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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.sun.com/software/products/lustre/docs/GPLv2.pdf
19  *
20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21  * CA 95054 USA or visit www.sun.com if you need additional information or
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2013, Intel Corporation.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  *
36  * lustre/osd/osd_handler.c
37  *
38  * Top-level entry points into osd module
39  *
40  * Author: Nikita Danilov <nikita@clusterfs.com>
41  *         Pravin Shelar <pravin.shelar@sun.com> : Added fid in dirent
42  */
43
44 #define DEBUG_SUBSYSTEM S_OSD
45
46 #include <linux/module.h>
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 /*
58  * struct OBD_{ALLOC,FREE}*()
59  * OBD_FAIL_CHECK
60  */
61 #include <obd_support.h>
62 /* struct ptlrpc_thread */
63 #include <lustre_net.h>
64 #include <lustre_fid.h>
65 /* process_config */
66 #include <lustre_param.h>
67
68 #include "osd_internal.h"
69 #include "osd_dynlocks.h"
70
71 /* llo_* api support */
72 #include <md_object.h>
73 #include <lustre_quota.h>
74
75 #include <ldiskfs/xattr.h>
76 #include <lustre_linkea.h>
77
78 int ldiskfs_pdo = 1;
79 CFS_MODULE_PARM(ldiskfs_pdo, "i", int, 0644,
80                 "ldiskfs with parallel directory operations");
81
82 int ldiskfs_track_declares_assert;
83 CFS_MODULE_PARM(ldiskfs_track_declares_assert, "i", int, 0644,
84                 "LBUG during tracking of declares");
85
86 /* Slab to allocate dynlocks */
87 struct kmem_cache *dynlock_cachep;
88
89 static struct lu_kmem_descr ldiskfs_caches[] = {
90         {
91                 .ckd_cache = &dynlock_cachep,
92                 .ckd_name  = "dynlock_cache",
93                 .ckd_size  = sizeof(struct dynlock_handle)
94         },
95         {
96                 .ckd_cache = NULL
97         }
98 };
99
100 static const char dot[] = ".";
101 static const char dotdot[] = "..";
102 static const char remote_obj_dir[] = "REM_OBJ_DIR";
103
104 static const struct lu_object_operations      osd_lu_obj_ops;
105 static const struct dt_object_operations      osd_obj_ops;
106 static const struct dt_object_operations      osd_obj_ea_ops;
107 static const struct dt_object_operations      osd_obj_otable_it_ops;
108 static const struct dt_index_operations       osd_index_iam_ops;
109 static const struct dt_index_operations       osd_index_ea_ops;
110
111 int osd_trans_declare_op2rb[] = {
112         [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
113         [OSD_OT_PUNCH]          = OSD_OT_MAX,
114         [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
115         [OSD_OT_CREATE]         = OSD_OT_DESTROY,
116         [OSD_OT_DESTROY]        = OSD_OT_CREATE,
117         [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
118         [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
119         [OSD_OT_WRITE]          = OSD_OT_WRITE,
120         [OSD_OT_INSERT]         = OSD_OT_DELETE,
121         [OSD_OT_DELETE]         = OSD_OT_INSERT,
122         [OSD_OT_UPDATE]         = OSD_OT_MAX,
123         [OSD_OT_QUOTA]          = OSD_OT_MAX,
124 };
125
126 static int osd_has_index(const struct osd_object *obj)
127 {
128         return obj->oo_dt.do_index_ops != NULL;
129 }
130
131 static int osd_object_invariant(const struct lu_object *l)
132 {
133         return osd_invariant(osd_obj(l));
134 }
135
136 /*
137  * Concurrency: doesn't matter
138  */
139
140 /*
141  * Concurrency: doesn't matter
142  */
143 static int osd_write_locked(const struct lu_env *env, struct osd_object *o)
144 {
145         struct osd_thread_info *oti = osd_oti_get(env);
146         return oti->oti_w_locks > 0 && o->oo_owner == env;
147 }
148
149 /*
150  * Concurrency: doesn't access mutable data
151  */
152 static int osd_root_get(const struct lu_env *env,
153                         struct dt_device *dev, struct lu_fid *f)
154 {
155         lu_local_obj_fid(f, OSD_FS_ROOT_OID);
156         return 0;
157 }
158
159 /*
160  * OSD object methods.
161  */
162
163 /*
164  * Concurrency: no concurrent access is possible that early in object
165  * life-cycle.
166  */
167 static struct lu_object *osd_object_alloc(const struct lu_env *env,
168                                           const struct lu_object_header *hdr,
169                                           struct lu_device *d)
170 {
171         struct osd_object *mo;
172
173         OBD_ALLOC_PTR(mo);
174         if (mo != NULL) {
175                 struct lu_object *l;
176
177                 l = &mo->oo_dt.do_lu;
178                 dt_object_init(&mo->oo_dt, NULL, d);
179                 mo->oo_dt.do_ops = &osd_obj_ea_ops;
180                 l->lo_ops = &osd_lu_obj_ops;
181                 init_rwsem(&mo->oo_sem);
182                 init_rwsem(&mo->oo_ext_idx_sem);
183                 spin_lock_init(&mo->oo_guard);
184                 return l;
185         } else {
186                 return NULL;
187         }
188 }
189
190 int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
191                 struct dentry *dentry, struct lustre_mdt_attrs *lma)
192 {
193         int rc;
194
195         CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
196         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
197                              info->oti_mdt_attrs_old, LMA_OLD_SIZE);
198         if (rc > 0) {
199                 if ((void *)lma != (void *)info->oti_mdt_attrs_old)
200                         memcpy(lma, info->oti_mdt_attrs_old, sizeof(*lma));
201                 rc = 0;
202                 lustre_lma_swab(lma);
203                 /* Check LMA compatibility */
204                 if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
205                         CWARN("%.16s: unsupported incompat LMA feature(s) %#x "
206                               "for fid = "DFID", ino = %lu\n",
207                               LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
208                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
209                               PFID(&lma->lma_self_fid), inode->i_ino);
210                         rc = -EOPNOTSUPP;
211                 }
212         } else if (rc == 0) {
213                 rc = -ENODATA;
214         }
215
216         return rc;
217 }
218
219 /*
220  * retrieve object from backend ext fs.
221  **/
222 struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
223                        struct osd_inode_id *id)
224 {
225         struct inode *inode = NULL;
226
227         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
228         if (IS_ERR(inode)) {
229                 CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
230                        id->oii_ino, PTR_ERR(inode));
231         } else if (id->oii_gen != OSD_OII_NOGEN &&
232                    inode->i_generation != id->oii_gen) {
233                 CDEBUG(D_INODE, "unmatched inode: ino = %u, oii_gen = %u, "
234                        "i_generation = %u\n",
235                        id->oii_ino, id->oii_gen, inode->i_generation);
236                 iput(inode);
237                 inode = ERR_PTR(-ESTALE);
238         } else if (inode->i_nlink == 0) {
239                 /* due to parallel readdir and unlink,
240                 * we can have dead inode here. */
241                 CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
242                 iput(inode);
243                 inode = ERR_PTR(-ESTALE);
244         } else if (is_bad_inode(inode)) {
245                 CWARN("%.16s: bad inode: ino = %u\n",
246                 LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name, id->oii_ino);
247                 iput(inode);
248                 inode = ERR_PTR(-ENOENT);
249         } else {
250                 if (id->oii_gen == OSD_OII_NOGEN)
251                         osd_id_gen(id, inode->i_ino, inode->i_generation);
252
253                 /* Do not update file c/mtime in ldiskfs.
254                  * NB: we don't have any lock to protect this because we don't
255                  * have reference on osd_object now, but contention with
256                  * another lookup + attr_set can't happen in the tiny window
257                  * between if (...) and set S_NOCMTIME. */
258                 if (!(inode->i_flags & S_NOCMTIME))
259                         inode->i_flags |= S_NOCMTIME;
260         }
261         return inode;
262 }
263
264 static struct inode *
265 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
266              struct osd_inode_id *id, struct lu_fid *fid)
267 {
268         struct lustre_mdt_attrs *lma   = &info->oti_mdt_attrs;
269         struct inode            *inode;
270         int                      rc;
271
272         inode = osd_iget(info, dev, id);
273         if (IS_ERR(inode))
274                 return inode;
275
276         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
277         if (rc == 0) {
278                 *fid = lma->lma_self_fid;
279         } else if (rc == -ENODATA) {
280                 if (unlikely(inode == osd_sb(dev)->s_root->d_inode))
281                         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
282                 else
283                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
284         } else {
285                 iput(inode);
286                 inode = ERR_PTR(rc);
287         }
288         return inode;
289 }
290
291 static struct inode *osd_iget_check(struct osd_thread_info *info,
292                                     struct osd_device *dev,
293                                     const struct lu_fid *fid,
294                                     struct osd_inode_id *id,
295                                     bool in_oi)
296 {
297         struct inode    *inode;
298         int              rc     = 0;
299         ENTRY;
300
301         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
302         if (IS_ERR(inode)) {
303                 rc = PTR_ERR(inode);
304                 if (!in_oi || (rc != -ENOENT && rc != -ESTALE)) {
305                         CDEBUG(D_INODE, "no inode: ino = %u, rc = %d\n",
306                                id->oii_ino, rc);
307
308                         GOTO(put, rc);
309                 }
310
311                 goto check_oi;
312         }
313
314         if (is_bad_inode(inode)) {
315                 rc = -ENOENT;
316                 if (!in_oi) {
317                         CDEBUG(D_INODE, "bad inode: ino = %u\n", id->oii_ino);
318
319                         GOTO(put, rc);
320                 }
321
322                 goto check_oi;
323         }
324
325         if (id->oii_gen != OSD_OII_NOGEN &&
326             inode->i_generation != id->oii_gen) {
327                 rc = -ESTALE;
328                 if (!in_oi) {
329                         CDEBUG(D_INODE, "unmatched inode: ino = %u, "
330                                "oii_gen = %u, i_generation = %u\n",
331                                id->oii_ino, id->oii_gen, inode->i_generation);
332
333                         GOTO(put, rc);
334                 }
335
336                 goto check_oi;
337         }
338
339         if (inode->i_nlink == 0) {
340                 rc = -ENOENT;
341                 if (!in_oi) {
342                         CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
343
344                         GOTO(put, rc);
345                 }
346
347                 goto check_oi;
348         }
349
350 check_oi:
351         if (rc != 0) {
352                 LASSERTF(rc == -ESTALE || rc == -ENOENT, "rc = %d\n", rc);
353
354                 rc = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
355                 /* XXX: There are some possible cases:
356                  *      1. rc = 0.
357                  *         Backup/restore caused the OI invalid.
358                  *      2. rc = 0.
359                  *         Someone unlinked the object but NOT removed
360                  *         the OI mapping, such as mount target device
361                  *         as ldiskfs, and modify something directly.
362                  *      3. rc = -ENOENT.
363                  *         Someone just removed the object between the
364                  *         former oi_lookup and the iget. It is normal.
365                  *      4. Other failure cases.
366                  *
367                  *      Generally, when the device is mounted, it will
368                  *      auto check whether the system is restored from
369                  *      file-level backup or not. We trust such detect
370                  *      to distinguish the 1st case from the 2nd case. */
371                 if (rc == 0) {
372                         if (!IS_ERR(inode) && inode->i_generation != 0 &&
373                             inode->i_generation == id->oii_gen)
374                                 rc = -ENOENT;
375                         else
376                                 rc = -EREMCHG;
377                 }
378         } else {
379                 if (id->oii_gen == OSD_OII_NOGEN)
380                         osd_id_gen(id, inode->i_ino, inode->i_generation);
381
382                 /* Do not update file c/mtime in ldiskfs.
383                  * NB: we don't have any lock to protect this because we don't
384                  * have reference on osd_object now, but contention with
385                  * another lookup + attr_set can't happen in the tiny window
386                  * between if (...) and set S_NOCMTIME. */
387                 if (!(inode->i_flags & S_NOCMTIME))
388                         inode->i_flags |= S_NOCMTIME;
389         }
390
391         GOTO(put, rc);
392
393 put:
394         if (rc != 0) {
395                 if (!IS_ERR(inode))
396                         iput(inode);
397
398                 inode = ERR_PTR(rc);
399         }
400
401         return inode;
402 }
403
404 /**
405  * \retval +v: new filter_fid, does not contain self-fid
406  * \retval 0:  filter_fid_old, contains self-fid
407  * \retval -v: other failure cases
408  */
409 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
410                  struct dentry *dentry, struct lu_fid *fid)
411 {
412         struct filter_fid_old   *ff     = &info->oti_ff;
413         struct ost_id           *ostid  = &info->oti_ostid;
414         int                      rc;
415
416         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
417         if (rc == sizeof(*ff)) {
418                 rc = 0;
419                 ostid_set_seq(ostid, le64_to_cpu(ff->ff_seq));
420                 ostid_set_id(ostid, le64_to_cpu(ff->ff_objid));
421                 /* XXX: should use real OST index in the future. LU-3569 */
422                 ostid_to_fid(fid, ostid, 0);
423         } else if (rc == sizeof(struct filter_fid)) {
424                 rc = 1;
425         } else if (rc >= 0) {
426                 rc = -EINVAL;
427         }
428
429         return rc;
430 }
431
432 static int osd_lma_self_repair(struct osd_thread_info *info,
433                                struct osd_device *osd, struct inode *inode,
434                                const struct lu_fid *fid, __u32 compat)
435 {
436         handle_t *jh;
437         int       rc;
438
439         LASSERT(current->journal_info == NULL);
440
441         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
442                                   osd_dto_credits_noquota[DTO_XATTR_SET]);
443         if (IS_ERR(jh)) {
444                 rc = PTR_ERR(jh);
445                 CWARN("%s: cannot start journal for lma_self_repair: rc = %d\n",
446                       osd_name(osd), rc);
447                 return rc;
448         }
449
450         rc = osd_ea_fid_set(info, inode, fid, compat, 0);
451         if (rc != 0)
452                 CWARN("%s: cannot self repair the LMA: rc = %d\n",
453                       osd_name(osd), rc);
454         ldiskfs_journal_stop(jh);
455         return rc;
456 }
457
458 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
459 {
460         struct osd_thread_info  *info   = osd_oti_get(env);
461         struct osd_device       *osd    = osd_obj2dev(obj);
462         struct lustre_mdt_attrs *lma    = &info->oti_mdt_attrs;
463         struct inode            *inode  = obj->oo_inode;
464         struct dentry           *dentry = &info->oti_obj_dentry;
465         struct lu_fid           *fid    = NULL;
466         const struct lu_fid     *rfid   = lu_object_fid(&obj->oo_dt.do_lu);
467         int                      rc;
468         ENTRY;
469
470         CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
471         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
472                              info->oti_mdt_attrs_old, LMA_OLD_SIZE);
473         if (rc == -ENODATA && !fid_is_igif(rfid) && osd->od_check_ff) {
474                 fid = &lma->lma_self_fid;
475                 rc = osd_get_idif(info, inode, dentry, fid);
476                 if ((rc > 0) || (rc == -ENODATA && osd->od_lma_self_repair)) {
477                         /* For the given OST-object, if it has neither LMA nor
478                          * FID in XATTR_NAME_FID, then the given FID (which is
479                          * contained in the @obj, from client RPC for locating
480                          * the OST-object) is trusted. We use it to generate
481                          * the LMA. */
482                         osd_lma_self_repair(info, osd, inode, rfid,
483                                 fid_is_on_ost(info, osd, fid, OI_CHECK_FLD) ?
484                                 LMAC_FID_ON_OST : 0);
485                         RETURN(0);
486                 }
487         }
488
489         if (unlikely(rc == -ENODATA))
490                 RETURN(0);
491
492         if (rc < 0)
493                 RETURN(rc);
494
495         if (rc > 0) {
496                 rc = 0;
497                 lustre_lma_swab(lma);
498                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
499                              CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT))) {
500                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
501                               "fid = "DFID", ino = %lu\n", osd_name(osd),
502                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
503                               PFID(rfid), inode->i_ino);
504                         rc = -EOPNOTSUPP;
505                 } else if (!(lma->lma_compat & LMAC_NOT_IN_OI)) {
506                         fid = &lma->lma_self_fid;
507                 }
508         }
509
510         if (fid != NULL && unlikely(!lu_fid_eq(rfid, fid))) {
511                 if (fid_is_idif(rfid) && fid_is_idif(fid)) {
512                         struct ost_id   *oi   = &info->oti_ostid;
513                         struct lu_fid   *fid1 = &info->oti_fid3;
514                         __u32            idx  = fid_idif_ost_idx(rfid);
515
516                         /* For old IDIF, the OST index is not part of the IDIF,
517                          * Means that different OSTs may have the same IDIFs.
518                          * Under such case, we need to make some compatible
519                          * check to make sure to trigger OI scrub properly. */
520                         if (idx != 0 && fid_idif_ost_idx(fid) == 0) {
521                                 /* Given @rfid is new, LMA is old. */
522                                 fid_to_ostid(fid, oi);
523                                 ostid_to_fid(fid1, oi, idx);
524                                 if (lu_fid_eq(fid1, rfid)) {
525                                         if (osd->od_lma_self_repair)
526                                                 osd_lma_self_repair(info, osd,
527                                                         inode, rfid,
528                                                         LMAC_FID_ON_OST);
529                                         RETURN(0);
530                                 }
531                         }
532                 }
533
534                 CDEBUG(D_INODE, "%s: FID "DFID" != self_fid "DFID"\n",
535                        osd_name(osd), PFID(rfid), PFID(fid));
536                 rc = -EREMCHG;
537         }
538
539         RETURN(rc);
540 }
541
542 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
543                           const struct lu_fid *fid,
544                           const struct lu_object_conf *conf)
545 {
546         struct osd_thread_info *info;
547         struct lu_device       *ldev   = obj->oo_dt.do_lu.lo_dev;
548         struct osd_device      *dev;
549         struct osd_idmap_cache *oic;
550         struct osd_inode_id    *id;
551         struct inode           *inode;
552         struct osd_scrub       *scrub;
553         struct scrub_file      *sf;
554         int                     result;
555         int                     saved  = 0;
556         bool                    in_oi  = false;
557         bool                    triggered = false;
558         ENTRY;
559
560         LINVRNT(osd_invariant(obj));
561         LASSERT(obj->oo_inode == NULL);
562         LASSERTF(fid_is_sane(fid) || fid_is_idif(fid), DFID"\n", PFID(fid));
563
564         dev = osd_dev(ldev);
565         scrub = &dev->od_scrub;
566         sf = &scrub->os_file;
567         info = osd_oti_get(env);
568         LASSERT(info);
569         oic = &info->oti_cache;
570
571         if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
572                 RETURN(-ENOENT);
573
574         /* For the object is created as locking anchor, or for the object to
575          * be created on disk. No need to osd_oi_lookup() at here because FID
576          * shouldn't never be re-used, if it's really a duplicate FID from
577          * unexpected reason, we should be able to detect it later by calling
578          * do_create->osd_oi_insert(). */
579         if (conf != NULL && conf->loc_flags & LOC_F_NEW)
580                 GOTO(out, result = 0);
581
582         /* Search order: 1. per-thread cache. */
583         if (lu_fid_eq(fid, &oic->oic_fid) &&
584             likely(oic->oic_dev == dev)) {
585                 id = &oic->oic_lid;
586                 goto iget;
587         }
588
589         id = &info->oti_id;
590         if (!list_empty(&scrub->os_inconsistent_items)) {
591                 /* Search order: 2. OI scrub pending list. */
592                 result = osd_oii_lookup(dev, fid, id);
593                 if (result == 0)
594                         goto iget;
595         }
596
597         /* Search order: 3. OI files. */
598         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
599         if (result == -ENOENT) {
600                 if (!fid_is_norm(fid) ||
601                     fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
602                     !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
603                                       sf->sf_oi_bitmap))
604                         GOTO(out, result = 0);
605
606                 goto trigger;
607         }
608
609         if (result != 0)
610                 GOTO(out, result);
611
612         in_oi = true;
613
614 iget:
615         inode = osd_iget_check(info, dev, fid, id, in_oi);
616         if (IS_ERR(inode)) {
617                 result = PTR_ERR(inode);
618                 if (result == -ENOENT || result == -ESTALE) {
619                         if (!in_oi)
620                                 fid_zero(&oic->oic_fid);
621
622                         GOTO(out, result = -ENOENT);
623                 } else if (result == -EREMCHG) {
624
625 trigger:
626                         if (!in_oi)
627                                 fid_zero(&oic->oic_fid);
628
629                         if (unlikely(triggered))
630                                 GOTO(out, result = saved);
631
632                         triggered = true;
633                         if (thread_is_running(&scrub->os_thread)) {
634                                 result = -EINPROGRESS;
635                         } else if (!dev->od_noscrub) {
636                                 result = osd_scrub_start(dev);
637                                 LCONSOLE_WARN("%.16s: trigger OI scrub by RPC "
638                                               "for "DFID", rc = %d [1]\n",
639                                               osd_name(dev), PFID(fid),result);
640                                 if (result == 0 || result == -EALREADY)
641                                         result = -EINPROGRESS;
642                                 else
643                                         result = -EREMCHG;
644                         }
645
646                         /* We still have chance to get the valid inode: for the
647                          * object which is referenced by remote name entry, the
648                          * object on the local MDT will be linked under the dir
649                          * of "/REMOTE_PARENT_DIR" with its FID string as name.
650                          *
651                          * We do not know whether the object for the given FID
652                          * is referenced by some remote name entry or not, and
653                          * especially for DNE II, a multiple-linked object may
654                          * have many name entries reside on many MDTs.
655                          *
656                          * To simplify the operation, OSD will not distinguish
657                          * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
658                          * only happened for the RPC from other MDT during the
659                          * OI scrub, or for the client side RPC with FID only,
660                          * such as FID to path, or from old connected client. */
661                         saved = result;
662                         result = osd_lookup_in_remote_parent(info, dev,
663                                                              fid, id);
664                         if (result == 0) {
665                                 in_oi = false;
666                                 goto iget;
667                         }
668
669                         result = saved;
670                 }
671
672                 GOTO(out, result);
673         }
674
675         obj->oo_inode = inode;
676         LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
677
678         result = osd_check_lma(env, obj);
679         if (result != 0) {
680                 iput(inode);
681                 obj->oo_inode = NULL;
682                 if (result == -EREMCHG) {
683                         if (!in_oi) {
684                                 result = osd_oi_lookup(info, dev, fid, id,
685                                                        OI_CHECK_FLD);
686                                 if (result != 0) {
687                                         fid_zero(&oic->oic_fid);
688                                         GOTO(out, result);
689                                 }
690                         }
691
692                         goto trigger;
693                 }
694
695                 GOTO(out, result);
696         }
697
698         obj->oo_compat_dot_created = 1;
699         obj->oo_compat_dotdot_created = 1;
700
701         if (!S_ISDIR(inode->i_mode) || !ldiskfs_pdo) /* done */
702                 GOTO(out, result = 0);
703
704         LASSERT(obj->oo_hl_head == NULL);
705         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
706         if (obj->oo_hl_head == NULL) {
707                 obj->oo_inode = NULL;
708                 iput(inode);
709                 GOTO(out, result = -ENOMEM);
710         }
711         GOTO(out, result = 0);
712
713 out:
714         LINVRNT(osd_invariant(obj));
715         return result;
716 }
717
718 /*
719  * Concurrency: shouldn't matter.
720  */
721 static void osd_object_init0(struct osd_object *obj)
722 {
723         LASSERT(obj->oo_inode != NULL);
724         obj->oo_dt.do_body_ops = &osd_body_ops;
725         obj->oo_dt.do_lu.lo_header->loh_attr |=
726                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
727 }
728
729 /*
730  * Concurrency: no concurrent access is possible that early in object
731  * life-cycle.
732  */
733 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
734                            const struct lu_object_conf *conf)
735 {
736         struct osd_object *obj = osd_obj(l);
737         int result;
738
739         LINVRNT(osd_invariant(obj));
740
741         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
742                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
743                 l->lo_header->loh_attr |= LOHA_EXISTS;
744                 return 0;
745         }
746
747         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
748         obj->oo_dt.do_body_ops = &osd_body_ops_new;
749         if (result == 0 && obj->oo_inode != NULL)
750                 osd_object_init0(obj);
751
752         LINVRNT(osd_invariant(obj));
753         return result;
754 }
755
756 /*
757  * Concurrency: no concurrent access is possible that late in object
758  * life-cycle.
759  */
760 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
761 {
762         struct osd_object *obj = osd_obj(l);
763
764         LINVRNT(osd_invariant(obj));
765
766         dt_object_fini(&obj->oo_dt);
767         if (obj->oo_hl_head != NULL)
768                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
769         OBD_FREE_PTR(obj);
770 }
771
772 /*
773  * Concurrency: no concurrent access is possible that late in object
774  * life-cycle.
775  */
776 static void osd_index_fini(struct osd_object *o)
777 {
778         struct iam_container *bag;
779
780         if (o->oo_dir != NULL) {
781                 bag = &o->oo_dir->od_container;
782                 if (o->oo_inode != NULL) {
783                         if (bag->ic_object == o->oo_inode)
784                                 iam_container_fini(bag);
785                 }
786                 OBD_FREE_PTR(o->oo_dir);
787                 o->oo_dir = NULL;
788         }
789 }
790
791 /*
792  * Concurrency: no concurrent access is possible that late in object
793  * life-cycle (for all existing callers, that is. New callers have to provide
794  * their own locking.)
795  */
796 static int osd_inode_unlinked(const struct inode *inode)
797 {
798         return inode->i_nlink == 0;
799 }
800
801 enum {
802         OSD_TXN_OI_DELETE_CREDITS    = 20,
803         OSD_TXN_INODE_DELETE_CREDITS = 20
804 };
805
806 /*
807  * Journal
808  */
809
810 #if OSD_THANDLE_STATS
811 /**
812  * Set time when the handle is allocated
813  */
814 static void osd_th_alloced(struct osd_thandle *oth)
815 {
816         oth->oth_alloced = cfs_time_current();
817 }
818
819 /**
820  * Set time when the handle started
821  */
822 static void osd_th_started(struct osd_thandle *oth)
823 {
824         oth->oth_started = cfs_time_current();
825 }
826
827 /**
828  * Helper function to convert time interval to microseconds packed in
829  * long int.
830  */
831 static long interval_to_usec(cfs_time_t start, cfs_time_t end)
832 {
833         struct timeval val;
834
835         cfs_duration_usec(cfs_time_sub(end, start), &val);
836         return val.tv_sec * 1000000 + val.tv_usec;
837 }
838
839 /**
840  * Check whether the we deal with this handle for too long.
841  */
842 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
843                                 cfs_time_t alloced, cfs_time_t started,
844                                 cfs_time_t closed)
845 {
846         cfs_time_t now = cfs_time_current();
847
848         LASSERT(dev != NULL);
849
850         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
851                             interval_to_usec(alloced, started));
852         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
853                             interval_to_usec(started, closed));
854         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
855                             interval_to_usec(closed, now));
856
857         if (cfs_time_before(cfs_time_add(alloced, cfs_time_seconds(30)), now)) {
858                 CWARN("transaction handle %p was open for too long: "
859                       "now "CFS_TIME_T" ,"
860                       "alloced "CFS_TIME_T" ,"
861                       "started "CFS_TIME_T" ,"
862                       "closed "CFS_TIME_T"\n",
863                       oth, now, alloced, started, closed);
864                 libcfs_debug_dumpstack(NULL);
865         }
866 }
867
868 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
869 {                                                                       \
870         cfs_time_t __closed = cfs_time_current();                       \
871         cfs_time_t __alloced = oth->oth_alloced;                        \
872         cfs_time_t __started = oth->oth_started;                        \
873                                                                         \
874         expr;                                                           \
875         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
876 }
877
878 #else /* OSD_THANDLE_STATS */
879
880 #define osd_th_alloced(h)                  do {} while(0)
881 #define osd_th_started(h)                  do {} while(0)
882 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
883
884 #endif /* OSD_THANDLE_STATS */
885
886 /*
887  * Concurrency: doesn't access mutable data.
888  */
889 static int osd_param_is_not_sane(const struct osd_device *dev,
890                                  const struct thandle *th)
891 {
892         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
893
894         return oh->ot_credits > osd_transaction_size(dev);
895 }
896
897 /*
898  * Concurrency: shouldn't matter.
899  */
900 static void osd_trans_commit_cb(struct super_block *sb,
901                                 struct ldiskfs_journal_cb_entry *jcb, int error)
902 {
903         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
904         struct thandle     *th  = &oh->ot_super;
905         struct lu_device   *lud = &th->th_dev->dd_lu_dev;
906         struct dt_txn_commit_cb *dcb, *tmp;
907
908         LASSERT(oh->ot_handle == NULL);
909
910         if (error)
911                 CERROR("transaction @0x%p commit error: %d\n", th, error);
912
913         dt_txn_hook_commit(th);
914
915         /* call per-transaction callbacks if any */
916         list_for_each_entry_safe(dcb, tmp, &oh->ot_dcb_list, dcb_linkage) {
917                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
918                          "commit callback entry: magic=%x name='%s'\n",
919                          dcb->dcb_magic, dcb->dcb_name);
920                 list_del_init(&dcb->dcb_linkage);
921                 dcb->dcb_func(NULL, th, dcb, error);
922         }
923
924         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
925         lu_device_put(lud);
926         th->th_dev = NULL;
927
928         lu_context_exit(&th->th_ctx);
929         lu_context_fini(&th->th_ctx);
930         thandle_put(th);
931 }
932
933 static struct thandle *osd_trans_create(const struct lu_env *env,
934                                         struct dt_device *d)
935 {
936         struct osd_thread_info  *oti = osd_oti_get(env);
937         struct osd_iobuf        *iobuf = &oti->oti_iobuf;
938         struct osd_thandle      *oh;
939         struct thandle          *th;
940         ENTRY;
941
942         /* on pending IO in this thread should left from prev. request */
943         LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
944
945         th = ERR_PTR(-ENOMEM);
946         OBD_ALLOC_GFP(oh, sizeof *oh, GFP_NOFS);
947         if (oh != NULL) {
948                 oh->ot_quota_trans = &oti->oti_quota_trans;
949                 memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
950                 th = &oh->ot_super;
951                 th->th_dev = d;
952                 th->th_result = 0;
953                 th->th_tags = LCT_TX_HANDLE;
954                 oh->ot_credits = 0;
955                 atomic_set(&th->th_refc, 1);
956                 th->th_alloc_size = sizeof(*oh);
957                 oti->oti_dev = osd_dt_dev(d);
958                 INIT_LIST_HEAD(&oh->ot_dcb_list);
959                 osd_th_alloced(oh);
960
961                 memset(oti->oti_declare_ops, 0,
962                                         sizeof(oti->oti_declare_ops));
963                 memset(oti->oti_declare_ops_rb, 0,
964                                         sizeof(oti->oti_declare_ops_rb));
965                 memset(oti->oti_declare_ops_cred, 0,
966                                         sizeof(oti->oti_declare_ops_cred));
967                 oti->oti_rollback = false;
968         }
969         RETURN(th);
970 }
971
972 /*
973  * Concurrency: shouldn't matter.
974  */
975 int osd_trans_start(const struct lu_env *env, struct dt_device *d,
976                     struct thandle *th)
977 {
978         struct osd_thread_info *oti = osd_oti_get(env);
979         struct osd_device  *dev = osd_dt_dev(d);
980         handle_t           *jh;
981         struct osd_thandle *oh;
982         int rc;
983
984         ENTRY;
985
986         LASSERT(current->journal_info == NULL);
987
988         oh = container_of0(th, struct osd_thandle, ot_super);
989         LASSERT(oh != NULL);
990         LASSERT(oh->ot_handle == NULL);
991
992         rc = dt_txn_hook_start(env, d, th);
993         if (rc != 0)
994                 GOTO(out, rc);
995
996         if (unlikely(osd_param_is_not_sane(dev, th))) {
997                 static unsigned long last_printed;
998                 static int last_credits;
999
1000                 CWARN("%.16s: too many transaction credits (%d > %d)\n",
1001                       LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
1002                       oh->ot_credits,
1003                       osd_journal(dev)->j_max_transaction_buffers);
1004                 CWARN("  create: %u/%u, destroy: %u/%u\n",
1005                       oti->oti_declare_ops[OSD_OT_CREATE],
1006                       oti->oti_declare_ops_cred[OSD_OT_CREATE],
1007                       oti->oti_declare_ops[OSD_OT_DESTROY],
1008                       oti->oti_declare_ops_cred[OSD_OT_DESTROY]);
1009                 CWARN("  attr_set: %u/%u, xattr_set: %u/%u\n",
1010                       oti->oti_declare_ops[OSD_OT_ATTR_SET],
1011                       oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
1012                       oti->oti_declare_ops[OSD_OT_XATTR_SET],
1013                       oti->oti_declare_ops_cred[OSD_OT_XATTR_SET]);
1014                 CWARN("  write: %u/%u, punch: %u/%u, quota %u/%u\n",
1015                       oti->oti_declare_ops[OSD_OT_WRITE],
1016                       oti->oti_declare_ops_cred[OSD_OT_WRITE],
1017                       oti->oti_declare_ops[OSD_OT_PUNCH],
1018                       oti->oti_declare_ops_cred[OSD_OT_PUNCH],
1019                       oti->oti_declare_ops[OSD_OT_QUOTA],
1020                       oti->oti_declare_ops_cred[OSD_OT_QUOTA]);
1021                 CWARN("  insert: %u/%u, delete: %u/%u\n",
1022                       oti->oti_declare_ops[OSD_OT_INSERT],
1023                       oti->oti_declare_ops_cred[OSD_OT_INSERT],
1024                       oti->oti_declare_ops[OSD_OT_DELETE],
1025                       oti->oti_declare_ops_cred[OSD_OT_DELETE]);
1026                 CWARN("  ref_add: %u/%u, ref_del: %u/%u\n",
1027                       oti->oti_declare_ops[OSD_OT_REF_ADD],
1028                       oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
1029                       oti->oti_declare_ops[OSD_OT_REF_DEL],
1030                       oti->oti_declare_ops_cred[OSD_OT_REF_DEL]);
1031
1032                 if (last_credits != oh->ot_credits &&
1033                     time_after(jiffies, last_printed + 60 * HZ)) {
1034                         libcfs_debug_dumpstack(NULL);
1035                         last_credits = oh->ot_credits;
1036                         last_printed = jiffies;
1037                 }
1038                 /* XXX Limit the credits to 'max_transaction_buffers', and
1039                  *     let the underlying filesystem to catch the error if
1040                  *     we really need so many credits.
1041                  *
1042                  *     This should be removed when we can calculate the
1043                  *     credits precisely. */
1044                 oh->ot_credits = osd_transaction_size(dev);
1045         }
1046
1047         /*
1048          * XXX temporary stuff. Some abstraction layer should
1049          * be used.
1050          */
1051         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
1052         osd_th_started(oh);
1053         if (!IS_ERR(jh)) {
1054                 oh->ot_handle = jh;
1055                 LASSERT(oti->oti_txns == 0);
1056                 lu_context_init(&th->th_ctx, th->th_tags);
1057                 lu_context_enter(&th->th_ctx);
1058
1059                 lu_device_get(&d->dd_lu_dev);
1060                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
1061                               "osd-tx", th);
1062                 oti->oti_txns++;
1063                 rc = 0;
1064         } else {
1065                 rc = PTR_ERR(jh);
1066         }
1067 out:
1068         RETURN(rc);
1069 }
1070
1071 static int osd_seq_exists(const struct lu_env *env,
1072                               struct osd_device *osd, obd_seq seq)
1073 {
1074         struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
1075         struct seq_server_site  *ss = osd_seq_site(osd);
1076         int                     rc;
1077         ENTRY;
1078
1079         LASSERT(ss != NULL);
1080         LASSERT(ss->ss_server_fld != NULL);
1081
1082         rc = osd_fld_lookup(env, osd, seq, range);
1083         if (rc != 0) {
1084                 if (rc != -ENOENT)
1085                         CERROR("%s: can't lookup FLD sequence "LPX64
1086                                ": rc = %d\n", osd_name(osd), seq, rc);
1087                 RETURN(0);
1088         }
1089
1090         RETURN(ss->ss_node_id == range->lsr_index);
1091 }
1092
1093 /*
1094  * Concurrency: shouldn't matter.
1095  */
1096 static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
1097                           struct thandle *th)
1098 {
1099         int                     rc = 0;
1100         struct osd_thandle     *oh;
1101         struct osd_thread_info *oti = osd_oti_get(env);
1102         struct osd_iobuf       *iobuf = &oti->oti_iobuf;
1103         struct qsd_instance    *qsd = oti->oti_dev->od_quota_slave;
1104         struct lquota_trans    *qtrans;
1105         ENTRY;
1106
1107         oh = container_of0(th, struct osd_thandle, ot_super);
1108
1109         qtrans = oh->ot_quota_trans;
1110         oh->ot_quota_trans = NULL;
1111
1112         if (oh->ot_handle != NULL) {
1113                 handle_t *hdl = oh->ot_handle;
1114
1115                 /*
1116                  * add commit callback
1117                  * notice we don't do this in osd_trans_start()
1118                  * as underlying transaction can change during truncate
1119                  */
1120                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
1121                                          &oh->ot_jcb);
1122
1123                 LASSERT(oti->oti_txns == 1);
1124                 oti->oti_txns--;
1125                 rc = dt_txn_hook_stop(env, th);
1126                 if (rc != 0)
1127                         CERROR("Failure in transaction hook: %d\n", rc);
1128
1129                 /* hook functions might modify th_sync */
1130                 hdl->h_sync = th->th_sync;
1131
1132                 oh->ot_handle = NULL;
1133                 OSD_CHECK_SLOW_TH(oh, oti->oti_dev,
1134                                   rc = ldiskfs_journal_stop(hdl));
1135                 if (rc != 0)
1136                         CERROR("Failure to stop transaction: %d\n", rc);
1137         } else {
1138                 thandle_put(&oh->ot_super);
1139         }
1140
1141         /* inform the quota slave device that the transaction is stopping */
1142         qsd_op_end(env, qsd, qtrans);
1143
1144         /* as we want IO to journal and data IO be concurrent, we don't block
1145          * awaiting data IO completion in osd_do_bio(), instead we wait here
1146          * once transaction is submitted to the journal. all reqular requests
1147          * don't do direct IO (except read/write), thus this wait_event becomes
1148          * no-op for them.
1149          *
1150          * IMPORTANT: we have to wait till any IO submited by the thread is
1151          * completed otherwise iobuf may be corrupted by different request
1152          */
1153         wait_event(iobuf->dr_wait,
1154                        atomic_read(&iobuf->dr_numreqs) == 0);
1155         osd_fini_iobuf(oti->oti_dev, iobuf);
1156         if (!rc)
1157                 rc = iobuf->dr_error;
1158
1159         RETURN(rc);
1160 }
1161
1162 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
1163 {
1164         struct osd_thandle *oh = container_of0(th, struct osd_thandle,
1165                                                ot_super);
1166
1167         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
1168         LASSERT(&dcb->dcb_func != NULL);
1169         list_add(&dcb->dcb_linkage, &oh->ot_dcb_list);
1170
1171         return 0;
1172 }
1173
1174 /*
1175  * Called just before object is freed. Releases all resources except for
1176  * object itself (that is released by osd_object_free()).
1177  *
1178  * Concurrency: no concurrent access is possible that late in object
1179  * life-cycle.
1180  */
1181 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
1182 {
1183         struct osd_object *obj   = osd_obj(l);
1184         struct inode      *inode = obj->oo_inode;
1185
1186         LINVRNT(osd_invariant(obj));
1187
1188         /*
1189          * If object is unlinked remove fid->ino mapping from object index.
1190          */
1191
1192         osd_index_fini(obj);
1193         if (inode != NULL) {
1194                 struct qsd_instance     *qsd = osd_obj2dev(obj)->od_quota_slave;
1195                 qid_t                    uid = i_uid_read(inode);
1196                 qid_t                    gid = i_gid_read(inode);
1197
1198                 iput(inode);
1199                 obj->oo_inode = NULL;
1200
1201                 if (qsd != NULL) {
1202                         struct osd_thread_info  *info = osd_oti_get(env);
1203                         struct lquota_id_info   *qi = &info->oti_qi;
1204
1205                         /* Release granted quota to master if necessary */
1206                         qi->lqi_id.qid_uid = uid;
1207                         qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
1208
1209                         qi->lqi_id.qid_uid = gid;
1210                         qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
1211                 }
1212         }
1213 }
1214
1215 /*
1216  * Concurrency: ->loo_object_release() is called under site spin-lock.
1217  */
1218 static void osd_object_release(const struct lu_env *env,
1219                                struct lu_object *l)
1220 {
1221 }
1222
1223 /*
1224  * Concurrency: shouldn't matter.
1225  */
1226 static int osd_object_print(const struct lu_env *env, void *cookie,
1227                             lu_printer_t p, const struct lu_object *l)
1228 {
1229         struct osd_object *o = osd_obj(l);
1230         struct iam_descr  *d;
1231
1232         if (o->oo_dir != NULL)
1233                 d = o->oo_dir->od_container.ic_descr;
1234         else
1235                 d = NULL;
1236         return (*p)(env, cookie,
1237                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
1238                     o, o->oo_inode,
1239                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
1240                     o->oo_inode ? o->oo_inode->i_generation : 0,
1241                     d ? d->id_ops->id_name : "plain");
1242 }
1243
1244 #define GRANT_FOR_LOCAL_OIDS 32 /* 128kB for last_rcvd, quota files, ... */
1245
1246 /*
1247  * Concurrency: shouldn't matter.
1248  */
1249 int osd_statfs(const struct lu_env *env, struct dt_device *d,
1250                struct obd_statfs *sfs)
1251 {
1252         struct osd_device  *osd = osd_dt_dev(d);
1253         struct super_block *sb = osd_sb(osd);
1254         struct kstatfs     *ksfs;
1255         int result = 0;
1256
1257         if (unlikely(osd->od_mnt == NULL))
1258                 return -EINPROGRESS;
1259
1260         /* osd_lproc.c call this without env, allocate ksfs for that case */
1261         if (unlikely(env == NULL)) {
1262                 OBD_ALLOC_PTR(ksfs);
1263                 if (ksfs == NULL)
1264                         return -ENOMEM;
1265         } else {
1266                 ksfs = &osd_oti_get(env)->oti_ksfs;
1267         }
1268
1269         spin_lock(&osd->od_osfs_lock);
1270         result = sb->s_op->statfs(sb->s_root, ksfs);
1271         if (likely(result == 0)) { /* N.B. statfs can't really fail */
1272                 statfs_pack(sfs, ksfs);
1273                 if (sb->s_flags & MS_RDONLY)
1274                         sfs->os_state = OS_STATE_READONLY;
1275         }
1276
1277         spin_unlock(&osd->od_osfs_lock);
1278
1279         if (unlikely(env == NULL))
1280                 OBD_FREE_PTR(ksfs);
1281
1282         /* Reserve a small amount of space for local objects like last_rcvd,
1283          * llog, quota files, ... */
1284         if (sfs->os_bavail <= GRANT_FOR_LOCAL_OIDS) {
1285                 sfs->os_bavail = 0;
1286         } else {
1287                 sfs->os_bavail -= GRANT_FOR_LOCAL_OIDS;
1288                 /** Take out metadata overhead for indirect blocks */
1289                 sfs->os_bavail -= sfs->os_bavail >> (sb->s_blocksize_bits - 3);
1290         }
1291
1292         return result;
1293 }
1294
1295 /**
1296  * Estimate space needed for file creations. We assume the largest filename
1297  * which is 2^64 - 1, hence a filename of 20 chars.
1298  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
1299  */
1300 #ifdef __LDISKFS_DIR_REC_LEN
1301 #define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
1302 #else
1303 #define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
1304 #endif
1305
1306 /*
1307  * Concurrency: doesn't access mutable data.
1308  */
1309 static void osd_conf_get(const struct lu_env *env,
1310                          const struct dt_device *dev,
1311                          struct dt_device_param *param)
1312 {
1313         struct super_block *sb = osd_sb(osd_dt_dev(dev));
1314         int                ea_overhead;
1315
1316         /*
1317          * XXX should be taken from not-yet-existing fs abstraction layer.
1318          */
1319         param->ddp_max_name_len = LDISKFS_NAME_LEN;
1320         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
1321         param->ddp_block_shift  = sb->s_blocksize_bits;
1322         param->ddp_mount_type     = LDD_MT_LDISKFS;
1323         param->ddp_maxbytes       = sb->s_maxbytes;
1324         /* Overhead estimate should be fairly accurate, so we really take a tiny
1325          * error margin which also avoids fragmenting the filesystem too much */
1326         param->ddp_grant_reserved = 2; /* end up to be 1.9% after conversion */
1327         /* inode are statically allocated, so per-inode space consumption
1328          * is the space consumed by the directory entry */
1329         param->ddp_inodespace     = PER_OBJ_USAGE;
1330         /* per-fragment overhead to be used by the client code */
1331         param->ddp_grant_frag     = 6 * LDISKFS_BLOCK_SIZE(sb);
1332         param->ddp_mntopts      = 0;
1333         if (test_opt(sb, XATTR_USER))
1334                 param->ddp_mntopts |= MNTOPT_USERXATTR;
1335         if (test_opt(sb, POSIX_ACL))
1336                 param->ddp_mntopts |= MNTOPT_ACL;
1337
1338         /* LOD might calculate the max stripe count based on max_ea_size,
1339          * so we need take account in the overhead as well,
1340          * xattr_header + magic + xattr_entry_head */
1341         ea_overhead = sizeof(struct ldiskfs_xattr_header) + sizeof(__u32) +
1342                       LDISKFS_XATTR_LEN(XATTR_NAME_MAX_LEN);
1343
1344 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
1345         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EA_INODE))
1346                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE -
1347                                                                 ea_overhead;
1348         else
1349 #endif
1350                 param->ddp_max_ea_size = sb->s_blocksize - ea_overhead;
1351 }
1352
1353 /*
1354  * Concurrency: shouldn't matter.
1355  */
1356 static int osd_sync(const struct lu_env *env, struct dt_device *d)
1357 {
1358         CDEBUG(D_HA, "syncing OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
1359         return ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
1360 }
1361
1362 /**
1363  * Start commit for OSD device.
1364  *
1365  * An implementation of dt_commit_async method for OSD device.
1366  * Asychronously starts underlayng fs sync and thereby a transaction
1367  * commit.
1368  *
1369  * \param env environment
1370  * \param d dt device
1371  *
1372  * \see dt_device_operations
1373  */
1374 static int osd_commit_async(const struct lu_env *env,
1375                             struct dt_device *d)
1376 {
1377         struct super_block *s = osd_sb(osd_dt_dev(d));
1378         ENTRY;
1379
1380         CDEBUG(D_HA, "async commit OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
1381         RETURN(s->s_op->sync_fs(s, 0));
1382 }
1383
1384 /*
1385  * Concurrency: shouldn't matter.
1386  */
1387
1388 static int osd_ro(const struct lu_env *env, struct dt_device *d)
1389 {
1390         struct super_block *sb = osd_sb(osd_dt_dev(d));
1391         struct block_device *dev = sb->s_bdev;
1392 #ifdef HAVE_DEV_SET_RDONLY
1393         struct block_device *jdev = LDISKFS_SB(sb)->journal_bdev;
1394         int rc = 0;
1395 #else
1396         int rc = -EOPNOTSUPP;
1397 #endif
1398         ENTRY;
1399
1400 #ifdef HAVE_DEV_SET_RDONLY
1401         CERROR("*** setting %s read-only ***\n", osd_dt_dev(d)->od_svname);
1402
1403         if (jdev && (jdev != dev)) {
1404                 CDEBUG(D_IOCTL | D_HA, "set journal dev %lx rdonly\n",
1405                        (long)jdev);
1406                 dev_set_rdonly(jdev);
1407         }
1408         CDEBUG(D_IOCTL | D_HA, "set dev %lx rdonly\n", (long)dev);
1409         dev_set_rdonly(dev);
1410 #else
1411         CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
1412                osd_dt_dev(d)->od_svname, (long)dev, rc);
1413 #endif
1414         RETURN(rc);
1415 }
1416
1417 /*
1418  * Concurrency: serialization provided by callers.
1419  */
1420 static int osd_init_capa_ctxt(const struct lu_env *env, struct dt_device *d,
1421                               int mode, unsigned long timeout, __u32 alg,
1422                               struct lustre_capa_key *keys)
1423 {
1424         struct osd_device *dev = osd_dt_dev(d);
1425         ENTRY;
1426
1427         dev->od_fl_capa = mode;
1428         dev->od_capa_timeout = timeout;
1429         dev->od_capa_alg = alg;
1430         dev->od_capa_keys = keys;
1431         RETURN(0);
1432 }
1433
1434 /**
1435  * Note: we do not count into QUOTA here.
1436  * If we mount with --data_journal we may need more.
1437  */
1438 const int osd_dto_credits_noquota[DTO_NR] = {
1439         /**
1440          * Insert.
1441          * INDEX_EXTRA_TRANS_BLOCKS(8) +
1442          * SINGLEDATA_TRANS_BLOCKS(8)
1443          * XXX Note: maybe iam need more, since iam have more level than
1444          *           EXT3 htree.
1445          */
1446         [DTO_INDEX_INSERT]  = 16,
1447         /**
1448          * Delete
1449          * just modify a single entry, probably merge few within a block
1450          */
1451         [DTO_INDEX_DELETE]  = 1,
1452         /**
1453          * Used for OI scrub
1454          */
1455         [DTO_INDEX_UPDATE]  = 16,
1456         /**
1457          * 4(inode, inode bits, groups, GDT)
1458          *   notice: OI updates are counted separately with DTO_INDEX_INSERT
1459          */
1460         [DTO_OBJECT_CREATE] = 4,
1461         /**
1462          * 4(inode, inode bits, groups, GDT)
1463          *   notice: OI updates are counted separately with DTO_INDEX_DELETE
1464          */
1465         [DTO_OBJECT_DELETE] = 4,
1466         /**
1467          * Attr set credits (inode)
1468          */
1469         [DTO_ATTR_SET_BASE] = 1,
1470         /**
1471          * Xattr set. The same as xattr of EXT3.
1472          * DATA_TRANS_BLOCKS(14)
1473          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
1474          * are also counted in. Do not know why?
1475          */
1476         [DTO_XATTR_SET]     = 14,
1477         /**
1478          * credits for inode change during write.
1479          */
1480         [DTO_WRITE_BASE]    = 3,
1481         /**
1482          * credits for single block write.
1483          */
1484         [DTO_WRITE_BLOCK]   = 14,
1485         /**
1486          * Attr set credits for chown.
1487          * This is extra credits for setattr, and it is null without quota
1488          */
1489         [DTO_ATTR_SET_CHOWN] = 0
1490 };
1491
1492 static const struct dt_device_operations osd_dt_ops = {
1493         .dt_root_get       = osd_root_get,
1494         .dt_statfs         = osd_statfs,
1495         .dt_trans_create   = osd_trans_create,
1496         .dt_trans_start    = osd_trans_start,
1497         .dt_trans_stop     = osd_trans_stop,
1498         .dt_trans_cb_add   = osd_trans_cb_add,
1499         .dt_conf_get       = osd_conf_get,
1500         .dt_sync           = osd_sync,
1501         .dt_ro             = osd_ro,
1502         .dt_commit_async   = osd_commit_async,
1503         .dt_init_capa_ctxt = osd_init_capa_ctxt,
1504 };
1505
1506 static void osd_object_read_lock(const struct lu_env *env,
1507                                  struct dt_object *dt, unsigned role)
1508 {
1509         struct osd_object *obj = osd_dt_obj(dt);
1510         struct osd_thread_info *oti = osd_oti_get(env);
1511
1512         LINVRNT(osd_invariant(obj));
1513
1514         LASSERT(obj->oo_owner != env);
1515         down_read_nested(&obj->oo_sem, role);
1516
1517         LASSERT(obj->oo_owner == NULL);
1518         oti->oti_r_locks++;
1519 }
1520
1521 static void osd_object_write_lock(const struct lu_env *env,
1522                                   struct dt_object *dt, unsigned role)
1523 {
1524         struct osd_object *obj = osd_dt_obj(dt);
1525         struct osd_thread_info *oti = osd_oti_get(env);
1526
1527         LINVRNT(osd_invariant(obj));
1528
1529         LASSERT(obj->oo_owner != env);
1530         down_write_nested(&obj->oo_sem, role);
1531
1532         LASSERT(obj->oo_owner == NULL);
1533         obj->oo_owner = env;
1534         oti->oti_w_locks++;
1535 }
1536
1537 static void osd_object_read_unlock(const struct lu_env *env,
1538                                    struct dt_object *dt)
1539 {
1540         struct osd_object *obj = osd_dt_obj(dt);
1541         struct osd_thread_info *oti = osd_oti_get(env);
1542
1543         LINVRNT(osd_invariant(obj));
1544
1545         LASSERT(oti->oti_r_locks > 0);
1546         oti->oti_r_locks--;
1547         up_read(&obj->oo_sem);
1548 }
1549
1550 static void osd_object_write_unlock(const struct lu_env *env,
1551                                     struct dt_object *dt)
1552 {
1553         struct osd_object *obj = osd_dt_obj(dt);
1554         struct osd_thread_info *oti = osd_oti_get(env);
1555
1556         LINVRNT(osd_invariant(obj));
1557
1558         LASSERT(obj->oo_owner == env);
1559         LASSERT(oti->oti_w_locks > 0);
1560         oti->oti_w_locks--;
1561         obj->oo_owner = NULL;
1562         up_write(&obj->oo_sem);
1563 }
1564
1565 static int osd_object_write_locked(const struct lu_env *env,
1566                                    struct dt_object *dt)
1567 {
1568         struct osd_object *obj = osd_dt_obj(dt);
1569
1570         LINVRNT(osd_invariant(obj));
1571
1572         return obj->oo_owner == env;
1573 }
1574
1575 static int capa_is_sane(const struct lu_env *env,
1576                         struct osd_device *dev,
1577                         struct lustre_capa *capa,
1578                         struct lustre_capa_key *keys)
1579 {
1580         struct osd_thread_info *oti = osd_oti_get(env);
1581         struct lustre_capa *tcapa = &oti->oti_capa;
1582         struct obd_capa *oc;
1583         int i, rc = 0;
1584         ENTRY;
1585
1586         oc = capa_lookup(dev->od_capa_hash, capa, 0);
1587         if (oc) {
1588                 if (capa_is_expired(oc)) {
1589                         DEBUG_CAPA(D_ERROR, capa, "expired");
1590                         rc = -ESTALE;
1591                 }
1592                 capa_put(oc);
1593                 RETURN(rc);
1594         }
1595
1596         if (capa_is_expired_sec(capa)) {
1597                 DEBUG_CAPA(D_ERROR, capa, "expired");
1598                 RETURN(-ESTALE);
1599         }
1600
1601         spin_lock(&capa_lock);
1602         for (i = 0; i < 2; i++) {
1603                 if (keys[i].lk_keyid == capa->lc_keyid) {
1604                         oti->oti_capa_key = keys[i];
1605                         break;
1606                 }
1607         }
1608         spin_unlock(&capa_lock);
1609
1610         if (i == 2) {
1611                 DEBUG_CAPA(D_ERROR, capa, "no matched capa key");
1612                 RETURN(-ESTALE);
1613         }
1614
1615         rc = capa_hmac(tcapa->lc_hmac, capa, oti->oti_capa_key.lk_key);
1616         if (rc)
1617                 RETURN(rc);
1618
1619         if (memcmp(tcapa->lc_hmac, capa->lc_hmac, sizeof(capa->lc_hmac))) {
1620                 DEBUG_CAPA(D_ERROR, capa, "HMAC mismatch");
1621                 RETURN(-EACCES);
1622         }
1623
1624         oc = capa_add(dev->od_capa_hash, capa);
1625         capa_put(oc);
1626
1627         RETURN(0);
1628 }
1629
1630 int osd_object_auth(const struct lu_env *env, struct dt_object *dt,
1631                     struct lustre_capa *capa, __u64 opc)
1632 {
1633         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
1634         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
1635         struct lu_capainfo *lci;
1636         int rc;
1637
1638         if (!osd->od_fl_capa)
1639                 return 0;
1640
1641         if (capa == BYPASS_CAPA)
1642                 return 0;
1643
1644         lci = lu_capainfo_get(env);
1645         if (unlikely(lci == NULL))
1646                 return 0;
1647
1648         if (lci->lci_auth == LC_ID_NONE)
1649                 return 0;
1650
1651         if (capa == NULL) {
1652                 CERROR("%s: no capability provided for FID "DFID": rc = %d\n",
1653                        osd_name(osd), PFID(fid), -EACCES);
1654                 return -EACCES;
1655         }
1656
1657         if (!lu_fid_eq(fid, &capa->lc_fid)) {
1658                 DEBUG_CAPA(D_ERROR, capa, "fid "DFID" mismatch with",
1659                            PFID(fid));
1660                 return -EACCES;
1661         }
1662
1663         if (!capa_opc_supported(capa, opc)) {
1664                 DEBUG_CAPA(D_ERROR, capa, "opc "LPX64" not supported by", opc);
1665                 return -EACCES;
1666         }
1667
1668         rc = capa_is_sane(env, osd, capa, osd->od_capa_keys);
1669         if (rc != 0) {
1670                 DEBUG_CAPA(D_ERROR, capa, "insane: rc = %d", rc);
1671                 return -EACCES;
1672         }
1673
1674         return 0;
1675 }
1676
1677 static struct timespec *osd_inode_time(const struct lu_env *env,
1678                                        struct inode *inode, __u64 seconds)
1679 {
1680         struct osd_thread_info  *oti = osd_oti_get(env);
1681         struct timespec         *t   = &oti->oti_time;
1682
1683         t->tv_sec = seconds;
1684         t->tv_nsec = 0;
1685         *t = timespec_trunc(*t, inode->i_sb->s_time_gran);
1686         return t;
1687 }
1688
1689
1690 static void osd_inode_getattr(const struct lu_env *env,
1691                               struct inode *inode, struct lu_attr *attr)
1692 {
1693         attr->la_valid  |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
1694                            LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
1695                            LA_FLAGS | LA_NLINK | LA_RDEV | LA_BLKSIZE |
1696                            LA_TYPE;
1697
1698         attr->la_atime   = LTIME_S(inode->i_atime);
1699         attr->la_mtime   = LTIME_S(inode->i_mtime);
1700         attr->la_ctime   = LTIME_S(inode->i_ctime);
1701         attr->la_mode    = inode->i_mode;
1702         attr->la_size    = i_size_read(inode);
1703         attr->la_blocks  = inode->i_blocks;
1704         attr->la_uid     = i_uid_read(inode);
1705         attr->la_gid     = i_gid_read(inode);
1706         attr->la_flags   = LDISKFS_I(inode)->i_flags;
1707         attr->la_nlink   = inode->i_nlink;
1708         attr->la_rdev    = inode->i_rdev;
1709         attr->la_blksize = 1 << inode->i_blkbits;
1710         attr->la_blkbits = inode->i_blkbits;
1711 }
1712
1713 static int osd_attr_get(const struct lu_env *env,
1714                         struct dt_object *dt,
1715                         struct lu_attr *attr,
1716                         struct lustre_capa *capa)
1717 {
1718         struct osd_object *obj = osd_dt_obj(dt);
1719
1720         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
1721         LINVRNT(osd_invariant(obj));
1722
1723         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
1724                 return -EACCES;
1725
1726         spin_lock(&obj->oo_guard);
1727         osd_inode_getattr(env, obj->oo_inode, attr);
1728         spin_unlock(&obj->oo_guard);
1729         return 0;
1730 }
1731
1732 static int osd_declare_attr_set(const struct lu_env *env,
1733                                 struct dt_object *dt,
1734                                 const struct lu_attr *attr,
1735                                 struct thandle *handle)
1736 {
1737         struct osd_thandle     *oh;
1738         struct osd_object      *obj;
1739         struct osd_thread_info *info = osd_oti_get(env);
1740         struct lquota_id_info  *qi = &info->oti_qi;
1741         qid_t                   uid;
1742         qid_t                   gid;
1743         long long               bspace;
1744         int                     rc = 0;
1745         bool                    enforce;
1746         ENTRY;
1747
1748         LASSERT(dt != NULL);
1749         LASSERT(handle != NULL);
1750
1751         obj = osd_dt_obj(dt);
1752         LASSERT(osd_invariant(obj));
1753
1754         oh = container_of0(handle, struct osd_thandle, ot_super);
1755         LASSERT(oh->ot_handle == NULL);
1756
1757         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
1758                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
1759
1760         if (attr == NULL || obj->oo_inode == NULL)
1761                 RETURN(rc);
1762
1763         bspace   = obj->oo_inode->i_blocks;
1764         bspace <<= obj->oo_inode->i_sb->s_blocksize_bits;
1765         bspace   = toqb(bspace);
1766
1767         /* Changing ownership is always preformed by super user, it should not
1768          * fail with EDQUOT.
1769          *
1770          * We still need to call the osd_declare_qid() to calculate the journal
1771          * credits for updating quota accounting files and to trigger quota
1772          * space adjustment once the operation is completed.*/
1773         if (attr->la_valid & LA_UID || attr->la_valid & LA_GID) {
1774                 /* USERQUOTA */
1775                 uid = i_uid_read(obj->oo_inode);
1776                 qi->lqi_type = USRQUOTA;
1777                 enforce = (attr->la_valid & LA_UID) && (attr->la_uid != uid);
1778                 /* inode accounting */
1779                 qi->lqi_is_blk = false;
1780
1781                 /* one more inode for the new uid ... */
1782                 qi->lqi_id.qid_uid = attr->la_uid;
1783                 qi->lqi_space      = 1;
1784                 /* Reserve credits for the new uid */
1785                 rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
1786                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1787                         rc = 0;
1788                 if (rc)
1789                         RETURN(rc);
1790
1791                 /* and one less inode for the current uid */
1792                 qi->lqi_id.qid_uid = uid;
1793                 qi->lqi_space      = -1;
1794                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1795                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1796                         rc = 0;
1797                 if (rc)
1798                         RETURN(rc);
1799
1800                 /* block accounting */
1801                 qi->lqi_is_blk = true;
1802
1803                 /* more blocks for the new uid ... */
1804                 qi->lqi_id.qid_uid = attr->la_uid;
1805                 qi->lqi_space      = bspace;
1806                 /*
1807                  * Credits for the new uid has been reserved, re-use "obj"
1808                  * to save credit reservation.
1809                  */
1810                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1811                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1812                         rc = 0;
1813                 if (rc)
1814                         RETURN(rc);
1815
1816                 /* and finally less blocks for the current uid */
1817                 qi->lqi_id.qid_uid = uid;
1818                 qi->lqi_space      = -bspace;
1819                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1820                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1821                         rc = 0;
1822                 if (rc)
1823                         RETURN(rc);
1824
1825                 /* GROUP QUOTA */
1826                 gid = i_gid_read(obj->oo_inode);
1827                 qi->lqi_type = GRPQUOTA;
1828                 enforce = (attr->la_valid & LA_GID) && (attr->la_gid != gid);
1829
1830                 /* inode accounting */
1831                 qi->lqi_is_blk = false;
1832
1833                 /* one more inode for the new gid ... */
1834                 qi->lqi_id.qid_gid = attr->la_gid;
1835                 qi->lqi_space      = 1;
1836                 rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
1837                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1838                         rc = 0;
1839                 if (rc)
1840                         RETURN(rc);
1841
1842                 /* and one less inode for the current gid */
1843                 qi->lqi_id.qid_gid = gid;
1844                 qi->lqi_space      = -1;
1845                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1846                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1847                         rc = 0;
1848                 if (rc)
1849                         RETURN(rc);
1850
1851                 /* block accounting */
1852                 qi->lqi_is_blk = true;
1853
1854                 /* more blocks for the new gid ... */
1855                 qi->lqi_id.qid_gid = attr->la_gid;
1856                 qi->lqi_space      = bspace;
1857                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1858                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1859                         rc = 0;
1860                 if (rc)
1861                         RETURN(rc);
1862
1863                 /* and finally less blocks for the current gid */
1864                 qi->lqi_id.qid_gid = gid;
1865                 qi->lqi_space      = -bspace;
1866                 rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
1867                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1868                         rc = 0;
1869                 if (rc)
1870                         RETURN(rc);
1871         }
1872
1873         RETURN(rc);
1874 }
1875
1876 static int osd_inode_setattr(const struct lu_env *env,
1877                              struct inode *inode, const struct lu_attr *attr)
1878 {
1879         __u64 bits = attr->la_valid;
1880
1881         /* Only allow set size for regular file */
1882         if (!S_ISREG(inode->i_mode))
1883                 bits &= ~(LA_SIZE | LA_BLOCKS);
1884
1885         if (bits == 0)
1886                 return 0;
1887
1888         if (bits & LA_ATIME)
1889                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
1890         if (bits & LA_CTIME)
1891                 inode->i_ctime  = *osd_inode_time(env, inode, attr->la_ctime);
1892         if (bits & LA_MTIME)
1893                 inode->i_mtime  = *osd_inode_time(env, inode, attr->la_mtime);
1894         if (bits & LA_SIZE) {
1895                 LDISKFS_I(inode)->i_disksize = attr->la_size;
1896                 i_size_write(inode, attr->la_size);
1897         }
1898
1899 #if 0
1900         /* OSD should not change "i_blocks" which is used by quota.
1901          * "i_blocks" should be changed by ldiskfs only. */
1902         if (bits & LA_BLOCKS)
1903                 inode->i_blocks = attr->la_blocks;
1904 #endif
1905         if (bits & LA_MODE)
1906                 inode->i_mode = (inode->i_mode & S_IFMT) |
1907                                 (attr->la_mode & ~S_IFMT);
1908         if (bits & LA_UID)
1909                 i_uid_write(inode, attr->la_uid);
1910         if (bits & LA_GID)
1911                 i_gid_write(inode, attr->la_gid);
1912         if (bits & LA_NLINK)
1913                 set_nlink(inode, attr->la_nlink);
1914         if (bits & LA_RDEV)
1915                 inode->i_rdev = attr->la_rdev;
1916
1917         if (bits & LA_FLAGS) {
1918                 /* always keep S_NOCMTIME */
1919                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
1920                                  S_NOCMTIME;
1921         }
1922         return 0;
1923 }
1924
1925 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr)
1926 {
1927         if ((attr->la_valid & LA_UID && attr->la_uid != i_uid_read(inode)) ||
1928             (attr->la_valid & LA_GID && attr->la_gid != i_gid_read(inode))) {
1929                 struct iattr    iattr;
1930                 int             rc;
1931
1932                 ll_vfs_dq_init(inode);
1933                 iattr.ia_valid = 0;
1934                 if (attr->la_valid & LA_UID)
1935                         iattr.ia_valid |= ATTR_UID;
1936                 if (attr->la_valid & LA_GID)
1937                         iattr.ia_valid |= ATTR_GID;
1938                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
1939                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
1940
1941                 rc = ll_vfs_dq_transfer(inode, &iattr);
1942                 if (rc) {
1943                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
1944                                "enforcement enabled on the ldiskfs "
1945                                "filesystem?\n", inode->i_sb->s_id, rc);
1946                         return rc;
1947                 }
1948         }
1949         return 0;
1950 }
1951
1952 static int osd_attr_set(const struct lu_env *env,
1953                         struct dt_object *dt,
1954                         const struct lu_attr *attr,
1955                         struct thandle *handle,
1956                         struct lustre_capa *capa)
1957 {
1958         struct osd_object *obj = osd_dt_obj(dt);
1959         struct inode      *inode;
1960         int rc;
1961
1962         LASSERT(handle != NULL);
1963         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
1964         LASSERT(osd_invariant(obj));
1965
1966         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
1967                 return -EACCES;
1968
1969         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
1970
1971         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING)) {
1972                 struct osd_thread_info  *oti  = osd_oti_get(env);
1973                 const struct lu_fid     *fid0 = lu_object_fid(&dt->do_lu);
1974                 struct lu_fid           *fid1 = &oti->oti_fid;
1975                 struct osd_inode_id     *id   = &oti->oti_id;
1976                 struct iam_path_descr   *ipd;
1977                 struct iam_container    *bag;
1978                 struct osd_thandle      *oh;
1979                 int                      rc;
1980
1981                 fid_cpu_to_be(fid1, fid0);
1982                 memset(id, 1, sizeof(*id));
1983                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
1984                                   fid0)->oi_dir.od_container;
1985                 ipd = osd_idx_ipd_get(env, bag);
1986                 if (unlikely(ipd == NULL))
1987                         RETURN(-ENOMEM);
1988
1989                 oh = container_of0(handle, struct osd_thandle, ot_super);
1990                 rc = iam_update(oh->ot_handle, bag, (const struct iam_key *)fid1,
1991                                 (const struct iam_rec *)id, ipd);
1992                 osd_ipd_put(env, bag, ipd);
1993                 return(rc > 0 ? 0 : rc);
1994         }
1995
1996         inode = obj->oo_inode;
1997
1998         rc = osd_quota_transfer(inode, attr);
1999         if (rc)
2000                 return rc;
2001
2002         spin_lock(&obj->oo_guard);
2003         rc = osd_inode_setattr(env, inode, attr);
2004         spin_unlock(&obj->oo_guard);
2005
2006         if (!rc)
2007                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2008         return rc;
2009 }
2010
2011 struct dentry *osd_child_dentry_get(const struct lu_env *env,
2012                                     struct osd_object *obj,
2013                                     const char *name, const int namelen)
2014 {
2015         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
2016 }
2017
2018 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
2019                       umode_t mode, struct dt_allocation_hint *hint,
2020                       struct thandle *th)
2021 {
2022         int result;
2023         struct osd_device  *osd = osd_obj2dev(obj);
2024         struct osd_thandle *oth;
2025         struct dt_object   *parent = NULL;
2026         struct inode       *inode;
2027
2028         LINVRNT(osd_invariant(obj));
2029         LASSERT(obj->oo_inode == NULL);
2030         LASSERT(obj->oo_hl_head == NULL);
2031
2032         if (S_ISDIR(mode) && ldiskfs_pdo) {
2033                 obj->oo_hl_head =ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
2034                 if (obj->oo_hl_head == NULL)
2035                         return -ENOMEM;
2036         }
2037
2038         oth = container_of(th, struct osd_thandle, ot_super);
2039         LASSERT(oth->ot_handle->h_transaction != NULL);
2040
2041         if (hint && hint->dah_parent)
2042                 parent = hint->dah_parent;
2043
2044         inode = ldiskfs_create_inode(oth->ot_handle,
2045                                      parent ? osd_dt_obj(parent)->oo_inode :
2046                                               osd_sb(osd)->s_root->d_inode,
2047                                      mode);
2048         if (!IS_ERR(inode)) {
2049                 /* Do not update file c/mtime in ldiskfs.
2050                  * NB: don't need any lock because no contention at this
2051                  * early stage */
2052                 inode->i_flags |= S_NOCMTIME;
2053
2054                 /* For new created object, it must be consistent,
2055                  * and it is unnecessary to scrub against it. */
2056                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
2057                 obj->oo_inode = inode;
2058                 result = 0;
2059         } else {
2060                 if (obj->oo_hl_head != NULL) {
2061                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
2062                         obj->oo_hl_head = NULL;
2063                 }
2064                 result = PTR_ERR(inode);
2065         }
2066         LINVRNT(osd_invariant(obj));
2067         return result;
2068 }
2069
2070 enum {
2071         OSD_NAME_LEN = 255
2072 };
2073
2074 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
2075                      struct lu_attr *attr,
2076                      struct dt_allocation_hint *hint,
2077                      struct dt_object_format *dof,
2078                      struct thandle *th)
2079 {
2080         int result;
2081         struct osd_thandle *oth;
2082         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX));
2083
2084         LASSERT(S_ISDIR(attr->la_mode));
2085
2086         oth = container_of(th, struct osd_thandle, ot_super);
2087         LASSERT(oth->ot_handle->h_transaction != NULL);
2088         result = osd_mkfile(info, obj, mode, hint, th);
2089
2090         return result;
2091 }
2092
2093 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
2094                         struct lu_attr *attr,
2095                         struct dt_allocation_hint *hint,
2096                         struct dt_object_format *dof,
2097                         struct thandle *th)
2098 {
2099         int result;
2100         struct osd_thandle *oth;
2101         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
2102
2103         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
2104
2105         LASSERT(S_ISREG(attr->la_mode));
2106
2107         oth = container_of(th, struct osd_thandle, ot_super);
2108         LASSERT(oth->ot_handle->h_transaction != NULL);
2109
2110         result = osd_mkfile(info, obj, mode, hint, th);
2111         if (result == 0) {
2112                 LASSERT(obj->oo_inode != NULL);
2113                 if (feat->dif_flags & DT_IND_VARKEY)
2114                         result = iam_lvar_create(obj->oo_inode,
2115                                                  feat->dif_keysize_max,
2116                                                  feat->dif_ptrsize,
2117                                                  feat->dif_recsize_max,
2118                                                  oth->ot_handle);
2119                 else
2120                         result = iam_lfix_create(obj->oo_inode,
2121                                                  feat->dif_keysize_max,
2122                                                  feat->dif_ptrsize,
2123                                                  feat->dif_recsize_max,
2124                                                  oth->ot_handle);
2125
2126         }
2127         return result;
2128 }
2129
2130 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
2131                      struct lu_attr *attr,
2132                      struct dt_allocation_hint *hint,
2133                      struct dt_object_format *dof,
2134                      struct thandle *th)
2135 {
2136         LASSERT(S_ISREG(attr->la_mode));
2137         return osd_mkfile(info, obj, (attr->la_mode &
2138                                (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2139 }
2140
2141 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
2142                      struct lu_attr *attr,
2143                      struct dt_allocation_hint *hint,
2144                      struct dt_object_format *dof,
2145                      struct thandle *th)
2146 {
2147         LASSERT(S_ISLNK(attr->la_mode));
2148         return osd_mkfile(info, obj, (attr->la_mode &
2149                               (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2150 }
2151
2152 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
2153                      struct lu_attr *attr,
2154                      struct dt_allocation_hint *hint,
2155                      struct dt_object_format *dof,
2156                      struct thandle *th)
2157 {
2158         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
2159         int result;
2160
2161         LINVRNT(osd_invariant(obj));
2162         LASSERT(obj->oo_inode == NULL);
2163         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
2164                 S_ISFIFO(mode) || S_ISSOCK(mode));
2165
2166         result = osd_mkfile(info, obj, mode, hint, th);
2167         if (result == 0) {
2168                 LASSERT(obj->oo_inode != NULL);
2169                 /*
2170                  * This inode should be marked dirty for i_rdev.  Currently
2171                  * that is done in the osd_attr_init().
2172                  */
2173                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
2174                                    attr->la_rdev);
2175         }
2176         LINVRNT(osd_invariant(obj));
2177         return result;
2178 }
2179
2180 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
2181                               struct lu_attr *,
2182                               struct dt_allocation_hint *hint,
2183                               struct dt_object_format *dof,
2184                               struct thandle *);
2185
2186 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
2187 {
2188         osd_obj_type_f result;
2189
2190         switch (type) {
2191         case DFT_DIR:
2192                 result = osd_mkdir;
2193                 break;
2194         case DFT_REGULAR:
2195                 result = osd_mkreg;
2196                 break;
2197         case DFT_SYM:
2198                 result = osd_mksym;
2199                 break;
2200         case DFT_NODE:
2201                 result = osd_mknod;
2202                 break;
2203         case DFT_INDEX:
2204                 result = osd_mk_index;
2205                 break;
2206
2207         default:
2208                 LBUG();
2209                 break;
2210         }
2211         return result;
2212 }
2213
2214
2215 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
2216                         struct dt_object *parent, struct dt_object *child,
2217                         umode_t child_mode)
2218 {
2219         LASSERT(ah);
2220
2221         ah->dah_parent = parent;
2222         ah->dah_mode = child_mode;
2223 }
2224
2225 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
2226                           struct lu_attr *attr, struct dt_object_format *dof)
2227 {
2228         struct inode   *inode = obj->oo_inode;
2229         __u64           valid = attr->la_valid;
2230         int             result;
2231
2232         attr->la_valid &= ~(LA_TYPE | LA_MODE);
2233
2234         if (dof->dof_type != DFT_NODE)
2235                 attr->la_valid &= ~LA_RDEV;
2236         if ((valid & LA_ATIME) && (attr->la_atime == LTIME_S(inode->i_atime)))
2237                 attr->la_valid &= ~LA_ATIME;
2238         if ((valid & LA_CTIME) && (attr->la_ctime == LTIME_S(inode->i_ctime)))
2239                 attr->la_valid &= ~LA_CTIME;
2240         if ((valid & LA_MTIME) && (attr->la_mtime == LTIME_S(inode->i_mtime)))
2241                 attr->la_valid &= ~LA_MTIME;
2242
2243         result = osd_quota_transfer(inode, attr);
2244         if (result)
2245                 return;
2246
2247         if (attr->la_valid != 0) {
2248                 result = osd_inode_setattr(info->oti_env, inode, attr);
2249                 /*
2250                  * The osd_inode_setattr() should always succeed here.  The
2251                  * only error that could be returned is EDQUOT when we are
2252                  * trying to change the UID or GID of the inode. However, this
2253                  * should not happen since quota enforcement is no longer
2254                  * enabled on ldiskfs (lquota takes care of it).
2255                  */
2256                 LASSERTF(result == 0, "%d\n", result);
2257                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2258         }
2259
2260         attr->la_valid = valid;
2261 }
2262
2263 /**
2264  * Helper function for osd_object_create()
2265  *
2266  * \retval 0, on success
2267  */
2268 static int __osd_object_create(struct osd_thread_info *info,
2269                                struct osd_object *obj, struct lu_attr *attr,
2270                                struct dt_allocation_hint *hint,
2271                                struct dt_object_format *dof,
2272                                struct thandle *th)
2273 {
2274         int     result;
2275         __u32   umask;
2276
2277         /* we drop umask so that permissions we pass are not affected */
2278         umask = current->fs->umask;
2279         current->fs->umask = 0;
2280
2281         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
2282                                                   th);
2283         if (result == 0) {
2284                 osd_attr_init(info, obj, attr, dof);
2285                 osd_object_init0(obj);
2286                 /* bz 24037 */
2287                 if (obj->oo_inode && (obj->oo_inode->i_state & I_NEW))
2288                         unlock_new_inode(obj->oo_inode);
2289         }
2290
2291         /* restore previous umask value */
2292         current->fs->umask = umask;
2293
2294         return result;
2295 }
2296
2297 /**
2298  * Helper function for osd_object_create()
2299  *
2300  * \retval 0, on success
2301  */
2302 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
2303                            const struct lu_fid *fid, struct thandle *th)
2304 {
2305         struct osd_thread_info *info = osd_oti_get(env);
2306         struct osd_inode_id    *id   = &info->oti_id;
2307         struct osd_device      *osd  = osd_obj2dev(obj);
2308         struct osd_thandle     *oh;
2309
2310         LASSERT(obj->oo_inode != NULL);
2311
2312         oh = container_of0(th, struct osd_thandle, ot_super);
2313         LASSERT(oh->ot_handle);
2314
2315         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
2316         return osd_oi_insert(info, osd, fid, id, oh->ot_handle, OI_CHECK_FLD);
2317 }
2318
2319 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
2320                    obd_seq seq, struct lu_seq_range *range)
2321 {
2322         struct seq_server_site  *ss = osd_seq_site(osd);
2323
2324         if (fid_seq_is_idif(seq)) {
2325                 fld_range_set_ost(range);
2326                 range->lsr_index = idif_ost_idx(seq);
2327                 return 0;
2328         }
2329
2330         if (!fid_seq_in_fldb(seq)) {
2331                 fld_range_set_mdt(range);
2332                 if (ss != NULL)
2333                         /* FIXME: If ss is NULL, it suppose not get lsr_index
2334                          * at all */
2335                         range->lsr_index = ss->ss_node_id;
2336                 return 0;
2337         }
2338
2339         LASSERT(ss != NULL);
2340         fld_range_set_any(range);
2341         /* OSD will only do local fld lookup */
2342         return fld_local_lookup(env, ss->ss_server_fld, seq, range);
2343 }
2344
2345 /*
2346  * Concurrency: no external locking is necessary.
2347  */
2348 static int osd_declare_object_create(const struct lu_env *env,
2349                                      struct dt_object *dt,
2350                                      struct lu_attr *attr,
2351                                      struct dt_allocation_hint *hint,
2352                                      struct dt_object_format *dof,
2353                                      struct thandle *handle)
2354 {
2355         struct osd_thandle      *oh;
2356         int                      rc;
2357         ENTRY;
2358
2359         LASSERT(handle != NULL);
2360
2361         oh = container_of0(handle, struct osd_thandle, ot_super);
2362         LASSERT(oh->ot_handle == NULL);
2363
2364         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
2365                              osd_dto_credits_noquota[DTO_OBJECT_CREATE]);
2366         /* Reuse idle OI block may cause additional one OI block
2367          * to be changed. */
2368         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
2369                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
2370
2371         /* If this is directory, then we expect . and .. to be inserted as
2372          * well. The one directory block always needs to be created for the
2373          * directory, so we could use DTO_WRITE_BASE here (GDT, block bitmap,
2374          * block), there is no danger of needing a tree for the first block.
2375          */
2376         if (attr && S_ISDIR(attr->la_mode)) {
2377                 osd_trans_declare_op(env, oh, OSD_OT_INSERT,
2378                                      osd_dto_credits_noquota[DTO_WRITE_BASE]);
2379                 osd_trans_declare_op(env, oh, OSD_OT_INSERT, 0);
2380         }
2381
2382         if (!attr)
2383                 RETURN(0);
2384
2385         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid, 1, oh,
2386                                    osd_dt_obj(dt), false, NULL, false);
2387         if (rc != 0)
2388                 RETURN(rc);
2389
2390         RETURN(rc);
2391 }
2392
2393 static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
2394                              struct lu_attr *attr,
2395                              struct dt_allocation_hint *hint,
2396                              struct dt_object_format *dof,
2397                              struct thandle *th)
2398 {
2399         const struct lu_fid    *fid    = lu_object_fid(&dt->do_lu);
2400         struct osd_object      *obj    = osd_dt_obj(dt);
2401         struct osd_thread_info *info   = osd_oti_get(env);
2402         int result;
2403
2404         ENTRY;
2405
2406         LINVRNT(osd_invariant(obj));
2407         LASSERT(!dt_object_exists(dt) && !dt_object_remote(dt));
2408         LASSERT(osd_write_locked(env, obj));
2409         LASSERT(th != NULL);
2410
2411         if (unlikely(fid_is_acct(fid)))
2412                 /* Quota files can't be created from the kernel any more,
2413                  * 'tune2fs -O quota' will take care of creating them */
2414                 RETURN(-EPERM);
2415
2416         osd_trans_exec_op(env, th, OSD_OT_CREATE);
2417         osd_trans_declare_rb(env, th, OSD_OT_REF_ADD);
2418
2419         result = __osd_object_create(info, obj, attr, hint, dof, th);
2420         if (result == 0)
2421                 result = __osd_oi_insert(env, obj, fid, th);
2422
2423         LASSERT(ergo(result == 0,
2424                      dt_object_exists(dt) && !dt_object_remote(dt)));
2425
2426         LASSERT(osd_invariant(obj));
2427         RETURN(result);
2428 }
2429
2430 /**
2431  * Called to destroy on-disk representation of the object
2432  *
2433  * Concurrency: must be locked
2434  */
2435 static int osd_declare_object_destroy(const struct lu_env *env,
2436                                       struct dt_object *dt,
2437                                       struct thandle *th)
2438 {
2439         struct osd_object  *obj = osd_dt_obj(dt);
2440         struct inode       *inode = obj->oo_inode;
2441         struct osd_thandle *oh;
2442         int                 rc;
2443         ENTRY;
2444
2445         oh = container_of0(th, struct osd_thandle, ot_super);
2446         LASSERT(oh->ot_handle == NULL);
2447         LASSERT(inode);
2448
2449         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
2450                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
2451         /* Recycle idle OI leaf may cause additional three OI blocks
2452          * to be changed. */
2453         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
2454                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
2455         /* one less inode */
2456         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
2457                                    -1, oh, obj, false, NULL, false);
2458         if (rc)
2459                 RETURN(rc);
2460         /* data to be truncated */
2461         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
2462                                    0, oh, obj, true, NULL, false);
2463         RETURN(rc);
2464 }
2465
2466 static int osd_object_destroy(const struct lu_env *env,
2467                               struct dt_object *dt,
2468                               struct thandle *th)
2469 {
2470         const struct lu_fid    *fid = lu_object_fid(&dt->do_lu);
2471         struct osd_object      *obj = osd_dt_obj(dt);
2472         struct inode           *inode = obj->oo_inode;
2473         struct osd_device      *osd = osd_obj2dev(obj);
2474         struct osd_thandle     *oh;
2475         int                     result;
2476         ENTRY;
2477
2478         oh = container_of0(th, struct osd_thandle, ot_super);
2479         LASSERT(oh->ot_handle);
2480         LASSERT(inode);
2481         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
2482
2483         if (unlikely(fid_is_acct(fid)))
2484                 RETURN(-EPERM);
2485
2486         if (S_ISDIR(inode->i_mode)) {
2487                 LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1 ||
2488                         inode->i_nlink == 2);
2489                 /* it will check/delete the inode from remote parent,
2490                  * how to optimize it? unlink performance impaction XXX */
2491                 result = osd_delete_from_remote_parent(env, osd, obj, oh);
2492                 if (result != 0 && result != -ENOENT) {
2493                         CERROR("%s: delete inode "DFID": rc = %d\n",
2494                                osd_name(osd), PFID(fid), result);
2495                 }
2496                 spin_lock(&obj->oo_guard);
2497                 clear_nlink(inode);
2498                 spin_unlock(&obj->oo_guard);
2499                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2500         }
2501
2502         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
2503
2504         result = osd_oi_delete(osd_oti_get(env), osd, fid, oh->ot_handle,
2505                                OI_CHECK_FLD);
2506
2507         /* XXX: add to ext3 orphan list */
2508         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
2509
2510         /* not needed in the cache anymore */
2511         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
2512
2513         RETURN(0);
2514 }
2515
2516 /**
2517  * Put the fid into lustre_mdt_attrs, and then place the structure
2518  * inode's ea. This fid should not be altered during the life time
2519  * of the inode.
2520  *
2521  * \retval +ve, on success
2522  * \retval -ve, on error
2523  *
2524  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
2525  */
2526 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
2527                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
2528 {
2529         struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
2530         int                      rc;
2531         ENTRY;
2532
2533         if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
2534                 RETURN(0);
2535
2536         lustre_lma_init(lma, fid, compat, incompat);
2537         lustre_lma_swab(lma);
2538
2539         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma, sizeof(*lma),
2540                              XATTR_CREATE);
2541         /* LMA may already exist, but we need to check that all the
2542          * desired compat/incompat flags have been added. */
2543         if (unlikely(rc == -EEXIST)) {
2544                 if (compat == 0 && incompat == 0)
2545                         RETURN(0);
2546
2547                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
2548                                      XATTR_NAME_LMA, info->oti_mdt_attrs_old,
2549                                      LMA_OLD_SIZE);
2550                 if (rc <= 0)
2551                         RETURN(-EINVAL);
2552
2553                 lustre_lma_swab(lma);
2554                 if (!(~lma->lma_compat & compat) &&
2555                     !(~lma->lma_incompat & incompat))
2556                         RETURN(0);
2557
2558                 lma->lma_compat |= compat;
2559                 lma->lma_incompat |= incompat;
2560                 lustre_lma_swab(lma);
2561                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
2562                                      sizeof(*lma), XATTR_REPLACE);
2563         }
2564
2565         RETURN(rc);
2566 }
2567
2568 /**
2569  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
2570  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
2571  * To have compatilibility with 1.8 ldiskfs driver we need to have
2572  * magic number at start of fid data.
2573  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
2574  * its inmemory API.
2575  */
2576 void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
2577                                   const struct lu_fid *fid)
2578 {
2579         if (!fid_is_namespace_visible(fid) ||
2580             OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
2581                 param->edp_magic = 0;
2582                 return;
2583         }
2584
2585         param->edp_magic = LDISKFS_LUFID_MAGIC;
2586         param->edp_len =  sizeof(struct lu_fid) + 1;
2587         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
2588 }
2589
2590 /**
2591  * Try to read the fid from inode ea into dt_rec.
2592  *
2593  * \param fid object fid.
2594  *
2595  * \retval 0 on success
2596  */
2597 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
2598                           __u32 ino, struct lu_fid *fid,
2599                           struct osd_inode_id *id)
2600 {
2601         struct osd_thread_info *info  = osd_oti_get(env);
2602         struct inode           *inode;
2603         ENTRY;
2604
2605         osd_id_gen(id, ino, OSD_OII_NOGEN);
2606         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
2607         if (IS_ERR(inode))
2608                 RETURN(PTR_ERR(inode));
2609
2610         iput(inode);
2611         RETURN(0);
2612 }
2613
2614 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
2615                                         struct inode *dir,
2616                                         struct inode *parent_dir,
2617                                         const struct lu_fid *dot_fid,
2618                                         const struct lu_fid *dot_dot_fid,
2619                                         struct osd_thandle *oth)
2620 {
2621         struct ldiskfs_dentry_param *dot_ldp;
2622         struct ldiskfs_dentry_param *dot_dot_ldp;
2623
2624         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
2625         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
2626
2627         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
2628         dot_ldp->edp_magic = 0;
2629         return ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
2630                                         dir, dot_ldp, dot_dot_ldp);
2631 }
2632
2633 /**
2634  * Create an local agent inode for remote entry
2635  */
2636 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
2637                                                   struct osd_device *osd,
2638                                                   struct osd_object *pobj,
2639                                                   const struct lu_fid *fid,
2640                                                   __u32 type,
2641                                                   struct thandle *th)
2642 {
2643         struct osd_thread_info  *info = osd_oti_get(env);
2644         struct inode            *local;
2645         struct osd_thandle      *oh;
2646         int                     rc;
2647         ENTRY;
2648
2649         LASSERT(th);
2650         oh = container_of(th, struct osd_thandle, ot_super);
2651         LASSERT(oh->ot_handle->h_transaction != NULL);
2652
2653         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode, type);
2654         if (IS_ERR(local)) {
2655                 CERROR("%s: create local error %d\n", osd_name(osd),
2656                        (int)PTR_ERR(local));
2657                 RETURN(local);
2658         }
2659
2660         /* Set special LMA flag for local agent inode */
2661         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
2662         if (rc != 0) {
2663                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
2664                        osd_name(osd), PFID(fid), rc);
2665                 RETURN(ERR_PTR(rc));
2666         }
2667
2668         if (!S_ISDIR(type))
2669                 RETURN(local);
2670
2671         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
2672                                          lu_object_fid(&pobj->oo_dt.do_lu),
2673                                          fid, oh);
2674         if (rc != 0) {
2675                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
2676                         osd_name(osd), PFID(fid), rc);
2677                 RETURN(ERR_PTR(rc));
2678         }
2679
2680         RETURN(local);
2681 }
2682
2683 /**
2684  * Delete local agent inode for remote entry
2685  */
2686 static int osd_delete_local_agent_inode(const struct lu_env *env,
2687                                         struct osd_device *osd,
2688                                         const struct lu_fid *fid,
2689                                         __u32 ino, struct osd_thandle *oh)
2690 {
2691         struct osd_thread_info  *oti = osd_oti_get(env);
2692         struct osd_inode_id     *id = &oti->oti_id;
2693         struct inode            *inode;
2694         ENTRY;
2695
2696         id->oii_ino = le32_to_cpu(ino);
2697         id->oii_gen = OSD_OII_NOGEN;
2698         inode = osd_iget(oti, osd, id);
2699         if (IS_ERR(inode)) {
2700                 CERROR("%s: iget error "DFID" id %u:%u\n", osd_name(osd),
2701                        PFID(fid), id->oii_ino, id->oii_gen);
2702                 RETURN(PTR_ERR(inode));
2703         }
2704
2705         clear_nlink(inode);
2706         mark_inode_dirty(inode);
2707         CDEBUG(D_INODE, "%s: delete remote inode "DFID" %lu\n",
2708                 osd_name(osd), PFID(fid), inode->i_ino);
2709         iput(inode);
2710         RETURN(0);
2711 }
2712
2713 /**
2714  * OSD layer object create function for interoperability mode (b11826).
2715  * This is mostly similar to osd_object_create(). Only difference being, fid is
2716  * inserted into inode ea here.
2717  *
2718  * \retval   0, on success
2719  * \retval -ve, on error
2720  */
2721 static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
2722                                 struct lu_attr *attr,
2723                                 struct dt_allocation_hint *hint,
2724                                 struct dt_object_format *dof,
2725                                 struct thandle *th)
2726 {
2727         const struct lu_fid    *fid    = lu_object_fid(&dt->do_lu);
2728         struct osd_object      *obj    = osd_dt_obj(dt);
2729         struct osd_thread_info *info   = osd_oti_get(env);
2730         int                     result;
2731
2732         ENTRY;
2733
2734         LASSERT(osd_invariant(obj));
2735         LASSERT(!dt_object_exists(dt) && !dt_object_remote(dt));
2736         LASSERT(osd_write_locked(env, obj));
2737         LASSERT(th != NULL);
2738
2739         if (unlikely(fid_is_acct(fid)))
2740                 /* Quota files can't be created from the kernel any more,
2741                  * 'tune2fs -O quota' will take care of creating them */
2742                 RETURN(-EPERM);
2743
2744         osd_trans_exec_op(env, th, OSD_OT_CREATE);
2745         osd_trans_declare_rb(env, th, OSD_OT_REF_ADD);
2746
2747         result = __osd_object_create(info, obj, attr, hint, dof, th);
2748         if (result == 0)
2749                 result = osd_ea_fid_set(info, obj->oo_inode, fid,
2750                                 fid_is_on_ost(info, osd_obj2dev(obj),
2751                                               fid, OI_CHECK_FLD) ?
2752                                 LMAC_FID_ON_OST : 0, 0);
2753
2754         if (result == 0)
2755                 result = __osd_oi_insert(env, obj, fid, th);
2756
2757         LASSERT(ergo(result == 0,
2758                      dt_object_exists(dt) && !dt_object_remote(dt)));
2759         LINVRNT(osd_invariant(obj));
2760         RETURN(result);
2761 }
2762
2763 static int osd_declare_object_ref_add(const struct lu_env *env,
2764                                       struct dt_object *dt,
2765                                       struct thandle *handle)
2766 {
2767         struct osd_thandle       *oh;
2768
2769         /* it's possible that object doesn't exist yet */
2770         LASSERT(handle != NULL);
2771
2772         oh = container_of0(handle, struct osd_thandle, ot_super);
2773         LASSERT(oh->ot_handle == NULL);
2774
2775         osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
2776                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2777
2778         return 0;
2779 }
2780
2781 /*
2782  * Concurrency: @dt is write locked.
2783  */
2784 static int osd_object_ref_add(const struct lu_env *env,
2785                               struct dt_object *dt, struct thandle *th)
2786 {
2787         struct osd_object  *obj = osd_dt_obj(dt);
2788         struct inode       *inode = obj->oo_inode;
2789         struct osd_thandle *oh;
2790         int                 rc = 0;
2791
2792         LINVRNT(osd_invariant(obj));
2793         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2794         LASSERT(osd_write_locked(env, obj));
2795         LASSERT(th != NULL);
2796
2797         oh = container_of0(th, struct osd_thandle, ot_super);
2798         LASSERT(oh->ot_handle != NULL);
2799
2800         osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
2801
2802         CDEBUG(D_INODE, DFID" increase nlink %d\n",
2803                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
2804         /*
2805          * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
2806          * (65000) subdirectories by storing "1" in i_nlink if the link count
2807          * would otherwise overflow. Directory tranversal tools understand
2808          * that (st_nlink == 1) indicates that the filesystem dose not track
2809          * hard links count on the directory, and will not abort subdirectory
2810          * scanning early once (st_nlink - 2) subdirs have been found.
2811          *
2812          * This also has to properly handle the case of inodes with nlink == 0
2813          * in case they are being linked into the PENDING directory
2814          */
2815         spin_lock(&obj->oo_guard);
2816         if (unlikely(inode->i_nlink == 0))
2817                 /* inc_nlink from 0 may cause WARN_ON */
2818                 set_nlink(inode, 1);
2819         else {
2820                 ldiskfs_inc_count(oh->ot_handle, inode);
2821                 if (!S_ISDIR(inode->i_mode))
2822                         LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
2823         }
2824         spin_unlock(&obj->oo_guard);
2825
2826         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2827         LINVRNT(osd_invariant(obj));
2828
2829         return rc;
2830 }
2831
2832 static int osd_declare_object_ref_del(const struct lu_env *env,
2833                                       struct dt_object *dt,
2834                                       struct thandle *handle)
2835 {
2836         struct osd_thandle *oh;
2837
2838         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2839         LASSERT(handle != NULL);
2840
2841         oh = container_of0(handle, struct osd_thandle, ot_super);
2842         LASSERT(oh->ot_handle == NULL);
2843
2844         osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
2845                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2846
2847         return 0;
2848 }
2849
2850 /*
2851  * Concurrency: @dt is write locked.
2852  */
2853 static int osd_object_ref_del(const struct lu_env *env, struct dt_object *dt,
2854                               struct thandle *th)
2855 {
2856         struct osd_object       *obj = osd_dt_obj(dt);
2857         struct inode            *inode = obj->oo_inode;
2858         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
2859         struct osd_thandle      *oh;
2860
2861         LINVRNT(osd_invariant(obj));
2862         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2863         LASSERT(osd_write_locked(env, obj));
2864         LASSERT(th != NULL);
2865
2866         oh = container_of0(th, struct osd_thandle, ot_super);
2867         LASSERT(oh->ot_handle != NULL);
2868
2869         osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
2870
2871         spin_lock(&obj->oo_guard);
2872         /* That can be result of upgrade from old Lustre version and
2873          * applied only to local files.  Just skip this ref_del call.
2874          * ext4_unlink() only treats this as a warning, don't LASSERT here.*/
2875         if (inode->i_nlink == 0) {
2876                 CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
2877                              D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
2878                              ", maybe an upgraded file? (LU-3915)\n",
2879                              osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
2880                 spin_unlock(&obj->oo_guard);
2881                 return 0;
2882         }
2883
2884         CDEBUG(D_INODE, DFID" decrease nlink %d\n",
2885                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
2886
2887         ldiskfs_dec_count(oh->ot_handle, inode);
2888         spin_unlock(&obj->oo_guard);
2889
2890         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2891         LINVRNT(osd_invariant(obj));
2892
2893         return 0;
2894 }
2895
2896 /*
2897  * Get the 64-bit version for an inode.
2898  */
2899 static int osd_object_version_get(const struct lu_env *env,
2900                                   struct dt_object *dt, dt_obj_version_t *ver)
2901 {
2902         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2903
2904         CDEBUG(D_INODE, "Get version "LPX64" for inode %lu\n",
2905                LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2906         *ver = LDISKFS_I(inode)->i_fs_version;
2907         return 0;
2908 }
2909
2910 /*
2911  * Concurrency: @dt is read locked.
2912  */
2913 static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
2914                          struct lu_buf *buf, const char *name,
2915                          struct lustre_capa *capa)
2916 {
2917         struct osd_object      *obj    = osd_dt_obj(dt);
2918         struct inode           *inode  = obj->oo_inode;
2919         struct osd_thread_info *info   = osd_oti_get(env);
2920         struct dentry          *dentry = &info->oti_obj_dentry;
2921
2922         /* version get is not real XATTR but uses xattr API */
2923         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2924                 /* for version we are just using xattr API but change inode
2925                  * field instead */
2926                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
2927                 osd_object_version_get(env, dt, buf->lb_buf);
2928                 return sizeof(dt_obj_version_t);
2929         }
2930
2931         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2932         LASSERT(inode->i_op != NULL && inode->i_op->getxattr != NULL);
2933
2934         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
2935                 return -EACCES;
2936
2937         return __osd_xattr_get(inode, dentry, name, buf->lb_buf, buf->lb_len);
2938 }
2939
2940
2941 static int osd_declare_xattr_set(const struct lu_env *env,
2942                                  struct dt_object *dt,
2943                                  const struct lu_buf *buf, const char *name,
2944                                  int fl, struct thandle *handle)
2945 {
2946         struct osd_thandle *oh;
2947         int credits;
2948         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
2949
2950         LASSERT(handle != NULL);
2951
2952         oh = container_of0(handle, struct osd_thandle, ot_super);
2953         LASSERT(oh->ot_handle == NULL);
2954
2955         /* optimistic optimization: LMA is set first and usually fit inode */
2956         if (strcmp(name, XATTR_NAME_LMA) == 0) {
2957                 if (dt_object_exists(dt))
2958                         credits = 0;
2959                 else
2960                         credits = 1;
2961         } else if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2962                 credits = 1;
2963         } else {
2964                 credits = osd_dto_credits_noquota[DTO_XATTR_SET];
2965                 if (buf && buf->lb_len > sb->s_blocksize) {
2966                         credits *= (buf->lb_len + sb->s_blocksize - 1) >>
2967                                         sb->s_blocksize_bits;
2968                 }
2969                 /*
2970                  * xattr set may involve inode quota change, reserve credits for
2971                  * dquot_initialize()
2972                  */
2973                 oh->ot_credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
2974         }
2975
2976         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET, credits);
2977
2978         return 0;
2979 }
2980
2981 /*
2982  * Set the 64-bit version for object
2983  */
2984 static void osd_object_version_set(const struct lu_env *env,
2985                                    struct dt_object *dt,
2986                                    dt_obj_version_t *new_version)
2987 {
2988         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2989
2990         CDEBUG(D_INODE, "Set version "LPX64" (old "LPX64") for inode %lu\n",
2991                *new_version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2992
2993         LDISKFS_I(inode)->i_fs_version = *new_version;
2994         /** Version is set after all inode operations are finished,
2995          *  so we should mark it dirty here */
2996         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2997 }
2998
2999 /*
3000  * Concurrency: @dt is write locked.
3001  */
3002 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
3003                          const struct lu_buf *buf, const char *name, int fl,
3004                          struct thandle *handle, struct lustre_capa *capa)
3005 {
3006         struct osd_object      *obj      = osd_dt_obj(dt);
3007         struct inode           *inode    = obj->oo_inode;
3008         struct osd_thread_info *info     = osd_oti_get(env);
3009         int                     fs_flags = 0;
3010         ENTRY;
3011
3012         LASSERT(handle != NULL);
3013
3014         /* version set is not real XATTR */
3015         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
3016                 /* for version we are just using xattr API but change inode
3017                  * field instead */
3018                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
3019                 osd_object_version_set(env, dt, buf->lb_buf);
3020                 return sizeof(dt_obj_version_t);
3021         }
3022
3023         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
3024                 return -EACCES;
3025
3026         CDEBUG(D_INODE, DFID" set xattr '%s' with size %zd\n",
3027                PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
3028
3029         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
3030         if (fl & LU_XATTR_REPLACE)
3031                 fs_flags |= XATTR_REPLACE;
3032
3033         if (fl & LU_XATTR_CREATE)
3034                 fs_flags |= XATTR_CREATE;
3035
3036         if (strcmp(name, XATTR_NAME_LMV) == 0) {
3037                 struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
3038                 int                      rc;
3039
3040                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
3041                 if (rc != 0)
3042                         RETURN(rc);
3043
3044                 lma->lma_incompat |= LMAI_STRIPED;
3045                 lustre_lma_swab(lma);
3046                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3047                                      sizeof(*lma), XATTR_REPLACE);
3048                 if (rc != 0)
3049                         RETURN(rc);
3050         }
3051
3052         return __osd_xattr_set(info, inode, name, buf->lb_buf, buf->lb_len,
3053                                fs_flags);
3054 }
3055
3056 /*
3057  * Concurrency: @dt is read locked.
3058  */
3059 static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
3060                           struct lu_buf *buf, struct lustre_capa *capa)
3061 {
3062         struct osd_object      *obj    = osd_dt_obj(dt);
3063         struct inode           *inode  = obj->oo_inode;
3064         struct osd_thread_info *info   = osd_oti_get(env);
3065         struct dentry          *dentry = &info->oti_obj_dentry;
3066
3067         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3068         LASSERT(inode->i_op != NULL && inode->i_op->listxattr != NULL);
3069
3070         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
3071                 return -EACCES;
3072
3073         dentry->d_inode = inode;
3074         dentry->d_sb = inode->i_sb;
3075         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
3076 }
3077
3078 static int osd_declare_xattr_del(const struct lu_env *env,
3079                                  struct dt_object *dt, const char *name,
3080                                  struct thandle *handle)
3081 {
3082         struct osd_thandle *oh;
3083         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
3084
3085         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3086         LASSERT(handle != NULL);
3087
3088         oh = container_of0(handle, struct osd_thandle, ot_super);
3089         LASSERT(oh->ot_handle == NULL);
3090
3091         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
3092                              osd_dto_credits_noquota[DTO_XATTR_SET]);
3093         /*
3094          * xattr del may involve inode quota change, reserve credits for
3095          * dquot_initialize()
3096          */
3097         oh->ot_credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
3098
3099         return 0;
3100 }
3101
3102 /*
3103  * Concurrency: @dt is write locked.
3104  */
3105 static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
3106                          const char *name, struct thandle *handle,
3107                          struct lustre_capa *capa)
3108 {
3109         struct osd_object      *obj    = osd_dt_obj(dt);
3110         struct inode           *inode  = obj->oo_inode;
3111         struct osd_thread_info *info   = osd_oti_get(env);
3112         struct dentry          *dentry = &info->oti_obj_dentry;
3113         int                     rc;
3114
3115         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3116         LASSERT(inode->i_op != NULL && inode->i_op->removexattr != NULL);
3117         LASSERT(handle != NULL);
3118
3119         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
3120                 return -EACCES;
3121
3122         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
3123
3124         ll_vfs_dq_init(inode);
3125         dentry->d_inode = inode;
3126         dentry->d_sb = inode->i_sb;
3127         rc = inode->i_op->removexattr(dentry, name);
3128         return rc;
3129 }
3130
3131 static struct obd_capa *osd_capa_get(const struct lu_env *env,
3132                                      struct dt_object *dt,
3133                                      struct lustre_capa *old, __u64 opc)
3134 {
3135         struct osd_thread_info *info = osd_oti_get(env);
3136         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
3137         struct osd_object *obj = osd_dt_obj(dt);
3138         struct osd_device *osd = osd_obj2dev(obj);
3139         struct lustre_capa_key *key = &info->oti_capa_key;
3140         struct lustre_capa *capa = &info->oti_capa;
3141         struct obd_capa *oc;
3142         struct lu_capainfo *lci;
3143         int rc;
3144         ENTRY;
3145
3146         if (!osd->od_fl_capa)
3147                 RETURN(ERR_PTR(-ENOENT));
3148
3149         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3150         LINVRNT(osd_invariant(obj));
3151
3152         /* renewal sanity check */
3153         if (old && osd_object_auth(env, dt, old, opc))
3154                 RETURN(ERR_PTR(-EACCES));
3155
3156         lci = lu_capainfo_get(env);
3157         if (unlikely(lci == NULL))
3158                 RETURN(ERR_PTR(-ENOENT));
3159
3160         switch (lci->lci_auth) {
3161         case LC_ID_NONE:
3162                 RETURN(NULL);
3163         case LC_ID_PLAIN:
3164                 capa->lc_uid = i_uid_read(obj->oo_inode);
3165                 capa->lc_gid = i_gid_read(obj->oo_inode);
3166                 capa->lc_flags = LC_ID_PLAIN;
3167                 break;
3168         case LC_ID_CONVERT: {
3169                 __u32 d[4], s[4];
3170
3171                 s[0] = i_uid_read(obj->oo_inode);
3172                 cfs_get_random_bytes(&(s[1]), sizeof(__u32));
3173                 s[2] = i_uid_read(obj->oo_inode);
3174                 cfs_get_random_bytes(&(s[3]), sizeof(__u32));
3175                 rc = capa_encrypt_id(d, s, key->lk_key, CAPA_HMAC_KEY_MAX_LEN);
3176                 if (unlikely(rc))
3177                         RETURN(ERR_PTR(rc));
3178
3179                 capa->lc_uid   = ((__u64)d[1] << 32) | d[0];
3180                 capa->lc_gid   = ((__u64)d[3] << 32) | d[2];
3181                 capa->lc_flags = LC_ID_CONVERT;
3182                 break;
3183         }
3184         default:
3185                 RETURN(ERR_PTR(-EINVAL));
3186         }
3187
3188         capa->lc_fid = *fid;
3189         capa->lc_opc = opc;
3190         capa->lc_flags |= osd->od_capa_alg << 24;
3191         capa->lc_timeout = osd->od_capa_timeout;
3192         capa->lc_expiry = 0;
3193
3194         oc = capa_lookup(osd->od_capa_hash, capa, 1);
3195         if (oc) {
3196                 LASSERT(!capa_is_expired(oc));
3197                 RETURN(oc);
3198         }
3199
3200         spin_lock(&capa_lock);
3201         *key = osd->od_capa_keys[1];
3202         spin_unlock(&capa_lock);
3203
3204         capa->lc_keyid = key->lk_keyid;
3205         capa->lc_expiry = cfs_time_current_sec() + osd->od_capa_timeout;
3206
3207         rc = capa_hmac(capa->lc_hmac, capa, key->lk_key);
3208         if (rc) {
3209                 DEBUG_CAPA(D_ERROR, capa, "HMAC failed: %d for", rc);
3210                 RETURN(ERR_PTR(rc));
3211         }
3212
3213         oc = capa_add(osd->od_capa_hash, capa);
3214         RETURN(oc);
3215 }
3216
3217 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt,
3218                            __u64 start, __u64 end)
3219 {
3220         struct osd_object       *obj    = osd_dt_obj(dt);
3221         struct inode            *inode  = obj->oo_inode;
3222         struct osd_thread_info  *info   = osd_oti_get(env);
3223         struct dentry           *dentry = &info->oti_obj_dentry;
3224         struct file             *file   = &info->oti_file;
3225         int                     rc;
3226
3227         ENTRY;
3228
3229         dentry->d_inode = inode;
3230         dentry->d_sb = inode->i_sb;
3231         file->f_dentry = dentry;
3232         file->f_mapping = inode->i_mapping;
3233         file->f_op = inode->i_fop;
3234         set_file_inode(file, inode);
3235
3236 #ifdef HAVE_FILE_FSYNC_4ARGS
3237         rc = file->f_op->fsync(file, start, end, 0);
3238 #elif defined(HAVE_FILE_FSYNC_2ARGS)
3239         mutex_lock(&inode->i_mutex);
3240         rc = file->f_op->fsync(file, 0);
3241         mutex_unlock(&inode->i_mutex);
3242 #else
3243         mutex_lock(&inode->i_mutex);
3244         rc = file->f_op->fsync(file, dentry, 0);
3245         mutex_unlock(&inode->i_mutex);
3246 #endif
3247
3248         RETURN(rc);
3249 }
3250
3251 static int osd_data_get(const struct lu_env *env, struct dt_object *dt,
3252                         void **data)
3253 {
3254         struct osd_object *obj = osd_dt_obj(dt);
3255         ENTRY;
3256
3257         *data = (void *)obj->oo_inode;
3258         RETURN(0);
3259 }
3260
3261 /*
3262  * Index operations.
3263  */
3264
3265 static int osd_iam_index_probe(const struct lu_env *env, struct osd_object *o,
3266                            const struct dt_index_features *feat)
3267 {
3268         struct iam_descr *descr;
3269
3270         if (osd_object_is_root(o))
3271                 return feat == &dt_directory_features;
3272
3273         LASSERT(o->oo_dir != NULL);
3274
3275         descr = o->oo_dir->od_container.ic_descr;
3276         if (feat == &dt_directory_features) {
3277                 if (descr->id_rec_size == sizeof(struct osd_fid_pack))
3278                         return 1;
3279                 else
3280                         return 0;
3281         } else {
3282                 return
3283                         feat->dif_keysize_min <= descr->id_key_size &&
3284                         descr->id_key_size <= feat->dif_keysize_max &&
3285                         feat->dif_recsize_min <= descr->id_rec_size &&
3286                         descr->id_rec_size <= feat->dif_recsize_max &&
3287                         !(feat->dif_flags & (DT_IND_VARKEY |
3288                                              DT_IND_VARREC | DT_IND_NONUNQ)) &&
3289                         ergo(feat->dif_flags & DT_IND_UPDATE,
3290                              1 /* XXX check that object (and file system) is
3291                                 * writable */);
3292         }
3293 }
3294
3295 static int osd_iam_container_init(const struct lu_env *env,
3296                                   struct osd_object *obj,
3297                                   struct osd_directory *dir)
3298 {
3299         struct iam_container *bag = &dir->od_container;
3300         int result;
3301
3302         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
3303         if (result != 0)
3304                 return result;
3305
3306         result = iam_container_setup(bag);
3307         if (result == 0)
3308                 obj->oo_dt.do_index_ops = &osd_index_iam_ops;
3309         else
3310                 iam_container_fini(bag);
3311
3312         return result;
3313 }
3314
3315
3316 /*
3317  * Concurrency: no external locking is necessary.
3318  */
3319 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
3320                          const struct dt_index_features *feat)
3321 {
3322         int                      result;
3323         int                      skip_iam = 0;
3324         struct osd_object       *obj = osd_dt_obj(dt);
3325
3326         LINVRNT(osd_invariant(obj));
3327
3328         if (osd_object_is_root(obj)) {
3329                 dt->do_index_ops = &osd_index_ea_ops;
3330                 result = 0;
3331         } else if (feat == &dt_directory_features) {
3332                 dt->do_index_ops = &osd_index_ea_ops;
3333                 if (obj->oo_inode != NULL && S_ISDIR(obj->oo_inode->i_mode))
3334                         result = 0;
3335                 else
3336                         result = -ENOTDIR;
3337                 skip_iam = 1;
3338         } else if (unlikely(feat == &dt_otable_features)) {
3339                 dt->do_index_ops = &osd_otable_ops;
3340                 return 0;
3341         } else if (unlikely(feat == &dt_acct_features)) {
3342                 dt->do_index_ops = &osd_acct_index_ops;
3343                 result = 0;
3344                 skip_iam = 1;
3345         } else if (!osd_has_index(obj)) {
3346                 struct osd_directory *dir;
3347
3348                 OBD_ALLOC_PTR(dir);
3349                 if (dir != NULL) {
3350
3351                         spin_lock(&obj->oo_guard);
3352                         if (obj->oo_dir == NULL)
3353                                 obj->oo_dir = dir;
3354                         else
3355                                 /*
3356                                  * Concurrent thread allocated container data.
3357                                  */
3358                                 OBD_FREE_PTR(dir);
3359                         spin_unlock(&obj->oo_guard);
3360                         /*
3361                          * Now, that we have container data, serialize its
3362                          * initialization.
3363                          */
3364                         down_write(&obj->oo_ext_idx_sem);
3365                         /*
3366                          * recheck under lock.
3367                          */
3368                         if (!osd_has_index(obj))
3369                                 result = osd_iam_container_init(env, obj,
3370                                                                 obj->oo_dir);
3371                         else
3372                                 result = 0;
3373                         up_write(&obj->oo_ext_idx_sem);
3374                 } else {
3375                         result = -ENOMEM;
3376                 }
3377         } else {
3378                 result = 0;
3379         }
3380
3381         if (result == 0 && skip_iam == 0) {
3382                 if (!osd_iam_index_probe(env, obj, feat))
3383                         result = -ENOTDIR;
3384         }
3385         LINVRNT(osd_invariant(obj));
3386
3387         if (result == 0 && is_quota_glb_feat(feat) &&
3388             fid_seq(lu_object_fid(&dt->do_lu)) == FID_SEQ_QUOTA_GLB)
3389                 result = osd_quota_migration(env, dt, feat);
3390
3391         return result;
3392 }
3393
3394 static int osd_otable_it_attr_get(const struct lu_env *env,
3395                                  struct dt_object *dt,
3396                                  struct lu_attr *attr,
3397                                  struct lustre_capa *capa)
3398 {
3399         attr->la_valid = 0;
3400         return 0;
3401 }
3402
3403 static const struct dt_object_operations osd_obj_ops = {
3404         .do_read_lock         = osd_object_read_lock,
3405         .do_write_lock        = osd_object_write_lock,
3406         .do_read_unlock       = osd_object_read_unlock,
3407         .do_write_unlock      = osd_object_write_unlock,
3408         .do_write_locked      = osd_object_write_locked,
3409         .do_attr_get          = osd_attr_get,
3410         .do_declare_attr_set  = osd_declare_attr_set,
3411         .do_attr_set          = osd_attr_set,
3412         .do_ah_init           = osd_ah_init,
3413         .do_declare_create    = osd_declare_object_create,
3414         .do_create            = osd_object_create,
3415         .do_declare_destroy   = osd_declare_object_destroy,
3416         .do_destroy           = osd_object_destroy,
3417         .do_index_try         = osd_index_try,
3418         .do_declare_ref_add   = osd_declare_object_ref_add,
3419         .do_ref_add           = osd_object_ref_add,
3420         .do_declare_ref_del   = osd_declare_object_ref_del,
3421         .do_ref_del           = osd_object_ref_del,
3422         .do_xattr_get         = osd_xattr_get,
3423         .do_declare_xattr_set = osd_declare_xattr_set,
3424         .do_xattr_set         = osd_xattr_set,
3425         .do_declare_xattr_del = osd_declare_xattr_del,
3426         .do_xattr_del         = osd_xattr_del,
3427         .do_xattr_list        = osd_xattr_list,
3428         .do_capa_get          = osd_capa_get,
3429         .do_object_sync       = osd_object_sync,
3430         .do_data_get          = osd_data_get,
3431 };
3432
3433 /**
3434  * dt_object_operations for interoperability mode
3435  * (i.e. to run 2.0 mds on 1.8 disk) (b11826)
3436  */
3437 static const struct dt_object_operations osd_obj_ea_ops = {
3438         .do_read_lock         = osd_object_read_lock,
3439         .do_write_lock        = osd_object_write_lock,
3440         .do_read_unlock       = osd_object_read_unlock,
3441         .do_write_unlock      = osd_object_write_unlock,
3442         .do_write_locked      = osd_object_write_locked,
3443         .do_attr_get          = osd_attr_get,
3444         .do_declare_attr_set  = osd_declare_attr_set,
3445         .do_attr_set          = osd_attr_set,
3446         .do_ah_init           = osd_ah_init,
3447         .do_declare_create    = osd_declare_object_create,
3448         .do_create            = osd_object_ea_create,
3449         .do_declare_destroy   = osd_declare_object_destroy,
3450         .do_destroy           = osd_object_destroy,
3451         .do_index_try         = osd_index_try,
3452         .do_declare_ref_add   = osd_declare_object_ref_add,
3453         .do_ref_add           = osd_object_ref_add,
3454         .do_declare_ref_del   = osd_declare_object_ref_del,
3455         .do_ref_del           = osd_object_ref_del,
3456         .do_xattr_get         = osd_xattr_get,
3457         .do_declare_xattr_set = osd_declare_xattr_set,
3458         .do_xattr_set         = osd_xattr_set,
3459         .do_declare_xattr_del = osd_declare_xattr_del,
3460         .do_xattr_del         = osd_xattr_del,
3461         .do_xattr_list        = osd_xattr_list,
3462         .do_capa_get          = osd_capa_get,
3463         .do_object_sync       = osd_object_sync,
3464         .do_data_get          = osd_data_get,
3465 };
3466
3467 static const struct dt_object_operations osd_obj_otable_it_ops = {
3468         .do_attr_get    = osd_otable_it_attr_get,
3469         .do_index_try   = osd_index_try,
3470 };
3471
3472 static int osd_index_declare_iam_delete(const struct lu_env *env,
3473                                         struct dt_object *dt,
3474                                         const struct dt_key *key,
3475                                         struct thandle *handle)
3476 {
3477         struct osd_thandle    *oh;
3478
3479         oh = container_of0(handle, struct osd_thandle, ot_super);
3480         LASSERT(oh->ot_handle == NULL);
3481
3482         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3483                              osd_dto_credits_noquota[DTO_INDEX_DELETE]);
3484
3485         return 0;
3486 }
3487
3488 /**
3489  *      delete a (key, value) pair from index \a dt specified by \a key
3490  *
3491  *      \param  dt      osd index object
3492  *      \param  key     key for index
3493  *      \param  rec     record reference
3494  *      \param  handle  transaction handler
3495  *
3496  *      \retval  0  success
3497  *      \retval -ve   failure
3498  */
3499
3500 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
3501                                 const struct dt_key *key,
3502                                 struct thandle *handle,
3503                                 struct lustre_capa *capa)
3504 {
3505         struct osd_thread_info *oti = osd_oti_get(env);
3506         struct osd_object      *obj = osd_dt_obj(dt);
3507         struct osd_thandle     *oh;
3508         struct iam_path_descr  *ipd;
3509         struct iam_container   *bag = &obj->oo_dir->od_container;
3510         int                     rc;
3511
3512         ENTRY;
3513
3514         LINVRNT(osd_invariant(obj));
3515         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3516         LASSERT(bag->ic_object == obj->oo_inode);
3517         LASSERT(handle != NULL);
3518
3519         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
3520                 RETURN(-EACCES);
3521
3522         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
3523
3524         ipd = osd_idx_ipd_get(env, bag);
3525         if (unlikely(ipd == NULL))
3526                 RETURN(-ENOMEM);
3527
3528         oh = container_of0(handle, struct osd_thandle, ot_super);
3529         LASSERT(oh->ot_handle != NULL);
3530         LASSERT(oh->ot_handle->h_transaction != NULL);
3531
3532         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
3533                 /* swab quota uid/gid provided by caller */
3534                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
3535                 key = (const struct dt_key *)&oti->oti_quota_id;
3536         }
3537
3538         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
3539         osd_ipd_put(env, bag, ipd);
3540         LINVRNT(osd_invariant(obj));
3541         RETURN(rc);
3542 }
3543
3544 static int osd_index_declare_ea_delete(const struct lu_env *env,
3545                                        struct dt_object *dt,
3546                                        const struct dt_key *key,
3547                                        struct thandle *handle)
3548 {
3549         struct osd_thandle *oh;
3550         struct inode       *inode;
3551         int                 rc;
3552         ENTRY;
3553
3554         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3555         LASSERT(handle != NULL);
3556
3557         oh = container_of0(handle, struct osd_thandle, ot_super);
3558         LASSERT(oh->ot_handle == NULL);
3559
3560         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3561                              osd_dto_credits_noquota[DTO_INDEX_DELETE]);
3562
3563         inode = osd_dt_obj(dt)->oo_inode;
3564         LASSERT(inode);
3565
3566         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3567                                    0, oh, osd_dt_obj(dt), true, NULL, false);
3568         RETURN(rc);
3569 }
3570
3571 static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
3572                                           struct dt_rec *fid)
3573 {
3574         struct osd_fid_pack *rec;
3575         int                  rc = -ENODATA;
3576
3577         if (de->file_type & LDISKFS_DIRENT_LUFID) {
3578                 rec = (struct osd_fid_pack *) (de->name + de->name_len + 1);
3579                 rc = osd_fid_unpack((struct lu_fid *)fid, rec);
3580         }
3581         return rc;
3582 }
3583
3584 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
3585                           const struct lu_fid *fid)
3586 {
3587         struct seq_server_site  *ss = osd_seq_site(osd);
3588         ENTRY;
3589
3590         /* FID seqs not in FLDB, must be local seq */
3591         if (unlikely(!fid_seq_in_fldb(fid_seq(fid))))
3592                 RETURN(0);
3593
3594         /* If FLD is not being initialized yet, it only happens during the
3595          * initialization, likely during mgs initialization, and we assume
3596          * this is local FID. */
3597         if (ss == NULL || ss->ss_server_fld == NULL)
3598                 RETURN(0);
3599
3600         /* Only check the local FLDB here */
3601         if (osd_seq_exists(env, osd, fid_seq(fid)))
3602                 RETURN(0);
3603
3604         RETURN(1);
3605 }
3606
3607 /**
3608  * Index delete function for interoperability mode (b11826).
3609  * It will remove the directory entry added by osd_index_ea_insert().
3610  * This entry is needed to maintain name->fid mapping.
3611  *
3612  * \param key,  key i.e. file entry to be deleted
3613  *
3614  * \retval   0, on success
3615  * \retval -ve, on error
3616  */
3617 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
3618                                const struct dt_key *key,
3619                                struct thandle *handle,
3620                                struct lustre_capa *capa)
3621 {
3622         struct osd_object          *obj    = osd_dt_obj(dt);
3623         struct inode               *dir    = obj->oo_inode;
3624         struct dentry              *dentry;
3625         struct osd_thandle         *oh;
3626         struct ldiskfs_dir_entry_2 *de = NULL;
3627         struct buffer_head         *bh;
3628         struct htree_lock          *hlock = NULL;
3629         struct lu_fid              *fid = &osd_oti_get(env)->oti_fid;
3630         struct osd_device          *osd = osd_dev(dt->do_lu.lo_dev);
3631         int                        rc;
3632         ENTRY;
3633
3634         LINVRNT(osd_invariant(obj));
3635         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3636         LASSERT(handle != NULL);
3637
3638         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
3639
3640         oh = container_of(handle, struct osd_thandle, ot_super);
3641         LASSERT(oh->ot_handle != NULL);
3642         LASSERT(oh->ot_handle->h_transaction != NULL);
3643
3644         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
3645                 RETURN(-EACCES);
3646
3647         ll_vfs_dq_init(dir);
3648         dentry = osd_child_dentry_get(env, obj,
3649                                       (char *)key, strlen((char *)key));
3650
3651         if (obj->oo_hl_head != NULL) {
3652                 hlock = osd_oti_get(env)->oti_hlock;
3653                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
3654                                    dir, LDISKFS_HLOCK_DEL);
3655         } else {
3656                 down_write(&obj->oo_ext_idx_sem);
3657         }
3658
3659         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
3660         if (bh) {
3661                 __u32 ino = 0;
3662
3663                 /* If this is not the ".." ent