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[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_handler.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 only,
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License version 2 for more details (a copy is included
14  * in the LICENSE file that accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License
17  * version 2 along with this program; If not, see
18  * http://www.gnu.org/licenses/gpl-2.0.html
19  *
20  * GPL HEADER END
21  */
22 /*
23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Use is subject to license terms.
25  *
26  * Copyright (c) 2011, 2016, Intel Corporation.
27  */
28 /*
29  * This file is part of Lustre, http://www.lustre.org/
30  * Lustre is a trademark of Sun Microsystems, Inc.
31  *
32  * lustre/osd/osd_handler.c
33  *
34  * Top-level entry points into osd module
35  *
36  * Author: Nikita Danilov <nikita@clusterfs.com>
37  *         Pravin Shelar <pravin.shelar@sun.com> : Added fid in dirent
38  */
39
40 #define DEBUG_SUBSYSTEM S_OSD
41
42 #include <linux/module.h>
43 #include <linux/user_namespace.h>
44 #ifdef HAVE_UIDGID_HEADER
45 # include <linux/uidgid.h>
46 #endif
47
48 /* LUSTRE_VERSION_CODE */
49 #include <lustre_ver.h>
50 /* prerequisite for linux/xattr.h */
51 #include <linux/types.h>
52 /* prerequisite for linux/xattr.h */
53 #include <linux/fs.h>
54 /* XATTR_{REPLACE,CREATE} */
55 #include <linux/xattr.h>
56
57 #include <ldiskfs/ldiskfs.h>
58 #include <ldiskfs/xattr.h>
59 #include <ldiskfs/ldiskfs_extents.h>
60 #undef ENTRY
61 /*
62  * struct OBD_{ALLOC,FREE}*()
63  * OBD_FAIL_CHECK
64  */
65 #include <obd_support.h>
66 /* struct ptlrpc_thread */
67 #include <lustre_net.h>
68 #include <lustre_fid.h>
69 /* process_config */
70 #include <lustre_param.h>
71
72 #include "osd_internal.h"
73 #include "osd_dynlocks.h"
74
75 /* llo_* api support */
76 #include <md_object.h>
77 #include <lustre_quota.h>
78
79 #include <lustre_linkea.h>
80
81 #define PFID_STRIPE_IDX_BITS    16
82 #define PFID_STRIPE_COUNT_MASK  ((1 << PFID_STRIPE_IDX_BITS) - 1)
83
84 int ldiskfs_pdo = 1;
85 module_param(ldiskfs_pdo, int, 0644);
86 MODULE_PARM_DESC(ldiskfs_pdo, "ldiskfs with parallel directory operations");
87
88 int ldiskfs_track_declares_assert;
89 module_param(ldiskfs_track_declares_assert, int, 0644);
90 MODULE_PARM_DESC(ldiskfs_track_declares_assert, "LBUG during tracking of declares");
91
92 /* Slab to allocate dynlocks */
93 struct kmem_cache *dynlock_cachep;
94
95 /* Slab to allocate osd_it_ea */
96 struct kmem_cache *osd_itea_cachep;
97
98 static struct lu_kmem_descr ldiskfs_caches[] = {
99         {
100                 .ckd_cache = &dynlock_cachep,
101                 .ckd_name  = "dynlock_cache",
102                 .ckd_size  = sizeof(struct dynlock_handle)
103         },
104         {
105                 .ckd_cache = &osd_itea_cachep,
106                 .ckd_name  = "osd_itea_cache",
107                 .ckd_size  = sizeof(struct osd_it_ea)
108         },
109         {
110                 .ckd_cache = NULL
111         }
112 };
113
114 static const char dot[] = ".";
115 static const char dotdot[] = "..";
116 static const char remote_obj_dir[] = "REM_OBJ_DIR";
117
118 static const struct lu_object_operations      osd_lu_obj_ops;
119 static const struct dt_object_operations      osd_obj_ops;
120 static const struct dt_object_operations      osd_obj_ea_ops;
121 static const struct dt_object_operations      osd_obj_otable_it_ops;
122 static const struct dt_index_operations       osd_index_iam_ops;
123 static const struct dt_index_operations       osd_index_ea_ops;
124
125 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
126                           const struct lu_fid *fid);
127 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
128                                                 struct osd_device *osd);
129
130 int osd_trans_declare_op2rb[] = {
131         [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
132         [OSD_OT_PUNCH]          = OSD_OT_MAX,
133         [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
134         [OSD_OT_CREATE]         = OSD_OT_DESTROY,
135         [OSD_OT_DESTROY]        = OSD_OT_CREATE,
136         [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
137         [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
138         [OSD_OT_WRITE]          = OSD_OT_WRITE,
139         [OSD_OT_INSERT]         = OSD_OT_DELETE,
140         [OSD_OT_DELETE]         = OSD_OT_INSERT,
141         [OSD_OT_QUOTA]          = OSD_OT_MAX,
142 };
143
144 static int osd_has_index(const struct osd_object *obj)
145 {
146         return obj->oo_dt.do_index_ops != NULL;
147 }
148
149 static int osd_object_invariant(const struct lu_object *l)
150 {
151         return osd_invariant(osd_obj(l));
152 }
153
154 /*
155  * Concurrency: doesn't matter
156  */
157
158 /*
159  * Concurrency: doesn't matter
160  */
161 static int osd_write_locked(const struct lu_env *env, struct osd_object *o)
162 {
163         struct osd_thread_info *oti = osd_oti_get(env);
164         return oti->oti_w_locks > 0 && o->oo_owner == env;
165 }
166
167 /*
168  * Concurrency: doesn't access mutable data
169  */
170 static int osd_root_get(const struct lu_env *env,
171                         struct dt_device *dev, struct lu_fid *f)
172 {
173         lu_local_obj_fid(f, OSD_FS_ROOT_OID);
174         return 0;
175 }
176
177 /*
178  * the following set of functions are used to maintain per-thread
179  * cache of FID->ino mapping. this mechanism is needed to resolve
180  * FID to inode at dt_insert() which in turn stores ino in the
181  * directory entries to keep ldiskfs compatible with ext[34].
182  * due to locking-originated restrictions we can't lookup ino
183  * using LU cache (deadlock is possible). lookup using OI is quite
184  * expensive. so instead we maintain this cache and methods like
185  * dt_create() fill it. so in the majority of cases dt_insert() is
186  * able to find needed mapping in lockless manner.
187  */
188 static struct osd_idmap_cache *
189 osd_idc_find(const struct lu_env *env, struct osd_device *osd,
190              const struct lu_fid *fid)
191 {
192         struct osd_thread_info  *oti   = osd_oti_get(env);
193         struct osd_idmap_cache  *idc    = oti->oti_ins_cache;
194         int i;
195         for (i = 0; i < oti->oti_ins_cache_used; i++) {
196                 if (!lu_fid_eq(&idc[i].oic_fid, fid))
197                         continue;
198                 if (idc[i].oic_dev != osd)
199                         continue;
200
201                 return idc + i;
202         }
203
204         return NULL;
205 }
206
207 static struct osd_idmap_cache *
208 osd_idc_add(const struct lu_env *env, struct osd_device *osd,
209             const struct lu_fid *fid)
210 {
211         struct osd_thread_info  *oti   = osd_oti_get(env);
212         struct osd_idmap_cache  *idc;
213         int i;
214
215         if (unlikely(oti->oti_ins_cache_used >= oti->oti_ins_cache_size)) {
216                 i = oti->oti_ins_cache_size * 2;
217                 if (i == 0)
218                         i = OSD_INS_CACHE_SIZE;
219                 OBD_ALLOC(idc, sizeof(*idc) * i);
220                 if (idc == NULL)
221                         return ERR_PTR(-ENOMEM);
222                 if (oti->oti_ins_cache != NULL) {
223                         memcpy(idc, oti->oti_ins_cache,
224                                oti->oti_ins_cache_used * sizeof(*idc));
225                         OBD_FREE(oti->oti_ins_cache,
226                                  oti->oti_ins_cache_used * sizeof(*idc));
227                 }
228                 oti->oti_ins_cache = idc;
229                 oti->oti_ins_cache_size = i;
230         }
231
232         idc = oti->oti_ins_cache + oti->oti_ins_cache_used++;
233         idc->oic_fid = *fid;
234         idc->oic_dev = osd;
235         idc->oic_lid.oii_ino = 0;
236         idc->oic_lid.oii_gen = 0;
237         idc->oic_remote = 0;
238
239         return idc;
240 }
241
242 /*
243  * lookup mapping for the given fid in the cache, initialize a
244  * new one if not found. the initialization checks whether the
245  * object is local or remote. for local objects, OI is used to
246  * learn ino/generation. the function is used when the caller
247  * has no information about the object, e.g. at dt_insert().
248  */
249 static struct osd_idmap_cache *
250 osd_idc_find_or_init(const struct lu_env *env, struct osd_device *osd,
251                      const struct lu_fid *fid)
252 {
253         struct osd_idmap_cache *idc;
254         int rc;
255
256         idc = osd_idc_find(env, osd, fid);
257         LASSERT(!IS_ERR(idc));
258         if (idc != NULL)
259                 return idc;
260
261         /* new mapping is needed */
262         idc = osd_idc_add(env, osd, fid);
263         if (IS_ERR(idc))
264                 return idc;
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 /*
289  * lookup mapping for given FID and fill it from the given object.
290  * the object is lolcal by definition.
291  */
292 static int osd_idc_find_and_init(const struct lu_env *env,
293                                  struct osd_device *osd,
294                                  struct osd_object *obj)
295 {
296         const struct lu_fid     *fid = lu_object_fid(&obj->oo_dt.do_lu);
297         struct osd_idmap_cache  *idc;
298
299         idc = osd_idc_find(env, osd, fid);
300         LASSERT(!IS_ERR(idc));
301         if (idc != NULL) {
302                 if (obj->oo_inode == NULL)
303                         return 0;
304                 if (idc->oic_lid.oii_ino != obj->oo_inode->i_ino) {
305                         LASSERT(idc->oic_lid.oii_ino == 0);
306                         idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
307                         idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
308                 }
309                 return 0;
310         }
311
312         /* new mapping is needed */
313         idc = osd_idc_add(env, osd, fid);
314         if (IS_ERR(idc))
315                 return PTR_ERR(idc);
316
317         if (obj->oo_inode != NULL) {
318                 idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
319                 idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
320         }
321         return 0;
322 }
323
324 /*
325  * OSD object methods.
326  */
327
328 /*
329  * Concurrency: no concurrent access is possible that early in object
330  * life-cycle.
331  */
332 static struct lu_object *osd_object_alloc(const struct lu_env *env,
333                                           const struct lu_object_header *hdr,
334                                           struct lu_device *d)
335 {
336         struct osd_object *mo;
337
338         OBD_ALLOC_PTR(mo);
339         if (mo != NULL) {
340                 struct lu_object *l;
341
342                 l = &mo->oo_dt.do_lu;
343                 dt_object_init(&mo->oo_dt, NULL, d);
344                 mo->oo_dt.do_ops = &osd_obj_ea_ops;
345                 l->lo_ops = &osd_lu_obj_ops;
346                 init_rwsem(&mo->oo_sem);
347                 init_rwsem(&mo->oo_ext_idx_sem);
348                 spin_lock_init(&mo->oo_guard);
349                 INIT_LIST_HEAD(&mo->oo_xattr_list);
350                 return l;
351         } else {
352                 return NULL;
353         }
354 }
355
356 int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
357                 struct dentry *dentry, struct lustre_ost_attrs *loa)
358 {
359         int rc;
360
361         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
362                              (void *)loa, sizeof(*loa));
363         if (rc > 0) {
364                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
365
366                 if (rc < sizeof(*lma))
367                         return -EINVAL;
368
369                 rc = 0;
370                 lustre_loa_swab(loa, true);
371                 /* Check LMA compatibility */
372                 if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
373                         CWARN("%.16s: unsupported incompat LMA feature(s) %#x "
374                               "for fid = "DFID", ino = %lu\n",
375                               LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
376                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
377                               PFID(&lma->lma_self_fid), inode->i_ino);
378                         rc = -EOPNOTSUPP;
379                 }
380         } else if (rc == 0) {
381                 rc = -ENODATA;
382         }
383
384         return rc;
385 }
386
387 /*
388  * retrieve object from backend ext fs.
389  **/
390 struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
391                        struct osd_inode_id *id)
392 {
393         int rc;
394         struct inode *inode = NULL;
395
396         /* if we look for an inode withing a running
397          * transaction, then we risk to deadlock */
398         /* osd_dirent_check_repair() breaks this */
399         /*LASSERT(current->journal_info == NULL);*/
400
401         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
402         if (IS_ERR(inode)) {
403                 CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
404                        id->oii_ino, PTR_ERR(inode));
405         } else if (id->oii_gen != OSD_OII_NOGEN &&
406                    inode->i_generation != id->oii_gen) {
407                 CDEBUG(D_INODE, "unmatched inode: ino = %u, oii_gen = %u, "
408                        "i_generation = %u\n",
409                        id->oii_ino, id->oii_gen, inode->i_generation);
410                 iput(inode);
411                 inode = ERR_PTR(-ESTALE);
412         } else if (inode->i_nlink == 0) {
413                 /* due to parallel readdir and unlink,
414                 * we can have dead inode here. */
415                 CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
416                 iput(inode);
417                 inode = ERR_PTR(-ESTALE);
418         } else if (is_bad_inode(inode)) {
419                 CWARN("%.16s: bad inode: ino = %u\n",
420                 LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name, id->oii_ino);
421                 iput(inode);
422                 inode = ERR_PTR(-ENOENT);
423         } else if ((rc = osd_attach_jinode(inode))) {
424                 iput(inode);
425                 inode = ERR_PTR(rc);
426         } else {
427                 ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
428                 if (id->oii_gen == OSD_OII_NOGEN)
429                         osd_id_gen(id, inode->i_ino, inode->i_generation);
430
431                 /* Do not update file c/mtime in ldiskfs.
432                  * NB: we don't have any lock to protect this because we don't
433                  * have reference on osd_object now, but contention with
434                  * another lookup + attr_set can't happen in the tiny window
435                  * between if (...) and set S_NOCMTIME. */
436                 if (!(inode->i_flags & S_NOCMTIME))
437                         inode->i_flags |= S_NOCMTIME;
438         }
439         return inode;
440 }
441
442 int osd_ldiskfs_add_entry(struct osd_thread_info *info, struct osd_device *osd,
443                           handle_t *handle, struct dentry *child,
444                           struct inode *inode, struct htree_lock *hlock)
445 {
446         int rc, rc2;
447
448         rc = __ldiskfs_add_entry(handle, child, inode, hlock);
449         if (rc == -ENOBUFS || rc == -ENOSPC) {
450                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
451                 struct inode *parent = child->d_parent->d_inode;
452                 struct lu_fid *fid = NULL;
453
454                 rc2 = osd_get_lma(info, parent, child->d_parent, loa);
455                 if (!rc2) {
456                         fid = &loa->loa_lma.lma_self_fid;
457                 } else if (rc2 == -ENODATA) {
458                         if (unlikely(parent == inode->i_sb->s_root->d_inode)) {
459                                 fid = &info->oti_fid3;
460                                 lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
461                         } else if (!osd->od_is_ost && osd->od_index == 0) {
462                                 fid = &info->oti_fid3;
463                                 lu_igif_build(fid, parent->i_ino,
464                                               parent->i_generation);
465                         }
466                 }
467
468                 if (fid != NULL)
469                         CWARN("%s: directory (inode: %lu, FID: "DFID") %s "
470                               "maximum entry limit\n",
471                               osd_name(osd), parent->i_ino, PFID(fid),
472                               rc == -ENOSPC ? "has reached" : "is approaching");
473                 else
474                         CWARN("%s: directory (inode: %lu, FID: unknown) %s "
475                               "maximum entry limit\n",
476                               osd_name(osd), parent->i_ino,
477                               rc == -ENOSPC ? "has reached" : "is approaching");
478
479                 /* ignore such error now */
480                 if (rc == -ENOBUFS)
481                         rc = 0;
482         }
483
484         return rc;
485 }
486
487
488 static struct inode *
489 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
490              struct osd_inode_id *id, struct lu_fid *fid)
491 {
492         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
493         struct inode *inode;
494         int rc;
495
496         inode = osd_iget(info, dev, id);
497         if (IS_ERR(inode))
498                 return inode;
499
500         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
501         if (!rc) {
502                 *fid = loa->loa_lma.lma_self_fid;
503         } else if (rc == -ENODATA) {
504                 if (unlikely(inode == osd_sb(dev)->s_root->d_inode))
505                         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
506                 else
507                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
508         } else {
509                 iput(inode);
510                 inode = ERR_PTR(rc);
511         }
512         return inode;
513 }
514
515 static struct inode *osd_iget_check(struct osd_thread_info *info,
516                                     struct osd_device *dev,
517                                     const struct lu_fid *fid,
518                                     struct osd_inode_id *id,
519                                     bool trusted)
520 {
521         struct inode *inode;
522         int rc = 0;
523         ENTRY;
524
525         /* The cached OI mapping is trustable. If we cannot locate the inode
526          * via the cached OI mapping, then return the failure to the caller
527          * directly without further OI checking. */
528
529 again:
530         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
531         if (IS_ERR(inode)) {
532                 rc = PTR_ERR(inode);
533                 if (!trusted && (rc == -ENOENT || rc == -ESTALE))
534                         goto check_oi;
535
536                 CDEBUG(D_INODE, "no inode for FID: "DFID", ino = %u, rc = %d\n",
537                        PFID(fid), id->oii_ino, rc);
538                 GOTO(put, rc);
539         }
540
541         if (is_bad_inode(inode)) {
542                 rc = -ENOENT;
543                 if (!trusted)
544                         goto check_oi;
545
546                 CDEBUG(D_INODE, "bad inode for FID: "DFID", ino = %u\n",
547                        PFID(fid), id->oii_ino);
548                 GOTO(put, rc);
549         }
550
551         if (id->oii_gen != OSD_OII_NOGEN &&
552             inode->i_generation != id->oii_gen) {
553                 rc = -ESTALE;
554                 if (!trusted)
555                         goto check_oi;
556
557                 CDEBUG(D_INODE, "unmatched inode for FID: "DFID", ino = %u, "
558                        "oii_gen = %u, i_generation = %u\n", PFID(fid),
559                        id->oii_ino, id->oii_gen, inode->i_generation);
560                 GOTO(put, rc);
561         }
562
563         if (inode->i_nlink == 0) {
564                 rc = -ENOENT;
565                 if (!trusted)
566                         goto check_oi;
567
568                 CDEBUG(D_INODE, "stale inode for FID: "DFID", ino = %u\n",
569                        PFID(fid), id->oii_ino);
570                 GOTO(put, rc);
571         }
572
573         ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
574
575 check_oi:
576         if (rc != 0) {
577                 __u32 saved_ino = id->oii_ino;
578                 __u32 saved_gen = id->oii_gen;
579
580                 LASSERT(!trusted);
581                 LASSERTF(rc == -ESTALE || rc == -ENOENT, "rc = %d\n", rc);
582
583                 rc = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
584                 /* XXX: There are four possible cases:
585                  *      1. rc = 0.
586                  *         Backup/restore caused the OI invalid.
587                  *      2. rc = 0.
588                  *         Someone unlinked the object but NOT removed
589                  *         the OI mapping, such as mount target device
590                  *         as ldiskfs, and modify something directly.
591                  *      3. rc = -ENOENT.
592                  *         Someone just removed the object between the
593                  *         former oi_lookup and the iget. It is normal.
594                  *      4. Other failure cases.
595                  *
596                  *      Generally, when the device is mounted, it will
597                  *      auto check whether the system is restored from
598                  *      file-level backup or not. We trust such detect
599                  *      to distinguish the 1st case from the 2nd case:
600                  *      if the OI files are consistent but may contain
601                  *      stale OI mappings because of case 2, if iget()
602                  *      returns -ENOENT or -ESTALE, then it should be
603                  *      the case 2. */
604                 if (rc != 0)
605                         /* If the OI mapping was in OI file before the
606                          * osd_iget_check(), but now, it is disappear,
607                          * then it must be removed by race. That is a
608                          * normal race case. */
609                         GOTO(put, rc);
610
611                 /* It is the OI scrub updated the OI mapping by race.
612                  * The new OI mapping must be valid. */
613                 if (saved_ino != id->oii_ino || saved_gen != id->oii_gen) {
614                         trusted = true;
615                         goto again;
616                 }
617
618                 if (IS_ERR(inode)) {
619                         if (dev->od_scrub.os_file.sf_flags & SF_INCONSISTENT)
620                                 /* It still can be the case 2, but we cannot
621                                  * distinguish it from the case 1. So return
622                                  * -EREMCHG to block current operation until
623                                  *  OI scrub rebuilt the OI mappings. */
624                                 rc = -EREMCHG;
625                         else
626                                 rc = -ENOENT;
627
628                         GOTO(put, rc);
629                 }
630
631                 if (inode->i_generation == id->oii_gen)
632                         rc = -ENOENT;
633                 else
634                         rc = -EREMCHG;
635         } else {
636                 if (id->oii_gen == OSD_OII_NOGEN)
637                         osd_id_gen(id, inode->i_ino, inode->i_generation);
638
639                 /* Do not update file c/mtime in ldiskfs.
640                  * NB: we don't have any lock to protect this because we don't
641                  * have reference on osd_object now, but contention with
642                  * another lookup + attr_set can't happen in the tiny window
643                  * between if (...) and set S_NOCMTIME. */
644                 if (!(inode->i_flags & S_NOCMTIME))
645                         inode->i_flags |= S_NOCMTIME;
646         }
647
648         GOTO(put, rc);
649
650 put:
651         if (rc != 0) {
652                 if (!IS_ERR(inode))
653                         iput(inode);
654
655                 inode = ERR_PTR(rc);
656         }
657
658         return inode;
659 }
660
661 /**
662  * \retval +v: new filter_fid, does not contain self-fid
663  * \retval 0:  filter_fid_old, contains self-fid
664  * \retval -v: other failure cases
665  */
666 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
667                  struct dentry *dentry, struct lu_fid *fid)
668 {
669         struct filter_fid_old   *ff     = &info->oti_ff;
670         struct ost_id           *ostid  = &info->oti_ostid;
671         int                      rc;
672
673         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
674         if (rc == sizeof(*ff)) {
675                 rc = 0;
676                 ostid_set_seq(ostid, le64_to_cpu(ff->ff_seq));
677                 rc = ostid_set_id(ostid, le64_to_cpu(ff->ff_objid));
678                 /*
679                  * XXX: use 0 as the index for compatibility, the caller will
680                  *      handle index related issues when necessary.
681                  */
682                 if (!rc)
683                         ostid_to_fid(fid, ostid, 0);
684         } else if (rc == sizeof(struct filter_fid)) {
685                 rc = 1;
686         } else if (rc >= 0) {
687                 rc = -EINVAL;
688         }
689
690         return rc;
691 }
692
693 static int osd_lma_self_repair(struct osd_thread_info *info,
694                                struct osd_device *osd, struct inode *inode,
695                                const struct lu_fid *fid, __u32 compat)
696 {
697         handle_t *jh;
698         int       rc;
699
700         LASSERT(current->journal_info == NULL);
701
702         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
703                                   osd_dto_credits_noquota[DTO_XATTR_SET]);
704         if (IS_ERR(jh)) {
705                 rc = PTR_ERR(jh);
706                 CWARN("%s: cannot start journal for lma_self_repair: rc = %d\n",
707                       osd_name(osd), rc);
708                 return rc;
709         }
710
711         rc = osd_ea_fid_set(info, inode, fid, compat, 0);
712         if (rc != 0)
713                 CWARN("%s: cannot self repair the LMA: rc = %d\n",
714                       osd_name(osd), rc);
715         ldiskfs_journal_stop(jh);
716         return rc;
717 }
718
719 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
720 {
721         struct osd_thread_info  *info   = osd_oti_get(env);
722         struct osd_device       *osd    = osd_obj2dev(obj);
723         struct lustre_ost_attrs *loa    = &info->oti_ost_attrs;
724         struct lustre_mdt_attrs *lma    = &loa->loa_lma;
725         struct inode            *inode  = obj->oo_inode;
726         struct dentry           *dentry = &info->oti_obj_dentry;
727         struct lu_fid           *fid    = NULL;
728         const struct lu_fid     *rfid   = lu_object_fid(&obj->oo_dt.do_lu);
729         int                      rc;
730         ENTRY;
731
732         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
733                              (void *)loa, sizeof(*loa));
734         if (rc == -ENODATA && !fid_is_igif(rfid) && osd->od_check_ff) {
735                 fid = &lma->lma_self_fid;
736                 rc = osd_get_idif(info, inode, dentry, fid);
737                 if ((rc > 0) || (rc == -ENODATA && osd->od_index_in_idif)) {
738                         /* For the given OST-object, if it has neither LMA nor
739                          * FID in XATTR_NAME_FID, then the given FID (which is
740                          * contained in the @obj, from client RPC for locating
741                          * the OST-object) is trusted. We use it to generate
742                          * the LMA. */
743                         osd_lma_self_repair(info, osd, inode, rfid,
744                                             LMAC_FID_ON_OST);
745                         RETURN(0);
746                 }
747         }
748
749         if (rc < 0)
750                 RETURN(rc);
751
752         if (rc > 0) {
753                 rc = 0;
754                 lustre_lma_swab(lma);
755                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
756                              (CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT) &&
757                               S_ISREG(inode->i_mode)))) {
758                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
759                               "fid = "DFID", ino = %lu\n", osd_name(osd),
760                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
761                               PFID(rfid), inode->i_ino);
762                         rc = -EOPNOTSUPP;
763                 } else {
764                         fid = &lma->lma_self_fid;
765                 }
766         }
767
768         if (fid != NULL && unlikely(!lu_fid_eq(rfid, fid))) {
769                 if (fid_is_idif(rfid) && fid_is_idif(fid)) {
770                         struct ost_id   *oi   = &info->oti_ostid;
771                         struct lu_fid   *fid1 = &info->oti_fid3;
772                         __u32            idx  = fid_idif_ost_idx(rfid);
773
774                         /* For old IDIF, the OST index is not part of the IDIF,
775                          * Means that different OSTs may have the same IDIFs.
776                          * Under such case, we need to make some compatible
777                          * check to make sure to trigger OI scrub properly. */
778                         if (idx != 0 && fid_idif_ost_idx(fid) == 0) {
779                                 /* Given @rfid is new, LMA is old. */
780                                 fid_to_ostid(fid, oi);
781                                 ostid_to_fid(fid1, oi, idx);
782                                 if (lu_fid_eq(fid1, rfid)) {
783                                         if (osd->od_index_in_idif)
784                                                 osd_lma_self_repair(info, osd,
785                                                         inode, rfid,
786                                                         LMAC_FID_ON_OST);
787                                         RETURN(0);
788                                 }
789                         }
790                 }
791
792                 rc = -EREMCHG;
793         }
794
795         RETURN(rc);
796 }
797
798 struct osd_check_lmv_buf {
799 #ifdef HAVE_DIR_CONTEXT
800         /* please keep it as first member */
801         struct dir_context       ctx;
802 #endif
803         struct osd_thread_info  *oclb_info;
804         struct osd_device       *oclb_dev;
805         struct osd_idmap_cache  *oclb_oic;
806 };
807
808 /**
809  * It is called internally by ->readdir() to filter out the
810  * local slave object's FID of the striped directory.
811  *
812  * \retval      1 found the local slave's FID
813  * \retval      0 continue to check next item
814  * \retval      -ve for failure
815  */
816 #ifdef HAVE_FILLDIR_USE_CTX
817 static int osd_stripe_dir_filldir(struct dir_context *buf,
818 #else
819 static int osd_stripe_dir_filldir(void *buf,
820 #endif
821                                   const char *name, int namelen,
822                                   loff_t offset, __u64 ino, unsigned d_type)
823 {
824         struct osd_check_lmv_buf *oclb = (struct osd_check_lmv_buf *)buf;
825         struct osd_thread_info *oti = oclb->oclb_info;
826         struct lu_fid *fid = &oti->oti_fid3;
827         struct osd_inode_id *id = &oti->oti_id3;
828         struct osd_device *dev = oclb->oclb_dev;
829         struct osd_idmap_cache *oic = oclb->oclb_oic;
830         struct inode *inode;
831         int rc;
832
833         if (name[0] == '.')
834                 return 0;
835
836         fid_zero(fid);
837         sscanf(name + 1, SFID, RFID(fid));
838         if (!fid_is_sane(fid))
839                 return 0;
840
841         if (osd_remote_fid(oti->oti_env, dev, fid))
842                 return 0;
843
844         osd_id_gen(id, ino, OSD_OII_NOGEN);
845         inode = osd_iget(oti, dev, id);
846         if (IS_ERR(inode))
847                 return PTR_ERR(inode);
848
849         iput(inode);
850         osd_add_oi_cache(oti, dev, id, fid);
851         oic->oic_fid = *fid;
852         oic->oic_lid = *id;
853         oic->oic_dev = dev;
854         rc = osd_oii_insert(dev, oic, true);
855
856         return rc == 0 ? 1 : rc;
857 }
858
859 /* When lookup item under striped directory, we need to locate the master
860  * MDT-object of the striped directory firstly, then the client will send
861  * lookup (getattr_by_name) RPC to the MDT with some slave MDT-object's FID
862  * and the item's name. If the system is restored from MDT file level backup,
863  * then before the OI scrub completely built the OI files, the OI mappings of
864  * the master MDT-object and slave MDT-object may be invalid. Usually, it is
865  * not a problem for the master MDT-object. Because when locate the master
866  * MDT-object, we will do name based lookup (for the striped directory itself)
867  * firstly, during such process we can setup the correct OI mapping for the
868  * master MDT-object. But it will be trouble for the slave MDT-object. Because
869  * the client will not trigger name based lookup on the MDT to locate the slave
870  * MDT-object before locating item under the striped directory, then when
871  * osd_fid_lookup(), it will find that the OI mapping for the slave MDT-object
872  * is invalid and does not know what the right OI mapping is, then the MDT has
873  * to return -EINPROGRESS to the client to notify that the OI scrub is rebuiding
874  * the OI file, related OI mapping is unknown yet, please try again later. And
875  * then client will re-try the RPC again and again until related OI mapping has
876  * been updated. That is quite inefficient.
877  *
878  * To resolve above trouble, we will handle it as the following two cases:
879  *
880  * 1) The slave MDT-object and the master MDT-object are on different MDTs.
881  *    It is relative easy. Be as one of remote MDT-objects, the slave MDT-object
882  *    is linked under /REMOTE_PARENT_DIR with the name of its FID string.
883  *    We can locate the slave MDT-object via lookup the /REMOTE_PARENT_DIR
884  *    directly. Please check osd_fid_lookup().
885  *
886  * 2) The slave MDT-object and the master MDT-object reside on the same MDT.
887  *    Under such case, during lookup the master MDT-object, we will lookup the
888  *    slave MDT-object via readdir against the master MDT-object, because the
889  *    slave MDT-objects information are stored as sub-directories with the name
890  *    "${FID}:${index}". Then when find the local slave MDT-object, its OI
891  *    mapping will be recorded. Then subsequent osd_fid_lookup() will know
892  *    the correct OI mapping for the slave MDT-object. */
893 static int osd_check_lmv(struct osd_thread_info *oti, struct osd_device *dev,
894                          struct inode *inode, struct osd_idmap_cache *oic)
895 {
896         struct lu_buf *buf = &oti->oti_big_buf;
897         struct dentry *dentry = &oti->oti_obj_dentry;
898         struct file *filp = &oti->oti_file;
899         const struct file_operations *fops;
900         struct lmv_mds_md_v1 *lmv1;
901         struct osd_check_lmv_buf oclb = {
902 #ifdef HAVE_DIR_CONTEXT
903                 .ctx.actor = osd_stripe_dir_filldir,
904 #endif
905                 .oclb_info = oti,
906                 .oclb_dev = dev,
907                 .oclb_oic = oic
908         };
909         int rc = 0;
910         ENTRY;
911
912 again:
913         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMV, buf->lb_buf,
914                              buf->lb_len);
915         if (rc == -ERANGE) {
916                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMV, NULL, 0);
917                 if (rc > 0) {
918                         lu_buf_realloc(buf, rc);
919                         if (buf->lb_buf == NULL)
920                                 GOTO(out, rc = -ENOMEM);
921
922                         goto again;
923                 }
924         }
925
926         if (unlikely(rc == 0 || rc == -ENODATA))
927                 GOTO(out, rc = 0);
928
929         if (rc < 0)
930                 GOTO(out, rc);
931
932         if (unlikely(buf->lb_buf == NULL)) {
933                 lu_buf_realloc(buf, rc);
934                 if (buf->lb_buf == NULL)
935                         GOTO(out, rc = -ENOMEM);
936
937                 goto again;
938         }
939
940         lmv1 = buf->lb_buf;
941         if (le32_to_cpu(lmv1->lmv_magic) != LMV_MAGIC_V1)
942                 GOTO(out, rc = 0);
943
944         fops = inode->i_fop;
945         dentry->d_inode = inode;
946         dentry->d_sb = inode->i_sb;
947         filp->f_pos = 0;
948         filp->f_path.dentry = dentry;
949         filp->f_mode = FMODE_64BITHASH;
950         filp->f_mapping = inode->i_mapping;
951         filp->f_op = fops;
952         filp->private_data = NULL;
953         set_file_inode(filp, inode);
954
955 #ifdef HAVE_DIR_CONTEXT
956         oclb.ctx.pos = filp->f_pos;
957         rc = fops->iterate(filp, &oclb.ctx);
958         filp->f_pos = oclb.ctx.pos;
959 #else
960         rc = fops->readdir(filp, &oclb, osd_stripe_dir_filldir);
961 #endif
962         fops->release(inode, filp);
963
964 out:
965         if (rc < 0)
966                 CDEBUG(D_LFSCK, "%.16s: fail to check LMV EA, inode = %lu/%u,"
967                        DFID": rc = %d\n",
968                        LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
969                        inode->i_ino, inode->i_generation,
970                        PFID(&oic->oic_fid), rc);
971         else
972                 rc = 0;
973
974         RETURN(rc);
975 }
976
977 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
978                           const struct lu_fid *fid,
979                           const struct lu_object_conf *conf)
980 {
981         struct osd_thread_info *info;
982         struct lu_device *ldev = obj->oo_dt.do_lu.lo_dev;
983         struct osd_device *dev;
984         struct osd_idmap_cache *oic;
985         struct osd_inode_id *id;
986         struct inode *inode = NULL;
987         struct osd_scrub *scrub;
988         struct scrub_file *sf;
989         __u32 flags = SS_CLEAR_DRYRUN | SS_CLEAR_FAILOUT | SS_AUTO_FULL;
990         __u32 saved_ino;
991         __u32 saved_gen;
992         int result = 0;
993         int rc1 = 0;
994         bool remote = false;
995         bool trusted = true;
996         bool updated = false;
997         ENTRY;
998
999         LINVRNT(osd_invariant(obj));
1000         LASSERT(obj->oo_inode == NULL);
1001         LASSERTF(fid_is_sane(fid) || fid_is_idif(fid), DFID"\n", PFID(fid));
1002
1003         dev = osd_dev(ldev);
1004         scrub = &dev->od_scrub;
1005         sf = &scrub->os_file;
1006         info = osd_oti_get(env);
1007         LASSERT(info);
1008         oic = &info->oti_cache;
1009
1010         if (OBD_FAIL_CHECK(OBD_FAIL_SRV_ENOENT))
1011                 RETURN(-ENOENT);
1012
1013         /* For the object is created as locking anchor, or for the object to
1014          * be created on disk. No need to osd_oi_lookup() at here because FID
1015          * shouldn't never be re-used, if it's really a duplicate FID from
1016          * unexpected reason, we should be able to detect it later by calling
1017          * do_create->osd_oi_insert(). */
1018         if (conf != NULL && conf->loc_flags & LOC_F_NEW)
1019                 GOTO(out, result = 0);
1020
1021         /* Search order: 1. per-thread cache. */
1022         if (lu_fid_eq(fid, &oic->oic_fid) &&
1023             likely(oic->oic_dev == dev)) {
1024                 id = &oic->oic_lid;
1025                 goto iget;
1026         }
1027
1028         id = &info->oti_id;
1029         if (!list_empty(&scrub->os_inconsistent_items)) {
1030                 /* Search order: 2. OI scrub pending list. */
1031                 result = osd_oii_lookup(dev, fid, id);
1032                 if (result == 0)
1033                         goto iget;
1034         }
1035
1036         /* The OI mapping in the OI file can be updated by the OI scrub
1037          * when we locate the inode via FID. So it may be not trustable. */
1038         trusted = false;
1039
1040         /* Search order: 3. OI files. */
1041         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1042         if (result == -ENOENT) {
1043                 if (!(fid_is_norm(fid) || fid_is_igif(fid)) ||
1044                     fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
1045                     !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
1046                                       sf->sf_oi_bitmap))
1047                         GOTO(out, result = 0);
1048
1049                 goto trigger;
1050         }
1051
1052         if (result != 0)
1053                 GOTO(out, result);
1054
1055 iget:
1056         inode = osd_iget_check(info, dev, fid, id, trusted);
1057         if (IS_ERR(inode)) {
1058                 result = PTR_ERR(inode);
1059                 if (result == -ENOENT || result == -ESTALE)
1060                         GOTO(out, result = 0);
1061
1062                 if (result == -EREMCHG) {
1063
1064 trigger:
1065                         /* We still have chance to get the valid inode: for the
1066                          * object which is referenced by remote name entry, the
1067                          * object on the local MDT will be linked under the dir
1068                          * of "/REMOTE_PARENT_DIR" with its FID string as name.
1069                          *
1070                          * We do not know whether the object for the given FID
1071                          * is referenced by some remote name entry or not, and
1072                          * especially for DNE II, a multiple-linked object may
1073                          * have many name entries reside on many MDTs.
1074                          *
1075                          * To simplify the operation, OSD will not distinguish
1076                          * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
1077                          * only happened for the RPC from other MDT during the
1078                          * OI scrub, or for the client side RPC with FID only,
1079                          * such as FID to path, or from old connected client. */
1080                         if (!remote &&
1081                             !fid_is_on_ost(info, dev, fid, OI_CHECK_FLD)) {
1082                                 rc1 = osd_lookup_in_remote_parent(info, dev,
1083                                                                   fid, id);
1084                                 if (rc1 == 0) {
1085                                         remote = true;
1086                                         trusted = true;
1087                                         flags |= SS_AUTO_PARTIAL;
1088                                         flags &= ~SS_AUTO_FULL;
1089                                         goto iget;
1090                                 }
1091                         }
1092
1093                         if (thread_is_running(&scrub->os_thread)) {
1094                                 if (scrub->os_partial_scan &&
1095                                     !scrub->os_in_join) {
1096                                         goto join;
1097                                 } else {
1098                                         if (inode != NULL && !IS_ERR(inode)) {
1099                                                 LASSERT(remote);
1100
1101                                                 osd_add_oi_cache(info, dev, id,
1102                                                                  fid);
1103                                                 osd_oii_insert(dev, oic, true);
1104                                         } else {
1105                                                 result = -EINPROGRESS;
1106                                         }
1107                                 }
1108                         } else if (!dev->od_noscrub) {
1109
1110 join:
1111                                 rc1 = osd_scrub_start(dev, flags);
1112                                 LCONSOLE_WARN("%.16s: trigger OI scrub by RPC "
1113                                               "for the "DFID" with flags 0x%x,"
1114                                               " rc = %d\n", osd_name(dev),
1115                                               PFID(fid), flags, rc1);
1116                                 if (rc1 == 0 || rc1 == -EALREADY) {
1117                                         if (inode != NULL && !IS_ERR(inode)) {
1118                                                 LASSERT(remote);
1119
1120                                                 osd_add_oi_cache(info, dev, id,
1121                                                                  fid);
1122                                                 osd_oii_insert(dev, oic, true);
1123                                         } else {
1124                                                 result = -EINPROGRESS;
1125                                         }
1126                                 } else {
1127                                         result = -EREMCHG;
1128                                 }
1129                         } else {
1130                                 result = -EREMCHG;
1131                         }
1132                 }
1133
1134                 if (inode == NULL || IS_ERR(inode))
1135                         GOTO(out, result);
1136         } else if (remote) {
1137                 goto trigger;
1138         }
1139
1140         obj->oo_inode = inode;
1141         LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
1142
1143         result = osd_check_lma(env, obj);
1144         if (result == 0)
1145                 goto found;
1146
1147         LASSERTF(id->oii_ino == inode->i_ino &&
1148                  id->oii_gen == inode->i_generation,
1149                  "locate wrong inode for FID: "DFID", %u/%u => %ld/%u\n",
1150                  PFID(fid), id->oii_ino, id->oii_gen,
1151                  inode->i_ino, inode->i_generation);
1152
1153         saved_ino = inode->i_ino;
1154         saved_gen = inode->i_generation;
1155
1156         if (unlikely(result == -ENODATA)) {
1157                 /* If the OI scrub updated the OI mapping by race, it
1158                  * must be valid. Trust the inode that has no LMA EA. */
1159                 if (updated)
1160                         goto found;
1161
1162                 result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1163                 if (result == 0) {
1164                         /* The OI mapping is still there, the inode is still
1165                          * valid. It is just becaues the inode has no LMA EA. */
1166                         if (saved_ino == id->oii_ino &&
1167                             saved_gen == id->oii_gen)
1168                                 goto found;
1169
1170                         /* It is the OI scrub updated the OI mapping by race.
1171                          * The new OI mapping must be valid. */
1172                         iput(inode);
1173                         inode = NULL;
1174                         obj->oo_inode = NULL;
1175                         trusted = true;
1176                         updated = true;
1177                         goto iget;
1178                 }
1179
1180                 /* "result == -ENOENT" means that the OI mappinghas been
1181                  * removed by race, so the inode belongs to other object.
1182                  *
1183                  * Others error can be returned  directly. */
1184                 if (result == -ENOENT) {
1185                         LASSERT(trusted);
1186
1187                         result = 0;
1188                 }
1189         }
1190
1191         iput(inode);
1192         inode = NULL;
1193         obj->oo_inode = NULL;
1194
1195         if (result != -EREMCHG)
1196                 GOTO(out, result);
1197
1198         LASSERT(!updated);
1199
1200         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1201         /* "result == -ENOENT" means the cached OI mapping has been removed
1202          * from the OI file by race, above inode belongs to other object. */
1203         if (result == -ENOENT) {
1204                 LASSERT(trusted);
1205
1206                 GOTO(out, result = 0);
1207         }
1208
1209         if (result != 0)
1210                 GOTO(out, result);
1211
1212         if (saved_ino == id->oii_ino && saved_gen == id->oii_gen)
1213                 goto trigger;
1214
1215         /* It is the OI scrub updated the OI mapping by race.
1216          * The new OI mapping must be valid. */
1217         trusted = true;
1218         updated = true;
1219         goto iget;
1220
1221 found:
1222         obj->oo_compat_dot_created = 1;
1223         obj->oo_compat_dotdot_created = 1;
1224
1225         if (S_ISDIR(inode->i_mode) &&
1226             (flags & SS_AUTO_PARTIAL || sf->sf_status == SS_SCANNING))
1227                 osd_check_lmv(info, dev, inode, oic);
1228
1229         result = osd_attach_jinode(inode);
1230         if (result) {
1231                 obj->oo_inode = NULL;
1232                 iput(inode);
1233                 GOTO(out, result);
1234         }
1235
1236         if (!ldiskfs_pdo)
1237                 GOTO(out, result = 0);
1238
1239         LASSERT(obj->oo_hl_head == NULL);
1240         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
1241         if (obj->oo_hl_head == NULL) {
1242                 obj->oo_inode = NULL;
1243                 iput(inode);
1244                 GOTO(out, result = -ENOMEM);
1245         }
1246         GOTO(out, result = 0);
1247
1248 out:
1249         if (result != 0 && trusted)
1250                 fid_zero(&oic->oic_fid);
1251
1252         LINVRNT(osd_invariant(obj));
1253         return result;
1254 }
1255
1256 /*
1257  * Concurrency: shouldn't matter.
1258  */
1259 static void osd_object_init0(struct osd_object *obj)
1260 {
1261         LASSERT(obj->oo_inode != NULL);
1262         obj->oo_dt.do_body_ops = &osd_body_ops;
1263         obj->oo_dt.do_lu.lo_header->loh_attr |=
1264                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
1265 }
1266
1267 /*
1268  * Concurrency: no concurrent access is possible that early in object
1269  * life-cycle.
1270  */
1271 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
1272                            const struct lu_object_conf *conf)
1273 {
1274         struct osd_object *obj = osd_obj(l);
1275         int result;
1276
1277         LINVRNT(osd_invariant(obj));
1278
1279         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
1280                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
1281                 l->lo_header->loh_attr |= LOHA_EXISTS;
1282                 return 0;
1283         }
1284
1285         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
1286         obj->oo_dt.do_body_ops = &osd_body_ops_new;
1287         if (result == 0 && obj->oo_inode != NULL) {
1288                 struct osd_thread_info *oti = osd_oti_get(env);
1289                 struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
1290
1291                 osd_object_init0(obj);
1292                 result = osd_get_lma(oti, obj->oo_inode,
1293                                      &oti->oti_obj_dentry, loa);
1294                 if (!result) {
1295                         /* Convert LMAI flags to lustre LMA flags
1296                          * and cache it to oo_lma_flags */
1297                         obj->oo_lma_flags =
1298                                 lma_to_lustre_flags(loa->loa_lma.lma_incompat);
1299                 } else if (result == -ENODATA) {
1300                         result = 0;
1301                 }
1302         }
1303
1304         LINVRNT(osd_invariant(obj));
1305         return result;
1306 }
1307
1308 /* The first part of oxe_buf is xattr name, and is '\0' terminated.
1309  * The left part is for value, binary mode. */
1310 struct osd_xattr_entry {
1311         struct list_head        oxe_list;
1312         size_t                  oxe_len;
1313         size_t                  oxe_namelen;
1314         bool                    oxe_exist;
1315         struct rcu_head         oxe_rcu;
1316         char                    oxe_buf[0];
1317 };
1318
1319 static int osd_oxc_get(struct osd_object *obj, const char *name,
1320                        struct lu_buf *buf)
1321 {
1322         struct osd_xattr_entry *tmp;
1323         struct osd_xattr_entry *oxe = NULL;
1324         size_t namelen = strlen(name);
1325         int rc;
1326         ENTRY;
1327
1328         rcu_read_lock();
1329         list_for_each_entry_rcu(tmp, &obj->oo_xattr_list, oxe_list) {
1330                 if (namelen == tmp->oxe_namelen &&
1331                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1332                         oxe = tmp;
1333                         break;
1334                 }
1335         }
1336
1337         if (oxe == NULL)
1338                 GOTO(out, rc = -ENOENT);
1339
1340         if (!oxe->oxe_exist)
1341                 GOTO(out, rc = -ENODATA);
1342
1343         /* vallen */
1344         rc = oxe->oxe_len - sizeof(*oxe) - oxe->oxe_namelen - 1;
1345         LASSERT(rc > 0);
1346
1347         if (buf->lb_buf == NULL)
1348                 GOTO(out, rc);
1349
1350         if (buf->lb_len < rc)
1351                 GOTO(out, rc = -ERANGE);
1352
1353         memcpy(buf->lb_buf, &oxe->oxe_buf[namelen + 1], rc);
1354         EXIT;
1355 out:
1356         rcu_read_unlock();
1357
1358         return rc;
1359 }
1360
1361 static void osd_oxc_free(struct rcu_head *head)
1362 {
1363         struct osd_xattr_entry *oxe;
1364
1365         oxe = container_of(head, struct osd_xattr_entry, oxe_rcu);
1366         OBD_FREE(oxe, oxe->oxe_len);
1367 }
1368
1369 static void osd_oxc_add(struct osd_object *obj, const char *name,
1370                         const char *buf, int buflen)
1371 {
1372         struct osd_xattr_entry *oxe;
1373         struct osd_xattr_entry *old = NULL;
1374         struct osd_xattr_entry *tmp;
1375         size_t namelen = strlen(name);
1376         size_t len = sizeof(*oxe) + namelen + 1 + buflen;
1377
1378         OBD_ALLOC(oxe, len);
1379         if (oxe == NULL)
1380                 return;
1381
1382         INIT_LIST_HEAD(&oxe->oxe_list);
1383         oxe->oxe_len = len;
1384         oxe->oxe_namelen = namelen;
1385         memcpy(oxe->oxe_buf, name, namelen);
1386         if (buflen > 0) {
1387                 LASSERT(buf != NULL);
1388                 memcpy(oxe->oxe_buf + namelen + 1, buf, buflen);
1389                 oxe->oxe_exist = true;
1390         } else {
1391                 oxe->oxe_exist = false;
1392         }
1393
1394         /* this should be rarely called, just remove old and add new */
1395         spin_lock(&obj->oo_guard);
1396         list_for_each_entry(tmp, &obj->oo_xattr_list, oxe_list) {
1397                 if (namelen == tmp->oxe_namelen &&
1398                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1399                         old = tmp;
1400                         break;
1401                 }
1402         }
1403         if (old != NULL) {
1404                 list_replace_rcu(&old->oxe_list, &oxe->oxe_list);
1405                 call_rcu(&old->oxe_rcu, osd_oxc_free);
1406         } else {
1407                 list_add_tail_rcu(&oxe->oxe_list, &obj->oo_xattr_list);
1408         }
1409         spin_unlock(&obj->oo_guard);
1410 }
1411
1412 static void osd_oxc_del(struct osd_object *obj, const char *name)
1413 {
1414         struct osd_xattr_entry *oxe;
1415         size_t namelen = strlen(name);
1416
1417         spin_lock(&obj->oo_guard);
1418         list_for_each_entry(oxe, &obj->oo_xattr_list, oxe_list) {
1419                 if (namelen == oxe->oxe_namelen &&
1420                     strncmp(name, oxe->oxe_buf, namelen) == 0) {
1421                         list_del_rcu(&oxe->oxe_list);
1422                         call_rcu(&oxe->oxe_rcu, osd_oxc_free);
1423                         break;
1424                 }
1425         }
1426         spin_unlock(&obj->oo_guard);
1427 }
1428
1429 static void osd_oxc_fini(struct osd_object *obj)
1430 {
1431         struct osd_xattr_entry *oxe, *next;
1432
1433         list_for_each_entry_safe(oxe, next, &obj->oo_xattr_list, oxe_list) {
1434                 list_del(&oxe->oxe_list);
1435                 OBD_FREE(oxe, oxe->oxe_len);
1436         }
1437 }
1438
1439 /*
1440  * Concurrency: no concurrent access is possible that late in object
1441  * life-cycle.
1442  */
1443 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
1444 {
1445         struct osd_object *obj = osd_obj(l);
1446
1447         LINVRNT(osd_invariant(obj));
1448
1449         osd_oxc_fini(obj);
1450         dt_object_fini(&obj->oo_dt);
1451         if (obj->oo_hl_head != NULL)
1452                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
1453         OBD_FREE_PTR(obj);
1454 }
1455
1456 /*
1457  * Concurrency: no concurrent access is possible that late in object
1458  * life-cycle.
1459  */
1460 static void osd_index_fini(struct osd_object *o)
1461 {
1462         struct iam_container *bag;
1463
1464         if (o->oo_dir != NULL) {
1465                 bag = &o->oo_dir->od_container;
1466                 if (o->oo_inode != NULL) {
1467                         if (bag->ic_object == o->oo_inode)
1468                                 iam_container_fini(bag);
1469                 }
1470                 OBD_FREE_PTR(o->oo_dir);
1471                 o->oo_dir = NULL;
1472         }
1473 }
1474
1475 /*
1476  * Concurrency: no concurrent access is possible that late in object
1477  * life-cycle (for all existing callers, that is. New callers have to provide
1478  * their own locking.)
1479  */
1480 static int osd_inode_unlinked(const struct inode *inode)
1481 {
1482         return inode->i_nlink == 0;
1483 }
1484
1485 enum {
1486         OSD_TXN_OI_DELETE_CREDITS    = 20,
1487         OSD_TXN_INODE_DELETE_CREDITS = 20
1488 };
1489
1490 /*
1491  * Journal
1492  */
1493
1494 #if OSD_THANDLE_STATS
1495 /**
1496  * Set time when the handle is allocated
1497  */
1498 static void osd_th_alloced(struct osd_thandle *oth)
1499 {
1500         oth->oth_alloced = ktime_get();
1501 }
1502
1503 /**
1504  * Set time when the handle started
1505  */
1506 static void osd_th_started(struct osd_thandle *oth)
1507 {
1508         oth->oth_started = ktime_get();
1509 }
1510
1511 /**
1512  * Check whether the we deal with this handle for too long.
1513  */
1514 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
1515                                 ktime_t alloced, ktime_t started,
1516                                 ktime_t closed)
1517 {
1518         ktime_t now = ktime_get();
1519
1520         LASSERT(dev != NULL);
1521
1522         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
1523                             ktime_us_delta(started, alloced));
1524         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
1525                             ktime_us_delta(closed, started));
1526         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
1527                             ktime_us_delta(now, closed));
1528
1529         if (ktime_before(ktime_add_ns(alloced, 30 * NSEC_PER_SEC), now)) {
1530                 CWARN("transaction handle %p was open for too long: now %lld, alloced %lld, started %lld, closed %lld\n",
1531                       oth, now, alloced, started, closed);
1532                 libcfs_debug_dumpstack(NULL);
1533         }
1534 }
1535
1536 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
1537 {                                                                       \
1538         ktime_t __closed = ktime_get();                                 \
1539         ktime_t __alloced = oth->oth_alloced;                           \
1540         ktime_t __started = oth->oth_started;                           \
1541                                                                         \
1542         expr;                                                           \
1543         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
1544 }
1545
1546 #else /* OSD_THANDLE_STATS */
1547
1548 #define osd_th_alloced(h)                  do {} while(0)
1549 #define osd_th_started(h)                  do {} while(0)
1550 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
1551
1552 #endif /* OSD_THANDLE_STATS */
1553
1554 /*
1555  * Concurrency: doesn't access mutable data.
1556  */
1557 static int osd_param_is_not_sane(const struct osd_device *dev,
1558                                  const struct thandle *th)
1559 {
1560         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
1561
1562         return oh->ot_credits > osd_transaction_size(dev);
1563 }
1564
1565 /*
1566  * Concurrency: shouldn't matter.
1567  */
1568 static void osd_trans_commit_cb(struct super_block *sb,
1569                                 struct ldiskfs_journal_cb_entry *jcb, int error)
1570 {
1571         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
1572         struct thandle     *th  = &oh->ot_super;
1573         struct lu_device   *lud = &th->th_dev->dd_lu_dev;
1574         struct dt_txn_commit_cb *dcb, *tmp;
1575
1576         LASSERT(oh->ot_handle == NULL);
1577
1578         if (error)
1579                 CERROR("transaction @0x%p commit error: %d\n", th, error);
1580
1581         dt_txn_hook_commit(th);
1582
1583         /* call per-transaction callbacks if any */
1584         list_for_each_entry_safe(dcb, tmp, &oh->ot_commit_dcb_list,
1585                                  dcb_linkage) {
1586                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
1587                          "commit callback entry: magic=%x name='%s'\n",
1588                          dcb->dcb_magic, dcb->dcb_name);
1589                 list_del_init(&dcb->dcb_linkage);
1590                 dcb->dcb_func(NULL, th, dcb, error);
1591         }
1592
1593         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
1594         lu_device_put(lud);
1595         th->th_dev = NULL;
1596
1597         lu_context_exit(&th->th_ctx);
1598         lu_context_fini(&th->th_ctx);
1599         OBD_FREE_PTR(oh);
1600 }
1601
1602 #ifndef HAVE_SB_START_WRITE
1603 # define sb_start_write(sb) do {} while (0)
1604 # define sb_end_write(sb) do {} while (0)
1605 #endif
1606
1607 static struct thandle *osd_trans_create(const struct lu_env *env,
1608                                         struct dt_device *d)
1609 {
1610         struct osd_thread_info  *oti = osd_oti_get(env);
1611         struct osd_iobuf        *iobuf = &oti->oti_iobuf;
1612         struct osd_thandle      *oh;
1613         struct thandle          *th;
1614         ENTRY;
1615
1616         if (d->dd_rdonly) {
1617                 CERROR("%s: someone try to start transaction under "
1618                        "readonly mode, should be disabled.\n",
1619                        osd_name(osd_dt_dev(d)));
1620                 dump_stack();
1621                 RETURN(ERR_PTR(-EROFS));
1622         }
1623
1624         /* on pending IO in this thread should left from prev. request */
1625         LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
1626
1627         sb_start_write(osd_sb(osd_dt_dev(d)));
1628
1629         OBD_ALLOC_GFP(oh, sizeof *oh, GFP_NOFS);
1630         if (oh != NULL) {
1631                 oh->ot_quota_trans = &oti->oti_quota_trans;
1632                 memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
1633                 th = &oh->ot_super;
1634                 th->th_dev = d;
1635                 th->th_result = 0;
1636                 th->th_tags = LCT_TX_HANDLE;
1637                 oh->ot_credits = 0;
1638                 INIT_LIST_HEAD(&oh->ot_commit_dcb_list);
1639                 INIT_LIST_HEAD(&oh->ot_stop_dcb_list);
1640                 osd_th_alloced(oh);
1641
1642                 memset(oti->oti_declare_ops, 0,
1643                        sizeof(oti->oti_declare_ops));
1644                 memset(oti->oti_declare_ops_cred, 0,
1645                        sizeof(oti->oti_declare_ops_cred));
1646                 memset(oti->oti_declare_ops_used, 0,
1647                        sizeof(oti->oti_declare_ops_used));
1648         } else {
1649                 sb_end_write(osd_sb(osd_dt_dev(d)));
1650                 th = ERR_PTR(-ENOMEM);
1651         }
1652         RETURN(th);
1653 }
1654
1655 void osd_trans_dump_creds(const struct lu_env *env, struct thandle *th)
1656 {
1657         struct osd_thread_info  *oti = osd_oti_get(env);
1658         struct osd_thandle      *oh;
1659
1660         oh = container_of0(th, struct osd_thandle, ot_super);
1661         LASSERT(oh != NULL);
1662
1663         CWARN("  create: %u/%u/%u, destroy: %u/%u/%u\n",
1664               oti->oti_declare_ops[OSD_OT_CREATE],
1665               oti->oti_declare_ops_cred[OSD_OT_CREATE],
1666               oti->oti_declare_ops_used[OSD_OT_CREATE],
1667               oti->oti_declare_ops[OSD_OT_DESTROY],
1668               oti->oti_declare_ops_cred[OSD_OT_DESTROY],
1669               oti->oti_declare_ops_used[OSD_OT_DESTROY]);
1670         CWARN("  attr_set: %u/%u/%u, xattr_set: %u/%u/%u\n",
1671               oti->oti_declare_ops[OSD_OT_ATTR_SET],
1672               oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
1673               oti->oti_declare_ops_used[OSD_OT_ATTR_SET],
1674               oti->oti_declare_ops[OSD_OT_XATTR_SET],
1675               oti->oti_declare_ops_cred[OSD_OT_XATTR_SET],
1676               oti->oti_declare_ops_used[OSD_OT_XATTR_SET]);
1677         CWARN("  write: %u/%u/%u, punch: %u/%u/%u, quota %u/%u/%u\n",
1678               oti->oti_declare_ops[OSD_OT_WRITE],
1679               oti->oti_declare_ops_cred[OSD_OT_WRITE],
1680               oti->oti_declare_ops_used[OSD_OT_WRITE],
1681               oti->oti_declare_ops[OSD_OT_PUNCH],
1682               oti->oti_declare_ops_cred[OSD_OT_PUNCH],
1683               oti->oti_declare_ops_used[OSD_OT_PUNCH],
1684               oti->oti_declare_ops[OSD_OT_QUOTA],
1685               oti->oti_declare_ops_cred[OSD_OT_QUOTA],
1686               oti->oti_declare_ops_used[OSD_OT_QUOTA]);
1687         CWARN("  insert: %u/%u/%u, delete: %u/%u/%u\n",
1688               oti->oti_declare_ops[OSD_OT_INSERT],
1689               oti->oti_declare_ops_cred[OSD_OT_INSERT],
1690               oti->oti_declare_ops_used[OSD_OT_INSERT],
1691               oti->oti_declare_ops[OSD_OT_DELETE],
1692               oti->oti_declare_ops_cred[OSD_OT_DELETE],
1693               oti->oti_declare_ops_used[OSD_OT_DELETE]);
1694         CWARN("  ref_add: %u/%u/%u, ref_del: %u/%u/%u\n",
1695               oti->oti_declare_ops[OSD_OT_REF_ADD],
1696               oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
1697               oti->oti_declare_ops_used[OSD_OT_REF_ADD],
1698               oti->oti_declare_ops[OSD_OT_REF_DEL],
1699               oti->oti_declare_ops_cred[OSD_OT_REF_DEL],
1700               oti->oti_declare_ops_used[OSD_OT_REF_DEL]);
1701 }
1702
1703 /*
1704  * Concurrency: shouldn't matter.
1705  */
1706 static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
1707                            struct thandle *th)
1708 {
1709         struct osd_thread_info *oti = osd_oti_get(env);
1710         struct osd_device  *dev = osd_dt_dev(d);
1711         handle_t           *jh;
1712         struct osd_thandle *oh;
1713         int rc;
1714
1715         ENTRY;
1716
1717         LASSERT(current->journal_info == NULL);
1718
1719         oh = container_of0(th, struct osd_thandle, ot_super);
1720         LASSERT(oh != NULL);
1721         LASSERT(oh->ot_handle == NULL);
1722
1723         rc = dt_txn_hook_start(env, d, th);
1724         if (rc != 0)
1725                 GOTO(out, rc);
1726
1727         if (unlikely(osd_param_is_not_sane(dev, th))) {
1728                 static unsigned long last_printed;
1729                 static int last_credits;
1730
1731                 /* don't make noise on a tiny testing systems
1732                  * actual credits misuse will be caught anyway */
1733                 if (last_credits != oh->ot_credits &&
1734                     time_after(jiffies, last_printed +
1735                                msecs_to_jiffies(60 * MSEC_PER_SEC)) &&
1736                     osd_transaction_size(dev) > 512) {
1737                         CWARN("%s: credits %u > trans_max %u\n", osd_name(dev),
1738                               oh->ot_credits, osd_transaction_size(dev));
1739                         osd_trans_dump_creds(env, th);
1740                         libcfs_debug_dumpstack(NULL);
1741                         last_credits = oh->ot_credits;
1742                         last_printed = jiffies;
1743                 }
1744                 /* XXX Limit the credits to 'max_transaction_buffers', and
1745                  *     let the underlying filesystem to catch the error if
1746                  *     we really need so many credits.
1747                  *
1748                  *     This should be removed when we can calculate the
1749                  *     credits precisely. */
1750                 oh->ot_credits = osd_transaction_size(dev);
1751         } else if (ldiskfs_track_declares_assert != 0) {
1752                 /* reserve few credits to prevent an assertion in JBD
1753                  * our debugging mechanism will be able to detected
1754                  * overuse. this can help to debug single-update
1755                  * transactions */
1756                 oh->ot_credits += 10;
1757                 if (unlikely(osd_param_is_not_sane(dev, th)))
1758                         oh->ot_credits = osd_transaction_size(dev);
1759         }
1760
1761         /*
1762          * XXX temporary stuff. Some abstraction layer should
1763          * be used.
1764          */
1765         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
1766         osd_th_started(oh);
1767         if (!IS_ERR(jh)) {
1768                 oh->ot_handle = jh;
1769                 LASSERT(oti->oti_txns == 0);
1770                 lu_context_init(&th->th_ctx, th->th_tags);
1771                 lu_context_enter(&th->th_ctx);
1772
1773                 lu_device_get(&d->dd_lu_dev);
1774                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
1775                               "osd-tx", th);
1776                 oti->oti_txns++;
1777                 rc = 0;
1778         } else {
1779                 rc = PTR_ERR(jh);
1780         }
1781 out:
1782         RETURN(rc);
1783 }
1784
1785 static int osd_seq_exists(const struct lu_env *env,
1786                           struct osd_device *osd, u64 seq)
1787 {
1788         struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
1789         struct seq_server_site  *ss = osd_seq_site(osd);
1790         int                     rc;
1791         ENTRY;
1792
1793         LASSERT(ss != NULL);
1794         LASSERT(ss->ss_server_fld != NULL);
1795
1796         rc = osd_fld_lookup(env, osd, seq, range);
1797         if (rc != 0) {
1798                 if (rc != -ENOENT)
1799                         CERROR("%s: can't lookup FLD sequence %#llx: rc = %d\n",
1800                                osd_name(osd), seq, rc);
1801                 RETURN(0);
1802         }
1803
1804         RETURN(ss->ss_node_id == range->lsr_index);
1805 }
1806
1807 static void osd_trans_stop_cb(struct osd_thandle *oth, int result)
1808 {
1809         struct dt_txn_commit_cb *dcb;
1810         struct dt_txn_commit_cb *tmp;
1811
1812         /* call per-transaction stop callbacks if any */
1813         list_for_each_entry_safe(dcb, tmp, &oth->ot_stop_dcb_list,
1814                                  dcb_linkage) {
1815                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
1816                          "commit callback entry: magic=%x name='%s'\n",
1817                          dcb->dcb_magic, dcb->dcb_name);
1818                 list_del_init(&dcb->dcb_linkage);
1819                 dcb->dcb_func(NULL, &oth->ot_super, dcb, result);
1820         }
1821 }
1822
1823 /*
1824  * Concurrency: shouldn't matter.
1825  */
1826 static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
1827                           struct thandle *th)
1828 {
1829         int                     rc = 0, remove_agents = 0;
1830         struct osd_thandle     *oh;
1831         struct osd_thread_info *oti = osd_oti_get(env);
1832         struct osd_iobuf       *iobuf = &oti->oti_iobuf;
1833         struct osd_device      *osd = osd_dt_dev(th->th_dev);
1834         struct qsd_instance    *qsd = osd->od_quota_slave;
1835         struct lquota_trans    *qtrans;
1836         ENTRY;
1837
1838         oh = container_of0(th, struct osd_thandle, ot_super);
1839
1840         /* reset OI cache for safety */
1841         oti->oti_ins_cache_used = 0;
1842
1843         remove_agents = oh->ot_remove_agents;
1844
1845         qtrans = oh->ot_quota_trans;
1846         oh->ot_quota_trans = NULL;
1847
1848         if (oh->ot_handle != NULL) {
1849                 int rc2;
1850                 handle_t *hdl = oh->ot_handle;
1851
1852                 /*
1853                  * add commit callback
1854                  * notice we don't do this in osd_trans_start()
1855                  * as underlying transaction can change during truncate
1856                  */
1857                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
1858                                          &oh->ot_jcb);
1859
1860                 LASSERT(oti->oti_txns == 1);
1861                 oti->oti_txns--;
1862
1863                 rc = dt_txn_hook_stop(env, th);
1864                 if (rc != 0)
1865                         CERROR("%s: failed in transaction hook: rc = %d\n",
1866                                osd_name(osd), rc);
1867
1868                 osd_trans_stop_cb(oh, rc);
1869                 /* hook functions might modify th_sync */
1870                 hdl->h_sync = th->th_sync;
1871
1872                 oh->ot_handle = NULL;
1873                 OSD_CHECK_SLOW_TH(oh, osd, rc2 = ldiskfs_journal_stop(hdl));
1874                 if (rc2 != 0)
1875                         CERROR("%s: failed to stop transaction: rc = %d\n",
1876                                osd_name(osd), rc2);
1877                 if (!rc)
1878                         rc = rc2;
1879         } else {
1880                 osd_trans_stop_cb(oh, th->th_result);
1881                 OBD_FREE_PTR(oh);
1882         }
1883
1884         /* inform the quota slave device that the transaction is stopping */
1885         qsd_op_end(env, qsd, qtrans);
1886
1887         /* as we want IO to journal and data IO be concurrent, we don't block
1888          * awaiting data IO completion in osd_do_bio(), instead we wait here
1889          * once transaction is submitted to the journal. all reqular requests
1890          * don't do direct IO (except read/write), thus this wait_event becomes
1891          * no-op for them.
1892          *
1893          * IMPORTANT: we have to wait till any IO submited by the thread is
1894          * completed otherwise iobuf may be corrupted by different request
1895          */
1896         wait_event(iobuf->dr_wait,
1897                        atomic_read(&iobuf->dr_numreqs) == 0);
1898         osd_fini_iobuf(osd, iobuf);
1899         if (!rc)
1900                 rc = iobuf->dr_error;
1901
1902         if (unlikely(remove_agents != 0))
1903                 osd_process_scheduled_agent_removals(env, osd);
1904
1905         sb_end_write(osd_sb(osd));
1906
1907         RETURN(rc);
1908 }
1909
1910 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
1911 {
1912         struct osd_thandle *oh = container_of0(th, struct osd_thandle,
1913                                                ot_super);
1914
1915         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
1916         LASSERT(&dcb->dcb_func != NULL);
1917         if (dcb->dcb_flags & DCB_TRANS_STOP)
1918                 list_add(&dcb->dcb_linkage, &oh->ot_stop_dcb_list);
1919         else
1920                 list_add(&dcb->dcb_linkage, &oh->ot_commit_dcb_list);
1921
1922         return 0;
1923 }
1924
1925 /*
1926  * Called just before object is freed. Releases all resources except for
1927  * object itself (that is released by osd_object_free()).
1928  *
1929  * Concurrency: no concurrent access is possible that late in object
1930  * life-cycle.
1931  */
1932 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
1933 {
1934         struct osd_object *obj   = osd_obj(l);
1935         struct inode      *inode = obj->oo_inode;
1936
1937         LINVRNT(osd_invariant(obj));
1938
1939         /*
1940          * If object is unlinked remove fid->ino mapping from object index.
1941          */
1942
1943         osd_index_fini(obj);
1944         if (inode != NULL) {
1945                 struct qsd_instance     *qsd = osd_obj2dev(obj)->od_quota_slave;
1946                 qid_t                    uid = i_uid_read(inode);
1947                 qid_t                    gid = i_gid_read(inode);
1948
1949                 iput(inode);
1950                 obj->oo_inode = NULL;
1951
1952                 if (qsd != NULL) {
1953                         struct osd_thread_info  *info = osd_oti_get(env);
1954                         struct lquota_id_info   *qi = &info->oti_qi;
1955
1956                         /* Release granted quota to master if necessary */
1957                         qi->lqi_id.qid_uid = uid;
1958                         qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
1959
1960                         qi->lqi_id.qid_uid = gid;
1961                         qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
1962
1963                         qi->lqi_id.qid_uid = i_projid_read(inode);
1964                         qsd_op_adjust(env, qsd, &qi->lqi_id, PRJQUOTA);
1965                 }
1966         }
1967 }
1968
1969 /*
1970  * Concurrency: ->loo_object_release() is called under site spin-lock.
1971  */
1972 static void osd_object_release(const struct lu_env *env,
1973                                struct lu_object *l)
1974 {
1975         struct osd_object *o = osd_obj(l);
1976         /* nobody should be releasing a non-destroyed object with nlink=0
1977          * the API allows this, but ldiskfs doesn't like and then report
1978          * this inode as deleted */
1979         if (unlikely(!o->oo_destroyed && o->oo_inode && o->oo_inode->i_nlink == 0))
1980                 LBUG();
1981 }
1982
1983 /*
1984  * Concurrency: shouldn't matter.
1985  */
1986 static int osd_object_print(const struct lu_env *env, void *cookie,
1987                             lu_printer_t p, const struct lu_object *l)
1988 {
1989         struct osd_object *o = osd_obj(l);
1990         struct iam_descr  *d;
1991
1992         if (o->oo_dir != NULL)
1993                 d = o->oo_dir->od_container.ic_descr;
1994         else
1995                 d = NULL;
1996         return (*p)(env, cookie,
1997                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
1998                     o, o->oo_inode,
1999                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
2000                     o->oo_inode ? o->oo_inode->i_generation : 0,
2001                     d ? d->id_ops->id_name : "plain");
2002 }
2003
2004 /*
2005  * Concurrency: shouldn't matter.
2006  */
2007 int osd_statfs(const struct lu_env *env, struct dt_device *d,
2008                struct obd_statfs *sfs)
2009 {
2010         struct osd_device       *osd = osd_dt_dev(d);
2011         struct super_block      *sb = osd_sb(osd);
2012         struct kstatfs          *ksfs;
2013         __u64                    reserved;
2014         int                      result = 0;
2015
2016         if (unlikely(osd->od_mnt == NULL))
2017                 return -EINPROGRESS;
2018
2019         /* osd_lproc.c call this without env, allocate ksfs for that case */
2020         if (unlikely(env == NULL)) {
2021                 OBD_ALLOC_PTR(ksfs);
2022                 if (ksfs == NULL)
2023                         return -ENOMEM;
2024         } else {
2025                 ksfs = &osd_oti_get(env)->oti_ksfs;
2026         }
2027
2028         result = sb->s_op->statfs(sb->s_root, ksfs);
2029         if (result)
2030                 goto out;
2031
2032         statfs_pack(sfs, ksfs);
2033         if (unlikely(sb->s_flags & MS_RDONLY))
2034                 sfs->os_state |= OS_STATE_READONLY;
2035         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb,
2036                                          LDISKFS_FEATURE_INCOMPAT_EXTENTS))
2037                 sfs->os_maxbytes = sb->s_maxbytes;
2038         else
2039                 sfs->os_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2040
2041         /*
2042          * Reserve some space so to avoid fragmenting the filesystem too much.
2043          * Fragmentation not only impacts performance, but can also increase
2044          * metadata overhead significantly, causing grant calculation to be
2045          * wrong.
2046          *
2047          * Reserve 0.78% of total space, at least 8MB for small filesystems.
2048          */
2049         CLASSERT(OSD_STATFS_RESERVED > LDISKFS_MAX_BLOCK_SIZE);
2050         reserved = OSD_STATFS_RESERVED >> sb->s_blocksize_bits;
2051         if (likely(sfs->os_blocks >= reserved << OSD_STATFS_RESERVED_SHIFT))
2052                 reserved = sfs->os_blocks >> OSD_STATFS_RESERVED_SHIFT;
2053
2054         sfs->os_blocks -= reserved;
2055         sfs->os_bfree  -= min(reserved, sfs->os_bfree);
2056         sfs->os_bavail -= min(reserved, sfs->os_bavail);
2057
2058 out:
2059         if (unlikely(env == NULL))
2060                 OBD_FREE_PTR(ksfs);
2061         return result;
2062 }
2063
2064 /**
2065  * Estimate space needed for file creations. We assume the largest filename
2066  * which is 2^64 - 1, hence a filename of 20 chars.
2067  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
2068  */
2069 #ifdef __LDISKFS_DIR_REC_LEN
2070 #define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
2071 #else
2072 #define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
2073 #endif
2074
2075 /*
2076  * Concurrency: doesn't access mutable data.
2077  */
2078 static void osd_conf_get(const struct lu_env *env,
2079                          const struct dt_device *dev,
2080                          struct dt_device_param *param)
2081 {
2082         struct super_block *sb = osd_sb(osd_dt_dev(dev));
2083         int                ea_overhead;
2084
2085         /*
2086          * XXX should be taken from not-yet-existing fs abstraction layer.
2087          */
2088         param->ddp_max_name_len = LDISKFS_NAME_LEN;
2089         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
2090         param->ddp_symlink_max  = sb->s_blocksize;
2091         param->ddp_mount_type     = LDD_MT_LDISKFS;
2092         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EXTENTS))
2093                 param->ddp_maxbytes = sb->s_maxbytes;
2094         else
2095                 param->ddp_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2096         /* inode are statically allocated, so per-inode space consumption
2097          * is the space consumed by the directory entry */
2098         param->ddp_inodespace     = PER_OBJ_USAGE;
2099         /* EXT_INIT_MAX_LEN is the theoretical maximum extent size  (32k blocks
2100          * = 128MB) which is unlikely to be hit in real life. Report a smaller
2101          * maximum length to not under count the actual number of extents
2102          * needed for writing a file. */
2103         param->ddp_max_extent_blks = EXT_INIT_MAX_LEN >> 2;
2104         /* worst-case extent insertion metadata overhead */
2105         param->ddp_extent_tax = 6 * LDISKFS_BLOCK_SIZE(sb);
2106         param->ddp_mntopts      = 0;
2107         if (test_opt(sb, XATTR_USER))
2108                 param->ddp_mntopts |= MNTOPT_USERXATTR;
2109         if (test_opt(sb, POSIX_ACL))
2110                 param->ddp_mntopts |= MNTOPT_ACL;
2111
2112         /* LOD might calculate the max stripe count based on max_ea_size,
2113          * so we need take account in the overhead as well,
2114          * xattr_header + magic + xattr_entry_head */
2115         ea_overhead = sizeof(struct ldiskfs_xattr_header) + sizeof(__u32) +
2116                       LDISKFS_XATTR_LEN(XATTR_NAME_MAX_LEN);
2117
2118 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
2119         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EA_INODE))
2120                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE -
2121                                                                 ea_overhead;
2122         else
2123 #endif
2124                 param->ddp_max_ea_size = sb->s_blocksize - ea_overhead;
2125 }
2126
2127 /*
2128  * Concurrency: shouldn't matter.
2129  */
2130 static int osd_sync(const struct lu_env *env, struct dt_device *d)
2131 {
2132         int rc;
2133
2134         CDEBUG(D_CACHE, "syncing OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
2135
2136         rc = ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
2137
2138         CDEBUG(D_CACHE, "synced OSD %s: rc = %d\n",
2139                LUSTRE_OSD_LDISKFS_NAME, rc);
2140
2141         return rc;
2142 }
2143
2144 /**
2145  * Start commit for OSD device.
2146  *
2147  * An implementation of dt_commit_async method for OSD device.
2148  * Asychronously starts underlayng fs sync and thereby a transaction
2149  * commit.
2150  *
2151  * \param env environment
2152  * \param d dt device
2153  *
2154  * \see dt_device_operations
2155  */
2156 static int osd_commit_async(const struct lu_env *env,
2157                             struct dt_device *d)
2158 {
2159         struct super_block *s = osd_sb(osd_dt_dev(d));
2160         ENTRY;
2161
2162         CDEBUG(D_HA, "async commit OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
2163         RETURN(s->s_op->sync_fs(s, 0));
2164 }
2165
2166 /*
2167  * Concurrency: shouldn't matter.
2168  */
2169
2170 static int osd_ro(const struct lu_env *env, struct dt_device *d)
2171 {
2172         struct super_block *sb = osd_sb(osd_dt_dev(d));
2173         struct block_device *dev = sb->s_bdev;
2174 #ifdef HAVE_DEV_SET_RDONLY
2175         struct block_device *jdev = LDISKFS_SB(sb)->journal_bdev;
2176         int rc = 0;
2177 #else
2178         int rc = -EOPNOTSUPP;
2179 #endif
2180         ENTRY;
2181
2182 #ifdef HAVE_DEV_SET_RDONLY
2183         CERROR("*** setting %s read-only ***\n", osd_dt_dev(d)->od_svname);
2184
2185         if (sb->s_op->freeze_fs) {
2186                 rc = sb->s_op->freeze_fs(sb);
2187                 if (rc)
2188                         goto out;
2189         }
2190
2191         if (jdev && (jdev != dev)) {
2192                 CDEBUG(D_IOCTL | D_HA, "set journal dev %lx rdonly\n",
2193                        (long)jdev);
2194                 dev_set_rdonly(jdev);
2195         }
2196         CDEBUG(D_IOCTL | D_HA, "set dev %lx rdonly\n", (long)dev);
2197         dev_set_rdonly(dev);
2198
2199         if (sb->s_op->unfreeze_fs)
2200                 sb->s_op->unfreeze_fs(sb);
2201
2202 out:
2203 #endif
2204         if (rc)
2205                 CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
2206                        osd_dt_dev(d)->od_svname, (long)dev, rc);
2207
2208         RETURN(rc);
2209 }
2210
2211 /**
2212  * Note: we do not count into QUOTA here.
2213  * If we mount with --data_journal we may need more.
2214  */
2215 const int osd_dto_credits_noquota[DTO_NR] = {
2216         /**
2217          * Insert.
2218          * INDEX_EXTRA_TRANS_BLOCKS(8) +
2219          * SINGLEDATA_TRANS_BLOCKS(8)
2220          * XXX Note: maybe iam need more, since iam have more level than
2221          *           EXT3 htree.
2222          */
2223         [DTO_INDEX_INSERT]  = 16,
2224         /**
2225          * Delete
2226          * just modify a single entry, probably merge few within a block
2227          */
2228         [DTO_INDEX_DELETE]  = 1,
2229         /**
2230          * Used for OI scrub
2231          */
2232         [DTO_INDEX_UPDATE]  = 16,
2233         /**
2234          * 4(inode, inode bits, groups, GDT)
2235          *   notice: OI updates are counted separately with DTO_INDEX_INSERT
2236          */
2237         [DTO_OBJECT_CREATE] = 4,
2238         /**
2239          * 4(inode, inode bits, groups, GDT)
2240          *   notice: OI updates are counted separately with DTO_INDEX_DELETE
2241          */
2242         [DTO_OBJECT_DELETE] = 4,
2243         /**
2244          * Attr set credits (inode)
2245          */
2246         [DTO_ATTR_SET_BASE] = 1,
2247         /**
2248          * Xattr set. The same as xattr of EXT3.
2249          * DATA_TRANS_BLOCKS(14)
2250          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
2251          * are also counted in. Do not know why?
2252          */
2253         [DTO_XATTR_SET]     = 14,
2254         /**
2255          * credits for inode change during write.
2256          */
2257         [DTO_WRITE_BASE]    = 3,
2258         /**
2259          * credits for single block write.
2260          */
2261         [DTO_WRITE_BLOCK]   = 14,
2262         /**
2263          * Attr set credits for chown.
2264          * This is extra credits for setattr, and it is null without quota
2265          */
2266         [DTO_ATTR_SET_CHOWN] = 0
2267 };
2268
2269 static const struct dt_device_operations osd_dt_ops = {
2270         .dt_root_get       = osd_root_get,
2271         .dt_statfs         = osd_statfs,
2272         .dt_trans_create   = osd_trans_create,
2273         .dt_trans_start    = osd_trans_start,
2274         .dt_trans_stop     = osd_trans_stop,
2275         .dt_trans_cb_add   = osd_trans_cb_add,
2276         .dt_conf_get       = osd_conf_get,
2277         .dt_sync           = osd_sync,
2278         .dt_ro             = osd_ro,
2279         .dt_commit_async   = osd_commit_async,
2280 };
2281
2282 static void osd_object_read_lock(const struct lu_env *env,
2283                                  struct dt_object *dt, unsigned role)
2284 {
2285         struct osd_object *obj = osd_dt_obj(dt);
2286         struct osd_thread_info *oti = osd_oti_get(env);
2287
2288         LINVRNT(osd_invariant(obj));
2289
2290         LASSERT(obj->oo_owner != env);
2291         down_read_nested(&obj->oo_sem, role);
2292
2293         LASSERT(obj->oo_owner == NULL);
2294         oti->oti_r_locks++;
2295 }
2296
2297 static void osd_object_write_lock(const struct lu_env *env,
2298                                   struct dt_object *dt, unsigned role)
2299 {
2300         struct osd_object *obj = osd_dt_obj(dt);
2301         struct osd_thread_info *oti = osd_oti_get(env);
2302
2303         LINVRNT(osd_invariant(obj));
2304
2305         LASSERT(obj->oo_owner != env);
2306         down_write_nested(&obj->oo_sem, role);
2307
2308         LASSERT(obj->oo_owner == NULL);
2309         obj->oo_owner = env;
2310         oti->oti_w_locks++;
2311 }
2312
2313 static void osd_object_read_unlock(const struct lu_env *env,
2314                                    struct dt_object *dt)
2315 {
2316         struct osd_object *obj = osd_dt_obj(dt);
2317         struct osd_thread_info *oti = osd_oti_get(env);
2318
2319         LINVRNT(osd_invariant(obj));
2320
2321         LASSERT(oti->oti_r_locks > 0);
2322         oti->oti_r_locks--;
2323         up_read(&obj->oo_sem);
2324 }
2325
2326 static void osd_object_write_unlock(const struct lu_env *env,
2327                                     struct dt_object *dt)
2328 {
2329         struct osd_object *obj = osd_dt_obj(dt);
2330         struct osd_thread_info *oti = osd_oti_get(env);
2331
2332         LINVRNT(osd_invariant(obj));
2333
2334         LASSERT(obj->oo_owner == env);
2335         LASSERT(oti->oti_w_locks > 0);
2336         oti->oti_w_locks--;
2337         obj->oo_owner = NULL;
2338         up_write(&obj->oo_sem);
2339 }
2340
2341 static int osd_object_write_locked(const struct lu_env *env,
2342                                    struct dt_object *dt)
2343 {
2344         struct osd_object *obj = osd_dt_obj(dt);
2345
2346         LINVRNT(osd_invariant(obj));
2347
2348         return obj->oo_owner == env;
2349 }
2350
2351 static struct timespec *osd_inode_time(const struct lu_env *env,
2352                                        struct inode *inode, __u64 seconds)
2353 {
2354         struct osd_thread_info  *oti = osd_oti_get(env);
2355         struct timespec         *t   = &oti->oti_time;
2356
2357         t->tv_sec = seconds;
2358         t->tv_nsec = 0;
2359         *t = timespec_trunc(*t, inode->i_sb->s_time_gran);
2360         return t;
2361 }
2362
2363 static void osd_inode_getattr(const struct lu_env *env,
2364                               struct inode *inode, struct lu_attr *attr)
2365 {
2366         attr->la_valid  |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
2367                            LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
2368                            LA_PROJID | LA_FLAGS | LA_NLINK | LA_RDEV |
2369                            LA_BLKSIZE | LA_TYPE;
2370
2371         attr->la_atime   = LTIME_S(inode->i_atime);
2372         attr->la_mtime   = LTIME_S(inode->i_mtime);
2373         attr->la_ctime   = LTIME_S(inode->i_ctime);
2374         attr->la_mode    = inode->i_mode;
2375         attr->la_size    = i_size_read(inode);
2376         attr->la_blocks  = inode->i_blocks;
2377         attr->la_uid     = i_uid_read(inode);
2378         attr->la_gid     = i_gid_read(inode);
2379         attr->la_projid  = i_projid_read(inode);
2380         attr->la_flags   = ll_inode_to_ext_flags(inode->i_flags);
2381         attr->la_nlink   = inode->i_nlink;
2382         attr->la_rdev    = inode->i_rdev;
2383         attr->la_blksize = 1 << inode->i_blkbits;
2384         attr->la_blkbits = inode->i_blkbits;
2385 }
2386
2387 static int osd_attr_get(const struct lu_env *env,
2388                         struct dt_object *dt,
2389                         struct lu_attr *attr)
2390 {
2391         struct osd_object *obj = osd_dt_obj(dt);
2392
2393         if (unlikely(!dt_object_exists(dt)))
2394                 return -ENOENT;
2395         if (unlikely(obj->oo_destroyed))
2396                 return -ENOENT;
2397
2398         LASSERT(!dt_object_remote(dt));
2399         LINVRNT(osd_invariant(obj));
2400
2401         spin_lock(&obj->oo_guard);
2402         osd_inode_getattr(env, obj->oo_inode, attr);
2403         if (obj->oo_lma_flags & LUSTRE_ORPHAN_FL)
2404                 attr->la_flags |= LUSTRE_ORPHAN_FL;
2405         spin_unlock(&obj->oo_guard);
2406
2407         return 0;
2408 }
2409
2410 static int osd_declare_attr_qid(const struct lu_env *env,
2411                                 struct osd_object *obj,
2412                                 struct osd_thandle *oh, long long bspace,
2413                                 qid_t old_id, qid_t new_id, bool enforce,
2414                                 unsigned type)
2415 {
2416         int rc;
2417         struct osd_thread_info *info = osd_oti_get(env);
2418         struct lquota_id_info  *qi = &info->oti_qi;
2419
2420         qi->lqi_type = type;
2421         /* inode accounting */
2422         qi->lqi_is_blk = false;
2423
2424         /* one more inode for the new id ... */
2425         qi->lqi_id.qid_uid = new_id;
2426         qi->lqi_space      = 1;
2427         /* Reserve credits for the new id */
2428         rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
2429         if (rc == -EDQUOT || rc == -EINPROGRESS)
2430                 rc = 0;
2431         if (rc)
2432                 RETURN(rc);
2433
2434         /* and one less inode for the current id */
2435         qi->lqi_id.qid_uid = old_id;
2436         qi->lqi_space      = -1;
2437         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2438         if (rc == -EDQUOT || rc == -EINPROGRESS)
2439                 rc = 0;
2440         if (rc)
2441                 RETURN(rc);
2442
2443         /* block accounting */
2444         qi->lqi_is_blk = true;
2445
2446         /* more blocks for the new uid ... */
2447         qi->lqi_id.qid_uid = new_id;
2448         qi->lqi_space      = bspace;
2449         /*
2450          * Credits for the new uid has been reserved, re-use "obj"
2451          * to save credit reservation.
2452          */
2453         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2454         if (rc == -EDQUOT || rc == -EINPROGRESS)
2455                 rc = 0;
2456         if (rc)
2457                 RETURN(rc);
2458
2459         /* and finally less blocks for the current uid */
2460         qi->lqi_id.qid_uid = old_id;
2461         qi->lqi_space      = -bspace;
2462         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2463         if (rc == -EDQUOT || rc == -EINPROGRESS)
2464                 rc = 0;
2465
2466         RETURN(rc);
2467 }
2468
2469 static int osd_declare_attr_set(const struct lu_env *env,
2470                                 struct dt_object *dt,
2471                                 const struct lu_attr *attr,
2472                                 struct thandle *handle)
2473 {
2474         struct osd_thandle     *oh;
2475         struct osd_object      *obj;
2476         qid_t                   uid;
2477         qid_t                   gid;
2478         long long               bspace;
2479         int                     rc = 0;
2480         bool                    enforce;
2481         ENTRY;
2482
2483         LASSERT(dt != NULL);
2484         LASSERT(handle != NULL);
2485
2486         obj = osd_dt_obj(dt);
2487         LASSERT(osd_invariant(obj));
2488
2489         oh = container_of0(handle, struct osd_thandle, ot_super);
2490         LASSERT(oh->ot_handle == NULL);
2491
2492         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
2493                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2494
2495         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
2496                              osd_dto_credits_noquota[DTO_XATTR_SET]);
2497
2498         if (attr == NULL || obj->oo_inode == NULL)
2499                 RETURN(rc);
2500
2501         bspace   = obj->oo_inode->i_blocks;
2502         bspace <<= obj->oo_inode->i_sb->s_blocksize_bits;
2503         bspace   = toqb(bspace);
2504
2505         /* Changing ownership is always preformed by super user, it should not
2506          * fail with EDQUOT.
2507          *
2508          * We still need to call the osd_declare_qid() to calculate the journal
2509          * credits for updating quota accounting files and to trigger quota
2510          * space adjustment once the operation is completed.*/
2511         if (attr->la_valid & LA_UID || attr->la_valid & LA_GID) {
2512                 /* USERQUOTA */
2513                 uid = i_uid_read(obj->oo_inode);
2514                 enforce = (attr->la_valid & LA_UID) && (attr->la_uid != uid);
2515                 rc = osd_declare_attr_qid(env, obj, oh, bspace, uid,
2516                                 attr->la_uid, enforce, USRQUOTA);
2517                 if (rc)
2518                         RETURN(rc);
2519
2520                 gid = i_gid_read(obj->oo_inode);
2521                 enforce = (attr->la_valid & LA_GID) && (attr->la_gid != gid);
2522                 rc = osd_declare_attr_qid(env, obj, oh, bspace,
2523                                 i_gid_read(obj->oo_inode), attr->la_gid,
2524                                 enforce, GRPQUOTA);
2525                 if (rc)
2526                         RETURN(rc);
2527
2528         }
2529 #ifdef  HAVE_PROJECT_QUOTA
2530         if (attr->la_valid & LA_PROJID) {
2531                 __u32 projid = i_projid_read(obj->oo_inode);
2532                 enforce = (attr->la_valid & LA_PROJID) &&
2533                                         (attr->la_projid != projid);
2534                 rc = osd_declare_attr_qid(env, obj, oh, bspace,
2535                                 (qid_t)projid, (qid_t)attr->la_projid,
2536                                 enforce, PRJQUOTA);
2537                 if (rc)
2538                         RETURN(rc);
2539         }
2540 #endif
2541         RETURN(rc);
2542 }
2543
2544 static int osd_inode_setattr(const struct lu_env *env,
2545                              struct inode *inode, const struct lu_attr *attr)
2546 {
2547         __u64 bits = attr->la_valid;
2548
2549         /* Only allow set size for regular file */
2550         if (!S_ISREG(inode->i_mode))
2551                 bits &= ~(LA_SIZE | LA_BLOCKS);
2552
2553         if (bits == 0)
2554                 return 0;
2555
2556         if (bits & LA_ATIME)
2557                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
2558         if (bits & LA_CTIME)
2559                 inode->i_ctime  = *osd_inode_time(env, inode, attr->la_ctime);
2560         if (bits & LA_MTIME)
2561                 inode->i_mtime  = *osd_inode_time(env, inode, attr->la_mtime);
2562         if (bits & LA_SIZE) {
2563                 spin_lock(&inode->i_lock);
2564                 LDISKFS_I(inode)->i_disksize = attr->la_size;
2565                 i_size_write(inode, attr->la_size);
2566                 spin_unlock(&inode->i_lock);
2567         }
2568
2569         /* OSD should not change "i_blocks" which is used by quota.
2570          * "i_blocks" should be changed by ldiskfs only. */
2571         if (bits & LA_MODE)
2572                 inode->i_mode = (inode->i_mode & S_IFMT) |
2573                                 (attr->la_mode & ~S_IFMT);
2574         if (bits & LA_UID)
2575                 i_uid_write(inode, attr->la_uid);
2576         if (bits & LA_GID)
2577                 i_gid_write(inode, attr->la_gid);
2578         if (bits & LA_PROJID)
2579                 i_projid_write(inode, attr->la_projid);
2580         if (bits & LA_NLINK)
2581                 set_nlink(inode, attr->la_nlink);
2582         if (bits & LA_RDEV)
2583                 inode->i_rdev = attr->la_rdev;
2584
2585         if (bits & LA_FLAGS) {
2586                 /* always keep S_NOCMTIME */
2587                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
2588                                  S_NOCMTIME;
2589         }
2590         return 0;
2591 }
2592
2593 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr)
2594 {
2595         int rc;
2596
2597         if ((attr->la_valid & LA_UID && attr->la_uid != i_uid_read(inode)) ||
2598             (attr->la_valid & LA_GID && attr->la_gid != i_gid_read(inode))) {
2599                 struct iattr    iattr;
2600
2601                 ll_vfs_dq_init(inode);
2602                 iattr.ia_valid = 0;
2603                 if (attr->la_valid & LA_UID)
2604                         iattr.ia_valid |= ATTR_UID;
2605                 if (attr->la_valid & LA_GID)
2606                         iattr.ia_valid |= ATTR_GID;
2607                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
2608                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
2609
2610                 rc = ll_vfs_dq_transfer(inode, &iattr);
2611                 if (rc) {
2612                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
2613                                "enforcement enabled on the ldiskfs "
2614                                "filesystem?\n", inode->i_sb->s_id, rc);
2615                         return rc;
2616                 }
2617         }
2618
2619 #ifdef  HAVE_PROJECT_QUOTA
2620         /* Handle project id Transfer here properly */
2621         if (attr->la_valid & LA_PROJID && attr->la_projid !=
2622                                                 i_projid_read(inode)) {
2623                 rc = __ldiskfs_ioctl_setproject(inode, attr->la_projid);
2624                 if (rc) {
2625                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
2626                                "enforcement enabled on the ldiskfs "
2627                                "filesystem?\n", inode->i_sb->s_id, rc);
2628                         return rc;
2629                 }
2630         }
2631 #endif
2632         return 0;
2633 }
2634
2635 static int osd_attr_set(const struct lu_env *env,
2636                         struct dt_object *dt,
2637                         const struct lu_attr *attr,
2638                         struct thandle *handle)
2639 {
2640         struct osd_object *obj = osd_dt_obj(dt);
2641         struct inode      *inode;
2642         int rc;
2643
2644         if (!dt_object_exists(dt))
2645                 return -ENOENT;
2646
2647         LASSERT(handle != NULL);
2648         LASSERT(!dt_object_remote(dt));
2649         LASSERT(osd_invariant(obj));
2650
2651         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
2652
2653         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING)) {
2654                 struct osd_thread_info  *oti  = osd_oti_get(env);
2655                 const struct lu_fid     *fid0 = lu_object_fid(&dt->do_lu);
2656                 struct lu_fid           *fid1 = &oti->oti_fid;
2657                 struct osd_inode_id     *id   = &oti->oti_id;
2658                 struct iam_path_descr   *ipd;
2659                 struct iam_container    *bag;
2660                 struct osd_thandle      *oh;
2661                 int                      rc;
2662
2663                 fid_cpu_to_be(fid1, fid0);
2664                 memset(id, 1, sizeof(*id));
2665                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
2666                                   fid0)->oi_dir.od_container;
2667                 ipd = osd_idx_ipd_get(env, bag);
2668                 if (unlikely(ipd == NULL))
2669                         RETURN(-ENOMEM);
2670
2671                 oh = container_of0(handle, struct osd_thandle, ot_super);
2672                 rc = iam_update(oh->ot_handle, bag, (const struct iam_key *)fid1,
2673                                 (const struct iam_rec *)id, ipd);
2674                 osd_ipd_put(env, bag, ipd);
2675                 return(rc > 0 ? 0 : rc);
2676         }
2677
2678         inode = obj->oo_inode;
2679
2680         rc = osd_quota_transfer(inode, attr);
2681         if (rc)
2682                 return rc;
2683
2684         spin_lock(&obj->oo_guard);
2685         rc = osd_inode_setattr(env, inode, attr);
2686         spin_unlock(&obj->oo_guard);
2687         if (rc != 0)
2688                 GOTO(out, rc);
2689
2690         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2691
2692         if (!(attr->la_valid & LA_FLAGS))
2693                 GOTO(out, rc);
2694
2695         /* Let's check if there are extra flags need to be set into LMA */
2696         if (attr->la_flags & LUSTRE_LMA_FL_MASKS) {
2697                 struct osd_thread_info *info = osd_oti_get(env);
2698                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
2699
2700                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
2701                                  &info->oti_ost_attrs);
2702                 if (rc)
2703                         GOTO(out, rc);
2704
2705                 lma->lma_incompat |=
2706                         lustre_to_lma_flags(attr->la_flags);
2707                 lustre_lma_swab(lma);
2708                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA,
2709                                      lma, sizeof(*lma), XATTR_REPLACE);
2710                 if (rc != 0) {
2711                         struct osd_device *osd = osd_obj2dev(obj);
2712
2713                         CWARN("%s: set "DFID" lma flags %u failed: rc = %d\n",
2714                               osd_name(osd), PFID(lu_object_fid(&dt->do_lu)),
2715                               lma->lma_incompat, rc);
2716                 } else {
2717                         obj->oo_lma_flags =
2718                                 attr->la_flags & LUSTRE_LMA_FL_MASKS;
2719                 }
2720                 osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
2721         }
2722 out:
2723         osd_trans_exec_check(env, handle, OSD_OT_ATTR_SET);
2724
2725         return rc;
2726 }
2727
2728 static struct dentry *osd_child_dentry_get(const struct lu_env *env,
2729                                            struct osd_object *obj,
2730                                            const char *name, const int namelen)
2731 {
2732         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
2733 }
2734
2735 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
2736                       umode_t mode, struct dt_allocation_hint *hint,
2737                       struct thandle *th)
2738 {
2739         int result;
2740         struct osd_device  *osd = osd_obj2dev(obj);
2741         struct osd_thandle *oth;
2742         struct dt_object   *parent = NULL;
2743         struct inode       *inode;
2744
2745         LINVRNT(osd_invariant(obj));
2746         LASSERT(obj->oo_inode == NULL);
2747         LASSERT(obj->oo_hl_head == NULL);
2748
2749         if (S_ISDIR(mode) && ldiskfs_pdo) {
2750                 obj->oo_hl_head =ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
2751                 if (obj->oo_hl_head == NULL)
2752                         return -ENOMEM;
2753         }
2754
2755         oth = container_of(th, struct osd_thandle, ot_super);
2756         LASSERT(oth->ot_handle->h_transaction != NULL);
2757
2758         if (hint != NULL && hint->dah_parent != NULL &&
2759             !dt_object_remote(hint->dah_parent))
2760                 parent = hint->dah_parent;
2761
2762         inode = ldiskfs_create_inode(oth->ot_handle,
2763                                      parent ? osd_dt_obj(parent)->oo_inode :
2764                                               osd_sb(osd)->s_root->d_inode,
2765                                      mode);
2766         if (!IS_ERR(inode)) {
2767                 /* Do not update file c/mtime in ldiskfs. */
2768                 inode->i_flags |= S_NOCMTIME;
2769
2770                 /* For new created object, it must be consistent,
2771                  * and it is unnecessary to scrub against it. */
2772                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
2773
2774                 obj->oo_inode = inode;
2775                 result = 0;
2776         } else {
2777                 if (obj->oo_hl_head != NULL) {
2778                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
2779                         obj->oo_hl_head = NULL;
2780                 }
2781                 result = PTR_ERR(inode);
2782         }
2783         LINVRNT(osd_invariant(obj));
2784         return result;
2785 }
2786
2787 enum {
2788         OSD_NAME_LEN = 255
2789 };
2790
2791 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
2792                      struct lu_attr *attr,
2793                      struct dt_allocation_hint *hint,
2794                      struct dt_object_format *dof,
2795                      struct thandle *th)
2796 {
2797         int result;
2798         struct osd_thandle *oth;
2799         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX | S_ISGID));
2800
2801         LASSERT(S_ISDIR(attr->la_mode));
2802
2803         oth = container_of(th, struct osd_thandle, ot_super);
2804         LASSERT(oth->ot_handle->h_transaction != NULL);
2805         result = osd_mkfile(info, obj, mode, hint, th);
2806
2807         return result;
2808 }
2809
2810 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
2811                         struct lu_attr *attr,
2812                         struct dt_allocation_hint *hint,
2813                         struct dt_object_format *dof,
2814                         struct thandle *th)
2815 {
2816         int result;
2817         struct osd_thandle *oth;
2818         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
2819
2820         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
2821
2822         LASSERT(S_ISREG(attr->la_mode));
2823
2824         oth = container_of(th, struct osd_thandle, ot_super);
2825         LASSERT(oth->ot_handle->h_transaction != NULL);
2826
2827         result = osd_mkfile(info, obj, mode, hint, th);
2828         if (result == 0) {
2829                 LASSERT(obj->oo_inode != NULL);
2830                 if (feat->dif_flags & DT_IND_VARKEY)
2831                         result = iam_lvar_create(obj->oo_inode,
2832                                                  feat->dif_keysize_max,
2833                                                  feat->dif_ptrsize,
2834                                                  feat->dif_recsize_max,
2835                                                  oth->ot_handle);
2836                 else
2837                         result = iam_lfix_create(obj->oo_inode,
2838                                                  feat->dif_keysize_max,
2839                                                  feat->dif_ptrsize,
2840                                                  feat->dif_recsize_max,
2841                                                  oth->ot_handle);
2842
2843         }
2844         return result;
2845 }
2846
2847 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
2848                      struct lu_attr *attr,
2849                      struct dt_allocation_hint *hint,
2850                      struct dt_object_format *dof,
2851                      struct thandle *th)
2852 {
2853         LASSERT(S_ISREG(attr->la_mode));
2854         return osd_mkfile(info, obj, (attr->la_mode &
2855                                (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2856 }
2857
2858 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
2859                      struct lu_attr *attr,
2860                      struct dt_allocation_hint *hint,
2861                      struct dt_object_format *dof,
2862                      struct thandle *th)
2863 {
2864         LASSERT(S_ISLNK(attr->la_mode));
2865         return osd_mkfile(info, obj, (attr->la_mode &
2866                               (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2867 }
2868
2869 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
2870                      struct lu_attr *attr,
2871                      struct dt_allocation_hint *hint,
2872                      struct dt_object_format *dof,
2873                      struct thandle *th)
2874 {
2875         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
2876         int result;
2877
2878         LINVRNT(osd_invariant(obj));
2879         LASSERT(obj->oo_inode == NULL);
2880         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
2881                 S_ISFIFO(mode) || S_ISSOCK(mode));
2882
2883         result = osd_mkfile(info, obj, mode, hint, th);
2884         if (result == 0) {
2885                 LASSERT(obj->oo_inode != NULL);
2886                 /*
2887                  * This inode should be marked dirty for i_rdev.  Currently
2888                  * that is done in the osd_attr_init().
2889                  */
2890                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
2891                                    attr->la_rdev);
2892         }
2893         LINVRNT(osd_invariant(obj));
2894         return result;
2895 }
2896
2897 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
2898                               struct lu_attr *,
2899                               struct dt_allocation_hint *hint,
2900                               struct dt_object_format *dof,
2901                               struct thandle *);
2902
2903 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
2904 {
2905         osd_obj_type_f result;
2906
2907         switch (type) {
2908         case DFT_DIR:
2909                 result = osd_mkdir;
2910                 break;
2911         case DFT_REGULAR:
2912                 result = osd_mkreg;
2913                 break;
2914         case DFT_SYM:
2915                 result = osd_mksym;
2916                 break;
2917         case DFT_NODE:
2918                 result = osd_mknod;
2919                 break;
2920         case DFT_INDEX:
2921                 result = osd_mk_index;
2922                 break;
2923
2924         default:
2925                 LBUG();
2926                 break;
2927         }
2928         return result;
2929 }
2930
2931
2932 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
2933                         struct dt_object *parent, struct dt_object *child,
2934                         umode_t child_mode)
2935 {
2936         LASSERT(ah);
2937
2938         ah->dah_parent = parent;
2939         ah->dah_mode = child_mode;
2940
2941         if (parent != NULL && !dt_object_remote(parent)) {
2942                 /* will help to find FID->ino at dt_insert("..") */
2943                 struct osd_object *pobj = osd_dt_obj(parent);
2944                 osd_idc_find_and_init(env, osd_obj2dev(pobj), pobj);
2945         }
2946 }
2947
2948 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
2949                           struct lu_attr *attr, struct dt_object_format *dof)
2950 {
2951         struct inode   *inode = obj->oo_inode;
2952         __u64           valid = attr->la_valid;
2953         int             result;
2954
2955         attr->la_valid &= ~(LA_TYPE | LA_MODE);
2956
2957         if (dof->dof_type != DFT_NODE)
2958                 attr->la_valid &= ~LA_RDEV;
2959         if ((valid & LA_ATIME) && (attr->la_atime == LTIME_S(inode->i_atime)))
2960                 attr->la_valid &= ~LA_ATIME;
2961         if ((valid & LA_CTIME) && (attr->la_ctime == LTIME_S(inode->i_ctime)))
2962                 attr->la_valid &= ~LA_CTIME;
2963         if ((valid & LA_MTIME) && (attr->la_mtime == LTIME_S(inode->i_mtime)))
2964                 attr->la_valid &= ~LA_MTIME;
2965
2966         result = osd_quota_transfer(inode, attr);
2967         if (result)
2968                 return;
2969
2970         if (attr->la_valid != 0) {
2971                 result = osd_inode_setattr(info->oti_env, inode, attr);
2972                 /*
2973                  * The osd_inode_setattr() should always succeed here.  The
2974                  * only error that could be returned is EDQUOT when we are
2975                  * trying to change the UID or GID of the inode. However, this
2976                  * should not happen since quota enforcement is no longer
2977                  * enabled on ldiskfs (lquota takes care of it).
2978                  */
2979                 LASSERTF(result == 0, "%d\n", result);
2980                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2981         }
2982
2983         attr->la_valid = valid;
2984 }
2985
2986 /**
2987  * Helper function for osd_object_create()
2988  *
2989  * \retval 0, on success
2990  */
2991 static int __osd_object_create(struct osd_thread_info *info,
2992                                struct osd_object *obj, struct lu_attr *attr,
2993                                struct dt_allocation_hint *hint,
2994                                struct dt_object_format *dof,
2995                                struct thandle *th)
2996 {
2997         int     result;
2998         __u32   umask;
2999
3000         osd_trans_exec_op(info->oti_env, th, OSD_OT_CREATE);
3001
3002         /* we drop umask so that permissions we pass are not affected */
3003         umask = current->fs->umask;
3004         current->fs->umask = 0;
3005
3006         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
3007                                                   th);
3008         if (likely(obj->oo_inode != NULL)) {
3009                 LASSERT(obj->oo_inode->i_state & I_NEW);
3010
3011                 /* Unlock the inode before attr initialization to avoid
3012                  * unnecessary dqget operations. LU-6378 */
3013                 unlock_new_inode(obj->oo_inode);
3014         }
3015
3016         if (likely(result == 0)) {
3017                 osd_attr_init(info, obj, attr, dof);
3018                 osd_object_init0(obj);
3019         }
3020
3021         /* restore previous umask value */
3022         current->fs->umask = umask;
3023
3024         osd_trans_exec_check(info->oti_env, th, OSD_OT_CREATE);
3025
3026         return result;
3027 }
3028
3029 /**
3030  * Helper function for osd_object_create()
3031  *
3032  * \retval 0, on success
3033  */
3034 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
3035                            const struct lu_fid *fid, struct thandle *th)
3036 {
3037         struct osd_thread_info *info = osd_oti_get(env);
3038         struct osd_inode_id    *id   = &info->oti_id;
3039         struct osd_device      *osd  = osd_obj2dev(obj);
3040         struct osd_thandle     *oh;
3041         int                     rc;
3042
3043         LASSERT(obj->oo_inode != NULL);
3044
3045         oh = container_of0(th, struct osd_thandle, ot_super);
3046         LASSERT(oh->ot_handle);
3047         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3048
3049         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
3050         rc = osd_oi_insert(info, osd, fid, id, oh->ot_handle,
3051                            OI_CHECK_FLD, NULL);
3052         osd_trans_exec_check(env, th, OSD_OT_INSERT);
3053
3054         return rc;
3055 }
3056
3057 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
3058                    u64 seq, struct lu_seq_range *range)
3059 {
3060         struct seq_server_site  *ss = osd_seq_site(osd);
3061
3062         if (fid_seq_is_idif(seq)) {
3063                 fld_range_set_ost(range);
3064                 range->lsr_index = idif_ost_idx(seq);
3065                 return 0;
3066         }
3067
3068         if (!fid_seq_in_fldb(seq)) {
3069                 fld_range_set_mdt(range);
3070                 if (ss != NULL)
3071                         /* FIXME: If ss is NULL, it suppose not get lsr_index
3072                          * at all */
3073                         range->lsr_index = ss->ss_node_id;
3074                 return 0;
3075         }
3076
3077         LASSERT(ss != NULL);
3078         fld_range_set_any(range);
3079         /* OSD will only do local fld lookup */
3080         return fld_local_lookup(env, ss->ss_server_fld, seq, range);
3081 }
3082
3083 /*
3084  * Concurrency: no external locking is necessary.
3085  */
3086 static int osd_declare_object_create(const struct lu_env *env,
3087                                      struct dt_object *dt,
3088                                      struct lu_attr *attr,
3089                                      struct dt_allocation_hint *hint,
3090                                      struct dt_object_format *dof,
3091                                      struct thandle *handle)
3092 {
3093         struct osd_thandle      *oh;
3094         int                      rc;
3095         ENTRY;
3096
3097         LASSERT(handle != NULL);
3098
3099         oh = container_of0(handle, struct osd_thandle, ot_super);
3100         LASSERT(oh->ot_handle == NULL);
3101
3102         /* EA object consumes more credits than regular object: osd_mk_index
3103          * vs. osd_mkreg: osd_mk_index will create 2 blocks for root_node and
3104          * leaf_node, could involves the block, block bitmap, groups, GDT
3105          * change for each block, so add 4 * 2 credits in that case. */
3106         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
3107                              osd_dto_credits_noquota[DTO_OBJECT_CREATE] +
3108                              (dof->dof_type == DFT_INDEX) ? 4 * 2 : 0);
3109         /* Reuse idle OI block may cause additional one OI block
3110          * to be changed. */
3111         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3112                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
3113
3114         if (!attr)
3115                 RETURN(0);
3116
3117         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid,
3118                                    attr->la_projid, 1, oh, osd_dt_obj(dt),
3119                                    false, NULL, false);
3120         if (rc != 0)
3121                 RETURN(rc);
3122
3123         /* will help to find FID->ino mapping at dt_insert() */
3124         rc = osd_idc_find_and_init(env, osd_obj2dev(osd_dt_obj(dt)),
3125                                    osd_dt_obj(dt));
3126
3127         RETURN(rc);
3128 }
3129
3130 static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
3131                              struct lu_attr *attr,
3132                              struct dt_allocation_hint *hint,
3133                              struct dt_object_format *dof, struct thandle *th)
3134 {
3135         const struct lu_fid     *fid    = lu_object_fid(&dt->do_lu);
3136         struct osd_object       *obj    = osd_dt_obj(dt);
3137         struct osd_thread_info  *info   = osd_oti_get(env);
3138         int result;
3139         ENTRY;
3140
3141         if (dt_object_exists(dt))
3142                 return -EEXIST;
3143
3144         LINVRNT(osd_invariant(obj));
3145         LASSERT(!dt_object_remote(dt));
3146         LASSERT(osd_write_locked(env, obj));
3147         LASSERT(th != NULL);
3148
3149         if (unlikely(fid_is_acct(fid)))
3150                 /* Quota files can't be created from the kernel any more,
3151                  * 'tune2fs -O quota' will take care of creating them */
3152                 RETURN(-EPERM);
3153
3154         result = __osd_object_create(info, obj, attr, hint, dof, th);
3155         if (result == 0) {
3156                 result = __osd_oi_insert(env, obj, fid, th);
3157                 if (obj->oo_dt.do_body_ops == &osd_body_ops_new)
3158                         obj->oo_dt.do_body_ops = &osd_body_ops;
3159         }
3160         LASSERT(ergo(result == 0,
3161                 dt_object_exists(dt) && !dt_object_remote(dt)));
3162
3163         LASSERT(osd_invariant(obj));
3164         RETURN(result);
3165 }
3166
3167 /**
3168  * Called to destroy on-disk representation of the object
3169  *
3170  * Concurrency: must be locked
3171  */
3172 static int osd_declare_object_destroy(const struct lu_env *env,
3173                                       struct dt_object *dt,
3174                                       struct thandle *th)
3175 {
3176         struct osd_object  *obj = osd_dt_obj(dt);
3177         struct inode       *inode = obj->oo_inode;
3178         struct osd_thandle *oh;
3179         int                 rc;
3180         ENTRY;
3181
3182         if (inode == NULL)
3183                 RETURN(-ENOENT);
3184
3185         oh = container_of0(th, struct osd_thandle, ot_super);
3186         LASSERT(oh->ot_handle == NULL);
3187
3188         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
3189                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
3190         /* Recycle idle OI leaf may cause additional three OI blocks
3191          * to be changed. */
3192         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3193                 osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3194                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
3195         /* one less inode */
3196         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3197                                    i_projid_read(inode), -1, oh, obj, false,
3198                                    NULL, false);
3199         if (rc)
3200                 RETURN(rc);
3201         /* data to be truncated */
3202         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3203                                    i_projid_read(inode), 0, oh, obj, true,
3204                                    NULL, false);
3205         if (rc)
3206                 RETURN(rc);
3207
3208         /* will help to find FID->ino when this object is being
3209          * added to PENDING/ */
3210         rc = osd_idc_find_and_init(env, osd_obj2dev(obj), obj);
3211
3212         RETURN(rc);
3213 }
3214
3215 static int osd_object_destroy(const struct lu_env *env,
3216                               struct dt_object *dt,
3217                               struct thandle *th)
3218 {
3219         const struct lu_fid    *fid = lu_object_fid(&dt->do_lu);
3220         struct osd_object      *obj = osd_dt_obj(dt);
3221         struct inode           *inode = obj->oo_inode;
3222         struct osd_device      *osd = osd_obj2dev(obj);
3223         struct osd_thandle     *oh;
3224         int                     result;
3225         ENTRY;
3226
3227         oh = container_of0(th, struct osd_thandle, ot_super);
3228         LASSERT(oh->ot_handle);
3229         LASSERT(inode);
3230         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
3231
3232         if (unlikely(fid_is_acct(fid)))
3233                 RETURN(-EPERM);
3234
3235         if (S_ISDIR(inode->i_mode)) {
3236                 LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1 ||
3237                         inode->i_nlink == 2);
3238                 /* it will check/delete the inode from remote parent,
3239                  * how to optimize it? unlink performance impaction XXX */
3240                 result = osd_delete_from_remote_parent(env, osd, obj, oh);
3241                 if (result != 0)
3242                         CERROR("%s: delete inode "DFID": rc = %d\n",
3243                                osd_name(osd), PFID(fid), result);
3244
3245                 spin_lock(&obj->oo_guard);
3246                 clear_nlink(inode);
3247                 spin_unlock(&obj->oo_guard);
3248                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
3249         }
3250
3251         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
3252
3253         ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
3254
3255         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3256                 result = osd_oi_delete(osd_oti_get(env), osd, fid,
3257                                        oh->ot_handle, OI_CHECK_FLD);
3258
3259         osd_trans_exec_check(env, th, OSD_OT_DESTROY);
3260         /* XXX: add to ext3 orphan list */
3261         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
3262
3263         /* not needed in the cache anymore */
3264         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
3265         obj->oo_destroyed = 1;
3266
3267         RETURN(0);
3268 }
3269
3270 /**
3271  * Put the fid into lustre_mdt_attrs, and then place the structure
3272  * inode's ea. This fid should not be altered during the life time
3273  * of the inode.
3274  *
3275  * \retval +ve, on success
3276  * \retval -ve, on error
3277  *
3278  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
3279  */
3280 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
3281                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
3282 {
3283         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
3284         struct lustre_mdt_attrs *lma = &loa->loa_lma;
3285         int rc;
3286         ENTRY;
3287
3288         if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
3289                 RETURN(0);
3290
3291         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_OST_EA_FID_SET))
3292                 rc = -ENOMEM;
3293
3294         lustre_loa_init(loa, fid, compat, incompat);
3295         lustre_loa_swab(loa, false);
3296
3297         /* For the OST device with 256 bytes inode size by default,
3298          * the PFID EA will be stored together with LMA EA to avoid
3299          * performance trouble. Otherwise the PFID EA can be stored
3300          * independently. LU-8998 */
3301         if ((compat & LMAC_FID_ON_OST) &&
3302             LDISKFS_INODE_SIZE(inode->i_sb) <= 256)
3303                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
3304                                      sizeof(*loa), XATTR_CREATE);
3305         else
3306                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3307                                      sizeof(*lma), XATTR_CREATE);
3308         /* LMA may already exist, but we need to check that all the
3309          * desired compat/incompat flags have been added. */
3310         if (unlikely(rc == -EEXIST)) {
3311                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
3312                                      XATTR_NAME_LMA, (void *)loa, sizeof(*loa));
3313                 if (rc < 0)
3314                         RETURN(rc);
3315
3316                 if (rc < sizeof(*lma))
3317                         RETURN(-EINVAL);
3318
3319                 lustre_loa_swab(loa, true);
3320                 if (lu_fid_eq(fid, &lma->lma_self_fid) &&
3321                     ((compat == 0 && incompat == 0) ||
3322                      (!(~lma->lma_compat & compat) &&
3323                       !(~lma->lma_incompat & incompat))))
3324                         RETURN(0);
3325
3326                 lma->lma_self_fid = *fid;
3327                 lma->lma_compat |= compat;
3328                 lma->lma_incompat |= incompat;
3329                 if (rc == sizeof(*lma)) {
3330                         lustre_lma_swab(lma);
3331                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3332                                              sizeof(*lma), XATTR_REPLACE);
3333                 } else {
3334                         lustre_loa_swab(loa, false);
3335                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
3336                                              sizeof(*loa), XATTR_REPLACE);
3337                 }
3338         }
3339
3340         RETURN(rc);
3341 }
3342
3343 /**
3344  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
3345  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
3346  * To have compatilibility with 1.8 ldiskfs driver we need to have
3347  * magic number at start of fid data.
3348  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
3349  * its inmemory API.
3350  */
3351 static void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
3352                                          const struct lu_fid *fid)
3353 {
3354         if (!fid_is_namespace_visible(fid) ||
3355             OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
3356                 param->edp_magic = 0;
3357                 return;
3358         }
3359
3360         param->edp_magic = LDISKFS_LUFID_MAGIC;
3361         param->edp_len =  sizeof(struct lu_fid) + 1;
3362         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
3363 }
3364
3365 /**
3366  * Try to read the fid from inode ea into dt_rec.
3367  *
3368  * \param fid object fid.
3369  *
3370  * \retval 0 on success
3371  */
3372 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
3373                           __u32 ino, struct lu_fid *fid,
3374                           struct osd_inode_id *id)
3375 {
3376         struct osd_thread_info *info  = osd_oti_get(env);
3377         struct inode           *inode;
3378         ENTRY;
3379
3380         osd_id_gen(id, ino, OSD_OII_NOGEN);
3381         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
3382         if (IS_ERR(inode))
3383                 RETURN(PTR_ERR(inode));
3384
3385         iput(inode);
3386         RETURN(0);
3387 }
3388
3389 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
3390                                         struct inode *dir,
3391                                         struct inode *parent_dir,
3392                                         const struct lu_fid *dot_fid,
3393                                         const struct lu_fid *dot_dot_fid,
3394                                         struct osd_thandle *oth)
3395 {
3396         struct ldiskfs_dentry_param *dot_ldp;
3397         struct ldiskfs_dentry_param *dot_dot_ldp;
3398         __u32 saved_nlink = dir->i_nlink;
3399         int rc;
3400
3401         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
3402         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
3403
3404         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
3405         dot_ldp->edp_magic = 0;
3406
3407         rc = ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
3408                                     dir, dot_ldp, dot_dot_ldp);
3409         /* The ldiskfs_add_dot_dotdot() may dir->i_nlink as 2, then
3410          * the subseqent ref_add() will increase the dir->i_nlink
3411          * as 3. That is incorrect for new created directory.
3412          *
3413          * It looks like hack, because we want to make the OSD API
3414          * to be order-independent for new created directory object
3415          * between dt_insert(..) and ref_add() operations.
3416          *
3417          * Here, we only restore the in-RAM dir-inode's nlink attr,
3418          * becuase if the nlink attr is not 2, then there will be
3419          * ref_add() called following the dt_insert(..), such call
3420          * will make both the in-RAM and on-disk dir-inode's nlink
3421          * attr to be set as 2. LU-7447 */
3422         set_nlink(dir, saved_nlink);
3423         return rc;
3424 }
3425
3426 /**
3427  * Create an local agent inode for remote entry
3428  */
3429 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
3430                                                   struct osd_device *osd,
3431                                                   struct osd_object *pobj,
3432                                                   const struct lu_fid *fid,
3433                                                   __u32 type,
3434                                                   struct thandle *th)
3435 {
3436         struct osd_thread_info  *info = osd_oti_get(env);
3437         struct inode            *local;
3438         struct osd_thandle      *oh;
3439         int                     rc;
3440         ENTRY;
3441
3442         LASSERT(th);
3443         oh = container_of(th, struct osd_thandle, ot_super);
3444         LASSERT(oh->ot_handle->h_transaction != NULL);
3445
3446         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode, type);
3447         if (IS_ERR(local)) {
3448                 CERROR("%s: create local error %d\n", osd_name(osd),
3449                        (int)PTR_ERR(local));
3450                 RETURN(local);
3451         }
3452
3453         /* restore i_gid in case S_ISGID is set, we will inherit S_ISGID and set
3454          * correct gid on remote file, not agent here */
3455         local->i_gid = current_fsgid();
3456         ldiskfs_set_inode_state(local, LDISKFS_STATE_LUSTRE_NOSCRUB);
3457         unlock_new_inode(local);
3458
3459         /* Set special LMA flag for local agent inode */
3460         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
3461         if (rc != 0) {
3462                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
3463                        osd_name(osd), PFID(fid), rc);
3464                 RETURN(ERR_PTR(rc));
3465         }
3466
3467         if (!S_ISDIR(type))
3468                 RETURN(local);
3469
3470         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
3471                                          lu_object_fid(&pobj->oo_dt.do_lu),
3472                                          fid, oh);
3473         if (rc != 0) {
3474                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
3475                         osd_name(osd), PFID(fid), rc);
3476                 RETURN(ERR_PTR(rc));
3477         }
3478
3479         RETURN(local);
3480 }
3481
3482 /**
3483  * when direntry is deleted, we have to take care of possible agent inode
3484  * referenced by that. unfortunately we can't do this at that point:
3485  * iget() within a running transaction leads to deadlock and we better do
3486  * not call that every delete declaration to save performance. so we put
3487  * a potention agent inode on a list and process that once the transaction
3488  * is over. Notice it's not any worse in terms of real orphans as regular
3489  * object destroy doesn't put inodes on the on-disk orphan list. this should
3490  * be addressed separately
3491  */
3492 static int osd_schedule_agent_inode_removal(const struct lu_env *env,
3493                                             struct osd_thandle *oh,
3494                                             __u32 ino)
3495 {
3496         struct osd_device      *osd = osd_dt_dev(oh->ot_super.th_dev);
3497         struct osd_obj_orphan *oor;
3498
3499         OBD_ALLOC_PTR(oor);
3500         if (oor == NULL)
3501                 return -ENOMEM;
3502
3503         oor->oor_ino = ino;
3504         oor->oor_env = (struct lu_env *)env;
3505         spin_lock(&osd->od_osfs_lock);
3506         list_add(&oor->oor_list, &osd->od_orphan_list);
3507         spin_unlock(&osd->od_osfs_lock);
3508
3509         oh->ot_remove_agents = 1;
3510
3511         return 0;
3512
3513 }
3514
3515 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
3516                                                 struct osd_device *osd)
3517 {
3518         struct osd_thread_info *info = osd_oti_get(env);
3519         struct osd_obj_orphan *oor, *tmp;
3520         struct osd_inode_id id;
3521         struct list_head list;
3522         struct inode *inode;
3523         struct lu_fid fid;
3524         handle_t *jh;
3525         __u32 ino;
3526
3527         INIT_LIST_HEAD(&list);
3528
3529         spin_lock(&osd->od_osfs_lock);
3530         list_for_each_entry_safe(oor, tmp, &osd->od_orphan_list, oor_list) {
3531                 if (oor->oor_env == env) {
3532                         list_del(&oor->oor_list);
3533                         list_add(&oor->oor_list, &list);
3534                 }
3535         }
3536         spin_unlock(&osd->od_osfs_lock);
3537
3538         list_for_each_entry_safe(oor, tmp, &list, oor_list) {
3539
3540                 ino = oor->oor_ino;
3541
3542                 list_del(&oor->oor_list);
3543                 OBD_FREE_PTR(oor);
3544
3545                 osd_id_gen(&id, ino, OSD_OII_NOGEN);
3546                 inode = osd_iget_fid(info, osd, &id, &fid);
3547                 if (IS_ERR(inode))
3548                         continue;
3549
3550                 if (!osd_remote_fid(env, osd, &fid)) {
3551                         iput(inode);
3552                         continue;
3553                 }
3554
3555                 jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC, 1);
3556                 clear_nlink(inode);
3557                 mark_inode_dirty(inode);
3558                 ldiskfs_journal_stop(jh);
3559                 iput(inode);
3560         }
3561
3562         return 0;
3563 }
3564
3565 /**
3566  * OSD layer object create function for interoperability mode (b11826).
3567  * This is mostly similar to osd_object_create(). Only difference being, fid is
3568  * inserted into inode ea here.
3569  *
3570  * \retval   0, on success
3571  * \retval -ve, on error
3572  */
3573 static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
3574                                 struct lu_attr *attr,
3575                                 struct dt_allocation_hint *hint,
3576                                 struct dt_object_format *dof,
3577                                 struct thandle *th)
3578 {
3579         const struct lu_fid     *fid    = lu_object_fid(&dt->do_lu);
3580         struct osd_object       *obj    = osd_dt_obj(dt);
3581         struct osd_thread_info  *info   = osd_oti_get(env);
3582         int                      result, on_ost = 0;
3583
3584         ENTRY;
3585
3586         if (dt_object_exists(dt))
3587                 RETURN(-EEXIST);
3588
3589         LASSERT(osd_invariant(obj));
3590         LASSERT(!dt_object_remote(dt));
3591         LASSERT(osd_write_locked(env, obj));
3592         LASSERT(th != NULL);
3593
3594         if (unlikely(fid_is_acct(fid)))
3595                 /* Quota files can't be created from the kernel any more,
3596                  * 'tune2fs -O quota' will take care of creating them */
3597                 RETURN(-EPERM);
3598
3599         result = __osd_object_create(info, obj, attr, hint, dof, th);
3600         if (result == 0) {
3601                 if (fid_is_idif(fid) &&
3602                     !osd_dev(dt->do_lu.lo_dev)->od_index_in_idif) {
3603                         struct lu_fid *tfid = &info->oti_fid;
3604                         struct ost_id *oi   = &info->oti_ostid;
3605
3606                         fid_to_ostid(fid, oi);
3607                         ostid_to_fid(tfid, oi, 0);
3608                         on_ost = 1;
3609                         result = osd_ea_fid_set(info, obj->oo_inode, tfid,
3610                                                 LMAC_FID_ON_OST, 0);
3611                 } else {
3612                         on_ost = fid_is_on_ost(info, osd_obj2dev(obj),
3613                                                fid, OI_CHECK_FLD);
3614                         result = osd_ea_fid_set(info, obj->oo_inode, fid,
3615                                                 on_ost ? LMAC_FID_ON_OST : 0,
3616                                                 0);
3617                 }
3618                 if (obj->oo_dt.do_body_ops == &osd_body_ops_new)
3619                         obj->oo_dt.do_body_ops = &osd_body_ops;
3620         }
3621
3622         if (result == 0)
3623                 result = __osd_oi_insert(env, obj, fid, th);
3624
3625         /* a small optimization - dt_insert() isn't usually applied
3626          * to OST objects, so we don't need to cache OI mapping for
3627          * OST objects */
3628         if (result == 0 && on_ost == 0) {
3629                 struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
3630                 result = osd_idc_find_and_init(env, osd, obj);
3631                 LASSERT(result == 0);
3632         }
3633
3634         LASSERT(ergo(result == 0,
3635                      dt_object_exists(dt) && !dt_object_remote(dt)));
3636         LINVRNT(osd_invariant(obj));