookie,
 490                             lu_printer_t p, const struct lu_object *l)
 491 {
 492         struct osd_object *o = osd_obj(l);
 493         struct iam_descr  *d;
 494
 495         if (o->oo_dir != NULL)
 496                 d = o->oo_dir->od_container.ic_descr;
 497         else
 498                 d = NULL;
 499         return (*p)(env, cookie, LUSTRE_OSD_NAME"-object@%p(i:%p:%lu/%u)[%s]",
 500                     o, o->oo_inode,
 501                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
 502                     o->oo_inode ? o->oo_inode->i_generation : 0,
 503                     d ? d->id_ops->id_name : "plain");
 504 }
 505
 506 /*
 507  * Concurrency: shouldn't matter.
 508  */
 509 int osd_statfs(const struct lu_env *env, struct dt_device *d,
 510                struct kstatfs *sfs)
 511 {
 512         struct osd_device *osd = osd_dt_dev(d);
 513         struct super_block *sb = osd_sb(osd);
 514         int result = 0;
 515
 516         spin_lock(&osd->od_osfs_lock);
 517         /* cache 1 second */
 518         if (cfs_time_before_64(osd->od_osfs_age, cfs_time_shift_64(-1))) {
 519                 result = ll_do_statfs(sb, &osd->od_kstatfs);
 520                 if (likely(result == 0)) /* N.B. statfs can't really fail */
 521                         osd->od_osfs_age = cfs_time_current_64();
 522         }
 523
 524         if (likely(result == 0))
 525                 *sfs = osd->od_kstatfs;
 526         spin_unlock(&osd->od_osfs_lock);
 527
 528         return result;
 529 }
 530
 531 /*
 532  * Concurrency: doesn't access mutable data.
 533  */
 534 static void osd_conf_get(const struct lu_env *env,
 535                          const struct dt_device *dev,
 536                          struct dt_device_param *param)
 537 {
 538         /*
 539          * XXX should be taken from not-yet-existing fs abstraction layer.
 540          */
 541         param->ddp_max_name_len  = LDISKFS_NAME_LEN;
 542         param->ddp_max_nlink     = LDISKFS_LINK_MAX;
 543         param->ddp_block_shift   = osd_sb(osd_dt_dev(dev))->s_blocksize_bits;
 544 }
 545
 546 /*
 547  * Journal
 548  */
 549
 550 /*
 551  * Concurrency: doesn't access mutable data.
 552  */
 553 static int osd_param_is_sane(const struct osd_device *dev,
 554                              const struct txn_param *param)
 555 {
 556         return param->tp_credits <= osd_journal(dev)->j_max_transaction_buffers;
 557 }
 558
 559 /*
 560  * Concurrency: shouldn't matter.
 561  */
 562 static void osd_trans_commit_cb(struct journal_callback *jcb, int error)
 563 {
 564         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
 565         struct thandle     *th = &oh->ot_super;
 566         struct dt_device   *dev = th->th_dev;
 567
 568         LASSERT(dev != NULL);
 569         LASSERT(oh->ot_handle == NULL);
 570
 571         if (error) {
 572                 CERROR("transaction @0x%p commit error: %d\n", th, error);
 573         } else {
 574                 struct lu_env *env = &osd_dt_dev(dev)->od_env_for_commit;
 575                 /*
 576                  * This od_env_for_commit is only for commit usage.  see
 577                  * "struct dt_device"
 578                  */
 579                 lu_context_enter(&env->le_ctx);
 580                 dt_txn_hook_commit(env, th);
 581                 lu_context_exit(&env->le_ctx);
 582         }
 583
 584         lu_device_put(&dev->dd_lu_dev);
 585         th->th_dev = NULL;
 586
 587         lu_context_exit(&th->th_ctx);
 588         lu_context_fini(&th->th_ctx);
 589         OBD_FREE_PTR(oh);
 590 }
 591
 592 /*
 593  * Concurrency: shouldn't matter.
 594  */
 595 static struct thandle *osd_trans_start(const struct lu_env *env,
 596                                        struct dt_device *d,
 597                                        struct txn_param *p)
 598 {
 599         struct osd_device  *dev = osd_dt_dev(d);
 600         handle_t           *jh;
 601         struct osd_thandle *oh;
 602         struct thandle     *th;
 603         int hook_res;
 604
 605         ENTRY;
 606
 607         hook_res = dt_txn_hook_start(env, d, p);
 608         if (hook_res != 0)
 609                 RETURN(ERR_PTR(hook_res));
 610
 611         if (osd_param_is_sane(dev, p)) {
 612                 OBD_ALLOC_GFP(oh, sizeof *oh, CFS_ALLOC_IO);
 613                 if (oh != NULL) {
 614                         /*
 615                          * XXX temporary stuff. Some abstraction layer should
 616                          * be used.
 617                          */
 618
 619                         jh = journal_start(osd_journal(dev), p->tp_credits);
 620                         if (!IS_ERR(jh)) {
 621                                 oh->ot_handle = jh;
 622                                 th = &oh->ot_super;
 623                                 th->th_dev = d;
 624                                 th->th_result = 0;
 625                                 jh->h_sync = p->tp_sync;
 626                                 lu_device_get(&d->dd_lu_dev);
 627                                 /* add commit callback */
 628                                 lu_context_init(&th->th_ctx, LCT_TX_HANDLE);
 629                                 lu_context_enter(&th->th_ctx);
 630                                 journal_callback_set(jh, osd_trans_commit_cb,
 631                                                      (struct journal_callback *)&oh->ot_jcb);
 632 #if OSD_COUNTERS
 633                                 {
 634                                         struct osd_thread_info *oti =
 635                                                 osd_oti_get(env);
 636
 637                                         LASSERT(oti->oti_txns == 0);
 638                                         LASSERT(oti->oti_r_locks == 0);
 639                                         LASSERT(oti->oti_w_locks == 0);
 640                                         oti->oti_txns++;
 641                                 }
 642 #endif
 643                         } else {
 644                                 OBD_FREE_PTR(oh);
 645                                 th = (void *)jh;
 646                         }
 647                 } else
 648                         th = ERR_PTR(-ENOMEM);
 649         } else {
 650                 CERROR("Invalid transaction parameters\n");
 651                 th = ERR_PTR(-EINVAL);
 652         }
 653
 654         RETURN(th);
 655 }
 656
 657 /*
 658  * Concurrency: shouldn't matter.
 659  */
 660 static void osd_trans_stop(const struct lu_env *env, struct thandle *th)
 661 {
 662         int result;
 663         struct osd_thandle *oh;
 664
 665         ENTRY;
 666
 667         oh = container_of0(th, struct osd_thandle, ot_super);
 668         if (oh->ot_handle != NULL) {
 669                 handle_t *hdl = oh->ot_handle;
 670                 /*
 671                  * XXX temporary stuff. Some abstraction layer should be used.
 672                  */
 673                 result = dt_txn_hook_stop(env, th);
 674                 if (result != 0)
 675                         CERROR("Failure in transaction hook: %d\n", result);
 676
 677                 /**/
 678                 oh->ot_handle = NULL;
 679                 result = journal_stop(hdl);
 680                 if (result != 0)
 681                         CERROR("Failure to stop transaction: %d\n", result);
 682
 683 #if OSD_COUNTERS
 684                 {
 685                         struct osd_thread_info *oti = osd_oti_get(env);
 686
 687                         LASSERT(oti->oti_txns == 1);
 688                         LASSERT(oti->oti_r_locks == 0);
 689                         LASSERT(oti->oti_w_locks == 0);
 690                         oti->oti_txns--;
 691                 }
 692 #endif
 693         }
 694         EXIT;
 695 }
 696
 697 /*
 698  * Concurrency: shouldn't matter.
 699  */
 700 static int osd_sync(const struct lu_env *env, struct dt_device *d)
 701 {
 702         CDEBUG(D_HA, "syncing OSD %s\n", LUSTRE_OSD_NAME);
 703         return ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
 704 }
 705
 706 /*
 707  * Concurrency: shouldn't matter.
 708  */
 709 lvfs_sbdev_type fsfilt_ldiskfs_journal_sbdev(struct super_block *);
 710
 711 static void osd_ro(const struct lu_env *env, struct dt_device *d)
 712 {
 713         ENTRY;
 714
 715         CERROR("*** setting device %s read-only ***\n", LUSTRE_OSD_NAME);
 716
 717         __lvfs_set_rdonly(lvfs_sbdev(osd_sb(osd_dt_dev(d))),
 718                           fsfilt_ldiskfs_journal_sbdev(osd_sb(osd_dt_dev(d))));
 719         EXIT;
 720 }
 721
 722 /*
 723  * Concurrency: serialization provided by callers.
 724  */
 725 static int osd_init_capa_ctxt(const struct lu_env *env, struct dt_device *d,
 726                               int mode, unsigned long timeout, __u32 alg,
 727                               struct lustre_capa_key *keys)
 728 {
 729         struct osd_device *dev = osd_dt_dev(d);
 730         ENTRY;
 731
 732         dev->od_fl_capa = mode;
 733         dev->od_capa_timeout = timeout;
 734         dev->od_capa_alg = alg;
 735         dev->od_capa_keys = keys;
 736         RETURN(0);
 737 }
 738
 739 /* Note: we did not count into QUOTA here, If we mount with --data_journal
 740  * we may need more*/
 741 static const int osd_dto_credits[DTO_NR] = {
 742         /*
 743          * Insert/Delete. IAM EXT3_INDEX_EXTRA_TRANS_BLOCKS(8) +
 744          * EXT3_SINGLEDATA_TRANS_BLOCKS 8 XXX Note: maybe iam need more,since
 745          * iam have more level than Ext3 htree
 746          */
 747         [DTO_INDEX_INSERT]  = 16,
 748         [DTO_INDEX_DELETE]  = 16,
 749         [DTO_IDNEX_UPDATE]  = 16,
 750         /*
 751          * Create a object. Same as create object in Ext3 filesystem, but did
 752          * not count QUOTA i EXT3_DATA_TRANS_BLOCKS(12) +
 753          * INDEX_EXTRA_BLOCKS(8) + 3(inode bits,groups, GDT)
 754          */
 755         [DTO_OBJECT_CREATE] = 23,
 756         [DTO_OBJECT_DELETE] = 23,
 757         /*
 758          * Attr set credits 3 inode, group, GDT
 759          */
 760         [DTO_ATTR_SET]      = 3,
 761         /*
 762          * XATTR_SET. SAME AS XATTR of EXT3 EXT3_DATA_TRANS_BLOCKS XXX Note:
 763          * in original MDS implmentation EXT3_INDEX_EXTRA_TRANS_BLOCKS are
 764          * also counted in. Do not know why?
 765          */
 766         [DTO_XATTR_SET]     = 16,
 767         [DTO_LOG_REC]       = 16,
 768         /* creadits for inode change during write */
 769         [DTO_WRITE_BASE]    = 3,
 770         /* credits for single block write */
 771         [DTO_WRITE_BLOCK]   = 12
 772 };
 773
 774 static int osd_credit_get(const struct lu_env *env, struct dt_device *d,
 775                           enum dt_txn_op op)
 776 {
 777         LASSERT(0 <= op && op < ARRAY_SIZE(osd_dto_credits));
 778         return osd_dto_credits[op];
 779 }
 780
 781 static struct dt_device_operations osd_dt_ops = {
 782         .dt_root_get       = osd_root_get,
 783         .dt_statfs         = osd_statfs,
 784         .dt_trans_start    = osd_trans_start,
 785         .dt_trans_stop     = osd_trans_stop,
 786         .dt_conf_get       = osd_conf_get,
 787         .dt_sync           = osd_sync,
 788         .dt_ro             = osd_ro,
 789         .dt_credit_get     = osd_credit_get,
 790         .dt_init_capa_ctxt = osd_init_capa_ctxt,
 791 };
 792
 793 static void osd_object_read_lock(const struct lu_env *env,
 794                                  struct dt_object *dt)
 795 {
 796         struct osd_object *obj = osd_dt_obj(dt);
 797
 798         LASSERT(osd_invariant(obj));
 799
 800         OSD_COUNTERS_DO(LASSERT(obj->oo_owner != env));
 801         down_read(&obj->oo_sem);
 802 #if OSD_COUNTERS
 803         {
 804                 struct osd_thread_info *oti = osd_oti_get(env);
 805
 806                 LASSERT(obj->oo_owner == NULL);
 807                 oti->oti_r_locks++;
 808         }
 809 #endif
 810 }
 811
 812 static void osd_object_write_lock(const struct lu_env *env,
 813                                   struct dt_object *dt)
 814 {
 815         struct osd_object *obj = osd_dt_obj(dt);
 816
 817         LASSERT(osd_invariant(obj));
 818
 819         OSD_COUNTERS_DO(LASSERT(obj->oo_owner != env));
 820         down_write(&obj->oo_sem);
 821 #if OSD_COUNTERS
 822         {
 823                 struct osd_thread_info *oti = osd_oti_get(env);
 824
 825                 LASSERT(obj->oo_owner == NULL);
 826                 obj->oo_owner = env;
 827                 oti->oti_w_locks++;
 828         }
 829 #endif
 830 }
 831
 832 static void osd_object_read_unlock(const struct lu_env *env,
 833                                    struct dt_object *dt)
 834 {
 835         struct osd_object *obj = osd_dt_obj(dt);
 836
 837         LASSERT(osd_invariant(obj));
 838 #if OSD_COUNTERS
 839         {
 840                 struct osd_thread_info *oti = osd_oti_get(env);
 841
 842                 LASSERT(oti->oti_r_locks > 0);
 843                 oti->oti_r_locks--;
 844         }
 845 #endif
 846         up_read(&obj->oo_sem);
 847 }
 848
 849 static void osd_object_write_unlock(const struct lu_env *env,
 850                                     struct dt_object *dt)
 851 {
 852         struct osd_object *obj = osd_dt_obj(dt);
 853
 854         LASSERT(osd_invariant(obj));
 855 #if OSD_COUNTERS
 856         {
 857                 struct osd_thread_info *oti = osd_oti_get(env);
 858
 859                 LASSERT(obj->oo_owner == env);
 860                 LASSERT(oti->oti_w_locks > 0);
 861                 oti->oti_w_locks--;
 862                 obj->oo_owner = NULL;
 863         }
 864 #endif
 865         up_write(&obj->oo_sem);
 866 }
 867
 868 static int capa_is_sane(const struct lu_env *env,
 869                         struct osd_device *dev,
 870                         struct lustre_capa *capa,
 871                         struct lustre_capa_key *keys)
 872 {
 873         struct osd_thread_info *oti = osd_oti_get(env);
 874         struct obd_capa *oc;
 875         int i, rc = 0;
 876         ENTRY;
 877
 878         oc = capa_lookup(dev->od_capa_hash, capa, 0);
 879         if (oc) {
 880                 if (capa_is_expired(oc)) {
 881                         DEBUG_CAPA(D_ERROR, capa, "expired");
 882                         rc = -ESTALE;
 883                 }
 884                 capa_put(oc);
 885                 RETURN(rc);
 886         }
 887
 888         spin_lock(&capa_lock);
 889         for (i = 0; i < 2; i++) {
 890                 if (keys[i].lk_keyid == capa->lc_keyid) {
 891                         oti->oti_capa_key = keys[i];
 892                         break;
 893                 }
 894         }
 895         spin_unlock(&capa_lock);
 896
 897         if (i == 2) {
 898                 DEBUG_CAPA(D_ERROR, capa, "no matched capa key");
 899                 RETURN(-ESTALE);
 900         }
 901
 902         rc = capa_hmac(oti->oti_capa.lc_hmac, capa, oti->oti_capa_key.lk_key);
 903         if (rc)
 904                 RETURN(rc);
 905         if (memcmp(oti->oti_capa.lc_hmac, capa->lc_hmac, sizeof(capa->lc_hmac)))
 906         {
 907                 DEBUG_CAPA(D_ERROR, capa, "HMAC mismatch");
 908                 RETURN(-EACCES);
 909         }
 910
 911         oc = capa_add(dev->od_capa_hash, capa);
 912         capa_put(oc);
 913
 914         RETURN(0);
 915 }
 916
 917 static int osd_object_auth(const struct lu_env *env, struct dt_object *dt,
 918                            struct lustre_capa *capa, __u64 opc)
 919 {
 920         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
 921         struct osd_device *dev = osd_dev(dt->do_lu.lo_dev);
 922         int rc;
 923
 924         if (!dev->od_fl_capa)
 925                 return 0;
 926
 927         if (capa == BYPASS_CAPA)
 928                 return 0;
 929
 930         if (!capa) {
 931                 CERROR("no capability is provided for fid "DFID"\n", PFID(fid));
 932                 return -EACCES;
 933         }
 934
 935         if (!lu_fid_eq(fid, &capa->lc_fid)) {
 936                 DEBUG_CAPA(D_ERROR, capa, "fid "DFID" mismatch with",
 937                            PFID(fid));
 938                 return -EACCES;
 939         }
 940
 941         if (!capa_opc_supported(capa, opc)) {
 942                 DEBUG_CAPA(D_ERROR, capa, "opc "LPX64" not supported by", opc);
 943                 return -EACCES;
 944         }
 945
 946         if ((rc = capa_is_sane(env, dev, capa, dev->od_capa_keys))) {
 947                 DEBUG_CAPA(D_ERROR, capa, "insane (rc %d)", rc);
 948                 return -EACCES;
 949         }
 950
 951         return 0;
 952 }
 953
 954 static int osd_attr_get(const struct lu_env *env,
 955                         struct dt_object *dt,
 956                         struct lu_attr *attr,
 957                         struct lustre_capa *capa)
 958 {
 959         struct osd_object *obj = osd_dt_obj(dt);
 960
 961         LASSERT(dt_object_exists(dt));
 962         LASSERT(osd_invariant(obj));
 963
 964         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
 965                 return -EACCES;
 966
 967         spin_lock(&obj->oo_guard);
 968         osd_inode_getattr(env, obj->oo_inode, attr);
 969         spin_unlock(&obj->oo_guard);
 970         return 0;
 971 }
 972
 973 static int osd_attr_set(const struct lu_env *env,
 974                         struct dt_object *dt,
 975                         const struct lu_attr *attr,
 976                         struct thandle *handle,
 977                         struct lustre_capa *capa)
 978 {
 979         struct osd_object *obj = osd_dt_obj(dt);
 980
 981         LASSERT(handle != NULL);
 982         LASSERT(dt_object_exists(dt));
 983         LASSERT(osd_invariant(obj));
 984
 985         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
 986                 return -EACCES;
 987
 988         spin_lock(&obj->oo_guard);
 989         osd_inode_setattr(env, obj->oo_inode, attr);
 990         spin_unlock(&obj->oo_guard);
 991
 992         mark_inode_dirty(obj->oo_inode);
 993         return 0;
 994 }
 995
 996 static struct timespec *osd_inode_time(const struct lu_env *env,
 997                                        struct inode *inode, __u64 seconds)
 998 {
 999         struct osd_thread_info *oti = osd_oti_get(env);
1000         struct timespec        *t   = &oti->oti_time;
1001
1002         t->tv_sec  = seconds;
1003         t->tv_nsec = 0;
1004         *t = timespec_trunc(*t, get_sb_time_gran(inode->i_sb));
1005         return t;
1006 }
1007
1008 static void osd_inode_setattr(const struct lu_env *env,
1009                               struct inode *inode, const struct lu_attr *attr)
1010 {
1011         __u64 bits;
1012
1013         bits = attr->la_valid;
1014
1015         LASSERT(!(bits & LA_TYPE)); /* Huh? You want too much. */
1016
1017         if (bits & LA_ATIME)
1018                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
1019         if (bits & LA_CTIME)
1020                 inode->i_ctime  = *osd_inode_time(env, inode, attr->la_ctime);
1021         if (bits & LA_MTIME)
1022                 inode->i_mtime  = *osd_inode_time(env, inode, attr->la_mtime);
1023         if (bits & LA_SIZE) {
1024                 LDISKFS_I(inode)->i_disksize = attr->la_size;
1025                 i_size_write(inode, attr->la_size);
1026         }
1027         if (bits & LA_BLOCKS)
1028                 inode->i_blocks = attr->la_blocks;
1029         if (bits & LA_MODE)
1030                 inode->i_mode   = (inode->i_mode & S_IFMT) |
1031                         (attr->la_mode & ~S_IFMT);
1032         if (bits & LA_UID)
1033                 inode->i_uid    = attr->la_uid;
1034         if (bits & LA_GID)
1035                 inode->i_gid    = attr->la_gid;
1036         if (bits & LA_NLINK)
1037                 inode->i_nlink  = attr->la_nlink;
1038         if (bits & LA_RDEV)
1039                 inode->i_rdev   = attr->la_rdev;
1040
1041         if (bits & LA_FLAGS) {
1042                 struct ldiskfs_inode_info *li = LDISKFS_I(inode);
1043
1044                 li->i_flags = (li->i_flags & ~LDISKFS_FL_USER_MODIFIABLE) |
1045                         (attr->la_flags & LDISKFS_FL_USER_MODIFIABLE);
1046         }
1047 }
1048
1049 /*
1050  * Object creation.
1051  *
1052  * XXX temporary solution.
1053  */
1054
1055 static int osd_create_pre(struct osd_thread_info *info, struct osd_object *obj,
1056                           struct lu_attr *attr, struct thandle *th)
1057 {
1058         return 0;
1059 }
1060
1061 static int osd_create_post(struct osd_thread_info *info, struct osd_object *obj,
1062                            struct lu_attr *attr, struct thandle *th)
1063 {
1064         LASSERT(obj->oo_inode != NULL);
1065
1066         osd_object_init0(obj);
1067         return 0;
1068 }
1069
1070 extern struct inode *ldiskfs_create_inode(handle_t *handle,
1071                                           struct inode * dir, int mode);
1072
1073 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
1074                       umode_t mode,
1075                       struct dt_allocation_hint *hint,
1076                       struct thandle *th)
1077 {
1078         int result;
1079         struct osd_device  *osd = osd_obj2dev(obj);
1080         struct osd_thandle *oth;
1081         struct inode       *parent;
1082         struct inode       *inode;
1083
1084         LASSERT(osd_invariant(obj));
1085         LASSERT(obj->oo_inode == NULL);
1086         LASSERT(osd->od_obj_area != NULL);
1087
1088         oth = container_of(th, struct osd_thandle, ot_super);
1089         LASSERT(oth->ot_handle->h_transaction != NULL);
1090
1091         if (hint && hint->dah_parent)
1092                 parent = osd_dt_obj(hint->dah_parent)->oo_inode;
1093         else
1094                 parent = osd->od_obj_area->d_inode;
1095         LASSERT(parent->i_op != NULL);
1096
1097         inode = ldiskfs_create_inode(oth->ot_handle, parent, mode);
1098         if (!IS_ERR(inode)) {
1099                 obj->oo_inode = inode;
1100                 result = 0;
1101         } else
1102                 result = PTR_ERR(inode);
1103         LASSERT(osd_invariant(obj));
1104         return result;
1105 }
1106
1107
1108 extern int iam_lvar_create(struct inode *obj, int keysize, int ptrsize,
1109                            int recsize, handle_t *handle);
1110
1111 enum {
1112         OSD_NAME_LEN = 255
1113 };
1114
1115 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
1116                      struct lu_attr *attr,
1117                      struct dt_allocation_hint *hint,
1118                      struct thandle *th)
1119 {
1120         int result;
1121         struct osd_thandle *oth;
1122
1123         LASSERT(S_ISDIR(attr->la_mode));
1124
1125         oth = container_of(th, struct osd_thandle, ot_super);
1126         LASSERT(oth->ot_handle->h_transaction != NULL);
1127         result = osd_mkfile(info, obj, (attr->la_mode &
1128                             (S_IFMT | S_IRWXUGO | S_ISVTX)), hint, th);
1129         if (result == 0) {
1130                 LASSERT(obj->oo_inode != NULL);
1131                 /*
1132                  * XXX uh-oh... call low-level iam function directly.
1133                  */
1134                 result = iam_lvar_create(obj->oo_inode, OSD_NAME_LEN, 4,
1135                                          sizeof (struct lu_fid_pack),
1136                                          oth->ot_handle);
1137         }
1138         return result;
1139 }
1140
1141 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
1142                      struct lu_attr *attr,
1143                      struct dt_allocation_hint *hint,
1144                      struct thandle *th)
1145 {
1146         LASSERT(S_ISREG(attr->la_mode));
1147         return osd_mkfile(info, obj, (attr->la_mode &
1148                                (S_IFMT | S_IRWXUGO | S_ISVTX)), hint, th);
1149 }
1150
1151 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
1152                      struct lu_attr *attr,
1153                      struct dt_allocation_hint *hint,
1154                      struct thandle *th)
1155 {
1156         LASSERT(S_ISLNK(attr->la_mode));
1157         return osd_mkfile(info, obj, (attr->la_mode &
1158                               (S_IFMT | S_IRWXUGO | S_ISVTX)), hint, th);
1159 }
1160
1161 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
1162                      struct lu_attr *attr,
1163                      struct dt_allocation_hint *hint,
1164                      struct thandle *th)
1165 {
1166         int result;
1167         struct osd_device *osd = osd_obj2dev(obj);
1168         struct inode      *dir;
1169         umode_t mode = attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX);
1170
1171         LASSERT(osd_invariant(obj));
1172         LASSERT(obj->oo_inode == NULL);
1173         LASSERT(osd->od_obj_area != NULL);
1174         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
1175                 S_ISFIFO(mode) || S_ISSOCK(mode));
1176
1177         dir = osd->od_obj_area->d_inode;
1178         LASSERT(dir->i_op != NULL);
1179
1180         result = osd_mkfile(info, obj, mode, hint, th);
1181         if (result == 0) {
1182                 LASSERT(obj->oo_inode != NULL);
1183                 init_special_inode(obj->oo_inode, mode, attr->la_rdev);
1184         }
1185         LASSERT(osd_invariant(obj));
1186         return result;
1187 }
1188
1189 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
1190                               struct lu_attr *,
1191                               struct dt_allocation_hint *hint,
1192                               struct thandle *);
1193
1194 static osd_obj_type_f osd_create_type_f(__u32 mode)
1195 {
1196         osd_obj_type_f result;
1197
1198         switch (mode) {
1199         case S_IFDIR:
1200                 result = osd_mkdir;
1201                 break;
1202         case S_IFREG:
1203                 result = osd_mkreg;
1204                 break;
1205         case S_IFLNK:
1206                 result = osd_mksym;
1207                 break;
1208         case S_IFCHR:
1209         case S_IFBLK:
1210         case S_IFIFO:
1211         case S_IFSOCK:
1212                 result = osd_mknod;
1213                 break;
1214         default:
1215                 LBUG();
1216                 break;
1217         }
1218         return result;
1219 }
1220
1221
1222 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
1223                         struct dt_object *parent, umode_t child_mode)
1224 {
1225         LASSERT(ah);
1226
1227         memset(ah, 0, sizeof(*ah));
1228         ah->dah_parent = parent;
1229         ah->dah_mode = child_mode;
1230 }
1231
1232
1233 /*
1234  * Concurrency: @dt is write locked.
1235  */
1236 static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
1237                              struct lu_attr *attr,
1238                              struct dt_allocation_hint *hint,
1239                              struct thandle *th)
1240 {
1241         const struct lu_fid    *fid  = lu_object_fid(&dt->do_lu);
1242         struct osd_object      *obj  = osd_dt_obj(dt);
1243         struct osd_device      *osd  = osd_obj2dev(obj);
1244         struct osd_thread_info *info = osd_oti_get(env);
1245         int result;
1246
1247         ENTRY;
1248
1249         LASSERT(osd_invariant(obj));
1250         LASSERT(!dt_object_exists(dt));
1251         LASSERT(osd_write_locked(env, obj));
1252         LASSERT(th != NULL);
1253
1254         /*
1255          * XXX missing: Quote handling.
1256          */
1257
1258         result = osd_create_pre(info, obj, attr, th);
1259         if (result == 0) {
1260                 result = osd_create_type_f(attr->la_mode & S_IFMT)(info, obj,
1261                                                                 attr, hint, th);
1262                 if (result == 0)
1263                         result = osd_create_post(info, obj, attr, th);
1264         }
1265         if (result == 0) {
1266                 struct osd_inode_id *id = &info->oti_id;
1267
1268                 LASSERT(obj->oo_inode != NULL);
1269
1270                 id->oii_ino = obj->oo_inode->i_ino;
1271                 id->oii_gen = obj->oo_inode->i_generation;
1272
1273                 result = osd_oi_insert(info, &osd->od_oi, fid, id, th);
1274         }
1275
1276         LASSERT(ergo(result == 0, dt_object_exists(dt)));
1277         LASSERT(osd_invariant(obj));
1278         RETURN(result);
1279 }
1280
1281 /*
1282  * Concurrency: @dt is write locked.
1283  */
1284 static void osd_object_ref_add(const struct lu_env *env,
1285                                struct dt_object *dt,
1286                                struct thandle *th)
1287 {
1288         struct osd_object *obj = osd_dt_obj(dt);
1289         struct inode *inode = obj->oo_inode;
1290
1291         LASSERT(osd_invariant(obj));
1292         LASSERT(dt_object_exists(dt));
1293         LASSERT(osd_write_locked(env, obj));
1294         LASSERT(th != NULL);
1295
1296         spin_lock(&obj->oo_guard);
1297         LASSERT(inode->i_nlink < LDISKFS_LINK_MAX);
1298         inode->i_nlink++;
1299         spin_unlock(&obj->oo_guard);
1300         mark_inode_dirty(inode);
1301         LASSERT(osd_invariant(obj));
1302 }
1303
1304 /*
1305  * Concurrency: @dt is write locked.
1306  */
1307 static void osd_object_ref_del(const struct lu_env *env,
1308                                struct dt_object *dt,
1309                                struct thandle *th)
1310 {
1311         struct osd_object *obj = osd_dt_obj(dt);
1312         struct inode *inode = obj->oo_inode;
1313
1314         LASSERT(osd_invariant(obj));
1315         LASSERT(dt_object_exists(dt));
1316         LASSERT(osd_write_locked(env, obj));
1317         LASSERT(th != NULL);
1318
1319         spin_lock(&obj->oo_guard);
1320         LASSERT(inode->i_nlink > 0);
1321         inode->i_nlink--;
1322         spin_unlock(&obj->oo_guard);
1323         mark_inode_dirty(inode);
1324         LASSERT(osd_invariant(obj));
1325 }
1326
1327 /*
1328  * Concurrency: @dt is read locked.
1329  */
1330 static int osd_xattr_get(const struct lu_env *env,
1331                          struct dt_object *dt,
1332                          struct lu_buf *buf,
1333                          const char *name,
1334                          struct lustre_capa *capa)
1335 {
1336         struct osd_object      *obj    = osd_dt_obj(dt);
1337         struct inode           *inode  = obj->oo_inode;
1338         struct osd_thread_info *info   = osd_oti_get(env);
1339         struct dentry          *dentry = &info->oti_dentry;
1340
1341         LASSERT(dt_object_exists(dt));
1342         LASSERT(inode->i_op != NULL && inode->i_op->getxattr != NULL);
1343         LASSERT(osd_read_locked(env, obj) || osd_write_locked(env, obj));
1344
1345         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
1346                 return -EACCES;
1347
1348         dentry->d_inode = inode;
1349         return inode->i_op->getxattr(dentry, name, buf->lb_buf, buf->lb_len);
1350 }
1351
1352 /*
1353  * Concurrency: @dt is write locked.
1354  */
1355 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
1356                          const struct lu_buf *buf, const char *name, int fl,
1357                          struct thandle *handle, struct lustre_capa *capa)
1358 {
1359         struct osd_object      *obj    = osd_dt_obj(dt);
1360         struct inode           *inode  = obj->oo_inode;
1361         struct osd_thread_info *info   = osd_oti_get(env);
1362         struct dentry          *dentry = &info->oti_dentry;
1363         struct timespec        *t      = &info->oti_time;
1364         int                     fs_flags = 0, rc;
1365
1366         LASSERT(dt_object_exists(dt));
1367         LASSERT(inode->i_op != NULL && inode->i_op->setxattr != NULL);
1368         LASSERT(osd_write_locked(env, obj));
1369         LASSERT(handle != NULL);
1370
1371         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
1372                 return -EACCES;
1373
1374         if (fl & LU_XATTR_REPLACE)
1375                 fs_flags |= XATTR_REPLACE;
1376
1377         if (fl & LU_XATTR_CREATE)
1378                 fs_flags |= XATTR_CREATE;
1379
1380         dentry->d_inode = inode;
1381         *t = inode->i_ctime;
1382         rc = inode->i_op->setxattr(dentry, name,
1383                                    buf->lb_buf, buf->lb_len, fs_flags);
1384         if (likely(rc == 0)) {
1385                 /* ctime should not be updated with server-side time. */
1386                 spin_lock(&obj->oo_guard);
1387                 inode->i_ctime = *t;
1388                 spin_unlock(&obj->oo_guard);
1389                 mark_inode_dirty(inode);
1390         }
1391         return rc;
1392 }
1393
1394 /*
1395  * Concurrency: @dt is read locked.
1396  */
1397 static int osd_xattr_list(const struct lu_env *env,
1398                           struct dt_object *dt,
1399                           struct lu_buf *buf,
1400                           struct lustre_capa *capa)
1401 {
1402         struct osd_object      *obj    = osd_dt_obj(dt);
1403         struct inode           *inode  = obj->oo_inode;
1404         struct osd_thread_info *info   = osd_oti_get(env);
1405         struct dentry          *dentry = &info->oti_dentry;
1406
1407         LASSERT(dt_object_exists(dt));
1408         LASSERT(inode->i_op != NULL && inode->i_op->listxattr != NULL);
1409         LASSERT(osd_read_locked(env, obj) || osd_write_locked(env, obj));
1410
1411         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
1412                 return -EACCES;
1413
1414         dentry->d_inode = inode;
1415         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
1416 }
1417
1418 /*
1419  * Concurrency: @dt is write locked.
1420  */
1421 static int osd_xattr_del(const struct lu_env *env,
1422                          struct dt_object *dt,
1423                          const char *name,
1424                          struct thandle *handle,
1425                          struct lustre_capa *capa)
1426 {
1427         struct osd_object      *obj    = osd_dt_obj(dt);
1428         struct inode           *inode  = obj->oo_inode;
1429         struct osd_thread_info *info   = osd_oti_get(env);
1430         struct dentry          *dentry = &info->oti_dentry;
1431         struct timespec        *t      = &info->oti_time;
1432         int                     rc;
1433
1434         LASSERT(dt_object_exists(dt));
1435         LASSERT(inode->i_op != NULL && inode->i_op->removexattr != NULL);
1436         LASSERT(osd_write_locked(env, obj));
1437         LASSERT(handle != NULL);
1438
1439         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
1440                 return -EACCES;
1441
1442         dentry->d_inode = inode;
1443         *t = inode->i_ctime;
1444         rc = inode->i_op->removexattr(dentry, name);
1445         if (likely(rc == 0)) {
1446                 /* ctime should not be updated with server-side time. */
1447                 spin_lock(&obj->oo_guard);
1448                 inode->i_ctime = *t;
1449                 spin_unlock(&obj->oo_guard);
1450                 mark_inode_dirty(inode);
1451         }
1452         return rc;
1453 }
1454
1455 static struct obd_capa *osd_capa_get(const struct lu_env *env,
1456                                      struct dt_object *dt,
1457                                      struct lustre_capa *old,
1458                                      __u64 opc)
1459 {
1460         struct osd_thread_info *info = osd_oti_get(env);
1461         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
1462         struct osd_object *obj = osd_dt_obj(dt);
1463         struct osd_device *dev = osd_obj2dev(obj);
1464         struct lustre_capa_key *key = &info->oti_capa_key;
1465         struct lustre_capa *capa = &info->oti_capa;
1466         struct obd_capa *oc;
1467         int rc;
1468         ENTRY;
1469
1470         if (!dev->od_fl_capa)
1471                 RETURN(ERR_PTR(-ENOENT));
1472
1473         LASSERT(dt_object_exists(dt));
1474         LASSERT(osd_invariant(obj));
1475
1476         /* renewal sanity check */
1477         if (old && osd_object_auth(env, dt, old, opc))
1478                 RETURN(ERR_PTR(-EACCES));
1479
1480         capa->lc_fid = *fid;
1481         capa->lc_opc = opc;
1482         capa->lc_uid = 0;
1483         capa->lc_flags = dev->od_capa_alg << 24;
1484         capa->lc_timeout = dev->od_capa_timeout;
1485         capa->lc_expiry = 0;
1486
1487         oc = capa_lookup(dev->od_capa_hash, capa, 1);
1488         if (oc) {
1489                 LASSERT(!capa_is_expired(oc));
1490                 RETURN(oc);
1491         }
1492
1493         spin_lock(&capa_lock);
1494         *key = dev->od_capa_keys[1];
1495         spin_unlock(&capa_lock);
1496
1497         capa->lc_keyid = key->lk_keyid;
1498         capa->lc_expiry = cfs_time_current_sec() + dev->od_capa_timeout;
1499
1500         rc = capa_hmac(capa->lc_hmac, capa, key->lk_key);
1501         if (rc) {
1502                 DEBUG_CAPA(D_ERROR, capa, "HMAC failed: %d for", rc);
1503                 RETURN(ERR_PTR(rc));
1504         }
1505
1506         oc = capa_add(dev->od_capa_hash, capa);
1507         RETURN(oc);
1508 }
1509
1510 static struct dt_object_operations osd_obj_ops = {
1511         .do_read_lock    = osd_object_read_lock,
1512         .do_write_lock   = osd_object_write_lock,
1513         .do_read_unlock  = osd_object_read_unlock,
1514         .do_write_unlock = osd_object_write_unlock,
1515         .do_attr_get     = osd_attr_get,
1516         .do_attr_set     = osd_attr_set,
1517         .do_ah_init      = osd_ah_init,
1518         .do_create       = osd_object_create,
1519         .do_index_try    = osd_index_try,
1520         .do_ref_add      = osd_object_ref_add,
1521         .do_ref_del      = osd_object_ref_del,
1522         .do_xattr_get    = osd_xattr_get,
1523         .do_xattr_set    = osd_xattr_set,
1524         .do_xattr_del    = osd_xattr_del,
1525         .do_xattr_list   = osd_xattr_list,
1526         .do_capa_get     = osd_capa_get,
1527 };
1528
1529 /*
1530  * Body operations.
1531  */
1532
1533 /*
1534  * XXX: Another layering violation for now.
1535  *
1536  * We don't want to use ->f_op->read methods, because generic file write
1537  *
1538  *         - serializes on ->i_sem, and
1539  *
1540  *         - does a lot of extra work like balance_dirty_pages(),
1541  *
1542  * which doesn't work for globally shared files like /last-received.
1543  */
1544 int fsfilt_ldiskfs_read(struct inode *inode, void *buf, int size, loff_t *offs);
1545 int fsfilt_ldiskfs_write_handle(struct inode *inode, void *buf, int bufsize,
1546                                 loff_t *offs, handle_t *handle);
1547
1548 static ssize_t osd_read(const struct lu_env *env, struct dt_object *dt,
1549                         struct lu_buf *buf, loff_t *pos,
1550                         struct lustre_capa *capa)
1551 {
1552         struct inode *inode = osd_dt_obj(dt)->oo_inode;
1553
1554         if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_READ))
1555                 RETURN(-EACCES);
1556
1557         return fsfilt_ldiskfs_read(inode, buf->lb_buf, buf->lb_len, pos);
1558 }
1559
1560 static ssize_t osd_write(const struct lu_env *env, struct dt_object *dt,
1561                          const struct lu_buf *buf, loff_t *pos,
1562                          struct thandle *handle, struct lustre_capa *capa)
1563 {
1564         struct inode       *inode = osd_dt_obj(dt)->oo_inode;
1565         struct osd_thandle *oh;
1566         ssize_t             result;
1567
1568         LASSERT(handle != NULL);
1569
1570         if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_WRITE))
1571                 RETURN(-EACCES);
1572
1573         oh = container_of(handle, struct osd_thandle, ot_super);
1574         LASSERT(oh->ot_handle->h_transaction != NULL);
1575         result = fsfilt_ldiskfs_write_handle(inode, buf->lb_buf, buf->lb_len,
1576                                              pos, oh->ot_handle);
1577         if (result == 0)
1578                 result = buf->lb_len;
1579         return result;
1580 }
1581
1582 static struct dt_body_operations osd_body_ops = {
1583         .dbo_read  = osd_read,
1584         .dbo_write = osd_write
1585 };
1586
1587 /*
1588  * Index operations.
1589  */
1590
1591 static int osd_object_is_root(const struct osd_object *obj)
1592 {
1593         return osd_sb(osd_obj2dev(obj))->s_root->d_inode == obj->oo_inode;
1594 }
1595
1596 static int osd_index_probe(const struct lu_env *env, struct osd_object *o,
1597                            const struct dt_index_features *feat)
1598 {
1599         struct iam_descr *descr;
1600
1601         if (osd_object_is_root(o))
1602                 return feat == &dt_directory_features;
1603
1604         LASSERT(o->oo_dir != NULL);
1605
1606         descr = o->oo_dir->od_container.ic_descr;
1607         if (feat == &dt_directory_features)
1608                 return descr == &iam_htree_compat_param ||
1609                         (descr->id_rec_size == sizeof(struct lu_fid_pack) &&
1610                          1 /*
1611                             * XXX check that index looks like directory.
1612                             */
1613                                 );
1614         else
1615                 return
1616                         feat->dif_keysize_min <= descr->id_key_size &&
1617                         descr->id_key_size <= feat->dif_keysize_max &&
1618                         feat->dif_recsize_min <= descr->id_rec_size &&
1619                         descr->id_rec_size <= feat->dif_recsize_max &&
1620                         !(feat->dif_flags & (DT_IND_VARKEY |
1621                                              DT_IND_VARREC | DT_IND_NONUNQ)) &&
1622                         ergo(feat->dif_flags & DT_IND_UPDATE,
1623                              1 /* XXX check that object (and file system) is
1624                                 * writable */);
1625 }
1626
1627 static int osd_container_init(const struct lu_env *env,
1628                               struct osd_object *obj,
1629                               struct osd_directory *dir)
1630 {
1631         int result;
1632         struct iam_container *bag;
1633
1634         bag    = &dir->od_container;
1635         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
1636         if (result == 0) {
1637                 result = iam_container_setup(bag);
1638                 if (result == 0)
1639                         obj->oo_dt.do_index_ops = &osd_index_ops;
1640                 else
1641                         iam_container_fini(bag);
1642         }
1643         return result;
1644 }
1645
1646 /*
1647  * Concurrency: no external locking is necessary.
1648  */
1649 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
1650                          const struct dt_index_features *feat)
1651 {
1652         int result;
1653         struct osd_object *obj = osd_dt_obj(dt);
1654
1655         LASSERT(osd_invariant(obj));
1656         LASSERT(dt_object_exists(dt));
1657
1658         if (osd_object_is_root(obj)) {
1659                 dt->do_index_ops = &osd_index_compat_ops;
1660                 result = 0;
1661         } else if (!osd_has_index(obj)) {
1662                 struct osd_directory *dir;
1663
1664                 OBD_ALLOC_PTR(dir);
1665                 if (dir != NULL) {
1666                         sema_init(&dir->od_sem, 1);
1667
1668                         spin_lock(&obj->oo_guard);
1669                         if (obj->oo_dir == NULL)
1670                                 obj->oo_dir = dir;
1671                         else
1672                                 /*
1673                                  * Concurrent thread allocated container data.
1674                                  */
1675                                 OBD_FREE_PTR(dir);
1676                         spin_unlock(&obj->oo_guard);
1677                         /*
1678                          * Now, that we have container data, serialize its
1679                          * initialization.
1680                          */
1681                         down(&obj->oo_dir->od_sem);
1682                         /*
1683                          * recheck under lock.
1684                          */
1685                         if (!osd_has_index(obj))
1686                                 result = osd_container_init(env, obj, dir);
1687                         else
1688                                 result = 0;
1689                         up(&obj->oo_dir->od_sem);
1690                 } else
1691                         result = -ENOMEM;
1692         } else
1693                 result = 0;
1694
1695         if (result == 0) {
1696                 if (!osd_index_probe(env, obj, feat))
1697                         result = -ENOTDIR;
1698         }
1699         LASSERT(osd_invariant(obj));
1700
1701         return result;
1702 }
1703
1704 static int osd_index_delete(const struct lu_env *env, struct dt_object *dt,
1705                             const struct dt_key *key, struct thandle *handle,
1706                             struct lustre_capa *capa)
1707 {
1708         struct osd_object     *obj = osd_dt_obj(dt);
1709         struct osd_thandle    *oh;
1710         struct iam_path_descr *ipd;
1711         struct iam_container  *bag = &obj->oo_dir->od_container;
1712         int rc;
1713
1714         ENTRY;
1715
1716         LASSERT(osd_invariant(obj));
1717         LASSERT(dt_object_exists(dt));
1718         LASSERT(bag->ic_object == obj->oo_inode);
1719         LASSERT(handle != NULL);
1720
1721         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
1722                 RETURN(-EACCES);
1723
1724         ipd = osd_ipd_get(env, bag);
1725         if (unlikely(ipd == NULL))
1726                 RETURN(-ENOMEM);
1727
1728         oh = container_of0(handle, struct osd_thandle, ot_super);
1729         LASSERT(oh->ot_handle != NULL);
1730         LASSERT(oh->ot_handle->h_transaction != NULL);
1731
1732         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
1733         osd_ipd_put(env, bag, ipd);
1734         LASSERT(osd_invariant(obj));
1735         RETURN(rc);
1736 }
1737
1738 static int osd_index_lookup(const struct lu_env *env, struct dt_object *dt,
1739                             struct dt_rec *rec, const struct dt_key *key,
1740                             struct lustre_capa *capa)
1741 {
1742         struct osd_object     *obj = osd_dt_obj(dt);
1743         struct iam_path_descr *ipd;
1744         struct iam_container  *bag = &obj->oo_dir->od_container;
1745         int rc;
1746
1747         ENTRY;
1748
1749         LASSERT(osd_invariant(obj));
1750         LASSERT(dt_object_exists(dt));
1751         LASSERT(bag->ic_object == obj->oo_inode);
1752
1753         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_LOOKUP))
1754                 return -EACCES;
1755
1756         ipd = osd_ipd_get(env, bag);
1757         if (unlikely(ipd == NULL))
1758                 RETURN(-ENOMEM);
1759
1760         rc = iam_lookup(bag, (const struct iam_key *)key,
1761                         (struct iam_rec *)rec, ipd);
1762         osd_ipd_put(env, bag, ipd);
1763         LASSERT(osd_invariant(obj));
1764
1765         RETURN(rc);
1766 }
1767
1768 static int osd_index_insert(const struct lu_env *env, struct dt_object *dt,
1769                             const struct dt_rec *rec, const struct dt_key *key,
1770                             struct thandle *th, struct lustre_capa *capa)
1771 {
1772         struct osd_object     *obj = osd_dt_obj(dt);
1773         struct iam_path_descr *ipd;
1774         struct osd_thandle    *oh;
1775         struct iam_container  *bag = &obj->oo_dir->od_container;
1776         int rc;
1777
1778         ENTRY;
1779
1780         LASSERT(osd_invariant(obj));
1781         LASSERT(dt_object_exists(dt));
1782         LASSERT(bag->ic_object == obj->oo_inode);
1783         LASSERT(th != NULL);
1784
1785         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
1786                 return -EACCES;
1787
1788         ipd = osd_ipd_get(env, bag);
1789         if (unlikely(ipd == NULL))
1790                 RETURN(-ENOMEM);
1791
1792         oh = container_of0(th, struct osd_thandle, ot_super);
1793         LASSERT(oh->ot_handle != NULL);
1794         LASSERT(oh->ot_handle->h_transaction != NULL);
1795         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
1796                         (struct iam_rec *)rec, ipd);
1797         osd_ipd_put(env, bag, ipd);
1798         LASSERT(osd_invariant(obj));
1799         RETURN(rc);
1800 }
1801
1802 /*
1803  * Iterator operations.
1804  */
1805 struct osd_it {
1806         struct osd_object     *oi_obj;
1807         struct iam_path_descr *oi_ipd;
1808         struct iam_iterator    oi_it;
1809 };
1810
1811 static struct dt_it *osd_it_init(const struct lu_env *env,
1812                                  struct dt_object *dt, int writable,
1813                                  struct lustre_capa *capa)
1814 {
1815         struct osd_it         *it;
1816         struct osd_object     *obj = osd_dt_obj(dt);
1817         struct lu_object      *lo  = &dt->do_lu;
1818         struct iam_path_descr *ipd;
1819         struct iam_container  *bag = &obj->oo_dir->od_container;
1820         __u32                  flags;
1821
1822         LASSERT(lu_object_exists(lo));
1823
1824         if (osd_object_auth(env, dt, capa, writable ? CAPA_OPC_BODY_WRITE :
1825                             CAPA_OPC_BODY_READ))
1826                 return ERR_PTR(-EACCES);
1827
1828         flags = writable ? IAM_IT_MOVE|IAM_IT_WRITE : IAM_IT_MOVE;
1829         OBD_ALLOC_PTR(it);
1830         if (it != NULL) {
1831                 /*
1832                  * XXX: as ipd is allocated within osd_thread_info, assignment
1833                  * below implies that iterator usage is confined within single
1834                  * environment.
1835                  */
1836                 ipd = osd_ipd_get(env, bag);
1837                 if (likely(ipd != NULL)) {
1838                         it->oi_obj = obj;
1839                         it->oi_ipd = ipd;
1840                         lu_object_get(lo);
1841                         iam_it_init(&it->oi_it, bag, flags, ipd);
1842                         return (struct dt_it *)it;
1843                 } else
1844                         OBD_FREE_PTR(it);
1845         }
1846         return ERR_PTR(-ENOMEM);
1847 }
1848
1849 static void osd_it_fini(const struct lu_env *env, struct dt_it *di)
1850 {
1851         struct osd_it     *it = (struct osd_it *)di;
1852         struct osd_object *obj = it->oi_obj;
1853
1854         iam_it_fini(&it->oi_it);
1855         osd_ipd_put(env, &obj->oo_dir->od_container, it->oi_ipd);
1856         lu_object_put(env, &obj->oo_dt.do_lu);
1857         OBD_FREE_PTR(it);
1858 }
1859
1860 static int osd_it_get(const struct lu_env *env,
1861                       struct dt_it *di, const struct dt_key *key)
1862 {
1863         struct osd_it *it = (struct osd_it *)di;
1864
1865         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
1866 }
1867
1868 static void osd_it_put(const struct lu_env *env, struct dt_it *di)
1869 {
1870         struct osd_it *it = (struct osd_it *)di;
1871
1872         iam_it_put(&it->oi_it);
1873 }
1874
1875 static int osd_it_next(const struct lu_env *env, struct dt_it *di)
1876 {
1877         struct osd_it *it = (struct osd_it *)di;
1878
1879         return iam_it_next(&it->oi_it);
1880 }
1881
1882 static int osd_it_del(const struct lu_env *env, struct dt_it *di,
1883                       struct thandle *th)
1884 {
1885         struct osd_it      *it = (struct osd_it *)di;
1886         struct osd_thandle *oh;
1887
1888         LASSERT(th != NULL);
1889
1890         oh = container_of0(th, struct osd_thandle, ot_super);
1891         LASSERT(oh->ot_handle != NULL);
1892         LASSERT(oh->ot_handle->h_transaction != NULL);
1893
1894         return iam_it_rec_delete(oh->ot_handle, &it->oi_it);
1895 }
1896
1897 static struct dt_key *osd_it_key(const struct lu_env *env,
1898                                  const struct dt_it *di)
1899 {
1900         struct osd_it *it = (struct osd_it *)di;
1901
1902         return (struct dt_key *)iam_it_key_get(&it->oi_it);
1903 }
1904
1905 static int osd_it_key_size(const struct lu_env *env, const struct dt_it *di)
1906 {
1907         struct osd_it *it = (struct osd_it *)di;
1908
1909         return iam_it_key_size(&it->oi_it);
1910 }
1911
1912 static struct dt_rec *osd_it_rec(const struct lu_env *env,
1913                                  const struct dt_it *di)
1914 {
1915         struct osd_it *it = (struct osd_it *)di;
1916
1917         return (struct dt_rec *)iam_it_rec_get(&it->oi_it);
1918 }
1919
1920 static __u64 osd_it_store(const struct lu_env *env, const struct dt_it *di)
1921 {
1922         struct osd_it *it = (struct osd_it *)di;
1923
1924         return iam_it_store(&it->oi_it);
1925 }
1926
1927 static int osd_it_load(const struct lu_env *env,
1928                        const struct dt_it *di, __u64 hash)
1929 {
1930         struct osd_it *it = (struct osd_it *)di;
1931
1932         return iam_it_load(&it->oi_it, hash);
1933 }
1934
1935 static struct dt_index_operations osd_index_ops = {
1936         .dio_lookup = osd_index_lookup,
1937         .dio_insert = osd_index_insert,
1938         .dio_delete = osd_index_delete,
1939         .dio_it     = {
1940                 .init     = osd_it_init,
1941                 .fini     = osd_it_fini,
1942                 .get      = osd_it_get,
1943                 .put      = osd_it_put,
1944                 .del      = osd_it_del,
1945                 .next     = osd_it_next,
1946                 .key      = osd_it_key,
1947                 .key_size = osd_it_key_size,
1948                 .rec      = osd_it_rec,
1949                 .store    = osd_it_store,
1950                 .load     = osd_it_load
1951         }
1952 };
1953
1954 static int osd_index_compat_delete(const struct lu_env *env,
1955                                    struct dt_object *dt,
1956                                    const struct dt_key *key,
1957                                    struct thandle *handle,
1958                                    struct lustre_capa *capa)
1959 {
1960         struct osd_object *obj = osd_dt_obj(dt);
1961
1962         LASSERT(handle != NULL);
1963         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
1964         ENTRY;
1965
1966 #if 0
1967         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
1968                 RETURN(-EACCES);
1969 #endif
1970
1971         RETURN(-EOPNOTSUPP);
1972 }
1973
1974 /*
1975  * Compatibility index operations.
1976  */
1977
1978
1979 static void osd_build_pack(const struct lu_env *env, struct osd_device *osd,
1980                            struct dentry *dentry, struct lu_fid_pack *pack)
1981 {
1982         struct inode  *inode = dentry->d_inode;
1983         struct lu_fid *fid   = &osd_oti_get(env)->oti_fid;
1984
1985         lu_igif_build(fid, inode->i_ino, inode->i_generation);
1986         fid_cpu_to_be(fid, fid);
1987         pack->fp_len = sizeof *fid + 1;
1988         memcpy(pack->fp_area, fid, sizeof *fid);
1989 }
1990
1991 static int osd_index_compat_lookup(const struct lu_env *env,
1992                                    struct dt_object *dt,
1993                                    struct dt_rec *rec, const struct dt_key *key,
1994                                    struct lustre_capa *capa)
1995 {
1996         struct osd_object *obj = osd_dt_obj(dt);
1997
1998         struct osd_device      *osd  = osd_obj2dev(obj);
1999         struct osd_thread_info *info = osd_oti_get(env);
2000         struct inode           *dir;
2001
2002         int result;
2003
2004         /*
2005          * XXX temporary solution.
2006          */
2007         struct dentry *dentry;
2008         struct dentry *parent;
2009
2010         LASSERT(osd_invariant(obj));
2011         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
2012         LASSERT(osd_has_index(obj));
2013
2014         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_LOOKUP))
2015                 return -EACCES;
2016
2017         info->oti_str.name = (const char *)key;
2018         info->oti_str.len  = strlen((const char *)key);
2019
2020         dir = obj->oo_inode;
2021         LASSERT(dir->i_op != NULL && dir->i_op->lookup != NULL);
2022
2023         parent = d_alloc_root(dir);
2024         if (parent == NULL)
2025                 return -ENOMEM;
2026         igrab(dir);
2027         dentry = d_alloc(parent, &info->oti_str);
2028         if (dentry != NULL) {
2029                 struct dentry *d;
2030
2031                 /*
2032                  * XXX passing NULL for nameidata should work for
2033                  * ext3/ldiskfs.
2034                  */
2035                 d = dir->i_op->lookup(dir, dentry, NULL);
2036                 if (d == NULL) {
2037                         /*
2038                          * normal case, result is in @dentry.
2039                          */
2040                         if (dentry->d_inode != NULL) {
2041                                 osd_build_pack(env, osd, dentry,
2042                                                (struct lu_fid_pack *)rec);
2043                                 result = 0;
2044                         } else
2045                                 result = -ENOENT;
2046                  } else {
2047                         /* What? Disconnected alias? Ppheeeww... */
2048                         CERROR("Aliasing where not expected\n");
2049                         result = -EIO;
2050                         dput(d);
2051                 }
2052                 dput(dentry);
2053         } else
2054                 result = -ENOMEM;
2055         dput(parent);
2056         LASSERT(osd_invariant(obj));
2057         return result;
2058 }
2059
2060 static int osd_add_rec(struct osd_thread_info *info, struct osd_device *dev,
2061                        struct inode *dir, struct inode *inode, const char *name)
2062 {
2063         struct dentry *old;
2064         struct dentry *new;
2065         struct dentry *parent;
2066
2067         int result;
2068
2069         info->oti_str.name = name;
2070         info->oti_str.len  = strlen(name);
2071
2072         LASSERT(atomic_read(&dir->i_count) > 0);
2073         result = -ENOMEM;
2074         old = d_alloc(dev->od_obj_area, &info->oti_str);
2075         if (old != NULL) {
2076                 d_instantiate(old, inode);
2077                 igrab(inode);
2078                 LASSERT(atomic_read(&dir->i_count) > 0);
2079                 parent = d_alloc_root(dir);
2080                 if (parent != NULL) {
2081                         igrab(dir);
2082                         LASSERT(atomic_read(&dir->i_count) > 1);
2083                         new = d_alloc(parent, &info->oti_str);
2084                         LASSERT(atomic_read(&dir->i_count) > 1);
2085                         if (new != NULL) {
2086                                 LASSERT(atomic_read(&dir->i_count) > 1);
2087                                 result = dir->i_op->link(old, dir, new);
2088                                 LASSERT(atomic_read(&dir->i_count) > 1);
2089                                 dput(new);
2090                                 LASSERT(atomic_read(&dir->i_count) > 1);
2091                         }
2092                         LASSERT(atomic_read(&dir->i_count) > 1);
2093                         dput(parent);
2094                         LASSERT(atomic_read(&dir->i_count) > 0);
2095                 }
2096                 dput(old);
2097         }
2098         LASSERT(atomic_read(&dir->i_count) > 0);
2099         return result;
2100 }
2101
2102
2103 /*
2104  * XXX Temporary stuff.
2105  */
2106 static int osd_index_compat_insert(const struct lu_env *env,
2107                                    struct dt_object *dt,
2108                                    const struct dt_rec *rec,
2109                                    const struct dt_key *key, struct thandle *th,
2110                                    struct lustre_capa *capa)
2111 {
2112         struct osd_object     *obj = osd_dt_obj(dt);
2113
2114         const char          *name = (const char *)key;
2115
2116         struct lu_device    *ludev = dt->do_lu.lo_dev;
2117         struct lu_object    *luch;
2118
2119         struct osd_thread_info   *info = osd_oti_get(env);
2120         const struct lu_fid_pack *pack  = (const struct lu_fid_pack *)rec;
2121         struct lu_fid            *fid   = &osd_oti_get(env)->oti_fid;
2122
2123         int result;
2124
2125         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
2126         LASSERT(osd_invariant(obj));
2127         LASSERT(th != NULL);
2128
2129         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
2130                 return -EACCES;
2131
2132         result = fid_unpack(pack, fid);
2133         if (result != 0)
2134                 return result;
2135
2136         luch = lu_object_find(env, ludev->ld_site, fid);
2137         if (!IS_ERR(luch)) {
2138                 if (lu_object_exists(luch)) {
2139                         struct osd_object *child;
2140
2141                         child = osd_obj(lu_object_locate(luch->lo_header,
2142                                                          ludev->ld_type));
2143                         if (child != NULL)
2144                                 result = osd_add_rec(info, osd_obj2dev(obj),
2145                                                      obj->oo_inode,
2146                                                      child->oo_inode, name);
2147                         else {
2148                                 CERROR("No osd slice.\n");
2149                                 result = -ENOENT;
2150                         }
2151                         LASSERT(osd_invariant(obj));
2152                         LASSERT(osd_invariant(child));
2153                 } else {
2154                         CERROR("Sorry.\n");
2155                         result = -ENOENT;
2156                 }
2157                 lu_object_put(env, luch);
2158         } else
2159                 result = PTR_ERR(luch);
2160         LASSERT(osd_invariant(obj));
2161         return result;
2162 }
2163
2164 static struct dt_index_operations osd_index_compat_ops = {
2165         .dio_lookup = osd_index_compat_lookup,
2166         .dio_insert = osd_index_compat_insert,
2167         .dio_delete = osd_index_compat_delete
2168 };
2169
2170 /* type constructor/destructor: osd_type_init, osd_type_fini */
2171 LU_TYPE_INIT_FINI(osd, &osd_key);
2172
2173 static struct lu_context_key osd_key = {
2174         .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD,
2175         .lct_init = osd_key_init,
2176         .lct_fini = osd_key_fini,
2177         .lct_exit = osd_key_exit
2178 };
2179
2180 static void *osd_key_init(const struct lu_context *ctx,
2181                           struct lu_context_key *key)
2182 {
2183         struct osd_thread_info *info;
2184
2185         OBD_ALLOC_PTR(info);
2186         if (info != NULL)
2187                 info->oti_env = container_of(ctx, struct lu_env, le_ctx);
2188         else
2189                 info = ERR_PTR(-ENOMEM);
2190         return info;
2191 }
2192
2193 /* context key destructor: osd_key_fini */
2194 LU_KEY_FINI(osd, struct osd_thread_info);
2195
2196 static void osd_key_exit(const struct lu_context *ctx,
2197                          struct lu_context_key *key, void *data)
2198 {
2199 #if OSD_COUNTERS
2200         struct osd_thread_info *info = data;
2201
2202         LASSERT(info->oti_r_locks == 0);
2203         LASSERT(info->oti_w_locks == 0);
2204         LASSERT(info->oti_txns    == 0);
2205 #endif
2206 }
2207
2208 static int osd_device_init(const struct lu_env *env, struct lu_device *d,
2209                            const char *name, struct lu_device *next)
2210 {
2211         int rc;
2212         /* context for commit hooks */
2213         rc = lu_context_init(&osd_dev(d)->od_env_for_commit.le_ctx,
2214                              LCT_MD_THREAD);
2215         if (rc == 0)
2216                 rc = osd_procfs_init(osd_dev(d), name);
2217         return rc;
2218 }
2219
2220 static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
2221 {
2222         struct osd_thread_info *info = osd_oti_get(env);
2223         ENTRY;
2224         if (o->od_obj_area != NULL) {
2225                 dput(o->od_obj_area);
2226                 o->od_obj_area = NULL;
2227         }
2228         osd_oi_fini(info, &o->od_oi);
2229
2230         RETURN(0);
2231 }
2232
2233 static int osd_mount(const struct lu_env *env,
2234                      struct osd_device *o, struct lustre_cfg *cfg)
2235 {
2236         struct lustre_mount_info *lmi;
2237         const char               *dev  = lustre_cfg_string(cfg, 0);
2238         struct osd_thread_info   *info = osd_oti_get(env);
2239         int result;
2240
2241         ENTRY;
2242
2243         if (o->od_mount != NULL) {
2244                 CERROR("Already mounted (%s)\n", dev);
2245                 RETURN(-EEXIST);
2246         }
2247
2248         /* get mount */
2249         lmi = server_get_mount(dev);
2250         if (lmi == NULL) {
2251                 CERROR("Cannot get mount info for %s!\n", dev);
2252                 RETURN(-EFAULT);
2253         }
2254
2255         LASSERT(lmi != NULL);
2256         /* save lustre_mount_info in dt_device */
2257         o->od_mount = lmi;
2258
2259         result = osd_oi_init(info, &o->od_oi, &o->od_dt_dev);
2260         if (result == 0) {
2261                 struct dentry *d;
2262
2263                 d = simple_mkdir(osd_sb(o)->s_root, "*OBJ-TEMP*", 0777, 1);
2264                 if (!IS_ERR(d)) {
2265                         o->od_obj_area = d;
2266                 } else
2267                         result = PTR_ERR(d);
2268         }
2269         if (result != 0)
2270                 osd_shutdown(env, o);
2271         RETURN(result);
2272 }
2273
2274 static struct lu_device *osd_device_fini(const struct lu_env *env,
2275                                          struct lu_device *d)
2276 {
2277         int rc;
2278         ENTRY;
2279
2280         shrink_dcache_sb(osd_sb(osd_dev(d)));
2281         osd_sync(env, lu2dt_dev(d));
2282
2283         rc = osd_procfs_fini(osd_dev(d));
2284         if (rc) {
2285                 CERROR("proc fini error %d \n", rc);
2286                 RETURN (ERR_PTR(rc));
2287         }
2288
2289         if (osd_dev(d)->od_mount)
2290                 server_put_mount(osd_dev(d)->od_mount->lmi_name,
2291                                  osd_dev(d)->od_mount->lmi_mnt);
2292         osd_dev(d)->od_mount = NULL;
2293
2294         lu_context_fini(&osd_dev(d)->od_env_for_commit.le_ctx);
2295         RETURN(NULL);
2296 }
2297
2298 static struct lu_device *osd_device_alloc(const struct lu_env *env,
2299                                           struct lu_device_type *t,
2300                                           struct lustre_cfg *cfg)
2301 {
2302         struct lu_device  *l;
2303         struct osd_device *o;
2304
2305         OBD_ALLOC_PTR(o);
2306         if (o != NULL) {
2307                 int result;
2308
2309                 result = dt_device_init(&o->od_dt_dev, t);
2310                 if (result == 0) {
2311                         l = osd2lu_dev(o);
2312                         l->ld_ops = &osd_lu_ops;
2313                         o->od_dt_dev.dd_ops = &osd_dt_ops;
2314                         spin_lock_init(&o->od_osfs_lock);
2315                         o->od_osfs_age = cfs_time_shift_64(-1000);
2316                         o->od_capa_hash = init_capa_hash();
2317                         if (o->od_capa_hash == NULL)
2318                                 l = ERR_PTR(-ENOMEM);
2319                 } else
2320                         l = ERR_PTR(result);
2321         } else
2322                 l = ERR_PTR(-ENOMEM);
2323         return l;
2324 }
2325
2326 static struct lu_device *osd_device_free(const struct lu_env *env,
2327                                          struct lu_device *d)
2328 {
2329         struct osd_device *o = osd_dev(d);
2330         ENTRY;
2331
2332         cleanup_capa_hash(o->od_capa_hash);
2333         dt_device_fini(&o->od_dt_dev);
2334         OBD_FREE_PTR(o);
2335         RETURN(NULL);
2336 }
2337
2338 static int osd_process_config(const struct lu_env *env,
2339                               struct lu_device *d, struct lustre_cfg *cfg)
2340 {
2341         struct osd_device *o = osd_dev(d);
2342         int err;
2343         ENTRY;
2344
2345         switch(cfg->lcfg_command) {
2346         case LCFG_SETUP:
2347                 err = osd_mount(env, o, cfg);
2348                 break;
2349         case LCFG_CLEANUP:
2350                 err = osd_shutdown(env, o);
2351                 break;
2352         default:
2353                 err = -ENOTTY;
2354         }
2355
2356         RETURN(err);
2357 }
2358 extern void ldiskfs_orphan_cleanup (struct super_block * sb,
2359                                     struct ldiskfs_super_block * es);
2360
2361 static int osd_recovery_complete(const struct lu_env *env,
2362                                  struct lu_device *d)
2363 {
2364         struct osd_device *o = osd_dev(d);
2365         ENTRY;
2366         /* TODO: orphans handling */
2367         ldiskfs_orphan_cleanup(osd_sb(o), LDISKFS_SB(osd_sb(o))->s_es);
2368         RETURN(0);
2369 }
2370
2371 static struct inode *osd_iget(struct osd_thread_info *info,
2372                               struct osd_device *dev,
2373                               const struct osd_inode_id *id)
2374 {
2375         struct inode *inode;
2376
2377         inode = iget(osd_sb(dev), id->oii_ino);
2378         if (inode == NULL) {
2379                 CERROR("no inode\n");
2380                 inode = ERR_PTR(-EACCES);
2381         } else if (is_bad_inode(inode)) {
2382                 CERROR("bad inode\n");
2383                 iput(inode);
2384                 inode = ERR_PTR(-ENOENT);
2385         } else if (inode->i_generation != id->oii_gen) {
2386                 CERROR("stale inode\n");
2387                 iput(inode);
2388                 inode = ERR_PTR(-ESTALE);
2389         }
2390
2391         return inode;
2392
2393 }
2394
2395 static int osd_fid_lookup(const struct lu_env *env,
2396                           struct osd_object *obj, const struct lu_fid *fid)
2397 {
2398         struct osd_thread_info *info;
2399         struct lu_device       *ldev = obj->oo_dt.do_lu.lo_dev;
2400         struct osd_device      *dev;
2401         struct osd_inode_id    *id;
2402         struct osd_oi          *oi;
2403         struct inode           *inode;
2404         int                     result;
2405
2406         LASSERT(osd_invariant(obj));
2407         LASSERT(obj->oo_inode == NULL);
2408         LASSERT(fid_is_sane(fid));
2409         /*
2410          * This assertion checks that osd layer sees only local
2411          * fids. Unfortunately it is somewhat expensive (does a
2412          * cache-lookup). Disabling it for production/acceptance-testing.
2413          */
2414         LASSERT(1 || fid_is_local(ldev->ld_site, fid));
2415
2416         ENTRY;
2417
2418         info = osd_oti_get(env);
2419         dev  = osd_dev(ldev);
2420         id   = &info->oti_id;
2421         oi   = &dev->od_oi;
2422
2423         if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
2424                 RETURN(-ENOENT);
2425
2426         result = osd_oi_lookup(info, oi, fid, id);
2427         if (result == 0) {
2428                 inode = osd_iget(info, dev, id);
2429                 if (!IS_ERR(inode)) {
2430                         obj->oo_inode = inode;
2431                         LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
2432                         result = 0;
2433                 } else
2434                         /*
2435                          * If fid wasn't found in oi, inode-less object is
2436                          * created, for which lu_object_exists() returns
2437                          * false. This is used in a (frequent) case when
2438                          * objects are created as locking anchors or
2439                          * place holders for objects yet to be created.
2440                          */
2441                         result = PTR_ERR(inode);
2442         } else if (result == -ENOENT)
2443                 result = 0;
2444         LASSERT(osd_invariant(obj));
2445         RETURN(result);
2446 }
2447
2448 static void osd_inode_getattr(const struct lu_env *env,
2449                               struct inode *inode, struct lu_attr *attr)
2450 {
2451         attr->la_valid      |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
2452                                LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
2453                                LA_FLAGS | LA_NLINK | LA_RDEV | LA_BLKSIZE;
2454
2455         attr->la_atime      = LTIME_S(inode->i_atime);
2456         attr->la_mtime      = LTIME_S(inode->i_mtime);
2457         attr->la_ctime      = LTIME_S(inode->i_ctime);
2458         attr->la_mode       = inode->i_mode;
2459         attr->la_size       = i_size_read(inode);
2460         attr->la_blocks     = inode->i_blocks;
2461         attr->la_uid        = inode->i_uid;
2462         attr->la_gid        = inode->i_gid;
2463         attr->la_flags      = LDISKFS_I(inode)->i_flags;
2464         attr->la_nlink      = inode->i_nlink;
2465         attr->la_rdev       = inode->i_rdev;
2466         attr->la_blksize    = ll_inode_blksize(inode);
2467         attr->la_blkbits    = inode->i_blkbits;
2468 }
2469
2470 /*
2471  * Helpers.
2472  */
2473
2474 static int lu_device_is_osd(const struct lu_device *d)
2475 {
2476         return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &osd_lu_ops);
2477 }
2478
2479 static struct osd_object *osd_obj(const struct lu_object *o)
2480 {
2481         LASSERT(lu_device_is_osd(o->lo_dev));
2482         return container_of0(o, struct osd_object, oo_dt.do_lu);
2483 }
2484
2485 static struct osd_device *osd_dt_dev(const struct dt_device *d)
2486 {
2487         LASSERT(lu_device_is_osd(&d->dd_lu_dev));
2488         return container_of0(d, struct osd_device, od_dt_dev);
2489 }
2490
2491 static struct osd_device *osd_dev(const struct lu_device *d)
2492 {
2493         LASSERT(lu_device_is_osd(d));
2494         return osd_dt_dev(container_of0(d, struct dt_device, dd_lu_dev));
2495 }
2496
2497 static struct osd_object *osd_dt_obj(const struct dt_object *d)
2498 {
2499         return osd_obj(&d->do_lu);
2500 }
2501
2502 static struct osd_device *osd_obj2dev(const struct osd_object *o)
2503 {
2504         return osd_dev(o->oo_dt.do_lu.lo_dev);
2505 }
2506
2507 static struct lu_device *osd2lu_dev(struct osd_device *osd)
2508 {
2509         return &osd->od_dt_dev.dd_lu_dev;
2510 }
2511
2512 static struct super_block *osd_sb(const struct osd_device *dev)
2513 {
2514         return dev->od_mount->lmi_mnt->mnt_sb;
2515 }
2516
2517 static journal_t *osd_journal(const struct osd_device *dev)
2518 {
2519         return LDISKFS_SB(osd_sb(dev))->s_journal;
2520 }
2521
2522 static int osd_has_index(const struct osd_object *obj)
2523 {
2524         return obj->oo_dt.do_index_ops != NULL;
2525 }
2526
2527 static int osd_object_invariant(const struct lu_object *l)
2528 {
2529         return osd_invariant(osd_obj(l));
2530 }
2531
2532 static struct lu_object_operations osd_lu_obj_ops = {
2533         .loo_object_init      = osd_object_init,
2534         .loo_object_delete    = osd_object_delete,
2535         .loo_object_release   = osd_object_release,
2536         .loo_object_free      = osd_object_free,
2537         .loo_object_print     = osd_object_print,
2538         .loo_object_invariant = osd_object_invariant
2539 };
2540
2541 static struct lu_device_operations osd_lu_ops = {
2542         .ldo_object_alloc      = osd_object_alloc,
2543         .ldo_process_config    = osd_process_config,
2544         .ldo_recovery_complete = osd_recovery_complete
2545 };
2546
2547 static struct lu_device_type_operations osd_device_type_ops = {
2548         .ldto_init = osd_type_init,
2549         .ldto_fini = osd_type_fini,
2550
2551         .ldto_device_alloc = osd_device_alloc,
2552         .ldto_device_free  = osd_device_free,
2553
2554         .ldto_device_init    = osd_device_init,
2555         .ldto_device_fini    = osd_device_fini
2556 };
2557
2558 static struct lu_device_type osd_device_type = {
2559         .ldt_tags     = LU_DEVICE_DT,
2560         .ldt_name     = LUSTRE_OSD_NAME,
2561         .ldt_ops      = &osd_device_type_ops,
2562         .ldt_ctx_tags = LCT_MD_THREAD|LCT_DT_THREAD
2563 };
2564
2565 /*
2566  * lprocfs legacy support.
2567  */
2568 static struct obd_ops osd_obd_device_ops = {
2569         .o_owner = THIS_MODULE
2570 };
2571
2572 static int __init osd_mod_init(void)
2573 {
2574         struct lprocfs_static_vars lvars;
2575
2576         lprocfs_osd_init_vars(&lvars);
2577         return class_register_type(&osd_obd_device_ops, NULL, lvars.module_vars,
2578                                    LUSTRE_OSD_NAME, &osd_device_type);
2579 }
2580
2581 static void __exit osd_mod_exit(void)
2582 {
2583         class_unregister_type(LUSTRE_OSD_NAME);
2584 }
2585
2586 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2587 MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_NAME")");
2588 MODULE_LICENSE("GPL");
2589
2590 cfs_module(osd, "0.0.2", osd_mod_init, osd_mod_exit);