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         int                      oclb_items;
 805         bool                     oclb_found;
 806 };
 807
 808 /**
 809  * It is called internally by ->readdir() to filter out the
 810  * local slave object's FID of the striped directory.
 811  *
 812  * \retval      1 found the local slave's FID
 813  * \retval      0 continue to check next item
 814  * \retval      -ve for failure
 815  */
 816 #ifdef HAVE_FILLDIR_USE_CTX
 817 static int osd_stripe_dir_filldir(struct dir_context *buf,
 818 #else
 819 static int osd_stripe_dir_filldir(void *buf,
 820 #endif
 821                                   const char *name, int namelen,
 822                                   loff_t offset, __u64 ino, unsigned d_type)
 823 {
 824         struct osd_check_lmv_buf *oclb = (struct osd_check_lmv_buf *)buf;
 825         struct osd_thread_info *oti = oclb->oclb_info;
 826         struct lu_fid *fid = &oti->oti_fid3;
 827         struct osd_inode_id *id = &oti->oti_id3;
 828         struct osd_device *dev = oclb->oclb_dev;
 829         struct osd_idmap_cache *oic = oclb->oclb_oic;
 830         struct inode *inode;
 831
 832         oclb->oclb_items++;
 833
 834         if (name[0] == '.')
 835                 return 0;
 836
 837         fid_zero(fid);
 838         sscanf(name + 1, SFID, RFID(fid));
 839         if (!fid_is_sane(fid))
 840                 return 0;
 841
 842         if (osd_remote_fid(oti->oti_env, dev, fid))
 843                 return 0;
 844
 845         osd_id_gen(id, ino, OSD_OII_NOGEN);
 846         inode = osd_iget(oti, dev, id);
 847         if (IS_ERR(inode))
 848                 return PTR_ERR(inode);
 849
 850         iput(inode);
 851         osd_add_oi_cache(oti, dev, id, fid);
 852         oic->oic_fid = *fid;
 853         oic->oic_lid = *id;
 854         oic->oic_dev = dev;
 855         osd_oii_insert(dev, oic, true);
 856         oclb->oclb_found = true;
 857
 858         return 1;
 859 }
 860
 861 /* When lookup item under striped directory, we need to locate the master
 862  * MDT-object of the striped directory firstly, then the client will send
 863  * lookup (getattr_by_name) RPC to the MDT with some slave MDT-object's FID
 864  * and the item's name. If the system is restored from MDT file level backup,
 865  * then before the OI scrub completely built the OI files, the OI mappings of
 866  * the master MDT-object and slave MDT-object may be invalid. Usually, it is
 867  * not a problem for the master MDT-object. Because when locate the master
 868  * MDT-object, we will do name based lookup (for the striped directory itself)
 869  * firstly, during such process we can setup the correct OI mapping for the
 870  * master MDT-object. But it will be trouble for the slave MDT-object. Because
 871  * the client will not trigger name based lookup on the MDT to locate the slave
 872  * MDT-object before locating item under the striped directory, then when
 873  * osd_fid_lookup(), it will find that the OI mapping for the slave MDT-object
 874  * is invalid and does not know what the right OI mapping is, then the MDT has
 875  * to return -EINPROGRESS to the client to notify that the OI scrub is rebuiding
 876  * the OI file, related OI mapping is unknown yet, please try again later. And
 877  * then client will re-try the RPC again and again until related OI mapping has
 878  * been updated. That is quite inefficient.
 879  *
 880  * To resolve above trouble, we will handle it as the following two cases:
 881  *
 882  * 1) The slave MDT-object and the master MDT-object are on different MDTs.
 883  *    It is relative easy. Be as one of remote MDT-objects, the slave MDT-object
 884  *    is linked under /REMOTE_PARENT_DIR with the name of its FID string.
 885  *    We can locate the slave MDT-object via lookup the /REMOTE_PARENT_DIR
 886  *    directly. Please check osd_fid_lookup().
 887  *
 888  * 2) The slave MDT-object and the master MDT-object reside on the same MDT.
 889  *    Under such case, during lookup the master MDT-object, we will lookup the
 890  *    slave MDT-object via readdir against the master MDT-object, because the
 891  *    slave MDT-objects information are stored as sub-directories with the name
 892  *    "${FID}:${index}". Then when find the local slave MDT-object, its OI
 893  *    mapping will be recorded. Then subsequent osd_fid_lookup() will know
 894  *    the correct OI mapping for the slave MDT-object. */
 895 static int osd_check_lmv(struct osd_thread_info *oti, struct osd_device *dev,
 896                          struct inode *inode, struct osd_idmap_cache *oic)
 897 {
 898         struct lu_buf *buf = &oti->oti_big_buf;
 899         struct dentry *dentry = &oti->oti_obj_dentry;
 900         struct file *filp = &oti->oti_file;
 901         const struct file_operations *fops;
 902         struct lmv_mds_md_v1 *lmv1;
 903         struct osd_check_lmv_buf oclb = {
 904 #ifdef HAVE_DIR_CONTEXT
 905                 .ctx.actor = osd_stripe_dir_filldir,
 906 #endif
 907                 .oclb_info = oti,
 908                 .oclb_dev = dev,
 909                 .oclb_oic = oic,
 910                 .oclb_found = false,
 911         };
 912         int rc = 0;
 913         ENTRY;
 914
 915 again:
 916         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMV, buf->lb_buf,
 917                              buf->lb_len);
 918         if (rc == -ERANGE) {
 919                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMV, NULL, 0);
 920                 if (rc > 0) {
 921                         lu_buf_realloc(buf, rc);
 922                         if (buf->lb_buf == NULL)
 923                                 GOTO(out, rc = -ENOMEM);
 924
 925                         goto again;
 926                 }
 927         }
 928
 929         if (unlikely(rc == 0 || rc == -ENODATA))
 930                 GOTO(out, rc = 0);
 931
 932         if (rc < 0)
 933                 GOTO(out, rc);
 934
 935         if (unlikely(buf->lb_buf == NULL)) {
 936                 lu_buf_realloc(buf, rc);
 937                 if (buf->lb_buf == NULL)
 938                         GOTO(out, rc = -ENOMEM);
 939
 940                 goto again;
 941         }
 942
 943         lmv1 = buf->lb_buf;
 944         if (le32_to_cpu(lmv1->lmv_magic) != LMV_MAGIC_V1)
 945                 GOTO(out, rc = 0);
 946
 947         fops = inode->i_fop;
 948         dentry->d_inode = inode;
 949         dentry->d_sb = inode->i_sb;
 950         filp->f_pos = 0;
 951         filp->f_path.dentry = dentry;
 952         filp->f_mode = FMODE_64BITHASH;
 953         filp->f_mapping = inode->i_mapping;
 954         filp->f_op = fops;
 955         filp->private_data = NULL;
 956         set_file_inode(filp, inode);
 957
 958         do {
 959                 oclb.oclb_items = 0;
 960 #ifdef HAVE_DIR_CONTEXT
 961                 oclb.ctx.pos = filp->f_pos;
 962                 rc = fops->iterate(filp, &oclb.ctx);
 963                 filp->f_pos = oclb.ctx.pos;
 964 #else
 965                 rc = fops->readdir(filp, &oclb, osd_stripe_dir_filldir);
 966 #endif
 967         } while (rc >= 0 && oclb.oclb_items > 0 && !oclb.oclb_found &&
 968                  filp->f_pos != LDISKFS_HTREE_EOF_64BIT);
 969         fops->release(inode, filp);
 970
 971 out:
 972         if (rc < 0)
 973                 CDEBUG(D_LFSCK, "%s: fail to check LMV EA, inode = %lu/%u,"
 974                        DFID": rc = %d\n", osd_ino2name(inode),
 975                        inode->i_ino, inode->i_generation,
 976                        PFID(&oic->oic_fid), rc);
 977         else
 978                 rc = 0;
 979
 980         RETURN(rc);
 981 }
 982
 983 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
 984                           const struct lu_fid *fid,
 985                           const struct lu_object_conf *conf)
 986 {
 987         struct osd_thread_info *info;
 988         struct lu_device *ldev = obj->oo_dt.do_lu.lo_dev;
 989         struct osd_device *dev;
 990         struct osd_idmap_cache *oic;
 991         struct osd_inode_id *id;
 992         struct inode *inode = NULL;
 993         struct osd_scrub *scrub;
 994         struct scrub_file *sf;
 995         __u32 flags = SS_CLEAR_DRYRUN | SS_CLEAR_FAILOUT | SS_AUTO_FULL;
 996         __u32 saved_ino;
 997         __u32 saved_gen;
 998         int result = 0;
 999         int rc1 = 0;
1000         bool remote = false;
1001         bool trusted = true;
1002         bool updated = false;
1003         ENTRY;
1004
1005         LINVRNT(osd_invariant(obj));
1006         LASSERT(obj->oo_inode == NULL);
1007         LASSERTF(fid_is_sane(fid) || fid_is_idif(fid), DFID"\n", PFID(fid));
1008
1009         dev = osd_dev(ldev);
1010         scrub = &dev->od_scrub;
1011         sf = &scrub->os_file;
1012         info = osd_oti_get(env);
1013         LASSERT(info);
1014         oic = &info->oti_cache;
1015
1016         if (OBD_FAIL_CHECK(OBD_FAIL_SRV_ENOENT))
1017                 RETURN(-ENOENT);
1018
1019         /* For the object is created as locking anchor, or for the object to
1020          * be created on disk. No need to osd_oi_lookup() at here because FID
1021          * shouldn't never be re-used, if it's really a duplicate FID from
1022          * unexpected reason, we should be able to detect it later by calling
1023          * do_create->osd_oi_insert(). */
1024         if (conf && conf->loc_flags & LOC_F_NEW)
1025                 GOTO(out, result = 0);
1026
1027         /* Search order: 1. per-thread cache. */
1028         if (lu_fid_eq(fid, &oic->oic_fid) && likely(oic->oic_dev == dev)) {
1029                 id = &oic->oic_lid;
1030                 goto iget;
1031         }
1032
1033         id = &info->oti_id;
1034         if (!list_empty(&scrub->os_inconsistent_items)) {
1035                 /* Search order: 2. OI scrub pending list. */
1036                 result = osd_oii_lookup(dev, fid, id);
1037                 if (!result)
1038                         goto iget;
1039         }
1040
1041         /* The OI mapping in the OI file can be updated by the OI scrub
1042          * when we locate the inode via FID. So it may be not trustable. */
1043         trusted = false;
1044
1045         /* Search order: 3. OI files. */
1046         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1047         if (result == -ENOENT) {
1048                 if (!(fid_is_norm(fid) || fid_is_igif(fid)) ||
1049                     fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
1050                     !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
1051                                       sf->sf_oi_bitmap))
1052                         GOTO(out, result = 0);
1053
1054                 goto trigger;
1055         }
1056
1057         if (result)
1058                 GOTO(out, result);
1059
1060 iget:
1061         obj->oo_inode = NULL;
1062         /* for later passes through checks, not true on first pass */
1063         if (!IS_ERR_OR_NULL(inode))
1064                 iput(inode);
1065
1066         inode = osd_iget_check(info, dev, fid, id, trusted);
1067         if (!IS_ERR(inode)) {
1068                 obj->oo_inode = inode;
1069                 result = 0;
1070                 if (remote)
1071                         goto trigger;
1072
1073                 goto check_lma;
1074         }
1075
1076         result = PTR_ERR(inode);
1077         if (result == -ENOENT || result == -ESTALE)
1078                 GOTO(out, result = 0);
1079
1080         if (result != -EREMCHG)
1081                 GOTO(out, result);
1082
1083 trigger:
1084         /* We still have chance to get the valid inode: for the
1085          * object which is referenced by remote name entry, the
1086          * object on the local MDT will be linked under the dir
1087          * of "/REMOTE_PARENT_DIR" with its FID string as name.
1088          *
1089          * We do not know whether the object for the given FID
1090          * is referenced by some remote name entry or not, and
1091          * especially for DNE II, a multiple-linked object may
1092          * have many name entries reside on many MDTs.
1093          *
1094          * To simplify the operation, OSD will not distinguish
1095          * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
1096          * only happened for the RPC from other MDT during the
1097          * OI scrub, or for the client side RPC with FID only,
1098          * such as FID to path, or from old connected client. */
1099         if (!remote && !fid_is_on_ost(info, dev, fid, OI_CHECK_FLD)) {
1100                 rc1 = osd_lookup_in_remote_parent(info, dev, fid, id);
1101                 if (!rc1) {
1102                         remote = true;
1103                         trusted = true;
1104                         flags |= SS_AUTO_PARTIAL;
1105                         flags &= ~SS_AUTO_FULL;
1106                         goto iget;
1107                 }
1108         }
1109
1110         if (thread_is_running(&scrub->os_thread)) {
1111                 if (scrub->os_partial_scan && !scrub->os_in_join)
1112                         goto join;
1113
1114                 if (IS_ERR_OR_NULL(inode) || result)
1115                         GOTO(out, result = -EINPROGRESS);
1116
1117                 LASSERT(remote);
1118                 LASSERT(obj->oo_inode == inode);
1119
1120                 osd_add_oi_cache(info, dev, id, fid);
1121                 osd_oii_insert(dev, oic, true);
1122                 goto found;
1123         }
1124
1125         if (dev->od_noscrub) {
1126                 if (!remote)
1127                         GOTO(out, result = -EREMCHG);
1128
1129                 LASSERT(!result);
1130                 LASSERT(obj->oo_inode == inode);
1131
1132                 osd_add_oi_cache(info, dev, id, fid);
1133                 goto found;
1134         }
1135
1136 join:
1137         rc1 = osd_scrub_start(dev, flags);
1138         LCONSOLE_WARN("%s: trigger OI scrub by RPC for the " DFID" with flags "
1139                       "0x%x, rc = %d\n", osd_name(dev), PFID(fid), flags, rc1);
1140         if (rc1 && rc1 != -EALREADY)
1141                 GOTO(out, result = -EREMCHG);
1142
1143         if (IS_ERR_OR_NULL(inode) || result)
1144                 GOTO(out, result = -EINPROGRESS);
1145
1146         LASSERT(remote);
1147         LASSERT(obj->oo_inode == inode);
1148
1149         osd_add_oi_cache(info, dev, id, fid);
1150         osd_oii_insert(dev, oic, true);
1151         goto found;
1152
1153 check_lma:
1154         result = osd_check_lma(env, obj);
1155         if (!result)
1156                 goto found;
1157
1158         LASSERTF(id->oii_ino == inode->i_ino &&
1159                  id->oii_gen == inode->i_generation,
1160                  "locate wrong inode for FID: "DFID", %u/%u => %ld/%u\n",
1161                  PFID(fid), id->oii_ino, id->oii_gen,
1162                  inode->i_ino, inode->i_generation);
1163
1164         saved_ino = inode->i_ino;
1165         saved_gen = inode->i_generation;
1166
1167         if (unlikely(result == -ENODATA)) {
1168                 /* If the OI scrub updated the OI mapping by race, it
1169                  * must be valid. Trust the inode that has no LMA EA. */
1170                 if (updated)
1171                         goto found;
1172
1173                 result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1174                 if (!result) {
1175                         /* The OI mapping is still there, the inode is still
1176                          * valid. It is just becaues the inode has no LMA EA. */
1177                         if (saved_ino == id->oii_ino &&
1178                             saved_gen == id->oii_gen)
1179                                 goto found;
1180
1181                         /* It is the OI scrub updated the OI mapping by race.
1182                          * The new OI mapping must be valid. */
1183                         trusted = true;
1184                         updated = true;
1185                         goto iget;
1186                 }
1187
1188                 /* "result == -ENOENT" means that the OI mappinghas been
1189                  * removed by race, so the inode belongs to other object.
1190                  *
1191                  * Others error can be returned  directly. */
1192                 if (result == -ENOENT) {
1193                         LASSERT(trusted);
1194
1195                         obj->oo_inode = NULL;
1196                         result = 0;
1197                 }
1198         }
1199
1200         if (result != -EREMCHG)
1201                 GOTO(out, result);
1202
1203         LASSERT(!updated);
1204
1205         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1206         /* "result == -ENOENT" means the cached OI mapping has been removed
1207          * from the OI file by race, above inode belongs to other object. */
1208         if (result == -ENOENT) {
1209                 LASSERT(trusted);
1210
1211                 obj->oo_inode = NULL;
1212                 GOTO(out, result = 0);
1213         }
1214
1215         if (result)
1216                 GOTO(out, result);
1217
1218         if (saved_ino == id->oii_ino && saved_gen == id->oii_gen) {
1219                 result = -EREMCHG;
1220                 goto trigger;
1221         }
1222
1223         /* It is the OI scrub updated the OI mapping by race.
1224          * The new OI mapping must be valid. */
1225         trusted = true;
1226         updated = true;
1227         goto iget;
1228
1229 found:
1230         obj->oo_compat_dot_created = 1;
1231         obj->oo_compat_dotdot_created = 1;
1232
1233         if (S_ISDIR(inode->i_mode) &&
1234             (flags & SS_AUTO_PARTIAL || sf->sf_status == SS_SCANNING))
1235                 osd_check_lmv(info, dev, inode, oic);
1236
1237         result = osd_attach_jinode(inode);
1238         if (result)
1239                 GOTO(out, result);
1240
1241         if (!ldiskfs_pdo)
1242                 GOTO(out, result = 0);
1243
1244         LASSERT(!obj->oo_hl_head);
1245         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
1246
1247         GOTO(out, result = (!obj->oo_hl_head ? -ENOMEM : 0));
1248
1249 out:
1250         if (result || !obj->oo_inode) {
1251                 if (!IS_ERR_OR_NULL(inode))
1252                         iput(inode);
1253
1254                 obj->oo_inode = NULL;
1255                 if (trusted)
1256                         fid_zero(&oic->oic_fid);
1257         }
1258
1259         LINVRNT(osd_invariant(obj));
1260         return result;
1261 }
1262
1263 /*
1264  * Concurrency: shouldn't matter.
1265  */
1266 static void osd_object_init0(struct osd_object *obj)
1267 {
1268         LASSERT(obj->oo_inode != NULL);
1269         obj->oo_dt.do_body_ops = &osd_body_ops;
1270         obj->oo_dt.do_lu.lo_header->loh_attr |=
1271                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
1272 }
1273
1274 /*
1275  * Concurrency: no concurrent access is possible that early in object
1276  * life-cycle.
1277  */
1278 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
1279                            const struct lu_object_conf *conf)
1280 {
1281         struct osd_object *obj = osd_obj(l);
1282         int result;
1283
1284         LINVRNT(osd_invariant(obj));
1285
1286         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
1287                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
1288                 l->lo_header->loh_attr |= LOHA_EXISTS;
1289                 return 0;
1290         }
1291
1292         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
1293         obj->oo_dt.do_body_ops = &osd_body_ops_new;
1294         if (result == 0 && obj->oo_inode != NULL) {
1295                 struct osd_thread_info *oti = osd_oti_get(env);
1296                 struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
1297
1298                 osd_object_init0(obj);
1299                 result = osd_get_lma(oti, obj->oo_inode,
1300                                      &oti->oti_obj_dentry, loa);
1301                 if (!result) {
1302                         /* Convert LMAI flags to lustre LMA flags
1303                          * and cache it to oo_lma_flags */
1304                         obj->oo_lma_flags =
1305                                 lma_to_lustre_flags(loa->loa_lma.lma_incompat);
1306                 } else if (result == -ENODATA) {
1307                         result = 0;
1308                 }
1309         }
1310
1311         LINVRNT(osd_invariant(obj));
1312         return result;
1313 }
1314
1315 /* The first part of oxe_buf is xattr name, and is '\0' terminated.
1316  * The left part is for value, binary mode. */
1317 struct osd_xattr_entry {
1318         struct list_head        oxe_list;
1319         size_t                  oxe_len;
1320         size_t                  oxe_namelen;
1321         bool                    oxe_exist;
1322         struct rcu_head         oxe_rcu;
1323         char                    oxe_buf[0];
1324 };
1325
1326 static int osd_oxc_get(struct osd_object *obj, const char *name,
1327                        struct lu_buf *buf)
1328 {
1329         struct osd_xattr_entry *tmp;
1330         struct osd_xattr_entry *oxe = NULL;
1331         size_t namelen = strlen(name);
1332         int rc;
1333         ENTRY;
1334
1335         rcu_read_lock();
1336         list_for_each_entry_rcu(tmp, &obj->oo_xattr_list, oxe_list) {
1337                 if (namelen == tmp->oxe_namelen &&
1338                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1339                         oxe = tmp;
1340                         break;
1341                 }
1342         }
1343
1344         if (oxe == NULL)
1345                 GOTO(out, rc = -ENOENT);
1346
1347         if (!oxe->oxe_exist)
1348                 GOTO(out, rc = -ENODATA);
1349
1350         /* vallen */
1351         rc = oxe->oxe_len - sizeof(*oxe) - oxe->oxe_namelen - 1;
1352         LASSERT(rc > 0);
1353
1354         if (buf->lb_buf == NULL)
1355                 GOTO(out, rc);
1356
1357         if (buf->lb_len < rc)
1358                 GOTO(out, rc = -ERANGE);
1359
1360         memcpy(buf->lb_buf, &oxe->oxe_buf[namelen + 1], rc);
1361         EXIT;
1362 out:
1363         rcu_read_unlock();
1364
1365         return rc;
1366 }
1367
1368 static void osd_oxc_free(struct rcu_head *head)
1369 {
1370         struct osd_xattr_entry *oxe;
1371
1372         oxe = container_of(head, struct osd_xattr_entry, oxe_rcu);
1373         OBD_FREE(oxe, oxe->oxe_len);
1374 }
1375
1376 static void osd_oxc_add(struct osd_object *obj, const char *name,
1377                         const char *buf, int buflen)
1378 {
1379         struct osd_xattr_entry *oxe;
1380         struct osd_xattr_entry *old = NULL;
1381         struct osd_xattr_entry *tmp;
1382         size_t namelen = strlen(name);
1383         size_t len = sizeof(*oxe) + namelen + 1 + buflen;
1384
1385         OBD_ALLOC(oxe, len);
1386         if (oxe == NULL)
1387                 return;
1388
1389         INIT_LIST_HEAD(&oxe->oxe_list);
1390         oxe->oxe_len = len;
1391         oxe->oxe_namelen = namelen;
1392         memcpy(oxe->oxe_buf, name, namelen);
1393         if (buflen > 0) {
1394                 LASSERT(buf != NULL);
1395                 memcpy(oxe->oxe_buf + namelen + 1, buf, buflen);
1396                 oxe->oxe_exist = true;
1397         } else {
1398                 oxe->oxe_exist = false;
1399         }
1400
1401         /* this should be rarely called, just remove old and add new */
1402         spin_lock(&obj->oo_guard);
1403         list_for_each_entry(tmp, &obj->oo_xattr_list, oxe_list) {
1404                 if (namelen == tmp->oxe_namelen &&
1405                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1406                         old = tmp;
1407                         break;
1408                 }
1409         }
1410         if (old != NULL) {
1411                 list_replace_rcu(&old->oxe_list, &oxe->oxe_list);
1412                 call_rcu(&old->oxe_rcu, osd_oxc_free);
1413         } else {
1414                 list_add_tail_rcu(&oxe->oxe_list, &obj->oo_xattr_list);
1415         }
1416         spin_unlock(&obj->oo_guard);
1417 }
1418
1419 static void osd_oxc_del(struct osd_object *obj, const char *name)
1420 {
1421         struct osd_xattr_entry *oxe;
1422         size_t namelen = strlen(name);
1423
1424         spin_lock(&obj->oo_guard);
1425         list_for_each_entry(oxe, &obj->oo_xattr_list, oxe_list) {
1426                 if (namelen == oxe->oxe_namelen &&
1427                     strncmp(name, oxe->oxe_buf, namelen) == 0) {
1428                         list_del_rcu(&oxe->oxe_list);
1429                         call_rcu(&oxe->oxe_rcu, osd_oxc_free);
1430                         break;
1431                 }
1432         }
1433         spin_unlock(&obj->oo_guard);
1434 }
1435
1436 static void osd_oxc_fini(struct osd_object *obj)
1437 {
1438         struct osd_xattr_entry *oxe, *next;
1439
1440         list_for_each_entry_safe(oxe, next, &obj->oo_xattr_list, oxe_list) {
1441                 list_del(&oxe->oxe_list);
1442                 OBD_FREE(oxe, oxe->oxe_len);
1443         }
1444 }
1445
1446 /*
1447  * Concurrency: no concurrent access is possible that late in object
1448  * life-cycle.
1449  */
1450 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
1451 {
1452         struct osd_object *obj = osd_obj(l);
1453
1454         LINVRNT(osd_invariant(obj));
1455
1456         osd_oxc_fini(obj);
1457         dt_object_fini(&obj->oo_dt);
1458         if (obj->oo_hl_head != NULL)
1459                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
1460         OBD_FREE_PTR(obj);
1461 }
1462
1463 /*
1464  * Concurrency: no concurrent access is possible that late in object
1465  * life-cycle.
1466  */
1467 static void osd_index_fini(struct osd_object *o)
1468 {
1469         struct iam_container *bag;
1470
1471         if (o->oo_dir != NULL) {
1472                 bag = &o->oo_dir->od_container;
1473                 if (o->oo_inode != NULL) {
1474                         if (bag->ic_object == o->oo_inode)
1475                                 iam_container_fini(bag);
1476                 }
1477                 OBD_FREE_PTR(o->oo_dir);
1478                 o->oo_dir = NULL;
1479         }
1480 }
1481
1482 /*
1483  * Concurrency: no concurrent access is possible that late in object
1484  * life-cycle (for all existing callers, that is. New callers have to provide
1485  * their own locking.)
1486  */
1487 static int osd_inode_unlinked(const struct inode *inode)
1488 {
1489         return inode->i_nlink == 0;
1490 }
1491
1492 enum {
1493         OSD_TXN_OI_DELETE_CREDITS    = 20,
1494         OSD_TXN_INODE_DELETE_CREDITS = 20
1495 };
1496
1497 /*
1498  * Journal
1499  */
1500
1501 #if OSD_THANDLE_STATS
1502 /**
1503  * Set time when the handle is allocated
1504  */
1505 static void osd_th_alloced(struct osd_thandle *oth)
1506 {
1507         oth->oth_alloced = ktime_get();
1508 }
1509
1510 /**
1511  * Set time when the handle started
1512  */
1513 static void osd_th_started(struct osd_thandle *oth)
1514 {
1515         oth->oth_started = ktime_get();
1516 }
1517
1518 /**
1519  * Check whether the we deal with this handle for too long.
1520  */
1521 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
1522                                 ktime_t alloced, ktime_t started,
1523                                 ktime_t closed)
1524 {
1525         ktime_t now = ktime_get();
1526
1527         LASSERT(dev != NULL);
1528
1529         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
1530                             ktime_us_delta(started, alloced));
1531         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
1532                             ktime_us_delta(closed, started));
1533         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
1534                             ktime_us_delta(now, closed));
1535
1536         if (ktime_before(ktime_add_ns(alloced, 30 * NSEC_PER_SEC), now)) {
1537                 CWARN("transaction handle %p was open for too long: now %lld, alloced %lld, started %lld, closed %lld\n",
1538                       oth, now, alloced, started, closed);
1539                 libcfs_debug_dumpstack(NULL);
1540         }
1541 }
1542
1543 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
1544 {                                                                       \
1545         ktime_t __closed = ktime_get();                                 \
1546         ktime_t __alloced = oth->oth_alloced;                           \
1547         ktime_t __started = oth->oth_started;                           \
1548                                                                         \
1549         expr;                                                           \
1550         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
1551 }
1552
1553 #else /* OSD_THANDLE_STATS */
1554
1555 #define osd_th_alloced(h)                  do {} while(0)
1556 #define osd_th_started(h)                  do {} while(0)
1557 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
1558
1559 #endif /* OSD_THANDLE_STATS */
1560
1561 /*
1562  * Concurrency: doesn't access mutable data.
1563  */
1564 static int osd_param_is_not_sane(const struct osd_device *dev,
1565                                  const struct thandle *th)
1566 {
1567         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
1568
1569         return oh->ot_credits > osd_transaction_size(dev);
1570 }
1571
1572 /*
1573  * Concurrency: shouldn't matter.
1574  */
1575 static void osd_trans_commit_cb(struct super_block *sb,
1576                                 struct ldiskfs_journal_cb_entry *jcb, int error)
1577 {
1578         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
1579         struct thandle     *th  = &oh->ot_super;
1580         struct lu_device   *lud = &th->th_dev->dd_lu_dev;
1581         struct dt_txn_commit_cb *dcb, *tmp;
1582
1583         LASSERT(oh->ot_handle == NULL);
1584
1585         if (error)
1586                 CERROR("transaction @0x%p commit error: %d\n", th, error);
1587
1588         dt_txn_hook_commit(th);
1589
1590         /* call per-transaction callbacks if any */
1591         list_for_each_entry_safe(dcb, tmp, &oh->ot_commit_dcb_list,
1592                                  dcb_linkage) {
1593                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
1594                          "commit callback entry: magic=%x name='%s'\n",
1595                          dcb->dcb_magic, dcb->dcb_name);
1596                 list_del_init(&dcb->dcb_linkage);
1597                 dcb->dcb_func(NULL, th, dcb, error);
1598         }
1599
1600         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
1601         lu_device_put(lud);
1602         th->th_dev = NULL;
1603
1604         lu_context_exit(&th->th_ctx);
1605         lu_context_fini(&th->th_ctx);
1606         OBD_FREE_PTR(oh);
1607 }
1608
1609 #ifndef HAVE_SB_START_WRITE
1610 # define sb_start_write(sb) do {} while (0)
1611 # define sb_end_write(sb) do {} while (0)
1612 #endif
1613
1614 static struct thandle *osd_trans_create(const struct lu_env *env,
1615                                         struct dt_device *d)
1616 {
1617         struct osd_thread_info  *oti = osd_oti_get(env);
1618         struct osd_iobuf        *iobuf = &oti->oti_iobuf;
1619         struct osd_thandle      *oh;
1620         struct thandle          *th;
1621         ENTRY;
1622
1623         if (d->dd_rdonly) {
1624                 CERROR("%s: someone try to start transaction under "
1625                        "readonly mode, should be disabled.\n",
1626                        osd_name(osd_dt_dev(d)));
1627                 dump_stack();
1628                 RETURN(ERR_PTR(-EROFS));
1629         }
1630
1631         /* on pending IO in this thread should left from prev. request */
1632         LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
1633
1634         sb_start_write(osd_sb(osd_dt_dev(d)));
1635
1636         OBD_ALLOC_GFP(oh, sizeof *oh, GFP_NOFS);
1637         if (oh != NULL) {
1638                 oh->ot_quota_trans = &oti->oti_quota_trans;
1639                 memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
1640                 th = &oh->ot_super;
1641                 th->th_dev = d;
1642                 th->th_result = 0;
1643                 th->th_tags = LCT_TX_HANDLE;
1644                 oh->ot_credits = 0;
1645                 INIT_LIST_HEAD(&oh->ot_commit_dcb_list);
1646                 INIT_LIST_HEAD(&oh->ot_stop_dcb_list);
1647                 osd_th_alloced(oh);
1648
1649                 memset(oti->oti_declare_ops, 0,
1650                        sizeof(oti->oti_declare_ops));
1651                 memset(oti->oti_declare_ops_cred, 0,
1652                        sizeof(oti->oti_declare_ops_cred));
1653                 memset(oti->oti_declare_ops_used, 0,
1654                        sizeof(oti->oti_declare_ops_used));
1655         } else {
1656                 sb_end_write(osd_sb(osd_dt_dev(d)));
1657                 th = ERR_PTR(-ENOMEM);
1658         }
1659         RETURN(th);
1660 }
1661
1662 void osd_trans_dump_creds(const struct lu_env *env, struct thandle *th)
1663 {
1664         struct osd_thread_info  *oti = osd_oti_get(env);
1665         struct osd_thandle      *oh;
1666
1667         oh = container_of0(th, struct osd_thandle, ot_super);
1668         LASSERT(oh != NULL);
1669
1670         CWARN("  create: %u/%u/%u, destroy: %u/%u/%u\n",
1671               oti->oti_declare_ops[OSD_OT_CREATE],
1672               oti->oti_declare_ops_cred[OSD_OT_CREATE],
1673               oti->oti_declare_ops_used[OSD_OT_CREATE],
1674               oti->oti_declare_ops[OSD_OT_DESTROY],
1675               oti->oti_declare_ops_cred[OSD_OT_DESTROY],
1676               oti->oti_declare_ops_used[OSD_OT_DESTROY]);
1677         CWARN("  attr_set: %u/%u/%u, xattr_set: %u/%u/%u\n",
1678               oti->oti_declare_ops[OSD_OT_ATTR_SET],
1679               oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
1680               oti->oti_declare_ops_used[OSD_OT_ATTR_SET],
1681               oti->oti_declare_ops[OSD_OT_XATTR_SET],
1682               oti->oti_declare_ops_cred[OSD_OT_XATTR_SET],
1683               oti->oti_declare_ops_used[OSD_OT_XATTR_SET]);
1684         CWARN("  write: %u/%u/%u, punch: %u/%u/%u, quota %u/%u/%u\n",
1685               oti->oti_declare_ops[OSD_OT_WRITE],
1686               oti->oti_declare_ops_cred[OSD_OT_WRITE],
1687               oti->oti_declare_ops_used[OSD_OT_WRITE],
1688               oti->oti_declare_ops[OSD_OT_PUNCH],
1689               oti->oti_declare_ops_cred[OSD_OT_PUNCH],
1690               oti->oti_declare_ops_used[OSD_OT_PUNCH],
1691               oti->oti_declare_ops[OSD_OT_QUOTA],
1692               oti->oti_declare_ops_cred[OSD_OT_QUOTA],
1693               oti->oti_declare_ops_used[OSD_OT_QUOTA]);
1694         CWARN("  insert: %u/%u/%u, delete: %u/%u/%u\n",
1695               oti->oti_declare_ops[OSD_OT_INSERT],
1696               oti->oti_declare_ops_cred[OSD_OT_INSERT],
1697               oti->oti_declare_ops_used[OSD_OT_INSERT],
1698               oti->oti_declare_ops[OSD_OT_DELETE],
1699               oti->oti_declare_ops_cred[OSD_OT_DELETE],
1700               oti->oti_declare_ops_used[OSD_OT_DELETE]);
1701         CWARN("  ref_add: %u/%u/%u, ref_del: %u/%u/%u\n",
1702               oti->oti_declare_ops[OSD_OT_REF_ADD],
1703               oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
1704               oti->oti_declare_ops_used[OSD_OT_REF_ADD],
1705               oti->oti_declare_ops[OSD_OT_REF_DEL],
1706               oti->oti_declare_ops_cred[OSD_OT_REF_DEL],
1707               oti->oti_declare_ops_used[OSD_OT_REF_DEL]);
1708 }
1709
1710 /*
1711  * Concurrency: shouldn't matter.
1712  */
1713 static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
1714                            struct thandle *th)
1715 {
1716         struct osd_thread_info *oti = osd_oti_get(env);
1717         struct osd_device  *dev = osd_dt_dev(d);
1718         handle_t           *jh;
1719         struct osd_thandle *oh;
1720         int rc;
1721
1722         ENTRY;
1723
1724         LASSERT(current->journal_info == NULL);
1725
1726         oh = container_of0(th, struct osd_thandle, ot_super);
1727         LASSERT(oh != NULL);
1728         LASSERT(oh->ot_handle == NULL);
1729
1730         rc = dt_txn_hook_start(env, d, th);
1731         if (rc != 0)
1732                 GOTO(out, rc);
1733
1734         if (unlikely(osd_param_is_not_sane(dev, th))) {
1735                 static unsigned long last_printed;
1736                 static int last_credits;
1737
1738                 /* don't make noise on a tiny testing systems
1739                  * actual credits misuse will be caught anyway */
1740                 if (last_credits != oh->ot_credits &&
1741                     time_after(jiffies, last_printed +
1742                                msecs_to_jiffies(60 * MSEC_PER_SEC)) &&
1743                     osd_transaction_size(dev) > 512) {
1744                         CWARN("%s: credits %u > trans_max %u\n", osd_name(dev),
1745                               oh->ot_credits, osd_transaction_size(dev));
1746                         osd_trans_dump_creds(env, th);
1747                         libcfs_debug_dumpstack(NULL);
1748                         last_credits = oh->ot_credits;
1749                         last_printed = jiffies;
1750                 }
1751                 /* XXX Limit the credits to 'max_transaction_buffers', and
1752                  *     let the underlying filesystem to catch the error if
1753                  *     we really need so many credits.
1754                  *
1755                  *     This should be removed when we can calculate the
1756                  *     credits precisely. */
1757                 oh->ot_credits = osd_transaction_size(dev);
1758         } else if (ldiskfs_track_declares_assert != 0) {
1759                 /* reserve few credits to prevent an assertion in JBD
1760                  * our debugging mechanism will be able to detected
1761                  * overuse. this can help to debug single-update
1762                  * transactions */
1763                 oh->ot_credits += 10;
1764                 if (unlikely(osd_param_is_not_sane(dev, th)))
1765                         oh->ot_credits = osd_transaction_size(dev);
1766         }
1767
1768         /*
1769          * XXX temporary stuff. Some abstraction layer should
1770          * be used.
1771          */
1772         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
1773         osd_th_started(oh);
1774         if (!IS_ERR(jh)) {
1775                 oh->ot_handle = jh;
1776                 LASSERT(oti->oti_txns == 0);
1777                 lu_context_init(&th->th_ctx, th->th_tags);
1778                 lu_context_enter(&th->th_ctx);
1779
1780                 lu_device_get(&d->dd_lu_dev);
1781                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
1782                               "osd-tx", th);
1783                 oti->oti_txns++;
1784                 rc = 0;
1785         } else {
1786                 rc = PTR_ERR(jh);
1787         }
1788 out:
1789         RETURN(rc);
1790 }
1791
1792 static int osd_seq_exists(const struct lu_env *env,
1793                           struct osd_device *osd, u64 seq)
1794 {
1795         struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
1796         struct seq_server_site  *ss = osd_seq_site(osd);
1797         int                     rc;
1798         ENTRY;
1799
1800         LASSERT(ss != NULL);
1801         LASSERT(ss->ss_server_fld != NULL);
1802
1803         rc = osd_fld_lookup(env, osd, seq, range);
1804         if (rc != 0) {
1805                 if (rc != -ENOENT)
1806                         CERROR("%s: can't lookup FLD sequence %#llx: rc = %d\n",
1807                                osd_name(osd), seq, rc);
1808                 RETURN(0);
1809         }
1810
1811         RETURN(ss->ss_node_id == range->lsr_index);
1812 }
1813
1814 static void osd_trans_stop_cb(struct osd_thandle *oth, int result)
1815 {
1816         struct dt_txn_commit_cb *dcb;
1817         struct dt_txn_commit_cb *tmp;
1818
1819         /* call per-transaction stop callbacks if any */
1820         list_for_each_entry_safe(dcb, tmp, &oth->ot_stop_dcb_list,
1821                                  dcb_linkage) {
1822                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
1823                          "commit callback entry: magic=%x name='%s'\n",
1824                          dcb->dcb_magic, dcb->dcb_name);
1825                 list_del_init(&dcb->dcb_linkage);
1826                 dcb->dcb_func(NULL, &oth->ot_super, dcb, result);
1827         }
1828 }
1829
1830 /*
1831  * Concurrency: shouldn't matter.
1832  */
1833 static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
1834                           struct thandle *th)
1835 {
1836         int                     rc = 0, remove_agents = 0;
1837         struct osd_thandle     *oh;
1838         struct osd_thread_info *oti = osd_oti_get(env);
1839         struct osd_iobuf       *iobuf = &oti->oti_iobuf;
1840         struct osd_device      *osd = osd_dt_dev(th->th_dev);
1841         struct qsd_instance    *qsd = osd->od_quota_slave;
1842         struct lquota_trans    *qtrans;
1843         ENTRY;
1844
1845         oh = container_of0(th, struct osd_thandle, ot_super);
1846
1847         remove_agents = oh->ot_remove_agents;
1848
1849         qtrans = oh->ot_quota_trans;
1850         oh->ot_quota_trans = NULL;
1851
1852         if (oh->ot_handle != NULL) {
1853                 int rc2;
1854                 handle_t *hdl = oh->ot_handle;
1855
1856                 /*
1857                  * add commit callback
1858                  * notice we don't do this in osd_trans_start()
1859                  * as underlying transaction can change during truncate
1860                  */
1861                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
1862                                          &oh->ot_jcb);
1863
1864                 LASSERT(oti->oti_txns == 1);
1865                 oti->oti_txns--;
1866
1867                 rc = dt_txn_hook_stop(env, th);
1868                 if (rc != 0)
1869                         CERROR("%s: failed in transaction hook: rc = %d\n",
1870                                osd_name(osd), rc);
1871
1872                 osd_trans_stop_cb(oh, rc);
1873                 /* hook functions might modify th_sync */
1874                 hdl->h_sync = th->th_sync;
1875
1876                 oh->ot_handle = NULL;
1877                 OSD_CHECK_SLOW_TH(oh, osd, rc2 = ldiskfs_journal_stop(hdl));
1878                 if (rc2 != 0)
1879                         CERROR("%s: failed to stop transaction: rc = %d\n",
1880                                osd_name(osd), rc2);
1881                 if (!rc)
1882                         rc = rc2;
1883         } else {
1884                 osd_trans_stop_cb(oh, th->th_result);
1885                 OBD_FREE_PTR(oh);
1886         }
1887
1888         /* inform the quota slave device that the transaction is stopping */
1889         qsd_op_end(env, qsd, qtrans);
1890
1891         /* as we want IO to journal and data IO be concurrent, we don't block
1892          * awaiting data IO completion in osd_do_bio(), instead we wait here
1893          * once transaction is submitted to the journal. all reqular requests
1894          * don't do direct IO (except read/write), thus this wait_event becomes
1895          * no-op for them.
1896          *
1897          * IMPORTANT: we have to wait till any IO submited by the thread is
1898          * completed otherwise iobuf may be corrupted by different request
1899          */
1900         wait_event(iobuf->dr_wait,
1901                        atomic_read(&iobuf->dr_numreqs) == 0);
1902         osd_fini_iobuf(osd, iobuf);
1903         if (!rc)
1904                 rc = iobuf->dr_error;
1905
1906         if (unlikely(remove_agents != 0))
1907                 osd_process_scheduled_agent_removals(env, osd);
1908
1909         /* reset OI cache for safety */
1910         oti->oti_ins_cache_used = 0;
1911
1912         sb_end_write(osd_sb(osd));
1913
1914         RETURN(rc);
1915 }
1916
1917 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
1918 {
1919         struct osd_thandle *oh = container_of0(th, struct osd_thandle,
1920                                                ot_super);
1921
1922         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
1923         LASSERT(&dcb->dcb_func != NULL);
1924         if (dcb->dcb_flags & DCB_TRANS_STOP)
1925                 list_add(&dcb->dcb_linkage, &oh->ot_stop_dcb_list);
1926         else
1927                 list_add(&dcb->dcb_linkage, &oh->ot_commit_dcb_list);
1928
1929         return 0;
1930 }
1931
1932 /*
1933  * Called just before object is freed. Releases all resources except for
1934  * object itself (that is released by osd_object_free()).
1935  *
1936  * Concurrency: no concurrent access is possible that late in object
1937  * life-cycle.
1938  */
1939 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
1940 {
1941         struct osd_object *obj   = osd_obj(l);
1942         struct inode      *inode = obj->oo_inode;
1943
1944         LINVRNT(osd_invariant(obj));
1945
1946         /*
1947          * If object is unlinked remove fid->ino mapping from object index.
1948          */
1949
1950         osd_index_fini(obj);
1951         if (inode != NULL) {
1952                 struct qsd_instance     *qsd = osd_obj2dev(obj)->od_quota_slave;
1953                 qid_t                    uid = i_uid_read(inode);
1954                 qid_t                    gid = i_gid_read(inode);
1955
1956                 iput(inode);
1957                 obj->oo_inode = NULL;
1958
1959                 if (qsd != NULL) {
1960                         struct osd_thread_info  *info = osd_oti_get(env);
1961                         struct lquota_id_info   *qi = &info->oti_qi;
1962
1963                         /* Release granted quota to master if necessary */
1964                         qi->lqi_id.qid_uid = uid;
1965                         qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
1966
1967                         qi->lqi_id.qid_uid = gid;
1968                         qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
1969
1970                         qi->lqi_id.qid_uid = i_projid_read(inode);
1971                         qsd_op_adjust(env, qsd, &qi->lqi_id, PRJQUOTA);
1972                 }
1973         }
1974 }
1975
1976 /*
1977  * Concurrency: ->loo_object_release() is called under site spin-lock.
1978  */
1979 static void osd_object_release(const struct lu_env *env,
1980                                struct lu_object *l)
1981 {
1982         struct osd_object *o = osd_obj(l);
1983         /* nobody should be releasing a non-destroyed object with nlink=0
1984          * the API allows this, but ldiskfs doesn't like and then report
1985          * this inode as deleted */
1986         if (unlikely(!o->oo_destroyed && o->oo_inode && o->oo_inode->i_nlink == 0))
1987                 LBUG();
1988 }
1989
1990 /*
1991  * Concurrency: shouldn't matter.
1992  */
1993 static int osd_object_print(const struct lu_env *env, void *cookie,
1994                             lu_printer_t p, const struct lu_object *l)
1995 {
1996         struct osd_object *o = osd_obj(l);
1997         struct iam_descr  *d;
1998
1999         if (o->oo_dir != NULL)
2000                 d = o->oo_dir->od_container.ic_descr;
2001         else
2002                 d = NULL;
2003         return (*p)(env, cookie,
2004                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
2005                     o, o->oo_inode,
2006                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
2007                     o->oo_inode ? o->oo_inode->i_generation : 0,
2008                     d ? d->id_ops->id_name : "plain");
2009 }
2010
2011 /*
2012  * Concurrency: shouldn't matter.
2013  */
2014 int osd_statfs(const struct lu_env *env, struct dt_device *d,
2015                struct obd_statfs *sfs)
2016 {
2017         struct osd_device       *osd = osd_dt_dev(d);
2018         struct super_block      *sb = osd_sb(osd);
2019         struct kstatfs          *ksfs;
2020         __u64                    reserved;
2021         int                      result = 0;
2022
2023         if (unlikely(osd->od_mnt == NULL))
2024                 return -EINPROGRESS;
2025
2026         /* osd_lproc.c call this without env, allocate ksfs for that case */
2027         if (unlikely(env == NULL)) {
2028                 OBD_ALLOC_PTR(ksfs);
2029                 if (ksfs == NULL)
2030                         return -ENOMEM;
2031         } else {
2032                 ksfs = &osd_oti_get(env)->oti_ksfs;
2033         }
2034
2035         result = sb->s_op->statfs(sb->s_root, ksfs);
2036         if (result)
2037                 goto out;
2038
2039         statfs_pack(sfs, ksfs);
2040         if (unlikely(sb->s_flags & MS_RDONLY))
2041                 sfs->os_state |= OS_STATE_READONLY;
2042         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb,
2043                                          LDISKFS_FEATURE_INCOMPAT_EXTENTS))
2044                 sfs->os_maxbytes = sb->s_maxbytes;
2045         else
2046                 sfs->os_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2047
2048         /*
2049          * Reserve some space so to avoid fragmenting the filesystem too much.
2050          * Fragmentation not only impacts performance, but can also increase
2051          * metadata overhead significantly, causing grant calculation to be
2052          * wrong.
2053          *
2054          * Reserve 0.78% of total space, at least 8MB for small filesystems.
2055          */
2056         CLASSERT(OSD_STATFS_RESERVED > LDISKFS_MAX_BLOCK_SIZE);
2057         reserved = OSD_STATFS_RESERVED >> sb->s_blocksize_bits;
2058         if (likely(sfs->os_blocks >= reserved << OSD_STATFS_RESERVED_SHIFT))
2059                 reserved = sfs->os_blocks >> OSD_STATFS_RESERVED_SHIFT;
2060
2061         sfs->os_blocks -= reserved;
2062         sfs->os_bfree  -= min(reserved, sfs->os_bfree);
2063         sfs->os_bavail -= min(reserved, sfs->os_bavail);
2064
2065 out:
2066         if (unlikely(env == NULL))
2067                 OBD_FREE_PTR(ksfs);
2068         return result;
2069 }
2070
2071 /**
2072  * Estimate space needed for file creations. We assume the largest filename
2073  * which is 2^64 - 1, hence a filename of 20 chars.
2074  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
2075  */
2076 #ifdef __LDISKFS_DIR_REC_LEN
2077 #define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
2078 #else
2079 #define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
2080 #endif
2081
2082 /*
2083  * Concurrency: doesn't access mutable data.
2084  */
2085 static void osd_conf_get(const struct lu_env *env,
2086                          const struct dt_device *dev,
2087                          struct dt_device_param *param)
2088 {
2089         struct super_block *sb = osd_sb(osd_dt_dev(dev));
2090         int                ea_overhead;
2091
2092         /*
2093          * XXX should be taken from not-yet-existing fs abstraction layer.
2094          */
2095         param->ddp_max_name_len = LDISKFS_NAME_LEN;
2096         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
2097         param->ddp_symlink_max  = sb->s_blocksize;
2098         param->ddp_mount_type     = LDD_MT_LDISKFS;
2099         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EXTENTS))
2100                 param->ddp_maxbytes = sb->s_maxbytes;
2101         else
2102                 param->ddp_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2103         /* inode are statically allocated, so per-inode space consumption
2104          * is the space consumed by the directory entry */
2105         param->ddp_inodespace     = PER_OBJ_USAGE;
2106         /* EXT_INIT_MAX_LEN is the theoretical maximum extent size  (32k blocks
2107          * = 128MB) which is unlikely to be hit in real life. Report a smaller
2108          * maximum length to not under count the actual number of extents
2109          * needed for writing a file. */
2110         param->ddp_max_extent_blks = EXT_INIT_MAX_LEN >> 2;
2111         /* worst-case extent insertion metadata overhead */
2112         param->ddp_extent_tax = 6 * LDISKFS_BLOCK_SIZE(sb);
2113         param->ddp_mntopts      = 0;
2114         if (test_opt(sb, XATTR_USER))
2115                 param->ddp_mntopts |= MNTOPT_USERXATTR;
2116         if (test_opt(sb, POSIX_ACL))
2117                 param->ddp_mntopts |= MNTOPT_ACL;
2118
2119         /* LOD might calculate the max stripe count based on max_ea_size,
2120          * so we need take account in the overhead as well,
2121          * xattr_header + magic + xattr_entry_head */
2122         ea_overhead = sizeof(struct ldiskfs_xattr_header) + sizeof(__u32) +
2123                       LDISKFS_XATTR_LEN(XATTR_NAME_MAX_LEN);
2124
2125 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
2126         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EA_INODE))
2127                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE -
2128                                                                 ea_overhead;
2129         else
2130 #endif
2131                 param->ddp_max_ea_size = sb->s_blocksize - ea_overhead;
2132
2133         /* Preferred RPC size for efficient disk IO.  4MB shows good
2134          * all-around performance for ldiskfs, but use bigalloc chunk size
2135          * by default if larger. */
2136 #if defined(LDISKFS_CLUSTER_SIZE)
2137         if (LDISKFS_CLUSTER_SIZE(sb) > DT_DEF_BRW_SIZE)
2138                 param->ddp_brw_size = LDISKFS_CLUSTER_SIZE(sb);
2139         else
2140 #endif
2141                 param->ddp_brw_size = DT_DEF_BRW_SIZE;
2142 }
2143
2144 /*
2145  * Concurrency: shouldn't matter.
2146  */
2147 static int osd_sync(const struct lu_env *env, struct dt_device *d)
2148 {
2149         int rc;
2150
2151         CDEBUG(D_CACHE, "%s: syncing OSD\n", osd_dt_dev(d)->od_svname);
2152
2153         rc = ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
2154
2155         CDEBUG(D_CACHE, "%s: synced OSD: rc = %d\n", osd_dt_dev(d)->od_svname,
2156                rc);
2157
2158         return rc;
2159 }
2160
2161 /**
2162  * Start commit for OSD device.
2163  *
2164  * An implementation of dt_commit_async method for OSD device.
2165  * Asychronously starts underlayng fs sync and thereby a transaction
2166  * commit.
2167  *
2168  * \param env environment
2169  * \param d dt device
2170  *
2171  * \see dt_device_operations
2172  */
2173 static int osd_commit_async(const struct lu_env *env,
2174                             struct dt_device *d)
2175 {
2176         struct super_block *s = osd_sb(osd_dt_dev(d));
2177         ENTRY;
2178
2179         CDEBUG(D_HA, "%s: async commit OSD\n", osd_dt_dev(d)->od_svname);
2180         RETURN(s->s_op->sync_fs(s, 0));
2181 }
2182
2183 /* Our own copy of the set readonly functions if present, or NU if not. */
2184 static int (*priv_dev_set_rdonly)(struct block_device *bdev);
2185 static int (*priv_dev_check_rdonly)(struct block_device *bdev);
2186 /* static int (*priv_dev_clear_rdonly)(struct block_device *bdev); */
2187
2188 /*
2189  * Concurrency: shouldn't matter.
2190  */
2191 static int osd_ro(const struct lu_env *env, struct dt_device *d)
2192 {
2193         struct super_block *sb = osd_sb(osd_dt_dev(d));
2194         struct block_device *dev = sb->s_bdev;
2195         int rc = -EOPNOTSUPP;
2196         ENTRY;
2197
2198         if (priv_dev_set_rdonly) {
2199                 struct block_device *jdev = LDISKFS_SB(sb)->journal_bdev;
2200
2201                 rc = 0;
2202                 CERROR("*** setting %s read-only ***\n",
2203                        osd_dt_dev(d)->od_svname);
2204
2205                 if (sb->s_op->freeze_fs) {
2206                         rc = sb->s_op->freeze_fs(sb);
2207                         if (rc)
2208                                 goto out;
2209                 }
2210
2211                 if (jdev && (jdev != dev)) {
2212                         CDEBUG(D_IOCTL | D_HA, "set journal dev %lx rdonly\n",
2213                                (long)jdev);
2214                         priv_dev_set_rdonly(jdev);
2215                 }
2216                 CDEBUG(D_IOCTL | D_HA, "set dev %lx rdonly\n", (long)dev);
2217                 priv_dev_set_rdonly(dev);
2218
2219                 if (sb->s_op->unfreeze_fs)
2220                         sb->s_op->unfreeze_fs(sb);
2221         }
2222
2223 out:
2224         if (rc)
2225                 CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
2226                        osd_dt_dev(d)->od_svname, (long)dev, rc);
2227
2228         RETURN(rc);
2229 }
2230
2231 /**
2232  * Note: we do not count into QUOTA here.
2233  * If we mount with --data_journal we may need more.
2234  */
2235 const int osd_dto_credits_noquota[DTO_NR] = {
2236         /**
2237          * Insert.
2238          * INDEX_EXTRA_TRANS_BLOCKS(8) +
2239          * SINGLEDATA_TRANS_BLOCKS(8)
2240          * XXX Note: maybe iam need more, since iam have more level than
2241          *           EXT3 htree.
2242          */
2243         [DTO_INDEX_INSERT]  = 16,
2244         /**
2245          * Delete
2246          * just modify a single entry, probably merge few within a block
2247          */
2248         [DTO_INDEX_DELETE]  = 1,
2249         /**
2250          * Used for OI scrub
2251          */
2252         [DTO_INDEX_UPDATE]  = 16,
2253         /**
2254          * 4(inode, inode bits, groups, GDT)
2255          *   notice: OI updates are counted separately with DTO_INDEX_INSERT
2256          */
2257         [DTO_OBJECT_CREATE] = 4,
2258         /**
2259          * 4(inode, inode bits, groups, GDT)
2260          *   notice: OI updates are counted separately with DTO_INDEX_DELETE
2261          */
2262         [DTO_OBJECT_DELETE] = 4,
2263         /**
2264          * Attr set credits (inode)
2265          */
2266         [DTO_ATTR_SET_BASE] = 1,
2267         /**
2268          * Xattr set. The same as xattr of EXT3.
2269          * DATA_TRANS_BLOCKS(14)
2270          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
2271          * are also counted in. Do not know why?
2272          */
2273         [DTO_XATTR_SET]     = 14,
2274         /**
2275          * credits for inode change during write.
2276          */
2277         [DTO_WRITE_BASE]    = 3,
2278         /**
2279          * credits for single block write.
2280          */
2281         [DTO_WRITE_BLOCK]   = 14,
2282         /**
2283          * Attr set credits for chown.
2284          * This is extra credits for setattr, and it is null without quota
2285          */
2286         [DTO_ATTR_SET_CHOWN] = 0
2287 };
2288
2289 static const struct dt_device_operations osd_dt_ops = {
2290         .dt_root_get       = osd_root_get,
2291         .dt_statfs         = osd_statfs,
2292         .dt_trans_create   = osd_trans_create,
2293         .dt_trans_start    = osd_trans_start,
2294         .dt_trans_stop     = osd_trans_stop,
2295         .dt_trans_cb_add   = osd_trans_cb_add,
2296         .dt_conf_get       = osd_conf_get,
2297         .dt_sync           = osd_sync,
2298         .dt_ro             = osd_ro,
2299         .dt_commit_async   = osd_commit_async,
2300 };
2301
2302 static void osd_read_lock(const struct lu_env *env, struct dt_object *dt,
2303                           unsigned role)
2304 {
2305         struct osd_object *obj = osd_dt_obj(dt);
2306         struct osd_thread_info *oti = osd_oti_get(env);
2307
2308         LINVRNT(osd_invariant(obj));
2309
2310         LASSERT(obj->oo_owner != env);
2311         down_read_nested(&obj->oo_sem, role);
2312
2313         LASSERT(obj->oo_owner == NULL);
2314         oti->oti_r_locks++;
2315 }
2316
2317 static void osd_write_lock(const struct lu_env *env, struct dt_object *dt,
2318                            unsigned role)
2319 {
2320         struct osd_object *obj = osd_dt_obj(dt);
2321         struct osd_thread_info *oti = osd_oti_get(env);
2322
2323         LINVRNT(osd_invariant(obj));
2324
2325         LASSERT(obj->oo_owner != env);
2326         down_write_nested(&obj->oo_sem, role);
2327
2328         LASSERT(obj->oo_owner == NULL);
2329         obj->oo_owner = env;
2330         oti->oti_w_locks++;
2331 }
2332
2333 static void osd_read_unlock(const struct lu_env *env, struct dt_object *dt)
2334 {
2335         struct osd_object *obj = osd_dt_obj(dt);
2336         struct osd_thread_info *oti = osd_oti_get(env);
2337
2338         LINVRNT(osd_invariant(obj));
2339
2340         LASSERT(oti->oti_r_locks > 0);
2341         oti->oti_r_locks--;
2342         up_read(&obj->oo_sem);
2343 }
2344
2345 static void osd_write_unlock(const struct lu_env *env, struct dt_object *dt)
2346 {
2347         struct osd_object *obj = osd_dt_obj(dt);
2348         struct osd_thread_info *oti = osd_oti_get(env);
2349
2350         LINVRNT(osd_invariant(obj));
2351
2352         LASSERT(obj->oo_owner == env);
2353         LASSERT(oti->oti_w_locks > 0);
2354         oti->oti_w_locks--;
2355         obj->oo_owner = NULL;
2356         up_write(&obj->oo_sem);
2357 }
2358
2359 static int osd_write_locked(const struct lu_env *env, struct dt_object *dt)
2360 {
2361         struct osd_object *obj = osd_dt_obj(dt);
2362
2363         LINVRNT(osd_invariant(obj));
2364
2365         return obj->oo_owner == env;
2366 }
2367
2368 static struct timespec *osd_inode_time(const struct lu_env *env,
2369                                        struct inode *inode, __u64 seconds)
2370 {
2371         struct osd_thread_info  *oti = osd_oti_get(env);
2372         struct timespec         *t   = &oti->oti_time;
2373
2374         t->tv_sec = seconds;
2375         t->tv_nsec = 0;
2376         *t = timespec_trunc(*t, inode->i_sb->s_time_gran);
2377         return t;
2378 }
2379
2380 static void osd_inode_getattr(const struct lu_env *env,
2381                               struct inode *inode, struct lu_attr *attr)
2382 {
2383         attr->la_valid  |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
2384                            LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
2385                            LA_PROJID | LA_FLAGS | LA_NLINK | LA_RDEV |
2386                            LA_BLKSIZE | LA_TYPE;
2387
2388         attr->la_atime   = LTIME_S(inode->i_atime);
2389         attr->la_mtime   = LTIME_S(inode->i_mtime);
2390         attr->la_ctime   = LTIME_S(inode->i_ctime);
2391         attr->la_mode    = inode->i_mode;
2392         attr->la_size    = i_size_read(inode);
2393         attr->la_blocks  = inode->i_blocks;
2394         attr->la_uid     = i_uid_read(inode);
2395         attr->la_gid     = i_gid_read(inode);
2396         attr->la_projid  = i_projid_read(inode);
2397         attr->la_flags   = ll_inode_to_ext_flags(inode->i_flags);
2398         attr->la_nlink   = inode->i_nlink;
2399         attr->la_rdev    = inode->i_rdev;
2400         attr->la_blksize = 1 << inode->i_blkbits;
2401         attr->la_blkbits = inode->i_blkbits;
2402         /*
2403          * Ext4 did not transfer inherit flags from raw inode
2404          * to inode flags, and ext4 internally test raw inode
2405          * @i_flags directly. Instead of patching ext4, we do it here.
2406          */
2407         if (LDISKFS_I(inode)->i_flags & LUSTRE_PROJINHERIT_FL)
2408                 attr->la_flags |= LUSTRE_PROJINHERIT_FL;
2409 }
2410
2411 static int osd_attr_get(const struct lu_env *env,
2412                         struct dt_object *dt,
2413                         struct lu_attr *attr)
2414 {
2415         struct osd_object *obj = osd_dt_obj(dt);
2416
2417         if (unlikely(!dt_object_exists(dt)))
2418                 return -ENOENT;
2419         if (unlikely(obj->oo_destroyed))
2420                 return -ENOENT;
2421
2422         LASSERT(!dt_object_remote(dt));
2423         LINVRNT(osd_invariant(obj));
2424
2425         spin_lock(&obj->oo_guard);
2426         osd_inode_getattr(env, obj->oo_inode, attr);
2427         if (obj->oo_lma_flags & LUSTRE_ORPHAN_FL)
2428                 attr->la_flags |= LUSTRE_ORPHAN_FL;
2429         spin_unlock(&obj->oo_guard);
2430
2431         return 0;
2432 }
2433
2434 static int osd_declare_attr_qid(const struct lu_env *env,
2435                                 struct osd_object *obj,
2436                                 struct osd_thandle *oh, long long bspace,
2437                                 qid_t old_id, qid_t new_id, bool enforce,
2438                                 unsigned type, bool ignore_edquot)
2439 {
2440         int rc;
2441         struct osd_thread_info *info = osd_oti_get(env);
2442         struct lquota_id_info  *qi = &info->oti_qi;
2443
2444         qi->lqi_type = type;
2445         /* inode accounting */
2446         qi->lqi_is_blk = false;
2447
2448         /* one more inode for the new id ... */
2449         qi->lqi_id.qid_uid = new_id;
2450         qi->lqi_space      = 1;
2451         /* Reserve credits for the new id */
2452         rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
2453         if (ignore_edquot && (rc == -EDQUOT || rc == -EINPROGRESS))
2454                 rc = 0;
2455         if (rc)
2456                 RETURN(rc);
2457
2458         /* and one less inode for the current id */
2459         qi->lqi_id.qid_uid = old_id;
2460         qi->lqi_space      = -1;
2461         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2462         if (ignore_edquot && (rc == -EDQUOT || rc == -EINPROGRESS))
2463                 rc = 0;
2464         if (rc)
2465                 RETURN(rc);
2466
2467         /* block accounting */
2468         qi->lqi_is_blk = true;
2469
2470         /* more blocks for the new id ... */
2471         qi->lqi_id.qid_uid = new_id;
2472         qi->lqi_space      = bspace;
2473         /*
2474          * Credits for the new uid has been reserved, re-use "obj"
2475          * to save credit reservation.
2476          */
2477         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2478         if (ignore_edquot && (rc == -EDQUOT || rc == -EINPROGRESS))
2479                 rc = 0;
2480         if (rc)
2481                 RETURN(rc);
2482
2483         /* and finally less blocks for the current uid */
2484         qi->lqi_id.qid_uid = old_id;
2485         qi->lqi_space      = -bspace;
2486         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2487         if (ignore_edquot && (rc == -EDQUOT || rc == -EINPROGRESS))
2488                 rc = 0;
2489
2490         RETURN(rc);
2491 }
2492
2493 static int osd_declare_attr_set(const struct lu_env *env,
2494                                 struct dt_object *dt,
2495                                 const struct lu_attr *attr,
2496                                 struct thandle *handle)
2497 {
2498         struct osd_thandle     *oh;
2499         struct osd_object      *obj;
2500         qid_t                   uid;
2501         qid_t                   gid;
2502         long long               bspace;
2503         int                     rc = 0;
2504         bool                    enforce;
2505         ENTRY;
2506
2507         LASSERT(dt != NULL);
2508         LASSERT(handle != NULL);
2509
2510         obj = osd_dt_obj(dt);
2511         LASSERT(osd_invariant(obj));
2512
2513         oh = container_of0(handle, struct osd_thandle, ot_super);
2514         LASSERT(oh->ot_handle == NULL);
2515
2516         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
2517                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2518
2519         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
2520                              osd_dto_credits_noquota[DTO_XATTR_SET]);
2521
2522         if (attr == NULL || obj->oo_inode == NULL)
2523                 RETURN(rc);
2524
2525         bspace   = obj->oo_inode->i_blocks << 9;
2526         bspace   = toqb(bspace);
2527
2528         /* Changing ownership is always preformed by super user, it should not
2529          * fail with EDQUOT unless required explicitly.
2530          *
2531          * We still need to call the osd_declare_qid() to calculate the journal
2532          * credits for updating quota accounting files and to trigger quota
2533          * space adjustment once the operation is completed.*/
2534         if (attr->la_valid & LA_UID || attr->la_valid & LA_GID) {
2535                 bool ignore_edquot = !(attr->la_flags & LUSTRE_SET_SYNC_FL);
2536
2537                 if (!ignore_edquot)
2538                         CDEBUG(D_QUOTA, "%s: enforce quota on UID %u, GID %u"
2539                                "(the quota space is %lld)\n",
2540                                obj->oo_inode->i_sb->s_id, attr->la_uid,
2541                                attr->la_gid, bspace);
2542
2543                 /* USERQUOTA */
2544                 uid = i_uid_read(obj->oo_inode);
2545                 enforce = (attr->la_valid & LA_UID) && (attr->la_uid != uid);
2546                 rc = osd_declare_attr_qid(env, obj, oh, bspace, uid,
2547                                           attr->la_uid, enforce, USRQUOTA,
2548                                           true);
2549                 if (rc)
2550                         RETURN(rc);
2551
2552                 gid = i_gid_read(obj->oo_inode);
2553                 enforce = (attr->la_valid & LA_GID) && (attr->la_gid != gid);
2554                 rc = osd_declare_attr_qid(env, obj, oh, bspace,
2555                                           i_gid_read(obj->oo_inode),
2556                                           attr->la_gid, enforce, GRPQUOTA,
2557                                           ignore_edquot);
2558                 if (rc)
2559                         RETURN(rc);
2560
2561         }
2562 #ifdef HAVE_PROJECT_QUOTA
2563         if (attr->la_valid & LA_PROJID) {
2564                 __u32 projid = i_projid_read(obj->oo_inode);
2565                 enforce = (attr->la_valid & LA_PROJID) &&
2566                                         (attr->la_projid != projid);
2567                 rc = osd_declare_attr_qid(env, obj, oh, bspace,
2568                                           (qid_t)projid, (qid_t)attr->la_projid,
2569                                           enforce, PRJQUOTA, true);
2570                 if (rc)
2571                         RETURN(rc);
2572         }
2573 #endif
2574         RETURN(rc);
2575 }
2576
2577 static int osd_inode_setattr(const struct lu_env *env,
2578                              struct inode *inode, const struct lu_attr *attr)
2579 {
2580         __u64 bits = attr->la_valid;
2581
2582         /* Only allow set size for regular file */
2583         if (!S_ISREG(inode->i_mode))
2584                 bits &= ~(LA_SIZE | LA_BLOCKS);
2585
2586         if (bits == 0)
2587                 return 0;
2588
2589         if (bits & LA_ATIME)
2590                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
2591         if (bits & LA_CTIME)
2592                 inode->i_ctime  = *osd_inode_time(env, inode, attr->la_ctime);
2593         if (bits & LA_MTIME)
2594                 inode->i_mtime  = *osd_inode_time(env, inode, attr->la_mtime);
2595         if (bits & LA_SIZE) {
2596                 spin_lock(&inode->i_lock);
2597                 LDISKFS_I(inode)->i_disksize = attr->la_size;
2598                 i_size_write(inode, attr->la_size);
2599                 spin_unlock(&inode->i_lock);
2600         }
2601
2602         /* OSD should not change "i_blocks" which is used by quota.
2603          * "i_blocks" should be changed by ldiskfs only. */
2604         if (bits & LA_MODE)
2605                 inode->i_mode = (inode->i_mode & S_IFMT) |
2606                                 (attr->la_mode & ~S_IFMT);
2607         if (bits & LA_UID)
2608                 i_uid_write(inode, attr->la_uid);
2609         if (bits & LA_GID)
2610                 i_gid_write(inode, attr->la_gid);
2611         if (bits & LA_PROJID)
2612                 i_projid_write(inode, attr->la_projid);
2613         if (bits & LA_NLINK)
2614                 set_nlink(inode, attr->la_nlink);
2615         if (bits & LA_RDEV)
2616                 inode->i_rdev = attr->la_rdev;
2617
2618         if (bits & LA_FLAGS) {
2619                 /* always keep S_NOCMTIME */
2620                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
2621                                  S_NOCMTIME;
2622                 /*
2623                  * Ext4 did not transfer inherit flags from
2624                  * @inode->i_flags to raw inode i_flags when writing
2625                  * flags, we do it explictly here.
2626                  */
2627                 if (attr->la_flags & LUSTRE_PROJINHERIT_FL)
2628                         LDISKFS_I(inode)->i_flags |= LUSTRE_PROJINHERIT_FL;
2629                 else
2630                         LDISKFS_I(inode)->i_flags &= ~LUSTRE_PROJINHERIT_FL;
2631         }
2632         return 0;
2633 }
2634
2635 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr)
2636 {
2637         int rc;
2638
2639         if ((attr->la_valid & LA_UID && attr->la_uid != i_uid_read(inode)) ||
2640             (attr->la_valid & LA_GID && attr->la_gid != i_gid_read(inode))) {
2641                 struct iattr    iattr;
2642
2643                 ll_vfs_dq_init(inode);
2644                 iattr.ia_valid = 0;
2645                 if (attr->la_valid & LA_UID)
2646                         iattr.ia_valid |= ATTR_UID;
2647                 if (attr->la_valid & LA_GID)
2648                         iattr.ia_valid |= ATTR_GID;
2649                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
2650                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
2651
2652                 rc = ll_vfs_dq_transfer(inode, &iattr);
2653                 if (rc) {
2654                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
2655                                "enforcement enabled on the ldiskfs "
2656                                "filesystem?\n", inode->i_sb->s_id, rc);
2657                         return rc;
2658                 }
2659         }
2660
2661 #ifdef HAVE_PROJECT_QUOTA
2662         /* Handle project id transfer here properly */
2663         if (attr->la_valid & LA_PROJID &&
2664             attr->la_projid != i_projid_read(inode)) {
2665                 rc = __ldiskfs_ioctl_setproject(inode, attr->la_projid);
2666                 if (rc) {
2667                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
2668                                "enforcement enabled on the ldiskfs "
2669                                "filesystem?\n", inode->i_sb->s_id, rc);
2670                         return rc;
2671                 }
2672         }
2673 #endif
2674         return 0;
2675 }
2676
2677 static int osd_attr_set(const struct lu_env *env,
2678                         struct dt_object *dt,
2679                         const struct lu_attr *attr,
2680                         struct thandle *handle)
2681 {
2682         struct osd_object *obj = osd_dt_obj(dt);
2683         struct inode      *inode;
2684         int rc;
2685
2686         if (!dt_object_exists(dt))
2687                 return -ENOENT;
2688
2689         LASSERT(handle != NULL);
2690         LASSERT(!dt_object_remote(dt));
2691         LASSERT(osd_invariant(obj));
2692
2693         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
2694
2695         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING)) {
2696                 struct osd_thread_info  *oti  = osd_oti_get(env);
2697                 const struct lu_fid     *fid0 = lu_object_fid(&dt->do_lu);
2698                 struct lu_fid           *fid1 = &oti->oti_fid;
2699                 struct osd_inode_id     *id   = &oti->oti_id;
2700                 struct iam_path_descr   *ipd;
2701                 struct iam_container    *bag;
2702                 struct osd_thandle      *oh;
2703                 int                      rc;
2704
2705                 fid_cpu_to_be(fid1, fid0);
2706                 memset(id, 1, sizeof(*id));
2707                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
2708                                   fid0)->oi_dir.od_container;
2709                 ipd = osd_idx_ipd_get(env, bag);
2710                 if (unlikely(ipd == NULL))
2711                         RETURN(-ENOMEM);
2712
2713                 oh = container_of0(handle, struct osd_thandle, ot_super);
2714                 rc = iam_update(oh->ot_handle, bag, (const struct iam_key *)fid1,
2715                                 (const struct iam_rec *)id, ipd);
2716                 osd_ipd_put(env, bag, ipd);
2717                 return(rc > 0 ? 0 : rc);
2718         }
2719
2720         inode = obj->oo_inode;
2721
2722         rc = osd_quota_transfer(inode, attr);
2723         if (rc)
2724                 return rc;
2725
2726         spin_lock(&obj->oo_guard);
2727         rc = osd_inode_setattr(env, inode, attr);
2728         spin_unlock(&obj->oo_guard);
2729         if (rc != 0)
2730                 GOTO(out, rc);
2731
2732         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2733
2734         if (!(attr->la_valid & LA_FLAGS))
2735                 GOTO(out, rc);
2736
2737         /* Let's check if there are extra flags need to be set into LMA */
2738         if (attr->la_flags & LUSTRE_LMA_FL_MASKS) {
2739                 struct osd_thread_info *info = osd_oti_get(env);
2740                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
2741
2742                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
2743                                  &info->oti_ost_attrs);
2744                 if (rc)
2745                         GOTO(out, rc);
2746
2747                 lma->lma_incompat |=
2748                         lustre_to_lma_flags(attr->la_flags);
2749                 lustre_lma_swab(lma);
2750                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA,
2751                                      lma, sizeof(*lma), XATTR_REPLACE);
2752                 if (rc != 0) {
2753                         struct osd_device *osd = osd_obj2dev(obj);
2754
2755                         CWARN("%s: set "DFID" lma flags %u failed: rc = %d\n",
2756                               osd_name(osd), PFID(lu_object_fid(&dt->do_lu)),
2757                               lma->lma_incompat, rc);
2758                 } else {
2759                         obj->oo_lma_flags =
2760                                 attr->la_flags & LUSTRE_LMA_FL_MASKS;
2761                 }
2762                 osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
2763         }
2764 out:
2765         osd_trans_exec_check(env, handle, OSD_OT_ATTR_SET);
2766
2767         return rc;
2768 }
2769
2770 static struct dentry *osd_child_dentry_get(const struct lu_env *env,
2771                                            struct osd_object *obj,
2772                                            const char *name, const int namelen)
2773 {
2774         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
2775 }
2776
2777 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
2778                       umode_t mode, struct dt_allocation_hint *hint,
2779                       struct thandle *th)
2780 {
2781         int result;
2782         struct osd_device  *osd = osd_obj2dev(obj);
2783         struct osd_thandle *oth;
2784         struct dt_object   *parent = NULL;
2785         struct inode       *inode;
2786
2787         LINVRNT(osd_invariant(obj));
2788         LASSERT(obj->oo_inode == NULL);
2789         LASSERT(obj->oo_hl_head == NULL);
2790
2791         if (S_ISDIR(mode) && ldiskfs_pdo) {
2792                 obj->oo_hl_head =ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
2793                 if (obj->oo_hl_head == NULL)
2794                         return -ENOMEM;
2795         }
2796
2797         oth = container_of(th, struct osd_thandle, ot_super);
2798         LASSERT(oth->ot_handle->h_transaction != NULL);
2799
2800         if (hint != NULL && hint->dah_parent != NULL &&
2801             !dt_object_remote(hint->dah_parent))
2802                 parent = hint->dah_parent;
2803
2804         inode = ldiskfs_create_inode(oth->ot_handle,
2805                                      parent ? osd_dt_obj(parent)->oo_inode :
2806                                               osd_sb(osd)->s_root->d_inode,
2807                                      mode);
2808         if (!IS_ERR(inode)) {
2809                 /* Do not update file c/mtime in ldiskfs. */
2810                 inode->i_flags |= S_NOCMTIME;
2811
2812                 /* For new created object, it must be consistent,
2813                  * and it is unnecessary to scrub against it. */
2814                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
2815
2816                 obj->oo_inode = inode;
2817                 result = 0;
2818         } else {
2819                 if (obj->oo_hl_head != NULL) {
2820                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
2821                         obj->oo_hl_head = NULL;
2822                 }
2823                 result = PTR_ERR(inode);
2824         }
2825         LINVRNT(osd_invariant(obj));
2826         return result;
2827 }
2828
2829 enum {
2830         OSD_NAME_LEN = 255
2831 };
2832
2833 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
2834                      struct lu_attr *attr,
2835                      struct dt_allocation_hint *hint,
2836                      struct dt_object_format *dof,
2837                      struct thandle *th)
2838 {
2839         int result;
2840         struct osd_thandle *oth;
2841         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX | S_ISGID));
2842
2843         LASSERT(S_ISDIR(attr->la_mode));
2844
2845         oth = container_of(th, struct osd_thandle, ot_super);
2846         LASSERT(oth->ot_handle->h_transaction != NULL);
2847         result = osd_mkfile(info, obj, mode, hint, th);
2848
2849         return result;
2850 }
2851
2852 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
2853                         struct lu_attr *attr,
2854                         struct dt_allocation_hint *hint,
2855                         struct dt_object_format *dof,
2856                         struct thandle *th)
2857 {
2858         int result;
2859         struct osd_thandle *oth;
2860         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
2861
2862         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
2863
2864         LASSERT(S_ISREG(attr->la_mode));
2865
2866         oth = container_of(th, struct osd_thandle, ot_super);
2867         LASSERT(oth->ot_handle->h_transaction != NULL);
2868
2869         result = osd_mkfile(info, obj, mode, hint, th);
2870         if (result == 0) {
2871                 LASSERT(obj->oo_inode != NULL);
2872                 if (feat->dif_flags & DT_IND_VARKEY)
2873                         result = iam_lvar_create(obj->oo_inode,
2874                                                  feat->dif_keysize_max,
2875                                                  feat->dif_ptrsize,
2876                                                  feat->dif_recsize_max,
2877                                                  oth->ot_handle);
2878                 else
2879                         result = iam_lfix_create(obj->oo_inode,
2880                                                  feat->dif_keysize_max,
2881                                                  feat->dif_ptrsize,
2882                                                  feat->dif_recsize_max,
2883                                                  oth->ot_handle);
2884
2885         }
2886         return result;
2887 }
2888
2889 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
2890                      struct lu_attr *attr,
2891                      struct dt_allocation_hint *hint,
2892                      struct dt_object_format *dof,
2893                      struct thandle *th)
2894 {
2895         LASSERT(S_ISREG(attr->la_mode));
2896         return osd_mkfile(info, obj, (attr->la_mode &
2897                                (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2898 }
2899
2900 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
2901                      struct lu_attr *attr,
2902                      struct dt_allocation_hint *hint,
2903                      struct dt_object_format *dof,
2904                      struct thandle *th)
2905 {
2906         LASSERT(S_ISLNK(attr->la_mode));
2907         return osd_mkfile(info, obj, (attr->la_mode &
2908                               (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2909 }
2910
2911 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
2912                      struct lu_attr *attr,
2913                      struct dt_allocation_hint *hint,
2914                      struct dt_object_format *dof,
2915                      struct thandle *th)
2916 {
2917         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
2918         int result;
2919
2920         LINVRNT(osd_invariant(obj));
2921         LASSERT(obj->oo_inode == NULL);
2922         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
2923                 S_ISFIFO(mode) || S_ISSOCK(mode));
2924
2925         result = osd_mkfile(info, obj, mode, hint, th);
2926         if (result == 0) {
2927                 LASSERT(obj->oo_inode != NULL);
2928                 /*
2929                  * This inode should be marked dirty for i_rdev.  Currently
2930                  * that is done in the osd_attr_init().
2931                  */
2932                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
2933                                    attr->la_rdev);
2934         }
2935         LINVRNT(osd_invariant(obj));
2936         return result;
2937 }
2938
2939 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
2940                               struct lu_attr *,
2941                               struct dt_allocation_hint *hint,
2942                               struct dt_object_format *dof,
2943                               struct thandle *);
2944
2945 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
2946 {
2947         osd_obj_type_f result;
2948
2949         switch (type) {
2950         case DFT_DIR:
2951                 result = osd_mkdir;
2952                 break;
2953         case DFT_REGULAR:
2954                 result = osd_mkreg;
2955                 break;
2956         case DFT_SYM:
2957                 result = osd_mksym;
2958                 break;
2959         case DFT_NODE:
2960                 result = osd_mknod;
2961                 break;
2962         case DFT_INDEX:
2963                 result = osd_mk_index;
2964                 break;
2965
2966         default:
2967                 LBUG();
2968                 break;
2969         }
2970         return result;
2971 }
2972
2973
2974 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
2975                         struct dt_object *parent, struct dt_object *child,
2976                         umode_t child_mode)
2977 {
2978         LASSERT(ah);
2979
2980         ah->dah_parent = parent;
2981         ah->dah_mode = child_mode;
2982
2983         if (parent != NULL && !dt_object_remote(parent)) {
2984                 /* will help to find FID->ino at dt_insert("..") */
2985                 struct osd_object *pobj = osd_dt_obj(parent);
2986                 osd_idc_find_and_init(env, osd_obj2dev(pobj), pobj);
2987         }
2988 }
2989
2990 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
2991                           struct lu_attr *attr, struct dt_object_format *dof)
2992 {
2993         struct inode   *inode = obj->oo_inode;
2994         __u64           valid = attr->la_valid;
2995         int             result;
2996
2997         attr->la_valid &= ~(LA_TYPE | LA_MODE);
2998
2999         if (dof->dof_type != DFT_NODE)
3000                 attr->la_valid &= ~LA_RDEV;
3001         if ((valid & LA_ATIME) && (attr->la_atime == LTIME_S(inode->i_atime)))
3002                 attr->la_valid &= ~LA_ATIME;
3003         if ((valid & LA_CTIME) && (attr->la_ctime == LTIME_S(inode->i_ctime)))
3004                 attr->la_valid &= ~LA_CTIME;
3005         if ((valid & LA_MTIME) && (attr->la_mtime == LTIME_S(inode->i_mtime)))
3006                 attr->la_valid &= ~LA_MTIME;
3007
3008         result = osd_quota_transfer(inode, attr);
3009         if (result)
3010                 return;
3011
3012         if (attr->la_valid != 0) {
3013                 result = osd_inode_setattr(info->oti_env, inode, attr);
3014                 /*
3015                  * The osd_inode_setattr() should always succeed here.  The
3016                  * only error that could be returned is EDQUOT when we are
3017                  * trying to change the UID or GID of the inode. However, this
3018                  * should not happen since quota enforcement is no longer
3019                  * enabled on ldiskfs (lquota takes care of it).
3020                  */
3021                 LASSERTF(result == 0, "%d\n", result);
3022                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3023         }
3024
3025         attr->la_valid = valid;
3026 }
3027
3028 /**
3029  * Helper function for osd_create()
3030  *
3031  * \retval 0, on success
3032  */
3033 static int __osd_create(struct osd_thread_info *info, struct osd_object *obj,
3034                         struct lu_attr *attr, struct dt_allocation_hint *hint,
3035                         struct dt_object_format *dof, struct thandle *th)
3036 {
3037         int     result;
3038         __u32   umask;
3039
3040         osd_trans_exec_op(info->oti_env, th, OSD_OT_CREATE);
3041
3042         /* we drop umask so that permissions we pass are not affected */
3043         umask = current->fs->umask;
3044         current->fs->umask = 0;
3045
3046         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
3047                                                   th);
3048         if (likely(obj->oo_inode != NULL)) {
3049                 LASSERT(obj->oo_inode->i_state & I_NEW);
3050
3051                 /* Unlock the inode before attr initialization to avoid
3052                  * unnecessary dqget operations. LU-6378 */
3053                 unlock_new_inode(obj->oo_inode);
3054         }
3055
3056         if (likely(result == 0)) {
3057                 osd_attr_init(info, obj, attr, dof);
3058                 osd_object_init0(obj);
3059         }
3060
3061         /* restore previous umask value */
3062         current->fs->umask = umask;
3063
3064         osd_trans_exec_check(info->oti_env, th, OSD_OT_CREATE);
3065
3066         return result;
3067 }
3068
3069 /**
3070  * Helper function for osd_create()
3071  *
3072  * \retval 0, on success
3073  */
3074 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
3075                            const struct lu_fid *fid, struct thandle *th)
3076 {
3077         struct osd_thread_info *info = osd_oti_get(env);
3078         struct osd_inode_id    *id   = &info->oti_id;
3079         struct osd_device      *osd  = osd_obj2dev(obj);
3080         struct osd_thandle     *oh;
3081         int                     rc;
3082
3083         LASSERT(obj->oo_inode != NULL);
3084
3085         oh = container_of0(th, struct osd_thandle, ot_super);
3086         LASSERT(oh->ot_handle);
3087         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3088
3089         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
3090         rc = osd_oi_insert(info, osd, fid, id, oh->ot_handle,
3091                            OI_CHECK_FLD, NULL);
3092         osd_trans_exec_check(env, th, OSD_OT_INSERT);
3093
3094         return rc;
3095 }
3096
3097 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
3098                    u64 seq, struct lu_seq_range *range)
3099 {
3100         struct seq_server_site  *ss = osd_seq_site(osd);
3101
3102         if (fid_seq_is_idif(seq)) {
3103                 fld_range_set_ost(range);
3104                 range->lsr_index = idif_ost_idx(seq);
3105                 return 0;
3106         }
3107
3108         if (!fid_seq_in_fldb(seq)) {
3109                 fld_range_set_mdt(range);
3110                 if (ss != NULL)
3111                         /* FIXME: If ss is NULL, it suppose not get lsr_index
3112                          * at all */
3113                         range->lsr_index = ss->ss_node_id;
3114                 return 0;
3115         }
3116
3117         LASSERT(ss != NULL);
3118         fld_range_set_any(range);
3119         /* OSD will only do local fld lookup */
3120         return fld_local_lookup(env, ss->ss_server_fld, seq, range);
3121 }
3122
3123 static int osd_declare_create(const struct lu_env *env, struct dt_object *dt,
3124                               struct lu_attr *attr,
3125                               struct dt_allocation_hint *hint,
3126                               struct dt_object_format *dof,
3127                               struct thandle *handle)
3128 {
3129         struct osd_thandle *oh;
3130         int rc;
3131         ENTRY;
3132
3133         LASSERT(handle != NULL);
3134
3135         oh = container_of0(handle, struct osd_thandle, ot_super);
3136         LASSERT(oh->ot_handle == NULL);
3137
3138         /* EA object consumes more credits than regular object: osd_mk_index
3139          * vs. osd_mkreg: osd_mk_index will create 2 blocks for root_node and
3140          * leaf_node, could involves the block, block bitmap, groups, GDT
3141          * change for each block, so add 4 * 2 credits in that case. */
3142         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
3143                              osd_dto_credits_noquota[DTO_OBJECT_CREATE] +
3144                              (dof->dof_type == DFT_INDEX) ? 4 * 2 : 0);
3145         /* Reuse idle OI block may cause additional one OI block
3146          * to be changed. */
3147         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3148                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
3149
3150         if (!attr)
3151                 RETURN(0);
3152
3153         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid,
3154                                    attr->la_projid, 1, oh, osd_dt_obj(dt),
3155                                    NULL, OSD_QID_INODE);
3156         if (rc != 0)
3157                 RETURN(rc);
3158
3159         /* will help to find FID->ino mapping at dt_insert() */
3160         rc = osd_idc_find_and_init(env, osd_obj2dev(osd_dt_obj(dt)),
3161                                    osd_dt_obj(dt));
3162
3163         RETURN(rc);
3164 }
3165
3166 /**
3167  * Called to destroy on-disk representation of the object
3168  *
3169  * Concurrency: must be locked
3170  */
3171 static int osd_declare_destroy(const struct lu_env *env, struct dt_object *dt,
3172                                struct thandle *th)
3173 {
3174         struct osd_object  *obj = osd_dt_obj(dt);
3175         struct inode       *inode = obj->oo_inode;
3176         struct osd_thandle *oh;
3177         int                 rc;
3178         ENTRY;
3179
3180         if (inode == NULL)
3181                 RETURN(-ENOENT);
3182
3183         oh = container_of0(th, struct osd_thandle, ot_super);
3184         LASSERT(oh->ot_handle == NULL);
3185
3186         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
3187                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
3188         /* Recycle idle OI leaf may cause additional three OI blocks
3189          * to be changed. */
3190         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3191                 osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3192                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
3193         /* one less inode */
3194         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3195                                    i_projid_read(inode), -1, oh, obj, NULL,
3196                                    OSD_QID_INODE);
3197         if (rc)
3198                 RETURN(rc);
3199         /* data to be truncated */
3200         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3201                                    i_projid_read(inode), 0, oh, obj, NULL,
3202                                    OSD_QID_BLK);
3203         if (rc)
3204                 RETURN(rc);
3205
3206         /* will help to find FID->ino when this object is being
3207          * added to PENDING/ */
3208         rc = osd_idc_find_and_init(env, osd_obj2dev(obj), obj);
3209
3210         RETURN(rc);
3211 }
3212
3213 static int osd_destroy(const struct lu_env *env, struct dt_object *dt,
3214                        struct thandle *th)
3215 {
3216         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
3217         struct osd_object *obj = osd_dt_obj(dt);
3218         struct inode *inode = obj->oo_inode;
3219         struct osd_device *osd = osd_obj2dev(obj);
3220         struct osd_thandle *oh;
3221         int result;
3222         ENTRY;
3223
3224         oh = container_of0(th, struct osd_thandle, ot_super);
3225         LASSERT(oh->ot_handle);
3226         LASSERT(inode);
3227         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
3228
3229         if (unlikely(fid_is_acct(fid)))
3230                 RETURN(-EPERM);
3231
3232         if (S_ISDIR(inode->i_mode)) {
3233                 LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1 ||
3234                         inode->i_nlink == 2);
3235                 /* it will check/delete the inode from remote parent,
3236                  * how to optimize it? unlink performance impaction XXX */
3237                 result = osd_delete_from_remote_parent(env, osd, obj, oh);
3238                 if (result != 0)
3239                         CERROR("%s: delete inode "DFID": rc = %d\n",
3240                                osd_name(osd), PFID(fid), result);
3241
3242                 spin_lock(&obj->oo_guard);
3243                 clear_nlink(inode);
3244                 spin_unlock(&obj->oo_guard);
3245                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3246         }
3247
3248         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
3249
3250         ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
3251
3252         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3253                 result = osd_oi_delete(osd_oti_get(env), osd, fid,
3254                                        oh->ot_handle, OI_CHECK_FLD);
3255
3256         osd_trans_exec_check(env, th, OSD_OT_DESTROY);
3257         /* XXX: add to ext3 orphan list */
3258         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
3259
3260         /* not needed in the cache anymore */
3261         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
3262         obj->oo_destroyed = 1;
3263
3264         RETURN(0);
3265 }
3266
3267 /**
3268  * Put the fid into lustre_mdt_attrs, and then place the structure
3269  * inode's ea. This fid should not be altered during the life time
3270  * of the inode.
3271  *
3272  * \retval +ve, on success
3273  * \retval -ve, on error
3274  *
3275  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
3276  */
3277 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
3278                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
3279 {
3280         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
3281         struct lustre_mdt_attrs *lma = &loa->loa_lma;
3282         int rc;
3283         ENTRY;
3284
3285         if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
3286                 RETURN(0);
3287
3288         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_OST_EA_FID_SET))
3289                 rc = -ENOMEM;
3290
3291         lustre_loa_init(loa, fid, compat, incompat);
3292         lustre_loa_swab(loa, false);
3293
3294         /* For the OST device with 256 bytes inode size by default,
3295          * the PFID EA will be stored together with LMA EA to avoid
3296          * performance trouble. Otherwise the PFID EA can be stored
3297          * independently. LU-8998 */
3298         if ((compat & LMAC_FID_ON_OST) &&
3299             LDISKFS_INODE_SIZE(inode->i_sb) <= 256)
3300                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
3301                                      sizeof(*loa), XATTR_CREATE);
3302         else
3303                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3304                                      sizeof(*lma), XATTR_CREATE);
3305         /* LMA may already exist, but we need to check that all the
3306          * desired compat/incompat flags have been added. */
3307         if (unlikely(rc == -EEXIST)) {
3308                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
3309                                      XATTR_NAME_LMA, (void *)loa, sizeof(*loa));
3310                 if (rc < 0)
3311                         RETURN(rc);
3312
3313                 if (rc < sizeof(*lma))
3314                         RETURN(-EINVAL);
3315
3316                 lustre_loa_swab(loa, true);
3317                 if (lu_fid_eq(fid, &lma->lma_self_fid) &&
3318                     ((compat == 0 && incompat == 0) ||
3319                      (!(~lma->lma_compat & compat) &&
3320                       !(~lma->lma_incompat & incompat))))
3321                         RETURN(0);
3322
3323                 lma->lma_self_fid = *fid;
3324                 lma->lma_compat |= compat;
3325                 lma->lma_incompat |= incompat;
3326                 if (rc == sizeof(*lma)) {
3327                         lustre_lma_swab(lma);
3328                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3329                                              sizeof(*lma), XATTR_REPLACE);
3330                 } else {
3331                         lustre_loa_swab(loa, false);
3332                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
3333                                              sizeof(*loa), XATTR_REPLACE);
3334                 }
3335         }
3336
3337         RETURN(rc);
3338 }
3339
3340 /**
3341  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
3342  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
3343  * To have compatilibility with 1.8 ldiskfs driver we need to have
3344  * magic number at start of fid data.
3345  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
3346  * its inmemory API.
3347  */
3348 static void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
3349                                          const struct lu_fid *fid)
3350 {
3351         if (!fid_is_namespace_visible(fid) ||
3352             OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
3353                 param->edp_magic = 0;
3354                 return;
3355         }
3356
3357         param->edp_magic = LDISKFS_LUFID_MAGIC;
3358         param->edp_len =  sizeof(struct lu_fid) + 1;
3359         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
3360 }
3361
3362 /**
3363  * Try to read the fid from inode ea into dt_rec.
3364  *
3365  * \param fid object fid.
3366  *
3367  * \retval 0 on success
3368  */
3369 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
3370                           __u32 ino, struct lu_fid *fid,
3371                           struct osd_inode_id *id)
3372 {
3373         struct osd_thread_info *info  = osd_oti_get(env);
3374         struct inode           *inode;
3375         ENTRY;
3376
3377         osd_id_gen(id, ino, OSD_OII_NOGEN);
3378         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
3379         if (IS_ERR(inode))
3380                 RETURN(PTR_ERR(inode));
3381
3382         iput(inode);
3383         RETURN(0);
3384 }
3385
3386 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
3387                                         struct inode *dir,
3388                                         struct inode *parent_dir,
3389                                         const struct lu_fid *dot_fid,
3390                                         const struct lu_fid *dot_dot_fid,
3391                                         struct osd_thandle *oth)
3392 {
3393         struct ldiskfs_dentry_param *dot_ldp;
3394         struct ldiskfs_dentry_param *dot_dot_ldp;
3395         __u32 saved_nlink = dir->i_nlink;
3396         int rc;
3397
3398         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
3399         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
3400
3401         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
3402         dot_ldp->edp_magic = 0;
3403
3404         rc = ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
3405                                     dir, dot_ldp, dot_dot_ldp);
3406         /* The ldiskfs_add_dot_dotdot() may dir->i_nlink as 2, then
3407          * the subseqent ref_add() will increase the dir->i_nlink
3408          * as 3. That is incorrect for new created directory.
3409          *
3410          * It looks like hack, because we want to make the OSD API
3411          * to be order-independent for new created directory object
3412          * between dt_insert(..) and ref_add() operations.
3413          *
3414          * Here, we only restore the in-RAM dir-inode's nlink attr,
3415          * becuase if the nlink attr is not 2, then there will be
3416          * ref_add() called following the dt_insert(..), such call
3417          * will make both the in-RAM and on-disk dir-inode's nlink
3418          * attr to be set as 2. LU-7447 */
3419         set_nlink(dir, saved_nlink);
3420         return rc;
3421 }
3422
3423 /**
3424  * Create an local agent inode for remote entry
3425  */
3426 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
3427                                                   struct osd_device *osd,
3428                                                   struct osd_object *pobj,
3429                                                   const struct lu_fid *fid,
3430                                                   __u32 type,
3431                                                   struct thandle *th)
3432 {
3433         struct osd_thread_info  *info = osd_oti_get(env);
3434         struct inode            *local;
3435         struct osd_thandle      *oh;
3436         int                     rc;
3437         ENTRY;
3438
3439         LASSERT(th);
3440         oh = container_of(th, struct osd_thandle, ot_super);
3441         LASSERT(oh->ot_handle->h_transaction != NULL);
3442
3443         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode, type);
3444         if (IS_ERR(local)) {
3445                 CERROR("%s: create local error %d\n", osd_name(osd),
3446                        (int)PTR_ERR(local));
3447                 RETURN(local);
3448         }
3449
3450         /* restore i_gid in case S_ISGID is set, we will inherit S_ISGID and set
3451          * correct gid on remote file, not agent here */
3452         local->i_gid = current_fsgid();
3453         ldiskfs_set_inode_state(local, LDISKFS_STATE_LUSTRE_NOSCRUB);
3454         unlock_new_inode(local);
3455
3456         /* Agent inode should not have project ID */
3457 #ifdef  HAVE_PROJECT_QUOTA
3458         if (LDISKFS_I(pobj->oo_inode)->i_flags & LUSTRE_PROJINHERIT_FL) {
3459                 rc = __ldiskfs_ioctl_setproject(local, 0);
3460                 if (rc) {
3461                         CERROR("%s: quota transfer failed: rc = %d. Is project "
3462                                "quota enforcement enabled on the ldiskfs "
3463                                "filesystem?\n", local->i_sb->s_id, rc);
3464                         RETURN(ERR_PTR(rc));
3465                 }
3466         }
3467 #endif
3468         /* Set special LMA flag for local agent inode */
3469         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
3470         if (rc != 0) {
3471                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
3472                        osd_name(osd), PFID(fid), rc);
3473                 RETURN(ERR_PTR(rc));
3474         }
3475
3476         if (!S_ISDIR(type))
3477                 RETURN(local);
3478
3479         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
3480                                          lu_object_fid(&pobj->oo_dt.do_lu),
3481                                          fid, oh);
3482         if (rc != 0) {
3483                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
3484                         osd_name(osd), PFID(fid), rc);
3485                 RETURN(ERR_PTR(rc));
3486         }
3487
3488         RETURN(local);
3489 }
3490
3491 /**
3492  * when direntry is deleted, we have to take care of possible agent inode
3493  * referenced by that. unfortunately we can't do this at that point:
3494  * iget() within a running transaction leads to deadlock and we better do
3495  * not call that every delete declaration to save performance. so we put
3496  * a potention agent inode on a list and process that once the transaction
3497  * is over. Notice it's not any worse in terms of real orphans as regular
3498  * object destroy doesn't put inodes on the on-disk orphan list. this should
3499  * be addressed separately
3500  */
3501 static int osd_schedule_agent_inode_removal(const struct lu_env *env,
3502                                             struct osd_thandle *oh,
3503                                             __u32 ino)
3504 {
3505         struct osd_device      *osd = osd_dt_dev(oh->ot_super.th_dev);
3506         struct osd_obj_orphan *oor;
3507
3508         OBD_ALLOC_PTR(oor);
3509         if (oor == NULL)
3510                 return -ENOMEM;
3511
3512         oor->oor_ino = ino;
3513         oor->oor_env = (struct lu_env *)env;
3514         spin_lock(&osd->od_osfs_lock);
3515         list_add(&oor->oor_list, &osd->od_orphan_list);
3516         spin_unlock(&osd->od_osfs_lock);
3517
3518         oh->ot_remove_agents = 1;
3519
3520         return 0;
3521
3522 }
3523
3524 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
3525                                                 struct osd_device *osd)
3526 {
3527         struct osd_thread_info *info = osd_oti_get(env);
3528         struct osd_obj_orphan *oor, *tmp;
3529         struct osd_inode_id id;
3530         struct list_head list;
3531         struct inode *inode;
3532         struct lu_fid fid;
3533         handle_t *jh;
3534         __u32 ino;
3535
3536         INIT_LIST_HEAD(&list);
3537
3538         spin_lock(&osd->od_osfs_lock);
3539         list_for_each_entry_safe(oor, tmp, &osd->od_orphan_list, oor_list) {
3540                 if (oor->oor_env == env) {
3541                         list_del(&oor->oor_list);
3542                         list_add(&oor->oor_list, &list);
3543                 }
3544         }
3545         spin_unlock(&osd->od_osfs_lock);
3546
3547         list_for_each_entry_safe(oor, tmp, &list, oor_list) {
3548
3549                 ino = oor->oor_ino;
3550
3551                 list_del(&oor->oor_list);
3552                 OBD_FREE_PTR(oor);
3553
3554                 osd_id_gen(&id, ino, OSD_OII_NOGEN);
3555                 inode = osd_iget_fid(info, osd, &id, &fid);
3556                 if (IS_ERR(inode))
3557                         continue;
3558
3559                 if (!osd_remote_fid(env, osd, &fid)) {
3560                         iput(inode);
3561                         continue;
3562                 }
3563
3564                 jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC, 1);
3565                 clear_nlink(inode);
3566                 mark_inode_dirty(inode);
3567                 ldiskfs_journal_stop(jh);
3568                 iput(inode);
3569         }
3570
3571         return 0;
3572 }
3573
3574 /**
3575  * OSD layer object create function for OST objects (b=11826).
3576  *
3577  * The FID is inserted into inode xattr here.
3578  *
3579  * \retval   0, on success
3580  * \retval -ve, on error
3581  */
3582 static int osd_create(const struct lu_env *env, struct dt_object *dt,
3583                       struct lu_attr *attr, struct dt_allocation_hint *hint,
3584                       struct dt_object_format *dof, struct thandle *th)
3585 {
3586         const struct lu_fid     *fid    = lu_object_fid(&dt->do_lu);
3587         struct osd_object       *obj    = osd_dt_obj(dt);
3588         struct osd_thread_info  *info   = osd_oti_get(env);
3589         int                      result, on_ost = 0;
3590
3591         ENTRY;
3592
3593         if (dt_object_exists(dt))
3594                 RETURN(-EEXIST);
3595
3596         LINVRNT(osd_invariant(obj));
3597         LASSERT(!dt_object_remote(dt));
3598         LASSERT(osd_is_write_locked(env, obj));
3599         LASSERT(th != NULL);
3600
3601         if (unlikely(fid_is_acct(fid)))
3602                 /* Quota files can't be created from the kernel any more,
3603                  * 'tune2fs -O quota' will take care of creating them */
3604                 RETURN(-EPERM);
3605
3606         result = __osd_create(info, obj, attr, hint, dof, th);
3607         if (result == 0) {
3608                 if (fid_is_idif(fid) &&
3609                     !osd_dev(dt->do_lu.lo_dev)->od_index_in_idif) {
3610                         struct lu_fid *tfid = &info->oti_fid;
3611                         struct ost_id *oi   = &info->oti_ostid;
3612
3613                         fid_to_ostid(fid, oi);
3614                         ostid_to_fid(tfid, oi, 0);
3615                         on_ost = 1;
3616                         result = osd_ea_fid_set(info, obj->oo_inode, tfid,
3617                                                 LMAC_FID_ON_OST, 0);
3618                 } else {
3619                         on_ost = fid_is_on_ost(info, osd_obj2dev(obj),
3620                                                fid, OI_CHECK_FLD);
3621                         result = osd_ea_fid_set(info, obj->oo_inode, fid,
3622                                                 on_ost ? LMAC_FID_ON_OST : 0,
3623                                                 0);
3624                 }
3625                 if (obj->oo_dt.do_body_ops == &osd_body_ops_new)
3626                         obj->oo_dt.do_body_ops = &osd_body_ops;
3627         }
3628
3629         if (result == 0)
3630                 result = __osd_oi_insert(env, obj, fid, th);
3631
3632         /* a small optimization - dt_insert() isn't usually applied
3633          * to OST objects, so we don't need to cache OI mapping for
3634          * OST objects */
3635         if (result == 0 && on_ost == 0) {
3636                 struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
3637                 result = osd_idc_find_and_init(env, osd, obj);
3638                 LASSERT(result == 0);
3639         }
3640
3641         LASSERT(ergo(result == 0,
3642                      dt_object_exists(dt) && !dt_object_remote(dt)));
3643         LINVRNT(osd_invariant(obj));
3644         RETURN(result);
3645 }
3646
3647 static int osd_declare_ref_add(const struct lu_env *env, struct dt_object *dt,
3648                                struct thandle *handle)
3649 {
3650         struct osd_thandle *oh;
3651
3652         /* it's possible that object doesn't exist yet */
3653         LASSERT(handle != NULL);
3654
3655         oh = container_of0(handle, struct osd_thandle, ot_super);
3656         LASSERT(oh->ot_handle == NULL);
3657
3658         osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
3659                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
3660
3661         osd_idc_find_and_init(env, osd_dev(dt->do_lu.lo_dev), osd_dt_obj(dt));
3662
3663         return 0;
3664 }
3665
3666 /*
3667  * Concurrency: @dt is write locked.
3668  */
3669 static int osd_ref_add(const struct lu_env *env, struct dt_object *dt,
3670                        struct thandle *th)
3671 {
3672         struct osd_object  *obj = osd_dt_obj(dt);
3673         struct inode       *inode = obj->oo_inode;
3674         struct osd_thandle *oh;
3675         int                 rc = 0;
3676
3677         if (!dt_object_exists(dt) || obj->oo_destroyed)
3678                 return -ENOENT;
3679
3680         LINVRNT(osd_invariant(obj));
3681         LASSERT(!dt_object_remote(dt));
3682         LASSERT(osd_is_write_locked(env, obj));
3683         LASSERT(th != NULL);
3684
3685         oh = container_of0(th, struct osd_thandle, ot_super);
3686         LASSERT(oh->ot_handle != NULL);
3687
3688         osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
3689
3690         CDEBUG(D_INODE, DFID" increase nlink %d\n",
3691                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
3692         /*
3693          * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
3694          * (65000) subdirectories by storing "1" in i_nlink if the link count
3695          * would otherwise overflow. Directory tranversal tools understand
3696          * that (st_nlink == 1) indicates that the filesystem dose not track
3697          * hard links count on the directory, and will not abort subdirectory
3698          * scanning early once (st_nlink - 2) subdirs have been found.
3699          *
3700          * This also has to properly handle the case of inodes with nlink == 0
3701          * in case they are being linked into the PENDING directory
3702          */
3703         spin_lock(&obj->oo_guard);
3704         if (unlikely(inode->i_nlink == 0))
3705                 /* inc_nlink from 0 may cause WARN_ON */
3706                 set_nlink(inode, 1);
3707         else {
3708                 ldiskfs_inc_count(oh->ot_handle, inode);
3709                 if (!S_ISDIR(inode->i_mode))
3710                         LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
3711         }
3712         spin_unlock(&obj->oo_guard);
3713
3714         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3715         LINVRNT(osd_invariant(obj));
3716
3717         osd_trans_exec_check(env, th, OSD_OT_REF_ADD);
3718
3719         return rc;
3720 }
3721
3722 static int osd_declare_ref_del(const struct lu_env *env, struct dt_object *dt,
3723                                struct thandle *handle)
3724 {
3725         struct osd_thandle *oh;
3726
3727         if (!dt_object_exists(dt))
3728                 return -ENOENT;
3729
3730         LASSERT(!dt_object_remote(dt));
3731         LASSERT(handle != NULL);
3732
3733         oh = container_of0(handle, struct osd_thandle, ot_super);
3734         LASSERT(oh->ot_handle == NULL);
3735
3736         osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
3737                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
3738
3739         return 0;
3740 }
3741
3742 /*
3743  * Concurrency: @dt is write locked.
3744  */
3745 static int osd_ref_del(const struct lu_env *env, struct dt_object *dt,
3746                        struct thandle *th)
3747 {
3748         struct osd_object       *obj = osd_dt_obj(dt);
3749         struct inode            *inode = obj->oo_inode;
3750         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
3751         struct osd_thandle      *oh;
3752
3753         if (!dt_object_exists(dt))
3754                 return -ENOENT;
3755
3756         LINVRNT(osd_invariant(obj));
3757         LASSERT(!dt_object_remote(dt));
3758         LASSERT(osd_is_write_locked(env, obj));
3759         LASSERT(th != NULL);
3760
3761         oh = container_of0(th, struct osd_thandle, ot_super);
3762         LASSERT(oh->ot_handle != NULL);
3763
3764         osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
3765
3766         spin_lock(&obj->oo_guard);
3767         /* That can be result of upgrade from old Lustre version and
3768          * applied only to local files.  Just skip this ref_del call.
3769          * ext4_unlink() only treats this as a warning, don't LASSERT here.*/
3770         if (inode->i_nlink == 0) {
3771                 CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
3772                              D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
3773                              ", maybe an upgraded file? (LU-3915)\n",
3774                              osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
3775                 spin_unlock(&obj->oo_guard);
3776                 return 0;
3777         }
3778
3779         CDEBUG(D_INODE, DFID" decrease nlink %d\n",
3780                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
3781
3782         ldiskfs_dec_count(oh->ot_handle, inode);
3783         spin_unlock(&obj->oo_guard);
3784
3785         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3786         LINVRNT(osd_invariant(obj));
3787
3788         osd_trans_exec_check(env, th, OSD_OT_REF_DEL);
3789
3790         return 0;
3791 }
3792
3793 /*
3794  * Concurrency: @dt is read locked.
3795  */
3796 static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
3797                          struct lu_buf *buf, const char *name)
3798 {
3799         struct osd_object      *obj    = osd_dt_obj(dt);
3800         struct inode           *inode  = obj->oo_inode;
3801         struct osd_thread_info *info   = osd_oti_get(env);
3802         struct dentry          *dentry = &info->oti_obj_dentry;
3803         bool                    cache_xattr = false;
3804         int                     rc;
3805
3806         LASSERT(buf);
3807
3808         /* version get is not real XATTR but uses xattr API */
3809         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
3810                 dt_obj_version_t *ver = buf->lb_buf;
3811
3812                 /* for version we are just using xattr API but change inode
3813                  * field instead */
3814                 if (buf->lb_len == 0)
3815                         return sizeof(dt_obj_version_t);
3816
3817                 if (buf->lb_len < sizeof(dt_obj_version_t))
3818                         return -ERANGE;
3819
3820                 CDEBUG(D_INODE, "Get version %#llx for inode %lu\n",
3821                        LDISKFS_I(inode)->i_fs_version, inode->i_ino);
3822
3823                 *ver = LDISKFS_I(inode)->i_fs_version;
3824
3825                 return sizeof(dt_obj_version_t);
3826         }
3827
3828         if (!dt_object_exists(dt))
3829                 return -ENOENT;
3830
3831         LASSERT(!dt_object_remote(dt));
3832         LASSERT(inode->i_op != NULL);
3833         LASSERT(inode->i_op->getxattr != NULL);
3834
3835         if (strcmp(name, XATTR_NAME_LOV) == 0 ||
3836             strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0)
3837                 cache_xattr = true;
3838
3839         if (cache_xattr) {
3840                 rc = osd_oxc_get(obj, name, buf);
3841                 if (rc != -ENOENT)
3842                         return rc;
3843         }
3844
3845         rc = __osd_xattr_get(inode, dentry, name, buf->lb_buf, buf->lb_len);
3846         if (rc == -ENODATA && strcmp(name, XATTR_NAME_FID) == 0) {
3847                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
3848                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
3849                 struct filter_fid *ff;
3850                 struct ost_layout *ol;
3851
3852                 if (!osd_dev(dt->do_lu.lo_dev)->od_is_ost)
3853                         goto cache;
3854
3855                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
3856                 if (rc)
3857                         return rc;
3858
3859                 if (!(lma->lma_compat & LMAC_STRIPE_INFO)) {
3860                         rc = -ENODATA;
3861                         goto cache;
3862                 }
3863
3864                 rc = sizeof(*ff);
3865                 if (buf->lb_len == 0 || !buf->lb_buf)
3866                         return rc;
3867
3868                 if (buf->lb_len < rc)
3869                         return -ERANGE;
3870
3871                 ff = buf->lb_buf;
3872                 ol = &ff->ff_layout;
3873                 ol->ol_stripe_count = cpu_to_le32(loa->loa_parent_fid.f_ver >>
3874                                                   PFID_STRIPE_IDX_BITS);
3875                 ol->ol_stripe_size = cpu_to_le32(loa->loa_stripe_size);
3876                 loa->loa_parent_fid.f_ver &= PFID_STRIPE_COUNT_MASK;
3877                 fid_cpu_to_le(&ff->ff_parent, &loa->loa_parent_fid);
3878                 if (lma->lma_compat & LMAC_COMP_INFO) {
3879                         ol->ol_comp_start = cpu_to_le64(loa->loa_comp_start);
3880                         ol->ol_comp_end = cpu_to_le64(loa->loa_comp_end);
3881                         ol->ol_comp_id = cpu_to_le32(loa->loa_comp_id);
3882                 } else {
3883                         ol->ol_comp_start = 0;
3884                         ol->ol_comp_end = 0;
3885                         ol->ol_comp_id = 0;
3886                 }
3887         }
3888
3889 cache:
3890         if (cache_xattr) {
3891                 if (rc == -ENOENT || rc == -ENODATA)
3892                         osd_oxc_add(obj, name, NULL, 0);
3893                 else if (rc > 0 && buf->lb_buf != NULL)
3894                         osd_oxc_add(obj, name, buf->lb_buf, rc);
3895         }
3896
3897         return rc;
3898 }
3899
3900 static int osd_declare_xattr_set(const struct lu_env *env,
3901                                  struct dt_object *dt,
3902                                  const struct lu_buf *buf, const char *name,
3903                                  int fl, struct thandle *handle)
3904 {
3905         struct osd_thandle *oh;
3906         int credits = 0;
3907         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
3908
3909         LASSERT(handle != NULL);
3910
3911         oh = container_of0(handle, struct osd_thandle, ot_super);
3912         LASSERT(oh->ot_handle == NULL);
3913
3914         if (strcmp(name, XATTR_NAME_LMA) == 0) {
3915                 /* For non-upgrading case, the LMA is set first and
3916                  * usually fit inode. But for upgrade case, the LMA
3917                  * may be in another separated EA block. */
3918                 if (dt_object_exists(dt)) {
3919                         if (fl == LU_XATTR_REPLACE)
3920                                 credits = 1;
3921                         else
3922                                 goto upgrade;
3923                 }
3924         } else if (strcmp(name, XATTR_NAME_VERSION) == 0) {
3925                 credits = 1;
3926         } else if (strcmp(name, XATTR_NAME_FID) == 0) {
3927                 /* We may need to delete the old PFID EA. */
3928                 credits = LDISKFS_MAXQUOTAS_DEL_BLOCKS(sb);
3929                 if (fl == LU_XATTR_REPLACE)
3930                         credits += 1;
3931                 else
3932                         goto upgrade;
3933         } else {
3934
3935 upgrade:
3936                 credits += osd_dto_credits_noquota[DTO_XATTR_SET];
3937
3938                 if (buf != NULL) {
3939                         ssize_t buflen;
3940
3941                         if (buf->lb_buf == NULL && dt_object_exists(dt)) {
3942                                 /* learn xattr size from osd_xattr_get if
3943                                    attribute has not been read yet */
3944                                 buflen = __osd_xattr_get(
3945                                     osd_dt_obj(dt)->oo_inode,
3946                                     &osd_oti_get(env)->oti_obj_dentry,
3947                                     name, NULL, 0);
3948                                 if (buflen < 0)
3949                                         buflen = 0;
3950                         } else {
3951                                 buflen = buf->lb_len;
3952                         }
3953
3954                         if (buflen > sb->s_blocksize) {
3955                                 credits += osd_calc_bkmap_credits(
3956                                     sb, NULL, 0, -1,
3957                                     (buflen + sb->s_blocksize - 1) >>
3958                                     sb->s_blocksize_bits);
3959                         }
3960                 }
3961                 /*
3962                  * xattr set may involve inode quota change, reserve credits for
3963                  * dquot_initialize()
3964                  */
3965                 credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
3966         }
3967
3968         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET, credits);
3969
3970         return 0;
3971 }
3972
3973 /*
3974  * Concurrency: @dt is write locked.
3975  */
3976 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
3977                          const struct lu_buf *buf, const char *name, int fl,
3978                          struct thandle *handle)
3979 {
3980         struct osd_object *obj = osd_dt_obj(dt);
3981         struct inode *inode = obj->oo_inode;
3982         struct osd_thread_info *info = osd_oti_get(env);
3983         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
3984         struct lustre_mdt_attrs *lma = &loa->loa_lma;
3985         int fs_flags = 0;
3986         int len;
3987         int rc;
3988         ENTRY;
3989
3990         LASSERT(handle);
3991         LASSERT(buf);
3992
3993         /* version set is not real XATTR */
3994         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
3995                 dt_obj_version_t *version = buf->lb_buf;
3996
3997                 /* for version we are just using xattr API but change inode
3998                  * field instead */
3999                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
4000
4001                 CDEBUG(D_INODE, "Set version %#llx (old %#llx) for inode %lu\n",
4002                        *version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
4003
4004                 LDISKFS_I(inode)->i_fs_version = *version;
4005                 /* Version is set after all inode operations are finished,
4006                  * so we should mark it dirty here */
4007                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
4008
4009                 RETURN(0);
4010         }
4011
4012         CDEBUG(D_INODE, DFID" set xattr '%s' with size %zu\n",
4013                PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
4014
4015         len = buf->lb_len;
4016         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
4017         if (fl & LU_XATTR_REPLACE)
4018                 fs_flags |= XATTR_REPLACE;
4019
4020         if (fl & LU_XATTR_CREATE)
4021                 fs_flags |= XATTR_CREATE;
4022
4023         /* For the OST device with 256 bytes inode size by default,
4024          * the PFID EA will be stored together with LMA EA to avoid
4025          * performance trouble. Otherwise the PFID EA can be stored
4026          * independently. LU-8998 */
4027         if (strcmp(name, XATTR_NAME_FID) == 0 &&
4028             LDISKFS_INODE_SIZE(inode->i_sb) <= 256) {
4029                 struct dentry *dentry = &info->oti_obj_dentry;
4030                 struct filter_fid *ff;
4031                 struct ost_layout *ol;
4032                 int fl;
4033
4034                 LASSERT(osd_dev(dt->do_lu.lo_dev)->od_is_ost);
4035
4036                 ff = buf->lb_buf;
4037                 ol = &ff->ff_layout;
4038                 /* Old client does not send stripe information, store
4039                  * the PFID EA on disk directly. */
4040                 if (buf->lb_len == sizeof(struct lu_fid) ||
4041                     ol->ol_stripe_size == 0) {
4042                         len = sizeof(struct lu_fid);
4043                         goto set;
4044                 }
4045
4046                 if (buf->lb_len != sizeof(*ff))
4047                         RETURN(-EINVAL);
4048
4049                 rc = osd_get_lma(info, inode, dentry, loa);
4050                 if (unlikely(rc == -ENODATA)) {
4051                         /* Usually for upgarding from old device */
4052                         lustre_loa_init(loa, lu_object_fid(&dt->do_lu),
4053                                         LMAC_FID_ON_OST, 0);
4054                         fl = XATTR_CREATE;
4055                 } else if (rc) {
4056                         RETURN(rc);
4057                 } else {
4058                         fl = XATTR_REPLACE;
4059                 }
4060
4061                 fid_le_to_cpu(&loa->loa_parent_fid, &ff->ff_parent);
4062                 loa->loa_parent_fid.f_ver |= le32_to_cpu(ol->ol_stripe_count) <<
4063                                              PFID_STRIPE_IDX_BITS;
4064                 loa->loa_stripe_size = le32_to_cpu(ol->ol_stripe_size);
4065                 lma->lma_compat |= LMAC_STRIPE_INFO;
4066                 if (ol->ol_comp_id != 0) {
4067                         loa->loa_comp_id = le32_to_cpu(ol->ol_comp_id);
4068                         loa->loa_comp_start = le64_to_cpu(ol->ol_comp_start);
4069                         loa->loa_comp_end = le64_to_cpu(ol->ol_comp_end);
4070                         lma->lma_compat |= LMAC_COMP_INFO;
4071                 }
4072
4073                 lustre_loa_swab(loa, false);
4074
4075                 /* Remove old PFID EA entry firstly. */
4076                 ll_vfs_dq_init(inode);
4077                 rc = inode->i_op->removexattr(dentry, name);
4078                 if (rc && rc != -ENODATA)
4079                         RETURN(rc);
4080
4081                 /* Store the PFID EA inside the LMA EA. */
4082                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
4083                                      sizeof(*loa), fl);
4084
4085                 RETURN(rc);
4086         } else if (strcmp(name, XATTR_NAME_LMV) == 0) {
4087                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
4088                 if (rc)
4089                         RETURN(rc);
4090
4091                 lma->lma_incompat |= LMAI_STRIPED;
4092                 lustre_lma_swab(lma);
4093                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4094                                      sizeof(*lma), XATTR_REPLACE);
4095                 if (rc != 0)
4096                         RETURN(rc);
4097         }
4098
4099 set:
4100         rc = __osd_xattr_set(info, inode, name, buf->lb_buf, len, fs_flags);
4101         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
4102
4103         if (rc == 0 &&
4104             (strcmp(name, XATTR_NAME_LOV) == 0 ||
4105              strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
4106                 osd_oxc_add(obj, name, buf->lb_buf, buf->lb_len);
4107
4108         return rc;
4109 }
4110
4111 /*
4112  * Concurrency: @dt is read locked.
4113  */
4114 static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
4115                           const struct lu_buf *buf)
4116 {
4117         struct osd_object      *obj    = osd_dt_obj(dt);
4118         struct inode           *inode  = obj->oo_inode;
4119         struct osd_thread_info *info   = osd_oti_get(env);
4120         struct dentry          *dentry = &info->oti_obj_dentry;
4121
4122         if (!dt_object_exists(dt))
4123                 return -ENOENT;
4124
4125         LASSERT(!dt_object_remote(dt));
4126         LASSERT(inode->i_op != NULL);
4127         LASSERT(inode->i_op->listxattr != NULL);
4128
4129         dentry->d_inode = inode;
4130         dentry->d_sb = inode->i_sb;
4131         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
4132 }
4133
4134 static int osd_declare_xattr_del(const struct lu_env *env,
4135                                  struct dt_object *dt, const char *name,
4136                                  struct thandle *handle)
4137 {
4138         struct osd_thandle *oh;
4139         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
4140
4141         LASSERT(!dt_object_remote(dt));
4142         LASSERT(handle != NULL);
4143
4144         oh = container_of0(handle, struct osd_thandle, ot_super);
4145         LASSERT(oh->ot_handle == NULL);
4146
4147         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
4148                              osd_dto_credits_noquota[DTO_XATTR_SET]);
4149         /*
4150          * xattr del may involve inode quota change, reserve credits for
4151          * dquot_initialize()
4152          */
4153         oh->ot_credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
4154
4155         return 0;
4156 }
4157
4158 /*
4159  * Concurrency: @dt is write locked.
4160  */
4161 static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
4162                          const char *name, struct thandle *handle)
4163 {
4164         struct osd_object      *obj    = osd_dt_obj(dt);
4165         struct inode           *inode  = obj->oo_inode;
4166         struct osd_thread_info *info   = osd_oti_get(env);
4167         struct dentry          *dentry = &info->oti_obj_dentry;
4168         int                     rc;
4169
4170         if (!dt_object_exists(dt))
4171                 return -ENOENT;
4172
4173         LASSERT(!dt_object_remote(dt));
4174         LASSERT(inode->i_op != NULL);
4175         LASSERT(inode->i_op->removexattr != NULL);
4176         LASSERT(handle != NULL);
4177
4178         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
4179
4180         ll_vfs_dq_init(inode);
4181         dentry->d_inode = inode;
4182         dentry->d_sb = inode->i_sb;
4183         rc = inode->i_op->removexattr(dentry, name);
4184         if (rc == -ENODATA && strcmp(name, XATTR_NAME_FID) == 0) {
4185                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
4186
4187                 LASSERT(osd_dev(dt->do_lu.lo_dev)->od_is_ost);
4188
4189                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
4190                                  &info->oti_ost_attrs);
4191                 if (!rc) {
4192                         if (!(lma->lma_compat & LMAC_STRIPE_INFO)) {
4193                                 rc = -ENODATA;
4194                                 goto out;
4195                         }
4196
4197                         lma->lma_compat &= ~(LMAC_STRIPE_INFO | LMAC_COMP_INFO);
4198                         lustre_lma_swab(lma);
4199                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4200                                              sizeof(*lma), XATTR_REPLACE);
4201                 }
4202         }
4203
4204 out:
4205         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
4206
4207         if (rc == 0 &&
4208             (strcmp(name, XATTR_NAME_LOV) == 0 ||
4209              strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
4210                 osd_oxc_del(obj, name);
4211
4212         return rc;
4213 }
4214
4215 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt,
4216                            __u64 start, __u64 end)
4217 {
4218         struct osd_object       *obj    = osd_dt_obj(dt);
4219         struct inode            *inode  = obj->oo_inode;
4220         struct osd_thread_info  *info   = osd_oti_get(env);
4221         struct dentry           *dentry = &info->oti_obj_dentry;
4222         struct file             *file   = &info->oti_file;
4223         int                     rc;
4224
4225         ENTRY;
4226
4227         dentry->d_inode = inode;
4228         dentry->d_sb = inode->i_sb;
4229         file->f_path.dentry = dentry;
4230         file->f_mapping = inode->i_mapping;
4231         file->f_op = inode->i_fop;
4232         set_file_inode(file, inode);
4233
4234         rc = ll_vfs_fsync_range(file, start, end, 0);
4235
4236         RETURN(rc);
4237 }
4238
4239 static int osd_invalidate(const struct lu_env *env, struct dt_object *dt)
4240 {
4241         return 0;
4242 }
4243
4244 /*
4245  * Index operations.
4246  */
4247
4248 static int osd_iam_index_probe(const struct lu_env *env, struct osd_object *o,
4249                            const struct dt_index_features *feat)
4250 {
4251         struct iam_descr *descr;
4252
4253         if (osd_object_is_root(o))
4254                 return feat == &dt_directory_features;
4255
4256         LASSERT(o->oo_dir != NULL);
4257
4258         descr = o->oo_dir->od_container.ic_descr;
4259         if (feat == &dt_directory_features) {
4260                 if (descr->id_rec_size == sizeof(struct osd_fid_pack))
4261                         return 1;
4262                 else
4263                         return 0;
4264         } else {
4265                 return
4266                         feat->dif_keysize_min <= descr->id_key_size &&
4267                         descr->id_key_size <= feat->dif_keysize_max &&
4268                         feat->dif_recsize_min <= descr->id_rec_size &&
4269                         descr->id_rec_size <= feat->dif_recsize_max &&
4270                         !(feat->dif_flags & (DT_IND_VARKEY |
4271                                              DT_IND_VARREC | DT_IND_NONUNQ)) &&
4272                         ergo(feat->dif_flags & DT_IND_UPDATE,
4273                              1 /* XXX check that object (and file system) is
4274                                 * writable */);
4275         }
4276 }
4277
4278 static int osd_iam_container_init(const struct lu_env *env,
4279                                   struct osd_object *obj,
4280                                   struct osd_directory *dir)
4281 {
4282         struct iam_container *bag = &dir->od_container;
4283         int result;
4284
4285         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
4286         if (result != 0)
4287                 return result;
4288
4289         result = iam_container_setup(bag);
4290         if (result == 0)
4291                 obj->oo_dt.do_index_ops = &osd_index_iam_ops;
4292         else
4293                 iam_container_fini(bag);
4294
4295         return result;
4296 }
4297
4298
4299 /*
4300  * Concurrency: no external locking is necessary.
4301  */
4302 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
4303                          const struct dt_index_features *feat)
4304 {
4305         int                      result;
4306         int                      skip_iam = 0;
4307         struct osd_object       *obj = osd_dt_obj(dt);
4308
4309         LINVRNT(osd_invariant(obj));
4310
4311         if (osd_object_is_root(obj)) {
4312                 dt->do_index_ops = &osd_index_ea_ops;
4313                 result = 0;
4314         } else if (feat == &dt_directory_features) {
4315                 dt->do_index_ops = &osd_index_ea_ops;
4316                 if (obj->oo_inode == NULL || S_ISDIR(obj->oo_inode->i_mode))
4317                         result = 0;
4318                 else
4319                         result = -ENOTDIR;
4320                 skip_iam = 1;
4321         } else if (unlikely(feat == &dt_otable_features)) {
4322                 dt->do_index_ops = &osd_otable_ops;
4323                 return 0;
4324         } else if (unlikely(feat == &dt_acct_features)) {
4325                 dt->do_index_ops = &osd_acct_index_ops;
4326                 result = 0;
4327                 skip_iam = 1;
4328         } else if (!osd_has_index(obj)) {
4329                 struct osd_directory *dir;
4330
4331                 OBD_ALLOC_PTR(dir);
4332                 if (dir != NULL) {
4333
4334                         spin_lock(&obj->oo_guard);
4335                         if (obj->oo_dir == NULL)
4336                                 obj->oo_dir = dir;
4337                         else
4338                                 /*
4339                                  * Concurrent thread allocated container data.
4340                                  */
4341                                 OBD_FREE_PTR(dir);
4342                         spin_unlock(&obj->oo_guard);
4343                         /*
4344                          * Now, that we have container data, serialize its
4345                          * initialization.
4346                          */
4347                         down_write(&obj->oo_ext_idx_sem);
4348                         /*
4349                          * recheck under lock.
4350                          */
4351                         if (!osd_has_index(obj))
4352                                 result = osd_iam_container_init(env, obj,
4353                                                                 obj->oo_dir);
4354                         else
4355                                 result = 0;
4356                         up_write(&obj->oo_ext_idx_sem);
4357                 } else {
4358                         result = -ENOMEM;
4359                 }
4360         } else {
4361                 result = 0;
4362         }
4363
4364         if (result == 0 && skip_iam == 0) {
4365                 if (!osd_iam_index_probe(env, obj, feat))
4366                         result = -ENOTDIR;
4367         }
4368         LINVRNT(osd_invariant(obj));
4369
4370         return result;
4371 }
4372
4373 static int osd_otable_it_attr_get(const struct lu_env *env,
4374                                  struct dt_object *dt,
4375                                  struct lu_attr *attr)
4376 {
4377         attr->la_valid = 0;
4378         return 0;
4379 }
4380
4381 static const struct dt_object_operations osd_obj_ops = {
4382         .do_read_lock           = osd_read_lock,
4383         .do_write_lock          = osd_write_lock,
4384         .do_read_unlock         = osd_read_unlock,
4385         .do_write_unlock        = osd_write_unlock,
4386         .do_write_locked        = osd_write_locked,
4387         .do_attr_get            = osd_attr_get,
4388         .do_declare_attr_set    = osd_declare_attr_set,
4389         .do_attr_set            = osd_attr_set,
4390         .do_ah_init             = osd_ah_init,
4391         .do_declare_create      = osd_declare_create,
4392         .do_create              = osd_create,
4393         .do_declare_destroy     = osd_declare_destroy,
4394         .do_destroy             = osd_destroy,
4395         .do_index_try           = osd_index_try,
4396         .do_declare_ref_add     = osd_declare_ref_add,
4397         .do_ref_add             = osd_ref_add,
4398         .do_declare_ref_del     = osd_declare_ref_del,
4399         .do_ref_del             = osd_ref_del,
4400         .do_xattr_get           = osd_xattr_get,
4401         .do_declare_xattr_set   = osd_declare_xattr_set,
4402         .do_xattr_set           = osd_xattr_set,
4403         .do_declare_xattr_del   = osd_declare_xattr_del,
4404         .do_xattr_del           = osd_xattr_del,
4405         .do_xattr_list          = osd_xattr_list,
4406         .do_object_sync         = osd_object_sync,
4407         .do_invalidate          = osd_invalidate,
4408 };
4409
4410 static const struct dt_object_operations osd_obj_otable_it_ops = {
4411         .do_attr_get    = osd_otable_it_attr_get,
4412         .do_index_try   = osd_index_try,
4413 };
4414
4415 static int osd_index_declare_iam_delete(const struct lu_env *env,
4416                                         struct dt_object *dt,
4417                                         const struct dt_key *key,
4418                                         struct thandle *handle)
4419 {
4420         struct osd_thandle    *oh;
4421
4422         oh = container_of0(handle, struct osd_thandle, ot_super);
4423         LASSERT(oh->ot_handle == NULL);
4424
4425         /* Recycle  may cause additional three blocks to be changed. */
4426         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
4427                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
4428
4429         return 0;
4430 }
4431
4432 /**
4433  *      delete a (key, value) pair from index \a dt specified by \a key
4434  *
4435  *      \param  dt      osd index object
4436  *      \param  key     key for index
4437  *      \param  rec     record reference
4438  *      \param  handle  transaction handler
4439  *
4440  *      \retval  0  success
4441  *      \retval -ve   failure
4442  */
4443 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
4444                                 const struct dt_key *key,
4445                                 struct thandle *handle)
4446 {
4447         struct osd_thread_info *oti = osd_oti_get(env);
4448         struct osd_object      *obj = osd_dt_obj(dt);
4449         struct osd_thandle     *oh;
4450         struct iam_path_descr  *ipd;
4451         struct iam_container   *bag = &obj->oo_dir->od_container;
4452         int                     rc;
4453         ENTRY;
4454
4455         if (!dt_object_exists(dt))
4456                 RETURN(-ENOENT);
4457
4458         LINVRNT(osd_invariant(obj));
4459         LASSERT(!dt_object_remote(dt));
4460         LASSERT(bag->ic_object == obj->oo_inode);
4461         LASSERT(handle != NULL);
4462
4463         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
4464
4465         ipd = osd_idx_ipd_get(env, bag);
4466         if (unlikely(ipd == NULL))
4467                 RETURN(-ENOMEM);
4468
4469         oh = container_of0(handle, struct osd_thandle, ot_super);
4470         LASSERT(oh->ot_handle != NULL);
4471         LASSERT(oh->ot_handle->h_transaction != NULL);
4472
4473         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
4474                 /* swab quota uid/gid provided by caller */
4475                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
4476                 key = (const struct dt_key *)&oti->oti_quota_id;
4477         }
4478
4479         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
4480         osd_ipd_put(env, bag, ipd);
4481         LINVRNT(osd_invariant(obj));
4482         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
4483         RETURN(rc);
4484 }
4485
4486 static int osd_index_declare_ea_delete(const struct lu_env *env,
4487                                        struct dt_object *dt,
4488                                        const struct dt_key *key,
4489                                        struct thandle *handle)
4490 {
4491         struct osd_thandle *oh;
4492         struct inode       *inode;
4493         int                 rc, credits;
4494         ENTRY;
4495
4496         LASSERT(!dt_object_remote(dt));
4497         LASSERT(handle != NULL);
4498
4499         oh = container_of0(handle, struct osd_thandle, ot_super);
4500         LASSERT(oh->ot_handle == NULL);
4501
4502         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE];
4503         if (key != NULL && unlikely(strcmp((char *)key, dotdot) == 0)) {
4504                 /* '..' to a remote object has a local representative */
4505                 credits += osd_dto_credits_noquota[DTO_INDEX_DELETE];
4506                 /* to reset LMAI_REMOTE_PARENT */
4507                 credits += 1;
4508         }
4509         osd_trans_declare_op(env, oh, OSD_OT_DELETE, credits);
4510
4511         inode = osd_dt_obj(dt)->oo_inode;
4512         if (inode == NULL)
4513                 RETURN(-ENOENT);
4514
4515         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
4516                                    i_projid_read(inode), 0, oh, osd_dt_obj(dt),
4517                                    NULL, OSD_QID_BLK);
4518         RETURN(rc);
4519 }
4520
4521 static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
4522                                           struct dt_rec *fid)
4523 {
4524         struct osd_fid_pack *rec;
4525         int                  rc = -ENODATA;
4526
4527         if (de->file_type & LDISKFS_DIRENT_LUFID) {
4528                 rec = (struct osd_fid_pack *) (de->name + de->name_len + 1);
4529                 rc = osd_fid_unpack((struct lu_fid *)fid, rec);
4530                 if (rc == 0 && unlikely(!fid_is_sane((struct lu_fid *)fid)))
4531                         rc = -EINVAL;
4532         }
4533         return rc;
4534 }
4535
4536 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
4537                           const struct lu_fid *fid)
4538 {
4539         struct seq_server_site  *ss = osd_seq_site(osd);
4540         ENTRY;
4541
4542         /* FID seqs not in FLDB, must be local seq */
4543         if (unlikely(!fid_seq_in_fldb(fid_seq(fid))))
4544                 RETURN(0);
4545
4546         /* If FLD is not being initialized yet, it only happens during the
4547          * initialization, likely during mgs initialization, and we assume
4548          * this is local FID. */
4549         if (ss == NULL || ss->ss_server_fld == NULL)
4550                 RETURN(0);
4551
4552         /* Only check the local FLDB here */
4553         if (osd_seq_exists(env, osd, fid_seq(fid)))
4554                 RETURN(0);
4555
4556         RETURN(1);
4557 }
4558
4559 static void osd_take_care_of_agent(const struct lu_env *env,
4560                                    struct osd_device *osd,
4561                                    struct osd_thandle *oh,
4562                                    struct ldiskfs_dir_entry_2 *de)
4563 {
4564         struct lu_fid *fid = &osd_oti_get(env)->oti_fid;
4565         struct osd_idmap_cache *idc;
4566         int rc, schedule = 0;
4567
4568         LASSERT(de != NULL);
4569
4570         rc = osd_get_fid_from_dentry(de, (struct dt_rec *)fid);
4571         if (likely(rc == 0)) {
4572                 idc = osd_idc_find_or_init(env, osd, fid);
4573                 if (IS_ERR(idc) || idc->oic_remote)
4574                         schedule = 1;
4575         } else if (rc == -ENODATA) {
4576                 /* can't get FID, postpone to the end of the
4577                  * transaction when iget() is safe */
4578                 schedule = 1;
4579         } else {
4580                 CERROR("%s: can't get FID: rc = %d\n", osd_name(osd), rc);
4581         }
4582         if (schedule)
4583                 osd_schedule_agent_inode_removal(env, oh,
4584                                                  le32_to_cpu(de->inode));
4585 }
4586
4587 /**
4588  * Index delete function for interoperability mode (b11826).
4589  * It will remove the directory entry added by osd_index_ea_insert().
4590  * This entry is needed to maintain name->fid mapping.
4591  *
4592  * \param key,  key i.e. file entry to be deleted
4593  *
4594  * \retval   0, on success
4595  * \retval -ve, on error
4596  */
4597 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
4598                                const struct dt_key *key, struct thandle *handle)
4599 {
4600         struct osd_object          *obj = osd_dt_obj(dt);
4601         struct inode               *dir = obj->oo_inode;
4602         struct dentry              *dentry;
4603         struct osd_thandle         *oh;
4604         struct ldiskfs_dir_entry_2 *de = NULL;
4605         struct buffer_head         *bh;
4606         struct htree_lock          *hlock = NULL;
4607         struct lu_fid              *fid = &osd_oti_get(env)->oti_fid;
4608         struct osd_device          *osd = osd_dev(dt->do_lu.lo_dev);
4609         int                        rc;
4610         ENTRY;
4611
4612         if (!dt_object_exists(dt))
4613                 RETURN(-ENOENT);
4614
4615         LINVRNT(osd_invariant(obj));
4616         LASSERT(!dt_object_remote(dt));
4617         LASSERT(handle != NULL);
4618
4619         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
4620
4621         oh = container_of(handle, struct osd_thandle, ot_super);
4622         LASSERT(oh->ot_handle != NULL);
4623         LASSERT(oh->ot_handle->h_transaction != NULL);
4624
4625         ll_vfs_dq_init(dir);
4626         dentry = osd_child_dentry_get(env, obj,
4627                                       (char *)key, strlen((char *)key));
4628
4629         if (obj->oo_hl_head != NULL) {
4630                 hlock = osd_oti_get(env)->oti_hlock;
4631                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
4632                                    dir, LDISKFS_HLOCK_DEL);
4633         } else {
4634                 down_write(&obj->oo_ext_idx_sem);
4635         }
4636
4637         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
4638         if (!IS_ERR(bh)) {
4639                 /* If this is not the ".." entry, it might be a remote DNE
4640                  * entry and  we need to check if the FID is for a remote
4641                  * MDT.  If the FID is  not in the directory entry (e.g.
4642                  * upgraded 1.8 filesystem without dirdata enabled) then
4643                  * we need to get the FID from the LMA. For a remote directory
4644                  * there HAS to be an LMA, it cannot be an IGIF inode in this
4645                  * case.
4646                  *
4647                  * Delete the entry before the agent inode in order to
4648                  * simplify error handling.  At worst an error after deleting
4649                  * the entry first might leak the agent inode afterward. The
4650                  * reverse would need filesystem abort in case of error deleting
4651                  * the entry after the agent had been removed, or leave a
4652                  * dangling entry pointing at a random inode. */
4653                 if (strcmp((char *)key, dotdot) != 0)
4654                         osd_take_care_of_agent(env, osd, oh, de);
4655                 rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
4656                 brelse(bh);
4657         } else {
4658                 rc = PTR_ERR(bh);
4659         }
4660         if (hlock != NULL)
4661                 ldiskfs_htree_unlock(hlock);
4662         else
4663                 up_write(&obj->oo_ext_idx_sem);
4664
4665         if (rc != 0)
4666                 GOTO(out, rc);
4667
4668         /* For inode on the remote MDT, .. will point to
4669          * /Agent directory, Check whether it needs to delete
4670          * from agent directory */
4671         if (unlikely(strcmp((char *)key, dotdot) == 0)) {
4672                 int ret;
4673
4674                 ret = osd_delete_from_remote_parent(env, osd_obj2dev(obj),
4675                                                     obj, oh);
4676                 if (ret != 0)
4677                         /* Sigh, the entry has been deleted, and
4678                          * it is not easy to revert it back, so
4679                          * let's keep this error private, and let
4680                          * LFSCK fix it. XXX */
4681                         CERROR("%s: delete remote parent "DFID": rc = %d\n",
4682                                osd_name(osd), PFID(fid), ret);
4683         }
4684 out:
4685         LASSERT(osd_invariant(obj));
4686         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
4687         RETURN(rc);
4688 }
4689
4690 /**
4691  *      Lookup index for \a key and copy record to \a rec.
4692  *
4693  *      \param  dt      osd index object
4694  *      \param  key     key for index
4695  *      \param  rec     record reference
4696  *
4697  *      \retval  +ve  success : exact mach
4698  *      \retval  0    return record with key not greater than \a key
4699  *      \retval -ve   failure
4700  */
4701 static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
4702                                 struct dt_rec *rec, const struct dt_key *key)
4703 {
4704         struct osd_object      *obj = osd_dt_obj(dt);
4705         struct iam_path_descr  *ipd;
4706         struct iam_container   *bag = &obj->oo_dir->od_container;
4707         struct osd_thread_info *oti = osd_oti_get(env);
4708         struct iam_iterator    *it = &oti->oti_idx_it;
4709         struct iam_rec         *iam_rec;
4710         int                     rc;
4711         ENTRY;
4712
4713         if (!dt_object_exists(dt))
4714                 RETURN(-ENOENT);
4715
4716         LASSERT(osd_invariant(obj));
4717         LASSERT(!dt_object_remote(dt));
4718         LASSERT(bag->ic_object == obj->oo_inode);
4719
4720         ipd = osd_idx_ipd_get(env, bag);
4721         if (IS_ERR(ipd))
4722                 RETURN(-ENOMEM);
4723
4724         /* got ipd now we can start iterator. */
4725         iam_it_init(it, bag, 0, ipd);
4726
4727         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
4728                 /* swab quota uid/gid provided by caller */
4729                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
4730                 key = (const struct dt_key *)&oti->oti_quota_id;
4731         }
4732
4733         rc = iam_it_get(it, (struct iam_key *)key);
4734         if (rc >= 0) {
4735                 if (S_ISDIR(obj->oo_inode->i_mode))
4736                         iam_rec = (struct iam_rec *)oti->oti_ldp;
4737                 else
4738                         iam_rec = (struct iam_rec *) rec;
4739
4740                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)iam_rec);
4741
4742                 if (S_ISDIR(obj->oo_inode->i_mode))
4743                         osd_fid_unpack((struct lu_fid *) rec,
4744                                        (struct osd_fid_pack *)iam_rec);
4745                 else if (fid_is_quota(lu_object_fid(&dt->do_lu)))
4746                         osd_quota_unpack(obj, rec);
4747         }
4748
4749         iam_it_put(it);
4750         iam_it_fini(it);
4751         osd_ipd_put(env, bag, ipd);
4752
4753         LINVRNT(osd_invariant(obj));
4754
4755         RETURN(rc);
4756 }
4757
4758 static int osd_index_declare_iam_insert(const struct lu_env *env,
4759                                         struct dt_object *dt,
4760                                         const struct dt_rec *rec,
4761                                         const struct dt_key *key,
4762                                         struct thandle *handle)
4763 {
4764         struct osd_thandle *oh;
4765
4766         LASSERT(handle != NULL);
4767
4768         oh = container_of0(handle, struct osd_thandle, ot_super);
4769         LASSERT(oh->ot_handle == NULL);
4770
4771         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
4772                              osd_dto_credits_noquota[DTO_INDEX_INSERT]);
4773
4774         return 0;
4775 }
4776
4777 /**
4778  *      Inserts (key, value) pair in \a dt index object.
4779  *
4780  *      \param  dt      osd index object
4781  *      \param  key     key for index
4782  *      \param  rec     record reference
4783  *      \param  th      transaction handler
4784  *
4785  *      \retval  0  success
4786  *      \retval -ve failure
4787  */
4788 static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
4789                                 const struct dt_rec *rec,
4790                                 const struct dt_key *key, struct thandle *th,
4791                                 int ignore_quota)
4792 {
4793         struct osd_object     *obj = osd_dt_obj(dt);
4794         struct iam_path_descr *ipd;
4795         struct osd_thandle    *oh;
4796         struct iam_container  *bag;
4797         struct osd_thread_info *oti = osd_oti_get(env);
4798         struct iam_rec         *iam_rec;
4799         int                     rc;
4800         ENTRY;
4801
4802         if (!dt_object_exists(dt))
4803                 RETURN(-ENOENT);
4804
4805         LINVRNT(osd_invariant(obj));
4806         LASSERT(!dt_object_remote(dt));
4807
4808         bag = &obj->oo_dir->od_container;
4809         LASSERT(bag->ic_object == obj->oo_inode);
4810         LASSERT(th != NULL);
4811
4812         osd_trans_exec_op(env, th, OSD_OT_INSERT);
4813
4814         ipd = osd_idx_ipd_get(env, bag);
4815         if (unlikely(ipd == NULL))
4816                 RETURN(-ENOMEM);
4817
4818         oh = container_of0(th, struct osd_thandle, ot_super);
4819         LASSERT(oh->ot_handle != NULL);
4820         LASSERT(oh->ot_handle->h_transaction != NULL);
4821         if (S_ISDIR(obj->oo_inode->i_mode)) {
4822                 iam_rec = (struct iam_rec *)oti->oti_ldp;
4823                 osd_fid_pack((struct osd_fid_pack *)iam_rec, rec, &oti->oti_fid);
4824         } else if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
4825                 /* pack quota uid/gid */
4826                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
4827                 key = (const struct dt_key *)&oti->oti_quota_id;
4828                 /* pack quota record */
4829                 rec = osd_quota_pack(obj, rec, &oti->oti_quota_rec);
4830                 iam_rec = (struct iam_rec *)rec;
4831         } else {
4832                 iam_rec = (struct iam_rec *)rec;
4833         }
4834
4835         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
4836                         iam_rec, ipd);
4837         osd_ipd_put(env, bag, ipd);
4838         LINVRNT(osd_invariant(obj));
4839         osd_trans_exec_check(env, th, OSD_OT_INSERT);
4840         RETURN(rc);
4841 }
4842
4843 /**
4844  * Calls ldiskfs_add_entry() to add directory entry
4845  * into the directory. This is required for
4846  * interoperability mode (b11826)
4847  *
4848  * \retval   0, on success
4849  * \retval -ve, on error
4850  */
4851 static int __osd_ea_add_rec(struct osd_thread_info *info,
4852                             struct osd_object *pobj, struct inode  *cinode,
4853                             const char *name, const struct lu_fid *fid,
4854                             struct htree_lock *hlock, struct thandle *th)
4855 {
4856         struct ldiskfs_dentry_param *ldp;
4857         struct dentry               *child;
4858         struct osd_thandle          *oth;
4859         int                          rc;
4860
4861         oth = container_of(th, struct osd_thandle, ot_super);
4862         LASSERT(oth->ot_handle != NULL);
4863         LASSERT(oth->ot_handle->h_transaction != NULL);
4864         LASSERT(pobj->oo_inode);
4865
4866         ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
4867         if (unlikely(pobj->oo_inode ==
4868                      osd_sb(osd_obj2dev(pobj))->s_root->d_inode))
4869                 ldp->edp_magic = 0;
4870         else
4871                 osd_get_ldiskfs_dirent_param(ldp, fid);
4872         child = osd_child_dentry_get(info->oti_env, pobj, name, strlen(name));
4873         child->d_fsdata = (void *)ldp;
4874         ll_vfs_dq_init(pobj->oo_inode);
4875         rc = osd_ldiskfs_add_entry(info, osd_obj2dev(pobj), oth->ot_handle,
4876                                    child, cinode, hlock);
4877         if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_TYPE)) {
4878                 struct ldiskfs_dir_entry_2      *de;
4879                 struct buffer_head              *bh;
4880                 int                              rc1;
4881
4882                 bh = osd_ldiskfs_find_entry(pobj->oo_inode, &child->d_name, &de,
4883                                             NULL, hlock);
4884                 if (!IS_ERR(bh)) {
4885                         rc1 = ldiskfs_journal_get_write_access(oth->ot_handle,
4886                                                                bh);
4887                         if (rc1 == 0) {
4888                                 if (S_ISDIR(cinode->i_mode))
4889                                         de->file_type = LDISKFS_DIRENT_LUFID |
4890                                                         LDISKFS_FT_REG_FILE;
4891                                 else
4892                                         de->file_type = LDISKFS_DIRENT_LUFID |
4893                                                         LDISKFS_FT_DIR;
4894                                 ldiskfs_handle_dirty_metadata(oth->ot_handle,
4895                                                               NULL, bh);
4896                         }
4897                         brelse(bh);
4898                 }
4899         }
4900
4901         RETURN(rc);
4902 }
4903
4904 /**
4905  * Calls ldiskfs_add_dot_dotdot() to add dot and dotdot entries
4906  * into the directory.Also sets flags into osd object to
4907  * indicate dot and dotdot are created. This is required for
4908  * interoperability mode (b11826)
4909  *
4910  * \param dir   directory for dot and dotdot fixup.
4911  * \param obj   child object for linking
4912  *
4913  * \retval   0, on success
4914  * \retval -ve, on error
4915  */
4916 static int osd_add_dot_dotdot(struct osd_thread_info *info,
4917                               struct osd_object *dir,
4918                               struct inode *parent_dir, const char *name,
4919                               const struct lu_fid *dot_fid,
4920                               const struct lu_fid *dot_dot_fid,
4921                               struct thandle *th)
4922 {
4923         struct inode                *inode = dir->oo_inode;
4924         struct osd_thandle          *oth;
4925         int result = 0;
4926
4927         oth = container_of(th, struct osd_thandle, ot_super);
4928         LASSERT(oth->ot_handle->h_transaction != NULL);
4929         LASSERT(S_ISDIR(dir->oo_inode->i_mode));
4930
4931         if (strcmp(name, dot) == 0) {
4932                 if (dir->oo_compat_dot_created) {
4933                         result = -EEXIST;
4934                 } else {
4935                         LASSERT(inode->i_ino == parent_dir->i_ino);
4936                         dir->oo_compat_dot_created = 1;
4937                         result = 0;
4938                 }
4939         } else if (strcmp(name, dotdot) == 0) {
4940                 if (!dir->oo_compat_dot_created)
4941                         return -EINVAL;
4942                 /* in case of rename, dotdot is already created */
4943                 if (dir->oo_compat_dotdot_created) {
4944                         return __osd_ea_add_rec(info, dir, parent_dir, name,
4945                                                 dot_dot_fid, NULL, th);
4946                 }
4947
4948                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PARENT)) {
4949                         struct lu_fid tfid = *dot_dot_fid;
4950
4951                         tfid.f_oid--;
4952                         result = osd_add_dot_dotdot_internal(info,
4953                                         dir->oo_inode, parent_dir, dot_fid,
4954                                         &tfid, oth);
4955                 } else {
4956                         result = osd_add_dot_dotdot_internal(info,
4957                                         dir->oo_inode, parent_dir, dot_fid,
4958                                         dot_dot_fid, oth);
4959                 }
4960
4961                 if (result == 0)
4962                         dir->oo_compat_dotdot_created = 1;
4963         }
4964
4965         return result;
4966 }
4967
4968
4969 /**
4970  * It will call the appropriate osd_add* function and return the
4971  * value, return by respective functions.
4972  */
4973 static int osd_ea_add_rec(const struct lu_env *env, struct osd_object *pobj,
4974                           struct inode *cinode, const char *name,
4975                           const struct lu_fid *fid, struct thandle *th)
4976 {
4977         struct osd_thread_info *info   = osd_oti_get(env);
4978         struct htree_lock      *hlock;
4979         int                     rc;
4980
4981         hlock = pobj->oo_hl_head != NULL ? info->oti_hlock : NULL;
4982
4983         if (name[0] == '.' && (name[1] == '\0' || (name[1] == '.' &&
4984                                                    name[2] =='\0'))) {
4985                 if (hlock != NULL) {
4986                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
4987                                            pobj->oo_inode, 0);
4988                 } else {
4989                         down_write(&pobj->oo_ext_idx_sem);
4990                 }
4991
4992                 rc = osd_add_dot_dotdot(info, pobj, cinode, name,
4993                                         lu_object_fid(&pobj->oo_dt.do_lu),
4994                                         fid, th);
4995         } else {
4996                 if (hlock != NULL) {
4997                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
4998                                            pobj->oo_inode, LDISKFS_HLOCK_ADD);
4999                 } else {
5000                         down_write(&pobj->oo_ext_idx_sem);
5001                 }
5002
5003                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_INDIR)) {
5004                         struct lu_fid *tfid = &info->oti_fid;
5005
5006                         *tfid = *fid;
5007                         tfid->f_ver = ~0;
5008                         rc = __osd_ea_add_rec(info, pobj, cinode, name,
5009                                               tfid, hlock, th);
5010                 } else {
5011                         rc = __osd_ea_add_rec(info, pobj, cinode, name, fid,
5012                                               hlock, th);
5013                 }
5014         }
5015         if (hlock != NULL)
5016                 ldiskfs_htree_unlock(hlock);
5017         else
5018                 up_write(&pobj->oo_ext_idx_sem);
5019
5020         return rc;
5021 }
5022
5023 static int
5024 osd_consistency_check(struct osd_thread_info *oti, struct osd_device *dev,
5025                       struct osd_idmap_cache *oic)
5026 {
5027         struct osd_scrub *scrub = &dev->od_scrub;
5028         struct lu_fid *fid = &oic->oic_fid;
5029         struct osd_inode_id *id = &oic->oic_lid;
5030         struct inode *inode = NULL;
5031         int once  = 0;
5032         bool insert;
5033         int rc;
5034         ENTRY;
5035
5036         if (!fid_is_norm(fid) && !fid_is_igif(fid))
5037                 RETURN(0);
5038
5039         if (scrub->os_pos_current > id->oii_ino)
5040                 RETURN(0);
5041
5042 again:
5043         rc = osd_oi_lookup(oti, dev, fid, &oti->oti_id, 0);
5044         if (rc == -ENOENT) {
5045                 __u32 gen = id->oii_gen;
5046
5047                 insert = true;
5048                 if (inode != NULL)
5049                         goto trigger;
5050
5051                 inode = osd_iget(oti, dev, id);
5052                 /* The inode has been removed (by race maybe). */
5053                 if (IS_ERR(inode)) {
5054                         rc = PTR_ERR(inode);
5055
5056                         RETURN(rc == -ESTALE ? -ENOENT : rc);
5057                 }
5058
5059                 /* The OI mapping is lost. */
5060                 if (gen != OSD_OII_NOGEN)
5061                         goto trigger;
5062
5063                 /* The inode may has been reused by others, we do not know,
5064                  * leave it to be handled by subsequent osd_fid_lookup(). */
5065                 GOTO(out, rc = 0);
5066         } else if (rc || osd_id_eq(id, &oti->oti_id)) {
5067                 GOTO(out, rc);
5068         }
5069
5070         insert = false;
5071
5072 trigger:
5073         if (thread_is_running(&scrub->os_thread)) {
5074                 if (inode == NULL) {
5075                         inode = osd_iget(oti, dev, id);
5076                         /* The inode has been removed (by race maybe). */
5077                         if (IS_ERR(inode)) {
5078                                 rc = PTR_ERR(inode);
5079
5080                                 RETURN(rc == -ESTALE ? -ENOENT : rc);
5081                         }
5082                 }
5083
5084                 rc = osd_oii_insert(dev, oic, insert);
5085                 /* There is race condition between osd_oi_lookup and OI scrub.
5086                  * The OI scrub finished just after osd_oi_lookup() failure.
5087                  * Under such case, it is unnecessary to trigger OI scrub again,
5088                  * but try to call osd_oi_lookup() again. */
5089                 if (unlikely(rc == -EAGAIN))
5090                         goto again;
5091
5092                 if (!S_ISDIR(inode->i_mode))
5093                         rc = 0;
5094                 else
5095                         rc = osd_check_lmv(oti, dev, inode, oic);
5096
5097                 GOTO(out, rc);
5098         }
5099
5100         if (!dev->od_noscrub && ++once == 1) {
5101                 rc = osd_scrub_start(dev, SS_AUTO_PARTIAL | SS_CLEAR_DRYRUN |
5102                                      SS_CLEAR_FAILOUT);
5103                 CDEBUG(D_LFSCK | D_CONSOLE | D_WARNING,
5104                        "%s: trigger partial OI scrub for RPC inconsistency "
5105                        "checking FID "DFID": rc = %d\n",
5106                        osd_dev2name(dev), PFID(fid), rc);
5107                 if (rc == 0 || rc == -EALREADY)
5108                         goto again;
5109         }
5110
5111         GOTO(out, rc);
5112
5113 out:
5114         if (inode)
5115                 iput(inode);
5116
5117         RETURN(rc);
5118 }
5119
5120 static int osd_fail_fid_lookup(struct osd_thread_info *oti,
5121                                struct osd_device *dev,
5122                                struct osd_idmap_cache *oic,
5123                                struct lu_fid *fid, __u32 ino)
5124 {
5125         struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
5126         struct inode *inode;
5127         int rc;
5128
5129         osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
5130         inode = osd_iget(oti, dev, &oic->oic_lid);
5131         if (IS_ERR(inode)) {
5132                 fid_zero(&oic->oic_fid);
5133                 return PTR_ERR(inode);
5134         }
5135
5136         rc = osd_get_lma(oti, inode, &oti->oti_obj_dentry, loa);
5137         iput(inode);
5138         if (rc != 0)
5139                 fid_zero(&oic->oic_fid);
5140         else
5141                 *fid = oic->oic_fid = loa->loa_lma.lma_self_fid;
5142         return rc;
5143 }
5144
5145 void osd_add_oi_cache(struct osd_thread_info *info, struct osd_device *osd,
5146                       struct osd_inode_id *id, const struct lu_fid *fid)
5147 {
5148         CDEBUG(D_INODE, "add "DFID" %u:%u to info %p\n", PFID(fid),
5149                id->oii_ino, id->oii_gen, info);
5150         info->oti_cache.oic_lid = *id;
5151         info->oti_cache.oic_fid = *fid;
5152         info->oti_cache.oic_dev = osd;
5153 }
5154
5155 /**
5156  * Get parent FID from the linkEA.
5157  *
5158  * For a directory which parent resides on remote MDT, to satisfy the
5159  * local e2fsck, we insert it into the /REMOTE_PARENT_DIR locally. On
5160  * the other hand, to make the lookup(..) on the directory can return
5161  * the real parent FID, we append the real parent FID after its ".."
5162  * name entry in the /REMOTE_PARENT_DIR.
5163  *
5164  * Unfortunately, such PFID-in-dirent cannot be preserved via file-level
5165  * backup. So after the restore, we cannot get the right parent FID from
5166  * its ".." name entry in the /REMOTE_PARENT_DIR. Under such case, since
5167  * we have stored the real parent FID in the directory object's linkEA,
5168  * we can parse the linkEA for the real parent FID.
5169  *
5170  * \param[in] env       pointer to the thread context
5171  * \param[in] obj       pointer to the object to be handled
5172  * \param[out]fid       pointer to the buffer to hold the parent FID
5173  *
5174  * \retval              0 for getting the real parent FID successfully
5175  * \retval              negative error number on failure
5176  */
5177 static int osd_get_pfid_from_linkea(const struct lu_env *env,
5178                                     struct osd_object *obj,
5179                                     struct lu_fid *fid)
5180 {
5181         struct osd_thread_info  *oti    = osd_oti_get(env);
5182         struct lu_buf           *buf    = &oti->oti_big_buf;
5183         struct dentry           *dentry = &oti->oti_obj_dentry;
5184         struct inode            *inode  = obj->oo_inode;
5185         struct linkea_data       ldata  = { NULL };
5186         int                      rc;
5187         ENTRY;
5188
5189         fid_zero(fid);
5190         if (!S_ISDIR(inode->i_mode))
5191                 RETURN(-EIO);
5192
5193 again:
5194         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
5195                              buf->lb_buf, buf->lb_len);
5196         if (rc == -ERANGE) {
5197                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
5198                                      NULL, 0);
5199                 if (rc > 0) {
5200                         lu_buf_realloc(buf, rc);
5201                         if (buf->lb_buf == NULL)
5202                                 RETURN(-ENOMEM);
5203
5204                         goto again;
5205                 }
5206         }
5207
5208         if (unlikely(rc == 0))
5209                 RETURN(-ENODATA);
5210
5211         if (rc < 0)
5212                 RETURN(rc);
5213
5214         if (unlikely(buf->lb_buf == NULL)) {
5215                 lu_buf_realloc(buf, rc);
5216                 if (buf->lb_buf == NULL)
5217                         RETURN(-ENOMEM);
5218
5219                 goto again;
5220         }
5221
5222         ldata.ld_buf = buf;
5223         rc = linkea_init_with_rec(&ldata);
5224         if (!rc) {
5225                 linkea_first_entry(&ldata);
5226                 linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, NULL, fid);
5227         }
5228
5229         RETURN(rc);
5230 }
5231
5232 static int osd_verify_ent_by_linkea(const struct lu_env *env,
5233                                     struct inode *inode,
5234                                     const struct lu_fid *pfid,
5235                                     const char *name, const int namelen)
5236 {
5237         struct osd_thread_info *oti = osd_oti_get(env);
5238         struct lu_buf *buf = &oti->oti_big_buf;
5239         struct dentry *dentry = &oti->oti_obj_dentry;
5240         struct linkea_data ldata = { NULL };
5241         struct lu_name cname = { .ln_name = name,
5242                                  .ln_namelen = namelen };
5243         int rc;
5244         ENTRY;
5245
5246 again:
5247         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
5248                              buf->lb_buf, buf->lb_len);
5249         if (rc == -ERANGE)
5250                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK, NULL, 0);
5251
5252         if (rc < 0)
5253                 RETURN(rc);
5254
5255         if (unlikely(rc == 0))
5256                 RETURN(-ENODATA);
5257
5258         if (buf->lb_len < rc) {
5259                 lu_buf_realloc(buf, rc);
5260                 if (buf->lb_buf == NULL)
5261                         RETURN(-ENOMEM);
5262
5263                 goto again;
5264         }
5265
5266         ldata.ld_buf = buf;
5267         rc = linkea_init_with_rec(&ldata);
5268         if (!rc)
5269                 rc = linkea_links_find(&ldata, &cname, pfid);
5270
5271         RETURN(rc);
5272 }
5273
5274 /**
5275  * Calls ->lookup() to find dentry. From dentry get inode and
5276  * read inode's ea to get fid. This is required for  interoperability
5277  * mode (b11826)
5278  *
5279  * \retval   0, on success
5280  * \retval -ve, on error
5281  */
5282 static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
5283                              struct dt_rec *rec, const struct dt_key *key)
5284 {
5285         struct inode                    *dir    = obj->oo_inode;
5286         struct dentry                   *dentry;
5287         struct ldiskfs_dir_entry_2      *de;
5288         struct buffer_head              *bh;
5289         struct lu_fid                   *fid = (struct lu_fid *) rec;
5290         struct htree_lock               *hlock = NULL;
5291         int                             ino;
5292         int                             rc;
5293         ENTRY;
5294
5295         LASSERT(dir->i_op != NULL);
5296         LASSERT(dir->i_op->lookup != NULL);
5297
5298         dentry = osd_child_dentry_get(env, obj,
5299                                       (char *)key, strlen((char *)key));
5300
5301         if (obj->oo_hl_head != NULL) {
5302                 hlock = osd_oti_get(env)->oti_hlock;
5303                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
5304                                    dir, LDISKFS_HLOCK_LOOKUP);
5305         } else {
5306                 down_read(&obj->oo_ext_idx_sem);
5307         }
5308
5309         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
5310         if (!IS_ERR(bh)) {
5311                 struct osd_thread_info *oti = osd_oti_get(env);
5312                 struct osd_inode_id *id = &oti->oti_id;
5313                 struct osd_idmap_cache *oic = &oti->oti_cache;
5314                 struct osd_device *dev = osd_obj2dev(obj);
5315
5316                 ino = le32_to_cpu(de->inode);
5317                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP)) {
5318                         brelse(bh);
5319                         rc = osd_fail_fid_lookup(oti, dev, oic, fid, ino);
5320                         GOTO(out, rc);
5321                 }
5322
5323                 rc = osd_get_fid_from_dentry(de, rec);
5324
5325                 /* done with de, release bh */
5326                 brelse(bh);
5327                 if (rc != 0) {
5328                         if (unlikely(ino == osd_remote_parent_ino(dev))) {
5329                                 const char *name = (const char *)key;
5330
5331                                 /* If the parent is on remote MDT, and there
5332                                  * is no FID-in-dirent, then we have to get
5333                                  * the parent FID from the linkEA.  */
5334                                 if (likely(strlen(name) == 2 &&
5335                                            name[0] == '.' && name[1] == '.'))
5336                                         rc = osd_get_pfid_from_linkea(env, obj,
5337                                                                       fid);
5338                         } else {
5339                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
5340                         }
5341                 } else {
5342                         osd_id_gen(id, ino, OSD_OII_NOGEN);
5343                 }
5344
5345                 if (rc != 0 || osd_remote_fid(env, dev, fid)) {
5346                         fid_zero(&oic->oic_fid);
5347
5348                         GOTO(out, rc);
5349                 }
5350
5351                 osd_add_oi_cache(osd_oti_get(env), osd_obj2dev(obj), id, fid);
5352                 rc = osd_consistency_check(oti, dev, oic);
5353                 if (rc != 0)
5354                         fid_zero(&oic->oic_fid);
5355         } else {
5356                 rc = PTR_ERR(bh);
5357         }
5358
5359         GOTO(out, rc);
5360
5361 out:
5362         if (hlock != NULL)
5363                 ldiskfs_htree_unlock(hlock);
5364         else
5365                 up_read(&obj->oo_ext_idx_sem);
5366         return rc;
5367 }
5368
5369 static int osd_index_declare_ea_insert(const struct lu_env *env,
5370                                        struct dt_object *dt,
5371                                        const struct dt_rec *rec,
5372                                        const struct dt_key *key,
5373                                        struct thandle *handle)
5374 {
5375         struct osd_thandle      *oh;
5376         struct osd_device       *osd   = osd_dev(dt->do_lu.lo_dev);
5377         struct dt_insert_rec    *rec1   = (struct dt_insert_rec *)rec;
5378         const struct lu_fid     *fid    = rec1->rec_fid;
5379         int                      credits, rc = 0;
5380         struct osd_idmap_cache  *idc;
5381         ENTRY;
5382
5383         LASSERT(!dt_object_remote(dt));
5384         LASSERT(handle != NULL);
5385         LASSERT(fid != NULL);
5386         LASSERT(rec1->rec_type != 0);
5387
5388         oh = container_of0(handle, struct osd_thandle, ot_super);
5389         LASSERT(oh->ot_handle == NULL);
5390
5391         credits = osd_dto_credits_noquota[DTO_INDEX_INSERT];
5392
5393         /* we can't call iget() while a transactions is running
5394          * (this can lead to a deadlock), but we need to know
5395          * inum and object type. so we find this information at
5396          * declaration and cache in per-thread info */
5397         idc = osd_idc_find_or_init(env, osd, fid);
5398         if (IS_ERR(idc))
5399                 RETURN(PTR_ERR(idc));
5400         if (idc->oic_remote) {
5401                 /* a reference to remote inode is represented by an
5402                  * agent inode which we have to create */
5403                 credits += osd_dto_credits_noquota[DTO_OBJECT_CREATE];
5404                 credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
5405         }
5406
5407         osd_trans_declare_op(env, oh, OSD_OT_INSERT, credits);
5408
5409         if (osd_dt_obj(dt)->oo_inode != NULL) {
5410                 struct inode *inode = osd_dt_obj(dt)->oo_inode;
5411
5412                 /* We ignore block quota on meta pool (MDTs), so needn't
5413                  * calculate how many blocks will be consumed by this index
5414                  * insert */
5415                 rc = osd_declare_inode_qid(env, i_uid_read(inode),
5416                                            i_gid_read(inode),
5417                                            i_projid_read(inode), 0,
5418                                            oh, osd_dt_obj(dt), NULL,
5419                                            OSD_QID_BLK);
5420         }
5421
5422         RETURN(rc);
5423 }
5424
5425 /**
5426  * Index add function for interoperability mode (b11826).
5427  * It will add the directory entry.This entry is needed to
5428  * maintain name->fid mapping.
5429  *
5430  * \param key it is key i.e. file entry to be inserted
5431  * \param rec it is value of given key i.e. fid
5432  *
5433  * \retval   0, on success
5434  * \retval -ve, on error
5435  */
5436 static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
5437                                const struct dt_rec *rec,
5438                                const struct dt_key *key, struct thandle *th,
5439                                int ignore_quota)
5440 {
5441         struct osd_object       *obj = osd_dt_obj(dt);
5442         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
5443         struct dt_insert_rec    *rec1   = (struct dt_insert_rec *)rec;
5444         const struct lu_fid     *fid    = rec1->rec_fid;
5445         const char              *name = (const char *)key;
5446         struct osd_thread_info  *oti   = osd_oti_get(env);
5447         struct inode            *child_inode = NULL;
5448         struct osd_idmap_cache  *idc;
5449         int                     rc;
5450         ENTRY;
5451
5452         if (!dt_object_exists(dt))
5453                 RETURN(-ENOENT);
5454
5455         LASSERT(osd_invariant(obj));
5456         LASSERT(!dt_object_remote(dt));
5457         LASSERT(th != NULL);
5458
5459         osd_trans_exec_op(env, th, OSD_OT_INSERT);
5460
5461         LASSERTF(fid_is_sane(fid), "fid"DFID" is insane!\n", PFID(fid));
5462
5463         idc = osd_idc_find(env, osd, fid);
5464         if (unlikely(idc == NULL)) {
5465                 /* this dt_insert() wasn't declared properly, so
5466                  * FID is missing in OI cache. we better do not
5467                  * lookup FID in FLDB/OI and don't risk to deadlock,
5468                  * but in some special cases (lfsck testing, etc)
5469                  * it's much simpler than fixing a caller */
5470                 CERROR("%s: "DFID" wasn't declared for insert\n",
5471                        osd_name(osd), PFID(fid));
5472                 dump_stack();
5473                 idc = osd_idc_find_or_init(env, osd, fid);
5474                 if (IS_ERR(idc))
5475                         RETURN(PTR_ERR(idc));
5476         }
5477
5478         if (idc->oic_remote) {
5479                 /* Insert remote entry */
5480                 if (strcmp(name, dotdot) == 0 && strlen(name) == 2) {
5481                         struct osd_mdobj_map    *omm = osd->od_mdt_map;
5482                         struct osd_thandle      *oh;
5483
5484                         /* If parent on remote MDT, we need put this object
5485                          * under AGENT */
5486                         oh = container_of(th, typeof(*oh), ot_super);
5487                         rc = osd_add_to_remote_parent(env, osd, obj, oh);
5488                         if (rc != 0) {
5489                                 CERROR("%s: add "DFID" error: rc = %d\n",
5490                                        osd_name(osd),
5491                                        PFID(lu_object_fid(&dt->do_lu)), rc);
5492                                 RETURN(rc);
5493                         }
5494
5495                         child_inode = igrab(omm->omm_remote_parent->d_inode);
5496                 } else {
5497                         child_inode = osd_create_local_agent_inode(env, osd,
5498                                         obj, fid, rec1->rec_type & S_IFMT, th);
5499                         if (IS_ERR(child_inode))
5500                                 RETURN(PTR_ERR(child_inode));
5501                 }
5502         } else {
5503                 /* Insert local entry */
5504                 if (unlikely(idc->oic_lid.oii_ino == 0)) {
5505                         /* for a reason OI cache wasn't filled properly */
5506                         CERROR("%s: OIC for "DFID" isn't filled\n",
5507                                osd_name(osd), PFID(fid));
5508                         RETURN(-EINVAL);
5509                 }
5510                 child_inode = oti->oti_inode;
5511                 if (unlikely(child_inode == NULL)) {
5512                         struct ldiskfs_inode_info *lii;
5513                         OBD_ALLOC_PTR(lii);
5514                         if (lii == NULL)
5515                                 RETURN(-ENOMEM);
5516                         child_inode = oti->oti_inode = &lii->vfs_inode;
5517                 }
5518                 child_inode->i_sb = osd_sb(osd);
5519                 child_inode->i_ino = idc->oic_lid.oii_ino;
5520                 child_inode->i_mode = rec1->rec_type & S_IFMT;
5521         }
5522
5523         rc = osd_ea_add_rec(env, obj, child_inode, name, fid, th);
5524
5525         CDEBUG(D_INODE, "parent %lu insert %s:%lu rc = %d\n",
5526                obj->oo_inode->i_ino, name, child_inode->i_ino, rc);
5527
5528         if (child_inode && child_inode != oti->oti_inode)
5529                 iput(child_inode);
5530         LASSERT(osd_invariant(obj));
5531         osd_trans_exec_check(env, th, OSD_OT_INSERT);
5532         RETURN(rc);
5533 }
5534
5535 /**
5536  *  Initialize osd Iterator for given osd index object.
5537  *
5538  *  \param  dt      osd index object
5539  */
5540
5541 static struct dt_it *osd_it_iam_init(const struct lu_env *env,
5542                                      struct dt_object *dt,
5543                                      __u32 unused)
5544 {
5545         struct osd_it_iam      *it;
5546         struct osd_object      *obj = osd_dt_obj(dt);
5547         struct lu_object       *lo  = &dt->do_lu;
5548         struct iam_path_descr  *ipd;
5549         struct iam_container   *bag = &obj->oo_dir->od_container;
5550
5551         if (!dt_object_exists(dt))
5552                 return ERR_PTR(-ENOENT);
5553
5554         OBD_ALLOC_PTR(it);
5555         if (it == NULL)
5556                 return ERR_PTR(-ENOMEM);
5557
5558         ipd = osd_it_ipd_get(env, bag);
5559         if (likely(ipd != NULL)) {
5560                 it->oi_obj = obj;
5561                 it->oi_ipd = ipd;
5562                 lu_object_get(lo);
5563                 iam_it_init(&it->oi_it, bag, IAM_IT_MOVE, ipd);
5564                 return (struct dt_it *)it;
5565         } else {
5566                 OBD_FREE_PTR(it);
5567                 return ERR_PTR(-ENOMEM);
5568         }
5569 }
5570
5571 /**
5572  * free given Iterator.
5573  */
5574 static void osd_it_iam_fini(const struct lu_env *env, struct dt_it *di)
5575 {
5576         struct osd_it_iam       *it  = (struct osd_it_iam *)di;
5577         struct osd_object       *obj = it->oi_obj;
5578
5579         iam_it_fini(&it->oi_it);
5580         osd_ipd_put(env, &obj->oo_dir->od_container, it->oi_ipd);
5581         osd_object_put(env, obj);
5582         OBD_FREE_PTR(it);
5583 }
5584
5585 /**
5586  *  Move Iterator to record specified by \a key
5587  *
5588  *  \param  di      osd iterator
5589  *  \param  key     key for index
5590  *
5591  *  \retval +ve  di points to record with least key not larger than key
5592  *  \retval  0   di points to exact matched key
5593  *  \retval -ve  failure
5594  */
5595
5596 static int osd_it_iam_get(const struct lu_env *env,
5597                           struct dt_it *di, const struct dt_key *key)
5598 {
5599         struct osd_thread_info  *oti = osd_oti_get(env);
5600         struct osd_it_iam       *it = (struct osd_it_iam *)di;
5601
5602         if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
5603                 /* swab quota uid/gid */
5604                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
5605                 key = (struct dt_key *)&oti->oti_quota_id;
5606         }
5607
5608         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
5609 }
5610
5611 /**
5612  *  Release Iterator
5613  *
5614  *  \param  di      osd iterator
5615  */
5616 static void osd_it_iam_put(const struct lu_env *env, struct dt_it *di)
5617 {
5618         struct osd_it_iam *it = (struct osd_it_iam *)di;
5619
5620         iam_it_put(&it->oi_it);
5621 }
5622
5623 /**
5624  *  Move iterator by one record
5625  *
5626  *  \param  di      osd iterator
5627  *
5628  *  \retval +1   end of container reached
5629  *  \retval  0   success
5630  *  \retval -ve  failure
5631  */
5632
5633 static int osd_it_iam_next(const struct lu_env *env, struct dt_it *di)
5634 {
5635         struct osd_it_iam *it = (struct osd_it_iam *)di;
5636
5637         return iam_it_next(&it->oi_it);
5638 }
5639
5640 /**
5641  * Return pointer to the key under iterator.
5642  */
5643
5644 static struct dt_key *osd_it_iam_key(const struct lu_env *env,
5645                                  const struct dt_it *di)
5646 {
5647         struct osd_thread_info *oti = osd_oti_get(env);
5648         struct osd_it_iam      *it = (struct osd_it_iam *)di;
5649         struct osd_object      *obj = it->oi_obj;
5650         struct dt_key          *key;
5651
5652         key = (struct dt_key *)iam_it_key_get(&it->oi_it);
5653
5654         if (!IS_ERR(key) && fid_is_quota(lu_object_fid(&obj->oo_dt.do_lu))) {
5655                 /* swab quota uid/gid */
5656                 oti->oti_quota_id = le64_to_cpu(*((__u64 *)key));
5657                 key = (struct dt_key *)&oti->oti_quota_id;
5658         }
5659
5660         return key;
5661 }
5662
5663 /**
5664  * Return size of key under iterator (in bytes)
5665  */
5666
5667 static int osd_it_iam_key_size(const struct lu_env *env, const struct dt_it *di)
5668 {
5669         struct osd_it_iam *it = (struct osd_it_iam *)di;
5670
5671         return iam_it_key_size(&it->oi_it);
5672 }
5673
5674 static inline void
5675 osd_it_append_attrs(struct lu_dirent *ent, int len, __u16 type)
5676 {
5677         /* check if file type is required */
5678         if (ent->lde_attrs & LUDA_TYPE) {
5679                 struct luda_type *lt;
5680                 int align = sizeof(*lt) - 1;
5681
5682                 len = (len + align) & ~align;
5683                 lt = (struct luda_type *)(ent->lde_name + len);
5684                 lt->lt_type = cpu_to_le16(DTTOIF(type));
5685         }
5686
5687         ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
5688 }
5689
5690 /**
5691  * build lu direct from backend fs dirent.
5692  */
5693
5694 static inline void
5695 osd_it_pack_dirent(struct lu_dirent *ent, struct lu_fid *fid, __u64 offset,
5696                    char *name, __u16 namelen, __u16 type, __u32 attr)
5697 {
5698         ent->lde_attrs = attr | LUDA_FID;
5699         fid_cpu_to_le(&ent->lde_fid, fid);
5700
5701         ent->lde_hash = cpu_to_le64(offset);
5702         ent->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
5703
5704         strncpy(ent->lde_name, name, namelen);
5705         ent->lde_name[namelen] = '\0';
5706         ent->lde_namelen = cpu_to_le16(namelen);
5707
5708         /* append lustre attributes */
5709         osd_it_append_attrs(ent, namelen, type);
5710 }
5711
5712 /**
5713  * Return pointer to the record under iterator.
5714  */
5715 static int osd_it_iam_rec(const struct lu_env *env,
5716                           const struct dt_it *di,
5717                           struct dt_rec *dtrec, __u32 attr)
5718 {
5719         struct osd_it_iam      *it   = (struct osd_it_iam *)di;
5720         struct osd_thread_info *info = osd_oti_get(env);
5721         ENTRY;
5722
5723         if (S_ISDIR(it->oi_obj->oo_inode->i_mode)) {
5724                 const struct osd_fid_pack *rec;
5725                 struct lu_fid             *fid = &info->oti_fid;
5726                 struct lu_dirent          *lde = (struct lu_dirent *)dtrec;
5727                 char                      *name;
5728                 int                        namelen;
5729                 __u64                      hash;
5730                 int                        rc;
5731
5732                 name = (char *)iam_it_key_get(&it->oi_it);
5733                 if (IS_ERR(name))
5734                         RETURN(PTR_ERR(name));
5735
5736                 namelen = iam_it_key_size(&it->oi_it);
5737
5738                 rec = (const struct osd_fid_pack *)iam_it_rec_get(&it->oi_it);
5739                 if (IS_ERR(rec))
5740                         RETURN(PTR_ERR(rec));
5741
5742                 rc = osd_fid_unpack(fid, rec);
5743                 if (rc)
5744                         RETURN(rc);
5745
5746                 hash = iam_it_store(&it->oi_it);
5747
5748                 /* IAM does not store object type in IAM index (dir) */
5749                 osd_it_pack_dirent(lde, fid, hash, name, namelen,
5750                                    0, LUDA_FID);
5751         } else if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
5752                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
5753                            (struct iam_rec *)dtrec);
5754                 osd_quota_unpack(it->oi_obj, dtrec);
5755         } else {
5756                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
5757                            (struct iam_rec *)dtrec);
5758         }
5759
5760         RETURN(0);
5761 }
5762
5763 /**
5764  * Returns cookie for current Iterator position.
5765  */
5766 static __u64 osd_it_iam_store(const struct lu_env *env, const struct dt_it *di)
5767 {
5768         struct osd_it_iam *it = (struct osd_it_iam *)di;
5769
5770         return iam_it_store(&it->oi_it);
5771 }
5772
5773 /**
5774  * Restore iterator from cookie.
5775  *
5776  * \param  di      osd iterator
5777  * \param  hash    Iterator location cookie
5778  *
5779  * \retval +ve  di points to record with least key not larger than key.
5780  * \retval  0   di points to exact matched key
5781  * \retval -ve  failure
5782  */
5783
5784 static int osd_it_iam_load(const struct lu_env *env,
5785                            const struct dt_it *di, __u64 hash)
5786 {
5787         struct osd_it_iam *it = (struct osd_it_iam *)di;
5788
5789         return iam_it_load(&it->oi_it, hash);
5790 }
5791
5792 static const struct dt_index_operations osd_index_iam_ops = {
5793         .dio_lookup         = osd_index_iam_lookup,
5794         .dio_declare_insert = osd_index_declare_iam_insert,
5795         .dio_insert         = osd_index_iam_insert,
5796         .dio_declare_delete = osd_index_declare_iam_delete,
5797         .dio_delete         = osd_index_iam_delete,
5798         .dio_it     = {
5799                 .init     = osd_it_iam_init,
5800                 .fini     = osd_it_iam_fini,
5801                 .get      = osd_it_iam_get,
5802                 .put      = osd_it_iam_put,
5803                 .next     = osd_it_iam_next,
5804                 .key      = osd_it_iam_key,
5805                 .key_size = osd_it_iam_key_size,
5806                 .rec      = osd_it_iam_rec,
5807                 .store    = osd_it_iam_store,
5808                 .load     = osd_it_iam_load
5809         }
5810 };
5811
5812
5813 /**
5814  * Creates or initializes iterator context.
5815  *
5816  * \retval struct osd_it_ea, iterator structure on success
5817  *
5818  */
5819 static struct dt_it *osd_it_ea_init(const struct lu_env *env,
5820                                     struct dt_object *dt,
5821                                     __u32 attr)
5822 {
5823         struct osd_object       *obj  = osd_dt_obj(dt);
5824         struct osd_thread_info  *info = osd_oti_get(env);
5825         struct osd_it_ea        *oie;
5826         struct file             *file;
5827         struct lu_object        *lo   = &dt->do_lu;
5828         struct dentry           *obj_dentry;
5829         ENTRY;
5830
5831         if (!dt_object_exists(dt) || obj->oo_destroyed)
5832                 RETURN(ERR_PTR(-ENOENT));
5833
5834         OBD_SLAB_ALLOC_PTR_GFP(oie, osd_itea_cachep, GFP_NOFS);
5835         if (oie == NULL)
5836                 RETURN(ERR_PTR(-ENOMEM));
5837         obj_dentry = &oie->oie_dentry;
5838
5839         obj_dentry->d_inode = obj->oo_inode;
5840         obj_dentry->d_sb = osd_sb(osd_obj2dev(obj));
5841         obj_dentry->d_name.hash = 0;
5842
5843         oie->oie_rd_dirent       = 0;
5844         oie->oie_it_dirent       = 0;
5845         oie->oie_dirent          = NULL;
5846         if (unlikely(!info->oti_it_ea_buf_used)) {
5847                 oie->oie_buf = info->oti_it_ea_buf;
5848                 info->oti_it_ea_buf_used = 1;
5849         } else {
5850                 OBD_ALLOC(oie->oie_buf, OSD_IT_EA_BUFSIZE);
5851                 if (oie->oie_buf == NULL)
5852                         RETURN(ERR_PTR(-ENOMEM));
5853         }
5854         oie->oie_obj             = obj;
5855
5856         file = &oie->oie_file;
5857
5858         /* Only FMODE_64BITHASH or FMODE_32BITHASH should be set, NOT both. */
5859         if (attr & LUDA_64BITHASH)
5860                 file->f_mode    = FMODE_64BITHASH;
5861         else
5862                 file->f_mode    = FMODE_32BITHASH;
5863         file->f_path.dentry     = obj_dentry;
5864         file->f_mapping         = obj->oo_inode->i_mapping;
5865         file->f_op              = obj->oo_inode->i_fop;
5866         set_file_inode(file, obj->oo_inode);
5867
5868         lu_object_get(lo);
5869         RETURN((struct dt_it *) oie);
5870 }
5871
5872 /**
5873  * Destroy or finishes iterator context.
5874  *
5875  * \param di iterator structure to be destroyed
5876  */
5877 static void osd_it_ea_fini(const struct lu_env *env, struct dt_it *di)
5878 {
5879         struct osd_thread_info  *info = osd_oti_get(env);
5880         struct osd_it_ea        *oie    = (struct osd_it_ea *)di;
5881         struct osd_object       *obj    = oie->oie_obj;
5882         struct inode            *inode  = obj->oo_inode;
5883
5884         ENTRY;
5885         oie->oie_file.f_op->release(inode, &oie->oie_file);
5886         osd_object_put(env, obj);
5887         if (unlikely(oie->oie_buf != info->oti_it_ea_buf))
5888                 OBD_FREE(oie->oie_buf, OSD_IT_EA_BUFSIZE);
5889         else
5890                 info->oti_it_ea_buf_used = 0;
5891         OBD_SLAB_FREE_PTR(oie, osd_itea_cachep);
5892         EXIT;
5893 }
5894
5895 /**
5896  * It position the iterator at given key, so that next lookup continues from
5897  * that key Or it is similar to dio_it->load() but based on a key,
5898  * rather than file position.
5899  *
5900  * As a special convention, osd_it_ea_get(env, di, "") has to rewind iterator
5901  * to the beginning.
5902  *
5903  * TODO: Presently return +1 considering it is only used by mdd_dir_is_empty().
5904  */
5905 static int osd_it_ea_get(const struct lu_env *env,
5906                          struct dt_it *di, const struct dt_key *key)
5907 {
5908         struct osd_it_ea     *it   = (struct osd_it_ea *)di;
5909
5910         ENTRY;
5911         LASSERT(((const char *)key)[0] == '\0');
5912         it->oie_file.f_pos      = 0;
5913         it->oie_rd_dirent       = 0;
5914         it->oie_it_dirent       = 0;
5915         it->oie_dirent          = NULL;
5916
5917         RETURN(+1);
5918 }
5919
5920 /**
5921  * Does nothing
5922  */
5923 static void osd_it_ea_put(const struct lu_env *env, struct dt_it *di)
5924 {
5925 }
5926
5927 struct osd_filldir_cbs {
5928 #ifdef HAVE_DIR_CONTEXT
5929         struct dir_context ctx;
5930 #endif
5931         struct osd_it_ea  *it;
5932 };
5933 /**
5934  * It is called internally by ->readdir(). It fills the
5935  * iterator's in-memory data structure with required
5936  * information i.e. name, namelen, rec_size etc.
5937  *
5938  * \param buf in which information to be filled in.
5939  * \param name name of the file in given dir
5940  *
5941  * \retval 0 on success
5942  * \retval 1 on buffer full
5943  */
5944 #ifdef HAVE_FILLDIR_USE_CTX
5945 static int osd_ldiskfs_filldir(struct dir_context *buf,
5946 #else
5947 static int osd_ldiskfs_filldir(void *buf,
5948 #endif
5949                                const char *name, int namelen,
5950                                loff_t offset, __u64 ino, unsigned d_type)
5951 {
5952         struct osd_it_ea        *it   =
5953                 ((struct osd_filldir_cbs *)buf)->it;
5954         struct osd_object       *obj  = it->oie_obj;
5955         struct osd_it_ea_dirent *ent  = it->oie_dirent;
5956         struct lu_fid           *fid  = &ent->oied_fid;
5957         struct osd_fid_pack     *rec;
5958         ENTRY;
5959
5960         /* this should never happen */
5961         if (unlikely(namelen == 0 || namelen > LDISKFS_NAME_LEN)) {
5962                 CERROR("ldiskfs return invalid namelen %d\n", namelen);
5963                 RETURN(-EIO);
5964         }
5965
5966         if ((void *) ent - it->oie_buf + sizeof(*ent) + namelen >
5967             OSD_IT_EA_BUFSIZE)
5968                 RETURN(1);
5969
5970         /* "." is just the object itself. */
5971         if (namelen == 1 && name[0] == '.') {
5972                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
5973         } else if (d_type & LDISKFS_DIRENT_LUFID) {
5974                 rec = (struct osd_fid_pack*) (name + namelen + 1);
5975                 if (osd_fid_unpack(fid, rec) != 0)
5976                         fid_zero(fid);
5977         } else {
5978                 fid_zero(fid);
5979         }
5980         d_type &= ~LDISKFS_DIRENT_LUFID;
5981
5982         /* NOT export local root. */
5983         if (unlikely(osd_sb(osd_obj2dev(obj))->s_root->d_inode->i_ino == ino)) {
5984                 ino = obj->oo_inode->i_ino;
5985                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
5986         }
5987
5988         ent->oied_ino     = ino;
5989         ent->oied_off     = offset;
5990         ent->oied_namelen = namelen;
5991         ent->oied_type    = d_type;
5992
5993         memcpy(ent->oied_name, name, namelen);
5994
5995         it->oie_rd_dirent++;
5996         it->oie_dirent = (void *) ent + cfs_size_round(sizeof(*ent) + namelen);
5997         RETURN(0);
5998 }
5999
6000 /**
6001  * Calls ->readdir() to load a directory entry at a time
6002  * and stored it in iterator's in-memory data structure.
6003  *
6004  * \param di iterator's in memory structure
6005  *
6006  * \retval   0 on success
6007  * \retval -ve on error
6008  * \retval +1 reach the end of entry
6009  */
6010 static int osd_ldiskfs_it_fill(const struct lu_env *env,
6011                                const struct dt_it *di)
6012 {
6013         struct osd_it_ea   *it    = (struct osd_it_ea *)di;
6014         struct osd_object  *obj   = it->oie_obj;
6015         struct inode       *inode = obj->oo_inode;
6016         struct htree_lock  *hlock = NULL;
6017         struct file        *filp  = &it->oie_file;
6018         int                 rc = 0;
6019         struct osd_filldir_cbs buf = {
6020 #ifdef HAVE_DIR_CONTEXT
6021                 .ctx.actor = osd_ldiskfs_filldir,
6022 #endif
6023                 .it = it
6024         };
6025
6026         ENTRY;
6027         it->oie_dirent = it->oie_buf;
6028         it->oie_rd_dirent = 0;
6029
6030         if (obj->oo_hl_head != NULL) {
6031                 hlock = osd_oti_get(env)->oti_hlock;
6032                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
6033                                    inode, LDISKFS_HLOCK_READDIR);
6034         } else {
6035                 down_read(&obj->oo_ext_idx_sem);
6036         }
6037
6038 #ifdef HAVE_DIR_CONTEXT
6039         buf.ctx.pos = filp->f_pos;
6040         rc = inode->i_fop->iterate(filp, &buf.ctx);
6041         filp->f_pos = buf.ctx.pos;
6042 #else
6043         rc = inode->i_fop->readdir(filp, &buf, osd_ldiskfs_filldir);
6044 #endif
6045
6046         if (hlock != NULL)
6047                 ldiskfs_htree_unlock(hlock);
6048         else
6049                 up_read(&obj->oo_ext_idx_sem);
6050
6051         if (it->oie_rd_dirent == 0) {
6052                 /*If it does not get any dirent, it means it has been reached
6053                  *to the end of the dir */
6054                 it->oie_file.f_pos = ldiskfs_get_htree_eof(&it->oie_file);
6055                 if (rc == 0)
6056                         rc = 1;
6057         } else {
6058                 it->oie_dirent = it->oie_buf;
6059                 it->oie_it_dirent = 1;
6060         }
6061
6062         RETURN(rc);
6063 }
6064
6065 /**
6066  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
6067  * to load a directory entry at a time and stored it in
6068  * iterator's in-memory data structure.
6069  *
6070  * \param di iterator's in memory structure
6071  *
6072  * \retval +ve iterator reached to end
6073  * \retval   0 iterator not reached to end
6074  * \retval -ve on error
6075  */
6076 static int osd_it_ea_next(const struct lu_env *env, struct dt_it *di)
6077 {
6078         struct osd_it_ea *it = (struct osd_it_ea *)di;
6079         int rc;
6080
6081         ENTRY;
6082
6083         if (it->oie_it_dirent < it->oie_rd_dirent) {
6084                 it->oie_dirent =
6085                         (void *) it->oie_dirent +
6086                         cfs_size_round(sizeof(struct osd_it_ea_dirent) +
6087                                        it->oie_dirent->oied_namelen);
6088                 it->oie_it_dirent++;
6089                 RETURN(0);
6090         } else {
6091                 if (it->oie_file.f_pos == ldiskfs_get_htree_eof(&it->oie_file))
6092                         rc = +1;
6093                 else
6094                         rc = osd_ldiskfs_it_fill(env, di);
6095         }
6096
6097         RETURN(rc);
6098 }
6099
6100 /**
6101  * Returns the key at current position from iterator's in memory structure.
6102  *
6103  * \param di iterator's in memory structure
6104  *
6105  * \retval key i.e. struct dt_key on success
6106  */
6107 static struct dt_key *osd_it_ea_key(const struct lu_env *env,
6108                                     const struct dt_it *di)
6109 {
6110         struct osd_it_ea *it = (struct osd_it_ea *)di;
6111
6112         return (struct dt_key *)it->oie_dirent->oied_name;
6113 }
6114
6115 /**
6116  * Returns the key's size at current position from iterator's in memory structure.
6117  *
6118  * \param di iterator's in memory structure
6119  *
6120  * \retval key_size i.e. struct dt_key on success
6121  */
6122 static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
6123 {
6124         struct osd_it_ea *it = (struct osd_it_ea *)di;
6125
6126         return it->oie_dirent->oied_namelen;
6127 }
6128
6129 static inline bool osd_dotdot_has_space(struct ldiskfs_dir_entry_2 *de)
6130 {
6131         if (LDISKFS_DIR_REC_LEN(de) >=
6132             __LDISKFS_DIR_REC_LEN(2 + 1 + sizeof(struct osd_fid_pack)))
6133                 return true;
6134
6135         return false;
6136 }
6137
6138 static inline bool
6139 osd_dirent_has_space(struct ldiskfs_dir_entry_2 *de, __u16 namelen,
6140                      unsigned blocksize, bool dotdot)
6141 {
6142         if (dotdot)
6143                 return osd_dotdot_has_space(de);
6144
6145         if (ldiskfs_rec_len_from_disk(de->rec_len, blocksize) >=
6146             __LDISKFS_DIR_REC_LEN(namelen + 1 + sizeof(struct osd_fid_pack)))
6147                 return true;
6148
6149         return false;
6150 }
6151
6152 static int
6153 osd_dirent_reinsert(const struct lu_env *env, struct osd_device *dev,
6154                     handle_t *jh, struct dentry *dentry,
6155                     const struct lu_fid *fid, struct buffer_head *bh,
6156                     struct ldiskfs_dir_entry_2 *de, struct htree_lock *hlock,
6157                     bool dotdot)
6158 {
6159         struct inode                *dir        = dentry->d_parent->d_inode;
6160         struct inode                *inode      = dentry->d_inode;
6161         struct osd_fid_pack         *rec;
6162         struct ldiskfs_dentry_param *ldp;
6163         int                          namelen    = dentry->d_name.len;
6164         int                          rc;
6165         struct osd_thread_info     *info        = osd_oti_get(env);
6166         ENTRY;
6167
6168         if (!LDISKFS_HAS_INCOMPAT_FEATURE(inode->i_sb,
6169                                           LDISKFS_FEATURE_INCOMPAT_DIRDATA))
6170                 RETURN(0);
6171
6172         /* There is enough space to hold the FID-in-dirent. */
6173         if (osd_dirent_has_space(de, namelen, dir->i_sb->s_blocksize, dotdot)) {
6174                 rc = ldiskfs_journal_get_write_access(jh, bh);
6175                 if (rc != 0)
6176                         RETURN(rc);
6177
6178                 de->name[namelen] = 0;
6179                 rec = (struct osd_fid_pack *)(de->name + namelen + 1);
6180                 rec->fp_len = sizeof(struct lu_fid) + 1;
6181                 fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
6182                 de->file_type |= LDISKFS_DIRENT_LUFID;
6183                 rc = ldiskfs_handle_dirty_metadata(jh, NULL, bh);
6184
6185                 RETURN(rc);
6186         }
6187
6188         LASSERT(!dotdot);
6189
6190         rc = ldiskfs_delete_entry(jh, dir, de, bh);
6191         if (rc != 0)
6192                 RETURN(rc);
6193
6194         ldp = (struct ldiskfs_dentry_param *)osd_oti_get(env)->oti_ldp;
6195         osd_get_ldiskfs_dirent_param(ldp, fid);
6196         dentry->d_fsdata = (void *)ldp;
6197         ll_vfs_dq_init(dir);
6198         rc = osd_ldiskfs_add_entry(info, dev, jh, dentry, inode, hlock);
6199         /* It is too bad, we cannot reinsert the name entry back.
6200          * That means we lose it! */
6201         if (rc != 0)
6202                 CDEBUG(D_LFSCK, "%s: fail to reinsert the dirent, "
6203                        "dir = %lu/%u, name = %.*s, "DFID": rc = %d\n",
6204                        osd_ino2name(inode),
6205                        dir->i_ino, dir->i_generation, namelen,
6206                        dentry->d_name.name, PFID(fid), rc);
6207
6208         RETURN(rc);
6209 }
6210
6211 static int
6212 osd_dirent_check_repair(const struct lu_env *env, struct osd_object *obj,
6213                         struct osd_it_ea *it, struct lu_fid *fid,
6214                         struct osd_inode_id *id, __u32 *attr)
6215 {
6216         struct osd_thread_info     *info        = osd_oti_get(env);
6217         struct lustre_mdt_attrs    *lma         = &info->oti_ost_attrs.loa_lma;
6218         struct osd_device          *dev         = osd_obj2dev(obj);
6219         struct super_block         *sb          = osd_sb(dev);
6220         const char                 *devname     = osd_name(dev);
6221         struct osd_it_ea_dirent    *ent         = it->oie_dirent;
6222         struct inode               *dir         = obj->oo_inode;
6223         struct htree_lock          *hlock       = NULL;
6224         struct buffer_head         *bh          = NULL;
6225         handle_t                   *jh          = NULL;
6226         struct ldiskfs_dir_entry_2 *de;
6227         struct dentry              *dentry;
6228         struct inode               *inode;
6229         const struct lu_fid *pfid = lu_object_fid(&obj->oo_dt.do_lu);
6230         int                         credits;
6231         int                         rc;
6232         bool                        dotdot      = false;
6233         bool                        dirty       = false;
6234         ENTRY;
6235
6236         if (ent->oied_name[0] == '.') {
6237                 if (ent->oied_namelen == 1)
6238                         RETURN(0);
6239
6240                 if (ent->oied_namelen == 2 && ent->oied_name[1] == '.')
6241                         dotdot = true;
6242         }
6243
6244         osd_id_gen(id, ent->oied_ino, OSD_OII_NOGEN);
6245         inode = osd_iget(info, dev, id);
6246         if (IS_ERR(inode)) {
6247                 rc = PTR_ERR(inode);
6248                 if (rc == -ENOENT || rc == -ESTALE) {
6249                         /* Maybe dangling name entry, or
6250                          * corrupted directory entry. */
6251                         *attr |= LUDA_UNKNOWN;
6252                         rc = 0;
6253                 } else {
6254                         CDEBUG(D_LFSCK, "%s: fail to iget() for dirent "
6255                                "check_repair, dir = %lu/%u, name = %.*s, "
6256                                "ino = %llu, rc = %d\n",
6257                                devname, dir->i_ino, dir->i_generation,
6258                                ent->oied_namelen, ent->oied_name,
6259                                ent->oied_ino, rc);
6260                 }
6261
6262                 RETURN(rc);
6263         }
6264
6265         dentry = osd_child_dentry_by_inode(env, dir, ent->oied_name,
6266                                            ent->oied_namelen);
6267         rc = osd_get_lma(info, inode, dentry, &info->oti_ost_attrs);
6268         if (rc == -ENODATA || !fid_is_sane(&lma->lma_self_fid))
6269                 lma = NULL;
6270         else if (rc != 0)
6271                 GOTO(out, rc);
6272
6273         /* We need to ensure that the name entry is still valid.
6274          * Because it may be removed or renamed by other already.
6275          *
6276          * The unlink or rename operation will start journal before PDO lock,
6277          * so to avoid deadlock, here we need to start journal handle before
6278          * related PDO lock also. But because we do not know whether there
6279          * will be something to be repaired before PDO lock, we just start
6280          * journal without conditions.
6281          *
6282          * We may need to remove the name entry firstly, then insert back.
6283          * One credit is for user quota file update.
6284          * One credit is for group quota file update.
6285          * Two credits are for dirty inode. */
6286         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE] +
6287                   osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1 + 1 + 2;
6288
6289         if (dev->od_dirent_journal != 0) {
6290
6291 again:
6292                 jh = osd_journal_start_sb(sb, LDISKFS_HT_MISC, credits);
6293                 if (IS_ERR(jh)) {
6294                         rc = PTR_ERR(jh);
6295                         CDEBUG(D_LFSCK, "%s: fail to start trans for dirent "
6296                                "check_repair, dir = %lu/%u, credits = %d, "
6297                                "name = %.*s, ino = %llu: rc = %d\n",
6298                                devname, dir->i_ino, dir->i_generation, credits,
6299                                ent->oied_namelen, ent->oied_name,
6300                                ent->oied_ino, rc);
6301
6302                         GOTO(out_inode, rc);
6303                 }
6304
6305                 if (obj->oo_hl_head != NULL) {
6306                         hlock = osd_oti_get(env)->oti_hlock;
6307                         /* "0" means exclusive lock for the whole directory.
6308                          * We need to prevent others access such name entry
6309                          * during the delete + insert. Neither HLOCK_ADD nor
6310                          * HLOCK_DEL cannot guarantee the atomicity. */
6311                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir, 0);
6312                 } else {
6313                         down_write(&obj->oo_ext_idx_sem);
6314                 }
6315         } else {
6316                 if (obj->oo_hl_head != NULL) {
6317                         hlock = osd_oti_get(env)->oti_hlock;
6318                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir,
6319                                            LDISKFS_HLOCK_LOOKUP);
6320                 } else {
6321                         down_read(&obj->oo_ext_idx_sem);
6322                 }
6323         }
6324
6325         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
6326         if (IS_ERR(bh) || le32_to_cpu(de->inode) != inode->i_ino) {
6327                 *attr |= LUDA_IGNORE;
6328
6329                 GOTO(out, rc = 0);
6330         }
6331
6332         /* For dotdot entry, if there is not enough space to hold the
6333          * FID-in-dirent, just keep them there. It only happens when the
6334          * device upgraded from 1.8 or restored from MDT file-level backup.
6335          * For the whole directory, only dotdot entry have no FID-in-dirent
6336          * and needs to get FID from LMA when readdir, it will not affect the
6337          * performance much. */
6338         if (dotdot && !osd_dotdot_has_space(de)) {
6339                 *attr |= LUDA_UNKNOWN;
6340
6341                 GOTO(out, rc = 0);
6342         }
6343
6344         if (lma != NULL) {
6345                 if (lu_fid_eq(fid, &lma->lma_self_fid))
6346                         GOTO(out, rc = 0);
6347
6348                 if (unlikely(lma->lma_compat & LMAC_NOT_IN_OI)) {
6349                         struct lu_fid *tfid = &lma->lma_self_fid;
6350
6351                         if (likely(dotdot &&
6352                                    fid_seq(tfid) == FID_SEQ_LOCAL_FILE &&
6353                                    fid_oid(tfid) == REMOTE_PARENT_DIR_OID)) {
6354                                 /* It must be REMOTE_PARENT_DIR and as the
6355                                  * 'dotdot' entry of remote directory */
6356                                 *attr |= LUDA_IGNORE;
6357                         } else {
6358                                 CDEBUG(D_LFSCK, "%s: expect remote agent "
6359                                        "parent directory, but got %.*s under "
6360                                        "dir = %lu/%u with the FID "DFID"\n",
6361                                        devname, ent->oied_namelen,
6362                                        ent->oied_name, dir->i_ino,
6363                                        dir->i_generation, PFID(tfid));
6364
6365                                 *attr |= LUDA_UNKNOWN;
6366                         }
6367
6368                         GOTO(out, rc = 0);
6369                 }
6370         }
6371
6372         if (!fid_is_zero(fid)) {
6373                 rc = osd_verify_ent_by_linkea(env, inode, pfid, ent->oied_name,
6374                                               ent->oied_namelen);
6375                 if (rc == -ENOENT ||
6376                     (rc == -ENODATA &&
6377                      !(dev->od_scrub.os_file.sf_flags & SF_UPGRADE))) {
6378                         /* linkEA does not recognize the dirent entry,
6379                          * it may because the dirent entry corruption
6380                          * and points to other's inode. */
6381                         CDEBUG(D_LFSCK, "%s: the target inode does not "
6382                                "recognize the dirent, dir = %lu/%u, "
6383                                " name = %.*s, ino = %llu, "
6384                                DFID": rc = %d\n", devname, dir->i_ino,
6385                                dir->i_generation, ent->oied_namelen,
6386                                ent->oied_name, ent->oied_ino, PFID(fid), rc);
6387                         *attr |= LUDA_UNKNOWN;
6388
6389                         GOTO(out, rc = 0);
6390                 }
6391
6392                 if (rc && rc != -ENODATA) {
6393                         CDEBUG(D_LFSCK, "%s: fail to verify FID in the dirent, "
6394                                "dir = %lu/%u, name = %.*s, ino = %llu, "
6395                                DFID": rc = %d\n", devname, dir->i_ino,
6396                                dir->i_generation, ent->oied_namelen,
6397                                ent->oied_name, ent->oied_ino, PFID(fid), rc);
6398                         *attr |= LUDA_UNKNOWN;
6399
6400                         GOTO(out, rc = 0);
6401                 }
6402         }
6403
6404         if (lma != NULL) {
6405                 /* linkEA recognizes the dirent entry, the FID-in-LMA is
6406                  * valid, trusted, in spite of fid_is_sane(fid) or not. */
6407                 if (*attr & LUDA_VERIFY_DRYRUN) {
6408                         *fid = lma->lma_self_fid;
6409                         *attr |= LUDA_REPAIR;
6410
6411                         GOTO(out, rc = 0);
6412                 }
6413
6414                 if (jh == NULL) {
6415                         brelse(bh);
6416                         dev->od_dirent_journal = 1;
6417                         if (hlock != NULL) {
6418                                 ldiskfs_htree_unlock(hlock);
6419                                 hlock = NULL;
6420                         } else {
6421                                 up_read(&obj->oo_ext_idx_sem);
6422                         }
6423
6424                         goto again;
6425                 }
6426
6427                 *fid = lma->lma_self_fid;
6428                 dirty = true;
6429                 /* Update or append the FID-in-dirent. */
6430                 rc = osd_dirent_reinsert(env, dev, jh, dentry, fid,
6431                                          bh, de, hlock, dotdot);
6432                 if (rc == 0)
6433                         *attr |= LUDA_REPAIR;
6434                 else
6435                         CDEBUG(D_LFSCK, "%s: fail to re-insert FID after "
6436                                "the dirent, dir = %lu/%u, name = %.*s, "
6437                                "ino = %llu, "DFID": rc = %d\n",
6438                                devname, dir->i_ino, dir->i_generation,
6439                                ent->oied_namelen, ent->oied_name,
6440                                ent->oied_ino, PFID(fid), rc);
6441         } else {
6442                 /* lma is NULL, trust the FID-in-dirent if it is valid. */
6443                 if (*attr & LUDA_VERIFY_DRYRUN) {
6444                         if (fid_is_sane(fid)) {
6445                                 *attr |= LUDA_REPAIR;
6446                         } else if (dev->od_index == 0) {
6447                                 lu_igif_build(fid, inode->i_ino,
6448                                               inode->i_generation);
6449                                 *attr |= LUDA_UPGRADE;
6450                         }
6451
6452                         GOTO(out, rc = 0);
6453                 }
6454
6455                 if (jh == NULL) {
6456                         brelse(bh);
6457                         dev->od_dirent_journal = 1;
6458                         if (hlock != NULL) {
6459                                 ldiskfs_htree_unlock(hlock);
6460                                 hlock = NULL;
6461                         } else {
6462                                 up_read(&obj->oo_ext_idx_sem);
6463                         }
6464
6465                         goto again;
6466                 }
6467
6468                 dirty = true;
6469                 if (unlikely(fid_is_sane(fid))) {
6470                         /* FID-in-dirent exists, but FID-in-LMA is lost.
6471                          * Trust the FID-in-dirent, and add FID-in-LMA. */
6472                         rc = osd_ea_fid_set(info, inode, fid, 0, 0);
6473                         if (rc == 0)
6474                                 *attr |= LUDA_REPAIR;
6475                         else
6476                                 CDEBUG(D_LFSCK, "%s: fail to set LMA for "
6477                                        "update dirent, dir = %lu/%u, "
6478                                        "name = %.*s, ino = %llu, "
6479                                        DFID": rc = %d\n",
6480                                        devname, dir->i_ino, dir->i_generation,
6481                                        ent->oied_namelen, ent->oied_name,
6482                                        ent->oied_ino, PFID(fid), rc);
6483                 } else if (dev->od_index == 0) {
6484                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
6485                         /* It is probably IGIF object. Only aappend the
6486                          * FID-in-dirent. OI scrub will process FID-in-LMA. */
6487                         rc = osd_dirent_reinsert(env, dev, jh, dentry, fid,
6488                                                  bh, de, hlock, dotdot);
6489                         if (rc == 0)
6490                                 *attr |= LUDA_UPGRADE;
6491                         else
6492                                 CDEBUG(D_LFSCK, "%s: fail to append IGIF "
6493                                        "after the dirent, dir = %lu/%u, "
6494                                        "name = %.*s, ino = %llu, "
6495                                        DFID": rc = %d\n",
6496                                        devname, dir->i_ino, dir->i_generation,
6497                                        ent->oied_namelen, ent->oied_name,
6498                                        ent->oied_ino, PFID(fid), rc);
6499                 }
6500         }
6501
6502         GOTO(out, rc);
6503
6504 out:
6505         if (!IS_ERR(bh))
6506                 brelse(bh);
6507         if (hlock != NULL) {
6508                 ldiskfs_htree_unlock(hlock);
6509         } else {
6510                 if (dev->od_dirent_journal != 0)
6511                         up_write(&obj->oo_ext_idx_sem);
6512                 else
6513                         up_read(&obj->oo_ext_idx_sem);
6514         }
6515
6516         if (jh != NULL)
6517                 ldiskfs_journal_stop(jh);
6518
6519 out_inode:
6520         iput(inode);
6521         if (rc >= 0 && !dirty)
6522                 dev->od_dirent_journal = 0;
6523
6524         return rc;
6525 }
6526
6527 /**
6528  * Returns the value at current position from iterator's in memory structure.
6529  *
6530  * \param di struct osd_it_ea, iterator's in memory structure
6531  * \param attr attr requested for dirent.
6532  * \param lde lustre dirent
6533  *
6534  * \retval   0 no error and \param lde has correct lustre dirent.
6535  * \retval -ve on error
6536  */
6537 static inline int osd_it_ea_rec(const struct lu_env *env,
6538                                 const struct dt_it *di,
6539                                 struct dt_rec *dtrec, __u32 attr)
6540 {
6541         struct osd_it_ea       *it    = (struct osd_it_ea *)di;
6542         struct osd_object      *obj   = it->oie_obj;
6543         struct osd_device      *dev   = osd_obj2dev(obj);
6544         struct osd_thread_info *oti   = osd_oti_get(env);
6545         struct osd_inode_id    *id    = &oti->oti_id;
6546         struct lu_fid          *fid   = &it->oie_dirent->oied_fid;
6547         struct lu_dirent       *lde   = (struct lu_dirent *)dtrec;
6548         __u32                   ino   = it->oie_dirent->oied_ino;
6549         int                     rc    = 0;
6550         ENTRY;
6551
6552         LASSERT(obj->oo_inode != dev->od_mdt_map->omm_remote_parent->d_inode);
6553
6554         if (attr & LUDA_VERIFY) {
6555                 if (unlikely(ino == osd_remote_parent_ino(dev))) {
6556                         attr |= LUDA_IGNORE;
6557                         /* If the parent is on remote MDT, and there
6558                          * is no FID-in-dirent, then we have to get
6559                          * the parent FID from the linkEA.  */
6560                         if (!fid_is_sane(fid) &&
6561                             it->oie_dirent->oied_namelen == 2 &&
6562                             it->oie_dirent->oied_name[0] == '.' &&
6563                             it->oie_dirent->oied_name[1] == '.')
6564                                 osd_get_pfid_from_linkea(env, obj, fid);
6565                 } else {
6566                         rc = osd_dirent_check_repair(env, obj, it, fid, id,
6567                                                      &attr);
6568                 }
6569
6570                 if (!fid_is_sane(fid))
6571                         attr |= LUDA_UNKNOWN;
6572         } else {
6573                 attr &= ~LU_DIRENT_ATTRS_MASK;
6574                 if (!fid_is_sane(fid)) {
6575                         bool is_dotdot = false;
6576                         if (it->oie_dirent->oied_namelen == 2 &&
6577                             it->oie_dirent->oied_name[0] == '.' &&
6578                             it->oie_dirent->oied_name[1] == '.')
6579                                 is_dotdot = true;
6580                         /* If the parent is on remote MDT, and there
6581                          * is no FID-in-dirent, then we have to get
6582                          * the parent FID from the linkEA.  */
6583                         if (ino == osd_remote_parent_ino(dev) && is_dotdot) {
6584                                 rc = osd_get_pfid_from_linkea(env, obj, fid);
6585                         } else {
6586                                 if (is_dotdot == false &&
6587                                     OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP))
6588                                         RETURN(-ENOENT);
6589
6590                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
6591                         }
6592                 } else {
6593                         osd_id_gen(id, ino, OSD_OII_NOGEN);
6594                 }
6595         }
6596
6597         /* Pack the entry anyway, at least the offset is right. */
6598         osd_it_pack_dirent(lde, fid, it->oie_dirent->oied_off,
6599                            it->oie_dirent->oied_name,
6600                            it->oie_dirent->oied_namelen,
6601                            it->oie_dirent->oied_type, attr);
6602
6603         if (rc < 0)
6604                 RETURN(rc);
6605
6606         if (osd_remote_fid(env, dev, fid))
6607                 RETURN(0);
6608
6609         if (likely(!(attr & (LUDA_IGNORE | LUDA_UNKNOWN)) && rc == 0))
6610                 osd_add_oi_cache(oti, dev, id, fid);
6611
6612         RETURN(rc > 0 ? 0 : rc);
6613 }
6614
6615 /**
6616  * Returns the record size size at current position.
6617  *
6618  * This function will return record(lu_dirent) size in bytes.
6619  *
6620  * \param[in] env       execution environment
6621  * \param[in] di        iterator's in memory structure
6622  * \param[in] attr      attribute of the entry, only requires LUDA_TYPE to
6623  *                      calculate the lu_dirent size.
6624  *
6625  * \retval      record size(in bytes & in memory) of the current lu_dirent
6626  *              entry.
6627  */
6628 static int osd_it_ea_rec_size(const struct lu_env *env, const struct dt_it *di,
6629                               __u32 attr)
6630 {
6631         struct osd_it_ea *it = (struct osd_it_ea *)di;
6632
6633         return lu_dirent_calc_size(it->oie_dirent->oied_namelen, attr);
6634 }
6635
6636 /**
6637  * Returns a cookie for current position of the iterator head, so that
6638  * user can use this cookie to load/start the iterator next time.
6639  *
6640  * \param di iterator's in memory structure
6641  *
6642  * \retval cookie for current position, on success
6643  */
6644 static __u64 osd_it_ea_store(const struct lu_env *env, const struct dt_it *di)
6645 {
6646         struct osd_it_ea *it = (struct osd_it_ea *)di;
6647
6648         return it->oie_dirent->oied_off;
6649 }
6650
6651 /**
6652  * It calls osd_ldiskfs_it_fill() which will use ->readdir()
6653  * to load a directory entry at a time and stored it i inn,
6654  * in iterator's in-memory data structure.
6655  *
6656  * \param di struct osd_it_ea, iterator's in memory structure
6657  *
6658  * \retval +ve on success
6659  * \retval -ve on error
6660  */
6661 static int osd_it_ea_load(const struct lu_env *env,
6662                           const struct dt_it *di, __u64 hash)
6663 {
6664         struct osd_it_ea *it = (struct osd_it_ea *)di;
6665         int rc;
6666
6667         ENTRY;
6668         it->oie_file.f_pos = hash;
6669
6670         rc =  osd_ldiskfs_it_fill(env, di);
6671         if (rc > 0)
6672                 rc = -ENODATA;
6673
6674         if (rc == 0)
6675                 rc = +1;
6676
6677         RETURN(rc);
6678 }
6679
6680 /**
6681  * Index lookup function for interoperability mode (b11826).
6682  *
6683  * \param key,  key i.e. file name to be searched
6684  *
6685  * \retval +ve, on success
6686  * \retval -ve, on error
6687  */
6688 static int osd_index_ea_lookup(const struct lu_env *env, struct dt_object *dt,
6689                                struct dt_rec *rec, const struct dt_key *key)
6690 {
6691         struct osd_object *obj = osd_dt_obj(dt);
6692         int rc = 0;
6693
6694         ENTRY;
6695
6696         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
6697         LINVRNT(osd_invariant(obj));
6698
6699         rc = osd_ea_lookup_rec(env, obj, rec, key);
6700         if (rc == 0)
6701                 rc = +1;
6702         RETURN(rc);
6703 }
6704
6705 /**
6706  * Index and Iterator operations for interoperability
6707  * mode (i.e. to run 2.0 mds on 1.8 disk) (b11826)
6708  */
6709 static const struct dt_index_operations osd_index_ea_ops = {
6710         .dio_lookup         = osd_index_ea_lookup,
6711         .dio_declare_insert = osd_index_declare_ea_insert,
6712         .dio_insert         = osd_index_ea_insert,
6713         .dio_declare_delete = osd_index_declare_ea_delete,
6714         .dio_delete         = osd_index_ea_delete,
6715         .dio_it     = {
6716                 .init     = osd_it_ea_init,
6717                 .fini     = osd_it_ea_fini,
6718                 .get      = osd_it_ea_get,
6719                 .put      = osd_it_ea_put,
6720                 .next     = osd_it_ea_next,
6721                 .key      = osd_it_ea_key,
6722                 .key_size = osd_it_ea_key_size,
6723                 .rec      = osd_it_ea_rec,
6724                 .rec_size = osd_it_ea_rec_size,
6725                 .store    = osd_it_ea_store,
6726                 .load     = osd_it_ea_load
6727         }
6728 };
6729
6730 static void *osd_key_init(const struct lu_context *ctx,
6731                           struct lu_context_key *key)
6732 {
6733         struct osd_thread_info *info;
6734
6735         OBD_ALLOC_PTR(info);
6736         if (info == NULL)
6737                 return ERR_PTR(-ENOMEM);
6738
6739         OBD_ALLOC(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
6740         if (info->oti_it_ea_buf == NULL)
6741                 goto out_free_info;
6742
6743         info->oti_env = container_of(ctx, struct lu_env, le_ctx);
6744
6745         info->oti_hlock = ldiskfs_htree_lock_alloc();
6746         if (info->oti_hlock == NULL)
6747                 goto out_free_ea;
6748
6749         return info;
6750
6751  out_free_ea:
6752         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
6753  out_free_info:
6754         OBD_FREE_PTR(info);
6755         return ERR_PTR(-ENOMEM);
6756 }
6757
6758 static void osd_key_fini(const struct lu_context *ctx,
6759                          struct lu_context_key *key, void* data)
6760 {
6761         struct osd_thread_info *info = data;
6762         struct ldiskfs_inode_info *lli = LDISKFS_I(info->oti_inode);
6763         struct osd_idmap_cache  *idc = info->oti_ins_cache;
6764
6765         if (info->oti_inode != NULL)
6766                 OBD_FREE_PTR(lli);
6767         if (info->oti_hlock != NULL)
6768                 ldiskfs_htree_lock_free(info->oti_hlock);
6769         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
6770         lu_buf_free(&info->oti_iobuf.dr_pg_buf);
6771         lu_buf_free(&info->oti_iobuf.dr_bl_buf);
6772         lu_buf_free(&info->oti_big_buf);
6773         if (idc != NULL) {
6774                 LASSERT(info->oti_ins_cache_size > 0);
6775                 OBD_FREE(idc, sizeof(*idc) * info->oti_ins_cache_size);
6776                 info->oti_ins_cache = NULL;
6777                 info->oti_ins_cache_size = 0;
6778         }
6779         OBD_FREE_PTR(info);
6780 }
6781
6782 static void osd_key_exit(const struct lu_context *ctx,
6783                          struct lu_context_key *key, void *data)
6784 {
6785         struct osd_thread_info *info = data;
6786
6787         LASSERT(info->oti_r_locks == 0);
6788         LASSERT(info->oti_w_locks == 0);
6789         LASSERT(info->oti_txns    == 0);
6790 }
6791
6792 /* type constructor/destructor: osd_type_init, osd_type_fini */
6793 LU_TYPE_INIT_FINI(osd, &osd_key);
6794
6795 struct lu_context_key osd_key = {
6796         .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL,
6797         .lct_init = osd_key_init,
6798         .lct_fini = osd_key_fini,
6799         .lct_exit = osd_key_exit
6800 };
6801
6802
6803 static int osd_device_init(const struct lu_env *env, struct lu_device *d,
6804                            const char *name, struct lu_device *next)
6805 {
6806         struct osd_device *osd = osd_dev(d);
6807
6808         if (strlcpy(osd->od_svname, name, sizeof(osd->od_svname))
6809             >= sizeof(osd->od_svname))
6810                 return -E2BIG;
6811         return osd_procfs_init(osd, name);
6812 }
6813
6814 static int osd_fid_init(const struct lu_env *env, struct osd_device *osd)
6815 {
6816         struct seq_server_site  *ss = osd_seq_site(osd);
6817         int                     rc;
6818         ENTRY;
6819
6820         if (osd->od_is_ost || osd->od_cl_seq != NULL)
6821                 RETURN(0);
6822
6823         if (unlikely(ss == NULL))
6824                 RETURN(-ENODEV);
6825
6826         OBD_ALLOC_PTR(osd->od_cl_seq);
6827         if (osd->od_cl_seq == NULL)
6828                 RETURN(-ENOMEM);
6829
6830         rc = seq_client_init(osd->od_cl_seq, NULL, LUSTRE_SEQ_METADATA,
6831                              osd->od_svname, ss->ss_server_seq);
6832         if (rc != 0) {
6833                 OBD_FREE_PTR(osd->od_cl_seq);
6834                 osd->od_cl_seq = NULL;
6835                 RETURN(rc);
6836         }
6837
6838         if (ss->ss_node_id == 0) {
6839                 /* If the OSD on the sequence controller(MDT0), then allocate
6840                  * sequence here, otherwise allocate sequence after connected
6841                  * to MDT0 (see mdt_register_lwp_callback()). */
6842                 rc = seq_server_alloc_meta(osd->od_cl_seq->lcs_srv,
6843                                    &osd->od_cl_seq->lcs_space, env);
6844         }
6845
6846         RETURN(rc);
6847 }
6848
6849 static void osd_fid_fini(const struct lu_env *env, struct osd_device *osd)
6850 {
6851         if (osd->od_cl_seq == NULL)
6852                 return;
6853
6854         seq_client_fini(osd->od_cl_seq);
6855         OBD_FREE_PTR(osd->od_cl_seq);
6856         osd->od_cl_seq = NULL;
6857 }
6858
6859 static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
6860 {
6861         ENTRY;
6862
6863         /* shutdown quota slave instance associated with the device */
6864         if (o->od_quota_slave != NULL) {
6865                 qsd_fini(env, o->od_quota_slave);
6866                 o->od_quota_slave = NULL;
6867         }
6868
6869         osd_fid_fini(env, o);
6870
6871         RETURN(0);
6872 }
6873
6874 static void osd_umount(const struct lu_env *env, struct osd_device *o)
6875 {
6876         ENTRY;
6877
6878         if (o->od_mnt != NULL) {
6879                 shrink_dcache_sb(osd_sb(o));
6880                 osd_sync(env, &o->od_dt_dev);
6881
6882                 mntput(o->od_mnt);
6883                 o->od_mnt = NULL;
6884         }
6885
6886         EXIT;
6887 }
6888
6889 static int osd_mount(const struct lu_env *env,
6890                      struct osd_device *o, struct lustre_cfg *cfg)
6891 {
6892         const char              *name  = lustre_cfg_string(cfg, 0);
6893         const char              *dev  = lustre_cfg_string(cfg, 1);
6894         const char              *opts;
6895         unsigned long            page, s_flags, lmd_flags = 0;
6896         struct page             *__page;
6897         struct file_system_type *type;
6898         char                    *options = NULL;
6899         char                    *str;
6900         struct osd_thread_info  *info = osd_oti_get(env);
6901         struct lu_fid           *fid = &info->oti_fid;
6902         struct inode            *inode;
6903         int                      rc = 0, force_over_512tb = 0;
6904         ENTRY;
6905
6906         if (o->od_mnt != NULL)
6907                 RETURN(0);
6908
6909         if (strlen(dev) >= sizeof(o->od_mntdev))
6910                 RETURN(-E2BIG);
6911         strcpy(o->od_mntdev, dev);
6912
6913         str = lustre_cfg_string(cfg, 2);
6914         s_flags = simple_strtoul(str, NULL, 0);
6915         str = strstr(str, ":");
6916         if (str)
6917                 lmd_flags = simple_strtoul(str + 1, NULL, 0);
6918         opts = lustre_cfg_string(cfg, 3);
6919 #ifdef __BIG_ENDIAN
6920         if (opts == NULL || strstr(opts, "bigendian_extents") == NULL) {
6921                 CERROR("%s: device %s extents feature is not guaranteed to "
6922                        "work on big-endian systems. Use \"bigendian_extents\" "
6923                        "mount option to override.\n", name, dev);
6924                 RETURN(-EINVAL);
6925         }
6926 #endif
6927 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
6928         if (opts != NULL && strstr(opts, "force_over_128tb") != NULL) {
6929                 CWARN("force_over_128tb option is deprecated. "
6930                       "Filesystems less than 512TB can be created without any "
6931                       "force options. Use force_over_512tb option for "
6932                       "filesystems greater than 512TB.\n");
6933         }
6934 #endif
6935 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 1, 53, 0)
6936         if (opts != NULL && strstr(opts, "force_over_256tb") != NULL) {
6937                 CWARN("force_over_256tb option is deprecated. "
6938                       "Filesystems less than 512TB can be created without any "
6939                       "force options. Use force_over_512tb option for "
6940                       "filesystems greater than 512TB.\n");
6941         }
6942 #endif
6943
6944         if (opts != NULL && strstr(opts, "force_over_512tb") != NULL)
6945                 force_over_512tb = 1;
6946
6947         __page = alloc_page(GFP_KERNEL);
6948         if (__page == NULL)
6949                 GOTO(out, rc = -ENOMEM);
6950         page = (unsigned long)page_address(__page);
6951         options = (char *)page;
6952         *options = '\0';
6953         if (opts != NULL) {
6954                 /* strip out the options for back compatiblity */
6955                 static char *sout[] = {
6956                         "mballoc",
6957                         "iopen",
6958                         "noiopen",
6959                         "iopen_nopriv",
6960                         "extents",
6961                         "noextents",
6962                         /* strip out option we processed in osd */
6963                         "bigendian_extents",
6964                         "force_over_128tb",
6965                         "force_over_256tb",
6966                         "force_over_512tb",
6967                         NULL
6968                 };
6969                 strcat(options, opts);
6970                 for (rc = 0, str = options; sout[rc]; ) {
6971                         char *op = strstr(str, sout[rc]);
6972                         if (op == NULL) {
6973                                 rc++;
6974                                 str = options;
6975                                 continue;
6976                         }
6977                         if (op == options || *(op - 1) == ',') {
6978                                 str = op + strlen(sout[rc]);
6979                                 if (*str == ',' || *str == '\0') {
6980                                         *str == ',' ? str++ : str;
6981                                         memmove(op, str, strlen(str) + 1);
6982                                 }
6983                         }
6984                         for (str = op; *str != ',' && *str != '\0'; str++)
6985                                 ;
6986                 }
6987         } else {
6988                 strncat(options, "user_xattr,acl", 14);
6989         }
6990
6991         /* Glom up mount options */
6992         if (*options != '\0')
6993                 strcat(options, ",");
6994         strlcat(options, "no_mbcache,nodelalloc", PAGE_SIZE);
6995
6996         type = get_fs_type("ldiskfs");
6997         if (!type) {
6998                 CERROR("%s: cannot find ldiskfs module\n", name);
6999                 GOTO(out, rc = -ENODEV);
7000         }
7001
7002         o->od_mnt = vfs_kern_mount(type, s_flags, dev, options);
7003         module_put(type->owner);
7004
7005         if (IS_ERR(o->od_mnt)) {
7006                 rc = PTR_ERR(o->od_mnt);
7007                 o->od_mnt = NULL;
7008                 CERROR("%s: can't mount %s: %d\n", name, dev, rc);
7009                 GOTO(out, rc);
7010         }
7011
7012         if (ldiskfs_blocks_count(LDISKFS_SB(osd_sb(o))->s_es) <<
7013                                  osd_sb(o)->s_blocksize_bits > 512ULL << 40 &&
7014                                  force_over_512tb == 0) {
7015                 CERROR("%s: device %s LDISKFS does not support filesystems "
7016                        "greater than 512TB and can cause data corruption. "
7017                        "Use \"force_over_512tb\" mount option to override.\n",
7018                        name, dev);
7019                 GOTO(out_mnt, rc = -EINVAL);
7020         }
7021
7022         if (lmd_flags & LMD_FLG_DEV_RDONLY) {
7023                 if (priv_dev_set_rdonly) {
7024                         priv_dev_set_rdonly(osd_sb(o)->s_bdev);
7025                         o->od_dt_dev.dd_rdonly = 1;
7026                         LCONSOLE_WARN("%s: set dev_rdonly on this device\n",
7027                                       name);
7028                 } else {
7029                         LCONSOLE_WARN("%s: not support dev_rdonly on this device",
7030                                       name);
7031
7032                         GOTO(out_mnt, rc = -EOPNOTSUPP);
7033                 }
7034         } else if (priv_dev_check_rdonly &&
7035                    priv_dev_check_rdonly(osd_sb(o)->s_bdev)) {
7036                 CERROR("%s: underlying device %s is marked as "
7037                        "read-only. Setup failed\n", name, dev);
7038
7039                 GOTO(out_mnt, rc = -EROFS);
7040         }
7041
7042         if (!LDISKFS_HAS_COMPAT_FEATURE(o->od_mnt->mnt_sb,
7043                                         LDISKFS_FEATURE_COMPAT_HAS_JOURNAL)) {
7044                 CERROR("%s: device %s is mounted w/o journal\n", name, dev);
7045                 GOTO(out_mnt, rc = -EINVAL);
7046         }
7047
7048 #ifdef LDISKFS_MOUNT_DIRDATA
7049         if (LDISKFS_HAS_INCOMPAT_FEATURE(o->od_mnt->mnt_sb,
7050                                          LDISKFS_FEATURE_INCOMPAT_DIRDATA))
7051                 LDISKFS_SB(osd_sb(o))->s_mount_opt |= LDISKFS_MOUNT_DIRDATA;
7052         else if (!o->od_is_ost)
7053                 CWARN("%s: device %s was upgraded from Lustre-1.x without "
7054                       "enabling the dirdata feature. If you do not want to "
7055                       "downgrade to Lustre-1.x again, you can enable it via "
7056                       "'tune2fs -O dirdata device'\n", name, dev);
7057 #endif
7058         inode = osd_sb(o)->s_root->d_inode;
7059         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
7060         rc = osd_ea_fid_set(info, inode, fid, LMAC_NOT_IN_OI, 0);
7061         if (rc != 0) {
7062                 CERROR("%s: failed to set lma on %s root inode\n", name, dev);
7063                 GOTO(out_mnt, rc);
7064         }
7065
7066         if (lmd_flags & LMD_FLG_NOSCRUB)
7067                 o->od_noscrub = 1;
7068
7069         GOTO(out, rc = 0);
7070
7071 out_mnt:
7072         mntput(o->od_mnt);
7073         o->od_mnt = NULL;
7074
7075 out:
7076         if (__page)
7077                 __free_page(__page);
7078
7079         return rc;
7080 }
7081
7082 static struct lu_device *osd_device_fini(const struct lu_env *env,
7083                                          struct lu_device *d)
7084 {
7085         struct osd_device *o = osd_dev(d);
7086         ENTRY;
7087
7088         osd_shutdown(env, o);
7089         osd_procfs_fini(o);
7090         osd_scrub_cleanup(env, o);
7091         osd_obj_map_fini(o);
7092         osd_umount(env, o);
7093
7094         RETURN(NULL);
7095 }
7096
7097 static int osd_device_init0(const struct lu_env *env,
7098                             struct osd_device *o,
7099                             struct lustre_cfg *cfg)
7100 {
7101         struct lu_device        *l = osd2lu_dev(o);
7102         struct osd_thread_info *info;
7103         int                     rc;
7104         int                     cplen = 0;
7105
7106         /* if the module was re-loaded, env can loose its keys */
7107         rc = lu_env_refill((struct lu_env *) env);
7108         if (rc)
7109                 GOTO(out, rc);
7110         info = osd_oti_get(env);
7111         LASSERT(info);
7112
7113         l->ld_ops = &osd_lu_ops;
7114         o->od_dt_dev.dd_ops = &osd_dt_ops;
7115
7116         spin_lock_init(&o->od_osfs_lock);
7117         mutex_init(&o->od_otable_mutex);
7118         INIT_LIST_HEAD(&o->od_orphan_list);
7119
7120         o->od_read_cache = 1;
7121         o->od_writethrough_cache = 1;
7122         o->od_readcache_max_filesize = OSD_MAX_CACHE_SIZE;
7123
7124         cplen = strlcpy(o->od_svname, lustre_cfg_string(cfg, 4),
7125                         sizeof(o->od_svname));
7126         if (cplen >= sizeof(o->od_svname)) {
7127                 rc = -E2BIG;
7128                 GOTO(out, rc);
7129         }
7130
7131         o->od_index = -1; /* -1 means index is invalid */
7132         rc = server_name2index(o->od_svname, &o->od_index, NULL);
7133         if (rc == LDD_F_SV_TYPE_OST)
7134                 o->od_is_ost = 1;
7135
7136         o->od_full_scrub_ratio = OFSR_DEFAULT;
7137         o->od_full_scrub_threshold_rate = FULL_SCRUB_THRESHOLD_RATE_DEFAULT;
7138         rc = osd_mount(env, o, cfg);
7139         if (rc != 0)
7140                 GOTO(out, rc);
7141
7142         rc = osd_obj_map_init(env, o);
7143         if (rc != 0)
7144                 GOTO(out_mnt, rc);
7145
7146         rc = lu_site_init(&o->od_site, l);
7147         if (rc != 0)
7148                 GOTO(out_compat, rc);
7149         o->od_site.ls_bottom_dev = l;
7150
7151         rc = lu_site_init_finish(&o->od_site);
7152         if (rc != 0)
7153                 GOTO(out_site, rc);
7154
7155         INIT_LIST_HEAD(&o->od_ios_list);
7156         /* setup scrub, including OI files initialization */
7157         rc = osd_scrub_setup(env, o);
7158         if (rc < 0)
7159                 GOTO(out_site, rc);
7160
7161         rc = osd_procfs_init(o, o->od_svname);
7162         if (rc != 0) {
7163                 CERROR("%s: can't initialize procfs: rc = %d\n",
7164                        o->od_svname, rc);
7165                 GOTO(out_scrub, rc);
7166         }
7167
7168         LASSERT(l->ld_site->ls_linkage.next != NULL);
7169         LASSERT(l->ld_site->ls_linkage.prev != NULL);
7170
7171         /* initialize quota slave instance */
7172         o->od_quota_slave = qsd_init(env, o->od_svname, &o->od_dt_dev,
7173                                      o->od_proc_entry);
7174         if (IS_ERR(o->od_quota_slave)) {
7175                 rc = PTR_ERR(o->od_quota_slave);
7176                 o->od_quota_slave = NULL;
7177                 GOTO(out_procfs, rc);
7178         }
7179
7180         RETURN(0);
7181
7182 out_procfs:
7183         osd_procfs_fini(o);
7184 out_scrub:
7185         osd_scrub_cleanup(env, o);
7186 out_site:
7187         lu_site_fini(&o->od_site);
7188 out_compat:
7189         osd_obj_map_fini(o);
7190 out_mnt:
7191         osd_umount(env, o);
7192 out:
7193         return rc;
7194 }
7195
7196 static struct lu_device *osd_device_alloc(const struct lu_env *env,
7197                                           struct lu_device_type *t,
7198                                           struct lustre_cfg *cfg)
7199 {
7200         struct osd_device *o;
7201         int                rc;
7202
7203         OBD_ALLOC_PTR(o);
7204         if (o == NULL)
7205                 return ERR_PTR(-ENOMEM);
7206
7207         rc = dt_device_init(&o->od_dt_dev, t);
7208         if (rc == 0) {
7209                 /* Because the ctx might be revived in dt_device_init,
7210                  * refill the env here */
7211                 lu_env_refill((struct lu_env *)env);
7212                 rc = osd_device_init0(env, o, cfg);
7213                 if (rc)
7214                         dt_device_fini(&o->od_dt_dev);
7215         }
7216
7217         if (unlikely(rc != 0))
7218                 OBD_FREE_PTR(o);
7219
7220         return rc == 0 ? osd2lu_dev(o) : ERR_PTR(rc);
7221 }
7222
7223 static struct lu_device *osd_device_free(const struct lu_env *env,
7224                                          struct lu_device *d)
7225 {
7226         struct osd_device *o = osd_dev(d);
7227         ENTRY;
7228
7229         /* XXX: make osd top device in order to release reference */
7230         d->ld_site->ls_top_dev = d;
7231         lu_site_purge(env, d->ld_site, -1);
7232         if (!cfs_hash_is_empty(d->ld_site->ls_obj_hash)) {
7233                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
7234                 lu_site_print(env, d->ld_site, &msgdata, lu_cdebug_printer);
7235         }
7236         lu_site_fini(&o->od_site);
7237         dt_device_fini(&o->od_dt_dev);
7238         OBD_FREE_PTR(o);
7239         RETURN(NULL);
7240 }
7241
7242 static int osd_process_config(const struct lu_env *env,
7243                               struct lu_device *d, struct lustre_cfg *cfg)
7244 {
7245         struct osd_device               *o = osd_dev(d);
7246         int                             rc;
7247         ENTRY;
7248
7249         switch (cfg->lcfg_command) {
7250         case LCFG_SETUP:
7251                 rc = osd_mount(env, o, cfg);
7252                 break;
7253         case LCFG_CLEANUP:
7254                 lu_dev_del_linkage(d->ld_site, d);
7255                 rc = osd_shutdown(env, o);
7256                 break;
7257         case LCFG_PARAM:
7258                 LASSERT(&o->od_dt_dev);
7259                 rc = class_process_proc_param(PARAM_OSD, lprocfs_osd_obd_vars,
7260                                               cfg, &o->od_dt_dev);
7261                 if (rc > 0 || rc == -ENOSYS) {
7262                         rc = class_process_proc_param(PARAM_OST,
7263                                                       lprocfs_osd_obd_vars,
7264                                                       cfg, &o->od_dt_dev);
7265                         if (rc > 0)
7266                                 rc = 0;
7267                 }
7268                 break;
7269         default:
7270                 rc = -ENOSYS;
7271         }
7272
7273         RETURN(rc);
7274 }
7275
7276 static int osd_recovery_complete(const struct lu_env *env,
7277                                  struct lu_device *d)
7278 {
7279         struct osd_device       *osd = osd_dev(d);
7280         int                      rc = 0;
7281         ENTRY;
7282
7283         if (osd->od_quota_slave == NULL)
7284                 RETURN(0);
7285
7286         /* start qsd instance on recovery completion, this notifies the quota
7287          * slave code that we are about to process new requests now */
7288         rc = qsd_start(env, osd->od_quota_slave);
7289         RETURN(rc);
7290 }
7291
7292 /*
7293  * we use exports to track all osd users
7294  */
7295 static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
7296                            struct obd_device *obd, struct obd_uuid *cluuid,
7297                            struct obd_connect_data *data, void *localdata)
7298 {
7299         struct osd_device    *osd = osd_dev(obd->obd_lu_dev);
7300         struct lustre_handle  conn;
7301         int                   rc;
7302         ENTRY;
7303
7304         CDEBUG(D_CONFIG, "connect #%d\n", osd->od_connects);
7305
7306         rc = class_connect(&conn, obd, cluuid);
7307         if (rc)
7308                 RETURN(rc);
7309
7310         *exp = class_conn2export(&conn);
7311
7312         spin_lock(&osd->od_osfs_lock);
7313         osd->od_connects++;
7314         spin_unlock(&osd->od_osfs_lock);
7315
7316         RETURN(0);
7317 }
7318
7319 /*
7320  * once last export (we don't count self-export) disappeared
7321  * osd can be released
7322  */
7323 static int osd_obd_disconnect(struct obd_export *exp)
7324 {
7325         struct obd_device *obd = exp->exp_obd;
7326         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
7327         int                rc, release = 0;
7328         ENTRY;
7329
7330         /* Only disconnect the underlying layers on the final disconnect. */
7331         spin_lock(&osd->od_osfs_lock);
7332         osd->od_connects--;
7333         if (osd->od_connects == 0)
7334                 release = 1;
7335         spin_unlock(&osd->od_osfs_lock);
7336
7337         rc = class_disconnect(exp); /* bz 9811 */
7338
7339         if (rc == 0 && release)
7340                 class_manual_cleanup(obd);
7341         RETURN(rc);
7342 }
7343
7344 static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
7345                        struct lu_device *dev)
7346 {
7347         struct osd_device       *osd    = osd_dev(dev);
7348         struct lr_server_data   *lsd    =
7349                         &osd->od_dt_dev.dd_lu_dev.ld_site->ls_tgt->lut_lsd;
7350         int                      result = 0;
7351         ENTRY;
7352
7353         if (osd->od_quota_slave != NULL) {
7354                 /* set up quota slave objects */
7355                 result = qsd_prepare(env, osd->od_quota_slave);
7356                 if (result != 0)
7357                         RETURN(result);
7358         }
7359
7360         if (lsd->lsd_feature_incompat & OBD_COMPAT_OST) {
7361 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 52, 0)
7362                 if (lsd->lsd_feature_rocompat & OBD_ROCOMPAT_IDX_IN_IDIF) {
7363                         osd->od_index_in_idif = 1;
7364                 } else {
7365                         osd->od_index_in_idif = 0;
7366                         result = osd_register_proc_index_in_idif(osd);
7367                         if (result != 0)
7368                                 RETURN(result);
7369                 }
7370 #else
7371                 osd->od_index_in_idif = 1;
7372 #endif
7373         }
7374
7375         result = osd_fid_init(env, osd);
7376
7377         RETURN(result);
7378 }
7379
7380 static int osd_fid_alloc(const struct lu_env *env, struct obd_export *exp,
7381                          struct lu_fid *fid, struct md_op_data *op_data)
7382 {
7383         struct osd_device *osd = osd_dev(exp->exp_obd->obd_lu_dev);
7384
7385         return seq_client_alloc_fid(env, osd->od_cl_seq, fid);
7386 }
7387
7388 static const struct lu_object_operations osd_lu_obj_ops = {
7389         .loo_object_init      = osd_object_init,
7390         .loo_object_delete    = osd_object_delete,
7391         .loo_object_release   = osd_object_release,
7392         .loo_object_free      = osd_object_free,
7393         .loo_object_print     = osd_object_print,
7394         .loo_object_invariant = osd_object_invariant
7395 };
7396
7397 const struct lu_device_operations osd_lu_ops = {
7398         .ldo_object_alloc      = osd_object_alloc,
7399         .ldo_process_config    = osd_process_config,
7400         .ldo_recovery_complete = osd_recovery_complete,
7401         .ldo_prepare           = osd_prepare,
7402 };
7403
7404 static const struct lu_device_type_operations osd_device_type_ops = {
7405         .ldto_init = osd_type_init,
7406         .ldto_fini = osd_type_fini,
7407
7408         .ldto_start = osd_type_start,
7409         .ldto_stop  = osd_type_stop,
7410
7411         .ldto_device_alloc = osd_device_alloc,
7412         .ldto_device_free  = osd_device_free,
7413
7414         .ldto_device_init    = osd_device_init,
7415         .ldto_device_fini    = osd_device_fini
7416 };
7417
7418 static struct lu_device_type osd_device_type = {
7419         .ldt_tags     = LU_DEVICE_DT,
7420         .ldt_name     = LUSTRE_OSD_LDISKFS_NAME,
7421         .ldt_ops      = &osd_device_type_ops,
7422         .ldt_ctx_tags = LCT_LOCAL,
7423 };
7424
7425 static int osd_health_check(const struct lu_env *env, struct obd_device *obd)
7426 {
7427         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
7428         struct super_block *sb = osd_sb(osd);
7429
7430         return (osd->od_mnt == NULL || sb->s_flags & MS_RDONLY);
7431 }
7432
7433 /*
7434  * lprocfs legacy support.
7435  */
7436 static struct obd_ops osd_obd_device_ops = {
7437         .o_owner = THIS_MODULE,
7438         .o_connect      = osd_obd_connect,
7439         .o_disconnect   = osd_obd_disconnect,
7440         .o_fid_alloc    = osd_fid_alloc,
7441         .o_health_check = osd_health_check,
7442 };
7443
7444 static int __init osd_init(void)
7445 {
7446         int rc;
7447
7448         LASSERT(BH_DXLock < sizeof(((struct buffer_head *)0)->b_state) * 8);
7449 #if !defined(CONFIG_DEBUG_MUTEXES) && !defined(CONFIG_DEBUG_SPINLOCK)
7450         /* please, try to keep osd_thread_info smaller than a page */
7451         CLASSERT(sizeof(struct osd_thread_info) <= PAGE_SIZE);
7452 #endif
7453
7454         osd_oi_mod_init();
7455
7456         rc = lu_kmem_init(ldiskfs_caches);
7457         if (rc)
7458                 return rc;
7459
7460 #ifdef CONFIG_KALLSYMS
7461         priv_dev_set_rdonly = (void *)kallsyms_lookup_name("dev_set_rdonly");
7462         priv_dev_check_rdonly = (void *)kallsyms_lookup_name("dev_check_rdonly");
7463         /* Clear readonly is unused at this time */
7464         /*priv_dev_clear_rdonly = (void *)kallsyms_lookup_name("dev_clear_rdonly");*/
7465 #endif
7466
7467         rc = class_register_type(&osd_obd_device_ops, NULL, true,
7468                                  lprocfs_osd_module_vars,
7469                                  LUSTRE_OSD_LDISKFS_NAME, &osd_device_type);
7470         if (rc)
7471                 lu_kmem_fini(ldiskfs_caches);
7472         return rc;
7473 }
7474
7475 static void __exit osd_exit(void)
7476 {
7477         class_unregister_type(LUSTRE_OSD_LDISKFS_NAME);
7478         lu_kmem_fini(ldiskfs_caches);
7479 }
7480
7481 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
7482 MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_LDISKFS_NAME")");
7483 MODULE_VERSION(LUSTRE_VERSION_STRING);
7484 MODULE_LICENSE("GPL");
7485
7486 module_init(osd_init);
7487 module_exit(osd_exit);