lustre/osd-ldiskfs/osd_handler.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/osd/osd_handler.c
  37  *
  38  * Top-level entry points into osd module
  39  *
  40  * Author: Nikita Danilov <nikita@clusterfs.com>
  41  *         Pravin Shelar <pravin.shelar@sun.com> : Added fid in dirent
  42  */
  43
  44 #define DEBUG_SUBSYSTEM S_MDS
  45
  46 #include <linux/module.h>
  47
  48 /* LUSTRE_VERSION_CODE */
  49 #include <lustre_ver.h>
  50 /* prerequisite for linux/xattr.h */
  51 #include <linux/types.h>
  52 /* prerequisite for linux/xattr.h */
  53 #include <linux/fs.h>
  54 /* XATTR_{REPLACE,CREATE} */
  55 #include <linux/xattr.h>
  56
  57 /*
  58  * struct OBD_{ALLOC,FREE}*()
  59  * OBD_FAIL_CHECK
  60  */
  61 #include <obd_support.h>
  62 /* struct ptlrpc_thread */
  63 #include <lustre_net.h>
  64 #include <lustre_fid.h>
  65
  66 #include "osd_internal.h"
  67 #include "osd_dynlocks.h"
  68
  69 /* llo_* api support */
  70 #include <md_object.h>
  71 #include <lustre_quota.h>
  72
  73 int ldiskfs_pdo = 1;
  74 CFS_MODULE_PARM(ldiskfs_pdo, "i", int, 0644,
  75                 "ldiskfs with parallel directory operations");
  76
  77 int ldiskfs_track_declares_assert;
  78 CFS_MODULE_PARM(ldiskfs_track_declares_assert, "i", int, 0644,
  79                 "LBUG during tracking of declares");
  80
  81 /* Slab to allocate dynlocks */
  82 struct kmem_cache *dynlock_cachep;
  83
  84 static struct lu_kmem_descr ldiskfs_caches[] = {
  85         {
  86                 .ckd_cache = &dynlock_cachep,
  87                 .ckd_name  = "dynlock_cache",
  88                 .ckd_size  = sizeof(struct dynlock_handle)
  89         },
  90         {
  91                 .ckd_cache = NULL
  92         }
  93 };
  94
  95 static const char dot[] = ".";
  96 static const char dotdot[] = "..";
  97 static const char remote_obj_dir[] = "REM_OBJ_DIR";
  98
  99 static const struct lu_object_operations      osd_lu_obj_ops;
 100 static const struct dt_object_operations      osd_obj_ops;
 101 static const struct dt_object_operations      osd_obj_ea_ops;
 102 static const struct dt_object_operations      osd_obj_otable_it_ops;
 103 static const struct dt_index_operations       osd_index_iam_ops;
 104 static const struct dt_index_operations       osd_index_ea_ops;
 105
 106 int osd_trans_declare_op2rb[] = {
 107         [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
 108         [OSD_OT_PUNCH]          = OSD_OT_MAX,
 109         [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
 110         [OSD_OT_CREATE]         = OSD_OT_DESTROY,
 111         [OSD_OT_DESTROY]        = OSD_OT_CREATE,
 112         [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
 113         [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
 114         [OSD_OT_WRITE]          = OSD_OT_WRITE,
 115         [OSD_OT_INSERT]         = OSD_OT_DELETE,
 116         [OSD_OT_DELETE]         = OSD_OT_INSERT,
 117         [OSD_OT_UPDATE]         = OSD_OT_MAX,
 118         [OSD_OT_QUOTA]          = OSD_OT_MAX,
 119 };
 120
 121 static int osd_has_index(const struct osd_object *obj)
 122 {
 123         return obj->oo_dt.do_index_ops != NULL;
 124 }
 125
 126 static int osd_object_invariant(const struct lu_object *l)
 127 {
 128         return osd_invariant(osd_obj(l));
 129 }
 130
 131 /*
 132  * Concurrency: doesn't matter
 133  */
 134 static int osd_read_locked(const struct lu_env *env, struct osd_object *o)
 135 {
 136         return osd_oti_get(env)->oti_r_locks > 0;
 137 }
 138
 139 /*
 140  * Concurrency: doesn't matter
 141  */
 142 static int osd_write_locked(const struct lu_env *env, struct osd_object *o)
 143 {
 144         struct osd_thread_info *oti = osd_oti_get(env);
 145         return oti->oti_w_locks > 0 && o->oo_owner == env;
 146 }
 147
 148 /*
 149  * Concurrency: doesn't access mutable data
 150  */
 151 static int osd_root_get(const struct lu_env *env,
 152                         struct dt_device *dev, struct lu_fid *f)
 153 {
 154         lu_local_obj_fid(f, OSD_FS_ROOT_OID);
 155         return 0;
 156 }
 157
 158 /*
 159  * OSD object methods.
 160  */
 161
 162 /*
 163  * Concurrency: no concurrent access is possible that early in object
 164  * life-cycle.
 165  */
 166 static struct lu_object *osd_object_alloc(const struct lu_env *env,
 167                                           const struct lu_object_header *hdr,
 168                                           struct lu_device *d)
 169 {
 170         struct osd_object *mo;
 171
 172         OBD_ALLOC_PTR(mo);
 173         if (mo != NULL) {
 174                 struct lu_object *l;
 175
 176                 l = &mo->oo_dt.do_lu;
 177                 dt_object_init(&mo->oo_dt, NULL, d);
 178                 mo->oo_dt.do_ops = &osd_obj_ea_ops;
 179                 l->lo_ops = &osd_lu_obj_ops;
 180                 init_rwsem(&mo->oo_sem);
 181                 init_rwsem(&mo->oo_ext_idx_sem);
 182                 spin_lock_init(&mo->oo_guard);
 183                 return l;
 184         } else {
 185                 return NULL;
 186         }
 187 }
 188
 189 int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
 190                 struct dentry *dentry, struct lustre_mdt_attrs *lma)
 191 {
 192         int rc;
 193
 194         CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
 195         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 196                              info->oti_mdt_attrs_old, LMA_OLD_SIZE);
 197         if (rc > 0) {
 198                 if ((void *)lma != (void *)info->oti_mdt_attrs_old)
 199                         memcpy(lma, info->oti_mdt_attrs_old, sizeof(*lma));
 200                 rc = 0;
 201                 lustre_lma_swab(lma);
 202                 /* Check LMA compatibility */
 203                 if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
 204                         CWARN("%.16s: unsupported incompat LMA feature(s) %#x "
 205                               "for fid = "DFID", ino = %lu\n",
 206                               LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
 207                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 208                               PFID(&lma->lma_self_fid), inode->i_ino);
 209                         rc = -EOPNOTSUPP;
 210                 }
 211         } else if (rc == 0) {
 212                 rc = -ENODATA;
 213         }
 214
 215         return rc;
 216 }
 217
 218 /*
 219  * retrieve object from backend ext fs.
 220  **/
 221 struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
 222                        struct osd_inode_id *id)
 223 {
 224         struct inode *inode = NULL;
 225
 226         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
 227         if (IS_ERR(inode)) {
 228                 CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
 229                        id->oii_ino, PTR_ERR(inode));
 230         } else if (id->oii_gen != OSD_OII_NOGEN &&
 231                    inode->i_generation != id->oii_gen) {
 232                 CDEBUG(D_INODE, "unmatched inode: ino = %u, gen0 = %u, "
 233                        "gen1 = %u\n",
 234                        id->oii_ino, id->oii_gen, inode->i_generation);
 235                 iput(inode);
 236                 inode = ERR_PTR(-ESTALE);
 237         } else if (inode->i_nlink == 0) {
 238                 /* due to parallel readdir and unlink,
 239                 * we can have dead inode here. */
 240                 CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
 241                 make_bad_inode(inode);
 242                 iput(inode);
 243                 inode = ERR_PTR(-ESTALE);
 244         } else if (is_bad_inode(inode)) {
 245                 CWARN("%.16s: bad inode: ino = %u\n",
 246                 LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name, id->oii_ino);
 247                 iput(inode);
 248                 inode = ERR_PTR(-ENOENT);
 249         } else {
 250                 if (id->oii_gen == OSD_OII_NOGEN)
 251                         osd_id_gen(id, inode->i_ino, inode->i_generation);
 252
 253                 /* Do not update file c/mtime in ldiskfs.
 254                  * NB: we don't have any lock to protect this because we don't
 255                  * have reference on osd_object now, but contention with
 256                  * another lookup + attr_set can't happen in the tiny window
 257                  * between if (...) and set S_NOCMTIME. */
 258                 if (!(inode->i_flags & S_NOCMTIME))
 259                         inode->i_flags |= S_NOCMTIME;
 260         }
 261         return inode;
 262 }
 263
 264 static struct inode *
 265 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
 266              struct osd_inode_id *id, struct lu_fid *fid)
 267 {
 268         struct lustre_mdt_attrs *lma   = &info->oti_mdt_attrs;
 269         struct inode            *inode;
 270         int                      rc;
 271
 272         inode = osd_iget(info, dev, id);
 273         if (IS_ERR(inode))
 274                 return inode;
 275
 276         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
 277         if (rc == 0) {
 278                 *fid = lma->lma_self_fid;
 279         } else if (rc == -ENODATA) {
 280                 if (unlikely(inode == osd_sb(dev)->s_root->d_inode))
 281                         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
 282                 else
 283                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 284         } else {
 285                 iput(inode);
 286                 inode = ERR_PTR(rc);
 287         }
 288         return inode;
 289 }
 290
 291 /**
 292  * \retval +v: new filter_fid, does not contain self-fid
 293  * \retval 0:  filter_fid_old, contains self-fid
 294  * \retval -v: other failure cases
 295  */
 296 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
 297                  struct dentry *dentry, struct lu_fid *fid)
 298 {
 299         struct filter_fid_old   *ff     = &info->oti_ff;
 300         struct ost_id           *ostid  = &info->oti_ostid;
 301         int                      rc;
 302
 303         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
 304         if (rc == sizeof(*ff)) {
 305                 rc = 0;
 306                 ostid_set_seq(ostid, le64_to_cpu(ff->ff_seq));
 307                 ostid_set_id(ostid, le64_to_cpu(ff->ff_objid));
 308                 /* XXX: should use real OST index in the future. LU-3569 */
 309                 ostid_to_fid(fid, ostid, 0);
 310         } else if (rc == sizeof(struct filter_fid)) {
 311                 rc = 1;
 312         } else if (rc >= 0) {
 313                 rc = -EINVAL;
 314         }
 315
 316         return rc;
 317 }
 318
 319 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
 320 {
 321         struct osd_thread_info  *info   = osd_oti_get(env);
 322         struct osd_device       *osd    = osd_obj2dev(obj);
 323         struct lustre_mdt_attrs *lma    = &info->oti_mdt_attrs;
 324         struct inode            *inode  = obj->oo_inode;
 325         struct dentry           *dentry = &info->oti_obj_dentry;
 326         struct lu_fid           *fid    = NULL;
 327         int                      rc;
 328         ENTRY;
 329
 330         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_COMPAT_INVALID_ENTRY))
 331                 RETURN(0);
 332
 333         CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
 334         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 335                              info->oti_mdt_attrs_old, LMA_OLD_SIZE);
 336         if (rc == -ENODATA && !fid_is_igif(lu_object_fid(&obj->oo_dt.do_lu)) &&
 337             osd->od_check_ff) {
 338                 fid = &lma->lma_self_fid;
 339                 rc = osd_get_idif(info, inode, dentry, fid);
 340                 if ((rc > 0) || (rc == -ENODATA && osd->od_lma_self_repair)) {
 341                         handle_t *jh;
 342
 343                         /* For the given OST-object, if it has neither LMA nor
 344                          * FID in XATTR_NAME_FID, then the given FID (which is
 345                          * contained in the @obj, from client RPC for locating
 346                          * the OST-object) is trusted. We use it to generate
 347                          * the LMA. */
 348
 349                         LASSERT(current->journal_info == NULL);
 350
 351                         jh = ldiskfs_journal_start_sb(osd_sb(osd),
 352                                         osd_dto_credits_noquota[DTO_XATTR_SET]);
 353                         if (IS_ERR(jh)) {
 354                                 CWARN("%s: cannot start journal for "
 355                                       "lma_self_repair: rc = %ld\n",
 356                                       osd_name(osd), PTR_ERR(jh));
 357                                 RETURN(0);
 358                         }
 359
 360                         rc = osd_ea_fid_set(info, inode,
 361                                 lu_object_fid(&obj->oo_dt.do_lu),
 362                                 fid_is_on_ost(info, osd,
 363                                               lu_object_fid(&obj->oo_dt.do_lu),
 364                                               OI_CHECK_FLD) ?
 365                                 LMAC_FID_ON_OST : 0, 0);
 366                         if (rc != 0)
 367                                 CWARN("%s: cannot self repair the LMA: "
 368                                       "rc = %d\n", osd_name(osd), rc);
 369                         ldiskfs_journal_stop(jh);
 370                         RETURN(0);
 371                 }
 372         }
 373
 374         if (unlikely(rc == -ENODATA))
 375                 RETURN(0);
 376
 377         if (rc < 0)
 378                 RETURN(rc);
 379
 380         if (rc > 0) {
 381                 rc = 0;
 382                 lustre_lma_swab(lma);
 383                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
 384                              CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT))) {
 385                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
 386                               "fid = "DFID", ino = %lu\n", osd_name(osd),
 387                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 388                               PFID(lu_object_fid(&obj->oo_dt.do_lu)),
 389                               inode->i_ino);
 390                         rc = -EOPNOTSUPP;
 391                 } else if (!(lma->lma_compat & LMAC_NOT_IN_OI)) {
 392                         fid = &lma->lma_self_fid;
 393                 }
 394         }
 395
 396         if (fid != NULL &&
 397             unlikely(!lu_fid_eq(lu_object_fid(&obj->oo_dt.do_lu), fid))) {
 398                 CDEBUG(D_INODE, "%s: FID "DFID" != self_fid "DFID"\n",
 399                        osd_name(osd), PFID(lu_object_fid(&obj->oo_dt.do_lu)),
 400                        PFID(&lma->lma_self_fid));
 401                 rc = -EREMCHG;
 402         }
 403
 404         RETURN(rc);
 405 }
 406
 407 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
 408                           const struct lu_fid *fid,
 409                           const struct lu_object_conf *conf)
 410 {
 411         struct osd_thread_info *info;
 412         struct lu_device       *ldev   = obj->oo_dt.do_lu.lo_dev;
 413         struct osd_device      *dev;
 414         struct osd_idmap_cache *oic;
 415         struct osd_inode_id    *id;
 416         struct inode           *inode;
 417         struct osd_scrub       *scrub;
 418         struct scrub_file      *sf;
 419         int                     result;
 420         int                     saved  = 0;
 421         bool                    in_oi  = false;
 422         bool                    triggered = false;
 423         ENTRY;
 424
 425         LINVRNT(osd_invariant(obj));
 426         LASSERT(obj->oo_inode == NULL);
 427         LASSERTF(fid_is_sane(fid) || fid_is_idif(fid), DFID, PFID(fid));
 428
 429         dev = osd_dev(ldev);
 430         scrub = &dev->od_scrub;
 431         sf = &scrub->os_file;
 432         info = osd_oti_get(env);
 433         LASSERT(info);
 434         oic = &info->oti_cache;
 435
 436         if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
 437                 RETURN(-ENOENT);
 438
 439         /* For the object is created as locking anchor, or for the object to
 440          * be created on disk. No need to osd_oi_lookup() at here because FID
 441          * shouldn't never be re-used, if it's really a duplicate FID from
 442          * unexpected reason, we should be able to detect it later by calling
 443          * do_create->osd_oi_insert(). */
 444         if (conf != NULL && conf->loc_flags & LOC_F_NEW)
 445                 GOTO(out, result = 0);
 446
 447         /* Search order: 1. per-thread cache. */
 448         if (lu_fid_eq(fid, &oic->oic_fid) &&
 449             likely(oic->oic_dev == dev)) {
 450                 id = &oic->oic_lid;
 451                 goto iget;
 452         }
 453
 454         id = &info->oti_id;
 455         if (!cfs_list_empty(&scrub->os_inconsistent_items)) {
 456                 /* Search order: 2. OI scrub pending list. */
 457                 result = osd_oii_lookup(dev, fid, id);
 458                 if (result == 0)
 459                         goto iget;
 460         }
 461
 462         /* Search order: 3. OI files. */
 463         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
 464         if (result == -ENOENT) {
 465                 if (!fid_is_norm(fid) ||
 466                     fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
 467                     !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
 468                                       sf->sf_oi_bitmap))
 469                         GOTO(out, result = 0);
 470
 471                 goto trigger;
 472         }
 473
 474         if (result != 0)
 475                 GOTO(out, result);
 476
 477         in_oi = true;
 478
 479 iget:
 480         inode = osd_iget(info, dev, id);
 481         if (IS_ERR(inode)) {
 482                 result = PTR_ERR(inode);
 483                 if (result == -ENOENT || result == -ESTALE) {
 484                         if (!in_oi) {
 485                                 fid_zero(&oic->oic_fid);
 486                                 GOTO(out, result = -ENOENT);
 487                         }
 488
 489                         /* XXX: There are three possible cases:
 490                          *      1. Backup/restore caused the OI invalid.
 491                          *      2. Someone unlinked the object but NOT removed
 492                          *         the OI mapping, such as mount target device
 493                          *         as ldiskfs, and modify something directly.
 494                          *      3. Someone just removed the object between the
 495                          *         former oi_lookup and the iget. It is normal.
 496                          *
 497                          *      It is diffcult to distinguish the 2nd from the
 498                          *      1st case. Relatively speaking, the 1st case is
 499                          *      common than the 2nd case, trigger OI scrub. */
 500                         result = osd_oi_lookup(info, dev, fid, id, true);
 501                         if (result == 0)
 502                                 /* It is the case 1 or 2. */
 503                                 goto trigger;
 504                 } else if (result == -EREMCHG) {
 505
 506 trigger:
 507                         if (unlikely(triggered))
 508                                 GOTO(out, result = saved);
 509
 510                         triggered = true;
 511                         if (thread_is_running(&scrub->os_thread)) {
 512                                 result = -EINPROGRESS;
 513                         } else if (!dev->od_noscrub) {
 514                                 result = osd_scrub_start(dev);
 515                                 LCONSOLE_ERROR("%.16s: trigger OI scrub by RPC "
 516                                                "for "DFID", rc = %d [1]\n",
 517                                                LDISKFS_SB(osd_sb(dev))->s_es->\
 518                                                s_volume_name,PFID(fid), result);
 519                                 if (result == 0 || result == -EALREADY)
 520                                         result = -EINPROGRESS;
 521                                 else
 522                                         result = -EREMCHG;
 523                         }
 524
 525                         /* We still have chance to get the valid inode: for the
 526                          * object which is referenced by remote name entry, the
 527                          * object on the local MDT will be linked under the dir
 528                          * of "/REMOTE_PARENT_DIR" with its FID string as name.
 529                          *
 530                          * We do not know whether the object for the given FID
 531                          * is referenced by some remote name entry or not, and
 532                          * especially for DNE II, a multiple-linked object may
 533                          * have many name entries reside on many MDTs.
 534                          *
 535                          * To simplify the operation, OSD will not distinguish
 536                          * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
 537                          * only happened for the RPC from other MDT during the
 538                          * OI scrub, or for the client side RPC with FID only,
 539                          * such as FID to path, or from old connected client. */
 540                         saved = result;
 541                         result = osd_lookup_in_remote_parent(info, dev,
 542                                                              fid, id);
 543                         if (result == 0) {
 544                                 in_oi = false;
 545                                 goto iget;
 546                         }
 547
 548                         result = saved;
 549                 }
 550
 551                 GOTO(out, result);
 552         }
 553
 554         obj->oo_inode = inode;
 555         LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
 556
 557         result = osd_check_lma(env, obj);
 558         if (result != 0) {
 559                 iput(inode);
 560                 obj->oo_inode = NULL;
 561                 if (result == -EREMCHG)
 562                         goto trigger;
 563
 564                 GOTO(out, result);
 565         }
 566
 567         obj->oo_compat_dot_created = 1;
 568         obj->oo_compat_dotdot_created = 1;
 569
 570         if (!S_ISDIR(inode->i_mode) || !ldiskfs_pdo) /* done */
 571                 GOTO(out, result = 0);
 572
 573         LASSERT(obj->oo_hl_head == NULL);
 574         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
 575         if (obj->oo_hl_head == NULL) {
 576                 obj->oo_inode = NULL;
 577                 iput(inode);
 578                 GOTO(out, result = -ENOMEM);
 579         }
 580         GOTO(out, result = 0);
 581
 582 out:
 583         LINVRNT(osd_invariant(obj));
 584         return result;
 585 }
 586
 587 /*
 588  * Concurrency: shouldn't matter.
 589  */
 590 static void osd_object_init0(struct osd_object *obj)
 591 {
 592         LASSERT(obj->oo_inode != NULL);
 593         obj->oo_dt.do_body_ops = &osd_body_ops;
 594         obj->oo_dt.do_lu.lo_header->loh_attr |=
 595                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
 596 }
 597
 598 /*
 599  * Concurrency: no concurrent access is possible that early in object
 600  * life-cycle.
 601  */
 602 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
 603                            const struct lu_object_conf *conf)
 604 {
 605         struct osd_object *obj = osd_obj(l);
 606         int result;
 607
 608         LINVRNT(osd_invariant(obj));
 609
 610         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
 611                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
 612                 l->lo_header->loh_attr |= LOHA_EXISTS;
 613                 return 0;
 614         }
 615
 616         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
 617         obj->oo_dt.do_body_ops = &osd_body_ops_new;
 618         if (result == 0 && obj->oo_inode != NULL)
 619                 osd_object_init0(obj);
 620
 621         LINVRNT(osd_invariant(obj));
 622         return result;
 623 }
 624
 625 /*
 626  * Concurrency: no concurrent access is possible that late in object
 627  * life-cycle.
 628  */
 629 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
 630 {
 631         struct osd_object *obj = osd_obj(l);
 632
 633         LINVRNT(osd_invariant(obj));
 634
 635         dt_object_fini(&obj->oo_dt);
 636         if (obj->oo_hl_head != NULL)
 637                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
 638         OBD_FREE_PTR(obj);
 639 }
 640
 641 /*
 642  * Concurrency: no concurrent access is possible that late in object
 643  * life-cycle.
 644  */
 645 static void osd_index_fini(struct osd_object *o)
 646 {
 647         struct iam_container *bag;
 648
 649         if (o->oo_dir != NULL) {
 650                 bag = &o->oo_dir->od_container;
 651                 if (o->oo_inode != NULL) {
 652                         if (bag->ic_object == o->oo_inode)
 653                                 iam_container_fini(bag);
 654                 }
 655                 OBD_FREE_PTR(o->oo_dir);
 656                 o->oo_dir = NULL;
 657         }
 658 }
 659
 660 /*
 661  * Concurrency: no concurrent access is possible that late in object
 662  * life-cycle (for all existing callers, that is. New callers have to provide
 663  * their own locking.)
 664  */
 665 static int osd_inode_unlinked(const struct inode *inode)
 666 {
 667         return inode->i_nlink == 0;
 668 }
 669
 670 enum {
 671         OSD_TXN_OI_DELETE_CREDITS    = 20,
 672         OSD_TXN_INODE_DELETE_CREDITS = 20
 673 };
 674
 675 /*
 676  * Journal
 677  */
 678
 679 #if OSD_THANDLE_STATS
 680 /**
 681  * Set time when the handle is allocated
 682  */
 683 static void osd_th_alloced(struct osd_thandle *oth)
 684 {
 685         oth->oth_alloced = cfs_time_current();
 686 }
 687
 688 /**
 689  * Set time when the handle started
 690  */
 691 static void osd_th_started(struct osd_thandle *oth)
 692 {
 693         oth->oth_started = cfs_time_current();
 694 }
 695
 696 /**
 697  * Helper function to convert time interval to microseconds packed in
 698  * long int.
 699  */
 700 static long interval_to_usec(cfs_time_t start, cfs_time_t end)
 701 {
 702         struct timeval val;
 703
 704         cfs_duration_usec(cfs_time_sub(end, start), &val);
 705         return val.tv_sec * 1000000 + val.tv_usec;
 706 }
 707
 708 /**
 709  * Check whether the we deal with this handle for too long.
 710  */
 711 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
 712                                 cfs_time_t alloced, cfs_time_t started,
 713                                 cfs_time_t closed)
 714 {
 715         cfs_time_t now = cfs_time_current();
 716
 717         LASSERT(dev != NULL);
 718
 719         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
 720                             interval_to_usec(alloced, started));
 721         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
 722                             interval_to_usec(started, closed));
 723         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
 724                             interval_to_usec(closed, now));
 725
 726         if (cfs_time_before(cfs_time_add(alloced, cfs_time_seconds(30)), now)) {
 727                 CWARN("transaction handle %p was open for too long: "
 728                       "now "CFS_TIME_T" ,"
 729                       "alloced "CFS_TIME_T" ,"
 730                       "started "CFS_TIME_T" ,"
 731                       "closed "CFS_TIME_T"\n",
 732                       oth, now, alloced, started, closed);
 733                 libcfs_debug_dumpstack(NULL);
 734         }
 735 }
 736
 737 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
 738 {                                                                       \
 739         cfs_time_t __closed = cfs_time_current();                       \
 740         cfs_time_t __alloced = oth->oth_alloced;                        \
 741         cfs_time_t __started = oth->oth_started;                        \
 742                                                                         \
 743         expr;                                                           \
 744         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
 745 }
 746
 747 #else /* OSD_THANDLE_STATS */
 748
 749 #define osd_th_alloced(h)                  do {} while(0)
 750 #define osd_th_started(h)                  do {} while(0)
 751 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
 752
 753 #endif /* OSD_THANDLE_STATS */
 754
 755 /*
 756  * Concurrency: doesn't access mutable data.
 757  */
 758 static int osd_param_is_not_sane(const struct osd_device *dev,
 759                                  const struct thandle *th)
 760 {
 761         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
 762
 763         return oh->ot_credits > osd_journal(dev)->j_max_transaction_buffers;
 764 }
 765
 766 /*
 767  * Concurrency: shouldn't matter.
 768  */
 769 static void osd_trans_commit_cb(struct super_block *sb,
 770                                 struct ldiskfs_journal_cb_entry *jcb, int error)
 771 {
 772         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
 773         struct thandle     *th  = &oh->ot_super;
 774         struct lu_device   *lud = &th->th_dev->dd_lu_dev;
 775         struct dt_txn_commit_cb *dcb, *tmp;
 776
 777         LASSERT(oh->ot_handle == NULL);
 778
 779         if (error)
 780                 CERROR("transaction @0x%p commit error: %d\n", th, error);
 781
 782         dt_txn_hook_commit(th);
 783
 784         /* call per-transaction callbacks if any */
 785         cfs_list_for_each_entry_safe(dcb, tmp, &oh->ot_dcb_list, dcb_linkage) {
 786                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
 787                          "commit callback entry: magic=%x name='%s'\n",
 788                          dcb->dcb_magic, dcb->dcb_name);
 789                 cfs_list_del_init(&dcb->dcb_linkage);
 790                 dcb->dcb_func(NULL, th, dcb, error);
 791         }
 792
 793         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
 794         lu_device_put(lud);
 795         th->th_dev = NULL;
 796
 797         lu_context_exit(&th->th_ctx);
 798         lu_context_fini(&th->th_ctx);
 799         OBD_FREE_PTR(oh);
 800 }
 801
 802 static struct thandle *osd_trans_create(const struct lu_env *env,
 803                                         struct dt_device *d)
 804 {
 805         struct osd_thread_info *oti = osd_oti_get(env);
 806         struct osd_iobuf       *iobuf = &oti->oti_iobuf;
 807         struct osd_thandle     *oh;
 808         struct thandle         *th;
 809         ENTRY;
 810
 811         /* on pending IO in this thread should left from prev. request */
 812         LASSERT(cfs_atomic_read(&iobuf->dr_numreqs) == 0);
 813
 814         th = ERR_PTR(-ENOMEM);
 815         OBD_ALLOC_GFP(oh, sizeof *oh, __GFP_IO);
 816         if (oh != NULL) {
 817                 oh->ot_quota_trans = &oti->oti_quota_trans;
 818                 memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
 819                 th = &oh->ot_super;
 820                 th->th_dev = d;
 821                 th->th_result = 0;
 822                 th->th_tags = LCT_TX_HANDLE;
 823                 oh->ot_credits = 0;
 824                 oti->oti_dev = osd_dt_dev(d);
 825                 CFS_INIT_LIST_HEAD(&oh->ot_dcb_list);
 826                 osd_th_alloced(oh);
 827
 828                 memset(oti->oti_declare_ops, 0,
 829                                         sizeof(oti->oti_declare_ops));
 830                 memset(oti->oti_declare_ops_rb, 0,
 831                                         sizeof(oti->oti_declare_ops_rb));
 832                 memset(oti->oti_declare_ops_cred, 0,
 833                                         sizeof(oti->oti_declare_ops_cred));
 834                 oti->oti_rollback = false;
 835         }
 836         RETURN(th);
 837 }
 838
 839 /*
 840  * Concurrency: shouldn't matter.
 841  */
 842 int osd_trans_start(const struct lu_env *env, struct dt_device *d,
 843                     struct thandle *th)
 844 {
 845         struct osd_thread_info *oti = osd_oti_get(env);
 846         struct osd_device  *dev = osd_dt_dev(d);
 847         handle_t           *jh;
 848         struct osd_thandle *oh;
 849         int rc;
 850
 851         ENTRY;
 852
 853         LASSERT(current->journal_info == NULL);
 854
 855         oh = container_of0(th, struct osd_thandle, ot_super);
 856         LASSERT(oh != NULL);
 857         LASSERT(oh->ot_handle == NULL);
 858
 859         rc = dt_txn_hook_start(env, d, th);
 860         if (rc != 0)
 861                 GOTO(out, rc);
 862
 863         if (unlikely(osd_param_is_not_sane(dev, th))) {
 864                 static unsigned long last_printed;
 865                 static int last_credits;
 866
 867                 CWARN("%.16s: too many transaction credits (%d > %d)\n",
 868                       LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
 869                       oh->ot_credits,
 870                       osd_journal(dev)->j_max_transaction_buffers);
 871                 CWARN("  create: %u/%u, delete: %u/%u, destroy: %u/%u\n",
 872                       oti->oti_declare_ops[OSD_OT_CREATE],
 873                       oti->oti_declare_ops_cred[OSD_OT_CREATE],
 874                       oti->oti_declare_ops[OSD_OT_DELETE],
 875                       oti->oti_declare_ops_cred[OSD_OT_DELETE],
 876                       oti->oti_declare_ops[OSD_OT_DESTROY],
 877                       oti->oti_declare_ops_cred[OSD_OT_DESTROY]);
 878                 CWARN("  attr_set: %u/%u, xattr_set: %u/%u\n",
 879                       oti->oti_declare_ops[OSD_OT_ATTR_SET],
 880                       oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
 881                       oti->oti_declare_ops[OSD_OT_XATTR_SET],
 882                       oti->oti_declare_ops_cred[OSD_OT_XATTR_SET]);
 883                 CWARN("  write: %u/%u, punch: %u/%u, quota %u/%u\n",
 884                       oti->oti_declare_ops[OSD_OT_WRITE],
 885                       oti->oti_declare_ops_cred[OSD_OT_WRITE],
 886                       oti->oti_declare_ops[OSD_OT_PUNCH],
 887                       oti->oti_declare_ops_cred[OSD_OT_PUNCH],
 888                       oti->oti_declare_ops[OSD_OT_QUOTA],
 889                       oti->oti_declare_ops_cred[OSD_OT_QUOTA]);
 890                 CWARN("  insert: %u/%u, delete: %u/%u\n",
 891                       oti->oti_declare_ops[OSD_OT_INSERT],
 892                       oti->oti_declare_ops_cred[OSD_OT_INSERT],
 893                       oti->oti_declare_ops[OSD_OT_DESTROY],
 894                       oti->oti_declare_ops_cred[OSD_OT_DESTROY]);
 895                 CWARN("  ref_add: %u/%u, ref_del: %u/%u\n",
 896                       oti->oti_declare_ops[OSD_OT_REF_ADD],
 897                       oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
 898                       oti->oti_declare_ops[OSD_OT_REF_DEL],
 899                       oti->oti_declare_ops_cred[OSD_OT_REF_DEL]);
 900
 901                 if (last_credits != oh->ot_credits &&
 902                     time_after(jiffies, last_printed + 60 * HZ)) {
 903                         libcfs_debug_dumpstack(NULL);
 904                         last_credits = oh->ot_credits;
 905                         last_printed = jiffies;
 906                 }
 907                 /* XXX Limit the credits to 'max_transaction_buffers', and
 908                  *     let the underlying filesystem to catch the error if
 909                  *     we really need so many credits.
 910                  *
 911                  *     This should be removed when we can calculate the
 912                  *     credits precisely. */
 913                 oh->ot_credits = osd_journal(dev)->j_max_transaction_buffers;
 914         }
 915
 916         /*
 917          * XXX temporary stuff. Some abstraction layer should
 918          * be used.
 919          */
 920         jh = ldiskfs_journal_start_sb(osd_sb(dev), oh->ot_credits);
 921         osd_th_started(oh);
 922         if (!IS_ERR(jh)) {
 923                 oh->ot_handle = jh;
 924                 LASSERT(oti->oti_txns == 0);
 925                 lu_context_init(&th->th_ctx, th->th_tags);
 926                 lu_context_enter(&th->th_ctx);
 927
 928                 lu_device_get(&d->dd_lu_dev);
 929                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
 930                               "osd-tx", th);
 931                 oti->oti_txns++;
 932                 rc = 0;
 933         } else {
 934                 rc = PTR_ERR(jh);
 935         }
 936 out:
 937         RETURN(rc);
 938 }
 939
 940 /*
 941  * Concurrency: shouldn't matter.
 942  */
 943 static int osd_trans_stop(const struct lu_env *env, struct thandle *th)
 944 {
 945         int                     rc = 0;
 946         struct osd_thandle     *oh;
 947         struct osd_thread_info *oti = osd_oti_get(env);
 948         struct osd_iobuf       *iobuf = &oti->oti_iobuf;
 949         struct qsd_instance    *qsd = oti->oti_dev->od_quota_slave;
 950         ENTRY;
 951
 952         oh = container_of0(th, struct osd_thandle, ot_super);
 953
 954         if (qsd != NULL)
 955                 /* inform the quota slave device that the transaction is
 956                  * stopping */
 957                 qsd_op_end(env, qsd, oh->ot_quota_trans);
 958         oh->ot_quota_trans = NULL;
 959
 960         if (oh->ot_handle != NULL) {
 961                 handle_t *hdl = oh->ot_handle;
 962
 963                 /*
 964                  * add commit callback
 965                  * notice we don't do this in osd_trans_start()
 966                  * as underlying transaction can change during truncate
 967                  */
 968                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
 969                                          &oh->ot_jcb);
 970
 971                 LASSERT(oti->oti_txns == 1);
 972                 oti->oti_txns--;
 973                 rc = dt_txn_hook_stop(env, th);
 974                 if (rc != 0)
 975                         CERROR("Failure in transaction hook: %d\n", rc);
 976
 977                 /* hook functions might modify th_sync */
 978                 hdl->h_sync = th->th_sync;
 979
 980                 oh->ot_handle = NULL;
 981                 OSD_CHECK_SLOW_TH(oh, oti->oti_dev,
 982                                   rc = ldiskfs_journal_stop(hdl));
 983                 if (rc != 0)
 984                         CERROR("Failure to stop transaction: %d\n", rc);
 985         } else {
 986                 OBD_FREE_PTR(oh);
 987         }
 988
 989         /* as we want IO to journal and data IO be concurrent, we don't block
 990          * awaiting data IO completion in osd_do_bio(), instead we wait here
 991          * once transaction is submitted to the journal. all reqular requests
 992          * don't do direct IO (except read/write), thus this wait_event becomes
 993          * no-op for them.
 994          *
 995          * IMPORTANT: we have to wait till any IO submited by the thread is
 996          * completed otherwise iobuf may be corrupted by different request
 997          */
 998         wait_event(iobuf->dr_wait,
 999                        cfs_atomic_read(&iobuf->dr_numreqs) == 0);
1000         if (!rc)
1001                 rc = iobuf->dr_error;
1002
1003         RETURN(rc);
1004 }
1005
1006 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
1007 {
1008         struct osd_thandle *oh = container_of0(th, struct osd_thandle,
1009                                                ot_super);
1010
1011         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
1012         LASSERT(&dcb->dcb_func != NULL);
1013         cfs_list_add(&dcb->dcb_linkage, &oh->ot_dcb_list);
1014
1015         return 0;
1016 }
1017
1018 /*
1019  * Called just before object is freed. Releases all resources except for
1020  * object itself (that is released by osd_object_free()).
1021  *
1022  * Concurrency: no concurrent access is possible that late in object
1023  * life-cycle.
1024  */
1025 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
1026 {
1027         struct osd_object *obj   = osd_obj(l);
1028         struct inode      *inode = obj->oo_inode;
1029
1030         LINVRNT(osd_invariant(obj));
1031
1032         /*
1033          * If object is unlinked remove fid->ino mapping from object index.
1034          */
1035
1036         osd_index_fini(obj);
1037         if (inode != NULL) {
1038                 struct qsd_instance     *qsd = osd_obj2dev(obj)->od_quota_slave;
1039                 qid_t                    uid = inode->i_uid;
1040                 qid_t                    gid = inode->i_gid;
1041
1042                 iput(inode);
1043                 obj->oo_inode = NULL;
1044
1045                 if (qsd != NULL) {
1046                         struct osd_thread_info  *info = osd_oti_get(env);
1047                         struct lquota_id_info   *qi = &info->oti_qi;
1048
1049                         /* Release granted quota to master if necessary */
1050                         qi->lqi_id.qid_uid = uid;
1051                         qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
1052
1053                         qi->lqi_id.qid_uid = gid;
1054                         qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
1055                 }
1056         }
1057 }
1058
1059 /*
1060  * Concurrency: ->loo_object_release() is called under site spin-lock.
1061  */
1062 static void osd_object_release(const struct lu_env *env,
1063                                struct lu_object *l)
1064 {
1065 }
1066
1067 /*
1068  * Concurrency: shouldn't matter.
1069  */
1070 static int osd_object_print(const struct lu_env *env, void *cookie,
1071                             lu_printer_t p, const struct lu_object *l)
1072 {
1073         struct osd_object *o = osd_obj(l);
1074         struct iam_descr  *d;
1075
1076         if (o->oo_dir != NULL)
1077                 d = o->oo_dir->od_container.ic_descr;
1078         else
1079                 d = NULL;
1080         return (*p)(env, cookie,
1081                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
1082                     o, o->oo_inode,
1083                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
1084                     o->oo_inode ? o->oo_inode->i_generation : 0,
1085                     d ? d->id_ops->id_name : "plain");
1086 }
1087
1088 /*
1089  * Concurrency: shouldn't matter.
1090  */
1091 int osd_statfs(const struct lu_env *env, struct dt_device *d,
1092                struct obd_statfs *sfs)
1093 {
1094         struct osd_device  *osd = osd_dt_dev(d);
1095         struct super_block *sb = osd_sb(osd);
1096         struct kstatfs     *ksfs;
1097         int result = 0;
1098
1099         if (unlikely(osd->od_mnt == NULL))
1100                 return -EINPROGRESS;
1101
1102         /* osd_lproc.c call this without env, allocate ksfs for that case */
1103         if (unlikely(env == NULL)) {
1104                 OBD_ALLOC_PTR(ksfs);
1105                 if (ksfs == NULL)
1106                         return -ENOMEM;
1107         } else {
1108                 ksfs = &osd_oti_get(env)->oti_ksfs;
1109         }
1110
1111         spin_lock(&osd->od_osfs_lock);
1112         /* cache 1 second */
1113         if (cfs_time_before_64(osd->od_osfs_age, cfs_time_shift_64(-1))) {
1114                 result = sb->s_op->statfs(sb->s_root, ksfs);
1115                 if (likely(result == 0)) { /* N.B. statfs can't really fail */
1116                         osd->od_osfs_age = cfs_time_current_64();
1117                         statfs_pack(&osd->od_statfs, ksfs);
1118                         if (sb->s_flags & MS_RDONLY)
1119                                 sfs->os_state = OS_STATE_READONLY;
1120                 }
1121         }
1122
1123         if (likely(result == 0))
1124                 *sfs = osd->od_statfs;
1125         spin_unlock(&osd->od_osfs_lock);
1126
1127         if (unlikely(env == NULL))
1128                 OBD_FREE_PTR(ksfs);
1129
1130         return result;
1131 }
1132
1133 /**
1134  * Estimate space needed for file creations. We assume the largest filename
1135  * which is 2^64 - 1, hence a filename of 20 chars.
1136  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
1137  */
1138 #ifdef __LDISKFS_DIR_REC_LEN
1139 #define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
1140 #else
1141 #define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
1142 #endif
1143
1144 /*
1145  * Concurrency: doesn't access mutable data.
1146  */
1147 static void osd_conf_get(const struct lu_env *env,
1148                          const struct dt_device *dev,
1149                          struct dt_device_param *param)
1150 {
1151         struct super_block *sb = osd_sb(osd_dt_dev(dev));
1152
1153         /*
1154          * XXX should be taken from not-yet-existing fs abstraction layer.
1155          */
1156         param->ddp_max_name_len = LDISKFS_NAME_LEN;
1157         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
1158         param->ddp_block_shift  = sb->s_blocksize_bits;
1159         param->ddp_mount_type     = LDD_MT_LDISKFS;
1160         param->ddp_maxbytes       = sb->s_maxbytes;
1161         /* Overhead estimate should be fairly accurate, so we really take a tiny
1162          * error margin which also avoids fragmenting the filesystem too much */
1163         param->ddp_grant_reserved = 2; /* end up to be 1.9% after conversion */
1164         /* inode are statically allocated, so per-inode space consumption
1165          * is the space consumed by the directory entry */
1166         param->ddp_inodespace     = PER_OBJ_USAGE;
1167         /* per-fragment overhead to be used by the client code */
1168         param->ddp_grant_frag     = 6 * LDISKFS_BLOCK_SIZE(sb);
1169         param->ddp_mntopts      = 0;
1170         if (test_opt(sb, XATTR_USER))
1171                 param->ddp_mntopts |= MNTOPT_USERXATTR;
1172         if (test_opt(sb, POSIX_ACL))
1173                 param->ddp_mntopts |= MNTOPT_ACL;
1174
1175 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
1176         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EA_INODE))
1177                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE;
1178         else
1179 #endif
1180                 param->ddp_max_ea_size = sb->s_blocksize;
1181
1182 }
1183
1184 /*
1185  * Concurrency: shouldn't matter.
1186  */
1187 static int osd_sync(const struct lu_env *env, struct dt_device *d)
1188 {
1189         CDEBUG(D_HA, "syncing OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
1190         return ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
1191 }
1192
1193 /**
1194  * Start commit for OSD device.
1195  *
1196  * An implementation of dt_commit_async method for OSD device.
1197  * Asychronously starts underlayng fs sync and thereby a transaction
1198  * commit.
1199  *
1200  * \param env environment
1201  * \param d dt device
1202  *
1203  * \see dt_device_operations
1204  */
1205 static int osd_commit_async(const struct lu_env *env,
1206                             struct dt_device *d)
1207 {
1208         struct super_block *s = osd_sb(osd_dt_dev(d));
1209         ENTRY;
1210
1211         CDEBUG(D_HA, "async commit OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
1212         RETURN(s->s_op->sync_fs(s, 0));
1213 }
1214
1215 /*
1216  * Concurrency: shouldn't matter.
1217  */
1218
1219 static int osd_ro(const struct lu_env *env, struct dt_device *d)
1220 {
1221         struct super_block *sb = osd_sb(osd_dt_dev(d));
1222         struct block_device *dev = sb->s_bdev;
1223 #ifdef HAVE_DEV_SET_RDONLY
1224         struct block_device *jdev = LDISKFS_SB(sb)->journal_bdev;
1225         int rc = 0;
1226 #else
1227         int rc = -EOPNOTSUPP;
1228 #endif
1229         ENTRY;
1230
1231 #ifdef HAVE_DEV_SET_RDONLY
1232         CERROR("*** setting %s read-only ***\n", osd_dt_dev(d)->od_svname);
1233
1234         if (jdev && (jdev != dev)) {
1235                 CDEBUG(D_IOCTL | D_HA, "set journal dev %lx rdonly\n",
1236                        (long)jdev);
1237                 dev_set_rdonly(jdev);
1238         }
1239         CDEBUG(D_IOCTL | D_HA, "set dev %lx rdonly\n", (long)dev);
1240         dev_set_rdonly(dev);
1241 #else
1242         CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
1243                osd_dt_dev(d)->od_svname, (long)dev, rc);
1244 #endif
1245         RETURN(rc);
1246 }
1247
1248 /*
1249  * Concurrency: serialization provided by callers.
1250  */
1251 static int osd_init_capa_ctxt(const struct lu_env *env, struct dt_device *d,
1252                               int mode, unsigned long timeout, __u32 alg,
1253                               struct lustre_capa_key *keys)
1254 {
1255         struct osd_device *dev = osd_dt_dev(d);
1256         ENTRY;
1257
1258         dev->od_fl_capa = mode;
1259         dev->od_capa_timeout = timeout;
1260         dev->od_capa_alg = alg;
1261         dev->od_capa_keys = keys;
1262         RETURN(0);
1263 }
1264
1265 /**
1266  * Note: we do not count into QUOTA here.
1267  * If we mount with --data_journal we may need more.
1268  */
1269 const int osd_dto_credits_noquota[DTO_NR] = {
1270         /**
1271          * Insert/Delete.
1272          * INDEX_EXTRA_TRANS_BLOCKS(8) +
1273          * SINGLEDATA_TRANS_BLOCKS(8)
1274          * XXX Note: maybe iam need more, since iam have more level than
1275          *           EXT3 htree.
1276          */
1277         [DTO_INDEX_INSERT]  = 16,
1278         [DTO_INDEX_DELETE]  = 16,
1279         /**
1280          * Used for OI scrub
1281          */
1282         [DTO_INDEX_UPDATE]  = 16,
1283         /**
1284          * Create a object. The same as create object in EXT3.
1285          * DATA_TRANS_BLOCKS(14) +
1286          * INDEX_EXTRA_BLOCKS(8) +
1287          * 3(inode bits, groups, GDT)
1288          */
1289         [DTO_OBJECT_CREATE] = 25,
1290         /**
1291          * XXX: real credits to be fixed
1292          */
1293         [DTO_OBJECT_DELETE] = 25,
1294         /**
1295          * Attr set credits (inode)
1296          */
1297         [DTO_ATTR_SET_BASE] = 1,
1298         /**
1299          * Xattr set. The same as xattr of EXT3.
1300          * DATA_TRANS_BLOCKS(14)
1301          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
1302          * are also counted in. Do not know why?
1303          */
1304         [DTO_XATTR_SET]     = 14,
1305         [DTO_LOG_REC]       = 14,
1306         /**
1307          * credits for inode change during write.
1308          */
1309         [DTO_WRITE_BASE]    = 3,
1310         /**
1311          * credits for single block write.
1312          */
1313         [DTO_WRITE_BLOCK]   = 14,
1314         /**
1315          * Attr set credits for chown.
1316          * This is extra credits for setattr, and it is null without quota
1317          */
1318         [DTO_ATTR_SET_CHOWN]= 0
1319 };
1320
1321 static const struct dt_device_operations osd_dt_ops = {
1322         .dt_root_get       = osd_root_get,
1323         .dt_statfs         = osd_statfs,
1324         .dt_trans_create   = osd_trans_create,
1325         .dt_trans_start    = osd_trans_start,
1326         .dt_trans_stop     = osd_trans_stop,
1327         .dt_trans_cb_add   = osd_trans_cb_add,
1328         .dt_conf_get       = osd_conf_get,
1329         .dt_sync           = osd_sync,
1330         .dt_ro             = osd_ro,
1331         .dt_commit_async   = osd_commit_async,
1332         .dt_init_capa_ctxt = osd_init_capa_ctxt,
1333 };
1334
1335 static void osd_object_read_lock(const struct lu_env *env,
1336                                  struct dt_object *dt, unsigned role)
1337 {
1338         struct osd_object *obj = osd_dt_obj(dt);
1339         struct osd_thread_info *oti = osd_oti_get(env);
1340
1341         LINVRNT(osd_invariant(obj));
1342
1343         LASSERT(obj->oo_owner != env);
1344         down_read_nested(&obj->oo_sem, role);
1345
1346         LASSERT(obj->oo_owner == NULL);
1347         oti->oti_r_locks++;
1348 }
1349
1350 static void osd_object_write_lock(const struct lu_env *env,
1351                                   struct dt_object *dt, unsigned role)
1352 {
1353         struct osd_object *obj = osd_dt_obj(dt);
1354         struct osd_thread_info *oti = osd_oti_get(env);
1355
1356         LINVRNT(osd_invariant(obj));
1357
1358         LASSERT(obj->oo_owner != env);
1359         down_write_nested(&obj->oo_sem, role);
1360
1361         LASSERT(obj->oo_owner == NULL);
1362         obj->oo_owner = env;
1363         oti->oti_w_locks++;
1364 }
1365
1366 static void osd_object_read_unlock(const struct lu_env *env,
1367                                    struct dt_object *dt)
1368 {
1369         struct osd_object *obj = osd_dt_obj(dt);
1370         struct osd_thread_info *oti = osd_oti_get(env);
1371
1372         LINVRNT(osd_invariant(obj));
1373
1374         LASSERT(oti->oti_r_locks > 0);
1375         oti->oti_r_locks--;
1376         up_read(&obj->oo_sem);
1377 }
1378
1379 static void osd_object_write_unlock(const struct lu_env *env,
1380                                     struct dt_object *dt)
1381 {
1382         struct osd_object *obj = osd_dt_obj(dt);
1383         struct osd_thread_info *oti = osd_oti_get(env);
1384
1385         LINVRNT(osd_invariant(obj));
1386
1387         LASSERT(obj->oo_owner == env);
1388         LASSERT(oti->oti_w_locks > 0);
1389         oti->oti_w_locks--;
1390         obj->oo_owner = NULL;
1391         up_write(&obj->oo_sem);
1392 }
1393
1394 static int osd_object_write_locked(const struct lu_env *env,
1395                                    struct dt_object *dt)
1396 {
1397         struct osd_object *obj = osd_dt_obj(dt);
1398
1399         LINVRNT(osd_invariant(obj));
1400
1401         return obj->oo_owner == env;
1402 }
1403
1404 static int capa_is_sane(const struct lu_env *env,
1405                         struct osd_device *dev,
1406                         struct lustre_capa *capa,
1407                         struct lustre_capa_key *keys)
1408 {
1409         struct osd_thread_info *oti = osd_oti_get(env);
1410         struct lustre_capa *tcapa = &oti->oti_capa;
1411         struct obd_capa *oc;
1412         int i, rc = 0;
1413         ENTRY;
1414
1415         oc = capa_lookup(dev->od_capa_hash, capa, 0);
1416         if (oc) {
1417                 if (capa_is_expired(oc)) {
1418                         DEBUG_CAPA(D_ERROR, capa, "expired");
1419                         rc = -ESTALE;
1420                 }
1421                 capa_put(oc);
1422                 RETURN(rc);
1423         }
1424
1425         if (capa_is_expired_sec(capa)) {
1426                 DEBUG_CAPA(D_ERROR, capa, "expired");
1427                 RETURN(-ESTALE);
1428         }
1429
1430         spin_lock(&capa_lock);
1431         for (i = 0; i < 2; i++) {
1432                 if (keys[i].lk_keyid == capa->lc_keyid) {
1433                         oti->oti_capa_key = keys[i];
1434                         break;
1435                 }
1436         }
1437         spin_unlock(&capa_lock);
1438
1439         if (i == 2) {
1440                 DEBUG_CAPA(D_ERROR, capa, "no matched capa key");
1441                 RETURN(-ESTALE);
1442         }
1443
1444         rc = capa_hmac(tcapa->lc_hmac, capa, oti->oti_capa_key.lk_key);
1445         if (rc)
1446                 RETURN(rc);
1447
1448         if (memcmp(tcapa->lc_hmac, capa->lc_hmac, sizeof(capa->lc_hmac))) {
1449                 DEBUG_CAPA(D_ERROR, capa, "HMAC mismatch");
1450                 RETURN(-EACCES);
1451         }
1452
1453         oc = capa_add(dev->od_capa_hash, capa);
1454         capa_put(oc);
1455
1456         RETURN(0);
1457 }
1458
1459 int osd_object_auth(const struct lu_env *env, struct dt_object *dt,
1460                     struct lustre_capa *capa, __u64 opc)
1461 {
1462         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
1463         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
1464         struct lu_capainfo *lci;
1465         int rc;
1466
1467         if (!osd->od_fl_capa)
1468                 return 0;
1469
1470         if (capa == BYPASS_CAPA)
1471                 return 0;
1472
1473         lci = lu_capainfo_get(env);
1474         if (unlikely(lci == NULL))
1475                 return 0;
1476
1477         if (lci->lci_auth == LC_ID_NONE)
1478                 return 0;
1479
1480         if (capa == NULL) {
1481                 CERROR("%s: no capability provided for FID "DFID": rc = %d\n",
1482                        osd_name(osd), PFID(fid), -EACCES);
1483                 return -EACCES;
1484         }
1485
1486         if (!lu_fid_eq(fid, &capa->lc_fid)) {
1487                 DEBUG_CAPA(D_ERROR, capa, "fid "DFID" mismatch with",
1488                            PFID(fid));
1489                 return -EACCES;
1490         }
1491
1492         if (!capa_opc_supported(capa, opc)) {
1493                 DEBUG_CAPA(D_ERROR, capa, "opc "LPX64" not supported by", opc);
1494                 return -EACCES;
1495         }
1496
1497         rc = capa_is_sane(env, osd, capa, osd->od_capa_keys);
1498         if (rc != 0) {
1499                 DEBUG_CAPA(D_ERROR, capa, "insane: rc = %d", rc);
1500                 return -EACCES;
1501         }
1502
1503         return 0;
1504 }
1505
1506 static struct timespec *osd_inode_time(const struct lu_env *env,
1507                                        struct inode *inode, __u64 seconds)
1508 {
1509         struct osd_thread_info  *oti = osd_oti_get(env);
1510         struct timespec         *t   = &oti->oti_time;
1511
1512         t->tv_sec = seconds;
1513         t->tv_nsec = 0;
1514         *t = timespec_trunc(*t, inode->i_sb->s_time_gran);
1515         return t;
1516 }
1517
1518
1519 static void osd_inode_getattr(const struct lu_env *env,
1520                               struct inode *inode, struct lu_attr *attr)
1521 {
1522         attr->la_valid      |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
1523                                LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
1524                                LA_FLAGS | LA_NLINK | LA_RDEV | LA_BLKSIZE |
1525                                LA_TYPE;
1526
1527         attr->la_atime      = LTIME_S(inode->i_atime);
1528         attr->la_mtime      = LTIME_S(inode->i_mtime);
1529         attr->la_ctime      = LTIME_S(inode->i_ctime);
1530         attr->la_mode       = inode->i_mode;
1531         attr->la_size       = i_size_read(inode);
1532         attr->la_blocks     = inode->i_blocks;
1533         attr->la_uid        = inode->i_uid;
1534         attr->la_gid        = inode->i_gid;
1535         attr->la_flags      = LDISKFS_I(inode)->i_flags;
1536         attr->la_nlink      = inode->i_nlink;
1537         attr->la_rdev       = inode->i_rdev;
1538         attr->la_blksize    = 1 << inode->i_blkbits;
1539         attr->la_blkbits    = inode->i_blkbits;
1540 }
1541
1542 static int osd_attr_get(const struct lu_env *env,
1543                         struct dt_object *dt,
1544                         struct lu_attr *attr,
1545                         struct lustre_capa *capa)
1546 {
1547         struct osd_object *obj = osd_dt_obj(dt);
1548
1549         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
1550         LINVRNT(osd_invariant(obj));
1551
1552         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
1553                 return -EACCES;
1554
1555         spin_lock(&obj->oo_guard);
1556         osd_inode_getattr(env, obj->oo_inode, attr);
1557         spin_unlock(&obj->oo_guard);
1558         return 0;
1559 }
1560
1561 static int osd_declare_attr_set(const struct lu_env *env,
1562                                 struct dt_object *dt,
1563                                 const struct lu_attr *attr,
1564                                 struct thandle *handle)
1565 {
1566         struct osd_thandle     *oh;
1567         struct osd_object      *obj;
1568         struct osd_thread_info *info = osd_oti_get(env);
1569         struct lquota_id_info  *qi = &info->oti_qi;
1570         long long               bspace;
1571         int                     rc = 0;
1572         bool                    allocated;
1573         ENTRY;
1574
1575         LASSERT(dt != NULL);
1576         LASSERT(handle != NULL);
1577
1578         obj = osd_dt_obj(dt);
1579         LASSERT(osd_invariant(obj));
1580
1581         oh = container_of0(handle, struct osd_thandle, ot_super);
1582         LASSERT(oh->ot_handle == NULL);
1583
1584         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
1585                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
1586
1587         if (attr == NULL || obj->oo_inode == NULL)
1588                 RETURN(rc);
1589
1590         bspace   = obj->oo_inode->i_blocks;
1591         bspace <<= obj->oo_inode->i_sb->s_blocksize_bits;
1592         bspace   = toqb(bspace);
1593
1594         /* Changing ownership is always preformed by super user, it should not
1595          * fail with EDQUOT.
1596          *
1597          * We still need to call the osd_declare_qid() to calculate the journal
1598          * credits for updating quota accounting files and to trigger quota
1599          * space adjustment once the operation is completed.*/
1600         if ((attr->la_valid & LA_UID) != 0 &&
1601              attr->la_uid != obj->oo_inode->i_uid) {
1602                 qi->lqi_type = USRQUOTA;
1603
1604                 /* inode accounting */
1605                 qi->lqi_is_blk = false;
1606
1607                 /* one more inode for the new owner ... */
1608                 qi->lqi_id.qid_uid = attr->la_uid;
1609                 qi->lqi_space      = 1;
1610                 allocated = (attr->la_uid == 0) ? true : false;
1611                 rc = osd_declare_qid(env, oh, qi, allocated, NULL);
1612                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1613                         rc = 0;
1614                 if (rc)
1615                         RETURN(rc);
1616
1617                 /* and one less inode for the current uid */
1618                 qi->lqi_id.qid_uid = obj->oo_inode->i_uid;
1619                 qi->lqi_space      = -1;
1620                 rc = osd_declare_qid(env, oh, qi, true, NULL);
1621                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1622                         rc = 0;
1623                 if (rc)
1624                         RETURN(rc);
1625
1626                 /* block accounting */
1627                 qi->lqi_is_blk = true;
1628
1629                 /* more blocks for the new owner ... */
1630                 qi->lqi_id.qid_uid = attr->la_uid;
1631                 qi->lqi_space      = bspace;
1632                 allocated = (attr->la_uid == 0) ? true : false;
1633                 rc = osd_declare_qid(env, oh, qi, allocated, NULL);
1634                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1635                         rc = 0;
1636                 if (rc)
1637                         RETURN(rc);
1638
1639                 /* and finally less blocks for the current owner */
1640                 qi->lqi_id.qid_uid = obj->oo_inode->i_uid;
1641                 qi->lqi_space      = -bspace;
1642                 rc = osd_declare_qid(env, oh, qi, true, NULL);
1643                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1644                         rc = 0;
1645                 if (rc)
1646                         RETURN(rc);
1647         }
1648
1649         if (attr->la_valid & LA_GID &&
1650             attr->la_gid != obj->oo_inode->i_gid) {
1651                 qi->lqi_type = GRPQUOTA;
1652
1653                 /* inode accounting */
1654                 qi->lqi_is_blk = false;
1655
1656                 /* one more inode for the new group owner ... */
1657                 qi->lqi_id.qid_gid = attr->la_gid;
1658                 qi->lqi_space      = 1;
1659                 allocated = (attr->la_gid == 0) ? true : false;
1660                 rc = osd_declare_qid(env, oh, qi, allocated, NULL);
1661                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1662                         rc = 0;
1663                 if (rc)
1664                         RETURN(rc);
1665
1666                 /* and one less inode for the current gid */
1667                 qi->lqi_id.qid_gid = obj->oo_inode->i_gid;
1668                 qi->lqi_space      = -1;
1669                 rc = osd_declare_qid(env, oh, qi, true, NULL);
1670                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1671                         rc = 0;
1672                 if (rc)
1673                         RETURN(rc);
1674
1675                 /* block accounting */
1676                 qi->lqi_is_blk = true;
1677
1678                 /* more blocks for the new owner ... */
1679                 qi->lqi_id.qid_gid = attr->la_gid;
1680                 qi->lqi_space      = bspace;
1681                 allocated = (attr->la_gid == 0) ? true : false;
1682                 rc = osd_declare_qid(env, oh, qi, allocated, NULL);
1683                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1684                         rc = 0;
1685                 if (rc)
1686                         RETURN(rc);
1687
1688                 /* and finally less blocks for the current owner */
1689                 qi->lqi_id.qid_gid = obj->oo_inode->i_gid;
1690                 qi->lqi_space      = -bspace;
1691                 rc = osd_declare_qid(env, oh, qi, true, NULL);
1692                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1693                         rc = 0;
1694                 if (rc)
1695                         RETURN(rc);
1696         }
1697
1698         RETURN(rc);
1699 }
1700
1701 static int osd_inode_setattr(const struct lu_env *env,
1702                              struct inode *inode, const struct lu_attr *attr)
1703 {
1704         __u64 bits;
1705
1706         bits = attr->la_valid;
1707
1708         if (bits & LA_ATIME)
1709                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
1710         if (bits & LA_CTIME)
1711                 inode->i_ctime  = *osd_inode_time(env, inode, attr->la_ctime);
1712         if (bits & LA_MTIME)
1713                 inode->i_mtime  = *osd_inode_time(env, inode, attr->la_mtime);
1714         if (bits & LA_SIZE) {
1715                 LDISKFS_I(inode)->i_disksize = attr->la_size;
1716                 i_size_write(inode, attr->la_size);
1717         }
1718
1719 #if 0
1720         /* OSD should not change "i_blocks" which is used by quota.
1721          * "i_blocks" should be changed by ldiskfs only. */
1722         if (bits & LA_BLOCKS)
1723                 inode->i_blocks = attr->la_blocks;
1724 #endif
1725         if (bits & LA_MODE)
1726                 inode->i_mode   = (inode->i_mode & S_IFMT) |
1727                         (attr->la_mode & ~S_IFMT);
1728         if (bits & LA_UID)
1729                 inode->i_uid    = attr->la_uid;
1730         if (bits & LA_GID)
1731                 inode->i_gid    = attr->la_gid;
1732         if (bits & LA_NLINK)
1733                 set_nlink(inode, attr->la_nlink);
1734         if (bits & LA_RDEV)
1735                 inode->i_rdev   = attr->la_rdev;
1736
1737         if (bits & LA_FLAGS) {
1738                 /* always keep S_NOCMTIME */
1739                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
1740                                  S_NOCMTIME;
1741         }
1742         return 0;
1743 }
1744
1745 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr)
1746 {
1747         if ((attr->la_valid & LA_UID && attr->la_uid != inode->i_uid) ||
1748             (attr->la_valid & LA_GID && attr->la_gid != inode->i_gid)) {
1749                 struct iattr    iattr;
1750                 int             rc;
1751
1752                 iattr.ia_valid = 0;
1753                 if (attr->la_valid & LA_UID)
1754                         iattr.ia_valid |= ATTR_UID;
1755                 if (attr->la_valid & LA_GID)
1756                         iattr.ia_valid |= ATTR_GID;
1757                 iattr.ia_uid = attr->la_uid;
1758                 iattr.ia_gid = attr->la_gid;
1759
1760                 rc = ll_vfs_dq_transfer(inode, &iattr);
1761                 if (rc) {
1762                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
1763                                "enforcement enabled on the ldiskfs filesystem?",
1764                                inode->i_sb->s_id, rc);
1765                         return rc;
1766                 }
1767         }
1768         return 0;
1769 }
1770
1771 static int osd_attr_set(const struct lu_env *env,
1772                         struct dt_object *dt,
1773                         const struct lu_attr *attr,
1774                         struct thandle *handle,
1775                         struct lustre_capa *capa)
1776 {
1777         struct osd_object *obj = osd_dt_obj(dt);
1778         struct inode      *inode;
1779         int rc;
1780
1781         LASSERT(handle != NULL);
1782         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
1783         LASSERT(osd_invariant(obj));
1784
1785         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
1786                 return -EACCES;
1787
1788         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
1789
1790         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING)) {
1791                 struct osd_thread_info  *oti  = osd_oti_get(env);
1792                 const struct lu_fid     *fid0 = lu_object_fid(&dt->do_lu);
1793                 struct lu_fid           *fid1 = &oti->oti_fid;
1794                 struct osd_inode_id     *id   = &oti->oti_id;
1795                 struct iam_path_descr   *ipd;
1796                 struct iam_container    *bag;
1797                 struct osd_thandle      *oh;
1798                 int                      rc;
1799
1800                 fid_cpu_to_be(fid1, fid0);
1801                 memset(id, 1, sizeof(*id));
1802                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
1803                                   fid0)->oi_dir.od_container;
1804                 ipd = osd_idx_ipd_get(env, bag);
1805                 if (unlikely(ipd == NULL))
1806                         RETURN(-ENOMEM);
1807
1808                 oh = container_of0(handle, struct osd_thandle, ot_super);
1809                 rc = iam_update(oh->ot_handle, bag, (const struct iam_key *)fid1,
1810                                 (const struct iam_rec *)id, ipd);
1811                 osd_ipd_put(env, bag, ipd);
1812                 return(rc > 0 ? 0 : rc);
1813         }
1814
1815         inode = obj->oo_inode;
1816         ll_vfs_dq_init(inode);
1817
1818         rc = osd_quota_transfer(inode, attr);
1819         if (rc)
1820                 return rc;
1821
1822         spin_lock(&obj->oo_guard);
1823         rc = osd_inode_setattr(env, inode, attr);
1824         spin_unlock(&obj->oo_guard);
1825
1826         if (!rc)
1827                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1828         return rc;
1829 }
1830
1831 struct dentry *osd_child_dentry_get(const struct lu_env *env,
1832                                     struct osd_object *obj,
1833                                     const char *name, const int namelen)
1834 {
1835         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
1836 }
1837
1838 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
1839                       umode_t mode, struct dt_allocation_hint *hint,
1840                       struct thandle *th)
1841 {
1842         int result;
1843         struct osd_device  *osd = osd_obj2dev(obj);
1844         struct osd_thandle *oth;
1845         struct dt_object   *parent = NULL;
1846         struct inode       *inode;
1847
1848         LINVRNT(osd_invariant(obj));
1849         LASSERT(obj->oo_inode == NULL);
1850         LASSERT(obj->oo_hl_head == NULL);
1851
1852         if (S_ISDIR(mode) && ldiskfs_pdo) {
1853                 obj->oo_hl_head =ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
1854                 if (obj->oo_hl_head == NULL)
1855                         return -ENOMEM;
1856         }
1857
1858         oth = container_of(th, struct osd_thandle, ot_super);
1859         LASSERT(oth->ot_handle->h_transaction != NULL);
1860
1861         if (hint && hint->dah_parent)
1862                 parent = hint->dah_parent;
1863
1864         inode = ldiskfs_create_inode(oth->ot_handle,
1865                                      parent ? osd_dt_obj(parent)->oo_inode :
1866                                               osd_sb(osd)->s_root->d_inode,
1867                                      mode);
1868         if (!IS_ERR(inode)) {
1869                 /* Do not update file c/mtime in ldiskfs.
1870                  * NB: don't need any lock because no contention at this
1871                  * early stage */
1872                 inode->i_flags |= S_NOCMTIME;
1873
1874                 /* For new created object, it must be consistent,
1875                  * and it is unnecessary to scrub against it. */
1876                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
1877                 obj->oo_inode = inode;
1878                 result = 0;
1879         } else {
1880                 if (obj->oo_hl_head != NULL) {
1881                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
1882                         obj->oo_hl_head = NULL;
1883                 }
1884                 result = PTR_ERR(inode);
1885         }
1886         LINVRNT(osd_invariant(obj));
1887         return result;
1888 }
1889
1890 enum {
1891         OSD_NAME_LEN = 255
1892 };
1893
1894 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
1895                      struct lu_attr *attr,
1896                      struct dt_allocation_hint *hint,
1897                      struct dt_object_format *dof,
1898                      struct thandle *th)
1899 {
1900         int result;
1901         struct osd_thandle *oth;
1902         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX));
1903
1904         LASSERT(S_ISDIR(attr->la_mode));
1905
1906         oth = container_of(th, struct osd_thandle, ot_super);
1907         LASSERT(oth->ot_handle->h_transaction != NULL);
1908         result = osd_mkfile(info, obj, mode, hint, th);
1909
1910         return result;
1911 }
1912
1913 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
1914                         struct lu_attr *attr,
1915                         struct dt_allocation_hint *hint,
1916                         struct dt_object_format *dof,
1917                         struct thandle *th)
1918 {
1919         int result;
1920         struct osd_thandle *oth;
1921         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
1922
1923         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
1924
1925         LASSERT(S_ISREG(attr->la_mode));
1926
1927         oth = container_of(th, struct osd_thandle, ot_super);
1928         LASSERT(oth->ot_handle->h_transaction != NULL);
1929
1930         result = osd_mkfile(info, obj, mode, hint, th);
1931         if (result == 0) {
1932                 LASSERT(obj->oo_inode != NULL);
1933                 if (feat->dif_flags & DT_IND_VARKEY)
1934                         result = iam_lvar_create(obj->oo_inode,
1935                                                  feat->dif_keysize_max,
1936                                                  feat->dif_ptrsize,
1937                                                  feat->dif_recsize_max,
1938                                                  oth->ot_handle);
1939                 else
1940                         result = iam_lfix_create(obj->oo_inode,
1941                                                  feat->dif_keysize_max,
1942                                                  feat->dif_ptrsize,
1943                                                  feat->dif_recsize_max,
1944                                                  oth->ot_handle);
1945
1946         }
1947         return result;
1948 }
1949
1950 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
1951                      struct lu_attr *attr,
1952                      struct dt_allocation_hint *hint,
1953                      struct dt_object_format *dof,
1954                      struct thandle *th)
1955 {
1956         LASSERT(S_ISREG(attr->la_mode));
1957         return osd_mkfile(info, obj, (attr->la_mode &
1958                                (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
1959 }
1960
1961 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
1962                      struct lu_attr *attr,
1963                      struct dt_allocation_hint *hint,
1964                      struct dt_object_format *dof,
1965                      struct thandle *th)
1966 {
1967         LASSERT(S_ISLNK(attr->la_mode));
1968         return osd_mkfile(info, obj, (attr->la_mode &
1969                               (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
1970 }
1971
1972 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
1973                      struct lu_attr *attr,
1974                      struct dt_allocation_hint *hint,
1975                      struct dt_object_format *dof,
1976                      struct thandle *th)
1977 {
1978         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
1979         int result;
1980
1981         LINVRNT(osd_invariant(obj));
1982         LASSERT(obj->oo_inode == NULL);
1983         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
1984                 S_ISFIFO(mode) || S_ISSOCK(mode));
1985
1986         result = osd_mkfile(info, obj, mode, hint, th);
1987         if (result == 0) {
1988                 LASSERT(obj->oo_inode != NULL);
1989                 /*
1990                  * This inode should be marked dirty for i_rdev.  Currently
1991                  * that is done in the osd_attr_init().
1992                  */
1993                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
1994                                    attr->la_rdev);
1995         }
1996         LINVRNT(osd_invariant(obj));
1997         return result;
1998 }
1999
2000 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
2001                               struct lu_attr *,
2002                               struct dt_allocation_hint *hint,
2003                               struct dt_object_format *dof,
2004                               struct thandle *);
2005
2006 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
2007 {
2008         osd_obj_type_f result;
2009
2010         switch (type) {
2011         case DFT_DIR:
2012                 result = osd_mkdir;
2013                 break;
2014         case DFT_REGULAR:
2015                 result = osd_mkreg;
2016                 break;
2017         case DFT_SYM:
2018                 result = osd_mksym;
2019                 break;
2020         case DFT_NODE:
2021                 result = osd_mknod;
2022                 break;
2023         case DFT_INDEX:
2024                 result = osd_mk_index;
2025                 break;
2026
2027         default:
2028                 LBUG();
2029                 break;
2030         }
2031         return result;
2032 }
2033
2034
2035 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
2036                         struct dt_object *parent, struct dt_object *child,
2037                         umode_t child_mode)
2038 {
2039         LASSERT(ah);
2040
2041         memset(ah, 0, sizeof(*ah));
2042         ah->dah_parent = parent;
2043         ah->dah_mode = child_mode;
2044 }
2045
2046 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
2047                           struct lu_attr *attr, struct dt_object_format *dof)
2048 {
2049         struct inode   *inode = obj->oo_inode;
2050         __u64           valid = attr->la_valid;
2051         int             result;
2052
2053         attr->la_valid &= ~(LA_TYPE | LA_MODE);
2054
2055         if (dof->dof_type != DFT_NODE)
2056                 attr->la_valid &= ~LA_RDEV;
2057         if ((valid & LA_ATIME) && (attr->la_atime == LTIME_S(inode->i_atime)))
2058                 attr->la_valid &= ~LA_ATIME;
2059         if ((valid & LA_CTIME) && (attr->la_ctime == LTIME_S(inode->i_ctime)))
2060                 attr->la_valid &= ~LA_CTIME;
2061         if ((valid & LA_MTIME) && (attr->la_mtime == LTIME_S(inode->i_mtime)))
2062                 attr->la_valid &= ~LA_MTIME;
2063
2064         result = osd_quota_transfer(inode, attr);
2065         if (result)
2066                 return;
2067
2068         if (attr->la_valid != 0) {
2069                 result = osd_inode_setattr(info->oti_env, inode, attr);
2070                 /*
2071                  * The osd_inode_setattr() should always succeed here.  The
2072                  * only error that could be returned is EDQUOT when we are
2073                  * trying to change the UID or GID of the inode. However, this
2074                  * should not happen since quota enforcement is no longer
2075                  * enabled on ldiskfs (lquota takes care of it).
2076                  */
2077                 LASSERTF(result == 0, "%d", result);
2078                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2079         }
2080
2081         attr->la_valid = valid;
2082 }
2083
2084 /**
2085  * Helper function for osd_object_create()
2086  *
2087  * \retval 0, on success
2088  */
2089 static int __osd_object_create(struct osd_thread_info *info,
2090                                struct osd_object *obj, struct lu_attr *attr,
2091                                struct dt_allocation_hint *hint,
2092                                struct dt_object_format *dof,
2093                                struct thandle *th)
2094 {
2095         int     result;
2096         __u32   umask;
2097
2098         /* we drop umask so that permissions we pass are not affected */
2099         umask = current->fs->umask;
2100         current->fs->umask = 0;
2101
2102         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
2103                                                   th);
2104         if (result == 0) {
2105                 osd_attr_init(info, obj, attr, dof);
2106                 osd_object_init0(obj);
2107                 /* bz 24037 */
2108                 if (obj->oo_inode && (obj->oo_inode->i_state & I_NEW))
2109                         unlock_new_inode(obj->oo_inode);
2110         }
2111
2112         /* restore previous umask value */
2113         current->fs->umask = umask;
2114
2115         return result;
2116 }
2117
2118 /**
2119  * Helper function for osd_object_create()
2120  *
2121  * \retval 0, on success
2122  */
2123 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
2124                            const struct lu_fid *fid, struct thandle *th)
2125 {
2126         struct osd_thread_info *info = osd_oti_get(env);
2127         struct osd_inode_id    *id   = &info->oti_id;
2128         struct osd_device      *osd  = osd_obj2dev(obj);
2129
2130         LASSERT(obj->oo_inode != NULL);
2131
2132         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
2133         return osd_oi_insert(info, osd, fid, id, th, OI_CHECK_FLD);
2134 }
2135
2136 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
2137                    obd_seq seq, struct lu_seq_range *range)
2138 {
2139         struct seq_server_site  *ss = osd_seq_site(osd);
2140         int                     rc;
2141
2142         if (fid_seq_is_idif(seq)) {
2143                 fld_range_set_ost(range);
2144                 range->lsr_index = idif_ost_idx(seq);
2145                 return 0;
2146         }
2147
2148         if (!fid_seq_in_fldb(seq)) {
2149                 fld_range_set_mdt(range);
2150                 if (ss != NULL)
2151                         /* FIXME: If ss is NULL, it suppose not get lsr_index
2152                          * at all */
2153                         range->lsr_index = ss->ss_node_id;
2154                 return 0;
2155         }
2156
2157         LASSERT(ss != NULL);
2158         fld_range_set_any(range);
2159         rc = fld_server_lookup(env, ss->ss_server_fld, seq, range);
2160         if (rc != 0) {
2161                 CERROR("%s: cannot find FLD range for "LPX64": rc = %d\n",
2162                        osd_name(osd), seq, rc);
2163         }
2164         return rc;
2165 }
2166
2167 /*
2168  * Concurrency: no external locking is necessary.
2169  */
2170 static int osd_declare_object_create(const struct lu_env *env,
2171                                      struct dt_object *dt,
2172                                      struct lu_attr *attr,
2173                                      struct dt_allocation_hint *hint,
2174                                      struct dt_object_format *dof,
2175                                      struct thandle *handle)
2176 {
2177         struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
2178         struct osd_thandle      *oh;
2179         int                      rc;
2180         ENTRY;
2181
2182         LASSERT(handle != NULL);
2183
2184         oh = container_of0(handle, struct osd_thandle, ot_super);
2185         LASSERT(oh->ot_handle == NULL);
2186
2187         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
2188                              osd_dto_credits_noquota[DTO_OBJECT_CREATE]);
2189         if (!fid_is_on_ost(osd_oti_get(env), osd_dt_dev(handle->th_dev),
2190                            lu_object_fid(&dt->do_lu), OI_CHECK_FLD))
2191                 /* Reuse idle OI block may cause additional one OI block
2192                  * to be changed. */
2193                 osd_trans_declare_op(env, oh, OSD_OT_INSERT,
2194                                 osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
2195
2196         /* If this is directory, then we expect . and .. to be inserted as
2197          * well. The one directory block always needs to be created for the
2198          * directory, so we could use DTO_WRITE_BASE here (GDT, block bitmap,
2199          * block), there is no danger of needing a tree for the first block.
2200          */
2201         if (attr && S_ISDIR(attr->la_mode)) {
2202                 osd_trans_declare_op(env, oh, OSD_OT_INSERT,
2203                                      osd_dto_credits_noquota[DTO_WRITE_BASE]);
2204                 osd_trans_declare_op(env, oh, OSD_OT_INSERT, 0);
2205         }
2206
2207         if (!attr)
2208                 RETURN(0);
2209
2210         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid, 1, oh,
2211                                    false, false, NULL, false);
2212         if (rc != 0)
2213                 RETURN(rc);
2214
2215         /* It does fld look up inside declare, and the result will be
2216          * added to fld cache, so the following fld lookup inside insert
2217          * does not need send RPC anymore, so avoid send rpc with holding
2218          * transaction */
2219         if (fid_is_norm(lu_object_fid(&dt->do_lu)) &&
2220                 !fid_is_last_id(lu_object_fid(&dt->do_lu)))
2221                 osd_fld_lookup(env, osd_dt_dev(handle->th_dev),
2222                                fid_seq(lu_object_fid(&dt->do_lu)), range);
2223
2224
2225         RETURN(rc);
2226 }
2227
2228 static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
2229                              struct lu_attr *attr,
2230                              struct dt_allocation_hint *hint,
2231                              struct dt_object_format *dof,
2232                              struct thandle *th)
2233 {
2234         const struct lu_fid    *fid    = lu_object_fid(&dt->do_lu);
2235         struct osd_object      *obj    = osd_dt_obj(dt);
2236         struct osd_thread_info *info   = osd_oti_get(env);
2237         int result;
2238
2239         ENTRY;
2240
2241         LINVRNT(osd_invariant(obj));
2242         LASSERT(!dt_object_exists(dt) && !dt_object_remote(dt));
2243         LASSERT(osd_write_locked(env, obj));
2244         LASSERT(th != NULL);
2245
2246         if (unlikely(fid_is_acct(fid)))
2247                 /* Quota files can't be created from the kernel any more,
2248                  * 'tune2fs -O quota' will take care of creating them */
2249                 RETURN(-EPERM);
2250
2251         osd_trans_exec_op(env, th, OSD_OT_CREATE);
2252         osd_trans_declare_rb(env, th, OSD_OT_REF_ADD);
2253
2254         result = __osd_object_create(info, obj, attr, hint, dof, th);
2255         if (result == 0)
2256                 result = __osd_oi_insert(env, obj, fid, th);
2257
2258         LASSERT(ergo(result == 0,
2259                      dt_object_exists(dt) && !dt_object_remote(dt)));
2260
2261         LASSERT(osd_invariant(obj));
2262         RETURN(result);
2263 }
2264
2265 /**
2266  * Called to destroy on-disk representation of the object
2267  *
2268  * Concurrency: must be locked
2269  */
2270 static int osd_declare_object_destroy(const struct lu_env *env,
2271                                       struct dt_object *dt,
2272                                       struct thandle *th)
2273 {
2274         struct osd_object  *obj = osd_dt_obj(dt);
2275         struct inode       *inode = obj->oo_inode;
2276         struct osd_thandle *oh;
2277         int                 rc;
2278         ENTRY;
2279
2280         oh = container_of0(th, struct osd_thandle, ot_super);
2281         LASSERT(oh->ot_handle == NULL);
2282         LASSERT(inode);
2283
2284         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
2285                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
2286         /* Recycle idle OI leaf may cause additional three OI blocks
2287          * to be changed. */
2288         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
2289                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
2290         /* one less inode */
2291         rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, -1, oh,
2292                                    false, true, NULL, false);
2293         if (rc)
2294                 RETURN(rc);
2295         /* data to be truncated */
2296         rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, 0, oh,
2297                                    true, true, NULL, false);
2298         RETURN(rc);
2299 }
2300
2301 static int osd_object_destroy(const struct lu_env *env,
2302                               struct dt_object *dt,
2303                               struct thandle *th)
2304 {
2305         const struct lu_fid    *fid = lu_object_fid(&dt->do_lu);
2306         struct osd_object      *obj = osd_dt_obj(dt);
2307         struct inode           *inode = obj->oo_inode;
2308         struct osd_device      *osd = osd_obj2dev(obj);
2309         struct osd_thandle     *oh;
2310         int                     result;
2311         ENTRY;
2312
2313         oh = container_of0(th, struct osd_thandle, ot_super);
2314         LASSERT(oh->ot_handle);
2315         LASSERT(inode);
2316         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
2317
2318         if (unlikely(fid_is_acct(fid)))
2319                 RETURN(-EPERM);
2320
2321         if (S_ISDIR(inode->i_mode)) {
2322                 LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1);
2323                 /* it will check/delete the inode from remote parent,
2324                  * how to optimize it? unlink performance impaction XXX */
2325                 result = osd_delete_from_remote_parent(env, osd, obj, oh);
2326                 if (result != 0 && result != -ENOENT) {
2327                         CERROR("%s: delete inode "DFID": rc = %d\n",
2328                                osd_name(osd), PFID(fid), result);
2329                 }
2330                 spin_lock(&obj->oo_guard);
2331                 clear_nlink(inode);
2332                 spin_unlock(&obj->oo_guard);
2333                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2334         }
2335
2336         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
2337
2338         result = osd_oi_delete(osd_oti_get(env), osd, fid, th, OI_CHECK_FLD);
2339
2340         /* XXX: add to ext3 orphan list */
2341         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
2342
2343         /* not needed in the cache anymore */
2344         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
2345
2346         RETURN(0);
2347 }
2348
2349 /**
2350  * Put the fid into lustre_mdt_attrs, and then place the structure
2351  * inode's ea. This fid should not be altered during the life time
2352  * of the inode.
2353  *
2354  * \retval +ve, on success
2355  * \retval -ve, on error
2356  *
2357  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
2358  */
2359 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
2360                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
2361 {
2362         struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
2363         int                      rc;
2364         ENTRY;
2365
2366         if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
2367                 RETURN(0);
2368
2369         lustre_lma_init(lma, fid, compat, incompat);
2370         lustre_lma_swab(lma);
2371
2372         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma, sizeof(*lma),
2373                              XATTR_CREATE);
2374         /* LMA may already exist, but we need to check that all the
2375          * desired compat/incompat flags have been added. */
2376         if (unlikely(rc == -EEXIST)) {
2377                 if (compat == 0 && incompat == 0)
2378                         RETURN(0);
2379
2380                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
2381                                      XATTR_NAME_LMA, info->oti_mdt_attrs_old,
2382                                      LMA_OLD_SIZE);
2383                 if (rc <= 0)
2384                         RETURN(-EINVAL);
2385
2386                 lustre_lma_swab(lma);
2387                 if (!(~lma->lma_compat & compat) &&
2388                     !(~lma->lma_incompat & incompat))
2389                         RETURN(0);
2390
2391                 lma->lma_compat |= compat;
2392                 lma->lma_incompat |= incompat;
2393                 lustre_lma_swab(lma);
2394                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
2395                                      sizeof(*lma), XATTR_REPLACE);
2396         }
2397
2398         RETURN(rc);
2399 }
2400
2401 /**
2402  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
2403  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
2404  * To have compatilibility with 1.8 ldiskfs driver we need to have
2405  * magic number at start of fid data.
2406  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
2407  * its inmemory API.
2408  */
2409 void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
2410                                   const struct dt_rec *fid)
2411 {
2412         if (!fid_is_namespace_visible((const struct lu_fid *)fid) ||
2413             OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
2414                 param->edp_magic = 0;
2415                 return;
2416         }
2417
2418         param->edp_magic = LDISKFS_LUFID_MAGIC;
2419         param->edp_len =  sizeof(struct lu_fid) + 1;
2420         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
2421 }
2422
2423 /**
2424  * Try to read the fid from inode ea into dt_rec.
2425  *
2426  * \param fid object fid.
2427  *
2428  * \retval 0 on success
2429  */
2430 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
2431                           __u32 ino, struct lu_fid *fid,
2432                           struct osd_inode_id *id)
2433 {
2434         struct osd_thread_info *info  = osd_oti_get(env);
2435         struct inode           *inode;
2436         ENTRY;
2437
2438         osd_id_gen(id, ino, OSD_OII_NOGEN);
2439         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
2440         if (IS_ERR(inode))
2441                 RETURN(PTR_ERR(inode));
2442
2443         iput(inode);
2444         RETURN(0);
2445 }
2446
2447 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
2448                                         struct inode *dir,
2449                                         struct inode  *parent_dir,
2450                                         const struct dt_rec *dot_fid,
2451                                         const struct dt_rec *dot_dot_fid,
2452                                         struct osd_thandle *oth)
2453 {
2454         struct ldiskfs_dentry_param *dot_ldp;
2455         struct ldiskfs_dentry_param *dot_dot_ldp;
2456
2457         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
2458         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
2459
2460         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
2461         dot_ldp->edp_magic = 0;
2462         return ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
2463                                         dir, dot_ldp, dot_dot_ldp);
2464 }
2465
2466 /**
2467  * Create an local agent inode for remote entry
2468  */
2469 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
2470                                                   struct osd_device *osd,
2471                                                   struct osd_object *pobj,
2472                                                   const struct lu_fid *fid,
2473                                                   struct thandle *th)
2474 {
2475         struct osd_thread_info  *info = osd_oti_get(env);
2476         struct inode            *local;
2477         struct osd_thandle      *oh;
2478         int                     rc;
2479         ENTRY;
2480
2481         LASSERT(th);
2482         oh = container_of(th, struct osd_thandle, ot_super);
2483         LASSERT(oh->ot_handle->h_transaction != NULL);
2484
2485         /* FIXME: Insert index api needs to know the mode of
2486          * the remote object. Just use S_IFDIR for now */
2487         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode, S_IFDIR);
2488         if (IS_ERR(local)) {
2489                 CERROR("%s: create local error %d\n", osd_name(osd),
2490                        (int)PTR_ERR(local));
2491                 RETURN(local);
2492         }
2493
2494         /* Set special LMA flag for local agent inode */
2495         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
2496         if (rc != 0) {
2497                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
2498                        osd_name(osd), PFID(fid), rc);
2499                 RETURN(ERR_PTR(rc));
2500         }
2501
2502         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
2503                 (const struct dt_rec *)lu_object_fid(&pobj->oo_dt.do_lu),
2504                 (const struct dt_rec *)fid, oh);
2505         if (rc != 0) {
2506                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
2507                         osd_name(osd), PFID(fid), rc);
2508                 RETURN(ERR_PTR(rc));
2509         }
2510
2511         RETURN(local);
2512 }
2513
2514 /**
2515  * Delete local agent inode for remote entry
2516  */
2517 static int osd_delete_local_agent_inode(const struct lu_env *env,
2518                                         struct osd_device *osd,
2519                                         const struct lu_fid *fid,
2520                                         __u32 ino, struct osd_thandle *oh)
2521 {
2522         struct osd_thread_info  *oti = osd_oti_get(env);
2523         struct osd_inode_id     *id = &oti->oti_id;
2524         struct inode            *inode;
2525         ENTRY;
2526
2527         id->oii_ino = le32_to_cpu(ino);
2528         id->oii_gen = OSD_OII_NOGEN;
2529         inode = osd_iget(oti, osd, id);
2530         if (IS_ERR(inode)) {
2531                 CERROR("%s: iget error "DFID" id %u:%u\n", osd_name(osd),
2532                        PFID(fid), id->oii_ino, id->oii_gen);
2533                 RETURN(PTR_ERR(inode));
2534         }
2535
2536         clear_nlink(inode);
2537         mark_inode_dirty(inode);
2538         CDEBUG(D_INODE, "%s: delete remote inode "DFID" %lu\n",
2539                 osd_name(osd), PFID(fid), inode->i_ino);
2540         iput(inode);
2541         RETURN(0);
2542 }
2543
2544 /**
2545  * OSD layer object create function for interoperability mode (b11826).
2546  * This is mostly similar to osd_object_create(). Only difference being, fid is
2547  * inserted into inode ea here.
2548  *
2549  * \retval   0, on success
2550  * \retval -ve, on error
2551  */
2552 static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
2553                                 struct lu_attr *attr,
2554                                 struct dt_allocation_hint *hint,
2555                                 struct dt_object_format *dof,
2556                                 struct thandle *th)
2557 {
2558         const struct lu_fid    *fid    = lu_object_fid(&dt->do_lu);
2559         struct osd_object      *obj    = osd_dt_obj(dt);
2560         struct osd_thread_info *info   = osd_oti_get(env);
2561         int                     result;
2562
2563         ENTRY;
2564
2565         LASSERT(osd_invariant(obj));
2566         LASSERT(!dt_object_exists(dt) && !dt_object_remote(dt));
2567         LASSERT(osd_write_locked(env, obj));
2568         LASSERT(th != NULL);
2569
2570         if (unlikely(fid_is_acct(fid)))
2571                 /* Quota files can't be created from the kernel any more,
2572                  * 'tune2fs -O quota' will take care of creating them */
2573                 RETURN(-EPERM);
2574
2575         osd_trans_exec_op(env, th, OSD_OT_CREATE);
2576         osd_trans_declare_rb(env, th, OSD_OT_REF_ADD);
2577
2578         result = __osd_object_create(info, obj, attr, hint, dof, th);
2579         if (result == 0)
2580                 result = osd_ea_fid_set(info, obj->oo_inode, fid,
2581                                 fid_is_on_ost(info, osd_obj2dev(obj),
2582                                               fid, OI_CHECK_FLD) ?
2583                                 LMAC_FID_ON_OST : 0, 0);
2584
2585         if (result == 0)
2586                 result = __osd_oi_insert(env, obj, fid, th);
2587
2588         LASSERT(ergo(result == 0,
2589                      dt_object_exists(dt) && !dt_object_remote(dt)));
2590         LINVRNT(osd_invariant(obj));
2591         RETURN(result);
2592 }
2593
2594 static int osd_declare_object_ref_add(const struct lu_env *env,
2595                                       struct dt_object *dt,
2596                                       struct thandle *handle)
2597 {
2598         struct osd_thandle       *oh;
2599
2600         /* it's possible that object doesn't exist yet */
2601         LASSERT(handle != NULL);
2602
2603         oh = container_of0(handle, struct osd_thandle, ot_super);
2604         LASSERT(oh->ot_handle == NULL);
2605
2606         osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
2607                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2608
2609         return 0;
2610 }
2611
2612 /*
2613  * Concurrency: @dt is write locked.
2614  */
2615 static int osd_object_ref_add(const struct lu_env *env,
2616                               struct dt_object *dt, struct thandle *th)
2617 {
2618         struct osd_object *obj = osd_dt_obj(dt);
2619         struct inode      *inode = obj->oo_inode;
2620         bool               need_dirty = false;
2621         int                rc = 0;
2622
2623         LINVRNT(osd_invariant(obj));
2624         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2625         LASSERT(osd_write_locked(env, obj));
2626         LASSERT(th != NULL);
2627
2628         osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
2629
2630         /* This based on ldiskfs_inc_count(), which is not exported.
2631          *
2632          * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
2633          * (65000) subdirectories by storing "1" in i_nlink if the link count
2634          * would otherwise overflow. Directory tranversal tools understand
2635          * that (st_nlink == 1) indicates that the filesystem dose not track
2636          * hard links count on the directory, and will not abort subdirectory
2637          * scanning early once (st_nlink - 2) subdirs have been found.
2638          *
2639          * This also has to properly handle the case of inodes with nlink == 0
2640          * in case they are being linked into the PENDING directory
2641          */
2642         spin_lock(&obj->oo_guard);
2643         if (unlikely(!S_ISDIR(inode->i_mode) &&
2644                      inode->i_nlink >= LDISKFS_LINK_MAX)) {
2645                 /* MDD should have checked this, but good to be safe */
2646                 rc = -EMLINK;
2647         } else if (unlikely(inode->i_nlink == 0 ||
2648                             (S_ISDIR(inode->i_mode) &&
2649                              inode->i_nlink >= LDISKFS_LINK_MAX))) {
2650                 /* inc_nlink from 0 may cause WARN_ON */
2651                 set_nlink(inode, 1);
2652                 need_dirty = true;
2653         } else if (!S_ISDIR(inode->i_mode) ||
2654                    (S_ISDIR(inode->i_mode) && inode->i_nlink >= 2)) {
2655                 inc_nlink(inode);
2656                 need_dirty = true;
2657         } /* else (S_ISDIR(inode->i_mode) && inode->i_nlink == 1) { ; } */
2658
2659         LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
2660         spin_unlock(&obj->oo_guard);
2661
2662         if (need_dirty)
2663                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2664
2665         LINVRNT(osd_invariant(obj));
2666
2667         return rc;
2668 }
2669
2670 static int osd_declare_object_ref_del(const struct lu_env *env,
2671                                       struct dt_object *dt,
2672                                       struct thandle *handle)
2673 {
2674         struct osd_thandle *oh;
2675
2676         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2677         LASSERT(handle != NULL);
2678
2679         oh = container_of0(handle, struct osd_thandle, ot_super);
2680         LASSERT(oh->ot_handle == NULL);
2681
2682         osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
2683                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2684
2685         return 0;
2686 }
2687
2688 /*
2689  * Concurrency: @dt is write locked.
2690  */
2691 static int osd_object_ref_del(const struct lu_env *env, struct dt_object *dt,
2692                               struct thandle *th)
2693 {
2694         struct osd_object       *obj = osd_dt_obj(dt);
2695         struct inode            *inode = obj->oo_inode;
2696         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
2697
2698         LINVRNT(osd_invariant(obj));
2699         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2700         LASSERT(osd_write_locked(env, obj));
2701         LASSERT(th != NULL);
2702
2703         osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
2704
2705         spin_lock(&obj->oo_guard);
2706         /* That can be result of upgrade from old Lustre version and
2707          * applied only to local files.  Just skip this ref_del call.
2708          * ext4_unlink() only treats this as a warning, don't LASSERT here.*/
2709         if (inode->i_nlink == 0) {
2710                 CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
2711                              D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
2712                              ", maybe an upgraded file? (LU-3915)\n",
2713                              osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
2714                 spin_unlock(&obj->oo_guard);
2715                 return 0;
2716         }
2717
2718         /* This based on ldiskfs_dec_count(), which is not exported.
2719          *
2720          * If a directory already has nlink == 1, then do not drop the nlink
2721          * count to 0, even temporarily, to avoid race conditions with other
2722          * threads not holding oo_guard seeing i_nlink == 0 in rare cases.
2723          *
2724          * nlink == 1 means the directory has/had > EXT4_LINK_MAX subdirs.
2725          */
2726         if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 1) {
2727                 drop_nlink(inode);
2728
2729                 spin_unlock(&obj->oo_guard);
2730                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2731                 LINVRNT(osd_invariant(obj));
2732         } else {
2733                 spin_unlock(&obj->oo_guard);
2734         }
2735
2736         return 0;
2737 }
2738
2739 /*
2740  * Get the 64-bit version for an inode.
2741  */
2742 static int osd_object_version_get(const struct lu_env *env,
2743                                   struct dt_object *dt, dt_obj_version_t *ver)
2744 {
2745         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2746
2747         CDEBUG(D_INODE, "Get version "LPX64" for inode %lu\n",
2748                LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2749         *ver = LDISKFS_I(inode)->i_fs_version;
2750         return 0;
2751 }
2752
2753 /*
2754  * Concurrency: @dt is read locked.
2755  */
2756 static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
2757                          struct lu_buf *buf, const char *name,
2758                          struct lustre_capa *capa)
2759 {
2760         struct osd_object      *obj    = osd_dt_obj(dt);
2761         struct inode           *inode  = obj->oo_inode;
2762         struct osd_thread_info *info   = osd_oti_get(env);
2763         struct dentry          *dentry = &info->oti_obj_dentry;
2764
2765         /* version get is not real XATTR but uses xattr API */
2766         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2767                 /* for version we are just using xattr API but change inode
2768                  * field instead */
2769                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
2770                 osd_object_version_get(env, dt, buf->lb_buf);
2771                 return sizeof(dt_obj_version_t);
2772         }
2773
2774         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2775         LASSERT(inode->i_op != NULL && inode->i_op->getxattr != NULL);
2776
2777         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
2778                 return -EACCES;
2779
2780         return __osd_xattr_get(inode, dentry, name, buf->lb_buf, buf->lb_len);
2781 }
2782
2783
2784 static int osd_declare_xattr_set(const struct lu_env *env,
2785                                  struct dt_object *dt,
2786                                  const struct lu_buf *buf, const char *name,
2787                                  int fl, struct thandle *handle)
2788 {
2789         struct osd_thandle *oh;
2790
2791         LASSERT(handle != NULL);
2792
2793         oh = container_of0(handle, struct osd_thandle, ot_super);
2794         LASSERT(oh->ot_handle == NULL);
2795
2796         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
2797                              strcmp(name, XATTR_NAME_VERSION) == 0 ?
2798                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE] :
2799                              osd_dto_credits_noquota[DTO_XATTR_SET]);
2800
2801         return 0;
2802 }
2803
2804 /*
2805  * Set the 64-bit version for object
2806  */
2807 static void osd_object_version_set(const struct lu_env *env,
2808                                    struct dt_object *dt,
2809                                    dt_obj_version_t *new_version)
2810 {
2811         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2812
2813         CDEBUG(D_INODE, "Set version "LPX64" (old "LPX64") for inode %lu\n",
2814                *new_version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2815
2816         LDISKFS_I(inode)->i_fs_version = *new_version;
2817         /** Version is set after all inode operations are finished,
2818          *  so we should mark it dirty here */
2819         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2820 }
2821
2822 /*
2823  * Concurrency: @dt is write locked.
2824  */
2825 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
2826                          const struct lu_buf *buf, const char *name, int fl,
2827                          struct thandle *handle, struct lustre_capa *capa)
2828 {
2829         struct osd_object      *obj      = osd_dt_obj(dt);
2830         struct inode           *inode    = obj->oo_inode;
2831         struct osd_thread_info *info     = osd_oti_get(env);
2832         int                     fs_flags = 0;
2833         ENTRY;
2834
2835         LASSERT(handle != NULL);
2836
2837         /* version set is not real XATTR */
2838         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2839                 /* for version we are just using xattr API but change inode
2840                  * field instead */
2841                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
2842                 osd_object_version_set(env, dt, buf->lb_buf);
2843                 return sizeof(dt_obj_version_t);
2844         }
2845
2846         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
2847                 return -EACCES;
2848
2849         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
2850         if (fl & LU_XATTR_REPLACE)
2851                 fs_flags |= XATTR_REPLACE;
2852
2853         if (fl & LU_XATTR_CREATE)
2854                 fs_flags |= XATTR_CREATE;
2855
2856         return __osd_xattr_set(info, inode, name, buf->lb_buf, buf->lb_len,
2857                                fs_flags);
2858 }
2859
2860 /*
2861  * Concurrency: @dt is read locked.
2862  */
2863 static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
2864                           struct lu_buf *buf, struct lustre_capa *capa)
2865 {
2866         struct osd_object      *obj    = osd_dt_obj(dt);
2867         struct inode           *inode  = obj->oo_inode;
2868         struct osd_thread_info *info   = osd_oti_get(env);
2869         struct dentry          *dentry = &info->oti_obj_dentry;
2870
2871         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2872         LASSERT(inode->i_op != NULL && inode->i_op->listxattr != NULL);
2873         LASSERT(osd_read_locked(env, obj) || osd_write_locked(env, obj));
2874
2875         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
2876                 return -EACCES;
2877
2878         dentry->d_inode = inode;
2879         dentry->d_sb = inode->i_sb;
2880         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
2881 }
2882
2883 static int osd_declare_xattr_del(const struct lu_env *env,
2884                                  struct dt_object *dt, const char *name,
2885                                  struct thandle *handle)
2886 {
2887         struct osd_thandle *oh;
2888
2889         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2890         LASSERT(handle != NULL);
2891
2892         oh = container_of0(handle, struct osd_thandle, ot_super);
2893         LASSERT(oh->ot_handle == NULL);
2894
2895         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
2896                              osd_dto_credits_noquota[DTO_XATTR_SET]);
2897
2898         return 0;
2899 }
2900
2901 /*
2902  * Concurrency: @dt is write locked.
2903  */
2904 static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
2905                          const char *name, struct thandle *handle,
2906                          struct lustre_capa *capa)
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         struct dentry          *dentry = &info->oti_obj_dentry;
2912         int                     rc;
2913
2914         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2915         LASSERT(inode->i_op != NULL && inode->i_op->removexattr != NULL);
2916         LASSERT(handle != NULL);
2917
2918         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
2919                 return -EACCES;
2920
2921         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
2922
2923         ll_vfs_dq_init(inode);
2924         dentry->d_inode = inode;
2925         dentry->d_sb = inode->i_sb;
2926         rc = inode->i_op->removexattr(dentry, name);
2927         return rc;
2928 }
2929
2930 static struct obd_capa *osd_capa_get(const struct lu_env *env,
2931                                      struct dt_object *dt,
2932                                      struct lustre_capa *old, __u64 opc)
2933 {
2934         struct osd_thread_info *info = osd_oti_get(env);
2935         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
2936         struct osd_object *obj = osd_dt_obj(dt);
2937         struct osd_device *osd = osd_obj2dev(obj);
2938         struct lustre_capa_key *key = &info->oti_capa_key;
2939         struct lustre_capa *capa = &info->oti_capa;
2940         struct obd_capa *oc;
2941         struct lu_capainfo *lci;
2942         int rc;
2943         ENTRY;
2944
2945         if (!osd->od_fl_capa)
2946                 RETURN(ERR_PTR(-ENOENT));
2947
2948         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2949         LINVRNT(osd_invariant(obj));
2950
2951         /* renewal sanity check */
2952         if (old && osd_object_auth(env, dt, old, opc))
2953                 RETURN(ERR_PTR(-EACCES));
2954
2955         lci = lu_capainfo_get(env);
2956         if (unlikely(lci == NULL))
2957                 RETURN(ERR_PTR(-ENOENT));
2958
2959         switch (lci->lci_auth) {
2960         case LC_ID_NONE:
2961                 RETURN(NULL);
2962         case LC_ID_PLAIN:
2963                 capa->lc_uid = obj->oo_inode->i_uid;
2964                 capa->lc_gid = obj->oo_inode->i_gid;
2965                 capa->lc_flags = LC_ID_PLAIN;
2966                 break;
2967         case LC_ID_CONVERT: {
2968                 __u32 d[4], s[4];
2969
2970                 s[0] = obj->oo_inode->i_uid;
2971                 cfs_get_random_bytes(&(s[1]), sizeof(__u32));
2972                 s[2] = obj->oo_inode->i_gid;
2973                 cfs_get_random_bytes(&(s[3]), sizeof(__u32));
2974                 rc = capa_encrypt_id(d, s, key->lk_key, CAPA_HMAC_KEY_MAX_LEN);
2975                 if (unlikely(rc))
2976                         RETURN(ERR_PTR(rc));
2977
2978                 capa->lc_uid   = ((__u64)d[1] << 32) | d[0];
2979                 capa->lc_gid   = ((__u64)d[3] << 32) | d[2];
2980                 capa->lc_flags = LC_ID_CONVERT;
2981                 break;
2982         }
2983         default:
2984                 RETURN(ERR_PTR(-EINVAL));
2985         }
2986
2987         capa->lc_fid = *fid;
2988         capa->lc_opc = opc;
2989         capa->lc_flags |= osd->od_capa_alg << 24;
2990         capa->lc_timeout = osd->od_capa_timeout;
2991         capa->lc_expiry = 0;
2992
2993         oc = capa_lookup(osd->od_capa_hash, capa, 1);
2994         if (oc) {
2995                 LASSERT(!capa_is_expired(oc));
2996                 RETURN(oc);
2997         }
2998
2999         spin_lock(&capa_lock);
3000         *key = osd->od_capa_keys[1];
3001         spin_unlock(&capa_lock);
3002
3003         capa->lc_keyid = key->lk_keyid;
3004         capa->lc_expiry = cfs_time_current_sec() + osd->od_capa_timeout;
3005
3006         rc = capa_hmac(capa->lc_hmac, capa, key->lk_key);
3007         if (rc) {
3008                 DEBUG_CAPA(D_ERROR, capa, "HMAC failed: %d for", rc);
3009                 RETURN(ERR_PTR(rc));
3010         }
3011
3012         oc = capa_add(osd->od_capa_hash, capa);
3013         RETURN(oc);
3014 }
3015
3016 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt)
3017 {
3018         struct osd_object       *obj    = osd_dt_obj(dt);
3019         struct inode            *inode  = obj->oo_inode;
3020         struct osd_thread_info  *info   = osd_oti_get(env);
3021         struct dentry           *dentry = &info->oti_obj_dentry;
3022         struct file             *file   = &info->oti_file;
3023         int                     rc;
3024
3025         ENTRY;
3026
3027         dentry->d_inode = inode;
3028         dentry->d_sb = inode->i_sb;
3029         file->f_dentry = dentry;
3030         file->f_mapping = inode->i_mapping;
3031         file->f_op = inode->i_fop;
3032         set_file_inode(file, inode);
3033 #ifndef HAVE_FILE_FSYNC_4ARGS
3034         mutex_lock(&inode->i_mutex);
3035 #endif
3036         rc = do_fsync(file, 0);
3037 #ifndef HAVE_FILE_FSYNC_4ARGS
3038         mutex_unlock(&inode->i_mutex);
3039 #endif
3040         RETURN(rc);
3041 }
3042
3043 static int osd_data_get(const struct lu_env *env, struct dt_object *dt,
3044                         void **data)
3045 {
3046         struct osd_object *obj = osd_dt_obj(dt);
3047         ENTRY;
3048
3049         *data = (void *)obj->oo_inode;
3050         RETURN(0);
3051 }
3052
3053 /*
3054  * Index operations.
3055  */
3056
3057 static int osd_iam_index_probe(const struct lu_env *env, struct osd_object *o,
3058                            const struct dt_index_features *feat)
3059 {
3060         struct iam_descr *descr;
3061
3062         if (osd_object_is_root(o))
3063                 return feat == &dt_directory_features;
3064
3065         LASSERT(o->oo_dir != NULL);
3066
3067         descr = o->oo_dir->od_container.ic_descr;
3068         if (feat == &dt_directory_features) {
3069                 if (descr->id_rec_size == sizeof(struct osd_fid_pack))
3070                         return 1;
3071                 else
3072                         return 0;
3073         } else {
3074                 return
3075                         feat->dif_keysize_min <= descr->id_key_size &&
3076                         descr->id_key_size <= feat->dif_keysize_max &&
3077                         feat->dif_recsize_min <= descr->id_rec_size &&
3078                         descr->id_rec_size <= feat->dif_recsize_max &&
3079                         !(feat->dif_flags & (DT_IND_VARKEY |
3080                                              DT_IND_VARREC | DT_IND_NONUNQ)) &&
3081                         ergo(feat->dif_flags & DT_IND_UPDATE,
3082                              1 /* XXX check that object (and file system) is
3083                                 * writable */);
3084         }
3085 }
3086
3087 static int osd_iam_container_init(const struct lu_env *env,
3088                                   struct osd_object *obj,
3089                                   struct osd_directory *dir)
3090 {
3091         struct iam_container *bag = &dir->od_container;
3092         int result;
3093
3094         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
3095         if (result != 0)
3096                 return result;
3097
3098         result = iam_container_setup(bag);
3099         if (result == 0)
3100                 obj->oo_dt.do_index_ops = &osd_index_iam_ops;
3101         else
3102                 iam_container_fini(bag);
3103
3104         return result;
3105 }
3106
3107
3108 /*
3109  * Concurrency: no external locking is necessary.
3110  */
3111 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
3112                          const struct dt_index_features *feat)
3113 {
3114         int                      result;
3115         int                      skip_iam = 0;
3116         struct osd_object       *obj = osd_dt_obj(dt);
3117
3118         LINVRNT(osd_invariant(obj));
3119
3120         if (osd_object_is_root(obj)) {
3121                 dt->do_index_ops = &osd_index_ea_ops;
3122                 result = 0;
3123         } else if (feat == &dt_directory_features) {
3124                 dt->do_index_ops = &osd_index_ea_ops;
3125                 if (obj->oo_inode != NULL && S_ISDIR(obj->oo_inode->i_mode))
3126                         result = 0;
3127                 else
3128                         result = -ENOTDIR;
3129                 skip_iam = 1;
3130         } else if (unlikely(feat == &dt_otable_features)) {
3131                 dt->do_index_ops = &osd_otable_ops;
3132                 return 0;
3133         } else if (unlikely(feat == &dt_acct_features)) {
3134                 dt->do_index_ops = &osd_acct_index_ops;
3135                 result = 0;
3136                 skip_iam = 1;
3137         } else if (!osd_has_index(obj)) {
3138                 struct osd_directory *dir;
3139
3140                 OBD_ALLOC_PTR(dir);
3141                 if (dir != NULL) {
3142
3143                         spin_lock(&obj->oo_guard);
3144                         if (obj->oo_dir == NULL)
3145                                 obj->oo_dir = dir;
3146                         else
3147                                 /*
3148                                  * Concurrent thread allocated container data.
3149                                  */
3150                                 OBD_FREE_PTR(dir);
3151                         spin_unlock(&obj->oo_guard);
3152                         /*
3153                          * Now, that we have container data, serialize its
3154                          * initialization.
3155                          */
3156                         down_write(&obj->oo_ext_idx_sem);
3157                         /*
3158                          * recheck under lock.
3159                          */
3160                         if (!osd_has_index(obj))
3161                                 result = osd_iam_container_init(env, obj, dir);
3162                         else
3163                                 result = 0;
3164                         up_write(&obj->oo_ext_idx_sem);
3165                 } else {
3166                         result = -ENOMEM;
3167                 }
3168         } else {
3169                 result = 0;
3170         }
3171
3172         if (result == 0 && skip_iam == 0) {
3173                 if (!osd_iam_index_probe(env, obj, feat))
3174                         result = -ENOTDIR;
3175         }
3176         LINVRNT(osd_invariant(obj));
3177
3178         if (result == 0 && is_quota_glb_feat(feat) &&
3179             fid_seq(lu_object_fid(&dt->do_lu)) == FID_SEQ_QUOTA_GLB)
3180                 result = osd_quota_migration(env, dt, feat);
3181
3182         return result;
3183 }
3184
3185 static int osd_otable_it_attr_get(const struct lu_env *env,
3186                                  struct dt_object *dt,
3187                                  struct lu_attr *attr,
3188                                  struct lustre_capa *capa)
3189 {
3190         attr->la_valid = 0;
3191         return 0;
3192 }
3193
3194 static const struct dt_object_operations osd_obj_ops = {
3195         .do_read_lock         = osd_object_read_lock,
3196         .do_write_lock        = osd_object_write_lock,
3197         .do_read_unlock       = osd_object_read_unlock,
3198         .do_write_unlock      = osd_object_write_unlock,
3199         .do_write_locked      = osd_object_write_locked,
3200         .do_attr_get          = osd_attr_get,
3201         .do_declare_attr_set  = osd_declare_attr_set,
3202         .do_attr_set          = osd_attr_set,
3203         .do_ah_init           = osd_ah_init,
3204         .do_declare_create    = osd_declare_object_create,
3205         .do_create            = osd_object_create,
3206         .do_declare_destroy   = osd_declare_object_destroy,
3207         .do_destroy           = osd_object_destroy,
3208         .do_index_try         = osd_index_try,
3209         .do_declare_ref_add   = osd_declare_object_ref_add,
3210         .do_ref_add           = osd_object_ref_add,
3211         .do_declare_ref_del   = osd_declare_object_ref_del,
3212         .do_ref_del           = osd_object_ref_del,
3213         .do_xattr_get         = osd_xattr_get,
3214         .do_declare_xattr_set = osd_declare_xattr_set,
3215         .do_xattr_set         = osd_xattr_set,
3216         .do_declare_xattr_del = osd_declare_xattr_del,
3217         .do_xattr_del         = osd_xattr_del,
3218         .do_xattr_list        = osd_xattr_list,
3219         .do_capa_get          = osd_capa_get,
3220         .do_object_sync       = osd_object_sync,
3221         .do_data_get          = osd_data_get,
3222 };
3223
3224 /**
3225  * dt_object_operations for interoperability mode
3226  * (i.e. to run 2.0 mds on 1.8 disk) (b11826)
3227  */
3228 static const struct dt_object_operations osd_obj_ea_ops = {
3229         .do_read_lock         = osd_object_read_lock,
3230         .do_write_lock        = osd_object_write_lock,
3231         .do_read_unlock       = osd_object_read_unlock,
3232         .do_write_unlock      = osd_object_write_unlock,
3233         .do_write_locked      = osd_object_write_locked,
3234         .do_attr_get          = osd_attr_get,
3235         .do_declare_attr_set  = osd_declare_attr_set,
3236         .do_attr_set          = osd_attr_set,
3237         .do_ah_init           = osd_ah_init,
3238         .do_declare_create    = osd_declare_object_create,
3239         .do_create            = osd_object_ea_create,
3240         .do_declare_destroy   = osd_declare_object_destroy,
3241         .do_destroy           = osd_object_destroy,
3242         .do_index_try         = osd_index_try,
3243         .do_declare_ref_add   = osd_declare_object_ref_add,
3244         .do_ref_add           = osd_object_ref_add,
3245         .do_declare_ref_del   = osd_declare_object_ref_del,
3246         .do_ref_del           = osd_object_ref_del,
3247         .do_xattr_get         = osd_xattr_get,
3248         .do_declare_xattr_set = osd_declare_xattr_set,
3249         .do_xattr_set         = osd_xattr_set,
3250         .do_declare_xattr_del = osd_declare_xattr_del,
3251         .do_xattr_del         = osd_xattr_del,
3252         .do_xattr_list        = osd_xattr_list,
3253         .do_capa_get          = osd_capa_get,
3254         .do_object_sync       = osd_object_sync,
3255         .do_data_get          = osd_data_get,
3256 };
3257
3258 static const struct dt_object_operations osd_obj_otable_it_ops = {
3259         .do_attr_get    = osd_otable_it_attr_get,
3260         .do_index_try   = osd_index_try,
3261 };
3262
3263 static int osd_index_declare_iam_delete(const struct lu_env *env,
3264                                         struct dt_object *dt,
3265                                         const struct dt_key *key,
3266                                         struct thandle *handle)
3267 {
3268         struct osd_thandle    *oh;
3269
3270         oh = container_of0(handle, struct osd_thandle, ot_super);
3271         LASSERT(oh->ot_handle == NULL);
3272
3273         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3274                              osd_dto_credits_noquota[DTO_INDEX_DELETE]);
3275
3276         return 0;
3277 }
3278
3279 /**
3280  *      delete a (key, value) pair from index \a dt specified by \a key
3281  *
3282  *      \param  dt      osd index object
3283  *      \param  key     key for index
3284  *      \param  rec     record reference
3285  *      \param  handle  transaction handler
3286  *
3287  *      \retval  0  success
3288  *      \retval -ve   failure
3289  */
3290
3291 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
3292                                 const struct dt_key *key,
3293                                 struct thandle *handle,
3294                                 struct lustre_capa *capa)
3295 {
3296         struct osd_thread_info *oti = osd_oti_get(env);
3297         struct osd_object      *obj = osd_dt_obj(dt);
3298         struct osd_thandle     *oh;
3299         struct iam_path_descr  *ipd;
3300         struct iam_container   *bag = &obj->oo_dir->od_container;
3301         int                     rc;
3302
3303         ENTRY;
3304
3305         LINVRNT(osd_invariant(obj));
3306         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3307         LASSERT(bag->ic_object == obj->oo_inode);
3308         LASSERT(handle != NULL);
3309
3310         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
3311                 RETURN(-EACCES);
3312
3313         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
3314
3315         ipd = osd_idx_ipd_get(env, bag);
3316         if (unlikely(ipd == NULL))
3317                 RETURN(-ENOMEM);
3318
3319         oh = container_of0(handle, struct osd_thandle, ot_super);
3320         LASSERT(oh->ot_handle != NULL);
3321         LASSERT(oh->ot_handle->h_transaction != NULL);
3322
3323         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
3324                 /* swab quota uid/gid provided by caller */
3325                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
3326                 key = (const struct dt_key *)&oti->oti_quota_id;
3327         }
3328
3329         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
3330         osd_ipd_put(env, bag, ipd);
3331         LINVRNT(osd_invariant(obj));
3332         RETURN(rc);
3333 }
3334
3335 static int osd_index_declare_ea_delete(const struct lu_env *env,
3336                                        struct dt_object *dt,
3337                                        const struct dt_key *key,
3338                                        struct thandle *handle)
3339 {
3340         struct osd_thandle *oh;
3341         struct inode       *inode;
3342         int                 rc;
3343         ENTRY;
3344
3345         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3346         LASSERT(handle != NULL);
3347
3348         oh = container_of0(handle, struct osd_thandle, ot_super);
3349         LASSERT(oh->ot_handle == NULL);
3350
3351         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3352                              osd_dto_credits_noquota[DTO_INDEX_DELETE]);
3353
3354         inode = osd_dt_obj(dt)->oo_inode;
3355         LASSERT(inode);
3356
3357         rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, 0, oh,
3358                                    true, true, NULL, false);
3359         RETURN(rc);
3360 }
3361
3362 static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
3363                                           struct dt_rec *fid)
3364 {
3365         struct osd_fid_pack *rec;
3366         int                  rc = -ENODATA;
3367
3368         if (de->file_type & LDISKFS_DIRENT_LUFID) {
3369                 rec = (struct osd_fid_pack *) (de->name + de->name_len + 1);
3370                 rc = osd_fid_unpack((struct lu_fid *)fid, rec);
3371         }
3372         return rc;
3373 }
3374
3375 static int osd_mdt_seq_exists(const struct lu_env *env,
3376                               struct osd_device *osd, obd_seq seq)
3377 {
3378         struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
3379         struct seq_server_site  *ss = osd_seq_site(osd);
3380         int                     rc;
3381         ENTRY;
3382
3383         if (ss == NULL)
3384                 RETURN(1);
3385
3386         /* XXX: currently, each MDT only store avaible sequence on disk, and no
3387          * allocated sequences information on disk, so we have to lookup FLDB,
3388          * but it probably makes more sense also store allocated sequence
3389          * locally, so we do not need do remote FLDB lookup in OSD */
3390         rc = osd_fld_lookup(env, osd, seq, range);
3391         if (rc != 0) {
3392                 CERROR("%s: Can not lookup fld for "LPX64"\n",
3393                        osd_name(osd), seq);
3394                 RETURN(0);
3395         }
3396
3397         RETURN(ss->ss_node_id == range->lsr_index);
3398 }
3399
3400 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
3401                           struct lu_fid *fid)
3402 {
3403         ENTRY;
3404
3405         /* FID seqs not in FLDB, must be local seq */
3406         if (unlikely(!fid_seq_in_fldb(fid_seq(fid))))
3407                 RETURN(0);
3408
3409         /* Currently only check this for FID on MDT */
3410         if (osd_mdt_seq_exists(env, osd, fid_seq(fid)))
3411                 RETURN(0);
3412
3413         RETURN(1);
3414 }
3415
3416 /**
3417  * Index delete function for interoperability mode (b11826).
3418  * It will remove the directory entry added by osd_index_ea_insert().
3419  * This entry is needed to maintain name->fid mapping.
3420  *
3421  * \param key,  key i.e. file entry to be deleted
3422  *
3423  * \retval   0, on success
3424  * \retval -ve, on error
3425  */
3426 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
3427                                const struct dt_key *key,
3428                                struct thandle *handle,
3429                                struct lustre_capa *capa)
3430 {
3431         struct osd_object          *obj    = osd_dt_obj(dt);
3432         struct inode               *dir    = obj->oo_inode;
3433         struct dentry              *dentry;
3434         struct osd_thandle         *oh;
3435         struct ldiskfs_dir_entry_2 *de = NULL;
3436         struct buffer_head         *bh;
3437         struct htree_lock          *hlock = NULL;
3438         struct lu_fid              *fid = &osd_oti_get(env)->oti_fid;
3439         struct osd_device          *osd = osd_dev(dt->do_lu.lo_dev);
3440         int                        rc;
3441         ENTRY;
3442
3443         LINVRNT(osd_invariant(obj));
3444         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3445         LASSERT(handle != NULL);
3446
3447         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
3448
3449         oh = container_of(handle, struct osd_thandle, ot_super);
3450         LASSERT(oh->ot_handle != NULL);
3451         LASSERT(oh->ot_handle->h_transaction != NULL);
3452
3453         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
3454                 RETURN(-EACCES);
3455
3456         ll_vfs_dq_init(dir);
3457         dentry = osd_child_dentry_get(env, obj,
3458                                       (char *)key, strlen((char *)key));
3459
3460         if (obj->oo_hl_head != NULL) {
3461                 hlock = osd_oti_get(env)->oti_hlock;
3462                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
3463                                    dir, LDISKFS_HLOCK_DEL);
3464         } else {
3465                 down_write(&obj->oo_ext_idx_sem);
3466         }
3467
3468         bh = ldiskfs_find_entry(dir, &dentry->d_name, &de, hlock);
3469         if (bh) {
3470                 __u32 ino = 0;
3471
3472                 /* If this is not the ".." entry, it might be a remote DNE
3473                  * entry and  we need to check if the FID is for a remote
3474                  * MDT.  If the FID is  not in the directory entry (e.g.
3475                  * upgraded 1.8 filesystem without dirdata enabled) then
3476                  * we need to get the FID from the LMA. For a remote directory
3477                  * there HAS to be an LMA, it cannot be an IGIF inode in this
3478                  * case.
3479                  *
3480                  * Delete the entry before the agent inode in order to
3481                  * simplify error handling.  At worst an error after deleting
3482                  * the entry first might leak the agent inode afterward. The
3483                  * reverse would need filesystem abort in case of error deleting
3484                  * the entry after the agent had been removed, or leave a
3485                  * dangling entry pointing at a random inode. */
3486                 if (strcmp((char *)key, dotdot) != 0) {
3487                         LASSERT(de != NULL);
3488                         rc = osd_get_fid_from_dentry(de, (struct dt_rec *)fid);
3489                         /* If Fid is not in dentry, try to get it from LMA */
3490                         if (rc == -ENODATA) {
3491                                 struct osd_inode_id *id;
3492                                 struct inode *inode;
3493
3494                                 /* Before trying to get fid from the inode,
3495                                  * check whether the inode is valid.
3496                                  *
3497                                  * If the inode has been deleted, do not go
3498                                  * ahead to do osd_ea_fid_get, which will set
3499                                  * the inode to bad inode, which might cause
3500                                  * the inode to be deleted uncorrectly */
3501                                 inode = ldiskfs_iget(osd_sb(osd),
3502                                                      le32_to_cpu(de->inode));
3503                                 if (IS_ERR(inode)) {
3504                                         CDEBUG(D_INODE, "%s: "DFID"get inode"
3505                                                "error.\n", osd_name(osd),
3506                                                PFID(fid));
3507                                         rc = PTR_ERR(inode);
3508                                 } else {
3509                                         if (likely(inode->i_nlink != 0)) {
3510                                                 id = &osd_oti_get(env)->oti_id;
3511                                                 rc = osd_ea_fid_get(env, obj,
3512                                                         le32_to_cpu(de->inode),
3513                                                                     fid, id);
3514                                         } else {
3515                                                 CDEBUG(D_INFO, "%s: %u "DFID
3516                                                        "deleted.\n",
3517                                                        osd_name(osd),
3518                                                        le32_to_cpu(de->inode),
3519                                                        PFID(fid));
3520                                                 rc = -ESTALE;
3521                                         }
3522                                         iput(inode);
3523                                 }
3524                         }
3525                         if (rc == 0 &&
3526                             unlikely(osd_remote_fid(env, osd, fid)))
3527                                 /* Need to delete agent inode */
3528                                 ino = le32_to_cpu(de->inode);
3529                 }
3530                 rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
3531                 brelse(bh);
3532                 if (rc == 0 && unlikely(ino != 0)) {
3533                         rc = osd_delete_local_agent_inode(env, osd, fid, ino,
3534                                                           oh);
3535                         if (rc != 0)
3536                                 CERROR("%s: del local inode "DFID": rc = %d\n",
3537                                        osd_name(osd), PFID(fid), rc);
3538                 }
3539         } else {
3540                 rc = -ENOENT;
3541         }
3542         if (hlock != NULL)
3543                 ldiskfs_htree_unlock(hlock);
3544         else
3545                 up_write(&obj->oo_ext_idx_sem);
3546
3547         if (rc != 0)
3548                 GOTO(out, rc);
3549
3550         /* For inode on the remote MDT, .. will point to
3551          * /Agent directory, Check whether it needs to delete
3552          * from agent directory */
3553         if (unlikely(strcmp((char *)key, dotdot) == 0)) {
3554                 rc = osd_delete_from_remote_parent(env, osd_obj2dev(obj), obj,
3555                                                    oh);
3556                 if (rc != 0 && rc != -ENOENT) {
3557                         CERROR("%s: delete agent inode "DFID": rc = %d\n",
3558                                osd_name(osd), PFID(fid), rc);
3559                 }
3560
3561                 if (rc == -ENOENT)
3562                         rc = 0;
3563
3564                 GOTO(out, rc);
3565         }
3566 out:
3567
3568         LASSERT(osd_invariant(obj));
3569         RETURN(rc);
3570 }
3571
3572 /**
3573  *      Lookup index for \a key and copy record to \a rec.
3574  *
3575  *      \param  dt      osd index object
3576  *      \param  key     key for index
3577  *      \param  rec     record reference
3578  *
3579  *      \retval  +ve  success : exact mach
3580  *      \retval  0    return record with key not greater than \a key
3581  *      \retval -ve   failure
3582  */
3583 static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
3584                                 struct dt_rec *rec, const struct dt_key *key,
3585                                 struct lustre_capa *capa)
3586 {
3587         struct osd_object      *obj = osd_dt_obj(dt);
3588         struct iam_path_descr  *ipd;
3589         struct iam_container   *bag = &obj->oo_dir->od_container;
3590         struct osd_thread_info *oti = osd_oti_get(env);
3591         struct iam_iterator    *it = &oti->oti_idx_it;
3592         struct iam_rec         *iam_rec;
3593         int                     rc;
3594
3595         ENTRY;
3596
3597         LASSERT(osd_invariant(obj));
3598         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3599         LASSERT(bag->ic_object == obj->oo_inode);
3600
3601         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_LOOKUP))
3602                 RETURN(-EACCES);
3603
3604         ipd = osd_idx_ipd_get(env, bag);
3605         if (IS_ERR(ipd))
3606                 RETURN(-ENOMEM);
3607
3608         /* got ipd now we can start iterator. */
3609         iam_it_init(it, bag, 0, ipd);
3610
3611         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
3612                 /* swab quota uid/gid provided by caller */
3613                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
3614                 key = (const struct dt_key *)&oti->oti_quota_id;
3615         }
3616
3617         rc = iam_it_get(it, (struct iam_key *)key);
3618         if (rc >= 0) {
3619                 if (S_ISDIR(obj->oo_inode->i_mode))
3620                         iam_rec = (struct iam_rec *)oti->oti_ldp;
3621                 else
3622                         iam_rec = (struct iam_rec *) rec;
3623
3624                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)iam_rec);
3625
3626                 if (S_ISDIR(obj->oo_inode->i_mode))
3627                         osd_fid_unpack((struct lu_fid *) rec,
3628                                        (struct osd_fid_pack *)iam_rec);
3629                 else if (fid_is_quota(lu_object_fid(&dt->do_lu)))
3630                         osd_quota_unpack(obj, rec);
3631         }
3632
3633         iam_it_put(it);
3634         iam_it_fini(it);
3635         osd_ipd_put(env, bag, ipd);
3636
3637         LINVRNT(osd_invariant(obj));
3638
3639         RETURN(rc);
3640 }
3641
3642 static int osd_index_declare_iam_insert(const struct lu_env *env,
3643                                         struct dt_object *dt,
3644                                         const struct dt_rec *rec,
3645                                         const struct dt_key *key,
3646                                         struct thandle *handle)
3647 {
3648         struct osd_thandle *oh;
3649
3650         LASSERT(handle != NULL);
3651
3652         oh = container_of0(handle, struct osd_thandle, ot_super);
3653         LASSERT(oh->ot_handle == NULL);
3654
3655         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3656                              osd_dto_credits_noquota[DTO_INDEX_INSERT]);
3657
3658         return 0;
3659 }
3660
3661 /**
3662  *      Inserts (key, value) pair in \a dt index object.
3663  *
3664  *      \param  dt      osd index object
3665  *      \param  key     key for index
3666  *      \param  rec     record reference
3667  *      \param  th      transaction handler
3668  *
3669  *      \retval  0  success
3670  *      \retval -ve failure
3671  */
3672 static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
3673                                 const struct dt_rec *rec,
3674                                 const struct dt_key *key, struct thandle *th,
3675                                 struct lustre_capa *capa, int ignore_quota)
3676 {
3677         struct osd_object     *obj = osd_dt_obj(dt);
3678         struct iam_path_descr *ipd;
3679         struct osd_thandle    *oh;
3680         struct iam_container  *bag = &obj->oo_dir->od_container;
3681         struct osd_thread_info *oti = osd_oti_get(env);
3682         struct iam_rec         *iam_rec;
3683         int                     rc;
3684
3685         ENTRY;
3686
3687         LINVRNT(osd_invariant(obj));
3688         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3689         LASSERT(bag->ic_object == obj->oo_inode);
3690         LASSERT(th != NULL);
3691
3692         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
3693                 RETURN(-EACCES);
3694
3695         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3696
3697         ipd = osd_idx_ipd_get(env, bag);
3698         if (unlikely(ipd == NULL))
3699                 RETURN(-ENOMEM);
3700
3701         oh = container_of0(th, struct osd_thandle, ot_super);
3702         LASSERT(oh->ot_handle != NULL);
3703         LASSERT(oh->ot_handle->h_transaction != NULL);
3704         if (S_ISDIR(obj->oo_inode->i_mode)) {
3705                 iam_rec = (struct iam_rec *)oti->oti_ldp;
3706                 osd_fid_pack((struct osd_fid_pack *)iam_rec, rec, &oti->oti_fid);
3707         } else if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
3708                 /* pack quota uid/gid */
3709                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
3710                 key = (const struct dt_key *)&oti->oti_quota_id;
3711                 /* pack quota record */
3712                 rec = osd_quota_pack(obj, rec, &oti->oti_quota_rec);
3713                 iam_rec = (struct iam_rec *)rec;
3714         } else {
3715                 iam_rec = (struct iam_rec *)rec;
3716         }
3717
3718         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
3719                         iam_rec, ipd);
3720         osd_ipd_put(env, bag, ipd);
3721         LINVRNT(osd_invariant(obj));
3722         RETURN(rc);
3723 }
3724
3725 /**
3726  * Calls ldiskfs_add_entry() to add directory entry
3727  * into the directory. This is required for
3728  * interoperability mode (b11826)
3729  *
3730  * \retval   0, on success
3731  * \retval -ve, on error
3732  */
3733 static int __osd_ea_add_rec(struct osd_thread_info *info,
3734                             struct osd_object *pobj, struct inode  *cinode,
3735                             const char *name, const struct dt_rec *fid,
3736                             struct htree_lock *hlock, struct thandle *th)
3737 {
3738         struct ldiskfs_dentry_param *ldp;
3739         struct dentry               *child;
3740         struct osd_thandle          *oth;
3741         int                          rc;
3742
3743         oth = container_of(th, struct osd_thandle, ot_super);
3744         LASSERT(oth->ot_handle != NULL);
3745         LASSERT(oth->ot_handle->h_transaction != NULL);
3746         LASSERT(pobj->oo_inode);
3747
3748         ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
3749         if (unlikely(pobj->oo_inode ==
3750                      osd_sb(osd_obj2dev(pobj))->s_root->d_inode))
3751                 ldp->edp_magic = 0;
3752         else
3753                 osd_get_ldiskfs_dirent_param(ldp, fid);
3754         child = osd_child_dentry_get(info->oti_env, pobj, name, strlen(name));
3755         child->d_fsdata = (void *)ldp;
3756         ll_vfs_dq_init(pobj->oo_inode);
3757         rc = osd_ldiskfs_add_entry(oth->ot_handle, child, cinode, hlock);
3758
3759         RETURN(rc);
3760 }
3761
3762 /**
3763  * Calls ldiskfs_add_dot_dotdot() to add dot and dotdot entries
3764  * into the directory.Also sets flags into osd object to
3765  * indicate dot and dotdot are created. This is required for
3766  * interoperability mode (b11826)
3767  *
3768  * \param dir   directory for dot and dotdot fixup.
3769  * \param obj   child object for linking
3770  *
3771  * \retval   0, on success
3772  * \retval -ve, on error
3773  */
3774 static int osd_add_dot_dotdot(struct osd_thread_info *info,
3775                               struct osd_object *dir,
3776                               struct inode  *parent_dir, const char *name,
3777                               const struct dt_rec *dot_fid,
3778                               const struct dt_rec *dot_dot_fid,
3779                               struct thandle *th)
3780 {
3781         struct inode                *inode = dir->oo_inode;
3782         struct osd_thandle          *oth;
3783         int result = 0;
3784
3785         oth = container_of(th, struct osd_thandle, ot_super);
3786         LASSERT(oth->ot_handle->h_transaction != NULL);
3787         LASSERT(S_ISDIR(dir->oo_inode->i_mode));
3788
3789         if (strcmp(name, dot) == 0) {
3790                 if (dir->oo_compat_dot_created) {
3791                         result = -EEXIST;
3792                 } else {
3793                         LASSERT(inode == parent_dir);
3794                         dir->oo_compat_dot_created = 1;
3795                         result = 0;
3796                 }
3797         } else if (strcmp(name, dotdot) == 0) {
3798                 if (!dir->oo_compat_dot_created)
3799                         return -EINVAL;
3800                 /* in case of rename, dotdot is already created */
3801                 if (dir->oo_compat_dotdot_created) {
3802                         return __osd_ea_add_rec(info, dir, parent_dir, name,
3803                                                 dot_dot_fid, NULL, th);
3804                 }
3805
3806                 result = osd_add_dot_dotdot_internal(info, dir->oo_inode,
3807                                                 parent_dir, dot_fid,
3808                                                 dot_dot_fid, oth);
3809                 if (result == 0)
3810                         dir->oo_compat_dotdot_created = 1;
3811         }
3812
3813         return result;
3814 }
3815
3816
3817 /**
3818  * It will call the appropriate osd_add* function and return the
3819  * value, return by respective functions.
3820  */
3821 static int osd_ea_add_rec(const struct lu_env *env, struct osd_object *pobj,
3822                           struct inode *cinode, const char *name,
3823                           const struct dt_rec *fid, struct thandle *th)
3824 {
3825         struct osd_thread_info *info   = osd_oti_get(env);
3826         struct htree_lock      *hlock;
3827         int                     rc;
3828
3829         hlock = pobj->oo_hl_head != NULL ? info->oti_hlock : NULL;
3830
3831         if (name[0] == '.' && (name[1] == '\0' || (name[1] == '.' &&
3832                                                    name[2] =='\0'))) {
3833                 if (hlock != NULL) {
3834                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
3835                                            pobj->oo_inode, 0);
3836                 } else {
3837                         down_write(&pobj->oo_ext_idx_sem);
3838                 }
3839                 rc = osd_add_dot_dotdot(info, pobj, cinode, name,
3840                      (struct dt_rec *)lu_object_fid(&pobj->oo_dt.do_lu),
3841                                         fid, th);
3842         } else {
3843                 if (hlock != NULL) {
3844                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
3845                                            pobj->oo_inode, LDISKFS_HLOCK_ADD);
3846                 } else {
3847                         down_write(&pobj->oo_ext_idx_sem);
3848                 }
3849
3850                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_INDIR)) {
3851                         struct lu_fid *tfid = &info->oti_fid;
3852
3853                         *tfid = *(const struct lu_fid *)fid;
3854                         tfid->f_ver = ~0;
3855                         rc = __osd_ea_add_rec(info, pobj, cinode, name,
3856                                               (const struct dt_rec *)tfid,
3857                                               hlock, th);
3858                 } else {
3859                         rc = __osd_ea_add_rec(info, pobj, cinode, name, fid,
3860                                               hlock, th);
3861                 }
3862         }
3863         if (hlock != NULL)
3864                 ldiskfs_htree_unlock(hlock);
3865         else
3866                 up_write(&pobj->oo_ext_idx_sem);
3867
3868         return rc;
3869 }
3870
3871 static void
3872 osd_consistency_check(struct osd_thread_info *oti, struct osd_device *dev,
3873                       struct osd_idmap_cache *oic)
3874 {
3875         struct osd_scrub    *scrub = &dev->od_scrub;
3876         struct lu_fid       *fid   = &oic->oic_fid;
3877         struct osd_inode_id *id    = &oti->oti_id;
3878         int                  once  = 0;
3879         int                  rc;
3880         ENTRY;
3881
3882         if (!fid_is_norm(fid) && !fid_is_igif(fid))
3883                 RETURN_EXIT;
3884
3885 again:
3886         rc = osd_oi_lookup(oti, dev, fid, id, OI_CHECK_FLD);
3887         if (rc != 0 && rc != -ENOENT)
3888                 RETURN_EXIT;
3889
3890         if (rc == 0 && osd_id_eq(id, &oic->oic_lid))
3891                 RETURN_EXIT;
3892
3893         if (thread_is_running(&scrub->os_thread)) {
3894                 rc = osd_oii_insert(dev, oic, rc == -ENOENT);
3895                 /* There is race condition between osd_oi_lookup and OI scrub.
3896                  * The OI scrub finished just after osd_oi_lookup() failure.
3897                  * Under such case, it is unnecessary to trigger OI scrub again,
3898                  * but try to call osd_oi_lookup() again. */
3899                 if (unlikely(rc == -EAGAIN))
3900                         goto again;
3901
3902                 RETURN_EXIT;
3903         }
3904
3905         if (!dev->od_noscrub && ++once == 1) {
3906                 CDEBUG(D_LFSCK, "Trigger OI scrub by RPC for "DFID"\n",
3907                        PFID(fid));
3908                 rc = osd_scrub_start(dev);
3909                 LCONSOLE_ERROR("%.16s: trigger OI scrub by RPC for "DFID
3910                                ", rc = %d [2]\n",
3911                                LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
3912                                PFID(fid), rc);
3913                 if (rc == 0)
3914                         goto again;
3915         }
3916
3917         EXIT;
3918 }
3919
3920 static int osd_fail_fid_lookup(struct osd_thread_info *oti,
3921                                struct osd_device *dev,
3922                                struct osd_idmap_cache *oic,
3923                                struct lu_fid *fid, __u32 ino)
3924 {
3925         struct lustre_mdt_attrs *lma   = &oti->oti_mdt_attrs;
3926         struct inode            *inode;
3927         int                      rc;
3928
3929         osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
3930         inode = osd_iget(oti, dev, &oic->oic_lid);
3931         if (IS_ERR(inode)) {
3932                 fid_zero(&oic->oic_fid);
3933                 return PTR_ERR(inode);
3934         }
3935
3936         rc = osd_get_lma(oti, inode, &oti->oti_obj_dentry, lma);
3937         iput(inode);
3938         if (rc != 0)
3939                 fid_zero(&oic->oic_fid);
3940         else
3941                 *fid = oic->oic_fid = lma->lma_self_fid;
3942         return rc;
3943 }
3944
3945 int osd_add_oi_cache(struct osd_thread_info *info, struct osd_device *osd,
3946                      struct osd_inode_id *id, const struct lu_fid *fid)
3947 {
3948         CDEBUG(D_INODE, "add "DFID" %u:%u to info %p\n", PFID(fid),
3949                id->oii_ino, id->oii_gen, info);
3950         info->oti_cache.oic_lid = *id;
3951         info->oti_cache.oic_fid = *fid;
3952         info->oti_cache.oic_dev = osd;
3953
3954         return 0;
3955 }
3956
3957 /**
3958  * Calls ->lookup() to find dentry. From dentry get inode and
3959  * read inode's ea to get fid. This is required for  interoperability
3960  * mode (b11826)
3961  *
3962  * \retval   0, on success
3963  * \retval -ve, on error
3964  */
3965 static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
3966                              struct dt_rec *rec, const struct dt_key *key)
3967 {
3968         struct inode               *dir    = obj->oo_inode;
3969         struct dentry              *dentry;
3970         struct ldiskfs_dir_entry_2 *de;
3971         struct buffer_head         *bh;
3972         struct lu_fid              *fid = (struct lu_fid *) rec;
3973         struct htree_lock          *hlock = NULL;
3974         int                         ino;
3975         int                         rc;
3976         ENTRY;
3977
3978         LASSERT(dir->i_op != NULL && dir->i_op->lookup != NULL);
3979
3980         dentry = osd_child_dentry_get(env, obj,
3981                                       (char *)key, strlen((char *)key));
3982
3983         if (obj->oo_hl_head != NULL) {
3984                 hlock = osd_oti_get(env)->oti_hlock;
3985                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
3986                                    dir, LDISKFS_HLOCK_LOOKUP);
3987         } else {
3988                 down_read(&obj->oo_ext_idx_sem);
3989         }
3990
3991         bh = osd_ldiskfs_find_entry(dir, dentry, &de, hlock);
3992         if (bh) {
3993                 struct osd_thread_info *oti = osd_oti_get(env);
3994                 struct osd_inode_id *id = &oti->oti_id;
3995                 struct osd_idmap_cache *oic = &oti->oti_cache;
3996                 struct osd_device *dev = osd_obj2dev(obj);
3997                 struct osd_scrub *scrub = &dev->od_scrub;
3998                 struct scrub_file *sf = &scrub->os_file;
3999
4000                 ino = le32_to_cpu(de->inode);
4001                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP)) {
4002                         brelse(bh);
4003                         rc = osd_fail_fid_lookup(oti, dev, oic, fid, ino);
4004                         GOTO(out, rc);
4005                 }
4006
4007                 rc = osd_get_fid_from_dentry(de, rec);
4008
4009                 /* done with de, release bh */
4010                 brelse(bh);
4011                 if (rc != 0)
4012                         rc = osd_ea_fid_get(env, obj, ino, fid, id);
4013                 else
4014                         osd_id_gen(id, ino, OSD_OII_NOGEN);
4015                 if (rc != 0) {
4016                         fid_zero(&oic->oic_fid);
4017                         GOTO(out, rc);
4018                 }
4019
4020                 rc = osd_add_oi_cache(osd_oti_get(env), osd_obj2dev(obj), id,
4021                                       fid);
4022                 if (rc != 0)
4023                         GOTO(out, rc);
4024                 if ((scrub->os_pos_current <= ino) &&
4025                     ((sf->sf_flags & SF_INCONSISTENT) ||
4026                      (sf->sf_flags & SF_UPGRADE && fid_is_igif(fid)) ||
4027                      ldiskfs_test_bit(osd_oi_fid2idx(dev, fid),
4028                                       sf->sf_oi_bitmap)))
4029                         osd_consistency_check(oti, dev, oic);
4030         } else {
4031                 rc = -ENOENT;
4032         }
4033
4034         GOTO(out, rc);
4035
4036 out:
4037         if (hlock != NULL)
4038                 ldiskfs_htree_unlock(hlock);
4039         else
4040                 up_read(&obj->oo_ext_idx_sem);
4041         return rc;
4042 }
4043
4044 /**
4045  * Find the osd object for given fid.
4046  *
4047  * \param fid need to find the osd object having this fid
4048  *
4049  * \retval osd_object on success
4050  * \retval        -ve on error
4051  */
4052 struct osd_object *osd_object_find(const struct lu_env *env,
4053                                    struct dt_object *dt,
4054                                    const struct lu_fid *fid)
4055 {
4056         struct lu_device  *ludev = dt->do_lu.lo_dev;
4057         struct osd_object *child = NULL;
4058         struct lu_object  *luch;
4059         struct lu_object  *lo;
4060
4061         /*
4062          * at this point topdev might not exist yet
4063          * (i.e. MGS is preparing profiles). so we can
4064          * not rely on topdev and instead lookup with
4065          * our device passed as topdev. this can't work
4066          * if the object isn't cached yet (as osd doesn't
4067          * allocate lu_header). IOW, the object must be
4068          * in the cache, otherwise lu_object_alloc() crashes
4069          * -bzzz
4070          */
4071         luch = lu_object_find_at(env, ludev, fid, NULL);
4072         if (!IS_ERR(luch)) {
4073                 if (lu_object_exists(luch)) {
4074                         lo = lu_object_locate(luch->lo_header, ludev->ld_type);
4075                         if (lo != NULL)
4076                                 child = osd_obj(lo);
4077                         else
4078                                 LU_OBJECT_DEBUG(D_ERROR, env, luch,
4079                                                 "lu_object can't be located"
4080                                                 DFID"\n", PFID(fid));
4081
4082                         if (child == NULL) {
4083                                 lu_object_put(env, luch);
4084                                 CERROR("Unable to get osd_object\n");
4085                                 child = ERR_PTR(-ENOENT);
4086                         }
4087                 } else {
4088                         LU_OBJECT_DEBUG(D_ERROR, env, luch,
4089                                         "lu_object does not exists "DFID"\n",
4090                                         PFID(fid));
4091                         lu_object_put(env, luch);
4092                         child = ERR_PTR(-ENOENT);
4093                 }
4094         } else {
4095                 child = ERR_CAST(luch);
4096         }
4097
4098         return child;
4099 }
4100
4101 /**
4102  * Put the osd object once done with it.
4103  *
4104  * \param obj osd object that needs to be put
4105  */
4106 static inline void osd_object_put(const struct lu_env *env,
4107                                   struct osd_object *obj)
4108 {
4109         lu_object_put(env, &obj->oo_dt.do_lu);
4110 }
4111
4112 static int osd_index_declare_ea_insert(const struct lu_env *env,
4113                                        struct dt_object *dt,
4114                                        const struct dt_rec *rec,
4115                                        const struct dt_key *key,
4116                                        struct thandle *handle)
4117 {
4118         struct osd_thandle      *oh;
4119         struct osd_device       *osd   = osd_dev(dt->do_lu.lo_dev);
4120         struct lu_fid           *fid = (struct lu_fid *)rec;
4121         int                     rc;
4122         ENTRY;
4123
4124         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
4125         LASSERT(handle != NULL);
4126
4127         oh = container_of0(handle, struct osd_thandle, ot_super);
4128         LASSERT(oh->ot_handle == NULL);
4129
4130         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
4131                              osd_dto_credits_noquota[DTO_INDEX_INSERT]);
4132
4133         if (osd_dt_obj(dt)->oo_inode == NULL) {
4134                 const char *name  = (const char *)key;
4135                 /* Object is not being created yet. Only happens when
4136                  *     1. declare directory create
4137                  *     2. declare insert .
4138                  *     3. declare insert ..
4139                  */
4140                 LASSERT(strcmp(name, dotdot) == 0 || strcmp(name, dot) == 0);
4141         } else {
4142                 struct inode *inode = osd_dt_obj(dt)->oo_inode;
4143
4144                 /* We ignore block quota on meta pool (MDTs), so needn't
4145                  * calculate how many blocks will be consumed by this index
4146                  * insert */
4147                 rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, 0,
4148                                            oh, true, true, NULL, false);
4149         }
4150
4151         if (fid == NULL)
4152                 RETURN(0);
4153
4154         rc = osd_remote_fid(env, osd, fid);
4155         if (rc <= 0)
4156                 RETURN(rc);
4157
4158         rc = 0;
4159
4160         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
4161                              osd_dto_credits_noquota[DTO_OBJECT_CREATE]);
4162         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
4163                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
4164         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
4165                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
4166
4167         RETURN(rc);
4168 }
4169
4170 /**
4171  * Index add function for interoperability mode (b11826).
4172  * It will add the directory entry.This entry is needed to
4173  * maintain name->fid mapping.
4174  *
4175  * \param key it is key i.e. file entry to be inserted
4176  * \param rec it is value of given key i.e. fid
4177  *
4178  * \retval   0, on success
4179  * \retval -ve, on error
4180  */
4181 static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
4182                                const struct dt_rec *rec,
4183                                const struct dt_key *key, struct thandle *th,
4184                                struct lustre_capa *capa, int ignore_quota)
4185 {
4186         struct osd_object       *obj = osd_dt_obj(dt);
4187         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
4188         struct lu_fid           *fid = (struct lu_fid *) rec;
4189         const char              *name = (const char *)key;
4190         struct osd_thread_info  *oti   = osd_oti_get(env);
4191         struct osd_inode_id     *id    = &oti->oti_id;
4192         struct inode            *child_inode = NULL;
4193         struct osd_object       *child = NULL;
4194         int                     rc;
4195         ENTRY;
4196
4197         LASSERT(osd_invariant(obj));
4198         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
4199         LASSERT(th != NULL);
4200
4201         osd_trans_exec_op(env, th, OSD_OT_INSERT);
4202
4203         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
4204                 RETURN(-EACCES);
4205
4206         LASSERTF(fid_is_sane(fid), "fid"DFID" is insane!", PFID(fid));
4207
4208         rc = osd_remote_fid(env, osd, fid);
4209         if (rc < 0) {
4210                 CERROR("%s: Can not find object "DFID" rc %d\n",
4211                        osd_name(osd), PFID(fid), rc);
4212                 RETURN(rc);
4213         }
4214
4215         if (rc == 1) {
4216                 /* Insert remote entry */
4217                 if (strcmp(name, dotdot) == 0 && strlen(name) == 2) {
4218                         struct osd_mdobj_map    *omm = osd->od_mdt_map;
4219                         struct osd_thandle      *oh;
4220
4221                         /* If parent on remote MDT, we need put this object
4222                          * under AGENT */
4223                         oh = container_of(th, typeof(*oh), ot_super);
4224                         rc = osd_add_to_remote_parent(env, osd, obj, oh);
4225                         if (rc != 0) {
4226                                 CERROR("%s: add "DFID" error: rc = %d\n",
4227                                        osd_name(osd),
4228                                        PFID(lu_object_fid(&dt->do_lu)), rc);
4229                                 RETURN(rc);
4230                         }
4231
4232                         child_inode = igrab(omm->omm_remote_parent->d_inode);
4233                 } else {
4234                         child_inode = osd_create_local_agent_inode(env, osd,
4235                                                                    obj, fid,
4236                                                                    th);
4237                         if (IS_ERR(child_inode))
4238                                 RETURN(PTR_ERR(child_inode));
4239                 }
4240         } else {
4241                 /* Insert local entry */
4242                 child = osd_object_find(env, dt, fid);
4243                 if (IS_ERR(child)) {
4244                         CERROR("%s: Can not find object "DFID"%u:%u: rc = %d\n",
4245                                osd_name(osd), PFID(fid),
4246                                id->oii_ino, id->oii_gen,
4247                                (int)PTR_ERR(child));
4248                         RETURN(PTR_ERR(child));
4249                 }
4250                 child_inode = igrab(child->oo_inode);
4251         }
4252
4253         rc = osd_ea_add_rec(env, obj, child_inode, name, rec, th);
4254
4255         iput(child_inode);
4256         if (child != NULL)
4257                 osd_object_put(env, child);
4258         LASSERT(osd_invariant(obj));
4259         RETURN(rc);
4260 }
4261
4262 /**
4263  *  Initialize osd Iterator for given osd index object.
4264  *
4265  *  \param  dt      osd index object
4266  */
4267
4268 static struct dt_it *osd_it_iam_init(const struct lu_env *env,
4269                                      struct dt_object *dt,
4270                                      __u32 unused,
4271                                      struct lustre_capa *capa)
4272 {
4273         struct osd_it_iam      *it;
4274         struct osd_thread_info *oti = osd_oti_get(env);
4275         struct osd_object      *obj = osd_dt_obj(dt);
4276         struct lu_object       *lo  = &dt->do_lu;
4277         struct iam_path_descr  *ipd;
4278         struct iam_container   *bag = &obj->oo_dir->od_container;
4279
4280         LASSERT(lu_object_exists(lo));
4281
4282         if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_READ))
4283                 return ERR_PTR(-EACCES);
4284
4285         it = &oti->oti_it;
4286         ipd = osd_it_ipd_get(env, bag);
4287         if (likely(ipd != NULL)) {
4288                 it->oi_obj = obj;
4289                 it->oi_ipd = ipd;
4290                 lu_object_get(lo);
4291                 iam_it_init(&it->oi_it, bag, IAM_IT_MOVE, ipd);
4292                 return (struct dt_it *)it;
4293         }
4294         return ERR_PTR(-ENOMEM);
4295 }
4296
4297 /**
4298  * free given Iterator.
4299  */
4300
4301 static void osd_it_iam_fini(const struct lu_env *env, struct dt_it *di)
4302 {
4303         struct osd_it_iam *it = (struct osd_it_iam *)di;
4304         struct osd_object *obj = it->oi_obj;
4305
4306         iam_it_fini(&it->oi_it);
4307         osd_ipd_put(env, &obj->oo_dir->od_container, it->oi_ipd);
4308         lu_object_put(env, &obj->oo_dt.do_lu);
4309 }
4310
4311 /**
4312  *  Move Iterator to record specified by \a key
4313  *
4314  *  \param  di      osd iterator
4315  *  \param  key     key for index
4316  *
4317  *  \retval +ve  di points to record with least key not larger than key
4318  *  \retval  0   di points to exact matched key
4319  *  \retval -ve  failure
4320  */
4321
4322 static int osd_it_iam_get(const struct lu_env *env,
4323                           struct dt_it *di, const struct dt_key *key)
4324 {
4325         struct osd_thread_info  *oti = osd_oti_get(env);
4326         struct osd_it_iam       *it = (struct osd_it_iam *)di;
4327
4328         if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
4329                 /* swab quota uid/gid */
4330                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
4331                 key = (struct dt_key *)&oti->oti_quota_id;
4332         }
4333
4334         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
4335 }
4336
4337 /**
4338  *  Release Iterator
4339  *
4340  *  \param  di      osd iterator
4341  */
4342 static void osd_it_iam_put(const struct lu_env *env, struct dt_it *di)
4343 {
4344         struct osd_it_iam *it = (struct osd_it_iam *)di;
4345
4346         iam_it_put(&it->oi_it);
4347 }
4348
4349 /**
4350  *  Move iterator by one record
4351  *
4352  *  \param  di      osd iterator
4353  *
4354  *  \retval +1   end of container reached
4355  *  \retval  0   success
4356  *  \retval -ve  failure
4357  */
4358
4359 static int osd_it_iam_next(const struct lu_env *env, struct dt_it *di)
4360 {
4361         struct osd_it_iam *it = (struct osd_it_iam *)di;
4362
4363         return iam_it_next(&it->oi_it);
4364 }
4365
4366 /**
4367  * Return pointer to the key under iterator.
4368  */
4369
4370 static struct dt_key *osd_it_iam_key(const struct lu_env *env,
4371                                  const struct dt_it *di)
4372 {
4373         struct osd_thread_info *oti = osd_oti_get(env);
4374         struct osd_it_iam      *it = (struct osd_it_iam *)di;
4375         struct osd_object      *obj = it->oi_obj;
4376         struct dt_key          *key;
4377
4378         key = (struct dt_key *)iam_it_key_get(&it->oi_it);
4379
4380         if (!IS_ERR(key) && fid_is_quota(lu_object_fid(&obj->oo_dt.do_lu))) {
4381                 /* swab quota uid/gid */
4382                 oti->oti_quota_id = le64_to_cpu(*((__u64 *)key));
4383                 key = (struct dt_key *)&oti->oti_quota_id;
4384         }
4385
4386         return key;
4387 }
4388
4389 /**
4390  * Return size of key under iterator (in bytes)
4391  */
4392
4393 static int osd_it_iam_key_size(const struct lu_env *env, const struct dt_it *di)
4394 {
4395         struct osd_it_iam *it = (struct osd_it_iam *)di;
4396
4397         return iam_it_key_size(&it->oi_it);
4398 }
4399
4400 static inline void
4401 osd_it_append_attrs(struct lu_dirent *ent, int len, __u16 type)
4402 {
4403         /* check if file type is required */
4404         if (ent->lde_attrs & LUDA_TYPE) {
4405                 struct luda_type *lt;
4406                 int align = sizeof(*lt) - 1;
4407
4408                 len = (len + align) & ~align;
4409                 lt = (struct luda_type *)(ent->lde_name + len);
4410                 lt->lt_type = cpu_to_le16(DTTOIF(type));
4411         }
4412
4413         ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
4414 }
4415
4416 /**
4417  * build lu direct from backend fs dirent.
4418  */
4419
4420 static inline void
4421 osd_it_pack_dirent(struct lu_dirent *ent, struct lu_fid *fid, __u64 offset,
4422                    char *name, __u16 namelen, __u16 type, __u32 attr)
4423 {
4424         ent->lde_attrs = attr | LUDA_FID;
4425         fid_cpu_to_le(&ent->lde_fid, fid);
4426
4427         ent->lde_hash = cpu_to_le64(offset);
4428         ent->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
4429
4430         strncpy(ent->lde_name, name, namelen);
4431         ent->lde_name[namelen] = '\0';
4432         ent->lde_namelen = cpu_to_le16(namelen);
4433
4434         /* append lustre attributes */
4435         osd_it_append_attrs(ent, namelen, type);
4436 }
4437
4438 /**
4439  * Return pointer to the record under iterator.
4440  */
4441 static int osd_it_iam_rec(const struct lu_env *env,
4442                           const struct dt_it *di,
4443                           struct dt_rec *dtrec, __u32 attr)
4444 {
4445         struct osd_it_iam      *it   = (struct osd_it_iam *)di;
4446         struct osd_thread_info *info = osd_oti_get(env);
4447         ENTRY;
4448
4449         if (S_ISDIR(it->oi_obj->oo_inode->i_mode)) {
4450                 const struct osd_fid_pack *rec;
4451                 struct lu_fid             *fid = &info->oti_fid;
4452                 struct lu_dirent          *lde = (struct lu_dirent *)dtrec;
4453                 char                      *name;
4454                 int                        namelen;
4455                 __u64                      hash;
4456                 int                        rc;
4457
4458                 name = (char *)iam_it_key_get(&it->oi_it);
4459                 if (IS_ERR(name))
4460                         RETURN(PTR_ERR(name));
4461
4462                 namelen = iam_it_key_size(&it->oi_it);
4463
4464                 rec = (const struct osd_fid_pack *)iam_it_rec_get(&it->oi_it);
4465                 if (IS_ERR(rec))
4466                         RETURN(PTR_ERR(rec));
4467
4468                 rc = osd_fid_unpack(fid, rec);
4469                 if (rc)
4470                         RETURN(rc);
4471
4472                 hash = iam_it_store(&it->oi_it);
4473
4474                 /* IAM does not store object type in IAM index (dir) */
4475                 osd_it_pack_dirent(lde, fid, hash, name, namelen,
4476                                    0, LUDA_FID);
4477         } else if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
4478                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
4479                            (struct iam_rec *)dtrec);
4480                 osd_quota_unpack(it->oi_obj, dtrec);
4481         } else {
4482                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
4483                            (struct iam_rec *)dtrec);
4484         }
4485
4486         RETURN(0);
4487 }
4488
4489 /**
4490  * Returns cookie for current Iterator position.
4491  */
4492 static __u64 osd_it_iam_store(const struct lu_env *env, const struct dt_it *di)
4493 {
4494         struct osd_it_iam *it = (struct osd_it_iam *)di;
4495
4496         return iam_it_store(&it->oi_it);
4497 }
4498
4499 /**
4500  * Restore iterator from cookie.
4501  *
4502  * \param  di      osd iterator
4503  * \param  hash    Iterator location cookie
4504  *
4505  * \retval +ve  di points to record with least key not larger than key.
4506  * \retval  0   di points to exact matched key
4507  * \retval -ve  failure
4508  */
4509
4510 static int osd_it_iam_load(const struct lu_env *env,
4511                            const struct dt_it *di, __u64 hash)
4512 {
4513         struct osd_it_iam *it = (struct osd_it_iam *)di;
4514
4515         return iam_it_load(&it->oi_it, hash);
4516 }
4517
4518 static const struct dt_index_operations osd_index_iam_ops = {
4519         .dio_lookup         = osd_index_iam_lookup,
4520         .dio_declare_insert = osd_index_declare_iam_insert,
4521         .dio_insert         = osd_index_iam_insert,
4522         .dio_declare_delete = osd_index_declare_iam_delete,
4523         .dio_delete         = osd_index_iam_delete,
4524         .dio_it     = {
4525                 .init     = osd_it_iam_init,
4526                 .fini     = osd_it_iam_fini,
4527                 .get      = osd_it_iam_get,
4528                 .put      = osd_it_iam_put,
4529                 .next     = osd_it_iam_next,
4530                 .key      = osd_it_iam_key,
4531                 .key_size = osd_it_iam_key_size,
4532                 .rec      = osd_it_iam_rec,
4533                 .store    = osd_it_iam_store,
4534                 .load     = osd_it_iam_load
4535         }
4536 };
4537
4538
4539 /**
4540  * Creates or initializes iterator context.
4541  *
4542  * \retval struct osd_it_ea, iterator structure on success
4543  *
4544  */
4545 static struct dt_it *osd_it_ea_init(const struct lu_env *env,
4546                                     struct dt_object *dt,
4547                                     __u32 attr,
4548                                     struct lustre_capa *capa)
4549 {
4550         struct osd_object       *obj  = osd_dt_obj(dt);
4551         struct osd_thread_info  *info = osd_oti_get(env);
4552         struct osd_it_ea        *it   = &info->oti_it_ea;
4553         struct file             *file = &it->oie_file;
4554         struct lu_object        *lo   = &dt->do_lu;
4555         struct dentry           *obj_dentry = &info->oti_it_dentry;
4556         ENTRY;
4557         LASSERT(lu_object_exists(lo));
4558
4559         obj_dentry->d_inode = obj->oo_inode;
4560         obj_dentry->d_sb = osd_sb(osd_obj2dev(obj));
4561         obj_dentry->d_name.hash = 0;
4562
4563         it->oie_rd_dirent       = 0;
4564         it->oie_it_dirent       = 0;
4565         it->oie_dirent          = NULL;
4566         it->oie_buf             = info->oti_it_ea_buf;
4567         it->oie_obj             = obj;
4568
4569         /* Reset the "file" totally to avoid to reuse any old value from
4570          * former readdir handling, the "file->f_pos" should be zero. */
4571         memset(file, 0, sizeof(*file));
4572         /* Only FMODE_64BITHASH or FMODE_32BITHASH should be set, NOT both. */
4573         if (attr & LUDA_64BITHASH)
4574                 file->f_mode    = FMODE_64BITHASH;
4575         else
4576                 file->f_mode    = FMODE_32BITHASH;
4577         file->f_dentry          = obj_dentry;
4578         file->f_mapping         = obj->oo_inode->i_mapping;
4579         file->f_op              = obj->oo_inode->i_fop;
4580         set_file_inode(file, obj->oo_inode);
4581
4582         lu_object_get(lo);
4583         RETURN((struct dt_it *) it);
4584 }
4585
4586 /**
4587  * Destroy or finishes iterator context.
4588  *
4589  * \param di iterator structure to be destroyed
4590  */
4591 static void osd_it_ea_fini(const struct lu_env *env, struct dt_it *di)
4592 {
4593         struct osd_it_ea     *it   = (struct osd_it_ea *)di;
4594         struct osd_object    *obj  = it->oie_obj;
4595         struct inode       *inode  = obj->oo_inode;
4596
4597         ENTRY;
4598         it->oie_file.f_op->release(inode, &it->oie_file);
4599         lu_object_put(env, &obj->oo_dt.do_lu);
4600         EXIT;
4601 }
4602
4603 /**
4604  * It position the iterator at given key, so that next lookup continues from
4605  * that key Or it is similar to dio_it->load() but based on a key,
4606  * rather than file position.
4607  *
4608  * As a special convention, osd_it_ea_get(env, di, "") has to rewind iterator
4609  * to the beginning.
4610  *
4611  * TODO: Presently return +1 considering it is only used by mdd_dir_is_empty().
4612  */
4613 static int osd_it_ea_get(const struct lu_env *env,
4614                          struct dt_it *di, const struct dt_key *key)
4615 {
4616         struct osd_it_ea     *it   = (struct osd_it_ea *)di;
4617
4618         ENTRY;
4619         LASSERT(((const char *)key)[0] == '\0');
4620         it->oie_file.f_pos      = 0;
4621         it->oie_rd_dirent       = 0;
4622         it->oie_it_dirent       = 0;
4623         it->oie_dirent          = NULL;
4624
4625         RETURN(+1);
4626 }
4627
4628 /**
4629  * Does nothing
4630  */
4631 static void osd_it_ea_put(const struct lu_env *env, struct dt_it *di)
4632 {
4633 }
4634
4635 /**
4636  * It is called internally by ->readdir(). It fills the
4637  * iterator's in-memory data structure with required
4638  * information i.e. name, namelen, rec_size etc.
4639  *
4640  * \param buf in which information to be filled in.
4641  * \param name name of the file in given dir
4642  *
4643  * \retval 0 on success
4644  * \retval 1 on buffer full
4645  */
4646 static int osd_ldiskfs_filldir(char *buf, const char *name, int namelen,
4647                                loff_t offset, __u64 ino,
4648                                unsigned d_type)
4649 {
4650         struct osd_it_ea        *it   = (struct osd_it_ea *)buf;
4651         struct osd_object       *obj  = it->oie_obj;
4652         struct osd_it_ea_dirent *ent  = it->oie_dirent;
4653         struct lu_fid           *fid  = &ent->oied_fid;
4654         struct osd_fid_pack     *rec;
4655         ENTRY;
4656
4657         /* this should never happen */
4658         if (unlikely(namelen == 0 || namelen > LDISKFS_NAME_LEN)) {
4659                 CERROR("ldiskfs return invalid namelen %d\n", namelen);
4660                 RETURN(-EIO);
4661         }
4662
4663         if ((void *) ent - it->oie_buf + sizeof(*ent) + namelen >
4664             OSD_IT_EA_BUFSIZE)
4665                 RETURN(1);
4666
4667         /* "." is just the object itself. */
4668         if (namelen == 1 && name[0] == '.') {
4669                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
4670         } else if (d_type & LDISKFS_DIRENT_LUFID) {
4671                 rec = (struct osd_fid_pack*) (name + namelen + 1);
4672                 if (osd_fid_unpack(fid, rec) != 0)
4673                         fid_zero(fid);
4674         } else {
4675                 fid_zero(fid);
4676         }
4677         d_type &= ~LDISKFS_DIRENT_LUFID;
4678
4679         /* NOT export local root. */
4680         if (unlikely(osd_sb(osd_obj2dev(obj))->s_root->d_inode->i_ino == ino)) {
4681                 ino = obj->oo_inode->i_ino;
4682                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
4683         }
4684
4685         ent->oied_ino     = ino;
4686         ent->oied_off     = offset;
4687         ent->oied_namelen = namelen;
4688         ent->oied_type    = d_type;
4689
4690         memcpy(ent->oied_name, name, namelen);
4691
4692         it->oie_rd_dirent++;
4693         it->oie_dirent = (void *) ent + cfs_size_round(sizeof(*ent) + namelen);
4694         RETURN(0);
4695 }
4696
4697 /**
4698  * Calls ->readdir() to load a directory entry at a time
4699  * and stored it in iterator's in-memory data structure.
4700  *
4701  * \param di iterator's in memory structure
4702  *
4703  * \retval   0 on success
4704  * \retval -ve on error
4705  */
4706 static int osd_ldiskfs_it_fill(const struct lu_env *env,
4707                                const struct dt_it *di)
4708 {
4709         struct osd_it_ea   *it    = (struct osd_it_ea *)di;
4710         struct osd_object  *obj   = it->oie_obj;
4711         struct inode       *inode = obj->oo_inode;
4712         struct htree_lock  *hlock = NULL;
4713         int                 result = 0;
4714
4715         ENTRY;
4716         it->oie_dirent = it->oie_buf;
4717         it->oie_rd_dirent = 0;
4718
4719         if (obj->oo_hl_head != NULL) {
4720                 hlock = osd_oti_get(env)->oti_hlock;
4721                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
4722                                    inode, LDISKFS_HLOCK_READDIR);
4723         } else {
4724                 down_read(&obj->oo_ext_idx_sem);
4725         }
4726
4727         result = inode->i_fop->readdir(&it->oie_file, it,
4728                                        (filldir_t) osd_ldiskfs_filldir);
4729
4730         if (hlock != NULL)
4731                 ldiskfs_htree_unlock(hlock);
4732         else
4733                 up_read(&obj->oo_ext_idx_sem);
4734
4735         if (it->oie_rd_dirent == 0) {
4736                 result = -EIO;
4737         } else {
4738                 it->oie_dirent = it->oie_buf;
4739                 it->oie_it_dirent = 1;
4740         }
4741
4742         RETURN(result);
4743 }
4744
4745 /**
4746  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
4747  * to load a directory entry at a time and stored it in
4748  * iterator's in-memory data structure.
4749  *
4750  * \param di iterator's in memory structure
4751  *
4752  * \retval +ve iterator reached to end
4753  * \retval   0 iterator not reached to end
4754  * \retval -ve on error
4755  */
4756 static int osd_it_ea_next(const struct lu_env *env, struct dt_it *di)
4757 {
4758         struct osd_it_ea *it = (struct osd_it_ea *)di;
4759         int rc;
4760
4761         ENTRY;
4762
4763         if (it->oie_it_dirent < it->oie_rd_dirent) {
4764                 it->oie_dirent =
4765                         (void *) it->oie_dirent +
4766                         cfs_size_round(sizeof(struct osd_it_ea_dirent) +
4767                                        it->oie_dirent->oied_namelen);
4768                 it->oie_it_dirent++;
4769                 RETURN(0);
4770         } else {
4771                 if (it->oie_file.f_pos == ldiskfs_get_htree_eof(&it->oie_file))
4772                         rc = +1;
4773                 else
4774                         rc = osd_ldiskfs_it_fill(env, di);
4775         }
4776
4777         RETURN(rc);
4778 }
4779
4780 /**
4781  * Returns the key at current position from iterator's in memory structure.
4782  *
4783  * \param di iterator's in memory structure
4784  *
4785  * \retval key i.e. struct dt_key on success
4786  */
4787 static struct dt_key *osd_it_ea_key(const struct lu_env *env,
4788                                     const struct dt_it *di)
4789 {
4790         struct osd_it_ea *it = (struct osd_it_ea *)di;
4791
4792         return (struct dt_key *)it->oie_dirent->oied_name;
4793 }
4794
4795 /**
4796  * Returns the key's size at current position from iterator's in memory structure.
4797  *
4798  * \param di iterator's in memory structure
4799  *
4800  * \retval key_size i.e. struct dt_key on success
4801  */
4802 static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
4803 {
4804         struct osd_it_ea *it = (struct osd_it_ea *)di;
4805
4806         return it->oie_dirent->oied_namelen;
4807 }
4808
4809 static int
4810 osd_dirent_update(handle_t *jh, struct super_block *sb,
4811                   struct osd_it_ea_dirent *ent, struct lu_fid *fid,
4812                   struct buffer_head *bh, struct ldiskfs_dir_entry_2 *de)
4813 {
4814         struct osd_fid_pack *rec;
4815         int                  rc;
4816         ENTRY;
4817
4818         LASSERT(de->file_type & LDISKFS_DIRENT_LUFID);
4819         LASSERT(de->rec_len >= de->name_len + sizeof(struct osd_fid_pack));
4820
4821         rc = ldiskfs_journal_get_write_access(jh, bh);
4822         if (rc != 0) {
4823                 CERROR("%.16s: fail to write access for update dirent: "
4824                        "name = %.*s, rc = %d\n",
4825                        LDISKFS_SB(sb)->s_es->s_volume_name,
4826                        ent->oied_namelen, ent->oied_name, rc);
4827                 RETURN(rc);
4828         }
4829
4830         rec = (struct osd_fid_pack *)(de->name + de->name_len + 1);
4831         fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
4832         rc = ldiskfs_journal_dirty_metadata(jh, bh);
4833         if (rc != 0)
4834                 CERROR("%.16s: fail to dirty metadata for update dirent: "
4835                        "name = %.*s, rc = %d\n",
4836                        LDISKFS_SB(sb)->s_es->s_volume_name,
4837                        ent->oied_namelen, ent->oied_name, rc);
4838
4839         RETURN(rc);
4840 }
4841
4842 static inline int
4843 osd_dirent_has_space(__u16 reclen, __u16 namelen, unsigned blocksize)
4844 {
4845         if (ldiskfs_rec_len_from_disk(reclen, blocksize) >=
4846             __LDISKFS_DIR_REC_LEN(namelen + 1 + sizeof(struct osd_fid_pack)))
4847                 return 1;
4848         else
4849                 return 0;
4850 }
4851
4852 static inline int
4853 osd_dot_dotdot_has_space(struct ldiskfs_dir_entry_2 *de, int dot_dotdot)
4854 {
4855         LASSERTF(dot_dotdot == 1 || dot_dotdot == 2,
4856                  "dot_dotdot = %d\n", dot_dotdot);
4857
4858         if (LDISKFS_DIR_REC_LEN(de) >=
4859             __LDISKFS_DIR_REC_LEN(dot_dotdot + 1 + sizeof(struct osd_fid_pack)))
4860                 return 1;
4861         else
4862                 return 0;
4863 }
4864
4865 static int
4866 osd_dirent_reinsert(const struct lu_env *env, handle_t *jh,
4867                     struct inode *dir, struct inode *inode,
4868                     struct osd_it_ea_dirent *ent, struct lu_fid *fid,
4869                     struct buffer_head *bh, struct ldiskfs_dir_entry_2 *de,
4870                     struct htree_lock *hlock)
4871 {
4872         struct dentry               *dentry;
4873         struct osd_fid_pack         *rec;
4874         struct ldiskfs_dentry_param *ldp;
4875         int                          rc;
4876         ENTRY;
4877
4878         if (!LDISKFS_HAS_INCOMPAT_FEATURE(inode->i_sb,
4879                                           LDISKFS_FEATURE_INCOMPAT_DIRDATA))
4880                 RETURN(0);
4881
4882         /* There is enough space to hold the FID-in-dirent. */
4883         if (osd_dirent_has_space(de->rec_len, ent->oied_namelen,
4884                                  dir->i_sb->s_blocksize)) {
4885                 rc = ldiskfs_journal_get_write_access(jh, bh);
4886                 if (rc != 0) {
4887                         CERROR("%.16s: fail to write access for reinsert "
4888                                "dirent: name = %.*s, rc = %d\n",
4889                                LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
4890                                ent->oied_namelen, ent->oied_name, rc);
4891                         RETURN(rc);
4892                 }
4893
4894                 de->name[de->name_len] = 0;
4895                 rec = (struct osd_fid_pack *)(de->name + de->name_len + 1);
4896                 rec->fp_len = sizeof(struct lu_fid) + 1;
4897                 fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
4898                 de->file_type |= LDISKFS_DIRENT_LUFID;
4899
4900                 rc = ldiskfs_journal_dirty_metadata(jh, bh);
4901                 if (rc != 0)
4902                         CERROR("%.16s: fail to dirty metadata for reinsert "
4903                                "dirent: name = %.*s, rc = %d\n",
4904                                LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
4905                                ent->oied_namelen, ent->oied_name, rc);
4906
4907                 RETURN(rc);
4908         }
4909
4910         rc = ldiskfs_delete_entry(jh, dir, de, bh);
4911         if (rc != 0) {
4912                 CERROR("%.16s: fail to delete entry for reinsert dirent: "
4913                        "name = %.*s, rc = %d\n",
4914                        LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
4915                        ent->oied_namelen, ent->oied_name, rc);
4916                 RETURN(rc);
4917         }
4918
4919         dentry = osd_child_dentry_by_inode(env, dir, ent->oied_name,
4920                                            ent->oied_namelen);
4921         ldp = (struct ldiskfs_dentry_param *)osd_oti_get(env)->oti_ldp;
4922         osd_get_ldiskfs_dirent_param(ldp, (const struct dt_rec *)fid);
4923         dentry->d_fsdata = (void *)ldp;
4924         ll_vfs_dq_init(dir);
4925         rc = osd_ldiskfs_add_entry(jh, dentry, inode, hlock);
4926         /* It is too bad, we cannot reinsert the name entry back.
4927          * That means we lose it! */
4928         if (rc != 0)
4929                 CERROR("%.16s: fail to insert entry for reinsert dirent: "
4930                        "name = %.*s, rc = %d\n",
4931                        LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
4932                        ent->oied_namelen, ent->oied_name, rc);
4933
4934         RETURN(rc);
4935 }
4936
4937 static int
4938 osd_dirent_check_repair(const struct lu_env *env, struct osd_object *obj,
4939                         struct osd_it_ea *it, struct lu_fid *fid,
4940                         struct osd_inode_id *id, __u32 *attr)
4941 {
4942         struct osd_thread_info     *info        = osd_oti_get(env);
4943         struct lustre_mdt_attrs    *lma         = &info->oti_mdt_attrs;
4944         struct osd_device          *dev         = osd_obj2dev(obj);
4945         struct super_block         *sb          = osd_sb(dev);
4946         const char                 *devname     =
4947                                         LDISKFS_SB(sb)->s_es->s_volume_name;
4948         struct osd_it_ea_dirent    *ent         = it->oie_dirent;
4949         struct inode               *dir         = obj->oo_inode;
4950         struct htree_lock          *hlock       = NULL;
4951         struct buffer_head         *bh          = NULL;
4952         handle_t                   *jh          = NULL;
4953         struct ldiskfs_dir_entry_2 *de;
4954         struct dentry              *dentry;
4955         struct inode               *inode;
4956         int                         credits;
4957         int                         rc;
4958         int                         dot_dotdot  = 0;
4959         bool                        dirty       = false;
4960         ENTRY;
4961
4962         if (ent->oied_name[0] == '.') {
4963                 if (ent->oied_namelen == 1)
4964                         dot_dotdot = 1;
4965                 else if (ent->oied_namelen == 2 && ent->oied_name[1] == '.')
4966                         dot_dotdot = 2;
4967         }
4968
4969         dentry = osd_child_dentry_get(env, obj, ent->oied_name,
4970                                       ent->oied_namelen);
4971
4972         /* We need to ensure that the name entry is still valid.
4973          * Because it may be removed or renamed by other already.
4974          *
4975          * The unlink or rename operation will start journal before PDO lock,
4976          * so to avoid deadlock, here we need to start journal handle before
4977          * related PDO lock also. But because we do not know whether there
4978          * will be something to be repaired before PDO lock, we just start
4979          * journal without conditions.
4980          *
4981          * We may need to remove the name entry firstly, then insert back.
4982          * One credit is for user quota file update.
4983          * One credit is for group quota file update.
4984          * Two credits are for dirty inode. */
4985         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE] +
4986                   osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1 + 1 + 2;
4987
4988 again:
4989         if (dev->od_dirent_journal) {
4990                 jh = ldiskfs_journal_start_sb(sb, credits);
4991                 if (IS_ERR(jh)) {
4992                         rc = PTR_ERR(jh);
4993                         CERROR("%.16s: fail to start trans for dirent "
4994                                "check_repair: credits %d, name %.*s, rc %d\n",
4995                                devname, credits, ent->oied_namelen,
4996                                ent->oied_name, rc);
4997                         RETURN(rc);
4998                 }
4999
5000                 if (obj->oo_hl_head != NULL) {
5001                         hlock = osd_oti_get(env)->oti_hlock;
5002                         /* "0" means exclusive lock for the whole directory.
5003                          * We need to prevent others access such name entry
5004                          * during the delete + insert. Neither HLOCK_ADD nor
5005                          * HLOCK_DEL cannot guarantee the atomicity. */
5006                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir, 0);
5007                 } else {
5008                         down_write(&obj->oo_ext_idx_sem);
5009                 }
5010         } else {
5011                 if (obj->oo_hl_head != NULL) {
5012                         hlock = osd_oti_get(env)->oti_hlock;
5013                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir,
5014                                            LDISKFS_HLOCK_LOOKUP);
5015                 } else {
5016                         down_read(&obj->oo_ext_idx_sem);
5017                 }
5018         }
5019
5020         bh = osd_ldiskfs_find_entry(dir, dentry, &de, hlock);
5021         /* For dot/dotdot entry, if there is not enough space to hold the
5022          * FID-in-dirent, just keep them there. It only happens when the
5023          * device upgraded from 1.8 or restored from MDT file-level backup.
5024          * For the whole directory, only dot/dotdot entry have no FID-in-dirent
5025          * and needs to get FID from LMA when readdir, it will not affect the
5026          * performance much. */
5027         if ((bh == NULL) || (le32_to_cpu(de->inode) != ent->oied_ino) ||
5028             (dot_dotdot != 0 && !osd_dot_dotdot_has_space(de, dot_dotdot))) {
5029                 *attr |= LUDA_IGNORE;
5030                 GOTO(out_journal, rc = 0);
5031         }
5032
5033         osd_id_gen(id, ent->oied_ino, OSD_OII_NOGEN);
5034         inode = osd_iget(info, dev, id);
5035         if (IS_ERR(inode)) {
5036                 rc = PTR_ERR(inode);
5037                 if (rc == -ENOENT || rc == -ESTALE) {
5038                         *attr |= LUDA_IGNORE;
5039                         rc = 0;
5040                 }
5041
5042                 GOTO(out_journal, rc);
5043         }
5044
5045         /* skip the REMOTE_PARENT_DIR. */
5046         if (inode == dev->od_mdt_map->omm_remote_parent->d_inode)
5047                 GOTO(out_inode, rc = 0);
5048
5049         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
5050         if (rc == 0) {
5051                 LASSERT(!(lma->lma_compat & LMAC_NOT_IN_OI));
5052
5053                 if (fid_is_sane(fid)) {
5054                         /* FID-in-dirent is valid. */
5055                         if (lu_fid_eq(fid, &lma->lma_self_fid))
5056                                 GOTO(out_inode, rc = 0);
5057
5058                         /* Do not repair under dryrun mode. */
5059                         if (*attr & LUDA_VERIFY_DRYRUN) {
5060                                 *attr |= LUDA_REPAIR;
5061                                 GOTO(out_inode, rc = 0);
5062                         }
5063
5064                         if (!dev->od_dirent_journal) {
5065                                 iput(inode);
5066                                 brelse(bh);
5067                                 if (hlock != NULL)
5068                                         ldiskfs_htree_unlock(hlock);
5069                                 else
5070                                         up_read(&obj->oo_ext_idx_sem);
5071                                 dev->od_dirent_journal = 1;
5072                                 goto again;
5073                         }
5074
5075                         *fid = lma->lma_self_fid;
5076                         dirty = true;
5077                         /* Update the FID-in-dirent. */
5078                         rc = osd_dirent_update(jh, sb, ent, fid, bh, de);
5079                         if (rc == 0)
5080                                 *attr |= LUDA_REPAIR;
5081                 } else {
5082                         /* Do not repair under dryrun mode. */
5083                         if (*attr & LUDA_VERIFY_DRYRUN) {
5084                                 *fid = lma->lma_self_fid;
5085                                 *attr |= LUDA_REPAIR;
5086                                 GOTO(out_inode, rc = 0);
5087                         }
5088
5089                         if (!dev->od_dirent_journal) {
5090                                 iput(inode);
5091                                 brelse(bh);
5092                                 if (hlock != NULL)
5093                                         ldiskfs_htree_unlock(hlock);
5094                                 else
5095                                         up_read(&obj->oo_ext_idx_sem);
5096                                 dev->od_dirent_journal = 1;
5097                                 goto again;
5098                         }
5099
5100                         *fid = lma->lma_self_fid;
5101                         dirty = true;
5102                         /* Append the FID-in-dirent. */
5103                         rc = osd_dirent_reinsert(env, jh, dir, inode, ent,
5104                                                  fid, bh, de, hlock);
5105                         if (rc == 0)
5106                                 *attr |= LUDA_REPAIR;
5107                 }
5108         } else if (rc == -ENODATA) {
5109                 /* Do not repair under dryrun mode. */
5110                 if (*attr & LUDA_VERIFY_DRYRUN) {
5111                         if (fid_is_sane(fid)) {
5112                                 *attr |= LUDA_REPAIR;
5113                         } else {
5114                                 lu_igif_build(fid, inode->i_ino,
5115                                               inode->i_generation);
5116                                 *attr |= LUDA_UPGRADE;
5117                         }
5118                         GOTO(out_inode, rc = 0);
5119                 }
5120
5121                 if (!dev->od_dirent_journal) {
5122                         iput(inode);
5123                         brelse(bh);
5124                         if (hlock != NULL)
5125                                 ldiskfs_htree_unlock(hlock);
5126                         else
5127                                 up_read(&obj->oo_ext_idx_sem);
5128                         dev->od_dirent_journal = 1;
5129                         goto again;
5130                 }
5131
5132                 dirty = true;
5133                 if (unlikely(fid_is_sane(fid))) {
5134                         /* FID-in-dirent exists, but FID-in-LMA is lost.
5135                          * Trust the FID-in-dirent, and add FID-in-LMA. */
5136                         rc = osd_ea_fid_set(info, inode, fid, 0, 0);
5137                         if (rc == 0)
5138                                 *attr |= LUDA_REPAIR;
5139                 } else {
5140                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
5141                         /* It is probably IGIF object. Only aappend the
5142                          * FID-in-dirent. OI scrub will process FID-in-LMA. */
5143                         rc = osd_dirent_reinsert(env, jh, dir, inode, ent,
5144                                                  fid, bh, de, hlock);
5145                         if (rc == 0)
5146                                 *attr |= LUDA_UPGRADE;
5147                 }
5148         }
5149
5150         GOTO(out_inode, rc);
5151
5152 out_inode:
5153         iput(inode);
5154
5155 out_journal:
5156         brelse(bh);
5157         if (hlock != NULL) {
5158                 ldiskfs_htree_unlock(hlock);
5159         } else {
5160                 if (dev->od_dirent_journal)
5161                         up_write(&obj->oo_ext_idx_sem);
5162                 else
5163                         up_read(&obj->oo_ext_idx_sem);
5164         }
5165         if (jh != NULL)
5166                 ldiskfs_journal_stop(jh);
5167         if (rc >= 0 && !dirty)
5168                 dev->od_dirent_journal = 0;
5169         return rc;
5170 }
5171
5172 /**
5173  * Returns the value at current position from iterator's in memory structure.
5174  *
5175  * \param di struct osd_it_ea, iterator's in memory structure
5176  * \param attr attr requested for dirent.
5177  * \param lde lustre dirent
5178  *
5179  * \retval   0 no error and \param lde has correct lustre dirent.
5180  * \retval -ve on error
5181  */
5182 static inline int osd_it_ea_rec(const struct lu_env *env,
5183                                 const struct dt_it *di,
5184                                 struct dt_rec *dtrec, __u32 attr)
5185 {
5186         struct osd_it_ea       *it    = (struct osd_it_ea *)di;
5187         struct osd_object      *obj   = it->oie_obj;
5188         struct osd_device      *dev   = osd_obj2dev(obj);
5189         struct osd_scrub       *scrub = &dev->od_scrub;
5190         struct scrub_file      *sf    = &scrub->os_file;
5191         struct osd_thread_info *oti   = osd_oti_get(env);
5192         struct osd_inode_id    *id    = &oti->oti_id;
5193         struct osd_idmap_cache *oic   = &oti->oti_cache;
5194         struct lu_fid          *fid   = &it->oie_dirent->oied_fid;
5195         struct lu_dirent       *lde   = (struct lu_dirent *)dtrec;
5196         __u32                   ino   = it->oie_dirent->oied_ino;
5197         int                     rc    = 0;
5198         ENTRY;
5199
5200         if (attr & LUDA_VERIFY) {
5201                 attr |= LUDA_TYPE;
5202                 if (unlikely(ino == osd_sb(dev)->s_root->d_inode->i_ino)) {
5203                         attr |= LUDA_IGNORE;
5204                         rc = 0;
5205                 } else {
5206                         rc = osd_dirent_check_repair(env, obj, it, fid, id,
5207                                                      &attr);
5208                 }
5209         } else {
5210                 attr &= ~LU_DIRENT_ATTRS_MASK;
5211                 if (!fid_is_sane(fid)) {
5212                         if (OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP))
5213                                 RETURN(-ENOENT);
5214
5215                         rc = osd_ea_fid_get(env, obj, ino, fid, id);
5216                 } else {
5217                         osd_id_gen(id, ino, OSD_OII_NOGEN);
5218                 }
5219         }
5220
5221         /* Pack the entry anyway, at least the offset is right. */
5222         osd_it_pack_dirent(lde, fid, it->oie_dirent->oied_off,
5223                            it->oie_dirent->oied_name,
5224                            it->oie_dirent->oied_namelen,
5225                            it->oie_dirent->oied_type, attr);
5226
5227         if (rc < 0)
5228                 RETURN(rc);
5229
5230         if (osd_remote_fid(env, dev, fid))
5231                 RETURN(0);
5232
5233         if (likely(!(attr & LUDA_IGNORE)))
5234                 rc = osd_add_oi_cache(oti, dev, id, fid);
5235
5236         if (!(attr & LUDA_VERIFY) &&
5237             (scrub->os_pos_current <= ino) &&
5238             ((sf->sf_flags & SF_INCONSISTENT) ||
5239              (sf->sf_flags & SF_UPGRADE && fid_is_igif(fid)) ||
5240              ldiskfs_test_bit(osd_oi_fid2idx(dev, fid), sf->sf_oi_bitmap)))
5241                 osd_consistency_check(oti, dev, oic);
5242
5243         RETURN(rc);
5244 }
5245
5246 /**
5247  * Returns a cookie for current position of the iterator head, so that
5248  * user can use this cookie to load/start the iterator next time.
5249  *
5250  * \param di iterator's in memory structure
5251  *
5252  * \retval cookie for current position, on success
5253  */
5254 static __u64 osd_it_ea_store(const struct lu_env *env, const struct dt_it *di)
5255 {
5256         struct osd_it_ea *it = (struct osd_it_ea *)di;
5257
5258         return it->oie_dirent->oied_off;
5259 }
5260
5261 /**
5262  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
5263  * to load a directory entry at a time and stored it i inn,
5264  * in iterator's in-memory data structure.
5265  *
5266  * \param di struct osd_it_ea, iterator's in memory structure
5267  *
5268  * \retval +ve on success
5269  * \retval -ve on error
5270  */
5271 static int osd_it_ea_load(const struct lu_env *env,
5272                           const struct dt_it *di, __u64 hash)
5273 {
5274         struct osd_it_ea *it = (struct osd_it_ea *)di;
5275         int rc;
5276
5277         ENTRY;
5278         it->oie_file.f_pos = hash;
5279
5280         rc =  osd_ldiskfs_it_fill(env, di);
5281         if (rc == 0)
5282                 rc = +1;
5283
5284         RETURN(rc);
5285 }
5286
5287 /**
5288  * Index lookup function for interoperability mode (b11826).
5289  *
5290  * \param key,  key i.e. file name to be searched
5291  *
5292  * \retval +ve, on success
5293  * \retval -ve, on error
5294  */
5295 static int osd_index_ea_lookup(const struct lu_env *env, struct dt_object *dt,
5296                                struct dt_rec *rec, const struct dt_key *key,
5297                                struct lustre_capa *capa)
5298 {
5299         struct osd_object *obj = osd_dt_obj(dt);
5300         int rc = 0;
5301
5302         ENTRY;
5303
5304         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
5305         LINVRNT(osd_invariant(obj));
5306
5307         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_LOOKUP))
5308                 return -EACCES;
5309
5310         rc = osd_ea_lookup_rec(env, obj, rec, key);
5311         if (rc == 0)
5312                 rc = +1;
5313         RETURN(rc);
5314 }
5315
5316 /**
5317  * Index and Iterator operations for interoperability
5318  * mode (i.e. to run 2.0 mds on 1.8 disk) (b11826)
5319  */
5320 static const struct dt_index_operations osd_index_ea_ops = {
5321         .dio_lookup         = osd_index_ea_lookup,
5322         .dio_declare_insert = osd_index_declare_ea_insert,
5323         .dio_insert         = osd_index_ea_insert,
5324         .dio_declare_delete = osd_index_declare_ea_delete,
5325         .dio_delete         = osd_index_ea_delete,
5326         .dio_it     = {
5327                 .init     = osd_it_ea_init,
5328                 .fini     = osd_it_ea_fini,
5329                 .get      = osd_it_ea_get,
5330                 .put      = osd_it_ea_put,
5331                 .next     = osd_it_ea_next,
5332                 .key      = osd_it_ea_key,
5333                 .key_size = osd_it_ea_key_size,
5334                 .rec      = osd_it_ea_rec,
5335                 .store    = osd_it_ea_store,
5336                 .load     = osd_it_ea_load
5337         }
5338 };
5339
5340 static void *osd_key_init(const struct lu_context *ctx,
5341                           struct lu_context_key *key)
5342 {
5343         struct osd_thread_info *info;
5344
5345         OBD_ALLOC_PTR(info);
5346         if (info == NULL)
5347                 return ERR_PTR(-ENOMEM);
5348
5349         OBD_ALLOC(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
5350         if (info->oti_it_ea_buf == NULL)
5351                 goto out_free_info;
5352
5353         info->oti_env = container_of(ctx, struct lu_env, le_ctx);
5354
5355         info->oti_hlock = ldiskfs_htree_lock_alloc();
5356         if (info->oti_hlock == NULL)
5357                 goto out_free_ea;
5358
5359         return info;
5360
5361  out_free_ea:
5362         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
5363  out_free_info:
5364         OBD_FREE_PTR(info);
5365         return ERR_PTR(-ENOMEM);
5366 }
5367
5368 static void osd_key_fini(const struct lu_context *ctx,
5369                          struct lu_context_key *key, void* data)
5370 {
5371         struct osd_thread_info *info = data;
5372
5373         if (info->oti_hlock != NULL)
5374                 ldiskfs_htree_lock_free(info->oti_hlock);
5375         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
5376         lu_buf_free(&info->oti_iobuf.dr_pg_buf);
5377         lu_buf_free(&info->oti_iobuf.dr_bl_buf);
5378         OBD_FREE_PTR(info);
5379 }
5380
5381 static void osd_key_exit(const struct lu_context *ctx,
5382                          struct lu_context_key *key, void *data)
5383 {
5384         struct osd_thread_info *info = data;
5385
5386         LASSERT(info->oti_r_locks == 0);
5387         LASSERT(info->oti_w_locks == 0);
5388         LASSERT(info->oti_txns    == 0);
5389 }
5390
5391 /* type constructor/destructor: osd_type_init, osd_type_fini */
5392 LU_TYPE_INIT_FINI(osd, &osd_key);
5393
5394 struct lu_context_key osd_key = {
5395         .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL,
5396         .lct_init = osd_key_init,
5397         .lct_fini = osd_key_fini,
5398         .lct_exit = osd_key_exit
5399 };
5400
5401
5402 static int osd_device_init(const struct lu_env *env, struct lu_device *d,
5403                            const char *name, struct lu_device *next)
5404 {
5405         struct osd_device *osd = osd_dev(d);
5406
5407         if (strlcpy(osd->od_svname, name, sizeof(osd->od_svname))
5408             >= sizeof(osd->od_svname))
5409                 return -E2BIG;
5410         return osd_procfs_init(osd, name);
5411 }
5412
5413 static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
5414 {
5415         ENTRY;
5416
5417         /* shutdown quota slave instance associated with the device */
5418         if (o->od_quota_slave != NULL) {
5419                 qsd_fini(env, o->od_quota_slave);
5420                 o->od_quota_slave = NULL;
5421         }
5422
5423         RETURN(0);
5424 }
5425
5426 static void osd_umount(const struct lu_env *env, struct osd_device *o)
5427 {
5428         ENTRY;
5429
5430         if (o->od_mnt != NULL) {
5431                 shrink_dcache_sb(osd_sb(o));
5432                 osd_sync(env, &o->od_dt_dev);
5433
5434                 mntput(o->od_mnt);
5435                 o->od_mnt = NULL;
5436         }
5437
5438         EXIT;
5439 }
5440
5441 static int osd_mount(const struct lu_env *env,
5442                      struct osd_device *o, struct lustre_cfg *cfg)
5443 {
5444         const char              *name  = lustre_cfg_string(cfg, 0);
5445         const char              *dev  = lustre_cfg_string(cfg, 1);
5446         const char              *opts;
5447         unsigned long            page, s_flags, lmd_flags = 0;
5448         struct page             *__page;
5449         struct file_system_type *type;
5450         char                    *options = NULL;
5451         char                    *str;
5452         struct osd_thread_info  *info = osd_oti_get(env);
5453         struct lu_fid           *fid = &info->oti_fid;
5454         struct inode            *inode;
5455         int                      rc = 0;
5456         ENTRY;
5457
5458         if (o->od_mnt != NULL)
5459                 RETURN(0);
5460
5461         if (strlen(dev) >= sizeof(o->od_mntdev))
5462                 RETURN(-E2BIG);
5463         strcpy(o->od_mntdev, dev);
5464
5465         OBD_PAGE_ALLOC(__page, GFP_IOFS);
5466         if (__page == NULL)
5467                 GOTO(out, rc = -ENOMEM);
5468
5469         str = lustre_cfg_string(cfg, 2);
5470         s_flags = simple_strtoul(str, NULL, 0);
5471         str = strstr(str, ":");
5472         if (str)
5473                 lmd_flags = simple_strtoul(str + 1, NULL, 0);
5474         opts = lustre_cfg_string(cfg, 3);
5475         page = (unsigned long)page_address(__page);
5476         options = (char *)page;
5477         *options = '\0';
5478         if (opts == NULL)
5479                 strcat(options, "user_xattr,acl");
5480         else
5481                 strcat(options, opts);
5482
5483         /* Glom up mount options */
5484         if (*options != '\0')
5485                 strcat(options, ",");
5486         strlcat(options, "no_mbcache", PAGE_CACHE_SIZE);
5487
5488         type = get_fs_type("ldiskfs");
5489         if (!type) {
5490                 CERROR("%s: cannot find ldiskfs module\n", name);
5491                 GOTO(out, rc = -ENODEV);
5492         }
5493
5494         o->od_mnt = vfs_kern_mount(type, s_flags, dev, options);
5495         module_put(type->owner);
5496
5497         if (IS_ERR(o->od_mnt)) {
5498                 rc = PTR_ERR(o->od_mnt);
5499                 o->od_mnt = NULL;
5500                 CERROR("%s: can't mount %s: %d\n", name, dev, rc);
5501                 GOTO(out, rc);
5502         }
5503
5504 #ifdef HAVE_DEV_SET_RDONLY
5505         if (dev_check_rdonly(o->od_mnt->mnt_sb->s_bdev)) {
5506                 CERROR("%s: underlying device %s is marked as read-only. "
5507                        "Setup failed\n", name, dev);
5508                 GOTO(out_mnt, rc = -EROFS);
5509         }
5510 #endif
5511
5512         if (!LDISKFS_HAS_COMPAT_FEATURE(o->od_mnt->mnt_sb,
5513             LDISKFS_FEATURE_COMPAT_HAS_JOURNAL)) {
5514                 CERROR("%s: device %s is mounted w/o journal\n", name, dev);
5515                 GOTO(out_mnt, rc = -EINVAL);
5516         }
5517
5518         inode = osd_sb(o)->s_root->d_inode;
5519         ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NO_OI);
5520         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
5521         rc = osd_ea_fid_set(info, inode, fid, LMAC_NOT_IN_OI, 0);
5522         if (rc != 0) {
5523                 CERROR("%s: failed to set lma on %s root inode\n", name, dev);
5524                 GOTO(out_mnt, rc);
5525         }
5526
5527         if (lmd_flags & LMD_FLG_NOSCRUB)
5528                 o->od_noscrub = 1;
5529
5530         GOTO(out, rc = 0);
5531
5532 out_mnt:
5533         mntput(o->od_mnt);
5534         o->od_mnt = NULL;
5535
5536 out:
5537         if (__page)
5538                 OBD_PAGE_FREE(__page);
5539
5540         return rc;
5541 }
5542
5543 static struct lu_device *osd_device_fini(const struct lu_env *env,
5544                                          struct lu_device *d)
5545 {
5546         struct osd_device *o = osd_dev(d);
5547         ENTRY;
5548
5549         osd_procfs_fini(o);
5550         osd_shutdown(env, o);
5551         osd_scrub_cleanup(env, o);
5552         osd_obj_map_fini(o);
5553         osd_umount(env, o);
5554
5555         RETURN(NULL);
5556 }
5557
5558 static int osd_device_init0(const struct lu_env *env,
5559                             struct osd_device *o,
5560                             struct lustre_cfg *cfg)
5561 {
5562         struct lu_device        *l = osd2lu_dev(o);
5563         struct osd_thread_info *info;
5564         int                     rc;
5565         int                     cplen = 0;
5566
5567         /* if the module was re-loaded, env can loose its keys */
5568         rc = lu_env_refill((struct lu_env *) env);
5569         if (rc)
5570                 GOTO(out, rc);
5571         info = osd_oti_get(env);
5572         LASSERT(info);
5573
5574         l->ld_ops = &osd_lu_ops;
5575         o->od_dt_dev.dd_ops = &osd_dt_ops;
5576
5577         spin_lock_init(&o->od_osfs_lock);
5578         mutex_init(&o->od_otable_mutex);
5579         o->od_osfs_age = cfs_time_shift_64(-1000);
5580
5581         o->od_capa_hash = init_capa_hash();
5582         if (o->od_capa_hash == NULL)
5583                 GOTO(out, rc = -ENOMEM);
5584
5585         o->od_read_cache = 1;
5586         o->od_writethrough_cache = 1;
5587         o->od_readcache_max_filesize = OSD_MAX_CACHE_SIZE;
5588
5589         rc = osd_mount(env, o, cfg);
5590         if (rc)
5591                 GOTO(out_capa, rc);
5592
5593         cplen = strlcpy(o->od_svname, lustre_cfg_string(cfg, 4),
5594                         sizeof(o->od_svname));
5595         if (cplen >= sizeof(o->od_svname)) {
5596                 rc = -E2BIG;
5597                 GOTO(out_mnt, rc);
5598         }
5599
5600         if (server_name_is_ost(o->od_svname))
5601                 o->od_is_ost = 1;
5602
5603         rc = osd_obj_map_init(env, o);
5604         if (rc != 0)
5605                 GOTO(out_mnt, rc);
5606
5607         rc = lu_site_init(&o->od_site, l);
5608         if (rc != 0)
5609                 GOTO(out_compat, rc);
5610         o->od_site.ls_bottom_dev = l;
5611
5612         rc = lu_site_init_finish(&o->od_site);
5613         if (rc != 0)
5614                 GOTO(out_site, rc);
5615
5616         /* self-repair LMA by default */
5617         o->od_lma_self_repair = 1;
5618
5619         CFS_INIT_LIST_HEAD(&o->od_ios_list);
5620         /* setup scrub, including OI files initialization */
5621         rc = osd_scrub_setup(env, o);
5622         if (rc < 0)
5623                 GOTO(out_site, rc);
5624
5625         rc = osd_procfs_init(o, o->od_svname);
5626         if (rc != 0) {
5627                 CERROR("%s: can't initialize procfs: rc = %d\n",
5628                        o->od_svname, rc);
5629                 GOTO(out_scrub, rc);
5630         }
5631
5632         LASSERT(l->ld_site->ls_linkage.next && l->ld_site->ls_linkage.prev);
5633
5634         /* initialize quota slave instance */
5635         o->od_quota_slave = qsd_init(env, o->od_svname, &o->od_dt_dev,
5636                                      o->od_proc_entry);
5637         if (IS_ERR(o->od_quota_slave)) {
5638                 rc = PTR_ERR(o->od_quota_slave);
5639                 o->od_quota_slave = NULL;
5640                 GOTO(out_procfs, rc);
5641         }
5642
5643         RETURN(0);
5644
5645 out_procfs:
5646         osd_procfs_fini(o);
5647 out_scrub:
5648         osd_scrub_cleanup(env, o);
5649 out_site:
5650         lu_site_fini(&o->od_site);
5651 out_compat:
5652         osd_obj_map_fini(o);
5653 out_mnt:
5654         osd_umount(env, o);
5655 out_capa:
5656         cleanup_capa_hash(o->od_capa_hash);
5657 out:
5658         return rc;
5659 }
5660
5661 static struct lu_device *osd_device_alloc(const struct lu_env *env,
5662                                           struct lu_device_type *t,
5663                                           struct lustre_cfg *cfg)
5664 {
5665         struct osd_device *o;
5666         int                rc;
5667
5668         OBD_ALLOC_PTR(o);
5669         if (o == NULL)
5670                 return ERR_PTR(-ENOMEM);
5671
5672         rc = dt_device_init(&o->od_dt_dev, t);
5673         if (rc == 0) {
5674                 /* Because the ctx might be revived in dt_device_init,
5675                  * refill the env here */
5676                 lu_env_refill((struct lu_env *)env);
5677                 rc = osd_device_init0(env, o, cfg);
5678                 if (rc)
5679                         dt_device_fini(&o->od_dt_dev);
5680         }
5681
5682         if (unlikely(rc != 0))
5683                 OBD_FREE_PTR(o);
5684
5685         return rc == 0 ? osd2lu_dev(o) : ERR_PTR(rc);
5686 }
5687
5688 static struct lu_device *osd_device_free(const struct lu_env *env,
5689                                          struct lu_device *d)
5690 {
5691         struct osd_device *o = osd_dev(d);
5692         ENTRY;
5693
5694         cleanup_capa_hash(o->od_capa_hash);
5695         /* XXX: make osd top device in order to release reference */
5696         d->ld_site->ls_top_dev = d;
5697         lu_site_purge(env, d->ld_site, -1);
5698         if (!cfs_hash_is_empty(d->ld_site->ls_obj_hash)) {
5699                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
5700                 lu_site_print(env, d->ld_site, &msgdata, lu_cdebug_printer);
5701         }
5702         lu_site_fini(&o->od_site);
5703         dt_device_fini(&o->od_dt_dev);
5704         OBD_FREE_PTR(o);
5705         RETURN(NULL);
5706 }
5707
5708 static int osd_process_config(const struct lu_env *env,
5709                               struct lu_device *d, struct lustre_cfg *cfg)
5710 {
5711         struct osd_device *o = osd_dev(d);
5712         int err;
5713         ENTRY;
5714
5715         switch(cfg->lcfg_command) {
5716         case LCFG_SETUP:
5717                 err = osd_mount(env, o, cfg);
5718                 break;
5719         case LCFG_CLEANUP:
5720                 lu_dev_del_linkage(d->ld_site, d);
5721                 err = osd_shutdown(env, o);
5722                 break;
5723         default:
5724                 err = -ENOSYS;
5725         }
5726
5727         RETURN(err);
5728 }
5729
5730 static int osd_recovery_complete(const struct lu_env *env,
5731                                  struct lu_device *d)
5732 {
5733         struct osd_device       *osd = osd_dev(d);
5734         int                      rc = 0;
5735         ENTRY;
5736
5737         if (osd->od_quota_slave == NULL)
5738                 RETURN(0);
5739
5740         /* start qsd instance on recovery completion, this notifies the quota
5741          * slave code that we are about to process new requests now */
5742         rc = qsd_start(env, osd->od_quota_slave);
5743         RETURN(rc);
5744 }
5745
5746 /*
5747  * we use exports to track all osd users
5748  */
5749 static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
5750                            struct obd_device *obd, struct obd_uuid *cluuid,
5751                            struct obd_connect_data *data, void *localdata)
5752 {
5753         struct osd_device    *osd = osd_dev(obd->obd_lu_dev);
5754         struct lustre_handle  conn;
5755         int                   rc;
5756         ENTRY;
5757
5758         CDEBUG(D_CONFIG, "connect #%d\n", osd->od_connects);
5759
5760         rc = class_connect(&conn, obd, cluuid);
5761         if (rc)
5762                 RETURN(rc);
5763
5764         *exp = class_conn2export(&conn);
5765
5766         spin_lock(&osd->od_osfs_lock);
5767         osd->od_connects++;
5768         spin_unlock(&osd->od_osfs_lock);
5769
5770         RETURN(0);
5771 }
5772
5773 /*
5774  * once last export (we don't count self-export) disappeared
5775  * osd can be released
5776  */
5777 static int osd_obd_disconnect(struct obd_export *exp)
5778 {
5779         struct obd_device *obd = exp->exp_obd;
5780         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
5781         int                rc, release = 0;
5782         ENTRY;
5783
5784         /* Only disconnect the underlying layers on the final disconnect. */
5785         spin_lock(&osd->od_osfs_lock);
5786         osd->od_connects--;
5787         if (osd->od_connects == 0)
5788                 release = 1;
5789         spin_unlock(&osd->od_osfs_lock);
5790
5791         rc = class_disconnect(exp); /* bz 9811 */
5792
5793         if (rc == 0 && release)
5794                 class_manual_cleanup(obd);
5795         RETURN(rc);
5796 }
5797
5798 static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
5799                        struct lu_device *dev)
5800 {
5801         struct osd_device *osd = osd_dev(dev);
5802         int                result = 0;
5803         ENTRY;
5804
5805         if (osd->od_quota_slave != NULL)
5806                 /* set up quota slave objects */
5807                 result = qsd_prepare(env, osd->od_quota_slave);
5808
5809         RETURN(result);
5810 }
5811
5812 static const struct lu_object_operations osd_lu_obj_ops = {
5813         .loo_object_init      = osd_object_init,
5814         .loo_object_delete    = osd_object_delete,
5815         .loo_object_release   = osd_object_release,
5816         .loo_object_free      = osd_object_free,
5817         .loo_object_print     = osd_object_print,
5818         .loo_object_invariant = osd_object_invariant
5819 };
5820
5821 const struct lu_device_operations osd_lu_ops = {
5822         .ldo_object_alloc      = osd_object_alloc,
5823         .ldo_process_config    = osd_process_config,
5824         .ldo_recovery_complete = osd_recovery_complete,
5825         .ldo_prepare           = osd_prepare,
5826 };
5827
5828 static const struct lu_device_type_operations osd_device_type_ops = {
5829         .ldto_init = osd_type_init,
5830         .ldto_fini = osd_type_fini,
5831
5832         .ldto_start = osd_type_start,
5833         .ldto_stop  = osd_type_stop,
5834
5835         .ldto_device_alloc = osd_device_alloc,
5836         .ldto_device_free  = osd_device_free,
5837
5838         .ldto_device_init    = osd_device_init,
5839         .ldto_device_fini    = osd_device_fini
5840 };
5841
5842 struct lu_device_type osd_device_type = {
5843         .ldt_tags     = LU_DEVICE_DT,
5844         .ldt_name     = LUSTRE_OSD_LDISKFS_NAME,
5845         .ldt_ops      = &osd_device_type_ops,
5846         .ldt_ctx_tags = LCT_LOCAL,
5847 };
5848
5849 /*
5850  * lprocfs legacy support.
5851  */
5852 static struct obd_ops osd_obd_device_ops = {
5853         .o_owner = THIS_MODULE,
5854         .o_connect      = osd_obd_connect,
5855         .o_disconnect   = osd_obd_disconnect
5856 };
5857
5858 static int __init osd_mod_init(void)
5859 {
5860         struct lprocfs_static_vars lvars;
5861         int rc;
5862
5863         osd_oi_mod_init();
5864         lprocfs_osd_init_vars(&lvars);
5865
5866         rc = lu_kmem_init(ldiskfs_caches);
5867         if (rc)
5868                 return rc;
5869
5870         rc = class_register_type(&osd_obd_device_ops, NULL, NULL,
5871 #ifndef HAVE_ONLY_PROCFS_SEQ
5872                                 lvars.module_vars,
5873 #endif
5874                                 LUSTRE_OSD_LDISKFS_NAME, &osd_device_type);
5875         if (rc)
5876                 lu_kmem_fini(ldiskfs_caches);
5877         return rc;
5878 }
5879
5880 static void __exit osd_mod_exit(void)
5881 {
5882         class_unregister_type(LUSTRE_OSD_LDISKFS_NAME);
5883         lu_kmem_fini(ldiskfs_caches);
5884 }
5885
5886 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
5887 MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_LDISKFS_NAME")");
5888 MODULE_LICENSE("GPL");
5889
5890 cfs_module(osd, "0.1.0", osd_mod_init, osd_mod_exit);