lustre/osd-ldiskfs/osd_handler.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/osd/osd_handler.c
  37  *
  38  * Top-level entry points into osd module
  39  *
  40  * Author: Nikita Danilov <nikita@clusterfs.com>
  41  *         Pravin Shelar <pravin.shelar@sun.com> : Added fid in dirent
  42  */
  43
  44 #define DEBUG_SUBSYSTEM S_OSD
  45
  46 #include <linux/module.h>
  47
  48 /* LUSTRE_VERSION_CODE */
  49 #include <lustre_ver.h>
  50 /* prerequisite for linux/xattr.h */
  51 #include <linux/types.h>
  52 /* prerequisite for linux/xattr.h */
  53 #include <linux/fs.h>
  54 /* XATTR_{REPLACE,CREATE} */
  55 #include <linux/xattr.h>
  56
  57 /*
  58  * struct OBD_{ALLOC,FREE}*()
  59  * OBD_FAIL_CHECK
  60  */
  61 #include <obd_support.h>
  62 /* struct ptlrpc_thread */
  63 #include <lustre_net.h>
  64 #include <lustre_fid.h>
  65 /* process_config */
  66 #include <lustre_param.h>
  67
  68 #include "osd_internal.h"
  69 #include "osd_dynlocks.h"
  70
  71 /* llo_* api support */
  72 #include <md_object.h>
  73 #include <lustre_quota.h>
  74
  75 #include <ldiskfs/xattr.h>
  76
  77 int ldiskfs_pdo = 1;
  78 CFS_MODULE_PARM(ldiskfs_pdo, "i", int, 0644,
  79                 "ldiskfs with parallel directory operations");
  80
  81 int ldiskfs_track_declares_assert;
  82 CFS_MODULE_PARM(ldiskfs_track_declares_assert, "i", int, 0644,
  83                 "LBUG during tracking of declares");
  84
  85 /* Slab to allocate dynlocks */
  86 struct kmem_cache *dynlock_cachep;
  87
  88 static struct lu_kmem_descr ldiskfs_caches[] = {
  89         {
  90                 .ckd_cache = &dynlock_cachep,
  91                 .ckd_name  = "dynlock_cache",
  92                 .ckd_size  = sizeof(struct dynlock_handle)
  93         },
  94         {
  95                 .ckd_cache = NULL
  96         }
  97 };
  98
  99 static const char dot[] = ".";
 100 static const char dotdot[] = "..";
 101 static const char remote_obj_dir[] = "REM_OBJ_DIR";
 102
 103 static const struct lu_object_operations      osd_lu_obj_ops;
 104 static const struct dt_object_operations      osd_obj_ops;
 105 static const struct dt_object_operations      osd_obj_ea_ops;
 106 static const struct dt_object_operations      osd_obj_otable_it_ops;
 107 static const struct dt_index_operations       osd_index_iam_ops;
 108 static const struct dt_index_operations       osd_index_ea_ops;
 109
 110 int osd_trans_declare_op2rb[] = {
 111         [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
 112         [OSD_OT_PUNCH]          = OSD_OT_MAX,
 113         [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
 114         [OSD_OT_CREATE]         = OSD_OT_DESTROY,
 115         [OSD_OT_DESTROY]        = OSD_OT_CREATE,
 116         [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
 117         [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
 118         [OSD_OT_WRITE]          = OSD_OT_WRITE,
 119         [OSD_OT_INSERT]         = OSD_OT_DELETE,
 120         [OSD_OT_DELETE]         = OSD_OT_INSERT,
 121         [OSD_OT_UPDATE]         = OSD_OT_MAX,
 122         [OSD_OT_QUOTA]          = OSD_OT_MAX,
 123 };
 124
 125 static int osd_has_index(const struct osd_object *obj)
 126 {
 127         return obj->oo_dt.do_index_ops != NULL;
 128 }
 129
 130 static int osd_object_invariant(const struct lu_object *l)
 131 {
 132         return osd_invariant(osd_obj(l));
 133 }
 134
 135 /*
 136  * Concurrency: doesn't matter
 137  */
 138
 139 /*
 140  * Concurrency: doesn't matter
 141  */
 142 static int osd_write_locked(const struct lu_env *env, struct osd_object *o)
 143 {
 144         struct osd_thread_info *oti = osd_oti_get(env);
 145         return oti->oti_w_locks > 0 && o->oo_owner == env;
 146 }
 147
 148 /*
 149  * Concurrency: doesn't access mutable data
 150  */
 151 static int osd_root_get(const struct lu_env *env,
 152                         struct dt_device *dev, struct lu_fid *f)
 153 {
 154         lu_local_obj_fid(f, OSD_FS_ROOT_OID);
 155         return 0;
 156 }
 157
 158 /*
 159  * OSD object methods.
 160  */
 161
 162 /*
 163  * Concurrency: no concurrent access is possible that early in object
 164  * life-cycle.
 165  */
 166 static struct lu_object *osd_object_alloc(const struct lu_env *env,
 167                                           const struct lu_object_header *hdr,
 168                                           struct lu_device *d)
 169 {
 170         struct osd_object *mo;
 171
 172         OBD_ALLOC_PTR(mo);
 173         if (mo != NULL) {
 174                 struct lu_object *l;
 175
 176                 l = &mo->oo_dt.do_lu;
 177                 dt_object_init(&mo->oo_dt, NULL, d);
 178                 mo->oo_dt.do_ops = &osd_obj_ea_ops;
 179                 l->lo_ops = &osd_lu_obj_ops;
 180                 init_rwsem(&mo->oo_sem);
 181                 init_rwsem(&mo->oo_ext_idx_sem);
 182                 spin_lock_init(&mo->oo_guard);
 183                 return l;
 184         } else {
 185                 return NULL;
 186         }
 187 }
 188
 189 int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
 190                 struct dentry *dentry, struct lustre_mdt_attrs *lma)
 191 {
 192         int rc;
 193
 194         CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
 195         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 196                              info->oti_mdt_attrs_old, LMA_OLD_SIZE);
 197         if (rc > 0) {
 198                 if ((void *)lma != (void *)info->oti_mdt_attrs_old)
 199                         memcpy(lma, info->oti_mdt_attrs_old, sizeof(*lma));
 200                 rc = 0;
 201                 lustre_lma_swab(lma);
 202                 /* Check LMA compatibility */
 203                 if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
 204                         CWARN("%.16s: unsupported incompat LMA feature(s) %#x "
 205                               "for fid = "DFID", ino = %lu\n",
 206                               LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
 207                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 208                               PFID(&lma->lma_self_fid), inode->i_ino);
 209                         rc = -EOPNOTSUPP;
 210                 }
 211         } else if (rc == 0) {
 212                 rc = -ENODATA;
 213         }
 214
 215         return rc;
 216 }
 217
 218 /*
 219  * retrieve object from backend ext fs.
 220  **/
 221 struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
 222                        struct osd_inode_id *id)
 223 {
 224         struct inode *inode = NULL;
 225
 226         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
 227         if (IS_ERR(inode)) {
 228                 CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
 229                        id->oii_ino, PTR_ERR(inode));
 230         } else if (id->oii_gen != OSD_OII_NOGEN &&
 231                    inode->i_generation != id->oii_gen) {
 232                 CDEBUG(D_INODE, "unmatched inode: ino = %u, oii_gen = %u, "
 233                        "i_generation = %u\n",
 234                        id->oii_ino, id->oii_gen, inode->i_generation);
 235                 iput(inode);
 236                 inode = ERR_PTR(-ESTALE);
 237         } else if (inode->i_nlink == 0) {
 238                 /* due to parallel readdir and unlink,
 239                 * we can have dead inode here. */
 240                 CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
 241                 iput(inode);
 242                 inode = ERR_PTR(-ESTALE);
 243         } else if (is_bad_inode(inode)) {
 244                 CWARN("%.16s: bad inode: ino = %u\n",
 245                 LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name, id->oii_ino);
 246                 iput(inode);
 247                 inode = ERR_PTR(-ENOENT);
 248         } else {
 249                 if (id->oii_gen == OSD_OII_NOGEN)
 250                         osd_id_gen(id, inode->i_ino, inode->i_generation);
 251
 252                 /* Do not update file c/mtime in ldiskfs.
 253                  * NB: we don't have any lock to protect this because we don't
 254                  * have reference on osd_object now, but contention with
 255                  * another lookup + attr_set can't happen in the tiny window
 256                  * between if (...) and set S_NOCMTIME. */
 257                 if (!(inode->i_flags & S_NOCMTIME))
 258                         inode->i_flags |= S_NOCMTIME;
 259         }
 260         return inode;
 261 }
 262
 263 static struct inode *
 264 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
 265              struct osd_inode_id *id, struct lu_fid *fid)
 266 {
 267         struct lustre_mdt_attrs *lma   = &info->oti_mdt_attrs;
 268         struct inode            *inode;
 269         int                      rc;
 270
 271         inode = osd_iget(info, dev, id);
 272         if (IS_ERR(inode))
 273                 return inode;
 274
 275         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
 276         if (rc == 0) {
 277                 *fid = lma->lma_self_fid;
 278         } else if (rc == -ENODATA) {
 279                 if (unlikely(inode == osd_sb(dev)->s_root->d_inode))
 280                         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
 281                 else
 282                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 283         } else {
 284                 iput(inode);
 285                 inode = ERR_PTR(rc);
 286         }
 287         return inode;
 288 }
 289
 290 static struct inode *osd_iget_check(struct osd_thread_info *info,
 291                                     struct osd_device *dev,
 292                                     const struct lu_fid *fid,
 293                                     struct osd_inode_id *id,
 294                                     bool in_oi)
 295 {
 296         struct inode    *inode;
 297         int              rc     = 0;
 298         ENTRY;
 299
 300         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
 301         if (IS_ERR(inode)) {
 302                 rc = PTR_ERR(inode);
 303                 if (!in_oi || (rc != -ENOENT && rc != -ESTALE)) {
 304                         CDEBUG(D_INODE, "no inode: ino = %u, rc = %d\n",
 305                                id->oii_ino, rc);
 306
 307                         GOTO(put, rc);
 308                 }
 309
 310                 goto check_oi;
 311         }
 312
 313         if (is_bad_inode(inode)) {
 314                 rc = -ENOENT;
 315                 if (!in_oi) {
 316                         CDEBUG(D_INODE, "bad inode: ino = %u\n", id->oii_ino);
 317
 318                         GOTO(put, rc);
 319                 }
 320
 321                 goto check_oi;
 322         }
 323
 324         if (id->oii_gen != OSD_OII_NOGEN &&
 325             inode->i_generation != id->oii_gen) {
 326                 rc = -ESTALE;
 327                 if (!in_oi) {
 328                         CDEBUG(D_INODE, "unmatched inode: ino = %u, "
 329                                "oii_gen = %u, i_generation = %u\n",
 330                                id->oii_ino, id->oii_gen, inode->i_generation);
 331
 332                         GOTO(put, rc);
 333                 }
 334
 335                 goto check_oi;
 336         }
 337
 338         if (inode->i_nlink == 0) {
 339                 rc = -ENOENT;
 340                 if (!in_oi) {
 341                         CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
 342
 343                         GOTO(put, rc);
 344                 }
 345
 346                 goto check_oi;
 347         }
 348
 349 check_oi:
 350         if (rc != 0) {
 351                 LASSERTF(rc == -ESTALE || rc == -ENOENT, "rc = %d\n", rc);
 352
 353                 rc = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
 354                 /* XXX: There are some possible cases:
 355                  *      1. rc = 0.
 356                  *         Backup/restore caused the OI invalid.
 357                  *      2. rc = 0.
 358                  *         Someone unlinked the object but NOT removed
 359                  *         the OI mapping, such as mount target device
 360                  *         as ldiskfs, and modify something directly.
 361                  *      3. rc = -ENOENT.
 362                  *         Someone just removed the object between the
 363                  *         former oi_lookup and the iget. It is normal.
 364                  *      4. Other failure cases.
 365                  *
 366                  *      Generally, when the device is mounted, it will
 367                  *      auto check whether the system is restored from
 368                  *      file-level backup or not. We trust such detect
 369                  *      to distinguish the 1st case from the 2nd case. */
 370                 if (rc == 0) {
 371                         if (!IS_ERR(inode) && inode->i_generation != 0 &&
 372                             inode->i_generation == id->oii_gen)
 373                                 rc = -ENOENT;
 374                         else
 375                                 rc = -EREMCHG;
 376                 }
 377         } else {
 378                 if (id->oii_gen == OSD_OII_NOGEN)
 379                         osd_id_gen(id, inode->i_ino, inode->i_generation);
 380
 381                 /* Do not update file c/mtime in ldiskfs.
 382                  * NB: we don't have any lock to protect this because we don't
 383                  * have reference on osd_object now, but contention with
 384                  * another lookup + attr_set can't happen in the tiny window
 385                  * between if (...) and set S_NOCMTIME. */
 386                 if (!(inode->i_flags & S_NOCMTIME))
 387                         inode->i_flags |= S_NOCMTIME;
 388         }
 389
 390         GOTO(put, rc);
 391
 392 put:
 393         if (rc != 0) {
 394                 if (!IS_ERR(inode))
 395                         iput(inode);
 396
 397                 inode = ERR_PTR(rc);
 398         }
 399
 400         return inode;
 401 }
 402
 403 /**
 404  * \retval +v: new filter_fid, does not contain self-fid
 405  * \retval 0:  filter_fid_old, contains self-fid
 406  * \retval -v: other failure cases
 407  */
 408 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
 409                  struct dentry *dentry, struct lu_fid *fid)
 410 {
 411         struct filter_fid_old   *ff     = &info->oti_ff;
 412         struct ost_id           *ostid  = &info->oti_ostid;
 413         int                      rc;
 414
 415         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
 416         if (rc == sizeof(*ff)) {
 417                 rc = 0;
 418                 ostid_set_seq(ostid, le64_to_cpu(ff->ff_seq));
 419                 ostid_set_id(ostid, le64_to_cpu(ff->ff_objid));
 420                 /* XXX: should use real OST index in the future. LU-3569 */
 421                 ostid_to_fid(fid, ostid, 0);
 422         } else if (rc == sizeof(struct filter_fid)) {
 423                 rc = 1;
 424         } else if (rc >= 0) {
 425                 rc = -EINVAL;
 426         }
 427
 428         return rc;
 429 }
 430
 431 static int osd_lma_self_repair(struct osd_thread_info *info,
 432                                struct osd_device *osd, struct inode *inode,
 433                                const struct lu_fid *fid, __u32 compat)
 434 {
 435         handle_t *jh;
 436         int       rc;
 437
 438         LASSERT(current->journal_info == NULL);
 439
 440         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
 441                                   osd_dto_credits_noquota[DTO_XATTR_SET]);
 442         if (IS_ERR(jh)) {
 443                 rc = PTR_ERR(jh);
 444                 CWARN("%s: cannot start journal for lma_self_repair: rc = %d\n",
 445                       osd_name(osd), rc);
 446                 return rc;
 447         }
 448
 449         rc = osd_ea_fid_set(info, inode, fid, compat, 0);
 450         if (rc != 0)
 451                 CWARN("%s: cannot self repair the LMA: rc = %d\n",
 452                       osd_name(osd), rc);
 453         ldiskfs_journal_stop(jh);
 454         return rc;
 455 }
 456
 457 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
 458 {
 459         struct osd_thread_info  *info   = osd_oti_get(env);
 460         struct osd_device       *osd    = osd_obj2dev(obj);
 461         struct lustre_mdt_attrs *lma    = &info->oti_mdt_attrs;
 462         struct inode            *inode  = obj->oo_inode;
 463         struct dentry           *dentry = &info->oti_obj_dentry;
 464         struct lu_fid           *fid    = NULL;
 465         const struct lu_fid     *rfid   = lu_object_fid(&obj->oo_dt.do_lu);
 466         int                      rc;
 467         ENTRY;
 468
 469         CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
 470         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 471                              info->oti_mdt_attrs_old, LMA_OLD_SIZE);
 472         if (rc == -ENODATA && !fid_is_igif(rfid) && osd->od_check_ff) {
 473                 fid = &lma->lma_self_fid;
 474                 rc = osd_get_idif(info, inode, dentry, fid);
 475                 if ((rc > 0) || (rc == -ENODATA && osd->od_lma_self_repair)) {
 476                         /* For the given OST-object, if it has neither LMA nor
 477                          * FID in XATTR_NAME_FID, then the given FID (which is
 478                          * contained in the @obj, from client RPC for locating
 479                          * the OST-object) is trusted. We use it to generate
 480                          * the LMA. */
 481                         osd_lma_self_repair(info, osd, inode, rfid,
 482                                 fid_is_on_ost(info, osd, fid, OI_CHECK_FLD) ?
 483                                 LMAC_FID_ON_OST : 0);
 484                         RETURN(0);
 485                 }
 486         }
 487
 488         if (unlikely(rc == -ENODATA))
 489                 RETURN(0);
 490
 491         if (rc < 0)
 492                 RETURN(rc);
 493
 494         if (rc > 0) {
 495                 rc = 0;
 496                 lustre_lma_swab(lma);
 497                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
 498                              CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT))) {
 499                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
 500                               "fid = "DFID", ino = %lu\n", osd_name(osd),
 501                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 502                               PFID(rfid), inode->i_ino);
 503                         rc = -EOPNOTSUPP;
 504                 } else if (!(lma->lma_compat & LMAC_NOT_IN_OI)) {
 505                         fid = &lma->lma_self_fid;
 506                 }
 507         }
 508
 509         if (fid != NULL && unlikely(!lu_fid_eq(rfid, fid))) {
 510                 if (fid_is_idif(rfid) && fid_is_idif(fid)) {
 511                         struct ost_id   *oi   = &info->oti_ostid;
 512                         struct lu_fid   *fid1 = &info->oti_fid3;
 513                         __u32            idx  = fid_idif_ost_idx(rfid);
 514
 515                         /* For old IDIF, the OST index is not part of the IDIF,
 516                          * Means that different OSTs may have the same IDIFs.
 517                          * Under such case, we need to make some compatible
 518                          * check to make sure to trigger OI scrub properly. */
 519                         if (idx != 0 && fid_idif_ost_idx(fid) == 0) {
 520                                 /* Given @rfid is new, LMA is old. */
 521                                 fid_to_ostid(fid, oi);
 522                                 ostid_to_fid(fid1, oi, idx);
 523                                 if (lu_fid_eq(fid1, rfid)) {
 524                                         if (osd->od_lma_self_repair)
 525                                                 osd_lma_self_repair(info, osd,
 526                                                         inode, rfid,
 527                                                         LMAC_FID_ON_OST);
 528                                         RETURN(0);
 529                                 }
 530                         }
 531                 }
 532
 533                 CDEBUG(D_INODE, "%s: FID "DFID" != self_fid "DFID"\n",
 534                        osd_name(osd), PFID(rfid), PFID(fid));
 535                 rc = -EREMCHG;
 536         }
 537
 538         RETURN(rc);
 539 }
 540
 541 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
 542                           const struct lu_fid *fid,
 543                           const struct lu_object_conf *conf)
 544 {
 545         struct osd_thread_info *info;
 546         struct lu_device       *ldev   = obj->oo_dt.do_lu.lo_dev;
 547         struct osd_device      *dev;
 548         struct osd_idmap_cache *oic;
 549         struct osd_inode_id    *id;
 550         struct inode           *inode;
 551         struct osd_scrub       *scrub;
 552         struct scrub_file      *sf;
 553         int                     result;
 554         int                     saved  = 0;
 555         bool                    in_oi  = false;
 556         bool                    triggered = false;
 557         ENTRY;
 558
 559         LINVRNT(osd_invariant(obj));
 560         LASSERT(obj->oo_inode == NULL);
 561         LASSERTF(fid_is_sane(fid) || fid_is_idif(fid), DFID"\n", PFID(fid));
 562
 563         dev = osd_dev(ldev);
 564         scrub = &dev->od_scrub;
 565         sf = &scrub->os_file;
 566         info = osd_oti_get(env);
 567         LASSERT(info);
 568         oic = &info->oti_cache;
 569
 570         if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
 571                 RETURN(-ENOENT);
 572
 573         /* For the object is created as locking anchor, or for the object to
 574          * be created on disk. No need to osd_oi_lookup() at here because FID
 575          * shouldn't never be re-used, if it's really a duplicate FID from
 576          * unexpected reason, we should be able to detect it later by calling
 577          * do_create->osd_oi_insert(). */
 578         if (conf != NULL && conf->loc_flags & LOC_F_NEW)
 579                 GOTO(out, result = 0);
 580
 581         /* Search order: 1. per-thread cache. */
 582         if (lu_fid_eq(fid, &oic->oic_fid) &&
 583             likely(oic->oic_dev == dev)) {
 584                 id = &oic->oic_lid;
 585                 goto iget;
 586         }
 587
 588         id = &info->oti_id;
 589         if (!list_empty(&scrub->os_inconsistent_items)) {
 590                 /* Search order: 2. OI scrub pending list. */
 591                 result = osd_oii_lookup(dev, fid, id);
 592                 if (result == 0)
 593                         goto iget;
 594         }
 595
 596         /* Search order: 3. OI files. */
 597         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
 598         if (result == -ENOENT) {
 599                 if (!fid_is_norm(fid) ||
 600                     fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
 601                     !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
 602                                       sf->sf_oi_bitmap))
 603                         GOTO(out, result = 0);
 604
 605                 goto trigger;
 606         }
 607
 608         if (result != 0)
 609                 GOTO(out, result);
 610
 611         in_oi = true;
 612
 613 iget:
 614         inode = osd_iget_check(info, dev, fid, id, in_oi);
 615         if (IS_ERR(inode)) {
 616                 result = PTR_ERR(inode);
 617                 if (result == -ENOENT || result == -ESTALE) {
 618                         if (!in_oi)
 619                                 fid_zero(&oic->oic_fid);
 620
 621                         GOTO(out, result = -ENOENT);
 622                 } else if (result == -EREMCHG) {
 623
 624 trigger:
 625                         if (!in_oi)
 626                                 fid_zero(&oic->oic_fid);
 627
 628                         if (unlikely(triggered))
 629                                 GOTO(out, result = saved);
 630
 631                         triggered = true;
 632                         if (thread_is_running(&scrub->os_thread)) {
 633                                 result = -EINPROGRESS;
 634                         } else if (!dev->od_noscrub) {
 635                                 result = osd_scrub_start(dev);
 636                                 LCONSOLE_WARN("%.16s: trigger OI scrub by RPC "
 637                                               "for "DFID", rc = %d [1]\n",
 638                                               osd_name(dev), PFID(fid),result);
 639                                 if (result == 0 || result == -EALREADY)
 640                                         result = -EINPROGRESS;
 641                                 else
 642                                         result = -EREMCHG;
 643                         }
 644
 645                         /* We still have chance to get the valid inode: for the
 646                          * object which is referenced by remote name entry, the
 647                          * object on the local MDT will be linked under the dir
 648                          * of "/REMOTE_PARENT_DIR" with its FID string as name.
 649                          *
 650                          * We do not know whether the object for the given FID
 651                          * is referenced by some remote name entry or not, and
 652                          * especially for DNE II, a multiple-linked object may
 653                          * have many name entries reside on many MDTs.
 654                          *
 655                          * To simplify the operation, OSD will not distinguish
 656                          * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
 657                          * only happened for the RPC from other MDT during the
 658                          * OI scrub, or for the client side RPC with FID only,
 659                          * such as FID to path, or from old connected client. */
 660                         saved = result;
 661                         result = osd_lookup_in_remote_parent(info, dev,
 662                                                              fid, id);
 663                         if (result == 0) {
 664                                 in_oi = false;
 665                                 goto iget;
 666                         }
 667
 668                         result = saved;
 669                 }
 670
 671                 GOTO(out, result);
 672         }
 673
 674         obj->oo_inode = inode;
 675         LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
 676
 677         result = osd_check_lma(env, obj);
 678         if (result != 0) {
 679                 iput(inode);
 680                 obj->oo_inode = NULL;
 681                 if (result == -EREMCHG) {
 682                         if (!in_oi) {
 683                                 result = osd_oi_lookup(info, dev, fid, id,
 684                                                        OI_CHECK_FLD);
 685                                 if (result != 0) {
 686                                         fid_zero(&oic->oic_fid);
 687                                         GOTO(out, result);
 688                                 }
 689                         }
 690
 691                         goto trigger;
 692                 }
 693
 694                 GOTO(out, result);
 695         }
 696
 697         obj->oo_compat_dot_created = 1;
 698         obj->oo_compat_dotdot_created = 1;
 699
 700         if (!S_ISDIR(inode->i_mode) || !ldiskfs_pdo) /* done */
 701                 GOTO(out, result = 0);
 702
 703         LASSERT(obj->oo_hl_head == NULL);
 704         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
 705         if (obj->oo_hl_head == NULL) {
 706                 obj->oo_inode = NULL;
 707                 iput(inode);
 708                 GOTO(out, result = -ENOMEM);
 709         }
 710         GOTO(out, result = 0);
 711
 712 out:
 713         LINVRNT(osd_invariant(obj));
 714         return result;
 715 }
 716
 717 /*
 718  * Concurrency: shouldn't matter.
 719  */
 720 static void osd_object_init0(struct osd_object *obj)
 721 {
 722         LASSERT(obj->oo_inode != NULL);
 723         obj->oo_dt.do_body_ops = &osd_body_ops;
 724         obj->oo_dt.do_lu.lo_header->loh_attr |=
 725                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
 726 }
 727
 728 /*
 729  * Concurrency: no concurrent access is possible that early in object
 730  * life-cycle.
 731  */
 732 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
 733                            const struct lu_object_conf *conf)
 734 {
 735         struct osd_object *obj = osd_obj(l);
 736         int result;
 737
 738         LINVRNT(osd_invariant(obj));
 739
 740         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
 741                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
 742                 l->lo_header->loh_attr |= LOHA_EXISTS;
 743                 return 0;
 744         }
 745
 746         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
 747         obj->oo_dt.do_body_ops = &osd_body_ops_new;
 748         if (result == 0 && obj->oo_inode != NULL)
 749                 osd_object_init0(obj);
 750
 751         LINVRNT(osd_invariant(obj));
 752         return result;
 753 }
 754
 755 /*
 756  * Concurrency: no concurrent access is possible that late in object
 757  * life-cycle.
 758  */
 759 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
 760 {
 761         struct osd_object *obj = osd_obj(l);
 762
 763         LINVRNT(osd_invariant(obj));
 764
 765         dt_object_fini(&obj->oo_dt);
 766         if (obj->oo_hl_head != NULL)
 767                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
 768         OBD_FREE_PTR(obj);
 769 }
 770
 771 /*
 772  * Concurrency: no concurrent access is possible that late in object
 773  * life-cycle.
 774  */
 775 static void osd_index_fini(struct osd_object *o)
 776 {
 777         struct iam_container *bag;
 778
 779         if (o->oo_dir != NULL) {
 780                 bag = &o->oo_dir->od_container;
 781                 if (o->oo_inode != NULL) {
 782                         if (bag->ic_object == o->oo_inode)
 783                                 iam_container_fini(bag);
 784                 }
 785                 OBD_FREE_PTR(o->oo_dir);
 786                 o->oo_dir = NULL;
 787         }
 788 }
 789
 790 /*
 791  * Concurrency: no concurrent access is possible that late in object
 792  * life-cycle (for all existing callers, that is. New callers have to provide
 793  * their own locking.)
 794  */
 795 static int osd_inode_unlinked(const struct inode *inode)
 796 {
 797         return inode->i_nlink == 0;
 798 }
 799
 800 enum {
 801         OSD_TXN_OI_DELETE_CREDITS    = 20,
 802         OSD_TXN_INODE_DELETE_CREDITS = 20
 803 };
 804
 805 /*
 806  * Journal
 807  */
 808
 809 #if OSD_THANDLE_STATS
 810 /**
 811  * Set time when the handle is allocated
 812  */
 813 static void osd_th_alloced(struct osd_thandle *oth)
 814 {
 815         oth->oth_alloced = cfs_time_current();
 816 }
 817
 818 /**
 819  * Set time when the handle started
 820  */
 821 static void osd_th_started(struct osd_thandle *oth)
 822 {
 823         oth->oth_started = cfs_time_current();
 824 }
 825
 826 /**
 827  * Helper function to convert time interval to microseconds packed in
 828  * long int.
 829  */
 830 static long interval_to_usec(cfs_time_t start, cfs_time_t end)
 831 {
 832         struct timeval val;
 833
 834         cfs_duration_usec(cfs_time_sub(end, start), &val);
 835         return val.tv_sec * 1000000 + val.tv_usec;
 836 }
 837
 838 /**
 839  * Check whether the we deal with this handle for too long.
 840  */
 841 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
 842                                 cfs_time_t alloced, cfs_time_t started,
 843                                 cfs_time_t closed)
 844 {
 845         cfs_time_t now = cfs_time_current();
 846
 847         LASSERT(dev != NULL);
 848
 849         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
 850                             interval_to_usec(alloced, started));
 851         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
 852                             interval_to_usec(started, closed));
 853         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
 854                             interval_to_usec(closed, now));
 855
 856         if (cfs_time_before(cfs_time_add(alloced, cfs_time_seconds(30)), now)) {
 857                 CWARN("transaction handle %p was open for too long: "
 858                       "now "CFS_TIME_T" ,"
 859                       "alloced "CFS_TIME_T" ,"
 860                       "started "CFS_TIME_T" ,"
 861                       "closed "CFS_TIME_T"\n",
 862                       oth, now, alloced, started, closed);
 863                 libcfs_debug_dumpstack(NULL);
 864         }
 865 }
 866
 867 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
 868 {                                                                       \
 869         cfs_time_t __closed = cfs_time_current();                       \
 870         cfs_time_t __alloced = oth->oth_alloced;                        \
 871         cfs_time_t __started = oth->oth_started;                        \
 872                                                                         \
 873         expr;                                                           \
 874         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
 875 }
 876
 877 #else /* OSD_THANDLE_STATS */
 878
 879 #define osd_th_alloced(h)                  do {} while(0)
 880 #define osd_th_started(h)                  do {} while(0)
 881 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
 882
 883 #endif /* OSD_THANDLE_STATS */
 884
 885 /*
 886  * Concurrency: doesn't access mutable data.
 887  */
 888 static int osd_param_is_not_sane(const struct osd_device *dev,
 889                                  const struct thandle *th)
 890 {
 891         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
 892
 893         return oh->ot_credits > osd_journal(dev)->j_max_transaction_buffers;
 894 }
 895
 896 /*
 897  * Concurrency: shouldn't matter.
 898  */
 899 static void osd_trans_commit_cb(struct super_block *sb,
 900                                 struct ldiskfs_journal_cb_entry *jcb, int error)
 901 {
 902         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
 903         struct thandle     *th  = &oh->ot_super;
 904         struct lu_device   *lud = &th->th_dev->dd_lu_dev;
 905         struct dt_txn_commit_cb *dcb, *tmp;
 906
 907         LASSERT(oh->ot_handle == NULL);
 908
 909         if (error)
 910                 CERROR("transaction @0x%p commit error: %d\n", th, error);
 911
 912         dt_txn_hook_commit(th);
 913
 914         /* call per-transaction callbacks if any */
 915         list_for_each_entry_safe(dcb, tmp, &oh->ot_dcb_list, dcb_linkage) {
 916                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
 917                          "commit callback entry: magic=%x name='%s'\n",
 918                          dcb->dcb_magic, dcb->dcb_name);
 919                 list_del_init(&dcb->dcb_linkage);
 920                 dcb->dcb_func(NULL, th, dcb, error);
 921         }
 922
 923         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
 924         lu_device_put(lud);
 925         th->th_dev = NULL;
 926
 927         lu_context_exit(&th->th_ctx);
 928         lu_context_fini(&th->th_ctx);
 929         thandle_put(th);
 930 }
 931
 932 static struct thandle *osd_trans_create(const struct lu_env *env,
 933                                         struct dt_device *d)
 934 {
 935         struct osd_thread_info  *oti = osd_oti_get(env);
 936         struct osd_iobuf        *iobuf = &oti->oti_iobuf;
 937         struct osd_thandle      *oh;
 938         struct thandle          *th;
 939         ENTRY;
 940
 941         /* on pending IO in this thread should left from prev. request */
 942         LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
 943
 944         th = ERR_PTR(-ENOMEM);
 945         OBD_ALLOC_GFP(oh, sizeof *oh, GFP_NOFS);
 946         if (oh != NULL) {
 947                 oh->ot_quota_trans = &oti->oti_quota_trans;
 948                 memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
 949                 th = &oh->ot_super;
 950                 th->th_dev = d;
 951                 th->th_result = 0;
 952                 th->th_tags = LCT_TX_HANDLE;
 953                 oh->ot_credits = 0;
 954                 atomic_set(&th->th_refc, 1);
 955                 th->th_alloc_size = sizeof(*oh);
 956                 oti->oti_dev = osd_dt_dev(d);
 957                 INIT_LIST_HEAD(&oh->ot_dcb_list);
 958                 osd_th_alloced(oh);
 959
 960                 memset(oti->oti_declare_ops, 0,
 961                                         sizeof(oti->oti_declare_ops));
 962                 memset(oti->oti_declare_ops_rb, 0,
 963                                         sizeof(oti->oti_declare_ops_rb));
 964                 memset(oti->oti_declare_ops_cred, 0,
 965                                         sizeof(oti->oti_declare_ops_cred));
 966                 oti->oti_rollback = false;
 967         }
 968         RETURN(th);
 969 }
 970
 971 /*
 972  * Concurrency: shouldn't matter.
 973  */
 974 int osd_trans_start(const struct lu_env *env, struct dt_device *d,
 975                     struct thandle *th)
 976 {
 977         struct osd_thread_info *oti = osd_oti_get(env);
 978         struct osd_device  *dev = osd_dt_dev(d);
 979         handle_t           *jh;
 980         struct osd_thandle *oh;
 981         int rc;
 982
 983         ENTRY;
 984
 985         LASSERT(current->journal_info == NULL);
 986
 987         oh = container_of0(th, struct osd_thandle, ot_super);
 988         LASSERT(oh != NULL);
 989         LASSERT(oh->ot_handle == NULL);
 990
 991         rc = dt_txn_hook_start(env, d, th);
 992         if (rc != 0)
 993                 GOTO(out, rc);
 994
 995         if (unlikely(osd_param_is_not_sane(dev, th))) {
 996                 static unsigned long last_printed;
 997                 static int last_credits;
 998
 999                 CWARN("%.16s: too many transaction credits (%d > %d)\n",
1000                       LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
1001                       oh->ot_credits,
1002                       osd_journal(dev)->j_max_transaction_buffers);
1003                 CWARN("  create: %u/%u, destroy: %u/%u\n",
1004                       oti->oti_declare_ops[OSD_OT_CREATE],
1005                       oti->oti_declare_ops_cred[OSD_OT_CREATE],
1006                       oti->oti_declare_ops[OSD_OT_DESTROY],
1007                       oti->oti_declare_ops_cred[OSD_OT_DESTROY]);
1008                 CWARN("  attr_set: %u/%u, xattr_set: %u/%u\n",
1009                       oti->oti_declare_ops[OSD_OT_ATTR_SET],
1010                       oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
1011                       oti->oti_declare_ops[OSD_OT_XATTR_SET],
1012                       oti->oti_declare_ops_cred[OSD_OT_XATTR_SET]);
1013                 CWARN("  write: %u/%u, punch: %u/%u, quota %u/%u\n",
1014                       oti->oti_declare_ops[OSD_OT_WRITE],
1015                       oti->oti_declare_ops_cred[OSD_OT_WRITE],
1016                       oti->oti_declare_ops[OSD_OT_PUNCH],
1017                       oti->oti_declare_ops_cred[OSD_OT_PUNCH],
1018                       oti->oti_declare_ops[OSD_OT_QUOTA],
1019                       oti->oti_declare_ops_cred[OSD_OT_QUOTA]);
1020                 CWARN("  insert: %u/%u, delete: %u/%u\n",
1021                       oti->oti_declare_ops[OSD_OT_INSERT],
1022                       oti->oti_declare_ops_cred[OSD_OT_INSERT],
1023                       oti->oti_declare_ops[OSD_OT_DELETE],
1024                       oti->oti_declare_ops_cred[OSD_OT_DELETE]);
1025                 CWARN("  ref_add: %u/%u, ref_del: %u/%u\n",
1026                       oti->oti_declare_ops[OSD_OT_REF_ADD],
1027                       oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
1028                       oti->oti_declare_ops[OSD_OT_REF_DEL],
1029                       oti->oti_declare_ops_cred[OSD_OT_REF_DEL]);
1030
1031                 if (last_credits != oh->ot_credits &&
1032                     time_after(jiffies, last_printed + 60 * HZ)) {
1033                         libcfs_debug_dumpstack(NULL);
1034                         last_credits = oh->ot_credits;
1035                         last_printed = jiffies;
1036                 }
1037                 /* XXX Limit the credits to 'max_transaction_buffers', and
1038                  *     let the underlying filesystem to catch the error if
1039                  *     we really need so many credits.
1040                  *
1041                  *     This should be removed when we can calculate the
1042                  *     credits precisely. */
1043                 oh->ot_credits = osd_journal(dev)->j_max_transaction_buffers;
1044         }
1045
1046         /*
1047          * XXX temporary stuff. Some abstraction layer should
1048          * be used.
1049          */
1050         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
1051         osd_th_started(oh);
1052         if (!IS_ERR(jh)) {
1053                 oh->ot_handle = jh;
1054                 LASSERT(oti->oti_txns == 0);
1055                 lu_context_init(&th->th_ctx, th->th_tags);
1056                 lu_context_enter(&th->th_ctx);
1057
1058                 lu_device_get(&d->dd_lu_dev);
1059                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
1060                               "osd-tx", th);
1061                 oti->oti_txns++;
1062                 rc = 0;
1063         } else {
1064                 rc = PTR_ERR(jh);
1065         }
1066 out:
1067         RETURN(rc);
1068 }
1069
1070 static int osd_seq_exists(const struct lu_env *env,
1071                               struct osd_device *osd, obd_seq seq)
1072 {
1073         struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
1074         struct seq_server_site  *ss = osd_seq_site(osd);
1075         int                     rc;
1076         ENTRY;
1077
1078         LASSERT(ss != NULL);
1079         LASSERT(ss->ss_server_fld != NULL);
1080
1081         rc = osd_fld_lookup(env, osd, seq, range);
1082         if (rc != 0) {
1083                 if (rc != -ENOENT)
1084                         CERROR("%s: can't lookup FLD sequence "LPX64
1085                                ": rc = %d\n", osd_name(osd), seq, rc);
1086                 RETURN(0);
1087         }
1088
1089         RETURN(ss->ss_node_id == range->lsr_index);
1090 }
1091
1092 /*
1093  * Concurrency: shouldn't matter.
1094  */
1095 static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
1096                           struct thandle *th)
1097 {
1098         int                     rc = 0;
1099         struct osd_thandle     *oh;
1100         struct osd_thread_info *oti = osd_oti_get(env);
1101         struct osd_iobuf       *iobuf = &oti->oti_iobuf;
1102         struct qsd_instance    *qsd = oti->oti_dev->od_quota_slave;
1103         struct lquota_trans    *qtrans;
1104         ENTRY;
1105
1106         oh = container_of0(th, struct osd_thandle, ot_super);
1107
1108         qtrans = oh->ot_quota_trans;
1109         oh->ot_quota_trans = NULL;
1110
1111         if (oh->ot_handle != NULL) {
1112                 handle_t *hdl = oh->ot_handle;
1113
1114                 /*
1115                  * add commit callback
1116                  * notice we don't do this in osd_trans_start()
1117                  * as underlying transaction can change during truncate
1118                  */
1119                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
1120                                          &oh->ot_jcb);
1121
1122                 LASSERT(oti->oti_txns == 1);
1123                 oti->oti_txns--;
1124                 rc = dt_txn_hook_stop(env, th);
1125                 if (rc != 0)
1126                         CERROR("Failure in transaction hook: %d\n", rc);
1127
1128                 /* hook functions might modify th_sync */
1129                 hdl->h_sync = th->th_sync;
1130
1131                 oh->ot_handle = NULL;
1132                 OSD_CHECK_SLOW_TH(oh, oti->oti_dev,
1133                                   rc = ldiskfs_journal_stop(hdl));
1134                 if (rc != 0)
1135                         CERROR("Failure to stop transaction: %d\n", rc);
1136         } else {
1137                 thandle_put(&oh->ot_super);
1138         }
1139
1140         /* inform the quota slave device that the transaction is stopping */
1141         qsd_op_end(env, qsd, qtrans);
1142
1143         /* as we want IO to journal and data IO be concurrent, we don't block
1144          * awaiting data IO completion in osd_do_bio(), instead we wait here
1145          * once transaction is submitted to the journal. all reqular requests
1146          * don't do direct IO (except read/write), thus this wait_event becomes
1147          * no-op for them.
1148          *
1149          * IMPORTANT: we have to wait till any IO submited by the thread is
1150          * completed otherwise iobuf may be corrupted by different request
1151          */
1152         wait_event(iobuf->dr_wait,
1153                        atomic_read(&iobuf->dr_numreqs) == 0);
1154         osd_fini_iobuf(oti->oti_dev, iobuf);
1155         if (!rc)
1156                 rc = iobuf->dr_error;
1157
1158         RETURN(rc);
1159 }
1160
1161 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
1162 {
1163         struct osd_thandle *oh = container_of0(th, struct osd_thandle,
1164                                                ot_super);
1165
1166         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
1167         LASSERT(&dcb->dcb_func != NULL);
1168         list_add(&dcb->dcb_linkage, &oh->ot_dcb_list);
1169
1170         return 0;
1171 }
1172
1173 /*
1174  * Called just before object is freed. Releases all resources except for
1175  * object itself (that is released by osd_object_free()).
1176  *
1177  * Concurrency: no concurrent access is possible that late in object
1178  * life-cycle.
1179  */
1180 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
1181 {
1182         struct osd_object *obj   = osd_obj(l);
1183         struct inode      *inode = obj->oo_inode;
1184
1185         LINVRNT(osd_invariant(obj));
1186
1187         /*
1188          * If object is unlinked remove fid->ino mapping from object index.
1189          */
1190
1191         osd_index_fini(obj);
1192         if (inode != NULL) {
1193                 struct qsd_instance     *qsd = osd_obj2dev(obj)->od_quota_slave;
1194                 qid_t                    uid = i_uid_read(inode);
1195                 qid_t                    gid = i_gid_read(inode);
1196
1197                 iput(inode);
1198                 obj->oo_inode = NULL;
1199
1200                 if (qsd != NULL) {
1201                         struct osd_thread_info  *info = osd_oti_get(env);
1202                         struct lquota_id_info   *qi = &info->oti_qi;
1203
1204                         /* Release granted quota to master if necessary */
1205                         qi->lqi_id.qid_uid = uid;
1206                         qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
1207
1208                         qi->lqi_id.qid_uid = gid;
1209                         qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
1210                 }
1211         }
1212 }
1213
1214 /*
1215  * Concurrency: ->loo_object_release() is called under site spin-lock.
1216  */
1217 static void osd_object_release(const struct lu_env *env,
1218                                struct lu_object *l)
1219 {
1220 }
1221
1222 /*
1223  * Concurrency: shouldn't matter.
1224  */
1225 static int osd_object_print(const struct lu_env *env, void *cookie,
1226                             lu_printer_t p, const struct lu_object *l)
1227 {
1228         struct osd_object *o = osd_obj(l);
1229         struct iam_descr  *d;
1230
1231         if (o->oo_dir != NULL)
1232                 d = o->oo_dir->od_container.ic_descr;
1233         else
1234                 d = NULL;
1235         return (*p)(env, cookie,
1236                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
1237                     o, o->oo_inode,
1238                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
1239                     o->oo_inode ? o->oo_inode->i_generation : 0,
1240                     d ? d->id_ops->id_name : "plain");
1241 }
1242
1243 #define GRANT_FOR_LOCAL_OIDS 32 /* 128kB for last_rcvd, quota files, ... */
1244
1245 /*
1246  * Concurrency: shouldn't matter.
1247  */
1248 int osd_statfs(const struct lu_env *env, struct dt_device *d,
1249                struct obd_statfs *sfs)
1250 {
1251         struct osd_device  *osd = osd_dt_dev(d);
1252         struct super_block *sb = osd_sb(osd);
1253         struct kstatfs     *ksfs;
1254         int result = 0;
1255
1256         if (unlikely(osd->od_mnt == NULL))
1257                 return -EINPROGRESS;
1258
1259         /* osd_lproc.c call this without env, allocate ksfs for that case */
1260         if (unlikely(env == NULL)) {
1261                 OBD_ALLOC_PTR(ksfs);
1262                 if (ksfs == NULL)
1263                         return -ENOMEM;
1264         } else {
1265                 ksfs = &osd_oti_get(env)->oti_ksfs;
1266         }
1267
1268         spin_lock(&osd->od_osfs_lock);
1269         result = sb->s_op->statfs(sb->s_root, ksfs);
1270         if (likely(result == 0)) { /* N.B. statfs can't really fail */
1271                 statfs_pack(sfs, ksfs);
1272                 if (sb->s_flags & MS_RDONLY)
1273                         sfs->os_state = OS_STATE_READONLY;
1274         }
1275
1276         spin_unlock(&osd->od_osfs_lock);
1277
1278         if (unlikely(env == NULL))
1279                 OBD_FREE_PTR(ksfs);
1280
1281         /* Reserve a small amount of space for local objects like last_rcvd,
1282          * llog, quota files, ... */
1283         if (sfs->os_bavail <= GRANT_FOR_LOCAL_OIDS) {
1284                 sfs->os_bavail = 0;
1285         } else {
1286                 sfs->os_bavail -= GRANT_FOR_LOCAL_OIDS;
1287                 /** Take out metadata overhead for indirect blocks */
1288                 sfs->os_bavail -= sfs->os_bavail >> (sb->s_blocksize_bits - 3);
1289         }
1290
1291         return result;
1292 }
1293
1294 /**
1295  * Estimate space needed for file creations. We assume the largest filename
1296  * which is 2^64 - 1, hence a filename of 20 chars.
1297  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
1298  */
1299 #ifdef __LDISKFS_DIR_REC_LEN
1300 #define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
1301 #else
1302 #define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
1303 #endif
1304
1305 /*
1306  * Concurrency: doesn't access mutable data.
1307  */
1308 static void osd_conf_get(const struct lu_env *env,
1309                          const struct dt_device *dev,
1310                          struct dt_device_param *param)
1311 {
1312         struct super_block *sb = osd_sb(osd_dt_dev(dev));
1313         int                ea_overhead;
1314
1315         /*
1316          * XXX should be taken from not-yet-existing fs abstraction layer.
1317          */
1318         param->ddp_max_name_len = LDISKFS_NAME_LEN;
1319         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
1320         param->ddp_block_shift  = sb->s_blocksize_bits;
1321         param->ddp_mount_type     = LDD_MT_LDISKFS;
1322         param->ddp_maxbytes       = sb->s_maxbytes;
1323         /* Overhead estimate should be fairly accurate, so we really take a tiny
1324          * error margin which also avoids fragmenting the filesystem too much */
1325         param->ddp_grant_reserved = 2; /* end up to be 1.9% after conversion */
1326         /* inode are statically allocated, so per-inode space consumption
1327          * is the space consumed by the directory entry */
1328         param->ddp_inodespace     = PER_OBJ_USAGE;
1329         /* per-fragment overhead to be used by the client code */
1330         param->ddp_grant_frag     = 6 * LDISKFS_BLOCK_SIZE(sb);
1331         param->ddp_mntopts      = 0;
1332         if (test_opt(sb, XATTR_USER))
1333                 param->ddp_mntopts |= MNTOPT_USERXATTR;
1334         if (test_opt(sb, POSIX_ACL))
1335                 param->ddp_mntopts |= MNTOPT_ACL;
1336
1337         /* LOD might calculate the max stripe count based on max_ea_size,
1338          * so we need take account in the overhead as well,
1339          * xattr_header + magic + xattr_entry_head */
1340         ea_overhead = sizeof(struct ldiskfs_xattr_header) + sizeof(__u32) +
1341                       LDISKFS_XATTR_LEN(XATTR_NAME_MAX_LEN);
1342
1343 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
1344         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EA_INODE))
1345                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE -
1346                                                                 ea_overhead;
1347         else
1348 #endif
1349                 param->ddp_max_ea_size = sb->s_blocksize - ea_overhead;
1350 }
1351
1352 /*
1353  * Concurrency: shouldn't matter.
1354  */
1355 static int osd_sync(const struct lu_env *env, struct dt_device *d)
1356 {
1357         CDEBUG(D_HA, "syncing OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
1358         return ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
1359 }
1360
1361 /**
1362  * Start commit for OSD device.
1363  *
1364  * An implementation of dt_commit_async method for OSD device.
1365  * Asychronously starts underlayng fs sync and thereby a transaction
1366  * commit.
1367  *
1368  * \param env environment
1369  * \param d dt device
1370  *
1371  * \see dt_device_operations
1372  */
1373 static int osd_commit_async(const struct lu_env *env,
1374                             struct dt_device *d)
1375 {
1376         struct super_block *s = osd_sb(osd_dt_dev(d));
1377         ENTRY;
1378
1379         CDEBUG(D_HA, "async commit OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
1380         RETURN(s->s_op->sync_fs(s, 0));
1381 }
1382
1383 /*
1384  * Concurrency: shouldn't matter.
1385  */
1386
1387 static int osd_ro(const struct lu_env *env, struct dt_device *d)
1388 {
1389         struct super_block *sb = osd_sb(osd_dt_dev(d));
1390         struct block_device *dev = sb->s_bdev;
1391 #ifdef HAVE_DEV_SET_RDONLY
1392         struct block_device *jdev = LDISKFS_SB(sb)->journal_bdev;
1393         int rc = 0;
1394 #else
1395         int rc = -EOPNOTSUPP;
1396 #endif
1397         ENTRY;
1398
1399 #ifdef HAVE_DEV_SET_RDONLY
1400         CERROR("*** setting %s read-only ***\n", osd_dt_dev(d)->od_svname);
1401
1402         if (jdev && (jdev != dev)) {
1403                 CDEBUG(D_IOCTL | D_HA, "set journal dev %lx rdonly\n",
1404                        (long)jdev);
1405                 dev_set_rdonly(jdev);
1406         }
1407         CDEBUG(D_IOCTL | D_HA, "set dev %lx rdonly\n", (long)dev);
1408         dev_set_rdonly(dev);
1409 #else
1410         CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
1411                osd_dt_dev(d)->od_svname, (long)dev, rc);
1412 #endif
1413         RETURN(rc);
1414 }
1415
1416 /*
1417  * Concurrency: serialization provided by callers.
1418  */
1419 static int osd_init_capa_ctxt(const struct lu_env *env, struct dt_device *d,
1420                               int mode, unsigned long timeout, __u32 alg,
1421                               struct lustre_capa_key *keys)
1422 {
1423         struct osd_device *dev = osd_dt_dev(d);
1424         ENTRY;
1425
1426         dev->od_fl_capa = mode;
1427         dev->od_capa_timeout = timeout;
1428         dev->od_capa_alg = alg;
1429         dev->od_capa_keys = keys;
1430         RETURN(0);
1431 }
1432
1433 /**
1434  * Note: we do not count into QUOTA here.
1435  * If we mount with --data_journal we may need more.
1436  */
1437 const int osd_dto_credits_noquota[DTO_NR] = {
1438         /**
1439          * Insert.
1440          * INDEX_EXTRA_TRANS_BLOCKS(8) +
1441          * SINGLEDATA_TRANS_BLOCKS(8)
1442          * XXX Note: maybe iam need more, since iam have more level than
1443          *           EXT3 htree.
1444          */
1445         [DTO_INDEX_INSERT]  = 16,
1446         /**
1447          * Delete
1448          * just modify a single entry, probably merge few within a block
1449          */
1450         [DTO_INDEX_DELETE]  = 1,
1451         /**
1452          * Used for OI scrub
1453          */
1454         [DTO_INDEX_UPDATE]  = 16,
1455         /**
1456          * 4(inode, inode bits, groups, GDT)
1457          *   notice: OI updates are counted separately with DTO_INDEX_INSERT
1458          */
1459         [DTO_OBJECT_CREATE] = 4,
1460         /**
1461          * 4(inode, inode bits, groups, GDT)
1462          *   notice: OI updates are counted separately with DTO_INDEX_DELETE
1463          */
1464         [DTO_OBJECT_DELETE] = 4,
1465         /**
1466          * Attr set credits (inode)
1467          */
1468         [DTO_ATTR_SET_BASE] = 1,
1469         /**
1470          * Xattr set. The same as xattr of EXT3.
1471          * DATA_TRANS_BLOCKS(14)
1472          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
1473          * are also counted in. Do not know why?
1474          */
1475         [DTO_XATTR_SET]     = 14,
1476         /**
1477          * credits for inode change during write.
1478          */
1479         [DTO_WRITE_BASE]    = 3,
1480         /**
1481          * credits for single block write.
1482          */
1483         [DTO_WRITE_BLOCK]   = 14,
1484         /**
1485          * Attr set credits for chown.
1486          * This is extra credits for setattr, and it is null without quota
1487          */
1488         [DTO_ATTR_SET_CHOWN] = 0
1489 };
1490
1491 static const struct dt_device_operations osd_dt_ops = {
1492         .dt_root_get       = osd_root_get,
1493         .dt_statfs         = osd_statfs,
1494         .dt_trans_create   = osd_trans_create,
1495         .dt_trans_start    = osd_trans_start,
1496         .dt_trans_stop     = osd_trans_stop,
1497         .dt_trans_cb_add   = osd_trans_cb_add,
1498         .dt_conf_get       = osd_conf_get,
1499         .dt_sync           = osd_sync,
1500         .dt_ro             = osd_ro,
1501         .dt_commit_async   = osd_commit_async,
1502         .dt_init_capa_ctxt = osd_init_capa_ctxt,
1503 };
1504
1505 static void osd_object_read_lock(const struct lu_env *env,
1506                                  struct dt_object *dt, unsigned role)
1507 {
1508         struct osd_object *obj = osd_dt_obj(dt);
1509         struct osd_thread_info *oti = osd_oti_get(env);
1510
1511         LINVRNT(osd_invariant(obj));
1512
1513         LASSERT(obj->oo_owner != env);
1514         down_read_nested(&obj->oo_sem, role);
1515
1516         LASSERT(obj->oo_owner == NULL);
1517         oti->oti_r_locks++;
1518 }
1519
1520 static void osd_object_write_lock(const struct lu_env *env,
1521                                   struct dt_object *dt, unsigned role)
1522 {
1523         struct osd_object *obj = osd_dt_obj(dt);
1524         struct osd_thread_info *oti = osd_oti_get(env);
1525
1526         LINVRNT(osd_invariant(obj));
1527
1528         LASSERT(obj->oo_owner != env);
1529         down_write_nested(&obj->oo_sem, role);
1530
1531         LASSERT(obj->oo_owner == NULL);
1532         obj->oo_owner = env;
1533         oti->oti_w_locks++;
1534 }
1535
1536 static void osd_object_read_unlock(const struct lu_env *env,
1537                                    struct dt_object *dt)
1538 {
1539         struct osd_object *obj = osd_dt_obj(dt);
1540         struct osd_thread_info *oti = osd_oti_get(env);
1541
1542         LINVRNT(osd_invariant(obj));
1543
1544         LASSERT(oti->oti_r_locks > 0);
1545         oti->oti_r_locks--;
1546         up_read(&obj->oo_sem);
1547 }
1548
1549 static void osd_object_write_unlock(const struct lu_env *env,
1550                                     struct dt_object *dt)
1551 {
1552         struct osd_object *obj = osd_dt_obj(dt);
1553         struct osd_thread_info *oti = osd_oti_get(env);
1554
1555         LINVRNT(osd_invariant(obj));
1556
1557         LASSERT(obj->oo_owner == env);
1558         LASSERT(oti->oti_w_locks > 0);
1559         oti->oti_w_locks--;
1560         obj->oo_owner = NULL;
1561         up_write(&obj->oo_sem);
1562 }
1563
1564 static int osd_object_write_locked(const struct lu_env *env,
1565                                    struct dt_object *dt)
1566 {
1567         struct osd_object *obj = osd_dt_obj(dt);
1568
1569         LINVRNT(osd_invariant(obj));
1570
1571         return obj->oo_owner == env;
1572 }
1573
1574 static int capa_is_sane(const struct lu_env *env,
1575                         struct osd_device *dev,
1576                         struct lustre_capa *capa,
1577                         struct lustre_capa_key *keys)
1578 {
1579         struct osd_thread_info *oti = osd_oti_get(env);
1580         struct lustre_capa *tcapa = &oti->oti_capa;
1581         struct obd_capa *oc;
1582         int i, rc = 0;
1583         ENTRY;
1584
1585         oc = capa_lookup(dev->od_capa_hash, capa, 0);
1586         if (oc) {
1587                 if (capa_is_expired(oc)) {
1588                         DEBUG_CAPA(D_ERROR, capa, "expired");
1589                         rc = -ESTALE;
1590                 }
1591                 capa_put(oc);
1592                 RETURN(rc);
1593         }
1594
1595         if (capa_is_expired_sec(capa)) {
1596                 DEBUG_CAPA(D_ERROR, capa, "expired");
1597                 RETURN(-ESTALE);
1598         }
1599
1600         spin_lock(&capa_lock);
1601         for (i = 0; i < 2; i++) {
1602                 if (keys[i].lk_keyid == capa->lc_keyid) {
1603                         oti->oti_capa_key = keys[i];
1604                         break;
1605                 }
1606         }
1607         spin_unlock(&capa_lock);
1608
1609         if (i == 2) {
1610                 DEBUG_CAPA(D_ERROR, capa, "no matched capa key");
1611                 RETURN(-ESTALE);
1612         }
1613
1614         rc = capa_hmac(tcapa->lc_hmac, capa, oti->oti_capa_key.lk_key);
1615         if (rc)
1616                 RETURN(rc);
1617
1618         if (memcmp(tcapa->lc_hmac, capa->lc_hmac, sizeof(capa->lc_hmac))) {
1619                 DEBUG_CAPA(D_ERROR, capa, "HMAC mismatch");
1620                 RETURN(-EACCES);
1621         }
1622
1623         oc = capa_add(dev->od_capa_hash, capa);
1624         capa_put(oc);
1625
1626         RETURN(0);
1627 }
1628
1629 int osd_object_auth(const struct lu_env *env, struct dt_object *dt,
1630                     struct lustre_capa *capa, __u64 opc)
1631 {
1632         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
1633         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
1634         struct lu_capainfo *lci;
1635         int rc;
1636
1637         if (!osd->od_fl_capa)
1638                 return 0;
1639
1640         if (capa == BYPASS_CAPA)
1641                 return 0;
1642
1643         lci = lu_capainfo_get(env);
1644         if (unlikely(lci == NULL))
1645                 return 0;
1646
1647         if (lci->lci_auth == LC_ID_NONE)
1648                 return 0;
1649
1650         if (capa == NULL) {
1651                 CERROR("%s: no capability provided for FID "DFID": rc = %d\n",
1652                        osd_name(osd), PFID(fid), -EACCES);
1653                 return -EACCES;
1654         }
1655
1656         if (!lu_fid_eq(fid, &capa->lc_fid)) {
1657                 DEBUG_CAPA(D_ERROR, capa, "fid "DFID" mismatch with",
1658                            PFID(fid));
1659                 return -EACCES;
1660         }
1661
1662         if (!capa_opc_supported(capa, opc)) {
1663                 DEBUG_CAPA(D_ERROR, capa, "opc "LPX64" not supported by", opc);
1664                 return -EACCES;
1665         }
1666
1667         rc = capa_is_sane(env, osd, capa, osd->od_capa_keys);
1668         if (rc != 0) {
1669                 DEBUG_CAPA(D_ERROR, capa, "insane: rc = %d", rc);
1670                 return -EACCES;
1671         }
1672
1673         return 0;
1674 }
1675
1676 static struct timespec *osd_inode_time(const struct lu_env *env,
1677                                        struct inode *inode, __u64 seconds)
1678 {
1679         struct osd_thread_info  *oti = osd_oti_get(env);
1680         struct timespec         *t   = &oti->oti_time;
1681
1682         t->tv_sec = seconds;
1683         t->tv_nsec = 0;
1684         *t = timespec_trunc(*t, inode->i_sb->s_time_gran);
1685         return t;
1686 }
1687
1688
1689 static void osd_inode_getattr(const struct lu_env *env,
1690                               struct inode *inode, struct lu_attr *attr)
1691 {
1692         attr->la_valid  |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
1693                            LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
1694                            LA_FLAGS | LA_NLINK | LA_RDEV | LA_BLKSIZE |
1695                            LA_TYPE;
1696
1697         attr->la_atime   = LTIME_S(inode->i_atime);
1698         attr->la_mtime   = LTIME_S(inode->i_mtime);
1699         attr->la_ctime   = LTIME_S(inode->i_ctime);
1700         attr->la_mode    = inode->i_mode;
1701         attr->la_size    = i_size_read(inode);
1702         attr->la_blocks  = inode->i_blocks;
1703         attr->la_uid     = i_uid_read(inode);
1704         attr->la_gid     = i_gid_read(inode);
1705         attr->la_flags   = LDISKFS_I(inode)->i_flags;
1706         attr->la_nlink   = inode->i_nlink;
1707         attr->la_rdev    = inode->i_rdev;
1708         attr->la_blksize = 1 << inode->i_blkbits;
1709         attr->la_blkbits = inode->i_blkbits;
1710 }
1711
1712 static int osd_attr_get(const struct lu_env *env,
1713                         struct dt_object *dt,
1714                         struct lu_attr *attr,
1715                         struct lustre_capa *capa)
1716 {
1717         struct osd_object *obj = osd_dt_obj(dt);
1718
1719         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
1720         LINVRNT(osd_invariant(obj));
1721
1722         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
1723                 return -EACCES;
1724
1725         spin_lock(&obj->oo_guard);
1726         osd_inode_getattr(env, obj->oo_inode, attr);
1727         spin_unlock(&obj->oo_guard);
1728         return 0;
1729 }
1730
1731 static int osd_declare_attr_set(const struct lu_env *env,
1732                                 struct dt_object *dt,
1733                                 const struct lu_attr *attr,
1734                                 struct thandle *handle)
1735 {
1736         struct osd_thandle     *oh;
1737         struct osd_object      *obj;
1738         struct osd_thread_info *info = osd_oti_get(env);
1739         struct lquota_id_info  *qi = &info->oti_qi;
1740         qid_t                   uid;
1741         qid_t                   gid;
1742         long long               bspace;
1743         int                     rc = 0;
1744         bool                    allocated;
1745         ENTRY;
1746
1747         LASSERT(dt != NULL);
1748         LASSERT(handle != NULL);
1749
1750         obj = osd_dt_obj(dt);
1751         LASSERT(osd_invariant(obj));
1752
1753         oh = container_of0(handle, struct osd_thandle, ot_super);
1754         LASSERT(oh->ot_handle == NULL);
1755
1756         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
1757                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
1758
1759         if (attr == NULL || obj->oo_inode == NULL)
1760                 RETURN(rc);
1761
1762         bspace   = obj->oo_inode->i_blocks;
1763         bspace <<= obj->oo_inode->i_sb->s_blocksize_bits;
1764         bspace   = toqb(bspace);
1765
1766         /* Changing ownership is always preformed by super user, it should not
1767          * fail with EDQUOT.
1768          *
1769          * We still need to call the osd_declare_qid() to calculate the journal
1770          * credits for updating quota accounting files and to trigger quota
1771          * space adjustment once the operation is completed.*/
1772         if ((attr->la_valid & LA_UID) != 0 &&
1773              attr->la_uid != (uid = i_uid_read(obj->oo_inode))) {
1774                 qi->lqi_type = USRQUOTA;
1775
1776                 /* inode accounting */
1777                 qi->lqi_is_blk = false;
1778
1779                 /* one more inode for the new owner ... */
1780                 qi->lqi_id.qid_uid = attr->la_uid;
1781                 qi->lqi_space      = 1;
1782                 allocated = (attr->la_uid == 0) ? true : false;
1783                 rc = osd_declare_qid(env, oh, qi, allocated, NULL);
1784                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1785                         rc = 0;
1786                 if (rc)
1787                         RETURN(rc);
1788
1789                 /* and one less inode for the current uid */
1790                 qi->lqi_id.qid_uid = uid;
1791                 qi->lqi_space      = -1;
1792                 rc = osd_declare_qid(env, oh, qi, true, NULL);
1793                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1794                         rc = 0;
1795                 if (rc)
1796                         RETURN(rc);
1797
1798                 /* block accounting */
1799                 qi->lqi_is_blk = true;
1800
1801                 /* more blocks for the new owner ... */
1802                 qi->lqi_id.qid_uid = attr->la_uid;
1803                 qi->lqi_space      = bspace;
1804                 allocated = (attr->la_uid == 0) ? true : false;
1805                 rc = osd_declare_qid(env, oh, qi, allocated, NULL);
1806                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1807                         rc = 0;
1808                 if (rc)
1809                         RETURN(rc);
1810
1811                 /* and finally less blocks for the current owner */
1812                 qi->lqi_id.qid_uid = uid;
1813                 qi->lqi_space      = -bspace;
1814                 rc = osd_declare_qid(env, oh, qi, true, NULL);
1815                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1816                         rc = 0;
1817                 if (rc)
1818                         RETURN(rc);
1819         }
1820
1821         if (attr->la_valid & LA_GID &&
1822             attr->la_gid != (gid = i_gid_read(obj->oo_inode))) {
1823                 qi->lqi_type = GRPQUOTA;
1824
1825                 /* inode accounting */
1826                 qi->lqi_is_blk = false;
1827
1828                 /* one more inode for the new group owner ... */
1829                 qi->lqi_id.qid_gid = attr->la_gid;
1830                 qi->lqi_space      = 1;
1831                 allocated = (attr->la_gid == 0) ? true : false;
1832                 rc = osd_declare_qid(env, oh, qi, allocated, NULL);
1833                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1834                         rc = 0;
1835                 if (rc)
1836                         RETURN(rc);
1837
1838                 /* and one less inode for the current gid */
1839                 qi->lqi_id.qid_gid = gid;
1840                 qi->lqi_space      = -1;
1841                 rc = osd_declare_qid(env, oh, qi, true, NULL);
1842                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1843                         rc = 0;
1844                 if (rc)
1845                         RETURN(rc);
1846
1847                 /* block accounting */
1848                 qi->lqi_is_blk = true;
1849
1850                 /* more blocks for the new owner ... */
1851                 qi->lqi_id.qid_gid = attr->la_gid;
1852                 qi->lqi_space      = bspace;
1853                 allocated = (attr->la_gid == 0) ? true : false;
1854                 rc = osd_declare_qid(env, oh, qi, allocated, NULL);
1855                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1856                         rc = 0;
1857                 if (rc)
1858                         RETURN(rc);
1859
1860                 /* and finally less blocks for the current owner */
1861                 qi->lqi_id.qid_gid = gid;
1862                 qi->lqi_space      = -bspace;
1863                 rc = osd_declare_qid(env, oh, qi, true, NULL);
1864                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1865                         rc = 0;
1866                 if (rc)
1867                         RETURN(rc);
1868         }
1869
1870         RETURN(rc);
1871 }
1872
1873 static int osd_inode_setattr(const struct lu_env *env,
1874                              struct inode *inode, const struct lu_attr *attr)
1875 {
1876         __u64 bits = attr->la_valid;
1877
1878         /* Only allow set size for regular file */
1879         if (!S_ISREG(inode->i_mode))
1880                 bits &= ~(LA_SIZE | LA_BLOCKS);
1881
1882         if (bits == 0)
1883                 return 0;
1884
1885         if (bits & LA_ATIME)
1886                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
1887         if (bits & LA_CTIME)
1888                 inode->i_ctime  = *osd_inode_time(env, inode, attr->la_ctime);
1889         if (bits & LA_MTIME)
1890                 inode->i_mtime  = *osd_inode_time(env, inode, attr->la_mtime);
1891         if (bits & LA_SIZE) {
1892                 LDISKFS_I(inode)->i_disksize = attr->la_size;
1893                 i_size_write(inode, attr->la_size);
1894         }
1895
1896 #if 0
1897         /* OSD should not change "i_blocks" which is used by quota.
1898          * "i_blocks" should be changed by ldiskfs only. */
1899         if (bits & LA_BLOCKS)
1900                 inode->i_blocks = attr->la_blocks;
1901 #endif
1902         if (bits & LA_MODE)
1903                 inode->i_mode = (inode->i_mode & S_IFMT) |
1904                                 (attr->la_mode & ~S_IFMT);
1905         if (bits & LA_UID)
1906                 i_uid_write(inode, attr->la_uid);
1907         if (bits & LA_GID)
1908                 i_gid_write(inode, attr->la_gid);
1909         if (bits & LA_NLINK)
1910                 set_nlink(inode, attr->la_nlink);
1911         if (bits & LA_RDEV)
1912                 inode->i_rdev = attr->la_rdev;
1913
1914         if (bits & LA_FLAGS) {
1915                 /* always keep S_NOCMTIME */
1916                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
1917                                  S_NOCMTIME;
1918         }
1919         return 0;
1920 }
1921
1922 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr)
1923 {
1924         if ((attr->la_valid & LA_UID && attr->la_uid != i_uid_read(inode)) ||
1925             (attr->la_valid & LA_GID && attr->la_gid != i_gid_read(inode))) {
1926                 struct iattr    iattr;
1927                 int             rc;
1928
1929                 iattr.ia_valid = 0;
1930                 if (attr->la_valid & LA_UID)
1931                         iattr.ia_valid |= ATTR_UID;
1932                 if (attr->la_valid & LA_GID)
1933                         iattr.ia_valid |= ATTR_GID;
1934                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
1935                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
1936
1937                 rc = ll_vfs_dq_transfer(inode, &iattr);
1938                 if (rc) {
1939                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
1940                                "enforcement enabled on the ldiskfs "
1941                                "filesystem?\n", inode->i_sb->s_id, rc);
1942                         return rc;
1943                 }
1944         }
1945         return 0;
1946 }
1947
1948 static int osd_attr_set(const struct lu_env *env,
1949                         struct dt_object *dt,
1950                         const struct lu_attr *attr,
1951                         struct thandle *handle,
1952                         struct lustre_capa *capa)
1953 {
1954         struct osd_object *obj = osd_dt_obj(dt);
1955         struct inode      *inode;
1956         int rc;
1957
1958         LASSERT(handle != NULL);
1959         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
1960         LASSERT(osd_invariant(obj));
1961
1962         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
1963                 return -EACCES;
1964
1965         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
1966
1967         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING)) {
1968                 struct osd_thread_info  *oti  = osd_oti_get(env);
1969                 const struct lu_fid     *fid0 = lu_object_fid(&dt->do_lu);
1970                 struct lu_fid           *fid1 = &oti->oti_fid;
1971                 struct osd_inode_id     *id   = &oti->oti_id;
1972                 struct iam_path_descr   *ipd;
1973                 struct iam_container    *bag;
1974                 struct osd_thandle      *oh;
1975                 int                      rc;
1976
1977                 fid_cpu_to_be(fid1, fid0);
1978                 memset(id, 1, sizeof(*id));
1979                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
1980                                   fid0)->oi_dir.od_container;
1981                 ipd = osd_idx_ipd_get(env, bag);
1982                 if (unlikely(ipd == NULL))
1983                         RETURN(-ENOMEM);
1984
1985                 oh = container_of0(handle, struct osd_thandle, ot_super);
1986                 rc = iam_update(oh->ot_handle, bag, (const struct iam_key *)fid1,
1987                                 (const struct iam_rec *)id, ipd);
1988                 osd_ipd_put(env, bag, ipd);
1989                 return(rc > 0 ? 0 : rc);
1990         }
1991
1992         inode = obj->oo_inode;
1993         ll_vfs_dq_init(inode);
1994
1995         rc = osd_quota_transfer(inode, attr);
1996         if (rc)
1997                 return rc;
1998
1999         spin_lock(&obj->oo_guard);
2000         rc = osd_inode_setattr(env, inode, attr);
2001         spin_unlock(&obj->oo_guard);
2002
2003         if (!rc)
2004                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2005         return rc;
2006 }
2007
2008 struct dentry *osd_child_dentry_get(const struct lu_env *env,
2009                                     struct osd_object *obj,
2010                                     const char *name, const int namelen)
2011 {
2012         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
2013 }
2014
2015 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
2016                       umode_t mode, struct dt_allocation_hint *hint,
2017                       struct thandle *th)
2018 {
2019         int result;
2020         struct osd_device  *osd = osd_obj2dev(obj);
2021         struct osd_thandle *oth;
2022         struct dt_object   *parent = NULL;
2023         struct inode       *inode;
2024
2025         LINVRNT(osd_invariant(obj));
2026         LASSERT(obj->oo_inode == NULL);
2027         LASSERT(obj->oo_hl_head == NULL);
2028
2029         if (S_ISDIR(mode) && ldiskfs_pdo) {
2030                 obj->oo_hl_head =ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
2031                 if (obj->oo_hl_head == NULL)
2032                         return -ENOMEM;
2033         }
2034
2035         oth = container_of(th, struct osd_thandle, ot_super);
2036         LASSERT(oth->ot_handle->h_transaction != NULL);
2037
2038         if (hint && hint->dah_parent)
2039                 parent = hint->dah_parent;
2040
2041         inode = ldiskfs_create_inode(oth->ot_handle,
2042                                      parent ? osd_dt_obj(parent)->oo_inode :
2043                                               osd_sb(osd)->s_root->d_inode,
2044                                      mode);
2045         if (!IS_ERR(inode)) {
2046                 /* Do not update file c/mtime in ldiskfs.
2047                  * NB: don't need any lock because no contention at this
2048                  * early stage */
2049                 inode->i_flags |= S_NOCMTIME;
2050
2051                 /* For new created object, it must be consistent,
2052                  * and it is unnecessary to scrub against it. */
2053                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
2054                 obj->oo_inode = inode;
2055                 result = 0;
2056         } else {
2057                 if (obj->oo_hl_head != NULL) {
2058                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
2059                         obj->oo_hl_head = NULL;
2060                 }
2061                 result = PTR_ERR(inode);
2062         }
2063         LINVRNT(osd_invariant(obj));
2064         return result;
2065 }
2066
2067 enum {
2068         OSD_NAME_LEN = 255
2069 };
2070
2071 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
2072                      struct lu_attr *attr,
2073                      struct dt_allocation_hint *hint,
2074                      struct dt_object_format *dof,
2075                      struct thandle *th)
2076 {
2077         int result;
2078         struct osd_thandle *oth;
2079         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX));
2080
2081         LASSERT(S_ISDIR(attr->la_mode));
2082
2083         oth = container_of(th, struct osd_thandle, ot_super);
2084         LASSERT(oth->ot_handle->h_transaction != NULL);
2085         result = osd_mkfile(info, obj, mode, hint, th);
2086
2087         return result;
2088 }
2089
2090 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
2091                         struct lu_attr *attr,
2092                         struct dt_allocation_hint *hint,
2093                         struct dt_object_format *dof,
2094                         struct thandle *th)
2095 {
2096         int result;
2097         struct osd_thandle *oth;
2098         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
2099
2100         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
2101
2102         LASSERT(S_ISREG(attr->la_mode));
2103
2104         oth = container_of(th, struct osd_thandle, ot_super);
2105         LASSERT(oth->ot_handle->h_transaction != NULL);
2106
2107         result = osd_mkfile(info, obj, mode, hint, th);
2108         if (result == 0) {
2109                 LASSERT(obj->oo_inode != NULL);
2110                 if (feat->dif_flags & DT_IND_VARKEY)
2111                         result = iam_lvar_create(obj->oo_inode,
2112                                                  feat->dif_keysize_max,
2113                                                  feat->dif_ptrsize,
2114                                                  feat->dif_recsize_max,
2115                                                  oth->ot_handle);
2116                 else
2117                         result = iam_lfix_create(obj->oo_inode,
2118                                                  feat->dif_keysize_max,
2119                                                  feat->dif_ptrsize,
2120                                                  feat->dif_recsize_max,
2121                                                  oth->ot_handle);
2122
2123         }
2124         return result;
2125 }
2126
2127 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
2128                      struct lu_attr *attr,
2129                      struct dt_allocation_hint *hint,
2130                      struct dt_object_format *dof,
2131                      struct thandle *th)
2132 {
2133         LASSERT(S_ISREG(attr->la_mode));
2134         return osd_mkfile(info, obj, (attr->la_mode &
2135                                (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2136 }
2137
2138 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
2139                      struct lu_attr *attr,
2140                      struct dt_allocation_hint *hint,
2141                      struct dt_object_format *dof,
2142                      struct thandle *th)
2143 {
2144         LASSERT(S_ISLNK(attr->la_mode));
2145         return osd_mkfile(info, obj, (attr->la_mode &
2146                               (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2147 }
2148
2149 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
2150                      struct lu_attr *attr,
2151                      struct dt_allocation_hint *hint,
2152                      struct dt_object_format *dof,
2153                      struct thandle *th)
2154 {
2155         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
2156         int result;
2157
2158         LINVRNT(osd_invariant(obj));
2159         LASSERT(obj->oo_inode == NULL);
2160         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
2161                 S_ISFIFO(mode) || S_ISSOCK(mode));
2162
2163         result = osd_mkfile(info, obj, mode, hint, th);
2164         if (result == 0) {
2165                 LASSERT(obj->oo_inode != NULL);
2166                 /*
2167                  * This inode should be marked dirty for i_rdev.  Currently
2168                  * that is done in the osd_attr_init().
2169                  */
2170                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
2171                                    attr->la_rdev);
2172         }
2173         LINVRNT(osd_invariant(obj));
2174         return result;
2175 }
2176
2177 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
2178                               struct lu_attr *,
2179                               struct dt_allocation_hint *hint,
2180                               struct dt_object_format *dof,
2181                               struct thandle *);
2182
2183 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
2184 {
2185         osd_obj_type_f result;
2186
2187         switch (type) {
2188         case DFT_DIR:
2189                 result = osd_mkdir;
2190                 break;
2191         case DFT_REGULAR:
2192                 result = osd_mkreg;
2193                 break;
2194         case DFT_SYM:
2195                 result = osd_mksym;
2196                 break;
2197         case DFT_NODE:
2198                 result = osd_mknod;
2199                 break;
2200         case DFT_INDEX:
2201                 result = osd_mk_index;
2202                 break;
2203
2204         default:
2205                 LBUG();
2206                 break;
2207         }
2208         return result;
2209 }
2210
2211
2212 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
2213                         struct dt_object *parent, struct dt_object *child,
2214                         umode_t child_mode)
2215 {
2216         LASSERT(ah);
2217
2218         ah->dah_parent = parent;
2219         ah->dah_mode = child_mode;
2220 }
2221
2222 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
2223                           struct lu_attr *attr, struct dt_object_format *dof)
2224 {
2225         struct inode   *inode = obj->oo_inode;
2226         __u64           valid = attr->la_valid;
2227         int             result;
2228
2229         attr->la_valid &= ~(LA_TYPE | LA_MODE);
2230
2231         if (dof->dof_type != DFT_NODE)
2232                 attr->la_valid &= ~LA_RDEV;
2233         if ((valid & LA_ATIME) && (attr->la_atime == LTIME_S(inode->i_atime)))
2234                 attr->la_valid &= ~LA_ATIME;
2235         if ((valid & LA_CTIME) && (attr->la_ctime == LTIME_S(inode->i_ctime)))
2236                 attr->la_valid &= ~LA_CTIME;
2237         if ((valid & LA_MTIME) && (attr->la_mtime == LTIME_S(inode->i_mtime)))
2238                 attr->la_valid &= ~LA_MTIME;
2239
2240         result = osd_quota_transfer(inode, attr);
2241         if (result)
2242                 return;
2243
2244         if (attr->la_valid != 0) {
2245                 result = osd_inode_setattr(info->oti_env, inode, attr);
2246                 /*
2247                  * The osd_inode_setattr() should always succeed here.  The
2248                  * only error that could be returned is EDQUOT when we are
2249                  * trying to change the UID or GID of the inode. However, this
2250                  * should not happen since quota enforcement is no longer
2251                  * enabled on ldiskfs (lquota takes care of it).
2252                  */
2253                 LASSERTF(result == 0, "%d\n", result);
2254                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2255         }
2256
2257         attr->la_valid = valid;
2258 }
2259
2260 /**
2261  * Helper function for osd_object_create()
2262  *
2263  * \retval 0, on success
2264  */
2265 static int __osd_object_create(struct osd_thread_info *info,
2266                                struct osd_object *obj, struct lu_attr *attr,
2267                                struct dt_allocation_hint *hint,
2268                                struct dt_object_format *dof,
2269                                struct thandle *th)
2270 {
2271         int     result;
2272         __u32   umask;
2273
2274         /* we drop umask so that permissions we pass are not affected */
2275         umask = current->fs->umask;
2276         current->fs->umask = 0;
2277
2278         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
2279                                                   th);
2280         if (result == 0) {
2281                 osd_attr_init(info, obj, attr, dof);
2282                 osd_object_init0(obj);
2283                 /* bz 24037 */
2284                 if (obj->oo_inode && (obj->oo_inode->i_state & I_NEW))
2285                         unlock_new_inode(obj->oo_inode);
2286         }
2287
2288         /* restore previous umask value */
2289         current->fs->umask = umask;
2290
2291         return result;
2292 }
2293
2294 /**
2295  * Helper function for osd_object_create()
2296  *
2297  * \retval 0, on success
2298  */
2299 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
2300                            const struct lu_fid *fid, struct thandle *th)
2301 {
2302         struct osd_thread_info *info = osd_oti_get(env);
2303         struct osd_inode_id    *id   = &info->oti_id;
2304         struct osd_device      *osd  = osd_obj2dev(obj);
2305         struct osd_thandle     *oh;
2306
2307         LASSERT(obj->oo_inode != NULL);
2308
2309         oh = container_of0(th, struct osd_thandle, ot_super);
2310         LASSERT(oh->ot_handle);
2311
2312         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
2313         return osd_oi_insert(info, osd, fid, id, oh->ot_handle, OI_CHECK_FLD);
2314 }
2315
2316 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
2317                    obd_seq seq, struct lu_seq_range *range)
2318 {
2319         struct seq_server_site  *ss = osd_seq_site(osd);
2320
2321         if (fid_seq_is_idif(seq)) {
2322                 fld_range_set_ost(range);
2323                 range->lsr_index = idif_ost_idx(seq);
2324                 return 0;
2325         }
2326
2327         if (!fid_seq_in_fldb(seq)) {
2328                 fld_range_set_mdt(range);
2329                 if (ss != NULL)
2330                         /* FIXME: If ss is NULL, it suppose not get lsr_index
2331                          * at all */
2332                         range->lsr_index = ss->ss_node_id;
2333                 return 0;
2334         }
2335
2336         LASSERT(ss != NULL);
2337         fld_range_set_any(range);
2338         /* OSD will only do local fld lookup */
2339         return fld_local_lookup(env, ss->ss_server_fld, seq, range);
2340 }
2341
2342 /*
2343  * Concurrency: no external locking is necessary.
2344  */
2345 static int osd_declare_object_create(const struct lu_env *env,
2346                                      struct dt_object *dt,
2347                                      struct lu_attr *attr,
2348                                      struct dt_allocation_hint *hint,
2349                                      struct dt_object_format *dof,
2350                                      struct thandle *handle)
2351 {
2352         struct osd_thandle      *oh;
2353         int                      rc;
2354         ENTRY;
2355
2356         LASSERT(handle != NULL);
2357
2358         oh = container_of0(handle, struct osd_thandle, ot_super);
2359         LASSERT(oh->ot_handle == NULL);
2360
2361         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
2362                              osd_dto_credits_noquota[DTO_OBJECT_CREATE]);
2363         /* Reuse idle OI block may cause additional one OI block
2364          * to be changed. */
2365         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
2366                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
2367
2368         /* If this is directory, then we expect . and .. to be inserted as
2369          * well. The one directory block always needs to be created for the
2370          * directory, so we could use DTO_WRITE_BASE here (GDT, block bitmap,
2371          * block), there is no danger of needing a tree for the first block.
2372          */
2373         if (attr && S_ISDIR(attr->la_mode)) {
2374                 osd_trans_declare_op(env, oh, OSD_OT_INSERT,
2375                                      osd_dto_credits_noquota[DTO_WRITE_BASE]);
2376                 osd_trans_declare_op(env, oh, OSD_OT_INSERT, 0);
2377         }
2378
2379         if (!attr)
2380                 RETURN(0);
2381
2382         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid, 1, oh,
2383                                    false, false, NULL, false);
2384         if (rc != 0)
2385                 RETURN(rc);
2386
2387         RETURN(rc);
2388 }
2389
2390 static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
2391                              struct lu_attr *attr,
2392                              struct dt_allocation_hint *hint,
2393                              struct dt_object_format *dof,
2394                              struct thandle *th)
2395 {
2396         const struct lu_fid    *fid    = lu_object_fid(&dt->do_lu);
2397         struct osd_object      *obj    = osd_dt_obj(dt);
2398         struct osd_thread_info *info   = osd_oti_get(env);
2399         int result;
2400
2401         ENTRY;
2402
2403         LINVRNT(osd_invariant(obj));
2404         LASSERT(!dt_object_exists(dt) && !dt_object_remote(dt));
2405         LASSERT(osd_write_locked(env, obj));
2406         LASSERT(th != NULL);
2407
2408         if (unlikely(fid_is_acct(fid)))
2409                 /* Quota files can't be created from the kernel any more,
2410                  * 'tune2fs -O quota' will take care of creating them */
2411                 RETURN(-EPERM);
2412
2413         osd_trans_exec_op(env, th, OSD_OT_CREATE);
2414         osd_trans_declare_rb(env, th, OSD_OT_REF_ADD);
2415
2416         result = __osd_object_create(info, obj, attr, hint, dof, th);
2417         if (result == 0)
2418                 result = __osd_oi_insert(env, obj, fid, th);
2419
2420         LASSERT(ergo(result == 0,
2421                      dt_object_exists(dt) && !dt_object_remote(dt)));
2422
2423         LASSERT(osd_invariant(obj));
2424         RETURN(result);
2425 }
2426
2427 /**
2428  * Called to destroy on-disk representation of the object
2429  *
2430  * Concurrency: must be locked
2431  */
2432 static int osd_declare_object_destroy(const struct lu_env *env,
2433                                       struct dt_object *dt,
2434                                       struct thandle *th)
2435 {
2436         struct osd_object  *obj = osd_dt_obj(dt);
2437         struct inode       *inode = obj->oo_inode;
2438         struct osd_thandle *oh;
2439         int                 rc;
2440         ENTRY;
2441
2442         oh = container_of0(th, struct osd_thandle, ot_super);
2443         LASSERT(oh->ot_handle == NULL);
2444         LASSERT(inode);
2445
2446         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
2447                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
2448         /* Recycle idle OI leaf may cause additional three OI blocks
2449          * to be changed. */
2450         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
2451                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
2452         /* one less inode */
2453         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
2454                                    -1, oh, false, true, NULL, false);
2455         if (rc)
2456                 RETURN(rc);
2457         /* data to be truncated */
2458         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
2459                                    0, oh, true, true, NULL, false);
2460         RETURN(rc);
2461 }
2462
2463 static int osd_object_destroy(const struct lu_env *env,
2464                               struct dt_object *dt,
2465                               struct thandle *th)
2466 {
2467         const struct lu_fid    *fid = lu_object_fid(&dt->do_lu);
2468         struct osd_object      *obj = osd_dt_obj(dt);
2469         struct inode           *inode = obj->oo_inode;
2470         struct osd_device      *osd = osd_obj2dev(obj);
2471         struct osd_thandle     *oh;
2472         int                     result;
2473         ENTRY;
2474
2475         oh = container_of0(th, struct osd_thandle, ot_super);
2476         LASSERT(oh->ot_handle);
2477         LASSERT(inode);
2478         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
2479
2480         if (unlikely(fid_is_acct(fid)))
2481                 RETURN(-EPERM);
2482
2483         if (S_ISDIR(inode->i_mode)) {
2484                 LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1 ||
2485                         inode->i_nlink == 2);
2486                 /* it will check/delete the inode from remote parent,
2487                  * how to optimize it? unlink performance impaction XXX */
2488                 result = osd_delete_from_remote_parent(env, osd, obj, oh);
2489                 if (result != 0 && result != -ENOENT) {
2490                         CERROR("%s: delete inode "DFID": rc = %d\n",
2491                                osd_name(osd), PFID(fid), result);
2492                 }
2493                 spin_lock(&obj->oo_guard);
2494                 clear_nlink(inode);
2495                 spin_unlock(&obj->oo_guard);
2496                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2497         }
2498
2499         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
2500
2501         result = osd_oi_delete(osd_oti_get(env), osd, fid, oh->ot_handle,
2502                                OI_CHECK_FLD);
2503
2504         /* XXX: add to ext3 orphan list */
2505         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
2506
2507         /* not needed in the cache anymore */
2508         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
2509
2510         RETURN(0);
2511 }
2512
2513 /**
2514  * Put the fid into lustre_mdt_attrs, and then place the structure
2515  * inode's ea. This fid should not be altered during the life time
2516  * of the inode.
2517  *
2518  * \retval +ve, on success
2519  * \retval -ve, on error
2520  *
2521  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
2522  */
2523 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
2524                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
2525 {
2526         struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
2527         int                      rc;
2528         ENTRY;
2529
2530         if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
2531                 RETURN(0);
2532
2533         lustre_lma_init(lma, fid, compat, incompat);
2534         lustre_lma_swab(lma);
2535
2536         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma, sizeof(*lma),
2537                              XATTR_CREATE);
2538         /* LMA may already exist, but we need to check that all the
2539          * desired compat/incompat flags have been added. */
2540         if (unlikely(rc == -EEXIST)) {
2541                 if (compat == 0 && incompat == 0)
2542                         RETURN(0);
2543
2544                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
2545                                      XATTR_NAME_LMA, info->oti_mdt_attrs_old,
2546                                      LMA_OLD_SIZE);
2547                 if (rc <= 0)
2548                         RETURN(-EINVAL);
2549
2550                 lustre_lma_swab(lma);
2551                 if (!(~lma->lma_compat & compat) &&
2552                     !(~lma->lma_incompat & incompat))
2553                         RETURN(0);
2554
2555                 lma->lma_compat |= compat;
2556                 lma->lma_incompat |= incompat;
2557                 lustre_lma_swab(lma);
2558                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
2559                                      sizeof(*lma), XATTR_REPLACE);
2560         }
2561
2562         RETURN(rc);
2563 }
2564
2565 /**
2566  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
2567  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
2568  * To have compatilibility with 1.8 ldiskfs driver we need to have
2569  * magic number at start of fid data.
2570  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
2571  * its inmemory API.
2572  */
2573 void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
2574                                   const struct lu_fid *fid)
2575 {
2576         if (!fid_is_namespace_visible(fid) ||
2577             OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
2578                 param->edp_magic = 0;
2579                 return;
2580         }
2581
2582         param->edp_magic = LDISKFS_LUFID_MAGIC;
2583         param->edp_len =  sizeof(struct lu_fid) + 1;
2584         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
2585 }
2586
2587 /**
2588  * Try to read the fid from inode ea into dt_rec.
2589  *
2590  * \param fid object fid.
2591  *
2592  * \retval 0 on success
2593  */
2594 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
2595                           __u32 ino, struct lu_fid *fid,
2596                           struct osd_inode_id *id)
2597 {
2598         struct osd_thread_info *info  = osd_oti_get(env);
2599         struct inode           *inode;
2600         ENTRY;
2601
2602         osd_id_gen(id, ino, OSD_OII_NOGEN);
2603         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
2604         if (IS_ERR(inode))
2605                 RETURN(PTR_ERR(inode));
2606
2607         iput(inode);
2608         RETURN(0);
2609 }
2610
2611 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
2612                                         struct inode *dir,
2613                                         struct inode *parent_dir,
2614                                         const struct lu_fid *dot_fid,
2615                                         const struct lu_fid *dot_dot_fid,
2616                                         struct osd_thandle *oth)
2617 {
2618         struct ldiskfs_dentry_param *dot_ldp;
2619         struct ldiskfs_dentry_param *dot_dot_ldp;
2620
2621         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
2622         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
2623
2624         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
2625         dot_ldp->edp_magic = 0;
2626         return ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
2627                                         dir, dot_ldp, dot_dot_ldp);
2628 }
2629
2630 /**
2631  * Create an local agent inode for remote entry
2632  */
2633 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
2634                                                   struct osd_device *osd,
2635                                                   struct osd_object *pobj,
2636                                                   const struct lu_fid *fid,
2637                                                   __u32 type,
2638                                                   struct thandle *th)
2639 {
2640         struct osd_thread_info  *info = osd_oti_get(env);
2641         struct inode            *local;
2642         struct osd_thandle      *oh;
2643         int                     rc;
2644         ENTRY;
2645
2646         LASSERT(th);
2647         oh = container_of(th, struct osd_thandle, ot_super);
2648         LASSERT(oh->ot_handle->h_transaction != NULL);
2649
2650         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode, type);
2651         if (IS_ERR(local)) {
2652                 CERROR("%s: create local error %d\n", osd_name(osd),
2653                        (int)PTR_ERR(local));
2654                 RETURN(local);
2655         }
2656
2657         /* Set special LMA flag for local agent inode */
2658         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
2659         if (rc != 0) {
2660                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
2661                        osd_name(osd), PFID(fid), rc);
2662                 RETURN(ERR_PTR(rc));
2663         }
2664
2665         if (!S_ISDIR(type))
2666                 RETURN(local);
2667
2668         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
2669                                          lu_object_fid(&pobj->oo_dt.do_lu),
2670                                          fid, oh);
2671         if (rc != 0) {
2672                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
2673                         osd_name(osd), PFID(fid), rc);
2674                 RETURN(ERR_PTR(rc));
2675         }
2676
2677         RETURN(local);
2678 }
2679
2680 /**
2681  * Delete local agent inode for remote entry
2682  */
2683 static int osd_delete_local_agent_inode(const struct lu_env *env,
2684                                         struct osd_device *osd,
2685                                         const struct lu_fid *fid,
2686                                         __u32 ino, struct osd_thandle *oh)
2687 {
2688         struct osd_thread_info  *oti = osd_oti_get(env);
2689         struct osd_inode_id     *id = &oti->oti_id;
2690         struct inode            *inode;
2691         ENTRY;
2692
2693         id->oii_ino = le32_to_cpu(ino);
2694         id->oii_gen = OSD_OII_NOGEN;
2695         inode = osd_iget(oti, osd, id);
2696         if (IS_ERR(inode)) {
2697                 CERROR("%s: iget error "DFID" id %u:%u\n", osd_name(osd),
2698                        PFID(fid), id->oii_ino, id->oii_gen);
2699                 RETURN(PTR_ERR(inode));
2700         }
2701
2702         clear_nlink(inode);
2703         mark_inode_dirty(inode);
2704         CDEBUG(D_INODE, "%s: delete remote inode "DFID" %lu\n",
2705                 osd_name(osd), PFID(fid), inode->i_ino);
2706         iput(inode);
2707         RETURN(0);
2708 }
2709
2710 /**
2711  * OSD layer object create function for interoperability mode (b11826).
2712  * This is mostly similar to osd_object_create(). Only difference being, fid is
2713  * inserted into inode ea here.
2714  *
2715  * \retval   0, on success
2716  * \retval -ve, on error
2717  */
2718 static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
2719                                 struct lu_attr *attr,
2720                                 struct dt_allocation_hint *hint,
2721                                 struct dt_object_format *dof,
2722                                 struct thandle *th)
2723 {
2724         const struct lu_fid    *fid    = lu_object_fid(&dt->do_lu);
2725         struct osd_object      *obj    = osd_dt_obj(dt);
2726         struct osd_thread_info *info   = osd_oti_get(env);
2727         int                     result;
2728
2729         ENTRY;
2730
2731         LASSERT(osd_invariant(obj));
2732         LASSERT(!dt_object_exists(dt) && !dt_object_remote(dt));
2733         LASSERT(osd_write_locked(env, obj));
2734         LASSERT(th != NULL);
2735
2736         if (unlikely(fid_is_acct(fid)))
2737                 /* Quota files can't be created from the kernel any more,
2738                  * 'tune2fs -O quota' will take care of creating them */
2739                 RETURN(-EPERM);
2740
2741         osd_trans_exec_op(env, th, OSD_OT_CREATE);
2742         osd_trans_declare_rb(env, th, OSD_OT_REF_ADD);
2743
2744         result = __osd_object_create(info, obj, attr, hint, dof, th);
2745         if (result == 0)
2746                 result = osd_ea_fid_set(info, obj->oo_inode, fid,
2747                                 fid_is_on_ost(info, osd_obj2dev(obj),
2748                                               fid, OI_CHECK_FLD) ?
2749                                 LMAC_FID_ON_OST : 0, 0);
2750
2751         if (result == 0)
2752                 result = __osd_oi_insert(env, obj, fid, th);
2753
2754         LASSERT(ergo(result == 0,
2755                      dt_object_exists(dt) && !dt_object_remote(dt)));
2756         LINVRNT(osd_invariant(obj));
2757         RETURN(result);
2758 }
2759
2760 static int osd_declare_object_ref_add(const struct lu_env *env,
2761                                       struct dt_object *dt,
2762                                       struct thandle *handle)
2763 {
2764         struct osd_thandle       *oh;
2765
2766         /* it's possible that object doesn't exist yet */
2767         LASSERT(handle != NULL);
2768
2769         oh = container_of0(handle, struct osd_thandle, ot_super);
2770         LASSERT(oh->ot_handle == NULL);
2771
2772         osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
2773                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2774
2775         return 0;
2776 }
2777
2778 /*
2779  * Concurrency: @dt is write locked.
2780  */
2781 static int osd_object_ref_add(const struct lu_env *env,
2782                               struct dt_object *dt, struct thandle *th)
2783 {
2784         struct osd_object  *obj = osd_dt_obj(dt);
2785         struct inode       *inode = obj->oo_inode;
2786         struct osd_thandle *oh;
2787         int                 rc = 0;
2788
2789         LINVRNT(osd_invariant(obj));
2790         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2791         LASSERT(osd_write_locked(env, obj));
2792         LASSERT(th != NULL);
2793
2794         oh = container_of0(th, struct osd_thandle, ot_super);
2795         LASSERT(oh->ot_handle != NULL);
2796
2797         osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
2798
2799         CDEBUG(D_INODE, DFID" increase nlink %d\n",
2800                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
2801         /*
2802          * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
2803          * (65000) subdirectories by storing "1" in i_nlink if the link count
2804          * would otherwise overflow. Directory tranversal tools understand
2805          * that (st_nlink == 1) indicates that the filesystem dose not track
2806          * hard links count on the directory, and will not abort subdirectory
2807          * scanning early once (st_nlink - 2) subdirs have been found.
2808          *
2809          * This also has to properly handle the case of inodes with nlink == 0
2810          * in case they are being linked into the PENDING directory
2811          */
2812 #ifdef I_LINKABLE
2813         /* This is necessary to increment from i_nlink == 0 */
2814         spin_lock(&inode->i_lock);
2815         inode->i_state |= I_LINKABLE;
2816         spin_unlock(&inode->i_lock);
2817 #endif
2818
2819         spin_lock(&obj->oo_guard);
2820         ldiskfs_inc_count(oh->ot_handle, inode);
2821         if (!S_ISDIR(inode->i_mode))
2822                 LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
2823         spin_unlock(&obj->oo_guard);
2824
2825         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2826         LINVRNT(osd_invariant(obj));
2827
2828         return rc;
2829 }
2830
2831 static int osd_declare_object_ref_del(const struct lu_env *env,
2832                                       struct dt_object *dt,
2833                                       struct thandle *handle)
2834 {
2835         struct osd_thandle *oh;
2836
2837         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2838         LASSERT(handle != NULL);
2839
2840         oh = container_of0(handle, struct osd_thandle, ot_super);
2841         LASSERT(oh->ot_handle == NULL);
2842
2843         osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
2844                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2845
2846         return 0;
2847 }
2848
2849 /*
2850  * Concurrency: @dt is write locked.
2851  */
2852 static int osd_object_ref_del(const struct lu_env *env, struct dt_object *dt,
2853                               struct thandle *th)
2854 {
2855         struct osd_object       *obj = osd_dt_obj(dt);
2856         struct inode            *inode = obj->oo_inode;
2857         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
2858         struct osd_thandle      *oh;
2859
2860         LINVRNT(osd_invariant(obj));
2861         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2862         LASSERT(osd_write_locked(env, obj));
2863         LASSERT(th != NULL);
2864
2865         oh = container_of0(th, struct osd_thandle, ot_super);
2866         LASSERT(oh->ot_handle != NULL);
2867
2868         osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
2869
2870         spin_lock(&obj->oo_guard);
2871         /* That can be result of upgrade from old Lustre version and
2872          * applied only to local files.  Just skip this ref_del call.
2873          * ext4_unlink() only treats this as a warning, don't LASSERT here.*/
2874         if (inode->i_nlink == 0) {
2875                 CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
2876                              D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
2877                              ", maybe an upgraded file? (LU-3915)\n",
2878                              osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
2879                 spin_unlock(&obj->oo_guard);
2880                 return 0;
2881         }
2882
2883         CDEBUG(D_INODE, DFID" decrease nlink %d\n",
2884                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
2885
2886         ldiskfs_dec_count(oh->ot_handle, inode);
2887         spin_unlock(&obj->oo_guard);
2888
2889         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2890         LINVRNT(osd_invariant(obj));
2891
2892         return 0;
2893 }
2894
2895 /*
2896  * Get the 64-bit version for an inode.
2897  */
2898 static int osd_object_version_get(const struct lu_env *env,
2899                                   struct dt_object *dt, dt_obj_version_t *ver)
2900 {
2901         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2902
2903         CDEBUG(D_INODE, "Get version "LPX64" for inode %lu\n",
2904                LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2905         *ver = LDISKFS_I(inode)->i_fs_version;
2906         return 0;
2907 }
2908
2909 /*
2910  * Concurrency: @dt is read locked.
2911  */
2912 static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
2913                          struct lu_buf *buf, const char *name,
2914                          struct lustre_capa *capa)
2915 {
2916         struct osd_object      *obj    = osd_dt_obj(dt);
2917         struct inode           *inode  = obj->oo_inode;
2918         struct osd_thread_info *info   = osd_oti_get(env);
2919         struct dentry          *dentry = &info->oti_obj_dentry;
2920
2921         /* version get is not real XATTR but uses xattr API */
2922         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2923                 /* for version we are just using xattr API but change inode
2924                  * field instead */
2925                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
2926                 osd_object_version_get(env, dt, buf->lb_buf);
2927                 return sizeof(dt_obj_version_t);
2928         }
2929
2930         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2931         LASSERT(inode->i_op != NULL && inode->i_op->getxattr != NULL);
2932
2933         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
2934                 return -EACCES;
2935
2936         return __osd_xattr_get(inode, dentry, name, buf->lb_buf, buf->lb_len);
2937 }
2938
2939
2940 static int osd_declare_xattr_set(const struct lu_env *env,
2941                                  struct dt_object *dt,
2942                                  const struct lu_buf *buf, const char *name,
2943                                  int fl, struct thandle *handle)
2944 {
2945         struct osd_thandle *oh;
2946         int credits;
2947
2948         LASSERT(handle != NULL);
2949
2950         oh = container_of0(handle, struct osd_thandle, ot_super);
2951         LASSERT(oh->ot_handle == NULL);
2952
2953         /* optimistic optimization: LMA is set first and usually fit inode */
2954         if (strcmp(name, XATTR_NAME_LMA) == 0) {
2955                 if (dt_object_exists(dt))
2956                         credits = 0;
2957                 else
2958                         credits = 1;
2959         } else if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2960                 credits = 1;
2961         } else {
2962                 struct osd_device  *osd = osd_dev(dt->do_lu.lo_dev);
2963                 struct super_block *sb = osd_sb(osd);
2964                 credits = osd_dto_credits_noquota[DTO_XATTR_SET];
2965                 if (buf && buf->lb_len > sb->s_blocksize) {
2966                         credits *= (buf->lb_len + sb->s_blocksize - 1) >>
2967                                         sb->s_blocksize_bits;
2968                 }
2969         }
2970
2971         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET, credits);
2972
2973         return 0;
2974 }
2975
2976 /*
2977  * Set the 64-bit version for object
2978  */
2979 static void osd_object_version_set(const struct lu_env *env,
2980                                    struct dt_object *dt,
2981                                    dt_obj_version_t *new_version)
2982 {
2983         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2984
2985         CDEBUG(D_INODE, "Set version "LPX64" (old "LPX64") for inode %lu\n",
2986                *new_version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2987
2988         LDISKFS_I(inode)->i_fs_version = *new_version;
2989         /** Version is set after all inode operations are finished,
2990          *  so we should mark it dirty here */
2991         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2992 }
2993
2994 /*
2995  * Concurrency: @dt is write locked.
2996  */
2997 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
2998                          const struct lu_buf *buf, const char *name, int fl,
2999                          struct thandle *handle, struct lustre_capa *capa)
3000 {
3001         struct osd_object      *obj      = osd_dt_obj(dt);
3002         struct inode           *inode    = obj->oo_inode;
3003         struct osd_thread_info *info     = osd_oti_get(env);
3004         int                     fs_flags = 0;
3005         ENTRY;
3006
3007         LASSERT(handle != NULL);
3008
3009         /* version set is not real XATTR */
3010         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
3011                 /* for version we are just using xattr API but change inode
3012                  * field instead */
3013                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
3014                 osd_object_version_set(env, dt, buf->lb_buf);
3015                 return sizeof(dt_obj_version_t);
3016         }
3017
3018         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
3019                 return -EACCES;
3020
3021         CDEBUG(D_INODE, DFID" set xattr '%s' with size %zd\n",
3022                PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
3023
3024         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
3025         if (fl & LU_XATTR_REPLACE)
3026                 fs_flags |= XATTR_REPLACE;
3027
3028         if (fl & LU_XATTR_CREATE)
3029                 fs_flags |= XATTR_CREATE;
3030
3031         if (strcmp(name, XATTR_NAME_LMV) == 0) {
3032                 struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
3033                 int                      rc;
3034
3035                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
3036                 if (rc != 0)
3037                         RETURN(rc);
3038
3039                 lma->lma_incompat |= LMAI_STRIPED;
3040                 lustre_lma_swab(lma);
3041                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3042                                      sizeof(*lma), XATTR_REPLACE);
3043                 if (rc != 0)
3044                         RETURN(rc);
3045         }
3046
3047         return __osd_xattr_set(info, inode, name, buf->lb_buf, buf->lb_len,
3048                                fs_flags);
3049 }
3050
3051 /*
3052  * Concurrency: @dt is read locked.
3053  */
3054 static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
3055                           struct lu_buf *buf, struct lustre_capa *capa)
3056 {
3057         struct osd_object      *obj    = osd_dt_obj(dt);
3058         struct inode           *inode  = obj->oo_inode;
3059         struct osd_thread_info *info   = osd_oti_get(env);
3060         struct dentry          *dentry = &info->oti_obj_dentry;
3061
3062         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3063         LASSERT(inode->i_op != NULL && inode->i_op->listxattr != NULL);
3064
3065         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
3066                 return -EACCES;
3067
3068         dentry->d_inode = inode;
3069         dentry->d_sb = inode->i_sb;
3070         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
3071 }
3072
3073 static int osd_declare_xattr_del(const struct lu_env *env,
3074                                  struct dt_object *dt, const char *name,
3075                                  struct thandle *handle)
3076 {
3077         struct osd_thandle *oh;
3078
3079         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3080         LASSERT(handle != NULL);
3081
3082         oh = container_of0(handle, struct osd_thandle, ot_super);
3083         LASSERT(oh->ot_handle == NULL);
3084
3085         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
3086                              osd_dto_credits_noquota[DTO_XATTR_SET]);
3087
3088         return 0;
3089 }
3090
3091 /*
3092  * Concurrency: @dt is write locked.
3093  */
3094 static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
3095                          const char *name, struct thandle *handle,
3096                          struct lustre_capa *capa)
3097 {
3098         struct osd_object      *obj    = osd_dt_obj(dt);
3099         struct inode           *inode  = obj->oo_inode;
3100         struct osd_thread_info *info   = osd_oti_get(env);
3101         struct dentry          *dentry = &info->oti_obj_dentry;
3102         int                     rc;
3103
3104         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3105         LASSERT(inode->i_op != NULL && inode->i_op->removexattr != NULL);
3106         LASSERT(handle != NULL);
3107
3108         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
3109                 return -EACCES;
3110
3111         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
3112
3113         ll_vfs_dq_init(inode);
3114         dentry->d_inode = inode;
3115         dentry->d_sb = inode->i_sb;
3116         rc = inode->i_op->removexattr(dentry, name);
3117         return rc;
3118 }
3119
3120 static struct obd_capa *osd_capa_get(const struct lu_env *env,
3121                                      struct dt_object *dt,
3122                                      struct lustre_capa *old, __u64 opc)
3123 {
3124         struct osd_thread_info *info = osd_oti_get(env);
3125         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
3126         struct osd_object *obj = osd_dt_obj(dt);
3127         struct osd_device *osd = osd_obj2dev(obj);
3128         struct lustre_capa_key *key = &info->oti_capa_key;
3129         struct lustre_capa *capa = &info->oti_capa;
3130         struct obd_capa *oc;
3131         struct lu_capainfo *lci;
3132         int rc;
3133         ENTRY;
3134
3135         if (!osd->od_fl_capa)
3136                 RETURN(ERR_PTR(-ENOENT));
3137
3138         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3139         LINVRNT(osd_invariant(obj));
3140
3141         /* renewal sanity check */
3142         if (old && osd_object_auth(env, dt, old, opc))
3143                 RETURN(ERR_PTR(-EACCES));
3144
3145         lci = lu_capainfo_get(env);
3146         if (unlikely(lci == NULL))
3147                 RETURN(ERR_PTR(-ENOENT));
3148
3149         switch (lci->lci_auth) {
3150         case LC_ID_NONE:
3151                 RETURN(NULL);
3152         case LC_ID_PLAIN:
3153                 capa->lc_uid = i_uid_read(obj->oo_inode);
3154                 capa->lc_gid = i_gid_read(obj->oo_inode);
3155                 capa->lc_flags = LC_ID_PLAIN;
3156                 break;
3157         case LC_ID_CONVERT: {
3158                 __u32 d[4], s[4];
3159
3160                 s[0] = i_uid_read(obj->oo_inode);
3161                 cfs_get_random_bytes(&(s[1]), sizeof(__u32));
3162                 s[2] = i_uid_read(obj->oo_inode);
3163                 cfs_get_random_bytes(&(s[3]), sizeof(__u32));
3164                 rc = capa_encrypt_id(d, s, key->lk_key, CAPA_HMAC_KEY_MAX_LEN);
3165                 if (unlikely(rc))
3166                         RETURN(ERR_PTR(rc));
3167
3168                 capa->lc_uid   = ((__u64)d[1] << 32) | d[0];
3169                 capa->lc_gid   = ((__u64)d[3] << 32) | d[2];
3170                 capa->lc_flags = LC_ID_CONVERT;
3171                 break;
3172         }
3173         default:
3174                 RETURN(ERR_PTR(-EINVAL));
3175         }
3176
3177         capa->lc_fid = *fid;
3178         capa->lc_opc = opc;
3179         capa->lc_flags |= osd->od_capa_alg << 24;
3180         capa->lc_timeout = osd->od_capa_timeout;
3181         capa->lc_expiry = 0;
3182
3183         oc = capa_lookup(osd->od_capa_hash, capa, 1);
3184         if (oc) {
3185                 LASSERT(!capa_is_expired(oc));
3186                 RETURN(oc);
3187         }
3188
3189         spin_lock(&capa_lock);
3190         *key = osd->od_capa_keys[1];
3191         spin_unlock(&capa_lock);
3192
3193         capa->lc_keyid = key->lk_keyid;
3194         capa->lc_expiry = cfs_time_current_sec() + osd->od_capa_timeout;
3195
3196         rc = capa_hmac(capa->lc_hmac, capa, key->lk_key);
3197         if (rc) {
3198                 DEBUG_CAPA(D_ERROR, capa, "HMAC failed: %d for", rc);
3199                 RETURN(ERR_PTR(rc));
3200         }
3201
3202         oc = capa_add(osd->od_capa_hash, capa);
3203         RETURN(oc);
3204 }
3205
3206 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt,
3207                            __u64 start, __u64 end)
3208 {
3209         struct osd_object       *obj    = osd_dt_obj(dt);
3210         struct inode            *inode  = obj->oo_inode;
3211         struct osd_thread_info  *info   = osd_oti_get(env);
3212         struct dentry           *dentry = &info->oti_obj_dentry;
3213         struct file             *file   = &info->oti_file;
3214         int                     rc;
3215
3216         ENTRY;
3217
3218         dentry->d_inode = inode;
3219         dentry->d_sb = inode->i_sb;
3220         file->f_dentry = dentry;
3221         file->f_mapping = inode->i_mapping;
3222         file->f_op = inode->i_fop;
3223         set_file_inode(file, inode);
3224
3225 #ifdef HAVE_FILE_FSYNC_4ARGS
3226         rc = file->f_op->fsync(file, start, end, 0);
3227 #elif defined(HAVE_FILE_FSYNC_2ARGS)
3228         mutex_lock(&inode->i_mutex);
3229         rc = file->f_op->fsync(file, 0);
3230         mutex_unlock(&inode->i_mutex);
3231 #else
3232         mutex_lock(&inode->i_mutex);
3233         rc = file->f_op->fsync(file, dentry, 0);
3234         mutex_unlock(&inode->i_mutex);
3235 #endif
3236
3237         RETURN(rc);
3238 }
3239
3240 static int osd_data_get(const struct lu_env *env, struct dt_object *dt,
3241                         void **data)
3242 {
3243         struct osd_object *obj = osd_dt_obj(dt);
3244         ENTRY;
3245
3246         *data = (void *)obj->oo_inode;
3247         RETURN(0);
3248 }
3249
3250 /*
3251  * Index operations.
3252  */
3253
3254 static int osd_iam_index_probe(const struct lu_env *env, struct osd_object *o,
3255                            const struct dt_index_features *feat)
3256 {
3257         struct iam_descr *descr;
3258
3259         if (osd_object_is_root(o))
3260                 return feat == &dt_directory_features;
3261
3262         LASSERT(o->oo_dir != NULL);
3263
3264         descr = o->oo_dir->od_container.ic_descr;
3265         if (feat == &dt_directory_features) {
3266                 if (descr->id_rec_size == sizeof(struct osd_fid_pack))
3267                         return 1;
3268                 else
3269                         return 0;
3270         } else {
3271                 return
3272                         feat->dif_keysize_min <= descr->id_key_size &&
3273                         descr->id_key_size <= feat->dif_keysize_max &&
3274                         feat->dif_recsize_min <= descr->id_rec_size &&
3275                         descr->id_rec_size <= feat->dif_recsize_max &&
3276                         !(feat->dif_flags & (DT_IND_VARKEY |
3277                                              DT_IND_VARREC | DT_IND_NONUNQ)) &&
3278                         ergo(feat->dif_flags & DT_IND_UPDATE,
3279                              1 /* XXX check that object (and file system) is
3280                                 * writable */);
3281         }
3282 }
3283
3284 static int osd_iam_container_init(const struct lu_env *env,
3285                                   struct osd_object *obj,
3286                                   struct osd_directory *dir)
3287 {
3288         struct iam_container *bag = &dir->od_container;
3289         int result;
3290
3291         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
3292         if (result != 0)
3293                 return result;
3294
3295         result = iam_container_setup(bag);
3296         if (result == 0)
3297                 obj->oo_dt.do_index_ops = &osd_index_iam_ops;
3298         else
3299                 iam_container_fini(bag);
3300
3301         return result;
3302 }
3303
3304
3305 /*
3306  * Concurrency: no external locking is necessary.
3307  */
3308 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
3309                          const struct dt_index_features *feat)
3310 {
3311         int                      result;
3312         int                      skip_iam = 0;
3313         struct osd_object       *obj = osd_dt_obj(dt);
3314
3315         LINVRNT(osd_invariant(obj));
3316
3317         if (osd_object_is_root(obj)) {
3318                 dt->do_index_ops = &osd_index_ea_ops;
3319                 result = 0;
3320         } else if (feat == &dt_directory_features) {
3321                 dt->do_index_ops = &osd_index_ea_ops;
3322                 if (obj->oo_inode != NULL && S_ISDIR(obj->oo_inode->i_mode))
3323                         result = 0;
3324                 else
3325                         result = -ENOTDIR;
3326                 skip_iam = 1;
3327         } else if (unlikely(feat == &dt_otable_features)) {
3328                 dt->do_index_ops = &osd_otable_ops;
3329                 return 0;
3330         } else if (unlikely(feat == &dt_acct_features)) {
3331                 dt->do_index_ops = &osd_acct_index_ops;
3332                 result = 0;
3333                 skip_iam = 1;
3334         } else if (!osd_has_index(obj)) {
3335                 struct osd_directory *dir;
3336
3337                 OBD_ALLOC_PTR(dir);
3338                 if (dir != NULL) {
3339
3340                         spin_lock(&obj->oo_guard);
3341                         if (obj->oo_dir == NULL)
3342                                 obj->oo_dir = dir;
3343                         else
3344                                 /*
3345                                  * Concurrent thread allocated container data.
3346                                  */
3347                                 OBD_FREE_PTR(dir);
3348                         spin_unlock(&obj->oo_guard);
3349                         /*
3350                          * Now, that we have container data, serialize its
3351                          * initialization.
3352                          */
3353                         down_write(&obj->oo_ext_idx_sem);
3354                         /*
3355                          * recheck under lock.
3356                          */
3357                         if (!osd_has_index(obj))
3358                                 result = osd_iam_container_init(env, obj,
3359                                                                 obj->oo_dir);
3360                         else
3361                                 result = 0;
3362                         up_write(&obj->oo_ext_idx_sem);
3363                 } else {
3364                         result = -ENOMEM;
3365                 }
3366         } else {
3367                 result = 0;
3368         }
3369
3370         if (result == 0 && skip_iam == 0) {
3371                 if (!osd_iam_index_probe(env, obj, feat))
3372                         result = -ENOTDIR;
3373         }
3374         LINVRNT(osd_invariant(obj));
3375
3376         if (result == 0 && is_quota_glb_feat(feat) &&
3377             fid_seq(lu_object_fid(&dt->do_lu)) == FID_SEQ_QUOTA_GLB)
3378                 result = osd_quota_migration(env, dt, feat);
3379
3380         return result;
3381 }
3382
3383 static int osd_otable_it_attr_get(const struct lu_env *env,
3384                                  struct dt_object *dt,
3385                                  struct lu_attr *attr,
3386                                  struct lustre_capa *capa)
3387 {
3388         attr->la_valid = 0;
3389         return 0;
3390 }
3391
3392 static const struct dt_object_operations osd_obj_ops = {
3393         .do_read_lock         = osd_object_read_lock,
3394         .do_write_lock        = osd_object_write_lock,
3395         .do_read_unlock       = osd_object_read_unlock,
3396         .do_write_unlock      = osd_object_write_unlock,
3397         .do_write_locked      = osd_object_write_locked,
3398         .do_attr_get          = osd_attr_get,
3399         .do_declare_attr_set  = osd_declare_attr_set,
3400         .do_attr_set          = osd_attr_set,
3401         .do_ah_init           = osd_ah_init,
3402         .do_declare_create    = osd_declare_object_create,
3403         .do_create            = osd_object_create,
3404         .do_declare_destroy   = osd_declare_object_destroy,
3405         .do_destroy           = osd_object_destroy,
3406         .do_index_try         = osd_index_try,
3407         .do_declare_ref_add   = osd_declare_object_ref_add,
3408         .do_ref_add           = osd_object_ref_add,
3409         .do_declare_ref_del   = osd_declare_object_ref_del,
3410         .do_ref_del           = osd_object_ref_del,
3411         .do_xattr_get         = osd_xattr_get,
3412         .do_declare_xattr_set = osd_declare_xattr_set,
3413         .do_xattr_set         = osd_xattr_set,
3414         .do_declare_xattr_del = osd_declare_xattr_del,
3415         .do_xattr_del         = osd_xattr_del,
3416         .do_xattr_list        = osd_xattr_list,
3417         .do_capa_get          = osd_capa_get,
3418         .do_object_sync       = osd_object_sync,
3419         .do_data_get          = osd_data_get,
3420 };
3421
3422 /**
3423  * dt_object_operations for interoperability mode
3424  * (i.e. to run 2.0 mds on 1.8 disk) (b11826)
3425  */
3426 static const struct dt_object_operations osd_obj_ea_ops = {
3427         .do_read_lock         = osd_object_read_lock,
3428         .do_write_lock        = osd_object_write_lock,
3429         .do_read_unlock       = osd_object_read_unlock,
3430         .do_write_unlock      = osd_object_write_unlock,
3431         .do_write_locked      = osd_object_write_locked,
3432         .do_attr_get          = osd_attr_get,
3433         .do_declare_attr_set  = osd_declare_attr_set,
3434         .do_attr_set          = osd_attr_set,
3435         .do_ah_init           = osd_ah_init,
3436         .do_declare_create    = osd_declare_object_create,
3437         .do_create            = osd_object_ea_create,
3438         .do_declare_destroy   = osd_declare_object_destroy,
3439         .do_destroy           = osd_object_destroy,
3440         .do_index_try         = osd_index_try,
3441         .do_declare_ref_add   = osd_declare_object_ref_add,
3442         .do_ref_add           = osd_object_ref_add,
3443         .do_declare_ref_del   = osd_declare_object_ref_del,
3444         .do_ref_del           = osd_object_ref_del,
3445         .do_xattr_get         = osd_xattr_get,
3446         .do_declare_xattr_set = osd_declare_xattr_set,
3447         .do_xattr_set         = osd_xattr_set,
3448         .do_declare_xattr_del = osd_declare_xattr_del,
3449         .do_xattr_del         = osd_xattr_del,
3450         .do_xattr_list        = osd_xattr_list,
3451         .do_capa_get          = osd_capa_get,
3452         .do_object_sync       = osd_object_sync,
3453         .do_data_get          = osd_data_get,
3454 };
3455
3456 static const struct dt_object_operations osd_obj_otable_it_ops = {
3457         .do_attr_get    = osd_otable_it_attr_get,
3458         .do_index_try   = osd_index_try,
3459 };
3460
3461 static int osd_index_declare_iam_delete(const struct lu_env *env,
3462                                         struct dt_object *dt,
3463                                         const struct dt_key *key,
3464                                         struct thandle *handle)
3465 {
3466         struct osd_thandle    *oh;
3467
3468         oh = container_of0(handle, struct osd_thandle, ot_super);
3469         LASSERT(oh->ot_handle == NULL);
3470
3471         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3472                              osd_dto_credits_noquota[DTO_INDEX_DELETE]);
3473
3474         return 0;
3475 }
3476
3477 /**
3478  *      delete a (key, value) pair from index \a dt specified by \a key
3479  *
3480  *      \param  dt      osd index object
3481  *      \param  key     key for index
3482  *      \param  rec     record reference
3483  *      \param  handle  transaction handler
3484  *
3485  *      \retval  0  success
3486  *      \retval -ve   failure
3487  */
3488
3489 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
3490                                 const struct dt_key *key,
3491                                 struct thandle *handle,
3492                                 struct lustre_capa *capa)
3493 {
3494         struct osd_thread_info *oti = osd_oti_get(env);
3495         struct osd_object      *obj = osd_dt_obj(dt);
3496         struct osd_thandle     *oh;
3497         struct iam_path_descr  *ipd;
3498         struct iam_container   *bag = &obj->oo_dir->od_container;
3499         int                     rc;
3500
3501         ENTRY;
3502
3503         LINVRNT(osd_invariant(obj));
3504         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3505         LASSERT(bag->ic_object == obj->oo_inode);
3506         LASSERT(handle != NULL);
3507
3508         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
3509                 RETURN(-EACCES);
3510
3511         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
3512
3513         ipd = osd_idx_ipd_get(env, bag);
3514         if (unlikely(ipd == NULL))
3515                 RETURN(-ENOMEM);
3516
3517         oh = container_of0(handle, struct osd_thandle, ot_super);
3518         LASSERT(oh->ot_handle != NULL);
3519         LASSERT(oh->ot_handle->h_transaction != NULL);
3520
3521         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
3522                 /* swab quota uid/gid provided by caller */
3523                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
3524                 key = (const struct dt_key *)&oti->oti_quota_id;
3525         }
3526
3527         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
3528         osd_ipd_put(env, bag, ipd);
3529         LINVRNT(osd_invariant(obj));
3530         RETURN(rc);
3531 }
3532
3533 static int osd_index_declare_ea_delete(const struct lu_env *env,
3534                                        struct dt_object *dt,
3535                                        const struct dt_key *key,
3536                                        struct thandle *handle)
3537 {
3538         struct osd_thandle *oh;
3539         struct inode       *inode;
3540         int                 rc;
3541         ENTRY;
3542
3543         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3544         LASSERT(handle != NULL);
3545
3546         oh = container_of0(handle, struct osd_thandle, ot_super);
3547         LASSERT(oh->ot_handle == NULL);
3548
3549         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3550                              osd_dto_credits_noquota[DTO_INDEX_DELETE]);
3551
3552         inode = osd_dt_obj(dt)->oo_inode;
3553         LASSERT(inode);
3554
3555         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3556                                    0, oh, true, true, NULL, false);
3557         RETURN(rc);
3558 }
3559
3560 static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
3561                                           struct dt_rec *fid)
3562 {
3563         struct osd_fid_pack *rec;
3564         int                  rc = -ENODATA;
3565
3566         if (de->file_type & LDISKFS_DIRENT_LUFID) {
3567                 rec = (struct osd_fid_pack *) (de->name + de->name_len + 1);
3568                 rc = osd_fid_unpack((struct lu_fid *)fid, rec);
3569         }
3570         return rc;
3571 }
3572
3573 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
3574                           const struct lu_fid *fid)
3575 {
3576         struct seq_server_site  *ss = osd_seq_site(osd);
3577         ENTRY;
3578
3579         /* FID seqs not in FLDB, must be local seq */
3580         if (unlikely(!fid_seq_in_fldb(fid_seq(fid))))
3581                 RETURN(0);
3582
3583         /* If FLD is not being initialized yet, it only happens during the
3584          * initialization, likely during mgs initialization, and we assume
3585          * this is local FID. */
3586         if (ss == NULL || ss->ss_server_fld == NULL)
3587                 RETURN(0);
3588
3589         /* Only check the local FLDB here */
3590         if (osd_seq_exists(env, osd, fid_seq(fid)))
3591                 RETURN(0);
3592
3593         RETURN(1);
3594 }
3595
3596 /**
3597  * Index delete function for interoperability mode (b11826).
3598  * It will remove the directory entry added by osd_index_ea_insert().
3599  * This entry is needed to maintain name->fid mapping.
3600  *
3601  * \param key,  key i.e. file entry to be deleted
3602  *
3603  * \retval   0, on success
3604  * \retval -ve, on error
3605  */
3606 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
3607                                const struct dt_key *key,
3608                                struct thandle *handle,
3609                                struct lustre_capa *capa)
3610 {
3611         struct osd_object          *obj    = osd_dt_obj(dt);
3612         struct inode               *dir    = obj->oo_inode;
3613         struct dentry              *dentry;
3614         struct osd_thandle         *oh;
3615         struct ldiskfs_dir_entry_2 *de = NULL;
3616         struct buffer_head         *bh;
3617         struct htree_lock          *hlock = NULL;
3618         struct lu_fid              *fid = &osd_oti_get(env)->oti_fid;
3619         struct osd_device          *osd = osd_dev(dt->do_lu.lo_dev);
3620         int                        rc;
3621         ENTRY;
3622
3623         LINVRNT(osd_invariant(obj));
3624         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3625         LASSERT(handle != NULL);
3626
3627         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
3628
3629         oh = container_of(handle, struct osd_thandle, ot_super);
3630         LASSERT(oh->ot_handle != NULL);
3631         LASSERT(oh->ot_handle->h_transaction != NULL);
3632
3633         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
3634                 RETURN(-EACCES);
3635
3636         ll_vfs_dq_init(dir);
3637         dentry = osd_child_dentry_get(env, obj,
3638                                       (char *)key, strlen((char *)key));
3639
3640         if (obj->oo_hl_head != NULL) {
3641                 hlock = osd_oti_get(env)->oti_hlock;
3642                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
3643                                    dir, LDISKFS_HLOCK_DEL);
3644         } else {
3645                 down_write(&obj->oo_ext_idx_sem);
3646         }
3647
3648         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
3649         if (bh) {
3650                 __u32 ino = 0;
3651
3652                 /* If this is not the ".." entry, it might be a remote DNE
3653                  * entry and  we need to check if the FID is for a remote
3654                  * MDT.  If the FID is  not in the directory entry (e.g.
3655                  * upgraded 1.8 filesystem without dirdata enabled) then
3656                  * we need to get the FID from the LMA. For a remote directory
3657                  * there HAS to be an LMA, it cannot be an IGIF inode in this
3658                  * case.
3659                  *
3660                  * Delete the entry before the agent inode in order to
3661                  * simplify error handling.  At worst an error after deleting
3662                  * the entry first might leak the agent inode afterward. The
3663                  * reverse would need filesystem abort in case of error deleting
3664                  * the entry after the agent had been removed, or leave a
3665                  * dangling entry pointing at a random inode. */
3666                 if (strcmp((char *)key, dotdot) != 0) {
3667                         LASSERT(de != NULL);
3668                         rc = osd_get_fid_from_dentry(de, (struct dt_rec *)fid);
3669                         /* If Fid is not in dentry, try to get it from LMA */
3670                         if (rc == -ENODATA) {
3671                                 struct osd_inode_id *id;
3672                                 struct inode *inode;
3673
3674                                 /* Before trying to get fid from the inode,
3675                                  * check whether the inode is valid.
3676                                  *
3677                                  * If the inode has been deleted, do not go
3678                                  * ahead to do osd_ea_fid_get, which will set
3679                                  * the inode to bad inode, which might cause
3680                                  * the inode to be deleted uncorrectly */
3681                                 inode = ldiskfs_iget(osd_sb(osd),
3682                                                      le32_to_cpu(de->inode));
3683                                 if (IS_ERR(inode)) {
3684                                         CDEBUG(D_INODE, "%s: "DFID"get inode"
3685                                                "error.\n", osd_name(osd),
3686                                                PFID(fid));
3687                                         rc = PTR_ERR(inode);
3688                                 } else {
3689                                         if (likely(inode->i_nlink != 0)) {
3690                                                 id = &osd_oti_get(env)->oti_id;
3691                                                 rc = osd_ea_fid_get(env, obj,
3692                                                         le32_to_cpu(de->inode),
3693                                                                     fid, id);
3694                                         } else {
3695                                                 CDEBUG(D_INFO, "%s: %u "DFID
3696                                                        "deleted.\n",
3697                                                        osd_name(osd),
3698                                                        le32_to_cpu(de->inode),
3699                                                        PFID(fid));
3700                                                 rc = -ESTALE;
3701                                         }
3702                                         iput(inode);
3703                                 }
3704                         }
3705                         if (rc == 0 &&
3706                             unlikely(osd_remote_fid(env, osd, fid)))
3707                                 /* Need to delete agent inode */
3708                                 ino = le32_to_cpu(de->inode);
3709                 }
3710                 rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
3711                 brelse(bh);
3712                 if (rc == 0 && unlikely(ino != 0)) {
3713                         rc = osd_delete_local_agent_inode(env, osd, fid, ino,
3714                                                           oh);
3715                         if (rc != 0)
3716                                 CERROR("%s: del local inode "DFID": rc = %d\n",
3717                                        osd_name(osd), PFID(fid), rc);
3718                 }
3719         } else {
3720                 rc = -ENOENT;
3721         }
3722         if (hlock != NULL)
3723                 ldiskfs_htree_unlock(hlock);
3724         else
3725                 up_write(&obj->oo_ext_idx_sem);
3726
3727         if (rc != 0)
3728                 GOTO(out, rc);
3729
3730         /* For inode on the remote MDT, .. will point to
3731          * /Agent directory, Check whether it needs to delete
3732          * from agent directory */
3733         if (unlikely(strcmp((char *)key, dotdot) == 0)) {
3734                 rc = osd_delete_from_remote_parent(env, osd_obj2dev(obj), obj,
3735                                                    oh);
3736                 if (rc != 0 && rc != -ENOENT) {
3737                         CERROR("%s: delete agent inode "DFID": rc = %d\n",
3738                                osd_name(osd), PFID(fid), rc);
3739                 }
3740
3741                 if (rc == -ENOENT)
3742                         rc = 0;
3743
3744                 GOTO(out, rc);
3745         }
3746 out:
3747
3748         LASSERT(osd_invariant(obj));
3749         RETURN(rc);
3750 }
3751
3752 /**
3753  *      Lookup index for \a key and copy record to \a rec.
3754  *
3755  *      \param  dt      osd index object
3756  *      \param  key     key for index
3757  *      \param  rec     record reference
3758  *
3759  *      \retval  +ve  success : exact mach
3760  *      \retval  0    return record with key not greater than \a key
3761  *      \retval -ve   failure
3762  */
3763 static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
3764                                 struct dt_rec *rec, const struct dt_key *key,
3765                                 struct lustre_capa *capa)
3766 {
3767         struct osd_object      *obj = osd_dt_obj(dt);
3768         struct iam_path_descr  *ipd;
3769         struct iam_container   *bag = &obj->oo_dir->od_container;
3770         struct osd_thread_info *oti = osd_oti_get(env);
3771         struct iam_iterator    *it = &oti->oti_idx_it;
3772         struct iam_rec         *iam_rec;
3773         int                     rc;
3774
3775         ENTRY;
3776
3777         LASSERT(osd_invariant(obj));
3778         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3779         LASSERT(bag->ic_object == obj->oo_inode);
3780
3781         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_LOOKUP))
3782                 RETURN(-EACCES);
3783
3784         ipd = osd_idx_ipd_get(env, bag);
3785         if (IS_ERR(ipd))
3786                 RETURN(-ENOMEM);
3787
3788         /* got ipd now we can start iterator. */
3789         iam_it_init(it, bag, 0, ipd);
3790
3791         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
3792                 /* swab quota uid/gid provided by caller */
3793                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
3794                 key = (const struct dt_key *)&oti->oti_quota_id;
3795         }
3796
3797         rc = iam_it_get(it, (struct iam_key *)key);
3798         if (rc >= 0) {
3799                 if (S_ISDIR(obj->oo_inode->i_mode))
3800                         iam_rec = (struct iam_rec *)oti->oti_ldp;
3801                 else
3802                         iam_rec = (struct iam_rec *) rec;
3803
3804                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)iam_rec);
3805
3806                 if (S_ISDIR(obj->oo_inode->i_mode))
3807                         osd_fid_unpack((struct lu_fid *) rec,
3808                                        (struct osd_fid_pack *)iam_rec);
3809                 else if (fid_is_quota(lu_object_fid(&dt->do_lu)))
3810                         osd_quota_unpack(obj, rec);
3811         }
3812
3813         iam_it_put(it);
3814         iam_it_fini(it);
3815         osd_ipd_put(env, bag, ipd);
3816
3817         LINVRNT(osd_invariant(obj));
3818
3819         RETURN(rc);
3820 }
3821
3822 static int osd_index_declare_iam_insert(const struct lu_env *env,
3823                                         struct dt_object *dt,
3824                                         const struct dt_rec *rec,
3825                                         const struct dt_key *key,
3826                                         struct thandle *handle)
3827 {
3828         struct osd_thandle *oh;
3829
3830         LASSERT(handle != NULL);
3831
3832         oh = container_of0(handle, struct osd_thandle, ot_super);
3833         LASSERT(oh->ot_handle == NULL);
3834
3835         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3836                              osd_dto_credits_noquota[DTO_INDEX_INSERT]);
3837
3838         return 0;
3839 }
3840
3841 /**
3842  *      Inserts (key, value) pair in \a dt index object.
3843  *
3844  *      \param  dt      osd index object
3845  *      \param  key     key for index
3846  *      \param  rec     record reference
3847  *      \param  th      transaction handler
3848  *
3849  *      \retval  0  success
3850  *      \retval -ve failure
3851  */
3852 static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
3853                                 const struct dt_rec *rec,
3854                                 const struct dt_key *key, struct thandle *th,
3855                                 struct lustre_capa *capa, int ignore_quota)
3856 {
3857         struct osd_object     *obj = osd_dt_obj(dt);
3858         struct iam_path_descr *ipd;
3859         struct osd_thandle    *oh;
3860         struct iam_container  *bag = &obj->oo_dir->od_container;
3861         struct osd_thread_info *oti = osd_oti_get(env);
3862         struct iam_rec         *iam_rec;
3863         int                     rc;
3864
3865         ENTRY;
3866
3867         LINVRNT(osd_invariant(obj));
3868         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3869         LASSERT(bag->ic_object == obj->oo_inode);
3870         LASSERT(th != NULL);
3871
3872         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
3873                 RETURN(-EACCES);
3874
3875         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3876
3877         ipd = osd_idx_ipd_get(env, bag);
3878         if (unlikely(ipd == NULL))
3879                 RETURN(-ENOMEM);
3880
3881         oh = container_of0(th, struct osd_thandle, ot_super);
3882         LASSERT(oh->ot_handle != NULL);
3883         LASSERT(oh->ot_handle->h_transaction != NULL);
3884         if (S_ISDIR(obj->oo_inode->i_mode)) {
3885                 iam_rec = (struct iam_rec *)oti->oti_ldp;
3886                 osd_fid_pack((struct osd_fid_pack *)iam_rec, rec, &oti->oti_fid);
3887         } else if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
3888                 /* pack quota uid/gid */
3889                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
3890                 key = (const struct dt_key *)&oti->oti_quota_id;
3891                 /* pack quota record */
3892                 rec = osd_quota_pack(obj, rec, &oti->oti_quota_rec);
3893                 iam_rec = (struct iam_rec *)rec;
3894         } else {
3895                 iam_rec = (struct iam_rec *)rec;
3896         }
3897
3898         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
3899                         iam_rec, ipd);
3900         osd_ipd_put(env, bag, ipd);
3901         LINVRNT(osd_invariant(obj));
3902         RETURN(rc);
3903 }
3904
3905 /**
3906  * Calls ldiskfs_add_entry() to add directory entry
3907  * into the directory. This is required for
3908  * interoperability mode (b11826)
3909  *
3910  * \retval   0, on success
3911  * \retval -ve, on error
3912  */
3913 static int __osd_ea_add_rec(struct osd_thread_info *info,
3914                             struct osd_object *pobj, struct inode  *cinode,
3915                             const char *name, const struct lu_fid *fid,
3916                             struct htree_lock *hlock, struct thandle *th)
3917 {
3918         struct ldiskfs_dentry_param *ldp;
3919         struct dentry               *child;
3920         struct osd_thandle          *oth;
3921         int                          rc;
3922
3923         oth = container_of(th, struct osd_thandle, ot_super);
3924         LASSERT(oth->ot_handle != NULL);
3925         LASSERT(oth->ot_handle->h_transaction != NULL);
3926         LASSERT(pobj->oo_inode);
3927
3928         ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
3929         if (unlikely(pobj->oo_inode ==
3930                      osd_sb(osd_obj2dev(pobj))->s_root->d_inode))
3931                 ldp->edp_magic = 0;
3932         else
3933                 osd_get_ldiskfs_dirent_param(ldp, fid);
3934         child = osd_child_dentry_get(info->oti_env, pobj, name, strlen(name));
3935         child->d_fsdata = (void *)ldp;
3936         ll_vfs_dq_init(pobj->oo_inode);
3937         rc = osd_ldiskfs_add_entry(oth->ot_handle, child, cinode, hlock);
3938
3939         RETURN(rc);
3940 }
3941
3942 /**
3943  * Calls ldiskfs_add_dot_dotdot() to add dot and dotdot entries
3944  * into the directory.Also sets flags into osd object to
3945  * indicate dot and dotdot are created. This is required for
3946  * interoperability mode (b11826)
3947  *
3948  * \param dir   directory for dot and dotdot fixup.
3949  * \param obj   child object for linking
3950  *
3951  * \retval   0, on success
3952  * \retval -ve, on error
3953  */
3954 static int osd_add_dot_dotdot(struct osd_thread_info *info,
3955                               struct osd_object *dir,
3956                               struct inode *parent_dir, const char *name,
3957                               const struct lu_fid *dot_fid,
3958                               const struct lu_fid *dot_dot_fid,
3959                               struct thandle *th)
3960 {
3961         struct inode                *inode = dir->oo_inode;
3962         struct osd_thandle          *oth;
3963         int result = 0;
3964
3965         oth = container_of(th, struct osd_thandle, ot_super);
3966         LASSERT(oth->ot_handle->h_transaction != NULL);
3967         LASSERT(S_ISDIR(dir->oo_inode->i_mode));
3968
3969         if (strcmp(name, dot) == 0) {
3970                 if (dir->oo_compat_dot_created) {
3971                         result = -EEXIST;
3972                 } else {
3973                         LASSERT(inode == parent_dir);
3974                         dir->oo_compat_dot_created = 1;
3975                         result = 0;
3976                 }
3977         } else if (strcmp(name, dotdot) == 0) {
3978                 if (!dir->oo_compat_dot_created)
3979                         return -EINVAL;
3980                 /* in case of rename, dotdot is already created */
3981                 if (dir->oo_compat_dotdot_created) {
3982                         return __osd_ea_add_rec(info, dir, parent_dir, name,
3983                                                 dot_dot_fid, NULL, th);
3984                 }
3985
3986                 result = osd_add_dot_dotdot_internal(info, dir->oo_inode,
3987                                                      parent_dir, dot_fid,
3988                                                      dot_dot_fid, oth);
3989                 if (result == 0)
3990                         dir->oo_compat_dotdot_created = 1;
3991         }
3992
3993         return result;
3994 }
3995
3996
3997 /**
3998  * It will call the appropriate osd_add* function and return the
3999  * value, return by respective functions.
4000  */
4001 static int osd_ea_add_rec(const struct lu_env *env, struct osd_object *pobj,
4002                           struct inode *cinode, const char *name,
4003                           const struct lu_fid *fid, struct thandle *th)
4004 {
4005         struct osd_thread_info *info   = osd_oti_get(env);
4006         struct htree_lock      *hlock;
4007         int                     rc;
4008
4009         hlock = pobj->oo_hl_head != NULL ? info->oti_hlock : NULL;
4010
4011         if (name[0] == '.' && (name[1] == '\0' || (name[1] == '.' &&
4012                                                    name[2] =='\0'))) {
4013                 if (hlock != NULL) {
4014                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
4015                                            pobj->oo_inode, 0);
4016                 } else {
4017                         down_write(&pobj->oo_ext_idx_sem);
4018                 }
4019
4020                 rc = osd_add_dot_dotdot(info, pobj, cinode, name,
4021                                         lu_object_fid(&pobj->oo_dt.do_lu),
4022                                         fid, th);
4023         } else {
4024                 if (hlock != NULL) {
4025                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
4026                                            pobj->oo_inode, LDISKFS_HLOCK_ADD);
4027                 } else {
4028                         down_write(&pobj->oo_ext_idx_sem);
4029                 }
4030
4031                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_INDIR)) {
4032                         struct lu_fid *tfid = &info->oti_fid;
4033
4034                         *tfid = *fid;
4035                         tfid->f_ver = ~0;
4036                         rc = __osd_ea_add_rec(info, pobj, cinode, name,
4037                                               tfid, hlock, th);
4038                 } else {
4039                         rc = __osd_ea_add_rec(info, pobj, cinode, name, fid,
4040                                               hlock, th);
4041                 }
4042         }
4043         if (hlock != NULL)
4044                 ldiskfs_htree_unlock(hlock);
4045         else
4046                 up_write(&pobj->oo_ext_idx_sem);
4047
4048         return rc;
4049 }
4050
4051 static void
4052 osd_consistency_check(struct osd_thread_info *oti, struct osd_device *dev,
4053                       struct osd_idmap_cache *oic)
4054 {
4055         struct osd_scrub    *scrub = &dev->od_scrub;
4056         struct lu_fid       *fid   = &oic->oic_fid;
4057         struct osd_inode_id *id    = &oti->oti_id;
4058         int                  once  = 0;
4059         int                  rc;
4060         ENTRY;
4061
4062         if (!fid_is_norm(fid) && !fid_is_igif(fid))
4063                 RETURN_EXIT;
4064
4065 again:
4066         rc = osd_oi_lookup(oti, dev, fid, id, OI_CHECK_FLD);
4067         if (rc != 0 && rc != -ENOENT)
4068                 RETURN_EXIT;
4069
4070         if (rc == 0 && osd_id_eq(id, &oic->oic_lid))
4071                 RETURN_EXIT;
4072
4073         if (thread_is_running(&scrub->os_thread)) {
4074                 rc = osd_oii_insert(dev, oic, rc == -ENOENT);
4075                 /* There is race condition between osd_oi_lookup and OI scrub.
4076                  * The OI scrub finished just after osd_oi_lookup() failure.
4077                  * Under such case, it is unnecessary to trigger OI scrub again,
4078                  * but try to call osd_oi_lookup() again. */
4079                 if (unlikely(rc == -EAGAIN))
4080                         goto again;
4081
4082                 RETURN_EXIT;
4083         }
4084
4085         if (!dev->od_noscrub && ++once == 1) {
4086                 rc = osd_scrub_start(dev);
4087                 LCONSOLE_WARN("%.16s: trigger OI scrub by RPC for "DFID
4088                               ", rc = %d [2]\n",
4089                               LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
4090                               PFID(fid), rc);
4091                 if (rc == 0)
4092                         goto again;
4093         }
4094
4095         EXIT;
4096 }
4097
4098 static int osd_fail_fid_lookup(struct osd_thread_info *oti,
4099                                struct osd_device *dev,
4100                                struct osd_idmap_cache *oic,
4101                                struct lu_fid *fid, __u32 ino)
4102 {
4103         struct lustre_mdt_attrs *lma   = &oti->oti_mdt_attrs;
4104         struct inode            *inode;
4105         int                      rc;
4106
4107         osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
4108         inode = osd_iget(oti, dev, &oic->oic_lid);
4109         if (IS_ERR(inode)) {
4110                 fid_zero(&oic->oic_fid);
4111                 return PTR_ERR(inode);
4112         }
4113
4114         rc = osd_get_lma(oti, inode, &oti->oti_obj_dentry, lma);
4115         iput(inode);
4116         if (rc != 0)
4117                 fid_zero(&oic->oic_fid);
4118         else
4119                 *fid = oic->oic_fid = lma->lma_self_fid;
4120         return rc;
4121 }
4122
4123 int osd_add_oi_cache(struct osd_thread_info *info, struct osd_device *osd,
4124                      struct osd_inode_id *id, const struct lu_fid *fid)
4125 {
4126         CDEBUG(D_INODE, "add "DFID" %u:%u to info %p\n", PFID(fid),
4127                id->oii_ino, id->oii_gen, info);
4128         info->oti_cache.oic_lid = *id;
4129         info->oti_cache.oic_fid = *fid;
4130         info->oti_cache.oic_dev = osd;
4131
4132         return 0;
4133 }
4134
4135 /**
4136  * Calls ->lookup() to find dentry. From dentry get inode and
4137  * read inode's ea to get fid. This is required for  interoperability
4138  * mode (b11826)
4139  *
4140  * \retval   0, on success
4141  * \retval -ve, on error
4142  */
4143 static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
4144                              struct dt_rec *rec, const struct dt_key *key)
4145 {
4146         struct inode               *dir    = obj->oo_inode;
4147         struct dentry              *dentry;
4148         struct ldiskfs_dir_entry_2 *de;
4149         struct buffer_head         *bh;
4150         struct lu_fid              *fid = (struct lu_fid *) rec;
4151         struct htree_lock          *hlock = NULL;
4152         int                         ino;
4153         int                         rc;
4154         ENTRY;
4155
4156         LASSERT(dir->i_op != NULL && dir->i_op->lookup != NULL);
4157
4158         dentry = osd_child_dentry_get(env, obj,
4159                                       (char *)key, strlen((char *)key));
4160
4161         if (obj->oo_hl_head != NULL) {
4162                 hlock = osd_oti_get(env)->oti_hlock;
4163                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
4164                                    dir, LDISKFS_HLOCK_LOOKUP);
4165         } else {
4166                 down_read(&obj->oo_ext_idx_sem);
4167         }
4168
4169         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
4170         if (bh) {
4171                 struct osd_thread_info *oti = osd_oti_get(env);
4172                 struct osd_inode_id *id = &oti->oti_id;
4173                 struct osd_idmap_cache *oic = &oti->oti_cache;
4174                 struct osd_device *dev = osd_obj2dev(obj);
4175                 struct osd_scrub *scrub = &dev->od_scrub;
4176                 struct scrub_file *sf = &scrub->os_file;
4177
4178                 ino = le32_to_cpu(de->inode);
4179                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP)) {
4180                         brelse(bh);
4181                         rc = osd_fail_fid_lookup(oti, dev, oic, fid, ino);
4182                         GOTO(out, rc);
4183                 }
4184
4185                 rc = osd_get_fid_from_dentry(de, rec);
4186
4187                 /* done with de, release bh */
4188                 brelse(bh);
4189                 if (rc != 0)
4190                         rc = osd_ea_fid_get(env, obj, ino, fid, id);
4191                 else
4192                         osd_id_gen(id, ino, OSD_OII_NOGEN);
4193                 if (rc != 0) {
4194                         fid_zero(&oic->oic_fid);
4195                         GOTO(out, rc);
4196                 }
4197
4198                 if (osd_remote_fid(env, dev, fid))
4199                         GOTO(out, rc = 0);
4200
4201                 rc = osd_add_oi_cache(osd_oti_get(env), osd_obj2dev(obj), id,
4202                                       fid);
4203                 if (rc != 0)
4204                         GOTO(out, rc);
4205                 if ((scrub->os_pos_current <= ino) &&
4206                     ((sf->sf_flags & SF_INCONSISTENT) ||
4207                      (sf->sf_flags & SF_UPGRADE && fid_is_igif(fid)) ||
4208                      ldiskfs_test_bit(osd_oi_fid2idx(dev, fid),
4209                                       sf->sf_oi_bitmap)))
4210                         osd_consistency_check(oti, dev, oic);
4211         } else {
4212                 rc = -ENOENT;
4213         }
4214
4215         GOTO(out, rc);
4216
4217 out:
4218         if (hlock != NULL)
4219                 ldiskfs_htree_unlock(hlock);
4220         else
4221                 up_read(&obj->oo_ext_idx_sem);
4222         return rc;
4223 }
4224
4225 /**
4226  * Find the osd object for given fid.
4227  *
4228  * \param fid need to find the osd object having this fid
4229  *
4230  * \retval osd_object on success
4231  * \retval        -ve on error
4232  */
4233 struct osd_object *osd_object_find(const struct lu_env *env,
4234                                    struct dt_object *dt,
4235                                    const struct lu_fid *fid)
4236 {
4237         struct lu_device  *ludev = dt->do_lu.lo_dev;
4238         struct osd_object *child = NULL;
4239         struct lu_object  *luch;
4240         struct lu_object  *lo;
4241
4242         /*
4243          * at this point topdev might not exist yet
4244          * (i.e. MGS is preparing profiles). so we can
4245          * not rely on topdev and instead lookup with
4246          * our device passed as topdev. this can't work
4247          * if the object isn't cached yet (as osd doesn't
4248          * allocate lu_header). IOW, the object must be
4249          * in the cache, otherwise lu_object_alloc() crashes
4250          * -bzzz
4251          */
4252         luch = lu_object_find_at(env, ludev->ld_site->ls_top_dev == NULL ?
4253                                  ludev : ludev->ld_site->ls_top_dev,
4254                                  fid, NULL);
4255         if (!IS_ERR(luch)) {
4256                 if (lu_object_exists(luch)) {
4257                         lo = lu_object_locate(luch->lo_header, ludev->ld_type);
4258                         if (lo != NULL)
4259                                 child = osd_obj(lo);
4260                         else
4261                                 LU_OBJECT_DEBUG(D_ERROR, env, luch,
4262                                                 "lu_object can't be located"
4263                                                 DFID"\n", PFID(fid));
4264
4265                         if (child == NULL) {
4266                                 lu_object_put(env, luch);
4267                                 CERROR("Unable to get osd_object\n");
4268                                 child = ERR_PTR(-ENOENT);
4269                         }
4270                 } else {
4271                         LU_OBJECT_DEBUG(D_ERROR, env, luch,
4272                                         "lu_object does not exists "DFID"\n",
4273                                         PFID(fid));
4274                         lu_object_put(env, luch);
4275                         child = ERR_PTR(-ENOENT);
4276                 }
4277         } else {
4278                 child = ERR_CAST(luch);
4279         }
4280
4281         return child;
4282 }
4283
4284 /**
4285  * Put the osd object once done with it.
4286  *
4287  * \param obj osd object that needs to be put
4288  */
4289 static inline void osd_object_put(const struct lu_env *env,
4290                                   struct osd_object *obj)
4291 {
4292         lu_object_put(env, &obj->oo_dt.do_lu);
4293 }
4294
4295 static int osd_index_declare_ea_insert(const struct lu_env *env,
4296                                        struct dt_object *dt,
4297                                        const struct dt_rec *rec,
4298                                        const struct dt_key *key,
4299                                        struct thandle *handle)
4300 {
4301         struct osd_thandle      *oh;
4302         struct osd_device       *osd   = osd_dev(dt->do_lu.lo_dev);
4303         struct lu_fid           *fid = (struct lu_fid *)rec;
4304         int                     rc;
4305         ENTRY;
4306
4307         LASSERT(!dt_object_remote(dt));
4308         LASSERT(handle != NULL);
4309
4310         oh = container_of0(handle, struct osd_thandle, ot_super);
4311         LASSERT(oh->ot_handle == NULL);
4312
4313         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
4314                              osd_dto_credits_noquota[DTO_INDEX_INSERT]);
4315
4316         if (osd_dt_obj(dt)->oo_inode != NULL) {
4317                 struct inode *inode = osd_dt_obj(dt)->oo_inode;
4318
4319                 /* We ignore block quota on meta pool (MDTs), so needn't
4320                  * calculate how many blocks will be consumed by this index
4321                  * insert */
4322                 rc = osd_declare_inode_qid(env, i_uid_read(inode),
4323                                            i_gid_read(inode), 0,
4324                                            oh, true, true, NULL, false);
4325         }
4326
4327         if (fid == NULL)
4328                 RETURN(0);
4329
4330         rc = osd_remote_fid(env, osd, fid);
4331         if (rc <= 0)
4332                 RETURN(rc);
4333
4334         rc = 0;
4335
4336         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
4337                              osd_dto_credits_noquota[DTO_OBJECT_CREATE]);
4338         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
4339                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
4340         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
4341                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
4342
4343         RETURN(rc);
4344 }
4345
4346 /**
4347  * Index add function for interoperability mode (b11826).
4348  * It will add the directory entry.This entry is needed to
4349  * maintain name->fid mapping.
4350  *
4351  * \param key it is key i.e. file entry to be inserted
4352  * \param rec it is value of given key i.e. fid
4353  *
4354  * \retval   0, on success
4355  * \retval -ve, on error
4356  */
4357 static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
4358                                const struct dt_rec *rec,
4359                                const struct dt_key *key, struct thandle *th,
4360                                struct lustre_capa *capa, int ignore_quota)
4361 {
4362         struct osd_object       *obj = osd_dt_obj(dt);
4363         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
4364         struct dt_insert_rec    *rec1   = (struct dt_insert_rec *)rec;
4365         const struct lu_fid     *fid    = rec1->rec_fid;
4366         const char              *name = (const char *)key;
4367         struct osd_thread_info  *oti   = osd_oti_get(env);
4368         struct osd_inode_id     *id    = &oti->oti_id;
4369         struct inode            *child_inode = NULL;
4370         struct osd_object       *child = NULL;
4371         int                     rc;
4372         ENTRY;
4373
4374         LASSERT(osd_invariant(obj));
4375         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
4376         LASSERT(th != NULL);
4377
4378         osd_trans_exec_op(env, th, OSD_OT_INSERT);
4379
4380         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
4381                 RETURN(-EACCES);
4382
4383         LASSERTF(fid_is_sane(fid), "fid"DFID" is insane!\n", PFID(fid));
4384
4385         rc = osd_remote_fid(env, osd, fid);
4386         if (rc < 0) {
4387                 CERROR("%s: Can not find object "DFID" rc %d\n",
4388                        osd_name(osd), PFID(fid), rc);
4389                 RETURN(rc);
4390         }
4391
4392         if (rc == 1) {
4393                 /* Insert remote entry */
4394                 if (strcmp(name, dotdot) == 0 && strlen(name) == 2) {
4395                         struct osd_mdobj_map    *omm = osd->od_mdt_map;
4396                         struct osd_thandle      *oh;
4397
4398                         /* If parent on remote MDT, we need put this object
4399                          * under AGENT */
4400                         oh = container_of(th, typeof(*oh), ot_super);
4401                         rc = osd_add_to_remote_parent(env, osd, obj, oh);
4402                         if (rc != 0) {
4403                                 CERROR("%s: add "DFID" error: rc = %d\n",
4404                                        osd_name(osd),
4405                                        PFID(lu_object_fid(&dt->do_lu)), rc);
4406                                 RETURN(rc);
4407                         }
4408
4409                         child_inode = igrab(omm->omm_remote_parent->d_inode);
4410                 } else {
4411                         child_inode = osd_create_local_agent_inode(env, osd,
4412                                         obj, fid, rec1->rec_type & S_IFMT, th);
4413                         if (IS_ERR(child_inode))
4414                                 RETURN(PTR_ERR(child_inode));
4415                 }
4416         } else {
4417                 /* Insert local entry */
4418                 child = osd_object_find(env, dt, fid);
4419                 if (IS_ERR(child)) {
4420                         CERROR("%s: Can not find object "DFID"%u:%u: rc = %d\n",
4421                                osd_name(osd), PFID(fid),
4422                                id->oii_ino, id->oii_gen,
4423                                (int)PTR_ERR(child));
4424                         RETURN(PTR_ERR(child));
4425                 }
4426                 child_inode = igrab(child->oo_inode);
4427         }
4428
4429         rc = osd_ea_add_rec(env, obj, child_inode, name, fid, th);
4430
4431         CDEBUG(D_INODE, "parent %lu insert %s:%lu rc = %d\n",
4432                obj->oo_inode->i_ino, name, child_inode->i_ino, rc);
4433
4434         iput(child_inode);
4435         if (child != NULL)
4436                 osd_object_put(env, child);
4437         LASSERT(osd_invariant(obj));
4438         RETURN(rc);
4439 }
4440
4441 /**
4442  *  Initialize osd Iterator for given osd index object.
4443  *
4444  *  \param  dt      osd index object
4445  */
4446
4447 static struct dt_it *osd_it_iam_init(const struct lu_env *env,
4448                                      struct dt_object *dt,
4449                                      __u32 unused,
4450                                      struct lustre_capa *capa)
4451 {
4452         struct osd_it_iam      *it;
4453         struct osd_thread_info *oti = osd_oti_get(env);
4454         struct osd_object      *obj = osd_dt_obj(dt);
4455         struct lu_object       *lo  = &dt->do_lu;
4456         struct iam_path_descr  *ipd;
4457         struct iam_container   *bag = &obj->oo_dir->od_container;
4458
4459         LASSERT(lu_object_exists(lo));
4460
4461         if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_READ))
4462                 return ERR_PTR(-EACCES);
4463
4464         it = &oti->oti_it;
4465         ipd = osd_it_ipd_get(env, bag);
4466         if (likely(ipd != NULL)) {
4467                 it->oi_obj = obj;
4468                 it->oi_ipd = ipd;
4469                 lu_object_get(lo);
4470                 iam_it_init(&it->oi_it, bag, IAM_IT_MOVE, ipd);
4471                 return (struct dt_it *)it;
4472         }
4473         return ERR_PTR(-ENOMEM);
4474 }
4475
4476 /**
4477  * free given Iterator.
4478  */
4479
4480 static void osd_it_iam_fini(const struct lu_env *env, struct dt_it *di)
4481 {
4482         struct osd_it_iam *it = (struct osd_it_iam *)di;
4483         struct osd_object *obj = it->oi_obj;
4484
4485         iam_it_fini(&it->oi_it);
4486         osd_ipd_put(env, &obj->oo_dir->od_container, it->oi_ipd);
4487         lu_object_put(env, &obj->oo_dt.do_lu);
4488 }
4489
4490 /**
4491  *  Move Iterator to record specified by \a key
4492  *
4493  *  \param  di      osd iterator
4494  *  \param  key     key for index
4495  *
4496  *  \retval +ve  di points to record with least key not larger than key
4497  *  \retval  0   di points to exact matched key
4498  *  \retval -ve  failure
4499  */
4500
4501 static int osd_it_iam_get(const struct lu_env *env,
4502                           struct dt_it *di, const struct dt_key *key)
4503 {
4504         struct osd_thread_info  *oti = osd_oti_get(env);
4505         struct osd_it_iam       *it = (struct osd_it_iam *)di;
4506
4507         if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
4508                 /* swab quota uid/gid */
4509                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
4510                 key = (struct dt_key *)&oti->oti_quota_id;
4511         }
4512
4513         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
4514 }
4515
4516 /**
4517  *  Release Iterator
4518  *
4519  *  \param  di      osd iterator
4520  */
4521 static void osd_it_iam_put(const struct lu_env *env, struct dt_it *di)
4522 {
4523         struct osd_it_iam *it = (struct osd_it_iam *)di;
4524
4525         iam_it_put(&it->oi_it);
4526 }
4527
4528 /**
4529  *  Move iterator by one record
4530  *
4531  *  \param  di      osd iterator
4532  *
4533  *  \retval +1   end of container reached
4534  *  \retval  0   success
4535  *  \retval -ve  failure
4536  */
4537
4538 static int osd_it_iam_next(const struct lu_env *env, struct dt_it *di)
4539 {
4540         struct osd_it_iam *it = (struct osd_it_iam *)di;
4541
4542         return iam_it_next(&it->oi_it);
4543 }
4544
4545 /**
4546  * Return pointer to the key under iterator.
4547  */
4548
4549 static struct dt_key *osd_it_iam_key(const struct lu_env *env,
4550                                  const struct dt_it *di)
4551 {
4552         struct osd_thread_info *oti = osd_oti_get(env);
4553         struct osd_it_iam      *it = (struct osd_it_iam *)di;
4554         struct osd_object      *obj = it->oi_obj;
4555         struct dt_key          *key;
4556
4557         key = (struct dt_key *)iam_it_key_get(&it->oi_it);
4558
4559         if (!IS_ERR(key) && fid_is_quota(lu_object_fid(&obj->oo_dt.do_lu))) {
4560                 /* swab quota uid/gid */
4561                 oti->oti_quota_id = le64_to_cpu(*((__u64 *)key));
4562                 key = (struct dt_key *)&oti->oti_quota_id;
4563         }
4564
4565         return key;
4566 }
4567
4568 /**
4569  * Return size of key under iterator (in bytes)
4570  */
4571
4572 static int osd_it_iam_key_size(const struct lu_env *env, const struct dt_it *di)
4573 {
4574         struct osd_it_iam *it = (struct osd_it_iam *)di;
4575
4576         return iam_it_key_size(&it->oi_it);
4577 }
4578
4579 static inline void
4580 osd_it_append_attrs(struct lu_dirent *ent, int len, __u16 type)
4581 {
4582         /* check if file type is required */
4583         if (ent->lde_attrs & LUDA_TYPE) {
4584                 struct luda_type *lt;
4585                 int align = sizeof(*lt) - 1;
4586
4587                 len = (len + align) & ~align;
4588                 lt = (struct luda_type *)(ent->lde_name + len);
4589                 lt->lt_type = cpu_to_le16(DTTOIF(type));
4590         }
4591
4592         ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
4593 }
4594
4595 /**
4596  * build lu direct from backend fs dirent.
4597  */
4598
4599 static inline void
4600 osd_it_pack_dirent(struct lu_dirent *ent, struct lu_fid *fid, __u64 offset,
4601                    char *name, __u16 namelen, __u16 type, __u32 attr)
4602 {
4603         ent->lde_attrs = attr | LUDA_FID;
4604         fid_cpu_to_le(&ent->lde_fid, fid);
4605
4606         ent->lde_hash = cpu_to_le64(offset);
4607         ent->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
4608
4609         strncpy(ent->lde_name, name, namelen);
4610         ent->lde_name[namelen] = '\0';
4611         ent->lde_namelen = cpu_to_le16(namelen);
4612
4613         /* append lustre attributes */
4614         osd_it_append_attrs(ent, namelen, type);
4615 }
4616
4617 /**
4618  * Return pointer to the record under iterator.
4619  */
4620 static int osd_it_iam_rec(const struct lu_env *env,
4621                           const struct dt_it *di,
4622                           struct dt_rec *dtrec, __u32 attr)
4623 {
4624         struct osd_it_iam      *it   = (struct osd_it_iam *)di;
4625         struct osd_thread_info *info = osd_oti_get(env);
4626         ENTRY;
4627
4628         if (S_ISDIR(it->oi_obj->oo_inode->i_mode)) {
4629                 const struct osd_fid_pack *rec;
4630                 struct lu_fid             *fid = &info->oti_fid;
4631                 struct lu_dirent          *lde = (struct lu_dirent *)dtrec;
4632                 char                      *name;
4633                 int                        namelen;
4634                 __u64                      hash;
4635                 int                        rc;
4636
4637                 name = (char *)iam_it_key_get(&it->oi_it);
4638                 if (IS_ERR(name))
4639                         RETURN(PTR_ERR(name));
4640
4641                 namelen = iam_it_key_size(&it->oi_it);
4642
4643                 rec = (const struct osd_fid_pack *)iam_it_rec_get(&it->oi_it);
4644                 if (IS_ERR(rec))
4645                         RETURN(PTR_ERR(rec));
4646
4647                 rc = osd_fid_unpack(fid, rec);
4648                 if (rc)
4649                         RETURN(rc);
4650
4651                 hash = iam_it_store(&it->oi_it);
4652
4653                 /* IAM does not store object type in IAM index (dir) */
4654                 osd_it_pack_dirent(lde, fid, hash, name, namelen,
4655                                    0, LUDA_FID);
4656         } else if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
4657                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
4658                            (struct iam_rec *)dtrec);
4659                 osd_quota_unpack(it->oi_obj, dtrec);
4660         } else {
4661                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
4662                            (struct iam_rec *)dtrec);
4663         }
4664
4665         RETURN(0);
4666 }
4667
4668 /**
4669  * Returns cookie for current Iterator position.
4670  */
4671 static __u64 osd_it_iam_store(const struct lu_env *env, const struct dt_it *di)
4672 {
4673         struct osd_it_iam *it = (struct osd_it_iam *)di;
4674
4675         return iam_it_store(&it->oi_it);
4676 }
4677
4678 /**
4679  * Restore iterator from cookie.
4680  *
4681  * \param  di      osd iterator
4682  * \param  hash    Iterator location cookie
4683  *
4684  * \retval +ve  di points to record with least key not larger than key.
4685  * \retval  0   di points to exact matched key
4686  * \retval -ve  failure
4687  */
4688
4689 static int osd_it_iam_load(const struct lu_env *env,
4690                            const struct dt_it *di, __u64 hash)
4691 {
4692         struct osd_it_iam *it = (struct osd_it_iam *)di;
4693
4694         return iam_it_load(&it->oi_it, hash);
4695 }
4696
4697 static const struct dt_index_operations osd_index_iam_ops = {
4698         .dio_lookup         = osd_index_iam_lookup,
4699         .dio_declare_insert = osd_index_declare_iam_insert,
4700         .dio_insert         = osd_index_iam_insert,
4701         .dio_declare_delete = osd_index_declare_iam_delete,
4702         .dio_delete         = osd_index_iam_delete,
4703         .dio_it     = {
4704                 .init     = osd_it_iam_init,
4705                 .fini     = osd_it_iam_fini,
4706                 .get      = osd_it_iam_get,
4707                 .put      = osd_it_iam_put,
4708                 .next     = osd_it_iam_next,
4709                 .key      = osd_it_iam_key,
4710                 .key_size = osd_it_iam_key_size,
4711                 .rec      = osd_it_iam_rec,
4712                 .store    = osd_it_iam_store,
4713                 .load     = osd_it_iam_load
4714         }
4715 };
4716
4717
4718 /**
4719  * Creates or initializes iterator context.
4720  *
4721  * \retval struct osd_it_ea, iterator structure on success
4722  *
4723  */
4724 static struct dt_it *osd_it_ea_init(const struct lu_env *env,
4725                                     struct dt_object *dt,
4726                                     __u32 attr,
4727                                     struct lustre_capa *capa)
4728 {
4729         struct osd_object       *obj  = osd_dt_obj(dt);
4730         struct osd_thread_info  *info = osd_oti_get(env);
4731         struct osd_it_ea        *it   = &info->oti_it_ea;
4732         struct file             *file = &it->oie_file;
4733         struct lu_object        *lo   = &dt->do_lu;
4734         struct dentry           *obj_dentry = &info->oti_it_dentry;
4735         ENTRY;
4736         LASSERT(lu_object_exists(lo));
4737
4738         obj_dentry->d_inode = obj->oo_inode;
4739         obj_dentry->d_sb = osd_sb(osd_obj2dev(obj));
4740         obj_dentry->d_name.hash = 0;
4741
4742         it->oie_rd_dirent       = 0;
4743         it->oie_it_dirent       = 0;
4744         it->oie_dirent          = NULL;
4745         it->oie_buf             = info->oti_it_ea_buf;
4746         it->oie_obj             = obj;
4747
4748         /* Reset the "file" totally to avoid to reuse any old value from
4749          * former readdir handling, the "file->f_pos" should be zero. */
4750         memset(file, 0, sizeof(*file));
4751         /* Only FMODE_64BITHASH or FMODE_32BITHASH should be set, NOT both. */
4752         if (attr & LUDA_64BITHASH)
4753                 file->f_mode    = FMODE_64BITHASH;
4754         else
4755                 file->f_mode    = FMODE_32BITHASH;
4756         file->f_dentry          = obj_dentry;
4757         file->f_mapping         = obj->oo_inode->i_mapping;
4758         file->f_op              = obj->oo_inode->i_fop;
4759         set_file_inode(file, obj->oo_inode);
4760
4761         lu_object_get(lo);
4762         RETURN((struct dt_it *) it);
4763 }
4764
4765 /**
4766  * Destroy or finishes iterator context.
4767  *
4768  * \param di iterator structure to be destroyed
4769  */
4770 static void osd_it_ea_fini(const struct lu_env *env, struct dt_it *di)
4771 {
4772         struct osd_it_ea     *it   = (struct osd_it_ea *)di;
4773         struct osd_object    *obj  = it->oie_obj;
4774         struct inode       *inode  = obj->oo_inode;
4775
4776         ENTRY;
4777         it->oie_file.f_op->release(inode, &it->oie_file);
4778         lu_object_put(env, &obj->oo_dt.do_lu);
4779         EXIT;
4780 }
4781
4782 /**
4783  * It position the iterator at given key, so that next lookup continues from
4784  * that key Or it is similar to dio_it->load() but based on a key,
4785  * rather than file position.
4786  *
4787  * As a special convention, osd_it_ea_get(env, di, "") has to rewind iterator
4788  * to the beginning.
4789  *
4790  * TODO: Presently return +1 considering it is only used by mdd_dir_is_empty().
4791  */
4792 static int osd_it_ea_get(const struct lu_env *env,
4793                          struct dt_it *di, const struct dt_key *key)
4794 {
4795         struct osd_it_ea     *it   = (struct osd_it_ea *)di;
4796
4797         ENTRY;
4798         LASSERT(((const char *)key)[0] == '\0');
4799         it->oie_file.f_pos      = 0;
4800         it->oie_rd_dirent       = 0;
4801         it->oie_it_dirent       = 0;
4802         it->oie_dirent          = NULL;
4803
4804         RETURN(+1);
4805 }
4806
4807 /**
4808  * Does nothing
4809  */
4810 static void osd_it_ea_put(const struct lu_env *env, struct dt_it *di)
4811 {
4812 }
4813
4814 struct osd_filldir_cbs {
4815 #ifdef HAVE_DIR_CONTEXT
4816         struct dir_context ctx;
4817 #endif
4818         struct osd_it_ea  *it;
4819 };
4820 /**
4821  * It is called internally by ->readdir(). It fills the
4822  * iterator's in-memory data structure with required
4823  * information i.e. name, namelen, rec_size etc.
4824  *
4825  * \param buf in which information to be filled in.
4826  * \param name name of the file in given dir
4827  *
4828  * \retval 0 on success
4829  * \retval 1 on buffer full
4830  */
4831 static int osd_ldiskfs_filldir(void *buf, const char *name, int namelen,
4832                                loff_t offset, __u64 ino,
4833                                unsigned d_type)
4834 {
4835         struct osd_it_ea        *it   = ((struct osd_filldir_cbs *)buf)->it;
4836         struct osd_object       *obj  = it->oie_obj;
4837         struct osd_it_ea_dirent *ent  = it->oie_dirent;
4838         struct lu_fid           *fid  = &ent->oied_fid;
4839         struct osd_fid_pack     *rec;
4840         ENTRY;
4841
4842         /* this should never happen */
4843         if (unlikely(namelen == 0 || namelen > LDISKFS_NAME_LEN)) {
4844                 CERROR("ldiskfs return invalid namelen %d\n", namelen);
4845                 RETURN(-EIO);
4846         }
4847
4848         if ((void *) ent - it->oie_buf + sizeof(*ent) + namelen >
4849             OSD_IT_EA_BUFSIZE)
4850                 RETURN(1);
4851
4852         /* "." is just the object itself. */
4853         if (namelen == 1 && name[0] == '.') {
4854                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
4855         } else if (d_type & LDISKFS_DIRENT_LUFID) {
4856                 rec = (struct osd_fid_pack*) (name + namelen + 1);
4857                 if (osd_fid_unpack(fid, rec) != 0)
4858                         fid_zero(fid);
4859         } else {
4860                 fid_zero(fid);
4861         }
4862         d_type &= ~LDISKFS_DIRENT_LUFID;
4863
4864         /* NOT export local root. */
4865         if (unlikely(osd_sb(osd_obj2dev(obj))->s_root->d_inode->i_ino == ino)) {
4866                 ino = obj->oo_inode->i_ino;
4867                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
4868         }
4869
4870         ent->oied_ino     = ino;
4871         ent->oied_off     = offset;
4872         ent->oied_namelen = namelen;
4873         ent->oied_type    = d_type;
4874
4875         memcpy(ent->oied_name, name, namelen);
4876
4877         it->oie_rd_dirent++;
4878         it->oie_dirent = (void *) ent + cfs_size_round(sizeof(*ent) + namelen);
4879         RETURN(0);
4880 }
4881
4882 /**
4883  * Calls ->readdir() to load a directory entry at a time
4884  * and stored it in iterator's in-memory data structure.
4885  *
4886  * \param di iterator's in memory structure
4887  *
4888  * \retval   0 on success
4889  * \retval -ve on error
4890  * \retval +1 reach the end of entry
4891  */
4892 static int osd_ldiskfs_it_fill(const struct lu_env *env,
4893                                const struct dt_it *di)
4894 {
4895         struct osd_it_ea   *it    = (struct osd_it_ea *)di;
4896         struct osd_object  *obj   = it->oie_obj;
4897         struct inode       *inode = obj->oo_inode;
4898         struct htree_lock  *hlock = NULL;
4899         struct file        *filp  = &it->oie_file;
4900         int                 rc = 0;
4901         struct osd_filldir_cbs buf = {
4902 #ifdef HAVE_DIR_CONTEXT
4903                 .ctx.actor = osd_ldiskfs_filldir,
4904 #endif
4905                 .it = it
4906         };
4907
4908         ENTRY;
4909         it->oie_dirent = it->oie_buf;
4910         it->oie_rd_dirent = 0;
4911
4912         if (obj->oo_hl_head != NULL) {
4913                 hlock = osd_oti_get(env)->oti_hlock;
4914                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
4915                                    inode, LDISKFS_HLOCK_READDIR);
4916         } else {
4917                 down_read(&obj->oo_ext_idx_sem);
4918         }
4919
4920 #ifdef HAVE_DIR_CONTEXT
4921         buf.ctx.pos = filp->f_pos;
4922         rc = inode->i_fop->iterate(filp, &buf.ctx);
4923         filp->f_pos = buf.ctx.pos;
4924 #else
4925         rc = inode->i_fop->readdir(filp, &buf, osd_ldiskfs_filldir);
4926 #endif
4927
4928         if (hlock != NULL)
4929                 ldiskfs_htree_unlock(hlock);
4930         else
4931                 up_read(&obj->oo_ext_idx_sem);
4932
4933         if (it->oie_rd_dirent == 0) {
4934                 /*If it does not get any dirent, it means it has been reached
4935                  *to the end of the dir */
4936                 it->oie_file.f_pos = ldiskfs_get_htree_eof(&it->oie_file);
4937                 if (rc == 0)
4938                         rc = 1;
4939         } else {
4940                 it->oie_dirent = it->oie_buf;
4941                 it->oie_it_dirent = 1;
4942         }
4943
4944         RETURN(rc);
4945 }
4946
4947 /**
4948  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
4949  * to load a directory entry at a time and stored it in
4950  * iterator's in-memory data structure.
4951  *
4952  * \param di iterator's in memory structure
4953  *
4954  * \retval +ve iterator reached to end
4955  * \retval   0 iterator not reached to end
4956  * \retval -ve on error
4957  */
4958 static int osd_it_ea_next(const struct lu_env *env, struct dt_it *di)
4959 {
4960         struct osd_it_ea *it = (struct osd_it_ea *)di;
4961         int rc;
4962
4963         ENTRY;
4964
4965         if (it->oie_it_dirent < it->oie_rd_dirent) {
4966                 it->oie_dirent =
4967                         (void *) it->oie_dirent +
4968                         cfs_size_round(sizeof(struct osd_it_ea_dirent) +
4969                                        it->oie_dirent->oied_namelen);
4970                 it->oie_it_dirent++;
4971                 RETURN(0);
4972         } else {
4973                 if (it->oie_file.f_pos == ldiskfs_get_htree_eof(&it->oie_file))
4974                         rc = +1;
4975                 else
4976                         rc = osd_ldiskfs_it_fill(env, di);
4977         }
4978
4979         RETURN(rc);
4980 }
4981
4982 /**
4983  * Returns the key at current position from iterator's in memory structure.
4984  *
4985  * \param di iterator's in memory structure
4986  *
4987  * \retval key i.e. struct dt_key on success
4988  */
4989 static struct dt_key *osd_it_ea_key(const struct lu_env *env,
4990                                     const struct dt_it *di)
4991 {
4992         struct osd_it_ea *it = (struct osd_it_ea *)di;
4993
4994         return (struct dt_key *)it->oie_dirent->oied_name;
4995 }
4996
4997 /**
4998  * Returns the key's size at current position from iterator's in memory structure.
4999  *
5000  * \param di iterator's in memory structure
5001  *
5002  * \retval key_size i.e. struct dt_key on success
5003  */
5004 static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
5005 {
5006         struct osd_it_ea *it = (struct osd_it_ea *)di;
5007
5008         return it->oie_dirent->oied_namelen;
5009 }
5010
5011 static int
5012 osd_dirent_update(handle_t *jh, struct super_block *sb,
5013                   struct osd_it_ea_dirent *ent, struct lu_fid *fid,
5014                   struct buffer_head *bh, struct ldiskfs_dir_entry_2 *de)
5015 {
5016         struct osd_fid_pack *rec;
5017         int                  rc;
5018         ENTRY;
5019
5020         LASSERT(de->file_type & LDISKFS_DIRENT_LUFID);
5021         LASSERT(de->rec_len >= de->name_len + sizeof(struct osd_fid_pack));
5022
5023         rc = ldiskfs_journal_get_write_access(jh, bh);
5024         if (rc != 0)
5025                 RETURN(rc);
5026
5027         rec = (struct osd_fid_pack *)(de->name + de->name_len + 1);
5028         fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
5029         rc = ldiskfs_journal_dirty_metadata(jh, bh);
5030
5031         RETURN(rc);
5032 }
5033
5034 static inline int
5035 osd_dirent_has_space(__u16 reclen, __u16 namelen, unsigned blocksize)
5036 {
5037         if (ldiskfs_rec_len_from_disk(reclen, blocksize) >=
5038             __LDISKFS_DIR_REC_LEN(namelen + 1 + sizeof(struct osd_fid_pack)))
5039                 return 1;
5040         else
5041                 return 0;
5042 }
5043
5044 static inline int
5045 osd_dot_dotdot_has_space(struct ldiskfs_dir_entry_2 *de, int dot_dotdot)
5046 {
5047         LASSERTF(dot_dotdot == 1 || dot_dotdot == 2,
5048                  "dot_dotdot = %d\n", dot_dotdot);
5049
5050         if (LDISKFS_DIR_REC_LEN(de) >=
5051             __LDISKFS_DIR_REC_LEN(dot_dotdot + 1 + sizeof(struct osd_fid_pack)))
5052                 return 1;
5053         else
5054                 return 0;
5055 }
5056
5057 static int
5058 osd_dirent_reinsert(const struct lu_env *env, handle_t *jh,
5059                     struct inode *dir, struct inode *inode,
5060                     struct osd_it_ea_dirent *ent, struct lu_fid *fid,
5061                     struct buffer_head *bh, struct ldiskfs_dir_entry_2 *de,
5062                     struct htree_lock *hlock)
5063 {
5064         struct dentry               *dentry;
5065         struct osd_fid_pack         *rec;
5066         struct ldiskfs_dentry_param *ldp;
5067         int                          rc;
5068         ENTRY;
5069
5070         if (!LDISKFS_HAS_INCOMPAT_FEATURE(inode->i_sb,
5071                                           LDISKFS_FEATURE_INCOMPAT_DIRDATA))
5072                 RETURN(0);
5073
5074         /* There is enough space to hold the FID-in-dirent. */
5075         if (osd_dirent_has_space(de->rec_len, ent->oied_namelen,
5076                                  dir->i_sb->s_blocksize)) {
5077                 rc = ldiskfs_journal_get_write_access(jh, bh);
5078                 if (rc != 0)
5079                         RETURN(rc);
5080
5081                 de->name[de->name_len] = 0;
5082                 rec = (struct osd_fid_pack *)(de->name + de->name_len + 1);
5083                 rec->fp_len = sizeof(struct lu_fid) + 1;
5084                 fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
5085                 de->file_type |= LDISKFS_DIRENT_LUFID;
5086
5087                 rc = ldiskfs_journal_dirty_metadata(jh, bh);
5088
5089                 RETURN(rc);
5090         }
5091
5092         rc = ldiskfs_delete_entry(jh, dir, de, bh);
5093         if (rc != 0)
5094                 RETURN(rc);
5095
5096         dentry = osd_child_dentry_by_inode(env, dir, ent->oied_name,
5097                                            ent->oied_namelen);
5098         ldp = (struct ldiskfs_dentry_param *)osd_oti_get(env)->oti_ldp;
5099         osd_get_ldiskfs_dirent_param(ldp, fid);
5100         dentry->d_fsdata = (void *)ldp;
5101         ll_vfs_dq_init(dir);
5102         rc = osd_ldiskfs_add_entry(jh, dentry, inode, hlock);
5103         /* It is too bad, we cannot reinsert the name entry back.
5104          * That means we lose it! */
5105         if (rc != 0)
5106                 CDEBUG(D_LFSCK, "%.16s: fail to reinsert the dirent, "
5107                        "dir = %lu/%u, name = %.*s, "DFID": rc = %d\n",
5108                        LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
5109                        dir->i_ino, dir->i_generation,
5110                        ent->oied_namelen, ent->oied_name, PFID(fid), rc);
5111
5112         RETURN(rc);
5113 }
5114
5115 static int
5116 osd_dirent_check_repair(const struct lu_env *env, struct osd_object *obj,
5117                         struct osd_it_ea *it, struct lu_fid *fid,
5118                         struct osd_inode_id *id, __u32 *attr)
5119 {
5120         struct osd_thread_info     *info        = osd_oti_get(env);
5121         struct lustre_mdt_attrs    *lma         = &info->oti_mdt_attrs;
5122         struct osd_device          *dev         = osd_obj2dev(obj);
5123         struct super_block         *sb          = osd_sb(dev);
5124         const char                 *devname     =
5125                                         LDISKFS_SB(sb)->s_es->s_volume_name;
5126         struct osd_it_ea_dirent    *ent         = it->oie_dirent;
5127         struct inode               *dir         = obj->oo_inode;
5128         struct htree_lock          *hlock       = NULL;
5129         struct buffer_head         *bh          = NULL;
5130         handle_t                   *jh          = NULL;
5131         struct ldiskfs_dir_entry_2 *de;
5132         struct dentry              *dentry;
5133         struct inode               *inode;
5134         int                         credits;
5135         int                         rc;
5136         int                         dot_dotdot  = 0;
5137         bool                        dirty       = false;
5138         ENTRY;
5139
5140         if (ent->oied_name[0] == '.') {
5141                 if (ent->oied_namelen == 1)
5142                         dot_dotdot = 1;
5143                 else if (ent->oied_namelen == 2 && ent->oied_name[1] == '.')
5144                         dot_dotdot = 2;
5145         }
5146
5147         dentry = osd_child_dentry_get(env, obj, ent->oied_name,
5148                                       ent->oied_namelen);
5149
5150         /* We need to ensure that the name entry is still valid.
5151          * Because it may be removed or renamed by other already.
5152          *
5153          * The unlink or rename operation will start journal before PDO lock,
5154          * so to avoid deadlock, here we need to start journal handle before
5155          * related PDO lock also. But because we do not know whether there
5156          * will be something to be repaired before PDO lock, we just start
5157          * journal without conditions.
5158          *
5159          * We may need to remove the name entry firstly, then insert back.
5160          * One credit is for user quota file update.
5161          * One credit is for group quota file update.
5162          * Two credits are for dirty inode. */
5163         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE] +
5164                   osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1 + 1 + 2;
5165
5166 again:
5167         if (dev->od_dirent_journal) {
5168                 jh = osd_journal_start_sb(sb, LDISKFS_HT_MISC, credits);
5169                 if (IS_ERR(jh)) {
5170                         rc = PTR_ERR(jh);
5171                         CDEBUG(D_LFSCK, "%.16s: fail to start trans for dirent "
5172                                "check_repair, dir = %lu/%u, credits = %d, "
5173                                "name = %.*s: rc = %d\n",
5174                                devname, dir->i_ino, dir->i_generation, credits,
5175                                ent->oied_namelen, ent->oied_name, rc);
5176                         RETURN(rc);
5177                 }
5178
5179                 if (obj->oo_hl_head != NULL) {
5180                         hlock = osd_oti_get(env)->oti_hlock;
5181                         /* "0" means exclusive lock for the whole directory.
5182                          * We need to prevent others access such name entry
5183                          * during the delete + insert. Neither HLOCK_ADD nor
5184                          * HLOCK_DEL cannot guarantee the atomicity. */
5185                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir, 0);
5186                 } else {
5187                         down_write(&obj->oo_ext_idx_sem);
5188                 }
5189         } else {
5190                 if (obj->oo_hl_head != NULL) {
5191                         hlock = osd_oti_get(env)->oti_hlock;
5192                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir,
5193                                            LDISKFS_HLOCK_LOOKUP);
5194                 } else {
5195                         down_read(&obj->oo_ext_idx_sem);
5196                 }
5197         }
5198
5199         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
5200         /* For dot/dotdot entry, if there is not enough space to hold the
5201          * FID-in-dirent, just keep them there. It only happens when the
5202          * device upgraded from 1.8 or restored from MDT file-level backup.
5203          * For the whole directory, only dot/dotdot entry have no FID-in-dirent
5204          * and needs to get FID from LMA when readdir, it will not affect the
5205          * performance much. */
5206         if ((bh == NULL) || (le32_to_cpu(de->inode) != ent->oied_ino) ||
5207             (dot_dotdot != 0 && !osd_dot_dotdot_has_space(de, dot_dotdot))) {
5208                 *attr |= LUDA_IGNORE;
5209                 GOTO(out_journal, rc = 0);
5210         }
5211
5212         osd_id_gen(id, ent->oied_ino, OSD_OII_NOGEN);
5213         inode = osd_iget(info, dev, id);
5214         if (IS_ERR(inode)) {
5215                 rc = PTR_ERR(inode);
5216                 if (rc == -ENOENT || rc == -ESTALE) {
5217                         *attr |= LUDA_IGNORE;
5218                         rc = 0;
5219                 } else {
5220                         CDEBUG(D_LFSCK, "%.16s: fail to iget for dirent "
5221                                "check_repair, dir = %lu/%u, name = %.*s: "
5222                                "rc = %d\n",
5223                                devname, dir->i_ino, dir->i_generation,
5224                                ent->oied_namelen, ent->oied_name, rc);
5225                 }
5226
5227                 GOTO(out_journal, rc);
5228         }
5229
5230         /* skip the REMOTE_PARENT_DIR. */
5231         if (inode == dev->od_mdt_map->omm_remote_parent->d_inode)
5232                 GOTO(out_inode, rc = 0);
5233
5234         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
5235         if (rc == 0) {
5236                 LASSERT(!(lma->lma_compat & LMAC_NOT_IN_OI));
5237
5238                 if (fid_is_sane(fid)) {
5239                         /* FID-in-dirent is valid. */
5240                         if (lu_fid_eq(fid, &lma->lma_self_fid))
5241                                 GOTO(out_inode, rc = 0);
5242
5243                         /* Do not repair under dryrun mode. */
5244                         if (*attr & LUDA_VERIFY_DRYRUN) {
5245                                 *attr |= LUDA_REPAIR;
5246                                 GOTO(out_inode, rc = 0);
5247                         }
5248
5249                         if (!dev->od_dirent_journal) {
5250                                 iput(inode);
5251                                 brelse(bh);
5252                                 if (hlock != NULL)
5253                                         ldiskfs_htree_unlock(hlock);
5254                                 else
5255                                         up_read(&obj->oo_ext_idx_sem);
5256                                 dev->od_dirent_journal = 1;
5257                                 goto again;
5258                         }
5259
5260                         *fid = lma->lma_self_fid;
5261                         dirty = true;
5262                         /* Update the FID-in-dirent. */
5263                         rc = osd_dirent_update(jh, sb, ent, fid, bh, de);
5264                         if (rc == 0)
5265                                 *attr |= LUDA_REPAIR;
5266                         else
5267                                 CDEBUG(D_LFSCK, "%.16s: fail to update FID "
5268                                        "in the dirent, dir = %lu/%u, "
5269                                        "name = %.*s, "DFID": rc = %d\n",
5270                                        devname, dir->i_ino, dir->i_generation,
5271                                        ent->oied_namelen, ent->oied_name,
5272                                        PFID(fid), rc);
5273                 } else {
5274                         /* Do not repair under dryrun mode. */
5275                         if (*attr & LUDA_VERIFY_DRYRUN) {
5276                                 *fid = lma->lma_self_fid;
5277                                 *attr |= LUDA_REPAIR;
5278                                 GOTO(out_inode, rc = 0);
5279                         }
5280
5281                         if (!dev->od_dirent_journal) {
5282                                 iput(inode);
5283                                 brelse(bh);
5284                                 if (hlock != NULL)
5285                                         ldiskfs_htree_unlock(hlock);
5286                                 else
5287                                         up_read(&obj->oo_ext_idx_sem);
5288                                 dev->od_dirent_journal = 1;
5289                                 goto again;
5290                         }
5291
5292                         *fid = lma->lma_self_fid;
5293                         dirty = true;
5294                         /* Append the FID-in-dirent. */
5295                         rc = osd_dirent_reinsert(env, jh, dir, inode, ent,
5296                                                  fid, bh, de, hlock);
5297                         if (rc == 0)
5298                                 *attr |= LUDA_REPAIR;
5299                         else
5300                                 CDEBUG(D_LFSCK, "%.16s: fail to append FID "
5301                                        "after the dirent, dir = %lu/%u, "
5302                                        "name = %.*s, "DFID": rc = %d\n",
5303                                        devname, dir->i_ino, dir->i_generation,
5304                                        ent->oied_namelen, ent->oied_name,
5305                                        PFID(fid), rc);
5306                 }
5307         } else if (rc == -ENODATA) {
5308                 /* Do not repair under dryrun mode. */
5309                 if (*attr & LUDA_VERIFY_DRYRUN) {
5310                         if (fid_is_sane(fid)) {
5311                                 *attr |= LUDA_REPAIR;
5312                         } else {
5313                                 lu_igif_build(fid, inode->i_ino,
5314                                               inode->i_generation);
5315                                 *attr |= LUDA_UPGRADE;
5316                         }
5317                         GOTO(out_inode, rc = 0);
5318                 }
5319
5320                 if (!dev->od_dirent_journal) {
5321                         iput(inode);
5322                         brelse(bh);
5323                         if (hlock != NULL)
5324                                 ldiskfs_htree_unlock(hlock);
5325                         else
5326                                 up_read(&obj->oo_ext_idx_sem);
5327                         dev->od_dirent_journal = 1;
5328                         goto again;
5329                 }
5330
5331                 dirty = true;
5332                 if (unlikely(fid_is_sane(fid))) {
5333                         /* FID-in-dirent exists, but FID-in-LMA is lost.
5334                          * Trust the FID-in-dirent, and add FID-in-LMA. */
5335                         rc = osd_ea_fid_set(info, inode, fid, 0, 0);
5336                         if (rc == 0)
5337                                 *attr |= LUDA_REPAIR;
5338                         else
5339                                 CDEBUG(D_LFSCK, "%.16s: fail to set LMA for "
5340                                        "update dirent, dir = %lu/%u, "
5341                                        "name = %.*s, "DFID": rc = %d\n",
5342                                        devname, dir->i_ino, dir->i_generation,
5343                                        ent->oied_namelen, ent->oied_name,
5344                                        PFID(fid), rc);
5345                 } else {
5346                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
5347                         /* It is probably IGIF object. Only aappend the
5348                          * FID-in-dirent. OI scrub will process FID-in-LMA. */
5349                         rc = osd_dirent_reinsert(env, jh, dir, inode, ent,
5350                                                  fid, bh, de, hlock);
5351                         if (rc == 0)
5352                                 *attr |= LUDA_UPGRADE;
5353                         else
5354                                 CDEBUG(D_LFSCK, "%.16s: fail to append IGIF "
5355                                        "after the dirent, dir = %lu/%u, "
5356                                        "name = %.*s, "DFID": rc = %d\n",
5357                                        devname, dir->i_ino, dir->i_generation,
5358                                        ent->oied_namelen, ent->oied_name,
5359                                        PFID(fid), rc);
5360                 }
5361         }
5362
5363         GOTO(out_inode, rc);
5364
5365 out_inode:
5366         iput(inode);
5367
5368 out_journal:
5369         brelse(bh);
5370         if (hlock != NULL) {
5371                 ldiskfs_htree_unlock(hlock);
5372         } else {
5373                 if (dev->od_dirent_journal)
5374                         up_write(&obj->oo_ext_idx_sem);
5375                 else
5376                         up_read(&obj->oo_ext_idx_sem);
5377         }
5378         if (jh != NULL)
5379                 ldiskfs_journal_stop(jh);
5380         if (rc >= 0 && !dirty)
5381                 dev->od_dirent_journal = 0;
5382         return rc;
5383 }
5384
5385 /**
5386  * Returns the value at current position from iterator's in memory structure.
5387  *
5388  * \param di struct osd_it_ea, iterator's in memory structure
5389  * \param attr attr requested for dirent.
5390  * \param lde lustre dirent
5391  *
5392  * \retval   0 no error and \param lde has correct lustre dirent.
5393  * \retval -ve on error
5394  */
5395 static inline int osd_it_ea_rec(const struct lu_env *env,
5396                                 const struct dt_it *di,
5397                                 struct dt_rec *dtrec, __u32 attr)
5398 {
5399         struct osd_it_ea       *it    = (struct osd_it_ea *)di;
5400         struct osd_object      *obj   = it->oie_obj;
5401         struct osd_device      *dev   = osd_obj2dev(obj);
5402         struct osd_scrub       *scrub = &dev->od_scrub;
5403         struct scrub_file      *sf    = &scrub->os_file;
5404         struct osd_thread_info *oti   = osd_oti_get(env);
5405         struct osd_inode_id    *id    = &oti->oti_id;
5406         struct osd_idmap_cache *oic   = &oti->oti_cache;
5407         struct lu_fid          *fid   = &it->oie_dirent->oied_fid;
5408         struct lu_dirent       *lde   = (struct lu_dirent *)dtrec;
5409         __u32                   ino   = it->oie_dirent->oied_ino;
5410         int                     rc    = 0;
5411         ENTRY;
5412
5413         if (attr & LUDA_VERIFY) {
5414                 attr |= LUDA_TYPE;
5415                 if (unlikely(ino == osd_sb(dev)->s_root->d_inode->i_ino)) {
5416                         attr |= LUDA_IGNORE;
5417                         rc = 0;
5418                 } else {
5419                         rc = osd_dirent_check_repair(env, obj, it, fid, id,
5420                                                      &attr);
5421                 }
5422         } else {
5423                 attr &= ~LU_DIRENT_ATTRS_MASK;
5424                 if (!fid_is_sane(fid)) {
5425                         if (OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP) &&
5426                             likely(it->oie_dirent->oied_namelen != 2 ||
5427                                    it->oie_dirent->oied_name[0] != '.' ||
5428                                    it->oie_dirent->oied_name[1] != '.'))
5429                                 RETURN(-ENOENT);
5430
5431                         rc = osd_ea_fid_get(env, obj, ino, fid, id);
5432                 } else {
5433                         osd_id_gen(id, ino, OSD_OII_NOGEN);
5434                 }
5435         }
5436
5437         /* Pack the entry anyway, at least the offset is right. */
5438         osd_it_pack_dirent(lde, fid, it->oie_dirent->oied_off,
5439                            it->oie_dirent->oied_name,
5440                            it->oie_dirent->oied_namelen,
5441                            it->oie_dirent->oied_type, attr);
5442
5443         if (rc < 0)
5444                 RETURN(rc);
5445
5446         if (osd_remote_fid(env, dev, fid))
5447                 RETURN(0);
5448
5449         if (likely(!(attr & LUDA_IGNORE)))
5450                 rc = osd_add_oi_cache(oti, dev, id, fid);
5451
5452         if (!(attr & LUDA_VERIFY) &&
5453             (scrub->os_pos_current <= ino) &&
5454             ((sf->sf_flags & SF_INCONSISTENT) ||
5455              (sf->sf_flags & SF_UPGRADE && fid_is_igif(fid)) ||
5456              ldiskfs_test_bit(osd_oi_fid2idx(dev, fid), sf->sf_oi_bitmap)))
5457                 osd_consistency_check(oti, dev, oic);
5458
5459         RETURN(rc);
5460 }
5461
5462 /**
5463  * Returns the record size size at current position.
5464  *
5465  * This function will return record(lu_dirent) size in bytes.
5466  *
5467  * \param[in] env       execution environment
5468  * \param[in] di        iterator's in memory structure
5469  * \param[in] attr      attribute of the entry, only requires LUDA_TYPE to
5470  *                      calculate the lu_dirent size.
5471  *
5472  * \retval      record size(in bytes & in memory) of the current lu_dirent
5473  *              entry.
5474  */
5475 static int osd_it_ea_rec_size(const struct lu_env *env, const struct dt_it *di,
5476                               __u32 attr)
5477 {
5478         struct osd_it_ea *it = (struct osd_it_ea *)di;
5479
5480         return lu_dirent_calc_size(it->oie_dirent->oied_namelen, attr);
5481 }
5482
5483 /**
5484  * Returns a cookie for current position of the iterator head, so that
5485  * user can use this cookie to load/start the iterator next time.
5486  *
5487  * \param di iterator's in memory structure
5488  *
5489  * \retval cookie for current position, on success
5490  */
5491 static __u64 osd_it_ea_store(const struct lu_env *env, const struct dt_it *di)
5492 {
5493         struct osd_it_ea *it = (struct osd_it_ea *)di;
5494
5495         return it->oie_dirent->oied_off;
5496 }
5497
5498 /**
5499  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
5500  * to load a directory entry at a time and stored it i inn,
5501  * in iterator's in-memory data structure.
5502  *
5503  * \param di struct osd_it_ea, iterator's in memory structure
5504  *
5505  * \retval +ve on success
5506  * \retval -ve on error
5507  */
5508 static int osd_it_ea_load(const struct lu_env *env,
5509                           const struct dt_it *di, __u64 hash)
5510 {
5511         struct osd_it_ea *it = (struct osd_it_ea *)di;
5512         int rc;
5513
5514         ENTRY;
5515         it->oie_file.f_pos = hash;
5516
5517         rc =  osd_ldiskfs_it_fill(env, di);
5518         if (rc > 0)
5519                 rc = -ENODATA;
5520
5521         if (rc == 0)
5522                 rc = +1;
5523
5524         RETURN(rc);
5525 }
5526
5527 /**
5528  * Index lookup function for interoperability mode (b11826).
5529  *
5530  * \param key,  key i.e. file name to be searched
5531  *
5532  * \retval +ve, on success
5533  * \retval -ve, on error
5534  */
5535 static int osd_index_ea_lookup(const struct lu_env *env, struct dt_object *dt,
5536                                struct dt_rec *rec, const struct dt_key *key,
5537                                struct lustre_capa *capa)
5538 {
5539         struct osd_object *obj = osd_dt_obj(dt);
5540         int rc = 0;
5541
5542         ENTRY;
5543
5544         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
5545         LINVRNT(osd_invariant(obj));
5546
5547         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_LOOKUP))
5548                 return -EACCES;
5549
5550         rc = osd_ea_lookup_rec(env, obj, rec, key);
5551         if (rc == 0)
5552                 rc = +1;
5553         RETURN(rc);
5554 }
5555
5556 /**
5557  * Index and Iterator operations for interoperability
5558  * mode (i.e. to run 2.0 mds on 1.8 disk) (b11826)
5559  */
5560 static const struct dt_index_operations osd_index_ea_ops = {
5561         .dio_lookup         = osd_index_ea_lookup,
5562         .dio_declare_insert = osd_index_declare_ea_insert,
5563         .dio_insert         = osd_index_ea_insert,
5564         .dio_declare_delete = osd_index_declare_ea_delete,
5565         .dio_delete         = osd_index_ea_delete,
5566         .dio_it     = {
5567                 .init     = osd_it_ea_init,
5568                 .fini     = osd_it_ea_fini,
5569                 .get      = osd_it_ea_get,
5570                 .put      = osd_it_ea_put,
5571                 .next     = osd_it_ea_next,
5572                 .key      = osd_it_ea_key,
5573                 .key_size = osd_it_ea_key_size,
5574                 .rec      = osd_it_ea_rec,
5575                 .rec_size = osd_it_ea_rec_size,
5576                 .store    = osd_it_ea_store,
5577                 .load     = osd_it_ea_load
5578         }
5579 };
5580
5581 static void *osd_key_init(const struct lu_context *ctx,
5582                           struct lu_context_key *key)
5583 {
5584         struct osd_thread_info *info;
5585
5586         OBD_ALLOC_PTR(info);
5587         if (info == NULL)
5588                 return ERR_PTR(-ENOMEM);
5589
5590         OBD_ALLOC(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
5591         if (info->oti_it_ea_buf == NULL)
5592                 goto out_free_info;
5593
5594         info->oti_env = container_of(ctx, struct lu_env, le_ctx);
5595
5596         info->oti_hlock = ldiskfs_htree_lock_alloc();
5597         if (info->oti_hlock == NULL)
5598                 goto out_free_ea;
5599
5600         return info;
5601
5602  out_free_ea:
5603         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
5604  out_free_info:
5605         OBD_FREE_PTR(info);
5606         return ERR_PTR(-ENOMEM);
5607 }
5608
5609 static void osd_key_fini(const struct lu_context *ctx,
5610                          struct lu_context_key *key, void* data)
5611 {
5612         struct osd_thread_info *info = data;
5613
5614         if (info->oti_hlock != NULL)
5615                 ldiskfs_htree_lock_free(info->oti_hlock);
5616         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
5617         lu_buf_free(&info->oti_iobuf.dr_pg_buf);
5618         lu_buf_free(&info->oti_iobuf.dr_bl_buf);
5619         OBD_FREE_PTR(info);
5620 }
5621
5622 static void osd_key_exit(const struct lu_context *ctx,
5623                          struct lu_context_key *key, void *data)
5624 {
5625         struct osd_thread_info *info = data;
5626
5627         LASSERT(info->oti_r_locks == 0);
5628         LASSERT(info->oti_w_locks == 0);
5629         LASSERT(info->oti_txns    == 0);
5630 }
5631
5632 /* type constructor/destructor: osd_type_init, osd_type_fini */
5633 LU_TYPE_INIT_FINI(osd, &osd_key);
5634
5635 struct lu_context_key osd_key = {
5636         .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL,
5637         .lct_init = osd_key_init,
5638         .lct_fini = osd_key_fini,
5639         .lct_exit = osd_key_exit
5640 };
5641
5642
5643 static int osd_device_init(const struct lu_env *env, struct lu_device *d,
5644                            const char *name, struct lu_device *next)
5645 {
5646         struct osd_device *osd = osd_dev(d);
5647
5648         if (strlcpy(osd->od_svname, name, sizeof(osd->od_svname))
5649             >= sizeof(osd->od_svname))
5650                 return -E2BIG;
5651         return osd_procfs_init(osd, name);
5652 }
5653
5654 static int osd_fid_init(const struct lu_env *env, struct osd_device *osd)
5655 {
5656         struct seq_server_site  *ss = osd_seq_site(osd);
5657         int                     rc;
5658         ENTRY;
5659
5660         if (osd->od_is_ost || osd->od_cl_seq != NULL)
5661                 RETURN(0);
5662
5663         if (unlikely(ss == NULL))
5664                 RETURN(-ENODEV);
5665
5666         OBD_ALLOC_PTR(osd->od_cl_seq);
5667         if (osd->od_cl_seq == NULL)
5668                 RETURN(-ENOMEM);
5669
5670         rc = seq_client_init(osd->od_cl_seq, NULL, LUSTRE_SEQ_METADATA,
5671                              osd->od_svname, ss->ss_server_seq);
5672
5673         if (rc != 0) {
5674                 OBD_FREE_PTR(osd->od_cl_seq);
5675                 osd->od_cl_seq = NULL;
5676         }
5677
5678         RETURN(rc);
5679 }
5680
5681 static void osd_fid_fini(const struct lu_env *env, struct osd_device *osd)
5682 {
5683         if (osd->od_cl_seq == NULL)
5684                 return;
5685
5686         seq_client_fini(osd->od_cl_seq);
5687         OBD_FREE_PTR(osd->od_cl_seq);
5688         osd->od_cl_seq = NULL;
5689 }
5690
5691 static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
5692 {
5693         ENTRY;
5694
5695         /* shutdown quota slave instance associated with the device */
5696         if (o->od_quota_slave != NULL) {
5697                 qsd_fini(env, o->od_quota_slave);
5698                 o->od_quota_slave = NULL;
5699         }
5700
5701         osd_fid_fini(env, o);
5702
5703         RETURN(0);
5704 }
5705
5706 static void osd_umount(const struct lu_env *env, struct osd_device *o)
5707 {
5708         ENTRY;
5709
5710         if (o->od_mnt != NULL) {
5711                 shrink_dcache_sb(osd_sb(o));
5712                 osd_sync(env, &o->od_dt_dev);
5713
5714                 mntput(o->od_mnt);
5715                 o->od_mnt = NULL;
5716         }
5717
5718         EXIT;
5719 }
5720
5721 static int osd_mount(const struct lu_env *env,
5722                      struct osd_device *o, struct lustre_cfg *cfg)
5723 {
5724         const char              *name  = lustre_cfg_string(cfg, 0);
5725         const char              *dev  = lustre_cfg_string(cfg, 1);
5726         const char              *opts;
5727         unsigned long            page, s_flags, lmd_flags = 0;
5728         struct page             *__page;
5729         struct file_system_type *type;
5730         char                    *options = NULL;
5731         char                    *str;
5732         struct osd_thread_info  *info = osd_oti_get(env);
5733         struct lu_fid           *fid = &info->oti_fid;
5734         struct inode            *inode;
5735         int                      rc = 0;
5736         ENTRY;
5737
5738         if (o->od_mnt != NULL)
5739                 RETURN(0);
5740
5741         if (strlen(dev) >= sizeof(o->od_mntdev))
5742                 RETURN(-E2BIG);
5743         strcpy(o->od_mntdev, dev);
5744
5745         OBD_PAGE_ALLOC(__page, GFP_IOFS);
5746         if (__page == NULL)
5747                 GOTO(out, rc = -ENOMEM);
5748
5749         str = lustre_cfg_string(cfg, 2);
5750         s_flags = simple_strtoul(str, NULL, 0);
5751         str = strstr(str, ":");
5752         if (str)
5753                 lmd_flags = simple_strtoul(str + 1, NULL, 0);
5754         opts = lustre_cfg_string(cfg, 3);
5755         page = (unsigned long)page_address(__page);
5756         options = (char *)page;
5757         *options = '\0';
5758         if (opts == NULL)
5759                 strcat(options, "user_xattr,acl");
5760         else
5761                 strcat(options, opts);
5762
5763         /* Glom up mount options */
5764         if (*options != '\0')
5765                 strcat(options, ",");
5766         strlcat(options, "no_mbcache", PAGE_CACHE_SIZE);
5767
5768         type = get_fs_type("ldiskfs");
5769         if (!type) {
5770                 CERROR("%s: cannot find ldiskfs module\n", name);
5771                 GOTO(out, rc = -ENODEV);
5772         }
5773
5774         o->od_mnt = vfs_kern_mount(type, s_flags, dev, options);
5775         module_put(type->owner);
5776
5777         if (IS_ERR(o->od_mnt)) {
5778                 rc = PTR_ERR(o->od_mnt);
5779                 o->od_mnt = NULL;
5780                 CERROR("%s: can't mount %s: %d\n", name, dev, rc);
5781                 GOTO(out, rc);
5782         }
5783
5784 #ifdef HAVE_DEV_SET_RDONLY
5785         if (dev_check_rdonly(o->od_mnt->mnt_sb->s_bdev)) {
5786                 CERROR("%s: underlying device %s is marked as read-only. "
5787                        "Setup failed\n", name, dev);
5788                 GOTO(out_mnt, rc = -EROFS);
5789         }
5790 #endif
5791
5792         if (!LDISKFS_HAS_COMPAT_FEATURE(o->od_mnt->mnt_sb,
5793                                         LDISKFS_FEATURE_COMPAT_HAS_JOURNAL)) {
5794                 CERROR("%s: device %s is mounted w/o journal\n", name, dev);
5795                 GOTO(out_mnt, rc = -EINVAL);
5796         }
5797
5798 #ifdef LDISKFS_MOUNT_DIRDATA
5799         if (LDISKFS_HAS_INCOMPAT_FEATURE(o->od_mnt->mnt_sb,
5800                                          LDISKFS_FEATURE_INCOMPAT_DIRDATA))
5801                 LDISKFS_SB(osd_sb(o))->s_mount_opt |= LDISKFS_MOUNT_DIRDATA;
5802         else if (!o->od_is_ost)
5803                 CWARN("%s: device %s was upgraded from Lustre-1.x without "
5804                       "enabling the dirdata feature. If you do not want to "
5805                       "downgrade to Lustre-1.x again, you can enable it via "
5806                       "'tune2fs -O dirdata device'\n", name, dev);
5807 #endif
5808         inode = osd_sb(o)->s_root->d_inode;
5809         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
5810         rc = osd_ea_fid_set(info, inode, fid, LMAC_NOT_IN_OI, 0);
5811         if (rc != 0) {
5812                 CERROR("%s: failed to set lma on %s root inode\n", name, dev);
5813                 GOTO(out_mnt, rc);
5814         }
5815
5816         if (lmd_flags & LMD_FLG_NOSCRUB)
5817                 o->od_noscrub = 1;
5818
5819         GOTO(out, rc = 0);
5820
5821 out_mnt:
5822         mntput(o->od_mnt);
5823         o->od_mnt = NULL;
5824
5825 out:
5826         if (__page)
5827                 OBD_PAGE_FREE(__page);
5828
5829         return rc;
5830 }
5831
5832 static struct lu_device *osd_device_fini(const struct lu_env *env,
5833                                          struct lu_device *d)
5834 {
5835         struct osd_device *o = osd_dev(d);
5836         ENTRY;
5837
5838         osd_shutdown(env, o);
5839         osd_procfs_fini(o);
5840         osd_scrub_cleanup(env, o);
5841         osd_obj_map_fini(o);
5842         osd_umount(env, o);
5843
5844         RETURN(NULL);
5845 }
5846
5847 static int osd_device_init0(const struct lu_env *env,
5848                             struct osd_device *o,
5849                             struct lustre_cfg *cfg)
5850 {
5851         struct lu_device        *l = osd2lu_dev(o);
5852         struct osd_thread_info *info;
5853         int                     rc;
5854         int                     cplen = 0;
5855
5856         /* if the module was re-loaded, env can loose its keys */
5857         rc = lu_env_refill((struct lu_env *) env);
5858         if (rc)
5859                 GOTO(out, rc);
5860         info = osd_oti_get(env);
5861         LASSERT(info);
5862
5863         l->ld_ops = &osd_lu_ops;
5864         o->od_dt_dev.dd_ops = &osd_dt_ops;
5865
5866         spin_lock_init(&o->od_osfs_lock);
5867         mutex_init(&o->od_otable_mutex);
5868
5869         o->od_capa_hash = init_capa_hash();
5870         if (o->od_capa_hash == NULL)
5871                 GOTO(out, rc = -ENOMEM);
5872
5873         o->od_read_cache = 1;
5874         o->od_writethrough_cache = 1;
5875         o->od_readcache_max_filesize = OSD_MAX_CACHE_SIZE;
5876
5877         cplen = strlcpy(o->od_svname, lustre_cfg_string(cfg, 4),
5878                         sizeof(o->od_svname));
5879         if (cplen >= sizeof(o->od_svname)) {
5880                 rc = -E2BIG;
5881                 GOTO(out_capa, rc);
5882         }
5883
5884         if (server_name_is_ost(o->od_svname))
5885                 o->od_is_ost = 1;
5886
5887         rc = osd_mount(env, o, cfg);
5888         if (rc != 0)
5889                 GOTO(out_capa, rc);
5890
5891         rc = osd_obj_map_init(env, o);
5892         if (rc != 0)
5893                 GOTO(out_mnt, rc);
5894
5895         rc = lu_site_init(&o->od_site, l);
5896         if (rc != 0)
5897                 GOTO(out_compat, rc);
5898         o->od_site.ls_bottom_dev = l;
5899
5900         rc = lu_site_init_finish(&o->od_site);
5901         if (rc != 0)
5902                 GOTO(out_site, rc);
5903
5904         /* self-repair LMA by default */
5905         o->od_lma_self_repair = 1;
5906
5907         INIT_LIST_HEAD(&o->od_ios_list);
5908         /* setup scrub, including OI files initialization */
5909         rc = osd_scrub_setup(env, o);
5910         if (rc < 0)
5911                 GOTO(out_site, rc);
5912
5913         rc = osd_procfs_init(o, o->od_svname);
5914         if (rc != 0) {
5915                 CERROR("%s: can't initialize procfs: rc = %d\n",
5916                        o->od_svname, rc);
5917                 GOTO(out_scrub, rc);
5918         }
5919
5920         LASSERT(l->ld_site->ls_linkage.next && l->ld_site->ls_linkage.prev);
5921
5922         /* initialize quota slave instance */
5923         o->od_quota_slave = qsd_init(env, o->od_svname, &o->od_dt_dev,
5924                                      o->od_proc_entry);
5925         if (IS_ERR(o->od_quota_slave)) {
5926                 rc = PTR_ERR(o->od_quota_slave);
5927                 o->od_quota_slave = NULL;
5928                 GOTO(out_procfs, rc);
5929         }
5930
5931         RETURN(0);
5932
5933 out_procfs:
5934         osd_procfs_fini(o);
5935 out_scrub:
5936         osd_scrub_cleanup(env, o);
5937 out_site:
5938         lu_site_fini(&o->od_site);
5939 out_compat:
5940         osd_obj_map_fini(o);
5941 out_mnt:
5942         osd_umount(env, o);
5943 out_capa:
5944         cleanup_capa_hash(o->od_capa_hash);
5945 out:
5946         return rc;
5947 }
5948
5949 static struct lu_device *osd_device_alloc(const struct lu_env *env,
5950                                           struct lu_device_type *t,
5951                                           struct lustre_cfg *cfg)
5952 {
5953         struct osd_device *o;
5954         int                rc;
5955
5956         OBD_ALLOC_PTR(o);
5957         if (o == NULL)
5958                 return ERR_PTR(-ENOMEM);
5959
5960         rc = dt_device_init(&o->od_dt_dev, t);
5961         if (rc == 0) {
5962                 /* Because the ctx might be revived in dt_device_init,
5963                  * refill the env here */
5964                 lu_env_refill((struct lu_env *)env);
5965                 rc = osd_device_init0(env, o, cfg);
5966                 if (rc)
5967                         dt_device_fini(&o->od_dt_dev);
5968         }
5969
5970         if (unlikely(rc != 0))
5971                 OBD_FREE_PTR(o);
5972
5973         return rc == 0 ? osd2lu_dev(o) : ERR_PTR(rc);
5974 }
5975
5976 static struct lu_device *osd_device_free(const struct lu_env *env,
5977                                          struct lu_device *d)
5978 {
5979         struct osd_device *o = osd_dev(d);
5980         ENTRY;
5981
5982         cleanup_capa_hash(o->od_capa_hash);
5983         /* XXX: make osd top device in order to release reference */
5984         d->ld_site->ls_top_dev = d;
5985         lu_site_purge(env, d->ld_site, -1);
5986         if (!cfs_hash_is_empty(d->ld_site->ls_obj_hash)) {
5987                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
5988                 lu_site_print(env, d->ld_site, &msgdata, lu_cdebug_printer);
5989         }
5990         lu_site_fini(&o->od_site);
5991         dt_device_fini(&o->od_dt_dev);
5992         OBD_FREE_PTR(o);
5993         RETURN(NULL);
5994 }
5995
5996 static int osd_process_config(const struct lu_env *env,
5997                               struct lu_device *d, struct lustre_cfg *cfg)
5998 {
5999         struct osd_device               *o = osd_dev(d);
6000         int                             rc;
6001         ENTRY;
6002
6003         switch (cfg->lcfg_command) {
6004         case LCFG_SETUP:
6005                 rc = osd_mount(env, o, cfg);
6006                 break;
6007         case LCFG_CLEANUP:
6008                 lu_dev_del_linkage(d->ld_site, d);
6009                 rc = osd_shutdown(env, o);
6010                 break;
6011         case LCFG_PARAM:
6012                 LASSERT(&o->od_dt_dev);
6013                 rc = class_process_proc_seq_param(PARAM_OSD,
6014                                                   lprocfs_osd_obd_vars,
6015                                                   cfg, &o->od_dt_dev);
6016                 if (rc > 0 || rc == -ENOSYS)
6017                         rc = class_process_proc_seq_param(PARAM_OST,
6018                                                           lprocfs_osd_obd_vars,
6019                                                           cfg, &o->od_dt_dev);
6020                 break;
6021         default:
6022                 rc = -ENOSYS;
6023         }
6024
6025         RETURN(rc);
6026 }
6027
6028 static int osd_recovery_complete(const struct lu_env *env,
6029                                  struct lu_device *d)
6030 {
6031         struct osd_device       *osd = osd_dev(d);
6032         int                      rc = 0;
6033         ENTRY;
6034
6035         if (osd->od_quota_slave == NULL)
6036                 RETURN(0);
6037
6038         /* start qsd instance on recovery completion, this notifies the quota
6039          * slave code that we are about to process new requests now */
6040         rc = qsd_start(env, osd->od_quota_slave);
6041         RETURN(rc);
6042 }
6043
6044 /*
6045  * we use exports to track all osd users
6046  */
6047 static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
6048                            struct obd_device *obd, struct obd_uuid *cluuid,
6049                            struct obd_connect_data *data, void *localdata)
6050 {
6051         struct osd_device    *osd = osd_dev(obd->obd_lu_dev);
6052         struct lustre_handle  conn;
6053         int                   rc;
6054         ENTRY;
6055
6056         CDEBUG(D_CONFIG, "connect #%d\n", osd->od_connects);
6057
6058         rc = class_connect(&conn, obd, cluuid);
6059         if (rc)
6060                 RETURN(rc);
6061
6062         *exp = class_conn2export(&conn);
6063
6064         spin_lock(&osd->od_osfs_lock);
6065         osd->od_connects++;
6066         spin_unlock(&osd->od_osfs_lock);
6067
6068         RETURN(0);
6069 }
6070
6071 /*
6072  * once last export (we don't count self-export) disappeared
6073  * osd can be released
6074  */
6075 static int osd_obd_disconnect(struct obd_export *exp)
6076 {
6077         struct obd_device *obd = exp->exp_obd;
6078         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
6079         int                rc, release = 0;
6080         ENTRY;
6081
6082         /* Only disconnect the underlying layers on the final disconnect. */
6083         spin_lock(&osd->od_osfs_lock);
6084         osd->od_connects--;
6085         if (osd->od_connects == 0)
6086                 release = 1;
6087         spin_unlock(&osd->od_osfs_lock);
6088
6089         rc = class_disconnect(exp); /* bz 9811 */
6090
6091         if (rc == 0 && release)
6092                 class_manual_cleanup(obd);
6093         RETURN(rc);
6094 }
6095
6096 static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
6097                        struct lu_device *dev)
6098 {
6099         struct osd_device *osd = osd_dev(dev);
6100         int                result = 0;
6101         ENTRY;
6102
6103         if (osd->od_quota_slave != NULL) {
6104                 /* set up quota slave objects */
6105                 result = qsd_prepare(env, osd->od_quota_slave);
6106                 if (result != 0)
6107                         RETURN(result);
6108         }
6109
6110         result = osd_fid_init(env, osd);
6111
6112         RETURN(result);
6113 }
6114
6115 int osd_fid_alloc(const struct lu_env *env, struct obd_export *exp,
6116                   struct lu_fid *fid, struct md_op_data *op_data)
6117 {
6118         struct osd_device *osd = osd_dev(exp->exp_obd->obd_lu_dev);
6119
6120         return seq_client_alloc_fid(env, osd->od_cl_seq, fid);
6121 }
6122
6123 static const struct lu_object_operations osd_lu_obj_ops = {
6124         .loo_object_init      = osd_object_init,
6125         .loo_object_delete    = osd_object_delete,
6126         .loo_object_release   = osd_object_release,
6127         .loo_object_free      = osd_object_free,
6128         .loo_object_print     = osd_object_print,
6129         .loo_object_invariant = osd_object_invariant
6130 };
6131
6132 const struct lu_device_operations osd_lu_ops = {
6133         .ldo_object_alloc      = osd_object_alloc,
6134         .ldo_process_config    = osd_process_config,
6135         .ldo_recovery_complete = osd_recovery_complete,
6136         .ldo_prepare           = osd_prepare,
6137 };
6138
6139 static const struct lu_device_type_operations osd_device_type_ops = {
6140         .ldto_init = osd_type_init,
6141         .ldto_fini = osd_type_fini,
6142
6143         .ldto_start = osd_type_start,
6144         .ldto_stop  = osd_type_stop,
6145
6146         .ldto_device_alloc = osd_device_alloc,
6147         .ldto_device_free  = osd_device_free,
6148
6149         .ldto_device_init    = osd_device_init,
6150         .ldto_device_fini    = osd_device_fini
6151 };
6152
6153 struct lu_device_type osd_device_type = {
6154         .ldt_tags     = LU_DEVICE_DT,
6155         .ldt_name     = LUSTRE_OSD_LDISKFS_NAME,
6156         .ldt_ops      = &osd_device_type_ops,
6157         .ldt_ctx_tags = LCT_LOCAL,
6158 };
6159
6160 /*
6161  * lprocfs legacy support.
6162  */
6163 static struct obd_ops osd_obd_device_ops = {
6164         .o_owner = THIS_MODULE,
6165         .o_connect      = osd_obd_connect,
6166         .o_disconnect   = osd_obd_disconnect,
6167         .o_fid_alloc    = osd_fid_alloc,
6168 };
6169
6170 static int __init osd_mod_init(void)
6171 {
6172         int rc;
6173
6174         osd_oi_mod_init();
6175
6176         rc = lu_kmem_init(ldiskfs_caches);
6177         if (rc)
6178                 return rc;
6179
6180         rc = class_register_type(&osd_obd_device_ops, NULL, true,
6181                                  lprocfs_osd_module_vars,
6182 #ifndef HAVE_ONLY_PROCFS_SEQ
6183                                  NULL,
6184 #endif
6185                                  LUSTRE_OSD_LDISKFS_NAME, &osd_device_type);
6186         if (rc)
6187                 lu_kmem_fini(ldiskfs_caches);
6188         return rc;
6189 }
6190
6191 static void __exit osd_mod_exit(void)
6192 {
6193         class_unregister_type(LUSTRE_OSD_LDISKFS_NAME);
6194         lu_kmem_fini(ldiskfs_caches);
6195 }
6196
6197 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
6198 MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_LDISKFS_NAME")");
6199 MODULE_LICENSE("GPL");
6200
6201 cfs_module(osd, "0.1.0", osd_mod_init, osd_mod_exit);