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, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  *
  31  * lustre/osd/osd_handler.c
  32  *
  33  * Top-level entry points into osd module
  34  *
  35  * Author: Nikita Danilov <nikita@clusterfs.com>
  36  *         Pravin Shelar <pravin.shelar@sun.com> : Added fid in dirent
  37  */
  38
  39 #define DEBUG_SUBSYSTEM S_OSD
  40
  41 #include <linux/fs_struct.h>
  42 #include <linux/module.h>
  43 #include <linux/user_namespace.h>
  44 #include <linux/uidgid.h>
  45 #ifdef HAVE_INODE_IVERSION
  46 #include <linux/iversion.h>
  47 #else
  48 #define inode_peek_iversion(__inode)    ((__inode)->i_version)
  49 #endif
  50
  51 /* prerequisite for linux/xattr.h */
  52 #include <linux/types.h>
  53 /* prerequisite for linux/xattr.h */
  54 #include <linux/fs.h>
  55 /* XATTR_{REPLACE,CREATE} */
  56 #include <linux/xattr.h>
  57
  58 #include <ldiskfs/ldiskfs.h>
  59 #include <ldiskfs/xattr.h>
  60 #include <ldiskfs/ldiskfs_extents.h>
  61 #undef ENTRY
  62 /*
  63  * struct OBD_{ALLOC,FREE}*()
  64  */
  65 #include <obd_support.h>
  66 #include <libcfs/libcfs.h>
  67 /* struct ptlrpc_thread */
  68 #include <lustre_net.h>
  69 #include <lustre_fid.h>
  70 /* process_config */
  71 #include <uapi/linux/lustre/lustre_param.h>
  72 #include <uapi/linux/lustre/lustre_disk.h>
  73
  74 #include "osd_internal.h"
  75 #include "osd_dynlocks.h"
  76
  77 /* llo_* api support */
  78 #include <md_object.h>
  79 #include <lustre_quota.h>
  80
  81 #include <lustre_linkea.h>
  82
  83 /* encoding routines */
  84 #include <lustre_crypto.h>
  85
  86 /* Maximum EA size is limited by LNET_MTU for remote objects */
  87 #define OSD_MAX_EA_SIZE 1048364
  88
  89 int ldiskfs_pdo = 1;
  90 module_param(ldiskfs_pdo, int, 0644);
  91 MODULE_PARM_DESC(ldiskfs_pdo, "ldiskfs with parallel directory operations");
  92
  93 int ldiskfs_track_declares_assert;
  94 module_param(ldiskfs_track_declares_assert, int, 0644);
  95 MODULE_PARM_DESC(ldiskfs_track_declares_assert, "LBUG during tracking of declares");
  96
  97 /* 1 GiB in 512-byte sectors */
  98 int ldiskfs_delayed_unlink_blocks = (1 << (30 - 9));
  99
 100 /* Slab to allocate dynlocks */
 101 struct kmem_cache *dynlock_cachep;
 102
 103 /* Slab to allocate osd_it_ea */
 104 struct kmem_cache *osd_itea_cachep;
 105
 106 static struct lu_kmem_descr ldiskfs_caches[] = {
 107         {
 108                 .ckd_cache = &biop_cachep,
 109                 .ckd_name  = "biop_cache",
 110                 .ckd_size  = sizeof(struct osd_bio_private)
 111         },
 112         {
 113                 .ckd_cache = &dynlock_cachep,
 114                 .ckd_name  = "dynlock_cache",
 115                 .ckd_size  = sizeof(struct dynlock_handle)
 116         },
 117         {
 118                 .ckd_cache = &osd_itea_cachep,
 119                 .ckd_name  = "osd_itea_cache",
 120                 .ckd_size  = sizeof(struct osd_it_ea)
 121         },
 122         {
 123                 .ckd_cache = NULL
 124         }
 125 };
 126
 127 static atomic_t osd_mount_seq;
 128
 129 static const char dot[] = ".";
 130 static const char dotdot[] = "..";
 131
 132 static const struct lu_object_operations      osd_lu_obj_ops;
 133 static const struct dt_object_operations      osd_obj_ops;
 134 static const struct dt_object_operations      osd_obj_otable_it_ops;
 135 static const struct dt_index_operations       osd_index_iam_ops;
 136 static const struct dt_index_operations       osd_index_ea_ops;
 137
 138 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
 139                           const struct lu_fid *fid);
 140 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
 141                                                 struct osd_device *osd);
 142 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
 143                          const struct lu_buf *buf, const char *name, int fl,
 144                          struct thandle *handle);
 145
 146 int osd_trans_declare_op2rb[] = {
 147         [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
 148         [OSD_OT_PUNCH]          = OSD_OT_MAX,
 149         [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
 150         [OSD_OT_CREATE]         = OSD_OT_DESTROY,
 151         [OSD_OT_DESTROY]        = OSD_OT_CREATE,
 152         [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
 153         [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
 154         [OSD_OT_WRITE]          = OSD_OT_WRITE,
 155         [OSD_OT_INSERT]         = OSD_OT_DELETE,
 156         [OSD_OT_DELETE]         = OSD_OT_INSERT,
 157         [OSD_OT_QUOTA]          = OSD_OT_MAX,
 158 };
 159
 160 static int osd_has_index(const struct osd_object *obj)
 161 {
 162         return obj->oo_dt.do_index_ops != NULL;
 163 }
 164
 165 static int osd_object_invariant(const struct lu_object *l)
 166 {
 167         return osd_invariant(osd_obj(l));
 168 }
 169
 170 /*
 171  * Concurrency: doesn't matter
 172  */
 173 static int osd_is_write_locked(const struct lu_env *env, struct osd_object *o)
 174 {
 175         struct osd_thread_info *oti = osd_oti_get(env);
 176
 177         return oti->oti_w_locks > 0 && o->oo_owner == env;
 178 }
 179
 180 /*
 181  * Concurrency: doesn't access mutable data
 182  */
 183 static int osd_root_get(const struct lu_env *env,
 184                         struct dt_device *dev, struct lu_fid *f)
 185 {
 186         lu_local_obj_fid(f, OSD_FS_ROOT_OID);
 187         return 0;
 188 }
 189
 190 /*
 191  * the following set of functions are used to maintain per-thread
 192  * cache of FID->ino mapping. this mechanism is needed to resolve
 193  * FID to inode at dt_insert() which in turn stores ino in the
 194  * directory entries to keep ldiskfs compatible with ext[34].
 195  * due to locking-originated restrictions we can't lookup ino
 196  * using LU cache (deadlock is possible). lookup using OI is quite
 197  * expensive. so instead we maintain this cache and methods like
 198  * dt_create() fill it. so in the majority of cases dt_insert() is
 199  * able to find needed mapping in lockless manner.
 200  */
 201 static struct osd_idmap_cache *
 202 osd_idc_find(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 = oti->oti_ins_cache;
 207         int i;
 208
 209         for (i = 0; i < oti->oti_ins_cache_used; i++) {
 210                 if (!lu_fid_eq(&idc[i].oic_fid, fid))
 211                         continue;
 212                 if (idc[i].oic_dev != osd)
 213                         continue;
 214
 215                 return idc + i;
 216         }
 217
 218         return NULL;
 219 }
 220
 221 static struct osd_idmap_cache *
 222 osd_idc_add(const struct lu_env *env, struct osd_device *osd,
 223             const struct lu_fid *fid)
 224 {
 225         struct osd_thread_info *oti   = osd_oti_get(env);
 226         struct osd_idmap_cache *idc;
 227         int i;
 228
 229         if (unlikely(oti->oti_ins_cache_used >= oti->oti_ins_cache_size)) {
 230                 i = oti->oti_ins_cache_size * 2;
 231                 if (i == 0)
 232                         i = OSD_INS_CACHE_SIZE;
 233                 OBD_ALLOC_PTR_ARRAY_LARGE(idc, i);
 234                 if (idc == NULL)
 235                         return ERR_PTR(-ENOMEM);
 236                 if (oti->oti_ins_cache != NULL) {
 237                         memcpy(idc, oti->oti_ins_cache,
 238                                oti->oti_ins_cache_used * sizeof(*idc));
 239                         OBD_FREE_PTR_ARRAY_LARGE(oti->oti_ins_cache,
 240                                            oti->oti_ins_cache_used);
 241                 }
 242                 oti->oti_ins_cache = idc;
 243                 oti->oti_ins_cache_size = i;
 244         }
 245
 246         idc = oti->oti_ins_cache + oti->oti_ins_cache_used++;
 247         idc->oic_fid = *fid;
 248         idc->oic_dev = osd;
 249         idc->oic_lid.oii_ino = 0;
 250         idc->oic_lid.oii_gen = 0;
 251         idc->oic_remote = 0;
 252
 253         return idc;
 254 }
 255
 256 /*
 257  * lookup mapping for the given fid in the cache, initialize a
 258  * new one if not found. the initialization checks whether the
 259  * object is local or remote. for local objects, OI is used to
 260  * learn ino/generation. the function is used when the caller
 261  * has no information about the object, e.g. at dt_insert().
 262  */
 263 static struct osd_idmap_cache *
 264 osd_idc_find_or_init(const struct lu_env *env, struct osd_device *osd,
 265                      const struct lu_fid *fid)
 266 {
 267         struct osd_idmap_cache *idc;
 268         int rc;
 269
 270         idc = osd_idc_find(env, osd, fid);
 271         LASSERT(!IS_ERR(idc));
 272         if (idc != NULL)
 273                 return idc;
 274
 275         CDEBUG(D_INODE, "%s: FID "DFID" not in the id map cache\n",
 276                osd->od_svname, PFID(fid));
 277
 278         /* new mapping is needed */
 279         idc = osd_idc_add(env, osd, fid);
 280         if (IS_ERR(idc)) {
 281                 CERROR("%s: FID "DFID" add id map cache failed: %ld\n",
 282                        osd->od_svname, PFID(fid), PTR_ERR(idc));
 283                 return idc;
 284         }
 285
 286         /* initialize it */
 287         rc = osd_remote_fid(env, osd, fid);
 288         if (unlikely(rc < 0))
 289                 return ERR_PTR(rc);
 290
 291         if (rc == 0) {
 292                 /* the object is local, lookup in OI */
 293                 /* XXX: probably cheaper to lookup in LU first? */
 294                 rc = osd_oi_lookup(osd_oti_get(env), osd, fid,
 295                                    &idc->oic_lid, 0);
 296                 if (unlikely(rc < 0)) {
 297                         CERROR("can't lookup: rc = %d\n", rc);
 298                         return ERR_PTR(rc);
 299                 }
 300         } else {
 301                 /* the object is remote */
 302                 idc->oic_remote = 1;
 303         }
 304
 305         return idc;
 306 }
 307
 308 static void osd_idc_dump_lma(const struct lu_env *env,
 309                                 struct osd_device *osd,
 310                                 unsigned long ino,
 311                                 bool check_in_oi)
 312 {
 313         struct osd_thread_info *info = osd_oti_get(env);
 314         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 315         const struct lu_fid *fid;
 316         struct osd_inode_id lid;
 317         struct inode *inode;
 318         int rc;
 319
 320         inode = osd_ldiskfs_iget(osd_sb(osd), ino);
 321         if (IS_ERR(inode)) {
 322                 CERROR("%s: can't get inode %lu: rc = %d\n",
 323                        osd->od_svname, ino, (int)PTR_ERR(inode));
 324                 return;
 325         }
 326         if (is_bad_inode(inode)) {
 327                 CERROR("%s: bad inode %lu\n", osd->od_svname, ino);
 328                 goto put;
 329         }
 330         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
 331         if (rc) {
 332                 CERROR("%s: can't get LMA for %lu: rc = %d\n",
 333                        osd->od_svname, ino, rc);
 334                 goto put;
 335         }
 336         fid = &loa->loa_lma.lma_self_fid;
 337         LCONSOLE(D_INFO, "%s: "DFID" in inode %lu/%u\n", osd->od_svname,
 338                       PFID(fid), ino, (unsigned)inode->i_generation);
 339         if (!check_in_oi)
 340                 goto put;
 341         rc = osd_oi_lookup(osd_oti_get(env), osd, fid, &lid, 0);
 342         if (rc) {
 343                 CERROR("%s: can't lookup "DFID": rc = %d\n",
 344                        osd->od_svname, PFID(fid), rc);
 345                 goto put;
 346         }
 347         LCONSOLE(D_INFO, "%s: "DFID" maps to %u/%u\n", osd->od_svname,
 348                       PFID(fid), lid.oii_ino, lid.oii_gen);
 349 put:
 350         iput(inode);
 351 }
 352
 353 static void osd_idc_dump_debug(const struct lu_env *env,
 354                                 struct osd_device *osd,
 355                                 const struct lu_fid *fid,
 356                                 unsigned long ino1,
 357                                 unsigned long ino2)
 358 {
 359         struct osd_inode_id lid;
 360
 361         int rc;
 362
 363         rc = osd_oi_lookup(osd_oti_get(env), osd, fid, &lid, 0);
 364         if (!rc) {
 365                 LCONSOLE(D_INFO, "%s: "DFID" maps to %u/%u\n",
 366                         osd->od_svname, PFID(fid), lid.oii_ino, lid.oii_gen);
 367                 osd_idc_dump_lma(env, osd, lid.oii_ino, false);
 368         } else {
 369                 CERROR("%s: can't lookup "DFID": rc = %d\n",
 370                        osd->od_svname, PFID(fid), rc);
 371         }
 372         if (ino1)
 373                 osd_idc_dump_lma(env, osd, ino1, true);
 374         if (ino2)
 375                 osd_idc_dump_lma(env, osd, ino2, true);
 376 }
 377
 378 /*
 379  * lookup mapping for given FID and fill it from the given object.
 380  * the object is lolcal by definition.
 381  */
 382 static int osd_idc_find_and_init(const struct lu_env *env,
 383                                  struct osd_device *osd,
 384                                  struct osd_object *obj)
 385 {
 386         const struct lu_fid *fid = lu_object_fid(&obj->oo_dt.do_lu);
 387         struct osd_idmap_cache *idc;
 388
 389         idc = osd_idc_find(env, osd, fid);
 390         LASSERT(!IS_ERR(idc));
 391         if (idc != NULL) {
 392                 if (obj->oo_inode == NULL)
 393                         return 0;
 394                 if (idc->oic_lid.oii_ino != obj->oo_inode->i_ino) {
 395                         if (idc->oic_lid.oii_ino) {
 396                                 osd_idc_dump_debug(env, osd, fid,
 397                                                    idc->oic_lid.oii_ino,
 398                                                    obj->oo_inode->i_ino);
 399                                 return -EINVAL;
 400                         }
 401                         idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
 402                         idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
 403                 }
 404                 return 0;
 405         }
 406
 407         CDEBUG(D_INODE, "%s: FID "DFID" not in the id map cache\n",
 408                osd->od_svname, PFID(fid));
 409
 410         /* new mapping is needed */
 411         idc = osd_idc_add(env, osd, fid);
 412         if (IS_ERR(idc)) {
 413                 CERROR("%s: FID "DFID" add id map cache failed: %ld\n",
 414                        osd->od_svname, PFID(fid), PTR_ERR(idc));
 415                 return PTR_ERR(idc);
 416         }
 417
 418         if (obj->oo_inode != NULL) {
 419                 idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
 420                 idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
 421         }
 422         return 0;
 423 }
 424
 425 /*
 426  * OSD object methods.
 427  */
 428
 429 /*
 430  * Concurrency: no concurrent access is possible that early in object
 431  * life-cycle.
 432  */
 433 static struct lu_object *osd_object_alloc(const struct lu_env *env,
 434                                           const struct lu_object_header *hdr,
 435                                           struct lu_device *d)
 436 {
 437         struct osd_object *mo;
 438
 439         OBD_ALLOC_PTR(mo);
 440         if (mo != NULL) {
 441                 struct lu_object *l;
 442                 struct lu_object_header *h;
 443                 struct osd_device *o = osd_dev(d);
 444
 445                 l = &mo->oo_dt.do_lu;
 446                 if (unlikely(o->od_in_init)) {
 447                         OBD_ALLOC_PTR(h);
 448                         if (!h) {
 449                                 OBD_FREE_PTR(mo);
 450                                 return NULL;
 451                         }
 452
 453                         lu_object_header_init(h);
 454                         lu_object_init(l, h, d);
 455                         lu_object_add_top(h, l);
 456                         mo->oo_header = h;
 457                 } else {
 458                         dt_object_init(&mo->oo_dt, NULL, d);
 459                         mo->oo_header = NULL;
 460                 }
 461
 462                 mo->oo_dt.do_ops = &osd_obj_ops;
 463                 l->lo_ops = &osd_lu_obj_ops;
 464                 init_rwsem(&mo->oo_sem);
 465                 init_rwsem(&mo->oo_ext_idx_sem);
 466                 spin_lock_init(&mo->oo_guard);
 467                 INIT_LIST_HEAD(&mo->oo_xattr_list);
 468                 return l;
 469         }
 470         return NULL;
 471 }
 472
 473 int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
 474                 struct dentry *dentry, struct lustre_ost_attrs *loa)
 475 {
 476         int rc;
 477
 478         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 479                              (void *)loa, sizeof(*loa));
 480         if (rc > 0) {
 481                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
 482
 483                 if (rc < sizeof(*lma))
 484                         return -EINVAL;
 485
 486                 rc = 0;
 487                 lustre_loa_swab(loa, true);
 488                 /* Check LMA compatibility */
 489                 if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
 490                         rc = -EOPNOTSUPP;
 491                         CWARN("%s: unsupported incompat LMA feature(s) %#x for fid = "DFID", ino = %lu: rc = %d\n",
 492                               osd_ino2name(inode),
 493                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 494                               PFID(&lma->lma_self_fid), inode->i_ino, rc);
 495                 }
 496         } else if (rc == 0) {
 497                 rc = -ENODATA;
 498         }
 499
 500         return rc;
 501 }
 502
 503 /*
 504  * retrieve object from backend ext fs.
 505  **/
 506 static struct inode *osd_iget2(struct osd_thread_info *info,
 507                                struct osd_device *dev, struct osd_inode_id *id,
 508                                int *err)
 509 {
 510         int rc = 0;
 511         struct inode *inode = NULL;
 512
 513         /*
 514          * if we look for an inode withing a running
 515          * transaction, then we risk to deadlock
 516          * osd_dirent_check_repair() breaks this
 517          */
 518          /* LASSERT(current->journal_info == NULL); */
 519
 520         inode = osd_ldiskfs_iget(osd_sb(dev), id->oii_ino);
 521         if (IS_ERR(inode)) {
 522                 CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
 523                        id->oii_ino, PTR_ERR(inode));
 524         } else if (id->oii_gen != OSD_OII_NOGEN &&
 525                    inode->i_generation != id->oii_gen) {
 526                 CDEBUG(D_INODE, "unmatched inode: ino = %u, oii_gen = %u, "
 527                        "i_generation = %u\n",
 528                        id->oii_ino, id->oii_gen, inode->i_generation);
 529                 rc = -ESTALE;
 530         } else if (inode->i_nlink == 0) {
 531                 /*
 532                  * due to parallel readdir and unlink,
 533                  * we can have dead inode here.
 534                  */
 535                 CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
 536                 rc = -ESTALE;
 537         } else if (is_bad_inode(inode)) {
 538                 CWARN("%s: bad inode: ino = %u: rc = %d\n",
 539                       osd_dev2name(dev), id->oii_ino, -ENOENT);
 540                 rc = -ENOENT;
 541         } else  if (osd_is_ea_inode(inode)) {
 542                 /*
 543                  * EA inode is internal ldiskfs object, should don't visible
 544                  * on osd
 545                  */
 546                 CDEBUG(D_INODE, "EA inode: ino = %u\n", id->oii_ino);
 547                 rc = -ENOENT;
 548         } else if ((rc = osd_attach_jinode(inode))) {
 549                 CDEBUG(D_INODE, "jbd: ino = %u rc = %d\n", id->oii_ino, rc);
 550         } else {
 551                 ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
 552                 if (id->oii_gen == OSD_OII_NOGEN)
 553                         osd_id_gen(id, inode->i_ino, inode->i_generation);
 554
 555                 /*
 556                  * Do not update file c/mtime in ldiskfs.
 557                  * NB: we don't have any lock to protect this because we don't
 558                  * have reference on osd_object now, but contention with
 559                  * another lookup + attr_set can't happen in the tiny window
 560                  * between if (...) and set S_NOCMTIME.
 561                  */
 562                 if (!(inode->i_flags & S_NOCMTIME))
 563                         inode->i_flags |= S_NOCMTIME;
 564         }
 565
 566         *err = rc;
 567
 568         return inode;
 569 }
 570
 571 struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
 572                        struct osd_inode_id *id)
 573 {
 574         struct inode *inode;
 575         int rc = 0;
 576
 577         inode = osd_iget2(info, dev, id, &rc);
 578
 579         if (rc) {
 580                 iput(inode);
 581                 inode = ERR_PTR(rc);
 582         }
 583
 584         return inode;
 585 }
 586
 587 int osd_ldiskfs_add_entry(struct osd_thread_info *info, struct osd_device *osd,
 588                           handle_t *handle, struct dentry *child,
 589                           struct inode *inode, struct htree_lock *hlock)
 590 {
 591         int rc, rc2;
 592
 593         rc = __ldiskfs_add_entry(handle, child, inode, hlock);
 594         if (rc == -ENOBUFS || rc == -ENOSPC) {
 595                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 596                 struct inode *parent = child->d_parent->d_inode;
 597                 struct lu_fid *fid = NULL;
 598                 char fidstr[FID_LEN + 1] = "unknown";
 599
 600                 rc2 = osd_get_lma(info, parent, child->d_parent, loa);
 601                 if (!rc2) {
 602                         fid = &loa->loa_lma.lma_self_fid;
 603                 } else if (rc2 == -ENODATA) {
 604                         if (unlikely(is_root_inode(parent))) {
 605                                 fid = &info->oti_fid3;
 606                                 lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
 607                         } else if (!osd->od_is_ost && osd->od_index == 0) {
 608                                 fid = &info->oti_fid3;
 609                                 lu_igif_build(fid, parent->i_ino,
 610                                               parent->i_generation);
 611                         }
 612                 }
 613
 614                 if (fid != NULL)
 615                         snprintf(fidstr, sizeof(fidstr), DFID, PFID(fid));
 616
 617                 /* below message is checked in sanity.sh test_129 */
 618                 if (rc == -ENOSPC) {
 619                         CWARN("%s: directory (inode: %lu, FID: %s) has reached max size limit\n",
 620                               osd_name(osd), parent->i_ino, fidstr);
 621                 } else {
 622                         rc = 0; /* ignore such error now */
 623                         CWARN("%s: directory (inode: %lu, FID: %s) is approaching max size limit\n",
 624                               osd_name(osd), parent->i_ino, fidstr);
 625                 }
 626
 627         }
 628
 629         return rc;
 630 }
 631
 632
 633 struct inode *
 634 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
 635              struct osd_inode_id *id, struct lu_fid *fid)
 636 {
 637         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 638         struct inode *inode;
 639         int rc;
 640
 641         inode = osd_iget(info, dev, id);
 642         if (IS_ERR(inode))
 643                 return inode;
 644
 645         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
 646         if (!rc) {
 647                 *fid = loa->loa_lma.lma_self_fid;
 648         } else if (rc == -ENODATA) {
 649                 if (unlikely(is_root_inode(inode)))
 650                         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
 651                 else
 652                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 653         } else {
 654                 iput(inode);
 655                 inode = ERR_PTR(rc);
 656         }
 657         return inode;
 658 }
 659
 660 static struct inode *osd_iget_check(struct osd_thread_info *info,
 661                                     struct osd_device *dev,
 662                                     const struct lu_fid *fid,
 663                                     struct osd_inode_id *id,
 664                                     bool trusted)
 665 {
 666         struct inode *inode;
 667         int rc = 0;
 668
 669         ENTRY;
 670
 671         /*
 672          * The cached OI mapping is trustable. If we cannot locate the inode
 673          * via the cached OI mapping, then return the failure to the caller
 674          * directly without further OI checking.
 675          */
 676
 677 again:
 678         inode = osd_iget2(info, dev, id, &rc);
 679         if (rc) {
 680                 if (!trusted && (rc == -ENOENT || rc == -ESTALE))
 681                         goto check_oi;
 682
 683                 CDEBUG(D_INODE, "no inode for FID: "DFID", ino = %u, rc = %d\n",
 684                        PFID(fid), id->oii_ino, rc);
 685                 GOTO(put, rc);
 686         }
 687
 688 check_oi:
 689         if (rc != 0) {
 690                 __u32 saved_ino = id->oii_ino;
 691                 __u32 saved_gen = id->oii_gen;
 692
 693                 LASSERT(!trusted);
 694                 LASSERTF(rc == -ESTALE || rc == -ENOENT, "rc = %d\n", rc);
 695
 696                 rc = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
 697                 /*
 698                  * XXX: There are four possible cases:
 699                  *      1. rc = 0.
 700                  *         Backup/restore caused the OI invalid.
 701                  *      2. rc = 0.
 702                  *         Someone unlinked the object but NOT removed
 703                  *         the OI mapping, such as mount target device
 704                  *         as ldiskfs, and modify something directly.
 705                  *      3. rc = -ENOENT.
 706                  *         Someone just removed the object between the
 707                  *         former oi_lookup and the iget. It is normal.
 708                  *      4. Other failure cases.
 709                  *
 710                  *      Generally, when the device is mounted, it will
 711                  *      auto check whether the system is restored from
 712                  *      file-level backup or not. We trust such detect
 713                  *      to distinguish the 1st case from the 2nd case:
 714                  *      if the OI files are consistent but may contain
 715                  *      stale OI mappings because of case 2, if iget()
 716                  *      returns -ENOENT or -ESTALE, then it should be
 717                  *      the case 2.
 718                  */
 719                 if (rc != 0)
 720                         /*
 721                          * If the OI mapping was in OI file before the
 722                          * osd_iget_check(), but now, it is disappear,
 723                          * then it must be removed by race. That is a
 724                          * normal race case.
 725                          */
 726                         GOTO(put, rc);
 727
 728                 /*
 729                  * It is the OI scrub updated the OI mapping by race.
 730                  * The new OI mapping must be valid.
 731                  */
 732                 if (saved_ino != id->oii_ino ||
 733                     (saved_gen != id->oii_gen && saved_gen != OSD_OII_NOGEN)) {
 734                         if (!IS_ERR(inode))
 735                                 iput(inode);
 736
 737                         trusted = true;
 738                         goto again;
 739                 }
 740
 741                 if (IS_ERR(inode)) {
 742                         if (dev->od_scrub.os_scrub.os_file.sf_flags &
 743                             SF_INCONSISTENT)
 744                                 /*
 745                                  * It still can be the case 2, but we cannot
 746                                  * distinguish it from the case 1. So return
 747                                  * -EREMCHG to block current operation until
 748                                  *  OI scrub rebuilt the OI mappings.
 749                                  */
 750                                 rc = -EREMCHG;
 751                         else
 752                                 rc = -ENOENT;
 753
 754                         GOTO(put, rc);
 755                 }
 756
 757                 if (inode->i_generation == id->oii_gen)
 758                         rc = -ENOENT;
 759                 else
 760                         rc = -EREMCHG;
 761         }
 762
 763         GOTO(put, rc);
 764
 765 put:
 766         if (rc != 0) {
 767                 if (!IS_ERR(inode))
 768                         iput(inode);
 769
 770                 inode = ERR_PTR(rc);
 771         }
 772
 773         return inode;
 774 }
 775
 776 /**
 777  * \retval +v: new filter_fid does not contain self-fid
 778  * \retval 0:  filter_fid_18_23, contains self-fid
 779  * \retval -v: other failure cases
 780  */
 781 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
 782                  struct dentry *dentry, struct lu_fid *fid)
 783 {
 784         struct filter_fid *ff = &info->oti_ff;
 785         struct ost_id *ostid = &info->oti_ostid;
 786         int rc;
 787
 788         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
 789         if (rc == sizeof(struct filter_fid_18_23)) {
 790                 struct filter_fid_18_23 *ff_old = (void *)ff;
 791
 792                 ostid_set_seq(ostid, le64_to_cpu(ff_old->ff_seq));
 793                 rc = ostid_set_id(ostid, le64_to_cpu(ff_old->ff_objid));
 794                 /*
 795                  * XXX: use 0 as the index for compatibility, the caller will
 796                  * handle index related issues when necessary.
 797                  */
 798                 if (!rc)
 799                         ostid_to_fid(fid, ostid, 0);
 800         } else if (rc >= (int)sizeof(struct filter_fid_24_29)) {
 801                 rc = 1;
 802         } else if (rc >= 0) {
 803                 rc = -EINVAL;
 804         }
 805
 806         return rc;
 807 }
 808
 809 static int osd_lma_self_repair(struct osd_thread_info *info,
 810                                struct osd_device *osd, struct inode *inode,
 811                                const struct lu_fid *fid, __u32 compat)
 812 {
 813         handle_t *jh;
 814         int rc;
 815
 816         LASSERT(current->journal_info == NULL);
 817
 818         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
 819                                   osd_dto_credits_noquota[DTO_XATTR_SET]);
 820         if (IS_ERR(jh)) {
 821                 rc = PTR_ERR(jh);
 822                 CWARN("%s: cannot start journal for lma_self_repair: rc = %d\n",
 823                       osd_name(osd), rc);
 824                 return rc;
 825         }
 826
 827         rc = osd_ea_fid_set(info, inode, fid, compat, 0);
 828         if (rc != 0)
 829                 CWARN("%s: cannot self repair the LMA: rc = %d\n",
 830                       osd_name(osd), rc);
 831         ldiskfs_journal_stop(jh);
 832         return rc;
 833 }
 834
 835 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
 836 {
 837         struct osd_thread_info *info = osd_oti_get(env);
 838         struct osd_device *osd = osd_obj2dev(obj);
 839         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 840         struct lustre_mdt_attrs *lma = &loa->loa_lma;
 841         struct inode *inode = obj->oo_inode;
 842         struct dentry *dentry = &info->oti_obj_dentry;
 843         struct lu_fid *fid = NULL;
 844         const struct lu_fid *rfid = lu_object_fid(&obj->oo_dt.do_lu);
 845         int rc;
 846
 847         ENTRY;
 848
 849         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 850                              (void *)loa, sizeof(*loa));
 851         if (rc == -ENODATA && !fid_is_igif(rfid) && osd->od_check_ff) {
 852                 fid = &lma->lma_self_fid;
 853                 rc = osd_get_idif(info, inode, dentry, fid);
 854                 if (rc > 0 || (rc == -ENODATA && osd->od_index_in_idif)) {
 855                         /*
 856                          * For the given OST-object, if it has neither LMA nor
 857                          * FID in XATTR_NAME_FID, then the given FID (which is
 858                          * contained in the @obj, from client RPC for locating
 859                          * the OST-object) is trusted. We use it to generate
 860                          * the LMA.
 861                          */
 862                         osd_lma_self_repair(info, osd, inode, rfid,
 863                                             LMAC_FID_ON_OST);
 864                         RETURN(0);
 865                 }
 866         }
 867
 868         if (rc < 0)
 869                 RETURN(rc);
 870
 871         if (rc > 0) {
 872                 rc = 0;
 873                 lustre_lma_swab(lma);
 874                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
 875                              (CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT) &&
 876                               S_ISREG(inode->i_mode)))) {
 877                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
 878                               "fid = "DFID", ino = %lu\n", osd_name(osd),
 879                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 880                               PFID(rfid), inode->i_ino);
 881                         rc = -EOPNOTSUPP;
 882                 } else {
 883                         fid = &lma->lma_self_fid;
 884                         if (lma->lma_compat & LMAC_STRIPE_INFO &&
 885                             osd->od_is_ost)
 886                                 obj->oo_pfid_in_lma = 1;
 887                         if (unlikely(lma->lma_incompat & LMAI_REMOTE_PARENT) &&
 888                             !osd->od_is_ost)
 889                                 lu_object_set_agent_entry(&obj->oo_dt.do_lu);
 890                 }
 891         }
 892
 893         if (fid != NULL && unlikely(!lu_fid_eq(rfid, fid))) {
 894                 if (fid_is_idif(rfid) && fid_is_idif(fid)) {
 895                         struct ost_id   *oi   = &info->oti_ostid;
 896                         struct lu_fid   *fid1 = &info->oti_fid3;
 897                         __u32            idx  = fid_idif_ost_idx(rfid);
 898
 899                         /*
 900                          * For old IDIF, the OST index is not part of the IDIF,
 901                          * Means that different OSTs may have the same IDIFs.
 902                          * Under such case, we need to make some compatible
 903                          * check to make sure to trigger OI scrub properly.
 904                          */
 905                         if (idx != 0 && fid_idif_ost_idx(fid) == 0) {
 906                                 /* Given @rfid is new, LMA is old. */
 907                                 fid_to_ostid(fid, oi);
 908                                 ostid_to_fid(fid1, oi, idx);
 909                                 if (lu_fid_eq(fid1, rfid)) {
 910                                         if (osd->od_index_in_idif)
 911                                                 osd_lma_self_repair(info, osd,
 912                                                         inode, rfid,
 913                                                         LMAC_FID_ON_OST);
 914                                         RETURN(0);
 915                                 }
 916                         }
 917                 }
 918
 919                 rc = -EREMCHG;
 920         }
 921
 922         RETURN(rc);
 923 }
 924
 925 struct osd_check_lmv_buf {
 926         /* please keep it as first member */
 927         struct dir_context ctx;
 928         struct osd_thread_info *oclb_info;
 929         struct osd_device *oclb_dev;
 930         int oclb_items;
 931         bool oclb_found;
 932 };
 933
 934 /**
 935  * It is called internally by ->iterate*() to filter out the
 936  * local slave object's FID of the striped directory.
 937  *
 938  * \retval      1 found the local slave's FID
 939  * \retval      0 continue to check next item
 940  * \retval      -ve for failure
 941  */
 942 #ifdef HAVE_FILLDIR_USE_CTX
 943 static FILLDIR_TYPE do_osd_stripe_dir_filldir(struct dir_context *buf,
 944 #else
 945 static int osd_stripe_dir_filldir(void *buf,
 946 #endif
 947                                   const char *name, int namelen,
 948                                   loff_t offset, __u64 ino, unsigned int d_type)
 949 {
 950         struct osd_check_lmv_buf *oclb = (struct osd_check_lmv_buf *)buf;
 951         struct osd_thread_info *oti = oclb->oclb_info;
 952         struct lu_fid *fid = &oti->oti_fid3;
 953         struct osd_inode_id *id = &oti->oti_id3;
 954         struct osd_inode_id id2;
 955         struct osd_device *dev = oclb->oclb_dev;
 956         struct inode *inode;
 957
 958         oclb->oclb_items++;
 959
 960         if (name[0] == '.')
 961                 return 0;
 962
 963         fid_zero(fid);
 964         sscanf(name + 1, SFID, RFID(fid));
 965         if (!fid_is_sane(fid))
 966                 return 0;
 967
 968         if (osd_remote_fid(oti->oti_env, dev, fid))
 969                 return 0;
 970
 971         osd_id_gen(id, ino, OSD_OII_NOGEN);
 972         inode = osd_iget(oti, dev, id);
 973         if (IS_ERR(inode))
 974                 return PTR_ERR(inode);
 975
 976         iput(inode);
 977         osd_add_oi_cache(oti, dev, id, fid);
 978         /* Check shard by scrub only if it has a problem with OI */
 979         if (osd_oi_lookup(oti, dev, fid, &id2, 0) || !osd_id_eq(id, &id2))
 980                 osd_scrub_oi_insert(dev, fid, id, true);
 981         oclb->oclb_found = true;
 982
 983         return 1;
 984 }
 985
 986 WRAP_FILLDIR_FN(do_, osd_stripe_dir_filldir)
 987
 988 /*
 989  * When lookup item under striped directory, we need to locate the master
 990  * MDT-object of the striped directory firstly, then the client will send
 991  * lookup (getattr_by_name) RPC to the MDT with some slave MDT-object's FID
 992  * and the item's name. If the system is restored from MDT file level backup,
 993  * then before the OI scrub completely built the OI files, the OI mappings of
 994  * the master MDT-object and slave MDT-object may be invalid. Usually, it is
 995  * not a problem for the master MDT-object. Because when locate the master
 996  * MDT-object, we will do name based lookup (for the striped directory itself)
 997  * firstly, during such process we can setup the correct OI mapping for the
 998  * master MDT-object. But it will be trouble for the slave MDT-object. Because
 999  * the client will not trigger name based lookup on the MDT to locate the slave
1000  * MDT-object before locating item under the striped directory, then when
1001  * osd_fid_lookup(), it will find that the OI mapping for the slave MDT-object
1002  * is invalid and does not know what the right OI mapping is, then the MDT has
1003  * to return -EINPROGRESS to the client to notify that the OI scrub is rebuiding
1004  * the OI file, related OI mapping is unknown yet, please try again later. And
1005  * then client will re-try the RPC again and again until related OI mapping has
1006  * been updated. That is quite inefficient.
1007  *
1008  * To resolve above trouble, we will handle it as the following two cases:
1009  *
1010  * 1) The slave MDT-object and the master MDT-object are on different MDTs.
1011  *    It is relative easy. Be as one of remote MDT-objects, the slave MDT-object
1012  *    is linked under /REMOTE_PARENT_DIR with the name of its FID string.
1013  *    We can locate the slave MDT-object via lookup the /REMOTE_PARENT_DIR
1014  *    directly. Please check osd_fid_lookup().
1015  *
1016  * 2) The slave MDT-object and the master MDT-object reside on the same MDT.
1017  *    Under such case, during lookup the master MDT-object, we will lookup the
1018  *    slave MDT-object via readdir against the master MDT-object, because the
1019  *    slave MDT-objects information are stored as sub-directories with the name
1020  *    "${FID}:${index}". Then when find the local slave MDT-object, its OI
1021  *    mapping will be recorded. Then subsequent osd_fid_lookup() will know
1022  *    the correct OI mapping for the slave MDT-object.
1023  */
1024 static int osd_check_lmv(struct osd_thread_info *oti, struct osd_device *dev,
1025                          struct inode *inode)
1026 {
1027         struct lu_buf *buf = &oti->oti_big_buf;
1028         struct file *filp;
1029         struct lmv_mds_md_v1 *lmv1;
1030         struct osd_check_lmv_buf oclb = {
1031                 .ctx.actor = osd_stripe_dir_filldir,
1032                 .oclb_info = oti,
1033                 .oclb_dev = dev,
1034                 .oclb_found = false,
1035         };
1036         int rc = 0;
1037
1038         ENTRY;
1039         /* We should use the VFS layer to create a real dentry. */
1040         oti->oti_obj_dentry.d_inode = inode;
1041         oti->oti_obj_dentry.d_sb = inode->i_sb;
1042
1043         filp = alloc_file_pseudo(inode, dev->od_mnt, "/", O_NOATIME,
1044                                  inode->i_fop);
1045         if (IS_ERR(filp))
1046                 RETURN(-ENOMEM);
1047
1048         filp->f_mode |= FMODE_64BITHASH;
1049         filp->f_pos = 0;
1050         ihold(inode);
1051 again:
1052         rc = __osd_xattr_get(inode, filp->f_path.dentry, XATTR_NAME_LMV,
1053                              buf->lb_buf, buf->lb_len);
1054         if (rc == -ERANGE) {
1055                 rc = __osd_xattr_get(inode, filp->f_path.dentry,
1056                                      XATTR_NAME_LMV, NULL, 0);
1057                 if (rc > 0) {
1058                         lu_buf_realloc(buf, rc);
1059                         if (buf->lb_buf == NULL)
1060                                 GOTO(out, rc = -ENOMEM);
1061
1062                         goto again;
1063                 }
1064         }
1065
1066         if (unlikely(rc == 0 || rc == -ENODATA))
1067                 GOTO(out, rc = 0);
1068
1069         if (rc < 0)
1070                 GOTO(out, rc);
1071
1072         if (unlikely(buf->lb_buf == NULL)) {
1073                 lu_buf_realloc(buf, rc);
1074                 if (buf->lb_buf == NULL)
1075                         GOTO(out, rc = -ENOMEM);
1076
1077                 goto again;
1078         }
1079
1080         lmv1 = buf->lb_buf;
1081         if (le32_to_cpu(lmv1->lmv_magic) != LMV_MAGIC_V1)
1082                 GOTO(out, rc = 0);
1083
1084         do {
1085                 oclb.oclb_items = 0;
1086                 rc = iterate_dir(filp, &oclb.ctx);
1087         } while (rc >= 0 && oclb.oclb_items > 0 && !oclb.oclb_found &&
1088                  filp->f_pos != LDISKFS_HTREE_EOF_64BIT);
1089 out:
1090         fput(filp);
1091         if (rc < 0)
1092                 CDEBUG(D_LFSCK,
1093                        "%s: cannot check LMV, ino = %lu/%u: rc = %d\n",
1094                        osd_ino2name(inode), inode->i_ino, inode->i_generation,
1095                        rc);
1096         else
1097                 rc = 0;
1098
1099         RETURN(rc);
1100 }
1101
1102 /**
1103  * Is object in scrub inconsistent/stale list.
1104  *
1105  * \a scrub has two lists, os_inconsistent_items contains mappings to fix, while
1106  * os_stale_items contains mappings failed to fix.
1107  */
1108 static bool fid_in_scrub_list(struct lustre_scrub *scrub,
1109                               const struct list_head *list,
1110                               const struct lu_fid *fid)
1111 {
1112         struct osd_inconsistent_item *oii;
1113
1114         if (list_empty(list))
1115                 return false;
1116
1117         spin_lock(&scrub->os_lock);
1118         list_for_each_entry(oii, list, oii_list) {
1119                 if (lu_fid_eq(fid, &oii->oii_cache.oic_fid)) {
1120                         spin_unlock(&scrub->os_lock);
1121                         return true;
1122                 }
1123         }
1124         spin_unlock(&scrub->os_lock);
1125
1126         return false;
1127 }
1128
1129 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
1130                           const struct lu_fid *fid,
1131                           const struct lu_object_conf *conf)
1132 {
1133         struct osd_thread_info *info;
1134         struct lu_device *ldev = obj->oo_dt.do_lu.lo_dev;
1135         struct osd_device *dev;
1136         struct osd_idmap_cache *oic;
1137         struct osd_inode_id *id;
1138         struct inode *inode = NULL;
1139         struct lustre_scrub *scrub;
1140         struct scrub_file *sf;
1141         __u32 flags = SS_CLEAR_DRYRUN | SS_CLEAR_FAILOUT | SS_AUTO_FULL;
1142         __u32 saved_ino;
1143         __u32 saved_gen;
1144         int result = 0;
1145         int rc1 = 0;
1146         bool remote = false;
1147         bool trusted = true;
1148         bool updated = false;
1149         bool checked = false;
1150         bool stale = false;
1151
1152         ENTRY;
1153
1154         LINVRNT(osd_invariant(obj));
1155         LASSERT(obj->oo_inode == NULL);
1156
1157         if (fid_is_sane(fid) == 0) {
1158                 CERROR("%s: invalid FID "DFID"\n", ldev->ld_obd->obd_name,
1159                        PFID(fid));
1160                 dump_stack();
1161                 RETURN(-EINVAL);
1162         }
1163
1164         dev = osd_dev(ldev);
1165         scrub = &dev->od_scrub.os_scrub;
1166         sf = &scrub->os_file;
1167         info = osd_oti_get(env);
1168         LASSERT(info);
1169         oic = &info->oti_cache;
1170
1171         if (CFS_FAIL_CHECK(OBD_FAIL_SRV_ENOENT))
1172                 RETURN(-ENOENT);
1173
1174         /*
1175          * For the object is created as locking anchor, or for the object to
1176          * be created on disk. No need to osd_oi_lookup() at here because FID
1177          * shouldn't never be re-used, if it's really a duplicate FID from
1178          * unexpected reason, we should be able to detect it later by calling
1179          * do_create->osd_oi_insert().
1180          */
1181         if (conf && conf->loc_flags & LOC_F_NEW)
1182                 RETURN(0);
1183
1184         /* Search order: 1. per-thread cache. */
1185         if (lu_fid_eq(fid, &oic->oic_fid) && likely(oic->oic_dev == dev)) {
1186                 id = &oic->oic_lid;
1187                 goto iget;
1188         }
1189
1190         /* Search order: 2. OI scrub pending list. */
1191         id = &info->oti_id;
1192         memset(id, 0, sizeof(struct osd_inode_id));
1193         if (fid_in_scrub_list(scrub, &scrub->os_inconsistent_items, fid) &&
1194             scrub->os_running)
1195                 RETURN(-EINPROGRESS);
1196
1197         stale = fid_in_scrub_list(scrub, &scrub->os_stale_items, fid);
1198         if (stale && CFS_FAIL_CHECK(OBD_FAIL_OSD_SCRUB_STALE))
1199                 RETURN(-ESTALE);
1200
1201         /*
1202          * The OI mapping in the OI file can be updated by the OI scrub
1203          * when we locate the inode via FID. So it may be not trustable.
1204          */
1205         trusted = false;
1206
1207         /* Search order: 3. OI files. */
1208         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1209         if (result == -ENOENT) {
1210                 if (!fid_is_norm(fid) ||
1211                     fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
1212                     !ldiskfs_test_bit(osd_oi_fid2idx(dev, fid),
1213                                       sf->sf_oi_bitmap))
1214                         GOTO(out, result = 0);
1215
1216                 goto trigger;
1217         }
1218
1219         /* -ESTALE is returned if inode of OST object doesn't exist */
1220         if (result == -ESTALE &&
1221             fid_is_on_ost(info, dev, fid, OI_CHECK_FLD)) {
1222                 GOTO(out, result = 0);
1223         }
1224
1225         if (result)
1226                 GOTO(out, result);
1227
1228 iget:
1229         obj->oo_inode = NULL;
1230         /* for later passes through checks, not true on first pass */
1231         if (!IS_ERR_OR_NULL(inode))
1232                 iput(inode);
1233
1234         inode = osd_iget_check(info, dev, fid, id, trusted);
1235         if (!IS_ERR(inode)) {
1236                 obj->oo_inode = inode;
1237                 result = 0;
1238                 if (remote)
1239                         goto trigger;
1240
1241                 goto check_lma;
1242         }
1243
1244         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_SCRUB_STALE))
1245                 goto trigger;
1246
1247         result = PTR_ERR(inode);
1248         if (result == -ENOENT || result == -ESTALE)
1249                 GOTO(out, result = 0);
1250
1251         if (result != -EREMCHG)
1252                 GOTO(out, result);
1253
1254 trigger:
1255         /* don't trigger repeatedly for stale mapping */
1256         if (stale)
1257                 GOTO(out, result = -ESTALE);
1258
1259         /*
1260          * We still have chance to get the valid inode: for the
1261          * object which is referenced by remote name entry, the
1262          * object on the local MDT will be linked under the dir
1263          * of "/REMOTE_PARENT_DIR" with its FID string as name.
1264          *
1265          * We do not know whether the object for the given FID
1266          * is referenced by some remote name entry or not, and
1267          * especially for DNE II, a multiple-linked object may
1268          * have many name entries reside on many MDTs.
1269          *
1270          * To simplify the operation, OSD will not distinguish
1271          * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
1272          * only happened for the RPC from other MDT during the
1273          * OI scrub, or for the client side RPC with FID only,
1274          * such as FID to path, or from old connected client.
1275          */
1276         if (!remote) {
1277                 rc1 = osd_lookup_in_remote_parent(info, dev, fid, id);
1278                 if (!rc1) {
1279                         remote = true;
1280                         trusted = true;
1281                         flags |= SS_AUTO_PARTIAL;
1282                         flags &= ~SS_AUTO_FULL;
1283                         goto iget;
1284                 }
1285         }
1286
1287         if (scrub->os_running) {
1288                 if (scrub->os_partial_scan && !scrub->os_in_join)
1289                         goto join;
1290
1291                 if (IS_ERR_OR_NULL(inode) || result) {
1292                         osd_scrub_oi_insert(dev, fid, id, result == -ENOENT);
1293                         GOTO(out, result = -EINPROGRESS);
1294                 }
1295
1296                 LASSERT(remote);
1297                 LASSERT(obj->oo_inode == inode);
1298
1299                 osd_scrub_oi_insert(dev, fid, id, true);
1300                 goto found;
1301         }
1302
1303         if (dev->od_scrub.os_scrub.os_auto_scrub_interval == AS_NEVER) {
1304                 if (!remote)
1305                         GOTO(out, result = -EREMCHG);
1306
1307                 LASSERT(!result);
1308                 LASSERT(obj->oo_inode == inode);
1309
1310                 osd_add_oi_cache(info, dev, id, fid);
1311                 goto found;
1312         }
1313
1314 join:
1315         if (IS_ERR_OR_NULL(inode) || result)
1316                 osd_scrub_oi_insert(dev, fid, id, result == -ENOENT);
1317
1318         rc1 = osd_scrub_start(env, dev, flags);
1319         CDEBUG_LIMIT(D_LFSCK | D_CONSOLE | D_WARNING,
1320                      "%s: trigger OI scrub by RPC for "DFID"/%u with flags %#x: rc = %d\n",
1321                      osd_name(dev), PFID(fid), id->oii_ino, flags, rc1);
1322         if (rc1 && rc1 != -EALREADY)
1323                 GOTO(out, result = -EREMCHG);
1324
1325         if (IS_ERR_OR_NULL(inode) || result)
1326                 GOTO(out, result = -EINPROGRESS);
1327
1328         LASSERT(remote);
1329         LASSERT(obj->oo_inode == inode);
1330         goto found;
1331
1332 check_lma:
1333         checked = true;
1334         if (unlikely(obj->oo_header))
1335                 goto found;
1336
1337         result = osd_check_lma(env, obj);
1338         if (!result)
1339                 goto found;
1340
1341         LASSERTF(id->oii_ino == inode->i_ino &&
1342                  id->oii_gen == inode->i_generation,
1343                  "locate wrong inode for FID: "DFID", %u/%u => %ld/%u\n",
1344                  PFID(fid), id->oii_ino, id->oii_gen,
1345                  inode->i_ino, inode->i_generation);
1346
1347         saved_ino = inode->i_ino;
1348         saved_gen = inode->i_generation;
1349
1350         if (unlikely(result == -ENODATA)) {
1351                 /*
1352                  * If the OI scrub updated the OI mapping by race, it
1353                  * must be valid. Trust the inode that has no LMA EA.
1354                  */
1355                 if (updated)
1356                         goto found;
1357
1358                 result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1359                 if (!result) {
1360                         /*
1361                          * The OI mapping is still there, the inode is still
1362                          * valid. It is just becaues the inode has no LMA EA.
1363                          */
1364                         if (saved_ino == id->oii_ino &&
1365                             saved_gen == id->oii_gen)
1366                                 goto found;
1367
1368                         /*
1369                          * It is the OI scrub updated the OI mapping by race.
1370                          * The new OI mapping must be valid.
1371                          */
1372                         trusted = true;
1373                         updated = true;
1374                         goto iget;
1375                 }
1376
1377                 /*
1378                  * "result == -ENOENT" means that the OI mappinghas been
1379                  * removed by race, so the inode belongs to other object.
1380                  *
1381                  * Others error can be returned  directly.
1382                  */
1383                 if (result == -ENOENT) {
1384                         obj->oo_inode = NULL;
1385                         result = 0;
1386                 }
1387         }
1388
1389         if (result != -EREMCHG)
1390                 GOTO(out, result);
1391
1392         LASSERT(!updated);
1393
1394         /*
1395          * if two OST objects map to the same inode, and inode mode is
1396          * (S_IFREG | S_ISUID | S_ISGID | S_ISVTX | 0666), which means it's
1397          * reserved by precreate, and not written yet, in this case, don't
1398          * set inode for the object whose FID mismatch, so that it can create
1399          * inode and not block precreate.
1400          */
1401         if (fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) &&
1402             inode->i_mode == (S_IFREG | S_ISUID | S_ISGID | S_ISVTX | 0666)) {
1403                 obj->oo_inode = NULL;
1404                 GOTO(out, result = 0);
1405         }
1406
1407         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1408         /*
1409          * "result == -ENOENT" means the cached OI mapping has been removed
1410          * from the OI file by race, above inode belongs to other object.
1411          */
1412         if (result == -ENOENT) {
1413                 obj->oo_inode = NULL;
1414                 GOTO(out, result = 0);
1415         }
1416
1417         if (result)
1418                 GOTO(out, result);
1419
1420         if (saved_ino == id->oii_ino && saved_gen == id->oii_gen) {
1421                 result = -EREMCHG;
1422                 osd_scrub_refresh_mapping(info, dev, fid, id, DTO_INDEX_DELETE,
1423                                           true, 0, NULL);
1424                 goto trigger;
1425         }
1426
1427         /*
1428          * It is the OI scrub updated the OI mapping by race.
1429          * The new OI mapping must be valid.
1430          */
1431         trusted = true;
1432         updated = true;
1433         goto iget;
1434
1435 found:
1436         if (!checked) {
1437                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
1438                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
1439
1440                 result = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
1441                 if (!result) {
1442                         if (lma->lma_compat & LMAC_STRIPE_INFO &&
1443                             dev->od_is_ost)
1444                                 obj->oo_pfid_in_lma = 1;
1445                         if (unlikely(lma->lma_incompat & LMAI_REMOTE_PARENT) &&
1446                             !dev->od_is_ost)
1447                                 lu_object_set_agent_entry(&obj->oo_dt.do_lu);
1448                 } else if (result != -ENODATA) {
1449                         GOTO(out, result);
1450                 }
1451         }
1452
1453         obj->oo_compat_dot_created = 1;
1454         obj->oo_compat_dotdot_created = 1;
1455
1456         if (S_ISDIR(inode->i_mode) &&
1457             (flags & SS_AUTO_PARTIAL || sf->sf_status == SS_SCANNING))
1458                 osd_check_lmv(info, dev, inode);
1459
1460         result = osd_attach_jinode(inode);
1461         if (result)
1462                 GOTO(out, result);
1463
1464         if (!ldiskfs_pdo)
1465                 GOTO(out, result = 0);
1466
1467         LASSERT(!obj->oo_hl_head);
1468         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
1469
1470         GOTO(out, result = (!obj->oo_hl_head ? -ENOMEM : 0));
1471
1472 out:
1473         if (!result && stale)
1474                 osd_scrub_oi_resurrect(scrub, fid);
1475
1476         if (result || !obj->oo_inode) {
1477                 if (!IS_ERR_OR_NULL(inode))
1478                         iput(inode);
1479
1480                 obj->oo_inode = NULL;
1481                 if (trusted)
1482                         fid_zero(&oic->oic_fid);
1483         }
1484
1485         LINVRNT(osd_invariant(obj));
1486         return result;
1487 }
1488
1489 /*
1490  * Concurrency: shouldn't matter.
1491  */
1492 static void osd_object_init0(struct osd_object *obj)
1493 {
1494         LASSERT(obj->oo_inode != NULL);
1495         obj->oo_dt.do_body_ops = &osd_body_ops;
1496         obj->oo_dt.do_lu.lo_header->loh_attr |=
1497                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
1498 }
1499
1500 /*
1501  * Concurrency: no concurrent access is possible that early in object
1502  * life-cycle.
1503  */
1504 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
1505                            const struct lu_object_conf *conf)
1506 {
1507         struct osd_object *obj = osd_obj(l);
1508         int result;
1509
1510         LINVRNT(osd_invariant(obj));
1511
1512         if (CFS_FAIL_PRECHECK(OBD_FAIL_MDS_LLOG_UMOUNT_RACE) &&
1513             cfs_fail_val == 2) {
1514                 struct osd_thread_info *info = osd_oti_get(env);
1515                 struct osd_idmap_cache *oic = &info->oti_cache;
1516                 /* invalidate thread cache */
1517                 memset(&oic->oic_fid, 0, sizeof(oic->oic_fid));
1518         }
1519         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
1520                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
1521                 l->lo_header->loh_attr |= LOHA_EXISTS;
1522                 return 0;
1523         }
1524
1525         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
1526         obj->oo_dt.do_body_ops = &osd_body_ops_new;
1527         if (result == 0 && obj->oo_inode != NULL) {
1528                 struct osd_thread_info *oti = osd_oti_get(env);
1529                 struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
1530
1531                 osd_object_init0(obj);
1532                 if (unlikely(obj->oo_header))
1533                         return 0;
1534
1535                 result = osd_get_lma(oti, obj->oo_inode,
1536                                      &oti->oti_obj_dentry, loa);
1537                 if (!result) {
1538                         /*
1539                          * Convert LMAI flags to lustre LMA flags
1540                          * and cache it to oo_lma_flags
1541                          */
1542                         obj->oo_lma_flags =
1543                                 lma_to_lustre_flags(loa->loa_lma.lma_incompat);
1544                 } else if (result == -ENODATA) {
1545                         result = 0;
1546                 }
1547         }
1548         obj->oo_dirent_count = LU_DIRENT_COUNT_UNSET;
1549
1550         LINVRNT(osd_invariant(obj));
1551         return result;
1552 }
1553
1554 /*
1555  * The first part of oxe_buf is xattr name, and is '\0' terminated.
1556  * The left part is for value, binary mode.
1557  */
1558 struct osd_xattr_entry {
1559         struct list_head        oxe_list;
1560         size_t                  oxe_len;
1561         size_t                  oxe_namelen;
1562         bool                    oxe_exist;
1563         struct rcu_head         oxe_rcu;
1564         char                    oxe_buf[0];
1565 };
1566
1567 static int osd_oxc_get(struct osd_object *obj, const char *name,
1568                        struct lu_buf *buf)
1569 {
1570         struct osd_xattr_entry *tmp;
1571         struct osd_xattr_entry *oxe = NULL;
1572         size_t namelen = strlen(name);
1573         int rc;
1574
1575         rcu_read_lock();
1576         list_for_each_entry_rcu(tmp, &obj->oo_xattr_list, oxe_list) {
1577                 if (namelen == tmp->oxe_namelen &&
1578                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1579                         oxe = tmp;
1580                         break;
1581                 }
1582         }
1583
1584         if (oxe == NULL)
1585                 GOTO(out, rc = -ENOENT);
1586
1587         if (!oxe->oxe_exist)
1588                 GOTO(out, rc = -ENODATA);
1589
1590         /* vallen */
1591         rc = oxe->oxe_len - sizeof(*oxe) - oxe->oxe_namelen - 1;
1592         LASSERT(rc > 0);
1593
1594         if (buf->lb_buf == NULL)
1595                 GOTO(out, rc);
1596
1597         if (buf->lb_len < rc)
1598                 GOTO(out, rc = -ERANGE);
1599
1600         memcpy(buf->lb_buf, &oxe->oxe_buf[namelen + 1], rc);
1601 out:
1602         rcu_read_unlock();
1603
1604         return rc;
1605 }
1606
1607 static void osd_oxc_free(struct rcu_head *head)
1608 {
1609         struct osd_xattr_entry *oxe;
1610
1611         oxe = container_of(head, struct osd_xattr_entry, oxe_rcu);
1612         OBD_FREE(oxe, oxe->oxe_len);
1613 }
1614
1615 static void osd_oxc_add(struct osd_object *obj, const char *name,
1616                         const char *buf, int buflen)
1617 {
1618         struct osd_xattr_entry *oxe;
1619         struct osd_xattr_entry *old = NULL;
1620         struct osd_xattr_entry *tmp;
1621         size_t namelen = strlen(name);
1622         size_t len = sizeof(*oxe) + namelen + 1 + buflen;
1623
1624         OBD_ALLOC(oxe, len);
1625         if (oxe == NULL)
1626                 return;
1627
1628         INIT_LIST_HEAD(&oxe->oxe_list);
1629         oxe->oxe_len = len;
1630         oxe->oxe_namelen = namelen;
1631         memcpy(oxe->oxe_buf, name, namelen);
1632         if (buflen > 0) {
1633                 LASSERT(buf != NULL);
1634                 memcpy(oxe->oxe_buf + namelen + 1, buf, buflen);
1635                 oxe->oxe_exist = true;
1636         } else {
1637                 oxe->oxe_exist = false;
1638         }
1639
1640         /* this should be rarely called, just remove old and add new */
1641         spin_lock(&obj->oo_guard);
1642         list_for_each_entry(tmp, &obj->oo_xattr_list, oxe_list) {
1643                 if (namelen == tmp->oxe_namelen &&
1644                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1645                         old = tmp;
1646                         break;
1647                 }
1648         }
1649         if (old != NULL) {
1650                 list_replace_rcu(&old->oxe_list, &oxe->oxe_list);
1651                 call_rcu(&old->oxe_rcu, osd_oxc_free);
1652         } else {
1653                 list_add_tail_rcu(&oxe->oxe_list, &obj->oo_xattr_list);
1654         }
1655         spin_unlock(&obj->oo_guard);
1656 }
1657
1658 static void osd_oxc_del(struct osd_object *obj, const char *name)
1659 {
1660         struct osd_xattr_entry *oxe;
1661         size_t namelen = strlen(name);
1662
1663         spin_lock(&obj->oo_guard);
1664         list_for_each_entry(oxe, &obj->oo_xattr_list, oxe_list) {
1665                 if (namelen == oxe->oxe_namelen &&
1666                     strncmp(name, oxe->oxe_buf, namelen) == 0) {
1667                         list_del_rcu(&oxe->oxe_list);
1668                         call_rcu(&oxe->oxe_rcu, osd_oxc_free);
1669                         break;
1670                 }
1671         }
1672         spin_unlock(&obj->oo_guard);
1673 }
1674
1675 static void osd_oxc_fini(struct osd_object *obj)
1676 {
1677         struct osd_xattr_entry *oxe, *next;
1678
1679         list_for_each_entry_safe(oxe, next, &obj->oo_xattr_list, oxe_list) {
1680                 list_del(&oxe->oxe_list);
1681                 OBD_FREE(oxe, oxe->oxe_len);
1682         }
1683 }
1684
1685 /*
1686  * Concurrency: no concurrent access is possible that late in object
1687  * life-cycle.
1688  */
1689 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
1690 {
1691         struct osd_object *obj = osd_obj(l);
1692         struct lu_object_header *h = obj->oo_header;
1693
1694         LINVRNT(osd_invariant(obj));
1695
1696         osd_oxc_fini(obj);
1697         dt_object_fini(&obj->oo_dt);
1698         if (obj->oo_hl_head != NULL)
1699                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
1700         /* obj doesn't contain an lu_object_header, so we don't need call_rcu */
1701         OBD_FREE_PTR(obj);
1702         if (unlikely(h))
1703                 lu_object_header_free(h);
1704 }
1705
1706 /*
1707  * Concurrency: no concurrent access is possible that late in object
1708  * life-cycle.
1709  */
1710 static void osd_index_fini(struct osd_object *o)
1711 {
1712         struct iam_container *bag;
1713
1714         if (o->oo_dir != NULL) {
1715                 bag = &o->oo_dir->od_container;
1716                 if (o->oo_inode != NULL) {
1717                         if (bag->ic_object == o->oo_inode)
1718                                 iam_container_fini(bag);
1719                 }
1720                 OBD_FREE_PTR(o->oo_dir);
1721                 o->oo_dir = NULL;
1722         }
1723 }
1724
1725 enum {
1726         OSD_TXN_OI_DELETE_CREDITS    = 20,
1727         OSD_TXN_INODE_DELETE_CREDITS = 20
1728 };
1729
1730 /*
1731  * Journal
1732  */
1733
1734 #if OSD_THANDLE_STATS
1735 /**
1736  * Set time when the handle is allocated
1737  */
1738 static void osd_th_alloced(struct osd_thandle *oth)
1739 {
1740         oth->oth_alloced = ktime_get();
1741 }
1742
1743 /**
1744  * Set time when the handle started
1745  */
1746 static void osd_th_started(struct osd_thandle *oth)
1747 {
1748         oth->oth_started = ktime_get();
1749 }
1750
1751 /**
1752  * Check whether the we deal with this handle for too long.
1753  */
1754 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
1755                                 ktime_t alloced, ktime_t started,
1756                                 ktime_t closed)
1757 {
1758         ktime_t now = ktime_get();
1759
1760         LASSERT(dev != NULL);
1761
1762         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
1763                             ktime_us_delta(started, alloced));
1764         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
1765                             ktime_us_delta(closed, started));
1766         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
1767                             ktime_us_delta(now, closed));
1768
1769         if (ktime_before(ktime_add_ns(alloced, 30 * NSEC_PER_SEC), now)) {
1770                 CWARN("transaction handle %p was open for too long: now %lld, alloced %lld, started %lld, closed %lld\n",
1771                                 oth, now, alloced, started, closed);
1772                 libcfs_debug_dumpstack(NULL);
1773         }
1774 }
1775
1776 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
1777 {                                                                       \
1778         ktime_t __closed = ktime_get();                                 \
1779         ktime_t __alloced = oth->oth_alloced;                           \
1780         ktime_t __started = oth->oth_started;                           \
1781                                                                         \
1782         expr;                                                           \
1783         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
1784 }
1785
1786 #else /* OSD_THANDLE_STATS */
1787
1788 #define osd_th_alloced(h)                  do {} while(0)
1789 #define osd_th_started(h)                  do {} while(0)
1790 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
1791
1792 #endif /* OSD_THANDLE_STATS */
1793
1794 /*
1795  * in some cases (like overstriped files) the same operations on the same
1796  * objects are declared many times and this may lead to huge number of
1797  * credits which can be a problem and/or cause performance degradation.
1798  * this function is to remember what declarations have been made within
1799  * a given thandle and then skip duplications.
1800  * limit it's scope so that regular small transactions don't need all
1801  * this overhead with allocations, lists.
1802  * also, limit scope to the specific objects like llogs, etc.
1803  */
1804 static inline bool osd_check_special_fid(const struct lu_fid *f)
1805 {
1806         if (fid_seq_is_llog(f->f_seq))
1807                 return true;
1808         if (f->f_seq == FID_SEQ_LOCAL_FILE &&
1809             f->f_oid == MDD_LOV_OBJ_OID)
1810                 return true;
1811         return false;
1812 }
1813
1814 bool osd_tx_was_declared(const struct lu_env *env, struct osd_thandle *oth,
1815                          struct dt_object *dt, enum dt_txn_op op, loff_t pos)
1816 {
1817         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
1818         struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1819         struct osd_thread_info *oti = osd_oti_get(env);
1820         struct osd_obj_declare *old;
1821
1822         if (osd->od_is_ost)
1823                 return false;
1824
1825         /* small transactions don't need this overhead */
1826         if (oti->oti_declare_ops[DTO_OBJECT_CREATE] < 10 &&
1827             oti->oti_declare_ops[DTO_WRITE_BASE] < 10)
1828                 return false;
1829
1830         if (osd_check_special_fid(fid) == 0)
1831                 return false;
1832
1833         list_for_each_entry(old, &oth->ot_declare_list, old_list) {
1834                 if (old->old_op == op && old->old_pos == pos &&
1835                     lu_fid_eq(&old->old_fid, fid))
1836                         return true;
1837         }
1838         OBD_ALLOC_PTR(old);
1839         if (unlikely(old == NULL))
1840                 return false;
1841         old->old_fid = *lu_object_fid(&dt->do_lu);
1842         old->old_op = op;
1843         old->old_pos = pos;
1844         list_add(&old->old_list, &oth->ot_declare_list);
1845         return false;
1846 }
1847
1848 void osd_tx_declaration_free(struct osd_thandle *oth)
1849 {
1850         struct osd_obj_declare *old, *tmp;
1851
1852         list_for_each_entry_safe(old, tmp, &oth->ot_declare_list, old_list) {
1853                 list_del_init(&old->old_list);
1854                 OBD_FREE_PTR(old);
1855         }
1856 }
1857
1858 /*
1859  * Concurrency: doesn't access mutable data.
1860  */
1861 static int osd_param_is_not_sane(const struct osd_device *dev,
1862                                  const struct thandle *th)
1863 {
1864         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
1865
1866         return oh->ot_credits > osd_transaction_size(dev);
1867 }
1868
1869 /*
1870  * Concurrency: shouldn't matter.
1871  */
1872 static void osd_trans_commit_cb(struct super_block *sb,
1873                                 struct ldiskfs_journal_cb_entry *jcb, int error)
1874 {
1875         struct osd_thandle *oh = container_of(jcb, struct osd_thandle, ot_jcb);
1876         struct thandle *th = &oh->ot_super;
1877         struct lu_device *lud = &th->th_dev->dd_lu_dev;
1878         struct osd_device *osd = osd_dev(lud);
1879         struct dt_txn_commit_cb *dcb, *tmp;
1880
1881         LASSERT(oh->ot_handle == NULL);
1882
1883         if (error)
1884                 CERROR("transaction @0x%p commit error: %d\n", th, error);
1885
1886         /* call per-transaction callbacks if any */
1887         list_for_each_entry_safe(dcb, tmp, &oh->ot_commit_dcb_list,
1888                                  dcb_linkage) {
1889                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
1890                          "commit callback entry: magic=%x name='%s'\n",
1891                          dcb->dcb_magic, dcb->dcb_name);
1892                 list_del_init(&dcb->dcb_linkage);
1893                 dcb->dcb_func(NULL, th, dcb, error);
1894         }
1895
1896         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
1897         if (atomic_dec_and_test(&osd->od_commit_cb_in_flight))
1898                 wake_up(&osd->od_commit_cb_done);
1899         th->th_dev = NULL;
1900
1901         OBD_FREE_PTR(oh);
1902 }
1903
1904 static struct thandle *osd_trans_create(const struct lu_env *env,
1905                                         struct dt_device *d)
1906 {
1907         struct osd_thread_info *oti = osd_oti_get(env);
1908         struct osd_iobuf *iobuf = &oti->oti_iobuf;
1909         struct osd_thandle *oh;
1910         struct thandle *th;
1911
1912         ENTRY;
1913
1914         if (d->dd_rdonly) {
1915                 CERROR("%s: someone try to start transaction under "
1916                        "readonly mode, should be disabled.\n",
1917                        osd_name(osd_dt_dev(d)));
1918                 dump_stack();
1919                 RETURN(ERR_PTR(-EROFS));
1920         }
1921
1922         /* on pending IO in this thread should left from prev. request */
1923         LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
1924
1925         sb_start_write(osd_sb(osd_dt_dev(d)));
1926
1927         OBD_ALLOC_GFP(oh, sizeof(*oh), GFP_NOFS);
1928         if (!oh) {
1929                 sb_end_write(osd_sb(osd_dt_dev(d)));
1930                 RETURN(ERR_PTR(-ENOMEM));
1931         }
1932
1933         oh->ot_quota_trans = &oti->oti_quota_trans;
1934         memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
1935         th = &oh->ot_super;
1936         th->th_dev = d;
1937         th->th_result = 0;
1938         oh->ot_credits = 0;
1939         oh->oh_declared_ext = 0;
1940         INIT_LIST_HEAD(&oh->ot_commit_dcb_list);
1941         INIT_LIST_HEAD(&oh->ot_stop_dcb_list);
1942         INIT_LIST_HEAD(&oh->ot_trunc_locks);
1943         INIT_LIST_HEAD(&oh->ot_declare_list);
1944         osd_th_alloced(oh);
1945
1946         memset(oti->oti_declare_ops, 0,
1947                sizeof(oti->oti_declare_ops));
1948         memset(oti->oti_declare_ops_cred, 0,
1949                sizeof(oti->oti_declare_ops_cred));
1950         memset(oti->oti_declare_ops_used, 0,
1951                sizeof(oti->oti_declare_ops_used));
1952
1953         oti->oti_ins_cache_depth++;
1954
1955         RETURN(th);
1956 }
1957
1958 void osd_trans_dump_creds(const struct lu_env *env, struct thandle *th)
1959 {
1960         struct osd_thread_info *oti = osd_oti_get(env);
1961         struct osd_thandle *oh;
1962
1963         oh = container_of(th, struct osd_thandle, ot_super);
1964         LASSERT(oh != NULL);
1965
1966         CWARN("  create: %u/%u/%u, destroy: %u/%u/%u\n",
1967               oti->oti_declare_ops[OSD_OT_CREATE],
1968               oti->oti_declare_ops_cred[OSD_OT_CREATE],
1969               oti->oti_declare_ops_used[OSD_OT_CREATE],
1970               oti->oti_declare_ops[OSD_OT_DESTROY],
1971               oti->oti_declare_ops_cred[OSD_OT_DESTROY],
1972               oti->oti_declare_ops_used[OSD_OT_DESTROY]);
1973         CWARN("  attr_set: %u/%u/%u, xattr_set: %u/%u/%u\n",
1974               oti->oti_declare_ops[OSD_OT_ATTR_SET],
1975               oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
1976               oti->oti_declare_ops_used[OSD_OT_ATTR_SET],
1977               oti->oti_declare_ops[OSD_OT_XATTR_SET],
1978               oti->oti_declare_ops_cred[OSD_OT_XATTR_SET],
1979               oti->oti_declare_ops_used[OSD_OT_XATTR_SET]);
1980         CWARN("  write: %u/%u/%u, punch: %u/%u/%u, quota %u/%u/%u\n",
1981               oti->oti_declare_ops[OSD_OT_WRITE],
1982               oti->oti_declare_ops_cred[OSD_OT_WRITE],
1983               oti->oti_declare_ops_used[OSD_OT_WRITE],
1984               oti->oti_declare_ops[OSD_OT_PUNCH],
1985               oti->oti_declare_ops_cred[OSD_OT_PUNCH],
1986               oti->oti_declare_ops_used[OSD_OT_PUNCH],
1987               oti->oti_declare_ops[OSD_OT_QUOTA],
1988               oti->oti_declare_ops_cred[OSD_OT_QUOTA],
1989               oti->oti_declare_ops_used[OSD_OT_QUOTA]);
1990         CWARN("  insert: %u/%u/%u, delete: %u/%u/%u\n",
1991               oti->oti_declare_ops[OSD_OT_INSERT],
1992               oti->oti_declare_ops_cred[OSD_OT_INSERT],
1993               oti->oti_declare_ops_used[OSD_OT_INSERT],
1994               oti->oti_declare_ops[OSD_OT_DELETE],
1995               oti->oti_declare_ops_cred[OSD_OT_DELETE],
1996               oti->oti_declare_ops_used[OSD_OT_DELETE]);
1997         CWARN("  ref_add: %u/%u/%u, ref_del: %u/%u/%u\n",
1998               oti->oti_declare_ops[OSD_OT_REF_ADD],
1999               oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
2000               oti->oti_declare_ops_used[OSD_OT_REF_ADD],
2001               oti->oti_declare_ops[OSD_OT_REF_DEL],
2002               oti->oti_declare_ops_cred[OSD_OT_REF_DEL],
2003               oti->oti_declare_ops_used[OSD_OT_REF_DEL]);
2004 }
2005
2006 /*
2007  * Concurrency: shouldn't matter.
2008  */
2009 static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
2010                            struct thandle *th)
2011 {
2012         struct osd_thread_info *oti = osd_oti_get(env);
2013         struct osd_device *dev = osd_dt_dev(d);
2014         handle_t *jh;
2015         struct osd_thandle *oh;
2016         int rc;
2017
2018         ENTRY;
2019
2020         LASSERT(current->journal_info == NULL);
2021
2022         oh = container_of(th, struct osd_thandle, ot_super);
2023         LASSERT(oh != NULL);
2024         LASSERT(oh->ot_handle == NULL);
2025         if (unlikely(ldiskfs_track_declares_assert != 0)) {
2026                 LASSERT(oti->oti_r_locks == 0);
2027                 LASSERT(oti->oti_w_locks == 0);
2028         }
2029
2030         rc = dt_txn_hook_start(env, d, th);
2031         if (rc != 0)
2032                 GOTO(out, rc);
2033
2034         if (unlikely(osd_param_is_not_sane(dev, th))) {
2035                 static unsigned long last_printed;
2036                 static int last_credits;
2037
2038                 lprocfs_counter_add(dev->od_stats,
2039                                     LPROC_OSD_TOO_MANY_CREDITS, 1);
2040
2041                 /*
2042                  * don't make noise on a tiny testing systems
2043                  * actual credits misuse will be caught anyway
2044                  */
2045                 if (last_credits != oh->ot_credits &&
2046                     time_after(jiffies, last_printed +
2047                                cfs_time_seconds(60)) &&
2048                     osd_transaction_size(dev) > 512) {
2049                         CWARN("%s: credits %u > trans_max %u\n", osd_name(dev),
2050                               oh->ot_credits, osd_transaction_size(dev));
2051                         osd_trans_dump_creds(env, th);
2052                         libcfs_debug_dumpstack(NULL);
2053                         last_credits = oh->ot_credits;
2054                         last_printed = jiffies;
2055                 }
2056                 /*
2057                  * XXX Limit the credits to 'max_transaction_buffers', and
2058                  *     let the underlying filesystem to catch the error if
2059                  *     we really need so many credits.
2060                  *
2061                  *     This should be removed when we can calculate the
2062                  *     credits precisely.
2063                  */
2064                 oh->ot_credits = osd_transaction_size(dev);
2065         } else if (ldiskfs_track_declares_assert != 0) {
2066                 /*
2067                  * reserve few credits to prevent an assertion in JBD
2068                  * our debugging mechanism will be able to detected
2069                  * overuse. this can help to debug single-update
2070                  * transactions
2071                  */
2072                 oh->ot_credits += 10;
2073                 if (unlikely(osd_param_is_not_sane(dev, th)))
2074                         oh->ot_credits = osd_transaction_size(dev);
2075         }
2076
2077         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_TXN_START))
2078                 GOTO(out, rc = -EIO);
2079
2080          /*
2081           * we ignore quota checks for system-owned files, but still
2082           * need to count blocks for uid/gid/projid
2083           */
2084         osd_trans_declare_op(env, oh, OSD_OT_QUOTA, 3);
2085
2086         /*
2087          * XXX temporary stuff. Some abstraction layer should
2088          * be used.
2089          */
2090         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
2091         osd_th_started(oh);
2092         if (!IS_ERR(jh)) {
2093                 oh->ot_handle = jh;
2094                 LASSERT(oti->oti_txns == 0);
2095
2096                 atomic_inc(&dev->od_commit_cb_in_flight);
2097                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
2098                               "osd-tx", th);
2099                 oti->oti_txns++;
2100                 rc = 0;
2101         } else {
2102                 rc = PTR_ERR(jh);
2103         }
2104 out:
2105         RETURN(rc);
2106 }
2107
2108 static int osd_seq_exists(const struct lu_env *env,
2109                           struct osd_device *osd, u64 seq)
2110 {
2111         struct lu_seq_range *range = &osd_oti_get(env)->oti_seq_range;
2112         struct seq_server_site *ss = osd_seq_site(osd);
2113         int rc;
2114
2115         ENTRY;
2116
2117         LASSERT(ss != NULL);
2118         LASSERT(ss->ss_server_fld != NULL);
2119
2120         rc = osd_fld_lookup(env, osd, seq, range);
2121         if (rc != 0) {
2122                 if (rc != -ENOENT)
2123                         CERROR("%s: can't lookup FLD sequence %#llx: rc = %d\n",
2124                                osd_name(osd), seq, rc);
2125                 RETURN(0);
2126         }
2127
2128         RETURN(ss->ss_node_id == range->lsr_index);
2129 }
2130
2131 static void osd_trans_stop_cb(struct osd_thandle *oth, int result)
2132 {
2133         struct dt_txn_commit_cb *dcb;
2134         struct dt_txn_commit_cb *tmp;
2135
2136         /* call per-transaction stop callbacks if any */
2137         list_for_each_entry_safe(dcb, tmp, &oth->ot_stop_dcb_list,
2138                                  dcb_linkage) {
2139                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
2140                          "commit callback entry: magic=%x name='%s'\n",
2141                          dcb->dcb_magic, dcb->dcb_name);
2142                 list_del_init(&dcb->dcb_linkage);
2143                 dcb->dcb_func(NULL, &oth->ot_super, dcb, result);
2144         }
2145 }
2146
2147 /*
2148  * Concurrency: shouldn't matter.
2149  */
2150 static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
2151                           struct thandle *th)
2152 {
2153         struct osd_thread_info *oti = osd_oti_get(env);
2154         struct osd_thandle *oh;
2155         struct osd_iobuf *iobuf = &oti->oti_iobuf;
2156         struct osd_device *osd = osd_dt_dev(th->th_dev);
2157         struct qsd_instance *qsd = osd_def_qsd(osd);
2158         struct lquota_trans *qtrans;
2159         LIST_HEAD(truncates);
2160         int rc = 0, remove_agents = 0;
2161
2162         ENTRY;
2163
2164         oh = container_of(th, struct osd_thandle, ot_super);
2165
2166         remove_agents = oh->ot_remove_agents;
2167
2168         qtrans = oh->ot_quota_trans;
2169         oh->ot_quota_trans = NULL;
2170
2171         osd_tx_declaration_free(oh);
2172
2173         /* move locks to local list, stop tx, execute truncates */
2174         list_splice(&oh->ot_trunc_locks, &truncates);
2175
2176         if (oh->ot_handle != NULL) {
2177                 int rc2;
2178
2179                 handle_t *hdl = oh->ot_handle;
2180
2181                 /*
2182                  * add commit callback
2183                  * notice we don't do this in osd_trans_start()
2184                  * as underlying transaction can change during truncate
2185                  */
2186                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
2187                                              &oh->ot_jcb);
2188
2189                 LASSERT(oti->oti_txns == 1);
2190                 oti->oti_txns--;
2191
2192                 rc = dt_txn_hook_stop(env, th);
2193                 if (rc != 0)
2194                         CERROR("%s: failed in transaction hook: rc = %d\n",
2195                                osd_name(osd), rc);
2196
2197                 osd_trans_stop_cb(oh, rc);
2198                 /* hook functions might modify th_sync */
2199                 hdl->h_sync = th->th_sync;
2200
2201                 oh->ot_handle = NULL;
2202                 OSD_CHECK_SLOW_TH(oh, osd, rc2 = ldiskfs_journal_stop(hdl));
2203                 if (rc2 != 0)
2204                         CERROR("%s: failed to stop transaction: rc = %d\n",
2205                                osd_name(osd), rc2);
2206                 if (!rc)
2207                         rc = rc2;
2208
2209                 /* We preserve the origin behavior of ignoring any
2210                  * failures with the underlying punch / truncate
2211                  * operation. We do record for debugging if an error
2212                  * does occur in the lctl dk logs.
2213                  */
2214                 rc2 = osd_process_truncates(env, &truncates);
2215                 if (rc2 != 0)
2216                         CERROR("%s: failed truncate process: rc = %d\n",
2217                                osd_name(osd), rc2);
2218         } else {
2219                 osd_trans_stop_cb(oh, th->th_result);
2220                 OBD_FREE_PTR(oh);
2221         }
2222
2223         osd_trunc_unlock_all(env, &truncates);
2224
2225         /* inform the quota slave device that the transaction is stopping */
2226         qsd_op_end(env, qsd, qtrans);
2227
2228         /*
2229          * as we want IO to journal and data IO be concurrent, we don't block
2230          * awaiting data IO completion in osd_do_bio(), instead we wait here
2231          * once transaction is submitted to the journal. all reqular requests
2232          * don't do direct IO (except read/write), thus this wait_event becomes
2233          * no-op for them.
2234          *
2235          * IMPORTANT: we have to wait till any IO submited by the thread is
2236          * completed otherwise iobuf may be corrupted by different request
2237          */
2238         wait_event(iobuf->dr_wait,
2239                        atomic_read(&iobuf->dr_numreqs) == 0);
2240
2241         if (!rc)
2242                 rc = iobuf->dr_error;
2243
2244         osd_fini_iobuf(osd, iobuf);
2245
2246         if (unlikely(remove_agents != 0))
2247                 osd_process_scheduled_agent_removals(env, osd);
2248
2249         LASSERT(oti->oti_ins_cache_depth > 0);
2250         oti->oti_ins_cache_depth--;
2251         /* reset OI cache for safety */
2252         if (oti->oti_ins_cache_depth == 0)
2253                 oti->oti_ins_cache_used = 0;
2254
2255         sb_end_write(osd_sb(osd));
2256
2257         RETURN(rc);
2258 }
2259
2260 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
2261 {
2262         struct osd_thandle *oh = container_of(th, struct osd_thandle,
2263                                               ot_super);
2264
2265         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
2266         LASSERT(&dcb->dcb_func != NULL);
2267         if (dcb->dcb_flags & DCB_TRANS_STOP)
2268                 list_add(&dcb->dcb_linkage, &oh->ot_stop_dcb_list);
2269         else
2270                 list_add(&dcb->dcb_linkage, &oh->ot_commit_dcb_list);
2271
2272         return 0;
2273 }
2274
2275 struct osd_delayed_iput_work {
2276         struct work_struct diw_work;
2277         struct inode      *diw_inode;
2278 };
2279
2280 static void osd_delayed_iput_fn(struct work_struct *work)
2281 {
2282         struct osd_delayed_iput_work *diwork;
2283         struct inode *inode;
2284
2285         diwork = container_of(work, struct osd_delayed_iput_work, diw_work);
2286         inode = diwork->diw_inode;
2287         CDEBUG(D_INODE, "%s: delayed iput (ino=%lu)\n",
2288                inode->i_sb->s_id, inode->i_ino);
2289         iput(inode);
2290         OBD_FREE_PTR(diwork);
2291 }
2292
2293 noinline void osd_delayed_iput(struct inode *inode,
2294                                struct osd_delayed_iput_work *diwork)
2295 {
2296         if (!diwork) {
2297                 iput(inode);
2298         } else {
2299                 INIT_WORK(&diwork->diw_work, osd_delayed_iput_fn);
2300                 diwork->diw_inode = inode;
2301                 queue_work(LDISKFS_SB(inode->i_sb)->s_misc_wq,
2302                            &diwork->diw_work);
2303         }
2304 }
2305
2306 /*
2307  * Called just before object is freed. Releases all resources except for
2308  * object itself (that is released by osd_object_free()).
2309  *
2310  * Concurrency: no concurrent access is possible that late in object
2311  * life-cycle.
2312  */
2313 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
2314 {
2315         struct osd_object *obj = osd_obj(l);
2316         struct qsd_instance *qsd = osd_def_qsd(osd_obj2dev(obj));
2317         struct inode *inode = obj->oo_inode;
2318         struct osd_delayed_iput_work *diwork = NULL;
2319         __u64 projid;
2320         qid_t uid;
2321         qid_t gid;
2322
2323         LINVRNT(osd_invariant(obj));
2324
2325         /*
2326          * If object is unlinked remove fid->ino mapping from object index.
2327          */
2328
2329         osd_index_fini(obj);
2330
2331         if (!inode)
2332                 return;
2333
2334         if (inode->i_blocks > ldiskfs_delayed_unlink_blocks)
2335                 OBD_ALLOC(diwork, sizeof(*diwork));
2336
2337         if (osd_has_index(obj) &&  obj->oo_dt.do_index_ops == &osd_index_iam_ops)
2338                 ldiskfs_set_inode_flag(inode, LDISKFS_INODE_JOURNAL_DATA);
2339
2340         uid = i_uid_read(inode);
2341         gid = i_gid_read(inode);
2342         projid = i_projid_read(inode);
2343
2344         obj->oo_inode = NULL;
2345         osd_delayed_iput(inode, diwork);
2346
2347         /* do not rebalance quota if the caller needs to release memory
2348          * otherwise qsd_refresh_usage() may went into a new ldiskfs
2349          * transaction and risk to deadlock - LU-12178 */
2350         if (current->flags & (PF_MEMALLOC | PF_KSWAPD))
2351                 return;
2352
2353         if (!obj->oo_header && qsd) {
2354                 struct osd_thread_info *info = osd_oti_get(env);
2355                 struct lquota_id_info *qi = &info->oti_qi;
2356
2357                 /* Release granted quota to master if necessary */
2358                 qi->lqi_id.qid_uid = uid;
2359                 qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
2360
2361                 qi->lqi_id.qid_uid = gid;
2362                 qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
2363
2364                 qi->lqi_id.qid_uid = projid;
2365                 qsd_op_adjust(env, qsd, &qi->lqi_id, PRJQUOTA);
2366         }
2367 }
2368
2369 /*
2370  * Concurrency: ->loo_object_release() is called under site spin-lock.
2371  */
2372 static void osd_object_release(const struct lu_env *env,
2373                                struct lu_object *l)
2374 {
2375         struct osd_object *o = osd_obj(l);
2376
2377         /*
2378          * nobody should be releasing a non-destroyed object with nlink=0
2379          * the API allows this, but ldiskfs doesn't like and then report
2380          * this inode as deleted
2381          */
2382         LASSERT(!(o->oo_destroyed == 0 && o->oo_inode &&
2383                   o->oo_inode->i_nlink == 0));
2384 }
2385
2386 /*
2387  * Concurrency: shouldn't matter.
2388  */
2389 static int osd_object_print(const struct lu_env *env, void *cookie,
2390                             lu_printer_t p, const struct lu_object *l)
2391 {
2392         struct osd_object *o = osd_obj(l);
2393         struct iam_descr *d;
2394
2395         if (o->oo_dir != NULL)
2396                 d = o->oo_dir->od_container.ic_descr;
2397         else
2398                 d = NULL;
2399         return (*p)(env, cookie,
2400                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
2401                     o, o->oo_inode,
2402                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
2403                     o->oo_inode ? o->oo_inode->i_generation : 0,
2404                     d ? d->id_ops->id_name : "plain");
2405 }
2406
2407 /*
2408  * Concurrency: shouldn't matter.
2409  */
2410 int osd_statfs(const struct lu_env *env, struct dt_device *d,
2411                 struct obd_statfs *sfs, struct obd_statfs_info *info)
2412 {
2413         struct osd_device *osd = osd_dt_dev(d);
2414         struct super_block *sb = osd_sb(osd);
2415         struct kstatfs *ksfs;
2416         __u64 reserved;
2417         int result = 0;
2418
2419         if (unlikely(osd->od_mnt == NULL))
2420                 return -EINPROGRESS;
2421
2422         /* osd_lproc.c call this without env, allocate ksfs for that case */
2423         if (unlikely(env == NULL)) {
2424                 OBD_ALLOC_PTR(ksfs);
2425                 if (ksfs == NULL)
2426                         return -ENOMEM;
2427         } else {
2428                 ksfs = &osd_oti_get(env)->oti_ksfs;
2429         }
2430
2431         result = sb->s_op->statfs(sb->s_root, ksfs);
2432         if (result)
2433                 goto out;
2434
2435         statfs_pack(sfs, ksfs);
2436         if (unlikely(sb->s_flags & SB_RDONLY))
2437                 sfs->os_state |= OS_STATFS_READONLY;
2438
2439         sfs->os_state |= osd->od_nonrotational ? OS_STATFS_NONROT : 0;
2440
2441         if (ldiskfs_has_feature_extents(sb))
2442                 sfs->os_maxbytes = sb->s_maxbytes;
2443         else
2444                 sfs->os_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2445
2446         /*
2447          * Reserve some space so to avoid fragmenting the filesystem too much.
2448          * Fragmentation not only impacts performance, but can also increase
2449          * metadata overhead significantly, causing grant calculation to be
2450          * wrong.
2451          *
2452          * Reserve 0.78% of total space, at least 8MB for small filesystems.
2453          */
2454         BUILD_BUG_ON(OSD_STATFS_RESERVED <= LDISKFS_MAX_BLOCK_SIZE);
2455         reserved = OSD_STATFS_RESERVED >> sb->s_blocksize_bits;
2456         if (likely(sfs->os_blocks >= reserved << OSD_STATFS_RESERVED_SHIFT))
2457                 reserved = sfs->os_blocks >> OSD_STATFS_RESERVED_SHIFT;
2458
2459         sfs->os_blocks -= reserved;
2460         sfs->os_bfree  -= min(reserved, sfs->os_bfree);
2461         sfs->os_bavail -= min(reserved, sfs->os_bavail);
2462
2463 out:
2464         if (unlikely(env == NULL))
2465                 OBD_FREE_PTR(ksfs);
2466         return result;
2467 }
2468
2469 /**
2470  * Estimate space needed for file creations. We assume the largest filename
2471  * which is 2^64 - 1, hence a filename of 20 chars.
2472  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
2473  */
2474 #ifdef __LDISKFS_DIR_REC_LEN
2475 # define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
2476 #elif defined  LDISKFS_DIR_REC_LEN_WITH_DIR
2477 # define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20, NULL)
2478 #else
2479 # define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
2480 #endif
2481
2482 /*
2483  * Concurrency: doesn't access mutable data.
2484  */
2485 static void osd_conf_get(const struct lu_env *env,
2486                          const struct dt_device *dev,
2487                          struct dt_device_param *param)
2488 {
2489         struct osd_device *d = osd_dt_dev(dev);
2490         struct super_block *sb = osd_sb(d);
2491         struct blk_integrity *bi = bdev_get_integrity(sb->s_bdev);
2492         const char *name;
2493         int ea_overhead;
2494
2495         /*
2496          * XXX should be taken from not-yet-existing fs abstraction layer.
2497          */
2498         param->ddp_max_name_len = LDISKFS_NAME_LEN;
2499         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
2500         param->ddp_symlink_max  = sb->s_blocksize;
2501         param->ddp_mount_type   = LDD_MT_LDISKFS;
2502         if (ldiskfs_has_feature_extents(sb))
2503                 param->ddp_maxbytes = sb->s_maxbytes;
2504         else
2505                 param->ddp_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2506         /*
2507          * inode are statically allocated, so per-inode space consumption
2508          * is the space consumed by the directory entry
2509          */
2510         param->ddp_inodespace     = PER_OBJ_USAGE;
2511         /*
2512          * EXT_INIT_MAX_LEN is the theoretical maximum extent size (32k blocks
2513          * is 128MB) which is unlikely to be hit in real life. Report a smaller
2514          * maximum length to not under-count the actual number of extents
2515          * needed for writing a file if there are sub-optimal block allocations.
2516          */
2517         param->ddp_max_extent_blks = EXT_INIT_MAX_LEN >> 1;
2518         /* worst-case extent insertion metadata overhead */
2519         param->ddp_extent_tax = 6 * LDISKFS_BLOCK_SIZE(sb);
2520         param->ddp_mntopts = 0;
2521         if (test_opt(sb, XATTR_USER))
2522                 param->ddp_mntopts |= MNTOPT_USERXATTR;
2523         if (test_opt(sb, POSIX_ACL))
2524                 param->ddp_mntopts |= MNTOPT_ACL;
2525
2526         /*
2527          * LOD might calculate the max stripe count based on max_ea_size,
2528          * so we need take account in the overhead as well,
2529          * xattr_header + magic + xattr_entry_head
2530          */
2531         ea_overhead = sizeof(struct ldiskfs_xattr_header) + sizeof(__u32) +
2532                       LDISKFS_XATTR_LEN(XATTR_NAME_MAX_LEN);
2533
2534 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
2535         if (ldiskfs_has_feature_ea_inode(sb))
2536                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE -
2537                                                                 ea_overhead;
2538         else
2539 #endif
2540                 param->ddp_max_ea_size = sb->s_blocksize - ea_overhead;
2541
2542         if (param->ddp_max_ea_size > OBD_MAX_EA_SIZE)
2543                 param->ddp_max_ea_size = OBD_MAX_EA_SIZE;
2544
2545         /*
2546          * Preferred RPC size for efficient disk IO.  4MB shows good
2547          * all-around performance for ldiskfs, but use bigalloc chunk size
2548          * by default if larger.
2549          */
2550 #if defined(LDISKFS_CLUSTER_SIZE)
2551         if (LDISKFS_CLUSTER_SIZE(sb) > DT_DEF_BRW_SIZE)
2552                 param->ddp_brw_size = LDISKFS_CLUSTER_SIZE(sb);
2553         else
2554 #endif
2555                 param->ddp_brw_size = DT_DEF_BRW_SIZE;
2556
2557         param->ddp_t10_cksum_type = 0;
2558         if (bi) {
2559                 unsigned short interval = blk_integrity_interval(bi);
2560                 name = blk_integrity_name(bi);
2561                 /*
2562                  * Expected values:
2563                  * T10-DIF-TYPE1-CRC
2564                  * T10-DIF-TYPE2-CRC
2565                  * T10-DIF-TYPE3-CRC
2566                  * T10-DIF-TYPE1-IP
2567                  * T10-DIF-TYPE2-IP
2568                  * T10-DIF-TYPE3-IP
2569                  */
2570                 if (strncmp(name, "T10-DIF-TYPE",
2571                             sizeof("T10-DIF-TYPE") - 1) == 0) {
2572                         /* also skip "1/2/3-" at end */
2573                         const int type_off = sizeof("T10-DIF-TYPE.");
2574                         char type_number = name[type_off - 2];
2575
2576                         if (interval != 512 && interval != 4096) {
2577                                 CERROR("%s: unsupported T10PI sector size %u\n",
2578                                        d->od_svname, interval);
2579                                 goto out;
2580                         }
2581                         switch (type_number) {
2582                         case '1':
2583                                 d->od_t10_type = OSD_T10_TYPE1;
2584                                 break;
2585                         case '2':
2586                                 d->od_t10_type = OSD_T10_TYPE2;
2587                                 break;
2588                         case '3':
2589                                 d->od_t10_type = OSD_T10_TYPE3;
2590                                 break;
2591                         default:
2592                                 CERROR("%s: unsupported T10PI type %s\n",
2593                                        d->od_svname, name);
2594                                 goto out;
2595                         }
2596                         if (strcmp(name + type_off, "CRC") == 0) {
2597                                 d->od_t10_type |= OSD_T10_TYPE_CRC;
2598                                 param->ddp_t10_cksum_type = interval == 512 ?
2599                                         OBD_CKSUM_T10CRC512 :
2600                                         OBD_CKSUM_T10CRC4K;
2601                         } else if (strcmp(name + type_off, "IP") == 0) {
2602                                 d->od_t10_type |= OSD_T10_TYPE_IP;
2603                                 param->ddp_t10_cksum_type = interval == 512 ?
2604                                         OBD_CKSUM_T10IP512 :
2605                                         OBD_CKSUM_T10IP4K;
2606                         } else {
2607                                 CERROR("%s: unsupported checksum type of T10PI type '%s'\n",
2608                                        d->od_svname, name);
2609                                 d->od_t10_type = 0;
2610                         }
2611
2612                 } else {
2613                         CERROR("%s: unsupported T10PI type '%s'\n",
2614                                d->od_svname, name);
2615                 }
2616         }
2617
2618 out:
2619         param->ddp_has_lseek_data_hole = true;
2620 }
2621
2622 static struct vfsmount *osd_mnt_get(const struct dt_device *d)
2623 {
2624         return osd_dt_dev(d)->od_mnt;
2625 }
2626
2627 /*
2628  * Concurrency: shouldn't matter.
2629  */
2630 static int osd_sync(const struct lu_env *env, struct dt_device *d)
2631 {
2632         int rc;
2633         struct super_block *s = osd_sb(osd_dt_dev(d));
2634         ENTRY;
2635
2636         down_read(&s->s_umount);
2637         rc = s->s_op->sync_fs(s, 1);
2638         up_read(&s->s_umount);
2639
2640         CDEBUG(D_CACHE, "%s: synced OSD: rc = %d\n", osd_dt_dev(d)->od_svname,
2641                rc);
2642
2643         return rc;
2644 }
2645
2646 /**
2647  * Start commit for OSD device.
2648  *
2649  * An implementation of dt_commit_async method for OSD device.
2650  * Asychronously starts underlayng fs sync and thereby a transaction
2651  * commit.
2652  *
2653  * \param env environment
2654  * \param d dt device
2655  *
2656  * \see dt_device_operations
2657  */
2658 static int osd_commit_async(const struct lu_env *env,
2659                             struct dt_device *d)
2660 {
2661         struct super_block *s = osd_sb(osd_dt_dev(d));
2662         int rc;
2663
2664         ENTRY;
2665
2666         CDEBUG(D_HA, "%s: async commit OSD\n", osd_dt_dev(d)->od_svname);
2667         down_read(&s->s_umount);
2668         rc = s->s_op->sync_fs(s, 0);
2669         up_read(&s->s_umount);
2670
2671         RETURN(rc);
2672 }
2673
2674 /*
2675  * Concurrency: shouldn't matter.
2676  */
2677 static int osd_ro(const struct lu_env *env, struct dt_device *d)
2678 {
2679         struct super_block *sb = osd_sb(osd_dt_dev(d));
2680         struct block_device *dev = sb->s_bdev;
2681         int rc = -EOPNOTSUPP;
2682
2683         ENTRY;
2684
2685         CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
2686                osd_dt_dev(d)->od_svname, (long)dev, rc);
2687
2688         RETURN(rc);
2689 }
2690
2691 /**
2692  * Note: we do not count into QUOTA here.
2693  * If we mount with --data_journal we may need more.
2694  */
2695 const int osd_dto_credits_noquota[DTO_NR] = {
2696         /**
2697          * Insert.
2698          * INDEX_EXTRA_TRANS_BLOCKS(8) +
2699          * SINGLEDATA_TRANS_BLOCKS(8)
2700          * XXX Note: maybe iam need more, since iam have more level than
2701          *           EXT3 htree.
2702          */
2703         [DTO_INDEX_INSERT]  = 16,
2704         /**
2705          * Delete
2706          * just modify a single entry, probably merge few within a block
2707          */
2708         [DTO_INDEX_DELETE]  = 1,
2709         /**
2710          * Used for OI scrub
2711          */
2712         [DTO_INDEX_UPDATE]  = 16,
2713         /**
2714          * 4(inode, inode bits, groups, GDT)
2715          *   notice: OI updates are counted separately with DTO_INDEX_INSERT
2716          */
2717         [DTO_OBJECT_CREATE] = 4,
2718         /**
2719          * 4(inode, inode bits, groups, GDT)
2720          *   notice: OI updates are counted separately with DTO_INDEX_DELETE
2721          */
2722         [DTO_OBJECT_DELETE] = 4,
2723         /**
2724          * Attr set credits (inode)
2725          */
2726         [DTO_ATTR_SET_BASE] = 1,
2727         /**
2728          * Xattr set. The same as xattr of EXT3.
2729          * DATA_TRANS_BLOCKS(14)
2730          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
2731          * are also counted in. Do not know why?
2732          */
2733         [DTO_XATTR_SET]     = 14,
2734         /**
2735          * credits for inode change during write.
2736          */
2737         [DTO_WRITE_BASE]    = 3,
2738         /**
2739          * credits for single block write.
2740          */
2741         [DTO_WRITE_BLOCK]   = 14,
2742         /**
2743          * Attr set credits for chown.
2744          * This is extra credits for setattr, and it is null without quota
2745          */
2746         [DTO_ATTR_SET_CHOWN] = 0
2747 };
2748
2749 /* reserve or free quota for some operation */
2750 static int osd_reserve_or_free_quota(const struct lu_env *env,
2751                                      struct dt_device *dev,
2752                                      struct lquota_id_info *qi)
2753 {
2754         struct osd_device       *osd = osd_dt_dev(dev);
2755         struct qsd_instance     *qsd = NULL;
2756         int rc;
2757
2758         ENTRY;
2759
2760         if (qi->lqi_is_blk)
2761                 qsd = osd->od_quota_slave_dt;
2762         else
2763                 qsd = osd->od_quota_slave_md;
2764
2765         rc = qsd_reserve_or_free_quota(env, qsd, qi);
2766         RETURN(rc);
2767 }
2768
2769 static const struct dt_device_operations osd_dt_ops = {
2770         .dt_root_get              = osd_root_get,
2771         .dt_statfs                = osd_statfs,
2772         .dt_trans_create          = osd_trans_create,
2773         .dt_trans_start           = osd_trans_start,
2774         .dt_trans_stop            = osd_trans_stop,
2775         .dt_trans_cb_add          = osd_trans_cb_add,
2776         .dt_conf_get              = osd_conf_get,
2777         .dt_mnt_get               = osd_mnt_get,
2778         .dt_sync                  = osd_sync,
2779         .dt_ro                    = osd_ro,
2780         .dt_commit_async          = osd_commit_async,
2781         .dt_reserve_or_free_quota = osd_reserve_or_free_quota,
2782 };
2783
2784 static void osd_read_lock(const struct lu_env *env, struct dt_object *dt,
2785                           unsigned int role)
2786 {
2787         struct osd_object *obj = osd_dt_obj(dt);
2788         struct osd_thread_info *oti = osd_oti_get(env);
2789
2790         LINVRNT(osd_invariant(obj));
2791
2792         LASSERT(obj->oo_owner != env);
2793         down_read_nested(&obj->oo_sem, role);
2794
2795         LASSERT(obj->oo_owner == NULL);
2796         oti->oti_r_locks++;
2797 }
2798
2799 static void osd_write_lock(const struct lu_env *env, struct dt_object *dt,
2800                            unsigned int role)
2801 {
2802         struct osd_object *obj = osd_dt_obj(dt);
2803         struct osd_thread_info *oti = osd_oti_get(env);
2804
2805         LINVRNT(osd_invariant(obj));
2806
2807         LASSERT(obj->oo_owner != env);
2808         down_write_nested(&obj->oo_sem, role);
2809
2810         LASSERT(obj->oo_owner == NULL);
2811         obj->oo_owner = env;
2812         oti->oti_w_locks++;
2813 }
2814
2815 static void osd_read_unlock(const struct lu_env *env, struct dt_object *dt)
2816 {
2817         struct osd_object *obj = osd_dt_obj(dt);
2818         struct osd_thread_info *oti = osd_oti_get(env);
2819
2820         LINVRNT(osd_invariant(obj));
2821
2822         LASSERT(oti->oti_r_locks > 0);
2823         oti->oti_r_locks--;
2824         up_read(&obj->oo_sem);
2825 }
2826
2827 static void osd_write_unlock(const struct lu_env *env, struct dt_object *dt)
2828 {
2829         struct osd_object *obj = osd_dt_obj(dt);
2830         struct osd_thread_info *oti = osd_oti_get(env);
2831
2832         LINVRNT(osd_invariant(obj));
2833
2834         LASSERT(obj->oo_owner == env);
2835         LASSERT(oti->oti_w_locks > 0);
2836         oti->oti_w_locks--;
2837         obj->oo_owner = NULL;
2838         up_write(&obj->oo_sem);
2839 }
2840
2841 static int osd_write_locked(const struct lu_env *env, struct dt_object *dt)
2842 {
2843         struct osd_object *obj = osd_dt_obj(dt);
2844
2845         LINVRNT(osd_invariant(obj));
2846
2847         return obj->oo_owner == env;
2848 }
2849
2850 static void osd_inode_getattr(const struct lu_env *env,
2851                               struct inode *inode, struct lu_attr *attr)
2852 {
2853         attr->la_valid  |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
2854                            LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
2855                            LA_PROJID | LA_FLAGS | LA_NLINK | LA_RDEV |
2856                            LA_BLKSIZE | LA_TYPE | LA_BTIME;
2857
2858         attr->la_atime = inode->i_atime.tv_sec;
2859         attr->la_mtime = inode->i_mtime.tv_sec;
2860         attr->la_ctime = inode->i_ctime.tv_sec;
2861         attr->la_btime = LDISKFS_I(inode)->i_crtime.tv_sec;
2862         attr->la_mode    = inode->i_mode;
2863         attr->la_size    = i_size_read(inode);
2864         attr->la_blocks  = inode->i_blocks;
2865         attr->la_uid     = i_uid_read(inode);
2866         attr->la_gid     = i_gid_read(inode);
2867         attr->la_projid  = i_projid_read(inode);
2868         attr->la_flags   = ll_inode_to_ext_flags(inode->i_flags);
2869         attr->la_nlink   = inode->i_nlink;
2870         attr->la_rdev    = inode->i_rdev;
2871         attr->la_blksize = 1 << inode->i_blkbits;
2872         attr->la_blkbits = inode->i_blkbits;
2873         /*
2874          * Ext4 did not transfer inherit flags from raw inode
2875          * to inode flags, and ext4 internally test raw inode
2876          * @i_flags directly. Instead of patching ext4, we do it here.
2877          */
2878         if (LDISKFS_I(inode)->i_flags & LUSTRE_PROJINHERIT_FL)
2879                 attr->la_flags |= LUSTRE_PROJINHERIT_FL;
2880 }
2881
2882 static int osd_dirent_count(const struct lu_env *env, struct dt_object *dt,
2883                             u64 *count)
2884 {
2885         struct osd_object *obj = osd_dt_obj(dt);
2886         const struct dt_it_ops *iops;
2887         struct dt_it *it;
2888         int rc;
2889
2890         ENTRY;
2891
2892         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
2893         LASSERT(fid_is_namespace_visible(lu_object_fid(&obj->oo_dt.do_lu)));
2894
2895         if (obj->oo_dirent_count != LU_DIRENT_COUNT_UNSET) {
2896                 *count = obj->oo_dirent_count;
2897                 RETURN(0);
2898         }
2899
2900         /* directory not initialized yet */
2901         if (!dt->do_index_ops) {
2902                 *count = 0;
2903                 RETURN(0);
2904         }
2905
2906         iops = &dt->do_index_ops->dio_it;
2907         it = iops->init(env, dt, LUDA_64BITHASH);
2908         if (IS_ERR(it))
2909                 RETURN(PTR_ERR(it));
2910
2911         rc = iops->load(env, it, 0);
2912         if (rc < 0) {
2913                 if (rc == -ENODATA) {
2914                         rc = 0;
2915                         *count = 0;
2916                 }
2917                 GOTO(out, rc);
2918         }
2919         if (rc > 0)
2920                 rc = iops->next(env, it);
2921
2922         for (*count = 0; rc == 0 || rc == -ESTALE; rc = iops->next(env, it)) {
2923                 if (rc == -ESTALE)
2924                         continue;
2925
2926                 if (iops->key_size(env, it) == 0)
2927                         continue;
2928
2929                 (*count)++;
2930         }
2931         if (rc == 1) {
2932                 obj->oo_dirent_count = *count;
2933                 rc = 0;
2934         }
2935 out:
2936         iops->put(env, it);
2937         iops->fini(env, it);
2938
2939         RETURN(rc);
2940 }
2941
2942 static int osd_attr_get(const struct lu_env *env, struct dt_object *dt,
2943                         struct lu_attr *attr)
2944 {
2945         struct osd_object *obj = osd_dt_obj(dt);
2946         int rc = 0;
2947
2948         if (unlikely(!dt_object_exists(dt)))
2949                 return -ENOENT;
2950         if (unlikely(obj->oo_destroyed))
2951                 return -ENOENT;
2952
2953         LASSERT(!dt_object_remote(dt));
2954         LINVRNT(osd_invariant(obj));
2955
2956         spin_lock(&obj->oo_guard);
2957         osd_inode_getattr(env, obj->oo_inode, attr);
2958         if (obj->oo_lma_flags & LUSTRE_ORPHAN_FL) {
2959                 attr->la_valid |= LA_FLAGS;
2960                 attr->la_flags |= LUSTRE_ORPHAN_FL;
2961         }
2962         if (obj->oo_lma_flags & LUSTRE_ENCRYPT_FL) {
2963                 attr->la_valid |= LA_FLAGS;
2964                 attr->la_flags |= LUSTRE_ENCRYPT_FL;
2965         }
2966         spin_unlock(&obj->oo_guard);
2967
2968         if (S_ISDIR(obj->oo_inode->i_mode) &&
2969             fid_is_namespace_visible(lu_object_fid(&dt->do_lu)))
2970                 rc = osd_dirent_count(env, dt, &attr->la_dirent_count);
2971
2972         return rc;
2973 }
2974
2975 static int osd_declare_attr_qid(const struct lu_env *env,
2976                                 struct osd_object *obj,
2977                                 struct osd_thandle *oh, long long bspace,
2978                                 qid_t old_id, qid_t new_id, bool enforce,
2979                                 unsigned int type)
2980 {
2981         int rc;
2982         struct osd_thread_info *info = osd_oti_get(env);
2983         struct lquota_id_info  *qi = &info->oti_qi;
2984
2985         qi->lqi_type = type;
2986         /* inode accounting */
2987         qi->lqi_is_blk = false;
2988
2989         /* one more inode for the new id ... */
2990         qi->lqi_id.qid_uid = new_id;
2991         qi->lqi_space      = 1;
2992         /* Reserve credits for the new id */
2993         rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
2994         if (rc == -EDQUOT || rc == -EINPROGRESS)
2995                 rc = 0;
2996         if (rc)
2997                 RETURN(rc);
2998
2999         /* and one less inode for the current id */
3000         qi->lqi_id.qid_uid = old_id;
3001         qi->lqi_space = -1;
3002         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
3003         if (rc == -EDQUOT || rc == -EINPROGRESS)
3004                 rc = 0;
3005         if (rc)
3006                 RETURN(rc);
3007
3008         /* block accounting */
3009         qi->lqi_is_blk = true;
3010
3011         /* more blocks for the new id ... */
3012         qi->lqi_id.qid_uid = new_id;
3013         qi->lqi_space      = bspace;
3014         /*
3015          * Credits for the new uid has been reserved, re-use "obj"
3016          * to save credit reservation.
3017          */
3018         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
3019         if (rc == -EDQUOT || rc == -EINPROGRESS)
3020                 rc = 0;
3021         if (rc)
3022                 RETURN(rc);
3023
3024         /* and finally less blocks for the current uid */
3025         qi->lqi_id.qid_uid = old_id;
3026         qi->lqi_space      = -bspace;
3027         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
3028         if (rc == -EDQUOT || rc == -EINPROGRESS)
3029                 rc = 0;
3030
3031         RETURN(rc);
3032 }
3033
3034 static int osd_declare_attr_set(const struct lu_env *env,
3035                                 struct dt_object *dt,
3036                                 const struct lu_attr *attr,
3037                                 struct thandle *handle)
3038 {
3039         struct osd_thandle *oh;
3040         struct osd_object *obj;
3041         qid_t uid;
3042         qid_t gid;
3043         long long bspace;
3044         int rc = 0;
3045         bool enforce;
3046
3047         ENTRY;
3048
3049         LASSERT(dt != NULL);
3050         LASSERT(handle != NULL);
3051
3052         obj = osd_dt_obj(dt);
3053         LASSERT(osd_invariant(obj));
3054
3055         oh = container_of(handle, struct osd_thandle, ot_super);
3056         LASSERT(oh->ot_handle == NULL);
3057
3058         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
3059                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
3060
3061         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
3062                              osd_dto_credits_noquota[DTO_XATTR_SET]);
3063
3064         if (attr == NULL || obj->oo_inode == NULL)
3065                 RETURN(rc);
3066
3067         bspace   = obj->oo_inode->i_blocks << 9;
3068         bspace   = toqb(bspace);
3069
3070         /*
3071          * Changing ownership is always preformed by super user, it should not
3072          * fail with EDQUOT unless required explicitly.
3073          *
3074          * We still need to call the osd_declare_qid() to calculate the journal
3075          * credits for updating quota accounting files and to trigger quota
3076          * space adjustment once the operation is completed.
3077          */
3078         if (attr->la_valid & LA_UID || attr->la_valid & LA_GID) {
3079                 /* USERQUOTA */
3080                 uid = i_uid_read(obj->oo_inode);
3081                 enforce = (attr->la_valid & LA_UID) && (attr->la_uid != uid);
3082                 rc = osd_declare_attr_qid(env, obj, oh, bspace, uid,
3083                                           attr->la_uid, enforce, USRQUOTA);
3084                 if (rc)
3085                         RETURN(rc);
3086
3087                 gid = i_gid_read(obj->oo_inode);
3088                 CDEBUG(D_QUOTA, "declare uid %d -> %d gid %d -> %d\n", uid,
3089                        attr->la_uid, gid, attr->la_gid);
3090                 enforce = (attr->la_valid & LA_GID) && (attr->la_gid != gid);
3091                 rc = osd_declare_attr_qid(env, obj, oh, bspace, gid,
3092                                           attr->la_gid, enforce, GRPQUOTA);
3093                 if (rc)
3094                         RETURN(rc);
3095
3096         }
3097 #ifdef HAVE_PROJECT_QUOTA
3098         if (attr->la_valid & LA_PROJID) {
3099                 __u32 projid = i_projid_read(obj->oo_inode);
3100
3101                 enforce = (attr->la_valid & LA_PROJID) &&
3102                                         (attr->la_projid != projid);
3103                 rc = osd_declare_attr_qid(env, obj, oh, bspace,
3104                                           (qid_t)projid, (qid_t)attr->la_projid,
3105                                           enforce, PRJQUOTA);
3106                 if (rc)
3107                         RETURN(rc);
3108         }
3109 #endif
3110         /* punch must be aware we are dealing with an encrypted file */
3111         if (attr->la_valid & LA_FLAGS && attr->la_flags & LUSTRE_ENCRYPT_FL)
3112                 obj->oo_lma_flags |= LUSTRE_ENCRYPT_FL;
3113
3114         RETURN(rc);
3115 }
3116
3117 static int osd_inode_setattr(const struct lu_env *env,
3118                              struct inode *inode, const struct lu_attr *attr)
3119 {
3120         __u64 bits = attr->la_valid;
3121
3122         /* Only allow set size for regular file */
3123         if (!S_ISREG(inode->i_mode))
3124                 bits &= ~(LA_SIZE | LA_BLOCKS);
3125
3126         if (bits == 0)
3127                 return 0;
3128
3129         if (bits & LA_ATIME)
3130                 inode->i_atime = osd_inode_time(inode, attr->la_atime);
3131         if (bits & LA_CTIME)
3132                 inode->i_ctime = osd_inode_time(inode, attr->la_ctime);
3133         if (bits & LA_MTIME)
3134                 inode->i_mtime = osd_inode_time(inode, attr->la_mtime);
3135         if (bits & LA_SIZE) {
3136                 spin_lock(&inode->i_lock);
3137                 LDISKFS_I(inode)->i_disksize = attr->la_size;
3138                 i_size_write(inode, attr->la_size);
3139                 spin_unlock(&inode->i_lock);
3140         }
3141
3142         /*
3143          * OSD should not change "i_blocks" which is used by quota.
3144          * "i_blocks" should be changed by ldiskfs only.
3145          */
3146         if (bits & LA_MODE)
3147                 inode->i_mode = (inode->i_mode & S_IFMT) |
3148                                 (attr->la_mode & ~S_IFMT);
3149         if (bits & LA_UID)
3150                 i_uid_write(inode, attr->la_uid);
3151         if (bits & LA_GID)
3152                 i_gid_write(inode, attr->la_gid);
3153         if (bits & LA_PROJID)
3154                 i_projid_write(inode, attr->la_projid);
3155         if (bits & LA_NLINK)
3156                 set_nlink(inode, attr->la_nlink);
3157         if (bits & LA_RDEV)
3158                 inode->i_rdev = attr->la_rdev;
3159
3160         if (bits & LA_FLAGS) {
3161                 /* always keep S_NOCMTIME */
3162                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
3163                                  S_NOCMTIME;
3164 #if defined(S_ENCRYPTED)
3165                 /* Always remove S_ENCRYPTED, because ldiskfs must not be
3166                  * aware of encryption status. It is just stored into LMA
3167                  * so that it can be forwared to client side.
3168                  */
3169                 inode->i_flags &= ~S_ENCRYPTED;
3170 #endif
3171                 /*
3172                  * Ext4 did not transfer inherit flags from
3173                  * @inode->i_flags to raw inode i_flags when writing
3174                  * flags, we do it explictly here.
3175                  */
3176                 if (attr->la_flags & LUSTRE_PROJINHERIT_FL)
3177                         LDISKFS_I(inode)->i_flags |= LUSTRE_PROJINHERIT_FL;
3178                 else
3179                         LDISKFS_I(inode)->i_flags &= ~LUSTRE_PROJINHERIT_FL;
3180         }
3181         return 0;
3182 }
3183
3184 #ifdef HAVE_PROJECT_QUOTA
3185 static int osd_transfer_project(struct inode *inode, __u32 projid,
3186                                 struct thandle *handle)
3187 {
3188         struct super_block *sb = inode->i_sb;
3189         struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
3190         int err;
3191         kprojid_t kprojid;
3192         struct ldiskfs_iloc iloc;
3193         struct ldiskfs_inode *raw_inode;
3194         struct dquot *transfer_to[LDISKFS_MAXQUOTAS] = { };
3195
3196         if (!ldiskfs_has_feature_project(sb)) {
3197                 LASSERT(__kprojid_val(LDISKFS_I(inode)->i_projid)
3198                         == LDISKFS_DEF_PROJID);
3199                 if (projid != LDISKFS_DEF_PROJID)
3200                         return -EOPNOTSUPP;
3201                 else
3202                         return 0;
3203         }
3204
3205         if (LDISKFS_INODE_SIZE(sb) <= LDISKFS_GOOD_OLD_INODE_SIZE)
3206                 return -EOPNOTSUPP;
3207
3208         kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
3209         if (projid_eq(kprojid, LDISKFS_I(inode)->i_projid))
3210                 return 0;
3211
3212         err = ldiskfs_get_inode_loc(inode, &iloc);
3213         if (err)
3214                 return err;
3215
3216         raw_inode = ldiskfs_raw_inode(&iloc);
3217         if (!LDISKFS_FITS_IN_INODE(raw_inode, ei, i_projid)) {
3218                 struct osd_thandle *oh = container_of(handle,
3219                                                       struct osd_thandle,
3220                                                       ot_super);
3221                 /**
3222                  * try to expand inode size automatically.
3223                  */
3224                 ldiskfs_mark_inode_dirty(oh->ot_handle, inode);
3225                 if (!LDISKFS_FITS_IN_INODE(raw_inode, ei, i_projid)) {
3226                         err = -EOVERFLOW;
3227                         brelse(iloc.bh);
3228                         return err;
3229                 }
3230         }
3231         brelse(iloc.bh);
3232
3233         dquot_initialize(inode);
3234         transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
3235         if (transfer_to[PRJQUOTA]) {
3236                 lock_dquot_transfer(inode);
3237                 err = __dquot_transfer(inode, transfer_to);
3238                 unlock_dquot_transfer(inode);
3239                 dqput(transfer_to[PRJQUOTA]);
3240                 if (err)
3241                         return err;
3242         }
3243
3244         return err;
3245 }
3246 #endif
3247
3248 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr,
3249                               struct thandle *handle)
3250 {
3251         int rc;
3252
3253         if ((attr->la_valid & LA_UID && attr->la_uid != i_uid_read(inode)) ||
3254             (attr->la_valid & LA_GID && attr->la_gid != i_gid_read(inode))) {
3255                 struct iattr iattr;
3256
3257                 CDEBUG(D_QUOTA,
3258                        "executing dquot_transfer inode %ld uid %d -> %d gid %d -> %d\n",
3259                        inode->i_ino, i_uid_read(inode), attr->la_uid,
3260                        i_gid_read(inode), attr->la_gid);
3261
3262                 dquot_initialize(inode);
3263                 iattr.ia_valid = 0;
3264                 if (attr->la_valid & LA_UID)
3265                         iattr.ia_valid |= ATTR_UID;
3266                 if (attr->la_valid & LA_GID)
3267                         iattr.ia_valid |= ATTR_GID;
3268                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
3269                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
3270
3271                 lock_dquot_transfer(inode);
3272                 rc = osd_dquot_transfer(&nop_mnt_idmap, inode, &iattr);
3273                 unlock_dquot_transfer(inode);
3274                 if (rc) {
3275                         CERROR("%s: quota transfer failed. Is quota enforcement enabled on the ldiskfs filesystem? rc = %d\n",
3276                                osd_ino2name(inode), rc);
3277                         return rc;
3278                 }
3279         }
3280
3281         /* Handle project id transfer here properly */
3282         if (attr->la_valid & LA_PROJID &&
3283             attr->la_projid != i_projid_read(inode)) {
3284                 if (!projid_valid(make_kprojid(&init_user_ns, attr->la_projid)))
3285                         return -EINVAL;
3286 #ifdef HAVE_PROJECT_QUOTA
3287                 rc = osd_transfer_project(inode, attr->la_projid, handle);
3288 #else
3289                 rc = -ENOTSUPP;
3290 #endif
3291                 if (rc) {
3292                         CERROR("%s: quota transfer failed. Is project enforcement enabled on the ldiskfs filesystem? rc = %d\n",
3293                                osd_ino2name(inode), rc);
3294                         return rc;
3295                 }
3296         }
3297         return 0;
3298 }
3299
3300 static int osd_attr_set(const struct lu_env *env,
3301                         struct dt_object *dt,
3302                         const struct lu_attr *attr,
3303                         struct thandle *handle)
3304 {
3305         struct osd_thread_info *info = osd_oti_get(env);
3306         struct osd_object *obj = osd_dt_obj(dt);
3307         struct osd_device *osd = osd_obj2dev(obj);
3308         struct inode *inode;
3309         int rc;
3310
3311         if (!dt_object_exists(dt))
3312                 return -ENOENT;
3313
3314         LASSERT(handle != NULL);
3315         LASSERT(!dt_object_remote(dt));
3316         LASSERT(osd_invariant(obj));
3317
3318         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
3319
3320         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING) &&
3321             !osd_obj2dev(obj)->od_is_ost) {
3322                 struct osd_thread_info *oti = osd_oti_get(env);
3323                 const struct lu_fid *fid0 = lu_object_fid(&dt->do_lu);
3324                 struct lu_fid *fid1 = &oti->oti_fid;
3325                 struct osd_inode_id *id = &oti->oti_id;
3326                 struct iam_path_descr *ipd;
3327                 struct iam_container *bag;
3328                 struct osd_thandle *oh;
3329                 int rc;
3330
3331                 fid_cpu_to_be(fid1, fid0);
3332                 memset(id, 1, sizeof(*id));
3333                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
3334                                   fid0)->oi_dir.od_container;
3335                 ipd = osd_idx_ipd_get(env, bag);
3336                 if (unlikely(ipd == NULL))
3337                         RETURN(-ENOMEM);
3338
3339                 oh = container_of(handle, struct osd_thandle, ot_super);
3340                 rc = iam_update(oh->ot_handle, bag,
3341                                 (const struct iam_key *)fid1,
3342                                 (const struct iam_rec *)id, ipd);
3343                 osd_ipd_put(env, bag, ipd);
3344                 return(rc > 0 ? 0 : rc);
3345         }
3346
3347         inode = obj->oo_inode;
3348
3349         rc = osd_quota_transfer(inode, attr, handle);
3350         if (rc)
3351                 return rc;
3352
3353         spin_lock(&obj->oo_guard);
3354         rc = osd_inode_setattr(env, inode, attr);
3355         spin_unlock(&obj->oo_guard);
3356         if (rc != 0)
3357                 GOTO(out, rc);
3358
3359         osd_dirty_inode(inode, I_DIRTY_DATASYNC);
3360
3361         osd_trans_exec_check(env, handle, OSD_OT_ATTR_SET);
3362
3363         if (!(attr->la_valid & LA_FLAGS))
3364                 GOTO(out, rc);
3365
3366         /* If setting LUSTRE_ENCRYPT_FL on an OST object, also set a dummy
3367          * enc ctx xattr, with 2 benefits:
3368          * - setting the LL_XATTR_NAME_ENCRYPTION_CONTEXT xattr internally sets
3369          *   the LDISKFS_ENCRYPT_FL flag on the on-disk inode;
3370          * - it makes e2fsprogs happy to see an enc ctx for an inode that has
3371          *   the LDISKFS_ENCRYPT_FL flag
3372          * We do not need the actual encryption context on OST objects, it is
3373          * only stored on MDT inodes, at file creation time.
3374          */
3375         if (!(LDISKFS_I(obj->oo_inode)->i_flags & LDISKFS_ENCRYPT_FL) &&
3376             attr->la_flags & LUSTRE_ENCRYPT_FL && osd->od_is_ost &&
3377             !CFS_FAIL_CHECK(OBD_FAIL_LFSCK_NO_ENCFLAG)) {
3378                 struct lu_buf buf;
3379
3380                 /* use a dummy enc ctx, fine with e2fsprogs */
3381                 buf.lb_buf = "\xFF";
3382                 buf.lb_len = 1;
3383                 rc = osd_xattr_set(env, dt, &buf,
3384                                    LL_XATTR_NAME_ENCRYPTION_CONTEXT,
3385                                    0, handle);
3386                 if (rc)
3387                         CWARN("%s: set "DFID" enc ctx failed: rc = %d\n",
3388                               osd_name(osd), PFID(lu_object_fid(&dt->do_lu)),
3389                               rc);
3390         }
3391
3392         /* Let's check if there are extra flags need to be set into LMA */
3393         if (attr->la_flags & LUSTRE_LMA_FL_MASKS) {
3394                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
3395
3396                 LASSERT(!obj->oo_pfid_in_lma);
3397
3398                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
3399                                  &info->oti_ost_attrs);
3400                 if (rc)
3401                         GOTO(out, rc);
3402
3403                 if ((lma->lma_incompat & lustre_to_lma_flags(attr->la_flags)) ==
3404                     lustre_to_lma_flags(attr->la_flags))
3405                         /* if lma incompat already has the flags,
3406                          * save a useless call to xattr_set
3407                          */
3408                         GOTO(out, rc = 0);
3409
3410                 lma->lma_incompat |=
3411                         lustre_to_lma_flags(attr->la_flags);
3412                 lustre_lma_swab(lma);
3413
3414                 osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
3415
3416                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA,
3417                                      lma, sizeof(*lma), XATTR_REPLACE);
3418                 if (rc != 0)
3419                         CWARN("%s: set "DFID" lma flags %u failed: rc = %d\n",
3420                               osd_name(osd), PFID(lu_object_fid(&dt->do_lu)),
3421                               lma->lma_incompat, rc);
3422                 else
3423                         obj->oo_lma_flags =
3424                                 attr->la_flags & LUSTRE_LMA_FL_MASKS;
3425                 osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
3426         }
3427
3428 out:
3429         return rc;
3430 }
3431
3432 static struct dentry *osd_child_dentry_get(const struct lu_env *env,
3433                                            struct osd_object *obj,
3434                                            const char *name, const int namelen)
3435 {
3436         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
3437 }
3438
3439 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
3440                       umode_t mode, struct dt_allocation_hint *hint,
3441                       struct thandle *th, struct lu_attr *attr)
3442 {
3443         int result;
3444         struct osd_device *osd = osd_obj2dev(obj);
3445         struct osd_thandle *oth;
3446         struct dt_object *parent = NULL;
3447         struct inode *inode;
3448         struct iattr iattr = {
3449                 .ia_valid = ATTR_UID | ATTR_GID |
3450                             ATTR_CTIME | ATTR_MTIME | ATTR_ATIME,
3451                 .ia_ctime.tv_sec = attr->la_ctime,
3452                 .ia_mtime.tv_sec = attr->la_mtime,
3453                 .ia_atime.tv_sec = attr->la_atime,
3454                 .ia_uid = GLOBAL_ROOT_UID,
3455                 .ia_gid = GLOBAL_ROOT_GID,
3456         };
3457         const struct osd_timespec omit = { .tv_nsec = UTIME_OMIT };
3458
3459         if (attr->la_valid & LA_UID)
3460                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
3461         if (attr->la_valid & LA_GID)
3462                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
3463
3464         LINVRNT(osd_invariant(obj));
3465         LASSERT(obj->oo_inode == NULL);
3466         LASSERT(obj->oo_hl_head == NULL);
3467
3468         if (S_ISDIR(mode) && ldiskfs_pdo) {
3469                 obj->oo_hl_head =
3470                         ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
3471                 if (obj->oo_hl_head == NULL)
3472                         return -ENOMEM;
3473         }
3474
3475         oth = container_of(th, struct osd_thandle, ot_super);
3476         LASSERT(oth->ot_handle->h_transaction != NULL);
3477
3478         if (hint != NULL && hint->dah_parent != NULL &&
3479             !dt_object_remote(hint->dah_parent))
3480                 parent = hint->dah_parent;
3481
3482         /* if a time component is not valid set it to UTIME_OMIT */
3483         if (!(attr->la_valid & LA_CTIME))
3484                 iattr.ia_ctime = omit;
3485         if (!(attr->la_valid & LA_MTIME))
3486                 iattr.ia_mtime = omit;
3487         if (!(attr->la_valid & LA_ATIME))
3488                 iattr.ia_atime = omit;
3489
3490         inode = ldiskfs_create_inode(oth->ot_handle,
3491                                      parent ? osd_dt_obj(parent)->oo_inode :
3492                                               osd_sb(osd)->s_root->d_inode,
3493                                      mode, &iattr);
3494         if (!IS_ERR(inode)) {
3495                 /* Do not update file c/mtime in ldiskfs. */
3496                 inode->i_flags |= S_NOCMTIME;
3497
3498                 /*
3499                  * For new created object, it must be consistent,
3500                  * and it is unnecessary to scrub against it.
3501                  */
3502                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
3503
3504                 obj->oo_inode = inode;
3505                 result = 0;
3506         } else {
3507                 if (obj->oo_hl_head != NULL) {
3508                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
3509                         obj->oo_hl_head = NULL;
3510                 }
3511                 result = PTR_ERR(inode);
3512         }
3513         LINVRNT(osd_invariant(obj));
3514         return result;
3515 }
3516
3517 enum {
3518         OSD_NAME_LEN = 255
3519 };
3520
3521 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
3522                      struct lu_attr *attr,
3523                      struct dt_allocation_hint *hint,
3524                      struct dt_object_format *dof,
3525                      struct thandle *th)
3526 {
3527         int result;
3528         struct osd_thandle *oth;
3529         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX | S_ISGID));
3530
3531         LASSERT(S_ISDIR(attr->la_mode));
3532
3533         oth = container_of(th, struct osd_thandle, ot_super);
3534         LASSERT(oth->ot_handle->h_transaction != NULL);
3535         if (fid_is_namespace_visible(lu_object_fid(&obj->oo_dt.do_lu)))
3536                 obj->oo_dirent_count = 0;
3537         result = osd_mkfile(info, obj, mode, hint, th, attr);
3538
3539         return result;
3540 }
3541
3542 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
3543                         struct lu_attr *attr,
3544                         struct dt_allocation_hint *hint,
3545                         struct dt_object_format *dof,
3546                         struct thandle *th)
3547 {
3548         int result;
3549         struct osd_thandle *oth;
3550         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
3551
3552         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
3553
3554         LASSERT(S_ISREG(attr->la_mode));
3555
3556         oth = container_of(th, struct osd_thandle, ot_super);
3557         LASSERT(oth->ot_handle->h_transaction != NULL);
3558
3559         result = osd_mkfile(info, obj, mode, hint, th, attr);
3560         if (result == 0) {
3561                 LASSERT(obj->oo_inode != NULL);
3562                 if (feat->dif_flags & DT_IND_VARKEY)
3563                         result = iam_lvar_create(obj->oo_inode,
3564                                                  feat->dif_keysize_max,
3565                                                  feat->dif_ptrsize,
3566                                                  feat->dif_recsize_max,
3567                                                  oth->ot_handle);
3568                 else
3569                         result = iam_lfix_create(obj->oo_inode,
3570                                                  feat->dif_keysize_max,
3571                                                  feat->dif_ptrsize,
3572                                                  feat->dif_recsize_max,
3573                                                  oth->ot_handle);
3574         }
3575         return result;
3576 }
3577
3578 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
3579                      struct lu_attr *attr,
3580                      struct dt_allocation_hint *hint,
3581                      struct dt_object_format *dof,
3582                      struct thandle *th)
3583 {
3584         LASSERT(S_ISREG(attr->la_mode));
3585         return osd_mkfile(info, obj, (attr->la_mode &
3586                          (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th,
3587                           attr);
3588 }
3589
3590 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
3591                      struct lu_attr *attr,
3592                      struct dt_allocation_hint *hint,
3593                      struct dt_object_format *dof,
3594                      struct thandle *th)
3595 {
3596         LASSERT(S_ISLNK(attr->la_mode));
3597         return osd_mkfile(info, obj, (attr->la_mode &
3598                          (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th,
3599                           attr);
3600 }
3601
3602 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
3603                      struct lu_attr *attr,
3604                      struct dt_allocation_hint *hint,
3605                      struct dt_object_format *dof,
3606                      struct thandle *th)
3607 {
3608         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
3609         int result;
3610
3611         LINVRNT(osd_invariant(obj));
3612         LASSERT(obj->oo_inode == NULL);
3613         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
3614                 S_ISFIFO(mode) || S_ISSOCK(mode));
3615
3616         result = osd_mkfile(info, obj, mode, hint, th, attr);
3617         if (result == 0) {
3618                 LASSERT(obj->oo_inode != NULL);
3619                 /*
3620                  * This inode should be marked dirty for i_rdev.  Currently
3621                  * that is done in the osd_attr_init().
3622                  */
3623                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
3624                                    attr->la_rdev);
3625         }
3626         LINVRNT(osd_invariant(obj));
3627         return result;
3628 }
3629
3630 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
3631                               struct lu_attr *,
3632                               struct dt_allocation_hint *hint,
3633                               struct dt_object_format *dof,
3634                               struct thandle *);
3635
3636 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
3637 {
3638         osd_obj_type_f result;
3639
3640         switch (type) {
3641         case DFT_DIR:
3642                 result = osd_mkdir;
3643                 break;
3644         case DFT_REGULAR:
3645                 result = osd_mkreg;
3646                 break;
3647         case DFT_SYM:
3648                 result = osd_mksym;
3649                 break;
3650         case DFT_NODE:
3651                 result = osd_mknod;
3652                 break;
3653         case DFT_INDEX:
3654                 result = osd_mk_index;
3655                 break;
3656
3657         default:
3658                 LBUG();
3659                 break;
3660         }
3661         return result;
3662 }
3663
3664 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
3665                         struct dt_object *parent, struct dt_object *child,
3666                         umode_t child_mode)
3667 {
3668         LASSERT(ah);
3669
3670         ah->dah_parent = parent;
3671
3672         if (parent != NULL && !dt_object_remote(parent)) {
3673                 /* will help to find FID->ino at dt_insert("..") */
3674                 struct osd_object *pobj = osd_dt_obj(parent);
3675
3676                 osd_idc_find_and_init(env, osd_obj2dev(pobj), pobj);
3677         }
3678 }
3679
3680 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
3681                           struct lu_attr *attr, struct dt_object_format *dof,
3682                           struct thandle *handle)
3683 {
3684         struct inode *inode = obj->oo_inode;
3685         __u64 valid = attr->la_valid;
3686         int result;
3687
3688         attr->la_valid &= ~(LA_TYPE | LA_MODE);
3689
3690         if (dof->dof_type != DFT_NODE)
3691                 attr->la_valid &= ~LA_RDEV;
3692         if ((valid & LA_ATIME) && (attr->la_atime == inode->i_atime.tv_sec))
3693                 attr->la_valid &= ~LA_ATIME;
3694         if ((valid & LA_CTIME) && (attr->la_ctime == inode->i_ctime.tv_sec))
3695                 attr->la_valid &= ~LA_CTIME;
3696         if ((valid & LA_MTIME) && (attr->la_mtime == inode->i_mtime.tv_sec))
3697                 attr->la_valid &= ~LA_MTIME;
3698
3699         result = osd_quota_transfer(inode, attr, handle);
3700         if (result)
3701                 return;
3702
3703         if (attr->la_valid != 0) {
3704                 result = osd_inode_setattr(info->oti_env, inode, attr);
3705                 /*
3706                  * The osd_inode_setattr() should always succeed here.  The
3707                  * only error that could be returned is EDQUOT when we are
3708                  * trying to change the UID or GID of the inode. However, this
3709                  * should not happen since quota enforcement is no longer
3710                  * enabled on ldiskfs (lquota takes care of it).
3711                  */
3712                 LASSERTF(result == 0, "%d\n", result);
3713                 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
3714         }
3715
3716         attr->la_valid = valid;
3717 }
3718
3719 /**
3720  * Helper function for osd_create()
3721  *
3722  * \retval 0, on success
3723  */
3724 static int __osd_create(struct osd_thread_info *info, struct osd_object *obj,
3725                         struct lu_attr *attr, struct dt_allocation_hint *hint,
3726                         struct dt_object_format *dof, struct thandle *th)
3727 {
3728         int result;
3729         __u32 umask;
3730
3731         osd_trans_exec_op(info->oti_env, th, OSD_OT_CREATE);
3732
3733         /* we drop umask so that permissions we pass are not affected */
3734         umask = current->fs->umask;
3735         current->fs->umask = 0;
3736
3737         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
3738                                                   th);
3739         if (likely(obj->oo_inode != NULL)) {
3740                 LASSERT(obj->oo_inode->i_state & I_NEW);
3741
3742                 /*
3743                  * Unlock the inode before attr initialization to avoid
3744                  * unnecessary dqget operations. LU-6378
3745                  */
3746                 unlock_new_inode(obj->oo_inode);
3747         }
3748
3749         if (likely(result == 0)) {
3750                 osd_attr_init(info, obj, attr, dof, th);
3751                 osd_object_init0(obj);
3752         }
3753
3754         /* restore previous umask value */
3755         current->fs->umask = umask;
3756
3757         osd_trans_exec_check(info->oti_env, th, OSD_OT_CREATE);
3758
3759         return result;
3760 }
3761
3762 /**
3763  * Helper function for osd_create()
3764  *
3765  * \retval 0, on success
3766  */
3767 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
3768                            const struct lu_fid *fid, struct thandle *th)
3769 {
3770         struct osd_thread_info *info = osd_oti_get(env);
3771         struct osd_inode_id    *id   = &info->oti_id;
3772         struct osd_device      *osd  = osd_obj2dev(obj);
3773         struct osd_thandle     *oh;
3774         int rc;
3775
3776         LASSERT(obj->oo_inode != NULL);
3777
3778         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_OI_ENOSPC))
3779                 return -ENOSPC;
3780
3781         oh = container_of(th, struct osd_thandle, ot_super);
3782         LASSERT(oh->ot_handle);
3783         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3784
3785         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
3786         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_FID_REUSE) && osd->od_is_ost &&
3787             fid->f_oid) {
3788                 struct lu_fid tfid = *fid;
3789
3790                 tfid.f_oid--;
3791                 osd_oi_insert(info, osd, &tfid, id, oh->ot_handle,
3792                               OI_CHECK_FLD, NULL);
3793                 /* clear NOSCRUB flag so that it can be scrubbed immediately */
3794                 ldiskfs_clear_inode_state(obj->oo_inode,
3795                                           LDISKFS_STATE_LUSTRE_NOSCRUB);
3796                 rc = 0;
3797         } else {
3798                 rc = osd_oi_insert(info, osd, fid, id, oh->ot_handle,
3799                                    OI_CHECK_FLD, NULL);
3800         }
3801         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_DUPLICATE_MAP) && osd->od_is_ost) {
3802                 struct lu_fid next_fid = *fid;
3803
3804                 /* insert next object in advance, and map to the same inode */
3805                 next_fid.f_oid++;
3806                 if (next_fid.f_oid != 0) {
3807                         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3808                         osd_oi_insert(info, osd, &next_fid, id, oh->ot_handle,
3809                                       OI_CHECK_FLD, NULL);
3810                         osd_trans_exec_check(env, th, OSD_OT_INSERT);
3811                 }
3812         }
3813
3814         osd_trans_exec_check(env, th, OSD_OT_INSERT);
3815
3816         return rc;
3817 }
3818
3819 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
3820                    u64 seq, struct lu_seq_range *range)
3821 {
3822         struct seq_server_site *ss = osd_seq_site(osd);
3823
3824         if (fid_seq_is_idif(seq)) {
3825                 fld_range_set_ost(range);
3826                 range->lsr_index = idif_ost_idx(seq);
3827                 return 0;
3828         }
3829
3830         if (!fid_seq_in_fldb(seq)) {
3831                 fld_range_set_mdt(range);
3832                 if (ss != NULL)
3833                         /*
3834                          * FIXME: If ss is NULL, it suppose not get lsr_index
3835                          * at all
3836                          */
3837                         range->lsr_index = ss->ss_node_id;
3838                 return 0;
3839         }
3840
3841         LASSERT(ss != NULL);
3842         fld_range_set_any(range);
3843         /* OSD will only do local fld lookup */
3844         return fld_local_lookup(env, ss->ss_server_fld, seq, range);
3845 }
3846
3847 static int osd_declare_create(const struct lu_env *env, struct dt_object *dt,
3848                               struct lu_attr *attr,
3849                               struct dt_allocation_hint *hint,
3850                               struct dt_object_format *dof,
3851                               struct thandle *handle)
3852 {
3853         struct osd_thandle *oh;
3854         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
3855         int credits;
3856         int rc;
3857
3858         ENTRY;
3859
3860         LASSERT(handle != NULL);
3861
3862         oh = container_of(handle, struct osd_thandle, ot_super);
3863         LASSERT(oh->ot_handle == NULL);
3864
3865         if (osd_tx_was_declared(env, oh, dt, DTO_OBJECT_CREATE, 0))
3866                 RETURN(0);
3867
3868         /*
3869          * EA object consumes more credits than regular object: osd_mk_index
3870          * vs. osd_mkreg: osd_mk_index will create 2 blocks for root_node and
3871          * leaf_node, could involves the block, block bitmap, groups, GDT
3872          * change for each block, so add 4 * 2 credits in that case.
3873          *
3874          * The default ACL initialization may consume an additional 16 blocks
3875          */
3876         credits = osd_dto_credits_noquota[DTO_OBJECT_CREATE] +
3877                   ((dof->dof_type == DFT_INDEX) ? 4 * 2 : 0);
3878
3879         /**
3880          * While ldiskfs_new_inode() calls ldiskfs_init_acl() we have to add
3881          * credits for possible default ACL creation in new inode
3882          */
3883         if (hint && hint->dah_acl_len)
3884                 credits += osd_calc_bkmap_credits(sb, NULL, 0, -1,
3885                                 (hint->dah_acl_len + sb->s_blocksize - 1) >>
3886                                 sb->s_blocksize_bits);
3887
3888         osd_trans_declare_op(env, oh, OSD_OT_CREATE, credits);
3889
3890         /*
3891          * Reuse idle OI block may cause additional one OI block
3892          * to be changed.
3893          */
3894         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3895                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
3896         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_DUPLICATE_MAP))
3897                 osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3898                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
3899
3900         /* will help to find FID->ino mapping at dt_insert() */
3901         rc = osd_idc_find_and_init(env, osd_obj2dev(osd_dt_obj(dt)),
3902                                    osd_dt_obj(dt));
3903         if (rc != 0)
3904                 RETURN(rc);
3905
3906         if (!attr)
3907                 RETURN(0);
3908
3909         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid,
3910                                    attr->la_projid, 1, oh, osd_dt_obj(dt),
3911                                    NULL, OSD_QID_INODE);
3912         if (rc != 0)
3913                 RETURN(rc);
3914
3915         RETURN(rc);
3916 }
3917
3918 /**
3919  * Called to destroy on-disk representation of the object
3920  *
3921  * Concurrency: must be locked
3922  */
3923 static int osd_declare_destroy(const struct lu_env *env, struct dt_object *dt,
3924                                struct thandle *th)
3925 {
3926         struct osd_object *obj = osd_dt_obj(dt);
3927         struct inode *inode = obj->oo_inode;
3928         struct osd_thandle *oh;
3929         int rc;
3930
3931         ENTRY;
3932
3933         if (inode == NULL)
3934                 RETURN(-ENOENT);
3935
3936         oh = container_of(th, struct osd_thandle, ot_super);
3937         LASSERT(oh->ot_handle == NULL);
3938
3939         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
3940                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
3941
3942         /* For removing agent entry */
3943         if (lu_object_has_agent_entry(&obj->oo_dt.do_lu))
3944                 oh->ot_credits += osd_dto_credits_noquota[DTO_INDEX_DELETE];
3945
3946         /*
3947          * Recycle idle OI leaf may cause additional three OI blocks
3948          * to be changed.
3949          */
3950         if (!CFS_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3951                 osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3952                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
3953         /* one less inode */
3954         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3955                                    i_projid_read(inode), -1, oh, obj, NULL,
3956                                    OSD_QID_INODE);
3957         if (rc)
3958                 RETURN(rc);
3959         /* data to be truncated */
3960         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3961                                    i_projid_read(inode), 0, oh, obj, NULL,
3962                                    OSD_QID_BLK);
3963         if (rc)
3964                 RETURN(rc);
3965
3966         /*
3967          * will help to find FID->ino when this object is being
3968          * added to PENDING
3969          */
3970         rc = osd_idc_find_and_init(env, osd_obj2dev(obj), obj);
3971
3972         RETURN(rc);
3973 }
3974
3975 static int osd_destroy(const struct lu_env *env, struct dt_object *dt,
3976                        struct thandle *th)
3977 {
3978         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
3979         struct osd_object *obj = osd_dt_obj(dt);
3980         struct inode *inode = obj->oo_inode;
3981         struct osd_device *osd = osd_obj2dev(obj);
3982         struct osd_thandle *oh;
3983         int result;
3984
3985         ENTRY;
3986
3987         oh = container_of(th, struct osd_thandle, ot_super);
3988         LASSERT(oh->ot_handle);
3989         LASSERT(inode);
3990         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
3991
3992         if (unlikely(fid_is_acct(fid)))
3993                 RETURN(-EPERM);
3994
3995         if (lu_object_has_agent_entry(&obj->oo_dt.do_lu)) {
3996                 result = osd_delete_from_remote_parent(env, osd, obj, oh, true);
3997                 if (result != 0)
3998                         CERROR("%s: remove agent entry "DFID": rc = %d\n",
3999                                osd_name(osd), PFID(fid), result);
4000         }
4001
4002         if (S_ISDIR(inode->i_mode)) {
4003                 if (inode->i_nlink > 2)
4004                         CERROR("%s: directory "DFID" ino %lu link count is %u at unlink. run e2fsck to repair\n",
4005                                osd_name(osd), PFID(fid), inode->i_ino,
4006                                inode->i_nlink);
4007
4008                 spin_lock(&obj->oo_guard);
4009                 clear_nlink(inode);
4010                 spin_unlock(&obj->oo_guard);
4011                 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
4012         }
4013
4014         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
4015
4016         ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
4017
4018         if (!CFS_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
4019                 result = osd_oi_delete(osd_oti_get(env), osd, fid,
4020                                        oh->ot_handle, OI_CHECK_FLD);
4021
4022         osd_trans_exec_check(env, th, OSD_OT_DESTROY);
4023         /* XXX: add to ext3 orphan list */
4024         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
4025
4026         /* not needed in the cache anymore */
4027         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
4028         obj->oo_destroyed = 1;
4029
4030         RETURN(0);
4031 }
4032
4033 /**
4034  * Put the fid into lustre_mdt_attrs, and then place the structure
4035  * inode's ea. This fid should not be altered during the life time
4036  * of the inode.
4037  *
4038  * \retval +ve, on success
4039  * \retval -ve, on error
4040  *
4041  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
4042  */
4043 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
4044                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
4045 {
4046         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
4047         struct lustre_mdt_attrs *lma = &loa->loa_lma;
4048         int rc;
4049
4050         ENTRY;
4051
4052         if (CFS_FAIL_CHECK(OBD_FAIL_FID_INLMA))
4053                 RETURN(0);
4054
4055         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_OST_EA_FID_SET))
4056                 rc = -ENOMEM;
4057
4058         lustre_loa_init(loa, fid, compat, incompat);
4059         lustre_loa_swab(loa, false);
4060
4061         /*
4062          * For the OST device with 256 bytes inode size by default,
4063          * the PFID EA will be stored together with LMA EA to avoid
4064          * performance trouble. Otherwise the PFID EA can be stored
4065          * independently. LU-8998
4066          */
4067         if ((compat & LMAC_FID_ON_OST) &&
4068             LDISKFS_INODE_SIZE(inode->i_sb) <= 256)
4069                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
4070                                      sizeof(*loa), XATTR_CREATE);
4071         else
4072                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4073                                      sizeof(*lma), XATTR_CREATE);
4074         /*
4075          * LMA may already exist, but we need to check that all the
4076          * desired compat/incompat flags have been added.
4077          */
4078         if (unlikely(rc == -EEXIST)) {
4079                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
4080                                      XATTR_NAME_LMA, (void *)loa, sizeof(*loa));
4081                 if (rc < 0)
4082                         RETURN(rc);
4083
4084                 if (rc < sizeof(*lma))
4085                         RETURN(-EINVAL);
4086
4087                 lustre_loa_swab(loa, true);
4088                 if (lu_fid_eq(fid, &lma->lma_self_fid) &&
4089                     ((compat == 0 && incompat == 0) ||
4090                      (!(~lma->lma_compat & compat) &&
4091                       !(~lma->lma_incompat & incompat))))
4092                         RETURN(0);
4093
4094                 lma->lma_self_fid = *fid;
4095                 lma->lma_compat |= compat;
4096                 lma->lma_incompat |= incompat;
4097                 if (rc == sizeof(*lma)) {
4098                         lustre_lma_swab(lma);
4099                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4100                                              sizeof(*lma), XATTR_REPLACE);
4101                 } else {
4102                         lustre_loa_swab(loa, false);
4103                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
4104                                              sizeof(*loa), XATTR_REPLACE);
4105                 }
4106         }
4107
4108         RETURN(rc);
4109 }
4110
4111 /**
4112  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
4113  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
4114  * To have compatilibility with 1.8 ldiskfs driver we need to have
4115  * magic number at start of fid data.
4116  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
4117  * its inmemory API.
4118  */
4119 static void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
4120                                          const struct lu_fid *fid)
4121 {
4122         if (!fid_is_namespace_visible(fid) ||
4123             CFS_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
4124                 param->edp_magic = 0;
4125                 return;
4126         }
4127
4128         param->edp_magic = LDISKFS_LUFID_MAGIC;
4129         param->edp_len =  sizeof(struct lu_fid) + 1;
4130         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
4131 }
4132
4133 /**
4134  * Try to read the fid from inode ea into dt_rec.
4135  *
4136  * \param fid object fid.
4137  *
4138  * \retval 0 on success
4139  */
4140 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
4141                           __u32 ino, struct lu_fid *fid,
4142                           struct osd_inode_id *id)
4143 {
4144         struct osd_thread_info *info  = osd_oti_get(env);
4145         struct inode *inode;
4146
4147         ENTRY;
4148
4149         osd_id_gen(id, ino, OSD_OII_NOGEN);
4150         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
4151         if (IS_ERR(inode))
4152                 RETURN(PTR_ERR(inode));
4153
4154         iput(inode);
4155         RETURN(0);
4156 }
4157
4158 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
4159                                         struct inode *dir,
4160                                         struct inode *parent_dir,
4161                                         const struct lu_fid *dot_fid,
4162                                         const struct lu_fid *dot_dot_fid,
4163                                         struct osd_thandle *oth)
4164 {
4165         struct ldiskfs_dentry_param *dot_ldp;
4166         struct ldiskfs_dentry_param *dot_dot_ldp;
4167         __u32 saved_nlink = dir->i_nlink;
4168         int rc;
4169
4170         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_DOTDOT_ENOSPC))
4171                 return -ENOSPC;
4172
4173         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
4174         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
4175
4176         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
4177         dot_ldp->edp_magic = 0;
4178
4179         rc = ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
4180                                     dir, dot_ldp, dot_dot_ldp);
4181         /*
4182          * The ldiskfs_add_dot_dotdot() may dir->i_nlink as 2, then
4183          * the subseqent ref_add() will increase the dir->i_nlink
4184          * as 3. That is incorrect for new created directory.
4185          *
4186          * It looks like hack, because we want to make the OSD API
4187          * to be order-independent for new created directory object
4188          * between dt_insert(..) and ref_add() operations.
4189          *
4190          * Here, we only restore the in-RAM dir-inode's nlink attr,
4191          * becuase if the nlink attr is not 2, then there will be
4192          * ref_add() called following the dt_insert(..), such call
4193          * will make both the in-RAM and on-disk dir-inode's nlink
4194          * attr to be set as 2. LU-7447
4195          */
4196         set_nlink(dir, saved_nlink);
4197         return rc;
4198 }
4199
4200 /**
4201  * Create an local agent inode for remote entry
4202  */
4203 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
4204                                                   struct osd_device *osd,
4205                                                   struct osd_object *pobj,
4206                                                   const struct lu_fid *fid,
4207                                                   __u32 type,
4208                                                   struct thandle *th)
4209 {
4210         struct osd_thread_info *info = osd_oti_get(env);
4211         struct inode *local;
4212         struct osd_thandle *oh;
4213         struct iattr iattr = {
4214                 .ia_valid = ATTR_UID | ATTR_GID |
4215                             ATTR_CTIME | ATTR_MTIME | ATTR_ATIME,
4216                 .ia_ctime.tv_nsec = UTIME_OMIT,
4217                 .ia_mtime.tv_nsec = UTIME_OMIT,
4218                 .ia_atime.tv_nsec = UTIME_OMIT,
4219                 .ia_uid = GLOBAL_ROOT_UID,
4220                 .ia_gid = GLOBAL_ROOT_GID,
4221         };
4222         int rc;
4223
4224         ENTRY;
4225
4226         LASSERT(th);
4227         oh = container_of(th, struct osd_thandle, ot_super);
4228         LASSERT(oh->ot_handle->h_transaction != NULL);
4229
4230         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode,
4231                                      type, &iattr);
4232         if (IS_ERR(local)) {
4233                 CERROR("%s: create local error %d\n", osd_name(osd),
4234                        (int)PTR_ERR(local));
4235                 RETURN(local);
4236         }
4237
4238         /*
4239          * restore i_gid in case S_ISGID is set, we will inherit S_ISGID and set
4240          * correct gid on remote file, not agent here
4241          */
4242         local->i_gid = current_fsgid();
4243         ldiskfs_set_inode_state(local, LDISKFS_STATE_LUSTRE_NOSCRUB);
4244
4245         /* e2fsck doesn't like empty symlinks.  Store remote FID as symlink.
4246          * That gives e2fsck something to look at and be happy, and allows
4247          * debugging if we need to determine where this symlink came from.
4248          */
4249         if (S_ISLNK(type)) {
4250                 BUILD_BUG_ON(LDISKFS_N_BLOCKS * 4 < FID_LEN + 1);
4251                 ldiskfs_clear_inode_flag(local, LDISKFS_INODE_EXTENTS);
4252                 rc = scnprintf((char *)LDISKFS_I(local)->i_data,
4253                                LDISKFS_N_BLOCKS * 4, DFID, PFID(fid));
4254
4255                 i_size_write(local, rc);
4256                 LDISKFS_I(local)->i_disksize = rc;
4257         }
4258         unlock_new_inode(local);
4259
4260         /* Agent inode should not have project ID */
4261 #ifdef  HAVE_PROJECT_QUOTA
4262         if (LDISKFS_I(pobj->oo_inode)->i_flags & LUSTRE_PROJINHERIT_FL &&
4263             i_projid_read(pobj->oo_inode) != 0) {
4264                 rc = osd_transfer_project(local, 0, th);
4265                 if (rc) {
4266                         CERROR("%s: quota transfer failed:. Is project quota enforcement enabled on the ldiskfs filesystem? rc = %d\n",
4267                                osd_ino2name(local), rc);
4268                         RETURN(ERR_PTR(rc));
4269                 }
4270         }
4271 #endif
4272         /* Set special LMA flag for local agent inode */
4273         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
4274         if (rc != 0) {
4275                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
4276                        osd_name(osd), PFID(fid), rc);
4277                 RETURN(ERR_PTR(rc));
4278         }
4279
4280         if (!S_ISDIR(type))
4281                 RETURN(local);
4282
4283         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode, fid,
4284                                          lu_object_fid(&pobj->oo_dt.do_lu),
4285                                          oh);
4286         if (rc != 0) {
4287                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
4288                         osd_name(osd), PFID(fid), rc);
4289                 RETURN(ERR_PTR(rc));
4290         }
4291
4292         RETURN(local);
4293 }
4294
4295 /**
4296  * when direntry is deleted, we have to take care of possible agent inode
4297  * referenced by that. unfortunately we can't do this at that point:
4298  * iget() within a running transaction leads to deadlock and we better do
4299  * not call that every delete declaration to save performance. so we put
4300  * a potention agent inode on a list and process that once the transaction
4301  * is over. Notice it's not any worse in terms of real orphans as regular
4302  * object destroy doesn't put inodes on the on-disk orphan list. this should
4303  * be addressed separately
4304  */
4305 static int osd_schedule_agent_inode_removal(const struct lu_env *env,
4306                                             struct osd_thandle *oh,
4307                                             __u32 ino)
4308 {
4309         struct osd_device *osd = osd_dt_dev(oh->ot_super.th_dev);
4310         struct osd_obj_orphan *oor;
4311
4312         OBD_ALLOC_PTR(oor);
4313         if (oor == NULL)
4314                 return -ENOMEM;
4315
4316         oor->oor_ino = ino;
4317         oor->oor_env = (struct lu_env *)env;
4318         spin_lock(&osd->od_osfs_lock);
4319         list_add(&oor->oor_list, &osd->od_orphan_list);
4320         spin_unlock(&osd->od_osfs_lock);
4321
4322         oh->ot_remove_agents = 1;
4323
4324         return 0;
4325
4326 }
4327
4328 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
4329                                                 struct osd_device *osd)
4330 {
4331         struct osd_thread_info *info = osd_oti_get(env);
4332         struct osd_obj_orphan *oor, *tmp;
4333         struct osd_inode_id id;
4334         LIST_HEAD(list);
4335         struct inode *inode;
4336         struct lu_fid fid;
4337         handle_t *jh;
4338         __u32 ino;
4339
4340         spin_lock(&osd->od_osfs_lock);
4341         list_for_each_entry_safe(oor, tmp, &osd->od_orphan_list, oor_list) {
4342                 if (oor->oor_env == env)
4343                         list_move(&oor->oor_list, &list);
4344         }
4345         spin_unlock(&osd->od_osfs_lock);
4346
4347         list_for_each_entry_safe(oor, tmp, &list, oor_list) {
4348
4349                 ino = oor->oor_ino;
4350
4351                 list_del(&oor->oor_list);
4352                 OBD_FREE_PTR(oor);
4353
4354                 osd_id_gen(&id, ino, OSD_OII_NOGEN);
4355                 inode = osd_iget_fid(info, osd, &id, &fid);
4356                 if (IS_ERR(inode))
4357                         continue;
4358
4359                 if (!osd_remote_fid(env, osd, &fid)) {
4360                         iput(inode);
4361                         continue;
4362                 }
4363
4364                 jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC, 1);
4365                 clear_nlink(inode);
4366                 mark_inode_dirty(inode);
4367                 ldiskfs_journal_stop(jh);
4368                 iput(inode);
4369         }
4370
4371         return 0;
4372 }
4373
4374 /**
4375  * OSD layer object create function for OST objects (b=11826).
4376  *
4377  * The FID is inserted into inode xattr here.
4378  *
4379  * \retval   0, on success
4380  * \retval -ve, on error
4381  */
4382 static int osd_create(const struct lu_env *env, struct dt_object *dt,
4383                       struct lu_attr *attr, struct dt_allocation_hint *hint,
4384                       struct dt_object_format *dof, struct thandle *th)
4385 {
4386         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
4387         struct osd_object *obj = osd_dt_obj(dt);
4388         struct osd_thread_info *info = osd_oti_get(env);
4389         int result, on_ost = 0;
4390
4391         ENTRY;
4392
4393         if (dt_object_exists(dt))
4394                 RETURN(-EEXIST);
4395
4396         LINVRNT(osd_invariant(obj));
4397         LASSERT(!dt_object_remote(dt));
4398         LASSERT(osd_is_write_locked(env, obj));
4399         LASSERT(th != NULL);
4400
4401         if (unlikely(fid_is_acct(fid)))
4402                 /*
4403                  * Quota files can't be created from the kernel any more,
4404                  * 'tune2fs -O quota' will take care of creating them
4405                  */
4406                 RETURN(-EPERM);
4407
4408         result = __osd_create(info, obj, attr, hint, dof, th);
4409         if (result == 0) {
4410                 if (fid_is_idif(fid) &&
4411                     !osd_dev(dt->do_lu.lo_dev)->od_index_in_idif) {
4412                         struct lu_fid *tfid = &info->oti_fid;
4413                         struct ost_id *oi   = &info->oti_ostid;
4414
4415                         fid_to_ostid(fid, oi);
4416                         ostid_to_fid(tfid, oi, 0);
4417                         on_ost = 1;
4418                         result = osd_ea_fid_set(info, obj->oo_inode, tfid,
4419                                                 LMAC_FID_ON_OST, 0);
4420                 } else {
4421                         on_ost = fid_is_on_ost(info, osd_obj2dev(obj),
4422                                                fid, OI_CHECK_FLD);
4423                         result = osd_ea_fid_set(info, obj->oo_inode, fid,
4424                                                 on_ost ? LMAC_FID_ON_OST : 0,
4425                                                 0);
4426                 }
4427                 if (obj->oo_dt.do_body_ops == &osd_body_ops_new)
4428                         obj->oo_dt.do_body_ops = &osd_body_ops;
4429         }
4430
4431         if (!result && !CFS_FAIL_CHECK(OBD_FAIL_OSD_NO_OI_ENTRY)) {
4432                 struct inode *inode = obj->oo_inode;
4433
4434                 result = __osd_oi_insert(env, obj, fid, th);
4435                 if (result && inode) {
4436                         spin_lock(&obj->oo_guard);
4437                         clear_nlink(inode);
4438                         spin_unlock(&obj->oo_guard);
4439                         osd_dirty_inode(inode, I_DIRTY_DATASYNC);
4440                         ldiskfs_set_inode_state(inode,
4441                                                 LDISKFS_STATE_LUSTRE_DESTROY);
4442                         iput(inode);
4443                         obj->oo_inode = NULL;
4444                 }
4445         }
4446
4447         /*
4448          * a small optimization - dt_insert() isn't usually applied
4449          * to OST objects, so we don't need to cache OI mapping for
4450          * OST objects
4451          */
4452         if (result == 0 && on_ost == 0) {
4453                 struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
4454
4455                 result = osd_idc_find_and_init(env, osd, obj);
4456                 LASSERT(result == 0);
4457         }
4458
4459         LASSERT(ergo(result == 0,
4460                      dt_object_exists(dt) && !dt_object_remote(dt)));
4461         LINVRNT(osd_invariant(obj));
4462         RETURN(result);
4463 }
4464
4465 static int osd_declare_ref_add(const struct lu_env *env, struct dt_object *dt,
4466                                struct thandle *handle)
4467 {
4468         struct osd_thandle *oh;
4469         int rc;
4470
4471         /* it's possible that object doesn't exist yet */
4472         LASSERT(handle != NULL);
4473
4474         oh = container_of(handle, struct osd_thandle, ot_super);
4475         LASSERT(oh->ot_handle == NULL);
4476
4477         osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
4478                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
4479
4480         rc = osd_idc_find_and_init(env, osd_dev(dt->do_lu.lo_dev),
4481                                    osd_dt_obj(dt));
4482
4483         return rc;
4484 }
4485
4486 /*
4487  * Concurrency: @dt is write locked.
4488  */
4489 static int osd_ref_add(const struct lu_env *env, struct dt_object *dt,
4490                        struct thandle *th)
4491 {
4492         struct osd_object *obj = osd_dt_obj(dt);
4493         struct inode *inode = obj->oo_inode;
4494         struct osd_thandle *oh;
4495         int rc = 0;
4496
4497         if (!dt_object_exists(dt) || obj->oo_destroyed)
4498                 return -ENOENT;
4499
4500         LINVRNT(osd_invariant(obj));
4501         LASSERT(!dt_object_remote(dt));
4502         LASSERT(osd_is_write_locked(env, obj));
4503         LASSERT(th != NULL);
4504
4505         oh = container_of(th, struct osd_thandle, ot_super);
4506         LASSERT(oh->ot_handle != NULL);
4507
4508         osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
4509
4510         CDEBUG(D_INODE, DFID" increase nlink %d\n",
4511                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
4512         /*
4513          * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
4514          * (65000) subdirectories by storing "1" in i_nlink if the link count
4515          * would otherwise overflow. Directory tranversal tools understand
4516          * that (st_nlink == 1) indicates that the filesystem dose not track
4517          * hard links count on the directory, and will not abort subdirectory
4518          * scanning early once (st_nlink - 2) subdirs have been found.
4519          *
4520          * This also has to properly handle the case of inodes with nlink == 0
4521          * in case they are being linked into the PENDING directory
4522          */
4523         spin_lock(&obj->oo_guard);
4524         if (unlikely(inode->i_nlink == 0))
4525                 /* inc_nlink from 0 may cause WARN_ON */
4526                 set_nlink(inode, 1);
4527         else {
4528                 osd_ldiskfs_inc_count(oh->ot_handle, inode);
4529                 if (!S_ISDIR(inode->i_mode))
4530                         LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
4531         }
4532         spin_unlock(&obj->oo_guard);
4533
4534         osd_dirty_inode(inode, I_DIRTY_DATASYNC);
4535         LINVRNT(osd_invariant(obj));
4536
4537         osd_trans_exec_check(env, th, OSD_OT_REF_ADD);
4538
4539         return rc;
4540 }
4541
4542 static int osd_declare_ref_del(const struct lu_env *env, struct dt_object *dt,
4543                                struct thandle *handle)
4544 {
4545         struct osd_thandle *oh;
4546
4547         if (!dt_object_exists(dt))
4548                 return -ENOENT;
4549
4550         LASSERT(!dt_object_remote(dt));
4551         LASSERT(handle != NULL);
4552
4553         oh = container_of(handle, struct osd_thandle, ot_super);
4554         LASSERT(oh->ot_handle == NULL);
4555
4556         osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
4557                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
4558
4559         return 0;
4560 }
4561
4562 /*
4563  * Concurrency: @dt is write locked.
4564  */
4565 static int osd_ref_del(const struct lu_env *env, struct dt_object *dt,
4566                        struct thandle *th)
4567 {
4568         struct osd_object *obj = osd_dt_obj(dt);
4569         struct inode *inode = obj->oo_inode;
4570         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
4571         struct osd_thandle *oh;
4572
4573         if (!dt_object_exists(dt))
4574                 return -ENOENT;
4575
4576         LINVRNT(osd_invariant(obj));
4577         LASSERT(!dt_object_remote(dt));
4578         LASSERT(osd_is_write_locked(env, obj));
4579         LASSERT(th != NULL);
4580
4581         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_REF_DEL))
4582                 return -EIO;
4583
4584         oh = container_of(th, struct osd_thandle, ot_super);
4585         LASSERT(oh->ot_handle != NULL);
4586
4587         osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
4588
4589         spin_lock(&obj->oo_guard);
4590         /*
4591          * That can be result of upgrade from old Lustre version and
4592          * applied only to local files.  Just skip this ref_del call.
4593          * ext4_unlink() only treats this as a warning, don't LASSERT here.
4594          */
4595         if (inode->i_nlink == 0) {
4596                 CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
4597                              D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
4598                              ", maybe an upgraded file? (LU-3915)\n",
4599                              osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
4600                 spin_unlock(&obj->oo_guard);
4601                 return 0;
4602         }
4603
4604         CDEBUG(D_INODE, DFID" decrease nlink %d\n",
4605                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
4606
4607         osd_ldiskfs_dec_count(oh->ot_handle, inode);
4608         spin_unlock(&obj->oo_guard);
4609
4610         osd_dirty_inode(inode, I_DIRTY_DATASYNC);
4611         LINVRNT(osd_invariant(obj));
4612
4613         osd_trans_exec_check(env, th, OSD_OT_REF_DEL);
4614
4615         return 0;
4616 }
4617
4618 /*
4619  * Concurrency: @dt is read locked.
4620  */
4621 static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
4622                          struct lu_buf *buf, const char *name)
4623 {
4624         struct osd_object      *obj    = osd_dt_obj(dt);
4625         struct inode           *inode  = obj->oo_inode;
4626         struct osd_thread_info *info   = osd_oti_get(env);
4627         struct dentry          *dentry = &info->oti_obj_dentry;
4628         bool cache_xattr = false;
4629         int rc;
4630
4631         LASSERT(buf);
4632
4633         /* version get is not real XATTR but uses xattr API */
4634         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
4635                 dt_obj_version_t *ver = buf->lb_buf;
4636
4637                 /*
4638                  * for version we are just using xattr API but change inode
4639                  * field instead
4640                  */
4641                 if (buf->lb_len == 0)
4642                         return sizeof(dt_obj_version_t);
4643
4644                 if (buf->lb_len < sizeof(dt_obj_version_t))
4645                         return -ERANGE;
4646
4647                 CDEBUG(D_INODE, "Get version %#llx for inode %lu\n",
4648                        LDISKFS_I(inode)->i_fs_version, inode->i_ino);
4649
4650                 *ver = LDISKFS_I(inode)->i_fs_version;
4651
4652                 return sizeof(dt_obj_version_t);
4653         }
4654
4655         if (!dt_object_exists(dt))
4656                 return -ENOENT;
4657
4658         LASSERT(!dt_object_remote(dt));
4659         LASSERT(inode->i_op != NULL);
4660 #ifdef HAVE_IOP_XATTR
4661         LASSERT(inode->i_op->getxattr != NULL);
4662 #endif
4663
4664         if (strcmp(name, XATTR_NAME_LOV) == 0 ||
4665             strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0)
4666                 cache_xattr = true;
4667
4668         if (cache_xattr) {
4669                 rc = osd_oxc_get(obj, name, buf);
4670                 if (rc != -ENOENT)
4671                         return rc;
4672         }
4673
4674         if (strcmp(name, XATTR_NAME_FID) == 0 && obj->oo_pfid_in_lma) {
4675                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
4676                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
4677                 struct filter_fid *ff;
4678                 struct ost_layout *ol;
4679
4680                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
4681                 if (rc)
4682                         return rc;
4683
4684                 LASSERT(lma->lma_compat & LMAC_STRIPE_INFO);
4685
4686                 rc = sizeof(*ff);
4687                 if (buf->lb_len == 0 || !buf->lb_buf)
4688                         return rc;
4689
4690                 if (buf->lb_len < rc)
4691                         return -ERANGE;
4692
4693                 ff = buf->lb_buf;
4694                 ol = &ff->ff_layout;
4695                 ol->ol_stripe_count = cpu_to_le32(loa->loa_parent_fid.f_ver >>
4696                                                   PFID_STRIPE_IDX_BITS);
4697                 ol->ol_stripe_size = cpu_to_le32(loa->loa_stripe_size);
4698                 loa->loa_parent_fid.f_ver &= PFID_STRIPE_COUNT_MASK;
4699                 fid_cpu_to_le(&ff->ff_parent, &loa->loa_parent_fid);
4700                 if (lma->lma_compat & LMAC_COMP_INFO) {
4701                         ol->ol_comp_start = cpu_to_le64(loa->loa_comp_start);
4702                         ol->ol_comp_end = cpu_to_le64(loa->loa_comp_end);
4703                         ol->ol_comp_id = cpu_to_le32(loa->loa_comp_id);
4704                 } else {
4705                         ol->ol_comp_start = 0;
4706                         ol->ol_comp_end = 0;
4707                         ol->ol_comp_id = 0;
4708                 }
4709         } else {
4710                 /* Get enc context xattr directly from ldiskfs instead of going
4711                  * through the VFS, as there is no xattr handler for
4712                  * "encryption.".
4713                  */
4714                 if (strcmp(name, LL_XATTR_NAME_ENCRYPTION_CONTEXT) == 0)
4715                         rc = ldiskfs_xattr_get(inode,
4716                                           LDISKFS_XATTR_INDEX_ENCRYPTION,
4717                                           LDISKFS_XATTR_NAME_ENCRYPTION_CONTEXT,
4718                                           buf->lb_buf, buf->lb_len);
4719                 else
4720                         rc = __osd_xattr_get(inode, dentry, name,
4721                                              buf->lb_buf, buf->lb_len);
4722         }
4723
4724         if (cache_xattr) {
4725                 if (rc == -ENOENT || rc == -ENODATA)
4726                         osd_oxc_add(obj, name, NULL, 0);
4727                 else if (rc > 0 && buf->lb_buf != NULL)
4728                         osd_oxc_add(obj, name, buf->lb_buf, rc);
4729         }
4730
4731         return rc;
4732 }
4733
4734 static int osd_declare_xattr_set(const struct lu_env *env,
4735                                  struct dt_object *dt,
4736                                  const struct lu_buf *buf, const char *name,
4737                                  int fl, struct thandle *handle)
4738 {
4739         struct osd_thandle *oh;
4740         int credits = 0;
4741         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
4742
4743         LASSERT(handle != NULL);
4744
4745         oh = container_of(handle, struct osd_thandle, ot_super);
4746         LASSERT(oh->ot_handle == NULL);
4747
4748         if (strcmp(name, XATTR_NAME_LMA) == 0) {
4749                 /*
4750                  * For non-upgrading case, the LMA is set first and
4751                  * usually fit inode. But for upgrade case, the LMA
4752                  * may be in another separated EA block.
4753                  */
4754                 if (dt_object_exists(dt)) {
4755                         if (fl == LU_XATTR_REPLACE)
4756                                 credits = 1;
4757                         else
4758                                 goto upgrade;
4759                 }
4760         } else if (strcmp(name, XATTR_NAME_VERSION) == 0) {
4761                 credits = 1;
4762         } else if (strcmp(name, XATTR_NAME_FID) == 0) {
4763                 /* We may need to delete the old PFID EA. */
4764                 credits = LDISKFS_MAXQUOTAS_DEL_BLOCKS(sb);
4765                 if (fl == LU_XATTR_REPLACE)
4766                         credits += 1;
4767                 else
4768                         goto upgrade;
4769         } else {
4770                 /*
4771                  * If some name entry resides on remote MDT, then will create
4772                  * agent entry under remote parent. On the other hand, if the
4773                  * remote entry will be removed, then related agent entry may
4774                  * need to be removed from the remote parent. So there may be
4775                  * kinds of cases, let's declare enough credits. The credits
4776                  * for create agent entry is enough for remove case.
4777                  */
4778                 if (strcmp(name, XATTR_NAME_LINK) == 0) {
4779                         credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
4780                         if (dt_object_exists(dt))
4781                                 credits += 1; /* For updating LMA */
4782                 }
4783
4784 upgrade:
4785                 credits += osd_dto_credits_noquota[DTO_XATTR_SET];
4786
4787                 if (buf != NULL) {
4788                         ssize_t buflen;
4789
4790                         if (buf->lb_buf == NULL && dt_object_exists(dt)) {
4791                                 /*
4792                                  * learn xattr size from osd_xattr_get if
4793                                  * attribute has not been read yet
4794                                  */
4795                                 buflen = __osd_xattr_get(
4796                                     osd_dt_obj(dt)->oo_inode,
4797                                     &osd_oti_get(env)->oti_obj_dentry,
4798                                     name, NULL, 0);
4799                                 if (buflen < 0)
4800                                         buflen = 0;
4801                         } else {
4802                                 buflen = buf->lb_len;
4803                         }
4804
4805                         if (buflen > sb->s_blocksize) {
4806                                 credits += osd_calc_bkmap_credits(
4807                                     sb, NULL, 0, -1,
4808                                     (buflen + sb->s_blocksize - 1) >>
4809                                     sb->s_blocksize_bits);
4810                         }
4811                 }
4812                 /*
4813                  * xattr set may involve inode quota change, reserve credits for
4814                  * dquot_initialize()
4815                  */
4816                 credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
4817         }
4818
4819         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET, credits);
4820
4821         return 0;
4822 }
4823
4824 static int osd_xattr_set_pfid(const struct lu_env *env, struct osd_object *obj,
4825                               const struct lu_buf *buf, int fl,
4826                               struct thandle *handle)
4827 {
4828         struct osd_thread_info *info = osd_oti_get(env);
4829         struct dentry *dentry = &info->oti_obj_dentry;
4830         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
4831         struct lustre_mdt_attrs *lma = &loa->loa_lma;
4832         struct inode *inode = obj->oo_inode;
4833         struct filter_fid *ff = buf->lb_buf;
4834         struct ost_layout *ol = &ff->ff_layout;
4835         int flags = XATTR_REPLACE;
4836         int rc;
4837
4838         ENTRY;
4839
4840         if (buf->lb_len != sizeof(*ff) && buf->lb_len != sizeof(struct lu_fid))
4841                 RETURN(-EINVAL);
4842
4843         rc = osd_get_lma(info, inode, dentry, loa);
4844         if (rc == -ENODATA) {
4845                 /* Usually for upgarding from old device */
4846                 lustre_loa_init(loa, lu_object_fid(&obj->oo_dt.do_lu),
4847                                 LMAC_FID_ON_OST, 0);
4848                 flags = XATTR_CREATE;
4849         } else if (rc) {
4850                 RETURN(rc);
4851         }
4852
4853         if (!rc && lma->lma_compat & LMAC_STRIPE_INFO) {
4854                 if ((fl & LU_XATTR_CREATE) && !(fl & LU_XATTR_REPLACE))
4855                         RETURN(-EEXIST);
4856
4857                 if (LDISKFS_INODE_SIZE(inode->i_sb) > 256) {
4858                         /* Separate PFID EA from LMA */
4859                         lma->lma_compat &= ~(LMAC_STRIPE_INFO | LMAC_COMP_INFO);
4860                         lustre_lma_swab(lma);
4861                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4862                                              sizeof(*lma), XATTR_REPLACE);
4863                         if (!rc) {
4864                                 obj->oo_pfid_in_lma = 0;
4865                                 rc = LU_XATTR_CREATE;
4866                         }
4867
4868                         RETURN(rc);
4869                 }
4870         } else {
4871                 if (LDISKFS_INODE_SIZE(inode->i_sb) > 256)
4872                         RETURN(fl);
4873
4874                 /*
4875                  * Old client does not send stripe information,
4876                  * then store the PFID EA on disk separatedly.
4877                  */
4878                 if (unlikely(buf->lb_len == sizeof(struct lu_fid) ||
4879                              ol->ol_stripe_size == 0))
4880                         RETURN(fl);
4881
4882                 /* Remove old PFID EA entry firstly. */
4883                 dquot_initialize(inode);
4884                 rc = ll_vfs_removexattr(dentry, inode, XATTR_NAME_FID);
4885                 if (rc == -ENODATA) {
4886                         /* XATTR_NAME_FID is already absent */
4887                         rc = 0;
4888                 } else if (rc) {
4889                         RETURN(rc);
4890                 }
4891         }
4892
4893         fid_le_to_cpu(&loa->loa_parent_fid, &ff->ff_parent);
4894         if (likely(ol->ol_stripe_size != 0)) {
4895                 loa->loa_parent_fid.f_ver |= le32_to_cpu(ol->ol_stripe_count) <<
4896                                              PFID_STRIPE_IDX_BITS;
4897                 loa->loa_stripe_size = le32_to_cpu(ol->ol_stripe_size);
4898                 lma->lma_compat |= LMAC_STRIPE_INFO;
4899                 if (ol->ol_comp_id != 0) {
4900                         loa->loa_comp_id = le32_to_cpu(ol->ol_comp_id);
4901                         loa->loa_comp_start = le64_to_cpu(ol->ol_comp_start);
4902                         loa->loa_comp_end = le64_to_cpu(ol->ol_comp_end);
4903                         lma->lma_compat |= LMAC_COMP_INFO;
4904                 }
4905         }
4906
4907         lustre_loa_swab(loa, false);
4908
4909         /* Store the PFID EA inside LMA. */
4910         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa, sizeof(*loa),
4911                              flags);
4912         if (!rc)
4913                 obj->oo_pfid_in_lma = 1;
4914
4915         RETURN(rc);
4916 }
4917
4918 /*
4919  * In DNE environment, the object (in spite of regular file or directory)
4920  * and its name entry may reside on different MDTs. Under such case, we will
4921  * create an agent entry on the MDT where the object resides. The agent entry
4922  * references the object locally, that makes the object to be visible to the
4923  * userspace when mounted as 'ldiskfs' directly. Then the userspace tools,
4924  * such as 'tar' can handle the object properly.
4925  *
4926  * We handle the agent entry during set linkEA that is the common interface
4927  * for both regular file and directroy, can handle kinds of cases, such as
4928  * create/link/unlink/rename, and so on.
4929  *
4930  * NOTE: we can NOT do that when ea_{insert,delete} that is only for directory.
4931  *
4932  * XXX: There are two known issues:
4933  * 1. For one object, we will create at most one agent entry even if there
4934  *    may be more than one cross-MDTs hard links on the object. So the local
4935  *    e2fsck may claim that the object's nlink is larger than the name entries
4936  *    that reference such inode. And in further, the e2fsck will fix the nlink
4937  *    attribute to match the local references. Then it will cause the object's
4938  *    nlink attribute to be inconsistent with the global references. it is bad
4939  *    but not fatal. The ref_del() can handle the zero-referenced case. On the
4940  *    other hand, the global namespace LFSCK can repair the object's attribute
4941  *    according to the linkEA.
4942  * 2. There may be too many hard links on the object as to its linkEA overflow,
4943  *    then the linkEA entry for cross-MDTs reference may be discarded. If such
4944  *    case happened, then at this point, we do not know whether there are some
4945  *    cross-MDTs reference. But there are local references, it guarantees that
4946  *    object is visible to userspace when mounted as 'ldiskfs'. That is enough.
4947  */
4948 static int osd_xattr_handle_linkea(const struct lu_env *env,
4949                                    struct osd_device *osd,
4950                                    struct osd_object *obj,
4951                                    const struct lu_buf *buf,
4952                                    struct thandle *handle)
4953 {
4954         const struct lu_fid *fid = lu_object_fid(&obj->oo_dt.do_lu);
4955         struct lu_fid *tfid = &osd_oti_get(env)->oti_fid3;
4956         struct linkea_data ldata = { .ld_buf = (struct lu_buf *)buf };
4957         struct lu_name tmpname;
4958         struct osd_thandle *oh;
4959         int rc;
4960         bool remote = false;
4961
4962         ENTRY;
4963
4964         oh = container_of(handle, struct osd_thandle, ot_super);
4965         LASSERT(oh->ot_handle != NULL);
4966
4967         rc = linkea_init_with_rec(&ldata);
4968         if (!rc) {
4969                 linkea_first_entry(&ldata);
4970                 while (ldata.ld_lee != NULL && !remote) {
4971                         linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen,
4972                                             &tmpname, tfid);
4973                         if (osd_remote_fid(env, osd, tfid) > 0)
4974                                 remote = true;
4975                         else
4976                                 linkea_next_entry(&ldata);
4977                 }
4978         } else if (rc == -ENODATA) {
4979                 rc = 0;
4980         } else {
4981                 RETURN(rc);
4982         }
4983
4984         if (lu_object_has_agent_entry(&obj->oo_dt.do_lu) && !remote) {
4985                 rc = osd_delete_from_remote_parent(env, osd, obj, oh, false);
4986                 if (rc)
4987                         CERROR("%s: failed to remove agent entry for "DFID
4988                                ": rc = %d\n", osd_name(osd), PFID(fid), rc);
4989         } else if (!lu_object_has_agent_entry(&obj->oo_dt.do_lu) && remote) {
4990                 rc = osd_add_to_remote_parent(env, osd, obj, oh);
4991                 if (rc)
4992                         CERROR("%s: failed to create agent entry for "DFID
4993                                ": rc = %d\n", osd_name(osd), PFID(fid), rc);
4994         }
4995
4996         RETURN(rc);
4997 }
4998
4999 /*
5000  * Concurrency: @dt is write locked.
5001  */
5002 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
5003                          const struct lu_buf *buf, const char *name, int fl,
5004                          struct thandle *handle)
5005 {
5006         struct osd_object *obj = osd_dt_obj(dt);
5007         struct osd_device *osd = osd_obj2dev(obj);
5008         struct inode *inode = obj->oo_inode;
5009         struct osd_thread_info *info = osd_oti_get(env);
5010         int fs_flags = 0;
5011         int len;
5012         int rc;
5013
5014         ENTRY;
5015
5016         LASSERT(handle);
5017         LASSERT(buf);
5018
5019         /* version set is not real XATTR */
5020         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
5021                 dt_obj_version_t *version = buf->lb_buf;
5022
5023                 /*
5024                  * for version we are just using xattr API but change inode
5025                  * field instead
5026                  */
5027                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
5028
5029                 CDEBUG(D_INODE,
5030                        DFID" set version %#llx (old %#llx) for inode %lu\n",
5031                        PFID(lu_object_fid(&dt->do_lu)), *version,
5032                        LDISKFS_I(inode)->i_fs_version, inode->i_ino);
5033
5034                 LDISKFS_I(inode)->i_fs_version = *version;
5035                 /*
5036                  * Version is set after all inode operations are finished,
5037                  * so we should mark it dirty here
5038                  */
5039                 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
5040
5041                 RETURN(0);
5042         }
5043
5044         CDEBUG(D_INODE, DFID" set xattr '%s' with size %zu\n",
5045                PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
5046
5047         len = buf->lb_len;
5048         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
5049
5050         /*
5051          * For the OST device with 256 bytes inode size by default,
5052          * the PFID EA will be stored together with LMA EA to avoid
5053          * performance trouble. Otherwise the PFID EA can be stored
5054          * independently. LU-8998
5055          */
5056         if (strcmp(name, XATTR_NAME_FID) == 0 && osd->od_is_ost &&
5057             (LDISKFS_INODE_SIZE(inode->i_sb) <= 256 || obj->oo_pfid_in_lma)) {
5058                 LASSERT(buf->lb_buf);
5059
5060                 fl = osd_xattr_set_pfid(env, obj, buf, fl, handle);
5061                 if (fl <= 0)
5062                         RETURN(fl);
5063         } else if (strcmp(name, XATTR_NAME_LMV) == 0) {
5064                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
5065                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
5066
5067                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
5068                 if (rc)
5069                         RETURN(rc);
5070
5071                 lma->lma_incompat |= LMAI_STRIPED;
5072                 lustre_lma_swab(lma);
5073                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
5074                                      sizeof(*lma), XATTR_REPLACE);
5075                 if (rc != 0)
5076                         RETURN(rc);
5077         } else if (strcmp(name, XATTR_NAME_LINK) == 0) {
5078                 LASSERT(!osd->od_is_ost);
5079
5080                 rc = osd_xattr_handle_linkea(env, osd, obj, buf, handle);
5081                 if (rc)
5082                         RETURN(rc);
5083         }
5084
5085         if (fl & LU_XATTR_REPLACE)
5086                 fs_flags |= XATTR_REPLACE;
5087
5088         if (fl & LU_XATTR_CREATE)
5089                 fs_flags |= XATTR_CREATE;
5090
5091         if (strcmp(name, LL_XATTR_NAME_ENCRYPTION_CONTEXT) == 0) {
5092                 /* Set enc context xattr directly in ldiskfs instead of going
5093                  * through the VFS, as there is no xattr handler for
5094                  * "encryption.".
5095                  */
5096                 struct osd_thandle *oth = container_of(handle,
5097                                                        struct osd_thandle,
5098                                                        ot_super);
5099
5100                 if (!oth->ot_handle)
5101                         /* this should be already part of a transaction */
5102                         RETURN(-EPROTO);
5103
5104                 rc = ldiskfs_xattr_set_handle(oth->ot_handle, inode,
5105                                           LDISKFS_XATTR_INDEX_ENCRYPTION,
5106                                           LDISKFS_XATTR_NAME_ENCRYPTION_CONTEXT,
5107                                           buf->lb_buf, len, fs_flags);
5108         } else {
5109                 rc = __osd_xattr_set(info, inode, name,
5110                                      buf->lb_buf, len, fs_flags);
5111         }
5112         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
5113
5114         if (rc == 0 &&
5115             (strcmp(name, XATTR_NAME_LOV) == 0 ||
5116              strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
5117                 osd_oxc_add(obj, name, buf->lb_buf, buf->lb_len);
5118
5119         return rc;
5120 }
5121
5122 /*
5123  * Concurrency: @dt is read locked.
5124  */
5125 static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
5126                           const struct lu_buf *buf)
5127 {
5128         struct osd_object *obj = osd_dt_obj(dt);
5129         struct osd_device *dev = osd_obj2dev(obj);
5130         struct inode *inode = obj->oo_inode;
5131         struct osd_thread_info *info = osd_oti_get(env);
5132         struct dentry *dentry = &info->oti_obj_dentry;
5133         int rc;
5134
5135         if (!dt_object_exists(dt))
5136                 return -ENOENT;
5137
5138         LASSERT(!dt_object_remote(dt));
5139         LASSERT(inode->i_op != NULL);
5140         LASSERT(inode->i_op->listxattr != NULL);
5141
5142         dentry->d_inode = inode;
5143         dentry->d_sb = inode->i_sb;
5144         rc = inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
5145
5146         if (rc < 0 || buf->lb_buf == NULL)
5147                 return rc;
5148
5149         /* Hide virtual project ID xattr from list if disabled */
5150         if (!dev->od_enable_projid_xattr) {
5151                 char *end = (char *)buf->lb_buf + rc;
5152                 char *p = buf->lb_buf;
5153
5154                 while (p < end) {
5155                         char *next = p + strlen(p) + 1;
5156
5157                         if (strcmp(p, XATTR_NAME_PROJID) == 0) {
5158                                 if (end - next > 0)
5159                                         memmove(p, next, end - next);
5160                                 rc -= next - p;
5161                                 break;
5162                         }
5163
5164                         p = next;
5165                 }
5166         }
5167
5168         return rc;
5169 }
5170
5171 static int osd_declare_xattr_del(const struct lu_env *env,
5172                                  struct dt_object *dt, const char *name,
5173                                  struct thandle *handle)
5174 {
5175         struct osd_thandle *oh;
5176         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
5177
5178         LASSERT(!dt_object_remote(dt));
5179         LASSERT(handle != NULL);
5180
5181         oh = container_of(handle, struct osd_thandle, ot_super);
5182         LASSERT(oh->ot_handle == NULL);
5183
5184         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
5185                              osd_dto_credits_noquota[DTO_XATTR_SET]);
5186         /*
5187          * xattr del may involve inode quota change, reserve credits for
5188          * dquot_initialize()
5189          */
5190         oh->ot_credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
5191
5192         return 0;
5193 }
5194
5195 /*
5196  * Concurrency: @dt is write locked.
5197  */
5198 static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
5199                          const char *name, struct thandle *handle)
5200 {
5201         struct osd_object *obj = osd_dt_obj(dt);
5202         struct inode *inode = obj->oo_inode;
5203         struct osd_thread_info *info = osd_oti_get(env);
5204         struct dentry *dentry = &info->oti_obj_dentry;
5205         int rc;
5206
5207         if (!dt_object_exists(dt))
5208                 return -ENOENT;
5209
5210         LASSERT(!dt_object_remote(dt));
5211         LASSERT(inode->i_op != NULL);
5212         LASSERT(handle != NULL);
5213 #ifdef HAVE_IOP_XATTR
5214         LASSERT(inode->i_op->removexattr != NULL);
5215 #endif
5216
5217         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
5218
5219         if (strcmp(name, XATTR_NAME_FID) == 0 && obj->oo_pfid_in_lma) {
5220                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
5221
5222                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
5223                                  &info->oti_ost_attrs);
5224                 if (!rc) {
5225                         LASSERT(lma->lma_compat & LMAC_STRIPE_INFO);
5226
5227                         lma->lma_compat &= ~(LMAC_STRIPE_INFO | LMAC_COMP_INFO);
5228                         lustre_lma_swab(lma);
5229                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
5230                                              sizeof(*lma), XATTR_REPLACE);
5231                         if (!rc)
5232                                 obj->oo_pfid_in_lma = 0;
5233                 }
5234         } else {
5235                 dquot_initialize(inode);
5236                 dentry->d_inode = inode;
5237                 dentry->d_sb = inode->i_sb;
5238                 rc = ll_vfs_removexattr(dentry, inode, name);
5239         }
5240
5241         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
5242
5243         if (rc == 0 &&
5244             (strcmp(name, XATTR_NAME_LOV) == 0 ||
5245              strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
5246                 osd_oxc_del(obj, name);
5247
5248         return rc;
5249 }
5250
5251 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt,
5252                            __u64 start, __u64 end)
5253 {
5254         struct osd_object *obj = osd_dt_obj(dt);
5255         struct osd_device *dev = osd_obj2dev(obj);
5256         struct inode *inode = obj->oo_inode;
5257         struct file *file;
5258         int rc;
5259
5260         ENTRY;
5261         file = alloc_file_pseudo(inode, dev->od_mnt, "/", O_NOATIME,
5262                                  inode->i_fop);
5263         if (IS_ERR(file))
5264                 RETURN(PTR_ERR(file));
5265
5266         file->f_mode |= FMODE_64BITHASH;
5267         rc = vfs_fsync_range(file, start, end, 0);
5268         ihold(inode);
5269         fput(file);
5270
5271         RETURN(rc);
5272 }
5273
5274 static int osd_invalidate(const struct lu_env *env, struct dt_object *dt)
5275 {
5276         return 0;
5277 }
5278
5279 static bool osd_check_stale(struct dt_object *dt)
5280 {
5281         return false;
5282 }
5283 /*
5284  * Index operations.
5285  */
5286
5287 static int osd_iam_index_probe(const struct lu_env *env, struct osd_object *o,
5288                                const struct dt_index_features *feat)
5289 {
5290         struct iam_descr *descr;
5291
5292         if (osd_object_is_root(o))
5293                 return feat == &dt_directory_features;
5294
5295         LASSERT(o->oo_dir != NULL);
5296
5297         descr = o->oo_dir->od_container.ic_descr;
5298         if (feat == &dt_directory_features) {
5299                 if (descr->id_rec_size == sizeof(struct osd_fid_pack))
5300                         return 1;
5301                 else
5302                         return 0;
5303         } else {
5304                 return feat->dif_keysize_min <= descr->id_key_size &&
5305                        descr->id_key_size <= feat->dif_keysize_max &&
5306                        feat->dif_recsize_min <= descr->id_rec_size &&
5307                        descr->id_rec_size <= feat->dif_recsize_max &&
5308                        !(feat->dif_flags & (DT_IND_VARKEY |
5309                                             DT_IND_VARREC | DT_IND_NONUNQ)) &&
5310                        ergo(feat->dif_flags & DT_IND_UPDATE,
5311                             1 /* XXX check that object (and fs) is writable */);
5312         }
5313 }
5314
5315 static int osd_iam_container_init(const struct lu_env *env,
5316                                   struct osd_object *obj,
5317                                   struct osd_directory *dir)
5318 {
5319         struct iam_container *bag = &dir->od_container;
5320         int result;
5321
5322         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
5323         if (result != 0)
5324                 return result;
5325
5326         result = iam_container_setup(bag);
5327         if (result == 0)
5328                 obj->oo_dt.do_index_ops = &osd_index_iam_ops;
5329         else
5330                 iam_container_fini(bag);
5331
5332         return result;
5333 }
5334
5335
5336 /*
5337  * Concurrency: no external locking is necessary.
5338  */
5339 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
5340                          const struct dt_index_features *feat)
5341 {
5342         int result;
5343         int skip_iam = 0;
5344         struct osd_object *obj = osd_dt_obj(dt);
5345
5346         LINVRNT(osd_invariant(obj));
5347
5348         if (osd_object_is_root(obj)) {
5349                 dt->do_index_ops = &osd_index_ea_ops;
5350                 result = 0;
5351         } else if (feat == &dt_directory_features) {
5352                 dt->do_index_ops = &osd_index_ea_ops;
5353                 if (obj->oo_inode == NULL || S_ISDIR(obj->oo_inode->i_mode))
5354                         result = 0;
5355                 else
5356                         result = -ENOTDIR;
5357                 skip_iam = 1;
5358         } else if (unlikely(feat == &dt_otable_features)) {
5359                 dt->do_index_ops = &osd_otable_ops;
5360                 return 0;
5361         } else if (unlikely(feat == &dt_acct_features)) {
5362                 dt->do_index_ops = &osd_acct_index_ops;
5363                 result = 0;
5364                 skip_iam = 1;
5365         } else if (!osd_has_index(obj)) {
5366                 struct osd_directory *dir;
5367                 struct osd_device *osd = osd_obj2dev(obj);
5368                 const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
5369
5370                 OBD_ALLOC_PTR(dir);
5371                 if (dir) {
5372
5373                         spin_lock(&obj->oo_guard);
5374                         if (obj->oo_dir == NULL)
5375                                 obj->oo_dir = dir;
5376                         else
5377                                 /*
5378                                  * Concurrent thread allocated container data.
5379                                  */
5380                                 OBD_FREE_PTR(dir);
5381                         spin_unlock(&obj->oo_guard);
5382                         /*
5383                          * Now, that we have container data, serialize its
5384                          * initialization.
5385                          */
5386                         down_write(&obj->oo_ext_idx_sem);
5387                         /*
5388                          * recheck under lock.
5389                          */
5390
5391                         if (osd_has_index(obj)) {
5392                                 result = 0;
5393                                 goto unlock;
5394                         }
5395
5396                         result = osd_iam_container_init(env, obj, obj->oo_dir);
5397                         if (result || feat == &dt_lfsck_namespace_features ||
5398                             feat == &dt_lfsck_layout_orphan_features ||
5399                             feat == &dt_lfsck_layout_dangling_features)
5400                                 goto unlock;
5401
5402                         result = osd_index_register(osd, fid,
5403                                                     feat->dif_keysize_max,
5404                                                     feat->dif_recsize_max);
5405                         if (result < 0)
5406                                 CWARN("%s: failed to register index "
5407                                       DFID": rc = %d\n",
5408                                       osd_name(osd), PFID(fid), result);
5409                         else if (result > 0)
5410                                 result = 0;
5411                         else
5412                                 CDEBUG(D_LFSCK, "%s: index object "DFID
5413                                        " (%d/%d) registered\n",
5414                                        osd_name(osd), PFID(fid),
5415                                        (int)feat->dif_keysize_max,
5416                                        (int)feat->dif_recsize_max);
5417
5418 unlock:
5419                         up_write(&obj->oo_ext_idx_sem);
5420                 } else {
5421                         result = -ENOMEM;
5422                 }
5423         } else {
5424                 result = 0;
5425         }
5426
5427         if (result == 0 && skip_iam == 0) {
5428                 if (!osd_iam_index_probe(env, obj, feat))
5429                         result = -ENOTDIR;
5430         }
5431         LINVRNT(osd_invariant(obj));
5432
5433         return result;
5434 }
5435
5436 static int osd_otable_it_attr_get(const struct lu_env *env,
5437                                  struct dt_object *dt,
5438                                  struct lu_attr *attr)
5439 {
5440         attr->la_valid = 0;
5441         return 0;
5442 }
5443
5444 static const struct dt_object_operations osd_obj_ops = {
5445         .do_read_lock           = osd_read_lock,
5446         .do_write_lock          = osd_write_lock,
5447         .do_read_unlock         = osd_read_unlock,
5448         .do_write_unlock        = osd_write_unlock,
5449         .do_write_locked        = osd_write_locked,
5450         .do_attr_get            = osd_attr_get,
5451         .do_declare_attr_set    = osd_declare_attr_set,
5452         .do_attr_set            = osd_attr_set,
5453         .do_ah_init             = osd_ah_init,
5454         .do_declare_create      = osd_declare_create,
5455         .do_create              = osd_create,
5456         .do_declare_destroy     = osd_declare_destroy,
5457         .do_destroy             = osd_destroy,
5458         .do_index_try           = osd_index_try,
5459         .do_declare_ref_add     = osd_declare_ref_add,
5460         .do_ref_add             = osd_ref_add,
5461         .do_declare_ref_del     = osd_declare_ref_del,
5462         .do_ref_del             = osd_ref_del,
5463         .do_xattr_get           = osd_xattr_get,
5464         .do_declare_xattr_set   = osd_declare_xattr_set,
5465         .do_xattr_set           = osd_xattr_set,
5466         .do_declare_xattr_del   = osd_declare_xattr_del,
5467         .do_xattr_del           = osd_xattr_del,
5468         .do_xattr_list          = osd_xattr_list,
5469         .do_object_sync         = osd_object_sync,
5470         .do_invalidate          = osd_invalidate,
5471         .do_check_stale         = osd_check_stale,
5472 };
5473
5474 static const struct dt_object_operations osd_obj_otable_it_ops = {
5475         .do_attr_get    = osd_otable_it_attr_get,
5476         .do_index_try   = osd_index_try,
5477 };
5478
5479 static int osd_index_declare_iam_delete(const struct lu_env *env,
5480                                         struct dt_object *dt,
5481                                         const struct dt_key *key,
5482                                         struct thandle *handle)
5483 {
5484         struct osd_thandle *oh;
5485
5486         oh = container_of(handle, struct osd_thandle, ot_super);
5487         LASSERT(oh->ot_handle == NULL);
5488
5489         /* Recycle  may cause additional three blocks to be changed. */
5490         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
5491                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
5492
5493         return 0;
5494 }
5495
5496 /**
5497  *      delete a (key, value) pair from index \a dt specified by \a key
5498  *
5499  *      \param  dt      osd index object
5500  *      \param  key     key for index
5501  *      \param  rec     record reference
5502  *      \param  handle  transaction handler
5503  *
5504  *      \retval  0  success
5505  *      \retval -ve   failure
5506  */
5507 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
5508                                 const struct dt_key *key,
5509                                 struct thandle *handle)
5510 {
5511         struct osd_thread_info *oti = osd_oti_get(env);
5512         struct osd_object *obj = osd_dt_obj(dt);
5513         struct osd_thandle *oh;
5514         struct iam_path_descr *ipd;
5515         struct iam_container *bag = &obj->oo_dir->od_container;
5516         int rc;
5517
5518         ENTRY;
5519
5520         if (!dt_object_exists(dt))
5521                 RETURN(-ENOENT);
5522
5523         LINVRNT(osd_invariant(obj));
5524         LASSERT(!dt_object_remote(dt));
5525         LASSERT(bag->ic_object == obj->oo_inode);
5526         LASSERT(handle != NULL);
5527
5528         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
5529
5530         ipd = osd_idx_ipd_get(env, bag);
5531         if (unlikely(ipd == NULL))
5532                 RETURN(-ENOMEM);
5533
5534         oh = container_of(handle, struct osd_thandle, ot_super);
5535         LASSERT(oh->ot_handle != NULL);
5536         LASSERT(oh->ot_handle->h_transaction != NULL);
5537
5538         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
5539                 /* swab quota uid/gid provided by caller */
5540                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
5541                 key = (const struct dt_key *)&oti->oti_quota_id;
5542         }
5543
5544         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
5545         osd_ipd_put(env, bag, ipd);
5546         LINVRNT(osd_invariant(obj));
5547         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
5548         RETURN(rc);
5549 }
5550
5551 static int osd_index_declare_ea_delete(const struct lu_env *env,
5552                                        struct dt_object *dt,
5553                                        const struct dt_key *key,
5554                                        struct thandle *handle)
5555 {
5556         struct osd_thandle *oh;
5557         struct inode *inode;
5558         int rc, credits;
5559
5560         ENTRY;
5561
5562         LASSERT(!dt_object_remote(dt));
5563         LASSERT(handle != NULL);
5564
5565         oh = container_of(handle, struct osd_thandle, ot_super);
5566         LASSERT(oh->ot_handle == NULL);
5567
5568         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE];
5569         osd_trans_declare_op(env, oh, OSD_OT_DELETE, credits);
5570
5571         inode = osd_dt_obj(dt)->oo_inode;
5572         if (inode == NULL)
5573                 RETURN(-ENOENT);
5574
5575         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
5576                                    i_projid_read(inode), 0, oh, osd_dt_obj(dt),
5577                                    NULL, OSD_QID_BLK);
5578         RETURN(rc);
5579 }
5580
5581 static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
5582                                           struct dt_rec *fid)
5583 {
5584         struct osd_fid_pack *rec;
5585         int rc = -ENODATA;
5586
5587         if (de->file_type & LDISKFS_DIRENT_LUFID) {
5588                 rec = (struct osd_fid_pack *)(de->name + de->name_len + 1);
5589                 rc = osd_fid_unpack((struct lu_fid *)fid, rec);
5590                 if (rc == 0 && unlikely(!fid_is_sane((struct lu_fid *)fid)))
5591                         rc = -EINVAL;
5592         }
5593         return rc;
5594 }
5595
5596 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
5597                           const struct lu_fid *fid)
5598 {
5599         struct seq_server_site *ss = osd_seq_site(osd);
5600
5601         ENTRY;
5602
5603         /* FID seqs not in FLDB, must be local seq */
5604         if (unlikely(!fid_seq_in_fldb(fid_seq(fid))))
5605                 RETURN(0);
5606
5607         /*
5608          * If FLD is not being initialized yet, it only happens during the
5609          * initialization, likely during mgs initialization, and we assume
5610          * this is local FID.
5611          */
5612         if (ss == NULL || ss->ss_server_fld == NULL)
5613                 RETURN(0);
5614
5615         /* Only check the local FLDB here */
5616         if (osd_seq_exists(env, osd, fid_seq(fid)))
5617                 RETURN(0);
5618
5619         RETURN(1);
5620 }
5621
5622 static void osd_take_care_of_agent(const struct lu_env *env,
5623                                    struct osd_device *osd,
5624                                    struct osd_thandle *oh,
5625                                    struct ldiskfs_dir_entry_2 *de)
5626 {
5627         struct lu_fid *fid = &osd_oti_get(env)->oti_fid;
5628         struct osd_idmap_cache *idc;
5629         int rc, schedule = 0;
5630
5631         LASSERT(de != NULL);
5632
5633         rc = osd_get_fid_from_dentry(de, (struct dt_rec *)fid);
5634         if (likely(rc == 0)) {
5635                 idc = osd_idc_find_or_init(env, osd, fid);
5636                 if (IS_ERR(idc) || idc->oic_remote)
5637                         schedule = 1;
5638         } else if (rc == -ENODATA) {
5639                 /*
5640                  * can't get FID, postpone to the end of the
5641                  * transaction when iget() is safe
5642                  */
5643                 schedule = 1;
5644         } else {
5645                 CERROR("%s: can't get FID: rc = %d\n", osd_name(osd), rc);
5646         }
5647         if (schedule)
5648                 osd_schedule_agent_inode_removal(env, oh,
5649                                                  le32_to_cpu(de->inode));
5650 }
5651
5652 /**
5653  * Utility function to get real name from object name
5654  *
5655  * \param[in] obj      pointer to the object to be handled
5656  * \param[in] name     object name
5657  * \param[in] len      object name len
5658  * \param[out]ln       pointer to the struct lu_name to hold the real name
5659  *
5660  * If file is not encrypted, real name is just the object name.
5661  * If file is encrypted, object name needs to be decoded. In
5662  * this case a new buffer is allocated, and ln->ln_name needs to be freed by
5663  * the caller.
5664  *
5665  * \retval   0, on success
5666  * \retval -ve, on error
5667  */
5668 static int obj_name2lu_name(struct osd_object *obj, const char *name,
5669                             int len, struct lu_name *ln)
5670 {
5671         if (!(obj->oo_lma_flags & LUSTRE_ENCRYPT_FL)) {
5672                 ln->ln_name = name;
5673                 ln->ln_namelen = len;
5674         } else {
5675                 char *buf = kmalloc(len, GFP_NOFS);
5676
5677                 if (!buf)
5678                         return -ENOMEM;
5679
5680                 len = critical_decode(name, len, buf);
5681                 ln->ln_name = buf;
5682                 ln->ln_namelen = len;
5683         }
5684
5685         return 0;
5686 }
5687
5688 /**
5689  * Index delete function for interoperability mode (b11826).
5690  * It will remove the directory entry added by osd_index_ea_insert().
5691  * This entry is needed to maintain name->fid mapping.
5692  *
5693  * \param key,  key i.e. file entry to be deleted
5694  *
5695  * \retval   0, on success
5696  * \retval -ve, on error
5697  */
5698 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
5699                                const struct dt_key *key, struct thandle *handle)
5700 {
5701         struct osd_object *obj = osd_dt_obj(dt);
5702         struct inode *dir = obj->oo_inode;
5703         struct dentry *dentry;
5704         struct osd_thandle *oh;
5705         struct ldiskfs_dir_entry_2 *de = NULL;
5706         struct buffer_head *bh;
5707         struct htree_lock *hlock = NULL;
5708         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
5709         struct lu_name ln;
5710         int rc;
5711
5712         ENTRY;
5713
5714         if (!dt_object_exists(dt))
5715                 RETURN(-ENOENT);
5716
5717         LINVRNT(osd_invariant(obj));
5718         LASSERT(!dt_object_remote(dt));
5719         LASSERT(handle != NULL);
5720
5721         rc = obj_name2lu_name(obj, (char *)key, strlen((char *)key), &ln);
5722         if (rc)
5723                 RETURN(rc);
5724
5725         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
5726
5727         oh = container_of(handle, struct osd_thandle, ot_super);
5728         LASSERT(oh->ot_handle != NULL);
5729         LASSERT(oh->ot_handle->h_transaction != NULL);
5730
5731         dquot_initialize(dir);
5732         dentry = osd_child_dentry_get(env, obj, ln.ln_name, ln.ln_namelen);
5733
5734         if (obj->oo_hl_head != NULL) {
5735                 hlock = osd_oti_get(env)->oti_hlock;
5736                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
5737                                    dir, LDISKFS_HLOCK_DEL);
5738         } else {
5739                 down_write(&obj->oo_ext_idx_sem);
5740         }
5741
5742         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
5743         if (!IS_ERR(bh)) {
5744                 /*
5745                  * If this is not the ".." entry, it might be a remote DNE
5746                  * entry and  we need to check if the FID is for a remote
5747                  * MDT.  If the FID is  not in the directory entry (e.g.
5748                  * upgraded 1.8 filesystem without dirdata enabled) then
5749                  * we need to get the FID from the LMA. For a remote directory
5750                  * there HAS to be an LMA, it cannot be an IGIF inode in this
5751                  * case.
5752                  *
5753                  * Delete the entry before the agent inode in order to
5754                  * simplify error handling.  At worst an error after deleting
5755                  * the entry first might leak the agent inode afterward. The
5756                  * reverse would need filesystem abort in case of error deleting
5757                  * the entry after the agent had been removed, or leave a
5758                  * dangling entry pointing at a random inode.
5759                  */
5760                 if (strcmp((char *)key, dotdot) != 0)
5761                         osd_take_care_of_agent(env, osd, oh, de);
5762                 rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
5763                 brelse(bh);
5764         } else {
5765                 rc = PTR_ERR(bh);
5766         }
5767
5768         if (!rc && fid_is_namespace_visible(lu_object_fid(&dt->do_lu)) &&
5769             obj->oo_dirent_count != LU_DIRENT_COUNT_UNSET) {
5770                 /* NB, dirent count may not be accurate, because it's counted
5771                  * without lock.
5772                  */
5773                 if (obj->oo_dirent_count)
5774                         obj->oo_dirent_count--;
5775                 else
5776                         obj->oo_dirent_count = LU_DIRENT_COUNT_UNSET;
5777         }
5778         if (hlock != NULL)
5779                 ldiskfs_htree_unlock(hlock);
5780         else
5781                 up_write(&obj->oo_ext_idx_sem);
5782         GOTO(out, rc);
5783 out:
5784         LASSERT(osd_invariant(obj));
5785         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
5786         if (ln.ln_name != (char *)key)
5787                 kfree(ln.ln_name);
5788         RETURN(rc);
5789 }
5790
5791 /**
5792  *      Lookup index for \a key and copy record to \a rec.
5793  *
5794  *      \param  dt      osd index object
5795  *      \param  key     key for index
5796  *      \param  rec     record reference
5797  *
5798  *      \retval  +ve  success : exact mach
5799  *      \retval  0    return record with key not greater than \a key
5800  *      \retval -ve   failure
5801  */
5802 static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
5803                                 struct dt_rec *rec, const struct dt_key *key)
5804 {
5805         struct osd_object *obj = osd_dt_obj(dt);
5806         struct iam_path_descr *ipd;
5807         struct iam_container *bag = &obj->oo_dir->od_container;
5808         struct osd_thread_info *oti = osd_oti_get(env);
5809         struct iam_iterator *it = &oti->oti_idx_it;
5810         struct iam_rec *iam_rec;
5811         int rc;
5812
5813         ENTRY;
5814
5815         if (!dt_object_exists(dt))
5816                 RETURN(-ENOENT);
5817
5818         LASSERT(osd_invariant(obj));
5819         LASSERT(!dt_object_remote(dt));
5820         LASSERT(bag->ic_object == obj->oo_inode);
5821
5822         ipd = osd_idx_ipd_get(env, bag);
5823         if (IS_ERR(ipd))
5824                 RETURN(-ENOMEM);
5825
5826         /* got ipd now we can start iterator. */
5827         iam_it_init(it, bag, 0, ipd);
5828
5829         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
5830                 /* swab quota uid/gid provided by caller */
5831                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
5832                 key = (const struct dt_key *)&oti->oti_quota_id;
5833         }
5834
5835         rc = iam_it_get(it, (struct iam_key *)key);
5836         if (rc >= 0) {
5837                 if (S_ISDIR(obj->oo_inode->i_mode))
5838                         iam_rec = (struct iam_rec *)oti->oti_ldp;
5839                 else
5840                         iam_rec = (struct iam_rec *)rec;
5841
5842                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)iam_rec);
5843
5844                 if (S_ISDIR(obj->oo_inode->i_mode))
5845                         osd_fid_unpack((struct lu_fid *)rec,
5846                                        (struct osd_fid_pack *)iam_rec);
5847                 else if (fid_is_quota(lu_object_fid(&dt->do_lu)))
5848                         osd_quota_unpack(obj, rec);
5849         }
5850
5851         iam_it_put(it);
5852         iam_it_fini(it);
5853         osd_ipd_put(env, bag, ipd);
5854
5855         LINVRNT(osd_invariant(obj));
5856
5857         RETURN(rc);
5858 }
5859
5860 static int osd_index_declare_iam_insert(const struct lu_env *env,
5861                                         struct dt_object *dt,
5862                                         const struct dt_rec *rec,
5863                                         const struct dt_key *key,
5864                                         struct thandle *handle)
5865 {
5866         struct osd_thandle *oh;
5867
5868         LASSERT(handle != NULL);
5869
5870         oh = container_of(handle, struct osd_thandle, ot_super);
5871         LASSERT(oh->ot_handle == NULL);
5872
5873         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
5874                              osd_dto_credits_noquota[DTO_INDEX_INSERT]);
5875
5876         return 0;
5877 }
5878
5879 /**
5880  *      Inserts (key, value) pair in \a dt index object.
5881  *
5882  *      \param  dt      osd index object
5883  *      \param  key     key for index
5884  *      \param  rec     record reference
5885  *      \param  th      transaction handler
5886  *
5887  *      \retval  0  success
5888  *      \retval -ve failure
5889  */
5890 static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
5891                                 const struct dt_rec *rec,
5892                                 const struct dt_key *key, struct thandle *th)
5893 {
5894         struct osd_object *obj = osd_dt_obj(dt);
5895         struct iam_path_descr *ipd;
5896         struct osd_thandle *oh;
5897         struct iam_container *bag;
5898         struct osd_thread_info *oti = osd_oti_get(env);
5899         struct iam_rec *iam_rec;
5900         int rc;
5901
5902         ENTRY;
5903
5904         if (!dt_object_exists(dt))
5905                 RETURN(-ENOENT);
5906
5907         LINVRNT(osd_invariant(obj));
5908         LASSERT(!dt_object_remote(dt));
5909
5910         bag = &obj->oo_dir->od_container;
5911         LASSERT(bag->ic_object == obj->oo_inode);
5912         LASSERT(th != NULL);
5913
5914         osd_trans_exec_op(env, th, OSD_OT_INSERT);
5915
5916         ipd = osd_idx_ipd_get(env, bag);
5917         if (unlikely(ipd == NULL))
5918                 RETURN(-ENOMEM);
5919
5920         oh = container_of(th, struct osd_thandle, ot_super);
5921         LASSERT(oh->ot_handle != NULL);
5922         LASSERT(oh->ot_handle->h_transaction != NULL);
5923         if (S_ISDIR(obj->oo_inode->i_mode)) {
5924                 iam_rec = (struct iam_rec *)oti->oti_ldp;
5925                 osd_fid_pack((struct osd_fid_pack *)iam_rec, rec,
5926                              &oti->oti_fid);
5927         } else if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
5928                 /* pack quota uid/gid */
5929                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
5930                 key = (const struct dt_key *)&oti->oti_quota_id;
5931                 /* pack quota record */
5932                 rec = osd_quota_pack(obj, rec, &oti->oti_quota_rec);
5933                 iam_rec = (struct iam_rec *)rec;
5934         } else {
5935                 iam_rec = (struct iam_rec *)rec;
5936         }
5937
5938         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
5939                         iam_rec, ipd);
5940         osd_ipd_put(env, bag, ipd);
5941         LINVRNT(osd_invariant(obj));
5942         osd_trans_exec_check(env, th, OSD_OT_INSERT);
5943         RETURN(rc);
5944 }
5945
5946 /**
5947  * Calls ldiskfs_add_entry() to add directory entry
5948  * into the directory. This is required for
5949  * interoperability mode (b11826)
5950  *
5951  * \retval   0, on success
5952  * \retval -ve, on error
5953  */
5954 static int __osd_ea_add_rec(struct osd_thread_info *info,
5955                             struct osd_object *pobj, struct inode  *cinode,
5956                             const char *name, const struct lu_fid *fid,
5957                             struct htree_lock *hlock, struct thandle *th)
5958 {
5959         struct ldiskfs_dentry_param *ldp;
5960         struct dentry *child;
5961         struct osd_thandle *oth;
5962         struct lu_name ln;
5963         int rc;
5964
5965         oth = container_of(th, struct osd_thandle, ot_super);
5966         LASSERT(oth->ot_handle != NULL);
5967         LASSERT(oth->ot_handle->h_transaction != NULL);
5968         LASSERT(pobj->oo_inode);
5969
5970         rc = obj_name2lu_name(pobj, name, strlen(name), &ln);
5971         if (rc)
5972                 RETURN(rc);
5973
5974         ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
5975         if (unlikely(osd_object_is_root(pobj)))
5976                 ldp->edp_magic = 0;
5977         else
5978                 osd_get_ldiskfs_dirent_param(ldp, fid);
5979         child = osd_child_dentry_get(info->oti_env, pobj,
5980                                      ln.ln_name, ln.ln_namelen);
5981         child->d_fsdata = (void *)ldp;
5982         dquot_initialize(pobj->oo_inode);
5983         rc = osd_ldiskfs_add_entry(info, osd_obj2dev(pobj), oth->ot_handle,
5984                                    child, cinode, hlock);
5985         if (rc == 0 && CFS_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_TYPE)) {
5986                 struct ldiskfs_dir_entry_2      *de;
5987                 struct buffer_head              *bh;
5988                 int                              rc1;
5989
5990                 bh = osd_ldiskfs_find_entry(pobj->oo_inode, &child->d_name, &de,
5991                                             NULL, hlock);
5992                 if (!IS_ERR(bh)) {
5993                         rc1 = osd_ldiskfs_journal_get_write_access(
5994                                 oth->ot_handle, pobj->oo_inode->i_sb, bh,
5995                                 LDISKFS_JTR_NONE);
5996                         if (rc1 == 0) {
5997                                 if (S_ISDIR(cinode->i_mode))
5998                                         de->file_type = LDISKFS_DIRENT_LUFID |
5999                                                         LDISKFS_FT_REG_FILE;
6000                                 else
6001                                         de->file_type = LDISKFS_DIRENT_LUFID |
6002                                                         LDISKFS_FT_DIR;
6003                                 ldiskfs_handle_dirty_metadata(oth->ot_handle,
6004                                                               NULL, bh);
6005                         }
6006                         brelse(bh);
6007                 }
6008         }
6009
6010         if (ln.ln_name != name)
6011                 kfree(ln.ln_name);
6012         RETURN(rc);
6013 }
6014
6015 /**
6016  * Calls ldiskfs_add_dot_dotdot() to add dot and dotdot entries
6017  * into the directory.Also sets flags into osd object to
6018  * indicate dot and dotdot are created. This is required for
6019  * interoperability mode (b11826)
6020  *
6021  * \param dir   directory for dot and dotdot fixup.
6022  * \param obj   child object for linking
6023  *
6024  * \retval   0, on success
6025  * \retval -ve, on error
6026  */
6027 static int osd_add_dot_dotdot(struct osd_thread_info *info,
6028                               struct osd_object *dir,
6029                               struct inode *parent_dir, const char *name,
6030                               const struct lu_fid *dot_fid,
6031                               const struct lu_fid *dot_dot_fid,
6032                               struct thandle *th)
6033 {
6034         struct inode *inode = dir->oo_inode;
6035         struct osd_thandle *oth;
6036         int result = 0;
6037
6038         oth = container_of(th, struct osd_thandle, ot_super);
6039         LASSERT(oth->ot_handle->h_transaction != NULL);
6040         LASSERT(S_ISDIR(dir->oo_inode->i_mode));
6041
6042         if (strcmp(name, dot) == 0) {
6043                 if (dir->oo_compat_dot_created) {
6044                         result = -EEXIST;
6045                 } else {
6046                         LASSERT(inode->i_ino == parent_dir->i_ino);
6047                         dir->oo_compat_dot_created = 1;
6048                         result = 0;
6049                 }
6050         } else if (strcmp(name, dotdot) == 0) {
6051                 if (!dir->oo_compat_dot_created)
6052                         return -EINVAL;
6053                 /* in case of rename, dotdot is already created */
6054                 if (dir->oo_compat_dotdot_created) {
6055                         return __osd_ea_add_rec(info, dir, parent_dir, name,
6056                                                 dot_dot_fid, NULL, th);
6057                 }
6058
6059                 if (CFS_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PARENT)) {
6060                         struct lu_fid tfid = *dot_dot_fid;
6061
6062                         tfid.f_oid--;
6063                         result = osd_add_dot_dotdot_internal(info,
6064                                         dir->oo_inode, parent_dir, dot_fid,
6065                                         &tfid, oth);
6066                 } else {
6067                         result = osd_add_dot_dotdot_internal(info,
6068                                         dir->oo_inode, parent_dir, dot_fid,
6069                                         dot_dot_fid, oth);
6070                 }
6071
6072                 if (result == 0)
6073                         dir->oo_compat_dotdot_created = 1;
6074         }
6075
6076         return result;
6077 }
6078
6079
6080 /**
6081  * It will call the appropriate osd_add* function and return the
6082  * value, return by respective functions.
6083  */
6084 static int osd_ea_add_rec(const struct lu_env *env, struct osd_object *pobj,
6085                           struct inode *cinode, const char *name,
6086                           const struct lu_fid *fid, struct thandle *th)
6087 {
6088         struct osd_thread_info *info = osd_oti_get(env);
6089         struct htree_lock *hlock;
6090         int rc;
6091
6092         hlock = pobj->oo_hl_head != NULL ? info->oti_hlock : NULL;
6093
6094         if (name[0] == '.' && (name[1] == '\0' ||
6095                                (name[1] == '.' && name[2] == '\0'))) {
6096                 if (hlock != NULL) {
6097                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
6098                                            pobj->oo_inode, 0);
6099                 } else {
6100                         down_write(&pobj->oo_ext_idx_sem);
6101                 }
6102
6103                 rc = osd_add_dot_dotdot(info, pobj, cinode, name,
6104                                         lu_object_fid(&pobj->oo_dt.do_lu),
6105                                         fid, th);
6106         } else {
6107                 if (hlock != NULL) {
6108                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
6109                                            pobj->oo_inode, LDISKFS_HLOCK_ADD);
6110                 } else {
6111                         down_write(&pobj->oo_ext_idx_sem);
6112                 }
6113
6114                 if (CFS_FAIL_CHECK(OBD_FAIL_FID_INDIR)) {
6115                         struct lu_fid *tfid = &info->oti_fid;
6116
6117                         *tfid = *fid;
6118                         tfid->f_ver = ~0;
6119                         rc = __osd_ea_add_rec(info, pobj, cinode, name,
6120                                               tfid, hlock, th);
6121                 } else {
6122                         rc = __osd_ea_add_rec(info, pobj, cinode, name, fid,
6123                                               hlock, th);
6124                 }
6125         }
6126         if (!rc && fid_is_namespace_visible(lu_object_fid(&pobj->oo_dt.do_lu))
6127             && pobj->oo_dirent_count != LU_DIRENT_COUNT_UNSET)
6128                 pobj->oo_dirent_count++;
6129
6130         if (hlock != NULL)
6131                 ldiskfs_htree_unlock(hlock);
6132         else
6133                 up_write(&pobj->oo_ext_idx_sem);
6134
6135         return rc;
6136 }
6137
6138 static int
6139 osd_ldiskfs_consistency_check(struct osd_thread_info *oti,
6140                               struct osd_device *dev,
6141                               const struct lu_fid *fid,
6142                               struct osd_inode_id *id)
6143 {
6144         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
6145         struct inode *inode = NULL;
6146         int once = 0;
6147         bool insert;
6148         int rc;
6149
6150         ENTRY;
6151         if (!scrub_needs_check(scrub, fid, id->oii_ino))
6152                 RETURN(0);
6153 again:
6154         rc = osd_oi_lookup(oti, dev, fid, &oti->oti_id, 0);
6155         if (rc == -ENOENT) {
6156                 __u32 gen = id->oii_gen;
6157
6158                 insert = true;
6159                 if (inode != NULL)
6160                         goto trigger;
6161
6162                 inode = osd_iget(oti, dev, id);
6163                 /* The inode has been removed (by race maybe). */
6164                 if (IS_ERR(inode)) {
6165                         rc = PTR_ERR(inode);
6166
6167                         RETURN(rc == -ESTALE ? -ENOENT : rc);
6168                 }
6169
6170                 /* The OI mapping is lost. */
6171                 if (gen != OSD_OII_NOGEN)
6172                         goto trigger;
6173
6174                 /*
6175                  * The inode may has been reused by others, we do not know,
6176                  * leave it to be handled by subsequent osd_fid_lookup().
6177                  */
6178                 GOTO(out, rc = 0);
6179         } else if (rc || osd_id_eq(id, &oti->oti_id)) {
6180                 GOTO(out, rc);
6181         }
6182
6183         insert = false;
6184
6185 trigger:
6186         if (scrub->os_running) {
6187                 if (inode == NULL) {
6188                         inode = osd_iget(oti, dev, id);
6189                         /* The inode has been removed (by race maybe). */
6190                         if (IS_ERR(inode)) {
6191                                 rc = PTR_ERR(inode);
6192
6193                                 RETURN(rc == -ESTALE ? -ENOENT : rc);
6194                         }
6195                 }
6196
6197                 rc = osd_scrub_oi_insert(dev, fid, id, insert);
6198                 /*
6199                  * There is race condition between osd_oi_lookup and OI scrub.
6200                  * The OI scrub finished just after osd_oi_lookup() failure.
6201                  * Under such case, it is unnecessary to trigger OI scrub again,
6202                  * but try to call osd_oi_lookup() again.
6203                  */
6204                 if (unlikely(rc == -EAGAIN))
6205                         goto again;
6206
6207                 if (!S_ISDIR(inode->i_mode))
6208                         rc = 0;
6209                 else
6210                         rc = osd_check_lmv(oti, dev, inode);
6211
6212                 GOTO(out, rc);
6213         }
6214
6215         if (dev->od_scrub.os_scrub.os_auto_scrub_interval != AS_NEVER &&
6216             ++once == 1) {
6217                 rc = osd_scrub_start(oti->oti_env, dev, SS_AUTO_PARTIAL |
6218                                      SS_CLEAR_DRYRUN | SS_CLEAR_FAILOUT);
6219                 CDEBUG_LIMIT(D_LFSCK | D_CONSOLE | D_WARNING,
6220                              "%s: trigger partial OI scrub for RPC inconsistency, checking FID "DFID"/%u: rc = %d\n",
6221                              osd_dev2name(dev), PFID(fid), id->oii_ino, rc);
6222                 if (rc == 0 || rc == -EALREADY)
6223                         goto again;
6224         }
6225
6226         GOTO(out, rc);
6227
6228 out:
6229         iput(inode);
6230
6231         RETURN(rc);
6232 }
6233
6234 static int osd_fail_fid_lookup(struct osd_thread_info *oti,
6235                                struct osd_device *dev,
6236                                struct lu_fid *fid, __u32 ino)
6237 {
6238         struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
6239         struct osd_idmap_cache *oic = &oti->oti_cache;
6240         struct inode *inode;
6241         int rc;
6242
6243         osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
6244         inode = osd_iget(oti, dev, &oic->oic_lid);
6245         if (IS_ERR(inode)) {
6246                 fid_zero(&oic->oic_fid);
6247                 return PTR_ERR(inode);
6248         }
6249
6250         rc = osd_get_lma(oti, inode, &oti->oti_obj_dentry, loa);
6251         iput(inode);
6252         if (rc != 0)
6253                 fid_zero(&oic->oic_fid);
6254         else
6255                 *fid = oic->oic_fid = loa->loa_lma.lma_self_fid;
6256         return rc;
6257 }
6258
6259 void osd_add_oi_cache(struct osd_thread_info *info, struct osd_device *osd,
6260                       struct osd_inode_id *id, const struct lu_fid *fid)
6261 {
6262         CDEBUG(D_INODE, "add "DFID" %u:%u to info %p\n", PFID(fid),
6263                id->oii_ino, id->oii_gen, info);
6264         info->oti_cache.oic_lid = *id;
6265         info->oti_cache.oic_fid = *fid;
6266         info->oti_cache.oic_dev = osd;
6267 }
6268
6269 /**
6270  * Get parent FID from the linkEA.
6271  *
6272  * For a directory which parent resides on remote MDT, to satisfy the
6273  * local e2fsck, we insert it into the /REMOTE_PARENT_DIR locally. On
6274  * the other hand, to make the lookup(..) on the directory can return
6275  * the real parent FID, we append the real parent FID after its ".."
6276  * name entry in the /REMOTE_PARENT_DIR.
6277  *
6278  * Unfortunately, such PFID-in-dirent cannot be preserved via file-level
6279  * backup. So after the restore, we cannot get the right parent FID from
6280  * its ".." name entry in the /REMOTE_PARENT_DIR. Under such case, since
6281  * we have stored the real parent FID in the directory object's linkEA,
6282  * we can parse the linkEA for the real parent FID.
6283  *
6284  * \param[in] env       pointer to the thread context
6285  * \param[in] obj       pointer to the object to be handled
6286  * \param[out]fid       pointer to the buffer to hold the parent FID
6287  *
6288  * \retval              0 for getting the real parent FID successfully
6289  * \retval              negative error number on failure
6290  */
6291 static int osd_get_pfid_from_linkea(const struct lu_env *env,
6292                                     struct osd_object *obj,
6293                                     struct lu_fid *fid)
6294 {
6295         struct osd_thread_info *oti = osd_oti_get(env);
6296         struct lu_buf *buf = &oti->oti_big_buf;
6297         struct dentry *dentry = &oti->oti_obj_dentry;
6298         struct inode *inode = obj->oo_inode;
6299         struct linkea_data ldata = { NULL };
6300         int rc;
6301
6302         ENTRY;
6303
6304         fid_zero(fid);
6305         if (!S_ISDIR(inode->i_mode))
6306                 RETURN(-EIO);
6307
6308 again:
6309         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
6310                              buf->lb_buf, buf->lb_len);
6311         if (rc == -ERANGE) {
6312                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
6313                                      NULL, 0);
6314                 if (rc > 0) {
6315                         lu_buf_realloc(buf, rc);
6316                         if (buf->lb_buf == NULL)
6317                                 RETURN(-ENOMEM);
6318
6319                         goto again;
6320                 }
6321         }
6322
6323         if (unlikely(rc == 0))
6324                 RETURN(-ENODATA);
6325
6326         if (rc < 0)
6327                 RETURN(rc);
6328
6329         if (unlikely(buf->lb_buf == NULL)) {
6330                 lu_buf_realloc(buf, rc);
6331                 if (buf->lb_buf == NULL)
6332                         RETURN(-ENOMEM);
6333
6334                 goto again;
6335         }
6336
6337         ldata.ld_buf = buf;
6338         rc = linkea_init_with_rec(&ldata);
6339         if (!rc) {
6340                 linkea_first_entry(&ldata);
6341                 linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, NULL, fid);
6342         }
6343
6344         RETURN(rc);
6345 }
6346
6347 static int osd_verify_ent_by_linkea(const struct lu_env *env,
6348                                     struct inode *inode,
6349                                     const struct lu_fid *pfid,
6350                                     const char *name, const int namelen)
6351 {
6352         struct osd_thread_info *oti = osd_oti_get(env);
6353         struct lu_buf *buf = &oti->oti_big_buf;
6354         struct dentry *dentry = &oti->oti_obj_dentry;
6355         struct linkea_data ldata = { NULL };
6356         struct lu_name cname = { .ln_name = name,
6357                                  .ln_namelen = namelen };
6358         int rc;
6359
6360         ENTRY;
6361
6362 again:
6363         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
6364                              buf->lb_buf, buf->lb_len);
6365         if (rc == -ERANGE)
6366                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK, NULL, 0);
6367
6368         if (rc < 0)
6369                 RETURN(rc);
6370
6371         if (unlikely(rc == 0))
6372                 RETURN(-ENODATA);
6373
6374         if (buf->lb_len < rc) {
6375                 lu_buf_realloc(buf, rc);
6376                 if (buf->lb_buf == NULL)
6377                         RETURN(-ENOMEM);
6378
6379                 goto again;
6380         }
6381
6382         ldata.ld_buf = buf;
6383         rc = linkea_init_with_rec(&ldata);
6384         if (!rc)
6385                 rc = linkea_links_find(&ldata, &cname, pfid);
6386
6387         RETURN(rc);
6388 }
6389
6390 /**
6391  * Calls ->lookup() to find dentry. From dentry get inode and
6392  * read inode's ea to get fid. This is required for  interoperability
6393  * mode (b11826)
6394  *
6395  * \retval   0, on success
6396  * \retval -ve, on error
6397  */
6398 static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
6399                              struct dt_rec *rec, const struct lu_name *ln)
6400 {
6401         struct inode *dir = obj->oo_inode;
6402         struct dentry *dentry;
6403         struct ldiskfs_dir_entry_2 *de;
6404         struct buffer_head *bh;
6405         struct lu_fid *fid = (struct lu_fid *)rec;
6406         struct htree_lock *hlock = NULL;
6407         int ino;
6408         int rc;
6409
6410         ENTRY;
6411
6412         LASSERT(dir->i_op != NULL);
6413         LASSERT(dir->i_op->lookup != NULL);
6414
6415         dentry = osd_child_dentry_get(env, obj, ln->ln_name, ln->ln_namelen);
6416
6417         if (obj->oo_hl_head != NULL) {
6418                 hlock = osd_oti_get(env)->oti_hlock;
6419                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
6420                                    dir, LDISKFS_HLOCK_LOOKUP);
6421         } else {
6422                 down_read(&obj->oo_ext_idx_sem);
6423         }
6424
6425         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
6426         if (!IS_ERR(bh)) {
6427                 struct osd_thread_info *oti = osd_oti_get(env);
6428                 struct osd_inode_id *id = &oti->oti_id;
6429                 struct osd_device *dev = osd_obj2dev(obj);
6430
6431                 ino = le32_to_cpu(de->inode);
6432                 if (CFS_FAIL_CHECK(OBD_FAIL_FID_LOOKUP)) {
6433                         brelse(bh);
6434                         rc = osd_fail_fid_lookup(oti, dev, fid, ino);
6435                         GOTO(out, rc);
6436                 }
6437
6438                 rc = osd_get_fid_from_dentry(de, rec);
6439
6440                 /* done with de, release bh */
6441                 brelse(bh);
6442                 if (rc != 0) {
6443                         if (unlikely(is_remote_parent_ino(dev, ino))) {
6444                                 /*
6445                                  * If the parent is on remote MDT, and there
6446                                  * is no FID-in-dirent, then we have to get
6447                                  * the parent FID from the linkEA.
6448                                  */
6449                                 if (likely(ln->ln_namelen == 2 &&
6450                                            ln->ln_name[0] == '.' && ln->ln_name[1] == '.'))
6451                                         rc = osd_get_pfid_from_linkea(env, obj,
6452                                                                       fid);
6453                         } else {
6454                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
6455                         }
6456                 } else {
6457                         osd_id_gen(id, ino, OSD_OII_NOGEN);
6458                 }
6459
6460                 if (rc != 0 || osd_remote_fid(env, dev, fid))
6461                         GOTO(out, rc);
6462
6463                 rc = osd_ldiskfs_consistency_check(oti, dev, fid, id);
6464                 if (rc != -ENOENT) {
6465                         /* Other error should not affect lookup result. */
6466                         rc = 0;
6467
6468                         /* Normal file mapping should be added into OI cache
6469                          * after FID in LMA check, but for local files like
6470                          * hsm_actions, their FIDs are not stored in OI files,
6471                          * see osd_initial_OI_scrub(), and here is the only
6472                          * place to load mapping into OI cache.
6473                          */
6474                         if (!fid_is_namespace_visible(fid))
6475                                 osd_add_oi_cache(osd_oti_get(env),
6476                                                  osd_obj2dev(obj), id, fid);
6477                 }
6478                 CDEBUG(D_INODE, DFID"/"DNAME" => "DFID"\n",
6479                        PFID(lu_object_fid(&obj->oo_dt.do_lu)), PNAME(ln),
6480                        PFID(fid));
6481         } else {
6482                 rc = PTR_ERR(bh);
6483         }
6484
6485         GOTO(out, rc);
6486
6487 out:
6488         if (hlock != NULL)
6489                 ldiskfs_htree_unlock(hlock);
6490         else
6491                 up_read(&obj->oo_ext_idx_sem);
6492         RETURN(rc);
6493 }
6494
6495 static int osd_index_declare_ea_insert(const struct lu_env *env,
6496                                        struct dt_object *dt,
6497                                        const struct dt_rec *rec,
6498                                        const struct dt_key *key,
6499                                        struct thandle *handle)
6500 {
6501         struct osd_thandle *oh;
6502         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
6503         struct dt_insert_rec *rec1 = (struct dt_insert_rec *)rec;
6504         const struct lu_fid *fid = rec1->rec_fid;
6505         int credits, rc = 0;
6506         struct osd_idmap_cache *idc;
6507
6508         ENTRY;
6509
6510         LASSERT(!dt_object_remote(dt));
6511         LASSERT(handle != NULL);
6512         LASSERT(fid != NULL);
6513         LASSERT(rec1->rec_type != 0);
6514
6515         oh = container_of(handle, struct osd_thandle, ot_super);
6516         LASSERT(oh->ot_handle == NULL);
6517
6518         credits = osd_dto_credits_noquota[DTO_INDEX_INSERT];
6519
6520         /*
6521          * we can't call iget() while a transactions is running
6522          * (this can lead to a deadlock), but we need to know
6523          * inum and object type. so we find this information at
6524          * declaration and cache in per-thread info
6525          */
6526         idc = osd_idc_find_or_init(env, osd, fid);
6527         if (IS_ERR(idc))
6528                 RETURN(PTR_ERR(idc));
6529         if (idc->oic_remote) {
6530                 /*
6531                  * a reference to remote inode is represented by an
6532                  * agent inode which we have to create
6533                  */
6534                 credits += osd_dto_credits_noquota[DTO_OBJECT_CREATE];
6535                 credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
6536         }
6537
6538         osd_trans_declare_op(env, oh, OSD_OT_INSERT, credits);
6539
6540         if (osd_dt_obj(dt)->oo_inode != NULL) {
6541                 struct inode *inode = osd_dt_obj(dt)->oo_inode;
6542
6543                 /*
6544                  * We ignore block quota on meta pool (MDTs), so needn't
6545                  * calculate how many blocks will be consumed by this index
6546                  * insert
6547                  */
6548                 rc = osd_declare_inode_qid(env, i_uid_read(inode),
6549                                            i_gid_read(inode),
6550                                            i_projid_read(inode), 0,
6551                                            oh, osd_dt_obj(dt), NULL,
6552                                            OSD_QID_BLK);
6553                 if (rc)
6554                         RETURN(rc);
6555
6556 #ifdef HAVE_PROJECT_QUOTA
6557                 /*
6558                  * Reserve credits for local agent inode to transfer
6559                  * to 0, quota enforcement is ignored in this case.
6560                  */
6561                 if (idc->oic_remote &&
6562                     LDISKFS_I(inode)->i_flags & LUSTRE_PROJINHERIT_FL &&
6563                     i_projid_read(inode) != 0)
6564                         rc = osd_declare_attr_qid(env, osd_dt_obj(dt), oh,
6565                                                   0, i_projid_read(inode),
6566                                                   0, false, PRJQUOTA);
6567 #endif
6568         }
6569
6570         RETURN(rc);
6571 }
6572
6573 /**
6574  * Index add function for interoperability mode (b11826).
6575  * It will add the directory entry.This entry is needed to
6576  * maintain name->fid mapping.
6577  *
6578  * \param key it is key i.e. file entry to be inserted
6579  * \param rec it is value of given key i.e. fid
6580  *
6581  * \retval   0, on success
6582  * \retval -ve, on error
6583  */
6584 static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
6585                                const struct dt_rec *rec,
6586                                const struct dt_key *key, struct thandle *th)
6587 {
6588         struct osd_object *obj = osd_dt_obj(dt);
6589         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
6590         struct dt_insert_rec *rec1 = (struct dt_insert_rec *)rec;
6591         const struct lu_fid *fid = rec1->rec_fid;
6592         const char *name = (const char *)key;
6593         struct osd_thread_info *oti = osd_oti_get(env);
6594         struct inode *child_inode = NULL;
6595         struct osd_idmap_cache *idc;
6596         int rc;
6597
6598         ENTRY;
6599
6600         if (!dt_object_exists(dt))
6601                 RETURN(-ENOENT);
6602
6603         LASSERT(osd_invariant(obj));
6604         LASSERT(!dt_object_remote(dt));
6605         LASSERT(th != NULL);
6606
6607         osd_trans_exec_op(env, th, OSD_OT_INSERT);
6608
6609         LASSERTF(fid_is_sane(fid), "fid"DFID" is insane!\n", PFID(fid));
6610
6611         idc = osd_idc_find(env, osd, fid);
6612         if (unlikely(idc == NULL)) {
6613                 idc = osd_idc_find_or_init(env, osd, fid);
6614                 if (IS_ERR(idc)) {
6615                         /*
6616                          * this dt_insert() wasn't declared properly, so
6617                          * FID is missing in OI cache. we better do not
6618                          * lookup FID in FLDB/OI and don't risk to deadlock,
6619                          * but in some special cases (lfsck testing, etc)
6620                          * it's much simpler than fixing a caller.
6621                          *
6622                          * normally this error should be placed after the first
6623                          * find, but migrate may attach source stripes to
6624                          * target, which doesn't create stripes.
6625                          */
6626                         CERROR("%s: "DFID" wasn't declared for insert\n",
6627                                osd_name(osd), PFID(fid));
6628                         dump_stack();
6629                         RETURN(PTR_ERR(idc));
6630                 }
6631         }
6632
6633         if (idc->oic_remote) {
6634                 /* Insert remote entry */
6635                 if (strcmp(name, dotdot) == 0 && strlen(name) == 2) {
6636                         child_inode =
6637                         igrab(osd->od_mdt_map->omm_remote_parent->d_inode);
6638                 } else {
6639                         child_inode = osd_create_local_agent_inode(env, osd,
6640                                         obj, fid, rec1->rec_type & S_IFMT, th);
6641                         if (IS_ERR(child_inode))
6642                                 RETURN(PTR_ERR(child_inode));
6643                 }
6644         } else {
6645                 /* Insert local entry */
6646                 if (unlikely(idc->oic_lid.oii_ino == 0)) {
6647                         /* for a reason OI cache wasn't filled properly */
6648                         CERROR("%s: OIC for "DFID" isn't filled\n",
6649                                osd_name(osd), PFID(fid));
6650                         RETURN(-EINVAL);
6651                 }
6652                 child_inode = oti->oti_inode;
6653                 if (unlikely(child_inode == NULL)) {
6654                         struct ldiskfs_inode_info *lii;
6655
6656                         OBD_ALLOC_PTR(lii);
6657                         if (lii == NULL)
6658                                 RETURN(-ENOMEM);
6659                         child_inode = oti->oti_inode = &lii->vfs_inode;
6660                 }
6661                 child_inode->i_sb = osd_sb(osd);
6662                 child_inode->i_ino = idc->oic_lid.oii_ino;
6663                 child_inode->i_mode = rec1->rec_type & S_IFMT;
6664         }
6665
6666         rc = osd_ea_add_rec(env, obj, child_inode, name, fid, th);
6667
6668         CDEBUG(D_INODE, "parent %lu insert %s:%lu rc = %d\n",
6669                obj->oo_inode->i_ino, name, child_inode->i_ino, rc);
6670
6671         if (child_inode && child_inode != oti->oti_inode)
6672                 iput(child_inode);
6673         LASSERT(osd_invariant(obj));
6674         osd_trans_exec_check(env, th, OSD_OT_INSERT);
6675
6676         RETURN(rc);
6677 }
6678
6679 /**
6680  *  Initialize osd Iterator for given osd index object.
6681  *
6682  *  \param  dt      osd index object
6683  */
6684
6685 static struct dt_it *osd_it_iam_init(const struct lu_env *env,
6686                                      struct dt_object *dt,
6687                                      __u32 unused)
6688 {
6689         struct osd_it_iam *it;
6690         struct osd_object *obj = osd_dt_obj(dt);
6691         struct lu_object *lo = &dt->do_lu;
6692         struct iam_path_descr *ipd;
6693         struct iam_container *bag = &obj->oo_dir->od_container;
6694
6695         if (!dt_object_exists(dt))
6696                 return ERR_PTR(-ENOENT);
6697
6698         OBD_ALLOC_PTR(it);
6699         if (it == NULL)
6700                 return ERR_PTR(-ENOMEM);
6701
6702         ipd = osd_it_ipd_get(env, bag);
6703         if (likely(ipd != NULL)) {
6704                 it->oi_obj = obj;
6705                 it->oi_ipd = ipd;
6706                 lu_object_get(lo);
6707                 iam_it_init(&it->oi_it, bag, IAM_IT_MOVE, ipd);
6708                 return (struct dt_it *)it;
6709         } else {
6710                 OBD_FREE_PTR(it);
6711                 return ERR_PTR(-ENOMEM);
6712         }
6713 }
6714
6715 /**
6716  * free given Iterator.
6717  */
6718 static void osd_it_iam_fini(const struct lu_env *env, struct dt_it *di)
6719 {
6720         struct osd_it_iam *it  = (struct osd_it_iam *)di;
6721         struct osd_object *obj = it->oi_obj;
6722
6723         iam_it_fini(&it->oi_it);
6724         osd_ipd_put(env, &obj->oo_dir->od_container, it->oi_ipd);
6725         osd_object_put(env, obj);
6726         OBD_FREE_PTR(it);
6727 }
6728
6729 /**
6730  *  Move Iterator to record specified by \a key
6731  *
6732  *  \param  di      osd iterator
6733  *  \param  key     key for index
6734  *
6735  *  \retval +ve  di points to record with least key not larger than key
6736  *  \retval  0   di points to exact matched key
6737  *  \retval -ve  failure
6738  */
6739
6740 static int osd_it_iam_get(const struct lu_env *env,
6741                           struct dt_it *di, const struct dt_key *key)
6742 {
6743         struct osd_thread_info *oti = osd_oti_get(env);
6744         struct osd_it_iam *it = (struct osd_it_iam *)di;
6745
6746         if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
6747                 /* swab quota uid/gid */
6748                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
6749                 key = (struct dt_key *)&oti->oti_quota_id;
6750         }
6751
6752         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
6753 }
6754
6755 /**
6756  *  Release Iterator
6757  *
6758  *  \param  di      osd iterator
6759  */
6760 static void osd_it_iam_put(const struct lu_env *env, struct dt_it *di)
6761 {
6762         struct osd_it_iam *it = (struct osd_it_iam *)di;
6763
6764         iam_it_put(&it->oi_it);
6765 }
6766
6767 /**
6768  *  Move iterator by one record
6769  *
6770  *  \param  di      osd iterator
6771  *
6772  *  \retval +1   end of container reached
6773  *  \retval  0   success
6774  *  \retval -ve  failure
6775  */
6776
6777 static int osd_it_iam_next(const struct lu_env *env, struct dt_it *di)
6778 {
6779         struct osd_it_iam *it = (struct osd_it_iam *)di;
6780
6781         return iam_it_next(&it->oi_it);
6782 }
6783
6784 /**
6785  * Return pointer to the key under iterator.
6786  */
6787
6788 static struct dt_key *osd_it_iam_key(const struct lu_env *env,
6789                                      const struct dt_it *di)
6790 {
6791         struct osd_thread_info *oti = osd_oti_get(env);
6792         struct osd_it_iam *it = (struct osd_it_iam *)di;
6793         struct osd_object *obj = it->oi_obj;
6794         struct dt_key *key;
6795
6796         key = (struct dt_key *)iam_it_key_get(&it->oi_it);
6797
6798         if (!IS_ERR(key) && fid_is_quota(lu_object_fid(&obj->oo_dt.do_lu))) {
6799                 /* swab quota uid/gid */
6800                 oti->oti_quota_id = le64_to_cpu(*((__u64 *)key));
6801                 key = (struct dt_key *)&oti->oti_quota_id;
6802         }
6803
6804         return key;
6805 }
6806
6807 /**
6808  * Return size of key under iterator (in bytes)
6809  */
6810
6811 static int osd_it_iam_key_size(const struct lu_env *env, const struct dt_it *di)
6812 {
6813         struct osd_it_iam *it = (struct osd_it_iam *)di;
6814
6815         return iam_it_key_size(&it->oi_it);
6816 }
6817
6818 static inline void
6819 osd_it_append_attrs(struct lu_dirent *ent, int len, __u16 type)
6820 {
6821         /* check if file type is required */
6822         if (ent->lde_attrs & LUDA_TYPE) {
6823                 struct luda_type *lt;
6824                 int align = sizeof(*lt) - 1;
6825
6826                 len = (len + align) & ~align;
6827                 lt = (struct luda_type *)(ent->lde_name + len);
6828                 lt->lt_type = cpu_to_le16(DTTOIF(type));
6829         }
6830
6831         ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
6832 }
6833
6834 /**
6835  * build lu direct from backend fs dirent.
6836  */
6837
6838 static inline void
6839 osd_it_pack_dirent(struct lu_dirent *ent, struct lu_fid *fid, __u64 offset,
6840                    char *name, __u16 namelen, __u16 type, __u32 attr)
6841 {
6842         ent->lde_attrs = attr | LUDA_FID;
6843         fid_cpu_to_le(&ent->lde_fid, fid);
6844
6845         ent->lde_hash = cpu_to_le64(offset);
6846         ent->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
6847
6848         strncpy(ent->lde_name, name, namelen);
6849         ent->lde_name[namelen] = '\0';
6850         ent->lde_namelen = cpu_to_le16(namelen);
6851
6852         /* append lustre attributes */
6853         osd_it_append_attrs(ent, namelen, type);
6854 }
6855
6856 /**
6857  * Return pointer to the record under iterator.
6858  */
6859 static int osd_it_iam_rec(const struct lu_env *env,
6860                           const struct dt_it *di,
6861                           struct dt_rec *dtrec, __u32 attr)
6862 {
6863         struct osd_it_iam *it = (struct osd_it_iam *)di;
6864         struct osd_thread_info *info = osd_oti_get(env);
6865
6866         ENTRY;
6867
6868         if (S_ISDIR(it->oi_obj->oo_inode->i_mode)) {
6869                 const struct osd_fid_pack *rec;
6870                 struct lu_fid *fid = &info->oti_fid;
6871                 struct lu_dirent *lde = (struct lu_dirent *)dtrec;
6872                 char *name;
6873                 int namelen;
6874                 __u64 hash;
6875                 int rc;
6876
6877                 name = (char *)iam_it_key_get(&it->oi_it);
6878                 if (IS_ERR(name))
6879                         RETURN(PTR_ERR(name));
6880
6881                 namelen = iam_it_key_size(&it->oi_it);
6882
6883                 rec = (const struct osd_fid_pack *)iam_it_rec_get(&it->oi_it);
6884                 if (IS_ERR(rec))
6885                         RETURN(PTR_ERR(rec));
6886
6887                 rc = osd_fid_unpack(fid, rec);
6888                 if (rc)
6889                         RETURN(rc);
6890
6891                 hash = iam_it_store(&it->oi_it);
6892
6893                 /* IAM does not store object type in IAM index (dir) */
6894                 osd_it_pack_dirent(lde, fid, hash, name, namelen,
6895                                    0, LUDA_FID);
6896         } else if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
6897                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
6898                            (struct iam_rec *)dtrec);
6899                 osd_quota_unpack(it->oi_obj, dtrec);
6900         } else {
6901                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
6902                            (struct iam_rec *)dtrec);
6903         }
6904
6905         RETURN(0);
6906 }
6907
6908 /**
6909  * Returns cookie for current Iterator position.
6910  */
6911 static __u64 osd_it_iam_store(const struct lu_env *env, const struct dt_it *di)
6912 {
6913         struct osd_it_iam *it = (struct osd_it_iam *)di;
6914
6915         return iam_it_store(&it->oi_it);
6916 }
6917
6918 /**
6919  * Restore iterator from cookie.
6920  *
6921  * \param  di      osd iterator
6922  * \param  hash    Iterator location cookie
6923  *
6924  * \retval +ve  di points to record with least key not larger than key.
6925  * \retval  0   di points to exact matched key
6926  * \retval -ve  failure
6927  */
6928
6929 static int osd_it_iam_load(const struct lu_env *env,
6930                            const struct dt_it *di, __u64 hash)
6931 {
6932         struct osd_it_iam *it = (struct osd_it_iam *)di;
6933
6934         return iam_it_load(&it->oi_it, hash);
6935 }
6936
6937 static const struct dt_index_operations osd_index_iam_ops = {
6938         .dio_lookup         = osd_index_iam_lookup,
6939         .dio_declare_insert = osd_index_declare_iam_insert,
6940         .dio_insert         = osd_index_iam_insert,
6941         .dio_declare_delete = osd_index_declare_iam_delete,
6942         .dio_delete         = osd_index_iam_delete,
6943         .dio_it     = {
6944                 .init     = osd_it_iam_init,
6945                 .fini     = osd_it_iam_fini,
6946                 .get      = osd_it_iam_get,
6947                 .put      = osd_it_iam_put,
6948                 .next     = osd_it_iam_next,
6949                 .key      = osd_it_iam_key,
6950                 .key_size = osd_it_iam_key_size,
6951                 .rec      = osd_it_iam_rec,
6952                 .store    = osd_it_iam_store,
6953                 .load     = osd_it_iam_load
6954         }
6955 };
6956
6957 struct osd_it_ea *osd_it_dir_init(const struct lu_env *env,
6958                                   struct osd_device *dev,
6959                                   struct inode *inode, u32 attr)
6960 {
6961         struct osd_thread_info *info = osd_oti_get(env);
6962         struct osd_it_ea *oie;
6963         struct file *file;
6964
6965         ENTRY;
6966         file = alloc_file_pseudo(inode, dev->od_mnt, "/", O_NOATIME,
6967                                  inode->i_fop);
6968         if (IS_ERR(file))
6969                 RETURN(ERR_CAST(file));
6970
6971         /* Only FMODE_64BITHASH or FMODE_32BITHASH should be set, NOT both. */
6972         if (attr & LUDA_64BITHASH)
6973                 file->f_mode |= FMODE_64BITHASH;
6974         else
6975                 file->f_mode |= FMODE_32BITHASH;
6976         ihold(inode);
6977
6978         OBD_SLAB_ALLOC_PTR(oie, osd_itea_cachep);
6979         if (!oie)
6980                 goto out_fput;
6981
6982         oie->oie_rd_dirent       = 0;
6983         oie->oie_it_dirent       = 0;
6984         oie->oie_dirent          = NULL;
6985         if (unlikely(!info->oti_it_ea_buf_used)) {
6986                 oie->oie_buf = info->oti_it_ea_buf;
6987                 info->oti_it_ea_buf_used = 1;
6988         } else {
6989                 OBD_ALLOC(oie->oie_buf, OSD_IT_EA_BUFSIZE);
6990                 if (!oie->oie_buf)
6991                         goto out_free;
6992         }
6993         oie->oie_obj = NULL;
6994         oie->oie_file = file;
6995
6996         RETURN(oie);
6997
6998 out_free:
6999         OBD_SLAB_FREE_PTR(oie, osd_itea_cachep);
7000 out_fput:
7001         fput(file);
7002
7003         return ERR_PTR(-ENOMEM);
7004 }
7005
7006 /**
7007  * Creates or initializes iterator context.
7008  *
7009  * \retval struct osd_it_ea, iterator structure on success
7010  *
7011  */
7012 static struct dt_it *osd_it_ea_init(const struct lu_env *env,
7013                                     struct dt_object *dt,
7014                                     __u32 attr)
7015 {
7016         struct osd_object *obj = osd_dt_obj(dt);
7017         struct osd_device *dev = osd_obj2dev(obj);
7018         struct lu_object *lo = &dt->do_lu;
7019         struct osd_it_ea *oie;
7020
7021         ENTRY;
7022
7023         if (!dt_object_exists(dt) || obj->oo_destroyed)
7024                 RETURN(ERR_PTR(-ENOENT));
7025
7026         oie = osd_it_dir_init(env, dev, obj->oo_inode, attr);
7027         if (IS_ERR(oie))
7028                 RETURN(ERR_CAST(oie));
7029
7030         oie->oie_obj = obj;
7031         lu_object_get(lo);
7032         RETURN((struct dt_it *)oie);
7033 }
7034
7035 void osd_it_dir_fini(const struct lu_env *env, struct osd_it_ea *oie,
7036                      struct inode *inode)
7037 {
7038         struct osd_thread_info *info = osd_oti_get(env);
7039
7040         ENTRY;
7041         fput(oie->oie_file);
7042         if (unlikely(oie->oie_buf != info->oti_it_ea_buf))
7043                 OBD_FREE(oie->oie_buf, OSD_IT_EA_BUFSIZE);
7044         else
7045                 info->oti_it_ea_buf_used = 0;
7046         OBD_SLAB_FREE_PTR(oie, osd_itea_cachep);
7047         EXIT;
7048 }
7049
7050 /**
7051  * Destroy or finishes iterator context.
7052  *
7053  * \param di iterator structure to be destroyed
7054  */
7055 static void osd_it_ea_fini(const struct lu_env *env, struct dt_it *di)
7056 {
7057         struct osd_it_ea *oie = (struct osd_it_ea *)di;
7058         struct osd_object *obj = oie->oie_obj;
7059         struct inode *inode = obj->oo_inode;
7060
7061         ENTRY;
7062         osd_it_dir_fini(env, (struct osd_it_ea *)di, inode);
7063         osd_object_put(env, obj);
7064         EXIT;
7065 }
7066
7067 /**
7068  * It position the iterator at given key, so that next lookup continues from
7069  * that key Or it is similar to dio_it->load() but based on a key,
7070  * rather than file position.
7071  *
7072  * As a special convention, osd_it_ea_get(env, di, "") has to rewind iterator
7073  * to the beginning.
7074  *
7075  * TODO: Presently return +1 considering it is only used by mdd_dir_is_empty().
7076  */
7077 static int osd_it_ea_get(const struct lu_env *env,
7078                          struct dt_it *di, const struct dt_key *key)
7079 {
7080         struct osd_it_ea *it = (struct osd_it_ea *)di;
7081
7082         ENTRY;
7083         LASSERT(((const char *)key)[0] == '\0');
7084         it->oie_file->f_pos = 0;
7085         it->oie_rd_dirent = 0;
7086         it->oie_it_dirent = 0;
7087         it->oie_dirent = NULL;
7088
7089         RETURN(+1);
7090 }
7091
7092 /**
7093  * Does nothing
7094  */
7095 static void osd_it_ea_put(const struct lu_env *env, struct dt_it *di)
7096 {
7097 }
7098
7099 struct osd_filldir_cbs {
7100         struct dir_context ctx;
7101         struct osd_it_ea  *it;
7102 };
7103 /**
7104  * It is called internally by ->iterate*(). It fills the
7105  * iterator's in-memory data structure with required
7106  * information i.e. name, namelen, rec_size etc.
7107  *
7108  * \param buf in which information to be filled in.
7109  * \param name name of the file in given dir
7110  *
7111  * \retval 0 on success
7112  * \retval 1 on buffer full
7113  */
7114 #ifdef HAVE_FILLDIR_USE_CTX
7115 static FILLDIR_TYPE do_osd_ldiskfs_filldir(struct dir_context *ctx,
7116 #else
7117 static int osd_ldiskfs_filldir(void *ctx,
7118 #endif
7119                                const char *name, int namelen,
7120                                loff_t offset, __u64 ino, unsigned int d_type)
7121 {
7122         struct osd_it_ea *it = ((struct osd_filldir_cbs *)ctx)->it;
7123         struct osd_object *obj = it->oie_obj;
7124         struct osd_it_ea_dirent *ent = it->oie_dirent;
7125         struct lu_fid *fid = &ent->oied_fid;
7126         char *buf = it->oie_buf;
7127         struct osd_fid_pack *rec;
7128         ENTRY;
7129
7130         /* this should never happen */
7131         if (unlikely(namelen == 0 || namelen > LDISKFS_NAME_LEN)) {
7132                 CERROR("ldiskfs return invalid namelen %d\n", namelen);
7133                 RETURN(-EIO);
7134         }
7135
7136         /* Check for enough space. Note oied_name is not NUL terminated. */
7137         if (&ent->oied_name[namelen] > buf + OSD_IT_EA_BUFSIZE)
7138                 RETURN(1);
7139
7140         /* "." is just the object itself. */
7141         if (namelen == 1 && name[0] == '.') {
7142                 if (obj != NULL)
7143                         *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
7144         } else if (d_type & LDISKFS_DIRENT_LUFID) {
7145                 rec = (struct osd_fid_pack *)(name + namelen + 1);
7146                 if (osd_fid_unpack(fid, rec) != 0)
7147                         fid_zero(fid);
7148         } else {
7149                 fid_zero(fid);
7150         }
7151         d_type &= ~LDISKFS_DIRENT_LUFID;
7152
7153         /* NOT export local root. */
7154         if (obj != NULL &&
7155             unlikely(osd_sb(osd_obj2dev(obj))->s_root->d_inode->i_ino == ino)) {
7156                 ino = obj->oo_inode->i_ino;
7157                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
7158         }
7159
7160         if (obj == NULL || !(obj->oo_lma_flags & LUSTRE_ENCRYPT_FL)) {
7161                 ent->oied_namelen = namelen;
7162                 memcpy(ent->oied_name, name, namelen);
7163         } else {
7164                 int encoded_namelen = critical_chars(name, namelen);
7165
7166                 /* Check again for enough space. */
7167                 if (&ent->oied_name[encoded_namelen] > buf + OSD_IT_EA_BUFSIZE)
7168                         RETURN(1);
7169
7170                 ent->oied_namelen = encoded_namelen;
7171
7172                 if (encoded_namelen == namelen)
7173                         memcpy(ent->oied_name, name, namelen);
7174                 else
7175                         critical_encode(name, namelen, ent->oied_name);
7176         }
7177
7178         ent->oied_ino     = ino;
7179         ent->oied_off     = offset;
7180         ent->oied_type    = d_type;
7181
7182         it->oie_rd_dirent++;
7183         it->oie_dirent = (void *)ent + round_up(sizeof(*ent) + ent->oied_namelen, 8);
7184         RETURN(0);
7185 }
7186
7187 WRAP_FILLDIR_FN(do_, osd_ldiskfs_filldir)
7188
7189 /**
7190  * Calls ->iterate*() to load a directory entry at a time
7191  * and stored it in iterator's in-memory data structure.
7192  *
7193  * \param di iterator's in memory structure
7194  *
7195  * \retval   0 on success
7196  * \retval -ve on error
7197  * \retval +1 reach the end of entry
7198  */
7199 int osd_ldiskfs_it_fill(const struct lu_env *env, const struct dt_it *di)
7200 {
7201         struct osd_it_ea *it = (struct osd_it_ea *)di;
7202         struct osd_object *obj = it->oie_obj;
7203         struct htree_lock *hlock = NULL;
7204         struct file *filp = it->oie_file;
7205         int rc = 0;
7206         struct osd_filldir_cbs buf = {
7207                 .ctx.actor = osd_ldiskfs_filldir,
7208                 .it = it
7209         };
7210
7211         ENTRY;
7212         it->oie_dirent = it->oie_buf;
7213         it->oie_rd_dirent = 0;
7214
7215         if (obj) {
7216                 if (obj->oo_hl_head != NULL) {
7217                         hlock = osd_oti_get(env)->oti_hlock;
7218                         ldiskfs_htree_lock(hlock, obj->oo_hl_head,
7219                                            obj->oo_inode,
7220                                            LDISKFS_HLOCK_READDIR);
7221                 } else {
7222                         down_read(&obj->oo_ext_idx_sem);
7223                 }
7224         }
7225
7226         rc = iterate_dir(filp, &buf.ctx);
7227         if (rc)
7228                 GOTO(unlock, rc);
7229
7230         if (it->oie_rd_dirent == 0) {
7231                 /*
7232                  * If it does not get any dirent, it means it has been reached
7233                  * to the end of the dir
7234                  */
7235                 it->oie_file->f_pos = ldiskfs_get_htree_eof(it->oie_file);
7236                 if (rc == 0)
7237                         rc = 1;
7238         } else {
7239                 it->oie_dirent = it->oie_buf;
7240                 it->oie_it_dirent = 1;
7241         }
7242 unlock:
7243         if (obj) {
7244                 if (hlock != NULL)
7245                         ldiskfs_htree_unlock(hlock);
7246                 else
7247                         up_read(&obj->oo_ext_idx_sem);
7248         }
7249
7250         RETURN(rc);
7251 }
7252
7253 /**
7254  * It calls osd_ldiskfs_it_fill() which will use ->iterate*()
7255  * to load a directory entry at a time and stored it in
7256  * iterator's in-memory data structure.
7257  *
7258  * \param di iterator's in memory structure
7259  *
7260  * \retval +ve iterator reached to end
7261  * \retval   0 iterator not reached to end
7262  * \retval -ve on error
7263  */
7264 static int osd_it_ea_next(const struct lu_env *env, struct dt_it *di)
7265 {
7266         struct osd_it_ea *it = (struct osd_it_ea *)di;
7267         int rc;
7268
7269         ENTRY;
7270
7271         if (it->oie_it_dirent < it->oie_rd_dirent) {
7272                 it->oie_dirent =
7273                         (void *)it->oie_dirent +
7274                         round_up(sizeof(struct osd_it_ea_dirent) +
7275                                        it->oie_dirent->oied_namelen, 8);
7276                 it->oie_it_dirent++;
7277                 rc = 0;
7278         } else {
7279                 if (it->oie_file->f_pos == ldiskfs_get_htree_eof(it->oie_file))
7280                         rc = 1;
7281                 else
7282                         rc = osd_ldiskfs_it_fill(env, di);
7283         }
7284
7285         RETURN(rc);
7286 }
7287
7288 /**
7289  * Returns the key at current position from iterator's in memory structure.
7290  *
7291  * \param di iterator's in memory structure
7292  *
7293  * \retval key i.e. struct dt_key on success
7294  */
7295 static struct dt_key *osd_it_ea_key(const struct lu_env *env,
7296                                     const struct dt_it *di)
7297 {
7298         struct osd_it_ea *it = (struct osd_it_ea *)di;
7299
7300         return (struct dt_key *)it->oie_dirent->oied_name;
7301 }
7302
7303 /**
7304  * Returns key's size at current position from iterator's in memory structure.
7305  *
7306  * \param di iterator's in memory structure
7307  *
7308  * \retval key_size i.e. struct dt_key on success
7309  */
7310 static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
7311 {
7312         struct osd_it_ea *it = (struct osd_it_ea *)di;
7313
7314         return it->oie_dirent->oied_namelen;
7315 }
7316
7317 #if defined LDISKFS_DIR_ENTRY_LEN && defined LDISKFS_DIR_ENTRY_LEN_
7318 #undef LDISKFS_DIR_REC_LEN
7319 # if defined LDISKFS_DIR_REC_LEN_WITH_DIR
7320 #  define LDISKFS_DIR_REC_LEN(de, dir)  LDISKFS_DIR_ENTRY_LEN_((de), (dir))
7321 # else
7322 #  define LDISKFS_DIR_REC_LEN(de)       LDISKFS_DIR_ENTRY_LEN_((de))
7323 # endif
7324 #endif
7325
7326 #if defined LDISKFS_DIR_REC_LEN_WITH_DIR
7327 # define LDISKFS_DIR_REC_LEN_DIR(de)    LDISKFS_DIR_REC_LEN((de), NULL)
7328 #else
7329 # define LDISKFS_DIR_REC_LEN_DIR(de)    LDISKFS_DIR_REC_LEN((de))
7330 #endif
7331
7332 static inline bool osd_dotdot_has_space(struct ldiskfs_dir_entry_2 *de)
7333 {
7334         if (LDISKFS_DIR_REC_LEN_DIR(de) >=
7335             __LDISKFS_DIR_REC_LEN(2 + 1 + sizeof(struct osd_fid_pack)))
7336                 return true;
7337
7338         return false;
7339 }
7340
7341 static inline bool
7342 osd_dirent_has_space(struct ldiskfs_dir_entry_2 *de, __u16 namelen,
7343                      unsigned int blocksize, bool dotdot)
7344 {
7345         if (dotdot)
7346                 return osd_dotdot_has_space(de);
7347
7348         if (ldiskfs_rec_len_from_disk(de->rec_len, blocksize) >=
7349             __LDISKFS_DIR_REC_LEN(namelen + 1 + sizeof(struct osd_fid_pack)))
7350                 return true;
7351
7352         return false;
7353 }
7354
7355 static int
7356 osd_dirent_reinsert(const struct lu_env *env, struct osd_device *dev,
7357                     handle_t *jh, struct dentry *dentry,
7358                     const struct lu_fid *fid, struct buffer_head *bh,
7359                     struct ldiskfs_dir_entry_2 *de, struct htree_lock *hlock,
7360                     bool dotdot)
7361 {
7362         struct inode *dir = dentry->d_parent->d_inode;
7363         struct inode *inode = dentry->d_inode;
7364         struct osd_fid_pack *rec;
7365         struct ldiskfs_dentry_param *ldp;
7366         int namelen = dentry->d_name.len;
7367         int rc;
7368         struct osd_thread_info *info = osd_oti_get(env);
7369
7370         ENTRY;
7371
7372         if (!ldiskfs_has_feature_dirdata(inode->i_sb))
7373                 RETURN(0);
7374
7375         /* There is enough space to hold the FID-in-dirent. */
7376         if (osd_dirent_has_space(de, namelen, dir->i_sb->s_blocksize, dotdot)) {
7377                 rc = osd_ldiskfs_journal_get_write_access(jh, dir->i_sb, bh,
7378                                                           LDISKFS_JTR_NONE);
7379                 if (rc != 0)
7380                         RETURN(rc);
7381
7382                 de->name[namelen] = 0;
7383                 rec = (struct osd_fid_pack *)(de->name + namelen + 1);
7384                 rec->fp_len = sizeof(struct lu_fid) + 1;
7385                 fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
7386                 de->file_type |= LDISKFS_DIRENT_LUFID;
7387                 rc = ldiskfs_handle_dirty_metadata(jh, NULL, bh);
7388
7389                 RETURN(rc);
7390         }
7391
7392         LASSERT(!dotdot);
7393
7394         rc = ldiskfs_delete_entry(jh, dir, de, bh);
7395         if (rc != 0)
7396                 RETURN(rc);
7397
7398         ldp = (struct ldiskfs_dentry_param *)osd_oti_get(env)->oti_ldp;
7399         osd_get_ldiskfs_dirent_param(ldp, fid);
7400         dentry->d_fsdata = (void *)ldp;
7401         dquot_initialize(dir);
7402         rc = osd_ldiskfs_add_entry(info, dev, jh, dentry, inode, hlock);
7403         /*
7404          * It is too bad, we cannot reinsert the name entry back.
7405          * That means we lose it!
7406          */
7407         if (rc != 0)
7408                 CDEBUG(D_LFSCK,
7409                        "%s: fail to reinsert the dirent, dir = %lu/%u, name = %.*s, "DFID": rc = %d\n",
7410                        osd_ino2name(inode), dir->i_ino, dir->i_generation,
7411                        namelen, dentry->d_name.name, PFID(fid), rc);
7412
7413         RETURN(rc);
7414 }
7415
7416 static int
7417 osd_dirent_check_repair(const struct lu_env *env, struct osd_object *obj,
7418                         struct osd_it_ea *it, struct lu_fid *fid,
7419                         struct osd_inode_id *id, __u32 *attr)
7420 {
7421         struct osd_thread_info *info = osd_oti_get(env);
7422         struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
7423         struct osd_device *dev = osd_obj2dev(obj);
7424         struct super_block *sb = osd_sb(dev);
7425         const char *devname = osd_name(dev);
7426         struct osd_it_ea_dirent *ent = it->oie_dirent;
7427         struct inode *dir = obj->oo_inode;
7428         struct htree_lock *hlock = NULL;
7429         struct buffer_head *bh = NULL;
7430         handle_t *jh = NULL;
7431         struct ldiskfs_dir_entry_2 *de;
7432         struct dentry *dentry;
7433         struct inode *inode;
7434         const struct lu_fid *pfid = lu_object_fid(&obj->oo_dt.do_lu);
7435         int credits;
7436         int rc;
7437         bool dotdot = false;
7438         bool dirty = false;
7439         struct lu_name ln;
7440
7441         ENTRY;
7442
7443         if (ent->oied_name[0] == '.') {
7444                 if (ent->oied_namelen == 1)
7445                         RETURN(0);
7446
7447                 if (ent->oied_namelen == 2 && ent->oied_name[1] == '.')
7448                         dotdot = true;
7449         }
7450
7451         osd_id_gen(id, ent->oied_ino, OSD_OII_NOGEN);
7452         inode = osd_iget(info, dev, id);
7453         if (IS_ERR(inode)) {
7454                 rc = PTR_ERR(inode);
7455                 if (rc == -ENOENT || rc == -ESTALE) {
7456                         /*
7457                          * Maybe dangling name entry, or
7458                          * corrupted directory entry.
7459                          */
7460                         *attr |= LUDA_UNKNOWN;
7461                         rc = 0;
7462                 } else {
7463                         CDEBUG(D_LFSCK, "%s: fail to iget() for dirent "
7464                                "check_repair, dir = %lu/%u, name = %.*s, "
7465                                "ino = %llu, rc = %d\n",
7466                                devname, dir->i_ino, dir->i_generation,
7467                                ent->oied_namelen, ent->oied_name,
7468                                ent->oied_ino, rc);
7469                 }
7470
7471                 RETURN(rc);
7472         }
7473
7474         rc = obj_name2lu_name(obj, ent->oied_name, ent->oied_namelen, &ln);
7475         if (rc)
7476                 RETURN(rc);
7477
7478         dentry = osd_child_dentry_by_inode(env, dir, ln.ln_name, ln.ln_namelen);
7479         rc = osd_get_lma(info, inode, dentry, &info->oti_ost_attrs);
7480         if (rc == -ENODATA || !fid_is_sane(&lma->lma_self_fid))
7481                 lma = NULL;
7482         else if (rc != 0)
7483                 GOTO(out, rc);
7484
7485         /*
7486          * We need to ensure that the name entry is still valid.
7487          * Because it may be removed or renamed by other already.
7488          *
7489          * The unlink or rename operation will start journal before PDO lock,
7490          * so to avoid deadlock, here we need to start journal handle before
7491          * related PDO lock also. But because we do not know whether there
7492          * will be something to be repaired before PDO lock, we just start
7493          * journal without conditions.
7494          *
7495          * We may need to remove the name entry firstly, then insert back.
7496          * One credit is for user quota file update.
7497          * One credit is for group quota file update.
7498          * Two credits are for dirty inode.
7499          */
7500         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE] +
7501                   osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1 + 1 + 2;
7502
7503         if (dev->od_dirent_journal != 0) {
7504
7505 again:
7506                 jh = osd_journal_start_sb(sb, LDISKFS_HT_MISC, credits);
7507                 if (IS_ERR(jh)) {
7508                         rc = PTR_ERR(jh);
7509                         CDEBUG(D_LFSCK, "%s: fail to start trans for dirent "
7510                                "check_repair, dir = %lu/%u, credits = %d, "
7511                                "name = %.*s, ino = %llu: rc = %d\n",
7512                                devname, dir->i_ino, dir->i_generation, credits,
7513                                ent->oied_namelen, ent->oied_name,
7514                                ent->oied_ino, rc);
7515
7516                         GOTO(out_inode, rc);
7517                 }
7518
7519                 if (obj->oo_hl_head != NULL) {
7520                         hlock = osd_oti_get(env)->oti_hlock;
7521                         /*
7522                          * "0" means exclusive lock for the whole directory.
7523                          * We need to prevent others access such name entry
7524                          * during the delete + insert. Neither HLOCK_ADD nor
7525                          * HLOCK_DEL cannot guarantee the atomicity.
7526                          */
7527                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir, 0);
7528                 } else {
7529                         down_write(&obj->oo_ext_idx_sem);
7530                 }
7531         } else {
7532                 if (obj->oo_hl_head != NULL) {
7533                         hlock = osd_oti_get(env)->oti_hlock;
7534                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir,
7535                                            LDISKFS_HLOCK_LOOKUP);
7536                 } else {
7537                         down_read(&obj->oo_ext_idx_sem);
7538                 }
7539         }
7540
7541         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
7542         if (IS_ERR(bh) || le32_to_cpu(de->inode) != inode->i_ino) {
7543                 *attr |= LUDA_IGNORE;
7544
7545                 GOTO(out, rc = 0);
7546         }
7547
7548         /*
7549          * For dotdot entry, if there is not enough space to hold the
7550          * FID-in-dirent, just keep them there. It only happens when the
7551          * device upgraded from 1.8 or restored from MDT file-level backup.
7552          * For the whole directory, only dotdot entry have no FID-in-dirent
7553          * and needs to get FID from LMA when readdir, it will not affect the
7554          * performance much.
7555          */
7556         if (dotdot && !osd_dotdot_has_space(de)) {
7557                 *attr |= LUDA_UNKNOWN;
7558
7559                 GOTO(out, rc = 0);
7560         }
7561
7562         if (lma != NULL) {
7563                 if (lu_fid_eq(fid, &lma->lma_self_fid))
7564                         GOTO(out, rc = 0);
7565
7566                 if (unlikely(lma->lma_compat & LMAC_NOT_IN_OI)) {
7567                         struct lu_fid *tfid = &lma->lma_self_fid;
7568
7569                         if (likely(dotdot &&
7570                                    fid_seq(tfid) == FID_SEQ_LOCAL_FILE &&
7571                                    fid_oid(tfid) == REMOTE_PARENT_DIR_OID)) {
7572                                 /*
7573                                  * It must be REMOTE_PARENT_DIR and as the
7574                                  * 'dotdot' entry of remote directory
7575                                  */
7576                                 *attr |= LUDA_IGNORE;
7577                         } else {
7578                                 CDEBUG(D_LFSCK, "%s: expect remote agent "
7579                                        "parent directory, but got %.*s under "
7580                                        "dir = %lu/%u with the FID "DFID"\n",
7581                                        devname, ent->oied_namelen,
7582                                        ent->oied_name, dir->i_ino,
7583                                        dir->i_generation, PFID(tfid));
7584
7585                                 *attr |= LUDA_UNKNOWN;
7586                         }
7587
7588                         GOTO(out, rc = 0);
7589                 }
7590         }
7591
7592         if (!fid_is_zero(fid)) {
7593                 rc = osd_verify_ent_by_linkea(env, inode, pfid, ent->oied_name,
7594                                               ent->oied_namelen);
7595                 if (rc == -ENOENT ||
7596                     (rc == -ENODATA &&
7597                      !(dev->od_scrub.os_scrub.os_file.sf_flags & SF_UPGRADE))) {
7598                         /*
7599                          * linkEA does not recognize the dirent entry,
7600                          * it may because the dirent entry corruption
7601                          * and points to other's inode.
7602                          */
7603                         CDEBUG(D_LFSCK, "%s: the target inode does not "
7604                                "recognize the dirent, dir = %lu/%u, "
7605                                " name = %.*s, ino = %llu, "
7606                                DFID": rc = %d\n", devname, dir->i_ino,
7607                                dir->i_generation, ent->oied_namelen,
7608                                ent->oied_name, ent->oied_ino, PFID(fid), rc);
7609                         *attr |= LUDA_UNKNOWN;
7610
7611                         GOTO(out, rc = 0);
7612                 }
7613
7614                 if (rc && rc != -ENODATA) {
7615                         CDEBUG(D_LFSCK, "%s: fail to verify FID in the dirent, "
7616                                "dir = %lu/%u, name = %.*s, ino = %llu, "
7617                                DFID": rc = %d\n", devname, dir->i_ino,
7618                                dir->i_generation, ent->oied_namelen,
7619                                ent->oied_name, ent->oied_ino, PFID(fid), rc);
7620                         *attr |= LUDA_UNKNOWN;
7621
7622                         GOTO(out, rc = 0);
7623                 }
7624         }
7625
7626         if (lma != NULL) {
7627                 /*
7628                  * linkEA recognizes the dirent entry, the FID-in-LMA is
7629                  * valid, trusted, in spite of fid_is_sane(fid) or not.
7630                  */
7631                 if (*attr & LUDA_VERIFY_DRYRUN) {
7632                         *fid = lma->lma_self_fid;
7633                         *attr |= LUDA_REPAIR;
7634
7635                         GOTO(out, rc = 0);
7636                 }
7637
7638                 if (jh == NULL) {
7639                         brelse(bh);
7640                         dev->od_dirent_journal = 1;
7641                         if (hlock != NULL) {
7642                                 ldiskfs_htree_unlock(hlock);
7643                                 hlock = NULL;
7644                         } else {
7645                                 up_read(&obj->oo_ext_idx_sem);
7646                         }
7647
7648                         goto again;
7649                 }
7650
7651                 *fid = lma->lma_self_fid;
7652                 dirty = true;
7653                 /* Update or append the FID-in-dirent. */
7654                 rc = osd_dirent_reinsert(env, dev, jh, dentry, fid,
7655                                          bh, de, hlock, dotdot);
7656                 if (rc == 0)
7657                         *attr |= LUDA_REPAIR;
7658                 else
7659                         CDEBUG(D_LFSCK, "%s: fail to re-insert FID after "
7660                                "the dirent, dir = %lu/%u, name = %.*s, "
7661                                "ino = %llu, "DFID": rc = %d\n",
7662                                devname, dir->i_ino, dir->i_generation,
7663                                ent->oied_namelen, ent->oied_name,
7664                                ent->oied_ino, PFID(fid), rc);
7665         } else {
7666                 /* lma is NULL, trust the FID-in-dirent if it is valid. */
7667                 if (*attr & LUDA_VERIFY_DRYRUN) {
7668                         if (fid_is_sane(fid)) {
7669                                 *attr |= LUDA_REPAIR;
7670                         } else if (dev->od_index == 0) {
7671                                 lu_igif_build(fid, inode->i_ino,
7672                                               inode->i_generation);
7673                                 *attr |= LUDA_UPGRADE;
7674                         }
7675
7676                         GOTO(out, rc = 0);
7677                 }
7678
7679                 if (jh == NULL) {
7680                         brelse(bh);
7681                         dev->od_dirent_journal = 1;
7682                         if (hlock != NULL) {
7683                                 ldiskfs_htree_unlock(hlock);
7684                                 hlock = NULL;
7685                         } else {
7686                                 up_read(&obj->oo_ext_idx_sem);
7687                         }
7688
7689                         goto again;
7690                 }
7691
7692                 dirty = true;
7693                 if (unlikely(fid_is_sane(fid))) {
7694                         /*
7695                          * FID-in-dirent exists, but FID-in-LMA is lost.
7696                          * Trust the FID-in-dirent, and add FID-in-LMA.
7697                          */
7698                         rc = osd_ea_fid_set(info, inode, fid, 0, 0);
7699                         if (rc == 0)
7700                                 *attr |= LUDA_REPAIR;
7701                         else
7702                                 CDEBUG(D_LFSCK, "%s: fail to set LMA for "
7703                                        "update dirent, dir = %lu/%u, "
7704                                        "name = %.*s, ino = %llu, "
7705                                        DFID": rc = %d\n",
7706                                        devname, dir->i_ino, dir->i_generation,
7707                                        ent->oied_namelen, ent->oied_name,
7708                                        ent->oied_ino, PFID(fid), rc);
7709                 } else if (dev->od_index == 0) {
7710                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
7711                         /*
7712                          * It is probably IGIF object. Only aappend the
7713                          * FID-in-dirent. OI scrub will process FID-in-LMA.
7714                          */
7715                         rc = osd_dirent_reinsert(env, dev, jh, dentry, fid,
7716                                                  bh, de, hlock, dotdot);
7717                         if (rc == 0)
7718                                 *attr |= LUDA_UPGRADE;
7719                         else
7720                                 CDEBUG(D_LFSCK, "%s: fail to append IGIF "
7721                                        "after the dirent, dir = %lu/%u, "
7722                                        "name = %.*s, ino = %llu, "
7723                                        DFID": rc = %d\n",
7724                                        devname, dir->i_ino, dir->i_generation,
7725                                        ent->oied_namelen, ent->oied_name,
7726                                        ent->oied_ino, PFID(fid), rc);
7727                 }
7728         }
7729
7730         GOTO(out, rc);
7731
7732 out:
7733         if (!IS_ERR(bh))
7734                 brelse(bh);
7735         if (hlock != NULL) {
7736                 ldiskfs_htree_unlock(hlock);
7737         } else {
7738                 if (dev->od_dirent_journal != 0)
7739                         up_write(&obj->oo_ext_idx_sem);
7740                 else
7741                         up_read(&obj->oo_ext_idx_sem);
7742         }
7743
7744         if (jh != NULL)
7745                 ldiskfs_journal_stop(jh);
7746
7747 out_inode:
7748         iput(inode);
7749         if (rc >= 0 && !dirty)
7750                 dev->od_dirent_journal = 0;
7751         if (ln.ln_name != ent->oied_name)
7752                 kfree(ln.ln_name);
7753
7754         return rc;
7755 }
7756
7757 /**
7758  * Returns the value at current position from iterator's in memory structure.
7759  *
7760  * \param di struct osd_it_ea, iterator's in memory structure
7761  * \param attr attr requested for dirent.
7762  * \param lde lustre dirent
7763  *
7764  * \retval   0 no error and \param lde has correct lustre dirent.
7765  * \retval -ve on error
7766  */
7767 static inline int osd_it_ea_rec(const struct lu_env *env,
7768                                 const struct dt_it *di,
7769                                 struct dt_rec *dtrec, __u32 attr)
7770 {
7771         struct osd_it_ea       *it    = (struct osd_it_ea *)di;
7772         struct osd_object      *obj   = it->oie_obj;
7773         struct osd_device      *dev   = osd_obj2dev(obj);
7774         struct osd_thread_info *oti   = osd_oti_get(env);
7775         struct osd_inode_id    *id    = &oti->oti_id;
7776         struct lu_fid          *fid   = &it->oie_dirent->oied_fid;
7777         struct lu_dirent       *lde   = (struct lu_dirent *)dtrec;
7778         __u32 ino = it->oie_dirent->oied_ino;
7779         int rc = 0;
7780
7781         ENTRY;
7782
7783         LASSERT(!is_remote_parent_ino(dev, obj->oo_inode->i_ino));
7784
7785         if (attr & LUDA_VERIFY) {
7786                 if (unlikely(is_remote_parent_ino(dev, ino))) {
7787                         attr |= LUDA_IGNORE;
7788                         /*
7789                          * If the parent is on remote MDT, and there
7790                          * is no FID-in-dirent, then we have to get
7791                          * the parent FID from the linkEA.
7792                          */
7793                         if (!fid_is_sane(fid) &&
7794                             it->oie_dirent->oied_namelen == 2 &&
7795                             it->oie_dirent->oied_name[0] == '.' &&
7796                             it->oie_dirent->oied_name[1] == '.')
7797                                 osd_get_pfid_from_linkea(env, obj, fid);
7798                 } else {
7799                         rc = osd_dirent_check_repair(env, obj, it, fid, id,
7800                                                      &attr);
7801                 }
7802
7803                 if (!fid_is_sane(fid))
7804                         attr |= LUDA_UNKNOWN;
7805         } else {
7806                 attr &= ~LU_DIRENT_ATTRS_MASK;
7807                 if (!fid_is_sane(fid)) {
7808                         bool is_dotdot = false;
7809
7810                         if (it->oie_dirent->oied_namelen == 2 &&
7811                             it->oie_dirent->oied_name[0] == '.' &&
7812                             it->oie_dirent->oied_name[1] == '.')
7813                                 is_dotdot = true;
7814                         /*
7815                          * If the parent is on remote MDT, and there
7816                          * is no FID-in-dirent, then we have to get
7817                          * the parent FID from the linkEA.
7818                          */
7819                         if (is_remote_parent_ino(dev, ino) && is_dotdot) {
7820                                 rc = osd_get_pfid_from_linkea(env, obj, fid);
7821                         } else {
7822                                 if (is_dotdot == false &&
7823                                     CFS_FAIL_CHECK(OBD_FAIL_FID_LOOKUP))
7824                                         RETURN(-ENOENT);
7825
7826                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
7827                         }
7828                 }
7829         }
7830
7831         /* Pack the entry anyway, at least the offset is right. */
7832         osd_it_pack_dirent(lde, fid, it->oie_dirent->oied_off,
7833                            it->oie_dirent->oied_name,
7834                            it->oie_dirent->oied_namelen,
7835                            it->oie_dirent->oied_type, attr);
7836
7837         RETURN(rc > 0 ? 0 : rc);
7838 }
7839
7840 /**
7841  * Returns the record size size at current position.
7842  *
7843  * This function will return record(lu_dirent) size in bytes.
7844  *
7845  * \param[in] env       execution environment
7846  * \param[in] di        iterator's in memory structure
7847  * \param[in] attr      attribute of the entry, only requires LUDA_TYPE to
7848  *                      calculate the lu_dirent size.
7849  *
7850  * \retval      record size(in bytes & in memory) of the current lu_dirent
7851  *              entry.
7852  */
7853 static int osd_it_ea_rec_size(const struct lu_env *env, const struct dt_it *di,
7854                               __u32 attr)
7855 {
7856         struct osd_it_ea *it = (struct osd_it_ea *)di;
7857
7858         return lu_dirent_calc_size(it->oie_dirent->oied_namelen, attr);
7859 }
7860
7861 /**
7862  * Returns a cookie for current position of the iterator head, so that
7863  * user can use this cookie to load/start the iterator next time.
7864  *
7865  * \param di iterator's in memory structure
7866  *
7867  * \retval cookie for current position, on success
7868  */
7869 static __u64 osd_it_ea_store(const struct lu_env *env, const struct dt_it *di)
7870 {
7871         struct osd_it_ea *it = (struct osd_it_ea *)di;
7872
7873         return it->oie_dirent->oied_off;
7874 }
7875
7876 /**
7877  * It calls osd_ldiskfs_it_fill() which will use ->iterate*()
7878  * to load a directory entry at a time and stored it i inn,
7879  * in iterator's in-memory data structure.
7880  *
7881  * \param di struct osd_it_ea, iterator's in memory structure
7882  *
7883  * \retval +ve on success
7884  * \retval -ve on error
7885  */
7886 static int osd_it_ea_load(const struct lu_env *env,
7887                           const struct dt_it *di, __u64 hash)
7888 {
7889         struct osd_it_ea *it = (struct osd_it_ea *)di;
7890         int rc;
7891
7892         ENTRY;
7893         it->oie_file->f_pos = hash;
7894
7895         rc =  osd_ldiskfs_it_fill(env, di);
7896         if (rc > 0)
7897                 rc = -ENODATA;
7898
7899         if (rc == 0)
7900                 rc = 1;
7901
7902         RETURN(rc);
7903 }
7904
7905 int osd_olc_lookup(const struct lu_env *env, struct osd_object *obj,
7906                           u64 iversion, struct dt_rec *rec,
7907                           const struct lu_name *ln, int *result)
7908 {
7909         struct osd_thread_info *oti = osd_oti_get(env);
7910         struct osd_lookup_cache *olc = oti->oti_lookup_cache;
7911         struct osd_device *osd = osd_obj2dev(obj);
7912         struct osd_lookup_cache_object *cobj = &oti->oti_cobj;
7913         int i;
7914
7915         if (unlikely(olc == NULL))
7916                 return 0;
7917
7918         if (unlikely(atomic_read(&osd_mount_seq) != olc->olc_mount_seq)) {
7919                 /*
7920                  * umount has happened, a new OSD could land to the previous
7921                  * address so we can't use it any more, invalidate our cache
7922                  */
7923                 memset(olc, 0, sizeof(*olc));
7924                 olc->olc_mount_seq = atomic_read(&osd_mount_seq);
7925                 return 0;
7926         }
7927
7928         memset(cobj, 0, sizeof(*cobj));
7929         cobj->lco_osd = osd;
7930         cobj->lco_ino = obj->oo_inode->i_ino;
7931         cobj->lco_gen = obj->oo_inode->i_generation;
7932         cobj->lco_version = iversion;
7933
7934         for (i = 0; i < OSD_LOOKUP_CACHE_MAX; i++) {
7935                 struct osd_lookup_cache_entry *entry;
7936
7937                 entry = &olc->olc_entry[i];
7938                 /* compare if osd/ino/generation/version match */
7939                 if (memcmp(&entry->lce_obj, cobj, sizeof(*cobj)) != 0)
7940                         continue;
7941                 if (entry->lce_namelen != ln->ln_namelen)
7942                         continue;
7943                 if (memcmp(entry->lce_name, ln->ln_name, ln->ln_namelen) != 0)
7944                         continue;
7945                 /* match */
7946                 memcpy(rec, &entry->lce_fid, sizeof(entry->lce_fid));
7947                 *result = entry->lce_rc;
7948                 return 1;
7949         }
7950         return 0;
7951 }
7952
7953 void osd_olc_save(const struct lu_env *env, struct osd_object *obj,
7954                           struct dt_rec *rec, const struct lu_name *ln,
7955                           const int result, u64 iversion)
7956 {
7957         struct osd_thread_info *oti = osd_oti_get(env);
7958         struct osd_lookup_cache_entry *entry;
7959         struct osd_lookup_cache *olc;
7960
7961         if (unlikely(oti->oti_lookup_cache == NULL)) {
7962                 OBD_ALLOC_PTR(oti->oti_lookup_cache);
7963                 if (oti->oti_lookup_cache == NULL)
7964                         return;
7965         }
7966
7967         olc = oti->oti_lookup_cache;
7968         if (unlikely(atomic_read(&osd_mount_seq) != olc->olc_mount_seq)) {
7969                 memset(olc, 0, sizeof(*olc));
7970                 olc->olc_mount_seq = atomic_read(&osd_mount_seq);
7971         }
7972
7973         entry = &olc->olc_entry[olc->olc_cur];
7974
7975         /* invaliate cache slot if needed */
7976         if (entry->lce_obj.lco_osd)
7977                 memset(&entry->lce_obj, 0, sizeof(entry->lce_obj));
7978
7979         /* XXX: some kind of LRU */
7980         entry->lce_obj.lco_osd = osd_obj2dev(obj);
7981         entry->lce_obj.lco_ino = obj->oo_inode->i_ino;
7982         entry->lce_obj.lco_gen = obj->oo_inode->i_generation;
7983         entry->lce_obj.lco_version = iversion;
7984
7985         LASSERT(ln->ln_namelen <= LDISKFS_NAME_LEN + 1);
7986         entry->lce_namelen = ln->ln_namelen;
7987         memcpy(entry->lce_name, ln->ln_name, ln->ln_namelen);
7988         memcpy(&entry->lce_fid, rec, sizeof(entry->lce_fid));
7989         entry->lce_rc = result;
7990
7991         if (++olc->olc_cur == OSD_LOOKUP_CACHE_MAX)
7992                 olc->olc_cur = 0;
7993 }
7994
7995 /**
7996  * Index lookup function for interoperability mode (b11826).
7997  *
7998  * \param key,  key i.e. file name to be searched
7999  *
8000  * \retval +ve, on success
8001  * \retval -ve, on error
8002  */
8003 static int osd_index_ea_lookup(const struct lu_env *env, struct dt_object *dt,
8004                                struct dt_rec *rec, const struct dt_key *key)
8005 {
8006         struct osd_object *obj = osd_dt_obj(dt);
8007         struct lu_name ln;
8008         int rc, result;
8009         u64 iversion;
8010
8011         ENTRY;
8012
8013         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
8014         LINVRNT(osd_invariant(obj));
8015
8016         rc = obj_name2lu_name(obj, (char *)key, strlen((char *)key), &ln);
8017         if (rc)
8018                 RETURN(rc);
8019
8020         /*
8021          * grab version before actual lookup, so that we recognize potential
8022          * insert between osd_ea_lookup_rec() and osd_olc_save()
8023          */
8024         iversion = inode_peek_iversion(obj->oo_inode);
8025
8026         if (osd_olc_lookup(env, obj, iversion, rec, &ln, &result))
8027                 GOTO(out, rc = result);
8028
8029         rc = osd_ea_lookup_rec(env, obj, rec, &ln);
8030         if (rc == 0)
8031                 rc = 1;
8032
8033         osd_olc_save(env, obj, rec, &ln, rc, iversion);
8034
8035 out:
8036         if (ln.ln_name != (char *)key)
8037                 kfree(ln.ln_name);
8038         RETURN(rc);
8039 }
8040
8041 /**
8042  * Index and Iterator operations for interoperability
8043  * mode (i.e. to run 2.0 mds on 1.8 disk) (b11826)
8044  */
8045 static const struct dt_index_operations osd_index_ea_ops = {
8046         .dio_lookup         = osd_index_ea_lookup,
8047         .dio_declare_insert = osd_index_declare_ea_insert,
8048         .dio_insert         = osd_index_ea_insert,
8049         .dio_declare_delete = osd_index_declare_ea_delete,
8050         .dio_delete         = osd_index_ea_delete,
8051         .dio_it     = {
8052                 .init     = osd_it_ea_init,
8053                 .fini     = osd_it_ea_fini,
8054                 .get      = osd_it_ea_get,
8055                 .put      = osd_it_ea_put,
8056                 .next     = osd_it_ea_next,
8057                 .key      = osd_it_ea_key,
8058                 .key_size = osd_it_ea_key_size,
8059                 .rec      = osd_it_ea_rec,
8060                 .rec_size = osd_it_ea_rec_size,
8061                 .store    = osd_it_ea_store,
8062                 .load     = osd_it_ea_load
8063         }
8064 };
8065
8066 static void *osd_key_init(const struct lu_context *ctx,
8067                           struct lu_context_key *key)
8068 {
8069         struct osd_thread_info *info;
8070
8071         OBD_ALLOC_PTR(info);
8072         if (info == NULL)
8073                 return ERR_PTR(-ENOMEM);
8074
8075         OBD_ALLOC(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
8076         if (info->oti_it_ea_buf == NULL)
8077                 goto out_free_info;
8078
8079         info->oti_env = container_of(ctx, struct lu_env, le_ctx);
8080
8081         info->oti_hlock = ldiskfs_htree_lock_alloc();
8082         if (info->oti_hlock == NULL)
8083                 goto out_free_ea;
8084
8085         return info;
8086
8087 out_free_ea:
8088         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
8089 out_free_info:
8090         OBD_FREE_PTR(info);
8091         return ERR_PTR(-ENOMEM);
8092 }
8093
8094 static void osd_key_fini(const struct lu_context *ctx,
8095                          struct lu_context_key *key, void *data)
8096 {
8097         struct osd_thread_info *info = data;
8098         struct ldiskfs_inode_info *lli = LDISKFS_I(info->oti_inode);
8099         struct osd_idmap_cache *idc = info->oti_ins_cache;
8100
8101         if (info->oti_dio_pages) {
8102                 int i;
8103                 for (i = 0; i < PTLRPC_MAX_BRW_PAGES; i++) {
8104                         struct page *page = info->oti_dio_pages[i];
8105                         if (page) {
8106                                 LASSERT(PagePrivate2(page));
8107                                 LASSERT(PageLocked(page));
8108                                 ClearPagePrivate2(page);
8109                                 unlock_page(page);
8110                                 __free_page(page);
8111                         }
8112                 }
8113                 OBD_FREE_PTR_ARRAY_LARGE(info->oti_dio_pages,
8114                                          PTLRPC_MAX_BRW_PAGES);
8115         }
8116
8117         if (info->oti_inode != NULL)
8118                 OBD_FREE_PTR(lli);
8119         if (info->oti_hlock != NULL)
8120                 ldiskfs_htree_lock_free(info->oti_hlock);
8121         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
8122         lu_buf_free(&info->oti_iobuf.dr_bl_buf);
8123         lu_buf_free(&info->oti_iobuf.dr_lnb_buf);
8124         lu_buf_free(&info->oti_big_buf);
8125         if (idc != NULL) {
8126                 LASSERT(info->oti_ins_cache_size > 0);
8127                 OBD_FREE_PTR_ARRAY_LARGE(idc, info->oti_ins_cache_size);
8128                 info->oti_ins_cache = NULL;
8129                 info->oti_ins_cache_size = 0;
8130         }
8131         if (info->oti_lookup_cache)
8132                 OBD_FREE_PTR(info->oti_lookup_cache);
8133         OBD_FREE_PTR(info);
8134 }
8135
8136 static void osd_key_exit(const struct lu_context *ctx,
8137                          struct lu_context_key *key, void *data)
8138 {
8139         struct osd_thread_info *info = data;
8140         struct osd_lookup_cache *olc = info->oti_lookup_cache;
8141
8142         if (olc)
8143                 memset(olc, 0, sizeof(*olc));
8144         LASSERT(info->oti_r_locks == 0);
8145         LASSERT(info->oti_w_locks == 0);
8146         LASSERT(info->oti_txns    == 0);
8147         LASSERTF(info->oti_dio_pages_used == 0, "%d\n",
8148                  info->oti_dio_pages_used);
8149 }
8150
8151 /* type constructor/destructor: osd_type_init, osd_type_fini */
8152 LU_TYPE_INIT_FINI(osd, &osd_key);
8153
8154 struct lu_context_key osd_key = {
8155         .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL,
8156         .lct_init = osd_key_init,
8157         .lct_fini = osd_key_fini,
8158         .lct_exit = osd_key_exit
8159 };
8160
8161
8162 static int osd_device_init(const struct lu_env *env, struct lu_device *d,
8163                            const char *name, struct lu_device *next)
8164 {
8165         struct osd_device *osd = osd_dev(d);
8166
8167         if (strlcpy(osd->od_svname, name, sizeof(osd->od_svname)) >=
8168             sizeof(osd->od_svname))
8169                 return -E2BIG;
8170         return osd_procfs_init(osd, name);
8171 }
8172
8173 static int osd_fid_init(const struct lu_env *env, struct osd_device *osd)
8174 {
8175         struct seq_server_site *ss = osd_seq_site(osd);
8176         int rc = 0;
8177
8178         ENTRY;
8179
8180         if (osd->od_is_ost || osd->od_cl_seq != NULL)
8181                 RETURN(0);
8182
8183         if (unlikely(ss == NULL))
8184                 RETURN(-ENODEV);
8185
8186         OBD_ALLOC_PTR(osd->od_cl_seq);
8187         if (osd->od_cl_seq == NULL)
8188                 RETURN(-ENOMEM);
8189
8190         seq_client_init(osd->od_cl_seq, NULL, LUSTRE_SEQ_METADATA,
8191                         osd->od_svname, ss->ss_server_seq);
8192
8193         if (ss->ss_node_id == 0) {
8194                 /*
8195                  * If the OSD on the sequence controller(MDT0), then allocate
8196                  * sequence here, otherwise allocate sequence after connected
8197                  * to MDT0 (see mdt_register_lwp_callback()).
8198                  */
8199                 rc = seq_server_alloc_meta(osd->od_cl_seq->lcs_srv,
8200                                    &osd->od_cl_seq->lcs_space, env);
8201         }
8202
8203         RETURN(rc);
8204 }
8205
8206 static void osd_fid_fini(const struct lu_env *env, struct osd_device *osd)
8207 {
8208         if (osd->od_cl_seq == NULL)
8209                 return;
8210
8211         seq_client_fini(osd->od_cl_seq);
8212         OBD_FREE_PTR(osd->od_cl_seq);
8213         osd->od_cl_seq = NULL;
8214 }
8215
8216 static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
8217 {
8218         ENTRY;
8219
8220         /* shutdown quota slave instance associated with the device */
8221         if (o->od_quota_slave_md != NULL) {
8222                 struct qsd_instance *qsd = o->od_quota_slave_md;
8223
8224                 o->od_quota_slave_md = NULL;
8225                 qsd_fini(env, qsd);
8226         }
8227
8228         if (o->od_quota_slave_dt != NULL) {
8229                 struct qsd_instance *qsd = o->od_quota_slave_dt;
8230
8231                 o->od_quota_slave_dt = NULL;
8232                 qsd_fini(env, qsd);
8233         }
8234
8235         osd_fid_fini(env, o);
8236         osd_scrub_cleanup(env, o);
8237
8238         RETURN(0);
8239 }
8240
8241 #ifdef HAVE_FLUSH_DELAYED_FPUT
8242 # define cfs_flush_delayed_fput() flush_delayed_fput()
8243 #else
8244 void (*cfs_flush_delayed_fput)(void);
8245 #endif /* HAVE_FLUSH_DELAYED_FPUT */
8246
8247 static void osd_umount(const struct lu_env *env, struct osd_device *o)
8248 {
8249         ENTRY;
8250
8251         atomic_inc(&osd_mount_seq);
8252
8253         if (o->od_mnt != NULL) {
8254                 shrink_dcache_sb(osd_sb(o));
8255                 osd_sync(env, &o->od_dt_dev);
8256                 wait_event(o->od_commit_cb_done,
8257                           !atomic_read(&o->od_commit_cb_in_flight));
8258
8259                 mntput(o->od_mnt);
8260                 o->od_mnt = NULL;
8261         }
8262
8263         /* to be sure all delayed fput are finished */
8264         cfs_flush_delayed_fput();
8265
8266         EXIT;
8267 }
8268
8269 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 53, 0)
8270 # ifndef LDISKFS_HAS_INCOMPAT_FEATURE
8271 /* Newer kernels provide the ldiskfs_set_feature_largedir() wrapper already,
8272  * which calls ldiskfs_update_dynamic_rev() to update ancient filesystems.
8273  * All ldiskfs filesystems are already v2, so it is a no-op and unnecessary.
8274  * This avoids maintaining patches to export this otherwise-useless function.
8275  */
8276 void ldiskfs_update_dynamic_rev(struct super_block *sb)
8277 {
8278         /* do nothing */
8279 }
8280 # endif
8281 #endif
8282
8283 static int osd_mount(const struct lu_env *env,
8284                      struct osd_device *o, struct lustre_cfg *cfg)
8285 {
8286         const char *name = lustre_cfg_string(cfg, 0);
8287         const char *dev = lustre_cfg_string(cfg, 1);
8288         const char *opts;
8289         unsigned long page, s_flags = 0, lmd_flags = 0;
8290         struct page *__page;
8291         struct file_system_type *type;
8292         char *options = NULL;
8293         const char *str;
8294         struct osd_thread_info *info = osd_oti_get(env);
8295         struct lu_fid *fid = &info->oti_fid;
8296         struct inode *inode;
8297         int rc = 0, force_over_1024tb = 0;
8298
8299         ENTRY;
8300
8301         if (o->od_mnt != NULL)
8302                 RETURN(0);
8303
8304         if (strlen(dev) >= sizeof(o->od_mntdev))
8305                 RETURN(-E2BIG);
8306         strcpy(o->od_mntdev, dev);
8307
8308         str = lustre_cfg_buf(cfg, 2);
8309         sscanf(str, "%lu:%lu", &s_flags, &lmd_flags);
8310
8311         opts = lustre_cfg_string(cfg, 3);
8312 #ifdef __BIG_ENDIAN
8313         if (opts == NULL || strstr(opts, "bigendian_extents") == NULL) {
8314                 CERROR("%s: device %s extents feature is not guaranteed to "
8315                        "work on big-endian systems. Use \"bigendian_extents\" "
8316                        "mount option to override.\n", name, dev);
8317                 RETURN(-EINVAL);
8318         }
8319 #endif
8320 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
8321         if (opts != NULL && strstr(opts, "force_over_128tb") != NULL) {
8322                 CWARN("force_over_128tb option is deprecated.  Filesystems smaller than 1024TB can be created without any force option. Use force_over_1024tb option for filesystems larger than 1024TB.\n");
8323         }
8324 #endif
8325 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 1, 53, 0)
8326         if (opts != NULL && strstr(opts, "force_over_256tb") != NULL) {
8327                 CWARN("force_over_256tb option is deprecated.  Filesystems smaller than 1024TB can be created without any force options. Use force_over_1024tb option for filesystems larger than 1024TB.\n");
8328         }
8329 #endif
8330 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 53, 0)
8331         if (opts != NULL && strstr(opts, "force_over_512tb") != NULL) {
8332                 CWARN("force_over_512tb option is deprecated.  Filesystems smaller than 1024TB can be created without any force options. Use force_over_1024tb option for filesystems larger than 1024TB.\n");
8333         }
8334 #endif
8335
8336         if (opts != NULL && strstr(opts, "force_over_1024tb") != NULL)
8337                 force_over_1024tb = 1;
8338
8339         __page = alloc_page(GFP_KERNEL);
8340         if (__page == NULL)
8341                 GOTO(out, rc = -ENOMEM);
8342         page = (unsigned long)page_address(__page);
8343         options = (char *)page;
8344         *options = '\0';
8345         if (opts != NULL) {
8346                 /* strip out the options for back compatiblity */
8347                 static const char * const sout[] = {
8348                         "mballoc",
8349                         "iopen",
8350                         "noiopen",
8351                         "iopen_nopriv",
8352                         "extents",
8353                         "noextents",
8354                         /* strip out option we processed in osd */
8355                         "bigendian_extents",
8356                         "force_over_128tb",
8357                         "force_over_256tb",
8358                         "force_over_512tb",
8359                         "force_over_1024tb",
8360                         "resetoi",
8361                         NULL
8362                 };
8363                 strncat(options, opts, PAGE_SIZE);
8364                 for (rc = 0, str = options; sout[rc]; ) {
8365                         char *op = strstr(str, sout[rc]);
8366
8367                         if (op == NULL) {
8368                                 rc++;
8369                                 str = options;
8370                                 continue;
8371                         }
8372                         if (op == options || *(op - 1) == ',') {
8373                                 str = op + strlen(sout[rc]);
8374                                 if (*str == ',' || *str == '\0') {
8375                                         *str == ',' ? str++ : str;
8376                                         memmove(op, str, strlen(str) + 1);
8377                                 }
8378                         }
8379                         for (str = op; *str != ',' && *str != '\0'; str++)
8380                                 ;
8381                 }
8382         } else {
8383                 strncat(options, "user_xattr,acl", PAGE_SIZE);
8384         }
8385
8386         /* Glom up mount options */
8387         if (*options != '\0')
8388                 strncat(options, ",", PAGE_SIZE);
8389         strncat(options, "no_mbcache,nodelalloc", PAGE_SIZE);
8390
8391         type = get_fs_type("ldiskfs");
8392         if (!type) {
8393                 CERROR("%s: cannot find ldiskfs module\n", name);
8394                 GOTO(out, rc = -ENODEV);
8395         }
8396
8397         s_flags |= SB_KERNMOUNT;
8398         o->od_mnt = vfs_kern_mount(type, s_flags, dev, options);
8399         module_put(type->owner);
8400
8401         if (IS_ERR(o->od_mnt)) {
8402                 rc = PTR_ERR(o->od_mnt);
8403                 o->od_mnt = NULL;
8404                 CERROR("%s: can't mount %s: %d\n", name, dev, rc);
8405                 GOTO(out, rc);
8406         }
8407
8408         if (ldiskfs_blocks_count(LDISKFS_SB(osd_sb(o))->s_es) <<
8409                                  osd_sb(o)->s_blocksize_bits > 1024ULL << 40 &&
8410                                  force_over_1024tb == 0) {
8411                 CERROR("%s: device %s LDISKFS has not been tested on filesystems larger than 1024TB and may cause data corruption. Use 'force_over_1024tb' mount option to override.\n",
8412                        name, dev);
8413                 GOTO(out_mnt, rc = -EINVAL);
8414         }
8415
8416         if (test_bit(LMD_FLG_DEV_RDONLY, &lmd_flags)) {
8417                 LCONSOLE_WARN("%s: not support dev_rdonly on this device\n",
8418                               name);
8419
8420                 GOTO(out_mnt, rc = -EOPNOTSUPP);
8421         }
8422
8423         if (!ldiskfs_has_feature_journal(o->od_mnt->mnt_sb)) {
8424                 CERROR("%s: device %s is mounted w/o journal\n", name, dev);
8425                 GOTO(out_mnt, rc = -EINVAL);
8426         }
8427
8428         if (ldiskfs_has_feature_fast_commit(o->od_mnt->mnt_sb)) {
8429                 CERROR("%s: device %s is mounted with fast_commit that breaks recovery\n",
8430                        name, dev);
8431                 GOTO(out_mnt, rc = -EOPNOTSUPP);
8432         }
8433
8434 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 53, 0)
8435 #ifdef LDISKFS_MOUNT_DIRDATA
8436         if (ldiskfs_has_feature_dirdata(o->od_mnt->mnt_sb))
8437                 LDISKFS_SB(osd_sb(o))->s_mount_opt |= LDISKFS_MOUNT_DIRDATA;
8438         else if (strstr(name, "MDT")) /* don't complain for MGT or OSTs */
8439                 CWARN("%s: device %s was upgraded from Lustre-1.x without "
8440                       "enabling the dirdata feature. If you do not want to "
8441                       "downgrade to Lustre-1.x again, you can enable it via "
8442                       "'tune2fs -O dirdata device'\n", name, dev);
8443 #endif
8444         /* enable large_dir on MDTs to avoid REMOTE_PARENT_DIR overflow,
8445          * and on very large OSTs to avoid object directory overflow */
8446         if (unlikely(!ldiskfs_has_feature_largedir(o->od_mnt->mnt_sb) &&
8447                      !strstr(name, "MGS"))) {
8448                 ldiskfs_set_feature_largedir(o->od_mnt->mnt_sb);
8449                 LCONSOLE_INFO("%s: enabled 'large_dir' feature on device %s\n",
8450                               name, dev);
8451         }
8452 #endif
8453         inode = osd_sb(o)->s_root->d_inode;
8454         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
8455         if (!o->od_dt_dev.dd_rdonly) {
8456                 rc = osd_ea_fid_set(info, inode, fid, LMAC_NOT_IN_OI, 0);
8457                 if (rc != 0) {
8458                         CERROR("%s: failed to set lma on %s root inode\n",
8459                                name, dev);
8460                         GOTO(out_mnt, rc);
8461                 }
8462         }
8463
8464         if (test_bit(LMD_FLG_NOSCRUB, &lmd_flags))
8465                 o->od_scrub.os_scrub.os_auto_scrub_interval = AS_NEVER;
8466
8467         if (blk_queue_nonrot(bdev_get_queue(osd_sb(o)->s_bdev))) {
8468                 /* do not use pagecache with flash-backed storage */
8469                 o->od_writethrough_cache = 0;
8470                 o->od_read_cache = 0;
8471         }
8472
8473         GOTO(out, rc = 0);
8474
8475 out_mnt:
8476         mntput(o->od_mnt);
8477         o->od_mnt = NULL;
8478
8479 out:
8480         if (__page)
8481                 __free_page(__page);
8482
8483         return rc;
8484 }
8485
8486 static struct lu_device *osd_device_fini(const struct lu_env *env,
8487                                          struct lu_device *d)
8488 {
8489         struct osd_device *o = osd_dev(d);
8490
8491         ENTRY;
8492
8493         osd_index_backup(env, o, false);
8494         osd_shutdown(env, o);
8495         osd_procfs_fini(o);
8496         if (o->od_oi_table != NULL)
8497                 osd_oi_fini(osd_oti_get(env), o);
8498         if (o->od_extent_bytes_percpu)
8499                 free_percpu(o->od_extent_bytes_percpu);
8500         osd_obj_map_fini(o);
8501         osd_umount(env, o);
8502
8503         RETURN(NULL);
8504 }
8505
8506 static int osd_device_init0(const struct lu_env *env,
8507                             struct osd_device *o,
8508                             struct lustre_cfg *cfg)
8509 {
8510         struct lu_device *l = osd2lu_dev(o);
8511         struct osd_thread_info *info;
8512         int cplen = 0;
8513         char *opts = NULL;
8514         bool restored = false;
8515         int rc;
8516
8517         /* if the module was re-loaded, env can loose its keys */
8518         rc = lu_env_refill((struct lu_env *)env);
8519         if (rc)
8520                 GOTO(out, rc);
8521         info = osd_oti_get(env);
8522         LASSERT(info);
8523
8524         l->ld_ops = &osd_lu_ops;
8525         o->od_dt_dev.dd_ops = &osd_dt_ops;
8526
8527         spin_lock_init(&o->od_osfs_lock);
8528         mutex_init(&o->od_otable_mutex);
8529         INIT_LIST_HEAD(&o->od_orphan_list);
8530         INIT_LIST_HEAD(&o->od_index_backup_list);
8531         INIT_LIST_HEAD(&o->od_index_restore_list);
8532         spin_lock_init(&o->od_lock);
8533         o->od_index_backup_policy = LIBP_NONE;
8534         o->od_t10_type = 0;
8535         init_waitqueue_head(&o->od_commit_cb_done);
8536
8537         o->od_read_cache = 1;
8538         o->od_writethrough_cache = 1;
8539         o->od_enable_projid_xattr = 0;
8540         o->od_readcache_max_filesize = OSD_MAX_CACHE_SIZE;
8541         o->od_readcache_max_iosize = OSD_READCACHE_MAX_IO_MB << 20;
8542         o->od_writethrough_max_iosize = OSD_WRITECACHE_MAX_IO_MB << 20;
8543         o->od_scrub.os_scrub.os_auto_scrub_interval = AS_DEFAULT;
8544         /* default fallocate to unwritten extents: LU-14326/LU-14333 */
8545         o->od_fallocate_zero_blocks = 0;
8546
8547         cplen = strlcpy(o->od_svname, lustre_cfg_string(cfg, 4),
8548                         sizeof(o->od_svname));
8549         if (cplen >= sizeof(o->od_svname)) {
8550                 rc = -E2BIG;
8551                 GOTO(out, rc);
8552         }
8553
8554         o->od_index_backup_stop = 0;
8555         o->od_index = -1; /* -1 means index is invalid */
8556         rc = server_name2index(o->od_svname, &o->od_index, NULL);
8557         if (rc == LDD_F_SV_TYPE_OST)
8558                 o->od_is_ost = 1;
8559
8560         o->od_full_scrub_ratio = OFSR_DEFAULT;
8561         o->od_full_scrub_threshold_rate = FULL_SCRUB_THRESHOLD_RATE_DEFAULT;
8562         rc = osd_mount(env, o, cfg);
8563         if (rc != 0)
8564                 GOTO(out, rc);
8565
8566         /* Can only check block device after mount */
8567         o->od_nonrotational =
8568                 blk_queue_nonrot(bdev_get_queue(osd_sb(o)->s_bdev));
8569
8570         rc = osd_obj_map_init(env, o);
8571         if (rc != 0)
8572                 GOTO(out_mnt, rc);
8573
8574         rc = lu_site_init(&o->od_site, l);
8575         if (rc != 0)
8576                 GOTO(out_compat, rc);
8577         o->od_site.ls_bottom_dev = l;
8578
8579         rc = lu_site_init_finish(&o->od_site);
8580         if (rc != 0)
8581                 GOTO(out_site, rc);
8582
8583         opts = lustre_cfg_string(cfg, 3);
8584         if (opts && strstr(opts, "resetoi"))
8585                 restored = true;
8586
8587         INIT_LIST_HEAD(&o->od_ios_list);
8588
8589         rc = lprocfs_init_brw_stats(&o->od_brw_stats);
8590         if (rc)
8591                 GOTO(out_brw_stats, rc);
8592
8593         /* setup scrub, including OI files initialization */
8594         o->od_in_init = 1;
8595         rc = osd_scrub_setup(env, o, restored);
8596         o->od_in_init = 0;
8597         if (rc < 0)
8598                 GOTO(out_brw_stats, rc);
8599
8600         rc = osd_procfs_init(o, o->od_svname);
8601         if (rc != 0) {
8602                 CERROR("%s: can't initialize procfs: rc = %d\n",
8603                        o->od_svname, rc);
8604                 GOTO(out_scrub, rc);
8605         }
8606
8607         LASSERT(l->ld_site->ls_linkage.next != NULL);
8608         LASSERT(l->ld_site->ls_linkage.prev != NULL);
8609
8610         /* initialize quota slave instance */
8611         /* currently it's no need to prepare qsd_instance_md for OST */
8612         if (!o->od_is_ost) {
8613                 o->od_quota_slave_md = qsd_init(env, o->od_svname,
8614                                                 &o->od_dt_dev, o->od_proc_entry,
8615                                                 true, true);
8616                 if (IS_ERR(o->od_quota_slave_md)) {
8617                         rc = PTR_ERR(o->od_quota_slave_md);
8618                         o->od_quota_slave_md = NULL;
8619                         GOTO(out_procfs, rc);
8620                 }
8621         }
8622
8623         o->od_quota_slave_dt = qsd_init(env, o->od_svname, &o->od_dt_dev,
8624                                         o->od_proc_entry, false, true);
8625
8626         if (IS_ERR(o->od_quota_slave_dt)) {
8627                 if (o->od_quota_slave_md != NULL) {
8628                         qsd_fini(env, o->od_quota_slave_md);
8629                         o->od_quota_slave_md = NULL;
8630                 }
8631
8632                 rc = PTR_ERR(o->od_quota_slave_dt);
8633                 o->od_quota_slave_dt = NULL;
8634                 GOTO(out_procfs, rc);
8635         }
8636
8637         o->od_extent_bytes_percpu = alloc_percpu(unsigned int);
8638         if (!o->od_extent_bytes_percpu) {
8639                 rc = -ENOMEM;
8640                 GOTO(out_procfs, rc);
8641         }
8642
8643         RETURN(0);
8644
8645 out_procfs:
8646         osd_procfs_fini(o);
8647 out_scrub:
8648         osd_scrub_cleanup(env, o);
8649 out_brw_stats:
8650         lprocfs_fini_brw_stats(&o->od_brw_stats);
8651 out_site:
8652         lu_site_fini(&o->od_site);
8653 out_compat:
8654         osd_obj_map_fini(o);
8655 out_mnt:
8656         osd_umount(env, o);
8657 out:
8658         return rc;
8659 }
8660
8661 static struct lu_device *osd_device_alloc(const struct lu_env *env,
8662                                           struct lu_device_type *t,
8663                                           struct lustre_cfg *cfg)
8664 {
8665         struct osd_device *o;
8666         int rc;
8667
8668         OBD_ALLOC_PTR(o);
8669         if (o == NULL)
8670                 return ERR_PTR(-ENOMEM);
8671
8672         rc = dt_device_init(&o->od_dt_dev, t);
8673         if (rc == 0) {
8674                 /*
8675                  * Because the ctx might be revived in dt_device_init,
8676                  * refill the env here
8677                  */
8678                 lu_env_refill((struct lu_env *)env);
8679                 rc = osd_device_init0(env, o, cfg);
8680                 if (rc)
8681                         dt_device_fini(&o->od_dt_dev);
8682         }
8683
8684         if (unlikely(rc != 0))
8685                 OBD_FREE_PTR(o);
8686
8687         return rc == 0 ? osd2lu_dev(o) : ERR_PTR(rc);
8688 }
8689
8690 static struct lu_device *osd_device_free(const struct lu_env *env,
8691                                          struct lu_device *d)
8692 {
8693         struct osd_device *o = osd_dev(d);
8694
8695         ENTRY;
8696
8697         /* XXX: make osd top device in order to release reference */
8698         d->ld_site->ls_top_dev = d;
8699         lu_site_purge(env, d->ld_site, -1);
8700         lu_site_print(env, d->ld_site, &d->ld_site->ls_obj_hash.nelems,
8701                       D_ERROR, lu_cdebug_printer);
8702         lu_site_fini(&o->od_site);
8703         dt_device_fini(&o->od_dt_dev);
8704         OBD_FREE_PTR(o);
8705         RETURN(NULL);
8706 }
8707
8708 static int osd_process_config(const struct lu_env *env,
8709                               struct lu_device *d, struct lustre_cfg *cfg)
8710 {
8711         struct osd_device *o = osd_dev(d);
8712         ssize_t count;
8713         int rc;
8714
8715         ENTRY;
8716
8717         switch (cfg->lcfg_command) {
8718         case LCFG_SETUP:
8719                 rc = osd_mount(env, o, cfg);
8720                 break;
8721         case LCFG_CLEANUP:
8722                 /*
8723                  * For the case LCFG_PRE_CLEANUP is not called in advance,
8724                  * that may happend if hit failure during mount process.
8725                  */
8726                 osd_index_backup(env, o, false);
8727                 lu_dev_del_linkage(d->ld_site, d);
8728                 rc = osd_shutdown(env, o);
8729                 break;
8730         case LCFG_PARAM:
8731                 LASSERT(&o->od_dt_dev);
8732                 count  = class_modify_config(cfg, PARAM_OSD,
8733                                              &o->od_dt_dev.dd_kobj);
8734                 if (count < 0)
8735                         count = class_modify_config(cfg, PARAM_OST,
8736                                                     &o->od_dt_dev.dd_kobj);
8737                 rc = count > 0 ? 0 : count;
8738                 break;
8739         case LCFG_PRE_CLEANUP:
8740                 osd_scrub_stop(o);
8741                 osd_index_backup(env, o,
8742                                  o->od_index_backup_policy != LIBP_NONE);
8743                 rc = 0;
8744                 break;
8745         default:
8746                 rc = -ENOSYS;
8747         }
8748
8749         RETURN(rc);
8750 }
8751
8752 static int osd_recovery_complete(const struct lu_env *env,
8753                                  struct lu_device *d)
8754 {
8755         struct osd_device *osd = osd_dev(d);
8756         int rc = 0;
8757
8758         ENTRY;
8759
8760         if (osd->od_quota_slave_md == NULL && osd->od_quota_slave_dt == NULL)
8761                 RETURN(0);
8762
8763         /*
8764          * start qsd instance on recovery completion, this notifies the quota
8765          * slave code that we are about to process new requests now
8766          */
8767         rc = qsd_start(env, osd->od_quota_slave_dt);
8768         if (rc == 0 && osd->od_quota_slave_md != NULL)
8769                 rc = qsd_start(env, osd->od_quota_slave_md);
8770
8771         RETURN(rc);
8772 }
8773
8774 /*
8775  * we use exports to track all osd users
8776  */
8777 static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
8778                            struct obd_device *obd, struct obd_uuid *cluuid,
8779                            struct obd_connect_data *data, void *localdata)
8780 {
8781         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
8782         struct lustre_handle conn;
8783         int rc;
8784
8785         ENTRY;
8786
8787         CDEBUG(D_CONFIG, "connect #%d\n", osd->od_connects);
8788
8789         rc = class_connect(&conn, obd, cluuid);
8790         if (rc)
8791                 RETURN(rc);
8792
8793         *exp = class_conn2export(&conn);
8794
8795         spin_lock(&osd->od_osfs_lock);
8796         osd->od_connects++;
8797         spin_unlock(&osd->od_osfs_lock);
8798
8799         RETURN(0);
8800 }
8801
8802 /*
8803  * once last export (we don't count self-export) disappeared
8804  * osd can be released
8805  */
8806 static int osd_obd_disconnect(struct obd_export *exp)
8807 {
8808         struct obd_device *obd = exp->exp_obd;
8809         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
8810         int rc, release = 0;
8811
8812         ENTRY;
8813
8814         /* Only disconnect the underlying layers on the final disconnect. */
8815         spin_lock(&osd->od_osfs_lock);
8816         osd->od_connects--;
8817         if (osd->od_connects == 0)
8818                 release = 1;
8819         spin_unlock(&osd->od_osfs_lock);
8820
8821         rc = class_disconnect(exp); /* bz 9811 */
8822
8823         if (rc == 0 && release)
8824                 class_manual_cleanup(obd);
8825         RETURN(rc);
8826 }
8827
8828 static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
8829                        struct lu_device *dev)
8830 {
8831         struct osd_device *osd = osd_dev(dev);
8832         struct lr_server_data *lsd =
8833                         &osd->od_dt_dev.dd_lu_dev.ld_site->ls_tgt->lut_lsd;
8834         int result = 0;
8835
8836         ENTRY;
8837
8838         if (osd->od_quota_slave_md != NULL) {
8839                 /* set up quota slave objects for inode */
8840                 result = qsd_prepare(env, osd->od_quota_slave_md);
8841                 if (result != 0)
8842                         RETURN(result);
8843         }
8844
8845         if (osd->od_quota_slave_dt != NULL) {
8846                 /* set up quota slave objects for block */
8847                 result = qsd_prepare(env, osd->od_quota_slave_dt);
8848                 if (result != 0)
8849                         RETURN(result);
8850         }
8851
8852
8853         if (lsd->lsd_feature_incompat & OBD_COMPAT_OST) {
8854 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 52, 0)
8855                 if (lsd->lsd_feature_rocompat & OBD_ROCOMPAT_IDX_IN_IDIF) {
8856                         osd->od_index_in_idif = 1;
8857                 } else {
8858                         osd->od_index_in_idif = 0;
8859                         result = osd_register_proc_index_in_idif(osd);
8860                         if (result != 0)
8861                                 RETURN(result);
8862                 }
8863 #else
8864                 osd->od_index_in_idif = 1;
8865 #endif
8866         }
8867
8868         result = osd_fid_init(env, osd);
8869
8870         RETURN(result);
8871 }
8872
8873 /**
8874  * Implementation of lu_device_operations::ldo_fid_alloc() for OSD
8875  *
8876  * Allocate FID.
8877  *
8878  * see include/lu_object.h for the details.
8879  */
8880 static int osd_fid_alloc(const struct lu_env *env, struct lu_device *d,
8881                          struct lu_fid *fid, struct lu_object *parent,
8882                          const struct lu_name *name)
8883 {
8884         struct osd_device *osd = osd_dev(d);
8885
8886         return seq_client_alloc_fid(env, osd->od_cl_seq, fid);
8887 }
8888
8889 static const struct lu_object_operations osd_lu_obj_ops = {
8890         .loo_object_init      = osd_object_init,
8891         .loo_object_delete    = osd_object_delete,
8892         .loo_object_release   = osd_object_release,
8893         .loo_object_free      = osd_object_free,
8894         .loo_object_print     = osd_object_print,
8895         .loo_object_invariant = osd_object_invariant
8896 };
8897
8898 const struct lu_device_operations osd_lu_ops = {
8899         .ldo_object_alloc      = osd_object_alloc,
8900         .ldo_process_config    = osd_process_config,
8901         .ldo_recovery_complete = osd_recovery_complete,
8902         .ldo_prepare           = osd_prepare,
8903         .ldo_fid_alloc         = osd_fid_alloc,
8904 };
8905
8906 static const struct lu_device_type_operations osd_device_type_ops = {
8907         .ldto_init = osd_type_init,
8908         .ldto_fini = osd_type_fini,
8909
8910         .ldto_start = osd_type_start,
8911         .ldto_stop  = osd_type_stop,
8912
8913         .ldto_device_alloc = osd_device_alloc,
8914         .ldto_device_free  = osd_device_free,
8915
8916         .ldto_device_init = osd_device_init,
8917         .ldto_device_fini = osd_device_fini
8918 };
8919
8920 static struct lu_device_type osd_device_type = {
8921         .ldt_tags     = LU_DEVICE_DT,
8922         .ldt_name     = LUSTRE_OSD_LDISKFS_NAME,
8923         .ldt_ops      = &osd_device_type_ops,
8924         .ldt_ctx_tags = LCT_LOCAL,
8925 };
8926
8927 static int osd_health_check(const struct lu_env *env, struct obd_device *obd)
8928 {
8929         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
8930         struct super_block *sb = osd_sb(osd);
8931
8932         return (osd->od_mnt == NULL || sb->s_flags & SB_RDONLY);
8933 }
8934
8935 /*
8936  * lprocfs legacy support.
8937  */
8938 static const struct obd_ops osd_obd_device_ops = {
8939         .o_owner = THIS_MODULE,
8940         .o_connect      = osd_obd_connect,
8941         .o_disconnect   = osd_obd_disconnect,
8942         .o_health_check = osd_health_check,
8943 };
8944
8945 static ssize_t delayed_unlink_mb_show(struct kobject *kobj,
8946                                       struct attribute *attr, char *buf)
8947 {
8948         return snprintf(buf, PAGE_SIZE, "%d\n",
8949                         ldiskfs_delayed_unlink_blocks >> 11);
8950 }
8951
8952 static ssize_t delayed_unlink_mb_store(struct kobject *kobj,
8953                                        struct attribute *attr,
8954                                        const char *buffer, size_t count)
8955 {
8956         u64 delayed_unlink_bytes;
8957         int rc;
8958
8959         rc = sysfs_memparse(buffer, count, &delayed_unlink_bytes, "MiB");
8960         if (rc)
8961                 return rc;
8962
8963         ldiskfs_delayed_unlink_blocks = delayed_unlink_bytes >> 9;
8964
8965         return count;
8966 }
8967 LUSTRE_RW_ATTR(delayed_unlink_mb);
8968
8969
8970 static ssize_t track_declares_assert_show(struct kobject *kobj,
8971                                    struct attribute *attr,
8972                                    char *buf)
8973 {
8974         return sprintf(buf, "%d\n", ldiskfs_track_declares_assert);
8975 }
8976
8977 static ssize_t track_declares_assert_store(struct kobject *kobj,
8978                                            struct attribute *attr,
8979                                            const char *buffer, size_t count)
8980 {
8981         bool track_declares_assert;
8982         int rc;
8983
8984         rc = kstrtobool(buffer, &track_declares_assert);
8985         if (rc)
8986                 return rc;
8987
8988         ldiskfs_track_declares_assert = track_declares_assert;
8989
8990         return count;
8991 }
8992 LUSTRE_RW_ATTR(track_declares_assert);
8993
8994 static int __init osd_init(void)
8995 {
8996         struct kobject *kobj;
8997         int rc;
8998
8999         BUILD_BUG_ON(BH_DXLock >=
9000                      sizeof(((struct buffer_head *)0)->b_state) * 8);
9001 #if !defined(CONFIG_DEBUG_MUTEXES) && !defined(CONFIG_DEBUG_SPINLOCK)
9002         /* please, try to keep osd_thread_info smaller than a page */
9003         BUILD_BUG_ON(sizeof(struct osd_thread_info) > PAGE_SIZE);
9004 #endif
9005
9006         rc = libcfs_setup();
9007         if (rc)
9008                 return rc;
9009
9010         osd_oi_mod_init();
9011
9012         rc = lu_kmem_init(ldiskfs_caches);
9013         if (rc)
9014                 return rc;
9015
9016         rc = class_register_type(&osd_obd_device_ops, NULL, true,
9017                                  LUSTRE_OSD_LDISKFS_NAME, &osd_device_type);
9018         if (rc) {
9019                 lu_kmem_fini(ldiskfs_caches);
9020                 return rc;
9021         }
9022
9023         kobj = kset_find_obj(lustre_kset, LUSTRE_OSD_LDISKFS_NAME);
9024         if (kobj) {
9025                 rc = sysfs_create_file(kobj,
9026                                        &lustre_attr_track_declares_assert.attr);
9027                 if (rc) {
9028                         CWARN("%s: track_declares_assert sysfs registration failed: rc = %d\n",
9029                               "osd-ldiskfs", rc);
9030                         rc = 0;
9031                 }
9032
9033                 rc = sysfs_create_file(kobj,
9034                                        &lustre_attr_delayed_unlink_mb.attr);
9035                 if (rc) {
9036                         CWARN("%s: delayed_unlink_mb registration failed: rc = %d\n",
9037                               "osd-ldiskfs", rc);
9038                         rc = 0;
9039                 }
9040
9041                 kobject_put(kobj);
9042         }
9043
9044 #ifndef HAVE_FLUSH_DELAYED_FPUT
9045         if (unlikely(cfs_flush_delayed_fput == NULL))
9046                 cfs_flush_delayed_fput =
9047                         cfs_kallsyms_lookup_name("flush_delayed_fput");
9048 #endif
9049
9050         return rc;
9051 }
9052
9053 static void __exit osd_exit(void)
9054 {
9055         struct kobject *kobj;
9056
9057         kobj = kset_find_obj(lustre_kset, LUSTRE_OSD_LDISKFS_NAME);
9058         if (kobj) {
9059                 sysfs_remove_file(kobj,
9060                                   &lustre_attr_track_declares_assert.attr);
9061                 kobject_put(kobj);
9062         }
9063         class_unregister_type(LUSTRE_OSD_LDISKFS_NAME);
9064         lu_kmem_fini(ldiskfs_caches);
9065 }
9066
9067 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
9068 MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_LDISKFS_NAME")");
9069 MODULE_VERSION(LUSTRE_VERSION_STRING);
9070 MODULE_LICENSE("GPL");
9071
9072 module_init(osd_init);
9073 module_exit(osd_exit);