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LU-4482 grant: don't use cache data in osd_statfs()
[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_MDS
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 int ldiskfs_pdo = 1;
76 CFS_MODULE_PARM(ldiskfs_pdo, "i", int, 0644,
77                 "ldiskfs with parallel directory operations");
78
79 int ldiskfs_track_declares_assert;
80 CFS_MODULE_PARM(ldiskfs_track_declares_assert, "i", int, 0644,
81                 "LBUG during tracking of declares");
82
83 /* Slab to allocate dynlocks */
84 struct kmem_cache *dynlock_cachep;
85
86 static struct lu_kmem_descr ldiskfs_caches[] = {
87         {
88                 .ckd_cache = &dynlock_cachep,
89                 .ckd_name  = "dynlock_cache",
90                 .ckd_size  = sizeof(struct dynlock_handle)
91         },
92         {
93                 .ckd_cache = NULL
94         }
95 };
96
97 static const char dot[] = ".";
98 static const char dotdot[] = "..";
99 static const char remote_obj_dir[] = "REM_OBJ_DIR";
100
101 static const struct lu_object_operations      osd_lu_obj_ops;
102 static const struct dt_object_operations      osd_obj_ops;
103 static const struct dt_object_operations      osd_obj_ea_ops;
104 static const struct dt_object_operations      osd_obj_otable_it_ops;
105 static const struct dt_index_operations       osd_index_iam_ops;
106 static const struct dt_index_operations       osd_index_ea_ops;
107
108 int osd_trans_declare_op2rb[] = {
109         [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
110         [OSD_OT_PUNCH]          = OSD_OT_MAX,
111         [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
112         [OSD_OT_CREATE]         = OSD_OT_DESTROY,
113         [OSD_OT_DESTROY]        = OSD_OT_CREATE,
114         [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
115         [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
116         [OSD_OT_WRITE]          = OSD_OT_WRITE,
117         [OSD_OT_INSERT]         = OSD_OT_DELETE,
118         [OSD_OT_DELETE]         = OSD_OT_INSERT,
119         [OSD_OT_UPDATE]         = OSD_OT_MAX,
120         [OSD_OT_QUOTA]          = OSD_OT_MAX,
121 };
122
123 static int osd_has_index(const struct osd_object *obj)
124 {
125         return obj->oo_dt.do_index_ops != NULL;
126 }
127
128 static int osd_object_invariant(const struct lu_object *l)
129 {
130         return osd_invariant(osd_obj(l));
131 }
132
133 /*
134  * Concurrency: doesn't matter
135  */
136 static int osd_read_locked(const struct lu_env *env, struct osd_object *o)
137 {
138         return osd_oti_get(env)->oti_r_locks > 0;
139 }
140
141 /*
142  * Concurrency: doesn't matter
143  */
144 static int osd_write_locked(const struct lu_env *env, struct osd_object *o)
145 {
146         struct osd_thread_info *oti = osd_oti_get(env);
147         return oti->oti_w_locks > 0 && o->oo_owner == env;
148 }
149
150 /*
151  * Concurrency: doesn't access mutable data
152  */
153 static int osd_root_get(const struct lu_env *env,
154                         struct dt_device *dev, struct lu_fid *f)
155 {
156         lu_local_obj_fid(f, OSD_FS_ROOT_OID);
157         return 0;
158 }
159
160 /*
161  * OSD object methods.
162  */
163
164 /*
165  * Concurrency: no concurrent access is possible that early in object
166  * life-cycle.
167  */
168 static struct lu_object *osd_object_alloc(const struct lu_env *env,
169                                           const struct lu_object_header *hdr,
170                                           struct lu_device *d)
171 {
172         struct osd_object *mo;
173
174         OBD_ALLOC_PTR(mo);
175         if (mo != NULL) {
176                 struct lu_object *l;
177
178                 l = &mo->oo_dt.do_lu;
179                 dt_object_init(&mo->oo_dt, NULL, d);
180                 mo->oo_dt.do_ops = &osd_obj_ea_ops;
181                 l->lo_ops = &osd_lu_obj_ops;
182                 init_rwsem(&mo->oo_sem);
183                 init_rwsem(&mo->oo_ext_idx_sem);
184                 spin_lock_init(&mo->oo_guard);
185                 return l;
186         } else {
187                 return NULL;
188         }
189 }
190
191 int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
192                 struct dentry *dentry, struct lustre_mdt_attrs *lma)
193 {
194         int rc;
195
196         CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
197         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
198                              info->oti_mdt_attrs_old, LMA_OLD_SIZE);
199         if (rc > 0) {
200                 if ((void *)lma != (void *)info->oti_mdt_attrs_old)
201                         memcpy(lma, info->oti_mdt_attrs_old, sizeof(*lma));
202                 rc = 0;
203                 lustre_lma_swab(lma);
204                 /* Check LMA compatibility */
205                 if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
206                         CWARN("%.16s: unsupported incompat LMA feature(s) %#x "
207                               "for fid = "DFID", ino = %lu\n",
208                               LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
209                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
210                               PFID(&lma->lma_self_fid), inode->i_ino);
211                         rc = -EOPNOTSUPP;
212                 }
213         } else if (rc == 0) {
214                 rc = -ENODATA;
215         }
216
217         return rc;
218 }
219
220 /*
221  * retrieve object from backend ext fs.
222  **/
223 struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
224                        struct osd_inode_id *id)
225 {
226         struct inode *inode = NULL;
227
228         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
229         if (IS_ERR(inode)) {
230                 CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
231                        id->oii_ino, PTR_ERR(inode));
232         } else if (id->oii_gen != OSD_OII_NOGEN &&
233                    inode->i_generation != id->oii_gen) {
234                 CDEBUG(D_INODE, "unmatched inode: ino = %u, oii_gen = %u, "
235                        "i_generation = %u\n",
236                        id->oii_ino, id->oii_gen, inode->i_generation);
237                 iput(inode);
238                 inode = ERR_PTR(-ESTALE);
239         } else if (inode->i_nlink == 0) {
240                 /* due to parallel readdir and unlink,
241                 * we can have dead inode here. */
242                 CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
243                 iput(inode);
244                 inode = ERR_PTR(-ESTALE);
245         } else if (is_bad_inode(inode)) {
246                 CWARN("%.16s: bad inode: ino = %u\n",
247                 LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name, id->oii_ino);
248                 iput(inode);
249                 inode = ERR_PTR(-ENOENT);
250         } else {
251                 if (id->oii_gen == OSD_OII_NOGEN)
252                         osd_id_gen(id, inode->i_ino, inode->i_generation);
253
254                 /* Do not update file c/mtime in ldiskfs.
255                  * NB: we don't have any lock to protect this because we don't
256                  * have reference on osd_object now, but contention with
257                  * another lookup + attr_set can't happen in the tiny window
258                  * between if (...) and set S_NOCMTIME. */
259                 if (!(inode->i_flags & S_NOCMTIME))
260                         inode->i_flags |= S_NOCMTIME;
261         }
262         return inode;
263 }
264
265 static struct inode *
266 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
267              struct osd_inode_id *id, struct lu_fid *fid)
268 {
269         struct lustre_mdt_attrs *lma   = &info->oti_mdt_attrs;
270         struct inode            *inode;
271         int                      rc;
272
273         inode = osd_iget(info, dev, id);
274         if (IS_ERR(inode))
275                 return inode;
276
277         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
278         if (rc == 0) {
279                 *fid = lma->lma_self_fid;
280         } else if (rc == -ENODATA) {
281                 if (unlikely(inode == osd_sb(dev)->s_root->d_inode))
282                         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
283                 else
284                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
285         } else {
286                 iput(inode);
287                 inode = ERR_PTR(rc);
288         }
289         return inode;
290 }
291
292 static struct inode *osd_iget_check(struct osd_thread_info *info,
293                                     struct osd_device *dev,
294                                     const struct lu_fid *fid,
295                                     struct osd_inode_id *id,
296                                     bool in_oi)
297 {
298         struct inode    *inode;
299         int              rc     = 0;
300         ENTRY;
301
302         inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
303         if (IS_ERR(inode)) {
304                 rc = PTR_ERR(inode);
305                 if (!in_oi || (rc != -ENOENT && rc != -ESTALE)) {
306                         CDEBUG(D_INODE, "no inode: ino = %u, rc = %d\n",
307                                id->oii_ino, rc);
308
309                         GOTO(put, rc);
310                 }
311
312                 goto check_oi;
313         }
314
315         if (is_bad_inode(inode)) {
316                 rc = -ENOENT;
317                 if (!in_oi) {
318                         CDEBUG(D_INODE, "bad inode: ino = %u\n", id->oii_ino);
319
320                         GOTO(put, rc);
321                 }
322
323                 goto check_oi;
324         }
325
326         if (id->oii_gen != OSD_OII_NOGEN &&
327             inode->i_generation != id->oii_gen) {
328                 rc = -ESTALE;
329                 if (!in_oi) {
330                         CDEBUG(D_INODE, "unmatched inode: ino = %u, "
331                                "oii_gen = %u, i_generation = %u\n",
332                                id->oii_ino, id->oii_gen, inode->i_generation);
333
334                         GOTO(put, rc);
335                 }
336
337                 goto check_oi;
338         }
339
340         if (inode->i_nlink == 0) {
341                 rc = -ENOENT;
342                 if (!in_oi) {
343                         CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
344
345                         GOTO(put, rc);
346                 }
347
348                 goto check_oi;
349         }
350
351 check_oi:
352         if (rc != 0) {
353                 LASSERTF(rc == -ESTALE || rc == -ENOENT, "rc = %d\n", rc);
354
355                 rc = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
356                 /* XXX: There are some possible cases:
357                  *      1. rc = 0.
358                  *         Backup/restore caused the OI invalid.
359                  *      2. rc = 0.
360                  *         Someone unlinked the object but NOT removed
361                  *         the OI mapping, such as mount target device
362                  *         as ldiskfs, and modify something directly.
363                  *      3. rc = -ENOENT.
364                  *         Someone just removed the object between the
365                  *         former oi_lookup and the iget. It is normal.
366                  *      4. Other failure cases.
367                  *
368                  *      Generally, when the device is mounted, it will
369                  *      auto check whether the system is restored from
370                  *      file-level backup or not. We trust such detect
371                  *      to distinguish the 1st case from the 2nd case. */
372                 if (rc == 0) {
373                         if (!IS_ERR(inode) && inode->i_generation != 0 &&
374                             inode->i_generation == id->oii_gen)
375                                 rc = -ENOENT;
376                         else
377                                 rc = -EREMCHG;
378                 }
379         } else {
380                 if (id->oii_gen == OSD_OII_NOGEN)
381                         osd_id_gen(id, inode->i_ino, inode->i_generation);
382
383                 /* Do not update file c/mtime in ldiskfs.
384                  * NB: we don't have any lock to protect this because we don't
385                  * have reference on osd_object now, but contention with
386                  * another lookup + attr_set can't happen in the tiny window
387                  * between if (...) and set S_NOCMTIME. */
388                 if (!(inode->i_flags & S_NOCMTIME))
389                         inode->i_flags |= S_NOCMTIME;
390         }
391
392         GOTO(put, rc);
393
394 put:
395         if (rc != 0) {
396                 if (!IS_ERR(inode))
397                         iput(inode);
398
399                 inode = ERR_PTR(rc);
400         }
401
402         return inode;
403 }
404
405 /**
406  * \retval +v: new filter_fid, does not contain self-fid
407  * \retval 0:  filter_fid_old, contains self-fid
408  * \retval -v: other failure cases
409  */
410 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
411                  struct dentry *dentry, struct lu_fid *fid)
412 {
413         struct filter_fid_old   *ff     = &info->oti_ff;
414         struct ost_id           *ostid  = &info->oti_ostid;
415         int                      rc;
416
417         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
418         if (rc == sizeof(*ff)) {
419                 rc = 0;
420                 ostid_set_seq(ostid, le64_to_cpu(ff->ff_seq));
421                 ostid_set_id(ostid, le64_to_cpu(ff->ff_objid));
422                 /* XXX: should use real OST index in the future. LU-3569 */
423                 ostid_to_fid(fid, ostid, 0);
424         } else if (rc == sizeof(struct filter_fid)) {
425                 rc = 1;
426         } else if (rc >= 0) {
427                 rc = -EINVAL;
428         }
429
430         return rc;
431 }
432
433 static int osd_lma_self_repair(struct osd_thread_info *info,
434                                struct osd_device *osd, struct inode *inode,
435                                const struct lu_fid *fid, __u32 compat)
436 {
437         handle_t *jh;
438         int       rc;
439
440         LASSERT(current->journal_info == NULL);
441
442         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
443                                   osd_dto_credits_noquota[DTO_XATTR_SET]);
444         if (IS_ERR(jh)) {
445                 rc = PTR_ERR(jh);
446                 CWARN("%s: cannot start journal for lma_self_repair: rc = %d\n",
447                       osd_name(osd), rc);
448                 return rc;
449         }
450
451         rc = osd_ea_fid_set(info, inode, fid, compat, 0);
452         if (rc != 0)
453                 CWARN("%s: cannot self repair the LMA: rc = %d\n",
454                       osd_name(osd), rc);
455         ldiskfs_journal_stop(jh);
456         return rc;
457 }
458
459 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
460 {
461         struct osd_thread_info  *info   = osd_oti_get(env);
462         struct osd_device       *osd    = osd_obj2dev(obj);
463         struct lustre_mdt_attrs *lma    = &info->oti_mdt_attrs;
464         struct inode            *inode  = obj->oo_inode;
465         struct dentry           *dentry = &info->oti_obj_dentry;
466         struct lu_fid           *fid    = NULL;
467         const struct lu_fid     *rfid   = lu_object_fid(&obj->oo_dt.do_lu);
468         int                      rc;
469         ENTRY;
470
471         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_COMPAT_INVALID_ENTRY))
472                 RETURN(0);
473
474         CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
475         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
476                              info->oti_mdt_attrs_old, LMA_OLD_SIZE);
477         if (rc == -ENODATA && !fid_is_igif(rfid) && osd->od_check_ff) {
478                 fid = &lma->lma_self_fid;
479                 rc = osd_get_idif(info, inode, dentry, fid);
480                 if ((rc > 0) || (rc == -ENODATA && osd->od_lma_self_repair)) {
481                         /* For the given OST-object, if it has neither LMA nor
482                          * FID in XATTR_NAME_FID, then the given FID (which is
483                          * contained in the @obj, from client RPC for locating
484                          * the OST-object) is trusted. We use it to generate
485                          * the LMA. */
486                         osd_lma_self_repair(info, osd, inode, rfid,
487                                 fid_is_on_ost(info, osd, fid, OI_CHECK_FLD) ?
488                                 LMAC_FID_ON_OST : 0);
489                         RETURN(0);
490                 }
491         }
492
493         if (unlikely(rc == -ENODATA))
494                 RETURN(0);
495
496         if (rc < 0)
497                 RETURN(rc);
498
499         if (rc > 0) {
500                 rc = 0;
501                 lustre_lma_swab(lma);
502                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
503                              CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT))) {
504                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
505                               "fid = "DFID", ino = %lu\n", osd_name(osd),
506                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
507                               PFID(rfid), inode->i_ino);
508                         rc = -EOPNOTSUPP;
509                 } else if (!(lma->lma_compat & LMAC_NOT_IN_OI)) {
510                         fid = &lma->lma_self_fid;
511                 }
512         }
513
514         if (fid != NULL && unlikely(!lu_fid_eq(rfid, fid))) {
515                 if (fid_is_idif(rfid) && fid_is_idif(fid)) {
516                         struct ost_id   *oi   = &info->oti_ostid;
517                         struct lu_fid   *fid1 = &info->oti_fid3;
518                         __u32            idx  = fid_idif_ost_idx(rfid);
519
520                         /* For old IDIF, the OST index is not part of the IDIF,
521                          * Means that different OSTs may have the same IDIFs.
522                          * Under such case, we need to make some compatible
523                          * check to make sure to trigger OI scrub properly. */
524                         if (idx != 0 && fid_idif_ost_idx(fid) == 0) {
525                                 /* Given @rfid is new, LMA is old. */
526                                 fid_to_ostid(fid, oi);
527                                 ostid_to_fid(fid1, oi, idx);
528                                 if (lu_fid_eq(fid1, rfid)) {
529                                         if (osd->od_lma_self_repair)
530                                                 osd_lma_self_repair(info, osd,
531                                                         inode, rfid,
532                                                         LMAC_FID_ON_OST);
533                                         RETURN(0);
534                                 }
535                         }
536                 }
537
538                 CDEBUG(D_INODE, "%s: FID "DFID" != self_fid "DFID"\n",
539                        osd_name(osd), PFID(rfid), PFID(fid));
540                 rc = -EREMCHG;
541         }
542
543         RETURN(rc);
544 }
545
546 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
547                           const struct lu_fid *fid,
548                           const struct lu_object_conf *conf)
549 {
550         struct osd_thread_info *info;
551         struct lu_device       *ldev   = obj->oo_dt.do_lu.lo_dev;
552         struct osd_device      *dev;
553         struct osd_idmap_cache *oic;
554         struct osd_inode_id    *id;
555         struct inode           *inode;
556         struct osd_scrub       *scrub;
557         struct scrub_file      *sf;
558         int                     result;
559         int                     saved  = 0;
560         bool                    in_oi  = false;
561         bool                    triggered = false;
562         ENTRY;
563
564         LINVRNT(osd_invariant(obj));
565         LASSERT(obj->oo_inode == NULL);
566         LASSERTF(fid_is_sane(fid) || fid_is_idif(fid), DFID, PFID(fid));
567
568         dev = osd_dev(ldev);
569         scrub = &dev->od_scrub;
570         sf = &scrub->os_file;
571         info = osd_oti_get(env);
572         LASSERT(info);
573         oic = &info->oti_cache;
574
575         if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
576                 RETURN(-ENOENT);
577
578         /* For the object is created as locking anchor, or for the object to
579          * be created on disk. No need to osd_oi_lookup() at here because FID
580          * shouldn't never be re-used, if it's really a duplicate FID from
581          * unexpected reason, we should be able to detect it later by calling
582          * do_create->osd_oi_insert(). */
583         if (conf != NULL && conf->loc_flags & LOC_F_NEW)
584                 GOTO(out, result = 0);
585
586         /* Search order: 1. per-thread cache. */
587         if (lu_fid_eq(fid, &oic->oic_fid) &&
588             likely(oic->oic_dev == dev)) {
589                 id = &oic->oic_lid;
590                 goto iget;
591         }
592
593         id = &info->oti_id;
594         if (!cfs_list_empty(&scrub->os_inconsistent_items)) {
595                 /* Search order: 2. OI scrub pending list. */
596                 result = osd_oii_lookup(dev, fid, id);
597                 if (result == 0)
598                         goto iget;
599         }
600
601         /* Search order: 3. OI files. */
602         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
603         if (result == -ENOENT) {
604                 if (!fid_is_norm(fid) ||
605                     fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
606                     !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
607                                       sf->sf_oi_bitmap))
608                         GOTO(out, result = 0);
609
610                 goto trigger;
611         }
612
613         if (result != 0)
614                 GOTO(out, result);
615
616         in_oi = true;
617
618 iget:
619         inode = osd_iget_check(info, dev, fid, id, in_oi);
620         if (IS_ERR(inode)) {
621                 result = PTR_ERR(inode);
622                 if (result == -ENOENT || result == -ESTALE) {
623                         if (!in_oi)
624                                 fid_zero(&oic->oic_fid);
625
626                         GOTO(out, result = -ENOENT);
627                 } else if (result == -EREMCHG) {
628
629 trigger:
630                         if (!in_oi)
631                                 fid_zero(&oic->oic_fid);
632
633                         if (unlikely(triggered))
634                                 GOTO(out, result = saved);
635
636                         triggered = true;
637                         if (thread_is_running(&scrub->os_thread)) {
638                                 result = -EINPROGRESS;
639                         } else if (!dev->od_noscrub) {
640                                 result = osd_scrub_start(dev);
641                                 LCONSOLE_WARN("%.16s: trigger OI scrub by RPC "
642                                               "for "DFID", rc = %d [1]\n",
643                                               osd_name(dev), PFID(fid),result);
644                                 if (result == 0 || result == -EALREADY)
645                                         result = -EINPROGRESS;
646                                 else
647                                         result = -EREMCHG;
648                         }
649
650                         /* We still have chance to get the valid inode: for the
651                          * object which is referenced by remote name entry, the
652                          * object on the local MDT will be linked under the dir
653                          * of "/REMOTE_PARENT_DIR" with its FID string as name.
654                          *
655                          * We do not know whether the object for the given FID
656                          * is referenced by some remote name entry or not, and
657                          * especially for DNE II, a multiple-linked object may
658                          * have many name entries reside on many MDTs.
659                          *
660                          * To simplify the operation, OSD will not distinguish
661                          * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
662                          * only happened for the RPC from other MDT during the
663                          * OI scrub, or for the client side RPC with FID only,
664                          * such as FID to path, or from old connected client. */
665                         saved = result;
666                         result = osd_lookup_in_remote_parent(info, dev,
667                                                              fid, id);
668                         if (result == 0) {
669                                 in_oi = false;
670                                 goto iget;
671                         }
672
673                         result = saved;
674                 }
675
676                 GOTO(out, result);
677         }
678
679         obj->oo_inode = inode;
680         LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
681
682         result = osd_check_lma(env, obj);
683         if (result != 0) {
684                 iput(inode);
685                 obj->oo_inode = NULL;
686                 if (result == -EREMCHG) {
687                         if (!in_oi) {
688                                 result = osd_oi_lookup(info, dev, fid, id,
689                                                        OI_CHECK_FLD);
690                                 if (result != 0) {
691                                         fid_zero(&oic->oic_fid);
692                                         GOTO(out, result);
693                                 }
694                         }
695
696                         goto trigger;
697                 }
698
699                 GOTO(out, result);
700         }
701
702         obj->oo_compat_dot_created = 1;
703         obj->oo_compat_dotdot_created = 1;
704
705         if (!S_ISDIR(inode->i_mode) || !ldiskfs_pdo) /* done */
706                 GOTO(out, result = 0);
707
708         LASSERT(obj->oo_hl_head == NULL);
709         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
710         if (obj->oo_hl_head == NULL) {
711                 obj->oo_inode = NULL;
712                 iput(inode);
713                 GOTO(out, result = -ENOMEM);
714         }
715         GOTO(out, result = 0);
716
717 out:
718         LINVRNT(osd_invariant(obj));
719         return result;
720 }
721
722 /*
723  * Concurrency: shouldn't matter.
724  */
725 static void osd_object_init0(struct osd_object *obj)
726 {
727         LASSERT(obj->oo_inode != NULL);
728         obj->oo_dt.do_body_ops = &osd_body_ops;
729         obj->oo_dt.do_lu.lo_header->loh_attr |=
730                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
731 }
732
733 /*
734  * Concurrency: no concurrent access is possible that early in object
735  * life-cycle.
736  */
737 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
738                            const struct lu_object_conf *conf)
739 {
740         struct osd_object *obj = osd_obj(l);
741         int result;
742
743         LINVRNT(osd_invariant(obj));
744
745         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
746                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
747                 l->lo_header->loh_attr |= LOHA_EXISTS;
748                 return 0;
749         }
750
751         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
752         obj->oo_dt.do_body_ops = &osd_body_ops_new;
753         if (result == 0 && obj->oo_inode != NULL)
754                 osd_object_init0(obj);
755
756         LINVRNT(osd_invariant(obj));
757         return result;
758 }
759
760 /*
761  * Concurrency: no concurrent access is possible that late in object
762  * life-cycle.
763  */
764 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
765 {
766         struct osd_object *obj = osd_obj(l);
767
768         LINVRNT(osd_invariant(obj));
769
770         dt_object_fini(&obj->oo_dt);
771         if (obj->oo_hl_head != NULL)
772                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
773         OBD_FREE_PTR(obj);
774 }
775
776 /*
777  * Concurrency: no concurrent access is possible that late in object
778  * life-cycle.
779  */
780 static void osd_index_fini(struct osd_object *o)
781 {
782         struct iam_container *bag;
783
784         if (o->oo_dir != NULL) {
785                 bag = &o->oo_dir->od_container;
786                 if (o->oo_inode != NULL) {
787                         if (bag->ic_object == o->oo_inode)
788                                 iam_container_fini(bag);
789                 }
790                 OBD_FREE_PTR(o->oo_dir);
791                 o->oo_dir = NULL;
792         }
793 }
794
795 /*
796  * Concurrency: no concurrent access is possible that late in object
797  * life-cycle (for all existing callers, that is. New callers have to provide
798  * their own locking.)
799  */
800 static int osd_inode_unlinked(const struct inode *inode)
801 {
802         return inode->i_nlink == 0;
803 }
804
805 enum {
806         OSD_TXN_OI_DELETE_CREDITS    = 20,
807         OSD_TXN_INODE_DELETE_CREDITS = 20
808 };
809
810 /*
811  * Journal
812  */
813
814 #if OSD_THANDLE_STATS
815 /**
816  * Set time when the handle is allocated
817  */
818 static void osd_th_alloced(struct osd_thandle *oth)
819 {
820         oth->oth_alloced = cfs_time_current();
821 }
822
823 /**
824  * Set time when the handle started
825  */
826 static void osd_th_started(struct osd_thandle *oth)
827 {
828         oth->oth_started = cfs_time_current();
829 }
830
831 /**
832  * Helper function to convert time interval to microseconds packed in
833  * long int.
834  */
835 static long interval_to_usec(cfs_time_t start, cfs_time_t end)
836 {
837         struct timeval val;
838
839         cfs_duration_usec(cfs_time_sub(end, start), &val);
840         return val.tv_sec * 1000000 + val.tv_usec;
841 }
842
843 /**
844  * Check whether the we deal with this handle for too long.
845  */
846 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
847                                 cfs_time_t alloced, cfs_time_t started,
848                                 cfs_time_t closed)
849 {
850         cfs_time_t now = cfs_time_current();
851
852         LASSERT(dev != NULL);
853
854         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
855                             interval_to_usec(alloced, started));
856         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
857                             interval_to_usec(started, closed));
858         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
859                             interval_to_usec(closed, now));
860
861         if (cfs_time_before(cfs_time_add(alloced, cfs_time_seconds(30)), now)) {
862                 CWARN("transaction handle %p was open for too long: "
863                       "now "CFS_TIME_T" ,"
864                       "alloced "CFS_TIME_T" ,"
865                       "started "CFS_TIME_T" ,"
866                       "closed "CFS_TIME_T"\n",
867                       oth, now, alloced, started, closed);
868                 libcfs_debug_dumpstack(NULL);
869         }
870 }
871
872 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
873 {                                                                       \
874         cfs_time_t __closed = cfs_time_current();                       \
875         cfs_time_t __alloced = oth->oth_alloced;                        \
876         cfs_time_t __started = oth->oth_started;                        \
877                                                                         \
878         expr;                                                           \
879         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
880 }
881
882 #else /* OSD_THANDLE_STATS */
883
884 #define osd_th_alloced(h)                  do {} while(0)
885 #define osd_th_started(h)                  do {} while(0)
886 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
887
888 #endif /* OSD_THANDLE_STATS */
889
890 /*
891  * Concurrency: doesn't access mutable data.
892  */
893 static int osd_param_is_not_sane(const struct osd_device *dev,
894                                  const struct thandle *th)
895 {
896         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
897
898         return oh->ot_credits > osd_journal(dev)->j_max_transaction_buffers;
899 }
900
901 /*
902  * Concurrency: shouldn't matter.
903  */
904 static void osd_trans_commit_cb(struct super_block *sb,
905                                 struct ldiskfs_journal_cb_entry *jcb, int error)
906 {
907         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
908         struct thandle     *th  = &oh->ot_super;
909         struct lu_device   *lud = &th->th_dev->dd_lu_dev;
910         struct dt_txn_commit_cb *dcb, *tmp;
911
912         LASSERT(oh->ot_handle == NULL);
913
914         if (error)
915                 CERROR("transaction @0x%p commit error: %d\n", th, error);
916
917         dt_txn_hook_commit(th);
918
919         /* call per-transaction callbacks if any */
920         cfs_list_for_each_entry_safe(dcb, tmp, &oh->ot_dcb_list, dcb_linkage) {
921                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
922                          "commit callback entry: magic=%x name='%s'\n",
923                          dcb->dcb_magic, dcb->dcb_name);
924                 cfs_list_del_init(&dcb->dcb_linkage);
925                 dcb->dcb_func(NULL, th, dcb, error);
926         }
927
928         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
929         lu_device_put(lud);
930         th->th_dev = NULL;
931
932         lu_context_exit(&th->th_ctx);
933         lu_context_fini(&th->th_ctx);
934         thandle_put(th);
935 }
936
937 static struct thandle *osd_trans_create(const struct lu_env *env,
938                                         struct dt_device *d)
939 {
940         struct osd_thread_info  *oti = osd_oti_get(env);
941         struct osd_iobuf        *iobuf = &oti->oti_iobuf;
942         struct osd_thandle      *oh;
943         struct thandle          *th;
944         ENTRY;
945
946         /* on pending IO in this thread should left from prev. request */
947         LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
948
949         th = ERR_PTR(-ENOMEM);
950         OBD_ALLOC_GFP(oh, sizeof *oh, __GFP_IO);
951         if (oh != NULL) {
952                 oh->ot_quota_trans = &oti->oti_quota_trans;
953                 memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
954                 th = &oh->ot_super;
955                 th->th_dev = d;
956                 th->th_result = 0;
957                 th->th_tags = LCT_TX_HANDLE;
958                 oh->ot_credits = 0;
959                 atomic_set(&th->th_refc, 1);
960                 th->th_alloc_size = sizeof(*oh);
961                 oti->oti_dev = osd_dt_dev(d);
962                 CFS_INIT_LIST_HEAD(&oh->ot_dcb_list);
963                 osd_th_alloced(oh);
964
965                 memset(oti->oti_declare_ops, 0,
966                                         sizeof(oti->oti_declare_ops));
967                 memset(oti->oti_declare_ops_rb, 0,
968                                         sizeof(oti->oti_declare_ops_rb));
969                 memset(oti->oti_declare_ops_cred, 0,
970                                         sizeof(oti->oti_declare_ops_cred));
971                 oti->oti_rollback = false;
972         }
973         RETURN(th);
974 }
975
976 /*
977  * Concurrency: shouldn't matter.
978  */
979 int osd_trans_start(const struct lu_env *env, struct dt_device *d,
980                     struct thandle *th)
981 {
982         struct osd_thread_info *oti = osd_oti_get(env);
983         struct osd_device  *dev = osd_dt_dev(d);
984         handle_t           *jh;
985         struct osd_thandle *oh;
986         int rc;
987
988         ENTRY;
989
990         LASSERT(current->journal_info == NULL);
991
992         oh = container_of0(th, struct osd_thandle, ot_super);
993         LASSERT(oh != NULL);
994         LASSERT(oh->ot_handle == NULL);
995
996         rc = dt_txn_hook_start(env, d, th);
997         if (rc != 0)
998                 GOTO(out, rc);
999
1000         if (unlikely(osd_param_is_not_sane(dev, th))) {
1001                 static unsigned long last_printed;
1002                 static int last_credits;
1003
1004                 CWARN("%.16s: too many transaction credits (%d > %d)\n",
1005                       LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
1006                       oh->ot_credits,
1007                       osd_journal(dev)->j_max_transaction_buffers);
1008                 CWARN("  create: %u/%u, delete: %u/%u, destroy: %u/%u\n",
1009                       oti->oti_declare_ops[OSD_OT_CREATE],
1010                       oti->oti_declare_ops_cred[OSD_OT_CREATE],
1011                       oti->oti_declare_ops[OSD_OT_DELETE],
1012                       oti->oti_declare_ops_cred[OSD_OT_DELETE],
1013                       oti->oti_declare_ops[OSD_OT_DESTROY],
1014                       oti->oti_declare_ops_cred[OSD_OT_DESTROY]);
1015                 CWARN("  attr_set: %u/%u, xattr_set: %u/%u\n",
1016                       oti->oti_declare_ops[OSD_OT_ATTR_SET],
1017                       oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
1018                       oti->oti_declare_ops[OSD_OT_XATTR_SET],
1019                       oti->oti_declare_ops_cred[OSD_OT_XATTR_SET]);
1020                 CWARN("  write: %u/%u, punch: %u/%u, quota %u/%u\n",
1021                       oti->oti_declare_ops[OSD_OT_WRITE],
1022                       oti->oti_declare_ops_cred[OSD_OT_WRITE],
1023                       oti->oti_declare_ops[OSD_OT_PUNCH],
1024                       oti->oti_declare_ops_cred[OSD_OT_PUNCH],
1025                       oti->oti_declare_ops[OSD_OT_QUOTA],
1026                       oti->oti_declare_ops_cred[OSD_OT_QUOTA]);
1027                 CWARN("  insert: %u/%u, delete: %u/%u\n",
1028                       oti->oti_declare_ops[OSD_OT_INSERT],
1029                       oti->oti_declare_ops_cred[OSD_OT_INSERT],
1030                       oti->oti_declare_ops[OSD_OT_DESTROY],
1031                       oti->oti_declare_ops_cred[OSD_OT_DESTROY]);
1032                 CWARN("  ref_add: %u/%u, ref_del: %u/%u\n",
1033                       oti->oti_declare_ops[OSD_OT_REF_ADD],
1034                       oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
1035                       oti->oti_declare_ops[OSD_OT_REF_DEL],
1036                       oti->oti_declare_ops_cred[OSD_OT_REF_DEL]);
1037
1038                 if (last_credits != oh->ot_credits &&
1039                     time_after(jiffies, last_printed + 60 * HZ)) {
1040                         libcfs_debug_dumpstack(NULL);
1041                         last_credits = oh->ot_credits;
1042                         last_printed = jiffies;
1043                 }
1044                 /* XXX Limit the credits to 'max_transaction_buffers', and
1045                  *     let the underlying filesystem to catch the error if
1046                  *     we really need so many credits.
1047                  *
1048                  *     This should be removed when we can calculate the
1049                  *     credits precisely. */
1050                 oh->ot_credits = osd_journal(dev)->j_max_transaction_buffers;
1051         }
1052
1053         /*
1054          * XXX temporary stuff. Some abstraction layer should
1055          * be used.
1056          */
1057         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
1058         osd_th_started(oh);
1059         if (!IS_ERR(jh)) {
1060                 oh->ot_handle = jh;
1061                 LASSERT(oti->oti_txns == 0);
1062                 lu_context_init(&th->th_ctx, th->th_tags);
1063                 lu_context_enter(&th->th_ctx);
1064
1065                 lu_device_get(&d->dd_lu_dev);
1066                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
1067                               "osd-tx", th);
1068                 oti->oti_txns++;
1069                 rc = 0;
1070         } else {
1071                 rc = PTR_ERR(jh);
1072         }
1073 out:
1074         RETURN(rc);
1075 }
1076
1077 static int osd_seq_exists(const struct lu_env *env,
1078                               struct osd_device *osd, obd_seq seq)
1079 {
1080         struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
1081         struct seq_server_site  *ss = osd_seq_site(osd);
1082         int                     rc;
1083         ENTRY;
1084
1085         if (ss == NULL)
1086                 RETURN(1);
1087
1088         rc = osd_fld_lookup(env, osd, seq, range);
1089         if (rc != 0) {
1090                 if (rc != -ENOENT)
1091                         CERROR("%s: can't lookup FLD sequence "LPX64
1092                                ": rc = %d\n", osd_name(osd), seq, rc);
1093                 RETURN(0);
1094         }
1095
1096         RETURN(ss->ss_node_id == range->lsr_index);
1097 }
1098
1099 /*
1100  * Concurrency: shouldn't matter.
1101  */
1102 static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
1103                           struct thandle *th)
1104 {
1105         int                     rc = 0;
1106         struct osd_thandle     *oh;
1107         struct osd_thread_info *oti = osd_oti_get(env);
1108         struct osd_iobuf       *iobuf = &oti->oti_iobuf;
1109         struct qsd_instance    *qsd = oti->oti_dev->od_quota_slave;
1110         ENTRY;
1111
1112         oh = container_of0(th, struct osd_thandle, ot_super);
1113
1114         if (qsd != NULL)
1115                 /* inform the quota slave device that the transaction is
1116                  * stopping */
1117                 qsd_op_end(env, qsd, oh->ot_quota_trans);
1118         oh->ot_quota_trans = NULL;
1119
1120         if (oh->ot_handle != NULL) {
1121                 handle_t *hdl = oh->ot_handle;
1122
1123                 /*
1124                  * add commit callback
1125                  * notice we don't do this in osd_trans_start()
1126                  * as underlying transaction can change during truncate
1127                  */
1128                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
1129                                          &oh->ot_jcb);
1130
1131                 LASSERT(oti->oti_txns == 1);
1132                 oti->oti_txns--;
1133                 rc = dt_txn_hook_stop(env, th);
1134                 if (rc != 0)
1135                         CERROR("Failure in transaction hook: %d\n", rc);
1136
1137                 /* hook functions might modify th_sync */
1138                 hdl->h_sync = th->th_sync;
1139
1140                 oh->ot_handle = NULL;
1141                 OSD_CHECK_SLOW_TH(oh, oti->oti_dev,
1142                                   rc = ldiskfs_journal_stop(hdl));
1143                 if (rc != 0)
1144                         CERROR("Failure to stop transaction: %d\n", rc);
1145         } else {
1146                 thandle_put(&oh->ot_super);
1147         }
1148
1149         /* as we want IO to journal and data IO be concurrent, we don't block
1150          * awaiting data IO completion in osd_do_bio(), instead we wait here
1151          * once transaction is submitted to the journal. all reqular requests
1152          * don't do direct IO (except read/write), thus this wait_event becomes
1153          * no-op for them.
1154          *
1155          * IMPORTANT: we have to wait till any IO submited by the thread is
1156          * completed otherwise iobuf may be corrupted by different request
1157          */
1158         wait_event(iobuf->dr_wait,
1159                        atomic_read(&iobuf->dr_numreqs) == 0);
1160         if (!rc)
1161                 rc = iobuf->dr_error;
1162
1163         RETURN(rc);
1164 }
1165
1166 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
1167 {
1168         struct osd_thandle *oh = container_of0(th, struct osd_thandle,
1169                                                ot_super);
1170
1171         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
1172         LASSERT(&dcb->dcb_func != NULL);
1173         cfs_list_add(&dcb->dcb_linkage, &oh->ot_dcb_list);
1174
1175         return 0;
1176 }
1177
1178 /*
1179  * Called just before object is freed. Releases all resources except for
1180  * object itself (that is released by osd_object_free()).
1181  *
1182  * Concurrency: no concurrent access is possible that late in object
1183  * life-cycle.
1184  */
1185 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
1186 {
1187         struct osd_object *obj   = osd_obj(l);
1188         struct inode      *inode = obj->oo_inode;
1189
1190         LINVRNT(osd_invariant(obj));
1191
1192         /*
1193          * If object is unlinked remove fid->ino mapping from object index.
1194          */
1195
1196         osd_index_fini(obj);
1197         if (inode != NULL) {
1198                 struct qsd_instance     *qsd = osd_obj2dev(obj)->od_quota_slave;
1199                 qid_t                    uid = inode->i_uid;
1200                 qid_t                    gid = inode->i_gid;
1201
1202                 iput(inode);
1203                 obj->oo_inode = NULL;
1204
1205                 if (qsd != NULL) {
1206                         struct osd_thread_info  *info = osd_oti_get(env);
1207                         struct lquota_id_info   *qi = &info->oti_qi;
1208
1209                         /* Release granted quota to master if necessary */
1210                         qi->lqi_id.qid_uid = uid;
1211                         qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
1212
1213                         qi->lqi_id.qid_uid = gid;
1214                         qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
1215                 }
1216         }
1217 }
1218
1219 /*
1220  * Concurrency: ->loo_object_release() is called under site spin-lock.
1221  */
1222 static void osd_object_release(const struct lu_env *env,
1223                                struct lu_object *l)
1224 {
1225 }
1226
1227 /*
1228  * Concurrency: shouldn't matter.
1229  */
1230 static int osd_object_print(const struct lu_env *env, void *cookie,
1231                             lu_printer_t p, const struct lu_object *l)
1232 {
1233         struct osd_object *o = osd_obj(l);
1234         struct iam_descr  *d;
1235
1236         if (o->oo_dir != NULL)
1237                 d = o->oo_dir->od_container.ic_descr;
1238         else
1239                 d = NULL;
1240         return (*p)(env, cookie,
1241                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
1242                     o, o->oo_inode,
1243                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
1244                     o->oo_inode ? o->oo_inode->i_generation : 0,
1245                     d ? d->id_ops->id_name : "plain");
1246 }
1247
1248 #define GRANT_FOR_LOCAL_OIDS 32 /* 128kB for last_rcvd, quota files, ... */
1249
1250 /*
1251  * Concurrency: shouldn't matter.
1252  */
1253 int osd_statfs(const struct lu_env *env, struct dt_device *d,
1254                struct obd_statfs *sfs)
1255 {
1256         struct osd_device  *osd = osd_dt_dev(d);
1257         struct super_block *sb = osd_sb(osd);
1258         struct kstatfs     *ksfs;
1259         int result = 0;
1260
1261         if (unlikely(osd->od_mnt == NULL))
1262                 return -EINPROGRESS;
1263
1264         /* osd_lproc.c call this without env, allocate ksfs for that case */
1265         if (unlikely(env == NULL)) {
1266                 OBD_ALLOC_PTR(ksfs);
1267                 if (ksfs == NULL)
1268                         return -ENOMEM;
1269         } else {
1270                 ksfs = &osd_oti_get(env)->oti_ksfs;
1271         }
1272
1273         spin_lock(&osd->od_osfs_lock);
1274         result = sb->s_op->statfs(sb->s_root, ksfs);
1275         if (likely(result == 0)) { /* N.B. statfs can't really fail */
1276                 statfs_pack(sfs, ksfs);
1277                 if (sb->s_flags & MS_RDONLY)
1278                         sfs->os_state = OS_STATE_READONLY;
1279         }
1280
1281         spin_unlock(&osd->od_osfs_lock);
1282
1283         if (unlikely(env == NULL))
1284                 OBD_FREE_PTR(ksfs);
1285
1286         /* Reserve a small amount of space for local objects like last_rcvd,
1287          * llog, quota files, ... */
1288         if (sfs->os_bavail <= GRANT_FOR_LOCAL_OIDS) {
1289                 sfs->os_bavail = 0;
1290         } else {
1291                 sfs->os_bavail -= GRANT_FOR_LOCAL_OIDS;
1292                 /** Take out metadata overhead for indirect blocks */
1293                 sfs->os_bavail -= sfs->os_bavail >> (sb->s_blocksize_bits - 3);
1294         }
1295
1296         return result;
1297 }
1298
1299 /**
1300  * Estimate space needed for file creations. We assume the largest filename
1301  * which is 2^64 - 1, hence a filename of 20 chars.
1302  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
1303  */
1304 #ifdef __LDISKFS_DIR_REC_LEN
1305 #define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
1306 #else
1307 #define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
1308 #endif
1309
1310 /*
1311  * Concurrency: doesn't access mutable data.
1312  */
1313 static void osd_conf_get(const struct lu_env *env,
1314                          const struct dt_device *dev,
1315                          struct dt_device_param *param)
1316 {
1317         struct super_block *sb = osd_sb(osd_dt_dev(dev));
1318
1319         /*
1320          * XXX should be taken from not-yet-existing fs abstraction layer.
1321          */
1322         param->ddp_max_name_len = LDISKFS_NAME_LEN;
1323         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
1324         param->ddp_block_shift  = sb->s_blocksize_bits;
1325         param->ddp_mount_type     = LDD_MT_LDISKFS;
1326         param->ddp_maxbytes       = sb->s_maxbytes;
1327         /* Overhead estimate should be fairly accurate, so we really take a tiny
1328          * error margin which also avoids fragmenting the filesystem too much */
1329         param->ddp_grant_reserved = 2; /* end up to be 1.9% after conversion */
1330         /* inode are statically allocated, so per-inode space consumption
1331          * is the space consumed by the directory entry */
1332         param->ddp_inodespace     = PER_OBJ_USAGE;
1333         /* per-fragment overhead to be used by the client code */
1334         param->ddp_grant_frag     = 6 * LDISKFS_BLOCK_SIZE(sb);
1335         param->ddp_mntopts      = 0;
1336         if (test_opt(sb, XATTR_USER))
1337                 param->ddp_mntopts |= MNTOPT_USERXATTR;
1338         if (test_opt(sb, POSIX_ACL))
1339                 param->ddp_mntopts |= MNTOPT_ACL;
1340
1341 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
1342         if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EA_INODE))
1343                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE;
1344         else
1345 #endif
1346                 param->ddp_max_ea_size = sb->s_blocksize;
1347
1348 }
1349
1350 /*
1351  * Concurrency: shouldn't matter.
1352  */
1353 static int osd_sync(const struct lu_env *env, struct dt_device *d)
1354 {
1355         CDEBUG(D_HA, "syncing OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
1356         return ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
1357 }
1358
1359 /**
1360  * Start commit for OSD device.
1361  *
1362  * An implementation of dt_commit_async method for OSD device.
1363  * Asychronously starts underlayng fs sync and thereby a transaction
1364  * commit.
1365  *
1366  * \param env environment
1367  * \param d dt device
1368  *
1369  * \see dt_device_operations
1370  */
1371 static int osd_commit_async(const struct lu_env *env,
1372                             struct dt_device *d)
1373 {
1374         struct super_block *s = osd_sb(osd_dt_dev(d));
1375         ENTRY;
1376
1377         CDEBUG(D_HA, "async commit OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
1378         RETURN(s->s_op->sync_fs(s, 0));
1379 }
1380
1381 /*
1382  * Concurrency: shouldn't matter.
1383  */
1384
1385 static int osd_ro(const struct lu_env *env, struct dt_device *d)
1386 {
1387         struct super_block *sb = osd_sb(osd_dt_dev(d));
1388         struct block_device *dev = sb->s_bdev;
1389 #ifdef HAVE_DEV_SET_RDONLY
1390         struct block_device *jdev = LDISKFS_SB(sb)->journal_bdev;
1391         int rc = 0;
1392 #else
1393         int rc = -EOPNOTSUPP;
1394 #endif
1395         ENTRY;
1396
1397 #ifdef HAVE_DEV_SET_RDONLY
1398         CERROR("*** setting %s read-only ***\n", osd_dt_dev(d)->od_svname);
1399
1400         if (jdev && (jdev != dev)) {
1401                 CDEBUG(D_IOCTL | D_HA, "set journal dev %lx rdonly\n",
1402                        (long)jdev);
1403                 dev_set_rdonly(jdev);
1404         }
1405         CDEBUG(D_IOCTL | D_HA, "set dev %lx rdonly\n", (long)dev);
1406         dev_set_rdonly(dev);
1407 #else
1408         CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
1409                osd_dt_dev(d)->od_svname, (long)dev, rc);
1410 #endif
1411         RETURN(rc);
1412 }
1413
1414 /*
1415  * Concurrency: serialization provided by callers.
1416  */
1417 static int osd_init_capa_ctxt(const struct lu_env *env, struct dt_device *d,
1418                               int mode, unsigned long timeout, __u32 alg,
1419                               struct lustre_capa_key *keys)
1420 {
1421         struct osd_device *dev = osd_dt_dev(d);
1422         ENTRY;
1423
1424         dev->od_fl_capa = mode;
1425         dev->od_capa_timeout = timeout;
1426         dev->od_capa_alg = alg;
1427         dev->od_capa_keys = keys;
1428         RETURN(0);
1429 }
1430
1431 /**
1432  * Note: we do not count into QUOTA here.
1433  * If we mount with --data_journal we may need more.
1434  */
1435 const int osd_dto_credits_noquota[DTO_NR] = {
1436         /**
1437          * Insert/Delete.
1438          * INDEX_EXTRA_TRANS_BLOCKS(8) +
1439          * SINGLEDATA_TRANS_BLOCKS(8)
1440          * XXX Note: maybe iam need more, since iam have more level than
1441          *           EXT3 htree.
1442          */
1443         [DTO_INDEX_INSERT]  = 16,
1444         [DTO_INDEX_DELETE]  = 16,
1445         /**
1446          * Used for OI scrub
1447          */
1448         [DTO_INDEX_UPDATE]  = 16,
1449         /**
1450          * Create a object. The same as create object in EXT3.
1451          * DATA_TRANS_BLOCKS(14) +
1452          * INDEX_EXTRA_BLOCKS(8) +
1453          * 3(inode bits, groups, GDT)
1454          */
1455         [DTO_OBJECT_CREATE] = 25,
1456         /**
1457          * XXX: real credits to be fixed
1458          */
1459         [DTO_OBJECT_DELETE] = 25,
1460         /**
1461          * Attr set credits (inode)
1462          */
1463         [DTO_ATTR_SET_BASE] = 1,
1464         /**
1465          * Xattr set. The same as xattr of EXT3.
1466          * DATA_TRANS_BLOCKS(14)
1467          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
1468          * are also counted in. Do not know why?
1469          */
1470         [DTO_XATTR_SET]     = 14,
1471         [DTO_LOG_REC]       = 14,
1472         /**
1473          * credits for inode change during write.
1474          */
1475         [DTO_WRITE_BASE]    = 3,
1476         /**
1477          * credits for single block write.
1478          */
1479         [DTO_WRITE_BLOCK]   = 14,
1480         /**
1481          * Attr set credits for chown.
1482          * This is extra credits for setattr, and it is null without quota
1483          */
1484         [DTO_ATTR_SET_CHOWN]= 0
1485 };
1486
1487 static const struct dt_device_operations osd_dt_ops = {
1488         .dt_root_get       = osd_root_get,
1489         .dt_statfs         = osd_statfs,
1490         .dt_trans_create   = osd_trans_create,
1491         .dt_trans_start    = osd_trans_start,
1492         .dt_trans_stop     = osd_trans_stop,
1493         .dt_trans_cb_add   = osd_trans_cb_add,
1494         .dt_conf_get       = osd_conf_get,
1495         .dt_sync           = osd_sync,
1496         .dt_ro             = osd_ro,
1497         .dt_commit_async   = osd_commit_async,
1498         .dt_init_capa_ctxt = osd_init_capa_ctxt,
1499 };
1500
1501 static void osd_object_read_lock(const struct lu_env *env,
1502                                  struct dt_object *dt, unsigned role)
1503 {
1504         struct osd_object *obj = osd_dt_obj(dt);
1505         struct osd_thread_info *oti = osd_oti_get(env);
1506
1507         LINVRNT(osd_invariant(obj));
1508
1509         LASSERT(obj->oo_owner != env);
1510         down_read_nested(&obj->oo_sem, role);
1511
1512         LASSERT(obj->oo_owner == NULL);
1513         oti->oti_r_locks++;
1514 }
1515
1516 static void osd_object_write_lock(const struct lu_env *env,
1517                                   struct dt_object *dt, unsigned role)
1518 {
1519         struct osd_object *obj = osd_dt_obj(dt);
1520         struct osd_thread_info *oti = osd_oti_get(env);
1521
1522         LINVRNT(osd_invariant(obj));
1523
1524         LASSERT(obj->oo_owner != env);
1525         down_write_nested(&obj->oo_sem, role);
1526
1527         LASSERT(obj->oo_owner == NULL);
1528         obj->oo_owner = env;
1529         oti->oti_w_locks++;
1530 }
1531
1532 static void osd_object_read_unlock(const struct lu_env *env,
1533                                    struct dt_object *dt)
1534 {
1535         struct osd_object *obj = osd_dt_obj(dt);
1536         struct osd_thread_info *oti = osd_oti_get(env);
1537
1538         LINVRNT(osd_invariant(obj));
1539
1540         LASSERT(oti->oti_r_locks > 0);
1541         oti->oti_r_locks--;
1542         up_read(&obj->oo_sem);
1543 }
1544
1545 static void osd_object_write_unlock(const struct lu_env *env,
1546                                     struct dt_object *dt)
1547 {
1548         struct osd_object *obj = osd_dt_obj(dt);
1549         struct osd_thread_info *oti = osd_oti_get(env);
1550
1551         LINVRNT(osd_invariant(obj));
1552
1553         LASSERT(obj->oo_owner == env);
1554         LASSERT(oti->oti_w_locks > 0);
1555         oti->oti_w_locks--;
1556         obj->oo_owner = NULL;
1557         up_write(&obj->oo_sem);
1558 }
1559
1560 static int osd_object_write_locked(const struct lu_env *env,
1561                                    struct dt_object *dt)
1562 {
1563         struct osd_object *obj = osd_dt_obj(dt);
1564
1565         LINVRNT(osd_invariant(obj));
1566
1567         return obj->oo_owner == env;
1568 }
1569
1570 static int capa_is_sane(const struct lu_env *env,
1571                         struct osd_device *dev,
1572                         struct lustre_capa *capa,
1573                         struct lustre_capa_key *keys)
1574 {
1575         struct osd_thread_info *oti = osd_oti_get(env);
1576         struct lustre_capa *tcapa = &oti->oti_capa;
1577         struct obd_capa *oc;
1578         int i, rc = 0;
1579         ENTRY;
1580
1581         oc = capa_lookup(dev->od_capa_hash, capa, 0);
1582         if (oc) {
1583                 if (capa_is_expired(oc)) {
1584                         DEBUG_CAPA(D_ERROR, capa, "expired");
1585                         rc = -ESTALE;
1586                 }
1587                 capa_put(oc);
1588                 RETURN(rc);
1589         }
1590
1591         if (capa_is_expired_sec(capa)) {
1592                 DEBUG_CAPA(D_ERROR, capa, "expired");
1593                 RETURN(-ESTALE);
1594         }
1595
1596         spin_lock(&capa_lock);
1597         for (i = 0; i < 2; i++) {
1598                 if (keys[i].lk_keyid == capa->lc_keyid) {
1599                         oti->oti_capa_key = keys[i];
1600                         break;
1601                 }
1602         }
1603         spin_unlock(&capa_lock);
1604
1605         if (i == 2) {
1606                 DEBUG_CAPA(D_ERROR, capa, "no matched capa key");
1607                 RETURN(-ESTALE);
1608         }
1609
1610         rc = capa_hmac(tcapa->lc_hmac, capa, oti->oti_capa_key.lk_key);
1611         if (rc)
1612                 RETURN(rc);
1613
1614         if (memcmp(tcapa->lc_hmac, capa->lc_hmac, sizeof(capa->lc_hmac))) {
1615                 DEBUG_CAPA(D_ERROR, capa, "HMAC mismatch");
1616                 RETURN(-EACCES);
1617         }
1618
1619         oc = capa_add(dev->od_capa_hash, capa);
1620         capa_put(oc);
1621
1622         RETURN(0);
1623 }
1624
1625 int osd_object_auth(const struct lu_env *env, struct dt_object *dt,
1626                     struct lustre_capa *capa, __u64 opc)
1627 {
1628         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
1629         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
1630         struct lu_capainfo *lci;
1631         int rc;
1632
1633         if (!osd->od_fl_capa)
1634                 return 0;
1635
1636         if (capa == BYPASS_CAPA)
1637                 return 0;
1638
1639         lci = lu_capainfo_get(env);
1640         if (unlikely(lci == NULL))
1641                 return 0;
1642
1643         if (lci->lci_auth == LC_ID_NONE)
1644                 return 0;
1645
1646         if (capa == NULL) {
1647                 CERROR("%s: no capability provided for FID "DFID": rc = %d\n",
1648                        osd_name(osd), PFID(fid), -EACCES);
1649                 return -EACCES;
1650         }
1651
1652         if (!lu_fid_eq(fid, &capa->lc_fid)) {
1653                 DEBUG_CAPA(D_ERROR, capa, "fid "DFID" mismatch with",
1654                            PFID(fid));
1655                 return -EACCES;
1656         }
1657
1658         if (!capa_opc_supported(capa, opc)) {
1659                 DEBUG_CAPA(D_ERROR, capa, "opc "LPX64" not supported by", opc);
1660                 return -EACCES;
1661         }
1662
1663         rc = capa_is_sane(env, osd, capa, osd->od_capa_keys);
1664         if (rc != 0) {
1665                 DEBUG_CAPA(D_ERROR, capa, "insane: rc = %d", rc);
1666                 return -EACCES;
1667         }
1668
1669         return 0;
1670 }
1671
1672 static struct timespec *osd_inode_time(const struct lu_env *env,
1673                                        struct inode *inode, __u64 seconds)
1674 {
1675         struct osd_thread_info  *oti = osd_oti_get(env);
1676         struct timespec         *t   = &oti->oti_time;
1677
1678         t->tv_sec = seconds;
1679         t->tv_nsec = 0;
1680         *t = timespec_trunc(*t, inode->i_sb->s_time_gran);
1681         return t;
1682 }
1683
1684
1685 static void osd_inode_getattr(const struct lu_env *env,
1686                               struct inode *inode, struct lu_attr *attr)
1687 {
1688         attr->la_valid      |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
1689                                LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
1690                                LA_FLAGS | LA_NLINK | LA_RDEV | LA_BLKSIZE |
1691                                LA_TYPE;
1692
1693         attr->la_atime      = LTIME_S(inode->i_atime);
1694         attr->la_mtime      = LTIME_S(inode->i_mtime);
1695         attr->la_ctime      = LTIME_S(inode->i_ctime);
1696         attr->la_mode       = inode->i_mode;
1697         attr->la_size       = i_size_read(inode);
1698         attr->la_blocks     = inode->i_blocks;
1699         attr->la_uid        = inode->i_uid;
1700         attr->la_gid        = inode->i_gid;
1701         attr->la_flags      = LDISKFS_I(inode)->i_flags;
1702         attr->la_nlink      = inode->i_nlink;
1703         attr->la_rdev       = inode->i_rdev;
1704         attr->la_blksize    = 1 << inode->i_blkbits;
1705         attr->la_blkbits    = inode->i_blkbits;
1706 }
1707
1708 static int osd_attr_get(const struct lu_env *env,
1709                         struct dt_object *dt,
1710                         struct lu_attr *attr,
1711                         struct lustre_capa *capa)
1712 {
1713         struct osd_object *obj = osd_dt_obj(dt);
1714
1715         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
1716         LINVRNT(osd_invariant(obj));
1717
1718         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
1719                 return -EACCES;
1720
1721         spin_lock(&obj->oo_guard);
1722         osd_inode_getattr(env, obj->oo_inode, attr);
1723         spin_unlock(&obj->oo_guard);
1724         return 0;
1725 }
1726
1727 static int osd_declare_attr_set(const struct lu_env *env,
1728                                 struct dt_object *dt,
1729                                 const struct lu_attr *attr,
1730                                 struct thandle *handle)
1731 {
1732         struct osd_thandle     *oh;
1733         struct osd_object      *obj;
1734         struct osd_thread_info *info = osd_oti_get(env);
1735         struct lquota_id_info  *qi = &info->oti_qi;
1736         long long               bspace;
1737         int                     rc = 0;
1738         bool                    allocated;
1739         ENTRY;
1740
1741         LASSERT(dt != NULL);
1742         LASSERT(handle != NULL);
1743
1744         obj = osd_dt_obj(dt);
1745         LASSERT(osd_invariant(obj));
1746
1747         oh = container_of0(handle, struct osd_thandle, ot_super);
1748         LASSERT(oh->ot_handle == NULL);
1749
1750         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
1751                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
1752
1753         if (attr == NULL || obj->oo_inode == NULL)
1754                 RETURN(rc);
1755
1756         bspace   = obj->oo_inode->i_blocks;
1757         bspace <<= obj->oo_inode->i_sb->s_blocksize_bits;
1758         bspace   = toqb(bspace);
1759
1760         /* Changing ownership is always preformed by super user, it should not
1761          * fail with EDQUOT.
1762          *
1763          * We still need to call the osd_declare_qid() to calculate the journal
1764          * credits for updating quota accounting files and to trigger quota
1765          * space adjustment once the operation is completed.*/
1766         if ((attr->la_valid & LA_UID) != 0 &&
1767              attr->la_uid != obj->oo_inode->i_uid) {
1768                 qi->lqi_type = USRQUOTA;
1769
1770                 /* inode accounting */
1771                 qi->lqi_is_blk = false;
1772
1773                 /* one more inode for the new owner ... */
1774                 qi->lqi_id.qid_uid = attr->la_uid;
1775                 qi->lqi_space      = 1;
1776                 allocated = (attr->la_uid == 0) ? true : false;
1777                 rc = osd_declare_qid(env, oh, qi, allocated, NULL);
1778                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1779                         rc = 0;
1780                 if (rc)
1781                         RETURN(rc);
1782
1783                 /* and one less inode for the current uid */
1784                 qi->lqi_id.qid_uid = obj->oo_inode->i_uid;
1785                 qi->lqi_space      = -1;
1786                 rc = osd_declare_qid(env, oh, qi, true, NULL);
1787                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1788                         rc = 0;
1789                 if (rc)
1790                         RETURN(rc);
1791
1792                 /* block accounting */
1793                 qi->lqi_is_blk = true;
1794
1795                 /* more blocks for the new owner ... */
1796                 qi->lqi_id.qid_uid = attr->la_uid;
1797                 qi->lqi_space      = bspace;
1798                 allocated = (attr->la_uid == 0) ? true : false;
1799                 rc = osd_declare_qid(env, oh, qi, allocated, NULL);
1800                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1801                         rc = 0;
1802                 if (rc)
1803                         RETURN(rc);
1804
1805                 /* and finally less blocks for the current owner */
1806                 qi->lqi_id.qid_uid = obj->oo_inode->i_uid;
1807                 qi->lqi_space      = -bspace;
1808                 rc = osd_declare_qid(env, oh, qi, true, NULL);
1809                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1810                         rc = 0;
1811                 if (rc)
1812                         RETURN(rc);
1813         }
1814
1815         if (attr->la_valid & LA_GID &&
1816             attr->la_gid != obj->oo_inode->i_gid) {
1817                 qi->lqi_type = GRPQUOTA;
1818
1819                 /* inode accounting */
1820                 qi->lqi_is_blk = false;
1821
1822                 /* one more inode for the new group owner ... */
1823                 qi->lqi_id.qid_gid = attr->la_gid;
1824                 qi->lqi_space      = 1;
1825                 allocated = (attr->la_gid == 0) ? true : false;
1826                 rc = osd_declare_qid(env, oh, qi, allocated, NULL);
1827                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1828                         rc = 0;
1829                 if (rc)
1830                         RETURN(rc);
1831
1832                 /* and one less inode for the current gid */
1833                 qi->lqi_id.qid_gid = obj->oo_inode->i_gid;
1834                 qi->lqi_space      = -1;
1835                 rc = osd_declare_qid(env, oh, qi, true, NULL);
1836                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1837                         rc = 0;
1838                 if (rc)
1839                         RETURN(rc);
1840
1841                 /* block accounting */
1842                 qi->lqi_is_blk = true;
1843
1844                 /* more blocks for the new owner ... */
1845                 qi->lqi_id.qid_gid = attr->la_gid;
1846                 qi->lqi_space      = bspace;
1847                 allocated = (attr->la_gid == 0) ? true : false;
1848                 rc = osd_declare_qid(env, oh, qi, allocated, NULL);
1849                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1850                         rc = 0;
1851                 if (rc)
1852                         RETURN(rc);
1853
1854                 /* and finally less blocks for the current owner */
1855                 qi->lqi_id.qid_gid = obj->oo_inode->i_gid;
1856                 qi->lqi_space      = -bspace;
1857                 rc = osd_declare_qid(env, oh, qi, true, NULL);
1858                 if (rc == -EDQUOT || rc == -EINPROGRESS)
1859                         rc = 0;
1860                 if (rc)
1861                         RETURN(rc);
1862         }
1863
1864         RETURN(rc);
1865 }
1866
1867 static int osd_inode_setattr(const struct lu_env *env,
1868                              struct inode *inode, const struct lu_attr *attr)
1869 {
1870         __u64 bits;
1871
1872         bits = attr->la_valid;
1873
1874         if (bits & LA_ATIME)
1875                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
1876         if (bits & LA_CTIME)
1877                 inode->i_ctime  = *osd_inode_time(env, inode, attr->la_ctime);
1878         if (bits & LA_MTIME)
1879                 inode->i_mtime  = *osd_inode_time(env, inode, attr->la_mtime);
1880         if (bits & LA_SIZE) {
1881                 LDISKFS_I(inode)->i_disksize = attr->la_size;
1882                 i_size_write(inode, attr->la_size);
1883         }
1884
1885 #if 0
1886         /* OSD should not change "i_blocks" which is used by quota.
1887          * "i_blocks" should be changed by ldiskfs only. */
1888         if (bits & LA_BLOCKS)
1889                 inode->i_blocks = attr->la_blocks;
1890 #endif
1891         if (bits & LA_MODE)
1892                 inode->i_mode   = (inode->i_mode & S_IFMT) |
1893                         (attr->la_mode & ~S_IFMT);
1894         if (bits & LA_UID)
1895                 inode->i_uid    = attr->la_uid;
1896         if (bits & LA_GID)
1897                 inode->i_gid    = attr->la_gid;
1898         if (bits & LA_NLINK)
1899                 set_nlink(inode, attr->la_nlink);
1900         if (bits & LA_RDEV)
1901                 inode->i_rdev   = attr->la_rdev;
1902
1903         if (bits & LA_FLAGS) {
1904                 /* always keep S_NOCMTIME */
1905                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
1906                                  S_NOCMTIME;
1907         }
1908         return 0;
1909 }
1910
1911 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr)
1912 {
1913         if ((attr->la_valid & LA_UID && attr->la_uid != inode->i_uid) ||
1914             (attr->la_valid & LA_GID && attr->la_gid != inode->i_gid)) {
1915                 struct iattr    iattr;
1916                 int             rc;
1917
1918                 iattr.ia_valid = 0;
1919                 if (attr->la_valid & LA_UID)
1920                         iattr.ia_valid |= ATTR_UID;
1921                 if (attr->la_valid & LA_GID)
1922                         iattr.ia_valid |= ATTR_GID;
1923                 iattr.ia_uid = attr->la_uid;
1924                 iattr.ia_gid = attr->la_gid;
1925
1926                 rc = ll_vfs_dq_transfer(inode, &iattr);
1927                 if (rc) {
1928                         CERROR("%s: quota transfer failed: rc = %d. Is quota "
1929                                "enforcement enabled on the ldiskfs filesystem?",
1930                                inode->i_sb->s_id, rc);
1931                         return rc;
1932                 }
1933         }
1934         return 0;
1935 }
1936
1937 static int osd_attr_set(const struct lu_env *env,
1938                         struct dt_object *dt,
1939                         const struct lu_attr *attr,
1940                         struct thandle *handle,
1941                         struct lustre_capa *capa)
1942 {
1943         struct osd_object *obj = osd_dt_obj(dt);
1944         struct inode      *inode;
1945         int rc;
1946
1947         LASSERT(handle != NULL);
1948         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
1949         LASSERT(osd_invariant(obj));
1950
1951         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
1952                 return -EACCES;
1953
1954         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
1955
1956         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING)) {
1957                 struct osd_thread_info  *oti  = osd_oti_get(env);
1958                 const struct lu_fid     *fid0 = lu_object_fid(&dt->do_lu);
1959                 struct lu_fid           *fid1 = &oti->oti_fid;
1960                 struct osd_inode_id     *id   = &oti->oti_id;
1961                 struct iam_path_descr   *ipd;
1962                 struct iam_container    *bag;
1963                 struct osd_thandle      *oh;
1964                 int                      rc;
1965
1966                 fid_cpu_to_be(fid1, fid0);
1967                 memset(id, 1, sizeof(*id));
1968                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
1969                                   fid0)->oi_dir.od_container;
1970                 ipd = osd_idx_ipd_get(env, bag);
1971                 if (unlikely(ipd == NULL))
1972                         RETURN(-ENOMEM);
1973
1974                 oh = container_of0(handle, struct osd_thandle, ot_super);
1975                 rc = iam_update(oh->ot_handle, bag, (const struct iam_key *)fid1,
1976                                 (const struct iam_rec *)id, ipd);
1977                 osd_ipd_put(env, bag, ipd);
1978                 return(rc > 0 ? 0 : rc);
1979         }
1980
1981         inode = obj->oo_inode;
1982         ll_vfs_dq_init(inode);
1983
1984         rc = osd_quota_transfer(inode, attr);
1985         if (rc)
1986                 return rc;
1987
1988         spin_lock(&obj->oo_guard);
1989         rc = osd_inode_setattr(env, inode, attr);
1990         spin_unlock(&obj->oo_guard);
1991
1992         if (!rc)
1993                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1994         return rc;
1995 }
1996
1997 struct dentry *osd_child_dentry_get(const struct lu_env *env,
1998                                     struct osd_object *obj,
1999                                     const char *name, const int namelen)
2000 {
2001         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
2002 }
2003
2004 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
2005                       umode_t mode, struct dt_allocation_hint *hint,
2006                       struct thandle *th)
2007 {
2008         int result;
2009         struct osd_device  *osd = osd_obj2dev(obj);
2010         struct osd_thandle *oth;
2011         struct dt_object   *parent = NULL;
2012         struct inode       *inode;
2013
2014         LINVRNT(osd_invariant(obj));
2015         LASSERT(obj->oo_inode == NULL);
2016         LASSERT(obj->oo_hl_head == NULL);
2017
2018         if (S_ISDIR(mode) && ldiskfs_pdo) {
2019                 obj->oo_hl_head =ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
2020                 if (obj->oo_hl_head == NULL)
2021                         return -ENOMEM;
2022         }
2023
2024         oth = container_of(th, struct osd_thandle, ot_super);
2025         LASSERT(oth->ot_handle->h_transaction != NULL);
2026
2027         if (hint && hint->dah_parent)
2028                 parent = hint->dah_parent;
2029
2030         inode = ldiskfs_create_inode(oth->ot_handle,
2031                                      parent ? osd_dt_obj(parent)->oo_inode :
2032                                               osd_sb(osd)->s_root->d_inode,
2033                                      mode);
2034         if (!IS_ERR(inode)) {
2035                 /* Do not update file c/mtime in ldiskfs.
2036                  * NB: don't need any lock because no contention at this
2037                  * early stage */
2038                 inode->i_flags |= S_NOCMTIME;
2039
2040                 /* For new created object, it must be consistent,
2041                  * and it is unnecessary to scrub against it. */
2042                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
2043                 obj->oo_inode = inode;
2044                 result = 0;
2045         } else {
2046                 if (obj->oo_hl_head != NULL) {
2047                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
2048                         obj->oo_hl_head = NULL;
2049                 }
2050                 result = PTR_ERR(inode);
2051         }
2052         LINVRNT(osd_invariant(obj));
2053         return result;
2054 }
2055
2056 enum {
2057         OSD_NAME_LEN = 255
2058 };
2059
2060 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
2061                      struct lu_attr *attr,
2062                      struct dt_allocation_hint *hint,
2063                      struct dt_object_format *dof,
2064                      struct thandle *th)
2065 {
2066         int result;
2067         struct osd_thandle *oth;
2068         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX));
2069
2070         LASSERT(S_ISDIR(attr->la_mode));
2071
2072         oth = container_of(th, struct osd_thandle, ot_super);
2073         LASSERT(oth->ot_handle->h_transaction != NULL);
2074         result = osd_mkfile(info, obj, mode, hint, th);
2075
2076         return result;
2077 }
2078
2079 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
2080                         struct lu_attr *attr,
2081                         struct dt_allocation_hint *hint,
2082                         struct dt_object_format *dof,
2083                         struct thandle *th)
2084 {
2085         int result;
2086         struct osd_thandle *oth;
2087         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
2088
2089         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
2090
2091         LASSERT(S_ISREG(attr->la_mode));
2092
2093         oth = container_of(th, struct osd_thandle, ot_super);
2094         LASSERT(oth->ot_handle->h_transaction != NULL);
2095
2096         result = osd_mkfile(info, obj, mode, hint, th);
2097         if (result == 0) {
2098                 LASSERT(obj->oo_inode != NULL);
2099                 if (feat->dif_flags & DT_IND_VARKEY)
2100                         result = iam_lvar_create(obj->oo_inode,
2101                                                  feat->dif_keysize_max,
2102                                                  feat->dif_ptrsize,
2103                                                  feat->dif_recsize_max,
2104                                                  oth->ot_handle);
2105                 else
2106                         result = iam_lfix_create(obj->oo_inode,
2107                                                  feat->dif_keysize_max,
2108                                                  feat->dif_ptrsize,
2109                                                  feat->dif_recsize_max,
2110                                                  oth->ot_handle);
2111
2112         }
2113         return result;
2114 }
2115
2116 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
2117                      struct lu_attr *attr,
2118                      struct dt_allocation_hint *hint,
2119                      struct dt_object_format *dof,
2120                      struct thandle *th)
2121 {
2122         LASSERT(S_ISREG(attr->la_mode));
2123         return osd_mkfile(info, obj, (attr->la_mode &
2124                                (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2125 }
2126
2127 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
2128                      struct lu_attr *attr,
2129                      struct dt_allocation_hint *hint,
2130                      struct dt_object_format *dof,
2131                      struct thandle *th)
2132 {
2133         LASSERT(S_ISLNK(attr->la_mode));
2134         return osd_mkfile(info, obj, (attr->la_mode &
2135                               (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
2136 }
2137
2138 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
2139                      struct lu_attr *attr,
2140                      struct dt_allocation_hint *hint,
2141                      struct dt_object_format *dof,
2142                      struct thandle *th)
2143 {
2144         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
2145         int result;
2146
2147         LINVRNT(osd_invariant(obj));
2148         LASSERT(obj->oo_inode == NULL);
2149         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
2150                 S_ISFIFO(mode) || S_ISSOCK(mode));
2151
2152         result = osd_mkfile(info, obj, mode, hint, th);
2153         if (result == 0) {
2154                 LASSERT(obj->oo_inode != NULL);
2155                 /*
2156                  * This inode should be marked dirty for i_rdev.  Currently
2157                  * that is done in the osd_attr_init().
2158                  */
2159                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
2160                                    attr->la_rdev);
2161         }
2162         LINVRNT(osd_invariant(obj));
2163         return result;
2164 }
2165
2166 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
2167                               struct lu_attr *,
2168                               struct dt_allocation_hint *hint,
2169                               struct dt_object_format *dof,
2170                               struct thandle *);
2171
2172 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
2173 {
2174         osd_obj_type_f result;
2175
2176         switch (type) {
2177         case DFT_DIR:
2178                 result = osd_mkdir;
2179                 break;
2180         case DFT_REGULAR:
2181                 result = osd_mkreg;
2182                 break;
2183         case DFT_SYM:
2184                 result = osd_mksym;
2185                 break;
2186         case DFT_NODE:
2187                 result = osd_mknod;
2188                 break;
2189         case DFT_INDEX:
2190                 result = osd_mk_index;
2191                 break;
2192
2193         default:
2194                 LBUG();
2195                 break;
2196         }
2197         return result;
2198 }
2199
2200
2201 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
2202                         struct dt_object *parent, struct dt_object *child,
2203                         umode_t child_mode)
2204 {
2205         LASSERT(ah);
2206
2207         ah->dah_parent = parent;
2208         ah->dah_mode = child_mode;
2209 }
2210
2211 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
2212                           struct lu_attr *attr, struct dt_object_format *dof)
2213 {
2214         struct inode   *inode = obj->oo_inode;
2215         __u64           valid = attr->la_valid;
2216         int             result;
2217
2218         attr->la_valid &= ~(LA_TYPE | LA_MODE);
2219
2220         if (dof->dof_type != DFT_NODE)
2221                 attr->la_valid &= ~LA_RDEV;
2222         if ((valid & LA_ATIME) && (attr->la_atime == LTIME_S(inode->i_atime)))
2223                 attr->la_valid &= ~LA_ATIME;
2224         if ((valid & LA_CTIME) && (attr->la_ctime == LTIME_S(inode->i_ctime)))
2225                 attr->la_valid &= ~LA_CTIME;
2226         if ((valid & LA_MTIME) && (attr->la_mtime == LTIME_S(inode->i_mtime)))
2227                 attr->la_valid &= ~LA_MTIME;
2228
2229         result = osd_quota_transfer(inode, attr);
2230         if (result)
2231                 return;
2232
2233         if (attr->la_valid != 0) {
2234                 result = osd_inode_setattr(info->oti_env, inode, attr);
2235                 /*
2236                  * The osd_inode_setattr() should always succeed here.  The
2237                  * only error that could be returned is EDQUOT when we are
2238                  * trying to change the UID or GID of the inode. However, this
2239                  * should not happen since quota enforcement is no longer
2240                  * enabled on ldiskfs (lquota takes care of it).
2241                  */
2242                 LASSERTF(result == 0, "%d", result);
2243                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2244         }
2245
2246         attr->la_valid = valid;
2247 }
2248
2249 /**
2250  * Helper function for osd_object_create()
2251  *
2252  * \retval 0, on success
2253  */
2254 static int __osd_object_create(struct osd_thread_info *info,
2255                                struct osd_object *obj, struct lu_attr *attr,
2256                                struct dt_allocation_hint *hint,
2257                                struct dt_object_format *dof,
2258                                struct thandle *th)
2259 {
2260         int     result;
2261         __u32   umask;
2262
2263         /* we drop umask so that permissions we pass are not affected */
2264         umask = current->fs->umask;
2265         current->fs->umask = 0;
2266
2267         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
2268                                                   th);
2269         if (result == 0) {
2270                 osd_attr_init(info, obj, attr, dof);
2271                 osd_object_init0(obj);
2272                 /* bz 24037 */
2273                 if (obj->oo_inode && (obj->oo_inode->i_state & I_NEW))
2274                         unlock_new_inode(obj->oo_inode);
2275         }
2276
2277         /* restore previous umask value */
2278         current->fs->umask = umask;
2279
2280         return result;
2281 }
2282
2283 /**
2284  * Helper function for osd_object_create()
2285  *
2286  * \retval 0, on success
2287  */
2288 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
2289                            const struct lu_fid *fid, struct thandle *th)
2290 {
2291         struct osd_thread_info *info = osd_oti_get(env);
2292         struct osd_inode_id    *id   = &info->oti_id;
2293         struct osd_device      *osd  = osd_obj2dev(obj);
2294         struct osd_thandle     *oh;
2295
2296         LASSERT(obj->oo_inode != NULL);
2297
2298         oh = container_of0(th, struct osd_thandle, ot_super);
2299         LASSERT(oh->ot_handle);
2300
2301         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
2302         return osd_oi_insert(info, osd, fid, id, oh->ot_handle, OI_CHECK_FLD);
2303 }
2304
2305 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
2306                    obd_seq seq, struct lu_seq_range *range)
2307 {
2308         struct seq_server_site  *ss = osd_seq_site(osd);
2309
2310         if (fid_seq_is_idif(seq)) {
2311                 fld_range_set_ost(range);
2312                 range->lsr_index = idif_ost_idx(seq);
2313                 return 0;
2314         }
2315
2316         if (!fid_seq_in_fldb(seq)) {
2317                 fld_range_set_mdt(range);
2318                 if (ss != NULL)
2319                         /* FIXME: If ss is NULL, it suppose not get lsr_index
2320                          * at all */
2321                         range->lsr_index = ss->ss_node_id;
2322                 return 0;
2323         }
2324
2325         LASSERT(ss != NULL);
2326         fld_range_set_any(range);
2327         /* OSD will only do local fld lookup */
2328         return fld_local_lookup(env, ss->ss_server_fld, seq, range);
2329 }
2330
2331 /*
2332  * Concurrency: no external locking is necessary.
2333  */
2334 static int osd_declare_object_create(const struct lu_env *env,
2335                                      struct dt_object *dt,
2336                                      struct lu_attr *attr,
2337                                      struct dt_allocation_hint *hint,
2338                                      struct dt_object_format *dof,
2339                                      struct thandle *handle)
2340 {
2341         struct osd_thandle      *oh;
2342         int                      rc;
2343         ENTRY;
2344
2345         LASSERT(handle != NULL);
2346
2347         oh = container_of0(handle, struct osd_thandle, ot_super);
2348         LASSERT(oh->ot_handle == NULL);
2349
2350         osd_trans_declare_op(env, oh, OSD_OT_CREATE,
2351                              osd_dto_credits_noquota[DTO_OBJECT_CREATE]);
2352         if (!fid_is_on_ost(osd_oti_get(env), osd_dt_dev(handle->th_dev),
2353                            lu_object_fid(&dt->do_lu), OI_CHECK_FLD))
2354                 /* Reuse idle OI block may cause additional one OI block
2355                  * to be changed. */
2356                 osd_trans_declare_op(env, oh, OSD_OT_INSERT,
2357                                 osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
2358
2359         /* If this is directory, then we expect . and .. to be inserted as
2360          * well. The one directory block always needs to be created for the
2361          * directory, so we could use DTO_WRITE_BASE here (GDT, block bitmap,
2362          * block), there is no danger of needing a tree for the first block.
2363          */
2364         if (attr && S_ISDIR(attr->la_mode)) {
2365                 osd_trans_declare_op(env, oh, OSD_OT_INSERT,
2366                                      osd_dto_credits_noquota[DTO_WRITE_BASE]);
2367                 osd_trans_declare_op(env, oh, OSD_OT_INSERT, 0);
2368         }
2369
2370         if (!attr)
2371                 RETURN(0);
2372
2373         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid, 1, oh,
2374                                    false, false, NULL, false);
2375         if (rc != 0)
2376                 RETURN(rc);
2377
2378         RETURN(rc);
2379 }
2380
2381 static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
2382                              struct lu_attr *attr,
2383                              struct dt_allocation_hint *hint,
2384                              struct dt_object_format *dof,
2385                              struct thandle *th)
2386 {
2387         const struct lu_fid    *fid    = lu_object_fid(&dt->do_lu);
2388         struct osd_object      *obj    = osd_dt_obj(dt);
2389         struct osd_thread_info *info   = osd_oti_get(env);
2390         int result;
2391
2392         ENTRY;
2393
2394         LINVRNT(osd_invariant(obj));
2395         LASSERT(!dt_object_exists(dt) && !dt_object_remote(dt));
2396         LASSERT(osd_write_locked(env, obj));
2397         LASSERT(th != NULL);
2398
2399         if (unlikely(fid_is_acct(fid)))
2400                 /* Quota files can't be created from the kernel any more,
2401                  * 'tune2fs -O quota' will take care of creating them */
2402                 RETURN(-EPERM);
2403
2404         osd_trans_exec_op(env, th, OSD_OT_CREATE);
2405         osd_trans_declare_rb(env, th, OSD_OT_REF_ADD);
2406
2407         result = __osd_object_create(info, obj, attr, hint, dof, th);
2408         if (result == 0)
2409                 result = __osd_oi_insert(env, obj, fid, th);
2410
2411         LASSERT(ergo(result == 0,
2412                      dt_object_exists(dt) && !dt_object_remote(dt)));
2413
2414         LASSERT(osd_invariant(obj));
2415         RETURN(result);
2416 }
2417
2418 /**
2419  * Called to destroy on-disk representation of the object
2420  *
2421  * Concurrency: must be locked
2422  */
2423 static int osd_declare_object_destroy(const struct lu_env *env,
2424                                       struct dt_object *dt,
2425                                       struct thandle *th)
2426 {
2427         struct osd_object  *obj = osd_dt_obj(dt);
2428         struct inode       *inode = obj->oo_inode;
2429         struct osd_thandle *oh;
2430         int                 rc;
2431         ENTRY;
2432
2433         oh = container_of0(th, struct osd_thandle, ot_super);
2434         LASSERT(oh->ot_handle == NULL);
2435         LASSERT(inode);
2436
2437         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
2438                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
2439         /* Recycle idle OI leaf may cause additional three OI blocks
2440          * to be changed. */
2441         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
2442                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
2443         /* one less inode */
2444         rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, -1, oh,
2445                                    false, true, NULL, false);
2446         if (rc)
2447                 RETURN(rc);
2448         /* data to be truncated */
2449         rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, 0, oh,
2450                                    true, true, NULL, false);
2451         RETURN(rc);
2452 }
2453
2454 static int osd_object_destroy(const struct lu_env *env,
2455                               struct dt_object *dt,
2456                               struct thandle *th)
2457 {
2458         const struct lu_fid    *fid = lu_object_fid(&dt->do_lu);
2459         struct osd_object      *obj = osd_dt_obj(dt);
2460         struct inode           *inode = obj->oo_inode;
2461         struct osd_device      *osd = osd_obj2dev(obj);
2462         struct osd_thandle     *oh;
2463         int                     result;
2464         ENTRY;
2465
2466         oh = container_of0(th, struct osd_thandle, ot_super);
2467         LASSERT(oh->ot_handle);
2468         LASSERT(inode);
2469         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
2470
2471         if (unlikely(fid_is_acct(fid)))
2472                 RETURN(-EPERM);
2473
2474         if (S_ISDIR(inode->i_mode)) {
2475                 LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1 ||
2476                         inode->i_nlink == 2);
2477                 /* it will check/delete the inode from remote parent,
2478                  * how to optimize it? unlink performance impaction XXX */
2479                 result = osd_delete_from_remote_parent(env, osd, obj, oh);
2480                 if (result != 0 && result != -ENOENT) {
2481                         CERROR("%s: delete inode "DFID": rc = %d\n",
2482                                osd_name(osd), PFID(fid), result);
2483                 }
2484                 spin_lock(&obj->oo_guard);
2485                 clear_nlink(inode);
2486                 spin_unlock(&obj->oo_guard);
2487                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2488         }
2489
2490         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
2491
2492         result = osd_oi_delete(osd_oti_get(env), osd, fid, oh->ot_handle,
2493                                OI_CHECK_FLD);
2494
2495         /* XXX: add to ext3 orphan list */
2496         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
2497
2498         /* not needed in the cache anymore */
2499         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
2500
2501         RETURN(0);
2502 }
2503
2504 /**
2505  * Put the fid into lustre_mdt_attrs, and then place the structure
2506  * inode's ea. This fid should not be altered during the life time
2507  * of the inode.
2508  *
2509  * \retval +ve, on success
2510  * \retval -ve, on error
2511  *
2512  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
2513  */
2514 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
2515                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
2516 {
2517         struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
2518         int                      rc;
2519         ENTRY;
2520
2521         if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
2522                 RETURN(0);
2523
2524         lustre_lma_init(lma, fid, compat, incompat);
2525         lustre_lma_swab(lma);
2526
2527         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma, sizeof(*lma),
2528                              XATTR_CREATE);
2529         /* LMA may already exist, but we need to check that all the
2530          * desired compat/incompat flags have been added. */
2531         if (unlikely(rc == -EEXIST)) {
2532                 if (compat == 0 && incompat == 0)
2533                         RETURN(0);
2534
2535                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
2536                                      XATTR_NAME_LMA, info->oti_mdt_attrs_old,
2537                                      LMA_OLD_SIZE);
2538                 if (rc <= 0)
2539                         RETURN(-EINVAL);
2540
2541                 lustre_lma_swab(lma);
2542                 if (!(~lma->lma_compat & compat) &&
2543                     !(~lma->lma_incompat & incompat))
2544                         RETURN(0);
2545
2546                 lma->lma_compat |= compat;
2547                 lma->lma_incompat |= incompat;
2548                 lustre_lma_swab(lma);
2549                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
2550                                      sizeof(*lma), XATTR_REPLACE);
2551         }
2552
2553         RETURN(rc);
2554 }
2555
2556 /**
2557  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
2558  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
2559  * To have compatilibility with 1.8 ldiskfs driver we need to have
2560  * magic number at start of fid data.
2561  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
2562  * its inmemory API.
2563  */
2564 void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
2565                                   const struct dt_rec *fid)
2566 {
2567         if (!fid_is_namespace_visible((const struct lu_fid *)fid) ||
2568             OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
2569                 param->edp_magic = 0;
2570                 return;
2571         }
2572
2573         param->edp_magic = LDISKFS_LUFID_MAGIC;
2574         param->edp_len =  sizeof(struct lu_fid) + 1;
2575         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
2576 }
2577
2578 /**
2579  * Try to read the fid from inode ea into dt_rec.
2580  *
2581  * \param fid object fid.
2582  *
2583  * \retval 0 on success
2584  */
2585 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
2586                           __u32 ino, struct lu_fid *fid,
2587                           struct osd_inode_id *id)
2588 {
2589         struct osd_thread_info *info  = osd_oti_get(env);
2590         struct inode           *inode;
2591         ENTRY;
2592
2593         osd_id_gen(id, ino, OSD_OII_NOGEN);
2594         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
2595         if (IS_ERR(inode))
2596                 RETURN(PTR_ERR(inode));
2597
2598         iput(inode);
2599         RETURN(0);
2600 }
2601
2602 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
2603                                         struct inode *dir,
2604                                         struct inode  *parent_dir,
2605                                         const struct dt_rec *dot_fid,
2606                                         const struct dt_rec *dot_dot_fid,
2607                                         struct osd_thandle *oth)
2608 {
2609         struct ldiskfs_dentry_param *dot_ldp;
2610         struct ldiskfs_dentry_param *dot_dot_ldp;
2611
2612         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
2613         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
2614
2615         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
2616         dot_ldp->edp_magic = 0;
2617         return ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
2618                                         dir, dot_ldp, dot_dot_ldp);
2619 }
2620
2621 /**
2622  * Create an local agent inode for remote entry
2623  */
2624 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
2625                                                   struct osd_device *osd,
2626                                                   struct osd_object *pobj,
2627                                                   const struct lu_fid *fid,
2628                                                   struct thandle *th)
2629 {
2630         struct osd_thread_info  *info = osd_oti_get(env);
2631         struct inode            *local;
2632         struct osd_thandle      *oh;
2633         int                     rc;
2634         ENTRY;
2635
2636         LASSERT(th);
2637         oh = container_of(th, struct osd_thandle, ot_super);
2638         LASSERT(oh->ot_handle->h_transaction != NULL);
2639
2640         /* FIXME: Insert index api needs to know the mode of
2641          * the remote object. Just use S_IFDIR for now */
2642         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode, S_IFDIR);
2643         if (IS_ERR(local)) {
2644                 CERROR("%s: create local error %d\n", osd_name(osd),
2645                        (int)PTR_ERR(local));
2646                 RETURN(local);
2647         }
2648
2649         /* Set special LMA flag for local agent inode */
2650         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
2651         if (rc != 0) {
2652                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
2653                        osd_name(osd), PFID(fid), rc);
2654                 RETURN(ERR_PTR(rc));
2655         }
2656
2657         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
2658                 (const struct dt_rec *)lu_object_fid(&pobj->oo_dt.do_lu),
2659                 (const struct dt_rec *)fid, oh);
2660         if (rc != 0) {
2661                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
2662                         osd_name(osd), PFID(fid), rc);
2663                 RETURN(ERR_PTR(rc));
2664         }
2665
2666         RETURN(local);
2667 }
2668
2669 /**
2670  * Delete local agent inode for remote entry
2671  */
2672 static int osd_delete_local_agent_inode(const struct lu_env *env,
2673                                         struct osd_device *osd,
2674                                         const struct lu_fid *fid,
2675                                         __u32 ino, struct osd_thandle *oh)
2676 {
2677         struct osd_thread_info  *oti = osd_oti_get(env);
2678         struct osd_inode_id     *id = &oti->oti_id;
2679         struct inode            *inode;
2680         ENTRY;
2681
2682         id->oii_ino = le32_to_cpu(ino);
2683         id->oii_gen = OSD_OII_NOGEN;
2684         inode = osd_iget(oti, osd, id);
2685         if (IS_ERR(inode)) {
2686                 CERROR("%s: iget error "DFID" id %u:%u\n", osd_name(osd),
2687                        PFID(fid), id->oii_ino, id->oii_gen);
2688                 RETURN(PTR_ERR(inode));
2689         }
2690
2691         clear_nlink(inode);
2692         mark_inode_dirty(inode);
2693         CDEBUG(D_INODE, "%s: delete remote inode "DFID" %lu\n",
2694                 osd_name(osd), PFID(fid), inode->i_ino);
2695         iput(inode);
2696         RETURN(0);
2697 }
2698
2699 /**
2700  * OSD layer object create function for interoperability mode (b11826).
2701  * This is mostly similar to osd_object_create(). Only difference being, fid is
2702  * inserted into inode ea here.
2703  *
2704  * \retval   0, on success
2705  * \retval -ve, on error
2706  */
2707 static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
2708                                 struct lu_attr *attr,
2709                                 struct dt_allocation_hint *hint,
2710                                 struct dt_object_format *dof,
2711                                 struct thandle *th)
2712 {
2713         const struct lu_fid    *fid    = lu_object_fid(&dt->do_lu);
2714         struct osd_object      *obj    = osd_dt_obj(dt);
2715         struct osd_thread_info *info   = osd_oti_get(env);
2716         int                     result;
2717
2718         ENTRY;
2719
2720         LASSERT(osd_invariant(obj));
2721         LASSERT(!dt_object_exists(dt) && !dt_object_remote(dt));
2722         LASSERT(osd_write_locked(env, obj));
2723         LASSERT(th != NULL);
2724
2725         if (unlikely(fid_is_acct(fid)))
2726                 /* Quota files can't be created from the kernel any more,
2727                  * 'tune2fs -O quota' will take care of creating them */
2728                 RETURN(-EPERM);
2729
2730         osd_trans_exec_op(env, th, OSD_OT_CREATE);
2731         osd_trans_declare_rb(env, th, OSD_OT_REF_ADD);
2732
2733         result = __osd_object_create(info, obj, attr, hint, dof, th);
2734         if (result == 0)
2735                 result = osd_ea_fid_set(info, obj->oo_inode, fid,
2736                                 fid_is_on_ost(info, osd_obj2dev(obj),
2737                                               fid, OI_CHECK_FLD) ?
2738                                 LMAC_FID_ON_OST : 0, 0);
2739
2740         if (result == 0)
2741                 result = __osd_oi_insert(env, obj, fid, th);
2742
2743         LASSERT(ergo(result == 0,
2744                      dt_object_exists(dt) && !dt_object_remote(dt)));
2745         LINVRNT(osd_invariant(obj));
2746         RETURN(result);
2747 }
2748
2749 static int osd_declare_object_ref_add(const struct lu_env *env,
2750                                       struct dt_object *dt,
2751                                       struct thandle *handle)
2752 {
2753         struct osd_thandle       *oh;
2754
2755         /* it's possible that object doesn't exist yet */
2756         LASSERT(handle != NULL);
2757
2758         oh = container_of0(handle, struct osd_thandle, ot_super);
2759         LASSERT(oh->ot_handle == NULL);
2760
2761         osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
2762                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2763
2764         return 0;
2765 }
2766
2767 /*
2768  * Concurrency: @dt is write locked.
2769  */
2770 static int osd_object_ref_add(const struct lu_env *env,
2771                               struct dt_object *dt, struct thandle *th)
2772 {
2773         struct osd_object  *obj = osd_dt_obj(dt);
2774         struct inode       *inode = obj->oo_inode;
2775         struct osd_thandle *oh;
2776         int                 rc = 0;
2777
2778         LINVRNT(osd_invariant(obj));
2779         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2780         LASSERT(osd_write_locked(env, obj));
2781         LASSERT(th != NULL);
2782
2783         oh = container_of0(th, struct osd_thandle, ot_super);
2784         LASSERT(oh->ot_handle != NULL);
2785
2786         osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
2787
2788         /*
2789          * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
2790          * (65000) subdirectories by storing "1" in i_nlink if the link count
2791          * would otherwise overflow. Directory tranversal tools understand
2792          * that (st_nlink == 1) indicates that the filesystem dose not track
2793          * hard links count on the directory, and will not abort subdirectory
2794          * scanning early once (st_nlink - 2) subdirs have been found.
2795          *
2796          * This also has to properly handle the case of inodes with nlink == 0
2797          * in case they are being linked into the PENDING directory
2798          */
2799         spin_lock(&obj->oo_guard);
2800         ldiskfs_inc_count(oh->ot_handle, inode);
2801         LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
2802         spin_unlock(&obj->oo_guard);
2803
2804         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2805         LINVRNT(osd_invariant(obj));
2806
2807         return rc;
2808 }
2809
2810 static int osd_declare_object_ref_del(const struct lu_env *env,
2811                                       struct dt_object *dt,
2812                                       struct thandle *handle)
2813 {
2814         struct osd_thandle *oh;
2815
2816         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2817         LASSERT(handle != NULL);
2818
2819         oh = container_of0(handle, struct osd_thandle, ot_super);
2820         LASSERT(oh->ot_handle == NULL);
2821
2822         osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
2823                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2824
2825         return 0;
2826 }
2827
2828 /*
2829  * Concurrency: @dt is write locked.
2830  */
2831 static int osd_object_ref_del(const struct lu_env *env, struct dt_object *dt,
2832                               struct thandle *th)
2833 {
2834         struct osd_object       *obj = osd_dt_obj(dt);
2835         struct inode            *inode = obj->oo_inode;
2836         struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
2837         struct osd_thandle      *oh;
2838
2839         LINVRNT(osd_invariant(obj));
2840         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2841         LASSERT(osd_write_locked(env, obj));
2842         LASSERT(th != NULL);
2843
2844         oh = container_of0(th, struct osd_thandle, ot_super);
2845         LASSERT(oh->ot_handle != NULL);
2846
2847         osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
2848
2849         spin_lock(&obj->oo_guard);
2850         /* That can be result of upgrade from old Lustre version and
2851          * applied only to local files.  Just skip this ref_del call.
2852          * ext4_unlink() only treats this as a warning, don't LASSERT here.*/
2853         if (inode->i_nlink == 0) {
2854                 CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
2855                              D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
2856                              ", maybe an upgraded file? (LU-3915)\n",
2857                              osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
2858                 spin_unlock(&obj->oo_guard);
2859                 return 0;
2860         }
2861
2862         ldiskfs_dec_count(oh->ot_handle, inode);
2863         spin_unlock(&obj->oo_guard);
2864
2865         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2866         LINVRNT(osd_invariant(obj));
2867
2868         return 0;
2869 }
2870
2871 /*
2872  * Get the 64-bit version for an inode.
2873  */
2874 static int osd_object_version_get(const struct lu_env *env,
2875                                   struct dt_object *dt, dt_obj_version_t *ver)
2876 {
2877         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2878
2879         CDEBUG(D_INODE, "Get version "LPX64" for inode %lu\n",
2880                LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2881         *ver = LDISKFS_I(inode)->i_fs_version;
2882         return 0;
2883 }
2884
2885 /*
2886  * Concurrency: @dt is read locked.
2887  */
2888 static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
2889                          struct lu_buf *buf, const char *name,
2890                          struct lustre_capa *capa)
2891 {
2892         struct osd_object      *obj    = osd_dt_obj(dt);
2893         struct inode           *inode  = obj->oo_inode;
2894         struct osd_thread_info *info   = osd_oti_get(env);
2895         struct dentry          *dentry = &info->oti_obj_dentry;
2896
2897         /* version get is not real XATTR but uses xattr API */
2898         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2899                 /* for version we are just using xattr API but change inode
2900                  * field instead */
2901                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
2902                 osd_object_version_get(env, dt, buf->lb_buf);
2903                 return sizeof(dt_obj_version_t);
2904         }
2905
2906         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
2907         LASSERT(inode->i_op != NULL && inode->i_op->getxattr != NULL);
2908
2909         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
2910                 return -EACCES;
2911
2912         return __osd_xattr_get(inode, dentry, name, buf->lb_buf, buf->lb_len);
2913 }
2914
2915
2916 static int osd_declare_xattr_set(const struct lu_env *env,
2917                                  struct dt_object *dt,
2918                                  const struct lu_buf *buf, const char *name,
2919                                  int fl, struct thandle *handle)
2920 {
2921         struct osd_thandle *oh;
2922
2923         LASSERT(handle != NULL);
2924
2925         oh = container_of0(handle, struct osd_thandle, ot_super);
2926         LASSERT(oh->ot_handle == NULL);
2927
2928         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
2929                              strcmp(name, XATTR_NAME_VERSION) == 0 ?
2930                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE] :
2931                              osd_dto_credits_noquota[DTO_XATTR_SET]);
2932
2933         return 0;
2934 }
2935
2936 /*
2937  * Set the 64-bit version for object
2938  */
2939 static void osd_object_version_set(const struct lu_env *env,
2940                                    struct dt_object *dt,
2941                                    dt_obj_version_t *new_version)
2942 {
2943         struct inode *inode = osd_dt_obj(dt)->oo_inode;
2944
2945         CDEBUG(D_INODE, "Set version "LPX64" (old "LPX64") for inode %lu\n",
2946                *new_version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
2947
2948         LDISKFS_I(inode)->i_fs_version = *new_version;
2949         /** Version is set after all inode operations are finished,
2950          *  so we should mark it dirty here */
2951         ll_dirty_inode(inode, I_DIRTY_DATASYNC);
2952 }
2953
2954 /*
2955  * Concurrency: @dt is write locked.
2956  */
2957 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
2958                          const struct lu_buf *buf, const char *name, int fl,
2959                          struct thandle *handle, struct lustre_capa *capa)
2960 {
2961         struct osd_object      *obj      = osd_dt_obj(dt);
2962         struct inode           *inode    = obj->oo_inode;
2963         struct osd_thread_info *info     = osd_oti_get(env);
2964         int                     fs_flags = 0;
2965         ENTRY;
2966
2967         LASSERT(handle != NULL);
2968
2969         /* version set is not real XATTR */
2970         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
2971                 /* for version we are just using xattr API but change inode
2972                  * field instead */
2973                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
2974                 osd_object_version_set(env, dt, buf->lb_buf);
2975                 return sizeof(dt_obj_version_t);
2976         }
2977
2978         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
2979                 return -EACCES;
2980
2981         CDEBUG(D_INODE, DFID" set xattr '%s' with size %zd\n",
2982                PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
2983
2984         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
2985         if (fl & LU_XATTR_REPLACE)
2986                 fs_flags |= XATTR_REPLACE;
2987
2988         if (fl & LU_XATTR_CREATE)
2989                 fs_flags |= XATTR_CREATE;
2990
2991         return __osd_xattr_set(info, inode, name, buf->lb_buf, buf->lb_len,
2992                                fs_flags);
2993 }
2994
2995 /*
2996  * Concurrency: @dt is read locked.
2997  */
2998 static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
2999                           struct lu_buf *buf, struct lustre_capa *capa)
3000 {
3001         struct osd_object      *obj    = osd_dt_obj(dt);
3002         struct inode           *inode  = obj->oo_inode;
3003         struct osd_thread_info *info   = osd_oti_get(env);
3004         struct dentry          *dentry = &info->oti_obj_dentry;
3005
3006         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3007         LASSERT(inode->i_op != NULL && inode->i_op->listxattr != NULL);
3008         LASSERT(osd_read_locked(env, obj) || osd_write_locked(env, obj));
3009
3010         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
3011                 return -EACCES;
3012
3013         dentry->d_inode = inode;
3014         dentry->d_sb = inode->i_sb;
3015         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
3016 }
3017
3018 static int osd_declare_xattr_del(const struct lu_env *env,
3019                                  struct dt_object *dt, const char *name,
3020                                  struct thandle *handle)
3021 {
3022         struct osd_thandle *oh;
3023
3024         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3025         LASSERT(handle != NULL);
3026
3027         oh = container_of0(handle, struct osd_thandle, ot_super);
3028         LASSERT(oh->ot_handle == NULL);
3029
3030         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
3031                              osd_dto_credits_noquota[DTO_XATTR_SET]);
3032
3033         return 0;
3034 }
3035
3036 /*
3037  * Concurrency: @dt is write locked.
3038  */
3039 static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
3040                          const char *name, struct thandle *handle,
3041                          struct lustre_capa *capa)
3042 {
3043         struct osd_object      *obj    = osd_dt_obj(dt);
3044         struct inode           *inode  = obj->oo_inode;
3045         struct osd_thread_info *info   = osd_oti_get(env);
3046         struct dentry          *dentry = &info->oti_obj_dentry;
3047         int                     rc;
3048
3049         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3050         LASSERT(inode->i_op != NULL && inode->i_op->removexattr != NULL);
3051         LASSERT(handle != NULL);
3052
3053         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
3054                 return -EACCES;
3055
3056         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
3057
3058         ll_vfs_dq_init(inode);
3059         dentry->d_inode = inode;
3060         dentry->d_sb = inode->i_sb;
3061         rc = inode->i_op->removexattr(dentry, name);
3062         return rc;
3063 }
3064
3065 static struct obd_capa *osd_capa_get(const struct lu_env *env,
3066                                      struct dt_object *dt,
3067                                      struct lustre_capa *old, __u64 opc)
3068 {
3069         struct osd_thread_info *info = osd_oti_get(env);
3070         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
3071         struct osd_object *obj = osd_dt_obj(dt);
3072         struct osd_device *osd = osd_obj2dev(obj);
3073         struct lustre_capa_key *key = &info->oti_capa_key;
3074         struct lustre_capa *capa = &info->oti_capa;
3075         struct obd_capa *oc;
3076         struct lu_capainfo *lci;
3077         int rc;
3078         ENTRY;
3079
3080         if (!osd->od_fl_capa)
3081                 RETURN(ERR_PTR(-ENOENT));
3082
3083         LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
3084         LINVRNT(osd_invariant(obj));
3085
3086         /* renewal sanity check */
3087         if (old && osd_object_auth(env, dt, old, opc))
3088                 RETURN(ERR_PTR(-EACCES));
3089
3090         lci = lu_capainfo_get(env);
3091         if (unlikely(lci == NULL))
3092                 RETURN(ERR_PTR(-ENOENT));
3093
3094         switch (lci->lci_auth) {
3095         case LC_ID_NONE:
3096                 RETURN(NULL);
3097         case LC_ID_PLAIN:
3098                 capa->lc_uid = obj->oo_inode->i_uid;
3099                 capa->lc_gid = obj->oo_inode->i_gid;
3100                 capa->lc_flags = LC_ID_PLAIN;
3101                 break;
3102         case LC_ID_CONVERT: {
3103                 __u32 d[4], s[4];
3104
3105                 s[0] = obj->oo_inode->i_uid;
3106                 cfs_get_random_bytes(&(s[1]), sizeof(__u32));
3107                 s[2] = obj->oo_inode->i_gid;
3108                 cfs_get_random_bytes(&(s[3]), sizeof(__u32));
3109                 rc = capa_encrypt_id(d, s, key->lk_key, CAPA_HMAC_KEY_MAX_LEN);
3110                 if (unlikely(rc))
3111                         RETURN(ERR_PTR(rc));
3112
3113                 capa->lc_uid   = ((__u64)d[1] << 32) | d[0];
3114                 capa->lc_gid   = ((__u64)d[3] << 32) | d[2];
3115                 capa->lc_flags = LC_ID_CONVERT;
3116                 break;
3117         }
3118         default:
3119                 RETURN(ERR_PTR(-EINVAL));
3120         }
3121
3122         capa->lc_fid = *fid;
3123         capa->lc_opc = opc;
3124         capa->lc_flags |= osd->od_capa_alg << 24;
3125         capa->lc_timeout = osd->od_capa_timeout;
3126         capa->lc_expiry = 0;
3127
3128         oc = capa_lookup(osd->od_capa_hash, capa, 1);
3129         if (oc) {
3130                 LASSERT(!capa_is_expired(oc));
3131                 RETURN(oc);
3132         }
3133
3134         spin_lock(&capa_lock);
3135         *key = osd->od_capa_keys[1];
3136         spin_unlock(&capa_lock);
3137
3138         capa->lc_keyid = key->lk_keyid;
3139         capa->lc_expiry = cfs_time_current_sec() + osd->od_capa_timeout;
3140
3141         rc = capa_hmac(capa->lc_hmac, capa, key->lk_key);
3142         if (rc) {
3143                 DEBUG_CAPA(D_ERROR, capa, "HMAC failed: %d for", rc);
3144                 RETURN(ERR_PTR(rc));
3145         }
3146
3147         oc = capa_add(osd->od_capa_hash, capa);
3148         RETURN(oc);
3149 }
3150
3151 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt)
3152 {
3153         struct osd_object       *obj    = osd_dt_obj(dt);
3154         struct inode            *inode  = obj->oo_inode;
3155         struct osd_thread_info  *info   = osd_oti_get(env);
3156         struct dentry           *dentry = &info->oti_obj_dentry;
3157         struct file             *file   = &info->oti_file;
3158         int                     rc;
3159
3160         ENTRY;
3161
3162         dentry->d_inode = inode;
3163         dentry->d_sb = inode->i_sb;
3164         file->f_dentry = dentry;
3165         file->f_mapping = inode->i_mapping;
3166         file->f_op = inode->i_fop;
3167         set_file_inode(file, inode);
3168 #ifndef HAVE_FILE_FSYNC_4ARGS
3169         mutex_lock(&inode->i_mutex);
3170 #endif
3171         rc = do_fsync(file, 0);
3172 #ifndef HAVE_FILE_FSYNC_4ARGS
3173         mutex_unlock(&inode->i_mutex);
3174 #endif
3175         RETURN(rc);
3176 }
3177
3178 static int osd_data_get(const struct lu_env *env, struct dt_object *dt,
3179                         void **data)
3180 {