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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/osd/osd_handler.c
  33  *
  34  * Top-level entry points into osd module
  35  *
  36  * Author: Nikita Danilov <nikita@clusterfs.com>
  37  *         Pravin Shelar <pravin.shelar@sun.com> : Added fid in dirent
  38  */
  39
  40 #define DEBUG_SUBSYSTEM S_OSD
  41
  42 #include <linux/module.h>
  43 #include <linux/user_namespace.h>
  44 #ifdef HAVE_UIDGID_HEADER
  45 # include <linux/uidgid.h>
  46 #endif
  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 #include <ldiskfs/ldiskfs.h>
  58 #include <ldiskfs/xattr.h>
  59 #include <ldiskfs/ldiskfs_extents.h>
  60 #undef ENTRY
  61 /*
  62  * struct OBD_{ALLOC,FREE}*()
  63  * OBD_FAIL_CHECK
  64  */
  65 #include <obd_support.h>
  66 /* struct ptlrpc_thread */
  67 #include <lustre_net.h>
  68 #include <lustre_fid.h>
  69 /* process_config */
  70 #include <uapi/linux/lustre_param.h>
  71
  72 #include "osd_internal.h"
  73 #include "osd_dynlocks.h"
  74
  75 /* llo_* api support */
  76 #include <md_object.h>
  77 #include <lustre_quota.h>
  78
  79 #include <lustre_linkea.h>
  80
  81 #define PFID_STRIPE_IDX_BITS    16
  82 #define PFID_STRIPE_COUNT_MASK  ((1 << PFID_STRIPE_IDX_BITS) - 1)
  83
  84 int ldiskfs_pdo = 1;
  85 module_param(ldiskfs_pdo, int, 0644);
  86 MODULE_PARM_DESC(ldiskfs_pdo, "ldiskfs with parallel directory operations");
  87
  88 int ldiskfs_track_declares_assert;
  89 module_param(ldiskfs_track_declares_assert, int, 0644);
  90 MODULE_PARM_DESC(ldiskfs_track_declares_assert, "LBUG during tracking of declares");
  91
  92 /* Slab to allocate dynlocks */
  93 struct kmem_cache *dynlock_cachep;
  94
  95 /* Slab to allocate osd_it_ea */
  96 struct kmem_cache *osd_itea_cachep;
  97
  98 static struct lu_kmem_descr ldiskfs_caches[] = {
  99         {
 100                 .ckd_cache = &dynlock_cachep,
 101                 .ckd_name  = "dynlock_cache",
 102                 .ckd_size  = sizeof(struct dynlock_handle)
 103         },
 104         {
 105                 .ckd_cache = &osd_itea_cachep,
 106                 .ckd_name  = "osd_itea_cache",
 107                 .ckd_size  = sizeof(struct osd_it_ea)
 108         },
 109         {
 110                 .ckd_cache = NULL
 111         }
 112 };
 113
 114 static const char dot[] = ".";
 115 static const char dotdot[] = "..";
 116
 117 static const struct lu_object_operations      osd_lu_obj_ops;
 118 static const struct dt_object_operations      osd_obj_ops;
 119 static const struct dt_object_operations      osd_obj_otable_it_ops;
 120 static const struct dt_index_operations       osd_index_iam_ops;
 121 static const struct dt_index_operations       osd_index_ea_ops;
 122
 123 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
 124                           const struct lu_fid *fid);
 125 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
 126                                                 struct osd_device *osd);
 127
 128 int osd_trans_declare_op2rb[] = {
 129         [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
 130         [OSD_OT_PUNCH]          = OSD_OT_MAX,
 131         [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
 132         [OSD_OT_CREATE]         = OSD_OT_DESTROY,
 133         [OSD_OT_DESTROY]        = OSD_OT_CREATE,
 134         [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
 135         [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
 136         [OSD_OT_WRITE]          = OSD_OT_WRITE,
 137         [OSD_OT_INSERT]         = OSD_OT_DELETE,
 138         [OSD_OT_DELETE]         = OSD_OT_INSERT,
 139         [OSD_OT_QUOTA]          = OSD_OT_MAX,
 140 };
 141
 142 static int osd_has_index(const struct osd_object *obj)
 143 {
 144         return obj->oo_dt.do_index_ops != NULL;
 145 }
 146
 147 static int osd_object_invariant(const struct lu_object *l)
 148 {
 149         return osd_invariant(osd_obj(l));
 150 }
 151
 152 /*
 153  * Concurrency: doesn't matter
 154  */
 155 static int osd_is_write_locked(const struct lu_env *env, struct osd_object *o)
 156 {
 157         struct osd_thread_info *oti = osd_oti_get(env);
 158         return oti->oti_w_locks > 0 && o->oo_owner == env;
 159 }
 160
 161 /*
 162  * Concurrency: doesn't access mutable data
 163  */
 164 static int osd_root_get(const struct lu_env *env,
 165                         struct dt_device *dev, struct lu_fid *f)
 166 {
 167         lu_local_obj_fid(f, OSD_FS_ROOT_OID);
 168         return 0;
 169 }
 170
 171 /*
 172  * the following set of functions are used to maintain per-thread
 173  * cache of FID->ino mapping. this mechanism is needed to resolve
 174  * FID to inode at dt_insert() which in turn stores ino in the
 175  * directory entries to keep ldiskfs compatible with ext[34].
 176  * due to locking-originated restrictions we can't lookup ino
 177  * using LU cache (deadlock is possible). lookup using OI is quite
 178  * expensive. so instead we maintain this cache and methods like
 179  * dt_create() fill it. so in the majority of cases dt_insert() is
 180  * able to find needed mapping in lockless manner.
 181  */
 182 static struct osd_idmap_cache *
 183 osd_idc_find(const struct lu_env *env, struct osd_device *osd,
 184              const struct lu_fid *fid)
 185 {
 186         struct osd_thread_info  *oti   = osd_oti_get(env);
 187         struct osd_idmap_cache  *idc    = oti->oti_ins_cache;
 188         int i;
 189         for (i = 0; i < oti->oti_ins_cache_used; i++) {
 190                 if (!lu_fid_eq(&idc[i].oic_fid, fid))
 191                         continue;
 192                 if (idc[i].oic_dev != osd)
 193                         continue;
 194
 195                 return idc + i;
 196         }
 197
 198         return NULL;
 199 }
 200
 201 static struct osd_idmap_cache *
 202 osd_idc_add(const struct lu_env *env, struct osd_device *osd,
 203             const struct lu_fid *fid)
 204 {
 205         struct osd_thread_info  *oti   = osd_oti_get(env);
 206         struct osd_idmap_cache  *idc;
 207         int i;
 208
 209         if (unlikely(oti->oti_ins_cache_used >= oti->oti_ins_cache_size)) {
 210                 i = oti->oti_ins_cache_size * 2;
 211                 if (i == 0)
 212                         i = OSD_INS_CACHE_SIZE;
 213                 OBD_ALLOC(idc, sizeof(*idc) * i);
 214                 if (idc == NULL)
 215                         return ERR_PTR(-ENOMEM);
 216                 if (oti->oti_ins_cache != NULL) {
 217                         memcpy(idc, oti->oti_ins_cache,
 218                                oti->oti_ins_cache_used * sizeof(*idc));
 219                         OBD_FREE(oti->oti_ins_cache,
 220                                  oti->oti_ins_cache_used * sizeof(*idc));
 221                 }
 222                 oti->oti_ins_cache = idc;
 223                 oti->oti_ins_cache_size = i;
 224         }
 225
 226         idc = oti->oti_ins_cache + oti->oti_ins_cache_used++;
 227         idc->oic_fid = *fid;
 228         idc->oic_dev = osd;
 229         idc->oic_lid.oii_ino = 0;
 230         idc->oic_lid.oii_gen = 0;
 231         idc->oic_remote = 0;
 232
 233         return idc;
 234 }
 235
 236 /*
 237  * lookup mapping for the given fid in the cache, initialize a
 238  * new one if not found. the initialization checks whether the
 239  * object is local or remote. for local objects, OI is used to
 240  * learn ino/generation. the function is used when the caller
 241  * has no information about the object, e.g. at dt_insert().
 242  */
 243 static struct osd_idmap_cache *
 244 osd_idc_find_or_init(const struct lu_env *env, struct osd_device *osd,
 245                      const struct lu_fid *fid)
 246 {
 247         struct osd_idmap_cache *idc;
 248         int rc;
 249
 250         idc = osd_idc_find(env, osd, fid);
 251         LASSERT(!IS_ERR(idc));
 252         if (idc != NULL)
 253                 return idc;
 254
 255         /* new mapping is needed */
 256         idc = osd_idc_add(env, osd, fid);
 257         if (IS_ERR(idc))
 258                 return idc;
 259
 260         /* initialize it */
 261         rc = osd_remote_fid(env, osd, fid);
 262         if (unlikely(rc < 0))
 263                 return ERR_PTR(rc);
 264
 265         if (rc == 0) {
 266                 /* the object is local, lookup in OI */
 267                 /* XXX: probably cheaper to lookup in LU first? */
 268                 rc = osd_oi_lookup(osd_oti_get(env), osd, fid,
 269                                    &idc->oic_lid, 0);
 270                 if (unlikely(rc < 0)) {
 271                         CERROR("can't lookup: rc = %d\n", rc);
 272                         return ERR_PTR(rc);
 273                 }
 274         } else {
 275                 /* the object is remote */
 276                 idc->oic_remote = 1;
 277         }
 278
 279         return idc;
 280 }
 281
 282 /*
 283  * lookup mapping for given FID and fill it from the given object.
 284  * the object is lolcal by definition.
 285  */
 286 static int osd_idc_find_and_init(const struct lu_env *env,
 287                                  struct osd_device *osd,
 288                                  struct osd_object *obj)
 289 {
 290         const struct lu_fid     *fid = lu_object_fid(&obj->oo_dt.do_lu);
 291         struct osd_idmap_cache  *idc;
 292
 293         idc = osd_idc_find(env, osd, fid);
 294         LASSERT(!IS_ERR(idc));
 295         if (idc != NULL) {
 296                 if (obj->oo_inode == NULL)
 297                         return 0;
 298                 if (idc->oic_lid.oii_ino != obj->oo_inode->i_ino) {
 299                         LASSERT(idc->oic_lid.oii_ino == 0);
 300                         idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
 301                         idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
 302                 }
 303                 return 0;
 304         }
 305
 306         /* new mapping is needed */
 307         idc = osd_idc_add(env, osd, fid);
 308         if (IS_ERR(idc))
 309                 return PTR_ERR(idc);
 310
 311         if (obj->oo_inode != NULL) {
 312                 idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
 313                 idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
 314         }
 315         return 0;
 316 }
 317
 318 /*
 319  * OSD object methods.
 320  */
 321
 322 /*
 323  * Concurrency: no concurrent access is possible that early in object
 324  * life-cycle.
 325  */
 326 static struct lu_object *osd_object_alloc(const struct lu_env *env,
 327                                           const struct lu_object_header *hdr,
 328                                           struct lu_device *d)
 329 {
 330         struct osd_object *mo;
 331
 332         OBD_ALLOC_PTR(mo);
 333         if (mo != NULL) {
 334                 struct lu_object *l;
 335
 336                 l = &mo->oo_dt.do_lu;
 337                 dt_object_init(&mo->oo_dt, NULL, d);
 338                 mo->oo_dt.do_ops = &osd_obj_ops;
 339                 l->lo_ops = &osd_lu_obj_ops;
 340                 init_rwsem(&mo->oo_sem);
 341                 init_rwsem(&mo->oo_ext_idx_sem);
 342                 spin_lock_init(&mo->oo_guard);
 343                 INIT_LIST_HEAD(&mo->oo_xattr_list);
 344                 return l;
 345         } else {
 346                 return NULL;
 347         }
 348 }
 349
 350 int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
 351                 struct dentry *dentry, struct lustre_ost_attrs *loa)
 352 {
 353         int rc;
 354
 355         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 356                              (void *)loa, sizeof(*loa));
 357         if (rc > 0) {
 358                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
 359
 360                 if (rc < sizeof(*lma))
 361                         return -EINVAL;
 362
 363                 rc = 0;
 364                 lustre_loa_swab(loa, true);
 365                 /* Check LMA compatibility */
 366                 if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
 367                         CWARN("%s: unsupported incompat LMA feature(s) %#x "
 368                               "for fid = "DFID", ino = %lu\n",
 369                               osd_ino2name(inode),
 370                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 371                               PFID(&lma->lma_self_fid), inode->i_ino);
 372                         rc = -EOPNOTSUPP;
 373                 }
 374         } else if (rc == 0) {
 375                 rc = -ENODATA;
 376         }
 377
 378         return rc;
 379 }
 380
 381 /*
 382  * retrieve object from backend ext fs.
 383  **/
 384 struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
 385                        struct osd_inode_id *id)
 386 {
 387         int rc;
 388         struct inode *inode = NULL;
 389
 390         /* if we look for an inode withing a running
 391          * transaction, then we risk to deadlock */
 392         /* osd_dirent_check_repair() breaks this */
 393         /*LASSERT(current->journal_info == NULL);*/
 394
 395         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
 396         if (IS_ERR(inode)) {
 397                 CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
 398                        id->oii_ino, PTR_ERR(inode));
 399         } else if (id->oii_gen != OSD_OII_NOGEN &&
 400                    inode->i_generation != id->oii_gen) {
 401                 CDEBUG(D_INODE, "unmatched inode: ino = %u, oii_gen = %u, "
 402                        "i_generation = %u\n",
 403                        id->oii_ino, id->oii_gen, inode->i_generation);
 404                 iput(inode);
 405                 inode = ERR_PTR(-ESTALE);
 406         } else if (inode->i_nlink == 0) {
 407                 /* due to parallel readdir and unlink,
 408                 * we can have dead inode here. */
 409                 CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
 410                 iput(inode);
 411                 inode = ERR_PTR(-ESTALE);
 412         } else if (is_bad_inode(inode)) {
 413                 CWARN("%s: bad inode: ino = %u\n",
 414                 osd_dev2name(dev), id->oii_ino);
 415                 iput(inode);
 416                 inode = ERR_PTR(-ENOENT);
 417         } else if ((rc = osd_attach_jinode(inode))) {
 418                 iput(inode);
 419                 inode = ERR_PTR(rc);
 420         } else {
 421                 ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
 422                 if (id->oii_gen == OSD_OII_NOGEN)
 423                         osd_id_gen(id, inode->i_ino, inode->i_generation);
 424
 425                 /* Do not update file c/mtime in ldiskfs.
 426                  * NB: we don't have any lock to protect this because we don't
 427                  * have reference on osd_object now, but contention with
 428                  * another lookup + attr_set can't happen in the tiny window
 429                  * between if (...) and set S_NOCMTIME. */
 430                 if (!(inode->i_flags & S_NOCMTIME))
 431                         inode->i_flags |= S_NOCMTIME;
 432         }
 433         return inode;
 434 }
 435
 436 int osd_ldiskfs_add_entry(struct osd_thread_info *info, struct osd_device *osd,
 437                           handle_t *handle, struct dentry *child,
 438                           struct inode *inode, struct htree_lock *hlock)
 439 {
 440         int rc, rc2;
 441
 442         rc = __ldiskfs_add_entry(handle, child, inode, hlock);
 443         if (rc == -ENOBUFS || rc == -ENOSPC) {
 444                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 445                 struct inode *parent = child->d_parent->d_inode;
 446                 struct lu_fid *fid = NULL;
 447
 448                 rc2 = osd_get_lma(info, parent, child->d_parent, loa);
 449                 if (!rc2) {
 450                         fid = &loa->loa_lma.lma_self_fid;
 451                 } else if (rc2 == -ENODATA) {
 452                         if (unlikely(parent == inode->i_sb->s_root->d_inode)) {
 453                                 fid = &info->oti_fid3;
 454                                 lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
 455                         } else if (!osd->od_is_ost && osd->od_index == 0) {
 456                                 fid = &info->oti_fid3;
 457                                 lu_igif_build(fid, parent->i_ino,
 458                                               parent->i_generation);
 459                         }
 460                 }
 461
 462                 if (fid != NULL)
 463                         CWARN("%s: directory (inode: %lu, FID: "DFID") %s "
 464                               "maximum entry limit\n",
 465                               osd_name(osd), parent->i_ino, PFID(fid),
 466                               rc == -ENOSPC ? "has reached" : "is approaching");
 467                 else
 468                         CWARN("%s: directory (inode: %lu, FID: unknown) %s "
 469                               "maximum entry limit\n",
 470                               osd_name(osd), parent->i_ino,
 471                               rc == -ENOSPC ? "has reached" : "is approaching");
 472
 473                 /* ignore such error now */
 474                 if (rc == -ENOBUFS)
 475                         rc = 0;
 476         }
 477
 478         return rc;
 479 }
 480
 481
 482 static struct inode *
 483 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
 484              struct osd_inode_id *id, struct lu_fid *fid)
 485 {
 486         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 487         struct inode *inode;
 488         int rc;
 489
 490         inode = osd_iget(info, dev, id);
 491         if (IS_ERR(inode))
 492                 return inode;
 493
 494         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
 495         if (!rc) {
 496                 *fid = loa->loa_lma.lma_self_fid;
 497         } else if (rc == -ENODATA) {
 498                 if (unlikely(inode == osd_sb(dev)->s_root->d_inode))
 499                         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
 500                 else
 501                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 502         } else {
 503                 iput(inode);
 504                 inode = ERR_PTR(rc);
 505         }
 506         return inode;
 507 }
 508
 509 static struct inode *osd_iget_check(struct osd_thread_info *info,
 510                                     struct osd_device *dev,
 511                                     const struct lu_fid *fid,
 512                                     struct osd_inode_id *id,
 513                                     bool trusted)
 514 {
 515         struct inode *inode;
 516         int rc = 0;
 517         ENTRY;
 518
 519         /* The cached OI mapping is trustable. If we cannot locate the inode
 520          * via the cached OI mapping, then return the failure to the caller
 521          * directly without further OI checking. */
 522
 523 again:
 524         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
 525         if (IS_ERR(inode)) {
 526                 rc = PTR_ERR(inode);
 527                 if (!trusted && (rc == -ENOENT || rc == -ESTALE))
 528                         goto check_oi;
 529
 530                 CDEBUG(D_INODE, "no inode for FID: "DFID", ino = %u, rc = %d\n",
 531                        PFID(fid), id->oii_ino, rc);
 532                 GOTO(put, rc);
 533         }
 534
 535         if (is_bad_inode(inode)) {
 536                 rc = -ENOENT;
 537                 if (!trusted)
 538                         goto check_oi;
 539
 540                 CDEBUG(D_INODE, "bad inode for FID: "DFID", ino = %u\n",
 541                        PFID(fid), id->oii_ino);
 542                 GOTO(put, rc);
 543         }
 544
 545         if (id->oii_gen != OSD_OII_NOGEN &&
 546             inode->i_generation != id->oii_gen) {
 547                 rc = -ESTALE;
 548                 if (!trusted)
 549                         goto check_oi;
 550
 551                 CDEBUG(D_INODE, "unmatched inode for FID: "DFID", ino = %u, "
 552                        "oii_gen = %u, i_generation = %u\n", PFID(fid),
 553                        id->oii_ino, id->oii_gen, inode->i_generation);
 554                 GOTO(put, rc);
 555         }
 556
 557         if (inode->i_nlink == 0) {
 558                 rc = -ENOENT;
 559                 if (!trusted)
 560                         goto check_oi;
 561
 562                 CDEBUG(D_INODE, "stale inode for FID: "DFID", ino = %u\n",
 563                        PFID(fid), id->oii_ino);
 564                 GOTO(put, rc);
 565         }
 566
 567         ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
 568
 569 check_oi:
 570         if (rc != 0) {
 571                 __u32 saved_ino = id->oii_ino;
 572                 __u32 saved_gen = id->oii_gen;
 573
 574                 LASSERT(!trusted);
 575                 LASSERTF(rc == -ESTALE || rc == -ENOENT, "rc = %d\n", rc);
 576
 577                 rc = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
 578                 /* XXX: There are four possible cases:
 579                  *      1. rc = 0.
 580                  *         Backup/restore caused the OI invalid.
 581                  *      2. rc = 0.
 582                  *         Someone unlinked the object but NOT removed
 583                  *         the OI mapping, such as mount target device
 584                  *         as ldiskfs, and modify something directly.
 585                  *      3. rc = -ENOENT.
 586                  *         Someone just removed the object between the
 587                  *         former oi_lookup and the iget. It is normal.
 588                  *      4. Other failure cases.
 589                  *
 590                  *      Generally, when the device is mounted, it will
 591                  *      auto check whether the system is restored from
 592                  *      file-level backup or not. We trust such detect
 593                  *      to distinguish the 1st case from the 2nd case:
 594                  *      if the OI files are consistent but may contain
 595                  *      stale OI mappings because of case 2, if iget()
 596                  *      returns -ENOENT or -ESTALE, then it should be
 597                  *      the case 2. */
 598                 if (rc != 0)
 599                         /* If the OI mapping was in OI file before the
 600                          * osd_iget_check(), but now, it is disappear,
 601                          * then it must be removed by race. That is a
 602                          * normal race case. */
 603                         GOTO(put, rc);
 604
 605                 /* It is the OI scrub updated the OI mapping by race.
 606                  * The new OI mapping must be valid. */
 607                 if (saved_ino != id->oii_ino ||
 608                     (saved_gen != id->oii_gen && saved_gen != OSD_OII_NOGEN)) {
 609                         if (!IS_ERR(inode))
 610                                 iput(inode);
 611
 612                         trusted = true;
 613                         goto again;
 614                 }
 615
 616                 if (IS_ERR(inode)) {
 617                         if (dev->od_scrub.os_file.sf_flags & SF_INCONSISTENT)
 618                                 /* It still can be the case 2, but we cannot
 619                                  * distinguish it from the case 1. So return
 620                                  * -EREMCHG to block current operation until
 621                                  *  OI scrub rebuilt the OI mappings. */
 622                                 rc = -EREMCHG;
 623                         else
 624                                 rc = -ENOENT;
 625
 626                         GOTO(put, rc);
 627                 }
 628
 629                 if (inode->i_generation == id->oii_gen)
 630                         rc = -ENOENT;
 631                 else
 632                         rc = -EREMCHG;
 633         } else {
 634                 if (id->oii_gen == OSD_OII_NOGEN)
 635                         osd_id_gen(id, inode->i_ino, inode->i_generation);
 636
 637                 /* Do not update file c/mtime in ldiskfs.
 638                  * NB: we don't have any lock to protect this because we don't
 639                  * have reference on osd_object now, but contention with
 640                  * another lookup + attr_set can't happen in the tiny window
 641                  * between if (...) and set S_NOCMTIME. */
 642                 if (!(inode->i_flags & S_NOCMTIME))
 643                         inode->i_flags |= S_NOCMTIME;
 644         }
 645
 646         GOTO(put, rc);
 647
 648 put:
 649         if (rc != 0) {
 650                 if (!IS_ERR(inode))
 651                         iput(inode);
 652
 653                 inode = ERR_PTR(rc);
 654         }
 655
 656         return inode;
 657 }
 658
 659 /**
 660  * \retval +v: new filter_fid, does not contain self-fid
 661  * \retval 0:  filter_fid_old, contains self-fid
 662  * \retval -v: other failure cases
 663  */
 664 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
 665                  struct dentry *dentry, struct lu_fid *fid)
 666 {
 667         struct filter_fid_old   *ff     = &info->oti_ff;
 668         struct ost_id           *ostid  = &info->oti_ostid;
 669         int                      rc;
 670
 671         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
 672         if (rc == sizeof(*ff)) {
 673                 rc = 0;
 674                 ostid_set_seq(ostid, le64_to_cpu(ff->ff_seq));
 675                 rc = ostid_set_id(ostid, le64_to_cpu(ff->ff_objid));
 676                 /*
 677                  * XXX: use 0 as the index for compatibility, the caller will
 678                  *      handle index related issues when necessary.
 679                  */
 680                 if (!rc)
 681                         ostid_to_fid(fid, ostid, 0);
 682         } else if (rc == sizeof(struct filter_fid)) {
 683                 rc = 1;
 684         } else if (rc >= 0) {
 685                 rc = -EINVAL;
 686         }
 687
 688         return rc;
 689 }
 690
 691 static int osd_lma_self_repair(struct osd_thread_info *info,
 692                                struct osd_device *osd, struct inode *inode,
 693                                const struct lu_fid *fid, __u32 compat)
 694 {
 695         handle_t *jh;
 696         int       rc;
 697
 698         LASSERT(current->journal_info == NULL);
 699
 700         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
 701                                   osd_dto_credits_noquota[DTO_XATTR_SET]);
 702         if (IS_ERR(jh)) {
 703                 rc = PTR_ERR(jh);
 704                 CWARN("%s: cannot start journal for lma_self_repair: rc = %d\n",
 705                       osd_name(osd), rc);
 706                 return rc;
 707         }
 708
 709         rc = osd_ea_fid_set(info, inode, fid, compat, 0);
 710         if (rc != 0)
 711                 CWARN("%s: cannot self repair the LMA: rc = %d\n",
 712                       osd_name(osd), rc);
 713         ldiskfs_journal_stop(jh);
 714         return rc;
 715 }
 716
 717 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
 718 {
 719         struct osd_thread_info  *info   = osd_oti_get(env);
 720         struct osd_device       *osd    = osd_obj2dev(obj);
 721         struct lustre_ost_attrs *loa    = &info->oti_ost_attrs;
 722         struct lustre_mdt_attrs *lma    = &loa->loa_lma;
 723         struct inode            *inode  = obj->oo_inode;
 724         struct dentry           *dentry = &info->oti_obj_dentry;
 725         struct lu_fid           *fid    = NULL;
 726         const struct lu_fid     *rfid   = lu_object_fid(&obj->oo_dt.do_lu);
 727         int                      rc;
 728         ENTRY;
 729
 730         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 731                              (void *)loa, sizeof(*loa));
 732         if (rc == -ENODATA && !fid_is_igif(rfid) && osd->od_check_ff) {
 733                 fid = &lma->lma_self_fid;
 734                 rc = osd_get_idif(info, inode, dentry, fid);
 735                 if ((rc > 0) || (rc == -ENODATA && osd->od_index_in_idif)) {
 736                         /* For the given OST-object, if it has neither LMA nor
 737                          * FID in XATTR_NAME_FID, then the given FID (which is
 738                          * contained in the @obj, from client RPC for locating
 739                          * the OST-object) is trusted. We use it to generate
 740                          * the LMA. */
 741                         osd_lma_self_repair(info, osd, inode, rfid,
 742                                             LMAC_FID_ON_OST);
 743                         RETURN(0);
 744                 }
 745         }
 746
 747         if (rc < 0)
 748                 RETURN(rc);
 749
 750         if (rc > 0) {
 751                 rc = 0;
 752                 lustre_lma_swab(lma);
 753                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
 754                              (CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT) &&
 755                               S_ISREG(inode->i_mode)))) {
 756                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
 757                               "fid = "DFID", ino = %lu\n", osd_name(osd),
 758                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 759                               PFID(rfid), inode->i_ino);
 760                         rc = -EOPNOTSUPP;
 761                 } else {
 762                         fid = &lma->lma_self_fid;
 763                 }
 764         }
 765
 766         if (fid != NULL && unlikely(!lu_fid_eq(rfid, fid))) {
 767                 if (fid_is_idif(rfid) && fid_is_idif(fid)) {
 768                         struct ost_id   *oi   = &info->oti_ostid;
 769                         struct lu_fid   *fid1 = &info->oti_fid3;
 770                         __u32            idx  = fid_idif_ost_idx(rfid);
 771
 772                         /* For old IDIF, the OST index is not part of the IDIF,
 773                          * Means that different OSTs may have the same IDIFs.
 774                          * Under such case, we need to make some compatible
 775                          * check to make sure to trigger OI scrub properly. */
 776                         if (idx != 0 && fid_idif_ost_idx(fid) == 0) {
 777                                 /* Given @rfid is new, LMA is old. */
 778                                 fid_to_ostid(fid, oi);
 779                                 ostid_to_fid(fid1, oi, idx);
 780                                 if (lu_fid_eq(fid1, rfid)) {
 781                                         if (osd->od_index_in_idif)
 782                                                 osd_lma_self_repair(info, osd,
 783                                                         inode, rfid,
 784                                                         LMAC_FID_ON_OST);
 785                                         RETURN(0);
 786                                 }
 787                         }
 788                 }
 789
 790                 rc = -EREMCHG;
 791         }
 792
 793         RETURN(rc);
 794 }
 795
 796 struct osd_check_lmv_buf {
 797 #ifdef HAVE_DIR_CONTEXT
 798         /* please keep it as first member */
 799         struct dir_context       ctx;
 800 #endif
 801         struct osd_thread_info  *oclb_info;
 802         struct osd_device       *oclb_dev;
 803         struct osd_idmap_cache  *oclb_oic;
 804 };
 805
 806 /**
 807  * It is called internally by ->readdir() to filter out the
 808  * local slave object's FID of the striped directory.
 809  *
 810  * \retval      1 found the local slave's FID
 811  * \retval      0 continue to check next item
 812  * \retval      -ve for failure
 813  */
 814 #ifdef HAVE_FILLDIR_USE_CTX
 815 static int osd_stripe_dir_filldir(struct dir_context *buf,
 816 #else
 817 static int osd_stripe_dir_filldir(void *buf,
 818 #endif
 819                                   const char *name, int namelen,
 820                                   loff_t offset, __u64 ino, unsigned d_type)
 821 {
 822         struct osd_check_lmv_buf *oclb = (struct osd_check_lmv_buf *)buf;
 823         struct osd_thread_info *oti = oclb->oclb_info;
 824         struct lu_fid *fid = &oti->oti_fid3;
 825         struct osd_inode_id *id = &oti->oti_id3;
 826         struct osd_device *dev = oclb->oclb_dev;
 827         struct osd_idmap_cache *oic = oclb->oclb_oic;
 828         struct inode *inode;
 829         int rc;
 830
 831         if (name[0] == '.')
 832                 return 0;
 833
 834         fid_zero(fid);
 835         sscanf(name + 1, SFID, RFID(fid));
 836         if (!fid_is_sane(fid))
 837                 return 0;
 838
 839         if (osd_remote_fid(oti->oti_env, dev, fid))
 840                 return 0;
 841
 842         osd_id_gen(id, ino, OSD_OII_NOGEN);
 843         inode = osd_iget(oti, dev, id);
 844         if (IS_ERR(inode))
 845                 return PTR_ERR(inode);
 846
 847         iput(inode);
 848         osd_add_oi_cache(oti, dev, id, fid);
 849         oic->oic_fid = *fid;
 850         oic->oic_lid = *id;
 851         oic->oic_dev = dev;
 852         rc = osd_oii_insert(dev, oic, true);
 853
 854         return rc == 0 ? 1 : rc;
 855 }
 856
 857 /* When lookup item under striped directory, we need to locate the master
 858  * MDT-object of the striped directory firstly, then the client will send
 859  * lookup (getattr_by_name) RPC to the MDT with some slave MDT-object's FID
 860  * and the item's name. If the system is restored from MDT file level backup,
 861  * then before the OI scrub completely built the OI files, the OI mappings of
 862  * the master MDT-object and slave MDT-object may be invalid. Usually, it is
 863  * not a problem for the master MDT-object. Because when locate the master
 864  * MDT-object, we will do name based lookup (for the striped directory itself)
 865  * firstly, during such process we can setup the correct OI mapping for the
 866  * master MDT-object. But it will be trouble for the slave MDT-object. Because
 867  * the client will not trigger name based lookup on the MDT to locate the slave
 868  * MDT-object before locating item under the striped directory, then when
 869  * osd_fid_lookup(), it will find that the OI mapping for the slave MDT-object
 870  * is invalid and does not know what the right OI mapping is, then the MDT has
 871  * to return -EINPROGRESS to the client to notify that the OI scrub is rebuiding
 872  * the OI file, related OI mapping is unknown yet, please try again later. And
 873  * then client will re-try the RPC again and again until related OI mapping has
 874  * been updated. That is quite inefficient.
 875  *
 876  * To resolve above trouble, we will handle it as the following two cases:
 877  *
 878  * 1) The slave MDT-object and the master MDT-object are on different MDTs.
 879  *    It is relative easy. Be as one of remote MDT-objects, the slave MDT-object
 880  *    is linked under /REMOTE_PARENT_DIR with the name of its FID string.
 881  *    We can locate the slave MDT-object via lookup the /REMOTE_PARENT_DIR
 882  *    directly. Please check osd_fid_lookup().
 883  *
 884  * 2) The slave MDT-object and the master MDT-object reside on the same MDT.
 885  *    Under such case, during lookup the master MDT-object, we will lookup the
 886  *    slave MDT-object via readdir against the master MDT-object, because the
 887  *    slave MDT-objects information are stored as sub-directories with the name
 888  *    "${FID}:${index}". Then when find the local slave MDT-object, its OI
 889  *    mapping will be recorded. Then subsequent osd_fid_lookup() will know
 890  *    the correct OI mapping for the slave MDT-object. */
 891 static int osd_check_lmv(struct osd_thread_info *oti, struct osd_device *dev,
 892                          struct inode *inode, struct osd_idmap_cache *oic)
 893 {
 894         struct lu_buf *buf = &oti->oti_big_buf;
 895         struct dentry *dentry = &oti->oti_obj_dentry;
 896         struct file *filp = &oti->oti_file;
 897         const struct file_operations *fops;
 898         struct lmv_mds_md_v1 *lmv1;
 899         struct osd_check_lmv_buf oclb = {
 900 #ifdef HAVE_DIR_CONTEXT
 901                 .ctx.actor = osd_stripe_dir_filldir,
 902 #endif
 903                 .oclb_info = oti,
 904                 .oclb_dev = dev,
 905                 .oclb_oic = oic
 906         };
 907         int rc = 0;
 908         ENTRY;
 909
 910 again:
 911         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMV, buf->lb_buf,
 912                              buf->lb_len);
 913         if (rc == -ERANGE) {
 914                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMV, NULL, 0);
 915                 if (rc > 0) {
 916                         lu_buf_realloc(buf, rc);
 917                         if (buf->lb_buf == NULL)
 918                                 GOTO(out, rc = -ENOMEM);
 919
 920                         goto again;
 921                 }
 922         }
 923
 924         if (unlikely(rc == 0 || rc == -ENODATA))
 925                 GOTO(out, rc = 0);
 926
 927         if (rc < 0)
 928                 GOTO(out, rc);
 929
 930         if (unlikely(buf->lb_buf == NULL)) {
 931                 lu_buf_realloc(buf, rc);
 932                 if (buf->lb_buf == NULL)
 933                         GOTO(out, rc = -ENOMEM);
 934
 935                 goto again;
 936         }
 937
 938         lmv1 = buf->lb_buf;
 939         if (le32_to_cpu(lmv1->lmv_magic) != LMV_MAGIC_V1)
 940                 GOTO(out, rc = 0);
 941
 942         fops = inode->i_fop;
 943         dentry->d_inode = inode;
 944         dentry->d_sb = inode->i_sb;
 945         filp->f_pos = 0;
 946         filp->f_path.dentry = dentry;
 947         filp->f_mode = FMODE_64BITHASH;
 948         filp->f_mapping = inode->i_mapping;
 949         filp->f_op = fops;
 950         filp->private_data = NULL;
 951         set_file_inode(filp, inode);
 952
 953 #ifdef HAVE_DIR_CONTEXT
 954         oclb.ctx.pos = filp->f_pos;
 955         rc = fops->iterate(filp, &oclb.ctx);
 956         filp->f_pos = oclb.ctx.pos;
 957 #else
 958         rc = fops->readdir(filp, &oclb, osd_stripe_dir_filldir);
 959 #endif
 960         fops->release(inode, filp);
 961
 962 out:
 963         if (rc < 0)
 964                 CDEBUG(D_LFSCK, "%s: fail to check LMV EA, inode = %lu/%u,"
 965                        DFID": rc = %d\n", osd_ino2name(inode),
 966                        inode->i_ino, inode->i_generation,
 967                        PFID(&oic->oic_fid), rc);
 968         else
 969                 rc = 0;
 970
 971         RETURN(rc);
 972 }
 973
 974 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
 975                           const struct lu_fid *fid,
 976                           const struct lu_object_conf *conf)
 977 {
 978         struct osd_thread_info *info;
 979         struct lu_device *ldev = obj->oo_dt.do_lu.lo_dev;
 980         struct osd_device *dev;
 981         struct osd_idmap_cache *oic;
 982         struct osd_inode_id *id;
 983         struct inode *inode = NULL;
 984         struct osd_scrub *scrub;
 985         struct scrub_file *sf;
 986         __u32 flags = SS_CLEAR_DRYRUN | SS_CLEAR_FAILOUT | SS_AUTO_FULL;
 987         __u32 saved_ino;
 988         __u32 saved_gen;
 989         int result = 0;
 990         int rc1 = 0;
 991         bool remote = false;
 992         bool trusted = true;
 993         bool updated = false;
 994         ENTRY;
 995
 996         LINVRNT(osd_invariant(obj));
 997         LASSERT(obj->oo_inode == NULL);
 998         LASSERTF(fid_is_sane(fid) || fid_is_idif(fid), DFID"\n", PFID(fid));
 999
1000         dev = osd_dev(ldev);
1001         scrub = &dev->od_scrub;
1002         sf = &scrub->os_file;
1003         info = osd_oti_get(env);
1004         LASSERT(info);
1005         oic = &info->oti_cache;
1006
1007         if (OBD_FAIL_CHECK(OBD_FAIL_SRV_ENOENT))
1008                 RETURN(-ENOENT);
1009
1010         /* For the object is created as locking anchor, or for the object to
1011          * be created on disk. No need to osd_oi_lookup() at here because FID
1012          * shouldn't never be re-used, if it's really a duplicate FID from
1013          * unexpected reason, we should be able to detect it later by calling
1014          * do_create->osd_oi_insert(). */
1015         if (conf && conf->loc_flags & LOC_F_NEW)
1016                 GOTO(out, result = 0);
1017
1018         /* Search order: 1. per-thread cache. */
1019         if (lu_fid_eq(fid, &oic->oic_fid) && likely(oic->oic_dev == dev)) {
1020                 id = &oic->oic_lid;
1021                 goto iget;
1022         }
1023
1024         id = &info->oti_id;
1025         if (!list_empty(&scrub->os_inconsistent_items)) {
1026                 /* Search order: 2. OI scrub pending list. */
1027                 result = osd_oii_lookup(dev, fid, id);
1028                 if (!result)
1029                         goto iget;
1030         }
1031
1032         /* The OI mapping in the OI file can be updated by the OI scrub
1033          * when we locate the inode via FID. So it may be not trustable. */
1034         trusted = false;
1035
1036         /* Search order: 3. OI files. */
1037         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1038         if (result == -ENOENT) {
1039                 if (!(fid_is_norm(fid) || fid_is_igif(fid)) ||
1040                     fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
1041                     !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
1042                                       sf->sf_oi_bitmap))
1043                         GOTO(out, result = 0);
1044
1045                 goto trigger;
1046         }
1047
1048         if (result)
1049                 GOTO(out, result);
1050
1051 iget:
1052         obj->oo_inode = NULL;
1053         /* for later passes through checks, not true on first pass */
1054         if (!IS_ERR_OR_NULL(inode))
1055                 iput(inode);
1056
1057         inode = osd_iget_check(info, dev, fid, id, trusted);
1058         if (!IS_ERR(inode)) {
1059                 obj->oo_inode = inode;
1060                 result = 0;
1061                 if (remote)
1062                         goto trigger;
1063
1064                 goto check_lma;
1065         }
1066
1067         result = PTR_ERR(inode);
1068         if (result == -ENOENT || result == -ESTALE)
1069                 GOTO(out, result = 0);
1070
1071         if (result != -EREMCHG)
1072                 GOTO(out, result);
1073
1074 trigger:
1075         /* We still have chance to get the valid inode: for the
1076          * object which is referenced by remote name entry, the
1077          * object on the local MDT will be linked under the dir
1078          * of "/REMOTE_PARENT_DIR" with its FID string as name.
1079          *
1080          * We do not know whether the object for the given FID
1081          * is referenced by some remote name entry or not, and
1082          * especially for DNE II, a multiple-linked object may
1083          * have many name entries reside on many MDTs.
1084          *
1085          * To simplify the operation, OSD will not distinguish
1086          * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
1087          * only happened for the RPC from other MDT during the
1088          * OI scrub, or for the client side RPC with FID only,
1089          * such as FID to path, or from old connected client. */
1090         if (!remote && !fid_is_on_ost(info, dev, fid, OI_CHECK_FLD)) {
1091                 rc1 = osd_lookup_in_remote_parent(info, dev, fid, id);
1092                 if (!rc1) {
1093                         remote = true;
1094                         trusted = true;
1095                         flags |= SS_AUTO_PARTIAL;
1096                         flags &= ~SS_AUTO_FULL;
1097                         goto iget;
1098                 }
1099         }
1100
1101         if (thread_is_running(&scrub->os_thread)) {
1102                 if (scrub->os_partial_scan && !scrub->os_in_join)
1103                         goto join;
1104
1105                 if (IS_ERR_OR_NULL(inode) || result)
1106                         GOTO(out, result = -EINPROGRESS);
1107
1108                 LASSERT(remote);
1109                 LASSERT(obj->oo_inode == inode);
1110
1111                 osd_add_oi_cache(info, dev, id, fid);
1112                 osd_oii_insert(dev, oic, true);
1113                 goto found;
1114         }
1115
1116         if (dev->od_noscrub) {
1117                 if (!remote)
1118                         GOTO(out, result = -EREMCHG);
1119
1120                 LASSERT(!result);
1121                 LASSERT(obj->oo_inode == inode);
1122
1123                 osd_add_oi_cache(info, dev, id, fid);
1124                 goto found;
1125         }
1126
1127 join:
1128         rc1 = osd_scrub_start(dev, flags);
1129         LCONSOLE_WARN("%s: trigger OI scrub by RPC for the " DFID" with flags "
1130                       "0x%x, rc = %d\n", osd_name(dev), PFID(fid), flags, rc1);
1131         if (rc1 && rc1 != -EALREADY)
1132                 GOTO(out, result = -EREMCHG);
1133
1134         if (IS_ERR_OR_NULL(inode) || result)
1135                 GOTO(out, result = -EINPROGRESS);
1136
1137         LASSERT(remote);
1138         LASSERT(obj->oo_inode == inode);
1139
1140         osd_add_oi_cache(info, dev, id, fid);
1141         osd_oii_insert(dev, oic, true);
1142         goto found;
1143
1144 check_lma:
1145         result = osd_check_lma(env, obj);
1146         if (!result)
1147                 goto found;
1148
1149         LASSERTF(id->oii_ino == inode->i_ino &&
1150                  id->oii_gen == inode->i_generation,
1151                  "locate wrong inode for FID: "DFID", %u/%u => %ld/%u\n",
1152                  PFID(fid), id->oii_ino, id->oii_gen,
1153                  inode->i_ino, inode->i_generation);
1154
1155         saved_ino = inode->i_ino;
1156         saved_gen = inode->i_generation;
1157
1158         if (unlikely(result == -ENODATA)) {
1159                 /* If the OI scrub updated the OI mapping by race, it
1160                  * must be valid. Trust the inode that has no LMA EA. */
1161                 if (updated)
1162                         goto found;
1163
1164                 result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1165                 if (!result) {
1166                         /* The OI mapping is still there, the inode is still
1167                          * valid. It is just becaues the inode has no LMA EA. */
1168                         if (saved_ino == id->oii_ino &&
1169                             saved_gen == id->oii_gen)
1170                                 goto found;
1171
1172                         /* It is the OI scrub updated the OI mapping by race.
1173                          * The new OI mapping must be valid. */
1174                         trusted = true;
1175                         updated = true;
1176                         goto iget;
1177                 }
1178
1179                 /* "result == -ENOENT" means that the OI mappinghas been
1180                  * removed by race, so the inode belongs to other object.
1181                  *
1182                  * Others error can be returned  directly. */
1183                 if (result == -ENOENT) {
1184                         LASSERT(trusted);
1185
1186                         obj->oo_inode = NULL;
1187                         result = 0;
1188                 }
1189         }
1190
1191         if (result != -EREMCHG)
1192                 GOTO(out, result);
1193
1194         LASSERT(!updated);
1195
1196         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1197         /* "result == -ENOENT" means the cached OI mapping has been removed
1198          * from the OI file by race, above inode belongs to other object. */
1199         if (result == -ENOENT) {
1200                 LASSERT(trusted);
1201
1202                 obj->oo_inode = NULL;
1203                 GOTO(out, result = 0);
1204         }
1205
1206         if (result)
1207                 GOTO(out, result);
1208
1209         if (saved_ino == id->oii_ino && saved_gen == id->oii_gen) {
1210                 result = -EREMCHG;
1211                 goto trigger;
1212         }
1213
1214         /* It is the OI scrub updated the OI mapping by race.
1215          * The new OI mapping must be valid. */
1216         trusted = true;
1217         updated = true;
1218         goto iget;
1219
1220 found:
1221         obj->oo_compat_dot_created = 1;
1222         obj->oo_compat_dotdot_created = 1;
1223
1224         if (S_ISDIR(inode->i_mode) &&
1225             (flags & SS_AUTO_PARTIAL || sf->sf_status == SS_SCANNING))
1226                 osd_check_lmv(info, dev, inode, oic);
1227
1228         result = osd_attach_jinode(inode);
1229         if (result)
1230                 GOTO(out, result);
1231
1232         if (!ldiskfs_pdo)
1233                 GOTO(out, result = 0);
1234
1235         LASSERT(!obj->oo_hl_head);
1236         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
1237
1238         GOTO(out, result = (!obj->oo_hl_head ? -ENOMEM : 0));
1239
1240 out:
1241         if (result || !obj->oo_inode) {
1242                 if (!IS_ERR_OR_NULL(inode))
1243                         iput(inode);
1244
1245                 obj->oo_inode = NULL;
1246                 if (trusted)
1247                         fid_zero(&oic->oic_fid);
1248         }
1249
1250         LINVRNT(osd_invariant(obj));
1251         return result;
1252 }
1253
1254 /*
1255  * Concurrency: shouldn't matter.
1256  */
1257 static void osd_object_init0(struct osd_object *obj)
1258 {
1259         LASSERT(obj->oo_inode != NULL);
1260         obj->oo_dt.do_body_ops = &osd_body_ops;
1261         obj->oo_dt.do_lu.lo_header->loh_attr |=
1262                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
1263 }
1264
1265 /*
1266  * Concurrency: no concurrent access is possible that early in object
1267  * life-cycle.
1268  */
1269 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
1270                            const struct lu_object_conf *conf)
1271 {
1272         struct osd_object *obj = osd_obj(l);
1273         int result;
1274
1275         LINVRNT(osd_invariant(obj));
1276
1277         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
1278                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
1279                 l->lo_header->loh_attr |= LOHA_EXISTS;
1280                 return 0;
1281         }
1282
1283         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
1284         obj->oo_dt.do_body_ops = &osd_body_ops_new;
1285         if (result == 0 && obj->oo_inode != NULL) {
1286                 struct osd_thread_info *oti = osd_oti_get(env);
1287                 struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
1288
1289                 osd_object_init0(obj);
1290                 result = osd_get_lma(oti, obj->oo_inode,
1291                                      &oti->oti_obj_dentry, loa);
1292                 if (!result) {
1293                         /* Convert LMAI flags to lustre LMA flags
1294                          * and cache it to oo_lma_flags */
1295                         obj->oo_lma_flags =
1296                                 lma_to_lustre_flags(loa->loa_lma.lma_incompat);
1297                 } else if (result == -ENODATA) {
1298                         result = 0;
1299                 }
1300         }
1301
1302         LINVRNT(osd_invariant(obj));
1303         return result;
1304 }
1305
1306 /* The first part of oxe_buf is xattr name, and is '\0' terminated.
1307  * The left part is for value, binary mode. */
1308 struct osd_xattr_entry {
1309         struct list_head        oxe_list;
1310         size_t                  oxe_len;
1311         size_t                  oxe_namelen;
1312         bool                    oxe_exist;
1313         struct rcu_head         oxe_rcu;
1314         char                    oxe_buf[0];
1315 };
1316
1317 static int osd_oxc_get(struct osd_object *obj, const char *name,
1318                        struct lu_buf *buf)
1319 {
1320         struct osd_xattr_entry *tmp;
1321         struct osd_xattr_entry *oxe = NULL;
1322         size_t namelen = strlen(name);
1323         int rc;
1324         ENTRY;
1325
1326         rcu_read_lock();
1327         list_for_each_entry_rcu(tmp, &obj->oo_xattr_list, oxe_list) {
1328                 if (namelen == tmp->oxe_namelen &&
1329                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1330                         oxe = tmp;
1331                         break;
1332                 }
1333         }
1334
1335         if (oxe == NULL)
1336                 GOTO(out, rc = -ENOENT);
1337
1338         if (!oxe->oxe_exist)
1339                 GOTO(out, rc = -ENODATA);
1340
1341         /* vallen */
1342         rc = oxe->oxe_len - sizeof(*oxe) - oxe->oxe_namelen - 1;
1343         LASSERT(rc > 0);
1344
1345         if (buf->lb_buf == NULL)
1346                 GOTO(out, rc);
1347
1348         if (buf->lb_len < rc)
1349                 GOTO(out, rc = -ERANGE);
1350
1351         memcpy(buf->lb_buf, &oxe->oxe_buf[namelen + 1], rc);
1352         EXIT;
1353 out:
1354         rcu_read_unlock();
1355
1356         return rc;
1357 }
1358
1359 static void osd_oxc_free(struct rcu_head *head)
1360 {
1361         struct osd_xattr_entry *oxe;
1362
1363         oxe = container_of(head, struct osd_xattr_entry, oxe_rcu);
1364         OBD_FREE(oxe, oxe->oxe_len);
1365 }
1366
1367 static void osd_oxc_add(struct osd_object *obj, const char *name,
1368                         const char *buf, int buflen)
1369 {
1370         struct osd_xattr_entry *oxe;
1371         struct osd_xattr_entry *old = NULL;
1372         struct osd_xattr_entry *tmp;
1373         size_t namelen = strlen(name);
1374         size_t len = sizeof(*oxe) + namelen + 1 + buflen;
1375
1376         OBD_ALLOC(oxe, len);
1377         if (oxe == NULL)
1378                 return;
1379
1380         INIT_LIST_HEAD(&oxe->oxe_list);
1381         oxe->oxe_len = len;
1382         oxe->oxe_namelen = namelen;
1383         memcpy(oxe->oxe_buf, name, namelen);
1384         if (buflen > 0) {
1385                 LASSERT(buf != NULL);
1386                 memcpy(oxe->oxe_buf + namelen + 1, buf, buflen);
1387                 oxe->oxe_exist = true;
1388         } else {
1389                 oxe->oxe_exist = false;
1390         }
1391
1392         /* this should be rarely called, just remove old and add new */
1393         spin_lock(&obj->oo_guard);
1394         list_for_each_entry(tmp, &obj->oo_xattr_list, oxe_list) {
1395                 if (namelen == tmp->oxe_namelen &&
1396                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1397                         old = tmp;
1398                         break;
1399                 }
1400         }
1401         if (old != NULL) {
1402                 list_replace_rcu(&old->oxe_list, &oxe->oxe_list);
1403                 call_rcu(&old->oxe_rcu, osd_oxc_free);
1404         } else {
1405                 list_add_tail_rcu(&oxe->oxe_list, &obj->oo_xattr_list);
1406         }
1407         spin_unlock(&obj->oo_guard);
1408 }
1409
1410 static void osd_oxc_del(struct osd_object *obj, const char *name)
1411 {
1412         struct osd_xattr_entry *oxe;
1413         size_t namelen = strlen(name);
1414
1415         spin_lock(&obj->oo_guard);
1416         list_for_each_entry(oxe, &obj->oo_xattr_list, oxe_list) {
1417                 if (namelen == oxe->oxe_namelen &&
1418                     strncmp(name, oxe->oxe_buf, namelen) == 0) {
1419                         list_del_rcu(&oxe->oxe_list);
1420                         call_rcu(&oxe->oxe_rcu, osd_oxc_free);
1421                         break;
1422                 }
1423         }
1424         spin_unlock(&obj->oo_guard);
1425 }
1426
1427 static void osd_oxc_fini(struct osd_object *obj)
1428 {
1429         struct osd_xattr_entry *oxe, *next;
1430
1431         list_for_each_entry_safe(oxe, next, &obj->oo_xattr_list, oxe_list) {
1432                 list_del(&oxe->oxe_list);
1433                 OBD_FREE(oxe, oxe->oxe_len);
1434         }
1435 }
1436
1437 /*
1438  * Concurrency: no concurrent access is possible that late in object
1439  * life-cycle.
1440  */
1441 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
1442 {
1443         struct osd_object *obj = osd_obj(l);
1444
1445         LINVRNT(osd_invariant(obj));
1446
1447         osd_oxc_fini(obj);
1448         dt_object_fini(&obj->oo_dt);
1449         if (obj->oo_hl_head != NULL)
1450                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
1451         OBD_FREE_PTR(obj);
1452 }
1453
1454 /*
1455  * Concurrency: no concurrent access is possible that late in object
1456  * life-cycle.
1457  */
1458 static void osd_index_fini(struct osd_object *o)
1459 {
1460         struct iam_container *bag;
1461
1462         if (o->oo_dir != NULL) {
1463                 bag = &o->oo_dir->od_container;
1464                 if (o->oo_inode != NULL) {
1465                         if (bag->ic_object == o->oo_inode)
1466                                 iam_container_fini(bag);
1467                 }
1468                 OBD_FREE_PTR(o->oo_dir);
1469                 o->oo_dir = NULL;
1470         }
1471 }
1472
1473 /*
1474  * Concurrency: no concurrent access is possible that late in object
1475  * life-cycle (for all existing callers, that is. New callers have to provide
1476  * their own locking.)
1477  */
1478 static int osd_inode_unlinked(const struct inode *inode)
1479 {
1480         return inode->i_nlink == 0;
1481 }
1482
1483 enum {
1484         OSD_TXN_OI_DELETE_CREDITS    = 20,
1485         OSD_TXN_INODE_DELETE_CREDITS = 20
1486 };
1487
1488 /*
1489  * Journal
1490  */
1491
1492 #if OSD_THANDLE_STATS
1493 /**
1494  * Set time when the handle is allocated
1495  */
1496 static void osd_th_alloced(struct osd_thandle *oth)
1497 {
1498         oth->oth_alloced = ktime_get();
1499 }
1500
1501 /**
1502  * Set time when the handle started
1503  */
1504 static void osd_th_started(struct osd_thandle *oth)
1505 {
1506         oth->oth_started = ktime_get();
1507 }
1508
1509 /**
1510  * Check whether the we deal with this handle for too long.
1511  */
1512 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
1513                                 ktime_t alloced, ktime_t started,
1514                                 ktime_t closed)
1515 {
1516         ktime_t now = ktime_get();
1517
1518         LASSERT(dev != NULL);
1519
1520         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
1521                             ktime_us_delta(started, alloced));
1522         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
1523                             ktime_us_delta(closed, started));
1524         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
1525                             ktime_us_delta(now, closed));
1526
1527         if (ktime_before(ktime_add_ns(alloced, 30 * NSEC_PER_SEC), now)) {
1528                 CWARN("transaction handle %p was open for too long: now %lld, alloced %lld, started %lld, closed %lld\n",
1529                       oth, now, alloced, started, closed);
1530                 libcfs_debug_dumpstack(NULL);
1531         }
1532 }
1533
1534 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
1535 {                                                                       \
1536         ktime_t __closed = ktime_get();                                 \
1537         ktime_t __alloced = oth->oth_alloced;                           \
1538         ktime_t __started = oth->oth_started;                           \
1539                                                                         \
1540         expr;                                                           \
1541         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
1542 }
1543
1544 #else /* OSD_THANDLE_STATS */
1545
1546 #define osd_th_alloced(h)                  do {} while(0)
1547 #define osd_th_started(h)                  do {} while(0)
1548 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
1549
1550 #endif /* OSD_THANDLE_STATS */
1551
1552 /*
1553  * Concurrency: doesn't access mutable data.
1554  */
1555 static int osd_param_is_not_sane(const struct osd_device *dev,
1556                                  const struct thandle *th)
1557 {
1558         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
1559
1560         return oh->ot_credits > osd_transaction_size(dev);
1561 }
1562
1563 /*
1564  * Concurrency: shouldn't matter.
1565  */
1566 static void osd_trans_commit_cb(struct super_block *sb,
1567                                 struct ldiskfs_journal_cb_entry *jcb, int error)
1568 {
1569         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
1570         struct thandle     *th  = &oh->ot_super;
1571         struct lu_device   *lud = &th->th_dev->dd_lu_dev;
1572         struct dt_txn_commit_cb *dcb, *tmp;
1573
1574         LASSERT(oh->ot_handle == NULL);
1575
1576         if (error)
1577                 CERROR("transaction @0x%p commit error: %d\n", th, error);
1578
1579         dt_txn_hook_commit(th);
1580
1581         /* call per-transaction callbacks if any */
1582         list_for_each_entry_safe(dcb, tmp, &oh->ot_commit_dcb_list,
1583                                  dcb_linkage) {
1584                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
1585                          "commit callback entry: magic=%x name='%s'\n",
1586                          dcb->dcb_magic, dcb->dcb_name);
1587                 list_del_init(&dcb->dcb_linkage);
1588                 dcb->dcb_func(NULL, th, dcb, error);
1589         }
1590
1591         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
1592         lu_device_put(lud);
1593         th->th_dev = NULL;
1594
1595         lu_context_exit(&th->th_ctx);
1596         lu_context_fini(&th->th_ctx);
1597         OBD_FREE_PTR(oh);
1598 }
1599
1600 #ifndef HAVE_SB_START_WRITE
1601 # define sb_start_write(sb) do {} while (0)
1602 # define sb_end_write(sb) do {} while (0)
1603 #endif
1604
1605 static struct thandle *osd_trans_create(const struct lu_env *env,
1606                                         struct dt_device *d)
1607 {
1608         struct osd_thread_info  *oti = osd_oti_get(env);
1609         struct osd_iobuf        *iobuf = &oti->oti_iobuf;
1610         struct osd_thandle      *oh;
1611         struct thandle          *th;
1612         ENTRY;
1613
1614         if (d->dd_rdonly) {
1615                 CERROR("%s: someone try to start transaction under "
1616                        "readonly mode, should be disabled.\n",
1617                        osd_name(osd_dt_dev(d)));
1618                 dump_stack();
1619                 RETURN(ERR_PTR(-EROFS));
1620         }
1621
1622         /* on pending IO in this thread should left from prev. request */
1623         LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
1624
1625         sb_start_write(osd_sb(osd_dt_dev(d)));
1626
1627         OBD_ALLOC_GFP(oh, sizeof *oh, GFP_NOFS);
1628         if (oh != NULL) {
1629                 oh->ot_quota_trans = &oti->oti_quota_trans;
1630                 memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
1631                 th = &oh->ot_super;
1632                 th->th_dev = d;
1633                 th->th_result = 0;
1634                 th->th_tags = LCT_TX_HANDLE;
1635                 oh->ot_credits = 0;
1636                 INIT_LIST_HEAD(&oh->ot_commit_dcb_list);
1637                 INIT_LIST_HEAD(&oh->ot_stop_dcb_list);
1638                 osd_th_alloced(oh);
1639
1640                 memset(oti->oti_declare_ops, 0,
1641                        sizeof(oti->oti_declare_ops));
1642                 memset(oti->oti_declare_ops_cred, 0,
1643                        sizeof(oti->oti_declare_ops_cred));
1644                 memset(oti->oti_declare_ops_used, 0,
1645                        sizeof(oti->oti_declare_ops_used));
1646         } else {
1647                 sb_end_write(osd_sb(osd_dt_dev(d)));
1648                 th = ERR_PTR(-ENOMEM);
1649         }
1650         RETURN(th);
1651 }
1652
1653 void osd_trans_dump_creds(const struct lu_env *env, struct thandle *th)
1654 {
1655         struct osd_thread_info  *oti = osd_oti_get(env);
1656         struct osd_thandle      *oh;
1657
1658         oh = container_of0(th, struct osd_thandle, ot_super);
1659         LASSERT(oh != NULL);
1660
1661         CWARN("  create: %u/%u/%u, destroy: %u/%u/%u\n",
1662               oti->oti_declare_ops[OSD_OT_CREATE],
1663               oti->oti_declare_ops_cred[OSD_OT_CREATE],
1664               oti->oti_declare_ops_used[OSD_OT_CREATE],
1665               oti->oti_declare_ops[OSD_OT_DESTROY],
1666               oti->oti_declare_ops_cred[OSD_OT_DESTROY],
1667               oti->oti_declare_ops_used[OSD_OT_DESTROY]);
1668         CWARN("  attr_set: %u/%u/%u, xattr_set: %u/%u/%u\n",
1669               oti->oti_declare_ops[OSD_OT_ATTR_SET],
1670               oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
1671               oti->oti_declare_ops_used[OSD_OT_ATTR_SET],
1672               oti->oti_declare_ops[OSD_OT_XATTR_SET],
1673               oti->oti_declare_ops_cred[OSD_OT_XATTR_SET],
1674               oti->oti_declare_ops_used[OSD_OT_XATTR_SET]);
1675         CWARN("  write: %u/%u/%u, punch: %u/%u/%u, quota %u/%u/%u\n",
1676               oti->oti_declare_ops[OSD_OT_WRITE],
1677               oti->oti_declare_ops_cred[OSD_OT_WRITE],
1678               oti->oti_declare_ops_used[OSD_OT_WRITE],
1679               oti->oti_declare_ops[OSD_OT_PUNCH],
1680               oti->oti_declare_ops_cred[OSD_OT_PUNCH],
1681               oti->oti_declare_ops_used[OSD_OT_PUNCH],
1682               oti->oti_declare_ops[OSD_OT_QUOTA],
1683               oti->oti_declare_ops_cred[OSD_OT_QUOTA],
1684               oti->oti_declare_ops_used[OSD_OT_QUOTA]);
1685         CWARN("  insert: %u/%u/%u, delete: %u/%u/%u\n",
1686               oti->oti_declare_ops[OSD_OT_INSERT],
1687               oti->oti_declare_ops_cred[OSD_OT_INSERT],
1688               oti->oti_declare_ops_used[OSD_OT_INSERT],
1689               oti->oti_declare_ops[OSD_OT_DELETE],
1690               oti->oti_declare_ops_cred[OSD_OT_DELETE],
1691               oti->oti_declare_ops_used[OSD_OT_DELETE]);
1692         CWARN("  ref_add: %u/%u/%u, ref_del: %u/%u/%u\n",
1693               oti->oti_declare_ops[OSD_OT_REF_ADD],
1694               oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
1695               oti->oti_declare_ops_used[OSD_OT_REF_ADD],
1696               oti->oti_declare_ops[OSD_OT_REF_DEL],
1697               oti->oti_declare_ops_cred[OSD_OT_REF_DEL],
1698               oti->oti_declare_ops_used[OSD_OT_REF_DEL]);
1699 }
1700
1701 /*
1702  * Concurrency: shouldn't matter.
1703  */
1704 static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
1705                            struct thandle *th)
1706 {
1707         struct osd_thread_info *oti = osd_oti_get(env);
1708         struct osd_device  *dev = osd_dt_dev(d);
1709         handle_t           *jh;
1710         struct osd_thandle *oh;
1711         int rc;
1712
1713         ENTRY;
1714
1715         LASSERT(current->journal_info == NULL);
1716
1717         oh = container_of0(th, struct osd_thandle, ot_super);
1718         LASSERT(oh != NULL);
1719         LASSERT(oh->ot_handle == NULL);
1720
1721         rc = dt_txn_hook_start(env, d, th);
1722         if (rc != 0)
1723                 GOTO(out, rc);
1724
1725         if (unlikely(osd_param_is_not_sane(dev, th))) {
1726                 static unsigned long last_printed;
1727                 static int last_credits;
1728
1729                 /* don't make noise on a tiny testing systems
1730                  * actual credits misuse will be caught anyway */
1731                 if (last_credits != oh->ot_credits &&
1732                     time_after(jiffies, last_printed +
1733                                msecs_to_jiffies(60 * MSEC_PER_SEC)) &&
1734                     osd_transaction_size(dev) > 512) {
1735                         CWARN("%s: credits %u > trans_max %u\n", osd_name(dev),
1736                               oh->ot_credits, osd_transaction_size(dev));
1737                         osd_trans_dump_creds(env, th);
1738                         libcfs_debug_dumpstack(NULL);
1739                         last_credits = oh->ot_credits;
1740                         last_printed = jiffies;
1741                 }
1742                 /* XXX Limit the credits to 'max_transaction_buffers', and
1743                  *     let the underlying filesystem to catch the error if
1744                  *     we really need so many credits.
1745                  *
1746                  *     This should be removed when we can calculate the
1747                  *     credits precisely. */
1748                 oh->ot_credits = osd_transaction_size(dev);
1749         } else if (ldiskfs_track_declares_assert != 0) {
1750                 /* reserve few credits to prevent an assertion in JBD
1751                  * our debugging mechanism will be able to detected
1752                  * overuse. this can help to debug single-update
1753                  * transactions */
1754                 oh->ot_credits += 10;
1755                 if (unlikely(osd_param_is_not_sane(dev, th)))
1756                         oh->ot_credits = osd_transaction_size(dev);
1757         }
1758
1759         /*
1760          * XXX temporary stuff. Some abstraction layer should
1761          * be used.
1762          */
1763         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
1764         osd_th_started(oh);
1765         if (!IS_ERR(jh)) {
1766                 oh->ot_handle = jh;
1767                 LASSERT(oti->oti_txns == 0);
1768                 lu_context_init(&th->th_ctx, th->th_tags);
1769                 lu_context_enter(&th->th_ctx);
1770
1771                 lu_device_get(&d->dd_lu_dev);
1772                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
1773                               "osd-tx", th);
1774                 oti->oti_txns++;
1775                 rc = 0;
1776         } else {
1777                 rc = PTR_ERR(jh);
1778         }
1779 out:
1780         RETURN(rc);
1781 }
1782
1783 static int osd_seq_exists(const struct lu_env *env,
1784                           struct osd_device *osd, u64 seq)
1785 {
1786         struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
1787         struct seq_server_site  *ss = osd_seq_site(osd);
1788         int                     rc;
1789         ENTRY;
1790
1791         LASSERT(ss != NULL);
1792         LASSERT(ss->ss_server_fld != NULL);
1793
1794         rc = osd_fld_lookup(env, osd, seq, range);
1795         if (rc != 0) {
1796                 if (rc != -ENOENT)
1797                         CERROR("%s: can't lookup FLD sequence %#llx: rc = %d\n",
1798                                osd_name(osd), seq, rc);
1799                 RETURN(0);
1800         }
1801
1802         RETURN(ss->ss_node_id == range->lsr_index);
1803 }
1804
1805 static void osd_trans_stop_cb(struct osd_thandle *oth, int result)
1806 {
1807         struct dt_txn_commit_cb *dcb;
1808         struct dt_txn_commit_cb *tmp;
1809
1810         /* call per-transaction stop callbacks if any */
1811         list_for_each_entry_safe(dcb, tmp, &oth->ot_stop_dcb_list,
1812                                  dcb_linkage) {
1813                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
1814                          "commit callback entry: magic=%x name='%s'\n",
1815                          dcb->dcb_magic, dcb->dcb_name);
1816                 list_del_init(&dcb->dcb_linkage);
1817                 dcb->dcb_func(NULL, &oth->ot_super, dcb, result);
1818         }
1819 }
1820
1821 /*
1822  * Concurrency: shouldn't matter.
1823  */
1824 static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
1825                           struct thandle *th)
1826 {
1827         int                     rc = 0, remove_agents = 0;
1828         struct osd_thandle     *oh;
1829         struct osd_thread_info *oti = osd_oti_get(env);
1830         struct osd_iobuf       *iobuf = &oti->oti_iobuf;
1831         struct osd_device      *osd = osd_dt_dev(th->th_dev);
1832         struct qsd_instance    *qsd = osd->od_quota_slave;
1833         struct lquota_trans    *qtrans;
1834         ENTRY;
1835
1836         oh = container_of0(th, struct osd_thandle, ot_super);
1837
1838         /* reset OI cache for safety */
1839         oti->oti_ins_cache_used = 0;
1840
1841         remove_agents = oh->ot_remove_agents;
1842
1843         qtrans = oh->ot_quota_trans;
1844         oh->ot_quota_trans = NULL;
1845
1846         if (oh->ot_handle != NULL) {
1847                 int rc2;
1848                 handle_t *hdl = oh->ot_handle;
1849
1850                 /*
1851                  * add commit callback
1852                  * notice we don't do this in osd_trans_start()
1853                  * as underlying transaction can change during truncate
1854                  */
1855                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
1856                                          &oh->ot_jcb);
1857
1858                 LASSERT(oti->oti_txns == 1);
1859                 oti->oti_txns--;
1860
1861                 rc = dt_txn_hook_stop(env, th);
1862                 if (rc != 0)
1863                         CERROR("%s: failed in transaction hook: rc = %d\n",
1864                                osd_name(osd), rc);
1865
1866                 osd_trans_stop_cb(oh, rc);
1867                 /* hook functions might modify th_sync */
1868                 hdl->h_sync = th->th_sync;
1869
1870                 oh->ot_handle = NULL;
1871                 OSD_CHECK_SLOW_TH(oh, osd, rc2 = ldiskfs_journal_stop(hdl));
1872                 if (rc2 != 0)
1873                         CERROR("%s: failed to stop transaction: rc = %d\n",
1874                                osd_name(osd), rc2);
1875                 if (!rc)
1876                         rc = rc2;
1877         } else {
1878                 osd_trans_stop_cb(oh, th->th_result);
1879                 OBD_FREE_PTR(oh);
1880         }
1881
1882         /* inform the quota slave device that the transaction is stopping */
1883         qsd_op_end(env, qsd, qtrans);
1884
1885         /* as we want IO to journal and data IO be concurrent, we don't block
1886          * awaiting data IO completion in osd_do_bio(), instead we wait here
1887          * once transaction is submitted to the journal. all reqular requests
1888          * don't do direct IO (except read/write), thus this wait_event becomes
1889          * no-op for them.
1890          *
1891          * IMPORTANT: we have to wait till any IO submited by the thread is
1892          * completed otherwise iobuf may be corrupted by different request
1893          */
1894         wait_event(iobuf->dr_wait,
1895                        atomic_read(&iobuf->dr_numreqs) == 0);
1896         osd_fini_iobuf(osd, iobuf);
1897         if (!rc)
1898                 rc = iobuf->dr_error;
1899
1900         if (unlikely(remove_agents != 0))
1901                 osd_process_scheduled_agent_removals(env, osd);
1902
1903         sb_end_write(osd_sb(osd));
1904
1905         RETURN(rc);
1906 }
1907
1908 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
1909 {
1910         struct osd_thandle *oh = container_of0(th, struct osd_thandle,
1911                                                ot_super);
1912
1913         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
1914         LASSERT(&dcb->dcb_func != NULL);
1915         if (dcb->dcb_flags & DCB_TRANS_STOP)
1916                 list_add(&dcb->dcb_linkage, &oh->ot_stop_dcb_list);
1917         else
1918                 list_add(&dcb->dcb_linkage, &oh->ot_commit_dcb_list);
1919
1920         return 0;
1921 }
1922
1923 /*
1924  * Called just before object is freed. Releases all resources except for
1925  * object itself (that is released by osd_object_free()).
1926  *
1927  * Concurrency: no concurrent access is possible that late in object
1928  * life-cycle.
1929  */
1930 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
1931 {
1932         struct osd_object *obj   = osd_obj(l);
1933         struct inode      *inode = obj->oo_inode;
1934
1935         LINVRNT(osd_invariant(obj));
1936
1937         /*
1938          * If object is unlinked remove fid->ino mapping from object index.
1939          */
1940
1941         osd_index_fini(obj);
1942         if (inode != NULL) {
1943                 struct qsd_instance     *qsd = osd_obj2dev(obj)->od_quota_slave;
1944                 qid_t                    uid = i_uid_read(inode);
1945                 qid_t                    gid = i_gid_read(inode);
1946
1947                 iput(inode);
1948                 obj->oo_inode = NULL;
1949
1950                 if (qsd != NULL) {
1951                         struct osd_thread_info  *info = osd_oti_get(env);
1952                         struct lquota_id_info   *qi = &info->oti_qi;
1953
1954                         /* Release granted quota to master if necessary */
1955                         qi->lqi_id.qid_uid = uid;
1956                         qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
1957
1958                         qi->lqi_id.qid_uid = gid;
1959                         qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
1960
1961                         qi->lqi_id.qid_uid = i_projid_read(inode);
1962                         qsd_op_adjust(env, qsd, &qi->lqi_id, PRJQUOTA);
1963                 }
1964         }
1965 }
1966
1967 /*
1968  * Concurrency: ->loo_object_release() is called under site spin-lock.
1969  */
1970 static void osd_object_release(const struct lu_env *env,
1971                                struct lu_object *l)
1972 {
1973         struct osd_object *o = osd_obj(l);
1974         /* nobody should be releasing a non-destroyed object with nlink=0
1975          * the API allows this, but ldiskfs doesn't like and then report
1976          * this inode as deleted */
1977         if (unlikely(!o->oo_destroyed && o->oo_inode && o->oo_inode->i_nlink == 0))
1978                 LBUG();
1979 }
1980
1981 /*
1982  * Concurrency: shouldn't matter.
1983  */
1984 static int osd_object_print(const struct lu_env *env, void *cookie,
1985                             lu_printer_t p, const struct lu_object *l)
1986 {
1987         struct osd_object *o = osd_obj(l);
1988         struct iam_descr  *d;
1989
1990         if (o->oo_dir != NULL)
1991                 d = o->oo_dir->od_container.ic_descr;
1992         else
1993                 d = NULL;
1994         return (*p)(env, cookie,
1995                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
1996                     o, o->oo_inode,
1997                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
1998                     o->oo_inode ? o->oo_inode->i_generation : 0,
1999                     d ? d->id_ops->id_name : "plain");
2000 }
2001
2002 /*
2003  * Concurrency: shouldn't matter.
2004  */
2005 int osd_statfs(const struct lu_env *env, struct dt_device *d,
2006                struct obd_statfs *sfs)
2007 {
2008         struct osd_device       *osd = osd_dt_dev(d);
2009         struct super_block      *sb = osd_sb(osd);
2010         struct kstatfs          *ksfs;
2011         __u64                    reserved;
2012         int                      result = 0;
2013
2014         if (unlikely(osd->od_mnt == NULL))
2015                 return -EINPROGRESS;
2016
2017         /* osd_lproc.c call this without env, allocate ksfs for that case */
2018         if (unlikely(env == NULL)) {
2019                 OBD_ALLOC_PTR(ksfs);
2020                 if (ksfs == NULL)
2021                         return -ENOMEM;
2022         } else {
2023                 ksfs = &osd_oti_get(env)->oti_ksfs;
2024         }
2025
2026         result = sb->s_op->statfs(sb->s_root, ksfs);
2027         if (result)
2028                 goto out;
2029
2030         statfs_pack(sfs, ksfs);
2031         if (unlikely(sb->s_flags & MS_RDONLY))
2032                 sfs->os_state |= OS_STATE_READONLY;
2033         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb,
2034                                          LDISKFS_FEATURE_INCOMPAT_EXTENTS))
2035                 sfs->os_maxbytes = sb->s_maxbytes;
2036         else
2037                 sfs->os_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2038
2039         /*
2040          * Reserve some space so to avoid fragmenting the filesystem too much.
2041          * Fragmentation not only impacts performance, but can also increase
2042          * metadata overhead significantly, causing grant calculation to be
2043          * wrong.
2044          *
2045          * Reserve 0.78% of total space, at least 8MB for small filesystems.
2046          */
2047         CLASSERT(OSD_STATFS_RESERVED > LDISKFS_MAX_BLOCK_SIZE);
2048         reserved = OSD_STATFS_RESERVED >> sb->s_blocksize_bits;
2049         if (likely(sfs->os_blocks >= reserved << OSD_STATFS_RESERVED_SHIFT))
2050                 reserved = sfs->os_blocks >> OSD_STATFS_RESERVED_SHIFT;
2051
2052         sfs->os_blocks -= reserved;
2053         sfs->os_bfree  -= min(reserved, sfs->os_bfree);
2054         sfs->os_bavail -= min(reserved, sfs->os_bavail);
2055
2056 out:
2057         if (unlikely(env == NULL))
2058                 OBD_FREE_PTR(ksfs);
2059         return result;
2060 }
2061
2062 /**
2063  * Estimate space needed for file creations. We assume the largest filename
2064  * which is 2^64 - 1, hence a filename of 20 chars.
2065  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
2066  */
2067 #ifdef __LDISKFS_DIR_REC_LEN
2068 #define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
2069 #else
2070 #define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
2071 #endif
2072
2073 /*
2074  * Concurrency: doesn't access mutable data.
2075  */
2076 static void osd_conf_get(const struct lu_env *env,
2077                          const struct dt_device *dev,
2078                          struct dt_device_param *param)
2079 {
2080         struct super_block *sb = osd_sb(osd_dt_dev(dev));
2081         int                ea_overhead;
2082
2083         /*
2084          * XXX should be taken from not-yet-existing fs abstraction layer.
2085          */
2086         param->ddp_max_name_len = LDISKFS_NAME_LEN;
2087         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
2088         param->ddp_symlink_max  = sb->s_blocksize;
2089         param->ddp_mount_type     = LDD_MT_LDISKFS;
2090         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EXTENTS))
2091                 param->ddp_maxbytes = sb->s_maxbytes;
2092         else
2093                 param->ddp_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2094         /* inode are statically allocated, so per-inode space consumption
2095          * is the space consumed by the directory entry */
2096         param->ddp_inodespace     = PER_OBJ_USAGE;
2097         /* EXT_INIT_MAX_LEN is the theoretical maximum extent size  (32k blocks
2098          * = 128MB) which is unlikely to be hit in real life. Report a smaller
2099          * maximum length to not under count the actual number of extents
2100          * needed for writing a file. */
2101         param->ddp_max_extent_blks = EXT_INIT_MAX_LEN >> 2;
2102         /* worst-case extent insertion metadata overhead */
2103         param->ddp_extent_tax = 6 * LDISKFS_BLOCK_SIZE(sb);
2104         param->ddp_mntopts      = 0;
2105         if (test_opt(sb, XATTR_USER))
2106                 param->ddp_mntopts |= MNTOPT_USERXATTR;
2107         if (test_opt(sb, POSIX_ACL))
2108                 param->ddp_mntopts |= MNTOPT_ACL;
2109
2110         /* LOD might calculate the max stripe count based on max_ea_size,
2111          * so we need take account in the overhead as well,
2112          * xattr_header + magic + xattr_entry_head */
2113         ea_overhead = sizeof(struct ldiskfs_xattr_header) + sizeof(__u32) +
2114                       LDISKFS_XATTR_LEN(XATTR_NAME_MAX_LEN);
2115
2116 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
2117         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EA_INODE))
2118                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE -
2119                                                                 ea_overhead;
2120         else
2121 #endif
2122                 param->ddp_max_ea_size = sb->s_blocksize - ea_overhead;
2123 }
2124
2125 /*
2126  * Concurrency: shouldn't matter.
2127  */
2128 static int osd_sync(const struct lu_env *env, struct dt_device *d)
2129 {
2130         int rc;
2131
2132         CDEBUG(D_CACHE, "%s: syncing OSD\n", osd_dt_dev(d)->od_svname);
2133
2134         rc = ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
2135
2136         CDEBUG(D_CACHE, "%s: synced OSD: rc = %d\n", osd_dt_dev(d)->od_svname,
2137                rc);
2138
2139         return rc;
2140 }
2141
2142 /**
2143  * Start commit for OSD device.
2144  *
2145  * An implementation of dt_commit_async method for OSD device.
2146  * Asychronously starts underlayng fs sync and thereby a transaction
2147  * commit.
2148  *
2149  * \param env environment
2150  * \param d dt device
2151  *
2152  * \see dt_device_operations
2153  */
2154 static int osd_commit_async(const struct lu_env *env,
2155                             struct dt_device *d)
2156 {
2157         struct super_block *s = osd_sb(osd_dt_dev(d));
2158         ENTRY;
2159
2160         CDEBUG(D_HA, "%s: async commit OSD\n", osd_dt_dev(d)->od_svname);
2161         RETURN(s->s_op->sync_fs(s, 0));
2162 }
2163
2164 /* Our own copy of the set readonly functions if present, or NU if not. */
2165 static int (*priv_dev_set_rdonly)(struct block_device *bdev);
2166 static int (*priv_dev_check_rdonly)(struct block_device *bdev);
2167 /* static int (*priv_dev_clear_rdonly)(struct block_device *bdev); */
2168
2169 /*
2170  * Concurrency: shouldn't matter.
2171  */
2172 static int osd_ro(const struct lu_env *env, struct dt_device *d)
2173 {
2174         struct super_block *sb = osd_sb(osd_dt_dev(d));
2175         struct block_device *dev = sb->s_bdev;
2176         int rc = -EOPNOTSUPP;
2177         ENTRY;
2178
2179         if (priv_dev_set_rdonly) {
2180                 struct block_device *jdev = LDISKFS_SB(sb)->journal_bdev;
2181
2182                 rc = 0;
2183                 CERROR("*** setting %s read-only ***\n",
2184                        osd_dt_dev(d)->od_svname);
2185
2186                 if (sb->s_op->freeze_fs) {
2187                         rc = sb->s_op->freeze_fs(sb);
2188                         if (rc)
2189                                 goto out;
2190                 }
2191
2192                 if (jdev && (jdev != dev)) {
2193                         CDEBUG(D_IOCTL | D_HA, "set journal dev %lx rdonly\n",
2194                                (long)jdev);
2195                         priv_dev_set_rdonly(jdev);
2196                 }
2197                 CDEBUG(D_IOCTL | D_HA, "set dev %lx rdonly\n", (long)dev);
2198                 priv_dev_set_rdonly(dev);
2199
2200                 if (sb->s_op->unfreeze_fs)
2201                         sb->s_op->unfreeze_fs(sb);
2202         }
2203
2204 out:
2205         if (rc)
2206                 CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
2207                        osd_dt_dev(d)->od_svname, (long)dev, rc);
2208
2209         RETURN(rc);
2210 }
2211
2212 /**
2213  * Note: we do not count into QUOTA here.
2214  * If we mount with --data_journal we may need more.
2215  */
2216 const int osd_dto_credits_noquota[DTO_NR] = {
2217         /**
2218          * Insert.
2219          * INDEX_EXTRA_TRANS_BLOCKS(8) +
2220          * SINGLEDATA_TRANS_BLOCKS(8)
2221          * XXX Note: maybe iam need more, since iam have more level than
2222          *           EXT3 htree.
2223          */
2224         [DTO_INDEX_INSERT]  = 16,
2225         /**
2226          * Delete
2227          * just modify a single entry, probably merge few within a block
2228          */
2229         [DTO_INDEX_DELETE]  = 1,
2230         /**
2231          * Used for OI scrub
2232          */
2233         [DTO_INDEX_UPDATE]  = 16,
2234         /**
2235          * 4(inode, inode bits, groups, GDT)
2236          *   notice: OI updates are counted separately with DTO_INDEX_INSERT
2237          */
2238         [DTO_OBJECT_CREATE] = 4,
2239         /**
2240          * 4(inode, inode bits, groups, GDT)
2241          *   notice: OI updates are counted separately with DTO_INDEX_DELETE
2242          */
2243         [DTO_OBJECT_DELETE] = 4,
2244         /**
2245          * Attr set credits (inode)
2246          */
2247         [DTO_ATTR_SET_BASE] = 1,
2248         /**
2249          * Xattr set. The same as xattr of EXT3.
2250          * DATA_TRANS_BLOCKS(14)
2251          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
2252          * are also counted in. Do not know why?
2253          */
2254         [DTO_XATTR_SET]     = 14,
2255         /**
2256          * credits for inode change during write.
2257          */
2258         [DTO_WRITE_BASE]    = 3,
2259         /**
2260          * credits for single block write.
2261          */
2262         [DTO_WRITE_BLOCK]   = 14,
2263         /**
2264          * Attr set credits for chown.
2265          * This is extra credits for setattr, and it is null without quota
2266          */
2267         [DTO_ATTR_SET_CHOWN] = 0
2268 };
2269
2270 static const struct dt_device_operations osd_dt_ops = {
2271         .dt_root_get       = osd_root_get,
2272         .dt_statfs         = osd_statfs,
2273         .dt_trans_create   = osd_trans_create,
2274         .dt_trans_start    = osd_trans_start,
2275         .dt_trans_stop     = osd_trans_stop,
2276         .dt_trans_cb_add   = osd_trans_cb_add,
2277         .dt_conf_get       = osd_conf_get,
2278         .dt_sync           = osd_sync,
2279         .dt_ro             = osd_ro,
2280         .dt_commit_async   = osd_commit_async,
2281 };
2282
2283 static void osd_read_lock(const struct lu_env *env, struct dt_object *dt,
2284                           unsigned role)
2285 {
2286         struct osd_object *obj = osd_dt_obj(dt);
2287         struct osd_thread_info *oti = osd_oti_get(env);
2288
2289         LINVRNT(osd_invariant(obj));
2290
2291         LASSERT(obj->oo_owner != env);
2292         down_read_nested(&obj->oo_sem, role);
2293
2294         LASSERT(obj->oo_owner == NULL);
2295         oti->oti_r_locks++;
2296 }
2297
2298 static void osd_write_lock(const struct lu_env *env, struct dt_object *dt,
2299                            unsigned role)
2300 {
2301         struct osd_object *obj = osd_dt_obj(dt);
2302         struct osd_thread_info *oti = osd_oti_get(env);
2303
2304         LINVRNT(osd_invariant(obj));
2305
2306         LASSERT(obj->oo_owner != env);
2307         down_write_nested(&obj->oo_sem, role);
2308
2309         LASSERT(obj->oo_owner == NULL);
2310         obj->oo_owner = env;
2311         oti->oti_w_locks++;
2312 }
2313
2314 static void osd_read_unlock(const struct lu_env *env, struct dt_object *dt)
2315 {
2316         struct osd_object *obj = osd_dt_obj(dt);
2317         struct osd_thread_info *oti = osd_oti_get(env);
2318
2319         LINVRNT(osd_invariant(obj));
2320
2321         LASSERT(oti->oti_r_locks > 0);
2322         oti->oti_r_locks--;
2323         up_read(&obj->oo_sem);
2324 }
2325
2326 static void osd_write_unlock(const struct lu_env *env, struct dt_object *dt)
2327 {
2328         struct osd_object *obj = osd_dt_obj(dt);
2329         struct osd_thread_info *oti = osd_oti_get(env);
2330
2331         LINVRNT(osd_invariant(obj));
2332
2333         LASSERT(obj->oo_owner == env);
2334         LASSERT(oti->oti_w_locks > 0);
2335         oti->oti_w_locks--;
2336         obj->oo_owner = NULL;
2337         up_write(&obj->oo_sem);
2338 }
2339
2340 static int osd_write_locked(const struct lu_env *env, struct dt_object *dt)
2341 {
2342         struct osd_object *obj = osd_dt_obj(dt);
2343
2344         LINVRNT(osd_invariant(obj));
2345
2346         return obj->oo_owner == env;
2347 }
2348
2349 static struct timespec *osd_inode_time(const struct lu_env *env,
2350                                        struct inode *inode, __u64 seconds)
2351 {
2352         struct osd_thread_info  *oti = osd_oti_get(env);
2353         struct timespec         *t   = &oti->oti_time;
2354
2355         t->tv_sec = seconds;
2356         t->tv_nsec = 0;
2357         *t = timespec_trunc(*t, inode->i_sb->s_time_gran);
2358         return t;
2359 }
2360
2361 static void osd_inode_getattr(const struct lu_env *env,
2362                               struct inode *inode, struct lu_attr *attr)
2363 {
2364         attr->la_valid  |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
2365                            LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
2366                            LA_PROJID | LA_FLAGS | LA_NLINK | LA_RDEV |
2367                            LA_BLKSIZE | LA_TYPE;
2368
2369         attr->la_atime   = LTIME_S(inode->i_atime);
2370         attr->la_mtime   = LTIME_S(inode->i_mtime);
2371         attr->la_ctime   = LTIME_S(inode->i_ctime);
2372         attr->la_mode    = inode->i_mode;
2373         attr->la_size    = i_size_read(inode);
2374         attr->la_blocks  = inode->i_blocks;
2375         attr->la_uid     = i_uid_read(inode);
2376         attr->la_gid     = i_gid_read(inode);
2377         attr->la_projid  = i_projid_read(inode);
2378         attr->la_flags   = ll_inode_to_ext_flags(inode->i_flags);
2379         attr->la_nlink   = inode->i_nlink;
2380         attr->la_rdev    = inode->i_rdev;
2381         attr->la_blksize = 1 << inode->i_blkbits;
2382         attr->la_blkbits = inode->i_blkbits;
2383         /*
2384          * Ext4 did not transfer inherit flags from raw inode
2385          * to inode flags, and ext4 internally test raw inode
2386          * @i_flags directly. Instead of patching ext4, we do it here.
2387          */
2388         if (LDISKFS_I(inode)->i_flags & LUSTRE_PROJINHERIT_FL)
2389                 attr->la_flags |= LUSTRE_PROJINHERIT_FL;
2390 }
2391
2392 static int osd_attr_get(const struct lu_env *env,
2393                         struct dt_object *dt,
2394                         struct lu_attr *attr)
2395 {
2396         struct osd_object *obj = osd_dt_obj(dt);
2397
2398         if (unlikely(!dt_object_exists(dt)))
2399                 return -ENOENT;
2400         if (unlikely(obj->oo_destroyed))
2401                 return -ENOENT;
2402
2403         LASSERT(!dt_object_remote(dt));
2404         LINVRNT(osd_invariant(obj));
2405
2406         spin_lock(&obj->oo_guard);
2407         osd_inode_getattr(env, obj->oo_inode, attr);
2408         if (obj->oo_lma_flags & LUSTRE_ORPHAN_FL)
2409                 attr->la_flags |= LUSTRE_ORPHAN_FL;
2410         spin_unlock(&obj->oo_guard);
2411
2412         return 0;
2413 }
2414
2415 static int osd_declare_attr_qid(const struct lu_env *env,
2416                                 struct osd_object *obj,
2417                                 struct osd_thandle *oh, long long bspace,
2418                                 qid_t old_id, qid_t new_id, bool enforce,
2419                                 unsigned type)
2420 {
2421         int rc;
2422         struct osd_thread_info *info = osd_oti_get(env);
2423         struct lquota_id_info  *qi = &info->oti_qi;
2424
2425         qi->lqi_type = type;
2426         /* inode accounting */
2427         qi->lqi_is_blk = false;
2428
2429         /* one more inode for the new id ... */
2430         qi->lqi_id.qid_uid = new_id;
2431         qi->lqi_space      = 1;
2432         /* Reserve credits for the new id */
2433         rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
2434         if (rc == -EDQUOT || rc == -EINPROGRESS)
2435                 rc = 0;
2436         if (rc)
2437                 RETURN(rc);
2438
2439         /* and one less inode for the current id */
2440         qi->lqi_id.qid_uid = old_id;
2441         qi->lqi_space      = -1;
2442         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2443         if (rc == -EDQUOT || rc == -EINPROGRESS)
2444                 rc = 0;
2445         if (rc)
2446                 RETURN(rc);
2447
2448         /* block accounting */
2449         qi->lqi_is_blk = true;
2450
2451         /* more blocks for the new id ... */
2452         qi->lqi_id.qid_uid = new_id;
2453         qi->lqi_space      = bspace;
2454         /*
2455          * Credits for the new uid has been reserved, re-use "obj"
2456          * to save credit reservation.
2457          */
2458         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2459         if (rc == -EDQUOT || rc == -EINPROGRESS)
2460                 rc = 0;
2461         if (rc)
2462                 RETURN(rc);
2463
2464         /* and finally less blocks for the current uid */
2465         qi->lqi_id.qid_uid = old_id;
2466         qi->lqi_space      = -bspace;
2467         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2468         if (rc == -EDQUOT || rc == -EINPROGRESS)
2469                 rc = 0;
2470
2471         RETURN(rc);
2472 }
2473
2474 static int osd_declare_attr_set(const struct lu_env *env,
2475                                 struct dt_object *dt,
2476                                 const struct lu_attr *attr,
2477                                 struct thandle *handle)
2478 {
2479         struct osd_thandle     *oh;
2480         struct osd_object      *obj;
2481         qid_t                   uid;
2482         qid_t                   gid;
2483         long long               bspace;
2484         int                     rc = 0;
2485         bool                    enforce;
2486         ENTRY;
2487
2488         LASSERT(dt != NULL);
2489         LASSERT(handle != NULL);
2490
2491         obj = osd_dt_obj(dt);
2492         LASSERT(osd_invariant(obj));
2493
2494         oh = container_of0(handle, struct osd_thandle, ot_super);
2495         LASSERT(oh->ot_handle == NULL);
2496
2497         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
2498                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2499
2500         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
2501                              osd_dto_credits_noquota[DTO_XATTR_SET]);
2502
2503         if (attr == NULL || obj->oo_inode == NULL)
2504                 RETURN(rc);
2505
2506         bspace   = obj->oo_inode->i_blocks;
2507         bspace <<= obj->oo_inode->i_sb->s_blocksize_bits;
2508         bspace   = toqb(bspace);
2509
2510         /* Changing ownership is always preformed by super user, it should not
2511          * fail with EDQUOT.
2512          *
2513          * We still need to call the osd_declare_qid() to calculate the journal
2514          * credits for updating quota accounting files and to trigger quota
2515          * space adjustment once the operation is completed.*/
2516         if (attr->la_valid & LA_UID || attr->la_valid & LA_GID) {
2517                 /* USERQUOTA */
2518                 uid = i_uid_read(obj->oo_inode);
2519                 enforce = (attr->la_valid & LA_UID) && (attr->la_uid != uid);
2520                 rc = osd_declare_attr_qid(env, obj, oh, bspace, uid,
2521                                           attr->la_uid, enforce, USRQUOTA);
2522                 if (rc)
2523                         RETURN(rc);
2524
2525                 gid = i_gid_read(obj->oo_inode);
2526                 enforce = (attr->la_valid & LA_GID) && (attr->la_gid != gid);
2527                 rc = osd_declare_attr_qid(env, obj, oh, bspace,
2528                                           i_gid_read(obj->oo_inode),
2529                                           attr->la_gid, enforce, GRPQUOTA);
2530                 if (rc)
2531                         RETURN(rc);
2532
2533         }
2534 #ifdef HAVE_PROJECT_QUOTA
2535         if (attr->la_valid & LA_PROJID) {
2536                 __u32 projid = i_projid_read(obj->oo_inode);
2537                 enforce = (attr->la_valid & LA_PROJID) &&
2538                                         (attr->la_projid != projid);
2539                 rc = osd_declare_attr_qid(env, obj, oh, bspace,
2540                                           (qid_t)projid, (qid_t)attr->la_projid,
2541                                           enforce, PRJQUOTA);
2542                 if (rc)
2543                         RETURN(rc);
2544         }
2545 #endif
2546         RETURN(rc);
2547 }
2548
2549 static int osd_inode_setattr(const struct lu_env *env,
2550                              struct inode *inode, const struct lu_attr *attr)
2551 {
2552         __u64 bits = attr->la_valid;
2553
2554         /* Only allow set size for regular file */
2555         if (!S_ISREG(inode->i_mode))
2556                 bits &= ~(LA_SIZE | LA_BLOCKS);
2557
2558         if (bits == 0)
2559                 return 0;
2560
2561         if (bits & LA_ATIME)
2562                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
2563         if (bits & LA_CTIME)
2564                 inode->i_ctime  = *osd_inode_time(env, inode, attr->la_ctime);
2565         if (bits & LA_MTIME)
2566                 inode->i_mtime  = *osd_inode_time(env, inode, attr->la_mtime);
2567         if (bits & LA_SIZE) {
2568                 spin_lock(&inode->i_lock);
2569                 LDISKFS_I(inode)->i_disksize = attr->la_size;
2570                 i_size_write(inode, attr->la_size);
2571                 spin_unlock(&inode->i_lock);
2572         }
2573
2574         /* OSD should not change "i_blocks" which is used by quota.
2575          * "i_blocks" should be changed by ldiskfs only. */
2576         if (bits & LA_MODE)
2577                 inode->i_mode = (inode->i_mode & S_IFMT) |
2578                                 (attr->la_mode & ~S_IFMT);
2579         if (bits & LA_UID)
2580                 i_uid_write(inode, attr->la_uid);
2581         if (bits & LA_GID)
2582                 i_gid_write(inode, attr->la_gid);
2583         if (bits & LA_PROJID)
2584                 i_projid_write(inode, attr->la_projid);
2585         if (bits & LA_NLINK)
2586                 set_nlink(inode, attr->la_nlink);
2587         if (bits & LA_RDEV)
2588                 inode->i_rdev = attr->la_rdev;
2589
2590         if (bits & LA_FLAGS) {
2591                 /* always keep S_NOCMTIME */
2592                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
2593                                  S_NOCMTIME;
2594                 /*
2595                  * Ext4 did not transfer inherit flags from
2596                  * @inode->i_flags to raw inode i_flags when writing
2597                  * flags, we do it explictly here.
2598                  */
2599                 if (attr->la_flags & LUSTRE_PROJINHERIT_FL)
2600                         LDISKFS_I(inode)->i_flags |= LUSTRE_PROJINHERIT_FL;
2601         }
2602         return 0;
2603 }
2604
2605 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr)
2606 {
2607         int rc;
2608
2609         if ((attr->la_valid & LA_UID && attr->la_uid != i_uid_read(inode)) ||
2610             (attr->la_valid & LA_GID && attr->la_gid != i_gid_read(inode))) {
2611                 struct iattr    iattr;
2612
2613                 ll_vfs_dq_init(inode);
2614                 iattr.ia_valid = 0;
2615                 if (attr->la_valid & LA_UID)
2616                         iattr.ia_valid |= ATTR_UID;
2617                 if (attr->la_valid & LA_GID)
2618                         iattr.ia_valid |= ATTR_GID;
2619                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
2620                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
2621
2622                 rc = ll_vfs_dq_transfer(inode, &iattr);
2623                 if (rc) {
2624                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
2625                                "enforcement enabled on the ldiskfs "
2626                                "filesystem?\n", inode->i_sb->s_id, rc);
2627                         return rc;
2628                 }
2629         }
2630
2631 #ifdef HAVE_PROJECT_QUOTA
2632         /* Handle project id transfer here properly */
2633         if (attr->la_valid & LA_PROJID &&
2634             attr->la_projid != i_projid_read(inode)) {
2635                 rc = __ldiskfs_ioctl_setproject(inode, attr->la_projid);
2636                 if (rc) {
2637                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
2638                                "enforcement enabled on the ldiskfs "
2639                                "filesystem?\n", inode->i_sb->s_id, rc);
2640                         return rc;
2641                 }
2642         }
2643 #endif
2644         return 0;
2645 }
2646
2647 static int osd_attr_set(const struct lu_env *env,
2648                         struct dt_object *dt,
2649                         const struct lu_attr *attr,
2650                         struct thandle *handle)
2651 {
2652         struct osd_object *obj = osd_dt_obj(dt);
2653         struct inode      *inode;
2654         int rc;
2655
2656         if (!dt_object_exists(dt))
2657                 return -ENOENT;
2658
2659         LASSERT(handle != NULL);
2660         LASSERT(!dt_object_remote(dt));
2661         LASSERT(osd_invariant(obj));
2662
2663         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
2664
2665         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING)) {
2666                 struct osd_thread_info  *oti  = osd_oti_get(env);
2667                 const struct lu_fid     *fid0 = lu_object_fid(&dt->do_lu);
2668                 struct lu_fid           *fid1 = &oti->oti_fid;
2669                 struct osd_inode_id     *id   = &oti->oti_id;
2670                 struct iam_path_descr   *ipd;
2671                 struct iam_container    *bag;
2672                 struct osd_thandle      *oh;
2673                 int                      rc;
2674
2675                 fid_cpu_to_be(fid1, fid0);
2676                 memset(id, 1, sizeof(*id));
2677                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
2678                                   fid0)->oi_dir.od_container;
2679                 ipd = osd_idx_ipd_get(env, bag);
2680                 if (unlikely(ipd == NULL))
2681                         RETURN(-ENOMEM);
2682
2683                 oh = container_of0(handle, struct osd_thandle, ot_super);
2684                 rc = iam_update(oh->ot_handle, bag, (const struct iam_key *)fid1,
2685                                 (const struct iam_rec *)id, ipd);
2686                 osd_ipd_put(env, bag, ipd);
2687                 return(rc > 0 ? 0 : rc);
2688         }
2689
2690         inode = obj->oo_inode;
2691
2692         rc = osd_quota_transfer(inode, attr);
2693         if (rc)
2694                 return rc;
2695
2696         spin_lock(&obj->oo_guard);
2697         rc = osd_inode_setattr(env, inode, attr);
2698         spin_unlock(&obj->oo_guard);
2699         if (rc != 0)
2700                 GOTO(out, rc);
2701
2702         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2703
2704         if (!(attr->la_valid & LA_FLAGS))
2705                 GOTO(out, rc);
2706
2707         /* Let's check if there are extra flags need to be set into LMA */
2708         if (attr->la_flags & LUSTRE_LMA_FL_MASKS) {
2709                 struct osd_thread_info *info = osd_oti_get(env);
2710                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
2711
2712                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
2713                                  &info->oti_ost_attrs);
2714                 if (rc)
2715                         GOTO(out, rc);
2716
2717                 lma->lma_incompat |=
2718                         lustre_to_lma_flags(attr->la_flags);
2719                 lustre_lma_swab(lma);
2720                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA,
2721                                      lma, sizeof(*lma), XATTR_REPLACE);
2722                 if (rc != 0) {
2723                         struct osd_device *osd = osd_obj2dev(obj);
2724
2725                         CWARN("%s: set "DFID" lma flags %u failed: rc = %d\n",
2726                               osd_name(osd), PFID(lu_object_fid(&dt->do_lu)),
2727                               lma->lma_incompat, rc);
2728                 } else {
2729                         obj->oo_lma_flags =
2730                                 attr->la_flags & LUSTRE_LMA_FL_MASKS;
2731                 }
2732                 osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
2733         }
2734 out:
2735         osd_trans_exec_check(env, handle, OSD_OT_ATTR_SET);
2736
2737         return rc;
2738 }
2739
2740 static struct dentry *osd_child_dentry_get(const struct lu_env *env,
2741                                            struct osd_object *obj,
2742                                            const char *name, const int namelen)
2743 {
2744         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
2745 }
2746
2747 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
2748                       umode_t mode, struct dt_allocation_hint *hint,
2749                       struct thandle *th)
2750 {
2751         int result;
2752         struct osd_device  *osd = osd_obj2dev(obj);
2753         struct osd_thandle *oth;
2754         struct dt_object   *parent = NULL;
2755         struct inode       *inode;
2756
2757         LINVRNT(osd_invariant(obj));
2758         LASSERT(obj->oo_inode == NULL);
2759         LASSERT(obj->oo_hl_head == NULL);
2760
2761         if (S_ISDIR(mode) && ldiskfs_pdo) {
2762                 obj->oo_hl_head =ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
2763                 if (obj->oo_hl_head == NULL)
2764                         return -ENOMEM;
2765         }
2766
2767         oth = container_of(th, struct osd_thandle, ot_super);
2768         LASSERT(oth->ot_handle->h_transaction != NULL);
2769
2770         if (hint != NULL && hint->dah_parent != NULL &&
2771             !dt_object_remote(hint->dah_parent))
2772                 parent = hint->dah_parent;
2773
2774         inode = ldiskfs_create_inode(oth->ot_handle,
2775                                      parent ? osd_dt_obj(parent)->oo_inode :
2776                                               osd_sb(osd)->s_root->d_inode,
2777                                      mode);
2778         if (!IS_ERR(inode)) {
2779                 /* Do not update file c/mtime in ldiskfs. */
2780                 inode->i_flags |= S_NOCMTIME;
2781
2782                 /* For new created object, it must be consistent,
2783                  * and it is unnecessary to scrub against it. */
2784                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
2785
2786                 obj->oo_inode = inode;
2787                 result = 0;
2788         } else {
2789                 if (obj->oo_hl_head != NULL) {
2790                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
2791                         obj->oo_hl_head = NULL;
2792                 }
2793                 result = PTR_ERR(inode);
2794         }
2795         LINVRNT(osd_invariant(obj));
2796         return result;
2797 }
2798
2799 enum {
2800         OSD_NAME_LEN = 255
2801 };
2802
2803 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
2804                      struct lu_attr *attr,
2805                      struct dt_allocation_hint *hint,
2806                      struct dt_object_format *dof,
2807                      struct thandle *th)
2808 {
2809         int result;
2810         struct osd_thandle *oth;
2811         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX | S_ISGID));
2812
2813         LASSERT(S_ISDIR(attr->la_mode));
2814
2815         oth = container_of(th, struct osd_thandle, ot_super);
2816         LASSERT(oth->ot_handle->h_transaction != NULL);
2817         result = osd_mkfile(info, obj, mode, hint, th);
2818
2819         return result;
2820 }
2821
2822 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
2823                         struct lu_attr *attr,
2824                         struct dt_allocation_hint *hint,
2825                         struct dt_object_format *dof,
2826                         struct thandle *th)
2827 {
2828         int result;
2829         struct osd_thandle *oth;
2830         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
2831
2832         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
2833
2834         LASSERT(S_ISREG(attr->la_mode));
2835
2836         oth = container_of(th, struct osd_thandle, ot_super);
2837         LASSERT(oth->ot_handle->h_transaction != NULL);
2838
2839         result = osd_mkfile(info, obj, mode, hint, th);
2840         if (result == 0) {
2841                 LASSERT(obj->oo_inode != NULL);
2842                 if (feat->dif_flags & DT_IND_VARKEY)
2843                         result = iam_lvar_create(obj->oo_inode,
2844                                                  feat->dif_keysize_max,
2845                                                  feat->dif_ptrsize,
2846                                                  feat->dif_recsize_max,
2847                                                  oth->ot_handle);
2848                 else
2849                         result = iam_lfix_create(obj->oo_inode,
2850                                                  feat->dif_keysize_max,
2851                                                  feat->dif_ptrsize,
2852                                                  feat->dif_recsize_max,
2853                                                  oth->ot_handle);
2854
2855         }
2856         return result;
2857 }
2858
2859 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
2860                      struct lu_attr *attr,
2861                      struct dt_allocation_hint *hint,
2862                      struct dt_object_format *dof,
2863                      struct thandle *th)
2864 {
2865         LASSERT(S_ISREG(attr->la_mode));
2866         return osd_mkfile(info, obj, (attr->la_mode &
2867                                (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2868 }
2869
2870 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
2871                      struct lu_attr *attr,
2872                      struct dt_allocation_hint *hint,
2873                      struct dt_object_format *dof,
2874                      struct thandle *th)
2875 {
2876         LASSERT(S_ISLNK(attr->la_mode));
2877         return osd_mkfile(info, obj, (attr->la_mode &
2878                               (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2879 }
2880
2881 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
2882                      struct lu_attr *attr,
2883                      struct dt_allocation_hint *hint,
2884                      struct dt_object_format *dof,
2885                      struct thandle *th)
2886 {
2887         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
2888         int result;
2889
2890         LINVRNT(osd_invariant(obj));
2891         LASSERT(obj->oo_inode == NULL);
2892         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
2893                 S_ISFIFO(mode) || S_ISSOCK(mode));
2894
2895         result = osd_mkfile(info, obj, mode, hint, th);
2896         if (result == 0) {
2897                 LASSERT(obj->oo_inode != NULL);
2898                 /*
2899                  * This inode should be marked dirty for i_rdev.  Currently
2900                  * that is done in the osd_attr_init().
2901                  */
2902                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
2903                                    attr->la_rdev);
2904         }
2905         LINVRNT(osd_invariant(obj));
2906         return result;
2907 }
2908
2909 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
2910                               struct lu_attr *,
2911                               struct dt_allocation_hint *hint,
2912                               struct dt_object_format *dof,
2913                               struct thandle *);
2914
2915 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
2916 {
2917         osd_obj_type_f result;
2918
2919         switch (type) {
2920         case DFT_DIR:
2921                 result = osd_mkdir;
2922                 break;
2923         case DFT_REGULAR:
2924                 result = osd_mkreg;
2925                 break;
2926         case DFT_SYM:
2927                 result = osd_mksym;
2928                 break;
2929         case DFT_NODE:
2930                 result = osd_mknod;
2931                 break;
2932         case DFT_INDEX:
2933                 result = osd_mk_index;
2934                 break;
2935
2936         default:
2937                 LBUG();
2938                 break;
2939         }
2940         return result;
2941 }
2942
2943
2944 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
2945                         struct dt_object *parent, struct dt_object *child,
2946                         umode_t child_mode)
2947 {
2948         LASSERT(ah);
2949
2950         ah->dah_parent = parent;
2951         ah->dah_mode = child_mode;
2952
2953         if (parent != NULL && !dt_object_remote(parent)) {
2954                 /* will help to find FID->ino at dt_insert("..") */
2955                 struct osd_object *pobj = osd_dt_obj(parent);
2956                 osd_idc_find_and_init(env, osd_obj2dev(pobj), pobj);
2957         }
2958 }
2959
2960 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
2961                           struct lu_attr *attr, struct dt_object_format *dof)
2962 {
2963         struct inode   *inode = obj->oo_inode;
2964         __u64           valid = attr->la_valid;
2965         int             result;
2966
2967         attr->la_valid &= ~(LA_TYPE | LA_MODE);
2968
2969         if (dof->dof_type != DFT_NODE)
2970                 attr->la_valid &= ~LA_RDEV;
2971         if ((valid & LA_ATIME) && (attr->la_atime == LTIME_S(inode->i_atime)))
2972                 attr->la_valid &= ~LA_ATIME;
2973         if ((valid & LA_CTIME) && (attr->la_ctime == LTIME_S(inode->i_ctime)))
2974                 attr->la_valid &= ~LA_CTIME;
2975         if ((valid & LA_MTIME) && (attr->la_mtime == LTIME_S(inode->i_mtime)))
2976                 attr->la_valid &= ~LA_MTIME;
2977
2978         result = osd_quota_transfer(inode, attr);
2979         if (result)
2980                 return;
2981
2982         if (attr->la_valid != 0) {
2983                 result = osd_inode_setattr(info->oti_env, inode, attr);
2984                 /*
2985                  * The osd_inode_setattr() should always succeed here.  The
2986                  * only error that could be returned is EDQUOT when we are
2987                  * trying to change the UID or GID of the inode. However, this
2988                  * should not happen since quota enforcement is no longer
2989                  * enabled on ldiskfs (lquota takes care of it).
2990                  */
2991                 LASSERTF(result == 0, "%d\n", result);
2992                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2993         }
2994
2995         attr->la_valid = valid;
2996 }
2997
2998 /**
2999  * Helper function for osd_create()
3000  *
3001  * \retval 0, on success
3002  */
3003 static int __osd_create(struct osd_thread_info *info, struct osd_object *obj,
3004                         struct lu_attr *attr, struct dt_allocation_hint *hint,
3005                         struct dt_object_format *dof, struct thandle *th)
3006 {
3007         int     result;
3008         __u32   umask;
3009
3010         osd_trans_exec_op(info->oti_env, th, OSD_OT_CREATE);
3011
3012         /* we drop umask so that permissions we pass are not affected */
3013         umask = current->fs->umask;
3014         current->fs->umask = 0;
3015
3016         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
3017                                                   th);
3018         if (likely(obj->oo_inode != NULL)) {
3019                 LASSERT(obj->oo_inode->i_state & I_NEW);
3020
3021                 /* Unlock the inode before attr initialization to avoid
3022                  * unnecessary dqget operations. LU-6378 */
3023                 unlock_new_inode(obj->oo_inode);
3024         }
3025
3026         if (likely(result == 0)) {
3027                 osd_attr_init(info, obj, attr, dof);
3028                 osd_object_init0(obj);
3029         }
3030
3031         /* restore previous umask value */
3032         current->fs->umask = umask;
3033
3034         osd_trans_exec_check(info->oti_env, th, OSD_OT_CREATE);
3035
3036         return result;
3037 }
3038
3039 /**
3040  * Helper function for osd_create()
3041  *
3042  * \retval 0, on success
3043  */
3044 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
3045                            const struct lu_fid *fid, struct thandle *th)
3046 {
3047         struct osd_thread_info *info = osd_oti_get(env);
3048         struct osd_inode_id    *id   = &info->oti_id;
3049         struct osd_device      *osd  = osd_obj2dev(obj);
3050         struct osd_thandle     *oh;
3051         int                     rc;
3052
3053         LASSERT(obj->oo_inode != NULL);
3054
3055         oh = container_of0(th, struct osd_thandle, ot_super);
3056         LASSERT(oh->ot_handle);
3057         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3058
3059         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
3060         rc = osd_oi_insert(info, osd, fid, id, oh->ot_handle,
3061                            OI_CHECK_FLD, NULL);
3062         osd_trans_exec_check(env, th, OSD_OT_INSERT);
3063
3064         return rc;
3065 }
3066
3067 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
3068                    u64 seq, struct lu_seq_range *range)
3069 {
3070         struct seq_server_site  *ss = osd_seq_site(osd);
3071
3072         if (fid_seq_is_idif(seq)) {
3073                 fld_range_set_ost(range);
3074                 range->lsr_index = idif_ost_idx(seq);
3075                 return 0;
3076         }
3077
3078         if (!fid_seq_in_fldb(seq)) {
3079                 fld_range_set_mdt(range);
3080                 if (ss != NULL)
3081                         /* FIXME: If ss is NULL, it suppose not get lsr_index
3082                          * at all */
3083                         range->lsr_index = ss->ss_node_id;
3084                 return 0;
3085         }
3086
3087         LASSERT(ss != NULL);
3088         fld_range_set_any(range);
3089         /* OSD will only do local fld lookup */
3090         return fld_local_lookup(env, ss->ss_server_fld, seq, range);
3091 }
3092
3093 static int osd_declare_create(const struct lu_env *env, struct dt_object *dt,
3094                               struct lu_attr *attr,
3095                               struct dt_allocation_hint *hint,
3096                               struct dt_object_format *dof,
3097                               struct thandle *handle)
3098 {
3099         struct osd_thandle *oh;
3100         int rc;
3101         ENTRY;
3102
3103         LASSERT(handle != NULL);
3104
3105         oh = container_of0(handle, struct osd_thandle, ot_super);
3106         LASSERT(oh->ot_handle == NULL);
3107
3108         /* EA object consumes more credits than regular object: osd_mk_index
3109          * vs. osd_mkreg: osd_mk_index will create 2 blocks for root_node and
3110          * leaf_node, could involves the block, block bitmap, groups, GDT
3111          * change for each block, so add 4 * 2 credits in that case. */
3112         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
3113                              osd_dto_credits_noquota[DTO_OBJECT_CREATE] +
3114                              (dof->dof_type == DFT_INDEX) ? 4 * 2 : 0);
3115         /* Reuse idle OI block may cause additional one OI block
3116          * to be changed. */
3117         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3118                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
3119
3120         if (!attr)
3121                 RETURN(0);
3122
3123         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid,
3124                                    attr->la_projid, 1, oh, osd_dt_obj(dt),
3125                                    NULL, OSD_QID_INODE);
3126         if (rc != 0)
3127                 RETURN(rc);
3128
3129         /* will help to find FID->ino mapping at dt_insert() */
3130         rc = osd_idc_find_and_init(env, osd_obj2dev(osd_dt_obj(dt)),
3131                                    osd_dt_obj(dt));
3132
3133         RETURN(rc);
3134 }
3135
3136 /**
3137  * Called to destroy on-disk representation of the object
3138  *
3139  * Concurrency: must be locked
3140  */
3141 static int osd_declare_destroy(const struct lu_env *env, struct dt_object *dt,
3142                                struct thandle *th)
3143 {
3144         struct osd_object  *obj = osd_dt_obj(dt);
3145         struct inode       *inode = obj->oo_inode;
3146         struct osd_thandle *oh;
3147         int                 rc;
3148         ENTRY;
3149
3150         if (inode == NULL)
3151                 RETURN(-ENOENT);
3152
3153         oh = container_of0(th, struct osd_thandle, ot_super);
3154         LASSERT(oh->ot_handle == NULL);
3155
3156         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
3157                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
3158         /* Recycle idle OI leaf may cause additional three OI blocks
3159          * to be changed. */
3160         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3161                 osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3162                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
3163         /* one less inode */
3164         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3165                                    i_projid_read(inode), -1, oh, obj, NULL,
3166                                    OSD_QID_INODE);
3167         if (rc)
3168                 RETURN(rc);
3169         /* data to be truncated */
3170         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3171                                    i_projid_read(inode), 0, oh, obj, NULL,
3172                                    OSD_QID_BLK);
3173         if (rc)
3174                 RETURN(rc);
3175
3176         /* will help to find FID->ino when this object is being
3177          * added to PENDING/ */
3178         rc = osd_idc_find_and_init(env, osd_obj2dev(obj), obj);
3179
3180         RETURN(rc);
3181 }
3182
3183 static int osd_destroy(const struct lu_env *env, struct dt_object *dt,
3184                        struct thandle *th)
3185 {
3186         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
3187         struct osd_object *obj = osd_dt_obj(dt);
3188         struct inode *inode = obj->oo_inode;
3189         struct osd_device *osd = osd_obj2dev(obj);
3190         struct osd_thandle *oh;
3191         int result;
3192         ENTRY;
3193
3194         oh = container_of0(th, struct osd_thandle, ot_super);
3195         LASSERT(oh->ot_handle);
3196         LASSERT(inode);
3197         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
3198
3199         if (unlikely(fid_is_acct(fid)))
3200                 RETURN(-EPERM);
3201
3202         if (S_ISDIR(inode->i_mode)) {
3203                 LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1 ||
3204                         inode->i_nlink == 2);
3205                 /* it will check/delete the inode from remote parent,
3206                  * how to optimize it? unlink performance impaction XXX */
3207                 result = osd_delete_from_remote_parent(env, osd, obj, oh);
3208                 if (result != 0)
3209                         CERROR("%s: delete inode "DFID": rc = %d\n",
3210                                osd_name(osd), PFID(fid), result);
3211
3212                 spin_lock(&obj->oo_guard);
3213                 clear_nlink(inode);
3214                 spin_unlock(&obj->oo_guard);
3215                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3216         }
3217
3218         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
3219
3220         ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
3221
3222         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3223                 result = osd_oi_delete(osd_oti_get(env), osd, fid,
3224                                        oh->ot_handle, OI_CHECK_FLD);
3225
3226         osd_trans_exec_check(env, th, OSD_OT_DESTROY);
3227         /* XXX: add to ext3 orphan list */
3228         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
3229
3230         /* not needed in the cache anymore */
3231         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
3232         obj->oo_destroyed = 1;
3233
3234         RETURN(0);
3235 }
3236
3237 /**
3238  * Put the fid into lustre_mdt_attrs, and then place the structure
3239  * inode's ea. This fid should not be altered during the life time
3240  * of the inode.
3241  *
3242  * \retval +ve, on success
3243  * \retval -ve, on error
3244  *
3245  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
3246  */
3247 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
3248                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
3249 {
3250         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
3251         struct lustre_mdt_attrs *lma = &loa->loa_lma;
3252         int rc;
3253         ENTRY;
3254
3255         if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
3256                 RETURN(0);
3257
3258         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_OST_EA_FID_SET))
3259                 rc = -ENOMEM;
3260
3261         lustre_loa_init(loa, fid, compat, incompat);
3262         lustre_loa_swab(loa, false);
3263
3264         /* For the OST device with 256 bytes inode size by default,
3265          * the PFID EA will be stored together with LMA EA to avoid
3266          * performance trouble. Otherwise the PFID EA can be stored
3267          * independently. LU-8998 */
3268         if ((compat & LMAC_FID_ON_OST) &&
3269             LDISKFS_INODE_SIZE(inode->i_sb) <= 256)
3270                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
3271                                      sizeof(*loa), XATTR_CREATE);
3272         else
3273                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3274                                      sizeof(*lma), XATTR_CREATE);
3275         /* LMA may already exist, but we need to check that all the
3276          * desired compat/incompat flags have been added. */
3277         if (unlikely(rc == -EEXIST)) {
3278                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
3279                                      XATTR_NAME_LMA, (void *)loa, sizeof(*loa));
3280                 if (rc < 0)
3281                         RETURN(rc);
3282
3283                 if (rc < sizeof(*lma))
3284                         RETURN(-EINVAL);
3285
3286                 lustre_loa_swab(loa, true);
3287                 if (lu_fid_eq(fid, &lma->lma_self_fid) &&
3288                     ((compat == 0 && incompat == 0) ||
3289                      (!(~lma->lma_compat & compat) &&
3290                       !(~lma->lma_incompat & incompat))))
3291                         RETURN(0);
3292
3293                 lma->lma_self_fid = *fid;
3294                 lma->lma_compat |= compat;
3295                 lma->lma_incompat |= incompat;
3296                 if (rc == sizeof(*lma)) {
3297                         lustre_lma_swab(lma);
3298                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3299                                              sizeof(*lma), XATTR_REPLACE);
3300                 } else {
3301                         lustre_loa_swab(loa, false);
3302                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
3303                                              sizeof(*loa), XATTR_REPLACE);
3304                 }
3305         }
3306
3307         RETURN(rc);
3308 }
3309
3310 /**
3311  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
3312  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
3313  * To have compatilibility with 1.8 ldiskfs driver we need to have
3314  * magic number at start of fid data.
3315  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
3316  * its inmemory API.
3317  */
3318 static void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
3319                                          const struct lu_fid *fid)
3320 {
3321         if (!fid_is_namespace_visible(fid) ||
3322             OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
3323                 param->edp_magic = 0;
3324                 return;
3325         }
3326
3327         param->edp_magic = LDISKFS_LUFID_MAGIC;
3328         param->edp_len =  sizeof(struct lu_fid) + 1;
3329         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
3330 }
3331
3332 /**
3333  * Try to read the fid from inode ea into dt_rec.
3334  *
3335  * \param fid object fid.
3336  *
3337  * \retval 0 on success
3338  */
3339 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
3340                           __u32 ino, struct lu_fid *fid,
3341                           struct osd_inode_id *id)
3342 {
3343         struct osd_thread_info *info  = osd_oti_get(env);
3344         struct inode           *inode;
3345         ENTRY;
3346
3347         osd_id_gen(id, ino, OSD_OII_NOGEN);
3348         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
3349         if (IS_ERR(inode))
3350                 RETURN(PTR_ERR(inode));
3351
3352         iput(inode);
3353         RETURN(0);
3354 }
3355
3356 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
3357                                         struct inode *dir,
3358                                         struct inode *parent_dir,
3359                                         const struct lu_fid *dot_fid,
3360                                         const struct lu_fid *dot_dot_fid,
3361                                         struct osd_thandle *oth)
3362 {
3363         struct ldiskfs_dentry_param *dot_ldp;
3364         struct ldiskfs_dentry_param *dot_dot_ldp;
3365         __u32 saved_nlink = dir->i_nlink;
3366         int rc;
3367
3368         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
3369         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
3370
3371         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
3372         dot_ldp->edp_magic = 0;
3373
3374         rc = ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
3375                                     dir, dot_ldp, dot_dot_ldp);
3376         /* The ldiskfs_add_dot_dotdot() may dir->i_nlink as 2, then
3377          * the subseqent ref_add() will increase the dir->i_nlink
3378          * as 3. That is incorrect for new created directory.
3379          *
3380          * It looks like hack, because we want to make the OSD API
3381          * to be order-independent for new created directory object
3382          * between dt_insert(..) and ref_add() operations.
3383          *
3384          * Here, we only restore the in-RAM dir-inode's nlink attr,
3385          * becuase if the nlink attr is not 2, then there will be
3386          * ref_add() called following the dt_insert(..), such call
3387          * will make both the in-RAM and on-disk dir-inode's nlink
3388          * attr to be set as 2. LU-7447 */
3389         set_nlink(dir, saved_nlink);
3390         return rc;
3391 }
3392
3393 /**
3394  * Create an local agent inode for remote entry
3395  */
3396 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
3397                                                   struct osd_device *osd,
3398                                                   struct osd_object *pobj,
3399                                                   const struct lu_fid *fid,
3400                                                   __u32 type,
3401                                                   struct thandle *th)
3402 {
3403         struct osd_thread_info  *info = osd_oti_get(env);
3404         struct inode            *local;
3405         struct osd_thandle      *oh;
3406         int                     rc;
3407         ENTRY;
3408
3409         LASSERT(th);
3410         oh = container_of(th, struct osd_thandle, ot_super);
3411         LASSERT(oh->ot_handle->h_transaction != NULL);
3412
3413         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode, type);
3414         if (IS_ERR(local)) {
3415                 CERROR("%s: create local error %d\n", osd_name(osd),
3416                        (int)PTR_ERR(local));
3417                 RETURN(local);
3418         }
3419
3420         /* restore i_gid in case S_ISGID is set, we will inherit S_ISGID and set
3421          * correct gid on remote file, not agent here */
3422         local->i_gid = current_fsgid();
3423         ldiskfs_set_inode_state(local, LDISKFS_STATE_LUSTRE_NOSCRUB);
3424         unlock_new_inode(local);
3425
3426         /* Agent inode should not have project ID */
3427 #ifdef  HAVE_PROJECT_QUOTA
3428         if (LDISKFS_I(pobj->oo_inode)->i_flags & LUSTRE_PROJINHERIT_FL) {
3429                 rc = __ldiskfs_ioctl_setproject(local, 0);
3430                 if (rc) {
3431                         CERROR("%s: quota transfer failed: rc = %d. Is project "
3432                                "quota enforcement enabled on the ldiskfs "
3433                                "filesystem?\n", local->i_sb->s_id, rc);
3434                         RETURN(ERR_PTR(rc));
3435                 }
3436         }
3437 #endif
3438         /* Set special LMA flag for local agent inode */
3439         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
3440         if (rc != 0) {
3441                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
3442                        osd_name(osd), PFID(fid), rc);
3443                 RETURN(ERR_PTR(rc));
3444         }
3445
3446         if (!S_ISDIR(type))
3447                 RETURN(local);
3448
3449         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
3450                                          lu_object_fid(&pobj->oo_dt.do_lu),
3451                                          fid, oh);
3452         if (rc != 0) {
3453                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
3454                         osd_name(osd), PFID(fid), rc);
3455                 RETURN(ERR_PTR(rc));
3456         }
3457
3458         RETURN(local);
3459 }
3460
3461 /**
3462  * when direntry is deleted, we have to take care of possible agent inode
3463  * referenced by that. unfortunately we can't do this at that point:
3464  * iget() within a running transaction leads to deadlock and we better do
3465  * not call that every delete declaration to save performance. so we put
3466  * a potention agent inode on a list and process that once the transaction
3467  * is over. Notice it's not any worse in terms of real orphans as regular
3468  * object destroy doesn't put inodes on the on-disk orphan list. this should
3469  * be addressed separately
3470  */
3471 static int osd_schedule_agent_inode_removal(const struct lu_env *env,
3472                                             struct osd_thandle *oh,
3473                                             __u32 ino)
3474 {
3475         struct osd_device      *osd = osd_dt_dev(oh->ot_super.th_dev);
3476         struct osd_obj_orphan *oor;
3477
3478         OBD_ALLOC_PTR(oor);
3479         if (oor == NULL)
3480                 return -ENOMEM;
3481
3482         oor->oor_ino = ino;
3483         oor->oor_env = (struct lu_env *)env;
3484         spin_lock(&osd->od_osfs_lock);
3485         list_add(&oor->oor_list, &osd->od_orphan_list);
3486         spin_unlock(&osd->od_osfs_lock);
3487
3488         oh->ot_remove_agents = 1;
3489
3490         return 0;
3491
3492 }
3493
3494 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
3495                                                 struct osd_device *osd)
3496 {
3497         struct osd_thread_info *info = osd_oti_get(env);
3498         struct osd_obj_orphan *oor, *tmp;
3499         struct osd_inode_id id;
3500         struct list_head list;
3501         struct inode *inode;
3502         struct lu_fid fid;
3503         handle_t *jh;
3504         __u32 ino;
3505
3506         INIT_LIST_HEAD(&list);
3507
3508         spin_lock(&osd->od_osfs_lock);
3509         list_for_each_entry_safe(oor, tmp, &osd->od_orphan_list, oor_list) {
3510                 if (oor->oor_env == env) {
3511                         list_del(&oor->oor_list);
3512                         list_add(&oor->oor_list, &list);
3513                 }
3514         }
3515         spin_unlock(&osd->od_osfs_lock);
3516
3517         list_for_each_entry_safe(oor, tmp, &list, oor_list) {
3518
3519                 ino = oor->oor_ino;
3520
3521                 list_del(&oor->oor_list);
3522                 OBD_FREE_PTR(oor);
3523
3524                 osd_id_gen(&id, ino, OSD_OII_NOGEN);
3525                 inode = osd_iget_fid(info, osd, &id, &fid);
3526                 if (IS_ERR(inode))
3527                         continue;
3528
3529                 if (!osd_remote_fid(env, osd, &fid)) {
3530                         iput(inode);
3531                         continue;
3532                 }
3533
3534                 jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC, 1);
3535                 clear_nlink(inode);
3536                 mark_inode_dirty(inode);
3537                 ldiskfs_journal_stop(jh);
3538                 iput(inode);
3539         }
3540
3541         return 0;
3542 }
3543
3544 /**
3545  * OSD layer object create function for OST objects (b=11826).
3546  *
3547  * The FID is inserted into inode xattr here.
3548  *
3549  * \retval   0, on success
3550  * \retval -ve, on error
3551  */
3552 static int osd_create(const struct lu_env *env, struct dt_object *dt,
3553                       struct lu_attr *attr, struct dt_allocation_hint *hint,
3554                       struct dt_object_format *dof, struct thandle *th)
3555 {
3556         const struct lu_fid     *fid    = lu_object_fid(&dt->do_lu);
3557         struct osd_object       *obj    = osd_dt_obj(dt);
3558         struct osd_thread_info  *info   = osd_oti_get(env);
3559         int                      result, on_ost = 0;
3560
3561         ENTRY;
3562
3563         if (dt_object_exists(dt))
3564                 RETURN(-EEXIST);
3565
3566         LINVRNT(osd_invariant(obj));
3567         LASSERT(!dt_object_remote(dt));
3568         LASSERT(osd_is_write_locked(env, obj));
3569         LASSERT(th != NULL);
3570
3571         if (unlikely(fid_is_acct(fid)))
3572                 /* Quota files can't be created from the kernel any more,
3573                  * 'tune2fs -O quota' will take care of creating them */
3574                 RETURN(-EPERM);
3575
3576         result = __osd_create(info, obj, attr, hint, dof, th);
3577         if (result == 0) {
3578                 if (fid_is_idif(fid) &&
3579                     !osd_dev(dt->do_lu.lo_dev)->od_index_in_idif) {
3580                         struct lu_fid *tfid = &info->oti_fid;
3581                         struct ost_id *oi   = &info->oti_ostid;
3582
3583                         fid_to_ostid(fid, oi);
3584                         ostid_to_fid(tfid, oi, 0);
3585                         on_ost = 1;
3586                         result = osd_ea_fid_set(info, obj->oo_inode, tfid,
3587                                                 LMAC_FID_ON_OST, 0);
3588                 } else {
3589                         on_ost = fid_is_on_ost(info, osd_obj2dev(obj),
3590                                                fid, OI_CHECK_FLD);
3591                         result = osd_ea_fid_set(info, obj->oo_inode, fid,
3592                                                 on_ost ? LMAC_FID_ON_OST : 0,
3593                                                 0);
3594                 }
3595                 if (obj->oo_dt.do_body_ops == &osd_body_ops_new)
3596                         obj->oo_dt.do_body_ops = &osd_body_ops;
3597         }
3598
3599         if (result == 0)
3600                 result = __osd_oi_insert(env, obj, fid, th);
3601
3602         /* a small optimization - dt_insert() isn't usually applied
3603          * to OST objects, so we don't need to cache OI mapping for
3604          * OST objects */
3605         if (result == 0 && on_ost == 0) {
3606                 struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
3607                 result = osd_idc_find_and_init(env, osd, obj);
3608                 LASSERT(result == 0);
3609         }
3610
3611         LASSERT(ergo(result == 0,
3612                      dt_object_exists(dt) && !dt_object_remote(dt)));
3613         LINVRNT(osd_invariant(obj));
3614         RETURN(result);
3615 }
3616
3617 static int osd_declare_ref_add(const struct lu_env *env, struct dt_object *dt,
3618                                struct thandle *handle)
3619 {
3620         struct osd_thandle *oh;
3621
3622         /* it's possible that object doesn't exist yet */
3623         LASSERT(handle != NULL);
3624
3625         oh = container_of0(handle, struct osd_thandle, ot_super);
3626         LASSERT(oh->ot_handle == NULL);
3627
3628         osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
3629                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
3630
3631         return 0;
3632 }
3633
3634 /*
3635  * Concurrency: @dt is write locked.
3636  */
3637 static int osd_ref_add(const struct lu_env *env, struct dt_object *dt,
3638                        struct thandle *th)
3639 {
3640         struct osd_object  *obj = osd_dt_obj(dt);
3641         struct inode       *inode = obj->oo_inode;
3642         struct osd_thandle *oh;
3643         int                 rc = 0;
3644
3645         if (!dt_object_exists(dt) || obj->oo_destroyed)
3646                 return -ENOENT;
3647
3648         LINVRNT(osd_invariant(obj));
3649         LASSERT(!dt_object_remote(dt));
3650         LASSERT(osd_is_write_locked(env, obj));
3651         LASSERT(th != NULL);
3652
3653         oh = container_of0(th, struct osd_thandle, ot_super);
3654         LASSERT(oh->ot_handle != NULL);
3655
3656         osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
3657
3658         CDEBUG(D_INODE, DFID" increase nlink %d\n",
3659                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
3660         /*
3661          * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
3662          * (65000) subdirectories by storing "1" in i_nlink if the link count
3663          * would otherwise overflow. Directory tranversal tools understand
3664          * that (st_nlink == 1) indicates that the filesystem dose not track
3665          * hard links count on the directory, and will not abort subdirectory
3666          * scanning early once (st_nlink - 2) subdirs have been found.
3667          *
3668          * This also has to properly handle the case of inodes with nlink == 0
3669          * in case they are being linked into the PENDING directory
3670          */
3671         spin_lock(&obj->oo_guard);
3672         if (unlikely(inode->i_nlink == 0))
3673                 /* inc_nlink from 0 may cause WARN_ON */
3674                 set_nlink(inode, 1);
3675         else {
3676                 ldiskfs_inc_count(oh->ot_handle, inode);
3677                 if (!S_ISDIR(inode->i_mode))
3678                         LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
3679         }
3680         spin_unlock(&obj->oo_guard);
3681
3682         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3683         LINVRNT(osd_invariant(obj));
3684
3685         osd_trans_exec_check(env, th, OSD_OT_REF_ADD);
3686
3687         return rc;
3688 }
3689
3690 static int osd_declare_ref_del(const struct lu_env *env, struct dt_object *dt,
3691                                struct thandle *handle)
3692 {
3693         struct osd_thandle *oh;
3694
3695         if (!dt_object_exists(dt))
3696                 return -ENOENT;
3697
3698         LASSERT(!dt_object_remote(dt));
3699         LASSERT(handle != NULL);
3700
3701         oh = container_of0(handle, struct osd_thandle, ot_super);
3702         LASSERT(oh->ot_handle == NULL);
3703
3704         osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
3705                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
3706
3707         return 0;
3708 }
3709
3710 /*
3711  * Concurrency: @dt is write locked.
3712  */
3713 static int osd_ref_del(const struct lu_env *env, struct dt_object *dt,
3714                        struct thandle *th)
3715 {
3716         struct osd_object       *obj = osd_dt_obj(dt);
3717         struct inode            *inode = obj->oo_inode;
3718         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
3719         struct osd_thandle      *oh;
3720
3721         if (!dt_object_exists(dt))
3722                 return -ENOENT;
3723
3724         LINVRNT(osd_invariant(obj));
3725         LASSERT(!dt_object_remote(dt));
3726         LASSERT(osd_is_write_locked(env, obj));
3727         LASSERT(th != NULL);
3728
3729         oh = container_of0(th, struct osd_thandle, ot_super);
3730         LASSERT(oh->ot_handle != NULL);
3731
3732         osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
3733
3734         spin_lock(&obj->oo_guard);
3735         /* That can be result of upgrade from old Lustre version and
3736          * applied only to local files.  Just skip this ref_del call.
3737          * ext4_unlink() only treats this as a warning, don't LASSERT here.*/
3738         if (inode->i_nlink == 0) {
3739                 CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
3740                              D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
3741                              ", maybe an upgraded file? (LU-3915)\n",
3742                              osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
3743                 spin_unlock(&obj->oo_guard);
3744                 return 0;
3745         }
3746
3747         CDEBUG(D_INODE, DFID" decrease nlink %d\n",
3748                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
3749
3750         ldiskfs_dec_count(oh->ot_handle, inode);
3751         spin_unlock(&obj->oo_guard);
3752
3753         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3754         LINVRNT(osd_invariant(obj));
3755
3756         osd_trans_exec_check(env, th, OSD_OT_REF_DEL);
3757
3758         return 0;
3759 }
3760
3761 /*
3762  * Concurrency: @dt is read locked.
3763  */
3764 static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
3765                          struct lu_buf *buf, const char *name)
3766 {
3767         struct osd_object      *obj    = osd_dt_obj(dt);
3768         struct inode           *inode  = obj->oo_inode;
3769         struct osd_thread_info *info   = osd_oti_get(env);
3770         struct dentry          *dentry = &info->oti_obj_dentry;
3771         bool                    cache_xattr = false;
3772         int                     rc;
3773
3774         LASSERT(buf);
3775
3776         /* version get is not real XATTR but uses xattr API */
3777         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
3778                 dt_obj_version_t *ver = buf->lb_buf;
3779
3780                 /* for version we are just using xattr API but change inode
3781                  * field instead */
3782                 if (buf->lb_len == 0)
3783                         return sizeof(dt_obj_version_t);
3784
3785                 if (buf->lb_len < sizeof(dt_obj_version_t))
3786                         return -ERANGE;
3787
3788                 CDEBUG(D_INODE, "Get version %#llx for inode %lu\n",
3789                        LDISKFS_I(inode)->i_fs_version, inode->i_ino);
3790
3791                 *ver = LDISKFS_I(inode)->i_fs_version;
3792
3793                 return sizeof(dt_obj_version_t);
3794         }
3795
3796         if (!dt_object_exists(dt))
3797                 return -ENOENT;
3798
3799         LASSERT(!dt_object_remote(dt));
3800         LASSERT(inode->i_op != NULL);
3801         LASSERT(inode->i_op->getxattr != NULL);
3802
3803         if (strcmp(name, XATTR_NAME_LOV) == 0 ||
3804             strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0)
3805                 cache_xattr = true;
3806
3807         if (cache_xattr) {
3808                 rc = osd_oxc_get(obj, name, buf);
3809                 if (rc != -ENOENT)
3810                         return rc;
3811         }
3812
3813         rc = __osd_xattr_get(inode, dentry, name, buf->lb_buf, buf->lb_len);
3814         if (rc == -ENODATA && strcmp(name, XATTR_NAME_FID) == 0) {
3815                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
3816                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
3817                 struct filter_fid *ff;
3818                 struct ost_layout *ol;
3819
3820                 LASSERT(osd_dev(dt->do_lu.lo_dev)->od_is_ost);
3821
3822                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
3823                 if (rc)
3824                         return rc;
3825
3826                 if (!(lma->lma_compat & LMAC_STRIPE_INFO)) {
3827                         rc = -ENODATA;
3828                         goto cache;
3829                 }
3830
3831                 rc = sizeof(*ff);
3832                 if (buf->lb_len == 0 || !buf->lb_buf)
3833                         return rc;
3834
3835                 if (buf->lb_len < rc)
3836                         return -ERANGE;
3837
3838                 ff = buf->lb_buf;
3839                 ol = &ff->ff_layout;
3840                 ol->ol_stripe_count = cpu_to_le32(loa->loa_parent_fid.f_ver >>
3841                                                   PFID_STRIPE_IDX_BITS);
3842                 ol->ol_stripe_size = cpu_to_le32(loa->loa_stripe_size);
3843                 loa->loa_parent_fid.f_ver &= PFID_STRIPE_COUNT_MASK;
3844                 fid_cpu_to_le(&ff->ff_parent, &loa->loa_parent_fid);
3845                 if (lma->lma_compat & LMAC_COMP_INFO) {
3846                         ol->ol_comp_start = cpu_to_le64(loa->loa_comp_start);
3847                         ol->ol_comp_end = cpu_to_le64(loa->loa_comp_end);
3848                         ol->ol_comp_id = cpu_to_le32(loa->loa_comp_id);
3849                 } else {
3850                         ol->ol_comp_start = 0;
3851                         ol->ol_comp_end = 0;
3852                         ol->ol_comp_id = 0;
3853                 }
3854         }
3855
3856 cache:
3857         if (cache_xattr) {
3858                 if (rc == -ENOENT || rc == -ENODATA)
3859                         osd_oxc_add(obj, name, NULL, 0);
3860                 else if (rc > 0 && buf->lb_buf != NULL)
3861                         osd_oxc_add(obj, name, buf->lb_buf, rc);
3862         }
3863
3864         return rc;
3865 }
3866
3867 static int osd_declare_xattr_set(const struct lu_env *env,
3868                                  struct dt_object *dt,
3869                                  const struct lu_buf *buf, const char *name,
3870                                  int fl, struct thandle *handle)
3871 {
3872         struct osd_thandle *oh;
3873         int credits = 0;
3874         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
3875
3876         LASSERT(handle != NULL);
3877
3878         oh = container_of0(handle, struct osd_thandle, ot_super);
3879         LASSERT(oh->ot_handle == NULL);
3880
3881         if (strcmp(name, XATTR_NAME_LMA) == 0) {
3882                 /* For non-upgrading case, the LMA is set first and
3883                  * usually fit inode. But for upgrade case, the LMA
3884                  * may be in another separated EA block. */
3885                 if (dt_object_exists(dt)) {
3886                         if (fl == LU_XATTR_REPLACE)
3887                                 credits = 1;
3888                         else
3889                                 goto upgrade;
3890                 }
3891         } else if (strcmp(name, XATTR_NAME_VERSION) == 0) {
3892                 credits = 1;
3893         } else if (strcmp(name, XATTR_NAME_FID) == 0) {
3894                 /* We may need to delete the old PFID EA. */
3895                 credits = LDISKFS_MAXQUOTAS_DEL_BLOCKS(sb);
3896                 if (fl == LU_XATTR_REPLACE)
3897                         credits += 1;
3898                 else
3899                         goto upgrade;
3900         } else {
3901
3902 upgrade:
3903                 credits += osd_dto_credits_noquota[DTO_XATTR_SET];
3904
3905                 if (buf != NULL) {
3906                         ssize_t buflen;
3907
3908                         if (buf->lb_buf == NULL && dt_object_exists(dt)) {
3909                                 /* learn xattr size from osd_xattr_get if
3910                                    attribute has not been read yet */
3911                                 buflen = __osd_xattr_get(
3912                                     osd_dt_obj(dt)->oo_inode,
3913                                     &osd_oti_get(env)->oti_obj_dentry,
3914                                     name, NULL, 0);
3915                                 if (buflen < 0)
3916                                         buflen = 0;
3917                         } else {
3918                                 buflen = buf->lb_len;
3919                         }
3920
3921                         if (buflen > sb->s_blocksize) {
3922                                 credits += osd_calc_bkmap_credits(
3923                                     sb, NULL, 0, -1,
3924                                     (buflen + sb->s_blocksize - 1) >>
3925                                     sb->s_blocksize_bits);
3926                         }
3927                 }
3928                 /*
3929                  * xattr set may involve inode quota change, reserve credits for
3930                  * dquot_initialize()
3931                  */
3932                 credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
3933         }
3934
3935         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET, credits);
3936
3937         return 0;
3938 }
3939
3940 /*
3941  * Concurrency: @dt is write locked.
3942  */
3943 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
3944                          const struct lu_buf *buf, const char *name, int fl,
3945                          struct thandle *handle)
3946 {
3947         struct osd_object *obj = osd_dt_obj(dt);
3948         struct inode *inode = obj->oo_inode;
3949         struct osd_thread_info *info = osd_oti_get(env);
3950         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
3951         struct lustre_mdt_attrs *lma = &loa->loa_lma;
3952         int fs_flags = 0;
3953         int len;
3954         int rc;
3955         ENTRY;
3956
3957         LASSERT(handle);
3958         LASSERT(buf);
3959
3960         /* version set is not real XATTR */
3961         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
3962                 dt_obj_version_t *version = buf->lb_buf;
3963
3964                 /* for version we are just using xattr API but change inode
3965                  * field instead */
3966                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
3967
3968                 CDEBUG(D_INODE, "Set version %#llx (old %#llx) for inode %lu\n",
3969                        *version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
3970
3971                 LDISKFS_I(inode)->i_fs_version = *version;
3972                 /* Version is set after all inode operations are finished,
3973                  * so we should mark it dirty here */
3974                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3975
3976                 RETURN(0);
3977         }
3978
3979         CDEBUG(D_INODE, DFID" set xattr '%s' with size %zu\n",
3980                PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
3981
3982         len = buf->lb_len;
3983         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
3984         if (fl & LU_XATTR_REPLACE)
3985                 fs_flags |= XATTR_REPLACE;
3986
3987         if (fl & LU_XATTR_CREATE)
3988                 fs_flags |= XATTR_CREATE;
3989
3990         /* For the OST device with 256 bytes inode size by default,
3991          * the PFID EA will be stored together with LMA EA to avoid
3992          * performance trouble. Otherwise the PFID EA can be stored
3993          * independently. LU-8998 */
3994         if (strcmp(name, XATTR_NAME_FID) == 0 &&
3995             LDISKFS_INODE_SIZE(inode->i_sb) <= 256) {
3996                 struct dentry *dentry = &info->oti_obj_dentry;
3997                 struct filter_fid *ff;
3998                 struct ost_layout *ol;
3999                 int fl;
4000
4001                 LASSERT(osd_dev(dt->do_lu.lo_dev)->od_is_ost);
4002
4003                 ff = buf->lb_buf;
4004                 ol = &ff->ff_layout;
4005                 /* Old client does not send stripe information, store
4006                  * the PFID EA on disk directly. */
4007                 if (buf->lb_len == sizeof(struct lu_fid) ||
4008                     ol->ol_stripe_size == 0) {
4009                         len = sizeof(struct lu_fid);
4010                         goto set;
4011                 }
4012
4013                 if (buf->lb_len != sizeof(*ff))
4014                         RETURN(-EINVAL);
4015
4016                 rc = osd_get_lma(info, inode, dentry, loa);
4017                 if (unlikely(rc == -ENODATA)) {
4018                         /* Usually for upgarding from old device */
4019                         lustre_loa_init(loa, lu_object_fid(&dt->do_lu),
4020                                         LMAC_FID_ON_OST, 0);
4021                         fl = XATTR_CREATE;
4022                 } else if (rc) {
4023                         RETURN(rc);
4024                 } else {
4025                         fl = XATTR_REPLACE;
4026                 }
4027
4028                 fid_le_to_cpu(&loa->loa_parent_fid, &ff->ff_parent);
4029                 loa->loa_parent_fid.f_ver |= le32_to_cpu(ol->ol_stripe_count) <<
4030                                              PFID_STRIPE_IDX_BITS;
4031                 loa->loa_stripe_size = le32_to_cpu(ol->ol_stripe_size);
4032                 lma->lma_compat |= LMAC_STRIPE_INFO;
4033                 if (ol->ol_comp_id != 0) {
4034                         loa->loa_comp_id = le32_to_cpu(ol->ol_comp_id);
4035                         loa->loa_comp_start = le64_to_cpu(ol->ol_comp_start);
4036                         loa->loa_comp_end = le64_to_cpu(ol->ol_comp_end);
4037                         lma->lma_compat |= LMAC_COMP_INFO;
4038                 }
4039
4040                 lustre_loa_swab(loa, false);
4041
4042                 /* Remove old PFID EA entry firstly. */
4043                 ll_vfs_dq_init(inode);
4044                 rc = inode->i_op->removexattr(dentry, name);
4045                 if (rc && rc != -ENODATA)
4046                         RETURN(rc);
4047
4048                 /* Store the PFID EA inside the LMA EA. */
4049                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
4050                                      sizeof(*loa), fl);
4051
4052                 RETURN(rc);
4053         } else if (strcmp(name, XATTR_NAME_LMV) == 0) {
4054                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
4055                 if (rc)
4056                         RETURN(rc);
4057
4058                 lma->lma_incompat |= LMAI_STRIPED;
4059                 lustre_lma_swab(lma);
4060                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4061                                      sizeof(*lma), XATTR_REPLACE);
4062                 if (rc != 0)
4063                         RETURN(rc);
4064         }
4065
4066 set:
4067         rc = __osd_xattr_set(info, inode, name, buf->lb_buf, len, fs_flags);
4068         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
4069
4070         if (rc == 0 &&
4071             (strcmp(name, XATTR_NAME_LOV) == 0 ||
4072              strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
4073                 osd_oxc_add(obj, name, buf->lb_buf, buf->lb_len);
4074
4075         return rc;
4076 }
4077
4078 /*
4079  * Concurrency: @dt is read locked.
4080  */
4081 static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
4082                           const struct lu_buf *buf)
4083 {
4084         struct osd_object      *obj    = osd_dt_obj(dt);
4085         struct inode           *inode  = obj->oo_inode;
4086         struct osd_thread_info *info   = osd_oti_get(env);
4087         struct dentry          *dentry = &info->oti_obj_dentry;
4088
4089         if (!dt_object_exists(dt))
4090                 return -ENOENT;
4091
4092         LASSERT(!dt_object_remote(dt));
4093         LASSERT(inode->i_op != NULL);
4094         LASSERT(inode->i_op->listxattr != NULL);
4095
4096         dentry->d_inode = inode;
4097         dentry->d_sb = inode->i_sb;
4098         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
4099 }
4100
4101 static int osd_declare_xattr_del(const struct lu_env *env,
4102                                  struct dt_object *dt, const char *name,
4103                                  struct thandle *handle)
4104 {
4105         struct osd_thandle *oh;
4106         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
4107
4108         LASSERT(!dt_object_remote(dt));
4109         LASSERT(handle != NULL);
4110
4111         oh = container_of0(handle, struct osd_thandle, ot_super);
4112         LASSERT(oh->ot_handle == NULL);
4113
4114         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
4115                              osd_dto_credits_noquota[DTO_XATTR_SET]);
4116         /*
4117          * xattr del may involve inode quota change, reserve credits for
4118          * dquot_initialize()
4119          */
4120         oh->ot_credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
4121
4122         return 0;
4123 }
4124
4125 /*
4126  * Concurrency: @dt is write locked.
4127  */
4128 static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
4129                          const char *name, struct thandle *handle)
4130 {
4131         struct osd_object      *obj    = osd_dt_obj(dt);
4132         struct inode           *inode  = obj->oo_inode;
4133         struct osd_thread_info *info   = osd_oti_get(env);
4134         struct dentry          *dentry = &info->oti_obj_dentry;
4135         int                     rc;
4136
4137         if (!dt_object_exists(dt))
4138                 return -ENOENT;
4139
4140         LASSERT(!dt_object_remote(dt));
4141         LASSERT(inode->i_op != NULL);
4142         LASSERT(inode->i_op->removexattr != NULL);
4143         LASSERT(handle != NULL);
4144
4145         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
4146
4147         ll_vfs_dq_init(inode);
4148         dentry->d_inode = inode;
4149         dentry->d_sb = inode->i_sb;
4150         rc = inode->i_op->removexattr(dentry, name);
4151         if (rc == -ENODATA && strcmp(name, XATTR_NAME_FID) == 0) {
4152                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
4153
4154                 LASSERT(osd_dev(dt->do_lu.lo_dev)->od_is_ost);
4155
4156                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
4157                                  &info->oti_ost_attrs);
4158                 if (!rc) {
4159                         if (!(lma->lma_compat & LMAC_STRIPE_INFO)) {
4160                                 rc = -ENODATA;
4161                                 goto out;
4162                         }
4163
4164                         lma->lma_compat &= ~(LMAC_STRIPE_INFO | LMAC_COMP_INFO);
4165                         lustre_lma_swab(lma);
4166                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4167                                              sizeof(*lma), XATTR_REPLACE);
4168                 }
4169         }
4170
4171 out:
4172         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
4173
4174         if (rc == 0 &&
4175             (strcmp(name, XATTR_NAME_LOV) == 0 ||
4176              strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
4177                 osd_oxc_del(obj, name);
4178
4179         return rc;
4180 }
4181
4182 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt,
4183                            __u64 start, __u64 end)
4184 {
4185         struct osd_object       *obj    = osd_dt_obj(dt);
4186         struct inode            *inode  = obj->oo_inode;
4187         struct osd_thread_info  *info   = osd_oti_get(env);
4188         struct dentry           *dentry = &info->oti_obj_dentry;
4189         struct file             *file   = &info->oti_file;
4190         int                     rc;
4191
4192         ENTRY;
4193
4194         dentry->d_inode = inode;
4195         dentry->d_sb = inode->i_sb;
4196         file->f_path.dentry = dentry;
4197         file->f_mapping = inode->i_mapping;
4198         file->f_op = inode->i_fop;
4199         set_file_inode(file, inode);
4200
4201         rc = ll_vfs_fsync_range(file, start, end, 0);
4202
4203         RETURN(rc);
4204 }
4205
4206 static int osd_invalidate(const struct lu_env *env, struct dt_object *dt)
4207 {
4208         return 0;
4209 }
4210
4211 /*
4212  * Index operations.
4213  */
4214
4215 static int osd_iam_index_probe(const struct lu_env *env, struct osd_object *o,
4216                            const struct dt_index_features *feat)
4217 {
4218         struct iam_descr *descr;
4219
4220         if (osd_object_is_root(o))
4221                 return feat == &dt_directory_features;
4222
4223         LASSERT(o->oo_dir != NULL);
4224
4225         descr = o->oo_dir->od_container.ic_descr;
4226         if (feat == &dt_directory_features) {
4227                 if (descr->id_rec_size == sizeof(struct osd_fid_pack))
4228                         return 1;
4229                 else
4230                         return 0;
4231         } else {
4232                 return
4233                         feat->dif_keysize_min <= descr->id_key_size &&
4234                         descr->id_key_size <= feat->dif_keysize_max &&
4235                         feat->dif_recsize_min <= descr->id_rec_size &&
4236                         descr->id_rec_size <= feat->dif_recsize_max &&
4237                         !(feat->dif_flags & (DT_IND_VARKEY |
4238                                              DT_IND_VARREC | DT_IND_NONUNQ)) &&
4239                         ergo(feat->dif_flags & DT_IND_UPDATE,
4240                              1 /* XXX check that object (and file system) is
4241                                 * writable */);
4242         }
4243 }
4244
4245 static int osd_iam_container_init(const struct lu_env *env,
4246                                   struct osd_object *obj,
4247                                   struct osd_directory *dir)
4248 {
4249         struct iam_container *bag = &dir->od_container;
4250         int result;
4251
4252         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
4253         if (result != 0)
4254                 return result;
4255
4256         result = iam_container_setup(bag);
4257         if (result == 0)
4258                 obj->oo_dt.do_index_ops = &osd_index_iam_ops;
4259         else
4260                 iam_container_fini(bag);
4261
4262         return result;
4263 }
4264
4265
4266 /*
4267  * Concurrency: no external locking is necessary.
4268  */
4269 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
4270                          const struct dt_index_features *feat)
4271 {
4272         int                      result;
4273         int                      skip_iam = 0;
4274         struct osd_object       *obj = osd_dt_obj(dt);
4275
4276         LINVRNT(osd_invariant(obj));
4277
4278         if (osd_object_is_root(obj)) {
4279                 dt->do_index_ops = &osd_index_ea_ops;
4280                 result = 0;
4281         } else if (feat == &dt_directory_features) {
4282                 dt->do_index_ops = &osd_index_ea_ops;
4283                 if (obj->oo_inode == NULL || S_ISDIR(obj->oo_inode->i_mode))
4284                         result = 0;
4285                 else
4286                         result = -ENOTDIR;
4287                 skip_iam = 1;
4288         } else if (unlikely(feat == &dt_otable_features)) {
4289                 dt->do_index_ops = &osd_otable_ops;
4290                 return 0;
4291         } else if (unlikely(feat == &dt_acct_features)) {
4292                 dt->do_index_ops = &osd_acct_index_ops;
4293                 result = 0;
4294                 skip_iam = 1;
4295         } else if (!osd_has_index(obj)) {
4296                 struct osd_directory *dir;
4297
4298                 OBD_ALLOC_PTR(dir);
4299                 if (dir != NULL) {
4300
4301                         spin_lock(&obj->oo_guard);
4302                         if (obj->oo_dir == NULL)
4303                                 obj->oo_dir = dir;
4304                         else
4305                                 /*
4306                                  * Concurrent thread allocated container data.
4307                                  */
4308                                 OBD_FREE_PTR(dir);
4309                         spin_unlock(&obj->oo_guard);
4310                         /*
4311                          * Now, that we have container data, serialize its
4312                          * initialization.
4313                          */
4314                         down_write(&obj->oo_ext_idx_sem);
4315                         /*
4316                          * recheck under lock.
4317                          */
4318                         if (!osd_has_index(obj))
4319                                 result = osd_iam_container_init(env, obj,
4320                                                                 obj->oo_dir);
4321                         else
4322                                 result = 0;
4323                         up_write(&obj->oo_ext_idx_sem);
4324                 } else {
4325                         result = -ENOMEM;
4326                 }
4327         } else {
4328                 result = 0;
4329         }
4330
4331         if (result == 0 && skip_iam == 0) {
4332                 if (!osd_iam_index_probe(env, obj, feat))
4333                         result = -ENOTDIR;
4334         }
4335         LINVRNT(osd_invariant(obj));
4336
4337         return result;
4338 }
4339
4340 static int osd_otable_it_attr_get(const struct lu_env *env,
4341                                  struct dt_object *dt,
4342                                  struct lu_attr *attr)
4343 {
4344         attr->la_valid = 0;
4345         return 0;
4346 }
4347
4348 static const struct dt_object_operations osd_obj_ops = {
4349         .do_read_lock           = osd_read_lock,
4350         .do_write_lock          = osd_write_lock,
4351         .do_read_unlock         = osd_read_unlock,
4352         .do_write_unlock        = osd_write_unlock,
4353         .do_write_locked        = osd_write_locked,
4354         .do_attr_get            = osd_attr_get,
4355         .do_declare_attr_set    = osd_declare_attr_set,
4356         .do_attr_set            = osd_attr_set,
4357         .do_ah_init             = osd_ah_init,
4358         .do_declare_create      = osd_declare_create,
4359         .do_create              = osd_create,
4360         .do_declare_destroy     = osd_declare_destroy,
4361         .do_destroy             = osd_destroy,
4362         .do_index_try           = osd_index_try,
4363         .do_declare_ref_add     = osd_declare_ref_add,
4364         .do_ref_add             = osd_ref_add,
4365         .do_declare_ref_del     = osd_declare_ref_del,
4366         .do_ref_del             = osd_ref_del,
4367         .do_xattr_get           = osd_xattr_get,
4368         .do_declare_xattr_set   = osd_declare_xattr_set,
4369         .do_xattr_set           = osd_xattr_set,
4370         .do_declare_xattr_del   = osd_declare_xattr_del,
4371         .do_xattr_del           = osd_xattr_del,
4372         .do_xattr_list          = osd_xattr_list,
4373         .do_object_sync         = osd_object_sync,
4374         .do_invalidate          = osd_invalidate,
4375 };
4376
4377 static const struct dt_object_operations osd_obj_otable_it_ops = {
4378         .do_attr_get    = osd_otable_it_attr_get,
4379         .do_index_try   = osd_index_try,
4380 };
4381
4382 static int osd_index_declare_iam_delete(const struct lu_env *env,
4383                                         struct dt_object *dt,
4384                                         const struct dt_key *key,
4385                                         struct thandle *handle)
4386 {
4387         struct osd_thandle    *oh;
4388
4389         oh = container_of0(handle, struct osd_thandle, ot_super);
4390         LASSERT(oh->ot_handle == NULL);
4391
4392         /* Recycle  may cause additional three blocks to be changed. */
4393         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
4394                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
4395
4396         return 0;
4397 }
4398
4399 /**
4400  *      delete a (key, value) pair from index \a dt specified by \a key
4401  *
4402  *      \param  dt      osd index object
4403  *      \param  key     key for index
4404  *      \param  rec     record reference
4405  *      \param  handle  transaction handler
4406  *
4407  *      \retval  0  success
4408  *      \retval -ve   failure
4409  */
4410 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
4411                                 const struct dt_key *key,
4412                                 struct thandle *handle)
4413 {
4414         struct osd_thread_info *oti = osd_oti_get(env);
4415         struct osd_object      *obj = osd_dt_obj(dt);
4416         struct osd_thandle     *oh;
4417         struct iam_path_descr  *ipd;
4418         struct iam_container   *bag = &obj->oo_dir->od_container;
4419         int                     rc;
4420         ENTRY;
4421
4422         if (!dt_object_exists(dt))
4423                 RETURN(-ENOENT);
4424
4425         LINVRNT(osd_invariant(obj));
4426         LASSERT(!dt_object_remote(dt));
4427         LASSERT(bag->ic_object == obj->oo_inode);
4428         LASSERT(handle != NULL);
4429
4430         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
4431
4432         ipd = osd_idx_ipd_get(env, bag);
4433         if (unlikely(ipd == NULL))
4434                 RETURN(-ENOMEM);
4435
4436         oh = container_of0(handle, struct osd_thandle, ot_super);
4437         LASSERT(oh->ot_handle != NULL);
4438         LASSERT(oh->ot_handle->h_transaction != NULL);
4439
4440         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
4441                 /* swab quota uid/gid provided by caller */
4442                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
4443                 key = (const struct dt_key *)&oti->oti_quota_id;
4444         }
4445
4446         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
4447         osd_ipd_put(env, bag, ipd);
4448         LINVRNT(osd_invariant(obj));
4449         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
4450         RETURN(rc);
4451 }
4452
4453 static int osd_index_declare_ea_delete(const struct lu_env *env,
4454                                        struct dt_object *dt,
4455                                        const struct dt_key *key,
4456                                        struct thandle *handle)
4457 {
4458         struct osd_thandle *oh;
4459         struct inode       *inode;
4460         int                 rc, credits;
4461         ENTRY;
4462
4463         LASSERT(!dt_object_remote(dt));
4464         LASSERT(handle != NULL);
4465
4466         oh = container_of0(handle, struct osd_thandle, ot_super);
4467         LASSERT(oh->ot_handle == NULL);
4468
4469         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE];
4470         if (key != NULL && unlikely(strcmp((char *)key, dotdot) == 0)) {
4471                 /* '..' to a remote object has a local representative */
4472                 credits += osd_dto_credits_noquota[DTO_INDEX_DELETE];
4473                 /* to reset LMAI_REMOTE_PARENT */
4474                 credits += 1;
4475         }
4476         osd_trans_declare_op(env, oh, OSD_OT_DELETE, credits);
4477
4478         inode = osd_dt_obj(dt)->oo_inode;
4479         if (inode == NULL)
4480                 RETURN(-ENOENT);
4481
4482         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
4483                                    i_projid_read(inode), 0, oh, osd_dt_obj(dt),
4484                                    NULL, OSD_QID_BLK);
4485         RETURN(rc);
4486 }
4487
4488 static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
4489                                           struct dt_rec *fid)
4490 {
4491         struct osd_fid_pack *rec;
4492         int                  rc = -ENODATA;
4493
4494         if (de->file_type & LDISKFS_DIRENT_LUFID) {
4495                 rec = (struct osd_fid_pack *) (de->name + de->name_len + 1);
4496                 rc = osd_fid_unpack((struct lu_fid *)fid, rec);
4497                 if (rc == 0 && unlikely(!fid_is_sane((struct lu_fid *)fid)))
4498                         rc = -EINVAL;
4499         }
4500         return rc;
4501 }
4502
4503 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
4504                           const struct lu_fid *fid)
4505 {
4506         struct seq_server_site  *ss = osd_seq_site(osd);
4507         ENTRY;
4508
4509         /* FID seqs not in FLDB, must be local seq */
4510         if (unlikely(!fid_seq_in_fldb(fid_seq(fid))))
4511                 RETURN(0);
4512
4513         /* If FLD is not being initialized yet, it only happens during the
4514          * initialization, likely during mgs initialization, and we assume
4515          * this is local FID. */
4516         if (ss == NULL || ss->ss_server_fld == NULL)
4517                 RETURN(0);
4518
4519         /* Only check the local FLDB here */
4520         if (osd_seq_exists(env, osd, fid_seq(fid)))
4521                 RETURN(0);
4522
4523         RETURN(1);
4524 }
4525
4526 /**
4527  * Index delete function for interoperability mode (b11826).
4528  * It will remove the directory entry added by osd_index_ea_insert().
4529  * This entry is needed to maintain name->fid mapping.
4530  *
4531  * \param key,  key i.e. file entry to be deleted
4532  *
4533  * \retval   0, on success
4534  * \retval -ve, on error
4535  */
4536 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
4537                                const struct dt_key *key, struct thandle *handle)
4538 {
4539         struct osd_object          *obj = osd_dt_obj(dt);
4540         struct inode               *dir = obj->oo_inode;
4541         struct dentry              *dentry;
4542         struct osd_thandle         *oh;
4543         struct ldiskfs_dir_entry_2 *de = NULL;
4544         struct buffer_head         *bh;
4545         struct htree_lock          *hlock = NULL;
4546         struct lu_fid              *fid = &osd_oti_get(env)->oti_fid;
4547         struct osd_device          *osd = osd_dev(dt->do_lu.lo_dev);
4548         int                        rc;
4549         ENTRY;
4550
4551         if (!dt_object_exists(dt))
4552                 RETURN(-ENOENT);
4553
4554         LINVRNT(osd_invariant(obj));
4555         LASSERT(!dt_object_remote(dt));
4556         LASSERT(handle != NULL);
4557
4558         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
4559
4560         oh = container_of(handle, struct osd_thandle, ot_super);
4561         LASSERT(oh->ot_handle != NULL);
4562         LASSERT(oh->ot_handle->h_transaction != NULL);
4563
4564         ll_vfs_dq_init(dir);
4565         dentry = osd_child_dentry_get(env, obj,
4566                                       (char *)key, strlen((char *)key));
4567
4568         if (obj->oo_hl_head != NULL) {
4569                 hlock = osd_oti_get(env)->oti_hlock;
4570                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
4571                                    dir, LDISKFS_HLOCK_DEL);
4572         } else {
4573                 down_write(&obj->oo_ext_idx_sem);
4574         }
4575
4576         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
4577         if (!IS_ERR(bh)) {
4578                 /* If this is not the ".." entry, it might be a remote DNE
4579                  * entry and  we need to check if the FID is for a remote
4580                  * MDT.  If the FID is  not in the directory entry (e.g.
4581                  * upgraded 1.8 filesystem without dirdata enabled) then
4582                  * we need to get the FID from the LMA. For a remote directory
4583                  * there HAS to be an LMA, it cannot be an IGIF inode in this
4584                  * case.
4585                  *
4586                  * Delete the entry before the agent inode in order to
4587                  * simplify error handling.  At worst an error after deleting
4588                  * the entry first might leak the agent inode afterward. The
4589                  * reverse would need filesystem abort in case of error deleting
4590                  * the entry after the agent had been removed, or leave a
4591                  * dangling entry pointing at a random inode. */
4592                 if (strcmp((char *)key, dotdot) != 0) {
4593                         LASSERT(de != NULL);
4594                         rc = osd_get_fid_from_dentry(de, (struct dt_rec *)fid);
4595                         if (rc == -ENODATA) {
4596                                 /* can't get FID, postpone to the end of the
4597                                  * transaction when iget() is safe */
4598                                 osd_schedule_agent_inode_removal(env, oh,
4599                                                 le32_to_cpu(de->inode));
4600                         } else if (rc == 0 &&
4601                                    unlikely(osd_remote_fid(env, osd, fid))) {
4602                                 osd_schedule_agent_inode_removal(env, oh,
4603                                                 le32_to_cpu(de->inode));
4604                         }
4605                 }
4606                 rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
4607                 brelse(bh);
4608         } else {
4609                 rc = PTR_ERR(bh);
4610         }
4611         if (hlock != NULL)
4612                 ldiskfs_htree_unlock(hlock);
4613         else
4614                 up_write(&obj->oo_ext_idx_sem);
4615
4616         if (rc != 0)
4617                 GOTO(out, rc);
4618
4619         /* For inode on the remote MDT, .. will point to
4620          * /Agent directory, Check whether it needs to delete
4621          * from agent directory */
4622         if (unlikely(strcmp((char *)key, dotdot) == 0)) {
4623                 int ret;
4624
4625                 ret = osd_delete_from_remote_parent(env, osd_obj2dev(obj),
4626                                                     obj, oh);
4627                 if (ret != 0)
4628                         /* Sigh, the entry has been deleted, and
4629                          * it is not easy to revert it back, so
4630                          * let's keep this error private, and let
4631                          * LFSCK fix it. XXX */
4632                         CERROR("%s: delete remote parent "DFID": rc = %d\n",
4633                                osd_name(osd), PFID(fid), ret);
4634         }
4635 out:
4636         LASSERT(osd_invariant(obj));
4637         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
4638         RETURN(rc);
4639 }
4640
4641 /**
4642  *      Lookup index for \a key and copy record to \a rec.
4643  *
4644  *      \param  dt      osd index object
4645  *      \param  key     key for index
4646  *      \param  rec     record reference
4647  *
4648  *      \retval  +ve  success : exact mach
4649  *      \retval  0    return record with key not greater than \a key
4650  *      \retval -ve   failure
4651  */
4652 static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
4653                                 struct dt_rec *rec, const struct dt_key *key)
4654 {
4655         struct osd_object      *obj = osd_dt_obj(dt);
4656         struct iam_path_descr  *ipd;
4657         struct iam_container   *bag = &obj->oo_dir->od_container;
4658         struct osd_thread_info *oti = osd_oti_get(env);
4659         struct iam_iterator    *it = &oti->oti_idx_it;
4660         struct iam_rec         *iam_rec;
4661         int                     rc;
4662         ENTRY;
4663
4664         if (!dt_object_exists(dt))
4665                 RETURN(-ENOENT);
4666
4667         LASSERT(osd_invariant(obj));
4668         LASSERT(!dt_object_remote(dt));
4669         LASSERT(bag->ic_object == obj->oo_inode);
4670
4671         ipd = osd_idx_ipd_get(env, bag);
4672         if (IS_ERR(ipd))
4673                 RETURN(-ENOMEM);
4674
4675         /* got ipd now we can start iterator. */
4676         iam_it_init(it, bag, 0, ipd);
4677
4678         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
4679                 /* swab quota uid/gid provided by caller */
4680                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
4681                 key = (const struct dt_key *)&oti->oti_quota_id;
4682         }
4683
4684         rc = iam_it_get(it, (struct iam_key *)key);
4685         if (rc >= 0) {
4686                 if (S_ISDIR(obj->oo_inode->i_mode))
4687                         iam_rec = (struct iam_rec *)oti->oti_ldp;
4688                 else
4689                         iam_rec = (struct iam_rec *) rec;
4690
4691                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)iam_rec);
4692
4693                 if (S_ISDIR(obj->oo_inode->i_mode))
4694                         osd_fid_unpack((struct lu_fid *) rec,
4695                                        (struct osd_fid_pack *)iam_rec);
4696                 else if (fid_is_quota(lu_object_fid(&dt->do_lu)))
4697                         osd_quota_unpack(obj, rec);
4698         }
4699
4700         iam_it_put(it);
4701         iam_it_fini(it);
4702         osd_ipd_put(env, bag, ipd);
4703
4704         LINVRNT(osd_invariant(obj));
4705
4706         RETURN(rc);
4707 }
4708
4709 static int osd_index_declare_iam_insert(const struct lu_env *env,
4710                                         struct dt_object *dt,
4711                                         const struct dt_rec *rec,
4712                                         const struct dt_key *key,
4713                                         struct thandle *handle)
4714 {
4715         struct osd_thandle *oh;
4716
4717         LASSERT(handle != NULL);
4718
4719         oh = container_of0(handle, struct osd_thandle, ot_super);
4720         LASSERT(oh->ot_handle == NULL);
4721
4722         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
4723                              osd_dto_credits_noquota[DTO_INDEX_INSERT]);
4724
4725         return 0;
4726 }
4727
4728 /**
4729  *      Inserts (key, value) pair in \a dt index object.
4730  *
4731  *      \param  dt      osd index object
4732  *      \param  key     key for index
4733  *      \param  rec     record reference
4734  *      \param  th      transaction handler
4735  *
4736  *      \retval  0  success
4737  *      \retval -ve failure
4738  */
4739 static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
4740                                 const struct dt_rec *rec,
4741                                 const struct dt_key *key, struct thandle *th,
4742                                 int ignore_quota)
4743 {
4744         struct osd_object     *obj = osd_dt_obj(dt);
4745         struct iam_path_descr *ipd;
4746         struct osd_thandle    *oh;
4747         struct iam_container  *bag;
4748         struct osd_thread_info *oti = osd_oti_get(env);
4749         struct iam_rec         *iam_rec;
4750         int                     rc;
4751         ENTRY;
4752
4753         if (!dt_object_exists(dt))
4754                 RETURN(-ENOENT);
4755
4756         LINVRNT(osd_invariant(obj));
4757         LASSERT(!dt_object_remote(dt));
4758
4759         bag = &obj->oo_dir->od_container;
4760         LASSERT(bag->ic_object == obj->oo_inode);
4761         LASSERT(th != NULL);
4762
4763         osd_trans_exec_op(env, th, OSD_OT_INSERT);
4764
4765         ipd = osd_idx_ipd_get(env, bag);
4766         if (unlikely(ipd == NULL))
4767                 RETURN(-ENOMEM);
4768
4769         oh = container_of0(th, struct osd_thandle, ot_super);
4770         LASSERT(oh->ot_handle != NULL);
4771         LASSERT(oh->ot_handle->h_transaction != NULL);
4772         if (S_ISDIR(obj->oo_inode->i_mode)) {
4773                 iam_rec = (struct iam_rec *)oti->oti_ldp;
4774                 osd_fid_pack((struct osd_fid_pack *)iam_rec, rec, &oti->oti_fid);
4775         } else if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
4776                 /* pack quota uid/gid */
4777                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
4778                 key = (const struct dt_key *)&oti->oti_quota_id;
4779                 /* pack quota record */
4780                 rec = osd_quota_pack(obj, rec, &oti->oti_quota_rec);
4781                 iam_rec = (struct iam_rec *)rec;
4782         } else {
4783                 iam_rec = (struct iam_rec *)rec;
4784         }
4785
4786         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
4787                         iam_rec, ipd);
4788         osd_ipd_put(env, bag, ipd);
4789         LINVRNT(osd_invariant(obj));
4790         osd_trans_exec_check(env, th, OSD_OT_INSERT);
4791         RETURN(rc);
4792 }
4793
4794 /**
4795  * Calls ldiskfs_add_entry() to add directory entry
4796  * into the directory. This is required for
4797  * interoperability mode (b11826)
4798  *
4799  * \retval   0, on success
4800  * \retval -ve, on error
4801  */
4802 static int __osd_ea_add_rec(struct osd_thread_info *info,
4803                             struct osd_object *pobj, struct inode  *cinode,
4804                             const char *name, const struct lu_fid *fid,
4805                             struct htree_lock *hlock, struct thandle *th)
4806 {
4807         struct ldiskfs_dentry_param *ldp;
4808         struct dentry               *child;
4809         struct osd_thandle          *oth;
4810         int                          rc;
4811
4812         oth = container_of(th, struct osd_thandle, ot_super);
4813         LASSERT(oth->ot_handle != NULL);
4814         LASSERT(oth->ot_handle->h_transaction != NULL);
4815         LASSERT(pobj->oo_inode);
4816
4817         ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
4818         if (unlikely(pobj->oo_inode ==
4819                      osd_sb(osd_obj2dev(pobj))->s_root->d_inode))
4820                 ldp->edp_magic = 0;
4821         else
4822                 osd_get_ldiskfs_dirent_param(ldp, fid);
4823         child = osd_child_dentry_get(info->oti_env, pobj, name, strlen(name));
4824         child->d_fsdata = (void *)ldp;
4825         ll_vfs_dq_init(pobj->oo_inode);
4826         rc = osd_ldiskfs_add_entry(info, osd_obj2dev(pobj), oth->ot_handle,
4827                                    child, cinode, hlock);
4828         if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_TYPE)) {
4829                 struct ldiskfs_dir_entry_2      *de;
4830                 struct buffer_head              *bh;
4831                 int                              rc1;
4832
4833                 bh = osd_ldiskfs_find_entry(pobj->oo_inode, &child->d_name, &de,
4834                                             NULL, hlock);
4835                 if (!IS_ERR(bh)) {
4836                         rc1 = ldiskfs_journal_get_write_access(oth->ot_handle,
4837                                                                bh);
4838                         if (rc1 == 0) {
4839                                 if (S_ISDIR(cinode->i_mode))
4840                                         de->file_type = LDISKFS_DIRENT_LUFID |
4841                                                         LDISKFS_FT_REG_FILE;
4842                                 else
4843                                         de->file_type = LDISKFS_DIRENT_LUFID |
4844                                                         LDISKFS_FT_DIR;
4845                                 ldiskfs_handle_dirty_metadata(oth->ot_handle,
4846                                                               NULL, bh);
4847                         }
4848                         brelse(bh);
4849                 }
4850         }
4851
4852         RETURN(rc);
4853 }
4854
4855 /**
4856  * Calls ldiskfs_add_dot_dotdot() to add dot and dotdot entries
4857  * into the directory.Also sets flags into osd object to
4858  * indicate dot and dotdot are created. This is required for
4859  * interoperability mode (b11826)
4860  *
4861  * \param dir   directory for dot and dotdot fixup.
4862  * \param obj   child object for linking
4863  *
4864  * \retval   0, on success
4865  * \retval -ve, on error
4866  */
4867 static int osd_add_dot_dotdot(struct osd_thread_info *info,
4868                               struct osd_object *dir,
4869                               struct inode *parent_dir, const char *name,
4870                               const struct lu_fid *dot_fid,
4871                               const struct lu_fid *dot_dot_fid,
4872                               struct thandle *th)
4873 {
4874         struct inode                *inode = dir->oo_inode;
4875         struct osd_thandle          *oth;
4876         int result = 0;
4877
4878         oth = container_of(th, struct osd_thandle, ot_super);
4879         LASSERT(oth->ot_handle->h_transaction != NULL);
4880         LASSERT(S_ISDIR(dir->oo_inode->i_mode));
4881
4882         if (strcmp(name, dot) == 0) {
4883                 if (dir->oo_compat_dot_created) {
4884                         result = -EEXIST;
4885                 } else {
4886                         LASSERT(inode->i_ino == parent_dir->i_ino);
4887                         dir->oo_compat_dot_created = 1;
4888                         result = 0;
4889                 }
4890         } else if (strcmp(name, dotdot) == 0) {
4891                 if (!dir->oo_compat_dot_created)
4892                         return -EINVAL;
4893                 /* in case of rename, dotdot is already created */
4894                 if (dir->oo_compat_dotdot_created) {
4895                         return __osd_ea_add_rec(info, dir, parent_dir, name,
4896                                                 dot_dot_fid, NULL, th);
4897                 }
4898
4899                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PARENT)) {
4900                         struct lu_fid tfid = *dot_dot_fid;
4901
4902                         tfid.f_oid--;
4903                         result = osd_add_dot_dotdot_internal(info,
4904                                         dir->oo_inode, parent_dir, dot_fid,
4905                                         &tfid, oth);
4906                 } else {
4907                         result = osd_add_dot_dotdot_internal(info,
4908                                         dir->oo_inode, parent_dir, dot_fid,
4909                                         dot_dot_fid, oth);
4910                 }
4911
4912                 if (result == 0)
4913                         dir->oo_compat_dotdot_created = 1;
4914         }
4915
4916         return result;
4917 }
4918
4919
4920 /**
4921  * It will call the appropriate osd_add* function and return the
4922  * value, return by respective functions.
4923  */
4924 static int osd_ea_add_rec(const struct lu_env *env, struct osd_object *pobj,
4925                           struct inode *cinode, const char *name,
4926                           const struct lu_fid *fid, struct thandle *th)
4927 {
4928         struct osd_thread_info *info   = osd_oti_get(env);
4929         struct htree_lock      *hlock;
4930         int                     rc;
4931
4932         hlock = pobj->oo_hl_head != NULL ? info->oti_hlock : NULL;
4933
4934         if (name[0] == '.' && (name[1] == '\0' || (name[1] == '.' &&
4935                                                    name[2] =='\0'))) {
4936                 if (hlock != NULL) {
4937                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
4938                                            pobj->oo_inode, 0);
4939                 } else {
4940                         down_write(&pobj->oo_ext_idx_sem);
4941                 }
4942
4943                 rc = osd_add_dot_dotdot(info, pobj, cinode, name,
4944                                         lu_object_fid(&pobj->oo_dt.do_lu),
4945                                         fid, th);
4946         } else {
4947                 if (hlock != NULL) {
4948                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
4949                                            pobj->oo_inode, LDISKFS_HLOCK_ADD);
4950                 } else {
4951                         down_write(&pobj->oo_ext_idx_sem);
4952                 }
4953
4954                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_INDIR)) {
4955                         struct lu_fid *tfid = &info->oti_fid;
4956
4957                         *tfid = *fid;
4958                         tfid->f_ver = ~0;
4959                         rc = __osd_ea_add_rec(info, pobj, cinode, name,
4960                                               tfid, hlock, th);
4961                 } else {
4962                         rc = __osd_ea_add_rec(info, pobj, cinode, name, fid,
4963                                               hlock, th);
4964                 }
4965         }
4966         if (hlock != NULL)
4967                 ldiskfs_htree_unlock(hlock);
4968         else
4969                 up_write(&pobj->oo_ext_idx_sem);
4970
4971         return rc;
4972 }
4973
4974 static int
4975 osd_consistency_check(struct osd_thread_info *oti, struct osd_device *dev,
4976                       struct osd_idmap_cache *oic)
4977 {
4978         struct osd_scrub *scrub = &dev->od_scrub;
4979         struct lu_fid *fid = &oic->oic_fid;
4980         struct osd_inode_id *id = &oic->oic_lid;
4981         struct inode *inode = NULL;
4982         int once  = 0;
4983         bool insert;
4984         int rc;
4985         ENTRY;
4986
4987         if (!fid_is_norm(fid) && !fid_is_igif(fid))
4988                 RETURN(0);
4989
4990         if (scrub->os_pos_current > id->oii_ino)
4991                 RETURN(0);
4992
4993 again:
4994         rc = osd_oi_lookup(oti, dev, fid, &oti->oti_id, 0);
4995         if (rc == -ENOENT) {
4996                 __u32 gen = id->oii_gen;
4997
4998                 insert = true;
4999                 if (inode != NULL)
5000                         goto trigger;
5001
5002                 inode = osd_iget(oti, dev, id);
5003                 /* The inode has been removed (by race maybe). */
5004                 if (IS_ERR(inode)) {
5005                         rc = PTR_ERR(inode);
5006
5007                         RETURN(rc == -ESTALE ? -ENOENT : rc);
5008                 }
5009
5010                 /* The OI mapping is lost. */
5011                 if (gen != OSD_OII_NOGEN)
5012                         goto trigger;
5013
5014                 /* The inode may has been reused by others, we do not know,
5015                  * leave it to be handled by subsequent osd_fid_lookup(). */
5016                 GOTO(out, rc = 0);
5017         } else if (rc || osd_id_eq(id, &oti->oti_id)) {
5018                 GOTO(out, rc);
5019         }
5020
5021         insert = false;
5022
5023 trigger:
5024         if (thread_is_running(&scrub->os_thread)) {
5025                 if (inode == NULL) {
5026                         inode = osd_iget(oti, dev, id);
5027                         /* The inode has been removed (by race maybe). */
5028                         if (IS_ERR(inode)) {
5029                                 rc = PTR_ERR(inode);
5030
5031                                 RETURN(rc == -ESTALE ? -ENOENT : rc);
5032                         }
5033                 }
5034
5035                 rc = osd_oii_insert(dev, oic, insert);
5036                 /* There is race condition between osd_oi_lookup and OI scrub.
5037                  * The OI scrub finished just after osd_oi_lookup() failure.
5038                  * Under such case, it is unnecessary to trigger OI scrub again,
5039                  * but try to call osd_oi_lookup() again. */
5040                 if (unlikely(rc == -EAGAIN))
5041                         goto again;
5042
5043                 if (!S_ISDIR(inode->i_mode))
5044                         rc = 0;
5045                 else
5046                         rc = osd_check_lmv(oti, dev, inode, oic);
5047
5048                 GOTO(out, rc);
5049         }
5050
5051         if (!dev->od_noscrub && ++once == 1) {
5052                 rc = osd_scrub_start(dev, SS_AUTO_PARTIAL | SS_CLEAR_DRYRUN |
5053                                      SS_CLEAR_FAILOUT);
5054                 CDEBUG(D_LFSCK | D_CONSOLE | D_WARNING,
5055                        "%s: trigger partial OI scrub for RPC inconsistency "
5056                        "checking FID "DFID": rc = %d\n",
5057                        osd_dev2name(dev), PFID(fid), rc);
5058                 if (rc == 0 || rc == -EALREADY)
5059                         goto again;
5060         }
5061
5062         GOTO(out, rc);
5063
5064 out:
5065         if (inode)
5066                 iput(inode);
5067
5068         RETURN(rc);
5069 }
5070
5071 static int osd_fail_fid_lookup(struct osd_thread_info *oti,
5072                                struct osd_device *dev,
5073                                struct osd_idmap_cache *oic,
5074                                struct lu_fid *fid, __u32 ino)
5075 {
5076         struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
5077         struct inode *inode;
5078         int rc;
5079
5080         osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
5081         inode = osd_iget(oti, dev, &oic->oic_lid);
5082         if (IS_ERR(inode)) {
5083                 fid_zero(&oic->oic_fid);
5084                 return PTR_ERR(inode);
5085         }
5086
5087         rc = osd_get_lma(oti, inode, &oti->oti_obj_dentry, loa);
5088         iput(inode);
5089         if (rc != 0)
5090                 fid_zero(&oic->oic_fid);
5091         else
5092                 *fid = oic->oic_fid = loa->loa_lma.lma_self_fid;
5093         return rc;
5094 }
5095
5096 void osd_add_oi_cache(struct osd_thread_info *info, struct osd_device *osd,
5097                       struct osd_inode_id *id, const struct lu_fid *fid)
5098 {
5099         CDEBUG(D_INODE, "add "DFID" %u:%u to info %p\n", PFID(fid),
5100                id->oii_ino, id->oii_gen, info);
5101         info->oti_cache.oic_lid = *id;
5102         info->oti_cache.oic_fid = *fid;
5103         info->oti_cache.oic_dev = osd;
5104 }
5105
5106 /**
5107  * Get parent FID from the linkEA.
5108  *
5109  * For a directory which parent resides on remote MDT, to satisfy the
5110  * local e2fsck, we insert it into the /REMOTE_PARENT_DIR locally. On
5111  * the other hand, to make the lookup(..) on the directory can return
5112  * the real parent FID, we append the real parent FID after its ".."
5113  * name entry in the /REMOTE_PARENT_DIR.
5114  *
5115  * Unfortunately, such PFID-in-dirent cannot be preserved via file-level
5116  * backup. So after the restore, we cannot get the right parent FID from
5117  * its ".." name entry in the /REMOTE_PARENT_DIR. Under such case, since
5118  * we have stored the real parent FID in the directory object's linkEA,
5119  * we can parse the linkEA for the real parent FID.
5120  *
5121  * \param[in] env       pointer to the thread context
5122  * \param[in] obj       pointer to the object to be handled
5123  * \param[out]fid       pointer to the buffer to hold the parent FID
5124  *
5125  * \retval              0 for getting the real parent FID successfully
5126  * \retval              negative error number on failure
5127  */
5128 static int osd_get_pfid_from_linkea(const struct lu_env *env,
5129                                     struct osd_object *obj,
5130                                     struct lu_fid *fid)
5131 {
5132         struct osd_thread_info  *oti    = osd_oti_get(env);
5133         struct lu_buf           *buf    = &oti->oti_big_buf;
5134         struct dentry           *dentry = &oti->oti_obj_dentry;
5135         struct inode            *inode  = obj->oo_inode;
5136         struct linkea_data       ldata  = { NULL };
5137         int                      rc;
5138         ENTRY;
5139
5140         fid_zero(fid);
5141         if (!S_ISDIR(inode->i_mode))
5142                 RETURN(-EIO);
5143
5144 again:
5145         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
5146                              buf->lb_buf, buf->lb_len);
5147         if (rc == -ERANGE) {
5148                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
5149                                      NULL, 0);
5150                 if (rc > 0) {
5151                         lu_buf_realloc(buf, rc);
5152                         if (buf->lb_buf == NULL)
5153                                 RETURN(-ENOMEM);
5154
5155                         goto again;
5156                 }
5157         }
5158
5159         if (unlikely(rc == 0))
5160                 RETURN(-ENODATA);
5161
5162         if (rc < 0)
5163                 RETURN(rc);
5164
5165         if (unlikely(buf->lb_buf == NULL)) {
5166                 lu_buf_realloc(buf, rc);
5167                 if (buf->lb_buf == NULL)
5168                         RETURN(-ENOMEM);
5169
5170                 goto again;
5171         }
5172
5173         ldata.ld_buf = buf;
5174         rc = linkea_init_with_rec(&ldata);
5175         if (!rc) {
5176                 linkea_first_entry(&ldata);
5177                 linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, NULL, fid);
5178         }
5179
5180         RETURN(rc);
5181 }
5182
5183 static int osd_verify_ent_by_linkea(const struct lu_env *env,
5184                                     struct inode *inode,
5185                                     const struct lu_fid *pfid,
5186                                     const char *name, const int namelen)
5187 {
5188         struct osd_thread_info *oti = osd_oti_get(env);
5189         struct lu_buf *buf = &oti->oti_big_buf;
5190         struct dentry *dentry = &oti->oti_obj_dentry;
5191         struct linkea_data ldata = { NULL };
5192         struct lu_name cname = { .ln_name = name,
5193                                  .ln_namelen = namelen };
5194         int rc;
5195         ENTRY;
5196
5197 again:
5198         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
5199                              buf->lb_buf, buf->lb_len);
5200         if (rc == -ERANGE)
5201                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK, NULL, 0);
5202
5203         if (rc < 0)
5204                 RETURN(rc);
5205
5206         if (unlikely(rc == 0))
5207                 RETURN(-ENODATA);
5208
5209         if (buf->lb_len < rc) {
5210                 lu_buf_realloc(buf, rc);
5211                 if (buf->lb_buf == NULL)
5212                         RETURN(-ENOMEM);
5213
5214                 goto again;
5215         }
5216
5217         ldata.ld_buf = buf;
5218         rc = linkea_init_with_rec(&ldata);
5219         if (!rc)
5220                 rc = linkea_links_find(&ldata, &cname, pfid);
5221
5222         RETURN(rc);
5223 }
5224
5225 /**
5226  * Calls ->lookup() to find dentry. From dentry get inode and
5227  * read inode's ea to get fid. This is required for  interoperability
5228  * mode (b11826)
5229  *
5230  * \retval   0, on success
5231  * \retval -ve, on error
5232  */
5233 static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
5234                              struct dt_rec *rec, const struct dt_key *key)
5235 {
5236         struct inode                    *dir    = obj->oo_inode;
5237         struct dentry                   *dentry;
5238         struct ldiskfs_dir_entry_2      *de;
5239         struct buffer_head              *bh;
5240         struct lu_fid                   *fid = (struct lu_fid *) rec;
5241         struct htree_lock               *hlock = NULL;
5242         int                             ino;
5243         int                             rc;
5244         ENTRY;
5245
5246         LASSERT(dir->i_op != NULL);
5247         LASSERT(dir->i_op->lookup != NULL);
5248
5249         dentry = osd_child_dentry_get(env, obj,
5250                                       (char *)key, strlen((char *)key));
5251
5252         if (obj->oo_hl_head != NULL) {
5253                 hlock = osd_oti_get(env)->oti_hlock;
5254                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
5255                                    dir, LDISKFS_HLOCK_LOOKUP);
5256         } else {
5257                 down_read(&obj->oo_ext_idx_sem);
5258         }
5259
5260         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
5261         if (!IS_ERR(bh)) {
5262                 struct osd_thread_info *oti = osd_oti_get(env);
5263                 struct osd_inode_id *id = &oti->oti_id;
5264                 struct osd_idmap_cache *oic = &oti->oti_cache;
5265                 struct osd_device *dev = osd_obj2dev(obj);
5266
5267                 ino = le32_to_cpu(de->inode);
5268                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP)) {
5269                         brelse(bh);
5270                         rc = osd_fail_fid_lookup(oti, dev, oic, fid, ino);
5271                         GOTO(out, rc);
5272                 }
5273
5274                 rc = osd_get_fid_from_dentry(de, rec);
5275
5276                 /* done with de, release bh */
5277                 brelse(bh);
5278                 if (rc != 0) {
5279                         if (unlikely(ino == osd_remote_parent_ino(dev))) {
5280                                 const char *name = (const char *)key;
5281
5282                                 /* If the parent is on remote MDT, and there
5283                                  * is no FID-in-dirent, then we have to get
5284                                  * the parent FID from the linkEA.  */
5285                                 if (likely(strlen(name) == 2 &&
5286                                            name[0] == '.' && name[1] == '.'))
5287                                         rc = osd_get_pfid_from_linkea(env, obj,
5288                                                                       fid);
5289                         } else {
5290                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
5291                         }
5292                 } else {
5293                         osd_id_gen(id, ino, OSD_OII_NOGEN);
5294                 }
5295
5296                 if (rc != 0 || osd_remote_fid(env, dev, fid)) {
5297                         fid_zero(&oic->oic_fid);
5298
5299                         GOTO(out, rc);
5300                 }
5301
5302                 osd_add_oi_cache(osd_oti_get(env), osd_obj2dev(obj), id, fid);
5303                 rc = osd_consistency_check(oti, dev, oic);
5304                 if (rc != 0)
5305                         fid_zero(&oic->oic_fid);
5306         } else {
5307                 rc = PTR_ERR(bh);
5308         }
5309
5310         GOTO(out, rc);
5311
5312 out:
5313         if (hlock != NULL)
5314                 ldiskfs_htree_unlock(hlock);
5315         else
5316                 up_read(&obj->oo_ext_idx_sem);
5317         return rc;
5318 }
5319
5320 static int osd_index_declare_ea_insert(const struct lu_env *env,
5321                                        struct dt_object *dt,
5322                                        const struct dt_rec *rec,
5323                                        const struct dt_key *key,
5324                                        struct thandle *handle)
5325 {
5326         struct osd_thandle      *oh;
5327         struct osd_device       *osd   = osd_dev(dt->do_lu.lo_dev);
5328         struct dt_insert_rec    *rec1   = (struct dt_insert_rec *)rec;
5329         const struct lu_fid     *fid    = rec1->rec_fid;
5330         int                      credits, rc = 0;
5331         struct osd_idmap_cache  *idc;
5332         ENTRY;
5333
5334         LASSERT(!dt_object_remote(dt));
5335         LASSERT(handle != NULL);
5336         LASSERT(fid != NULL);
5337         LASSERT(rec1->rec_type != 0);
5338
5339         oh = container_of0(handle, struct osd_thandle, ot_super);
5340         LASSERT(oh->ot_handle == NULL);
5341
5342         credits = osd_dto_credits_noquota[DTO_INDEX_INSERT];
5343
5344         /* we can't call iget() while a transactions is running
5345          * (this can lead to a deadlock), but we need to know
5346          * inum and object type. so we find this information at
5347          * declaration and cache in per-thread info */
5348         idc = osd_idc_find_or_init(env, osd, fid);
5349         if (IS_ERR(idc))
5350                 RETURN(PTR_ERR(idc));
5351         if (idc->oic_remote) {
5352                 /* a reference to remote inode is represented by an
5353                  * agent inode which we have to create */
5354                 credits += osd_dto_credits_noquota[DTO_OBJECT_CREATE];
5355                 credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
5356         }
5357
5358         osd_trans_declare_op(env, oh, OSD_OT_INSERT, credits);
5359
5360         if (osd_dt_obj(dt)->oo_inode != NULL) {
5361                 struct inode *inode = osd_dt_obj(dt)->oo_inode;
5362
5363                 /* We ignore block quota on meta pool (MDTs), so needn't
5364                  * calculate how many blocks will be consumed by this index
5365                  * insert */
5366                 rc = osd_declare_inode_qid(env, i_uid_read(inode),
5367                                            i_gid_read(inode),
5368                                            i_projid_read(inode), 0,
5369                                            oh, osd_dt_obj(dt), NULL,
5370                                            OSD_QID_BLK);
5371         }
5372
5373         RETURN(rc);
5374 }
5375
5376 /**
5377  * Index add function for interoperability mode (b11826).
5378  * It will add the directory entry.This entry is needed to
5379  * maintain name->fid mapping.
5380  *
5381  * \param key it is key i.e. file entry to be inserted
5382  * \param rec it is value of given key i.e. fid
5383  *
5384  * \retval   0, on success
5385  * \retval -ve, on error
5386  */
5387 static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
5388                                const struct dt_rec *rec,
5389                                const struct dt_key *key, struct thandle *th,
5390                                int ignore_quota)
5391 {
5392         struct osd_object       *obj = osd_dt_obj(dt);
5393         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
5394         struct dt_insert_rec    *rec1   = (struct dt_insert_rec *)rec;
5395         const struct lu_fid     *fid    = rec1->rec_fid;
5396         const char              *name = (const char *)key;
5397         struct osd_thread_info  *oti   = osd_oti_get(env);
5398         struct inode            *child_inode = NULL;
5399         struct osd_idmap_cache  *idc;
5400         int                     rc;
5401         ENTRY;
5402
5403         if (!dt_object_exists(dt))
5404                 RETURN(-ENOENT);
5405
5406         LASSERT(osd_invariant(obj));
5407         LASSERT(!dt_object_remote(dt));
5408         LASSERT(th != NULL);
5409
5410         osd_trans_exec_op(env, th, OSD_OT_INSERT);
5411
5412         LASSERTF(fid_is_sane(fid), "fid"DFID" is insane!\n", PFID(fid));
5413
5414         idc = osd_idc_find(env, osd, fid);
5415         if (unlikely(idc == NULL)) {
5416                 /* this dt_insert() wasn't declared properly, so
5417                  * FID is missing in OI cache. we better do not
5418                  * lookup FID in FLDB/OI and don't risk to deadlock,
5419                  * but in some special cases (lfsck testing, etc)
5420                  * it's much simpler than fixing a caller */
5421                 CERROR("%s: "DFID" wasn't declared for insert\n",
5422                        osd_name(osd), PFID(fid));
5423                 dump_stack();
5424                 idc = osd_idc_find_or_init(env, osd, fid);
5425                 if (IS_ERR(idc))
5426                         RETURN(PTR_ERR(idc));
5427         }
5428
5429         if (idc->oic_remote) {
5430                 /* Insert remote entry */
5431                 if (strcmp(name, dotdot) == 0 && strlen(name) == 2) {
5432                         struct osd_mdobj_map    *omm = osd->od_mdt_map;
5433                         struct osd_thandle      *oh;
5434
5435                         /* If parent on remote MDT, we need put this object
5436                          * under AGENT */
5437                         oh = container_of(th, typeof(*oh), ot_super);
5438                         rc = osd_add_to_remote_parent(env, osd, obj, oh);
5439                         if (rc != 0) {
5440                                 CERROR("%s: add "DFID" error: rc = %d\n",
5441                                        osd_name(osd),
5442                                        PFID(lu_object_fid(&dt->do_lu)), rc);
5443                                 RETURN(rc);
5444                         }
5445
5446                         child_inode = igrab(omm->omm_remote_parent->d_inode);
5447                 } else {
5448                         child_inode = osd_create_local_agent_inode(env, osd,
5449                                         obj, fid, rec1->rec_type & S_IFMT, th);
5450                         if (IS_ERR(child_inode))
5451                                 RETURN(PTR_ERR(child_inode));
5452                 }
5453         } else {
5454                 /* Insert local entry */
5455                 if (unlikely(idc->oic_lid.oii_ino == 0)) {
5456                         /* for a reason OI cache wasn't filled properly */
5457                         CERROR("%s: OIC for "DFID" isn't filled\n",
5458                                osd_name(osd), PFID(fid));
5459                         RETURN(-EINVAL);
5460                 }
5461                 child_inode = oti->oti_inode;
5462                 if (unlikely(child_inode == NULL)) {
5463                         struct ldiskfs_inode_info *lii;
5464                         OBD_ALLOC_PTR(lii);
5465                         if (lii == NULL)
5466                                 RETURN(-ENOMEM);
5467                         child_inode = oti->oti_inode = &lii->vfs_inode;
5468                 }
5469                 child_inode->i_sb = osd_sb(osd);
5470                 child_inode->i_ino = idc->oic_lid.oii_ino;
5471                 child_inode->i_mode = rec1->rec_type & S_IFMT;
5472         }
5473
5474         rc = osd_ea_add_rec(env, obj, child_inode, name, fid, th);
5475
5476         CDEBUG(D_INODE, "parent %lu insert %s:%lu rc = %d\n",
5477                obj->oo_inode->i_ino, name, child_inode->i_ino, rc);
5478
5479         if (child_inode && child_inode != oti->oti_inode)
5480                 iput(child_inode);
5481         LASSERT(osd_invariant(obj));
5482         osd_trans_exec_check(env, th, OSD_OT_INSERT);
5483         RETURN(rc);
5484 }
5485
5486 /**
5487  *  Initialize osd Iterator for given osd index object.
5488  *
5489  *  \param  dt      osd index object
5490  */
5491
5492 static struct dt_it *osd_it_iam_init(const struct lu_env *env,
5493                                      struct dt_object *dt,
5494                                      __u32 unused)
5495 {
5496         struct osd_it_iam      *it;
5497         struct osd_object      *obj = osd_dt_obj(dt);
5498         struct lu_object       *lo  = &dt->do_lu;
5499         struct iam_path_descr  *ipd;
5500         struct iam_container   *bag = &obj->oo_dir->od_container;
5501
5502         if (!dt_object_exists(dt))
5503                 return ERR_PTR(-ENOENT);
5504
5505         OBD_ALLOC_PTR(it);
5506         if (it == NULL)
5507                 return ERR_PTR(-ENOMEM);
5508
5509         ipd = osd_it_ipd_get(env, bag);
5510         if (likely(ipd != NULL)) {
5511                 it->oi_obj = obj;
5512                 it->oi_ipd = ipd;
5513                 lu_object_get(lo);
5514                 iam_it_init(&it->oi_it, bag, IAM_IT_MOVE, ipd);
5515                 return (struct dt_it *)it;
5516         } else {
5517                 OBD_FREE_PTR(it);
5518                 return ERR_PTR(-ENOMEM);
5519         }
5520 }
5521
5522 /**
5523  * free given Iterator.
5524  */
5525 static void osd_it_iam_fini(const struct lu_env *env, struct dt_it *di)
5526 {
5527         struct osd_it_iam       *it  = (struct osd_it_iam *)di;
5528         struct osd_object       *obj = it->oi_obj;
5529
5530         iam_it_fini(&it->oi_it);
5531         osd_ipd_put(env, &obj->oo_dir->od_container, it->oi_ipd);
5532         osd_object_put(env, obj);
5533         OBD_FREE_PTR(it);
5534 }
5535
5536 /**
5537  *  Move Iterator to record specified by \a key
5538  *
5539  *  \param  di      osd iterator
5540  *  \param  key     key for index
5541  *
5542  *  \retval +ve  di points to record with least key not larger than key
5543  *  \retval  0   di points to exact matched key
5544  *  \retval -ve  failure
5545  */
5546
5547 static int osd_it_iam_get(const struct lu_env *env,
5548                           struct dt_it *di, const struct dt_key *key)
5549 {
5550         struct osd_thread_info  *oti = osd_oti_get(env);
5551         struct osd_it_iam       *it = (struct osd_it_iam *)di;
5552
5553         if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
5554                 /* swab quota uid/gid */
5555                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
5556                 key = (struct dt_key *)&oti->oti_quota_id;
5557         }
5558
5559         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
5560 }
5561
5562 /**
5563  *  Release Iterator
5564  *
5565  *  \param  di      osd iterator
5566  */
5567 static void osd_it_iam_put(const struct lu_env *env, struct dt_it *di)
5568 {
5569         struct osd_it_iam *it = (struct osd_it_iam *)di;
5570
5571         iam_it_put(&it->oi_it);
5572 }
5573
5574 /**
5575  *  Move iterator by one record
5576  *
5577  *  \param  di      osd iterator
5578  *
5579  *  \retval +1   end of container reached
5580  *  \retval  0   success
5581  *  \retval -ve  failure
5582  */
5583
5584 static int osd_it_iam_next(const struct lu_env *env, struct dt_it *di)
5585 {
5586         struct osd_it_iam *it = (struct osd_it_iam *)di;
5587
5588         return iam_it_next(&it->oi_it);
5589 }
5590
5591 /**
5592  * Return pointer to the key under iterator.
5593  */
5594
5595 static struct dt_key *osd_it_iam_key(const struct lu_env *env,
5596                                  const struct dt_it *di)
5597 {
5598         struct osd_thread_info *oti = osd_oti_get(env);
5599         struct osd_it_iam      *it = (struct osd_it_iam *)di;
5600         struct osd_object      *obj = it->oi_obj;
5601         struct dt_key          *key;
5602
5603         key = (struct dt_key *)iam_it_key_get(&it->oi_it);
5604
5605         if (!IS_ERR(key) && fid_is_quota(lu_object_fid(&obj->oo_dt.do_lu))) {
5606                 /* swab quota uid/gid */
5607                 oti->oti_quota_id = le64_to_cpu(*((__u64 *)key));
5608                 key = (struct dt_key *)&oti->oti_quota_id;
5609         }
5610
5611         return key;
5612 }
5613
5614 /**
5615  * Return size of key under iterator (in bytes)
5616  */
5617
5618 static int osd_it_iam_key_size(const struct lu_env *env, const struct dt_it *di)
5619 {
5620         struct osd_it_iam *it = (struct osd_it_iam *)di;
5621
5622         return iam_it_key_size(&it->oi_it);
5623 }
5624
5625 static inline void
5626 osd_it_append_attrs(struct lu_dirent *ent, int len, __u16 type)
5627 {
5628         /* check if file type is required */
5629         if (ent->lde_attrs & LUDA_TYPE) {
5630                 struct luda_type *lt;
5631                 int align = sizeof(*lt) - 1;
5632
5633                 len = (len + align) & ~align;
5634                 lt = (struct luda_type *)(ent->lde_name + len);
5635                 lt->lt_type = cpu_to_le16(DTTOIF(type));
5636         }
5637
5638         ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
5639 }
5640
5641 /**
5642  * build lu direct from backend fs dirent.
5643  */
5644
5645 static inline void
5646 osd_it_pack_dirent(struct lu_dirent *ent, struct lu_fid *fid, __u64 offset,
5647                    char *name, __u16 namelen, __u16 type, __u32 attr)
5648 {
5649         ent->lde_attrs = attr | LUDA_FID;
5650         fid_cpu_to_le(&ent->lde_fid, fid);
5651
5652         ent->lde_hash = cpu_to_le64(offset);
5653         ent->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
5654
5655         strncpy(ent->lde_name, name, namelen);
5656         ent->lde_name[namelen] = '\0';
5657         ent->lde_namelen = cpu_to_le16(namelen);
5658
5659         /* append lustre attributes */
5660         osd_it_append_attrs(ent, namelen, type);
5661 }
5662
5663 /**
5664  * Return pointer to the record under iterator.
5665  */
5666 static int osd_it_iam_rec(const struct lu_env *env,
5667                           const struct dt_it *di,
5668                           struct dt_rec *dtrec, __u32 attr)
5669 {
5670         struct osd_it_iam      *it   = (struct osd_it_iam *)di;
5671         struct osd_thread_info *info = osd_oti_get(env);
5672         ENTRY;
5673
5674         if (S_ISDIR(it->oi_obj->oo_inode->i_mode)) {
5675                 const struct osd_fid_pack *rec;
5676                 struct lu_fid             *fid = &info->oti_fid;
5677                 struct lu_dirent          *lde = (struct lu_dirent *)dtrec;
5678                 char                      *name;
5679                 int                        namelen;
5680                 __u64                      hash;
5681                 int                        rc;
5682
5683                 name = (char *)iam_it_key_get(&it->oi_it);
5684                 if (IS_ERR(name))
5685                         RETURN(PTR_ERR(name));
5686
5687                 namelen = iam_it_key_size(&it->oi_it);
5688
5689                 rec = (const struct osd_fid_pack *)iam_it_rec_get(&it->oi_it);
5690                 if (IS_ERR(rec))
5691                         RETURN(PTR_ERR(rec));
5692
5693                 rc = osd_fid_unpack(fid, rec);
5694                 if (rc)
5695                         RETURN(rc);
5696
5697                 hash = iam_it_store(&it->oi_it);
5698
5699                 /* IAM does not store object type in IAM index (dir) */
5700                 osd_it_pack_dirent(lde, fid, hash, name, namelen,
5701                                    0, LUDA_FID);
5702         } else if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
5703                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
5704                            (struct iam_rec *)dtrec);
5705                 osd_quota_unpack(it->oi_obj, dtrec);
5706         } else {
5707                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
5708                            (struct iam_rec *)dtrec);
5709         }
5710
5711         RETURN(0);
5712 }
5713
5714 /**
5715  * Returns cookie for current Iterator position.
5716  */
5717 static __u64 osd_it_iam_store(const struct lu_env *env, const struct dt_it *di)
5718 {
5719         struct osd_it_iam *it = (struct osd_it_iam *)di;
5720
5721         return iam_it_store(&it->oi_it);
5722 }
5723
5724 /**
5725  * Restore iterator from cookie.
5726  *
5727  * \param  di      osd iterator
5728  * \param  hash    Iterator location cookie
5729  *
5730  * \retval +ve  di points to record with least key not larger than key.
5731  * \retval  0   di points to exact matched key
5732  * \retval -ve  failure
5733  */
5734
5735 static int osd_it_iam_load(const struct lu_env *env,
5736                            const struct dt_it *di, __u64 hash)
5737 {
5738         struct osd_it_iam *it = (struct osd_it_iam *)di;
5739
5740         return iam_it_load(&it->oi_it, hash);
5741 }
5742
5743 static const struct dt_index_operations osd_index_iam_ops = {
5744         .dio_lookup         = osd_index_iam_lookup,
5745         .dio_declare_insert = osd_index_declare_iam_insert,
5746         .dio_insert         = osd_index_iam_insert,
5747         .dio_declare_delete = osd_index_declare_iam_delete,
5748         .dio_delete         = osd_index_iam_delete,
5749         .dio_it     = {
5750                 .init     = osd_it_iam_init,
5751                 .fini     = osd_it_iam_fini,
5752                 .get      = osd_it_iam_get,
5753                 .put      = osd_it_iam_put,
5754                 .next     = osd_it_iam_next,
5755                 .key      = osd_it_iam_key,
5756                 .key_size = osd_it_iam_key_size,
5757                 .rec      = osd_it_iam_rec,
5758                 .store    = osd_it_iam_store,
5759                 .load     = osd_it_iam_load
5760         }
5761 };
5762
5763
5764 /**
5765  * Creates or initializes iterator context.
5766  *
5767  * \retval struct osd_it_ea, iterator structure on success
5768  *
5769  */
5770 static struct dt_it *osd_it_ea_init(const struct lu_env *env,
5771                                     struct dt_object *dt,
5772                                     __u32 attr)
5773 {
5774         struct osd_object       *obj  = osd_dt_obj(dt);
5775         struct osd_thread_info  *info = osd_oti_get(env);
5776         struct osd_it_ea        *oie;
5777         struct file             *file;
5778         struct lu_object        *lo   = &dt->do_lu;
5779         struct dentry           *obj_dentry;
5780         ENTRY;
5781
5782         if (!dt_object_exists(dt) || obj->oo_destroyed)
5783                 RETURN(ERR_PTR(-ENOENT));
5784
5785         OBD_SLAB_ALLOC_PTR_GFP(oie, osd_itea_cachep, GFP_NOFS);
5786         if (oie == NULL)
5787                 RETURN(ERR_PTR(-ENOMEM));
5788         obj_dentry = &oie->oie_dentry;
5789
5790         obj_dentry->d_inode = obj->oo_inode;
5791         obj_dentry->d_sb = osd_sb(osd_obj2dev(obj));
5792         obj_dentry->d_name.hash = 0;
5793
5794         oie->oie_rd_dirent       = 0;
5795         oie->oie_it_dirent       = 0;
5796         oie->oie_dirent          = NULL;
5797         if (unlikely(!info->oti_it_ea_buf_used)) {
5798                 oie->oie_buf = info->oti_it_ea_buf;
5799                 info->oti_it_ea_buf_used = 1;
5800         } else {
5801                 OBD_ALLOC(oie->oie_buf, OSD_IT_EA_BUFSIZE);
5802                 if (oie->oie_buf == NULL)
5803                         RETURN(ERR_PTR(-ENOMEM));
5804         }
5805         oie->oie_obj             = obj;
5806
5807         file = &oie->oie_file;
5808
5809         /* Only FMODE_64BITHASH or FMODE_32BITHASH should be set, NOT both. */
5810         if (attr & LUDA_64BITHASH)
5811                 file->f_mode    = FMODE_64BITHASH;
5812         else
5813                 file->f_mode    = FMODE_32BITHASH;
5814         file->f_path.dentry     = obj_dentry;
5815         file->f_mapping         = obj->oo_inode->i_mapping;
5816         file->f_op              = obj->oo_inode->i_fop;
5817         set_file_inode(file, obj->oo_inode);
5818
5819         lu_object_get(lo);
5820         RETURN((struct dt_it *) oie);
5821 }
5822
5823 /**
5824  * Destroy or finishes iterator context.
5825  *
5826  * \param di iterator structure to be destroyed
5827  */
5828 static void osd_it_ea_fini(const struct lu_env *env, struct dt_it *di)
5829 {
5830         struct osd_thread_info  *info = osd_oti_get(env);
5831         struct osd_it_ea        *oie    = (struct osd_it_ea *)di;
5832         struct osd_object       *obj    = oie->oie_obj;
5833         struct inode            *inode  = obj->oo_inode;
5834
5835         ENTRY;
5836         oie->oie_file.f_op->release(inode, &oie->oie_file);
5837         osd_object_put(env, obj);
5838         if (unlikely(oie->oie_buf != info->oti_it_ea_buf))
5839                 OBD_FREE(oie->oie_buf, OSD_IT_EA_BUFSIZE);
5840         else
5841                 info->oti_it_ea_buf_used = 0;
5842         OBD_SLAB_FREE_PTR(oie, osd_itea_cachep);
5843         EXIT;
5844 }
5845
5846 /**
5847  * It position the iterator at given key, so that next lookup continues from
5848  * that key Or it is similar to dio_it->load() but based on a key,
5849  * rather than file position.
5850  *
5851  * As a special convention, osd_it_ea_get(env, di, "") has to rewind iterator
5852  * to the beginning.
5853  *
5854  * TODO: Presently return +1 considering it is only used by mdd_dir_is_empty().
5855  */
5856 static int osd_it_ea_get(const struct lu_env *env,
5857                          struct dt_it *di, const struct dt_key *key)
5858 {
5859         struct osd_it_ea     *it   = (struct osd_it_ea *)di;
5860
5861         ENTRY;
5862         LASSERT(((const char *)key)[0] == '\0');
5863         it->oie_file.f_pos      = 0;
5864         it->oie_rd_dirent       = 0;
5865         it->oie_it_dirent       = 0;
5866         it->oie_dirent          = NULL;
5867
5868         RETURN(+1);
5869 }
5870
5871 /**
5872  * Does nothing
5873  */
5874 static void osd_it_ea_put(const struct lu_env *env, struct dt_it *di)
5875 {
5876 }
5877
5878 struct osd_filldir_cbs {
5879 #ifdef HAVE_DIR_CONTEXT
5880         struct dir_context ctx;
5881 #endif
5882         struct osd_it_ea  *it;
5883 };
5884 /**
5885  * It is called internally by ->readdir(). It fills the
5886  * iterator's in-memory data structure with required
5887  * information i.e. name, namelen, rec_size etc.
5888  *
5889  * \param buf in which information to be filled in.
5890  * \param name name of the file in given dir
5891  *
5892  * \retval 0 on success
5893  * \retval 1 on buffer full
5894  */
5895 #ifdef HAVE_FILLDIR_USE_CTX
5896 static int osd_ldiskfs_filldir(struct dir_context *buf,
5897 #else
5898 static int osd_ldiskfs_filldir(void *buf,
5899 #endif
5900                                const char *name, int namelen,
5901                                loff_t offset, __u64 ino, unsigned d_type)
5902 {
5903         struct osd_it_ea        *it   =
5904                 ((struct osd_filldir_cbs *)buf)->it;
5905         struct osd_object       *obj  = it->oie_obj;
5906         struct osd_it_ea_dirent *ent  = it->oie_dirent;
5907         struct lu_fid           *fid  = &ent->oied_fid;
5908         struct osd_fid_pack     *rec;
5909         ENTRY;
5910
5911         /* this should never happen */
5912         if (unlikely(namelen == 0 || namelen > LDISKFS_NAME_LEN)) {
5913                 CERROR("ldiskfs return invalid namelen %d\n", namelen);
5914                 RETURN(-EIO);
5915         }
5916
5917         if ((void *) ent - it->oie_buf + sizeof(*ent) + namelen >
5918             OSD_IT_EA_BUFSIZE)
5919                 RETURN(1);
5920
5921         /* "." is just the object itself. */
5922         if (namelen == 1 && name[0] == '.') {
5923                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
5924         } else if (d_type & LDISKFS_DIRENT_LUFID) {
5925                 rec = (struct osd_fid_pack*) (name + namelen + 1);
5926                 if (osd_fid_unpack(fid, rec) != 0)
5927                         fid_zero(fid);
5928         } else {
5929                 fid_zero(fid);
5930         }
5931         d_type &= ~LDISKFS_DIRENT_LUFID;
5932
5933         /* NOT export local root. */
5934         if (unlikely(osd_sb(osd_obj2dev(obj))->s_root->d_inode->i_ino == ino)) {
5935                 ino = obj->oo_inode->i_ino;
5936                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
5937         }
5938
5939         ent->oied_ino     = ino;
5940         ent->oied_off     = offset;
5941         ent->oied_namelen = namelen;
5942         ent->oied_type    = d_type;
5943
5944         memcpy(ent->oied_name, name, namelen);
5945
5946         it->oie_rd_dirent++;
5947         it->oie_dirent = (void *) ent + cfs_size_round(sizeof(*ent) + namelen);
5948         RETURN(0);
5949 }
5950
5951 /**
5952  * Calls ->readdir() to load a directory entry at a time
5953  * and stored it in iterator's in-memory data structure.
5954  *
5955  * \param di iterator's in memory structure
5956  *
5957  * \retval   0 on success
5958  * \retval -ve on error
5959  * \retval +1 reach the end of entry
5960  */
5961 static int osd_ldiskfs_it_fill(const struct lu_env *env,
5962                                const struct dt_it *di)
5963 {
5964         struct osd_it_ea   *it    = (struct osd_it_ea *)di;
5965         struct osd_object  *obj   = it->oie_obj;
5966         struct inode       *inode = obj->oo_inode;
5967         struct htree_lock  *hlock = NULL;
5968         struct file        *filp  = &it->oie_file;
5969         int                 rc = 0;
5970         struct osd_filldir_cbs buf = {
5971 #ifdef HAVE_DIR_CONTEXT
5972                 .ctx.actor = osd_ldiskfs_filldir,
5973 #endif
5974                 .it = it
5975         };
5976
5977         ENTRY;
5978         it->oie_dirent = it->oie_buf;
5979         it->oie_rd_dirent = 0;
5980
5981         if (obj->oo_hl_head != NULL) {
5982                 hlock = osd_oti_get(env)->oti_hlock;
5983                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
5984                                    inode, LDISKFS_HLOCK_READDIR);
5985         } else {
5986                 down_read(&obj->oo_ext_idx_sem);
5987         }
5988
5989 #ifdef HAVE_DIR_CONTEXT
5990         buf.ctx.pos = filp->f_pos;
5991         rc = inode->i_fop->iterate(filp, &buf.ctx);
5992         filp->f_pos = buf.ctx.pos;
5993 #else
5994         rc = inode->i_fop->readdir(filp, &buf, osd_ldiskfs_filldir);
5995 #endif
5996
5997         if (hlock != NULL)
5998                 ldiskfs_htree_unlock(hlock);
5999         else
6000                 up_read(&obj->oo_ext_idx_sem);
6001
6002         if (it->oie_rd_dirent == 0) {
6003                 /*If it does not get any dirent, it means it has been reached
6004                  *to the end of the dir */
6005                 it->oie_file.f_pos = ldiskfs_get_htree_eof(&it->oie_file);
6006                 if (rc == 0)
6007                         rc = 1;
6008         } else {
6009                 it->oie_dirent = it->oie_buf;
6010                 it->oie_it_dirent = 1;
6011         }
6012
6013         RETURN(rc);
6014 }
6015
6016 /**
6017  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
6018  * to load a directory entry at a time and stored it in
6019  * iterator's in-memory data structure.
6020  *
6021  * \param di iterator's in memory structure
6022  *
6023  * \retval +ve iterator reached to end
6024  * \retval   0 iterator not reached to end
6025  * \retval -ve on error
6026  */
6027 static int osd_it_ea_next(const struct lu_env *env, struct dt_it *di)
6028 {
6029         struct osd_it_ea *it = (struct osd_it_ea *)di;
6030         int rc;
6031
6032         ENTRY;
6033
6034         if (it->oie_it_dirent < it->oie_rd_dirent) {
6035                 it->oie_dirent =
6036                         (void *) it->oie_dirent +
6037                         cfs_size_round(sizeof(struct osd_it_ea_dirent) +
6038                                        it->oie_dirent->oied_namelen);
6039                 it->oie_it_dirent++;
6040                 RETURN(0);
6041         } else {
6042                 if (it->oie_file.f_pos == ldiskfs_get_htree_eof(&it->oie_file))
6043                         rc = +1;
6044                 else
6045                         rc = osd_ldiskfs_it_fill(env, di);
6046         }
6047
6048         RETURN(rc);
6049 }
6050
6051 /**
6052  * Returns the key at current position from iterator's in memory structure.
6053  *
6054  * \param di iterator's in memory structure
6055  *
6056  * \retval key i.e. struct dt_key on success
6057  */
6058 static struct dt_key *osd_it_ea_key(const struct lu_env *env,
6059                                     const struct dt_it *di)
6060 {
6061         struct osd_it_ea *it = (struct osd_it_ea *)di;
6062
6063         return (struct dt_key *)it->oie_dirent->oied_name;
6064 }
6065
6066 /**
6067  * Returns the key's size at current position from iterator's in memory structure.
6068  *
6069  * \param di iterator's in memory structure
6070  *
6071  * \retval key_size i.e. struct dt_key on success
6072  */
6073 static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
6074 {
6075         struct osd_it_ea *it = (struct osd_it_ea *)di;
6076
6077         return it->oie_dirent->oied_namelen;
6078 }
6079
6080 static inline bool osd_dotdot_has_space(struct ldiskfs_dir_entry_2 *de)
6081 {
6082         if (LDISKFS_DIR_REC_LEN(de) >=
6083             __LDISKFS_DIR_REC_LEN(2 + 1 + sizeof(struct osd_fid_pack)))
6084                 return true;
6085
6086         return false;
6087 }
6088
6089 static inline bool
6090 osd_dirent_has_space(struct ldiskfs_dir_entry_2 *de, __u16 namelen,
6091                      unsigned blocksize, bool dotdot)
6092 {
6093         if (dotdot)
6094                 return osd_dotdot_has_space(de);
6095
6096         if (ldiskfs_rec_len_from_disk(de->rec_len, blocksize) >=
6097             __LDISKFS_DIR_REC_LEN(namelen + 1 + sizeof(struct osd_fid_pack)))
6098                 return true;
6099
6100         return false;
6101 }
6102
6103 static int
6104 osd_dirent_reinsert(const struct lu_env *env, struct osd_device *dev,
6105                     handle_t *jh, struct dentry *dentry,
6106                     const struct lu_fid *fid, struct buffer_head *bh,
6107                     struct ldiskfs_dir_entry_2 *de, struct htree_lock *hlock,
6108                     bool dotdot)
6109 {
6110         struct inode                *dir        = dentry->d_parent->d_inode;
6111         struct inode                *inode      = dentry->d_inode;
6112         struct osd_fid_pack         *rec;
6113         struct ldiskfs_dentry_param *ldp;
6114         int                          namelen    = dentry->d_name.len;
6115         int                          rc;
6116         struct osd_thread_info     *info        = osd_oti_get(env);
6117         ENTRY;
6118
6119         if (!LDISKFS_HAS_INCOMPAT_FEATURE(inode->i_sb,
6120                                           LDISKFS_FEATURE_INCOMPAT_DIRDATA))
6121                 RETURN(0);
6122
6123         /* There is enough space to hold the FID-in-dirent. */
6124         if (osd_dirent_has_space(de, namelen, dir->i_sb->s_blocksize, dotdot)) {
6125                 rc = ldiskfs_journal_get_write_access(jh, bh);
6126                 if (rc != 0)
6127                         RETURN(rc);
6128
6129                 de->name[namelen] = 0;
6130                 rec = (struct osd_fid_pack *)(de->name + namelen + 1);
6131                 rec->fp_len = sizeof(struct lu_fid) + 1;
6132                 fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
6133                 de->file_type |= LDISKFS_DIRENT_LUFID;
6134                 rc = ldiskfs_handle_dirty_metadata(jh, NULL, bh);
6135
6136                 RETURN(rc);
6137         }
6138
6139         LASSERT(!dotdot);
6140
6141         rc = ldiskfs_delete_entry(jh, dir, de, bh);
6142         if (rc != 0)
6143                 RETURN(rc);
6144
6145         ldp = (struct ldiskfs_dentry_param *)osd_oti_get(env)->oti_ldp;
6146         osd_get_ldiskfs_dirent_param(ldp, fid);
6147         dentry->d_fsdata = (void *)ldp;
6148         ll_vfs_dq_init(dir);
6149         rc = osd_ldiskfs_add_entry(info, dev, jh, dentry, inode, hlock);
6150         /* It is too bad, we cannot reinsert the name entry back.
6151          * That means we lose it! */
6152         if (rc != 0)
6153                 CDEBUG(D_LFSCK, "%s: fail to reinsert the dirent, "
6154                        "dir = %lu/%u, name = %.*s, "DFID": rc = %d\n",
6155                        osd_ino2name(inode),
6156                        dir->i_ino, dir->i_generation, namelen,
6157                        dentry->d_name.name, PFID(fid), rc);
6158
6159         RETURN(rc);
6160 }
6161
6162 static int
6163 osd_dirent_check_repair(const struct lu_env *env, struct osd_object *obj,
6164                         struct osd_it_ea *it, struct lu_fid *fid,
6165                         struct osd_inode_id *id, __u32 *attr)
6166 {
6167         struct osd_thread_info     *info        = osd_oti_get(env);
6168         struct lustre_mdt_attrs    *lma         = &info->oti_ost_attrs.loa_lma;
6169         struct osd_device          *dev         = osd_obj2dev(obj);
6170         struct super_block         *sb          = osd_sb(dev);
6171         const char                 *devname     = osd_name(dev);
6172         struct osd_it_ea_dirent    *ent         = it->oie_dirent;
6173         struct inode               *dir         = obj->oo_inode;
6174         struct htree_lock          *hlock       = NULL;
6175         struct buffer_head         *bh          = NULL;
6176         handle_t                   *jh          = NULL;
6177         struct ldiskfs_dir_entry_2 *de;
6178         struct dentry              *dentry;
6179         struct inode               *inode;
6180         const struct lu_fid *pfid = lu_object_fid(&obj->oo_dt.do_lu);
6181         int                         credits;
6182         int                         rc;
6183         bool                        dotdot      = false;
6184         bool                        dirty       = false;
6185         ENTRY;
6186
6187         if (ent->oied_name[0] == '.') {
6188                 if (ent->oied_namelen == 1)
6189                         RETURN(0);
6190
6191                 if (ent->oied_namelen == 2 && ent->oied_name[1] == '.')
6192                         dotdot = true;
6193         }
6194
6195         osd_id_gen(id, ent->oied_ino, OSD_OII_NOGEN);
6196         inode = osd_iget(info, dev, id);
6197         if (IS_ERR(inode)) {
6198                 rc = PTR_ERR(inode);
6199                 if (rc == -ENOENT || rc == -ESTALE) {
6200                         /* Maybe dangling name entry, or
6201                          * corrupted directory entry. */
6202                         *attr |= LUDA_UNKNOWN;
6203                         rc = 0;
6204                 } else {
6205                         CDEBUG(D_LFSCK, "%s: fail to iget() for dirent "
6206                                "check_repair, dir = %lu/%u, name = %.*s, "
6207                                "ino = %llu, rc = %d\n",
6208                                devname, dir->i_ino, dir->i_generation,
6209                                ent->oied_namelen, ent->oied_name,
6210                                ent->oied_ino, rc);
6211                 }
6212
6213                 RETURN(rc);
6214         }
6215
6216         dentry = osd_child_dentry_by_inode(env, dir, ent->oied_name,
6217                                            ent->oied_namelen);
6218         rc = osd_get_lma(info, inode, dentry, &info->oti_ost_attrs);
6219         if (rc == -ENODATA || !fid_is_sane(&lma->lma_self_fid))
6220                 lma = NULL;
6221         else if (rc != 0)
6222                 GOTO(out, rc);
6223
6224         /* We need to ensure that the name entry is still valid.
6225          * Because it may be removed or renamed by other already.
6226          *
6227          * The unlink or rename operation will start journal before PDO lock,
6228          * so to avoid deadlock, here we need to start journal handle before
6229          * related PDO lock also. But because we do not know whether there
6230          * will be something to be repaired before PDO lock, we just start
6231          * journal without conditions.
6232          *
6233          * We may need to remove the name entry firstly, then insert back.
6234          * One credit is for user quota file update.
6235          * One credit is for group quota file update.
6236          * Two credits are for dirty inode. */
6237         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE] +
6238                   osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1 + 1 + 2;
6239
6240         if (dev->od_dirent_journal != 0) {
6241
6242 again:
6243                 jh = osd_journal_start_sb(sb, LDISKFS_HT_MISC, credits);
6244                 if (IS_ERR(jh)) {
6245                         rc = PTR_ERR(jh);
6246                         CDEBUG(D_LFSCK, "%s: fail to start trans for dirent "
6247                                "check_repair, dir = %lu/%u, credits = %d, "
6248                                "name = %.*s, ino = %llu: rc = %d\n",
6249                                devname, dir->i_ino, dir->i_generation, credits,
6250                                ent->oied_namelen, ent->oied_name,
6251                                ent->oied_ino, rc);
6252
6253                         GOTO(out_inode, rc);
6254                 }
6255
6256                 if (obj->oo_hl_head != NULL) {
6257                         hlock = osd_oti_get(env)->oti_hlock;
6258                         /* "0" means exclusive lock for the whole directory.
6259                          * We need to prevent others access such name entry
6260                          * during the delete + insert. Neither HLOCK_ADD nor
6261                          * HLOCK_DEL cannot guarantee the atomicity. */
6262                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir, 0);
6263                 } else {
6264                         down_write(&obj->oo_ext_idx_sem);
6265                 }
6266         } else {
6267                 if (obj->oo_hl_head != NULL) {
6268                         hlock = osd_oti_get(env)->oti_hlock;
6269                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir,
6270                                            LDISKFS_HLOCK_LOOKUP);
6271                 } else {
6272                         down_read(&obj->oo_ext_idx_sem);
6273                 }
6274         }
6275
6276         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
6277         if (IS_ERR(bh) || le32_to_cpu(de->inode) != inode->i_ino) {
6278                 *attr |= LUDA_IGNORE;
6279
6280                 GOTO(out, rc = 0);
6281         }
6282
6283         /* For dotdot entry, if there is not enough space to hold the
6284          * FID-in-dirent, just keep them there. It only happens when the
6285          * device upgraded from 1.8 or restored from MDT file-level backup.
6286          * For the whole directory, only dotdot entry have no FID-in-dirent
6287          * and needs to get FID from LMA when readdir, it will not affect the
6288          * performance much. */
6289         if (dotdot && !osd_dotdot_has_space(de)) {
6290                 *attr |= LUDA_UNKNOWN;
6291
6292                 GOTO(out, rc = 0);
6293         }
6294
6295         if (lma != NULL) {
6296                 if (lu_fid_eq(fid, &lma->lma_self_fid))
6297                         GOTO(out, rc = 0);
6298
6299                 if (unlikely(lma->lma_compat & LMAC_NOT_IN_OI)) {
6300                         struct lu_fid *tfid = &lma->lma_self_fid;
6301
6302                         if (likely(dotdot &&
6303                                    fid_seq(tfid) == FID_SEQ_LOCAL_FILE &&
6304                                    fid_oid(tfid) == REMOTE_PARENT_DIR_OID)) {
6305                                 /* It must be REMOTE_PARENT_DIR and as the
6306                                  * 'dotdot' entry of remote directory */
6307                                 *attr |= LUDA_IGNORE;
6308                         } else {
6309                                 CDEBUG(D_LFSCK, "%s: expect remote agent "
6310                                        "parent directory, but got %.*s under "
6311                                        "dir = %lu/%u with the FID "DFID"\n",
6312                                        devname, ent->oied_namelen,
6313                                        ent->oied_name, dir->i_ino,
6314                                        dir->i_generation, PFID(tfid));
6315
6316                                 *attr |= LUDA_UNKNOWN;
6317                         }
6318
6319                         GOTO(out, rc = 0);
6320                 }
6321         }
6322
6323         if (!fid_is_zero(fid)) {
6324                 rc = osd_verify_ent_by_linkea(env, inode, pfid, ent->oied_name,
6325                                               ent->oied_namelen);
6326                 if (rc == -ENOENT ||
6327                     (rc == -ENODATA &&
6328                      !(dev->od_scrub.os_file.sf_flags & SF_UPGRADE))) {
6329                         /* linkEA does not recognize the dirent entry,
6330                          * it may because the dirent entry corruption
6331                          * and points to other's inode. */
6332                         CDEBUG(D_LFSCK, "%s: the target inode does not "
6333                                "recognize the dirent, dir = %lu/%u, "
6334                                " name = %.*s, ino = %llu, "
6335                                DFID": rc = %d\n", devname, dir->i_ino,
6336                                dir->i_generation, ent->oied_namelen,
6337                                ent->oied_name, ent->oied_ino, PFID(fid), rc);
6338                         *attr |= LUDA_UNKNOWN;
6339
6340                         GOTO(out, rc = 0);
6341                 }
6342
6343                 if (rc && rc != -ENODATA) {
6344                         CDEBUG(D_LFSCK, "%s: fail to verify FID in the dirent, "
6345                                "dir = %lu/%u, name = %.*s, ino = %llu, "
6346                                DFID": rc = %d\n", devname, dir->i_ino,
6347                                dir->i_generation, ent->oied_namelen,
6348                                ent->oied_name, ent->oied_ino, PFID(fid), rc);
6349                         *attr |= LUDA_UNKNOWN;
6350
6351                         GOTO(out, rc = 0);
6352                 }
6353         }
6354
6355         if (lma != NULL) {
6356                 /* linkEA recognizes the dirent entry, the FID-in-LMA is
6357                  * valid, trusted, in spite of fid_is_sane(fid) or not. */
6358                 if (*attr & LUDA_VERIFY_DRYRUN) {
6359                         *fid = lma->lma_self_fid;
6360                         *attr |= LUDA_REPAIR;
6361
6362                         GOTO(out, rc = 0);
6363                 }
6364
6365                 if (jh == NULL) {
6366                         brelse(bh);
6367                         dev->od_dirent_journal = 1;
6368                         if (hlock != NULL) {
6369                                 ldiskfs_htree_unlock(hlock);
6370                                 hlock = NULL;
6371                         } else {
6372                                 up_read(&obj->oo_ext_idx_sem);
6373                         }
6374
6375                         goto again;
6376                 }
6377
6378                 *fid = lma->lma_self_fid;
6379                 dirty = true;
6380                 /* Update or append the FID-in-dirent. */
6381                 rc = osd_dirent_reinsert(env, dev, jh, dentry, fid,
6382                                          bh, de, hlock, dotdot);
6383                 if (rc == 0)
6384                         *attr |= LUDA_REPAIR;
6385                 else
6386                         CDEBUG(D_LFSCK, "%s: fail to re-insert FID after "
6387                                "the dirent, dir = %lu/%u, name = %.*s, "
6388                                "ino = %llu, "DFID": rc = %d\n",
6389                                devname, dir->i_ino, dir->i_generation,
6390                                ent->oied_namelen, ent->oied_name,
6391                                ent->oied_ino, PFID(fid), rc);
6392         } else {
6393                 /* lma is NULL, trust the FID-in-dirent if it is valid. */
6394                 if (*attr & LUDA_VERIFY_DRYRUN) {
6395                         if (fid_is_sane(fid)) {
6396                                 *attr |= LUDA_REPAIR;
6397                         } else if (dev->od_index == 0) {
6398                                 lu_igif_build(fid, inode->i_ino,
6399                                               inode->i_generation);
6400                                 *attr |= LUDA_UPGRADE;
6401                         }
6402
6403                         GOTO(out, rc = 0);
6404                 }
6405
6406                 if (jh == NULL) {
6407                         brelse(bh);
6408                         dev->od_dirent_journal = 1;
6409                         if (hlock != NULL) {
6410                                 ldiskfs_htree_unlock(hlock);
6411                                 hlock = NULL;
6412                         } else {
6413                                 up_read(&obj->oo_ext_idx_sem);
6414                         }
6415
6416                         goto again;
6417                 }
6418
6419                 dirty = true;
6420                 if (unlikely(fid_is_sane(fid))) {
6421                         /* FID-in-dirent exists, but FID-in-LMA is lost.
6422                          * Trust the FID-in-dirent, and add FID-in-LMA. */
6423                         rc = osd_ea_fid_set(info, inode, fid, 0, 0);
6424                         if (rc == 0)
6425                                 *attr |= LUDA_REPAIR;
6426                         else
6427                                 CDEBUG(D_LFSCK, "%s: fail to set LMA for "
6428                                        "update dirent, dir = %lu/%u, "
6429                                        "name = %.*s, ino = %llu, "
6430                                        DFID": rc = %d\n",
6431                                        devname, dir->i_ino, dir->i_generation,
6432                                        ent->oied_namelen, ent->oied_name,
6433                                        ent->oied_ino, PFID(fid), rc);
6434                 } else if (dev->od_index == 0) {
6435                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
6436                         /* It is probably IGIF object. Only aappend the
6437                          * FID-in-dirent. OI scrub will process FID-in-LMA. */
6438                         rc = osd_dirent_reinsert(env, dev, jh, dentry, fid,
6439                                                  bh, de, hlock, dotdot);
6440                         if (rc == 0)
6441                                 *attr |= LUDA_UPGRADE;
6442                         else
6443                                 CDEBUG(D_LFSCK, "%s: fail to append IGIF "
6444                                        "after the dirent, dir = %lu/%u, "
6445                                        "name = %.*s, ino = %llu, "
6446                                        DFID": rc = %d\n",
6447                                        devname, dir->i_ino, dir->i_generation,
6448                                        ent->oied_namelen, ent->oied_name,
6449                                        ent->oied_ino, PFID(fid), rc);
6450                 }
6451         }
6452
6453         GOTO(out, rc);
6454
6455 out:
6456         if (!IS_ERR(bh))
6457                 brelse(bh);
6458         if (hlock != NULL) {
6459                 ldiskfs_htree_unlock(hlock);
6460         } else {
6461                 if (dev->od_dirent_journal != 0)
6462                         up_write(&obj->oo_ext_idx_sem);
6463                 else
6464                         up_read(&obj->oo_ext_idx_sem);
6465         }
6466
6467         if (jh != NULL)
6468                 ldiskfs_journal_stop(jh);
6469
6470 out_inode:
6471         iput(inode);
6472         if (rc >= 0 && !dirty)
6473                 dev->od_dirent_journal = 0;
6474
6475         return rc;
6476 }
6477
6478 /**
6479  * Returns the value at current position from iterator's in memory structure.
6480  *
6481  * \param di struct osd_it_ea, iterator's in memory structure
6482  * \param attr attr requested for dirent.
6483  * \param lde lustre dirent
6484  *
6485  * \retval   0 no error and \param lde has correct lustre dirent.
6486  * \retval -ve on error
6487  */
6488 static inline int osd_it_ea_rec(const struct lu_env *env,
6489                                 const struct dt_it *di,
6490                                 struct dt_rec *dtrec, __u32 attr)
6491 {
6492         struct osd_it_ea       *it    = (struct osd_it_ea *)di;
6493         struct osd_object      *obj   = it->oie_obj;
6494         struct osd_device      *dev   = osd_obj2dev(obj);
6495         struct osd_thread_info *oti   = osd_oti_get(env);
6496         struct osd_inode_id    *id    = &oti->oti_id;
6497         struct lu_fid          *fid   = &it->oie_dirent->oied_fid;
6498         struct lu_dirent       *lde   = (struct lu_dirent *)dtrec;
6499         __u32                   ino   = it->oie_dirent->oied_ino;
6500         int                     rc    = 0;
6501         ENTRY;
6502
6503         LASSERT(obj->oo_inode != dev->od_mdt_map->omm_remote_parent->d_inode);
6504
6505         if (attr & LUDA_VERIFY) {
6506                 if (unlikely(ino == osd_remote_parent_ino(dev))) {
6507                         attr |= LUDA_IGNORE;
6508                         /* If the parent is on remote MDT, and there
6509                          * is no FID-in-dirent, then we have to get
6510                          * the parent FID from the linkEA.  */
6511                         if (!fid_is_sane(fid) &&
6512                             it->oie_dirent->oied_namelen == 2 &&
6513                             it->oie_dirent->oied_name[0] == '.' &&
6514                             it->oie_dirent->oied_name[1] == '.')
6515                                 osd_get_pfid_from_linkea(env, obj, fid);
6516                 } else {
6517                         rc = osd_dirent_check_repair(env, obj, it, fid, id,
6518                                                      &attr);
6519                 }
6520
6521                 if (!fid_is_sane(fid))
6522                         attr |= LUDA_UNKNOWN;
6523         } else {
6524                 attr &= ~LU_DIRENT_ATTRS_MASK;
6525                 if (!fid_is_sane(fid)) {
6526                         bool is_dotdot = false;
6527                         if (it->oie_dirent->oied_namelen == 2 &&
6528                             it->oie_dirent->oied_name[0] == '.' &&
6529                             it->oie_dirent->oied_name[1] == '.')
6530                                 is_dotdot = true;
6531                         /* If the parent is on remote MDT, and there
6532                          * is no FID-in-dirent, then we have to get
6533                          * the parent FID from the linkEA.  */
6534                         if (ino == osd_remote_parent_ino(dev) && is_dotdot) {
6535                                 rc = osd_get_pfid_from_linkea(env, obj, fid);
6536                         } else {
6537                                 if (is_dotdot == false &&
6538                                     OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP))
6539                                         RETURN(-ENOENT);
6540
6541                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
6542                         }
6543                 } else {
6544                         osd_id_gen(id, ino, OSD_OII_NOGEN);
6545                 }
6546         }
6547
6548         /* Pack the entry anyway, at least the offset is right. */
6549         osd_it_pack_dirent(lde, fid, it->oie_dirent->oied_off,
6550                            it->oie_dirent->oied_name,
6551                            it->oie_dirent->oied_namelen,
6552                            it->oie_dirent->oied_type, attr);
6553
6554         if (rc < 0)
6555                 RETURN(rc);
6556
6557         if (osd_remote_fid(env, dev, fid))
6558                 RETURN(0);
6559
6560         if (likely(!(attr & (LUDA_IGNORE | LUDA_UNKNOWN)) && rc == 0))
6561                 osd_add_oi_cache(oti, dev, id, fid);
6562
6563         RETURN(rc > 0 ? 0 : rc);
6564 }
6565
6566 /**
6567  * Returns the record size size at current position.
6568  *
6569  * This function will return record(lu_dirent) size in bytes.
6570  *
6571  * \param[in] env       execution environment
6572  * \param[in] di        iterator's in memory structure
6573  * \param[in] attr      attribute of the entry, only requires LUDA_TYPE to
6574  *                      calculate the lu_dirent size.
6575  *
6576  * \retval      record size(in bytes & in memory) of the current lu_dirent
6577  *              entry.
6578  */
6579 static int osd_it_ea_rec_size(const struct lu_env *env, const struct dt_it *di,
6580                               __u32 attr)
6581 {
6582         struct osd_it_ea *it = (struct osd_it_ea *)di;
6583
6584         return lu_dirent_calc_size(it->oie_dirent->oied_namelen, attr);
6585 }
6586
6587 /**
6588  * Returns a cookie for current position of the iterator head, so that
6589  * user can use this cookie to load/start the iterator next time.
6590  *
6591  * \param di iterator's in memory structure
6592  *
6593  * \retval cookie for current position, on success
6594  */
6595 static __u64 osd_it_ea_store(const struct lu_env *env, const struct dt_it *di)
6596 {
6597         struct osd_it_ea *it = (struct osd_it_ea *)di;
6598
6599         return it->oie_dirent->oied_off;
6600 }
6601
6602 /**
6603  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
6604  * to load a directory entry at a time and stored it i inn,
6605  * in iterator's in-memory data structure.
6606  *
6607  * \param di struct osd_it_ea, iterator's in memory structure
6608  *
6609  * \retval +ve on success
6610  * \retval -ve on error
6611  */
6612 static int osd_it_ea_load(const struct lu_env *env,
6613                           const struct dt_it *di, __u64 hash)
6614 {
6615         struct osd_it_ea *it = (struct osd_it_ea *)di;
6616         int rc;
6617
6618         ENTRY;
6619         it->oie_file.f_pos = hash;
6620
6621         rc =  osd_ldiskfs_it_fill(env, di);
6622         if (rc > 0)
6623                 rc = -ENODATA;
6624
6625         if (rc == 0)
6626                 rc = +1;
6627
6628         RETURN(rc);
6629 }
6630
6631 /**
6632  * Index lookup function for interoperability mode (b11826).
6633  *
6634  * \param key,  key i.e. file name to be searched
6635  *
6636  * \retval +ve, on success
6637  * \retval -ve, on error
6638  */
6639 static int osd_index_ea_lookup(const struct lu_env *env, struct dt_object *dt,
6640                                struct dt_rec *rec, const struct dt_key *key)
6641 {
6642         struct osd_object *obj = osd_dt_obj(dt);
6643         int rc = 0;
6644
6645         ENTRY;
6646
6647         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
6648         LINVRNT(osd_invariant(obj));
6649
6650         rc = osd_ea_lookup_rec(env, obj, rec, key);
6651         if (rc == 0)
6652                 rc = +1;
6653         RETURN(rc);
6654 }
6655
6656 /**
6657  * Index and Iterator operations for interoperability
6658  * mode (i.e. to run 2.0 mds on 1.8 disk) (b11826)
6659  */
6660 static const struct dt_index_operations osd_index_ea_ops = {
6661         .dio_lookup         = osd_index_ea_lookup,
6662         .dio_declare_insert = osd_index_declare_ea_insert,
6663         .dio_insert         = osd_index_ea_insert,
6664         .dio_declare_delete = osd_index_declare_ea_delete,
6665         .dio_delete         = osd_index_ea_delete,
6666         .dio_it     = {
6667                 .init     = osd_it_ea_init,
6668                 .fini     = osd_it_ea_fini,
6669                 .get      = osd_it_ea_get,
6670                 .put      = osd_it_ea_put,
6671                 .next     = osd_it_ea_next,
6672                 .key      = osd_it_ea_key,
6673                 .key_size = osd_it_ea_key_size,
6674                 .rec      = osd_it_ea_rec,
6675                 .rec_size = osd_it_ea_rec_size,
6676                 .store    = osd_it_ea_store,
6677                 .load     = osd_it_ea_load
6678         }
6679 };
6680
6681 static void *osd_key_init(const struct lu_context *ctx,
6682                           struct lu_context_key *key)
6683 {
6684         struct osd_thread_info *info;
6685
6686         OBD_ALLOC_PTR(info);
6687         if (info == NULL)
6688                 return ERR_PTR(-ENOMEM);
6689
6690         OBD_ALLOC(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
6691         if (info->oti_it_ea_buf == NULL)
6692                 goto out_free_info;
6693
6694         info->oti_env = container_of(ctx, struct lu_env, le_ctx);
6695
6696         info->oti_hlock = ldiskfs_htree_lock_alloc();
6697         if (info->oti_hlock == NULL)
6698                 goto out_free_ea;
6699
6700         return info;
6701
6702  out_free_ea:
6703         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
6704  out_free_info:
6705         OBD_FREE_PTR(info);
6706         return ERR_PTR(-ENOMEM);
6707 }
6708
6709 static void osd_key_fini(const struct lu_context *ctx,
6710                          struct lu_context_key *key, void* data)
6711 {
6712         struct osd_thread_info *info = data;
6713         struct ldiskfs_inode_info *lli = LDISKFS_I(info->oti_inode);
6714         struct osd_idmap_cache  *idc = info->oti_ins_cache;
6715
6716         if (info->oti_inode != NULL)
6717                 OBD_FREE_PTR(lli);
6718         if (info->oti_hlock != NULL)
6719                 ldiskfs_htree_lock_free(info->oti_hlock);
6720         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
6721         lu_buf_free(&info->oti_iobuf.dr_pg_buf);
6722         lu_buf_free(&info->oti_iobuf.dr_bl_buf);
6723         lu_buf_free(&info->oti_big_buf);
6724         if (idc != NULL) {
6725                 LASSERT(info->oti_ins_cache_size > 0);
6726                 OBD_FREE(idc, sizeof(*idc) * info->oti_ins_cache_size);
6727                 info->oti_ins_cache = NULL;
6728                 info->oti_ins_cache_size = 0;
6729         }
6730         OBD_FREE_PTR(info);
6731 }
6732
6733 static void osd_key_exit(const struct lu_context *ctx,
6734                          struct lu_context_key *key, void *data)
6735 {
6736         struct osd_thread_info *info = data;
6737
6738         LASSERT(info->oti_r_locks == 0);
6739         LASSERT(info->oti_w_locks == 0);
6740         LASSERT(info->oti_txns    == 0);
6741 }
6742
6743 /* type constructor/destructor: osd_type_init, osd_type_fini */
6744 LU_TYPE_INIT_FINI(osd, &osd_key);
6745
6746 struct lu_context_key osd_key = {
6747         .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL,
6748         .lct_init = osd_key_init,
6749         .lct_fini = osd_key_fini,
6750         .lct_exit = osd_key_exit
6751 };
6752
6753
6754 static int osd_device_init(const struct lu_env *env, struct lu_device *d,
6755                            const char *name, struct lu_device *next)
6756 {
6757         struct osd_device *osd = osd_dev(d);
6758
6759         if (strlcpy(osd->od_svname, name, sizeof(osd->od_svname))
6760             >= sizeof(osd->od_svname))
6761                 return -E2BIG;
6762         return osd_procfs_init(osd, name);
6763 }
6764
6765 static int osd_fid_init(const struct lu_env *env, struct osd_device *osd)
6766 {
6767         struct seq_server_site  *ss = osd_seq_site(osd);
6768         int                     rc;
6769         ENTRY;
6770
6771         if (osd->od_is_ost || osd->od_cl_seq != NULL)
6772                 RETURN(0);
6773
6774         if (unlikely(ss == NULL))
6775                 RETURN(-ENODEV);
6776
6777         OBD_ALLOC_PTR(osd->od_cl_seq);
6778         if (osd->od_cl_seq == NULL)
6779                 RETURN(-ENOMEM);
6780
6781         rc = seq_client_init(osd->od_cl_seq, NULL, LUSTRE_SEQ_METADATA,
6782                              osd->od_svname, ss->ss_server_seq);
6783         if (rc != 0) {
6784                 OBD_FREE_PTR(osd->od_cl_seq);
6785                 osd->od_cl_seq = NULL;
6786                 RETURN(rc);
6787         }
6788
6789         if (ss->ss_node_id == 0) {
6790                 /* If the OSD on the sequence controller(MDT0), then allocate
6791                  * sequence here, otherwise allocate sequence after connected
6792                  * to MDT0 (see mdt_register_lwp_callback()). */
6793                 rc = seq_server_alloc_meta(osd->od_cl_seq->lcs_srv,
6794                                    &osd->od_cl_seq->lcs_space, env);
6795         }
6796
6797         RETURN(rc);
6798 }
6799
6800 static void osd_fid_fini(const struct lu_env *env, struct osd_device *osd)
6801 {
6802         if (osd->od_cl_seq == NULL)
6803                 return;
6804
6805         seq_client_fini(osd->od_cl_seq);
6806         OBD_FREE_PTR(osd->od_cl_seq);
6807         osd->od_cl_seq = NULL;
6808 }
6809
6810 static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
6811 {
6812         ENTRY;
6813
6814         /* shutdown quota slave instance associated with the device */
6815         if (o->od_quota_slave != NULL) {
6816                 qsd_fini(env, o->od_quota_slave);
6817                 o->od_quota_slave = NULL;
6818         }
6819
6820         osd_fid_fini(env, o);
6821
6822         RETURN(0);
6823 }
6824
6825 static void osd_umount(const struct lu_env *env, struct osd_device *o)
6826 {
6827         ENTRY;
6828
6829         if (o->od_mnt != NULL) {
6830                 shrink_dcache_sb(osd_sb(o));
6831                 osd_sync(env, &o->od_dt_dev);
6832
6833                 mntput(o->od_mnt);
6834                 o->od_mnt = NULL;
6835         }
6836
6837         EXIT;
6838 }
6839
6840 static int osd_mount(const struct lu_env *env,
6841                      struct osd_device *o, struct lustre_cfg *cfg)
6842 {
6843         const char              *name  = lustre_cfg_string(cfg, 0);
6844         const char              *dev  = lustre_cfg_string(cfg, 1);
6845         const char              *opts;
6846         unsigned long            page, s_flags, lmd_flags = 0;
6847         struct page             *__page;
6848         struct file_system_type *type;
6849         char                    *options = NULL;
6850         char                    *str;
6851         struct osd_thread_info  *info = osd_oti_get(env);
6852         struct lu_fid           *fid = &info->oti_fid;
6853         struct inode            *inode;
6854         int                      rc = 0, force_over_512tb = 0;
6855         ENTRY;
6856
6857         if (o->od_mnt != NULL)
6858                 RETURN(0);
6859
6860         if (strlen(dev) >= sizeof(o->od_mntdev))
6861                 RETURN(-E2BIG);
6862         strcpy(o->od_mntdev, dev);
6863
6864         str = lustre_cfg_string(cfg, 2);
6865         s_flags = simple_strtoul(str, NULL, 0);
6866         str = strstr(str, ":");
6867         if (str)
6868                 lmd_flags = simple_strtoul(str + 1, NULL, 0);
6869         opts = lustre_cfg_string(cfg, 3);
6870 #ifdef __BIG_ENDIAN
6871         if (opts == NULL || strstr(opts, "bigendian_extents") == NULL) {
6872                 CERROR("%s: device %s extents feature is not guaranteed to "
6873                        "work on big-endian systems. Use \"bigendian_extents\" "
6874                        "mount option to override.\n", name, dev);
6875                 RETURN(-EINVAL);
6876         }
6877 #endif
6878 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
6879         if (opts != NULL && strstr(opts, "force_over_128tb") != NULL) {
6880                 CWARN("force_over_128tb option is deprecated. "
6881                       "Filesystems less than 512TB can be created without any "
6882                       "force options. Use force_over_512tb option for "
6883                       "filesystems greater than 512TB.\n");
6884         }
6885 #endif
6886 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 1, 53, 0)
6887         if (opts != NULL && strstr(opts, "force_over_256tb") != NULL) {
6888                 CWARN("force_over_256tb option is deprecated. "
6889                       "Filesystems less than 512TB can be created without any "
6890                       "force options. Use force_over_512tb option for "
6891                       "filesystems greater than 512TB.\n");
6892         }
6893 #endif
6894
6895         if (opts != NULL && strstr(opts, "force_over_512tb") != NULL)
6896                 force_over_512tb = 1;
6897
6898         __page = alloc_page(GFP_KERNEL);
6899         if (__page == NULL)
6900                 GOTO(out, rc = -ENOMEM);
6901         page = (unsigned long)page_address(__page);
6902         options = (char *)page;
6903         *options = '\0';
6904         if (opts != NULL) {
6905                 /* strip out the options for back compatiblity */
6906                 static char *sout[] = {
6907                         "mballoc",
6908                         "iopen",
6909                         "noiopen",
6910                         "iopen_nopriv",
6911                         "extents",
6912                         "noextents",
6913                         /* strip out option we processed in osd */
6914                         "bigendian_extents",
6915                         "force_over_128tb",
6916                         "force_over_256tb",
6917                         "force_over_512tb",
6918                         NULL
6919                 };
6920                 strcat(options, opts);
6921                 for (rc = 0, str = options; sout[rc]; ) {
6922                         char *op = strstr(str, sout[rc]);
6923                         if (op == NULL) {
6924                                 rc++;
6925                                 str = options;
6926                                 continue;
6927                         }
6928                         if (op == options || *(op - 1) == ',') {
6929                                 str = op + strlen(sout[rc]);
6930                                 if (*str == ',' || *str == '\0') {
6931                                         *str == ',' ? str++ : str;
6932                                         memmove(op, str, strlen(str) + 1);
6933                                 }
6934                         }
6935                         for (str = op; *str != ',' && *str != '\0'; str++)
6936                                 ;
6937                 }
6938         } else {
6939                 strncat(options, "user_xattr,acl", 14);
6940         }
6941
6942         /* Glom up mount options */
6943         if (*options != '\0')
6944                 strcat(options, ",");
6945         strlcat(options, "no_mbcache,nodelalloc", PAGE_SIZE);
6946
6947         type = get_fs_type("ldiskfs");
6948         if (!type) {
6949                 CERROR("%s: cannot find ldiskfs module\n", name);
6950                 GOTO(out, rc = -ENODEV);
6951         }
6952
6953         o->od_mnt = vfs_kern_mount(type, s_flags, dev, options);
6954         module_put(type->owner);
6955
6956         if (IS_ERR(o->od_mnt)) {
6957                 rc = PTR_ERR(o->od_mnt);
6958                 o->od_mnt = NULL;
6959                 CERROR("%s: can't mount %s: %d\n", name, dev, rc);
6960                 GOTO(out, rc);
6961         }
6962
6963         if (ldiskfs_blocks_count(LDISKFS_SB(osd_sb(o))->s_es) <<
6964                                  osd_sb(o)->s_blocksize_bits > 512ULL << 40 &&
6965                                  force_over_512tb == 0) {
6966                 CERROR("%s: device %s LDISKFS does not support filesystems "
6967                        "greater than 512TB and can cause data corruption. "
6968                        "Use \"force_over_512tb\" mount option to override.\n",
6969                        name, dev);
6970                 GOTO(out_mnt, rc = -EINVAL);
6971         }
6972
6973         if (lmd_flags & LMD_FLG_DEV_RDONLY) {
6974                 if (priv_dev_set_rdonly) {
6975                         priv_dev_set_rdonly(osd_sb(o)->s_bdev);
6976                         o->od_dt_dev.dd_rdonly = 1;
6977                         LCONSOLE_WARN("%s: set dev_rdonly on this device\n",
6978                                       name);
6979                 } else {
6980                         LCONSOLE_WARN("%s: not support dev_rdonly on this device",
6981                                       name);
6982
6983                         GOTO(out_mnt, rc = -EOPNOTSUPP);
6984                 }
6985         } else if (priv_dev_check_rdonly &&
6986                    priv_dev_check_rdonly(osd_sb(o)->s_bdev)) {
6987                 CERROR("%s: underlying device %s is marked as "
6988                        "read-only. Setup failed\n", name, dev);
6989
6990                 GOTO(out_mnt, rc = -EROFS);
6991         }
6992
6993         if (!LDISKFS_HAS_COMPAT_FEATURE(o->od_mnt->mnt_sb,
6994                                         LDISKFS_FEATURE_COMPAT_HAS_JOURNAL)) {
6995                 CERROR("%s: device %s is mounted w/o journal\n", name, dev);
6996                 GOTO(out_mnt, rc = -EINVAL);
6997         }
6998
6999 #ifdef LDISKFS_MOUNT_DIRDATA
7000         if (LDISKFS_HAS_INCOMPAT_FEATURE(o->od_mnt->mnt_sb,
7001                                          LDISKFS_FEATURE_INCOMPAT_DIRDATA))
7002                 LDISKFS_SB(osd_sb(o))->s_mount_opt |= LDISKFS_MOUNT_DIRDATA;
7003         else if (!o->od_is_ost)
7004                 CWARN("%s: device %s was upgraded from Lustre-1.x without "
7005                       "enabling the dirdata feature. If you do not want to "
7006                       "downgrade to Lustre-1.x again, you can enable it via "
7007                       "'tune2fs -O dirdata device'\n", name, dev);
7008 #endif
7009         inode = osd_sb(o)->s_root->d_inode;
7010         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
7011         rc = osd_ea_fid_set(info, inode, fid, LMAC_NOT_IN_OI, 0);
7012         if (rc != 0) {
7013                 CERROR("%s: failed to set lma on %s root inode\n", name, dev);
7014                 GOTO(out_mnt, rc);
7015         }
7016
7017         if (lmd_flags & LMD_FLG_NOSCRUB)
7018                 o->od_noscrub = 1;
7019
7020         GOTO(out, rc = 0);
7021
7022 out_mnt:
7023         mntput(o->od_mnt);
7024         o->od_mnt = NULL;
7025
7026 out:
7027         if (__page)
7028                 __free_page(__page);
7029
7030         return rc;
7031 }
7032
7033 static struct lu_device *osd_device_fini(const struct lu_env *env,
7034                                          struct lu_device *d)
7035 {
7036         struct osd_device *o = osd_dev(d);
7037         ENTRY;
7038
7039         osd_shutdown(env, o);
7040         osd_procfs_fini(o);
7041         osd_scrub_cleanup(env, o);
7042         osd_obj_map_fini(o);
7043         osd_umount(env, o);
7044
7045         RETURN(NULL);
7046 }
7047
7048 static int osd_device_init0(const struct lu_env *env,
7049                             struct osd_device *o,
7050                             struct lustre_cfg *cfg)
7051 {
7052         struct lu_device        *l = osd2lu_dev(o);
7053         struct osd_thread_info *info;
7054         int                     rc;
7055         int                     cplen = 0;
7056
7057         /* if the module was re-loaded, env can loose its keys */
7058         rc = lu_env_refill((struct lu_env *) env);
7059         if (rc)
7060                 GOTO(out, rc);
7061         info = osd_oti_get(env);
7062         LASSERT(info);
7063
7064         l->ld_ops = &osd_lu_ops;
7065         o->od_dt_dev.dd_ops = &osd_dt_ops;
7066
7067         spin_lock_init(&o->od_osfs_lock);
7068         mutex_init(&o->od_otable_mutex);
7069         INIT_LIST_HEAD(&o->od_orphan_list);
7070
7071         o->od_read_cache = 1;
7072         o->od_writethrough_cache = 1;
7073         o->od_readcache_max_filesize = OSD_MAX_CACHE_SIZE;
7074
7075         cplen = strlcpy(o->od_svname, lustre_cfg_string(cfg, 4),
7076                         sizeof(o->od_svname));
7077         if (cplen >= sizeof(o->od_svname)) {
7078                 rc = -E2BIG;
7079                 GOTO(out, rc);
7080         }
7081
7082         o->od_index = -1; /* -1 means index is invalid */
7083         rc = server_name2index(o->od_svname, &o->od_index, NULL);
7084         if (rc == LDD_F_SV_TYPE_OST)
7085                 o->od_is_ost = 1;
7086
7087         o->od_full_scrub_ratio = OFSR_DEFAULT;
7088         o->od_full_scrub_threshold_rate = FULL_SCRUB_THRESHOLD_RATE_DEFAULT;
7089         rc = osd_mount(env, o, cfg);
7090         if (rc != 0)
7091                 GOTO(out, rc);
7092
7093         rc = osd_obj_map_init(env, o);
7094         if (rc != 0)
7095                 GOTO(out_mnt, rc);
7096
7097         rc = lu_site_init(&o->od_site, l);
7098         if (rc != 0)
7099                 GOTO(out_compat, rc);
7100         o->od_site.ls_bottom_dev = l;
7101
7102         rc = lu_site_init_finish(&o->od_site);
7103         if (rc != 0)
7104                 GOTO(out_site, rc);
7105
7106         INIT_LIST_HEAD(&o->od_ios_list);
7107         /* setup scrub, including OI files initialization */
7108         rc = osd_scrub_setup(env, o);
7109         if (rc < 0)
7110                 GOTO(out_site, rc);
7111
7112         rc = osd_procfs_init(o, o->od_svname);
7113         if (rc != 0) {
7114                 CERROR("%s: can't initialize procfs: rc = %d\n",
7115                        o->od_svname, rc);
7116                 GOTO(out_scrub, rc);
7117         }
7118
7119         LASSERT(l->ld_site->ls_linkage.next != NULL);
7120         LASSERT(l->ld_site->ls_linkage.prev != NULL);
7121
7122         /* initialize quota slave instance */
7123         o->od_quota_slave = qsd_init(env, o->od_svname, &o->od_dt_dev,
7124                                      o->od_proc_entry);
7125         if (IS_ERR(o->od_quota_slave)) {
7126                 rc = PTR_ERR(o->od_quota_slave);
7127                 o->od_quota_slave = NULL;
7128                 GOTO(out_procfs, rc);
7129         }
7130
7131         RETURN(0);
7132
7133 out_procfs:
7134         osd_procfs_fini(o);
7135 out_scrub:
7136         osd_scrub_cleanup(env, o);
7137 out_site:
7138         lu_site_fini(&o->od_site);
7139 out_compat:
7140         osd_obj_map_fini(o);
7141 out_mnt:
7142         osd_umount(env, o);
7143 out:
7144         return rc;
7145 }
7146
7147 static struct lu_device *osd_device_alloc(const struct lu_env *env,
7148                                           struct lu_device_type *t,
7149                                           struct lustre_cfg *cfg)
7150 {
7151         struct osd_device *o;
7152         int                rc;
7153
7154         OBD_ALLOC_PTR(o);
7155         if (o == NULL)
7156                 return ERR_PTR(-ENOMEM);
7157
7158         rc = dt_device_init(&o->od_dt_dev, t);
7159         if (rc == 0) {
7160                 /* Because the ctx might be revived in dt_device_init,
7161                  * refill the env here */
7162                 lu_env_refill((struct lu_env *)env);
7163                 rc = osd_device_init0(env, o, cfg);
7164                 if (rc)
7165                         dt_device_fini(&o->od_dt_dev);
7166         }
7167
7168         if (unlikely(rc != 0))
7169                 OBD_FREE_PTR(o);
7170
7171         return rc == 0 ? osd2lu_dev(o) : ERR_PTR(rc);
7172 }
7173
7174 static struct lu_device *osd_device_free(const struct lu_env *env,
7175                                          struct lu_device *d)
7176 {
7177         struct osd_device *o = osd_dev(d);
7178         ENTRY;
7179
7180         /* XXX: make osd top device in order to release reference */
7181         d->ld_site->ls_top_dev = d;
7182         lu_site_purge(env, d->ld_site, -1);
7183         if (!cfs_hash_is_empty(d->ld_site->ls_obj_hash)) {
7184                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
7185                 lu_site_print(env, d->ld_site, &msgdata, lu_cdebug_printer);
7186         }
7187         lu_site_fini(&o->od_site);
7188         dt_device_fini(&o->od_dt_dev);
7189         OBD_FREE_PTR(o);
7190         RETURN(NULL);
7191 }
7192
7193 static int osd_process_config(const struct lu_env *env,
7194                               struct lu_device *d, struct lustre_cfg *cfg)
7195 {
7196         struct osd_device               *o = osd_dev(d);
7197         int                             rc;
7198         ENTRY;
7199
7200         switch (cfg->lcfg_command) {
7201         case LCFG_SETUP:
7202                 rc = osd_mount(env, o, cfg);
7203                 break;
7204         case LCFG_CLEANUP:
7205                 lu_dev_del_linkage(d->ld_site, d);
7206                 rc = osd_shutdown(env, o);
7207                 break;
7208         case LCFG_PARAM:
7209                 LASSERT(&o->od_dt_dev);
7210                 rc = class_process_proc_param(PARAM_OSD, lprocfs_osd_obd_vars,
7211                                               cfg, &o->od_dt_dev);
7212                 if (rc > 0 || rc == -ENOSYS)
7213                         rc = class_process_proc_param(PARAM_OST,
7214                                                       lprocfs_osd_obd_vars,
7215                                                       cfg, &o->od_dt_dev);
7216                 break;
7217         default:
7218                 rc = -ENOSYS;
7219         }
7220
7221         RETURN(rc);
7222 }
7223
7224 static int osd_recovery_complete(const struct lu_env *env,
7225                                  struct lu_device *d)
7226 {
7227         struct osd_device       *osd = osd_dev(d);
7228         int                      rc = 0;
7229         ENTRY;
7230
7231         if (osd->od_quota_slave == NULL)
7232                 RETURN(0);
7233
7234         /* start qsd instance on recovery completion, this notifies the quota
7235          * slave code that we are about to process new requests now */
7236         rc = qsd_start(env, osd->od_quota_slave);
7237         RETURN(rc);
7238 }
7239
7240 /*
7241  * we use exports to track all osd users
7242  */
7243 static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
7244                            struct obd_device *obd, struct obd_uuid *cluuid,
7245                            struct obd_connect_data *data, void *localdata)
7246 {
7247         struct osd_device    *osd = osd_dev(obd->obd_lu_dev);
7248         struct lustre_handle  conn;
7249         int                   rc;
7250         ENTRY;
7251
7252         CDEBUG(D_CONFIG, "connect #%d\n", osd->od_connects);
7253
7254         rc = class_connect(&conn, obd, cluuid);
7255         if (rc)
7256                 RETURN(rc);
7257
7258         *exp = class_conn2export(&conn);
7259
7260         spin_lock(&osd->od_osfs_lock);
7261         osd->od_connects++;
7262         spin_unlock(&osd->od_osfs_lock);
7263
7264         RETURN(0);
7265 }
7266
7267 /*
7268  * once last export (we don't count self-export) disappeared
7269  * osd can be released
7270  */
7271 static int osd_obd_disconnect(struct obd_export *exp)
7272 {
7273         struct obd_device *obd = exp->exp_obd;
7274         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
7275         int                rc, release = 0;
7276         ENTRY;
7277
7278         /* Only disconnect the underlying layers on the final disconnect. */
7279         spin_lock(&osd->od_osfs_lock);
7280         osd->od_connects--;
7281         if (osd->od_connects == 0)
7282                 release = 1;
7283         spin_unlock(&osd->od_osfs_lock);
7284
7285         rc = class_disconnect(exp); /* bz 9811 */
7286
7287         if (rc == 0 && release)
7288                 class_manual_cleanup(obd);
7289         RETURN(rc);
7290 }
7291
7292 static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
7293                        struct lu_device *dev)
7294 {
7295         struct osd_device       *osd    = osd_dev(dev);
7296         struct lr_server_data   *lsd    =
7297                         &osd->od_dt_dev.dd_lu_dev.ld_site->ls_tgt->lut_lsd;
7298         int                      result = 0;
7299         ENTRY;
7300
7301         if (osd->od_quota_slave != NULL) {
7302                 /* set up quota slave objects */
7303                 result = qsd_prepare(env, osd->od_quota_slave);
7304                 if (result != 0)
7305                         RETURN(result);
7306         }
7307
7308         if (lsd->lsd_feature_incompat & OBD_COMPAT_OST) {
7309 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 52, 0)
7310                 if (lsd->lsd_feature_rocompat & OBD_ROCOMPAT_IDX_IN_IDIF) {
7311                         osd->od_index_in_idif = 1;
7312                 } else {
7313                         osd->od_index_in_idif = 0;
7314                         result = osd_register_proc_index_in_idif(osd);
7315                         if (result != 0)
7316                                 RETURN(result);
7317                 }
7318 #else
7319                 osd->od_index_in_idif = 1;
7320 #endif
7321         }
7322
7323         result = osd_fid_init(env, osd);
7324
7325         RETURN(result);
7326 }
7327
7328 static int osd_fid_alloc(const struct lu_env *env, struct obd_export *exp,
7329                          struct lu_fid *fid, struct md_op_data *op_data)
7330 {
7331         struct osd_device *osd = osd_dev(exp->exp_obd->obd_lu_dev);
7332
7333         return seq_client_alloc_fid(env, osd->od_cl_seq, fid);
7334 }
7335
7336 static const struct lu_object_operations osd_lu_obj_ops = {
7337         .loo_object_init      = osd_object_init,
7338         .loo_object_delete    = osd_object_delete,
7339         .loo_object_release   = osd_object_release,
7340         .loo_object_free      = osd_object_free,
7341         .loo_object_print     = osd_object_print,
7342         .loo_object_invariant = osd_object_invariant
7343 };
7344
7345 const struct lu_device_operations osd_lu_ops = {
7346         .ldo_object_alloc      = osd_object_alloc,
7347         .ldo_process_config    = osd_process_config,
7348         .ldo_recovery_complete = osd_recovery_complete,
7349         .ldo_prepare           = osd_prepare,
7350 };
7351
7352 static const struct lu_device_type_operations osd_device_type_ops = {
7353         .ldto_init = osd_type_init,
7354         .ldto_fini = osd_type_fini,
7355
7356         .ldto_start = osd_type_start,
7357         .ldto_stop  = osd_type_stop,
7358
7359         .ldto_device_alloc = osd_device_alloc,
7360         .ldto_device_free  = osd_device_free,
7361
7362         .ldto_device_init    = osd_device_init,
7363         .ldto_device_fini    = osd_device_fini
7364 };
7365
7366 static struct lu_device_type osd_device_type = {
7367         .ldt_tags     = LU_DEVICE_DT,
7368         .ldt_name     = LUSTRE_OSD_LDISKFS_NAME,
7369         .ldt_ops      = &osd_device_type_ops,
7370         .ldt_ctx_tags = LCT_LOCAL,
7371 };
7372
7373 static int osd_health_check(const struct lu_env *env, struct obd_device *obd)
7374 {
7375         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
7376         struct super_block *sb = osd_sb(osd);
7377
7378         return (osd->od_mnt == NULL || sb->s_flags & MS_RDONLY);
7379 }
7380
7381 /*
7382  * lprocfs legacy support.
7383  */
7384 static struct obd_ops osd_obd_device_ops = {
7385         .o_owner = THIS_MODULE,
7386         .o_connect      = osd_obd_connect,
7387         .o_disconnect   = osd_obd_disconnect,
7388         .o_fid_alloc    = osd_fid_alloc,
7389         .o_health_check = osd_health_check,
7390 };
7391
7392 static int __init osd_init(void)
7393 {
7394         int rc;
7395
7396         LASSERT(BH_DXLock < sizeof(((struct buffer_head *)0)->b_state) * 8);
7397 #if !defined(CONFIG_DEBUG_MUTEXES) && !defined(CONFIG_DEBUG_SPINLOCK)
7398         /* please, try to keep osd_thread_info smaller than a page */
7399         CLASSERT(sizeof(struct osd_thread_info) <= PAGE_SIZE);
7400 #endif
7401
7402         osd_oi_mod_init();
7403
7404         rc = lu_kmem_init(ldiskfs_caches);
7405         if (rc)
7406                 return rc;
7407
7408 #ifdef CONFIG_KALLSYMS
7409         priv_dev_set_rdonly = (void *)kallsyms_lookup_name("dev_set_rdonly");
7410         priv_dev_check_rdonly = (void *)kallsyms_lookup_name("dev_check_rdonly");
7411         /* Clear readonly is unused at this time */
7412         /*priv_dev_clear_rdonly = (void *)kallsyms_lookup_name("dev_clear_rdonly");*/
7413 #endif
7414
7415         rc = class_register_type(&osd_obd_device_ops, NULL, true,
7416                                  lprocfs_osd_module_vars,
7417                                  LUSTRE_OSD_LDISKFS_NAME, &osd_device_type);
7418         if (rc)
7419                 lu_kmem_fini(ldiskfs_caches);
7420         return rc;
7421 }
7422
7423 static void __exit osd_exit(void)
7424 {
7425         class_unregister_type(LUSTRE_OSD_LDISKFS_NAME);
7426         lu_kmem_fini(ldiskfs_caches);
7427 }
7428
7429 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
7430 MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_LDISKFS_NAME")");
7431 MODULE_VERSION(LUSTRE_VERSION_STRING);
7432 MODULE_LICENSE("GPL");
7433
7434 module_init(osd_init);
7435 module_exit(osd_exit);