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, 2014, 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 #include <linux/user_namespace.h>
  48 #ifdef HAVE_UIDGID_HEADER
  49 # include <linux/uidgid.h>
  50 #endif
  51
  52 /* LUSTRE_VERSION_CODE */
  53 #include <lustre_ver.h>
  54 /* prerequisite for linux/xattr.h */
  55 #include <linux/types.h>
  56 /* prerequisite for linux/xattr.h */
  57 #include <linux/fs.h>
  58 /* XATTR_{REPLACE,CREATE} */
  59 #include <linux/xattr.h>
  60
  61 #include <ldiskfs/ldiskfs.h>
  62 #include <ldiskfs/xattr.h>
  63 #undef ENTRY
  64 /*
  65  * struct OBD_{ALLOC,FREE}*()
  66  * OBD_FAIL_CHECK
  67  */
  68 #include <obd_support.h>
  69 /* struct ptlrpc_thread */
  70 #include <lustre_net.h>
  71 #include <lustre_fid.h>
  72 /* process_config */
  73 #include <lustre_param.h>
  74
  75 #include "osd_internal.h"
  76 #include "osd_dynlocks.h"
  77
  78 /* llo_* api support */
  79 #include <md_object.h>
  80 #include <lustre_quota.h>
  81
  82 #include <lustre_linkea.h>
  83
  84 int ldiskfs_pdo = 1;
  85 CFS_MODULE_PARM(ldiskfs_pdo, "i", int, 0644,
  86                 "ldiskfs with parallel directory operations");
  87
  88 int ldiskfs_track_declares_assert;
  89 CFS_MODULE_PARM(ldiskfs_track_declares_assert, "i", int, 0644,
  90                 "LBUG during tracking of declares");
  91
  92 /* Slab to allocate dynlocks */
  93 struct kmem_cache *dynlock_cachep;
  94
  95 /* Slab to allocate osd_it_ea */
  96 struct kmem_cache *osd_itea_cachep;
  97
  98 static struct lu_kmem_descr ldiskfs_caches[] = {
  99         {
 100                 .ckd_cache = &dynlock_cachep,
 101                 .ckd_name  = "dynlock_cache",
 102                 .ckd_size  = sizeof(struct dynlock_handle)
 103         },
 104         {
 105                 .ckd_cache = &osd_itea_cachep,
 106                 .ckd_name  = "osd_itea_cache",
 107                 .ckd_size  = sizeof(struct osd_it_ea)
 108         },
 109         {
 110                 .ckd_cache = NULL
 111         }
 112 };
 113
 114 static const char dot[] = ".";
 115 static const char dotdot[] = "..";
 116 static const char remote_obj_dir[] = "REM_OBJ_DIR";
 117
 118 static const struct lu_object_operations      osd_lu_obj_ops;
 119 static const struct dt_object_operations      osd_obj_ops;
 120 static const struct dt_object_operations      osd_obj_ea_ops;
 121 static const struct dt_object_operations      osd_obj_otable_it_ops;
 122 static const struct dt_index_operations       osd_index_iam_ops;
 123 static const struct dt_index_operations       osd_index_ea_ops;
 124
 125 int osd_trans_declare_op2rb[] = {
 126         [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
 127         [OSD_OT_PUNCH]          = OSD_OT_MAX,
 128         [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
 129         [OSD_OT_CREATE]         = OSD_OT_DESTROY,
 130         [OSD_OT_DESTROY]        = OSD_OT_CREATE,
 131         [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
 132         [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
 133         [OSD_OT_WRITE]          = OSD_OT_WRITE,
 134         [OSD_OT_INSERT]         = OSD_OT_DELETE,
 135         [OSD_OT_DELETE]         = OSD_OT_INSERT,
 136         [OSD_OT_QUOTA]          = OSD_OT_MAX,
 137 };
 138
 139 static int osd_has_index(const struct osd_object *obj)
 140 {
 141         return obj->oo_dt.do_index_ops != NULL;
 142 }
 143
 144 static int osd_object_invariant(const struct lu_object *l)
 145 {
 146         return osd_invariant(osd_obj(l));
 147 }
 148
 149 /*
 150  * Concurrency: doesn't matter
 151  */
 152
 153 /*
 154  * Concurrency: doesn't matter
 155  */
 156 static int osd_write_locked(const struct lu_env *env, struct osd_object *o)
 157 {
 158         struct osd_thread_info *oti = osd_oti_get(env);
 159         return oti->oti_w_locks > 0 && o->oo_owner == env;
 160 }
 161
 162 /*
 163  * Concurrency: doesn't access mutable data
 164  */
 165 static int osd_root_get(const struct lu_env *env,
 166                         struct dt_device *dev, struct lu_fid *f)
 167 {
 168         lu_local_obj_fid(f, OSD_FS_ROOT_OID);
 169         return 0;
 170 }
 171
 172 /*
 173  * OSD object methods.
 174  */
 175
 176 /*
 177  * Concurrency: no concurrent access is possible that early in object
 178  * life-cycle.
 179  */
 180 static struct lu_object *osd_object_alloc(const struct lu_env *env,
 181                                           const struct lu_object_header *hdr,
 182                                           struct lu_device *d)
 183 {
 184         struct osd_object *mo;
 185
 186         OBD_ALLOC_PTR(mo);
 187         if (mo != NULL) {
 188                 struct lu_object *l;
 189
 190                 l = &mo->oo_dt.do_lu;
 191                 dt_object_init(&mo->oo_dt, NULL, d);
 192                 mo->oo_dt.do_ops = &osd_obj_ea_ops;
 193                 l->lo_ops = &osd_lu_obj_ops;
 194                 init_rwsem(&mo->oo_sem);
 195                 init_rwsem(&mo->oo_ext_idx_sem);
 196                 spin_lock_init(&mo->oo_guard);
 197                 return l;
 198         } else {
 199                 return NULL;
 200         }
 201 }
 202
 203 int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
 204                 struct dentry *dentry, struct lustre_mdt_attrs *lma)
 205 {
 206         int rc;
 207
 208         CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
 209         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 210                              info->oti_mdt_attrs_old, LMA_OLD_SIZE);
 211         if (rc > 0) {
 212                 if ((void *)lma != (void *)info->oti_mdt_attrs_old)
 213                         memcpy(lma, info->oti_mdt_attrs_old, sizeof(*lma));
 214                 rc = 0;
 215                 lustre_lma_swab(lma);
 216                 /* Check LMA compatibility */
 217                 if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
 218                         CWARN("%.16s: unsupported incompat LMA feature(s) %#x "
 219                               "for fid = "DFID", ino = %lu\n",
 220                               LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
 221                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 222                               PFID(&lma->lma_self_fid), inode->i_ino);
 223                         rc = -EOPNOTSUPP;
 224                 }
 225         } else if (rc == 0) {
 226                 rc = -ENODATA;
 227         }
 228
 229         return rc;
 230 }
 231
 232 /*
 233  * retrieve object from backend ext fs.
 234  **/
 235 struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
 236                        struct osd_inode_id *id)
 237 {
 238         struct inode *inode = NULL;
 239
 240         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
 241         if (IS_ERR(inode)) {
 242                 CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
 243                        id->oii_ino, PTR_ERR(inode));
 244         } else if (id->oii_gen != OSD_OII_NOGEN &&
 245                    inode->i_generation != id->oii_gen) {
 246                 CDEBUG(D_INODE, "unmatched inode: ino = %u, oii_gen = %u, "
 247                        "i_generation = %u\n",
 248                        id->oii_ino, id->oii_gen, inode->i_generation);
 249                 iput(inode);
 250                 inode = ERR_PTR(-ESTALE);
 251         } else if (inode->i_nlink == 0) {
 252                 /* due to parallel readdir and unlink,
 253                 * we can have dead inode here. */
 254                 CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
 255                 iput(inode);
 256                 inode = ERR_PTR(-ESTALE);
 257         } else if (is_bad_inode(inode)) {
 258                 CWARN("%.16s: bad inode: ino = %u\n",
 259                 LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name, id->oii_ino);
 260                 iput(inode);
 261                 inode = ERR_PTR(-ENOENT);
 262         } else {
 263                 if (id->oii_gen == OSD_OII_NOGEN)
 264                         osd_id_gen(id, inode->i_ino, inode->i_generation);
 265
 266                 /* Do not update file c/mtime in ldiskfs.
 267                  * NB: we don't have any lock to protect this because we don't
 268                  * have reference on osd_object now, but contention with
 269                  * another lookup + attr_set can't happen in the tiny window
 270                  * between if (...) and set S_NOCMTIME. */
 271                 if (!(inode->i_flags & S_NOCMTIME))
 272                         inode->i_flags |= S_NOCMTIME;
 273         }
 274         return inode;
 275 }
 276
 277 static struct inode *
 278 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
 279              struct osd_inode_id *id, struct lu_fid *fid)
 280 {
 281         struct lustre_mdt_attrs *lma   = &info->oti_mdt_attrs;
 282         struct inode            *inode;
 283         int                      rc;
 284
 285         inode = osd_iget(info, dev, id);
 286         if (IS_ERR(inode))
 287                 return inode;
 288
 289         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
 290         if (rc == 0) {
 291                 *fid = lma->lma_self_fid;
 292         } else if (rc == -ENODATA) {
 293                 if (unlikely(inode == osd_sb(dev)->s_root->d_inode))
 294                         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
 295                 else
 296                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 297         } else {
 298                 iput(inode);
 299                 inode = ERR_PTR(rc);
 300         }
 301         return inode;
 302 }
 303
 304 /**
 305  * \retval +v: new filter_fid, does not contain self-fid
 306  * \retval 0:  filter_fid_old, contains self-fid
 307  * \retval -v: other failure cases
 308  */
 309 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
 310                  struct dentry *dentry, struct lu_fid *fid)
 311 {
 312         struct filter_fid_old   *ff     = &info->oti_ff;
 313         struct ost_id           *ostid  = &info->oti_ostid;
 314         int                      rc;
 315
 316         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
 317         if (rc == sizeof(*ff)) {
 318                 rc = 0;
 319                 ostid_set_seq(ostid, le64_to_cpu(ff->ff_seq));
 320                 ostid_set_id(ostid, le64_to_cpu(ff->ff_objid));
 321                 /* XXX: should use real OST index in the future. LU-3569 */
 322                 ostid_to_fid(fid, ostid, 0);
 323         } else if (rc == sizeof(struct filter_fid)) {
 324                 rc = 1;
 325         } else if (rc >= 0) {
 326                 rc = -EINVAL;
 327         }
 328
 329         return rc;
 330 }
 331
 332 static int osd_lma_self_repair(struct osd_thread_info *info,
 333                                struct osd_device *osd, struct inode *inode,
 334                                const struct lu_fid *fid, __u32 compat)
 335 {
 336         handle_t *jh;
 337         int       rc;
 338
 339         LASSERT(current->journal_info == NULL);
 340
 341         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
 342                                   osd_dto_credits_noquota[DTO_XATTR_SET]);
 343         if (IS_ERR(jh)) {
 344                 rc = PTR_ERR(jh);
 345                 CWARN("%s: cannot start journal for lma_self_repair: rc = %d\n",
 346                       osd_name(osd), rc);
 347                 return rc;
 348         }
 349
 350         rc = osd_ea_fid_set(info, inode, fid, compat, 0);
 351         if (rc != 0)
 352                 CWARN("%s: cannot self repair the LMA: rc = %d\n",
 353                       osd_name(osd), rc);
 354         ldiskfs_journal_stop(jh);
 355         return rc;
 356 }
 357
 358 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
 359 {
 360         struct osd_thread_info  *info   = osd_oti_get(env);
 361         struct osd_device       *osd    = osd_obj2dev(obj);
 362         struct lustre_mdt_attrs *lma    = &info->oti_mdt_attrs;
 363         struct inode            *inode  = obj->oo_inode;
 364         struct dentry           *dentry = &info->oti_obj_dentry;
 365         struct lu_fid           *fid    = NULL;
 366         const struct lu_fid     *rfid   = lu_object_fid(&obj->oo_dt.do_lu);
 367         int                      rc;
 368         ENTRY;
 369
 370         CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
 371         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 372                              info->oti_mdt_attrs_old, LMA_OLD_SIZE);
 373         if (rc == -ENODATA && !fid_is_igif(rfid) && osd->od_check_ff) {
 374                 fid = &lma->lma_self_fid;
 375                 rc = osd_get_idif(info, inode, dentry, fid);
 376                 if ((rc > 0) || (rc == -ENODATA && osd->od_index_in_idif)) {
 377                         /* For the given OST-object, if it has neither LMA nor
 378                          * FID in XATTR_NAME_FID, then the given FID (which is
 379                          * contained in the @obj, from client RPC for locating
 380                          * the OST-object) is trusted. We use it to generate
 381                          * the LMA. */
 382                         osd_lma_self_repair(info, osd, inode, rfid,
 383                                             LMAC_FID_ON_OST);
 384                         RETURN(0);
 385                 }
 386         }
 387
 388         if (unlikely(rc == -ENODATA))
 389                 RETURN(0);
 390
 391         if (rc < 0)
 392                 RETURN(rc);
 393
 394         if (rc > 0) {
 395                 rc = 0;
 396                 lustre_lma_swab(lma);
 397                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
 398                              CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT))) {
 399                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
 400                               "fid = "DFID", ino = %lu\n", osd_name(osd),
 401                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 402                               PFID(rfid), inode->i_ino);
 403                         rc = -EOPNOTSUPP;
 404                 } else {
 405                         fid = &lma->lma_self_fid;
 406                 }
 407         }
 408
 409         if (fid != NULL && unlikely(!lu_fid_eq(rfid, fid))) {
 410                 if (fid_is_idif(rfid) && fid_is_idif(fid)) {
 411                         struct ost_id   *oi   = &info->oti_ostid;
 412                         struct lu_fid   *fid1 = &info->oti_fid3;
 413                         __u32            idx  = fid_idif_ost_idx(rfid);
 414
 415                         /* For old IDIF, the OST index is not part of the IDIF,
 416                          * Means that different OSTs may have the same IDIFs.
 417                          * Under such case, we need to make some compatible
 418                          * check to make sure to trigger OI scrub properly. */
 419                         if (idx != 0 && fid_idif_ost_idx(fid) == 0) {
 420                                 /* Given @rfid is new, LMA is old. */
 421                                 fid_to_ostid(fid, oi);
 422                                 ostid_to_fid(fid1, oi, idx);
 423                                 if (lu_fid_eq(fid1, rfid)) {
 424                                         if (osd->od_index_in_idif)
 425                                                 osd_lma_self_repair(info, osd,
 426                                                         inode, rfid,
 427                                                         LMAC_FID_ON_OST);
 428                                         RETURN(0);
 429                                 }
 430                         }
 431                 }
 432
 433                 rc = -EREMCHG;
 434         }
 435
 436         RETURN(rc);
 437 }
 438
 439 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
 440                           const struct lu_fid *fid,
 441                           const struct lu_object_conf *conf)
 442 {
 443         struct osd_thread_info *info;
 444         struct lu_device       *ldev   = obj->oo_dt.do_lu.lo_dev;
 445         struct osd_device      *dev;
 446         struct osd_idmap_cache *oic;
 447         struct osd_inode_id    *id;
 448         struct inode           *inode;
 449         struct osd_scrub       *scrub;
 450         struct scrub_file      *sf;
 451         int                     result;
 452         int                     saved  = 0;
 453         bool                    in_oi  = false;
 454         bool                    in_cache = false;
 455         bool                    triggered = false;
 456         ENTRY;
 457
 458         LINVRNT(osd_invariant(obj));
 459         LASSERT(obj->oo_inode == NULL);
 460         LASSERTF(fid_is_sane(fid) || fid_is_idif(fid), DFID"\n", PFID(fid));
 461
 462         dev = osd_dev(ldev);
 463         scrub = &dev->od_scrub;
 464         sf = &scrub->os_file;
 465         info = osd_oti_get(env);
 466         LASSERT(info);
 467         oic = &info->oti_cache;
 468
 469         if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
 470                 RETURN(-ENOENT);
 471
 472         /* For the object is created as locking anchor, or for the object to
 473          * be created on disk. No need to osd_oi_lookup() at here because FID
 474          * shouldn't never be re-used, if it's really a duplicate FID from
 475          * unexpected reason, we should be able to detect it later by calling
 476          * do_create->osd_oi_insert(). */
 477         if (conf != NULL && conf->loc_flags & LOC_F_NEW)
 478                 GOTO(out, result = 0);
 479
 480         /* Search order: 1. per-thread cache. */
 481         if (lu_fid_eq(fid, &oic->oic_fid) &&
 482             likely(oic->oic_dev == dev)) {
 483                 id = &oic->oic_lid;
 484                 in_cache = true;
 485                 goto iget;
 486         }
 487
 488         id = &info->oti_id;
 489         if (!list_empty(&scrub->os_inconsistent_items)) {
 490                 /* Search order: 2. OI scrub pending list. */
 491                 result = osd_oii_lookup(dev, fid, id);
 492                 if (result == 0)
 493                         goto iget;
 494         }
 495
 496         /* Search order: 3. OI files. */
 497         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
 498         if (result == -ENOENT) {
 499                 if (!(fid_is_norm(fid) || fid_is_igif(fid)) ||
 500                     !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
 501                                       sf->sf_oi_bitmap))
 502                         GOTO(out, result = 0);
 503
 504                 goto trigger;
 505         }
 506
 507         if (result != 0)
 508                 GOTO(out, result);
 509
 510         in_oi = true;
 511
 512 iget:
 513         inode = osd_iget(info, dev, id);
 514         if (IS_ERR(inode)) {
 515                 result = PTR_ERR(inode);
 516                 if (result != -ENOENT && result != -ESTALE)
 517                         GOTO(out, result);
 518
 519                 if (in_cache)
 520                         fid_zero(&oic->oic_fid);
 521
 522                 result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
 523                 if (result != 0)
 524                         GOTO(out, result = (result == -ENOENT ? 0 : result));
 525
 526                 /* The OI mapping is there, but the inode is NOT there.
 527                  * Two possible cases for that:
 528                  *
 529                  * 1) Backup/restore caused the OI invalid.
 530                  * 2) Someone unlinked the object but NOT removed
 531                  *    the OI mapping, such as mount target device
 532                  *    as ldiskfs, and modify something directly.
 533                  *
 534                  * Generally, when the device is mounted, it will
 535                  * auto check whether the system is restored from
 536                  * file-level backup or not. We trust such detect
 537                  * to distinguish the 1st case from the 2nd case. */
 538                 if (!(scrub->os_file.sf_flags & SF_INCONSISTENT))
 539                         GOTO(out, result = 0);
 540
 541 trigger:
 542                 if (unlikely(triggered))
 543                         GOTO(out, result = saved);
 544
 545                 triggered = true;
 546                 if (thread_is_running(&scrub->os_thread)) {
 547                         result = -EINPROGRESS;
 548                 } else if (!dev->od_noscrub) {
 549                         /* Since we do not know the right OI mapping, we have
 550                          * to trigger OI scrub to scan the whole device. */
 551                         result = osd_scrub_start(dev, SS_AUTO_FULL |
 552                                 SS_CLEAR_DRYRUN | SS_CLEAR_FAILOUT);
 553                         CDEBUG(D_LFSCK | D_CONSOLE, "%.16s: trigger OI "
 554                                "scrub by RPC for "DFID", rc = %d [1]\n",
 555                                osd_name(dev), PFID(fid), result);
 556                         if (result == 0 || result == -EALREADY)
 557                                 result = -EINPROGRESS;
 558                         else
 559                                 result = -EREMCHG;
 560                 }
 561
 562                 /* We still have chance to get the valid inode: for the
 563                  * object which is referenced by remote name entry, the
 564                  * object on the local MDT will be linked under the dir
 565                  * of "/REMOTE_PARENT_DIR" with its FID string as name.
 566                  *
 567                  * We do not know whether the object for the given FID
 568                  * is referenced by some remote name entry or not, and
 569                  * especially for DNE II, a multiple-linked object may
 570                  * have many name entries reside on many MDTs.
 571                  *
 572                  * To simplify the operation, OSD will not distinguish
 573                  * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
 574                  * only happened for the RPC from other MDT during the
 575                  * OI scrub, or for the client side RPC with FID only,
 576                  * such as FID to path, or from old connected client. */
 577                 saved = result;
 578                 result = osd_lookup_in_remote_parent(info, dev, fid, id);
 579                 if (result == 0) {
 580                         in_oi = false;
 581                         goto iget;
 582                 }
 583
 584                 GOTO(out, result = saved);
 585         }
 586
 587         obj->oo_inode = inode;
 588         LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
 589
 590         result = osd_check_lma(env, obj);
 591         if (result != 0) {
 592                 iput(inode);
 593                 obj->oo_inode = NULL;
 594
 595                 if (result != -EREMCHG)
 596                         GOTO(out, result);
 597
 598                 if (in_cache)
 599                         fid_zero(&oic->oic_fid);
 600
 601                 result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
 602                 if (result == 0)
 603                         goto trigger;
 604
 605                 if (result != -ENOENT)
 606                         GOTO(out, result);
 607
 608                 if (!in_oi && (fid_is_norm(fid) || fid_is_igif(fid)) &&
 609                     ldiskfs_test_bit(osd_oi_fid2idx(dev, fid),
 610                                      sf->sf_oi_bitmap))
 611                         goto trigger;
 612
 613                 GOTO(out, result = 0);
 614         }
 615
 616         obj->oo_compat_dot_created = 1;
 617         obj->oo_compat_dotdot_created = 1;
 618
 619         if (!S_ISDIR(inode->i_mode) || !ldiskfs_pdo) /* done */
 620                 GOTO(out, result = 0);
 621
 622         LASSERT(obj->oo_hl_head == NULL);
 623         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
 624         if (obj->oo_hl_head == NULL) {
 625                 obj->oo_inode = NULL;
 626                 iput(inode);
 627                 GOTO(out, result = -ENOMEM);
 628         }
 629         GOTO(out, result = 0);
 630
 631 out:
 632         LINVRNT(osd_invariant(obj));
 633         return result;
 634 }
 635
 636 /*
 637  * Concurrency: shouldn't matter.
 638  */
 639 static void osd_object_init0(struct osd_object *obj)
 640 {
 641         LASSERT(obj->oo_inode != NULL);
 642         obj->oo_dt.do_body_ops = &osd_body_ops;
 643         obj->oo_dt.do_lu.lo_header->loh_attr |=
 644                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
 645 }
 646
 647 /*
 648  * Concurrency: no concurrent access is possible that early in object
 649  * life-cycle.
 650  */
 651 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
 652                            const struct lu_object_conf *conf)
 653 {
 654         struct osd_object *obj = osd_obj(l);
 655         int result;
 656
 657         LINVRNT(osd_invariant(obj));
 658
 659         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
 660                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
 661                 l->lo_header->loh_attr |= LOHA_EXISTS;
 662                 return 0;
 663         }
 664
 665         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
 666         obj->oo_dt.do_body_ops = &osd_body_ops_new;
 667         if (result == 0 && obj->oo_inode != NULL)
 668                 osd_object_init0(obj);
 669
 670         LINVRNT(osd_invariant(obj));
 671         return result;
 672 }
 673
 674 /*
 675  * Concurrency: no concurrent access is possible that late in object
 676  * life-cycle.
 677  */
 678 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
 679 {
 680         struct osd_object *obj = osd_obj(l);
 681
 682         LINVRNT(osd_invariant(obj));
 683
 684         dt_object_fini(&obj->oo_dt);
 685         if (obj->oo_hl_head != NULL)
 686                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
 687         OBD_FREE_PTR(obj);
 688 }
 689
 690 /*
 691  * Concurrency: no concurrent access is possible that late in object
 692  * life-cycle.
 693  */
 694 static void osd_index_fini(struct osd_object *o)
 695 {
 696         struct iam_container *bag;
 697
 698         if (o->oo_dir != NULL) {
 699                 bag = &o->oo_dir->od_container;
 700                 if (o->oo_inode != NULL) {
 701                         if (bag->ic_object == o->oo_inode)
 702                                 iam_container_fini(bag);
 703                 }
 704                 OBD_FREE_PTR(o->oo_dir);
 705                 o->oo_dir = NULL;
 706         }
 707 }
 708
 709 /*
 710  * Concurrency: no concurrent access is possible that late in object
 711  * life-cycle (for all existing callers, that is. New callers have to provide
 712  * their own locking.)
 713  */
 714 static int osd_inode_unlinked(const struct inode *inode)
 715 {
 716         return inode->i_nlink == 0;
 717 }
 718
 719 enum {
 720         OSD_TXN_OI_DELETE_CREDITS    = 20,
 721         OSD_TXN_INODE_DELETE_CREDITS = 20
 722 };
 723
 724 /*
 725  * Journal
 726  */
 727
 728 #if OSD_THANDLE_STATS
 729 /**
 730  * Set time when the handle is allocated
 731  */
 732 static void osd_th_alloced(struct osd_thandle *oth)
 733 {
 734         oth->oth_alloced = cfs_time_current();
 735 }
 736
 737 /**
 738  * Set time when the handle started
 739  */
 740 static void osd_th_started(struct osd_thandle *oth)
 741 {
 742         oth->oth_started = cfs_time_current();
 743 }
 744
 745 /**
 746  * Helper function to convert time interval to microseconds packed in
 747  * long int.
 748  */
 749 static long interval_to_usec(cfs_time_t start, cfs_time_t end)
 750 {
 751         struct timeval val;
 752
 753         cfs_duration_usec(cfs_time_sub(end, start), &val);
 754         return val.tv_sec * 1000000 + val.tv_usec;
 755 }
 756
 757 /**
 758  * Check whether the we deal with this handle for too long.
 759  */
 760 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
 761                                 cfs_time_t alloced, cfs_time_t started,
 762                                 cfs_time_t closed)
 763 {
 764         cfs_time_t now = cfs_time_current();
 765
 766         LASSERT(dev != NULL);
 767
 768         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
 769                             interval_to_usec(alloced, started));
 770         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
 771                             interval_to_usec(started, closed));
 772         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
 773                             interval_to_usec(closed, now));
 774
 775         if (cfs_time_before(cfs_time_add(alloced, cfs_time_seconds(30)), now)) {
 776                 CWARN("transaction handle %p was open for too long: "
 777                       "now "CFS_TIME_T" ,"
 778                       "alloced "CFS_TIME_T" ,"
 779                       "started "CFS_TIME_T" ,"
 780                       "closed "CFS_TIME_T"\n",
 781                       oth, now, alloced, started, closed);
 782                 libcfs_debug_dumpstack(NULL);
 783         }
 784 }
 785
 786 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
 787 {                                                                       \
 788         cfs_time_t __closed = cfs_time_current();                       \
 789         cfs_time_t __alloced = oth->oth_alloced;                        \
 790         cfs_time_t __started = oth->oth_started;                        \
 791                                                                         \
 792         expr;                                                           \
 793         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
 794 }
 795
 796 #else /* OSD_THANDLE_STATS */
 797
 798 #define osd_th_alloced(h)                  do {} while(0)
 799 #define osd_th_started(h)                  do {} while(0)
 800 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
 801
 802 #endif /* OSD_THANDLE_STATS */
 803
 804 /*
 805  * Concurrency: doesn't access mutable data.
 806  */
 807 static int osd_param_is_not_sane(const struct osd_device *dev,
 808                                  const struct thandle *th)
 809 {
 810         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
 811
 812         return oh->ot_credits > osd_transaction_size(dev);
 813 }
 814
 815 /*
 816  * Concurrency: shouldn't matter.
 817  */
 818 static void osd_trans_commit_cb(struct super_block *sb,
 819                                 struct ldiskfs_journal_cb_entry *jcb, int error)
 820 {
 821         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
 822         struct thandle     *th  = &oh->ot_super;
 823         struct lu_device   *lud = &th->th_dev->dd_lu_dev;
 824         struct dt_txn_commit_cb *dcb, *tmp;
 825
 826         LASSERT(oh->ot_handle == NULL);
 827
 828         if (error)
 829                 CERROR("transaction @0x%p commit error: %d\n", th, error);
 830
 831         dt_txn_hook_commit(th);
 832
 833         /* call per-transaction callbacks if any */
 834         list_for_each_entry_safe(dcb, tmp, &oh->ot_commit_dcb_list,
 835                                  dcb_linkage) {
 836                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
 837                          "commit callback entry: magic=%x name='%s'\n",
 838                          dcb->dcb_magic, dcb->dcb_name);
 839                 list_del_init(&dcb->dcb_linkage);
 840                 dcb->dcb_func(NULL, th, dcb, error);
 841         }
 842
 843         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
 844         lu_device_put(lud);
 845         th->th_dev = NULL;
 846
 847         lu_context_exit(&th->th_ctx);
 848         lu_context_fini(&th->th_ctx);
 849         OBD_FREE_PTR(oh);
 850 }
 851
 852 static struct thandle *osd_trans_create(const struct lu_env *env,
 853                                         struct dt_device *d)
 854 {
 855         struct osd_thread_info  *oti = osd_oti_get(env);
 856         struct osd_iobuf        *iobuf = &oti->oti_iobuf;
 857         struct osd_thandle      *oh;
 858         struct thandle          *th;
 859         ENTRY;
 860
 861         /* on pending IO in this thread should left from prev. request */
 862         LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
 863
 864         th = ERR_PTR(-ENOMEM);
 865         OBD_ALLOC_GFP(oh, sizeof *oh, GFP_NOFS);
 866         if (oh != NULL) {
 867                 oh->ot_quota_trans = &oti->oti_quota_trans;
 868                 memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
 869                 th = &oh->ot_super;
 870                 th->th_dev = d;
 871                 th->th_result = 0;
 872                 th->th_tags = LCT_TX_HANDLE;
 873                 oh->ot_credits = 0;
 874                 INIT_LIST_HEAD(&oh->ot_commit_dcb_list);
 875                 INIT_LIST_HEAD(&oh->ot_stop_dcb_list);
 876                 osd_th_alloced(oh);
 877
 878                 memset(oti->oti_declare_ops, 0,
 879                        sizeof(oti->oti_declare_ops));
 880                 memset(oti->oti_declare_ops_cred, 0,
 881                        sizeof(oti->oti_declare_ops_cred));
 882                 memset(oti->oti_declare_ops_used, 0,
 883                        sizeof(oti->oti_declare_ops_used));
 884         }
 885         RETURN(th);
 886 }
 887
 888 void osd_trans_dump_creds(const struct lu_env *env, struct thandle *th)
 889 {
 890         struct osd_thread_info  *oti = osd_oti_get(env);
 891         struct osd_thandle      *oh;
 892
 893         oh = container_of0(th, struct osd_thandle, ot_super);
 894         LASSERT(oh != NULL);
 895
 896         CWARN("  create: %u/%u/%u, destroy: %u/%u/%u\n",
 897               oti->oti_declare_ops[OSD_OT_CREATE],
 898               oti->oti_declare_ops_cred[OSD_OT_CREATE],
 899               oti->oti_declare_ops_used[OSD_OT_CREATE],
 900               oti->oti_declare_ops[OSD_OT_DESTROY],
 901               oti->oti_declare_ops_cred[OSD_OT_DESTROY],
 902               oti->oti_declare_ops_used[OSD_OT_DESTROY]);
 903         CWARN("  attr_set: %u/%u/%u, xattr_set: %u/%u/%u\n",
 904               oti->oti_declare_ops[OSD_OT_ATTR_SET],
 905               oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
 906               oti->oti_declare_ops_used[OSD_OT_ATTR_SET],
 907               oti->oti_declare_ops[OSD_OT_XATTR_SET],
 908               oti->oti_declare_ops_cred[OSD_OT_XATTR_SET],
 909               oti->oti_declare_ops_used[OSD_OT_XATTR_SET]);
 910         CWARN("  write: %u/%u/%u, punch: %u/%u/%u, quota %u/%u/%u\n",
 911               oti->oti_declare_ops[OSD_OT_WRITE],
 912               oti->oti_declare_ops_cred[OSD_OT_WRITE],
 913               oti->oti_declare_ops_used[OSD_OT_WRITE],
 914               oti->oti_declare_ops[OSD_OT_PUNCH],
 915               oti->oti_declare_ops_cred[OSD_OT_PUNCH],
 916               oti->oti_declare_ops_used[OSD_OT_PUNCH],
 917               oti->oti_declare_ops[OSD_OT_QUOTA],
 918               oti->oti_declare_ops_cred[OSD_OT_QUOTA],
 919               oti->oti_declare_ops_used[OSD_OT_QUOTA]);
 920         CWARN("  insert: %u/%u/%u, delete: %u/%u/%u\n",
 921               oti->oti_declare_ops[OSD_OT_INSERT],
 922               oti->oti_declare_ops_cred[OSD_OT_INSERT],
 923               oti->oti_declare_ops_used[OSD_OT_INSERT],
 924               oti->oti_declare_ops[OSD_OT_DELETE],
 925               oti->oti_declare_ops_cred[OSD_OT_DELETE],
 926               oti->oti_declare_ops_used[OSD_OT_DELETE]);
 927         CWARN("  ref_add: %u/%u/%u, ref_del: %u/%u/%u\n",
 928               oti->oti_declare_ops[OSD_OT_REF_ADD],
 929               oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
 930               oti->oti_declare_ops_used[OSD_OT_REF_ADD],
 931               oti->oti_declare_ops[OSD_OT_REF_DEL],
 932               oti->oti_declare_ops_cred[OSD_OT_REF_DEL],
 933               oti->oti_declare_ops_used[OSD_OT_REF_DEL]);
 934 }
 935
 936 /*
 937  * Concurrency: shouldn't matter.
 938  */
 939 static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
 940                            struct thandle *th)
 941 {
 942         struct osd_thread_info *oti = osd_oti_get(env);
 943         struct osd_device  *dev = osd_dt_dev(d);
 944         handle_t           *jh;
 945         struct osd_thandle *oh;
 946         int rc;
 947
 948         ENTRY;
 949
 950         LASSERT(current->journal_info == NULL);
 951
 952         oh = container_of0(th, struct osd_thandle, ot_super);
 953         LASSERT(oh != NULL);
 954         LASSERT(oh->ot_handle == NULL);
 955
 956         rc = dt_txn_hook_start(env, d, th);
 957         if (rc != 0)
 958                 GOTO(out, rc);
 959
 960         if (unlikely(osd_param_is_not_sane(dev, th))) {
 961                 static unsigned long last_printed;
 962                 static int last_credits;
 963
 964                 CWARN("%.16s: too many transaction credits (%d > %d)\n",
 965                       LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
 966                       oh->ot_credits,
 967                       osd_journal(dev)->j_max_transaction_buffers);
 968
 969                 osd_trans_dump_creds(env, th);
 970
 971                 if (last_credits != oh->ot_credits &&
 972                     time_after(jiffies, last_printed +
 973                                msecs_to_jiffies(60 * MSEC_PER_SEC))) {
 974                         libcfs_debug_dumpstack(NULL);
 975                         last_credits = oh->ot_credits;
 976                         last_printed = jiffies;
 977                 }
 978                 /* XXX Limit the credits to 'max_transaction_buffers', and
 979                  *     let the underlying filesystem to catch the error if
 980                  *     we really need so many credits.
 981                  *
 982                  *     This should be removed when we can calculate the
 983                  *     credits precisely. */
 984                 oh->ot_credits = osd_transaction_size(dev);
 985         }
 986
 987         /*
 988          * XXX temporary stuff. Some abstraction layer should
 989          * be used.
 990          */
 991         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
 992         osd_th_started(oh);
 993         if (!IS_ERR(jh)) {
 994                 oh->ot_handle = jh;
 995                 LASSERT(oti->oti_txns == 0);
 996                 lu_context_init(&th->th_ctx, th->th_tags);
 997                 lu_context_enter(&th->th_ctx);
 998
 999                 lu_device_get(&d->dd_lu_dev);
1000                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
1001                               "osd-tx", th);
1002                 oti->oti_txns++;
1003                 rc = 0;
1004         } else {
1005                 rc = PTR_ERR(jh);
1006         }
1007 out:
1008         RETURN(rc);
1009 }
1010
1011 static int osd_seq_exists(const struct lu_env *env,
1012                           struct osd_device *osd, u64 seq)
1013 {
1014         struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
1015         struct seq_server_site  *ss = osd_seq_site(osd);
1016         int                     rc;
1017         ENTRY;
1018
1019         LASSERT(ss != NULL);
1020         LASSERT(ss->ss_server_fld != NULL);
1021
1022         rc = osd_fld_lookup(env, osd, seq, range);
1023         if (rc != 0) {
1024                 if (rc != -ENOENT)
1025                         CERROR("%s: can't lookup FLD sequence "LPX64
1026                                ": rc = %d\n", osd_name(osd), seq, rc);
1027                 RETURN(0);
1028         }
1029
1030         RETURN(ss->ss_node_id == range->lsr_index);
1031 }
1032
1033 static void osd_trans_stop_cb(struct osd_thandle *oth, int result)
1034 {
1035         struct dt_txn_commit_cb *dcb;
1036         struct dt_txn_commit_cb *tmp;
1037
1038         /* call per-transaction stop callbacks if any */
1039         list_for_each_entry_safe(dcb, tmp, &oth->ot_stop_dcb_list,
1040                                  dcb_linkage) {
1041                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
1042                          "commit callback entry: magic=%x name='%s'\n",
1043                          dcb->dcb_magic, dcb->dcb_name);
1044                 list_del_init(&dcb->dcb_linkage);
1045                 dcb->dcb_func(NULL, &oth->ot_super, dcb, result);
1046         }
1047 }
1048
1049 /*
1050  * Concurrency: shouldn't matter.
1051  */
1052 static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
1053                           struct thandle *th)
1054 {
1055         int                     rc = 0;
1056         struct osd_thandle     *oh;
1057         struct osd_thread_info *oti = osd_oti_get(env);
1058         struct osd_iobuf       *iobuf = &oti->oti_iobuf;
1059         struct osd_device      *osd = osd_dt_dev(th->th_dev);
1060         struct qsd_instance    *qsd = osd->od_quota_slave;
1061         struct lquota_trans    *qtrans;
1062         ENTRY;
1063
1064         oh = container_of0(th, struct osd_thandle, ot_super);
1065
1066         qtrans = oh->ot_quota_trans;
1067         oh->ot_quota_trans = NULL;
1068
1069         if (oh->ot_handle != NULL) {
1070                 handle_t *hdl = oh->ot_handle;
1071
1072                 /*
1073                  * add commit callback
1074                  * notice we don't do this in osd_trans_start()
1075                  * as underlying transaction can change during truncate
1076                  */
1077                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
1078                                          &oh->ot_jcb);
1079
1080                 LASSERT(oti->oti_txns == 1);
1081                 oti->oti_txns--;
1082
1083                 rc = dt_txn_hook_stop(env, th);
1084                 if (rc != 0)
1085                         CERROR("%s: failed in transaction hook: rc = %d\n",
1086                                osd_name(osd), rc);
1087
1088                 osd_trans_stop_cb(oh, rc);
1089                 /* hook functions might modify th_sync */
1090                 hdl->h_sync = th->th_sync;
1091
1092                 oh->ot_handle = NULL;
1093                 OSD_CHECK_SLOW_TH(oh, osd, rc = ldiskfs_journal_stop(hdl));
1094                 if (rc != 0)
1095                         CERROR("%s: failed to stop transaction: rc = %d\n",
1096                                osd_name(osd), rc);
1097         } else {
1098                 osd_trans_stop_cb(oh, th->th_result);
1099                 OBD_FREE_PTR(oh);
1100         }
1101
1102         /* inform the quota slave device that the transaction is stopping */
1103         qsd_op_end(env, qsd, qtrans);
1104
1105         /* as we want IO to journal and data IO be concurrent, we don't block
1106          * awaiting data IO completion in osd_do_bio(), instead we wait here
1107          * once transaction is submitted to the journal. all reqular requests
1108          * don't do direct IO (except read/write), thus this wait_event becomes
1109          * no-op for them.
1110          *
1111          * IMPORTANT: we have to wait till any IO submited by the thread is
1112          * completed otherwise iobuf may be corrupted by different request
1113          */
1114         wait_event(iobuf->dr_wait,
1115                        atomic_read(&iobuf->dr_numreqs) == 0);
1116         osd_fini_iobuf(osd, iobuf);
1117         if (!rc)
1118                 rc = iobuf->dr_error;
1119
1120         RETURN(rc);
1121 }
1122
1123 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
1124 {
1125         struct osd_thandle *oh = container_of0(th, struct osd_thandle,
1126                                                ot_super);
1127
1128         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
1129         LASSERT(&dcb->dcb_func != NULL);
1130         if (dcb->dcb_flags & DCB_TRANS_STOP)
1131                 list_add(&dcb->dcb_linkage, &oh->ot_stop_dcb_list);
1132         else
1133                 list_add(&dcb->dcb_linkage, &oh->ot_commit_dcb_list);
1134
1135         return 0;
1136 }
1137
1138 /*
1139  * Called just before object is freed. Releases all resources except for
1140  * object itself (that is released by osd_object_free()).
1141  *
1142  * Concurrency: no concurrent access is possible that late in object
1143  * life-cycle.
1144  */
1145 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
1146 {
1147         struct osd_object *obj   = osd_obj(l);
1148         struct inode      *inode = obj->oo_inode;
1149
1150         LINVRNT(osd_invariant(obj));
1151
1152         /*
1153          * If object is unlinked remove fid->ino mapping from object index.
1154          */
1155
1156         osd_index_fini(obj);
1157         if (inode != NULL) {
1158                 struct qsd_instance     *qsd = osd_obj2dev(obj)->od_quota_slave;
1159                 qid_t                    uid = i_uid_read(inode);
1160                 qid_t                    gid = i_gid_read(inode);
1161
1162                 iput(inode);
1163                 obj->oo_inode = NULL;
1164
1165                 if (qsd != NULL) {
1166                         struct osd_thread_info  *info = osd_oti_get(env);
1167                         struct lquota_id_info   *qi = &info->oti_qi;
1168
1169                         /* Release granted quota to master if necessary */
1170                         qi->lqi_id.qid_uid = uid;
1171                         qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
1172
1173                         qi->lqi_id.qid_uid = gid;
1174                         qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
1175                 }
1176         }
1177 }
1178
1179 /*
1180  * Concurrency: ->loo_object_release() is called under site spin-lock.
1181  */
1182 static void osd_object_release(const struct lu_env *env,
1183                                struct lu_object *l)
1184 {
1185 }
1186
1187 /*
1188  * Concurrency: shouldn't matter.
1189  */
1190 static int osd_object_print(const struct lu_env *env, void *cookie,
1191                             lu_printer_t p, const struct lu_object *l)
1192 {
1193         struct osd_object *o = osd_obj(l);
1194         struct iam_descr  *d;
1195
1196         if (o->oo_dir != NULL)
1197                 d = o->oo_dir->od_container.ic_descr;
1198         else
1199                 d = NULL;
1200         return (*p)(env, cookie,
1201                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
1202                     o, o->oo_inode,
1203                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
1204                     o->oo_inode ? o->oo_inode->i_generation : 0,
1205                     d ? d->id_ops->id_name : "plain");
1206 }
1207
1208 #define GRANT_FOR_LOCAL_OIDS 32 /* 128kB for last_rcvd, quota files, ... */
1209
1210 /*
1211  * Concurrency: shouldn't matter.
1212  */
1213 int osd_statfs(const struct lu_env *env, struct dt_device *d,
1214                struct obd_statfs *sfs)
1215 {
1216         struct osd_device  *osd = osd_dt_dev(d);
1217         struct super_block *sb = osd_sb(osd);
1218         struct kstatfs     *ksfs;
1219         int result = 0;
1220
1221         if (unlikely(osd->od_mnt == NULL))
1222                 return -EINPROGRESS;
1223
1224         /* osd_lproc.c call this without env, allocate ksfs for that case */
1225         if (unlikely(env == NULL)) {
1226                 OBD_ALLOC_PTR(ksfs);
1227                 if (ksfs == NULL)
1228                         return -ENOMEM;
1229         } else {
1230                 ksfs = &osd_oti_get(env)->oti_ksfs;
1231         }
1232
1233         spin_lock(&osd->od_osfs_lock);
1234         result = sb->s_op->statfs(sb->s_root, ksfs);
1235         if (likely(result == 0)) { /* N.B. statfs can't really fail */
1236                 statfs_pack(sfs, ksfs);
1237                 if (unlikely(sb->s_flags & MS_RDONLY))
1238                         sfs->os_state = OS_STATE_READONLY;
1239                 if (LDISKFS_HAS_INCOMPAT_FEATURE(sb,
1240                                               LDISKFS_FEATURE_INCOMPAT_EXTENTS))
1241                         sfs->os_maxbytes = sb->s_maxbytes;
1242                 else
1243                         sfs->os_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
1244         }
1245         spin_unlock(&osd->od_osfs_lock);
1246
1247         if (unlikely(env == NULL))
1248                 OBD_FREE_PTR(ksfs);
1249
1250         /* Reserve a small amount of space for local objects like last_rcvd,
1251          * llog, quota files, ... */
1252         if (sfs->os_bavail <= GRANT_FOR_LOCAL_OIDS) {
1253                 sfs->os_bavail = 0;
1254         } else {
1255                 sfs->os_bavail -= GRANT_FOR_LOCAL_OIDS;
1256                 /** Take out metadata overhead for indirect blocks */
1257                 sfs->os_bavail -= sfs->os_bavail >> (sb->s_blocksize_bits - 3);
1258         }
1259
1260         return result;
1261 }
1262
1263 /**
1264  * Estimate space needed for file creations. We assume the largest filename
1265  * which is 2^64 - 1, hence a filename of 20 chars.
1266  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
1267  */
1268 #ifdef __LDISKFS_DIR_REC_LEN
1269 #define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
1270 #else
1271 #define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
1272 #endif
1273
1274 /*
1275  * Concurrency: doesn't access mutable data.
1276  */
1277 static void osd_conf_get(const struct lu_env *env,
1278                          const struct dt_device *dev,
1279                          struct dt_device_param *param)
1280 {
1281         struct super_block *sb = osd_sb(osd_dt_dev(dev));
1282         int                ea_overhead;
1283
1284         /*
1285          * XXX should be taken from not-yet-existing fs abstraction layer.
1286          */
1287         param->ddp_max_name_len = LDISKFS_NAME_LEN;
1288         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
1289         param->ddp_block_shift  = sb->s_blocksize_bits;
1290         param->ddp_mount_type     = LDD_MT_LDISKFS;
1291         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EXTENTS))
1292                 param->ddp_maxbytes = sb->s_maxbytes;
1293         else
1294                 param->ddp_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
1295         /* Overhead estimate should be fairly accurate, so we really take a tiny
1296          * error margin which also avoids fragmenting the filesystem too much */
1297         param->ddp_grant_reserved = 2; /* end up to be 1.9% after conversion */
1298         /* inode are statically allocated, so per-inode space consumption
1299          * is the space consumed by the directory entry */
1300         param->ddp_inodespace     = PER_OBJ_USAGE;
1301         /* per-fragment overhead to be used by the client code */
1302         param->ddp_grant_frag     = 6 * LDISKFS_BLOCK_SIZE(sb);
1303         param->ddp_mntopts      = 0;
1304         if (test_opt(sb, XATTR_USER))
1305                 param->ddp_mntopts |= MNTOPT_USERXATTR;
1306         if (test_opt(sb, POSIX_ACL))
1307                 param->ddp_mntopts |= MNTOPT_ACL;
1308
1309         /* LOD might calculate the max stripe count based on max_ea_size,
1310          * so we need take account in the overhead as well,
1311          * xattr_header + magic + xattr_entry_head */
1312         ea_overhead = sizeof(struct ldiskfs_xattr_header) + sizeof(__u32) +
1313                       LDISKFS_XATTR_LEN(XATTR_NAME_MAX_LEN);
1314
1315 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
1316         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EA_INODE))
1317                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE -
1318                                                                 ea_overhead;
1319         else
1320 #endif
1321                 param->ddp_max_ea_size = sb->s_blocksize - ea_overhead;
1322 }
1323
1324 /*
1325  * Concurrency: shouldn't matter.
1326  */
1327 static int osd_sync(const struct lu_env *env, struct dt_device *d)
1328 {
1329         int rc;
1330
1331         CDEBUG(D_CACHE, "syncing OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
1332
1333         rc = ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
1334
1335         CDEBUG(D_CACHE, "synced OSD %s: rc = %d\n",
1336                LUSTRE_OSD_LDISKFS_NAME, rc);
1337
1338         return rc;
1339 }
1340
1341 /**
1342  * Start commit for OSD device.
1343  *
1344  * An implementation of dt_commit_async method for OSD device.
1345  * Asychronously starts underlayng fs sync and thereby a transaction
1346  * commit.
1347  *
1348  * \param env environment
1349  * \param d dt device
1350  *
1351  * \see dt_device_operations
1352  */
1353 static int osd_commit_async(const struct lu_env *env,
1354                             struct dt_device *d)
1355 {
1356         struct super_block *s = osd_sb(osd_dt_dev(d));
1357         ENTRY;
1358
1359         CDEBUG(D_HA, "async commit OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
1360         RETURN(s->s_op->sync_fs(s, 0));
1361 }
1362
1363 /*
1364  * Concurrency: shouldn't matter.
1365  */
1366
1367 static int osd_ro(const struct lu_env *env, struct dt_device *d)
1368 {
1369         struct super_block *sb = osd_sb(osd_dt_dev(d));
1370         struct block_device *dev = sb->s_bdev;
1371 #ifdef HAVE_DEV_SET_RDONLY
1372         struct block_device *jdev = LDISKFS_SB(sb)->journal_bdev;
1373         int rc = 0;
1374 #else
1375         int rc = -EOPNOTSUPP;
1376 #endif
1377         ENTRY;
1378
1379 #ifdef HAVE_DEV_SET_RDONLY
1380         CERROR("*** setting %s read-only ***\n", osd_dt_dev(d)->od_svname);
1381
1382         if (jdev && (jdev != dev)) {
1383                 CDEBUG(D_IOCTL | D_HA, "set journal dev %lx rdonly\n",
1384                        (long)jdev);
1385                 dev_set_rdonly(jdev);
1386         }
1387         CDEBUG(D_IOCTL | D_HA, "set dev %lx rdonly\n", (long)dev);
1388         dev_set_rdonly(dev);
1389 #else
1390         CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
1391                osd_dt_dev(d)->od_svname, (long)dev, rc);
1392 #endif
1393         RETURN(rc);
1394 }
1395
1396 /**
1397  * Note: we do not count into QUOTA here.
1398  * If we mount with --data_journal we may need more.
1399  */
1400 const int osd_dto_credits_noquota[DTO_NR] = {
1401         /**
1402          * Insert.
1403          * INDEX_EXTRA_TRANS_BLOCKS(8) +
1404          * SINGLEDATA_TRANS_BLOCKS(8)
1405          * XXX Note: maybe iam need more, since iam have more level than
1406          *           EXT3 htree.
1407          */
1408         [DTO_INDEX_INSERT]  = 16,
1409         /**
1410          * Delete
1411          * just modify a single entry, probably merge few within a block
1412          */
1413         [DTO_INDEX_DELETE]  = 1,
1414         /**
1415          * Used for OI scrub
1416          */
1417         [DTO_INDEX_UPDATE]  = 16,
1418         /**
1419          * 4(inode, inode bits, groups, GDT)
1420          *   notice: OI updates are counted separately with DTO_INDEX_INSERT
1421          */
1422         [DTO_OBJECT_CREATE] = 4,
1423         /**
1424          * 4(inode, inode bits, groups, GDT)
1425          *   notice: OI updates are counted separately with DTO_INDEX_DELETE
1426          */
1427         [DTO_OBJECT_DELETE] = 4,
1428         /**
1429          * Attr set credits (inode)
1430          */
1431         [DTO_ATTR_SET_BASE] = 1,
1432         /**
1433          * Xattr set. The same as xattr of EXT3.
1434          * DATA_TRANS_BLOCKS(14)
1435          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
1436          * are also counted in. Do not know why?
1437          */
1438         [DTO_XATTR_SET]     = 14,
1439         /**
1440          * credits for inode change during write.
1441          */
1442         [DTO_WRITE_BASE]    = 3,
1443         /**
1444          * credits for single block write.
1445          */
1446         [DTO_WRITE_BLOCK]   = 14,
1447         /**
1448          * Attr set credits for chown.
1449          * This is extra credits for setattr, and it is null without quota
1450          */
1451         [DTO_ATTR_SET_CHOWN] = 0
1452 };
1453
1454 static const struct dt_device_operations osd_dt_ops = {
1455         .dt_root_get       = osd_root_get,
1456         .dt_statfs         = osd_statfs,
1457         .dt_trans_create   = osd_trans_create,
1458         .dt_trans_start    = osd_trans_start,
1459         .dt_trans_stop     = osd_trans_stop,
1460         .dt_trans_cb_add   = osd_trans_cb_add,
1461         .dt_conf_get       = osd_conf_get,
1462         .dt_sync           = osd_sync,
1463         .dt_ro             = osd_ro,
1464         .dt_commit_async   = osd_commit_async,
1465 };
1466
1467 static void osd_object_read_lock(const struct lu_env *env,
1468                                  struct dt_object *dt, unsigned role)
1469 {
1470         struct osd_object *obj = osd_dt_obj(dt);
1471         struct osd_thread_info *oti = osd_oti_get(env);
1472
1473         LINVRNT(osd_invariant(obj));
1474
1475         LASSERT(obj->oo_owner != env);
1476         down_read_nested(&obj->oo_sem, role);
1477
1478         LASSERT(obj->oo_owner == NULL);
1479         oti->oti_r_locks++;
1480 }
1481
1482 static void osd_object_write_lock(const struct lu_env *env,
1483                                   struct dt_object *dt, unsigned role)
1484 {
1485         struct osd_object *obj = osd_dt_obj(dt);
1486         struct osd_thread_info *oti = osd_oti_get(env);
1487
1488         LINVRNT(osd_invariant(obj));
1489
1490         LASSERT(obj->oo_owner != env);
1491         down_write_nested(&obj->oo_sem, role);
1492
1493         LASSERT(obj->oo_owner == NULL);
1494         obj->oo_owner = env;
1495         oti->oti_w_locks++;
1496 }
1497
1498 static void osd_object_read_unlock(const struct lu_env *env,
1499                                    struct dt_object *dt)
1500 {
1501         struct osd_object *obj = osd_dt_obj(dt);
1502         struct osd_thread_info *oti = osd_oti_get(env);
1503
1504         LINVRNT(osd_invariant(obj));
1505
1506         LASSERT(oti->oti_r_locks > 0);
1507         oti->oti_r_locks--;
1508         up_read(&obj->oo_sem);
1509 }
1510
1511 static void osd_object_write_unlock(const struct lu_env *env,
1512                                     struct dt_object *dt)
1513 {
1514         struct osd_object *obj = osd_dt_obj(dt);
1515         struct osd_thread_info *oti = osd_oti_get(env);
1516
1517         LINVRNT(osd_invariant(obj));
1518
1519         LASSERT(obj->oo_owner == env);
1520         LASSERT(oti->oti_w_locks > 0);
1521         oti->oti_w_locks--;
1522         obj->oo_owner = NULL;
1523         up_write(&obj->oo_sem);
1524 }
1525
1526 static int osd_object_write_locked(const struct lu_env *env,
1527                                    struct dt_object *dt)
1528 {
1529         struct osd_object *obj = osd_dt_obj(dt);
1530
1531         LINVRNT(osd_invariant(obj));
1532
1533         return obj->oo_owner == env;
1534 }
1535
1536 static struct timespec *osd_inode_time(const struct lu_env *env,
1537                                        struct inode *inode, __u64 seconds)
1538 {
1539         struct osd_thread_info  *oti = osd_oti_get(env);
1540         struct timespec         *t   = &oti->oti_time;
1541
1542         t->tv_sec = seconds;
1543         t->tv_nsec = 0;
1544         *t = timespec_trunc(*t, inode->i_sb->s_time_gran);
1545         return t;
1546 }
1547
1548
1549 static void osd_inode_getattr(const struct lu_env *env,
1550                               struct inode *inode, struct lu_attr *attr)
1551 {
1552         attr->la_valid  |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
1553                            LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
1554                            LA_FLAGS | LA_NLINK | LA_RDEV | LA_BLKSIZE |
1555                            LA_TYPE;
1556
1557         attr->la_atime   = LTIME_S(inode->i_atime);
1558         attr->la_mtime   = LTIME_S(inode->i_mtime);
1559         attr->la_ctime   = LTIME_S(inode->i_ctime);
1560         attr->la_mode    = inode->i_mode;
1561         attr->la_size    = i_size_read(inode);
1562         attr->la_blocks  = inode->i_blocks;
1563         attr->la_uid     = i_uid_read(inode);
1564         attr->la_gid     = i_gid_read(inode);
1565         attr->la_flags   = LDISKFS_I(inode)->i_flags;
1566         attr->la_nlink   = inode->i_nlink;
1567         attr->la_rdev    = inode->i_rdev;
1568         attr->la_blksize = 1 << inode->i_blkbits;
1569         attr->la_blkbits = inode->i_blkbits;
1570 }
1571
1572 static int osd_attr_get(const struct lu_env *env,
1573                         struct dt_object *dt,
1574                         struct lu_attr *attr)
1575 {
1576         struct osd_object *obj = osd_dt_obj(dt);
1577
1578         if (!dt_object_exists(dt))
1579                 return -ENOENT;
1580
1581         LASSERT(!dt_object_remote(dt));
1582         LINVRNT(osd_invariant(obj));
1583
1584         spin_lock(&obj->oo_guard);
1585         osd_inode_getattr(env, obj->oo_inode, attr);
1586         spin_unlock(&obj->oo_guard);
1587         return 0;
1588 }
1589
1590 static int osd_declare_attr_set(const struct lu_env *env,
1591                                 struct dt_object *dt,
1592                                 const struct lu_attr *attr,
1593                                 struct thandle *handle)
1594 {
1595         struct osd_thandle     *oh;
1596         struct osd_object      *obj;
1597         struct osd_thread_info *info = osd_oti_get(env);
1598         struct lquota_id_info  *qi = &info->oti_qi;
1599         qid_t                   uid;
1600         qid_t                   gid;
1601         long long               bspace;
1602         int                     rc = 0;
1603         bool                    enforce;
1604         ENTRY;
1605
1606         LASSERT(dt != NULL);
1607         LASSERT(handle != NULL);
1608
1609         obj = osd_dt_obj(dt);
1610         LASSERT(osd_invariant(obj));
1611
1612         oh = container_of0(handle, struct osd_thandle, ot_super);
1613         LASSERT(oh->ot_handle == NULL);
1614
1615         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
1616                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
1617
1618         if (attr == NULL || obj->oo_inode == NULL)
1619                 RETURN(rc);
1620
1621         bspace   = obj->oo_inode->i_blocks;
1622         bspace <<= obj->oo_inode->i_sb->s_blocksize_bits;
1623         bspace   = toqb(bspace);
1624
1625         /* Changing ownership is always preformed by super user, it should not
1626          * fail with EDQUOT.
1627          *
1628          * We still need to call the osd_declare_qid() to calculate the journal
1629          * credits for updating quota accounting files and to trigger quota
1630          * space adjustment once the operation is completed.*/
1631         if (attr->la_valid & LA_UID || attr->la_valid & LA_GID) {
1632                 /* USERQUOTA */
1633                 uid = i_uid_read(obj->oo_inode);
1634                 qi->lqi_type = USRQUOTA;
1635                 enforce = (attr->la_valid & LA_UID) && (attr->la_uid != uid);
1636                 /* inode accounting */
1637                 qi->lqi_is_blk = false;
1638
1639                 /* one more inode for the new uid ... */
1640                 qi->lqi_id.qid_uid = attr->la_uid;
1641                 qi->lqi_space      = 1;
1642                 /* Reserve credits for the new uid */
1643                 rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
1644                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1645                         rc = 0;
1646                 if (rc)
1647                         RETURN(rc);
1648
1649                 /* and one less inode for the current uid */
1650                 qi->lqi_id.qid_uid = uid;
1651                 qi->lqi_space      = -1;
1652                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1653                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1654                         rc = 0;
1655                 if (rc)
1656                         RETURN(rc);
1657
1658                 /* block accounting */
1659                 qi->lqi_is_blk = true;
1660
1661                 /* more blocks for the new uid ... */
1662                 qi->lqi_id.qid_uid = attr->la_uid;
1663                 qi->lqi_space      = bspace;
1664                 /*
1665                  * Credits for the new uid has been reserved, re-use "obj"
1666                  * to save credit reservation.
1667                  */
1668                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1669                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1670                         rc = 0;
1671                 if (rc)
1672                         RETURN(rc);
1673
1674                 /* and finally less blocks for the current uid */
1675                 qi->lqi_id.qid_uid = uid;
1676                 qi->lqi_space      = -bspace;
1677                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1678                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1679                         rc = 0;
1680                 if (rc)
1681                         RETURN(rc);
1682
1683                 /* GROUP QUOTA */
1684                 gid = i_gid_read(obj->oo_inode);
1685                 qi->lqi_type = GRPQUOTA;
1686                 enforce = (attr->la_valid & LA_GID) && (attr->la_gid != gid);
1687
1688                 /* inode accounting */
1689                 qi->lqi_is_blk = false;
1690
1691                 /* one more inode for the new gid ... */
1692                 qi->lqi_id.qid_gid = attr->la_gid;
1693                 qi->lqi_space      = 1;
1694                 rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
1695                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1696                         rc = 0;
1697                 if (rc)
1698                         RETURN(rc);
1699
1700                 /* and one less inode for the current gid */
1701                 qi->lqi_id.qid_gid = gid;
1702                 qi->lqi_space      = -1;
1703                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1704                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1705                         rc = 0;
1706                 if (rc)
1707                         RETURN(rc);
1708
1709                 /* block accounting */
1710                 qi->lqi_is_blk = true;
1711
1712                 /* more blocks for the new gid ... */
1713                 qi->lqi_id.qid_gid = attr->la_gid;
1714                 qi->lqi_space      = bspace;
1715                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1716                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1717                         rc = 0;
1718                 if (rc)
1719                         RETURN(rc);
1720
1721                 /* and finally less blocks for the current gid */
1722                 qi->lqi_id.qid_gid = gid;
1723                 qi->lqi_space      = -bspace;
1724                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1725                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1726                         rc = 0;
1727                 if (rc)
1728                         RETURN(rc);
1729         }
1730
1731         RETURN(rc);
1732 }
1733
1734 static int osd_inode_setattr(const struct lu_env *env,
1735                              struct inode *inode, const struct lu_attr *attr)
1736 {
1737         __u64 bits = attr->la_valid;
1738
1739         /* Only allow set size for regular file */
1740         if (!S_ISREG(inode->i_mode))
1741                 bits &= ~(LA_SIZE | LA_BLOCKS);
1742
1743         if (bits == 0)
1744                 return 0;
1745
1746         if (bits & LA_ATIME)
1747                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
1748         if (bits & LA_CTIME)
1749                 inode->i_ctime  = *osd_inode_time(env, inode, attr->la_ctime);
1750         if (bits & LA_MTIME)
1751                 inode->i_mtime  = *osd_inode_time(env, inode, attr->la_mtime);
1752         if (bits & LA_SIZE) {
1753                 LDISKFS_I(inode)->i_disksize = attr->la_size;
1754                 i_size_write(inode, attr->la_size);
1755         }
1756
1757 #if 0
1758         /* OSD should not change "i_blocks" which is used by quota.
1759          * "i_blocks" should be changed by ldiskfs only. */
1760         if (bits & LA_BLOCKS)
1761                 inode->i_blocks = attr->la_blocks;
1762 #endif
1763         if (bits & LA_MODE)
1764                 inode->i_mode = (inode->i_mode & S_IFMT) |
1765                                 (attr->la_mode & ~S_IFMT);
1766         if (bits & LA_UID)
1767                 i_uid_write(inode, attr->la_uid);
1768         if (bits & LA_GID)
1769                 i_gid_write(inode, attr->la_gid);
1770         if (bits & LA_NLINK)
1771                 set_nlink(inode, attr->la_nlink);
1772         if (bits & LA_RDEV)
1773                 inode->i_rdev = attr->la_rdev;
1774
1775         if (bits & LA_FLAGS) {
1776                 /* always keep S_NOCMTIME */
1777                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
1778                                  S_NOCMTIME;
1779         }
1780         return 0;
1781 }
1782
1783 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr)
1784 {
1785         if ((attr->la_valid & LA_UID && attr->la_uid != i_uid_read(inode)) ||
1786             (attr->la_valid & LA_GID && attr->la_gid != i_gid_read(inode))) {
1787                 struct iattr    iattr;
1788                 int             rc;
1789
1790                 ll_vfs_dq_init(inode);
1791                 iattr.ia_valid = 0;
1792                 if (attr->la_valid & LA_UID)
1793                         iattr.ia_valid |= ATTR_UID;
1794                 if (attr->la_valid & LA_GID)
1795                         iattr.ia_valid |= ATTR_GID;
1796                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
1797                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
1798
1799                 rc = ll_vfs_dq_transfer(inode, &iattr);
1800                 if (rc) {
1801                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
1802                                "enforcement enabled on the ldiskfs "
1803                                "filesystem?\n", inode->i_sb->s_id, rc);
1804                         return rc;
1805                 }
1806         }
1807         return 0;
1808 }
1809
1810 static int osd_attr_set(const struct lu_env *env,
1811                         struct dt_object *dt,
1812                         const struct lu_attr *attr,
1813                         struct thandle *handle)
1814 {
1815         struct osd_object *obj = osd_dt_obj(dt);
1816         struct inode      *inode;
1817         int rc;
1818
1819         if (!dt_object_exists(dt))
1820                 return -ENOENT;
1821
1822         LASSERT(handle != NULL);
1823         LASSERT(!dt_object_remote(dt));
1824         LASSERT(osd_invariant(obj));
1825
1826         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
1827
1828         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING)) {
1829                 struct osd_thread_info  *oti  = osd_oti_get(env);
1830                 const struct lu_fid     *fid0 = lu_object_fid(&dt->do_lu);
1831                 struct lu_fid           *fid1 = &oti->oti_fid;
1832                 struct osd_inode_id     *id   = &oti->oti_id;
1833                 struct iam_path_descr   *ipd;
1834                 struct iam_container    *bag;
1835                 struct osd_thandle      *oh;
1836                 int                      rc;
1837
1838                 fid_cpu_to_be(fid1, fid0);
1839                 memset(id, 1, sizeof(*id));
1840                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
1841                                   fid0)->oi_dir.od_container;
1842                 ipd = osd_idx_ipd_get(env, bag);
1843                 if (unlikely(ipd == NULL))
1844                         RETURN(-ENOMEM);
1845
1846                 oh = container_of0(handle, struct osd_thandle, ot_super);
1847                 rc = iam_update(oh->ot_handle, bag, (const struct iam_key *)fid1,
1848                                 (const struct iam_rec *)id, ipd);
1849                 osd_ipd_put(env, bag, ipd);
1850                 return(rc > 0 ? 0 : rc);
1851         }
1852
1853         inode = obj->oo_inode;
1854
1855         rc = osd_quota_transfer(inode, attr);
1856         if (rc)
1857                 return rc;
1858
1859         spin_lock(&obj->oo_guard);
1860         rc = osd_inode_setattr(env, inode, attr);
1861         spin_unlock(&obj->oo_guard);
1862
1863         if (!rc)
1864                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1865
1866         osd_trans_exec_check(env, handle, OSD_OT_ATTR_SET);
1867
1868         return rc;
1869 }
1870
1871 static struct dentry *osd_child_dentry_get(const struct lu_env *env,
1872                                            struct osd_object *obj,
1873                                            const char *name, const int namelen)
1874 {
1875         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
1876 }
1877
1878 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
1879                       umode_t mode, struct dt_allocation_hint *hint,
1880                       struct thandle *th)
1881 {
1882         int result;
1883         struct osd_device  *osd = osd_obj2dev(obj);
1884         struct osd_thandle *oth;
1885         struct dt_object   *parent = NULL;
1886         struct inode       *inode;
1887
1888         LINVRNT(osd_invariant(obj));
1889         LASSERT(obj->oo_inode == NULL);
1890         LASSERT(obj->oo_hl_head == NULL);
1891
1892         if (S_ISDIR(mode) && ldiskfs_pdo) {
1893                 obj->oo_hl_head =ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
1894                 if (obj->oo_hl_head == NULL)
1895                         return -ENOMEM;
1896         }
1897
1898         oth = container_of(th, struct osd_thandle, ot_super);
1899         LASSERT(oth->ot_handle->h_transaction != NULL);
1900
1901         if (hint != NULL && hint->dah_parent != NULL &&
1902             !dt_object_remote(hint->dah_parent))
1903                 parent = hint->dah_parent;
1904
1905         inode = ldiskfs_create_inode(oth->ot_handle,
1906                                      parent ? osd_dt_obj(parent)->oo_inode :
1907                                               osd_sb(osd)->s_root->d_inode,
1908                                      mode);
1909         if (!IS_ERR(inode)) {
1910                 /* Do not update file c/mtime in ldiskfs. */
1911                 inode->i_flags |= S_NOCMTIME;
1912
1913                 /* For new created object, it must be consistent,
1914                  * and it is unnecessary to scrub against it. */
1915                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
1916
1917                 obj->oo_inode = inode;
1918                 result = 0;
1919         } else {
1920                 if (obj->oo_hl_head != NULL) {
1921                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
1922                         obj->oo_hl_head = NULL;
1923                 }
1924                 result = PTR_ERR(inode);
1925         }
1926         LINVRNT(osd_invariant(obj));
1927         return result;
1928 }
1929
1930 enum {
1931         OSD_NAME_LEN = 255
1932 };
1933
1934 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
1935                      struct lu_attr *attr,
1936                      struct dt_allocation_hint *hint,
1937                      struct dt_object_format *dof,
1938                      struct thandle *th)
1939 {
1940         int result;
1941         struct osd_thandle *oth;
1942         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX));
1943
1944         LASSERT(S_ISDIR(attr->la_mode));
1945
1946         oth = container_of(th, struct osd_thandle, ot_super);
1947         LASSERT(oth->ot_handle->h_transaction != NULL);
1948         result = osd_mkfile(info, obj, mode, hint, th);
1949
1950         return result;
1951 }
1952
1953 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
1954                         struct lu_attr *attr,
1955                         struct dt_allocation_hint *hint,
1956                         struct dt_object_format *dof,
1957                         struct thandle *th)
1958 {
1959         int result;
1960         struct osd_thandle *oth;
1961         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
1962
1963         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
1964
1965         LASSERT(S_ISREG(attr->la_mode));
1966
1967         oth = container_of(th, struct osd_thandle, ot_super);
1968         LASSERT(oth->ot_handle->h_transaction != NULL);
1969
1970         result = osd_mkfile(info, obj, mode, hint, th);
1971         if (result == 0) {
1972                 LASSERT(obj->oo_inode != NULL);
1973                 if (feat->dif_flags & DT_IND_VARKEY)
1974                         result = iam_lvar_create(obj->oo_inode,
1975                                                  feat->dif_keysize_max,
1976                                                  feat->dif_ptrsize,
1977                                                  feat->dif_recsize_max,
1978                                                  oth->ot_handle);
1979                 else
1980                         result = iam_lfix_create(obj->oo_inode,
1981                                                  feat->dif_keysize_max,
1982                                                  feat->dif_ptrsize,
1983                                                  feat->dif_recsize_max,
1984                                                  oth->ot_handle);
1985
1986         }
1987         return result;
1988 }
1989
1990 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
1991                      struct lu_attr *attr,
1992                      struct dt_allocation_hint *hint,
1993                      struct dt_object_format *dof,
1994                      struct thandle *th)
1995 {
1996         LASSERT(S_ISREG(attr->la_mode));
1997         return osd_mkfile(info, obj, (attr->la_mode &
1998                                (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
1999 }
2000
2001 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
2002                      struct lu_attr *attr,
2003                      struct dt_allocation_hint *hint,
2004                      struct dt_object_format *dof,
2005                      struct thandle *th)
2006 {
2007         LASSERT(S_ISLNK(attr->la_mode));
2008         return osd_mkfile(info, obj, (attr->la_mode &
2009                               (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2010 }
2011
2012 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
2013                      struct lu_attr *attr,
2014                      struct dt_allocation_hint *hint,
2015                      struct dt_object_format *dof,
2016                      struct thandle *th)
2017 {
2018         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
2019         int result;
2020
2021         LINVRNT(osd_invariant(obj));
2022         LASSERT(obj->oo_inode == NULL);
2023         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
2024                 S_ISFIFO(mode) || S_ISSOCK(mode));
2025
2026         result = osd_mkfile(info, obj, mode, hint, th);
2027         if (result == 0) {
2028                 LASSERT(obj->oo_inode != NULL);
2029                 /*
2030                  * This inode should be marked dirty for i_rdev.  Currently
2031                  * that is done in the osd_attr_init().
2032                  */
2033                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
2034                                    attr->la_rdev);
2035         }
2036         LINVRNT(osd_invariant(obj));
2037         return result;
2038 }
2039
2040 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
2041                               struct lu_attr *,
2042                               struct dt_allocation_hint *hint,
2043                               struct dt_object_format *dof,
2044                               struct thandle *);
2045
2046 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
2047 {
2048         osd_obj_type_f result;
2049
2050         switch (type) {
2051         case DFT_DIR:
2052                 result = osd_mkdir;
2053                 break;
2054         case DFT_REGULAR:
2055                 result = osd_mkreg;
2056                 break;
2057         case DFT_SYM:
2058                 result = osd_mksym;
2059                 break;
2060         case DFT_NODE:
2061                 result = osd_mknod;
2062                 break;
2063         case DFT_INDEX:
2064                 result = osd_mk_index;
2065                 break;
2066
2067         default:
2068                 LBUG();
2069                 break;
2070         }
2071         return result;
2072 }
2073
2074
2075 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
2076                         struct dt_object *parent, struct dt_object *child,
2077                         umode_t child_mode)
2078 {
2079         LASSERT(ah);
2080
2081         ah->dah_parent = parent;
2082         ah->dah_mode = child_mode;
2083 }
2084
2085 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
2086                           struct lu_attr *attr, struct dt_object_format *dof)
2087 {
2088         struct inode   *inode = obj->oo_inode;
2089         __u64           valid = attr->la_valid;
2090         int             result;
2091
2092         attr->la_valid &= ~(LA_TYPE | LA_MODE);
2093
2094         if (dof->dof_type != DFT_NODE)
2095                 attr->la_valid &= ~LA_RDEV;
2096         if ((valid & LA_ATIME) && (attr->la_atime == LTIME_S(inode->i_atime)))
2097                 attr->la_valid &= ~LA_ATIME;
2098         if ((valid & LA_CTIME) && (attr->la_ctime == LTIME_S(inode->i_ctime)))
2099                 attr->la_valid &= ~LA_CTIME;
2100         if ((valid & LA_MTIME) && (attr->la_mtime == LTIME_S(inode->i_mtime)))
2101                 attr->la_valid &= ~LA_MTIME;
2102
2103         result = osd_quota_transfer(inode, attr);
2104         if (result)
2105                 return;
2106
2107         if (attr->la_valid != 0) {
2108                 result = osd_inode_setattr(info->oti_env, inode, attr);
2109                 /*
2110                  * The osd_inode_setattr() should always succeed here.  The
2111                  * only error that could be returned is EDQUOT when we are
2112                  * trying to change the UID or GID of the inode. However, this
2113                  * should not happen since quota enforcement is no longer
2114                  * enabled on ldiskfs (lquota takes care of it).
2115                  */
2116                 LASSERTF(result == 0, "%d\n", result);
2117                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2118         }
2119
2120         attr->la_valid = valid;
2121 }
2122
2123 /**
2124  * Helper function for osd_object_create()
2125  *
2126  * \retval 0, on success
2127  */
2128 static int __osd_object_create(struct osd_thread_info *info,
2129                                struct osd_object *obj, struct lu_attr *attr,
2130                                struct dt_allocation_hint *hint,
2131                                struct dt_object_format *dof,
2132                                struct thandle *th)
2133 {
2134         int     result;
2135         __u32   umask;
2136
2137         osd_trans_exec_op(info->oti_env, th, OSD_OT_CREATE);
2138
2139         /* we drop umask so that permissions we pass are not affected */
2140         umask = current->fs->umask;
2141         current->fs->umask = 0;
2142
2143         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
2144                                                   th);
2145         if (likely(obj->oo_inode != NULL)) {
2146                 LASSERT(obj->oo_inode->i_state & I_NEW);
2147
2148                 /* Unlock the inode before attr initialization to avoid
2149                  * unnecessary dqget operations. LU-6378 */
2150                 unlock_new_inode(obj->oo_inode);
2151         }
2152
2153         if (likely(result == 0)) {
2154                 osd_attr_init(info, obj, attr, dof);
2155                 osd_object_init0(obj);
2156         }
2157
2158         /* restore previous umask value */
2159         current->fs->umask = umask;
2160
2161         osd_trans_exec_check(info->oti_env, th, OSD_OT_CREATE);
2162
2163         return result;
2164 }
2165
2166 /**
2167  * Helper function for osd_object_create()
2168  *
2169  * \retval 0, on success
2170  */
2171 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
2172                            const struct lu_fid *fid, struct thandle *th)
2173 {
2174         struct osd_thread_info *info = osd_oti_get(env);
2175         struct osd_inode_id    *id   = &info->oti_id;
2176         struct osd_device      *osd  = osd_obj2dev(obj);
2177         struct osd_thandle     *oh;
2178         int                     rc;
2179
2180         LASSERT(obj->oo_inode != NULL);
2181
2182         oh = container_of0(th, struct osd_thandle, ot_super);
2183         LASSERT(oh->ot_handle);
2184         osd_trans_exec_op(env, th, OSD_OT_INSERT);
2185
2186         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
2187         rc = osd_oi_insert(info, osd, fid, id, oh->ot_handle, OI_CHECK_FLD);
2188         osd_trans_exec_check(env, th, OSD_OT_INSERT);
2189
2190         return rc;
2191 }
2192
2193 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
2194                    u64 seq, struct lu_seq_range *range)
2195 {
2196         struct seq_server_site  *ss = osd_seq_site(osd);
2197
2198         if (fid_seq_is_idif(seq)) {
2199                 fld_range_set_ost(range);
2200                 range->lsr_index = idif_ost_idx(seq);
2201                 return 0;
2202         }
2203
2204         if (!fid_seq_in_fldb(seq)) {
2205                 fld_range_set_mdt(range);
2206                 if (ss != NULL)
2207                         /* FIXME: If ss is NULL, it suppose not get lsr_index
2208                          * at all */
2209                         range->lsr_index = ss->ss_node_id;
2210                 return 0;
2211         }
2212
2213         LASSERT(ss != NULL);
2214         fld_range_set_any(range);
2215         /* OSD will only do local fld lookup */
2216         return fld_local_lookup(env, ss->ss_server_fld, seq, range);
2217 }
2218
2219 /*
2220  * Concurrency: no external locking is necessary.
2221  */
2222 static int osd_declare_object_create(const struct lu_env *env,
2223                                      struct dt_object *dt,
2224                                      struct lu_attr *attr,
2225                                      struct dt_allocation_hint *hint,
2226                                      struct dt_object_format *dof,
2227                                      struct thandle *handle)
2228 {
2229         struct osd_thandle      *oh;
2230         int                      rc;
2231         ENTRY;
2232
2233         LASSERT(handle != NULL);
2234
2235         oh = container_of0(handle, struct osd_thandle, ot_super);
2236         LASSERT(oh->ot_handle == NULL);
2237
2238         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
2239                              osd_dto_credits_noquota[DTO_OBJECT_CREATE]);
2240         /* Reuse idle OI block may cause additional one OI block
2241          * to be changed. */
2242         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
2243                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
2244
2245         if (!attr)
2246                 RETURN(0);
2247
2248         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid, 1, oh,
2249                                    osd_dt_obj(dt), false, NULL, false);
2250         if (rc != 0)
2251                 RETURN(rc);
2252
2253         RETURN(rc);
2254 }
2255
2256 static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
2257                              struct lu_attr *attr,
2258                              struct dt_allocation_hint *hint,
2259                              struct dt_object_format *dof, struct thandle *th)
2260 {
2261         const struct lu_fid     *fid    = lu_object_fid(&dt->do_lu);
2262         struct osd_object       *obj    = osd_dt_obj(dt);
2263         struct osd_thread_info  *info   = osd_oti_get(env);
2264         int result;
2265         ENTRY;
2266
2267         if (dt_object_exists(dt))
2268                 return -EEXIST;
2269
2270         LINVRNT(osd_invariant(obj));
2271         LASSERT(!dt_object_remote(dt));
2272         LASSERT(osd_write_locked(env, obj));
2273         LASSERT(th != NULL);
2274
2275         if (unlikely(fid_is_acct(fid)))
2276                 /* Quota files can't be created from the kernel any more,
2277                  * 'tune2fs -O quota' will take care of creating them */
2278                 RETURN(-EPERM);
2279
2280         result = __osd_object_create(info, obj, attr, hint, dof, th);
2281         if (result == 0)
2282                 result = __osd_oi_insert(env, obj, fid, th);
2283
2284         LASSERT(ergo(result == 0,
2285                 dt_object_exists(dt) && !dt_object_remote(dt)));
2286
2287         LASSERT(osd_invariant(obj));
2288         RETURN(result);
2289 }
2290
2291 /**
2292  * Called to destroy on-disk representation of the object
2293  *
2294  * Concurrency: must be locked
2295  */
2296 static int osd_declare_object_destroy(const struct lu_env *env,
2297                                       struct dt_object *dt,
2298                                       struct thandle *th)
2299 {
2300         struct osd_object  *obj = osd_dt_obj(dt);
2301         struct inode       *inode = obj->oo_inode;
2302         struct osd_thandle *oh;
2303         int                 rc;
2304         ENTRY;
2305
2306         oh = container_of0(th, struct osd_thandle, ot_super);
2307         LASSERT(oh->ot_handle == NULL);
2308         LASSERT(inode);
2309
2310         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
2311                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
2312         /* Recycle idle OI leaf may cause additional three OI blocks
2313          * to be changed. */
2314         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
2315                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
2316         /* one less inode */
2317         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
2318                                    -1, oh, obj, false, NULL, false);
2319         if (rc)
2320                 RETURN(rc);
2321         /* data to be truncated */
2322         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
2323                                    0, oh, obj, true, NULL, false);
2324         RETURN(rc);
2325 }
2326
2327 static int osd_object_destroy(const struct lu_env *env,
2328                               struct dt_object *dt,
2329                               struct thandle *th)
2330 {
2331         const struct lu_fid    *fid = lu_object_fid(&dt->do_lu);
2332         struct osd_object      *obj = osd_dt_obj(dt);
2333         struct inode           *inode = obj->oo_inode;
2334         struct osd_device      *osd = osd_obj2dev(obj);
2335         struct osd_thandle     *oh;
2336         int                     result;
2337         ENTRY;
2338
2339         oh = container_of0(th, struct osd_thandle, ot_super);
2340         LASSERT(oh->ot_handle);
2341         LASSERT(inode);
2342         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
2343
2344         if (unlikely(fid_is_acct(fid)))
2345                 RETURN(-EPERM);
2346
2347         if (S_ISDIR(inode->i_mode)) {
2348                 LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1 ||
2349                         inode->i_nlink == 2);
2350                 /* it will check/delete the inode from remote parent,
2351                  * how to optimize it? unlink performance impaction XXX */
2352                 result = osd_delete_from_remote_parent(env, osd, obj, oh);
2353                 if (result != 0 && result != -ENOENT) {
2354                         CERROR("%s: delete inode "DFID": rc = %d\n",
2355                                osd_name(osd), PFID(fid), result);
2356                 }
2357                 spin_lock(&obj->oo_guard);
2358                 clear_nlink(inode);
2359                 spin_unlock(&obj->oo_guard);
2360                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2361         }
2362
2363         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
2364
2365         result = osd_oi_delete(osd_oti_get(env), osd, fid, oh->ot_handle,
2366                                OI_CHECK_FLD);
2367
2368         osd_trans_exec_check(env, th, OSD_OT_DESTROY);
2369         /* XXX: add to ext3 orphan list */
2370         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
2371
2372         /* not needed in the cache anymore */
2373         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
2374         obj->oo_destroyed = 1;
2375
2376         RETURN(0);
2377 }
2378
2379 /**
2380  * Put the fid into lustre_mdt_attrs, and then place the structure
2381  * inode's ea. This fid should not be altered during the life time
2382  * of the inode.
2383  *
2384  * \retval +ve, on success
2385  * \retval -ve, on error
2386  *
2387  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
2388  */
2389 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
2390                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
2391 {
2392         struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
2393         int                      rc;
2394         ENTRY;
2395
2396         if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
2397                 RETURN(0);
2398
2399         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_OST_EA_FID_SET))
2400                 rc = -ENOMEM;
2401
2402         lustre_lma_init(lma, fid, compat, incompat);
2403         lustre_lma_swab(lma);
2404
2405         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma, sizeof(*lma),
2406                              XATTR_CREATE);
2407         /* LMA may already exist, but we need to check that all the
2408          * desired compat/incompat flags have been added. */
2409         if (unlikely(rc == -EEXIST)) {
2410                 if (compat == 0 && incompat == 0)
2411                         RETURN(0);
2412
2413                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
2414                                      XATTR_NAME_LMA, info->oti_mdt_attrs_old,
2415                                      LMA_OLD_SIZE);
2416                 if (rc <= 0)
2417                         RETURN(-EINVAL);
2418
2419                 lustre_lma_swab(lma);
2420                 if (!(~lma->lma_compat & compat) &&
2421                     !(~lma->lma_incompat & incompat))
2422                         RETURN(0);
2423
2424                 lma->lma_compat |= compat;
2425                 lma->lma_incompat |= incompat;
2426                 lustre_lma_swab(lma);
2427                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
2428                                      sizeof(*lma), XATTR_REPLACE);
2429         }
2430
2431         RETURN(rc);
2432 }
2433
2434 /**
2435  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
2436  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
2437  * To have compatilibility with 1.8 ldiskfs driver we need to have
2438  * magic number at start of fid data.
2439  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
2440  * its inmemory API.
2441  */
2442 static void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
2443                                          const struct lu_fid *fid)
2444 {
2445         if (!fid_is_namespace_visible(fid) ||
2446             OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
2447                 param->edp_magic = 0;
2448                 return;
2449         }
2450
2451         param->edp_magic = LDISKFS_LUFID_MAGIC;
2452         param->edp_len =  sizeof(struct lu_fid) + 1;
2453         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
2454 }
2455
2456 /**
2457  * Try to read the fid from inode ea into dt_rec.
2458  *
2459  * \param fid object fid.
2460  *
2461  * \retval 0 on success
2462  */
2463 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
2464                           __u32 ino, struct lu_fid *fid,
2465                           struct osd_inode_id *id)
2466 {
2467         struct osd_thread_info *info  = osd_oti_get(env);
2468         struct inode           *inode;
2469         ENTRY;
2470
2471         osd_id_gen(id, ino, OSD_OII_NOGEN);
2472         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
2473         if (IS_ERR(inode))
2474                 RETURN(PTR_ERR(inode));
2475
2476         iput(inode);
2477         RETURN(0);
2478 }
2479
2480 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
2481                                         struct inode *dir,
2482                                         struct inode *parent_dir,
2483                                         const struct lu_fid *dot_fid,
2484                                         const struct lu_fid *dot_dot_fid,
2485                                         struct osd_thandle *oth)
2486 {
2487         struct ldiskfs_dentry_param *dot_ldp;
2488         struct ldiskfs_dentry_param *dot_dot_ldp;
2489
2490         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
2491         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
2492
2493         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
2494         dot_ldp->edp_magic = 0;
2495         return ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
2496                                         dir, dot_ldp, dot_dot_ldp);
2497 }
2498
2499 /**
2500  * Create an local agent inode for remote entry
2501  */
2502 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
2503                                                   struct osd_device *osd,
2504                                                   struct osd_object *pobj,
2505                                                   const struct lu_fid *fid,
2506                                                   __u32 type,
2507                                                   struct thandle *th)
2508 {
2509         struct osd_thread_info  *info = osd_oti_get(env);
2510         struct inode            *local;
2511         struct osd_thandle      *oh;
2512         int                     rc;
2513         ENTRY;
2514
2515         LASSERT(th);
2516         oh = container_of(th, struct osd_thandle, ot_super);
2517         LASSERT(oh->ot_handle->h_transaction != NULL);
2518
2519         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode, type);
2520         if (IS_ERR(local)) {
2521                 CERROR("%s: create local error %d\n", osd_name(osd),
2522                        (int)PTR_ERR(local));
2523                 RETURN(local);
2524         }
2525
2526         ldiskfs_set_inode_state(local, LDISKFS_STATE_LUSTRE_NOSCRUB);
2527         unlock_new_inode(local);
2528
2529         /* Set special LMA flag for local agent inode */
2530         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
2531         if (rc != 0) {
2532                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
2533                        osd_name(osd), PFID(fid), rc);
2534                 RETURN(ERR_PTR(rc));
2535         }
2536
2537         if (!S_ISDIR(type))
2538                 RETURN(local);
2539
2540         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
2541                                          lu_object_fid(&pobj->oo_dt.do_lu),
2542                                          fid, oh);
2543         if (rc != 0) {
2544                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
2545                         osd_name(osd), PFID(fid), rc);
2546                 RETURN(ERR_PTR(rc));
2547         }
2548
2549         RETURN(local);
2550 }
2551
2552 /**
2553  * Delete local agent inode for remote entry
2554  */
2555 static int osd_delete_local_agent_inode(const struct lu_env *env,
2556                                         struct osd_device *osd,
2557                                         const struct lu_fid *fid,
2558                                         __u32 ino, struct osd_thandle *oh)
2559 {
2560         struct osd_thread_info  *oti = osd_oti_get(env);
2561         struct osd_inode_id     *id = &oti->oti_id;
2562         struct inode            *inode;
2563         ENTRY;
2564
2565         id->oii_ino = le32_to_cpu(ino);
2566         id->oii_gen = OSD_OII_NOGEN;
2567         inode = osd_iget(oti, osd, id);
2568         if (IS_ERR(inode)) {
2569                 CERROR("%s: iget error "DFID" id %u:%u\n", osd_name(osd),
2570                        PFID(fid), id->oii_ino, id->oii_gen);
2571                 RETURN(PTR_ERR(inode));
2572         }
2573
2574         clear_nlink(inode);
2575         mark_inode_dirty(inode);
2576         CDEBUG(D_INODE, "%s: delete remote inode "DFID" %lu\n",
2577                 osd_name(osd), PFID(fid), inode->i_ino);
2578         iput(inode);
2579         RETURN(0);
2580 }
2581
2582 /**
2583  * OSD layer object create function for interoperability mode (b11826).
2584  * This is mostly similar to osd_object_create(). Only difference being, fid is
2585  * inserted into inode ea here.
2586  *
2587  * \retval   0, on success
2588  * \retval -ve, on error
2589  */
2590 static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
2591                                 struct lu_attr *attr,
2592                                 struct dt_allocation_hint *hint,
2593                                 struct dt_object_format *dof,
2594                                 struct thandle *th)
2595 {
2596         const struct lu_fid     *fid    = lu_object_fid(&dt->do_lu);
2597         struct osd_object       *obj    = osd_dt_obj(dt);
2598         struct osd_thread_info  *info   = osd_oti_get(env);
2599         int                      result;
2600
2601         ENTRY;
2602
2603         if (dt_object_exists(dt))
2604                 RETURN(-EEXIST);
2605
2606         LASSERT(osd_invariant(obj));
2607         LASSERT(!dt_object_remote(dt));
2608         LASSERT(osd_write_locked(env, obj));
2609         LASSERT(th != NULL);
2610
2611         if (unlikely(fid_is_acct(fid)))
2612                 /* Quota files can't be created from the kernel any more,
2613                  * 'tune2fs -O quota' will take care of creating them */
2614                 RETURN(-EPERM);
2615
2616         result = __osd_object_create(info, obj, attr, hint, dof, th);
2617         if (result == 0) {
2618                 if (fid_is_idif(fid) &&
2619                     !osd_dev(dt->do_lu.lo_dev)->od_index_in_idif) {
2620                         struct lu_fid *tfid = &info->oti_fid;
2621                         struct ost_id *oi   = &info->oti_ostid;
2622
2623                         fid_to_ostid(fid, oi);
2624                         ostid_to_fid(tfid, oi, 0);
2625                         result = osd_ea_fid_set(info, obj->oo_inode, tfid,
2626                                                 LMAC_FID_ON_OST, 0);
2627                 } else {
2628                         result = osd_ea_fid_set(info, obj->oo_inode, fid,
2629                                 fid_is_on_ost(info, osd_obj2dev(obj),
2630                                               fid, OI_CHECK_FLD) ?
2631                                 LMAC_FID_ON_OST : 0, 0);
2632                 }
2633         }
2634
2635         if (result == 0)
2636                 result = __osd_oi_insert(env, obj, fid, th);
2637
2638         LASSERT(ergo(result == 0,
2639                      dt_object_exists(dt) && !dt_object_remote(dt)));
2640         LINVRNT(osd_invariant(obj));
2641         RETURN(result);
2642 }
2643
2644 static int osd_declare_object_ref_add(const struct lu_env *env,
2645                                       struct dt_object *dt,
2646                                       struct thandle *handle)
2647 {
2648         struct osd_thandle       *oh;
2649
2650         /* it's possible that object doesn't exist yet */
2651         LASSERT(handle != NULL);
2652
2653         oh = container_of0(handle, struct osd_thandle, ot_super);
2654         LASSERT(oh->ot_handle == NULL);
2655
2656         osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
2657                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2658
2659         return 0;
2660 }
2661
2662 /*
2663  * Concurrency: @dt is write locked.
2664  */
2665 static int osd_object_ref_add(const struct lu_env *env,
2666                               struct dt_object *dt, struct thandle *th)
2667 {
2668         struct osd_object  *obj = osd_dt_obj(dt);
2669         struct inode       *inode = obj->oo_inode;
2670         struct osd_thandle *oh;
2671         int                 rc = 0;
2672
2673         if (!dt_object_exists(dt))
2674                 return -ENOENT;
2675
2676         LINVRNT(osd_invariant(obj));
2677         LASSERT(!dt_object_remote(dt));
2678         LASSERT(osd_write_locked(env, obj));
2679         LASSERT(th != NULL);
2680
2681         oh = container_of0(th, struct osd_thandle, ot_super);
2682         LASSERT(oh->ot_handle != NULL);
2683
2684         osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
2685
2686         CDEBUG(D_INODE, DFID" increase nlink %d\n",
2687                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
2688         /*
2689          * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
2690          * (65000) subdirectories by storing "1" in i_nlink if the link count
2691          * would otherwise overflow. Directory tranversal tools understand
2692          * that (st_nlink == 1) indicates that the filesystem dose not track
2693          * hard links count on the directory, and will not abort subdirectory
2694          * scanning early once (st_nlink - 2) subdirs have been found.
2695          *
2696          * This also has to properly handle the case of inodes with nlink == 0
2697          * in case they are being linked into the PENDING directory
2698          */
2699         spin_lock(&obj->oo_guard);
2700         if (unlikely(inode->i_nlink == 0))
2701                 /* inc_nlink from 0 may cause WARN_ON */
2702                 set_nlink(inode, 1);
2703         else {
2704                 ldiskfs_inc_count(oh->ot_handle, inode);
2705                 if (!S_ISDIR(inode->i_mode))
2706                         LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
2707         }
2708         spin_unlock(&obj->oo_guard);
2709
2710         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2711         LINVRNT(osd_invariant(obj));
2712
2713         osd_trans_exec_check(env, th, OSD_OT_REF_ADD);
2714
2715         return rc;
2716 }
2717
2718 static int osd_declare_object_ref_del(const struct lu_env *env,
2719                                       struct dt_object *dt,
2720                                       struct thandle *handle)
2721 {
2722         struct osd_thandle *oh;
2723
2724         LASSERT(!dt_object_remote(dt));
2725         LASSERT(handle != NULL);
2726
2727         oh = container_of0(handle, struct osd_thandle, ot_super);
2728         LASSERT(oh->ot_handle == NULL);
2729
2730         osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
2731                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2732
2733         return 0;
2734 }
2735
2736 /*
2737  * Concurrency: @dt is write locked.
2738  */
2739 static int osd_object_ref_del(const struct lu_env *env, struct dt_object *dt,
2740                               struct thandle *th)
2741 {
2742         struct osd_object       *obj = osd_dt_obj(dt);
2743         struct inode            *inode = obj->oo_inode;
2744         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
2745         struct osd_thandle      *oh;
2746
2747         if (!dt_object_exists(dt))
2748                 return -ENOENT;
2749
2750         LINVRNT(osd_invariant(obj));
2751         LASSERT(!dt_object_remote(dt));
2752         LASSERT(osd_write_locked(env, obj));
2753         LASSERT(th != NULL);
2754
2755         oh = container_of0(th, struct osd_thandle, ot_super);
2756         LASSERT(oh->ot_handle != NULL);
2757
2758         osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
2759
2760         spin_lock(&obj->oo_guard);
2761         /* That can be result of upgrade from old Lustre version and
2762          * applied only to local files.  Just skip this ref_del call.
2763          * ext4_unlink() only treats this as a warning, don't LASSERT here.*/
2764         if (inode->i_nlink == 0) {
2765                 CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
2766                              D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
2767                              ", maybe an upgraded file? (LU-3915)\n",
2768                              osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
2769                 spin_unlock(&obj->oo_guard);
2770                 return 0;
2771         }
2772
2773         CDEBUG(D_INODE, DFID" decrease nlink %d\n",
2774                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
2775
2776         ldiskfs_dec_count(oh->ot_handle, inode);
2777         spin_unlock(&obj->oo_guard);
2778
2779         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2780         LINVRNT(osd_invariant(obj));
2781
2782         osd_trans_exec_check(env, th, OSD_OT_REF_DEL);
2783
2784         return 0;
2785 }
2786
2787 /*
2788  * Get the 64-bit version for an inode.
2789  */
2790 static int osd_object_version_get(const struct lu_env *env,
2791                                   struct dt_object *dt, dt_obj_version_t *ver)
2792 {
2793         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2794
2795         CDEBUG(D_INODE, "Get version "LPX64" for inode %lu\n",
2796                LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2797         *ver = LDISKFS_I(inode)->i_fs_version;
2798         return 0;
2799 }
2800
2801 /*
2802  * Concurrency: @dt is read locked.
2803  */
2804 static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
2805                          struct lu_buf *buf, const char *name)
2806 {
2807         struct osd_object      *obj    = osd_dt_obj(dt);
2808         struct inode           *inode  = obj->oo_inode;
2809         struct osd_thread_info *info   = osd_oti_get(env);
2810         struct dentry          *dentry = &info->oti_obj_dentry;
2811
2812         /* version get is not real XATTR but uses xattr API */
2813         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2814                 /* for version we are just using xattr API but change inode
2815                  * field instead */
2816                 if (buf->lb_len == 0)
2817                         return sizeof(dt_obj_version_t);
2818
2819                 if (buf->lb_len < sizeof(dt_obj_version_t))
2820                         return -ERANGE;
2821
2822                 osd_object_version_get(env, dt, buf->lb_buf);
2823
2824                 return sizeof(dt_obj_version_t);
2825         }
2826
2827         if (!dt_object_exists(dt))
2828                 return -ENOENT;
2829
2830         LASSERT(!dt_object_remote(dt));
2831         LASSERT(inode->i_op != NULL);
2832         LASSERT(inode->i_op->getxattr != NULL);
2833
2834         return __osd_xattr_get(inode, dentry, name, buf->lb_buf, buf->lb_len);
2835 }
2836
2837
2838 static int osd_declare_xattr_set(const struct lu_env *env,
2839                                  struct dt_object *dt,
2840                                  const struct lu_buf *buf, const char *name,
2841                                  int fl, struct thandle *handle)
2842 {
2843         struct osd_thandle *oh;
2844         int credits;
2845         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
2846
2847         LASSERT(handle != NULL);
2848
2849         oh = container_of0(handle, struct osd_thandle, ot_super);
2850         LASSERT(oh->ot_handle == NULL);
2851
2852         if (strcmp(name, XATTR_NAME_LMA) == 0) {
2853                 /* For non-upgrading case, the LMA is set first and
2854                  * usually fit inode. But for upgrade case, the LMA
2855                  * may be in another separated EA block. */
2856                 if (!dt_object_exists(dt))
2857                         credits = 0;
2858                 else if (fl == LU_XATTR_REPLACE)
2859                         credits = 1;
2860                 else
2861                         goto upgrade;
2862         } else if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2863                 credits = 1;
2864         } else {
2865 upgrade:
2866                 credits = osd_dto_credits_noquota[DTO_XATTR_SET];
2867                 if (buf && buf->lb_len > sb->s_blocksize) {
2868                         credits *= (buf->lb_len + sb->s_blocksize - 1) >>
2869                                         sb->s_blocksize_bits;
2870                 }
2871                 /*
2872                  * xattr set may involve inode quota change, reserve credits for
2873                  * dquot_initialize()
2874                  */
2875                 credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
2876         }
2877
2878         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET, credits);
2879
2880         return 0;
2881 }
2882
2883 /*
2884  * Set the 64-bit version for object
2885  */
2886 static void osd_object_version_set(const struct lu_env *env,
2887                                    struct dt_object *dt,
2888                                    dt_obj_version_t *new_version)
2889 {
2890         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2891
2892         CDEBUG(D_INODE, "Set version "LPX64" (old "LPX64") for inode %lu\n",
2893                *new_version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2894
2895         LDISKFS_I(inode)->i_fs_version = *new_version;
2896         /** Version is set after all inode operations are finished,
2897          *  so we should mark it dirty here */
2898         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2899 }
2900
2901 /*
2902  * Concurrency: @dt is write locked.
2903  */
2904 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
2905                          const struct lu_buf *buf, const char *name, int fl,
2906                          struct thandle *handle)
2907 {
2908         struct osd_object      *obj      = osd_dt_obj(dt);
2909         struct inode           *inode    = obj->oo_inode;
2910         struct osd_thread_info *info     = osd_oti_get(env);
2911         int                     fs_flags = 0;
2912         int                     rc;
2913         ENTRY;
2914
2915         LASSERT(handle != NULL);
2916
2917         /* version set is not real XATTR */
2918         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2919                 /* for version we are just using xattr API but change inode
2920                  * field instead */
2921                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
2922                 osd_object_version_set(env, dt, buf->lb_buf);
2923                 return sizeof(dt_obj_version_t);
2924         }
2925
2926         CDEBUG(D_INODE, DFID" set xattr '%s' with size %zu\n",
2927                PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
2928
2929         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
2930         if (fl & LU_XATTR_REPLACE)
2931                 fs_flags |= XATTR_REPLACE;
2932
2933         if (fl & LU_XATTR_CREATE)
2934                 fs_flags |= XATTR_CREATE;
2935
2936         if (strcmp(name, XATTR_NAME_LMV) == 0) {
2937                 struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
2938                 int                      rc;
2939
2940                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
2941                 if (rc != 0)
2942                         RETURN(rc);
2943
2944                 lma->lma_incompat |= LMAI_STRIPED;
2945                 lustre_lma_swab(lma);
2946                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
2947                                      sizeof(*lma), XATTR_REPLACE);
2948                 if (rc != 0)
2949                         RETURN(rc);
2950         }
2951
2952         if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LINKEA_OVERFLOW) &&
2953             strcmp(name, XATTR_NAME_LINK) == 0)
2954                 return -ENOSPC;
2955
2956         rc = __osd_xattr_set(info, inode, name, buf->lb_buf, buf->lb_len,
2957                                fs_flags);
2958         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
2959
2960         return rc;
2961 }
2962
2963 /*
2964  * Concurrency: @dt is read locked.
2965  */
2966 static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
2967                           const struct lu_buf *buf)
2968 {
2969         struct osd_object      *obj    = osd_dt_obj(dt);
2970         struct inode           *inode  = obj->oo_inode;
2971         struct osd_thread_info *info   = osd_oti_get(env);
2972         struct dentry          *dentry = &info->oti_obj_dentry;
2973
2974         if (!dt_object_exists(dt))
2975                 return -ENOENT;
2976
2977         LASSERT(!dt_object_remote(dt));
2978         LASSERT(inode->i_op != NULL);
2979         LASSERT(inode->i_op->listxattr != NULL);
2980
2981         dentry->d_inode = inode;
2982         dentry->d_sb = inode->i_sb;
2983         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
2984 }
2985
2986 static int osd_declare_xattr_del(const struct lu_env *env,
2987                                  struct dt_object *dt, const char *name,
2988                                  struct thandle *handle)
2989 {
2990         struct osd_thandle *oh;
2991         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
2992
2993         LASSERT(!dt_object_remote(dt));
2994         LASSERT(handle != NULL);
2995
2996         oh = container_of0(handle, struct osd_thandle, ot_super);
2997         LASSERT(oh->ot_handle == NULL);
2998
2999         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
3000                              osd_dto_credits_noquota[DTO_XATTR_SET]);
3001         /*
3002          * xattr del may involve inode quota change, reserve credits for
3003          * dquot_initialize()
3004          */
3005         oh->ot_credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
3006
3007         return 0;
3008 }
3009
3010 /*
3011  * Concurrency: @dt is write locked.
3012  */
3013 static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
3014                          const char *name, struct thandle *handle)
3015 {
3016         struct osd_object      *obj    = osd_dt_obj(dt);
3017         struct inode           *inode  = obj->oo_inode;
3018         struct osd_thread_info *info   = osd_oti_get(env);
3019         struct dentry          *dentry = &info->oti_obj_dentry;
3020         int                     rc;
3021
3022         if (!dt_object_exists(dt))
3023                 return -ENOENT;
3024
3025         LASSERT(!dt_object_remote(dt));
3026         LASSERT(inode->i_op != NULL);
3027         LASSERT(inode->i_op->removexattr != NULL);
3028         LASSERT(handle != NULL);
3029
3030         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
3031
3032         ll_vfs_dq_init(inode);
3033         dentry->d_inode = inode;
3034         dentry->d_sb = inode->i_sb;
3035         rc = inode->i_op->removexattr(dentry, name);
3036         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
3037         return rc;
3038 }
3039
3040 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt,
3041                            __u64 start, __u64 end)
3042 {
3043         struct osd_object       *obj    = osd_dt_obj(dt);
3044         struct inode            *inode  = obj->oo_inode;
3045         struct osd_thread_info  *info   = osd_oti_get(env);
3046         struct dentry           *dentry = &info->oti_obj_dentry;
3047         struct file             *file   = &info->oti_file;
3048         int                     rc;
3049
3050         ENTRY;
3051
3052         dentry->d_inode = inode;
3053         dentry->d_sb = inode->i_sb;
3054         file->f_path.dentry = dentry;
3055         file->f_mapping = inode->i_mapping;
3056         file->f_op = inode->i_fop;
3057         set_file_inode(file, inode);
3058
3059         rc = ll_vfs_fsync_range(file, start, end, 0);
3060
3061         RETURN(rc);
3062 }
3063
3064 /*
3065  * Index operations.
3066  */
3067
3068 static int osd_iam_index_probe(const struct lu_env *env, struct osd_object *o,
3069                            const struct dt_index_features *feat)
3070 {
3071         struct iam_descr *descr;
3072
3073         if (osd_object_is_root(o))
3074                 return feat == &dt_directory_features;
3075
3076         LASSERT(o->oo_dir != NULL);
3077
3078         descr = o->oo_dir->od_container.ic_descr;
3079         if (feat == &dt_directory_features) {
3080                 if (descr->id_rec_size == sizeof(struct osd_fid_pack))
3081                         return 1;
3082                 else
3083                         return 0;
3084         } else {
3085                 return
3086                         feat->dif_keysize_min <= descr->id_key_size &&
3087                         descr->id_key_size <= feat->dif_keysize_max &&
3088                         feat->dif_recsize_min <= descr->id_rec_size &&
3089                         descr->id_rec_size <= feat->dif_recsize_max &&
3090                         !(feat->dif_flags & (DT_IND_VARKEY |
3091                                              DT_IND_VARREC | DT_IND_NONUNQ)) &&
3092                         ergo(feat->dif_flags & DT_IND_UPDATE,
3093                              1 /* XXX check that object (and file system) is
3094                                 * writable */);
3095         }
3096 }
3097
3098 static int osd_iam_container_init(const struct lu_env *env,
3099                                   struct osd_object *obj,
3100                                   struct osd_directory *dir)
3101 {
3102         struct iam_container *bag = &dir->od_container;
3103         int result;
3104
3105         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
3106         if (result != 0)
3107                 return result;
3108
3109         result = iam_container_setup(bag);
3110         if (result == 0)
3111                 obj->oo_dt.do_index_ops = &osd_index_iam_ops;
3112         else
3113                 iam_container_fini(bag);
3114
3115         return result;
3116 }
3117
3118
3119 /*
3120  * Concurrency: no external locking is necessary.
3121  */
3122 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
3123                          const struct dt_index_features *feat)
3124 {
3125         int                      result;
3126         int                      skip_iam = 0;
3127         struct osd_object       *obj = osd_dt_obj(dt);
3128
3129         LINVRNT(osd_invariant(obj));
3130
3131         if (osd_object_is_root(obj)) {
3132                 dt->do_index_ops = &osd_index_ea_ops;
3133                 result = 0;
3134         } else if (feat == &dt_directory_features) {
3135                 dt->do_index_ops = &osd_index_ea_ops;
3136                 if (obj->oo_inode != NULL && S_ISDIR(obj->oo_inode->i_mode))
3137                         result = 0;
3138                 else
3139                         result = -ENOTDIR;
3140                 skip_iam = 1;
3141         } else if (unlikely(feat == &dt_otable_features)) {
3142                 dt->do_index_ops = &osd_otable_ops;
3143                 return 0;
3144         } else if (unlikely(feat == &dt_acct_features)) {
3145                 dt->do_index_ops = &osd_acct_index_ops;
3146                 result = 0;
3147                 skip_iam = 1;
3148         } else if (!osd_has_index(obj)) {
3149                 struct osd_directory *dir;
3150
3151                 OBD_ALLOC_PTR(dir);
3152                 if (dir != NULL) {
3153
3154                         spin_lock(&obj->oo_guard);
3155                         if (obj->oo_dir == NULL)
3156                                 obj->oo_dir = dir;
3157                         else
3158                                 /*
3159                                  * Concurrent thread allocated container data.
3160                                  */
3161                                 OBD_FREE_PTR(dir);
3162                         spin_unlock(&obj->oo_guard);
3163                         /*
3164                          * Now, that we have container data, serialize its
3165                          * initialization.
3166                          */
3167                         down_write(&obj->oo_ext_idx_sem);
3168                         /*
3169                          * recheck under lock.
3170                          */
3171                         if (!osd_has_index(obj))
3172                                 result = osd_iam_container_init(env, obj,
3173                                                                 obj->oo_dir);
3174                         else
3175                                 result = 0;
3176                         up_write(&obj->oo_ext_idx_sem);
3177                 } else {
3178                         result = -ENOMEM;
3179                 }
3180         } else {
3181                 result = 0;
3182         }
3183
3184         if (result == 0 && skip_iam == 0) {
3185                 if (!osd_iam_index_probe(env, obj, feat))
3186                         result = -ENOTDIR;
3187         }
3188         LINVRNT(osd_invariant(obj));
3189
3190         if (result == 0 && feat == &dt_quota_glb_features &&
3191             fid_seq(lu_object_fid(&dt->do_lu)) == FID_SEQ_QUOTA_GLB)
3192                 result = osd_quota_migration(env, dt);
3193
3194         return result;
3195 }
3196
3197 static int osd_otable_it_attr_get(const struct lu_env *env,
3198                                  struct dt_object *dt,
3199                                  struct lu_attr *attr)
3200 {
3201         attr->la_valid = 0;
3202         return 0;
3203 }
3204
3205 static const struct dt_object_operations osd_obj_ops = {
3206         .do_read_lock         = osd_object_read_lock,
3207         .do_write_lock        = osd_object_write_lock,
3208         .do_read_unlock       = osd_object_read_unlock,
3209         .do_write_unlock      = osd_object_write_unlock,
3210         .do_write_locked      = osd_object_write_locked,
3211         .do_attr_get          = osd_attr_get,
3212         .do_declare_attr_set  = osd_declare_attr_set,
3213         .do_attr_set          = osd_attr_set,
3214         .do_ah_init           = osd_ah_init,
3215         .do_declare_create    = osd_declare_object_create,
3216         .do_create            = osd_object_create,
3217         .do_declare_destroy   = osd_declare_object_destroy,
3218         .do_destroy           = osd_object_destroy,
3219         .do_index_try         = osd_index_try,
3220         .do_declare_ref_add   = osd_declare_object_ref_add,
3221         .do_ref_add           = osd_object_ref_add,
3222         .do_declare_ref_del   = osd_declare_object_ref_del,
3223         .do_ref_del           = osd_object_ref_del,
3224         .do_xattr_get         = osd_xattr_get,
3225         .do_declare_xattr_set = osd_declare_xattr_set,
3226         .do_xattr_set         = osd_xattr_set,
3227         .do_declare_xattr_del = osd_declare_xattr_del,
3228         .do_xattr_del         = osd_xattr_del,
3229         .do_xattr_list        = osd_xattr_list,
3230         .do_object_sync       = osd_object_sync,
3231 };
3232
3233 /**
3234  * dt_object_operations for interoperability mode
3235  * (i.e. to run 2.0 mds on 1.8 disk) (b11826)
3236  */
3237 static const struct dt_object_operations osd_obj_ea_ops = {
3238         .do_read_lock         = osd_object_read_lock,
3239         .do_write_lock        = osd_object_write_lock,
3240         .do_read_unlock       = osd_object_read_unlock,
3241         .do_write_unlock      = osd_object_write_unlock,
3242         .do_write_locked      = osd_object_write_locked,
3243         .do_attr_get          = osd_attr_get,
3244         .do_declare_attr_set  = osd_declare_attr_set,
3245         .do_attr_set          = osd_attr_set,
3246         .do_ah_init           = osd_ah_init,
3247         .do_declare_create    = osd_declare_object_create,
3248         .do_create            = osd_object_ea_create,
3249         .do_declare_destroy   = osd_declare_object_destroy,
3250         .do_destroy           = osd_object_destroy,
3251         .do_index_try         = osd_index_try,
3252         .do_declare_ref_add   = osd_declare_object_ref_add,
3253         .do_ref_add           = osd_object_ref_add,
3254         .do_declare_ref_del   = osd_declare_object_ref_del,
3255         .do_ref_del           = osd_object_ref_del,
3256         .do_xattr_get         = osd_xattr_get,
3257         .do_declare_xattr_set = osd_declare_xattr_set,
3258         .do_xattr_set         = osd_xattr_set,
3259         .do_declare_xattr_del = osd_declare_xattr_del,
3260         .do_xattr_del         = osd_xattr_del,
3261         .do_xattr_list        = osd_xattr_list,
3262         .do_object_sync       = osd_object_sync,
3263 };
3264
3265 static const struct dt_object_operations osd_obj_otable_it_ops = {
3266         .do_attr_get    = osd_otable_it_attr_get,
3267         .do_index_try   = osd_index_try,
3268 };
3269
3270 static int osd_index_declare_iam_delete(const struct lu_env *env,
3271                                         struct dt_object *dt,
3272                                         const struct dt_key *key,
3273                                         struct thandle *handle)
3274 {
3275         struct osd_thandle    *oh;
3276
3277         oh = container_of0(handle, struct osd_thandle, ot_super);
3278         LASSERT(oh->ot_handle == NULL);
3279
3280         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3281                              osd_dto_credits_noquota[DTO_INDEX_DELETE]);
3282
3283         return 0;
3284 }
3285
3286 /**
3287  *      delete a (key, value) pair from index \a dt specified by \a key
3288  *
3289  *      \param  dt      osd index object
3290  *      \param  key     key for index
3291  *      \param  rec     record reference
3292  *      \param  handle  transaction handler
3293  *
3294  *      \retval  0  success
3295  *      \retval -ve   failure
3296  */
3297 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
3298                                 const struct dt_key *key,
3299                                 struct thandle *handle)
3300 {
3301         struct osd_thread_info *oti = osd_oti_get(env);
3302         struct osd_object      *obj = osd_dt_obj(dt);
3303         struct osd_thandle     *oh;
3304         struct iam_path_descr  *ipd;
3305         struct iam_container   *bag = &obj->oo_dir->od_container;
3306         int                     rc;
3307         ENTRY;
3308
3309         if (!dt_object_exists(dt))
3310                 RETURN(-ENOENT);
3311
3312         LINVRNT(osd_invariant(obj));
3313         LASSERT(!dt_object_remote(dt));
3314         LASSERT(bag->ic_object == obj->oo_inode);
3315         LASSERT(handle != NULL);
3316
3317         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
3318
3319         ipd = osd_idx_ipd_get(env, bag);
3320         if (unlikely(ipd == NULL))
3321                 RETURN(-ENOMEM);
3322
3323         oh = container_of0(handle, struct osd_thandle, ot_super);
3324         LASSERT(oh->ot_handle != NULL);
3325         LASSERT(oh->ot_handle->h_transaction != NULL);
3326
3327         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
3328                 /* swab quota uid/gid provided by caller */
3329                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
3330                 key = (const struct dt_key *)&oti->oti_quota_id;
3331         }
3332
3333         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
3334         osd_ipd_put(env, bag, ipd);
3335         LINVRNT(osd_invariant(obj));
3336         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
3337         RETURN(rc);
3338 }
3339
3340 static int osd_index_declare_ea_delete(const struct lu_env *env,
3341                                        struct dt_object *dt,
3342                                        const struct dt_key *key,
3343                                        struct thandle *handle)
3344 {
3345         struct osd_thandle *oh;
3346         struct inode       *inode;
3347         int                 rc;
3348         ENTRY;
3349
3350         LASSERT(!dt_object_remote(dt));
3351         LASSERT(handle != NULL);
3352
3353         oh = container_of0(handle, struct osd_thandle, ot_super);
3354         LASSERT(oh->ot_handle == NULL);
3355
3356         /* due to DNE we may need to remove an agent inode */
3357         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3358                              osd_dto_credits_noquota[DTO_INDEX_DELETE] +
3359                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
3360
3361         inode = osd_dt_obj(dt)->oo_inode;
3362         LASSERT(inode);
3363
3364         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3365                                    0, oh, osd_dt_obj(dt), true, NULL, false);
3366         RETURN(rc);
3367 }
3368
3369 static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
3370                                           struct dt_rec *fid)
3371 {
3372         struct osd_fid_pack *rec;
3373         int                  rc = -ENODATA;
3374
3375         if (de->file_type & LDISKFS_DIRENT_LUFID) {
3376                 rec = (struct osd_fid_pack *) (de->name + de->name_len + 1);
3377                 rc = osd_fid_unpack((struct lu_fid *)fid, rec);
3378                 if (rc == 0 && unlikely(!fid_is_sane((struct lu_fid *)fid)))
3379                         rc = -EINVAL;
3380         }
3381         return rc;
3382 }
3383
3384 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
3385                           const struct lu_fid *fid)
3386 {
3387         struct seq_server_site  *ss = osd_seq_site(osd);
3388         ENTRY;
3389
3390         /* FID seqs not in FLDB, must be local seq */
3391         if (unlikely(!fid_seq_in_fldb(fid_seq(fid))))
3392                 RETURN(0);
3393
3394         /* If FLD is not being initialized yet, it only happens during the
3395          * initialization, likely during mgs initialization, and we assume
3396          * this is local FID. */
3397         if (ss == NULL || ss->ss_server_fld == NULL)
3398                 RETURN(0);
3399
3400         /* Only check the local FLDB here */
3401         if (osd_seq_exists(env, osd, fid_seq(fid)))
3402                 RETURN(0);
3403
3404         RETURN(1);
3405 }
3406
3407 /**
3408  * Index delete function for interoperability mode (b11826).
3409  * It will remove the directory entry added by osd_index_ea_insert().
3410  * This entry is needed to maintain name->fid mapping.
3411  *
3412  * \param key,  key i.e. file entry to be deleted
3413  *
3414  * \retval   0, on success
3415  * \retval -ve, on error
3416  */
3417 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
3418                                const struct dt_key *key, struct thandle *handle)
3419 {
3420         struct osd_object          *obj = osd_dt_obj(dt);
3421         struct inode               *dir = obj->oo_inode;
3422         struct dentry              *dentry;
3423         struct osd_thandle         *oh;
3424         struct ldiskfs_dir_entry_2 *de = NULL;
3425         struct buffer_head         *bh;
3426         struct htree_lock          *hlock = NULL;
3427         struct lu_fid              *fid = &osd_oti_get(env)->oti_fid;
3428         struct osd_device          *osd = osd_dev(dt->do_lu.lo_dev);
3429         int                        rc;
3430         ENTRY;
3431
3432         if (!dt_object_exists(dt))
3433                 RETURN(-ENOENT);
3434
3435         LINVRNT(osd_invariant(obj));
3436         LASSERT(!dt_object_remote(dt));
3437         LASSERT(handle != NULL);
3438
3439         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
3440
3441         oh = container_of(handle, struct osd_thandle, ot_super);
3442         LASSERT(oh->ot_handle != NULL);
3443         LASSERT(oh->ot_handle->h_transaction != NULL);
3444
3445         ll_vfs_dq_init(dir);
3446         dentry = osd_child_dentry_get(env, obj,
3447                                       (char *)key, strlen((char *)key));
3448
3449         if (obj->oo_hl_head != NULL) {
3450                 hlock = osd_oti_get(env)->oti_hlock;
3451                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
3452                                    dir, LDISKFS_HLOCK_DEL);
3453         } else {
3454                 down_write(&obj->oo_ext_idx_sem);
3455         }
3456
3457         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
3458         if (bh) {
3459                 __u32 ino = 0;
3460
3461                 /* If this is not the ".." entry, it might be a remote DNE
3462                  * entry and  we need to check if the FID is for a remote
3463                  * MDT.  If the FID is  not in the directory entry (e.g.
3464                  * upgraded 1.8 filesystem without dirdata enabled) then
3465                  * we need to get the FID from the LMA. For a remote directory
3466                  * there HAS to be an LMA, it cannot be an IGIF inode in this
3467                  * case.
3468                  *
3469                  * Delete the entry before the agent inode in order to
3470                  * simplify error handling.  At worst an error after deleting
3471                  * the entry first might leak the agent inode afterward. The
3472                  * reverse would need filesystem abort in case of error deleting
3473                  * the entry after the agent had been removed, or leave a
3474                  * dangling entry pointing at a random inode. */
3475                 if (strcmp((char *)key, dotdot) != 0) {
3476                         LASSERT(de != NULL);
3477                         rc = osd_get_fid_from_dentry(de, (struct dt_rec *)fid);
3478                         /* If Fid is not in dentry, try to get it from LMA */
3479                         if (rc == -ENODATA) {
3480                                 struct osd_inode_id *id;
3481                                 struct inode *inode;
3482
3483                                 /* Before trying to get fid from the inode,
3484                                  * check whether the inode is valid.
3485                                  *
3486                                  * If the inode has been deleted, do not go
3487                                  * ahead to do osd_ea_fid_get, which will set
3488                                  * the inode to bad inode, which might cause
3489                                  * the inode to be deleted uncorrectly */
3490                                 inode = ldiskfs_iget(osd_sb(osd),
3491                                                      le32_to_cpu(de->inode));
3492                                 if (IS_ERR(inode)) {
3493                                         CDEBUG(D_INODE, "%s: "DFID"get inode"
3494                                                "error.\n", osd_name(osd),
3495                                                PFID(fid));
3496                                         rc = PTR_ERR(inode);
3497                                 } else {
3498                                         if (likely(inode->i_nlink != 0)) {
3499                                                 id = &osd_oti_get(env)->oti_id;
3500                                                 rc = osd_ea_fid_get(env, obj,
3501                                                         le32_to_cpu(de->inode),
3502                                                                     fid, id);
3503                                         } else {
3504                                                 CDEBUG(D_INFO, "%s: %u "DFID
3505                                                        "deleted.\n",
3506                                                        osd_name(osd),
3507                                                        le32_to_cpu(de->inode),
3508                                                        PFID(fid));
3509                                                 rc = -ESTALE;
3510                                         }
3511                                         iput(inode);
3512                                 }
3513                         }
3514                         if (rc == 0 &&
3515                             unlikely(osd_remote_fid(env, osd, fid)))
3516                                 /* Need to delete agent inode */
3517                                 ino = le32_to_cpu(de->inode);
3518                 }
3519                 rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
3520                 brelse(bh);
3521                 if (rc == 0 && unlikely(ino != 0)) {
3522                         rc = osd_delete_local_agent_inode(env, osd, fid, ino,
3523                                                           oh);
3524                         if (rc != 0)
3525                                 CERROR("%s: del local inode "DFID": rc = %d\n",
3526                                        osd_name(osd), PFID(fid), rc);
3527                 }
3528         } else {
3529                 rc = -ENOENT;
3530         }
3531         if (hlock != NULL)
3532                 ldiskfs_htree_unlock(hlock);
3533         else
3534                 up_write(&obj->oo_ext_idx_sem);
3535
3536         if (rc != 0)
3537                 GOTO(out, rc);
3538
3539         /* For inode on the remote MDT, .. will point to
3540          * /Agent directory, Check whether it needs to delete
3541          * from agent directory */
3542         if (unlikely(strcmp((char *)key, dotdot) == 0)) {
3543                 rc = osd_delete_from_remote_parent(env, osd_obj2dev(obj), obj,
3544                                                    oh);
3545                 if (rc != 0 && rc != -ENOENT) {
3546                         CERROR("%s: delete agent inode "DFID": rc = %d\n",
3547                                osd_name(osd), PFID(fid), rc);
3548                 }
3549
3550                 if (rc == -ENOENT)
3551                         rc = 0;
3552
3553                 GOTO(out, rc);
3554         }
3555 out:
3556
3557         LASSERT(osd_invariant(obj));
3558         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
3559         RETURN(rc);
3560 }
3561
3562 /**
3563  *      Lookup index for \a key and copy record to \a rec.
3564  *
3565  *      \param  dt      osd index object
3566  *      \param  key     key for index
3567  *      \param  rec     record reference
3568  *
3569  *      \retval  +ve  success : exact mach
3570  *      \retval  0    return record with key not greater than \a key
3571  *      \retval -ve   failure
3572  */
3573 static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
3574                                 struct dt_rec *rec, const struct dt_key *key)
3575 {
3576         struct osd_object      *obj = osd_dt_obj(dt);
3577         struct iam_path_descr  *ipd;
3578         struct iam_container   *bag = &obj->oo_dir->od_container;
3579         struct osd_thread_info *oti = osd_oti_get(env);
3580         struct iam_iterator    *it = &oti->oti_idx_it;
3581         struct iam_rec         *iam_rec;
3582         int                     rc;
3583         ENTRY;
3584
3585         if (!dt_object_exists(dt))
3586                 RETURN(-ENOENT);
3587
3588         LASSERT(osd_invariant(obj));
3589         LASSERT(!dt_object_remote(dt));
3590         LASSERT(bag->ic_object == obj->oo_inode);
3591
3592         ipd = osd_idx_ipd_get(env, bag);
3593         if (IS_ERR(ipd))
3594                 RETURN(-ENOMEM);
3595
3596         /* got ipd now we can start iterator. */
3597         iam_it_init(it, bag, 0, ipd);
3598
3599         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
3600                 /* swab quota uid/gid provided by caller */
3601                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
3602                 key = (const struct dt_key *)&oti->oti_quota_id;
3603         }
3604
3605         rc = iam_it_get(it, (struct iam_key *)key);
3606         if (rc >= 0) {
3607                 if (S_ISDIR(obj->oo_inode->i_mode))
3608                         iam_rec = (struct iam_rec *)oti->oti_ldp;
3609                 else
3610                         iam_rec = (struct iam_rec *) rec;
3611
3612                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)iam_rec);
3613
3614                 if (S_ISDIR(obj->oo_inode->i_mode))
3615                         osd_fid_unpack((struct lu_fid *) rec,
3616                                        (struct osd_fid_pack *)iam_rec);
3617                 else if (fid_is_quota(lu_object_fid(&dt->do_lu)))
3618                         osd_quota_unpack(obj, rec);
3619         }
3620
3621         iam_it_put(it);
3622         iam_it_fini(it);
3623         osd_ipd_put(env, bag, ipd);
3624
3625         LINVRNT(osd_invariant(obj));
3626
3627         RETURN(rc);
3628 }
3629
3630 static int osd_index_declare_iam_insert(const struct lu_env *env,
3631                                         struct dt_object *dt,
3632                                         const struct dt_rec *rec,
3633                                         const struct dt_key *key,
3634                                         struct thandle *handle)
3635 {
3636         struct osd_thandle *oh;
3637
3638         LASSERT(handle != NULL);
3639
3640         oh = container_of0(handle, struct osd_thandle, ot_super);
3641         LASSERT(oh->ot_handle == NULL);
3642
3643         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3644                              osd_dto_credits_noquota[DTO_INDEX_INSERT]);
3645
3646         return 0;
3647 }
3648
3649 /**
3650  *      Inserts (key, value) pair in \a dt index object.
3651  *
3652  *      \param  dt      osd index object
3653  *      \param  key     key for index
3654  *      \param  rec     record reference
3655  *      \param  th      transaction handler
3656  *
3657  *      \retval  0  success
3658  *      \retval -ve failure
3659  */
3660 static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
3661                                 const struct dt_rec *rec,
3662                                 const struct dt_key *key, struct thandle *th,
3663                                 int ignore_quota)
3664 {
3665         struct osd_object     *obj = osd_dt_obj(dt);
3666         struct iam_path_descr *ipd;
3667         struct osd_thandle    *oh;
3668         struct iam_container  *bag;
3669         struct osd_thread_info *oti = osd_oti_get(env);
3670         struct iam_rec         *iam_rec;
3671         int                     rc;
3672         ENTRY;
3673
3674         if (!dt_object_exists(dt))
3675                 RETURN(-ENOENT);
3676
3677         LINVRNT(osd_invariant(obj));
3678         LASSERT(!dt_object_remote(dt));
3679
3680         bag = &obj->oo_dir->od_container;
3681         LASSERT(bag->ic_object == obj->oo_inode);
3682         LASSERT(th != NULL);
3683
3684         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3685
3686         ipd = osd_idx_ipd_get(env, bag);
3687         if (unlikely(ipd == NULL))
3688                 RETURN(-ENOMEM);
3689
3690         oh = container_of0(th, struct osd_thandle, ot_super);
3691         LASSERT(oh->ot_handle != NULL);
3692         LASSERT(oh->ot_handle->h_transaction != NULL);
3693         if (S_ISDIR(obj->oo_inode->i_mode)) {
3694                 iam_rec = (struct iam_rec *)oti->oti_ldp;
3695                 osd_fid_pack((struct osd_fid_pack *)iam_rec, rec, &oti->oti_fid);
3696         } else if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
3697                 /* pack quota uid/gid */
3698                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
3699                 key = (const struct dt_key *)&oti->oti_quota_id;
3700                 /* pack quota record */
3701                 rec = osd_quota_pack(obj, rec, &oti->oti_quota_rec);
3702                 iam_rec = (struct iam_rec *)rec;
3703         } else {
3704                 iam_rec = (struct iam_rec *)rec;
3705         }
3706
3707         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
3708                         iam_rec, ipd);
3709         osd_ipd_put(env, bag, ipd);
3710         LINVRNT(osd_invariant(obj));
3711         osd_trans_exec_check(env, th, OSD_OT_INSERT);
3712         RETURN(rc);
3713 }
3714
3715 /**
3716  * Calls ldiskfs_add_entry() to add directory entry
3717  * into the directory. This is required for
3718  * interoperability mode (b11826)
3719  *
3720  * \retval   0, on success
3721  * \retval -ve, on error
3722  */
3723 static int __osd_ea_add_rec(struct osd_thread_info *info,
3724                             struct osd_object *pobj, struct inode  *cinode,
3725                             const char *name, const struct lu_fid *fid,
3726                             struct htree_lock *hlock, struct thandle *th)
3727 {
3728         struct ldiskfs_dentry_param *ldp;
3729         struct dentry               *child;
3730         struct osd_thandle          *oth;
3731         int                          rc;
3732
3733         oth = container_of(th, struct osd_thandle, ot_super);
3734         LASSERT(oth->ot_handle != NULL);
3735         LASSERT(oth->ot_handle->h_transaction != NULL);
3736         LASSERT(pobj->oo_inode);
3737
3738         ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
3739         if (unlikely(pobj->oo_inode ==
3740                      osd_sb(osd_obj2dev(pobj))->s_root->d_inode))
3741                 ldp->edp_magic = 0;
3742         else
3743                 osd_get_ldiskfs_dirent_param(ldp, fid);
3744         child = osd_child_dentry_get(info->oti_env, pobj, name, strlen(name));
3745         child->d_fsdata = (void *)ldp;
3746         ll_vfs_dq_init(pobj->oo_inode);
3747         rc = osd_ldiskfs_add_entry(oth->ot_handle, child, cinode, hlock);
3748         if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_TYPE)) {
3749                 struct ldiskfs_dir_entry_2      *de;
3750                 struct buffer_head              *bh;
3751                 int                              rc1;
3752
3753                 bh = osd_ldiskfs_find_entry(pobj->oo_inode, &child->d_name, &de,
3754                                             NULL, hlock);
3755                 if (bh != NULL) {
3756                         rc1 = ldiskfs_journal_get_write_access(oth->ot_handle,
3757                                                                bh);
3758                         if (rc1 == 0) {
3759                                 if (S_ISDIR(cinode->i_mode))
3760                                         de->file_type = LDISKFS_DIRENT_LUFID |
3761                                                         LDISKFS_FT_REG_FILE;
3762                                 else
3763                                         de->file_type = LDISKFS_DIRENT_LUFID |
3764                                                         LDISKFS_FT_DIR;
3765                                 ldiskfs_handle_dirty_metadata(oth->ot_handle,
3766                                                               NULL, bh);
3767                                 brelse(bh);
3768                         }
3769                 }
3770         }
3771
3772         RETURN(rc);
3773 }
3774
3775 /**
3776  * Calls ldiskfs_add_dot_dotdot() to add dot and dotdot entries
3777  * into the directory.Also sets flags into osd object to
3778  * indicate dot and dotdot are created. This is required for
3779  * interoperability mode (b11826)
3780  *
3781  * \param dir   directory for dot and dotdot fixup.
3782  * \param obj   child object for linking
3783  *
3784  * \retval   0, on success
3785  * \retval -ve, on error
3786  */
3787 static int osd_add_dot_dotdot(struct osd_thread_info *info,
3788                               struct osd_object *dir,
3789                               struct inode *parent_dir, const char *name,
3790                               const struct lu_fid *dot_fid,
3791                               const struct lu_fid *dot_dot_fid,
3792                               struct thandle *th)
3793 {
3794         struct inode                *inode = dir->oo_inode;
3795         struct osd_thandle          *oth;
3796         int result = 0;
3797
3798         oth = container_of(th, struct osd_thandle, ot_super);
3799         LASSERT(oth->ot_handle->h_transaction != NULL);
3800         LASSERT(S_ISDIR(dir->oo_inode->i_mode));
3801
3802         if (strcmp(name, dot) == 0) {
3803                 if (dir->oo_compat_dot_created) {
3804                         result = -EEXIST;
3805                 } else {
3806                         LASSERT(inode == parent_dir);
3807                         dir->oo_compat_dot_created = 1;
3808                         result = 0;
3809                 }
3810         } else if (strcmp(name, dotdot) == 0) {
3811                 if (!dir->oo_compat_dot_created)
3812                         return -EINVAL;
3813                 /* in case of rename, dotdot is already created */
3814                 if (dir->oo_compat_dotdot_created) {
3815                         return __osd_ea_add_rec(info, dir, parent_dir, name,
3816                                                 dot_dot_fid, NULL, th);
3817                 }
3818
3819                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PARENT)) {
3820                         struct lu_fid tfid = *dot_dot_fid;
3821
3822                         tfid.f_oid--;
3823                         result = osd_add_dot_dotdot_internal(info,
3824                                         dir->oo_inode, parent_dir, dot_fid,
3825                                         &tfid, oth);
3826                 } else {
3827                         result = osd_add_dot_dotdot_internal(info,
3828                                         dir->oo_inode, parent_dir, dot_fid,
3829                                         dot_dot_fid, oth);
3830                 }
3831
3832                 if (result == 0)
3833                         dir->oo_compat_dotdot_created = 1;
3834         }
3835
3836         /* ldiskfs_init_new_dir() doesn't call ldiskfs_mark_inode_dirty()
3837          * this seem as an optimization as usually it's called
3838          * later to refresh mtime of the parent. Lustre does not
3839          * update mtime in few cases (e.g. PENDING, .lustre)
3840          * we still need to transfer i_size/etc to the buffer cache */
3841         ldiskfs_mark_inode_dirty(oth->ot_handle, dir->oo_inode);
3842
3843         return result;
3844 }
3845
3846
3847 /**
3848  * It will call the appropriate osd_add* function and return the
3849  * value, return by respective functions.
3850  */
3851 static int osd_ea_add_rec(const struct lu_env *env, struct osd_object *pobj,
3852                           struct inode *cinode, const char *name,
3853                           const struct lu_fid *fid, struct thandle *th)
3854 {
3855         struct osd_thread_info *info   = osd_oti_get(env);
3856         struct htree_lock      *hlock;
3857         int                     rc;
3858
3859         hlock = pobj->oo_hl_head != NULL ? info->oti_hlock : NULL;
3860
3861         if (name[0] == '.' && (name[1] == '\0' || (name[1] == '.' &&
3862                                                    name[2] =='\0'))) {
3863                 if (hlock != NULL) {
3864                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
3865                                            pobj->oo_inode, 0);
3866                 } else {
3867                         down_write(&pobj->oo_ext_idx_sem);
3868                 }
3869
3870                 rc = osd_add_dot_dotdot(info, pobj, cinode, name,
3871                                         lu_object_fid(&pobj->oo_dt.do_lu),
3872                                         fid, th);
3873         } else {
3874                 if (hlock != NULL) {
3875                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
3876                                            pobj->oo_inode, LDISKFS_HLOCK_ADD);
3877                 } else {
3878                         down_write(&pobj->oo_ext_idx_sem);
3879                 }
3880
3881                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_INDIR)) {
3882                         struct lu_fid *tfid = &info->oti_fid;
3883
3884                         *tfid = *fid;
3885                         tfid->f_ver = ~0;
3886                         rc = __osd_ea_add_rec(info, pobj, cinode, name,
3887                                               tfid, hlock, th);
3888                 } else {
3889                         rc = __osd_ea_add_rec(info, pobj, cinode, name, fid,
3890                                               hlock, th);
3891                 }
3892         }
3893         if (hlock != NULL)
3894                 ldiskfs_htree_unlock(hlock);
3895         else
3896                 up_write(&pobj->oo_ext_idx_sem);
3897
3898         return rc;
3899 }
3900
3901 static void
3902 osd_consistency_check(struct osd_thread_info *oti, struct osd_device *dev,
3903                       struct osd_idmap_cache *oic)
3904 {
3905         struct osd_scrub    *scrub = &dev->od_scrub;
3906         struct lu_fid       *fid   = &oic->oic_fid;
3907         struct osd_inode_id *id    = &oti->oti_id;
3908         int                  once  = 0;
3909         int                  rc;
3910         ENTRY;
3911
3912         if (!fid_is_norm(fid) && !fid_is_igif(fid))
3913                 RETURN_EXIT;
3914
3915         if (scrub->os_pos_current > id->oii_ino)
3916                 RETURN_EXIT;
3917
3918 again:
3919         rc = osd_oi_lookup(oti, dev, fid, id, OI_CHECK_FLD);
3920         if (rc != 0 && rc != -ENOENT)
3921                 RETURN_EXIT;
3922
3923         if (rc == 0 && osd_id_eq(id, &oic->oic_lid))
3924                 RETURN_EXIT;
3925
3926         if (thread_is_running(&scrub->os_thread)) {
3927                 rc = osd_oii_insert(dev, oic, rc == -ENOENT);
3928                 /* There is race condition between osd_oi_lookup and OI scrub.
3929                  * The OI scrub finished just after osd_oi_lookup() failure.
3930                  * Under such case, it is unnecessary to trigger OI scrub again,
3931                  * but try to call osd_oi_lookup() again. */
3932                 if (unlikely(rc == -EAGAIN))
3933                         goto again;
3934
3935                 RETURN_EXIT;
3936         }
3937
3938         if (!dev->od_noscrub && ++once == 1) {
3939                 rc = osd_scrub_start(dev, SS_AUTO_PARTIAL | SS_CLEAR_DRYRUN |
3940                                      SS_CLEAR_FAILOUT);
3941                 CDEBUG(D_LFSCK | D_CONSOLE, "%.16s: trigger OI scrub by RPC "
3942                        "for "DFID", rc = %d [2]\n",
3943                        LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
3944                        PFID(fid), rc);
3945                 if (rc == 0 || rc == -EALREADY)
3946                         goto again;
3947         }
3948
3949         EXIT;
3950 }
3951
3952 static int osd_fail_fid_lookup(struct osd_thread_info *oti,
3953                                struct osd_device *dev,
3954                                struct osd_idmap_cache *oic,
3955                                struct lu_fid *fid, __u32 ino)
3956 {
3957         struct lustre_mdt_attrs *lma   = &oti->oti_mdt_attrs;
3958         struct inode            *inode;
3959         int                      rc;
3960
3961         osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
3962         inode = osd_iget(oti, dev, &oic->oic_lid);
3963         if (IS_ERR(inode)) {
3964                 fid_zero(&oic->oic_fid);
3965                 return PTR_ERR(inode);
3966         }
3967
3968         rc = osd_get_lma(oti, inode, &oti->oti_obj_dentry, lma);
3969         iput(inode);
3970         if (rc != 0)
3971                 fid_zero(&oic->oic_fid);
3972         else
3973                 *fid = oic->oic_fid = lma->lma_self_fid;
3974         return rc;
3975 }
3976
3977 void osd_add_oi_cache(struct osd_thread_info *info, struct osd_device *osd,
3978                       struct osd_inode_id *id, const struct lu_fid *fid)
3979 {
3980         CDEBUG(D_INODE, "add "DFID" %u:%u to info %p\n", PFID(fid),
3981                id->oii_ino, id->oii_gen, info);
3982         info->oti_cache.oic_lid = *id;
3983         info->oti_cache.oic_fid = *fid;
3984         info->oti_cache.oic_dev = osd;
3985 }
3986
3987 /**
3988  * Get parent FID from the linkEA.
3989  *
3990  * For a directory which parent resides on remote MDT, to satisfy the
3991  * local e2fsck, we insert it into the /REMOTE_PARENT_DIR locally. On
3992  * the other hand, to make the lookup(..) on the directory can return
3993  * the real parent FID, we append the real parent FID after its ".."
3994  * name entry in the /REMOTE_PARENT_DIR.
3995  *
3996  * Unfortunately, such PFID-in-dirent cannot be preserved via file-level
3997  * backup. So after the restore, we cannot get the right parent FID from
3998  * its ".." name entry in the /REMOTE_PARENT_DIR. Under such case, since
3999  * we have stored the real parent FID in the directory object's linkEA,
4000  * we can parse the linkEA for the real parent FID.
4001  *
4002  * \param[in] env       pointer to the thread context
4003  * \param[in] obj       pointer to the object to be handled
4004  * \param[out]fid       pointer to the buffer to hold the parent FID
4005  *
4006  * \retval              0 for getting the real parent FID successfully
4007  * \retval              negative error number on failure
4008  */
4009 static int osd_get_pfid_from_linkea(const struct lu_env *env,
4010                                     struct osd_object *obj,
4011                                     struct lu_fid *fid)
4012 {
4013         struct osd_thread_info  *oti    = osd_oti_get(env);
4014         struct lu_buf           *buf    = &oti->oti_big_buf;
4015         struct dentry           *dentry = &oti->oti_obj_dentry;
4016         struct inode            *inode  = obj->oo_inode;
4017         struct linkea_data       ldata  = { NULL };
4018         int                      rc;
4019         ENTRY;
4020
4021         fid_zero(fid);
4022         if (!S_ISDIR(inode->i_mode))
4023                 RETURN(-EIO);
4024
4025 again:
4026         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
4027                              buf->lb_buf, buf->lb_len);
4028         if (rc == -ERANGE) {
4029                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
4030                                      NULL, 0);
4031                 if (rc > 0) {
4032                         lu_buf_realloc(buf, rc);
4033                         if (buf->lb_buf == NULL)
4034                                 RETURN(-ENOMEM);
4035
4036                         goto again;
4037                 }
4038         }
4039
4040         if (unlikely(rc == 0))
4041                 RETURN(-ENODATA);
4042
4043         if (rc < 0)
4044                 RETURN(rc);
4045
4046         if (unlikely(buf->lb_buf == NULL)) {
4047                 lu_buf_realloc(buf, rc);
4048                 if (buf->lb_buf == NULL)
4049                         RETURN(-ENOMEM);
4050
4051                 goto again;
4052         }
4053
4054         ldata.ld_buf = buf;
4055         rc = linkea_init(&ldata);
4056         if (rc == 0) {
4057                 linkea_first_entry(&ldata);
4058                 linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, NULL, fid);
4059         }
4060
4061         RETURN(rc);
4062 }
4063
4064 /**
4065  * Calls ->lookup() to find dentry. From dentry get inode and
4066  * read inode's ea to get fid. This is required for  interoperability
4067  * mode (b11826)
4068  *
4069  * \retval   0, on success
4070  * \retval -ve, on error
4071  */
4072 static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
4073                              struct dt_rec *rec, const struct dt_key *key)
4074 {
4075         struct inode                    *dir    = obj->oo_inode;
4076         struct dentry                   *dentry;
4077         struct ldiskfs_dir_entry_2      *de;
4078         struct buffer_head              *bh;
4079         struct lu_fid                   *fid = (struct lu_fid *) rec;
4080         struct htree_lock               *hlock = NULL;
4081         int                             ino;
4082         int                             rc;
4083         ENTRY;
4084
4085         LASSERT(dir->i_op != NULL);
4086         LASSERT(dir->i_op->lookup != NULL);
4087
4088         dentry = osd_child_dentry_get(env, obj,
4089                                       (char *)key, strlen((char *)key));
4090
4091         if (obj->oo_hl_head != NULL) {
4092                 hlock = osd_oti_get(env)->oti_hlock;
4093                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
4094                                    dir, LDISKFS_HLOCK_LOOKUP);
4095         } else {
4096                 down_read(&obj->oo_ext_idx_sem);
4097         }
4098
4099         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
4100         if (bh) {
4101                 struct osd_thread_info *oti = osd_oti_get(env);
4102                 struct osd_inode_id *id = &oti->oti_id;
4103                 struct osd_idmap_cache *oic = &oti->oti_cache;
4104                 struct osd_device *dev = osd_obj2dev(obj);
4105
4106                 ino = le32_to_cpu(de->inode);
4107                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP)) {
4108                         brelse(bh);
4109                         rc = osd_fail_fid_lookup(oti, dev, oic, fid, ino);
4110                         GOTO(out, rc);
4111                 }
4112
4113                 rc = osd_get_fid_from_dentry(de, rec);
4114
4115                 /* done with de, release bh */
4116                 brelse(bh);
4117                 if (rc != 0) {
4118                         if (unlikely(ino == osd_remote_parent_ino(dev))) {
4119                                 const char *name = (const char *)key;
4120
4121                                 /* If the parent is on remote MDT, and there
4122                                  * is no FID-in-dirent, then we have to get
4123                                  * the parent FID from the linkEA.  */
4124                                 if (likely(strlen(name) == 2 &&
4125                                            name[0] == '.' && name[1] == '.'))
4126                                         rc = osd_get_pfid_from_linkea(env, obj,
4127                                                                       fid);
4128                         } else {
4129                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
4130                         }
4131                 } else {
4132                         osd_id_gen(id, ino, OSD_OII_NOGEN);
4133                 }
4134
4135                 if (rc != 0) {
4136                         fid_zero(&oic->oic_fid);
4137                         GOTO(out, rc);
4138                 }
4139
4140                 if (osd_remote_fid(env, dev, fid))
4141                         GOTO(out, rc = 0);
4142
4143                 osd_add_oi_cache(osd_oti_get(env), osd_obj2dev(obj), id, fid);
4144                 osd_consistency_check(oti, dev, oic);
4145         } else {
4146                 rc = -ENOENT;
4147         }
4148
4149         GOTO(out, rc);
4150
4151 out:
4152         if (hlock != NULL)
4153                 ldiskfs_htree_unlock(hlock);
4154         else
4155                 up_read(&obj->oo_ext_idx_sem);
4156         return rc;
4157 }
4158
4159 /**
4160  * Find the osd object for given fid.
4161  *
4162  * \param fid need to find the osd object having this fid
4163  *
4164  * \retval osd_object on success
4165  * \retval        -ve on error
4166  */
4167 static struct osd_object *osd_object_find(const struct lu_env *env,
4168                                           struct dt_object *dt,
4169                                           const struct lu_fid *fid)
4170 {
4171         struct lu_device  *ludev = dt->do_lu.lo_dev;
4172         struct osd_object *child = NULL;
4173         struct lu_object  *luch;
4174         struct lu_object  *lo;
4175
4176         /*
4177          * at this point topdev might not exist yet
4178          * (i.e. MGS is preparing profiles). so we can
4179          * not rely on topdev and instead lookup with
4180          * our device passed as topdev. this can't work
4181          * if the object isn't cached yet (as osd doesn't
4182          * allocate lu_header). IOW, the object must be
4183          * in the cache, otherwise lu_object_alloc() crashes
4184          * -bzzz
4185          */
4186         luch = lu_object_find_at(env, ludev->ld_site->ls_top_dev == NULL ?
4187                                  ludev : ludev->ld_site->ls_top_dev,
4188                                  fid, NULL);
4189         if (!IS_ERR(luch)) {
4190                 if (lu_object_exists(luch)) {
4191                         lo = lu_object_locate(luch->lo_header, ludev->ld_type);
4192                         if (lo != NULL)
4193                                 child = osd_obj(lo);
4194                         else
4195                                 LU_OBJECT_DEBUG(D_ERROR, env, luch,
4196                                                 "lu_object can't be located"
4197                                                 DFID"\n", PFID(fid));
4198
4199                         if (child == NULL) {
4200                                 lu_object_put(env, luch);
4201                                 CERROR("Unable to get osd_object\n");
4202                                 child = ERR_PTR(-ENOENT);
4203                         }
4204                 } else {
4205                         LU_OBJECT_DEBUG(D_ERROR, env, luch,
4206                                         "lu_object does not exists "DFID"\n",
4207                                         PFID(fid));
4208                         lu_object_put(env, luch);
4209                         child = ERR_PTR(-ENOENT);
4210                 }
4211         } else {
4212                 child = ERR_CAST(luch);
4213         }
4214
4215         return child;
4216 }
4217
4218 /**
4219  * Put the osd object once done with it.
4220  *
4221  * \param obj osd object that needs to be put
4222  */
4223 static inline void osd_object_put(const struct lu_env *env,
4224                                   struct osd_object *obj)
4225 {
4226         lu_object_put(env, &obj->oo_dt.do_lu);
4227 }
4228
4229 static int osd_index_declare_ea_insert(const struct lu_env *env,
4230                                        struct dt_object *dt,
4231                                        const struct dt_rec *rec,
4232                                        const struct dt_key *key,
4233                                        struct thandle *handle)
4234 {
4235         struct osd_thandle      *oh;
4236         struct osd_device       *osd   = osd_dev(dt->do_lu.lo_dev);
4237         struct lu_fid           *fid = (struct lu_fid *)rec;
4238         int                      credits, rc = 0;
4239         ENTRY;
4240
4241         LASSERT(!dt_object_remote(dt));
4242         LASSERT(handle != NULL);
4243
4244         oh = container_of0(handle, struct osd_thandle, ot_super);
4245         LASSERT(oh->ot_handle == NULL);
4246
4247         credits = osd_dto_credits_noquota[DTO_INDEX_INSERT];
4248         if (fid != NULL) {
4249                 rc = osd_remote_fid(env, osd, fid);
4250                 if (unlikely(rc < 0))
4251                         RETURN(rc);
4252                 if (rc > 0) {
4253                         /* a reference to remote inode is represented by an
4254                          * agent inode which we have to create */
4255                         credits += osd_dto_credits_noquota[DTO_OBJECT_CREATE];
4256                         credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
4257                 }
4258                 rc = 0;
4259         }
4260
4261         osd_trans_declare_op(env, oh, OSD_OT_INSERT, credits);
4262
4263         if (osd_dt_obj(dt)->oo_inode != NULL) {
4264                 struct inode *inode = osd_dt_obj(dt)->oo_inode;
4265
4266                 /* We ignore block quota on meta pool (MDTs), so needn't
4267                  * calculate how many blocks will be consumed by this index
4268                  * insert */
4269                 rc = osd_declare_inode_qid(env, i_uid_read(inode),
4270                                            i_gid_read(inode), 0, oh,
4271                                            osd_dt_obj(dt), true, NULL, false);
4272         }
4273
4274         RETURN(rc);
4275 }
4276
4277 /**
4278  * Index add function for interoperability mode (b11826).
4279  * It will add the directory entry.This entry is needed to
4280  * maintain name->fid mapping.
4281  *
4282  * \param key it is key i.e. file entry to be inserted
4283  * \param rec it is value of given key i.e. fid
4284  *
4285  * \retval   0, on success
4286  * \retval -ve, on error
4287  */
4288 static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
4289                                const struct dt_rec *rec,
4290                                const struct dt_key *key, struct thandle *th,
4291                                int ignore_quota)
4292 {
4293         struct osd_object       *obj = osd_dt_obj(dt);
4294         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
4295         struct dt_insert_rec    *rec1   = (struct dt_insert_rec *)rec;
4296         const struct lu_fid     *fid    = rec1->rec_fid;
4297         const char              *name = (const char *)key;
4298         struct osd_thread_info  *oti   = osd_oti_get(env);
4299         struct osd_inode_id     *id    = &oti->oti_id;
4300         struct inode            *child_inode = NULL;
4301         struct osd_object       *child = NULL;
4302         int                     rc;
4303         ENTRY;
4304
4305         if (!dt_object_exists(dt))
4306                 RETURN(-ENOENT);
4307
4308         LASSERT(osd_invariant(obj));
4309         LASSERT(!dt_object_remote(dt));
4310         LASSERT(th != NULL);
4311
4312         osd_trans_exec_op(env, th, OSD_OT_INSERT);
4313
4314         LASSERTF(fid_is_sane(fid), "fid"DFID" is insane!\n", PFID(fid));
4315
4316         rc = osd_remote_fid(env, osd, fid);
4317         if (rc < 0) {
4318                 CERROR("%s: Can not find object "DFID" rc %d\n",
4319                        osd_name(osd), PFID(fid), rc);
4320                 RETURN(rc);
4321         }
4322
4323         if (rc == 1) {
4324                 /* Insert remote entry */
4325                 if (strcmp(name, dotdot) == 0 && strlen(name) == 2) {
4326                         struct osd_mdobj_map    *omm = osd->od_mdt_map;
4327                         struct osd_thandle      *oh;
4328
4329                         /* If parent on remote MDT, we need put this object
4330                          * under AGENT */
4331                         oh = container_of(th, typeof(*oh), ot_super);
4332                         rc = osd_add_to_remote_parent(env, osd, obj, oh);
4333                         if (rc != 0) {
4334                                 CERROR("%s: add "DFID" error: rc = %d\n",
4335                                        osd_name(osd),
4336                                        PFID(lu_object_fid(&dt->do_lu)), rc);
4337                                 RETURN(rc);
4338                         }
4339
4340                         child_inode = igrab(omm->omm_remote_parent->d_inode);
4341                 } else {
4342                         child_inode = osd_create_local_agent_inode(env, osd,
4343                                         obj, fid, rec1->rec_type & S_IFMT, th);
4344                         if (IS_ERR(child_inode))
4345                                 RETURN(PTR_ERR(child_inode));
4346                 }
4347         } else {
4348                 /* Insert local entry */
4349                 child = osd_object_find(env, dt, fid);
4350                 if (IS_ERR(child)) {
4351                         CERROR("%s: Can not find object "DFID"%u:%u: rc = %d\n",
4352                                osd_name(osd), PFID(fid),
4353                                id->oii_ino, id->oii_gen,
4354                                (int)PTR_ERR(child));
4355                         RETURN(PTR_ERR(child));
4356                 }
4357                 child_inode = igrab(child->oo_inode);
4358         }
4359
4360         rc = osd_ea_add_rec(env, obj, child_inode, name, fid, th);
4361
4362         CDEBUG(D_INODE, "parent %lu insert %s:%lu rc = %d\n",
4363                obj->oo_inode->i_ino, name, child_inode->i_ino, rc);
4364
4365         iput(child_inode);
4366         if (child != NULL)
4367                 osd_object_put(env, child);
4368         LASSERT(osd_invariant(obj));
4369         osd_trans_exec_check(env, th, OSD_OT_INSERT);
4370         RETURN(rc);
4371 }
4372
4373 /**
4374  *  Initialize osd Iterator for given osd index object.
4375  *
4376  *  \param  dt      osd index object
4377  */
4378
4379 static struct dt_it *osd_it_iam_init(const struct lu_env *env,
4380                                      struct dt_object *dt,
4381                                      __u32 unused)
4382 {
4383         struct osd_it_iam      *it;
4384         struct osd_object      *obj = osd_dt_obj(dt);
4385         struct lu_object       *lo  = &dt->do_lu;
4386         struct iam_path_descr  *ipd;
4387         struct iam_container   *bag = &obj->oo_dir->od_container;
4388
4389         if (!dt_object_exists(dt))
4390                 return ERR_PTR(-ENOENT);
4391
4392         OBD_ALLOC_PTR(it);
4393         if (it == NULL)
4394                 return ERR_PTR(-ENOMEM);
4395
4396         ipd = osd_it_ipd_get(env, bag);
4397         if (likely(ipd != NULL)) {
4398                 it->oi_obj = obj;
4399                 it->oi_ipd = ipd;
4400                 lu_object_get(lo);
4401                 iam_it_init(&it->oi_it, bag, IAM_IT_MOVE, ipd);
4402                 return (struct dt_it *)it;
4403         } else {
4404                 OBD_FREE_PTR(it);
4405                 return ERR_PTR(-ENOMEM);
4406         }
4407 }
4408
4409 /**
4410  * free given Iterator.
4411  */
4412
4413 static void osd_it_iam_fini(const struct lu_env *env, struct dt_it *di)
4414 {
4415         struct osd_it_iam       *it  = (struct osd_it_iam *)di;
4416         struct osd_object       *obj = it->oi_obj;
4417
4418         iam_it_fini(&it->oi_it);
4419         osd_ipd_put(env, &obj->oo_dir->od_container, it->oi_ipd);
4420         lu_object_put(env, &obj->oo_dt.do_lu);
4421         OBD_FREE_PTR(it);
4422 }
4423
4424 /**
4425  *  Move Iterator to record specified by \a key
4426  *
4427  *  \param  di      osd iterator
4428  *  \param  key     key for index
4429  *
4430  *  \retval +ve  di points to record with least key not larger than key
4431  *  \retval  0   di points to exact matched key
4432  *  \retval -ve  failure
4433  */
4434
4435 static int osd_it_iam_get(const struct lu_env *env,
4436                           struct dt_it *di, const struct dt_key *key)
4437 {
4438         struct osd_thread_info  *oti = osd_oti_get(env);
4439         struct osd_it_iam       *it = (struct osd_it_iam *)di;
4440
4441         if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
4442                 /* swab quota uid/gid */
4443                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
4444                 key = (struct dt_key *)&oti->oti_quota_id;
4445         }
4446
4447         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
4448 }
4449
4450 /**
4451  *  Release Iterator
4452  *
4453  *  \param  di      osd iterator
4454  */
4455 static void osd_it_iam_put(const struct lu_env *env, struct dt_it *di)
4456 {
4457         struct osd_it_iam *it = (struct osd_it_iam *)di;
4458
4459         iam_it_put(&it->oi_it);
4460 }
4461
4462 /**
4463  *  Move iterator by one record
4464  *
4465  *  \param  di      osd iterator
4466  *
4467  *  \retval +1   end of container reached
4468  *  \retval  0   success
4469  *  \retval -ve  failure
4470  */
4471
4472 static int osd_it_iam_next(const struct lu_env *env, struct dt_it *di)
4473 {
4474         struct osd_it_iam *it = (struct osd_it_iam *)di;
4475
4476         return iam_it_next(&it->oi_it);
4477 }
4478
4479 /**
4480  * Return pointer to the key under iterator.
4481  */
4482
4483 static struct dt_key *osd_it_iam_key(const struct lu_env *env,
4484                                  const struct dt_it *di)
4485 {
4486         struct osd_thread_info *oti = osd_oti_get(env);
4487         struct osd_it_iam      *it = (struct osd_it_iam *)di;
4488         struct osd_object      *obj = it->oi_obj;
4489         struct dt_key          *key;
4490
4491         key = (struct dt_key *)iam_it_key_get(&it->oi_it);
4492
4493         if (!IS_ERR(key) && fid_is_quota(lu_object_fid(&obj->oo_dt.do_lu))) {
4494                 /* swab quota uid/gid */
4495                 oti->oti_quota_id = le64_to_cpu(*((__u64 *)key));
4496                 key = (struct dt_key *)&oti->oti_quota_id;
4497         }
4498
4499         return key;
4500 }
4501
4502 /**
4503  * Return size of key under iterator (in bytes)
4504  */
4505
4506 static int osd_it_iam_key_size(const struct lu_env *env, const struct dt_it *di)
4507 {
4508         struct osd_it_iam *it = (struct osd_it_iam *)di;
4509
4510         return iam_it_key_size(&it->oi_it);
4511 }
4512
4513 static inline void
4514 osd_it_append_attrs(struct lu_dirent *ent, int len, __u16 type)
4515 {
4516         /* check if file type is required */
4517         if (ent->lde_attrs & LUDA_TYPE) {
4518                 struct luda_type *lt;
4519                 int align = sizeof(*lt) - 1;
4520
4521                 len = (len + align) & ~align;
4522                 lt = (struct luda_type *)(ent->lde_name + len);
4523                 lt->lt_type = cpu_to_le16(DTTOIF(type));
4524         }
4525
4526         ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
4527 }
4528
4529 /**
4530  * build lu direct from backend fs dirent.
4531  */
4532
4533 static inline void
4534 osd_it_pack_dirent(struct lu_dirent *ent, struct lu_fid *fid, __u64 offset,
4535                    char *name, __u16 namelen, __u16 type, __u32 attr)
4536 {
4537         ent->lde_attrs = attr | LUDA_FID;
4538         fid_cpu_to_le(&ent->lde_fid, fid);
4539
4540         ent->lde_hash = cpu_to_le64(offset);
4541         ent->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
4542
4543         strncpy(ent->lde_name, name, namelen);
4544         ent->lde_name[namelen] = '\0';
4545         ent->lde_namelen = cpu_to_le16(namelen);
4546
4547         /* append lustre attributes */
4548         osd_it_append_attrs(ent, namelen, type);
4549 }
4550
4551 /**
4552  * Return pointer to the record under iterator.
4553  */
4554 static int osd_it_iam_rec(const struct lu_env *env,
4555                           const struct dt_it *di,
4556                           struct dt_rec *dtrec, __u32 attr)
4557 {
4558         struct osd_it_iam      *it   = (struct osd_it_iam *)di;
4559         struct osd_thread_info *info = osd_oti_get(env);
4560         ENTRY;
4561
4562         if (S_ISDIR(it->oi_obj->oo_inode->i_mode)) {
4563                 const struct osd_fid_pack *rec;
4564                 struct lu_fid             *fid = &info->oti_fid;
4565                 struct lu_dirent          *lde = (struct lu_dirent *)dtrec;
4566                 char                      *name;
4567                 int                        namelen;
4568                 __u64                      hash;
4569                 int                        rc;
4570
4571                 name = (char *)iam_it_key_get(&it->oi_it);
4572                 if (IS_ERR(name))
4573                         RETURN(PTR_ERR(name));
4574
4575                 namelen = iam_it_key_size(&it->oi_it);
4576
4577                 rec = (const struct osd_fid_pack *)iam_it_rec_get(&it->oi_it);
4578                 if (IS_ERR(rec))
4579                         RETURN(PTR_ERR(rec));
4580
4581                 rc = osd_fid_unpack(fid, rec);
4582                 if (rc)
4583                         RETURN(rc);
4584
4585                 hash = iam_it_store(&it->oi_it);
4586
4587                 /* IAM does not store object type in IAM index (dir) */
4588                 osd_it_pack_dirent(lde, fid, hash, name, namelen,
4589                                    0, LUDA_FID);
4590         } else if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
4591                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
4592                            (struct iam_rec *)dtrec);
4593                 osd_quota_unpack(it->oi_obj, dtrec);
4594         } else {
4595                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
4596                            (struct iam_rec *)dtrec);
4597         }
4598
4599         RETURN(0);
4600 }
4601
4602 /**
4603  * Returns cookie for current Iterator position.
4604  */
4605 static __u64 osd_it_iam_store(const struct lu_env *env, const struct dt_it *di)
4606 {
4607         struct osd_it_iam *it = (struct osd_it_iam *)di;
4608
4609         return iam_it_store(&it->oi_it);
4610 }
4611
4612 /**
4613  * Restore iterator from cookie.
4614  *
4615  * \param  di      osd iterator
4616  * \param  hash    Iterator location cookie
4617  *
4618  * \retval +ve  di points to record with least key not larger than key.
4619  * \retval  0   di points to exact matched key
4620  * \retval -ve  failure
4621  */
4622
4623 static int osd_it_iam_load(const struct lu_env *env,
4624                            const struct dt_it *di, __u64 hash)
4625 {
4626         struct osd_it_iam *it = (struct osd_it_iam *)di;
4627
4628         return iam_it_load(&it->oi_it, hash);
4629 }
4630
4631 static const struct dt_index_operations osd_index_iam_ops = {
4632         .dio_lookup         = osd_index_iam_lookup,
4633         .dio_declare_insert = osd_index_declare_iam_insert,
4634         .dio_insert         = osd_index_iam_insert,
4635         .dio_declare_delete = osd_index_declare_iam_delete,
4636         .dio_delete         = osd_index_iam_delete,
4637         .dio_it     = {
4638                 .init     = osd_it_iam_init,
4639                 .fini     = osd_it_iam_fini,
4640                 .get      = osd_it_iam_get,
4641                 .put      = osd_it_iam_put,
4642                 .next     = osd_it_iam_next,
4643                 .key      = osd_it_iam_key,
4644                 .key_size = osd_it_iam_key_size,
4645                 .rec      = osd_it_iam_rec,
4646                 .store    = osd_it_iam_store,
4647                 .load     = osd_it_iam_load
4648         }
4649 };
4650
4651
4652 /**
4653  * Creates or initializes iterator context.
4654  *
4655  * \retval struct osd_it_ea, iterator structure on success
4656  *
4657  */
4658 static struct dt_it *osd_it_ea_init(const struct lu_env *env,
4659                                     struct dt_object *dt,
4660                                     __u32 attr)
4661 {
4662         struct osd_object       *obj  = osd_dt_obj(dt);
4663         struct osd_thread_info  *info = osd_oti_get(env);
4664         struct osd_it_ea        *oie;
4665         struct file             *file;
4666         struct lu_object        *lo   = &dt->do_lu;
4667         struct dentry           *obj_dentry;
4668         ENTRY;
4669
4670         if (!dt_object_exists(dt) || obj->oo_destroyed)
4671                 RETURN(ERR_PTR(-ENOENT));
4672
4673         OBD_SLAB_ALLOC_PTR_GFP(oie, osd_itea_cachep, GFP_NOFS);
4674         if (oie == NULL)
4675                 RETURN(ERR_PTR(-ENOMEM));
4676         obj_dentry = &oie->oie_dentry;
4677
4678         obj_dentry->d_inode = obj->oo_inode;
4679         obj_dentry->d_sb = osd_sb(osd_obj2dev(obj));
4680         obj_dentry->d_name.hash = 0;
4681
4682         oie->oie_rd_dirent       = 0;
4683         oie->oie_it_dirent       = 0;
4684         oie->oie_dirent          = NULL;
4685         if (unlikely(!info->oti_it_ea_buf_used)) {
4686                 oie->oie_buf = info->oti_it_ea_buf;
4687                 info->oti_it_ea_buf_used = 1;
4688         } else {
4689                 OBD_ALLOC(oie->oie_buf, OSD_IT_EA_BUFSIZE);
4690                 if (oie->oie_buf == NULL)
4691                         RETURN(ERR_PTR(-ENOMEM));
4692         }
4693         oie->oie_obj             = obj;
4694
4695         file = &oie->oie_file;
4696
4697         /* Only FMODE_64BITHASH or FMODE_32BITHASH should be set, NOT both. */
4698         if (attr & LUDA_64BITHASH)
4699                 file->f_mode    = FMODE_64BITHASH;
4700         else
4701                 file->f_mode    = FMODE_32BITHASH;
4702         file->f_path.dentry     = obj_dentry;
4703         file->f_mapping         = obj->oo_inode->i_mapping;
4704         file->f_op              = obj->oo_inode->i_fop;
4705         set_file_inode(file, obj->oo_inode);
4706
4707         lu_object_get(lo);
4708         RETURN((struct dt_it *) oie);
4709 }
4710
4711 /**
4712  * Destroy or finishes iterator context.
4713  *
4714  * \param di iterator structure to be destroyed
4715  */
4716 static void osd_it_ea_fini(const struct lu_env *env, struct dt_it *di)
4717 {
4718         struct osd_thread_info  *info = osd_oti_get(env);
4719         struct osd_it_ea        *oie    = (struct osd_it_ea *)di;
4720         struct osd_object       *obj    = oie->oie_obj;
4721         struct inode            *inode  = obj->oo_inode;
4722
4723         ENTRY;
4724         oie->oie_file.f_op->release(inode, &oie->oie_file);
4725         lu_object_put(env, &obj->oo_dt.do_lu);
4726         if (unlikely(oie->oie_buf != info->oti_it_ea_buf))
4727                 OBD_FREE(oie->oie_buf, OSD_IT_EA_BUFSIZE);
4728         else
4729                 info->oti_it_ea_buf_used = 0;
4730         OBD_SLAB_FREE_PTR(oie, osd_itea_cachep);
4731         EXIT;
4732 }
4733
4734 /**
4735  * It position the iterator at given key, so that next lookup continues from
4736  * that key Or it is similar to dio_it->load() but based on a key,
4737  * rather than file position.
4738  *
4739  * As a special convention, osd_it_ea_get(env, di, "") has to rewind iterator
4740  * to the beginning.
4741  *
4742  * TODO: Presently return +1 considering it is only used by mdd_dir_is_empty().
4743  */
4744 static int osd_it_ea_get(const struct lu_env *env,
4745                          struct dt_it *di, const struct dt_key *key)
4746 {
4747         struct osd_it_ea     *it   = (struct osd_it_ea *)di;
4748
4749         ENTRY;
4750         LASSERT(((const char *)key)[0] == '\0');
4751         it->oie_file.f_pos      = 0;
4752         it->oie_rd_dirent       = 0;
4753         it->oie_it_dirent       = 0;
4754         it->oie_dirent          = NULL;
4755
4756         RETURN(+1);
4757 }
4758
4759 /**
4760  * Does nothing
4761  */
4762 static void osd_it_ea_put(const struct lu_env *env, struct dt_it *di)
4763 {
4764 }
4765
4766 struct osd_filldir_cbs {
4767 #ifdef HAVE_DIR_CONTEXT
4768         struct dir_context ctx;
4769 #endif
4770         struct osd_it_ea  *it;
4771 };
4772 /**
4773  * It is called internally by ->readdir(). It fills the
4774  * iterator's in-memory data structure with required
4775  * information i.e. name, namelen, rec_size etc.
4776  *
4777  * \param buf in which information to be filled in.
4778  * \param name name of the file in given dir
4779  *
4780  * \retval 0 on success
4781  * \retval 1 on buffer full
4782  */
4783 static int osd_ldiskfs_filldir(void *buf, const char *name, int namelen,
4784                                loff_t offset, __u64 ino,
4785                                unsigned d_type)
4786 {
4787         struct osd_it_ea        *it   = ((struct osd_filldir_cbs *)buf)->it;
4788         struct osd_object       *obj  = it->oie_obj;
4789         struct osd_it_ea_dirent *ent  = it->oie_dirent;
4790         struct lu_fid           *fid  = &ent->oied_fid;
4791         struct osd_fid_pack     *rec;
4792         ENTRY;
4793
4794         /* this should never happen */
4795         if (unlikely(namelen == 0 || namelen > LDISKFS_NAME_LEN)) {
4796                 CERROR("ldiskfs return invalid namelen %d\n", namelen);
4797                 RETURN(-EIO);
4798         }
4799
4800         if ((void *) ent - it->oie_buf + sizeof(*ent) + namelen >
4801             OSD_IT_EA_BUFSIZE)
4802                 RETURN(1);
4803
4804         /* "." is just the object itself. */
4805         if (namelen == 1 && name[0] == '.') {
4806                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
4807         } else if (d_type & LDISKFS_DIRENT_LUFID) {
4808                 rec = (struct osd_fid_pack*) (name + namelen + 1);
4809                 if (osd_fid_unpack(fid, rec) != 0)
4810                         fid_zero(fid);
4811         } else {
4812                 fid_zero(fid);
4813         }
4814         d_type &= ~LDISKFS_DIRENT_LUFID;
4815
4816         /* NOT export local root. */
4817         if (unlikely(osd_sb(osd_obj2dev(obj))->s_root->d_inode->i_ino == ino)) {
4818                 ino = obj->oo_inode->i_ino;
4819                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
4820         }
4821
4822         ent->oied_ino     = ino;
4823         ent->oied_off     = offset;
4824         ent->oied_namelen = namelen;
4825         ent->oied_type    = d_type;
4826
4827         memcpy(ent->oied_name, name, namelen);
4828
4829         it->oie_rd_dirent++;
4830         it->oie_dirent = (void *) ent + cfs_size_round(sizeof(*ent) + namelen);
4831         RETURN(0);
4832 }
4833
4834 /**
4835  * Calls ->readdir() to load a directory entry at a time
4836  * and stored it in iterator's in-memory data structure.
4837  *
4838  * \param di iterator's in memory structure
4839  *
4840  * \retval   0 on success
4841  * \retval -ve on error
4842  * \retval +1 reach the end of entry
4843  */
4844 static int osd_ldiskfs_it_fill(const struct lu_env *env,
4845                                const struct dt_it *di)
4846 {
4847         struct osd_it_ea   *it    = (struct osd_it_ea *)di;
4848         struct osd_object  *obj   = it->oie_obj;
4849         struct inode       *inode = obj->oo_inode;
4850         struct htree_lock  *hlock = NULL;
4851         struct file        *filp  = &it->oie_file;
4852         int                 rc = 0;
4853         struct osd_filldir_cbs buf = {
4854 #ifdef HAVE_DIR_CONTEXT
4855                 .ctx.actor = osd_ldiskfs_filldir,
4856 #endif
4857                 .it = it
4858         };
4859
4860         ENTRY;
4861         it->oie_dirent = it->oie_buf;
4862         it->oie_rd_dirent = 0;
4863
4864         if (obj->oo_hl_head != NULL) {
4865                 hlock = osd_oti_get(env)->oti_hlock;
4866                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
4867                                    inode, LDISKFS_HLOCK_READDIR);
4868         } else {
4869                 down_read(&obj->oo_ext_idx_sem);
4870         }
4871
4872 #ifdef HAVE_DIR_CONTEXT
4873         buf.ctx.pos = filp->f_pos;
4874         rc = inode->i_fop->iterate(filp, &buf.ctx);
4875         filp->f_pos = buf.ctx.pos;
4876 #else
4877         rc = inode->i_fop->readdir(filp, &buf, osd_ldiskfs_filldir);
4878 #endif
4879
4880         if (hlock != NULL)
4881                 ldiskfs_htree_unlock(hlock);
4882         else
4883                 up_read(&obj->oo_ext_idx_sem);
4884
4885         if (it->oie_rd_dirent == 0) {
4886                 /*If it does not get any dirent, it means it has been reached
4887                  *to the end of the dir */
4888                 it->oie_file.f_pos = ldiskfs_get_htree_eof(&it->oie_file);
4889                 if (rc == 0)
4890                         rc = 1;
4891         } else {
4892                 it->oie_dirent = it->oie_buf;
4893                 it->oie_it_dirent = 1;
4894         }
4895
4896         RETURN(rc);
4897 }
4898
4899 /**
4900  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
4901  * to load a directory entry at a time and stored it in
4902  * iterator's in-memory data structure.
4903  *
4904  * \param di iterator's in memory structure
4905  *
4906  * \retval +ve iterator reached to end
4907  * \retval   0 iterator not reached to end
4908  * \retval -ve on error
4909  */
4910 static int osd_it_ea_next(const struct lu_env *env, struct dt_it *di)
4911 {
4912         struct osd_it_ea *it = (struct osd_it_ea *)di;
4913         int rc;
4914
4915         ENTRY;
4916
4917         if (it->oie_it_dirent < it->oie_rd_dirent) {
4918                 it->oie_dirent =
4919                         (void *) it->oie_dirent +
4920                         cfs_size_round(sizeof(struct osd_it_ea_dirent) +
4921                                        it->oie_dirent->oied_namelen);
4922                 it->oie_it_dirent++;
4923                 RETURN(0);
4924         } else {
4925                 if (it->oie_file.f_pos == ldiskfs_get_htree_eof(&it->oie_file))
4926                         rc = +1;
4927                 else
4928                         rc = osd_ldiskfs_it_fill(env, di);
4929         }
4930
4931         RETURN(rc);
4932 }
4933
4934 /**
4935  * Returns the key at current position from iterator's in memory structure.
4936  *
4937  * \param di iterator's in memory structure
4938  *
4939  * \retval key i.e. struct dt_key on success
4940  */
4941 static struct dt_key *osd_it_ea_key(const struct lu_env *env,
4942                                     const struct dt_it *di)
4943 {
4944         struct osd_it_ea *it = (struct osd_it_ea *)di;
4945
4946         return (struct dt_key *)it->oie_dirent->oied_name;
4947 }
4948
4949 /**
4950  * Returns the key's size at current position from iterator's in memory structure.
4951  *
4952  * \param di iterator's in memory structure
4953  *
4954  * \retval key_size i.e. struct dt_key on success
4955  */
4956 static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
4957 {
4958         struct osd_it_ea *it = (struct osd_it_ea *)di;
4959
4960         return it->oie_dirent->oied_namelen;
4961 }
4962
4963 static int
4964 osd_dirent_update(handle_t *jh, struct super_block *sb,
4965                   struct osd_it_ea_dirent *ent, struct lu_fid *fid,
4966                   struct buffer_head *bh, struct ldiskfs_dir_entry_2 *de)
4967 {
4968         struct osd_fid_pack *rec;
4969         int                  rc;
4970         ENTRY;
4971
4972         LASSERT(de->file_type & LDISKFS_DIRENT_LUFID);
4973         LASSERT(de->rec_len >= de->name_len + sizeof(struct osd_fid_pack));
4974
4975         rc = ldiskfs_journal_get_write_access(jh, bh);
4976         if (rc != 0)
4977                 RETURN(rc);
4978
4979         rec = (struct osd_fid_pack *)(de->name + de->name_len + 1);
4980         fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
4981         rc = ldiskfs_handle_dirty_metadata(jh, NULL, bh);
4982
4983         RETURN(rc);
4984 }
4985
4986 static inline int
4987 osd_dirent_has_space(__u16 reclen, __u16 namelen, unsigned blocksize)
4988 {
4989         if (ldiskfs_rec_len_from_disk(reclen, blocksize) >=
4990             __LDISKFS_DIR_REC_LEN(namelen + 1 + sizeof(struct osd_fid_pack)))
4991                 return 1;
4992         else
4993                 return 0;
4994 }
4995
4996 static inline int
4997 osd_dot_dotdot_has_space(struct ldiskfs_dir_entry_2 *de, int dot_dotdot)
4998 {
4999         LASSERTF(dot_dotdot == 1 || dot_dotdot == 2,
5000                  "dot_dotdot = %d\n", dot_dotdot);
5001
5002         if (LDISKFS_DIR_REC_LEN(de) >=
5003             __LDISKFS_DIR_REC_LEN(dot_dotdot + 1 + sizeof(struct osd_fid_pack)))
5004                 return 1;
5005         else
5006                 return 0;
5007 }
5008
5009 static int
5010 osd_dirent_reinsert(const struct lu_env *env, handle_t *jh,
5011                     struct inode *dir, struct inode *inode,
5012                     struct osd_it_ea_dirent *ent, struct lu_fid *fid,
5013                     struct buffer_head *bh, struct ldiskfs_dir_entry_2 *de,
5014                     struct htree_lock *hlock)
5015 {
5016         struct dentry               *dentry;
5017         struct osd_fid_pack         *rec;
5018         struct ldiskfs_dentry_param *ldp;
5019         int                          rc;
5020         ENTRY;
5021
5022         if (!LDISKFS_HAS_INCOMPAT_FEATURE(inode->i_sb,
5023                                           LDISKFS_FEATURE_INCOMPAT_DIRDATA))
5024                 RETURN(0);
5025
5026         /* There is enough space to hold the FID-in-dirent. */
5027         if (osd_dirent_has_space(de->rec_len, ent->oied_namelen,
5028                                  dir->i_sb->s_blocksize)) {
5029                 rc = ldiskfs_journal_get_write_access(jh, bh);
5030                 if (rc != 0)
5031                         RETURN(rc);
5032
5033                 de->name[de->name_len] = 0;
5034                 rec = (struct osd_fid_pack *)(de->name + de->name_len + 1);
5035                 rec->fp_len = sizeof(struct lu_fid) + 1;
5036                 fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
5037                 de->file_type |= LDISKFS_DIRENT_LUFID;
5038
5039                 rc = ldiskfs_handle_dirty_metadata(jh, NULL, bh);
5040
5041                 RETURN(rc);
5042         }
5043
5044         rc = ldiskfs_delete_entry(jh, dir, de, bh);
5045         if (rc != 0)
5046                 RETURN(rc);
5047
5048         dentry = osd_child_dentry_by_inode(env, dir, ent->oied_name,
5049                                            ent->oied_namelen);
5050         ldp = (struct ldiskfs_dentry_param *)osd_oti_get(env)->oti_ldp;
5051         osd_get_ldiskfs_dirent_param(ldp, fid);
5052         dentry->d_fsdata = (void *)ldp;
5053         ll_vfs_dq_init(dir);
5054         rc = osd_ldiskfs_add_entry(jh, dentry, inode, hlock);
5055         /* It is too bad, we cannot reinsert the name entry back.
5056          * That means we lose it! */
5057         if (rc != 0)
5058                 CDEBUG(D_LFSCK, "%.16s: fail to reinsert the dirent, "
5059                        "dir = %lu/%u, name = %.*s, "DFID": rc = %d\n",
5060                        LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
5061                        dir->i_ino, dir->i_generation,
5062                        ent->oied_namelen, ent->oied_name, PFID(fid), rc);
5063
5064         RETURN(rc);
5065 }
5066
5067 static int
5068 osd_dirent_check_repair(const struct lu_env *env, struct osd_object *obj,
5069                         struct osd_it_ea *it, struct lu_fid *fid,
5070                         struct osd_inode_id *id, __u32 *attr)
5071 {
5072         struct osd_thread_info     *info        = osd_oti_get(env);
5073         struct lustre_mdt_attrs    *lma         = &info->oti_mdt_attrs;
5074         struct osd_device          *dev         = osd_obj2dev(obj);
5075         struct super_block         *sb          = osd_sb(dev);
5076         const char                 *devname     =
5077                                         LDISKFS_SB(sb)->s_es->s_volume_name;
5078         struct osd_it_ea_dirent    *ent         = it->oie_dirent;
5079         struct inode               *dir         = obj->oo_inode;
5080         struct htree_lock          *hlock       = NULL;
5081         struct buffer_head         *bh          = NULL;
5082         handle_t                   *jh          = NULL;
5083         struct ldiskfs_dir_entry_2 *de;
5084         struct dentry              *dentry;
5085         struct inode               *inode;
5086         int                         credits;
5087         int                         rc;
5088         int                         dot_dotdot  = 0;
5089         bool                        dirty       = false;
5090         ENTRY;
5091
5092         if (ent->oied_name[0] == '.') {
5093                 if (ent->oied_namelen == 1)
5094                         dot_dotdot = 1;
5095                 else if (ent->oied_namelen == 2 && ent->oied_name[1] == '.')
5096                         dot_dotdot = 2;
5097         }
5098
5099         dentry = osd_child_dentry_get(env, obj, ent->oied_name,
5100                                       ent->oied_namelen);
5101
5102         /* We need to ensure that the name entry is still valid.
5103          * Because it may be removed or renamed by other already.
5104          *
5105          * The unlink or rename operation will start journal before PDO lock,
5106          * so to avoid deadlock, here we need to start journal handle before
5107          * related PDO lock also. But because we do not know whether there
5108          * will be something to be repaired before PDO lock, we just start
5109          * journal without conditions.
5110          *
5111          * We may need to remove the name entry firstly, then insert back.
5112          * One credit is for user quota file update.
5113          * One credit is for group quota file update.
5114          * Two credits are for dirty inode. */
5115         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE] +
5116                   osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1 + 1 + 2;
5117
5118 again:
5119         if (dev->od_dirent_journal != 0) {
5120                 jh = osd_journal_start_sb(sb, LDISKFS_HT_MISC, credits);
5121                 if (IS_ERR(jh)) {
5122                         rc = PTR_ERR(jh);
5123                         CDEBUG(D_LFSCK, "%.16s: fail to start trans for dirent "
5124                                "check_repair, dir = %lu/%u, credits = %d, "
5125                                "name = %.*s: rc = %d\n",
5126                                devname, dir->i_ino, dir->i_generation, credits,
5127                                ent->oied_namelen, ent->oied_name, rc);
5128                         RETURN(rc);
5129                 }
5130
5131                 if (obj->oo_hl_head != NULL) {
5132                         hlock = osd_oti_get(env)->oti_hlock;
5133                         /* "0" means exclusive lock for the whole directory.
5134                          * We need to prevent others access such name entry
5135                          * during the delete + insert. Neither HLOCK_ADD nor
5136                          * HLOCK_DEL cannot guarantee the atomicity. */
5137                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir, 0);
5138                 } else {
5139                         down_write(&obj->oo_ext_idx_sem);
5140                 }
5141         } else {
5142                 if (obj->oo_hl_head != NULL) {
5143                         hlock = osd_oti_get(env)->oti_hlock;
5144                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir,
5145                                            LDISKFS_HLOCK_LOOKUP);
5146                 } else {
5147                         down_read(&obj->oo_ext_idx_sem);
5148                 }
5149         }
5150
5151         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
5152         /* For dot/dotdot entry, if there is not enough space to hold the
5153          * FID-in-dirent, just keep them there. It only happens when the
5154          * device upgraded from 1.8 or restored from MDT file-level backup.
5155          * For the whole directory, only dot/dotdot entry have no FID-in-dirent
5156          * and needs to get FID from LMA when readdir, it will not affect the
5157          * performance much. */
5158         if ((bh == NULL) || (le32_to_cpu(de->inode) != ent->oied_ino) ||
5159             (dot_dotdot != 0 && !osd_dot_dotdot_has_space(de, dot_dotdot))) {
5160                 *attr |= LUDA_IGNORE;
5161                 GOTO(out_journal, rc = 0);
5162         }
5163
5164         osd_id_gen(id, ent->oied_ino, OSD_OII_NOGEN);
5165         inode = osd_iget(info, dev, id);
5166         if (IS_ERR(inode)) {
5167                 rc = PTR_ERR(inode);
5168                 if (rc == -ENOENT || rc == -ESTALE)
5169                         rc = 1;
5170                 else
5171                         CDEBUG(D_LFSCK, "%.16s: fail to iget for dirent "
5172                                "check_repair, dir = %lu/%u, name = %.*s: "
5173                                "rc = %d\n",
5174                                devname, dir->i_ino, dir->i_generation,
5175                                ent->oied_namelen, ent->oied_name, rc);
5176
5177                 GOTO(out_journal, rc);
5178         }
5179
5180         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
5181         if (rc == 0) {
5182                 LASSERT(!(lma->lma_compat & LMAC_NOT_IN_OI));
5183
5184                 if (fid_is_sane(fid)) {
5185                         /* FID-in-dirent is valid. */
5186                         if (lu_fid_eq(fid, &lma->lma_self_fid))
5187                                 GOTO(out_inode, rc = 0);
5188
5189                         /* Do not repair under dryrun mode. */
5190                         if (*attr & LUDA_VERIFY_DRYRUN) {
5191                                 *attr |= LUDA_REPAIR;
5192                                 GOTO(out_inode, rc = 0);
5193                         }
5194
5195                         if (dev->od_dirent_journal == 0) {
5196                                 iput(inode);
5197                                 brelse(bh);
5198                                 if (hlock != NULL)
5199                                         ldiskfs_htree_unlock(hlock);
5200                                 else
5201                                         up_read(&obj->oo_ext_idx_sem);
5202                                 dev->od_dirent_journal = 1;
5203                                 goto again;
5204                         }
5205
5206                         *fid = lma->lma_self_fid;
5207                         dirty = true;
5208                         /* Update the FID-in-dirent. */
5209                         rc = osd_dirent_update(jh, sb, ent, fid, bh, de);
5210                         if (rc == 0)
5211                                 *attr |= LUDA_REPAIR;
5212                         else
5213                                 CDEBUG(D_LFSCK, "%.16s: fail to update FID "
5214                                        "in the dirent, dir = %lu/%u, "
5215                                        "name = %.*s, "DFID": rc = %d\n",
5216                                        devname, dir->i_ino, dir->i_generation,
5217                                        ent->oied_namelen, ent->oied_name,
5218                                        PFID(fid), rc);
5219                 } else {
5220                         /* Do not repair under dryrun mode. */
5221                         if (*attr & LUDA_VERIFY_DRYRUN) {
5222                                 *fid = lma->lma_self_fid;
5223                                 *attr |= LUDA_REPAIR;
5224                                 GOTO(out_inode, rc = 0);
5225                         }
5226
5227                         if (dev->od_dirent_journal == 0) {
5228                                 iput(inode);
5229                                 brelse(bh);
5230                                 if (hlock != NULL)
5231                                         ldiskfs_htree_unlock(hlock);
5232                                 else
5233                                         up_read(&obj->oo_ext_idx_sem);
5234                                 dev->od_dirent_journal = 1;
5235                                 goto again;
5236                         }
5237
5238                         *fid = lma->lma_self_fid;
5239                         dirty = true;
5240                         /* Append the FID-in-dirent. */
5241                         rc = osd_dirent_reinsert(env, jh, dir, inode, ent,
5242                                                  fid, bh, de, hlock);
5243                         if (rc == 0)
5244                                 *attr |= LUDA_REPAIR;
5245                         else
5246                                 CDEBUG(D_LFSCK, "%.16s: fail to append FID "
5247                                        "after the dirent, dir = %lu/%u, "
5248                                        "name = %.*s, "DFID": rc = %d\n",
5249                                        devname, dir->i_ino, dir->i_generation,
5250                                        ent->oied_namelen, ent->oied_name,
5251                                        PFID(fid), rc);
5252                 }
5253         } else if (rc == -ENODATA) {
5254                 /* Do not repair under dryrun mode. */
5255                 if (*attr & LUDA_VERIFY_DRYRUN) {
5256                         if (fid_is_sane(fid)) {
5257                                 *attr |= LUDA_REPAIR;
5258                         } else {
5259                                 lu_igif_build(fid, inode->i_ino,
5260                                               inode->i_generation);
5261                                 *attr |= LUDA_UPGRADE;
5262                         }
5263                         GOTO(out_inode, rc = 0);
5264                 }
5265
5266                 if (dev->od_dirent_journal == 0) {
5267                         iput(inode);
5268                         brelse(bh);
5269                         if (hlock != NULL)
5270                                 ldiskfs_htree_unlock(hlock);
5271                         else
5272                                 up_read(&obj->oo_ext_idx_sem);
5273                         dev->od_dirent_journal = 1;
5274                         goto again;
5275                 }
5276
5277                 dirty = true;
5278                 if (unlikely(fid_is_sane(fid))) {
5279                         /* FID-in-dirent exists, but FID-in-LMA is lost.
5280                          * Trust the FID-in-dirent, and add FID-in-LMA. */
5281                         rc = osd_ea_fid_set(info, inode, fid, 0, 0);
5282                         if (rc == 0)
5283                                 *attr |= LUDA_REPAIR;
5284                         else
5285                                 CDEBUG(D_LFSCK, "%.16s: fail to set LMA for "
5286                                        "update dirent, dir = %lu/%u, "
5287                                        "name = %.*s, "DFID": rc = %d\n",
5288                                        devname, dir->i_ino, dir->i_generation,
5289                                        ent->oied_namelen, ent->oied_name,
5290                                        PFID(fid), rc);
5291                 } else {
5292                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
5293                         /* It is probably IGIF object. Only aappend the
5294                          * FID-in-dirent. OI scrub will process FID-in-LMA. */
5295                         rc = osd_dirent_reinsert(env, jh, dir, inode, ent,
5296                                                  fid, bh, de, hlock);
5297                         if (rc == 0)
5298                                 *attr |= LUDA_UPGRADE;
5299                         else
5300                                 CDEBUG(D_LFSCK, "%.16s: fail to append IGIF "
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         }
5308
5309         GOTO(out_inode, rc);
5310
5311 out_inode:
5312         iput(inode);
5313
5314 out_journal:
5315         brelse(bh);
5316         if (hlock != NULL) {
5317                 ldiskfs_htree_unlock(hlock);
5318         } else {
5319                 if (dev->od_dirent_journal != 0)
5320                         up_write(&obj->oo_ext_idx_sem);
5321                 else
5322                         up_read(&obj->oo_ext_idx_sem);
5323         }
5324         if (jh != NULL)
5325                 ldiskfs_journal_stop(jh);
5326         if (rc >= 0 && !dirty)
5327                 dev->od_dirent_journal = 0;
5328         return rc;
5329 }
5330
5331 /**
5332  * Returns the value at current position from iterator's in memory structure.
5333  *
5334  * \param di struct osd_it_ea, iterator's in memory structure
5335  * \param attr attr requested for dirent.
5336  * \param lde lustre dirent
5337  *
5338  * \retval   0 no error and \param lde has correct lustre dirent.
5339  * \retval -ve on error
5340  */
5341 static inline int osd_it_ea_rec(const struct lu_env *env,
5342                                 const struct dt_it *di,
5343                                 struct dt_rec *dtrec, __u32 attr)
5344 {
5345         struct osd_it_ea       *it    = (struct osd_it_ea *)di;
5346         struct osd_object      *obj   = it->oie_obj;
5347         struct osd_device      *dev   = osd_obj2dev(obj);
5348         struct osd_thread_info *oti   = osd_oti_get(env);
5349         struct osd_inode_id    *id    = &oti->oti_id;
5350         struct lu_fid          *fid   = &it->oie_dirent->oied_fid;
5351         struct lu_dirent       *lde   = (struct lu_dirent *)dtrec;
5352         __u32                   ino   = it->oie_dirent->oied_ino;
5353         int                     rc    = 0;
5354         ENTRY;
5355
5356         LASSERT(obj->oo_inode != dev->od_mdt_map->omm_remote_parent->d_inode);
5357
5358         if (attr & LUDA_VERIFY) {
5359                 if (unlikely(ino == osd_remote_parent_ino(dev))) {
5360                         attr |= LUDA_IGNORE;
5361                         /* If the parent is on remote MDT, and there
5362                          * is no FID-in-dirent, then we have to get
5363                          * the parent FID from the linkEA.  */
5364                         if (!fid_is_sane(fid) &&
5365                             it->oie_dirent->oied_namelen == 2 &&
5366                             it->oie_dirent->oied_name[0] == '.' &&
5367                             it->oie_dirent->oied_name[1] == '.')
5368                                 osd_get_pfid_from_linkea(env, obj, fid);
5369                 } else {
5370                         rc = osd_dirent_check_repair(env, obj, it, fid, id,
5371                                                      &attr);
5372                 }
5373         } else {
5374                 attr &= ~LU_DIRENT_ATTRS_MASK;
5375                 if (!fid_is_sane(fid)) {
5376                         bool is_dotdot = false;
5377                         if (it->oie_dirent->oied_namelen == 2 &&
5378                             it->oie_dirent->oied_name[0] == '.' &&
5379                             it->oie_dirent->oied_name[1] == '.')
5380                                 is_dotdot = true;
5381                         /* If the parent is on remote MDT, and there
5382                          * is no FID-in-dirent, then we have to get
5383                          * the parent FID from the linkEA.  */
5384                         if (ino == osd_remote_parent_ino(dev) && is_dotdot) {
5385                                 rc = osd_get_pfid_from_linkea(env, obj, fid);
5386                         } else {
5387                                 if (is_dotdot == false &&
5388                                     OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP))
5389                                         RETURN(-ENOENT);
5390
5391                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
5392                         }
5393                 } else {
5394                         osd_id_gen(id, ino, OSD_OII_NOGEN);
5395                 }
5396         }
5397
5398         /* Pack the entry anyway, at least the offset is right. */
5399         osd_it_pack_dirent(lde, fid, it->oie_dirent->oied_off,
5400                            it->oie_dirent->oied_name,
5401                            it->oie_dirent->oied_namelen,
5402                            it->oie_dirent->oied_type, attr);
5403
5404         if (rc < 0)
5405                 RETURN(rc);
5406
5407         if (osd_remote_fid(env, dev, fid))
5408                 RETURN(0);
5409
5410         if (likely(!(attr & LUDA_IGNORE) && rc == 0))
5411                 osd_add_oi_cache(oti, dev, id, fid);
5412
5413         RETURN(rc > 0 ? 0 : rc);
5414 }
5415
5416 /**
5417  * Returns the record size size at current position.
5418  *
5419  * This function will return record(lu_dirent) size in bytes.
5420  *
5421  * \param[in] env       execution environment
5422  * \param[in] di        iterator's in memory structure
5423  * \param[in] attr      attribute of the entry, only requires LUDA_TYPE to
5424  *                      calculate the lu_dirent size.
5425  *
5426  * \retval      record size(in bytes & in memory) of the current lu_dirent
5427  *              entry.
5428  */
5429 static int osd_it_ea_rec_size(const struct lu_env *env, const struct dt_it *di,
5430                               __u32 attr)
5431 {
5432         struct osd_it_ea *it = (struct osd_it_ea *)di;
5433
5434         return lu_dirent_calc_size(it->oie_dirent->oied_namelen, attr);
5435 }
5436
5437 /**
5438  * Returns a cookie for current position of the iterator head, so that
5439  * user can use this cookie to load/start the iterator next time.
5440  *
5441  * \param di iterator's in memory structure
5442  *
5443  * \retval cookie for current position, on success
5444  */
5445 static __u64 osd_it_ea_store(const struct lu_env *env, const struct dt_it *di)
5446 {
5447         struct osd_it_ea *it = (struct osd_it_ea *)di;
5448
5449         return it->oie_dirent->oied_off;
5450 }
5451
5452 /**
5453  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
5454  * to load a directory entry at a time and stored it i inn,
5455  * in iterator's in-memory data structure.
5456  *
5457  * \param di struct osd_it_ea, iterator's in memory structure
5458  *
5459  * \retval +ve on success
5460  * \retval -ve on error
5461  */
5462 static int osd_it_ea_load(const struct lu_env *env,
5463                           const struct dt_it *di, __u64 hash)
5464 {
5465         struct osd_it_ea *it = (struct osd_it_ea *)di;
5466         int rc;
5467
5468         ENTRY;
5469         it->oie_file.f_pos = hash;
5470
5471         rc =  osd_ldiskfs_it_fill(env, di);
5472         if (rc > 0)
5473                 rc = -ENODATA;
5474
5475         if (rc == 0)
5476                 rc = +1;
5477
5478         RETURN(rc);
5479 }
5480
5481 /**
5482  * Index lookup function for interoperability mode (b11826).
5483  *
5484  * \param key,  key i.e. file name to be searched
5485  *
5486  * \retval +ve, on success
5487  * \retval -ve, on error
5488  */
5489 static int osd_index_ea_lookup(const struct lu_env *env, struct dt_object *dt,
5490                                struct dt_rec *rec, const struct dt_key *key)
5491 {
5492         struct osd_object *obj = osd_dt_obj(dt);
5493         int rc = 0;
5494
5495         ENTRY;
5496
5497         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
5498         LINVRNT(osd_invariant(obj));
5499
5500         rc = osd_ea_lookup_rec(env, obj, rec, key);
5501         if (rc == 0)
5502                 rc = +1;
5503         RETURN(rc);
5504 }
5505
5506 /**
5507  * Index and Iterator operations for interoperability
5508  * mode (i.e. to run 2.0 mds on 1.8 disk) (b11826)
5509  */
5510 static const struct dt_index_operations osd_index_ea_ops = {
5511         .dio_lookup         = osd_index_ea_lookup,
5512         .dio_declare_insert = osd_index_declare_ea_insert,
5513         .dio_insert         = osd_index_ea_insert,
5514         .dio_declare_delete = osd_index_declare_ea_delete,
5515         .dio_delete         = osd_index_ea_delete,
5516         .dio_it     = {
5517                 .init     = osd_it_ea_init,
5518                 .fini     = osd_it_ea_fini,
5519                 .get      = osd_it_ea_get,
5520                 .put      = osd_it_ea_put,
5521                 .next     = osd_it_ea_next,
5522                 .key      = osd_it_ea_key,
5523                 .key_size = osd_it_ea_key_size,
5524                 .rec      = osd_it_ea_rec,
5525                 .rec_size = osd_it_ea_rec_size,
5526                 .store    = osd_it_ea_store,
5527                 .load     = osd_it_ea_load
5528         }
5529 };
5530
5531 static void *osd_key_init(const struct lu_context *ctx,
5532                           struct lu_context_key *key)
5533 {
5534         struct osd_thread_info *info;
5535
5536         OBD_ALLOC_PTR(info);
5537         if (info == NULL)
5538                 return ERR_PTR(-ENOMEM);
5539
5540         OBD_ALLOC(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
5541         if (info->oti_it_ea_buf == NULL)
5542                 goto out_free_info;
5543
5544         info->oti_env = container_of(ctx, struct lu_env, le_ctx);
5545
5546         info->oti_hlock = ldiskfs_htree_lock_alloc();
5547         if (info->oti_hlock == NULL)
5548                 goto out_free_ea;
5549
5550         return info;
5551
5552  out_free_ea:
5553         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
5554  out_free_info:
5555         OBD_FREE_PTR(info);
5556         return ERR_PTR(-ENOMEM);
5557 }
5558
5559 static void osd_key_fini(const struct lu_context *ctx,
5560                          struct lu_context_key *key, void* data)
5561 {
5562         struct osd_thread_info *info = data;
5563
5564         if (info->oti_inode != NULL)
5565                 OBD_FREE_PTR(info->oti_inode);
5566         if (info->oti_hlock != NULL)
5567                 ldiskfs_htree_lock_free(info->oti_hlock);
5568         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
5569         lu_buf_free(&info->oti_iobuf.dr_pg_buf);
5570         lu_buf_free(&info->oti_iobuf.dr_bl_buf);
5571         lu_buf_free(&info->oti_big_buf);
5572         OBD_FREE_PTR(info);
5573 }
5574
5575 static void osd_key_exit(const struct lu_context *ctx,
5576                          struct lu_context_key *key, void *data)
5577 {
5578         struct osd_thread_info *info = data;
5579
5580         LASSERT(info->oti_r_locks == 0);
5581         LASSERT(info->oti_w_locks == 0);
5582         LASSERT(info->oti_txns    == 0);
5583 }
5584
5585 /* type constructor/destructor: osd_type_init, osd_type_fini */
5586 LU_TYPE_INIT_FINI(osd, &osd_key);
5587
5588 struct lu_context_key osd_key = {
5589         .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL,
5590         .lct_init = osd_key_init,
5591         .lct_fini = osd_key_fini,
5592         .lct_exit = osd_key_exit
5593 };
5594
5595
5596 static int osd_device_init(const struct lu_env *env, struct lu_device *d,
5597                            const char *name, struct lu_device *next)
5598 {
5599         struct osd_device *osd = osd_dev(d);
5600
5601         if (strlcpy(osd->od_svname, name, sizeof(osd->od_svname))
5602             >= sizeof(osd->od_svname))
5603                 return -E2BIG;
5604         return osd_procfs_init(osd, name);
5605 }
5606
5607 static int osd_fid_init(const struct lu_env *env, struct osd_device *osd)
5608 {
5609         struct seq_server_site  *ss = osd_seq_site(osd);
5610         int                     rc;
5611         ENTRY;
5612
5613         if (osd->od_is_ost || osd->od_cl_seq != NULL)
5614                 RETURN(0);
5615
5616         if (unlikely(ss == NULL))
5617                 RETURN(-ENODEV);
5618
5619         OBD_ALLOC_PTR(osd->od_cl_seq);
5620         if (osd->od_cl_seq == NULL)
5621                 RETURN(-ENOMEM);
5622
5623         rc = seq_client_init(osd->od_cl_seq, NULL, LUSTRE_SEQ_METADATA,
5624                              osd->od_svname, ss->ss_server_seq);
5625         if (rc != 0) {
5626                 OBD_FREE_PTR(osd->od_cl_seq);
5627                 osd->od_cl_seq = NULL;
5628                 RETURN(rc);
5629         }
5630
5631         if (ss->ss_node_id == 0) {
5632                 /* If the OSD on the sequence controller(MDT0), then allocate
5633                  * sequence here, otherwise allocate sequence after connected
5634                  * to MDT0 (see mdt_register_lwp_callback()). */
5635                 rc = seq_server_alloc_meta(osd->od_cl_seq->lcs_srv,
5636                                    &osd->od_cl_seq->lcs_space, env);
5637         }
5638
5639         RETURN(rc);
5640 }
5641
5642 static void osd_fid_fini(const struct lu_env *env, struct osd_device *osd)
5643 {
5644         if (osd->od_cl_seq == NULL)
5645                 return;
5646
5647         seq_client_fini(osd->od_cl_seq);
5648         OBD_FREE_PTR(osd->od_cl_seq);
5649         osd->od_cl_seq = NULL;
5650 }
5651
5652 static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
5653 {
5654         ENTRY;
5655
5656         /* shutdown quota slave instance associated with the device */
5657         if (o->od_quota_slave != NULL) {
5658                 qsd_fini(env, o->od_quota_slave);
5659                 o->od_quota_slave = NULL;
5660         }
5661
5662         osd_fid_fini(env, o);
5663
5664         RETURN(0);
5665 }
5666
5667 static void osd_umount(const struct lu_env *env, struct osd_device *o)
5668 {
5669         ENTRY;
5670
5671         if (o->od_mnt != NULL) {
5672                 shrink_dcache_sb(osd_sb(o));
5673                 osd_sync(env, &o->od_dt_dev);
5674
5675                 mntput(o->od_mnt);
5676                 o->od_mnt = NULL;
5677         }
5678
5679         EXIT;
5680 }
5681
5682 static int osd_mount(const struct lu_env *env,
5683                      struct osd_device *o, struct lustre_cfg *cfg)
5684 {
5685         const char              *name  = lustre_cfg_string(cfg, 0);
5686         const char              *dev  = lustre_cfg_string(cfg, 1);
5687         const char              *opts;
5688         unsigned long            page, s_flags, lmd_flags = 0;
5689         struct page             *__page;
5690         struct file_system_type *type;
5691         char                    *options = NULL;
5692         char                    *str;
5693         struct osd_thread_info  *info = osd_oti_get(env);
5694         struct lu_fid           *fid = &info->oti_fid;
5695         struct inode            *inode;
5696         int                      rc = 0, force_over_128tb = 0;
5697         ENTRY;
5698
5699         if (o->od_mnt != NULL)
5700                 RETURN(0);
5701
5702         if (strlen(dev) >= sizeof(o->od_mntdev))
5703                 RETURN(-E2BIG);
5704         strcpy(o->od_mntdev, dev);
5705
5706         str = lustre_cfg_string(cfg, 2);
5707         s_flags = simple_strtoul(str, NULL, 0);
5708         str = strstr(str, ":");
5709         if (str)
5710                 lmd_flags = simple_strtoul(str + 1, NULL, 0);
5711         opts = lustre_cfg_string(cfg, 3);
5712 #ifdef __BIG_ENDIAN
5713         if (opts == NULL || strstr(opts, "bigendian_extents") == NULL) {
5714                 CERROR("%s: device %s extents feature is not guaranteed to "
5715                        "work on big-endian systems. Use \"bigendian_extents\" "
5716                        "mount option to override.\n", name, dev);
5717                 RETURN(-EINVAL);
5718         }
5719 #endif
5720         if (opts != NULL && strstr(opts, "force_over_128tb") != NULL)
5721                 force_over_128tb = 1;
5722
5723         __page = alloc_page(GFP_IOFS);
5724         if (__page == NULL)
5725                 GOTO(out, rc = -ENOMEM);
5726         page = (unsigned long)page_address(__page);
5727         options = (char *)page;
5728         *options = '\0';
5729         if (opts != NULL) {
5730                 /* strip out the options for back compatiblity */
5731                 static char *sout[] = {
5732                         "mballoc",
5733                         "iopen",
5734                         "noiopen",
5735                         "iopen_nopriv",
5736                         "extents",
5737                         "noextents",
5738                         /* strip out option we processed in osd */
5739                         "bigendian_extents",
5740                         "force_over_128tb",
5741                         NULL
5742                 };
5743                 strcat(options, opts);
5744                 for (rc = 0, str = options; sout[rc]; ) {
5745                         char *op = strstr(str, sout[rc]);
5746                         if (op == NULL) {
5747                                 rc++;
5748                                 str = options;
5749                                 continue;
5750                         }
5751                         if (op == options || *(op - 1) == ',') {
5752                                 str = op + strlen(sout[rc]);
5753                                 if (*str == ',' || *str == '\0') {
5754                                         *str == ',' ? str++ : str;
5755                                         memmove(op, str, strlen(str) + 1);
5756                                 }
5757                         }
5758                         for (str = op; *str != ',' && *str != '\0'; str++)
5759                                 ;
5760                 }
5761         } else {
5762                 strncat(options, "user_xattr,acl", 14);
5763         }
5764
5765         /* Glom up mount options */
5766         if (*options != '\0')
5767                 strcat(options, ",");
5768         strlcat(options, "no_mbcache", PAGE_CACHE_SIZE);
5769
5770         type = get_fs_type("ldiskfs");
5771         if (!type) {
5772                 CERROR("%s: cannot find ldiskfs module\n", name);
5773                 GOTO(out, rc = -ENODEV);
5774         }
5775
5776         o->od_mnt = vfs_kern_mount(type, s_flags, dev, options);
5777         module_put(type->owner);
5778
5779         if (IS_ERR(o->od_mnt)) {
5780                 rc = PTR_ERR(o->od_mnt);
5781                 o->od_mnt = NULL;
5782                 CERROR("%s: can't mount %s: %d\n", name, dev, rc);
5783                 GOTO(out, rc);
5784         }
5785
5786         if (ldiskfs_blocks_count(LDISKFS_SB(osd_sb(o))->s_es) > (8ULL << 32) &&
5787             force_over_128tb == 0) {
5788                 CERROR("%s: device %s LDISKFS does not support filesystems "
5789                        "greater than 128TB and can cause data corruption. "
5790                        "Use \"force_over_128tb\" mount option to override.\n",
5791                        name, dev);
5792                 GOTO(out, rc = -EINVAL);
5793         }
5794
5795 #ifdef HAVE_DEV_SET_RDONLY
5796         if (dev_check_rdonly(o->od_mnt->mnt_sb->s_bdev)) {
5797                 CERROR("%s: underlying device %s is marked as read-only. "
5798                        "Setup failed\n", name, dev);
5799                 GOTO(out_mnt, rc = -EROFS);
5800         }
5801 #endif
5802
5803         if (!LDISKFS_HAS_COMPAT_FEATURE(o->od_mnt->mnt_sb,
5804                                         LDISKFS_FEATURE_COMPAT_HAS_JOURNAL)) {
5805                 CERROR("%s: device %s is mounted w/o journal\n", name, dev);
5806                 GOTO(out_mnt, rc = -EINVAL);
5807         }
5808
5809 #ifdef LDISKFS_MOUNT_DIRDATA
5810         if (LDISKFS_HAS_INCOMPAT_FEATURE(o->od_mnt->mnt_sb,
5811                                          LDISKFS_FEATURE_INCOMPAT_DIRDATA))
5812                 LDISKFS_SB(osd_sb(o))->s_mount_opt |= LDISKFS_MOUNT_DIRDATA;
5813         else if (!o->od_is_ost)
5814                 CWARN("%s: device %s was upgraded from Lustre-1.x without "
5815                       "enabling the dirdata feature. If you do not want to "
5816                       "downgrade to Lustre-1.x again, you can enable it via "
5817                       "'tune2fs -O dirdata device'\n", name, dev);
5818 #endif
5819         inode = osd_sb(o)->s_root->d_inode;
5820         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
5821         rc = osd_ea_fid_set(info, inode, fid, LMAC_NOT_IN_OI, 0);
5822         if (rc != 0) {
5823                 CERROR("%s: failed to set lma on %s root inode\n", name, dev);
5824                 GOTO(out_mnt, rc);
5825         }
5826
5827         if (lmd_flags & LMD_FLG_NOSCRUB)
5828                 o->od_noscrub = 1;
5829
5830         GOTO(out, rc = 0);
5831
5832 out_mnt:
5833         mntput(o->od_mnt);
5834         o->od_mnt = NULL;
5835
5836 out:
5837         if (__page)
5838                 __free_page(__page);
5839
5840         return rc;
5841 }
5842
5843 static struct lu_device *osd_device_fini(const struct lu_env *env,
5844                                          struct lu_device *d)
5845 {
5846         struct osd_device *o = osd_dev(d);
5847         ENTRY;
5848
5849         osd_shutdown(env, o);
5850         osd_procfs_fini(o);
5851         osd_scrub_cleanup(env, o);
5852         osd_obj_map_fini(o);
5853         osd_umount(env, o);
5854
5855         RETURN(NULL);
5856 }
5857
5858 static int osd_device_init0(const struct lu_env *env,
5859                             struct osd_device *o,
5860                             struct lustre_cfg *cfg)
5861 {
5862         struct lu_device        *l = osd2lu_dev(o);
5863         struct osd_thread_info *info;
5864         int                     rc;
5865         int                     cplen = 0;
5866
5867         /* if the module was re-loaded, env can loose its keys */
5868         rc = lu_env_refill((struct lu_env *) env);
5869         if (rc)
5870                 GOTO(out, rc);
5871         info = osd_oti_get(env);
5872         LASSERT(info);
5873
5874         l->ld_ops = &osd_lu_ops;
5875         o->od_dt_dev.dd_ops = &osd_dt_ops;
5876
5877         spin_lock_init(&o->od_osfs_lock);
5878         mutex_init(&o->od_otable_mutex);
5879
5880         o->od_read_cache = 1;
5881         o->od_writethrough_cache = 1;
5882         o->od_readcache_max_filesize = OSD_MAX_CACHE_SIZE;
5883
5884         cplen = strlcpy(o->od_svname, lustre_cfg_string(cfg, 4),
5885                         sizeof(o->od_svname));
5886         if (cplen >= sizeof(o->od_svname)) {
5887                 rc = -E2BIG;
5888                 GOTO(out, rc);
5889         }
5890
5891         o->od_index = -1; /* -1 means index is invalid */
5892         rc = server_name2index(o->od_svname, &o->od_index, NULL);
5893         if (rc == LDD_F_SV_TYPE_OST)
5894                 o->od_is_ost = 1;
5895
5896         o->od_full_scrub_ratio = OFSR_DEFAULT;
5897         o->od_full_scrub_threshold_rate = FULL_SCRUB_THRESHOLD_RATE_DEFAULT;
5898         rc = osd_mount(env, o, cfg);
5899         if (rc != 0)
5900                 GOTO(out, rc);
5901
5902         rc = osd_obj_map_init(env, o);
5903         if (rc != 0)
5904                 GOTO(out_mnt, rc);
5905
5906         rc = lu_site_init(&o->od_site, l);
5907         if (rc != 0)
5908                 GOTO(out_compat, rc);
5909         o->od_site.ls_bottom_dev = l;
5910
5911         rc = lu_site_init_finish(&o->od_site);
5912         if (rc != 0)
5913                 GOTO(out_site, rc);
5914
5915         INIT_LIST_HEAD(&o->od_ios_list);
5916         /* setup scrub, including OI files initialization */
5917         rc = osd_scrub_setup(env, o);
5918         if (rc < 0)
5919                 GOTO(out_site, rc);
5920
5921         rc = osd_procfs_init(o, o->od_svname);
5922         if (rc != 0) {
5923                 CERROR("%s: can't initialize procfs: rc = %d\n",
5924                        o->od_svname, rc);
5925                 GOTO(out_scrub, rc);
5926         }
5927
5928         LASSERT(l->ld_site->ls_linkage.next != NULL);
5929         LASSERT(l->ld_site->ls_linkage.prev != NULL);
5930
5931         /* initialize quota slave instance */
5932         o->od_quota_slave = qsd_init(env, o->od_svname, &o->od_dt_dev,
5933                                      o->od_proc_entry);
5934         if (IS_ERR(o->od_quota_slave)) {
5935                 rc = PTR_ERR(o->od_quota_slave);
5936                 o->od_quota_slave = NULL;
5937                 GOTO(out_procfs, rc);
5938         }
5939
5940         RETURN(0);
5941
5942 out_procfs:
5943         osd_procfs_fini(o);
5944 out_scrub:
5945         osd_scrub_cleanup(env, o);
5946 out_site:
5947         lu_site_fini(&o->od_site);
5948 out_compat:
5949         osd_obj_map_fini(o);
5950 out_mnt:
5951         osd_umount(env, o);
5952 out:
5953         return rc;
5954 }
5955
5956 static struct lu_device *osd_device_alloc(const struct lu_env *env,
5957                                           struct lu_device_type *t,
5958                                           struct lustre_cfg *cfg)
5959 {
5960         struct osd_device *o;
5961         int                rc;
5962
5963         OBD_ALLOC_PTR(o);
5964         if (o == NULL)
5965                 return ERR_PTR(-ENOMEM);
5966
5967         rc = dt_device_init(&o->od_dt_dev, t);
5968         if (rc == 0) {
5969                 /* Because the ctx might be revived in dt_device_init,
5970                  * refill the env here */
5971                 lu_env_refill((struct lu_env *)env);
5972                 rc = osd_device_init0(env, o, cfg);
5973                 if (rc)
5974                         dt_device_fini(&o->od_dt_dev);
5975         }
5976
5977         if (unlikely(rc != 0))
5978                 OBD_FREE_PTR(o);
5979
5980         return rc == 0 ? osd2lu_dev(o) : ERR_PTR(rc);
5981 }
5982
5983 static struct lu_device *osd_device_free(const struct lu_env *env,
5984                                          struct lu_device *d)
5985 {
5986         struct osd_device *o = osd_dev(d);
5987         ENTRY;
5988
5989         /* XXX: make osd top device in order to release reference */
5990         d->ld_site->ls_top_dev = d;
5991         lu_site_purge(env, d->ld_site, -1);
5992         if (!cfs_hash_is_empty(d->ld_site->ls_obj_hash)) {
5993                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
5994                 lu_site_print(env, d->ld_site, &msgdata, lu_cdebug_printer);
5995         }
5996         lu_site_fini(&o->od_site);
5997         dt_device_fini(&o->od_dt_dev);
5998         OBD_FREE_PTR(o);
5999         RETURN(NULL);
6000 }
6001
6002 static int osd_process_config(const struct lu_env *env,
6003                               struct lu_device *d, struct lustre_cfg *cfg)
6004 {
6005         struct osd_device               *o = osd_dev(d);
6006         int                             rc;
6007         ENTRY;
6008
6009         switch (cfg->lcfg_command) {
6010         case LCFG_SETUP:
6011                 rc = osd_mount(env, o, cfg);
6012                 break;
6013         case LCFG_CLEANUP:
6014                 lu_dev_del_linkage(d->ld_site, d);
6015                 rc = osd_shutdown(env, o);
6016                 break;
6017         case LCFG_PARAM:
6018                 LASSERT(&o->od_dt_dev);
6019                 rc = class_process_proc_param(PARAM_OSD, lprocfs_osd_obd_vars,
6020                                               cfg, &o->od_dt_dev);
6021                 if (rc > 0 || rc == -ENOSYS)
6022                         rc = class_process_proc_param(PARAM_OST,
6023                                                       lprocfs_osd_obd_vars,
6024                                                       cfg, &o->od_dt_dev);
6025                 break;
6026         default:
6027                 rc = -ENOSYS;
6028         }
6029
6030         RETURN(rc);
6031 }
6032
6033 static int osd_recovery_complete(const struct lu_env *env,
6034                                  struct lu_device *d)
6035 {
6036         struct osd_device       *osd = osd_dev(d);
6037         int                      rc = 0;
6038         ENTRY;
6039
6040         if (osd->od_quota_slave == NULL)
6041                 RETURN(0);
6042
6043         /* start qsd instance on recovery completion, this notifies the quota
6044          * slave code that we are about to process new requests now */
6045         rc = qsd_start(env, osd->od_quota_slave);
6046         RETURN(rc);
6047 }
6048
6049 /*
6050  * we use exports to track all osd users
6051  */
6052 static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
6053                            struct obd_device *obd, struct obd_uuid *cluuid,
6054                            struct obd_connect_data *data, void *localdata)
6055 {
6056         struct osd_device    *osd = osd_dev(obd->obd_lu_dev);
6057         struct lustre_handle  conn;
6058         int                   rc;
6059         ENTRY;
6060
6061         CDEBUG(D_CONFIG, "connect #%d\n", osd->od_connects);
6062
6063         rc = class_connect(&conn, obd, cluuid);
6064         if (rc)
6065                 RETURN(rc);
6066
6067         *exp = class_conn2export(&conn);
6068
6069         spin_lock(&osd->od_osfs_lock);
6070         osd->od_connects++;
6071         spin_unlock(&osd->od_osfs_lock);
6072
6073         RETURN(0);
6074 }
6075
6076 /*
6077  * once last export (we don't count self-export) disappeared
6078  * osd can be released
6079  */
6080 static int osd_obd_disconnect(struct obd_export *exp)
6081 {
6082         struct obd_device *obd = exp->exp_obd;
6083         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
6084         int                rc, release = 0;
6085         ENTRY;
6086
6087         /* Only disconnect the underlying layers on the final disconnect. */
6088         spin_lock(&osd->od_osfs_lock);
6089         osd->od_connects--;
6090         if (osd->od_connects == 0)
6091                 release = 1;
6092         spin_unlock(&osd->od_osfs_lock);
6093
6094         rc = class_disconnect(exp); /* bz 9811 */
6095
6096         if (rc == 0 && release)
6097                 class_manual_cleanup(obd);
6098         RETURN(rc);
6099 }
6100
6101 static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
6102                        struct lu_device *dev)
6103 {
6104         struct osd_device       *osd    = osd_dev(dev);
6105         struct lr_server_data   *lsd    =
6106                         &osd->od_dt_dev.dd_lu_dev.ld_site->ls_tgt->lut_lsd;
6107         int                      result = 0;
6108         ENTRY;
6109
6110         if (osd->od_quota_slave != NULL) {
6111                 /* set up quota slave objects */
6112                 result = qsd_prepare(env, osd->od_quota_slave);
6113                 if (result != 0)
6114                         RETURN(result);
6115         }
6116
6117         if (lsd->lsd_feature_incompat & OBD_COMPAT_OST) {
6118 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 52, 0)
6119                 if (lsd->lsd_feature_rocompat & OBD_ROCOMPAT_IDX_IN_IDIF) {
6120                         osd->od_index_in_idif = 1;
6121                 } else {
6122                         osd->od_index_in_idif = 0;
6123                         result = osd_register_proc_index_in_idif(osd);
6124                         if (result != 0)
6125                                 RETURN(result);
6126                 }
6127 #else
6128                 osd->od_index_in_idif = 1;
6129 #endif
6130         }
6131
6132         result = osd_fid_init(env, osd);
6133
6134         RETURN(result);
6135 }
6136
6137 static int osd_fid_alloc(const struct lu_env *env, struct obd_export *exp,
6138                          struct lu_fid *fid, struct md_op_data *op_data)
6139 {
6140         struct osd_device *osd = osd_dev(exp->exp_obd->obd_lu_dev);
6141
6142         return seq_client_alloc_fid(env, osd->od_cl_seq, fid);
6143 }
6144
6145 static const struct lu_object_operations osd_lu_obj_ops = {
6146         .loo_object_init      = osd_object_init,
6147         .loo_object_delete    = osd_object_delete,
6148         .loo_object_release   = osd_object_release,
6149         .loo_object_free      = osd_object_free,
6150         .loo_object_print     = osd_object_print,
6151         .loo_object_invariant = osd_object_invariant
6152 };
6153
6154 const struct lu_device_operations osd_lu_ops = {
6155         .ldo_object_alloc      = osd_object_alloc,
6156         .ldo_process_config    = osd_process_config,
6157         .ldo_recovery_complete = osd_recovery_complete,
6158         .ldo_prepare           = osd_prepare,
6159 };
6160
6161 static const struct lu_device_type_operations osd_device_type_ops = {
6162         .ldto_init = osd_type_init,
6163         .ldto_fini = osd_type_fini,
6164
6165         .ldto_start = osd_type_start,
6166         .ldto_stop  = osd_type_stop,
6167
6168         .ldto_device_alloc = osd_device_alloc,
6169         .ldto_device_free  = osd_device_free,
6170
6171         .ldto_device_init    = osd_device_init,
6172         .ldto_device_fini    = osd_device_fini
6173 };
6174
6175 static struct lu_device_type osd_device_type = {
6176         .ldt_tags     = LU_DEVICE_DT,
6177         .ldt_name     = LUSTRE_OSD_LDISKFS_NAME,
6178         .ldt_ops      = &osd_device_type_ops,
6179         .ldt_ctx_tags = LCT_LOCAL,
6180 };
6181
6182 static int osd_health_check(const struct lu_env *env, struct obd_device *obd)
6183 {
6184         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
6185         struct super_block *sb = osd_sb(osd);
6186
6187         return (osd->od_mnt == NULL || sb->s_flags & MS_RDONLY);
6188 }
6189
6190 /*
6191  * lprocfs legacy support.
6192  */
6193 static struct obd_ops osd_obd_device_ops = {
6194         .o_owner = THIS_MODULE,
6195         .o_connect      = osd_obd_connect,
6196         .o_disconnect   = osd_obd_disconnect,
6197         .o_fid_alloc    = osd_fid_alloc,
6198         .o_health_check = osd_health_check,
6199 };
6200
6201 static int __init osd_mod_init(void)
6202 {
6203         int rc;
6204
6205 #if !defined(CONFIG_DEBUG_MUTEXES) && !defined(CONFIG_DEBUG_SPINLOCK)
6206         /* please, try to keep osd_thread_info smaller than a page */
6207         CLASSERT(sizeof(struct osd_thread_info) <= PAGE_SIZE);
6208 #endif
6209
6210         osd_oi_mod_init();
6211
6212         rc = lu_kmem_init(ldiskfs_caches);
6213         if (rc)
6214                 return rc;
6215
6216         rc = class_register_type(&osd_obd_device_ops, NULL, true,
6217                                  lprocfs_osd_module_vars,
6218                                  LUSTRE_OSD_LDISKFS_NAME, &osd_device_type);
6219         if (rc)
6220                 lu_kmem_fini(ldiskfs_caches);
6221         return rc;
6222 }
6223
6224 static void __exit osd_mod_exit(void)
6225 {
6226         class_unregister_type(LUSTRE_OSD_LDISKFS_NAME);
6227         lu_kmem_fini(ldiskfs_caches);
6228 }
6229
6230 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
6231 MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_LDISKFS_NAME")");
6232 MODULE_VERSION(LUSTRE_VERSION_STRING);
6233 MODULE_LICENSE("GPL");
6234
6235 module_init(osd_mod_init);
6236 module_exit(osd_mod_exit);