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  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/osd/osd_handler.c
  33  *
  34  * Top-level entry points into osd module
  35  *
  36  * Author: Nikita Danilov <nikita@clusterfs.com>
  37  *         Pravin Shelar <pravin.shelar@sun.com> : Added fid in dirent
  38  */
  39
  40 #define DEBUG_SUBSYSTEM S_OSD
  41
  42 #include <linux/fs_struct.h>
  43 #include <linux/kallsyms.h>
  44 #include <linux/module.h>
  45 #include <linux/user_namespace.h>
  46 #include <linux/uidgid.h>
  47
  48 /* prerequisite for linux/xattr.h */
  49 #include <linux/types.h>
  50 /* prerequisite for linux/xattr.h */
  51 #include <linux/fs.h>
  52 /* XATTR_{REPLACE,CREATE} */
  53 #include <linux/xattr.h>
  54
  55 #include <ldiskfs/ldiskfs.h>
  56 #include <ldiskfs/xattr.h>
  57 #include <ldiskfs/ldiskfs_extents.h>
  58 #undef ENTRY
  59 /*
  60  * struct OBD_{ALLOC,FREE}*()
  61  * OBD_FAIL_CHECK
  62  */
  63 #include <obd_support.h>
  64 /* struct ptlrpc_thread */
  65 #include <lustre_net.h>
  66 #include <lustre_fid.h>
  67 /* process_config */
  68 #include <uapi/linux/lustre/lustre_param.h>
  69
  70 #include "osd_internal.h"
  71 #include "osd_dynlocks.h"
  72
  73 /* llo_* api support */
  74 #include <md_object.h>
  75 #include <lustre_quota.h>
  76
  77 #include <lustre_linkea.h>
  78
  79 /* Maximum EA size is limited by LNET_MTU for remote objects */
  80 #define OSD_MAX_EA_SIZE 1048364
  81
  82 int ldiskfs_pdo = 1;
  83 module_param(ldiskfs_pdo, int, 0644);
  84 MODULE_PARM_DESC(ldiskfs_pdo, "ldiskfs with parallel directory operations");
  85
  86 int ldiskfs_track_declares_assert;
  87 module_param(ldiskfs_track_declares_assert, int, 0644);
  88 MODULE_PARM_DESC(ldiskfs_track_declares_assert, "LBUG during tracking of declares");
  89
  90 /* Slab to allocate dynlocks */
  91 struct kmem_cache *dynlock_cachep;
  92
  93 /* Slab to allocate osd_it_ea */
  94 struct kmem_cache *osd_itea_cachep;
  95
  96 static struct lu_kmem_descr ldiskfs_caches[] = {
  97         {
  98                 .ckd_cache = &dynlock_cachep,
  99                 .ckd_name  = "dynlock_cache",
 100                 .ckd_size  = sizeof(struct dynlock_handle)
 101         },
 102         {
 103                 .ckd_cache = &osd_itea_cachep,
 104                 .ckd_name  = "osd_itea_cache",
 105                 .ckd_size  = sizeof(struct osd_it_ea)
 106         },
 107         {
 108                 .ckd_cache = NULL
 109         }
 110 };
 111
 112 static const char dot[] = ".";
 113 static const char dotdot[] = "..";
 114
 115 static const struct lu_object_operations      osd_lu_obj_ops;
 116 static const struct dt_object_operations      osd_obj_ops;
 117 static const struct dt_object_operations      osd_obj_otable_it_ops;
 118 static const struct dt_index_operations       osd_index_iam_ops;
 119 static const struct dt_index_operations       osd_index_ea_ops;
 120
 121 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
 122                           const struct lu_fid *fid);
 123 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
 124                                                 struct osd_device *osd);
 125
 126 int osd_trans_declare_op2rb[] = {
 127         [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
 128         [OSD_OT_PUNCH]          = OSD_OT_MAX,
 129         [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
 130         [OSD_OT_CREATE]         = OSD_OT_DESTROY,
 131         [OSD_OT_DESTROY]        = OSD_OT_CREATE,
 132         [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
 133         [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
 134         [OSD_OT_WRITE]          = OSD_OT_WRITE,
 135         [OSD_OT_INSERT]         = OSD_OT_DELETE,
 136         [OSD_OT_DELETE]         = OSD_OT_INSERT,
 137         [OSD_OT_QUOTA]          = OSD_OT_MAX,
 138 };
 139
 140 static int osd_has_index(const struct osd_object *obj)
 141 {
 142         return obj->oo_dt.do_index_ops != NULL;
 143 }
 144
 145 static int osd_object_invariant(const struct lu_object *l)
 146 {
 147         return osd_invariant(osd_obj(l));
 148 }
 149
 150 /*
 151  * Concurrency: doesn't matter
 152  */
 153 static int osd_is_write_locked(const struct lu_env *env, struct osd_object *o)
 154 {
 155         struct osd_thread_info *oti = osd_oti_get(env);
 156
 157         return oti->oti_w_locks > 0 && o->oo_owner == env;
 158 }
 159
 160 /*
 161  * Concurrency: doesn't access mutable data
 162  */
 163 static int osd_root_get(const struct lu_env *env,
 164                         struct dt_device *dev, struct lu_fid *f)
 165 {
 166         lu_local_obj_fid(f, OSD_FS_ROOT_OID);
 167         return 0;
 168 }
 169
 170 /*
 171  * the following set of functions are used to maintain per-thread
 172  * cache of FID->ino mapping. this mechanism is needed to resolve
 173  * FID to inode at dt_insert() which in turn stores ino in the
 174  * directory entries to keep ldiskfs compatible with ext[34].
 175  * due to locking-originated restrictions we can't lookup ino
 176  * using LU cache (deadlock is possible). lookup using OI is quite
 177  * expensive. so instead we maintain this cache and methods like
 178  * dt_create() fill it. so in the majority of cases dt_insert() is
 179  * able to find needed mapping in lockless manner.
 180  */
 181 static struct osd_idmap_cache *
 182 osd_idc_find(const struct lu_env *env, struct osd_device *osd,
 183              const struct lu_fid *fid)
 184 {
 185         struct osd_thread_info *oti = osd_oti_get(env);
 186         struct osd_idmap_cache *idc = oti->oti_ins_cache;
 187         int i;
 188
 189         for (i = 0; i < oti->oti_ins_cache_used; i++) {
 190                 if (!lu_fid_eq(&idc[i].oic_fid, fid))
 191                         continue;
 192                 if (idc[i].oic_dev != osd)
 193                         continue;
 194
 195                 return idc + i;
 196         }
 197
 198         return NULL;
 199 }
 200
 201 static struct osd_idmap_cache *
 202 osd_idc_add(const struct lu_env *env, struct osd_device *osd,
 203             const struct lu_fid *fid)
 204 {
 205         struct osd_thread_info *oti   = osd_oti_get(env);
 206         struct osd_idmap_cache *idc;
 207         int i;
 208
 209         if (unlikely(oti->oti_ins_cache_used >= oti->oti_ins_cache_size)) {
 210                 i = oti->oti_ins_cache_size * 2;
 211                 if (i == 0)
 212                         i = OSD_INS_CACHE_SIZE;
 213                 OBD_ALLOC_PTR_ARRAY(idc, i);
 214                 if (idc == NULL)
 215                         return ERR_PTR(-ENOMEM);
 216                 if (oti->oti_ins_cache != NULL) {
 217                         memcpy(idc, oti->oti_ins_cache,
 218                                oti->oti_ins_cache_used * sizeof(*idc));
 219                         OBD_FREE_PTR_ARRAY(oti->oti_ins_cache,
 220                                            oti->oti_ins_cache_used);
 221                 }
 222                 oti->oti_ins_cache = idc;
 223                 oti->oti_ins_cache_size = i;
 224         }
 225
 226         idc = oti->oti_ins_cache + oti->oti_ins_cache_used++;
 227         idc->oic_fid = *fid;
 228         idc->oic_dev = osd;
 229         idc->oic_lid.oii_ino = 0;
 230         idc->oic_lid.oii_gen = 0;
 231         idc->oic_remote = 0;
 232
 233         return idc;
 234 }
 235
 236 /*
 237  * lookup mapping for the given fid in the cache, initialize a
 238  * new one if not found. the initialization checks whether the
 239  * object is local or remote. for local objects, OI is used to
 240  * learn ino/generation. the function is used when the caller
 241  * has no information about the object, e.g. at dt_insert().
 242  */
 243 static struct osd_idmap_cache *
 244 osd_idc_find_or_init(const struct lu_env *env, struct osd_device *osd,
 245                      const struct lu_fid *fid)
 246 {
 247         struct osd_idmap_cache *idc;
 248         int rc;
 249
 250         idc = osd_idc_find(env, osd, fid);
 251         LASSERT(!IS_ERR(idc));
 252         if (idc != NULL)
 253                 return idc;
 254
 255         CDEBUG(D_INODE, "%s: FID "DFID" not in the id map cache\n",
 256                osd->od_svname, PFID(fid));
 257
 258         /* new mapping is needed */
 259         idc = osd_idc_add(env, osd, fid);
 260         if (IS_ERR(idc)) {
 261                 CERROR("%s: FID "DFID" add id map cache failed: %ld\n",
 262                        osd->od_svname, PFID(fid), PTR_ERR(idc));
 263                 return idc;
 264         }
 265
 266         /* initialize it */
 267         rc = osd_remote_fid(env, osd, fid);
 268         if (unlikely(rc < 0))
 269                 return ERR_PTR(rc);
 270
 271         if (rc == 0) {
 272                 /* the object is local, lookup in OI */
 273                 /* XXX: probably cheaper to lookup in LU first? */
 274                 rc = osd_oi_lookup(osd_oti_get(env), osd, fid,
 275                                    &idc->oic_lid, 0);
 276                 if (unlikely(rc < 0)) {
 277                         CERROR("can't lookup: rc = %d\n", rc);
 278                         return ERR_PTR(rc);
 279                 }
 280         } else {
 281                 /* the object is remote */
 282                 idc->oic_remote = 1;
 283         }
 284
 285         return idc;
 286 }
 287
 288 static void osd_idc_dump_lma(const struct lu_env *env,
 289                                 struct osd_device *osd,
 290                                 unsigned long ino,
 291                                 bool check_in_oi)
 292 {
 293         struct osd_thread_info *info = osd_oti_get(env);
 294         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 295         const struct lu_fid *fid;
 296         struct osd_inode_id lid;
 297         struct inode *inode;
 298         int rc;
 299
 300         inode = osd_ldiskfs_iget(osd_sb(osd), ino);
 301         if (IS_ERR(inode)) {
 302                 CERROR("%s: can't get inode %lu: rc = %d\n",
 303                        osd->od_svname, ino, (int)PTR_ERR(inode));
 304                 return;
 305         }
 306         if (is_bad_inode(inode)) {
 307                 CERROR("%s: bad inode %lu\n", osd->od_svname, ino);
 308                 goto put;
 309         }
 310         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
 311         if (rc) {
 312                 CERROR("%s: can't get LMA for %lu: rc = %d\n",
 313                        osd->od_svname, ino, rc);
 314                 goto put;
 315         }
 316         fid = &loa->loa_lma.lma_self_fid;
 317         LCONSOLE(D_INFO, "%s: "DFID" in inode %lu/%u\n", osd->od_svname,
 318                       PFID(fid), ino, (unsigned)inode->i_generation);
 319         if (!check_in_oi)
 320                 goto put;
 321         rc = osd_oi_lookup(osd_oti_get(env), osd, fid, &lid, 0);
 322         if (rc) {
 323                 CERROR("%s: can't lookup "DFID": rc = %d\n",
 324                        osd->od_svname, PFID(fid), rc);
 325                 goto put;
 326         }
 327         LCONSOLE(D_INFO, "%s: "DFID" maps to %u/%u\n", osd->od_svname,
 328                       PFID(fid), lid.oii_ino, lid.oii_gen);
 329 put:
 330         iput(inode);
 331 }
 332
 333 static void osd_idc_dump_debug(const struct lu_env *env,
 334                                 struct osd_device *osd,
 335                                 const struct lu_fid *fid,
 336                                 unsigned long ino1,
 337                                 unsigned long ino2)
 338 {
 339         struct osd_inode_id lid;
 340
 341         int rc;
 342
 343         rc = osd_oi_lookup(osd_oti_get(env), osd, fid, &lid, 0);
 344         if (!rc) {
 345                 LCONSOLE(D_INFO, "%s: "DFID" maps to %u/%u\n",
 346                         osd->od_svname, PFID(fid), lid.oii_ino, lid.oii_gen);
 347                 osd_idc_dump_lma(env, osd, lid.oii_ino, false);
 348         } else {
 349                 CERROR("%s: can't lookup "DFID": rc = %d\n",
 350                        osd->od_svname, PFID(fid), rc);
 351         }
 352         if (ino1)
 353                 osd_idc_dump_lma(env, osd, ino1, true);
 354         if (ino2)
 355                 osd_idc_dump_lma(env, osd, ino2, true);
 356 }
 357
 358 /*
 359  * lookup mapping for given FID and fill it from the given object.
 360  * the object is lolcal by definition.
 361  */
 362 static int osd_idc_find_and_init(const struct lu_env *env,
 363                                  struct osd_device *osd,
 364                                  struct osd_object *obj)
 365 {
 366         const struct lu_fid *fid = lu_object_fid(&obj->oo_dt.do_lu);
 367         struct osd_idmap_cache *idc;
 368
 369         idc = osd_idc_find(env, osd, fid);
 370         LASSERT(!IS_ERR(idc));
 371         if (idc != NULL) {
 372                 if (obj->oo_inode == NULL)
 373                         return 0;
 374                 if (idc->oic_lid.oii_ino != obj->oo_inode->i_ino) {
 375                         if (idc->oic_lid.oii_ino) {
 376                                 osd_idc_dump_debug(env, osd, fid,
 377                                                    idc->oic_lid.oii_ino,
 378                                                    obj->oo_inode->i_ino);
 379                                 return -EINVAL;
 380                         }
 381                         idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
 382                         idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
 383                 }
 384                 return 0;
 385         }
 386
 387         CDEBUG(D_INODE, "%s: FID "DFID" not in the id map cache\n",
 388                osd->od_svname, PFID(fid));
 389
 390         /* new mapping is needed */
 391         idc = osd_idc_add(env, osd, fid);
 392         if (IS_ERR(idc)) {
 393                 CERROR("%s: FID "DFID" add id map cache failed: %ld\n",
 394                        osd->od_svname, PFID(fid), PTR_ERR(idc));
 395                 return PTR_ERR(idc);
 396         }
 397
 398         if (obj->oo_inode != NULL) {
 399                 idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
 400                 idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
 401         }
 402         return 0;
 403 }
 404
 405 /*
 406  * OSD object methods.
 407  */
 408
 409 /*
 410  * Concurrency: no concurrent access is possible that early in object
 411  * life-cycle.
 412  */
 413 static struct lu_object *osd_object_alloc(const struct lu_env *env,
 414                                           const struct lu_object_header *hdr,
 415                                           struct lu_device *d)
 416 {
 417         struct osd_object *mo;
 418
 419         OBD_ALLOC_PTR(mo);
 420         if (mo != NULL) {
 421                 struct lu_object *l;
 422                 struct lu_object_header *h;
 423                 struct osd_device *o = osd_dev(d);
 424
 425                 l = &mo->oo_dt.do_lu;
 426                 if (unlikely(o->od_in_init)) {
 427                         OBD_ALLOC_PTR(h);
 428                         if (!h) {
 429                                 OBD_FREE_PTR(mo);
 430                                 return NULL;
 431                         }
 432
 433                         lu_object_header_init(h);
 434                         lu_object_init(l, h, d);
 435                         lu_object_add_top(h, l);
 436                         mo->oo_header = h;
 437                 } else {
 438                         dt_object_init(&mo->oo_dt, NULL, d);
 439                         mo->oo_header = NULL;
 440                 }
 441
 442                 mo->oo_dt.do_ops = &osd_obj_ops;
 443                 l->lo_ops = &osd_lu_obj_ops;
 444                 init_rwsem(&mo->oo_sem);
 445                 init_rwsem(&mo->oo_ext_idx_sem);
 446                 spin_lock_init(&mo->oo_guard);
 447                 INIT_LIST_HEAD(&mo->oo_xattr_list);
 448                 return l;
 449         }
 450         return NULL;
 451 }
 452
 453 int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
 454                 struct dentry *dentry, struct lustre_ost_attrs *loa)
 455 {
 456         int rc;
 457
 458         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 459                              (void *)loa, sizeof(*loa));
 460         if (rc > 0) {
 461                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
 462
 463                 if (rc < sizeof(*lma))
 464                         return -EINVAL;
 465
 466                 rc = 0;
 467                 lustre_loa_swab(loa, true);
 468                 /* Check LMA compatibility */
 469                 if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
 470                         rc = -EOPNOTSUPP;
 471                         CWARN("%s: unsupported incompat LMA feature(s) %#x for fid = "DFID", ino = %lu: rc = %d\n",
 472                               osd_ino2name(inode),
 473                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 474                               PFID(&lma->lma_self_fid), inode->i_ino, rc);
 475                 }
 476         } else if (rc == 0) {
 477                 rc = -ENODATA;
 478         }
 479
 480         return rc;
 481 }
 482
 483 /*
 484  * retrieve object from backend ext fs.
 485  **/
 486 struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
 487                        struct osd_inode_id *id)
 488 {
 489         int rc;
 490         struct inode *inode = NULL;
 491
 492         /*
 493          * if we look for an inode withing a running
 494          * transaction, then we risk to deadlock
 495          * osd_dirent_check_repair() breaks this
 496          */
 497          /* LASSERT(current->journal_info == NULL); */
 498
 499         inode = osd_ldiskfs_iget(osd_sb(dev), id->oii_ino);
 500         if (IS_ERR(inode)) {
 501                 CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
 502                        id->oii_ino, PTR_ERR(inode));
 503         } else if (id->oii_gen != OSD_OII_NOGEN &&
 504                    inode->i_generation != id->oii_gen) {
 505                 CDEBUG(D_INODE, "unmatched inode: ino = %u, oii_gen = %u, "
 506                        "i_generation = %u\n",
 507                        id->oii_ino, id->oii_gen, inode->i_generation);
 508                 iput(inode);
 509                 inode = ERR_PTR(-ESTALE);
 510         } else if (inode->i_nlink == 0) {
 511                 /*
 512                  * due to parallel readdir and unlink,
 513                  * we can have dead inode here.
 514                  */
 515                 CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
 516                 iput(inode);
 517                 inode = ERR_PTR(-ESTALE);
 518         } else if (is_bad_inode(inode)) {
 519                 rc = -ENOENT;
 520                 CWARN("%s: bad inode: ino = %u: rc = %d\n",
 521                       osd_dev2name(dev), id->oii_ino, rc);
 522                 iput(inode);
 523                 inode = ERR_PTR(rc);
 524         } else if ((rc = osd_attach_jinode(inode))) {
 525                 iput(inode);
 526                 inode = ERR_PTR(rc);
 527         } else {
 528                 ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
 529                 if (id->oii_gen == OSD_OII_NOGEN)
 530                         osd_id_gen(id, inode->i_ino, inode->i_generation);
 531
 532                 /*
 533                  * Do not update file c/mtime in ldiskfs.
 534                  * NB: we don't have any lock to protect this because we don't
 535                  * have reference on osd_object now, but contention with
 536                  * another lookup + attr_set can't happen in the tiny window
 537                  * between if (...) and set S_NOCMTIME.
 538                  */
 539                 if (!(inode->i_flags & S_NOCMTIME))
 540                         inode->i_flags |= S_NOCMTIME;
 541         }
 542         return inode;
 543 }
 544
 545 int osd_ldiskfs_add_entry(struct osd_thread_info *info, struct osd_device *osd,
 546                           handle_t *handle, struct dentry *child,
 547                           struct inode *inode, struct htree_lock *hlock)
 548 {
 549         int rc, rc2;
 550
 551         rc = __ldiskfs_add_entry(handle, child, inode, hlock);
 552         if (rc == -ENOBUFS || rc == -ENOSPC) {
 553                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 554                 struct inode *parent = child->d_parent->d_inode;
 555                 struct lu_fid *fid = NULL;
 556                 char fidstr[FID_LEN + 1] = "unknown";
 557
 558                 rc2 = osd_get_lma(info, parent, child->d_parent, loa);
 559                 if (!rc2) {
 560                         fid = &loa->loa_lma.lma_self_fid;
 561                 } else if (rc2 == -ENODATA) {
 562                         if (unlikely(parent == inode->i_sb->s_root->d_inode)) {
 563                                 fid = &info->oti_fid3;
 564                                 lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
 565                         } else if (!osd->od_is_ost && osd->od_index == 0) {
 566                                 fid = &info->oti_fid3;
 567                                 lu_igif_build(fid, parent->i_ino,
 568                                               parent->i_generation);
 569                         }
 570                 }
 571
 572                 if (fid != NULL)
 573                         snprintf(fidstr, sizeof(fidstr), DFID, PFID(fid));
 574
 575                 /* below message is checked in sanity.sh test_129 */
 576                 if (rc == -ENOSPC) {
 577                         CWARN("%s: directory (inode: %lu, FID: %s) has reached max size limit\n",
 578                               osd_name(osd), parent->i_ino, fidstr);
 579                 } else {
 580                         rc = 0; /* ignore such error now */
 581                         CWARN("%s: directory (inode: %lu, FID: %s) is approaching max size limit\n",
 582                               osd_name(osd), parent->i_ino, fidstr);
 583                 }
 584
 585         }
 586
 587         return rc;
 588 }
 589
 590
 591 struct inode *
 592 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
 593              struct osd_inode_id *id, struct lu_fid *fid)
 594 {
 595         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 596         struct inode *inode;
 597         int rc;
 598
 599         inode = osd_iget(info, dev, id);
 600         if (IS_ERR(inode))
 601                 return inode;
 602
 603         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
 604         if (!rc) {
 605                 *fid = loa->loa_lma.lma_self_fid;
 606         } else if (rc == -ENODATA) {
 607                 if (unlikely(inode == osd_sb(dev)->s_root->d_inode))
 608                         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
 609                 else
 610                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 611         } else {
 612                 iput(inode);
 613                 inode = ERR_PTR(rc);
 614         }
 615         return inode;
 616 }
 617
 618 static struct inode *osd_iget_check(struct osd_thread_info *info,
 619                                     struct osd_device *dev,
 620                                     const struct lu_fid *fid,
 621                                     struct osd_inode_id *id,
 622                                     bool trusted)
 623 {
 624         struct inode *inode;
 625         int rc = 0;
 626
 627         ENTRY;
 628
 629         /*
 630          * The cached OI mapping is trustable. If we cannot locate the inode
 631          * via the cached OI mapping, then return the failure to the caller
 632          * directly without further OI checking.
 633          */
 634
 635 again:
 636         inode = osd_ldiskfs_iget(osd_sb(dev), id->oii_ino);
 637         if (IS_ERR(inode)) {
 638                 rc = PTR_ERR(inode);
 639                 if (!trusted && (rc == -ENOENT || rc == -ESTALE))
 640                         goto check_oi;
 641
 642                 CDEBUG(D_INODE, "no inode for FID: "DFID", ino = %u, rc = %d\n",
 643                        PFID(fid), id->oii_ino, rc);
 644                 GOTO(put, rc);
 645         }
 646
 647         if (is_bad_inode(inode)) {
 648                 rc = -ENOENT;
 649                 if (!trusted)
 650                         goto check_oi;
 651
 652                 CDEBUG(D_INODE, "bad inode for FID: "DFID", ino = %u\n",
 653                        PFID(fid), id->oii_ino);
 654                 GOTO(put, rc);
 655         }
 656
 657         if (id->oii_gen != OSD_OII_NOGEN &&
 658             inode->i_generation != id->oii_gen) {
 659                 rc = -ESTALE;
 660                 if (!trusted)
 661                         goto check_oi;
 662
 663                 CDEBUG(D_INODE, "unmatched inode for FID: "DFID", ino = %u, "
 664                        "oii_gen = %u, i_generation = %u\n", PFID(fid),
 665                        id->oii_ino, id->oii_gen, inode->i_generation);
 666                 GOTO(put, rc);
 667         }
 668
 669         if (inode->i_nlink == 0) {
 670                 rc = -ENOENT;
 671                 if (!trusted)
 672                         goto check_oi;
 673
 674                 CDEBUG(D_INODE, "stale inode for FID: "DFID", ino = %u\n",
 675                        PFID(fid), id->oii_ino);
 676                 GOTO(put, rc);
 677         }
 678
 679         ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
 680
 681 check_oi:
 682         if (rc != 0) {
 683                 __u32 saved_ino = id->oii_ino;
 684                 __u32 saved_gen = id->oii_gen;
 685
 686                 LASSERT(!trusted);
 687                 LASSERTF(rc == -ESTALE || rc == -ENOENT, "rc = %d\n", rc);
 688
 689                 rc = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
 690                 /*
 691                  * XXX: There are four possible cases:
 692                  *      1. rc = 0.
 693                  *         Backup/restore caused the OI invalid.
 694                  *      2. rc = 0.
 695                  *         Someone unlinked the object but NOT removed
 696                  *         the OI mapping, such as mount target device
 697                  *         as ldiskfs, and modify something directly.
 698                  *      3. rc = -ENOENT.
 699                  *         Someone just removed the object between the
 700                  *         former oi_lookup and the iget. It is normal.
 701                  *      4. Other failure cases.
 702                  *
 703                  *      Generally, when the device is mounted, it will
 704                  *      auto check whether the system is restored from
 705                  *      file-level backup or not. We trust such detect
 706                  *      to distinguish the 1st case from the 2nd case:
 707                  *      if the OI files are consistent but may contain
 708                  *      stale OI mappings because of case 2, if iget()
 709                  *      returns -ENOENT or -ESTALE, then it should be
 710                  *      the case 2.
 711                  */
 712                 if (rc != 0)
 713                         /*
 714                          * If the OI mapping was in OI file before the
 715                          * osd_iget_check(), but now, it is disappear,
 716                          * then it must be removed by race. That is a
 717                          * normal race case.
 718                          */
 719                         GOTO(put, rc);
 720
 721                 /*
 722                  * It is the OI scrub updated the OI mapping by race.
 723                  * The new OI mapping must be valid.
 724                  */
 725                 if (saved_ino != id->oii_ino ||
 726                     (saved_gen != id->oii_gen && saved_gen != OSD_OII_NOGEN)) {
 727                         if (!IS_ERR(inode))
 728                                 iput(inode);
 729
 730                         trusted = true;
 731                         goto again;
 732                 }
 733
 734                 if (IS_ERR(inode)) {
 735                         if (dev->od_scrub.os_scrub.os_file.sf_flags &
 736                             SF_INCONSISTENT)
 737                                 /*
 738                                  * It still can be the case 2, but we cannot
 739                                  * distinguish it from the case 1. So return
 740                                  * -EREMCHG to block current operation until
 741                                  *  OI scrub rebuilt the OI mappings.
 742                                  */
 743                                 rc = -EREMCHG;
 744                         else
 745                                 rc = -ENOENT;
 746
 747                         GOTO(put, rc);
 748                 }
 749
 750                 if (inode->i_generation == id->oii_gen)
 751                         rc = -ENOENT;
 752                 else
 753                         rc = -EREMCHG;
 754         } else {
 755                 if (id->oii_gen == OSD_OII_NOGEN)
 756                         osd_id_gen(id, inode->i_ino, inode->i_generation);
 757
 758                 /*
 759                  * Do not update file c/mtime in ldiskfs.
 760                  * NB: we don't have any lock to protect this because we don't
 761                  * have reference on osd_object now, but contention with
 762                  * another lookup + attr_set can't happen in the tiny window
 763                  * between if (...) and set S_NOCMTIME.
 764                  */
 765                 if (!(inode->i_flags & S_NOCMTIME))
 766                         inode->i_flags |= S_NOCMTIME;
 767         }
 768
 769         GOTO(put, rc);
 770
 771 put:
 772         if (rc != 0) {
 773                 if (!IS_ERR(inode))
 774                         iput(inode);
 775
 776                 inode = ERR_PTR(rc);
 777         }
 778
 779         return inode;
 780 }
 781
 782 /**
 783  * \retval +v: new filter_fid does not contain self-fid
 784  * \retval 0:  filter_fid_18_23, contains self-fid
 785  * \retval -v: other failure cases
 786  */
 787 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
 788                  struct dentry *dentry, struct lu_fid *fid)
 789 {
 790         struct filter_fid *ff = &info->oti_ff;
 791         struct ost_id *ostid = &info->oti_ostid;
 792         int rc;
 793
 794         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
 795         if (rc == sizeof(struct filter_fid_18_23)) {
 796                 struct filter_fid_18_23 *ff_old = (void *)ff;
 797
 798                 ostid_set_seq(ostid, le64_to_cpu(ff_old->ff_seq));
 799                 rc = ostid_set_id(ostid, le64_to_cpu(ff_old->ff_objid));
 800                 /*
 801                  * XXX: use 0 as the index for compatibility, the caller will
 802                  * handle index related issues when necessary.
 803                  */
 804                 if (!rc)
 805                         ostid_to_fid(fid, ostid, 0);
 806         } else if (rc >= (int)sizeof(struct filter_fid_24_29)) {
 807                 rc = 1;
 808         } else if (rc >= 0) {
 809                 rc = -EINVAL;
 810         }
 811
 812         return rc;
 813 }
 814
 815 static int osd_lma_self_repair(struct osd_thread_info *info,
 816                                struct osd_device *osd, struct inode *inode,
 817                                const struct lu_fid *fid, __u32 compat)
 818 {
 819         handle_t *jh;
 820         int rc;
 821
 822         LASSERT(current->journal_info == NULL);
 823
 824         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
 825                                   osd_dto_credits_noquota[DTO_XATTR_SET]);
 826         if (IS_ERR(jh)) {
 827                 rc = PTR_ERR(jh);
 828                 CWARN("%s: cannot start journal for lma_self_repair: rc = %d\n",
 829                       osd_name(osd), rc);
 830                 return rc;
 831         }
 832
 833         rc = osd_ea_fid_set(info, inode, fid, compat, 0);
 834         if (rc != 0)
 835                 CWARN("%s: cannot self repair the LMA: rc = %d\n",
 836                       osd_name(osd), rc);
 837         ldiskfs_journal_stop(jh);
 838         return rc;
 839 }
 840
 841 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
 842 {
 843         struct osd_thread_info *info = osd_oti_get(env);
 844         struct osd_device *osd = osd_obj2dev(obj);
 845         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 846         struct lustre_mdt_attrs *lma = &loa->loa_lma;
 847         struct inode *inode = obj->oo_inode;
 848         struct dentry *dentry = &info->oti_obj_dentry;
 849         struct lu_fid *fid = NULL;
 850         const struct lu_fid *rfid = lu_object_fid(&obj->oo_dt.do_lu);
 851         int rc;
 852
 853         ENTRY;
 854
 855         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 856                              (void *)loa, sizeof(*loa));
 857         if (rc == -ENODATA && !fid_is_igif(rfid) && osd->od_check_ff) {
 858                 fid = &lma->lma_self_fid;
 859                 rc = osd_get_idif(info, inode, dentry, fid);
 860                 if (rc > 0 || (rc == -ENODATA && osd->od_index_in_idif)) {
 861                         /*
 862                          * For the given OST-object, if it has neither LMA nor
 863                          * FID in XATTR_NAME_FID, then the given FID (which is
 864                          * contained in the @obj, from client RPC for locating
 865                          * the OST-object) is trusted. We use it to generate
 866                          * the LMA.
 867                          */
 868                         osd_lma_self_repair(info, osd, inode, rfid,
 869                                             LMAC_FID_ON_OST);
 870                         RETURN(0);
 871                 }
 872         }
 873
 874         if (rc < 0)
 875                 RETURN(rc);
 876
 877         if (rc > 0) {
 878                 rc = 0;
 879                 lustre_lma_swab(lma);
 880                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
 881                              (CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT) &&
 882                               S_ISREG(inode->i_mode)))) {
 883                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
 884                               "fid = "DFID", ino = %lu\n", osd_name(osd),
 885                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 886                               PFID(rfid), inode->i_ino);
 887                         rc = -EOPNOTSUPP;
 888                 } else {
 889                         fid = &lma->lma_self_fid;
 890                         if (lma->lma_compat & LMAC_STRIPE_INFO &&
 891                             osd->od_is_ost)
 892                                 obj->oo_pfid_in_lma = 1;
 893                         if (unlikely(lma->lma_incompat & LMAI_REMOTE_PARENT) &&
 894                             !osd->od_is_ost)
 895                                 lu_object_set_agent_entry(&obj->oo_dt.do_lu);
 896                 }
 897         }
 898
 899         if (fid != NULL && unlikely(!lu_fid_eq(rfid, fid))) {
 900                 if (fid_is_idif(rfid) && fid_is_idif(fid)) {
 901                         struct ost_id   *oi   = &info->oti_ostid;
 902                         struct lu_fid   *fid1 = &info->oti_fid3;
 903                         __u32            idx  = fid_idif_ost_idx(rfid);
 904
 905                         /*
 906                          * For old IDIF, the OST index is not part of the IDIF,
 907                          * Means that different OSTs may have the same IDIFs.
 908                          * Under such case, we need to make some compatible
 909                          * check to make sure to trigger OI scrub properly.
 910                          */
 911                         if (idx != 0 && fid_idif_ost_idx(fid) == 0) {
 912                                 /* Given @rfid is new, LMA is old. */
 913                                 fid_to_ostid(fid, oi);
 914                                 ostid_to_fid(fid1, oi, idx);
 915                                 if (lu_fid_eq(fid1, rfid)) {
 916                                         if (osd->od_index_in_idif)
 917                                                 osd_lma_self_repair(info, osd,
 918                                                         inode, rfid,
 919                                                         LMAC_FID_ON_OST);
 920                                         RETURN(0);
 921                                 }
 922                         }
 923                 }
 924
 925                 rc = -EREMCHG;
 926         }
 927
 928         RETURN(rc);
 929 }
 930
 931 struct osd_check_lmv_buf {
 932         /* please keep it as first member */
 933         struct dir_context ctx;
 934         struct osd_thread_info *oclb_info;
 935         struct osd_device *oclb_dev;
 936         struct osd_idmap_cache *oclb_oic;
 937         int oclb_items;
 938         bool oclb_found;
 939 };
 940
 941 /**
 942  * It is called internally by ->iterate*() to filter out the
 943  * local slave object's FID of the striped directory.
 944  *
 945  * \retval      1 found the local slave's FID
 946  * \retval      0 continue to check next item
 947  * \retval      -ve for failure
 948  */
 949 #ifdef HAVE_FILLDIR_USE_CTX
 950 static int osd_stripe_dir_filldir(struct dir_context *buf,
 951 #else
 952 static int osd_stripe_dir_filldir(void *buf,
 953 #endif
 954                                   const char *name, int namelen,
 955                                   loff_t offset, __u64 ino, unsigned int d_type)
 956 {
 957         struct osd_check_lmv_buf *oclb = (struct osd_check_lmv_buf *)buf;
 958         struct osd_thread_info *oti = oclb->oclb_info;
 959         struct lu_fid *fid = &oti->oti_fid3;
 960         struct osd_inode_id *id = &oti->oti_id3;
 961         struct osd_device *dev = oclb->oclb_dev;
 962         struct osd_idmap_cache *oic = oclb->oclb_oic;
 963         struct inode *inode;
 964
 965         oclb->oclb_items++;
 966
 967         if (name[0] == '.')
 968                 return 0;
 969
 970         fid_zero(fid);
 971         sscanf(name + 1, SFID, RFID(fid));
 972         if (!fid_is_sane(fid))
 973                 return 0;
 974
 975         if (osd_remote_fid(oti->oti_env, dev, fid))
 976                 return 0;
 977
 978         osd_id_gen(id, ino, OSD_OII_NOGEN);
 979         inode = osd_iget(oti, dev, id);
 980         if (IS_ERR(inode))
 981                 return PTR_ERR(inode);
 982
 983         iput(inode);
 984         osd_add_oi_cache(oti, dev, id, fid);
 985         oic->oic_fid = *fid;
 986         oic->oic_lid = *id;
 987         oic->oic_dev = dev;
 988         osd_oii_insert(dev, oic, true);
 989         oclb->oclb_found = true;
 990
 991         return 1;
 992 }
 993
 994 /*
 995  * When lookup item under striped directory, we need to locate the master
 996  * MDT-object of the striped directory firstly, then the client will send
 997  * lookup (getattr_by_name) RPC to the MDT with some slave MDT-object's FID
 998  * and the item's name. If the system is restored from MDT file level backup,
 999  * then before the OI scrub completely built the OI files, the OI mappings of
1000  * the master MDT-object and slave MDT-object may be invalid. Usually, it is
1001  * not a problem for the master MDT-object. Because when locate the master
1002  * MDT-object, we will do name based lookup (for the striped directory itself)
1003  * firstly, during such process we can setup the correct OI mapping for the
1004  * master MDT-object. But it will be trouble for the slave MDT-object. Because
1005  * the client will not trigger name based lookup on the MDT to locate the slave
1006  * MDT-object before locating item under the striped directory, then when
1007  * osd_fid_lookup(), it will find that the OI mapping for the slave MDT-object
1008  * is invalid and does not know what the right OI mapping is, then the MDT has
1009  * to return -EINPROGRESS to the client to notify that the OI scrub is rebuiding
1010  * the OI file, related OI mapping is unknown yet, please try again later. And
1011  * then client will re-try the RPC again and again until related OI mapping has
1012  * been updated. That is quite inefficient.
1013  *
1014  * To resolve above trouble, we will handle it as the following two cases:
1015  *
1016  * 1) The slave MDT-object and the master MDT-object are on different MDTs.
1017  *    It is relative easy. Be as one of remote MDT-objects, the slave MDT-object
1018  *    is linked under /REMOTE_PARENT_DIR with the name of its FID string.
1019  *    We can locate the slave MDT-object via lookup the /REMOTE_PARENT_DIR
1020  *    directly. Please check osd_fid_lookup().
1021  *
1022  * 2) The slave MDT-object and the master MDT-object reside on the same MDT.
1023  *    Under such case, during lookup the master MDT-object, we will lookup the
1024  *    slave MDT-object via readdir against the master MDT-object, because the
1025  *    slave MDT-objects information are stored as sub-directories with the name
1026  *    "${FID}:${index}". Then when find the local slave MDT-object, its OI
1027  *    mapping will be recorded. Then subsequent osd_fid_lookup() will know
1028  *    the correct OI mapping for the slave MDT-object.
1029  */
1030 static int osd_check_lmv(struct osd_thread_info *oti, struct osd_device *dev,
1031                          struct inode *inode, struct osd_idmap_cache *oic)
1032 {
1033         struct lu_buf *buf = &oti->oti_big_buf;
1034         struct dentry *dentry = &oti->oti_obj_dentry;
1035         struct file *filp;
1036         struct lmv_mds_md_v1 *lmv1;
1037         struct osd_check_lmv_buf oclb = {
1038                 .ctx.actor = osd_stripe_dir_filldir,
1039                 .oclb_info = oti,
1040                 .oclb_dev = dev,
1041                 .oclb_oic = oic,
1042                 .oclb_found = false,
1043         };
1044         int rc = 0;
1045
1046         ENTRY;
1047
1048 again:
1049         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMV, buf->lb_buf,
1050                              buf->lb_len);
1051         if (rc == -ERANGE) {
1052                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMV, NULL, 0);
1053                 if (rc > 0) {
1054                         lu_buf_realloc(buf, rc);
1055                         if (buf->lb_buf == NULL)
1056                                 GOTO(out, rc = -ENOMEM);
1057
1058                         goto again;
1059                 }
1060         }
1061
1062         if (unlikely(rc == 0 || rc == -ENODATA))
1063                 GOTO(out, rc = 0);
1064
1065         if (rc < 0)
1066                 GOTO(out, rc);
1067
1068         if (unlikely(buf->lb_buf == NULL)) {
1069                 lu_buf_realloc(buf, rc);
1070                 if (buf->lb_buf == NULL)
1071                         GOTO(out, rc = -ENOMEM);
1072
1073                 goto again;
1074         }
1075
1076         lmv1 = buf->lb_buf;
1077         if (le32_to_cpu(lmv1->lmv_magic) != LMV_MAGIC_V1)
1078                 GOTO(out, rc = 0);
1079
1080         filp = osd_quasi_file(oti->oti_env, inode);
1081         rc = osd_security_file_alloc(filp);
1082         if (rc)
1083                 goto out;
1084
1085         do {
1086                 oclb.oclb_items = 0;
1087                 rc = iterate_dir(filp, &oclb.ctx);
1088         } while (rc >= 0 && oclb.oclb_items > 0 && !oclb.oclb_found &&
1089                  filp->f_pos != LDISKFS_HTREE_EOF_64BIT);
1090         inode->i_fop->release(inode, filp);
1091
1092 out:
1093         if (rc < 0)
1094                 CDEBUG(D_LFSCK,
1095                        "%s: cannot check LMV, ino = %lu/%u "DFID": rc = %d\n",
1096                        osd_ino2name(inode), inode->i_ino, inode->i_generation,
1097                        PFID(&oic->oic_fid), rc);
1098         else
1099                 rc = 0;
1100
1101         RETURN(rc);
1102 }
1103
1104 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
1105                           const struct lu_fid *fid,
1106                           const struct lu_object_conf *conf)
1107 {
1108         struct osd_thread_info *info;
1109         struct lu_device *ldev = obj->oo_dt.do_lu.lo_dev;
1110         struct osd_device *dev;
1111         struct osd_idmap_cache *oic;
1112         struct osd_inode_id *id;
1113         struct inode *inode = NULL;
1114         struct lustre_scrub *scrub;
1115         struct scrub_file *sf;
1116         __u32 flags = SS_CLEAR_DRYRUN | SS_CLEAR_FAILOUT | SS_AUTO_FULL;
1117         __u32 saved_ino;
1118         __u32 saved_gen;
1119         int result = 0;
1120         int rc1 = 0;
1121         bool remote = false;
1122         bool trusted = true;
1123         bool updated = false;
1124         bool checked = false;
1125
1126         ENTRY;
1127
1128         LINVRNT(osd_invariant(obj));
1129         LASSERT(obj->oo_inode == NULL);
1130         LASSERTF(fid_is_sane(fid) || fid_is_idif(fid), DFID"\n", PFID(fid));
1131
1132         dev = osd_dev(ldev);
1133         scrub = &dev->od_scrub.os_scrub;
1134         sf = &scrub->os_file;
1135         info = osd_oti_get(env);
1136         LASSERT(info);
1137         oic = &info->oti_cache;
1138
1139         if (OBD_FAIL_CHECK(OBD_FAIL_SRV_ENOENT))
1140                 RETURN(-ENOENT);
1141
1142         /*
1143          * For the object is created as locking anchor, or for the object to
1144          * be created on disk. No need to osd_oi_lookup() at here because FID
1145          * shouldn't never be re-used, if it's really a duplicate FID from
1146          * unexpected reason, we should be able to detect it later by calling
1147          * do_create->osd_oi_insert().
1148          */
1149         if (conf && conf->loc_flags & LOC_F_NEW)
1150                 GOTO(out, result = 0);
1151
1152         /* Search order: 1. per-thread cache. */
1153         if (lu_fid_eq(fid, &oic->oic_fid) && likely(oic->oic_dev == dev)) {
1154                 id = &oic->oic_lid;
1155                 goto iget;
1156         }
1157
1158         id = &info->oti_id;
1159         if (!list_empty(&scrub->os_inconsistent_items)) {
1160                 /* Search order: 2. OI scrub pending list. */
1161                 result = osd_oii_lookup(dev, fid, id);
1162                 if (!result)
1163                         goto iget;
1164         }
1165
1166         /*
1167          * The OI mapping in the OI file can be updated by the OI scrub
1168          * when we locate the inode via FID. So it may be not trustable.
1169          */
1170         trusted = false;
1171
1172         /* Search order: 3. OI files. */
1173         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1174         if (result == -ENOENT) {
1175                 if (!(fid_is_norm(fid) || fid_is_igif(fid)) ||
1176                     fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
1177                     !ldiskfs_test_bit(osd_oi_fid2idx(dev, fid),
1178                                       sf->sf_oi_bitmap))
1179                         GOTO(out, result = 0);
1180
1181                 goto trigger;
1182         }
1183
1184         /* -ESTALE is returned if inode of OST object doesn't exist */
1185         if (result == -ESTALE &&
1186             fid_is_on_ost(info, dev, fid, OI_CHECK_FLD)) {
1187                 GOTO(out, result = 0);
1188         }
1189
1190         if (result)
1191                 GOTO(out, result);
1192
1193 iget:
1194         obj->oo_inode = NULL;
1195         /* for later passes through checks, not true on first pass */
1196         if (!IS_ERR_OR_NULL(inode))
1197                 iput(inode);
1198
1199         inode = osd_iget_check(info, dev, fid, id, trusted);
1200         if (!IS_ERR(inode)) {
1201                 obj->oo_inode = inode;
1202                 result = 0;
1203                 if (remote)
1204                         goto trigger;
1205
1206                 goto check_lma;
1207         }
1208
1209         result = PTR_ERR(inode);
1210         if (result == -ENOENT || result == -ESTALE)
1211                 GOTO(out, result = 0);
1212
1213         if (result != -EREMCHG)
1214                 GOTO(out, result);
1215
1216 trigger:
1217         /*
1218          * We still have chance to get the valid inode: for the
1219          * object which is referenced by remote name entry, the
1220          * object on the local MDT will be linked under the dir
1221          * of "/REMOTE_PARENT_DIR" with its FID string as name.
1222          *
1223          * We do not know whether the object for the given FID
1224          * is referenced by some remote name entry or not, and
1225          * especially for DNE II, a multiple-linked object may
1226          * have many name entries reside on many MDTs.
1227          *
1228          * To simplify the operation, OSD will not distinguish
1229          * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
1230          * only happened for the RPC from other MDT during the
1231          * OI scrub, or for the client side RPC with FID only,
1232          * such as FID to path, or from old connected client.
1233          */
1234         if (!remote) {
1235                 rc1 = osd_lookup_in_remote_parent(info, dev, fid, id);
1236                 if (!rc1) {
1237                         remote = true;
1238                         trusted = true;
1239                         flags |= SS_AUTO_PARTIAL;
1240                         flags &= ~SS_AUTO_FULL;
1241                         goto iget;
1242                 }
1243         }
1244
1245         if (scrub->os_running) {
1246                 if (scrub->os_partial_scan && !scrub->os_in_join)
1247                         goto join;
1248
1249                 osd_add_oi_cache(info, dev, id, fid);
1250                 if (IS_ERR_OR_NULL(inode) || result) {
1251                         osd_oii_insert(dev, oic, result == -ENOENT);
1252                         GOTO(out, result = -EINPROGRESS);
1253                 }
1254
1255                 LASSERT(remote);
1256                 LASSERT(obj->oo_inode == inode);
1257
1258                 osd_oii_insert(dev, oic, true);
1259                 goto found;
1260         }
1261
1262         if (dev->od_auto_scrub_interval == AS_NEVER) {
1263                 if (!remote)
1264                         GOTO(out, result = -EREMCHG);
1265
1266                 LASSERT(!result);
1267                 LASSERT(obj->oo_inode == inode);
1268
1269                 osd_add_oi_cache(info, dev, id, fid);
1270                 goto found;
1271         }
1272
1273 join:
1274         rc1 = osd_scrub_start(env, dev, flags);
1275         LCONSOLE_WARN("%s: trigger OI scrub by RPC for the " DFID" with flags "
1276                       "0x%x, rc = %d\n", osd_name(dev), PFID(fid), flags, rc1);
1277         if (rc1 && rc1 != -EALREADY)
1278                 GOTO(out, result = -EREMCHG);
1279
1280         osd_add_oi_cache(info, dev, id, fid);
1281         if (IS_ERR_OR_NULL(inode) || result) {
1282                 osd_oii_insert(dev, oic, result == -ENOENT);
1283                 GOTO(out, result = -EINPROGRESS);
1284         }
1285
1286         LASSERT(remote);
1287         LASSERT(obj->oo_inode == inode);
1288
1289         osd_oii_insert(dev, oic, true);
1290         goto found;
1291
1292 check_lma:
1293         checked = true;
1294         if (unlikely(obj->oo_header))
1295                 goto found;
1296
1297         result = osd_check_lma(env, obj);
1298         if (!result)
1299                 goto found;
1300
1301         LASSERTF(id->oii_ino == inode->i_ino &&
1302                  id->oii_gen == inode->i_generation,
1303                  "locate wrong inode for FID: "DFID", %u/%u => %ld/%u\n",
1304                  PFID(fid), id->oii_ino, id->oii_gen,
1305                  inode->i_ino, inode->i_generation);
1306
1307         saved_ino = inode->i_ino;
1308         saved_gen = inode->i_generation;
1309
1310         if (unlikely(result == -ENODATA)) {
1311                 /*
1312                  * If the OI scrub updated the OI mapping by race, it
1313                  * must be valid. Trust the inode that has no LMA EA.
1314                  */
1315                 if (updated)
1316                         goto found;
1317
1318                 result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1319                 if (!result) {
1320                         /*
1321                          * The OI mapping is still there, the inode is still
1322                          * valid. It is just becaues the inode has no LMA EA.
1323                          */
1324                         if (saved_ino == id->oii_ino &&
1325                             saved_gen == id->oii_gen)
1326                                 goto found;
1327
1328                         /*
1329                          * It is the OI scrub updated the OI mapping by race.
1330                          * The new OI mapping must be valid.
1331                          */
1332                         trusted = true;
1333                         updated = true;
1334                         goto iget;
1335                 }
1336
1337                 /*
1338                  * "result == -ENOENT" means that the OI mappinghas been
1339                  * removed by race, so the inode belongs to other object.
1340                  *
1341                  * Others error can be returned  directly.
1342                  */
1343                 if (result == -ENOENT) {
1344                         LASSERT(trusted);
1345
1346                         obj->oo_inode = NULL;
1347                         result = 0;
1348                 }
1349         }
1350
1351         if (result != -EREMCHG)
1352                 GOTO(out, result);
1353
1354         LASSERT(!updated);
1355
1356         /*
1357          * if two OST objects map to the same inode, and inode mode is
1358          * (S_IFREG | S_ISUID | S_ISGID | S_ISVTX | 0666), which means it's
1359          * reserved by precreate, and not written yet, in this case, don't
1360          * set inode for the object whose FID mismatch, so that it can create
1361          * inode and not block precreate.
1362          */
1363         if (fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) &&
1364             inode->i_mode == (S_IFREG | S_ISUID | S_ISGID | S_ISVTX | 0666)) {
1365                 obj->oo_inode = NULL;
1366                 GOTO(out, result = 0);
1367         }
1368
1369         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1370         /*
1371          * "result == -ENOENT" means the cached OI mapping has been removed
1372          * from the OI file by race, above inode belongs to other object.
1373          */
1374         if (result == -ENOENT) {
1375                 LASSERT(trusted);
1376
1377                 obj->oo_inode = NULL;
1378                 GOTO(out, result = 0);
1379         }
1380
1381         if (result)
1382                 GOTO(out, result);
1383
1384         if (saved_ino == id->oii_ino && saved_gen == id->oii_gen) {
1385                 result = -EREMCHG;
1386                 goto trigger;
1387         }
1388
1389         /*
1390          * It is the OI scrub updated the OI mapping by race.
1391          * The new OI mapping must be valid.
1392          */
1393         trusted = true;
1394         updated = true;
1395         goto iget;
1396
1397 found:
1398         if (!checked) {
1399                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
1400                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
1401
1402                 result = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
1403                 if (!result) {
1404                         if (lma->lma_compat & LMAC_STRIPE_INFO &&
1405                             dev->od_is_ost)
1406                                 obj->oo_pfid_in_lma = 1;
1407                         if (unlikely(lma->lma_incompat & LMAI_REMOTE_PARENT) &&
1408                             !dev->od_is_ost)
1409                                 lu_object_set_agent_entry(&obj->oo_dt.do_lu);
1410                 } else if (result != -ENODATA) {
1411                         GOTO(out, result);
1412                 }
1413         }
1414
1415         obj->oo_compat_dot_created = 1;
1416         obj->oo_compat_dotdot_created = 1;
1417
1418         if (S_ISDIR(inode->i_mode) &&
1419             (flags & SS_AUTO_PARTIAL || sf->sf_status == SS_SCANNING))
1420                 osd_check_lmv(info, dev, inode, oic);
1421
1422         result = osd_attach_jinode(inode);
1423         if (result)
1424                 GOTO(out, result);
1425
1426         if (!ldiskfs_pdo)
1427                 GOTO(out, result = 0);
1428
1429         LASSERT(!obj->oo_hl_head);
1430         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
1431
1432         GOTO(out, result = (!obj->oo_hl_head ? -ENOMEM : 0));
1433
1434 out:
1435         if (result || !obj->oo_inode) {
1436                 if (!IS_ERR_OR_NULL(inode))
1437                         iput(inode);
1438
1439                 obj->oo_inode = NULL;
1440                 if (trusted)
1441                         fid_zero(&oic->oic_fid);
1442         }
1443
1444         LINVRNT(osd_invariant(obj));
1445         return result;
1446 }
1447
1448 /*
1449  * Concurrency: shouldn't matter.
1450  */
1451 static void osd_object_init0(struct osd_object *obj)
1452 {
1453         LASSERT(obj->oo_inode != NULL);
1454         obj->oo_dt.do_body_ops = &osd_body_ops;
1455         obj->oo_dt.do_lu.lo_header->loh_attr |=
1456                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
1457 }
1458
1459 /*
1460  * Concurrency: no concurrent access is possible that early in object
1461  * life-cycle.
1462  */
1463 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
1464                            const struct lu_object_conf *conf)
1465 {
1466         struct osd_object *obj = osd_obj(l);
1467         int result;
1468
1469         LINVRNT(osd_invariant(obj));
1470
1471         if (OBD_FAIL_PRECHECK(OBD_FAIL_MDS_LLOG_UMOUNT_RACE) &&
1472             cfs_fail_val == 2) {
1473                 struct osd_thread_info *info = osd_oti_get(env);
1474                 struct osd_idmap_cache *oic = &info->oti_cache;
1475                 /* invalidate thread cache */
1476                 memset(&oic->oic_fid, 0, sizeof(oic->oic_fid));
1477         }
1478         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
1479                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
1480                 l->lo_header->loh_attr |= LOHA_EXISTS;
1481                 return 0;
1482         }
1483
1484         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
1485         obj->oo_dt.do_body_ops = &osd_body_ops_new;
1486         if (result == 0 && obj->oo_inode != NULL) {
1487                 struct osd_thread_info *oti = osd_oti_get(env);
1488                 struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
1489
1490                 osd_object_init0(obj);
1491                 if (unlikely(obj->oo_header))
1492                         return 0;
1493
1494                 result = osd_get_lma(oti, obj->oo_inode,
1495                                      &oti->oti_obj_dentry, loa);
1496                 if (!result) {
1497                         /*
1498                          * Convert LMAI flags to lustre LMA flags
1499                          * and cache it to oo_lma_flags
1500                          */
1501                         obj->oo_lma_flags =
1502                                 lma_to_lustre_flags(loa->loa_lma.lma_incompat);
1503                 } else if (result == -ENODATA) {
1504                         result = 0;
1505                 }
1506         }
1507         obj->oo_dirent_count = LU_DIRENT_COUNT_UNSET;
1508
1509         LINVRNT(osd_invariant(obj));
1510         return result;
1511 }
1512
1513 /*
1514  * The first part of oxe_buf is xattr name, and is '\0' terminated.
1515  * The left part is for value, binary mode.
1516  */
1517 struct osd_xattr_entry {
1518         struct list_head        oxe_list;
1519         size_t                  oxe_len;
1520         size_t                  oxe_namelen;
1521         bool                    oxe_exist;
1522         struct rcu_head         oxe_rcu;
1523         char                    oxe_buf[0];
1524 };
1525
1526 static int osd_oxc_get(struct osd_object *obj, const char *name,
1527                        struct lu_buf *buf)
1528 {
1529         struct osd_xattr_entry *tmp;
1530         struct osd_xattr_entry *oxe = NULL;
1531         size_t namelen = strlen(name);
1532         int rc;
1533
1534         rcu_read_lock();
1535         list_for_each_entry_rcu(tmp, &obj->oo_xattr_list, oxe_list) {
1536                 if (namelen == tmp->oxe_namelen &&
1537                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1538                         oxe = tmp;
1539                         break;
1540                 }
1541         }
1542
1543         if (oxe == NULL)
1544                 GOTO(out, rc = -ENOENT);
1545
1546         if (!oxe->oxe_exist)
1547                 GOTO(out, rc = -ENODATA);
1548
1549         /* vallen */
1550         rc = oxe->oxe_len - sizeof(*oxe) - oxe->oxe_namelen - 1;
1551         LASSERT(rc > 0);
1552
1553         if (buf->lb_buf == NULL)
1554                 GOTO(out, rc);
1555
1556         if (buf->lb_len < rc)
1557                 GOTO(out, rc = -ERANGE);
1558
1559         memcpy(buf->lb_buf, &oxe->oxe_buf[namelen + 1], rc);
1560 out:
1561         rcu_read_unlock();
1562
1563         return rc;
1564 }
1565
1566 static void osd_oxc_free(struct rcu_head *head)
1567 {
1568         struct osd_xattr_entry *oxe;
1569
1570         oxe = container_of(head, struct osd_xattr_entry, oxe_rcu);
1571         OBD_FREE(oxe, oxe->oxe_len);
1572 }
1573
1574 static void osd_oxc_add(struct osd_object *obj, const char *name,
1575                         const char *buf, int buflen)
1576 {
1577         struct osd_xattr_entry *oxe;
1578         struct osd_xattr_entry *old = NULL;
1579         struct osd_xattr_entry *tmp;
1580         size_t namelen = strlen(name);
1581         size_t len = sizeof(*oxe) + namelen + 1 + buflen;
1582
1583         OBD_ALLOC(oxe, len);
1584         if (oxe == NULL)
1585                 return;
1586
1587         INIT_LIST_HEAD(&oxe->oxe_list);
1588         oxe->oxe_len = len;
1589         oxe->oxe_namelen = namelen;
1590         memcpy(oxe->oxe_buf, name, namelen);
1591         if (buflen > 0) {
1592                 LASSERT(buf != NULL);
1593                 memcpy(oxe->oxe_buf + namelen + 1, buf, buflen);
1594                 oxe->oxe_exist = true;
1595         } else {
1596                 oxe->oxe_exist = false;
1597         }
1598
1599         /* this should be rarely called, just remove old and add new */
1600         spin_lock(&obj->oo_guard);
1601         list_for_each_entry(tmp, &obj->oo_xattr_list, oxe_list) {
1602                 if (namelen == tmp->oxe_namelen &&
1603                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1604                         old = tmp;
1605                         break;
1606                 }
1607         }
1608         if (old != NULL) {
1609                 list_replace_rcu(&old->oxe_list, &oxe->oxe_list);
1610                 call_rcu(&old->oxe_rcu, osd_oxc_free);
1611         } else {
1612                 list_add_tail_rcu(&oxe->oxe_list, &obj->oo_xattr_list);
1613         }
1614         spin_unlock(&obj->oo_guard);
1615 }
1616
1617 static void osd_oxc_del(struct osd_object *obj, const char *name)
1618 {
1619         struct osd_xattr_entry *oxe;
1620         size_t namelen = strlen(name);
1621
1622         spin_lock(&obj->oo_guard);
1623         list_for_each_entry(oxe, &obj->oo_xattr_list, oxe_list) {
1624                 if (namelen == oxe->oxe_namelen &&
1625                     strncmp(name, oxe->oxe_buf, namelen) == 0) {
1626                         list_del_rcu(&oxe->oxe_list);
1627                         call_rcu(&oxe->oxe_rcu, osd_oxc_free);
1628                         break;
1629                 }
1630         }
1631         spin_unlock(&obj->oo_guard);
1632 }
1633
1634 static void osd_oxc_fini(struct osd_object *obj)
1635 {
1636         struct osd_xattr_entry *oxe, *next;
1637
1638         list_for_each_entry_safe(oxe, next, &obj->oo_xattr_list, oxe_list) {
1639                 list_del(&oxe->oxe_list);
1640                 OBD_FREE(oxe, oxe->oxe_len);
1641         }
1642 }
1643
1644 /*
1645  * Concurrency: no concurrent access is possible that late in object
1646  * life-cycle.
1647  */
1648 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
1649 {
1650         struct osd_object *obj = osd_obj(l);
1651         struct lu_object_header *h = obj->oo_header;
1652
1653         LINVRNT(osd_invariant(obj));
1654
1655         osd_oxc_fini(obj);
1656         dt_object_fini(&obj->oo_dt);
1657         if (obj->oo_hl_head != NULL)
1658                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
1659         /* obj doesn't contain an lu_object_header, so we don't need call_rcu */
1660         OBD_FREE_PTR(obj);
1661         if (unlikely(h))
1662                 lu_object_header_free(h);
1663 }
1664
1665 /*
1666  * Concurrency: no concurrent access is possible that late in object
1667  * life-cycle.
1668  */
1669 static void osd_index_fini(struct osd_object *o)
1670 {
1671         struct iam_container *bag;
1672
1673         if (o->oo_dir != NULL) {
1674                 bag = &o->oo_dir->od_container;
1675                 if (o->oo_inode != NULL) {
1676                         if (bag->ic_object == o->oo_inode)
1677                                 iam_container_fini(bag);
1678                 }
1679                 OBD_FREE_PTR(o->oo_dir);
1680                 o->oo_dir = NULL;
1681         }
1682 }
1683
1684 enum {
1685         OSD_TXN_OI_DELETE_CREDITS    = 20,
1686         OSD_TXN_INODE_DELETE_CREDITS = 20
1687 };
1688
1689 /*
1690  * Journal
1691  */
1692
1693 #if OSD_THANDLE_STATS
1694 /**
1695  * Set time when the handle is allocated
1696  */
1697 static void osd_th_alloced(struct osd_thandle *oth)
1698 {
1699         oth->oth_alloced = ktime_get();
1700 }
1701
1702 /**
1703  * Set time when the handle started
1704  */
1705 static void osd_th_started(struct osd_thandle *oth)
1706 {
1707         oth->oth_started = ktime_get();
1708 }
1709
1710 /**
1711  * Check whether the we deal with this handle for too long.
1712  */
1713 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
1714                                 ktime_t alloced, ktime_t started,
1715                                 ktime_t closed)
1716 {
1717         ktime_t now = ktime_get();
1718
1719         LASSERT(dev != NULL);
1720
1721         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
1722                             ktime_us_delta(started, alloced));
1723         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
1724                             ktime_us_delta(closed, started));
1725         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
1726                             ktime_us_delta(now, closed));
1727
1728         if (ktime_before(ktime_add_ns(alloced, 30 * NSEC_PER_SEC), now)) {
1729                 CWARN("transaction handle %p was open for too long: now %lld, alloced %lld, started %lld, closed %lld\n",
1730                                 oth, now, alloced, started, closed);
1731                 libcfs_debug_dumpstack(NULL);
1732         }
1733 }
1734
1735 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
1736 {                                                                       \
1737         ktime_t __closed = ktime_get();                                 \
1738         ktime_t __alloced = oth->oth_alloced;                           \
1739         ktime_t __started = oth->oth_started;                           \
1740                                                                         \
1741         expr;                                                           \
1742         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
1743 }
1744
1745 #else /* OSD_THANDLE_STATS */
1746
1747 #define osd_th_alloced(h)                  do {} while(0)
1748 #define osd_th_started(h)                  do {} while(0)
1749 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
1750
1751 #endif /* OSD_THANDLE_STATS */
1752
1753 /*
1754  * Concurrency: doesn't access mutable data.
1755  */
1756 static int osd_param_is_not_sane(const struct osd_device *dev,
1757                                  const struct thandle *th)
1758 {
1759         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
1760
1761         return oh->ot_credits > osd_transaction_size(dev);
1762 }
1763
1764 /*
1765  * Concurrency: shouldn't matter.
1766  */
1767 static void osd_trans_commit_cb(struct super_block *sb,
1768                                 struct ldiskfs_journal_cb_entry *jcb, int error)
1769 {
1770         struct osd_thandle *oh = container_of(jcb, struct osd_thandle, ot_jcb);
1771         struct thandle *th = &oh->ot_super;
1772         struct lu_device *lud = &th->th_dev->dd_lu_dev;
1773         struct osd_device *osd = osd_dev(lud);
1774         struct dt_txn_commit_cb *dcb, *tmp;
1775
1776         LASSERT(oh->ot_handle == NULL);
1777
1778         if (error)
1779                 CERROR("transaction @0x%p commit error: %d\n", th, error);
1780
1781         OBD_FAIL_TIMEOUT(OBD_FAIL_OST_DELAY_TRANS, 40);
1782         /* call per-transaction callbacks if any */
1783         list_for_each_entry_safe(dcb, tmp, &oh->ot_commit_dcb_list,
1784                                  dcb_linkage) {
1785                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
1786                          "commit callback entry: magic=%x name='%s'\n",
1787                          dcb->dcb_magic, dcb->dcb_name);
1788                 list_del_init(&dcb->dcb_linkage);
1789                 dcb->dcb_func(NULL, th, dcb, error);
1790         }
1791
1792         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
1793         if (atomic_dec_and_test(&osd->od_commit_cb_in_flight))
1794                 wake_up(&osd->od_commit_cb_done);
1795         th->th_dev = NULL;
1796
1797         OBD_FREE_PTR(oh);
1798 }
1799
1800 static struct thandle *osd_trans_create(const struct lu_env *env,
1801                                         struct dt_device *d)
1802 {
1803         struct osd_thread_info *oti = osd_oti_get(env);
1804         struct osd_iobuf *iobuf = &oti->oti_iobuf;
1805         struct osd_thandle *oh;
1806         struct thandle *th;
1807
1808         ENTRY;
1809
1810         if (d->dd_rdonly) {
1811                 CERROR("%s: someone try to start transaction under "
1812                        "readonly mode, should be disabled.\n",
1813                        osd_name(osd_dt_dev(d)));
1814                 dump_stack();
1815                 RETURN(ERR_PTR(-EROFS));
1816         }
1817
1818         /* on pending IO in this thread should left from prev. request */
1819         LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
1820
1821         sb_start_write(osd_sb(osd_dt_dev(d)));
1822
1823         OBD_ALLOC_GFP(oh, sizeof(*oh), GFP_NOFS);
1824         if (!oh) {
1825                 sb_end_write(osd_sb(osd_dt_dev(d)));
1826                 RETURN(ERR_PTR(-ENOMEM));
1827         }
1828
1829         oh->ot_quota_trans = &oti->oti_quota_trans;
1830         memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
1831         th = &oh->ot_super;
1832         th->th_dev = d;
1833         th->th_result = 0;
1834         oh->ot_credits = 0;
1835         INIT_LIST_HEAD(&oh->ot_commit_dcb_list);
1836         INIT_LIST_HEAD(&oh->ot_stop_dcb_list);
1837         INIT_LIST_HEAD(&oh->ot_trunc_locks);
1838         osd_th_alloced(oh);
1839
1840         memset(oti->oti_declare_ops, 0,
1841                sizeof(oti->oti_declare_ops));
1842         memset(oti->oti_declare_ops_cred, 0,
1843                sizeof(oti->oti_declare_ops_cred));
1844         memset(oti->oti_declare_ops_used, 0,
1845                sizeof(oti->oti_declare_ops_used));
1846
1847         oti->oti_ins_cache_depth++;
1848
1849         RETURN(th);
1850 }
1851
1852 void osd_trans_dump_creds(const struct lu_env *env, struct thandle *th)
1853 {
1854         struct osd_thread_info *oti = osd_oti_get(env);
1855         struct osd_thandle *oh;
1856
1857         oh = container_of(th, struct osd_thandle, ot_super);
1858         LASSERT(oh != NULL);
1859
1860         CWARN("  create: %u/%u/%u, destroy: %u/%u/%u\n",
1861               oti->oti_declare_ops[OSD_OT_CREATE],
1862               oti->oti_declare_ops_cred[OSD_OT_CREATE],
1863               oti->oti_declare_ops_used[OSD_OT_CREATE],
1864               oti->oti_declare_ops[OSD_OT_DESTROY],
1865               oti->oti_declare_ops_cred[OSD_OT_DESTROY],
1866               oti->oti_declare_ops_used[OSD_OT_DESTROY]);
1867         CWARN("  attr_set: %u/%u/%u, xattr_set: %u/%u/%u\n",
1868               oti->oti_declare_ops[OSD_OT_ATTR_SET],
1869               oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
1870               oti->oti_declare_ops_used[OSD_OT_ATTR_SET],
1871               oti->oti_declare_ops[OSD_OT_XATTR_SET],
1872               oti->oti_declare_ops_cred[OSD_OT_XATTR_SET],
1873               oti->oti_declare_ops_used[OSD_OT_XATTR_SET]);
1874         CWARN("  write: %u/%u/%u, punch: %u/%u/%u, quota %u/%u/%u\n",
1875               oti->oti_declare_ops[OSD_OT_WRITE],
1876               oti->oti_declare_ops_cred[OSD_OT_WRITE],
1877               oti->oti_declare_ops_used[OSD_OT_WRITE],
1878               oti->oti_declare_ops[OSD_OT_PUNCH],
1879               oti->oti_declare_ops_cred[OSD_OT_PUNCH],
1880               oti->oti_declare_ops_used[OSD_OT_PUNCH],
1881               oti->oti_declare_ops[OSD_OT_QUOTA],
1882               oti->oti_declare_ops_cred[OSD_OT_QUOTA],
1883               oti->oti_declare_ops_used[OSD_OT_QUOTA]);
1884         CWARN("  insert: %u/%u/%u, delete: %u/%u/%u\n",
1885               oti->oti_declare_ops[OSD_OT_INSERT],
1886               oti->oti_declare_ops_cred[OSD_OT_INSERT],
1887               oti->oti_declare_ops_used[OSD_OT_INSERT],
1888               oti->oti_declare_ops[OSD_OT_DELETE],
1889               oti->oti_declare_ops_cred[OSD_OT_DELETE],
1890               oti->oti_declare_ops_used[OSD_OT_DELETE]);
1891         CWARN("  ref_add: %u/%u/%u, ref_del: %u/%u/%u\n",
1892               oti->oti_declare_ops[OSD_OT_REF_ADD],
1893               oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
1894               oti->oti_declare_ops_used[OSD_OT_REF_ADD],
1895               oti->oti_declare_ops[OSD_OT_REF_DEL],
1896               oti->oti_declare_ops_cred[OSD_OT_REF_DEL],
1897               oti->oti_declare_ops_used[OSD_OT_REF_DEL]);
1898 }
1899
1900 /*
1901  * Concurrency: shouldn't matter.
1902  */
1903 static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
1904                            struct thandle *th)
1905 {
1906         struct osd_thread_info *oti = osd_oti_get(env);
1907         struct osd_device *dev = osd_dt_dev(d);
1908         handle_t *jh;
1909         struct osd_thandle *oh;
1910         int rc;
1911
1912         ENTRY;
1913
1914         LASSERT(current->journal_info == NULL);
1915
1916         oh = container_of(th, struct osd_thandle, ot_super);
1917         LASSERT(oh != NULL);
1918         LASSERT(oh->ot_handle == NULL);
1919
1920         rc = dt_txn_hook_start(env, d, th);
1921         if (rc != 0)
1922                 GOTO(out, rc);
1923
1924         if (unlikely(osd_param_is_not_sane(dev, th))) {
1925                 static unsigned long last_printed;
1926                 static int last_credits;
1927
1928                 /*
1929                  * don't make noise on a tiny testing systems
1930                  * actual credits misuse will be caught anyway
1931                  */
1932                 if (last_credits != oh->ot_credits &&
1933                     time_after(jiffies, last_printed +
1934                                cfs_time_seconds(60)) &&
1935                     osd_transaction_size(dev) > 512) {
1936                         CWARN("%s: credits %u > trans_max %u\n", osd_name(dev),
1937                               oh->ot_credits, osd_transaction_size(dev));
1938                         osd_trans_dump_creds(env, th);
1939                         libcfs_debug_dumpstack(NULL);
1940                         last_credits = oh->ot_credits;
1941                         last_printed = jiffies;
1942                 }
1943                 /*
1944                  * XXX Limit the credits to 'max_transaction_buffers', and
1945                  *     let the underlying filesystem to catch the error if
1946                  *     we really need so many credits.
1947                  *
1948                  *     This should be removed when we can calculate the
1949                  *     credits precisely.
1950                  */
1951                 oh->ot_credits = osd_transaction_size(dev);
1952         } else if (ldiskfs_track_declares_assert != 0) {
1953                 /*
1954                  * reserve few credits to prevent an assertion in JBD
1955                  * our debugging mechanism will be able to detected
1956                  * overuse. this can help to debug single-update
1957                  * transactions
1958                  */
1959                 oh->ot_credits += 10;
1960                 if (unlikely(osd_param_is_not_sane(dev, th)))
1961                         oh->ot_credits = osd_transaction_size(dev);
1962         }
1963
1964         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_TXN_START))
1965                 GOTO(out, rc = -EIO);
1966
1967         /*
1968          * XXX temporary stuff. Some abstraction layer should
1969          * be used.
1970          */
1971         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
1972         osd_th_started(oh);
1973         if (!IS_ERR(jh)) {
1974                 oh->ot_handle = jh;
1975                 LASSERT(oti->oti_txns == 0);
1976
1977                 atomic_inc(&dev->od_commit_cb_in_flight);
1978                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
1979                               "osd-tx", th);
1980                 oti->oti_txns++;
1981                 rc = 0;
1982         } else {
1983                 rc = PTR_ERR(jh);
1984         }
1985 out:
1986         RETURN(rc);
1987 }
1988
1989 static int osd_seq_exists(const struct lu_env *env,
1990                           struct osd_device *osd, u64 seq)
1991 {
1992         struct lu_seq_range *range = &osd_oti_get(env)->oti_seq_range;
1993         struct seq_server_site *ss = osd_seq_site(osd);
1994         int rc;
1995
1996         ENTRY;
1997
1998         LASSERT(ss != NULL);
1999         LASSERT(ss->ss_server_fld != NULL);
2000
2001         rc = osd_fld_lookup(env, osd, seq, range);
2002         if (rc != 0) {
2003                 if (rc != -ENOENT)
2004                         CERROR("%s: can't lookup FLD sequence %#llx: rc = %d\n",
2005                                osd_name(osd), seq, rc);
2006                 RETURN(0);
2007         }
2008
2009         RETURN(ss->ss_node_id == range->lsr_index);
2010 }
2011
2012 static void osd_trans_stop_cb(struct osd_thandle *oth, int result)
2013 {
2014         struct dt_txn_commit_cb *dcb;
2015         struct dt_txn_commit_cb *tmp;
2016
2017         /* call per-transaction stop callbacks if any */
2018         list_for_each_entry_safe(dcb, tmp, &oth->ot_stop_dcb_list,
2019                                  dcb_linkage) {
2020                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
2021                          "commit callback entry: magic=%x name='%s'\n",
2022                          dcb->dcb_magic, dcb->dcb_name);
2023                 list_del_init(&dcb->dcb_linkage);
2024                 dcb->dcb_func(NULL, &oth->ot_super, dcb, result);
2025         }
2026 }
2027
2028 /*
2029  * Concurrency: shouldn't matter.
2030  */
2031 static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
2032                           struct thandle *th)
2033 {
2034         struct osd_thread_info *oti = osd_oti_get(env);
2035         struct osd_thandle *oh;
2036         struct osd_iobuf *iobuf = &oti->oti_iobuf;
2037         struct osd_device *osd = osd_dt_dev(th->th_dev);
2038         struct qsd_instance *qsd = osd_def_qsd(osd);
2039         struct lquota_trans *qtrans;
2040         LIST_HEAD(truncates);
2041         int rc = 0, remove_agents = 0;
2042
2043         ENTRY;
2044
2045         oh = container_of(th, struct osd_thandle, ot_super);
2046
2047         remove_agents = oh->ot_remove_agents;
2048
2049         qtrans = oh->ot_quota_trans;
2050         oh->ot_quota_trans = NULL;
2051
2052         /* move locks to local list, stop tx, execute truncates */
2053         list_splice(&oh->ot_trunc_locks, &truncates);
2054
2055         if (oh->ot_handle != NULL) {
2056                 int rc2;
2057
2058                 handle_t *hdl = oh->ot_handle;
2059
2060                 /*
2061                  * add commit callback
2062                  * notice we don't do this in osd_trans_start()
2063                  * as underlying transaction can change during truncate
2064                  */
2065                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
2066                                              &oh->ot_jcb);
2067
2068                 LASSERT(oti->oti_txns == 1);
2069                 oti->oti_txns--;
2070
2071                 rc = dt_txn_hook_stop(env, th);
2072                 if (rc != 0)
2073                         CERROR("%s: failed in transaction hook: rc = %d\n",
2074                                osd_name(osd), rc);
2075
2076                 osd_trans_stop_cb(oh, rc);
2077                 /* hook functions might modify th_sync */
2078                 hdl->h_sync = th->th_sync;
2079
2080                 oh->ot_handle = NULL;
2081                 OSD_CHECK_SLOW_TH(oh, osd, rc2 = ldiskfs_journal_stop(hdl));
2082                 if (rc2 != 0)
2083                         CERROR("%s: failed to stop transaction: rc = %d\n",
2084                                osd_name(osd), rc2);
2085                 if (!rc)
2086                         rc = rc2;
2087
2088                 osd_process_truncates(&truncates);
2089         } else {
2090                 osd_trans_stop_cb(oh, th->th_result);
2091                 OBD_FREE_PTR(oh);
2092         }
2093
2094         osd_trunc_unlock_all(env, &truncates);
2095
2096         /* inform the quota slave device that the transaction is stopping */
2097         qsd_op_end(env, qsd, qtrans);
2098
2099         /*
2100          * as we want IO to journal and data IO be concurrent, we don't block
2101          * awaiting data IO completion in osd_do_bio(), instead we wait here
2102          * once transaction is submitted to the journal. all reqular requests
2103          * don't do direct IO (except read/write), thus this wait_event becomes
2104          * no-op for them.
2105          *
2106          * IMPORTANT: we have to wait till any IO submited by the thread is
2107          * completed otherwise iobuf may be corrupted by different request
2108          */
2109         wait_event(iobuf->dr_wait,
2110                        atomic_read(&iobuf->dr_numreqs) == 0);
2111         osd_fini_iobuf(osd, iobuf);
2112         if (!rc)
2113                 rc = iobuf->dr_error;
2114
2115         if (unlikely(remove_agents != 0))
2116                 osd_process_scheduled_agent_removals(env, osd);
2117
2118         LASSERT(oti->oti_ins_cache_depth > 0);
2119         oti->oti_ins_cache_depth--;
2120         /* reset OI cache for safety */
2121         if (oti->oti_ins_cache_depth == 0)
2122                 oti->oti_ins_cache_used = 0;
2123
2124         sb_end_write(osd_sb(osd));
2125
2126         RETURN(rc);
2127 }
2128
2129 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
2130 {
2131         struct osd_thandle *oh = container_of(th, struct osd_thandle,
2132                                               ot_super);
2133
2134         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
2135         LASSERT(&dcb->dcb_func != NULL);
2136         if (dcb->dcb_flags & DCB_TRANS_STOP)
2137                 list_add(&dcb->dcb_linkage, &oh->ot_stop_dcb_list);
2138         else
2139                 list_add(&dcb->dcb_linkage, &oh->ot_commit_dcb_list);
2140
2141         return 0;
2142 }
2143
2144 /*
2145  * Called just before object is freed. Releases all resources except for
2146  * object itself (that is released by osd_object_free()).
2147  *
2148  * Concurrency: no concurrent access is possible that late in object
2149  * life-cycle.
2150  */
2151 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
2152 {
2153         struct osd_object *obj = osd_obj(l);
2154         struct qsd_instance *qsd = osd_def_qsd(osd_obj2dev(obj));
2155         struct inode *inode = obj->oo_inode;
2156         __u64 projid;
2157         qid_t uid;
2158         qid_t gid;
2159
2160         LINVRNT(osd_invariant(obj));
2161
2162         /*
2163          * If object is unlinked remove fid->ino mapping from object index.
2164          */
2165
2166         osd_index_fini(obj);
2167
2168         if (!inode)
2169                 return;
2170
2171         if (osd_has_index(obj) &&  obj->oo_dt.do_index_ops == &osd_index_iam_ops)
2172                 ldiskfs_set_inode_flag(inode, LDISKFS_INODE_JOURNAL_DATA);
2173
2174         uid = i_uid_read(inode);
2175         gid = i_gid_read(inode);
2176         projid = i_projid_read(inode);
2177
2178         obj->oo_inode = NULL;
2179         iput(inode);
2180
2181         /* do not rebalance quota if the caller needs to release memory
2182          * otherwise qsd_refresh_usage() may went into a new ldiskfs
2183          * transaction and risk to deadlock - LU-12178 */
2184         if (current->flags & (PF_MEMALLOC | PF_KSWAPD))
2185                 return;
2186
2187         if (!obj->oo_header && qsd) {
2188                 struct osd_thread_info *info = osd_oti_get(env);
2189                 struct lquota_id_info *qi = &info->oti_qi;
2190
2191                 /* Release granted quota to master if necessary */
2192                 qi->lqi_id.qid_uid = uid;
2193                 qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
2194
2195                 qi->lqi_id.qid_uid = gid;
2196                 qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
2197
2198                 qi->lqi_id.qid_uid = projid;
2199                 qsd_op_adjust(env, qsd, &qi->lqi_id, PRJQUOTA);
2200         }
2201 }
2202
2203 /*
2204  * Concurrency: ->loo_object_release() is called under site spin-lock.
2205  */
2206 static void osd_object_release(const struct lu_env *env,
2207                                struct lu_object *l)
2208 {
2209         struct osd_object *o = osd_obj(l);
2210
2211         /*
2212          * nobody should be releasing a non-destroyed object with nlink=0
2213          * the API allows this, but ldiskfs doesn't like and then report
2214          * this inode as deleted
2215          */
2216         LASSERT(!(o->oo_destroyed == 0 && o->oo_inode &&
2217                   o->oo_inode->i_nlink == 0));
2218 }
2219
2220 /*
2221  * Concurrency: shouldn't matter.
2222  */
2223 static int osd_object_print(const struct lu_env *env, void *cookie,
2224                             lu_printer_t p, const struct lu_object *l)
2225 {
2226         struct osd_object *o = osd_obj(l);
2227         struct iam_descr *d;
2228
2229         if (o->oo_dir != NULL)
2230                 d = o->oo_dir->od_container.ic_descr;
2231         else
2232                 d = NULL;
2233         return (*p)(env, cookie,
2234                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
2235                     o, o->oo_inode,
2236                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
2237                     o->oo_inode ? o->oo_inode->i_generation : 0,
2238                     d ? d->id_ops->id_name : "plain");
2239 }
2240
2241 /*
2242  * Concurrency: shouldn't matter.
2243  */
2244 int osd_statfs(const struct lu_env *env, struct dt_device *d,
2245                 struct obd_statfs *sfs, struct obd_statfs_info *info)
2246 {
2247         struct osd_device *osd = osd_dt_dev(d);
2248         struct super_block *sb = osd_sb(osd);
2249         struct kstatfs *ksfs;
2250         __u64 reserved;
2251         int result = 0;
2252
2253         if (unlikely(osd->od_mnt == NULL))
2254                 return -EINPROGRESS;
2255
2256         /* osd_lproc.c call this without env, allocate ksfs for that case */
2257         if (unlikely(env == NULL)) {
2258                 OBD_ALLOC_PTR(ksfs);
2259                 if (ksfs == NULL)
2260                         return -ENOMEM;
2261         } else {
2262                 ksfs = &osd_oti_get(env)->oti_ksfs;
2263         }
2264
2265         result = sb->s_op->statfs(sb->s_root, ksfs);
2266         if (result)
2267                 goto out;
2268
2269         statfs_pack(sfs, ksfs);
2270         if (unlikely(sb->s_flags & SB_RDONLY))
2271                 sfs->os_state |= OS_STATFS_READONLY;
2272
2273         sfs->os_state |= osd->od_nonrotational ? OS_STATFS_NONROT : 0;
2274
2275         if (ldiskfs_has_feature_extents(sb))
2276                 sfs->os_maxbytes = sb->s_maxbytes;
2277         else
2278                 sfs->os_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2279
2280         /*
2281          * Reserve some space so to avoid fragmenting the filesystem too much.
2282          * Fragmentation not only impacts performance, but can also increase
2283          * metadata overhead significantly, causing grant calculation to be
2284          * wrong.
2285          *
2286          * Reserve 0.78% of total space, at least 8MB for small filesystems.
2287          */
2288         BUILD_BUG_ON(OSD_STATFS_RESERVED <= LDISKFS_MAX_BLOCK_SIZE);
2289         reserved = OSD_STATFS_RESERVED >> sb->s_blocksize_bits;
2290         if (likely(sfs->os_blocks >= reserved << OSD_STATFS_RESERVED_SHIFT))
2291                 reserved = sfs->os_blocks >> OSD_STATFS_RESERVED_SHIFT;
2292
2293         sfs->os_blocks -= reserved;
2294         sfs->os_bfree  -= min(reserved, sfs->os_bfree);
2295         sfs->os_bavail -= min(reserved, sfs->os_bavail);
2296
2297 out:
2298         if (unlikely(env == NULL))
2299                 OBD_FREE_PTR(ksfs);
2300         return result;
2301 }
2302
2303 /**
2304  * Estimate space needed for file creations. We assume the largest filename
2305  * which is 2^64 - 1, hence a filename of 20 chars.
2306  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
2307  */
2308 #ifdef __LDISKFS_DIR_REC_LEN
2309 #define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
2310 #else
2311 #define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
2312 #endif
2313
2314 /*
2315  * Concurrency: doesn't access mutable data.
2316  */
2317 static void osd_conf_get(const struct lu_env *env,
2318                          const struct dt_device *dev,
2319                          struct dt_device_param *param)
2320 {
2321         struct osd_device *d = osd_dt_dev(dev);
2322         struct super_block *sb = osd_sb(d);
2323         struct blk_integrity *bi = bdev_get_integrity(sb->s_bdev);
2324         const char *name;
2325         int ea_overhead;
2326
2327         /*
2328          * XXX should be taken from not-yet-existing fs abstraction layer.
2329          */
2330         param->ddp_max_name_len = LDISKFS_NAME_LEN;
2331         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
2332         param->ddp_symlink_max  = sb->s_blocksize;
2333         param->ddp_mount_type   = LDD_MT_LDISKFS;
2334         if (ldiskfs_has_feature_extents(sb))
2335                 param->ddp_maxbytes = sb->s_maxbytes;
2336         else
2337                 param->ddp_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2338         /*
2339          * inode are statically allocated, so per-inode space consumption
2340          * is the space consumed by the directory entry
2341          */
2342         param->ddp_inodespace     = PER_OBJ_USAGE;
2343         /*
2344          * EXT_INIT_MAX_LEN is the theoretical maximum extent size (32k blocks
2345          * is 128MB) which is unlikely to be hit in real life. Report a smaller
2346          * maximum length to not under-count the actual number of extents
2347          * needed for writing a file if there are sub-optimal block allocations.
2348          */
2349         param->ddp_max_extent_blks = EXT_INIT_MAX_LEN >> 1;
2350         /* worst-case extent insertion metadata overhead */
2351         param->ddp_extent_tax = 6 * LDISKFS_BLOCK_SIZE(sb);
2352         param->ddp_mntopts = 0;
2353         if (test_opt(sb, XATTR_USER))
2354                 param->ddp_mntopts |= MNTOPT_USERXATTR;
2355         if (test_opt(sb, POSIX_ACL))
2356                 param->ddp_mntopts |= MNTOPT_ACL;
2357
2358         /*
2359          * LOD might calculate the max stripe count based on max_ea_size,
2360          * so we need take account in the overhead as well,
2361          * xattr_header + magic + xattr_entry_head
2362          */
2363         ea_overhead = sizeof(struct ldiskfs_xattr_header) + sizeof(__u32) +
2364                       LDISKFS_XATTR_LEN(XATTR_NAME_MAX_LEN);
2365
2366 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
2367         if (ldiskfs_has_feature_ea_inode(sb))
2368                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE -
2369                                                                 ea_overhead;
2370         else
2371 #endif
2372                 param->ddp_max_ea_size = sb->s_blocksize - ea_overhead;
2373
2374         if (param->ddp_max_ea_size > OBD_MAX_EA_SIZE)
2375                 param->ddp_max_ea_size = OBD_MAX_EA_SIZE;
2376
2377         /*
2378          * Preferred RPC size for efficient disk IO.  4MB shows good
2379          * all-around performance for ldiskfs, but use bigalloc chunk size
2380          * by default if larger.
2381          */
2382 #if defined(LDISKFS_CLUSTER_SIZE)
2383         if (LDISKFS_CLUSTER_SIZE(sb) > DT_DEF_BRW_SIZE)
2384                 param->ddp_brw_size = LDISKFS_CLUSTER_SIZE(sb);
2385         else
2386 #endif
2387                 param->ddp_brw_size = DT_DEF_BRW_SIZE;
2388
2389         param->ddp_t10_cksum_type = 0;
2390         if (bi) {
2391                 unsigned short interval = blk_integrity_interval(bi);
2392                 name = blk_integrity_name(bi);
2393                 /*
2394                  * Expected values:
2395                  * T10-DIF-TYPE1-CRC
2396                  * T10-DIF-TYPE3-CRC
2397                  * T10-DIF-TYPE1-IP
2398                  * T10-DIF-TYPE3-IP
2399                  */
2400                 if (strncmp(name, "T10-DIF-TYPE",
2401                             sizeof("T10-DIF-TYPE") - 1) == 0) {
2402                         /* also skip "1/3-" at end */
2403                         const int type_off = sizeof("T10-DIF-TYPE.");
2404                         char type_number = name[type_off - 2];
2405
2406                         if (interval != 512 && interval != 4096) {
2407                                 CERROR("%s: unsupported T10PI sector size %u\n",
2408                                        d->od_svname, interval);
2409                         } else if (type_number != '1' && type_number != '3') {
2410                                 CERROR("%s: unsupported T10PI type %s\n",
2411                                        d->od_svname, name);
2412                         } else if (strcmp(name + type_off, "CRC") == 0) {
2413                                 d->od_t10_type = type_number == '1' ?
2414                                         OSD_T10_TYPE1_CRC : OSD_T10_TYPE3_CRC;
2415                                 param->ddp_t10_cksum_type = interval == 512 ?
2416                                         OBD_CKSUM_T10CRC512 :
2417                                         OBD_CKSUM_T10CRC4K;
2418                         } else if (strcmp(name + type_off, "IP") == 0) {
2419                                 d->od_t10_type = type_number == '1' ?
2420                                         OSD_T10_TYPE1_IP : OSD_T10_TYPE3_IP;
2421                                 param->ddp_t10_cksum_type = interval == 512 ?
2422                                         OBD_CKSUM_T10IP512 :
2423                                         OBD_CKSUM_T10IP4K;
2424                         } else {
2425                                 CERROR("%s: unsupported checksum type of "
2426                                        "T10PI type '%s'",
2427                                        d->od_svname, name);
2428                         }
2429
2430                 } else {
2431                         CERROR("%s: unsupported T10PI type '%s'",
2432                                d->od_svname, name);
2433                 }
2434         }
2435
2436         param->ddp_has_lseek_data_hole = true;
2437 }
2438
2439 static struct super_block *osd_mnt_sb_get(const struct dt_device *d)
2440 {
2441         return osd_sb(osd_dt_dev(d));
2442 }
2443
2444 /*
2445  * Concurrency: shouldn't matter.
2446  */
2447 static int osd_sync(const struct lu_env *env, struct dt_device *d)
2448 {
2449         int rc;
2450         struct super_block *s = osd_sb(osd_dt_dev(d));
2451         ENTRY;
2452
2453         down_read(&s->s_umount);
2454         rc = s->s_op->sync_fs(s, 1);
2455         up_read(&s->s_umount);
2456
2457         CDEBUG(D_CACHE, "%s: synced OSD: rc = %d\n", osd_dt_dev(d)->od_svname,
2458                rc);
2459
2460         return rc;
2461 }
2462
2463 /**
2464  * Start commit for OSD device.
2465  *
2466  * An implementation of dt_commit_async method for OSD device.
2467  * Asychronously starts underlayng fs sync and thereby a transaction
2468  * commit.
2469  *
2470  * \param env environment
2471  * \param d dt device
2472  *
2473  * \see dt_device_operations
2474  */
2475 static int osd_commit_async(const struct lu_env *env,
2476                             struct dt_device *d)
2477 {
2478         struct super_block *s = osd_sb(osd_dt_dev(d));
2479         int rc;
2480
2481         ENTRY;
2482
2483         CDEBUG(D_HA, "%s: async commit OSD\n", osd_dt_dev(d)->od_svname);
2484         down_read(&s->s_umount);
2485         rc = s->s_op->sync_fs(s, 0);
2486         up_read(&s->s_umount);
2487
2488         RETURN(rc);
2489 }
2490
2491 static int (*priv_security_file_alloc)(struct file *file);
2492
2493 int osd_security_file_alloc(struct file *file)
2494 {
2495         if (priv_security_file_alloc)
2496                 return priv_security_file_alloc(file);
2497         return 0;
2498 }
2499
2500 /*
2501  * Concurrency: shouldn't matter.
2502  */
2503 static int osd_ro(const struct lu_env *env, struct dt_device *d)
2504 {
2505         struct super_block *sb = osd_sb(osd_dt_dev(d));
2506         struct block_device *dev = sb->s_bdev;
2507         int rc = -EOPNOTSUPP;
2508
2509         ENTRY;
2510
2511         CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
2512                osd_dt_dev(d)->od_svname, (long)dev, rc);
2513
2514         RETURN(rc);
2515 }
2516
2517 /**
2518  * Note: we do not count into QUOTA here.
2519  * If we mount with --data_journal we may need more.
2520  */
2521 const int osd_dto_credits_noquota[DTO_NR] = {
2522         /**
2523          * Insert.
2524          * INDEX_EXTRA_TRANS_BLOCKS(8) +
2525          * SINGLEDATA_TRANS_BLOCKS(8)
2526          * XXX Note: maybe iam need more, since iam have more level than
2527          *           EXT3 htree.
2528          */
2529         [DTO_INDEX_INSERT]  = 16,
2530         /**
2531          * Delete
2532          * just modify a single entry, probably merge few within a block
2533          */
2534         [DTO_INDEX_DELETE]  = 1,
2535         /**
2536          * Used for OI scrub
2537          */
2538         [DTO_INDEX_UPDATE]  = 16,
2539         /**
2540          * 4(inode, inode bits, groups, GDT)
2541          *   notice: OI updates are counted separately with DTO_INDEX_INSERT
2542          */
2543         [DTO_OBJECT_CREATE] = 4,
2544         /**
2545          * 4(inode, inode bits, groups, GDT)
2546          *   notice: OI updates are counted separately with DTO_INDEX_DELETE
2547          */
2548         [DTO_OBJECT_DELETE] = 4,
2549         /**
2550          * Attr set credits (inode)
2551          */
2552         [DTO_ATTR_SET_BASE] = 1,
2553         /**
2554          * Xattr set. The same as xattr of EXT3.
2555          * DATA_TRANS_BLOCKS(14)
2556          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
2557          * are also counted in. Do not know why?
2558          */
2559         [DTO_XATTR_SET]     = 14,
2560         /**
2561          * credits for inode change during write.
2562          */
2563         [DTO_WRITE_BASE]    = 3,
2564         /**
2565          * credits for single block write.
2566          */
2567         [DTO_WRITE_BLOCK]   = 14,
2568         /**
2569          * Attr set credits for chown.
2570          * This is extra credits for setattr, and it is null without quota
2571          */
2572         [DTO_ATTR_SET_CHOWN] = 0
2573 };
2574
2575 static const struct dt_device_operations osd_dt_ops = {
2576         .dt_root_get       = osd_root_get,
2577         .dt_statfs         = osd_statfs,
2578         .dt_trans_create   = osd_trans_create,
2579         .dt_trans_start    = osd_trans_start,
2580         .dt_trans_stop     = osd_trans_stop,
2581         .dt_trans_cb_add   = osd_trans_cb_add,
2582         .dt_conf_get       = osd_conf_get,
2583         .dt_mnt_sb_get     = osd_mnt_sb_get,
2584         .dt_sync           = osd_sync,
2585         .dt_ro             = osd_ro,
2586         .dt_commit_async   = osd_commit_async,
2587 };
2588
2589 static void osd_read_lock(const struct lu_env *env, struct dt_object *dt,
2590                           unsigned int role)
2591 {
2592         struct osd_object *obj = osd_dt_obj(dt);
2593         struct osd_thread_info *oti = osd_oti_get(env);
2594
2595         LINVRNT(osd_invariant(obj));
2596
2597         LASSERT(obj->oo_owner != env);
2598         down_read_nested(&obj->oo_sem, role);
2599
2600         LASSERT(obj->oo_owner == NULL);
2601         oti->oti_r_locks++;
2602 }
2603
2604 static void osd_write_lock(const struct lu_env *env, struct dt_object *dt,
2605                            unsigned int role)
2606 {
2607         struct osd_object *obj = osd_dt_obj(dt);
2608         struct osd_thread_info *oti = osd_oti_get(env);
2609
2610         LINVRNT(osd_invariant(obj));
2611
2612         LASSERT(obj->oo_owner != env);
2613         down_write_nested(&obj->oo_sem, role);
2614
2615         LASSERT(obj->oo_owner == NULL);
2616         obj->oo_owner = env;
2617         oti->oti_w_locks++;
2618 }
2619
2620 static void osd_read_unlock(const struct lu_env *env, struct dt_object *dt)
2621 {
2622         struct osd_object *obj = osd_dt_obj(dt);
2623         struct osd_thread_info *oti = osd_oti_get(env);
2624
2625         LINVRNT(osd_invariant(obj));
2626
2627         LASSERT(oti->oti_r_locks > 0);
2628         oti->oti_r_locks--;
2629         up_read(&obj->oo_sem);
2630 }
2631
2632 static void osd_write_unlock(const struct lu_env *env, struct dt_object *dt)
2633 {
2634         struct osd_object *obj = osd_dt_obj(dt);
2635         struct osd_thread_info *oti = osd_oti_get(env);
2636
2637         LINVRNT(osd_invariant(obj));
2638
2639         LASSERT(obj->oo_owner == env);
2640         LASSERT(oti->oti_w_locks > 0);
2641         oti->oti_w_locks--;
2642         obj->oo_owner = NULL;
2643         up_write(&obj->oo_sem);
2644 }
2645
2646 static int osd_write_locked(const struct lu_env *env, struct dt_object *dt)
2647 {
2648         struct osd_object *obj = osd_dt_obj(dt);
2649
2650         LINVRNT(osd_invariant(obj));
2651
2652         return obj->oo_owner == env;
2653 }
2654
2655 static void osd_inode_getattr(const struct lu_env *env,
2656                               struct inode *inode, struct lu_attr *attr)
2657 {
2658         attr->la_valid  |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
2659                            LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
2660                            LA_PROJID | LA_FLAGS | LA_NLINK | LA_RDEV |
2661                            LA_BLKSIZE | LA_TYPE | LA_BTIME;
2662
2663         attr->la_atime = inode->i_atime.tv_sec;
2664         attr->la_mtime = inode->i_mtime.tv_sec;
2665         attr->la_ctime = inode->i_ctime.tv_sec;
2666         attr->la_btime = LDISKFS_I(inode)->i_crtime.tv_sec;
2667         attr->la_mode    = inode->i_mode;
2668         attr->la_size    = i_size_read(inode);
2669         attr->la_blocks  = inode->i_blocks;
2670         attr->la_uid     = i_uid_read(inode);
2671         attr->la_gid     = i_gid_read(inode);
2672         attr->la_projid  = i_projid_read(inode);
2673         attr->la_flags   = ll_inode_to_ext_flags(inode->i_flags);
2674         attr->la_nlink   = inode->i_nlink;
2675         attr->la_rdev    = inode->i_rdev;
2676         attr->la_blksize = 1 << inode->i_blkbits;
2677         attr->la_blkbits = inode->i_blkbits;
2678         /*
2679          * Ext4 did not transfer inherit flags from raw inode
2680          * to inode flags, and ext4 internally test raw inode
2681          * @i_flags directly. Instead of patching ext4, we do it here.
2682          */
2683         if (LDISKFS_I(inode)->i_flags & LUSTRE_PROJINHERIT_FL)
2684                 attr->la_flags |= LUSTRE_PROJINHERIT_FL;
2685 }
2686
2687 static int osd_dirent_count(const struct lu_env *env, struct dt_object *dt,
2688                             u64 *count)
2689 {
2690         struct osd_object *obj = osd_dt_obj(dt);
2691         const struct dt_it_ops *iops;
2692         struct dt_it *it;
2693         int rc;
2694
2695         ENTRY;
2696
2697         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
2698         LASSERT(fid_is_namespace_visible(lu_object_fid(&obj->oo_dt.do_lu)));
2699
2700         if (obj->oo_dirent_count != LU_DIRENT_COUNT_UNSET) {
2701                 *count = obj->oo_dirent_count;
2702                 RETURN(0);
2703         }
2704
2705         /* directory not initialized yet */
2706         if (!dt->do_index_ops) {
2707                 *count = 0;
2708                 RETURN(0);
2709         }
2710
2711         iops = &dt->do_index_ops->dio_it;
2712         it = iops->init(env, dt, LUDA_64BITHASH);
2713         if (IS_ERR(it))
2714                 RETURN(PTR_ERR(it));
2715
2716         rc = iops->load(env, it, 0);
2717         if (rc < 0) {
2718                 if (rc == -ENODATA) {
2719                         rc = 0;
2720                         *count = 0;
2721                 }
2722                 GOTO(out, rc);
2723         }
2724         if (rc > 0)
2725                 rc = iops->next(env, it);
2726
2727         for (*count = 0; rc == 0 || rc == -ESTALE; rc = iops->next(env, it)) {
2728                 if (rc == -ESTALE)
2729                         continue;
2730
2731                 if (iops->key_size(env, it) == 0)
2732                         continue;
2733
2734                 (*count)++;
2735         }
2736         if (rc == 1) {
2737                 obj->oo_dirent_count = *count;
2738                 rc = 0;
2739         }
2740 out:
2741         iops->put(env, it);
2742         iops->fini(env, it);
2743
2744         RETURN(rc);
2745 }
2746
2747 static int osd_attr_get(const struct lu_env *env, struct dt_object *dt,
2748                         struct lu_attr *attr)
2749 {
2750         struct osd_object *obj = osd_dt_obj(dt);
2751         int rc = 0;
2752
2753         if (unlikely(!dt_object_exists(dt)))
2754                 return -ENOENT;
2755         if (unlikely(obj->oo_destroyed))
2756                 return -ENOENT;
2757
2758         LASSERT(!dt_object_remote(dt));
2759         LINVRNT(osd_invariant(obj));
2760
2761         spin_lock(&obj->oo_guard);
2762         osd_inode_getattr(env, obj->oo_inode, attr);
2763         if (obj->oo_lma_flags & LUSTRE_ORPHAN_FL) {
2764                 attr->la_valid |= LA_FLAGS;
2765                 attr->la_flags |= LUSTRE_ORPHAN_FL;
2766         }
2767         if (obj->oo_lma_flags & LUSTRE_ENCRYPT_FL) {
2768                 attr->la_valid |= LA_FLAGS;
2769                 attr->la_flags |= LUSTRE_ENCRYPT_FL;
2770         }
2771         spin_unlock(&obj->oo_guard);
2772
2773         if (S_ISDIR(obj->oo_inode->i_mode) &&
2774             fid_is_namespace_visible(lu_object_fid(&dt->do_lu)))
2775                 rc = osd_dirent_count(env, dt, &attr->la_dirent_count);
2776
2777         return rc;
2778 }
2779
2780 static int osd_declare_attr_qid(const struct lu_env *env,
2781                                 struct osd_object *obj,
2782                                 struct osd_thandle *oh, long long bspace,
2783                                 qid_t old_id, qid_t new_id, bool enforce,
2784                                 unsigned int type, bool ignore_edquot)
2785 {
2786         int rc;
2787         struct osd_thread_info *info = osd_oti_get(env);
2788         struct lquota_id_info  *qi = &info->oti_qi;
2789
2790         qi->lqi_type = type;
2791         /* inode accounting */
2792         qi->lqi_is_blk = false;
2793
2794         /* one more inode for the new id ... */
2795         qi->lqi_id.qid_uid = new_id;
2796         qi->lqi_space      = 1;
2797         /* Reserve credits for the new id */
2798         rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
2799         if (ignore_edquot && (rc == -EDQUOT || rc == -EINPROGRESS))
2800                 rc = 0;
2801         if (rc)
2802                 RETURN(rc);
2803
2804         /* and one less inode for the current id */
2805         qi->lqi_id.qid_uid = old_id;
2806         qi->lqi_space = -1;
2807         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2808         if (ignore_edquot && (rc == -EDQUOT || rc == -EINPROGRESS))
2809                 rc = 0;
2810         if (rc)
2811                 RETURN(rc);
2812
2813         /* block accounting */
2814         qi->lqi_is_blk = true;
2815
2816         /* more blocks for the new id ... */
2817         qi->lqi_id.qid_uid = new_id;
2818         qi->lqi_space      = bspace;
2819         /*
2820          * Credits for the new uid has been reserved, re-use "obj"
2821          * to save credit reservation.
2822          */
2823         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2824         if (ignore_edquot && (rc == -EDQUOT || rc == -EINPROGRESS))
2825                 rc = 0;
2826         if (rc)
2827                 RETURN(rc);
2828
2829         /* and finally less blocks for the current uid */
2830         qi->lqi_id.qid_uid = old_id;
2831         qi->lqi_space      = -bspace;
2832         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2833         if (ignore_edquot && (rc == -EDQUOT || rc == -EINPROGRESS))
2834                 rc = 0;
2835
2836         RETURN(rc);
2837 }
2838
2839 static int osd_declare_attr_set(const struct lu_env *env,
2840                                 struct dt_object *dt,
2841                                 const struct lu_attr *attr,
2842                                 struct thandle *handle)
2843 {
2844         struct osd_thandle *oh;
2845         struct osd_object *obj;
2846         qid_t uid;
2847         qid_t gid;
2848         long long bspace;
2849         int rc = 0;
2850         bool enforce;
2851
2852         ENTRY;
2853
2854         LASSERT(dt != NULL);
2855         LASSERT(handle != NULL);
2856
2857         obj = osd_dt_obj(dt);
2858         LASSERT(osd_invariant(obj));
2859
2860         oh = container_of(handle, struct osd_thandle, ot_super);
2861         LASSERT(oh->ot_handle == NULL);
2862
2863         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
2864                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2865
2866         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
2867                              osd_dto_credits_noquota[DTO_XATTR_SET]);
2868
2869         if (attr == NULL || obj->oo_inode == NULL)
2870                 RETURN(rc);
2871
2872         bspace   = obj->oo_inode->i_blocks << 9;
2873         bspace   = toqb(bspace);
2874
2875         /*
2876          * Changing ownership is always preformed by super user, it should not
2877          * fail with EDQUOT unless required explicitly.
2878          *
2879          * We still need to call the osd_declare_qid() to calculate the journal
2880          * credits for updating quota accounting files and to trigger quota
2881          * space adjustment once the operation is completed.
2882          */
2883         if (attr->la_valid & LA_UID || attr->la_valid & LA_GID) {
2884                 bool ignore_edquot = !(attr->la_flags & LUSTRE_SET_SYNC_FL);
2885
2886                 if (!ignore_edquot)
2887                         CDEBUG(D_QUOTA,
2888                                "%s: enforce quota on UID %u, GID %u (quota space is %lld)\n",
2889                                osd_ino2name(obj->oo_inode), attr->la_uid,
2890                                attr->la_gid, bspace);
2891
2892                 /* USERQUOTA */
2893                 uid = i_uid_read(obj->oo_inode);
2894                 enforce = (attr->la_valid & LA_UID) && (attr->la_uid != uid);
2895                 rc = osd_declare_attr_qid(env, obj, oh, bspace, uid,
2896                                           attr->la_uid, enforce, USRQUOTA,
2897                                           true);
2898                 if (rc)
2899                         RETURN(rc);
2900
2901                 gid = i_gid_read(obj->oo_inode);
2902                 CDEBUG(D_QUOTA, "declare uid %d -> %d gid %d -> %d\n", uid,
2903                        attr->la_uid, gid, attr->la_gid);
2904                 enforce = (attr->la_valid & LA_GID) && (attr->la_gid != gid);
2905                 rc = osd_declare_attr_qid(env, obj, oh, bspace, gid,
2906                                           attr->la_gid, enforce, GRPQUOTA,
2907                                           ignore_edquot);
2908                 if (rc)
2909                         RETURN(rc);
2910
2911         }
2912 #ifdef HAVE_PROJECT_QUOTA
2913         if (attr->la_valid & LA_PROJID) {
2914                 __u32 projid = i_projid_read(obj->oo_inode);
2915
2916                 enforce = (attr->la_valid & LA_PROJID) &&
2917                                         (attr->la_projid != projid);
2918                 rc = osd_declare_attr_qid(env, obj, oh, bspace,
2919                                           (qid_t)projid, (qid_t)attr->la_projid,
2920                                           enforce, PRJQUOTA, true);
2921                 if (rc)
2922                         RETURN(rc);
2923         }
2924 #endif
2925         RETURN(rc);
2926 }
2927
2928 static int osd_inode_setattr(const struct lu_env *env,
2929                              struct inode *inode, const struct lu_attr *attr)
2930 {
2931         __u64 bits = attr->la_valid;
2932
2933         /* Only allow set size for regular file */
2934         if (!S_ISREG(inode->i_mode))
2935                 bits &= ~(LA_SIZE | LA_BLOCKS);
2936
2937         if (bits == 0)
2938                 return 0;
2939
2940         if (bits & LA_ATIME)
2941                 inode->i_atime = osd_inode_time(inode, attr->la_atime);
2942         if (bits & LA_CTIME)
2943                 inode->i_ctime = osd_inode_time(inode, attr->la_ctime);
2944         if (bits & LA_MTIME)
2945                 inode->i_mtime = osd_inode_time(inode, attr->la_mtime);
2946         if (bits & LA_SIZE) {
2947                 spin_lock(&inode->i_lock);
2948                 LDISKFS_I(inode)->i_disksize = attr->la_size;
2949                 i_size_write(inode, attr->la_size);
2950                 spin_unlock(&inode->i_lock);
2951         }
2952
2953         /*
2954          * OSD should not change "i_blocks" which is used by quota.
2955          * "i_blocks" should be changed by ldiskfs only.
2956          */
2957         if (bits & LA_MODE)
2958                 inode->i_mode = (inode->i_mode & S_IFMT) |
2959                                 (attr->la_mode & ~S_IFMT);
2960         if (bits & LA_UID)
2961                 i_uid_write(inode, attr->la_uid);
2962         if (bits & LA_GID)
2963                 i_gid_write(inode, attr->la_gid);
2964         if (bits & LA_PROJID)
2965                 i_projid_write(inode, attr->la_projid);
2966         if (bits & LA_NLINK)
2967                 set_nlink(inode, attr->la_nlink);
2968         if (bits & LA_RDEV)
2969                 inode->i_rdev = attr->la_rdev;
2970
2971         if (bits & LA_FLAGS) {
2972                 /* always keep S_NOCMTIME */
2973                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
2974                                  S_NOCMTIME;
2975 #if defined(S_ENCRYPTED)
2976                 /* Always remove S_ENCRYPTED, because ldiskfs must not be
2977                  * aware of encryption status. It is just stored into LMA
2978                  * so that it can be forwared to client side.
2979                  */
2980                 inode->i_flags &= ~S_ENCRYPTED;
2981 #endif
2982                 /*
2983                  * Ext4 did not transfer inherit flags from
2984                  * @inode->i_flags to raw inode i_flags when writing
2985                  * flags, we do it explictly here.
2986                  */
2987                 if (attr->la_flags & LUSTRE_PROJINHERIT_FL)
2988                         LDISKFS_I(inode)->i_flags |= LUSTRE_PROJINHERIT_FL;
2989                 else
2990                         LDISKFS_I(inode)->i_flags &= ~LUSTRE_PROJINHERIT_FL;
2991         }
2992         return 0;
2993 }
2994
2995 #ifdef HAVE_PROJECT_QUOTA
2996 static int osd_transfer_project(struct inode *inode, __u32 projid,
2997                                 struct thandle *handle)
2998 {
2999         struct super_block *sb = inode->i_sb;
3000         struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
3001         int err;
3002         kprojid_t kprojid;
3003         struct ldiskfs_iloc iloc;
3004         struct ldiskfs_inode *raw_inode;
3005         struct dquot *transfer_to[LDISKFS_MAXQUOTAS] = { };
3006
3007         if (!ldiskfs_has_feature_project(sb)) {
3008                 LASSERT(__kprojid_val(LDISKFS_I(inode)->i_projid)
3009                         == LDISKFS_DEF_PROJID);
3010                 if (projid != LDISKFS_DEF_PROJID)
3011                         return -EOPNOTSUPP;
3012                 else
3013                         return 0;
3014         }
3015
3016         if (LDISKFS_INODE_SIZE(sb) <= LDISKFS_GOOD_OLD_INODE_SIZE)
3017                 return -EOPNOTSUPP;
3018
3019         kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
3020         if (projid_eq(kprojid, LDISKFS_I(inode)->i_projid))
3021                 return 0;
3022
3023         err = ldiskfs_get_inode_loc(inode, &iloc);
3024         if (err)
3025                 return err;
3026
3027         raw_inode = ldiskfs_raw_inode(&iloc);
3028         if (!LDISKFS_FITS_IN_INODE(raw_inode, ei, i_projid)) {
3029                 struct osd_thandle *oh = container_of(handle,
3030                                                       struct osd_thandle,
3031                                                       ot_super);
3032                 /**
3033                  * try to expand inode size automatically.
3034                  */
3035                 ldiskfs_mark_inode_dirty(oh->ot_handle, inode);
3036                 if (!LDISKFS_FITS_IN_INODE(raw_inode, ei, i_projid)) {
3037                         err = -EOVERFLOW;
3038                         brelse(iloc.bh);
3039                         return err;
3040                 }
3041         }
3042         brelse(iloc.bh);
3043
3044         dquot_initialize(inode);
3045         transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
3046         if (transfer_to[PRJQUOTA]) {
3047                 err = __dquot_transfer(inode, transfer_to);
3048                 dqput(transfer_to[PRJQUOTA]);
3049                 if (err)
3050                         return err;
3051         }
3052
3053         return err;
3054 }
3055 #endif
3056
3057 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr,
3058                               struct thandle *handle)
3059 {
3060         int rc;
3061
3062         if ((attr->la_valid & LA_UID && attr->la_uid != i_uid_read(inode)) ||
3063             (attr->la_valid & LA_GID && attr->la_gid != i_gid_read(inode))) {
3064                 struct iattr iattr;
3065
3066                 CDEBUG(D_QUOTA,
3067                        "executing dquot_transfer inode %ld uid %d -> %d gid %d -> %d\n",
3068                        inode->i_ino, i_uid_read(inode), attr->la_uid,
3069                        i_gid_read(inode), attr->la_gid);
3070
3071                 dquot_initialize(inode);
3072                 iattr.ia_valid = 0;
3073                 if (attr->la_valid & LA_UID)
3074                         iattr.ia_valid |= ATTR_UID;
3075                 if (attr->la_valid & LA_GID)
3076                         iattr.ia_valid |= ATTR_GID;
3077                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
3078                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
3079
3080                 rc = dquot_transfer(inode, &iattr);
3081                 if (rc) {
3082                         CERROR("%s: quota transfer failed. Is quota enforcement enabled on the ldiskfs filesystem? rc = %d\n",
3083                                osd_ino2name(inode), rc);
3084                         return rc;
3085                 }
3086         }
3087
3088         /* Handle project id transfer here properly */
3089         if (attr->la_valid & LA_PROJID &&
3090             attr->la_projid != i_projid_read(inode)) {
3091 #ifdef HAVE_PROJECT_QUOTA
3092                 rc = osd_transfer_project(inode, attr->la_projid, handle);
3093 #else
3094                 rc = -ENOTSUPP;
3095 #endif
3096                 if (rc) {
3097                         CERROR("%s: quota transfer failed. Is project enforcement enabled on the ldiskfs filesystem? rc = %d\n",
3098                                osd_ino2name(inode), rc);
3099                         return rc;
3100                 }
3101         }
3102         return 0;
3103 }
3104
3105 static int osd_attr_set(const struct lu_env *env,
3106                         struct dt_object *dt,
3107                         const struct lu_attr *attr,
3108                         struct thandle *handle)
3109 {
3110         struct osd_object *obj = osd_dt_obj(dt);
3111         struct inode *inode;
3112         int rc;
3113
3114         if (!dt_object_exists(dt))
3115                 return -ENOENT;
3116
3117         LASSERT(handle != NULL);
3118         LASSERT(!dt_object_remote(dt));
3119         LASSERT(osd_invariant(obj));
3120
3121         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
3122
3123         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING) &&
3124             !osd_obj2dev(obj)->od_is_ost) {
3125                 struct osd_thread_info *oti = osd_oti_get(env);
3126                 const struct lu_fid *fid0 = lu_object_fid(&dt->do_lu);
3127                 struct lu_fid *fid1 = &oti->oti_fid;
3128                 struct osd_inode_id *id = &oti->oti_id;
3129                 struct iam_path_descr *ipd;
3130                 struct iam_container *bag;
3131                 struct osd_thandle *oh;
3132                 int rc;
3133
3134                 fid_cpu_to_be(fid1, fid0);
3135                 memset(id, 1, sizeof(*id));
3136                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
3137                                   fid0)->oi_dir.od_container;
3138                 ipd = osd_idx_ipd_get(env, bag);
3139                 if (unlikely(ipd == NULL))
3140                         RETURN(-ENOMEM);
3141
3142                 oh = container_of(handle, struct osd_thandle, ot_super);
3143                 rc = iam_update(oh->ot_handle, bag,
3144                                 (const struct iam_key *)fid1,
3145                                 (const struct iam_rec *)id, ipd);
3146                 osd_ipd_put(env, bag, ipd);
3147                 return(rc > 0 ? 0 : rc);
3148         }
3149
3150         inode = obj->oo_inode;
3151
3152         rc = osd_quota_transfer(inode, attr, handle);
3153         if (rc)
3154                 return rc;
3155
3156         spin_lock(&obj->oo_guard);
3157         rc = osd_inode_setattr(env, inode, attr);
3158         spin_unlock(&obj->oo_guard);
3159         if (rc != 0)
3160                 GOTO(out, rc);
3161
3162         osd_dirty_inode(inode, I_DIRTY_DATASYNC);
3163
3164         osd_trans_exec_check(env, handle, OSD_OT_ATTR_SET);
3165
3166         if (!(attr->la_valid & LA_FLAGS))
3167                 GOTO(out, rc);
3168
3169         /* Let's check if there are extra flags need to be set into LMA */
3170         if (attr->la_flags & LUSTRE_LMA_FL_MASKS) {
3171                 struct osd_thread_info *info = osd_oti_get(env);
3172                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
3173
3174                 LASSERT(!obj->oo_pfid_in_lma);
3175
3176                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
3177                                  &info->oti_ost_attrs);
3178                 if (rc)
3179                         GOTO(out, rc);
3180
3181                 lma->lma_incompat |=
3182                         lustre_to_lma_flags(attr->la_flags);
3183                 lustre_lma_swab(lma);
3184
3185                 osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
3186
3187                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA,
3188                                      lma, sizeof(*lma), XATTR_REPLACE);
3189                 if (rc != 0) {
3190                         struct osd_device *osd = osd_obj2dev(obj);
3191
3192                         CWARN("%s: set "DFID" lma flags %u failed: rc = %d\n",
3193                               osd_name(osd), PFID(lu_object_fid(&dt->do_lu)),
3194                               lma->lma_incompat, rc);
3195                 } else {
3196                         obj->oo_lma_flags =
3197                                 attr->la_flags & LUSTRE_LMA_FL_MASKS;
3198                 }
3199                 osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
3200         }
3201 out:
3202
3203         return rc;
3204 }
3205
3206 static struct dentry *osd_child_dentry_get(const struct lu_env *env,
3207                                            struct osd_object *obj,
3208                                            const char *name, const int namelen)
3209 {
3210         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
3211 }
3212
3213 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
3214                       umode_t mode, struct dt_allocation_hint *hint,
3215                       struct thandle *th, struct lu_attr *attr)
3216 {
3217         int result;
3218         struct osd_device *osd = osd_obj2dev(obj);
3219         struct osd_thandle *oth;
3220         struct dt_object *parent = NULL;
3221         struct inode *inode;
3222         uid_t owner[2] = {0, 0};
3223
3224         if (attr->la_valid & LA_UID)
3225                 owner[0] = attr->la_uid;
3226         if (attr->la_valid & LA_GID)
3227                 owner[1] = attr->la_gid;
3228
3229         LINVRNT(osd_invariant(obj));
3230         LASSERT(obj->oo_inode == NULL);
3231         LASSERT(obj->oo_hl_head == NULL);
3232
3233         if (S_ISDIR(mode) && ldiskfs_pdo) {
3234                 obj->oo_hl_head =
3235                         ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
3236                 if (obj->oo_hl_head == NULL)
3237                         return -ENOMEM;
3238         }
3239
3240         oth = container_of(th, struct osd_thandle, ot_super);
3241         LASSERT(oth->ot_handle->h_transaction != NULL);
3242
3243         if (hint != NULL && hint->dah_parent != NULL &&
3244             !dt_object_remote(hint->dah_parent))
3245                 parent = hint->dah_parent;
3246
3247         inode = ldiskfs_create_inode(oth->ot_handle,
3248                                      parent ? osd_dt_obj(parent)->oo_inode :
3249                                               osd_sb(osd)->s_root->d_inode,
3250                                      mode, owner);
3251         if (!IS_ERR(inode)) {
3252                 /* Do not update file c/mtime in ldiskfs. */
3253                 inode->i_flags |= S_NOCMTIME;
3254
3255                 /*
3256                  * For new created object, it must be consistent,
3257                  * and it is unnecessary to scrub against it.
3258                  */
3259                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
3260
3261                 obj->oo_inode = inode;
3262                 result = 0;
3263         } else {
3264                 if (obj->oo_hl_head != NULL) {
3265                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
3266                         obj->oo_hl_head = NULL;
3267                 }
3268                 result = PTR_ERR(inode);
3269         }
3270         LINVRNT(osd_invariant(obj));
3271         return result;
3272 }
3273
3274 enum {
3275         OSD_NAME_LEN = 255
3276 };
3277
3278 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
3279                      struct lu_attr *attr,
3280                      struct dt_allocation_hint *hint,
3281                      struct dt_object_format *dof,
3282                      struct thandle *th)
3283 {
3284         int result;
3285         struct osd_thandle *oth;
3286         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX | S_ISGID));
3287
3288         LASSERT(S_ISDIR(attr->la_mode));
3289
3290         oth = container_of(th, struct osd_thandle, ot_super);
3291         LASSERT(oth->ot_handle->h_transaction != NULL);
3292         if (fid_is_namespace_visible(lu_object_fid(&obj->oo_dt.do_lu)))
3293                 obj->oo_dirent_count = 0;
3294         result = osd_mkfile(info, obj, mode, hint, th, attr);
3295
3296         return result;
3297 }
3298
3299 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
3300                         struct lu_attr *attr,
3301                         struct dt_allocation_hint *hint,
3302                         struct dt_object_format *dof,
3303                         struct thandle *th)
3304 {
3305         int result;
3306         struct osd_thandle *oth;
3307         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
3308
3309         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
3310
3311         LASSERT(S_ISREG(attr->la_mode));
3312
3313         oth = container_of(th, struct osd_thandle, ot_super);
3314         LASSERT(oth->ot_handle->h_transaction != NULL);
3315
3316         result = osd_mkfile(info, obj, mode, hint, th, attr);
3317         if (result == 0) {
3318                 LASSERT(obj->oo_inode != NULL);
3319                 if (feat->dif_flags & DT_IND_VARKEY)
3320                         result = iam_lvar_create(obj->oo_inode,
3321                                                  feat->dif_keysize_max,
3322                                                  feat->dif_ptrsize,
3323                                                  feat->dif_recsize_max,
3324                                                  oth->ot_handle);
3325                 else
3326                         result = iam_lfix_create(obj->oo_inode,
3327                                                  feat->dif_keysize_max,
3328                                                  feat->dif_ptrsize,
3329                                                  feat->dif_recsize_max,
3330                                                  oth->ot_handle);
3331         }
3332         return result;
3333 }
3334
3335 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
3336                      struct lu_attr *attr,
3337                      struct dt_allocation_hint *hint,
3338                      struct dt_object_format *dof,
3339                      struct thandle *th)
3340 {
3341         LASSERT(S_ISREG(attr->la_mode));
3342         return osd_mkfile(info, obj, (attr->la_mode &
3343                          (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th,
3344                           attr);
3345 }
3346
3347 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
3348                      struct lu_attr *attr,
3349                      struct dt_allocation_hint *hint,
3350                      struct dt_object_format *dof,
3351                      struct thandle *th)
3352 {
3353         LASSERT(S_ISLNK(attr->la_mode));
3354         return osd_mkfile(info, obj, (attr->la_mode &
3355                          (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th,
3356                           attr);
3357 }
3358
3359 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
3360                      struct lu_attr *attr,
3361                      struct dt_allocation_hint *hint,
3362                      struct dt_object_format *dof,
3363                      struct thandle *th)
3364 {
3365         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
3366         int result;
3367
3368         LINVRNT(osd_invariant(obj));
3369         LASSERT(obj->oo_inode == NULL);
3370         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
3371                 S_ISFIFO(mode) || S_ISSOCK(mode));
3372
3373         result = osd_mkfile(info, obj, mode, hint, th, attr);
3374         if (result == 0) {
3375                 LASSERT(obj->oo_inode != NULL);
3376                 /*
3377                  * This inode should be marked dirty for i_rdev.  Currently
3378                  * that is done in the osd_attr_init().
3379                  */
3380                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
3381                                    attr->la_rdev);
3382         }
3383         LINVRNT(osd_invariant(obj));
3384         return result;
3385 }
3386
3387 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
3388                               struct lu_attr *,
3389                               struct dt_allocation_hint *hint,
3390                               struct dt_object_format *dof,
3391                               struct thandle *);
3392
3393 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
3394 {
3395         osd_obj_type_f result;
3396
3397         switch (type) {
3398         case DFT_DIR:
3399                 result = osd_mkdir;
3400                 break;
3401         case DFT_REGULAR:
3402                 result = osd_mkreg;
3403                 break;
3404         case DFT_SYM:
3405                 result = osd_mksym;
3406                 break;
3407         case DFT_NODE:
3408                 result = osd_mknod;
3409                 break;
3410         case DFT_INDEX:
3411                 result = osd_mk_index;
3412                 break;
3413
3414         default:
3415                 LBUG();
3416                 break;
3417         }
3418         return result;
3419 }
3420
3421
3422 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
3423                         struct dt_object *parent, struct dt_object *child,
3424                         umode_t child_mode)
3425 {
3426         LASSERT(ah);
3427
3428         ah->dah_parent = parent;
3429         ah->dah_mode = child_mode;
3430
3431         if (parent != NULL && !dt_object_remote(parent)) {
3432                 /* will help to find FID->ino at dt_insert("..") */
3433                 struct osd_object *pobj = osd_dt_obj(parent);
3434
3435                 osd_idc_find_and_init(env, osd_obj2dev(pobj), pobj);
3436         }
3437 }
3438
3439 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
3440                           struct lu_attr *attr, struct dt_object_format *dof,
3441                           struct thandle *handle)
3442 {
3443         struct inode *inode = obj->oo_inode;
3444         __u64 valid = attr->la_valid;
3445         int result;
3446
3447         attr->la_valid &= ~(LA_TYPE | LA_MODE);
3448
3449         if (dof->dof_type != DFT_NODE)
3450                 attr->la_valid &= ~LA_RDEV;
3451         if ((valid & LA_ATIME) && (attr->la_atime == inode->i_atime.tv_sec))
3452                 attr->la_valid &= ~LA_ATIME;
3453         if ((valid & LA_CTIME) && (attr->la_ctime == inode->i_ctime.tv_sec))
3454                 attr->la_valid &= ~LA_CTIME;
3455         if ((valid & LA_MTIME) && (attr->la_mtime == inode->i_mtime.tv_sec))
3456                 attr->la_valid &= ~LA_MTIME;
3457
3458         result = osd_quota_transfer(inode, attr, handle);
3459         if (result)
3460                 return;
3461
3462         if (attr->la_valid != 0) {
3463                 result = osd_inode_setattr(info->oti_env, inode, attr);
3464                 /*
3465                  * The osd_inode_setattr() should always succeed here.  The
3466                  * only error that could be returned is EDQUOT when we are
3467                  * trying to change the UID or GID of the inode. However, this
3468                  * should not happen since quota enforcement is no longer
3469                  * enabled on ldiskfs (lquota takes care of it).
3470                  */
3471                 LASSERTF(result == 0, "%d\n", result);
3472                 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
3473         }
3474
3475         attr->la_valid = valid;
3476 }
3477
3478 /**
3479  * Helper function for osd_create()
3480  *
3481  * \retval 0, on success
3482  */
3483 static int __osd_create(struct osd_thread_info *info, struct osd_object *obj,
3484                         struct lu_attr *attr, struct dt_allocation_hint *hint,
3485                         struct dt_object_format *dof, struct thandle *th)
3486 {
3487         int result;
3488         __u32 umask;
3489
3490         osd_trans_exec_op(info->oti_env, th, OSD_OT_CREATE);
3491
3492         /* we drop umask so that permissions we pass are not affected */
3493         umask = current->fs->umask;
3494         current->fs->umask = 0;
3495
3496         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
3497                                                   th);
3498         if (likely(obj->oo_inode != NULL)) {
3499                 LASSERT(obj->oo_inode->i_state & I_NEW);
3500
3501                 /*
3502                  * Unlock the inode before attr initialization to avoid
3503                  * unnecessary dqget operations. LU-6378
3504                  */
3505                 unlock_new_inode(obj->oo_inode);
3506         }
3507
3508         if (likely(result == 0)) {
3509                 osd_attr_init(info, obj, attr, dof, th);
3510                 osd_object_init0(obj);
3511         }
3512
3513         /* restore previous umask value */
3514         current->fs->umask = umask;
3515
3516         osd_trans_exec_check(info->oti_env, th, OSD_OT_CREATE);
3517
3518         return result;
3519 }
3520
3521 /**
3522  * Helper function for osd_create()
3523  *
3524  * \retval 0, on success
3525  */
3526 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
3527                            const struct lu_fid *fid, struct thandle *th)
3528 {
3529         struct osd_thread_info *info = osd_oti_get(env);
3530         struct osd_inode_id    *id   = &info->oti_id;
3531         struct osd_device      *osd  = osd_obj2dev(obj);
3532         struct osd_thandle     *oh;
3533         int rc;
3534
3535         LASSERT(obj->oo_inode != NULL);
3536
3537         oh = container_of(th, struct osd_thandle, ot_super);
3538         LASSERT(oh->ot_handle);
3539         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3540
3541         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
3542         rc = osd_oi_insert(info, osd, fid, id, oh->ot_handle,
3543                            OI_CHECK_FLD, NULL);
3544         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_DUPLICATE_MAP) && osd->od_is_ost) {
3545                 struct lu_fid next_fid = *fid;
3546
3547                 /* insert next object in advance, and map to the same inode */
3548                 next_fid.f_oid++;
3549                 if (next_fid.f_oid != 0) {
3550                         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3551                         osd_oi_insert(info, osd, &next_fid, id, oh->ot_handle,
3552                                       OI_CHECK_FLD, NULL);
3553                         osd_trans_exec_check(env, th, OSD_OT_INSERT);
3554                 }
3555         }
3556
3557         osd_trans_exec_check(env, th, OSD_OT_INSERT);
3558
3559         return rc;
3560 }
3561
3562 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
3563                    u64 seq, struct lu_seq_range *range)
3564 {
3565         struct seq_server_site *ss = osd_seq_site(osd);
3566
3567         if (fid_seq_is_idif(seq)) {
3568                 fld_range_set_ost(range);
3569                 range->lsr_index = idif_ost_idx(seq);
3570                 return 0;
3571         }
3572
3573         if (!fid_seq_in_fldb(seq)) {
3574                 fld_range_set_mdt(range);
3575                 if (ss != NULL)
3576                         /*
3577                          * FIXME: If ss is NULL, it suppose not get lsr_index
3578                          * at all
3579                          */
3580                         range->lsr_index = ss->ss_node_id;
3581                 return 0;
3582         }
3583
3584         LASSERT(ss != NULL);
3585         fld_range_set_any(range);
3586         /* OSD will only do local fld lookup */
3587         return fld_local_lookup(env, ss->ss_server_fld, seq, range);
3588 }
3589
3590 static int osd_declare_create(const struct lu_env *env, struct dt_object *dt,
3591                               struct lu_attr *attr,
3592                               struct dt_allocation_hint *hint,
3593                               struct dt_object_format *dof,
3594                               struct thandle *handle)
3595 {
3596         struct osd_thandle *oh;
3597         int rc;
3598
3599         ENTRY;
3600
3601         LASSERT(handle != NULL);
3602
3603         oh = container_of(handle, struct osd_thandle, ot_super);
3604         LASSERT(oh->ot_handle == NULL);
3605
3606         /*
3607          * EA object consumes more credits than regular object: osd_mk_index
3608          * vs. osd_mkreg: osd_mk_index will create 2 blocks for root_node and
3609          * leaf_node, could involves the block, block bitmap, groups, GDT
3610          * change for each block, so add 4 * 2 credits in that case.
3611          */
3612         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
3613                              osd_dto_credits_noquota[DTO_OBJECT_CREATE] +
3614                              (dof->dof_type == DFT_INDEX) ? 4 * 2 : 0);
3615         /*
3616          * Reuse idle OI block may cause additional one OI block
3617          * to be changed.
3618          */
3619         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3620                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
3621         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_DUPLICATE_MAP))
3622                 osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3623                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
3624
3625         /* will help to find FID->ino mapping at dt_insert() */
3626         rc = osd_idc_find_and_init(env, osd_obj2dev(osd_dt_obj(dt)),
3627                                    osd_dt_obj(dt));
3628         if (rc != 0)
3629                 RETURN(rc);
3630
3631         if (!attr)
3632                 RETURN(0);
3633
3634         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid,
3635                                    attr->la_projid, 1, oh, osd_dt_obj(dt),
3636                                    NULL, OSD_QID_INODE);
3637         if (rc != 0)
3638                 RETURN(rc);
3639
3640         RETURN(rc);
3641 }
3642
3643 /**
3644  * Called to destroy on-disk representation of the object
3645  *
3646  * Concurrency: must be locked
3647  */
3648 static int osd_declare_destroy(const struct lu_env *env, struct dt_object *dt,
3649                                struct thandle *th)
3650 {
3651         struct osd_object *obj = osd_dt_obj(dt);
3652         struct inode *inode = obj->oo_inode;
3653         struct osd_thandle *oh;
3654         int rc;
3655
3656         ENTRY;
3657
3658         if (inode == NULL)
3659                 RETURN(-ENOENT);
3660
3661         oh = container_of(th, struct osd_thandle, ot_super);
3662         LASSERT(oh->ot_handle == NULL);
3663
3664         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
3665                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
3666
3667         /* For removing agent entry */
3668         if (lu_object_has_agent_entry(&obj->oo_dt.do_lu))
3669                 oh->ot_credits += osd_dto_credits_noquota[DTO_INDEX_DELETE];
3670
3671         /*
3672          * Recycle idle OI leaf may cause additional three OI blocks
3673          * to be changed.
3674          */
3675         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3676                 osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3677                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
3678         /* one less inode */
3679         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3680                                    i_projid_read(inode), -1, oh, obj, NULL,
3681                                    OSD_QID_INODE);
3682         if (rc)
3683                 RETURN(rc);
3684         /* data to be truncated */
3685         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3686                                    i_projid_read(inode), 0, oh, obj, NULL,
3687                                    OSD_QID_BLK);
3688         if (rc)
3689                 RETURN(rc);
3690
3691         /*
3692          * will help to find FID->ino when this object is being
3693          * added to PENDING
3694          */
3695         rc = osd_idc_find_and_init(env, osd_obj2dev(obj), obj);
3696
3697         RETURN(rc);
3698 }
3699
3700 static int osd_destroy(const struct lu_env *env, struct dt_object *dt,
3701                        struct thandle *th)
3702 {
3703         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
3704         struct osd_object *obj = osd_dt_obj(dt);
3705         struct inode *inode = obj->oo_inode;
3706         struct osd_device *osd = osd_obj2dev(obj);
3707         struct osd_thandle *oh;
3708         int result;
3709
3710         ENTRY;
3711
3712         oh = container_of(th, struct osd_thandle, ot_super);
3713         LASSERT(oh->ot_handle);
3714         LASSERT(inode);
3715         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
3716
3717         if (unlikely(fid_is_acct(fid)))
3718                 RETURN(-EPERM);
3719
3720         if (lu_object_has_agent_entry(&obj->oo_dt.do_lu)) {
3721                 result = osd_delete_from_remote_parent(env, osd, obj, oh, true);
3722                 if (result != 0)
3723                         CERROR("%s: remove agent entry "DFID": rc = %d\n",
3724                                osd_name(osd), PFID(fid), result);
3725         }
3726
3727         if (S_ISDIR(inode->i_mode)) {
3728                 if (inode->i_nlink > 2)
3729                         CERROR("%s: directory "DFID" ino %lu link count is %u at unlink. run e2fsck to repair\n",
3730                                osd_name(osd), PFID(fid), inode->i_ino,
3731                                inode->i_nlink);
3732
3733                 spin_lock(&obj->oo_guard);
3734                 clear_nlink(inode);
3735                 spin_unlock(&obj->oo_guard);
3736                 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
3737         }
3738
3739         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
3740
3741         ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
3742
3743         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3744                 result = osd_oi_delete(osd_oti_get(env), osd, fid,
3745                                        oh->ot_handle, OI_CHECK_FLD);
3746
3747         osd_trans_exec_check(env, th, OSD_OT_DESTROY);
3748         /* XXX: add to ext3 orphan list */
3749         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
3750
3751         /* not needed in the cache anymore */
3752         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
3753         obj->oo_destroyed = 1;
3754
3755         RETURN(0);
3756 }
3757
3758 /**
3759  * Put the fid into lustre_mdt_attrs, and then place the structure
3760  * inode's ea. This fid should not be altered during the life time
3761  * of the inode.
3762  *
3763  * \retval +ve, on success
3764  * \retval -ve, on error
3765  *
3766  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
3767  */
3768 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
3769                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
3770 {
3771         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
3772         struct lustre_mdt_attrs *lma = &loa->loa_lma;
3773         int rc;
3774
3775         ENTRY;
3776
3777         if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
3778                 RETURN(0);
3779
3780         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_OST_EA_FID_SET))
3781                 rc = -ENOMEM;
3782
3783         lustre_loa_init(loa, fid, compat, incompat);
3784         lustre_loa_swab(loa, false);
3785
3786         /*
3787          * For the OST device with 256 bytes inode size by default,
3788          * the PFID EA will be stored together with LMA EA to avoid
3789          * performance trouble. Otherwise the PFID EA can be stored
3790          * independently. LU-8998
3791          */
3792         if ((compat & LMAC_FID_ON_OST) &&
3793             LDISKFS_INODE_SIZE(inode->i_sb) <= 256)
3794                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
3795                                      sizeof(*loa), XATTR_CREATE);
3796         else
3797                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3798                                      sizeof(*lma), XATTR_CREATE);
3799         /*
3800          * LMA may already exist, but we need to check that all the
3801          * desired compat/incompat flags have been added.
3802          */
3803         if (unlikely(rc == -EEXIST)) {
3804                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
3805                                      XATTR_NAME_LMA, (void *)loa, sizeof(*loa));
3806                 if (rc < 0)
3807                         RETURN(rc);
3808
3809                 if (rc < sizeof(*lma))
3810                         RETURN(-EINVAL);
3811
3812                 lustre_loa_swab(loa, true);
3813                 if (lu_fid_eq(fid, &lma->lma_self_fid) &&
3814                     ((compat == 0 && incompat == 0) ||
3815                      (!(~lma->lma_compat & compat) &&
3816                       !(~lma->lma_incompat & incompat))))
3817                         RETURN(0);
3818
3819                 lma->lma_self_fid = *fid;
3820                 lma->lma_compat |= compat;
3821                 lma->lma_incompat |= incompat;
3822                 if (rc == sizeof(*lma)) {
3823                         lustre_lma_swab(lma);
3824                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3825                                              sizeof(*lma), XATTR_REPLACE);
3826                 } else {
3827                         lustre_loa_swab(loa, false);
3828                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
3829                                              sizeof(*loa), XATTR_REPLACE);
3830                 }
3831         }
3832
3833         RETURN(rc);
3834 }
3835
3836 /**
3837  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
3838  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
3839  * To have compatilibility with 1.8 ldiskfs driver we need to have
3840  * magic number at start of fid data.
3841  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
3842  * its inmemory API.
3843  */
3844 static void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
3845                                          const struct lu_fid *fid)
3846 {
3847         if (!fid_is_namespace_visible(fid) ||
3848             OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
3849                 param->edp_magic = 0;
3850                 return;
3851         }
3852
3853         param->edp_magic = LDISKFS_LUFID_MAGIC;
3854         param->edp_len =  sizeof(struct lu_fid) + 1;
3855         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
3856 }
3857
3858 /**
3859  * Try to read the fid from inode ea into dt_rec.
3860  *
3861  * \param fid object fid.
3862  *
3863  * \retval 0 on success
3864  */
3865 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
3866                           __u32 ino, struct lu_fid *fid,
3867                           struct osd_inode_id *id)
3868 {
3869         struct osd_thread_info *info  = osd_oti_get(env);
3870         struct inode *inode;
3871
3872         ENTRY;
3873
3874         osd_id_gen(id, ino, OSD_OII_NOGEN);
3875         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
3876         if (IS_ERR(inode))
3877                 RETURN(PTR_ERR(inode));
3878
3879         iput(inode);
3880         RETURN(0);
3881 }
3882
3883 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
3884                                         struct inode *dir,
3885                                         struct inode *parent_dir,
3886                                         const struct lu_fid *dot_fid,
3887                                         const struct lu_fid *dot_dot_fid,
3888                                         struct osd_thandle *oth)
3889 {
3890         struct ldiskfs_dentry_param *dot_ldp;
3891         struct ldiskfs_dentry_param *dot_dot_ldp;
3892         __u32 saved_nlink = dir->i_nlink;
3893         int rc;
3894
3895         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
3896         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
3897
3898         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
3899         dot_ldp->edp_magic = 0;
3900
3901         rc = ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
3902                                     dir, dot_ldp, dot_dot_ldp);
3903         /*
3904          * The ldiskfs_add_dot_dotdot() may dir->i_nlink as 2, then
3905          * the subseqent ref_add() will increase the dir->i_nlink
3906          * as 3. That is incorrect for new created directory.
3907          *
3908          * It looks like hack, because we want to make the OSD API
3909          * to be order-independent for new created directory object
3910          * between dt_insert(..) and ref_add() operations.
3911          *
3912          * Here, we only restore the in-RAM dir-inode's nlink attr,
3913          * becuase if the nlink attr is not 2, then there will be
3914          * ref_add() called following the dt_insert(..), such call
3915          * will make both the in-RAM and on-disk dir-inode's nlink
3916          * attr to be set as 2. LU-7447
3917          */
3918         set_nlink(dir, saved_nlink);
3919         return rc;
3920 }
3921
3922 /**
3923  * Create an local agent inode for remote entry
3924  */
3925 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
3926                                                   struct osd_device *osd,
3927                                                   struct osd_object *pobj,
3928                                                   const struct lu_fid *fid,
3929                                                   __u32 type,
3930                                                   struct thandle *th)
3931 {
3932         struct osd_thread_info *info = osd_oti_get(env);
3933         struct inode *local;
3934         struct osd_thandle *oh;
3935         uid_t own[2] = {0, 0};
3936         int rc;
3937
3938         ENTRY;
3939
3940         LASSERT(th);
3941         oh = container_of(th, struct osd_thandle, ot_super);
3942         LASSERT(oh->ot_handle->h_transaction != NULL);
3943
3944         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode, type, own);
3945         if (IS_ERR(local)) {
3946                 CERROR("%s: create local error %d\n", osd_name(osd),
3947                        (int)PTR_ERR(local));
3948                 RETURN(local);
3949         }
3950
3951         /*
3952          * restore i_gid in case S_ISGID is set, we will inherit S_ISGID and set
3953          * correct gid on remote file, not agent here
3954          */
3955         local->i_gid = current_fsgid();
3956         ldiskfs_set_inode_state(local, LDISKFS_STATE_LUSTRE_NOSCRUB);
3957
3958         /* e2fsck doesn't like empty symlinks.  Store remote FID as symlink.
3959          * That gives e2fsck something to look at and be happy, and allows
3960          * debugging if we need to determine where this symlink came from.
3961          */
3962         if (S_ISLNK(type)) {
3963                 BUILD_BUG_ON(LDISKFS_N_BLOCKS * 4 < FID_LEN + 1);
3964                 rc = snprintf((char *)LDISKFS_I(local)->i_data,
3965                               LDISKFS_N_BLOCKS * 4, DFID, PFID(fid));
3966
3967                 i_size_write(local, rc);
3968                 LDISKFS_I(local)->i_disksize = rc;
3969         }
3970         unlock_new_inode(local);
3971
3972         /* Agent inode should not have project ID */
3973 #ifdef  HAVE_PROJECT_QUOTA
3974         if (LDISKFS_I(pobj->oo_inode)->i_flags & LUSTRE_PROJINHERIT_FL &&
3975             i_projid_read(pobj->oo_inode) != 0) {
3976                 rc = osd_transfer_project(local, 0, th);
3977                 if (rc) {
3978                         CERROR("%s: quota transfer failed:. Is project quota enforcement enabled on the ldiskfs filesystem? rc = %d\n",
3979                                osd_ino2name(local), rc);
3980                         RETURN(ERR_PTR(rc));
3981                 }
3982         }
3983 #endif
3984         /* Set special LMA flag for local agent inode */
3985         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
3986         if (rc != 0) {
3987                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
3988                        osd_name(osd), PFID(fid), rc);
3989                 RETURN(ERR_PTR(rc));
3990         }
3991
3992         if (!S_ISDIR(type))
3993                 RETURN(local);
3994
3995         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
3996                                          lu_object_fid(&pobj->oo_dt.do_lu),
3997                                          fid, oh);
3998         if (rc != 0) {
3999                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
4000                         osd_name(osd), PFID(fid), rc);
4001                 RETURN(ERR_PTR(rc));
4002         }
4003
4004         RETURN(local);
4005 }
4006
4007 /**
4008  * when direntry is deleted, we have to take care of possible agent inode
4009  * referenced by that. unfortunately we can't do this at that point:
4010  * iget() within a running transaction leads to deadlock and we better do
4011  * not call that every delete declaration to save performance. so we put
4012  * a potention agent inode on a list and process that once the transaction
4013  * is over. Notice it's not any worse in terms of real orphans as regular
4014  * object destroy doesn't put inodes on the on-disk orphan list. this should
4015  * be addressed separately
4016  */
4017 static int osd_schedule_agent_inode_removal(const struct lu_env *env,
4018                                             struct osd_thandle *oh,
4019                                             __u32 ino)
4020 {
4021         struct osd_device *osd = osd_dt_dev(oh->ot_super.th_dev);
4022         struct osd_obj_orphan *oor;
4023
4024         OBD_ALLOC_PTR(oor);
4025         if (oor == NULL)
4026                 return -ENOMEM;
4027
4028         oor->oor_ino = ino;
4029         oor->oor_env = (struct lu_env *)env;
4030         spin_lock(&osd->od_osfs_lock);
4031         list_add(&oor->oor_list, &osd->od_orphan_list);
4032         spin_unlock(&osd->od_osfs_lock);
4033
4034         oh->ot_remove_agents = 1;
4035
4036         return 0;
4037
4038 }
4039
4040 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
4041                                                 struct osd_device *osd)
4042 {
4043         struct osd_thread_info *info = osd_oti_get(env);
4044         struct osd_obj_orphan *oor, *tmp;
4045         struct osd_inode_id id;
4046         LIST_HEAD(list);
4047         struct inode *inode;
4048         struct lu_fid fid;
4049         handle_t *jh;
4050         __u32 ino;
4051
4052         spin_lock(&osd->od_osfs_lock);
4053         list_for_each_entry_safe(oor, tmp, &osd->od_orphan_list, oor_list) {
4054                 if (oor->oor_env == env)
4055                         list_move(&oor->oor_list, &list);
4056         }
4057         spin_unlock(&osd->od_osfs_lock);
4058
4059         list_for_each_entry_safe(oor, tmp, &list, oor_list) {
4060
4061                 ino = oor->oor_ino;
4062
4063                 list_del(&oor->oor_list);
4064                 OBD_FREE_PTR(oor);
4065
4066                 osd_id_gen(&id, ino, OSD_OII_NOGEN);
4067                 inode = osd_iget_fid(info, osd, &id, &fid);
4068                 if (IS_ERR(inode))
4069                         continue;
4070
4071                 if (!osd_remote_fid(env, osd, &fid)) {
4072                         iput(inode);
4073                         continue;
4074                 }
4075
4076                 jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC, 1);
4077                 clear_nlink(inode);
4078                 mark_inode_dirty(inode);
4079                 ldiskfs_journal_stop(jh);
4080                 iput(inode);
4081         }
4082
4083         return 0;
4084 }
4085
4086 /**
4087  * OSD layer object create function for OST objects (b=11826).
4088  *
4089  * The FID is inserted into inode xattr here.
4090  *
4091  * \retval   0, on success
4092  * \retval -ve, on error
4093  */
4094 static int osd_create(const struct lu_env *env, struct dt_object *dt,
4095                       struct lu_attr *attr, struct dt_allocation_hint *hint,
4096                       struct dt_object_format *dof, struct thandle *th)
4097 {
4098         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
4099         struct osd_object *obj = osd_dt_obj(dt);
4100         struct osd_thread_info *info = osd_oti_get(env);
4101         int result, on_ost = 0;
4102
4103         ENTRY;
4104
4105         if (dt_object_exists(dt))
4106                 RETURN(-EEXIST);
4107
4108         LINVRNT(osd_invariant(obj));
4109         LASSERT(!dt_object_remote(dt));
4110         LASSERT(osd_is_write_locked(env, obj));
4111         LASSERT(th != NULL);
4112
4113         if (unlikely(fid_is_acct(fid)))
4114                 /*
4115                  * Quota files can't be created from the kernel any more,
4116                  * 'tune2fs -O quota' will take care of creating them
4117                  */
4118                 RETURN(-EPERM);
4119
4120         result = __osd_create(info, obj, attr, hint, dof, th);
4121         if (result == 0) {
4122                 if (fid_is_idif(fid) &&
4123                     !osd_dev(dt->do_lu.lo_dev)->od_index_in_idif) {
4124                         struct lu_fid *tfid = &info->oti_fid;
4125                         struct ost_id *oi   = &info->oti_ostid;
4126
4127                         fid_to_ostid(fid, oi);
4128                         ostid_to_fid(tfid, oi, 0);
4129                         on_ost = 1;
4130                         result = osd_ea_fid_set(info, obj->oo_inode, tfid,
4131                                                 LMAC_FID_ON_OST, 0);
4132                 } else {
4133                         on_ost = fid_is_on_ost(info, osd_obj2dev(obj),
4134                                                fid, OI_CHECK_FLD);
4135                         result = osd_ea_fid_set(info, obj->oo_inode, fid,
4136                                                 on_ost ? LMAC_FID_ON_OST : 0,
4137                                                 0);
4138                 }
4139                 if (obj->oo_dt.do_body_ops == &osd_body_ops_new)
4140                         obj->oo_dt.do_body_ops = &osd_body_ops;
4141         }
4142
4143         if (!result && !CFS_FAIL_CHECK(OBD_FAIL_OSD_NO_OI_ENTRY))
4144                 result = __osd_oi_insert(env, obj, fid, th);
4145
4146         /*
4147          * a small optimization - dt_insert() isn't usually applied
4148          * to OST objects, so we don't need to cache OI mapping for
4149          * OST objects
4150          */
4151         if (result == 0 && on_ost == 0) {
4152                 struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
4153
4154                 result = osd_idc_find_and_init(env, osd, obj);
4155                 LASSERT(result == 0);
4156         }
4157
4158         LASSERT(ergo(result == 0,
4159                      dt_object_exists(dt) && !dt_object_remote(dt)));
4160         LINVRNT(osd_invariant(obj));
4161         RETURN(result);
4162 }
4163
4164 static int osd_declare_ref_add(const struct lu_env *env, struct dt_object *dt,
4165                                struct thandle *handle)
4166 {
4167         struct osd_thandle *oh;
4168         int rc;
4169
4170         /* it's possible that object doesn't exist yet */
4171         LASSERT(handle != NULL);
4172
4173         oh = container_of(handle, struct osd_thandle, ot_super);
4174         LASSERT(oh->ot_handle == NULL);
4175
4176         osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
4177                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
4178
4179         rc = osd_idc_find_and_init(env, osd_dev(dt->do_lu.lo_dev),
4180                                    osd_dt_obj(dt));
4181
4182         return rc;
4183 }
4184
4185 /*
4186  * Concurrency: @dt is write locked.
4187  */
4188 static int osd_ref_add(const struct lu_env *env, struct dt_object *dt,
4189                        struct thandle *th)
4190 {
4191         struct osd_object *obj = osd_dt_obj(dt);
4192         struct inode *inode = obj->oo_inode;
4193         struct osd_thandle *oh;
4194         int rc = 0;
4195
4196         if (!dt_object_exists(dt) || obj->oo_destroyed)
4197                 return -ENOENT;
4198
4199         LINVRNT(osd_invariant(obj));
4200         LASSERT(!dt_object_remote(dt));
4201         LASSERT(osd_is_write_locked(env, obj));
4202         LASSERT(th != NULL);
4203
4204         oh = container_of(th, struct osd_thandle, ot_super);
4205         LASSERT(oh->ot_handle != NULL);
4206
4207         osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
4208
4209         CDEBUG(D_INODE, DFID" increase nlink %d\n",
4210                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
4211         /*
4212          * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
4213          * (65000) subdirectories by storing "1" in i_nlink if the link count
4214          * would otherwise overflow. Directory tranversal tools understand
4215          * that (st_nlink == 1) indicates that the filesystem dose not track
4216          * hard links count on the directory, and will not abort subdirectory
4217          * scanning early once (st_nlink - 2) subdirs have been found.
4218          *
4219          * This also has to properly handle the case of inodes with nlink == 0
4220          * in case they are being linked into the PENDING directory
4221          */
4222         spin_lock(&obj->oo_guard);
4223         if (unlikely(inode->i_nlink == 0))
4224                 /* inc_nlink from 0 may cause WARN_ON */
4225                 set_nlink(inode, 1);
4226         else {
4227                 ldiskfs_inc_count(oh->ot_handle, inode);
4228                 if (!S_ISDIR(inode->i_mode))
4229                         LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
4230         }
4231         spin_unlock(&obj->oo_guard);
4232
4233         osd_dirty_inode(inode, I_DIRTY_DATASYNC);
4234         LINVRNT(osd_invariant(obj));
4235
4236         osd_trans_exec_check(env, th, OSD_OT_REF_ADD);
4237
4238         return rc;
4239 }
4240
4241 static int osd_declare_ref_del(const struct lu_env *env, struct dt_object *dt,
4242                                struct thandle *handle)
4243 {
4244         struct osd_thandle *oh;
4245
4246         if (!dt_object_exists(dt))
4247                 return -ENOENT;
4248
4249         LASSERT(!dt_object_remote(dt));
4250         LASSERT(handle != NULL);
4251
4252         oh = container_of(handle, struct osd_thandle, ot_super);
4253         LASSERT(oh->ot_handle == NULL);
4254
4255         osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
4256                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
4257
4258         return 0;
4259 }
4260
4261 /*
4262  * Concurrency: @dt is write locked.
4263  */
4264 static int osd_ref_del(const struct lu_env *env, struct dt_object *dt,
4265                        struct thandle *th)
4266 {
4267         struct osd_object *obj = osd_dt_obj(dt);
4268         struct inode *inode = obj->oo_inode;
4269         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
4270         struct osd_thandle *oh;
4271
4272         if (!dt_object_exists(dt))
4273                 return -ENOENT;
4274
4275         LINVRNT(osd_invariant(obj));
4276         LASSERT(!dt_object_remote(dt));
4277         LASSERT(osd_is_write_locked(env, obj));
4278         LASSERT(th != NULL);
4279
4280         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_REF_DEL))
4281                 return -EIO;
4282
4283         oh = container_of(th, struct osd_thandle, ot_super);
4284         LASSERT(oh->ot_handle != NULL);
4285
4286         osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
4287
4288         spin_lock(&obj->oo_guard);
4289         /*
4290          * That can be result of upgrade from old Lustre version and
4291          * applied only to local files.  Just skip this ref_del call.
4292          * ext4_unlink() only treats this as a warning, don't LASSERT here.
4293          */
4294         if (inode->i_nlink == 0) {
4295                 CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
4296                              D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
4297                              ", maybe an upgraded file? (LU-3915)\n",
4298                              osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
4299                 spin_unlock(&obj->oo_guard);
4300                 return 0;
4301         }
4302
4303         CDEBUG(D_INODE, DFID" decrease nlink %d\n",
4304                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
4305
4306         ldiskfs_dec_count(oh->ot_handle, inode);
4307         spin_unlock(&obj->oo_guard);
4308
4309         osd_dirty_inode(inode, I_DIRTY_DATASYNC);
4310         LINVRNT(osd_invariant(obj));
4311
4312         osd_trans_exec_check(env, th, OSD_OT_REF_DEL);
4313
4314         return 0;
4315 }
4316
4317 /*
4318  * Concurrency: @dt is read locked.
4319  */
4320 static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
4321                          struct lu_buf *buf, const char *name)
4322 {
4323         struct osd_object      *obj    = osd_dt_obj(dt);
4324         struct inode           *inode  = obj->oo_inode;
4325         struct osd_thread_info *info   = osd_oti_get(env);
4326         struct dentry          *dentry = &info->oti_obj_dentry;
4327         bool cache_xattr = false;
4328         int rc;
4329
4330         LASSERT(buf);
4331
4332         /* version get is not real XATTR but uses xattr API */
4333         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
4334                 dt_obj_version_t *ver = buf->lb_buf;
4335
4336                 /*
4337                  * for version we are just using xattr API but change inode
4338                  * field instead
4339                  */
4340                 if (buf->lb_len == 0)
4341                         return sizeof(dt_obj_version_t);
4342
4343                 if (buf->lb_len < sizeof(dt_obj_version_t))
4344                         return -ERANGE;
4345
4346                 CDEBUG(D_INODE, "Get version %#llx for inode %lu\n",
4347                        LDISKFS_I(inode)->i_fs_version, inode->i_ino);
4348
4349                 *ver = LDISKFS_I(inode)->i_fs_version;
4350
4351                 return sizeof(dt_obj_version_t);
4352         }
4353
4354         if (!dt_object_exists(dt))
4355                 return -ENOENT;
4356
4357         LASSERT(!dt_object_remote(dt));
4358         LASSERT(inode->i_op != NULL);
4359 #ifdef HAVE_IOP_XATTR
4360         LASSERT(inode->i_op->getxattr != NULL);
4361 #endif
4362
4363         if (strcmp(name, XATTR_NAME_LOV) == 0 ||
4364             strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0)
4365                 cache_xattr = true;
4366
4367         if (cache_xattr) {
4368                 rc = osd_oxc_get(obj, name, buf);
4369                 if (rc != -ENOENT)
4370                         return rc;
4371         }
4372
4373         if (strcmp(name, XATTR_NAME_FID) == 0 && obj->oo_pfid_in_lma) {
4374                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
4375                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
4376                 struct filter_fid *ff;
4377                 struct ost_layout *ol;
4378
4379                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
4380                 if (rc)
4381                         return rc;
4382
4383                 LASSERT(lma->lma_compat & LMAC_STRIPE_INFO);
4384
4385                 rc = sizeof(*ff);
4386                 if (buf->lb_len == 0 || !buf->lb_buf)
4387                         return rc;
4388
4389                 if (buf->lb_len < rc)
4390                         return -ERANGE;
4391
4392                 ff = buf->lb_buf;
4393                 ol = &ff->ff_layout;
4394                 ol->ol_stripe_count = cpu_to_le32(loa->loa_parent_fid.f_ver >>
4395                                                   PFID_STRIPE_IDX_BITS);
4396                 ol->ol_stripe_size = cpu_to_le32(loa->loa_stripe_size);
4397                 loa->loa_parent_fid.f_ver &= PFID_STRIPE_COUNT_MASK;
4398                 fid_cpu_to_le(&ff->ff_parent, &loa->loa_parent_fid);
4399                 if (lma->lma_compat & LMAC_COMP_INFO) {
4400                         ol->ol_comp_start = cpu_to_le64(loa->loa_comp_start);
4401                         ol->ol_comp_end = cpu_to_le64(loa->loa_comp_end);
4402                         ol->ol_comp_id = cpu_to_le32(loa->loa_comp_id);
4403                 } else {
4404                         ol->ol_comp_start = 0;
4405                         ol->ol_comp_end = 0;
4406                         ol->ol_comp_id = 0;
4407                 }
4408         } else {
4409                 rc = __osd_xattr_get(inode, dentry, name,
4410                                      buf->lb_buf, buf->lb_len);
4411         }
4412
4413         if (cache_xattr) {
4414                 if (rc == -ENOENT || rc == -ENODATA)
4415                         osd_oxc_add(obj, name, NULL, 0);
4416                 else if (rc > 0 && buf->lb_buf != NULL)
4417                         osd_oxc_add(obj, name, buf->lb_buf, rc);
4418         }
4419
4420         return rc;
4421 }
4422
4423 static int osd_declare_xattr_set(const struct lu_env *env,
4424                                  struct dt_object *dt,
4425                                  const struct lu_buf *buf, const char *name,
4426                                  int fl, struct thandle *handle)
4427 {
4428         struct osd_thandle *oh;
4429         int credits = 0;
4430         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
4431
4432         LASSERT(handle != NULL);
4433
4434         oh = container_of(handle, struct osd_thandle, ot_super);
4435         LASSERT(oh->ot_handle == NULL);
4436
4437         if (strcmp(name, XATTR_NAME_LMA) == 0) {
4438                 /*
4439                  * For non-upgrading case, the LMA is set first and
4440                  * usually fit inode. But for upgrade case, the LMA
4441                  * may be in another separated EA block.
4442                  */
4443                 if (dt_object_exists(dt)) {
4444                         if (fl == LU_XATTR_REPLACE)
4445                                 credits = 1;
4446                         else
4447                                 goto upgrade;
4448                 }
4449         } else if (strcmp(name, XATTR_NAME_VERSION) == 0) {
4450                 credits = 1;
4451         } else if (strcmp(name, XATTR_NAME_FID) == 0) {
4452                 /* We may need to delete the old PFID EA. */
4453                 credits = LDISKFS_MAXQUOTAS_DEL_BLOCKS(sb);
4454                 if (fl == LU_XATTR_REPLACE)
4455                         credits += 1;
4456                 else
4457                         goto upgrade;
4458         } else {
4459                 /*
4460                  * If some name entry resides on remote MDT, then will create
4461                  * agent entry under remote parent. On the other hand, if the
4462                  * remote entry will be removed, then related agent entry may
4463                  * need to be removed from the remote parent. So there may be
4464                  * kinds of cases, let's declare enough credits. The credits
4465                  * for create agent entry is enough for remove case.
4466                  */
4467                 if (strcmp(name, XATTR_NAME_LINK) == 0) {
4468                         credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
4469                         if (dt_object_exists(dt))
4470                                 credits += 1; /* For updating LMA */
4471                 }
4472
4473 upgrade:
4474                 credits += osd_dto_credits_noquota[DTO_XATTR_SET];
4475
4476                 if (buf != NULL) {
4477                         ssize_t buflen;
4478
4479                         if (buf->lb_buf == NULL && dt_object_exists(dt)) {
4480                                 /*
4481                                  * learn xattr size from osd_xattr_get if
4482                                  * attribute has not been read yet
4483                                  */
4484                                 buflen = __osd_xattr_get(
4485                                     osd_dt_obj(dt)->oo_inode,
4486                                     &osd_oti_get(env)->oti_obj_dentry,
4487                                     name, NULL, 0);
4488                                 if (buflen < 0)
4489                                         buflen = 0;
4490                         } else {
4491                                 buflen = buf->lb_len;
4492                         }
4493
4494                         if (buflen > sb->s_blocksize) {
4495                                 credits += osd_calc_bkmap_credits(
4496                                     sb, NULL, 0, -1,
4497                                     (buflen + sb->s_blocksize - 1) >>
4498                                     sb->s_blocksize_bits);
4499                         }
4500                 }
4501                 /*
4502                  * xattr set may involve inode quota change, reserve credits for
4503                  * dquot_initialize()
4504                  */
4505                 credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
4506         }
4507
4508         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET, credits);
4509
4510         return 0;
4511 }
4512
4513 static int osd_xattr_set_pfid(const struct lu_env *env, struct osd_object *obj,
4514                               const struct lu_buf *buf, int fl,
4515                               struct thandle *handle)
4516 {
4517         struct osd_thread_info *info = osd_oti_get(env);
4518         struct dentry *dentry = &info->oti_obj_dentry;
4519         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
4520         struct lustre_mdt_attrs *lma = &loa->loa_lma;
4521         struct inode *inode = obj->oo_inode;
4522         struct filter_fid *ff = buf->lb_buf;
4523         struct ost_layout *ol = &ff->ff_layout;
4524         int flags = XATTR_REPLACE;
4525         int rc;
4526
4527         ENTRY;
4528
4529         if (buf->lb_len != sizeof(*ff) && buf->lb_len != sizeof(struct lu_fid))
4530                 RETURN(-EINVAL);
4531
4532         rc = osd_get_lma(info, inode, dentry, loa);
4533         if (rc == -ENODATA) {
4534                 /* Usually for upgarding from old device */
4535                 lustre_loa_init(loa, lu_object_fid(&obj->oo_dt.do_lu),
4536                                 LMAC_FID_ON_OST, 0);
4537                 flags = XATTR_CREATE;
4538         } else if (rc) {
4539                 RETURN(rc);
4540         }
4541
4542         if (!rc && lma->lma_compat & LMAC_STRIPE_INFO) {
4543                 if ((fl & LU_XATTR_CREATE) && !(fl & LU_XATTR_REPLACE))
4544                         RETURN(-EEXIST);
4545
4546                 if (LDISKFS_INODE_SIZE(inode->i_sb) > 256) {
4547                         /* Separate PFID EA from LMA */
4548                         lma->lma_compat &= ~(LMAC_STRIPE_INFO | LMAC_COMP_INFO);
4549                         lustre_lma_swab(lma);
4550                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4551                                              sizeof(*lma), XATTR_REPLACE);
4552                         if (!rc) {
4553                                 obj->oo_pfid_in_lma = 0;
4554                                 rc = LU_XATTR_CREATE;
4555                         }
4556
4557                         RETURN(rc);
4558                 }
4559         } else {
4560                 if (LDISKFS_INODE_SIZE(inode->i_sb) > 256)
4561                         RETURN(fl);
4562
4563                 /*
4564                  * Old client does not send stripe information,
4565                  * then store the PFID EA on disk separatedly.
4566                  */
4567                 if (unlikely(buf->lb_len == sizeof(struct lu_fid) ||
4568                              ol->ol_stripe_size == 0))
4569                         RETURN(fl);
4570
4571                 /* Remove old PFID EA entry firstly. */
4572                 dquot_initialize(inode);
4573                 rc = ll_vfs_removexattr(dentry, inode, XATTR_NAME_FID);
4574                 if (rc == -ENODATA) {
4575                         if ((fl & LU_XATTR_REPLACE) && !(fl & LU_XATTR_CREATE))
4576                                 RETURN(rc);
4577                 } else if (rc) {
4578                         RETURN(rc);
4579                 }
4580         }
4581
4582         fid_le_to_cpu(&loa->loa_parent_fid, &ff->ff_parent);
4583         if (likely(ol->ol_stripe_size != 0)) {
4584                 loa->loa_parent_fid.f_ver |= le32_to_cpu(ol->ol_stripe_count) <<
4585                                              PFID_STRIPE_IDX_BITS;
4586                 loa->loa_stripe_size = le32_to_cpu(ol->ol_stripe_size);
4587                 lma->lma_compat |= LMAC_STRIPE_INFO;
4588                 if (ol->ol_comp_id != 0) {
4589                         loa->loa_comp_id = le32_to_cpu(ol->ol_comp_id);
4590                         loa->loa_comp_start = le64_to_cpu(ol->ol_comp_start);
4591                         loa->loa_comp_end = le64_to_cpu(ol->ol_comp_end);
4592                         lma->lma_compat |= LMAC_COMP_INFO;
4593                 }
4594         }
4595
4596         lustre_loa_swab(loa, false);
4597
4598         /* Store the PFID EA inside LMA. */
4599         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa, sizeof(*loa),
4600                              flags);
4601         if (!rc)
4602                 obj->oo_pfid_in_lma = 1;
4603
4604         RETURN(rc);
4605 }
4606
4607 /*
4608  * In DNE environment, the object (in spite of regular file or directory)
4609  * and its name entry may reside on different MDTs. Under such case, we will
4610  * create an agent entry on the MDT where the object resides. The agent entry
4611  * references the object locally, that makes the object to be visible to the
4612  * userspace when mounted as 'ldiskfs' directly. Then the userspace tools,
4613  * such as 'tar' can handle the object properly.
4614  *
4615  * We handle the agent entry during set linkEA that is the common interface
4616  * for both regular file and directroy, can handle kinds of cases, such as
4617  * create/link/unlink/rename, and so on.
4618  *
4619  * NOTE: we can NOT do that when ea_{insert,delete} that is only for directory.
4620  *
4621  * XXX: There are two known issues:
4622  * 1. For one object, we will create at most one agent entry even if there
4623  *    may be more than one cross-MDTs hard links on the object. So the local
4624  *    e2fsck may claim that the object's nlink is larger than the name entries
4625  *    that reference such inode. And in further, the e2fsck will fix the nlink
4626  *    attribute to match the local references. Then it will cause the object's
4627  *    nlink attribute to be inconsistent with the global references. it is bad
4628  *    but not fatal. The ref_del() can handle the zero-referenced case. On the
4629  *    other hand, the global namespace LFSCK can repair the object's attribute
4630  *    according to the linkEA.
4631  * 2. There may be too many hard links on the object as to its linkEA overflow,
4632  *    then the linkEA entry for cross-MDTs reference may be discarded. If such
4633  *    case happened, then at this point, we do not know whether there are some
4634  *    cross-MDTs reference. But there are local references, it guarantees that
4635  *    object is visible to userspace when mounted as 'ldiskfs'. That is enough.
4636  */
4637 static int osd_xattr_handle_linkea(const struct lu_env *env,
4638                                    struct osd_device *osd,
4639                                    struct osd_object *obj,
4640                                    const struct lu_buf *buf,
4641                                    struct thandle *handle)
4642 {
4643         const struct lu_fid *fid = lu_object_fid(&obj->oo_dt.do_lu);
4644         struct lu_fid *tfid = &osd_oti_get(env)->oti_fid3;
4645         struct linkea_data ldata = { .ld_buf = (struct lu_buf *)buf };
4646         struct lu_name tmpname;
4647         struct osd_thandle *oh;
4648         int rc;
4649         bool remote = false;
4650
4651         ENTRY;
4652
4653         oh = container_of(handle, struct osd_thandle, ot_super);
4654         LASSERT(oh->ot_handle != NULL);
4655
4656         rc = linkea_init_with_rec(&ldata);
4657         if (!rc) {
4658                 linkea_first_entry(&ldata);
4659                 while (ldata.ld_lee != NULL && !remote) {
4660                         linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen,
4661                                             &tmpname, tfid);
4662                         if (osd_remote_fid(env, osd, tfid) > 0)
4663                                 remote = true;
4664                         else
4665                                 linkea_next_entry(&ldata);
4666                 }
4667         } else if (rc == -ENODATA) {
4668                 rc = 0;
4669         } else {
4670                 RETURN(rc);
4671         }
4672
4673         if (lu_object_has_agent_entry(&obj->oo_dt.do_lu) && !remote) {
4674                 rc = osd_delete_from_remote_parent(env, osd, obj, oh, false);
4675                 if (rc)
4676                         CERROR("%s: failed to remove agent entry for "DFID
4677                                ": rc = %d\n", osd_name(osd), PFID(fid), rc);
4678         } else if (!lu_object_has_agent_entry(&obj->oo_dt.do_lu) && remote) {
4679                 rc = osd_add_to_remote_parent(env, osd, obj, oh);
4680                 if (rc)
4681                         CERROR("%s: failed to create agent entry for "DFID
4682                                ": rc = %d\n", osd_name(osd), PFID(fid), rc);
4683         }
4684
4685         RETURN(rc);
4686 }
4687
4688 /*
4689  * Concurrency: @dt is write locked.
4690  */
4691 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
4692                          const struct lu_buf *buf, const char *name, int fl,
4693                          struct thandle *handle)
4694 {
4695         struct osd_object *obj = osd_dt_obj(dt);
4696         struct osd_device *osd = osd_obj2dev(obj);
4697         struct inode *inode = obj->oo_inode;
4698         struct osd_thread_info *info = osd_oti_get(env);
4699         int fs_flags = 0;
4700         int len;
4701         int rc;
4702
4703         ENTRY;
4704
4705         LASSERT(handle);
4706         LASSERT(buf);
4707
4708         /* version set is not real XATTR */
4709         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
4710                 dt_obj_version_t *version = buf->lb_buf;
4711
4712                 /*
4713                  * for version we are just using xattr API but change inode
4714                  * field instead
4715                  */
4716                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
4717
4718                 CDEBUG(D_INODE, "Set version %#llx (old %#llx) for inode %lu\n",
4719                        *version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
4720
4721                 LDISKFS_I(inode)->i_fs_version = *version;
4722                 /*
4723                  * Version is set after all inode operations are finished,
4724                  * so we should mark it dirty here
4725                  */
4726                 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
4727
4728                 RETURN(0);
4729         }
4730
4731         CDEBUG(D_INODE, DFID" set xattr '%s' with size %zu\n",
4732                PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
4733
4734         len = buf->lb_len;
4735         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
4736
4737         /*
4738          * For the OST device with 256 bytes inode size by default,
4739          * the PFID EA will be stored together with LMA EA to avoid
4740          * performance trouble. Otherwise the PFID EA can be stored
4741          * independently. LU-8998
4742          */
4743         if (strcmp(name, XATTR_NAME_FID) == 0 && osd->od_is_ost &&
4744             (LDISKFS_INODE_SIZE(inode->i_sb) <= 256 || obj->oo_pfid_in_lma)) {
4745                 LASSERT(buf->lb_buf);
4746
4747                 fl = osd_xattr_set_pfid(env, obj, buf, fl, handle);
4748                 if (fl <= 0)
4749                         RETURN(fl);
4750         } else if (strcmp(name, XATTR_NAME_LMV) == 0) {
4751                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
4752                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
4753
4754                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
4755                 if (rc)
4756                         RETURN(rc);
4757
4758                 lma->lma_incompat |= LMAI_STRIPED;
4759                 lustre_lma_swab(lma);
4760                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4761                                      sizeof(*lma), XATTR_REPLACE);
4762                 if (rc != 0)
4763                         RETURN(rc);
4764         } else if (strcmp(name, XATTR_NAME_LINK) == 0) {
4765                 LASSERT(!osd->od_is_ost);
4766
4767                 rc = osd_xattr_handle_linkea(env, osd, obj, buf, handle);
4768                 if (rc)
4769                         RETURN(rc);
4770         }
4771
4772         if (fl & LU_XATTR_REPLACE)
4773                 fs_flags |= XATTR_REPLACE;
4774
4775         if (fl & LU_XATTR_CREATE)
4776                 fs_flags |= XATTR_CREATE;
4777
4778         rc = __osd_xattr_set(info, inode, name, buf->lb_buf, len, fs_flags);
4779         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
4780
4781         if (rc == 0 &&
4782             (strcmp(name, XATTR_NAME_LOV) == 0 ||
4783              strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
4784                 osd_oxc_add(obj, name, buf->lb_buf, buf->lb_len);
4785
4786         return rc;
4787 }
4788
4789 /*
4790  * Concurrency: @dt is read locked.
4791  */
4792 static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
4793                           const struct lu_buf *buf)
4794 {
4795         struct osd_object *obj = osd_dt_obj(dt);
4796         struct inode *inode = obj->oo_inode;
4797         struct osd_thread_info *info = osd_oti_get(env);
4798         struct dentry *dentry = &info->oti_obj_dentry;
4799
4800         if (!dt_object_exists(dt))
4801                 return -ENOENT;
4802
4803         LASSERT(!dt_object_remote(dt));
4804         LASSERT(inode->i_op != NULL);
4805         LASSERT(inode->i_op->listxattr != NULL);
4806
4807         dentry->d_inode = inode;
4808         dentry->d_sb = inode->i_sb;
4809         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
4810 }
4811
4812 static int osd_declare_xattr_del(const struct lu_env *env,
4813                                  struct dt_object *dt, const char *name,
4814                                  struct thandle *handle)
4815 {
4816         struct osd_thandle *oh;
4817         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
4818
4819         LASSERT(!dt_object_remote(dt));
4820         LASSERT(handle != NULL);
4821
4822         oh = container_of(handle, struct osd_thandle, ot_super);
4823         LASSERT(oh->ot_handle == NULL);
4824
4825         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
4826                              osd_dto_credits_noquota[DTO_XATTR_SET]);
4827         /*
4828          * xattr del may involve inode quota change, reserve credits for
4829          * dquot_initialize()
4830          */
4831         oh->ot_credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
4832
4833         return 0;
4834 }
4835
4836 /*
4837  * Concurrency: @dt is write locked.
4838  */
4839 static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
4840                          const char *name, struct thandle *handle)
4841 {
4842         struct osd_object *obj = osd_dt_obj(dt);
4843         struct inode *inode = obj->oo_inode;
4844         struct osd_thread_info *info = osd_oti_get(env);
4845         struct dentry *dentry = &info->oti_obj_dentry;
4846         int rc;
4847
4848         if (!dt_object_exists(dt))
4849                 return -ENOENT;
4850
4851         LASSERT(!dt_object_remote(dt));
4852         LASSERT(inode->i_op != NULL);
4853         LASSERT(handle != NULL);
4854 #ifdef HAVE_IOP_XATTR
4855         LASSERT(inode->i_op->removexattr != NULL);
4856 #endif
4857
4858         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
4859
4860         if (strcmp(name, XATTR_NAME_FID) == 0 && obj->oo_pfid_in_lma) {
4861                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
4862
4863                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
4864                                  &info->oti_ost_attrs);
4865                 if (!rc) {
4866                         LASSERT(lma->lma_compat & LMAC_STRIPE_INFO);
4867
4868                         lma->lma_compat &= ~(LMAC_STRIPE_INFO | LMAC_COMP_INFO);
4869                         lustre_lma_swab(lma);
4870                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4871                                              sizeof(*lma), XATTR_REPLACE);
4872                         if (!rc)
4873                                 obj->oo_pfid_in_lma = 0;
4874                 }
4875         } else {
4876                 dquot_initialize(inode);
4877                 dentry->d_inode = inode;
4878                 dentry->d_sb = inode->i_sb;
4879                 rc = ll_vfs_removexattr(dentry, inode, name);
4880         }
4881
4882         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
4883
4884         if (rc == 0 &&
4885             (strcmp(name, XATTR_NAME_LOV) == 0 ||
4886              strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
4887                 osd_oxc_del(obj, name);
4888
4889         return rc;
4890 }
4891
4892 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt,
4893                            __u64 start, __u64 end)
4894 {
4895         struct osd_object *obj = osd_dt_obj(dt);
4896         struct inode *inode = obj->oo_inode;
4897         struct file *file = osd_quasi_file(env, inode);
4898         int rc;
4899
4900         ENTRY;
4901
4902         rc = vfs_fsync_range(file, start, end, 0);
4903
4904         RETURN(rc);
4905 }
4906
4907 static int osd_invalidate(const struct lu_env *env, struct dt_object *dt)
4908 {
4909         return 0;
4910 }
4911
4912 /*
4913  * Index operations.
4914  */
4915
4916 static int osd_iam_index_probe(const struct lu_env *env, struct osd_object *o,
4917                                const struct dt_index_features *feat)
4918 {
4919         struct iam_descr *descr;
4920
4921         if (osd_object_is_root(o))
4922                 return feat == &dt_directory_features;
4923
4924         LASSERT(o->oo_dir != NULL);
4925
4926         descr = o->oo_dir->od_container.ic_descr;
4927         if (feat == &dt_directory_features) {
4928                 if (descr->id_rec_size == sizeof(struct osd_fid_pack))
4929                         return 1;
4930                 else
4931                         return 0;
4932         } else {
4933                 return feat->dif_keysize_min <= descr->id_key_size &&
4934                        descr->id_key_size <= feat->dif_keysize_max &&
4935                        feat->dif_recsize_min <= descr->id_rec_size &&
4936                        descr->id_rec_size <= feat->dif_recsize_max &&
4937                        !(feat->dif_flags & (DT_IND_VARKEY |
4938                                             DT_IND_VARREC | DT_IND_NONUNQ)) &&
4939                        ergo(feat->dif_flags & DT_IND_UPDATE,
4940                             1 /* XXX check that object (and fs) is writable */);
4941         }
4942 }
4943
4944 static int osd_iam_container_init(const struct lu_env *env,
4945                                   struct osd_object *obj,
4946                                   struct osd_directory *dir)
4947 {
4948         struct iam_container *bag = &dir->od_container;
4949         int result;
4950
4951         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
4952         if (result != 0)
4953                 return result;
4954
4955         result = iam_container_setup(bag);
4956         if (result == 0)
4957                 obj->oo_dt.do_index_ops = &osd_index_iam_ops;
4958         else
4959                 iam_container_fini(bag);
4960
4961         return result;
4962 }
4963
4964
4965 /*
4966  * Concurrency: no external locking is necessary.
4967  */
4968 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
4969                          const struct dt_index_features *feat)
4970 {
4971         int result;
4972         int skip_iam = 0;
4973         struct osd_object *obj = osd_dt_obj(dt);
4974
4975         LINVRNT(osd_invariant(obj));
4976
4977         if (osd_object_is_root(obj)) {
4978                 dt->do_index_ops = &osd_index_ea_ops;
4979                 result = 0;
4980         } else if (feat == &dt_directory_features) {
4981                 dt->do_index_ops = &osd_index_ea_ops;
4982                 if (obj->oo_inode == NULL || S_ISDIR(obj->oo_inode->i_mode))
4983                         result = 0;
4984                 else
4985                         result = -ENOTDIR;
4986                 skip_iam = 1;
4987         } else if (unlikely(feat == &dt_otable_features)) {
4988                 dt->do_index_ops = &osd_otable_ops;
4989                 return 0;
4990         } else if (unlikely(feat == &dt_acct_features)) {
4991                 dt->do_index_ops = &osd_acct_index_ops;
4992                 result = 0;
4993                 skip_iam = 1;
4994         } else if (!osd_has_index(obj)) {
4995                 struct osd_directory *dir;
4996                 struct osd_device *osd = osd_obj2dev(obj);
4997                 const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
4998
4999                 OBD_ALLOC_PTR(dir);
5000                 if (dir) {
5001
5002                         spin_lock(&obj->oo_guard);
5003                         if (obj->oo_dir == NULL)
5004                                 obj->oo_dir = dir;
5005                         else
5006                                 /*
5007                                  * Concurrent thread allocated container data.
5008                                  */
5009                                 OBD_FREE_PTR(dir);
5010                         spin_unlock(&obj->oo_guard);
5011                         /*
5012                          * Now, that we have container data, serialize its
5013                          * initialization.
5014                          */
5015                         down_write(&obj->oo_ext_idx_sem);
5016                         /*
5017                          * recheck under lock.
5018                          */
5019
5020                         if (osd_has_index(obj)) {
5021                                 result = 0;
5022                                 goto unlock;
5023                         }
5024
5025                         result = osd_iam_container_init(env, obj, obj->oo_dir);
5026                         if (result || feat == &dt_lfsck_namespace_features ||
5027                             feat == &dt_lfsck_layout_orphan_features ||
5028                             feat == &dt_lfsck_layout_dangling_features)
5029                                 goto unlock;
5030
5031                         result = osd_index_register(osd, fid,
5032                                                     feat->dif_keysize_max,
5033                                                     feat->dif_recsize_max);
5034                         if (result < 0)
5035                                 CWARN("%s: failed to register index "
5036                                       DFID": rc = %d\n",
5037                                       osd_name(osd), PFID(fid), result);
5038                         else if (result > 0)
5039                                 result = 0;
5040                         else
5041                                 CDEBUG(D_LFSCK, "%s: index object "DFID
5042                                        " (%d/%d) registered\n",
5043                                        osd_name(osd), PFID(fid),
5044                                        (int)feat->dif_keysize_max,
5045                                        (int)feat->dif_recsize_max);
5046
5047 unlock:
5048                         up_write(&obj->oo_ext_idx_sem);
5049                 } else {
5050                         result = -ENOMEM;
5051                 }
5052         } else {
5053                 result = 0;
5054         }
5055
5056         if (result == 0 && skip_iam == 0) {
5057                 if (!osd_iam_index_probe(env, obj, feat))
5058                         result = -ENOTDIR;
5059         }
5060         LINVRNT(osd_invariant(obj));
5061
5062         return result;
5063 }
5064
5065 static int osd_otable_it_attr_get(const struct lu_env *env,
5066                                  struct dt_object *dt,
5067                                  struct lu_attr *attr)
5068 {
5069         attr->la_valid = 0;
5070         return 0;
5071 }
5072
5073 static const struct dt_object_operations osd_obj_ops = {
5074         .do_read_lock           = osd_read_lock,
5075         .do_write_lock          = osd_write_lock,
5076         .do_read_unlock         = osd_read_unlock,
5077         .do_write_unlock        = osd_write_unlock,
5078         .do_write_locked        = osd_write_locked,
5079         .do_attr_get            = osd_attr_get,
5080         .do_declare_attr_set    = osd_declare_attr_set,
5081         .do_attr_set            = osd_attr_set,
5082         .do_ah_init             = osd_ah_init,
5083         .do_declare_create      = osd_declare_create,
5084         .do_create              = osd_create,
5085         .do_declare_destroy     = osd_declare_destroy,
5086         .do_destroy             = osd_destroy,
5087         .do_index_try           = osd_index_try,
5088         .do_declare_ref_add     = osd_declare_ref_add,
5089         .do_ref_add             = osd_ref_add,
5090         .do_declare_ref_del     = osd_declare_ref_del,
5091         .do_ref_del             = osd_ref_del,
5092         .do_xattr_get           = osd_xattr_get,
5093         .do_declare_xattr_set   = osd_declare_xattr_set,
5094         .do_xattr_set           = osd_xattr_set,
5095         .do_declare_xattr_del   = osd_declare_xattr_del,
5096         .do_xattr_del           = osd_xattr_del,
5097         .do_xattr_list          = osd_xattr_list,
5098         .do_object_sync         = osd_object_sync,
5099         .do_invalidate          = osd_invalidate,
5100 };
5101
5102 static const struct dt_object_operations osd_obj_otable_it_ops = {
5103         .do_attr_get    = osd_otable_it_attr_get,
5104         .do_index_try   = osd_index_try,
5105 };
5106
5107 static int osd_index_declare_iam_delete(const struct lu_env *env,
5108                                         struct dt_object *dt,
5109                                         const struct dt_key *key,
5110                                         struct thandle *handle)
5111 {
5112         struct osd_thandle *oh;
5113
5114         oh = container_of(handle, struct osd_thandle, ot_super);
5115         LASSERT(oh->ot_handle == NULL);
5116
5117         /* Recycle  may cause additional three blocks to be changed. */
5118         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
5119                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
5120
5121         return 0;
5122 }
5123
5124 /**
5125  *      delete a (key, value) pair from index \a dt specified by \a key
5126  *
5127  *      \param  dt      osd index object
5128  *      \param  key     key for index
5129  *      \param  rec     record reference
5130  *      \param  handle  transaction handler
5131  *
5132  *      \retval  0  success
5133  *      \retval -ve   failure
5134  */
5135 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
5136                                 const struct dt_key *key,
5137                                 struct thandle *handle)
5138 {
5139         struct osd_thread_info *oti = osd_oti_get(env);
5140         struct osd_object *obj = osd_dt_obj(dt);
5141         struct osd_thandle *oh;
5142         struct iam_path_descr *ipd;
5143         struct iam_container *bag = &obj->oo_dir->od_container;
5144         int rc;
5145
5146         ENTRY;
5147
5148         if (!dt_object_exists(dt))
5149                 RETURN(-ENOENT);
5150
5151         LINVRNT(osd_invariant(obj));
5152         LASSERT(!dt_object_remote(dt));
5153         LASSERT(bag->ic_object == obj->oo_inode);
5154         LASSERT(handle != NULL);
5155
5156         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
5157
5158         ipd = osd_idx_ipd_get(env, bag);
5159         if (unlikely(ipd == NULL))
5160                 RETURN(-ENOMEM);
5161
5162         oh = container_of(handle, struct osd_thandle, ot_super);
5163         LASSERT(oh->ot_handle != NULL);
5164         LASSERT(oh->ot_handle->h_transaction != NULL);
5165
5166         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
5167                 /* swab quota uid/gid provided by caller */
5168                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
5169                 key = (const struct dt_key *)&oti->oti_quota_id;
5170         }
5171
5172         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
5173         osd_ipd_put(env, bag, ipd);
5174         LINVRNT(osd_invariant(obj));
5175         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
5176         RETURN(rc);
5177 }
5178
5179 static int osd_index_declare_ea_delete(const struct lu_env *env,
5180                                        struct dt_object *dt,
5181                                        const struct dt_key *key,
5182                                        struct thandle *handle)
5183 {
5184         struct osd_thandle *oh;
5185         struct inode *inode;
5186         int rc, credits;
5187
5188         ENTRY;
5189
5190         LASSERT(!dt_object_remote(dt));
5191         LASSERT(handle != NULL);
5192
5193         oh = container_of(handle, struct osd_thandle, ot_super);
5194         LASSERT(oh->ot_handle == NULL);
5195
5196         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE];
5197         osd_trans_declare_op(env, oh, OSD_OT_DELETE, credits);
5198
5199         inode = osd_dt_obj(dt)->oo_inode;
5200         if (inode == NULL)
5201                 RETURN(-ENOENT);
5202
5203         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
5204                                    i_projid_read(inode), 0, oh, osd_dt_obj(dt),
5205                                    NULL, OSD_QID_BLK);
5206         RETURN(rc);
5207 }
5208
5209 static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
5210                                           struct dt_rec *fid)
5211 {
5212         struct osd_fid_pack *rec;
5213         int rc = -ENODATA;
5214
5215         if (de->file_type & LDISKFS_DIRENT_LUFID) {
5216                 rec = (struct osd_fid_pack *)(de->name + de->name_len + 1);
5217                 rc = osd_fid_unpack((struct lu_fid *)fid, rec);
5218                 if (rc == 0 && unlikely(!fid_is_sane((struct lu_fid *)fid)))
5219                         rc = -EINVAL;
5220         }
5221         return rc;
5222 }
5223
5224 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
5225                           const struct lu_fid *fid)
5226 {
5227         struct seq_server_site *ss = osd_seq_site(osd);
5228
5229         ENTRY;
5230
5231         /* FID seqs not in FLDB, must be local seq */
5232         if (unlikely(!fid_seq_in_fldb(fid_seq(fid))))
5233                 RETURN(0);
5234
5235         /*
5236          * If FLD is not being initialized yet, it only happens during the
5237          * initialization, likely during mgs initialization, and we assume
5238          * this is local FID.
5239          */
5240         if (ss == NULL || ss->ss_server_fld == NULL)
5241                 RETURN(0);
5242
5243         /* Only check the local FLDB here */
5244         if (osd_seq_exists(env, osd, fid_seq(fid)))
5245                 RETURN(0);
5246
5247         RETURN(1);
5248 }
5249
5250 static void osd_take_care_of_agent(const struct lu_env *env,
5251                                    struct osd_device *osd,
5252                                    struct osd_thandle *oh,
5253                                    struct ldiskfs_dir_entry_2 *de)
5254 {
5255         struct lu_fid *fid = &osd_oti_get(env)->oti_fid;
5256         struct osd_idmap_cache *idc;
5257         int rc, schedule = 0;
5258
5259         LASSERT(de != NULL);
5260
5261         rc = osd_get_fid_from_dentry(de, (struct dt_rec *)fid);
5262         if (likely(rc == 0)) {
5263                 idc = osd_idc_find_or_init(env, osd, fid);
5264                 if (IS_ERR(idc) || idc->oic_remote)
5265                         schedule = 1;
5266         } else if (rc == -ENODATA) {
5267                 /*
5268                  * can't get FID, postpone to the end of the
5269                  * transaction when iget() is safe
5270                  */
5271                 schedule = 1;
5272         } else {
5273                 CERROR("%s: can't get FID: rc = %d\n", osd_name(osd), rc);
5274         }
5275         if (schedule)
5276                 osd_schedule_agent_inode_removal(env, oh,
5277                                                  le32_to_cpu(de->inode));
5278 }
5279
5280 /**
5281  * Index delete function for interoperability mode (b11826).
5282  * It will remove the directory entry added by osd_index_ea_insert().
5283  * This entry is needed to maintain name->fid mapping.
5284  *
5285  * \param key,  key i.e. file entry to be deleted
5286  *
5287  * \retval   0, on success
5288  * \retval -ve, on error
5289  */
5290 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
5291                                const struct dt_key *key, struct thandle *handle)
5292 {
5293         struct osd_object *obj = osd_dt_obj(dt);
5294         struct inode *dir = obj->oo_inode;
5295         struct dentry *dentry;
5296         struct osd_thandle *oh;
5297         struct ldiskfs_dir_entry_2 *de = NULL;
5298         struct buffer_head *bh;
5299         struct htree_lock *hlock = NULL;
5300         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
5301         int rc;
5302
5303         ENTRY;
5304
5305         if (!dt_object_exists(dt))
5306                 RETURN(-ENOENT);
5307
5308         LINVRNT(osd_invariant(obj));
5309         LASSERT(!dt_object_remote(dt));
5310         LASSERT(handle != NULL);
5311
5312         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
5313
5314         oh = container_of(handle, struct osd_thandle, ot_super);
5315         LASSERT(oh->ot_handle != NULL);
5316         LASSERT(oh->ot_handle->h_transaction != NULL);
5317
5318         dquot_initialize(dir);
5319         dentry = osd_child_dentry_get(env, obj,
5320                                       (char *)key, strlen((char *)key));
5321
5322         if (obj->oo_hl_head != NULL) {
5323                 hlock = osd_oti_get(env)->oti_hlock;
5324                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
5325                                    dir, LDISKFS_HLOCK_DEL);
5326         } else {
5327                 down_write(&obj->oo_ext_idx_sem);
5328         }
5329
5330         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
5331         if (!IS_ERR(bh)) {
5332                 /*
5333                  * If this is not the ".." entry, it might be a remote DNE
5334                  * entry and  we need to check if the FID is for a remote
5335                  * MDT.  If the FID is  not in the directory entry (e.g.
5336                  * upgraded 1.8 filesystem without dirdata enabled) then
5337                  * we need to get the FID from the LMA. For a remote directory
5338                  * there HAS to be an LMA, it cannot be an IGIF inode in this
5339                  * case.
5340                  *
5341                  * Delete the entry before the agent inode in order to
5342                  * simplify error handling.  At worst an error after deleting
5343                  * the entry first might leak the agent inode afterward. The
5344                  * reverse would need filesystem abort in case of error deleting
5345                  * the entry after the agent had been removed, or leave a
5346                  * dangling entry pointing at a random inode.
5347                  */
5348                 if (strcmp((char *)key, dotdot) != 0)
5349                         osd_take_care_of_agent(env, osd, oh, de);
5350                 rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
5351                 brelse(bh);
5352         } else {
5353                 rc = PTR_ERR(bh);
5354         }
5355
5356         if (!rc && fid_is_namespace_visible(lu_object_fid(&dt->do_lu)) &&
5357             obj->oo_dirent_count != LU_DIRENT_COUNT_UNSET) {
5358                 /* NB, dirent count may not be accurate, because it's counted
5359                  * without lock.
5360                  */
5361                 if (obj->oo_dirent_count)
5362                         obj->oo_dirent_count--;
5363                 else
5364                         obj->oo_dirent_count = LU_DIRENT_COUNT_UNSET;
5365         }
5366         if (hlock != NULL)
5367                 ldiskfs_htree_unlock(hlock);
5368         else
5369                 up_write(&obj->oo_ext_idx_sem);
5370         GOTO(out, rc);
5371 out:
5372         LASSERT(osd_invariant(obj));
5373         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
5374         RETURN(rc);
5375 }
5376
5377 /**
5378  *      Lookup index for \a key and copy record to \a rec.
5379  *
5380  *      \param  dt      osd index object
5381  *      \param  key     key for index
5382  *      \param  rec     record reference
5383  *
5384  *      \retval  +ve  success : exact mach
5385  *      \retval  0    return record with key not greater than \a key
5386  *      \retval -ve   failure
5387  */
5388 static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
5389                                 struct dt_rec *rec, const struct dt_key *key)
5390 {
5391         struct osd_object *obj = osd_dt_obj(dt);
5392         struct iam_path_descr *ipd;
5393         struct iam_container *bag = &obj->oo_dir->od_container;
5394         struct osd_thread_info *oti = osd_oti_get(env);
5395         struct iam_iterator *it = &oti->oti_idx_it;
5396         struct iam_rec *iam_rec;
5397         int rc;
5398
5399         ENTRY;
5400
5401         if (!dt_object_exists(dt))
5402                 RETURN(-ENOENT);
5403
5404         LASSERT(osd_invariant(obj));
5405         LASSERT(!dt_object_remote(dt));
5406         LASSERT(bag->ic_object == obj->oo_inode);
5407
5408         ipd = osd_idx_ipd_get(env, bag);
5409         if (IS_ERR(ipd))
5410                 RETURN(-ENOMEM);
5411
5412         /* got ipd now we can start iterator. */
5413         iam_it_init(it, bag, 0, ipd);
5414
5415         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
5416                 /* swab quota uid/gid provided by caller */
5417                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
5418                 key = (const struct dt_key *)&oti->oti_quota_id;
5419         }
5420
5421         rc = iam_it_get(it, (struct iam_key *)key);
5422         if (rc >= 0) {
5423                 if (S_ISDIR(obj->oo_inode->i_mode))
5424                         iam_rec = (struct iam_rec *)oti->oti_ldp;
5425                 else
5426                         iam_rec = (struct iam_rec *)rec;
5427
5428                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)iam_rec);
5429
5430                 if (S_ISDIR(obj->oo_inode->i_mode))
5431                         osd_fid_unpack((struct lu_fid *)rec,
5432                                        (struct osd_fid_pack *)iam_rec);
5433                 else if (fid_is_quota(lu_object_fid(&dt->do_lu)))
5434                         osd_quota_unpack(obj, rec);
5435         }
5436
5437         iam_it_put(it);
5438         iam_it_fini(it);
5439         osd_ipd_put(env, bag, ipd);
5440
5441         LINVRNT(osd_invariant(obj));
5442
5443         RETURN(rc);
5444 }
5445
5446 static int osd_index_declare_iam_insert(const struct lu_env *env,
5447                                         struct dt_object *dt,
5448                                         const struct dt_rec *rec,
5449                                         const struct dt_key *key,
5450                                         struct thandle *handle)
5451 {
5452         struct osd_thandle *oh;
5453
5454         LASSERT(handle != NULL);
5455
5456         oh = container_of(handle, struct osd_thandle, ot_super);
5457         LASSERT(oh->ot_handle == NULL);
5458
5459         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
5460                              osd_dto_credits_noquota[DTO_INDEX_INSERT]);
5461
5462         return 0;
5463 }
5464
5465 /**
5466  *      Inserts (key, value) pair in \a dt index object.
5467  *
5468  *      \param  dt      osd index object
5469  *      \param  key     key for index
5470  *      \param  rec     record reference
5471  *      \param  th      transaction handler
5472  *
5473  *      \retval  0  success
5474  *      \retval -ve failure
5475  */
5476 static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
5477                                 const struct dt_rec *rec,
5478                                 const struct dt_key *key, struct thandle *th)
5479 {
5480         struct osd_object *obj = osd_dt_obj(dt);
5481         struct iam_path_descr *ipd;
5482         struct osd_thandle *oh;
5483         struct iam_container *bag;
5484         struct osd_thread_info *oti = osd_oti_get(env);
5485         struct iam_rec *iam_rec;
5486         int rc;
5487
5488         ENTRY;
5489
5490         if (!dt_object_exists(dt))
5491                 RETURN(-ENOENT);
5492
5493         LINVRNT(osd_invariant(obj));
5494         LASSERT(!dt_object_remote(dt));
5495
5496         bag = &obj->oo_dir->od_container;
5497         LASSERT(bag->ic_object == obj->oo_inode);
5498         LASSERT(th != NULL);
5499
5500         osd_trans_exec_op(env, th, OSD_OT_INSERT);
5501
5502         ipd = osd_idx_ipd_get(env, bag);
5503         if (unlikely(ipd == NULL))
5504                 RETURN(-ENOMEM);
5505
5506         oh = container_of(th, struct osd_thandle, ot_super);
5507         LASSERT(oh->ot_handle != NULL);
5508         LASSERT(oh->ot_handle->h_transaction != NULL);
5509         if (S_ISDIR(obj->oo_inode->i_mode)) {
5510                 iam_rec = (struct iam_rec *)oti->oti_ldp;
5511                 osd_fid_pack((struct osd_fid_pack *)iam_rec, rec,
5512                              &oti->oti_fid);
5513         } else if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
5514                 /* pack quota uid/gid */
5515                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
5516                 key = (const struct dt_key *)&oti->oti_quota_id;
5517                 /* pack quota record */
5518                 rec = osd_quota_pack(obj, rec, &oti->oti_quota_rec);
5519                 iam_rec = (struct iam_rec *)rec;
5520         } else {
5521                 iam_rec = (struct iam_rec *)rec;
5522         }
5523
5524         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
5525                         iam_rec, ipd);
5526         osd_ipd_put(env, bag, ipd);
5527         LINVRNT(osd_invariant(obj));
5528         osd_trans_exec_check(env, th, OSD_OT_INSERT);
5529         RETURN(rc);
5530 }
5531
5532 /**
5533  * Calls ldiskfs_add_entry() to add directory entry
5534  * into the directory. This is required for
5535  * interoperability mode (b11826)
5536  *
5537  * \retval   0, on success
5538  * \retval -ve, on error
5539  */
5540 static int __osd_ea_add_rec(struct osd_thread_info *info,
5541                             struct osd_object *pobj, struct inode  *cinode,
5542                             const char *name, const struct lu_fid *fid,
5543                             struct htree_lock *hlock, struct thandle *th)
5544 {
5545         struct ldiskfs_dentry_param *ldp;
5546         struct dentry *child;
5547         struct osd_thandle *oth;
5548         int rc;
5549
5550         oth = container_of(th, struct osd_thandle, ot_super);
5551         LASSERT(oth->ot_handle != NULL);
5552         LASSERT(oth->ot_handle->h_transaction != NULL);
5553         LASSERT(pobj->oo_inode);
5554
5555         ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
5556         if (unlikely(pobj->oo_inode ==
5557                      osd_sb(osd_obj2dev(pobj))->s_root->d_inode))
5558                 ldp->edp_magic = 0;
5559         else
5560                 osd_get_ldiskfs_dirent_param(ldp, fid);
5561         child = osd_child_dentry_get(info->oti_env, pobj, name, strlen(name));
5562         child->d_fsdata = (void *)ldp;
5563         dquot_initialize(pobj->oo_inode);
5564         rc = osd_ldiskfs_add_entry(info, osd_obj2dev(pobj), oth->ot_handle,
5565                                    child, cinode, hlock);
5566         if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_TYPE)) {
5567                 struct ldiskfs_dir_entry_2      *de;
5568                 struct buffer_head              *bh;
5569                 int                              rc1;
5570
5571                 bh = osd_ldiskfs_find_entry(pobj->oo_inode, &child->d_name, &de,
5572                                             NULL, hlock);
5573                 if (!IS_ERR(bh)) {
5574                         rc1 = ldiskfs_journal_get_write_access(oth->ot_handle,
5575                                                                bh);
5576                         if (rc1 == 0) {
5577                                 if (S_ISDIR(cinode->i_mode))
5578                                         de->file_type = LDISKFS_DIRENT_LUFID |
5579                                                         LDISKFS_FT_REG_FILE;
5580                                 else
5581                                         de->file_type = LDISKFS_DIRENT_LUFID |
5582                                                         LDISKFS_FT_DIR;
5583                                 ldiskfs_handle_dirty_metadata(oth->ot_handle,
5584                                                               NULL, bh);
5585                         }
5586                         brelse(bh);
5587                 }
5588         }
5589
5590         RETURN(rc);
5591 }
5592
5593 /**
5594  * Calls ldiskfs_add_dot_dotdot() to add dot and dotdot entries
5595  * into the directory.Also sets flags into osd object to
5596  * indicate dot and dotdot are created. This is required for
5597  * interoperability mode (b11826)
5598  *
5599  * \param dir   directory for dot and dotdot fixup.
5600  * \param obj   child object for linking
5601  *
5602  * \retval   0, on success
5603  * \retval -ve, on error
5604  */
5605 static int osd_add_dot_dotdot(struct osd_thread_info *info,
5606                               struct osd_object *dir,
5607                               struct inode *parent_dir, const char *name,
5608                               const struct lu_fid *dot_fid,
5609                               const struct lu_fid *dot_dot_fid,
5610                               struct thandle *th)
5611 {
5612         struct inode *inode = dir->oo_inode;
5613         struct osd_thandle *oth;
5614         int result = 0;
5615
5616         oth = container_of(th, struct osd_thandle, ot_super);
5617         LASSERT(oth->ot_handle->h_transaction != NULL);
5618         LASSERT(S_ISDIR(dir->oo_inode->i_mode));
5619
5620         if (strcmp(name, dot) == 0) {
5621                 if (dir->oo_compat_dot_created) {
5622                         result = -EEXIST;
5623                 } else {
5624                         LASSERT(inode->i_ino == parent_dir->i_ino);
5625                         dir->oo_compat_dot_created = 1;
5626                         result = 0;
5627                 }
5628         } else if (strcmp(name, dotdot) == 0) {
5629                 if (!dir->oo_compat_dot_created)
5630                         return -EINVAL;
5631                 /* in case of rename, dotdot is already created */
5632                 if (dir->oo_compat_dotdot_created) {
5633                         return __osd_ea_add_rec(info, dir, parent_dir, name,
5634                                                 dot_dot_fid, NULL, th);
5635                 }
5636
5637                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PARENT)) {
5638                         struct lu_fid tfid = *dot_dot_fid;
5639
5640                         tfid.f_oid--;
5641                         result = osd_add_dot_dotdot_internal(info,
5642                                         dir->oo_inode, parent_dir, dot_fid,
5643                                         &tfid, oth);
5644                 } else {
5645                         result = osd_add_dot_dotdot_internal(info,
5646                                         dir->oo_inode, parent_dir, dot_fid,
5647                                         dot_dot_fid, oth);
5648                 }
5649
5650                 if (result == 0)
5651                         dir->oo_compat_dotdot_created = 1;
5652         }
5653
5654         return result;
5655 }
5656
5657
5658 /**
5659  * It will call the appropriate osd_add* function and return the
5660  * value, return by respective functions.
5661  */
5662 static int osd_ea_add_rec(const struct lu_env *env, struct osd_object *pobj,
5663                           struct inode *cinode, const char *name,
5664                           const struct lu_fid *fid, struct thandle *th)
5665 {
5666         struct osd_thread_info *info = osd_oti_get(env);
5667         struct htree_lock *hlock;
5668         int rc;
5669
5670         hlock = pobj->oo_hl_head != NULL ? info->oti_hlock : NULL;
5671
5672         if (name[0] == '.' && (name[1] == '\0' ||
5673                                (name[1] == '.' && name[2] == '\0'))) {
5674                 if (hlock != NULL) {
5675                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
5676                                            pobj->oo_inode, 0);
5677                 } else {
5678                         down_write(&pobj->oo_ext_idx_sem);
5679                 }
5680
5681                 rc = osd_add_dot_dotdot(info, pobj, cinode, name,
5682                                         lu_object_fid(&pobj->oo_dt.do_lu),
5683                                         fid, th);
5684         } else {
5685                 if (hlock != NULL) {
5686                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
5687                                            pobj->oo_inode, LDISKFS_HLOCK_ADD);
5688                 } else {
5689                         down_write(&pobj->oo_ext_idx_sem);
5690                 }
5691
5692                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_INDIR)) {
5693                         struct lu_fid *tfid = &info->oti_fid;
5694
5695                         *tfid = *fid;
5696                         tfid->f_ver = ~0;
5697                         rc = __osd_ea_add_rec(info, pobj, cinode, name,
5698                                               tfid, hlock, th);
5699                 } else {
5700                         rc = __osd_ea_add_rec(info, pobj, cinode, name, fid,
5701                                               hlock, th);
5702                 }
5703         }
5704         if (!rc && fid_is_namespace_visible(lu_object_fid(&pobj->oo_dt.do_lu))
5705             && pobj->oo_dirent_count != LU_DIRENT_COUNT_UNSET)
5706                 pobj->oo_dirent_count++;
5707
5708         if (hlock != NULL)
5709                 ldiskfs_htree_unlock(hlock);
5710         else
5711                 up_write(&pobj->oo_ext_idx_sem);
5712
5713         return rc;
5714 }
5715
5716 static int
5717 osd_consistency_check(struct osd_thread_info *oti, struct osd_device *dev,
5718                       struct osd_idmap_cache *oic)
5719 {
5720         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
5721         struct lu_fid *fid = &oic->oic_fid;
5722         struct osd_inode_id *id = &oic->oic_lid;
5723         struct inode *inode = NULL;
5724         int once = 0;
5725         bool insert;
5726         int rc;
5727
5728         ENTRY;
5729
5730         if (!fid_is_norm(fid) && !fid_is_igif(fid))
5731                 RETURN(0);
5732
5733         if (scrub->os_running && scrub->os_pos_current > id->oii_ino)
5734                 RETURN(0);
5735
5736         if (dev->od_auto_scrub_interval == AS_NEVER ||
5737             ktime_get_real_seconds() <
5738             scrub->os_file.sf_time_last_complete + dev->od_auto_scrub_interval)
5739                 RETURN(0);
5740
5741 again:
5742         rc = osd_oi_lookup(oti, dev, fid, &oti->oti_id, 0);
5743         if (rc == -ENOENT) {
5744                 __u32 gen = id->oii_gen;
5745
5746                 insert = true;
5747                 if (inode != NULL)
5748                         goto trigger;
5749
5750                 inode = osd_iget(oti, dev, id);
5751                 /* The inode has been removed (by race maybe). */
5752                 if (IS_ERR(inode)) {
5753                         rc = PTR_ERR(inode);
5754
5755                         RETURN(rc == -ESTALE ? -ENOENT : rc);
5756                 }
5757
5758                 /* The OI mapping is lost. */
5759                 if (gen != OSD_OII_NOGEN)
5760                         goto trigger;
5761
5762                 /*
5763                  * The inode may has been reused by others, we do not know,
5764                  * leave it to be handled by subsequent osd_fid_lookup().
5765                  */
5766                 GOTO(out, rc = 0);
5767         } else if (rc || osd_id_eq(id, &oti->oti_id)) {
5768                 GOTO(out, rc);
5769         }
5770
5771         insert = false;
5772
5773 trigger:
5774         if (scrub->os_running) {
5775                 if (inode == NULL) {
5776                         inode = osd_iget(oti, dev, id);
5777                         /* The inode has been removed (by race maybe). */
5778                         if (IS_ERR(inode)) {
5779                                 rc = PTR_ERR(inode);
5780
5781                                 RETURN(rc == -ESTALE ? -ENOENT : rc);
5782                         }
5783                 }
5784
5785                 rc = osd_oii_insert(dev, oic, insert);
5786                 /*
5787                  * There is race condition between osd_oi_lookup and OI scrub.
5788                  * The OI scrub finished just after osd_oi_lookup() failure.
5789                  * Under such case, it is unnecessary to trigger OI scrub again,
5790                  * but try to call osd_oi_lookup() again.
5791                  */
5792                 if (unlikely(rc == -EAGAIN))
5793                         goto again;
5794
5795                 if (!S_ISDIR(inode->i_mode))
5796                         rc = 0;
5797                 else
5798                         rc = osd_check_lmv(oti, dev, inode, oic);
5799
5800                 GOTO(out, rc);
5801         }
5802
5803         if (dev->od_auto_scrub_interval != AS_NEVER && ++once == 1) {
5804                 rc = osd_scrub_start(oti->oti_env, dev, SS_AUTO_PARTIAL |
5805                                      SS_CLEAR_DRYRUN | SS_CLEAR_FAILOUT);
5806                 CDEBUG(D_LFSCK | D_CONSOLE | D_WARNING,
5807                        "%s: trigger partial OI scrub for RPC inconsistency checking FID "DFID": rc = %d\n",
5808                        osd_dev2name(dev), PFID(fid), rc);
5809                 if (rc == 0 || rc == -EALREADY)
5810                         goto again;
5811         }
5812
5813         GOTO(out, rc);
5814
5815 out:
5816         if (inode)
5817                 iput(inode);
5818
5819         RETURN(rc);
5820 }
5821
5822 static int osd_fail_fid_lookup(struct osd_thread_info *oti,
5823                                struct osd_device *dev,
5824                                struct osd_idmap_cache *oic,
5825                                struct lu_fid *fid, __u32 ino)
5826 {
5827         struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
5828         struct inode *inode;
5829         int rc;
5830
5831         osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
5832         inode = osd_iget(oti, dev, &oic->oic_lid);
5833         if (IS_ERR(inode)) {
5834                 fid_zero(&oic->oic_fid);
5835                 return PTR_ERR(inode);
5836         }
5837
5838         rc = osd_get_lma(oti, inode, &oti->oti_obj_dentry, loa);
5839         iput(inode);
5840         if (rc != 0)
5841                 fid_zero(&oic->oic_fid);
5842         else
5843                 *fid = oic->oic_fid = loa->loa_lma.lma_self_fid;
5844         return rc;
5845 }
5846
5847 void osd_add_oi_cache(struct osd_thread_info *info, struct osd_device *osd,
5848                       struct osd_inode_id *id, const struct lu_fid *fid)
5849 {
5850         CDEBUG(D_INODE, "add "DFID" %u:%u to info %p\n", PFID(fid),
5851                id->oii_ino, id->oii_gen, info);
5852         info->oti_cache.oic_lid = *id;
5853         info->oti_cache.oic_fid = *fid;
5854         info->oti_cache.oic_dev = osd;
5855 }
5856
5857 /**
5858  * Get parent FID from the linkEA.
5859  *
5860  * For a directory which parent resides on remote MDT, to satisfy the
5861  * local e2fsck, we insert it into the /REMOTE_PARENT_DIR locally. On
5862  * the other hand, to make the lookup(..) on the directory can return
5863  * the real parent FID, we append the real parent FID after its ".."
5864  * name entry in the /REMOTE_PARENT_DIR.
5865  *
5866  * Unfortunately, such PFID-in-dirent cannot be preserved via file-level
5867  * backup. So after the restore, we cannot get the right parent FID from
5868  * its ".." name entry in the /REMOTE_PARENT_DIR. Under such case, since
5869  * we have stored the real parent FID in the directory object's linkEA,
5870  * we can parse the linkEA for the real parent FID.
5871  *
5872  * \param[in] env       pointer to the thread context
5873  * \param[in] obj       pointer to the object to be handled
5874  * \param[out]fid       pointer to the buffer to hold the parent FID
5875  *
5876  * \retval              0 for getting the real parent FID successfully
5877  * \retval              negative error number on failure
5878  */
5879 static int osd_get_pfid_from_linkea(const struct lu_env *env,
5880                                     struct osd_object *obj,
5881                                     struct lu_fid *fid)
5882 {
5883         struct osd_thread_info *oti = osd_oti_get(env);
5884         struct lu_buf *buf = &oti->oti_big_buf;
5885         struct dentry *dentry = &oti->oti_obj_dentry;
5886         struct inode *inode = obj->oo_inode;
5887         struct linkea_data ldata = { NULL };
5888         int rc;
5889
5890         ENTRY;
5891
5892         fid_zero(fid);
5893         if (!S_ISDIR(inode->i_mode))
5894                 RETURN(-EIO);
5895
5896 again:
5897         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
5898                              buf->lb_buf, buf->lb_len);
5899         if (rc == -ERANGE) {
5900                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
5901                                      NULL, 0);
5902                 if (rc > 0) {
5903                         lu_buf_realloc(buf, rc);
5904                         if (buf->lb_buf == NULL)
5905                                 RETURN(-ENOMEM);
5906
5907                         goto again;
5908                 }
5909         }
5910
5911         if (unlikely(rc == 0))
5912                 RETURN(-ENODATA);
5913
5914         if (rc < 0)
5915                 RETURN(rc);
5916
5917         if (unlikely(buf->lb_buf == NULL)) {
5918                 lu_buf_realloc(buf, rc);
5919                 if (buf->lb_buf == NULL)
5920                         RETURN(-ENOMEM);
5921
5922                 goto again;
5923         }
5924
5925         ldata.ld_buf = buf;
5926         rc = linkea_init_with_rec(&ldata);
5927         if (!rc) {
5928                 linkea_first_entry(&ldata);
5929                 linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, NULL, fid);
5930         }
5931
5932         RETURN(rc);
5933 }
5934
5935 static int osd_verify_ent_by_linkea(const struct lu_env *env,
5936                                     struct inode *inode,
5937                                     const struct lu_fid *pfid,
5938                                     const char *name, const int namelen)
5939 {
5940         struct osd_thread_info *oti = osd_oti_get(env);
5941         struct lu_buf *buf = &oti->oti_big_buf;
5942         struct dentry *dentry = &oti->oti_obj_dentry;
5943         struct linkea_data ldata = { NULL };
5944         struct lu_name cname = { .ln_name = name,
5945                                  .ln_namelen = namelen };
5946         int rc;
5947
5948         ENTRY;
5949
5950 again:
5951         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
5952                              buf->lb_buf, buf->lb_len);
5953         if (rc == -ERANGE)
5954                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK, NULL, 0);
5955
5956         if (rc < 0)
5957                 RETURN(rc);
5958
5959         if (unlikely(rc == 0))
5960                 RETURN(-ENODATA);
5961
5962         if (buf->lb_len < rc) {
5963                 lu_buf_realloc(buf, rc);
5964                 if (buf->lb_buf == NULL)
5965                         RETURN(-ENOMEM);
5966
5967                 goto again;
5968         }
5969
5970         ldata.ld_buf = buf;
5971         rc = linkea_init_with_rec(&ldata);
5972         if (!rc)
5973                 rc = linkea_links_find(&ldata, &cname, pfid);
5974
5975         RETURN(rc);
5976 }
5977
5978 /**
5979  * Calls ->lookup() to find dentry. From dentry get inode and
5980  * read inode's ea to get fid. This is required for  interoperability
5981  * mode (b11826)
5982  *
5983  * \retval   0, on success
5984  * \retval -ve, on error
5985  */
5986 static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
5987                              struct dt_rec *rec, const struct dt_key *key)
5988 {
5989         struct inode *dir = obj->oo_inode;
5990         struct dentry *dentry;
5991         struct ldiskfs_dir_entry_2 *de;
5992         struct buffer_head *bh;
5993         struct lu_fid *fid = (struct lu_fid *)rec;
5994         struct htree_lock *hlock = NULL;
5995         int ino;
5996         int rc;
5997
5998         ENTRY;
5999
6000         LASSERT(dir->i_op != NULL);
6001         LASSERT(dir->i_op->lookup != NULL);
6002
6003         dentry = osd_child_dentry_get(env, obj,
6004                                       (char *)key, strlen((char *)key));
6005
6006         if (obj->oo_hl_head != NULL) {
6007                 hlock = osd_oti_get(env)->oti_hlock;
6008                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
6009                                    dir, LDISKFS_HLOCK_LOOKUP);
6010         } else {
6011                 down_read(&obj->oo_ext_idx_sem);
6012         }
6013
6014         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
6015         if (!IS_ERR(bh)) {
6016                 struct osd_thread_info *oti = osd_oti_get(env);
6017                 struct osd_inode_id *id = &oti->oti_id;
6018                 struct osd_idmap_cache *oic = &oti->oti_cache;
6019                 struct osd_device *dev = osd_obj2dev(obj);
6020
6021                 ino = le32_to_cpu(de->inode);
6022                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP)) {
6023                         brelse(bh);
6024                         rc = osd_fail_fid_lookup(oti, dev, oic, fid, ino);
6025                         GOTO(out, rc);
6026                 }
6027
6028                 rc = osd_get_fid_from_dentry(de, rec);
6029
6030                 /* done with de, release bh */
6031                 brelse(bh);
6032                 if (rc != 0) {
6033                         if (unlikely(is_remote_parent_ino(dev, ino))) {
6034                                 const char *name = (const char *)key;
6035
6036                                 /*
6037                                  * If the parent is on remote MDT, and there
6038                                  * is no FID-in-dirent, then we have to get
6039                                  * the parent FID from the linkEA.
6040                                  */
6041                                 if (likely(strlen(name) == 2 &&
6042                                            name[0] == '.' && name[1] == '.'))
6043                                         rc = osd_get_pfid_from_linkea(env, obj,
6044                                                                       fid);
6045                         } else {
6046                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
6047                         }
6048                 } else {
6049                         osd_id_gen(id, ino, OSD_OII_NOGEN);
6050                 }
6051
6052                 if (rc != 0 || osd_remote_fid(env, dev, fid)) {
6053                         fid_zero(&oic->oic_fid);
6054
6055                         GOTO(out, rc);
6056                 }
6057
6058                 osd_add_oi_cache(osd_oti_get(env), osd_obj2dev(obj), id, fid);
6059                 rc = osd_consistency_check(oti, dev, oic);
6060                 if (rc == -ENOENT)
6061                         fid_zero(&oic->oic_fid);
6062                 else
6063                         /* Other error should not affect lookup result. */
6064                         rc = 0;
6065         } else {
6066                 rc = PTR_ERR(bh);
6067         }
6068
6069         GOTO(out, rc);
6070
6071 out:
6072         if (hlock != NULL)
6073                 ldiskfs_htree_unlock(hlock);
6074         else
6075                 up_read(&obj->oo_ext_idx_sem);
6076         return rc;
6077 }
6078
6079 static int osd_index_declare_ea_insert(const struct lu_env *env,
6080                                        struct dt_object *dt,
6081                                        const struct dt_rec *rec,
6082                                        const struct dt_key *key,
6083                                        struct thandle *handle)
6084 {
6085         struct osd_thandle *oh;
6086         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
6087         struct dt_insert_rec *rec1 = (struct dt_insert_rec *)rec;
6088         const struct lu_fid *fid = rec1->rec_fid;
6089         int credits, rc = 0;
6090         struct osd_idmap_cache *idc;
6091
6092         ENTRY;
6093
6094         LASSERT(!dt_object_remote(dt));
6095         LASSERT(handle != NULL);
6096         LASSERT(fid != NULL);
6097         LASSERT(rec1->rec_type != 0);
6098
6099         oh = container_of(handle, struct osd_thandle, ot_super);
6100         LASSERT(oh->ot_handle == NULL);
6101
6102         credits = osd_dto_credits_noquota[DTO_INDEX_INSERT];
6103
6104         /*
6105          * we can't call iget() while a transactions is running
6106          * (this can lead to a deadlock), but we need to know
6107          * inum and object type. so we find this information at
6108          * declaration and cache in per-thread info
6109          */
6110         idc = osd_idc_find_or_init(env, osd, fid);
6111         if (IS_ERR(idc))
6112                 RETURN(PTR_ERR(idc));
6113         if (idc->oic_remote) {
6114                 /*
6115                  * a reference to remote inode is represented by an
6116                  * agent inode which we have to create
6117                  */
6118                 credits += osd_dto_credits_noquota[DTO_OBJECT_CREATE];
6119                 credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
6120         }
6121
6122         osd_trans_declare_op(env, oh, OSD_OT_INSERT, credits);
6123
6124         if (osd_dt_obj(dt)->oo_inode != NULL) {
6125                 struct inode *inode = osd_dt_obj(dt)->oo_inode;
6126
6127                 /*
6128                  * We ignore block quota on meta pool (MDTs), so needn't
6129                  * calculate how many blocks will be consumed by this index
6130                  * insert
6131                  */
6132                 rc = osd_declare_inode_qid(env, i_uid_read(inode),
6133                                            i_gid_read(inode),
6134                                            i_projid_read(inode), 0,
6135                                            oh, osd_dt_obj(dt), NULL,
6136                                            OSD_QID_BLK);
6137                 if (rc)
6138                         RETURN(rc);
6139
6140 #ifdef HAVE_PROJECT_QUOTA
6141                 /*
6142                  * Reserve credits for local agent inode to transfer
6143                  * to 0, quota enforcement is ignored in this case.
6144                  */
6145                 if (idc->oic_remote &&
6146                     LDISKFS_I(inode)->i_flags & LUSTRE_PROJINHERIT_FL &&
6147                     i_projid_read(inode) != 0)
6148                         rc = osd_declare_attr_qid(env, osd_dt_obj(dt), oh,
6149                                                   0, i_projid_read(inode),
6150                                                   0, false, PRJQUOTA, true);
6151 #endif
6152         }
6153
6154         RETURN(rc);
6155 }
6156
6157 /**
6158  * Index add function for interoperability mode (b11826).
6159  * It will add the directory entry.This entry is needed to
6160  * maintain name->fid mapping.
6161  *
6162  * \param key it is key i.e. file entry to be inserted
6163  * \param rec it is value of given key i.e. fid
6164  *
6165  * \retval   0, on success
6166  * \retval -ve, on error
6167  */
6168 static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
6169                                const struct dt_rec *rec,
6170                                const struct dt_key *key, struct thandle *th)
6171 {
6172         struct osd_object *obj = osd_dt_obj(dt);
6173         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
6174         struct dt_insert_rec *rec1 = (struct dt_insert_rec *)rec;
6175         const struct lu_fid *fid = rec1->rec_fid;
6176         const char *name = (const char *)key;
6177         struct osd_thread_info *oti = osd_oti_get(env);
6178         struct inode *child_inode = NULL;
6179         struct osd_idmap_cache *idc;
6180         int rc;
6181
6182         ENTRY;
6183
6184         if (!dt_object_exists(dt))
6185                 RETURN(-ENOENT);
6186
6187         LASSERT(osd_invariant(obj));
6188         LASSERT(!dt_object_remote(dt));
6189         LASSERT(th != NULL);
6190
6191         osd_trans_exec_op(env, th, OSD_OT_INSERT);
6192
6193         LASSERTF(fid_is_sane(fid), "fid"DFID" is insane!\n", PFID(fid));
6194
6195         idc = osd_idc_find(env, osd, fid);
6196         if (unlikely(idc == NULL)) {
6197                 idc = osd_idc_find_or_init(env, osd, fid);
6198                 if (IS_ERR(idc)) {
6199                         /*
6200                          * this dt_insert() wasn't declared properly, so
6201                          * FID is missing in OI cache. we better do not
6202                          * lookup FID in FLDB/OI and don't risk to deadlock,
6203                          * but in some special cases (lfsck testing, etc)
6204                          * it's much simpler than fixing a caller.
6205                          *
6206                          * normally this error should be placed after the first
6207                          * find, but migrate may attach source stripes to
6208                          * target, which doesn't create stripes.
6209                          */
6210                         CERROR("%s: "DFID" wasn't declared for insert\n",
6211                                osd_name(osd), PFID(fid));
6212                         dump_stack();
6213                         RETURN(PTR_ERR(idc));
6214                 }
6215         }
6216
6217         if (idc->oic_remote) {
6218                 /* Insert remote entry */
6219                 if (strcmp(name, dotdot) == 0 && strlen(name) == 2) {
6220                         child_inode =
6221                         igrab(osd->od_mdt_map->omm_remote_parent->d_inode);
6222                 } else {
6223                         child_inode = osd_create_local_agent_inode(env, osd,
6224                                         obj, fid, rec1->rec_type & S_IFMT, th);
6225                         if (IS_ERR(child_inode))
6226                                 RETURN(PTR_ERR(child_inode));
6227                 }
6228         } else {
6229                 /* Insert local entry */
6230                 if (unlikely(idc->oic_lid.oii_ino == 0)) {
6231                         /* for a reason OI cache wasn't filled properly */
6232                         CERROR("%s: OIC for "DFID" isn't filled\n",
6233                                osd_name(osd), PFID(fid));
6234                         RETURN(-EINVAL);
6235                 }
6236                 child_inode = oti->oti_inode;
6237                 if (unlikely(child_inode == NULL)) {
6238                         struct ldiskfs_inode_info *lii;
6239
6240                         OBD_ALLOC_PTR(lii);
6241                         if (lii == NULL)
6242                                 RETURN(-ENOMEM);
6243                         child_inode = oti->oti_inode = &lii->vfs_inode;
6244                 }
6245                 child_inode->i_sb = osd_sb(osd);
6246                 child_inode->i_ino = idc->oic_lid.oii_ino;
6247                 child_inode->i_mode = rec1->rec_type & S_IFMT;
6248         }
6249
6250         rc = osd_ea_add_rec(env, obj, child_inode, name, fid, th);
6251
6252         CDEBUG(D_INODE, "parent %lu insert %s:%lu rc = %d\n",
6253                obj->oo_inode->i_ino, name, child_inode->i_ino, rc);
6254
6255         if (child_inode && child_inode != oti->oti_inode)
6256                 iput(child_inode);
6257         LASSERT(osd_invariant(obj));
6258         osd_trans_exec_check(env, th, OSD_OT_INSERT);
6259
6260         RETURN(rc);
6261 }
6262
6263 /**
6264  *  Initialize osd Iterator for given osd index object.
6265  *
6266  *  \param  dt      osd index object
6267  */
6268
6269 static struct dt_it *osd_it_iam_init(const struct lu_env *env,
6270                                      struct dt_object *dt,
6271                                      __u32 unused)
6272 {
6273         struct osd_it_iam *it;
6274         struct osd_object *obj = osd_dt_obj(dt);
6275         struct lu_object *lo = &dt->do_lu;
6276         struct iam_path_descr *ipd;
6277         struct iam_container *bag = &obj->oo_dir->od_container;
6278
6279         if (!dt_object_exists(dt))
6280                 return ERR_PTR(-ENOENT);
6281
6282         OBD_ALLOC_PTR(it);
6283         if (it == NULL)
6284                 return ERR_PTR(-ENOMEM);
6285
6286         ipd = osd_it_ipd_get(env, bag);
6287         if (likely(ipd != NULL)) {
6288                 it->oi_obj = obj;
6289                 it->oi_ipd = ipd;
6290                 lu_object_get(lo);
6291                 iam_it_init(&it->oi_it, bag, IAM_IT_MOVE, ipd);
6292                 return (struct dt_it *)it;
6293         } else {
6294                 OBD_FREE_PTR(it);
6295                 return ERR_PTR(-ENOMEM);
6296         }
6297 }
6298
6299 /**
6300  * free given Iterator.
6301  */
6302 static void osd_it_iam_fini(const struct lu_env *env, struct dt_it *di)
6303 {
6304         struct osd_it_iam *it  = (struct osd_it_iam *)di;
6305         struct osd_object *obj = it->oi_obj;
6306
6307         iam_it_fini(&it->oi_it);
6308         osd_ipd_put(env, &obj->oo_dir->od_container, it->oi_ipd);
6309         osd_object_put(env, obj);
6310         OBD_FREE_PTR(it);
6311 }
6312
6313 /**
6314  *  Move Iterator to record specified by \a key
6315  *
6316  *  \param  di      osd iterator
6317  *  \param  key     key for index
6318  *
6319  *  \retval +ve  di points to record with least key not larger than key
6320  *  \retval  0   di points to exact matched key
6321  *  \retval -ve  failure
6322  */
6323
6324 static int osd_it_iam_get(const struct lu_env *env,
6325                           struct dt_it *di, const struct dt_key *key)
6326 {
6327         struct osd_thread_info *oti = osd_oti_get(env);
6328         struct osd_it_iam *it = (struct osd_it_iam *)di;
6329
6330         if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
6331                 /* swab quota uid/gid */
6332                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
6333                 key = (struct dt_key *)&oti->oti_quota_id;
6334         }
6335
6336         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
6337 }
6338
6339 /**
6340  *  Release Iterator
6341  *
6342  *  \param  di      osd iterator
6343  */
6344 static void osd_it_iam_put(const struct lu_env *env, struct dt_it *di)
6345 {
6346         struct osd_it_iam *it = (struct osd_it_iam *)di;
6347
6348         iam_it_put(&it->oi_it);
6349 }
6350
6351 /**
6352  *  Move iterator by one record
6353  *
6354  *  \param  di      osd iterator
6355  *
6356  *  \retval +1   end of container reached
6357  *  \retval  0   success
6358  *  \retval -ve  failure
6359  */
6360
6361 static int osd_it_iam_next(const struct lu_env *env, struct dt_it *di)
6362 {
6363         struct osd_it_iam *it = (struct osd_it_iam *)di;
6364
6365         return iam_it_next(&it->oi_it);
6366 }
6367
6368 /**
6369  * Return pointer to the key under iterator.
6370  */
6371
6372 static struct dt_key *osd_it_iam_key(const struct lu_env *env,
6373                                      const struct dt_it *di)
6374 {
6375         struct osd_thread_info *oti = osd_oti_get(env);
6376         struct osd_it_iam *it = (struct osd_it_iam *)di;
6377         struct osd_object *obj = it->oi_obj;
6378         struct dt_key *key;
6379
6380         key = (struct dt_key *)iam_it_key_get(&it->oi_it);
6381
6382         if (!IS_ERR(key) && fid_is_quota(lu_object_fid(&obj->oo_dt.do_lu))) {
6383                 /* swab quota uid/gid */
6384                 oti->oti_quota_id = le64_to_cpu(*((__u64 *)key));
6385                 key = (struct dt_key *)&oti->oti_quota_id;
6386         }
6387
6388         return key;
6389 }
6390
6391 /**
6392  * Return size of key under iterator (in bytes)
6393  */
6394
6395 static int osd_it_iam_key_size(const struct lu_env *env, const struct dt_it *di)
6396 {
6397         struct osd_it_iam *it = (struct osd_it_iam *)di;
6398
6399         return iam_it_key_size(&it->oi_it);
6400 }
6401
6402 static inline void
6403 osd_it_append_attrs(struct lu_dirent *ent, int len, __u16 type)
6404 {
6405         /* check if file type is required */
6406         if (ent->lde_attrs & LUDA_TYPE) {
6407                 struct luda_type *lt;
6408                 int align = sizeof(*lt) - 1;
6409
6410                 len = (len + align) & ~align;
6411                 lt = (struct luda_type *)(ent->lde_name + len);
6412                 lt->lt_type = cpu_to_le16(DTTOIF(type));
6413         }
6414
6415         ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
6416 }
6417
6418 /**
6419  * build lu direct from backend fs dirent.
6420  */
6421
6422 static inline void
6423 osd_it_pack_dirent(struct lu_dirent *ent, struct lu_fid *fid, __u64 offset,
6424                    char *name, __u16 namelen, __u16 type, __u32 attr)
6425 {
6426         ent->lde_attrs = attr | LUDA_FID;
6427         fid_cpu_to_le(&ent->lde_fid, fid);
6428
6429         ent->lde_hash = cpu_to_le64(offset);
6430         ent->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
6431
6432         strncpy(ent->lde_name, name, namelen);
6433         ent->lde_name[namelen] = '\0';
6434         ent->lde_namelen = cpu_to_le16(namelen);
6435
6436         /* append lustre attributes */
6437         osd_it_append_attrs(ent, namelen, type);
6438 }
6439
6440 /**
6441  * Return pointer to the record under iterator.
6442  */
6443 static int osd_it_iam_rec(const struct lu_env *env,
6444                           const struct dt_it *di,
6445                           struct dt_rec *dtrec, __u32 attr)
6446 {
6447         struct osd_it_iam *it = (struct osd_it_iam *)di;
6448         struct osd_thread_info *info = osd_oti_get(env);
6449
6450         ENTRY;
6451
6452         if (S_ISDIR(it->oi_obj->oo_inode->i_mode)) {
6453                 const struct osd_fid_pack *rec;
6454                 struct lu_fid *fid = &info->oti_fid;
6455                 struct lu_dirent *lde = (struct lu_dirent *)dtrec;
6456                 char *name;
6457                 int namelen;
6458                 __u64 hash;
6459                 int rc;
6460
6461                 name = (char *)iam_it_key_get(&it->oi_it);
6462                 if (IS_ERR(name))
6463                         RETURN(PTR_ERR(name));
6464
6465                 namelen = iam_it_key_size(&it->oi_it);
6466
6467                 rec = (const struct osd_fid_pack *)iam_it_rec_get(&it->oi_it);
6468                 if (IS_ERR(rec))
6469                         RETURN(PTR_ERR(rec));
6470
6471                 rc = osd_fid_unpack(fid, rec);
6472                 if (rc)
6473                         RETURN(rc);
6474
6475                 hash = iam_it_store(&it->oi_it);
6476
6477                 /* IAM does not store object type in IAM index (dir) */
6478                 osd_it_pack_dirent(lde, fid, hash, name, namelen,
6479                                    0, LUDA_FID);
6480         } else if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
6481                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
6482                            (struct iam_rec *)dtrec);
6483                 osd_quota_unpack(it->oi_obj, dtrec);
6484         } else {
6485                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
6486                            (struct iam_rec *)dtrec);
6487         }
6488
6489         RETURN(0);
6490 }
6491
6492 /**
6493  * Returns cookie for current Iterator position.
6494  */
6495 static __u64 osd_it_iam_store(const struct lu_env *env, const struct dt_it *di)
6496 {
6497         struct osd_it_iam *it = (struct osd_it_iam *)di;
6498
6499         return iam_it_store(&it->oi_it);
6500 }
6501
6502 /**
6503  * Restore iterator from cookie.
6504  *
6505  * \param  di      osd iterator
6506  * \param  hash    Iterator location cookie
6507  *
6508  * \retval +ve  di points to record with least key not larger than key.
6509  * \retval  0   di points to exact matched key
6510  * \retval -ve  failure
6511  */
6512
6513 static int osd_it_iam_load(const struct lu_env *env,
6514                            const struct dt_it *di, __u64 hash)
6515 {
6516         struct osd_it_iam *it = (struct osd_it_iam *)di;
6517
6518         return iam_it_load(&it->oi_it, hash);
6519 }
6520
6521 static const struct dt_index_operations osd_index_iam_ops = {
6522         .dio_lookup         = osd_index_iam_lookup,
6523         .dio_declare_insert = osd_index_declare_iam_insert,
6524         .dio_insert         = osd_index_iam_insert,
6525         .dio_declare_delete = osd_index_declare_iam_delete,
6526         .dio_delete         = osd_index_iam_delete,
6527         .dio_it     = {
6528                 .init     = osd_it_iam_init,
6529                 .fini     = osd_it_iam_fini,
6530                 .get      = osd_it_iam_get,
6531                 .put      = osd_it_iam_put,
6532                 .next     = osd_it_iam_next,
6533                 .key      = osd_it_iam_key,
6534                 .key_size = osd_it_iam_key_size,
6535                 .rec      = osd_it_iam_rec,
6536                 .store    = osd_it_iam_store,
6537                 .load     = osd_it_iam_load
6538         }
6539 };
6540
6541
6542 /**
6543  * Creates or initializes iterator context.
6544  *
6545  * \retval struct osd_it_ea, iterator structure on success
6546  *
6547  */
6548 static struct dt_it *osd_it_ea_init(const struct lu_env *env,
6549                                     struct dt_object *dt,
6550                                     __u32 attr)
6551 {
6552         struct osd_object *obj = osd_dt_obj(dt);
6553         struct osd_thread_info *info = osd_oti_get(env);
6554         struct osd_it_ea *oie;
6555         struct file *file;
6556         struct lu_object *lo = &dt->do_lu;
6557         struct dentry *obj_dentry;
6558
6559         ENTRY;
6560
6561         if (!dt_object_exists(dt) || obj->oo_destroyed)
6562                 RETURN(ERR_PTR(-ENOENT));
6563
6564         OBD_SLAB_ALLOC_PTR_GFP(oie, osd_itea_cachep, GFP_NOFS);
6565         if (oie == NULL)
6566                 RETURN(ERR_PTR(-ENOMEM));
6567         obj_dentry = &oie->oie_dentry;
6568
6569         obj_dentry->d_inode = obj->oo_inode;
6570         obj_dentry->d_sb = osd_sb(osd_obj2dev(obj));
6571         obj_dentry->d_name.hash = 0;
6572
6573         oie->oie_rd_dirent       = 0;
6574         oie->oie_it_dirent       = 0;
6575         oie->oie_dirent          = NULL;
6576         if (unlikely(!info->oti_it_ea_buf_used)) {
6577                 oie->oie_buf = info->oti_it_ea_buf;
6578                 info->oti_it_ea_buf_used = 1;
6579         } else {
6580                 OBD_ALLOC(oie->oie_buf, OSD_IT_EA_BUFSIZE);
6581                 if (oie->oie_buf == NULL)
6582                         RETURN(ERR_PTR(-ENOMEM));
6583         }
6584         oie->oie_obj = obj;
6585
6586         file = &oie->oie_file;
6587
6588         /* Only FMODE_64BITHASH or FMODE_32BITHASH should be set, NOT both. */
6589         if (attr & LUDA_64BITHASH)
6590                 file->f_mode    = FMODE_64BITHASH;
6591         else
6592                 file->f_mode    = FMODE_32BITHASH;
6593         file->f_path.dentry     = obj_dentry;
6594         file->f_mapping         = obj->oo_inode->i_mapping;
6595         file->f_op              = obj->oo_inode->i_fop;
6596         file->f_inode = obj->oo_inode;
6597
6598         lu_object_get(lo);
6599         RETURN((struct dt_it *)oie);
6600 }
6601
6602 /**
6603  * Destroy or finishes iterator context.
6604  *
6605  * \param di iterator structure to be destroyed
6606  */
6607 static void osd_it_ea_fini(const struct lu_env *env, struct dt_it *di)
6608 {
6609         struct osd_thread_info *info = osd_oti_get(env);
6610         struct osd_it_ea *oie = (struct osd_it_ea *)di;
6611         struct osd_object *obj = oie->oie_obj;
6612         struct inode *inode = obj->oo_inode;
6613
6614         ENTRY;
6615         oie->oie_file.f_op->release(inode, &oie->oie_file);
6616         osd_object_put(env, obj);
6617         if (unlikely(oie->oie_buf != info->oti_it_ea_buf))
6618                 OBD_FREE(oie->oie_buf, OSD_IT_EA_BUFSIZE);
6619         else
6620                 info->oti_it_ea_buf_used = 0;
6621         OBD_SLAB_FREE_PTR(oie, osd_itea_cachep);
6622         EXIT;
6623 }
6624
6625 /**
6626  * It position the iterator at given key, so that next lookup continues from
6627  * that key Or it is similar to dio_it->load() but based on a key,
6628  * rather than file position.
6629  *
6630  * As a special convention, osd_it_ea_get(env, di, "") has to rewind iterator
6631  * to the beginning.
6632  *
6633  * TODO: Presently return +1 considering it is only used by mdd_dir_is_empty().
6634  */
6635 static int osd_it_ea_get(const struct lu_env *env,
6636                          struct dt_it *di, const struct dt_key *key)
6637 {
6638         struct osd_it_ea *it = (struct osd_it_ea *)di;
6639
6640         ENTRY;
6641         LASSERT(((const char *)key)[0] == '\0');
6642         it->oie_file.f_pos = 0;
6643         it->oie_rd_dirent = 0;
6644         it->oie_it_dirent = 0;
6645         it->oie_dirent = NULL;
6646
6647         RETURN(+1);
6648 }
6649
6650 /**
6651  * Does nothing
6652  */
6653 static void osd_it_ea_put(const struct lu_env *env, struct dt_it *di)
6654 {
6655 }
6656
6657 struct osd_filldir_cbs {
6658         struct dir_context ctx;
6659         struct osd_it_ea  *it;
6660 };
6661 /**
6662  * It is called internally by ->iterate*(). It fills the
6663  * iterator's in-memory data structure with required
6664  * information i.e. name, namelen, rec_size etc.
6665  *
6666  * \param buf in which information to be filled in.
6667  * \param name name of the file in given dir
6668  *
6669  * \retval 0 on success
6670  * \retval 1 on buffer full
6671  */
6672 #ifdef HAVE_FILLDIR_USE_CTX
6673 static int osd_ldiskfs_filldir(struct dir_context *buf,
6674 #else
6675 static int osd_ldiskfs_filldir(void *buf,
6676 #endif
6677                                const char *name, int namelen,
6678                                loff_t offset, __u64 ino, unsigned int d_type)
6679 {
6680         struct osd_it_ea *it = ((struct osd_filldir_cbs *)buf)->it;
6681         struct osd_object *obj = it->oie_obj;
6682         struct osd_it_ea_dirent *ent = it->oie_dirent;
6683         struct lu_fid *fid = &ent->oied_fid;
6684         struct osd_fid_pack *rec;
6685
6686         ENTRY;
6687
6688 /* this should never happen */
6689         if (unlikely(namelen == 0 || namelen > LDISKFS_NAME_LEN)) {
6690                 CERROR("ldiskfs return invalid namelen %d\n", namelen);
6691                 RETURN(-EIO);
6692         }
6693
6694         if ((void *)ent - it->oie_buf + sizeof(*ent) + namelen >
6695             OSD_IT_EA_BUFSIZE)
6696                 RETURN(1);
6697
6698         /* "." is just the object itself. */
6699         if (namelen == 1 && name[0] == '.') {
6700                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
6701         } else if (d_type & LDISKFS_DIRENT_LUFID) {
6702                 rec = (struct osd_fid_pack *)(name + namelen + 1);
6703                 if (osd_fid_unpack(fid, rec) != 0)
6704                         fid_zero(fid);
6705         } else {
6706                 fid_zero(fid);
6707         }
6708         d_type &= ~LDISKFS_DIRENT_LUFID;
6709
6710         /* NOT export local root. */
6711         if (unlikely(osd_sb(osd_obj2dev(obj))->s_root->d_inode->i_ino == ino)) {
6712                 ino = obj->oo_inode->i_ino;
6713                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
6714         }
6715
6716         ent->oied_ino     = ino;
6717         ent->oied_off     = offset;
6718         ent->oied_namelen = namelen;
6719         ent->oied_type    = d_type;
6720
6721         memcpy(ent->oied_name, name, namelen);
6722
6723         it->oie_rd_dirent++;
6724         it->oie_dirent = (void *)ent + cfs_size_round(sizeof(*ent) + namelen);
6725         RETURN(0);
6726 }
6727
6728 /**
6729  * Calls ->iterate*() to load a directory entry at a time
6730  * and stored it in iterator's in-memory data structure.
6731  *
6732  * \param di iterator's in memory structure
6733  *
6734  * \retval   0 on success
6735  * \retval -ve on error
6736  * \retval +1 reach the end of entry
6737  */
6738 static int osd_ldiskfs_it_fill(const struct lu_env *env,
6739                                const struct dt_it *di)
6740 {
6741         struct osd_it_ea *it = (struct osd_it_ea *)di;
6742         struct osd_object *obj = it->oie_obj;
6743         struct inode *inode = obj->oo_inode;
6744         struct htree_lock *hlock = NULL;
6745         struct file *filp = &it->oie_file;
6746         int rc = 0;
6747         struct osd_filldir_cbs buf = {
6748                 .ctx.actor = osd_ldiskfs_filldir,
6749                 .it = it
6750         };
6751
6752         ENTRY;
6753         it->oie_dirent = it->oie_buf;
6754         it->oie_rd_dirent = 0;
6755
6756         if (obj->oo_hl_head != NULL) {
6757                 hlock = osd_oti_get(env)->oti_hlock;
6758                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
6759                                    inode, LDISKFS_HLOCK_READDIR);
6760         } else {
6761                 down_read(&obj->oo_ext_idx_sem);
6762         }
6763
6764         filp->f_cred = current_cred();
6765         rc = osd_security_file_alloc(filp);
6766         if (rc)
6767                 GOTO(unlock, rc);
6768
6769         filp->f_flags |= O_NOATIME;
6770         filp->f_mode |= FMODE_NONOTIFY;
6771         rc = iterate_dir(filp, &buf.ctx);
6772         if (rc)
6773                 GOTO(unlock, rc);
6774
6775         if (it->oie_rd_dirent == 0) {
6776                 /*
6777                  * If it does not get any dirent, it means it has been reached
6778                  * to the end of the dir
6779                  */
6780                 it->oie_file.f_pos = ldiskfs_get_htree_eof(&it->oie_file);
6781                 if (rc == 0)
6782                         rc = 1;
6783         } else {
6784                 it->oie_dirent = it->oie_buf;
6785                 it->oie_it_dirent = 1;
6786         }
6787 unlock:
6788         if (hlock != NULL)
6789                 ldiskfs_htree_unlock(hlock);
6790         else
6791                 up_read(&obj->oo_ext_idx_sem);
6792
6793         RETURN(rc);
6794 }
6795
6796 /**
6797  * It calls osd_ldiskfs_it_fill() which will use ->iterate*()
6798  * to load a directory entry at a time and stored it in
6799  * iterator's in-memory data structure.
6800  *
6801  * \param di iterator's in memory structure
6802  *
6803  * \retval +ve iterator reached to end
6804  * \retval   0 iterator not reached to end
6805  * \retval -ve on error
6806  */
6807 static int osd_it_ea_next(const struct lu_env *env, struct dt_it *di)
6808 {
6809         struct osd_it_ea *it = (struct osd_it_ea *)di;
6810         int rc;
6811
6812         ENTRY;
6813
6814         if (it->oie_it_dirent < it->oie_rd_dirent) {
6815                 it->oie_dirent =
6816                         (void *)it->oie_dirent +
6817                         cfs_size_round(sizeof(struct osd_it_ea_dirent) +
6818                                        it->oie_dirent->oied_namelen);
6819                 it->oie_it_dirent++;
6820                 rc = 0;
6821         } else {
6822                 if (it->oie_file.f_pos == ldiskfs_get_htree_eof(&it->oie_file))
6823                         rc = 1;
6824                 else
6825                         rc = osd_ldiskfs_it_fill(env, di);
6826         }
6827
6828         RETURN(rc);
6829 }
6830
6831 /**
6832  * Returns the key at current position from iterator's in memory structure.
6833  *
6834  * \param di iterator's in memory structure
6835  *
6836  * \retval key i.e. struct dt_key on success
6837  */
6838 static struct dt_key *osd_it_ea_key(const struct lu_env *env,
6839                                     const struct dt_it *di)
6840 {
6841         struct osd_it_ea *it = (struct osd_it_ea *)di;
6842
6843         return (struct dt_key *)it->oie_dirent->oied_name;
6844 }
6845
6846 /**
6847  * Returns key's size at current position from iterator's in memory structure.
6848  *
6849  * \param di iterator's in memory structure
6850  *
6851  * \retval key_size i.e. struct dt_key on success
6852  */
6853 static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
6854 {
6855         struct osd_it_ea *it = (struct osd_it_ea *)di;
6856
6857         return it->oie_dirent->oied_namelen;
6858 }
6859
6860 #if defined LDISKFS_DIR_ENTRY_LEN && defined LDISKFS_DIR_ENTRY_LEN_
6861 #undef LDISKFS_DIR_REC_LEN
6862 #define LDISKFS_DIR_REC_LEN(de)         LDISKFS_DIR_ENTRY_LEN_((de))
6863 #endif
6864
6865 static inline bool osd_dotdot_has_space(struct ldiskfs_dir_entry_2 *de)
6866 {
6867         if (LDISKFS_DIR_REC_LEN(de) >=
6868             __LDISKFS_DIR_REC_LEN(2 + 1 + sizeof(struct osd_fid_pack)))
6869                 return true;
6870
6871         return false;
6872 }
6873
6874 static inline bool
6875 osd_dirent_has_space(struct ldiskfs_dir_entry_2 *de, __u16 namelen,
6876                      unsigned int blocksize, bool dotdot)
6877 {
6878         if (dotdot)
6879                 return osd_dotdot_has_space(de);
6880
6881         if (ldiskfs_rec_len_from_disk(de->rec_len, blocksize) >=
6882             __LDISKFS_DIR_REC_LEN(namelen + 1 + sizeof(struct osd_fid_pack)))
6883                 return true;
6884
6885         return false;
6886 }
6887
6888 static int
6889 osd_dirent_reinsert(const struct lu_env *env, struct osd_device *dev,
6890                     handle_t *jh, struct dentry *dentry,
6891                     const struct lu_fid *fid, struct buffer_head *bh,
6892                     struct ldiskfs_dir_entry_2 *de, struct htree_lock *hlock,
6893                     bool dotdot)
6894 {
6895         struct inode *dir = dentry->d_parent->d_inode;
6896         struct inode *inode = dentry->d_inode;
6897         struct osd_fid_pack *rec;
6898         struct ldiskfs_dentry_param *ldp;
6899         int namelen = dentry->d_name.len;
6900         int rc;
6901         struct osd_thread_info *info = osd_oti_get(env);
6902
6903         ENTRY;
6904
6905         if (!ldiskfs_has_feature_dirdata(inode->i_sb))
6906                 RETURN(0);
6907
6908         /* There is enough space to hold the FID-in-dirent. */
6909         if (osd_dirent_has_space(de, namelen, dir->i_sb->s_blocksize, dotdot)) {
6910                 rc = ldiskfs_journal_get_write_access(jh, bh);
6911                 if (rc != 0)
6912                         RETURN(rc);
6913
6914                 de->name[namelen] = 0;
6915                 rec = (struct osd_fid_pack *)(de->name + namelen + 1);
6916                 rec->fp_len = sizeof(struct lu_fid) + 1;
6917                 fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
6918                 de->file_type |= LDISKFS_DIRENT_LUFID;
6919                 rc = ldiskfs_handle_dirty_metadata(jh, NULL, bh);
6920
6921                 RETURN(rc);
6922         }
6923
6924         LASSERT(!dotdot);
6925
6926         rc = ldiskfs_delete_entry(jh, dir, de, bh);
6927         if (rc != 0)
6928                 RETURN(rc);
6929
6930         ldp = (struct ldiskfs_dentry_param *)osd_oti_get(env)->oti_ldp;
6931         osd_get_ldiskfs_dirent_param(ldp, fid);
6932         dentry->d_fsdata = (void *)ldp;
6933         dquot_initialize(dir);
6934         rc = osd_ldiskfs_add_entry(info, dev, jh, dentry, inode, hlock);
6935         /*
6936          * It is too bad, we cannot reinsert the name entry back.
6937          * That means we lose it!
6938          */
6939         if (rc != 0)
6940                 CDEBUG(D_LFSCK,
6941                        "%s: fail to reinsert the dirent, dir = %lu/%u, name = %.*s, "DFID": rc = %d\n",
6942                        osd_ino2name(inode), dir->i_ino, dir->i_generation,
6943                        namelen, dentry->d_name.name, PFID(fid), rc);
6944
6945         RETURN(rc);
6946 }
6947
6948 static int
6949 osd_dirent_check_repair(const struct lu_env *env, struct osd_object *obj,
6950                         struct osd_it_ea *it, struct lu_fid *fid,
6951                         struct osd_inode_id *id, __u32 *attr)
6952 {
6953         struct osd_thread_info *info = osd_oti_get(env);
6954         struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
6955         struct osd_device *dev = osd_obj2dev(obj);
6956         struct super_block *sb = osd_sb(dev);
6957         const char *devname = osd_name(dev);
6958         struct osd_it_ea_dirent *ent = it->oie_dirent;
6959         struct inode *dir = obj->oo_inode;
6960         struct htree_lock *hlock = NULL;
6961         struct buffer_head *bh = NULL;
6962         handle_t *jh = NULL;
6963         struct ldiskfs_dir_entry_2 *de;
6964         struct dentry *dentry;
6965         struct inode *inode;
6966         const struct lu_fid *pfid = lu_object_fid(&obj->oo_dt.do_lu);
6967         int credits;
6968         int rc;
6969         bool dotdot = false;
6970         bool dirty = false;
6971
6972         ENTRY;
6973
6974         if (ent->oied_name[0] == '.') {
6975                 if (ent->oied_namelen == 1)
6976                         RETURN(0);
6977
6978                 if (ent->oied_namelen == 2 && ent->oied_name[1] == '.')
6979                         dotdot = true;
6980         }
6981
6982         osd_id_gen(id, ent->oied_ino, OSD_OII_NOGEN);
6983         inode = osd_iget(info, dev, id);
6984         if (IS_ERR(inode)) {
6985                 rc = PTR_ERR(inode);
6986                 if (rc == -ENOENT || rc == -ESTALE) {
6987                         /*
6988                          * Maybe dangling name entry, or
6989                          * corrupted directory entry.
6990                          */
6991                         *attr |= LUDA_UNKNOWN;
6992                         rc = 0;
6993                 } else {
6994                         CDEBUG(D_LFSCK, "%s: fail to iget() for dirent "
6995                                "check_repair, dir = %lu/%u, name = %.*s, "
6996                                "ino = %llu, rc = %d\n",
6997                                devname, dir->i_ino, dir->i_generation,
6998                                ent->oied_namelen, ent->oied_name,
6999                                ent->oied_ino, rc);
7000                 }
7001
7002                 RETURN(rc);
7003         }
7004
7005         dentry = osd_child_dentry_by_inode(env, dir, ent->oied_name,
7006                                            ent->oied_namelen);
7007         rc = osd_get_lma(info, inode, dentry, &info->oti_ost_attrs);
7008         if (rc == -ENODATA || !fid_is_sane(&lma->lma_self_fid))
7009                 lma = NULL;
7010         else if (rc != 0)
7011                 GOTO(out, rc);
7012
7013         /*
7014          * We need to ensure that the name entry is still valid.
7015          * Because it may be removed or renamed by other already.
7016          *
7017          * The unlink or rename operation will start journal before PDO lock,
7018          * so to avoid deadlock, here we need to start journal handle before
7019          * related PDO lock also. But because we do not know whether there
7020          * will be something to be repaired before PDO lock, we just start
7021          * journal without conditions.
7022          *
7023          * We may need to remove the name entry firstly, then insert back.
7024          * One credit is for user quota file update.
7025          * One credit is for group quota file update.
7026          * Two credits are for dirty inode.
7027          */
7028         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE] +
7029                   osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1 + 1 + 2;
7030
7031         if (dev->od_dirent_journal != 0) {
7032
7033 again:
7034                 jh = osd_journal_start_sb(sb, LDISKFS_HT_MISC, credits);
7035                 if (IS_ERR(jh)) {
7036                         rc = PTR_ERR(jh);
7037                         CDEBUG(D_LFSCK, "%s: fail to start trans for dirent "
7038                                "check_repair, dir = %lu/%u, credits = %d, "
7039                                "name = %.*s, ino = %llu: rc = %d\n",
7040                                devname, dir->i_ino, dir->i_generation, credits,
7041                                ent->oied_namelen, ent->oied_name,
7042                                ent->oied_ino, rc);
7043
7044                         GOTO(out_inode, rc);
7045                 }
7046
7047                 if (obj->oo_hl_head != NULL) {
7048                         hlock = osd_oti_get(env)->oti_hlock;
7049                         /*
7050                          * "0" means exclusive lock for the whole directory.
7051                          * We need to prevent others access such name entry
7052                          * during the delete + insert. Neither HLOCK_ADD nor
7053                          * HLOCK_DEL cannot guarantee the atomicity.
7054                          */
7055                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir, 0);
7056                 } else {
7057                         down_write(&obj->oo_ext_idx_sem);
7058                 }
7059         } else {
7060                 if (obj->oo_hl_head != NULL) {
7061                         hlock = osd_oti_get(env)->oti_hlock;
7062                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir,
7063                                            LDISKFS_HLOCK_LOOKUP);
7064                 } else {
7065                         down_read(&obj->oo_ext_idx_sem);
7066                 }
7067         }
7068
7069         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
7070         if (IS_ERR(bh) || le32_to_cpu(de->inode) != inode->i_ino) {
7071                 *attr |= LUDA_IGNORE;
7072
7073                 GOTO(out, rc = 0);
7074         }
7075
7076         /*
7077          * For dotdot entry, if there is not enough space to hold the
7078          * FID-in-dirent, just keep them there. It only happens when the
7079          * device upgraded from 1.8 or restored from MDT file-level backup.
7080          * For the whole directory, only dotdot entry have no FID-in-dirent
7081          * and needs to get FID from LMA when readdir, it will not affect the
7082          * performance much.
7083          */
7084         if (dotdot && !osd_dotdot_has_space(de)) {
7085                 *attr |= LUDA_UNKNOWN;
7086
7087                 GOTO(out, rc = 0);
7088         }
7089
7090         if (lma != NULL) {
7091                 if (lu_fid_eq(fid, &lma->lma_self_fid))
7092                         GOTO(out, rc = 0);
7093
7094                 if (unlikely(lma->lma_compat & LMAC_NOT_IN_OI)) {
7095                         struct lu_fid *tfid = &lma->lma_self_fid;
7096
7097                         if (likely(dotdot &&
7098                                    fid_seq(tfid) == FID_SEQ_LOCAL_FILE &&
7099                                    fid_oid(tfid) == REMOTE_PARENT_DIR_OID)) {
7100                                 /*
7101                                  * It must be REMOTE_PARENT_DIR and as the
7102                                  * 'dotdot' entry of remote directory
7103                                  */
7104                                 *attr |= LUDA_IGNORE;
7105                         } else {
7106                                 CDEBUG(D_LFSCK, "%s: expect remote agent "
7107                                        "parent directory, but got %.*s under "
7108                                        "dir = %lu/%u with the FID "DFID"\n",
7109                                        devname, ent->oied_namelen,
7110                                        ent->oied_name, dir->i_ino,
7111                                        dir->i_generation, PFID(tfid));
7112
7113                                 *attr |= LUDA_UNKNOWN;
7114                         }
7115
7116                         GOTO(out, rc = 0);
7117                 }
7118         }
7119
7120         if (!fid_is_zero(fid)) {
7121                 rc = osd_verify_ent_by_linkea(env, inode, pfid, ent->oied_name,
7122                                               ent->oied_namelen);
7123                 if (rc == -ENOENT ||
7124                     (rc == -ENODATA &&
7125                      !(dev->od_scrub.os_scrub.os_file.sf_flags & SF_UPGRADE))) {
7126                         /*
7127                          * linkEA does not recognize the dirent entry,
7128                          * it may because the dirent entry corruption
7129                          * and points to other's inode.
7130                          */
7131                         CDEBUG(D_LFSCK, "%s: the target inode does not "
7132                                "recognize the dirent, dir = %lu/%u, "
7133                                " name = %.*s, ino = %llu, "
7134                                DFID": rc = %d\n", devname, dir->i_ino,
7135                                dir->i_generation, ent->oied_namelen,
7136                                ent->oied_name, ent->oied_ino, PFID(fid), rc);
7137                         *attr |= LUDA_UNKNOWN;
7138
7139                         GOTO(out, rc = 0);
7140                 }
7141
7142                 if (rc && rc != -ENODATA) {
7143                         CDEBUG(D_LFSCK, "%s: fail to verify FID in the dirent, "
7144                                "dir = %lu/%u, name = %.*s, ino = %llu, "
7145                                DFID": rc = %d\n", devname, dir->i_ino,
7146                                dir->i_generation, ent->oied_namelen,
7147                                ent->oied_name, ent->oied_ino, PFID(fid), rc);
7148                         *attr |= LUDA_UNKNOWN;
7149
7150                         GOTO(out, rc = 0);
7151                 }
7152         }
7153
7154         if (lma != NULL) {
7155                 /*
7156                  * linkEA recognizes the dirent entry, the FID-in-LMA is
7157                  * valid, trusted, in spite of fid_is_sane(fid) or not.
7158                  */
7159                 if (*attr & LUDA_VERIFY_DRYRUN) {
7160                         *fid = lma->lma_self_fid;
7161                         *attr |= LUDA_REPAIR;
7162
7163                         GOTO(out, rc = 0);
7164                 }
7165
7166                 if (jh == NULL) {
7167                         brelse(bh);
7168                         dev->od_dirent_journal = 1;
7169                         if (hlock != NULL) {
7170                                 ldiskfs_htree_unlock(hlock);
7171                                 hlock = NULL;
7172                         } else {
7173                                 up_read(&obj->oo_ext_idx_sem);
7174                         }
7175
7176                         goto again;
7177                 }
7178
7179                 *fid = lma->lma_self_fid;
7180                 dirty = true;
7181                 /* Update or append the FID-in-dirent. */
7182                 rc = osd_dirent_reinsert(env, dev, jh, dentry, fid,
7183                                          bh, de, hlock, dotdot);
7184                 if (rc == 0)
7185                         *attr |= LUDA_REPAIR;
7186                 else
7187                         CDEBUG(D_LFSCK, "%s: fail to re-insert FID after "
7188                                "the dirent, dir = %lu/%u, name = %.*s, "
7189                                "ino = %llu, "DFID": rc = %d\n",
7190                                devname, dir->i_ino, dir->i_generation,
7191                                ent->oied_namelen, ent->oied_name,
7192                                ent->oied_ino, PFID(fid), rc);
7193         } else {
7194                 /* lma is NULL, trust the FID-in-dirent if it is valid. */
7195                 if (*attr & LUDA_VERIFY_DRYRUN) {
7196                         if (fid_is_sane(fid)) {
7197                                 *attr |= LUDA_REPAIR;
7198                         } else if (dev->od_index == 0) {
7199                                 lu_igif_build(fid, inode->i_ino,
7200                                               inode->i_generation);
7201                                 *attr |= LUDA_UPGRADE;
7202                         }
7203
7204                         GOTO(out, rc = 0);
7205                 }
7206
7207                 if (jh == NULL) {
7208                         brelse(bh);
7209                         dev->od_dirent_journal = 1;
7210                         if (hlock != NULL) {
7211                                 ldiskfs_htree_unlock(hlock);
7212                                 hlock = NULL;
7213                         } else {
7214                                 up_read(&obj->oo_ext_idx_sem);
7215                         }
7216
7217                         goto again;
7218                 }
7219
7220                 dirty = true;
7221                 if (unlikely(fid_is_sane(fid))) {
7222                         /*
7223                          * FID-in-dirent exists, but FID-in-LMA is lost.
7224                          * Trust the FID-in-dirent, and add FID-in-LMA.
7225                          */
7226                         rc = osd_ea_fid_set(info, inode, fid, 0, 0);
7227                         if (rc == 0)
7228                                 *attr |= LUDA_REPAIR;
7229                         else
7230                                 CDEBUG(D_LFSCK, "%s: fail to set LMA for "
7231                                        "update dirent, dir = %lu/%u, "
7232                                        "name = %.*s, ino = %llu, "
7233                                        DFID": rc = %d\n",
7234                                        devname, dir->i_ino, dir->i_generation,
7235                                        ent->oied_namelen, ent->oied_name,
7236                                        ent->oied_ino, PFID(fid), rc);
7237                 } else if (dev->od_index == 0) {
7238                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
7239                         /*
7240                          * It is probably IGIF object. Only aappend the
7241                          * FID-in-dirent. OI scrub will process FID-in-LMA.
7242                          */
7243                         rc = osd_dirent_reinsert(env, dev, jh, dentry, fid,
7244                                                  bh, de, hlock, dotdot);
7245                         if (rc == 0)
7246                                 *attr |= LUDA_UPGRADE;
7247                         else
7248                                 CDEBUG(D_LFSCK, "%s: fail to append IGIF "
7249                                        "after the dirent, dir = %lu/%u, "
7250                                        "name = %.*s, ino = %llu, "
7251                                        DFID": rc = %d\n",
7252                                        devname, dir->i_ino, dir->i_generation,
7253                                        ent->oied_namelen, ent->oied_name,
7254                                        ent->oied_ino, PFID(fid), rc);
7255                 }
7256         }
7257
7258         GOTO(out, rc);
7259
7260 out:
7261         if (!IS_ERR(bh))
7262                 brelse(bh);
7263         if (hlock != NULL) {
7264                 ldiskfs_htree_unlock(hlock);
7265         } else {
7266                 if (dev->od_dirent_journal != 0)
7267                         up_write(&obj->oo_ext_idx_sem);
7268                 else
7269                         up_read(&obj->oo_ext_idx_sem);
7270         }
7271
7272         if (jh != NULL)
7273                 ldiskfs_journal_stop(jh);
7274
7275 out_inode:
7276         iput(inode);
7277         if (rc >= 0 && !dirty)
7278                 dev->od_dirent_journal = 0;
7279
7280         return rc;
7281 }
7282
7283 /**
7284  * Returns the value at current position from iterator's in memory structure.
7285  *
7286  * \param di struct osd_it_ea, iterator's in memory structure
7287  * \param attr attr requested for dirent.
7288  * \param lde lustre dirent
7289  *
7290  * \retval   0 no error and \param lde has correct lustre dirent.
7291  * \retval -ve on error
7292  */
7293 static inline int osd_it_ea_rec(const struct lu_env *env,
7294                                 const struct dt_it *di,
7295                                 struct dt_rec *dtrec, __u32 attr)
7296 {
7297         struct osd_it_ea       *it    = (struct osd_it_ea *)di;
7298         struct osd_object      *obj   = it->oie_obj;
7299         struct osd_device      *dev   = osd_obj2dev(obj);
7300         struct osd_thread_info *oti   = osd_oti_get(env);
7301         struct osd_inode_id    *id    = &oti->oti_id;
7302         struct lu_fid          *fid   = &it->oie_dirent->oied_fid;
7303         struct lu_dirent       *lde   = (struct lu_dirent *)dtrec;
7304         __u32 ino = it->oie_dirent->oied_ino;
7305         int rc = 0;
7306
7307         ENTRY;
7308
7309         LASSERT(!is_remote_parent_ino(dev, obj->oo_inode->i_ino));
7310
7311         if (attr & LUDA_VERIFY) {
7312                 if (unlikely(is_remote_parent_ino(dev, ino))) {
7313                         attr |= LUDA_IGNORE;
7314                         /*
7315                          * If the parent is on remote MDT, and there
7316                          * is no FID-in-dirent, then we have to get
7317                          * the parent FID from the linkEA.
7318                          */
7319                         if (!fid_is_sane(fid) &&
7320                             it->oie_dirent->oied_namelen == 2 &&
7321                             it->oie_dirent->oied_name[0] == '.' &&
7322                             it->oie_dirent->oied_name[1] == '.')
7323                                 osd_get_pfid_from_linkea(env, obj, fid);
7324                 } else {
7325                         rc = osd_dirent_check_repair(env, obj, it, fid, id,
7326                                                      &attr);
7327                 }
7328
7329                 if (!fid_is_sane(fid))
7330                         attr |= LUDA_UNKNOWN;
7331         } else {
7332                 attr &= ~LU_DIRENT_ATTRS_MASK;
7333                 if (!fid_is_sane(fid)) {
7334                         bool is_dotdot = false;
7335
7336                         if (it->oie_dirent->oied_namelen == 2 &&
7337                             it->oie_dirent->oied_name[0] == '.' &&
7338                             it->oie_dirent->oied_name[1] == '.')
7339                                 is_dotdot = true;
7340                         /*
7341                          * If the parent is on remote MDT, and there
7342                          * is no FID-in-dirent, then we have to get
7343                          * the parent FID from the linkEA.
7344                          */
7345                         if (is_remote_parent_ino(dev, ino) && is_dotdot) {
7346                                 rc = osd_get_pfid_from_linkea(env, obj, fid);
7347                         } else {
7348                                 if (is_dotdot == false &&
7349                                     OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP))
7350                                         RETURN(-ENOENT);
7351
7352                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
7353                         }
7354                 }
7355         }
7356
7357         /* Pack the entry anyway, at least the offset is right. */
7358         osd_it_pack_dirent(lde, fid, it->oie_dirent->oied_off,
7359                            it->oie_dirent->oied_name,
7360                            it->oie_dirent->oied_namelen,
7361                            it->oie_dirent->oied_type, attr);
7362
7363         RETURN(rc > 0 ? 0 : rc);
7364 }
7365
7366 /**
7367  * Returns the record size size at current position.
7368  *
7369  * This function will return record(lu_dirent) size in bytes.
7370  *
7371  * \param[in] env       execution environment
7372  * \param[in] di        iterator's in memory structure
7373  * \param[in] attr      attribute of the entry, only requires LUDA_TYPE to
7374  *                      calculate the lu_dirent size.
7375  *
7376  * \retval      record size(in bytes & in memory) of the current lu_dirent
7377  *              entry.
7378  */
7379 static int osd_it_ea_rec_size(const struct lu_env *env, const struct dt_it *di,
7380                               __u32 attr)
7381 {
7382         struct osd_it_ea *it = (struct osd_it_ea *)di;
7383
7384         return lu_dirent_calc_size(it->oie_dirent->oied_namelen, attr);
7385 }
7386
7387 /**
7388  * Returns a cookie for current position of the iterator head, so that
7389  * user can use this cookie to load/start the iterator next time.
7390  *
7391  * \param di iterator's in memory structure
7392  *
7393  * \retval cookie for current position, on success
7394  */
7395 static __u64 osd_it_ea_store(const struct lu_env *env, const struct dt_it *di)
7396 {
7397         struct osd_it_ea *it = (struct osd_it_ea *)di;
7398
7399         return it->oie_dirent->oied_off;
7400 }
7401
7402 /**
7403  * It calls osd_ldiskfs_it_fill() which will use ->iterate*()
7404  * to load a directory entry at a time and stored it i inn,
7405  * in iterator's in-memory data structure.
7406  *
7407  * \param di struct osd_it_ea, iterator's in memory structure
7408  *
7409  * \retval +ve on success
7410  * \retval -ve on error
7411  */
7412 static int osd_it_ea_load(const struct lu_env *env,
7413                           const struct dt_it *di, __u64 hash)
7414 {
7415         struct osd_it_ea *it = (struct osd_it_ea *)di;
7416         int rc;
7417
7418         ENTRY;
7419         it->oie_file.f_pos = hash;
7420
7421         rc =  osd_ldiskfs_it_fill(env, di);
7422         if (rc > 0)
7423                 rc = -ENODATA;
7424
7425         if (rc == 0)
7426                 rc = 1;
7427
7428         RETURN(rc);
7429 }
7430
7431 /**
7432  * Index lookup function for interoperability mode (b11826).
7433  *
7434  * \param key,  key i.e. file name to be searched
7435  *
7436  * \retval +ve, on success
7437  * \retval -ve, on error
7438  */
7439 static int osd_index_ea_lookup(const struct lu_env *env, struct dt_object *dt,
7440                                struct dt_rec *rec, const struct dt_key *key)
7441 {
7442         struct osd_object *obj = osd_dt_obj(dt);
7443         int rc = 0;
7444
7445         ENTRY;
7446
7447         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
7448         LINVRNT(osd_invariant(obj));
7449
7450         rc = osd_ea_lookup_rec(env, obj, rec, key);
7451         if (rc == 0)
7452                 rc = 1;
7453         RETURN(rc);
7454 }
7455
7456 /**
7457  * Index and Iterator operations for interoperability
7458  * mode (i.e. to run 2.0 mds on 1.8 disk) (b11826)
7459  */
7460 static const struct dt_index_operations osd_index_ea_ops = {
7461         .dio_lookup         = osd_index_ea_lookup,
7462         .dio_declare_insert = osd_index_declare_ea_insert,
7463         .dio_insert         = osd_index_ea_insert,
7464         .dio_declare_delete = osd_index_declare_ea_delete,
7465         .dio_delete         = osd_index_ea_delete,
7466         .dio_it     = {
7467                 .init     = osd_it_ea_init,
7468                 .fini     = osd_it_ea_fini,
7469                 .get      = osd_it_ea_get,
7470                 .put      = osd_it_ea_put,
7471                 .next     = osd_it_ea_next,
7472                 .key      = osd_it_ea_key,
7473                 .key_size = osd_it_ea_key_size,
7474                 .rec      = osd_it_ea_rec,
7475                 .rec_size = osd_it_ea_rec_size,
7476                 .store    = osd_it_ea_store,
7477                 .load     = osd_it_ea_load
7478         }
7479 };
7480
7481 static void *osd_key_init(const struct lu_context *ctx,
7482                           struct lu_context_key *key)
7483 {
7484         struct osd_thread_info *info;
7485
7486         OBD_ALLOC_PTR(info);
7487         if (info == NULL)
7488                 return ERR_PTR(-ENOMEM);
7489
7490         OBD_ALLOC(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
7491         if (info->oti_it_ea_buf == NULL)
7492                 goto out_free_info;
7493
7494         info->oti_env = container_of(ctx, struct lu_env, le_ctx);
7495
7496         info->oti_hlock = ldiskfs_htree_lock_alloc();
7497         if (info->oti_hlock == NULL)
7498                 goto out_free_ea;
7499
7500         return info;
7501
7502 out_free_ea:
7503         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
7504 out_free_info:
7505         OBD_FREE_PTR(info);
7506         return ERR_PTR(-ENOMEM);
7507 }
7508
7509 static void osd_key_fini(const struct lu_context *ctx,
7510                          struct lu_context_key *key, void *data)
7511 {
7512         struct osd_thread_info *info = data;
7513         struct ldiskfs_inode_info *lli = LDISKFS_I(info->oti_inode);
7514         struct osd_idmap_cache *idc = info->oti_ins_cache;
7515
7516         if (info->oti_dio_pages) {
7517                 int i;
7518                 for (i = 0; i < PTLRPC_MAX_BRW_PAGES; i++) {
7519                         struct page *page = info->oti_dio_pages[i];
7520                         if (page) {
7521                                 LASSERT(PagePrivate2(page));
7522                                 LASSERT(PageLocked(page));
7523                                 ClearPagePrivate2(page);
7524                                 unlock_page(page);
7525                                 __free_page(page);
7526                         }
7527                 }
7528                 OBD_FREE_PTR_ARRAY_LARGE(info->oti_dio_pages,
7529                                          PTLRPC_MAX_BRW_PAGES);
7530         }
7531
7532         if (info->oti_inode != NULL)
7533                 OBD_FREE_PTR(lli);
7534         if (info->oti_hlock != NULL)
7535                 ldiskfs_htree_lock_free(info->oti_hlock);
7536         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
7537         lu_buf_free(&info->oti_iobuf.dr_pg_buf);
7538         lu_buf_free(&info->oti_iobuf.dr_bl_buf);
7539         lu_buf_free(&info->oti_iobuf.dr_lnb_buf);
7540         lu_buf_free(&info->oti_big_buf);
7541         if (idc != NULL) {
7542                 LASSERT(info->oti_ins_cache_size > 0);
7543                 OBD_FREE_PTR_ARRAY(idc, info->oti_ins_cache_size);
7544                 info->oti_ins_cache = NULL;
7545                 info->oti_ins_cache_size = 0;
7546         }
7547         OBD_FREE_PTR(info);
7548 }
7549
7550 static void osd_key_exit(const struct lu_context *ctx,
7551                          struct lu_context_key *key, void *data)
7552 {
7553         struct osd_thread_info *info = data;
7554
7555         LASSERT(info->oti_r_locks == 0);
7556         LASSERT(info->oti_w_locks == 0);
7557         LASSERT(info->oti_txns    == 0);
7558 }
7559
7560 /* type constructor/destructor: osd_type_init, osd_type_fini */
7561 LU_TYPE_INIT_FINI(osd, &osd_key);
7562
7563 struct lu_context_key osd_key = {
7564         .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL,
7565         .lct_init = osd_key_init,
7566         .lct_fini = osd_key_fini,
7567         .lct_exit = osd_key_exit
7568 };
7569
7570
7571 static int osd_device_init(const struct lu_env *env, struct lu_device *d,
7572                            const char *name, struct lu_device *next)
7573 {
7574         struct osd_device *osd = osd_dev(d);
7575
7576         if (strlcpy(osd->od_svname, name, sizeof(osd->od_svname)) >=
7577             sizeof(osd->od_svname))
7578                 return -E2BIG;
7579         return osd_procfs_init(osd, name);
7580 }
7581
7582 static int osd_fid_init(const struct lu_env *env, struct osd_device *osd)
7583 {
7584         struct seq_server_site *ss = osd_seq_site(osd);
7585         int rc = 0;
7586
7587         ENTRY;
7588
7589         if (osd->od_is_ost || osd->od_cl_seq != NULL)
7590                 RETURN(0);
7591
7592         if (unlikely(ss == NULL))
7593                 RETURN(-ENODEV);
7594
7595         OBD_ALLOC_PTR(osd->od_cl_seq);
7596         if (osd->od_cl_seq == NULL)
7597                 RETURN(-ENOMEM);
7598
7599         seq_client_init(osd->od_cl_seq, NULL, LUSTRE_SEQ_METADATA,
7600                         osd->od_svname, ss->ss_server_seq);
7601
7602         if (ss->ss_node_id == 0) {
7603                 /*
7604                  * If the OSD on the sequence controller(MDT0), then allocate
7605                  * sequence here, otherwise allocate sequence after connected
7606                  * to MDT0 (see mdt_register_lwp_callback()).
7607                  */
7608                 rc = seq_server_alloc_meta(osd->od_cl_seq->lcs_srv,
7609                                    &osd->od_cl_seq->lcs_space, env);
7610         }
7611
7612         RETURN(rc);
7613 }
7614
7615 static void osd_fid_fini(const struct lu_env *env, struct osd_device *osd)
7616 {
7617         if (osd->od_cl_seq == NULL)
7618                 return;
7619
7620         seq_client_fini(osd->od_cl_seq);
7621         OBD_FREE_PTR(osd->od_cl_seq);
7622         osd->od_cl_seq = NULL;
7623 }
7624
7625 static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
7626 {
7627         ENTRY;
7628
7629         /* shutdown quota slave instance associated with the device */
7630         if (o->od_quota_slave_md != NULL) {
7631                 struct qsd_instance *qsd = o->od_quota_slave_md;
7632
7633                 o->od_quota_slave_md = NULL;
7634                 qsd_fini(env, qsd);
7635         }
7636
7637         if (o->od_quota_slave_dt != NULL) {
7638                 struct qsd_instance *qsd = o->od_quota_slave_dt;
7639
7640                 o->od_quota_slave_dt = NULL;
7641                 qsd_fini(env, qsd);
7642         }
7643
7644         osd_fid_fini(env, o);
7645         osd_scrub_cleanup(env, o);
7646
7647         RETURN(0);
7648 }
7649
7650 static void osd_umount(const struct lu_env *env, struct osd_device *o)
7651 {
7652         ENTRY;
7653
7654         if (o->od_mnt != NULL) {
7655                 shrink_dcache_sb(osd_sb(o));
7656                 osd_sync(env, &o->od_dt_dev);
7657                 wait_event(o->od_commit_cb_done,
7658                           !atomic_read(&o->od_commit_cb_in_flight));
7659
7660                 mntput(o->od_mnt);
7661                 o->od_mnt = NULL;
7662         }
7663
7664         EXIT;
7665 }
7666
7667 static int osd_mount(const struct lu_env *env,
7668                      struct osd_device *o, struct lustre_cfg *cfg)
7669 {
7670         const char *name = lustre_cfg_string(cfg, 0);
7671         const char *dev = lustre_cfg_string(cfg, 1);
7672         const char *opts;
7673         unsigned long page, s_flags, lmd_flags = 0;
7674         struct page *__page;
7675         struct file_system_type *type;
7676         char *options = NULL;
7677         char *str;
7678         struct osd_thread_info *info = osd_oti_get(env);
7679         struct lu_fid *fid = &info->oti_fid;
7680         struct inode *inode;
7681         int rc = 0, force_over_1024tb = 0;
7682
7683         ENTRY;
7684
7685         if (o->od_mnt != NULL)
7686                 RETURN(0);
7687
7688         if (strlen(dev) >= sizeof(o->od_mntdev))
7689                 RETURN(-E2BIG);
7690         strcpy(o->od_mntdev, dev);
7691
7692         str = lustre_cfg_string(cfg, 2);
7693         s_flags = simple_strtoul(str, NULL, 0);
7694         str = strstr(str, ":");
7695         if (str)
7696                 lmd_flags = simple_strtoul(str + 1, NULL, 0);
7697         opts = lustre_cfg_string(cfg, 3);
7698 #ifdef __BIG_ENDIAN
7699         if (opts == NULL || strstr(opts, "bigendian_extents") == NULL) {
7700                 CERROR("%s: device %s extents feature is not guaranteed to "
7701                        "work on big-endian systems. Use \"bigendian_extents\" "
7702                        "mount option to override.\n", name, dev);
7703                 RETURN(-EINVAL);
7704         }
7705 #endif
7706 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
7707         if (opts != NULL && strstr(opts, "force_over_128tb") != NULL) {
7708                 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");
7709         }
7710 #endif
7711 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 1, 53, 0)
7712         if (opts != NULL && strstr(opts, "force_over_256tb") != NULL) {
7713                 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");
7714         }
7715 #endif
7716 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 53, 0)
7717         if (opts != NULL && strstr(opts, "force_over_512tb") != NULL) {
7718                 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");
7719         }
7720 #endif
7721
7722         if (opts != NULL && strstr(opts, "force_over_1024tb") != NULL)
7723                 force_over_1024tb = 1;
7724
7725         __page = alloc_page(GFP_KERNEL);
7726         if (__page == NULL)
7727                 GOTO(out, rc = -ENOMEM);
7728         page = (unsigned long)page_address(__page);
7729         options = (char *)page;
7730         *options = '\0';
7731         if (opts != NULL) {
7732                 /* strip out the options for back compatiblity */
7733                 static const char * const sout[] = {
7734                         "mballoc",
7735                         "iopen",
7736                         "noiopen",
7737                         "iopen_nopriv",
7738                         "extents",
7739                         "noextents",
7740                         /* strip out option we processed in osd */
7741                         "bigendian_extents",
7742                         "force_over_128tb",
7743                         "force_over_256tb",
7744                         "force_over_512tb",
7745                         "force_over_1024tb",
7746                         NULL
7747                 };
7748                 strncat(options, opts, PAGE_SIZE);
7749                 for (rc = 0, str = options; sout[rc]; ) {
7750                         char *op = strstr(str, sout[rc]);
7751
7752                         if (op == NULL) {
7753                                 rc++;
7754                                 str = options;
7755                                 continue;
7756                         }
7757                         if (op == options || *(op - 1) == ',') {
7758                                 str = op + strlen(sout[rc]);
7759                                 if (*str == ',' || *str == '\0') {
7760                                         *str == ',' ? str++ : str;
7761                                         memmove(op, str, strlen(str) + 1);
7762                                 }
7763                         }
7764                         for (str = op; *str != ',' && *str != '\0'; str++)
7765                                 ;
7766                 }
7767         } else {
7768                 strncat(options, "user_xattr,acl", PAGE_SIZE);
7769         }
7770
7771         /* Glom up mount options */
7772         if (*options != '\0')
7773                 strncat(options, ",", PAGE_SIZE);
7774         strncat(options, "no_mbcache,nodelalloc", PAGE_SIZE);
7775
7776         type = get_fs_type("ldiskfs");
7777         if (!type) {
7778                 CERROR("%s: cannot find ldiskfs module\n", name);
7779                 GOTO(out, rc = -ENODEV);
7780         }
7781
7782         o->od_mnt = vfs_kern_mount(type, s_flags, dev, options);
7783         module_put(type->owner);
7784
7785         if (IS_ERR(o->od_mnt)) {
7786                 rc = PTR_ERR(o->od_mnt);
7787                 o->od_mnt = NULL;
7788                 CERROR("%s: can't mount %s: %d\n", name, dev, rc);
7789                 GOTO(out, rc);
7790         }
7791
7792         if (ldiskfs_blocks_count(LDISKFS_SB(osd_sb(o))->s_es) <<
7793                                  osd_sb(o)->s_blocksize_bits > 1024ULL << 40 &&
7794                                  force_over_1024tb == 0) {
7795                 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",
7796                        name, dev);
7797                 GOTO(out_mnt, rc = -EINVAL);
7798         }
7799
7800         if (lmd_flags & LMD_FLG_DEV_RDONLY) {
7801                 LCONSOLE_WARN("%s: not support dev_rdonly on this device",
7802                               name);
7803
7804                 GOTO(out_mnt, rc = -EOPNOTSUPP);
7805         }
7806
7807         if (!ldiskfs_has_feature_journal(o->od_mnt->mnt_sb)) {
7808                 CERROR("%s: device %s is mounted w/o journal\n", name, dev);
7809                 GOTO(out_mnt, rc = -EINVAL);
7810         }
7811
7812 #ifdef LDISKFS_MOUNT_DIRDATA
7813         if (ldiskfs_has_feature_dirdata(o->od_mnt->mnt_sb))
7814                 LDISKFS_SB(osd_sb(o))->s_mount_opt |= LDISKFS_MOUNT_DIRDATA;
7815         else if (strstr(name, "MDT")) /* don't complain for MGT or OSTs */
7816                 CWARN("%s: device %s was upgraded from Lustre-1.x without "
7817                       "enabling the dirdata feature. If you do not want to "
7818                       "downgrade to Lustre-1.x again, you can enable it via "
7819                       "'tune2fs -O dirdata device'\n", name, dev);
7820 #endif
7821         inode = osd_sb(o)->s_root->d_inode;
7822         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
7823         rc = osd_ea_fid_set(info, inode, fid, LMAC_NOT_IN_OI, 0);
7824         if (rc != 0) {
7825                 CERROR("%s: failed to set lma on %s root inode\n", name, dev);
7826                 GOTO(out_mnt, rc);
7827         }
7828
7829         if (lmd_flags & LMD_FLG_NOSCRUB)
7830                 o->od_auto_scrub_interval = AS_NEVER;
7831
7832         if (blk_queue_nonrot(bdev_get_queue(osd_sb(o)->s_bdev))) {
7833                 /* do not use pagecache with flash-backed storage */
7834                 o->od_writethrough_cache = 0;
7835                 o->od_read_cache = 0;
7836         }
7837
7838         GOTO(out, rc = 0);
7839
7840 out_mnt:
7841         mntput(o->od_mnt);
7842         o->od_mnt = NULL;
7843
7844 out:
7845         if (__page)
7846                 __free_page(__page);
7847
7848         return rc;
7849 }
7850
7851 static struct lu_device *osd_device_fini(const struct lu_env *env,
7852                                          struct lu_device *d)
7853 {
7854         struct osd_device *o = osd_dev(d);
7855
7856         ENTRY;
7857
7858         osd_index_backup(env, o, false);
7859         osd_shutdown(env, o);
7860         osd_procfs_fini(o);
7861         if (o->od_oi_table != NULL)
7862                 osd_oi_fini(osd_oti_get(env), o);
7863         osd_obj_map_fini(o);
7864         osd_umount(env, o);
7865
7866         RETURN(NULL);
7867 }
7868
7869 static int osd_device_init0(const struct lu_env *env,
7870                             struct osd_device *o,
7871                             struct lustre_cfg *cfg)
7872 {
7873         struct lu_device *l = osd2lu_dev(o);
7874         struct osd_thread_info *info;
7875         int rc;
7876         int cplen = 0;
7877
7878         /* if the module was re-loaded, env can loose its keys */
7879         rc = lu_env_refill((struct lu_env *)env);
7880         if (rc)
7881                 GOTO(out, rc);
7882         info = osd_oti_get(env);
7883         LASSERT(info);
7884
7885         l->ld_ops = &osd_lu_ops;
7886         o->od_dt_dev.dd_ops = &osd_dt_ops;
7887
7888         spin_lock_init(&o->od_osfs_lock);
7889         mutex_init(&o->od_otable_mutex);
7890         INIT_LIST_HEAD(&o->od_orphan_list);
7891         INIT_LIST_HEAD(&o->od_index_backup_list);
7892         INIT_LIST_HEAD(&o->od_index_restore_list);
7893         spin_lock_init(&o->od_lock);
7894         o->od_index_backup_policy = LIBP_NONE;
7895         o->od_t10_type = 0;
7896         init_waitqueue_head(&o->od_commit_cb_done);
7897
7898         o->od_read_cache = 1;
7899         o->od_writethrough_cache = 1;
7900         o->od_readcache_max_filesize = OSD_MAX_CACHE_SIZE;
7901         o->od_readcache_max_iosize = OSD_READCACHE_MAX_IO_MB << 20;
7902         o->od_writethrough_max_iosize = OSD_WRITECACHE_MAX_IO_MB << 20;
7903         o->od_auto_scrub_interval = AS_DEFAULT;
7904
7905         cplen = strlcpy(o->od_svname, lustre_cfg_string(cfg, 4),
7906                         sizeof(o->od_svname));
7907         if (cplen >= sizeof(o->od_svname)) {
7908                 rc = -E2BIG;
7909                 GOTO(out, rc);
7910         }
7911
7912         o->od_index_backup_stop = 0;
7913         o->od_index = -1; /* -1 means index is invalid */
7914         rc = server_name2index(o->od_svname, &o->od_index, NULL);
7915         if (rc == LDD_F_SV_TYPE_OST)
7916                 o->od_is_ost = 1;
7917
7918         o->od_full_scrub_ratio = OFSR_DEFAULT;
7919         o->od_full_scrub_threshold_rate = FULL_SCRUB_THRESHOLD_RATE_DEFAULT;
7920         rc = osd_mount(env, o, cfg);
7921         if (rc != 0)
7922                 GOTO(out, rc);
7923
7924         /* Can only check block device after mount */
7925         o->od_nonrotational =
7926                 blk_queue_nonrot(bdev_get_queue(osd_sb(o)->s_bdev));
7927
7928         rc = osd_obj_map_init(env, o);
7929         if (rc != 0)
7930                 GOTO(out_mnt, rc);
7931
7932         rc = lu_site_init(&o->od_site, l);
7933         if (rc != 0)
7934                 GOTO(out_compat, rc);
7935         o->od_site.ls_bottom_dev = l;
7936
7937         rc = lu_site_init_finish(&o->od_site);
7938         if (rc != 0)
7939                 GOTO(out_site, rc);
7940
7941         INIT_LIST_HEAD(&o->od_ios_list);
7942         /* setup scrub, including OI files initialization */
7943         o->od_in_init = 1;
7944         rc = osd_scrub_setup(env, o);
7945         o->od_in_init = 0;
7946         if (rc < 0)
7947                 GOTO(out_site, rc);
7948
7949         rc = osd_procfs_init(o, o->od_svname);
7950         if (rc != 0) {
7951                 CERROR("%s: can't initialize procfs: rc = %d\n",
7952                        o->od_svname, rc);
7953                 GOTO(out_scrub, rc);
7954         }
7955
7956         LASSERT(l->ld_site->ls_linkage.next != NULL);
7957         LASSERT(l->ld_site->ls_linkage.prev != NULL);
7958
7959         /* initialize quota slave instance */
7960         /* currently it's no need to prepare qsd_instance_md for OST */
7961         if (!o->od_is_ost) {
7962                 o->od_quota_slave_md = qsd_init(env, o->od_svname,
7963                                                 &o->od_dt_dev,
7964                                                 o->od_proc_entry, true);
7965                 if (IS_ERR(o->od_quota_slave_md)) {
7966                         rc = PTR_ERR(o->od_quota_slave_md);
7967                         o->od_quota_slave_md = NULL;
7968                         GOTO(out_procfs, rc);
7969                 }
7970         }
7971
7972         o->od_quota_slave_dt = qsd_init(env, o->od_svname, &o->od_dt_dev,
7973                                         o->od_proc_entry, false);
7974
7975         if (IS_ERR(o->od_quota_slave_dt)) {
7976                 if (o->od_quota_slave_md != NULL) {
7977                         qsd_fini(env, o->od_quota_slave_md);
7978                         o->od_quota_slave_md = NULL;
7979                 }
7980
7981                 rc = PTR_ERR(o->od_quota_slave_dt);
7982                 o->od_quota_slave_dt = NULL;
7983                 GOTO(out_procfs, rc);
7984         }
7985
7986         RETURN(0);
7987
7988 out_procfs:
7989         osd_procfs_fini(o);
7990 out_scrub:
7991         osd_scrub_cleanup(env, o);
7992 out_site:
7993         lu_site_fini(&o->od_site);
7994 out_compat:
7995         osd_obj_map_fini(o);
7996 out_mnt:
7997         osd_umount(env, o);
7998 out:
7999         return rc;
8000 }
8001
8002 static struct lu_device *osd_device_alloc(const struct lu_env *env,
8003                                           struct lu_device_type *t,
8004                                           struct lustre_cfg *cfg)
8005 {
8006         struct osd_device *o;
8007         int rc;
8008
8009         OBD_ALLOC_PTR(o);
8010         if (o == NULL)
8011                 return ERR_PTR(-ENOMEM);
8012
8013         rc = dt_device_init(&o->od_dt_dev, t);
8014         if (rc == 0) {
8015                 /*
8016                  * Because the ctx might be revived in dt_device_init,
8017                  * refill the env here
8018                  */
8019                 lu_env_refill((struct lu_env *)env);
8020                 rc = osd_device_init0(env, o, cfg);
8021                 if (rc)
8022                         dt_device_fini(&o->od_dt_dev);
8023         }
8024
8025         if (unlikely(rc != 0))
8026                 OBD_FREE_PTR(o);
8027
8028         return rc == 0 ? osd2lu_dev(o) : ERR_PTR(rc);
8029 }
8030
8031 static struct lu_device *osd_device_free(const struct lu_env *env,
8032                                          struct lu_device *d)
8033 {
8034         struct osd_device *o = osd_dev(d);
8035
8036         ENTRY;
8037
8038         /* XXX: make osd top device in order to release reference */
8039         d->ld_site->ls_top_dev = d;
8040         lu_site_purge(env, d->ld_site, -1);
8041         lu_site_print(env, d->ld_site, &d->ld_site->ls_obj_hash.nelems,
8042                       D_ERROR, lu_cdebug_printer);
8043         lu_site_fini(&o->od_site);
8044         dt_device_fini(&o->od_dt_dev);
8045         OBD_FREE_PTR(o);
8046         RETURN(NULL);
8047 }
8048
8049 static int osd_process_config(const struct lu_env *env,
8050                               struct lu_device *d, struct lustre_cfg *cfg)
8051 {
8052         struct osd_device *o = osd_dev(d);
8053         ssize_t count;
8054         int rc;
8055
8056         ENTRY;
8057
8058         switch (cfg->lcfg_command) {
8059         case LCFG_SETUP:
8060                 rc = osd_mount(env, o, cfg);
8061                 break;
8062         case LCFG_CLEANUP:
8063                 /*
8064                  * For the case LCFG_PRE_CLEANUP is not called in advance,
8065                  * that may happend if hit failure during mount process.
8066                  */
8067                 osd_index_backup(env, o, false);
8068                 lu_dev_del_linkage(d->ld_site, d);
8069                 rc = osd_shutdown(env, o);
8070                 break;
8071         case LCFG_PARAM:
8072                 LASSERT(&o->od_dt_dev);
8073                 count  = class_modify_config(cfg, PARAM_OSD,
8074                                              &o->od_dt_dev.dd_kobj);
8075                 if (count < 0)
8076                         count = class_modify_config(cfg, PARAM_OST,
8077                                                     &o->od_dt_dev.dd_kobj);
8078                 rc = count > 0 ? 0 : count;
8079                 break;
8080         case LCFG_PRE_CLEANUP:
8081                 osd_scrub_stop(o);
8082                 osd_index_backup(env, o,
8083                                  o->od_index_backup_policy != LIBP_NONE);
8084                 rc = 0;
8085                 break;
8086         default:
8087                 rc = -ENOSYS;
8088         }
8089
8090         RETURN(rc);
8091 }
8092
8093 static int osd_recovery_complete(const struct lu_env *env,
8094                                  struct lu_device *d)
8095 {
8096         struct osd_device *osd = osd_dev(d);
8097         int rc = 0;
8098
8099         ENTRY;
8100
8101         if (osd->od_quota_slave_md == NULL && osd->od_quota_slave_dt == NULL)
8102                 RETURN(0);
8103
8104         /*
8105          * start qsd instance on recovery completion, this notifies the quota
8106          * slave code that we are about to process new requests now
8107          */
8108         rc = qsd_start(env, osd->od_quota_slave_dt);
8109         if (rc == 0 && osd->od_quota_slave_md != NULL)
8110                 rc = qsd_start(env, osd->od_quota_slave_md);
8111
8112         RETURN(rc);
8113 }
8114
8115 /*
8116  * we use exports to track all osd users
8117  */
8118 static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
8119                            struct obd_device *obd, struct obd_uuid *cluuid,
8120                            struct obd_connect_data *data, void *localdata)
8121 {
8122         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
8123         struct lustre_handle conn;
8124         int rc;
8125
8126         ENTRY;
8127
8128         CDEBUG(D_CONFIG, "connect #%d\n", osd->od_connects);
8129
8130         rc = class_connect(&conn, obd, cluuid);
8131         if (rc)
8132                 RETURN(rc);
8133
8134         *exp = class_conn2export(&conn);
8135
8136         spin_lock(&osd->od_osfs_lock);
8137         osd->od_connects++;
8138         spin_unlock(&osd->od_osfs_lock);
8139
8140         RETURN(0);
8141 }
8142
8143 /*
8144  * once last export (we don't count self-export) disappeared
8145  * osd can be released
8146  */
8147 static int osd_obd_disconnect(struct obd_export *exp)
8148 {
8149         struct obd_device *obd = exp->exp_obd;
8150         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
8151         int rc, release = 0;
8152
8153         ENTRY;
8154
8155         /* Only disconnect the underlying layers on the final disconnect. */
8156         spin_lock(&osd->od_osfs_lock);
8157         osd->od_connects--;
8158         if (osd->od_connects == 0)
8159                 release = 1;
8160         spin_unlock(&osd->od_osfs_lock);
8161
8162         rc = class_disconnect(exp); /* bz 9811 */
8163
8164         if (rc == 0 && release)
8165                 class_manual_cleanup(obd);
8166         RETURN(rc);
8167 }
8168
8169 static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
8170                        struct lu_device *dev)
8171 {
8172         struct osd_device *osd = osd_dev(dev);
8173         struct lr_server_data *lsd =
8174                         &osd->od_dt_dev.dd_lu_dev.ld_site->ls_tgt->lut_lsd;
8175         int result = 0;
8176
8177         ENTRY;
8178
8179         if (osd->od_quota_slave_md != NULL) {
8180                 /* set up quota slave objects for inode */
8181                 result = qsd_prepare(env, osd->od_quota_slave_md);
8182                 if (result != 0)
8183                         RETURN(result);
8184         }
8185
8186         if (osd->od_quota_slave_dt != NULL) {
8187                 /* set up quota slave objects for block */
8188                 result = qsd_prepare(env, osd->od_quota_slave_dt);
8189                 if (result != 0)
8190                         RETURN(result);
8191         }
8192
8193
8194         if (lsd->lsd_feature_incompat & OBD_COMPAT_OST) {
8195 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 52, 0)
8196                 if (lsd->lsd_feature_rocompat & OBD_ROCOMPAT_IDX_IN_IDIF) {
8197                         osd->od_index_in_idif = 1;
8198                 } else {
8199                         osd->od_index_in_idif = 0;
8200                         result = osd_register_proc_index_in_idif(osd);
8201                         if (result != 0)
8202                                 RETURN(result);
8203                 }
8204 #else
8205                 osd->od_index_in_idif = 1;
8206 #endif
8207         }
8208
8209         result = osd_fid_init(env, osd);
8210
8211         RETURN(result);
8212 }
8213
8214 /**
8215  * Implementation of lu_device_operations::ldo_fid_alloc() for OSD
8216  *
8217  * Allocate FID.
8218  *
8219  * see include/lu_object.h for the details.
8220  */
8221 static int osd_fid_alloc(const struct lu_env *env, struct lu_device *d,
8222                          struct lu_fid *fid, struct lu_object *parent,
8223                          const struct lu_name *name)
8224 {
8225         struct osd_device *osd = osd_dev(d);
8226
8227         return seq_client_alloc_fid(env, osd->od_cl_seq, fid);
8228 }
8229
8230 static const struct lu_object_operations osd_lu_obj_ops = {
8231         .loo_object_init      = osd_object_init,
8232         .loo_object_delete    = osd_object_delete,
8233         .loo_object_release   = osd_object_release,
8234         .loo_object_free      = osd_object_free,
8235         .loo_object_print     = osd_object_print,
8236         .loo_object_invariant = osd_object_invariant
8237 };
8238
8239 const struct lu_device_operations osd_lu_ops = {
8240         .ldo_object_alloc      = osd_object_alloc,
8241         .ldo_process_config    = osd_process_config,
8242         .ldo_recovery_complete = osd_recovery_complete,
8243         .ldo_prepare           = osd_prepare,
8244         .ldo_fid_alloc         = osd_fid_alloc,
8245 };
8246
8247 static const struct lu_device_type_operations osd_device_type_ops = {
8248         .ldto_init = osd_type_init,
8249         .ldto_fini = osd_type_fini,
8250
8251         .ldto_start = osd_type_start,
8252         .ldto_stop  = osd_type_stop,
8253
8254         .ldto_device_alloc = osd_device_alloc,
8255         .ldto_device_free  = osd_device_free,
8256
8257         .ldto_device_init = osd_device_init,
8258         .ldto_device_fini = osd_device_fini
8259 };
8260
8261 static struct lu_device_type osd_device_type = {
8262         .ldt_tags     = LU_DEVICE_DT,
8263         .ldt_name     = LUSTRE_OSD_LDISKFS_NAME,
8264         .ldt_ops      = &osd_device_type_ops,
8265         .ldt_ctx_tags = LCT_LOCAL,
8266 };
8267
8268 static int osd_health_check(const struct lu_env *env, struct obd_device *obd)
8269 {
8270         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
8271         struct super_block *sb = osd_sb(osd);
8272
8273         return (osd->od_mnt == NULL || sb->s_flags & SB_RDONLY);
8274 }
8275
8276 /*
8277  * lprocfs legacy support.
8278  */
8279 static const struct obd_ops osd_obd_device_ops = {
8280         .o_owner = THIS_MODULE,
8281         .o_connect      = osd_obd_connect,
8282         .o_disconnect   = osd_obd_disconnect,
8283         .o_health_check = osd_health_check,
8284 };
8285
8286 static ssize_t track_declares_assert_show(struct kobject *kobj,
8287                                    struct attribute *attr,
8288                                    char *buf)
8289 {
8290         return sprintf(buf, "%d\n", ldiskfs_track_declares_assert);
8291 }
8292
8293 static ssize_t track_declares_assert_store(struct kobject *kobj,
8294                                            struct attribute *attr,
8295                                            const char *buffer, size_t count)
8296 {
8297         bool track_declares_assert;
8298         int rc;
8299
8300         rc = kstrtobool(buffer, &track_declares_assert);
8301         if (rc)
8302                 return rc;
8303
8304         ldiskfs_track_declares_assert = track_declares_assert;
8305
8306         return count;
8307 }
8308 LUSTRE_RW_ATTR(track_declares_assert);
8309
8310 static int __init osd_init(void)
8311 {
8312         struct kobject *kobj;
8313         int rc;
8314
8315         BUILD_BUG_ON(BH_DXLock >=
8316                      sizeof(((struct buffer_head *)0)->b_state) * 8);
8317 #if !defined(CONFIG_DEBUG_MUTEXES) && !defined(CONFIG_DEBUG_SPINLOCK)
8318         /* please, try to keep osd_thread_info smaller than a page */
8319         BUILD_BUG_ON(sizeof(struct osd_thread_info) > PAGE_SIZE);
8320 #endif
8321
8322         osd_oi_mod_init();
8323
8324         rc = lu_kmem_init(ldiskfs_caches);
8325         if (rc)
8326                 return rc;
8327
8328 #ifdef CONFIG_KALLSYMS
8329         priv_security_file_alloc =
8330                 (void *)kallsyms_lookup_name("security_file_alloc");
8331 #endif
8332
8333         rc = class_register_type(&osd_obd_device_ops, NULL, true, NULL,
8334                                  LUSTRE_OSD_LDISKFS_NAME, &osd_device_type);
8335         if (rc) {
8336                 lu_kmem_fini(ldiskfs_caches);
8337                 return rc;
8338         }
8339
8340         kobj = kset_find_obj(lustre_kset, LUSTRE_OSD_LDISKFS_NAME);
8341         if (kobj) {
8342                 rc = sysfs_create_file(kobj,
8343                                        &lustre_attr_track_declares_assert.attr);
8344                 kobject_put(kobj);
8345                 if (rc) {
8346                         CWARN("osd-ldiskfs: track_declares_assert failed to register with sysfs\n");
8347                         rc = 0;
8348                 }
8349         }
8350         return rc;
8351 }
8352
8353 static void __exit osd_exit(void)
8354 {
8355         struct kobject *kobj;
8356
8357         kobj = kset_find_obj(lustre_kset, LUSTRE_OSD_LDISKFS_NAME);
8358         if (kobj) {
8359                 sysfs_remove_file(kobj,
8360                                   &lustre_attr_track_declares_assert.attr);
8361                 kobject_put(kobj);
8362         }
8363         class_unregister_type(LUSTRE_OSD_LDISKFS_NAME);
8364         lu_kmem_fini(ldiskfs_caches);
8365 }
8366
8367 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
8368 MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_LDISKFS_NAME")");
8369 MODULE_VERSION(LUSTRE_VERSION_STRING);
8370 MODULE_LICENSE("GPL");
8371
8372 module_init(osd_init);
8373 module_exit(osd_exit);