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         if (inode->i_nlink < LDISKFS_LINK_MAX) {
1298                 inode->i_nlink ++;
1299                 spin_unlock(&obj->oo_guard);
1300                 mark_inode_dirty(inode);
1301         } else {
1302                 spin_unlock(&obj->oo_guard);
1303                 LU_OBJECT_DEBUG(D_ERROR, env, &dt->do_lu,
1304                                 "Overflowed nlink\n");
1305         }
1306         LASSERT(osd_invariant(obj));
1307 }
1308
1309 /*
1310  * Concurrency: @dt is write locked.
1311  */
1312 static void osd_object_ref_del(const struct lu_env *env,
1313                                struct dt_object *dt,
1314                                struct thandle *th)
1315 {
1316         struct osd_object *obj = osd_dt_obj(dt);
1317         struct inode *inode = obj->oo_inode;
1318
1319         LASSERT(osd_invariant(obj));
1320         LASSERT(dt_object_exists(dt));
1321         LASSERT(osd_write_locked(env, obj));
1322         LASSERT(th != NULL);
1323
1324         spin_lock(&obj->oo_guard);
1325         if (inode->i_nlink > 0) {
1326                 inode->i_nlink --;
1327                 spin_unlock(&obj->oo_guard);
1328                 mark_inode_dirty(inode);
1329         } else {
1330                 spin_unlock(&obj->oo_guard);
1331                 LU_OBJECT_DEBUG(D_ERROR, env, &dt->do_lu,
1332                                 "Underflowed nlink\n");
1333         }
1334         LASSERT(osd_invariant(obj));
1335 }
1336
1337 /*
1338  * Concurrency: @dt is read locked.
1339  */
1340 static int osd_xattr_get(const struct lu_env *env,
1341                          struct dt_object *dt,
1342                          struct lu_buf *buf,
1343                          const char *name,
1344                          struct lustre_capa *capa)
1345 {
1346         struct osd_object      *obj    = osd_dt_obj(dt);
1347         struct inode           *inode  = obj->oo_inode;
1348         struct osd_thread_info *info   = osd_oti_get(env);
1349         struct dentry          *dentry = &info->oti_dentry;
1350
1351         LASSERT(dt_object_exists(dt));
1352         LASSERT(inode->i_op != NULL && inode->i_op->getxattr != NULL);
1353         LASSERT(osd_read_locked(env, obj) || osd_write_locked(env, obj));
1354
1355         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
1356                 return -EACCES;
1357
1358         dentry->d_inode = inode;
1359         return inode->i_op->getxattr(dentry, name, buf->lb_buf, buf->lb_len);
1360 }
1361
1362 /*
1363  * Concurrency: @dt is write locked.
1364  */
1365 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
1366                          const struct lu_buf *buf, const char *name, int fl,
1367                          struct thandle *handle, struct lustre_capa *capa)
1368 {
1369         int fs_flags;
1370
1371         struct osd_object      *obj    = osd_dt_obj(dt);
1372         struct inode           *inode  = obj->oo_inode;
1373         struct osd_thread_info *info   = osd_oti_get(env);
1374         struct dentry          *dentry = &info->oti_dentry;
1375
1376         LASSERT(dt_object_exists(dt));
1377         LASSERT(inode->i_op != NULL && inode->i_op->setxattr != NULL);
1378         LASSERT(osd_write_locked(env, obj));
1379         LASSERT(handle != NULL);
1380
1381         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
1382                 return -EACCES;
1383
1384         dentry->d_inode = inode;
1385
1386         fs_flags = 0;
1387         if (fl & LU_XATTR_REPLACE)
1388                 fs_flags |= XATTR_REPLACE;
1389
1390         if (fl & LU_XATTR_CREATE)
1391                 fs_flags |= XATTR_CREATE;
1392
1393         return inode->i_op->setxattr(dentry, name,
1394                                      buf->lb_buf, buf->lb_len, fs_flags);
1395 }
1396
1397 /*
1398  * Concurrency: @dt is read locked.
1399  */
1400 static int osd_xattr_list(const struct lu_env *env,
1401                           struct dt_object *dt,
1402                           struct lu_buf *buf,
1403                           struct lustre_capa *capa)
1404 {
1405         struct osd_object      *obj    = osd_dt_obj(dt);
1406         struct inode           *inode  = obj->oo_inode;
1407         struct osd_thread_info *info   = osd_oti_get(env);
1408         struct dentry          *dentry = &info->oti_dentry;
1409
1410         LASSERT(dt_object_exists(dt));
1411         LASSERT(inode->i_op != NULL && inode->i_op->listxattr != NULL);
1412         LASSERT(osd_read_locked(env, obj) || osd_write_locked(env, obj));
1413
1414         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
1415                 return -EACCES;
1416
1417         dentry->d_inode = inode;
1418         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
1419 }
1420
1421 /*
1422  * Concurrency: @dt is write locked.
1423  */
1424 static int osd_xattr_del(const struct lu_env *env,
1425                          struct dt_object *dt,
1426                          const char *name,
1427                          struct thandle *handle,
1428                          struct lustre_capa *capa)
1429 {
1430         struct osd_object      *obj    = osd_dt_obj(dt);
1431         struct inode           *inode  = obj->oo_inode;
1432         struct osd_thread_info *info   = osd_oti_get(env);
1433         struct dentry          *dentry = &info->oti_dentry;
1434
1435         LASSERT(dt_object_exists(dt));
1436         LASSERT(inode->i_op != NULL && inode->i_op->removexattr != NULL);
1437         LASSERT(osd_write_locked(env, obj));
1438         LASSERT(handle != NULL);
1439
1440         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
1441                 return -EACCES;
1442
1443         dentry->d_inode = inode;
1444         return inode->i_op->removexattr(dentry, name);
1445 }
1446
1447 static struct obd_capa *osd_capa_get(const struct lu_env *env,
1448                                      struct dt_object *dt,
1449                                      struct lustre_capa *old,
1450                                      __u64 opc)
1451 {
1452         struct osd_thread_info *info = osd_oti_get(env);
1453         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
1454         struct osd_object *obj = osd_dt_obj(dt);
1455         struct osd_device *dev = osd_obj2dev(obj);
1456         struct lustre_capa_key *key = &info->oti_capa_key;
1457         struct lustre_capa *capa = &info->oti_capa;
1458         struct obd_capa *oc;
1459         int rc;
1460         ENTRY;
1461
1462         if (!dev->od_fl_capa)
1463                 RETURN(ERR_PTR(-ENOENT));
1464
1465         LASSERT(dt_object_exists(dt));
1466         LASSERT(osd_invariant(obj));
1467
1468         /* renewal sanity check */
1469         if (old && osd_object_auth(env, dt, old, opc))
1470                 RETURN(ERR_PTR(-EACCES));
1471
1472         capa->lc_fid = *fid;
1473         capa->lc_opc = opc;
1474         capa->lc_uid = 0;
1475         capa->lc_flags = dev->od_capa_alg << 24;
1476         capa->lc_timeout = dev->od_capa_timeout;
1477         capa->lc_expiry = 0;
1478
1479         oc = capa_lookup(dev->od_capa_hash, capa, 1);
1480         if (oc) {
1481                 LASSERT(!capa_is_expired(oc));
1482                 RETURN(oc);
1483         }
1484
1485         spin_lock(&capa_lock);
1486         *key = dev->od_capa_keys[1];
1487         spin_unlock(&capa_lock);
1488
1489         capa->lc_keyid = key->lk_keyid;
1490         capa->lc_expiry = cfs_time_current_sec() + dev->od_capa_timeout;
1491
1492         rc = capa_hmac(capa->lc_hmac, capa, key->lk_key);
1493         if (rc) {
1494                 DEBUG_CAPA(D_ERROR, capa, "HMAC failed: %d for", rc);
1495                 RETURN(ERR_PTR(rc));
1496         }
1497
1498         oc = capa_add(dev->od_capa_hash, capa);
1499         RETURN(oc);
1500 }
1501
1502 static struct dt_object_operations osd_obj_ops = {
1503         .do_read_lock    = osd_object_read_lock,
1504         .do_write_lock   = osd_object_write_lock,
1505         .do_read_unlock  = osd_object_read_unlock,
1506         .do_write_unlock = osd_object_write_unlock,
1507         .do_attr_get     = osd_attr_get,
1508         .do_attr_set     = osd_attr_set,
1509         .do_ah_init      = osd_ah_init,
1510         .do_create       = osd_object_create,
1511         .do_index_try    = osd_index_try,
1512         .do_ref_add      = osd_object_ref_add,
1513         .do_ref_del      = osd_object_ref_del,
1514         .do_xattr_get    = osd_xattr_get,
1515         .do_xattr_set    = osd_xattr_set,
1516         .do_xattr_del    = osd_xattr_del,
1517         .do_xattr_list   = osd_xattr_list,
1518         .do_capa_get     = osd_capa_get,
1519 };
1520
1521 /*
1522  * Body operations.
1523  */
1524
1525 /*
1526  * XXX: Another layering violation for now.
1527  *
1528  * We don't want to use ->f_op->read methods, because generic file write
1529  *
1530  *         - serializes on ->i_sem, and
1531  *
1532  *         - does a lot of extra work like balance_dirty_pages(),
1533  *
1534  * which doesn't work for globally shared files like /last-received.
1535  */
1536 int fsfilt_ldiskfs_read(struct inode *inode, void *buf, int size, loff_t *offs);
1537 int fsfilt_ldiskfs_write_handle(struct inode *inode, void *buf, int bufsize,
1538                                 loff_t *offs, handle_t *handle);
1539
1540 static ssize_t osd_read(const struct lu_env *env, struct dt_object *dt,
1541                         struct lu_buf *buf, loff_t *pos,
1542                         struct lustre_capa *capa)
1543 {
1544         struct inode *inode = osd_dt_obj(dt)->oo_inode;
1545
1546         if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_READ))
1547                 RETURN(-EACCES);
1548
1549         return fsfilt_ldiskfs_read(inode, buf->lb_buf, buf->lb_len, pos);
1550 }
1551
1552 static ssize_t osd_write(const struct lu_env *env, struct dt_object *dt,
1553                          const struct lu_buf *buf, loff_t *pos,
1554                          struct thandle *handle, struct lustre_capa *capa)
1555 {
1556         struct inode       *inode = osd_dt_obj(dt)->oo_inode;
1557         struct osd_thandle *oh;
1558         ssize_t             result;
1559
1560         LASSERT(handle != NULL);
1561
1562         if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_WRITE))
1563                 RETURN(-EACCES);
1564
1565         oh = container_of(handle, struct osd_thandle, ot_super);
1566         LASSERT(oh->ot_handle->h_transaction != NULL);
1567         result = fsfilt_ldiskfs_write_handle(inode, buf->lb_buf, buf->lb_len,
1568                                              pos, oh->ot_handle);
1569         if (result == 0)
1570                 result = buf->lb_len;
1571         return result;
1572 }
1573
1574 static struct dt_body_operations osd_body_ops = {
1575         .dbo_read  = osd_read,
1576         .dbo_write = osd_write
1577 };
1578
1579 /*
1580  * Index operations.
1581  */
1582
1583 static int osd_object_is_root(const struct osd_object *obj)
1584 {
1585         return osd_sb(osd_obj2dev(obj))->s_root->d_inode == obj->oo_inode;
1586 }
1587
1588 static int osd_index_probe(const struct lu_env *env, struct osd_object *o,
1589                            const struct dt_index_features *feat)
1590 {
1591         struct iam_descr *descr;
1592
1593         if (osd_object_is_root(o))
1594                 return feat == &dt_directory_features;
1595
1596         LASSERT(o->oo_dir != NULL);
1597
1598         descr = o->oo_dir->od_container.ic_descr;
1599         if (feat == &dt_directory_features)
1600                 return descr == &iam_htree_compat_param ||
1601                         (descr->id_rec_size == sizeof(struct lu_fid_pack) &&
1602                          1 /*
1603                             * XXX check that index looks like directory.
1604                             */
1605                                 );
1606         else
1607                 return
1608                         feat->dif_keysize_min <= descr->id_key_size &&
1609                         descr->id_key_size <= feat->dif_keysize_max &&
1610                         feat->dif_recsize_min <= descr->id_rec_size &&
1611                         descr->id_rec_size <= feat->dif_recsize_max &&
1612                         !(feat->dif_flags & (DT_IND_VARKEY |
1613                                              DT_IND_VARREC | DT_IND_NONUNQ)) &&
1614                         ergo(feat->dif_flags & DT_IND_UPDATE,
1615                              1 /* XXX check that object (and file system) is
1616                                 * writable */);
1617 }
1618
1619 static int osd_container_init(const struct lu_env *env,
1620                               struct osd_object *obj,
1621                               struct osd_directory *dir)
1622 {
1623         int result;
1624         struct iam_container *bag;
1625
1626         bag    = &dir->od_container;
1627         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
1628         if (result == 0) {
1629                 result = iam_container_setup(bag);
1630                 if (result == 0)
1631                         obj->oo_dt.do_index_ops = &osd_index_ops;
1632                 else
1633                         iam_container_fini(bag);
1634         }
1635         return result;
1636 }
1637
1638 /*
1639  * Concurrency: no external locking is necessary.
1640  */
1641 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
1642                          const struct dt_index_features *feat)
1643 {
1644         int result;
1645         struct osd_object *obj = osd_dt_obj(dt);
1646
1647         LASSERT(osd_invariant(obj));
1648         LASSERT(dt_object_exists(dt));
1649
1650         if (osd_object_is_root(obj)) {
1651                 dt->do_index_ops = &osd_index_compat_ops;
1652                 result = 0;
1653         } else if (!osd_has_index(obj)) {
1654                 struct osd_directory *dir;
1655
1656                 OBD_ALLOC_PTR(dir);
1657                 if (dir != NULL) {
1658                         sema_init(&dir->od_sem, 1);
1659
1660                         spin_lock(&obj->oo_guard);
1661                         if (obj->oo_dir == NULL)
1662                                 obj->oo_dir = dir;
1663                         else
1664                                 /*
1665                                  * Concurrent thread allocated container data.
1666                                  */
1667                                 OBD_FREE_PTR(dir);
1668                         spin_unlock(&obj->oo_guard);
1669                         /*
1670                          * Now, that we have container data, serialize its
1671                          * initialization.
1672                          */
1673                         down(&obj->oo_dir->od_sem);
1674                         /*
1675                          * recheck under lock.
1676                          */
1677                         if (!osd_has_index(obj))
1678                                 result = osd_container_init(env, obj, dir);
1679                         else
1680                                 result = 0;
1681                         up(&obj->oo_dir->od_sem);
1682                 } else
1683                         result = -ENOMEM;
1684         } else
1685                 result = 0;
1686
1687         if (result == 0) {
1688                 if (!osd_index_probe(env, obj, feat))
1689                         result = -ENOTDIR;
1690         }
1691         LASSERT(osd_invariant(obj));
1692
1693         return result;
1694 }
1695
1696 static int osd_index_delete(const struct lu_env *env, struct dt_object *dt,
1697                             const struct dt_key *key, struct thandle *handle,
1698                             struct lustre_capa *capa)
1699 {
1700         struct osd_object     *obj = osd_dt_obj(dt);
1701         struct osd_thandle    *oh;
1702         struct iam_path_descr *ipd;
1703         struct iam_container  *bag = &obj->oo_dir->od_container;
1704         int rc;
1705
1706         ENTRY;
1707
1708         LASSERT(osd_invariant(obj));
1709         LASSERT(dt_object_exists(dt));
1710         LASSERT(bag->ic_object == obj->oo_inode);
1711         LASSERT(handle != NULL);
1712
1713         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
1714                 RETURN(-EACCES);
1715
1716         ipd = osd_ipd_get(env, bag);
1717         if (unlikely(ipd == NULL))
1718                 RETURN(-ENOMEM);
1719
1720         oh = container_of0(handle, struct osd_thandle, ot_super);
1721         LASSERT(oh->ot_handle != NULL);
1722         LASSERT(oh->ot_handle->h_transaction != NULL);
1723
1724         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
1725         osd_ipd_put(env, bag, ipd);
1726         LASSERT(osd_invariant(obj));
1727         RETURN(rc);
1728 }
1729
1730 static int osd_index_lookup(const struct lu_env *env, struct dt_object *dt,
1731                             struct dt_rec *rec, const struct dt_key *key,
1732                             struct lustre_capa *capa)
1733 {
1734         struct osd_object     *obj = osd_dt_obj(dt);
1735         struct iam_path_descr *ipd;
1736         struct iam_container  *bag = &obj->oo_dir->od_container;
1737         int rc;
1738
1739         ENTRY;
1740
1741         LASSERT(osd_invariant(obj));
1742         LASSERT(dt_object_exists(dt));
1743         LASSERT(bag->ic_object == obj->oo_inode);
1744
1745         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_LOOKUP))
1746                 return -EACCES;
1747
1748         ipd = osd_ipd_get(env, bag);
1749         if (unlikely(ipd == NULL))
1750                 RETURN(-ENOMEM);
1751
1752         rc = iam_lookup(bag, (const struct iam_key *)key,
1753                         (struct iam_rec *)rec, ipd);
1754         osd_ipd_put(env, bag, ipd);
1755         LASSERT(osd_invariant(obj));
1756
1757         RETURN(rc);
1758 }
1759
1760 static int osd_index_insert(const struct lu_env *env, struct dt_object *dt,
1761                             const struct dt_rec *rec, const struct dt_key *key,
1762                             struct thandle *th, struct lustre_capa *capa)
1763 {
1764         struct osd_object     *obj = osd_dt_obj(dt);
1765         struct iam_path_descr *ipd;
1766         struct osd_thandle    *oh;
1767         struct iam_container  *bag = &obj->oo_dir->od_container;
1768         int rc;
1769
1770         ENTRY;
1771
1772         LASSERT(osd_invariant(obj));
1773         LASSERT(dt_object_exists(dt));
1774         LASSERT(bag->ic_object == obj->oo_inode);
1775         LASSERT(th != NULL);
1776
1777         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
1778                 return -EACCES;
1779
1780         ipd = osd_ipd_get(env, bag);
1781         if (unlikely(ipd == NULL))
1782                 RETURN(-ENOMEM);
1783
1784         oh = container_of0(th, struct osd_thandle, ot_super);
1785         LASSERT(oh->ot_handle != NULL);
1786         LASSERT(oh->ot_handle->h_transaction != NULL);
1787         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
1788                         (struct iam_rec *)rec, ipd);
1789         osd_ipd_put(env, bag, ipd);
1790         LASSERT(osd_invariant(obj));
1791         RETURN(rc);
1792 }
1793
1794 /*
1795  * Iterator operations.
1796  */
1797 struct osd_it {
1798         struct osd_object     *oi_obj;
1799         struct iam_path_descr *oi_ipd;
1800         struct iam_iterator    oi_it;
1801 };
1802
1803 static struct dt_it *osd_it_init(const struct lu_env *env,
1804                                  struct dt_object *dt, int writable,
1805                                  struct lustre_capa *capa)
1806 {
1807         struct osd_it         *it;
1808         struct osd_object     *obj = osd_dt_obj(dt);
1809         struct lu_object      *lo  = &dt->do_lu;
1810         struct iam_path_descr *ipd;
1811         struct iam_container  *bag = &obj->oo_dir->od_container;
1812         __u32                  flags;
1813
1814         LASSERT(lu_object_exists(lo));
1815
1816         if (osd_object_auth(env, dt, capa, writable ? CAPA_OPC_BODY_WRITE :
1817                             CAPA_OPC_BODY_READ))
1818                 return ERR_PTR(-EACCES);
1819
1820         flags = writable ? IAM_IT_MOVE|IAM_IT_WRITE : IAM_IT_MOVE;
1821         OBD_ALLOC_PTR(it);
1822         if (it != NULL) {
1823                 /*
1824                  * XXX: as ipd is allocated within osd_thread_info, assignment
1825                  * below implies that iterator usage is confined within single
1826                  * environment.
1827                  */
1828                 ipd = osd_ipd_get(env, bag);
1829                 if (likely(ipd != NULL)) {
1830                         it->oi_obj = obj;
1831                         it->oi_ipd = ipd;
1832                         lu_object_get(lo);
1833                         iam_it_init(&it->oi_it, bag, flags, ipd);
1834                         return (struct dt_it *)it;
1835                 } else
1836                         OBD_FREE_PTR(it);
1837         }
1838         return ERR_PTR(-ENOMEM);
1839 }
1840
1841 static void osd_it_fini(const struct lu_env *env, struct dt_it *di)
1842 {
1843         struct osd_it     *it = (struct osd_it *)di;
1844         struct osd_object *obj = it->oi_obj;
1845
1846         iam_it_fini(&it->oi_it);
1847         osd_ipd_put(env, &obj->oo_dir->od_container, it->oi_ipd);
1848         lu_object_put(env, &obj->oo_dt.do_lu);
1849         OBD_FREE_PTR(it);
1850 }
1851
1852 static int osd_it_get(const struct lu_env *env,
1853                       struct dt_it *di, const struct dt_key *key)
1854 {
1855         struct osd_it *it = (struct osd_it *)di;
1856
1857         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
1858 }
1859
1860 static void osd_it_put(const struct lu_env *env, struct dt_it *di)
1861 {
1862         struct osd_it *it = (struct osd_it *)di;
1863
1864         iam_it_put(&it->oi_it);
1865 }
1866
1867 static int osd_it_next(const struct lu_env *env, struct dt_it *di)
1868 {
1869         struct osd_it *it = (struct osd_it *)di;
1870
1871         return iam_it_next(&it->oi_it);
1872 }
1873
1874 static int osd_it_del(const struct lu_env *env, struct dt_it *di,
1875                       struct thandle *th)
1876 {
1877         struct osd_it      *it = (struct osd_it *)di;
1878         struct osd_thandle *oh;
1879
1880         LASSERT(th != NULL);
1881
1882         oh = container_of0(th, struct osd_thandle, ot_super);
1883         LASSERT(oh->ot_handle != NULL);
1884         LASSERT(oh->ot_handle->h_transaction != NULL);
1885
1886         return iam_it_rec_delete(oh->ot_handle, &it->oi_it);
1887 }
1888
1889 static struct dt_key *osd_it_key(const struct lu_env *env,
1890                                  const struct dt_it *di)
1891 {
1892         struct osd_it *it = (struct osd_it *)di;
1893
1894         return (struct dt_key *)iam_it_key_get(&it->oi_it);
1895 }
1896
1897 static int osd_it_key_size(const struct lu_env *env, const struct dt_it *di)
1898 {
1899         struct osd_it *it = (struct osd_it *)di;
1900
1901         return iam_it_key_size(&it->oi_it);
1902 }
1903
1904 static struct dt_rec *osd_it_rec(const struct lu_env *env,
1905                                  const struct dt_it *di)
1906 {
1907         struct osd_it *it = (struct osd_it *)di;
1908
1909         return (struct dt_rec *)iam_it_rec_get(&it->oi_it);
1910 }
1911
1912 static __u64 osd_it_store(const struct lu_env *env, const struct dt_it *di)
1913 {
1914         struct osd_it *it = (struct osd_it *)di;
1915
1916         return iam_it_store(&it->oi_it);
1917 }
1918
1919 static int osd_it_load(const struct lu_env *env,
1920                        const struct dt_it *di, __u64 hash)
1921 {
1922         struct osd_it *it = (struct osd_it *)di;
1923
1924         return iam_it_load(&it->oi_it, hash);
1925 }
1926
1927 static struct dt_index_operations osd_index_ops = {
1928         .dio_lookup = osd_index_lookup,
1929         .dio_insert = osd_index_insert,
1930         .dio_delete = osd_index_delete,
1931         .dio_it     = {
1932                 .init     = osd_it_init,
1933                 .fini     = osd_it_fini,
1934                 .get      = osd_it_get,
1935                 .put      = osd_it_put,
1936                 .del      = osd_it_del,
1937                 .next     = osd_it_next,
1938                 .key      = osd_it_key,
1939                 .key_size = osd_it_key_size,
1940                 .rec      = osd_it_rec,
1941                 .store    = osd_it_store,
1942                 .load     = osd_it_load
1943         }
1944 };
1945
1946 static int osd_index_compat_delete(const struct lu_env *env,
1947                                    struct dt_object *dt,
1948                                    const struct dt_key *key,
1949                                    struct thandle *handle,
1950                                    struct lustre_capa *capa)
1951 {
1952         struct osd_object *obj = osd_dt_obj(dt);
1953
1954         LASSERT(handle != NULL);
1955         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
1956         ENTRY;
1957
1958 #if 0
1959         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
1960                 RETURN(-EACCES);
1961 #endif
1962
1963         RETURN(-EOPNOTSUPP);
1964 }
1965
1966 /*
1967  * Compatibility index operations.
1968  */
1969
1970
1971 static void osd_build_pack(const struct lu_env *env, struct osd_device *osd,
1972                            struct dentry *dentry, struct lu_fid_pack *pack)
1973 {
1974         struct inode  *inode = dentry->d_inode;
1975         struct lu_fid *fid   = &osd_oti_get(env)->oti_fid;
1976
1977         lu_igif_build(fid, inode->i_ino, inode->i_generation);
1978         fid_cpu_to_be(fid, fid);
1979         pack->fp_len = sizeof *fid + 1;
1980         memcpy(pack->fp_area, fid, sizeof *fid);
1981 }
1982
1983 static int osd_index_compat_lookup(const struct lu_env *env,
1984                                    struct dt_object *dt,
1985                                    struct dt_rec *rec, const struct dt_key *key,
1986                                    struct lustre_capa *capa)
1987 {
1988         struct osd_object *obj = osd_dt_obj(dt);
1989
1990         struct osd_device      *osd  = osd_obj2dev(obj);
1991         struct osd_thread_info *info = osd_oti_get(env);
1992         struct inode           *dir;
1993
1994         int result;
1995
1996         /*
1997          * XXX temporary solution.
1998          */
1999         struct dentry *dentry;
2000         struct dentry *parent;
2001
2002         LASSERT(osd_invariant(obj));
2003         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
2004         LASSERT(osd_has_index(obj));
2005
2006         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_LOOKUP))
2007                 return -EACCES;
2008
2009         info->oti_str.name = (const char *)key;
2010         info->oti_str.len  = strlen((const char *)key);
2011
2012         dir = obj->oo_inode;
2013         LASSERT(dir->i_op != NULL && dir->i_op->lookup != NULL);
2014
2015         parent = d_alloc_root(dir);
2016         if (parent == NULL)
2017                 return -ENOMEM;
2018         igrab(dir);
2019         dentry = d_alloc(parent, &info->oti_str);
2020         if (dentry != NULL) {
2021                 struct dentry *d;
2022
2023                 /*
2024                  * XXX passing NULL for nameidata should work for
2025                  * ext3/ldiskfs.
2026                  */
2027                 d = dir->i_op->lookup(dir, dentry, NULL);
2028                 if (d == NULL) {
2029                         /*
2030                          * normal case, result is in @dentry.
2031                          */
2032                         if (dentry->d_inode != NULL) {
2033                                 osd_build_pack(env, osd, dentry,
2034                                                (struct lu_fid_pack *)rec);
2035                                 result = 0;
2036                         } else
2037                                 result = -ENOENT;
2038                  } else {
2039                         /* What? Disconnected alias? Ppheeeww... */
2040                         CERROR("Aliasing where not expected\n");
2041                         result = -EIO;
2042                         dput(d);
2043                 }
2044                 dput(dentry);
2045         } else
2046                 result = -ENOMEM;
2047         dput(parent);
2048         LASSERT(osd_invariant(obj));
2049         return result;
2050 }
2051
2052 static int osd_add_rec(struct osd_thread_info *info, struct osd_device *dev,
2053                        struct inode *dir, struct inode *inode, const char *name)
2054 {
2055         struct dentry *old;
2056         struct dentry *new;
2057         struct dentry *parent;
2058
2059         int result;
2060
2061         info->oti_str.name = name;
2062         info->oti_str.len  = strlen(name);
2063
2064         LASSERT(atomic_read(&dir->i_count) > 0);
2065         result = -ENOMEM;
2066         old = d_alloc(dev->od_obj_area, &info->oti_str);
2067         if (old != NULL) {
2068                 d_instantiate(old, inode);
2069                 igrab(inode);
2070                 LASSERT(atomic_read(&dir->i_count) > 0);
2071                 parent = d_alloc_root(dir);
2072                 if (parent != NULL) {
2073                         igrab(dir);
2074                         LASSERT(atomic_read(&dir->i_count) > 1);
2075                         new = d_alloc(parent, &info->oti_str);
2076                         LASSERT(atomic_read(&dir->i_count) > 1);
2077                         if (new != NULL) {
2078                                 LASSERT(atomic_read(&dir->i_count) > 1);
2079                                 result = dir->i_op->link(old, dir, new);
2080                                 LASSERT(atomic_read(&dir->i_count) > 1);
2081                                 dput(new);
2082                                 LASSERT(atomic_read(&dir->i_count) > 1);
2083                         }
2084                         LASSERT(atomic_read(&dir->i_count) > 1);
2085                         dput(parent);
2086                         LASSERT(atomic_read(&dir->i_count) > 0);
2087                 }
2088                 dput(old);
2089         }
2090         LASSERT(atomic_read(&dir->i_count) > 0);
2091         return result;
2092 }
2093
2094
2095 /*
2096  * XXX Temporary stuff.
2097  */
2098 static int osd_index_compat_insert(const struct lu_env *env,
2099                                    struct dt_object *dt,
2100                                    const struct dt_rec *rec,
2101                                    const struct dt_key *key, struct thandle *th,
2102                                    struct lustre_capa *capa)
2103 {
2104         struct osd_object     *obj = osd_dt_obj(dt);
2105
2106         const char          *name = (const char *)key;
2107
2108         struct lu_device    *ludev = dt->do_lu.lo_dev;
2109         struct lu_object    *luch;
2110
2111         struct osd_thread_info   *info = osd_oti_get(env);
2112         const struct lu_fid_pack *pack  = (const struct lu_fid_pack *)rec;
2113         struct lu_fid            *fid   = &osd_oti_get(env)->oti_fid;
2114
2115         int result;
2116
2117         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
2118         LASSERT(osd_invariant(obj));
2119         LASSERT(th != NULL);
2120
2121         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
2122                 return -EACCES;
2123
2124         result = fid_unpack(pack, fid);
2125         if (result != 0)
2126                 return result;
2127
2128         luch = lu_object_find(env, ludev->ld_site, fid);
2129         if (!IS_ERR(luch)) {
2130                 if (lu_object_exists(luch)) {
2131                         struct osd_object *child;
2132
2133                         child = osd_obj(lu_object_locate(luch->lo_header,
2134                                                          ludev->ld_type));
2135                         if (child != NULL)
2136                                 result = osd_add_rec(info, osd_obj2dev(obj),
2137                                                      obj->oo_inode,
2138                                                      child->oo_inode, name);
2139                         else {
2140                                 CERROR("No osd slice.\n");
2141                                 result = -ENOENT;
2142                         }
2143                         LASSERT(osd_invariant(obj));
2144                         LASSERT(osd_invariant(child));
2145                 } else {
2146                         CERROR("Sorry.\n");
2147                         result = -ENOENT;
2148                 }
2149                 lu_object_put(env, luch);
2150         } else
2151                 result = PTR_ERR(luch);
2152         LASSERT(osd_invariant(obj));
2153         return result;
2154 }
2155
2156 static struct dt_index_operations osd_index_compat_ops = {
2157         .dio_lookup = osd_index_compat_lookup,
2158         .dio_insert = osd_index_compat_insert,
2159         .dio_delete = osd_index_compat_delete
2160 };
2161
2162 /* type constructor/destructor: osd_type_init, osd_type_fini */
2163 LU_TYPE_INIT_FINI(osd, &osd_key);
2164
2165 static struct lu_context_key osd_key = {
2166         .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD,
2167         .lct_init = osd_key_init,
2168         .lct_fini = osd_key_fini,
2169         .lct_exit = osd_key_exit
2170 };
2171
2172 static void *osd_key_init(const struct lu_context *ctx,
2173                           struct lu_context_key *key)
2174 {
2175         struct osd_thread_info *info;
2176
2177         OBD_ALLOC_PTR(info);
2178         if (info != NULL)
2179                 info->oti_env = container_of(ctx, struct lu_env, le_ctx);
2180         else
2181                 info = ERR_PTR(-ENOMEM);
2182         return info;
2183 }
2184
2185 /* context key destructor: osd_key_fini */
2186 LU_KEY_FINI(osd, struct osd_thread_info);
2187
2188 static void osd_key_exit(const struct lu_context *ctx,
2189                          struct lu_context_key *key, void *data)
2190 {
2191 #if OSD_COUNTERS
2192         struct osd_thread_info *info = data;
2193
2194         LASSERT(info->oti_r_locks == 0);
2195         LASSERT(info->oti_w_locks == 0);
2196         LASSERT(info->oti_txns    == 0);
2197 #endif
2198 }
2199
2200 static int osd_device_init(const struct lu_env *env, struct lu_device *d,
2201                            const char *name, struct lu_device *next)
2202 {
2203         int rc;
2204         /* context for commit hooks */
2205         rc = lu_context_init(&osd_dev(d)->od_env_for_commit.le_ctx,
2206                              LCT_MD_THREAD);
2207         if (rc == 0)
2208                 rc = osd_procfs_init(osd_dev(d), name);
2209         return rc;
2210 }
2211
2212 static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
2213 {
2214         struct osd_thread_info *info = osd_oti_get(env);
2215         ENTRY;
2216         if (o->od_obj_area != NULL) {
2217                 dput(o->od_obj_area);
2218                 o->od_obj_area = NULL;
2219         }
2220         osd_oi_fini(info, &o->od_oi);
2221
2222         RETURN(0);
2223 }
2224
2225 static int osd_mount(const struct lu_env *env,
2226                      struct osd_device *o, struct lustre_cfg *cfg)
2227 {
2228         struct lustre_mount_info *lmi;
2229         const char               *dev  = lustre_cfg_string(cfg, 0);
2230         struct osd_thread_info   *info = osd_oti_get(env);
2231         int result;
2232
2233         ENTRY;
2234
2235         if (o->od_mount != NULL) {
2236                 CERROR("Already mounted (%s)\n", dev);
2237                 RETURN(-EEXIST);
2238         }
2239
2240         /* get mount */
2241         lmi = server_get_mount(dev);
2242         if (lmi == NULL) {
2243                 CERROR("Cannot get mount info for %s!\n", dev);
2244                 RETURN(-EFAULT);
2245         }
2246
2247         LASSERT(lmi != NULL);
2248         /* save lustre_mount_info in dt_device */
2249         o->od_mount = lmi;
2250
2251         result = osd_oi_init(info, &o->od_oi, &o->od_dt_dev);
2252         if (result == 0) {
2253                 struct dentry *d;
2254
2255                 d = simple_mkdir(osd_sb(o)->s_root, "*OBJ-TEMP*", 0777, 1);
2256                 if (!IS_ERR(d)) {
2257                         o->od_obj_area = d;
2258                 } else
2259                         result = PTR_ERR(d);
2260         }
2261         if (result != 0)
2262                 osd_shutdown(env, o);
2263         RETURN(result);
2264 }
2265
2266 static struct lu_device *osd_device_fini(const struct lu_env *env,
2267                                          struct lu_device *d)
2268 {
2269         int rc;
2270         ENTRY;
2271
2272         shrink_dcache_sb(osd_sb(osd_dev(d)));
2273         osd_sync(env, lu2dt_dev(d));
2274
2275         rc = osd_procfs_fini(osd_dev(d));
2276         if (rc) {
2277                 CERROR("proc fini error %d \n", rc);
2278                 RETURN (ERR_PTR(rc));
2279         }
2280
2281         if (osd_dev(d)->od_mount)
2282                 server_put_mount(osd_dev(d)->od_mount->lmi_name,
2283                                  osd_dev(d)->od_mount->lmi_mnt);
2284         osd_dev(d)->od_mount = NULL;
2285
2286         lu_context_fini(&osd_dev(d)->od_env_for_commit.le_ctx);
2287         RETURN(NULL);
2288 }
2289
2290 static struct lu_device *osd_device_alloc(const struct lu_env *env,
2291                                           struct lu_device_type *t,
2292                                           struct lustre_cfg *cfg)
2293 {
2294         struct lu_device  *l;
2295         struct osd_device *o;
2296
2297         OBD_ALLOC_PTR(o);
2298         if (o != NULL) {
2299                 int result;
2300
2301                 result = dt_device_init(&o->od_dt_dev, t);
2302                 if (result == 0) {
2303                         l = osd2lu_dev(o);
2304                         l->ld_ops = &osd_lu_ops;
2305                         o->od_dt_dev.dd_ops = &osd_dt_ops;
2306                         spin_lock_init(&o->od_osfs_lock);
2307                         o->od_osfs_age = cfs_time_shift_64(-1000);
2308                         o->od_capa_hash = init_capa_hash();
2309                         if (o->od_capa_hash == NULL)
2310                                 l = ERR_PTR(-ENOMEM);
2311                 } else
2312                         l = ERR_PTR(result);
2313         } else
2314                 l = ERR_PTR(-ENOMEM);
2315         return l;
2316 }
2317
2318 static struct lu_device *osd_device_free(const struct lu_env *env,
2319                                          struct lu_device *d)
2320 {
2321         struct osd_device *o = osd_dev(d);
2322         ENTRY;
2323
2324         cleanup_capa_hash(o->od_capa_hash);
2325         dt_device_fini(&o->od_dt_dev);
2326         OBD_FREE_PTR(o);
2327         RETURN(NULL);
2328 }
2329
2330 static int osd_process_config(const struct lu_env *env,
2331                               struct lu_device *d, struct lustre_cfg *cfg)
2332 {
2333         struct osd_device *o = osd_dev(d);
2334         int err;
2335         ENTRY;
2336
2337         switch(cfg->lcfg_command) {
2338         case LCFG_SETUP:
2339                 err = osd_mount(env, o, cfg);
2340                 break;
2341         case LCFG_CLEANUP:
2342                 err = osd_shutdown(env, o);
2343                 break;
2344         default:
2345                 err = -ENOTTY;
2346         }
2347
2348         RETURN(err);
2349 }
2350 extern void ldiskfs_orphan_cleanup (struct super_block * sb,
2351                                     struct ldiskfs_super_block * es);
2352
2353 static int osd_recovery_complete(const struct lu_env *env,
2354                                  struct lu_device *d)
2355 {
2356         struct osd_device *o = osd_dev(d);
2357         ENTRY;
2358         /* TODO: orphans handling */
2359         ldiskfs_orphan_cleanup(osd_sb(o), LDISKFS_SB(osd_sb(o))->s_es);
2360         RETURN(0);
2361 }
2362
2363 static struct inode *osd_iget(struct osd_thread_info *info,
2364                               struct osd_device *dev,
2365                               const struct osd_inode_id *id)
2366 {
2367         struct inode *inode;
2368
2369         inode = iget(osd_sb(dev), id->oii_ino);
2370         if (inode == NULL) {
2371                 CERROR("no inode\n");
2372                 inode = ERR_PTR(-EACCES);
2373         } else if (is_bad_inode(inode)) {
2374                 CERROR("bad inode\n");
2375                 iput(inode);
2376                 inode = ERR_PTR(-ENOENT);
2377         } else if (inode->i_generation != id->oii_gen) {
2378                 CERROR("stale inode\n");
2379                 iput(inode);
2380                 inode = ERR_PTR(-ESTALE);
2381         }
2382
2383         return inode;
2384
2385 }
2386
2387 static int osd_fid_lookup(const struct lu_env *env,
2388                           struct osd_object *obj, const struct lu_fid *fid)
2389 {
2390         struct osd_thread_info *info;
2391         struct lu_device       *ldev = obj->oo_dt.do_lu.lo_dev;
2392         struct osd_device      *dev;
2393         struct osd_inode_id    *id;
2394         struct osd_oi          *oi;
2395         struct inode           *inode;
2396         int                     result;
2397
2398         LASSERT(osd_invariant(obj));
2399         LASSERT(obj->oo_inode == NULL);
2400         LASSERT(fid_is_sane(fid));
2401         /*
2402          * This assertion checks that osd layer sees only local
2403          * fids. Unfortunately it is somewhat expensive (does a
2404          * cache-lookup). Disabling it for production/acceptance-testing.
2405          */
2406         LASSERT(1 || fid_is_local(ldev->ld_site, fid));
2407
2408         ENTRY;
2409
2410         info = osd_oti_get(env);
2411         dev  = osd_dev(ldev);
2412         id   = &info->oti_id;
2413         oi   = &dev->od_oi;
2414
2415         if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
2416                 RETURN(-ENOENT);
2417
2418         result = osd_oi_lookup(info, oi, fid, id);
2419         if (result == 0) {
2420                 inode = osd_iget(info, dev, id);
2421                 if (!IS_ERR(inode)) {
2422                         obj->oo_inode = inode;
2423                         LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
2424                         result = 0;
2425                 } else
2426                         /*
2427                          * If fid wasn't found in oi, inode-less object is
2428                          * created, for which lu_object_exists() returns
2429                          * false. This is used in a (frequent) case when
2430                          * objects are created as locking anchors or
2431                          * place holders for objects yet to be created.
2432                          */
2433                         result = PTR_ERR(inode);
2434         } else if (result == -ENOENT)
2435                 result = 0;
2436         LASSERT(osd_invariant(obj));
2437         RETURN(result);
2438 }
2439
2440 static void osd_inode_getattr(const struct lu_env *env,
2441                               struct inode *inode, struct lu_attr *attr)
2442 {
2443         attr->la_valid      |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
2444                                LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
2445                                LA_FLAGS | LA_NLINK | LA_RDEV | LA_BLKSIZE;
2446
2447         attr->la_atime      = LTIME_S(inode->i_atime);
2448         attr->la_mtime      = LTIME_S(inode->i_mtime);
2449         attr->la_ctime      = LTIME_S(inode->i_ctime);
2450         attr->la_mode       = inode->i_mode;
2451         attr->la_size       = i_size_read(inode);
2452         attr->la_blocks     = inode->i_blocks;
2453         attr->la_uid        = inode->i_uid;
2454         attr->la_gid        = inode->i_gid;
2455         attr->la_flags      = LDISKFS_I(inode)->i_flags;
2456         attr->la_nlink      = inode->i_nlink;
2457         attr->la_rdev       = inode->i_rdev;
2458         attr->la_blksize    = ll_inode_blksize(inode);
2459         attr->la_blkbits    = inode->i_blkbits;
2460 }
2461
2462 /*
2463  * Helpers.
2464  */
2465
2466 static int lu_device_is_osd(const struct lu_device *d)
2467 {
2468         return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &osd_lu_ops);
2469 }
2470
2471 static struct osd_object *osd_obj(const struct lu_object *o)
2472 {
2473         LASSERT(lu_device_is_osd(o->lo_dev));
2474         return container_of0(o, struct osd_object, oo_dt.do_lu);
2475 }
2476
2477 static struct osd_device *osd_dt_dev(const struct dt_device *d)
2478 {
2479         LASSERT(lu_device_is_osd(&d->dd_lu_dev));
2480         return container_of0(d, struct osd_device, od_dt_dev);
2481 }
2482
2483 static struct osd_device *osd_dev(const struct lu_device *d)
2484 {
2485         LASSERT(lu_device_is_osd(d));
2486         return osd_dt_dev(container_of0(d, struct dt_device, dd_lu_dev));
2487 }
2488
2489 static struct osd_object *osd_dt_obj(const struct dt_object *d)
2490 {
2491         return osd_obj(&d->do_lu);
2492 }
2493
2494 static struct osd_device *osd_obj2dev(const struct osd_object *o)
2495 {
2496         return osd_dev(o->oo_dt.do_lu.lo_dev);
2497 }
2498
2499 static struct lu_device *osd2lu_dev(struct osd_device *osd)
2500 {
2501         return &osd->od_dt_dev.dd_lu_dev;
2502 }
2503
2504 static struct super_block *osd_sb(const struct osd_device *dev)
2505 {
2506         return dev->od_mount->lmi_mnt->mnt_sb;
2507 }
2508
2509 static journal_t *osd_journal(const struct osd_device *dev)
2510 {
2511         return LDISKFS_SB(osd_sb(dev))->s_journal;
2512 }
2513
2514 static int osd_has_index(const struct osd_object *obj)
2515 {
2516         return obj->oo_dt.do_index_ops != NULL;
2517 }
2518
2519 static int osd_object_invariant(const struct lu_object *l)
2520 {
2521         return osd_invariant(osd_obj(l));
2522 }
2523
2524 static struct lu_object_operations osd_lu_obj_ops = {
2525         .loo_object_init      = osd_object_init,
2526         .loo_object_delete    = osd_object_delete,
2527         .loo_object_release   = osd_object_release,
2528         .loo_object_free      = osd_object_free,
2529         .loo_object_print     = osd_object_print,
2530         .loo_object_invariant = osd_object_invariant
2531 };
2532
2533 static struct lu_device_operations osd_lu_ops = {
2534         .ldo_object_alloc      = osd_object_alloc,
2535         .ldo_process_config    = osd_process_config,
2536         .ldo_recovery_complete = osd_recovery_complete
2537 };
2538
2539 static struct lu_device_type_operations osd_device_type_ops = {
2540         .ldto_init = osd_type_init,
2541         .ldto_fini = osd_type_fini,
2542
2543         .ldto_device_alloc = osd_device_alloc,
2544         .ldto_device_free  = osd_device_free,
2545
2546         .ldto_device_init    = osd_device_init,
2547         .ldto_device_fini    = osd_device_fini
2548 };
2549
2550 static struct lu_device_type osd_device_type = {
2551         .ldt_tags     = LU_DEVICE_DT,
2552         .ldt_name     = LUSTRE_OSD_NAME,
2553         .ldt_ops      = &osd_device_type_ops,
2554         .ldt_ctx_tags = LCT_MD_THREAD|LCT_DT_THREAD
2555 };
2556
2557 /*
2558  * lprocfs legacy support.
2559  */
2560 static struct obd_ops osd_obd_device_ops = {
2561         .o_owner = THIS_MODULE
2562 };
2563
2564 static int __init osd_mod_init(void)
2565 {
2566         struct lprocfs_static_vars lvars;
2567
2568         lprocfs_osd_init_vars(&lvars);
2569         return class_register_type(&osd_obd_device_ops, NULL, lvars.module_vars,
2570                                    LUSTRE_OSD_NAME, &osd_device_type);
2571 }
2572
2573 static void __exit osd_mod_exit(void)
2574 {
2575         class_unregister_type(LUSTRE_OSD_NAME);
2576 }
2577
2578 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2579 MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_NAME")");
2580 MODULE_LICENSE("GPL");
2581
2582 cfs_module(osd, "0.0.2", osd_mod_init, osd_mod_exit);